Disconnector closing and opening assisting device and circuit breaker

Abstract

The present invention discloses a disconnector closing and opening assisting device and a circuit breaker. The disconnector closing and opening assisting device includes a driving shaft and an elastic assisting component; the elastic assisting component always applies an elastic acting force to the toggle arm. The elastic assisting component has a first state when the isolating knife is in the open position and a second state when the isolating knife is in the closed position. When the driving shaft is driven to rotate by an external force, it drives the isolating knife to close and open and causes the elastic assisting component to switch between the first state and the second state. When the elastic assisting component is in the first state, it forms a first V-shaped angle with the toggle arm, and when in the second state, it forms a second V-shaped angle with the toggle arm. The openings of the first V-shaped angle and the second V-shaped angle face each other. In the present invention, the structure of the disconnector closing and opening assisting device is reasonable, and it can provide good assistance for both the closing and opening of the isolating knife switch, making the closing and opening actions of the disconnector faster.

Description

Technical Field

[0001] The present invention relates to a disconnector closing and opening assisting device and a circuit breaker, belonging to the field of pole-mounted circuit breaker structure design. Background Art

[0002] Pole-mounted circuit breakers play a crucial role in intelligent distribution networks. Some of the existing pole-mounted circuit breakers on the market are generally equipped with disconnectors externally. Such pole-mounted circuit breakers are relatively large in size, and because the disconnectors are externally placed, they are easily affected by salt spray, humidity, etc., thereby affecting the opening and closing performance of the switches. In response to this situation, there are also pole-mounted circuit breakers with built-in disconnectors on the market, thus eliminating the deficiencies of the pole-mounted circuit breakers with externally placed disconnectors. The disconnectors in the existing pole-mounted circuit breakers rely on an external driving mechanism to drive the driving shaft to rotate when closing and opening, and then drive the isolating knife to complete the closing and opening actions. Some disconnectors are matched with a assisting mechanism to make the disconnector open more quickly during opening, but do not have the assisting function for quick closing. Summary of the Invention

[0003] In view of this, the present invention aims to provide a disconnector closing and opening assisting device and a circuit breaker with a reasonable structure. By setting the disconnector closing and opening assisting device, it can assist the opening and closing actions of the isolating knife in the disconnector, thereby making the opening and closing actions more rapid.

[0004] The technical solution for achieving the object of the present invention is as follows:

[0005] A disconnector closing and opening assisting device includes a driving shaft that drives the isolating knife to close and open when rotating; it further includes an elastic assisting component with one end movably connected to an elbow arm fixed on the driving shaft and the other end movably connected to a fixed frame; the elastic assisting component always exerts an elastic acting force on the elbow arm, and the elastic assisting component has a first state when the isolating knife is in the open position and a second state when the isolating knife is in the closed position; when the driving shaft is driven by an external force to rotate, it drives the isolating knife to close and open and makes the elastic assisting component switch between the first state and the second state. When the elastic assisting component is in the first state, it forms a first V-shaped angle with the elbow arm, and when in the second state, it forms a second V-shaped angle with the elbow arm, and the openings of the first V-shaped angle and the second V-shaped angle face each other.

[0006] In the above technical solution, the elastic assist component includes a first spring seat, a spring, a connecting rod, a second spring seat and a rotating block. The rotating block is rotatably mounted on the fixed frame. One end of the connecting rod is hinged to the end of the crank arm through a connecting shaft, and the other end passes through a through hole on the rotating block. The first spring seat is positioned and sleeved on the connecting rod near the crank arm. The second spring seat is movably sleeved on the connecting rod near the rotating block. The spring is sleeved on the connecting rod and its two ends respectively abut against the first spring seat and the second spring seat. Under the action of the spring, the second spring seat abuts against the rotating block. When the elastic assist component is in the first state, the first position where the connecting shaft is located and when the elastic assist component is in the second state, the second position where the connecting shaft is located are respectively on both sides of the connecting line between the axis of the driving shaft and the axis of the rotating block.

[0007] In the above technical solution, an external thread portion is provided on the connecting rod, and the first spring seat is screwed to the external thread portion.

[0008] In the above technical solution, a stop member that abuts against the crank arm when the elastic assist component is in the first state is further included.

[0009] In the above technical solution, the stop member is a stop bolt, and the stop bolt is screwed and fixed on the mounting seat.

[0010] A circuit breaker includes a circuit breaker body with an internal disconnecting switch, and the circuit breaker body includes the above-mentioned disconnecting switch closing and opening assist device.

[0011] In the above technical solution, mounting members are provided at the top of the circuit breaker body, and a support mounting seat is fixed at the bottom; the number of the mounting members is two, which are oppositely arranged on the upper part of the circuit breaker body, and each mounting member includes a fixing plate, two hanging hooks and a limiting plate. The fixing plate is fixed on the circuit breaker body. The two hanging hooks are arranged at intervals and the lower ends are connected to the fixing plate, and the upper ends are connected to the limiting plate. Hoisting hooks are integrally formed at both side ends of the fixing plate.

[0012] Two hanging holes are provided at intervals on the fixing plate, two sleeve holes are correspondingly provided on the limiting plate. The lower ends of the two hanging hooks are in a hook shape and are hooked in the corresponding hanging holes. The upper ends of the two hanging hooks have screw rod portions, and the screw rod portions pass through the corresponding sleeve holes and a limiting nut is provided thereon.

[0013] In the above technical solution, a clamping member is movably sleeved on each screw rod portion between the limiting nut and the limiting plate. The clamping member has a notch for clamping with the limiting plate. One of the two sleeve holes on each limiting plate is a round hole, and the other is a slot hole with an opening on the side.

[0014] In the above technical solution, there are two support mounting seats, which are relatively fixed on both sides of the bottom of the circuit breaker body.

[0015] The present invention has positive effects: The on-off assisting device for the disconnector in the present invention has a reasonable structure. During actual application, the elastic assisting component always exerts an elastic acting force on the toggle arm. When an external force drives the driving shaft to rotate, during the process of the isolating knife being driven to switch between on and off, the angle direction between the elastic assisting component and the toggle arm is reversed. After the reversal, due to the change in the acting force direction of the elastic assisting component, the elastic assistance generated for the isolating knife promotes the quick on and off actions of the isolating knife, and makes the contact more reliable in the on state. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the on-off assisting device for the disconnector in the present invention;

[0017] Figure 2 It is Figure 1 a structural diagram when the fixed frame and the rotating block in

[0018] Figure 3 a structural diagram when the elastic assisting component of the on-off assisting device for the disconnector is in the first state during application;

[0019] Figure 4 a structural diagram when the elastic assisting component of the on-off assisting device for the disconnector is in the second state during application;

[0020] Figure 5 It is a structural diagram of the circuit breaker in the present invention;

[0021] Figure 6 It is a structural diagram of the mounting member in the present utility model;

[0022] Figure 7 It is Figure 1 an exploded view of the mounting member shown in

[0023] The reference numerals shown in the drawings are: 01 - circuit breaker body; 1 - driving shaft; 2 - isolating knife; 3 - toggle arm; 4 - first spring seat; 5 - spring; 6 - connecting rod; 61 - external thread part; 7 - second spring seat; 8 - rotating block; 8 - perforation; 9 - connecting shaft; 10 - fixed frame; 11 - stop member; 12 - mounting seat; 20 - Anzuang member; 21 - fixing plate; 22 - hoisting hook; 23 - hanging hole; 24 - hem; 25 - fixing hole; 26 - hook; 261 - screw part; 27 - limiting plate; 271 - sleeve hole; 28 - limiting nut; 29 - clamping member; 30 - support mounting seat. DETAILED DESCRIPTION OF THE INVENTION

[0024] The following describes the specific structure in the present invention with reference to the drawings of the specification:

[0025] Embodiment 1, Disconnector Closing and Opening Boosting Device

[0026] An isolating switch opening and closing assisting device in this embodiment has a structure as shown in Figures 1 to 4 and includes a driving shaft 1 and an elastic assisting component. The driving shaft 1 is connected to an isolating blade 2 through a transmission member. When the driving shaft 1 rotates, it drives the isolating blade 2 to open and close. One end of the elastic assisting component is movably connected to an elbow arm 3 fixed on the driving shaft 1, and the other end is movably connected to a fixing bracket 10 (fixed on the housing of the circuit breaker). The elastic assisting component always applies an elastic acting force to the elbow arm 3. The elastic assisting component has a first state when the isolating blade 2 is in the open position and a second state when the isolating blade 2 is in the closed position. When the driving shaft 1 is driven to rotate by an external force, it drives the isolating blade 2 to open and close and makes the elastic assisting component switch between the first state and the second state. When the elastic assisting component is in the first state, it forms a first V-shaped angle with the elbow arm 3, and when in the second state, it forms a second V-shaped angle with the elbow arm 3. The openings of the first V-shaped angle and the second V-shaped angle face each other. In actual application of the isolating switch opening and closing assisting device in this embodiment, the elastic assisting component always applies an elastic acting force to the elbow arm 3. When an external force drives the driving shaft 1 to rotate, during the process of the isolating blade 2 being driven to switch between opening and closing, the angle direction between the elastic assisting component and the elbow arm reverses. After the reversal, due to the change in the acting force direction of the elastic assisting component, the elastic assisting force generated on the isolating blade promotes the quick opening and closing actions of the isolating blade, and makes the contact more reliable in the closed state.

[0027] As a more specific embodiment, the elastic assist component in this embodiment includes a first spring seat 4, a spring 5, a connecting rod 6, a second spring seat 7, and a rotating block 8. The rotating block 8 is rotatably mounted on the fixed frame 10. One end of the connecting rod 6 is hinged to the end of the crank arm 3 through a connecting shaft 9, and the other end passes through a through hole 81 on the rotating block 8. The first spring seat 4 is positioned and sleeved on the connecting rod 6 near the crank arm 3. The second spring seat 7 is movably sleeved on the connecting rod 6 near the rotating block 8. The spring 5 is sleeved on the connecting rod 6 and its two ends respectively abut against the first spring seat 4 and the second spring seat 7. Under the action of the spring 5, the second spring seat 7 abuts against the rotating block 8. When the elastic assist component is in the first state, the first position where the connecting shaft 9 is located and when the elastic assist component is in the second state, the second position where the connecting shaft 9 is located are respectively on both sides of the connecting line L between the axis of the driving shaft 1 and the axis of the rotating block 8. During actual use, the elastic force generated by the spring 5 is applied to the first spring seat 4, and the first spring seat 4 is positioned on the connecting rod 6. Thus, the elastic force applied by the spring 5 acts on the connecting rod 6 and the crank arm 3 connected to the connecting rod 6. When the driving shaft 1 rotates, the connecting rod 6 is driven by the crank arm 3 to rotate synchronously with the rotating block 8. At the same time, the connecting rod 6 will generate axial movement in the through hole 81. When the connection point between the connecting rod 6 and the crank arm 3 is on the connecting line L, a force balance state is reached. When the connection point between the connecting rod 6 and the crank arm 3 is on one side of the connecting line L, the acting force applied by the spring 5 will prompt the crank arm 3 to maintain the tendency to rotate towards this side, thereby generating an elastic assist to make the driving shaft 3 rotate faster to achieve the purpose of rapid opening and closing.

[0028] In this embodiment, an external thread portion 61 is provided on the connecting rod 6. The first spring seat 4 is screwed to the external thread portion 61. By connecting the first spring seat 4 to the connecting rod 6 in a screwed manner, in actual operation, the position of the first spring seat 4 in the axial direction of the connecting rod 6 can be adjusted by screwing, thereby adjusting the pre-tightening elastic force of the spring 5.

[0029] Further, it further includes a stop member 11 that abuts against the crank arm 3 when the elastic assist component is in the first state. By providing the stop member 11, during the opening process of the disconnector, the stop member 11 abuts against the crank arm 3 to prevent the driving shaft 1 from continuing to rotate, thereby playing a stopping role.

[0030] In this embodiment, the stop member 11 is a stop bolt. The stop bolt is screwed and fixed on the mounting seat 12, and the position of the stop bolt can be adjusted to limit the rotation amplitude of the driving shaft 1.

[0031] Embodiment 2, Circuit Breaker

[0032] This embodiment relates to a circuit breaker, which applies the disconnector closing and opening assisting device described in Embodiment 1 and has the advantages described in Embodiment 1.

[0033] Embodiment 3, Circuit Breaker

[0034] This embodiment is an improved solution based on Embodiment 2. As Figures 5 to 7 shown, in the circuit breaker of this embodiment, an installation member 20 is provided at the top of the circuit breaker body 01, and a support mounting seat 30 is fixed at the bottom; the number of the installation members is two, which are oppositely arranged at the top of the circuit breaker body, and each installation member includes a fixing plate 21, two hooks 26 and a limiting plate 27. The fixing plate 21 is fixed on the upper part of the circuit breaker body 01. The two hooks 26 are arranged at intervals and the lower ends are connected to the fixing plate 21, and the upper ends are connected to the limiting plate 27. Hoisting hooks 22 are integrally formed on both side ends of the fixing plate 21. The structure of the circuit breaker in this embodiment is reasonable. When installing, the circuit breaker is fixedly installed through the cooperation of the installation member 20 and the support mounting seat 30 (specifically, the installation member is connected to the reinforcement cross beam on the electric pole, and the support mounting seat 30 is connected to the fixing frame on the electric pole), and the circuit breaker is fixedly installed from the upper and lower ends, and the installation stability is good; and in the above installation member, by integrally forming the hoisting hook 22 on the fixing plate 21, there is no need to assemble the hoisting hook 22 additionally, reducing the number of component parts and having a simple structure; further, two hanging holes 11 are arranged at intervals on the fixing plate 21, two sleeve holes 271 are correspondingly arranged on the limiting plate 27, the lower ends of the two hooks 26 are in a hook shape and are hooked in the corresponding hanging holes 11, the upper ends of the two hooks 26 have screw rod parts 261, the screw rod parts 261 pass through the corresponding sleeve holes 271 and limiting nuts 28 are arranged thereon. With the above scheme, the assembly is convenient. When applying this installation member to the circuit breaker, an insertion hole is formed among the two hooks 26, the fixing plate 21 and the limiting plate 27, and the insertion hole is inserted and connected with the reinforcement cross beam on the electric pole.

[0035] Furthermore, in this embodiment, a clamping member 29 is movably sleeved on each screw rod part 261 between the limiting nut 28 and the limiting plate 27. The clamping member 29 has a notch for clamping with the limiting plate 27. One of the two sleeve holes 271 on each limiting plate 27 is a round hole, and the other is a slot hole with an opening on the side. During actual use, the limiting plate 27 can rotate around the screw rod part 261 matched with the round hole, and after rotation, the slot hole is clamped or separated from the corresponding screw rod part 261. When the slot hole forms a clamping connection with the corresponding screw rod part 261, the limiting plate 27 is limited by the cooperation of the notch on the clamping member 29 and the limiting plate 27 so that the limiting plate 27 cannot rotate any more, and then the limiting plate can be locked and limited by tightening the limiting nut 28, and the operation is relatively convenient. For details, please refer to the attached drawings. In this embodiment, the clamping member 29 is an integrally formed n-shaped part.

[0036] In this embodiment, the fixing plate 21 is integrally formed by stamping a metal plate. Flanging 24 is formed by turning outwards at both side ends thereof, and the hanging hook 22 with the opening facing downwards is integrally provided on the flanging 24.

[0037] Furthermore, in this embodiment, fixing holes 25 for fixedly connecting with the circuit breaker body 01 are provided at the bottom end of the fixing plate 21. When installing this installation component, screws are used to pass through the fixing holes 25 and be screwed with the screw holes on the circuit breaker body 01, thereby fixing the fixing plate 21 on the circuit breaker body 01.

[0038] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to enumerate all the implementation manners here. And these obvious changes or modifications derived from the essential spirit of the present invention still fall within the protection scope of the present invention.

Claims

1. An isolating switch closing and opening assisting device, comprising a driving shaft (1) which drives the isolating blade (2) to close and open when rotating; It is characterized in that it further comprises an elastic assisting component, one end of which is movably connected to an elbow arm (3) fixed on the driving shaft (1), and the other end of which is movably connected to a fixed bracket (10); the elastic assisting component always applies an elastic acting force to the elbow arm (3), and the elastic assisting component has a first state when the isolating blade (2) is in the open position and a second state when the isolating blade (2) is in the closed position; when the driving shaft (1) is driven by an external force to rotate, it drives the isolating blade (2) to close and open and enables the elastic assisting component to switch between the first state and the second state. When the elastic assisting component is in the first state, it forms a first V-shaped angle with the elbow arm (3), and when in the second state, it forms a second V-shaped angle with the elbow arm (3), and the openings of the first V-shaped angle and the second V-shaped angle face each other; the elastic assisting component comprises a first spring seat (4), a spring (5), a connecting rod (6), a second spring seat (7) and a rotating block (8). The rotating block (8) is rotatably installed on the fixed bracket (10). One end of the connecting rod (6) is hinged to the end of the elbow arm (3) through a connecting shaft (9), and the other end passes through a through hole (81) on the rotating block (8). The first spring seat (4) is positioned and sleeved on the connecting rod (6) at one end close to the elbow arm (3). The second spring seat (7) is movably sleeved on the connecting rod (6) at one end close to the rotating block (8). The spring (5) is sleeved on the connecting rod (6) and its two ends respectively abut against the first spring seat (4) and the second spring seat (7). Under the action of the spring (5), the second spring seat (7) abuts against the rotating block (8). When the elastic assisting component is in the first state, the first position where the connecting shaft (9) is located and when the elastic assisting component is in the second state, the second position where the connecting shaft (9) is located are respectively on both sides of the connecting line (L) between the axis of the driving shaft (1) and the axis of the rotating block (8); an external thread portion (61) is provided on the connecting rod (6), and the first spring seat (4) is screwed to the external thread portion (61).

2. The isolating switch closing and opening assisting device according to claim 1, It is characterized in that it further comprises a stop member (11) which abuts against the elbow arm (3) when the elastic assisting component is in the first state.

3. The isolating switch closing and opening assisting device according to claim 2, It is characterized in that the stop member (11) is a stop bolt, and the stop bolt is screwed and fixed on a mounting seat (12).

4. A circuit breaker, comprising a circuit breaker body (01) with an isolating switch built therein, It is characterized in that the circuit breaker body includes the isolating switch closing and opening assisting device according to any one of claims 1 to 3.

5. The circuit breaker according to claim 4, It is characterized in that An installation member (20) is provided at the top of the circuit breaker body (01), and a support mounting seat (30) is fixed at the bottom; the number of the installation members (20) is two, which are oppositely arranged on the upper part of the circuit breaker body, and each installation member includes a fixing plate (21), two hanging hooks (26) and a limiting plate (27). The fixing plate (21) is fixed on the circuit breaker body (01). The two hanging hooks (26) are arranged at intervals, the lower ends are connected to the fixing plate (21), and the upper ends are connected to the limiting plate (27). Hoisting hooks (22) are integrally formed at both side ends of the fixing plate (21). Two hanging holes (23) are arranged at intervals on the fixing plate (21), two sleeve holes (271) are correspondingly arranged on the limiting plate (27), the lower ends of the two hanging hooks (26) are in a hook shape and are hooked in the corresponding hanging holes (23), the upper ends of the two hanging hooks (26) have screw rod parts (261), and the screw rod parts (261) pass through the corresponding sleeve holes (271) and limit nuts (28) are arranged thereon.

6. The circuit breaker according to claim 5, characterized in that, A clamping member (29) is movably sleeved on each screw rod part (261) between the limit nut (28) and the limiting plate (27). The clamping member (29) has a notch for clamping with the limiting plate (27). One of the two sleeve holes (271) on each limiting plate (27) is a round hole, and the other is a slot hole with an opening on the side.

7. The circuit breaker according to claim 5 or 6, characterized in that, There are two support mounting seats (30), which are oppositely fixed on both sides of the bottom of the circuit breaker body (01).

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