Pole switch

Abstract

The utility model relates to the technical field of vacuum switches, in particular to a pole-mounted switch, which comprises a switch base, a solid-sealed polar pole is arranged at the top of the switch base, a linkage plate is arranged at the bottom of the solid-sealed polar pole, the linkage plate is fixedly connected with an insulating pull rod of the solid-sealed polar pole, the linkage plate is positioned inside the switch base, a main shaft is arranged on one side of the linkage plate, and the main shaft is fixedly connected with the switch base. The two ends of the main shaft are pivoted with the switch base, one axial end of the main shaft extends to the outer side of the switch base and is connected with an operation pull rod, the main shaft is provided with a plurality of pull rod connecting levers, each pull rod connecting lever is provided with a pressing part capable of rotating along with the main shaft, and the pressing part is of an extending structure parallel to the radial plane of the main shaft. And after rotating according to the threshold direction, the hold-down part can abut against the linkage plate and drive the insulation pull rod of the solid-sealed polar pole to move downwards. According to the utility model, problems of poor synchronism of a transmission structure and overlong opening rebound time during closing and opening of some existing pole-mounted switches can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum switches, in particular to a pole-mounted switch. Background Art

[0002] During power grid operation, due to long-term equipment operation, insulation aging, and external environmental factors, short circuits can occur in power lines, generating large short-circuit currents. Severe short-circuit currents can damage components in the circuit and even cause power outages and fires, resulting in inconvenience and economic losses. When a short circuit occurs, quickly disconnecting the faulty line is the primary safety measure. Currently, the commonly used safety devices in 10kV power grids are mostly vacuum circuit breakers (also called pole-mounted switches) that operate with electric spring mechanisms or permanent magnet and manual spring mechanisms. These circuit breakers often use a single operating mechanism connected by three connecting rods to achieve synchronous operation. Due to the large number of structural components, structural assembly and parameter debugging are inconvenient, processing and assembly errors lead to poor synchronization of three-phase operation, many moving parts, long opening and closing times, high mechanical losses, and a short mechanical lifespan of the spring mechanism.

[0003] Chinese patent CN201510439913.8 discloses a permanent magnetic vacuum circuit breaker switch, which includes: a permanent magnetic operating mechanism, a vacuum-sealed pole, a main shaft and a switch frame; wherein, when the vacuum circuit breaker controller energizes the closing electromagnetic coil, the moving iron core top rod assembly is attracted to the closing iron core by the magnetic field attraction, and at the same time, the moving iron core top rod assembly and the permanent magnet generate a magnetic field effect, and the moving iron core top rod assembly moves to extend toward the closing end, driving the main shaft to rotate through the output transition crank arm assembly, and the main shaft pull rod crank arm pulls the insulating pull rod upward to achieve the closing state, and the opening state is the opposite. A permanent magnetic vacuum circuit breaker switch of the present invention has a sealed pole outer shell and a vacuum arc extinguishing chamber as insulating media, achieving a double insulation arc extinguishing effect; the existing mechanical operating mechanism is eliminated, reducing the number of transmission parts; the opening and closing are controlled by manually operating the cam mechanism, or by using a permanent magnetic mechanism vacuum circuit breaker controller.

[0004] In the above technical solution, the main shaft forms a linkage structure with the vacuum-sealed pole through the pull rod arm, wherein a through hole is provided on the pull rod arm for directly connecting the assembly pin with the bottom of the vacuum-sealed pole. However, this structure will cause a loose gap in the connection between the two, which will be more obvious when the main shaft drives the pull rod arm to move, thereby increasing the transmission error from the main shaft to the vacuum-sealed pole, that is, the synchronization of the transmission structure during closing and opening operations is poor. Utility Model Content

[0005] The utility model provides a pole-mounted switch, which is conducive to solving the problems of poor synchronization of transmission structures and long rebound time of opening when some current pole-mounted switches are closed and opened.

[0006] The utility model is achieved in this way:

[0007] A pole-mounted switch comprises a switch base, a sealed pole is provided on the top of the switch base, a linkage plate is provided at the bottom of the sealed pole, the linkage plate is connected and fixed to the insulating pull rod of the sealed pole, the linkage plate is located inside the switch base, and a main shaft is provided on one side of the linkage plate, both ends of the main shaft are pivotally connected to the switch base, one axial end of the main shaft extends to the outside of the switch base and is connected to an operating pull rod, a plurality of pull rod arms are provided on the main shaft, the pull rod arms have a holding portion that can rotate with the main shaft, the holding portion is an extension structure parallel to the radial plane of the main shaft, and the holding portion can press the linkage plate and drive the insulating pull rod of the sealed pole downward after rotating in the threshold direction; an anti-jump cone sleeve is provided between the bottom of the insulating pull rod and the pole bottom plate.

[0008] On the basis of the above technical solution, a group of symmetrically arranged mounting holes are provided on the switch base, and the mounting holes pass through the shell of the switch base transversely for assembling the main shaft.

[0009] Based on the above technical solution, three laterally spaced embedded poles are provided on the switch base, and the bottom of the insulating pull rod of each embedded pole is independently connected to a linkage plate. The linkage plate is a horizontally arranged plate structure and the three linkage plates are linearly spaced and distributed on the same side of the main shaft.

[0010] Based on the above technical solution, three groups of pressing mechanisms are provided on the main shaft, each group of pressing mechanisms is composed of two pull rod arms spaced apart along the axial direction of the main shaft, and the pressing parts of the two pull rod arms in the same group are aligned in the axial direction of the main shaft, and can synchronously abut the same linkage plate after rotation.

[0011] On the basis of the above technical solution, a reset mechanism is provided between the main shaft and the switch base, and the reset mechanism can cause the main shaft to automatically rotate in the opposite direction and reset after rotation.

[0012] On the basis of the above technical solution, the reset mechanism includes a reset crank arm fixed on the main shaft, a pulling column arranged on the switch base, and a reset spring arranged between the reset crank arm and the pulling column.

[0013] Based on the above technical solution, a gate opening indicator is provided on the outer side wall of the pull rod.

[0014] On the basis of the above technical solution, the pull rod arm is fixedly connected to the main shaft.

[0015] On the basis of the above technical solution, the reset arm is fixedly connected to the main shaft.

[0016] Compared with the prior art, the present invention has at least the following advantages:

[0017] 1. The utility model arranges a linkage plate at the bottom of the insulating pull rod of the sealed pole, arranges a main shaft on the switch base, and arranges a pull rod crank arm used in conjunction with the linkage plate on the main shaft. The extension effect of the linkage plate is used to extend the transmission structure related to the up and down movement of the insulating pull rod. At the same time, the main shaft is used to accurately drive the rotation and swing of the pull rod crank arm to abut and press the linkage plate, thereby realizing the pull-down control of the insulating pull rod. Compared with the existing connection method of through hole and pin shaft, this structure has better structural strength and higher transmission accuracy, which can ensure the synchronization and tightness of the transmission structure during operation.

[0018] 2. The utility model provides an anti-jump cone sleeve between the insulating pull rod of the sealed pole and the pole bottom plate, so that the insulating pull rod can be promptly converted from dynamic to static after it moves downward. The cone sleeve can prevent the insulating pull rod from continuing to jump after it moves downward, thereby improving its activity stability, which is conducive to solving the problem of long trip rebound time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 This is a schematic structural diagram of an isolated column-mounted switch in one embodiment;

[0021] Figure 2 This is a schematic diagram of the housing structure of a switch base in one embodiment;

[0022] Figure 3 Schematic diagram of the three-dimensional structure of the main shaft in one embodiment;

[0023] Figure 4 for Figure 3 Schematic diagram of the partial structure of the middle tie rod crank arm and the reset crank arm;

[0024] Figure 5 for Figure 1 Schematic diagram of the internal structure;

[0025] Figure 6 for Figure 5 Schematic diagram of the partial structure of the middle linkage plate and the tie rod arm;

[0026] Figure 7 is a cross-sectional view of a sealed pole in one embodiment;

[0027] Figure 8 for Figure 7 A partial enlarged view of middle A.

[0028] Markings in the figure: 1. Switch base; 11. Mounting hole; 12. Pulling column; 2. Sealed pole; 21. Insulating pull rod; 22. Pole bottom plate; 23. Cone sleeve; 3. Linkage plate; 4. Main shaft; 5. Pull rod arm; 51. Holding part; 6. Reset arm; 61. Pulling hole; 7. Operating pull rod. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the utility model for which protection is claimed, but merely represents selected embodiments of the present invention.

[0030] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically specified.

[0031] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] See also Figures 1 to 6 This embodiment discloses a pole-mounted switch, including a switch base 1, a sealed pole 2, a main shaft 4, an operating rod 7, a rod crank arm 5, a linkage plate 3 and a reset crank arm 6.

[0034] The switch base 1 has a rectangular housing, comprised of an open-bottomed sheet metal shell and a bottom cover. The interior serves as an assembly space, and the shell protects and supports the internal components. A pair of mounting holes 11 are provided on the left and right side walls of the switch base 1. These through-holes extend horizontally through the housing of the switch base 1. Two aligned mounting holes 11 are used to mount the spindle 4.

[0035] The switch base 1 is topped with three laterally spaced, encapsulated poles 2. These poles 2 include insulating rods, an arc extinguishing chamber, a current transformer, wiring terminals, and flexible connectors (not shown). These are conventional devices, and their specific structure and operating principle will not be described in detail here. Those skilled in the art can select and implement existing technologies based on their actual operating conditions. The insulating rods in this embodiment are located at the bottom of the encapsulated poles 2 and can move vertically up and down, cooperating with other components to complete the opening operation.

[0036] Combine Figure 5 and Figure 6 As shown, a linkage plate 3 is provided at the bottom of the sealed pole 2. The linkage plate 3 is fixed to the insulating pull rod of the sealed pole 2 by bolts, and the two form a movable component that rises and falls synchronously. It should be noted that the bottom of the insulating pull rod of each sealed pole 2 is independently connected to a linkage plate 3. The linkage plate 3 is a horizontally arranged plate structure, and three linkage plates 3 are linearly spaced and distributed on the same side of the main shaft 4.

[0037] Furthermore, the linkage plate 3 is located inside the switch base 1, and a main shaft 4 is provided on one side of the linkage plate 3. The two ends of the main shaft 4 form a pivot structure with the switch base 1 through bearings and flanges. One axial end of the main shaft 4 extends to the outside of the switch base 1 and is connected to an operating rod 7. The directional rotation of the main shaft 4 can be controlled by swinging the operating rod 7 from the outside.

[0038] Six pull rod arms 5 are provided on the main shaft 4. The pull rod arms 5 have a holding portion 51 that can rotate with the main shaft 4. The holding portion 51 is an extension structure parallel to the radial plane of the main shaft 4, specifically a teardrop-shaped structure. After the holding portion 51 rotates in the threshold direction, it can press the linkage plate 3 and drive the insulating pull rod of the sealed pole 2 downward.

[0039] Specifically, the main shaft 4 is provided with three groups of holding mechanisms, each group of holding mechanisms is composed of two pull rod arms 5 spaced apart along the axial direction of the main shaft 4, and the holding portions 51 of the two pull rod arms 5 in the same group are aligned in the axial direction of the main shaft 4, and can synchronously abut the same linkage plate 3 after rotation. Figure 6As shown, when the two pull rod arms 5 in the same group of pressing mechanisms are working, they can use the pressing portion 51 to respectively abut against the left and right sides of the same insulating pull rod, and at the same time press down the linkage plate 3 connected to the insulating pull rod, which is conducive to providing a relatively balanced pressing force on the linkage plate 3, thereby making the pressure on the insulating pull rod more balanced and reducing the deflection in the downward pulling direction.

[0040] Furthermore, a reset mechanism is provided between the main shaft 4 and the switch base 1, and the reset mechanism can cause the main shaft 4 to automatically rotate in the reverse direction and reset after rotation. Figure 2-Figure 4 The reset mechanism includes a reset crank arm 6 fixed to the main shaft 4, a pulling column 12 provided on the switch base 1, and a reset spring provided between the reset crank arm 6 and the pulling column 12 (the reset spring is not shown in the figure). The reset crank arm 6 is provided with a pulling hole 61 for hooking and fixing the reset spring, and the pulling column 12 is also provided with a corresponding pulling through-hole structure. The reset spring is specifically a tension spring structure, with both ends hooked and fixed to the pulling column 12 and the reset crank arm 6. When the reset crank arm 6 rotates with the main shaft 4, it will stretch the reset spring. When the external active control of the main shaft 4 ends, the reset spring will use its own elastic characteristics to provide a reset drive source for the main shaft 4, so that the main shaft 4 has the ability to automatically rotate and reset.

[0041] Further, combined Figure 7 and Figure 8 As shown, in this embodiment, an anti-jumping structure is provided between the insulating rod 21 of the sealed pole 2 and the pole bottom plate 22. Specifically, a cone sleeve 23 is provided at the through hole on the pole bottom plate 22 for the insulating rod 21 to pass through. The cone sleeve 23 is made of an elastic material, such as rubber, silicone, etc., which can undergo a certain degree of elastic deformation after being compressed to cooperate with the aperture structure to form a blocking limit structure. The middle part of the cone sleeve 23 has a longitudinal through hole for the insulating rod 21 to pass through. The cone sleeve 23 is sleeved on the insulating rod 21 and uses a variable diameter structure to form a clamping connection structure. The cone sleeve 23 forms a unidirectional limiting structure with a wide top and a narrow bottom at the through hole on the pole bottom plate 22. When the insulating rod 21 drives the cone sleeve 23 downward, the cone sleeve 23 will be relatively firmly blocked in the through hole of the pole bottom plate 22, thereby driving the insulating rod 21 to remain stationary. That is, it can help the insulating rod 12 not to continue to jump after descending, thereby improving its activity stability.

[0042] On the basis of the above technical solution, a trip indicator is provided on the outer side wall of the pull rod, which is provided with a vector arrow to serve as an indicator during operation.

[0043] It should be noted that, in this embodiment, the pull rod crank arm 5, the reset crank arm 6 and the main shaft 4 are fixedly connected by welding.

[0044] Among them, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention is described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A pole-mounted switch, comprising a switch base (1), wherein a sealed pole (2) is provided on the top of the switch base (1), characterized in that: A linkage plate (3) is provided at the bottom of the sealed pole (2), and the linkage plate (3) is connected and fixed to the insulating pull rod of the sealed pole (2). The linkage plate (3) is located inside the switch base (1), and a main shaft (4) is provided on one side of the linkage plate (3). Both ends of the main shaft (4) are pivotally connected to the switch base (1), and one axial end of the main shaft (4) extends to the outside of the switch base (1) and is connected to an operating pull rod (7). A plurality of pull rod crank arms (5) are provided on the main shaft (4), and the pull rod crank arms (5) have a holding portion (51) that can rotate with the main shaft (4). The holding portion (51) is an extended structure parallel to the radial plane of the main shaft (4). After the holding portion (51) rotates in the threshold direction, it can press the linkage plate (3) and drive the insulating pull rod of the sealed pole (2) downward; an anti-jump cone sleeve is provided between the bottom of the insulating pull rod and the pole bottom plate.

2. A pole-mounted switch according to claim 1, characterized in that: The switch base (1) is provided with a group of symmetrically arranged mounting holes (11), the mounting holes (11) passing through the housing of the switch base (1) transversely and being used for assembling the main shaft (4).

3. A pole-mounted switch according to claim 1, characterized in that: The switch base (1) is provided with three laterally spaced solid-sealed poles (2), the bottom of the insulating pull rod of each solid-sealed pole (2) is independently connected to a linkage plate (3), the linkage plate (3) is a horizontally arranged plate structure, and the three linkage plates (3) are linearly spaced and distributed on the same side of the main shaft (4).

4. A pole-mounted switch according to claim 3, characterized in that: The main shaft (4) is provided with three groups of holding mechanisms, each group of holding mechanisms is composed of two pull rod arms (5) spaced apart along the axial direction of the main shaft (4), and the holding portions (51) of the two pull rod arms (5) in the same group are aligned in the axial direction of the main shaft (4) and can synchronously abut against the same linkage plate (3) after rotation.

5. A pole-mounted switch according to claim 1, characterized in that: A reset mechanism is provided between the main shaft (4) and the switch base (1), and the reset mechanism can cause the main shaft (4) to automatically rotate in the opposite direction and reset after rotation.

6. A pole-mounted switch according to claim 5, characterized in that: The reset mechanism comprises a reset crank arm (6) fixedly mounted on the main shaft (4), a pulling column (12) arranged on the switch base (1), and a reset spring arranged between the reset crank arm (6) and the pulling column (12).

7. A pole-mounted switch according to claim 1, characterized in that: A gate opening indicator is arranged on the outer side wall of the pull rod.

8. The pole-mounted switch according to claim 1, characterized in that: The pull rod arm (5) is fixedly connected to the main shaft (4).

9. A pole-mounted switch according to claim 6, characterized in that: The reset crank arm (6) is fixedly connected to the main shaft (4).

Images