Delay quick-action auxiliary switch

Abstract

The utility model provides a time-delay quick-action auxiliary switch, which solves the problem that the time-delay quick-action auxiliary switch of the existing high-voltage circuit breaker operating mechanism is difficult to adjust the length of a common time-delay static contact and high in disassembly and use cost. The technical scheme is that the time-delay quick-moving auxiliary switch comprises a driving rod which is supported and assembled through an insulating base, and a fixing groove of the insulating base is internally provided with a common moving contact, a time-delay quick-moving moving contact and a common time-delay moving contact which are assembled with the driving rod respectively and matched with the common static contact, the time-delay quick-moving moving contact and the common time-delay static contact. The common time-delay moving contact comprises a static contact straight rod section extending out of the base and a static contact arc-shaped section arranged in a fixing groove of the insulating base, and an arc-shaped static contact extension adjusting section matched with the common time-delay moving contact is inserted and fixed at the front end of the static contact arc-shaped section. An operator can replace and adjust conveniently, and the disassembly and assembly time and the device use cost are saved.

Description

Technical Field

[0001] The utility model relates to the technical field of high-voltage electrical switch devices, in particular to a time-delayed quick-acting auxiliary switch suitable for a high-voltage circuit breaker operating mechanism. Background Art

[0002] At present, the "closing and opening" of high-voltage circuit breakers refers to the immediate opening after several thousand milliseconds after closing, and the closing and opening time, that is, the metal short-circuit time, is the key time parameter affecting the circuit breaker's breaking capacity. It is difficult to control the closing and opening time, and there is no good solution at home and abroad. Auxiliary switches are one of the most important components to ensure the safe operation of power grids. Auxiliary switches send out on or off signals according to the angular position of the rotor, and are used for various operating mechanisms of high-voltage circuit breakers to control the switching of closing and opening circuits, interlocking protection, etc. However, conventional auxiliary switches do not have a delayed quick-action function and cannot meet the requirements of the metal short-circuit time. High-voltage circuit breakers usually use auxiliary switches with additional delay relays to ensure their closing and opening time. This method is relatively cumbersome, and the introduction of delay relays increases the production cost.

[0003] The patent document with the announcement number CN201298514Y discloses a time-delayed quick-acting auxiliary switch, which is assembled by a plurality of moving contacts driven by an active rod and a plurality of static contacts installed by an insulating base. Among them, ordinary moving contacts, ordinary time-delay moving contacts and time-delayed quick-acting moving contacts are respectively assembled on the active rod, and ordinary static contacts, ordinary time-delayed static contacts and time-delayed quick-acting static contacts are respectively arranged at the corresponding positions of the insulating base, and the energy storage and release of the torsion spring are used to achieve the effect of delayed connection and delayed disconnection of the auxiliary switch. Fundamentally solve the problem that the closing and opening time control of high-voltage circuit breakers is difficult. The sleeve assembled on the active rod is driven by the driven card during the process of torsion spring energy release, and the time-delayed quick-acting moving contact assembled on the sleeve rotates around the active rod to achieve separation and closing with the time-delayed quick-acting static contacts; by changing the length of the ordinary time-delayed static contact and adjusting the technical parameters of the torsion spring, the interval time from separation to closing with the ordinary time-delayed moving contact is achieved, thereby achieving the purpose of delay. The problem is that the ordinary time-delay static contact is an integral component, including a straight rod section extending out of the base and an arc section arranged in a fixed groove of the insulating base. The length of the ordinary time-delay static contact is set according to the length of the end of the arc section and the rotational contact angle position of the ordinary time-delay moving contact. When the length of the ordinary time-delay static contact is adjusted as needed, it is necessary to replace the ordinary time-delay static contact as a whole and select an ordinary time-delay static contact with an arc section of different lengths. Therefore, the working hours for disassembly and installation are increased, and the cost of replacing spare parts is also increased, which brings inconvenience to the adjustment of the ordinary time-delay static contact. Summary of the invention

[0004] The purpose of the utility model is to provide a time-delay quick-acting auxiliary switch, which solves the problem that the conventional time-delay quick-acting auxiliary switch of the operating mechanism of a high-voltage circuit breaker is difficult to adjust the length of the ordinary time-delay static contact, resulting in high disassembly and assembly costs. It uses a basic configuration of static contacts in conjunction with an arc-shaped static contact extension adjustment section to facilitate setting the static contact length and save device use costs.

[0005] The technical scheme adopted by the utility model is: the time-delayed quick-acting auxiliary switch comprises: an active rod supported and assembled by an insulating base, the active rod is provided with a common moving contact, a time-delayed quick-acting moving contact and a common time-delayed moving contact, the fixed groove of the insulating base is provided with a common static contact, a time-delayed quick-acting static contact and a common time-delayed static contact respectively matching the common moving contact, the time-delayed quick-acting moving contact and the common time-delayed moving contact, the common time-delayed moving contact comprises a static contact straight rod section extending outside the base and a static contact arc section arranged in the fixed groove of the insulating base, and the technical key points are: the common time-delayed moving contact is provided with ... the technical key points are: the common time-delayed moving contact is provided with The static contact arc section of the static contact is a short arc, and the front end of the static contact arc section is plugged and fixed with an arc-shaped static contact extension adjustment section that matches the ordinary delayed moving contact. The front end of the arc-shaped static contact extension adjustment section is a thin plate contact for contacting the ordinary delayed moving contact, and the rear end of the arc-shaped static contact extension adjustment section is an elastic clamping plate for clamping the axial surface of the ordinary delayed static contact arc section. The two inner clamping surfaces of the elastic clamping plate of the arc-shaped static contact extension adjustment section are provided with a plurality of limiting arc surface protrusions, and the two side surfaces of the ordinary delayed static contact arc section are provided with arc-shaped bottom surface grooves that match and position the limiting arc surface protrusions.

[0006] The number of arc surface limiting protrusions on the inner clamping surfaces on both sides of the elastic clamp is three, arranged at the vertices of a triangle, and the number of arc bottom surface grooves corresponding to the arc segment of the ordinary delayed static contact and the inner clamping surface of the elastic clamp is also three, arranged corresponding to the arc surface limiting protrusions.

[0007] The advantages and positive effects of the utility model are as follows: since the active rod adopted by the utility model is provided with an ordinary moving contact, a delayed fast moving contact and an ordinary delayed moving contact, three kinds of matching static contacts, namely ordinary static contacts, delayed fast moving static contacts and ordinary delayed static contacts, are provided in the fixing groove of the insulating base, wherein the arc segment of the ordinary delayed static contact serves as a universal basic configuration, which is convenient for plugging in arc-shaped static contact extension adjustment segments of different lengths; an arc-shaped static contact extension adjustment segment matching the ordinary delayed moving contact is plugged and fixed at the front end of the arc segment of the ordinary delayed static contact, the front end of the arc-shaped static contact extension adjustment segment is a thin plate contact for contacting the ordinary delayed moving contact, and the rear end of the arc-shaped static contact extension adjustment segment is an elastic clamp for clamping the axial surface of the static contact arc segment. It is convenient to plug in arc-shaped static contact extension adjustment sections of different corresponding lengths according to the rotational positioning position of the contact setting of the common time-delay moving contact; and a plurality of limiting arc surface protrusions are arranged on the inner clamping surface of the elastic clamp of the arc-shaped static contact extension adjustment section, and an arc-shaped bottom surface groove matching and positioning with the limiting arc surface protrusion is arranged on the side of the arc-shaped static contact arc section, which can be quickly positioned when installing and replacing the arc-shaped static contact extension adjustment section, and increase the firmness of the clamping. The above structure is adopted, that is, it is convenient to set the same universal static contact, and then match and plug in the corresponding arc-shaped static contact extension adjustment section, and it is possible to adjust and replace the arc-shaped static contact extension adjustment section of different corresponding lengths according to the required position change of the moving contact, without having to replace each static contact, so as to achieve the purpose of adjustment. Therefore, it uses the basic configuration of the static contact to cooperate with the arc-shaped static contact extension adjustment section, which is convenient for the operator to replace and adjust, and saves the man-hours of disassembly and installation and the cost of using the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The utility model is further described below in conjunction with the accompanying drawings.

[0009] Figure 1 It is a specific structural schematic diagram of the utility model;

[0010] Figure 2 yes Figure 1 Cross-sectional view along HH direction;

[0011] Figure 3 yes Figure 1 Section view along AA direction;

[0012] Figure 4 yes Figure 1 Cross-sectional view along BB direction;

[0013] Figure 5 yes Figure 1 Cross-sectional view along CC direction;

[0014] Figure 6 yes Figure 1 Cross-sectional view along DD direction;

[0015] Figure 7 This is a schematic diagram of the structure of a common time-delay static contact of the utility model;

[0016] Figure 8 yes Figure 7 Cross-sectional view along EE direction;

[0017] Fig. 9 yes Figure 7 Schematic diagram of the decomposed state structure.

[0018] Explanation of the serial numbers in the figure: 1 active rod, 2 retaining ring, 3 washer, 4 support plate, 5 insulating base, 51 base static contact fixing groove, 6 ordinary static contact, 7 ordinary delayed static contact, 8 delayed speed static contact, 9 baffle, 10 driven card, 11 washer, 12 main rotating card, 13 torsion spring, 14 short shank, 15 long rod, 16 ordinary moving contact, 17 ordinary delayed moving contact, 18 delayed speed moving contact, 19 sleeve, 20 driven rotor, 21 resistant ring, 22 open retaining ring, 23 card slot, 24 arc bottom groove, 25 limit arc surface protrusion, 71 static contact straight rod section, 72 static contact arc section, 73 arc static contact extension adjustment section, 73-1 thin plate contact, 73-2 elastic clamp. DETAILED DESCRIPTION

[0019] according to Figures 1 to 9 The specific structure of the utility model is described in detail, and the implementation example Figures 1 to 6As shown, a time-delayed quick-acting auxiliary switch is disclosed in the patent document with patent announcement number CN201298514Y by the inventor, which mainly includes: an active rod 1 assembled with a common moving contact 16, an insulating base 5 supported on the active rod 1 by a support plate 4, a common static contact 6 fixed on the insulating base 5 corresponding to the common moving contact 16, a baffle 9 fixed at the end of the insulating base 5, and long and short rods 15 and 14 fixed to the baffle 9 by bolt nuts, etc., wherein: when the active middle rod 1 drives the common moving contact 16 to rotate, the common opening static contact and the common closing static contact of the common static contact 6 are respectively contacted to achieve the purpose of opening and closing. At least two slots 23 are provided on the baffle plate 9, and there is a certain angle between the slots 23 connected by circular arcs. The circular shaft section of the active rod 1 on the inner side of the baffle plate 9 is assembled with a sleeve 19, and a delayed fast-moving moving contact 18 is assembled on the square outer wall of the sleeve 19. The insulating base 5 is provided with a delayed fast-moving static contact 8 corresponding to the delayed fast-moving moving contact 18, and the delayed fast-moving moving contact 18 can rotate around the active rod 1 with the sleeve 19; an ordinary delayed moving contact 17 is assembled on the active rod 1 at the end of the sleeve 19, and an ordinary delayed static contact 7 with adjustable length is provided in the base static contact fixing groove of the insulating base 5. When the ordinary delayed contact is used to achieve the delay effect, the length of the ordinary delayed static contact 7 can be adjusted, and the interval time and the connection angle of the ordinary delayed moving contact 17 contacting the ordinary delayed static contact 7 when rotating with the active rod 1 will change.

[0020] like Figure 7 As shown, the ordinary static contact 6, the delayed fast moving static contact 8 and the ordinary delayed static contact 7 all include a static contact straight rod section 71 extending outside the base and a static contact arc section 72 arranged in the base static contact fixing groove 51 of the insulating base. The present invention improves the structure of the ordinary delayed static contact 7, such as Figure 6 and Figure 7 As shown, the static contact arc segment 72 of the ordinary time-delay static contact is short arc-shaped, and the front end of the ordinary time-delay static contact arc segment 72 is plugged and fixed with an arc-shaped static contact extension adjustment segment 73 matching the ordinary time-delay moving contact 17, as shown in FIG. Figure 8 and Fig. 9As shown, the front end of the arc-shaped static contact extension adjustment section is a thin plate-shaped contact 73-1 for contacting the ordinary time-delay moving contact, and the rear end of the arc-shaped static contact extension adjustment section is an elastic clamp 73-2 for clamping the axial surface of the arc-shaped section of the ordinary time-delay static contact. The arc-shaped static contact extension adjustment section is used to clamp and fix the front end of the arc-shaped section of the ordinary time-delay static contact and fix it in the base static contact fixing groove 51, so that the front end of the ordinary time-delay static contact is extended to a position where it contacts and communicates with the ordinary time-delay moving contact. A plurality of limiting arc-shaped protrusions 25 are arranged on the two inner clamping surfaces of the elastic clamp of the arc-shaped static contact extension adjustment section, and arc-shaped bottom surface grooves 24 that match and position the limiting arc-shaped protrusions 25 are arranged on the two side surfaces of the arc-shaped section 72 of the ordinary time-delay static contact. It can be quickly positioned when installing and replacing the arc-shaped static contact extension adjustment section, and the firmness of the clamping is increased.

[0021] like Figures 1 to 7 As shown, the end of the sleeve 19 near the baffle 9 is covered with a driven rotating piece 20, and the head of the driven card 10 sleeved on the driven rotating piece 20 is clamped in the clamping groove 23 of the clapper 9. The active clasp 1 part outside the baffle 9 is flattened, and a torsion spring 13 and a main rotating card 12 are sleeved on it. The force arm of the torsion spring 13 contacts the main rotating card 12 and the driven card 10 respectively. A gasket 11 is arranged between the main rotating card 12 and the driven card 10, and an open retaining ring 22 is arranged at the upper end of the main rotating card 12 to fix and limit the main rotating card 12. The long and short rods 15 and 14 fixed on the baffle 9 play a connecting role for the switch, and are also used for installation and connection with the outside. The power input end of the active rod 1 is limited by the retaining ring 2 and the washer 3, and a resistant ring 21 is set between the active rod 1 and the support plate 4. The square inner diameter of the resistant ring 21 cooperates with the square shaft part of the active rod 1, and its circular outer wall cooperates with the inner diameter of the support plate 4, which plays the role of wave connection. Its working process and principle remain unchanged, and the delay contact can be set according to user needs. The overall delay speed moving and static contacts can be replaced without disassembly. The length of the delay speed moving and static contacts can be changed by replacing the appropriate arc-shaped static contact extension adjustment section as needed, and the disassembly and replacement are convenient and quick.

[0022] like Figure 7 As shown, as a further improvement, the number of the limiting arc surface protrusions 25 on the inner clamping surfaces of both sides of the elastic clamping plate can be three, arranged in a triangular vertex, and the number of the arc bottom surface grooves 24 corresponding to the arc segment of the ordinary delayed static contact and the inner clamping surface of the elastic clamping plate is also three, arranged corresponding to the limiting arc surface protrusions 25. The firmness of the clamping can be further increased and the number of limiting arc surface protrusions can be reduced.

[0023] It is also possible to use a short arc-shaped static contact arc segment of each static contact as a universal structure, the front end of the arc segment is respectively plugged into the arc static contact extension adjustment segment, the front end of the arc static contact extension adjustment segment is a thin plate contact for contacting each static contact, and the rear end of the arc static contact extension adjustment segment is an elastic clamp for clamping the axial surface of the static contact arc segment. The arc static contact extension adjustment segment adopts a length that matches the needs, and can be adjusted and replaced according to the required position change of the moving contact, only the arc static contact extension adjustment segment of different corresponding lengths is adjusted, and each static contact does not need to be replaced, so as to achieve the purpose of adjustment. It has universal applicability to hydraulic mechanisms and pneumatic mechanisms.

[0024] In summary, the purpose of the utility model is achieved.

Claims

1. A time-delayed quick-acting auxiliary switch, comprising: an active rod supported and assembled by an insulating base, the active rod being provided with a common moving contact, a time-delayed quick-acting moving contact and a common time-delayed moving contact, a common static contact, a time-delayed quick-acting static contact and a common time-delayed static contact respectively matching the common moving contact, the time-delayed quick-acting moving contact and the common time-delayed moving contact are provided in a fixed groove of the insulating base, the common time-delayed moving contact comprising a static contact straight rod section extending out of the base and a static contact arc section provided in a fixed groove of the insulating base, characterized in that : The static contact arc section of the ordinary time-delay static contact is a short arc, and an arc-shaped static contact extension adjustment section matching the ordinary time-delay moving contact is plugged and fixed at the front end of the arc-shaped static contact extension adjustment section, the front end of the arc-shaped static contact extension adjustment section is a thin plate contact for contacting the ordinary time-delay moving contact, and the rear end of the arc-shaped static contact extension adjustment section is an elastic clamping plate for clamping the axial surface of the arc-shaped static contact arc section of the ordinary time-delay static contact; the two inner clamping surfaces of the elastic clamping plate of the arc-shaped static contact extension adjustment section are provided with a plurality of limiting arc-shaped protrusions, and the two side surfaces of the arc-shaped static contact arc section are provided with arc-shaped bottom surface grooves matching and positioning the limiting arc-shaped protrusions.

2. The delayed quick-acting auxiliary switch according to claim 1, characterized in that : The number of arc surface limiting protrusions on the inner clamping surfaces on both sides of the elastic clamping plate is three, arranged at the vertices of a triangle, and the number of arc bottom surface grooves corresponding to the arc segment of the ordinary delayed static contact and the inner clamping surface of the elastic clamping plate is also three, arranged corresponding to the arc surface limiting protrusions.

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