A kind of strength performance detection equipment for explosion-proof distribution box

Abstract

The present application relates to the technical field of material detection, and particularly provides a strength performance detection equipment for an explosion-proof distribution box, comprising a detection platform, a connecting assembly and a booster pump. The connecting assembly is vertically arranged at the bottom end of the explosion-proof distribution box and comprises a shell and a tightening piece. The shell is provided with a first communication pipeline, and the tightening piece is provided with a second communication pipeline. The booster pump is connected with the first communication pipeline. The tightening piece is configured to move upward to abut against the top wall of the explosion-proof distribution box when the explosion-proof distribution box starts to be filled with liquid. The tightening piece is further configured to move downward to reset after the explosion-proof distribution box is filled with liquid, and to close the second communication pipeline after resetting. According to the present application, the tightening piece can move to abut against the top wall of the explosion-proof distribution box, so that the air in the explosion-proof distribution box is squeezed to the top by the liquid and then discharged through the second communication pipeline, thereby improving the air discharge rate in the explosion-proof distribution box and the detection accuracy.

Description

Technical Field

[0001] This invention relates to the field of materials testing technology, and in particular to a strength performance testing device for explosion-proof distribution boxes. Background Technology

[0002] The strength performance testing of explosion-proof distribution boxes involves using hydraulic pressure to test the pressure resistance and sealing performance of their casing. This test simulates the pressure impact under explosive conditions to ensure that the box can effectively block the propagation of flames and pressure in the event of an internal explosion. The test typically uses a liquid as the medium; liquid is injected into the distribution box, pressurized to the standard specified value, maintained for a certain period, and then the box is checked for leaks or deformation.

[0003] Existing testing equipment lacks an exhaust system, or the exhaust system is poorly configured. During the pressurization and pressure holding process, a certain amount of air remains inside the chamber, turning the actual test into a mixed "water pressure and air pressure" test. This not only makes it difficult to determine the test results but also poses safety risks during the testing process. Summary of the Invention

[0004] The purpose of this invention is to improve detection accuracy.

[0005] Specifically, the present invention provides a strength performance testing device for an explosion-proof distribution box, comprising: a testing platform for placing the explosion-proof distribution box to be tested; a connecting assembly vertically disposed at the bottom end of the explosion-proof distribution box, the connecting assembly including a housing fixed relative to the explosion-proof distribution box and a clamping member movable vertically to abut against the top wall of the explosion-proof distribution box, the housing being coaxially sleeved on the outer periphery of the clamping member; a first connecting pipe on the housing connecting the interior of the explosion-proof distribution box to the outside, and a second connecting pipe on the clamping member connecting the interior of the explosion-proof distribution box to the outside; a booster pump connected to the first connecting pipe and injecting liquid into the explosion-proof distribution box through the first connecting pipe to test the strength of the explosion-proof distribution box; the clamping member being configured to move upward to abut against the top wall of the explosion-proof distribution box when liquid begins to be injected into the explosion-proof distribution box; the clamping member being further configured to move downward to reset after the explosion-proof distribution box is filled with liquid, and to close the second connecting pipe after resetting.

[0006] Furthermore, a first annular cavity is formed between the outer shell and the clamping member. The bottom of the first annular cavity is connected to the booster pump, and the top is connected to the first connecting pipe. The clamping member is provided with an annular groove facing downwards, and the annular groove communicates with the first annular cavity. A raised first limiting ring is provided on the side wall of the clamping member. A first sleeve that can move vertically is provided between the clamping member and the outer shell. A raised second limiting ring is provided on the outer wall of the first sleeve. A tension spring is sleeved on the clamping member. The top end of the tension spring is connected to the top wall of the first sleeve, and the bottom end of the tension spring is connected to the first limiting ring. The first connecting pipe includes a second annular cavity, a plurality of first through holes communicating with the second annular cavity, and a plurality of micro-holes communicating with the second annular cavity; wherein, the plurality of first through holes are located above the second annular cavity, and the plurality of micro-holes are located below the second annular cavity; a plurality of second through holes are provided circumferentially on the inner wall of the second annular cavity, and a plurality of third through holes are provided circumferentially on the side wall of the first sleeve; the first sleeve is configured such that after the clamping member moves to abut against the top wall of the explosion-proof distribution box, it moves upward to make the third through holes and second through holes partially overlap.

[0007] Furthermore, the first through hole is spirally arranged in the vertical direction.

[0008] Furthermore, the second connecting pipe is configured as a Tesla valve, and the second connecting pipe is configured to provide greater resistance when the liquid flows from top to bottom.

[0009] Furthermore, the clamping member is hollow inside, and a vertical positioning rod is fixedly installed at the center of the clamping member. A second sleeve that can move vertically is sleeved on the positioning rod, and a compression spring is provided between the top wall of the second sleeve and the top surface of the positioning rod. A second connecting pipe is formed between the outer wall of the second sleeve and the inner wall of the clamping member. Multiple top blocks are spaced apart on the top surface of the clamping member, and a limiting block that can abut against the top surface of the second sleeve is provided on the top surface of the clamping member. A baffle is provided at the bottom end of the second sleeve, and a third limiting ring is provided on the inner wall of the clamping member. The second sleeve is configured such that after the clamping member moves down and resets, it continues to move down until the baffle and the limiting ring abut against each other to close the second connecting pipe.

[0010] Furthermore, a sealing gasket is provided on the testing platform, which is opposite to the side wall of the explosion-proof distribution box; a connection hole is provided on the testing platform, which is located in the middle area of ​​the sealing gasket; the connection component is installed on the testing platform through the connection hole; the explosion-proof distribution box is placed horizontally on the sealing gasket, and the bottom surface of the explosion-proof distribution box is open; a hydraulic component is provided above the explosion-proof distribution box to press the explosion-proof distribution box tightly against the sealing gasket.

[0011] Furthermore, the housing and the connecting hole are threaded together, and the top surface of the housing is flush with the top surface of the testing platform.

[0012] Furthermore, the hydraulic assembly includes a telescopic cylinder and a pressure plate connected to the telescopic cylinder, the pressure plate being used to abut against the top surface of the explosion-proof distribution box.

[0013] Furthermore, the explosion-proof distribution box is placed vertically on the testing platform, and a vertically downward connecting pipe is installed on the bottom wall of the explosion-proof distribution box; the area on the testing platform opposite to the connecting pipe is hollow, and the connecting component passes through the testing platform and connects to the connecting pipe.

[0014] Furthermore, the strength performance testing equipment for explosion-proof distribution boxes also includes: a drying device connected to the second connecting pipeline, used to deliver high-pressure drying gas into the explosion-proof distribution box after the liquid inside the box is discharged.

[0015] The beneficial effects of this invention are:

[0016] The present invention provides a strength performance testing device for explosion-proof distribution boxes. By installing a connecting assembly at the bottom of the explosion-proof distribution box, and configuring a clamping member within the connecting assembly to move upwards and abut against the top wall of the explosion-proof distribution box when liquid is initially injected into the box, a second connecting pipe on the clamping member connects to the top of the box. During the liquid injection process, air within the box is compressed to the top and discharged through the second connecting pipe on the clamping member, thereby increasing the air discharge rate and improving the accuracy of hydraulic strength testing of the explosion-proof distribution box, while also reducing safety risks during the testing process. Attached Figure Description

[0017] The following sections will describe some specific embodiments of the invention in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or components. In the drawings:

[0018] Figure 1 This is a structural schematic diagram of a strength performance testing device for an explosion-proof distribution box according to an embodiment of the present invention;

[0019] Figure 2 This is an exploded view of a strength performance testing device for an explosion-proof distribution box according to an embodiment of the present invention;

[0020] Figure 3 This is a structural schematic diagram of a strength performance testing device for an explosion-proof distribution box according to an embodiment of the present invention from another angle;

[0021] Figure 4 It is along Figure 3 A schematic cross-sectional view taken by section line AA; in which the wiring box has not yet been filled with liquid;

[0022] Figure 5 yes Figure 4A schematic enlarged view of region B in the middle;

[0023] Figure 6 yes Figure 5 The diagram shows the structure of the connecting components in the explosion-proof distribution box before it is filled with water.

[0024] Figure 7 yes Figure 5 The diagram shows the structure of the connecting components when the explosion-proof distribution box is filled with water.

[0025] Figure 8 This is a schematic diagram of the structure of a connection component according to an embodiment of the present invention;

[0026] Figure 9 This is an exploded view of a connection component according to an embodiment of the present invention;

[0027] Figure 10 This is an assembly diagram of an explosion-proof distribution box and connecting components according to another embodiment of the present invention.

[0028] in:

[0029] 01. Explosion-proof distribution box; 02. Connecting pipe; 100. Testing platform; 110. Sealing gasket; 120. Support plate; 130. Connecting hole; 140. Bracket; 200. Connecting assembly; 210. Housing; 211. First connecting pipe; 2111. Second annular cavity; 2112. First through hole; 2113. Micropore; 212. First annular cavity; 213. End cap; 214. Sealing ring; 215. Connecting port; 216. Second through hole; 220. Tightening component; 221. Second connecting pipe ; 222, Annular groove; 223, First limiting ring; 224, Positioning rod; 225, Top block; 226, Limiting block; 227, Third limiting ring; 228, Locking block; 230, First sleeve; 231, Second limiting ring; 232, Tension spring; 233, Third through hole; 234, Fourth limiting ring; 240, Second sleeve; 241, Compression spring; 242, Baffle plate; 243, Sealing ring; 300, Booster pump; 400, Hydraulic assembly; 410, Telescopic cylinder; 420, Pressure plate; 500, Drying device. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0031] The terms "first" and "second" used herein are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature, that is, include one or more of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. When a feature "includes or contains" one or more of the features it encompasses, unless otherwise specifically stated, this indicates that other features are not excluded and may be further included.

[0032] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art should be able to understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0033] The following reference Figures 1 to 10 This invention describes a strength performance testing device for explosion-proof distribution boxes.

[0034] This embodiment provides a strength performance testing device for explosion-proof distribution boxes. The strength performance testing device for explosion-proof distribution boxes generally includes a testing platform 100, a connecting assembly 200, and a booster pump 300.

[0035] The testing platform 100 is used to place the explosion-proof distribution box 01 to be tested. A connecting assembly 200 is vertically mounted at the bottom of the explosion-proof distribution box 01. The connecting assembly 200 includes a housing 210 fixed relative to the explosion-proof distribution box 01 and a clamping member 220 movable vertically to abut against the top wall of the explosion-proof distribution box 01. The housing 210 is coaxially sleeved on the outer periphery of the clamping member 220. A first connecting pipe 211 is provided on the housing 210, connecting the interior of the explosion-proof distribution box 01 to the outside. A second connecting pipe 221 is provided on the clamping member 220, connecting the interior of the explosion-proof distribution box 01 to the outside. A booster pump 300 is connected to the first connecting pipe 211 and injects liquid into the explosion-proof distribution box 01 through the first connecting pipe 211 to test the strength of the explosion-proof distribution box 01. The clamping member 220 is configured to move upward to abut against the top wall of the explosion-proof distribution box 01 when liquid begins to be injected into the explosion-proof distribution box 01. The clamping member 220 is also configured to move downward to reset after the explosion-proof distribution box 01 is filled with liquid, and to close the second connecting pipe 221 after resetting.

[0036] like Figures 3-4 As shown, the booster pump 300 is connected to the outer casing 210 via the connecting port 215 at the bottom of the outer casing 210, and then injects liquid into the explosion-proof distribution box 01 through the first connecting pipe 211. Air in the explosion-proof distribution box 01 is discharged through the second connecting pipe 221. After the second connecting pipe 221 is closed, the booster pump 300 continues to inject liquid into the explosion-proof distribution box 01 to adjust the hydraulic pressure in the explosion-proof distribution box 01, thereby completing the strength test of the explosion-proof distribution box 01. During the process of the booster pump 300 injecting liquid into the explosion-proof distribution box 01, the connecting pipe 02 and all other pipe openings of the explosion-proof distribution box 01 can be sealed with plugs.

[0037] In this embodiment, a connecting assembly 200 is installed at the bottom of the explosion-proof distribution box 01. The clamping member 220 within the connecting assembly 200 is configured such that, when liquid is initially injected into the explosion-proof distribution box 01, it moves upward to abut against the top wall of the explosion-proof distribution box 01, thereby connecting the second connecting pipe 221 on the clamping member 220 to the top of the explosion-proof distribution box 01. During the process of the booster pump 300 injecting liquid into the explosion-proof distribution box 01 through the first connecting pipe 211, air in the explosion-proof distribution box 01 is compressed by the liquid to the top of the explosion-proof distribution box 01 and then discharged through the second connecting pipe 221 on the clamping member 220. This improves the air discharge rate within the explosion-proof distribution box 01, thereby increasing the accuracy of hydraulic strength testing of the explosion-proof distribution box 01 and reducing safety risks during the testing process.

[0038] Furthermore, in this embodiment, the outer casing 210 of the connecting assembly 200 is fixed relative to the explosion-proof distribution box 01, while the clamping member 220 can move vertically. That is, the distance the clamping member 220 extends beyond the outer casing 210 is adjustable, allowing the connecting assembly 200 to adapt to explosion-proof distribution boxes 01 of different heights and sizes, thereby increasing the applicability of the connecting assembly 200 and improving the practicality of the equipment. The liquid injected into the explosion-proof distribution box 01 is generally water, which is not only readily available but also inexpensive.

[0039] like Figure 5 As shown, an end cap 213 can be provided at the bottom of the outer casing 210. The end cap 213 and the outer casing 210 can be connected by bolts. The clamping member 220 passes through the end cap 213 and moves in the vertical direction. A sealing ring 214 can be provided between the clamping member 220 and the end cap 213.

[0040] A first annular cavity 212 is formed between the outer casing 210 and the clamping member 220. The bottom of the first annular cavity 212 is connected to the booster pump 300, and the top is connected to the first connecting pipe 211. The clamping member 220 is provided with an annular groove 222 with its opening facing downward, and the annular groove 222 communicates with the first annular cavity 212. A protruding first limiting ring 223 is provided on the side wall of the clamping member 220.

[0041] like Figure 5 As shown, the top of the outer casing 210 is provided with an annular protrusion that bulges inward, and the first connecting pipe 211 is vertically arranged in the annular protrusion. The diameter of the first connecting pipe 211 is smaller than the connection port between the booster pump 300 and the outer casing 210 (that is, the flow rate of the first connecting pipe 211 is smaller than the flow rate of the booster pump 300).

[0042] In some embodiments, the sidewall of the clamping member 220 can directly abut against the annular protrusion of the housing 210. The booster pump 300 injects liquid into the first annular cavity 212. After the liquid fills the first annular cavity 212 and the annular groove 222, it flows into the explosion-proof distribution box 01 through the first connecting pipe 211. As the booster pump 300 continuously injects liquid into the first annular cavity 212, the hydraulic pressure in the first annular cavity 212 and the annular groove 222 increases, thereby pushing the clamping member 220 upwards until the clamping member 220 abuts against the top wall of the explosion-proof distribution box 01.

[0043] In other embodiments, a first sleeve 230 movable in a vertical direction is provided between the clamping member 220 and the outer shell 210, and a protruding second limiting ring 231 is provided at the top end of the outer wall of the first sleeve 230. A tension spring 232 is sleeved on the clamping member 220, with the top end of the tension spring 232 abutting against the top wall of the first sleeve 230 and the bottom end of the tension spring 232 abutting against the first limiting ring 223. The first connecting pipe 211 includes a second annular cavity 2111, a plurality of first through holes 2112 communicating with the second annular cavity 2111, and a plurality of micro holes 2113 communicating with the second annular cavity 2111. Among them, the plurality of first through holes 2112 are located above the second annular cavity 2111, and the plurality of micro holes 2113 are located below the second annular cavity 2111. The inner wall of the second annular cavity 2111 is provided with a plurality of second through holes 216 along the circumferential direction, and the side wall of the first sleeve 230 is provided with a plurality of third through holes 233 along the circumferential direction. The first sleeve 230 is configured such that after the clamping member 220 moves to abut against the top wall of the explosion-proof distribution box 01, it moves upward to make the third through holes 233 partially overlap with the second through holes 216.

[0044] like Figure 5As shown, the explosion-proof distribution box 01 has not yet been filled with liquid, and the clamping member 220 has not yet extended upwards out of the outer casing 210. The booster pump 300 delivers liquid to the first annular cavity 212. After the liquid fills the first annular cavity 212 and the annular groove 222, it enters the second annular cavity 2111 through the micro-hole 2113, and then enters the explosion-proof distribution box 01 through the first through-hole 2112. The micro-hole 2113 increases the hydraulic pressure in the first annular cavity 212 and the annular groove 222, thereby pushing the clamping member 220 upwards. As the clamping member 220 moves upwards, the tension of the tension spring 232 gradually decreases until the hydraulic pressure on the first sleeve 230 from the first annular cavity 212 is less than the sum of the tension of the tension spring 232 and its own weight. Then, the clamping member 220 drives the first sleeve 230 to move upwards synchronously until the clamping member 220 abuts against the top wall of the explosion-proof distribution box 01. After the clamping member 220 abuts against the top wall of the explosion-proof distribution box 01, under the hydraulic action in the first annular cavity 212, the first sleeve 230 continues to move upward until the second through hole 216 and the third through hole 233 partially overlap. In some preferred embodiments, the cross-sectional area of ​​the second through hole 216 is larger than the cross-sectional area of ​​the micro hole 2113, and the sum of the cross-sectional areas of the multiple first through holes 2112 is greater than the sum of the cross-sectional areas of the multiple micro holes 2113 and the multiple second through holes 216. A fourth limiting ring 234 may also be provided at the bottom end of the side wall of the first sleeve 230.

[0045] like Figure 6 As shown, after the first sleeve 230 moves upward until the second through hole 216 and the third through hole 233 partially overlap, the liquid in the first annular cavity 212 enters the second annular cavity 2111 through the microhole 2113, and also enters the second annular cavity 2111 through the second through hole 216 and the third through hole 233, thus reducing the hydraulic pressure in the first annular cavity 212. As the overlapping area of ​​the second through hole 216 and the third through hole 233 increases, the hydraulic pressure in the first annular cavity 212 decreases accordingly. When the hydraulic pressure on the first sleeve 230 from the first annular cavity 212 decreases to a point where it balances the tension of the tension spring 232 and its own weight, the first sleeve 230 stops moving upward.

[0046] During the liquid injection process of the explosion-proof distribution box 01, as the hydraulic pressure of the liquid from the explosion-proof distribution box 01 changes, the hydraulic pressure from the first annular cavity 212 on the first sleeve 230 becomes less than the sum of the tension of the spring 232, its own weight, and the hydraulic pressure from the explosion-proof distribution box 01. Then, the first sleeve 230 moves downward, causing the hydraulic pressure in the first annular cavity 212 to increase until the hydraulic pressure from the first annular cavity 212 on the first sleeve 230 reaches equilibrium with the sum of the tension of the spring 232, its own weight, and the hydraulic pressure from the explosion-proof distribution box 01. At this point, the first sleeve 230 stops moving downward.

[0047] In this embodiment, by setting a second through hole 216 and a third through hole 233, the first sleeve 230 can automatically adjust its position according to the hydraulic pressure it receives. While ensuring that the hydraulic pressure in the first annular cavity 212 can push the clamping member 220 against the top wall of the explosion-proof distribution box 01, the flow rate of the first connecting pipe 211 is increased as much as possible, thereby improving the efficiency of injecting liquid into the explosion-proof distribution box 01 and improving the detection efficiency of the equipment.

[0048] The first through hole 2112 is spirally arranged in the vertical direction.

[0049] In this embodiment, the first through-hole 2112 is configured as a spiral shape, so that after the liquid flows into the explosion-proof distribution box 01 through the first through-hole 2112, a spiral water flow is formed. The water flow agitates the residual air in the explosion-proof distribution box 01, driving the air to the vicinity of the second connecting pipe 221, thereby improving the air discharge rate in the explosion-proof distribution box 01 and thus improving the detection accuracy.

[0050] The second connecting pipe 221 is configured as a Tesla valve and is configured to provide greater resistance when the liquid flows from top to bottom.

[0051] In this embodiment, the second connecting pipe 221 is configured as a Tesla valve, which makes the resistance encountered by the liquid flowing from top to bottom through the second connecting pipe 221 greater. Thus, after the explosion-proof distribution box 01 is filled with liquid (i.e. after the fixed air in the explosion-proof distribution box 01 is discharged), the thrust of the liquid flowing downward through the second connecting pipe 221 pushes the clamping member 220 to move downward, so that the clamping member 220 automatically resets.

[0052] During the downward movement of the clamping member 220, the tension spring 232 is pulled, causing its tension to continuously increase. Once the tension of the tension spring 232 and the weight of the first sleeve 230 exceed the upward hydraulic pressure acting on the first sleeve 230, the first sleeve 230 moves downward under the influence of the clamping member 220. After the first sleeve 230 moves downward until the second through hole 216 and the third through hole 233 are completely misaligned, the clamping member 220 drives the first sleeve 230 to move downward synchronously. Then, the first sleeve 230 moves until the second limiting ring 231 abuts against the top surface of the outer casing 210, and the clamping member 220 continues to move downward until it completes its reset.

[0053] In some embodiments, the clamping member 220 is hollow inside, and a vertical positioning rod 224 is fixedly provided at the center of the clamping member 220. A second sleeve 240 that can move in the vertical direction is sleeved on the positioning rod 224, and a compression spring 241 is provided between the top wall of the second sleeve 240 and the top surface of the positioning rod 224. A second connecting pipe 221 is formed between the outer wall of the second sleeve 240 and the inner wall of the clamping member 220. A plurality of top blocks 225 are provided at intervals on the top surface of the clamping member 220, and a limiting block 226 that can abut against the top surface of the second sleeve 240 is provided on the top surface of the clamping member 220. The bottom end of the second sleeve 240 is provided with a baffle 242, and the inner wall of the clamping member 220 is provided with a third limiting ring 227. The second sleeve 240 is configured such that after the clamping member 220 moves down to reset, it continues to move down until the baffle 242 and the third limiting ring 227 abut together to close the second connecting pipe 221.

[0054] like Figure 7 As shown, a locking block 228 is provided on the clamping member 220. When the clamping member 220 moves down to make the locking block 228 abut against the end wall of the outer shell 210, the top surface of the clamping member 220 is flush with the top surface of the outer shell 210. The second connecting pipe 221 can be set as an annular pipe arranged around the axis of the second sleeve 240, and its cross-section is Tesla valve shaped. The flow rate of the second connecting pipe 221 is less than the flow rate of the micro-orifice 2113. After the explosion-proof distribution box 01 is filled with liquid, the hydraulic pressure in the explosion-proof distribution box 01 gradually increases as the liquid continues to be injected.

[0055] In this embodiment, a movable second sleeve 240 is provided in the clamping member 220. This allows the second sleeve 240 and the clamping member 220 to cooperate in forming a second connecting pipe 221. Simultaneously, after the clamping member 220 has moved down to its reset position, the second sleeve 240 continues to move downwards, causing the baffle 242 to abut against the third limiting ring 227 on the inner wall of the clamping member 220, thereby sealing the second connecting pipe 221. Utilizing hydraulic pressure to achieve automatic sealing of the second connecting pipe 221 is not only simple in structure but also convenient to operate, ensuring detection accuracy.

[0056] In some preferred embodiments, a sealing ring 243 may be provided at the bottom of the chassis to further improve the sealing effect.

[0057] In other embodiments, the second sleeve 240 may be fixed relative to the clamping member 220, an electrically controlled valve may be provided in the second connecting pipe 221, and a triggering device may be provided on the clamping member 220. After the clamping member 220 moves down and resets, the triggering device sends an electrical control signal to control the electrically controlled valve to close the second connecting pipe 221.

[0058] In some embodiments, a sealing gasket 110 is provided on the testing platform 100, and the sealing gasket 110 is opposite to the side wall of the explosion-proof distribution box 01. A connection hole 130 is provided on the testing platform 100, located in the middle region of the sealing gasket 110. A connecting assembly 200 is installed onto the testing platform 100 through the connection hole 130. The explosion-proof distribution box 01 is placed horizontally on the sealing gasket 110, and the bottom surface of the explosion-proof distribution box 01 is open. A hydraulic assembly 400 is provided above the explosion-proof distribution box 01 to press the explosion-proof distribution box 01 tightly against the sealing gasket 110. A bracket 140 is provided on the testing platform 100 for mounting the hydraulic assembly 400.

[0059] In this embodiment, the explosion-proof distribution box 01 to be tested is an open type. The open end face of the explosion-proof distribution box 01 is pressed against the testing platform 100 by the hydraulic component 400, so that the explosion-proof distribution box 01 and the testing platform 100 cooperate to form a sealed chamber, thereby performing strength testing on the explosion-proof distribution box 01.

[0060] The housing 210 is threadedly connected to the connecting hole 130, and the top surface of the housing 210 is flush with the top surface of the detection platform 100.

[0061] In this embodiment, the connecting hole 130 is set as a threaded hole, so that the outer shell 210 and the connecting hole 130 are threadedly connected, which not only makes the connection tight, but also makes the installation convenient.

[0062] The hydraulic assembly 400 includes a telescopic cylinder 410 and a pressure plate 420 connected to the telescopic cylinder 410. The pressure plate 420 is used to abut against the top surface of the explosion-proof distribution box 01.

[0063] In this embodiment, the hydraulic component 400 is used to press the pressure plate 420 against the explosion-proof distribution box 01 and make it adhere tightly to the sealing gasket 110, thereby improving the sealing effect of the explosion-proof distribution box 01 and ensuring the detection accuracy.

[0064] In other embodiments, the explosion-proof distribution box 01 is placed vertically on the testing platform 100, and a vertically downward connecting pipe 02 is provided on the bottom wall of the explosion-proof distribution box 01. The area on the testing platform 100 opposite to the connecting pipe 02 is hollow, and the connecting component 200 passes through the testing platform 100 and is connected to the connecting pipe 02.

[0065] In this embodiment, the explosion-proof distribution box 01 is covered and is placed vertically on the testing platform 100. The connecting pipe 02 of the explosion-proof distribution box 01 passes through the testing platform 100 and is connected to the connecting component 200, thereby performing strength testing on the explosion-proof distribution box 01.

[0066] In some embodiments, the connecting component 200 can be directly threaded to the connecting pipe 02 of the explosion-proof distribution box 01. In other embodiments, the connecting component 200 can be connected to the connecting pipe 02 via a connector.

[0067] In some preferred embodiments, the top surface of the testing platform 100 can be configured as a removable support plate 120. When testing an open-top explosion-proof distribution box 01, the support plate 120 with connection holes 130 is installed on the testing platform 100, and a sealing gasket 110 is placed on the support plate 120. When testing a covered explosion-proof distribution box 01, a support plate 120 with a central hole, allowing a connecting pipe 02 to pass through, is installed on the testing platform 100. By disassembling and replacing the support plate 120, the strength performance testing equipment for the explosion-proof distribution box 01 can be applied to both open-top and covered explosion-proof distribution boxes 01, thereby improving the applicability and practicality of the equipment.

[0068] The strength performance testing equipment for the explosion-proof distribution box 01 may also generally include a drying device 500. The drying device 500 is connected to the second connecting pipe 221 and is used to supply high-pressure drying gas into the explosion-proof distribution box 01 after the liquid inside the box is drained.

[0069] In this embodiment, by setting up a drying device 500, after completing the strength test of the explosion-proof distribution box 01 and draining the liquid from the box, high-pressure drying gas is introduced into the box through the second connecting pipe 221, thereby forcing the liquid in the box to be completely drained through the first connecting pipe 211. This method is not only simple to operate but also fully functional. After entering the explosion-proof distribution box 01 through the second connecting pipe 221, the high-pressure drying gas enters the first annular cavity 212 through the first connecting pipe 211 and finally exits from the bottom of the outer shell 210, thereby completely draining the liquid from the explosion-proof distribution box 01 and the connecting assembly 200, and making the explosion-proof distribution box 01 and the connecting assembly 200 completely dry.

[0070] In some embodiments, the booster pump 300 can be connected to the housing 210 via a three-way valve, and the drying device 500 can be connected to the clamping member 220 via a three-way valve. In other embodiments, the booster pump 300 is detachably connected directly to the housing 210, and the drying device 500 is detachably connected directly to the clamping member 220. When the booster pump 300 injects liquid into the explosion-proof distribution box 01, the drying device 500 is disconnected from the clamping member 220, and the liquid flows out from below the clamping member 220 after passing through the second connecting pipe 221. After the booster pump 300 completes the test, it is disconnected from the housing 210, and the liquid in the explosion-proof distribution box 01 flows out from the bottom of the housing 210 through the first connecting pipe 211. High-pressure drying gas enters the explosion-proof distribution box 01 through the second connecting pipe 221 and then exits from the bottom of the housing 210 through the first connecting pipe 211.

[0071] In some embodiments, when high-pressure gas is introduced into the explosion-proof distribution box 01, the operator can manually push the clamping member 220 upward so that the clamping member 220 abuts against the top wall of the explosion-proof distribution box 01, so that the high-pressure drying gas flows downward from the top of the explosion-proof distribution box 01, thereby better discharging the liquid from the explosion-proof distribution box 01 and improving the drying effect.

[0072] The specific working process of the strength performance testing equipment for explosion-proof distribution box 01 provided by the present invention will be described in conjunction with the above embodiments:

[0073] The booster pump 300 injects liquid into the first annular cavity 212. After the first annular cavity 212 and the annular groove 222 are filled with liquid, it flows into the explosion-proof distribution box 01 through the first connecting pipe 211. The increased hydraulic pressure in the first annular cavity 212 and the annular groove 222 pushes the clamping member 220 upward. The upward movement of the clamping member 220 drives the first sleeve 230 upward until the clamping member 220 abuts against the top wall of the explosion-proof distribution box 01. After the clamping member 220 abuts against the top wall of the explosion-proof distribution box 01, the first sleeve 230 continues to move upward until the second through hole 216 and the third through hole 233 partially communicate, thereby increasing the speed at which the liquid is injected into the explosion-proof distribution box 01 through the first connecting pipe 211.

[0074] After the explosion-proof distribution box 01 is filled with liquid, the liquid is discharged downward through the second connecting pipe 221. The liquid flowing through the second connecting pipe 221 pushes the clamping member 220 downward to reset. During the downward movement of the clamping member 220, it also drives the first sleeve 230 downward to reset. After the clamping member 220 resets, the second sleeve 240 continues to move downward under the pressure of the liquid in the second connecting pipe 221, causing the baffle 242 and the third limiting ring 227 to abut, thereby sealing the second connecting pipe 221.

[0075] After the second connecting pipe 221 is closed, the explosion-proof distribution box 01 and the connecting assembly 200 form a sealed space. The booster pump 300 continues to inject liquid into the explosion-proof distribution box 01 to increase the pressure in the explosion-proof distribution box 01, thereby testing the strength of the explosion-proof distribution box 01.

[0076] After completing the strength test of the explosion-proof distribution box 01, the booster pump 300 stops working and connects the first annular cavity 212 to the outside. The liquid in the explosion-proof distribution box 01 flows through the first connecting pipe 211, passes through the first annular cavity 212, and then flows out from the bottom of the outer shell 210. After the liquid in the explosion-proof distribution box 01 is discharged, the drying device 500 connects with the clamping member 220 and starts, allowing high-temperature drying gas to be injected into the explosion-proof distribution box 01 through the second connecting pipe 221. After passing through the first connecting pipe 211 and the first annular cavity 212, the high-temperature drying gas is discharged from the bottom of the outer shell 210, thus drying the explosion-proof distribution box 01 and the connecting assembly 200.

[0077] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0078] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A strength performance testing device for explosion-proof distribution boxes, characterized in that, include: The testing platform is used to place the explosion-proof distribution box to be tested; A connecting assembly is vertically disposed at the bottom end of the explosion-proof distribution box. The connecting assembly includes a housing fixed relative to the explosion-proof distribution box and a clamping member movable in a vertical direction to abut against the top wall of the explosion-proof distribution box. The housing is coaxially sleeved on the outer periphery of the clamping member. A first connecting pipe is provided on the housing to connect the interior of the explosion-proof distribution box to the outside, and a second connecting pipe is provided on the clamping member to connect the interior of the explosion-proof distribution box to the outside. A booster pump is connected to the first connecting pipeline and injects liquid into the explosion-proof distribution box through the first connecting pipeline to test the strength of the explosion-proof distribution box; The clamping member is configured to move upward to abut against the top wall of the explosion-proof distribution box when liquid begins to be injected into the explosion-proof distribution box; the clamping member is also configured to move downward to reset after the explosion-proof distribution box is filled with liquid, and to close the second connecting pipe after resetting. A first annular cavity is formed between the outer shell and the clamping member. The bottom of the first annular cavity is connected to the booster pump, and the top is connected to the first connecting pipe. The clamping member is provided with an annular groove with the slot facing downward, and the annular groove communicates with the first annular cavity; a protruding first limiting ring is provided on the side wall of the clamping member; A first sleeve that can move vertically is provided between the clamping member and the outer shell. A second limiting ring with a protrusion is provided at the top end of the outer wall of the first sleeve. A tension spring is sleeved on the clamping member. The top end of the tension spring is connected to the top wall of the first sleeve, and the bottom end of the tension spring is connected to the first limiting ring. The first connecting pipe includes a second annular cavity, a plurality of first through holes communicating with the second annular cavity, and a plurality of micropores communicating with the second annular cavity; wherein, the plurality of first through holes are located above the second annular cavity, and the plurality of micropores are located below the second annular cavity; The inner wall of the second annular cavity is provided with a plurality of second through holes along the circumferential direction, and the side wall of the first sleeve is provided with a plurality of third through holes along the circumferential direction; the first sleeve is configured such that after the clamping member moves to abut against the top wall of the explosion-proof distribution box, it moves upward to make the third through holes and the second through holes partially overlap.

2. The strength performance testing equipment for explosion-proof distribution boxes according to claim 1, characterized in that, The first through hole is spirally arranged in the vertical direction.

3. The strength performance testing equipment for explosion-proof distribution boxes according to claim 1, characterized in that, The second connecting pipe is configured as a Tesla valve, and the second connecting pipe is configured to provide greater resistance when the liquid flows from top to bottom.

4. The strength performance testing equipment for explosion-proof distribution boxes according to claim 3, characterized in that, The clamping member is hollow inside, and a vertical positioning rod is fixedly installed at the center of the clamping member. A second sleeve that can move in the vertical direction is sleeved on the positioning rod, and a compression spring is provided between the top wall of the second sleeve and the top surface of the positioning rod. A second connecting pipe is formed between the outer wall of the second sleeve and the inner wall of the clamping member; a plurality of top blocks are spaced apart on the top surface of the clamping member, and a limiting block that can abut against the top surface of the second sleeve is provided on the top surface of the clamping member. The bottom end of the second sleeve is provided with a baffle plate, and the inner wall of the tightening member is provided with a third limiting ring. The second sleeve is configured such that after the tightening member moves down and resets, it continues to move down until the baffle plate and the third limiting ring abut against each other to close the second connecting pipe.

5. The strength performance testing equipment for explosion-proof distribution boxes according to claim 1, characterized in that, A sealing gasket is provided on the testing platform, and the sealing gasket is opposite to the side wall of the explosion-proof distribution box; The testing platform is provided with a connection hole, which is located in the middle area of ​​the sealing gasket; the connecting assembly is installed onto the testing platform through the connection hole. The explosion-proof distribution box is placed horizontally on the sealing gasket, and the bottom of the explosion-proof distribution box is open; a hydraulic component is provided above the explosion-proof distribution box to press the explosion-proof distribution box tightly against the sealing gasket.

6. The strength performance testing equipment for explosion-proof distribution boxes according to claim 5, characterized in that, The outer shell and the connecting hole are threaded together, and the top surface of the outer shell is flush with the top surface of the detection platform.

7. The strength performance testing equipment for explosion-proof distribution boxes according to claim 5, characterized in that, The hydraulic assembly includes a telescopic cylinder and a pressure plate connected to the telescopic cylinder, the pressure plate being used to abut against the top surface of the explosion-proof distribution box.

8. The strength performance testing equipment for explosion-proof distribution boxes according to claim 1, characterized in that, The explosion-proof distribution box is placed vertically on the testing platform, and a vertically downward connecting pipe is provided on the bottom wall of the explosion-proof distribution box; The area on the detection platform opposite to the connecting pipe is hollow, and the connecting component passes through the detection platform and connects to the connecting pipe.

9. The strength performance testing equipment for explosion-proof distribution boxes according to claim 1, characterized in that, Also includes: A drying device, connected to the second connecting pipeline, is used to deliver high-pressure drying gas into the explosion-proof distribution box after the liquid in the box is discharged.

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