CN-117781160-B - High-precision automatic pumping and inflating equipment for inertial platform and pumping and inflating method thereof

CN117781160BCN 117781160 BCN117781160 BCN 117781160BCN-117781160-B

Abstract

The invention relates to the field of maintenance of platform type inertial navigation products, in particular to high-precision inertial platform automatic pumping and inflating equipment and a pumping and inflating method thereof; the nitrogen cylinder cabinet is used for storing equipment with air outlet pressure, and comprises the specific steps of 1, adjusting the pressure, 2, vacuumizing, 3, filling nitrogen, 4, improving the purity of the nitrogen filled in an inertial platform, realizing automatic air suction and inflation functions through an absolute pressure sensor and a pressure display instrument, enabling a user not to manually disconnect an air suction and inflation switch through an observation pressure gauge, and enabling an electric high-vacuum pressure reducing valve to be additionally arranged between the air suction and inflation pressure and the vacuum degree pressure of the inertial platform, so that on one hand, the inflation pressure can be adjusted, on the other hand, the air pressure in the inertial platform is ensured to be stable after the air suction valve is disconnected, and on the other hand, high-precision control of the nitrogen pressure in the inertial platform is realized by adjusting a front-stage inflation pressure value.

Inventors

YIN JINJUN
LIU XIANGSHUI
SONG ZHONGJIAN
CHEN GANG
SHU YANG
ZHU DONGQI

Assignees

国营芜湖机械厂

Dates

Publication Date: 20260508
Application Date: 20231212

Claims (7)

1. The high-precision automatic pumping and inflating equipment for the inertial platform is characterized by comprising the following components: A display control panel (100) for facilitating manual operation of the screen; A nitrogen cylinder cabinet (200) for storing the equipment of the air outlet pressure; the nitrogen cylinder cabinet (200) comprises two groups of nitrogen cylinders (201), a nitrogen cylinder pressure reducing valve, a pressure sensor, an electromagnetic valve A, a precision filter, a nitrogen cylinder precision pressure reducing valve, a precision throttle valve, an electromagnetic valve B, an absolute pressure sensor, an electric high-vacuum pressure reducing valve, an electromagnetic valve C arranged at the rear section of the electromagnetic valve B and connected with the absolute pressure sensor in series, a vacuum pump connected with the electromagnetic valve C and an electric high-vacuum pressure reducing valve controller connected with the electric high-vacuum pressure reducing valve, wherein the nitrogen cylinder pressure reducing valve, the pressure sensor, the electromagnetic valve A, the precision filter, the nitrogen cylinder precision pressure reducing valve, the precision throttle valve, the electromagnetic valve B, the absolute pressure sensor, the electric high-vacuum pressure reducing valve, the electromagnetic valve C and the vacuum pump are sequentially connected with the nitrogen cylinders (201); The electric high-vacuum pressure reducing valve controller comprises an automatic fuse SB and a fuse BXL which automatically disconnect a power supply of equipment when the current is overlarge, an alternating-current contactor K2 which is used for disconnecting a pumping and charging power supply when the gas outlet pressure of a nitrogen cylinder (201) is overlarge or is overlarge, a buzzer A and a buzzer control switch K7 which are used for giving out an overpressure/pressure shortage alarm, a total power supply switch SB1 which is used for switching on and off the pumping and charging power supply of the equipment, pressure display instruments XMT 1-XMT 3 which are used for detecting pumping and charging pressure, absolute pressure sensors 1-3, a temperature controller KT which is used for detecting the environmental temperature of the equipment, a solenoid valve YA which is used for controlling the gas outlet pipeline switch control of the nitrogen cylinder, a solenoid valve YB which is used for controlling the pumping pipeline switch control, a delay relay K3 which is used for controlling the pumping pipeline switch control, a charging to switch K5, a pumping to switch K6, an electric high-vacuum pressure reducing valve KZQ and a vacuum reducing valve control switch K4, wherein the pressure display instruments XMT 1-XMT 3 and the absolute pressure sensor 1-XMT 3 are respectively combined to detect the pumping and charging pressure and the absolute pressure, the pressure sensor controller is used for detecting the pressure and the pressure sensor XMT 4.
2. The high-precision automatic pumping and inflating equipment for the inertia platform, as set forth in claim 1, wherein the display control panel (100) comprises a vacuum degree display instrument (101), a pumping and inflating pressure display instrument (102), a nitrogen cylinder pressure display instrument (103), a pumping indicator lamp (104), a pumping and inflating indicator lamp (105), a pumping indicator lamp (106), a pumping and inflating indicator lamp (107), a power indicator lamp (108), a total power switch (109), a pumping switch (110), a pumping switch (111), a precise pressure gauge (112), a precise throttle valve (113), a buzzer (114) and a silencing switch (115).
3. The high-precision automatic pumping and inflating equipment for the inertial platform according to claim 1, wherein the two groups of nitrogen cylinders are respectively used for inflating the inertial platform and serving as standby nitrogen cylinders.
4. The high-precision automatic pumping and inflating equipment for the inertial platform of claim 1, wherein the vacuum pump is a double-stage rotary vane vacuum pump.
5. The high-precision automatic pumping and inflating equipment for the inertial platform is characterized in that a gas cylinder switch (202) and a gas cylinder pressure regulating switch (203) are arranged on a nitrogen cylinder (201), a gas outlet pipe pressure gauge (204) and a nitrogen cylinder pressure gauge (205) which are respectively used for monitoring the pressure of the nitrogen cylinder (201) and the inflation gas outlet pressure are arranged on the gas cylinder pressure regulating switch (203), and a gas outlet pipe (206) connected with the gas cylinder pressure regulating switch (203).
6. The pumping and inflating method for the high-precision automatic pumping and inflating equipment for the inertial platform according to any one of claims 1 to 5 is characterized by comprising the following specific steps: step 1, adjusting pressure, namely switching on an automatic fuse SB, enabling a buzzer A to work for alarming, opening a gas cylinder switch (202) of a nitrogen cylinder, and adjusting a gas cylinder pressure regulating switch (203) to enable an indicating value of a nitrogen cylinder pressure indicator (103) on a display control panel (100) to be 0.1-0.5 MPa, wherein the buzzer A stops alarming, and preparing for working before starting up is completed; Step 2, vacuumizing, namely closing a main power switch (109) on a display control panel (100), closing an air extraction switch (111), lighting an air extraction indicator lamp (104) on the panel, operating a vacuum pump, starting vacuumizing an inertial platform, when the display pressure of an air extraction pressure display instrument (102) is lower than 3KPa, lighting the air extraction indicator lamp (105), automatically delaying the equipment for 10 seconds, stopping the vacuum pump, and at the moment, turning off the air extraction indicator lamp (104), and closing the air extraction switch (111); Step 3, charging nitrogen, namely closing an inflation switch (110), and starting to charge the inertial platform with the nitrogen when an inflation indicator lamp (106) is on; And 4, improving the purity of nitrogen filled in the inertial platform, namely repeatedly carrying out step S2 and step S3 for 2-3 times, selecting a static boosting method to measure the air leakage rate of the inertial platform after vacuumizing once, starting to carry out air leakage rate test after the air is exhausted and the indicator lamp (105) is on, and judging that the pressure change displayed by the vacuum degree display instrument (101) is not larger than the maximum value of the equipment leakage rate within 2 hours, wherein the equipment leakage rate is not more than 3.0x10 < -4 > KPa >. L/S.
7. The method of claim 6, wherein in the step S3, when the display pressure of the pumping pressure indicator (102) reaches the set pumping pressure, that is, the nitrogen pressure in the inertial platform is 95.3 KPa+ -3 KPa, the pumping pressure indicator (102) is adjusted to the set pressure value by adjusting the pumping pressure, the pumping is automatically stopped, and at the moment, the pumping indicator lamp (106) is turned off, the pumping indicator lamp (107) is turned on, and the pumping switch (110) is turned off.

Description

High-precision automatic pumping and inflating equipment for inertial platform and pumping and inflating method thereof Technical Field The invention relates to the field of maintenance of platform type inertial navigation products, in particular to high-precision inertial platform automatic pumping and inflating equipment and a pumping and inflating method thereof. Background A large number of conductive rings, motors and other electromechanical integrated devices are used in an inertial platform of the platform type inertial navigation product, and electric sparks can be possibly caused due to charged rotation of the devices in the working process, so that carbon deposition of a conductive ring slip ring and a motor brush is easily caused, the working performance of the devices is influenced, the performance of the inertial navigation product is reduced and even the inertial navigation product cannot work normally, and therefore, the phenomenon of electric sparks is generally prevented by filling nitrogen into the inertial platform as protective gas. Currently commonly used inertial platform inflation equipment generally adopts a manual inflation method, and the method is used for manually disconnecting and controlling vacuumizing and inflation by observing a pressure gauge of the inflation equipment connected with the inertial platform. The vacuum pumping is incomplete, so that redundant air in the inertial platform cannot be thoroughly removed, and the purity of the nitrogen is reduced after the air is inflated. The air leakage rate of the inertial platform cannot be effectively checked. The inflation pressure precision is low, and the balance with the external atmospheric pressure can not be achieved, so that the nitrogen leakage speed in the inertial platform is too high, and the protection of the whole product in the working effective period can not be ensured. In the inflation process, the inflation speed is uneven, the pressure is uncontrollable, and the damage to personnel or precise components in the inertial platform is easily caused by the overlarge pressure. During inflation, impurities in the nitrogen cylinder can enter the inertial platform along with the inflation process, so that the product is damaged. Disclosure of Invention In order to solve the problems, the invention provides high-precision automatic pumping and inflating equipment for an inertial platform and a pumping and inflating method thereof. A high precision inertial platform automatic pumping and inflating device, comprising: A display control panel which is convenient for manually operating the screen; The nitrogen cylinder cabinet is used for storing equipment with air outlet pressure; the nitrogen cylinder cabinet comprises two groups of nitrogen cylinders, a nitrogen cylinder pressure reducing valve, a pressure sensor, an electromagnetic valve A, a precision filter, a nitrogen cylinder precision pressure reducing valve, a precision throttle valve, an electromagnetic valve B, an absolute pressure sensor, an electric high-vacuum pressure reducing valve, an electromagnetic valve C arranged at the rear section of the electromagnetic valve B and connected with the absolute pressure sensor in series, a vacuum pump connected with the electromagnetic valve C and an electric high-vacuum pressure reducing valve controller connected with the electric high-vacuum pressure reducing valve. The display control panel comprises a vacuum degree display instrument, an inflation pressure display instrument, a nitrogen cylinder pressure display instrument, an air exhaust indicator lamp, an air inflation indicator lamp, a power indicator lamp, a main power switch, an air inflation switch, an air exhaust switch, a precise pressure gauge, a precise throttle valve, a buzzer and a silencing switch. The two groups of nitrogen cylinders are respectively used for inflating the inertial platform and are used as standby nitrogen cylinders. The vacuum pump adopts a double-stage rotary vane vacuum pump. The nitrogen cylinder is provided with a cylinder switch, a cylinder pressure regulating switch, an air outlet pipe pressure gauge and a nitrogen cylinder pressure gauge which are arranged on the cylinder pressure regulating switch 203 and are respectively used for monitoring the pressure of the nitrogen cylinder and the pressure of the inflated air outlet, and an air outlet pipe connected with the cylinder pressure regulating switch. The electric high-vacuum pressure reducing valve controller comprises an automatic fuse SB and a fuse BXL for automatically disconnecting a power supply of equipment when the current is overlarge, an alternating current contactor K2 for disconnecting a pumping and inflating power supply when the gas outlet pressure of the nitrogen cylinder is overlarge or is overlarge and low, a buzzer A and a buzzer control switch K7 for giving out an overvoltage/pressure deficiency alarm, a total power supply switch SB1 for switching on an