Temperature measuring ring for cable accessory

Abstract

The utility model provides a temperature measuring ring for a cable accessory, which comprises an annular framework, a metal lining is detachably sleeved in the framework, a temperature sensor is embedded on the framework, the temperature sensor is in heat conduction connection with the metal lining, a plurality of elastic structures are uniformly distributed on the inner side wall of the metal lining along the circumferential direction, and the elastic structures are in heat conduction connection with the metal lining. The elastic structure protrudes from the inner side wall of the metal lining. The connection stability of the electric connector and an electric accessory is good, the electric connector is not easy to loosen, and heat can be timely and effectively transmitted to a temperature sensor.

Description

TECHNICAL FIELD

[0001] The utility model relates to cable accessory detection technical field, concretely is a kind of temperature measuring ring for cable accessory. BACKGROUND

[0002] Power accessories play an important role in power systems. They work closely with power equipment to ensure the stable operation of power systems. These accessories include, but are not limited to, cables, transformers, switchgear, arresters, capacitors, circuit breakers, resistors, power isolators, and various fittings used to connect, secure, and protect power equipment and cables. After a long period of use, power accessories may fail, causing their temperature to rise. To ensure the normal operation of the power system, it is necessary to monitor the temperature of the power accessories.

[0003] Referring to the patent with application number CN202220572537.5, the patent discloses an elastic temperature measuring ring. In its technical solution, the ring body used to connect the temperature sensor and the power accessory is made of rubber. Compared with metal, rubber is more susceptible to environmental influences and is prone to aging. For example, in a high-temperature environment, rubber molecules move more vigorously, accelerating the aging process. Under the irradiation of ultraviolet light, rubber molecules undergo photochemical reactions, causing a decline in their performance. After the rubber that constitutes the ring body ages, the elasticity of the ring body weakens, which causes the connection between the temperature measuring end of the temperature sensor and the power accessory to become loose, reducing the thermal conductivity between them and ultimately affecting the accuracy and timeliness of the temperature measurement results.

[0004] In addition, when certain specific faults occur in the cable accessory, such as a broken sheath at a certain point on the cable, only the broken sheath point will exhibit obvious heating. However, in the technical solution of the above-mentioned patent, heat transfer mainly relies on the heat-conducting piece that is in close contact with the cable. Given the poor thermal conductivity of the cable sheath, if the broken sheath point and the heat-conducting piece are not aligned (i.e., staggered) in the circumferential direction, the heat generated by the broken sheath point will be difficult to transfer to the temperature sensor in a timely and effective manner through the heat-conducting piece. SUMMARY

[0005] To overcome the shortcomings of the prior art, the utility model provides a temperature measuring ring for cable accessory, which has good connection stability with power accessories, is not prone to becoming loose, and can timely and effectively transfer heat to the temperature sensor.

[0006] The utility model adopts the following technical solutions.

[0007] The utility model relates to a temperature measuring ring for cable accessory, which comprises a ring-shaped framework, a metal bushing detachably sleeved in the framework, and a temperature sensor embedded on the framework and in thermal conductive connection with the metal bushing.

[0008] Further, the metal bushing comprises a ring-shaped sleeve body, and a plurality of arc-shaped elastic pieces are uniformly distributed on the inner side wall of the sleeve body along the circumference direction, and the long edges of the elastic pieces extend along the circumference direction of the sleeve body and form the elastic structures.

[0009] Further, the metal bushing is in a wave shape that undulates along the radial direction, and the wave crests on the inner side form the elastic structures.

[0010] Further, a positioning hole is formed on the sleeve body, and a positioning member is arranged on the inner side wall of the framework and is in clamping connection with the positioning hole.

[0011] Further, the positioning member penetrates the framework along the radial direction and is in threaded connection with the framework.

[0012] Further, a ring-shaped limiting groove is formed on the inner side wall of the framework, and the metal bushing is located in the limiting groove.

[0013] Further, the framework comprises a ring-shaped frame body, a limiting shoulder extending towards the inner side is arranged at the first end of the frame body, a ring-shaped limiting cover is detachably connected to the second end of the frame body, and the limiting groove is formed between the limiting shoulder and the limiting cover.

[0014] Further, the temperature sensor comprises a protective shell, an antenna layer and an RFID electronic temperature measuring chip are arranged in the protective shell and are in electrical connection with each other, a medium body is filled in the protective shell, the RFID electronic temperature measuring chip is connected with an insulated heat conduction block, the heat conduction block extends to the outer side of the protective shell and is in thermal conductive connection with the metal bushing.

[0015] Further, the heat conduction block is connected with a heat conduction piece, and the heat conduction piece is wound into a ring shape.

[0016] The utility model has the advantages that:

[0017] In the utility model, the inner side wall of metal bushing is evenly distributed with multiple protruding elastic structures in the circumferential direction. In the installation state, the temperature measuring part of the power accessory passes through the inside of the metal bushing, and the elastic structures on the inner side wall of the metal bushing abut against the part of the power accessory, thereby realizing the stable installation of the utility model. In the operation process, the heat generated by the power accessory is sequentially transmitted to the temperature sensor through the elastic structures and the metal accessory, thereby realizing the detection of the temperature of the power accessory. Compared with the traditional rubber ring, the metal bushing of the utility model is not easy to be affected by the external environment and cause aging phenomenon, and the connection stability between the metal bushing and the power accessory is good, and the metal bushing is not easy to become loose. In addition, in view of the fact that multiple elastic structures abut against the outer side wall of the temperature measuring part of the power accessory, the temperature of the temperature measuring part of the cable accessory can be transmitted in a large range in the circumferential direction, thereby timely and effectively transmitting the heat to the temperature sensor. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, other drawings can be obtained by the person skilled in the art without creative labor on the premise of not paying the creative labor.

[0019] Figure 1 It is the structural schematic view of example one.

[0020] Figure 2 It is the structural schematic view of example two.

[0021] Figure 3 It is the structural schematic view of example three.

[0022] Explanation of the drawings:

[0023] Skeletal frame 1, limiting groove 101,

[0024] Frame body 11, limiting cover 12,

[0025] Limiting shoulder 111,

[0026] Metal bushing 2, elastic structure 201,

[0027] Sleeve body 21, elastic sheet 22,

[0028] Positioning hole 211,

[0029] Temperature sensor 3,

[0030] Protective shell 31, antenna layer 32, RFID electronic temperature measuring chip 33, dielectric body 34, heat conduction block 35, heat conduction sheet 36,

[0031] Positioning piece 4. DETAILED DESCRIPTION

[0032] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product.

[0033] It will be understood by those skilled in the art that certain well-known structures and their descriptions may be omitted in the accompanying drawings. The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0034] Example 1

[0035] As attached Figure 1 The temperature measuring ring for cable accessories shown includes an annular frame 1, a metal bushing 2 detachably fitted inside the frame 1, a temperature sensor 3 embedded in the frame 1, the temperature sensor 3 being thermally connected to the metal bushing 2, and a plurality of elastic structures 201 uniformly distributed circumferentially on the inner sidewall of the metal bushing 2, the elastic structures 201 protruding from the inner sidewall of the metal bushing 2.

[0036] In this embodiment, the frame 1 is made of plastic. In the installed state, the part of the electrical accessory to be measured passes through the inside of the metal bushing 2. The elastic structure 201 on the inner wall of the metal bushing 2 abuts against this part of the electrical accessory, thereby securely mounting the metal bushing 2 onto the electrical accessory. Simultaneously, the frame 1 is detachably fitted onto the outside of the metal bushing 2, thus also achieving a secure installation of the frame 1. Furthermore, a temperature sensor 3 is embedded in the frame 1 and thermally connected to the metal bushing 2, ensuring smooth heat transfer between the temperature sensor 3 and the electrical accessory.

[0037] The metal bushing 2 includes an annular sleeve 21. Multiple arc-shaped elastic sheets 22 are evenly distributed circumferentially along the inner wall of the sleeve 21. The long sides of the elastic sheets 22 extend circumferentially along the sleeve 21, forming an elastic structure 201. In this embodiment, the elastic sheets 22 are welded to the sleeve 21. Of course, in other embodiments, the elastic sheets 22 can also be directly punched out from the sleeve 21.

[0038] The sleeve 21 has a positioning hole 211, and the inner sidewall of the frame 1 has a positioning element 4 that engages with the positioning hole 211. In the installed state, the positioning element 4 extends into the positioning hole 211, thereby connecting the frame 1 and the metal bushing 2 together and preventing relative displacement between the two. In this embodiment, the positioning element 4 is a screw.

[0039] In this embodiment, for ease of installation, the positioning element 4 penetrates the frame 1 radially and is threadedly connected to the frame 1. In other embodiments, the positioning element 4 and the frame 1 can also be integrally connected.

[0040] The temperature sensor 3 comprises a protective shell 31, an antenna layer 32 and an RFID electronic temperature measuring chip 33 are arranged in the protective shell 31 and electrically connected with each other, a medium body 34 is filled in the protective shell 31, the RFID electronic temperature measuring chip 33 is connected with an insulated heat-conducting block 35, the heat-conducting block 35 extends to the outside of the protective shell 31 and is in heat-conducting connection with the metal bushing 2.

[0041] In the installed state, the heat-conducting block 35 abuts against the sleeve body 21 of the metal bushing 2, and the heat generated by the power accessory is transmitted to the RFID electronic temperature measuring chip 33 through the elastic sheet 22, the sleeve body 21 and the heat-conducting block 35 in turn. In this embodiment, the heat-conducting block 35 is made of ceramic. The insulated heat-conducting block 35 can insulate the RFID electronic temperature measuring chip 33 from the power accessory, preventing the RFID electronic temperature measuring chip 33 from being punctured by the current on the power accessory.

[0042] Embodiment Two

[0043] The same parts in this embodiment as in Embodiment One are given the same reference numerals, and the same textual description is omitted.

[0044] Compared with Embodiment One, the metal bushing 2 of this embodiment has the following different structural design:

[0045] As shown in the accompanying drawings, Figure 2 the inner side wall of the framework 1 is provided with an annular limiting groove 101, and the metal bushing 2 is located in the limiting groove 101 and is limited in the axial direction by the limiting groove 101.

[0046] In this embodiment, in order to facilitate the disassembly and assembly of the framework 1 and the metal bushing 2, the framework 1 comprises an annular frame body 11, a first end of the frame body 11 is provided with an inwardly extending limiting shoulder 111, and a second end of the frame body 11 is detachably connected with an annular limiting cover 12, and the limiting shoulder 111 and the limiting cover 12 form the limiting groove 101. The connection between the frame body 11 and the limiting cover 12 can be screw connection, clamping or other connection modes, which will not be described in detail here.

[0047] Embodiment Three

[0048] The same parts in this embodiment as in Embodiment One are given the same reference numerals, and the same textual description is omitted.

[0049] Compared with Embodiment Two, the metal bushing 2 of this embodiment has the following different structural design:

[0050] As shown in the accompanying drawings, Figure 3 the metal bushing 2 is in a wave shape that undulates in the radial direction, and the inner side wave crest constitutes an elastic structure 201.

[0051] Compared with the second embodiment, the heat conducting block 35 of the present embodiment is further connected with a heat conducting sheet 36, which is wound into a ring shape and is clamped with the wave valleys on the outer side of the metal bush 2, so that the skeleton 1 and the temperature sensor 3 can be positioned in the circumferential direction, and the heat conducting block 35 can not be in poor heat conducting contact with the metal bush 2 due to being just opposite to the wave valleys on the outer side of the metal bush 2.

[0052] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the implementation modes are not required or can not be exhausted. Any modification, equivalent replacement and improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A temperature measuring ring for cable accessories, characterized in that, The device includes a ring-shaped frame, a metal bushing detachably fitted inside the frame, a temperature sensor embedded in the frame, the temperature sensor being thermally connected to the metal bushing, and multiple elastic structures evenly distributed circumferentially on the inner sidewall of the metal bushing, the elastic structures protruding from the inner sidewall of the metal bushing.

2. The temperature measuring ring for cable accessories according to claim 1, characterized in that, The metal bushing includes an annular sleeve body, and multiple arc-shaped elastic sheets are evenly distributed along the circumference of the inner sidewall of the sleeve body. The long sides of the elastic sheets extend along the circumference of the sleeve body and form an elastic structure.

3. A temperature measuring ring for cable accessories according to claim 1, characterized in that, The metal bushing is a radially undulating wave shape, with the inner crests forming an elastic structure.

4. A temperature measuring ring for cable accessories according to claim 2, characterized in that, The sleeve has a positioning hole, and the inner side wall of the skeleton has a positioning component that engages with the positioning hole.

5. A temperature measuring ring for cable accessories according to claim 4, characterized in that, The positioning element penetrates the skeleton radially and is threadedly connected to the skeleton.

6. A temperature measuring ring for cable accessories according to claim 2 or 3, characterized in that, The inner wall of the skeleton is provided with an annular limiting groove, and the metal bushing is located in the limiting groove.

7. A temperature measuring ring for cable accessories according to claim 6, characterized in that, The frame includes an annular frame, with a limiting shoulder extending inward at the first end of the frame and an annular limiting cover detachably connected to the second end of the frame, forming a limiting groove between the limiting shoulder and the limiting cover.

8. A temperature measuring ring for cable accessories according to claim 1, characterized in that, The temperature sensor includes a protective shell, inside which are an antenna layer and an RFID electronic temperature measuring chip electrically connected to each other. The protective shell is filled with a dielectric material, and the RFID electronic temperature measuring chip is connected to an insulating heat-conducting block. The heat-conducting block extends to the outside of the protective shell and is thermally connected to a metal bushing.

9. A temperature measuring ring for cable accessories according to claim 8, characterized in that, The heat-conducting block is connected to a heat-conducting sheet, which is wound into a ring.

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