CN215600176U - Transformer overvoltage release device - Google Patents

Abstract

The utility model provides an overvoltage release device of a transformer, which comprises a frame body and an arrester unit, wherein the frame body is made of an insulating material, the frame body comprises a plurality of groups of radial positioning assemblies and two axial positioning assemblies which are detachably connected, the radial positioning assemblies are annularly arranged at intervals, the two axial positioning assemblies are respectively arranged at two ends of the plurality of groups of radial positioning assemblies, the axial positioning assemblies can be detachably connected with the transformer, and the axial positioning assemblies and the radial positioning assemblies are matched to form a limiting space; the lightning arrester unit is arranged in the limiting space. This embodiment can promote the convenience of arrester unit installation.

Description

Transformer overvoltage release device

Technical Field

The utility model relates to the field of power transformers, in particular to an overvoltage release device for a transformer.

Background

With the gradual increase of the voltage grade of power transformers and other special transformers, the requirements on the stability and reliability of the voltage are higher and higher, so that the requirements on safe and reliable voltage regulation control of the transformers are more urgent. When the transformer is in test or actual operation, great impulse voltage can be generated among all voltage regulating gears due to random interference factors such as lightning and the like, when the impulse voltage exceeds the range which can be borne by the transformer, the discharge phenomenon among the gears is inevitably caused, and the insulation among the voltage regulating gears can be damaged, so that the transformer is failed or damaged. Therefore, it is important to release the overvoltage between the gears when discharging between the gears.

At present, in the related art, chinese patent with an authorization publication number of CN210182213U discloses a transformer built-in overvoltage and voltage regulation tapping protection device, which is used for protecting each voltage regulation tapping room in a transformer, and includes an insulating tube, the insulating tube includes an insulating tube wall and a tube cavity enclosed by the insulating tube wall, both ends of the insulating tube are provided with installation positioning portions, a plurality of lightning arrester units are arranged inside the insulating tube cavity and between the two installation positioning portions, and the lightning arrester units are used for being electrically connected with the tapping wires of the transformer. When the transformer is subjected to lightning impact, the voltage regulating tapping room is conducted through the lightning arrester unit, and an original insulation system of the protector cannot be damaged and destroyed, so that the purpose of protecting the transformer is achieved. When the device is installed, the lightning arrester unit is firstly installed in the tube cavity, then one copper plate, the spring, the other copper plate and the insulating cushion block are sequentially placed in the end part of the tube cavity, then one group of fasteners penetrate through the insulating tube wall and the insulating cushion block, and finally the other group of fasteners penetrate through the insulating tube wall to position the insulating cushion block.

To above-mentioned correlation technique, when the installation, need place insulating cushion inside the lumen, when using two sets of fasteners to fix insulating cushion and spacing, the fastener is difficult to adjust the cooperation well with insulating cushion and insulating tube well, and the installation convenience is poor.

SUMMERY OF THE UTILITY MODEL

The utility model provides an overvoltage releasing device of a transformer, which aims to solve the problem of poor installation convenience in the prior art.

The utility model provides an overvoltage release device for a transformer. The lightning arrester comprises a frame body and lightning arrester units, wherein the frame body is made of an insulating material, the frame body comprises a radial positioning assembly and an axial positioning assembly which are detachably connected, the radial positioning assembly is provided with a plurality of groups, the plurality of groups of radial positioning assemblies are annularly arranged at intervals, the number of the axial positioning assemblies is two, the axial positioning assemblies can be detachably connected with a transformer, the two axial positioning assemblies are respectively arranged at two ends of the plurality of groups of radial positioning assemblies, and the axial positioning assemblies and the radial positioning assemblies are matched to form a limiting space; the lightning arrester unit is arranged in the limiting space.

Furthermore, the axial positioning assembly comprises a plugging part and a mounting part, and the plugging part is detachably connected with the end parts of the plurality of groups of radial positioning assemblies; the installation department can be dismantled with the shutoff portion and be connected, and the installation department can be dismantled with the transformer and be connected.

Furthermore, a plurality of mounting holes are annularly formed in the blocking portion, the mounting holes and the radial positioning assemblies are arranged in a one-to-one correspondence mode, and the end portions of the radial positioning assemblies penetrate through the mounting holes.

Further, the plugging portion includes a voltage-sharing ball, and the voltage-sharing ball and the lightning arrester unit are coaxially arranged.

Further, the axial positioning component further comprises a buffer piece, and the buffer piece is arranged between the axial positioning component and the lightning arrester unit.

Further, the mounting groove has been seted up to one side that the axial positioning subassembly is close to the arrester unit, and the one end of bolster sets up in the mounting groove, the other end of bolster and the tip butt of arrester unit.

Furthermore, the radial positioning assembly comprises an insulating rod and a limiting piece, one end of the insulating rod penetrates through one of the axial positioning assemblies, and the other end of the insulating rod penetrates through the other axial positioning assembly; the locating parts are arranged at two ends of the insulating rod and fixedly connected with the insulating rod, and the locating parts are located on the outer sides of the two axial positioning assemblies.

Further, the outer circumference of the axial positioning assembly and/or the radial positioning assembly is covered with an insulating layer.

Furthermore, the arrester unit includes tapping piece and arrester valve plate, and the tapping piece is used for being connected with the tapping line electricity of transformer, and the arrester valve plate sets up with the tapping piece is coaxial side by side.

Further, the tapping piece comprises a copper plate and a wiring terminal, the copper plate is abutted to the valve plate of the lightning arrester, one end of the wiring terminal is fixedly connected with the copper plate, and the other end of the wiring terminal is used for being electrically connected with the tapping line of the transformer.

When the technical scheme of the utility model is applied, when the overvoltage release device of the transformer is installed, one end of the radial positioning component is firstly assembled with one group of axial positioning components, then the lightning arrester unit is placed in a space formed by the axial positioning components and the radial positioning components, then the other end of the radial component is assembled with the other group of axial positioning components, and finally, the axial positioning components of the overvoltage release device of the transformer are installed in the transformer. Compared with the prior art, the lightning arrester installing frame is simple in structure, utilizes the radial positioning assembly to limit the lightning arrester unit, can see the arrangement condition of the lightning arrester unit when being installed, can adjust the lightning arrester unit in real time, and greatly improves the convenience of installation.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

fig. 1 is a schematic structural diagram of a transformer overvoltage relief device provided by the utility model;

fig. 2 shows a schematic structural view of a plugging portion provided by the present invention;

fig. 3 shows a cross-sectional view of a closure provided by the present invention.

Wherein the figures include the following reference numerals:

10. a frame body; 11. a radial positioning assembly; 111. an insulating rod; 112. a limiting member; 12. an axial positioning assembly; 121. a plugging section; 1211. mounting holes; 1212. mounting grooves; 122. an installation part; 123. a buffer member; 20. a lightning arrester unit; 21. dividing and connecting pieces; 211. a copper plate; 212. a wiring terminal; 22. valve plate of lightning arrester.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, an embodiment of the present invention provides an overvoltage release device for a transformer, which includes a frame body 10 and an arrester unit 20, wherein the frame body 10 is made of an insulating material, the frame body 10 includes a radial positioning assembly 11 and an axial positioning assembly 12 that are detachably connected, the radial positioning assembly 11 is provided with a plurality of groups, in this embodiment, the radial assemblies are provided with three groups, the three groups of radial positioning assemblies 11 are annularly arranged at intervals, the axial positioning assemblies 12 are provided with two groups, the two axial positioning assemblies 12 are respectively arranged at two ends of the plurality of groups of radial positioning assemblies 11, the axial positioning assemblies 12 can be detachably connected with the transformer, and the axial positioning assemblies 12 and the radial positioning assemblies 11 cooperate to form a limiting space; the lightning arrester units 20 are arranged in a plurality along the length direction of the radial positioning component 11, specifically, the number of the lightning arrester units 20 is the same as the number of the tapping lines of the transformer, and the lightning arrester units 20 are used for electrically connecting with the tapping lines of the transformer.

By adopting the above technical scheme, when the worker installs the arrester unit 20, firstly, one end of the radial positioning component 11 needs to be assembled with one group of the axial positioning components 12, then, the arrester unit 20 is placed in a space formed by the radial positioning component 11 and the axial positioning component 12, and finally, the other axial positioning component 12 is assembled with the other end of the radial positioning component 11. After the assembly is completed, the frame body 10 is fixed in the transformer, and the lightning arrester unit 20 is electrically connected with the tapping line of the transformer. Axial positioning subassembly 12 and radial positioning subassembly 11 combined action form a spacing space, make things convenient for staff direct observation arrester unit 20 in the position of support body 10, and then conveniently carry on spacingly to arrester unit 20, can promote the convenience that the staff installed arrester unit 20, promote the efficiency of installation arrester unit 20.

Specifically, the axial positioning assembly 12 includes a blocking portion 121 and a mounting portion 122, and the blocking portion 121 is detachably connected to the ends of the plurality of sets of radial positioning assemblies 11; the mounting portion 122 is detachably connected to the blocking portion 121, and the mounting portion 122 is detachably connected to the transformer.

By adopting the above technical solution, before assembling the axial positioning component 12 and the radial positioning component 11, the blocking portion 121 and the mounting portion 122 need to be assembled first. The blocking portion 121 is detachably provided with the mounting portion 122, and the blocking portion 121 and the mounting portion 122 can be conveniently stored.

With reference to fig. 1 and fig. 2, a plurality of mounting holes 1211 are annularly disposed on the blocking portion 121, the mounting holes 1211 penetrate through the blocking portion 121 in the thickness direction, the mounting holes 1211 are disposed in one-to-one correspondence with the radial positioning assemblies 11, and the end portions of the radial positioning assemblies 11 penetrate through the mounting holes 1211. Radial positioning subassembly 11 and shutoff portion 121 adopt this kind of mode cooperation to set up, convenience when can promoting radial positioning subassembly 11 and shutoff portion 121 installation to can guarantee radial positioning subassembly 11 and shutoff portion 121's joint strength, improve device connection stability.

Specifically, the blocking portion 121 includes a voltage-sharing ball, which is disposed coaxially with the arrester unit 20, and may be made of aluminum or copper. The voltage equalizing balls can improve the electric field around the frame body 10, can better realize the distribution of the electric field, and ensure the operation reliability of the transformer.

With reference to fig. 1 and 3, further, the axial positioning assembly 12 further includes a buffer member 123, the buffer member 123 is a spring, the expansion and contraction direction of the spring is the same as the length direction of the radial positioning assembly 11, in this embodiment, a spring is provided, and the spring is located between one set of the axial positioning assembly 12 and the lightning arrester unit 20.

By adopting the technical scheme, when the lightning arrester units 20 are impacted, each lightning arrester unit 20 slides along the length direction of the radial positioning component 11, and at the moment, the springs can ensure that each lightning arrester unit 20 always keeps a mutually pressed state in the moving process, so that the stability and reliability of the electric contact pressure in the moving process of two adjacent lightning arrester units 20 are ensured; in addition, the arrangement of the spring can play a role in buffering the movement of the lightning arrester unit 20, and when the lightning arrester unit 20 is subjected to unexpected impact force, the spring can ensure that the external force of the lightning arrester unit 20 is stable and balanced elastic force, thereby ensuring the service life of the lightning arrester unit 20.

Further, a mounting groove 1212 is opened at a side of the axial positioning component 12 close to the arrester unit 20, one end of the spring is disposed in the mounting groove 1212, and the other end of the spring abuts against an end of the arrester unit 20. Install the spring in mounting groove 1212, mounting groove 1212 plays direction and spacing effect to the flexible of spring, can guarantee the stability of the flexible process of spring, guarantees the stability of elasticity transmission.

Wherein, the radial positioning component 11 can be a rod-shaped structure or a plate-shaped structure. As long as the lightning arrester unit 20 can be fixed. In this embodiment, the radial positioning assembly 11 includes an insulating rod 111 and a limiting member 112, one end of the insulating rod 111 penetrates through the mounting hole 1211 of one of the voltage-sharing balls, and the other end of the insulating rod 111 penetrates through the mounting hole 1211 of the other voltage-sharing ball. The limiting members 112 are disposed at two ends of the insulating rod 111 and fixedly connected to the insulating rod 111, and the limiting members 112 are located outside the two axial positioning assemblies 12. The arrangement of the insulating rod 111 and the limiting piece 112 is simple in structure and convenient to install. Specifically, the stopper 112 is a nut and is screwed to the insulating rod 111.

Further, the outer circumference of the axial positioning assembly 12 and/or the radial positioning assembly 11 is covered with an insulating layer. In the present embodiment, the insulating paper is wound around the circumference of the voltage equalizing balls and the insulating rods 111. The setting of insulating paper can effectively shorten the insulating distance of ball and insulator spindle 111 to ground of equalizing pressure, guarantees the reliability of transformer operation.

As shown in fig. 1, further, the arrester unit 20 includes a branch connector 21 and an arrester valve sheet 22, the branch connector 21 is used for electrically connecting with a tap line of the transformer, and the arrester valve sheet 22 is coaxially arranged side by side with the copper plate 211. Wherein the number of the arrester units 20 is selected according to the type of the transformer, and a plurality of the arrester units 20 can be arranged side by side when the arrester units 20 are installed. Moreover, the number of the arrester valve plates 22 can be selected according to actual conditions, and the arrester unit 20 can include a plurality of arrester valve plates 22. During the installation, at first, the ball of the voltage sharing that will inlay the spring is assembled with the one end of three insulator spindle 111, place a branch union piece 21 in this space, make branch union piece 21 and spring butt, then according to the demand, place a plurality of arrester valve block 22, and a plurality of arrester valve block 22 are coaxial to be set up side by side, later repeat above-mentioned step, place multiunit 20 of multiunit arrester side by side in spacing space, finally, with another voltage sharing ball with the other end assembly of three insulator spindle 111 together can.

Further, the branch connecting piece 21 comprises a copper plate 211 and a connecting terminal 212, the copper plate 211 is abutted to the lightning arrester valve plate 22, a welding hole is formed in the copper plate 211, the connecting terminal 212 is a copper flexible lead, one end of the copper flexible lead is embedded into the welding hole and welded with the copper plate 211, and the other end of the copper flexible lead is used for being electrically connected with a tap line of the transformer. The copper plate 211 is provided with a welding hole, so that the welding stability of the copper flexible conductor and the copper plate 211 can be improved.

Install a plurality of arrester units 20 in the transformer through the support body 10 that adopts this embodiment, compare with the conventional art, simple structure makes things convenient for the staff to observe the position of arrester unit 20, can promote the convenience of staff's installation arrester unit 20.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present embodiments. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A transformer overvoltage relief device, comprising:

the transformer support comprises a support body (10), wherein the support body (10) is made of an insulating material, the support body (10) comprises a radial positioning assembly (11) and an axial positioning assembly (12) which are detachably connected, the radial positioning assembly (11) is provided with a plurality of groups, the plurality of groups of radial positioning assemblies (11) are arranged at intervals in an annular mode, the number of the axial positioning assemblies (12) is two, the two axial positioning assemblies (12) are respectively arranged at two ends of the plurality of groups of radial positioning assemblies (11), the axial positioning assembly (12) can be detachably connected with a transformer, and the axial positioning assembly (12) and the radial positioning assembly (11) are matched to form a limiting space;

and the lightning arrester unit (20) is arranged in the limit space.

2. The transformer overvoltage relief device according to claim 1, wherein the axial positioning assembly (12) comprises:

the plugging part (121) is detachably connected with the end parts of the plurality of groups of radial positioning assemblies (11);

the installation part (122), installation part (122) with the connection can be dismantled in shutoff portion (121), installation part (122) can with the transformer can be dismantled and be connected.

3. The transformer overvoltage relief device according to claim 2, wherein a plurality of mounting holes (1211) are annularly arranged on the blocking portion (121), the mounting holes (1211) are arranged in one-to-one correspondence with the radial positioning assemblies (11), and ends of the radial positioning assemblies (11) are inserted into the mounting holes (1211).

4. The transformer overvoltage relief device according to claim 2, wherein the blocking portion (121) comprises:

a voltage-equalizing ball disposed coaxially with the arrester unit (20).

5. The transformer overvoltage relief device according to claim 1, wherein the axial positioning assembly (12) comprises:

a buffer (123), said buffer (123) being disposed between said axial positioning assembly (12) and said arrester unit (20).

6. The transformer overvoltage relief device according to claim 5, wherein a mounting groove (1212) is opened at a side of the axial positioning component (12) close to the surge arrester unit (20), one end of the buffer member (123) is disposed in the mounting groove (1212), and the other end of the buffer member (123) abuts against an end of the surge arrester unit (20).

7. The transformer overvoltage relief device according to claim 1, wherein the radial positioning assembly (11) comprises:

one end of the insulating rod (111) penetrates through one of the axial positioning assemblies (12), and the other end of the insulating rod (111) penetrates through the other axial positioning assembly (12);

the limiting pieces (112) are arranged at two ends of the insulating rod (111) and fixedly connected with the insulating rod (111), and the limiting pieces (112) are located on the outer sides of the two axial positioning assemblies (12).

8. The transformer overvoltage relief device according to claim 1, characterized in that the outer circumference of the axial positioning component (12) and/or the radial positioning component (11) is covered with an insulation layer.

9. The transformer overvoltage release arrangement according to claim 1, characterized in that the surge arrester unit (20) comprises:

the tapping piece (21) is used for being electrically connected with a tapping line of the transformer;

the lightning arrester valve plate (22), lightning arrester valve plate (22) with divide union piece (21) coaxial side by side setting.

10. The transformer overvoltage relief device according to claim 9, wherein the tap (21) comprises:

the copper plate (211), the said copper plate (211) is abutted against the said arrester valve plate (22);

and one end of the wiring terminal (212) is fixedly connected with the copper plate (211), and the other end of the wiring terminal (212) is electrically connected with a tapping line of the transformer.

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