CN107589280A - A kind of testing wire clamp and complexes for relay protection small bus transition - Google Patents

Abstract

The invention discloses a kind of testing wire clamp and complexes for relay protection small bus transition, testing wire clamp for relay protection small bus transition includes metal sleeve and metallic rod, compression spring is provided between metallic rod and metal sleeve, the outer wall of metal sleeve is provided with socket, in metal sleeve and one end is inserted in the middle part of metallic rod and is provided with two engagement arms, the other end is provided with insulated handle, torque spring is provided between two engagement arms and root is connected by bearing pin with metallic rod, the outer wall of metal sleeve and socket is provided with insulation sleeve, and the end of insulation sleeve is resisted against on rear side of engagement arm；Complexes include at least one set of transition connection unit, and transition connection unit includes transition wire and two afore-mentioned test wire clamps.The present invention can realize the fast transition of WV, substantially shorten small bus transition the time required to, greatly facilitate site examining and repairing work, shorten the service work time, improve small bus transition efficiency, it is light carry, security risk it is low.

Description

A test clamp and a complete set of devices for relay protection small busbar transition

technical field

The invention relates to the field of relay protection of electric power systems, in particular to a test clamp and a complete set of devices for relay protection small busbar transition.

Background technique

The protection voltage of the substation (power plant) is transmitted to each protection device through the small bus bar on the top of the screen, and the small bus bars on the top of the screen are connected to each other. When one of the protective screen cabinets needs to be replaced, the Screen top voltage small busbar transition, Here it is the crux of the present invention's research. In the past, the traditional small voltage bus transition had the following difficulties: 1. It was difficult to work during the transition of the small voltage bus for protection. The attention must be highly concentrated during the work. If you are not careful, it is easy to cause voltage short circuit or grounding, which will cause all protection devices in the substation to fail. Loss of voltage, resulting in malfunction of relay protection, the consequences are extremely serious. 2. There are many work items and time-consuming for the transition of small voltage busbars. The transitional small busbar needs to lay secondary cables. The two sides of the cable are cut apart, and the number tube is aligned. Finally, both sides of the secondary cable need to be carefully confirmed by a special person before being connected to the small busbar on the top of the screen. The work involves a lot of work and takes a long time. 3. When the small busbar is restored, special personnel are still required to remove the secondary cables on both sides of the cable. The maintenance personnel have conducted calculations. To replace the protection of a 220kV line, it is necessary to remove and replace the protective screen cabinets on both sides, and the construction period is about 5 days. However, if the transition of the small voltage busbar is required, the construction period will take 6.5-7 days, which will increase the workload by about 40% ( It is not considered here that this protection screen cabinet is an extreme small bus way for all protection voltage sources).

Contents of the invention

The technical problem to be solved by the present invention: the relay protection small busbar transition has always been a complex and high-risk work in the secondary profession, and the transition generally requires skilled technicians to control it personally, which takes a long time. The previous small busbar transition Method --- The process is cumbersome, there are many steps, and the short circuit or grounding of the voltage circuit is prone to occur. Based on the various unfavorable factors of the above-mentioned small busbar transition, and in view of the above problems in the prior art, the present invention provides a method that can realize the rapid transition of the voltage small busbar, Significantly shorten the time required for the transition of small busbars, greatly facilitate the on-site maintenance work, shorten the maintenance work time, improve the transition efficiency of small busbars, and are portable and portable, with low safety risks for relay protection small busbar transition test clamps and complete set.

In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is:

On the one hand, the present invention provides a test clamp for relay protection small busbar transition, comprising a metal sleeve and a metal rod, a compression spring is arranged between the metal rod and the metal sleeve, and the metal sleeve has a There is a socket on the outer wall, the middle part of the metal rod is inserted into the metal sleeve, and one end is provided with two snapping arms, and the other end is provided with an insulating handle, and a torsion spring is provided between the two snapping arms, and the root passes through The pin shaft is connected with the metal rod, the metal sleeve and the outer wall of the socket are provided with an insulating sleeve, and the rear side of the engaging arm leans against the end of the insulating sleeve.

Preferably, the clamping surfaces of the two engaging arms are provided with mutually engaging clamping teeth.

Preferably, the compression spring is sheathed on the metal sleeve, and one end of the metal sleeve is in contact with the root of the socket, and the other end is in contact with the insulating handle of the metal rod.

Preferably, the front end of the insulating sleeve is provided with a telescopic accommodating chamber, and the rear end is provided with a spring accommodating chamber, the roots of the two engaging arms are arranged in the telescopic accommodating chamber, and the compression spring is arranged in the spring inside the chamber.

Preferably, a base is provided on the insulating handle, the insulating handle is connected to the metal rod through the base, and the end of the base is inserted into the spring accommodating cavity when the occlusal arm is opened.

Preferably, the end of the metal rod is provided with a threaded section, and the base is screwed to the threaded section at the end of the metal rod.

Preferably, the middle part of the insulating sleeve is provided with a first handle protruding radially.

Preferably, the end of the insulated handle is provided with a second handle extending radially.

Preferably, anti-slip lines are provided on the front side of the first handle, and anti-slip lines are provided on the rear end of the second handle.

On the other hand, the present invention also provides a complete set of equipment for relay protection small busbar transition, including at least one set of transition connection units, the transition connection unit includes a transition line and two aforementioned relay protection small busbar transition Both ends of the transition line are provided with plugs, and the plugs at both ends of the transition line are respectively connected to a socket of a test line clamp for relay protection small busbar transition.

The present invention is used for the test line clip of relay protection small busbar transition and has the following advantages:

1. The present invention can realize the rapid transition of small voltage busbars, significantly shorten the time required for the transition of small busbars, greatly facilitate the on-site maintenance work, shorten the maintenance work time, improve the transition efficiency of small busbars, and is portable and portable with low safety risks.

2. The present invention includes a metal sleeve and a metal rod. The outer wall of the metal sleeve is provided with a socket, which can be quickly connected to the transition line by using the socket, and has the advantage of high connection efficiency.

3. A compression spring is arranged between the metal rod and the metal sleeve of the present invention, the middle part of the metal rod is inserted in the metal sleeve and one end is provided with two occlusal arms, and the other end is provided with an insulating handle. There is a torsion spring and the root is connected to the metal rod through the pin shaft. Through the above structure, the long torque design of the transition clamp is realized, which can effectively ensure the bite force. Applicable, the elastic force of the compressed spring can ensure that the two occlusal arms are firmly occluded, and will not fall off during the actual transition on site, ensuring the safe completion of the maintenance transition work.

4. The metal casing of the test wire clamp and the outer wall of the socket of the present invention are provided with an insulating sleeve, which is designed for all insulation, and all metal parts are insulated and sealed to prevent short circuit or grounding of the voltage circuit and ensure the safety of maintenance.

The complete set of devices for relay protection small busbar transition of the present invention includes the test line clamp for relay protection small busbar transition of the present invention, including the transition line and two aforementioned test line clamps for relay protection small busbar transition, through The plugs at both ends of the transition line are respectively connected to a socket of a test wire clamp for the transition of the relay protection small busbar, which can realize the rapid transition of the voltage small busbar, and also has the test line for the relay protection small busbar transition of the present invention The aforementioned advantages of clips.

Description of drawings

Fig. 1 is a partial cross-sectional structural schematic diagram of an embodiment of the present invention.

Fig. 2 is a schematic cross-sectional structural view of the clamping state of the occlusal arm according to the embodiment of the present invention.

Fig. 3 is a schematic cross-sectional structural view of the occlusal arm in an open state according to an embodiment of the present invention.

Legend description: 1. Metal sleeve; 11. Socket; 2. Metal rod; 21. Occupying arm; 211. Clamping teeth; 22. Insulated handle; 221. Base; 222. Second handle; 23. Torque Spring; 3. Compression spring; 4. Insulation sleeve; 41. Telescopic accommodation chamber; 42. Spring accommodation chamber; 43. First handle.

detailed description

As shown in Fig. 1 and Fig. 2, the test clamp for relay protection small busbar transition in this embodiment includes a metal sleeve 1 and a metal rod 2, and a compression spring 3 is arranged between the metal rod 2 and the metal sleeve 1, The outer wall of the metal sleeve 1 is provided with a socket 11, the middle part of the metal rod 2 is inserted in the metal sleeve 1 and one end is provided with two snapping arms 21, and the other end is provided with an insulating handle 22, between the two snapping arms 21 A torsion spring 23 is provided and the root is connected to the metal rod 2 through a pin shaft. The outer wall of the metal sleeve 1 and the socket 11 is provided with an insulating sleeve 4 , and the rear side of the engaging arm 21 is against the end of the insulating sleeve 4 . The test line clamp of this embodiment can be connected with the transition line of the relay protection small bus transition through the socket 11. The clamping working principle of the test line clamp is as follows: in the initial state, due to the thrust of the compression spring 3, the metal rod 2 retracts toward the insulating sleeve 4, so the two engaging arms 21 are in a closed state against the torsion force of the torsion spring 23 due to the extrusion of the insulating sleeve 4, as shown in FIG. 2 . When needed to use, hold the insulating sleeve 4 and press the insulating handle 22 so that the metal rod 2 stretches out to the insulating sleeve 4, and the compression spring 3 is compressed so that the stroke becomes shorter. It is opened by the extrusion of the insulating sleeve 4, as shown in Figure 3; at this time, if the small bus bar of the screen top is placed between the openings of the two occlusal arms 21 and then the insulating handle 22 is released, the original state can be restored , and the two snapping arms 21 are in a closed state against the torsion force of the torsion spring 23 due to the extrusion of the insulating sleeve 4, thereby snapping and clamping the small bus bar of the panel top. The test line clamp of this embodiment is light and portable, the line clamps on both sides are insulated, and it is ready to use. It can conveniently and quickly carry out the transition of the small voltage bus, and can obviously shorten the time required for the transition of the small voltage bus, which is greatly convenient. On-site maintenance work shortens the maintenance period, improves the transition efficiency of small busbars, reduces the expenditure of human, material and financial resources, can significantly reduce the safety risk during the transition of small voltage busbars, and significantly improves the protective voltage short circuit or grounding caused by inconsistent operations of personnel on both sides of the cable during transition. Phenomenon, improve the level of safe and stable operation of the power system, has the advantages of light and portable, low safety risk.

In this embodiment, the clamping surfaces of the two occlusal arms 21 are provided with mutually occlusal clamping teeth 211, and the occlusal force between the two occlusal arms 21 can be improved by the mutually occlusal clamping teeth 211, and the test line can be improved. Clip contact reliability.

In this embodiment, the engaging arm 21 is made of an alloy material with good electrical conductivity and mechanical properties, so as to ensure the current carrying capacity of the secondary circuit during the transition without deformation.

In this embodiment, the compression spring 3 is sheathed on the metal sleeve 1, and one end of the metal sleeve 1 is in contact with the root of the socket 11, and the other end is in contact with the insulating handle 22 of the metal rod 2. Through the above structure, the When a large occlusal force is required, the compression spring 3 is easily twisted due to a large force, so the stability of the large occlusal force of the spring 3 can be ensured.

In this embodiment, the front end of the insulating sleeve 4 is provided with a telescopic accommodating chamber 41, and the rear end is provided with a spring accommodating chamber 42. The roots of the two engaging arms 21 are arranged in the telescopic accommodating chamber 41, and the compression spring 3 is arranged in the spring accommodating chamber 41. In the accommodating chamber 42, all the metal parts are insulated and sealed through the above structure, which can realize the full coverage wrapping of the compression spring 3 and the wrapping of the two occlusal arms 21, prevent the short circuit or grounding of the voltage circuit, and ensure the safety of maintenance.

In this embodiment, the insulating handle 22 is provided with a base 221, and the insulating handle 22 is connected to the metal rod 2 through the base 221. The structure can ensure that no matter whether the two engaging arms 21 are in the open or closed state, the internal structure of the spring accommodation chamber 42 can be blocked by the base 221, thereby effectively improving the insulation and sealing performance, and the safety is better.

In this embodiment, the end of the metal rod 2 is provided with a threaded section, and the base 221 is threadedly connected with the threaded section at the end of the metal rod 2 .

In this embodiment, the middle part of the insulating sleeve 4 is provided with a first handle 43 protruding radially. When the insulating handle 22 is pressed, the first handle 43 can play a fixed role, and the operation is more convenient and quick.

In this embodiment, the end of the insulating handle 22 is provided with a second handle 222 protruding radially. When the insulating handle 22 is pressed, the operating area is large, and it is more convenient and quick to use in conjunction with the first handle 43 .

In this embodiment, the front side of the first handle 43 is provided with anti-slip lines, and the rear end of the second handle 222 is provided with anti-slip lines. Through the above-mentioned structure, the first handle 43 and the second handle 222 can be realized. Anti-slip, more labor-saving and reliable operation.

The complete set of devices for relay protection small bus transition in this embodiment includes multiple sets of transition connection units, the transition connection unit includes a transition line and two test clamps for relay protection small bus transition in this embodiment, the transition line There are plugs at both ends of the transition line, and the plugs at both ends of the transition line are connected to a socket 11 of a test clamp for relay protection small bus transition. The complete set of devices for relay protection small busbar transition in this embodiment can complete the small busbar transition conveniently and quickly, and the test line can distinguish different voltages through different colors. In this embodiment, the test line has 10 cores, which meets the normal Transition requirements for all voltage core wires of 220kV or 110kV voltage level of double busbar connection (A630, B630, C630, L630, A640, B640, C640, L640, N600).

The above descriptions are only preferred implementations of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions under the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principles of the present invention should also be regarded as the protection scope of the present invention.

Claims (10)

1. A kind of 1. testing wire clamp for relay protection small bus transition, it is characterised in that：Including metal sleeve（1）And metallic rod （2）, the metallic rod（2）And metal sleeve（1）Between be provided with compression spring（3）, the metal sleeve（1）Outer wall be provided with Socket（11）, the metallic rod（2）Middle part be inserted in metal sleeve（1）In and one end be provided with two engagement arms（21）, it is another End is provided with insulated handle（22）, described two engagement arms（21）Between be provided with torque spring（23）And root passes through bearing pin and metal Bar（2）It is connected, the metal sleeve（1）And socket（11）Outer wall be provided with insulation sleeve（4）, and the engagement arm（21）After Side is resisted against insulation sleeve（4）End.
2. 2. the testing wire clamp according to claim 1 for relay protection small bus transition, it is characterised in that：It is described two Engagement arm（21）Clamping face be provided with the clamping tooth that is mutually twisted（211）.
3. 3. the testing wire clamp according to claim 1 for relay protection small bus transition, it is characterised in that：The compression Spring（3）It is sheathed on and metal sleeve（1）On, and the metal sleeve（1）One end is contradicted in socket（11）Root, the other end Contradict in metallic rod（2）Insulated handle（22）On.
4. 4. the testing wire clamp according to claim 1 for relay protection small bus transition, it is characterised in that：The insulation Set（4）Front end be provided with flexible accommodating cavity（41）, rear end be provided with spring retention chamber（42）, described two engagement arms（21）Root It is arranged in the flexible accommodating cavity（41）In, the compression spring（3）It is arranged in spring retention chamber（42）It is interior.
5. 5. the testing wire clamp according to claim 4 for relay protection small bus transition, it is characterised in that：The insulation Handle（22）It is provided with pedestal（221）, the insulated handle（22）Pass through pedestal（221）With metallic rod（2）It is connected, the occlusion Arm（21）Pedestal during opening（221）End be inserted in spring retention chamber（42）In.
6. 6. the testing wire clamp according to claim 5 for relay protection small bus transition, it is characterised in that：The metal Bar（2）End be provided with thread segment, the pedestal（221）And metallic rod（2）The thread segment threaded connection of end.
7. 7. the testing wire clamp according to claim 1 for relay protection small bus transition, it is characterised in that：The insulation Set（4）Middle part be provided with and extend radially the first Handheld Division of arrangement（43）.
8. 8. the testing wire clamp according to claim 7 for relay protection small bus transition, it is characterised in that：The insulation Handle（22）End be provided with and extend radially the second Handheld Division of arrangement（222）.
9. 9. the testing wire clamp according to claim 8 for relay protection small bus transition, it is characterised in that：Described first Handheld Division（43）Front side be provided with anti-slip veins, second Handheld Division（222）Rear end be provided with anti-slip veins.
10. A kind of 10. complexes for relay protection small bus transition, it is characterised in that：Connected including at least one set of transition single Member, the transition connection unit include being used for the small mother of relay protection described in any one in transition wire and two claims 1~9 The testing wire clamp of line transition, the both ends of the transition wire are equipped with plug, and the plug at the transition wire both ends respectively with a use In the socket of the testing wire clamp of relay protection small bus transition（11）It is connected.