Isolating switch for medium-voltage switch cabinet

Abstract

The utility model discloses an isolating switch for a medium-voltage switch cabinet, which belongs to the field of isolating switches and comprises a base frame, a plurality of first ceramic pillars are fixedly mounted on one side of the top of the base frame, and a plurality of second ceramic pillars are fixedly mounted on the other side of the top of the base frame. The top of the first ceramic supporting column and the top of the second ceramic supporting column are provided with a moving contact and a static contact respectively, the top of the static contact is rotationally connected with a contact rod through a bolt, one end of the contact rod makes contact with the top of the corresponding moving contact, and the base frame is provided with an opening and closing mechanism and a locking mechanism. The limiting gear is directly mounted on the rotating shaft for driving the opening and closing mechanism to open and close, so that the clamping hook can directly clamp the limiting gear when locking is executed, normal rotation of the rotating shaft is hindered, the locking process is simple, and the situation that the rotating shaft can be locked only after a series of connecting rod mechanisms in a cabinet body of the medium-voltage switch cabinet are locked is avoided; and the use reliability of the locking mechanism is improved.

Description

Technical Field

[0001] The utility model relates to the field of isolating switches, and more specifically to an isolating switch used for a medium-voltage switch cabinet. Background Art

[0002] The main components of the switchgear include circuit breakers, disconnectors, load switches, operating mechanisms, transformers and various protective devices. According to the different voltages used, it can be roughly divided into high-voltage switchgear, medium-voltage switchgear and low-voltage switchgear.

[0003] The disconnector of the medium voltage switch cabinet is usually provided with an opening and closing mechanism to control the opening and closing of the contact rod and the moving contact on the disconnector, and the opening and closing mechanism is generally provided with a corresponding locking mechanism to lock the opening and closing process to reduce the risk of misoperation. However, the existing locking mechanism is relatively complex, and the locking part is not directly locked to the rotating shaft that drives the opening and closing mechanism to open and close, and the reliability is low, so we propose an isolating switch for medium voltage switch cabinet to solve the above problems. Utility Model Content

[0004] 1. Technical issues to be solved

[0005] In view of the problems existing in the prior art, the purpose of the utility model is to provide an isolating switch for a medium-voltage switch cabinet, which directly installs the limit gear on the rotating shaft that drives the opening and closing mechanism through a locking mechanism, so that the hook can directly clamp the limit gear when locking, thereby hindering the normal rotation of the rotating shaft. The locking process is simple, and it is avoided that the rotating shaft can only be locked after a series of connecting rod mechanisms inside the cabinet of the medium-voltage switch cabinet are locked, thereby improving the reliability of the locking mechanism when in use.

[0006] 2. Technical solution

[0007] To solve the above problems, the utility model adopts the following technical solutions.

[0008] A disconnector for a medium-voltage switch cabinet, comprising a base frame, a plurality of ceramic pillars 1 are fixedly mounted on one side of the top of the base frame, a plurality of ceramic pillars 2 are fixedly mounted on the other side of the top of the base frame at positions corresponding to the plurality of ceramic pillars 1, and a moving contact and a stationary contact are respectively arranged on the top of the ceramic pillars 1 and 2, a contact rod is rotatably connected to the top of the stationary contact by bolts, one end of the contact rod contacts the corresponding top of the moving contact, and an opening and closing mechanism and a locking mechanism are arranged on the base frame;

[0009] The opening and closing mechanism includes a rotating shaft rotatably connected to the base frame, and a plurality of ceramic pillars 3 are arranged on the rotating shaft corresponding to the positions of the plurality of ceramic pillars 1. The locking mechanism includes a limiting gear fixedly sleeved on the rotating shaft, a hook is engaged at the top of the limiting gear, and an L-shaped angle piece is arranged on one side of the hook.

[0010] Furthermore, the tops and bottoms of several of the ceramic pillars are fixedly connected with upper connecting ends and lower connecting ends respectively, the tops of the upper connecting ends are rotatably connected with the corresponding bottoms of the contact rods, and the bottoms of the lower connecting ends are rotatably connected with ears, and one end of the ears is fixedly welded to one side of the outer wall of the rotating shaft.

[0011] Furthermore, a positioning piece is rotatably connected to one side of the hook, and the bottom of the positioning piece is fixedly welded to the top of the base frame.

[0012] Furthermore, the top of the L-shaped angle piece and one end of the hook are rotatably connected via a connecting piece, and a clamping ring 1 is fixedly welded on the hook, and a clamping ring 2 is fixedly welded on the bottom of the base frame, and the clamping ring 1 and the clamping ring 2 are connected via a tension spring.

[0013] Furthermore, a pry bar is fixedly welded to the bottom of the L-shaped angle piece, and one end of the pry bar passes through one side of the bottom of the L-shaped angle piece, and one end of the pry bar is rotatably connected to one side of the base frame.

[0014] 3. Beneficial effects

[0015] Compared with the prior art, the advantages of the present invention are:

[0016] In this solution, a locking mechanism is set up to directly install the limit gear on the rotating shaft that drives the opening and closing mechanism to open and close, so that the hook can directly clamp the limit gear when locking, thereby hindering the normal rotation of the rotating shaft. The locking process is simple, and it is avoided that the rotating shaft can only be locked after a series of connecting rod mechanisms inside the cabinet of the medium-voltage switchgear, thereby improving the reliability of the locking mechanism when in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 For the utility model Figure 1 A schematic diagram of the partially enlarged structure;

[0019] Figure 3 For the utility model Figure 2 Enlarged structural diagram of point A in the middle

[0020] Figure 4 It is a schematic diagram of the disassembled structure of the locking mechanism of the utility model.

[0021] Description of the numbers in the figure:

[0022] 1. Base frame; 2. Ceramic pillar one; 201. Moving contact; 3. Ceramic pillar two; 301. Static contact; 4. Contact rod; 5. Opening and closing mechanism; 501. Rotating shaft; 502. Ceramic pillar three; 503. Ear piece; 6. Locking mechanism; 601. Limiting gear; 602. Hook; 603. L-shaped angle piece; 604. Positioning piece; 605. Connecting piece; 606. Clamp ring one; 607. Clamp ring two; 608. Tension spring; 609. Pry bar. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention specification; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field without creative work based on the embodiments of the present invention are within the scope of protection of the present invention.

[0024] Embodiment 1:

[0025] See also Figure 1-Figure 4 , a disconnector for a medium voltage switch cabinet, comprising a base frame 1, a plurality of ceramic pillars 1 2 are fixedly mounted on one side of the top of the base frame 1, a plurality of ceramic pillars 2 3 are fixedly mounted on the other side of the top of the base frame 1 at positions corresponding to the plurality of ceramic pillars 1 2, and a moving contact 201 and a stationary contact 301 are respectively arranged on the top of the ceramic pillars 1 2 and the ceramic pillars 2 3, a contact rod 4 is rotatably connected to the top of the stationary contact 301 by bolts, one end of the contact rod 4 contacts with the top of the corresponding moving contact 201, and an opening and closing mechanism 5 and a locking mechanism 6 are arranged on the base frame 1;

[0026] The opening and closing mechanism 5 includes a rotating shaft 501 rotatably connected to the base frame 1, and a plurality of ceramic pillars 3 502 are arranged on the rotating shaft 501 at the positions corresponding to the plurality of ceramic pillars 1 2. The tops and bottoms of the plurality of ceramic pillars 3 502 are respectively fixedly connected with upper connecting ends and lower connecting ends. The tops of the upper connecting ends are respectively rotatably connected to the bottoms of the corresponding contact rods 4, and the bottoms of the lower connecting ends are all rotatably connected with ear pieces 503, and one end of the ear pieces 503 is fixedly welded to one side of the outer wall of the rotating shaft 501.

[0027] The opening and closing process of the contact rod of the isolating switch of this medium-voltage switchgear is as follows:

[0028] First, the isolating switch of the medium-voltage switch cabinet is installed inside the cabinet of the medium-voltage switch cabinet, and the corresponding transmission line is connected through the moving contact 201 and the static contact 301. When the closing action is required, the rotating shaft 501 on the opening and closing mechanism 5 is rotated to drive the plurality of ear pieces 503 to deflect downward, thereby pulling the ceramic support three 502 connected to the plurality of ear pieces 503 downward, and causing the contact rod 4 connected to the top of the plurality of ceramic support three 502 to move downward until one end of the contact rod 4 is engaged with the moving contact 201, and the closing action of the isolating switch is completed at this time; when the opening action is required, it is only necessary to rotate the rotating shaft 501 in the opposite direction to cause one end of the contact rod 4 to disengage from the engagement contact with the moving contact 201.

[0029] Embodiment 2:

[0030] In view of the above embodiment 1, for further description, refer to Figure 2 and Figure 3 The locking mechanism 6 includes a limit gear 601 fixedly sleeved on the rotating shaft 501, a hook 602 meshing on the top of the limit gear 601, and an L-shaped angle piece 603 is arranged on one side of the hook 602, a positioning piece 604 is rotatably connected to one side of the hook 602, and the bottom of the positioning piece 604 is fixedly welded to the top of the base frame 1, the top of the L-shaped angle piece 603 and one end of the hook 602 are rotatably connected through a connecting piece 605, and a clamp ring 1 606 is fixedly welded on the hook 602, a clamp ring 2 607 is fixedly welded on the bottom of the base frame 1, and the clamp ring 1 606 and the clamp ring 2 607 are connected by a tension spring 608, and a pry bar 609 is fixedly welded to the bottom of the L-shaped angle piece 603, and one end of the pry bar 609 passes through one side of the bottom of the L-shaped angle piece 603, and one end of the pry bar 609 is rotatably connected to one side of the base frame 1.

[0031] During the above-mentioned closing and opening process, the locking mechanism 6 should be used to unlock the door first, that is, the pry bar 609 needs to be rotated first to drive the L-shaped angle piece 603 to deflect, so that the top of the L-shaped angle piece 603 pulls the hook 602 through the connecting piece 605, causing the hook 602 to disengage from the top of the limit gear 601. At this time, the limit gear 601 fixedly connected to the rotating shaft 501 can be disengaged from the limit, and then the rotating shaft 501 can be rotated. After the rotation of the rotating shaft 501 is completed, the rotation of the pry bar 609 is released, and then the tension spring 608 can pull the hook 602 to limit the limit on the limit gear 601, thereby locking the rotating shaft 501. At the same time, the L-shaped angle piece 603 and the pry bar 609 are reset.

[0032] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. A disconnector for a medium voltage switch cabinet, comprising a base frame (1), characterized in that: A plurality of ceramic pillars (2) are fixedly mounted on one side of the top of the base frame (1), and a plurality of ceramic pillars (3) are fixedly mounted on the other side of the top of the base frame (1) at positions corresponding to the plurality of ceramic pillars (2), and a moving contact (201) and a stationary contact (301) are respectively arranged on the top of the ceramic pillars (2) and the ceramic pillars (3), and a contact rod (4) is rotatably connected to the top of the stationary contact (301) by means of bolts, and one end of the contact rod (4) is in contact with the top of the corresponding moving contact (201), and an opening and closing mechanism (5) and a locking mechanism (6) are arranged on the base frame (1); The opening and closing mechanism (5) comprises a rotating shaft (501) rotatably connected to the base frame (1), and a plurality of ceramic pillars (502) are arranged on the rotating shaft (501) at positions corresponding to the plurality of ceramic pillars (2). The locking mechanism (6) comprises a limit gear (601) fixedly sleeved on the rotating shaft (501), a hook (602) is meshed at the top of the limit gear (601), and an L-shaped angle piece (603) is arranged on one side of the hook (602).

2. The isolating switch for medium voltage switchgear according to claim 1, characterized in that: The tops and bottoms of a plurality of the ceramic pillars (502) are fixedly connected to upper connecting ends and lower connecting ends respectively, the tops of the upper connecting ends are rotatably connected to the bottoms of the corresponding contact rods (4), and the bottoms of the lower connecting ends are rotatably connected to ear pieces (503), and one end of the ear piece (503) is fixedly welded to one side of the outer wall of the rotating shaft (501).

3. The isolating switch for medium voltage switchgear according to claim 1, characterized in that: One side of the hook (602) is rotatably connected to a positioning piece (604), and the bottom of the positioning piece (604) is fixedly welded to the top of the base frame (1).

4. The isolating switch for medium voltage switchgear according to claim 1, characterized in that: The top of the L-shaped angle piece (603) and one end of the hook (602) are rotatably connected via a connecting piece (605), and a first clamping ring (606) is fixedly welded on the hook (602), and a second clamping ring (607) is fixedly welded on the bottom of the base frame (1), and the first clamping ring (606) and the second clamping ring (607) are connected via a tension spring (608).

5. The isolating switch for medium voltage switch cabinet according to claim 1, characterized in that: A pry bar (609) is fixedly welded to the bottom of the L-shaped angle piece (603), and one end of the pry bar (609) passes through one side of the bottom of the L-shaped angle piece (603), and one end of the pry bar (609) is rotatably connected to one side of the base frame (1).

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