Miniaturized circuit breaker switch

Abstract

The utility model discloses a miniaturized circuit breaker switch, which is characterized in that a mounting rack is mounted on a foot support, the mounting rack comprises a shaft sleeve, supporting arms and supporting legs, the supporting arms are arranged on two sides of the shaft sleeve, the supporting legs are arranged at the bottom ends of the supporting arms and mounted on the foot support, a circuit breaker hexagonal shaft penetrates through the shaft sleeve, and a closing mechanism is mounted on the circuit breaker hexagonal shaft; an isolation main shaft is rotationally installed on the loading plate, an isolation mechanism is installed in the isolation main shaft, under the cooperation of a circuit breaker hexagonal shaft and a hexagonal hole, when the circuit breaker hexagonal shaft rotates, a cam plate can be synchronously driven to rotate with the circuit breaker hexagonal shaft as the center axis, and the height of a pull rod in the vertical direction can be changed through a 90-degree corner sliding way; the cam plate plays a role in controlling the action of the pull rod, so that the operability of the on-off of the circuit is ensured, and the switching-on and switching-off accuracy of the circuit is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to switch technical field, and specifically relates to miniaturized circuit breaker switch. BACKGROUND

[0002] With the lapse of time, more and more old equipment has reached the service life in recent years, and new equipment needs to be replaced, and the old equipment that is taken off is all SF6 insulation metal-enclosed switchgear, and the new equipment that is replaced is environmentally friendly gas insulated ring network cabinet, and the difference between the two equipment is very large in floor area, and the new equipment cannot be installed on the original basis, therefore, it is very urgent to develop a compact environmentally friendly insulation ring network cabinet.

[0003] The switch is the core component of the ring network cabinet, and in addition to determining the performance and function of the ring network cabinet, also directly affects the cabinet size of the ring network cabinet.Under the premise of not changing the structure of the original environmentally friendly switch, only reducing the cabinet size will directly affect the performance of the ring network cabinet, and it cannot be verified by experiment, and the lack of miniaturized switch makes it difficult to match the size of the ring network cabinet, and the traditional clamping plate type circuit breaker switch, due to the assembly process, involves the cooperation of multiple components, and in the long-term use of the switch, it is difficult to maintain the accuracy and reliability of the cooperation of each component, resulting in failure during circuit closing and opening. SUMMARY

[0004] The utility model aims at providing miniaturized circuit breaker switch to solve the reliability of closing and opening and the problem of switch size miniaturization in prior art.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A kind of miniaturized circuit breaker switch, including two loading plates, upper beam is installed between the loading plate, horizontal beam is installed below the loading plate, the upper beam is equipped with several downward polar posts, the inside of the polar post is equipped with vacuum arc-extinguishing chamber, the upper side of the polar post is symmetrically equipped with foot prop;

[0007] The foot prop is installed with mounting bracket, and the mounting bracket includes shaft sleeve, support arm and support foot, the support arm is arranged on both sides of the shaft sleeve, the bottom end of the support arm is provided with support foot, the support foot is installed on the foot prop, the shaft sleeve is penetrated by circuit breaker hexagonal shaft, and the circuit breaker hexagonal shaft is installed with closing mechanism;Isolation spindle is rotatably installed on the loading plate, and isolation mechanism is installed in the isolation spindle.

[0008] Further, the outer side of the support arm is provided with side ear, and the side ear is installed with stabilizing block;Wherein stabilizing block 23 is bent by 90 degrees from below support foot, and the stabilizing block is slidably installed with pull rod.

[0009] Further, the closing mechanism comprises a cam plate, a hexagonal hole is formed in the cam plate and matched with the hexagonal shaft of the circuit breaker, the cam plate is positioned and connected on both sides of the mounting frame through the hexagonal hole, a slide way with a 90° corner is formed on the surface of the cam plate, and a long rod is passed through the slide way, the supporting arm and the pull rod.

[0010] Further, pulleys are installed at both ends of the long rod, and the installation positions of the pulleys are in the slide way. The addition of the pulleys at both ends of the long rod changes the movement of the long rod in the slide way from sliding friction to rolling friction, significantly reduces the friction and wear between the two, improves the movement efficiency and reliability of the closing mechanism.

[0011] Further, the isolation mechanism comprises an extension arm, a movable contact arm, a lower static contact and an upper static contact, the extension arm is arranged on the isolation main shaft, the lower static contact is installed on the cross beam, the movable contact arm is hingedly connected above the lower static contact, the movable contact arm is inside the extension arm, and the upper static contact is above the movable contact arm.

[0012] Further, the rotation of the isolation main shaft is controlled by a rotary drive mechanism or a circuit breaker connected to the side of the loading plate. The automatic and remote control improves the operation efficiency and accuracy, enhances the operation safety and reduces the risk of direct contact of the operator with the high-voltage circuit.

[0013] The technical scheme of the utility model has the following beneficial effects:

[0014] 1. When the hexagonal shaft of the circuit breaker rotates, the cam plate is driven to rotate around the hexagonal shaft of the circuit breaker, and the slide way with a 90° corner can change the height of the pull rod in the vertical direction, i.e., drive the vacuum arc-extinguishing chamber to move to change the on-off of the circuit.

[0015] 2. The electrical connection contact points at the upper and lower ends of the vacuum arc-extinguishing chamber and the pole are sealed in the epoxy resin, which can reduce the size of the switch phase and the ground, and achieve the purpose of reducing the size of the switch. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to make the technical scheme of the embodiments of the present application clearer, the following will briefly introduce the drawings needed in the embodiment description.

[0017] Figure 1 It is a schematic view of the overall structure of the present application.

[0018] Figure 2 It is a schematic view of the local structure of the present application.

[0019] Figure 3 It is a schematic view of the local structure of the present application. Figure 2 It is a schematic view of the cross section of the present application.

[0020] Figure 4 It is a schematic view of the closing mechanism of the present application.

[0021] Figure 5 It is a local view of the closing mechanism of the present application.

[0022] Reference signs: 10, loading plate; 11, upper beam; 12, cross beam; 13, pole; 14, vacuum arc-extinguishing chamber; 15, hexagonal shaft of circuit breaker; 16, isolation main shaft; 17, foot prop; 20, shaft sleeve; 201, supporting foot; 21, supporting arm; 22, side ear; 23, stabilizing block; 24, pull rod; 25, long rod; 26, pulley; 27, cam plate; 28, hexagonal hole; 29, slide way; 30, extension arm; 31, moving contact arm; 32, lower stationary contact; 33, upper stationary contact. DETAILED DESCRIPTION

[0023] In order to make the technical scheme, technical solutions and advantages of the present application clearer, the following will make a further detailed description of the present application in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0024] Embodiment one:

[0025] Reference Figure 1 and Figure 3 A small-sized circuit breaker switch, comprising two loading plates 10, an upper beam 11 is installed between the loading plates 10, a cross beam 12 is installed below the loading plates 10, a plurality of downward poles 13 are arranged on the upper beam 11, and a vacuum arc-extinguishing chamber 14 is arranged in the interior of the pole 13.

[0026] In the above scheme, the pole column 13 is equidistantly distributed on the upper beam 11, and each pole column 13 has a vacuum arc-extinguishing chamber 14. The use of the vacuum arc-extinguishing chamber 14 can quickly extinguish the arc by using the vacuum environment when the circuit breaker cuts off the current, thereby preventing the arc from continuing to occur, thereby protecting the safety of equipment and personnel; the lower end of the pole column 13 has an electrical connection contact point.

[0027] Referring to Figure 2 and Figure 5 , a foot support 17 is symmetrically arranged above the pole column 13, and a mounting bracket is mounted on the foot support 17. The mounting bracket includes a shaft sleeve 20, a support arm 21, and a support foot 201. The support arm 21 is arranged on both sides of the shaft sleeve 20. The bottom end of the support arm 21 is provided with the support foot 201, which is mounted on the foot support 17. The shaft sleeve 20 penetrates the circuit breaker hexagonal shaft 15.

[0028] In the above scheme, the support foot 201 at the bottom of the mounting bracket is fastened to the foot support 17 at the top of the pole column 13 by a nut. The circuit breaker hexagonal shaft 15 penetrates the shaft sleeve 20. The circuit breaker hexagonal shaft 15 is connected to the circuit breaker, and the rotation of the circuit breaker hexagonal shaft 15 is controlled by the circuit breaker.

[0029] Further referring to Figure 3 and Figure 5 , a side lug 22 is arranged on the outer side of the support arm 21, and a stabilizing block 23 is mounted on the side lug 22; wherein the stabilizing block 23 is bent by 90 degrees and enters from below the support foot 201. A pull rod 24 is threadedly connected above the vacuum arc-extinguishing chamber 14.

[0030] In the above scheme, the pull rod 24 is slidably mounted in the stabilizing block 23. When the pull rod 24 is slid downward, the vacuum arc-extinguishing chamber 14 is synchronously driven to slide inside the pole column 13 due to the threaded connection between the vacuum arc-extinguishing chamber 14 and the pull rod 24. That is, the bottom of the vacuum arc-extinguishing chamber 14 and the electrical connection contact point at the lower end of the pole column 13 are in contact with each other, thereby connecting the circuit. When the pull rod 24 is slid upward to drive the vacuum arc-extinguishing chamber 14 to move, the bottom of the vacuum arc-extinguishing chamber 14 is separated from the electrical connection contact point at the lower end of the pole column 13, thereby disconnecting the circuit. One end of the stabilizing block 23 is mounted on the side lug 22, and the other end is in contact with the upper end of the vacuum arc-extinguishing chamber 14. The stabilizing block 23 serves as an external conductor and an internal electrical connection of the vacuum arc-extinguishing chamber 14.

[0031] Referring to Figures 1-5 , a closing mechanism is mounted on the circuit breaker hexagonal shaft 15. The closing mechanism includes a cam plate 27. A hexagonal hole 28 is formed in the cam plate 27 and matches the circuit breaker hexagonal shaft 15. The cam plate 27 is positioned and connected on both sides of the mounting bracket through the hexagonal hole 28. A slide 29 with a 90° corner is formed on the surface of the cam plate 27. A long rod 25 penetrates the slide 29, the support arm 21, and the pull rod 24.

[0032] In the above scheme, the stable block 23 is fixed on the vacuum interrupter 14 through the pull rod 24, and the pull rod 24 is arranged on the cam plate 27. Since the long rod 25 passes through the slide 29, the support arm 21 and the pull rod 24, that is, the long rod 25 is limited in the slide 29, when the circuit breaker hexagonal shaft 15 rotates, the cam plate 27 will rotate synchronously with the circuit breaker hexagonal shaft 15 as the center axis, and the 90° corner of the slide 29 can change the height of the pull rod 24 in the vertical direction (for reference Figure 3 and Figure 4 , the current figure indicates disconnection; turn in the direction of the arrow in Figure 4 , that is, the pull rod 24 will be displaced downward, driving the vacuum interrupter 14 to move, so that the bottom of the vacuum interrupter 14 contacts the electrical connection contact point, and the circuit is connected). The cam plates 27 installed on both sides can simultaneously bear force on both sides, improving the stability of the closing mechanism, so that the long rod 25 can stably displace on the slide 29, and the cam plate 27 plays a role in controlling the action of the pull rod 24, ensuring the operability of the circuit on-off.

[0033] Further reference Figure 4 , pulleys 26 are installed at both ends of the long rod 25, and the installation positions of the pulleys 26 are in the slide 29. On the basis of the original design, the pulleys 26 are additionally provided at both ends of the long rod 25, so that the movement of the long rod 25 in the slide 29 changes from sliding friction to rolling friction, significantly reducing the friction and wear between them, improving the motion efficiency and reliability of the closing mechanism. At the same time, the introduction of the pulley 26 makes the movement of the long rod 25 in the slide 29 more stable. The pulley 26 can smoothly roll along the track of the slide 29, avoiding the jamming or shaking phenomenon caused by sliding friction, and the stable motion characteristics ensure the accuracy and stability of the closing mechanism during the action process.

[0034] Example two (based on example one, used for on-off operation of the electrical connection contact point at the lower end of the polar column 13):

[0035] Reference Figures 1-3 , the isolation main shaft 16 is rotatably installed on the loading plate 10, and the isolation mechanism is installed in the isolation main shaft 16. The isolation mechanism includes an extension arm 30, a movable contact arm 31, a lower static contact 32 and an upper static contact 33. The extension arm 30 is arranged on the isolation main shaft 16, the lower static contact 32 is installed on the cross beam 12, the movable contact arm 31 is hingedly connected above the lower static contact 32, the movable contact arm 31 is inside the extension arm 30, and the upper static contact 33 is above the movable contact arm 31.

[0036] In the above scheme, by rotating the isolation main shaft 16, since the movable contact arm 31 is inside the extension arm 30, the movable contact arm 31 will rotate synchronously (for reference Figure 3In this embodiment, the rotation of the moving contact arm 31 changes the position of the upper stationary contact 33, which is shown in the closed state in the figure; according to the rotation direction of the arrow in the figure, the upper stationary contact 33 is separated from the electrical connection contact point at the lower end of the pole 13, i.e., the circuit is disconnected.

[0037] The combined use of the closing mechanism and the isolation mechanism can disconnect the upper and lower ends of the pole 13, the physical isolation is achieved through the action of the isolation mechanism, and the stability of the circuit in the disconnected state is ensured through the cooperation of the closing mechanism, the double mechanism provides a more reliable guarantee for the safe operation of the circuit. The closing mechanism and the isolation mechanism are usually designed to be independently operated, but can also be coordinated with each other, so that when the circuit at the upper and lower ends of the pole 13 needs to be disconnected, the circuit can be disconnected through the closing mechanism first, and then the physical isolation is realized through the isolation mechanism according to the actual situation, or the two are simultaneously operated, which improves the efficiency and accuracy of the operation.

[0038] The combined use of the closing mechanism and the isolation mechanism can ensure that no excessive arc or short circuit phenomenon occurs when the circuit is disconnected, thereby protecting other parts of the system from damage.

[0039] Embodiment three (based on embodiment two, increase the driving mechanism):

[0040] Reference Figure 1 The rotation of the isolation main shaft 16 is connected to the rotating driving mechanism (such as a motor, a hydraulic or pneumatic device) or the circuit breaker on the side of the loading plate 10; automation and remote control are realized, and the efficiency and accuracy of the operation are improved. The operation safety is enhanced, and the risk of direct contact of the operator with the high-voltage circuit is reduced.

[0041] Embodiment four (combined with embodiment one):

[0042] Reference Figure 2 The pole 13 is made of ceramic material, the outer wall of the pole 13 is cast by epoxy resin, and the electrical connection contact points at the upper and lower ends of the pole 13 are sealed inside the epoxy resin.

[0043] In the above scheme, the vacuum arc-extinguishing chamber 14 and the electrical connection contact points at the upper and lower ends of the pole 13 are sealed inside the epoxy resin, which can reduce the size of the phase-to-phase and phase-to-ground, and achieve the purpose of reducing the size of the switch.

[0044] Further reference Figure 2 Figure 2 The pole 13 and the foot support 17 are integrally injection molded; the mounting frame, the circuit breaker hexagonal shaft 15, and the cam plate 27 are integrally injection molded. Integrally injection molding can ensure the strength of the structure, save assembly time, has the advantages of simple structure, uniform field strength, good insulation performance, high production efficiency, less adjustment, easy assembly, etc.

[0045] The specific implementation process of the utility model is as follows:

[0046] The circuit breaker starts: the circuit breaker hexagonal shaft 15 rotates, synchronously driving the cam plate 27 to rotate with the circuit breaker hexagonal shaft 15 as the center axis, the pull rod 24 drives the vacuum interrupter 14 to displace, so that the bottom of the vacuum interrupter 14 and the lower end of the pole 13 electrically connected contact points are in contact or away from each other, completing the opening or closing work;

[0047] The rotating isolation main shaft 16, the moving contact arm 31 is inside the extension arm 30, which will synchronously drive the moving contact arm 31 to rotate, and the rotation of the moving contact arm 31 will change the position of the upper static contact 33, so that the upper static contact 33 is separated or contacted with the electrically connected contact point at the lower end of the pole 13.

[0048] The above examples are only exemplary embodiments of the present application, and are not used to limit the present application, and the protection scope of the present application is defined by the claims. Various modifications or equivalent replacements can be made to the present application within the spirit and protection scope of the present application. Such modifications or equivalent replacements should also be considered to fall within the protection scope of the present application.

[0049] In the description of the present application, it should be explained that the terms "in", "front", "back", "left", "right" and the like indicate the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the product of the present application is used, and are only used for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, these terms indicating the orientation or positional relationship should not be understood as a limitation on the present application.

[0050] In the description of the present application, it should be further explained that, unless otherwise explicitly specified and limited. The terms "set", "connected" should be understood broadly, for example, these terms can represent the fixed connection, detachable connection or integral connection between elements; can also represent mechanical connection, electrical connection; can also mean direct connection or indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of these terms in the present application can be understood according to the specific circumstances.

Claims

1. A miniaturized circuit breaker switch, characterized by: The utility model provides a kind of vacuum interrupter, including two loading plates (10), upper beam (11) is installed between the loading plate (10), crossbeam (12) is installed below the loading plate (10), the upper beam (11) is equipped with several downward pole (13), the inside of the pole (13) is equipped with vacuum interrupter (14), the upper pole (13) is symmetrically equipped with foot prop (17), the lower end of the pole (13) has electric connection contact point; The foot prop (17) is installed with mounting bracket, and the mounting bracket includes a shaft sleeve (20), a support arm (21) and a support foot (201). The support arm (21) is arranged on both sides of the shaft sleeve (20). The bottom end of the support arm (21) is provided with the support foot (201), which is installed on the foot prop (17). The shaft sleeve (20) penetrates the circuit breaker hexagonal shaft (15). The circuit breaker hexagonal shaft (15) is installed with a closing mechanism. The loading plate (10) is rotatably installed with an isolation main shaft (16). The inside of the isolation main shaft (16) is installed with an isolation mechanism.

2. The compact circuit breaker switch of claim 1, wherein: The outer side of the support arm (21) is provided with a side lug (22), and the side lug (22) is installed with a stabilizing block (23). The stabilizing block (23) is bent by 90 degrees and enters from below the support foot (201). The upper side of the vacuum interrupter (14) is threadedly connected with a pull rod (24). The stabilizing block (23) is fixed on the vacuum interrupter (14) through the pull rod (24).

3. The compact circuit breaker switch of claim 2, wherein: The closing mechanism includes a cam plate (27). The cam plate (27) is provided with a hexagonal hole (28) matched with the circuit breaker hexagonal shaft (15). The cam plate (27) is positioned and connected on both sides of the mounting bracket through the hexagonal hole (28). The surface of the cam plate (27) is provided with a slide (29) with a 90° corner. The slide (29), the support arm (21) and the pull rod (24) penetrate a long rod (25). The pull rod (24) is arranged above the cam plate (27).

4. The compact circuit breaker switch of claim 3, wherein: The long rod (25) is installed with a pulley (26) at both ends. The installation position of the pulley (26) is in the slide (29).

5. The compact circuit breaker switch of claim 1, wherein: The isolation mechanism includes an extension arm (30), a movable contact arm (31), a lower static contact (32) and an upper static contact (33). The extension arm (30) is arranged on the isolation main shaft (16). The lower static contact (32) is installed on the crossbeam (12). The lower static contact (32) is hingedly connected with the movable contact arm (31) above. The movable contact arm (31) is in the extension arm (30). The upper static contact (33) is above the movable contact arm (31).

6. The compact circuit breaker switch of claim 5, wherein: The rotation of the isolation main shaft (16) is controlled by a rotary drive mechanism or a circuit breaker connected on the side of the loading plate (10).

7. The compact circuit breaker switch of claim 1, wherein: The pole (13) is made of ceramic material. The outer wall of the pole (13) is cast by epoxy resin. The electric connection contact points at the upper and lower ends of the pole (13) are sealed in the epoxy resin.

8. The compact circuit breaker switch of claim 7, wherein: The pole (13) and the foot prop (17) are integrally injection molded. The mounting bracket, the circuit breaker hexagonal shaft (15) and the cam plate (27) are integrally injection molded.

Images