Isolating switch with limiter
By installing a limiting mechanism inside the knife of the isolating switch, the problem of unstable limiting of the isolating switch during closing operation is solved, and a fast and stable connection between the knife and the static contact is achieved.
Patent Information
- Application Number
- CN202421571857.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-04
- Publication Date
- 2025-04-22
- Estimated Expiration
- 2034-07-04
AI Technical Summary
When the existing isolating switch is closed, it is difficult to quickly limit one end of the switch blade and the static contact, resulting in insecure connection.
A limiter isolating switch is designed, and a fast limit between one end of the switch knife and the static contact is achieved by installing a limiting mechanism inside the switch knife, including a pull ring, a support frame, an insertion rod, a limit slider, a straight rod and a spring.
Through this design, the stability of the connection between one end of the switch blade and the static contact is achieved, ensuring the reliability and speed of closing operation.
Smart Images
Figure CN222785213U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of isolating switches, and more specifically to an isolating switch with a limiter. Background Art
[0002] Isolating switch is a switching device that is mainly used for "isolating power supply, switching operation, connecting and disconnecting low current circuits" and has no arc extinguishing function. When the isolating switch is in the open position, there is an insulation distance that meets the specified requirements and an obvious disconnection mark between the contacts; when it is in the closed position, it is a switching device that can carry the current under normal circuit conditions and the current under abnormal conditions (such as short circuit) within a specified time. It is generally used as a high-voltage isolating switch, that is, an isolating switch with a rated voltage of more than 1kV. Its working principle and structure are relatively simple, but due to its large usage and high working reliability requirements, it has a great impact on the design, establishment and safe operation of substations and power plants.
[0003] At present, when the isolating switch is closed, the knife on the moving contact is usually rotated to move one end of the knife to the stationary contact, so that the moving contact and the stationary contact are connected together through the knife. However, when closing the switch, it is difficult to quickly limit the position between one end of the knife and the stationary contact, so that the connection between one end of the knife and the stationary contact is not stable enough. Utility Model Content
[0004] In order to overcome the above defects of the prior art, the utility model provides an isolating switch with a limiter to solve the problems existing in the above background technology.
[0005] The utility model provides the following technical solution: a disconnector with a limiter, comprising a base, a first ceramic support insulator is fixedly installed on the right side of the top of the base, a moving contact is fixedly installed on the top of the first ceramic support insulator, a second ceramic support insulator is fixedly installed on the left side of the top of the base, a static contact is fixedly installed on the top of the second ceramic support insulator, a knife is arranged between the moving contact and the static contact, a limiting mechanism is installed on the left side inside the knife, the limiting mechanism comprises a support frame, the support frame is fixedly installed on the left side inside the knife, a pull ring is overlapped on the left side of the top of the support frame, a plug rod is fixedly connected to the left side of the pull ring, a limiting groove is provided on the right side of the static contact, one end of the plug rod is inserted into the inside of the limiting groove, a limiting slider is fixedly connected to the middle part of the bottom of the pull ring, and the outer wall of the limiting slider is slidably connected to the inside of the support frame.
[0006] Furthermore, a straight rod is provided inside the support frame, two ends of the straight rod are fixedly connected to two sides inside the support frame, and the inner part of the limit slider is slidably sleeved on the outer wall of the straight rod.
[0007] Furthermore, a spring is movably sleeved on the outer wall of the straight rod, the left end of the spring is fixedly connected to the right side of the limit slider, and the right end of the spring is fixedly connected to the right side of the inner wall of the support frame.
[0008] Furthermore, a positioning piece is fixedly sleeved below the right side of the static contact, and the top of the positioning piece overlaps the left side of the bottom of the knife.
[0009] Furthermore, a connecting block is fixedly connected to the left side of the top surface of the moving contact, a connecting shaft is fixedly connected to the right side inside the knife, and an outer wall of the connecting shaft is rotatably connected to the inside of the connecting block.
[0010] Furthermore, the right side of the static contact is located on the left side inside the switch blade, and the left side of the moving contact is located on the right side inside the switch blade.
[0011] Technical effects and advantages of the utility model:
[0012] 1. The utility model facilitates elastic adjustment of the positions of the pull ring and the plug rod through the cooperation of the pull ring, the support frame, the plug rod, the limit slider, the straight rod and the spring. During the closing operation, the inner part of one end of the knife switch can be moved to the static contact. At this time, the pull ring and the plug rod can be driven to move by the resilience of the spring, and one end of the plug rod is inserted into the inner part of the upper limit groove of the static contact, which is convenient for quickly limiting the position between one end of the knife switch and the static contact, thereby increasing the stability of the connection between one end of the knife switch and the static contact.
[0013] 2. When the utility model performs the closing operation, the positioning piece is set to facilitate the support and limitation of the lower part of the left end of the knife, ensuring that the insertion rod of the limiting mechanism and the limiting groove on the static contact are at the same horizontal height, which is convenient for the subsequent limiting operation between one end of the knife and the static contact. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0015] Figure 2 It is a schematic cross-sectional view of the overall structure of the utility model;
[0016] Figure 3 It is a schematic diagram of the enlarged structure of point A of the utility model;
[0017] Figure 4 It is a structural schematic diagram of the knife switch, connecting shaft and limiting mechanism of the utility model;
[0018] Figure 5 It is a schematic top view of the structure of the knife switch, the limiting mechanism, the moving contact and the static contact of the utility model.
[0019] The accompanying drawings are marked as follows: 1. base; 2. first ceramic post insulator; 21. moving contact; 22. connecting block; 3. second ceramic post insulator; 31. static contact; 32. limiting groove; 33. positioning plate; 4. knife switch; 41. connecting shaft; 5. limiting mechanism; 51. pull ring; 52. support frame; 53. plug rod; 54. limiting slider; 55. straight rod; 56. spring. DETAILED DESCRIPTION
[0020] The technical solution of the present invention will be clearly and completely described below in conjunction with the drawings in the present invention. In addition, the forms of the various structures recorded in the following embodiments are merely illustrative. The isolating switch with a limiter involved in the present invention is not limited to the various structures recorded in the following embodiments. All other implementations obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.
[0021] Embodiment 1:
[0022] like Figure 1-5 As shown, a disconnector with a limiter comprises a base 1, a first ceramic post insulator 2 is fixedly mounted on the right side of the top of the base 1, a moving contact 21 is fixedly mounted on the top of the first ceramic post insulator 2, a second ceramic post insulator 3 is fixedly mounted on the left side of the top of the base 1, a static contact 31 is fixedly mounted on the top of the second ceramic post insulator 3, a knife 4 is arranged between the moving contact 21 and the static contact 31, a positioning piece 33 is fixedly sleeved below the right side of the static contact 31, the top of the positioning piece 33 overlaps the left side of the bottom of the knife 4, a connecting block 22 is fixedly connected to the left side of the top surface of the moving contact 21, a connecting shaft 41 is fixedly connected to the right side inside the knife 4, the outer wall of the connecting shaft 41 is rotatably connected to the inside of the connecting block 22, the right side of the static contact 31 is located on the left side inside the knife 4, and the left side of the moving contact 21 is located on the right side inside the knife 4.
[0023] In this embodiment, when performing closing or opening operations, the right end of the knife 4 is conveniently positioned through the setting of the connecting shaft 41 and the connecting block 22, and the right end of the knife 4 can be rotated. When closing the switch, when the inner part of the left end of the knife 4 moves onto the static contact 31, the positioning plate 33 is set to facilitate the support and limitation of the lower part of the left end of the knife 4.
[0024] Embodiment 2:
[0025] like Figure 1-5As shown, a limiting mechanism 5 is installed on the left side inside the knife switch 4, and the limiting mechanism 5 includes a support frame 52, which is fixedly installed on the left side inside the knife switch 4, a pull ring 51 is overlapped on the left side of the top of the support frame 52, and an insertion rod 53 is fixedly connected to the left side of the pull ring 51, a limiting groove 32 is provided on the right side of the static contact 31, one end of the insertion rod 53 is inserted into the inside of the limiting groove 32, and a limiting slider 54 is fixedly connected to the middle part of the bottom of the pull ring 51, and the outer wall of the limiting slider 54 is slidably connected to the inside of the support frame 52, a straight rod 55 is provided inside the support frame 52, and both ends of the straight rod 55 are fixedly connected to the two sides inside the support frame 52, the inner part of the limiting slider 54 is slidably sleeved on the outer wall of the straight rod 55, and the outer wall of the straight rod 55 is movably sleeved with a spring 56, the left end of the spring 56 is fixedly connected to the right side of the limiting slider 54, and the right end of the spring 56 is fixedly connected to the right side of the inner wall of the support frame 52.
[0026] In this embodiment, the staff can move the limit slider 54 through the pull ring 51. The limit slider 54 moves inside the support frame 52 and the outer wall of the straight rod 55, and at the same time compresses the spring 56. The pull ring 51 drives one end of the plug rod 53 to move out from the limit groove 32 on the static contact 31. At this time, the limit between the knife 4 and the static contact 31 can be released, which is convenient for subsequent opening operations. For example, when performing a closing operation, the limit slider 54, the pull ring 51 and the plug rod 53 are driven to move by the resilience of the spring 56, and one end of the plug rod 53 can be inserted into the upper limit groove 32 of the static contact 31, which is convenient for limiting one end of the knife 4 and the static contact 31, thereby completing the closing operation.
[0027] In summary, if Figure 1-5 As shown, when the isolating switch with a limiter is opened, the staff first moves the limit slider 54 through the pull ring 51, and the limit slider 54 moves inside the support frame 52 and the outer wall of the straight rod 55, and the spring 56 is compressed at the same time. When the pull ring 51 moves, it drives one end of the plug rod 53 to move out of the limit groove 32 on the static contact 31. At this time, the staff drives the limit slider 54, the straight rod 55 and the support frame 52 to move through the pull ring 51, and the support frame 52 drives the left end of the knife 4 to move upward and separate from the static contact 31. At the same time, the right end of the knife 4 drives the connecting shaft 41 to rotate inside the connecting block 22. This method is convenient for opening the switch;
[0028] If a closing operation is required, move the pull ring 51, the insert rod 53 and the limit slider 54 in the same way, compress the spring 56 through the limit slider 54, and then rotate the knife 4 in the opposite direction, so that the inner part of the left end of the knife 4 moves to the static contact 31, and use the positioning piece 33 to support and limit the lower part of the left end of the knife 4. At this time, release the pull ring 51, and the limit slider 54, the pull ring 51 and the insert rod 53 are driven to move by the resilience of the spring 56. One end of the insert rod 53 can be inserted into the upper limit groove 32 of the static contact 31, and one end of the knife 4 can be quickly limited between the static contact 31, thereby completing the closing operation.
[0029] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;
[0030] Secondly: In the drawings of the embodiments disclosed in the present utility model, only the structures related to the embodiments disclosed in the present utility model are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present utility model can be combined with each other;
[0031] Finally: The above are only preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.
Claims
1. An isolating switch with a limiter, comprising a base (1), characterized in that: A first ceramic post insulator (2) is fixedly mounted on the right side of the top of the base (1), a moving contact (21) is fixedly mounted on the top of the first ceramic post insulator (2), a second ceramic post insulator (3) is fixedly mounted on the left side of the top of the base (1), a stationary contact (31) is fixedly mounted on the top of the second ceramic post insulator (3), a knife switch (4) is provided between the moving contact (21) and the stationary contact (31), a limiting mechanism (5) is installed on the left side inside the knife switch (4), and the limiting mechanism (5) comprises A support frame (52), the support frame (52) is fixedly installed on the left side inside the switch (4), a pull ring (51) is overlapped on the left side of the top of the support frame (52), an insertion rod (53) is fixedly connected to the left side of the pull ring (51), a limiting groove (32) is provided on the right side of the static contact (31), one end of the insertion rod (53) is inserted into the inside of the limiting groove (32), a limiting slider (54) is fixedly connected to the middle part of the bottom of the pull ring (51), and the outer wall of the limiting slider (54) is slidably connected to the inside of the support frame (52).
2. The isolating switch with limiter according to claim 1, characterized in that: A straight rod (55) is provided inside the support frame (52), and two ends of the straight rod (55) are fixedly connected to two sides inside the support frame (52), and the inner part of the limiting slider (54) is slidably sleeved on the outer wall of the straight rod (55).
3. The isolating switch with limiter according to claim 2, characterized in that: A spring (56) is movably sleeved on the outer wall of the straight rod (55), the left end of the spring (56) is fixedly connected to the right side of the limiting slider (54), and the right end of the spring (56) is fixedly connected to the right side of the inner wall of the support frame (52).
4. The isolating switch with limiter according to claim 1, characterized in that: A positioning piece (33) is fixedly sleeved below the right side of the static contact (31), and the top of the positioning piece (33) overlaps the left side of the bottom of the knife switch (4).
5. The isolating switch with limiter according to claim 1, characterized in that: A connecting block (22) is fixedly connected to the left side of the top surface of the moving contact (21), a connecting shaft (41) is fixedly connected to the right side inside the knife switch (4), and an outer wall of the connecting shaft (41) is rotatably connected to the inside of the connecting block (22).
6. The isolating switch with limiter according to claim 1, characterized in that: The right side of the stationary contact (31) is located on the left side inside the switch blade (4), and the left side of the moving contact (21) is located on the right side inside the switch blade (4).