A static pressure strength testing device

Abstract

This utility model discloses a static pressure strength testing device, the structure of which includes an assembly frame, a limiting device, a pressure plate, a connecting rod, a lifting mechanism, a weighbridge, a balance bar, and a control console. The assembly frame includes a supporting base plate, a supporting rod, and a top plate. The limiting device includes a slot, a limiting plate, a locking plate, a compression spring, a storage groove, a washer ring, an electromagnet, and a through hole. The limiting plate, which is locked with a pin, cooperates with the slot of the supporting rod to allow the limiting plate to be positioned at different heights. Combined with the electromagnet provided by the washer ring on the top of the limiting plate, and the locking plate structure that slides in the storage groove under the control of the compression spring, the electromagnet is attracted to the pressure plate while simultaneously attracting the compression spring to pull the locking plate into the storage groove. This allows the limiting plate to be adjusted in height as the pressure plate rises and falls. When the equipment is not in use, the pressure plate can be directly lowered to the ground for support, avoiding fatigue damage to the lifting structure or connections caused by prolonged suspension. At the same time, it also makes the maintenance of the equipment more convenient.

Description

Technical Field

[0001] This utility model belongs to the field of vehicle static pressure strength test bench, and specifically relates to a static pressure strength test detection device. Background Technology

[0002] After a vehicle is manufactured, especially a bus, its roof strength is often tested to ensure its safety and to determine if it meets national standards. This requires a vehicle static pressure strength test bench to perform static pressure tests. However, existing technologies often require limiting structures to restrict the minimum height of the pressure plate during use to ensure safety. Traditional vehicle static pressure strength test benches have relatively fixed limiting structures that are inconvenient to adjust. This results in the pressure plate being suspended for extended periods when not in use, which can easily lead to fatigue damage to the lifting structure and the connection structure of the pressure plate under prolonged stress. Furthermore, when the equipment needs maintenance or replacement, the height and weight of the pressure plate can make maintenance of the lifting structure, pressure plate, and their connection structure inconvenient. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] To overcome the shortcomings of existing technologies, a static pressure strength testing device is proposed. This addresses the issue that existing technologies often require limiting structures to restrict the minimum height of the test plate during use to ensure safety. Traditional vehicle static pressure strength test benches have relatively fixed limiting structures that are inconvenient to adjust. This results in the pressure plate being suspended for extended periods when not in use, which can easily lead to fatigue damage to the lifting structure and the connection structure of the pressure plate under prolonged stress. Furthermore, when the equipment needs maintenance or replacement, the height and weight of the pressure plate make maintenance of the lifting structure, pressure plate, and its connection structure inconvenient.

[0005] (II) Technical Solution

[0006] This utility model is achieved through the following technical solution: This utility model proposes a static pressure strength testing device, the structure of which includes an assembly frame, a limiting device, a pressure plate, a connecting rod, a lifting mechanism, a weighbridge, a balance bar, and a control console;

[0007] The assembly frame is in the shape of a U-shape with the opening facing downwards. There are three or more assembly frames, which are evenly arranged and fixedly connected by connecting rods. The pressure plate passes through the bottom of the three or more assembly frames in sequence and is fitted with the assembly frames with a clearance. A lifting mechanism is installed on the assembly frame located in the middle of the pressure plate. The lifting mechanism is used to drive the pressure plate to rise and fall. Balance bars are installed on the other assembly frames. The balance bars are used to limit the balance when the pressure plate rises and falls. The weighbridge is located directly below the pressure plate. The control console is used to connect and control the various electrical control components.

[0008] The assembly frame includes a support base plate, support rods, and a top plate. Two parallel support rods are fixed to the top of the support base plate, with a gap between the two support rods. There are two support base plates. The top plate is used to connect the tops of the support rods of the two support base plates. The assembly frame is equipped with a balance bar, which is arranged parallel between the two support rods.

[0009] The limiting device includes a slot, a limiting plate, a locking plate, a compression spring, a storage slot, a washer, an electromagnet, and a through hole. The slots are arranged from top to bottom on the support rod. A washer is fixed to the top of the limiting plate. A through hole is provided in the middle of the limiting plate and the locking plate for the balance bar to pass through. An electromagnet is fixed to the top of the washer. Storage slots are provided on both sides of the limiting plate for storing the locking plate. One end of the locking plate is fixedly connected to one end of the compression spring, and the other end of the compression spring is connected to the electromagnet. The compression spring is used to push the locking plate into the storage slot.

[0010] Furthermore, the limiting device also includes a limit switch, which is disposed on the limiting plate and is used to detect whether the pressure plate has reached a set distance from the top of the limiting plate.

[0011] Furthermore, the limiting device also includes a deceleration block, which is embedded in the card plate and has one end penetrating the side of the card plate adjacent to the card slot. The side of the deceleration block away from the card slot is larger than the side adjacent to the card slot. The deceleration block is used to increase the friction when the card plate contacts the assembly frame.

[0012] Furthermore, the vertical cross-section of the card plate adjacent to the card slot is arc-shaped, and the deceleration block is made of rubber.

[0013] Furthermore, the assembly frame also includes reinforcing ribs, which are used to reinforce the connection between the support rod and the support base plate or top plate. The bottom of the limiting plate is also fixed with reinforcing ribs, and the side ends of the reinforcing ribs at the bottom of the limiting plate are attached to the support rod.

[0014] Furthermore, the pressure plate includes a lifting connector, a pressure base plate, a main body, and an assembly plate. The side end face of the assembly plate is fixed with the same number of lifting connectors as the support base plate and in the same position. The lifting connectors are used to connect with the balance bar and the lifting mechanism. The bottom of the assembly plate is fixed with the main body, and the bottom of the main body is equipped with the pressure base plate.

[0015] Furthermore, the top of the assembly plate has a raised arc-shaped structure.

[0016] Furthermore, the pressure plate also includes an alarm and a pressure sensor. The alarm is used to indicate the operation and operating status of the pressure plate, and the pressure sensor is located between the main body and the assembly plate.

[0017] Furthermore, the lifting connector includes a connecting block, a ball bearing, an outer ring, an oil groove, a lubricating core, a cover ring, an inner ring, and a ball bearing cover. One end of the connecting block is fixed to the mounting plate, and the other end of the connecting block is located between the two support rods. The outer ring is through and limitedly mounted on the connecting block. The inner ring end of the outer ring has a ball groove that fits with the ball bearing. The ball bearing is embedded in the inner ring. The ball bearing cover is used to limit and seal the ball bearing mounted on the inner ring. One end of the ball bearing passes through the inner ring and fits with the ball groove of the outer ring. The other end of the ball bearing passes through the ball bearing cover and is connected to the balance bar or lifting mechanism. The outer ring has an oil groove inside. One end of the lubricating core is located in the oil groove, and the other end of the lubricating core communicates with the ball groove. The lubricating core is used to draw lubricating oil from the oil groove and contact the ball bearing. The top of the oil groove passes through the outer ring, and the cover ring is used to seal the oil groove where it passes through the outer ring.

[0018] Furthermore, the lubricating core is a cotton rope or hemp rope.

[0019] Furthermore, the lifting mechanism includes a motor, a drive shaft, a gearbox, and a lead screw. The motor is fixed on the top plate at the middle position of the pressure plate. The lead screw is parallel to the two support rods at the middle position of the pressure plate. The motor drives the lead screw to rotate through the drive shaft and the gearbox. The lead screw and the balls of the corresponding lifting connector form a ball screw structure.

[0020] (III) Beneficial Effects

[0021] One of the above technical solutions has the following advantages or beneficial effects:

[0022] By using a limiting plate with a locking pin, combined with slots arranged from top to bottom on the support rod for locking the pin, the limiting plate can be positioned by fixing it in slots at different heights. Furthermore, the electromagnet on the top ring of the limiting plate, and the sliding plate structure controlled by a compression spring at the receiving slot, allow the equipment to adjust the height of the limiting plate by driving the pressure plate down to the limiting plate, then activating the electromagnet. The electromagnet attracts the pressure plate while simultaneously attracting the compression spring, pulling the plate back into the receiving slot. This allows the limiting plate to rise and fall with the pressure plate. After reaching the appropriate height, the electromagnet is deactivated, allowing the compression spring to push the plate into the appropriate slot for positioning. This achieves convenient and quick height adjustment, eliminating the inconvenience of manual adjustment.

[0023] Furthermore, because the height of the limit plate can be adjusted remotely and conveniently, the pressure plate can be directly lowered to the ground for support when the equipment is idle, avoiding fatigue damage to the lifting structure or connections caused by prolonged suspension. At the same time, the retractable pressure plate and limit device also make equipment maintenance more convenient. Attached Figure Description

[0024] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0025] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0026] Figure 2 This is a schematic diagram of the structure of the present invention from the side view.

[0027] Figure 3 This is a cross-sectional structural schematic diagram of the side view of the support rod of the assembly frame of this utility model;

[0028] Figure 4 This utility model Figure 3 A magnified structural diagram of A in the middle;

[0029] Figure 5 This is a cross-sectional structural schematic diagram of the top view of the limiting device of this utility model;

[0030] Figure 6 This is a cross-sectional structural diagram of the lifting connector of this utility model;

[0031] Figure 7 This is a cross-sectional structural diagram of the pressure sensor assembly area of ​​this utility model;

[0032] In the diagram: Assembly rack - 1, Limiting device - 2, Pressure plate - 3, Connecting rod - 4, Lifting mechanism - 5, Weighbridge - 6, Balance bar - 7, Control console - 8, Support base plate - 101, Reinforcing rib - 102, Support rod - 103, Top plate - 104, Slot - 201, Limiting plate - 202, Card plate - 203, Compression spring - 204, Storage slot - 205, Washer ring - 206, Electromagnet - 207, Limit switch - 208, Speed ​​reducer - 209, Through hole - 21 0. Lifting connector - 301, Pressure base plate - 302, Main body - 303, Assembly plate - 304, Warning device - 305, Pressure sensor - 306, Connecting block - 30101, Ball bearing - 30102, Outer ring - 30103, Oil groove - 30104, Lubricating core - 30105, Cover ring - 30106, Inner ring - 30107, Ball bearing cover - 30108, Motor - 501, Drive shaft - 502, Gearbox - 503, Lead screw - 504. Detailed Implementation

[0033] The present invention will be further described in detail below with reference to the embodiments, but the implementation of the present invention is not limited thereto.

[0034] Example 1:

[0035] This utility model provides a static pressure strength testing device: its structure includes an assembly frame 1, a limiting device 2, a pressure plate 3, a connecting rod 4, a lifting mechanism 5, a weighbridge 6, a balance bar 7, and a control console 8;

[0036] The assembly frame 1 is in the shape of a U-shaped bracket with the opening facing downwards. There are three or more assembly frames 1, which are evenly arranged and fixedly connected by a connecting rod 4. The pressure plate 3 passes through the bottom of the three or more assembly frames 1 in sequence and is in clearance fit with the assembly frame 1. A lifting mechanism 5 is installed on the assembly frame 1 located in the middle of the pressure plate 3. The lifting mechanism 5 is used to drive the pressure plate 3 to rise and fall. The remaining assembly frames 1 are equipped with balance bars 7. The balance bars 7 are used to limit the balance when the pressure plate 3 rises and falls. The weighbridge 6 is located directly below the pressure plate 3. The control console 8 is used to connect and control various electrical control components.

[0037] The assembly frame 1 includes a supporting base plate 101, supporting rods 103 and a top plate 104. Two parallel supporting rods 103 are fixed to the top of the supporting base plate 101, with a gap between the two supporting rods 103. There are two supporting base plates 101. The top plate 104 is used to connect the tops of the supporting rods 103 of the two supporting base plates 101. The assembly frame 1 is equipped with a balance bar 7, which is arranged parallel between the two supporting rods 103.

[0038] The limiting device 2 includes a slot 201, a limiting plate 202, a locking plate 203, a compression spring 204, a storage slot 205, a washer 206, an electromagnet 207, and a through hole 210. The slots 201 are arranged from top to bottom on the support rod 103. The washer 206 is fixed to the top of the limiting plate 202. The limiting plate 202 and the locking plate 203 have a through hole 210 in the middle, which is used for the balance rod 7 to pass through. The electromagnet 207 is fixed to the top of the washer 206. The limiting plate 202 has storage slots 205 on both sides, which are used to store the locking plate 203. One end of the locking plate 203 is fixedly connected to one end of the compression spring 204, and the other end of the compression spring 204 is connected to the electromagnet 207. The compression spring 204 is used to push the locking plate 203 into the storage slot 205.

[0039] When using static pressure testing, the pressure plate 3 is raised by the lifting mechanism 5, and then the vehicle is parked on the weighbridge 6 below the pressure plate 3. Then the pressure plate 3 is lowered by the lifting mechanism 5 to apply pressure to the vehicle. The weighbridge 6 can perform pressure detection. After the pressure is applied to a certain level, the pressure plate 3 is raised to test the vehicle, thus completing the static pressure test of the vehicle.

[0040] When the limit height needs to be adjusted for different vehicle models during testing, the pressure plate 3 can be lowered to the washer ring 206 via the control panel 8. Then, the electromagnet 207 is activated, causing it to attach to the pressure plate 3. Simultaneously, the electromagnet 207 will attract and compress the spring 204, causing it to contract. As the spring 204 contracts, the locking plate 203 will be moved into the receiving slot 205, thus disengaging it from the slot 201. Since the limit plate 202 is inserted into the locking plate 203 via a pin... The limiting plate 202 is fixedly installed in the slot 201. When the card plate 203 is disengaged from the slot 201, the limiting plate 202 can move up and down with the pressure plate 3. After moving to the appropriate height, the electromagnet 207 stops working, causing the limiting plate 202 to disengage from the pressure plate 3 and also disengage from the compression spring 204. The compression spring 204 pushes the card plate 203 out of the storage slot 205 and into the new slot 201 for locking with a pin. This achieves quick and convenient height adjustment of the limiting plate 202, which is convenient for testing and adapting to different vehicle models.

[0041] In addition to the aforementioned convenient height adjustment, when the equipment is not in use, the pressure plate 3 can be lowered to support the ground or weighbridge 6, avoiding fatigue damage to the lifting structure or connections caused by prolonged suspension. At the same time, the lowerable pressure plate 3 and limit device 2 make equipment maintenance more convenient, avoiding the inconvenience and danger of climbing for maintenance.

[0042] Example 2:

[0043] Compared to Embodiment 1, the limiting device 2 in this embodiment also includes a limit switch 208. The limit switch 208 is disposed on the limiting plate 202. The limit switch 208 is used to detect whether the pressure plate 3 has reached the top of the limiting plate 202 at a set distance. In use, the limit switch 208 can detect whether the pressure plate 3 has reached the limiting device 2, so as to avoid the pressure plate 3 continuing to descend after reaching the limiting device 2, which would cause overpressure damage to the limiting device 2. The rest of the structure and effect remain unchanged.

[0044] Example 3:

[0045] Compared with the previous embodiment, the limiting device 2 in this embodiment further includes a deceleration block 209. The deceleration block 209 is embedded in the card plate 203 and one end penetrates the side of the card plate 203 adjacent to the card slot 201. The side of the deceleration block 209 away from the card slot 201 is larger than the side adjacent to the card slot 201. The deceleration block 209 is used to increase the friction when the card plate 203 contacts the assembly frame 1.

[0046] The vertical cross-section of the card plate 203 adjacent to the card slot 201 is arc-shaped, and the deceleration block 209 is made of rubber.

[0047] When in use, after the card plate 203 extends out, before it is fully inserted into the card slot 201, the friction of the deceleration block 209 prevents the card plate 203 from falling, making it easier for the subsequent lifting and pressing plate 3 to adjust the position of the card plate. The vertical cross-section of the card plate 203 adjacent to the card slot 201 is designed with an arc shape, so that even if there is a small misalignment between the card plate 203 and the card slot 201, it can still smoothly enter the card slot 201, further facilitating the adjustment and use of the limiting plate 202. The rest of the structure and effect remain unchanged.

[0048] Example 4:

[0049] Compared to the previous embodiments, the assembly frame 1 in this embodiment also includes a reinforcing rib 102. The reinforcing rib 102 is used to strengthen the support at the connection between the support rod 103 and the support base plate 101 or top plate 104. The bottom of the limiting plate 202 is also fixed with a reinforcing rib 102. The side end of the reinforcing rib 102 at the bottom of the limiting plate 202 is in contact with the support rod 103, making the connection and stress points of the equipment more stable. The rest of the structure and effect remain unchanged.

[0050] Example 5:

[0051] Compared to the previous embodiments, the pressure plate 3 in this embodiment includes a lifting connector 301, a pressure base plate 302, a main body 303, and an assembly plate 304. The side end face of the assembly plate 304 is fixed with the same number of lifting connectors 301 as the support base plate 101 and in the same position. The lifting connectors 301 are used to connect with the balance bar 7 and the lifting mechanism 5. The bottom of the assembly plate 304 is fixed with the main body 303, and the bottom of the main body 303 is equipped with the pressure base plate 302.

[0052] The top of the assembly plate 304 has a raised arc-shaped structure.

[0053] When in use, the multi-layered combined pressure plate 3 is easier to maintain and replace, saving maintenance costs. The arc-shaped structure design with a raised top of the assembly plate 304 allows the assembly plate 304 to better hold the two ends of the main body 303, preventing the two ends of the main body 303 and the assembly plate 304 from drooping due to gravity. The rest of the structure and effect remain unchanged.

[0054] Example 6:

[0055] Compared to the previous embodiments, the pressure plate 3 in this embodiment also includes an alarm 305 and a pressure sensor 306. The alarm 305 is used to indicate the operation and operating status of the pressure plate 3. The pressure sensor 306 is located between the main body 303 and the assembly plate 304. When the equipment is used under static pressure, the alarm 305 can prevent situations where operational errors cannot be detected in time and can remind personnel to stay away from dangerous areas in time. The setting of the pressure sensor 306, combined with the weighbridge 6, can comprehensively judge the static pressure from the top pressure and the pressure applied to the bottom, reducing errors and preventing the failure of a single sensor from affecting the detection. The rest of the structure and effect remain unchanged.

[0056] Example 7:

[0057] Compared to the previous embodiments, the lifting connector 301 in this embodiment includes a connecting block 30101, a ball bearing 30102, an outer ring 30103, an oil groove 30104, a lubricating core 30105, a cover ring 30106, an inner ring 30107, and a ball bearing cover 30108. One end of the connecting block 30101 is fixed to the mounting plate 304, and the other end of the connecting block 30101 is located between the two support rods 103. The outer ring 30103 is through-mounted and limited on the connecting block 30101. The inner ring end of the outer ring 30103 has a ball groove that fits with the ball bearing 30102. The ball bearing 30102 is embedded in the inner ring 30107. The ball bearing cover 30108 is used to mount the ball bearing 30102. A limiting cap is fitted on the inner ring 30107. One end of the ball 30102 passes through the inner ring 30107 and fits into the ball groove of the outer ring 30103. The other end of the ball 30102 passes through the ball cover 30108 and is connected to the balance bar 7 or the lifting mechanism 5. An oil groove 30104 is provided inside the outer ring 30103. One end of the lubricating core 30105 is located in the oil groove 30104, and the other end of the lubricating core 30105 communicates with the ball groove. The lubricating core 30105 is used to draw lubricating oil from the oil groove 30104 and contact the ball 30102. The top of the oil groove 30104 passes through the outer ring 30103. The cover ring 30106 is used to seal the oil groove 30104 where it passes through the outer ring 30103.

[0058] The lubricating core 30105 is a cotton rope or hemp rope.

[0059] During use, select appropriate lubricating oil and add it to the oil tank 30104. Then, due to capillary effect, the lubricating core 30105 conducts the oil to the ball groove area of ​​the outer ring 30103, where it comes into contact with the mating balls 30102. During the lifting and lowering operation of the equipment, if the friction between the balls 30102 and the balance bar 7 or the lifting mechanism 5 increases to a certain extent, the balls 30102 will roll, causing the surface in contact with the lubricating oil to roll to the point of contact with the balance bar 7 or the lifting mechanism 5, thus achieving automatic lubrication. If the lubrication is sufficient, the rotation will be reduced or stopped, reducing the amount of lubricating oil. This design avoids unnecessary wear and tear and prevents excessive lubrication. When the lifting connector 301 needs maintenance, the oil groove 30104 can be cleaned and replenished by opening the cover ring 30106, and the lubrication core 30105 can be replaced and maintained. The ball bearing cover 30108 can be unlocked to remove the ball bearing 30102 from the inner ring 30107, allowing for replacement and maintenance of the inner ring 30107 and the ball bearing 30102. This increases the service life of the equipment and further enhances the convenience of equipment maintenance, while the rest of the structure and effects remain unchanged.

[0060] Example 8:

[0061] Compared to the previous embodiments, the lifting mechanism 5 in this embodiment includes a motor 501, a drive shaft 502, a gearbox 503, and a lead screw 504. The motor 501 is fixed on the top plate 104 at the middle position of the pressure plate 3. The lead screw 504 is parallel to the two support rods 103 at the middle position of the pressure plate 3. The motor 501 drives the lead screw 504 to rotate through the drive shaft 502 and the gearbox 503. The lead screw 504 and the ball bearings 30102 of the corresponding lifting connector 301 form a ball screw structure, so that the device can drive the pressure plate 3 to lift by rotating the lead screw 504 driven by the motor 501. The rest of the structure and effect remain unchanged.

[0062] In the description of this utility model, it should be noted that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0063] The control method of this utility model is to control the device by manually starting and stopping the switch. The wiring diagram of the power element and the supply of power are common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, the control method and wiring layout will not be explained in detail.

[0064] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0065] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A static pressure strength testing device, the structure of which includes an assembly frame (1), a limiting device (2), a pressure plate (3), a connecting rod (4), a lifting mechanism (5), a weighbridge (6), a balance bar (7), and a control console (8); characterized in that The assembly frame (1) is in the shape of a U-shaped bracket with the opening facing downwards. There are three or more assembly frames (1). The three assembly frames (1) are evenly arranged and fixedly connected by a connecting rod (4). The pressure plate (3) passes through the bottom of the three or more assembly frames (1) in sequence and is in clearance fit with the assembly frame (1). A lifting mechanism (5) is installed on the assembly frame (1) located in the middle of the pressure plate (3). The lifting mechanism (5) is used to drive the pressure plate (3) to rise and fall. A balance bar (7) is installed on the other assembly frames (1). The balance bar (7) is used to limit the balance when the pressure plate (3) rises and falls. The weighbridge (6) is located directly below the pressure plate (3). The control console (8) is used to connect and control each electrical control component. The assembly frame (1) includes a support base plate (101), support rods (103) and a top plate (104). Two parallel support rods (103) are fixed on the top of the support base plate (101), and a gap is left between the two support rods (103). There are two support base plates (101). The top plate (104) is used to connect the top of the support rods (103) of the two support base plates (101). The assembly frame (1) is provided with a balance rod (7), which is arranged parallel between the two support rods (103). The limiting device (2) includes a slot (201), a limiting plate (202), a locking plate (203), a compression spring (204), a storage slot (205), a washer (206), an electromagnet (207), and a through hole (210). The slots (201) are arranged from top to bottom on the support rod (103). The top of the limiting plate (202) is fixed with a washer (206). The limiting plate (202) and the locking plate (203) are provided with a through hole (210) in the middle. 0) For the passage of the balance bar (7), the top of the pad ring (206) is fixed with an electromagnet (207), and the two sides of the limiting plate (202) are provided with storage slots (205). The storage slots (205) are used to store the card plate (203). One end of the card plate (203) is fixedly connected to one end of the compression spring (204), and the other end of the compression spring (204) is connected to the electromagnet (207). The compression spring (204) is used to push the card plate (203) into the storage slot (205).

2. The hydrostatic strength test detection device of claim 1, wherein: The limiting device (2) also includes a limit switch (208), which is located on the limiting plate (202). The limit switch (208) is used to detect whether the pressure plate (3) has reached the top of the limiting plate (202) by a set distance.

3. The hydrostatic strength test detection apparatus of claim 1, wherein: The limiting device (2) also includes a deceleration block (209), which is embedded in the card plate (203) and one end of the card plate (203) extends through the side of the card plate (203) adjacent to the card slot (201). The side of the deceleration block (209) away from the card slot (201) is larger than the side adjacent to the card slot (201). The deceleration block (209) is used to increase the friction when the card plate (203) contacts the assembly frame (1).

4. The hydrostatic strength test detection apparatus of claim 3, wherein: The vertical cross-section of the card plate (203) adjacent to the card slot (201) is arc-shaped, and the deceleration block (209) is made of rubber.

5. The hydrostatic strength test detection apparatus of claim 1, wherein: The assembly frame (1) also includes a reinforcing rib (102), which is used to reinforce the connection between the support rod (103) and the support base plate (101) or top plate (104). The bottom of the limiting plate (202) is also fixed with a reinforcing rib (102), and the side end of the reinforcing rib (102) at the bottom of the limiting plate (202) is in contact with the support rod (103).

6. The hydrostatic strength test detection apparatus of claim 1, wherein: The pressure plate (3) includes a lifting connector (301), a pressure base plate (302), a main body (303), and an assembly plate (304). The side end face of the assembly plate (304) is fixed with the same number of lifting connectors (301) as the support base plate (101) and corresponding in position. The lifting connectors (301) are used to connect with the balance bar (7) and the lifting mechanism (5). The bottom of the assembly plate (304) is fixed with the main body (303), and the bottom of the main body (303) is equipped with the pressure base plate (302).

7. The hydrostatic strength test detection apparatus of claim 6, wherein: The pressure plate (3) also includes an alarm (305) and a pressure sensor (306). The alarm (305) is used to indicate the operation and running status of the pressure plate (3). The pressure sensor (306) is located between the main body (303) and the assembly plate (304).

8. The hydrostatic strength test detection apparatus of claim 6, wherein: The lifting connector (301) includes a connecting block (30101), a ball (30102), an outer ring (30103), an oil groove (30104), a lubricating core (30105), a cover ring (30106), an inner ring (30107), and a ball cover (30108). One end of the connecting block (30101) is fixed to the mounting plate (304), and the other end of the connecting block (30101) is located between the two support rods (103). The outer ring (30103) is mounted through and limited on the connecting block (30101). The inner ring end of the outer ring (30103) is provided with a ball groove that fits with the ball (30102). The ball (30102) is embedded in the inner ring (30107). The ball cover (30108) is used for mounting the ball (30102) on the inner ring (30107). The limiting cover on 0107) has one end of the ball (30102) passing through the inner ring (30107) and fitting into the ball groove of the outer ring (30103). The other end of the ball (30102) passes through the ball cover (30108) and is connected to the balance bar (7) or the lifting mechanism (5). The outer ring (30103) is provided with an oil groove (30104). One end of the lubricating core (30105) is provided with... Inside the oil groove (30104), the other end of the lubricating core (30105) is connected to the ball groove. The lubricating core (30105) is used to draw the lubricating oil from the oil groove (30104) and contact it with the ball (30102). The top of the oil groove (30104) passes through the outer ring (30103). The cover ring (30106) is used to seal the oil groove (30104) at the point where it passes through the outer ring (30103).

9. The hydrostatic strength test detection apparatus of claim 8, wherein: The lubricating core (30105) is a cotton rope or hemp rope.

10. The hydrostatic strength test detection apparatus of claim 8, wherein: The lifting mechanism (5) includes a motor (501), a transmission shaft (502), a gearbox (503), and a lead screw (504). The motor (501) is fixed on the top plate (104) at the middle position of the pressure plate (3). The lead screw (504) is mounted in parallel between the two support rods (103) at the middle position of the pressure plate (3). The motor (501) drives the lead screw (504) to rotate through the transmission shaft (502) and the gearbox (503). The lead screw (504) and the balls (30102) of the corresponding lifting connector (301) form a ball screw structure.

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