A thin coal seam mine motor shell sealing detection device

Abstract

The application discloses a kind of thin coal seam mine motor shell leakproofness detection device, it belongs to detection device technical field.The first sealing nozzle is arranged in the lower end of pressurizing cylinder;Placement table is arranged on the frame, and the second sealing nozzle is arranged on the placement table and located in the lower side of the first sealing nozzle;Baffle is fixedly arranged on the pressurizing cylinder;Outer sleeve is slidably arranged on the pressurizing cylinder;Inner sleeve is arranged in the inner side of outer sleeve.The beneficial effects of the application are to provide a kind of thin coal seam mine motor shell leakproofness detection device, when the outer sleeve forms a sealed space with the motor shell, whether the first sealing nozzle and the second sealing nozzle can be detected to block the motor shell, to avoid detection error caused by not blocking in place, by the inner sleeve, different positions of the motor shell can be detected to determine whether the motor shell is damaged or not, and the specific position of the damage can be determined to facilitate subsequent improvement.

Description

Technical Field

[0001] The present application relates to the technical field of sealing detection devices, and in particular to a sealing detection device for motor housings used in thin coal seam mines. Background Art

[0002] In thin coal seam mining, the working space of mining equipment is limited. The limited working space will lead to high temperature and dust that is difficult to discharge. The working environment of the motor is relatively harsh. Dust enters the motor housing and adheres to the surface of the motor rotor and other components, affecting the normal use of the motor. Therefore, it is necessary to ensure the sealing of the motor housing to prevent dust from entering. The existing method of detecting the sealing of the motor housing mostly uses the pressure decay method. First, the port of the motor housing is sealed, and then the motor housing is pressurized. The pressurization can be liquid or gas. If liquid pressurization is used, the liquid in the motor housing needs to be cleaned after the test is completed. Therefore, it is preferred to use gas to pressurize the motor housing. When the pressure in the motor housing reaches the preset value, the pressure in the motor housing is maintained for a period of time. If the pressure value drops over a large range, it means that there is a leak in the motor housing.

[0003] However, the above detection method can only detect whether there is a leak in the motor housing, and it is inconvenient to lock the leakage position of the motor housing, which is not conducive to improving the manufacturing process of the motor housing according to the leakage position, resulting in the product quality not being guaranteed. At the same time, it is necessary to test multiple motor housings to ensure the detection efficiency. Generally, a sealing nozzle is used to seal the motor housing port by pressing. If the motor housing port is not sealed in place, it will cause detection errors, and it is impossible to determine whether the leakage is caused by the failure of the seal to be in place or the motor housing has a leak.

[0004] Therefore, a device for detecting the sealing performance of motor housings for thin coal seam mines is needed to solve the above problems. Summary of the Invention

[0005] The content of this application is used to briefly introduce concepts that will be described in detail in the detailed description section below. The content of this application is not intended to identify key features or essential features of the technical solution for which protection is sought, nor is it intended to limit the scope of the technical solution for which protection is sought.

[0006] In order to solve the technical problems mentioned in the above background technology section, some embodiments of the present application provide a motor housing sealing detection device for thin coal seam mines, including: a frame, a crossbeam is mounted on the frame, and a lifting member is provided on the crossbeam; a pressure cylinder is installed on the lifting member, and a first sealing nozzle is provided at the lower end; a placing table is provided on the frame, and a second sealing nozzle is provided on the placing table, which is located below the first sealing nozzle, and the first sealing nozzle and the second sealing nozzle are respectively used to seal the upper and lower ports of the motor housing; a baffle is fixedly provided on the pressure cylinder and is located above the first sealing nozzle; an outer sleeve is slidably provided on the pressure cylinder, and is sealed with the baffle, and is used to be provided on the motor housing to form a sealed space between the outer wall of the motor housing; an inner sleeve is provided on the inner side of the outer sleeve, and is used to be provided on the motor housing to form a pressure measuring space between the outer wall of the motor housing; an air pressure sensor is provided in the pressure cylinder; a first air pump is provided on the frame, and gas is transported to the pressure cylinder through a pipeline; wherein a first sealing structure is provided on the outer sleeve, and a second sealing structure is provided on the inner sleeve.

[0007] The two ports of the motor housing are sealed by the first sealing nozzle and the second sealing nozzle, and at the same time, in conjunction with the outer sleeve, when the outer sleeve and the motor housing form a sealed space, it is possible to detect whether the second sealing nozzle has sealed the motor housing, thereby avoiding detection errors caused by the second sealing nozzle not being sealed in place. The inner sleeve can be used to detect different positions of the motor housing to determine whether there are any damage or leaks in the motor housing, and at the same time, the specific position of the damage and leakage can be determined for subsequent improvements.

[0008] Furthermore, the first sealing structure includes: a sealing groove arranged at the lower end of the outer sleeve, a sealing bag arranged in the sealing groove, which contacts the lower end of the outer wall of the motor housing through expansion of the sealing bag to form a sealed space; a ring plate is arranged at the upper end of the outer sleeve, and a sealing ring is arranged on the ring plate for abutting against the upper end of the baffle.

[0009] By setting the sealing groove and sealing bag, when the sealing groove moves to the lower end of the motor housing, the sealing bag expands and abuts against the lower end of the outer wall of the motor housing, thereby forming a sealed space between the motor housing and the motor housing, which is used to detect whether there is air leakage caused by the second sealing mouth not being sealed in place.

[0010] Furthermore, the inner sleeve includes: two annular plates arranged up and down, and annular side plates of the two annular plates; the second sealing structure includes: annular grooves are opened in the annular plates, and the second sealing structure includes: the annular grooves on the two annular plates are connected to each other, and a sealing diaphragm is provided on the side of the annular groove close to the motor housing; the air pressure in the annular groove increases, causing the sealing diaphragm to expand and deform until it abuts against the outer wall of the motor housing.

[0011] By setting up the sealing diaphragm, when the air pressure in the annular groove increases, the annular film abuts against the outer wall of the motor housing, and the motor housing in the area between the two annular plates can be inspected to determine the specific location of the damaged hole.

[0012] Furthermore, an annular groove is formed between the two annular flat plates and the annular side plate, and an annular baffle for separating the annular groove is provided between the two annular flat plates. The annular baffle separates the annular groove into a first area close to the motor housing and a second area away from the side of the motor housing. The second area is connected to a ventilation pipe connected to the outside world.

[0013] By setting the first area and the second area, when testing, if there is a damage or hole in the motor housing, gas will leak out through the vent pipe. At this time, the damage is located in the area of ​​the annular groove.

[0014] Furthermore, a rotating ring tightly attached to the annular baffle is rotatably connected in the second area. A through hole is provided on the annular baffle, and a connecting hole is provided on the rotating ring. The connecting hole and the through hole are staggered or overlapped to disconnect or connect the first area and the second area.

[0015] By providing the rotating ring, when the sealing diaphragm is not in contact with the motor housing, the first area will not be communicated with the second area, and the gas in the sealed space will not be discharged through the exhaust pipe.

[0016] Furthermore, a pressure cylinder is provided on the annular flat plate, the pressure cylinder is connected to the annular groove, a piston plate is slidingly provided in the pressure cylinder, the piston plate is fixedly connected to a piston rod with one end penetrating into the second area, a pressure spring is connected between the piston plate and the inner wall of the pressure cylinder, a guide groove is provided on the side wall of the rotating ring, one end of the piston rod is fixedly connected to a guide block embedded in the guide groove and sliding, and the guide groove extends spirally on the outer surface of the rotating ring.

[0017] Through the provided pressure cylinder and piston rod, when the air pressure in the annular groove reaches a predetermined value, the sealing diaphragm expands and abuts against the outer wall of the motor housing. At this time, the pressure measuring space is sealed, and then the piston plate moves under the action of the air pressure, pushing the piston rod and the guide block to move, and then the rotating ring rotates under the action of the guide groove, so that the connecting hole and the through hole coincide with each other.

[0018] Furthermore, a first cylinder is fixedly provided on the baffle, one end of the piston rod of the first cylinder is fixedly connected to the inner sleeve, and a second air pump is also provided on the inner sleeve, and the second air pump is connected to the annular groove through an air pipe.

[0019] The cylinder can drive the inner sleeve to move up and down, and different positions of the motor housing can be tested to determine the specific leakage and damage location.

[0020] Furthermore, a mounting platform is fixedly provided on the pressurizing cylinder, a two-way air pump is provided on the mounting platform, a sliding cylinder connected to the two-way air pump is fixedly provided on the mounting platform, a sliding plate is slidingly connected inside the sliding cylinder, the sliding plate is fixedly connected to a sliding tube connected to the sliding cylinder, one end of the sliding tube is connected to the outer sleeve and is connected to the sealing bag through a pipeline.

[0021] Through the provided sliding cylinder and sliding tube, when the bidirectional cylinder inflates the sliding cylinder, it will first drive the sliding plate and the outer sleeve to move downward. When the outer sleeve moves to the extreme position, the sealing groove is located at the lower end of the motor housing. At this time, the sealing bag can abut against the lower end of the outer wall of the motor housing. After the outer sleeve moves to the extreme position, the sealing bag is inflated through the sliding tube, and a sealed space can be formed at this time.

[0022] The beneficial effects of this application are:

[0023] 1. The two ports of the motor housing are sealed by the first sealing nozzle and the second sealing nozzle. At the same time, the outer sleeve is cooperated with the outer sleeve. When the outer sleeve and the motor housing form a sealed space, it can be detected whether the second sealing nozzle is properly sealed on the motor housing, avoiding detection errors caused by the second sealing nozzle not being properly sealed.

[0024] 2. Through the provided inner sleeve, different positions of the motor casing can be inspected to determine whether there are any damage holes in the motor casing, and the specific location of the damage can be determined for subsequent improvements. When no damage is detected in the motor casing, the first sealing nozzle is not sealed in place and needs to be adjusted, which can avoid detection errors caused by inadequate port sealing.

[0025] 3. By setting the rotating ring, when the sealing diaphragm is not in contact with the motor housing, the first area will not be connected with the second area, and the gas in the sealed space will not be discharged through the exhaust pipe, thereby reducing the number of inflation times of the first air pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings constituting a part of this application are used to provide a further understanding of this application and make other features, purposes and advantages of this application more apparent. The drawings and descriptions of the exemplary embodiments of this application are used to explain this application and do not constitute an improper limitation on this application.

[0027] In addition, throughout the drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and that the elements and components are not necessarily drawn to scale.

[0028] In the attached figure:

[0029] Figure 1 is an overall schematic diagram according to an embodiment of the present application;

[0030] Figure 2yes Figure 1 A schematic diagram of the installation of the outer sleeve in the embodiment;

[0031] Figure 3 yes Figure 2 A partial enlarged schematic diagram of point A in the middle;

[0032] Figure 4 yes Figure 1 Schematic diagram of the installation of the sliding cylinder and the sliding tube in the embodiment;

[0033] Figure 5 yes Figure 1 A cross-sectional structural diagram of the inner sleeve in the embodiment;

[0034] Figure 6 yes Figure 1 A schematic diagram of the installation of the rotating ring in the embodiment;

[0035] Figure 7 yes Figure 6 A partial enlarged schematic diagram of point B in the middle.

[0036] Reference numerals:

[0037] 10. Frame; 11. Crossbeam; 12. Pressurizing cylinder; 13. Lifting element; 14. First sealing nozzle; 15. Placement platform; 16. Second sealing nozzle; 17. Baffle; 18. Outer sleeve; 19. Inner sleeve; 20. Air pressure sensor; 21. First air pump; 22. Ring plate; 23. Sealing ring; 24. Sealing groove; 25. Sealing capsule; 26. Mounting platform; 27. Two-way air pump; 28. Sliding cylinder; 29. ​​Sliding plate; 30 , sliding tube; 31, first cylinder; 32, annular groove; 33, annular flat plate; 34, annular side plate; 35, sealing diaphragm; 36, second air pump; 37, annular baffle; 38, first area; 39, second area; 40, vent pipe; 41, through hole; 42, rotating ring; 43, connecting hole; 44, pressure cylinder; 45, piston plate; 46, piston rod; 47, pressure spring; 48, guide groove; 49, guide block. DETAILED DESCRIPTION

[0038] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as being limited to the embodiments described herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are for illustrative purposes only and are not intended to limit the scope of protection of the present disclosure.

[0039] It should also be noted that, for ease of description, only the parts related to the invention are shown in the drawings. In the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0040] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0041] It should be noted that the modifications of "one" and "multiple" mentioned in the present disclosure are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, they should be understood as "one or more".

[0042] The present disclosure will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0043] Reference Figure 1-7 A device for detecting the sealing performance of a motor housing for a thin coal seam mine comprises: a frame 10, a crossbeam 11, a pressure cylinder 12, a lifting member 13, a first sealing nozzle 14, a placement platform 15, a second sealing nozzle 16, a baffle 17, an outer sleeve 18, and an inner sleeve 19. A crossbeam 11 is provided on the frame 10, to which a lifting member 13 is fixedly connected. The lifting member 13 is configured as an electric slide rail, and the pressure cylinder 12 is mounted on the electric slide rail so that the pressure cylinder 12 moves up and down under the drive of the electric slide rail. An air pressure sensor 20 is provided in the pressure cylinder 12. A first air pump 21 is also provided on the frame 10. The first air pump 21 is connected to the pressure cylinder 12 by a pipeline, and gas is introduced into the pressure cylinder 12 through the first air pump 21. The first sealing nozzle 14 is fixed at the lower end of the pressure cylinder 12 and is used to seal the upper port with the motor housing. A placement platform 15 is mounted on the frame 10. A second sealing nozzle 16 is positioned on the placement platform 15 and below the first sealing nozzle 14, sealing the lower end of the motor housing. During testing, the motor housing is placed between the first and second sealing nozzles 14, 16. Air is introduced into the motor housing through the pressurizing cylinder 12 and the first sealing nozzle 14. An air pressure sensor 20 is used to detect whether the air pressure is maintained to perform a seal test.

[0044] If the air pressure sensor 20 detects a continuous drop in air pressure, the motor housing and the first and second sealing nozzles 14, 16 are pressed against the upper and lower ends of the motor housing by pressure. During detection, the first and second sealing nozzles 14, 16 may not be properly sealed, resulting in a detection error. Therefore, in order to avoid the impact of the detection caused by the improper sealing, the following solution is adopted;

[0045] To avoid detection errors caused by the second sealing nozzle 16 not being properly sealed, in another embodiment, a baffle 17 is fixedly connected to the pressurizing cylinder 12. A sliding seal outer sleeve 18 is mounted on the baffle 17. When the outer sleeve 18 slides downward, the outer sleeve 18 can be positioned on the outside of the motor housing. A ring plate 22 is provided at the upper end of the outer sleeve 18, and a sealing ring 23 is provided at the lower end of the ring plate 22, which abuts the baffle 17. When the outer sleeve 18 moves to its lowest position, the sealing ring 23 abuts the baffle 17. A sealing groove 24 is provided at the lower end of the outer sleeve 18. When the outer sleeve 18 is at its lowest position, the sealing groove 24 faces the lower end of the motor housing. A sealing bladder 25 is disposed within the sealing groove 24. When the sealing bladder 25 expands and contacts the lower end of the outer wall of the motor housing, a sealed space is formed between the outer sleeve 18 and the motor housing.

[0046] When the air pressure sensor 20 detects that the air pressure decreases, the outer sleeve 18 moves downward to the lowermost position and forms a sealed space through the sealing bag 25 and the sealing ring 23.

[0047] After the outer sleeve 18 moves to the lowermost position, if the air pressure sensor 20 detects that the air pressure no longer decreases, it means that the first sealing nozzle 14 is not sealed in place or the motor housing is damaged and leaking; if the air pressure sensor 20 detects that the air pressure continues to drop, it means that the second sealing nozzle 16 is not sealed in place and needs to be adjusted.

[0048] In one embodiment, to ensure that the sealing bladder 25 does not expand until the outer sleeve 18 has moved to its lowest position, thereby preventing the sealing bladder 25 from being scratched and damaged, a mounting platform 26 is fixedly mounted on the pressurizing cylinder 12. A two-way air pump 27 is mounted on the mounting platform 26. A sliding cylinder 28 connected to the two-way air pump 27 is fixedly mounted on the mounting platform 26. A sliding plate 29 is slidably connected to the sliding cylinder 28. The sliding plate 29 is fixedly connected to a sliding tube 30 that is connected to the sliding cylinder 28. One end of the sliding tube 30 is connected to the outer sleeve 18 and is connected to the sealing bladder 25 via a pipe. When the two-way air pump 27 inflates the sliding cylinder 28, the sliding tube 30 moves, thereby causing the outer sleeve 18 to move downward. After the outer sleeve 18 moves downward to its lowest position, the air is discharged into the sealing bladder 25 through the sliding tube 30, causing the sealing bladder 25 to expand. Likewise, when the outer sleeve 18 needs to be reset, the bidirectional air pump 27 extracts the air in the sliding cylinder 28 , which first shrinks the sealing airbag and then resets the outer sleeve 18 .

[0049] To detect damage and leaks in the motor housing, and to determine the location of leaks, a first cylinder 31 is fixedly connected to the baffle 17. One end of the piston rod of the first cylinder 31 is fixedly connected to an inner sleeve 19, which is positioned inside the outer sleeve 18. The inner sleeve 19 comprises two annular plates 33 arranged one above the other, and annular side plates 34 surrounding the two plates. Each plate 33 has an annular groove 32 formed within it, which communicates with each other. A sealing diaphragm 35 is positioned on the side of the groove 32 near the motor housing. The sealing diaphragm 35 is a thin rubber film that expands toward the motor housing as the pressure within the groove 32 increases. As the pressure within the groove 32 increases, the sealing diaphragm 35 expands and deforms until one side abuts the outer wall of the motor housing, sealing it. A second air pump 36 is fixedly mounted on the inner sleeve 19, capable of both inflation and deflation. The second air pump 36 is connected to the annular groove 32 via an air pipe. When it is necessary to detect whether the motor housing is leaking, gas is introduced into the annular groove 32 through the second air pump 36 , causing the sealing diaphragm 35 to expand and deform, thereby abutting against the motor housing.

[0050] An annular groove is formed between the two annular plates 33 and the annular side plate 34. An annular baffle 37 is disposed between the two annular plates 33 to separate the annular groove. The annular baffle 37 divides the annular groove into a first region 38 near the motor housing and a second region 39 away from the motor housing. The first region 38 forms a pressure measurement space with the outer wall of the motor housing. The second region 39 is connected to a vent pipe 40 that communicates with the outside world. A through hole 41 is provided in the annular baffle 37. When the sealing diaphragm 35 abuts the motor housing and the motor housing is damaged or leaking, the air inside the motor housing, under the action of air pressure, will enter the first and second regions 38, 39, and be discharged through the vent pipe 40. At this time, the air pressure sensor 20 detects a decrease in air pressure, indicating that the portion of the motor housing within the pressure measurement area is damaged or leaking.

[0051] A rotating ring 42, which is in close contact with the annular baffle 37, is rotatably connected within the second region 39. The annular baffle 37 has a through-hole 41, and the rotating ring 42 has a connecting hole 43. When the connecting hole 43 and the through-hole 41 are offset, the first region 38 is disconnected from the second region 39; when the connecting hole 43 and the through-hole 41 coincide, the first region 38 and the second region 39 are connected. A pressure cylinder 44 is mounted on the annular plate 33 and communicates with the annular groove 32. A piston plate 45 is slidably mounted within the pressure cylinder 44. A piston rod 46, one end of which is fixedly connected to the piston plate 45 and extends into the second region 39, is fixedly connected to the piston plate 45. A pressure spring 47 is connected between the piston plate 45 and the inner wall of the pressure cylinder 44. A guide groove 48 is defined on the sidewall of the rotating ring 42. One end of the piston rod 46 is fixedly connected to a guide block 49 that slides within the guide groove 48. The guide groove 48 spirally extends along the outer surface of the rotating ring 42. When the second air pump 36 introduces air into the annular groove 32, it first expands and deforms the sealing diaphragm 35. When the air pressure in the annular groove 32 reaches a certain level, it pushes the piston plate 45 to move. Subsequently, the piston rod 46, guide block 49, and guide groove 48 drive the rotating ring 42 to rotate, causing the connecting hole 43 to coincide with the through hole 41. Similarly, when the second air pump 36 deflates, it first causes the connecting hole 43 to shift away from the through hole 41, and then restores the sealing diaphragm 35.

[0052] The first cylinder 31 drives the inner sleeve 19 up and down, enabling inspection of different locations on the motor housing from top to bottom. This, combined with the outer sleeve 18, prevents leaks from multiple locations on the motor housing, which could cause the inner sleeve 19 to leak at one location, allowing gas inside the motor housing to leak through other damaged locations and affect inspection.

[0053] When the inner sleeve 19 does not detect damage or air leakage in the motor housing, the first sealing nozzle 14 is not sealed in place and needs to be adjusted.

[0054] Working or installation process: In the initial state, the connecting hole 43 and the through hole 41 are staggered, and the outer sleeve 18 and the inner sleeve 19 are both located above the first sealing nozzle 14;

[0055] 1. During the test, the motor housing is placed between the first sealing nozzle 14 and the second sealing nozzle 16. The pressurizing cylinder 12 is driven downward by the electric slide rail so that the first sealing nozzle 14 blocks the upper end of the motor housing and the second sealing nozzle 16 blocks the lower end of the motor housing. Air is ventilated into the pressurizing cylinder 12 via the first air pump 21. The air pressure sensor 20 detects the air pressure in the pressurizing cylinder 12. If there is no drop in air pressure, it indicates that the motor housing is not damaged or leaking. If the air pressure sensor 20 detects a drop in air pressure, it indicates that there is a leak.

[0056] 2. There are three possible causes of air leakage: the first is that the first sealing nozzle 14 is not properly sealed, resulting in air leakage at the upper end of the housing; the second is that the second sealing nozzle 16 is not properly sealed, resulting in air leakage at the lower end of the housing; and the third is that the motor housing itself is damaged and leaking. By activating the two-way air pump 27 to ventilate the sliding cylinder 28, the outer sleeve 18 moves downward until the sealing ring 23 abuts the baffle 17. At this point, the outer sleeve 18 is in its lowest position and cannot descend further. The sealing groove 24 faces the lower end of the outer wall of the motor housing. The two-way air pump 27 continues to ventilate the sealing airbag through the sliding tube 30, so that the sealing airbag abuts against the outer wall of the motor housing to form a sealed space. At this time, if the air pressure sensor 20 detects that the air pressure continues to drop after the first air pump 21 ventilates the pressurizing cylinder 12, it means that the second sealing nozzle 16 is not sealed in place and needs to be adjusted or replaced. If the air pressure does not drop significantly, it means that the first sealing nozzle 14 is not sealed in place or the motor housing is damaged and leaking.

[0057] 3. If the air pressure sensor 20 detects that the air pressure has not dropped significantly in step 2, the first cylinder 31 is started to drive the inner sleeve 19 to move downward, so that the inner sleeve 19 is sleeved on the outside of the motor housing, and then the annular groove 32 is ventilated by the second air pump 36, so that the sealing diaphragm 35 abuts against the outer wall of the motor housing for sealing, and then the piston plate 45 is driven to move under the action of the air pressure in the annular groove 32. Under the action of the piston rod 46 and the guide block 49, the guide groove 48 is matched to make the rotating ring 42 rotate, and the connecting hole 43 is opposite to the through hole 41. When the damaged leakage area of ​​the motor housing is located at the position of the annular groove, the air in the motor housing is discharged through the vent pipe 40 under the action of the air pressure, and the air pressure sensor 20 will detect the air pressure drop; the inner sleeve 19 is driven to move downward step by step by the first cylinder 31, so as to realize the detection of the entire motor housing and complete the detection of air leaks in different positions of the motor housing;

[0058] 4. If no air leakage is detected in the motor housing, it means that the first sealing nozzle 14 is not properly sealed and needs to be adjusted or replaced.

[0059] The above description is only an illustration of some preferred embodiments of the present disclosure and the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the embodiments of the present disclosure is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but should also cover other technical solutions formed by any combination of the above-mentioned technical features or their equivalent features without departing from the above-mentioned inventive concept. For example, the above-mentioned features are replaced with (but not limited to) technical features with similar functions disclosed in the embodiments of the present disclosure.

Claims

1. A device for detecting the sealing performance of a motor housing for a thin coal seam mine, comprising: The frame is provided with a crossbeam, and the crossbeam is provided with a lifting member, which is characterized by: Also includes: The pressurizing cylinder is installed on the lifting member and has a first sealing nozzle at its lower end; A placement table is provided on the frame, and a second sealing nozzle is provided on the placement table and is located below the first sealing nozzle. The first sealing nozzle and the second sealing nozzle are used to seal the upper and lower ports of the motor housing respectively. A baffle is fixedly mounted on the pressurizing cylinder and is located above the first sealing nozzle; The outer sleeve is slidably mounted on the pressurizing cylinder and is sealed with the baffle. It is used to be mounted on the motor housing to form a sealed space with the outer wall of the motor housing. The inner sleeve is arranged inside the outer sleeve and is used to be sleeved on the motor housing to form a pressure measuring space between the inner sleeve and the outer wall of the motor housing; An air pressure sensor is disposed in the pressurized cylinder; A first air pump is provided on the frame and delivers gas to the pressurized cylinder through a pipeline; Wherein, a first sealing structure is provided on the outer sleeve, and a second sealing structure is provided on the inner sleeve; The inner sleeve includes: Two annular flat plates arranged one above the other, and annular side plates of the two annular flat plates; The second sealing structure comprises: an annular groove is formed in each annular plate, the annular grooves on the two annular plates are connected to each other, and a sealing diaphragm is provided on the side of the annular groove close to the motor housing; The air pressure in the annular groove increases, causing the sealing diaphragm to expand and deform until it contacts the outer wall of the motor housing; An annular groove is formed between the two annular flat plates and the annular side plate. An annular baffle is provided between the two annular flat plates for separating the annular groove. The annular baffle divides the annular groove into a first area close to the motor housing and a second area away from the motor housing. The second area is connected to a vent pipe communicating with the outside world. A rotating ring tightly attached to the annular baffle is rotatably connected in the second area, a through hole is formed in the annular baffle, and a connecting hole is formed in the rotating ring. The connecting hole and the through hole are staggered to disconnect the first area from the second area, and the connecting hole and the through hole overlap to connect the first area to the second area. A first air cylinder is fixedly arranged on the baffle, one end of the piston rod of the first cylinder is fixedly connected to the inner sleeve, and a second air pump is also arranged on the inner sleeve, and the second air pump is connected to the annular groove through an air pipe.

2. The device for detecting the sealing performance of a motor housing for a thin coal seam mine according to claim 1, characterized in that: The first sealing structure comprises: A sealing groove is provided at the lower end of the outer sleeve, and a sealing bag is provided in the sealing groove. The sealing bag expands and contacts the lower end of the outer wall of the motor housing to form a sealed space; The upper end of the outer sleeve is provided with a ring plate, and the ring plate is provided with a sealing ring for abutting against the upper end of the baffle.

3. The device for detecting the sealing performance of a motor housing for a thin coal seam mine according to claim 2, characterized in that: A pressure cylinder is provided on the annular flat plate, which is connected to the annular groove. A piston plate is slidingly provided in the pressure cylinder, and the piston plate is fixedly connected to a piston rod with one end penetrating into the second area. A pressure spring is connected between the piston plate and the inner wall of the pressure cylinder. A guide groove is provided on the side wall of the rotating ring, and one end of the piston rod is fixedly connected to a guide block embedded in the guide groove and sliding. The guide groove extends spirally on the outer surface of the rotating ring.

4. The device for detecting the sealing performance of a motor housing for a thin coal seam mine according to claim 3, characterized in that: The pressurizing cylinder is fixedly provided with a mounting platform, a two-way air pump is provided on the mounting platform, a sliding cylinder connected to the two-way air pump is fixedly provided on the mounting platform, a sliding plate is slidably connected inside the sliding cylinder, the sliding plate is fixedly connected with a sliding tube connected to the sliding cylinder, one end of the sliding tube is connected to the outer sleeve and is connected to the sealing bag through a pipeline.

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