CN221175880U - Angle adjustment self-locking mechanism and lightning arrester - Google Patents

Abstract

The utility model relates to the technical field of lightning protection of distribution transformers, and discloses an angle adjustment self-locking mechanism and a lightning arrester. The utility model comprises a rotating component, comprising a shell, a limiting piece arranged in the shell, wherein the limiting piece comprises a first clamping piece, a second clamping piece fixedly connected with the shell, and a rotating piece fixedly connected with the second clamping piece. According to the utility model, the self-locking mechanism is arranged for adjusting the angle, the size of the discharge gap can be adjusted in a rotating manner, other tools are not required to be carried by staff, the working mode is simplified, the working efficiency is increased, and the lightning arrester has higher protection capability than a single lightning arrester by connecting a plurality of lightning arresters in series.

Description

Angle adjustment self-locking mechanism and lightning arrester

Technical Field

The utility model relates to the technical field of lightning protection of distribution transformers, in particular to an angle adjustment self-locking mechanism and a lightning arrester.

Background

The surge of atmospheric voltage by lightning may cause an overvoltage on the supply line, which may put stress on the insulation system of the transformer. By installing a lightning arrester on the distribution transformer, it can absorb and disperse overvoltage, protecting the transformer insulation system from overvoltage damage.

The existing arrester has fixed discharge gap, the size of the discharge gap directly influences the breakdown resistance of the arrester, the arrester which cannot adjust the discharge gap cannot achieve the optimal breakdown resistance under different working conditions, the arrester can only play a role in lightning protection in fixed safety voltage, no adjustable range exists, the applicability is low, the improvement is needed, and in addition, the protection capability of a single arrester is relatively low. When a lightning impulse arrives, it can only withstand limited currents and energies.

Therefore, in order to solve the above problems, a lightning arrester with adjustable discharge gap is proposed.

Disclosure of Invention

This section is intended to outline some aspects of embodiments of the utility model and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description of the utility model and in the title of the utility model, which may not be used to limit the scope of the utility model.

The utility model is provided in view of the problems of low breakdown resistance and poor lightning protection effect of the lightning arrester which cannot adjust the discharge gap.

In order to solve the technical problems, the utility model provides the following technical scheme: the utility model provides an angle modulation self-locking mechanism, its includes the rotation subassembly, including the casing set up in the inside locating part of casing, the locating part includes first fastener, with casing fixed connection's second fastener, and with second fastener fixed connection's rotation piece.

As a preferable scheme of the angle adjustment self-locking mechanism of the utility model, wherein: the limiting piece further comprises an elastic piece, one end of the elastic piece is fixedly connected with the shell, and the other end of the elastic piece is fixedly connected with the second clamping piece.

As a preferable scheme of the angle adjustment self-locking mechanism of the utility model, wherein: one side of the first clamping piece, which is far away from the elastic piece, is provided with a plurality of first bulges which are uniformly distributed in a circumferential array.

As a preferable scheme of the angle adjustment self-locking mechanism of the utility model, wherein: the second clamping piece is provided with a plurality of second bulges on one side close to the first bulges, the second bulges are uniformly distributed in a circumferential array, and the shapes of the first bulges and the second bulges are matched.

As a preferable scheme of the angle adjustment self-locking mechanism of the utility model, wherein: the rotating piece comprises a rotating shaft, a rotating cover fixedly connected with one end of the rotating shaft and a connecting handle arranged on the rotating cover, and the length of the rotating shaft is larger than the thickness of the second clamping piece.

As a preferable scheme of the angle adjustment self-locking mechanism of the utility model, wherein: the second clamping piece is provided with a rotating hole, the rotating shaft penetrates through the rotating hole, and the other end of the rotating shaft is fixedly connected with the first clamping piece.

The utility model has the beneficial effects that: through setting up angle adjustment self-locking mechanism, can adjust the size of discharge gap through pivoted mode, in the work of adjusting discharge gap to traditional arrester, the staff needs to climb up, carries the inconvenient operation of adjusting tool with oneself, has increased staff's burden and work degree of difficulty, and the trouble that the staff carried the instrument can be saved to the utility model, simplifies its working method, increases work efficiency.

Another object of the present utility model is to provide a lightning arrester which aims to solve the problem that the protection capability of a single lightning arrester to a transformer is relatively low.

The angle adjusting self-locking mechanism comprises the angle adjusting self-locking mechanism, and further comprises a lightning protection assembly, wherein the lightning protection assembly comprises a conducting plate, a first lightning arrester and a second lightning arrester which are fixedly connected with the conducting plate, a mounting plate fixedly connected with the other end of the first lightning arrester, and a shell body and the mounting plate are fixedly connected.

As a preferred embodiment of the lightning arrester according to the utility model, wherein: the first lightning arresters and the second lightning arresters are provided with a plurality of first insulating umbrella sleeves and a plurality of second insulating umbrella sleeves, and the first insulating umbrella sleeves and the second insulating umbrella sleeves are distributed at intervals.

As a preferred embodiment of the lightning arrester according to the utility model, wherein: the lightning-protection assembly further comprises a first electrode and a second electrode, wherein the first electrode is arranged at the tail end of the connecting handle, and the second electrode is arranged at the tail end of the second lightning arrester.

As a preferable scheme of the angle adjustment self-locking mechanism of the utility model, wherein: a discharge gap is formed between the first electrode and the second electrode.

The utility model has the beneficial effects that: the device can provide a higher protection capability than a single arrester by connecting a plurality of arresters in series. When lightning impulse arrives, the lightning impulse can share current and energy together, so that damage of overvoltage to equipment and circuits is reduced, and the defects of weak breakdown resistance, non-ideal protection effect and the like of the lightning arrester with the discharge gap which cannot be adjusted are overcome.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:

FIG. 1 is a schematic view of an angle adjustment self-locking mechanism of the present utility model;

FIG. 2 is an exploded view of the components of the angle adjustment self-locking mechanism of the present utility model;

FIG. 3 is a schematic view of a second engaging member according to the present utility model;

FIG. 4 is a schematic view of a first engaging member according to the present utility model;

Fig. 5 is a schematic view of the arrester of the present utility model;

fig. 6 is a schematic diagram of example 4 of the present utility model.

Detailed Description

In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, but the present utility model may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present utility model is not limited to the specific embodiments disclosed below.

Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic can be included in at least one implementation of the utility model. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Example 1

Referring to fig. 1 to 4, in a first embodiment of the present utility model, an angle adjustment self-locking mechanism is provided, which includes a rotating assembly 100, including a housing 101, a limiting member 102 disposed inside the housing 101, the limiting member 102 including a first engaging member 102b, a second engaging member 102c fixedly connected to the housing 101, and a rotating member 103 fixedly connected to the second engaging member 102 c.

The limiting member 102 further includes an elastic member 102a having one end fixedly connected to the housing 101, and the other end of the elastic member 102a is fixedly connected to the second engaging member 102 c. The shell 101 is cylindrical, the elastic piece 102a is a spring, one end of the spring is connected to the bottom of the inner wall of the shell 101, and the other end of the spring is fixedly connected to the bottom end of the second clamping piece 102c, which is not protruded. The elastic member 102a is used for pushing the second engaging member 102c to keep the engaged state with the first engaging member 102b under the action of no external force.

The side of the first engaging member 102b away from the elastic member 102a is provided with a plurality of first protrusions 102b-1, and the first protrusions 102b-1 are uniformly distributed in a circumferential array.

The second clamping piece 102c is provided with a plurality of second bulges 102c-1 on one side, close to the first bulges 102b-1, of the second bulges 102c-1, the second bulges 102c-1 are uniformly distributed in a circumferential array, the shapes of the first bulges 102b-1 and the second bulges 102c-1 are matched, when the first clamping piece 102b and the second clamping piece 102c are tightly attached, the first bulges 102b-1 and the second bulges 102c-1 are in a dislocation state, the surfaces formed by the first bulges 102b-1 and the second bulges 102c-1 can be perfectly clamped, and the first clamping piece 102b and the second clamping piece 102c in the clamping state cannot rotate relatively.

The rotating member 103 includes a rotating shaft 103a, a rotating cover 103b fixedly coupled to one end of the rotating shaft 103a, and a connecting handle 103c provided on the rotating cover 103 b.

The second engaging member 102c is provided with a rotation hole 102c-2, the rotation shaft 103a penetrates through the rotation hole 102c-2, the other end of the rotation shaft 103a is fixedly connected with the first engaging member 102b, the length of the connecting handle 103c needs to be larger than the sum of the thickness of the second engaging member 102c and the height of the second protrusion 102c-1, and the purpose is to keep enough length to enable the rotation member 103 to keep a pressing space relative to the housing 101, so that the first engaging member 102b and the second engaging member 102c can be separated from the engaging state, and can rotate.

When the rotary cover 103b is pressed down, the elastic member 102a is shortened when the pressure is larger than the elastic force of the elastic member 102a, the second clamping member 102c is separated from the protrusion on the first clamping member 102b, the two are released from limit, at this time, the rotary cover 103b is rotated in the circumferential direction, so that the position of the first electrode 202a fixed at the tail end of the connecting handle 103c can be adjusted, the distance between the first electrode and the fixed second motor 203a is changed, and the discharge gap 206 can be adjusted as required.

When the rotating cover 103b is not pressed down any more, the elastic force of the elastic member 102a pushes the second clamping member 102c to reset, the first clamping member 102b and the second clamping member 102c are tightly attached, the protrusions on the surfaces of the first clamping member 102b and the second clamping member 102c are mutually clamped, and when no external force acts, the first clamping member 102b and the second clamping member 102c cannot rotate relatively, so that the angle can be fixed, and the position of the first electrode 202a can be kept unchanged.

Example 2

Referring to fig. 2, a second embodiment of the present utility model is shown, which is different from the first embodiment in that: the pointer is arranged on the rotating cover 103b, the scale is arranged on the surface of the shell 101, the scale can be printed on the shell 101 in actual production by measuring the relation between the rotating angle and the discharge gap 206, and a worker can intuitively adjust the discharge gap 206 by rotating as required, so that the operation is convenient and quick.

Preferably, in actual production, the first engaging member 102b and the second engaging member 102c may be arranged as densely as possible, so that a more precise angle adjustment can be achieved during the rotation process, and thus, the size of the air gap 206 can be adjusted more precisely; by increasing the height of the protrusions and the elastic force of the elastic member 102a, the stability of the angle adjustment self-locking mechanism can be increased.

Example 3

Referring to fig. 5, a third embodiment of the present utility model is shown, which is different from the first two embodiments: the lightning arrester comprises a lightning arrester assembly 200, a first lightning arrester 202 and a second lightning arrester 203 which are fixedly connected with the conductive plate 201, a mounting plate 204 fixedly connected with the other end of the first lightning arrester 202, and a shell 101 fixedly connected with the mounting plate 204.

The first lightning arrester 202 is a main lightning arrester, one end of which is fixed on the conducting plate 201 through bolts, the other end of which is fixed on the mounting plate 204 through bolts, and the mounting plate 204 is mounted on a transformer to be protected. One end of the second lightning arrester 203 is fixed to the conductive plate 201 by a bolt. The first arrester 202 and the second arrester 203 are connected in series.

The first lightning arrester 202 is provided with 5 first insulating umbrella sleeves 205a and 4 second insulating umbrella sleeves 205b, the second lightning arrester 203 is provided with 3 first insulating umbrella sleeves 205a and 2 second insulating umbrella sleeves 205b, the first insulating umbrella sleeves 205a and the second insulating umbrella sleeves 205b are distributed at intervals, and the diameter of the first insulating umbrella sleeves 205a is larger than that of the second insulating umbrella sleeves 205b.

The umbrella cover of the lightning arrester can provide electric insulation protection, prevents direct contact between the lightning arrester and the external environment, reduces breakdown risks caused by pollution, humidity, physical damage and other reasons, can block invasion of external dust, water vapor, chemical substances, sun drying and other harmful factors, and reduces the possibility of corrosion, aging and damage to the lightning arrester.

When the lightning arrester needs to be maintained or replaced, only the umbrella cover needs to be taken down, the lightning arrester is not required to be disassembled, and maintenance staff can conveniently overhaul and replace the lightning arrester.

The lightning protection assembly 200 further comprises a first electrode 202a and a second electrode 203a, wherein the first electrode 202a is arranged at the tail end of the connecting handle 103c, and the second electrode 203a is arranged at the tail end of the second lightning arrester 203.

A discharge gap 206 is formed between the first electrode 202a and the second electrode 203 a. Since the ball gap is a uniform electric field, the discharge voltage is stable, the dispersion is small, the protection performance is good, preferably, the shapes of the first electrode 202a and the second electrode 203a are hemispherical or hemispherical, and the cambered surfaces of the two electrodes are corresponding.

The operator can adjust the size of the discharge gap 206 by observing the scale to rotate the rotary cover 103b by a specified angle, and the adjustment of the discharge gap can change the discharge characteristic of the lightning arrester, so that the lightning arrester has better breakdown resistance under lightning impulse. This helps to extend the service life of the arrester and reduce the failure rate.

Example 4

Referring to fig. 6, a fourth embodiment of the present utility model is different from the first three embodiments in that an adjustable inductance element (L1), a closed air gap, an adjustable inductance element (L2), and the like can be combined to form a lightning protection device on the low voltage side of a distribution transformer.

In the practical application scene, when the low-voltage side of the distribution transformer is struck by lightning, lightning current invades the low-voltage winding, most of lightning induction overvoltage is added on the low-voltage winding through the neutral point grounding device, the voltage drop is increased to the high-voltage side by a transformation ratio through electromagnetic induction and is superposed on the phase voltage of the high-voltage winding, so that the high-voltage winding is subjected to overvoltage to cause breakdown accidents.

The distribution transformer is respectively provided with a lightning arrester at the high-voltage side and the low-voltage side, the lightning arrester grounding wire is connected with the transformer shell and the low-voltage side neutral point and then is grounded together, but the low-voltage circuit is damaged due to the fact that some heavy lightning areas are high in lightning induction overvoltage and large in lightning current amplitude, the low-voltage lightning arrester breaks down and is damaged, the low-voltage side of the distribution transformer is damaged, and the distribution transformer is damaged. Therefore, after the device provided by the utility model is improved to a certain extent, the device can be used as a low-voltage side lightning protection device, and a wider application range is generated.

Specifically, after the arrester and the airtight air gap are connected in parallel, the arrester and the airtight air gap are connected with the adjustable inductance element (L1) and the adjustable inductance element (L2) in series, all the elements are packaged in the insulation cabinet body (7), the grounding terminal (8) and the grounding grid of the distribution transformer (9) are electrically connected, the adjustable inductance element (L1) can adjust the inductance value according to the lightning current intensity of a protected area, the residual voltage of the arrester is not more than 1.3kV, the airtight air gap is composed of a graphite electrode (5) and an airtight space (6), the breakdown voltage of the airtight air gap is not broken down under the action of 1.5kV, the airtight air gap is reliably broken down under the action of 30kV voltage, the airtight air gap is sealed in the airtight space, the airtight space is vacuum or sulfur hexafluoride and other insulation materials with certain insulation capacity, the insulation cabinet body (7) is ensured to have certain insulation strength, the effect of 35kV alternating voltage can be born, the distribution transformer (9) is kept a certain distance from the insulation cabinet body (7), and the distance is better under the condition of allowing.

The list of electrical devices specifically employed is shown in the following table:

The adjustable inductance coil is adopted, the inductance value can be adjusted according to the intensity of the lightning current amplitude at the position of the distribution transformer (9), the lightning current waveform after passing through the inductance coil is gentle through the suppression effect of the inductive reactance on the lightning current, the waveform peak value is effectively reduced while the reliable action of the lightning arrester is better ensured, and the lightning protection effect of the low-voltage side of the distribution transformer is better ensured.

The airtight air gap is connected with the low-voltage side lightning arrester in parallel, the breakdown voltage of the air gap is 30kV, the withstand voltage is 1.5kV, the residual voltage of the lightning arrester is 1.3kV, when the lightning overvoltage is smaller than the action voltage of the lightning arrester, the lightning arrester and the air gap do not act, when the lightning overvoltage value reaches the action voltage of the lightning arrester, the lightning arrester acts, the air gap does not act, at the moment, the residual voltage (1.3 kV) of the air gap bearing the lightning arrester is not broken down, when the lightning overvoltage exceeds 30kV, at the moment, if the lightning arrester cannot act, the air gap breaks down and discharges, and the situation that the lightning arrester bears the too high lightning overvoltage and breaks down along the surface and is damaged is effectively prevented.

The insulation tolerance value of the whole cabinet body is 35kV, insulation breakdown cannot occur in the whole cabinet body structure under the condition of high lightning overvoltage, the whole cabinet body structure is fully closed, manufacturing and installation are convenient, and the distribution transformer low-voltage side circuit can be conveniently connected.

Through the mode, the low-voltage lightning arrester is ensured to reliably act, meanwhile, the low-voltage side lightning current amplitude is weakened, and the low-voltage side lightning protection effect of the distribution transformer is ensured

It should be noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present utility model may be modified or substituted without departing from the spirit and scope of the technical solution of the present utility model, which is intended to be covered in the scope of the claims of the present utility model.

Claims (10)

1. An angle modulation self-locking mechanism, its characterized in that: comprising the steps of (a) a step of,

The rotating assembly (100) comprises a shell (101), a limiting piece (102) arranged in the shell (101), a second clamping piece (102 c) fixedly connected with the shell (101) and a rotating piece (103) fixedly connected with the second clamping piece (102 c), wherein the limiting piece (102) comprises a first clamping piece (102 b).

2. The angle adjustment self-locking mechanism of claim 1, wherein: the limiting piece (102) further comprises an elastic piece (102 a) with one end fixedly connected with the shell (101), and the other end of the elastic piece (102 a) is fixedly connected with the second clamping piece (102 c).

3. The angle adjustment self-locking mechanism of claim 2, wherein: one side of the first clamping piece (102 b) far away from the elastic piece (102 a) is provided with a plurality of first bulges (102 b-1), and the first bulges (102 b-1) are uniformly distributed in a circumferential array.

4. The angle adjustment self-locking mechanism of claim 2 or 3, wherein: a plurality of second protrusions (102 c-1) are arranged on one side, close to the first protrusions (102 b-1), of the second clamping piece (102 c), the second protrusions (102 c-1) are uniformly distributed in a circumferential array, and the shapes of the first protrusions (102 b-1) and the second protrusions (102 c-1) are matched.

5. The angle adjustment self-locking mechanism of claim 4, wherein: the rotating member (103) comprises a rotating shaft (103 a), a rotating cover (103 b) fixedly connected with one end of the rotating shaft (103 a), and a connecting handle (103 c) arranged on the rotating cover (103 b), wherein the length of the rotating shaft (103 a) is larger than the thickness of the second clamping member (102 c).

6. The angle adjustment self-locking mechanism of claim 5, wherein: the second clamping piece (102 c) is provided with a rotating hole (102 c-2), the rotating shaft (103 a) penetrates through the rotating hole (102 c-2), and one end, far away from the rotating cover (103 b), of the rotating shaft (103 a) is fixedly connected with the first clamping piece (102 b).

7. A lightning arrester, characterized in that: comprising the angle adjustment self-locking mechanism according to any one of claims 1 to 6, further comprising,

The lightning protection assembly (200) comprises a conducting plate (201), a first lightning arrester (202) and a second lightning arrester (203) which are fixedly connected with the conducting plate (201), a mounting plate (204) fixedly connected with the other end of the first lightning arrester (202), and the shell (101) is fixedly connected with the mounting plate (204).

8. The arrester of claim 7, wherein: a plurality of first insulating umbrella sleeves (205 a) and a plurality of second insulating umbrella sleeves (205 b) are arranged on the first lightning arrester (202) and the second lightning arrester (203), and the first insulating umbrella sleeves (205 a) and the second insulating umbrella sleeves (205 b) are distributed at intervals.

9. The arrester of claim 8, wherein: the lightning protection assembly (200) further comprises a first electrode (202 a) and a second electrode (203 a), the first electrode (202 a) is arranged at the tail end of the connecting handle (103 c), and the second electrode (203 a) is arranged at the tail end of the second lightning arrester (203).

10. The arrester as claimed in claim 9, wherein: a discharge gap (206) is formed between the first electrode (202 a) and the second electrode (203 a).