Civil air defense door air tightness detection device

Abstract

The utility model discloses a civil air defense door air tightness detection device, and belongs to the field of civil air defense door air tightness detection. The air tightness detection device for the civil air defense door comprises a base, a cover plate is arranged at the upper end of the exterior of the base, pressing rods are welded to the four corners, facing the interior of the base, of the cover plate, four transmission rods are arranged around the exteriors of the four pressing rods, and the transmission rods are rotationally connected with the cover plate through transmission blocks. The civil air defense door air tightness detection device solves the problems that when a civil air defense door needs to be taken out after detection of an existing civil air defense door air tightness detection device, a sunken position is not reserved, and the civil air defense door is heavy, so that the civil air defense door is difficult to take out after detection, and the taking-out efficiency is low. The extension piece can be driven to rotate through rotation of the transmission rod, and the extension piece can support the civil air defense door along with rotation of the cover plate, so that the civil air defense door after internal detection can be taken out conveniently.

Description

Technical Field

[0001] This utility model relates to the field of airtightness testing of air-raid shelter doors, specifically an airtightness testing device for air-raid shelter doors. Background Technology

[0002] The airtightness testing device for air-raid shelter doors is a specialized device used to test the airtightness performance of airtight doors in air-raid shelter projects. By simulating the pressure conditions of a wartime nuclear, biological, and chemical contamination environment, it assesses the door's ability to block toxic and harmful gases. Its core principle is to apply positive or negative pressure in a confined space and use pressure sensors, flow meters, and other instruments to monitor pressure changes and leakage, thereby judging the sealing effect of key parts such as door gaps and sealing strips. The test results are directly related to the safety of air-raid shelter doors.

[0003] Chinese patent CN215985040U discloses an airtightness testing device for air-raid shelter doors, including a sealing cover plate. A pressure pump is provided at one end of the upper surface of the sealing cover plate, and a pressure gauge is connected to the top of the pressure pump. A pressure reducing valve is provided at the other end of the upper surface of the sealing cover plate, making the testing more convenient. The device facilitates the pushing out of the air-raid shelter door by setting a first cylinder in conjunction with a support frame and a fixing rod. The device facilitates the observation of the water level inside the airtightness testing frame by setting an observation window. The device facilitates the connection between the airtightness testing frame and the sealing cover plate by setting a sealing protrusion and a sealing groove.

[0004] When the airtightness testing device for the aforementioned air-tightness of the air-tightness of the air-tightness door needs to be removed after testing, it is difficult to remove the air-tightness door because there is no pre-reserved recessed position and the air-tightness door is relatively heavy, resulting in low removal efficiency. Utility Model Content

[0005] The purpose of this utility model is to provide a device for testing the airtightness of a civil defense door. When the cover plate and the base are separated, the rotation of the transmission rod can drive the extension plate to rotate. The rotation of the extension plate can lift the civil defense door as the cover plate rotates, making it easier to remove the civil defense door after internal testing. This solves the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an airtightness testing device for air-raid shelter doors, comprising a base, a cover plate provided on the upper part of the base, pressing rods welded to the four corners of the cover plate facing the interior of the base, four transmission rods arranged around the four pressing rods, and the transmission rods being rotatably connected to the cover plate through transmission blocks, and an extension piece welded to the lower end of the transmission rods.

[0007] Preferably, a water trough is provided at the lower end of the base, and a reserved groove is provided around the water trough, with the recessed position of the reserved groove overlapping the transmission rod.

[0008] Preferably, the four transmission blocks are connected by a synchronous belt drive, and a high-voltage motor is provided at the upper end of one of the transmission blocks, and the output shaft of the high-voltage motor passes through the cover plate and is fixedly connected to the upper end of the transmission block.

[0009] Preferably, the transmission block is provided with a transmission groove in the recess around it, and a pair of support blocks are provided at each of the four corners inside the transmission groove.

[0010] Preferably, pipes are provided on both sides of the base.

[0011] Preferably, a pressure pump is provided on one side of the high-voltage motor.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] When the liquid is filled into the base and tested, the cover plate, after being placed on the upper part of the base, will drive the pressing rod to squeeze and press against the upper part of the air-raid shelter door. This prevents the liquid from flowing out from the gap between the air-raid shelter door and the lower part of the base when no test is being conducted. At the same time, when the cover plate is placed on the upper part of the base during the test, the cover plate will simultaneously drive the transmission rod and the extension piece at one end to be inserted into the reserved groove. Before the pressure is tested and the cover plate is separated from the base, the transmission rod drives the extension piece to rotate, causing the extension piece to move to the lower part of the air-raid shelter door. Subsequently, when the cover plate moves vertically upward and the device is opened, the extension piece will directly pull the air-raid shelter door out of the base, making it easy to suspend and remove the air-raid shelter door. After the air-raid shelter door is suspended, the extension piece can rotate to remove the air-raid shelter door, making it easy to remove. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall external structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the internal structure of the base of this utility model;

[0016] Figure 3 For the present utility model Figure 2 Enlarged view of a portion of region A in the middle;

[0017] Figure 4 This is a schematic diagram showing the positional relationship of the extension piece of this utility model;

[0018] Figure 5 This is a schematic diagram showing the positional relationship of the reserved slots in this utility model.

[0019] In the diagram: 1. Base; 2. Hydraulic rod; 3. Pressure pump; 4. Pressure gauge; 5. High-pressure motor; 6. Pipeline; 7. Cover plate; 8. Pressing rod; 9. Transmission rod; 10. Transmission block; 11. Synchronous belt; 12. Reserved groove; 13. Extension plate; 14. Transmission groove; 15. Support block; 16. Air defense door; 17. Drainage trough. Detailed Implementation

[0020] The present invention will be further described below with reference to specific embodiments.

[0021] like Figure 1 As shown, an airtightness testing device for a civil defense door in this embodiment includes a base 1, and a cover plate 7 is provided on the upper part of the base 1. The airtightness test of the civil defense door 16 placed between the cover plate 7 and the base 1 can be performed by the fit between the cover plate 7 and the base 1.

[0022] The cover plate 7 is provided with a hydraulic rod 2 at its upper end. The hydraulic rod 2 is fixedly connected to the base 1 by bolts. After being supported by the hydraulic rod 2, the hydraulic rod 2 can push and adjust the horizontal position of the cover plate 7, so as to open and close the cover plate 7.

[0023] In order to ensure that when the cover plate 7 is closed and the liquid for testing is filled into the base 1, each of the four corners of the cover plate 7 facing the inside of the base 1 is provided with a pressing rod 8, and the pressing rod 8 is welded and fixed to the cover plate 7. Four transmission rods 9 are arranged around the outside of the four pressing rods 8, and the transmission rods 9 are rotatably connected to the cover plate 7 through a transmission block 10. The transmission rods 9 will move toward the air defense door 16 together with the pressing rods 8. After the pressing rods 8 press and contact the air defense door 16, the transmission rods 9 will be embedded in the surrounding position of the air defense door 16.

[0024] The lower end of the transmission rod 9 is provided with an extension piece 13, which is welded and fixed to the transmission rod 9. The lower end of the base 1 is provided with a drainage trough 17. During liquid detection, after passing through the air-raid shelter door 16, the liquid will fall from the drainage trough 17. Figure 2 and Figure 3 As shown, a reserved groove 12 is provided around the drainage trough 17, and the recessed position of the reserved groove 12 overlaps with the transmission rod 9. The extension piece 13 moves in the reserved groove 12 as the transmission rod 9 rotates, so that the extension piece 13 moves to the lower end of the air defense door 16. The rotation of the extension piece 13 can lift the air defense door 16, making it easier to remove the air defense door 16.

[0025] In addition, the four transmission blocks 10 are connected by a synchronous belt 11. A high-voltage motor 5 is installed at the upper end of one of the transmission blocks 10, and the output shaft of the high-voltage motor 5 passes through the cover plate 7 and is fixedly connected to the upper end of the transmission block 10. Figure 5 As shown, the output of the high-voltage motor 5, combined with the transmission of the synchronous belt 11, enables the four transmission rods 9 and the corresponding extension plates 13 to rotate synchronously.

[0026] To prevent the prominent timing belt 11 from easily falling off, such as Figure 4As shown, a transmission groove 14 is recessed around the transmission block 10. A pair of support blocks 15 are provided at each of the four corners inside the transmission groove 14. The support blocks 15 can support the synchronous belt 11 at the corners inside the transmission groove 14, so as to prevent the synchronous belt 11 at the corners from rubbing against the cover plate 7.

[0027] In order to test the internal area of ​​the cover plate 7 and the base 1, pipes 6 are respectively provided on both sides of the base 1. The two pipes 6 respectively transmit the corresponding test liquid. A pressure pump 3 is provided on one side of the high-pressure motor 5, and the lower end of the pressure pump 3 is sealed to the lower end of the cover plate 7. After the test liquid is sent into the space between the cover plate 7 and the base 1 through the pipe 6, the pressure pump 3 can be started to increase the pressure between the cover plate 7 and the base 1. A pressure gauge 4 is provided on the upper end of the pressure pump 3. During the process of starting the pressure pump 3, the pressure gauge 4 can detect the pressure and detect whether the pressure value changes.

[0028] The reference patent announcement number is CN215985040U. In that application, pressure is detected by pressure pump 3 and pressure gauge 4. The detection method used is a conventional technology, so the detection method is not described in detail in this application.

[0029] Working Principle: When using the device to test the airtightness of the air-raid shelter door 16, the door 16 is laid flat inside the lower end of the base 1 in the drain trough 17. The extension of the hydraulic rod 2 pushes the cover plate 7 to cover the upper part of the base 1. The cover plate 7 is pressed against the upper part of the air-raid shelter door 16 by the pressing rod 8. Simultaneously, the cover plate 7 moves the transmission rod 9 around the air-raid shelter door 16 via the transmission block 10. The transmission rod 9 drives the extension piece 13 at one end to embed into the reserved groove 12. Liquid is filled between the cover plate 7 and the base 1 through the pipe 6, with the liquid level higher than the upper part of the air-raid shelter door 16. The pipe 6 is sealed. Gas is then filled into the area between the cover plate 7 and the base 1 through the pressure pump 3 to achieve high pressure. During the test, the user observes whether the liquid flows out from between the air-raid shelter door 16 and the base 1 and into the drain trough. When the pressure is tested, the pressure between the cover plate 7 and the base 1 is measured by the pressure gauge 4. After the pressure is measured, the hydraulic rod 2 contracts and separates the cover plate 7 and the base 1. The high-pressure motor 5 is started. The output shaft of the high-pressure motor 5 drives one of the transmission blocks 10 to rotate. The transmission block 10 drives the remaining three transmission blocks 10 to rotate synchronously through the synchronous belt 11. The transmission block 10 drives the extension piece 13 to rotate through the transmission rod 9, so that the extension piece 13 rotates to the lower end of the outside of the blast door 16. When separating, the longitudinal movement of the cover plate 7 will be pulled by the movement of the transmission block 10, the transmission rod 9 and the extension piece 13, so that the blast door 16 moves longitudinally with the cover plate 7 and is taken out. After the blast door 16 is taken out, the extension piece 13 rotates, and the user can take it out when the extension piece 13 is no longer restricting it.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A device for testing the airtightness of a civil defense door, comprising a base (1), wherein a cover plate (7) is provided on the upper part of the outer side of the base (1), characterized in that, Pressing rods (8) are welded to the four corners of the cover plate (7) facing the inside of the base (1). Four transmission rods (9) are arranged around the four pressing rods (8). The transmission rods (9) are rotatably connected to the cover plate (7) through a transmission block (10). An extension piece (13) is welded to the lower end of the transmission rod (9).

2. The airtightness testing device for air-raid shelter doors according to claim 1, characterized in that, The lower end of the base (1) is provided with a water trough (17), and a reserved groove (12) is provided around the water trough (17). The recessed position of the reserved groove (12) overlaps with the transmission rod (9).

3. The airtightness testing device for air-raid shelter doors according to claim 1, characterized in that, The four transmission blocks (10) are connected by a synchronous belt (11). One of the transmission blocks (10) is equipped with a high-voltage motor (5) at its upper end. The output shaft of the high-voltage motor (5) passes through the cover plate (7) and is fixedly connected to the upper end of the transmission block (10).

4. The airtightness testing device for air-raid shelter doors according to claim 3, characterized in that, The transmission block (10) is provided with a transmission groove (14) in a recess around it, and a pair of support blocks (15) are provided at each of the four corners inside the transmission groove (14).

5. The airtightness testing device for air-raid shelter doors according to claim 1, characterized in that, Pipes (6) are provided on both sides of the base (1).

6. The airtightness testing device for air-raid shelter doors according to claim 3, characterized in that, A pressure pump (3) is provided on one side of the high-voltage motor (5).

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