Thin seam mining motor shell sealing performance detection device

Abstract

The invention discloses a thin seam mining motor shell sealing performance detection device, and belongs to the technical field of detection devices. Comprising a rack and a pressurizing cylinder, the placing table is arranged on the rack, and a second sealing nozzle located on the lower side of the first sealing nozzle is arranged on the placing table; the baffle is fixedly arranged on the pressurizing cylinder; the outer side sleeve is arranged on the pressurizing cylinder in a sliding and sleeving manner; and the inner side sleeve is arranged on the inner side of the outer side sleeve. The thin seam mining motor shell sealing performance detection device has the beneficial effects that when the outer side sleeve and the motor shell form a sealed space, whether the first sealing nozzle and the second sealing nozzle plug the motor shell or not can be detected, detection errors caused by the fact that plugging is not in place are avoided, and through the arranged inner side sleeve, the sealing performance of the motor shell can be detected. Different positions of the motor shell can be detected so as to determine whether the motor shell is damaged or not, and meanwhile, the specific damage position can be determined so as to facilitate subsequent improvement.

Description

Technical Field

[0001] This application relates to the technical field of sealing detection devices, and more particularly, to a sealing detection device for the outer shell of a motor used in thin coal seams. Background Art

[0002] In the work of thin coal seam mining, the working space of mining equipment is limited. The limited working space will cause high temperature and dust to be difficult to discharge. The working environment of the motor is relatively harsh. Dust entering the motor housing will adhere to the surfaces of components such as the motor rotor, 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 sealing detection of the motor housing mostly uses the pressure decay method. First, the ports of the motor housing are blocked, and then the inside of the motor housing is pressurized. The pressurization can be achieved by using liquid or gas. If liquid pressurization is used, the liquid inside the motor housing needs to be cleaned after the detection is completed. Therefore, gas pressurization of the inside of the motor housing is preferably used. When the pressure inside the motor housing reaches a preset value, the pressure inside the motor housing is maintained for a period of time. If the pressure value drops within 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 leak location of the motor housing, which is not conducive to improving the manufacturing process of the motor housing according to the leak location, resulting in the product quality not being guaranteed. At the same time, when multiple motor housings need to be tested to ensure the detection efficiency, generally, a plugging nozzle is used to block the ports of the motor housing by pressing. If the ports of the motor housing are not blocked properly, it will lead to detection errors and it is impossible to determine whether the air leakage is caused by improper plugging or there is a leak in the motor housing.

[0004] Therefore, a sealing detection device for the outer shell of a motor used in thin coal seams is needed to solve the above problems. Summary of the Invention

[0005] This part of the content of this application is used to briefly introduce the concepts, which will be described in detail in the following specific implementation part. This part of the content of this application is not intended to identify the key features or essential features of the claimed technical solution, nor is it intended to limit the scope of the claimed technical solution.

[0006] To solve the technical problems mentioned in the above background art section, some embodiments of the present application provide a sealing performance detection device for the outer shell of a mining motor in thin coal seams, including: a frame, on which a cross beam is erected, and a lifting member is arranged on the cross beam; a pressure cylinder, installed on the lifting member, and a first sealing nozzle is arranged at the lower end; a placement table, arranged on the frame, and a second sealing nozzle located below the first sealing nozzle is arranged on the placement table. The first sealing nozzle and the second sealing nozzle are respectively used to block the upper and lower ports of the motor outer shell; a baffle, fixedly arranged on the pressure cylinder, located above the first sealing nozzle; an outer sleeve, slidably sleeved on the pressure cylinder, in sealing cooperation with the baffle, used to sleeve on the motor outer shell, and form a sealed space between the outer wall of the motor outer shell; an inner sleeve, arranged inside the outer sleeve, used to sleeve on the motor outer shell, and form a pressure measurement space between the outer wall of the motor outer shell; a pressure sensor, arranged inside the pressure cylinder; a first air pump, arranged on the frame, and conveys gas to the pressure cylinder through a pipeline; wherein, a first sealing structure is arranged on the outer sleeve, and a second sealing structure is arranged on the inner sleeve.

[0007] Through the provided first sealing nozzle and second sealing nozzle, the two ports of the motor outer shell are closed. At the same time, in cooperation with the outer sleeve, when the outer sleeve forms a sealed space with the motor outer shell, it can detect whether the second sealing nozzle seals the motor outer shell, avoiding detection errors caused by the second sealing nozzle not being blocked in place. Through the provided inner sleeve, different positions of the motor outer shell can be detected to determine whether there are breakage holes in the motor outer shell, and at the same time, the specific positions of the breakage and air leakage can be determined for subsequent improvement.

[0008] Further, the first sealing structure includes: a sealing groove arranged at the lower end of the outer sleeve, and a sealing capsule is arranged in the sealing groove. The sealing capsule expands to contact the lower end of the outer wall of the motor outer shell to form a sealed space; a ring plate is arranged at the upper end of the outer sleeve, and a sealing ring used to abut against the upper end of the baffle is arranged on the ring plate.

[0009] Through the provided sealing groove and sealing capsule, when the sealing groove moves to the lower end of the motor outer shell, the sealing capsule expands to abut against the lower end of the outer wall of the motor outer shell, thereby forming a sealed space with the motor outer shell to detect whether there is air leakage caused by the second sealing nozzle not being blocked in place.

[0010] Further, the inner sleeve includes: two annular flat plates arranged vertically, and annular side plates of the two annular flat plates; the second sealing structure includes: annular grooves are respectively opened in the annular flat plates, and the annular grooves on the two annular flat plates are communicated with each other. A sealing diaphragm is arranged on the side of the annular groove close to the motor outer shell; when the air pressure in the annular groove increases, the sealing diaphragm expands and deforms until it abuts against the outer wall of the motor outer shell.

[0011] Through the provided sealing diaphragm, when the air pressure in the annular groove increases, the annular film abuts against the outer wall of the motor housing, enabling the detection of the motor housing within the area between the two annular plates, thereby determining the specific location of the breakage or leak.

[0012] Furthermore, an annular groove is formed between the two annular plates and the annular side plate. An annular baffle for separating the annular groove is arranged between the two annular plates. The annular baffle divides the annular groove into a first area close to the motor housing and a second area on the side away from the motor housing. The second area is connected with a ventilation pipe communicating with the outside.

[0013] Through the provided first area and second area, when detecting, if there is a breakage or leak in the motor housing with the motor, gas will leak out through the ventilation pipe, and at this time, the breakage is within the area of the annular groove.

[0014] Furthermore, a rotating ring in rotational connection with and closely attached to the annular baffle is arranged in the second area. Through holes are formed in the annular baffle, and connection holes are formed in the rotating ring. The connection holes and the through holes are staggered or coincident to disconnect or connect the first area and the second area.

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

[0016] Furthermore, a pressure cylinder is arranged on the annular plate. The pressure cylinder is communicated with the annular groove. A piston plate is slidably arranged in the pressure cylinder. A piston rod with one end penetrating into the second area is fixedly connected to the piston plate. A pressure spring is connected between the piston plate and the inner wall of the pressure cylinder. A guiding groove is formed on the side wall of the rotating ring. One end of the piston rod is fixedly connected with a guiding block embedded and slidable in the guiding groove, and the guiding groove spirally extends 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, at this time, the sealing diaphragm expands and abuts against the outer wall of the motor housing. At this time, the pressure measurement space is sealed, and then under the action of the air pressure, the piston plate moves, pushing the piston rod and the guiding block to move, and then under the action of the guiding groove, the rotating ring rotates, making the connection hole and the through hole coincide.

[0018] Furthermore, a first cylinder is fixedly arranged on the baffle. One end of the piston rod of the first cylinder is fixedly connected to the inner sleeve. At the same time, a second air pump is also arranged on the inner sleeve. The second air pump is communicated with the annular groove through an air pipe.

[0019] The cylinder can drive the inner sleeve to move up and down, enabling the detection of different positions of the motor housing to determine the specific location of the air leakage and breakage.

[0020] Furthermore, an installation platform is fixedly arranged on the pressure cylinder. A two-way air pump is arranged on the installation platform. A sliding cylinder connected to the two-way air pump is fixedly arranged on the installation platform. A sliding plate is slidably connected in the sliding cylinder. The sliding plate is fixedly connected with a sliding pipe communicated with the sliding cylinder. One end of the sliding pipe is connected to the outer sleeve and communicated with the sealing capsule through a pipeline.

[0021] Through the arranged sliding cylinder and sliding pipe, when the two-way 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 limit position, the sealing groove is located at the lower end of the motor housing. At this time, the sealing capsule can abut against the lower end of the outer wall of the motor housing. After the outer sleeve moves to the limit position, the sealing capsule is inflated through the sliding pipe. At this time, a sealed space can be formed.

[0022] The beneficial effects of this application are as follows:

[0023] 1. Through the arranged first sealing nozzle and second sealing nozzle, the two ports of the motor housing are closed. At the same time, in cooperation 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 plugs the motor housing in place, avoiding detection errors caused by the second sealing nozzle not being plugged in place.

[0024] 2. Through the arranged inner sleeve, different positions of the motor housing can be detected to determine whether there are breakage holes in the motor housing. At the same time, the specific position of the breakage can be determined for subsequent improvement. When no breakage is detected in the motor housing and the first sealing nozzle is not plugged in place at this time, adjustment is required, which can avoid detection errors caused by the port not being plugged in place.

[0025] 3. Through the arranged rotating ring, when the sealing diaphragm does not contact the motor housing, the first area will not communicate with the second area, and the gas in the sealed space will not be discharged through the exhaust pipe, reducing the 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, making other features, purposes, and advantages of this application more obvious. The schematic embodiments and descriptions of the drawings of this application are used to explain this application and do not constitute an improper limitation of 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 the elements and elements are not necessarily drawn to scale.

[0028] In the drawings:

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

[0030] Figure 2Yes Figure 1 Schematic diagram of the installation of the outer sleeve in the embodiment

[0031] Figure 3 Yes Figure 2 Partial enlarged schematic diagram at position A in

[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 Cross-sectional structure diagram of the inner sleeve in the embodiment

[0034] Figure 6 Yes Figure 1 Schematic diagram of the installation of the rotating ring in the embodiment

[0035] Figure 7 Yes Figure 6 Partial enlarged schematic diagram at position B in

[0036] Reference numerals:

[0037] 10. Frame; 11. Cross beam; 12. Pressurizing cylinder; 13. Lifting member; 14. First sealing nozzle; 15. Placing table; 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. Installation table; 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 region; 39. Second region; 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 implementation manners

[0038] The embodiments of the present disclosure will be described in more detail below with reference to the drawings. Although some embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. On the contrary, these embodiments are provided to more thoroughly and completely understand the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are only for exemplary purposes and are not used to limit the protection scope of the present disclosure.

[0039] In addition, it should be noted that for the convenience of description, only the parts related to the relevant invention are shown in the drawings. Without conflict, the embodiments in the present disclosure and the features in the embodiments can be combined with each other.

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

[0041] It should be noted that the modification of "one" and "multiple" mentioned in the present disclosure is illustrative rather than restrictive. Those skilled in the art should understand that unless otherwise clearly specified in the context, it should be understood as "one or more".

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

[0043] Refer to Figure 1-7 , a sealing performance detection device for the motor housing used in thin coal seams, comprising: a frame 10, a cross beam 11, a pressure cylinder 12, a lifting member 13, a first sealing nozzle 14, a placement table 15, a second sealing nozzle 16, a baffle 17, an outer sleeve 18, and an inner sleeve 19. A cross beam 11 is provided on the frame 10, and a lifting member 13 is fixedly connected to the cross beam 11. The lifting member 13 is set as an electric slide rail, and the pressure cylinder 12 is installed on the electric slide rail, so that the pressure cylinder 12 moves up and down under the drive of the electric slide rail. A 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 through 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 block the upper port of the motor housing with the motor. The placement table 15 is provided on the frame 10, and the second sealing nozzle 16 is provided on the placement table 15 and is located below the first sealing nozzle 14 and is used to block the lower port of the motor housing. During detection, the motor housing is placed between the first sealing nozzle 14 and the second sealing nozzle 16, and air is introduced into the motor housing through the pressure cylinder 12 and the first blocking nozzle 14, and whether the air pressure can be maintained is detected by the pressure sensor 20 for sealing detection.

[0044] If the pressure sensor 20 detects that the air pressure continues to drop, since the motor housing and both the first sealing nozzle 14 and the second sealing nozzle 16 are pressed against the upper and lower ends of the motor housing by pressure, during detection, it may be due to the first sealing nozzle 14 and the second sealing nozzle 16 not being blocked in place, resulting in detection errors. Therefore, it is necessary to avoid affecting the detection due to not being blocked in place, and the following solution is adopted;

[0045] To avoid detection errors caused by the second sealing nozzle 16 not being properly blocked, in another embodiment, a baffle 17 is fixedly connected to the pressure cylinder 12, and an outer sleeve 18 with a sliding seal is sleeved on the baffle 17. By sliding the outer sleeve 18 downward, the outer sleeve 18 can be sleeved 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 that abuts against the baffle 17 is provided at the lower end of the ring plate 22. When the outer sleeve 18 moves to the lowermost position, the sealing ring 23 abuts against the baffle 17. A sealing groove 24 is provided at the lower end of the outer sleeve 18. When the outer sleeve 18 is in the lowermost position, the sealing groove 24 is directly opposite to the lower end position of the motor housing. A sealing bladder 25 is provided in the sealing groove 24. By expanding the sealing bladder 25 to contact the outer wall of the lower end 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 a decrease in air pressure, the outer sleeve 18 moves downward to the lowermost position, and a sealed space is formed through the sealing bladder 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 at this time, it means that the first sealing nozzle 14 is not properly blocked or the motor housing is damaged and leaking air; if the air pressure sensor 20 detects that the air pressure continues to drop, it means that the second sealing nozzle 16 is not properly blocked and needs to be adjusted.

[0048] In one embodiment, in order to ensure that the sealing bladder 25 expands only after the outer sleeve 18 moves to the lowermost position and avoid rubbing against the sealing bladder 25, causing damage to the sealing bladder 25, an installation platform 26 is fixedly provided on the pressure cylinder 12. A two-way air pump 27 is provided on the installation platform 26. A sliding cylinder 28 connected to the two-way air pump 27 is fixedly provided on the installation platform 26. A sliding plate 29 is slidably connected in the sliding cylinder 28. The sliding plate 29 is fixedly connected to a sliding tube 30 communicating with the sliding cylinder 28. One end of the sliding tube 30 is connected to the outer sleeve 18 and communicates with the sealing bladder 25 through a pipeline. When the two-way air pump 27 inflates the sliding cylinder 28, the sliding tube 30 will move, thereby causing the outer sleeve 18 to move downward. After the outer sleeve 18 moves downward to the limit position, the gas is discharged into the sealing bladder 25 through the sliding tube 30, and then the sealing bladder 25 expands. Similarly, when the outer sleeve 18 needs to be reset, the two-way air pump 27 pumps out the air in the sliding cylinder 28, which will first cause the sealing bladder to contract and then reset the outer sleeve 18.

[0049] To detect whether the motor housing is damaged and leaking air, and the location of the air leak, 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, and the inner sleeve 19 is arranged inside the outer sleeve 18. The inner sleeve 19 includes: two annular flat plates 33 arranged up and down, and annular side plates 34 of the two annular flat plates 33; annular grooves 32 are formed in the annular flat plates 33, and the annular grooves 32 on the two annular flat plates 33 communicate with each other. A sealing diaphragm 35 is arranged on the side of the annular groove 32 close to the motor housing. The sealing diaphragm 35 is a thin film structure made of rubber material, and it will bulge and expand towards the side close to the motor housing as the air pressure in the annular groove 32 increases. When the air pressure in the annular groove 32 increases, the sealing diaphragm 35 expands and deforms until one side abuts against the outer wall of the motor housing for sealing. A second air pump 36 is fixedly arranged on the inner sleeve 19. The second air pump 36 can inflate and deflate, and the second air pump 36 is connected to the annular groove 32 through a trachea. When it is necessary to detect whether the motor housing leaks air, gas is introduced into the annular groove 32 through the second air pump 36, so that the sealing diaphragm 35 expands and deforms, and then abuts against the motor housing.

[0050] An annular groove is formed between the two annular flat plates 33 and the annular side plates 34. An annular baffle 37 for separating the annular groove is arranged between the two annular flat plates 33. The annular baffle 37 divides the annular groove into a first area 38 close to the motor housing and a second area 39 on the side far from the motor housing. The first area 38 and the outer wall of the motor housing form a pressure measurement space. The second area 39 is connected to a ventilation pipe 40 communicating with the outside, and a through hole 41 is formed in the annular baffle 37. When the sealing diaphragm 35 abuts against the motor housing, if the motor housing is damaged and leaks air, the air in the motor housing will enter the first area 38 and the second area 39 under the action of air pressure and be discharged through the ventilation pipe 40. At this time, the air pressure sensor 20 detects a decrease in air pressure, indicating that the part of the motor housing in the pressure measurement area is damaged and leaks air.

[0051] Rotate and connect the rotating ring 42 that is in close contact with the annular baffle 37 within the second region 39. Through holes 41 are provided on the annular baffle 37, and connection holes 43 are provided on the rotating ring 42. When the connection holes 43 are offset from the through holes 41, the first region 38 is disconnected from the second region 39; when the connection holes 43 coincide with the through holes 41, the first region 38 communicates with the second region 39. A pressure cylinder 44 is provided on the annular flat plate 33. The pressure cylinder 44 communicates with the annular groove 32. A piston plate 45 is slidably arranged within the pressure cylinder 44. The piston plate 45 is fixedly connected to a piston rod 46 with one end penetrating into the second region 39. 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 provided on the side wall 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 on the outer surface of the rotating ring 42. When the second air pump 36 ventilates the annular groove 32, it will first cause the sealing diaphragm 35 to expand and deform. When a certain air pressure is reached within the annular groove 32, it will push the piston plate 45 to move, and then under the action of the piston rod 46, the guide block 49, and the guide groove 48, it will push the rotating ring 42 to rotate, causing the connection holes 43 to coincide with the through holes 41. Similarly, when the second air pump 36 deflates, it will first cause the connection holes 43 to be offset from the through holes 41, and then the sealing diaphragm 35 will return to its original state.

[0052] Driving the inner sleeve 19 to move up and down through the first cylinder 31 can detect different positions of the motor housing from top to bottom. At the same time, in cooperation with the outer sleeve 18, it avoids the situation that when there are multiple positions of damage and air leakage on the motor housing and the inner sleeve 19 is in a position with air leakage, the gas inside the motor housing leaks out through the damaged parts at other positions, affecting the detection.

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

[0054] During the working or installation process: In the initial state, the connection holes 43 are offset from the through holes 41, and both the outer sleeve 18 and the inner sleeve 19 are located above the first sealing nozzle 14.

[0055] 1. During detection, place the motor housing between the first sealing nozzle 14 and the second sealing nozzle 16. Drive the pressure cylinder 12 to move downward through 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. Ventilate the pressure cylinder 12 through the first air pump 21. The air pressure sensor 20 detects the air pressure within the pressure cylinder 12. If there is no air pressure drop, it indicates that the motor housing has no damage and air leakage; when the air pressure sensor 20 detects an air pressure drop, it indicates air leakage.

[0056] 2. At this time, there are three situations that cause air leakage. The first situation is that the first sealing nozzle 14 is not blocked in place, resulting in air leakage at the upper port of the casing. The second situation is that the second sealing nozzle 16 is not blocked in place, resulting in air leakage at the lower port of the casing. The third situation is that the motor housing itself is damaged and leaks air. By starting the two-way air pump 27 to ventilate into the sliding cylinder 28, the outer sleeve 18 moves downward until the sealing ring 23 abuts against the baffle 17. At this time, the outer sleeve 18 is in the lowest position and cannot continue to descend. The sealing groove 24 is facing the lower end of the outer wall of the motor housing. The two-way air pump 27 continues to ventilate into the sealing airbag through the sliding pipe 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 into the pressure cylinder 12, it means that the second sealing nozzle 16 is not blocked in place and the second sealing nozzle 16 needs to be adjusted or replaced. If the air pressure does not drop significantly, it means that the first sealing nozzle 14 is not blocked in place or the motor housing is damaged and leaks air.

[0057] 3. If the air pressure sensor 20 in step 2 detects that the air pressure does not drop significantly, 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. Then, the second air pump 36 is used to ventilate into the annular groove 32, so that the sealing diaphragm 35 abuts against the outer wall of the motor housing for sealing. Then, under the action of the air pressure in the annular groove 32, the piston plate 45 is driven to move. Under the action of the piston rod 46 and the guide block 49, the guide groove 48 is cooperated, so that the rotating ring 42 rotates, and the connecting hole 43 is aligned with the through hole 41. When the air leakage area of the motor housing is located at the annular groove position, the air in the motor housing is discharged through the ventilation pipe 40 under the action of the air pressure, and the air pressure sensor 20 will detect a drop in air pressure. By driving the inner sleeve 19 to move downward step by step through the first cylinder 31, the overall detection of the motor housing is realized, and the air leakage at different positions of the motor housing is detected.

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

[0059] The above description is only some preferred embodiments of the present disclosure and the description of the applied technical principles. 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 technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above inventive concept. For example, the technical solutions formed by mutually replacing the above features with the technical features (but not limited to) having 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: A frame (10) is provided with a crossbeam (11) on the frame (10), and a lifting member (13) is provided on the crossbeam (11), wherein: Also includes: A pressurizing cylinder (12) is mounted on the lifting member (13), and a first sealing nozzle (14) is provided at the lower end; A placement table (15) is arranged on the frame (10), and a second sealing nozzle (16) is arranged on the placement table (15) and is located at the lower side of the first sealing nozzle (14). The first sealing nozzle (14) and the second sealing nozzle (16) are respectively used to seal the upper and lower ports of the motor housing; A baffle (17) is fixedly mounted on the pressurizing cylinder (12) and is located above the first sealing nozzle (14); An outer sleeve (18) is slidably sleeved on the pressurizing cylinder (12), sealably matched with the baffle (17), and used to be sleeved on the motor housing to form a sealed space with the outer wall of the motor housing; An inner sleeve (19) is arranged inside the outer sleeve (18) 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 (20) is arranged in the pressurizing cylinder (12); A first air pump (21), which is arranged on the frame (10) and delivers gas to the pressurizing cylinder (12) through a pipeline; The outer sleeve (18) is provided with a first sealing structure, and the inner sleeve (19) is provided with a second sealing structure.

2. The device for detecting the sealing performance of a motor housing for a thin coal seam mine according to claim 1 is characterized in that: The first sealing structure comprises: A sealing groove (24) is arranged at the lower end of the outer sleeve (18), and a sealing bag (25) is arranged in the sealing groove (24). The sealing bag (25) expands and contacts the lower end of the outer wall of the motor housing to form a sealed space; A ring plate (22) is arranged at the upper end of the outer sleeve (18), and a sealing ring (23) is arranged on the ring plate (22) for abutting against the upper end of the baffle plate (17).

3. The device for detecting the sealing performance of a motor housing for a thin coal seam mine according to claim 1 is characterized in that: The inner sleeve (19) comprises: Two annular flat plates (33) arranged up and down, and annular side plates (34) of the two annular flat plates (33); The second sealing structure comprises: an annular groove (32) is provided in each annular plate (33), the annular grooves (32) on the two annular plates (33) are connected to each other, and a sealing diaphragm (35) is provided on one side of the annular groove (32) close to the motor housing; The air pressure in the annular groove (32) increases, causing the sealing diaphragm (35) to expand and deform until it abuts against the outer wall of the motor housing.

4. The device for detecting the sealing performance of a motor housing for a thin coal seam mine according to claim 3 is characterized in that: An annular groove is formed between the two annular flat plates (33) and the annular side plate (34); an annular baffle (37) for separating the annular groove is arranged between the two annular flat plates (33); the annular baffle (37) separates the annular groove into a first area (38) close to the motor housing and a second area (39) away from the motor housing; the second area (39) is connected to a vent pipe (40) communicating with the outside.

5. The device for detecting the sealing performance of a motor housing for a thin coal seam mine according to claim 4 is characterized in that: A rotating ring (42) tightly attached to the annular baffle (37) is rotatably connected in the second area (39); a through hole (41) is provided on the annular baffle (37); a connecting hole (43) is provided on the rotating ring (42); the connecting hole (43) and the through hole (41) are staggered so that the first area (38) and the second area (39) are disconnected; the connecting hole (43) and the through hole (41) are overlapped so that the first area (38) and the second area (39) are connected.

6. The device for detecting the sealing performance of a motor housing for a thin coal seam mine according to claim 5, characterized in that: A pressure cylinder (44) is arranged on the annular flat plate (33), and the pressure cylinder (44) is connected to the annular groove (32). A piston plate (45) is slidably arranged in the pressure cylinder (44), and the piston plate (45) is fixedly connected to a piston rod (46) having one end penetrating into the second area (39). 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 provided on the side wall of the rotating ring (42), and one end of the piston rod (46) is fixedly connected to a guide block (49) embedded in the guide groove (48) and sliding. The guide groove (48) extends spirally on the outer surface of the rotating ring (42).

7. The device for detecting the sealing performance of a motor housing for a thin coal seam mine according to claim 6, characterized in that: A first cylinder (31) is fixedly arranged on the baffle (17), one end of a piston rod (46) of the first cylinder (31) is fixedly connected to the inner sleeve (19), and a second air pump (36) is also arranged on the inner sleeve (19), and the second air pump (36) is connected to the annular groove (32) through an air pipe.

8. The device for detecting the sealing performance of a motor housing for a thin coal seam mine according to claim 2, characterized in that: The pressurizing cylinder (12) is fixedly provided with a mounting platform (26), a two-way air pump (27) is provided on the mounting platform (26), a sliding cylinder (28) connected to the two-way air pump (27) is fixedly provided on the mounting platform (26), a sliding plate (29) is slidably connected inside the sliding cylinder (28), the sliding plate (29) is fixedly connected with a sliding tube (30) 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 bag (25) through a pipeline.

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