Blade synchronous linkage type three-station isolating switch

Abstract

The utility model relates to the technical field of electrical switches, and provides a blade synchronous linkage type three-station isolating switch, which comprises an operating mechanism and a station switching mechanism, the operating mechanism is connected with the station switching mechanism through the transmission assembly. The station switching mechanism comprises three groups of switch assemblies; the switch assembly comprises a disconnecting link piece, a switching-on contact and a grounding contact; the disconnecting link piece comprises two blades which are oppositely arranged; a sleeve is arranged between the two blades; two supporting columns are fixedly arranged on the outer wall of the sleeve, and each supporting column is rotationally connected to the blade on the corresponding side in a penetrating mode. A threaded rod is sleeved in the sleeve in a threaded manner and is connected with a rotating shaft through a universal joint; and the transmission assembly synchronously drives the three groups of disconnecting links to rotate and switch station states. Therefore, according to the utility model, the rotation of the disconnecting link piece is controlled in a threaded transmission mode, the rotation angle and the stop position of the disconnecting link piece can be accurately controlled, and the station adjustment is accurate and controllable. Moreover, the screw-thread fit clearance is small, and the disconnecting link has no rollback space, thereby guaranteeing the effective contact of the connector.

Description

Technical Field

[0001] The utility model belongs to the technical field of electrical switches, and particularly relates to a blade synchronous linkage type three-position disconnector. Background Art

[0002] The existing three-position disconnectors have problems such as complex structure, large volume, troublesome operation, and inability to meet the requirements of miniaturization. Chinese Patent CN202210388226.8 discloses a three-position disconnector, which solves the problems existing in the existing disconnectors to a certain extent.

[0003] However, for the disconnector disclosed in this patent, a transmission structure is composed of components such as bevel gears, hexagonal shafts, and crank arms to control the movement of the blades. The staying position of the blades is controlled by controlling the rotation angle of the bevel gear. The control difficulty is high. A small change in the rotation angle of the bevel gear will cause a large swing in the blade segment, reducing the position control accuracy of the blade.

[0004] After the blade contacts the contact, under the action of the resilience force, since there are many components and connection parts in the transmission structure, and there are gaps at each connection part, the accumulation of multiple gaps leaves a certain amount of retraction space for the blade, making the blade not fit tightly with the contact, resulting in poor contact problems.

[0005] In summary, it is obvious that the prior art has inconveniences and defects in actual use, so it is necessary to be improved. Summary of the Utility Model

[0006] Aiming at the above defects, the utility model mainly provides a blade synchronous linkage type three-position disconnector to solve the technical problem of inaccurate control of the blade movement trajectory.

[0007] To solve the above problems, the utility model provides a blade synchronous linkage type three-position disconnector, which includes an operating mechanism and a position switching mechanism; the operating mechanism is connected to the position switching mechanism through a transmission component;

[0008] The position switching mechanism includes three groups of switch components arranged in parallel at equal intervals; each switch component includes a circuit breaker pole column, on which a knife switch member is rotatably connected; it also includes a closing contact and a grounding contact;

[0009] The transmission component synchronously drives the knife switch members of the three groups of switch components to rotate to switch the position states between the closing contact and the grounding contact;

[0010] The knife switch member includes two blades arranged opposite to each other; one ends of the two blades are rotatably connected to the circuit breaker pole column, and the other ends are used to connect the closing contact or the grounding contact; a sleeve is arranged between the two blades of the knife switch member; two support columns are fixedly arranged on the outer wall of the sleeve, and each support column rotatably penetrates through the corresponding blade on one side;

[0011] The threaded rod is threadedly sleeved in the sleeve, and the threaded rod is connected to the rotating shaft through a universal joint; the rotating shaft is connected to the transmission assembly.

[0012] According to the blade synchronous linkage three-station isolating switch of the utility model, the station states of the knife switch member include:

[0013] Connected state: the switch is connected to the connecting contact;

[0014] Grounding state: the switch is connected to the grounding contact;

[0015] Isolation state: the switch is not connected to either the connection contact or the grounding contact.

[0016] According to the blade synchronous linkage type three-station isolating switch of the utility model, the thread on the threaded rod is a trapezoidal thread.

[0017] According to the blade synchronous linkage three-station isolating switch of the utility model, the transmission assembly includes a sprocket fixedly sleeved on three rotating shafts, and the sprockets between two adjacent rotating shafts are connected by a transmission chain.

[0018] According to the blade synchronous linkage three-position isolating switch of the utility model, the operating mechanism has a magnetic fluid; the rotating shaft of the switch component located in the middle position is connected to the magnetic fluid; the operating mechanism also includes a drive motor, and the drive motor is transmission-connected to the magnetic fluid.

[0019] According to the blade synchronous linkage three-station disconnector of the utility model, the structure of the connection contact is as follows: the width gradually increases from the top to the bottom, and the top of the connection contact has an inclined upper guide surface.

[0020] According to the blade synchronous linkage three-station isolating switch of the utility model, a guide piece is further provided on the side of the connection contact facing the knife switch; a guide groove is provided on the guide piece, and the lower end of the threaded rod movably extends into the guide groove.

[0021] According to the blade synchronous linkage type three-station isolating switch of the utility model, the guide member has two parallel guide plates, and the guide groove is formed between the two guide plates.

[0022] According to the blade synchronous linkage three-position isolating switch of the utility model, the connection contact is fixed on the contact seat, the contact seat is fixed on the insulator; and the guide piece is fixed on the contact seat.

[0023] According to the blade synchronous linkage three-position isolating switch of the utility model, it also includes a frame box, and the switch assembly is installed in the frame box; the rotating shaft is arranged in the rotating shaft seat, and the rotating shaft seat is fixed on the mounting plate; the mounting plate is fixed on the outside of the frame box; and the operating mechanism is fixed on the mounting plate.

[0024] In summary, the utility model controls the rotation of the knife gate by means of thread transmission, can accurately control the rotation angle and the stop position of the knife gate, and makes the position adjustment precisely controllable. In addition, the thread matching clearance is small, and the knife gate has no retreat space, which ensures the effective contact of the joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of an embodiment of the isolating switch of the utility model;

[0026] Figure 2 yes Figure 1 The structural diagram of the middle part of the area;

[0027] Figure 3 It is a structural schematic diagram of the transmission assembly of the isolating switch of the utility model;

[0028] Figure 4 yes Figure 3 Schematic diagram of the structure of the middle B area;

[0029] Figure 5 yes Figure 2 Schematic diagram of the structure of the middle A area;

[0030] Figure 6 It is a structural schematic diagram of the isolating state of the isolating switch of the utility model;

[0031] Figure 7 It is a structural schematic diagram of the grounding state of the isolating switch of the utility model;

[0032] In the figure: 1- knife switch, 11- circuit breaker pole, 12- blade; 2- connection contact, 21- insulator, 22- bracket, 23- guide member, 24- contact seat, 25- upper guide surface; 3- grounding contact, 4- threaded rod, 41- sleeve, 411- support column; 42- shaft seat, 43- rotating shaft, 44- transmission chain, 45- universal joint; 100- operating mechanism, 101- driving motor, 102- magnetic fluid; 200- frame box, 201- mounting plate; 300- transmission assembly. DETAILED DESCRIPTION

[0033] See also Figure 1The utility model provides a blade synchronous linkage three-station isolating switch, comprising an operating mechanism 100 and a station switching mechanism; the operating mechanism 100 is connected to the station switching mechanism through a transmission assembly 300;

[0034] See also Figure 2 The station switching mechanism includes three groups of switch components arranged in parallel at equal intervals; the switch component includes a circuit breaker pole 11, and a knife switch 1 is rotatably connected to the circuit breaker pole 11; and also includes a connection contact 2 and a grounding contact 3;

[0035] The transmission assembly 300 synchronously drives the knife switch components 1 of the three switch assemblies to rotate, switching the working position state between the connection contact 2 and the grounding contact 3; Figure 6 and Figure 7 , the working position states of the knife switch member 1 include:

[0036] Connected state: the switch element 1 is connected to the connecting contact 2;

[0037] Grounding state: the switch 1 is connected to the grounding contact 3;

[0038] Isolation state: the switch 1 is not connected to the connection contact 2 and the grounding contact 3;

[0039] See also Figure 3 and Figure 4 The knife switch 1 comprises two blades 12 arranged opposite to each other; one end of the two blades 12 is rotatably connected to the circuit breaker pole 11, and the other end is used to connect the contact 2 or the grounding contact 3; a sleeve 41 is provided between the two blades 12 of the knife switch 1; two support columns 411 are fixed on the outer wall of the sleeve 41, and each support column 411 is rotatably connected to the blade 12 on the corresponding side;

[0040] The sleeve 41 is threadedly sleeved with a threaded rod 4, and the threaded rod 4 is connected to a rotating shaft 43 via a universal joint 45; the rotating shaft 43 is connected to the transmission assembly 300;

[0041] The transmission assembly 300 synchronously drives the three rotating shafts 43 to rotate in a forward or reverse direction, so that the sleeve 41 moves along the axial direction of the threaded rod 4, thereby rotating the knife switch 1 and switching the working position state between the connection contact 2 and the grounding contact 3.

[0042] The isolating switch of the utility model controls the rotation of the knife switch 1 by means of thread transmission, and can accurately control the rotation angle and the stop position of the knife switch 1, so that the position adjustment is precisely controllable. In addition, the thread matching clearance is small, and the knife switch 1 has no retreat space, which ensures the effective contact of the joint.

[0043] Furthermore, the thread on the threaded rod 4 is a trapezoidal thread with high matching accuracy, which is conducive to accurately controlling the movement trajectory of the knife gate component 1.

[0044] As an embodiment, the transmission assembly 300 includes a sprocket fixedly mounted on three rotating shafts 43, and the sprockets between two adjacent rotating shafts 43 are connected by a transmission chain 44; the rotation of the rotating shaft 43 located in the middle is driven, and the synchronous and same-speed rotation of the three rotating shafts 43 can be achieved through the cooperation of the transmission chain 44 and the sprocket.

[0045] As an embodiment, the operating mechanism 100 has a magnetic fluid 102; the rotating shaft 43 of the switch assembly located in the middle position is connected to the magnetic fluid 102; the operating mechanism 100 also includes a driving motor 101, and the driving motor 101 is connected to the magnetic fluid 102 through a gear set;

[0046] The driving motor 101 can accurately control the parameters such as the rotation direction, number of rotations, and rotation speed of the rotating shaft 43, thereby accurately controlling the switching action of the working position state of the knife switch component 1.

[0047] The operating mechanism 100 of the utility model can select known applicable equipment, such as the structure disclosed in Chinese patent CN202210388226.8.

[0048] As an embodiment, the utility model further comprises a frame box 200, wherein the switch assembly is installed in the frame box 200; the rotating shaft 43 is arranged in the rotating shaft seat 42, and the rotating shaft seat 42 is fixed on the mounting plate 201; the mounting plate 201 is fixedly arranged outside the frame box 200; the operating mechanism 100 is fixedly arranged on the mounting plate 201;

[0049] The overall structure is compact, stable, and easy to manufacture, install, and use.

[0050] As an embodiment, a guide member 23 is further provided on the side of the connection contact 2 facing the knife switch 1; a guide groove is opened on the guide member 23, and the lower end of the threaded rod 4 is movably extended into the guide groove; during the rotation of the threaded rod 4, the guide member 23 limits the lateral swing of the threaded rod 4, so that it can only swing back and forth along the direction of the guide groove, ensuring that the two blades 12 of the knife switch 1 can be accurately clamped with the contact to maintain the quality of the joint.

[0051] Furthermore, the guide member 23 has two parallel guide plates, and the guide groove is formed between the two guide plates. The guide plates increase the blocking area to prevent the threaded rod 4 from escaping from the guide groove at the extreme position.

[0052] See also Figure 5As an embodiment, the structure of the connection contact 2 is that the width gradually increases from the top to the bottom, so that the two blades 12 of the knife switch 1 can only clamp on the two sides of the connection contact 2 to ensure the contact quality.

[0053] Furthermore, the top of the connection contact 2 has an inclined upper guide surface 25 to prevent the blade 12 from being blocked on the top plane of the connection contact 2 due to deviation.

[0054] As an embodiment, the connecting contact 2 is fixed on the contact seat 24, and the contact seat 24 is fixed on the insulator 21; each insulator 21 is fixedly mounted on the bracket 22, which is convenient for position fixation. The guide member 23 is fixed on the contact seat 24.

[0055] In summary, the utility model provides a blade synchronous linkage three-station isolating switch, which controls the rotation of the knife switch by thread transmission, can accurately control the rotation angle and the stop position of the knife switch, and makes the station adjustment accurate and controllable. In addition, the thread matching clearance is small, and the knife switch has no retreat space, which ensures the effective contact of the joint.

[0056] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, technicians familiar with the field can make various corresponding changes and deformations based on the present invention, but these corresponding changes and deformations should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A blade synchronous linkage three-position isolating switch, characterized in that: It includes an operating mechanism and a workstation switching mechanism; the operating mechanism is connected to the workstation switching mechanism through a transmission assembly; The station switching mechanism comprises three groups of switch assemblies arranged in parallel at equal intervals; the switch assembly comprises a circuit breaker pole, on which a knife switch is rotatably connected; and also comprises a connection contact and a grounding contact; The transmission assembly synchronously drives the knife switch components of the three switch assemblies to rotate, switching the working position state between the connection contact and the grounding contact; The knife switch comprises two blades arranged opposite to each other; one end of the two blades is rotatably connected to the pole of the circuit breaker, and the other end is used to connect the contact or the grounding contact; a sleeve is arranged between the two blades of the knife switch; two support columns are fixed on the outer wall of the sleeve, and each support column is rotatably connected to the blade on the corresponding side; The threaded rod is threadedly sleeved in the sleeve, and the threaded rod is connected to the rotating shaft through a universal joint; the rotating shaft is connected to the transmission assembly.

2. The blade synchronous linkage three-position isolating switch according to claim 1, characterized in that: The working position states of the knife switch member include: Connected state: the switch is connected to the connecting contact; Grounding state: the switch is connected to the grounding contact; Isolation state: the switch is not connected to either the connection contact or the grounding contact.

3. The blade synchronous linkage three-position isolating switch according to claim 1, characterized in that: The threads on the threaded rod are trapezoidal threads.

4. The blade synchronous linkage three-position isolating switch according to claim 1, characterized in that: The transmission assembly comprises a sprocket fixedly sleeved on three rotating shafts, and the sprockets between two adjacent rotating shafts are connected by a transmission chain.

5. The blade synchronous linkage three-position isolating switch according to claim 1, characterized in that: The operating mechanism has a magnetic fluid; the rotating shaft of the switch assembly located in the middle position is connected to the magnetic fluid; the operating mechanism also includes a driving motor, and the driving motor is transmission-connected to the magnetic fluid.

6. The blade synchronous linkage three-position isolating switch according to claim 1, characterized in that: The structure of the connection contact is as follows: the width gradually increases from the top to the bottom, and the top of the connection contact has an inclined upper guide surface.

7. The blade synchronous linkage three-position isolating switch according to any one of claims 1 to 6, characterized in that: A guide piece is also provided on the side of the connection contact facing the knife switch piece; a guide groove is provided on the guide piece, and the lower end of the threaded rod movably extends into the guide groove.

8. The blade synchronous linkage three-position isolating switch according to claim 7, characterized in that: The guide member has two guide plates arranged in parallel, and the guide groove is formed between the two guide plates.

9. The blade synchronous linkage three-position isolating switch according to claim 7, characterized in that: The connecting contact is fixed on the contact seat, and the contact seat is fixed on the insulator; the guide piece is fixed on the contact seat.

10. The blade synchronous linkage three-position isolating switch according to claim 9, characterized in that: It also includes a frame box, the switch assembly is installed in the frame box; the rotating shaft is arranged in the rotating shaft seat, and the rotating shaft seat is fixed on the mounting plate; the mounting plate is fixedly arranged outside the frame box; and the operating mechanism is fixedly arranged on the mounting plate.

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