A performance detection device for cable protection pipe

Abstract

The application discloses a performance detection device for a cable protection pipe and belongs to the field of cable protection pipe detection. The device comprises a box body, a to-be-detected protection pipe is installed in the box body, a hydraulic rod is fixedly connected to the top wall of the box body, and the output end of the hydraulic rod is fixedly connected with an N-shaped block. The middle part of the N-shaped block is slidably connected with a pressing block, the middle part of the pressing block is linearly arrayed and slidably connected with a plurality of first annular cylinders, the middle part of each of the plurality of first annular cylinders is slidably connected with a second annular cylinder, and the middle part of each of the plurality of second annular cylinders is slidably connected with a cylinder. When the output force of the hydraulic rod is unchanged, the pressing block, the first annular cylinder and the second annular cylinder are sequentially moved upwards on the N-shaped block, so that the pressure intensity borne by the to-be-detected protection pipe is gradually increased. The device can change the stress area of the protection pipe to change the pressure intensity when the fixed output pressure is maintained, simulates the pressure exerted by stratum sand and stones on the protection pipe, and provides a reliable basis for quality control and engineering application of the cable protection pipe.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cable protection pipe detection, in particular to a performance detection device for a cable protection pipe. BACKGROUND

[0002] In the field of power transmission and communication, cable protection pipes play an important role in protecting cables from mechanical damage, chemical corrosion and environmental erosion. The performance of the cable protection pipe directly affects the safe and stable operation of the cable system. Therefore, it is particularly important to accurately and comprehensively detect the performance of the cable protection pipe. The compression resistance performance, as a key indicator of the ability of the cable protection pipe to resist external pressure in actual use, is one of the key contents of the detection work.

[0003] Currently, traditional cable protection pipe compression resistance performance detection devices mostly use a fixed pressure area and constant pressure method to detect the protection pipe. However, in actual application scenarios, when the cable protection pipe is buried underground, the ground is subjected to vehicle crushing, heavy object accumulation, etc. The pressure area and pressure of sand and other objects in the stratum on the protection pipe are dynamically changing. The existing detection method cannot truly simulate this complex actual stress condition, resulting in a large deviation between the detection results and the compression resistance performance of the protection pipe in actual use, making it difficult to accurately evaluate the compression resistance of the protection pipe in the real environment, and thus unable to provide reliable basis for quality control and engineering application of the cable protection pipe. SUMMARY

[0004] The purpose of the present application is to provide a performance detection device for a cable protection pipe, which solves the problem of large deviation between the detection results and the compression resistance performance of the protection pipe in actual use.

[0005] To achieve the above purpose, the present application provides the following technical solution: a performance detection device for a cable protection pipe, comprising a box body, a protection pipe to be detected is installed in the box body, a hydraulic rod is fixedly connected to the top wall of the box body, the output end of the hydraulic rod is fixedly connected with an N-shaped block, the two vertical parts of the N-shaped block are used for limiting the protection pipe to be detected;

[0006] A pressure block is slidably connected to the middle part of the N-shaped block, a plurality of first annular cylinders are linearly arrayed and slidably connected to the middle part of the pressure block, a plurality of second annular cylinders are slidably connected to the middle part of each of the first annular cylinders, a plurality of cylinders are slidably connected to the middle part of each of the second annular cylinders, and the plurality of cylinders are fixedly connected to the N-shaped block. The hydraulic rod applies a constant driving force to the pressure block through the N-shaped block. When the output force of the hydraulic rod remains unchanged, the pressure block, the first annular cylinder and the second annular cylinder are sequentially moved up in the N-shaped block, thereby gradually increasing the pressure intensity of the protection pipe to be detected.

[0007] Preferably, the bottom wall of the box is hinged with a mounting seat, a through hole for inserting a protective tube is formed in the mounting seat, and a clamping cylinder coaxial with the through hole and a sealing cylinder are connected to the two sides of the mounting seat respectively.

[0008] Preferably, a sealing cone is slidably connected in the sealing cylinder, a threaded cylinder is fixedly connected coaxially on the sealing cone, a hole communicating with the threaded cylinder is formed in the middle of the sealing cone, and a threaded ring is rotatably connected on the mounting seat and threadedly connected with the threaded cylinder.

[0009] Preferably, a hose is connected through the side wall of the box and communicates with the threaded cylinder.

[0010] Preferably, a key is fixedly connected on the side wall of the sealing cone, and a sliding groove matched with the key is formed in the inner wall of the sealing cylinder.

[0011] Preferably, a first sliding rod is fixedly connected on the pressing block, a second sliding rod is fixedly connected on the first annular cylinder, a third sliding rod is fixedly connected on the second annular cylinder, and a sliding hole matched with the first sliding rod, the second sliding rod and the third sliding rod is formed in the N-shaped block.

[0012] Preferably, a piston cylinder is fixedly connected on the outer wall of the box, a piston rod is slidably connected in the piston cylinder, a first pipeline is connected between the sliding hole of the first sliding rod and the piston cylinder, a second pipeline is connected between the sliding hole of the second sliding rod and the piston cylinder, and a third pipeline is connected between the sliding hole of the third sliding rod and the piston cylinder.

[0013] The piston rod can be communicated with the first pipeline, the second pipeline and the third pipeline in sequence when sliding away from the piston cylinder.

[0014] Preferably, the box is filled with water, a plurality of rectangular cylinders are connected through the side wall of the box, a rectangular plate is slidably connected in each of the rectangular cylinders, and a spring is connected between the rectangular plate and the end of the rectangular cylinder.

[0015] A detection rod is fixedly connected on the rectangular plate, a displacement sensor is arranged on the detection rod, the spring presses the rectangular plate when the protective tube is damaged, so that the water in the box flows into the detection protective tube, and the sliding speed of the detection rod is fast when the damage degree of the detection protective tube is high.

[0016] Preferably, the rectangular cylinder is fixedly connected with a support, the support is fixedly connected with a control rod, the end of the control rod is fixedly connected with the piston rod, the control rod is provided with anti-skid lines on the plurality of detection rods, and the lower surface of the control rod is provided with a groove.

[0017] Preferably, the support is fixedly connected with a motor, the output end of the motor is fixedly connected with a gear, and the control rod is provided with gear teeth engaged with the gear.

[0018] Compared with the prior art, the present application has the following advantages:

[0019] In the present application, the cable protection pipe is installed in the box, the hydraulic rod is started, and the N-shaped block is lowered. In the initial state, the pressing block, the first annular cylinder, the second annular cylinder and the bottom end of the cylinder are on the same plane, all in contact with the protection pipe and pressing the protection pipe. The output force of the hydraulic rod is unchanged. First, the pressing block is controlled to move upward relative to the N-shaped block. At this time, only the first annular cylinder, the second annular cylinder and the bottom end of the cylinder exert pressure on the protection pipe, and the two vertical parts of the N-shaped block can limit the protection pipe, ensuring that the protection pipe can still be in contact with the pressure object when the subsequent pressure area is reduced. Then, the first annular cylinder is controlled to move upward. At this time, only the second annular cylinder and the bottom end of the cylinder are in contact with the protection pipe. Finally, the first annular cylinder is controlled to move upward. At this time, only the cylinder is in contact with the protection pipe. By continuously reducing the area of the protection pipe and not changing the output pressure of the hydraulic rod, the pressure exerted by the sand and stone in the stratum on the protection pipe when the ground is crushed can be simulated when the protection pipe is buried underground, thereby facilitating the determination of the actual compression performance of the protection pipe in use. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0021] Figure 2 It is a sectional view of the present application;

[0022] Figure 3 It is a schematic diagram of the structure at the mounting seat of the present application;

[0023] Figure 4 It is a sectional view of the N-shaped block of the present application;

[0024] Figure 5 It is a schematic diagram of the structure at the first annular cylinder of the present application;

[0025] Figure 6 It is a schematic diagram of the structure at the rectangular plate of the present application;

[0026] Figure 7 It is a schematic diagram of the structure at the piston rod of the present application.

[0027] In the figure: 100, box; 110, mounting seat; 120, clamping cylinder; 130, sealing cylinder; 140, sealing cone; 141, key; 150, threaded cylinder; 160, threaded ring; 170, hose; 200, hydraulic rod; 210, N-shaped block; 220, pressing block; 221, first sliding rod; 222, first pipe; 230, first annular cylinder; 231, second sliding rod; 232, second pipe; 240, second annular cylinder; 241, third sliding rod; 242, third pipe; 250, cylinder; 300, rectangular cylinder; 310, rectangular plate; 320, detection rod; 330, spring; 340, piston cylinder; 350, piston rod; 360, control rod; 361, groove; 370, gear; 380, motor; 390, bracket. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0029] Referring to Figures 1-7 The present embodiment provides a technical solution: a performance detection device for cable protection pipe, comprising a box 100, the detection pipe to be installed in the box 100, the top wall of the box 100 is fixedly connected with a hydraulic rod 200, the output end of the hydraulic rod 200 is fixedly connected with an N-shaped block 210, the two vertical parts of the N-shaped block 210 are used for limiting the detection pipe to be detected; the middle part of the N-shaped block 210 is slidably connected with a pressing block 220, the middle part of the pressing block 220 is linearly arrayed and slidably connected with a plurality of first annular cylinders 230, the middle part of each of the plurality of first annular cylinders 230 is slidably connected with a second annular cylinder 240, the middle part of each of the plurality of second annular cylinders 240 is slidably connected with a cylinder 250, and the plurality of cylinders 250 are fixedly connected to the N-shaped block 210; the hydraulic rod 200 applies a constant driving force to the pressing block 220 through the N-shaped block 210, and when the output force of the hydraulic rod 200 is unchanged, the pressing block 220, the first annular cylinder 230 and the second annular cylinder 240 are sequentially moved up on the N-shaped block 210, thereby gradually increasing the pressure intensity of the detection pipe to be detected.

[0030] When the strength of the cable sheath is detected, the cable sheath is installed in the box 100, the hydraulic rod 200 is started, and the N-shaped block 210 is lowered. In the initial state, the pressing block 220, the first annular cylinder 230, the second annular cylinder 240 and the bottom end of the cylinder 250 are on the same plane, and all contact and press the sheath. The output force of the hydraulic rod 200 is controlled to be constant. First, the pressing block 220 is controlled to move upward relative to the N-shaped block 210. At this time, only the bottom end of the first annular cylinder 230, the second annular cylinder 240 and the cylinder 250 applies pressure to the sheath, and the two vertical parts of the N-shaped block 210 can limit the sheath to ensure that the subsequent pressure area is reduced and still in contact with the pressure object.

[0031] Then control the first annular cylinder 230 to move upward. At this time, only the second annular cylinder 240 and the bottom end of the cylinder 250 are in contact with the sheath. Finally, control the first annular cylinder 230 to move upward. At this time, only the cylinder 250 is in contact with the sheath. By continuously reducing the size of the pressure area on the sheath and not changing the output pressure of the hydraulic rod 200, the pressure of the earth layer on the sheath when the ground is crushed can be simulated when the sheath is buried underground. Thus, the compression resistance of the sheath in actual use can be obtained.

[0032] The bottom wall of the box 100 is hinged with a mounting seat 110, and a through hole for inserting the sheath is formed in the mounting seat 110. The mounting seat 110 is connected with a clamping cylinder 120 and a sealing cylinder 130 coaxially with the through hole on both sides.

[0033] Box doors are arranged on any side wall of the box 100. The sheath to be detected is installed by opening the box door. The two ends of the sheath to be detected are inserted into the clamping cylinder 120 on the two mounting seats 110. The clamping cylinder 120 can be provided with a structure similar to a three-jaw chuck to clamp the sheath, or a nut is used to penetrate the clamping cylinder 120 to fix the sheath on the clamping cylinder 120. The sealing cylinder 130 is used to block the two ends of the sheath, so that the internal space of the sheath is not communicated with the internal space of the box 100.

[0034] The bottom of the mounting seat 110 is hinged with the bottom wall of the box 100 through a hinge seat, so that the mounting seat 110 can swing slightly when the sheath is pressed, simulating the change of the sheath after being pressed after being buried.

[0035] A sealing cone 140 is slidably connected in the sealing cylinder 130. A threaded cylinder 150 is fixedly connected coaxially on the sealing cone 140. A hole is formed in the middle of the sealing cone 140 and communicates with the threaded cylinder 150. A threaded ring 160 is rotatably connected on the mounting seat 110, and the threaded ring 160 is threadedly connected with the threaded cylinder 150.

[0036] The mounting seat 110 is further connected with a mounting rack, the threaded ring 160 is rotationally connected with the mounting rack, a knob for controlling the rotation of the threaded ring 160 is arranged on the outer wall of the threaded ring 160, the threaded cylinder 150 can axially slide in the sealing cylinder 130 by rotating the threaded ring 160, so that the sealing cone 140 can be inserted into the end of the protection pipe, the end of the protection pipe is polished flat, and the conical surface of the sealing cone 140 is tightly attached to the inner wall of the end of the protection pipe after the sealing cone 140 is inserted into the end of the protection pipe, so that the end of the protection pipe is blocked.

[0037] The side wall of the box body 100 is connected with a hose 170 in a penetrating manner, and the hose 170 is communicated with the threaded cylinder 150.

[0038] The hose 170 is communicated with the threaded cylinder 150, so that the internal space of the protection pipe can be communicated with the external space of the box body 100 through the hose 170, and it is ensured that the detection will not be disturbed due to the internal pressure when the protection pipe is under pressure.

[0039] The side wall of the sealing cone 140 is fixedly connected with a key 141, and the inner wall of the sealing cylinder 130 is provided with a sliding groove matched with the key 141.

[0040] The key 141 arranged on the sealing cone 140 can drive the threaded cylinder 150 to axially slide when the threaded ring 160 rotates, and the threaded cylinder 150 will not rotate with the threaded ring 160, so that it is ensured that the sealing cone 140 can stably approach the protection pipe.

[0041] The first sliding rod 221 is fixedly connected to the pressing block 220, the second sliding rod 231 is fixedly connected to the first annular cylinder 230, the third sliding rod 241 is fixedly connected to the second annular cylinder 240, and the sliding hole matched with the first sliding rod 221, the second sliding rod 231 and the third sliding rod 241 is arranged in the N-shaped block 210.

[0042] The arrangement of the sliding rods limits the sliding directions of the pressing block 220, the first annular cylinder 230 and the second annular cylinder 240, so that the pressing block 220, the first annular cylinder 230 and the second annular cylinder 240 can only move vertically to approach or move away from the protection pipe to be detected.

[0043] The outer wall of the box body 100 is fixedly connected with a piston cylinder 340, the piston rod 350 is slidably connected in the piston cylinder 340, the first pipe 222 is communicated between the sliding hole of the first sliding rod 221 and the piston cylinder 340, the second pipe 232 is communicated between the sliding hole of the second sliding rod 231 and the piston cylinder 340, and the third pipe 242 is communicated between the sliding hole of the third sliding rod 241 and the piston cylinder 340; the piston rod 350 can be sequentially communicated with the first pipe 222, the second pipe 232 and the third pipe 242 when sliding away from the piston cylinder 340.

[0044] Referring to Figure 6 and Figure 7, the piston rod 350 has sufficient length, the first pipe 222 is communicated with the end of the piston cylinder 340, in the initial state, the side wall of the piston rod 350 does not block the connection part of the first pipe 222 and the piston cylinder 340, and the connection part of the second pipe 232 and the third pipe 242 and the piston cylinder 340 is blocked by the side wall of the piston rod 350 and is not communicated with the piston cylinder 340, with the piston rod 350 gradually sliding away from the piston cylinder 340, the medium in the sliding hole of the first sliding rod 221 is first extracted by the piston cylinder 340, at this time, the pressing block 220 is completely moved up, and the end of the piston rod 350 moves to the rear of the communication part of the second pipe 232 and the piston cylinder 340, at this time, the second pipe 232 is communicated with the piston cylinder 340, so that the medium in the sliding hole of the second sliding rod 231 is extracted when the piston rod 350 continues to slide, and so on, until only the cylinder 250 applies pressure to the protective tube;

[0045] The pressure intensity of the protective tube is gradually increased through the above-mentioned actions until the protective tube is damaged to obtain the pressure performance of the protective tube.

[0046] The box body 100 is filled with water, and a plurality of rectangular cylinders 300 are communicated on the side wall of the box body 100, a plurality of rectangular plates 310 are slidably connected in the plurality of rectangular cylinders 300, and springs 330 are connected between the rectangular plates 310 and the ends of the rectangular cylinders 300; the rectangular plate 310 is fixedly connected with a detection rod 320, and a displacement sensor is arranged on the detection rod 320; when the protective tube is damaged, the spring 330 exerts pressure on the rectangular plate 310, so that the water in the box body 100 flows into the detection protective tube, and when the damage degree of the detection protective tube is high, the sliding speed of the detection rod 320 is fast.

[0047] After the protective tube is installed in the box body 100, water is filled in the box body 100, and the box body 100 is sealed, because the space in the protective tube is not communicated with the box body 100, so at this time the water in the box body 100 cannot enter the protective tube, when the protective tube is pressed to detect, if the protective tube is damaged, the water in the box body 100 can flow into the protective tube, and the larger the damage of the protective tube, the faster the water flows into the protective tube, that is, the faster the sliding speed of the rectangular plate 310 in the rectangular cylinder 300, at this time the displacement sensor detects the sliding distance of the detection rod 320, the control system obtains the sliding distance of the detection rod 320 and calculates the sliding speed of the detection rod 320 according to the starting time of sliding and the corresponding time point after sliding, the damage degree of the protective tube is judged by the sliding speed, so that the performance of the protective tube is obtained.

[0048] The rectangular cylinder 300 is fixedly connected with a support 390, the support 390 is fixedly connected with a control rod 360, the end of the control rod 360 is fixedly connected with the piston rod 350, the control rod 360 and the plurality of detection rods 320 are both provided with anti-skid lines, the lower surface of the control rod 360 is provided with a groove 361, when the control rod 360 drives the piston rod 350 to slide synchronously, the groove 361 can be sequentially arranged on the upper part of the plurality of detection rods 320, so that the corresponding detection rod 320 is unlocked.

[0049] After each sliding of the control rod 360, the piston rod 350 can just stop blocking one of the pipes, and at this time, the groove 361 at the lower part of the control rod 360 is just arranged on the upper part of one of the detection rods 320, so that each time the pressure of the protective tube changes, only one of the rectangular plates 310 in the rectangular cylinder 300 is in a sliding preparation state, so that the control system can directly obtain the pressure of the protective tube after sampling different displacement sensors;

[0050] In addition, when the protective tube is damaged, the pressure of the protective tube can be changed to continue testing, and the resistance of the damaged protective tube during underground use can be obtained;

[0051] The anti-skid lines on the control rod 360 and the detection rod 320 are arranged to enable the control rod 360 to slide along the length direction of the control rod 360 relative to the detection rod 320, so that the working state of each rectangular cylinder 300 can be changed.

[0052] The support 390 is fixedly connected with a motor 380, the output end of the motor 380 is fixedly connected with a gear 370, and the control rod 360 is provided with gear teeth engaged with the gear 370.

[0053] The motor 380 has a self-locking function, when the motor 380 is started, the gear 370 is driven to rotate, so that the gear 370 drives the control rod 360 to slide.

[0054] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A performance testing device for cable protection pipes, comprising a box (100) in which a pipe to be tested is installed, characterized in that: The top wall of the box (100) is fixedly connected with a hydraulic rod (200), and the output end of the hydraulic rod (200) is fixedly connected with an N-shaped block (210), and the two vertical parts of the N-shaped block (210) are used for limiting the to-be-detected protective tube; The middle part of the N-shaped block (210) is slidably connected with a pressing block (220), the middle part of the pressing block (220) is linearly arrayed and slidably connected with a plurality of first annular cylinders (230), the middle part of each of the plurality of first annular cylinders (230) is slidably connected with a second annular cylinder (240), the middle part of each of the plurality of second annular cylinders (240) is slidably connected with a cylinder (250), and the plurality of cylinders (250) are fixedly connected to the N-shaped block (210), the hydraulic rod (200) applies a constant driving force to the pressing block (220) through the N-shaped block (210), and when the output force of the hydraulic rod (200) is unchanged, the pressing block (220), the first annular cylinder (230) and the second annular cylinder (240) are sequentially moved up on the N-shaped block (210), thereby gradually increasing the pressure intensity suffered by the to-be-detected protective tube; The pressing block (220) is fixedly connected with a first sliding rod (221), the first annular cylinder (230) is fixedly connected with a second sliding rod (231), the second annular cylinder (240) is fixedly connected with a third sliding rod (241), and the N-shaped block (210) is provided with sliding holes matched with the first sliding rod (221), the second sliding rod (231) and the third sliding rod (241); The outer wall of the box (100) is fixedly connected with a piston cylinder (340), the piston cylinder (340) is slidably connected with a piston rod (350), the sliding hole of the first sliding rod (221) is in communication with the piston cylinder (340), the sliding hole of the second sliding rod (231) is in communication with the piston cylinder (340), and the sliding hole of the third sliding rod (241) is in communication with the piston cylinder (340). When the piston rod (350) slides away from the piston cylinder (340), it can be in communication with the first pipe (222), the second pipe (232) and the third pipe (242) in sequence.

2. The performance detection device for cable protection pipe according to claim 1, characterized in that: The bottom wall of the box (100) is hingedly connected with a mounting seat (110), the mounting seat (110) is provided with a through hole for inserting a protective tube, and the two sides of the mounting seat (110) are respectively connected with a clamping cylinder (120) and a sealing cylinder (130) coaxial with the through hole.

3. The performance detection device for cable protection pipe according to claim 2, characterized in that: The sealing cylinder (130) is slidably connected with a sealing cone (140), the sealing cone (140) is coaxially and fixedly connected with a threaded cylinder (150), the middle part of the sealing cone (140) is provided with a hole in communication with the threaded cylinder (150), and the mounting seat (110) is rotatably connected with a threaded ring (160), and the threaded ring (160) is threadedly connected with the threaded cylinder (150).

4. The performance detection device for cable protection pipe according to claim 3, characterized in that: A hose (170) is connected through the side wall of the box (100) and communicates with the threaded cylinder (150).

5. The performance detection device for cable protection pipe according to claim 4, characterized in that: A key (141) is fixedly connected to the side wall of the sealing cone (140), and a sliding groove that cooperates with the key (141) is formed in the inner wall of the sealing cylinder (130).

6. The performance detection device for cable protection tube according to claim 1, characterized in that: The box (100) is filled with water, and a plurality of rectangular cylinders (300) are connected to the side wall of the box (100), and a rectangular plate (310) is slidably connected to each of the rectangular cylinders (300). A detection rod (320) is fixedly connected to the rectangular plate (310), and a displacement sensor is arranged on the detection rod (320). When the detection tube is damaged, the spring (330) exerts pressure on the rectangular plate (310) to make the water in the box (100) flow into the detection tube, and when the damage degree of the detection tube is high, the sliding speed of the detection rod (320) is fast.

7. The performance testing device for a cable protection tube according to claim 6, characterized in that: A support (390) is fixedly connected to the rectangular cylinder (300), a control rod (360) is fixedly connected to the support (390), the end of the control rod (360) is fixedly connected to the piston rod (350), and anti-slip patterns are arranged on the control rod (360) and the plurality of detection rods (320). A groove (361) is formed in the lower surface of the control rod (360). When the control rod (360) drives the piston rod (350) to slide synchronously, the groove (361) can be sequentially arranged on the upper portions of the plurality of detection rods (320) to unlock the corresponding detection rods (320).

8. The performance detection device for cable protection pipe according to claim 7, characterized in that: A motor (380) is fixedly connected to the support (390), a gear (370) is fixedly connected to the output end of the motor (380), and teeth are arranged on the control rod (360) and engaged with the gear (370).

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