Comprehensive testing equipment and acceptance method for airtight doors of civil air defense projects

Abstract

The present invention provides a comprehensive detection device and acceptance method for the airtight doors of a building civil air defense project, which effectively solves the problem that the existing on-site detection equipment cannot perform bidirectional testing on the airtightness and cannot test the airtightness of the airtight doors under different air pressures. The scheme is: a comprehensive detection device for the airtight doors of a building civil air defense project, comprising a mobile support unit, a test unit on the mobile support unit, a tightening unit on the right side of the mobile support unit, the test unit comprising an outer shell, a rubber sealing pad at the opening at the left end of the outer shell; a rectangular plate is arranged inside the outer shell, and movable plates are arranged around the rectangular plate; the rectangular plate and four movable plates form an inner chamber opening to the left; a plurality of trapezoidal plates are hinged at the opening at the left end of the outer shell; the outer shell, the rectangular plate, the four movable plates and the four trapezoidal plates form an outer chamber; the test unit also comprises an auxiliary component, the auxiliary component comprises an air pump A and an air pump B, a pressure sensor a is arranged in the inner chamber, and a pressure sensor b is arranged in the outer chamber.

Description

Technical Field

[0001] The invention relates to the technical field of quality detection of building civil air defense projects, in particular to comprehensive detection equipment and an acceptance method for closed doors of building civil air defense projects. Background Art

[0002] The acceptance of construction projects requires professional inspections of all parts of the project, including the quality inspection of the airtight doors of civil air defense projects. The airtightness, explosion-proof and impact-proof performance of the airtight doors of civil air defense projects need to be strictly inspected on site. In the prior art, patent document CN115356052B discloses an on-site detection device and method for air leakage of protective equipment for civil air defense projects. In this scheme, a smoke ball that can generate red smoke is burned, and the red smoke particles that pass through the airtight door are melted into water and collected. The air leakage of the airtight door can be detected by evaporating the water and detecting the weight of the red smoke. However, in use, this scheme has obvious defects. First, this scheme is too idealistic and has little practical significance. In this scheme, red smoke is generated by combustion, and then the leaked smoke is collected and dried to obtain the leakage amount. There are too many uncertain factors in the test, resulting in inaccurate measurement results; second, this scheme cannot simulate instantaneous air explosion impact, so that continuous and multiple explosion-proof tests cannot be carried out; third, only the airtightness of the closed door from right to left can be tested, but not from left to right, that is, only one-way airtightness can be tested, but not two-way airtightness, and the test results are not comprehensive; fourth, this scheme is a static pressure test, that is, the pressure on both sides is basically unchanged, and the pressure difference is basically unchanged, so that the test results are unreliable.

[0003] A comprehensive detection device and acceptance method for closed doors of building civil air defense projects is now provided to solve the above problems. Summary of the invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a comprehensive detection equipment and acceptance method for the closed doors of building civil air defense projects, which effectively solves the problems of inaccurate detection results of existing on-site detection equipment, inability to simulate the shock wave at the moment of explosion, inability to test the airtightness in both directions, and inability to test the sealing of closed doors under different air pressures.

[0005] The technical solution is:

[0006] A comprehensive detection device for airtight doors of building civil air defense projects, comprising a mobile support unit, a test unit installed on the mobile support unit, the test unit performs an airtightness test, and a tightening unit on the right side of the mobile support unit, the tightening unit can buckle the test unit on the airtight door;

[0007] The test unit comprises a shell opening to the left, and a rubber sealing pad for sealing is provided at the opening at the left end of the shell; a rectangular plate parallel to the closed door is provided inside the shell, the rectangular plate can move left and right, and movable plates are hinged around the rectangular plate; the rectangular plate and four movable plates constitute an inner chamber opening to the left; a plurality of trapezoidal plates corresponding to the movable plates are hinged at the opening at the left end of the shell, the trapezoidal plates are isosceles trapezoidal, the shorter bottom sides of the trapezoidal plates are hinged to the movable plates, and the longer bottom sides of the trapezoidal plates are hinged to the opening at the left end of the shell; the shell, the rectangular plate, the four movable plates and the four trapezoidal plates constitute an outer chamber; when the four movable plates are perpendicular to the rectangular plate and the four trapezoidal plates are parallel to the rectangular plate, the inner chamber and the outer chamber are isolated from each other and are not ventilated to each other;

[0008] The test unit also includes an auxiliary component, which includes an air pump A and an air pump B fixed on the outer shell, wherein the inner chamber is connected to the air pump A via a pipeline, and the outer chamber is connected to the air pump B via a pipeline; a pressure sensor a is provided in the inner chamber, and a pressure sensor b is provided in the outer chamber.

[0009] Preferably, a first rubber strip in the shape of a rectangular frame is provided at the edge of the left end face of the rectangular plate, a second U-shaped rubber strip is provided on the side of the movable plate close to the inner chamber, a third rubber strip is provided on the side of the movable plate away from the inner chamber, and a fourth rubber strip corresponding to the third rubber strip is provided on the trapezoidal plate; a sealing ring is provided at the opening at the left end of the outer shell, and the cross-section of the sealing ring is L-shaped, one side of the sealing ring is in close contact with the outer shell, and the other side of the sealing ring is in close contact with the trapezoidal plate.

[0010] Preferably, the mobile support unit includes a base, a plurality of supporting hydraulic cylinders are provided between the base and the lower end of the shell, a plurality of wheels are installed on the lower side of the base, and a vertical plate is fixed above the right end of the base.

[0011] Preferably, the tightening unit comprises a telescopic rod, the left end of which is hinged on the vertical plate, and a fixed plate fixed to the ground is provided on the right side of the base, and the right end of the telescopic rod is tilted downward and hinged to the fixed plate; when the telescopic rod is extended, the test unit can be buckled on the closed door.

[0012] Preferably, a plurality of telescopic hydraulic cylinders are installed between the shell and the rectangular plate.

[0013] Preferably, the outer surface of the rubber pad is arranged to be concave-convex, so that it can play a better sealing role.

[0014] A comprehensive inspection and acceptance method for closed doors of building civil air defense projects, comprising the following steps:

[0015] The first step is to test the sealing of the outer chamber:

[0016] S1: Start the telescopic hydraulic cylinder, which drives the rectangular plate to move to the left until the four movable plates are perpendicular to the rectangular plate and the four trapezoidal plates are parallel to the rectangular plate. At this time, the outer chamber is in a sealed state, and the pressure values ​​sensed by the pressure sensor a and the pressure sensor b should be consistent. If not, they need to be adjusted to be consistent.

[0017] S2: Then the air pump B fills the outer chamber with compressed air and stops when the preset value is reached. If the pressure of the outer chamber remains unchanged within a specific time, it proves that the outer chamber is well sealed; then the outer chamber is depressurized and restored to its original state, and the next step is carried out;

[0018] The second step is to test the sealing of the inner chamber:

[0019] S1: Press the test unit in this device onto the closed door, fix the fixing plate on the ground, and start the telescopic rod to make the test device tightly buckle onto the blank and complete wall;

[0020] S2: Start the telescopic hydraulic cylinder, which drives the rectangular plate to move to the left until the four movable plates are perpendicular to the rectangular plate and the four trapezoidal plates are parallel to the rectangular plate. At this time, the inner chamber and the outer chamber are both in a closed state;

[0021] S3: Air pump A fills the inner chamber with compressed air and stops when the preset value is reached. If the pressure of the outer chamber remains unchanged within a certain period of time, it proves that the inner chamber is well sealed; then the inner chamber is depressurized and returns to its original state;

[0022] The third step is air tightness test under static pressure:

[0023] S1: Push the device to the location where the sealed door to be tested is installed, then fix the fixing plate on the ground, and use the telescopic rod to push the test device to completely press the wall around the sealed door;

[0024] S2: Start the telescopic hydraulic cylinder, which drives the rectangular plate to move to the left until the four movable plates are perpendicular to the rectangular plate and the four trapezoidal plates are parallel to the rectangular plate. At this time, the inner chamber and the outer chamber are both in a closed state;

[0025] S3: The air pump A inflates the inner chamber to a preset pressure. After a certain period of time, the pressure change of the inner chamber is recorded by the pressure sensor a. This is repeated several times to obtain the leakage amount of the sealing door from the right side to the left side.

[0026] S4: Air pump A draws air outward, making the inner chamber in a negative pressure state and reaching a preset value. After a certain period of time, the pressure change of the inner chamber is recorded by pressure sensor a. Repeat this process several times to obtain the leakage amount of the sealing door from the left side to the right side.

[0027] Step 4: Simulated explosion impact test:

[0028] S1: Based on the third step, the air pump B inflates the outer chamber to a preset high pressure, and then starts the telescopic hydraulic cylinder, which drives the rectangular plate to move rapidly to the right. At this time, the high-pressure air in the outer chamber instantly rushes into the inner chamber, simulating an explosion shock wave; repeat multiple times;

[0029] S2: Using Boyle's law and the pressure-area formula, we can find the instantaneous impact force on the closed door;

[0030] S3: Finally, the third step is repeated to obtain the influence of the explosion shock on the sealing performance of the sealed door and the explosion resistance level of the sealed door.

[0031] The present invention has the following advantages:

[0032] 1. The present invention can measure the bidirectional sealing performance of a closed door by setting an inner chamber and an outer chamber and controlling the air pressure of the two chambers. Compared with the traditional unidirectional test, the results measured by the present invention are more accurate and reliable.

[0033] 2. The present invention can simulate explosion impacts of different degrees by controlling the air pressure in the outer chamber, and can measure the explosion-proof sealing level of the closed door.

[0034] 3. The present invention can conduct multiple tests continuously and can more realistically measure the safety performance of the closed door.

[0035] 4. The present invention can not only perform static pressure test, but also perform explosion impact test. It is flexible, convenient and fully functional. It is suitable for quality inspection of civil air defense equipment in construction projects. Of course, the device can also be used for air tightness inspection of windows.

[0036] In summary, the present invention has an ingenious structure and can perform two-way airtightness detection on closed doors on site, obtain leakage volume through changes in air pressure, and can also simulate explosions of different degrees multiple times and continuously, thereby realizing detection of explosion-proof performance of closed doors and greatly improving the reliability of test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is the front view of the present invention.

[0038] Figure 2 The present invention is a three-dimensional Figure 1 .

[0039] Figure 3 The present invention is a three-dimensional Figure 2 .

[0040] Figure 4 It is an exploded view of the present invention.

[0041] Figure 5 It is a front cross-sectional view of the present invention.

[0042] Figure 6 It is a left view of the present invention.

[0043] Figure 7 It is the right view of the present invention.

[0044] Figure 8 This is a diagram showing the inner chamber being sealed. Figure 1 .

[0045] Fig. 9 This is a diagram showing the inner chamber being sealed. Figure 2 .

[0046] Fig.10 Exploded diagram of rectangular plate, movable plate and trapezoidal plate.

[0047] Fig.11 This is a diagram showing that the inner chamber is not sealed. Figure 1 .

[0048] Fig.12 This is a diagram showing that the inner chamber is not sealed. Figure 2 .

[0049] Fig.13 It is a schematic diagram of the movable plate and the second sealing strip and the third sealing strip thereon.

[0050] Fig.14 It is a structural diagram of the trapezoidal plate and the fourth sealing strip thereon. DETAILED DESCRIPTION

[0051] The specific implementation modes of the present invention are further described in detail below with reference to the accompanying drawings.

[0052] Depend on Figure 1 , 2 Given, a comprehensive detection device for closed doors of building civil air defense projects, such as Figure 1 As shown, it includes a mobile support unit 1, on which a test unit 2 is installed, and the test unit 2 performs a tightness test. A tightening unit 3 is provided on the right side of the mobile support unit 1, and the tightening unit 3 can press the test unit 2 on the closed door;

[0053] like Figure 3 , 4As shown in FIG. 10 , the test unit 2 comprises a shell 201 with an opening to the left, and a rubber sealing pad 202 for sealing is provided at the opening at the left end of the shell 201; a rectangular plate 203 parallel to the closed door is provided in the shell 201, and the rectangular plate 203 can move left and right, and movable plates 204 are hinged around the rectangular plate 203; the rectangular plate 203 and four movable plates 204 form an inner chamber 205 with an opening to the left; a plurality of trapezoidal plates 206 corresponding to the movable plates 204 are hinged at the opening at the left end of the shell 201 , the trapezoidal plate 206 is an isosceles trapezoid, the shorter bottom side of the trapezoidal plate 206 is hinged to the movable plate 204, and the longer bottom side of the trapezoidal plate 206 is hinged to the left end opening of the shell 201; the shell 201, the rectangular plate 203, the four movable plates 204 and the four trapezoidal plates 206 form an outer chamber 207; when the four movable plates 204 are perpendicular to the rectangular plate 203 and the four trapezoidal plates 206 are parallel to the rectangular plate 203, the inner chamber 205 and the outer chamber 207 are isolated from each other and are not ventilated to each other;

[0054] like Figure 5 As shown, the test unit 2 also includes auxiliary components, which include an air pump A208 and an air pump B209 fixed on the outer shell 201, wherein the inner chamber 205 is connected to the air pump A208 via a pipeline, and the outer chamber 207 is connected to the air pump B209 via a pipeline; a pressure sensor a210 is provided in the inner chamber 205, and a pressure sensor b211 is provided in the outer chamber 207.

[0055] like Figure 4 , 10 As shown, in order to achieve a sealing effect between the inner chamber 205 and the outer chamber 207, a rectangular frame-shaped first rubber strip 212 is provided at the edge of the left end face of the rectangular plate 203, a U-shaped second rubber strip 213 is provided on the side of the movable plate 204 close to the inner chamber 205, a third rubber strip 214 is provided on the side of the movable plate 204 away from the inner chamber, and a fourth rubber strip 215 corresponding to the third rubber strip 214 is provided on the trapezoidal plate 206; a sealing ring 216 is provided at the opening at the left end of the outer shell 201, and the cross-section of the sealing ring 216 is L-shaped, one side of the sealing ring 216 is in close contact with the outer shell 201, and the other side of the sealing ring 216 is in close contact with the trapezoidal plate 206.

[0056] like Figures 1 to 5 As shown, the mobile support unit 1 includes a base 101 , a plurality of support hydraulic cylinders 102 are provided between the base 101 and the lower end of the housing 201 , a plurality of wheels 103 are installed on the lower side of the base 101 , and a vertical plate 104 is fixed above the right end of the base 101 .

[0057] like Figure 2 , 4As shown in Figure 5, the tightening unit 3 includes a telescopic rod 301, the left end of which is hinged on the vertical plate 104, and a fixed plate 302 fixed to the ground is provided on the right side of the base 101. The right end of the telescopic rod 301 is tilted downward and hinged to the fixed plate 302; the telescopic rod 301 is extended to press the test unit 2 on the closed door.

[0058] like Figure 4 , 5 As shown, a plurality of telescopic hydraulic cylinders 217 are installed between the housing 201 and the rectangular plate 203 .

[0059] like Figure 3 , 6 As shown, the outer surface of the rubber pad is arranged to be concave-convex, so that it can play a better sealing role.

[0060] like Fig.10 , 11 As shown in FIG. 14 , sealing layers are provided on both sides of the trapezoidal plate 206 . When the four trapezoidal plates 206 are parallel to the rectangular plate 203 , the four trapezoidal plates 206 are connected end to end, and the space between two adjacent trapezoidal plates 206 is sealed by the sealing layer.

[0061] A comprehensive inspection and acceptance method for closed doors of building civil air defense projects, comprising the following steps:

[0062] The first step is to test the sealing of the outer chamber 207:

[0063] S1: Start the telescopic hydraulic cylinder 217, which drives the rectangular plate 203 to move to the left until the four movable plates 204 are perpendicular to the rectangular plate 203 and the four trapezoidal plates 206 are parallel to the rectangular plate 203. At this time, the outer chamber 207 is in a sealed state, and the pressure values ​​sensed by the pressure sensor a210 and the pressure sensor b211 should be consistent. If not, they need to be adjusted to be consistent.

[0064] S2: Then the air pump B209 fills the outer chamber 207 with compressed air, and stops when the preset value is reached. If the pressure of the outer chamber 207 remains unchanged within a specific time, it proves that the outer chamber 207 is well sealed; then the outer chamber 207 is depressurized and restored to its original state, and the next step is carried out;

[0065] The second step is to test the sealing of the inner chamber 205:

[0066] S1: buckle the test unit 2 in the device onto the closed door, fix the fixing plate 302 on the ground, and start the telescopic rod 301 to make the test device buckle tightly onto the blank and complete wall;

[0067] S2: Start the telescopic hydraulic cylinder 217, which drives the rectangular plate 203 to move to the left until the four movable plates 204 are perpendicular to the rectangular plate 203 and the four trapezoidal plates 206 are parallel to the rectangular plate 203. At this time, the inner chamber 205 and the outer chamber 207 are both in a closed state;

[0068] S3: The air pump A208 fills the inner chamber 205 with compressed air, and stops when the preset value is reached. If the pressure of the outer chamber 207 remains unchanged within a certain period of time, it proves that the inner chamber 205 is well sealed; then the inner chamber 205 is depressurized and restored to its original state;

[0069] The third step is air tightness test under static pressure:

[0070] S1: Push the device to the location where the sealed door to be tested is installed, then fix the fixing plate on the ground, and push the telescopic rod 301 against the test device to completely press the wall around the sealed door;

[0071] S2: Start the telescopic hydraulic cylinder 217, which drives the rectangular plate 203 to move to the left until the four movable plates 204 are perpendicular to the rectangular plate 203 and the four trapezoidal plates 206 are parallel to the rectangular plate 203. At this time, the inner chamber 205 and the outer chamber 207 are both in a closed state;

[0072] S3: The air pump A208 inflates the inner chamber 205 to a preset pressure. After a specific period of time, the pressure sensor a210 records the pressure change of the inner chamber 205. Repeat this process several times to obtain the leakage amount of the sealing door from the right side to the left side.

[0073] S4: The air pump A208 draws air outward, so that the inner chamber 205 is in a negative pressure state and reaches a preset value. After a certain period of time, the pressure change of the inner chamber 205 is recorded by the pressure sensor a210. Repeat this process several times to obtain the leakage amount of the sealing door from the left side to the right side.

[0074] Step 4: Simulated explosion impact test:

[0075] S1: Based on the third step, the air pump B209 inflates the outer chamber 207 to reach a preset high pressure, and then starts the telescopic hydraulic cylinder 217, which drives the rectangular plate 203 to move rapidly to the right. At this time, the high-pressure air in the outer chamber 207 instantly flows into the inner chamber 205, simulating an explosion shock wave; repeat multiple times;

[0076] S2: Using Boyle's law and the pressure-area formula, we can find the instantaneous impact force on the closed door;

[0077] S3: Finally, the third step is repeated to obtain the influence of the explosion shock on the sealing performance of the sealed door and the explosion resistance level of the sealed door.

[0078] It is worth noting that in the fourth step above, the greater the pressure in the outer chamber 207 after inflation, the greater the impact force of the high-pressure air on the closed door at the moment the rectangular plate 203 moves to the right; thus, it can be concluded that by controlling the pressure in the outer chamber 207, the shock waves of different explosions can be simulated.

[0079] The cross section of the rubber sealing pad 202 at the left end opening of the housing 201 is L-shaped; the surface of the rubber sealing pad 202 in contact with the wall adopts a concave-convex design to ensure the sealing between the wall and the rubber sealing pad 202 as much as possible, and to ensure the airtightness between the wall and the equipment.

[0080] The lower end of the fixing plate is provided with fine conical protrusions, which can buckle the ground to fix itself. If necessary, the fixing plate can be fixed with ground nails.

[0081] The vertical plate 104 is in close contact with the right end surface of the housing 201, so that the pressing unit 3 can press the test unit 2 against the wall, provide good support for the test unit 2, and ensure the accuracy of the test result.

[0082] Before use, the sealing of the outer chamber 207 and the inner chamber 205 needs to be tested respectively. Specifically:

[0083] Test the sealing of the outer chamber 207: start the telescopic hydraulic cylinder 217, which drives the rectangular plate 203 to move to the left until the four movable plates 204 are perpendicular to the rectangular plate 203 and the four trapezoidal plates 206 are parallel to the rectangular plate 203. At this time, the outer chamber 207 is in a sealed state, and the pressure values ​​sensed by the pressure sensor a210 and the pressure sensor b211 should be consistent and consistent with the external atmospheric pressure. If they are inconsistent, they need to be adjusted to be consistent. As a test device, this step can ensure that the outer chamber 207 can be completely sealed, so that the accurate air pressure change amplitude can be tested later, which is conducive to controlling the simulated explosion intensity.

[0084] Test the sealing of the inner chamber 205: Similar to the above, the difference is that the device needs to be buckled on a blank and complete wall, and then the inner chamber 205 is inflated. When the preset value is reached, stop. If the pressure of the outer chamber 207 remains unchanged within a specific time, it proves that the inner chamber 205 is well sealed; then the inner chamber 205 is depressurized and restored to its original state. This step is intended to ensure that the inner chamber 205 is completely sealed from the outside during measurement, and the rubber sealing pad 202 can play an absolute sealing role, which is also an important measure to ensure the accuracy of the test results.

[0085] In summary, it is necessary to test the sealing of the inner chamber 205 and the outer chamber 207 before the test. It is an important measure to ensure the accuracy of the measurement and also a self-check of the equipment and "zeroing" before the test. The pressure sensor a210 in the inner chamber 205 and the pressure sensor b211 in the outer chamber 207 also serve as a reference and mutual verification to ensure the accuracy of the test results.

[0086] Through the above, it can be obtained that each sealing strip in the device plays the sealing role that it should play, the device is normal, and then the simulated explosion impact test can be carried out. Specifically, the test unit 2 in the device is buckled on the closed door, and the telescopic rod 301 in the tightening unit 3 tightens the test device on the wall around the closed door, and the rubber sealing pad 202 is tightly sealed with the wall; at this time, the air pump B209 fills the outer chamber 207 with compressed air, and stops when the preset value is reached, and the telescopic hydraulic cylinder 217 is started. The telescopic hydraulic cylinder 217 moves rapidly to the right with the rectangular plate 203, and the high-pressure air instantly flows into the inner chamber 205 and impacts the closed door to complete a simulated air explosion test. Of course, it can be clearly seen from the above that the present invention also supports continuous multiple tests, which can more realistically measure the safety performance of the closed door. After repeated multiple times, a static pressure sealing test is carried out. By controlling the air pressure in the outer chamber 207, it is possible to simulate different degrees of explosion impact and measure the explosion-proof sealing level of the closed door.

[0087] Static pressure air tightness test: air pump A208 inflates the inner chamber 205 to make it positive pressure and make the inner chamber 205 reach the preset pressure. After a certain period of time, the pressure change of the inner chamber 205 is recorded by the pressure sensor a210. Repeat this process many times to obtain the leakage of the sealed door from the right to the left. Air pump A208 draws air outward to make the inner chamber 205 in a negative pressure state and reach the preset value. After a certain period of time, the pressure change of the inner chamber 205 is recorded by the pressure sensor a210. Repeat this process many times to obtain the leakage of the sealed door from the left to the right. Then, according to the measurement results and data, the leakage amount can be obtained.

[0088] The present invention can not only perform static pressure test, but also perform explosion impact test, which is flexible, convenient and fully functional, and is suitable for quality inspection of civil air defense equipment in construction projects. Of course, the device can also be used for air tightness inspection of windows.

Claims

1. A comprehensive detection device for closed doors of building civil air defense projects, characterized in that: The mobile support unit (1) comprises a test unit (2) mounted on the mobile support unit (1), the test unit (2) performs a sealing test, and a tightening unit (3) is provided on the right side of the mobile support unit (1), the tightening unit (3) can press the test unit (2) onto the sealed door; The test unit (2) comprises a shell (201) with an opening facing leftward, and a rubber sealing pad (202) having a sealing function is provided at the opening at the left end of the shell (201); a rectangular plate (203) parallel to the sealed door is provided inside the shell (201), the rectangular plate (203) can move leftward and rightward, and movable plates (204) are hingedly connected around the rectangular plate (203); the rectangular plate (203) and four movable plates (204) form an inner chamber (205) with an opening facing leftward; a plurality of trapezoidal plates (206) corresponding to the movable plates (204) are hingedly connected at the opening at the left end of the shell (201), and the trapezoidal plates (206) are hingedly connected to the inner chamber (205) with an opening facing leftward. (206) is in the shape of an isosceles trapezoid, the shorter bottom side of the trapezoidal plate (206) is hinged to the movable plate (204), and the longer bottom side of the trapezoidal plate (206) is hinged to the left end opening of the outer shell (201); the outer shell (201), the rectangular plate (203), the four movable plates (204) and the four trapezoidal plates (206) form an outer chamber (207); when the four movable plates (204) are perpendicular to the rectangular plate (203) and the four trapezoidal plates (206) are parallel to the rectangular plate (203), the inner chamber (205) and the outer chamber (207) are isolated from each other and are not ventilated to each other; The test unit (2) further comprises an auxiliary component, the auxiliary component comprising an air pump A (208) and an air pump B (209) fixed on the housing (201), wherein the inner chamber (205) and the air pump A (208) are connected via a pipeline, and the outer chamber (207) and the air pump B (209) are connected via a pipeline; a pressure sensor a (210) is provided in the inner chamber (205), and a pressure sensor b (211) is provided in the outer chamber (207).

2. A comprehensive detection device for airtight doors of building air defense projects according to claim 1, characterized in that: A rectangular frame-shaped first rubber strip (212) is provided at the edge of the left end face of the rectangular plate (203); a U-shaped second rubber strip (213) is provided on the side of the movable plate (204) close to the inner chamber (205); a third rubber strip (214) is provided on the side of the movable plate (204) away from the inner chamber; and a fourth rubber strip (215) corresponding to the third rubber strip (214) is provided on the trapezoidal plate (206); a sealing ring (216) is provided at the opening at the left end of the outer shell (201); the cross section of the sealing ring (216) is L-shaped; one side of the sealing ring (216) is in close contact with the outer shell (201), and the other side of the sealing ring (216) is in close contact with the trapezoidal plate (206).

3. A comprehensive detection device for airtight doors of building air defense projects according to claim 1, characterized in that: The mobile support unit (1) comprises a base (101), a plurality of support hydraulic cylinders (102) are arranged between the base (101) and the lower end of the housing (201), a plurality of wheels (103) are installed on the lower side of the base (101), and a vertical plate (104) is fixed above the right end of the base (101).

4. A comprehensive detection device for airtight doors of building air defense projects according to claim 1, characterized in that: The tightening unit (3) comprises a telescopic rod (301), the left end of the telescopic rod (301) is hinged on the vertical plate (104), a fixing plate (302) fixed to the ground is provided on the right side of the base (101), and the right end of the telescopic rod (301) is tilted downward and hinged to the fixing plate (302); the telescopic rod (301) is extended to press the test unit (2) onto the closed door.

5. The comprehensive detection equipment for airtight doors of building air defense projects according to claim 1 is characterized in that: A plurality of telescopic hydraulic cylinders (217) are installed between the housing (201) and the rectangular plate (203).

6. A comprehensive detection device for airtight doors of building air defense projects according to claim 1, characterized in that: The outer surface of the rubber pad is arranged to be concave and convex, so that it can play a better sealing role.

7. The comprehensive detection equipment for airtight doors of building air defense projects according to claim 1 is characterized in that: Sealing layers are provided on both sides of the trapezoidal plates (206); when the four trapezoidal plates (206) are parallel to the rectangular plates (203), the four trapezoidal plates (206) are connected end to end, and the space between two adjacent trapezoidal plates (206) is sealed by the sealing layer.

8. A comprehensive inspection and acceptance method for closed doors of building civil air defense projects, comprising the following steps: The first step is to test the sealing of the outer chamber (207): S1: Start the telescopic hydraulic cylinder (217), and the telescopic hydraulic cylinder (217) drives the rectangular plate (203) to move to the left until the four movable plates (204) are perpendicular to the rectangular plate (203) and the four trapezoidal plates (206) are parallel to the rectangular plate (203). At this time, the outer chamber (207) is in a sealed state, and the pressure values ​​sensed by the pressure sensor a (210) and the pressure sensor b (211) should be consistent. If not, they need to be adjusted to be consistent. S2: The air pump B (209) then fills the outer chamber (207) with compressed air, and stops when the pressure reaches a preset value. If the pressure of the outer chamber (207) remains unchanged within a specific time, it proves that the outer chamber (207) is well sealed; then the outer chamber (207) is depressurized and restored to its original state, and the next step is performed; The second step is to test the sealing of the inner chamber (205): S1: buckle the test unit (2) in the device onto the sealed door, fix the fixing plate (302) on the ground, and start the telescopic rod (301) to make the test device buckle tightly onto the blank and complete wall; S2: Start the telescopic hydraulic cylinder (217), which drives the rectangular plate (203) to move leftward until the four movable plates (204) are perpendicular to the rectangular plate (203) and the four trapezoidal plates (206) are parallel to the rectangular plate (203). At this time, the inner chamber (205) and the outer chamber (207) are both in a closed state; S3: The air pump A (208) fills the inner chamber (205) with compressed air, and stops when the preset value is reached. If the pressure of the outer chamber (207) remains unchanged within a specific time, it proves that the inner chamber (205) is well sealed; then the inner chamber (205) is depressurized and restored to its original state; The third step is air tightness test under static pressure: S1: Push the device to the location where the sealed door to be tested is installed, then fix the fixing plate (302) on the ground, and use the telescopic rod (301) to push the test device so that it completely presses the wall around the sealed door; S2: Start the telescopic hydraulic cylinder (217), which drives the rectangular plate (203) to move leftward until the four movable plates (204) are perpendicular to the rectangular plate (203) and the four trapezoidal plates (206) are parallel to the rectangular plate (203). At this time, the inner chamber (205) and the outer chamber (207) are both in a closed state; S3: the air pump A (208) inflates the inner chamber (205) to a preset pressure, and after a specific period of time, the pressure change of the inner chamber (205) is recorded by the pressure sensor a (210); this is repeated multiple times to obtain the leakage amount of the sealing door from the right side to the left side; S4: the air pump A (208) draws air outward, so that the inner chamber (205) is in a negative pressure state and reaches a preset value. After a specific period of time, the pressure change of the inner chamber (205) is recorded by the pressure sensor a (210); this is repeated multiple times to obtain the leakage amount of the sealing door from the left side to the right side; Step 4: Simulated explosion impact test: S1: Based on the third step, the air pump B (209) inflates the outer chamber (207) to make the outer chamber (207) reach a preset high pressure, and then starts the telescopic hydraulic cylinder (217). The telescopic hydraulic cylinder (217) drives the rectangular plate (203) to move rapidly to the right. At this time, the high-pressure air in the outer chamber (207) instantly flows into the inner chamber (205), simulating an explosion shock wave; repeat multiple times; S2: Using Boyle's law and the pressure-area formula, we can derive the instantaneous impact force on the closed door; S3: Finally, the third step is repeated to obtain the influence of the explosion shock on the sealing performance of the sealed door and the explosion resistance level of the sealed door.

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