Built-in cable partial discharge on-line monitoring device for power transmission line

Abstract

The invention provides a built-in cable partial discharge on-line monitoring device for a power transmission line, and belongs to the technical field of partial discharge monitoring, and the built-in cable partial discharge on-line monitoring device for the power transmission line comprises a shell divided into two halves and a partial discharge sensor located in the shell; the mounting plates are fixed on the two sides of the two half shells; a plurality of inserting rods are fixed on the inner side of the mounting plate on the half shell at intervals, and limiting blocks are fixed at the end parts of the inserting rods; the inner side of the mounting plate on the other half shell is provided with a slot for the insertion of the insertion rod and the limiting block; a clamping block is arranged in the slot in a sliding manner and is used for allowing the limiting block to pass through or limiting the limiting block; when the two groups of mounting plates are attached to each other, the clamping blocks are attached to and limit the limiting blocks; the mounting plate is provided with a sliding assembly used for driving all the clamping blocks to slide synchronously, and the mounting plate is provided with a positioning mechanism used for positioning the clamping blocks at the positions where the clamping blocks are attached to the limiting blocks in a limiting mode. The shell can be disassembled and assembled more conveniently, and the device maintenance efficiency is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of partial discharge monitoring, and more specifically, relates to an in-built cable partial discharge on-line monitoring device for transmission lines. Background Art

[0002] The in-built cable partial discharge on-line monitoring system is mainly used to monitor the partial discharge signals occurring in high-voltage cables and the high-voltage equipment connected thereto. This system is an independent and distributed partial discharge detection system, which uses a flexible networking method for data transmission, and on-line monitors the partial discharge of the cable system in real time. Through the in-built cable partial discharge analysis system, the insulation state of the system is evaluated to predict the development trend of the partial discharge, prevent sudden electrical accidents, and provide effective data basis for the condition-based maintenance and repair of equipment.

[0003] The in-built cable partial discharge monitoring technology is to install the partial discharge sensor inside the cable joint, and the partial discharge signal is induced through the capacitive coupling method, which solves the practical problems of large partial discharge interference signals of the partial discharge sensor and inaccurate fault location, and improves the accuracy and stability of the partial discharge equipment. The system mainly includes five parts: the cable partial discharge monitoring host, the external partial discharge concentrator, the in-built partial discharge acquisition module, and the in-built partial discharge sensor.

[0004] There is a Chinese patent with the reference publication number CN110940895A, which discloses a cable joint explosion-proof fire extinguishing and temperature and partial discharge comprehensive on-line monitoring device, including an explosion-proof housing that hermetically wraps and fixes the cable joint to be detected by upper and lower covers, and a control unit as an information processing center is detachably and fixedly installed outside the explosion-proof housing. The control unit is electrically connected to a water level sensor, a displacement sensor, a temperature sensing unit and a temperature control unit, as well as a fire extinguishing device, a partial discharge sensor, and the monitoring information collected by the control unit is periodically sent to the monitoring center through an NB communication antenna connected to the control unit, and a built-in battery for power supply.

[0005] The above-mentioned patent and the explosion-proof housings on the market generally include a housing divided into two halves up and down, connecting ears fixed on both sides of the two halves of the housing, and bolts and nuts for fixing the two groups of connecting ears, so as to realize the detachable fixation of the explosion-proof housing. However, in order to ensure the sealing performance of the housing, multiple groups of bolts and nuts need to be arranged at intervals on each group of connecting ears, resulting in cumbersome disassembly and assembly of the housing and affecting the maintenance efficiency of the device. Summary of the Invention

[0006] The purpose of the present invention is to provide an in-built cable partial discharge on-line monitoring device for transmission lines, so as to solve the technical problem that the disassembly and assembly of the housing in the prior art are cumbersome and affect the maintenance efficiency of the device.

[0007] To achieve the above object, the technical solution adopted by the present invention is: to provide an in-line partial discharge monitoring device for a transmission line cable, including a housing divided into two halves and a partial discharge sensor located inside the housing, the partial discharge sensor is installed on the cable connector; it also includes mounting plates fixed on both sides of the two halves of the housing, and the mounting plates on different housings are divided into two groups and are arranged in a facing and fitting manner; a plurality of insertion rods are fixedly spaced inside the mounting plate on one half of the housing, and a limit block is fixed at the end of the insertion rod; a slot for inserting the insertion rod and the limit block is opened inside the mounting plate on the other half of the housing; a clamping block is slidably arranged in the slot, and the clamping block is used for the limit block to pass through or limit the limit block; when the two groups of mounting plates are mutually attached, the clamping block fits and limits the limit block; a sliding component for driving all the clamping blocks to slide synchronously is arranged on the mounting plate, and a positioning mechanism for positioning the clamping block at a position where it keeps fitting and limiting the limit block is arranged on the mounting plate.

[0008] Combined with the above technical solution, in a possible implementation manner, the sliding component includes a moving plate, a pushing plate and a connecting rod, a moving groove communicating with all the slots is opened inside the mounting plate, the moving plate is slidably arranged in the moving groove and is fixed to all the clamping blocks; the pushing plate is located outside the mounting plate, a connecting groove communicating with the moving groove is opened on the outside of the mounting plate, and the connecting rod is slidably arranged in the connecting groove and is fixed between the moving plate and the pushing plate.

[0009] Combined with the above technical solution, in a possible implementation manner, the positioning mechanism includes a ratchet tooth, a lifting shell, a ratchet pawl, a reset component and a positioning component; the ratchet tooth is fixed on the side of the moving plate facing the pushing plate, the lifting shell is slidably arranged outside the mounting plate and communicates with the moving groove, the ratchet pawl is arranged inside the lifting shell and meshes with the ratchet tooth, and the sliding direction of the lifting shell is parallel to the rotation axis of the ratchet pawl; when the ratchet tooth meshes with the ratchet pawl, the moving plate can only drive the clamping block to slide in the direction of fitting and limiting the limit block; the reset component is arranged on the mounting plate and acts on the lifting shell, and the reset component is used to maintain the meshing state of the ratchet pawl and the ratchet tooth; the positioning component is arranged between the mounting plate and the lifting shell, and the positioning component is used to position or release the positioning of the lifting shell at a position where the ratchet pawl and the ratchet tooth are in a separated state.

[0010] Combined with the above technical solution, in a possible implementation manner, the reset component includes a reset plate and a reset spring, the reset plate is fixed on the outside of the mounting plate, and the reset spring is connected between the reset plate and the lifting shell; when the reset spring is in a natural state, the ratchet tooth and the ratchet pawl are in a meshing state.

[0011] In combination with the above technical solution, in a possible implementation method, the positioning assembly includes a fixed shell, a positioning block, a positioning spring, a vertical plate and a pull rod; the fixed shell is fixed to the outside of the mounting plate and is arranged toward the mounting plate opening, the positioning block is slidably arranged at the opening of the fixed shell, and the positioning spring is arranged in the fixed shell and connected to the positioning block; the vertical plate is fixed to the lifting shell and is provided with a positioning groove for the positioning block to be inserted; when the positioning block is simultaneously located in the fixed shell and the positioning groove, the positioning spring is in a natural state, and the ratchet and the pawl are in a separated state; the pull rod is slidably connected to the fixed shell and connected to the positioning block, the outer end of the pull rod extends to the outside of the push plate, and the push plate is provided with a first sliding hole for the pull rod to pass through and generate relative sliding.

[0012] In combination with the above technical solution, in a possible implementation method, the pull rod and the positioning block are rotatably connected, and a rotating block located on the outside of the push plate is fixed to the outer end of the pull rod. The rotating block can be rotated to fit with the outer wall of the push plate, and a second sliding hole connected to the first sliding hole is opened on the outside of the push plate; when the positioning block is inserted into the positioning groove, the rotating block is inserted into the second sliding hole.

[0013] In combination with the above technical solution, in a possible implementation method, a blocking block is fixed to the outer wall of the push plate, and the blocking block is opposite to the middle position of the second sliding hole; when the locking block and the limit block are in a separated or limited state, the rotating block is used to fit with different sides of the blocking block to limit the movement of the push plate.

[0014] In combination with the above technical solution, in a possible implementation, the mounting plate having the movable groove is divided into two halves along the movable groove, wherein one half of the mounting plate is fixed on the shell, and a connecting piece is detachably fixed between the two halves of the mounting plate.

[0015] In combination with the above technical solution, in a possible implementation method, the half of the mounting plate close to the dividing surface of the shell is fixed to the shell, and the connecting member is a bolt. The connecting member passes through the half of the mounting plate away from the cutting surface of the shell and is threadedly connected to the other half of the mounting plate.

[0016] In combination with the above technical solution, in a possible implementation method, a connecting plate and a plurality of connecting screws are arranged between the ratchet and the movable plate, the connecting plate is attached to the ratchet and the movable plate, and the connecting screws pass through the connecting plate and are threadedly connected to the ratchet and the movable plate respectively.

[0017] The beneficial effects of the built-in cable partial discharge on-line monitoring device for transmission lines provided by the present invention are as follows: Compared with the prior art, when installing the two half shells of the present invention, all the clamping blocks are driven to slide out of the way in advance by the sliding assembly, and the two half shells are buckled. The insertion rod and the limiting block on one set of mounting plates are inserted into the slots on the other set of mounting plates and are clamped by the clamping blocks; after the two half shells are buckled, all the clamping blocks are driven by the sliding assembly to reset to limit the limiting block. At this time, the two half shells are in a relatively fixed state, and then the position of the clamping blocks is fixed by the positioning mechanism to further improve the firmness of the shell after installation; when disassembling the shell, first release the fixation of the clamping blocks by the positioning mechanism, and then drive all the clamping blocks to disengage from the limiting block by the sliding assembly, and the two half shells can be separated, making the disassembly and assembly of the shell more convenient and improving the device maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the prior art descriptions. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a schematic structural diagram of the built-in cable partial discharge on-line monitoring device for transmission lines provided by the embodiment of the present invention;

[0020] Figure 2 It is a vertical sectional view of the internal structure of the mounting plate, the sliding assembly and the positioning mechanism provided by the embodiment of the present invention;

[0021] Figure 3 It is a horizontal sectional view of the internal structure of the mounting plate, the sliding assembly and the positioning mechanism provided by the embodiment of the present invention;

[0022] Figure 4 It is a partial side view of the cooperation state of the rotating block and the blocking block provided by the embodiment of the present invention;

[0023] Figure 5 It is a partial sectional view of the connecting plate and the connecting screw provided by the embodiment of the present invention.

[0024] Among them, the reference numerals in the drawings are as follows:

[0025] 1. Housing; 2. Mounting plate; 21. Plug rod; 22. Limiting block; 23. Slot; 24. Clamping block; 25. Moving groove; 26. Connecting groove; 27. Connecting piece; 3. Sliding assembly; 31. Moving plate; 32. Pushing plate; 321. First sliding hole; 322. Second sliding hole; 323. Blocking block; 33. Connecting rod; 4. Positioning mechanism; 41. Ratchet tooth; 42. Lifting housing; 43. Pawl; 44. Reset assembly; 441. Reset plate; 442. Reset spring; 45. Positioning assembly; 451. Fixed housing; 452. Positioning block; 453. Positioning spring; 454. Vertical plate; 4541. Positioning groove; 455. Pull rod; 456. Rotating block; 5. Connecting plate; 51. Connecting screw. Detailed implementation manners

[0026] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0027] It should be further noted that the drawings and embodiments of the present invention mainly describe and explain the concept of the present invention. On the basis of this concept, the specific forms and settings of some connection relationships, position relationships, power mechanisms, power supply systems, hydraulic systems and control systems may not be fully described. However, on the premise that those skilled in the art understand the concept of the present invention, those skilled in the art can adopt well-known ways to implement the above specific forms and settings.

[0028] When an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0029] The orientation words "inside" and "outside" refer to the inside and outside of the contour of each component itself. The terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0030] For ease of description, spatial relative terms such as "above", "over", "on the upper surface", "upper", etc. can be used here to describe the spatial positional relationship of a device or feature shown in the figure with other devices or features. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figure for the device. For example, if the device in the figure is inverted, a device described as "above" or "over" other devices or structures will then be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device can also be positioned in other different ways, and corresponding interpretations are made for the spatial relative descriptions used here.

[0031] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more, and "several" means one or more, unless otherwise specifically defined.

[0032] Now, the in-line partial discharge monitoring device for transmission lines provided by the present invention will be described.

[0033] As Figure 1 and Figure 2 shown, an embodiment of the present invention provides an in-line partial discharge monitoring device for transmission lines, which includes a housing 1 divided into two halves and a partial discharge sensor located inside the housing 1. The partial discharge sensor is installed on the cable connector; it also includes mounting plates 2 fixed on both sides of the two halves of the housing 1. The mounting plates 2 on different housings 1 are divided into two groups and are arranged opposite and in contact with each other; a plurality of insertion rods 21 are fixedly spaced inside the mounting plate 2 on one half of the housing 1, and a limit block 22 is fixed at the end of the insertion rod 21; a slot 23 for inserting the insertion rod 21 and the limit block 22 is opened inside the mounting plate 2 on the other half of the housing 1; a clamping block 24 is slidably arranged in the slot 23, and the clamping block 24 is used for the limit block 22 to pass through or to limit the limit block 22; when the two groups of mounting plates 2 are in contact with each other, the clamping block 24 limits the limit block 22 in contact; a sliding component 3 for driving all the clamping blocks 24 to slide synchronously is arranged on the mounting plate 2, and a positioning mechanism 4 for positioning the clamping block 24 at a position where it keeps the limit block 22 in contact and limited is arranged on the mounting plate 2.

[0034] The built-in cable partial discharge online monitoring device for transmission lines provided by this embodiment, compared with the prior art, when installing the two half-cases 1, the sliding component 3 is used to drive all the clamping blocks 24 to slide and make way in advance, and the two half-cases 1 are buckled. The insertion rod 21 and the limiting block 22 on one set of mounting plates 2 are inserted into the slots 23 on the other set of mounting plates 2 and are blocked by the clamping blocks 24; after the two half-cases 1 are buckled, the sliding component 3 is used to drive all the clamping blocks 24 to reset to limit the limiting block 22. At this time, the two half-cases 1 are in a relatively fixed state, and then the positioning mechanism 4 is used to fix the positions of the clamping blocks 24 to further improve the firmness of the case 1 after installation; when disassembling the case 1, first release the fixation of the clamping blocks 24 through the positioning mechanism 4, and then drive all the clamping blocks 24 to disengage from the limiting block 22 through the sliding component 3, and the two half-cases 1 can be separated, making the disassembly and assembly of the case 1 more convenient and improving the device maintenance efficiency.

[0035] As Figures 2 to 3 shown, a specific embodiment provided by the present invention on the basis of the above embodiment is as follows:

[0036] The sliding component 3 includes a moving plate 31, a pushing plate 32 and a connecting rod 33. A moving groove 25 communicating with all the slots 23 is formed inside the mounting plate 2. The moving plate 31 is slidably arranged in the moving groove 25 and is fixed to all the clamping blocks 24; the pushing plate 32 is located outside the mounting plate 2. A connecting groove 26 communicating with the moving groove 25 is formed outside the mounting plate 2. The connecting rod 33 is slidably arranged in the connecting groove 26 and is fixed between the moving plate 31 and the pushing plate 32.

[0037] Before installing the case 1, push the pushing plate 32 to drive the moving plate 31 to move in the moving groove 25 through the connecting rod 33, so that the moving plate 31 can drive all the clamping blocks 24 to move and make way. The structure is simple and the cost is low, improving the synchronous movement efficiency of all the clamping blocks 24.

[0038] As Figures 2 to 3 shown, a specific embodiment provided by the present invention on the basis of the above embodiment is as follows:

[0039] The positioning mechanism 4 includes a ratchet 41, a lifting housing 42, a ratchet pawl 43, a reset assembly 44, and a positioning assembly 45; the ratchet 41 is fixed on the side of the moving plate 31 facing the push plate 32, the lifting housing 42 is slidably arranged outside the mounting plate 2 and communicated with the moving groove 25, the ratchet pawl 43 is arranged inside the lifting housing 42 and meshes with the ratchet 41, and the sliding direction of the lifting housing 42 is parallel to the rotation axis of the ratchet pawl 43; when the ratchet 41 meshes with the ratchet pawl 43, the moving plate 31 can only drive the latch 24 to slide in the direction of fitting and limiting the limiting block 22; the reset assembly 44 is arranged on the mounting plate 2 and acts on the lifting housing 42, and the reset assembly 44 is used to maintain the meshing state of the ratchet pawl 43 and the ratchet 41; the positioning assembly 45 is arranged between the mounting plate 2 and the lifting housing 42, and the positioning assembly 45 is used to position or release the positioning of the lifting housing 42 at the position where the ratchet pawl 43 and the ratchet 41 are in a separated state.

[0040] Before installing the housing 1, press the lifting housing 42 to drive the ratchet pawl 43 to separate from the ratchet 41, and the positioning assembly 45 positions the lifting housing 42 to the state where the ratchet pawl 43 and the ratchet 41 are separated, then the push plate 32 can be pushed to make way for the latch 24; after the latch 24 makes way, the two half-housings 1 are buckled. After the insertion rod 21 drives the limiting block 22 through the latch 24, the positioning assembly 45 releases the positioning of the lifting housing 42, and the reset assembly 44 drives the positioning housing to reset until the ratchet pawl 43 meshes with the ratchet 41 again. At this time, the push plate 32 can be pushed to move the latch 24 to limit the limiting block 22. The cooperation between the ratchet 41 and the ratchet pawl 43 fixes the latch 24 at the position of limiting the limiting block 22, improving the operation convenience and the stability after the housing 1 is installed.

[0041] As Figure 2 shown, a specific embodiment provided by the present invention on the basis of the above embodiment is as follows:

[0042] The reset assembly 44 includes a reset plate 441 and a reset spring 442. The reset plate 441 is fixed outside the mounting plate 2, and the reset spring 442 is connected between the reset plate 441 and the lifting housing 42; when the reset spring 442 is in a natural state, the ratchet 41 and the ratchet pawl 43 are in a meshing state.

[0043] When the lifting housing 42 is pressed, the reset spring 442 is compressed. When the positioning assembly 45 releases the positioning of the lifting housing 42, the restoring force of the reset spring 442 drives the lifting housing 42 to reset, improving the reset efficiency of the lifting housing 42.

[0044] As Figures 2 to 3 shown, a specific embodiment provided by the present invention on the basis of the above embodiment is as follows:

[0045] The positioning component 45 includes a fixed housing 451, a positioning block 452, a positioning spring 453, a vertical plate 454, and a pull rod 455; the fixed housing 451 is fixed to the outside of the mounting plate 2 and is arranged to open towards the mounting plate 2, the positioning block 452 is slidably arranged at the opening of the fixed housing 451, and the positioning spring 453 is arranged inside the fixed housing 451 and connected to the positioning block 452; the vertical plate 454 is fixed to the lifting housing 42 and is provided with a positioning groove 4541 for the positioning block 452 to insert; when the positioning block 452 is simultaneously located inside the fixed housing 451 and the positioning groove 4541, the positioning spring 453 is in a natural state, and the ratchet 41 and the ratchet pawl 43 are in a separated state; the pull rod 455 is slidably connected to the fixed housing 451 and connected to the positioning block 452, and the outer end of the pull rod 455 extends to the outside of the push plate 32, and the push plate 32 is provided with a first sliding hole 321 for the pull rod 455 to pass through and generate relative sliding.

[0046] Before installing the housing 1, press the vertical plate 454 to drive the lifting housing 42 and the ratchet pawl 43 to separate from the ratchet 41. At this time, the positioning groove 4541 on the vertical plate 454 moves to communicate with the fixed housing 451, and the elastic force of the positioning spring 453 drives the outer end of the positioning block 452 to insert into the positioning groove 4541 to realize the positioning of the lifting housing 42. At this time, the ratchet pawl 43 and the ratchet 41 are in a separated state, and then the push plate 32 can be pushed to install the housing 1.

[0047] After the housing 1 is buckled, pull the pull rod 455 to drive the positioning block 452 to disengage from the positioning groove 4541. The return spring 442 drives the lifting housing 42 to reset upward, realizing the re-engagement of the ratchet pawl 43 and the ratchet 41. After releasing the pull rod 455, the positioning spring 453 makes the positioning block 452 press tightly against the vertical plate 454, which can cooperate with the return spring 442 to improve the stability of the lifting housing 42, and further improve the meshing stability of the ratchet 41 and the ratchet pawl 43; at this time, the push plate 32 can be pushed to drive all the clamping blocks 24 to limit the limiting block 22, and the pull rod 455 generates a relative displacement with the first sliding hole 321, finally improving the disassembly and assembly convenience of the housing 1.

[0048] As Figure 2 and Figure 4 shown, on the basis of the above-mentioned embodiment, the present invention further provides a specific embodiment as follows:

[0049] The pull rod 455 is rotatably connected to the positioning block 452, and a rotating block 456 located outside the push plate 32 is fixed to the outer end of the pull rod 455. The rotating block 456 can be rotated to fit against the outer side wall of the push plate 32, and a second sliding hole 322 communicating with the first sliding hole 321 is opened on the outer side of the push plate 32; when the positioning block 452 is inserted into the positioning groove 4541, the rotating block 456 is inserted into the second sliding hole 322.

[0050] When the positioning block 452 is completely located inside the fixed housing 451, the rotating block 456 rotates to fit against the outer side wall of the push plate 32. The frictional force between the two can improve the stability of the push plate 32 and reduce the possibility of the push plate 32 moving due to external factors.

[0051] Before disassembling and assembling the housing 1, rotate the rotating block 456 so that it faces the second sliding hole 322. Then, press the vertical plate 454 to connect the positioning groove 4541 with the fixed housing 451. After that, the pull rod 455 drives the rotating block 456 to slide into the second sliding hole 322. When the push plate 32 is pushed, a relative displacement occurs between the rotating block 456 and the second sliding hole 322.

[0052] As Figure 2 and Figure 4 shown, on the basis of the above embodiments, the present invention further provides a specific embodiment as follows:

[0053] A blocking block 323 is fixed on the outer side wall of the push plate 32, and the blocking block 323 faces the middle position of the second sliding hole 322. When the clamping block 24 and the limiting block 22 are in a separated or limited state, the rotating block 456 is used to fit against different side surfaces of the blocking block 323 to limit the movement of the push plate 32.

[0054] Specifically, Figure 4 in

[0055] the clamping block 24 and the limiting block 22 are in a limited state. At this time, the cooperation between the rotating block 456 and the blocking block 323 makes the push plate 32 unable to move to the right, that is, the clamping block 24 cannot move in the direction of disengaging from the limiting block 22, which can form a double cooperation guarantee with the ratchet teeth 41 and the ratchet pawl 43, further improving the stability of the housing 1 after installation.

[0056] As Figure 2 shown, on the basis of the above embodiments, the present invention further provides a specific embodiment as follows:

[0057] The mounting plate 2 with the moving groove 25 is divided into two halves along the moving groove 25. One half of the mounting plate 2 is fixed on the housing 1, and a connecting member 27 is detachably fixed between the two halves of the mounting plate 2.

[0058] Half of the mounting plate 2 close to the dividing surface of the housing 1 is fixed to the housing 1. The connecting member 27 is a bolt. The connecting member 27 passes through the half of the mounting plate 2 away from the cutting surface of the housing 1 and is threadedly connected to the other half of the mounting plate 2.

[0059] By turning the connecting member 27, the disassembly and assembly of the two half mounting plates 2 can be achieved, thereby facilitating the maintenance or replacement of the clamping block 24, the moving plate 31, and the ratchet 41.

[0060] As Figure 5 shown, on the basis of the above embodiments, the present invention further provides a specific embodiment as follows:

[0061] A connecting plate 5 and a plurality of connecting screws 51 are provided between the ratchet 41 and the moving plate 31. The connecting plate 5 is attached to the ratchet 41 and the moving plate 31. After passing through the connecting plate 5, the connecting screws 51 are respectively threadedly connected to the ratchet 41 and the moving plate 31.

[0062] By turning the connecting screws 51, the connecting plate 5 can be removed to facilitate the separation, maintenance, or replacement of the moving plate 31 and the ratchet 41.

[0063] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0064] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0065] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that for the convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and devices should be regarded as part of the specification. In all the examples shown and discussed herein, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

Claims

1. A built-in cable partial discharge online monitoring device for a power transmission line, comprising a housing (1) divided into two halves and a partial discharge sensor located in the housing (1); characterized in that: The invention also comprises a mounting plate (2) fixed on both sides of the two halves of the shell (1); a plurality of insertion rods (21) are fixed at intervals on the inner side of the mounting plate (2) on one half of the shell (1), and a limit block (22) is fixed at the end of the insertion rod (21); a slot (23) for inserting the insertion rod (21) is provided on the inner side of the mounting plate (2) on the other half of the shell (1); a card block (24) is slidably arranged in the slot (23), and the card block (24) is used for allowing the limit block (22) to pass through or for limiting the limit block (22); when the two groups of mounting plates (2) are attached to each other, the card block (24) is attached to the limit block (22); a sliding assembly (3) for driving all the card blocks (24) to slide synchronously is arranged on the mounting plate (2), and a positioning mechanism (4) for positioning the card block (24) at a position where it is attached to the limit block (22).

2. The built-in cable partial discharge online monitoring device for a power transmission line according to claim 1, characterized in that: The sliding assembly (3) comprises a moving plate (31), a push plate (32) and a connecting rod (33); a moving groove (25) connected to all the slots (23) is provided inside the mounting plate (2); the moving plate (31) is slidably arranged in the moving groove (25) and is fixed to all the clamping blocks (24); the push plate (32) is located on the outside of the mounting plate (2); a connecting groove (26) connected to the moving groove (25) is provided on the outside of the mounting plate (2); the connecting rod (33) is slidably arranged in the connecting groove (26) and is fixed between the moving plate (31) and the push plate (32).

3. The built-in cable partial discharge online monitoring device for a power transmission line according to claim 2, characterized in that: The positioning mechanism (4) comprises a ratchet (41), a lifting shell (42), a pawl (43), a reset assembly (44) and a positioning assembly (45); the ratchet (41) is fixed on the side of the moving plate (31) facing the push plate (32); the lifting shell (42) is slidably arranged on the outside of the mounting plate (2) and connected to the moving groove (25); the pawl (43) is arranged in the lifting shell (42) and meshes with the ratchet (41); the sliding direction of the lifting shell (42) is parallel to the rotation axis of the pawl (43); when the ratchet (41) is meshed with the pawl (43), the The movable plate (31) can only drive the clamping block (24) to slide in the direction of fitting and limiting the limiting block (22); the reset component (44) is arranged on the mounting plate (2) and acts on the lifting shell (42), and the reset component (44) is used to maintain the meshing state of the pawl (43) and the ratchet (41); the positioning component (45) is arranged between the mounting plate (2) and the lifting shell (42), and the positioning component (45) is used to position or release the lifting shell (42) at a position where the pawl (43) and the ratchet (41) are in a separated state.

4. The built-in cable partial discharge online monitoring device for a power transmission line according to claim 3, characterized in that: The reset assembly (44) comprises a reset plate (441) and a reset spring (442); the reset plate (441) is fixed on the outside of the mounting plate (2); the reset spring (442) is connected between the reset plate (441) and the lifting shell (42); when the reset spring (442) is in a natural state, the ratchet (41) and the pawl (43) are in an engaged state.

5. The built-in cable partial discharge online monitoring device for a power transmission line according to claim 3, characterized in that: The positioning assembly (45) comprises a fixed shell (451), a positioning block (452), a positioning spring (453), a vertical plate (454) and a pull rod (455); the fixed shell (451) is fixed to the outside of the mounting plate (2) and is arranged toward the opening of the mounting plate (2); the positioning block (452) is slidably arranged at the opening of the fixed shell (451); the positioning spring (453) is arranged in the fixed shell (451) and is connected to the positioning block (452); the vertical plate (454) is fixed to the lifting shell (42) and is provided with a vertical plate for the positioning block (452) to move. ) is inserted into the positioning groove (4541); when the positioning block (452) is located in the fixed shell (451) and the positioning groove (4541) at the same time, the positioning spring (453) is in a natural state, and the ratchet (41) and the pawl (43) are in a separated state; the pull rod (455) is slidably connected to the fixed shell (451) and connected to the positioning block (452), and the outer end of the pull rod (455) extends to the outside of the push plate (32), and the push plate (32) is provided with a first sliding hole (321) for the pull rod (455) to pass through and generate relative sliding.

6. The internal cable partial discharge online monitoring device for a power transmission line according to claim 5, characterized in that: The pull rod (455) and the positioning block (452) are rotatably connected, and a rotating block (456) located on the outside of the push plate (32) is fixed to the outer end of the pull rod (455). The rotating block (456) can be rotated to fit with the outer wall of the push plate (32), and a second sliding hole (322) connected to the first sliding hole (321) is opened on the outside of the push plate (32); when the positioning block (452) is inserted into the positioning groove (4541), the rotating block (456) is inserted into the second sliding hole (322).

7. The internal cable partial discharge online monitoring device for a power transmission line according to claim 6, characterized in that: A blocking block (323) is fixed to the outer wall of the push plate (32), and the blocking block (323) is directly opposite to the middle position of the second sliding hole (322); when the clamping block (24) and the limiting block (22) are in a separated or limited state, the rotating block (456) is used to fit with different side surfaces of the blocking block (323) to limit the movement of the push plate (32).

8. The internal cable partial discharge online monitoring device for a power transmission line according to claim 3, characterized in that: The mounting plate (2) having the movable groove (25) is divided into two halves along the movable groove (25), wherein one half of the mounting plate (2) is fixed on the housing (1), and a connecting piece (27) is detachably fixed between the two halves of the mounting plate (2).

9. The internal cable partial discharge online monitoring device for a power transmission line according to claim 8, characterized in that: The half of the mounting plate (2) close to the split surface of the shell (1) is fixed to the shell (1), and the connecting member (27) is a bolt. The connecting member (27) penetrates the half of the mounting plate (2) away from the cut surface of the shell (1) and is threadedly connected to the other half of the mounting plate (2).

10. The internal cable partial discharge online monitoring device for a power transmission line according to claim 8, characterized in that: A connecting plate (5) and a plurality of connecting screws (51) are provided between the ratchet (41) and the movable plate (31); the connecting plate (5) is attached to the ratchet (41) and the movable plate (31); and the connecting screws (51) penetrate the connecting plate (5) and are respectively threadedly connected to the ratchet (41) and the movable plate (31).

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