Airtightness detection equipment for the door frame, door frame and door leaf of a civil air defense door

Abstract

This application discloses an airtightness testing device for the door frame and door leaf of a civil defense door, belonging to the technical field of door leaf airtightness testing equipment. It includes a simulated wall, with the civil defense door fixedly installed on one side of the simulated wall. An air inlet and an air outlet are provided on the side of the simulated wall away from the civil defense door. An airtightness tester is placed beside the simulated wall. The air inlet is connected to the air supply pipe of the airtightness tester, and the air outlet is connected to the air intake of the airtightness tester. A lead screw is rotatably connected to the simulated wall, and a connecting rod is fixedly sleeved on the lead screw, with the connecting rod threadedly connected to the lead screw. A sealing plate is fixedly sleeved on the connecting rod. A drive assembly for driving the lead screw to rotate is provided on the simulated wall, and a moving part for moving the sealing plate is also provided on the simulated wall. A rubber pad is fixedly connected to the sealing plate, and the rubber pad abuts against the inner wall of the door frame. This application has the effect of reducing the area used during testing, reducing water waste, and thus reducing economic costs.

Description

Technical Field

[0001] This application relates to the technical field of door leaf airtightness testing equipment, and in particular to a device for testing the airtightness between the door frame and the door leaf of a civil defense door. Background Technology

[0002] Civil defense, also known as civil protection, includes civil defense doors, which are protective equipment used in civil defense operations such as air raid defense, disaster relief, rescue operations, and prevention and mitigation of disaster hazards. They are primarily used at various openings in civil defense projects to block shock waves, chemical agents, electromagnetic pulses, shrapnel, and early nuclear radiation, and must meet both protective and airtight requirements. Therefore, airtightness testing is a crucial indicator for evaluating the performance of civil defense doors.

[0003] In the prior art, the airtightness detection device for air-raid shelter doors includes a water tank with an open top and a detection box slidably connected inside the water tank to support the air-raid shelter door. The air-raid shelter door and the detection box form a sealed space. The detection box is lowered into the water tank by a drive component, and air is injected into the detection box. The location of the air leak is determined by observing the position of the air bubbles.

[0004] Regarding the aforementioned technologies, the inventors believe that placing large air-raid shelter doors inside water tanks for testing not only requires a large water tank area but also wastes a significant amount of water resources, thereby increasing economic costs. Summary of the Invention

[0005] In order to reduce the area used for testing, reduce water waste, and thus reduce economic costs, this application provides a device for testing the airtightness between the door frame and the door leaf of a civil defense door.

[0006] The technical solution provided in this application for an airtightness testing device between the door frame and the door leaf of a civil defense door adopts the following:

[0007] An airtightness testing device for a door frame, door frame and door leaf of a civil defense door includes a simulated wall. The civil defense door is fixedly installed on one side of the simulated wall. An air inlet and an air outlet are provided on the side of the simulated wall away from the civil defense door. An airtightness tester is placed next to the simulated wall. The air inlet is connected to the air supply pipe of the airtightness tester, and the air outlet is connected to the air intake of the airtightness tester.

[0008] A lead screw is rotatably connected to the simulation wall, and a connecting rod is fixedly sleeved on the lead screw. The connecting rod is threadedly connected to the lead screw. A sealing plate is fixedly sleeved on the connecting rod. A drive assembly for driving the lead screw to rotate is provided on the simulation wall. A moving part for moving the sealing plate is provided on the simulation wall. A rubber pad is fixedly connected to the sealing plate, and the rubber pad abuts against the inner wall of the door frame.

[0009] By adopting the above technical solution, the staff first fixes the door frame of the air-raid shelter door to the simulated wall, then rotates the door leaf onto the simulated wall and opens the door leaf. Next, the staff drives the lead screw to rotate via the drive assembly. The rotation of the lead screw drives the connecting rod to rotate, which in turn drives the sealing plate to rotate. When the sealing plate rotates to align with the door frame, the connecting rod, under the action of the moving component, moves the sealing plate into the air-raid shelter door frame until the rubber pad on the sealing plate presses against the inner wall of the door frame. At this point, a sealed space is formed between the sealing plate, the door frame, and the simulated wall. The staff then turns on the airtightness tester and injects gas into the sealed space formed by the door frame through the air inlet. After a short while, the gas in the sealed space is discharged through the air outlet. After a period of time, the staff observes the difference between the air inlet and outlet on the airtightness tester. If there is no difference between the air inlet and outlet, the air-raid shelter door is considered airtight. The airtightness of the door frame is excellent; conversely, a difference indicates poor airtightness. After the airtightness of the door frame is tested and found to be intact, the staff, under the action of the drive components and moving parts, moves the sealing plate away from the door frame and closes the door. The airtightness between the door frame and the door leaf is then tested again using an airtightness testing instrument. This completes the airtightness test of the door frame and the airtightness between the door frame and the door leaf, thereby reducing the area used for testing, reducing water waste, and thus lowering the economic cost of testing.

[0010] Preferably, the sealing plate has a trapezoidal cross-section, and the rubber pad has a trapezoidal cross-section.

[0011] By adopting the above technical solution, the sealing plate and the rubber gasket on the sealing plate are both trapezoidal in cross-section, which is conducive to the sealing plate and the rubber gasket being tightly attached to the inner wall of the door frame of the air-raid shelter, thereby increasing the airtightness between the sealing plate and the door frame of the air-raid shelter.

[0012] Preferably, the drive assembly includes a motor, a first gear, and a second gear. The motor is fixedly mounted on the side wall of the simulated wall, the first gear is fixedly sleeved on the motor shaft, and the second gear is fixedly sleeved on the lead screw. The first gear and the second gear mesh with each other.

[0013] By adopting the above technical solution, after the air-raid shelter door is fixedly installed and opened, the staff starts the motor. The motor shaft rotates, which drives the first gear to rotate. The rotation of the first gear drives the second gear to rotate, which in turn drives the lead screw to rotate.

[0014] Preferably, the simulated wall has a storage slot, the movable component is a guide plate, and the guide plate is rotatably connected to the storage slot; a fixed rod is fixedly connected to the storage slot, and the guide plate is rotatably connected to the fixed rod; a torsion spring is sleeved on the fixed rod, and the two torsion arms at both ends of the torsion spring are respectively fixedly connected to the guide plate and the inner wall of the storage slot;

[0015] The guide plate has a guide groove, the inner wall of the guide groove has a through hole, the connecting rod is slidably connected to the inner wall of the guide groove, and the storage slot is provided with a limiting component for limiting the guide plate.

[0016] By adopting the above technical solution, before the staff starts the motor, when the staff releases the position restriction of the guide plate by the limiting component, the guide plate rotates under the elastic force of the torsion spring, so that the guide plate extends outside the simulated wall; when the sealing plate rotates to the guide plate under the drive of the motor, the connecting rod passes through the through hole on the guide plate and abuts against the inner wall of the guide groove. At this time, under the guidance of the guide groove, the connecting rod carries the sealing plate to move along the extension direction of the guide groove until the sealing plate is inserted into the door frame of the air-raid shelter door, and the rubber pad on the sealing plate abuts against the inner wall of the door frame of the air-raid shelter door.

[0017] Preferably, the limiting component includes a limiting rod, a push rod, and a first spring. The inner wall of the storage slot has a sliding groove, the limiting rod slides in the sliding groove, and the limiting rod abuts against the guide plate. The first spring is placed in the sliding groove, and its two ends are respectively fixedly connected to the limiting rod and the inner wall of the sliding groove. The push rod is fixedly connected to the side wall of the limiting rod, and the inner wall of the sliding groove has a sliding groove, the push rod slides in the sliding groove.

[0018] By adopting the above technical solution, initially, the limiting rod abuts against the side wall of the guide plate under the action of the first spring; before the staff prepares to start the motor, the staff pulls the push rod to move away from the guide plate. The movement of the push rod causes the limiting rod to compress the first spring and move. When the limiting rod moves away from the guide plate, the guide plate rotates under the action of the torsion spring.

[0019] Preferably, the limiting rod is provided with an inclined surface, and the guide plate abuts against the inclined surface.

[0020] By adopting the above technical solution, after the staff completes the airtightness test of the air-raid shelter door, in order to reduce the possibility of the guide plate being accidentally scratched, the staff pushes the guide plate to rotate into the storage slot. During the rotation of the guide plate into the storage slot, the guide plate abuts against the inclined surface of the limiting rod, and the inclined surface pushes the limiting rod to compress the first spring. When the guide plate passes the limiting rod and is in the storage slot, the limiting rod moves towards the guide plate and abuts against the guide plate under the elastic force of the first spring, thereby reducing the possibility of the guide plate rotating.

[0021] Preferably, a support plate is fixedly connected to the simulated wall, and the sealing plate abuts against the support plate.

[0022] By adopting the above technical solution, when the staff is not inspecting, the sealing plate is rotated by the motor to the top of the support plate and abuts against the support plate, thereby reducing the load on the lead screw and reducing the possibility of the lead screw breaking due to excessive load over a long period of time, which could cause an accident.

[0023] Preferably, a support rod is provided on the side of the simulated wall away from the air-raid shelter door, and support grooves are provided on both the simulated wall and the ground. Support blocks are provided in the support grooves, and the two ends of the support rod are respectively hinged to the two support blocks; a fixing component for fixing itself is provided in the support block.

[0024] By adopting the above technical solution, the air defense door is large in size and heavy in weight. Therefore, when the air defense door is installed on the simulated wall, the sealing plate will tilt towards the side where the air defense door is installed. The deformation of the sealing plate may affect the airtightness test of the air defense door, causing the test results to be distorted. Therefore, installing support rods effectively reduces the possibility of bending and deforming the sealing plate due to the excessive weight of the air defense door.

[0025] Preferably, a placement groove is formed in the support block, and the fixing component is located in the placement groove. The fixing component includes two abutting blocks, two connecting plates, and a second spring. The two abutting blocks move in opposite directions or towards each other. The abutting blocks pass through and are slidably connected to the inner wall of the placement groove. The two ends of the second spring are respectively fixedly connected to the inner walls of the two abutting blocks. The abutting blocks abut against the inner wall of the support groove. The two connecting plates are connected to the two abutting blocks one-to-one. A through groove is formed in the inner wall of the placement groove. The connecting plates slide in the through groove. A through hole is formed at the relative position of the two connecting plates. A bidirectional lead screw is threaded into the through hole.

[0026] By adopting the above technical solution, when workers need to remove the support rod, they use tools to turn the double-sided screw. The rotation of the double-sided screw causes the two connecting plates to move towards each other. The movement of the two connecting plates causes the two clamping blocks to compress the second spring and move into the placement groove. When the clamping blocks disengage from the inner wall of the support groove, the workers can either remove the support blocks or retract the support rod, thus reducing the possibility of tripping over it. When workers install the support blocks, they insert them into the support groove and drive the double-sided screw to rotate in the opposite direction. The rotation of the double-sided screw causes the two connecting plates to move away from each other, thus causing the two clamping blocks to move away from each other out of the placement groove. At the same time, the spring force of the second spring will abut against the clamping blocks, which will press against the inner wall of the support groove, thereby fixing the support rod.

[0027] Preferably, a rubber sheet is fixedly connected to the clamping block, and the rubber sheet abuts against the inner wall of the support groove.

[0028] By adopting the above technical solution, the rubber sheet on the clamping block can increase the friction between the clamping block and the inner wall of the support groove, thereby reducing the possibility of the clamping block slipping.

[0029] In summary, this application includes at least one of the following beneficial technical effects:

[0030] 1. First, the staff fixes the door frame of the air-raid shelter door onto the simulated wall, rotates the door leaf onto the simulated wall, and opens the door leaf. Then, the staff drives the lead screw to rotate via the drive assembly. The rotation of the lead screw drives the connecting rod to rotate, which in turn drives the sealing plate to rotate. When the sealing plate rotates to align with the door frame, the connecting rod, under the action of the moving component, moves the sealing plate into the air-raid shelter door frame until the rubber pad on the sealing plate is pressed against the inner wall of the door frame. At this point, a sealed space is formed between the sealing plate, the door frame, and the simulated wall. The staff then turns on the airtightness tester and injects gas into the sealed space through the air inlet. After a short while, the gas in the sealed space is discharged through the air outlet. After a period of time, the staff observes the difference between the air inlet and outlet on the airtightness tester. If there is no difference between the air inlet and outlet, the air-raid shelter door is considered airtight. The airtightness of the door frame is excellent; conversely, a difference indicates poor airtightness. After the airtightness of the door frame is tested and found to be intact, the staff, under the action of the drive components and moving parts, moves the sealing plate away from the door frame and closes the door. The airtightness between the door frame and the door leaf is then tested again using an airtightness testing instrument. This completes the airtightness test of the door frame and the airtightness between the door frame and the door leaf, thereby reducing the area used for testing, reducing water waste, and thus lowering the economic cost of testing.

[0031] 2. Both the sealing plate and the rubber gasket on the sealing plate have trapezoidal cross sections, which helps the sealing plate and the rubber gasket to fit tightly against the inner wall of the air-raid shelter door frame, thereby increasing the airtightness between the sealing plate and the air-raid shelter door frame;

[0032] 3. Before the staff starts the motor, when the staff releases the position restriction of the guide plate by the limit component, the guide plate rotates under the elastic force of the torsion spring, so that the guide plate extends outside the simulated wall; when the sealing plate rotates to the guide plate under the drive of the motor, the connecting rod passes through the through hole on the guide plate and abuts against the inner wall of the guide groove. At this time, under the guidance of the guide groove, the connecting rod carries the sealing plate to move along the extension direction of the guide groove until the sealing plate is inserted into the door frame of the air-raid shelter door, and the rubber pad on the sealing plate abuts against the inner wall of the door frame of the air-raid shelter door. Attached Figure Description

[0033] Figure 1 This is a side structural diagram of an airtightness testing device used for the door frame and door leaf of a civil defense door.

[0034] Figure 2This is a front structural diagram of an airtightness testing device used for the door frame, door leaf, and airtightness testing of civil defense doors.

[0035] Figure 3 This is a structural diagram showing the sealing plate inserted into the frame of the air-raid shelter door.

[0036] Figure 4 yes Figure 3 Enlarged view of point A in the middle.

[0037] Figure 5 This is a schematic diagram of the protruding clamping block in the implementation of this application.

[0038] Figure label:

[0039] 1. Simulated wall; 2. Air inlet; 3. Air outlet; 4. Air tightness tester; 5. Lead screw; 6. Connecting rod; 7. Sealing plate; 8. Rubber pad; 9. Drive assembly; 10. Moving part; 11. Motor; 12. First gear; 13. Second gear; 14. Storage slot; 15. Guide plate; 16. Guide groove; 17. Fixing rod; 18. Torsion spring; 19. Through hole; 20. Limiting assembly; 21. Limiting rod ; 22. Push rod; 23. First spring; 24. Slide groove; 25. Sliding groove; 26. Inclined surface; 27. Support plate; 28. Support rod; 29. ​​Support block; 30. Support groove; 31. Fixing component; 32. Placement groove; 33. Anchor block; 34. Connecting plate; 35. Second spring; 36. Through groove; 37. Two-way lead screw; 38. Rubber sheet; 39. Ground; 40. Air defense door frame; 41. Door leaf. Detailed Implementation

[0040] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0041] This application discloses an airtightness testing device for the door frame 40 and the door leaf 41 of a civil defense door, such as... Figure 1 As shown, the device includes a simulated wall 1, which is rectangular in shape. A blast door is installed on one side of the simulated wall 1. The blast door includes a door leaf 41 of a door frame 40. The door frame 40 is fixedly installed on the side wall of the simulated wall 1, and the door leaf 41 is rotatably connected to the simulated wall 1. Two sets of support rods 28 are installed on the side of the simulated wall 1 away from the door frame 40 to support the simulated wall 1 and reduce the possibility of bending and deforming the simulated wall 1 due to the excessive weight of the blast door. The support rods 28 are rectangular in shape and inclined. The top of the support rods 28 abuts against the side wall of the simulated wall 1, and the bottom of the support rods 28 abuts against the ground.

[0042] like Figure 1 and Figure 2The simulated wall 1 shown is provided with an air inlet 2 and an air outlet 3. An air tightness tester 4 is placed next to the simulated wall 1. The air tightness tester 4 is placed between the support rod 28 and the simulated wall 1. The air supply pipe of the air tightness tester 4 is connected to the air inlet 2, and the air intake of the air tightness tester 4 is connected to the air outlet 3.

[0043] like Figure 1 As shown, a lead screw 5 is rotatably connected to the top side wall of the simulated wall 1. The lead screw 5 is cylindrical and its axis is perpendicular to the simulated wall 1. A connecting rod 6 is fixedly sleeved on the lead screw 5. The connecting rod 6 is cuboid in shape and is threadedly connected to the lead screw 5. A sealing plate 7 is fixedly sleeved on the connecting rod 6. The sealing plate 7 has a trapezoidal cross-section. A rubber pad 8 is fixedly sleeved on the side wall of the sealing plate 7. The rubber pad 8 has a trapezoidal cross-section.

[0044] like Figure 1 and Figure 3 As shown, the sealing plate 7 can be inserted into the door frame 40 of the air-raid shelter, and the rubber pad 8 abuts against the inner wall of the door frame, thereby effectively increasing the airtightness between the sealing plate 7 and the door frame 40 of the air-raid shelter; the simulated wall 1 is provided with a drive assembly 9 for driving the lead screw 5 to rotate, and the simulated wall 1 is provided with a moving part 10 for moving the sealing plate 7.

[0045] like Figure 1 As shown, a support plate 27 is fixedly welded onto the simulated wall 1. The support plate 27 is rectangular. When the staff is not inspecting the air defense door, the sealing plate 7 is rotated above the support plate 27 by the motor 11. The sealing plate 7 is placed horizontally and abuts against the upper end face of the support plate 27, so that the support plate 27 can bear the weight of the sealing plate 7, thereby reducing the load on the lead rod 5 and reducing the possibility of the lead rod 5 breaking due to excessive load for a long time, causing an accident.

[0046] like Figure 1 As shown, before the airtightness test of the air-raid shelter door is carried out, the sealing plate 7 is placed horizontally and abuts against the lower end face of the support plate 27. The staff first installs the air-raid shelter door frame 40 and door leaf 41 on the simulated wall 1, and the door leaf 41 is in the fully open state. Then, the staff drives the lead screw 5 to rotate through the drive assembly 9. The rotation of the lead screw 5 drives the connecting rod 6 to rotate. The rotation of the connecting rod 6 drives the sealing plate 7 to rotate away from the support plate 27.

[0047] like Figure 2 and Figure 3As shown, when the sealing plate 7 rotates to a vertical position and aligns with the door frame 40 of the air-raid shelter, the connecting rod 6, under the action of the moving part 10, moves the sealing plate 7 towards the door frame 40 until the rubber pad 8 on the sealing plate 7 presses against the inner wall of the door frame 40. At this time, a sealed space is formed between the sealing plate 7, the door frame 40 of the air-raid shelter, and the simulated wall 1. The staff turns on the air tightness tester 4 and injects gas into the sealed space formed by the door frame 40 of the air-raid shelter through the air inlet 2. After a while, the gas in the sealed space is discharged through the air outlet 3. After waiting for a period of time, the staff observes the air tightness tester 4. The difference between the air inlet 2 and the air outlet 3; if there is no difference between the air inlet 2 and the air outlet 3, the air tightness of the air-raid shelter door frame 40 is excellent, otherwise; after the air tightness of the air-raid shelter door frame 40 is good, the staff, under the action of the drive component 9 and the moving part 10, move the sealing plate 7 away from the air-raid shelter door frame 40, and close the air-raid shelter door leaf 41, and then test the air tightness between the air-raid shelter door frame 40 and the air-raid shelter door again through the air tightness tester 4; thus completing the air tightness test of the air-raid shelter door frame 40 and the air-raid shelter door, thereby reducing the area used during the test and reducing the waste of water resources, thus reducing the economic cost of the test.

[0048] like Figure 1 As shown, the drive assembly 9 includes a motor 11, a first gear 12, and a second gear 13. The motor 11 is fixedly installed on the side wall of the simulated wall 1 by bolts. The axis of the motor 11 is parallel to the axis of the lead screw 5. The first gear 12 is fixedly sleeved on the motor 11 shaft, and the second gear 13 is fixedly sleeved on the lead screw 5. The first gear 12 and the second gear 13 mesh with each other. When the motor 11 starts, the motor 11 shaft drives the first gear 12 to rotate, the first gear 12 rotates, the second gear 13 rotates, and the lead screw 5 rotates, thereby rotating the sealing plate 7 to align with the door frame 40 of the air-raid shelter.

[0049] like Figure 3 and Figure 4 As shown, the simulated wall 1 has a storage slot 14 extending vertically. A fixing rod 17 is installed inside the storage slot 14, which is cylindrical and its axis is horizontal. The two ends of the fixing rod 17 are fixedly welded to the inner wall of the top of the storage slot 14. The moving part 10 is a guide plate 15, which is rectangular. The top of the guide plate 15 is rotated and fitted onto the fixing rod 17, and the guide plate 15 is rotatably connected to the storage slot 14. A torsion spring 18 is fitted on the fixing rod 17, and the two torsion arms of the torsion spring 18 are fixedly welded to the guide plate 15 and the inner wall of the storage slot 14, respectively.

[0050] like Figure 3 and Figure 4As shown, a guide groove 16 is provided on the guide plate 15. The guide groove 16 is square. A through hole 19 is provided on the inner wall of the guide groove 16 on the side away from the support plate 27. The connecting rod 6 passes through the through hole 19 and is slidably connected to the inner wall of the guide groove 16. A limiting component 20 for limiting the guide plate 15 is provided in the storage slot 14.

[0051] like Figure 4 As shown, the limiting assembly 20 includes a limiting rod 21, a push rod 22, and a first spring 23. A sliding groove 24 is formed on the inner wall of the storage slot 14, extending horizontally. The limiting rod 21 is cuboid in shape and is slidably connected to the inner wall of the sliding groove 24 in the horizontal direction. The first spring 23 is horizontally positioned within the sliding groove 24, with its two ends fixedly connected to the limiting rod 21 and the opposing inner walls of the sliding groove 24, respectively. A sliding groove 25 is formed on the inner wall of the sliding groove 24, communicating with the outside. The push rod 22 is cuboid in shape and is fixedly welded to the side wall of the limiting rod 21, sliding within the sliding groove 25. The end of the limiting rod 21 furthest from the first spring 23 is located within the storage slot 14 and abuts against the guide plate 15. The portion of the limiting rod 21 within the storage slot 14 has an inclined surface 26, with the leftmost to rightmost point of the inclined surface 26 close to the first spring 23.

[0052] like Figure 3 and Figure 4 After the air-raid shelter door is installed, the staff pulls the push rod 22 to move it to the right in the sliding groove 25. The movement of the push rod 22 causes the limit rod 21 to compress the first spring 23 and move to the right. When the limit rod 21 moves away from the guide plate 15, the guide plate 15 rotates outward from the storage groove 14 under the elastic force of the torsion spring 18, and finally makes the guide plate 15 perpendicular to the side wall of the simulated wall 1. Then, the staff starts the motor 11 to make the sealing plate 7 rotate. When the sealing plate 7 rotates and contacts the guide plate 15, the connecting rod 6 will pass through the through hole 19 on the guide plate 15. Then, the side wall of the connecting rod 6 abuts against the inner wall of the guide groove 16 opposite to the through hole 19. At this time, under the obstruction of the inner wall of the guide groove 16, the connecting rod 6 moves along the extension direction of the vertical guide groove 16. The movement of the connecting rod 6 carries the sealing plate 7 towards the air-raid shelter door frame 40 until the sealing plate 7 is inserted into the air-raid shelter door frame 40, and the rubber pad 8 on the sealing plate 7 is pressed against the inner wall of the air-raid shelter door frame 40.

[0053] like Figure 3 and Figure 4 After the staff completes the airtightness test of the air-raid shelter door, the motor 11 reverses. First, under the action of the guide groove 16, the connecting rod 6 drives the sealing plate 7 to move away from the door frame 40 of the air-raid shelter door. When the connecting rod 6 moves to the through hole 19, the through hole 19 can no longer provide an inner wall to block the rotation of the connecting rod 6. Therefore, the connecting rod 6 rotates through the through hole 19. Subsequently, the connecting rod 6 drives the sealing plate 7 to rotate away from the guide plate 15. Finally, the connecting rod 6 rotates with the sealing plate 7 to above the support plate 27.

[0054] like Figure 4 As shown, when the sealing plate 7 moves away from the guide plate 15, in order to reduce the possibility of accidental scraping by the outwardly extending guide plate 15, the operator pushes the guide plate 15 to rotate into the storage slot 14. During the rotation of the guide plate 15 into the storage slot 14, the side wall of the guide plate 15 near the simulation wall 1 abuts against the inclined surface 26 of the limiting rod 21, and the inclined surface 26 pushes the limiting rod 21 to compress the first spring 23. When the guide plate 15 passes the limiting rod 21 and is in the storage slot 14, the limiting rod 21 moves towards the guide plate 15 and abuts against the guide plate 15 under the elastic force of the first spring 23, thereby reducing the possibility of the guide plate 15 rotating.

[0055] like Figure 1 and people Figure 5 As shown, both the simulated wall 1 and the ground have two support grooves 30, and support blocks 29 are installed in the support grooves 30. One support block 29 on the ground and one support block 29 on the simulated wall 1 form a group. The two groups of support grooves 30 and two support rods 28 are arranged one-to-one. The support blocks 29 are T-shaped. The bottom of the T-shaped support block 29 is detachably connected to the support groove 30. The top of the T-shaped support block 29 on the ground abuts against the ground, and the top of the T-shaped support block 29 on the simulated wall 1 abuts against the surface of the simulated wall 1. The two ends of the support rods 28 are welded to the two support blocks 29 in each group. The support blocks 29 are provided with fixing components 31 for self-fixation.

[0056] like Figure 5 As shown, a placement groove 32 is formed in the support block 29. The fixing component 31 includes two abutting blocks 33, two connecting plates 34, and a second spring 35. The second spring 35 is vertically arranged in the placement groove 32. The two abutting blocks 33 are arranged opposite each other, and the opposite sidewalls of the two abutting blocks 33 are respectively fixedly welded to the two ends of the second spring 35. The two abutting blocks 33 slide back or forth in the placement groove 32. The abutting blocks 33 pass through the inner wall of the placement groove 32. A rubber sheet 38 is fixedly adhered to the abutting block 33. The rubber sheet 38 abuts against the inner wall of the support groove 30. The rubber sheet 38 on the abutting block 33 can increase the friction between the abutting block 33 and the inner wall of the support groove 30, thereby reducing the possibility of the abutting block 33 slipping.

[0057] like Figure 5 As shown, the inner wall of the placement groove 32 is provided with a through groove 36, which is connected to the outside. Two connecting plates 34 are connected to two abutting blocks 33 in a corresponding manner. The connecting plates 34 are fixedly welded to the abutting blocks and slide in the through groove 36. Both connecting plates 34 have through holes at their relative positions, and a two-way lead screw 37 is threaded into the through holes.

[0058] like Figure 1 and Figure 5 As shown, when the airtightness test of the air-raid shelter door is completed and no further inspection is scheduled for a short period, in order to save space and reduce the possibility of the support rod 28 tripping over people, the staff will remove the support block 29 and the support rod 28 and store them away for reinstallation during the next inspection. The staff will turn the double-sided screw 37 using tools such as wrenches and screwdrivers; the rotation of the double-sided screw 37 will cause the two connecting plates 34 to move towards each other, and the movement of the two connecting plates 34 will cause the two clamping blocks 33 to compress the second spring 35 and move them into the placement groove 32. When the clamping block 33 disengages from the inner wall of the support groove 30, the staff can remove the support block 29. Similarly, when the worker installs the support rod 28, the worker first inserts the support block 29 into the support groove 30. Then, the worker drives the double-acting screw 37 to rotate in the opposite direction. The rotation of the double-acting screw 37 causes the two connecting pieces to move in opposite directions, thereby causing the two clamping blocks 33 to move out of the placement groove 32 in opposite directions. At the same time, the second spring 35 will abut against the clamping block 33, and the clamping block 33 will press against the inner wall of the support groove 30, thereby fixing the support rod 28.

[0059] The implementation principle of this application embodiment is as follows: Before conducting an airtightness test on the air-raid shelter door, the sealing plate 7 is placed horizontally and abuts against the lower end face of the support plate 27. When preparing to conduct an airtightness test on the air-raid shelter door, the staff first installs the support rod 28, and then installs the door frame 40 and door leaf 41 on the simulated wall 1, with the door leaf 41 in a fully open state; subsequently, the staff drives the lead screw 5 to rotate through the drive assembly 9, the lead screw 5 rotates, which in turn drives the connecting rod 6 to rotate, and the connecting rod 6 rotates, which in turn drives the sealing plate 7 to rotate away from the support plate 27.

[0060] When the sealing plate 7 rotates to a vertical position and aligns with the door frame 40 of the air-raid shelter, the connecting rod 6, under the action of the moving part 10, moves the sealing plate 7 towards the door frame 40 until the rubber pad 8 on the sealing plate 7 presses against the inner wall of the door frame 40. At this time, a sealed space is formed between the sealing plate 7, the door frame 40 of the air-raid shelter, and the simulated wall 1. The staff turns on the air tightness tester 4 and injects gas into the sealed space formed by the door frame 40 of the air-raid shelter through the air inlet 2. After a while, the gas in the sealed space is discharged through the air outlet 3. After waiting for a period of time, the staff observes the air intake on the air tightness tester 4. The difference between the air inlet 2 and the air outlet 3; if there is no difference between the air inlet 2 and the air outlet 3, the air tightness of the air-raid shelter door frame 40 is excellent, otherwise; after the air tightness of the air-raid shelter door frame 40 is good, the staff, under the action of the drive component 9 and the moving part 10, move the sealing plate 7 away from the air-raid shelter door frame 40, and close the air-raid shelter door leaf 41, and then test the air tightness between the air-raid shelter door frame 40 and the air-raid shelter door again through the air tightness tester 4; thus completing the air tightness test of the air-raid shelter door frame 40 and the air-raid shelter door, thereby reducing the area used during the test and reducing the waste of water resources, thus reducing the economic cost of the test.

[0061] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A device for detecting the airtightness between the door frame and the door leaf of a civil defense door, characterized in that: The device includes a simulated wall (1), a civil defense door fixedly installed on one side of the simulated wall (1), an air inlet (2) and an air outlet (3) on the side of the simulated wall (1) away from the civil defense door, an air tightness tester (4) is placed next to the simulated wall (1), the air inlet (2) is connected to the air supply pipe of the air tightness tester (4), and the air outlet (3) is connected to the air intake of the air tightness tester (4); A lead screw (5) is rotatably connected to the simulated wall (1), and a connecting rod (6) is fixedly sleeved on the lead screw (5). The connecting rod (6) is threadedly connected to the lead screw (5). A sealing plate (7) is fixedly sleeved on the connecting rod (6). A drive assembly (9) for driving the lead screw (5) to rotate is provided on the simulated wall (1). A moving part (10) for moving the sealing plate (7) is provided on the simulated wall (1). A rubber pad (8) is fixedly connected to the sealing plate (7). The rubber pad (8) abuts against the inner wall of the door frame. The simulated wall (1) has a storage slot (14), the movable part (10) is a guide plate (15), the guide plate (15) is rotatably connected to the storage slot (14); a fixed rod (17) is fixedly connected to the storage slot (14), the guide plate (15) is rotatably connected to the fixed rod (17); a torsion spring (18) is sleeved on the fixed rod (17), and the two ends of the torsion spring (18) are fixedly connected to the guide plate (15) and the inner wall of the storage slot (14) respectively; The guide plate (15) is provided with a guide groove (16), and the inner wall of the guide groove (16) is provided with a through hole (19). The connecting rod (6) is slidably connected to the inner wall of the guide groove (16). The storage slot (14) is provided with a limiting component (20) for limiting the guide plate (15).

2. The airtightness testing device for the door frame and door leaf of a civil defense door according to claim 1, characterized in that: The sealing plate (7) has a trapezoidal cross section, and the rubber pad (8) has a trapezoidal cross section.

3. The airtightness testing device for the door frame, door frame and door leaf of a civil defense door according to claim 1, characterized in that: The drive assembly (9) includes a motor (11), a first gear (12) and a second gear (13). The motor (11) is fixedly installed on the side wall of the simulation wall (1). The first gear (12) is fixedly sleeved on the rotating shaft of the motor (11). The second gear (13) is fixedly sleeved on the lead screw (5). The first gear (12) and the second gear (13) mesh with each other.

4. The airtightness testing device for the door frame, door frame and door leaf of a civil defense door according to claim 1, characterized in that: The limiting component (20) includes a limiting rod (21), a push rod (22), and a first spring (23). The inner wall of the storage slot (14) is provided with a sliding groove (24). The limiting rod (21) slides in the sliding groove (24) and abuts against the guide plate (15). The first spring (23) is placed in the sliding groove (24). The two ends of the first spring (23) are respectively fixedly connected to the limiting rod (21) and the inner wall of the sliding groove (24). The push rod (22) is fixedly connected to the side wall of the limiting rod (21). The inner wall of the sliding groove (24) is provided with a sliding groove (25). The push rod (22) slides in the sliding groove (25).

5. The airtightness testing device for the door frame, door frame and door leaf of a civil defense door according to claim 4, characterized in that: The limiting rod (21) is provided with an inclined surface (26), and the guide plate (15) abuts against the inclined surface (26).

6. The airtightness testing device for the door frame, door frame and door leaf of a civil defense door according to claim 1, characterized in that: A support plate (27) is fixedly connected to the simulated wall (1), and the sealing plate (7) abuts against the support plate (27).

7. The airtightness testing device for the door frame, door frame and door leaf of a civil defense door according to claim 1, characterized in that: The simulated wall (1) is provided with a support rod (28) on the side away from the air defense door. Both the simulated wall (1) and the ground are provided with support grooves (30). Support blocks (29) slide in the support grooves (30). The two ends of the support rod (28) are respectively hinged to the two support blocks (29). The support blocks (29) are provided with fixing components (31) for fixing themselves.

8. The airtightness testing device for the door frame, door frame and door leaf of a civil defense door according to claim 7, characterized in that: The support block (29) has a placement groove (32). The fixing component (31) includes two abutting blocks (33), two connecting plates (34), and a second spring (35). The two abutting blocks (33) move in opposite directions or towards each other. The abutting blocks (33) pass through and are slidably connected to the inner wall of the placement groove (32). The two ends of the second spring (35) are respectively fixedly connected to the inner walls of the two abutting blocks (33). The abutting blocks (33) abut against the inner wall of the support groove (30). The two connecting plates (34) are connected to the two abutting blocks (33) one by one. The inner wall of the placement groove (32) has a through groove (36). The connecting plates (34) slide in the through groove (36). The two connecting plates (34) have through holes at their relative positions. The through holes are threaded with a two-way lead screw (37).

9. The airtightness testing device for the door frame and door leaf of a civil defense door according to claim 8, characterized in that: A rubber sheet (38) is fixedly connected to the clamping block (33), and the rubber sheet (38) abuts against the inner wall of the support groove (30).

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