A kind of fault detection device for bag filter

Abstract

The present invention provides a fault detection device for a bag filter, which relates to the technical field of detection devices. The detection device body includes a detection box, a top sealing component, a switching mechanism and a pressure detection component. A sealing flange is welded on one side of the detection box, an air intake pipe is inserted into the interior of the sealing flange, and a pressure pump is connected to the other end of the air intake pipe. A placement port is provided on the top of the detection box, and a top sealing component is filled inside the placement port. The sealing detection device drives the pressure detection component through the switching mechanism to be connected with one end of the exhaust port of the bypass valve body to be tested or the interior of the detection box for detection. Through the switching and airflow guide structure, the sealing detection can be performed on the two chambers at the top and bottom of the valve core inside the bypass valve body, respectively, thereby providing a more accurate leakage location. At the same time, the sealing self-test function of the interior of the detection box itself is also realized.

Description

Technical Field

[0001] The invention relates to the technical field of detection devices, and in particular to a fault detection device for a bag filter. Background Art

[0002] The main function of the bag filter bypass valve is to protect the dust collector under certain conditions and ensure the safe operation of the flue gas treatment system. The bypass valve is set to quickly switch the flow path of the flue gas when the bag filter encounters certain conditions, protecting the dust collector and related equipment from damage. Therefore, the sealing of the bypass valve is the key to its normal operation. Therefore, it is necessary to regularly test the sealing of the bypass valve.

[0003] In the prior art, the sealing detection equipment used for the bypass valve of the bag collector directly places the bypass valve inside the sealed box and closes the outlet section, and then fills the bypass valve with high-pressure air from the air inlet section. The sealing state of the bypass valve can be determined by detecting whether the pressure inside the box is stable based on the pressure gauge built into the box. However, this scheme can only determine whether there is a leakage inside the bypass valve as a whole. Since the opening and closing of the bypass valve is generally controlled by a liftable valve core, two chambers will be formed inside the bypass valve due to the blocking of the valve core in the closed state. However, the above-mentioned prior art cannot further determine the specific chamber position of the bypass valve to be tested that is leaking, so the detection accuracy is insufficient. On the other hand, when the detection device itself leaks, the pressure gauge will also be unable to detect whether there is a leakage problem in the bypass valve body, so it lacks an effective self-test function. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a bag filter fault detection device to solve the problems raised in the above background technology. The present invention drives the pressure detection component through the switching mechanism to connect with one end of the bypass valve body exhaust port to be tested or the inside of the detection box for detection. Through the switching and airflow guide structure, the two chambers at the top and bottom of the valve core inside the bypass valve body can be tested for sealing, thereby providing a more accurate leakage location. At the same time, the self-test function of the sealing inside the detection box itself is also realized.

[0005] In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical scheme: a bag dust collector fault detection device, comprising a detection device body and a bypass valve body, the detection device body comprising a detection box, a top sealing assembly, a switching mechanism and a pressure detection assembly, a sealing flange is welded on one side of the detection box, an air intake pipe is inserted into the interior of the sealing flange, and a pressure pump is connected to the other end of the air intake pipe, a placement port is opened on the top of the detection box, the interior of the placement port is filled with a top sealing assembly, the bypass valve body is placed into the interior of the detection box from the placement port, a switching mechanism is inserted on the other side of the detection box, a pressure detection assembly is inserted into the interior of the switching mechanism, a pressure gauge is screwed on the end of the pressure detection assembly, and an inner sealing ring and an outer sealing ring are respectively integrated at both ends of the switching mechanism, and the inner sealing ring is used to be sealed and connected to the bypass valve body or the detection box part.

[0006] Furthermore, the bypass valve body includes an air inlet, a valve core chamber and an exhaust port, a driving cylinder is installed on the top of the valve core chamber, and the air inlet and exhaust port are respectively opened on both sides of the bypass valve body.

[0007] Furthermore, the driving cylinder divides the valve core chamber through the valve core at the end, the end of the air inlet is against the inner side of the sealing flange, and the air inlet is fixed as a whole with the sealing flange part by bolts, and the bottom of the bypass valve body is pressed against the bottom position of the detection box.

[0008] Furthermore, a support plate is welded to the side of the detection box, a lifting rod is screwed to the top of the support plate, a pressure plate is welded to the top of the lifting rod, and the top sealing assembly includes a cover plate, an auxiliary pressure-bearing column and a sealing sleeve.

[0009] Furthermore, the cover plate integrally covers the surface of the placement port, the sealing sleeve is used to be sleeved on the outside of the driving cylinder, the pressure plate is pressed on the top position of the auxiliary pressure-bearing column and the sealing sleeve, and the top sealing assembly and the detection box are detachable structures.

[0010] Furthermore, the switching mechanism includes a telescopic sleeve, an inner sealing ring and an outer sealing ring, a first threaded column is welded on one side of the inner sealing ring, a plug-in channel is opened inside the telescopic sleeve, a threaded sleeve is opened at one end of the plug-in channel, a first connecting hole is opened at the other end of the plug-in channel, a second connecting hole is opened on the top of the plug-in channel, and a second docking hole is opened on the surface of the outer sealing ring.

[0011] Furthermore, a first docking hole is opened on the surface of the detection box, the first threaded column is aligned with the first docking hole, a second threaded column is welded on the detection box on the side of the first docking hole, the second threaded column is partially aligned with the second docking hole, and a rubber pad is attached to one side of the outer sealing ring.

[0012] Furthermore, the pressure detection assembly includes an insertion rod, a pressure gauge and an air intake sleeve, the end of the insertion rod is welded with an air intake sleeve, a plurality of air holes are opened on the surface of the air intake sleeve, a connecting rod is welded to the end of the air intake sleeve, a sealing gasket is integrally formed at the end of the connecting rod, the insertion rod is embedded in the interior of the plug-in channel, and the sealing gasket is embedded in the interior of the first connecting hole.

[0013] Furthermore, a telescopic screw and a handwheel are integrally formed on the surface of the insertion rod, the telescopic screw is integrally embedded in the interior of the threaded sleeve, the pressure gauge is installed at the end of the insertion rod, and the handwheel is used to control the rotation of the insertion rod.

[0014] Furthermore, the air intake sleeve is connected to the interior of the air inlet or the interior of the detection box through the air holes on the surface, and the surface diameter of the air intake sleeve is the same as the inner wall diameter of the plug-in channel. The air holes are opened on the side of the air intake sleeve and at one end close to the sealing pad.

[0015] Beneficial effects of the present invention:

[0016] 1. The bag filter fault detection device can drive the pressure detection component through the switching mechanism to connect with one end of the exhaust port of the bypass valve body to be tested or the inside of the detection box for detection. Through the switching and airflow guide structure, the sealing performance of the two chambers at the top and bottom of the valve core inside the bypass valve body can be detected respectively, thereby providing a more accurate leakage location.

[0017] 2. The bag filter fault detection device first injects high-pressure airflow into the interior of the detection box, then blocks the exhaust port of the bypass valve body through the switching mechanism, and keeps the pressure detection component connected to the interior of the detection box. The self-test function of the sealing of the interior of the detection box can be realized in a long-term static state, thereby effectively eliminating the interference of the detection device itself on the detection result.

[0018] 3. After the bag dust collector fault detection device is opened through the top sealing assembly, the bypass valve body can be directly placed inside the detection box, and the top sealing assembly can be sealed by cooperating with the lifting rod to provide downward pressure. Therefore, the installation process of the bypass valve body is simpler and more convenient, and a stronger sealing effect is provided for the installation channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural diagram of a bag filter fault detection device after installation according to the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the detection device after the top sealing assembly is opened;

[0021] Figure 3 It is a structural schematic diagram of the bypass valve body of the present invention;

[0022] Figure 4 It is a schematic diagram of the structure after the switching mechanism and the pressure detection component of the present invention are assembled;

[0023] Figure 5 It is a structural schematic diagram of the pressure detection component part of the present invention;

[0024] Figure 6 It is a side cross-sectional view of the switching mechanism of the present invention and the detection box in a partially docking state;

[0025] Figure 7 It is a side cross-sectional view of the switching mechanism of the present invention in a state of docking with the exhaust port portion;

[0026] In the figure: 1. detection box; 2. top sealing assembly; 3. switching mechanism; 4. pressure detection assembly; 5. bypass valve body; 6. pressure pump; 7. air inlet pipe; 8. sealing flange; 9. support plate; 10. lifting rod; 11. placement port; 12. cover plate; 13. auxiliary pressure column; 14. sealing sleeve; 15. pressure plate; 16. driving cylinder; 17. air inlet; 18. valve core chamber; 19. exhaust port; 20. telescopic sleeve; 2 1. Inner sealing ring; 22. First connecting hole; 23. First threaded column; 24. Second connecting hole; 25. Outer sealing ring; 26. Rubber pad; 27. Second docking hole; 28. Insert rod; 29. ​​Inlet sleeve; 30. Air hole; 31. Connecting rod; 32. Sealing pad; 33. Telescopic screw; 34. Hand wheel; 35. Pressure gauge; 36. Second threaded column; 37. First docking hole; 38. Insertion channel; 39. Threaded sleeve. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0028] See also Figures 1 to 7The present invention provides the following technical solutions: a bag filter fault detection device, comprising a detection device body and a bypass valve body 5, the detection device body comprising a detection box 1, a top sealing assembly 2, a switching mechanism 3 and a pressure detection assembly 4, a sealing flange 8 is welded on one side of the detection box 1, an air intake pipe 7 is inserted into the sealing flange 8, and a pressure pump 6 is connected to the other end of the air intake pipe 7, a placement port 11 is opened on the top of the detection box 1, and the top sealing assembly 2 is filled in the placement port 11, the bypass valve body 5 is placed into the detection box 1 from the placement port 11, a switching mechanism 3 is inserted into the other side of the detection box 1, and a pressure detection assembly 4 is inserted into the switching mechanism 3, and a pressure gauge 35 is screwed at the end of the pressure detection assembly 4, and an inner sealing ring 21 and an outer sealing ring 25 are respectively integrated at both ends of the switching mechanism 3, and the inner sealing ring 21 is used to be sealed and connected with the bypass valve body 5 or part of the detection box 1. The bag filter fault detection device is used to detect the sealing performance of the bypass valve body 5. This embodiment provides a method as follows: Figure 3 A bypass valve body 5 is shown, and is tested, and the bypass valve body 5 controls the internal valve core part to open and close through the driving cylinder 16 at the top, so when the bypass valve body 5 is in a closed state, the top and bottom of the valve core chamber 18 can be separated from each other, so the present invention can perform a sealing test process for the two areas inside the bypass valve body 5 and the internal area of ​​the test box 1 for this structure. The bypass valve body 5 part is an existing mature technology, and the present invention is set according to the conventional bypass valve body 5 structure on the market, so the bypass valve body 5 part does not belong to the protection scope of the present invention, and the specific structure and opening and closing principle of the bypass valve body 5 are not described here.

[0029] When the device is used, the bypass valve body 5 is first placed inside the detection box 1, and then the top sealing component 2 is filled into the placement port 11, and then the lifting rod 10 is started, and the top sealing component 2 can be pressed by the pressure plate 15 to achieve the closing process of the placement port 11. After the bypass valve body 5 is placed inside, the air inlet 17 of the bypass valve body 5 can be connected and sealed with the air inlet pipe 7 by bolts passing through the sealing flange 8, and then the connection state of the switching mechanism 3 is changed, and the subsequent detection process can be carried out. The whole detection process includes the following steps:

[0030] S1, control the driving cylinder 16 to close the valve core chamber 18, and control the switching mechanism 3 to connect with the exhaust port 19, and the pressure detection component 4 partially extends toward the inside of the exhaust port 19. At this time, the pressure gauge 35 detects the pressure inside the exhaust port 19 at the bottom of the valve core chamber 18. At this time, start the pressure pump 6 to form a high-pressure state inside the valve core chamber 18 through the intake pipe 7. If the valve core part is well sealed, the high-pressure state at the air inlet 17 at the top of the valve core chamber 18 will not affect the exhaust port 19 area, so the value of the pressure gauge 35 does not increase. If the value of the pressure gauge 35 increases, it means that there is a leakage problem in the valve core part, that is, the valve core part is not sealed enough;

[0031] S2. If no data change of the pressure gauge 35 is detected in S1, the connection between the switching mechanism 3 and the exhaust port 19 is released and connected to the detection box 1. Figure 6 As shown, at this time, the pressure gauge 35 directly detects the air pressure inside the detection box 1. Therefore, if the data displayed by the pressure gauge 35 increases at this time, it indicates that the shell part of the bypass valve body 5 in the top area of ​​the valve core chamber 18 is leaking, and the high-pressure airflow is leaking into the interior of the detection box 1;

[0032] S3. If no data change of the pressure gauge 35 is detected in S2, the switching mechanism 3 is controlled to move to dock with the exhaust port 19, and the driving cylinder 16 is controlled to release the closed state of the valve core chamber 18. At this time, a unified chamber is formed inside the bypass valve body 5. If the pressure gauge 35 shows an increase in data at this time, it indicates that there is a leakage problem in the area at the bottom of the valve core chamber 18.

[0033] S4. If no data change of the pressure gauge 35 is detected in S1, S2 and S3, it means that the bypass valve body 5 has good sealing performance and there is no leakage problem. At this time, the switching mechanism 3 is connected to the detection box 1 again, and the high-pressure airflow is simultaneously charged into the detection box 1. After charging, the switching mechanism 3 is controlled to connect with the exhaust port 19, and the pressure detection component 4 is controlled to move backward, so that the air intake sleeve 29 is connected with the second connecting hole 24. Figure 7 As shown, at this time, the exhaust port 19 is closed again due to the docking of the switching mechanism 3 with the exhaust port 19, and the high-pressure airflow inside the bypass valve body 5 is discharged. The changes of the pressure gauge 35 in this state are observed. Since the pressure gauge 35 at this time detects the internal pressure of the detection box 1 through the switching mechanism 3, if the pressure displayed by the pressure gauge 35 remains stable, it means that there is no leakage in the detection box 1. If the high-pressure data of the pressure gauge 35 slowly decreases, it means that there is a leakage problem in the main body of the detection box 1, thereby achieving the purpose of detection.

[0034] In this embodiment, the bypass valve body 5 includes an air inlet 17, a valve core chamber 18 and an exhaust port 19. A driving cylinder 16 is installed on the top of the valve core chamber 18. The air inlet 17 and the exhaust port 19 are respectively opened on both sides of the bypass valve body 5. The driving cylinder 16 separates the valve core chamber 18 through the valve core at the end. The end of the air inlet 17 is against the inner side of the sealing flange 8, and the air inlet 17 is fixed to the sealing flange 8 as a whole by bolts. The bottom of the bypass valve body 5 is pressed against the bottom position of the detection box 1. The side of the detection box 1 is welded with a support plate 9, the top of the support plate 9 is screwed with a lifting rod 10, the top of the lifting rod 10 is welded with a pressure plate 15, the top sealing assembly 2 includes a cover plate 12, an auxiliary pressure-bearing column 13 and a sealing sleeve 14, the cover plate 12 covers the surface of the placement port 11 as a whole, the sealing sleeve 14 is used to be sleeved on the outside of the driving cylinder 16, the pressure plate 15 is pressed on the top position of the auxiliary pressure-bearing column 13 and the sealing sleeve 14, and the top sealing assembly 2 and the detection box 1 are detachable structures. After opening the top sealing assembly 2, the bypass valve body 5 can be directly placed inside the detection box 1, and the lifting rod 10 provides downward pressure to seal the top sealing assembly 2, so that the installation process of the bypass valve body 5 is simpler and more convenient, and provides a stronger sealing effect for the installation channel.

[0035] Specifically, by starting the lifting rod 10 to lift, the top sealing assembly 2 can be directly pulled out. In this state, the placement port 11 is in an open state as a whole, so the entire bypass valve body 5 can be directly placed from the placement port 11 into the interior of the detection box 1. At this time, the top sealing assembly 2 is put back and is sleeved on the top position of the bypass valve body 5 with the help of the sealing sleeve 14. The lifting rod 10 is started, and the pressure plate 15 is pressed on the top of the sealing sleeve 14 by the descent of the lifting rod 10, and pressure is applied to the auxiliary pressure-bearing column 13 to ensure that the cover plate 12 performs pressurized sealing treatment on the placement port 11 part.

[0036] In this embodiment, the switching mechanism 3 includes a telescopic sleeve 20, an inner sealing ring 21 and an outer sealing ring 25, a first threaded column 23 is welded on one side of the inner sealing ring 21, an insertion channel 38 is provided inside the telescopic sleeve 20, a threaded sleeve 39 is provided at one end of the insertion channel 38, a first connecting hole 22 is provided at the other end of the insertion channel 38, a second connecting hole 24 is provided at the top of the insertion channel 38, a second docking hole 27 is provided on the surface of the outer sealing ring 25, a first docking hole 37 is provided on the surface of the detection box 1, the first threaded column 23 is aligned with the first docking hole 37, a second threaded column 36 is welded on the detection box 1 on the side of the first docking hole 37, the second threaded column 36 is aligned with part of the second docking hole 27, and a rubber pad 26 is mounted on one side of the outer sealing ring 25. The pressure detection component 4 can be driven by the switching mechanism 3 to connect with one end of the exhaust port 19 of the bypass valve body 5 to be tested or the interior of the detection box 1 for detection. Through the switching and airflow guiding structure, the sealing performance of the two chambers at the top and bottom of the valve core inside the bypass valve body 5 can be detected respectively, thereby providing a more accurate leakage location.

[0037] Specifically, the switching mechanism 3 is used to change the opening and closing state of the exhaust port 19 and to regulate the detection area of ​​the pressure detection assembly 4. When the exhaust port needs to be blocked, the switching mechanism 3 is directly pushed toward the inside of the detection box 1 until the inner sealing ring 21 is pressed against the end of the exhaust port 19. At this time, the second threaded column 36 on the surface of the detection box 1 will partially pass through the second docking hole 27 on the outer sealing ring 25. After the second threaded column 36 is locked with a nut, it can be ensured that the inner sealing ring 21 is pressed against the end of the exhaust port 19 to achieve the closure of the exhaust port 19. If the telescopic sleeve 20 is pulled toward the outside until the first threaded column 23 on the inner sealing ring 21 passes through the first docking hole 37 on the detection box 1 and is locked with a nut, the exhaust port 19 can be in an open state.

[0038] In this embodiment, the pressure detection assembly 4 includes a plug rod 28, a pressure gauge 35 and an air intake sleeve 29. The end of the plug rod 28 is welded with an air intake sleeve 29. The surface of the air intake sleeve 29 is provided with a plurality of air holes 30. The end of the air intake sleeve 29 is welded with a connecting rod 31. The end of the connecting rod 31 is integrally formed with a plugging pad 32. The plug rod 28 is embedded in the interior of the plugging channel 38. The plugging pad 32 is embedded in the interior of the first connecting hole 22. The surface of the plug rod 28 is also integrally formed with a stretching The telescopic screw 33 and the hand wheel 34 are integrally embedded in the threaded sleeve 39, the pressure gauge 35 is installed at the end of the plug rod 28, the hand wheel 34 is used to control the plug rod 28 to rotate, the air intake sleeve 29 is connected with the inside of the air inlet 17 or the inside of the detection box 1 through the air hole 30 on the surface, and the surface diameter of the air intake sleeve 29 is the same as the inner wall diameter of the plug-in channel 38, and the air hole 30 is opened on the side of the air intake sleeve 29 and one end close to the blocking pad 32. First, the high-pressure airflow is injected into the inside of the detection box 1, and then the exhaust port 19 of the bypass valve body 5 is blocked by the switching mechanism 3, and the pressure detection component 4 is kept connected with the inside of the detection box 1, so that the sealing self-check function of the inside of the detection box 1 can be realized in a long-term static state, thereby effectively eliminating the interference of the detection device itself on the detection result.

[0039] Specifically, by controlling the entire pressure detection assembly 4 to rotate, the horizontal movement process can be achieved with the help of the telescopic stud and the threaded sleeve 39, and then the position of the air intake sleeve 29 and the end sealing pad 32 can be changed during the horizontal movement through the plug rod 28. When the hand wheel 34 is turned to control the telescopic stud and the plug rod 28 to move toward the inside of the detection box 1, the sealing pad 32 can be extended from the first connecting hole 22. At this time, the air intake sleeve 29 moves to the inside of the plug-in channel 38, so the air holes 30 on the arc surface of the air intake sleeve 29 are blocked, and only the air flow at the first connecting hole 22 can pass through the air holes 30 on the end face, and then be transmitted to the pressure gauge 35 along the inside of the plug rod 28. In combination with the effect of docking the switching mechanism 3 with the exhaust port 19 in this state, the pressure gauge 35 can realize the detection process of the inside of the exhaust port 19. Alternatively, the hand wheel 34 is rotated to drive the telescopic stud to move backward, the air inlet sleeve 29 is aligned with the second connecting hole 24, and the sealing gasket 32 ​​seals the first connecting hole 22. At this time, the pressure gauge 35 can only detect the internal air pressure of the detection box 1.

[0040] The basic principles and main features of the present invention and the advantages of the present invention are shown and described above. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention.

[0041] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A bag filter fault detection device, comprising a detection device body and a bypass valve body (5), characterized in that: The detection device body comprises a detection box (1), a top sealing assembly (2), a switching mechanism (3) and a pressure detection assembly (4); a sealing flange (8) is welded on one side of the detection box (1); an air intake pipe (7) is inserted into the interior of the sealing flange (8); the other end of the air intake pipe (7) is connected to a pressure pump (6); a placement opening (11) is opened on the top of the detection box (1); the interior of the placement opening (11) is filled with the top sealing assembly (2); the bypass valve body (5) is connected from The placement port (11) is placed into the interior of the detection box (1), the other side of the detection box (1) is inserted with a switching mechanism (3), the interior of the switching mechanism (3) is inserted with a pressure detection component (4), the end of the pressure detection component (4) is screwed with a pressure gauge (35), and the two ends of the switching mechanism (3) are respectively integrally formed with an inner sealing ring (21) and an outer sealing ring (25), and the inner sealing ring (21) is used to be sealed and connected with the bypass valve body (5) or the detection box (1).

2. A bag filter fault detection device according to claim 1, characterized in that: The bypass valve body (5) comprises an air inlet (17), a valve core chamber (18) and an air outlet (19); a driving cylinder (16) is installed on the top of the valve core chamber (18); and the air inlet (17) and the air outlet (19) are respectively arranged on two sides of the bypass valve body (5).

3. A bag filter fault detection device according to claim 2, characterized in that: The driving cylinder (16) separates the valve core chamber (18) through the valve core at the end, the end of the air inlet (17) is pressed against the inner side of the sealing flange (8), and the air inlet (17) is fixed as a whole with the sealing flange (8) by bolts, and the bottom of the bypass valve body (5) is pressed against the bottom position of the detection box (1).

4. The fault detection device for bag filter according to claim 2 is characterized in that: A support plate (9) is welded to the side of the detection box (1), a lifting rod (10) is screwed to the top of the support plate (9), a pressure plate (15) is welded to the top of the lifting rod (10), and the top sealing assembly (2) includes a cover plate (12), an auxiliary pressure-bearing column (13) and a sealing sleeve (14).

5. A bag filter fault detection device according to claim 4, characterized in that: The cover plate (12) entirely covers the surface of the placement opening (11); the sealing sleeve (14) is used to be sleeved on the outside of the driving cylinder (16); the pressure plate (15) is pressed on the top position of the auxiliary pressure-bearing column (13) and the sealing sleeve (14); and the top sealing component (2) and the detection box (1) are of a detachable structure.

6. A bag filter fault detection device according to claim 2, characterized in that: The switching mechanism (3) comprises a telescopic sleeve (20), an inner sealing ring (21) and an outer sealing ring (25); a first threaded column (23) is welded on one side of the inner sealing ring (21); a plug-in channel (38) is provided inside the telescopic sleeve (20); a threaded sleeve (39) is provided at one end of the plug-in channel (38); a first connecting hole (22) is provided at the other end of the plug-in channel (38); a second connecting hole (24) is provided at the top of the plug-in channel (38); and a second docking hole (27) is provided on the surface of the outer sealing ring (25).

7. A bag filter fault detection device according to claim 6, characterized in that: A first docking hole (37) is provided on the surface of the detection box (1), the first threaded column (23) is aligned with the first docking hole (37), a second threaded column (36) is welded on the detection box (1) on the side of the first docking hole (37), the second threaded column (36) is partially aligned with the second docking hole (27), and a rubber pad (26) is attached to one side of the outer sealing ring (25).

8. The fault detection device for bag filter according to claim 6 is characterized in that: The pressure detection assembly (4) comprises an insertion rod (28), a pressure gauge (35) and an air intake sleeve (29); the end of the insertion rod (28) is welded with the air intake sleeve (29); a plurality of air holes (30) are provided on the surface of the air intake sleeve (29); a connecting rod (31) is welded to the end of the air intake sleeve (29); a sealing pad (32) is integrally formed at the end of the connecting rod (31); the insertion rod (28) is embedded in the interior of the insertion channel (38); and the sealing pad (32) is embedded in the interior of the first connecting hole (22).

9. A bag filter fault detection device according to claim 8, characterized in that: The surface of the insertion rod (28) is also integrally formed with a telescopic screw (33) and a hand wheel (34); the telescopic screw (33) is integrally embedded in the interior of the threaded sleeve (39); the pressure gauge (35) is installed at the end position of the insertion rod (28); and the hand wheel (34) is used to control the rotation of the insertion rod (28).

10. A bag filter fault detection device according to claim 9, characterized in that: The air intake sleeve (29) is connected to the interior of the air intake port (17) or the interior of the detection box (1) through the air holes (30) on the surface, and the surface diameter of the air intake sleeve (29) is the same as the inner wall diameter of the plug-in channel (38). The air holes (30) are provided on the side of the air intake sleeve (29) and at one end close to the sealing pad (32).

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