CN210120065U - On-load tap-changer capacity-regulating contact device - Google Patents

Abstract

The utility model provides a have on-load tap-changer to transfer and hold contact device, include: the movable contact seats are arranged on the first support, the first support is driven by external force to drive the movable contact seats to reciprocate linearly, and two main contact assemblies are respectively arranged on two sides of the movable contact seats along the moving direction of the movable contact seats; and the plurality of static contact assemblies are arranged on the second bracket and are provided with static contacts connected or disconnected with the main contact assembly. Because main contact subassembly adopts the mode that upper and lower relatively independent distributes, under the limited condition of on-load tap-changer overall dimension, make creepage distance between the two can set up great like this, be difficult for producing electric arc, the security performance is higher, life is longer.

Description

On-load tap-changer capacity-regulating contact device

Technical Field

The utility model relates to an on-load tap-changer technical field, concretely relates to on-load tap-changer holds contact device by transferring.

Background

In the electric power supply system, often meet some seasonal or periodic loads, when the power consumption peak, need have the transformer of large capacity just can satisfy the power consumption demand, and when the power consumption peak, there is no-load loss in the transformer of great capacity, has wasted a large amount of electric energy, and on-load tap-changer's accent holds the device and can change the connected mode of transformer winding to realize the switching of high appearance and low appearance, reduced the loss, practiced thrift the electric energy.

Traditional on-load tap-changer capacitance-regulating moving contact components are arranged at intervals along the length direction of the base, and due to the fact that the external dimension of the on-load tap-changer is limited, the creepage distance of an external lead which is electrically connected with two adjacent moving contact components is too small, electric arcs are easily generated when gears are switched, safety performance is low, and the service life of products is shortened.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the on-load tap-changer volume-regulating moving contact subassembly creepage distance undersize among the prior art, produces electric arc easily, and the security performance is low, and has shortened the life's of product defect to provide one kind and be difficult for producing electric arc, long service life, the security performance is high on-load tap-changer volume-regulating contact means.

Therefore, the utility model provides an it holds contact device to have on-load tap-changer to transfer, include:

the movable contact seats are arranged on a first bracket, the first bracket is driven by external force to drive the movable contact seats to reciprocate linearly, and two main contact assemblies are respectively arranged on two sides of each movable contact seat along the moving direction of the movable contact seat;

and the plurality of static contact assemblies are arranged on the second bracket and are provided with static contacts connected or disconnected with the main contact assembly.

As a preferred aspect, the main contact assembly includes:

the conductive plate is integrally formed on the movable contact seat and is provided with a first through hole;

the two moving contact clamping pieces are respectively arranged on the upper side and the lower side of the current conducting plate and are provided with second through holes which are arranged opposite to the first through holes, and the parts of the two moving contact clamping pieces, which extend out of the current conducting plate, are opposite to each other to form a clamping space suitable for clamping a static contact;

and the pin assembly fixedly connects the two moving contact clamping pieces with the conductive plate after penetrating through the first through hole and the second through hole.

As a preferred scheme, the movable contact seat is provided with two auxiliary contact assemblies and two main contact assemblies in a staggered mode along one side of the moving direction of the movable contact seat, transition resistors are arranged on one side, away from the fixed contact assembly, of the movable contact seat, and the transition resistors are connected with the auxiliary contact assemblies and the main contact assemblies through wires respectively.

As a preferred scheme, the fixed contact assembly includes two first fixed contacts and a second fixed contact which are sequentially arranged along the length direction of the second bracket, the first fixed contact has two first fixed contact plates which are arranged in parallel, and the second fixed contact is a U-shaped fixed contact plate.

As a preferable scheme, support shafts in guide transition fit with the main contact assembly are further arranged between two adjacent first fixed contacts and between the first fixed contact and the second fixed contact.

The utility model discloses technical scheme has following advantage:

1. the utility model provides an it holds contact device to have on-load tap-changer to transfer, include: the movable contact seats are arranged on the first support, the first support is driven by external force to drive the movable contact seats to reciprocate linearly, and two main contact assemblies are respectively arranged on two sides of the movable contact seats along the moving direction of the movable contact seats; and the plurality of static contact assemblies are arranged on the second bracket and are provided with static contacts connected or disconnected with the main contact assembly. Because main contact subassembly adopts the mode that upper and lower relatively independent distributes, make the creepage distance between the two great that can set up like this, be difficult for producing electric arc, the security performance is higher, and life is longer.

2. The utility model provides a have on-load tap-changer to transfer and hold contact device, main contact subassembly includes: the conductive plate is integrally formed on the movable contact seat and is provided with a first through hole; the two moving contact clamping pieces are respectively arranged on the upper side and the lower side of the current conducting plate and are provided with second through holes which are arranged opposite to the first through holes, and the parts of the two moving contact clamping pieces, which extend out of the current conducting plate, are opposite to each other to form a clamping space suitable for clamping a static contact; and the pin assembly fixedly connects the two moving contact clamping pieces with the current conducting plate after penetrating through the first through hole and the second through hole. Through setting up the current conducting plate, increased the area of contact between two moving contact folder, reduced the contact resistance of each contact subassembly, be favorable to reducing calorific capacity.

3. The utility model provides an on-load tap-changer transfers appearance contact device, between two adjacent first static contacts, still be provided with between first static contact and the second static contact with auxiliary contact subassembly and main contact subassembly direction transition fit's back shaft, the back shaft can make main contact subassembly transition more steady, swift when switching, reduces the striking between movable contact subassembly and the static contact subassembly, long service life, and the noise is little when switching the process.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a perspective view of the capacity-regulating contact device of the on-load tap-changer of the present invention;

fig. 2 is a perspective view of the on-load tap-changer capacitance-adjusting contact device in a high-capacitance gear position;

fig. 3 is a perspective view of the on-load tap-changer capacitance-adjusting contact device in a low-capacitance gear position;

FIG. 4 is a perspective view of a movable contact block;

FIG. 5 is a cross-sectional view of FIG. 4;

FIG. 6 is a perspective view of the stationary contact assembly mounted to a second bracket;

FIG. 7 is a top view of FIG. 6;

FIG. 8 is a cross-sectional view taken along line A-A of FIG. 7;

fig. 9 is a cross-sectional view taken along the line B-B in fig. 7.

Description of reference numerals: 1. a first bracket; 2. a second bracket; 3. a movable contact seat; 4. a primary contact assembly; 41. a conductive plate; 42. a moving contact clamping piece; 43. a pin assembly; 5. a stationary contact assembly; 51. a first fixed contact; 52. a second fixed contact; 6. an auxiliary contact assembly; 7. a transition resistance; 8. and supporting the shaft.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Examples

The present embodiment provides a capacity-regulating contact device of an on-load tap-changer, as shown in fig. 1 to 3, including a movable contact base 3 and a stationary contact assembly 5.

Three movable contact seat 3 sets up on first support 1, first support 1 receives external force drive, drives movable contact seat 3 is along sharp reciprocating motion, as shown in fig. 4, movable contact seat 3 is equipped with two sets of main contact subassembly 4 along its moving direction's both sides branch, as shown in fig. 5, main contact subassembly 4 includes: the conductive plate 41 is integrally formed on the moving contact base 3 and is provided with a first through hole; two moving contact clamping pieces 42 which are respectively arranged at the upper side and the lower side of the conducting plate 41 and are provided with second through holes which are arranged opposite to the first through holes, and the parts of the two moving contact clamping pieces 42 which extend out of the conducting plate 41 are opposite to form a clamping space which is suitable for clamping a static contact; the pin assembly 43 includes a pin and a spring sleeved on the pin, the pin penetrates through the first through hole and the second through hole to fixedly connect the two movable contact clamping pieces 42 with the conductive plate 41, and the spring abuts against the movable contact clamping pieces 42 to provide pressure for the movable contact clamping pieces 42 to move towards the conductive plate 41. The movable contact seat 3 is provided with two auxiliary contact assemblies 6 and two main contact assemblies 4 along one side of the moving direction in a staggered manner, a transition resistor 7 is arranged on one side of the movable contact seat 3, which is far away from the fixed contact component 5, the transition resistor 7 is respectively connected with the auxiliary contact component 6 and the main contact component 4 through wires, in the embodiment, the specific structure of the auxiliary contact assembly 6 is the same as that of the main contact assembly 4, the width of the contact clip of the auxiliary contact assembly 6 is smaller than that of the contact clip of the main contact assembly 4, and it should be noted that, by arranging the auxiliary contact assembly 6 and the transition resistor 7, the transformer can be prevented from being powered off temporarily when the gears are switched, the above arrangement is a mature technology, and therefore, the detailed connection mode and the operation principle among the auxiliary contact assembly 6, the transition resistor 7 and the main contact assembly 4 are not described in detail.

As shown in fig. 6 to 9, the fixed contact assembly 5 is disposed on the second support 2, and includes two first fixed contacts 51 and two second fixed contacts 52 sequentially disposed along the length direction of the second support 2, where the first fixed contact 51 has two first fixed contact plates disposed in parallel, the second fixed contact 52 is a U-shaped fixed contact, a support shaft 8 in guiding transition fit with the main contact assembly 4 is further disposed between two adjacent first fixed contacts 51 and between the first fixed contact 51 and the second fixed contact 52, a distance between the support shaft 8 and two adjacent fixed contacts is smaller than a width of the movable contact clip 42, in this embodiment, a height of the support shaft 8 is the same as a height of the first fixed contact plate and the U-shaped fixed contact plate, and the support shaft 8 is cylindrical. When two main contact assemblies 4 arranged oppositely up and down are connected with two first static contact plates, two transformer windings correspondingly connected with the two main contact assemblies 4 are in a parallel connection state, and when the two main contact assemblies 4 are connected with a second static contact 52, the second static contact 52 is a U-shaped static contact plate, so that the two transformer windings correspondingly connected with the two main contact assemblies 4 are in a series connection state, and switching from high capacity to low capacity is realized. As shown in fig. 2, the gear selection mechanism is in a high-capacity gear, two groups of main contact assemblies 4 are respectively connected to corresponding first fixed contacts, and when the gear selection mechanism moves from the right side in fig. 2 to the low-capacity gear shown in fig. 3, one of the main contact assemblies 4 is connected to the first fixed contact 51, and the other group of main contact assemblies 4 is connected to the second fixed contact 52.

The utility model discloses an it transfers holds contact device to have on-load tap-changer because main contact subassembly 4 adopts the mode that relative independent distributes from top to bottom, makes great that creepage distance between the two can set up like this, is difficult for producing electric arc, and the security performance is higher, and life is longer.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims (5)

1. The capacity-regulating contact device of the on-load tap-changer is characterized in that: the method comprises the following steps:

the movable contact seats (3) are arranged on the first support (1), the first support (1) is driven by external force to drive the movable contact seats (3) to reciprocate linearly, and two groups of main contact assemblies (4) are respectively arranged on two sides of each movable contact seat (3) along the moving direction of the movable contact seat;

and the plurality of static contact assemblies (5) are arranged on the second support (2) and are provided with static contacts connected or disconnected with the main contact assembly (4).

2. The on-load tap changer capacitance regulating contact arrangement of claim 1, wherein: the main contact assembly (4) comprises:

the conductive plate (41) is integrally formed on the movable contact seat (3) and is provided with a first through hole;

the two moving contact clamping pieces (42) are respectively arranged on the upper side and the lower side of the conductive plate (41) and are provided with second through holes which are arranged opposite to the first through holes, and the parts of the two moving contact clamping pieces (42) which extend out of the conductive plate (41) are opposite to form clamping spaces suitable for clamping static contacts;

and the pin assembly (43) fixedly connects the two movable contact clamping pieces (42) and the conductive plate (41) after penetrating through the first through hole and the second through hole.

3. The on-load tap changer capacitance regulating contact arrangement of claim 2, wherein: move contact seat (3) and be provided with two auxiliary contact subassembly (6) and two along one side of its direction of movement in a staggered manner main contact subassembly (4), move contact seat (3) and keep away from one side of quiet contact subassembly (5) is equipped with transition resistance (7), transition resistance (7) pass through the wire respectively with auxiliary contact subassembly (6) with main contact subassembly (4) link to each other.

4. The on-load tap changer capacitance regulating contact arrangement of claim 3, wherein: the fixed contact assembly (5) comprises two first fixed contacts (51) and a second fixed contact (52) which are sequentially arranged along the length direction of the second support (2), the first fixed contacts (51) are provided with two first fixed contact plates which are arranged in parallel relatively, and the second fixed contacts (52) are U-shaped fixed contact plates.

5. The on-load tap changer capacitance regulating contact arrangement of claim 4, wherein: and support shafts (8) in guide transition fit with the main contact assembly (4) are arranged between two adjacent first fixed contacts (51) and between the first fixed contacts (51) and the second fixed contacts (52).

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