CN204103481U - A kind of special purpose vehicle plant-grid connection protector - Google Patents
A kind of special purpose vehicle plant-grid connection protector Download PDFInfo
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- CN204103481U CN204103481U CN201420535784.3U CN201420535784U CN204103481U CN 204103481 U CN204103481 U CN 204103481U CN 201420535784 U CN201420535784 U CN 201420535784U CN 204103481 U CN204103481 U CN 204103481U
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Abstract
The utility model discloses a kind of special purpose vehicle plant-grid connection protector, comprise input power, load socket, solid-state relay, the major loop of described solid-state relay is connected between described input power and described load socket; Also comprise voltage sensor, described voltage sensor comprises voltage input end and voltage output end, and the voltage input end of described voltage sensor connects described input power, and described voltage sensor is in parallel with described load socket; And control circuit, described control circuit comprises signal receiving end and signal issuing side, described signal receiving end connects the voltage output end of described voltage sensor, described signal issuing side connects the control loop of described solid-state relay, and only have when the magnitude of voltage of described signal receiving end is less than threshold value, described signal issuing side just can be connected and export the signal of telecommunication.When special purpose vehicle plant-grid connection mode is incorrect, the utility model can avoid overvoltage to damage vehicle mounted electrical apparatus and equipment.
Description
Technical field
The utility model relates to a kind of special purpose vehicle plant-grid connection protector, belongs to special car circuit safety control technology field.
Background technology
Along with the development of auto industry, various novel special vehicle constantly occurs, automobile is no longer only vehicles, in various specific occasion, and the function required for can realizing by this platform of automobile.May to examine etc. in field as engineering construction, emergency communication, scene and be applied to, as caravan, blood-collecting car, engineering truck, broadcast TV communication car, mobile control room, disaster unit, the special vehicles such as car may be examined, Che Shanghui carries air-conditioning, refrigerator, detecting instrument, various communication detection equipment and vehicle mounted electrical apparatus etc., the working power great majority of these vehicle mounted electrical apparatus and equipment adopt alternating current 220V power supply, thus need external generator car or external AC power supply.When special purpose vehicle carries out plant-grid connection operation, 380V exchanges by mistake and is linked in the current supply circuit of 220V by operating personnel, causes the accident of vehicle mounted electrical apparatus and device damage to happen occasionally, causes certain economic loss.
Utility model content
The utility model for the deficiency that prior art exists, provides a kind of special purpose vehicle plant-grid connection protector just, when special purpose vehicle plant-grid connection mode is incorrect, overvoltage can be avoided to damage vehicle mounted electrical apparatus and equipment.
For solving the problem, technical solution adopted in the utility model is as follows:
A kind of special purpose vehicle plant-grid connection protector is provided, comprises:
One input power for powering to special purpose vehicle;
The load socket of the described input power of one connection;
One solid-state relay, described solid-state relay comprises control loop and major loop, and the major loop of described solid-state relay is connected between described input power and described load socket;
One voltage sensor, described voltage sensor comprises voltage input end and voltage output end, and the voltage input end of described voltage sensor connects described input power, and described voltage sensor is in parallel with described load socket;
And a control circuit, described control circuit comprises signal receiving end and signal issuing side, described signal receiving end connects the voltage output end of described voltage sensor, described signal issuing side connects the control loop of described solid-state relay, and only have when the magnitude of voltage of described signal receiving end is less than threshold value, described signal issuing side just can be connected and export the signal of telecommunication.
As the improvement of technique scheme, described control circuit comprises:
One rectifier bridge, described rectifier bridge comprises ac input end and DC output end, and described ac input end is described signal receiving end;
The filter capacitor of the DC output end of the described rectifier bridge of one connection and sampling resistor, and described filter capacitor and the parallel connection of described sampling resistor, described sampling resistor minus earth;
One voltage comparator, the inverting input of described voltage comparator connects the positive pole of described sampling resistor, and the in-phase input end of described voltage comparator connects a reference voltage one;
One photoelectrical coupler, described photoelectrical coupler comprises optocoupler input and optocoupler output, the output of voltage comparator described in described optocoupler input one Electrode connection, another Electrode connection one reference voltage two, described optocoupler output one electrode grounding, another Electrode connection one control voltage one;
The one parallel connection NPN type triode of divider resistance, the two ends of described divider resistance connect base stage and the emitter of described NPN type triode respectively, and the collector electrode of described NPN type triode connects a control voltage two by the control loop of described solid-state relay, the grounded emitter of described NPN type triode.
As the improvement of technique scheme, described control circuit also comprises: base stage connects described optocoupler output and earth-free PNP type triode, the emitter of described PNP type triode connects a control voltage three, the grounded collector of described PNP type triode, is in series with warning circuit between described PNP type triode and described control voltage three.The implication of described " base stage connects described optocoupler output and earth-free PNP type triode " is: an electrode grounding of described optocoupler output, the base stage of PNP type triode described in another Electrode connection of described optocoupler output.
As the improvement of technique scheme, described warning circuit comprises alarm lamp and/or alarming horn.
As the improvement of technique scheme, also comprise the air circuit be connected between described input power and described load socket, and described air circuit is between the voltage input end and the major loop of described solid-state relay of described voltage sensor.
As the improvement of technique scheme, also comprise the fuse be connected between described input power and described load socket, and described fuse is between described air circuit and the major loop of described solid-state relay.
Compared with prior art, implementation result of the present utility model is as follows for the utility model:
A kind of special purpose vehicle plant-grid connection protector described in the utility model, adopt the mode of voltage detecting, the input voltage of real-time detection air circuit front end, only when input voltage is within range of normal value, electric power loop is just connected, when input voltage, to depart from normal value excessive, when obviously having influence on the trouble free service of vehicle mounted electrical apparatus and equipment, control loop is off-state, now, even if air circuit is connected, also non-transformer input on load socket, and warning circuit is reported to the police with the form of sound and indicator light, remind operating personnel, wiring error, ensure the safety of vehicle mounted electrical apparatus and equipment.
Accompanying drawing explanation
Fig. 1 is the electrical block diagram of a kind of special purpose vehicle plant-grid connection protector described in the utility model;
Fig. 2 is the electrical block diagram of control circuit described in the utility model.
Embodiment
Below in conjunction with specific embodiments content of the present utility model is described.
As shown in Figure 1, a kind of special purpose vehicle plant-grid connection protector described in the utility model, comprising: input power 1, the load socket 2 connecting described input power 1, solid-state relay 3, and input power 1 is made up of live wire L, zero line N and earth connection E; In actual applications, the vehicle mounted electrical apparatus simultaneously accessed and equipment more, Chang Youyi AC power terminal box or wiring cabinet composition load socket 2; Described solid-state relay 3 comprises control loop and major loop, and the major loop of described solid-state relay 3 is connected between described input power 1 and described load socket 2; Also comprise voltage sensor 4, described voltage sensor 4 comprises voltage input end and voltage output end, and the voltage input end of described voltage sensor 4 connects described input power 1, and described voltage sensor 4 is in parallel with described load socket 2; And control circuit 5, described control circuit 5 comprises signal receiving end and signal issuing side, described signal receiving end connects the voltage output end of described voltage sensor 4, described signal issuing side connects the control loop of described solid-state relay 3, and only have when the magnitude of voltage of described signal receiving end is less than threshold value, described signal issuing side just can be connected and export the signal of telecommunication.The solid-state relay 3 adopted in this programme, it should reach more than 60A by electric current, and without discharge spark during on-off, ensure that safe and reliable control.
As shown in Figure 2, particularly, described control circuit 5 comprises: a rectifier bridge U1, and described rectifier bridge U1 comprises ac input end and DC output end, and described ac input end is described signal receiving end; The filter capacitor C1 of the DC output end of the described rectifier bridge U1 of one connection and sampling resistor R4, and described filter capacitor C1 and described sampling resistor R4 is in parallel, described sampling resistor R4 minus earth; The inverting input of one voltage comparator U2, described voltage comparator U2 connects the positive pole of described sampling resistor, and the in-phase input end of described voltage comparator U2 connects reference voltage one V1; One photoelectrical coupler PC, described photoelectrical coupler PC comprises optocoupler input and optocoupler output, the output of voltage comparator U2 described in described optocoupler input one Electrode connection, another Electrode connection one reference voltage two V2, described optocoupler output one electrode grounding, another Electrode connection one control voltage one V3; The one parallel connection NPN type triode Q1 of divider resistance R7, the two ends of described divider resistance R7 connect base stage and the emitter of described NPN type triode Q1 respectively, and the collector electrode of described NPN type triode Q1 connects control voltage two V4 by the control loop of described solid-state relay 3, the grounded emitter of described NPN type triode Q1.
Further, described control circuit 5 also comprises: base stage connects described optocoupler output and earth-free PNP type triode Q2, the emitter of described PNP type triode Q2 connects control voltage three V5, the grounded collector of described PNP type triode Q2, is in series with warning circuit between described PNP type triode Q2 and described control voltage three V5.Described warning circuit comprises alarm lamp 6 and/or alarming horn 7.
As shown in Figure 1; a kind of special purpose vehicle plant-grid connection protector described in the utility model also comprises the air circuit 8 be connected between described input power 1 and described load socket 2, and described air circuit 8 is between the voltage input end and the major loop of described solid-state relay 3 of described voltage sensor 4.Further, also comprise the fuse 9 be connected between described input power 1 and described load socket 2, and described fuse 9 is between described air circuit 8 and the major loop of described solid-state relay 3.In the applied environment of reality, vehicle mounted electrical apparatus and equipment numerous, and power is comparatively large, and gross power is added up and is about about 12KW, the preferred 80A of specification of described fuse.
Voltage sensor 4 is preferably the voltage changer of 100:0.55, when the voltage of input power 1 is 220V, the alternating voltage of a 1.21V can be induced at the secondary of voltage changer and the voltage output end of described voltage sensor 4, this voltage carries out full-wave rectification through rectifier bridge U1, after filter capacitor C1 smothing filtering, the direct voltage of a 1.71V can be obtained at the two ends of sampling resistor R4, this voltage-drop loading is to the inverting input of voltage comparator U2, the voltage of the inverting input of voltage comparator U2 is made to be 1.71V, at the in-phase input end of voltage comparator U2, there is reference voltage one V1 that fixing, particularly, reference voltage one V1 can be 5V and through the identical resistance R1 of resistance value, the dividing potential drop of R2, namely the access voltage of the in-phase input end of voltage comparator U2 is 2.5V, now, the output of voltage comparator U2 is high level, photoelectrical coupler PC not conducting, control voltage one V3 of described optocoupler output is through resistance R5, R6, R7 dividing potential drop, the base stage of NPN type triode Q1 is high level, NPN type triode Q1 conducting, solid-state relay 3 adhesive, its normally opened contact 3-1 connects, the i.e. control loop energising of solid-state relay 3, the major loop controlling solid-state relay 3 is connected.
When operating personnel's wiring error, when 380V alternating current being linked into L, N two line inputs by mistake, the alternating voltage of a 2.1V can be induced at the voltage output end of described voltage sensor 4, this voltage is through rectifier bridge U1 rectification, after filter capacitor C1 filtering, the anti-phase input terminal voltage being added to voltage comparator U2 is 2.96V; Now, the output of voltage comparator U2 is low level, photoelectrical coupler PC conducting is low level over the ground between R5 and R6 of described optocoupler output, is also low level between R6 and R7, the base stage of NPN type triode Q1 is low level, NPN type triode Q1 ends, and solid-state relay 3 disconnects, and its normally opened contact 3-1 disconnects, the i.e. control loop power-off of solid-state relay 3, the major loop controlling solid-state relay 3 turns off; It is off-state that solid-state relay 3 controls contact, even if air circuit 8 is connected, load socket 2 electric power loop still fires non-transformer input.Now, the even output of described light is low level, the base stage of triode Q2 is connected with the even output of light by resistance R8, also can be low level, PNP type triode Q2 conducting, connects warning circuit, control alarm lamp 6 and alarming horn 7 export, sound and lamplight pointing, remind operating personnel's wiring error, ensure the safety of vehicle mounted electrical apparatus and equipment.
Above content is in conjunction with specific embodiments to the detailed description that the utility model is done, and can not assert that the utility model is specifically implemented to be only limitted to these explanations.For the utility model person of ordinary skill in the field, without departing from the concept of the premise utility, some simple deduction or replace can also be made, all should be considered as the scope belonging to the utility model protection.
Claims (6)
1. a special purpose vehicle plant-grid connection protector, is characterized in that, comprising:
One input power (1) for powering to special purpose vehicle;
The load socket (2) of the one described input power of connection (1);
One solid-state relay (3), described solid-state relay (3) comprises control loop and major loop, and the major loop of described solid-state relay (3) is connected between described input power (1) and described load socket (2);
One voltage sensor (4), described voltage sensor (4) comprises voltage input end and voltage output end, the voltage input end of described voltage sensor (4) connects described input power (1), and described voltage sensor (4) is in parallel with described load socket (2);
And a control circuit (5), described control circuit (5) comprises signal receiving end and signal issuing side, described signal receiving end connects the voltage output end of described voltage sensor (4), described signal issuing side connects the control loop of described solid-state relay (3), and only have when the magnitude of voltage of described signal receiving end is less than threshold value, described signal issuing side just can be connected and export the signal of telecommunication.
2. a kind of special purpose vehicle plant-grid connection protector as claimed in claim 1, it is characterized in that, described control circuit (5) comprising:
One rectifier bridge (U1), described rectifier bridge (U1) comprises ac input end and DC output end, and described ac input end is described signal receiving end;
The filter capacitor (C1) of the DC output end of the one described rectifier bridge of connection (U1) and sampling resistor (R4), and described filter capacitor (C1) and described sampling resistor (R4) parallel connection, described sampling resistor (R4) minus earth;
One voltage comparator (U2), the inverting input of described voltage comparator (U2) connects the positive pole of described sampling resistor, and the in-phase input end of described voltage comparator (U2) connects a reference voltage one (V1);
One photoelectrical coupler (PC), described photoelectrical coupler (PC) comprises optocoupler input and optocoupler output, the output of voltage comparator (U2) described in described optocoupler input one Electrode connection, another Electrode connection one reference voltage two (V2), described optocoupler output one electrode grounding, another Electrode connection one control voltage one (V3);
The one parallel connection NPN type triode (Q1) of divider resistance (R7), the two ends of described divider resistance (R7) connect base stage and the emitter of described NPN type triode (Q1) respectively, and the collector electrode of described NPN type triode (Q1) connects a control voltage two (V4) by the control loop of described solid-state relay (3), the grounded emitter of described NPN type triode (Q1).
3. a kind of special purpose vehicle plant-grid connection protector as claimed in claim 2; it is characterized in that; described control circuit (5) also comprises: base stage connects described optocoupler output and earth-free PNP type triode (Q2); the emitter of described PNP type triode (Q2) connects a control voltage three (V5); the grounded collector of described PNP type triode (Q2), is in series with warning circuit between described PNP type triode (Q2) and described control voltage three (V5).
4. a kind of special purpose vehicle plant-grid connection protector as claimed in claim 3, is characterized in that, described warning circuit comprises alarm lamp (6) and/or alarming horn (7).
5. as a kind of special purpose vehicle plant-grid connection protector as described in arbitrary in Claims 1-4; it is characterized in that; also comprise the air circuit (8) be connected between described input power (1) and described load socket (2), and described air circuit (8) is positioned between the voltage input end of described voltage sensor (4) and the major loop of described solid-state relay (3).
6. a kind of special purpose vehicle plant-grid connection protector as claimed in claim 5; it is characterized in that; also comprise the fuse (9) be connected between described input power (1) and described load socket (2), and described fuse (9) is positioned between the major loop of described air circuit (8) and described solid-state relay (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420535784.3U CN204103481U (en) | 2014-09-17 | 2014-09-17 | A kind of special purpose vehicle plant-grid connection protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420535784.3U CN204103481U (en) | 2014-09-17 | 2014-09-17 | A kind of special purpose vehicle plant-grid connection protector |
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| Publication Number | Publication Date |
|---|---|
| CN204103481U true CN204103481U (en) | 2015-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420535784.3U Expired - Fee Related CN204103481U (en) | 2014-09-17 | 2014-09-17 | A kind of special purpose vehicle plant-grid connection protector |
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| CN (1) | CN204103481U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104300526A (en) * | 2014-09-17 | 2015-01-21 | 安徽天健环保车辆部件有限公司 | Connection protector of special vehicle power source |
-
2014
- 2014-09-17 CN CN201420535784.3U patent/CN204103481U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104300526A (en) * | 2014-09-17 | 2015-01-21 | 安徽天健环保车辆部件有限公司 | Connection protector of special vehicle power source |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150114 Termination date: 20160917 |
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| CF01 | Termination of patent right due to non-payment of annual fee |