Lightning arrester and on-line monitor connecting mechanism and transformer neutral point complete set protection device

Abstract

The invention provides a lightning arrester and on-line monitor connecting mechanism and a transformer neutral point complete set protection device, the lightning arrester and on-line monitor connecting mechanism comprises a connecting wire, an insulating base, a winding assembly and an elastic piece, the winding assembly comprises a bottom plate, a winding column and a first guide column, and the first guide column and the winding column are both fixedly connected to the bottom plate; a connecting hole is formed in the side, away from the wrapping post, of the bottom plate, the bottom plate is rotationally connected to the insulating base through the connecting hole, the elastic piece is arranged in the connecting hole and exerts torsional force on the bottom plate, the first end of the elastic piece is connected to the insulating base, the second end of the elastic piece is connected to the bottom plate, and the connecting wire is wound around the wrapping post. The first end of the connecting wire bypasses the first guide column and extends out of one side of the bottom plate, and the second end of the connecting wire extends out of the other side of the bottom plate. Torsional force is applied to the bottom plate through the elastic piece, so that the winding assembly tensions the connecting wire, and the situation that the connecting wire shakes along with wind and consequently the connecting position is loosened is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of electric power transmission equipment, and in particular to a lightning arrester and an online monitoring instrument connection mechanism and a transformer neutral point complete protection device. Background Art

[0002] The transformer neutral point gap grounding protection device is a complete set of equipment that integrates electrical equipment such as disconnectors, zinc oxide lightning arresters, discharge gaps and current transformers. It is used for the neutral point of 110KV and 220KV power transformers. It uses the discharge delay of gap discharge and the no discharge delay characteristics of metal oxide lightning arresters to protect the transformer neutral point insulation from damage by lightning overvoltage and power frequency transient overvoltage.

[0003] As the safe operation of power equipment becomes more and more important, the impact and losses caused by power outages on production and life are increasing. Therefore, there is an urgent need to conduct real-time or regular online monitoring of the operating status of power equipment to promptly reflect the quality of insulation so as to take preventive measures. The monitor is usually installed on the monitored equipment or accessories to automatically collect, process and send the status of the monitored equipment. The online monitor used in the existing neutral point complete set of equipment is connected to the lightning arrester through two copper strands and a copper busbar. When it is in high altitude areas, due to the influence of environmental factors such as wind and temperature, the connection between the copper strand and the copper busbar may become loose due to constant shaking, thereby making the information monitored by the online monitoring device unstable or unable to be monitored.

[0004] In summary, there is an urgent need for a lightning arrester and online monitor connection mechanism and a transformer neutral point protection device to solve or at least partially solve the problems existing in the prior art. Summary of the invention

[0005] The present invention aims to provide a connection mechanism between a lightning arrester and an online monitor, aiming to solve the problem that the existing connection method is prone to loosening and causes poor line contact. The specific technical solution is as follows:

[0006] A connection mechanism between a lightning arrester and an online monitor comprises a connecting wire, an insulating seat, a winding assembly and an elastic member, wherein the winding assembly comprises a base plate, a winding post and a first guide post, wherein the first guide post and the winding post are both fixedly connected to the same side of the base plate, a connecting hole is provided at one end of the base plate away from the winding post, the base plate is rotatably connected to the insulating seat through the connecting hole, the elastic member is arranged in the connecting hole, and the elastic member applies a torsional force to the base plate, the first end of the elastic member is connected to the insulating seat, the second end of the elastic member is connected to the base plate, the connecting wire is wound around the winding post, the first end of the connecting wire bypasses the first guide post and extends out from one side of the base plate, and the second end of the connecting wire extends out from the other side of the base plate.

[0007] A groove is arranged on the winding column, and the connecting wire is wound in the groove.

[0008] The groove is a spiral groove.

[0009] The winding assembly also includes a second guide post, which is arranged on the bottom plate and on a side of the winding post away from the first guide post.

[0010] The winding column, the first guide column and the second guide column are all circular columns.

[0011] The elastic member is a torsion spring.

[0012] The winding column and the first guide column are fixedly connected to the bottom plate by welding.

[0013] The outer surfaces of the winding column and the first guide column are coated with a zinc coating.

[0014] On the other hand, the present invention also provides a transformer neutral point protection device, the specific technical scheme is as follows:

[0015] A transformer neutral point protection device comprises an isolating switch, a lightning arrester, a current transformer and a frame, wherein the isolating switch, the lightning arrester and the current transformer are all mounted on the frame, a connecting bar is provided on the isolating switch, and the isolating switch is connected to the lightning arrester through the connecting bar, a connecting pipe and a grounding bar are provided on the current transformer, and the current transformer is connected to the frame through the grounding bar, a first end of the connecting pipe is connected to the current transformer, a second end of the connecting pipe extends upward and is connected to a discharge gap rod, a first end of the discharge gap rod is connected to the connecting pipe, and a second end of the discharge gap rod is connected to the connecting bar, and also comprises the above-mentioned lightning arrester and online monitor connection mechanism, and an online detector, wherein the online detector and the lightning arrester and online monitor connection mechanism are all mounted on the frame, an insulating seat is mounted on the frame, a first end of the connecting wire is connected to an end of the lightning arrester away from the isolating switch, and a second end of the connecting wire is connected to an input end of the online monitor.

[0016] The application of the technical solution of the present invention has the following beneficial effects:

[0017] When in use, the first end of the connecting wire is fixedly connected to the lightning arrester, and the second end of the connecting wire is sequentially bypassed by the first guide column and the winding column, and extends from the end of the winding column away from the first guide column and is fixedly connected to the input end of the online detector. After the wire is fixed, the elastic member is in a compressed state, and the elastic member applies a torsional force to the base plate, so that the base plate and the first guide column and the winding column rotate, so that the two ends of the connecting guide are always in a taut state. When encountering a strong wind environment, because the connecting guide is in a taut state, it will not shake due to the wind, thereby preventing the connecting wire from shaking with the wind and causing the connection to loosen.

[0018] In addition to the objects, features and advantages described above, the present invention has other objects, features and advantages. Figure 1-Figure 5 , the present invention is further described in detail. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0020] Figure 1 It is a schematic diagram of the overall structure of a connection mechanism between a lightning arrester and an online monitor of the present invention;

[0021] Figure 2 It is a schematic diagram of the internal structure of a connection mechanism between a lightning arrester and an online monitor of the present invention;

[0022] Figure 3 It is a partially enlarged schematic diagram of a connection mechanism between a lightning arrester and an online monitor of the present invention;

[0023] Figure 4 This is one of the overall structural schematic diagrams of a transformer neutral point complete set protection device of the present invention;

[0024] Figure 5 This is the second overall structural schematic diagram of a transformer neutral point complete set protection device of the present invention.

[0025] Among them, 1. disconnector; 11. connecting bar; 2. lightning arrester; 3. current transformer; 31. connecting pipe; 32. grounding bar; 33. discharge gap rod; 4. frame; 5. connecting mechanism between lightning arrester and online monitor; 51. connecting wire; 52. insulating seat; 53. winding assembly; 531. bottom plate; 5311. connecting hole; 532. winding column; 5321. groove; 533. first guide column; 534. second guide column; 54. elastic member; 6. online detector. DETAILED DESCRIPTION

[0026] In order to facilitate the understanding of the present invention, the present invention will be described more fully below, and preferred embodiments of the present invention are provided. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0028] Example:

[0029] See also Figure 1-Figure 5 The present embodiment provides a connection mechanism between a lightning arrester and an online monitoring instrument, comprising a connecting wire 51, an insulating seat 52, a winding assembly 53 and an elastic member 54. The winding assembly 53 comprises a base plate 531, a winding post 532 and a first guide post 533. The first guide post 533 and the winding post 532 are both fixedly connected on the same side of the base plate 531. A connecting hole 5311 is provided at one end of the base plate 531 away from the winding post 532. The base plate 531 is rotatably connected to the insulating seat 52 through the connecting hole 5311. The elastic member 54 is arranged in the connecting hole 5311, and the elastic member 54 applies a torsional force to the base plate 531. The first end of the elastic member 54 is connected to the insulating seat 52, and the second end of the elastic member 54 is connected to the base plate 531. The connecting wire 51 is wound around the winding post 532. The first end of the connecting wire 51 bypasses the first guide post 533 and extends out from one side of the base plate 531, and the second end of the connecting wire 51 extends out from the other side of the base plate 531.

[0030] Specifically, the first guide post 533 is arranged in parallel with the winding post 532 .

[0031] It can be understood that when in use, the first end of the connecting wire 51 is fixedly connected to the arrester 2, and the second end of the connecting wire 51 is passed around the first guide column 533 and the winding column 532 in turn, and extends from the end of the winding column 532 away from the first guide column 533 and is fixedly connected to the input end of the online detector 6. After the wire is fixed, the elastic member 54 is in a compressed state, and the elastic member 54 applies a torsional force to the bottom plate 531, so that the bottom plate 531 and the first guide column 533 and the winding column 532 rotate, so that the two ends of the connecting guide are always in a taut state. When encountering a strong wind environment, because the connecting guide is in a taut state, it will not shake due to the wind, thereby preventing the connecting wire 51 from shaking with the wind and causing the connection to become loose. It is also worth noting that when it is necessary to adjust the tension of the connecting wire 51, it is only necessary to adjust the compression of the elastic member 54. The greater the compression of the elastic member 54, the greater the elastic force provided, so that the connecting wire 51 is always in a tensioned state.

[0032] As a preferred embodiment, a groove 5321 is provided on the winding post 532 , and the connecting wire 51 is wound in the groove 5321 .

[0033] It can be understood that through the setting of the groove 5321, when the connecting wire 51 is wound on the winding pole 532, the connecting wire 51 is embedded in the groove 5321. Through the setting of the groove 5321, the connecting wire 51 is relatively fixed on the winding pole 532, preventing the connecting wire 51 from sliding relative to the winding pole 532 and causing the connecting wire 51 wound on the winding pole 532 to become loose.

[0034] As a preferred embodiment, the groove 5321 is a spiral groove.

[0035] It can be understood that by configuring the groove 5321 to be a spiral groove with a semicircular cross section, the connecting wire 51 is embedded in the spiral groove for fixation, so that the fixing of the connecting wire 51 is more stable.

[0036] As a preferred embodiment, the winding assembly 53 further includes a second guide post 534 . The second guide post 534 is disposed on the bottom plate 531 , and the second guide post 534 is disposed on a side of the winding post 532 away from the first guide post 533 .

[0037] The connecting wire 51 is guided by the first guide column 533 and the second guide column 534, and then the first guide column 533 and the second guide column 534 rotate simultaneously with the bottom plate 531, so that the connecting wire 51 is tensioned. Because the first guide column 533 and the second guide column 534 are far away from the rotation center of the bottom plate 531, when the bottom plate 531 rotates by the same angle, the connecting guide is driven to move a greater distance, thereby improving the effect of tensioning the connecting wire 51.

[0038] As a preferred embodiment, the winding post 532 , the first guide post 533 and the second guide post 534 are all circular posts.

[0039] It can be known that when the connecting wire 51 bypasses the first guide column 533 and the second guide column 534, the arc surface of the outer surface of the first guide column 533 and the second guide column 534 is used for transition, so that the connecting wire 51 can smoothly transition when bypassing the first guide column 533 and the second guide column 534, thereby preventing the connecting wire 51 from experiencing stress concentration (that is, if the first guide column 533 is square, when the connecting wire 51 bypasses the corner of the first guide column 533, the connecting wire 51 is easily bent at the corner, thereby causing stress concentration at the corner, and the position where stress concentration occurs is prone to cracking, which causes the connecting wire 51 to break).

[0040] As a preferred embodiment, the elastic member 54 is a torsion spring, and a torsion force is applied by the torsion spring. The first end of the torsion spring acts on the insulating seat 52, and the second end of the torsion spring acts on the bottom plate 531, so that the bottom plate 531 has a torsion tendency, so that the winding column 532 and the first guide column 533 on the bottom plate 531 tighten the connecting wire 51.

[0041] As a preferred embodiment, the winding post 532 and the first guide post 533 are fixedly connected to the bottom plate 531 by welding. It can be known that the first guide post 533 and the winding post 532 can be firmly fixed to the bottom plate 531 by welding, and this fixing method is not easy to get loose, etc., making the winding assembly 53 more firm and stable. Of course, in some other embodiments, the first guide post 533 and the winding post 532 can also be fixedly connected to the bottom plate 531 by riveting or threading.

[0042] As a preferred embodiment, the outer surfaces of the winding post 532 and the first guide post 533 are coated with a zinc coating.

[0043] It can be known that the winding post 532 and the first guide post 533 are made of steel material, and the winding post 532 and the first guide post 533 are coated with a galvanized layer on their outer surfaces, so as to protect the winding post 532 and the first guide post 533 from corrosion. Of course, corrosion protection can also be achieved by spraying paint. The bottom plate 531 and the second guide post 534 also adopt the same anti-corrosion method as the winding post 532 and the first guide post 533.

[0044] On the other hand, refer to Figure 1-Figure 5 , the present application also provides a complete set of transformer neutral point protection device, the specific technical scheme is as follows:

[0045] A transformer neutral point protection device, comprising an isolating switch 1, a lightning arrester 2, a current transformer 3 and a frame 4, wherein the isolating switch 1, the lightning arrester 2 and the current transformer 3 are all installed on the frame 4, the isolating switch 1 is provided with a connecting bar 11, the isolating switch 1 is connected to the lightning arrester 2 through the connecting bar 11, the current transformer 3 is provided with a connecting pipe 31 and a grounding bar 32, the current transformer 3 is connected to the frame 4 through the grounding bar 32, the first end of the connecting pipe 31 is connected to the current transformer 3, and the second end of the connecting pipe 31 extends upward and A discharge gap rod 33 is connected, a first end of the discharge gap rod 33 is connected to the connecting pipe 31, and a second end of the discharge gap rod 33 is connected to the connecting row 11. It also includes the above-mentioned arrester and online monitor connecting mechanism 5, and an online detector 6. The online detector 6 and the arrester and online monitor connecting mechanism 5 are both installed on the frame 4, and the insulating seat 52 is installed on the frame 4. The first end of the connecting wire 51 is connected to an end of the arrester 2 away from the disconnector 1, and the second end of the connecting wire 51 is connected to the input end of the online monitor.

[0046] It should be noted that the discharge gap rod 33 is actually broken along the middle, one end of which is connected to the connecting tube 31, and the other end is connected to the connecting row 11, and discharge balls are respectively arranged on both sides of the break, with a certain gap between the two discharge balls.

[0047] It can be known that by monitoring the arrester 2 through the online monitor, the monitor can monitor the discharge times and leakage current of the arrester 2 in real time. This makes it convenient for high-voltage line maintenance personnel to remotely monitor the normal operation of the high-voltage line. When a fault occurs, the fault point can be easily found and eliminated in time, thereby reducing the economic losses caused by power outages.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A lightning arrester and online monitoring instrument connection mechanism, characterized in that: It comprises a connecting wire (51), an insulating seat (52), a winding assembly (53) and an elastic member (54). The winding assembly (53) comprises a bottom plate (531), a winding post (532) and a first guide post (533), wherein the first guide post (533) and the winding post (532) are both fixedly connected to the same side of the bottom plate (531). A connection hole (5311) is provided at one end of the bottom plate (531) away from the winding pole (532), and the bottom plate (531) is rotatably connected to the insulating seat (52) through the connection hole (5311). The elastic member (54) is arranged in the connecting hole (5311), and the elastic member (54) applies a torsional force to the bottom plate (531), a first end of the elastic member (54) is connected to the insulating seat (52), and a second end of the elastic member (54) is connected to the bottom plate (531), The connecting wire (51) is wound around the winding post (532), the first end of the connecting wire (51) bypasses the first guide post (533) and extends out from one side of the base plate (531), and the second end of the connecting wire (51) extends out from the other side of the base plate (531).

2. The lightning arrester and online monitor connection mechanism according to claim 1, characterized in that: The winding pole (532) is provided with a groove (5321), and the connecting wire (51) is wound in the groove (5321).

3. The lightning arrester and online monitor connection mechanism according to claim 2, characterized in that: The groove (5321) is a spiral groove.

4. The lightning arrester and online monitor connection mechanism according to claim 1, characterized in that: The winding assembly (53) further comprises a second guide column (534), wherein the second guide column (534) is arranged on the bottom plate (531), and the second guide column (534) is arranged on a side of the winding column (532) away from the first guide column (533).

5. The lightning arrester and online monitoring instrument connection mechanism according to claim 4, characterized in that: The winding column (532), the first guide column (533) and the second guide column (534) are all circular columns.

6. The lightning arrester and online monitor connection mechanism according to claim 1, characterized in that: The elastic member (54) is a torsion spring.

7. The lightning arrester and online monitor connection mechanism according to claim 1, characterized in that: The winding post (532) and the first guide post (533) are fixedly connected to the bottom plate (531) by welding.

8. The lightning arrester and online monitor connection mechanism according to claim 1, characterized in that: The outer surfaces of the winding column (532) and the first guide column (533) are coated with a zinc coating.

9. A transformer neutral point protection device, characterized in that: The invention comprises an isolating switch (1), a lightning arrester (2), a current transformer (3) and a frame (4); the isolating switch (1), the lightning arrester (2) and the current transformer (3) are all mounted on the frame (4); the isolating switch (1) is provided with a connecting bar (11); the isolating switch (1) is connected to the lightning arrester (2) via the connecting bar (11); the current transformer (3) is provided with a connecting pipe (31) and a grounding bar (32); the current transformer (3) is connected to the frame (4) via the grounding bar (32); a first end of the connecting pipe (31) is connected to the current transformer (3); a second end of the connecting pipe (31) extends upward and is connected to a discharge gap rod (33); a first end of the discharge gap rod (33) is connected to the connecting pipe (31); a second end of the discharge gap rod (33) is connected to the connecting pipe (31); It also includes a lightning arrester and an online monitor connecting mechanism (5) as described in any one of claims 1 to 8, and an online detector (6), wherein the online detector (6) and the lightning arrester and an online monitor connecting mechanism (5) are both mounted on the frame (4), the insulating seat (52) is mounted on the frame (4), the first end of the connecting wire (51) is connected to an end of the lightning arrester (2) away from the isolating switch (1), and the second end of the connecting wire (51) is connected to the input end of the online monitor.

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