A compression strength detection device for a cable protection pipe

Abstract

The application relates to the technical field of cable protection pipe detection, in particular to a compression strength detection device for a cable protection pipe, which comprises a portal frame, a vertical sliding platform slidingly arranged in the portal frame, a cable protection pipe arranged below the vertical sliding platform, an upper pressure intelligent sensor arranged above the cable protection pipe, a supporting driving assembly arranged below the cable protection pipe, two groups of air pressure connecting assemblies symmetrically arranged outside the cable protection pipe, and two groups of lateral pressure detection assemblies symmetrically arranged outside the cable protection pipe. Through the cooperation of the supporting driving assembly, the air pressure connecting assemblies and the lateral pressure detection assemblies, the compression strength detection device can synchronously press and detect multiple surfaces of the cable protection pipe, can simulate the combined stress state of the overlying load + lateral earth pressure that the cable protection pipe bears in the real buried environment, and can further improve the accuracy of the cable protection pipe detection result and reduce the detection error.

Description

Technical Field

[0001] This invention relates to the field of cable protection pipe testing technology, and in particular to a device for testing the compressive strength of cable protection pipes. Background Technology

[0002] Cable protection pipes are important components used in power engineering for laying and protecting power cables. Their compressive strength directly determines the safety and reliability of power cables in actual service environments.

[0003] During service, underground cable protection pipes not only need to withstand the vertical pressure from the overlying soil and road traffic loads, but also the horizontal lateral extrusion pressure caused by the displacement of the surrounding soil. They are under multi-directional compound extrusion conditions, so the compressive strength test of cable protection pipes is particularly important.

[0004] Existing cable protection pipes are typically tested for compressive strength using a compression testing machine. When applying compressive load to the pipe, the existing testing equipment usually applies pressure in a single direction. The intelligent sensor driven by the drive mechanism applies pressure to the surface of the pipe. However, the existing compression testing equipment can only simulate static compression conditions in the vertical direction, and it is difficult to simulate the multi-directional compound extrusion conditions that cable protection pipes are subjected to in actual service environments. Although some existing equipment is equipped with lateral clamping or positioning components, their lateral mechanisms are only used to fix and limit the pipe, rather than to apply horizontal compressive loads simultaneously. In essence, it is still a uniaxial loading test.

[0005] Therefore, we provide a device for testing the compressive strength of cable protection pipes. Summary of the Invention

[0006] The purpose of this invention is to address the aforementioned technical problems by providing a device for testing the compressive strength of cable protection pipes, thereby ensuring the accuracy of pressure test results.

[0007] In view of this, the present invention provides a compressive strength testing device for cable protection pipes, including a gantry frame and a vertical sliding platform slidably disposed inside the gantry frame, wherein a cable protection pipe is disposed below the vertical sliding platform and an upper pressure intelligent sensor is disposed above the cable protection pipe; A support drive assembly is provided below the cable protection pipe. The support drive assembly includes a first multi-stage telescopic rod provided below the cable protection pipe. Two output pipes are symmetrically installed on the lower half surface of the first multi-stage telescopic rod. A limiting multi-stage telescopic rod is provided inside the first multi-stage telescopic rod. A spring is sleeved on the outside of the limiting multi-stage telescopic rod. A V-shaped support block is installed at the upper end of the first multi-stage telescopic rod. Two sets of pneumatic connection assemblies are symmetrically arranged on the outside of the cable protection pipe. Each pneumatic connection assembly includes a corrugated hose connected to the outer end of the output pipe, and an L-shaped connector is connected to the end of the corrugated hose away from the output pipe. Two sets of lateral pressure detection components are symmetrically arranged on the outside of the cable protection pipe. The lateral pressure detection components include a second multi-stage telescopic rod connected to the L-shaped connector. A fixed head is installed at the outer end of the second multi-stage telescopic rod, and a lateral pressure intelligent sensor is installed at the outer end of the fixed head.

[0008] Preferably, two sets of adjustment components are symmetrically arranged on the outside of the cable protection pipe. The adjustment components include a fixing ring installed on the surface of the second multi-stage telescopic rod, and a screw is installed on the surface of the fixing ring.

[0009] Preferably, a screw cylinder is sleeved on the outside of the screw, the screw and the screw cylinder are screwed together, the upper end of the screw cylinder is rotatably connected to the lower end of the vertical sliding platform, and a rotating handle is installed on the surface of the screw cylinder.

[0010] Preferably, a scale rod is provided on the outside of the screw cylinder, the scale rod is arranged parallel to and spaced apart from the screw, the lower end of the scale rod is fixedly installed on the surface of the second multi-stage telescopic rod, a limiting cylinder is sleeved on the outside of the scale rod, the scale rod and the limiting cylinder are slidably arranged, and the upper end of the limiting cylinder is fixedly installed on the lower surface of the vertical sliding platform.

[0011] Preferably, the lower end of the first multi-stage telescopic rod is fixedly installed on the gantry frame, the interior of the first multi-stage telescopic rod is through-connected, and the first multi-stage telescopic rod is through-connected with the output pipe.

[0012] Preferably, the limiting multi-stage telescopic rod is scaled proportionally to the first multi-stage telescopic rod, the upper end of the limiting multi-stage telescopic rod is fixedly connected to the inner wall of the upper end of the first multi-stage telescopic rod, and the lower end of the limiting multi-stage telescopic rod is fixedly connected to the inner wall of the lower end of the first multi-stage telescopic rod.

[0013] Preferably, the upper end of the spring is fixedly connected to the inner wall of the upper end of the first multi-stage telescopic rod, and the lower end of the spring is fixedly connected to the inner wall of the lower end of the first multi-stage telescopic rod.

[0014] Preferably, the first multi-stage telescopic rod is composed of several rods sleeved together, and each rod has a sealing groove on its surface, with a sealing ring embedded in the inner wall of the sealing groove.

[0015] Preferably, the corrugated hose is configured to pass through the output pipe, and the corrugated hose is configured to pass through the L-shaped connector.

[0016] Preferably, the second multi-stage telescopic rod is internally continuous, and the second multi-stage telescopic rod is continuously connected to the L-shaped connector.

[0017] Compared with the prior art, the present invention provides a device for testing the compressive strength of cable protection pipes, which has the following advantages: This invention, through the cooperation of the support drive component, the pneumatic connection component, and the lateral pressure detection component, can simultaneously apply pressure to multiple surfaces of the cable protection pipe, realistically simulating the combined stress state of the cable protection pipe under the overlying load and lateral soil pressure in a real buried environment, further improving the accuracy of the cable protection pipe detection results and reducing detection errors.

[0018] This invention enables simultaneous vertical and horizontal pressure detection using a single vertical driving force, eliminating the need for a separate driving unit for the horizontal direction and reducing manufacturing costs. Furthermore, it features an internal spring for automatic reset after detection and a negative pressure mechanism for synchronous retraction of the horizontal telescopic rod, eliminating the need for an additional reset mechanism.

[0019] This invention enables pressure testing of cable protection pipes of different diameters, further expanding the applicability of the device.

[0020] The parts of this device not covered herein are the same as or can be implemented using existing technologies. This invention has a simple structure and is easy to operate. Attached Figure Description

[0021] Figure 1 This is an overall schematic diagram of a cable protection pipe compressive strength testing device proposed in this invention; Figure 2 This is a front view of a cable protection pipe compressive strength testing device proposed in this invention; Figure 3 This is an enlarged schematic diagram at point A of the compressive strength testing device for cable protection pipes proposed in this invention; Figure 4 This is a schematic diagram of the support drive assembly of a cable protection pipe compressive strength testing device proposed in this invention; Figure 5 This is an enlarged schematic diagram at point B of the compressive strength testing device for cable protection pipe proposed in this invention; Figure 6 This is a schematic diagram of the lateral pressure detection component of a cable protection pipe compressive strength testing device proposed in this invention; Figure 7 This is a schematic diagram of the adjustment component of a cable protection pipe compressive strength testing device proposed in this invention; Figure 8This is a schematic diagram of the operation of the adjustment component of the cable protection pipe compressive strength testing device proposed in this invention.

[0022] In the diagram: 1. Gantry frame; 2. Vertical sliding platform; 3. Cable protection pipe; 4. Upper pressure intelligent sensor; 5. Support drive assembly; 501. First multi-stage telescopic rod; 502. Output pipe; 503. Limiting multi-stage telescopic rod; 504. Spring; 505. V-shaped support block; 506. Sealing groove; 507. Sealing ring; 6. Pneumatic connection assembly; 601. Corrugated hose; 602. L-shaped connector; 7. Lateral pressure detection assembly; 701. Second multi-stage telescopic rod; 702. Fixing head; 703. Lateral pressure intelligent sensor; 8. Adjustment assembly; 801. Fixing ring; 802. Screw; 803. Screw barrel; 804. Rotating handle; 805. Scale rod; 806. Limiting cylinder. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0024] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", 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 invention 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 invention.

[0025] Example: A device for testing the compressive strength of cable protection pipes, such as... Figures 1-8 As shown, it includes a gantry frame 1 and a vertical sliding platform 2 that is slidably installed inside the gantry frame 1. A cable protection pipe 3 is installed below the vertical sliding platform 2, and an upper pressure intelligent sensor 4 is installed above the cable protection pipe 3. Since the use and operation of the upper pressure intelligent sensor 4 are existing known technologies, they will not be described in detail here. When the existing pressure testing device performs pressure resistance testing on the cable protection pipe 3, the cable protection pipe 3 is placed on a fixed base on the gantry frame 1. Then, the vertical sliding platform 2 moves the upper pressure intelligent sensor 4 downward. When the upper pressure intelligent sensor 4 contacts the surface of the cable protection pipe 3, the vertical sliding platform 2 continues to move downward. The mutual pressure between the upper pressure intelligent sensor 4 and the cable protection pipe 3 will be reflected to the system through the upper pressure intelligent sensor 4, thereby determining the pressure resistance of the cable protection pipe 3. The testing process of the cable protection pipe 3 is a well-known existing technology and will not be described in detail here.

[0026] A support drive assembly 5 is installed below the cable protection pipe 3. The support drive assembly 5 is made of high-strength materials to ensure its stability during operation. The drive assembly 5 includes a first multi-stage telescopic rod 501 located below the cable protection pipe 3. The first multi-stage telescopic rod 501 can only extend and retract, without rotation. Since the first multi-stage telescopic rod 501 is existing technology, it will not be described in detail here. The lower end of the first multi-stage telescopic rod 501 is fixedly installed on the gantry frame 1. The gantry frame 1 provides support for the first multi-stage telescopic rod 501. The interior of the first multi-stage telescopic rod 501 is... The first multi-stage telescopic rod 501 is composed of several rods, each with a sealing groove 506 on its surface. A sealing ring 507 is embedded in the inner wall of the sealing groove 506. At this time, the first multi-stage telescopic rod 501 stores gas. Simultaneously, the cooperation of the sealing groove 506 and the sealing ring 507 prevents gas from leaking out through the gaps between the rods, ensuring the airtightness of the first multi-stage telescopic rod 501. Two output pipes 502 are symmetrically installed on the lower half of the first multi-stage telescopic rod 501, and the first multi-stage telescopic rod 501 and the output pipes 502 are connected. At this time, the output pipes 502 and the first multi-stage telescopic rod 501 are connected. The existing sealing structure is used for sealing between the two parts. A limiting multi-stage telescopic rod 503 is provided inside the first multi-stage telescopic rod 501. The limiting multi-stage telescopic rod 503 is proportionally scaled to the first multi-stage telescopic rod 501. At this time, the outer diameter of the limiting multi-stage telescopic rod 503 is smaller than the outer diameter of the first multi-stage telescopic rod 501, and the length of the limiting multi-stage telescopic rod 503 is the same as that of the first multi-stage telescopic rod 501. The limiting multi-stage telescopic rod 503 is not described in detail here. The upper end of the limiting multi-stage telescopic rod 503 is fixedly connected to the upper inner wall of the first multi-stage telescopic rod 501, and the lower end of the limiting multi-stage telescopic rod 503 is fixedly connected to the lower inner wall of the first multi-stage telescopic rod 501. Next, the limiting multi-stage telescopic rod 503 extends and retracts synchronously with the first multi-stage telescopic rod 501. A spring 504 is sleeved on the outside of the limiting multi-stage telescopic rod 503. At this time, the limiting multi-stage telescopic rod 503 can prevent the spring 504 from bending and ensure the stability of the spring 504 during operation. The upper end of the spring 504 is fixedly connected to the inner wall of the upper end of the first multi-stage telescopic rod 501, and the lower end of the spring 504 is fixedly connected to the inner wall of the lower end of the first multi-stage telescopic rod 501. A V-shaped support block 505 is installed on the upper end of the first multi-stage telescopic rod 501. At this time, the cable protection pipe 3 achieves the effect of support and positioning through the V-shaped support block 505. Before conducting the compression test on the cable protection pipe 3, the cable protection pipe 3 is placed on the support drive assembly 5. At this time, the spring 504 is in an uncompressed state, and the limit multi-stage telescopic rod 503 and the first multi-stage telescopic rod 501 are in an extended state. The first multi-stage telescopic rod 501 is filled with gas. When the vertical sliding platform 2 drives the upper pressure intelligent sensor 4 to move downward, the cable protection pipe 3 moves downward under the pressure of the upper pressure intelligent sensor 4, and the first multi-stage telescopic rod 501 will retract downward. The gas inside the first multi-stage telescopic rod 501 will move to the next process through the output pipe 502. During this process, the spring 504 is compressed.

[0027] Two sets of pneumatic connection assemblies 6 are symmetrically arranged on the outside of the cable protection pipe 3. The pneumatic connection assembly 6 includes a corrugated hose 601 connected to the outer end of the output pipe 502. The use of corrugated hose 601 can avoid bending problems. At the same time, corrugated hose 601 has good ductility, ensuring the stability of corrugated hose 601 during operation. Corrugated hose 601 and output pipe 502 are connected in a through manner. At this time, the gas inside the first multi-stage telescopic rod 501 can move into the corrugated hose 601. An L-shaped connector 602 is connected to the end of corrugated hose 601 away from output pipe 502. Corrugated hose 601 and L-shaped connector 602 are connected in a through manner. At this time, the gas inside corrugated hose 601 can move into L-shaped connector 602. When the first multi-stage telescopic rod 501 retracts, the gas inside the first multi-stage telescopic rod 501 is transported through the output pipe 502 to the corrugated hose 601 and the L-shaped connector 602. The corrugated hose 601 and the L-shaped connector 602 serve as intermediaries for transmission.

[0028] Two sets of lateral pressure detection components 7 are symmetrically arranged on the outside of the cable protection pipe 3. The lateral pressure detection component 7 includes a second multi-stage telescopic rod 701 connected to the L-shaped connector 602. At this time, the structure of the second multi-stage telescopic rod 701 is similar to that of the first multi-stage telescopic rod 501, which will not be described in detail here. At the same time, the second multi-stage telescopic rod 701 is initially in a contracted state, and its interior is filled with gas. The interior of the second multi-stage telescopic rod 701 is through-connected, and the second multi-stage telescopic rod 701 is through-connected to the L-shaped connector 602. At this time, the first multi-stage telescopic rod 501 and the second multi-stage telescopic rod 701 are connected. A fixing head 702 is installed at the outer end of the second multi-stage telescopic rod 701, and a lateral pressure intelligent sensor 703 is installed at the outer end of the fixing head 702. At this time, the lateral pressure intelligent sensor 703 is based on the same principle as the upper pressure intelligent sensor 4, which will not be described in detail here.

[0029] When the first multi-stage telescopic rod 501 supplies gas into the corrugated hose 601, L-shaped connector 602, and the second multi-stage telescopic rod 701, the second multi-stage telescopic rod 701 will extend outward under the compression of the gas. The fixed head 702 and the lateral pressure intelligent sensor 703 will extend synchronously with the second multi-stage telescopic rod 701. When both lateral pressure intelligent sensors 703 are in contact with the surface of the cable protection pipe 3, the gas between the first multi-stage telescopic rod 501 and the second multi-stage telescopic rod 701 is in equilibrium, and the second multi-stage telescopic rod 701 will be unable to extend a large distance. It will no longer move downwards by a large distance. At this time, the upper pressure intelligent sensor 4 and the lateral pressure intelligent sensor 703 will apply pressure to the surface of the cable protection pipe 3 to measure the pressure resistance of the cable protection pipe 3. After the test is completed, the upper pressure intelligent sensor 4 moves upwards, and the cable protection pipe 3 and the first multi-stage telescopic rod 501 are no longer squeezed. The spring 504 drives the first multi-stage telescopic rod 501 back to the initial state. During the extension of the first multi-stage telescopic rod 501, the first multi-stage telescopic rod 501 will draw out the gas inside the second multi-stage telescopic rod 701. Under the action of negative pressure, the second multi-stage telescopic rod 701 will return to the initial state.

[0030] Two sets of adjustment components 8 are symmetrically arranged on the outside of the cable protection pipe 3. The adjustment components 8 are made of high-strength materials to ensure the stability of the adjustment components 8 during operation. The adjustment components 8 include a fixing ring 801 installed on the surface of the second multi-stage telescopic rod 701, and a screw 802 is installed on the surface of the fixing ring 801.

[0031] A screw barrel 803 is sleeved on the outside of the screw 802. The screw 802 and the screw barrel 803 are connected by a thread. At this time, the screw 802 and the screw barrel 803 have good self-locking properties. The upper end of the screw barrel 803 is rotatably connected to the lower end of the vertical sliding platform 2. A rotating handle 804 is installed on the surface of the screw barrel 803. At this time, the screw barrel 803 can be rotated by rotating the rotating handle 804.

[0032] A caliper 805 is provided on the outside of the screw barrel 803. At this time, the surface of the caliper 805 moves a value, thereby enabling precise positioning of the adjustment amount. The caliper 805 and the screw 802 are arranged parallel and spaced apart. The lower end of the caliper 805 is fixedly installed on the surface of the second multi-stage telescopic rod 701. A limiting cylinder 806 is sleeved on the outside of the caliper 805. The caliper 805 and the limiting cylinder 806 are slidably arranged. The upper end of the limiting cylinder 806 is fixedly installed on the lower surface of the vertical sliding platform 2. At this time, with the cooperation of the screw 802 and the screw barrel 803, as well as the caliper 805 and the limiting cylinder 806, the rotation of the second multi-stage telescopic rod 701 can be prevented, ensuring the stability of the operation of the screw 802 and the screw barrel 803.

[0033] After the cable protection tube 3 is placed on the V-shaped support block 505, it is necessary to ensure that both lateral pressure intelligent sensors 703 can exert a squeezing effect on the surface of the cable protection tube 3. Therefore, the position of the lateral pressure intelligent sensors 703 needs to be adjusted. First, the upper pressure intelligent sensor 4 is brought into contact with the surface of the cable protection tube 3. According to the radius of the cable protection tube 3, the screw 803 is rotated. The lower end of the screw 802 will drive the fixing ring 801 and the second multi-stage telescopic rod 701 to move downward synchronously. The lateral pressure intelligent sensor 703 will move synchronously with the second multi-stage telescopic rod 701. At the same time, the measuring rod 805 extends downward synchronously. According to the value on the surface of the measuring rod 805, the downward movement range of the second multi-stage telescopic rod 701 can be accurately adjusted. After the lateral pressure intelligent sensor 703 is adjusted, since the second multi-stage telescopic rod 701 moves up and down synchronously with the vertical sliding platform 2, there will be no situation where the lateral pressure intelligent sensor 703 and the cable protection tube 3 do not align.

[0034] With the cooperation of the support drive component 5, the pneumatic connection component 6 and the lateral pressure detection component 7, multiple surfaces of the cable protection pipe 3 can be simultaneously pressure tested, which truly simulates the combined stress state of the cable protection pipe 3 under the overburden load and lateral soil pressure in the real buried environment, further improving the accuracy of the test results of the cable protection pipe 3 and reducing the test error.

[0035] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A device for testing the compressive strength of cable protection pipes, comprising a gantry frame (1), characterized in that, And a vertical sliding platform (2) is slidably installed inside the gantry (1), a cable protection pipe (3) is installed below the vertical sliding platform (2), and an upper pressure intelligent sensor (4) is installed above the cable protection pipe (3). A support drive assembly (5) is provided below the cable protection pipe (3). The support drive assembly (5) includes a first multi-stage telescopic rod (501) provided below the cable protection pipe (3). Two output pipes (502) are symmetrically installed on the lower half surface of the first multi-stage telescopic rod (501). A limiting multi-stage telescopic rod (503) is provided inside the first multi-stage telescopic rod (501). A spring (504) is sleeved on the outside of the limiting multi-stage telescopic rod (503). A V-shaped support block (505) is installed at the upper end of the first multi-stage telescopic rod (501). Two sets of pneumatic connection assemblies (6) are symmetrically arranged on the outside of the cable protection pipe (3). The pneumatic connection assembly (6) includes a corrugated hose (601) connected to the outer end of the output pipe (502). An L-shaped connector (602) is connected to the end of the corrugated hose (601) away from the output pipe (502). Two sets of lateral pressure detection components (7) are symmetrically arranged on the outside of the cable protection pipe (3). The lateral pressure detection component (7) includes a second multi-stage telescopic rod (701) connected to the L-shaped connector (602). A fixing head (702) is installed at the outer end of the second multi-stage telescopic rod (701). A lateral pressure intelligent sensor (703) is installed at the outer end of the fixing head (702).

2. The compressive strength testing device for a cable protection pipe according to claim 1, characterized in that, Two sets of adjustment components (8) are symmetrically arranged on the outside of the cable protection pipe (3). The adjustment component (8) includes a fixing ring (801) installed on the surface of the second multi-stage telescopic rod (701). A screw (802) is installed on the surface of the fixing ring (801).

3. The compressive strength testing device for a cable protection pipe according to claim 2, characterized in that, The screw (802) is fitted with a screw cylinder (803) on the outside. The screw (802) and the screw cylinder (803) are connected by a thread. The upper end of the screw cylinder (803) is rotatably connected to the lower end of the vertical sliding platform (2). A rotating handle (804) is installed on the surface of the screw cylinder (803).

4. The compressive strength testing device for a cable protection pipe according to claim 3, characterized in that, A scale rod (805) is provided on the outside of the screw barrel (803). The scale rod (805) is arranged parallel to the screw (802) at intervals. The lower end of the scale rod (805) is fixedly installed on the surface of the second multi-stage telescopic rod (701). A limiting cylinder (806) is sleeved on the outside of the scale rod (805). The scale rod (805) and the limiting cylinder (806) are slidably arranged. The upper end of the limiting cylinder (806) is fixedly installed on the lower surface of the vertical sliding platform (2).

5. The compressive strength testing device for a cable protection pipe according to claim 1, characterized in that, The lower end of the first multi-stage telescopic rod (501) is fixedly installed on the gantry frame (1). The first multi-stage telescopic rod (501) is internally connected and is connected to the output pipe (502).

6. The compressive strength testing device for a cable protection pipe according to claim 1, characterized in that, The limiting multi-stage telescopic rod (503) is scaled proportionally to the first multi-stage telescopic rod (501). The upper end of the limiting multi-stage telescopic rod (503) is fixedly connected to the upper inner wall of the first multi-stage telescopic rod (501), and the lower end of the limiting multi-stage telescopic rod (503) is fixedly connected to the lower inner wall of the first multi-stage telescopic rod (501).

7. The compressive strength testing device for a cable protection pipe according to claim 1, characterized in that, The upper end of the spring (504) is fixedly connected to the inner wall of the upper end of the first multi-stage telescopic rod (501), and the lower end of the spring (504) is fixedly connected to the inner wall of the lower end of the first multi-stage telescopic rod (501).

8. The compressive strength testing device for a cable protection pipe according to claim 1, characterized in that, The first multi-stage telescopic rod (501) is composed of several rods, and each rod has a sealing groove (506) on its surface. A sealing ring (507) is embedded in the inner wall of the sealing groove (506).

9. The compressive strength testing device for a cable protection pipe according to claim 1, characterized in that, The corrugated hose (601) is connected to the output pipe (502), and the corrugated hose (601) is connected to the L-shaped connector (602).

10. The compressive strength testing device for a cable protection pipe according to claim 1, characterized in that, The second multi-stage telescopic rod (701) is internally connected, and the second multi-stage telescopic rod (701) is internally connected to the L-shaped connector (602).

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