Pulse injection electromagnetic valve and partial pressure gas package working condition detection method

Abstract

The present application relates to pulse injection electromagnetic valve and partial pressure gas bag working condition detection method, including the following steps: 1) compressed air source pressure regulation detection, 2) pulse injection partial pressure gas bag leakage detection, 3) pulse injection electromagnetic valve leakage detection, 4) pulse injection partial pressure gas bag other position manual detection, the pulse injection electromagnetic valve and partial pressure gas bag working condition detection method, respectively, detect the compressed air source pressure value P0 and the pressure value (P1-P X ) of pulse injection partial pressure gas bag, and compare to determine whether there is pulse injection partial pressure gas bag leakage, then detect the negative pressure value (△P1-△P N ) of each pulse injection pipe connected detection branch through the differential pressure transmitter on the main pipe, to determine whether the pulse injection electromagnetic valve connected to the pulse injection partial pressure gas bag is leaking, to detect the leakage of pulse injection electromagnetic valve and pulse injection partial pressure gas bag in real time, to solve the leakage problem in time, and to ensure the normal and stable operation of the pulse injection system.

Description

TECHNICAL FIELD

[0001] The present application relates to pulse jet dust removal equipment, in particular to a pulse jet electromagnetic valve and a pressure division gas pocket working condition detection method. BACKGROUND

[0002] The pulse jet cloth bag type (filter cartridge type) dust collector has been widely used in coal-fired power generation, metallurgy and other production fields. The pulse jet cloth bag type dust collector is used to filter and purify flue gas through cloth bags to ensure that the flue gas after purification meets the emission standard.

[0003] The pulse jet cloth bag type (filter cartridge type) dust collector is a physical filtration and purification device. After a period of use, the filter material accumulates a layer of dust on its surface due to screening, collision, retention, diffusion and electrostatic effects. This layer of dust is called the primary layer. During the subsequent movement process, the primary layer becomes the main filter layer of the filter material. By relying on the action of the primary layer, even the filter material with larger mesh can achieve high filtration efficiency. As dust accumulates on the surface of the filter material, the efficiency and resistance of the pulse jet cloth bag type (filter cartridge type) dust collector increase accordingly. When the pressure difference between the two sides of the filter material is large, some fine dust particles that have adhered to the filter material will be squeezed out, causing the efficiency of the pulse jet cloth bag type (filter cartridge type) dust collector to decrease. In addition, if the resistance of the pulse jet cloth bag type (filter cartridge type) dust collector is too high, the air volume of the dust removal system will decrease significantly. Therefore, the resistance of the pulse jet cloth bag type (filter cartridge type) dust collector should be cleaned in time when it reaches a certain value.

[0004] The electromagnetic pulse valve and the pressure division gas pocket are core components in the pulse jet cloth bag type (filter cartridge type) dust collector cleaning system. Whether they work normally directly affects the cleaning effect and continuous working ability of the cleaning system. It is particularly important to detect the running status of the valve, especially the opening state, closing state and opening and closing speed state of the valve during the operation of the electromagnetic pulse valve. This can ensure that the electromagnetic pulse valve works in good working conditions and effectively improves the working performance and service life of the electromagnetic pulse valve.

[0005] In addition, as the number of electromagnetic pulse valves and pressure division gas pockets increases significantly with the large-scale development of the pulse jet cloth bag type (filter cartridge type) dust collector, the sequence of the electromagnetic pulse valves is usually not arranged in natural order, but in a "jumping" and "discrete" manner. The electromagnetic pulse valves for adjacent two times of blowing are often far apart, making it difficult to artificially perceive the blowing situation of each electromagnetic pulse valve.

[0006] Since the pulse jet bag (filter cartridge) dust collector was invented, the fault detection of the electromagnetic pulse valve and the pressure reduction gas bag mainly relies on manual inspection. If an electromagnetic pulse valve or a pressure reduction gas bag fails, it may cause unstable operation of the pulse jet bag (filter cartridge) dust collector and unnecessary economic losses. However, it is a heavy task to check each electromagnetic pulse valve and pressure reduction gas bag one by one, which not only consumes time and effort, but also cannot find the fault electromagnetic pulse valve and pressure reduction gas bag in time, thereby affecting the dust removal effect of the pulse jet bag (filter cartridge) dust collector and wasting a large amount of energy. Therefore, in order to ensure the normal operation of the pulse jet bag (filter cartridge) dust collector and realize the energy saving and consumption reduction of the dust removal system, it is extremely important to find and handle the fault electromagnetic pulse valve or the leaking pressure reduction gas bag in time among numerous electromagnetic pulse valves and pressure reduction gas bags, and it is urgent to develop a working condition real-time detection device for the electromagnetic pulse valve and the pressure reduction gas bag. SUMMARY

[0007] In view of the above-mentioned defects of the prior art, the purpose of the present application is to provide a pulse jet electromagnetic valve and pressure reduction gas bag working condition detection method to solve one or more problems in the prior art.

[0008] To achieve the above-mentioned purpose, the technical solution of the present application is as follows:

[0009] The pulse jet electromagnetic valve and pressure reduction gas bag working condition detection method comprises the following steps:

[0010] 1) compressed air source pressure regulation detection: detecting the compressed air source pressure value P0 of the compressed air storage tank through the air source pressure transmitter;

[0011] 2) pulse jet pressure reduction gas bag leakage detection: detecting the pressure value (P1-P X ) of each pulse jet pressure reduction gas bag through the pressure reduction gas bag pressure transmitter;

[0012] If P0=P1-P X , it can be determined that each pulse jet pressure reduction gas bag and pulse jet electromagnetic valve is not leaking; if P0>P1-P X , the pulse jet pressure reduction gas bag or the corresponding pulse jet electromagnetic valve with lower pressure value has a leakage problem;

[0013] 3) pulse jet electromagnetic valve leakage detection: the pulse jet pressure reduction gas bag is connected to the pulse jet pipe, the pulse jet pipe is connected to the pulse jet electromagnetic valve, and the pulse jet pipe is inserted into the detection branch pipe close to the pulse jet electromagnetic valve, the detection branch pipe is connected to the branch pipe electromagnetic valve, and the detection branch pipe is connected to the detection main pipe, and the detection main pipe is connected to the differential pressure transmitter;

[0014] For the above-mentioned pulse injection sub-pressure gas package with gas leakage problem, it is necessary to detect whether the pulse injection solenoid valve connected thereto leaks. The pulse injection solenoid valves are sequentially started, pulse injection is carried out through the pulse injection pipe, and the branch solenoid valves connected to the detection branch pipes of the corresponding pulse injection pipes are started. By using the principle of jet pumping, when there is airflow flowing through the detection branch pipe in the pulse injection pipe, a certain negative pressure will be formed in the detection branch pipe under the action of the airflow, and the negative pressure values (△P1-△P N ) of each detection branch pipe are detected by the differential pressure transmitter on the detection main pipe.

[0015] If the negative pressure value of a detection branch pipe is lower than that of other detection branch pipes, it can be determined that the pulse injection solenoid valve connected to the pulse injection pipe corresponding to the detection branch pipe has a gas leakage problem.

[0016] If the negative pressure values (△P1-△P N ) of all detection branch pipes of the pulse injection sub-pressure gas package are lower than the average negative pressure values of the detection branch pipes of other groups of pulse injection sub-pressure gas packages, it can be determined that all pulse injection solenoid valves installed on the pulse injection sub-pressure gas package of the group have a gas leakage problem.

[0017] If the negative pressure values (△P1-△P N ) of all detection branch pipes of the pulse injection sub-pressure gas package are basically consistent and consistent with the average values of the negative pressure values of all detection branch pipes of other groups of pulse injection sub-pressure gas packages, it can be determined that all pulse injection solenoid valves connected to the pulse injection sub-pressure gas package being detected do not have a gas leakage problem.

[0018] 4) Artificial detection of other positions of the pulse injection sub-pressure gas package: When all pulse injection solenoid valves do not have a gas leakage problem, it indicates that there is a gas leakage in other interface positions or other connected pipelines of the pulse injection sub-pressure gas package, which needs to be confirmed by artificial detection.

[0019] As a further improvement of the above technical solution:

[0020] The compressed air storage tank is connected to an air inlet main pipe, the air inlet main pipe is connected to a plurality of groups of pulse injection sub-pressure gas packages through a plurality of air inlet branch pipes, an air source pressure transmitter is connected to the air inlet main pipe, a sub-pressure gas package pressure transmitter is connected to the air inlet branch pipe, and a gas source pressure regulating valve for regulating the compressed air source pressure P0 is connected to the air inlet main pipe.

[0021] A check valve is connected to the air inlet branch pipe.

[0022] If the difference between the pressure values (P1-P X ) of the pulse injection sub-pressure gas package and the compressed air source pressure value P0 exceeds 3%, it can be determined that the group of pulse injection sub-pressure gas packages or the corresponding connected pulse injection solenoid valve has a gas leakage problem.

[0023] If the negative pressure value of one detection branch pipe in one set of pulse blowing sub-pressure gas package is lower than the negative pressure value of other detection branch pipes by more than 1%, it can be judged that the pulse blowing electromagnetic valve connected to the pulse blowing pipe exists a gas leakage problem.

[0024] If the negative pressure values (△P1-△P N ) of all detection branch pipes in one set of pulse blowing sub-pressure gas package are lower than the average value of the negative pressure values (△P1-△P N ) of all detection branch pipes in other sets of pulse blowing sub-pressure gas package by within 1%, it can be judged that all pulse blowing electromagnetic valves in the set of pulse blowing sub-pressure gas package do not exist a gas leakage problem.

[0025] The diameter of the detection branch pipe ranges from 8 to 10 mm.

[0026] The length of the detection branch pipe inserted into the pulse blowing pipe ranges from 20 to 30 mm.

[0027] The pulse blowing electromagnetic valve is connected to the DCS control system through a first electromagnetic valve control box, the branch pipe electromagnetic valve is connected to the DCS control system through a second electromagnetic valve control box, and the gas source pressure transmitter, the sub-pressure gas package pressure transmitter and the differential pressure transmitter are connected to the DCS control system through input and output ports.

[0028] Compared with the prior art, the beneficial technical effects of the present application are as follows:

[0029] 1) The pulse blowing electromagnetic valve and sub-pressure gas package working condition detection method detects the compressed air source pressure and the pressure of the pulse blowing sub-pressure gas package through the gas source pressure transmitter and the sub-pressure gas package pressure transmitter, so as to detect whether there is a gas leakage in the pulse blowing sub-pressure gas package. For the pulse blowing sub-pressure gas package with gas leakage, the pulse blowing electromagnetic valve connected thereto can be started in turn, and the branch pipe electromagnetic valve connected to the detection branch pipe of the corresponding pulse blowing pipe is opened. According to the principle of jet entrainment, when the airflow in the pulse blowing pipe rapidly flows through the detection branch pipe, a certain negative pressure will be formed in the detection branch pipe under the action of the airflow. With the increase of the airflow flowing speed in the blowing pipe and the airflow flowing through the pipe, the negative pressure formed in the detection branch pipe will also increase. The gas negative pressure can be detected by the differential pressure transmitter. By comparing the data with the data of the differential pressure transmitter of other pulse blowing sub-pressure gas packages without gas leakage, it can be detected whether the pulse blowing electromagnetic valve exists a gas leakage. If the detection is not the gas leakage of the pulse blowing electromagnetic valve, it means that the gas leakage is in other parts of the pulse blowing sub-pressure gas package or the gas inlet branch pipe. The pulse blowing sub-pressure gas package and the gas inlet branch pipe only need to be manually detected, so that the gas leakage problems of the pulse blowing electromagnetic valve and the pulse blowing sub-pressure gas package can be detected in real time, the gas leakage problem can be solved in time, and the normal and stable operation of the pulse blowing system can be ensured.

[0030] 2) The air source pressure regulating valve is connected to the main air inlet pipe, which can adjust the pressure of the compressed air source;

[0031] 3) The check valve is connected to the air inlet branch pipe, which can prevent the compressed air in the pulse injection sub-pressure gas bag from leaking from the air inlet branch pipe, ensuring that the pulse injection sub-pressure gas bags do not interfere with each other;

[0032] 4) The pulse injection solenoid valve, air source pressure transmitter, sub-pressure gas bag pressure transmitter, branch pipe solenoid valve, and differential pressure transmitter are electrically connected to the DCS control system, which can detect whether the pulse injection solenoid valve and the pulse injection sub-pressure gas bag have air leakage problems in real time. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 The connection schematic diagram of the pulse injection solenoid valve and sub-pressure gas bag working condition detection method of the present embodiment is shown.

[0034] Figure 2 The connection schematic diagram of the pulse injection pipe and detection branch pipe of the pulse injection solenoid valve and sub-pressure gas bag working condition detection method of the present embodiment is shown.

[0035] Markings in the drawings:

[0036] 1, compressed air storage tank; 2, main air inlet pipe; 21, air source pressure transmitter; 22, air source pressure regulating valve; 3, air inlet branch pipe; 31, sub-pressure gas bag pressure transmitter; 32, check valve; 4, pulse injection sub-pressure gas bag; 41, blowdown pipe; 42, blowdown valve; 5, pulse injection pipe; 6, pulse injection solenoid valve; 7, detection branch pipe; 71, branch pipe solenoid valve; 8, detection main pipe; 81, differential pressure transmitter; 9, DCS control system; 91, first solenoid valve control box; 92, second solenoid valve control box; 93, input and output port. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme and advantages of the present application more clear, the device of the present application is further described in detail below in combination with the drawings and specific embodiments. The advantages and features of the present application will be more clear according to the following description. It should be noted that the drawings are greatly simplified and all use non-precise proportions, only for the purpose of facilitating and clarifying the description of the embodiments of the present application. In order to make the purpose, features and advantages of the present application more obvious and easy to understand, please refer to the drawings. It should be noted that the structure, proportion, size and the like shown in the drawings of the present application are only used to cooperate with the content disclosed in the description, so that those skilled in the art can understand and read, and are not used to limit the conditions for implementing the present application, so they do not have substantial technical significance. Any modification of structure, change of proportion relationship or adjustment of size, which does not affect the effect and purpose that can be achieved by the present application, should fall within the scope of the technical content disclosed by the present application.

[0038] As shown in Figure 1 , Figure 2 The working condition detection device of the electromagnetic valve and the pressure reducing bag of the present embodiment includes a compressed air storage tank 1, the compressed air storage tank 1 is connected to a plurality of pulse injection pressure reducing gas bags 4 through an air inlet main pipe 2 and an air inlet branch pipe 3, the pulse injection pressure reducing gas bags 4 are connected to a plurality of pulse injection pipes 5, the pulse injection pipes 5 are all connected to pulse injection electromagnetic valves 6, the air inlet main pipe 2 is connected to an air source pressure transmitter 21 at the end close to the compressed air storage tank 1, the air inlet branch pipe 3 is connected to a pressure bag pressure transmitter 31 at the end close to the pulse injection pressure reducing gas bag 4, the pulse injection pipe 5 is inserted into a detection branch pipe 7 at one side of the end close to the pulse injection electromagnetic valve 6, the diameter of the detection branch pipe 7 is in the range of 8-10 mm, the length of the detection branch pipe 7 inserted into the pulse injection pipe 5 is in the range of 20-30 mm, the detection branch pipe 7 is connected to a branch pipe electromagnetic valve 71, the detection branch pipe 7 is connected to a detection main pipe 8, and the detection main pipe 8 is connected to a differential pressure transmitter 81.

[0039] The air inlet main pipe 2 is connected to an air source pressure regulating valve 22, which can adjust the pressure of the compressed air source.

[0040] The compressed air storage tank 1 is connected to a compressed air inlet pipe for inputting compressed air.

[0041] The air inlet branch pipe 3 is connected to a check valve 32, which can prevent the compressed air in the pulse injection pressure reducing gas bag 4 from leaking from the air inlet branch pipe 3, so as to ensure that the pulse injection pressure reducing gas bags 4 do not interfere with each other.

[0042] The pulse injection pressure reducing gas bag 4 is connected to a blowdown pipe 41, and the blowdown pipe 41 is connected to a blowdown valve 42, which facilitates the blowdown of the pulse injection pressure reducing gas bag 4.

[0043] The pulse injection electromagnetic valve 6 is connected to the DCS control system 9 through the first electromagnetic valve control box 91, the branch electromagnetic valve 71 is connected to the DCS control system 9 through the second electromagnetic valve control box 92, the air source pressure transmitter 21, the partial pressure air bag pressure transmitter 31 and the differential pressure transmitter 81 are connected to the DCS control system 9 through the input and output port 93.

[0044] The pulse injection electromagnetic valve and the partial pressure air bag working condition detection method of the embodiment are used as follows:

[0045] 1) compressed air source pressure regulation detection: the pressure of the compressed air source can be adjusted through the air source pressure regulating valve 22, the compressed air source pressure value P0 of the compressed air tank is detected through the air source pressure transmitter 21, and the compressed air source pressure value P0 is transmitted to the DCS control system 9 through the input and output port 93;

[0046] 2) pulse injection partial pressure air bag leakage detection: the pressure value (P1-P X ) of each pulse injection partial pressure air bag 4 can be detected through the partial pressure air bag pressure transmitter 31, and the pressure value (P1-P X ) of the pulse injection partial pressure air bag 4 is transmitted to the DCS control system 9 through the input and output port 93;

[0047] The DCS control system 9 automatically compares the pressure value (P1-P X ) of each pulse injection partial pressure air bag 4 with the compressed air source pressure value P0, if P0=P1-P X , it can be determined that each pulse injection partial pressure air bag 4 and the pulse injection electromagnetic valve 6 do not leak, if P0>P1-P X , and the difference between the pressure value (P1-P X ) of the pulse injection partial pressure air bag 4 and the compressed air source pressure value P0 exceeds 3%, it can be determined that there is a leakage problem in the pulse injection partial pressure air bag 4 or the corresponding connected pulse injection electromagnetic valve 6;

[0048] 3) pulse injection electromagnetic valve leakage detection: for the pulse injection partial pressure air bag 4 detected to have a leakage problem, it is necessary to detect whether the pulse injection electromagnetic valve 6 connected thereto leaks, the pulse injection electromagnetic valve 6 is started in sequence through the DCS control system 9 cooperating with the first electromagnetic valve control box 91, pulse injection is performed through the pulse injection pipe 5, at the same time, the branch electromagnetic valve 71 on the detection branch pipe 7 connected to the corresponding pulse injection pipe 5 is started through the DCS control system 9 cooperating with the second electromagnetic valve control box 92, and the jet suction principle is used, when the airflow in the pulse injection pipe 5 rapidly flows through the detection branch pipe 7, a certain negative pressure is formed in the detection branch pipe 7 under the action of the airflow, and the negative pressure value (△P1-△PN ), and the negative pressure values (△P1-△P N ) of the detection branch pipes 7 are transmitted to the DCS control system 9 through the input and output port 93;

[0049] When the negative pressure values of some detection branch pipes 7 in a group of pulse blowing sub-pressure gas packages 4 are lower than those of other detection branch pipes 7 by more than 1%, it can be judged that the pulse blowing electromagnetic valves 6 connected to the pulse blowing pipes 5 corresponding to the detection branch pipes 7 have air leakage problems;

[0050] When the negative pressure values (△P1-△P N ) of all the detection branch pipes 7 in the pulse blowing sub-pressure gas package 4 to be detected are lower than the average values of the negative pressure values (△P1-△P N ) of all the detection branch pipes 7 in other groups of pulse blowing sub-pressure gas packages 4 by more than 1%, it can be judged that the pulse blowing electromagnetic valves 6 installed on the group of pulse blowing sub-pressure gas packages 4 all have air leakage problems;

[0051] When the negative pressure values (△P1-△P N ) of all the detection branch pipes 7 on the pulse blowing sub-pressure gas package 4 are basically consistent, and are consistent with the average values of the negative pressure values of all the detection branch pipes 7 on other groups of pulse blowing sub-pressure gas packages 4 (when the negative pressure values (△P1-△P N ) of all the detection branch pipes 7 in the pulse blowing sub-pressure gas package 4 to be detected are lower than the average values of the negative pressure values (△P1-△P N ) of all the detection branch pipes 7 in other groups of pulse blowing sub-pressure gas packages 4 by less than 1%), it can be judged that the pulse blowing electromagnetic valves 6 connected to the pulse blowing sub-pressure gas package 4 to be detected all do not have air leakage problems;

[0052] 4) Artificial detection of other positions of the pulse blowing sub-pressure gas package: when the pulse blowing electromagnetic valves 6 all do not have air leakage problems, it indicates that there is air leakage in other interface positions or other connected pipelines of the pulse blowing sub-pressure gas package 4, which needs to be confirmed by artificial detection.

[0053] The technical features of the above-described embodiments can be combined in any manner. In order to make the description simple, all possible combinations of the technical features in the above-described embodiments are not described, but as long as the combinations of the technical features do not conflict, they should be considered as the scope of the present disclosure.

[0054] The above-described embodiments only express several implementation manners of the present disclosure, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be pointed out that for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present disclosure, and these should be within the protection scope of the present disclosure. Therefore, the protection scope of the patent of the present disclosure should be subject to the appended claims.

Claims

1. Pulse injection electromagnetic valve and partial pressure gas bag working condition detection method, comprising the following steps: 1) compressed air source pressure regulation detection: detect the compressed air source pressure value P0 of the compressed air tank through the air source pressure transmitter; 2) Pulse injection sub-pressure gas pocket leakage detection: the pressure value (P1~P X ) of each pulse injection sub-pressure gas pocket is detected by a sub-pressure gas pocket pressure transmitter. If P0 = P1 ~ P X , it can be determined that there is no leakage in each group of pulse injection sub-pressure gas pocket and pulse injection solenoid valve; if P0 > P1 ~ P X , the group of pulse injection sub-pressure gas pocket or the corresponding pulse injection solenoid valve with lower pressure value has a leakage problem; 3) pulse injection electromagnetic valve leakage detection: the pulse injection partial pressure gas bag is connected to the pulse injection pipe, the pulse injection pipe is connected to the pulse injection electromagnetic valve, and the pulse injection pipe is inserted into the detection branch pipe on the side close to the pulse injection electromagnetic valve, the detection branch pipe is connected to the branch pipe electromagnetic valve, and the detection branch pipe is connected to the detection main pipe, and the detection main pipe is connected to the differential pressure transmitter; For the pulse injection sub-pressure gas pocket detected to have a gas leakage problem, it is necessary to first detect whether the pulse injection solenoid valve connected thereon leaks. The pulse injection solenoid valves are sequentially started in order, pulse injection is performed through the pulse injection pipe, and the branch solenoid valves on the detection branch pipes connected with the corresponding pulse injection pipes are started. By using the jet suction principle, when there is airflow flowing rapidly through the detection branch pipe in the pulse injection pipe, a certain negative pressure will be formed in the detection branch pipe under the action of the airflow, and the negative pressure values (△P1-△P N ) of each detection branch pipe are detected through the differential pressure transmitter on the detection main pipe. Wherein the negative pressure value of the detection branch pipe is lower than that of the other detection branch pipes, it can be judged that the pulse injection electromagnetic valve connected to the pulse injection pipe corresponding to the detection branch pipe has a leakage problem; The pulse injection divides all detection branch pipes on the pressure bag (△P1~△P N ) and the negative pressure average value of other pulse injection pressure bag is low, which can be judged as the pulse injection electromagnetic valve installed on the pulse injection pressure bag has air leakage problem. The pulse injection divides all detection branch pipes on the pressure bag and the negative pressure value (△P1~△P N ) is basically consistent, and the average value of the negative pressure value of all detection branch pipes on the pulse injection pressure bag of other groups is consistent, which can determine that the pulse injection electromagnetic valve connected on the pulse injection pressure bag of the detected pulse injection pressure bag does not exist leakage problem; 4) manual detection of other positions of the pulse injection partial pressure gas bag: when there is no leakage problem in the pulse injection electromagnetic valve, it means that there is a leakage in the other interface positions or other connected pipelines of the pulse injection partial pressure gas bag, which needs to be manually detected and confirmed.

2. The pulse injection electromagnetic valve and pressure gas pocket condition detection method according to claim 1, characterized by: The compressed air tank is connected to the inlet main pipe, the inlet main pipe is connected to a plurality of pulse injection partial pressure gas bags through a plurality of inlet branch pipes, the air source pressure transmitter is connected to the inlet main pipe, the partial pressure gas bag pressure transmitter is connected to the inlet branch pipe, and the inlet main pipe is connected to the air source pressure regulating valve for regulating the compressed air source pressure P0.

3. The pulse injection electromagnetic valve and pressure gas pocket condition detection method according to claim 2, characterized by: The inlet branch pipe is connected to a check valve.

4. The pulse injection electromagnetic valve and partial pressure gas pocket working condition detection method of claim 1, wherein: The difference between the pressure value (P1~P X ) of the pulse injection sub-pressure gas pocket and the pressure value P0 of the compressed air source exceeds 3%, which can determine that the pulse injection sub-pressure gas pocket or the corresponding connected pulse injection electromagnetic valve has a gas leakage problem.

5. The pulse injection electromagnetic valve and partial pressure gas pocket working condition detection method of claim 1, wherein: If the negative pressure value of one of the detection branch pipes in a group of pulse injection partial pressure gas bags is more than 1% lower than that of the other detection branch pipes, it can be judged that the pulse injection electromagnetic valve connected to the pulse injection pipe corresponding to the detection branch pipe has a leakage problem.

6. The pulse injection solenoid valve and pressure-break gas pocket condition detection method of claim 1, wherein: A group of pulse injection sub-pressure gas pockets all the detection branch negative pressure value (△P1~△P N ) relative to the average value of the negative pressure value of all the detection branch of the other group of pulse injection sub-pressure gas pockets within 1% lower, can be judged that all the pulse injection solenoid valves in the group of pulse injection sub-pressure gas pockets do not have air leakage problem.

7. The pulse injection solenoid valve and pressure-break gas pocket condition detection method of claim 1, wherein: The diameter of the detection branch pipe is 8-10 mm.

8. The pulse injection electromagnetic valve and pressure gas pocket condition detection method according to claim 6, characterized by: The length of the detection branch pipe inserted into the pulse injection pipe is 20-30 mm.

9. The pulse injection solenoid valve and partial pressure gas pocket condition detection method according to claim 1, characterized by: The pulse injection electromagnetic valve is connected to the DCS control system through the first electromagnetic valve control box, the branch pipe electromagnetic valve is connected to the DCS control system through the second electromagnetic valve control box, and the air source pressure transmitter, the partial pressure gas bag pressure transmitter and the differential pressure transmitter are connected to the DCS control system through the input and output ports.

Images