Cable defect detection device

Abstract

The present invention relates to the technical field of cable detection, and in particular to a cable defect detection device, comprising a shell, a traveling mechanism and a winding mechanism; the shell is sleeved outside the cable and in rolling contact with the cable, and a flaw detector is provided at one end of the shell in the axial direction of the cable; the winding mechanism comprises a steel strand and two winding wheels; the two winding wheels are coaxial and spaced, both sleeved outside the cable, and both rotatably installed in the shell; one end of the steel strand is wound around one winding wheel, and the other end is spirally wound around the outside of the cable and then wound around another winding wheel, then wound out from the other winding wheel and returned from the shell to a winding wheel and connected to one end thereof; the traveling mechanism comprises a traveling wheel rotatably installed in the shell, the axis of the traveling wheel is perpendicular to the cable and meshes with the steel strand wound outside the cable, so as to drive the shell to move along the axial direction of the cable when rotating, the traveling wheel has no direct contact with the cable, the defects on the surface of the cable have little influence on the traveling wheel, and the movement of the traveling wheel is more stable.

Description

Technical Field

[0001] The present invention relates to the technical field of cable detection, and in particular to a cable defect detection device. Background Art

[0002] In the prior art, cable defect detection refers to the use of various detection technologies and methods to identify quality problems, damage or failures that may occur in the production, installation and use of cables. As a core component of the power and communication system, the defects of cables may lead to major safety accidents such as power outages, communication failures, equipment damage and even fires. Therefore, it is very important to conduct regular and effective detection of cables. Common detection methods include ultrasonic detection, infrared thermal imaging detection, electromagnetic induction detection, etc. For some cables that have been installed and used, during detection, detection equipment such as flaw detectors are usually installed on a walking mechanism that can move along the cable, and the cable is detected as the walking mechanism moves along the cable. The existing walking mechanism usually uses a walking wheel to abut against the cable and uses the friction between the walking wheel and the cable to rotate the walking wheel while moving. This movement method is easily affected by cable defects or dirt on its surface, which leads to unstable movement of the walking mechanism, thereby affecting the detection effect of the detection equipment on the cable. Summary of the invention

[0003] The invention provides a cable defect detection device to solve the problem that the travel mechanism of the existing detection device is unstable in moving along the cable when detecting the cable.

[0004] A cable defect detection device of the present invention adopts the following technical solution:

[0005] A cable defect detection device comprises a shell, a running mechanism and a winding mechanism; the shell is sleeved outside the cable and in rolling contact with the cable, and a flaw detector is arranged at one end of the shell in the axial direction of the cable; the winding mechanism comprises a first winding wheel, a second winding wheel and a steel strand; the first winding wheel and the second winding wheel are coaxially arranged, both sleeved outside the cable, and both rotatably installed in the shell; the first winding wheel and the second winding wheel are spaced apart in the axial direction of the cable, and the first winding wheel is located on the side of the second winding wheel away from the flaw detector; one end of the steel strand is wound around the first winding wheel, and the other end is spirally wound around the cable and then wound around the second winding wheel, and then the steel strand is wound from the second winding wheel. The cable is wound on the wheel and returns from the shell to the first winding wheel and is connected to one end thereof; the walking mechanism includes a walking wheel rotatably installed in the shell, the axis of the walking wheel is perpendicular to the cable and meshes with the steel strand wound outside the cable, so as to drive the shell to move axially along the cable when rotating; the walking wheel rotates at the same time as the first winding wheel and the second winding wheel rotate, so that the steel strand is wound off the first winding wheel, wound around the cable and then rolled onto the second winding wheel, and then wound off the second winding wheel and returned from the shell to the first winding wheel, and at the same time, the walking wheel drives the shell and the first winding wheel and the second winding wheel installed in the shell to move synchronously along the cable under the meshing with the steel strand.

[0006] The above scheme also includes:

[0007] The winding mechanism also includes a first driving member, and there are two first driving members; the first winding wheel and the second winding wheel have the same structure, both including a transmission part and a winding part, the transmission part and the winding part are coaxial, the winding part is used to wind the steel strand, and it is located on one side of the transmission part close to the part of the steel strand wound outside the cable; the transmission part is used to connect with the first driving member, and drive the winding part to rotate under the drive of the first driving member.

[0008] A pair of guide wheels are provided on the winding parts of the first winding wheel and the second winding wheel. The guide wheels are rotatably installed on the winding part and are perpendicular to the axis of the cable. The guide wheels on the second winding wheel guide the steel strands outside the cable to be wound around the winding part of the second winding wheel, and the guide wheels on the first winding wheel guide the steel strands to detach from the winding part of the first winding wheel and then be wound around the cable.

[0009] A brush is connected to the winding part of the first winding wheel, and the brush cleans the outer surface of the cable while rotating and moving with the first winding wheel.

[0010] A guide channel is arranged in the shell, and the guide channel is parallel to the cable. The steel strand separated from the second winding wheel returns to the first winding wheel through the guide channel.

[0011] A pair of guide wheels are provided at one end of the guide channel close to the second winding wheel. The two guide wheels are installed on the outer shell and rotate around an axis perpendicular to the cable. They are respectively located on both sides of the steel strand and abut against the steel strand. One of the guide wheels is connected to the second driving member, and the second driving member drives the guide wheel to rotate to assist the steel strand to detach from the second winding wheel and enter the guide channel.

[0012] The walking mechanism also includes a third driving member, and the third driving member is used for driving the walking wheel to rotate.

[0013] The running wheel is a turbine wheel, and tooth grooves are arranged on the outer peripheral surface of the turbine wheel, and the distance between two adjacent tooth grooves is the same as the pitch of the steel strands wound outside the cable.

[0014] The traveling wheel is a helical gear, and the tooth pitch of the helical gear is the same as the pitch of the steel strand wound outside the cable.

[0015] The first winding wheel and the second winding wheel are both split structures consisting of two parts, and the two parts of the shell, the first winding wheel and the second winding wheel are respectively sleeved on the cable and fixedly connected.

[0016] The beneficial effects of the present invention are as follows: 1. The cable defect detection device of the present invention winds the steel strands around the outside of the cable and engages with the travel wheels, so that the travel wheels drive the outer shell to move. The travel wheels are not in direct contact with the cable and will not slip due to dirt on the cable surface. Even if there are defects on the cable surface or local deformation of the cable, the impact on the travel wheels will be weakened by the steel strands that are wrapped around the outside of the cable, making the movement of the travel wheels more stable. 2. Because the steel strands are wrapped around the outside of the cable to guide the movement of the travel wheels, compared to the method of clamping the cable with two rollers and rotating and moving at the same time in the prior art, the cable is more evenly stressed in its circumferential direction, will not be deformed due to a large clamping force, and will cause less damage to the cable.

[0017] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention.

[0019] Figure 2 It is a partial structural schematic diagram of the housing in an embodiment of the present invention.

[0020] Figure 3 It is a partial structural diagram of an embodiment of the present invention.

[0021] Figure 4 yes Figure 3 Front view of .

[0022] Figure 5 yes Figure 4Schematic diagram of the cross section along AA direction.

[0023] Figure 6 yes Figure 4 Enlarged schematic diagram of point C in the middle. DETAILED DESCRIPTION

[0024] See also Figure 1-6 , in the figure: 100, housing; 110, flaw detector; 120, guide channel; 130, guide wheel; 200, walking mechanism; 210, walking wheel; 220, third driving member; 300, winding mechanism; 310, first winding wheel; 311, transmission part; 312, winding part; 313, guide wheel; 314, brush; 320, second winding wheel; 330, steel strand; 340, first driving member; 400, cable.

[0025] An embodiment of a cable defect detection device of the present invention is as follows Figures 1 to 6 As shown, it includes a housing 100 , a walking mechanism 200 and a winding mechanism 300 .

[0026] The housing 100 is sleeved outside the cable 400 and in rolling contact with the cable 400. The housing 100 is provided with a flaw detector 110 at one end in the axial direction of the cable 400. The flaw detector 110 is a prior art, wherein the probe part thereof is installed on the housing 100 and moves synchronously with the housing 100, and the host part thereof can move synchronously with the movement of the housing 100 on the ground.

[0027] The winding mechanism 300 includes a first winding wheel 310, a second winding wheel 320 and a steel strand 330; the first winding wheel 310 and the second winding wheel 320 are coaxially arranged, both are sleeved outside the cable 400, and both are rotatably installed in the housing 100. The first winding wheel 310 and the second winding wheel 320 are spaced apart in the axial direction of the cable 400, and the first winding wheel 310 is located on the side of the second winding wheel 320 away from the flaw detector 110. One end of the steel strand 330 is wound on the first winding wheel 310, and the other end is spirally wound outside the cable 400 and then wound on the second winding wheel 320, and then wound out from the second winding wheel 320 and returned from the housing 100 to the first winding wheel 310 and connected to one end thereof, that is, the steel strand 330 is a closed ring. The first winding wheel 310 and the second winding wheel 320 are both split structures consisting of two parts, and the two parts of the housing 100, the first winding wheel 310 and the second winding wheel 320 are respectively sleeved on the cable 400 and fixedly connected. Preferably, both split parts of the housing 100 are provided with balls (not shown in the figure), and after the housing 100 is installed on the cable 400, the housing 100 contacts the cable 400 through the balls, so as to reduce the resistance of the housing 100 moving along the cable 400.

[0028] The walking mechanism 200 includes a walking wheel 210 rotatably mounted in the housing 100, the axis of the walking wheel 210 is perpendicular to the cable 400 and meshes with the steel strand 330 wound around the cable 400, so as to drive the housing 100 to move along the axial direction of the cable 400 during rotation. The walking mechanism 200 also includes a third driving member 220, which is a motor, and is used to drive the walking wheel 210 to rotate.

[0029] As the first winding wheel 310 and the second winding wheel 320 rotate, the traveling wheel 210 rotates, so that the steel strand 330 is wound off the first winding wheel 310, wrapped around the cable 400, and then rolled up on the second winding wheel 320, and then wound off the second winding wheel 320 and returned from the housing 100 to the first winding wheel 310. At the same time, the traveling wheel 210 drives the housing 100 and the first winding wheel 310 and the second winding wheel 320 installed in the housing 100 to move synchronously along the cable 400 under the engagement with the steel strand 330.

[0030] When testing the cable 400, first, the outer shell 100, the first winding wheel 310 and the second winding wheel 320 are all put on the outside of the cable 400, and then one end of the steel strand 330 is wound on the first winding wheel 310, and the other end is spirally wound on the outside of the cable 400 and then wound on the second winding wheel 320, and then it is wound out from the second winding wheel 320 and returned from the outer shell 100 to the first winding wheel 310 and connected to one end thereof. The steel strand 330 is tightly wound on the outside of the cable 400 to prevent it from slipping under the engagement of the running wheel 210, and the steel strand 330 is spirally wound on the outside of the cable 400, and its pitch can be adjusted as needed to make it compatible with the tooth spacing of the running wheel 210. Among them, along the axial direction of the cable 400, the side where the first winding wheel 310 is located is the front, and the side where the second winding wheel 320 is located is the rear. When the detection starts, the first winding wheel 310, the second winding wheel 320 and the walking wheel 210 are started to rotate at the same time, so that the steel strand 330 is wound off from the first winding wheel 310, wrapped around the cable 400, and then rolled up on the second winding wheel 320, and then wound off from the second winding wheel 320 and returned to the first winding wheel 310 from the shell 100. At the same time, the walking wheel 210 drives the shell 100 and the first winding wheel 310 and the second winding wheel 320 installed in the shell 100 to move synchronously along the cable 400 under the engagement with the steel strand 330; wherein, the rotation speeds of the first winding wheel 310, the second winding wheel 320 and the walking wheel 210 need to be adjusted to match, so as to ensure that the steel strand 330 wound off from the first winding wheel 310 can be evenly wound around the outside of the cable 400. The housing 100 moves along the cable 400 and drives the flaw detector 110 to move and detect the cable 400 .

[0031] By winding the steel strand 330 around the outside of the cable 400 and engaging it with the walking wheel 210, the walking wheel 210 drives the housing 100 to move. The walking wheel 210 has no direct contact with the cable 400 and will not slip due to dirt on the surface of the cable 400. Even if there are defects on the surface of the cable 400 or the cable 400 is partially deformed, the impact on the walking wheel 210 will be weakened by being wrapped by the steel strand 330 that is wrapped around the outside of the cable 400, making the movement of the walking wheel 210 more stable.

[0032] Furthermore, since the steel strand 330 is completely wrapped around the cable 400 to guide the movement of the walking wheel 210, compared to the method of clamping the cable 400 with two rollers and rotating and moving at the same time in the prior art, the cable 400 is subjected to more uniform force in its circumferential direction, will not be deformed due to the larger clamping force, and will suffer less damage to the cable 400.

[0033] In this embodiment, the winding mechanism 300 further includes a first driving member 340, and there are two first driving members 340. The first winding wheel 310 and the second winding wheel 320 have the same structure, both including a transmission part 311 and a winding part 312, the transmission part 311 and the winding part 312 are coaxial, and the winding part 312 is used to wind the steel strand 330, which is located on one side of the transmission part 311 close to the part of the steel strand 330 wound outside the cable 400. The transmission part 311 is used to connect with the first driving member 340, and drive the winding part 312 to rotate under the drive of the first driving member 340. Specifically, the transmission part 311 is an end bevel gear, and the first driving member 340 is a motor, which is installed on the housing 100, and meshes with the transmission part 311 through the bevel gear installed on the output shaft of the motor, thereby driving the transmission part 311 to rotate. In some other embodiments, the transmission part 311 can also be selected from gears, and the output shaft of the first driving member 340 and the transmission part 311 are driven by gear meshing. Preferably, the two first driving members 340 may be respectively installed on the two split parts of the housing 100 , so that the mass distribution of the two split parts of the housing 100 is uniform.

[0034] In this embodiment, a pair of guide wheels 313 are provided on the winding parts 312 of the first winding wheel 310 and the second winding wheel 320. The guide wheels 313 are rotatably installed on the winding parts 312 and are perpendicular to the axis of the cable 400. The guide wheels 313 on the second winding wheel 320 guide the steel strands 330 outside the cable 400 to be wound around the winding part 312 of the second winding wheel 320. The guide wheels 313 on the first winding wheel 310 guide the steel strands 330 to detach from the winding part 312 of the first winding wheel 310 and then be wound around the cable 400. Taking the guide wheel 313 on the second winding wheel 320 as an example, the extension direction of the steel strand 330 when it is detached from the cable 400 is opposite to the direction of entering the winding part 312 of the second winding wheel 320, that is, the steel strand 330 changes direction between the two guide wheels 313, so that when the second winding wheel 320 rotates, the steel strand 330 is wound on the second winding wheel 320, and the steel strand 330 previously wound on the second winding wheel 320 can be detached from the second winding wheel 320.

[0035] In this embodiment, a brush 314 is connected to the winding portion 312 of the first winding wheel 310 , and the brush 314 rotates and moves with the first winding wheel 310 to clean the outer surface of the cable 400 .

[0036] In this embodiment, a guide channel 120 is provided in the housing 100 , and the guide channel 120 is parallel to the cable 400 . The steel strand 330 detached from the second winding wheel 320 returns to the first winding wheel 310 through the guide channel 120 .

[0037] In this embodiment, a pair of guide wheels 130 are provided at one end of the guide channel 120 close to the second winding wheel 320. Both guide wheels 130 are rotatably mounted on the housing 100 around an axis perpendicular to the cable 400, and are respectively located on both sides of the steel strand 330 and abut against the steel strand 330. One of the guide wheels 130 is connected to a second driving member, and the second driving member drives the guide wheel 130 to rotate to assist the steel strand 330 to enter the guide channel 120 after it is separated from the second winding wheel 320. In some other embodiments, at least one guide wheel may be provided at one end of the guide channel 120 close to the first winding wheel 310, for guiding the steel strand 330 separated from the guide channel 120 to be wound around the first winding wheel 310.

[0038] In this embodiment, the running wheel 210 is a turbine, and a tooth groove is provided on the outer circumference of the turbine, and the spacing between two adjacent tooth grooves is the same as the pitch of the steel strand 330 wound outside the cable 400. In some other embodiments, the running wheel 210 is a helical gear, and the tooth spacing of the helical gear is the same as the pitch of the steel strand 330 wound outside the cable 400. The running wheel 210 is set as a helical gear, which can balance the torque generated by the steel strand 330 when it is wound outside the cable 400. That is, if the steel strand 330 is spirally wound outside the cable 400 so that the whole device has a tendency to rotate forward, the helical gear will cause the whole device to flip when it is meshed with the steel strand 330. The two rotational tendencies offset each other, which can make the movement of the whole device more stable.

[0039] In this embodiment, there are two sets of walking mechanisms 200, and the third driving members 220 of the two sets of walking mechanisms 200 can be installed on the same split part of the housing 100, so as to ensure the installation accuracy of the two walking wheels 210. In some other embodiments, the third driving members 220 of the two sets of walking mechanisms 200 can be installed on the two split parts of the housing 100 respectively, so that the mass distribution of the two split parts of the housing 100 is uniform.

[0040] When a cable defect detection device of the present invention is in use, the outer shell 100, the first winding wheel 310 and the second winding wheel 320 are firstly sleeved on the outside of the cable 400, and then one end of the steel strand 330 is wound on the first winding wheel 310, and the other end is spirally wound on the outside of the cable 400 and then wound on the second winding wheel 320, and then it is wound out from the second winding wheel 320 and returned from the outer shell 100 to the first winding wheel 310 and connected to one end thereof. The steel strand 330 is tightly wound on the outside of the cable 400 to prevent it from slipping under the engagement of the running wheel 210, and the steel strand 330 is spirally wound on the outside of the cable 400, and its pitch can be adjusted as needed to make it compatible with the tooth spacing of the running wheel 210. Among them, along the axial direction of the cable 400, the side where the first winding wheel 310 is located is the front, and the side where the second winding wheel 320 is located is the rear. When the detection starts, the first drive member 340, the second drive member and the third drive member 220 are started at the same time, so that the first winding wheel 310, the second winding wheel 320, the walking wheel 210 and the guide wheel 130 start to rotate at the same time, so that the steel strand 330 is wound off from the first winding wheel 310, wrapped around the cable 400, and then rolled up on the second winding wheel 320, and then wound off from the second winding wheel 320 and returned to the first winding wheel 310 from the shell 100. At the same time, the walking wheel 210 drives the shell 100 and the first winding wheel 310 and the second winding wheel 320 installed in the shell 100 to move forward along the cable 400 synchronously under the engagement with the steel strand 330. The rotation speeds of the first winding wheel 310, the second winding wheel 320 and the travel wheel 210 need to be adjusted to match each other, so as to ensure that the steel strand 330 wound from the first winding wheel 310 can be evenly wound around the cable 400. The housing 100 drives the flaw detector 110 to move and inspect the cable 400 while moving along the cable 400. Since the brush 314 is installed on the first winding wheel 310, that is, the brush 314 first cleans the cable 400 and then the steel strand 330 is wound around the cable 400, and finally the flaw detector 110 inspects the cable 400, so as to avoid dust and dirt on the surface of the cable 400 affecting the inspection effect of the flaw detector 110.

[0041] The above description is only a specific implementation mode of the present invention, and various examples do not constitute a limitation on the essential content of the present invention.

Claims

1. A cable defect detection device, characterized in that: It comprises a housing (100), a walking mechanism (200) and a winding mechanism (300); The housing (100) is sleeved outside the cable (400) and is in rolling contact with the cable (400); a flaw detector (110) is provided at one end of the housing (100) in the axial direction of the cable (400); The winding mechanism (300) comprises a first winding wheel (310), a second winding wheel (320) and a steel strand (330); the first winding wheel (310) and the second winding wheel (320) are coaxially arranged, both are sleeved outside the cable (400), and both are rotatably installed in the housing (100); the first winding wheel (310) and the second winding wheel (320) are spaced apart in the axial direction of the cable (400), and the first winding wheel (310) is located on the side of the second winding wheel (320) away from the flaw detector (110); one end of the steel strand (330) is wound around the first winding wheel (310), and the other end is spirally wound around the cable (400) and then wound around the second winding wheel (320), then wound out from the second winding wheel (320) and returned from the housing (100) to the first winding wheel (310) and connected to one end thereof; The walking mechanism (200) comprises a walking wheel (210) rotatably mounted in the housing (100); the axis of the walking wheel (210) is perpendicular to the cable (400) and meshes with the steel strand (330) wound around the cable (400), so as to drive the housing (100) to move along the axial direction of the cable (400) when rotating; The first winding wheel (310) and the second winding wheel (320) rotate while the running wheel (210) rotates, so that the steel strand (330) is wound from the first winding wheel (310), wrapped around the cable (400), and then rolled up on the second winding wheel (320), and then wound from the second winding wheel (320) and returned from the housing (100) to the first winding wheel (310), while the running wheel (210) drives the housing (100) and the first winding wheel (310) and the second winding wheel (320) installed in the housing (100) to move synchronously along the cable (400) under the meshing with the steel strand (330); The winding mechanism (300) further comprises a first driving member (340), and there are two first driving members (340); the first winding wheel (310) and the second winding wheel (320) have the same structure, and both comprise a transmission part (311) and a winding part (312); the transmission part (311) and the winding part (312) are coaxial; the winding part (312) is used to wind the steel strand (330), and is located on one side of the transmission part (311) close to the part of the steel strand (330) wound outside the cable (400); the transmission part (311) is used to connect with the first driving member (340), and drives the winding part (312) to rotate under the drive of the first driving member (340); A pair of guide wheels (313) are provided on the winding parts (312) of the first winding wheel (310) and the second winding wheel (320); the guide wheels (313) are rotatably mounted on the winding parts (312) and are perpendicular to the axis of the cable (400); the guide wheels (313) on the second winding wheel (320) guide the steel strands (330) outside the cable (400) to be wound around the winding part (312) of the second winding wheel (320); and the guide wheels (313) on the first winding wheel (310) guide the steel strands (330) to be separated from the winding part (312) of the first winding wheel (310) and then wound around the cable (400); A guide channel (120) is provided in the housing (100), the guide channel (120) being parallel to the cable (400), and the steel strand (330) detached from the second winding wheel (320) returns to the first winding wheel (310) through the guide channel (120); A pair of guide wheels (130) is provided at one end of the guide channel (120) close to the second winding wheel (320). The two guide wheels (130) are both rotatably mounted on the housing (100) around an axis perpendicular to the cable (400), and are respectively located on both sides of the steel strand (330) and are in contact with the steel strand (330). One of the guide wheels (130) is connected to a second driving member, and the second driving member drives the guide wheel (130) to rotate to assist the steel strand (330) to detach from the second winding wheel (320) and enter the guide channel (120).

2. A cable defect detection device according to claim 1, characterized in that: A brush (314) is connected to the winding portion (312) of the first winding wheel (310), and the brush (314) cleans the outer surface of the cable (400) while rotating and moving with the first winding wheel (310).

3. A cable defect detection device according to claim 1, characterized in that: The walking mechanism (200) further comprises a third driving member (220), and the third driving member (220) is used to drive the walking wheel (210) to rotate.

4. A cable defect detection device according to claim 1, characterized in that: The running wheel (210) is a turbine, and tooth grooves are provided on the outer peripheral surface of the turbine, and the spacing between two adjacent tooth grooves is the same as the pitch of the steel strands (330) wound around the cable (400).

5. A cable defect detection device according to claim 1, characterized in that: The traveling wheel (210) is a helical gear, and the tooth pitch of the helical gear is the same as the pitch of the steel strand (330) wound around the cable (400).

6. A cable defect detection device according to claim 1, characterized in that: The first winding wheel (310) and the second winding wheel (320) are both split structures consisting of two parts, and the two parts of the housing (100), the first winding wheel (310) and the second winding wheel (320) are respectively sleeved on the cable (400) and fixedly connected.

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