Cable insulation failure detection device

Abstract

The invention relates to a cable insulation failure detection device in the technical field of cable safety, and the device comprises a housing which can sleeve a cable body and a detection system, at least one end part of the housing is provided with a walking mechanism which can walk on the cable body, and two ends of the housing are respectively provided with a reducing part. A sealing ring which can be movably matched with the cable body in a sealing manner is arranged on the inner ring surface of the reducing part; the bottom of the shell is provided with a liquid storage cylinder communicated with an inner cavity of the shell, and the inner cavity of the liquid storage cylinder is vertically and movably matched with a liquid pushing assembly with the bottom extending out. According to the invention, when the cable has an insulation failure area, the conductive liquid enters the cable core along with the damaged part and is contacted with the cable core with electric charges, at the moment, the detection system can detect the insulation failure condition at the position of the cable and give an alarm, and compared with the mode that a probe acts on the cable body, the detection precision is higher, and the detection time is shortened. And no missing area appears.

Description

Technical Field

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

[0002] Most cable insulation layers are made through an extrusion process, which involves heating and melting a polymer material with good electrical insulation properties, and then extruding it and wrapping it around the outside of the cable conductor core. During the extrusion process, if the cable conductor core is not coaxial with the extrusion die, or if the cable conductor core has insufficient tension, the cable conductor core will bend in the extrusion die, which will cause the extruded cable insulation layer to not wrap the cable conductor core in the center and may be easily damaged during use. A damaged cable insulation layer may lead to risks such as short circuits and leakage during use of the cable product.

[0003] Traditional maintenance is to send workers to the cable by ladder truck and use probes to detect the cable. When the cable insulation fails (usually damaged), the probe contacts the cable core and the detection system sends an alarm signal. However, this method is not suitable for the above detection methods of cables with long spans and high installation positions, and the operation is cumbersome and the work efficiency is low.

[0004] Therefore, we designed a cable insulation failure detection device. Summary of the invention

[0005] In order to overcome the deficiencies in the background technology, the present invention discloses a cable insulation failure detection device.

[0006] In order to achieve the above-mentioned invention object, the present invention adopts the following technical scheme: A cable insulation failure detection device, comprising a shell that can be sleeved on a cable body and a detection system, wherein at least one end of the shell is provided with a walking mechanism that can walk on the cable body, and both ends of the shell are provided with a reduced diameter portion, and the inner annular surface of the reduced diameter portion is provided with a sealing ring that can be sealed and movably matched with the cable body; the bottom of the shell is provided with a liquid storage cylinder connected to its inner cavity, and the upper and lower inner cavities of the liquid storage cylinder are sealed and movably matched with a liquid pushing component extending from the bottom, so as to facilitate pushing the conductive liquid in the inner cavity of the liquid storage cylinder into the inner cavity of the shell; the detection end of the detection system is sealed and extended into the inner cavity of the shell; The housing comprises a lower housing, an upper housing and a connecting piece, one side of the lower housing is hinged to one side of the upper housing, and the other side of the lower housing is detachably connected to the other side of the upper housing through the connecting piece, and a sealing gasket is provided between the butt surfaces of the lower housing and the upper housing; The sealing ring comprises two semi-ring sealing sections, and the opening ends of the semi-ring sealing sections are each provided with an extension section extending outward.

[0007] Preferably, the travel mechanism comprises a shell body formed by upper and lower splicing, and three rubber wheels capable of rolling on the cable body are arranged at intervals along the circumference of the inner side of the shell; the shell is also provided with a travel motor drivingly connected to the axle of any rubber wheel.

[0008] Preferably, a cleaning component for cleaning impurities on the cable body is provided at the front end of the housing.

[0009] Preferably, the cleaning assembly includes a lower arc-shaped slide rail fixedly connected to the lower shell body and an upper arc-shaped slide rail fixedly connected to the upper shell body. The lower arc-shaped slide rail and the upper arc-shaped slide rail form an annular slide rail. The annular slide rail body is slidably matched with an electric slider, and a brush plate capable of brushing the cable body is installed on the electric slider.

[0010] Preferably, a negative pressure adsorption component is provided at the rear end of the housing; The negative pressure adsorption component comprises an air suction ring and a negative pressure pump which are spliced ​​up and down. The air inlet end of the negative pressure pump is connected with the inner cavity of the air suction ring. The air suction ring is matched with the cable body, and the inner ring surface of the air suction ring is provided with an air suction port.

[0011] Preferably, the air intake port is a plurality of small holes evenly spaced along the inner ring surface of the spliced ​​air intake ring, or a ring-shaped port axially along the inner ring surface of the spliced ​​air intake ring.

[0012] Preferably, the outer side surfaces of the semi-ring sealing section and the extension section are both provided with embedded portions.

[0013] Preferably, a fluid infusion tube is provided on the top of the shell, and a breathing valve is provided on the top of the fluid infusion tube.

[0014] Preferably, the fluid infusion tube is made of transparent material.

[0015] Preferably, the liquid pushing assembly includes a piston plate sealingly and movably fitted in the inner cavity of the liquid storage cylinder, the bottom of the piston plate is coaxially rotatably connected to a screw, the lower section of the screw passes through the bottom of the liquid storage cylinder, and the screw rod body is threadedly fitted with the bottom of the liquid storage cylinder.

[0016] Due to the adoption of the above-mentioned technical solution, the present invention has the following beneficial effects: 1. The piston plate can be moved upward by rotating the screw, so that the conductive liquid in the inner cavity of the liquid storage cylinder enters the inner cavity of the shell and wraps around the cable body. In this way, when there is an insulation failure area in the cable, the conductive liquid will enter the cable core along the damaged area and contact the cable core with charge. At this time, the detection system can detect the insulation failure of the cable here and issue an alarm. Compared with using a probe to act on the cable body, the detection accuracy is higher and there will be no missed areas; 2. The arrangement of the liquid replenishing tube and the breathing valve can ensure that after the conductive liquid partially leaks out from between the sealing ring and the cable body, the conductive liquid in the liquid replenishing tube can be replenished into the outer shell under the action of gravity, ensuring that there is enough conductive liquid in the outer shell to completely wrap the cable in its inner cavity; 3. The setting of the cleaning component can drive the brush plate to move around the cable body in a circle through the electric slider to brush the cable body, so that the dust on the cable body falls off, preventing the dust on the cable body from entering the sealing ring, affecting the sealing effect between the sealing ring and the cable body, and causing a large amount of conductive liquid to seep out; 4. The setting of the negative pressure adsorption component can generate negative pressure inside the suction ring through the negative pressure pump, so that negative pressure appears between the suction ring and the cable body, and the conductive liquid remaining in the cable body is adsorbed into the suction ring, thereby realizing the function of cleaning the conductive liquid remaining in the cable body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a structural schematic diagram of the walking mechanism in the present invention; Figure 3 It is a partial structural schematic diagram of the sealing ring in the present invention.

[0018] In the figure: 1. outer shell; 11. lower shell; 12. upper shell; 13. connecting part; 2. walking mechanism; 21. shell; 22. rubber wheel; 23. walking motor; 3. liquid storage cylinder; 31. liquid pushing assembly; 311. piston plate; 312. screw; 4. sealing ring; 41. semi-ring sealing section; 42. extension section; 43. embedded part; 5. sealing gasket; 6. cleaning assembly; 61. lower arc slide rail; 62. upper arc slide rail; 63. electric slider; 64. brush plate; 7. negative pressure adsorption assembly; 1. suction ring; 72. negative pressure pump; 8. liquid replenishing tube; 9. breathing valve. DETAILED DESCRIPTION

[0019] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "back", "left", "right", etc. indicating directions or positional relationships, they only correspond to the drawings of the present application and are for the convenience of describing the present invention; it should be understood that if there are terms such as "end", "side", "end portion", "lateral", "lateral", "transverse", "longitudinal", etc. indicating directions or positional relationships, they only correspond to the length and width of the corresponding components, that is, the "end portion" indicates the head and tail areas in the length direction of the corresponding component, and the "side portion" indicates the head and tail areas in the width direction of the corresponding component; this is for the convenience of describing the present invention and is not to indicate or imply that the device or element referred to must have a specific direction.

[0020] Embodiment 1, in combination with the attached Figure 1-3 A cable insulation failure detection device includes a housing 1 that can be mounted on a cable body and a detection system. Since the detection system adopts the existing technology, it will not be described here. At least one end of the housing 1 is provided with a walking mechanism 2 that can walk on the cable body.

[0021] As required, the housing 1 is made of insulating material.

[0022] In a possible embodiment, the traveling mechanism 2 includes a shell 21 formed by upper and lower splicing, and three rubber wheels 22 capable of rolling on the cable body are arranged at intervals along the circumference of the shell 21; the shell 21 is also provided with a traveling motor 23 drivingly connected to the wheel axle of any rubber wheel 22.

[0023] According to needs, the travel motor 23 is a reduction motor.

[0024] As needed, the output shaft of the travel motor 23 or the axle of the rubber wheel 22 is provided with an encoder, which is connected to the detection system signal. The encoder detects the rotation angle of the output shaft of the travel motor 23 or the axle of the rubber wheel 22 to obtain the length of the cable and ultimately determine the location of the cable insulation failure.

[0025] Both ends of the outer shell 1 are provided with a reduced diameter portion, and the inner annular surface of the reduced diameter portion is provided with a sealing ring 4 that can be sealed and movably matched with the cable body; the bottom of the outer shell 1 is provided with a liquid storage cylinder 3 connected with its inner cavity, and the upper and lower inner cavity of the liquid storage cylinder 3 is sealed and movably matched with a liquid pushing component 31 extending from the bottom, so as to push the conductive liquid in the inner cavity of the liquid storage cylinder 3 into the inner cavity of the outer shell 1; the detection end of the detection system is sealed and extended into the inner cavity of the outer shell 1.

[0026] In a possible embodiment, the liquid pushing assembly 31 includes a piston plate 311 that is sealingly and movably engaged with the inner cavity of the liquid storage cylinder 3, and the bottom of the piston plate 311 is coaxially connected to a screw 312, the lower section of the screw 312 passes through the bottom of the liquid storage cylinder 3, and the shaft of the screw 312 is threadedly engaged with the bottom of the liquid storage cylinder 3; that is, by rotating the screw 312, the piston plate 311 moves upward, so that the conductive liquid in the inner cavity of the liquid storage cylinder 3 enters the inner cavity of the outer shell 1 and is wrapped around the cable body. In this way, when there is an insulation failure area in the cable, the conductive liquid will enter the damaged area and contact the cable core with an electric charge. At this time, the detection system can detect the insulation failure of the cable here and issue an alarm. Compared with using a probe to act on the cable body, the detection accuracy is higher and there will be no missed areas.

[0027] As required, the lower end of the screw rod 312 may be provided with a rotating handle or a driving motor.

[0028] As required, the screw rod 312 may also be replaced by an electric telescopic rod.

[0029] In order to realize disassembly and assembly from the cable, the housing 1 includes a lower housing 11, an upper housing 12 and a connecting piece 13, one side of the lower housing 11 is hinged to one side of the upper housing 12, and the other side of the lower housing 11 is detachably connected to the other side of the upper housing 12 through the connecting piece 13, and a sealing gasket 5 is provided between the butt surfaces of the lower housing 11 and the upper housing 12; As required, the connecting member 13 may be a bolt and nut assembly, or a lock or other structure.

[0030] The sealing ring 4 includes two semi-ring sealing sections 41 , and the opening ends of the semi-ring sealing sections 41 are each provided with an extension section 42 extending outward; in this way, the semi-ring sealing sections 41 can be effectively dropped from the corresponding lower shell 11 or upper shell 12 .

[0031] Embodiment 2, combined with the attached Figure 1 , a cable insulation failure detection device, based on the first embodiment, due to the active cooperation between the sealing ring 4 and the cable body, a small amount of conductive liquid will seep out. In order to prevent the conductive liquid in the outer shell 1 from completely wrapping the cable located in its inner cavity, a liquid infusion tube 8 is provided on the top of the outer shell 1, and a breathing valve 9 is provided on the top of the liquid infusion tube 8; that is, before operation, the conductive liquid is allowed to enter the liquid infusion tube 8. When the conductive liquid seeps out from between the sealing ring 4 and the cable body, the conductive liquid in the liquid infusion tube 8 is replenished into the outer shell 1 under the action of gravity, ensuring that there is enough conductive liquid in the outer shell 1 to completely wrap the cable located in its inner cavity.

[0032] As required, the liquid infusion tube 7 is made of a transparent material.

[0033] Embodiment 3, in combination with the attached Figure 1 , a cable insulation failure detection device, based on the first or second embodiment, a cleaning component 6 for cleaning impurities in the cable body is provided at the front end of the housing 1.

[0034] The cleaning assembly 6 includes a lower arc-shaped slide rail 61 fixedly connected to the lower shell 11 and an upper arc-shaped slide rail 62 fixedly connected to the upper shell 12. The lower arc-shaped slide rail 61 and the upper arc-shaped slide rail 62 form an annular slide rail, and the annular slide rail body is slidably matched with an electric slider 63. A brush plate 64 capable of brushing the cable body is installed on the electric slider 63; that is, during operation, the brush plate 64 is driven by the electric slider 63 to move in a circle around the cable body to brush the cable body, so that dust on the cable body falls off, and dust on the cable body is prevented from entering the sealing ring 4, affecting the sealing effect between the sealing ring 4 and the cable body, and causing a large amount of conductive liquid to seep out.

[0035] Embodiment 4, in combination with the attached Figure 1 , a cable insulation failure detection device, based on any one of the first to third embodiments, a negative pressure adsorption component 7 is provided at the rear end of the housing 1; The negative pressure adsorption component 7 includes an air suction ring 71 and a negative pressure pump 72 which are spliced ​​up and down. The air inlet end of the negative pressure pump 72 is connected with the inner cavity of the air suction ring 71. The air suction ring 71 is matched and sleeved on the cable body, and an air suction port is provided on the inner ring surface of the air suction ring 71. This arrangement can generate negative pressure inside the air suction ring 71 through the negative pressure pump 72, so that negative pressure appears between the air suction ring 71 and the cable body, and the conductive liquid remaining in the cable body is adsorbed into the air suction ring 71.

[0036] As required, the negative pressure pump 72 adopts a negative pressure pump with waterproof function. The specific principle can refer to the vacuum cleaner, and its specific structure and principle will not be repeated here.

[0037] As required, the air intake port may be a plurality of small holes evenly spaced along the inner surface of the spliced ​​air intake ring 71 ; as required, the air intake port may also be an annular port axially along the inner surface of the spliced ​​air intake ring 51 .

[0038] The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention; therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and it is intended that all changes that fall within the meaning and scope of equivalent elements are included in the present invention.

Claims

1. A cable insulation failure detection device, comprising a housing (1) that can be sleeved on a cable body and a detection system, wherein at least one end of the housing (1) is provided with a walking mechanism (2) that can walk on the cable body, characterized in that: Both ends of the shell (1) are provided with a reduced diameter portion, and the inner annular surface of the reduced diameter portion is provided with a sealing ring (4) that can be sealed and movably matched with the cable body; the bottom of the shell (1) is provided with a liquid storage cylinder (3) connected to its inner cavity, and the inner cavity of the liquid storage cylinder (3) is sealed and movably matched with a liquid pushing component (31) extending from the bottom, so as to facilitate pushing the conductive liquid in the inner cavity of the liquid storage cylinder (3) into the inner cavity of the shell (1); the detection end of the detection system is sealed and extends into the inner cavity of the shell (1); The housing (1) comprises a lower housing (11), an upper housing (12) and a connecting piece (13); one side of the lower housing (11) is hinged to one side of the upper housing (12); the other side of the lower housing (11) is detachably connected to the other side of the upper housing (12) via the connecting piece (13); and a sealing gasket (5) is provided between the butt joint surfaces of the lower housing (11) and the upper housing (12); The sealing ring (4) comprises two semi-ring sealing sections (41), and the opening ends of the semi-ring sealing sections (41) are each provided with an extension section (42) extending outwards.

2. The cable insulation failure detection device according to claim 1, characterized in that: The traveling mechanism (2) comprises a shell (21) formed by upper and lower splicing, and three rubber wheels (22) capable of rolling on the cable body are arranged at intervals along the circumference of the inner side of the shell (21); the shell (21) is also provided with a traveling motor (23) drivingly connected to the wheel axle of any rubber wheel (22).

3. The cable insulation failure detection device according to claim 1, characterized in that: The front end of the housing (1) is provided with a cleaning component (6) for cleaning impurities from the cable body.

4. The cable insulation failure detection device according to claim 3, characterized in that: The cleaning assembly (6) comprises a lower arc-shaped slide rail (61) fixedly connected to the lower shell (11) and an upper arc-shaped slide rail (62) fixedly connected to the upper shell (12). The lower arc-shaped slide rail (61) and the upper arc-shaped slide rail (62) form an annular slide rail. The annular slide rail body is slidably matched with an electric slider (63). A brush plate (64) capable of brushing the cable body is installed on the electric slider (63).

5. The cable insulation failure detection device according to claim 1, characterized in that: A negative pressure adsorption component (7) is provided at the rear end of the housing (1); The negative pressure adsorption component (7) comprises an air suction ring (71) and a negative pressure pump (72) formed by upper and lower splicing, the air inlet end of the negative pressure pump (72) is connected to the inner cavity of the air suction ring (71), the air suction ring (71) is matched with the cable body, and the inner ring surface of the air suction ring (71) is provided with an air suction port.

6. The cable insulation failure detection device according to claim 5, characterized in that: The air intake port is a plurality of small holes evenly spaced along the inner ring surface of the spliced ​​air intake ring (71), or a ring port axially arranged along the inner ring surface of the spliced ​​air intake ring (51).

7. The cable insulation failure detection device according to claim 1, characterized in that: The outer sides of the semi-ring sealing section (41) and the extension section (42) are both provided with an embedded portion (43).

8. The cable insulation failure detection device according to claim 1, characterized in that: A liquid infusion tube (8) is provided at the top of the housing (1), and a breathing valve (9) is provided at the top of the liquid infusion tube (8).

9. The cable insulation failure detection device according to claim 8, characterized in that: The liquid infusion tube (7) is made of a transparent material.

10. The cable insulation failure detection device according to claim 8, characterized in that: The liquid pushing assembly (31) comprises a piston plate (311) which is sealingly and movably engaged with the inner cavity of the liquid storage cylinder (3); the bottom of the piston plate (311) is coaxially rotatably connected with a screw rod (312); the lower section of the screw rod (312) passes through the bottom of the liquid storage cylinder (3), and the shaft of the screw rod (312) is threadably engaged with the bottom of the liquid storage cylinder (3).

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