Transformer neutral point gap grounding protection device

Abstract

The utility model provides a transformer neutral point gap grounding protection device which comprises an installation base, an isolation switch is fixedly installed on the upper surface of the installation base, a lightning arrester is fixedly installed on the upper surface of the installation base, a first gap rod is fixedly installed at the top end of the lightning arrester, and a second gap rod is fixedly installed at the top end of the first gap rod. An insulating seat is movably arranged on the upper surface of the mounting base, a second gap rod is fixedly mounted at the top end of the insulating seat, a rectangular plate is fixedly mounted at the bottom end of the insulating seat, a supporting seat is fixedly mounted on the lower surface of the rectangular plate, and an adjusting assembly is arranged in a rectangular groove. The adjusting assembly comprises a connecting rod, a round rod, a limiting rod, a torsion spring, a push plate and a limiting groove, through the arrangement of the push plate, the limiting rod, the round rod, the limiting groove, the torsion spring and the supporting seat, the gap between the first gap rod and the second gap rod can be conveniently adjusted according to actual needs, and the safety during use is improved.

Description

Technical Field

[0001] The utility model relates to a grounding protection device, in particular to a transformer neutral point gap grounding protection device, belonging to the technical field of transformers. Background Art

[0002] Transformer is a static electrical equipment, mainly used to change the size of AC voltage without changing the frequency of AC current. It is widely used in power systems, transmission and distribution, and various electrical equipment to ensure the effective transmission and rational use of electric energy. 110kV and 220kV are the main voltage levels of the power supply network. Due to the high voltage, the neutral point is generally directly grounded. Due to the requirements of relay protection setting configuration and prevention of communication interference, in order to limit the single-phase short-circuit current, some transformers use the neutral point ungrounded mode. Under this operating mode, due to lightning strikes, single-phase grounding short-circuit faults, etc., neutral point overvoltage will be caused. Moreover, most transformers are graded insulation, so overvoltage poses a great threat to the insulation of the neutral point. In order to prevent accidents, it is necessary to set a protective device for it.

[0003] A Chinese patent publication (publication number: CN205389099U) discloses a transformer neutral point gap grounding protection device, including a neutral point switch, a zinc oxide lightning arrester, a current transformer, a discharge gap, an electric operating mechanism, a base, a neutral point lead terminal, an equipment pillar, a counter and a grounding plate; the neutral point switch is rotatably connected to the upper end of the voltage protector, and the voltage protector is fixed on the left side of the base; the zinc oxide lightning arrester is fixed at the middle tail position of the base; the current transformer is fixed on the right side of the base; the discharge gap is between the zinc oxide lightning arrester and the current transformer; the electric operating mechanism is fixed below the equipment pillar, and the top of the equipment pillar is fixedly connected to the base by bolts; the grounding plate is arranged on the lower end side of the equipment pillar; the counter is fixed on the upper end side of the equipment pillar; the utility model has the characteristics of full functions, small size, high reliability, easy installation and debugging, simple operation, and easy to promote and use;

[0004] Although the protection device is easy to install and debug, and simple to operate, it is not convenient to adjust the discharge gap according to the actual use environment and altitude. Its stability and safety during discharge are poor, and its safety factor is poor, which is easy to cause safety hazards. Therefore, a transformer neutral point gap grounding protection device is proposed. Utility Model Content

[0005] In view of this, the utility model provides a transformer neutral point gap grounding protection device to solve or alleviate the technical problems existing in the prior art and at least provide a beneficial choice.

[0006] The technical solution of the utility model is achieved as follows: a transformer neutral point gap grounding protection device comprises a mounting base, an isolating switch is fixedly mounted on the upper surface of the mounting base, a lightning arrester is fixedly mounted on the upper surface of the mounting base, a first gap rod is fixedly mounted on the top of the lightning arrester, an insulating seat is movably arranged on the upper surface of the mounting base, a second gap rod is fixedly mounted on the top of the insulating seat, a rectangular plate is fixedly mounted on the bottom end of the insulating seat, a support seat is fixedly mounted on the lower surface of the rectangular plate, a rectangular groove is opened on the upper surface of the mounting base, an adjustment component is arranged inside the rectangular groove, and the adjustment component comprises a connecting rod, a circular rod, a limit rod, a torsion spring, a push plate and a limit groove.

[0007] Further preferably, the second gap rod is located on the right side of the first gap rod, and the first gap rod and the second gap rod are arranged opposite to each other.

[0008] Further preferably, a connecting rod is fixedly installed between the left side and the right side of the inner wall of the rectangular groove, the support seat is movably sleeved on the outside of the connecting rod, a circular rod is fixedly installed on the right side of the support seat, a limiting rod is movably sleeved on the outside of the circular rod, a torsion spring is movably wound around the outside of the circular rod, and a push plate is fixedly installed on the upper surface of the limiting rod.

[0009] Further preferably, a guide hole is opened on the right side of the support seat, and the inner wall of the guide hole is in movably contact with the outer side of the connecting rod.

[0010] Further preferably, a circular hole is opened on the right side of the limiting rod, one end of the torsion spring is fixedly connected to the outer side of the circular rod, and the other end of the torsion spring is fixedly connected to the inner wall of the circular hole.

[0011] Further preferably, the lower surface of the rectangular plate is in movable contact with the upper surface of the mounting base.

[0012] Further preferably, a plurality of limiting grooves are formed on the upper surface of the mounting base, one side of the limiting grooves is connected to the rectangular groove, and the limiting rods cooperate with the limiting grooves.

[0013] The embodiment of the utility model has the following advantages due to the adoption of the above technical solution:

[0014] The utility model provides a push plate, a limit rod, a circular rod, a limit groove, a torsion spring and a support seat. By pulling the push plate upward, the push plate drives the limit rod to rotate upward on the outer side of the circular rod, and the limit rod is separated from a limit groove. When the limit rod rotates, the torsion spring is twisted, and the limit on the support seat can be released. At this time, the rectangular plate is pushed leftward or rightward, and the rectangular plate drives the support seat to move. At the same time, the rectangular plate also drives the insulating seat to move. The insulating seat drives the second gap rod to move. After the gap between the second gap rod and the first gap rod is adjusted to a suitable level, the pulling force on the push plate is released. At this time, the twisted torsion spring is reset, so that the limit rod cooperates with a limit groove to limit the support seat and limit the position of the second gap rod. It is convenient to adjust the gap between the first gap rod and the second gap rod according to actual needs, thereby improving safety during use.

[0015] The above summary is for the purpose of description only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the utility model will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is the main axonometric structural diagram of the utility model;

[0018] Figure 2 This is a main sectional isometric structural diagram of the utility model;

[0019] Figure 3 For the utility model Figure 2 The enlarged structure diagram of part A in the middle;

[0020] Figure 4 This is a main axonometric structural diagram of the rectangular plate, support seat and guide hole connector of the utility model.

[0021] Figure numerals: 1. mounting base; 2. isolating switch; 3. lightning arrester; 4. first gap rod; 5. second gap rod; 6. insulating seat; 7. rectangular plate; 8. rectangular groove; 9. adjustment assembly; 901. connecting rod; 902. circular rod; 903. limiting rod; 904. torsion spring; 905. push plate; 906. limiting groove; 10. supporting seat; 11. guide hole; 12. circular hole. DETAILED DESCRIPTION

[0022] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0023] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0024] like Figure 1-4 As shown, an embodiment of the utility model provides a transformer neutral point gap grounding protection device, including a mounting base 1, an isolating switch 2 is fixedly mounted on the upper surface of the mounting base 1, a lightning arrester 3 is fixedly mounted on the upper surface of the mounting base 1, a first gap rod 4 is fixedly mounted on the top of the lightning arrester 3, an insulating seat 6 is movably arranged on the upper surface of the mounting base 1, a second gap rod 5 is fixedly mounted on the top of the insulating seat 6, a rectangular plate 7 is fixedly mounted on the bottom end of the insulating seat 6, the lower surface of the rectangular plate 7 is movably in contact with the upper surface of the mounting base 1, a support seat 10 is fixedly mounted on the lower surface of the rectangular plate 7, a rectangular groove 8 is opened on the upper surface of the mounting base 1, an adjusting component 9 is arranged inside the rectangular groove 8, and the adjusting component 9 includes a connecting rod 901, a circular rod 902, a limiting rod 903, a torsion spring 904, a push plate 905 and a limiting groove 906.

[0025] In one embodiment, the second gap rod 5 is located on the right side of the first gap rod 4 , the first gap rod 4 and the second gap rod 5 are arranged opposite to each other, and a discharge gap is generated between the first gap rod 4 and the second gap rod 5 .

[0026] In one embodiment, a connecting rod 901 is fixedly installed between the left side and the right side of the inner wall of the rectangular groove 8, the support seat 10 is movably sleeved on the outer side of the connecting rod 901, and a circular rod 902 is fixedly installed on the right side of the support seat 10. A limiting rod 903 is movably sleeved on the outer side of the circular rod 902, and a torsion spring 904 is movably wound around the outer side of the circular rod 902. A push plate 905 is fixedly installed on the upper surface of the limiting rod 903, and a plurality of limiting grooves 906 are opened on the upper surface of the mounting base 1, and one side of the limiting groove 906 is connected to the rectangular groove 8, and the limiting rod 903 cooperates with the limiting groove 906, and the push plate 905 is pulled upward to drive the limiting rod 903 to move in the circular The outer side of the rod 902 rotates upward, and the rotating limit rod 903 gradually separates from a limit groove 906. The limit rod 903 rotates and causes the torsion spring 904 to twist, so that the limit on the support seat 10 can be released, and the support seat 10 can be moved, and the second gap rod 5 can be moved at the same time. After the second gap rod 5 is moved to a suitable position, the upward pulling force on the push plate 905 is released. At this time, the twisted torsion spring 904 is reset, so that the limit rod 903 cooperates with a limit groove 906 to limit the position of the support seat 10, thereby limiting the position of the second gap rod 5, making it easy to adjust the gap size between the first gap rod 4 and the second gap rod 5.

[0027] In one embodiment, a guide hole 11 is opened on the right side of the support seat 10, and the inner wall of the guide hole 11 is in movable contact with the outer side of the connecting rod 901. Under the mutual cooperation between the guide hole 11 and the connecting rod 901, the movement of the support seat 10 is guided.

[0028] In one embodiment, a circular hole 12 is opened on the right side of the limiting rod 903, one end of the torsion spring 904 is fixedly connected to the outer side of the circular rod 902, and the other end of the torsion spring 904 is fixedly connected to the inner wall of the circular hole 12, and the torsion spring 904 can be set to drive the limiting rod 903 to reset after rotation.

[0029] When the utility model is working: the whole device is installed at a specified position by installing the base 1. When the gap between the first gap rod 4 and the second gap rod 5 needs to be adjusted, the push plate 905 is pulled upward, so that the push plate 905 drives the limit rod 903 to rotate upward on the outside of the circular rod 902. At the same time, the limit rod 903 is separated from a limit groove 906. When the limit rod 903 rotates, the torsion spring 904 is twisted, and the limit on the support seat 10 can be released. At this time, the rectangular plate 7 is pushed left or right, and the rectangular plate 7 drives the support seat 10 in the rectangular groove. 8 moves internally, and at the same time, the rectangular plate 7 also drives the insulating seat 6 to move, and the insulating seat 6 drives the second gap rod 5 to move. After the gap between the second gap rod 5 and the first gap rod 4 is adjusted to a suitable level, the pulling force on the push plate 905 is released. At this time, the twisted torsion spring 904 is reset, so that the limiting rod 903 cooperates with a limiting groove 906 to limit the support seat 10, and at the same time limit the position of the second gap rod 5, so that the gap between the first gap rod 4 and the second gap rod 5 can be adjusted according to actual needs, thereby improving safety during use.

[0030] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A transformer neutral point gap grounding protection device, characterized in that: The invention comprises a mounting base (1), wherein an isolating switch (2) is fixedly mounted on the upper surface of the mounting base (1), a lightning arrester (3) is fixedly mounted on the upper surface of the mounting base (1), a first gap rod (4) is fixedly mounted on the top of the lightning arrester (3), an insulating seat (6) is movably arranged on the upper surface of the mounting base (1), a second gap rod (5) is fixedly mounted on the top of the insulating seat (6), a rectangular plate (7) is fixedly mounted on the bottom end of the insulating seat (6), a supporting seat (10) is fixedly mounted on the lower surface of the rectangular plate (7), a rectangular groove (8) is provided on the upper surface of the mounting base (1), an adjusting component (9) is arranged inside the rectangular groove (8), and the adjusting component (9) comprises a connecting rod (901), a circular rod (902), a limiting rod (903), a torsion spring (904), a push plate (905) and a limiting groove (906).

2. A transformer neutral point gap grounding protection device according to claim 1, characterized in that: The second gap rod (5) is located on the right side of the first gap rod (4), and the first gap rod (4) and the second gap rod (5) are arranged opposite to each other.

3. A transformer neutral point gap grounding protection device according to claim 1, characterized in that: A connecting rod (901) is fixedly installed between the left side and the right side of the inner wall of the rectangular groove (8); the support seat (10) is movably sleeved on the outer side of the connecting rod (901); a circular rod (902) is fixedly installed on the right side of the support seat (10); a limiting rod (903) is movably sleeved on the outer side of the circular rod (902); a torsion spring (904) is movably wound around the outer side of the circular rod (902); and a push plate (905) is fixedly installed on the upper surface of the limiting rod (903).

4. A transformer neutral point gap grounding protection device according to claim 1, characterized in that: A guide hole (11) is provided on the right side of the support seat (10), and the inner wall of the guide hole (11) is in movably contact with the outer side of the connecting rod (901).

5. A transformer neutral point gap grounding protection device according to claim 1, characterized in that: A circular hole (12) is provided on the right side of the limiting rod (903); one end of the torsion spring (904) is fixedly connected to the outer side of the circular rod (902); and the other end of the torsion spring (904) is fixedly connected to the inner wall of the circular hole (12).

6. A transformer neutral point gap grounding protection device according to claim 1, characterized in that: The lower surface of the rectangular plate (7) is in active contact with the upper surface of the mounting base (1).

7. A transformer neutral point gap grounding protection device according to claim 1, characterized in that: The upper surface of the mounting base (1) is provided with a plurality of limiting grooves (906), one side of the limiting groove (906) is connected to the rectangular groove (8), and the limiting rod (903) and the limiting groove (906) cooperate with each other.

Images