A vacuum contactor with a circulating water-cooling device

Abstract

This invention relates to the field of vacuum contactor technology, specifically to a vacuum contactor with a circulating water-cooling device, comprising multiple sets of vacuum contactor bodies and an arc-shaped cooling pipe disposed above the vacuum contactor body; the vacuum contactor body is bolted to a support base, and the arc-shaped cooling pipe is mounted on the support base via a positioning mechanism for heat dissipation and cooling of the top of the vacuum contactor body; the support base has two second cooling holes machined at its bottom, and straight cooling pipes are fixedly connected inside the second cooling holes for heat dissipation and cooling of the bottom of the vacuum contactor body; the bottom of the vacuum contactor body is basically sealed inside the support base, so a straight cooling pipe is used for heat dissipation, while the top of the vacuum contactor body is generally open, so an arc-shaped cooling pipe is used to dissipate heat from the top of the vacuum contactor body, resulting in uniform heat dissipation.

Description

Technical Field

[0001] This invention relates to the field of vacuum contactor technology, and more specifically to a vacuum contactor with a circulating water-cooling device. Background Technology

[0002] Vacuum contactors utilize a vacuum interrupter to extinguish arcs, frequently connecting and disconnecting normal operating currents. They are typically used for long-distance connection and disconnection of medium- and low-voltage AC motors that frequently start and stop. A vacuum contactor usually consists of an insulated frame, a metal base, a transmission crank arm, an electromagnetic system, auxiliary switches, and a vacuum switch tube. When the electromagnetic coil is energized with a control voltage, the armature drives the crank arm to rotate, closing the main contacts inside the vacuum switch tube. After the electromagnetic coil is de-energized, the main contacts open due to the action of the tripping spring. Vacuum contactors have strong arc-extinguishing capabilities, good voltage resistance, high operating frequency, long lifespan, no arc ejection, small size, light weight, and long maintenance cycles. The manufacturing process of the vacuum interrupter in a vacuum contactor requires high precision; if the process is flawed, the vacuum in the interrupter can easily drop. Poor contact material can lead to a "current-cutting overvoltage" phenomenon when interrupting current. This means that when interrupting current, due to the strong arc-extinguishing capability of the vacuum interrupter, the arc current does not naturally cross zero, but rather suddenly drops from a certain value to zero, resulting in a high overvoltage. Cut-off voltage can endanger the safe operation of electrical equipment.

[0003] Currently, vacuum contactors typically do not require cooling. It is sufficient to ensure that the temperature of the installation environment is not high and that ventilation is good. In this case, the heat generated inside the vacuum contactor through the contact resistance can be dissipated on its own. However, with the development of technology, the operating environment of vacuum contactors has changed. When vacuum contactors are used in high-temperature or humid environments, they cannot cool down in time, which can easily lead to contact oxidation or failure of mechanical parts.

[0004] A search revealed Chinese patent application number 202411368836.7, which discloses a vacuum contactor with a water-cooling mechanism. The cooling structure includes a shell formed by the mutual assembly of a first shell and a second shell. This shell is fitted over the ceramic body at the contact point of the vacuum interrupter chamber. A cooling cavity formed between the inner wall of the shell and the outer wall of the ceramic body at the contact point is divided into a spiral cooling cavity by a spiral partition. This invention utilizes the two combined shells to form a protective shell around the ceramic body at the contact point, creating a spiral cooling cavity for coolant injection between the shell and the ceramic body. After coolant injection, heat exchange and cooling occur, rapidly reducing the temperature at the contact point. Coolant cooling can be achieved through both immersion and atomized spraying. However, the aforementioned patent has the following drawbacks: immersion cooling and atomized spraying cooling both prevent water recycling and result in a humid installation environment for the vacuum contactor, affecting heat dissipation.

[0005] This application invention proposes a vacuum contactor with a circulating water-cooling device. Summary of the Invention

[0006] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a vacuum contactor with a circulating water cooling device, which can effectively solve the existing problems.

[0007] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a vacuum contactor with a circulating water-cooling device, comprising multiple sets of vacuum contactor bodies and an arc-shaped cooling pipe disposed above the vacuum contactor body; the vacuum contactor body is bolted to a support base, and the arc-shaped cooling pipe is mounted on the support base by a positioning mechanism for heat dissipation and cooling of the top of the vacuum contactor body; the support base has two second cooling holes machined at its bottom, and a straight cooling pipe is fixedly connected inside the second cooling holes for heat dissipation and cooling of the bottom of the vacuum contactor body.

[0008] Furthermore, the arc-shaped cooling pipe includes an arched pipe in the middle section and connecting pipes in two edge sections.

[0009] Furthermore, the arched pipe in the middle section is made of flexible tubing, while the connecting pipes at the two edge ends are made of rigid tubing.

[0010] Furthermore, the top of the support base is machined with two first cooling holes, and the top of the connecting pipe is machined with a limiting hole.

[0011] Furthermore, the positioning mechanism includes a positioning base fixed inside the first cooling hole, a through connecting rod fixedly connected to one end of the positioning base, the through connecting rod fixed inside the limiting hole, a base connecting rod fixedly connected to the bottom of the through connecting rod, a zigzag connecting rod connected to one end of the base connecting rod via a hinge, and a stop connecting rod connected to one end of the zigzag connecting rod via a hinge.

[0012] Furthermore, the basic connecting rod, the zigzag connecting rod, and the abutting connecting rod are all located inside the arc-shaped cooling pipe. An abutting block is fixedly connected between the two abutting connecting rods located inside the same arc-shaped cooling pipe, and the top of the abutting block is fixedly connected to the inside of the arc-shaped pipe.

[0013] Furthermore, the zigzag connecting rod consists of two connecting rods that are hinged together to maintain the curvature of the arched pipe.

[0014] Furthermore, a connecting valve is fixedly connected between adjacent arc-shaped cooling pipes, and the connecting valve is fixed to the bearing base by an I-beam frame.

[0015] Furthermore, the two arc-shaped cooling pipes are located at the head and tail of the vacuum contactor body, respectively; the zigzag connecting rod and the abutting connecting rod support the curvature of the arc-shaped pipes. Beneficial effects

[0016] The technical solution provided by this invention has the following advantages compared with known public technologies: The bottom of the vacuum contactor body is basically sealed inside the support base, so a straight cooling pipe is used to dissipate heat. The top of the vacuum contactor body is generally open, so an arc-shaped cooling pipe is used to dissipate heat from the top of the vacuum contactor body, making the heat dissipation effect more uniform. The arc-shaped cooling pipe is rotated by rotating the positioning base, so that the arc-shaped cooling pipe and the positioning mechanism as a whole rotate along the central axis of the first cooling hole, thereby exposing the vacuum contactor body for easy maintenance. A connecting rod is installed on one side of the mounting base of the vacuum contactor body, so that the connecting rod abuts against the lower middle of the arched pipe, ensuring that the height of the arched pipe remains unchanged. Then, the positioning base is rotated in the opposite direction, causing the arc-shaped cooling pipe to move towards the middle position of the vacuum contactor body. At this time, since the height of the arched pipe remains unchanged, and since the arched pipe is a flexible tube, the tortuous connecting rod inside the arched pipe and the abutting connecting rod rotate. This ensures that when the arc-shaped cooling pipe is close to the middle position of the vacuum contactor body, its approximate arc height remains unchanged, and it will not contact the vacuum contactor body. This also ensures a uniform heat dissipation and cooling effect, improving the practicality of the device. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the vacuum contactor with a circulating water-cooling device according to the present invention. Figure 2 This is a schematic diagram of the back structure of the vacuum contactor with a circulating water-cooling device according to the present invention; Figure 3 This is a schematic diagram of the structure of a single vacuum contactor body of the vacuum contactor with a circulating water-cooling device according to the present invention; Figure 4 This is a schematic diagram of the exploded structure of a single vacuum contactor body of the vacuum contactor with a circulating water-cooling device according to the present invention. Figure 5 This is a schematic diagram of the positioning mechanism of the vacuum contactor of the circulating water-cooled device of the present invention; Figure 6 This is a schematic diagram of the cross-sectional structure of the arc-shaped cooling pipe of the vacuum contactor with the circulating water cooling equipment of the present invention.

[0019] Attached Figure

[0020] 100 - Vacuum contactor body; 101 - Support base; 102 - Connecting valve; 103 - First cooling hole; 104 - Second cooling hole; 200 - Arc-shaped cooling pipe; 201 - Arched pipe; 202 - Connecting pipe; 203 - Limiting hole; 300-Linear cooling pipe; 400 - Positioning mechanism; 401 - Positioning base; 402 - Through-link; 403 - Basic link; 404 - Bending link; 405 - Holding link; 406 - Holding block. Detailed Implementation

[0021] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0022] It should also be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other.

[0023] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.

[0024] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0025] This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] The present invention will be further described below with reference to embodiments. Example

[0027] A vacuum contactor with a circulating water-cooling device, such as Figures 1-6 As shown; The vacuum contactor body 100 is cylindrical in shape. Therefore, to achieve better cooling effect when dissipating heat in its installation environment, it is subjected to circumferential cooling. Specifically, this includes multiple sets of vacuum contactor bodies 100 and an arc-shaped cooling pipe 200 disposed above the vacuum contactor body 100 for heat dissipation and cooling of the top of the vacuum contactor body 100. The vacuum contactor body 100 is bolted to the support base 101. The arc-shaped cooling pipe 200 is mounted on the support base 101 via a positioning mechanism 400. The support base 101 has two second cooling holes 104 machined at its bottom. A straight cooling pipe 300 is fixedly connected inside the second cooling hole 104 for heat dissipation and cooling of the bottom of the vacuum contactor body 100. Both the arc-shaped cooling pipe 200 and the straight cooling pipe 300 are connected to an external water source. It is worth noting that the vacuum contactor... Generally, it consists of three vacuum contactor bodies 100. Each vacuum contactor body 100 needs to be cooled individually. A straight cooling pipe 300 runs through the three support bases 101, thereby cooling the installation environment from the bottom of the vacuum contactor body 100. The arc-shaped cooling pipe 200 uses its arc shape to uniformly cool the upper part of the vacuum contactor body 100. In actual use, since the bottom of the vacuum contactor body 100 is basically sealed inside the support base 101, a straight cooling pipe 300 is used for cooling. The cooling of the bottom of the vacuum contactor body 100 is not related to the straightness or curvature of the pipe. The space at the top of the vacuum contactor body 100 is generally open, so an arc-shaped cooling pipe 200 is used to cool the top of the vacuum contactor body 100, making the cooling effect more uniform.

[0028] Furthermore, to ensure the arc shape of the arc-shaped cooling pipe 200 and to facilitate subsequent maintenance of the vacuum contactor body 100, the arc-shaped cooling pipe 200 includes an arched pipe 201 in the middle section and connecting pipes 202 at the edges. It is worth noting that the arched pipe 201 in the middle section uses a flexible hose, while the connecting pipes 202 at the two edges use rigid pipes. The top of the bearing base 101 is machined with two first cooling holes 103, and the top of the connecting pipes 202 is machined with limiting holes 203. The positioning mechanism 400 includes a positioning base 401 fixed inside the first cooling holes 103. A through-link 402 is fixedly connected to one end of the curved cooling pipe 200. The through-link 402 is fixed inside the limiting hole 203. A base link 403 is fixedly connected to the bottom of the through-link 402. A bend link 404 is hinged to one end of the base link 403. A stop link 405 is hinged to one end of the bend link 404. The base link 403, bend link 404, and stop link 405 are all located inside the curved cooling pipe 200. A stop block 406 is fixedly connected between two stop links 405 located inside the same curved cooling pipe 200. The top of the stop block 406 is fixedly connected to the inside of the arched pipe 201. Figure 6 As shown, it should be noted that the tortuous connecting rod 404 consists of multiple connecting rods connected to each other by hinges, used to maintain the curvature of the arched pipe 201. In this invention, the preferred number of connecting rods in the tortuous connecting rod 404 is two. The number of connecting rods can be determined according to the bending angle of the arched pipe 201. A connecting valve 102 is fixedly connected between adjacent arc-shaped cooling pipes 200. Specifically, the connecting valve 102 can be fixed on the bearing base 101 or on the wall in the vacuum contactor installation environment to ensure that the connecting valve 102 is fixed, thereby facilitating the rotation of the positioning mechanism 400 to adjust the position of the arc-shaped cooling pipe 200. The usage of the positioning mechanism 400 and the arc-shaped cooling pipe 200 in this invention is as follows: Generally, the two arc-shaped cooling pipes 200 are located at the head and tail of the vacuum contactor body 100, respectively. The curvature of the arched pipe 201 is determined by the bending connecting rod 404 and the abutting connecting rod 405, and remains unchanged. However, in actual use, due to the need for maintenance of the vacuum contactor body 100, the arc-shaped cooling pipes 200 above the vacuum contactor body 100 need to be removed to expose the vacuum contactor body 100, which is troublesome and time-consuming. Therefore, the positioning mechanism 400 is used to position the arc-shaped cooling pipes 200. Simultaneously, the arc-shaped cooling pipe 200 can be rotated by rotating the positioning base 401, thereby causing the arc-shaped cooling pipe 200 and the positioning mechanism 400 to rotate along the central axis of the first cooling hole 103, thus positioning the vacuum contactor body 100. The exposed design facilitates maintenance and repair. To ensure the arc-shaped cooling pipe 200 effectively cools the vacuum contactor body 100 near its center, operators simply install a connecting rod on one side of the mounting base of the vacuum contactor body 100, ensuring the connecting rod rests against the lower center of the arc-shaped pipe 201, maintaining its height. Then, the positioning base 401 is rotated in the opposite direction, moving the arc-shaped cooling pipe 200 towards the center of the vacuum contactor body 100. Since the height of the arc-shaped pipe 201 remains constant, and because it is a flexible hose, the internal bending connecting rod 404 and the abutting connecting rod 405 rotate. This ensures that the arc-shaped cooling pipe 200 maintains its approximate arc height near the center of the vacuum contactor body 100, preventing contact with the vacuum contactor body 100 and guaranteeing uniform cooling, thus improving the device's practicality.

[0029] In this embodiment, the preferred method for using the connecting valve 102 is to mount it onto the support base 101 via an I-beam frame. This facilitates the formation of a single unit during production. This unit consists of three vacuum contactor bodies 100 with three support bases 101. Each vacuum contactor body 100 has two through-type straight cooling pipes 300 at its bottom. Each vacuum contactor body 100 has two arc-shaped cooling pipes 200 at its top. Two adjacent arc-shaped cooling pipes 200 on the same side are fixed together by the connecting valve 102. During installation, the operator places the support base 101 in the designated position and then... Pipe 300 and arc-shaped cooling pipe 200 are connected to an external circulating water source. Normally, the two arc-shaped cooling pipes 200 are located at the head and tail of the vacuum contactor body 100, respectively. The curvature of the arched pipe 201 is determined by the bending connecting rod 404 and the abutting connecting rod 405, and remains unchanged. However, in actual use, due to the need for maintenance of the vacuum contactor body 100, the arc-shaped cooling pipes 200 above the vacuum contactor body 100 need to be removed to expose the vacuum contactor body 100. This process is troublesome and time-consuming; therefore, a positioning mechanism 400 is used to address this issue. The arc-shaped cooling pipe 200 is positioned, and the arc-shaped cooling pipe 200 can be rotated by rotating the positioning base 401. This allows the arc-shaped cooling pipe 200 and the positioning mechanism 400 to rotate as a whole along the central axis of the first cooling hole 103, thereby exposing the vacuum contactor body 100 for easy maintenance. To ensure that the arc-shaped cooling pipe 200 can effectively cool the vacuum contactor body 100 near its center, the operator only needs to install a connecting rod on one side of the mounting base of the vacuum contactor body 100, with the connecting rod abutting against the lower center of the arc-shaped pipe 201 to ensure the arc... The height of pipe 201 remains unchanged, and then the positioning base 401 is rotated in the opposite direction, causing the arc-shaped cooling pipe 200 to move towards the middle position of the vacuum contactor body 100. At this time, since the height of the arc-shaped pipe 201 remains unchanged, and since the arc-shaped pipe 201 is a flexible tube, the tortuous connecting rod 404 and the abutting connecting rod 405 inside the arc-shaped pipe 201 rotate, so that when the arc-shaped cooling pipe 200 is close to the middle position of the vacuum contactor body 100, its general arc height remains unchanged, and it will not contact the vacuum contactor body 100, thus ensuring uniform heat dissipation and cooling effect and improving the practicality of the device.

[0030] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A vacuum contactor with a circulating water-cooling device, characterized in that, It includes multiple sets of vacuum contactor bodies (100) and an arc-shaped cooling pipe (200) disposed above the vacuum contactor body (100). The vacuum contactor body (100) is bolted to the support base (101). The arc-shaped cooling pipe (200) is mounted on the support base (101) through the positioning mechanism (400) for heat dissipation and cooling of the top of the vacuum contactor body (100). The support base (101) has two second cooling holes (104) machined at the bottom. A straight cooling pipe (300) is fixedly connected inside the second cooling hole (104) for heat dissipation and cooling of the bottom of the vacuum contactor body (100). The arc-shaped cooling pipe (200) includes an arched pipe (201) in the middle section and connecting pipes (202) at two edge sections. The arched pipe (201) in the middle section is made of flexible hose, and the connecting pipe (202) at both edge ends is made of rigid pipe; The top of the support base (101) has two first cooling holes (103), and the top of the connecting pipe (202) has a limiting hole (203). The positioning mechanism (400) includes a positioning base (401) fixed inside the first cooling hole (103). One end of the positioning base (401) is fixedly connected to a through connecting rod (402). The through connecting rod (402) is fixed inside the limiting hole (203). The bottom of the through connecting rod (402) is fixedly connected to a base connecting rod (403). One end of the base connecting rod (403) is connected to a zigzag connecting rod (404) via a hinge. One end of the zigzag connecting rod (404) is connected to an abutting connecting rod (405) via a hinge.

2. A vacuum contactor having a circulating water cooling device according to claim 1, wherein The basic connecting rod (403), the zigzag connecting rod (404), and the abutting connecting rod (405) are all located inside the arc-shaped cooling pipe (200). An abutting block (406) is fixedly connected between two abutting connecting rods (405) located inside the same arc-shaped cooling pipe (200). The top of the abutting block (406) is fixedly connected to the inside of the arched pipe (201).

3. A vacuum contactor having a water cooling device according to claim 2, wherein The zigzag link (404) consists of two links connected by a hinge to each other, used to maintain the curvature of the arched pipe (201).

4. A vacuum contactor with a circulating water-cooling device according to claim 3, characterized in that, A connecting valve (102) is fixedly connected between adjacent arc-shaped cooling pipes (200), and the connecting valve (102) is fixed on the bearing base (101) by an I-beam frame.

5. A vacuum contactor with a circulating water-cooling device according to claim 4, characterized in that, An arc-shaped cooling pipe (200) is provided at the head and tail of the vacuum contactor body (100). The zigzag link (404) and the abutting link (405) support the curvature of the arched pipe (201).

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