A pressure testing device for a bag pulse jet valve

Abstract

The utility model discloses a cloth bag pulse injection valve pressure testing device, including cylindrical cavity pressure testing main body, the fixed pipe of through bottom wall and the sidewall flange of area fixed groove. When detecting, install injection valve in the cavity, start electromagnetic valve after inflating through the air pump, adjust to working air pressure, and the airflow passes through the cavity and goes out from the gas outlet after entering the valve body. Through observing the pressure gauge pointer change, can complete valve action performance test and leakproofness detection simultaneously. The device is high in degree of integration, and the single detection time is short, and the operation is simple, and is suitable for new valve in the factory and maintenance detection, realizes the whole life cycle quality control. The structure design is reasonable, and the detection is safe and reliable, has the advantages such as high efficiency, low cost.

Description

Technical Field

[0001] This utility model relates to the field of pulse jet valve testing technology, and in particular to a pressure testing device for a bag pulse jet valve. Background Technology

[0002] In industries such as coal chemical, power, and metallurgy, baghouse dust collectors are key devices for flue gas purification, and the stable operation of their core component, the pulse-jet solenoid valve, directly affects dust collection efficiency. Due to the frequent operation of pulse-jet solenoid valves, their failure rate is relatively high after long-term operation, mainly manifested as diaphragm damage, spring failure, and poor sealing, leading to a significant increase in maintenance workload. Currently, the industry lacks dedicated equipment for the maintenance and testing of pulse-jet valves, and the following methods are typically used:

[0003] Direct installation and testing: The repaired valve needs to be reinstalled in the dust removal system. Its sealing performance and operational reliability can only be verified when the process is running. If a fault is found, the system needs to be shut down again for replacement, which will affect the continuity of production.

[0004] Simple air tightness test: Some companies use manual ventilation test, but this method cannot simulate the pulse jet frequency and pressure under actual working conditions, and the test results are inaccurate.

[0005] The above-mentioned testing methods are not only inefficient, but also cannot ensure the quality of maintenance. There is an urgent need for an efficient and reliable pulse jet valve testing device. Summary of the Invention

[0006] Therefore, one objective of this utility model is to provide a pressure testing device for a bag pulse jet valve, so as to solve the problems mentioned in the background art and overcome the shortcomings of the prior art.

[0007] To achieve the above objectives, this utility model provides a pressure testing device for a bag filter pulse jet valve, comprising:

[0008] The pressure test body is a cylindrical cavity with an opening at one end, formed by side walls and bottom walls.

[0009] A fixed tube, which penetrates vertically through the bottom wall.

[0010] The sidewall extends outward from the end away from the bottom wall to form a flange.

[0011] Multiple fixing grooves are evenly distributed along the circumference of the cavity on the inner side of the side wall, and the fixing grooves cooperate with the pulse jet solenoid valve.

[0012] The side wall is provided with an air inlet. When the pulse jet solenoid valve is installed in the fixed slot, the outer wall of the cavity and the fixed tube together with the pulse jet solenoid valve form a test cavity.

[0013] Preferably, a sealing gasket is provided on the end of the fixing tube near the cavity.

[0014] In any of the above embodiments, it is preferred to further include a pipeline, a filter pressure reducing valve, and a shut-off valve. One end of the pipeline is connected to the air pump, and the other end of the pipeline is connected to the inflation port. The filter pressure reducing valve is located at the end of the connecting pipeline near the inflation port, and the shut-off valve is located at the end of the pipeline near the air pump.

[0015] In any of the above schemes, it is preferred that there are four fixing slots.

[0016] In any of the above embodiments, it is preferred that a plurality of fixing holes are evenly distributed on the flange along the circumferential direction of the cavity.

[0017] Compared with the prior art, the advantages and beneficial effects of this utility model are as follows:

[0018] This invention involves installing a pulse jet valve onto a cavity, opening the shut-off valve, charging the valve with an air pump, activating the solenoid coil on the pulse jet valve, and adjusting the filter pressure reducing valve to ensure the air supply reaches the working air source for the pulse jet valve. Airflow enters the pulse jet valve from the cavity and exits through its outlet. The valve's operation is determined by observing the pressure gauge readings on the filter pressure reducing valve. Closing the shut-off valve and observing the pressure gauge readings again determines if the valve is leaking. This invention enables rapid integrated verification of valve sealing and operational performance testing; significantly improves testing efficiency, drastically reducing testing time per valve; standardizes the testing process; simplifies operation; and effectively reduces labor costs. It has a wide range of applications, suitable for post-repair valve quality verification and new valve incoming inspection, achieving full lifecycle quality control. The device features a reasonable structural design, a safe and controllable testing process, and outstanding advantages such as ease of operation, accurate testing, and cost-effectiveness.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0021] Figure 1 This is a cross-sectional view of the pulse jet valve according to an embodiment of the present invention.

[0022] Figure 2 This is a schematic diagram of the structure of a pressure testing device for a bag pulse jet valve and its cooperation with the lower part of the valve body, according to an embodiment of this utility model.

[0023] Figure 3 This is a cross-sectional view of the testing device for a bag filter pulse jet valve and its cooperation with the lower part of the valve body, according to an embodiment of the present invention.

[0024] Figure 4 This is an exploded view of a pressure testing device for a bag pulse jet valve according to an embodiment of the present invention.

[0025] Figure 5 This is a structural diagram of the main body of a pressure testing device for a bag pulse jet valve according to an embodiment of the present invention.

[0026] Figure 6 This is a cross-sectional view of the pressure testing body in a pressure testing device for a bag pulse jet valve according to an embodiment of the present invention.

[0027] Figure 7 This is a structural diagram of the connection between the pipeline and the pressure testing body in a pressure testing device for a bag filter pulse jet valve according to an embodiment of this utility model.

[0028] Wherein: 1-Diaphragm; 2-Inlet; 3-Outlet; 4-Solenoid valve; 5-Iron core; 6-Spring; 7-Test pressure body; 8-Side wall; 9-Bottom wall; 10-Fixing tube; 11-Flange; 12-Fixing groove; 13-Inflation hole; 14-Sealing gasket; 15-Pipeline; 16-Filter pressure reducing valve; 17-Shut-off valve; 18-Air pump; 19-Lower part of valve body; 20-Test cavity; 21-Fixing hole. Detailed Implementation

[0029] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] like Figure 1As shown, this utility model embodiment can be applied to Shell bag filter pulse jet valve. This valve adopts the ASCO3 submerged type. Due to the high purchase cost of the entire valve, the initial maintenance was mainly repair. The repair mainly involved replacing the internal core components such as the diaphragm 1 and spring 6 of the pulse jet valve. After each repair, it was unknown whether the valve was leaking. There was no pressure testing device, and it could only wait for on-site fault inspection and testing. The repair time was long and it was not conducive to the operation of the bag filter dust collector.

[0032] The pulse jet valve includes a valve body, an electromagnetic assembly, and a diaphragm 1. The valve body has an air inlet 2 and an air outlet 3. The diaphragm 1 is located at the air inlet 2. The electromagnetic assembly includes a solenoid valve 4, an iron core 5, and a spring 6. The spring 6 is located inside the valve body, and the iron core 5 is located below the spring 6, passing through one end of the spring 6. The iron core 5 is connected to the diaphragm 1. The valve body includes a lower part 19 and an upper part, which cooperate to form the entire valve body. The upper part and lower part 19 are connected by bolts. When the solenoid valve 4 is charged, it attracts the iron core 5 to move upwards. The iron core 5 compresses the spring 6 and drives the diaphragm 1 to move. Working process:

[0033] (1) Standby state

[0034] Compressed air enters the valve body inlet 2, but the diaphragm 1 closes the nozzle under the force of the spring 6 and the air pressure, preventing airflow from passing through.

[0035] (2) Triggering phase

[0036] When the solenoid valve 4 is opened, the solenoid valve 4 attracts the iron core 5 to move upward. The iron core 5 compresses the spring 6 and drives the diaphragm 1 to move, releasing the air pressure above the diaphragm 1 and forming a pressure difference.

[0037] (3) Injection and blowing stage

[0038] Diaphragm 1 rises rapidly due to the pressure difference, and compressed air is injected at high speed from the valve body.

[0039] (4) Reset phase

[0040] When solenoid valve 4 closes, diaphragm 1 resets under the action of spring 6 and air pressure, and the blowing stops.

[0041] like Figures 2 to 6 As shown, a pressure testing device for a bag filter pulse jet valve according to an embodiment of the present invention includes:

[0042] The pressure test body 7 is a cylindrical cavity with an opening at one end, formed by the side wall 8 and the bottom wall 9.

[0043] Fixed pipe 10, fixed pipe 10 vertically penetrates the bottom wall 9.

[0044] The side wall 8 extends outward from the end away from the bottom wall 9 to form a flange 11.

[0045] Multiple fixing grooves 12 are evenly distributed along the circumference of the cavity on the inner side surface of the side wall 8. The fixing grooves 12 cooperate with the pulse jet solenoid valve 4.

[0046] The side wall 8 is provided with an air inlet 13. When the pulse jet solenoid valve 4 is installed in the fixed groove 12, the outer wall of the cavity and the fixed tube 10 together with the pulse jet solenoid valve 4 form a test cavity 20.

[0047] When the inflation port 13 is connected to the air pump 18, the test cavity 20 is a sealed cavity. The inlet of the pulse jet valve is located in the test cavity 20. The air pump 18 fills the test cavity 20 with airflow. The air inlet 2 of the pulse jet valve is located in the test cavity 20. There are four air inlets 2, which are evenly distributed around the body of the pulse jet valve. The air then enters the valve body of the pulse jet valve through the air inlet 2. The outer wall of the valve body of the pulse jet valve has raised ribs. The fixing groove 12 cooperates with the raised ribs. The fixing groove 12 is used to fix the pulse jet valve. The fixing tube 10 is connected to the bottom of the pulse jet valve to support the pulse jet valve. Multiple fixing holes 21 are provided on the flange 11. The pulse jet valve has a corresponding valve body flange. The valve body flange fits with the flange 11 on the side wall 8. After fitting together, the valve body flange and the flange 11 on the side wall 8 can be fixed with screws. At this time, the raised ribs are embedded in the fixing groove 12.

[0048] This invention involves installing a pulse jet valve on a cavity, opening the shut-off valve 17, charging the valve with air pump 18, activating the solenoid coil on the pulse jet valve, and adjusting the filter pressure reducing valve 16 to ensure the air supply reaches the working air source for the pulse jet valve. Airflow enters the pulse jet valve from the cavity and exits through the outlet 3. The pressure gauge on the filter pressure reducing valve 16 is observed to determine if the pulse jet valve is functioning correctly. Closing the shut-off valve 17 and observing the pressure gauge again determines if the pulse jet valve is leaking. This invention enables rapid integrated verification of valve sealing and operational performance testing; significantly improves testing efficiency, drastically reduces testing time per valve, standardizes the testing process, simplifies operation, and effectively reduces labor costs; it has a wide range of applications, suitable for post-repair valve quality verification and new valve incoming inspection, achieving full lifecycle quality control; the device has a reasonable structural design, a safe and controllable testing process, and outstanding advantages such as ease of operation, accurate testing, and economic practicality.

[0049] In a preferred embodiment, a sealing gasket 14 is provided on one end of the fixing tube 10 near the cavity. The fixing tube 10 is connected to the bottom of the pulse jet valve. The bottom of the pulse jet valve body is a circular tube. The outer diameter of the fixing tube 10 is smaller than the inner diameter of the bottom circular tube of the pulse jet valve body. The fixing tube 10 can be inserted into the circular tube. A boss is provided on the inner wall of the circular tube. The fixing tube 10 is inserted into the circular tube and cooperates with the boss inside the circular tube. The fixing tube 10 can support the body of the pulse jet valve. The fixing tube 10 is used to fix the bottom of the pulse jet valve, making it more stable. The sealing gasket 14 is provided at the connection between the fixing tube 10 and the pulse jet valve for sealing.

[0050] like Figure 7 As shown, in a preferred embodiment, the system further includes a pipeline 15, a filter pressure reducing valve 16, and a shut-off valve 17. One end of the pipeline 15 is connected to the air pump 18, and the other end is connected to the inflation port 13. The filter pressure reducing valve 16 is located at the end of the pipeline 15 near the inflation port 13, and the shut-off valve 17 is located at the end of the pipeline 15 near the air pump 18. The filter pressure reducing valve 16 includes a pressure gauge, and the air pressure in the pipeline 15 is adjusted by the filter pressure reducing valve 16 to reach the working air pressure of the blow valve. When the shut-off valve 17 is closed, a sealed space is formed inside the test cavity 20.

[0051] In a preferred embodiment, there are four fixing slots 12. The four fixing slots 12 are evenly distributed along the circumference of the cavity, and the fixing slots 12 cooperate with the protruding ribs on the pulse valve to fix the pulse valve. In this embodiment, the shape of the fixing slots 12 can be matched with the shape of the outer ribs of different pulse valves, and the cross-section of the fixing slots 12 can be square or semi-circular, etc.

[0052] In a preferred embodiment, a plurality of fixing holes 21 are evenly distributed on the flange 11 along the circumference of the cavity. Bolts are used to fix the pulse jet valve to the cavity through the fixing holes 21.

[0053] The working principle of this utility model is as follows: First, the pulse jet valve is placed into the cavity. The flange on the pulse jet valve body is connected to the flange on the test pressure body and fixed with bolts. The rib on the pulse jet valve body is fitted with the fixing groove, and the bottom of the pulse jet valve is fitted with the fixing pipe. The fixing pipe supports the bottom of the pulse jet valve. The air pump inflation and shut-off valves are opened, and air is injected into the test cavity through the pipeline. The test cavity is a closed cavity. The air inlet of the pulse jet valve is connected to the test cavity. The airflow enters from the air inlet of the pulse jet valve, enters the valve body of the pulse jet valve, and then flows out from the air outlet of the pulse jet valve. At the air outlet of the pulse jet valve, the solenoid valve in the pulse jet valve is opened, and the filter valve is adjusted to... When the air pressure in the pipeline reaches the working air pressure of the pulse jet valve, the change in the pressure gauge on the filter valve is observed to determine whether the pulse jet valve is working properly. The shut-off valve and air pump are closed. At this time, a sealed space is formed between the shut-off valve and the test cavity. Since no new airflow enters the body of the pulse jet valve, it remains closed. The air inlet of the pulse jet valve remains sealed. The change in the pressure gauge on the filter valve is observed. If the pressure measured by the pressure gauge remains constant, it proves that the pulse jet valve does not leak air. The pulse jet valve is then tested to see if it is qualified.

[0054] This invention is not only simple in structure but also practical. It enables efficient testing of repaired pulse valves, which can both inspect the quality of repairs and improve the efficiency of on-site repairs. It can also be used for incoming inspection of newly purchased pulse valves, saving labor and repair costs.

[0055] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0056] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions, and alterations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pressure testing device for a bag filter pulse jet valve, characterized in that, include: The pressure test body is a cylindrical cavity with an opening at one end, formed by side walls and bottom walls; A fixed tube, which penetrates vertically through the bottom wall; The sidewall extends outward from the end away from the bottom wall to form a flange; Multiple fixing grooves are evenly distributed on the inner surface of the sidewall along the circumferential direction of the cavity, and the fixing grooves cooperate with the pulse jet solenoid valve. The side wall is provided with an air inlet. When the pulse jet solenoid valve is installed in the fixing groove, the cavity, the outer wall of the fixing tube and the pulse jet solenoid valve together form a test cavity.

2. The pressure testing device for a bag filter pulse jet valve as described in claim 1, characterized in that, A sealing gasket is provided on one end of the fixed tube near the cavity.

3. The pressure testing device for a bag filter pulse jet valve as described in claim 1, characterized in that, It also includes a pipeline, a filter pressure reducing valve, and a shut-off valve. One end of the pipeline is connected to the air pump, and the other end of the pipeline is connected to the air inlet. The filter pressure reducing valve is located at the end of the pipeline near the air inlet, and the shut-off valve is located at the end of the pipeline near the air pump.

4. The pressure testing device for a bag filter pulse jet valve as described in claim 1, characterized in that, There are four fixing slots.

5. The pressure testing device for a bag filter pulse jet valve as described in claim 1, characterized in that, Multiple fixing holes are evenly distributed on the flange along the circumferential direction of the cavity.

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