阅读说明：本技术 一种计量装置电压回路专用线夹 (Special wire clamp for voltage loop of metering device ) 是由 陈启升 李帅 王劲 孔祥伦 赵正晖 刘江 陆高峰 李亮 席昌文 陈茉莉 于 2020-12-02 设计创作，主要内容包括：本发明公开了一种计量装置电压回路专用线夹,包括桩头连接部和与桩头连接部固定连接的二次出线连接部,桩头连接部可拆卸地固定连接在变压器桩头上,二次出线连接部可拆卸地连接低压侧导线和二次回路取电线。本发明能够实现二次回路低压线路与低压主干线路分开走线,互不干扰,同时不影响变压器低压桩头与低压出线连接方式,该新型连接线夹能够清晰的看到计量装置二次回路取电压线路走向,有效解决低压线路接触不良、搭接氧化的问题,通过改进连接方式,使计量装置电压二次回路采样可靠、精确。(The invention discloses a special wire clamp for a voltage loop of a metering device, which comprises a pile head connecting part and a secondary wire outlet connecting part fixedly connected with the pile head connecting part, wherein the pile head connecting part is detachably and fixedly connected to a pile head of a transformer, and the secondary wire outlet connecting part is detachably connected with a low-voltage side wire and a secondary loop wire taking wire. The novel connecting wire clamp can realize that a low-voltage circuit of a secondary circuit and a low-voltage trunk circuit are separately wired without mutual interference, and meanwhile, the connecting mode of a low-voltage pile head and a low-voltage outgoing line of a transformer is not influenced.)

1. The utility model provides a special fastener of metering device voltage circuit which characterized in that: the secondary wire outlet connecting device comprises a pile head connecting part (1) and a secondary wire outlet connecting part (2) fixedly connected with the pile head connecting part (1), wherein the pile head connecting part (1) is detachably and fixedly connected to a transformer pile head, and the secondary wire outlet connecting part (2) is detachably connected with a low-voltage side wire and a secondary circuit wire taking part.

2. The special wire clamp for the voltage loop of the metering device according to claim 1, wherein: the pile head connecting part (1) is provided with a through hole (3), the outer end of the through hole (3) close to the pile head connecting part (1) is provided with a communicating notch (4), and the communicating notch (4) is transversely penetrated with a locking screw (5).

3. The special wire clamp for the voltage loop of the metering device according to claim 1, wherein: the end part of the secondary outgoing line connecting part (2) is provided with a first blind hole (6) connected with the secondary outgoing line side and a second blind hole (7) connected with a secondary loop, a first set screw (8) radially penetrates through the upper side of the first blind hole (6), and a second set screw (9) radially penetrates through the front side of the second blind hole (7).

4. The special wire clamp for the voltage loop of the metering device according to claim 1, wherein: a threaded sleeve (10) is sleeved outside the first set screw (8), the threaded sleeve (10) is spirally connected to the secondary outgoing line connecting portion (2), a square head is arranged at the upper end of the threaded sleeve (10), and a rubber ring (11) is arranged between the square head and the lower end face of the large end of the first set screw (8).

5. The special wire clamp for the voltage loop of the metering device according to claim 1, wherein: the pile head connecting part (1) and the secondary outlet connecting part (2) are of an integral structure.

6. The special wire clamp for the voltage loop of the metering device according to claim 5, wherein: the pile head connecting part (1) and the secondary outlet connecting part (2) are of a right-angle bent Z-shaped structure.

7. The special wire clamp for the voltage loop of the metering device according to claim 1, wherein: the pile head connecting part (1) and the secondary outlet connecting part (2) are made of aluminum alloy materials.

8. The special wire clamp for the voltage loop of the metering device according to claim 2, wherein: two locking screws (5) are adopted.

Technical Field

The invention belongs to the technical field of metering device voltage loop power-taking equipment, and relates to a special wire clamp for a metering device voltage loop.

Background

In recent years, 10kV distribution lines are gradually enlarged along with city development, particularly, the rising trend of the number of 10kV distribution transformers in a four-wire city is obvious, so that the operation and maintenance quantity of the 10kV distribution transformers is gradually increased, the transformer maintenance becomes one of daily frequent and repeated work of a power grid enterprise, in the operation and maintenance process of the 10kV distribution transformers, because the secondary circuit of a distribution current transformer is connected and accessed to a low-voltage pile head, the grounding faults of the transformer are frequently caused by the problems of insecure wiring, oxidation and the like, and then the counting of a metering device is abnormal, and the defects are difficult to find and process by naked eyes.

Aiming at the frequent occurrence of faults caused by the wiring of a secondary voltage loop of a rack variable metering device, at present, a winding type lap joint mode is generally adopted in the wiring mode of the secondary loop of a distribution network line rack variable current transformer, namely, a secondary loop line of the current transformer is wound at a low-voltage pile head wire clamp at the low-voltage wire outlet side of a transformer, and the mode is convenient to connect and is not influenced by an external equipment structure, but has certain defects.

The winding type lap joint mode of the voltage loop of the metering device has the problems that:

1) the secondary circuit of the transformer metering device gets the line trend of the voltage disorderly;

2) a secondary circuit of the current transformer is crossed with a voltage connecting circuit and a low-voltage trunk circuit;

3) the copper and aluminum contact generates heat.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the utility model provides a special fastener of metering device voltage circuit to solve the problem that exists among the prior art.

The technical scheme adopted by the invention is as follows: the utility model provides a special fastener of metering device voltage circuit, includes pile head connecting portion and the secondary connecting portion of being qualified for the next round of competitions with pile head connecting portion fixed connection, pile head connecting portion detachably fixed connection is on transformer pile head, and secondary connecting portion detachably of being qualified for the next round of competitions connects low pressure side wire and secondary circuit and gets the electric wire.

Preferably, the pile head connecting part is provided with a through hole, the outer end of the through hole close to the pile head connecting part is provided with a communicating notch, and the communicating notch is transversely penetrated with a locking screw.

Preferably, the end part of the secondary outgoing line connecting part is provided with a first blind hole connected with the secondary outgoing line side and a second blind hole connected with the secondary loop, a first set screw penetrates through the upper side of the first blind hole in the radial direction, and a second set screw penetrates through the front side of the second blind hole in the radial direction.

Preferably, a threaded sleeve is sleeved outside the first set screw, the threaded sleeve is spirally connected to the secondary outgoing line connecting portion, a square head is arranged at the upper end of the threaded sleeve, and a rubber ring is arranged between the square head and the large-head lower end face of the first set screw.

Preferably, the pile head connecting part and the secondary outlet connecting part are of an integral structure.

Preferably, the pile head connecting part and the secondary outlet connecting part are of a right-angled and bent zigzag structure.

Preferably, the pile head connecting part and the secondary outlet connecting part are made of aluminum alloy materials.

Preferably, two locking screws are adopted.

The invention has the beneficial effects that: compared with the prior art, the novel connecting clamp can realize that a low-voltage circuit of a secondary circuit and a low-voltage trunk circuit are separately wired without mutual interference, and meanwhile, the connecting mode of a low-voltage pile head and a low-voltage outgoing line of a transformer is not influenced.

Drawings

FIG. 1 is a side view mounting arrangement of the present invention;

fig. 2 is a schematic view of the top mounting structure of the present invention.

Detailed Description

The invention is further described with reference to the accompanying drawings and specific embodiments.

Example 1: as shown in fig. 1-2, a special wire clamp for a voltage loop of a metering device comprises a pile head connecting part 1 and a secondary outlet connecting part 2 fixedly connected with the pile head connecting part 1, wherein the pile head connecting part 1 is detachably and fixedly connected to a transformer pile head, and the secondary outlet connecting part 2 is detachably connected with a low-voltage side wire and a secondary loop wire taking wire.

Preferably, above-mentioned pile head connecting portion 1 is provided with through-hole 3, and through-hole 3 is provided with intercommunication breach 4 by pile head connecting portion 1 outer end, and intercommunication breach 4 has transversely penetrated locking screw 5, and locking screw 5 adopts two, connects reliable and stable, can also set up the aluminum alloy cover of breach in through-hole 3, and extrusion deformation locks more reliably, and conductive connection is more stable, reduces the possibility of generating heat.

Preferably, the end of the secondary outgoing line connecting part 2 is provided with a first blind hole 6 connected with the secondary outgoing line side and a second blind hole 7 connected with a secondary loop, a first set screw 8 radially penetrates through the upper side of the first blind hole 6, a second set screw 9 radially penetrates through the front side of the second blind hole 7, and the mechanical connection and the conductive connection are reliable and stable.

Preferably, the threaded sleeve 10 is sleeved outside the first set screw 8, the threaded sleeve 10 is in threaded connection with the secondary wire outlet connecting portion 2, the square head is arranged at the upper end of the threaded sleeve 10, the rubber ring 11 is arranged between the square head and the lower end face of the first set screw 8 large head, the threaded sleeve is driven to abut against the secondary wire outlet end through rotating the set screw and rotates continuously, locking can be judged to be in place after the rubber ring is broken, and damage to a wire core and poor reliability of conductive connection due to overlarge locking force are avoided.

Preferably, the pile head connecting part 1 and the secondary outlet connecting part 2 are of an integral structure, so that the integral structure is better in rigidity and strength, and the thermal resistance caused by joints is reduced.

Preferably, the pile head connecting part 1 and the secondary outlet connecting part 2 are of a right-angled and bent zigzag structure, so that mutual interference caused when the pile heads are connected is avoided.

Preferably, the pile head connecting part 1 and the secondary outgoing line connecting part 2 are made of aluminum alloy materials, so that the conductive connection is reliable and stable, and the phenomenon of heating caused by contact of copper and aluminum is avoided.

The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present invention, and therefore, the scope of the present invention should be determined by the scope of the claims.