A vacuum circuit breaker for protecting and controlling power distribution system

Abstract

The invention discloses a vacuum circuit breaker for protecting and controlling a power distribution system, and relates to the technical field of vacuum circuit breakers. The invention comprises the following steps: a first piston is slidably installed in a first cylinder to control a first contact to move up and down in a vacuum chamber; a second piston is slidably installed in a second cylinder to control a second contact to move up and down in the vacuum chamber; an energy storage unit is coordinated to control a sleeve to move left and right relative to an inner cylinder; and with the help of a connection through a pipe and the flow of insulating oil, the movement of the first contact and the second contact in the vacuum chamber can be synchronously controlled, so that the first contact and the second contact can be more efficiently contacted or separated, which is beneficial to improving the efficiency of circuit connection and interruption. At the same time, the relative movement of the first contact and the second contact is controlled with the help of the flow of insulating oil, so that the control is more direct and coherent, not easy to be interrupted, which is beneficial to improving the stability of the device during long-term use and extending the service life of the device.

Description

Technical Field

[0001] The present invention relates to the field of vacuum circuit breakers, and in particular to a vacuum circuit breaker for protecting and controlling a power distribution system. Background Art

[0002] A vacuum circuit breaker is a distribution device installed in a power distribution system for protecting and controlling circuits. During operation, the arc extinguishing medium of the vacuum circuit breaker and the insulating medium in the contact gap after arc extinguishing are both in a high vacuum environment. Therefore, the arc can be effectively extinguished after the contacts are separated, which is beneficial to ensuring the stability and safety of circuit on / off control.

[0003] When controlling the movement of contacts, vacuum circuit breakers in the prior art usually use a mechanical transmission structure to achieve power transmission. With the help of the connection of transmission levers in various directions, the power provided by the energy storage unit is transmitted to the contacts to control the movement of the contacts in the vacuum chamber. After a long period of high-frequency circuit opening and closing control, the high-frequency movement between the levers makes the connection positions between the levers easily worn, thereby interfering with the power transmission and affecting the stability of the vacuum circuit breaker after long-term high-frequency opening and closing control. In addition, due to the limitation of mechanical transmission, the movement of contacts on one side can usually be controlled in vacuum circuit breakers in the prior art, which makes the distance between the two contacts after separation and the efficiency of separation and closing easily limited.

[0004] Therefore, a vacuum circuit breaker for protecting and controlling a power distribution system is proposed to solve the above problems in the prior art. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art that vacuum circuit breakers use mechanical structure transmission, which is easily affected by wear and tear and the shortcomings that only one side of the contact can be controlled to move, which is easy to affect the separation and closing efficiency between the two contacts. A vacuum circuit breaker for protecting and controlling a power distribution system is proposed to solve the shortcomings of the prior art that vacuum circuit breakers use mechanical structure transmission, which is easily affected by wear and tear and the shortcomings that only one side of the contact can be controlled to move, which is easy to affect the separation and closing efficiency between the two contacts.

[0006] In order to solve the problems existing in the prior art, the present invention adopts the following technical solutions:

[0007] A vacuum circuit breaker for protecting and controlling a power distribution system comprises a base, a plurality of first cylinders and second cylinders symmetrically arranged in an upper and lower direction are installed at the rear of the top of the base, a first plug arranged longitudinally is fixedly installed on the back of the first cylinder, a second plug arranged longitudinally is fixedly installed on the back of the second cylinder, a vacuum chamber is installed inside the connection position of the first cylinder and the second cylinder, a first contact extending into the first cylinder is slidably inserted at the upper part of the interior of the vacuum chamber, and a first conductive ring electrically connected to the first plug is movably sleeved at the outer side of the first contact, a first piston slidably installed in the first cylinder is fixed at the top of the first contact, a plug rod extending into the second cylinder is slidably inserted at the lower part of the interior of the vacuum chamber, and the upper end of the plug rod is connected to a plug rod arranged in the first contact. A second contact is directly below, and the outer side of the plug rod is movably sleeved with a second conductive ring electrically connected to the second plug, the bottom end of the plug rod is fixed with a second piston slidably installed in the second cylinder, a control box is fixedly installed on the top front of the base, and a control panel is fixedly installed on the front of the control box, a vertically arranged through-tube is connected between the upper end of the first cylinder and the lower end of the second cylinder, an inner cylinder arranged below the second cylinder is fixedly installed in the base, and the left end of the inner cylinder is connected to the through-tube, a sleeve is movably sleeved on the outer side of the right end of the inner cylinder, and a horizontally arranged rack rod is fixedly installed on the front end wall of the sleeve, a gear meshing with the rack rod is rotatably installed in the control box, an energy storage unit connected to the gear transmission is fixedly installed in the control box, and insulating oil is poured into the through-tube and the inner cylinder.

[0008] Preferably, the second contact is slidably inserted in the insertion rod, and the outer movable sleeve of the second contact is provided with a spring arranged in the vacuum chamber, and the spring is elastically supported between the insertion rod and the second contact.

[0009] Preferably, sealing rings are installed at the sliding connection position between the first contact and the vacuum chamber, and at the sliding connection position between the insertion rod and the vacuum chamber.

[0010] Preferably, the cylindrical surface at the lower end of the first cylinder and the cylindrical surface at the upper end of the second cylinder are provided with matching external threads, and a main screw sleeve is threadedly connected between the first cylinder and the second cylinder.

[0011] Preferably, the interior of the lower end of the first cylinder and the interior of the upper end of the second cylinder are tightly filled with an insulating rubber sleeve wrapped around the outer side of the vacuum chamber.

[0012] Preferably, the lower outer side of the first cylinder is threadedly sleeved with a first auxiliary screw sleeve arranged above the main screw sleeve, and the upper outer side of the second cylinder is threadedly sleeved with a second auxiliary screw sleeve arranged below the main screw sleeve.

[0013] Preferably, the lower opening of the first cylinder and the upper opening of the second cylinder are provided with notches that fit each other, and the first cylinder and the second cylinder are assembled up and down to form a vertical cylindrical structure.

[0014] Preferably, each through pipe and the sleeve are connected by a connecting pipe, and a valve is fixedly installed in the connecting pipe.

[0015] Preferably, the insulating oil has excellent thermal conductivity, a pump and a heat exchanger are fixedly installed on the top of the control box, a first connecting pipe is connected between the through pipe and the water inlet of the pump, the water outlet of the pump is connected to the heat exchanger, and a second connecting pipe is connected between the heat exchanger and the through pipe.

[0016] Preferably, a vertically arranged partition is fixedly installed inside the through pipe, and the interior of the through pipe is divided into two vertical flow channels by the partition. The upper and lower ends of the two flow channels are respectively connected to the top of the first cylinder and the bottom of the second cylinder. The connecting pipe and the first connecting pipe are directly connected to one of the flow channels, and the second connecting pipe is directly connected to the other flow channel.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. In the present invention, by slidingly installing the first piston in the first cylinder to control the first contact to move up and down in the vacuum chamber, and slidingly installing the second piston in the second cylinder to control the second contact to move up and down in the vacuum chamber, the energy storage unit controls the sleeve to move left and right relative to the inner cylinder, and the through pipe is connected. Under the flow of the filled insulating oil, the movement of the first contact and the second contact in the vacuum chamber can be synchronously controlled, so that the first contact and the second contact can be more efficiently contacted or separated in the vacuum chamber, which is conducive to improving the efficiency of circuit connection and interruption. At the same time, the relative movement of the first contact and the second contact is controlled by means of the flow of the insulating oil, so that the control is more direct and coherent, and the power applied to control is not easily interrupted due to accidents and wear during the transmission process, which is conducive to improving the stability of the device during long-term use and extending the service life of the device;

[0019] 2. In the present invention, by sliding the second contact into the insertion rod and elastically supporting the spring between the insertion rod and the second contact, the second contact can elastically slide relative to the insertion rod. When the first contact and the second contact are close to each other for circuit connection, the second contact will arrive at the center of the vacuum chamber before the first contact, so that the ends of the first contact and the second contact can fit more closely, which is conducive to ensuring the stability of the circuit connection of the device;

[0020] 3. In the present invention, by assembling the external thread on the end cylindrical surface of the first cylinder and the second cylinder close to each other, and sleeve the main screw sleeve on the first cylinder and the second cylinder, the first cylinder and the second cylinder can be connected through the main screw sleeve, so that the first cylinder and the second cylinder can be quickly disassembled and assembled. By disassembling the first cylinder and the second cylinder, it is convenient to replace the internal structure of the first cylinder and the second cylinder, which improves the convenience of operation during the inspection and maintenance of the device to a certain extent;

[0021] 4. In the present invention, the first auxiliary screw sleeve is screwed to the outside of the lower end of the first cylinder and is located above the main screw sleeve, and the second auxiliary screw sleeve is screwed to the outside of the upper end of the second cylinder and is located below the main screw sleeve. This allows the first auxiliary screw sleeve and the second auxiliary screw sleeve to be respectively pressed against the upper and lower sides of the main screw sleeve when the main screw sleeve is screwed between the first cylinder and the second cylinder, thereby stably limiting the position of the main screw sleeve. At the same time, by setting mutually adapted notches at the connection between the first cylinder and the second cylinder, the first cylinder and the second cylinder are accurately and stably connected when docking, and no deviation occurs. Under mutual cooperation, the firm stability of the device connecting the first cylinder and the second cylinder with the help of the main screw sleeve can be effectively improved;

[0022] 5. In the present invention, each through-tube is connected between the upper end of the first cylinder and the lower end of the second cylinder corresponding to the upper and lower parts, and a connecting tube is connected between each through-tube and the sleeve, and the valve installed in the connecting tube can be used to control the opening and closing of each connecting tube. When the valve is closed, the corresponding first contact and second contact are in an uncontrollable state, so that the device can flexibly control the circuit that needs vacuum breaking according to actual use requirements, which improves the flexibility of the device in actual use to a certain extent;

[0023] 6. In the present invention, since the insulating oil filled in the upper end of the first cylinder and the lower end of the second cylinder has excellent thermal conductivity, the heat generated when the first contact and the second contact in the vacuum chamber are connected and energized can be quickly discharged outward through the insulating oil, avoiding overheating and damage of the device, which is beneficial to improving the stability of the device during actual use. At the same time, the through pipe is divided into two flow channels by the partition, and the pumping of the pump and the heat exchange and heat dissipation in the heat exchanger can effectively improve the efficiency of the device in heat dissipation through the flow of insulating oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0025] Figure 1 It is a stereoscopic diagram of the present invention from the front perspective;

[0026] Figure 2 It is a three-dimensional image of the present invention from the back side perspective;

[0027] Figure 3 It is a three-dimensional diagram of the structure on the base of the present invention;

[0028] Figure 4 It is a stereoscopic diagram of the main screw sleeve of the present invention after being disassembled from the first cylinder body and the second cylinder body;

[0029] Figure 5 It is a cross-sectional view of the first cylinder and the second cylinder of the present invention;

[0030] Figure 6 This is a disassembled diagram of the plug rod and the second contact of the present invention;

[0031] Figure 7 A top view of the present invention;

[0032] Figure 8 For the present invention Figure 7 Sectional view at AA in the middle;

[0033] Fig. 9 For the present invention Figure 7 Sectional view at the middle BB;

[0034] Fig.10 For the present invention Figure 7 Sectional view at CC;

[0035] Fig.11 It is a left side view of the present invention;

[0036] Fig.12 For the present invention Fig.11 Sectional view at DD in the middle;

[0037] Fig.13 For the present invention Fig.11 Cross-sectional view at EE.

[0038] Serial number in the picture:

[0039] 1. Base;

[0040] 2. first cylinder; 201. second cylinder; 202. first plug; 203. second plug;

[0041] 3. Vacuum chamber; 301. First contact; 302. First conductive ring; 303. First piston; 304. Insertion rod; 305. Second contact; 306. Spring; 307. Second conductive ring; 308. Second piston; 309. Sealing ring;

[0042] 4. Main screw sleeve; 401. Insulating rubber sleeve; 402. First auxiliary screw sleeve; 403. Second auxiliary screw sleeve; 404. Notch;

[0043] 5. Control box; 501. Control panel;

[0044] 6. Through pipe; 601. Connecting pipe; 602. Valve;

[0045] 7, inner cylinder; 701, sleeve; 702, rack rod; 703, gear;

[0046] 8. Energy storage unit;

[0047] 9. Pump; 901. Heat exchanger; 902. First connecting pipe; 903. Second connecting pipe; 904. Partition. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0049] Embodiment: This embodiment provides a vacuum circuit breaker for protecting and controlling a power distribution system, see Figure 1 - Fig.13Specifically, it includes a base 1, and a plurality of first cylinders 2 and second cylinders 201 symmetrically arranged in an upper and lower direction are installed at the top rear of the base 1, a first plug 202 arranged longitudinally is fixedly installed on the back of the first cylinder 2, and a second plug 203 arranged longitudinally is fixedly installed on the back of the second cylinder 201, and a vacuum chamber 3 is installed inside the connection position between the first cylinder 2 and the second cylinder 201, a first contact 301 extending into the first cylinder 2 is slidably inserted on the upper part of the vacuum chamber 3, and a first conductive ring 302 electrically connected to the first plug 202 is movably sleeved on the outer side of the first contact 301, a first piston 303 slidably installed in the first cylinder 2 is fixed at the top of the first contact 301, and a plug rod 304 extending into the second cylinder 201 is slidably inserted at the lower part of the vacuum chamber 3, and the upper end of the plug rod 304 is connected to a second contact 305 arranged directly below the first contact 301, A second conductive ring 307 electrically connected to the second plug 203 is movably sleeved on the outer side of the plug rod 304, a second piston 308 slidably installed in the second cylinder 201 is fixed at the bottom end of the plug rod 304, a control box 5 is fixedly installed on the top front of the base 1, and a control panel 501 is fixedly installed on the front of the control box 5, a vertically arranged through pipe 6 is connected between the upper end of the first cylinder 2 and the lower end of the second cylinder 201, an inner cylinder 7 arranged below the second cylinder 201 is fixedly installed in the base 1, and the left end of the inner cylinder 7 is connected to the through pipe 6, a sleeve 701 is movably sleeved on the outer side of the right end of the inner cylinder 7, and a horizontally arranged rack rod 702 is fixedly installed on the front end wall of the sleeve 701, a gear 703 meshing with the rack rod 702 is rotatably installed in the control box 5, an energy storage unit 8 transmission-connected to the gear 703 is fixedly installed in the control box 5, and insulating oil is poured into the through pipe 6 and the inner cylinder 7.

[0050] During the use of the device, the staff connects the device to a circuit, in which connectors corresponding to the first plug 202 and the second plug 203 are provided. When the device is not connected, the two connectors in the circuit are in an open circuit state. When the device is connected to the circuit, the device is moved horizontally and pushed into the access circuit, so that the first plug 202 and the second plug 203 are respectively plugged into the two connectors in the circuit. After the device is activated, the staff drives the energy storage unit 8 to store energy to provide power for the rotation of the gear 703. Under the power supply of the energy storage unit 8, the gear 703 can be controlled to rotate forward and reverse. Subsequently, the staff can control the device to connect and interrupt the circuit through the control panel 501. When the device needs to be used to connect the circuit, the staff presses the control panel 501 to control the energy storage unit 8 to provide power for the rotation of the gear 703. With the meshing between the gear 703 and the rack rod 702, the rack rod 702 is driven to drive the sleeve 701 to move left. When the sleeve 701 moves left relative to the inner cylinder 7, the inner cylinder 703 is pressed against the inner cylinder 7. The insulating oil stored in the sleeve 701 is squeezed, and the insulating oil in the inner cylinder 7 enters from the top of the first cylinder 2 and the bottom of the second cylinder 201 synchronously under the connection of the through pipe 6. Under the push formed by the entry of the insulating oil, the first piston 303 is driven to move from top to bottom in the first cylinder 2. During the downward movement of the first piston 303, the first contact 301 is driven to move downward, so that the first contact 301 moves downward in the vacuum chamber 3, and the second piston 308 is driven to move from bottom to top in the second cylinder 201. The second piston 308 moves upward, and the rod 304 moves upward. The rod 304 drives the second contact 305 to move upward in the vacuum chamber 3. The first contact 301 and the second contact 305 move relatively in the vacuum chamber 3, and the ends fit each other. At this time, the power at the first plug 202 forms a path through the connection of the first conductive ring 302, the first contact 301, the second contact 305, the rod 304, the second conductive ring 307 and the second plug 203, and connects the circuit that was originally broken.

[0051] When the device is needed to control the circuit interruption, the staff presses the control panel 501 to control the energy storage unit 8 to provide reverse power for the rotation of the gear 703, driving the gear 703 to rotate in the opposite direction. With the meshing between the gear 703 and the rack rod 702, the rack rod 702 drives the sleeve 701 to move to the right. When the sleeve 701 moves to the right relative to the inner cylinder 7, the space for storing insulating oil between the inner cylinder 7 and the sleeve 701 increases. Under the connection of the through pipe 6, the top of the first cylinder 2 and the second cylinder 201 The insulating oil at the bottom flows back into the inner cylinder 7 and the sleeve 701. With the help of the backflow of the insulating oil, the first piston 303 moves upward in the first cylinder 2. Synchronously, the second piston 308 moves downward in the first cylinder 2, thereby driving the first contact 301 and the second contact 305 to move away from each other synchronously in the vacuum chamber 3, thereby realizing the interruption of the circuit. Since the vacuum chamber 3 is in a vacuum state, when the ends of the first contact 301 and the second contact 305 are separated, the arc can be effectively extinguished, thereby realizing the stable interruption of the circuit.

[0052] When the device is used for protection and control in a power distribution system, the first piston 303 is slidably installed in the first cylinder 2 to control the first contact 301 to move up and down in the vacuum chamber 3, and the second piston 308 is slidably installed in the second cylinder 201 to control the spring 306 to move up and down in the vacuum chamber 3. The energy storage unit 8 controls the sleeve 701 to move left and right relative to the inner cylinder 7, and the through pipe 6 is connected. Under the flow of filled insulating oil, the movement of the first contact 301 and the second contact 305 in the vacuum chamber 3 can be synchronously controlled. The first contact 301 and the second contact 305 synchronously approach each other in the vacuum chamber 3 to connect the power path, and the first contact 301 and the second contact 305 synchronously move away from each other in the vacuum chamber 3 to center the power path. In the same reaction time, the first contact 301 and the second contact 305 can be more efficiently contacted or separated in the vacuum chamber 3. The synchronous movement of the end columns on both sides makes the connection and interruption of the circuit more efficient compared with the mode in which only one-side end column movement exists in the traditional vacuum circuit breaker. In addition, in the same reaction time, the separation distance between the two end columns can be set longer, which is beneficial to further ensure the stability of the circuit being separated and interrupted by the first contact 301 and the second contact 305 in the vacuum chamber 3. In the device, the relative movement of the first contact 301 and the second contact 305 is controlled by the flow of insulating oil, which makes the control more direct and coherent. The power applied for control is not easily interrupted by accidents during the transmission process, which is beneficial to improve the stability of the device during actual use.

[0053] In the specific implementation process, Figure 5 , Figure 8 and Fig. 9As shown, the second contact 305 is slidably inserted in the insertion rod 304, and the outer movable sleeve of the second contact 305 is provided with a spring 306 arranged in the vacuum chamber 3, and the spring 306 is elastically supported between the insertion rod 304 and the second contact 305, and the sliding connection position of the first contact 301 and the vacuum chamber 3, as well as the sliding connection position of the insertion rod 304 and the vacuum chamber 3 are both installed with sealing rings 309.

[0054] During the use of the device, since the second contact 305 is slidably inserted into the insertion rod 304, and the second contact 305 and the insertion rod 304 are elastically supported by the spring 306, the second contact 305 can elastically slide relative to the insertion rod 304. When the circuit is interrupted, with the help of the elastic support of the spring 306, the end of the second contact 305 is closer to the center position of the vacuum chamber 3 than the end of the first contact 301, so that the first contact 301 and the second contact 305 are close to each other. When the circuit is connected, the second contact 305 will arrive at the center position of the vacuum chamber 3 before the first contact 301. After the subsequent approaching action is completed, the second contact 305 will overcome the elastic support of the spring 306 and go deeper into the insertion rod 304, so that the ends of the first contact 301 and the second contact 305 can fit more closely, which is beneficial to ensuring the stability of the circuit connection of the device. By installing the sealing ring 309 at the connection between the first contact 301 and the vacuum chamber 3, and at the connection between the insertion rod 304 and the vacuum chamber 3, the sealing tightness of the first contact 301 and the insertion rod 304 when sliding relative to the vacuum chamber 3 can be guaranteed, which is beneficial to ensuring that the vacuum environment in the vacuum chamber 3 remains stable for a long time.

[0055] In the specific implementation process, Figure 4 and Figure 5 As shown, matching external threads are provided on the cylindrical surface at the lower end of the first cylinder 2 and the cylindrical surface at the upper end of the second cylinder 201, a main screw sleeve 4 is threadedly connected between the first cylinder 2 and the second cylinder 201, the lower end interior of the first cylinder 2 and the upper end interior of the second cylinder 201 are tightly filled with an insulating rubber sleeve 401 wrapped around the outside of the vacuum chamber 3, the lower end outer side of the first cylinder 2 is threadedly sleeved with a first auxiliary screw sleeve 402 arranged above the main screw sleeve 4, the upper end outer side of the second cylinder 201 is threadedly sleeved with a second auxiliary screw sleeve 403 arranged below the main screw sleeve 4, the lower end opening of the first cylinder 2 and the upper end opening of the second cylinder 201 are provided with mutually matching notches 404, and the first cylinder 2 and the second cylinder 201 are assembled from top to bottom to form a vertical cylindrical structure.

[0056] During the use of the device, since matching external threads are assembled on the end cylindrical surfaces of the first barrel 2 and the second barrel 201 that are close to each other, and the main screw sleeve 4 is sleeved on the first barrel 2 and the second barrel 201, the first barrel 2 and the second barrel 201 can be connected through the main screw sleeve 4, so that the first barrel 2 and the second barrel 201 can be quickly disassembled and assembled. By disassembling the first barrel 2 and the second barrel 201, it is convenient to replace the internal structures of the first barrel 2 and the second barrel 201, which improves the operational convenience of the device during inspection and maintenance to a certain extent. At the same time, by filling the insulating rubber sleeve 401 at the ends of the first barrel 2 and the second barrel 201 and wrapping it on the outside of the vacuum chamber 3, the vacuum chamber 3 can be tightly and stably installed at the connecting position between the first barrel 2 and the second barrel 201, which is conducive to improving the stability and safety of the vacuum chamber 3 installed in the first barrel 2 and the second barrel 201.

[0057] When the device is in use, since the first auxiliary screw sleeve 402 is threadedly screwed on the outer side of the lower end of the first barrel 2 and is above the main screw sleeve 4, and the second auxiliary screw sleeve 403 is threadedly screwed on the outer side of the upper end of the second barrel 201 and is below the main screw sleeve 4, when the main screw sleeve 4 is threadedly screwed between the first barrel 2 and the second barrel 201, the first auxiliary screw sleeve 402 can be pressed against the top of the main screw sleeve 4, and the second auxiliary screw sleeve 403 can be pressed against the bottom of the main screw sleeve 4, thereby stably restricting the position of the main screw sleeve 4. Moreover, since the connection between the first barrel 2 and the second barrel 201 is provided with mutually adapted notches 404, the first barrel 2 and the second barrel 201 can be accurately and stably connected when docking, and no deviation will occur. Under the cooperation with each other, the firmness and stability of the device connecting the first barrel 2 and the second barrel 201 with the help of the main screw sleeve 4 can be effectively improved.

[0058] In the specific implementation process, Figure 3As shown, each through-tube 6 and the sleeve 701 are connected with a connecting tube 601, and a valve 602 is fixedly installed in the connecting tube 601. During the use of the device, a plurality of first cylinders 2 and second cylinders 201 correspondingly arranged up and down are arranged therein, so as to realize the connection and interruption control of multiple circuits. Since each through-tube 6 is respectively connected between the upper end of the first cylinder 2 and the lower end of the second cylinder 201 corresponding to the upper and lower parts, and each through-tube 6 and the sleeve 701 are connected with a connecting tube 601, and the valve 602 is installed in the connecting tube 601, the connection and interruption of each connecting tube 601 can be controlled. When the valve 60 When the connecting pipe 601 is controlled to interrupt the flow of insulating oil, the flow of insulating oil in the inner cylinder 7 and the sleeve 701 cannot affect the first piston 303 and the second piston 308 in the first cylinder 2 and the second cylinder 201 corresponding to the closed connecting pipe 601, so that the corresponding first contact 301 and the second contact 305 are in an uncontrollable state, and the first cylinder 2 and the second cylinder 201 corresponding to the open state of the valve 602 in other connecting pipes 601 are not affected, so that the device can flexibly control the circuit that needs vacuum breaking according to actual use requirements, which improves the flexibility of the device in actual use to a certain extent.

[0059] In the specific implementation process, Figure 7 , Fig. 9 and Fig.12 As shown, the insulating oil has excellent thermal conductivity, a pump 9 and a heat exchanger 901 are fixedly installed on the top of the control box 5, a first connecting pipe 902 is connected between the through pipe 6 and the water inlet of the pump 9, the water outlet of the pump 9 is connected to the heat exchanger 901, a second connecting pipe 903 is connected between the heat exchanger 901 and the through pipe 6, a vertically arranged partition 904 is fixedly installed in the through pipe 6, the interior of the through pipe 6 is divided into two vertical flow channels by the partition 904, the upper and lower ends of the two flow channels are respectively connected to the top of the first cylinder 2 and the bottom of the second cylinder 201, the connecting pipe 601 and the first connecting pipe 902 are directly connected to one of the flow channels, and the second connecting pipe 903 is directly connected to the other flow channel.

[0060] During use of the device, since the insulating oil filled at the upper end of the first cylinder 2 and the lower end of the second cylinder 201 has excellent thermal conductivity, the heat generated when the first contact 301 and the second contact 305 in the vacuum chamber 3 are connected and energized can be quickly discharged outward with the help of the excellent thermal conductivity of the insulating oil, avoiding overheating and damage of the first contact 301, the plug rod 304 and the second contact 305, which is beneficial to improving the stability of the device during actual use.

[0061] Each of the first connecting pipe 902 and the second connecting pipe 903 is equipped with an electric control valve. When the inner cylinder 7 and the sleeve 701 move relative to each other to control the first contact 301 and the second contact 305 to move relative to each other, the pump 9 is in an unstarted state, and the electric control valves in the first connecting pipe 902 and the second connecting pipe 903 are closed, and the insulating oil in the plurality of through pipes 6 is in a disconnected state. When the circuit control operation is completed, the insulating oil needs to be quickly cooled. At this time, the electric control valves in the valve 602 and the second connecting pipe 903 are opened. When the insulating oil is quickly cooled, the heat generated by the first contact 301, the plug rod 304 and the second contact 305 is transferred to the first cylinder 2 through the first piston 303 and the second piston 308. The insulating oil in the insulating oil at the end and the lower end of the second cylinder 201 is then transferred to the insulating oil in the through-tube 6. Subsequently, the pump 9 installed on the control box 5 is powered on and started, and the insulating oil in the through-tube 6 is pumped into the heat exchanger 901 through the connection of the first connecting pipe 902. The high-temperature insulating oil is heat exchanged and dissipated in the heat exchanger 901, and after the temperature is reduced, it flows back to the through-tube 6 through the second connecting pipe 903, forming a circulating flow of the insulating oil. Since the partition 904 is vertically fixed in the through-tube 6, the internal space of the through-tube 6 is divided into two flow channels connected at the upper and lower ends, which allows the insulating oil in the through-tube 6 to circulate stably up and down, thereby further improving the stability and efficiency of the device for heat dissipation through the flow of insulating oil.

[0062] Specifically, the working principle and operation method of the present invention are as follows:

[0063] The device stores energy through the energy storage unit 8 to provide power for the forward and reverse rotation of the gear 703. Subsequently, the staff controls the device through the control panel 501 to realize the conduction and interruption of the circuit. When the circuit needs to be conducted, the energy storage unit 8 drives the gear 703 to rotate. With the meshing of the gear 703 and the rack rod 702, the sleeve 701 is driven to move leftward relative to the inner cylinder 7. The insulating oil in the inner cylinder 7 and the sleeve 701 enters from the upper end of the first cylinder 2 and the lower end of the second cylinder 201 under the connection of the connecting pipe 601 and the through pipe 6, and at the same time, a downward push is applied to the first piston 303 and an upward push is applied to the second piston 308, driving the first contact 301 and the insertion rod 304 to drive the second contact 305 to approach each other synchronously in the vacuum chamber 3, realizing the rapid contact between the first contact 301 and the second contact 305, and conducting the circuit. When the circuit needs to be interrupted, the energy storage unit 8 drives the gear 703 to rotate in the opposite direction, driving The sleeve 701 moves rightward relative to the inner cylinder 7, and the insulating oil at the upper end of the first cylinder 2 and the lower end of the second cylinder 201 flows back into the inner cylinder 7 through the connection between the through pipe 6 and the connecting pipe 601, so that the first piston 303 moves up and the second piston 308 moves down and resets, driving the first contact 301 and the plug rod 304 to drive the second contact 305 to move away from each other synchronously in the vacuum chamber 3, so as to realize the rapid separation of the first contact 301 and the second contact 305, and interrupt the circuit. Synchronously, after the pump 9 is powered on and started, the high-temperature insulating oil in the through pipe 6 is driven to circulate after heat exchange and heat dissipation in the heat exchanger 901, so as to quickly cool down the first contact 301, the plug rod 304 and the second contact 305, and ensure their operational stability. During daily maintenance, the staff rotates the main screw sleeve 4, the first auxiliary screw sleeve 402 and the second auxiliary screw sleeve 403 to complete the disassembly and assembly of the first cylinder 2 and the second cylinder 201, and the internal structure can be conveniently disassembled and replaced.

[0064] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A vacuum circuit breaker for protecting and controlling a power distribution system, comprising a base (1), characterized in that: A plurality of first cylinders (2) and second cylinders (201) are installed at the rear of the top of the base (1) and are symmetrically arranged in the upper and lower directions; a first plug (202) arranged in the longitudinal direction is fixedly installed on the back of the first cylinder (2); a second plug (203) arranged in the longitudinal direction is fixedly installed on the back of the second cylinder (201); a vacuum chamber (3) is installed inside the connection position between the first cylinder (2) and the second cylinder (201); a first contact (303) extending into the first cylinder (2) is slidably inserted on the upper part of the interior of the vacuum chamber (3) 01), and the outer side of the first contact (301) is movably sleeved with a first conductive ring (302) electrically connected to the first plug (202), the top of the first contact (301) is fixed with a first piston (303) slidably mounted in the first cylinder (2), the lower part of the interior of the vacuum chamber (3) is slidably inserted with an insertion rod (304) extending into the second cylinder (201), and the upper end of the insertion rod (304) is connected to a second contact (305) arranged directly below the first contact (301), and the outer side of the insertion rod (304) is The movable sleeve is provided with a second conductive ring (307) electrically connected to the second plug (203); the bottom end of the plug rod (304) is fixed with a second piston (308) slidably mounted in the second cylinder (201); a control box (5) is fixedly mounted on the top front of the base (1); and a control panel (501) is fixedly mounted on the front of the control box (5); a vertically arranged through pipe (6) is connected between the upper end of the first cylinder (2) and the lower end of the second cylinder (201); and a control box (501) is fixedly mounted in the base (1). An inner cylinder (7) is disposed below the body (201), and the left end of the inner cylinder (7) is connected to the through pipe (6); a sleeve (701) is movably sleeved on the outer side of the right end of the inner cylinder (7), and a rack rod (702) arranged transversely is fixedly installed on the front end wall of the sleeve (701); a gear (703) meshing with the rack rod (702) is rotatably installed in the control box (5); an energy storage unit (8) drivingly connected to the gear (703) is fixedly installed in the control box (5); and insulating oil is poured into the through pipe (6) and the inner cylinder (7).

2. A vacuum circuit breaker for protecting and controlling a power distribution system according to claim 1, characterized in that: The second contact (305) is slidably inserted into the insertion rod (304), and the outer movable sleeve of the second contact (305) is provided with a spring (306) arranged in the vacuum chamber (3), and the spring (306) is elastically supported between the insertion rod (304) and the second contact (305).

3. A vacuum circuit breaker for protecting and controlling a power distribution system according to claim 1, characterized in that: Sealing rings (309) are installed at the sliding connection position between the first contact (301) and the vacuum chamber (3), and at the sliding connection position between the insertion rod (304) and the vacuum chamber (3).

4. A vacuum circuit breaker for protecting and controlling a power distribution system according to claim 1, characterized in that: The cylindrical surface at the lower end of the first cylinder (2) and the cylindrical surface at the upper end of the second cylinder (201) are provided with matching external threads, and a main screw sleeve (4) is screwed between the first cylinder (2) and the second cylinder (201).

5. A vacuum circuit breaker for protecting and controlling a power distribution system according to claim 4, characterized in that: The interior of the lower end of the first cylinder (2) and the interior of the upper end of the second cylinder (201) are tightly filled with an insulating rubber sleeve (401) wrapped around the outside of the vacuum chamber (3).

6. A vacuum circuit breaker for protecting and controlling a power distribution system according to claim 4, characterized in that: The lower end of the first cylinder (2) is threadedly sleeved with a first auxiliary screw sleeve (402) arranged above the main screw sleeve (4), and the upper end of the second cylinder (201) is threadedly sleeved with a second auxiliary screw sleeve (403) arranged below the main screw sleeve (4).

7. A vacuum circuit breaker for protecting and controlling a power distribution system according to claim 4, characterized in that: Mutually compatible notches (404) are provided at the lower opening of the first cylinder (2) and the upper opening of the second cylinder (201); the first cylinder (2) and the second cylinder (201) are assembled together to form a vertical cylindrical structure.

8. A vacuum circuit breaker for protecting and controlling a power distribution system according to claim 1, characterized in that: A connecting pipe (601) is connected between each of the through pipes (6) and the sleeve (701), and a valve (602) is fixedly installed in the connecting pipe (601).

9. A vacuum circuit breaker for protecting and controlling a power distribution system according to claim 8, characterized in that: The insulating oil has excellent thermal conductivity. A pump (9) and a heat exchanger (901) are fixedly mounted on the top of the control box (5). A first connecting pipe (902) is connected between the through pipe (6) and the water inlet of the pump (9). The water outlet of the pump (9) is connected to the heat exchanger (901). A second connecting pipe (903) is connected between the heat exchanger (901) and the through pipe (6).

10. A vacuum circuit breaker for protecting and controlling a power distribution system according to claim 9, characterized in that: A vertical partition (904) is fixedly installed inside the through pipe (6), and the interior of the through pipe (6) is divided into two vertical flow channels by the partition (904). The upper and lower ends of the two flow channels are respectively connected to the top of the first cylinder (2) and the bottom of the second cylinder (201), the connecting pipe (601) and the first connecting pipe (902) are directly connected to one of the flow channels, and the second connecting pipe (903) is directly connected to the other flow channel.

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