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CN-121977675-A - Online calibration odorizing device and method based on gas monitoring

CN121977675ACN 121977675 ACN121977675 ACN 121977675ACN-121977675-A

Abstract

The invention provides an on-line calibration odorizing device and an on-line calibration odorizing method based on gas monitoring, and relates to the technical field of gas odorizing flow calibration. The structure realizes flow calibration of the specified odorizing pump under the condition that the gas odorizing process is not required to be interrupted by arranging the calibration passage and the working passage which are connected in parallel and utilizing the first distribution valve and the second distribution valve to switch. The magnetostrictive calibration meter in the calibration passage can accurately measure the flow, thereby calibrating the metering accuracy of the odorizing pump. The method ensures the continuity and stability of the gas odorization and improves the maintenance efficiency and the gas supply safety.

Inventors

  • LI SHIGUO

Assignees

  • 成都杰森输配设备实业有限公司

Dates

Publication Date
20260505
Application Date
20260113

Claims (10)

  1. 1. An on-line calibration odorizing device based on gas monitoring is characterized by comprising a liquid inlet pipe, An electric ball valve communicated with the liquid inlet pipe is arranged at the output end of the liquid inlet pipe, a first distribution valve is arranged at the output end of the electric ball valve, and a magnetostriction calibration meter is arranged between the output end of the electric ball valve and the first distribution valve; The outer side wall of the first distribution valve is circumferentially provided with a plurality of calibration liquid outlet pipes communicated with the first distribution valve, the output ends of the calibration liquid outlet pipes are respectively provided with diaphragm pumps communicated with the calibration liquid outlet pipes, and the output ends of the diaphragm pumps are respectively communicated with corresponding gas pipelines; the outer side wall of the liquid inlet pipe is provided with a second distribution valve communicated with the liquid inlet pipe, the outer side wall of the second distribution valve is circumferentially provided with a plurality of liquid inlet pipes communicated with the liquid inlet pipes, and the liquid inlet pipes are communicated with the input ends of the corresponding diaphragm pumps.
  2. 2. The on-line calibration odorizing device based on gas monitoring according to claim 1, wherein the first distribution valve comprises a first valve seat, a first installation cavity is formed in the first valve seat, a plurality of first access holes which are respectively communicated with a calibration drain pipe are formed in the outer side wall of the first valve seat in a surrounding mode, the first access holes are respectively communicated with the first installation cavity, a first conveying hole which is communicated with the electric ball valve is formed in the bottom of the first valve seat, a first ball seat is arranged in the first installation cavity in an inner rotating mode, a distribution cavity which is communicated with the first conveying hole is formed in the first ball seat in a partially embedded mode, a plurality of communication holes which are respectively communicated with the access holes are formed in the outer side wall of the first ball seat in a surrounding mode, the communication holes are respectively communicated with the distribution cavity, calibration channels are respectively arranged between any two adjacent communication holes, and the number of the calibration channels is odd.
  3. 3. The on-line calibration odorizing device based on gas monitoring according to claim 1 or 2, wherein the second distribution valve comprises a second valve seat, a second installation cavity is formed in the second valve seat, a plurality of second inlet and outlet holes are formed in the outer side wall of the second valve seat, the second inlet and outlet holes are respectively communicated with corresponding pump inlet liquid, a second ball seat is rotationally arranged in the second installation cavity, a second conveying hole communicated with the liquid inlet pipe is formed in the bottom of the second valve seat, a part of the second ball seat is embedded in the second conveying hole, a second pumping cavity communicated with the second conveying hole is formed in the second ball seat, a pumping hole communicated with the second inlet and outlet is formed in the outer side wall of the second ball seat, and the pumping hole is communicated with the distribution cavity.
  4. 4. The on-line calibration odorizing device based on gas monitoring according to claim 2, wherein the magnetostrictive calibration meter comprises a calibration tube, a conveying tube communicated with the output end of the electric ball valve is arranged on the calibration tube, a waveguide tube is arranged in the calibration tube along the extending direction of the conveying tube, two ends in the waveguide tube are fixed in the calibration tube, a floater is slidably arranged on the outer side wall of the waveguide tube, a detection coil for applying a magnetic field to the waveguide tube is arranged in the calibration tube, and a correction structure for straightening the waveguide tube is arranged in the calibration tube.
  5. 5. The on-line calibration odorizing device based on gas monitoring of claim 4, wherein the correction structure comprises a mounting frame mounted in the calibration pipe, the lower end of the waveguide tube penetrates through the mounting frame and then extends outwards, an external thread is arranged on the outer side wall of the lower end of the waveguide tube, a limiting ring meshed with the external thread is sleeved at the lower end of the waveguide tube, a blocking spring is sleeved at the lower end of the waveguide tube, one end of the blocking spring is abutted to the limiting ring, and the other end of the blocking spring is abutted to the mounting frame.
  6. 6. The on-line calibration and deodorization device based on gas monitoring as claimed in claim 4, wherein a liquid outlet pipe communicated with the liquid tightening pipe is arranged on the outer side of the calibration pipe.
  7. 7. The on-line calibration odorizing device based on gas monitoring of claim 2, wherein a first servo motor in transmission connection with the first ball seat is arranged on the outer side wall of the first valve seat.
  8. 8. The on-line calibration odorizing device based on gas monitoring of claim 3, wherein a second servo motor in transmission connection with the second ball seat is arranged on the outer side wall of the second valve seat.
  9. 9. The method for deodorizing the on-line calibration deodorizing device based on gas monitoring according to claim 4, wherein the outer side wall of the calibration tube is provided with graduation marks at equal intervals along the extending direction of the calibration tube.
  10. 10. An odorizing method based on an on-line calibration odorizing device based on gas monitoring as claimed in any one of claims 1-9, characterized by comprising the following steps: The odorizing liquid enters the odorizing pump and the second distributing valve respectively through the liquid inlet pipe; the second distributing valve directly distributes odorizing liquid to each pump liquid inlet pipe, and conveys the odorizing liquid to the corresponding diaphragm pump, and each diaphragm pump injects the odorizing liquid into a gas pipeline; the over-control system is used for switching the flow path of the first distribution valve corresponding to the diaphragm pump to be calibrated to be communicated with the diaphragm pump and controlling the second distribution valve to cut off direct liquid supply to the diaphragm pump; The odorizing liquid is pressurized by the odorizing pump, metered by the magnetostrictive calibration meter, and then conveyed to a diaphragm pump to be calibrated by the first distribution valve and the corresponding calibration liquid outlet pipe; After the calibration is completed, the first distributing valve and the second distributing valve are switched, so that the calibrated diaphragm pump resumes to be directly supplied with liquid by the second distributing valve.

Description

Online calibration odorizing device and method based on gas monitoring Technical Field The invention relates to the technical field of gas odorizing flow calibration, in particular to an online calibration odorizing device and an online calibration odorizing method based on gas monitoring. Background The gas odorization is a vital safety procedure in town gas transportation and distribution, and can provide obvious warning smell when the gas leaks by injecting a trace amount of odorizing agent (such as tetrahydrothiophene) into colorless odorless gas. The core equipment of the odorizing is an odorizing pump, and the accuracy and the stability of the adding amount of the odorizing pump are directly related to the effectiveness and the economy of early warning. Therefore, the flow calibration of the odorizing pump is carried out regularly to verify and maintain the metering accuracy, and the odorizing pump is an indispensable maintenance work in gas operation. At present, the calibration of the odorizing pump in the industry mainly faces the following technical dilemma: The off-line calibration mode is the main stream, and causes shortage of the gas supply safety window period, and the traditional method needs to detach the calibrated pump from the production line and send the calibrated pump to a laboratory or use a portable calibration device for testing. The process is complex in operation, and the gas pipeline in charge of the pump is forced to completely stop odorizing, so that a 'safe blank period' of gas delivery is formed. This constitutes a potential safety risk for gas networks that need to run continuously, and maintenance operations must be carefully scheduled in low peak hours with minimal flexibility. The on-line calibration is difficult to realize, and the contradiction between the continuous operation and the accurate calibration of the system is outstanding, so that in order to avoid the shutdown, some schemes try to perform the on-line calibration, namely, the measurement is performed in the state that the pump is not stopped. However, the existing online method often faces the dilemma that if the calibration device is simply connected in series to the main flow, the odorizing agent can flow into the gas pipeline after passing through the calibration unit during the calibration, the calibration process is the production process, once the calibration operation itself (such as switching and adjusting) introduces flow fluctuation, the odorizing precision in the current period is directly affected, and the 'undisturbed' calibration cannot be realized. If isolation calibration is needed, the prior system lacks a reliable means for accurately switching a single pump to be tested into an independent calibration loop on the premise of not influencing the normal operation of other parallel pump sets. Moreover, the calibration precision is affected by working conditions, the deviation exists between the offline data and the actual operation, namely the offline calibration environment (such as temperature, pressure and medium viscosity) and the actual operation working conditions exist, so that the calibration result cannot completely and truly reflect the working performance of the pump under the actual pipe network condition, and the reliability and the guiding significance of the calibration are reduced. Disclosure of Invention The invention aims to provide an on-line calibration odorizing device based on gas monitoring, which can solve the problems of the background technology aiming at the defects of the prior art. The technical scheme of the invention is realized as follows: the invention provides an online calibration odorizing device based on gas monitoring, which comprises a liquid inlet pipe; An electric ball valve communicated with the liquid inlet pipe is arranged at the output end of the liquid inlet pipe, a first distribution valve is arranged at the output end of the electric ball valve, and a magnetostriction calibration meter is arranged between the output end of the electric ball valve and the first distribution valve; The outer side wall of the first distribution valve is circumferentially provided with a plurality of calibration liquid outlet pipes communicated with the first distribution valve, the output ends of the calibration liquid outlet pipes are respectively provided with diaphragm pumps communicated with the calibration liquid outlet pipes, and the output ends of the diaphragm pumps are respectively communicated with corresponding gas pipelines; The outer side wall of the liquid inlet pipe is provided with a second distribution valve communicated with the liquid inlet pipe, the outer side wall of the second distribution valve is provided with a plurality of liquid inlet pumping pipes communicated with the liquid inlet pipe in a surrounding mode, and the liquid inlet pumping pipes are communicated with the input ends of the corresponding diaphragm pumps. In some technical sc