Heat dissipation vacuum circuit breaker

Abstract

The utility model discloses a heat dissipation vacuum circuit breaker, belongs to the technical field of circuit breakers, and solves the problem that the vacuum degree in a shell is inevitably reduced along with daily use, so that the use of the vacuum circuit breaker needs to be maintained by personnel frequently. Comprising a shell and a connecting plate fixedly connected to the shell, a connecting pipe communicated with the interior of the shell is fixedly connected to the side wall of the shell, an electromagnet is fixedly connected to one end of the connecting pipe, a piston is slidably connected into the connecting pipe, and a metal spring is fixedly connected between the piston and the electromagnet; the side wall of the shell is further fixedly connected with an air outlet pipe, and the air outlet pipe communicates with a one-way valve for guiding air from inside to outside. After the device is installed, the sealing plug is opened to activate the vacuum pump, air in the shell is evacuated, vacuum heat insulation is formed, and when the vacuum degree is reduced, the temperature sensor detects and triggers the control circuit, conducts the electromagnet, drives the piston to reciprocate, and maintains the vacuum degree.

Description

TECHNICAL FIELD

[0001] The utility model relates to a circuit breaker technical field especially relates to a heat dissipation vacuum circuit breaker. BACKGROUND

[0002] Vacuum circuit breaker is a kind of high voltage switchgear using vacuum as insulation and arc extinguishing medium, with excellent arc extinguishing performance and good insulation performance. Its structure mainly includes vacuum arc extinguishing chamber, operating mechanism, support and other components. Vacuum arc extinguishing chamber is its core component, which is composed of airtight insulation shell, conducting loop, shielding system, contact and bellows, etc. It is responsible for breaking or making current in the circuit. When breaking, arc will be generated between contacts, but due to the vacuum environment, arc will be extinguished quickly, so as to achieve the purpose of breaking current. The advantage of vacuum circuit breaker is small size, light weight, long mechanical life, low maintenance cost, and suitable for frequent operation. Because of the insulation characteristics of vacuum, the insulation performance of vacuum circuit breaker is not affected by environmental conditions such as humidity, pressure and pollution.

[0003] In addition to the vacuum arc extinguishing chamber, the shell of the vacuum circuit breaker contains the operating mechanism, the support and other components, which also need to be preserved in a relatively vacuum environment to avoid the influence of air on these structures. With daily use, the vacuum degree in the shell will inevitably decrease, which leads to the need for personnel maintenance of the vacuum circuit breaker.

[0004] Therefore, a heat dissipation vacuum circuit breaker is proposed to solve or alleviate the above problems. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims at solving the shortcomings in the prior art and provides a heat dissipation vacuum circuit breaker.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A heat dissipation vacuum circuit breaker, comprising a shell, a connecting plate fixedly connected to the shell, a connecting pipe fixedly connected to the side wall of the shell and communicating with the inside of the shell, an electromagnet fixedly connected to one end of the connecting pipe, a piston slidingly connected in the connecting pipe, a metal spring fixedly connected between the piston and the electromagnet, an air outlet pipe fixedly connected to the side wall of the shell, and a one-way valve communicating with the air outlet pipe to guide air from inside to outside, and a temperature control on-off circuit for controlling the on-off of the electromagnet according to the temperature of the outside wall of the shell.

[0008] Preferably, the temperature control on-off circuit comprises

[0009] A temperature sensor, a probe of which is in contact with an outer sidewall of the shell and outputs a temperature signal after collecting the temperature of the shell;

[0010] A voltage comparison circuit, an input end of which is coupled with an output end of the temperature sensor, and the voltage comparison circuit outputs a comparison signal in response to the temperature signal being greater than a preset temperature reference signal;

[0011] A control circuit, an input end of which is coupled with an output end of the voltage comparison circuit, and the control circuit outputs a feedback control signal in response to the comparison signal;

[0012] An alternating on-off circuit, an input end of which is coupled with an output end of the control circuit, and the alternating on-off circuit controls the electromagnetic iron to intermittently turn on and off.

[0013] Preferably, the alternating on-off circuit comprises

[0014] A first switch circuit, a controlled end of which is coupled with an output end of the control circuit, and the first switch circuit controls a switch end thereof to turn on in response to the control signal;

[0015] An oscillation circuit, which is coupled on the switch end of the first switch circuit, and the oscillation circuit outputs a sine wave-shaped oscillation signal with alternating high and low levels after being powered on;

[0016] A trigger circuit, an input end of which is coupled with an output end of the oscillation circuit, and the trigger circuit outputs a trigger signal in response to the high-level oscillation signal;

[0017] A second switch circuit, a controlled end of which is coupled with an output end of the control circuit, and a switch end of the second switch circuit is in series with the electromagnetic iron, and the second switch circuit controls the switch end thereof and the electromagnetic iron to be powered on in response to the trigger signal.

[0018] Preferably, the voltage comparison circuit comprises a voltage comparator, and the first switch circuit and the second switch circuit each comprise a triode switch.

[0019] Preferably, the control circuit comprises an integrated circuit of an STM32F103RCT6 embedded-microcontroller, the trigger circuit comprises an RS trigger, and the oscillation circuit comprises an LC oscillation circuit.

[0020] Preferably, a suction seat in communication with the inside of the shell is fixedly connected to the sidewall of the shell, and a sealing plug for blocking the suction seat is detachably connected to an opening of the suction seat.

[0021] Preferably, a plurality of vacuum interrupters are further included, outer rings of the vacuum interrupters are fixedly connected with connecting plates, the top surface of the shell is provided with through holes for the vacuum interrupters to penetrate, the top surface of the shell is fixedly connected with a fixed plate, the fixed plate is provided with through grooves coaxially arranged with the through holes, the cross section of the through grooves is same as that of the connecting plates, the top surface of the shell is provided with a sealing ring below the connecting plates, and connecting bolts penetrating the sealing ring and the connecting plates are threadedly connected to the top surface of the shell.

[0022] The utility model has the following beneficial effects:

[0023] After installation, the sealing plug is opened to activate the vacuum pump, the air in the shell is pumped out to form vacuum heat insulation, when the vacuum degree decreases, the temperature sensor detects and triggers the control circuit, the electromagnet is turned on to drive the piston to reciprocate, and the vacuum degree is maintained. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will be briefly introduced the drawings needed to be used in the embodiments, it should be understood, the following drawings only shows some embodiments of the utility model, therefore should not be regarded as the limitation to the range, for the ordinary skilled person in the art, under the premise of not paying the creative labor, still can obtain other related drawings according to these drawings.

[0025] Figure 1 It is the structural schematic diagram of the utility model;

[0026] Figure 2 It is the structural block diagram of temperature control on-off circuit in the utility model.

[0027] 1, shell;2, fixed plate;3, sealing ring;4, connecting plate;5, vacuum interrupter;6, connecting bolt;7, air extraction seat;8, sealing plug;9, connecting pipe;10, electromagnet;11, metal spring;12, piston;13, air outlet pipe;14, check valve;15, temperature sensor;16, voltage comparison circuit;17, control circuit;18, first switch circuit;19, oscillation circuit;20, trigger circuit;21, second switch circuit. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantage of the embodiments of the utility model more clear, the following will be combined with the drawings in the embodiments of the utility model, the technical scheme in the embodiments of the utility model is clearly and completely described, obviously, the described embodiments are a part of the embodiments of the utility model, instead of all the embodiments. The components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0030] It should be noted that: similar signs and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0031] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the product of the present application is used, or the orientation or positional relationship commonly understood by those skilled in the art, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0032] In addition, the terms "first", "second", "third" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set", "mount", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] A heat dissipation vacuum circuit breaker, as shown in Figure 1 The shell 1 is fixedly connected with a connecting plate 4, a connecting pipe 9 in communication with the inside of the shell 1 is fixedly connected on the side wall of the shell 1, an electromagnet 10 is fixedly connected at one end of the connecting pipe 9, a piston 12 is slidably connected in the connecting pipe 9, a metal spring 11 is fixedly connected between the piston 12 and the electromagnet 10, an air outlet pipe 13 is also fixedly connected on the side wall of the shell 1, a one-way valve 14 for guiding air from inside to outside is communicated on the air outlet pipe 13, and a temperature control on-off circuit is further included, which controls the on-off of the electromagnet 10 according to the temperature of the outer side wall of the shell 1.

[0035] A vacuum seat 7, which communicates with the interior, is fixedly connected to the side wall of the housing 1. A sealing plug 8, which is detachably connected to the opening of the vacuum seat 7, is used to seal and block the opening. The housing 1 also includes several vacuum interrupters 5. A connecting plate 4 is fixedly connected to the outer ring of the vacuum interrupter 5. A through hole is provided on the top surface of the housing 1 for the vacuum interrupter 5 to pass through. A fixing plate 2 is fixedly connected to the top surface of the housing 1. A through groove is provided on the fixing plate 2, which is coaxial with the through hole. The cross section of the through groove is the same as the cross section of the connecting plate 4. A sealing ring 3 is provided on the top surface of the housing 1, located below the connecting plate 4. A connecting bolt 6, which passes through the sealing ring 3 and the connecting plate 4, is threadedly connected to the top surface of the housing 1.

[0036] like Figure 2 As shown, the temperature control circuit includes a temperature sensor 15, a voltage comparison circuit 16, a control circuit 17, and an alternating on / off circuit. The probe of the temperature sensor 15 contacts the outer wall of the housing 1 and outputs a temperature signal after collecting the temperature of the housing 1. The input terminal of the voltage comparison circuit 16 is coupled to the output terminal of the temperature sensor 15. The voltage comparison circuit 16 sends a comparison signal after the temperature signal is greater than the preset temperature reference signal. The input terminal of the control circuit 17 is coupled to the output terminal of the voltage comparison circuit 16. The control circuit 17 feeds back a control signal after responding to the comparison signal. The input terminal of the alternating on / off circuit is coupled to the output terminal of the control circuit 17. The alternating on / off circuit controls the electromagnet 10 to be intermittently energized and de-energized.

[0037] The alternating on / off circuit includes a first switching circuit 18, an oscillation circuit 19, a trigger circuit 20, and a second switching circuit 21. The controlled terminal of the first switching circuit 18 is coupled to the output terminal of the control circuit 17. The first switching circuit 18 controls its switching terminal to conduct in response to a control signal. The oscillation circuit 19 is coupled to the switching terminal of the first switching circuit 18. After being energized, the oscillation circuit 19 outputs a sinusoidal wave and alternately outputs high and low level oscillation signals. The input terminal of the trigger circuit 20 is coupled to the output terminal of the oscillation circuit 19. The trigger circuit 20 responds to a high level oscillation signal... The output trigger signal is provided; the controlled terminal of the second switching circuit 21 is coupled to the output terminal of the control circuit 17, the switching terminal of the second switching circuit 21 is connected in series with the electromagnet 10, and the second switching circuit 21 controls its switching terminal and the electromagnet 10 to be energized after responding to the trigger signal; the voltage comparison circuit 16 includes a voltage comparator; both the first switching circuit 18 and the second switching circuit 21 include transistor switches; the control circuit 17 includes an integrated circuit of an STM32F103RCT6 embedded microcontroller; the trigger circuit 20 includes an RS flip-flop; and the oscillation circuit 19 includes an LC oscillation circuit.

[0038] The utility model discloses a vacuum degree monitoring device for shell, including the shell 1 of vacuum degree monitoring device, the temperature sensor 15 of vacuum degree monitoring device, the voltage comparison circuit 16 of vacuum degree monitoring device, the control circuit 17 of vacuum degree monitoring device, the first switch circuit 18 of vacuum degree monitoring device, the oscillation circuit 19 of vacuum degree monitoring device, the trigger circuit 20 of vacuum degree monitoring device, the second switch circuit 21 of vacuum degree monitoring device, the electromagnet 10 of vacuum degree monitoring device, the metal spring 11 of vacuum degree monitoring device, the piston 12 of vacuum degree monitoring device, the air outlet pipe 13 of vacuum degree monitoring device and the one-way valve 14 of vacuum degree monitoring device, the utility model discloses the temperature sensor 15 is arranged on the outer wall of shell 1, and the temperature sensor 15 is connected with the voltage comparison circuit 16, and the voltage comparison circuit 16 is connected with the control circuit 17, and the control circuit 17 is connected with the first switch circuit 18, and the first switch circuit 18 is connected with the oscillation circuit 19, and the oscillation circuit 19 is connected with the trigger circuit 20, and the trigger circuit 20 is connected with the second switch circuit 21, and the second switch circuit 21 is connected with the electromagnet 10, and the electromagnet 10 is connected with the metal spring 11, and the metal spring 11 is connected with the piston 12, and the piston 12 is connected with the air outlet pipe 13 and the one-way valve 14, and the air outlet pipe 13 is connected with the one-way valve 14.

[0039] The above only is the preferred embodiment of the utility model and does not use for limiting the utility model, for the skilled person in the art, the utility model can have various changes and changes. Any modification, equivalent replacement, improvement etc. that is made in the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A heat dissipating vacuum circuit breaker characterized by, The utility model relates to a temperature control circuit, including shell (1), and fixedly connected connecting plate (4) on shell (1), the side wall of shell (1) is fixedly connected with the connecting pipe (9) that communicates with its inside, one end of connecting pipe (9) is fixedly connected with electromagnet (10), slidingly connected with piston (12) in connecting pipe (9), fixedly connected with metal spring (11) between piston (12) and electromagnet (10), the side wall of shell (1) is also fixedly connected with the air outlet pipe (13), the air outlet pipe (13) is communicated with the one-way valve (14) of guiding air from inside to outside guide, still include temperature control on-off circuit, temperature control on-off circuit controls electromagnet (10) on-off electricity according to the temperature situation of shell (1) outside wall.

2. A heat dissipating vacuum circuit breaker according to claim 1, characterized in that The temperature control on-off circuit includes temperature sensor (15), the probe of temperature sensor (15) is in contact with the outside wall of shell (1) and gathers the temperature of shell (1) and then exports temperature signal; Voltage comparison circuit (16), the input end of voltage comparison circuit (16) is coupled with the output end of temperature sensor (15), and the voltage comparison circuit (16) sends out comparison signal in response to temperature signal greater than the temperature reference signal preset therein; Control circuit (17), the input end of control circuit (17) is coupled with the output end of voltage comparison circuit (16), and the control circuit (17) feeds back control signal in response to comparison signal; Alternating on-off circuit, the input end of alternating on-off circuit is coupled with the output end of control circuit (17), and the alternating on-off circuit controls electromagnet (10) intermittent on-off electricity.

3. A heat dissipating vacuum circuit breaker according to claim 2, wherein The alternating on-off circuit includes First switching circuit (18), the controlled end of first switching circuit (18) is coupled with the output end of control circuit (17), and the first switching circuit (18) controls its switch end conduction in response to control signal; Oscillation circuit (19), the oscillation circuit (19) is coupled on the switch end of first switching circuit (18), and the oscillation circuit (19) exports sine wave and alternately exports high, low level oscillation signal after power on; Trigger circuit (20), the input end of trigger circuit (20) is coupled with the output end of oscillation circuit (19), and the trigger circuit (20) exports trigger signal in response to high level oscillation signal; Second switching circuit (21), the controlled end of second switching circuit (21) is coupled with the output end of control circuit (17), and the switch end of second switching circuit (21) is in series with electromagnet (10), and the second switching circuit (21) controls its switch end and electromagnet (10) power on in response to trigger signal.

4. A heat dissipating vacuum circuit breaker according to claim 3, wherein The voltage comparison circuit (16) includes a voltage comparator, and the first switching circuit (18) and the second switching circuit (21) each include a triode switch.

5. A heat dissipating vacuum circuit breaker according to claim 3, wherein The control circuit (17) includes an integrated circuit of an STM32F103RCT6 embedded microcontroller, the trigger circuit (20) includes an RS flip-flop, and the oscillation circuit (19) includes an LC oscillation circuit.

6. A heat dissipating vacuum circuit breaker according to claim 1, wherein The side wall of the shell (1) is fixedly connected with an air extraction seat (7) in communication with the inside of the shell (1), and a sealing plug (8) is detachably connected to the opening of the air extraction seat (7) to block the opening.

7. A heat dissipating vacuum circuit breaker according to claim 6, characterized in that A plurality of vacuum interrupters (5) are further included, the outer ring of each vacuum interrupter (5) is fixedly connected with a connecting plate (4), the top surface of the shell (1) is provided with a through hole for the vacuum interrupter (5) to pass through, the top surface of the shell (1) is fixedly connected with a fixed plate (2), the fixed plate (2) is provided with a through slot coaxially arranged with the through hole, the cross section of the through slot is the same as that of the connecting plate (4), the top surface of the shell (1) is provided with a sealing ring (3) located below the connecting plate (4), and the top surface of the shell (1) is threadedly connected with a connecting bolt (6) penetrating through the sealing ring (3) and the connecting plate (4).

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