A disconnector with a self-locking mechanism

Abstract

The utility model relates to the technical field of disconnecting switch, concretely is a disconnecting switch with self -locking mechanism, including base and fixedly installed insulating pillar no.

Description

Technical Field

[0001] This utility model relates to the field of disconnecting switch technology, specifically to a disconnecting switch with a self-locking mechanism. Background Technology

[0002] High-voltage disconnect switches are common switching devices in the electrical systems of power plants and substations. They are mainly used to ensure the safety of high-voltage equipment during maintenance and have a significant impact on the safe operation of power plants and substations.

[0003] The contact pressure after closing depends entirely on the "instantaneous thrust" during operation. If there is no self-locking structure in the disconnector, when the disconnector is subjected to external environmental vibrations (such as vibration of factory machinery or vibration of substation main transformer operation), temperature changes (heat expansion and contraction of conductive rods caused by load fluctuations), or slight external forces (such as inspection personnel accidentally touching the operating rod), the disconnector may experience slight loosening and displacement, resulting in a reduction in the contact area with the contacts and a decrease in pressure. This can lead to a sharp increase in contact resistance, which can easily trigger a hazard. Utility Model Content

[0004] The purpose of this invention is to provide a disconnecting switch with a self-locking mechanism to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a disconnecting switch with a self-locking mechanism, comprising a base and two insulating supports, one and two, fixedly installed at both ends of the top of the base. A knife switch is rotatably mounted on the top of the first insulating support. A pull plate is fixedly mounted on the end of the knife switch near the first insulating support. An installation shaft is rotatably mounted on the top of the pull plate near the first insulating support. An unlocking plate is fixedly mounted on one side of the installation shaft. A self-locking mechanism is provided below the unlocking plate. An auxiliary mechanism is provided on the side of the unlocking plate away from the pull plate.

[0006] The self-locking mechanism includes an L-shaped hook and a pressing component. The L-shaped hook is rotatably connected to the pull plate. A groove is provided at the top of the L-shaped hook near the unlocking plate. A transmission rod is movably installed inside the groove and is fixedly connected to the unlocking plate.

[0007] The extrusion assembly includes a mounting block, which is fixedly connected to a pull plate. An installation rod is slidably mounted inside the mounting block. A spring is sleeved on the outside of the installation rod. A fixing plate is fixedly sleeved on the top end of the installation rod. The top end of the spring is fixedly connected to the bottom end of the fixing plate. The bottom end of the spring is fixedly connected to the mounting block.

[0008] The bottom of the unlocking plate near the spring has a second sliding groove. The top of the mounting rod passes through the second sliding groove. The fixing piece is located below the second sliding groove. A limiting piece is sleeved on the outside of the top of the mounting rod. The limiting piece is located above the second sliding groove. A fixing pin is fixedly sleeved on the top of the mounting rod.

[0009] The auxiliary mechanism includes a slide groove three, which is located at the end of the unlocking plate away from the pull plate. A sliding seat is slidably installed inside the slide groove three, and a counterweight is fixedly installed on the side of the sliding seat away from the unlocking plate. The two ends inside the slide groove three are respectively connected to a positioning hole one and a positioning hole two. A fixing component is provided inside the sliding seat.

[0010] The fixing component includes a threaded adjusting rod, which is threadedly connected to a sliding seat. A rotating seat is rotatably mounted on the bottom of the threaded adjusting rod, a push rod is rotatably mounted on the bottom of the rotating seat, and a positioning rod is rotatably mounted on the bottom of the push rod. The positioning rod cooperates with both positioning hole one and positioning hole two.

[0011] The first positioning hole and the second positioning hole are respectively located on both sides of the mounting shaft, and a circular groove is provided at the top of the pull plate.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 0. The self-locking mechanism ensures that the disconnector and its corresponding contacts are self-locking, preventing slight loosening or displacement of the disconnector when subjected to external environmental vibrations or other factors. This ensures the normal operation of the disconnector and prevents hazards caused by disconnector displacement.

[0013] 1. Through the auxiliary mechanism, when the spring fails, the auxiliary unlocking plate exerts force on the L-shaped hook under the action of the counterweight. In the closed state, the L-shaped hook will not easily disengage from the corresponding position, which improves the effectiveness of the self-locking mechanism. At the same time, the position of the counterweight can be adjusted according to the installation direction of the disconnecting switch. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of one side of the pull plate structure of this utility model; Figure 3 This is a partial structural schematic diagram of the present invention; Figure 4 This is a schematic diagram of one side of the unlocking plate of this utility model; Figure 5 This is a schematic diagram of the extrusion assembly structure of this utility model; Figure 6 This is a schematic diagram of the other side of the unlocking plate of this utility model; Figure 7 This is a schematic diagram of the internal structure of the sliding seat of this utility model.

[0015] The components represented by each number in the attached diagram are listed below: 1. Base; 2. Insulating support column one; 3. Insulating support column two; 4. Knife switch; 5. Pull plate; 6. Mounting shaft; 7. Unlocking plate; 8. L-shaped hook; 9. Slide groove one; 10. Transmission rod; 11. Mounting block; 12. Mounting rod; 13. Spring; 14. Fixing plate; 15. Slide groove two; 16. Limiting plate; 17. Fixing pin; 18. Slide groove three; 19. Sliding seat; 20. Counterweight block; 21. Positioning hole one; 22. Positioning hole two; 23. Threaded adjusting rod; 24. Rotating seat; 25. Push rod; 26. Positioning rod; 27. Circular groove. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] This utility model provides a technical solution: such as Figure 1 - Figure 7 The disconnect switch shown includes a base 1 and insulating support column 1 2 and insulating support column 2 3 fixedly installed at both ends of the top of the base 1. A knife switch 4 is rotatably installed on the top of the insulating support column 1 2. A pull plate 5 is fixedly installed on the end of the knife switch 4 near the insulating support column 1 2. An installation shaft 6 is rotatably installed on the top end of the pull plate 5 near the insulating support column 1 2. An unlocking plate 7 is fixedly installed on one side of the installation shaft 6. A self-locking mechanism is provided below the unlocking plate 7. An auxiliary mechanism is provided on the side of the unlocking plate 7 away from the pull plate 5.

[0018] The self-locking mechanism includes an L-shaped hook 8 and a pressing component. The L-shaped hook 8 is rotatably connected to the pull plate 5. A groove 9 is provided at the top of the L-shaped hook 8 near the unlocking plate 7. A transmission rod 10 is movably installed inside the groove 9 and is fixedly connected to the unlocking plate 7.

[0019] The extrusion assembly includes a mounting block 11, which is fixedly connected to the pull plate 5. A mounting rod 12 is slidably mounted inside the mounting block 11. A spring 13 is sleeved on the outside of the mounting rod 12. A fixing plate 14 is fixedly sleeved on the top of the mounting rod 12. The top of the spring 13 is fixedly connected to the bottom of the fixing plate 14, and the bottom of the spring 13 is fixedly connected to the mounting block 11.

[0020] The bottom of the unlocking plate 7 is provided with a second groove 15 near the spring 13. The top of the mounting rod 12 passes through the second groove 15. The fixing piece 14 is located below the second groove 15. The top of the mounting rod 12 is fitted with a limiting piece 16, which is located above the second groove 15. The top of the mounting rod 12 is fixedly fitted with a fixing pin 17.

[0021] The auxiliary mechanism includes a slide groove 3 18, which is located at the end of the unlocking plate 7 away from the pull plate 5. A sliding seat 19 is slidably installed inside the slide groove 3 18. A counterweight block 20 is fixedly installed on the side of the sliding seat 19 away from the unlocking plate 7. The two ends inside the slide groove 3 18 are respectively connected to positioning hole 1 21 and positioning hole 22. A fixing component is provided inside the sliding seat 19.

[0022] The fixing component includes a threaded adjusting rod 23, which is threadedly connected to the sliding seat 19. A rotating seat 24 is rotatably mounted on the bottom of the threaded adjusting rod 23. A push rod 25 is rotatably mounted on the bottom of the rotating seat 24. A positioning rod 26 is rotatably mounted on the bottom of the push rod 25. The positioning rod 26 cooperates with both the positioning hole 1 21 and the positioning hole 22.

[0023] Positioning hole 1 21 and positioning hole 22 are respectively set on both sides of the mounting shaft 6, and a circular groove 27 is opened at the top of the pull plate 5.

[0024] Working principle: When the circuit breaker is opened, the unlocking plate 7 is pulled upwards, and the unlocking plate 7 rotates along the mounting shaft 6. The end of the unlocking plate 7 near the spring 13 moves upwards, while the transmission rod 10 slides inside the slide groove 9, thereby causing the L-shaped hook 8 to rotate and disengage from the hook plate position in the insulating support 3. It should be noted that the hook plate position in the insulating support 3 is existing technology and will not be described in detail here. While the unlocking plate 7 rotates, it causes the top end of the mounting rod 12 to slide accordingly inside the slide groove 15. At the same time, under the action of the limiting piece 16 and the fixing pin 17, the mounting rod 12... Rod 12 and unlocking plate 7 move upward synchronously. At this time, spring 13 is stretched. After L-shaped hook 8 is disengaged, the knife switch 4 is moved upward by pulling pull plate 5, which can open the switch. When closing the switch again, under the action of spring 13, L-shaped hook 8 is re-engaged into the hook plate position in insulating support 2 3, realizing the self-locking effect of knife switch 4 and corresponding contact. This prevents the disconnecting switch from being slightly loosened or displaced by external environmental vibrations and other factors, ensuring the normal use of the disconnecting switch and preventing the danger triggered by the displacement of knife switch 4. The position of the counterweight 20 can be adjusted according to the installation direction of the disconnector switch, such as... Figure 1As shown, when the knife switch 4 is located above the base 1, the counterweight 20 is located at the position of the positioning hole 21. If the knife switch 4 is installed below the base 1, the position of the counterweight 20 is adjusted. During adjustment, the threaded adjusting rod 23 is rotated, which moves the rotating seat 24. The push rod 25 is rotated under force, thereby causing the positioning rod 26 to disengage from the positioning hole 21. At this time, the sliding seat 19 is unlocked, and it can be slid along the sliding groove 18 to the position of the positioning hole 22. Then, the threaded adjusting rod 23 is reversed to lock the positioning rod 26 into the positioning hole 22. Through the auxiliary mechanism, when the spring 13 fails, the auxiliary unlocking plate 7 exerts force on the L-shaped hook 8 under the action of the counterweight 20. In the closed state, the L-shaped hook 8 will not easily disengage from the corresponding position, which improves the effectiveness of the self-locking mechanism. At the same time, the position of the counterweight 20 can be adjusted according to the installation direction of the disconnect switch.

[0025] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A disconnecting switch with a self-locking mechanism, comprising a base (1) and insulating support post one (2) and insulating support post two (3) fixedly installed at both ends of the top of the base (1), characterized in that: A knife switch (4) is rotatably installed on the top of the insulating support (2). A pull plate (5) is fixedly installed on one end of the knife switch (4) near the insulating support (2). An installation shaft (6) is rotatably installed on one end of the pull plate (5) near the insulating support (2). An unlocking plate (7) is fixedly installed on one side of the installation shaft (6). A self-locking mechanism is provided below the unlocking plate (7). An auxiliary mechanism is provided on the side of the unlocking plate (7) away from the pull plate (5).

2. A disconnecting switch with a self-locking mechanism according to claim 1, characterized in that: The self-locking mechanism includes an L-shaped hook (8) and a pressing assembly. The L-shaped hook (8) is rotatably connected to the pull plate (5). A groove (9) is provided at the top of the L-shaped hook (8) near the unlocking plate (7). A transmission rod (10) is movably installed inside the groove (9). The transmission rod (10) is fixedly connected to the unlocking plate (7).

3. A disconnecting switch with a self-locking mechanism according to claim 2, characterized in that: The extrusion assembly includes an installation block (11), which is fixedly connected to the pull plate (5). An installation rod (12) is slidably installed inside the installation block (11). A spring (13) is sleeved on the outside of the installation rod (12). A fixing plate (14) is fixedly sleeved on the outside of the top end of the installation rod (12). The top end of the spring (13) is fixedly connected to the bottom of the fixing plate (14). The bottom end of the spring (13) is fixedly connected to the installation block (11).

4. A disconnecting switch with a self-locking mechanism according to claim 3, characterized in that: The bottom of the unlocking plate (7) near the spring (13) has a second groove (15), the top of the mounting rod (12) passes through the second groove (15), the fixing piece (14) is located below the second groove (15), the top of the mounting rod (12) is fitted with a limiting piece (16), the limiting piece (16) is located above the second groove (15), and the top of the mounting rod (12) is fixedly fitted with a fixing pin (17).

5. A disconnecting switch with a self-locking mechanism according to claim 1, characterized in that: The auxiliary mechanism includes a slide groove three (18), which is located at one end of the unlocking plate (7) away from the pull plate (5). A sliding seat (19) is slidably installed inside the slide groove three (18). A counterweight (20) is fixedly installed on the side of the sliding seat (19) away from the unlocking plate (7). The two ends inside the slide groove three (18) are respectively connected to a positioning hole one (21) and a positioning hole two (22). A fixing component is provided inside the sliding seat (19).

6. A disconnecting switch with a self-locking mechanism according to claim 5, characterized in that: The fixing component includes a threaded adjusting rod (23), which is threadedly connected to a sliding seat (19). A rotating seat (24) is rotatably mounted on the bottom of the threaded adjusting rod (23). A push rod (25) is rotatably mounted on the bottom of the rotating seat (24). A positioning rod (26) is rotatably mounted on the bottom of the push rod (25). The positioning rod (26) cooperates with positioning hole one (21) and positioning hole two (22).

7. A disconnecting switch with a self-locking mechanism according to claim 6, characterized in that: The positioning hole one (21) and positioning hole two (22) are respectively provided on both sides of the mounting shaft (6), and the top of the pull plate (5) is provided with a circular groove (27).

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