Explosion-proof tank hydraulic pressure test device and test method thereof

Abstract

The invention provides an explosion-proof tank hydraulic pressure test device and a test method thereof, and belongs to the technical field of explosion-proof tank hydraulic pressure tests. A hydraulic pressure test device for an explosion-proof box comprises an L-shaped rack, a concave support, a concave bearing plate, a vertical rod, an L-shaped connecting pipe, a first circular moving block and abutting parts, when a pressing plate descends, the pressing plate can be used for pressing the top of the explosion-proof box placed on the concave bearing plate, and meanwhile the two abutting parts are driven to abut against the two corresponding sides of the explosion-proof box respectively, so that the top of the explosion-proof box is pressed. When the pressing plate ascends to be separated from the top of the explosion-proof box, the two abutting parts do not make contact with the two corresponding sides of the explosion-proof box. Double clamping of the top and the side face of the explosion-proof box is achieved by driving the pressing plate to descend, the clamping force and stress uniformity are remarkably enhanced, the test stability and safety are improved, meanwhile, the second circular moving block is used for conveying gas to be matched with the pressing plate to blow gas to the top of the explosion-proof box, the explosion-proof box is cleaned, the contact effect is optimized, and it is ensured that test data are accurate.

Description

Technical Field

[0001] The invention relates to the technical field of water pressure testing of explosion-proof boxes, and in particular to a water pressure testing device for explosion-proof boxes and a testing method thereof. Background Art

[0002] During the production and use of explosion-proof boxes, it is extremely important to ensure the stability and reliability of their quality and performance. In order to verify the pressure-bearing capacity of explosion-proof boxes in extreme environments, water pressure testing is an indispensable part.

[0003] When conducting a water pressure test, a traditional explosion-proof box is usually placed on a test bench, and then a pressure plate is pressed on the top of the explosion-proof box to fix the explosion-proof box on the test bench. This single clamping method may cause the explosion-proof box to shake or even shift when facing the huge pressure of the water pressure test due to insufficient clamping force or uneven force distribution, which will seriously affect the accuracy and reliability of the test. To this end, in response to this problem, the present invention proposes an explosion-proof box water pressure test device and a test method thereof. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide an explosion-proof box water pressure test device and a test method thereof that can overcome the above problems or at least partially solve the above problems.

[0005] The L-shaped support frame is an L-shaped support frame having a plurality of L-shaped support members, each of which is provided with a plurality of L-shaped support members, each of which is provided with a plurality of L-shaped support members.

[0006] Preferably, four L-shaped blocks are connected to the top of the concave bearing plate, and the area formed between the four L-shaped blocks can be used to position the explosion-proof box when it is placed on the top of the concave bearing plate.

[0007] Preferably, a pair of support rods are slidably connected to the concave supporting plate, one end of the support rod is fixedly connected to the side wall of the L-shaped frame, a mounting block is fixedly connected between the other end of the support rod and the bottom wall of the L-shaped frame, a driving part 1 is installed on the L-shaped frame, and an output end of the driving part 1 is fixedly connected to the corresponding surface of the concave supporting plate.

[0008] Preferably, a plurality of concave grooves are formed at the bottom of the concave supporting plate, a rotating shaft is rotatably connected between the inner walls of the concave grooves, and a moving wheel that fits the bottom wall of the L-shaped frame is fixedly connected to the rotating shaft.

[0009] Preferably, a second driving part is installed on the concave bracket, and an output end of the second driving part is fixedly connected to the top of the pressing plate.

[0010] Preferably, an L-shaped fixing frame is fixedly connected to the L-shaped connecting pipe, and the L-shaped fixing frame is fixedly connected to the side wall of the concave bracket.

[0011] Preferably, the resistance part includes a moving rod slidably connected to the L-shaped connecting tube, one end of the moving rod is fixedly connected to a corresponding resistance plate located outside the L-shaped connecting tube, and the other end of the moving rod is fixedly connected to a circular moving block 2 that fits the inner wall of the L-shaped connecting tube, and a spring is sleeved on the moving rod, and the spring is fixedly connected between the circular moving block 2 and the side wall of the L-shaped connecting tube.

[0012] Preferably, an air collecting chamber is provided inside the pressure plate, and filter holes are evenly distributed between the bottom wall of the air collecting chamber and the bottom of the pressure plate. When the circular moving block 2 slides along the inner wall of the L-shaped connecting tube, an air guide portion is connected between the L-shaped connecting tube and the air collecting chamber.

[0013] Preferably, the air guide portion is a connecting hose, one end of which is connected to the surface of the L-shaped connecting pipe, and the other end of which is connected to the side wall of the gas collecting cavity.

[0014] The present invention also provides a method for testing the water pressure of an explosion-proof box, comprising:

[0015] Step S1, placing the explosion-proof box on the top of the concave carrying plate, and starting the longitudinal moving mechanism of the concave carrying plate to smoothly transport the explosion-proof box to the bottom of the pressing plate;

[0016] Step S2, start the lifting mechanism of the pressure plate to make the pressure plate begin to descend. During the descent of the pressure plate, the vertical rod drives the circular moving block to slide along the inner wall of the L-shaped connecting tube, compressing the gas inside the L-shaped connecting tube to push the abutment part to move toward the side of the explosion-proof box until the abutment part is in close contact with both sides of the explosion-proof box to achieve multi-directional clamping;

[0017] Step S3, after the explosion-proof box is stably clamped, connect the external water pressure device to the connecting pipe on the surface of the explosion-proof box. When ensuring that the connection is firm and there is no leakage, turn on the switch of the water pressure device to start the water pressure test on the explosion-proof box. According to the test requirements, adjust the size and duration of the water pressure, and observe the deformation or leakage of the explosion-proof box under the action of the water pressure.

[0018] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: when the pressure plate is driven to descend, the present invention can not only tightly clamp the top of the explosion-proof box, but also realize the clamping of the side of the explosion-proof box by the resistance plate through the coordinated action of the L-shaped connecting pipe and the vertical rod. This clamping method not only significantly improves the clamping force, but also ensures the uniformity of the force distribution, thereby greatly enhancing the stability and safety of the test;

[0019] Furthermore, the circular movable block 2 in the present invention, while pushing the contact plate to clamp the side of the explosion-proof box, also cleverly transports the gas inside the horizontal section of the L-shaped connecting pipe to the gas collecting chamber. Subsequently, the gas is evenly ejected through the filter holes, so that at the moment when the pressure plate contacts the top of the explosion-proof box, the top of the explosion-proof box can be effectively blown away. This blowing action can not only blow away the dust and impurities attached to the top of the explosion-proof box, thereby keeping the test environment clean, but also improve the contact effect between the pressure plate and the top of the explosion-proof box, thereby ensuring the accuracy of the test data. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A front view of the structure of a water pressure test device for an explosion-proof box provided by the present invention Figure 1 ;

[0021] Figure 2 A front cross-sectional structure diagram of a water pressure test device for an explosion-proof box provided by the present invention Figure 1 ;

[0022] Figure 3 For the present invention Figure 2 A schematic diagram of the partially enlarged structure at center A;

[0023] Figure 4 A front view of the structure of a water pressure test device for an explosion-proof box provided by the present invention Figure 2 ;

[0024] Figure 5 A front cross-sectional structure diagram of a water pressure test device for an explosion-proof box provided by the present invention Figure 2 ;

[0025] Figure 6 For the present invention Figure 5 A schematic diagram of the partially enlarged structure at B in the middle;

[0026] Figure 7A schematic diagram of the connection structure between the moving wheel and the concave bearing plate of an explosion-proof box water pressure test device provided by the present invention;

[0027] Figure 8 For the present invention Figure 2 A schematic diagram of the partially enlarged structure at C in the middle;

[0028] Fig. 9 A front view of the structure of a water pressure test device for an explosion-proof box provided by the present invention Figure 3 .

[0029] In the figure: 1. L-shaped rack; 2. concave bracket;

[0030] 3. concave bearing plate; 31. L-shaped block; 32. support rod; 33. mounting block; 34. driving part 1; 35. concave groove; 36. rotating shaft; 37. moving wheel;

[0031] 4. Pressing plate; 41. Vertical rod; 42. L-shaped connecting pipe; 43. Circular moving block 1; 44. Rejection part; 441. Moving rod; 442. Rejection plate; 443. Circular moving block 2; 444. Spring; 45. Gas collecting chamber; 46. Filter mesh hole; 47. Gas guide part;

[0032] 5. Driving unit 2; 6. L-shaped fixing bracket. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments so that those skilled in the art can implement the invention with reference to the description.

[0034] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0035] In the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. to indicate directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0036] Example 1: Reference Figure 1-Figure 9A water pressure test device for an explosion-proof box comprises an L-shaped frame 1, and a concave bracket 2 fixed on the L-shaped frame 1, a concave bearing plate 3 for longitudinal movement is provided above the bottom wall of the L-shaped frame 1, a pressing plate 4 for lifting and lowering below the top wall of the concave bracket 2 is provided above the concave bearing plate 3, a pair of vertical rods 41 are fixedly connected to the bottom of the pressing plate 4, an L-shaped connecting pipe 42 is sleeved on the surface of the vertical rod 41, an L-shaped fixing frame 6 is fixedly connected to the L-shaped connecting pipe 42, and the L-shaped fixing frame 6 is fixedly connected to the concave bracket 2, one end of the vertical rod 41 located inside the L-shaped connecting tube 42 is fixedly connected to a circular moving block 43 that fits the inner wall of the L-shaped connecting tube 42, and the other end of the L-shaped connecting tube 42 is provided with a resisting portion 44. When the pressing plate 4 descends, it can be used to press the top of the explosion-proof box placed on the concave supporting plate 3, and at the same time, the two resisting portions 44 are driven to respectively resist on the corresponding two sides of the explosion-proof box. When the pressing plate 4 rises and leaves the top of the explosion-proof box, the two resisting portions 44 do not contact the corresponding two sides of the explosion-proof box.

[0037] According to the above technical solution, when conducting a water pressure test on the explosion-proof box, first, the explosion-proof box needs to be placed on the top of the concave carrier plate 3, and then, the explosion-proof box is accurately transported to the bottom of the pressing plate 4 through the longitudinal moving mechanism of the concave carrier plate 3, and it is ensured that the movement stops at this position. Then, the lifting mechanism driving the pressing plate 4 is started to slowly descend the pressing plate 4 until it is tightly against the top of the explosion-proof box. In the process of the pressing plate 4 descending, the vertical rod 41 will move with the descent of the pressing plate 4, and at the same time drive the circular moving block 43 to move along the inner wall of the L-shaped connecting pipe 42. Slide smoothly and compress the gas inside the L-shaped connecting tube 42, thereby pushing the abutment part 44 to move toward the side of the explosion-proof box until it tightly abuts against both sides of the explosion-proof box. This clamping method not only improves the clamping force, but also ensures the uniformity of force distribution, thereby effectively avoiding the shaking or displacement of the explosion-proof box during the test, thereby ensuring the accuracy and reliability of the test. Once the explosion-proof box is firmly clamped, the external water pressure device can be tightly connected to the connecting tube on the surface of the explosion-proof box, and the water pressure device can be started to start the water pressure test on the explosion-proof box.

[0038] Reference Figure 1 , Figure 4 and Fig. 9Furthermore, in order to improve the stability and positioning accuracy of the explosion-proof box on the concave supporting plate 3, four L-shaped blocks 31 are connected to the top of the concave supporting plate 3. The area formed between the four L-shaped blocks 31 is carefully designed according to the actual size of the explosion-proof box. In this way, when the explosion-proof box is placed on the top of the concave supporting plate 3, the explosion-proof box will be effectively positioned and confined in this area by the four L-shaped blocks 31. Due to this customized design, when the concave supporting plate 3 moves longitudinally and transports the explosion-proof box to just below the pressing plate 4, the explosion-proof box can maintain a stable position without shifting. The four L-shaped blocks 31 not only provide the necessary support for the explosion-proof box, but also ensure the stability and accuracy of the explosion-proof box during the entire transportation and testing process.

[0039] Reference Figure 1 and Fig. 9 Furthermore, in order to realize the longitudinal movement of the concave carrying plate 3, a pair of support rods 32 are slidably connected to the concave carrying plate 3, one end of the support rod 32 is fixedly connected to the side wall of the L-shaped frame 1, and a mounting block 33 is fixedly connected between the other end of the support rod 32 and the bottom wall of the L-shaped frame 1. A driving part 34 is installed on the L-shaped frame 1, and the output end of the driving part 34 is fixedly connected to the corresponding surface of the concave carrying plate 3. When in use, the driving part 34 using the cylinder is started to drive the concave carrying plate 3 to slide along the surfaces of the two support rods 32, so that the explosion-proof box placed on the concave carrying plate 3 can be transported to the bottom of the pressing plate 4 for clamping.

[0040] Reference Figure 7 Furthermore, in order to improve the carrying capacity of the support rod 32 and optimize the mobility of the concave bearing plate 3, a plurality of concave grooves 35 are provided at the bottom of the concave bearing plate 3, and a rotating shaft 36 is rotatably connected between the inner walls of the concave grooves 35, and a moving wheel 37 that fits the bottom wall of the L-shaped frame 1 is fixedly connected to the rotating shaft 36. When the concave bearing plate 3 needs to move and the moving wheel 37 comes into contact with the bottom wall of the L-shaped frame 1, these moving wheels 37 can not only ensure that the concave bearing plate 3 slides smoothly on the L-shaped frame 1, but also enhance the supporting effect of the support rod 32 on the explosion-proof box by sharing part of the weight. In other words, the moving wheel 37 not only plays a role of lubrication and guidance, but also serves as an additional support point, further improving the stability and carrying capacity of the entire structure.

[0041] Reference Figure 1 , Figure 2 , Figure 4 , Figure 5 and Fig. 9Furthermore, in order to drive the lifting movement of the pressing plate 4, a driving part 25 is installed on the concave bracket 2, and the output end of the driving part 25 is fixedly connected to the top of the pressing plate 4. When the pressing plate 4 needs to be lowered, it only needs to start the driving part 25 using the cylinder, which will drive the pressing plate 4 to descend smoothly, and is used to cooperate with the pressing plate 4 to clamp the top of the explosion-proof box.

[0042] Reference Figure 3 and Figure 6 Furthermore, in order to squeeze the gas inside the L-shaped connecting tube 42 with the help of the circular moving block 1 43, it is used to cooperate with the resistance part 44 to clamp the side of the explosion-proof box. The resistance part 44 includes a moving rod 441 slidably connected to the L-shaped connecting tube 42, one end of the moving rod 441 is fixedly connected to a corresponding resistance plate 442 located outside the L-shaped connecting tube 42, and the other end of the moving rod 441 is fixedly connected to a circular moving block 2 443 that fits the inner wall of the L-shaped connecting tube 42. A spring 444 is sleeved on the moving rod 441, and the spring 444 is fixedly connected between the circular moving block 2 443 and the side wall of the L-shaped connecting tube 42.

[0043] It is worth noting that the circular moving block 1 43 is attached to the vertical section of the inner wall of the L-shaped connecting tube 42, while the circular moving block 2 443 is attached to the horizontal section of the inner wall of the L-shaped connecting tube 42. When the circular moving block 1 43 slides downward along the vertical section of the inner wall of the L-shaped connecting tube 42, it will squeeze the gas inside the L-shaped connecting tube 42, and these gases will then push the circular moving block 2 443 to slide along the horizontal section of the inner wall of the L-shaped connecting tube 42. In this process, the moving rod 441 will be driven, thereby causing the contact plate 442 to clamp the side of the explosion-proof box. On the contrary, when the circular moving block 1 43 slides upward along the vertical section of the inner wall of the L-shaped connecting tube 42, the circular moving block 2 443 will return to its initial position under the elastic force of the spring 444, so that the contact plate 442 will release the contact with the side of the explosion-proof box, realizing flexible switching between clamping and release.

[0044] Example 2: Reference Figure 3 , Figure 6 and Figure 8, an explosion-proof box water pressure test device, comprising an L-shaped frame 1, and a concave bracket 2 fixed on the L-shaped frame 1, a concave bearing plate 3 that moves longitudinally is provided above the bottom wall of the L-shaped frame 1, a pressing plate 4 that is located below the top wall of the concave bracket 2 and is lifted and lowered is provided above the concave bearing plate 3, a pair of vertical rods 41 are fixedly connected to the bottom of the pressing plate 4, an L-shaped connecting pipe 42 is sleeved on the surface of the vertical rod 41, an L-shaped fixing frame 6 is fixedly connected to the L-shaped connecting pipe 42, and the L-shaped fixing frame 6 is fixedly connected to the side wall of the concave bracket 2, one end of the vertical rod 41 located inside the L-shaped connecting pipe 42 is fixedly connected to a circular moving block 43 that fits the inner wall of the L-shaped connecting pipe 42, and the other end of the L-shaped connecting pipe 42 is provided with a resisting portion 44, when the pressing plate 4 When descending, it can be used to press the top of the explosion-proof box placed on the concave supporting plate 3, and at the same time, drive the two abutting parts 44 to respectively abut on the corresponding two sides of the explosion-proof box. When the pressing plate 4 rises and leaves the top of the explosion-proof box, the two abutting parts 44 are not in contact with the corresponding two sides of the explosion-proof box. Different from the above-mentioned embodiment 1, an air collecting chamber 45 is provided inside the pressing plate 4, and filter holes 46 are evenly distributed between the bottom wall of the air collecting chamber 45 and the bottom of the pressing plate 4. When the circular moving block 443 slides along the inner wall of the L-shaped connecting tube 42, an air guide part 47 is connected between the L-shaped connecting tube 42 and the air collecting chamber 45. The air guide part 47 is a connecting hose, one end of which is connected to the surface of the L-shaped connecting tube 42, and the other end thereof is connected to the side wall of the air collecting chamber 45.

[0045] By adopting such a technical solution, when the circular moving block 1 43 slides downward along the vertical section of the inner wall of the L-shaped connecting tube 42, the gas inside the L-shaped connecting tube 42 will be squeezed, and the gas will then push the circular moving block 2 443 to slide along the horizontal section of the inner wall of the L-shaped connecting tube 42. In this process, the internal gas of the L-shaped connecting tube 42 located in the horizontal section will be transported to the gas collecting chamber 45 through the air guide part 47, and finally the gas will be ejected from the filter mesh hole 46. This design enables the top of the explosion-proof box to be blown at the moment when the pressure plate 4 contacts the top of the explosion-proof box. This blowing action can not only effectively blow away the dust and impurities attached to the top of the explosion-proof box, but also improve the contact effect between the pressure plate 4 and the top of the explosion-proof box.

[0046] The present invention also provides a method for testing the water pressure of an explosion-proof box, comprising:

[0047] Step S1, placing the explosion-proof box on the top of the concave carrying plate 3, and starting the longitudinal moving mechanism of the concave carrying plate 3 to smoothly transport the explosion-proof box to the bottom of the pressing plate 4;

[0048] Step S2, start the lifting mechanism of the pressing plate 4, so that the pressing plate 4 starts to descend. During the descent of the pressing plate 4, the vertical rod 41 drives the circular moving block 1 43 to slide along the inner wall of the L-shaped connecting tube 42, compressing the gas inside the L-shaped connecting tube 42 to push the abutment 44 to move toward the side of the explosion-proof box until the abutment 44 is in close contact with both sides of the explosion-proof box, thereby achieving multi-directional clamping;

[0049] Step S3, after the explosion-proof box is stably clamped, connect the external water pressure device to the connecting pipe on the surface of the explosion-proof box. When ensuring that the connection is firm and there is no leakage, turn on the switch of the water pressure device to start the water pressure test on the explosion-proof box. According to the test requirements, adjust the size and duration of the water pressure, and observe the deformation or leakage of the explosion-proof box under the action of the water pressure.

[0050] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which are equivalent modifications and improvements made to the above embodiments based on the essential technology of the present invention, and all of them belong to the protection scope of the present invention.

Claims

1. An explosion-proof box water pressure test device, characterized in that: include: L-shaped frame (1); as well as A concave bracket (2) is fixed on the L-shaped frame (1), a concave bearing plate (3) which moves longitudinally is provided above the bottom wall of the L-shaped frame (1), a pressing plate (4) which is located below the top wall of the concave bracket (2) and is lifted and lowered is provided above the concave bearing plate (3), a pair of vertical rods (41) are fixedly connected to the bottom of the pressing plate (4), an L-shaped connecting tube (42) is sleeved on the surface of the vertical rod (41), one end of the vertical rod (41) located inside the L-shaped connecting tube (42) is fixedly connected to a circular moving block (43) which is in contact with the inner wall of the L-shaped connecting tube (42), and a resisting portion (44) is provided at the other end of the L-shaped connecting tube (42); When the pressing plate (4) descends, it can be used to press the top of the explosion-proof box placed on the concave supporting plate (3), and at the same time, drive the two abutting parts (44) to respectively abut on the corresponding two sides of the explosion-proof box; When the pressing plate (4) rises and leaves the top of the explosion-proof box, the two abutting portions (44) are not in contact with the corresponding two sides of the explosion-proof box.

2. The explosion-proof box water pressure test device according to claim 1, characterized in that: Four L-shaped blocks (31) are connected to the top of the concave bearing plate (3), and the area formed between the four L-shaped blocks (31) can be used to position the explosion-proof box when it is placed on the top of the concave bearing plate (3).

3. The explosion-proof box water pressure test device according to claim 1, characterized in that: A pair of support rods (32) are slidably connected to the concave bearing plate (3), one end of the support rod (32) is fixedly connected to the side wall of the L-shaped frame (1), a mounting block (33) is fixedly connected between the other end of the support rod (32) and the bottom wall of the L-shaped frame (1), a driving part (34) is installed on the L-shaped frame (1), and an output end of the driving part (34) is fixedly connected to the corresponding surface of the concave bearing plate (3).

4. The explosion-proof box water pressure test device according to claim 1, characterized in that: A plurality of concave grooves (35) are provided at the bottom of the concave bearing plate (3), a rotating shaft (36) is rotatably connected between the inner walls of the concave grooves (35), and a moving wheel (37) that fits the bottom wall of the L-shaped frame (1) is fixedly connected to the rotating shaft (36).

5. The explosion-proof box water pressure test device according to claim 1, characterized in that: A second driving part (5) is installed on the concave bracket (2), and an output end of the second driving part (5) is fixedly connected to the top of the pressing plate (4).

6. The explosion-proof box water pressure test device according to claim 1, characterized in that: An L-shaped fixing frame (6) is fixedly connected to the L-shaped connecting pipe (42), and the L-shaped fixing frame (6) is fixedly connected to the side wall of the concave bracket (2).

7. The explosion-proof box water pressure test device according to claim 1, characterized in that: The abutment portion (44) comprises a moving rod (441) slidably connected to the L-shaped connecting tube (42); one end of the moving rod (441) is fixedly connected to a corresponding abutment plate (442) located outside the L-shaped connecting tube (42); the other end of the moving rod (441) is fixedly connected to a circular moving block 2 (443) that fits the inner wall of the L-shaped connecting tube (42); a spring (444) is sleeved on the moving rod (441); and the spring (444) is fixedly connected between the circular moving block 2 (443) and the side wall of the L-shaped connecting tube (42).

8. The explosion-proof box water pressure test device according to claim 7, characterized in that: An air collecting chamber (45) is provided inside the pressing plate (4), and filter holes (46) are evenly distributed between the bottom wall of the air collecting chamber (45) and the bottom of the pressing plate (4). When the circular moving block 2 (443) slides along the inner wall of the L-shaped connecting tube (42), an air guide portion (47) is connected between the L-shaped connecting tube (42) and the air collecting chamber (45).

9. The explosion-proof box water pressure test device according to claim 8, characterized in that: The air guide portion (47) is a connecting hose, one end of which is connected to the surface of the L-shaped connecting tube (42), and the other end of which is connected to the side wall of the air collecting cavity (45).

10. A method for testing the water pressure of an explosion-proof box, applied to the device for testing the water pressure of an explosion-proof box as claimed in claim 1, characterized in that: include: Step S1, placing the explosion-proof box on the top of the concave carrying plate (3), and starting the longitudinal moving mechanism of the concave carrying plate (3) to smoothly transport the explosion-proof box to the bottom of the pressing plate (4); Step S2, start the lifting mechanism of the pressure plate (4), so that the pressure plate (4) begins to descend. During the descent of the pressure plate (4), the vertical rod (41) drives the circular moving block 1 (43) to slide along the inner wall of the L-shaped connecting tube (42), compressing the gas inside the L-shaped connecting tube (42) to push the abutment part (44) to move toward the side of the explosion-proof box until the abutment part (44) is in close contact with both sides of the explosion-proof box, thereby achieving multi-directional clamping; Step S3, after the explosion-proof box is stably clamped, connect the external water pressure device to the connecting pipe on the surface of the explosion-proof box. When ensuring that the connection is firm and there is no leakage, turn on the switch of the water pressure device to start the water pressure test on the explosion-proof box. According to the test requirements, adjust the size and duration of the water pressure, and observe the deformation or leakage of the explosion-proof box under the action of the water pressure.

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