Device and method for checking leakage of valve shell

Abstract

The invention discloses a valve shell leakage inspection device and method, and relates to the technical field of valve inspection, in particular to a valve shell leakage inspection device which comprises a shell, cover bodies are arranged on the left side and the right side of the shell, vacuum gauges are fixedly installed at the upper ends of the cover bodies, and exhaust pipes are fixedly connected to the back faces of the cover bodies. A plug is movably connected into the exhaust pipe in a sleeved mode. According to the valve shell leakage detection device and method, through cooperation of the shell, the vacuum pump, the cover bodies and the vacuum gauge and through arrangement of the cover bodies on the left side and the right side, the effect of sealing pipelines at the two ends of the shell at the same time is achieved, and the problem that the efficiency is low in the shell detection process is effectively solved; according to the utility model, the pipelines at the two ends of the shell are inspected at the same time, and the values of the vacuum counters are observed, so that the leakage conditions at the two ends of the shell can be directly observed, the number of workers is reduced, the shell inspection speed is accelerated, and the leakage inspection efficiency of the valve shell is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of valve inspection, and in particular to a device and method for inspecting valve housing leakage. Background Art

[0002] A valve is a device used to control the direction, pressure, and flow of a fluid in a fluid system. It is a device that allows the medium (liquid, gas, powder) in the piping and equipment to flow or stop and control its flow. In addition, the valve is also a control component in the pipeline fluid delivery system, used to change the passage section and the flow direction of the medium, and has the functions of diversion, cutoff, throttling, non-return, diversion or overflow pressure relief. The control of the valve can adopt a variety of transmission methods, such as manual, electric, hydraulic, pneumatic, turbine, electromagnetic, electromagnetic hydraulic, electro-hydraulic, gas-hydraulic, spur gear, bevel gear drive, etc.; it can act according to the predetermined requirements under the action of pressure, temperature or other forms of sensor signals, or simply open or close without relying on sensor signals. The valve relies on the drive or automatic mechanism to make the opening and closing parts move up and down, slide, swing or rotate, thereby changing the size of its flow area to achieve its control function.

[0003] However, after the valve has been used for a long time, it is inevitable that the valve joint will leak, resulting in a decrease in the air tightness of the valve. During the detection of valve leakage, the staff needs to check the pipes at both ends of the valve. When it is necessary to check the pipes at both ends at the same time, two staff members are required to use the inspection device to operate the pipes at both ends at the same time. This process will increase the number of staff members used, and when the pipes at both ends of the valve are checked in turn, this process will increase the work intensity of the staff. With the increasing number of valve housing leakage inspections, the method of checking the two ends of the valve in turn will make the staff prone to fatigue, which will not only reduce the efficiency of valve inspection, but also reduce the accuracy of the valve leakage inspection results. Summary of the invention

[0004] The present invention provides a device and method for inspecting valve housing leakage, which solves the problems raised by the above-mentioned background technology.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a valve housing leakage inspection device, comprising a housing, a cover body is provided on the left and right sides of the housing, a vacuum gauge is fixedly installed on the upper end of the cover body, an exhaust pipe is fixedly connected to the back side of the cover body, a plug is movably sleeved inside the exhaust pipe, movable rods located on the left and right sides of the exhaust pipe are fixedly installed on the left and right sides of the plug, a sleeve rod is movably sleeved on the outer wall of the movable rod, the inner wall of the sleeve rod is connected to the movable rod through a movable component, a moving component is fixedly installed on the outer side of the cover body, and the back side of the cover body is connected to a vacuum pump through a pipeline.

[0006] Optionally, an inlet pipe is fixedly installed on the left side of the shell, and the outer wall of the inlet pipe is movably connected to the inner wall of the left cover body. An exhaust pipe is fixedly installed on the right side of the shell, and the outer wall of the exhaust pipe is movably connected to the inner wall of the right cover body. The inner walls on the outside of the inlet pipe and the exhaust pipe are movably connected with sealing rings through rubber columns.

[0007] Optionally, legs are fixedly mounted on both the front and rear sides of the cover body, one end of the leg away from the cover body is fixedly connected to a roller, and a support rod is fixedly mounted on the outer side of the cover body.

[0008] Optionally, both left and right sides of the exhaust pipe are fixedly connected with round rods, the outer wall of the round rod is movably sleeved with an annular block, and the outer wall of the annular block is fixedly connected to one end of the sleeve rod.

[0009] Optionally, the movable component includes a spring, one end of which is connected to the inner wall of the sleeve rod, a baffle is installed at the end of the spring away from the sleeve rod, and one side of the baffle is fixedly connected to one end of the movable rod, and sliders are evenly distributed on the outer wall of the baffle, and the outer wall of the slider away from the end of the baffle is slidably connected to the inner wall of the sleeve rod.

[0010] Optionally, the motion component includes: an outer wall of the ball nut is fixedly connected to the lower end of the support rod, a ball screw is threadedly sleeved on the inner wall of the ball nut, and the outer walls of the ball screw on the left and right sides are provided with threads in opposite directions.

[0011] Optionally, the inner wall of the ball screw is fixedly sleeved with a rotating shaft, a servo motor is fixedly installed on the right end of the rotating shaft, and a reducer is arranged on the output shaft of the servo motor, the outer wall of the servo motor is fixedly sleeved with a chassis, the left side of the chassis is fixedly connected with a detection platform located below the shell, and the upper end of the detection platform is rollingly connected to the outer wall of the roller.

[0012] Optionally, an air intake pipe is fixedly installed on the upper end of the vacuum pump, and an end of the air intake pipe away from the vacuum pump is fixedly connected to a telescopic tube, and the end of the telescopic tube away from the vacuum pump is movably connected to the inner wall of the exhaust pipe, and the vacuum pump is fixed to the test bench by bolts.

[0013] A method for inspecting a valve housing leakage inspection device comprises the following steps:

[0014] S1. Fix the shell

[0015] First, move the inspection table to the corresponding working area, and then place the shell on the inspection table. Then, turn on the power of the servo motor. After the servo motor is turned on, it drives the rotation of the rotating shaft. The rotation of the rotating shaft drives the rotation of the ball screw at the same time. Due to the connection method of the ball nut and the ball screw threaded sleeve, the ball screw rotates in a circular direction and the ball nut moves in a horizontal direction at the same time. In addition, the outer walls of the ball screws on the left and right sides are provided with threads in opposite directions, so that when the ball screws on the left and right sides rotate, the ball nuts on their surfaces are driven to move toward the shell at the same time. Finally, the movement of the ball nut drives the cover body to move toward the shell through the connection of the support rod until the cover body on the left is inserted into the interior of the entrance pipe and the cover body on the right is inserted into the interior of the discharge pipe. Then the power of the servo motor can be turned off. At this time, the roller rolls on the inspection table while the cover body moves.

[0016] S2. Detect the shell

[0017] First, pull the seal out from the inside of the exhaust pipe. The movement of the seal drives the movement of the movable rod inside the sleeve rod. As the movable rod continues to move, the spring is stretched. The ring block is then rotated on the round rod to move the seal to the bottom of the exhaust pipe. At this time, since the telescopic tube itself is retractable, the stretched telescopic tube is inserted into the inside of the exhaust pipe. At this time, the exhaust pipe is connected to the vacuum pump. Then, turn on the power of the vacuum pump. The vacuum pump is turned on to vacuum the inside of the cover through the connection between the air inlet pipe and the telescopic tube. The vacuum pump on the left vacuums the inside of the inlet pipe to detect its leakage. The vacuum pump on the right vacuums the inside of the exhaust pipe to detect its leakage. Finally, the leakage situation inside the inlet pipe and the exhaust pipe can be judged by observing the values ​​on the vacuum gauges on the left and right sides.

[0018] S3. Remove the shell

[0019] First, after the shell leakage detection is completed, turn on the power of the servo motor to separate the left and right covers from the inlet pipe and the outlet pipe respectively. After the shell and the cover are separated, the shell can be removed from the inspection table. Then, separate the plug and the exhaust pipe, rotate the annular block on the round rod, and then stretch the spring to make the movable rod move inside the sleeve rod. When the plug rotates to the horizontal position with the exhaust pipe, release the plug and use the spring rebound to insert the plug into the exhaust pipe. Finally, compress the telescopic tube and put it neatly.

[0020] The present invention has the following beneficial effects:

[0021] 1. The valve housing leakage inspection device and method realizes the simultaneous sealing of the pipes at both ends of the housing through the coordination between the housing, vacuum pump, cover body and vacuum gauge, and utilizes the arrangement of the left and right cover bodies, effectively solving the problem of low efficiency in the housing inspection process. The leakage conditions at both ends of the housing can be directly observed by inspecting the pipes at both ends of the housing at the same time and observing the vacuum gauge value, which not only reduces the number of staff, but also speeds up the housing inspection, thereby improving the efficiency of valve housing leakage inspection.

[0022] 2. The device and method for inspecting valve housing leakage realize the movement of the housing through the coordination between the housing, the cover, the motion component and the servo motor, and utilize the setting of the motion component, thereby effectively solving the problem of different lengths of the valve housing pipelines. The servo motor is used to drive the movement of the left and right covers through the motion component, so that the distance between the left and right covers can be adjusted, thereby making the detection device better suitable for valve housings with different pipeline lengths, thereby improving the practicability of the detection device.

[0023] 3. The valve housing leakage inspection device and method, through the coordination among the housing, cover, roller and inspection platform, utilizes the setting of the roller, effectively solves the stability problem during the housing inspection process, and adopts the method of rolling the roller on the inspection platform to strengthen the stability of the cover after being connected to the housing, thereby also improving the accuracy of the data after the housing inspection. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the present invention;

[0025] Figure 2 It is a rear view of the vacuum pump in the structure of the present invention;

[0026] Figure 3 A side view of a moving component in the structure of the present invention;

[0027] Figure 4 It is a side view of the cover body in the structure of the present invention;

[0028] Figure 5 It is a side view of the support rod in the structure of the present invention;

[0029] Figure 6 A side view of the blockage in the structure of the present invention;

[0030] Figure 7 It is a cross-sectional view of the sleeve rod in the structure of the present invention;

[0031] Figure 8 In the structure of the present invention Figure 7 A magnified view of point A;

[0032] Fig. 9is a cross-sectional view of the discharge pipe in the structure of the present invention;

[0033] Fig.10 In the structure of the present invention Fig. 9 An enlarged view of point B.

[0034] In the figure: 1. shell; 2. cover; 3. vacuum gauge; 4. exhaust pipe; 5. plugging; 6. movable rod; 7. sleeve rod; 8. movable assembly; 801. spring; 802. baffle; 803. slider; 9. moving assembly; 901. ball nut; 902. ball screw; 10. vacuum pump; 11. inlet pipe; 12. outlet pipe; 13. sealing ring; 14. rubber column; 15. support leg; 16. roller; 17. support rod; 18. round rod; 19. ring block; 20. rotating shaft; 21. servo motor; 22. test bench; 23. chassis; 24. intake pipe; 25. telescopic tube. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] See also Figure 1 , Figure 4 and Fig. 9 The present invention provides a technical solution: a valve housing leakage inspection device, comprising a housing 1, a cover body 2 is provided on both sides of the left and right sides of the housing 1, a vacuum gauge 3 is fixedly installed on the upper end of the cover body 2, and the change of the value on the vacuum gauge 3 can be used to know the sealing condition inside the housing 1, and an exhaust pipe 4 is fixedly connected to the back of the cover body 2, and the exhaust pipe 4 is provided to connect the cover body 2 with a vacuum pump 10, and a plug 5 is movably sleeved inside the exhaust pipe 4, and movable rods 6 located on the left and right sides of the plug 5 are fixedly installed, and the outer wall of the movable rod 6 is movably sleeved with a sleeve rod 7, and the inner wall of the sleeve rod 7 is connected to the movable rod 6 through a movable component 8, and the setting of the movable component 8 serves to connect the movable rod 6 with the sleeve rod 7, and a moving component 9 is fixedly installed on the outer side of the cover body 2, and the back of the cover body 2 is connected to the vacuum pump 10 through a pipeline.

[0037] An inlet pipe 11 is fixedly installed on the left side of the shell 1, and the outer wall of the inlet pipe 11 is movably connected with the inner wall of the left cover body 2, and the left cover body 2 can seal the inlet pipe 11. An outlet pipe 12 is fixedly installed on the right side of the shell 1, and the right cover body 2 can seal the outlet pipe 12, and the outer wall of the outlet pipe 12 is movably connected with the inner wall of the right cover body 2, and the inner walls outside the inlet pipe 11 and the outlet pipe 12 are movably connected with a sealing ring 13 through a rubber column 14.

[0038] Legs 15 are fixedly installed on both the front and rear sides of the cover body 2. The end of the leg 15 away from the cover body 2 is fixedly connected to a roller 16. The movement of the roller 16 on the detection platform 22 strengthens the stability of the cover body 2 during movement and use. A support rod 17 is fixedly installed on the outer side of the cover body 2.

[0039] See also Figure 2 , Figure 3 , Figure 5 and Figure 8 The left and right sides of the exhaust pipe 4 are fixedly connected with round rods 18, and the outer wall of the round rod 18 is movably sleeved with an annular block 19, and the outer wall of the annular block 19 is fixedly connected to one end of the sleeve rod 7.

[0040] The movable component 8 includes a spring 801, and the elasticity of the spring 801 itself can realize the reset of the movable rod 6 after movement. One end of the spring 801 is connected to the inner wall of the sleeve rod 7, and a baffle 802 is installed at the end of the spring 801 away from the sleeve rod 7, and one side of the baffle 802 is fixedly connected to one end of the movable rod 6. The outer wall of the baffle 802 is evenly distributed with sliders 803, and the outer wall of the slider 803 away from the end of the baffle 802 is slidably connected to the inner wall of the sleeve rod 7.

[0041] The motion component 9 includes a ball nut 901, the outer wall of the ball nut 901 is fixedly connected to the lower end of the support rod 17, and the inner wall of the ball nut 901 is threadedly sleeved with a ball screw 902. The threaded sleeve connection method enables the circular rotation of the ball screw 902 to drive the horizontal movement of the ball nut 901, and the outer walls of the ball screws 902 on the left and right sides are provided with threads in opposite directions.

[0042] See also Fig.10 , Figure 6 and Figure 7 The inner wall of the ball screw 902 is fixedly sleeved with a rotating shaft 20, and a servo motor 21 is fixedly installed on the right end of the rotating shaft 20, and a reducer is arranged on the output shaft of the servo motor 21. The setting of the reducer serves to adjust the output shaft speed of the servo motor 21. The outer wall of the servo motor 21 is fixedly sleeved with a chassis 23, and the left side of the chassis 23 is fixedly connected with a detection table 22 located below the shell 1, and the upper end of the detection table 22 is rollingly connected to the outer wall of the roller 16.

[0043] An air intake pipe 24 is fixedly installed on the upper end of the vacuum pump 10, and a telescopic tube 25 is fixedly connected to the end of the air intake pipe 24 away from the vacuum pump 10, and the end of the telescopic tube 25 away from the vacuum pump 10 is movably connected to the inner wall of the exhaust pipe 4, and the vacuum pump 10 is fixed to the test bench 22 by bolts.

[0044] A method for inspecting a valve housing leakage inspection device comprises the following steps:

[0045] S1. Fixing the housing 1

[0046] First, move the inspection table 22 to the corresponding working area, and then place the shell 1 on the inspection table 22. Then, turn on the power of the servo motor 21. After the servo motor 21 is turned on, it drives the rotation of the rotating shaft 20. The rotation of the rotating shaft 20 drives the rotation of the ball screw 902 at the same time. Due to the threaded connection between the ball nut 901 and the ball screw 902, the ball screw 902 rotates in a circular direction and the ball nut 901 moves in a horizontal direction at the same time. In addition, the outer walls of the ball screws 902 on the left and right sides are provided with threads in opposite directions, so that when the ball screws 902 on the left and right sides rotate, the ball nuts 901 on their surfaces are driven to move toward the shell 1 at the same time. Finally, the movement of the ball nut 901 drives the cover body 2 to move toward the shell 1 through the connection of the support rod 17, until the cover body 2 on the left is inserted into the interior of the entrance tube 11 and the cover body 2 on the right is inserted into the interior of the discharge tube 12, and then the power of the servo motor 21 can be turned off. At this time, while the cover body 2 moves, the roller 16 rolls on the inspection table 22.

[0047] S2. Detecting the shell 1

[0048] First, pull the plug 5 out from the inside of the exhaust pipe 4. The movement of the plug 5 drives the movement of the movable rod 6 inside the sleeve rod 7. As the movable rod 6 continues to move, the spring 801 is stretched. Then, by rotating the annular block 19 on the round rod 18, the plug 5 can be moved to the bottom of the exhaust pipe 4. At this time, since the telescopic tube 25 itself is retractable, the stretched telescopic tube 25 is inserted into the inside of the exhaust pipe 4. At this time, the exhaust pipe 4 is connected to the vacuum pump 10. Then, turn on the power of the vacuum pump 10. The vacuum pump 10 is turned on to evacuate the inside of the cover body 2 through the connection between the air inlet pipe 24 and the telescopic tube 25. The vacuum pump 10 on the left side evacuates the inside of the inlet pipe 11 to detect its leakage. The vacuum pump 10 on the right side evacuates the inside of the exhaust pipe 12 to detect its leakage. Finally, the values ​​on the vacuum gauges 3 on the left and right sides can be observed to determine the leakage inside the inlet pipe 11 and the exhaust pipe 12.

[0049] S3, dismantle the shell 1

[0050] First, after the leakage detection of the shell 1 is completed, turn on the power of the servo motor 21, so that the cover body 2 on the left and right sides is separated from the inlet pipe 11 and the outlet pipe 12 respectively. After the shell 1 and the cover body 2 are separated, the shell 1 can be removed from the inspection table 22, and then, separate the plug 5 and the exhaust pipe 4, rotate the annular block 19 on the round rod 18, and then stretch the spring 801 to make the movable rod 6 move inside the sleeve rod 7. When the plug 5 rotates to a horizontal position with the exhaust pipe 4, release the plug 5, and use the rebound of the spring 801 to insert the plug 5 into the exhaust pipe 4. Finally, compress the telescopic tube 25 and put it neatly.

[0051] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not expressly listed, or also includes elements inherent to such process, method, article, or apparatus.

[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A valve housing leakage inspection device, comprising a housing (1), characterized in that: A cover body (2) is provided on both the left and right sides of the shell (1); a vacuum gauge (3) is fixedly mounted on the upper end of the cover body (2); a vacuum pipe (4) is fixedly connected to the back of the cover body (2); a plug (5) is movably sleeved inside the vacuum pipe (4); movable rods (6) located on the left and right sides of the vacuum pipe (4) are fixedly mounted on both the left and right sides of the plug (5); a sleeve rod (7) is movably sleeved on the outer wall of the movable rod (6); the inner wall of the sleeve rod (7) is connected to the movable rod (6) via a movable component (8); a moving component (9) is fixedly mounted on the outer side of the cover body (2); and the back of the cover body (2) is connected to a vacuum pump (10) via a pipeline.

2. A valve housing leakage inspection device according to claim 1, characterized in that: An inlet pipe (11) is fixedly mounted on the left side of the shell (1), and the outer wall of the inlet pipe (11) is movably sleeved with the inner wall of the left cover body (2); an outlet pipe (12) is fixedly mounted on the right side of the shell (1), and the outer wall of the outlet pipe (12) is movably sleeved with the inner wall of the right cover body (2); the inner walls of the outer sides of the inlet pipe (11) and the outlet pipe (12) are movably sleeved with sealing rings (13) via rubber columns (14).

3. A valve housing leakage inspection device according to claim 1, characterized in that: Support legs (15) are fixedly mounted on both the front and rear sides of the cover body (2); one end of the support leg (15) away from the cover body (2) is fixedly connected to a roller (16); and a support rod (17) is fixedly mounted on the outer side of the cover body (2).

4. A valve housing leakage inspection device according to claim 1, characterized in that: The left and right sides of the exhaust pipe (4) are both fixedly connected with round rods (18), the outer wall of the round rod (18) is movably sleeved with an annular block (19), and the outer wall of the annular block (19) is fixedly connected to one end of the sleeve rod (7).

5. A valve housing leakage inspection device according to claim 1, characterized in that: The movable component (8) comprises a spring (801), one end of which is connected to the inner wall of the sleeve rod (7); a baffle (802) is installed at the end of the spring (801) away from the sleeve rod (7), and one side of the baffle (802) is fixedly connected to one end of the movable rod (6); sliding blocks (803) are evenly distributed on the outer wall of the baffle (802), and the outer wall of the sliding block (803) away from the end of the baffle (802) is slidably connected to the inner wall of the sleeve rod (7).

6. A valve housing leakage inspection device according to claim 1, characterized in that: The motion assembly (9) comprises a ball nut (901), the outer wall of the ball nut (901) is fixedly connected to the lower end of the support rod (17), the inner wall of the ball nut (901) is threadedly sleeved with a ball screw (902), and the outer walls of the ball screws (902) on the left and right sides are provided with threads in opposite directions.

7. A valve housing leakage inspection device according to claim 6, characterized in that: The inner wall of the ball screw (902) is fixedly sleeved with a rotating shaft (20), the right end of the rotating shaft (20) is fixedly mounted with a servo motor (21), and a reducer is arranged on the output shaft of the servo motor (21), the outer wall of the servo motor (21) is fixedly sleeved with a chassis (23), the left side of the chassis (23) is fixedly connected with a detection platform (22) located below the housing (1), and the upper end of the detection platform (22) is rollingly connected to the outer wall of the roller (16).

8. A valve housing leakage inspection device according to claim 1, characterized in that: An air intake pipe (24) is fixedly mounted on the upper end of the vacuum pump (10); an end of the air intake pipe (24) away from the vacuum pump (10) is fixedly connected to a telescopic pipe (25); and an end of the telescopic pipe (25) away from the vacuum pump (10) is movably sleeved with the inner wall of the exhaust pipe (4); and the vacuum pump (10) is fixed to the inspection table (22) by bolts.

9. A method for testing a valve housing leakage testing device according to any one of claims 1 to 8, characterized in that: The following steps are included S1. Fixing the housing (1) First, the inspection table (22) is moved to the corresponding working area, and then the housing (1) is placed on the inspection table (22). Then, the power supply of the servo motor (21) is turned on. After the servo motor (21) is turned on, it drives the rotation of the rotating shaft (20). The rotation of the rotating shaft (20) drives the rotation of the ball screw (902). Due to the threaded sleeve connection between the ball nut (901) and the ball screw (902), the ball screw (902) rotates in a circular direction and the ball nut (901) moves in a horizontal direction. In addition, the outer walls of the ball screw (902) on the left and right sides are provided with The threads in opposite directions enable the ball screws (902) on the left and right sides to rotate, thereby driving the ball nuts (901) on their surfaces to move toward the housing (1) at the same time. Finally, the movement of the ball nuts (901) drives the cover body (2) to move toward the housing (1) through the connection of the support rod (17), until the cover body (2) on the left side is inserted into the interior of the entry tube (11) and the cover body (2) on the right side is inserted into the interior of the discharge tube (12). Then, the power supply of the servo motor (21) can be turned off. At this time, while the cover body (2) moves, the roller (16) rolls on the detection table (22). S2. Detecting the shell (1) First, the plug (5) is pulled out from the inside of the exhaust pipe (4). The movement of the plug (5) drives the movable rod (6) inside the sleeve rod (7). As the movable rod (6) continues to move, the spring (801) is stretched. Then, by rotating the annular block (19) on the round rod (18), the plug (5) can be moved to the bottom of the exhaust pipe (4). At this time, since the telescopic tube (25) itself is telescopic, the stretched telescopic tube (25) is inserted into the inside of the exhaust pipe (4). At this time, the exhaust pipe (4) and the vacuum pump (10) are connected. Then, the power of the vacuum pump (10) is turned on. The vacuum pump (10) is turned on to evacuate the interior of the cover body (2) through the connection of the air inlet pipe (24) and the telescopic pipe (25). The vacuum pump (10) on the left side evacuates the interior of the inlet pipe (11) to detect its leakage. The vacuum pump (10) on the right side evacuates the interior of the outlet pipe (12) to detect its leakage. Finally, the values ​​on the vacuum gauges (3) on the left and right sides can be observed to determine the leakage of the interior of the inlet pipe (11) and the outlet pipe (12). S3. Dismantle the housing (1) First, after the leakage detection of the shell (1) is completed, the power supply of the servo motor (21) is turned on, so that the cover bodies (2) on the left and right sides are separated from the inlet pipe (11) and the outlet pipe (12) respectively. After the shell (1) and the cover body (2) are separated, the shell (1) can be removed from the detection table (22), and then the plug (5) and the exhaust pipe (4) are separated, and the annular block (19) is rotated on the round rod (18), and then the spring (801) is stretched to make the movable rod (6) move inside the sleeve rod (7). When the plug (5) rotates to a horizontal position with the exhaust pipe (4), the plug (5) is released, and the plug (5) is inserted into the interior of the exhaust pipe (4) by using the rebound of the spring (801). Finally, the telescopic tube (25) is compressed and neatly placed.

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