Clamping mechanism for impact resistance test of power cable protection pipe

Abstract

The utility model discloses a clamping mechanism for an impact resistance test of a power cable protection tube, and relates to the technical field of power cables. The device comprises a base, bosses, side baffles and an end plate, the two symmetrical bosses are arranged above the base in a sliding mode, vertical plates and a square frame are fixed to the upper ends of the bosses, the four corners of the square frame are chamfered, a bolt is connected to each chamfer of the square frame in a penetrating and threaded mode, and the tail end of each bolt extends into an inner cavity of the square frame and is rotationally connected with a first arc plate; inner cylinders are fixed to the sides, close to the square frame, of the vertical plates, second arc plates are fixed to the ends, located on the outer sides of the inner cylinders, of the square rods, and abutting blocks are fixed to the ends, located on the inner sides of the inner cylinders, of the square rods. Through the arrangement of the boss, the vertical plate, the square frame, the first arc plate, the second arc plate, the side baffle, the end plate and the base, the problems that a conventional clamping mechanism cannot stably clamp the end of a power cable protection pipe, and the clamping mechanism cannot assist in carrying out impact and pressure tests from the upper portion are solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the related technical field of power cable, especially, relate to a clamping mechanism of power cable protection pipe impact test. BACKGROUND

[0002] Power cable protection pipe is also called cable pipe, power pipe and the like, mainly installed in the ground section where communication cable and power line cross, can prevent power line from breaking and causing short circuit accident, avoid communication cable and steel wire rope from being electrified, protect cable, switch, core board and even whole machine from being burnt, and can also isolate power line magnetic field interference. Common power cable protection pipes include glass steel power cable protection pipe, CPVC buried high-voltage power cable protection pipe and MPP power pipe. These power cable protection pipes need to be tested for impact resistance after production, and can be sold after meeting the requirements. When testing for impact resistance, the two ends of the power cable protection pipe need to be clamped to ensure stability, but it still has the following problems in actual testing:

[0003] For example, the utility model patent with application number 202220785398.4 clamps and fixes the power cable protection pipe by the arc surface between the two clamping plates, which can clamp power cable protection pipes of different diameters, but there is still a risk of falling off during impact resistance testing, and the clamping is not stable enough, and the clamping cannot be too tight (easy to cause deformation of the power cable protection pipe), so a more stable clamping mechanism is needed for clamping.

[0004] Secondly, after clamping the power cable protection pipe for impact resistance testing, this kind of test is mostly impact resistance testing from the side, but many power cable protection pipes are buried underground, lacking impact and pressure testing from the ground, that is, lacking pressure testing from above the power cable protection pipe. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a clamping mechanism for impact resistance testing of power cable protection pipe, which solves the problems of unstable clamping of the end of the power cable protection pipe by the conventional clamping mechanism and the inability of the clamping mechanism to assist in impact and pressure testing from above by setting the boss, vertical plate, square frame, arc plate one, arc plate two, side baffle, end plate and base.

[0006] To solve the above technical problems, the utility model is realized by the following technical scheme:

[0007] The utility model discloses a kind of clamping mechanisms for electric power cable protection pipe impact test, including base, boss, side baffle and end plate, two symmetrical bosses are slidably arranged on the top of base, the upper end of boss is fixed with vertical plate and square frame, and square frame is closer to base center, the four corners of square frame are chamfered, and each chamfer of square frame is connected with bolt in through thread, the tail end of bolt extends into the inner chamber of square frame and is rotatably connected with arc plate one.

[0008] The side of vertical plate close to square frame is fixed with inner cylinder, and the end of inner cylinder away from vertical plate extends into the inner chamber of square frame, the lateral side of inner cylinder is inserted with square rod in through thread, and the end of square rod outside inner cylinder is fixed with arc plate two, and the end of square rod inside inner cylinder is fixed with abutting block.

[0009] Further, the two ends of base are fixed with end head, the upper end height of end head is flush with the upper end height of boss, and the opposite surface of two end heads is fixed with two symmetrical slide rods, the lower part of boss is penetrated with through hole, and slide rod is inserted into through hole.

[0010] Further, screw rod is connected in through thread in vertical plate, and the end of screw rod close to square frame is fixed with conical head of circular platform, and the end of screw rod away from square frame is fixed with hand wheel.

[0011] Further, the side close to the central axis of inner cylinder of abutting block is attached with the outer curved surface of conical head, the lateral side of inner cylinder is penetrated with through groove in annular array, and the part of through groove is located outside square frame.

[0012] Further, the outer curved surface of arc plate one is also fixed with two symmetrical distribution limit rods, and the end of limit rod away from arc plate one is penetrated through the chamfer part of square frame and extends out.

[0013] Further, the two sides of square frame are fixed with convex block one, the two sides of boss are fixed with convex block two, the same side of two bosses is provided with side baffle, and the side close to boss of side baffle is provided with limit slot, and convex block one and convex block two are slidably arranged in limit slot.

[0014] Further, two end plates are arranged between two side baffles, slot is arranged in end plate for power cable protection pipe to pass through, and end plate is close to square frame and boss, and the end of power cable protection pipe is between arc plate one and arc plate two.

[0015] The utility model has the following beneficial effects:

[0016] The utility model discloses a setting boss, vertical board, square frame, arc plate no. 1, arc plate no. 2, solve the end of the conventional clamping mechanism of power cable protection pipe clamping not enough stable problem, when clamping installation of power cable protection pipe, its end is inserted between arc plate no. 1 and arc plate no. 2 on a boss, then rotates screw and makes the taper head close to the square frame direction, thereby make the outer curvature of taper head contact abutment block, make abutment block contact the surface of taper head of different position constantly, thereby make square bar and arc plate no. 2 move outward, until arc plate no. 2 abuts tightly the inner wall of power cable protection pipe, then, rotate the bolt of square frame each chamfer part, and the bolt is spun into the inside of square frame, until make arc plate no. 1 clamp the outer wall of power cable protection pipe, in this process because arc plate no. 1 and bolt are rotationally connected, and then cooperate the location of limiting rod, make arc plate no. 1 not rotate, finally realize the synchronous clamping of the inner and outer wall of power cable protection pipe, neither cause clamping deformation, and also guarantee enough clamping force, enough stable after impact test.

[0017] The utility model discloses a setting side baffle, end plate, boss, base solves the problem that clamping mechanism cannot assist from the impact and pressure test of above, before clamping power cable protection pipe, first the end plate is set in the power cable protection pipe outer end part, then it is close -fitted in the square frame end face, again the side baffle is inserted in the side of square frame and boss can, at this time, the end plate and side baffle bottom surface contact base, two end plates, two side baffles and base form the structure of five -sided enclosure, at this time, whether it is directly in the power cable protection pipe above impact and pressure test, or to the power cable protection pipe outer filling soil, simulation buried environment and then carry out pressure test can. ACCURACY OF DRAWINGS

[0018] In order to make the technical scheme of the embodiments of the utility model clearer, the following will briefly introduce the drawing needed to be used for the embodiment description.

[0019] Figure 1 It is a kind of power cable protection pipe anti-impact test clamping mechanism's perspective view;

[0020] Figure 2 It is the structure diagram after removing side baffle and end plate;

[0021] Figure 3 It is the connection diagram of base and single boss;

[0022] Figure 4 It is the structure diagram of base;

[0023] Figure 5 It is the structure diagram of boss;

[0024] Figure 6 It is the structure diagram of square frame;

[0025] Figure 7It is the connection diagram of the bolt and the arc plate one;

[0026] Figure 8 It is the structure diagram after the vertical plate and the inner cylinder are cut open;

[0027] Figure 9 It is the connection diagram of the inner cylinder and the vertical plate;

[0028] Figure 10 It is the connection diagram of the square rod and the arc plate two.

[0029] Reference signs:

[0030] 1, base; 101, end; 102, slide rod; 2, boss; 201, vertical plate; 202, square frame; 2021, protruding block one; 2022, bolt; 2023, limiting rod; 2024, arc plate one; 203, inner cylinder; 2031, arc plate two; 2032, square rod; 2033, abutting block; 2034, through slot; 204, screw rod; 2041, hand wheel; 2042, taper head; 205, protruding block two; 206, through hole; 3, side baffle; 301, limiting groove; 4, end plate. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model.

[0032] Please refer to Figures 1-10 The utility model discloses a kind of clamping mechanisms for impact test of electric power cable protection pipe, including base 1, boss 2, side baffle 3 and end plate 4, two symmetrical bosses 2 are slidably arranged on the top of base 1, the upper end of boss 2 is fixed with vertical plate 201 and square frame 202, and square frame 202 is closer to the center of base 1, square frame 202 is chamfered at four corners, and each chamfer of square frame 202 is connected with bolt 2022 in through thread, the tail end of bolt 2022 extends into the inner cavity of square frame 202 and is rotatably connected with arc plate one 2024;

[0033] Two bosses 2 and the structure above it are used to clamp and fix the two ends of electric power cable protection pipe, boss 2 can slide on base 1, so that it is convenient to adjust clamping position according to the length of electric power cable protection pipe, boss 2 is fixed with square frame 202 and vertical plate 201 as carrier, chamfer on square frame 202 is connected with bolt 2022, and rotating bolt 2022 makes arc plate one 2024 close to the outer wall of electric power cable protection pipe, to clamp and process the outer wall of electric power cable protection pipe;

[0034] The inner cylinder 203 is fixed to one side of the vertical plate 201 close to the square frame 202, and the end of the inner cylinder 203 away from the vertical plate 201 extends into the inner cavity of the square frame 202. The circumferential side of the inner cylinder 203 located in the square frame 202 is inserted with square rods 2032 arranged in a ring array in a through manner, and one end of the square rod 2032 located outside the inner cylinder 203 is fixed with an arc plate two 2031, and one end of the square rod 2032 located inside the inner cylinder 203 is fixed with an abutting block 2033;

[0035] The screw rod 204 is threadedly connected in a through manner in the vertical plate 201, and the end of the screw rod 204 close to the square frame 202 is fixed with a circular truncated cone-shaped taper head 2042, and the end of the screw rod 204 away from the square frame 202 is fixed with a hand wheel 2041;

[0036] When the screw rod 204 is rotated by the hand wheel 2041, the taper head 2042 approaches the square frame 202, so that the outer curved surface of the taper head 2042 contacts the abutting block 2033, and the taper head 2042 is continuously moved, so that the abutting block 2033 contacts the surface of the taper head 2042 at different positions, thereby moving the square rod 2032 and the arc plate two 2031 outward until the arc plate two 2031 abuts against the inner wall of the power cable protection pipe, and the clamping of the inner wall of the power cable protection pipe is completed.

[0037] The base 1 is fixed with end heads 101 at both ends, the upper end height of the end head 101 is flush with the upper end height of the boss 2, and two symmetrical slide rods 102 are fixed on the opposite faces of the two end heads 101. The boss 2 is provided with through holes 206 distributed in a symmetrical manner in the lower part, and the slide rods 102 are inserted into the through holes 206.

[0038] The end head 101 is higher than the rear base 1, the slide rod 102 is installed by using the end head 101, and the through hole 206 in the boss 2 is arranged in cooperation, so that the slide rod 102 is inserted into the through hole 206, the position of the boss 2 can be moved horizontally, the boss 2 can be adapted to the length of the power cable protection pipe, and the position of the boss 2 is stable and cannot be deviated laterally.

[0039] The abutting block 2033 is attached to one side of the inner cylinder 203 close to the central axis, and the outer curved surface of the taper head 2042 is attached to the abutting block 2033; the circumferential side of the inner cylinder 203 is provided with through grooves 2034 arranged in a ring array, and part of the through grooves 2034 is located outside the square frame 202;

[0040] The through grooves 2034 are arranged to facilitate observation of the positions of the screw rod 204 and the taper head 2042 in the inner cylinder 203, the abutting block 2033 contacts different positions of the taper head 2042, and the positions of the square rod 2032 and the arc block two can be changed.

[0041] The outer arc surface of the arc plate one 2024 is further fixed with two symmetrical limiting rods 2023, and one end of the limiting rod 2023 away from the arc plate one 2024 extends out of the chamfered portion of the square frame 202.

[0042] Because the arc plate 2024 is in rotational connection with the bolt 2022, and the limiting of the limiting rod 2023 is matched, when the bolt 2022 rotates, the arc plate 2024 will not rotate.

[0043] The two sides of the frame 202 are fixed with the protrusions 2021, the two sides of the protrusions 2 are fixed with the protrusions 205, the same sides of the two protrusions 2 are provided with the side baffles 3, one side of the side baffles 3 close to the protrusions 2 is provided with the limiting grooves 301, and the protrusions 2021 and the protrusions 205 are slidingly arranged in the limiting grooves 301.

[0044] Two end plates 4 are further arranged between the two side baffles 3, the end plates 4 are provided with the slots for the power cable protection pipe to pass through, and the end plates 4 are close to the frame 202 and the protrusions 2, and the end part of the power cable protection pipe is between the arc plate 2024 and the arc plate 2031.

[0045] Before clamping the power cable protection pipe, the end plate 4 is sleeved on the outer end part of the power cable protection pipe, then the end plate 4 is close to the end surface of the frame 202, then the side baffles 3 are inserted into the protrusions 2021 and the protrusions 205 on the side of the frame 202 and the protrusions 2 through the limiting grooves 301, at this time, the side baffles 3 are stably connected with the frame 202 and the protrusions 2, the end plate 4 and the bottom surface of the side baffles 3 contact the base 1, and the two end plates 4, the two side baffles 3 and the base 1 form a five-sided surrounding structure, and the compression test on the upper side can be carried out.

[0046] The specific working principle of the utility model is: firstly, before clamping the power cable protection tube, first of all, the end plate 4 is set in the outer end part of the power cable protection tube, at this time, the end part is inserted between the arc plate one 2024 and the arc plate two 2031 on the boss 2, then the screw rod 204 is rotated to make the taper head 2042 close to the square frame 202 direction, so that the outer curved surface of the taper head 2042 contacts the abutment block 2033, the taper head 2042 is continuously moved, the abutment block 2033 contacts the surface of the taper head 2042 in different positions, so that the square rod 2032 and the arc plate two 2031 move outward, until the arc plate two 2031 abuts against the inner wall of the power cable protection tube, then the bolt 2022 of each chamfer part of the square frame 202 is rotated, the bolt 2022 is screwed into the square frame 202, until the arc plate one 2024 clamps the outer wall of the power cable protection tube, finally the synchronous clamping of the inner and outer walls of the power cable protection tube is realized, then the through hole 206 in the boss 2 is inserted into the slide rod 102, and the base 1 forms the opposite sliding connection, then according to the length of the power cable protection tube, the other end part is matched with the structure on the other boss 2 to clamp, finally, the end plate 4 is moved to be closely attached to the end face of the square frame 202, then the side baffle 3 is inserted into the convex block one 2021 and the convex block two 205 outside the side face of the square frame 202 and the boss 2 through the limiting slot 301, at this time, the side baffle 3 is stably connected with the boss 2 and the square frame 202, the bottom surface of the end plate 4 and the side baffle 3 contacts the base 1, the two end plates 4, the two side baffles 3 and the base 1 form the structure surrounded by five surfaces, the soil is filled outside the power cable protection tube, the pressure test is carried out again in the simulated buried environment.

[0047] The above is only the preferred embodiment of the utility model, and does not limit the utility model, any modification, equivalent replacement, improvement to the technical scheme recorded in the foregoing embodiments, belongs to the protection scope of the utility model.

Claims

1. A clamping mechanism for impact test of power cable protection pipe, comprising a base (1), a boss (2), a side baffle (3) and an end plate (4), characterized in that: The base (1) is provided with two symmetrical bosses (2) sliding above the base (1), the upper end of the boss (2) is fixed with a vertical plate (201) and a square frame (202), and the square frame (202) is closer to the center of the base (1), the four corners of the square frame (202) are chamfered, and each chamfer of the square frame (202) is through-threadedly connected with a bolt (2022), the tail end of the bolt (2022) extends into the inner cavity of the square frame (202) and is rotatably connected with an arc plate one (2024). The side of the vertical plate (201) close to the square frame (202) is fixed with an inner cylinder (203), and the end of the inner cylinder (203) away from the vertical plate (201) extends into the inner cavity of the square frame (202), the circumferential side of the inner cylinder (203) located in the inner part of the square frame (202) is through-inserted with square rods (2032) arranged in an annular array, and the end of the square rod (2032) located outside the inner cylinder (203) is fixed with an arc plate two (2031), and the end of the square rod (2032) located inside the inner cylinder (203) is fixed with an abutting block (2033).

2. A clamping mechanism for impact testing of power cable protection pipes according to claim 1, characterized in that: The base (1) is fixed with end heads (101) at both ends, the upper end height of the end head (101) is flush with the upper end height of the boss (2), and the opposite faces of the two end heads (101) are both fixed with two symmetrical slide rods (102), the lower part of the boss (2) is through-opened with symmetrically distributed through holes (206), and the slide rods (102) are inserted into the through holes (206).

3. A clamping mechanism for impact testing of power cable protection pipes according to claim 1, characterized in that: The inner cylinder (203) is through-threadedly connected with a screw rod (204), and the end of the screw rod (204) close to the square frame (202) is fixed with a conical head (2042), and the end of the screw rod (204) away from the square frame (202) is fixed with a hand wheel (2041).

4. A clamping mechanism for impact testing of a power cable protection tube according to claim 3, characterized in that: The side of the abutting block (2033) close to the central axis of the inner cylinder (203) is attached to the outer curved surface of the conical head (2042); the circumferential side of the inner cylinder (203) is through-opened with through grooves (2034) arranged in an annular array, and the through grooves (2034) are partially located outside the square frame (202).

5. The impact test holding mechanism for power cable protection pipes according to claim 1, characterized in that: The outer curved surface of the arc plate one (2024) is further fixed with two symmetrically distributed limiting rods (2023), and the end of the limiting rod (2023) away from the arc plate one (2024) penetrates the chamfered part of the square frame (202) and extends out.

6. A clamping mechanism for impact testing of power cable protection pipes according to claim 1, characterized in that: The two sides of the square frame (202) are both fixed with protruding blocks one (2021), the two sides of the boss (2) are both fixed with protruding blocks two (205), the same sides of the two bosses (2) are both provided with side baffle plates (3), the side of the side baffle plate (3) close to the boss (2) is opened with a limiting groove (301), and the protruding blocks one (2021) and the protruding blocks two (205) are both slidingly arranged in the limiting groove (301).

7. A clamping mechanism for impact testing of a power cable protection tube according to claim 6, characterized in that: Two end plates (4) are further arranged between the two side baffle plates (3), the end plate (4) is provided with a slot for the power cable protection tube to pass through, and the end plate (4) is close to the square frame (202) and the boss (2), and the end of the power cable protection tube is between the arc plate one (2024) and the arc plate two (2031).

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