Plunger pump valve body sealing test device and multi-point observation method thereof

Abstract

The invention discloses a plunger pump valve body sealing performance test device and a multi-point observation method thereof, and relates to the technical field of valve body sealing performance detection, and the plunger pump valve body sealing performance test device comprises an airtightness detection cabinet main body, a test part and an auxiliary detection part. According to the invention, the sealing performance of the valve body can be detected, the motion state of the valve body in the pump body is simulated by adopting a relatively close mode in the detection process, and a detector or an observer can observe whether the sealing performance of the valve body reaches the standard from two angles; the equipment utilizes two modes to enable an observer to clearly know the working state of the valve body, namely the state of the valve body block in a test part, the work can be conveniently explained to the observer, the multiple driving modes of the equipment adopt an automatic mechanical structure, and compared with an existing detection mode, the equipment has the advantages that the detection efficiency is greatly improved, and the detection cost is reduced. The detection time proportion is greatly reduced, the detection process is optimized, and the device is endowed with a demonstration function, so that the device has multiple advantages of detection or demonstration.

Description

Technical Field

[0001] The invention relates to the technical field of valve body sealing detection, in particular to a plunger pump valve body sealing test device and a multi-point observation method thereof. Background Art

[0002] A plunger pump is a device for conveying liquids. The working principle of a plunger pump is to suck in and squeeze out liquids by causing the volume in the sealed chamber to change through the reciprocating motion of the plunger in the cylinder. The valve body and valve seat inside the plunger pump are hydraulic locking mechanisms that control the unidirectional flow of liquid in the pump at the hydraulic end of the plunger pump. The valve body is a key accessory for the pump body. It is made of alloy steel through a strict and reasonable heat treatment process. It has a high surface hardness and good toughness and can resist fatigue and impact. The design and manufacture of the valve body is intended to ensure the efficient and reliable operation of the mud pump. It is usually used together with components such as the valve seat, valve gland, valve rubber and valve spring to form a valve assembly. These components work together to ensure that the mud pump can maintain stable performance under various working conditions.

[0003] There are few valve body sealing test equipment based on plunger pumps on the market.

[0004] The inventors believe that:

[0005] The sealing performance of the valve body rubber ring of the plunger pump is particularly important (if there is a problem with the sealing, the pump body will directly fail to work). During the production of the valve body or the assembly of the rubber ring, or when the valve body has been replaced after a long period of use, the sealing performance is generally tested by installing the valve body in the pump body. This sealing performance test method is very time-consuming, as the valve body needs to be installed in the base (because the valve seat is equipped with a spring for returning the valve body to its original position), and then the valve seat is installed in the pump body. For the valve body manufacturer, it is impossible to provide the buyer with a visual valve body detection method, and it also wastes a lot of time in the daily sampling test of the valve body sealing performance. Summary of the invention

[0006] The purpose of the present invention is to provide a plunger pump valve body sealing test device and a multi-point observation method thereof, so as to solve the problem raised in the above background technology that valve body manufacturers cannot provide buyers with an intuitive and visual valve body detection method, and also waste a lot of time in daily sampling inspection of valve body sealing.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A plunger pump valve body sealing test device, comprising an airtight detection cabinet main body, a test component and an auxiliary detection component;

[0009] The test component is installed in the middle of the main body of the airtight detection cabinet, an auxiliary detection component is arranged below the test component, a second driving component is installed on the left and right sides of the test component, and a first driving component is installed above the test component;

[0010] The test component comprises a mounting plate, a first slot, a rubber ring, a first fixing member and a conical spring. The outer wall of the mounting plate is provided with two first slots, the inner wall of the first slot is fixedly connected to the first fixing member, the conical spring is fixedly connected below the first fixing member, the rubber ring is arranged outside the conical spring, the rubber ring is bonded below the mounting plate, and a first driving member is arranged above the test component;

[0011] The auxiliary detection components include a water barrier box, a water trough, a limiting side rod, a second slot hole, a sealing groove, a mounting side plate and a bottom sealing ring. The water trough is provided in the middle of the water barrier box, the mounting side plate is bonded on the top of the water barrier box, four limiting side rods are fixed on the top of the water barrier box, two second slot holes are provided on the outer wall of the mounting side plate, a valve block is placed in the middle of the second slot hole, and a liquid pipeline is installed on the left side of the water barrier box;

[0012] A conveying box is installed below the main body of the airtight detection cabinet, a water pump is arranged inside the conveying box, and a partition is installed at the front side of the auxiliary detection component.

[0013] In an optional embodiment, the partition, the mounting plate, the mounting side plate and the watertight box are all made of plexiglass.

[0014] In an optional embodiment, the first driving component includes an installation box, a limiting top rod, a driving wheel, a driving member, a limiting block, a driving rod, a driving motor, an auxiliary wheel, a support block and a driving belt. Two limiting top rods are installed below the installation box, the driving wheel is installed in the middle of the installation box, the outer wall of the driving wheel is fixedly connected to the driving rod, the driving member is installed on the outer side of the limiting block, the limiting block is sleeved on the outer wall below the driving member, the bottom end of the driving member is fixedly connected to the limiting top rod, the driving motor is installed in the middle of the two driving wheels, the driving belt is installed at the output end of the driving motor, and a support block is provided at the connection between the driving wheel and the installation box.

[0015] In an optional embodiment, the second driving component includes a side frame, a connecting plate, a screw rod, a limit rod and a moving block, the connecting plate is provided on one side of the side frame close to the mounting plate, the connecting plate is fixedly connected to the mounting plate, the screw rod is installed in the middle of the side frame, the limit rod is provided on one side of the screw rod, the moving block is threadedly connected to the outer wall of the screw rod, and the outer wall of the moving block is fixedly connected to the connecting plate.

[0016] In an optional embodiment, the limiting push rod and the valve body block are located on the same central axis, and downward movement of the limiting push rod will cause the rubber on the bottom side of the valve body block to fit tightly with the bottom sealing ring.

[0017] In an optional embodiment, light strips are installed inside the mounting side plate and the mounting plate, and the light strips are externally connected to a battery via a connecting wire.

[0018] In an optional embodiment, a bottom plate above the main body of the airtight detection cabinet is provided with a trough for liquid to flow downward, and a water storage tank is provided below the delivery box.

[0019] A multi-point observation method for a plunger pump valve body sealing test is implemented according to a plunger pump valve body sealing test device, and the method comprises the following steps:

[0020] S1: After placing the valve block in the second slot, the bottom sealing ring will support it, and the staff will control the pump body of the conveying box to test the valve block.

[0021] S2: There are two modes for detecting vane blocks:

[0022] (i) The limiting push rod does not touch the top of the valve block, and the liquid will push the valve block out. Onlookers and experimenters can observe the liquid passing through the surface of the valve block through the organic glass material;

[0023] (ii) The limiting push rod contacts the top of the valve block, the valve block is in a sealed state, and the liquid does not leak out. The observer can observe whether there is liquid leakage from the second slot hole and the first slot hole, thereby judging the sealing performance of the valve block.

[0024] S3: During the inspection, both sides of the airtight inspection cabinet can be observed in multiple directions through the organic glass material. If a relatively dim environment is encountered, auxiliary observation can be carried out by turning on the light.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0026] The present invention can detect the sealing performance of the valve body itself. During the detection process, a relatively close method is used to simulate the movement state of the valve body in the pump body. The detection personnel or observers can observe whether the sealing performance of the valve body itself meets the standard from two angles. The device itself uses two modes to let the observer clearly know the working state of the valve body, that is, the state of the valve body block in the test component, which is also convenient for explaining to the observer. Various driving modes of the device all adopt an automated mechanical structure. Compared with the existing detection method, the proportion of detection time is greatly reduced, the detection process is optimized, and the device is given a demonstration function, so that the device has multiple advantages of detection or demonstration. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0028] Figure 2 It is a schematic diagram of the partial explosion structure of the present invention;

[0029] Figure 3 It is a schematic diagram of a partial cross-sectional structure of the present invention;

[0030] Figure 4 It is a front view structural schematic diagram of the present invention;

[0031] Figure 5 It is a schematic diagram of the three-dimensional structure of the present invention;

[0032] Figure 6 It is a schematic diagram of the front cross-section structure of the present invention;

[0033] Figure 7 for Figure 6 A schematic diagram of the enlarged structure at point A;

[0034] Figure 8 It is a schematic diagram of the front cross-section structure of the first driving component of the present invention;

[0035] Fig. 9 It is a partial top view of the structure of the first driving component of the present invention.

[0036] In the figure:

[0037] 1. Airtightness detection cabinet body; 2. First driving component; 201. Installation box; 202. Limiting rod; 203. Driving wheel; 204. Driving member; 205. Limiting block; 206. Driving rod; 207. Driving motor; 208. Auxiliary wheel; 209. Support block; 210. Driving belt; 3. Second driving component; 301. Side frame; 302. Connecting plate; 303. Screw rod; 304. Limiting rod; 305. Moving block ; 4. Test component; 401. Mounting plate; 402. First slot; 403. Rubber ring; 404. First fixing piece; 405. Conical spring; 5. Partition; 6. Auxiliary detection component; 601. Waterproof box; 602. Water tank; 603. Limiting side rod; 604. Second slot; 605. Sealing groove; 606. Mounting side plate; 607. Bottom sealing ring; 7. Valve block; 8. Delivery box; 9. Liquid pipeline; 10. Light strip. DETAILED DESCRIPTION

[0038] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0039] In order to solve the problem that valve body manufacturers cannot provide buyers with a visual valve body detection method, and also waste a lot of time in daily sampling and testing of valve body sealing, the present invention provides the following embodiments:

[0040] like Figure 1-9 As shown, a plunger pump valve body sealing test device includes an airtight detection cabinet body 1, a test component 4 and an auxiliary detection component 6; the test component 4 is installed in the middle of the airtight detection cabinet body 1, and the auxiliary detection component 6 is arranged below the test component 4, the second drive component 3 is installed on the left and right sides of the test component 4, and the first drive component 2 is installed above the test component 4, the purpose of the present invention is to detect the sealing of the valve body itself, and a relatively close method is adopted in the detection process to simulate the movement state of the valve body in the pump body, and the detection personnel or the observer can observe whether the sealing of the valve body itself meets the standard from two angles, and the device itself uses two modes to let the observer clearly know the working state of the valve body, that is, the state of the valve body block 7 in the test component 4, which is also convenient for explaining to the observer, and the various driving modes of the device all adopt an automated mechanical structure, compared with the existing detection method, the proportion of detection time is greatly reduced, the detection process is optimized, and the device is given the function of demonstration, so that the device has multiple advantages of detection or demonstration;

[0041] like Figure 2 , Figure 3 and Figure 7As shown, the test component 4 includes a mounting plate 401, a first slot 402, a rubber ring 403, a first fixing member 404 and a conical spring 405. Two first slots 402 are formed through the outer wall of the mounting plate 401. The first fixing member 404 is fixedly connected to the inner wall of the first slot 402. A conical spring 405 is fixedly connected below the first fixing member 404. A rubber ring 403 is arranged on the outer side of the conical spring 405. The rubber ring 403 is bonded to the bottom of the mounting plate 401. A first driving component 2 is arranged above the test component 4. The auxiliary detection component 6 includes a water barrier box 601, a water tank 602, a limiting side rod 603, a second slot 604, a sealing groove 605, and a mounting side plate. 606 and bottom sealing ring 607, a water tank 602 is provided in the middle of the watertight box 601, a mounting side plate 606 is bonded on the top of the watertight box 601, four limiting side rods 603 are fixed on the top of the watertight box 601, two second slots 604 are provided on the outer wall of the mounting side plate 606, a valve block 7 is placed in the middle of the second slot 604, a liquid pipeline 9 is installed on the left side of the watertight box 601, wherein the mounting plate 401 moves downward to contact the mounting side plate 606, at which time the rubber ring 403 is completely fitted with the sealing groove 605, so the first slot 402 and the second slot 604 are sealed, and the conical spring 405 on the bottom side of the first fixing member 404 contacts the valve block 7;

[0042] The valve body block 7 is composed of a rubber ring and a valve body;

[0043] A delivery box 8 is installed below the main body 1 of the airtight detection cabinet. A water pump is arranged inside the delivery box 8. A partition 5 is installed on the front side of the auxiliary detection component 6. The liquid below the delivery box 8 is pumped to the top by the internal water pump. If the limiting push rod 202 does not abut against the valve block 7, the liquid pushes the valve block 7 upward and then overflows to the outside through the second slot 604 and the first slot 402.

[0044] The specific implementation is as follows:

[0045] When the limiting push rod 202 moves downward, it will contact the valve block 7, so that the valve block 7 fits tightly in the bottom sealing ring 607 in the middle of the second slot 604. At this time, the staff starts the pump body inside the delivery box 8. If the sealing is intact, the water tank 602 of the watertight box 601 is in a state, and the water pump cannot transport the liquid to the second slot 604. At this time, the staff can continue to start the drive motor 207 to make the drive wheel 203 work, and then reset the limiting push rod 202. At this time, there is only the conical spring 405 on the top of the valve block 7 as a support, and then start the water pump inside the delivery box 8 again. Onlookers or experimenters can clearly see that the liquid pushes the valve block 7 and the conical spring 405 upward, and then the sealing of the rubber ring of the valve block 7 can be known.

[0046] In an optional embodiment, the partition 5, the mounting plate 401, the mounting side plate 606 and the water barrier box 601 are all made of plexiglass. The plexiglass material in the form of an acrylic sheet allows the observer or inspector to intuitively see the movement state of the vane block 7.

[0047] like Figure 2 , Figure 8 and Fig. 9 As shown, the first driving component 2 includes an installation box 201, a limiting top rod 202, a driving wheel 203, a driving member 204, a limiting block 205, a driving rod 206, a driving motor 207, an auxiliary wheel 208, a support block 209 and a driving belt 210. Two limiting top rods 202 are installed below the installation box 201, a driving wheel 203 is installed in the middle of the installation box 201, the driving wheel 203 is fixedly connected to the driving rod 206 on the outer wall of the driving wheel 203, a driving member 204 is installed on the outer side of the limiting block 205, a limiting block 205 is sleeved on the outer wall below the driving member 204, the bottom end of the driving member 204 is fixedly connected to the limiting top rod 202, a driving motor 207 is installed in the middle of the two driving wheels 203, a driving belt 210 is installed at the output end of the driving motor 207, and a support block 209 is provided at the connection between the driving wheel 203 and the installation box 201;

[0048] The specific implementation is as follows:

[0049] After the driving motor 207 is started, the auxiliary wheel 208 at the output end will rotate. The auxiliary wheel 208 makes the auxiliary wheels 208 on both sides rotate in the same direction through the driving belt 210 on the outer wall, thereby rotating the driving wheel 203. The driving wheel 203 makes the driving member 204 limit the driving rod 206 to allow the limiting top rod 202 at the bottom to move up and down. When the limiting top rod 202 moves downward, it will contact the valve block 7. Only when the support block 209 contacts the valve block 7 will the first slot 402 and the second slot 604 remain completely closed, thereby preventing the liquid from flowing upward.

[0050] like Figure 4 As shown, the second driving component 3 includes a side frame 301, a connecting plate 302, a screw rod 303, a limiting rod 304 and a moving block 305. A connecting plate 302 is arranged on one side of the side frame 301 close to the mounting plate 401, and the connecting plate 302 is fixedly connected to the mounting plate 401. A screw rod 303 is installed in the middle of the side frame 301, and a limiting rod 304 is arranged on one side of the screw rod 303. A moving block 305 is threadedly connected to the outer wall of the screw rod 303, and the outer wall of the moving block 305 is fixedly connected to the connecting plate 302. A motor is installed at the bottom end of the screw rod 303, and the motor is fixedly connected to the inner wall of the side frame 301. The motor is a servo motor, which can realize forward and reverse rotation, thereby making the connecting plate 302 move up and down. The purpose of the downward movement of the connecting plate 302 is to allow the conical spring 405 to contact the valve block 7.

[0051] The specific implementation is as follows:

[0052] Start the motor of the screw rod 303 and the drive motor 207. When the motor of the screw rod 303 is working, the screw rod 303 rotates. At this time, the moving block 305 on its outer wall will move up or down through the limit rod 304, and the moving block 305 will drive the mounting plate 401 to move in the same position through the connecting plate 302.

[0053] As an implementation method, the limiting push rod 202 and the valve body block 7 are on the same central axis. When the limiting push rod 202 moves downward, it will push the valve body block 7 downward. The downward movement of the limiting push rod 202 will cause the rubber on the bottom side of the valve body block 7 to fit tightly with the bottom sealing ring 607. After the valve body block 7 and the bottom sealing ring 607 are limited, the pump body cannot transport the liquid upward.

[0054] As an implementation mode, a light strip 10 is installed inside the mounting side plate 606 and the mounting plate 401. The light strip 10 is connected to an external battery via a connecting line. Under dim conditions, detection can also be assisted by the light strip 10 for observation.

[0055] As an implementation mode, a trough for liquid to flow downward is provided on the bottom plate above the main body 1 of the airtight detection cabinet, and a water storage tank is provided below the delivery box 8. The liquid overflowing from the first slot 402 will flow through the trough to the water storage tank of the delivery box 8 to facilitate the next sealing test and can be recycled.

[0056] A multi-point observation method for a plunger pump valve body sealing test is implemented according to a plunger pump valve body sealing test device, and the method comprises the following steps:

[0057] S1: After placing the valve block 7 in the second slot 604, the bottom sealing ring 607 will support it, and the staff will control the pump body of the conveying box 8 to test the valve block 7.

[0058] S2: The detection of the vane block 7 is divided into two modes:

[0059] (i) When the limiting push rod 202 does not contact the top of the valve block 7, the liquid will push the valve block 7 out, and the onlookers and experimenters can observe the liquid passing through the surface of the valve block 7 through the organic glass material;

[0060] (ii) The limiting push rod 202 contacts the top of the valve block 7, the valve block 7 is in a sealed state, and the liquid does not leak out. The observer can observe whether there is liquid leakage from the second slot hole 604 and the first slot hole 402, thereby judging the sealing performance of the valve block 7.

[0061] S3: During the inspection, both sides of the airtight inspection cabinet body 1 can be observed in multiple directions through the organic glass material. If a relatively dim environment is encountered, auxiliary observation can be performed by turning on the light strip 10.

[0062] Working principle:

[0063] When the plunger pump valve body sealing test device is in use, the staff first places the valve body block 7 in the first slot 402 of the mounting plate 401, and then starts the motor of the screw rod 303 and the drive motor 207. When the motor of the screw rod 303 is working, the screw rod 303 rotates, and the moving block 305 on its outer wall can realize up or down movement through the limit rod 304, and the moving block 305 drives the mounting plate 401 to move in the same position through the connecting plate 302, which will make the conical spring 405 of the mounting plate 401 contact the upper outer wall of the valve body block 7, and then imitate the state of the valve body block 7 when being limited by the valve seat spring in the pump body, and the rubber ring 403 increases the sealing of the channel. After the drive motor 207 is started, the auxiliary wheel 208 at the output end will rotate, and the auxiliary wheel 208 makes the auxiliary wheels 208 on both sides rotate in the same direction through the driving belt 210 on the outer wall, thereby rotating the drive wheel 203, and the drive wheel 203 The driving member 204 will limit the driving rod 206 to allow the limiting top rod 202 at the bottom to move up and down. When the limiting top rod 202 moves downward, it will contact the valve block 7, so that the valve block 7 is tightly fitted in the bottom sealing ring 607 in the middle of the second slot 604. At this time, the staff starts the pump body inside the conveying box 8. If the sealing is intact, the water tank 602 of the water barrier box 601 is in a state, and the water pump cannot convey the liquid to the second slot 604. At this time, the staff can continue to start the driving motor 207 to make the driving wheel 203 work, and then reset the limiting top rod 202. At this time, there is only the conical spring 405 on the top of the valve block 7 as a support, and then the water pump inside the conveying box 8 is started again. Onlookers or experimenters can clearly see that the liquid pushes the valve block 7 and the conical spring 405 upward, and then the sealing of the rubber ring of the valve block 7 can be known. During the experiment, the light strip 10 can also be used to assist in observation.

[0064] The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A plunger pump valve body sealing test device, characterized in that: It includes the main body of the airtight testing cabinet, test components and auxiliary testing components; The test component is installed in the middle of the main body of the airtight detection cabinet, an auxiliary detection component is arranged below the test component, a second driving component is installed on the left and right sides of the test component, and a first driving component is installed above the test component; The test component comprises a mounting plate, a first slot, a rubber ring, a first fixing member and a conical spring. The outer wall of the mounting plate is provided with two first slots, the inner wall of the first slot is fixedly connected to the first fixing member, the conical spring is fixedly connected below the first fixing member, the rubber ring is arranged outside the conical spring, the rubber ring is bonded below the mounting plate, and a first driving member is arranged above the test component; The auxiliary detection components include a water barrier box, a water trough, a limiting side rod, a second slot hole, a sealing groove, a mounting side plate and a bottom sealing ring. The water trough is provided in the middle of the water barrier box, the mounting side plate is bonded on the top of the water barrier box, four limiting side rods are fixed on the top of the water barrier box, two second slot holes are provided on the outer wall of the mounting side plate, a valve block is placed in the middle of the second slot hole, and a liquid pipeline is installed on the left side of the water barrier box; A conveying box is installed below the main body of the airtight detection cabinet, a water pump is arranged inside the conveying box, and a partition is installed at the front side of the auxiliary detection component.

2. A plunger pump valve body sealing test device according to claim 1, characterized in that: The partition, the mounting plate, the mounting side plate and the water-proof box are all made of organic glass.

3. A plunger pump valve body sealing test device according to claim 2, characterized in that: The first driving component comprises an installation box, a limiting top rod, a driving wheel, a driving member, a limiting block, a driving rod, a driving motor, an auxiliary wheel, a support block and a driving belt. Two limiting top rods are installed below the installation box, the driving wheel is installed in the middle of the installation box, the outer wall of the driving wheel is fixedly connected to the driving rod, the driving member is installed on the outer side of the limiting block, the limiting block is sleeved on the outer wall below the driving member, the bottom end of the driving member is fixedly connected to the limiting top rod, the driving motor is installed in the middle of the two driving wheels, the driving belt is installed at the output end of the driving motor, and a support block is provided at the connection between the driving wheel and the installation box.

4. A plunger pump valve body sealing test device according to claim 3, characterized in that: The second driving component includes a side frame, a connecting plate, a screw rod, a limiting rod and a moving block. The connecting plate is provided on one side of the side frame close to the mounting plate, and the connecting plate is fixedly connected to the mounting plate. The screw rod is installed in the middle of the side frame, and the limiting rod is provided on one side of the screw rod. The moving block is threadedly connected to the outer wall of the screw rod, and the outer wall of the moving block is fixedly connected to the connecting plate.

5. A plunger pump valve body sealing test device according to claim 4, characterized in that: The limiting push rod and the valve body block are located on the same central axis, and downward movement of the limiting push rod will cause the rubber on the bottom side of the valve body block to fit tightly with the bottom sealing ring.

6. A plunger pump valve body sealing test device according to claim 1, characterized in that: Light strips are installed inside the mounting side plate and the mounting plate, and the light strips are externally connected to a battery via a connecting line.

7. A plunger pump valve body sealing test device according to claim 1, characterized in that: A trough for liquid to flow downward is provided on the bottom plate above the main body of the airtight detection cabinet, and a water storage tank is provided below the delivery box.

8. A multi-point observation method for a plunger pump valve body sealing test, implemented by a plunger pump valve body sealing test device according to claims 1-7, characterized in that: The method comprises the following steps: S1: After placing the valve block in the second slot, the bottom sealing ring will support it, and the staff will control the pump body of the conveying box to test the valve block. S2: There are two modes for detecting vane blocks: (i) The limiting push rod does not touch the top of the valve block, and the liquid will push the valve block out. Onlookers and experimenters can observe the liquid passing through the surface of the valve block through the organic glass material; (ii) The limiting push rod contacts the top of the valve block, the valve block is in a sealed state, and the liquid does not leak out. The observer can observe whether there is liquid leakage from the second slot hole and the first slot hole, thereby judging the sealing performance of the valve block. S3: During the inspection, both sides of the airtight inspection cabinet can be observed in multiple directions through the organic glass material. If a relatively dim environment is encountered, auxiliary observation can be carried out by turning on the light.

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