CN117153585A - Switching device - Google Patents

Abstract

The present application relates to a switching device. The equipment comprises a moving contact, a static side conductor, a moving side conductor and a contact assembly; one end of the moving side conductor, which faces the moving contact, is provided with a plurality of contact assemblies which are arranged around the circumference and are used for being communicated with the moving contact, and one end of the static side conductor, which faces the moving contact, is provided with a plurality of contact assemblies which are arranged around the circumference and are used for being communicated with the moving contact; the movable contact is configured to be movable in an arrangement direction of the stationary-side conductor and the movable-side conductor to communicate with each contact assembly provided to the movable-side conductor and each contact assembly provided to the stationary-side conductor to form a plurality of parallel channels. The current flowing into the moving side conductor is shunted in parallel through the corresponding contact finger assembly to flow into the moving contact, the current of the moving contact is shunted in parallel through the corresponding contact finger assembly to flow into the static side conductor, the conductive loop shunts the large current into small current through the two contact finger assemblies, so that the current flowing through each contact finger assembly of the static side conductor is reduced, the current of the conductive loop is increased, and the current passing capacity is improved.

Description

Switching device

Technical Field

The application relates to the technical field of high-voltage power transmission and distribution, in particular to switching equipment.

Background

With the rapid development of economy, industrial electric loads are also rapidly increased, and high-capacity high-voltage switches are gradually becoming the main force of power transmission and distribution equipment. The conductive loop of the high-voltage switch equipment mainly comprises a movable side conductor, a middle movable contact, a static side conductor and a conductive contact finger. The following three methods are commonly used for improving the current passing capability of the conductive loop:

(1) the size of the cylinder body and the conductor is increased, the through-flow performance and the insulation level can be effectively guaranteed by the scheme, but the overall arrangement volume and the part materials of the equipment are greatly increased, meanwhile, the mechanical transmission operation work is increased, the equipment cost is increased, the mechanical efficiency is reduced, the construction cost is increased, and the product is deviated from the technical requirements of large-city looped network economic construction improvement and the miniaturized design concept. (2) The structure size of the conductive loop is not changed, and the partial contact type of the conductive contact (spring contact, watchband contact and quincuncial contact) is changed, but the mode of changing the partial contact type of the contact has little effect in the application scene facing large current. (3) The structural size of the conductive loop conductor is not changed, and a high-conductivity material (such as copper) is adopted in a large area, however, the manufacturing cost is greatly increased by adopting a realization means of the high-conductivity material (such as copper) in a large area, the processing manufacturability is poor, the complete set period of parts is long, and the factory and field installation work is difficult.

In summary, the scheme has the problems of high construction cost and high installation and maintenance workload, especially in large and medium-sized urban power grid application, and cannot meet the comprehensive requirements of the market on the large-capacity and miniaturized economic technology of high-voltage switch equipment.

Disclosure of Invention

Based on this, it is necessary to provide a switching device which cannot meet the technical demands of market for high capacity and miniaturization of high voltage switchgear.

A switching device comprises a moving contact, a static side conductor, a moving side conductor and a contact assembly;

the movable contact is arranged between the static side conductor and the movable side conductor, and at least partially sleeved with at least one of the static side conductor and the movable side conductor;

the movable side conductor is provided with a plurality of contact assemblies which are arranged around the circumference at one end of the movable contact and are used for communicating with the movable contact, and a plurality of contact assemblies which are arranged around the circumference are arranged at one end of the static side conductor, which is arranged towards the movable contact and are used for communicating with the movable contact;

the movable contact is configured to be movable in an arrangement direction of the stationary conductor and the movable conductor to communicate with each of the contact assemblies provided to the movable conductor and each of the contact assemblies provided to the stationary conductor to form a plurality of parallel passages.

In one embodiment, the movable side conductor and the static side conductor are both annular, and the contact assembly comprises a main contact finger and an auxiliary contact finger;

the outer wall and the inner wall of the movable side conductor are respectively provided with the main contact finger and the auxiliary contact finger for abutting with the movable contact; the outer wall and the inner wall of the static side conductor are respectively provided with the main contact finger and the auxiliary contact finger which are used for being abutted with the moving contact.

In one embodiment, the contact assembly further includes an elastic support member, where the elastic support member is disposed on an outer side of the static side conductor or the moving side conductor, and the elastic support member is configured to apply a pushing force to the main contact finger, so that the main contact finger abuts against an outer wall of the moving contact.

In one embodiment, the contact assembly further includes an adjusting washer and a fastener, the fastener is disposed through the main contact finger, the elastic support member and the adjusting washer, and is connected with the static side conductor or the moving side conductor, the adjusting washer is located between the main contact finger and the elastic support member, and the adjusting washer is used for radially adjusting a distance between the elastic support member and the main contact finger so as to adjust a thrust applied by the elastic support member to the main contact finger.

In one embodiment, the main contact finger includes a conductive band and two main contact joints, one end of the conductive band is connected to the static side conductor or the moving side conductor, the other end of the conductive band is connected to the two main contact joints, and a first open slot is formed at one end of the conductive band, which is close to the main contact joints, so that the two main contact joints are in contact with the moving contact to generate independent deformation.

In one embodiment, the contact assembly further includes a positioning element, where the positioning element is disposed through the auxiliary contact finger and is connected to the static side conductor or the moving side conductor, and the position of the positioning element in the axial direction relative to the auxiliary contact finger is adjustable, so as to adjust the tightening force of the auxiliary contact finger on the moving contact.

In one embodiment, the moving contact is at least partially disposed through the moving-side conductor, the moving contact includes a first section and a second section that are connected to each other, the first section has a radial dimension greater than that of the second section, and the moving contact is configured such that when the second section is in communication with the contact assembly on the stationary-side conductor, the first section is in communication with the contact assembly on the moving-side conductor to form a conductive loop.

In one embodiment, on the moving-side conductor, the main contact finger and the auxiliary contact finger are both used for abutting against the outer wall of the moving contact, and the inner wall of the moving-side conductor is provided with a groove corresponding to each auxiliary contact finger, and the groove is used for providing an elastic deformation space for the corresponding auxiliary contact finger.

In one embodiment, the moving contact is ring-shaped, on the static side conductor, the main contact finger is used for abutting against the outer wall of the moving contact, the auxiliary contact finger is used for abutting against the inner wall of the moving contact, and the main contact finger and the auxiliary contact finger are aligned in the radial direction so that the main contact finger and the auxiliary contact finger are communicated with the moving contact synchronously.

In one embodiment, the switch device further includes a guide plate, the guide plate is connected to the static side conductor, and a gap is formed between at least a part of the guide plate and the static side conductor, so that the moving contact is inserted and arranged to limit the moving contact to move along the radial direction.

The beneficial effects are that:

the switch equipment provided by the embodiment of the application comprises a moving contact, a static side conductor, a moving side conductor and a contact assembly; the movable contact is arranged between the static side conductor and the movable side conductor and is at least partially sleeved with at least one of the static side conductor and the movable side conductor; one end of the moving side conductor, which faces the moving contact, is provided with a plurality of contact assemblies which are arranged around the circumference and are used for being communicated with the moving contact, and one end of the static side conductor, which faces the moving contact, is provided with a plurality of contact assemblies which are arranged around the circumference and are used for being communicated with the moving contact; the movable contact is configured to be movable in an arrangement direction of the stationary-side conductor and the movable-side conductor to communicate with each contact assembly provided to the movable-side conductor and each contact assembly provided to the stationary-side conductor to form a plurality of parallel channels. According to the application, the moving contact is communicated with each contact component arranged on the moving side conductor and each contact component arranged on the static side conductor, the moving side conductor and the static side conductor form a conductive loop, the current flowing into the moving side conductor is shunted in parallel through the corresponding contact finger component and flows into the moving contact, the current of the moving contact is shunted in parallel through the corresponding contact finger component and flows into the static side conductor, the conductive loop shunts the large current into the small current through the two contact finger components, so that the current flowing through each contact finger component of the static side conductor is reduced, the current of the conductive loop is increased, namely the size of the conductor is not changed, and the current of the conductive loop is increased through changing the local contact form, namely the current passing capability of the switch equipment is improved on the basis of ensuring the miniaturization of the switch equipment.

Drawings

Fig. 1 is a cross-sectional view of a switchgear according to an embodiment of the present application.

Fig. 2 is a left side view of a static side conductor in a switchgear according to an embodiment of the present application.

Fig. 3 is an enlarged view at a in fig. 1.

Fig. 4 is an enlarged view at B in fig. 1.

Fig. 5 is an enlarged view at C in fig. 1.

Fig. 6 is a top view of a conductive strip in a switchgear according to an embodiment of the present application.

Fig. 7 is a top view of an elastic support member in a switchgear according to an embodiment of the present application.

Fig. 8 is an enlarged view at D in fig. 2.

Reference numerals:

100-moving contact; 110-a first section; 120-a second section; 130-a through hole; 140-conical surface; 200-static side conductors; 210-mating holes; 220-boss; 300-moving side conductor; 310-groove; 320-mounting holes; 400-contact assembly; 410—primary finger; 411-conductive strips; 412-a main contact; 413-a first open slot; 414-a first primary finger; 415-a second primary finger; 420-auxiliary contact fingers; 421-a first auxiliary contact finger; 422-second auxiliary contact fingers; 423-connecting rods; 424-auxiliary joint; 430-elastic support; 431-supporting plate; 432-bending plate; 433-a second open slot; 440-adjusting washers; 450-fasteners; 460-positioning piece; 510-a guide plate; 511-avoiding an arc surface; 513-inclined plane; 520-fixing seat; 530-a fixed slot; 540-fixing piece.

Detailed Description

In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the application, whereby the application is not limited to the specific embodiments disclosed below.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Referring to fig. 1 and 2, fig. 1 is a cross-sectional view of a switchgear according to an embodiment of the present application. Fig. 2 is a left side view of a static side conductor in a switchgear according to an embodiment of the present application. The switch device provided by the embodiment of the application comprises a movable contact 100, a static side conductor 200, a movable side conductor 300 and a contact assembly 400; the movable contact 100 is disposed between the static side conductor 200 and the movable side conductor 300, and at least partially sleeved with at least one of the static side conductor 200 and the movable side conductor 300; one end of the moving side conductor 300 facing the moving contact 100 is provided with a plurality of contact assemblies 400 arranged around the circumference for communicating with the moving contact 100, and one end of the stationary side conductor 200 facing the moving contact 100 is provided with a plurality of contact assemblies 400 arranged around the circumference for communicating with the moving contact 100; the movable contact 100 is configured to be movable in an arrangement direction of the stationary-side conductor 200 and the movable-side conductor 300 to communicate with each contact assembly 400 provided to the movable-side conductor 300 and each contact assembly 400 provided to the stationary-side conductor 200 to form a plurality of parallel channels.

Specifically, the moving contact 100 is communicated with each contact assembly 400 arranged on the moving side conductor 300 and each contact assembly 400 arranged on the static side conductor 200, so that a conductive loop is formed from the moving side conductor 300 to the static side conductor 200, current flowing into the moving side conductor 300 is parallel-split through the corresponding contact assemblies 400 and flows into the moving contact 100, current of the moving contact 100 is parallel-split through the corresponding contact assemblies 400 and flows into the static side conductor 200, the conductive loop splits large current into small current through the two contact assemblies 400, the current flowing through each contact assembly 400 of the static side conductor 200 is reduced, the current of the conductive loop is increased, namely, the size of the conductor is not changed, the current of the conductive loop is increased through changing the local contact form, namely, on the basis of ensuring the miniaturization of the switch equipment, and the current passing capability of the switch equipment is improved.

In the present application, a driving system for driving the moving contact 100 to move in the device is omitted, and only the switch break and the connection portion of the main conductive function are described.

Referring to fig. 1 and 2, in one embodiment, the moving-side conductor 300 and the static-side conductor 200 are both annular, and the contact assembly 400 includes a main contact finger 410 and an auxiliary contact finger 420; the outer wall and the inner wall of the movable side conductor 300 are respectively provided with a main contact finger 410 and an auxiliary contact finger 420 for abutting against the movable contact 100; the outer wall and the inner wall of the static side conductor 200 are respectively provided with a main contact finger 410 and an auxiliary contact finger 420 for abutting against the moving contact 100.

Specifically, for convenience of description, the main contact finger 410 and the auxiliary contact finger 420 mounted on the movable side conductor 300 are defined as a first main contact finger 414 and a first auxiliary contact finger 420, respectively, and the main contact finger 410 and the auxiliary contact finger 420 mounted on the static side conductor 200 are defined as a second main contact finger 415 and a second auxiliary contact finger 420, respectively. The moving-side conductor 300, the static-side conductor 200 and the moving contact 100 are arranged in the axial direction, and the moving contact 100 can move in the axial direction under operation, can be communicated with the first main contact finger 414 and the first auxiliary contact finger 420, and can be communicated with the second main contact finger 415 and the second auxiliary contact finger 420, so that a conductive loop is formed. The contact assembly 400 includes the main contact finger 410 and the auxiliary contact finger 420, which further increases the number of parallel diversion channels, increases the through-current loop, and further improves the through-current capability of the switchgear.

The axes of the moving-side conductor 300, the stationary-side conductor 200, and the moving contact 100 overlap, and the axial direction and the radial direction in this embodiment are the axial direction and the radial direction of the moving-side conductor 300, the stationary-side conductor 200, and the moving contact 100.

Referring to fig. 3, 4 and 5, fig. 3 is an enlarged view of fig. 1 a. Fig. 4 is an enlarged view at B in fig. 1. Fig. 5 is an enlarged view at C in fig. 1. In one embodiment, the contact assembly 400 further includes an elastic support member 430, where the elastic support member 430 is disposed on the outer side of the static side conductor 200 or the moving side conductor 300, and the elastic support member 430 is used to apply a pushing force to the main contact finger 410 so that the main contact finger 410 abuts against the outer wall of the moving contact 100.

Specifically, the elastic support 430 is mounted on the outer wall of the static side conductor 200 or the moving side conductor 300 and abuts against the end of the main contact finger 410, so as to apply a pushing force to the corresponding main contact finger 410 towards the moving contact 100, so that the main contact finger 410 can stably abut against the outer wall of the moving contact 100, thereby ensuring good contact and improving the reliability of the switchgear.

Further, the elastic support 430 includes a support plate 431 and a bending plate 432 bent toward the moving contact 100 in an arc shape, and the bending plate 432 is disposed at the end of the support plate 431 for abutting against the main contact finger 410. The arc bending plate 432 is arranged, so that when the moving contact 100 moves relative to the main contact finger 410, when the main contact finger 410 receives a reverse thrust, the main contact finger 410 can rapidly transmit the thrust to the bending plate 432, so that the elastic supporting piece 430 is rapidly deformed, the thrust applied to the main contact finger 410 is reduced, and the friction force between the moving contact and the moving contact 100 is reduced. Preferably, the support plate 431 and the bending plate 432 are integrally formed.

In other embodiments, the resilient support 430 may also be a spring.

Referring to fig. 3, 4 and 5, in one embodiment, the contact assembly 400 further includes an adjusting washer 440 and a fastening piece 450, wherein the fastening piece 450 is inserted through the main contact finger 410, the elastic supporting piece 430 and the adjusting washer 440 and is connected with the static side conductor 200 or the moving side conductor 300, the adjusting washer 440 is located between the main contact finger 410 and the elastic supporting piece 430, and the adjusting washer 440 is used for adjusting the distance between the elastic supporting piece 430 and the main contact finger 410 in a radial direction so as to adjust the thrust force exerted by the elastic supporting piece 430 on the main contact finger 410.

Specifically, the fastening member 450 is radially inserted through the main contact finger 410, the elastic support member 430 and the adjusting washer 440, and is screwed with the static side conductor 200 or the moving side conductor 300, so as to stably fix the main contact finger 410 to the static side conductor 200 or the moving side conductor 300. The number of the adjusting washers 440 sleeved on the fastening member 450 is plural, and when the number of the adjusting washers 440 is changed, the distance between the main contact finger 410 and the elastic supporting member 430 can be changed in the radial direction, so that the pushing force applied by the elastic supporting member 430 to the main contact finger 410 can be changed to change the deformation of the main contact finger 410. Wherein, increasing the deformation of the main contact finger 410 can effectively reduce the contact resistance and improve the current passing capability of the conductive loop. Preferably, the fastener 450 is a screw

Referring to fig. 3, 4, 5, 6 and 7, fig. 6 is a top view of a conductive strip in a switchgear according to an embodiment of the present application. Fig. 7 is a top view of an elastic support member in a switchgear according to an embodiment of the present application. In one embodiment, the main contact finger 410 includes a conductive strip 411 and two main contact terminals 412, one end of the conductive strip 411 is connected to the static side conductor 200 or the moving side conductor 300, the other end is connected to the two main contact terminals 412, and one end of the conductive strip 411, which is close to the main contact terminals 412, is provided with a first open slot 413, so that the two main contact terminals 412 are in contact with the moving contact 100 to generate independent deformation.

Specifically, the conductive strap 411 is sleeved on the fastener 450 and abuts against the static side conductor 200 or the moving side conductor 300. Each conductive strip 411 has two main contacts 412 capable of being deformed independently, so that two groups of parallel channels are formed in each contact assembly 400, thereby further increasing the current capacity of the switchgear. The two independent main contacts 412 are arranged on the same conductive belt 411, so that the number of the fasteners 450 is reduced, the structure is simplified, and the installation complexity is avoided. Preferably, the first open slot 413 is a long open slot, so as to reduce mutual interference between the two main contacts 412 on the same conductive strip 411 when deformed.

Further, the support plate 431 is connected with two bending plates 432, and one end of the support plate 431, which is close to the bending plates 432, is provided with a second opening groove 433, and the two bending plates 432 are respectively abutted against the two main contacts 412, so that a stable pushing force can be applied to the two main contacts 412, and the two main contacts 412 on each conductive strip 411 are stably communicated with the moving contact 100. Preferably, the second open groove 433 is an elongated open groove.

Further, in the axial direction, the conductive strip 411 may be provided with a plurality of main contacts 412 to accommodate different amounts of current, thereby improving the adaptability of the switchgear. Preferably, the main contact 412 is riveted to the end of the conductive strip 411.

In addition, the conductive tape 411 is formed by pressing a plurality of copper sheets, and has a certain elasticity.

The side of the main contact 412 facing the moving contact 100 is an arc surface to be in point contact with the moving contact 100, so that the resistance and the friction force can be reduced, and the current capacity can be increased.

Referring to fig. 3, 4 and 5, in one embodiment, the contact assembly 400 further includes a positioning member 460, where the positioning member 460 is disposed through the auxiliary contact finger 420 and is connected to the static side conductor 200 or the moving side conductor 300, and the position of the positioning member 460 relative to the auxiliary contact finger 420 in the axial direction is adjustable to adjust the abutting force of the auxiliary contact finger 420 on the moving contact 100.

Specifically, the auxiliary contact finger 420 is provided with a plurality of positioning holes for the positioning member 460 to pass through in the axial direction, and the positioning member 460 can change the length of the free end of the auxiliary contact finger 420 by passing through the positioning holes at different positions, thereby changing the deformation degree when the auxiliary contact finger 420 abuts against the moving contact 100. Preferably, the positioning member 460 is a screw.

Further, the auxiliary contact finger 420 includes a connecting rod 423 and an auxiliary joint 424 protruding from the connecting rod 423, where the connecting rod 423 is abutted to the static side conductor 200 or the moving side conductor 300 and sleeved on the positioning member 460, the auxiliary joint 424 is abutted to the moving contact 100, and one side of the auxiliary joint 424 facing the moving contact 100 is an arc surface to be in point contact with the moving contact 100, so that the resistance and the friction force can be reduced, and the current capacity can be increased.

Referring to fig. 3, 4 and 5, in one embodiment, the moving contact 100 at least partially penetrates through the moving-side conductor 300, the moving contact 100 includes a first section 110 and a second section 120 that are connected to each other, the radial dimension of the first section 110 is larger than that of the second section 120, and the moving contact 100 is configured such that when the second section 120 is in communication with the contact assembly 400 on the static-side conductor 200, the first section 110 is in communication with the contact assembly 400 on the moving-side conductor 300 to form a conductive loop.

Specifically, the movable-side conductor 300 is configured with a mounting hole 320 therein, and the movable contact 100 is at least partially accommodated in the mounting hole 320. When the moving contact 100 is in the open state, a certain gap is provided between the moving contact 100 and the static side conductor 200, but the moving contact 100 can move freely in the mounting hole 320. When the second section 120 contacts with the contact assembly 400 on the static side conductor 200 during the moving process of the moving contact 100, the first section 110 contacts with the contact assembly 400 on the moving side conductor 300, that is, before the moving process of the moving contact 100 is finished, the contact assembly 400 on the moving side conductor 300 corresponds to the second section 120 with smaller radial dimension, so that friction force between the contact assembly 400 on the moving side conductor 300 and the moving contact 100 during the moving process of the moving contact 100 can be reduced.

Referring to fig. 1 and 4, in one embodiment, on the moving-side conductor 300, the main contact finger 410 and the auxiliary contact finger 420 are both used for abutting against the outer wall of the moving contact 100, and the inner wall of the moving-side conductor 300 is provided with a groove 310 corresponding to each auxiliary contact finger 420, and the groove 310 is used for providing an elastic deformation space for the auxiliary contact finger 420.

Specifically, the first main contact finger 414 and the first auxiliary contact finger 420 are both used for abutting against the outer wall of the moving contact 100, so that when the moving contact 100 moves in the mounting hole 320, no interference is caused to the movement of the moving contact 100. The first auxiliary contact finger 420 is disposed on the hole wall of the mounting hole 320, and in the process that the moving contact 100 moves relative to the first auxiliary contact finger 420, so that the first section 110 and the first auxiliary contact finger 420 contact, the first auxiliary contact finger 420 moves radially outwards under the thrust of the first section 110, and the groove 310 provides an elastic deformation space for the first auxiliary contact finger 420, so that the first auxiliary contact finger 420 can elastically deform and abut against the first section 110, thereby improving the stability of the communication between the first auxiliary contact and the first section 110.

Further, the first main contact finger 414 is located at a side close to the static side conductor 200 opposite to the first auxiliary contact finger 420, and during the moving contact 100 is approaching to the static side conductor 200, the first section 110 is first connected to the first main contact finger 414, and then when the second section 120 is connected to the contact assembly 400 on the static side conductor 200, the second auxiliary contact finger 420 is connected to the first section 110.

Referring to fig. 1, 3 and 5, in one embodiment, the moving contact 100 is ring-shaped, on the static side conductor 200, the main contact finger 410 is used to abut against the outer wall of the moving contact 100, the auxiliary contact finger 420 is used to abut against the inner wall of the moving contact 100, and the main contact finger 410 and the auxiliary contact finger 420 are aligned in the radial direction, so that the main contact finger 410 and the auxiliary contact finger 420 are synchronously communicated with the moving contact 100.

Specifically, the primary contact 412 of the second primary contact 415 and the secondary contact 424 of the second secondary contact 420 are aligned in a radial direction, so that the moving contact 100 can communicate with the second primary contact 415 and the second secondary contact 420 synchronously when approaching the static side conductor 200, thereby avoiding the relative movement between the second segment 120 and the primary contact 412 of the second primary contact 415 or the secondary contact 424 of the second secondary contact 420, and reducing friction.

After the movable contact 100 is communicated with the second main contact finger 415 and the second auxiliary contact finger 420, the movement is stopped, so that the second auxiliary contact finger 420 is arranged on the inner side of the static side conductor 200, interference is not caused, and the reliability of the switch device is ensured.

Further, the inner wall of the static side conductor 200 is convexly provided with a boss 220, and the second auxiliary contact finger 420 is mounted on the boss 220, so that a sufficient gap is formed between the second main contact finger 415 and the second auxiliary contact finger 420 for inserting the moving contact 100.

Further, the moving contact 100 is constructed with the through-hole 130, so that the mass of the moving contact 100 can be reduced, facilitating the movement of the moving contact 100. The moving side conductor 300, the moving contact 100 and the static side conductor 200 are all annular, so that the inner cavities of the moving side conductor 300, the moving contact 100 and the static side conductor 200 form an airflow channel, and the heat dissipation of the conductive loop is facilitated.

Referring to fig. 1, 2, 5 and 8, fig. 8 is an enlarged view of fig. 2D. In one embodiment, the switching device further includes a guide plate 510, the guide plate 510 is connected to the stationary side conductor 200, and a gap is formed between at least a portion of the guide plate 510 and the stationary side conductor 200 for inserting the moving contact 100 to limit the radial movement of the moving contact 100.

Specifically, the static side conductor 200 is configured with a mating hole 210, the guide plate 510 is connected to a wall of the mating hole 210, and a gap is formed between at least a partial region and the static side conductor 200, thereby forming a limiting space. When the moving contact 100 abuts against the second main contact finger 415 and the second auxiliary contact finger 420, one end of the moving contact 100, which is close to the static side conductor 200, is inserted into the limiting space and abuts against the static side conductor 200 and the guide plate 510, so that the moving contact 100 can be limited to move in the radial direction, and the moving contact 100 is in good contact with each second main contact finger 415 and each second auxiliary contact finger 420, and the contact pressure is equal. Preferably, the guide plate 510 is an insulating material.

Further, the guide plate 510 has a circular arc surface 511 on one side facing the moving contact 100, and the highest position of the circular arc surface 511 is used for abutting against the moving contact 100 to form point contact, so that the contact area is reduced, and the friction force is reduced. The two ends of the arc surface 511 are rounded, and the guide plate 510 is provided with an inclined surface 513, so that the impact force when the moving contact 100 contacts the guide plate 510 can be reduced.

Further, the end of the moving contact 100 facing the static side conductor 200 has a conical surface 140, so as to further reduce the impact force when the moving contact 100 contacts the guide plate 510.

Referring to fig. 1 and 8, in one embodiment, the switch device further includes a mounting base and a fixing member 540, the fixing base 520 is mounted on the inner side of the static side conductor 200, the fixing base 520 is provided with a fixing slot 530, and the fixing member 540 penetrates through the guide plate 510 and is connected with the fixing base 520, so that the guide plate 510 is mounted in the fixing slot 530 to limit the movement of the guide plate 510, so that the radial limit of the guide plate 510 on the moving contact 100 is more stable. Preferably, the number of the guide plates 510 is three, and the number and positions of the fixing seats 520 correspond to those of the guide plates 510. Preferably, the fixing member 540 is a screw.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims (10)

1. The switching equipment is characterized by comprising a moving contact, a static side conductor, a moving side conductor and a contact assembly;

the movable contact is arranged between the static side conductor and the movable side conductor, and at least partially sleeved with at least one of the static side conductor and the movable side conductor;

the movable side conductor is provided with a plurality of contact assemblies which are arranged around the circumference at one end of the movable contact and are used for communicating with the movable contact, and a plurality of contact assemblies which are arranged around the circumference are arranged at one end of the static side conductor, which is arranged towards the movable contact and are used for communicating with the movable contact;

the movable contact is configured to be movable in an arrangement direction of the stationary conductor and the movable conductor to communicate with each of the contact assemblies provided to the movable conductor and each of the contact assemblies provided to the stationary conductor to form a plurality of parallel passages.

2. The switchgear as claimed in claim 1, wherein the said moving and static side conductors are each annular, the said contact assembly comprising a main contact finger and an auxiliary contact finger;

the outer wall and the inner wall of the movable side conductor are respectively provided with the main contact finger and the auxiliary contact finger for abutting with the movable contact; the outer wall and the inner wall of the static side conductor are respectively provided with the main contact finger and the auxiliary contact finger which are used for being abutted with the moving contact.

3. The switching device of claim 2, wherein the contact assembly further comprises an elastic support member disposed outside the stationary side conductor or the moving side conductor, the elastic support member being configured to apply a pushing force to the main contact finger so as to make the main contact finger abut against an outer wall of the moving contact.

4. A switchgear device according to claim 3, characterized in that the contact assembly further comprises an adjustment washer and a fastener, the fastener penetrating the main contact finger, the elastic support and the adjustment washer and being connected to the static side conductor or the moving side conductor, the adjustment washer being located between the main contact finger and the elastic support, the adjustment washer being adapted to adjust the distance between the elastic support and the main contact finger in a radial direction for adjusting the thrust exerted by the elastic support on the main contact finger.

5. The switchgear as claimed in any of claims 2-4, wherein the said main contact finger comprises a conductive strip and two main contacts, one end of the said conductive strip being connected to the said static side conductor or the said moving side conductor, the other end being connected to the two said main contacts, the said conductive strip being provided with a first open slot at one end near the said main contacts for allowing independent deformation of the contact of the two said main contacts with the said moving contacts.

6. The switching device according to any one of claims 2 to 4, wherein the contact assembly further comprises a positioning member, the positioning member is configured to be inserted into the auxiliary contact finger and connected to the static side conductor or the moving side conductor, and a position of the positioning member in an axial direction relative to the auxiliary contact finger is adjustable so as to adjust a tightening force of the auxiliary contact finger to the moving contact.

7. The switching device of any one of claims 2-4, wherein the moving contact is at least partially threaded through the moving-side conductor, the moving contact comprising first and second sections connected to each other, the first section having a larger radial dimension than the second section, the moving contact being configured to communicate with the contact assembly on the moving-side conductor to form a conductive loop when the second section is in communication with the contact assembly on the stationary-side conductor.

8. The switching device according to claim 7, wherein on the moving-side conductor, the main contact finger and the auxiliary contact finger are each adapted to abut against an outer wall of the moving contact, and a groove corresponding to each of the auxiliary contact fingers is provided on an inner wall of the moving-side conductor, the groove being adapted to provide a space for elastic deformation of the corresponding auxiliary contact finger.

9. The switching device according to any one of claims 2-4, wherein the moving contact is ring-shaped, the main contact finger is for abutting against an outer wall of the moving contact, the auxiliary contact finger is for abutting against an inner wall of the moving contact, and the main contact finger and the auxiliary contact finger are aligned in a radial direction so that the main contact finger and the auxiliary contact finger communicate with the moving contact simultaneously.

10. The switching device of claim 9, further comprising a guide plate connected to the stationary conductor, the guide plate having a gap between at least a partial region thereof and the stationary conductor for inserting the moving contact to limit the radial movement of the moving contact.