Cable partial discharge detection device

Abstract

The utility model belongs to the technical field of cable detection, and discloses a cable partial discharge detection device, which comprises a detection device, a pay-off port is arranged on the front surface of the detection device, a take-up assembly is arranged in the pay-off port, a detection wire harness is wound on the outer surface of the take-up assembly, and the detection wire harness is connected with the pay-off port. One end of the detection wire harness extends to the outside of the detection device through the pay-off port; the take-up assembly comprises a reset assembly which is movably installed in the detection device and on the back face of the pay-off opening, the other end of the detection wire harness is connected to the outer surface of the reset assembly, and a positioning cavity is formed in the middle of the reset assembly. Due to the arrangement of the positioning assembly, the winding roller can smoothly rotate in a single direction under the limitation of the detection device, the clockwork spring is pulled under the limitation of the positioning sleeve to increase the elastic restoring force of the clockwork spring, and the pulled and released detection wire harness can stop releasing at any time to ensure that the length of the detection wire harness is enough. And the situation of easy winding and knotting due to excessive release is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of cable detection, in particular to a cable partial discharge detection device. Background Art

[0002] With the increasing requirements for the continuity and stability of electric energy in industrial production and the large-scale application of high-voltage cables in urban power grid construction, cable operation safety has become a major concern for power grid operation and maintenance personnel. Partial discharge detection is an important method for evaluating the insulation condition of cables. By performing regular withstand voltage partial discharge testing or online partial discharge monitoring on cables, potential faults in cable insulation can be discovered, thereby avoiding safety accidents caused by the live operation of defective cables.

[0003] A Chinese patent document (publication number: CN219369913U) discloses a partial discharge detection device for reeled cables, belonging to the field of wire and cable detection technology. The device comprises a housing with a detector fixedly embedded in its upper surface, a support plate fixedly connected to its bottom surface, a cable reel placed on its upper surface, a fixed cover fixedly embedded in its inner sidewall, a lower fixed seat fixedly connected to its inner bottom wall, and an end of the cable reel remote from the support plate extending into the interior of the fixed cover. An upper fixed seat is provided within the fixed cover. A detection line is fixedly connected to the outer surface of the detector, and a detection chuck is fixedly connected to the end of the detection line remote from the detector. A detection guide rod is fixedly embedded in the inner sidewall of the fixed cover, the left end of the detection guide rod being fixedly connected to the right side of the lower fixed seat. This partial discharge detection device for reeled cables enables quick connection between the detector and the cable reel, improving the speed of partial discharge detection for reeled cables.

[0004] During the detection, connection must be made through a wiring harness. However, the connection harness used in existing cable partial discharge detection devices usually lacks a take-up device and a fixed-length pay-out device. The connection harness is messy or even tangled when it is taken out, which causes trouble to the staff. Utility Model Content

[0005] In order to solve the problems raised in the above background technology, the utility model provides a cable partial discharge detection device, which has the advantages of free wire release and wire reeling at any time.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a cable partial discharge detection device, comprising a detection device, wherein a wire-releasing opening is provided on the front of the detection device, a wire-receiving assembly is provided inside the wire-releasing opening, a detection wire harness is wound around the outer surface of the wire-receiving assembly, and one end of the detection wire harness extends to the outside of the detection device through the wire-releasing opening;

[0007] The wire take-up assembly includes a reset assembly movably installed inside the detection device and on the back of the wire pay-off port. The other end of the detection wire harness is connected to the outer surface of the reset assembly. A positioning cavity is formed in the middle of the reset assembly, and a positioning assembly is fixedly sleeved inside the positioning cavity. One end of the positioning assembly extends to the outside of the detection device and is connected to a control pressing block. The end of the detection wire harness connected to the outer surface of the reset assembly is connected to the detection mechanism inside the detection device through a contact ring fixedly connected inside the detection device.

[0008] Preferably, the reset assembly includes a wire winding roller movably installed inside the detection device. A positioning sleeve is movably sleeved inside the wire winding roller, and a hairspring is connected between the wire winding roller and the positioning sleeve.

[0009] Preferably, the cross-section of the wire winding roller is a horizontally placed "U" shape, and the cross-section of the positioning sleeve is a horizontally placed "L" shape. Both ends of the wire winding roller are rotatably connected to the inside of the detection device through bearings. The positioning sleeve and the wire winding roller are inserted into each other, and one end of the positioning sleeve penetrates through the wire winding roller and is fixedly connected to the inside of the detection device.

[0010] Preferably, the positioning sleeve is sleeved inside the wire winding roller. The middle parts of both the wire winding roller and the positioning sleeve are hollow structures, and the positioning cavity is composed of the hollow structures in the middle of the wire winding roller and the positioning sleeve.

[0011] Preferably, the positioning assembly includes a positioning gear sleeve fixedly sleeved on the inner wall of the positioning cavity inside the wire winding roller. A positioning ratchet wheel set is arranged at one end of the positioning gear sleeve. A plurality of pawls evenly distributed are connected to the side surface of the positioning ratchet wheel set through springs. The opposite surfaces of the positioning gear sleeve and the positioning ratchet wheel set are both conical structures parallel to each other, and the inner wall of the positioning gear sleeve and the plurality of pawls on the outer surface of the positioning ratchet wheel set are mutually abutted.

[0012] Preferably, a limiting sleeve is fixedly connected to the side of the positioning ratchet wheel set away from the positioning gear sleeve. A reset spring is arranged inside the limiting sleeve. One end of the reset spring abuts against the inside of the limiting sleeve, and the other end of the reset spring abuts against the inner wall of the detection device.

[0013] Preferably, a limiting slide bar is fixedly connected to the side of the positioning ratchet wheel set close to the positioning gear sleeve. The other end of the limiting slide bar penetrates through the detection device and is fixedly connected to the control pressing block. The cross-section of the limiting slide bar is polygonal, and the outer surface of the limiting slide bar is smooth and slidably connected to the inside of the detection device.

[0014] Preferably, the housing of the detection device is made of a waterproof composite material, and anti-slip textures are provided on the surface of the detection device. A portable handle is provided on its side. The portable handle adopts a foldable structure, which can be unfolded during use and stored in a corresponding groove opened on the housing when not in use.

[0015] Preferably, anti-slip patterns are provided on the surface of the control pressing block, and a dust-proof sealing ring is provided between the control pressing block and the housing of the detection device.

[0016] Preferably, a touch display screen is provided on the front panel of the detection device, and the touch display screen adopts a high-brightness anti-reflective material.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] 1. Due to the setting of the positioning component in the present utility model, under the limitation of the detection device, the winding roller can rotate smoothly in one direction, and under the limitation of the positioning sleeve, the clockwork spring is pulled to increase its elastic restoring force, and the detected wire harness pulled and released can stop releasing at any time to ensure that its length is sufficient and avoid the situation of excessive release and easy entanglement and knotting.

[0019] 2. Due to the setting of the control pressing block in the present utility model, pressing the control pressing block with the cooperation of the return spring can push the positioning pawl group wheel through the limit slide rod, so that the pawls on the side of the positioning pawl group wheel are disengaged from the positioning gear sleeve, so that the positioning gear sleeve and the winding roller can rotate in the reverse direction under the action of the elastic restoring force of the clockwork spring, and then the detected wire harness is recovered and wound.

[0020] 3. Since the proximal ends of the positioning pawl group wheel and the positioning gear sleeve are conical surfaces in the present utility model, the positioning pawl group wheel and several pawls on its side can be smoothly inserted into the inside of the positioning gear sleeve under the action of the elastic restoring force of the return spring, so that under the cooperation of the detection device and the limit slide rod, the rotation of the positioning gear sleeve and the winding roller is limited, so that the detected wire harness wound up can be stably stored inside the wire outlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of the present utility model;

[0022] Figure 2 is a schematic structural diagram of the wire winding component of the present utility model;

[0023] Figure 3 is a cross-sectional view of the side of the wire winding component of the present utility model;

[0024] Figure 4 is a front cross-sectional view of the positioning gear sleeve of the present utility model.

[0025] In the figure: 1. Detection device; 2. Wire releasing port; 3. Wire winding assembly; 31. Reset assembly; 311. Winding roller; 312. Positioning sleeve; 313. Hairspring; 32. Positioning cavity; 33. Positioning assembly; 331. Positioning gear sleeve; 332. Positioning pawl group wheel; 333. Limiting sleeve; 334. Reset spring; 335. Limiting slide bar; 34. Control pressing block; 4. Detection wire harness. Detailed implementation mode

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] As Figures 1 to 4 shown, the present invention provides a cable partial discharge detection device, including a detection device 1. A wire releasing port 2 is opened on the front surface of the detection device 1. A wire winding assembly 3 is arranged inside the wire releasing port 2. A detection wire harness 4 is wound around the outer surface of the wire winding assembly 3. One end of the detection wire harness 4 extends to the outside of the detection device 1 through the wire releasing port 2;

[0028] The wire winding assembly 3 includes a reset assembly 31 movably installed inside the detection device 1 and on the back surface of the wire releasing port 2. The other end of the detection wire harness 4 is connected to the outer surface of the reset assembly 31. A positioning cavity 32 is opened in the middle of the reset assembly 31. A positioning assembly 33 is fixedly sleeved inside the positioning cavity 32. One end of the positioning assembly 33 extends to the outside of the detection device 1 and is connected with a control pressing block 34. One end of the detection wire harness 4 connected to the outer surface of the reset assembly 31 is connected to the detection mechanism inside the detection device 1 through a contact ring fixedly connected inside the detection device 1; Due to the setting of the positioning assembly 33, under the limitation of the detection device 1, the winding roller 311 can rotate smoothly in one direction, and under the limitation of the positioning sleeve 312, the hairspring 313 is pulled to increase its elastic restoring force, and the released detection wire harness 4 can stop releasing at any time to ensure that its length is sufficient and avoid the situation of excessive release and easy winding and knotting.

[0029] As Figure 3 and Figure 4As shown, the reset assembly 31 includes a winding roller 311 movably installed inside the detection device 1. A positioning sleeve 312 is movably sleeved inside the winding roller 311. A clockwork spring 313 is connected between the winding roller 311 and the positioning sleeve 312. Due to the arrangement of the winding roller 311 and the positioning sleeve 312, it can not only ensure the stability when the two rotate relative to each other, but also control the movement of the clockwork spring 313 in cooperation with the positioning assembly 33, so that the staff can better utilize the elastic restoring force of the clockwork spring 313.

[0030] As Figure 3 shown, the cross-section of the winding roller 311 is a horizontally placed "U" shape, and the cross-section of the positioning sleeve 312 is a horizontally placed "L" shape. Both ends of the winding roller 311 are rotatably connected to the inside of the detection device 1 through bearings. The positioning sleeve 312 and the winding roller 311 are inserted into each other, and one end of the positioning sleeve 312 penetrates through the winding roller 311 and is fixedly connected to the inside of the detection device 1.

[0031] As Figure 3 shown, the positioning sleeve 312 is sleeved inside the winding roller 311. Both the middle parts of the winding roller 311 and the positioning sleeve 312 are hollow structures. The positioning cavity 32 is composed of the hollow structures in the middle parts of the winding roller 311 and the positioning sleeve 312.

[0032] As Figure 3 and Figure 4 shown, the positioning assembly 33 includes a positioning gear sleeve 331 fixedly sleeved on the inner wall of the positioning cavity 32 inside the winding roller 311. A positioning ratchet wheel group 332 is arranged at one end of the positioning gear sleeve 331. A number of ratchets are evenly distributed on the side of the positioning ratchet wheel group 332 and connected by springs. The opposite surfaces of the positioning gear sleeve 331 and the positioning ratchet wheel group 332 are both conical structures parallel to each other. A number of ratchets on the inner wall of the positioning gear sleeve 331 and the outer surface of the positioning ratchet wheel group 332 are in mutual abutment. Since the proximal ends of the positioning ratchet wheel group 332 and the positioning gear sleeve 331 are conical surfaces, the positioning ratchet wheel group 332 and a number of ratchets on its side can be smoothly inserted into the inside of the positioning gear sleeve 331 under the action of the elastic restoring force of the reset spring 334. Thus, with the cooperation of the detection device 1 and the limit slide bar 335, the rotation of the positioning gear sleeve 331 and the winding roller 311 is restricted, so that the wound detection wire harness 4 can be stably stored inside the wire release port 2.

[0033] As Figure 3As shown, a limiting sleeve 333 is fixedly connected to the side of the positioning pawl group wheel 332 away from the positioning gear sleeve 331. A return spring 334 is arranged inside the limiting sleeve 333. One end of the return spring 334 abuts against the inside of the limiting sleeve 333, and the other end of the return spring 334 abuts against the inner wall of the detection device 1. Due to the arrangement of the control pressing block 34, with the cooperation of the return spring 334, pressing the control pressing block 34 can push the positioning pawl group wheel 332 to move through the limiting slide rod 335, so that the pawls on the side of the positioning pawl group wheel 332 are disengaged from the positioning gear sleeve 331, so that the positioning gear sleeve 331 and the winding roller 311 can rotate in the reverse direction under the elastic restoring force of the clockwork spring 313, so as to achieve the purpose of recycling and winding the detection wire harness 4.

[0034] As Figure 3 and Figure 4 As shown, a limiting slide rod 335 is fixedly connected to the side of the positioning pawl group wheel 332 close to the positioning gear sleeve 331. The other end of the limiting slide rod 335 penetrates through the detection device 1 and is fixedly connected to the control pressing block 34. The cross section of the limiting slide rod 335 is polygonal, and the outer surface of the limiting slide rod 335 is smooth and slidably connected to the inside of the detection device 1. Due to the arrangement of the limiting slide rod 335, it is convenient for the staff to push the positioning pawl group wheel 332 through the control pressing block 34, so as to control the connection between the positioning pawl group wheel 332 and its surface pawl and the positioning gear sleeve 331 with the cooperation of the return spring 334, and the rotation of the positioning pawl group wheel 332 and the limiting sleeve 333 can be avoided under the restriction of the detection device 1 on the limiting slide rod 335.

[0035] Furthermore, the shell of the detection device 1 is made of waterproof composite material, which can effectively prevent liquids such as rainwater and moisture from seeping into the equipment, protect the internal electronic components from corrosion and short-circuit risks, and significantly improve the adaptability and reliability of the equipment in various harsh weather and humid environments. The anti-slip texture (not shown in the figure) set on the surface of the detection device increases the surface friction coefficient, enabling the operator to firmly hold the equipment during operation, effectively preventing damage and detection interruption caused by the equipment slipping. The portable handle (not shown in the figure) set on the side solves the problem of inconvenient handling of traditional detection equipment, reduces the labor intensity of the operator, and improves the portability and on-site mobility of the equipment at the same time. The foldable structure (not shown in the figure) design of the handle enables it to be quickly unfolded for use when needed, and can be stored in a specially opened groove (not shown in the figure) on the shell when not in use, which not only avoids the external collision of the handle during transportation and storage, but also optimizes the overall space occupation of the equipment, making the equipment more compact and beautiful, and improving the adaptability of the working scenario and the ergonomic comfort of operation at the same time.

[0036] Furthermore, anti-slip patterns (not shown in the figure) are provided on the surface of the manipulation pressing block 34 to increase the surface friction coefficient, enabling the operator to accurately and stably press and operate even when the hands are wet or wearing gloves during use, effectively preventing misoperations caused by finger slipping, and improving the manipulation accuracy and use safety of the device in various working environments; a dust-proof sealing ring (not shown in the figure) provided between the manipulation pressing block and the housing of the detection device forms an effective sealing barrier, which can prevent dust, tiny particles and water vapor from entering the interior of the device, effectively protecting the internal wire winding components and electrical components from contamination and corrosion, and extending the service life of the device; at the same time, the dust-proof sealing ring can also reduce the impact force generated during pressing, lower the operation noise, enhance the comfort of operation, and maintain the stable performance and reliability of the wire winding system in harsh working environments, ensuring that the cable partial discharge detection device maintains a good working state and detection accuracy for a long time.

[0037] It should be noted that the touch display screen (not shown in the figure) provided on the front panel of the detection device provides an intuitive human-machine interaction interface, and control systems and power supplies and other supporting components can also be set. The above components are electrically connected to each other, and the above components are all commercially available and belong to the prior art, so the principle will not be described in detail here.

[0038] The working principle and usage process of the present utility model are as follows:

[0039] As shown in the figure, when assembling the device, pulling out the detection wire harness 4 of any length can drive the rotation of the wire winding roller 311. Then, under the restriction of the positioning sleeve 312, the clockwork spring 313 is pulled and its elastic restoring force intensity increases. Releasing the detection wire harness 4 can limit the reverse rotation of the wire winding roller 311 under the cooperation of the positioning pawl group wheel 332 and the pawls on its side, ensuring that the released detection wire harness 4 can be kept stable for detection connection.

[0040] Pressing the manipulation pressing block 34 can push the positioning pawl group wheel 332 through the limit slide rod 335 to make the pawls on its side disengage from the positioning gear sleeve 331. At the same time, under the restriction of the limit sleeve 333, the return spring 334 is compressed. At this time, under the restriction of the positioning sleeve 312 and the elastic restoring force of the clockwork spring 313, the wire winding roller 311 can be driven to rotate in the reverse direction, and then the detection wire harness 4 is wound. Finally, releasing the manipulation pressing block 34 can make the positioning pawl group wheel 332 insert into the interior of the positioning gear sleeve 331 under the elastic restoring force of the return spring 334, and make the pawls on its side abut against the interior of the positioning gear sleeve 331 again, keeping the wire winding roller 311 and the detection wire harness 4 wound around it stable.

[0041] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0042] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cable partial discharge detection device, comprising a detection device (1), characterized in that: A wire release opening (2) is provided on the front of the detection device (1). A wire winding assembly (3) is arranged inside the wire release opening (2). A detection wire harness (4) is wound around the outer surface of the wire winding assembly (3). One end of the detection wire harness (4) extends to the outside of the detection device (1) through the wire release opening (2). The wire winding assembly (3) includes a reset assembly (31) movably installed inside the detection device (1) and on the back of the wire release opening (2). The other end of the detection wire harness (4) is connected to the outer surface of the reset assembly (31). A positioning cavity (32) is formed in the middle of the reset assembly (31). A positioning assembly (33) is fixedly sleeved inside the positioning cavity (32). One end of the positioning assembly (33) extends to the outside of the detection device (1) and is connected to a control pressing block (34). One end of the detection wire harness (4) connected to the outer surface of the reset assembly (31) is connected to a detection mechanism inside the detection device (1) through a contact ring fixedly connected inside the detection device (1).

2. The cable partial discharge detection device according to claim 1, characterized in that: The reset assembly (31) includes a wire winding roller (311) movably installed inside the detection device (1). A positioning sleeve (312) is movably sleeved inside the wire winding roller (311). A hairspring (313) is connected between the wire winding roller (311) and the positioning sleeve (312).

3. The cable partial discharge detection device according to claim 2, characterized in that: The cross-section of the wire winding roller (311) is a horizontally placed "U" shape. The cross-section of the positioning sleeve (312) is a horizontally placed "L" shape. Both ends of the wire winding roller (311) are rotatably connected to the inside of the detection device (1) through bearings. The positioning sleeve (312) and the wire winding roller (311) are inserted into each other. One end of the positioning sleeve (312) penetrates through the wire winding roller (311) and is fixedly connected to the inside of the detection device (1).

4. A cable partial discharge detection device according to claim 2, characterized in that: The positioning sleeve (312) is sleeved inside the wire winding roller (311). The middle parts of both the wire winding roller (311) and the positioning sleeve (312) are hollow structures. The positioning cavity (32) is composed of the hollow structures in the middle parts of the wire winding roller (311) and the positioning sleeve (312).

5. The cable partial discharge detection device according to claim 2, characterized in that: The positioning assembly (33) includes a positioning gear sleeve (331) fixedly sleeved on the inner wall of the positioning cavity (32) inside the wire winding roller (311). One end of the positioning gear sleeve (331) is provided with a positioning ratchet wheel group (332). A plurality of uniformly distributed pawls are connected to the side surface of the positioning ratchet wheel group (332) through springs. The opposite surfaces of the positioning gear sleeve (331) and the positioning ratchet wheel group (332) are both conical structures parallel to each other. The inner wall of the positioning gear sleeve (331) and a plurality of pawls on the outer surface of the positioning ratchet wheel group (332) are in mutual abutment.

6. The cable partial discharge detection device according to claim 5, characterized in that: One side of the positioning ratchet wheel group (332) away from the positioning gear sleeve (331) is fixedly connected to a limiting sleeve (333). A reset spring (334) is arranged inside the limiting sleeve (333). One end of the reset spring (334) abuts against the inside of the limiting sleeve (333). The other end of the reset spring (334) abuts against the inner wall of the detection device (1).

7. The cable partial discharge detection device according to claim 5, characterized in that: One side of the positioning pawl group wheel (332) close to the positioning gear sleeve (331) is fixedly connected with a limit slide bar (335). The other end of the limit slide bar (335) penetrates through the detection device (1) and is fixedly connected with the control pressing block (34). The cross section of the limit slide bar (335) is polygonal, and the outer surface of the limit slide bar (335) is smooth and is slidably connected to the inside of the detection device (1).

8. A cable partial discharge detection device according to claim 1, characterized in that: The outer shell of the detection device (1) is made of a waterproof composite material, and anti-slip textures are provided on the surface of the detection device (1). A portable handle is provided on its side surface. The portable handle adopts a foldable structure and can be unfolded during use and stored in a groove correspondingly opened on the outer shell when not in use.

9. The cable partial discharge detection device according to claim 1, characterized in that: Anti-slip patterns are provided on the surface of the control pressing block (34), and a dust-proof sealing ring is arranged between the control pressing block (34) and the outer shell of the detection device (1).

10. A cable partial discharge detection device according to claim 1, characterized in that: A touch display screen is provided on the front panel of the detection device (1), and the touch display screen adopts a high-brightness anti-reflective material.

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