CN210490096U - Indoor alternating current metal closed ring network switch equipment - Google Patents
Indoor alternating current metal closed ring network switch equipment Download PDFInfo
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- CN210490096U CN210490096U CN201921541278.4U CN201921541278U CN210490096U CN 210490096 U CN210490096 U CN 210490096U CN 201921541278 U CN201921541278 U CN 201921541278U CN 210490096 U CN210490096 U CN 210490096U
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Abstract
The utility model discloses an indoor interchange metal-enclosed looped network switchgear, including the shell and install the circuit board in the shell, be provided with the radiating groove on the shell, the separation net has been arranged on the radiating groove, the inside of shell is equipped with the cooling fan, the cooling fan sets up in radiating groove department, still be provided with sealed lid on the shell, the both ends of sealed lid are provided with the slip track, the upper end of sealed lid is provided with push-and-pull cylinder, be provided with temperature sensor in the shell, temperature sensor is respectively associated with cooling fan and push-and-pull cylinder, be provided with contact pick-up on the shell, be equipped with power module on the circuit; the power supply module comprises a voltage input end, a first resistor, a first triode, a second resistor, a seventh resistor, a second triode, a third resistor, a fourth potentiometer, a fifth resistor, a sixth resistor and a voltage output end. The utility model discloses the security and the reliability of circuit are higher.
Description
Technical Field
The utility model relates to an electrical equipment field, in particular to indoor interchange metal-enclosed looped netowrk switchgear.
Background
In the field of high-voltage circuits, the switching equipment is arranged indoors very commonly at present, the number of the switching equipment is large at present, and the alternating-current metal closed looped network switching equipment is popular with the majority of users due to long service life and good working efficiency. Some present indoor interchange metal-enclosed looped netowrk switchgear through setting up radiating groove and cooling blower, can dispel the heat in the closed box body to promote sealed lid through push-and-pull cylinder and seal the radiating groove when need not to dispel the heat, avoid special gas to get into in the closed box body, improve the leakproofness and the radiating effect of closed box body, improve equipment's life. However, the power supply part of the conventional indoor ac metal closed loop network switch device lacks corresponding circuit protection functions, such as: the safety and reliability of the circuit are poor due to the lack of the current-limiting protection function.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to the above-mentioned defect of prior art, the indoor interchange metal-enclosed looped netowrk switchgear that provides the security and the reliability of a circuit.
The utility model provides a technical scheme that its technical problem adopted is: the indoor alternating-current metal closed looped network switch equipment comprises a shell and a circuit board installed in the shell, wherein a heat dissipation groove is formed in the shell, an isolation net is arranged on the heat dissipation groove, a heat dissipation fan is arranged inside the shell and is arranged at the position of the heat dissipation groove, a sealing cover is further arranged on the shell, sliding rails are arranged at two ends of the sealing cover, a push-pull air cylinder is arranged at the upper end of the sealing cover, a temperature sensor is arranged in the shell and is respectively associated with the heat dissipation fan and the push-pull air cylinder, a contact sensor is arranged on the shell, and a power supply module is arranged on the circuit board;
the power supply module comprises a voltage input end, a first resistor, a first triode, a second resistor, a seventh resistor, a second triode, a third resistor, a fourth potentiometer, a fifth resistor, a sixth resistor and a voltage output end, wherein the voltage input end is respectively connected with a collector of the first triode and one end of the first resistor, a base of the first triode is respectively connected with the other end of the first resistor and a collector of the second triode, an emitter of the first triode is respectively connected with one end of the second resistor, one end of the third resistor and one end of the sixth resistor, an emitter of the second triode is respectively connected with the other end of the second resistor and one end of the seventh resistor, the other end of the third resistor is connected with a fixed end of the fourth potentiometer, and a base of the second triode is connected with a sliding end of the fourth potentiometer, the other fixed end of the fourth potentiometer is connected with one end of the fifth resistor, the other end of the seventh resistor, the other end of the fifth resistor and the other end of the sixth resistor are connected with the voltage output end, and the resistance value of the seventh resistor is 36k omega.
Indoor interchange metal-enclosed looped netowrk switchgear in, power module still includes first diode, the positive pole of first diode respectively with the other end of first resistance and the base of first triode are connected, the negative pole of first diode with the collecting electrode of second triode is connected, the model of first diode is S-202T.
Indoor interchange metal-enclosed looped netowrk switchgear in, power module still includes eighth resistance, the one end of eighth resistance respectively with the projecting pole of first triode and the one end of second resistance are connected, the other end of eighth resistance respectively with the one end of third resistance and the one end of sixth resistance are connected.
In the indoor ac metal-enclosed looped network switch device of the present invention, the resistance of the eighth resistor is 28k Ω.
In the indoor ac metal-enclosed looped network switch device of the present invention, the first triode is an NPN type triode.
In the indoor ac metal-enclosed looped network switchgear of the present invention, the second triode is an NPN type triode.
Implement the utility model discloses an indoor interchange metal-enclosed looped netowrk switchgear has following beneficial effect: the power supply module comprises a voltage input end, a first resistor, a first triode, a second resistor, a seventh resistor, a second triode, a third resistor, a fourth potentiometer, a fifth resistor, a sixth resistor and a voltage output end, and the seventh resistor is used for current-limiting protection, so that the safety and the reliability of the circuit are high.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of the indoor ac metal closed loop network switchgear of the present invention;
fig. 2 is a schematic circuit diagram of the power supply module in the embodiment.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the embodiment of the utility model, the schematic structural diagram of the indoor ac metal closed loop network switchgear is as shown in fig. 1. In fig. 1, this indoor interchange metal-enclosed looped netowrk switchgear includes shell 1 and installs circuit board 9 in shell 1, be provided with radiating groove 2 on the shell 1, the separation net has been arranged on radiating groove 2, the inside of shell 1 is equipped with cooling fan 3, cooling fan 3 sets up in radiating groove 2 department, still be provided with sealed lid 4 on the shell 1, the both ends of sealed lid 4 are provided with slip track 5, the upper end of sealed lid 4 is provided with push-and-pull cylinder 6, it slides on slip track 5 to promote sealed lid 4 through push-and-pull cylinder 6, and then seal radiating groove 2. Be provided with temperature sensor 7 in the shell 1, temperature sensor 7 is associated with cooling blower 3 and push-and-pull cylinder 6 respectively, is provided with contact sensor 8 on the shell 1, detects sealed position of lid 4 through contact sensor 8, is equipped with power module on the circuit board 9.
Dispel the heat in to shell 1 through radiating groove 2 and cooling fan 3 to promote sealed lid 4 through push-and-pull cylinder 6 when need not to dispel the heat and seal radiating groove 2, avoid special gas to get into in the shell 1, improve the leakproofness and the radiating effect of shell 1, and detect the temperature in to shell 1 through temperature sensor 7, and control cooling fan 3 or push-and-pull cylinder 6 work, dispel the heat or sealed work, improve equipment's life.
The main switch, the operating mechanism and the components of the indoor alternating current metal closed looped network switch device adopt original SFG12/24 type of ABB company, SC6 type of France Schneider company and FLN36-12D type SF6 switch devices produced in China, and can also be assembled with an original HAD/US type SF6 circuit breaker or a VD4-S type vacuum circuit breaker of ABB company according to the needs of users, and the operating mode is divided into manual operation and electric operation.
The shell 1 is formed by connecting an imported aluminum pound plate through a processing shed of a numerical control machine tool, the protection grade reaches IP3X, and the shell has reliable mechanical interlocking and anti-misoperation functions. The indoor alternating current metal closed looped network switch device has the advantages of small volume, light weight, attractive appearance, simplicity and convenience in operation, long service life, no pollution, less maintenance and the like. The surface of the shell 1 is sprayed with powder, and the appearance is attractive and elegant.
The indoor alternating current metal closed looped network switch equipment is suitable for a three-phase alternating current power distribution system with rated voltage of 12KV and rated frequency of 50Hz, can form a looped network power supply unit terminal for power supply, and can be combined randomly according to the main wiring requirements of a transformer substation and a power distribution station. The product is an ideal product for the power distribution construction of medium and small factories, power distribution substations, residential districts, high-rise buildings and schools at present.
Fig. 2 is a schematic circuit diagram of a power supply module in this embodiment, in fig. 2, the power supply module includes a voltage input terminal Vin, a first resistor R1, a first transistor Q1, a second resistor R2, a seventh resistor R7, a second transistor Q2, a third resistor R3, a fourth potentiometer RP4, a fifth resistor R5, a sixth resistor R6, and a voltage output terminal Vo, wherein the voltage input terminal Vin is connected to a collector of the first transistor Q1 and one end of the first resistor R1, a base of the first transistor Q1 is connected to the other end of the first resistor R1 and a collector of the second transistor Q2, an emitter of the first transistor Q1 is connected to one end of the second resistor R2, one end of the third resistor R3, and one end of the sixth resistor R6, an emitter of the second transistor Q2 is connected to the other end of the second resistor R2 and one end of the seventh resistor R7, and a fixed end of the third resistor R3 is connected to a fixed end of the fourth resistor RP 639, the base of the second triode Q2 is connected with the sliding end of the fourth potentiometer RP4, the other fixed end of the fourth potentiometer RP4 is connected with one end of the fifth resistor R5, and the other end of the seventh resistor R7, the other end of the fifth resistor R5 and the other end of the sixth resistor R6 are all connected with the voltage output end Vo.
The seventh resistor R7 is a current limiting resistor for current limiting protection. The current limiting protection principle is as follows: when the current of the branch where the seventh resistor R7 is located is large, the current of the branch where the seventh resistor R7 is located can be reduced by the seventh resistor R7, so that the branch can be kept in a normal operating state, and the components in the circuit cannot be burnt out due to the large current, so that the safety and reliability of the circuit are high. It should be noted that, in the present embodiment, the resistance of the seventh resistor R7 is 36k Ω. Of course, in practical applications, the resistance of the seventh resistor R7 may be adjusted according to specific situations, that is, the resistance of the seventh resistor R7 may be increased or decreased according to specific situations.
The working principle of the power supply module is as follows: in use, when the output voltage is reduced due to some reason, the base voltage of the second transistor Q2 is reduced proportionally by the sampling circuit of the third resistor R3, the fourth potentiometer RP4 and the fifth resistor R5, the emitter voltage of the second transistor Q2 is reduced, so that the base current of the second transistor Q2 is reduced, the emitter current of the second transistor Q2 is increased along with the reduction of the voltage drop of the second transistor Q2, so that the emitter voltage of the second transistor Q2 is increased, that is, the base voltage of the first transistor Q1 is increased, the voltage drop of the first transistor Q1 is reduced, so that more input voltage is applied to the load, so that the output voltage is increased, and the regulation of voltage stabilization is performed.
In this embodiment, the first transistor Q1 is an NPN transistor. The second transistor Q2 is an NPN transistor. Certainly, in practical applications, the first transistor Q1 and the second transistor Q2 may both adopt PNP transistors, but the circuit structure is also changed accordingly.
In this embodiment, the power supply module further includes a first diode D1, an anode of the first diode D1 is connected to the other end of the first resistor R1 and a base of the first transistor Q1, and a cathode of the first diode D1 is connected to a collector of the second transistor Q2. The first diode D1 is a current limiting diode for current limiting protection of the collector current of the second transistor Q2. The current limiting protection principle is as follows: when the collector current of the second triode Q2 is large, the first diode D1 can reduce the collector current of the second triode Q2 to keep the second triode Q2 in a normal working state, so that the device in the circuit is not burnt out due to the large current, and the safety and reliability of the circuit are further enhanced. It should be noted that in the present embodiment, the first diode D1 has a model number S-202T. Of course, in practical applications, the first diode D1 may also be another type of diode with similar functions.
In this embodiment, the power supply module further includes an eighth resistor R8, one end of the eighth resistor R8 is connected to the emitter of the first transistor Q1 and one end of the second resistor R2, and the other end of the eighth resistor R8 is connected to one end of the third resistor R3 and one end of the sixth resistor R6. The eighth resistor R8 is a current limiting resistor for current limiting protection. The current limiting protection principle is as follows: when the current of the branch where the eighth resistor R8 is located is large, the collector current of the second triode Q2 can be reduced by the eighth resistor R8 to keep the collector current in a normal operating state, so that the device in the circuit is not burned out due to too large current, and the safety and reliability of the circuit are further enhanced. It should be noted that, in the present embodiment, the resistance of the eighth resistor R8 is 28k Ω. Of course, in practical applications, the resistance of the eighth resistor R8 may be adjusted according to specific situations, that is, the resistance of the eighth resistor R8 may be increased or decreased according to specific situations.
In short, in this embodiment, the power supply module is provided with a current limiting resistor for current limiting protection, so that the safety and reliability of the circuit are high.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. An indoor alternating-current metal closed looped network switch device is characterized by comprising a shell and a circuit board installed in the shell, wherein a heat dissipation groove is formed in the shell, an isolation net is arranged on the heat dissipation groove, a heat dissipation fan is arranged inside the shell and is arranged at the heat dissipation groove, a sealing cover is further arranged on the shell, sliding rails are arranged at two ends of the sealing cover, a push-pull air cylinder is arranged at the upper end of the sealing cover, a temperature sensor is arranged in the shell and is respectively associated with the heat dissipation fan and the push-pull air cylinder, a contact sensor is arranged on the shell, and a power supply module is arranged on the circuit board;
the power supply module comprises a voltage input end, a first resistor, a first triode, a second resistor, a seventh resistor, a second triode, a third resistor, a fourth potentiometer, a fifth resistor, a sixth resistor and a voltage output end, wherein the voltage input end is respectively connected with a collector of the first triode and one end of the first resistor, a base of the first triode is respectively connected with the other end of the first resistor and a collector of the second triode, an emitter of the first triode is respectively connected with one end of the second resistor, one end of the third resistor and one end of the sixth resistor, an emitter of the second triode is respectively connected with the other end of the second resistor and one end of the seventh resistor, the other end of the third resistor is connected with a fixed end of the fourth potentiometer, and a base of the second triode is connected with a sliding end of the fourth potentiometer, the other fixed end of the fourth potentiometer is connected with one end of the fifth resistor, the other end of the seventh resistor, the other end of the fifth resistor and the other end of the sixth resistor are connected with the voltage output end, and the resistance value of the seventh resistor is 36k omega.
2. The indoor ac metal closed loop network switching apparatus as claimed in claim 1, wherein the power supply module further comprises a first diode, an anode of the first diode is connected to the other end of the first resistor and a base of the first triode, respectively, a cathode of the first diode is connected to a collector of the second triode, and the first diode is S-202T.
3. The indoor alternating current metal closed loop network switching device as claimed in claim 2, wherein the power supply module further comprises an eighth resistor, one end of the eighth resistor is connected to the emitter of the first triode and one end of the second resistor respectively, and the other end of the eighth resistor is connected to one end of the third resistor and one end of the sixth resistor respectively.
4. The indoor alternating current metal closed loop network switching device as claimed in claim 3, wherein the resistance value of the eighth resistor is 28k Ω.
5. An indoor alternating current metal closed loop network switching device as claimed in any one of claims 1 to 4, wherein the first triode is an NPN type triode.
6. An indoor AC metal closed loop network switching device as claimed in any one of claims 1 to 4, wherein the second triode is an NPN triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921541278.4U CN210490096U (en) | 2019-09-17 | 2019-09-17 | Indoor alternating current metal closed ring network switch equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921541278.4U CN210490096U (en) | 2019-09-17 | 2019-09-17 | Indoor alternating current metal closed ring network switch equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210490096U true CN210490096U (en) | 2020-05-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921541278.4U Expired - Fee Related CN210490096U (en) | 2019-09-17 | 2019-09-17 | Indoor alternating current metal closed ring network switch equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210490096U (en) |
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2019
- 2019-09-17 CN CN201921541278.4U patent/CN210490096U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200508 Termination date: 20210917 |