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KR-102963832-B1 - Pressure monitoring device in city gas pressure chamber

KR102963832B1KR 102963832 B1KR102963832 B1KR 102963832B1KR-102963832-B1

Abstract

The present invention relates to a pressure monitoring device for a city gas pressure regulating room. According to the present invention, a gas pressure monitoring system for measuring the pressure of a gas supply pipe (Gp) of a city gas pressure regulating room (Rin) installed in a building or multi-unit dwelling and displaying the measured pressure comprises: a gas pressure measuring device (200) installed on the gas supply pipe (Gp) of a gas pressure regulating facility (Gs) installed in the city gas pressure regulating room (Rin) to measure the pressure of the gas supply pipe (Gp); and a gas pressure monitoring device (100) installed outside the pressure regulating room (Rin), supplying an operating voltage to the gas pressure measuring device (200), storing the gas pressure value measured by the gas pressure measuring device (200), and notifying the outside that it is an abnormal pressure when an abnormal pressure deviating from a preset normal pressure is measured. The gas pressure monitoring device (100) and the gas pressure measuring device (200) are connected by a cable (Ne) composed of three strands of wires (N1, N2, N3). It is characterized by the fact that.

Inventors

  • 라강문

Assignees

  • 한울계기공업 주식회사

Dates

Publication Date
20260512
Application Date
20251211

Claims (9)

  1. A gas pressure monitoring system that measures the pressure of the gas supply pipe (Gp) of a city gas pressure regulating room (Rin) installed in a building or multi-unit dwelling and displays the measured pressure, A gas pressure measuring device (200) installed in the gas supply pipe (Gp) of a gas pressure regulating facility (Gs) installed in a city gas pressure regulating room (Rin) to measure the pressure of the gas supply pipe (Gp), and It is configured to include a gas pressure monitor (100) that is installed outside the pressure chamber (Rin), supplies an operating voltage to the gas pressure measuring device (200), stores the gas pressure value measured by the gas pressure measuring device (200), and notifies the outside that it is an abnormal pressure when an abnormal pressure is measured that deviates from a preset normal pressure. The above gas pressure monitor (100) and gas pressure measuring device (200) are connected by a cable (Ne) consisting of three strands of wire (N1, N2, N3), and Among the three strands of wire of the above cable (Ne), One wire (N1) is a power line to which voltage is applied and current is input, and at the same time a data line (D+) for 485 communication, and Another wire (N2) is a data line (D-) for 485 communication, and The remaining wire (N3) is composed of a ground wire (Gnd), and The gas pressure measuring device (200) converts the measured current pressure value (Pp) into a digital value and then transmits it to the gas pressure monitoring device (100). The above gas pressure monitor (100) is, The current pressure value (Pp) of the digital code value received from the gas pressure measuring device (200) is stored, and the stored current pressure value is displayed as a number. The above gas pressure monitor (100) receives commercial power (AC), converts it into a transmission voltage (Vt) for operating the gas pressure measuring device (200), and supplies power to the gas pressure measuring device (200) through one of the wires (N1) of the connected cables (Ne). The above gas pressure measuring device (200) is characterized by operating by receiving constant power converted into a transmission voltage (Vc) from the above gas pressure monitoring device (100), thereby forming a city gas pressure monitoring room pressure monitoring device.
  2. In claim 1, The above gas pressure measuring device (200) is, A high pressure sensor (241) for measuring the high pressure of the gas pressure regulating facility (Gs), and A high pressure amplification unit (242) that amplifies the high pressure value measured by the high pressure sensor (241) into a value that can be read by the sensor control unit (210), and A low pressure sensor (231) that measures the low pressure after being reduced by a regulator in a gas pressure regulating facility (Gs), and A low pressure amplification unit (232) that amplifies the low pressure value measured by the low pressure sensor (231) into a value that can be read by the sensor control unit (210), and A sensor control unit (210) that controls the transmission to a gas pressure monitor (100) through a sensor RS485 communication unit (250) after converting the low pressure value received from the low pressure amplifier (232) and the high pressure value received from the high pressure amplifier (242) into digital values, and A sensor RS485 communication unit (250) connected to one end of the above cable (Ne) and transmitting the low pressure value and high pressure value of the digital code received from the sensor control unit (210) to the gas pressure monitor (100) by means of a transmission control command of the sensor control unit (210), and It is configured to include an operating voltage conversion unit (260) that converts a transmission voltage (Vt) transmitted and input from a gas pressure monitor (100) into an operating voltage (Vp) for operating a gas pressure measuring device (200) and supplies it to the configuration of the gas pressure measuring device (200). The above gas pressure measuring device (200) is installed in the gas supply pipe (Gp) of the city gas regulating room (Rin) and can measure high gas pressure (Ph) and low gas pressure (Pl). When only the low-pressure gas pressure (Pl) is measured, only the measured low-pressure gas pressure value is transmitted to the gas pressure monitor (100), and When high gas pressure (Ph) and low gas pressure (Pl) are measured simultaneously, the measured low gas pressure value and high gas pressure value are transmitted to the gas pressure monitor (100). The above gas pressure monitor (100) is, A setting value input unit (120) for inputting and setting upper and lower limits of the normal pressure range of high pressure and inputting upper and lower limits of the normal pressure range of low pressure, and A main RS485 communication unit (171) connected to the other end of the above cable (Ne) and receiving a digital pressure value input from the sensor RS485 communication unit (250) through the cable (Ne), and The setting value including the upper and lower limits of the high pressure and the upper and lower limits of the low pressure input from the setting value input unit (120) is stored and controlled in the setting value storage unit (141). The main RS485 communication unit (171) reads the current pressure value received and controls the storage of the received current pressure value (Pp) in the measurement pressure storage unit. It is determined whether the current pressure received through the main RS485 communication unit (171) is a high pressure value or a low pressure value, and if the received current pressure value is high pressure, it is determined whether it exceeds the preset upper and lower limits of high pressure, and if the received current pressure value is low pressure, it is determined whether it exceeds the preset upper and lower limits of low pressure, and if it is determined that it exceeds the upper and lower limits of high pressure or exceeds the upper and lower limits of low pressure, an alarm sound control signal is output to the alarm sound output unit (181). It is determined whether the current pressure received through the main RS485 communication unit (171) is a high pressure value or a low pressure value, and if the received current pressure value is high pressure, it is determined whether it exceeds the preset upper and lower limits of high pressure, and if the received current pressure value is low pressure, it is determined whether it exceeds the preset upper and lower limits of low pressure, and if it is determined that it exceeds the upper and lower limits of high pressure or the upper and lower limits of low pressure, an alarm light control signal is output to the abnormal pressure LED (182, 183). Determine whether the received current pressure is a high pressure value or a low pressure value, and If the received current pressure is a high pressure value, the received high pressure value (Ph) is controlled to be displayed on a high pressure FND (7-segment display, Flexible Numeric Display), and A main control unit (110) that controls the received low pressure value (Pl) to be displayed on a low pressure FND (173) when the received current pressure is a low pressure value, and A setting value storage unit (141) that stores the upper and lower limits of the normal pressure range of high pressure and the upper and lower limits of the normal pressure range of low pressure, input from the setting value input unit (120) by the write control of the main control unit (110), and The above main control unit (110) has an RTC circuit unit (130) for recording the time at which the current pressure value received by the main RS485 communication unit (150) was read, and A measuring pressure storage unit (142) that stores the current pressure value (Pp) input from the gas pressure measuring device (200) by the write control of the main control unit (110) by matching it to the date and time read by the main control unit (110), and A high-pressure FND (172) that displays the high-pressure gas pressure (Ph) measured by the high-pressure pressure sensor (241) as a number under the control of the main control unit (110), and A low pressure FND (173) that displays the low pressure gas pressure (Pl) measured by the low pressure sensor (231) as a number under the control of the main control unit (110), and When an alarm sound control signal is received from the main control unit (110), an alarm sound output unit (181) outputs an alarm sound indicating that the current pressure of the gas pressure regulating facility (Gs) of the pressure regulating room (Rin) has deviated from the normal range, and When an alarm light-emitting control signal is received from the main control unit (110), an abnormal pressure LED (182, 183) emits light to indicate that the current pressure of the gas pressure regulating facility (Gs) of the pressure regulating room (Rin) has deviated from the normal range, and A city gas pressure monitoring device for a regulating pressure room, characterized by comprising a voltage conversion unit (160) that receives commercial AC power, converts it into a transmission voltage of a gas pressure measuring device (200), supplies operating power to the gas pressure measuring device (200) through the cable (Ne) under the control of the main control unit (110), and supplies a transmission voltage to each element and component of the gas pressure monitoring device (100).
  3. In claim 2, The above main control unit (110) is, It is determined whether the current pressure received through the main RS485 communication unit (171) is a high pressure value or a low pressure value, and if the received current pressure value is a high pressure value, The current high pressure value received through the main RS485 communication unit (150) is compared with the normal high pressure value (pressure within the range of the lower high pressure value and the upper high pressure value) already stored in the setting value storage unit (141), and If it is determined by the above comparison that the current pressure value deviates from the normal high pressure value stored in the set value storage unit (141), a high pressure side abnormal pressure alarm control signal is output to the alarm sound output unit (181). It is determined whether the current pressure received through the main RS485 communication unit (171) is a high pressure value or a low pressure value, and if the current pressure value received through the determination is a low pressure value, the current low pressure value received through the main RS485 communication unit (150) is compared with the normal low pressure value (pressure within the range of the lower limit value of the low pressure and the upper limit value of the low pressure) stored in the setting value storage unit (141). A city gas pressure monitoring device for a regulating pressure room, characterized by outputting a low-pressure side abnormal pressure alarm control signal to the alarm sound output unit (181) when it is determined through the above comparison that the current pressure value deviates from the normal low-pressure value stored in the setting value storage unit (141).
  4. In claim 2, The above abnormal pressure LEDs (182, 183) are, A high-pressure side abnormal pressure LED (182) that lights up according to the high-pressure side abnormal pressure alarm light control signal of the main control unit (110) above, and indicates when a pressure value exceeding the upper limit of the high pressure or a pressure value below the lower limit of the high pressure is received, and It is configured to include a low-pressure side abnormal pressure LED (183) that lights up according to the low-pressure side abnormal pressure alarm light control signal of the main control unit (110) above, and indicates when a pressure value exceeding the upper limit of the low pressure or a pressure value below the lower limit of the low pressure is received. The above main control unit (110) is, It is determined whether the current pressure received through the main RS485 communication unit (171) is a high pressure value or a low pressure value, and if the received current pressure value is a high pressure value, The current high pressure value received through the main RS485 communication unit (150) and the normal high pressure value stored in the setting value storage unit (141) are compared, and If it is determined by the above comparison that the current pressure value deviates from the normal high pressure value stored in the set value storage unit (141), a high pressure side abnormal pressure alarm light control signal is output to the high pressure side abnormal pressure LED (182). In addition, the main control unit (110) is, It is determined whether the current pressure received through the main RS485 communication unit (171) is a high pressure value or a low pressure value, and if the current pressure value received is a low pressure value based on the determination, The current low pressure value received through the main RS485 communication unit (150) and the normal low pressure value stored in the setting value storage unit (141) are compared, and A city gas pressure monitoring device for a regulating pressure room, characterized by outputting a low-pressure side abnormal pressure alarm light control signal to the low-pressure side abnormal pressure LED (183) when it is determined through the above comparison that the current pressure value deviates from the normal low-pressure value stored in the setting value storage unit (141).
  5. In claim 2, The above setting value input unit (120) is, A high pressure normal pressure input section (121), which is a user interface (UI) for inputting the upper limit value and the lower limit value of the high pressure, which are the normal pressure range of the high pressure, and A low pressure normal pressure input unit (122), which is a user interface (UI) for inputting the upper limit value and the lower limit value of the low pressure, which are the normal pressure range of the low pressure, and A storage period setting unit (123) for setting the period during which the current pressure value received from the gas pressure measuring device (200) is stored in the measurement pressure storage unit (142), and It is configured to further include a storage period setting unit (124) for setting the period during which the current pressure value (Pp) stored in the above-mentioned measurement pressure storage unit (142) is stored, and The above main control unit (110) is, The storage period input by the storage period setting unit (123) and the storage period input by the storage period setting unit (124) are stored and controlled in the setting value storage unit (141), and The above-mentioned setting value storage unit (141) is characterized by storing a storage cycle and a storage period under the control of the main control unit (110), in a city gas pressure monitoring room pressure monitoring device.
  6. In claim 5, A storage medium connection port (151) for connecting an external storage medium (152) inserted therein, and The above storage medium connection port (151) is inserted and connected, and an external storage medium (152) that stores data is further included and configured. The above setting value input unit (120) is, It is configured to further include an automatic backup command unit (125), which is a user interface for inputting a command to automatically back up the current pressure value (Pp) stored in the above-mentioned pressure storage unit (142) to an external storage medium (152). The above main control unit (110) is, When an automatic backup command is input from the automatic backup command unit (125), the measured pressure value stored in the measured pressure storage unit (142) is automatically backed up to an external storage medium (152) at the time of the end of the storage period set by the storage period setting unit (124). The above main control unit (110) is characterized by erasing the high and low pressure values stored in the measurement pressure storage unit (142), which is the backed-up data, at the time when data backup is completed, in a city gas regulating pressure room pressure monitoring device.
  7. In claim 6, The above setting value input unit (120) is, It is further configured to include an automatic backup time setting unit (126) for setting an automatic backup time so that the current pressure value (Pp) stored in the above-mentioned pressure storage unit (142) is automatically backed up and stored in the above-mentioned external storage medium (152). The above main control unit (110) is, When automatic backup time information is input from the automatic backup time setting unit (126), the input automatic backup time information is controlled to be stored in the setting value storage unit (141). The above setting value storage unit (141) stores automatic backup time information input from the automatic backup time setting unit (126) under the control of the main control unit (110), and The above main control unit (110) is, When the automatic backup time entered from the automatic backup time setting unit (126) is stored in the above setting value storage unit (141), From the point in time at the end of the storage period set by the storage period setting unit (124) The automatic backup point is updated and calculated by reversing the time from the automatic backup point, and At the time of the automatic backup calculated above, the main control unit (110) is, The measured pressure value stored in the above-mentioned measured pressure storage unit (142) is automatically backed up to an external storage medium (152), and The above main control unit (110) is characterized by erasing the high and low pressure values stored in the measurement pressure storage unit (142), which is the backed-up data, at the time when data backup is completed, in a city gas regulating pressure room pressure monitoring device.
  8. In claim 2, In claim 2, The above gas pressure measuring device (200) further includes a sensor input setting unit (220), and The sensor input setting unit (220) above is, A correction value setting unit (221) for correcting a pressure value input from a high pressure sensor (241) or a low pressure sensor (231), and A sensor type selection unit (222) for selecting whether the input pressure value is a high pressure sensor or a low pressure sensor, and A pressure scale selection unit (223) for inputting a pressure scale to be measured by a pressure sensor, and, A city gas pressure monitoring device for a regulating pressure room, characterized by comprising a pressure section setting unit (224) for selecting a pressure section to divide each pressure scale into multiple sections.
  9. In claim 2, The above gas pressure monitor (100) is, When the alarm sound output unit (181) receives an alarm sound control signal from the main control unit (110) and outputs an alarm sound, the alarm sound output stop button (191) for inputting an alarm sound output stop signal is further included to stop the output of the alarm sound. The above main control unit (110) is, When an alarm sound output stop signal is input from the above alarm sound output stop button (191), the output of the alarm sound control signal output to the above alarm sound output unit (181) is stopped. The above alarm sound output unit (181) does not output an alarm sound, and A casing body (101) having a space formed therein, and The casing body (101) is configured to further include a casing cover (102) by means of a hinge, and The above main control unit (110), RTC circuit unit (130), setting value storage unit (141), measurement pressure storage unit (142), voltage converter unit (160), main RS485 communication unit (171), and Bluetooth communication unit (192) are mounted on the main PCB (M1) and installed in the casing body (101). The above-mentioned setting value input section (120), connection port (151), high pressure FND (172), low pressure FND (173), alarm sound output section (181), high pressure side abnormal pressure LED (182), low pressure side abnormal pressure LED (183), communication status display LED (184), and alarm sound output stop button (191) are mounted on the cover PCB (M2). A city gas pressure monitoring device characterized by being provided on the inner surface of the casing cover (102).

Description

Pressure monitoring device in city gas pressure chamber The present invention relates to a pressure monitoring device for a city gas regulating pressure room. Generally, the basements of buildings or multi-unit dwellings serve as city gas pressure regulating rooms to receive high-pressure gas from the city gas supplier (gas company) and supply it to consumers at a lower pressure. Figure 1 shows a very schematic conceptual diagram of a typical city gas pressure regulating room (Rin). As illustrated in FIG. 1, a pressure regulating facility (Sg) is installed in the city gas pressure regulating room (Rin) to reduce high-pressure gas to a low gas pressure that can be ignited by the user. In this pressure regulating facility (Sg), a regulator (5) is installed in the gas supply pipe (Gp) to reduce the pressure of the gas, a spring-loaded analog pressure recorder (1) is installed to record the city gas pressure on a recording sheet, and a pressure gauge (2) is installed to measure the pressure and transmit a signal to an external abnormal pressure notifier (3) as a contact signal (contact on, contact off) of high and low signals. And in the control room (Rout) located outside the pressure room (Rin), an abnormal pressure notifier (3) is provided, which is connected to the pressure gauge (2) by a contact line and receives a high signal or a low signal from the pressure gauge (2) to indicate an abnormal pressure condition with a buzzer sound. Also, the pressure gauge (2) and the abnormal pressure notifier (3) are connected only by three wires and transmit only high and low signals. And, the spring-type analog pressure recorder (1) recorded pressure on the recording paper in a spring-type manner, but the spring-type analog pressure recorder (1) was not linked with the pressure gauge (2) and the abnormal pressure notifier (3). Conventional city gas abnormal pressure notification devices had the following problems. First, when abnormal pressure occurs, only the alarm buzzer sounds from the abnormal pressure notifier (3), but when the alarm buzzer sounds, there is the inconvenience of having to go to the site (pressure regulating room). There was the inconvenience of having to enter the pressure regulating room to check the pressure recorder. Second, the pressure gauge is installed inside the pressure regulating room, and the pressure gauge (20) is operated by a battery. To replace the battery, one must enter the pressure regulating room, which is very dangerous. Therefore, one had to contact a city gas company, which is a city gas expert, to replace it, which was very inconvenient. An invention that improves upon such conventional technology for recording and notifying abnormal city gas pressure is known as a "digital abnormal pressure notification system" disclosed in Korean Published Patent Application No. 10-2017-0137256 (Date of publication December 13, 2017). The "digital abnormal pressure notification system" disclosed in the above-mentioned published patent application No. 10-2017-0137256 (date of publication December 13, 2017) is a technology that can monitor the pressure of a static pressure room from the outside and has solved some of the problems of conventional abnormal pressure notification devices. However, according to the published patent application No. 10-2017-0137256 (published on December 13, 2017) which discloses a "digital abnormal pressure notification system," it is disclosed that "the digital abnormal pressure notification device (130) supplies power to the pressure transmitter (110), receives an analog pressure value from the pressure transmitter (110), and converts it into a digital pressure value." However, according to the technology disclosed in the “Digital Abnormal Pressure Notification System” disclosed in the above-mentioned published patent application No. 10-2017-0137256 (Date of publication: Dec. 13, 2017), the pressure transmitter (110) transmits the measured pressure value as an analog signal to the digital abnormal pressure notification device (130), so it is a technology that cannot transmit power from the digital abnormal pressure notification device (130) to the pressure transmitter (110). In particular, according to the above technology, three wires are required to supply power to a low-pressure transmitter and five wires are required to supply power to a high-pressure transmitter, which is very cumbersome and inconvenient because the wiring must be done anew for each type of pressure transmitter. Figure 1 is a very schematic diagram of the configuration of a typical city gas pressure regulating room (Rin). FIG. 2 is a schematic diagram of a city gas pressure monitoring room pressure device according to one embodiment of the present invention. FIG. 3 is a block diagram of a gas pressure monitor (100) in a city gas pressure monitoring room pressure monitoring device according to one embodiment of the present invention. FIG. 4 is a block diagram of a gas pressure measuring inst