Valve drive mechanism, valve mechanism and switch cabinet for trolley-type circuit breaker

Abstract

The utility model provides a valve driving mechanism, a valve mechanism and a switch cabinet for a trolley-type circuit breaker. The switch cabinet comprises a contact box, the contact box comprises a positioning plate and a box body corresponding to each phase, the box body is fixed to the positioning plate, the valve driving mechanism comprises a driving assembly corresponding to one valve, the edge of the positioning plate is provided with a slide groove, the driving assembly comprises: a sliding bracket, which is used to be fixed to the valve, and the sliding bracket is used to be movably arranged on the positioning plate and can slide along the slide groove, the sliding bracket can move between a first position and a second position, when the sliding bracket is located at the first position, the valve is in a closed state, and when the sliding bracket is located at the second position, the valve is in an open state; a driving rod, which is rotatably connected to the sliding bracket, and the driving rod can be rotated to drive the sliding bracket to slide.

Description

Technical Field

[0001] The utility model relates to the field of switch cabinets, in particular to a valve driving mechanism, a valve mechanism and a switch cabinet for a trolley type circuit breaker. Background Art

[0002] In the center-mounted switch cabinet, there is generally a trolley-type circuit breaker. The circuit breaker is located on the trolley. One end of the contact arm of the circuit breaker is equipped with a moving contact. The movement of the trolley will move the circuit breaker to the working position, so that the static contact in the contact box can contact the moving contact. The safety protection device after the trolley is pulled out of the working position, the valve is already a standard configuration. Its function is to shield the charged static contact inside the cabinet and provide safety protection when the trolley-type circuit breaker is not installed, to prevent external operators from contacting the charged static contact and causing a safety electric shock accident. The valves are usually arranged in pairs and controlled by a valve drive mechanism. The current valve drive mechanism has two metal slide bars, which are respectively arranged on the left and right sides of the contact box. The upper valve and the lower valve are pushed by the drive rod and slide on the metal slide bar so that the upper valve and the lower valve are opened or closed at the same time. The metal slide bar is fixed on both sides of the contact box. Whether the upper valve and the lower valve are in the open position or in the closed position, the position of the metal slide bar remains unchanged.

[0003] When the circuit breaker is pushed into the working position, the distance between the contact arm of the circuit breaker and the metal slide bar is relatively close, which is not conducive to avoiding the generation of discharge. Utility Model Content

[0004] In view of this, the utility model proposes a valve driving mechanism for a switch cabinet, the switch cabinet includes a contact box, the contact box includes a positioning plate and a box body corresponding to each phase, the box body is fixed to the positioning plate, the valve driving mechanism includes a driving component corresponding to one valve, the edge of the positioning plate has a slide groove, and the driving component includes:

[0005] A sliding bracket, which is used to be fixed to the valve, and the sliding bracket is used to be movably arranged on the positioning plate and can slide along the sliding groove, and the sliding bracket can move between a first position and a second position. When the sliding bracket is located at the first position, the valve is in a closed state, and when the sliding bracket is located at the second position, the valve is in an open state;

[0006] A driving rod is rotatably connected to the sliding bracket, and the driving rod can be rotated to drive the sliding bracket to slide.

[0007] Since the slide groove is arranged at the edge of the positioning plate, and a sliding bracket is used to slide in the slide groove to drive the opening and closing of the valve, not only can the normal energy supply of the valve be achieved, but also the slide groove can be kept away from the contact arm as far as possible to ensure that the distance between the slide groove and the contact arm reaches a safe insulation distance.

[0008] According to the valve driving mechanism as described above, optionally, the driving assembly further comprises: a guide plate, which is used to be adjacent to the positioning plate and located at the target side of the positioning plate, the target side being the side where the sliding bracket moves toward the second position, and the sliding bracket can slide along the slide groove to the guide plate and slide along the guide plate. The guide plate is used to extend the sliding length of the sliding bracket, and its structure is simple and the cost is low.

[0009] According to the valve driving mechanism as described above, optionally, the sliding bracket includes:

[0010] A U-shaped guide rail, which is slidably disposed on the positioning plate and can slide in the slide groove;

[0011] The driving plate is fixed to the U-shaped guide rail, and the driving rod is rotatably connected to the driving plate.

[0012] Such a combined structure is relatively simple and is easy to disassemble and maintain.

[0013] According to the valve driving mechanism as described above, optionally, the sliding bracket further comprises: at least one protrusion, which is fixed to one end of the U-shaped guide rail and smoothly transitions with the U-shaped guide rail. In this way, during the sliding process, since there is a smooth transition between the U-shaped guide rail and the protrusion, it is possible to prevent the edge of the sliding bracket from scratching the positioning plate.

[0014] According to the valve driving mechanism as described above, optionally, when the sliding bracket is in the first position, the protrusion can abut against the protrusion of another sliding bracket, and the other sliding bracket corresponds to another valve. This can prevent the valve from staying in an inappropriate position, thereby allowing the valve to completely cover the box body.

[0015] According to the valve driving mechanism as described above, optionally, the slide slot is located on the same side of the positioning plate as the box body.

[0016] According to the valve driving mechanism as described above, optionally, the driving assembly has two groups, which are respectively arranged on both sides of the valve. In this way, the valve is subjected to balanced force during the driving process.

[0017] The utility model also provides a valve mechanism, comprising:

[0018] First valve;

[0019] Second valve;

[0020] The valve driving mechanism corresponding to the first valve as described in any of the above items;

[0021] The valve driving mechanism corresponding to the second valve as described in any of the preceding items.

[0022] The utility model further provides a switch cabinet, comprising the valve mechanism as described in any one of the above items. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so that those skilled in the art will be more aware of the above and other features and advantages of the present invention. In the accompanying drawings:

[0024] Figure 1 It is a schematic structural diagram of a valve when it is closed according to an embodiment of the utility model.

[0025] Figure 2 It is a schematic structural diagram of a valve when it is opened according to an embodiment of the utility model.

[0026] Figure 3 It is a structural schematic diagram of a sliding bracket located at a first position according to an embodiment of the utility model;

[0027] Figure 4 It is a structural schematic diagram of another angle when the valve is closed according to an embodiment of the utility model.

[0028] The reference numerals are as follows:

[0029] 11-Positioning plate

[0030] 111-Chute

[0031] 12-Box

[0032] 121-Contact arm hole

[0033] 21-First valve

[0034] 22-Second valve

[0035] 3-Sliding bracket

[0036] 31-U-type guide rail

[0037] 32-Driver board

[0038] 33-Protrusion

[0039] 4-Drive rod

[0040] 5-Guide plate

[0041] 6-Side wall

[0042] 7-Frame board

[0043] 71-Track DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail with reference to the following embodiments. The nouns and pronouns related to people in this patent application are not limited to specific genders.

[0045] The switch cabinet generally has a trolley room, a busbar room and a contact box. The trolley room is generally provided with a trolley-type circuit breaker, which includes a trolley and a circuit breaker located on the trolley. The circuit breaker has a contact arm and a moving contact arranged on the contact arm. The trolley can carry the circuit breaker out of the switch cabinet for maintenance, or it can carry the circuit breaker into the switch cabinet to reach the test position and the working position respectively. The contact box includes a positioning plate and a box body corresponding to each phase, wherein the positioning plate is arranged on the side wall of the trolley room, and the box body extends toward the busbar room of the switch cabinet. A static contact will be arranged in the box body, and the contact arm of the circuit breaker will extend into the box body from the contact arm hole on the box body so that the moving contact is connected to the static contact.

[0046] The utility model provides a valve mechanism for a trolley type circuit breaker. The valve mechanism comprises a valve and a valve driving mechanism. The valve driving mechanism is used for driving the valve to open and close.

[0047] As an example, Figure 1 and Figure 2 As shown, there are two valves, which are respectively referred to as the first valve 21 and the second valve 22 for the convenience of description. The first valve 21 is used to shield the box body 12 of the upper three phases, and the second valve 22 is used to shield the box body 12 of the lower three phases. Figure 1 As shown in the figure, it shows the state when the first valve 21 and the second valve 22 are closed. When the trolley moves the circuit breaker to the working position, the first valve 21 and the second valve 22 are both opened to expose the static contact (not shown in the figure) in the box body 12, so that the moving contact (not shown in the figure) of the circuit breaker can be connected with the static contact. Figure 2 As shown, it shows the situation where the first valve 21 and the second valve 22 are both open. Figure 1 and Figure 2 Schematic diagrams of the valve mechanism viewed from two directions are shown.

[0048] The valve driving mechanism of the utility model includes a driving assembly, one driving assembly corresponds to one valve, and one valve can correspond to two driving assemblies, which are respectively arranged on both sides of the valve, so that the valve is balanced in force during the driving process. Generally, the two valves will use the same driving assembly, of course, it is not ruled out that the driving assemblies of the two valves are different. The utility model is described by taking the first valve 21 and the second valve 22 as an example that both use the same driving assembly.

[0049] like Figure 1 and Figure 2 As shown, the edge of the positioning plate 11 has a slide groove 111. Figures 1 to 4 As shown, the driving assembly includes a sliding bracket 3 and a driving rod 4. The sliding bracket 3 is used to be fixed to the valve, and the sliding bracket 3 is used to be movably arranged on the positioning plate 11 and can slide along the sliding groove 111. The sliding bracket 3 can move between a first position and a second position. Figure 1 As shown, when the sliding bracket 3 is in the first position, the valve is in a closed state. Figure 2 As shown, when the sliding bracket 3 is in the second position, the valve is in an open state. The sliding of the sliding bracket 3 can open or close the valve. The driving rod 4 is rotatably connected to the sliding bracket 3, and the driving rod 4 can be rotated to drive the sliding bracket 3 to slide. More specifically, both edges of the positioning plate 11 can have a slide groove 111, that is, a driving component is respectively provided on both sides of the positioning plate 11, that is, a driving component is provided on both sides of a valve, that is, a driving component is provided on both sides of a valve, which can facilitate the smooth opening and closing of the valve. Accordingly, as Figure 1 and Figure 2 As shown, there are four drive assemblies, two of which are arranged on both sides of the first valve 21 , and the other two are arranged on both sides of the second valve 22 .

[0050] The slide groove 111 here can be realized by removing part of the positioning plate 11 at the edge of the positioning plate 11, and of course, it can also be realized in other ways, which will not be repeated here. Optionally, the slide groove 111 can be located on the same side of the positioning plate 11 as the box body 12. Figure 1 and Figure 2 It can be seen that the slide groove 111 is on the same side as the box body 12, and the side of the positioning plate 11 away from the box body 12 is covered with reinforcing ribs. Therefore, setting the slide groove 111 on the same side as the box body 12 can avoid affecting the setting of the reinforcing ribs.

[0051] In the utility model, since the slide groove 111 is set at the edge of the positioning plate 11, and the sliding bracket 3 is used to slide in the slide groove 111 to drive the opening and closing of the valve, not only can the normal energy supply of the valve be achieved, but also the slide groove 111 can be as far away from the contact arm as possible to ensure that the distance between the slide groove 111 and the contact arm reaches a safe insulation distance.

[0052] As an exemplary illustration, the driving assembly further includes a guide plate 5, which is used to be adjacent to the positioning plate 11 and located on the target side of the positioning plate 11, the target side being the side where the sliding bracket 3 moves toward the second position, and the sliding bracket 3 can slide along the slide groove 111 to the guide plate 5 and slide along the guide plate 5. Figures 1 to 3 As shown, each driving assembly has a guide plate 5. For the driving assembly corresponding to the first valve 21, the guide plate 5 is located above the positioning plate 11 and adjacent to the positioning plate 11. For the driving assembly corresponding to the second valve 22, the guide plate 5 is located below the positioning plate 11 and adjacent to the positioning plate 11. Figure 1 and Figure 2 As shown. The function of the guide plate 5 is equivalent to increasing the sliding length of the sliding bracket 3, so that the sliding bracket 3 can drive the valve to the first position. The guide plate 5 is used to extend the sliding length of the sliding bracket 3, and its structure is simple and the cost is low. As an example, the guide plate 5 can be fixed on the side wall 6 of the trolley room or on the adjacent column (not shown in the figure) by screws, and the specific details are not limited.

[0053] As an example, Figures 1 to 4 As shown, the sliding bracket 3 includes a U-shaped guide rail 31 and a driving plate 32, wherein the U-shaped guide rail 31 is used to be slidably arranged on the positioning plate 11 and can slide in the slide groove 111; the driving plate 32 is fixed to the U-shaped guide rail 31, and the driving rod 4 is rotatably connected to the driving plate 32. Figure 1 and Figure 2 As shown, the U-shaped guide rail 31 wraps around the edge of the positioning plate 11 for sliding, and the U-shaped guide rail 31 is used to achieve sliding, which has a simple structure and low cost. The drive plate 32 can be fixed to the U-shaped guide rail 31 by screws. Such a combined structure is relatively simple, easy to disassemble, and easy to maintain. More specifically, the valve is fixed between the U-shaped guide rail 31 and the drive plate 32. Such a fixing method has a simple structure and is easy to assemble. As an example, after the U-shaped guide rail 31 is assembled to the positioning plate 11, it can slide along the slide groove 111 without being separated from the positioning plate 11, and the U-shaped guide rail 31 can also be prevented from being separated from the slide groove 111 under the action of surrounding components. For example, the valve is fixed between the two U-shaped guide rails 31, and the effect of the valve also makes the U-shaped guide rail 31 unable to be separated from the slide groove 111 in the first direction. In the second direction, the frame of the switch cabinet can be used to block the movement of the U-shaped guide rail 31 in the second direction.

[0054] As an exemplary illustration, the sliding bracket 3 further includes at least one protrusion 33 , which is fixed to one end of the U-shaped guide rail 31 and smoothly transitions to the U-shaped guide rail 31 . Figures 1 to 3FIG. 2 shows a case where a protrusion 33 is provided at each end of a sliding bracket 3. In this way, during the sliding process, since there is a smooth transition between the U-shaped guide rail 31 and the protrusion 33, it is possible to prevent the edge of the sliding bracket 3 from scratching the positioning plate 11. The protrusion 33 can be integrally formed with the U-shaped guide rail 31, for example, by injection molding of a metal material. Optionally, when the sliding bracket 3 is in the first position, the protrusion 33 can abut against the protrusion 33 of another sliding bracket 3, and the other sliding bracket 3 corresponds to another valve, as shown in FIG. Figure 1 The protrusion 33 can also play a positioning role, that is, to limit the sliding bracket 3 in the third direction to prevent the valve from staying in an inappropriate position, thereby allowing the valve to completely cover the box body 12.

[0055] The working process of the valve driving mechanism is described below by using specific examples. For ease of description, the two valves are respectively referred to as the first valve 21 and the second valve 22, wherein the first valve 21 can block the upper three-phase box body 12, and the second valve 22 can block the lower three-phase box body 12.

[0056] When the circuit breaker trolley is not pushed into the switch cabinet, for example, when the circuit breaker trolley is in the maintenance position, Figure 1 and Figure 4 As shown, the first valve 21 and the second valve 22 are both in a closed state, and the sliding bracket 3 is in the first position. When the circuit breaker trolley is pushed into the switch cabinet along the track 71 on the frame plate 7, the driving plate 32 on the trolley will drive the driving rod 4 to rotate. How the driving plate 32 of the trolley drives the driving rod 4 to rotate belongs to the prior art and will not be repeated here. The rotation of the driving rod 4 will drive the sliding bracket 3 to move. The rotation of the driving rod 4 corresponding to the first valve 21 will drive the sliding bracket 3 to move in the third direction to expose the upper three-phase box body 12. The rotation of the driving rod 4 corresponding to the second valve 22 will drive the sliding bracket 3 to move in the opposite direction of the third direction to expose the lower three-phase box body 12. Figure 1 As shown by the arrow on the valve. After the first valve 21 and the second valve 22 are opened, the sliding bracket 3 is located in the second position, as shown in FIG. Figure 2 At this time, the moving contact of the circuit breaker can come into contact with the stationary contact in the box body 12.

[0057] If the circuit breaker trolley needs to be moved out of the switch cabinet, the circuit breaker trolley moves out of the switch cabinet along the track 71 on the frame plate 7, and the driving plate 32 on the trolley drives the driving rod 4 to rotate, thereby driving the sliding bracket 3 to move from the second position to the first position. Accordingly, the first valve 21 moves in the opposite direction to the third direction, and the second valve 22 moves in the third direction. Figure 2As shown by the arrow on the valve in FIG. The protrusion on the sliding bracket 3 then contacts, thereby hindering the continued movement of the first valve 21 and the second valve 22, so that the first valve 21 and the second valve 22 stop at a proper position.

[0058] The utility model also includes a valve mechanism, which includes a first valve 21, a second valve 22, a valve driving mechanism corresponding to any of the above-mentioned embodiments of the first valve 21, and a valve driving mechanism corresponding to any of the above-mentioned embodiments of the second valve 22.

[0059] The utility model also comprises a switch cabinet, which comprises the valve driving mechanism of any of the above-mentioned embodiments.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A valve drive mechanism for a trolley-type circuit breaker, wherein the switch cabinet comprises a contact box, wherein the contact box comprises a positioning plate (11) and a box body (12) corresponding to each phase, wherein the box body (12) is fixed to the positioning plate (11), and the valve drive mechanism comprises a drive assembly corresponding to one valve, wherein: The edge of the positioning plate (11) is provided with a slide groove (111), and the driving assembly comprises: a sliding bracket (3) for fixing to the valve, and the sliding bracket (3) is used to be movably arranged on the positioning plate (11) and can slide along the sliding groove (111), and the sliding bracket (3) can move between a first position and a second position, and when the sliding bracket (3) is located at the first position, the valve is in a closed state, and when the sliding bracket (3) is located at the second position, the valve is in an open state; A driving rod (4) is rotatably connected to the sliding bracket (3), and the driving rod (4) can be rotated to drive the sliding bracket (3) to slide.

2. The valve drive mechanism according to claim 1, characterized in that: The drive assembly also includes: A guide plate (5) is used to be adjacent to the positioning plate (11) and located on the target side of the positioning plate (11), the target side being the side on which the sliding bracket (3) moves toward the second position, and the sliding bracket (3) can slide along the sliding groove (111) to the guide plate (5) and can slide along the guide plate (5).

3. The valve drive mechanism according to claim 1, characterized in that: The sliding bracket (3) comprises: A U-shaped guide rail (31) which is slidably disposed on the positioning plate (11) and is capable of sliding in the slide groove (111); A driving plate (32) is fixed to the U-shaped guide rail (31), and the driving rod (4) is rotatably connected to the driving plate (32).

4. The valve drive mechanism according to claim 3, characterized in that: The sliding bracket (3) further comprises: At least one protrusion (33) is fixed to one end of the U-shaped guide rail (31) and forms a smooth transition with the U-shaped guide rail (31).

5. The valve drive mechanism according to claim 4, characterized in that: When the sliding bracket (3) is located at the first position, the protrusion (33) can abut against the protrusion (33) of another sliding bracket (3), and the other sliding bracket (3) corresponds to another valve.

6. The valve drive mechanism according to claim 1, characterized in that: The sliding groove (111) is located on the same side of the positioning plate (11) as the box body (12).

7. The valve drive mechanism according to any one of claims 1 to 6, characterized in that: The driving assembly has two groups, which are respectively arranged on both sides of the valve.

8. A valve mechanism for a trolley-type circuit breaker, characterized in that: include: A first valve (21); A second valve (22); The valve driving mechanism for a trolley-type circuit breaker corresponding to the first valve (21) according to any one of claims 1 to 7; A valve driving mechanism for a trolley-type circuit breaker corresponding to the second valve (22) as described in any one of claims 1 to 7.

9. A switch cabinet, characterized in that: The invention comprises a valve driving mechanism for a trolley-type circuit breaker according to any one of claims 1 to 7.

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