A torsional compressive strength testing device for MPP cable protection tube processing

Abstract

The utility model proposes a torsional pressure strength testing device for MPP cable protection tube processing, which relates to the technical field of protection tube testing devices, including a workbench, two guide rails vertically distributed on the workbench, tube clamping mechanisms for clamping the protection tube are slidably installed on the two guide rails, the two tube clamping mechanisms can be rotated to bend the protection tube, and a pressure measuring mechanism is installed between the two guide rails on the workbench, the bent part of the protection tube is located on the pressure measuring mechanism and is squeezed by the pressure mechanism; the utility model can perform a separate bending test and a pressure test on the protection tube, and at the same time, the utility model can test the pressure bearing capacity of the bent part of the protection tube through the cooperation of the two tests, and obtain a simulation situation when the protection tube is actually used, which is more in line with the use scenario of the protection tube and improves the accuracy of the test.

Description

Technical Field

[0001] The utility model relates to the technical field of protection tube testing equipment, in particular to a torsional pressure bearing strength testing equipment for processing an MPP cable protection tube. Background Art

[0002] Cable protection tube refers to a metal protection tube with a certain mechanical strength that is laid on the outer layer of the cable to prevent the cable from being damaged. Cable protection tubes are mainly installed in areas where communication cables and power lines intersect to prevent power lines from being disconnected and causing short circuit accidents, causing communication cables and wire ropes to be electrified, so as to protect cables, switches, movement boards, and even the entire machine from being burned out, and also play a certain role in isolating the magnetic field interference of power lines.

[0003] Existing cable protection tubes are generally buried underground, which can facilitate the threading of cables and protect the cables from pressure. During assembly and use, the cable protection tubes will encounter curved bends, where the cable protection tubes not only need to resist bending, but also need to resist the pressure caused by ground backfill. The existing testing equipment tests the cables as separate pressure tests or pull-up tests, which cannot cope with this special usage scenario and may cause misjudgment of the detection. It is impossible to test the compressive strength of the cable protection tube in special scenarios, affecting the final cable protection effect. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a torsional compressive strength testing device for processing an MPP cable protection tube to solve the problem that the compressive strength of the cable protection tube cannot be measured when it is bent.

[0005] Based on the technical problems existing in the background technology, the utility model proposes a torsional compressive strength testing equipment for MPP cable protection tube processing, including a workbench and two guide rails vertically distributed on the workbench, and tube clamping mechanisms for clamping the protective tube are slidably installed on the two guide rails. The two tube clamping mechanisms can be rotated to bend the protective tube, and a pressure measuring mechanism is installed on the workbench between the two guide rails. The bent part of the protective tube is located on the pressure measuring mechanism and is squeezed by the pressure mechanism.

[0006] Preferably, the tube clamping mechanism includes a moving platform, a turntable and a clamp, the moving platform is slidably mounted on a guide rail, the turntable is rotatably mounted on the moving platform, two clamps are slidably mounted on the turntable and can move closer to or farther from each other, and a driving mechanism connected to the turntable is installed on the workbench.

[0007] Preferably, the guide rail has bar-shaped ears on both sides, and rollers for clamping the bar-shaped ears are rotatably mounted on both sides of the movable platform.

[0008] Preferably, a guide rod perpendicular to the sliding direction of the mobile platform is installed on the mobile platform, and two limit blocks for limiting the sliding of the mobile platform are slidably installed on the guide rod. An elastic member is installed between the two limit blocks. The elastic member is sleeved on the guide rod and pushes the two limit blocks to be squeezed toward the guide rail.

[0009] Preferably, a strip groove is provided on the moving platform, and the limiting block passes through the strip groove and extends to the upper surface of the moving platform.

[0010] Preferably, a friction plate is installed on the limiting block, and the friction plate is located between the guide rail and the limiting plate.

[0011] Preferably, a distance measuring sensor is installed on the pressure mechanism, and the distance measuring sensor points to the pressure measuring mechanism.

[0012] Compared with the prior art, the torsional compressive strength testing equipment for MPP cable protection tube processing proposed in the utility model adopts the above technical solution and achieves the following technical effects:

[0013] The utility model can perform separate bending tests and pressure tests on the protective tube. At the same time, the utility model can test the pressure-bearing capacity of the bent part of the protective tube through the coordination of the two tests, and obtain a simulation of the actual use of the protective tube, which is more in line with the use scenario of the protective tube and improves the accuracy of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the no-load structure of the pipe clamping mechanism of the utility model;

[0016] Figure 3 This is a schematic diagram of the pipe clamping structure of the pipe clamping mechanism of the utility model;

[0017] Figure 4 This is a structural schematic diagram of the pipe clamping mechanism of the utility model installed on a guide rail.

[0018] In the figure: 1. workbench; 2. guide rail; 3. pipe clamping mechanism; 4. pressure measuring mechanism; 5. pressure mechanism; 31. moving table; 32. turntable; 33. fixture; 34. driving mechanism; 35. roller; 41. guide rod; 42. limit block; 43. elastic member; 311. strip groove; 421. friction plate; 51. distance measuring sensor. DETAILED DESCRIPTION

[0019] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0021] Example

[0022] Please refer to Figure 1-Figure 4 The utility model proposes a torsional pressure bearing strength testing device for processing MPP cable protection tubes, comprising a workbench 1, two guide rails 1 vertically distributed on the workbench 1, and tube clamping mechanisms 3 for clamping the protection tube are slidably installed on the two guide rails 1. The two tube clamping mechanisms 3 can rotate to bend the protection tube. A pressure measuring mechanism 4 is installed between the two guide rails 1 on the workbench 1, and the bending part of the protection tube is located on the pressure measuring mechanism 4 and squeezed by the pressure mechanism 5. In the utility model, the protection tube is clamped by two tube clamping mechanisms 3, and the tube clamping mechanism 3 slides on the guide rail 1 to change the position on the guide rail 1 so as to change the spacing between the two tube clamping mechanisms 3, reduce or expand the bending space of the protection tube, and the tube clamping mechanism 3 can rotate so that the openings at both ends of the tube clamping point to 90 degrees vertically. At this time, the protection tube is clamped in the middle at the bending part of the protection tube by the pressure mechanism 5 and the pressure measuring mechanism 4, and the pressure limit that the bending part of the protection tube can withstand is tested by continuously applying pressure;

[0023] In a specific implementation manner, refer to Figure 2 , Figure 3The pipe clamping mechanism 3 includes a moving platform 31, a rotating disk 32 and a clamp 33. The moving platform 31 is slidably mounted on the guide rail 1, the rotating disk 32 is rotatably mounted on the moving platform 31, and the two clamps 33 are slidably mounted on the rotating disk 32 and can move closer to or farther from each other. A driving mechanism 34 connected to the rotating disk 32 is mounted on the workbench 1. In the utility model, two raised guide plates are arranged on the rotating disk 32, and a round hole is opened on the guide plate. The clamp 33 includes a clamp plate and a guide column. The clamp plate is connected to the guide column, and the guide column slides relative to the guide plate through the round hole. A spring is installed between the clamp plate and the guide column, and the spring is in a compressed state. A protrusion is arranged on one of the clamp plates to facilitate the separation of the two clamp plates.

[0024] In a specific implementation manner, refer to Figure 2 , Figure 3 The guide rail 1 has bar ears on both sides, and rollers 35 for clamping the bar ears are rotatably installed on both sides of the moving platform 31. The bar ears on both sides of the guide rail 1 are parallel to the horizontal plane. The bar ears are clamped by two upper and lower rollers 35 on both sides of the moving platform 31. The moving platform 31 can reduce the friction between the guide rail 1 through the rollers 35 to facilitate sliding.

[0025] In a specific implementation manner, refer to Figure 2 , Figure 3 , Figure 4 , a guide rod 41 perpendicular to the sliding direction of the mobile platform 31 is installed on the mobile platform 31, and two limit blocks 42 for limiting the sliding of the mobile platform 31 are slidably installed on the guide rod 41, and an elastic member 43 is installed between the two limit blocks 42, and the elastic member 43 is sleeved on the guide rod 41 and pushes the two limit blocks 42 to squeeze the guide rail 1. In the utility model, the position of the mobile platform 31 needs to be fixed, and the two limit blocks 42 are slidably installed on the mobile platform 31, and the elastic member 43 is located between the two limit blocks 42, so that the limit blocks 42 will slide on both sides of the guide rail 1, and under the action of friction, the mobile platform 31 can be fixed on the guide rail 1 to avoid displacement and inaccurate testing; further, the limit of the mobile platform 31 can also be achieved by snap-fit ​​fixing.

[0026] In a specific implementation manner, refer to Figure 2 , Figure 3 , Figure 4 A strip groove 311 is provided on the movable platform 31, and the limit block 42 passes through the strip groove 311 and extends to the upper surface of the movable platform 31. The limit blocks 42 need to be manually kneaded to be close to each other so that the limit blocks 42 do not rub against the guide rail 1. At this time, the sliding of the limit block 42 requires a movable space. By providing the strip groove 311, the limit block 42 can have a movable space, so that the movable platform 31 can be separated from the guide rail 1.

[0027] In a specific implementation manner, refer to Figure 2 , Figure 3The limit block 42 is provided with a friction plate 421, and the friction plate 421 is located between the guide rail 1 and the limit plate. The friction plate 421 is used to increase the friction between the limit block 42 and the guide rail 1, so that the limit block 42 can better limit the movement of the moving platform 31.

[0028] In a specific implementation manner, refer to Figure 1 A distance sensor 51 is installed on the pressure mechanism 5, and the distance sensor 51 points to the pressure measuring mechanism 4. The distance sensor 51 is used to measure the distance change between the upper surface of the pressure measuring mechanism 4 and the lower surface of the pressure mechanism 5, and the data is compared with the diameter of the protection tube to obtain the compressive resistance of the bending part of the protection tube.

[0029] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A torsional compressive strength testing device for MPP cable protection tube processing, characterized in that: The invention comprises a workbench (1), two guide rails (2) vertically distributed on the workbench (1), a tube clamping mechanism (3) for clamping a protective tube being slidably mounted on the two guide rails (2), the two tube clamping mechanisms (3) being rotatable to bend the protective tube, a pressure measuring mechanism (4) being mounted between the two guide rails (2) on the workbench (1), the bent portion of the protective tube being located on the pressure measuring mechanism (4) and being pressed by a pressure mechanism (5).

2. The torsional compressive strength testing equipment for MPP cable protection tube processing according to claim 1 is characterized in that: The pipe clamping mechanism (3) comprises a moving platform (31), a rotating disk (32) and a clamp (33); the moving platform (31) is slidably mounted on a guide rail (2); the rotating disk (32) is rotatably mounted on the moving platform (31); two clamps (33) are slidably mounted on the rotating disk (32) and can move closer to or farther from each other; and a driving mechanism (34) connected to the rotating disk (32) is mounted on the workbench (1).

3. The torsional compressive strength testing equipment for MPP cable protection tube processing according to claim 2 is characterized in that: The guide rail (2) has strip-shaped ears (21) on both sides, and rollers (35) for clamping the strip-shaped ears (21) are rotatably mounted on both sides of the moving platform (31).

4. The torsional compressive strength testing equipment for MPP cable protection tube processing according to claim 2 is characterized in that: The movable platform (31) is provided with a guide rod (41) perpendicular to the sliding direction of the movable platform (31), and two limit blocks (42) for limiting the sliding of the movable platform (31) are slidably provided on the guide rod (41), and an elastic member (43) is provided between the two limit blocks (42), and the elastic member (43) is sleeved on the guide rod (41) and pushes the two limit blocks (42) to be squeezed toward the guide rail (2).

5. The torsional compressive strength testing equipment for MPP cable protection tube processing according to claim 4 is characterized in that: The movable platform (31) is provided with a strip groove (311), and the limit block (42) passes through the strip groove and extends to the upper surface of the movable platform (31).

6. The torsional compressive strength testing equipment for MPP cable protection tube processing according to claim 4 is characterized in that: A friction plate (421) is mounted on the limiting block (42), and the friction plate (421) is located between the guide rail (2) and the limiting plate.

7. The torsional compressive strength testing equipment for MPP cable protection tube processing according to claim 1 is characterized in that: A distance measuring sensor (51) is installed on the pressure mechanism (5), and the distance measuring sensor (51) points to the pressure measuring mechanism (4).

Images