Adjustable sealing performance detection device for protective equipment

Abstract

The utility model discloses an adjustable protective equipment sealing performance detection device, which relates to the technical field of protective equipment sealing performance detection, and comprises a workbench, and the bottom end of the workbench is fixedly connected with a supporting side plate and an air bellow. The top end of the workbench is connected with a mounting box, a pushing mechanism, a mounting frame, a sealing box and a pressure sensor through supporting frames at the four corners, a sealing assembly is arranged between the workbench and the supporting side plates, and auxiliary assemblies are arranged on the two sides of the sealing box. According to the adjustable protective equipment sealing performance detection device, the sealing assembly is arranged, two driving sealing plates and a driven sealing plate cover the convex edge of the bottom of the sealing box, the attaching tightness of the sealing box and the civil air defense door can be further enhanced, and therefore the accuracy of the detection result is guaranteed; by arranging the auxiliary assembly, the pressure change in the civil air defense door and the sealing box can be verified in an auxiliary manner, so that the situation that the pressure change cannot be detected due to the fact that a pressure sensor breaks down or is not sensitive enough is avoided.

Description

Technical Field

[0001] This utility model relates to the field of protective equipment airtightness performance testing technology, specifically an adjustable protective equipment airtightness performance testing device. Background Technology

[0002] To ensure the safety of people's daily work and life, various construction sites are equipped with corresponding civil defense engineering equipment. Among them, civil defense doors are a commonly used protective equipment. They play an important role in fire prevention, theft prevention, sound insulation, and impact and blast resistance. After the civil defense doors are produced, special testing devices are needed to test their airtightness.

[0003] The existing air defense door testing device uses an electric push rod or hydraulic rod to push the bellows and the sealing box to approach and contact the air defense door at the same time, so that a sealed space is formed between the sealing box and the air defense door. By blowing air into the air defense door through the fan in the bellows on the other side, if the pressure in the sealing box changes, it indicates that the airtightness of the air defense door is insufficient.

[0004] However, in actual use, the electric push rod or hydraulic rod may cause a certain degree of shaking during the movement of the sealed box. This may prevent the sealed box from forming a sealed space after it comes into contact with the airtight door of the civil defense project, which is not conducive to subsequent testing.

[0005] To overcome the above-mentioned defects, the existing technology (Chinese patent with announcement number CN220230856U and application date of 2023-04-26) provides a sealing door testing device for civil defense projects. This device uses a motor to drive an adjusting screw to rotate, which in turn drives a sliding frame to move. The sliding frame, through a connecting rod, moves a sliding frame and a sealing box downwards. The sealing ring and the sealing box create a sealed space between the civil defense door placed on the workbench surface and the interior of the sealing box. Then, a fan and a pressure sensor work together to test the sealing performance of the civil defense door, and a light illuminates the test results. This device offers better sealing performance than previous methods and can more accurately test the sealing performance of civil defense doors.

[0006] Although the above-mentioned technology can complete the sealing test of the airtightness of the air defense door, in actual operation, relying solely on the downward-moving sealing box and sealing ring to ensure the formation of the sealed space is relatively unstable. Furthermore, the pressure sensor may fail to detect pressure changes due to malfunction or insufficient sensitivity, and the accuracy of the sealing test results cannot be verified.

[0007] To address the aforementioned issues, there is an urgent need for innovative design based on existing equipment. Therefore, we have proposed an adjustable protective equipment sealing performance testing device that can effectively solve the above problems. Utility Model Content

[0008] The purpose of this utility model is to provide an adjustable protective equipment sealing performance testing device to solve the problems mentioned in the background art, which are that in actual operation, relying solely on the downward-moving sealing box and sealing ring to ensure the formation of a sealed space is relatively unstable, and the pressure sensor may fail to detect pressure changes due to malfunction or insufficient sensitivity, thus making it impossible to verify the accuracy of the sealing performance test results.

[0009] To achieve the above objectives, this utility model provides the following technical solution: an adjustable protective equipment airtightness testing device, including a workbench, with supporting side plates fixedly connected to both sides of the bottom end of the workbench, an air box fixedly installed at the bottom end of the hollow part of the workbench, and supporting frames fixedly connected to the four corners of the top end of the workbench, with a mounting box fixedly connected to the top of the four supporting frames.

[0010] The installation box is equipped with a pushing mechanism inside and on the outer bottom. The bottom connecting rod of the pushing mechanism is rotatably connected to the installation frame. The installation frame is vertically limited and slides between four support frames. A sealing box is fixedly connected inside the installation frame. A pressure sensor is fixedly installed on the top of the sealing box. When using this device to test the sealing performance of the air defense door, the air defense door is placed above the hollow part of the workbench. Then, the pushing mechanism is started to move the installation frame and the sealing box downwards, so that the sealing box is completely in contact with the surface of the air defense door, and a sealed space is formed between the sealing box and the air defense door. At this time, the bellows and the pressure sensor are started. If the pressure sensor does not detect a change in pressure value, it proves that the air defense door is well sealed. If the pressure sensor detects a change in pressure value, it proves that the air blown out by the bellows enters the sealed space through the gap of the air defense door, that is, the air defense door has poor sealing performance.

[0011] The bottom outer wall of the sealing box has a raised edge. A sealing assembly is provided between the workbench and the supporting side plate. The sealing assembly includes a motor fixedly installed on the side wall of the supporting side plate. One output shaft of the motor passes through the two supporting side plates and is fixedly connected to a bidirectional lead screw. The outer side of the bidirectional lead screw is threaded with symmetrically distributed active slide bars. The top of the active slide bars is fixedly connected to an active sealing plate through a connector. Fixed rods are fixedly connected to the outer walls of both ends of the air box. Driven slide bars are slidably sleeved on the outer side of the fixed rods. The top of the driven slide bars is fixedly connected to a driven sealing plate through a connector. A sliding groove is provided on the workbench at the corresponding position of the connector. The active sealing plate and the driven sealing plate slide along the surface of the workbench through the sliding groove. The active sealing plate has two pairs of inclined protrusions that slide together and fit together at both ends of its side wall and the driven sealing plate. When the sealing box descends to its bottom end and fits against the surface of the air-raid shelter door, the motor is started to drive the bidirectional screw to rotate. The bidirectional screw continues to drive the two active sliding strips on the outside to move closer to each other. The active sealing plate on the top of the active sliding strip moves closer along the sliding groove in sync. At the same time, due to the two pairs of inclined protrusions pressing together, the two active sliding strips will drive the two driven sliding strips to move closer together in sync when they move closer. The driven sealing plate on the top of the driven sliding strip moves closer as well. In this way, the two active sealing plates and the driven sealing plate will cover the bottom protrusion of the sealing box to further enhance the tightness of the fit between the bottom surface of the sealing box and the air-raid shelter door, thereby ensuring the accuracy of the air-raid shelter door sealing performance test results.

[0012] The sealed box is equipped with auxiliary components on both sides. These auxiliary components are used in conjunction with pressure sensors to help verify the pressure changes in the sealed space formed by the air defense door and the sealed box, so as to avoid the situation where the pressure sensor fails to detect the pressure changes due to malfunction or insufficient sensitivity.

[0013] Preferably, a sealing ring is fixedly bonded to the bottom surface of the sealing box. The sealing ring can improve the airtightness between the sealing box and the air-raid shelter door, and also provide a buffer protection function when the sealing box is lowered.

[0014] Preferably, the active slide bar has a T-shaped structure, with oblique protrusions formed at both ends of the side wall of its horizontal plate, and the bottom of the vertical plate is threadedly connected to the bidirectional lead screw. This structure, while being reasonably arranged with the bellows, can effectively ensure the balance and stability of both ends when the two active slide bars move with the rotation of the bidirectional lead screw.

[0015] Preferably, the active sealing plate and the driven sealing plate are L-shaped structures, and their lengths correspond to and match the width and length of the bottom convex edge of the sealing box. The top outer edge of the convex edge of the sealing box is formed into an arc edge structure. The above structure and size settings enable the active sealing plate and the driven sealing plate to move along the arc edge to tightly cover the surface of the convex edge of the sealing box.

[0016] Preferably, a first spring is fixedly connected between the driven slide bar and the end face of the air box, located outside the fixed rod. When the test is completed and the air defense door needs to be removed, the starter motor drives the bidirectional lead screw to reverse, causing the two active slide bars and active sealing plates to move away from each other. The inclined protrusions that are pressed together slide relative to each other. At this time, under the action of the rebound force of the first spring, the two driven slide bars will also move away from each other along the fixed rod, and the driven sealing plates will move synchronously. In this way, the two active sealing plates and the driven sealing plates will be released from the cover pressure on the convex edge of the sealing box, so as to facilitate the lifting of the sealing box and the removal of the air defense door.

[0017] Preferably, the auxiliary component includes a sealing sleeve fixedly connected to the outer walls of both ends of the sealing box. The end face of the sealing box has a circular hole communicating with the sealing sleeve. A piston block is slidably connected inside the sealing sleeve. A piston rod is fixedly connected to the end face of the piston block. One end of the piston rod extends to the outside of the sealing sleeve and is fixedly connected to the outer wall of the sealing sleeve with a second spring. If the air defense door is not airtight, the bellows blows air between the sealing box and the air defense door, increasing the air pressure in the sealed space. This will squeeze the piston block to move outward along the sealing sleeve, and the piston rod will move outward synchronously. The second spring will be stretched. At this time, even if the pressure sensor fails to detect the pressure change due to malfunction or insensitivity, the airtightness of the air defense door can still be displayed by the changes in the piston rod and the second spring, thereby improving the completeness of the device's detection.

[0018] Preferably, the outer wall surface of the portion of the piston rod located inside the sealing sleeve is formed with evenly distributed graduations. Users can observe and judge the outward displacement of the piston rod through the graduations, thereby gaining a more accurate understanding of the sealing performance of the air defense door.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows: This adjustable protective equipment airtightness testing device, by setting a sealing assembly, utilizes two active sealing plates and a driven sealing plate to cover the bottom convex edge of the sealing box, which can further enhance the tightness of the seal between the sealing box and the air-raid shelter door, thereby ensuring the accuracy of the test results; by setting an auxiliary assembly, it can assist in verifying the pressure changes inside the air-raid shelter door and the sealing box, so as to avoid the situation where the pressure sensor fails to detect the pressure change due to malfunction or insufficient sensitivity. The specific details are as follows:

[0020] (1) By setting a sealing component, when the sealing box descends to its bottom end and is attached to the surface of the air-raid shelter door, the motor is started to drive the double-acting screw to rotate. The double-acting screw continues to drive the two active sliding strips on the outside to move closer to each other. The two active sealing plates move closer to each other synchronously. At the same time, due to the two pairs of convex blocks pressing against each other, the two active sliding strips will drive the two driven sliding strips to move closer to each other synchronously when they are close. The two driven sealing plates will then move closer to each other. In this way, the two active sealing plates and the driven sealing plates will cover the bottom convex edge of the sealing box to further enhance the tightness of the sealing box bottom surface and the air-raid shelter door, thereby ensuring the accuracy of the air-raid shelter door sealing performance test results.

[0021] (2) By setting up auxiliary components to cooperate with pressure sensors, the pressure changes in the sealed space formed by the air defense door and the sealing box can be verified. If the air defense door is not sealed enough, the air box blows air between the sealing box and the air defense door, which increases the air pressure in the sealed space. This will squeeze the piston block to move outward along the sealing sleeve, and the piston rod moves outward synchronously. The second spring is stretched. At this time, even if the pressure sensor fails or is not sensitive enough to detect the pressure change, the sealing performance of the air defense door can be displayed by the changes in the piston rod and the second spring, thereby improving the completeness of the device's detection.

[0022] (3) By fixing and bonding the sealing ring to the bottom surface of the sealing box, the airtightness between the sealing box and the air defense door can be improved, and a buffer protection effect can be provided when the sealing box is lowered.

[0023] (4) By setting a first spring between the driven slide bar and the bellows, when the test is completed and the air defense door needs to be removed, the start motor drives the bidirectional screw to reverse, so that the two active slide bars and active sealing plates move away from each other, and the inclined protrusions that are pressed together slide relative to each other. At this time, under the action of the rebound force of the first spring, the two driven slide bars will also move away from each other along the fixed rod, and the two driven sealing plates will move synchronously. In this way, the two active sealing plates and driven sealing plates will be released from the cover pressure on the convex edge of the sealing box, so as to facilitate the lifting of the sealing box and the removal of the air defense door. Attached Figure Description

[0024] Figure 1 This is a front view of the overall structure of this utility model;

[0025] Figure 2 This is a bottom view of the overall structure of this utility model;

[0026] Figure 3 This is a partial structural schematic diagram of the sealing assembly of this utility model;

[0027] Figure 4 This is a schematic diagram of the structure of the workbench of this utility model;

[0028] Figure 5This is a schematic diagram of the connection structure of the sealing box of this utility model;

[0029] Figure 6 This is a schematic diagram of the internal cross-sectional structure of the sealing box of this utility model.

[0030] In the diagram: 1. Workbench; 2. Support side plate; 3. Air box; 4. Support frame; 5. Mounting box; 6. Pushing mechanism; 7. Mounting frame; 8. Sealing box; 9. Pressure sensor; 10. Sealing ring; 11. Motor; 12. Bidirectional lead screw; 13. Active slide bar; 14. Slide groove; 15. Active sealing plate; 16. Fixed rod; 17. Driven slide bar; 18. First spring; 19. Driven sealing plate; 20. Inclined protrusion; 21. Sealing sleeve; 22. Piston block; 23. Piston rod; 24. Second spring. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Example 1: Please refer to Figures 1-6 The present invention provides the following technical solution: an adjustable protective equipment airtightness testing device, including a workbench 1, with supporting side plates 2 fixedly connected to both sides of the bottom end of the workbench 1, an air box 3 fixedly installed at the bottom end of the hollow part of the workbench 1, and supporting frames 4 fixedly connected to the four corners of the top end of the workbench 1, and an installation box 5 fixedly connected to the top of the four supporting frames 4.

[0033] A pushing mechanism 6 is installed inside and on the outer bottom of the mounting box 5. A mounting frame 7 is rotatably connected to the bottom connecting rod of the pushing mechanism 6. The mounting frame 7 is vertically limited and slides between four support frames 4. A sealing box 8 is fixedly connected inside the mounting frame 7. A pressure sensor 9 is fixedly installed on the top of the sealing box 8. A sealing ring 10 is fixedly bonded to the bottom surface of the sealing box 8. The sealing ring 10 improves the airtightness between the sealing box 8 and the air-raid shelter door, and also provides cushioning protection when the sealing box 8 descends. This device is used to test the sealing performance of the air-raid shelter door. When the air defense door is placed above the hollow part of the workbench 1, the pushing mechanism 6 is activated to move the installation frame 7 and the sealing box 8 downwards, so that the sealing box 8 is completely attached to the surface of the air defense door, and a sealed space is formed between the sealing box 8 and the air defense door. At this time, the bellows 3 and the pressure sensor 9 are activated. If the pressure sensor 9 does not detect a change in pressure value, it proves that the air defense door is well sealed. If the pressure sensor 9 detects a change in pressure value, it proves that the air blown out by the bellows 3 enters the sealed space through the gap of the air defense door, that is, the air defense door is poorly sealed.

[0034] The bottom outer wall of the sealing box 8 is formed with a raised edge. A sealing assembly is provided between the workbench 1 and the supporting side plate 2. The sealing assembly includes a motor 11 fixedly installed on the side wall of the supporting side plate 2. One output shaft of the motor 11 passes through the two supporting side plates 2 and is fixedly connected to a bidirectional lead screw 12. The outer side of the bidirectional lead screw 12 is threaded with symmetrically distributed active slide bars 13. The top of the active slide bars 13 is fixedly connected to an active sealing plate 15 through a connector. The outer walls of both ends of the air box 3 are fixedly connected with fixed rods 16. The outer side of the fixed rods 16 is slidably sleeved with a driven slide bar 17. The top of the driven slide bar 17 is connected to a... A driven sealing plate 19 is fixedly connected via a connector. The active sealing plate 15 and the driven sealing plate 19 are L-shaped, and their lengths correspond to the width and length of the bottom convex edge of the sealing box 8. The top outer edge of the convex edge of the sealing box 8 is formed into an arc edge structure. This structure and dimensional setting allow the active sealing plate 15 and the driven sealing plate 19 to move along the arc edge to tightly cover the surface of the convex edge of the sealing box 8. A sliding groove 14 is provided on the worktable 1 at the corresponding position of the connector. The active sealing plate 15 and the driven sealing plate 19 slide along the surface of the worktable 1 through the sliding groove 14. The two ends of the side wall of the sealing plate 15 and the two sides of the end wall of the driven sealing plate 19 are formed with two pairs of oblique protrusions 20 that slide together. The active slide bar 13 has a T-shaped structure, with oblique protrusions 20 formed at both ends of the side wall of its horizontal plate, and the bottom of the vertical plate is threadedly connected to the bidirectional screw 12. This structure, while being reasonably arranged with the bellows 3, can effectively ensure the balance and stability of the two ends when the two active slide bars 13 move with the rotation of the bidirectional screw 12. When the sealing box 8 descends to the point where its bottom end is in contact with the surface of the air defense door, the starter motor 11 drives the bidirectional screw 12 to rotate, and the bidirectional screw 12 continues to drive The two active sliding strips 13 on the outer side approach each other, and the active sealing plate 15 on the top of the active sliding strip 13 moves closer and closer along the sliding groove 14. At the same time, due to the two pairs of inclined protrusions 20 pressing against each other, the two active sliding strips 13 will drive the two driven sliding strips 17 to move closer and closer at the same time. The driven sealing plate 19 on the top of the driven sliding strip 17 moves closer and closer as well. In this way, the two active sealing plates 15 and the driven sealing plate 19 will cover the bottom protruding edge of the sealing box 8 to further strengthen the tightness of the bottom surface of the sealing box 8 and the air defense door, thereby ensuring the accuracy of the air defense door sealing performance test results.

[0035] In addition, a first spring 18 is fixedly connected between the driven slide 17 and the end face of the bellows 3 on the outside of the fixed rod 16. When the test is completed and the air defense door needs to be removed, the starter motor 11 drives the bidirectional lead screw 12 to reverse, causing the two active slides 13 and the active sealing plate 15 to move away from each other. The inclined protrusions 20 that are pressed together slide relative to each other. At this time, under the action of the rebound force of the first spring 18, the two driven slides 17 will also move away from each other along the fixed rod 16. The driven sealing plate 19 moves synchronously. In this way, the two active sealing plates 15 and the driven sealing plate 19 will be released from the cover pressure on the protrusion of the sealing box 8, so as to facilitate the lifting of the sealing box 8 and the removal of the air defense door.

[0036] Example 2:

[0037] Based on Embodiment 1, auxiliary components are provided on both sides of the sealed box 8. These auxiliary components are used in conjunction with the pressure sensor 9 to assist in verifying the pressure changes in the sealed space formed by the air-raid shelter door and the sealed box 8, in order to avoid the situation where the pressure sensor 9 fails to detect the pressure changes due to malfunction or insufficient sensitivity. Specifically, the auxiliary components include a sealing sleeve 21 fixedly connected to the outer walls of both ends of the sealed box 8. The end face of the sealed box 8 has a circular hole communicating with the sealing sleeve 21. A piston block 22 is slidably connected inside the sealing sleeve 21. A piston rod 23 is fixedly connected to the end face of the piston block 22. One end of the piston rod 23 extends through to the outside of the sealing sleeve 21, and a second spring 24 is fixedly connected between the piston rod 23 and the outer wall of the sealing sleeve 21. The piston rod 23, located inside the sealing sleeve 21, has evenly distributed graduations on its outer wall surface. Users can observe and judge the outward displacement of the piston rod 23 through the graduations, thereby gaining a more accurate understanding of the sealing performance of the air-raid shelter door. If the air-raid shelter door is not airtight, the bellows 3 blows air between the sealing box 8 and the air-raid shelter door, increasing the air pressure in the sealed space. This will compress the piston block 22 to move outward along the sealing sleeve 21, and the piston rod 23 will move outward simultaneously. The second spring 24 will be stretched. At this time, even if the pressure sensor 9 fails to detect the pressure change due to malfunction or insensitivity, the sealing performance of the air-raid shelter door can still be displayed by observing the changes in the piston rod 23 and the second spring 24, thereby improving the completeness of the device's detection.

[0038] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0039] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An adjustable protective equipment airtight performance detection device, comprising a workbench (1), both sides of the bottom end of the workbench (1) are fixedly connected with support side plates (2), the bottom end of the hollow part of the workbench (1) is fixedly installed with a wind box (3), the top corners of the workbench (1) are respectively fixedly connected with support frames (4), and the top portions of the four support frames (4) are commonly fixedly connected with a mounting box (5); characterized in that a push mechanism (6) is installed in the inside and the bottom end outside of the mounting box (5), a mounting frame (7) is rotatably connected to the bottom link of the push mechanism (6), the mounting frame (7) vertically limits and slides between the four support frames (4), the inside of the mounting frame (7) is fixedly connected with a sealing box (8), and the top end of the sealing box (8) is fixedly installed with a pressure sensor (9); the bottom outer wall of the sealing box (8) is formed with a flange, a sealing assembly is arranged between the workbench (1) and the support side plates (2), the sealing assembly comprises a motor (11) fixedly installed on the side wall of the support side plate (2), one side output shaft of the motor (11) penetrates between the two support side plates (2) and is fixedly connected with a bidirectional screw rod (12), the outer side of the bidirectional screw rod (12) is threadedly connected with symmetrically distributed driving sliding bars (13), the top end of the driving sliding bar (13) is fixedly connected with a driving sealing plate (15) through a connecting piece, the outer walls of both ends of the wind box (3) are fixedly connected with fixed rods (16), the outer side of the fixed rod (16) is slidably sleeved with a driven sliding bar (17), the top end of the driven sliding bar (17) is fixedly connected with a driven sealing plate (19) through a connecting piece, and the corresponding positions of the connecting pieces on the workbench (1) are provided with sliding grooves (14); the driving sealing plate (15) and the driven sealing plate (19) slide along the surface of the workbench (1) through the sliding grooves (14), and the side walls of both ends of the driving sealing plate (15) and the end walls of both sides of the driven sealing plate (19) are formed with inclined convex blocks (20) that slide in pairs; auxiliary assemblies are arranged on both sides of the sealing box (8).

2. The adjustable detection device for checking the sealing performance of protective equipment according to claim 1, characterized in that: A sealing ring (10) is fixedly bonded to the bottom surface of the sealing box (8).

3. The adjustable detection device for checking the sealing performance of protective equipment according to claim 1, characterized in that: The driving sliding bar (13) is in a T-shaped structure, the side walls of both ends of the horizontal plate of the driving sliding bar (13) are formed with inclined convex blocks (20), and the bottom of the vertical plate is threadedly connected with the bidirectional screw rod (12).

4. The adjustable detection device for checking the sealing performance of protective equipment according to claim 1, characterized in that: The driving sealing plate (15) and the driven sealing plate (19) are in an L-shaped structure, and the lengths of the two correspondingly match the width and length of the flange at the bottom of the sealing box (8), and the top outer edge of the flange of the sealing box (8) is formed in a circular arc edge structure.

5. The adjustable detection device for checking the sealing performance of protective equipment according to claim 1, characterized in that: A first spring (18) is fixedly connected to the outside of the fixed rod (16) between the end surface of the driven sliding bar (17) and the wind box (3).

6. The adjustable detection device for checking the sealing performance of protective equipment according to claim 1, characterized in that: The auxiliary assembly comprises a sealing sleeve (21) fixedly connected to the outer wall of the sealing box (8) at both ends, the end face of the sealing box (8) is provided with a circular hole in communication with the sealing sleeve (21), and the inside of the sealing sleeve (21) is slidably connected with a piston block (22); the end face of the piston block (22) is fixedly connected with a piston rod (23), one end of the piston rod (23) penetrates to the outside of the sealing sleeve (21), and the outer wall of the sealing sleeve (21) is fixedly connected with a second spring (24).

7. The adjustable detection device for checking the sealing performance of protective equipment according to claim 6, characterized in that: The outer wall surface of the internal part of the piston rod (23) in the sealing sleeve (21) is formed with uniformly distributed scales.

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