CN201498975U - Ultralimit protecting device with self-checking system - Google Patents
Ultralimit protecting device with self-checking system Download PDFInfo
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- CN201498975U CN201498975U CN2009202369087U CN200920236908U CN201498975U CN 201498975 U CN201498975 U CN 201498975U CN 2009202369087 U CN2009202369087 U CN 2009202369087U CN 200920236908 U CN200920236908 U CN 200920236908U CN 201498975 U CN201498975 U CN 201498975U
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Abstract
The utility model discloses an ultralimit protecting device with a self-checking system. The ultralimit protecting device comprises an ultralimit protective switch, wherein the ultralimit protective switch is connected with an ultralimit signal sensor, and further comprises a double protective switch connected with the ultralimit signal sensor, and a self-checking device which is connected with the double protective switch and enables the double protective switch to realize self-checking, and a delay device is further arranged between the ultralimit signal sensor and the double protective switch. The ultralimit protecting device with the self-checking system utilizes the double protective switch which is connected with two ends of the ultralimit protective switch in parallel to realize effective protection when the double protective switch is invalid, and simultaneously, the effective state of the ultralimit protective switch can be known according to the working condition of the double-protective switch. The self-carried self-checking system can carry out invalid protection to the ultralimit protective switch at any time and has strong versatility, and simultaneously, the self-checking system itself also can realize periodical self-checking.
Description
Technical field
The utility model relates to a kind of safety guard of high-risk equipment, relates in particular to the transfinite improvement of protective device of tradition.
Background technology
In the application of prior art; some are high-risk, the protection switch that transfinites all is installed on the high-tension apparatus; the control of its signal transducer that transfinited; when superpressure, the contour danger condition of overtemperature appear in equipment; transducer provides the signal that transfinites; the switch that transfinites produces action, cuts off the electricity supply or takes other measure to cut off dangerous matter sources.Yet, if the protection switch that transfinites can not in time cut off dangerous matter sources owing to reason such as aging, malfunctioning breaks down when overrun condition occurring, security incident will take place, bring great harm for the safety of user and equipment.At present, the user is general, and the precautionary measures that adopt are, regularly to the safety check department of specialty transfinite switch or its relevant safety component are examined and determine, and prevent trouble before it happens.Yet this not only can influence the normal use even the inactive long period of equipment, and concrete operations get up also very inconvenient.In addition, transfinite switch or its relevant safety component might lose efficacy at any time, and the user can't find in time that also this just exists very big potential safety hazard.
A kind of vacuum boiler pressure protect testing fixture that is used for is disclosed in the Chinese patent 200620025821.1; the pressure protective device of wherein mentioning; it is provided with a protection check device for common pressure-head switch; by regularly pressure-head switch being checked; to strengthen its reliability; its testing fixture at first cuts off being connected of vacuum boiler and pressure-head switch, feeds a superpressure source to pressure-head switch again, whether moves by pressure-head switch to judge whether to lose efficacy.Though this pressure protective device is provided with self-test device behind pressure-head switch, so reliability of self-check device own is not high, break down easily, and versatility is not strong yet, does not have defencive function for the protection switch that transfinites of other kind; Simultaneously, this device itself also is the device that needs regularly detect, and can't prevent for the fault that occurs between each detection, thereby the reliability and the fail safe that how to improve the protection switch that transfinites has become a problem demanding prompt solution.
Summary of the invention
Shortcoming at prior art; the purpose of this utility model provides a kind ofly can be at any time carry out the protective device that transfinites fail safe, highly versatile, the band self-check system to the protection switch that transfinites, and this self-check system itself also can be realized regular detection certainly.
For achieving the above object; the technical solution of the utility model is: a kind of protective device that transfinites with self-check system; comprise the protection switch that transfinites; the described protection switch that transfinites links to each other with the signal transducer that transfinites; also comprise the double protection switch that links to each other with the described signal transducer that transfinites, with link to each other with described double protection switch and achieve self-monitoring self-detector.Such design; protection switch breaks down in case transfinite; then double protection switch action; can not cause peril, if simultaneously double protection switch action knows that then the protection switch that transfinites breaks down; and; the two-fold protection switch also is provided with self-detector, can carry out detection certainly at any time or regular according to user's needs, makes the reliability of the whole protective device that transfinites greatly improve.
Transfinite between signal transducer and the double protection switch described, also be provided with time-delay mechanism.When overrun condition takes place; through after a while at interval after; transfinite and just start double protection switch when protection switch still is failure to actuate; such design; mainly be not lose efficacy, but in the rationally long time, do not move and cause the fault of the frequent misoperation of double protection switch in order to prevent when the protection switch that transfinite.
Described double protection switch comprises: be used to receive transfinite signal transducer the signal that transfinites testing agency, be used to judge whether the signal that testing agency is transmitted reaches the decision mechanism of action threshold value, and link to each other with decision mechanism be used to cut off the actuator in source of transfiniting.Such design makes testing agency with the detected signal that transfinites, through the judgement of decision mechanism, if transfinite then actuator's action the realization fail safe.
Described testing agency is current transformer or sensitive relay; Decision mechanism is automatic switch or contactor; Actuator is a magnetic switch.
Described self-detector is made up of the series circuit of button switch K 2 and current-limiting resistance R.Button switch K 2 closures are then simulated the signal that transfinites when transfiniting, and current-limiting resistance R flows through excessive electric current in order to prevent in the circuit, simultaneously, when utilizing self-detector to detect, the sensitivity minimization when also being used for determining to detect.
Described current transformer comprises electric current input winding, the electric current output winding and the tertiary winding, described contactor comprises three input pin a, b, c and an output pin d, described input pin a, b is connected to two outputs of the tertiary winding respectively, input pin d is connected to electric current input winding, output pin c connects an end of described magnetic switch electromagnet portion, the other end of described electromagnet portion is connected to electric current output winding, the switch sections K1 of magnetic switch is connected to main circuit, described button switch K that is cascaded 2 and current-limiting resistance R are parallel between input current winding and the output current winding, and the output signal of the described signal transducer that transfinites is through being connected to behind the time-delay mechanism between electric current input winding and the electric current output winding.When the transducer that transfinites provides when transfiniting signal, electric current in electric current input winding and the electric current output winding is unequal, the vector of these two two magnetic fluxs and non-vanishing on current transformer core, then will on the tertiary winding, induce electromotive force, and output on input pin a, the b of contactor, contactor provides output signal of magnetic switch after itself and the threshold value of self setting are compared, and controls the break-make of magnetic switch with this.Described button switch K that is cascaded 2 and current-limiting resistance R are parallel between input current winding and the output current winding, during button switch K 2 closures, and the generation that is used to simulate overrun condition.
Between described testing agency and decision mechanism, also be provided with the signal enlarger.Like this, when the detected signal of testing agency is very faint, give decision mechanism after also amplifying, make it realize judging action accurately by enlarger.
Described signal enlarger is a power amplification circuit.Power amplification circuit is modal signal amplification circuit.
Compared with prior art, the utlity model has following beneficial effect:
The protective device that transfinites of band self-check system of the present utility model is used for the safeguard protection when the contour danger condition of superpressure, overtemperature appears in equipment, owing to behind the common protection switch that transfinites, increased double protection switch, thereby it can carry out fail safe to the protection switch that transfinites at any time, simultaneously can be as required, after being connected to the various signal transducers that transfinite, highly versatile; And also be provided with self-detector on the double protection switch of this protective device that transfinites, thereby itself can be realized also regularly from detecting.
Description of drawings
Fig. 1 is the protective device structured flowchart that transfinites of band self-check system of the present utility model;
Fig. 2 is a wiring schematic diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is described in detail.
As shown in Figure 1; a kind of protective device that transfinites with self-check system; comprise the protection switch that transfinites that transfinites signal transducer and link to each other with the described signal transducer that transfinites; in addition; also comprise the time-delay mechanism that links to each other with the described signal transducer that transfinites; connect double protection switch behind the time-delay mechanism, last, link to each other with described double protection switch in addition and achieve self-monitoring self-detector.When the signal transducer that transfinites sends when transfiniting signal; under the normal condition; the protection switch that transfinites action; the two-fold protection switch is failure to actuate; protection switch still was failure to actuate after a period of time if transfinite; (this time can be set by time-delay mechanism); then being considered as it breaks down; then double protection switch action; correspondingly; if the action of double protection switch, the protection switch that then transfinites as can be known lost efficacy, had both realized the two-fold protection the when protection switch that transfinites lost efficacy; be equivalent to again the protection switch that transfinites has been carried out fault detect; in addition, the user also can realize the regular of double protection switch detected certainly according to the self-detector that connects behind the double protection switch, thereby guarantees the reliability of double protection switch.The two-fold protection switch comprises: be used to receive transfinite signal transducer the signal that transfinites testing agency, be used to judge whether the signal that testing agency is transmitted reaches the decision mechanism of action threshold value, and link to each other with decision mechanism be used to cut off the actuator in source of transfiniting.
As shown in Figure 2, be the circuit diagram of the double protection switch in the present embodiment and its self-detector part, testing agency is a current transformer 6; Decision mechanism is a contactor; Actuator is a magnetic switch.Self-detector is made up of the series circuit of button switch K 2 and current-limiting resistance R.Current transformer 6 comprises electric current input winding 3, the electric current output winding 4 and the tertiary winding 5, contactor comprises three input pin a, b, c and an output pin d, input pin a, b is connected to two outputs of the tertiary winding 5 respectively, input pin d is connected to electric current input winding 3, output pin c connects an end of magnetic switch electromagnet portion 1, the other end of electromagnet portion 1 is connected to electric current output winding, the switch sections 2 of magnetic switch, be that K1 is connected to main circuit, button switch K 2 that is cascaded and current-limiting resistance R are parallel between electric current input winding 3 and the electric current output winding 4, and the output signal of the signal transducer that transfinites is connected between electric current input winding 3 and the electric current output winding 4.
Its course of work is; after the signal transducer that transfinites sends the signal that transfinites; after time-delay mechanism is delayed time a period of time; the protection switch that transfinites does not move yet; then double protection switch begins action; electric current input this moment winding 3; 4 electric currents that flow through are inconsistent in the electric current output winding; the vector of the magnetic flux that produces of two electric currents of this on the iron core of current transformer 6 and non-vanishing then; will on the 3rd winding 5, induce electromotive force; be input to a of contactor; the b input; contactor with its with the inner threshold value that configures in advance relatively after; if surpass threshold value, then output signal is delivered to the input of magnetic switch electromagnet portion 1, the magnetic switch action; be connected to the switch sections 2 on the main circuit, promptly K switch 1 is cut off main circuit.Like this, when playing the protective effect to whole system, also inform the user, the protection switch that transfinites breaks down, and needs to safeguard.
Double protection switch is carried out when detecting the sensitivity minimization in the time of also can determining to detect by the current-limiting resistance R of self-detector; When the button switch K 2 of self-detector is closed; if double protection switch function is normal; the electric current input winding 3 that then is connected in parallel on the self-detector two ends is different with the electric current that electric current output winding 4 flows through; then contactor action; the same magnetic switch that disconnects cuts off main circuit, like this; the user is close push button K switch 2 at any time, realizes the detection certainly to double protection switch.
Certainly, the protective device that transfinites of this band self-check system also can be other structures.When if the detected signal of testing agency is very faint, in order to guarantee the action message of whole device, can also be provided with the signal enlarger between described testing agency and decision mechanism, realize the amplification to signal, the signal enlarger here generally adopts power amplification circuit.In addition, the testing agency of double protection switch also can be sensitive relay, and decision mechanism also can be automatic switch, and such conversion all drops within the protection range of the present utility model.
Claims (8)
1. protective device that transfinites with self-check system; comprise the protection switch that transfinites; the described protection switch that transfinites links to each other with the signal transducer that transfinites, and it is characterized in that: also comprise the double protection switch that links to each other with the described signal transducer that transfinites, link to each other with described double protection switch and achieve self-monitoring self-detector.
2. a kind of protective device that transfinites with self-check system according to claim 1 is characterized in that: transfinite between signal transducer and the double protection switch described, also be provided with time-delay mechanism.
3. a kind of protective device that transfinites according to claim 1 and 2 with self-check system; it is characterized in that: described double protection switch comprises: be used to receive transfinite signal transducer the signal that transfinites testing agency, be used to judge whether the signal that testing agency is transmitted reaches the decision mechanism of action threshold value, and link to each other with decision mechanism be used to cut off the actuator in source of transfiniting.
4. a kind of protective device that transfinites according to claim 3 with self-check system, it is characterized in that: described testing agency is current transformer or sensitive relay; Decision mechanism is automatic switch or contactor; Actuator is a magnetic switch.
5. a kind of protective device that transfinites with self-check system according to claim 1, it is characterized in that: described self-detector is made up of the series circuit of button switch K 2 and current-limiting resistance R.
6. according to claim 2 or 4 or 5 described a kind of protective devices that transfinite with self-check system; it is characterized in that: described current transformer comprises electric current input winding; the electric current output winding and the tertiary winding; described contactor comprises three input pin a; b; c and an output pin d; described input pin a; b is connected to two outputs of the tertiary winding respectively; input pin d is connected to electric current input winding; output pin c connects an end of described magnetic switch electromagnet portion; the other end of described electromagnet portion is connected to electric current output winding; the switch sections K1 of described magnetic switch is connected to main circuit; described button switch K that is cascaded 2 and current-limiting resistance R are parallel between input current winding and the output current winding, and the output signal of the described signal transducer that transfinites is through being connected to behind the time-delay mechanism between electric current input winding and the electric current output winding.
7. a kind of protective device that transfinites with self-check system according to claim 3 is characterized in that: also be provided with the signal enlarger between described testing agency and decision mechanism.
8. a kind of protective device that transfinites with self-check system according to claim 7, it is characterized in that: described signal enlarger is a power amplification circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202369087U CN201498975U (en) | 2009-10-10 | 2009-10-10 | Ultralimit protecting device with self-checking system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202369087U CN201498975U (en) | 2009-10-10 | 2009-10-10 | Ultralimit protecting device with self-checking system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201498975U true CN201498975U (en) | 2010-06-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202369087U Expired - Fee Related CN201498975U (en) | 2009-10-10 | 2009-10-10 | Ultralimit protecting device with self-checking system |
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| Country | Link |
|---|---|
| CN (1) | CN201498975U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106992495A (en) * | 2017-04-20 | 2017-07-28 | 广州市豪尔生医疗设备有限公司 | A kind of earth leakage protective device |
| CN112039015A (en) * | 2020-08-28 | 2020-12-04 | 深圳供电局有限公司 | Alarm information sending device and method, protection device and transformer substation |
-
2009
- 2009-10-10 CN CN2009202369087U patent/CN201498975U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106992495A (en) * | 2017-04-20 | 2017-07-28 | 广州市豪尔生医疗设备有限公司 | A kind of earth leakage protective device |
| CN112039015A (en) * | 2020-08-28 | 2020-12-04 | 深圳供电局有限公司 | Alarm information sending device and method, protection device and transformer substation |
| CN112039015B (en) * | 2020-08-28 | 2023-09-08 | 深圳供电局有限公司 | Alarm information sending device and method, protection device and transformer substation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100602 Termination date: 20121010 |