CN102157296B - High-voltage dual-power supply changing-over combination switch - Google Patents

Abstract

The invention discloses a high-voltage dual-power switching combination switch. Two sets of upper static contacts are solidly sealed on the upper end of the insulating sleeve. The middle part of the sleeve is provided with a lower static contact, and the top of the lower static contact is connected with an upper movable contact. There is also a first rotating assembly that controls the rotation of the upper movable contact between the upper movable contact and the insulating sleeve. The upper part of the contact can be in contact with two sets of upper static contacts. The bottom end of the insulating sleeve is provided with a lower pile head, and the lower end of the lower pile head is passed through the insulating sleeve. A second rotating assembly for controlling the rotation of the lower moving contact is arranged between the moving contact and the lower part of the insulating sleeve. The advantages of the present invention are: reducing the number of switches and switchgears used, effectively reducing costs, improving the shortcoming of the single function of the dual power switch, realizing the integration of various functions such as switching, closing, isolation, and maintenance of the power supply, and improving the power supply. System reliability and efficiency.

Description

High voltage dual power switching combination switch

technical field

The invention relates to a high-voltage dual-power switching combination switch.

Background technique

At present, in China, two switchgears are used for power switching, closing, isolation, and maintenance of 12-24KV. The cabinets are equipped with electrical components such as load switches, isolating switches, and grounding switches. They are used by switching between the two switchgears. To achieve switching, closing, isolation, and maintenance lines, the cost is relatively high. Moreover, when a line failure occurs, it cannot be switched quickly, causing users to suffer greater economic losses.

Contents of the invention

The purpose of the present invention is to provide a high-voltage dual power supply switching combination switch, which can effectively solve the problems of high relative cost and slow switching speed of using two switch cabinets for power switching.

In order to solve the above-mentioned technical problems, the present invention is achieved through the following technical solutions: a high-voltage dual-power switching combination switch, including an insulating sleeve, an upper static contact, an upper moving contact, a first rotating assembly, a lower pile head, and a lower static contact , the lower moving contact, the grounding assembly, the grounding contact, and the second rotating assembly. The upper end of the insulating sleeve is sealed with two sets of upper static contacts, and the upper end of the upper static contact extends out of the insulating sleeve. The lower end of the upper static contact is set in the insulating sleeve, the middle part of the insulating sleeve is provided with the lower static contact, and the top of the lower static contact is connected with the upper moving contact, and the upper moving contact and the insulating sleeve There is also a first rotating assembly that controls the rotation of the upper moving contact. The upper part of the upper moving contact can be in contact with two sets of upper static contacts. The bottom end of the insulating sleeve is provided with a lower pile head. The lower end of the lower pile head is passed through the insulating sleeve, and the top of the lower pile head is connected with the lower moving contact. components.

Preferably, an arc extinguishing grid is provided at the lower end of each of the upper static contacts, and an arc extinguishing grid is also provided at the lower end of the lower static contact to prevent electric arcs from endangering electricity safety.

Preferably, the first rotating assembly includes a first rotating connecting seat and a first connecting rod, the first rotating connecting seat is rotatably arranged on the insulating sleeve, and the first rotating connecting seat is rotated with one end of the first connecting rod. connected, the other end of the first connecting rod is switched to the upper moving contact; the rotation of the upper moving contact is better controlled, and synchronous rotation of multiple groups of moving contacts can be realized at the same time.

Preferably, the second rotating assembly includes a second rotating connecting seat and a second connecting rod, the second rotating connecting seat is rotatably arranged at the lower part of the insulating sleeve, and the second rotating connecting seat and one end of the second connecting rod transfer, the other end of the second connecting rod is transferred to the lower moving contact; the rotation of the lower moving contact is better controlled, and synchronous rotation of multiple groups of moving contacts can be realized at the same time.

Preferably, the insulating sleeve includes an upper insulating sleeve, a middle insulating sleeve, and a lower insulating sleeve from top to bottom, and a layer of separator is provided in the middle of the middle insulating sleeve, forming a An airtight upper cavity, an airtight lower cavity is formed between the middle insulating sleeve and the lower insulating sleeve, the lower static contact passes through the partition of the middle insulating sleeve, and the upper part of the lower static contact is arranged in the upper space In the cavity, the lower part of the lower static contact is arranged in the lower cavity; the cavity is filled with gas that suppresses arc generation.

Preferably, the lower ends of the two sets of upper static contacts are all set on the same circular arc surface with the top of the lower static contacts as the center; so that the upper moving contacts can better switch between the two sets of upper static contacts.

Preferably, the lower part of the insulating sleeve is further provided with a grounding assembly, and a grounding contact is provided between the grounding assembly and the bottom of the insulating sleeve; the grounding assembly is provided to ensure the safety of workers during maintenance.

Preferably, the lower part of the lower static contact and the grounding contact are both arranged on the same arc surface with the top of the following pile head as the center of the circle; so that the lower moving contact can be better positioned between the grounding contact and the lower static contact. switch between.

Compared with the prior art, the present invention has the advantages of reducing the number of switches and switch cabinets used, effectively reducing the cost, improving the single-function shortcoming of the dual-power switching switch, and realizing the switching, closing, isolation, and maintenance of the power supply, etc. A variety of functions are integrated to improve the reliability and efficiency of the power supply system.

Description of drawings

FIG. 1 is a schematic structural diagram of a high-voltage dual-power switching combined switch of the present invention.

Fig. 2 is a schematic structural diagram of a three-phase alternating current switching device adopting a high-voltage dual power switching combined switch of the present invention.

Detailed ways

Referring to Fig. 1, Fig. 2 is the embodiment of the high-voltage dual power switching combination switch of the present invention, the high-voltage dual power switching combination switch includes an insulating sleeve 1, an upper static contact 2, an upper moving contact 3, a first rotating assembly, a lower pile Head 5, lower static contact 6, lower moving contact 7, grounding assembly 8, grounding contact 9, second rotating assembly, the upper end of the insulating sleeve 1 is sealed with two sets of upper static contacts 2, the upper The upper end of the static contact 2 extends out of the insulating sleeve 1, the lower end of the upper static contact 2 is arranged in the insulating sleeve 1, and the lower end of each upper static contact 2 is provided with an arc extinguishing grid 17, so The insulating cover 1 includes an upper insulating cover 11, a middle insulating cover 12, and a lower insulating cover 13 from top to bottom. The middle part of the middle insulating cover 12 is provided with a layer of separator 16, and the upper insulating cover 11 and the middle insulating cover 12 forms an airtight upper cavity 14, and forms an airtight lower cavity 15 between the middle insulating sleeve 12 and the lower insulating sleeve 13, and the lower static contact 6 passes through the partition plate 16 of the middle insulating sleeve 12, The upper part of the lower static contact 6 is arranged in the upper cavity 14, the lower part of the lower static contact 6 is arranged in the lower cavity 15, and the top of the lower static contact 6 is connected with the upper movable contact 3, The lower end of the lower static contact 6 is also provided with an arc extinguishing grid 17, and the first rotating assembly for controlling the rotation of the upper moving contact 3 is also connected between the upper moving contact 3 and the insulating sleeve 1. A rotating assembly includes a first rotating connection seat 18 and a first connecting rod 19, the first rotating connecting seat 18 is rotatably arranged on the insulating sleeve 1, and the first rotating connecting seat 18 is rotated with one end of the first connecting rod 19 Then, the other end of the first connecting rod 19 is transferred to the upper moving contact 3, and the lower ends of the two sets of upper static contacts 2 are all arranged on the same arc surface with the top of the lower static contact 6 as the center of the circle, The bottom end of the insulating sleeve 1 is provided with a lower pile head 5, the lower end of the lower pile head 5 passes through the insulating sleeve 1, and the top end of the lower pile head 5 is connected with a lower movable contact 7. Between the moving contact 7 and the lower part of the insulating sleeve 1, there is a second rotating assembly to control the rotation of the lower moving contact 7. The second rotating assembly includes a second rotating connection seat 20, a second connecting rod 21, and the second rotating assembly The rotating connecting seat 20 is rotatably arranged at the lower part of the insulating sleeve 1, the second rotating connecting seat 20 is connected to one end of the second connecting rod 21, and the other end of the second connecting rod 21 is connected to the lower moving contact 7 , the lower part of the insulating sleeve 1 is also provided with a grounding assembly 8, and a grounding contact 9 is provided between the grounding assembly 8 and the bottom of the insulating sleeve 1, and the lower part of the lower static contact 6 and the grounding contact 9 are both provided On the same circular arc surface that the pile head 5 top is the center of circle.

As shown in Fig. 2, for three-phase alternating current, three groups of above-mentioned switches are set in a main switch, the first rotating connection seat 18 of each group of switches is connected in series through the first transmission rod, and the first transmission rod is connected with the first driving device 22, with Realize the synchronous rotation of the three upper moving contacts 3; the second rotating connection seat 20 of each group of switches is connected in series through the second transmission rod, and the second transmission rod is connected with the second driving device 23 to realize the synchronization of the three lower moving contacts 7 turn. Both the upper cavity 14 and the lower cavity 15 are filled with SF6 gas with a pressure of 0.4 bar.

When the running circuit breaks down, the control unit sends a switching signal, the first driving device 22 drives the first transmission rod to rotate the upper moving contact 3, and the upper moving contact 3 breaks away from one upper static contact 2 and swings to the other. The static contact 2 completes a switching process until it is in full contact. When switching in reverse, the process is the same and the direction is opposite.

When the circuit is disconnected, the second drive device 23 obtains a cut-off signal, and drives the second transmission rod to make all the lower moving contacts 7 rotate away from the lower static contacts 6 to realize cutting off. The process is the same when closing in reverse, but in the opposite direction.

When grounding maintenance is required, the second driving device 23 obtains the grounding signal, drives the second transmission lever to rotate all the lower moving contacts 7, breaks away from the lower static contacts 6 and connects with the grounding contacts 9, and realizes grounding.

The above is only a specific embodiment of the present invention, but the technical characteristics of the present invention are not limited thereto, any changes or modifications made by those skilled in the art within the field of the present invention are covered by the patent scope of the present invention among.

Claims (8)

1. combined switch for switching of double high-voltage power sources, it is characterized in that: comprise insulating case (1), upper static contact (2), upper moving contact (3), the first runner assembly, lower pile crown (5), lower fixed contact (6), lower moving contact (7), grounding assembly (8), grounding contact (9), the second turning discreteness, the upper end of described insulating case (1) is sealed with two groups of upper static contacts (2), stretch out outside insulating case (1) upper end of described upper static contact (2), the lower end of described upper static contact (2) is arranged in insulating case (1), the middle part of described insulating case (1) is provided with lower fixed contact (6), the top switching of described lower fixed contact (6) has upper moving contact (3), also be connected with between described upper moving contact (3) and insulating case (1) and control the first runner assembly that upper moving contact (3) rotates, the top of described upper moving contact (3) can contact with two groups of upper static contacts (2), the bottom of described insulating case (1) is provided with lower pile crown (5), the lower end of lower pile head (5) wore insulating case (1), the top switching of lower pile head (5) has lower moving contact (7), be provided with between described lower moving contact (7) and insulating case (1) bottom and control the second turning discreteness that lower moving contact (7) rotates.

2. combined switch for switching of double high-voltage power sources as claimed in claim 1, it is characterized in that: the lower end of described each upper static contact (2) is equipped with an arc-chute (17), and the lower end of described lower fixed contact (6) also is provided with an arc-chute (17).

3. combined switch for switching of double high-voltage power sources as claimed in claim 1 or 2, it is characterized in that: described the first runner assembly comprises that first is rotationally connected seat (18), head rod (19), described first is rotationally connected seat (18) rotation is arranged on insulating case (1), described first is rotationally connected seat (18) transfers with an end of head rod (19), the other end of described head rod (19) and upper moving contact (3) switching.

4. combined switch for switching of double high-voltage power sources as claimed in claim 1 or 2, it is characterized in that: described the second turning discreteness comprises that second is rotationally connected seat (20), the second connecting rod (21), described second is rotationally connected seat (20) rotates the bottom that is arranged on insulating case (1), described second is rotationally connected seat (20) transfers with an end of the second connecting rod (21), the other end of described the second connecting rod (21) and lower moving contact (7) switching.

5. combined switch for switching of double high-voltage power sources as claimed in claim 1, it is characterized in that: described insulating case (1) comprises insulating case (11) from top to bottom successively, middle insulating case (12), lower insulating case (13), the middle part of described middle insulating case (12) is provided with one deck dividing plate (16), form airtight upper plenum (14) between described upper insulating case (11) and middle insulating case (12), form airtight lower cavity (15) between described middle insulating case (12) and lower insulating case (13), the dividing plate (16) of insulating case (12) during described lower fixed contact (6) wore, the top of described lower fixed contact (6) is arranged in upper plenum (14), the bottom of described lower fixed contact (6) is arranged in lower cavity (15).

6. combined switch for switching of double high-voltage power sources as claimed in claim 1 is characterized in that: it is on the same arc surface in the center of circle that the lower end of described two groups of upper static contacts (2) all is arranged on following fixed contact (6) top.

7. combined switch for switching of double high-voltage power sources as claimed in claim 1, it is characterized in that: the bottom of described insulating case (1) also is provided with grounding assembly (8), is provided with grounding contact (9) between described grounding assembly (8) and insulating case (1) bottom.

8. combined switch for switching of double high-voltage power sources as claimed in claim 7 is characterized in that: it is on the same arc surface in the center of circle that the bottom of described lower fixed contact (6) and grounding contact (9) all are arranged on following pile crown (5) top.

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