CN202748461U - System for detecting state of protection pressing plate - Google Patents
System for detecting state of protection pressing plate Download PDFInfo
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- CN202748461U CN202748461U CN201220420129.4U CN201220420129U CN202748461U CN 202748461 U CN202748461 U CN 202748461U CN 201220420129 U CN201220420129 U CN 201220420129U CN 202748461 U CN202748461 U CN 202748461U
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- pressing plate
- protection pressing
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Abstract
The present utility model discloses a system for detecting state of a protection pressing plate. The system comprises a power supply equipment device which comprises at least one power supply equipment, and each power supply equipment is provided with an output end; a protection pressing plate device which at least comprises a protection pressing plate, a first end of each protection pressing plate is connected with the output end of the power supply equipment, a second end is connected with an input end of a voltage routing inspection and control unit, and the protection pressing plate device is used for protecting the power supply equipment; and the voltage routing inspection and control unit comprises at least one input end, each input end is connected with the output end of the power supply equipment through a protection pressing plate respectively, the device is used for measuring measured voltage of the second end of each protection pressing plate and obtaining the working state of the corresponding protection pressing plate according to each measured voltage. In the system for detecting state of the protection pressing plate, working state of the protection pressing plates can be automatically detected in real time.
Description
Technical field
The utility model relates to field tests, in particular to a kind of system for detection of protection pressing plate state.
Background technology
At present; behind the equipment investment of the supply station chambers such as transformer station, Switching Station, need the staff to make an inspection tour; for the protection pressing plate that drops into; the protection personnel are connected whether come closely to determine by adopting direct observation pressing plate to connect whether this power distribution cabinet protection pressing plate correctly drops into the tour personnel, or the outlet voltage that directly utilizes multimeter to pass through measuring and protecting pressing plate two ends determines whether the protection pressing plate drops into.Both of these case; the undiscovered situation generation of staff the actual access failure of pressing plate or loose contact etc. appear and in the capital; in addition; because the limitation in the cycle of tour; electric power operation department can not find constantly first after loosening phenomenon occurs the protection pressing plate; can only after operations staff's tour work, just may pinpoint the problems; do not find that pressing plate reality do not drop into during this period of time in; power-supply unit is actual to be to move under the condition that lacks this protection pressing plate relay protection; thereby bring larger accident potential; especially do not find to protect in the situation that pressing plate reality do not drop into the staff; may be when circuit breaks down overstep tripping, thereby the coverage of expansion accident.
Yet; in service at present electric system second protection equipment; often the protection pressing plate appears owing to be exposed to all the year round oxidation and dust cause in the air loose contact or the phenomenon such as virtual connection; add the not input situation that in time to know the protection pressing plate, the normal operation of electric system has been brought very large hidden danger.
For whether entering duty owing to can not in time, accurately know the protection pressing plate in the prior art, and the problem of the electric power safety industrial accident that brings not yet proposes effective solution at present.
The utility model content
Whether enter duty for correlation technique owing to can not be able to not in time, accurately know the protection pressing plate; and the problem of the electric power safety industrial accident that brings; effective solution is not yet proposed at present; for this reason; fundamental purpose of the present utility model is to provide a kind of system for detection of protection pressing plate state, to address the above problem.
To achieve these goals, according to an aspect of the present utility model, provide a kind of system for detection of protection pressing plate state, this system comprises: the power-supply unit device, comprise at least one power-supply unit, and each power-supply unit has an output terminal; The protection presser device comprises at least one protection pressing plate, and the first end of each protection pressing plate is connected with the output terminal of a power-supply unit, and the second end is connected with an input end of voltage polling control module, for the protection of power-supply unit; The voltage polling control device; comprise at least one input end; each input end connects by the output terminal of a protection pressing plate and a power-supply unit respectively; be used for measuring the measuring voltage that each protects the second end of pressing plate, and obtain with it the duty of corresponding protection pressing plate according to each measuring voltage.
Further, system also comprises: supervising device, input end and voltage polling control device connect, and are used for obtaining the duty of each protection pressing plate, check for the user.
Further, the voltage polling control device also comprises: measuring instrument, and protect the second end of pressing plate to connect with each, be used for measuring the voltage of each protection pressing plate the second end, to obtain the measuring voltage of each protection pressing plate; Processor is connected with measuring instrument, is used for judging whether the predeterminated voltage of each measuring voltage and corresponding with it protection pressing plate conforms to the working state signal of protecting pressing plate to generate each; Transmitter is connected with processor, is used for all working status signal is sent to supervising device.
Further, processor comprises: comparer, be connected with measuring instrument, and be used for judging whether the predeterminated voltage of each measuring voltage and corresponding with it protection pressing plate conforms to; The first sub-processor is connected with comparer, is used for generating the working state signal of protecting pressing plate not devote oneself to work in the situation that the predeterminated voltage at measuring voltage and corresponding with it protection pressing plate do not conform to; The second sub-processor is connected with comparer, is used for generating the working state signal of protecting pressing plate to devote oneself to work in the situation that the predeterminated voltage at measuring voltage and corresponding with it protection pressing plate conforms to.
Further, the voltage polling control device also comprises: warning device, connect with processor, and comprise and the corresponding pilot lamp of each protection pressing plate, be used for sending the do not devote oneself to work alarm of state of protection pressing plate.
Further, warning device also comprises: receiving trap, connect with processor, and be used for receiving the working state signal of each protection pressing plate; Treating apparatus is connected with receiving trap, is used for obtaining the protection pressing plate of not devoting oneself to work according to the working state signal that receives, to generate protection pressing plate collection; Dispensing device is connected with treating apparatus, is used for by concentrating the corresponding pilot lamp of each protection pressing plate to give the alarm with the protection pressing plate.
Further, the voltage polling control device also comprises: storer, be connected with processor, and be used for the working state signal of each protection pressing plate of storage.
Further, system also comprises: the dispatching and monitoring device, connect with supervising device, and be used for obtaining the working state signal of each protection pressing plate.
Further, each protection pressing plate comprises: switchgear, first end are as the first end of protection pressing plate, and second segment is as the second end of protection pressing plate.
Further, system also comprises: protective device, input end connects with the protection presser device, is used for by protection presser device protection power-supply unit.
The system for detection of protection pressing plate state that provides by the utility model; adopt the voltage polling control device to detect the voltage of the second end of each protection pressing plate in the protection presser device; judge each protection pressing plate state of whether devoting oneself to work; solved in the prior art because can not can not be timely; accurately know and protect pressing plate not devote oneself to work; and the problem of the electric power safety industrial accident that brings; realized automatically detecting in real time the effect of the duty of protection pressing plate; improved the efficient of the duty of staff's check protection pressing plate; prevent the generation of the situation of judging by accident; eliminated because of the protection pressing plate and should devote oneself to work but the potential safety hazard of the power-supply unit that the loose contact of protection pressing plate brings after not dropping into or dropping into has made things convenient for operation and dispatcher's work.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present utility model, consists of the application's a part, and illustrative examples of the present utility model and explanation thereof are used for explaining the utility model, do not consist of improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the structural representation for detection of the system that protects the pressing plate state according to the utility model embodiment; And
Fig. 2 is according to the detailed construction synoptic diagram for detection of the system that protects the pressing plate state shown in Figure 1.
Embodiment
Need to prove that in the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.Describe below with reference to the accompanying drawings and in conjunction with the embodiments the utility model in detail.
Fig. 1 is the structural representation for detection of the system that protects the pressing plate state according to the utility model embodiment.Fig. 2 is according to the detailed construction synoptic diagram for detection of the system that protects the pressing plate state shown in Figure 1.
As depicted in figs. 1 and 2, this system comprises: power-supply unit device 10, comprise at least one power-supply unit, and each power-supply unit has an output terminal; Protection presser device 30 comprises at least one protection pressing plate, and the first end of each protection pressing plate is connected with the output terminal of a power-supply unit, and the second end is connected with an input end of voltage polling control module, for the protection of power-supply unit; Voltage polling control device 50; comprise at least one input end; each input end connects by the output terminal of a protection pressing plate and a power-supply unit respectively; be used for measuring the measuring voltage that each protects the second end of pressing plate, and obtain with it the duty of corresponding protection pressing plate according to each measuring voltage.
Adopt the system for detection of protection pressing plate state of the present utility model; by protecting each protection second end of pressing plate in the presser device and the input end of voltage polling control device to connect; then the voltage polling control device is measured the measuring voltage of the second end of each protection pressing plate; and obtain with it the duty whether corresponding protection pressing plate devotes oneself to work according to each measuring voltage; because in the prior art; whether detect the protection pressing plate by manual inspection devotes oneself to work; have and miss the protection pressing plate of not devoting oneself to work; perhaps untimely to what do not have in harness protection pressing plate to detect; and can bring the power outage of supply line; and the system for detection of protection pressing plate state that the application provides; detect the voltage of the second end of each protection pressing plate in the protection presser device by the voltage polling control device; judge each protection pressing plate state of whether devoting oneself to work; solved in the prior art because can not can not be timely; know accurately whether the protection pressing plate enters duty; and the problem of the electric power safety industrial accident that brings; realized automatically detecting in real time the effect of the duty of protection pressing plate; improved the efficient of the duty of staff's check protection pressing plate; prevent the generation of the situation of judging by accident; eliminated because of the protection pressing plate and should devote oneself to work but the potential safety hazard of the power-supply unit that the loose contact of protection pressing plate brings after not dropping into or dropping into has made things convenient for operation and dispatcher's work.
As shown in Figure 2; power-supply unit device 10 comprises N equipment, and then power-supply unit device 10 has N output terminal, and corresponding protection presser device 30 comprises the N corresponding with each power-supply unit protection pressing plate; similarly, voltage polling control device 50 comprises N input end.
According to above-described embodiment of the present utility model, system can also comprise: supervising device 70, input end and voltage polling control device 50 connect, and are used for obtaining the duty of each protection pressing plate, check for the user.
Particularly, the working state signal of protection pressing plate is connected with supervising device 70 by the RS485 communication interface.The second broken ends of fractured bone voltage by 50 pairs of protection pressing plates of voltage polling control device detects in real time; then get access to the duty of protection pressing plate according to the measuring voltage that detects; supervising device 70 obtain the protection pressing plate duty and with its demonstration; check for the user; preferably; when the protection pressing plate that should devote oneself to work was not normally devoted oneself to work, supervising device 70 sent warning, and the operating status record of energy reservation protection pressing plate.Wherein, the dispatcher can prevent from protecting pressing plate virtual connection or the not situation generation of input by the duty of supervising device 70 inquiry protection pressing plates, has improved security and the power supply reliability of Operation of Electric Systems.
In above-described embodiment of the application, voltage polling control device 50 can also comprise: measuring instrument, and protect the second end of pressing plate to connect with each, be used for measuring the voltage of each protection pressing plate the second end, to obtain the measuring voltage of each protection pressing plate; Processor is connected with measuring instrument, is used for judging whether the predeterminated voltage of each measuring voltage and corresponding with it protection pressing plate conforms to the working state signal of protecting pressing plate to generate each; Transmitter is connected with processor, is used for all working status signal is sent to supervising device 70.As shown in Figure 2, predeterminated voltage can be the voltage in the supply line that of protection pressing plate, and the voltage of the protection first end of pressing plate and the second end is generally identical, and the voltage in the general supply line is 50V or 110V.
According to above-described embodiment of the present utility model, processor can comprise: comparer, be connected with measuring instrument, and be used for judging whether the predeterminated voltage of each measuring voltage and corresponding with it protection pressing plate conforms to; The first sub-processor is connected with comparer, is used for generating the working state signal of protecting pressing plate not devote oneself to work in the situation that the predeterminated voltage at measuring voltage and corresponding with it protection pressing plate do not conform to; The second sub-processor is connected with comparer, is used for generating the working state signal of protecting pressing plate to devote oneself to work in the situation that the predeterminated voltage at measuring voltage and corresponding with it protection pressing plate conforms to.
Particularly; whether the measuring voltage of the protection pressing plate that will measure by comparer conforms to predeterminated voltage; then the first sub-processor and the second sub-processor are according to the result of comparer processing; obtain the working state signal of protection pressing plate; wherein; when the measuring voltage of protection pressing plate the second end conforms to predeterminated voltage; this protection pressing plate is devoted oneself to work; when the measuring voltage of protection pressing plate the second end does not conform to predeterminated voltage; this protection pressing plate is not devoted oneself to work, and then this protection pressing plate may loose contact or just do not devoted oneself to work at all.
According to above-described embodiment of the application, voltage polling control device 50 can also comprise: warning device 60, connect with processor, and comprise and the corresponding pilot lamp of each protection pressing plate, be used for sending the do not devote oneself to work alarm of state of protection pressing plate.Particularly; warning device 60 is according to the working state signal of the protection pressing plate that gets access to; obtain the protection pressing plate collection of not devoting oneself to work, then by concentrating the corresponding pilot lamp of each protection pressing plate with this protection pressing plate, send the alarm that this protection pressing plate is not devoted oneself to work.As shown in Figure 2, can comprise N pilot lamp in the warning device 60.
In above-described embodiment of the present utility model, warning device 60 can also comprise: receiving trap, connect with processor, and be used for receiving the working state signal of each protection pressing plate; Treating apparatus is connected with receiving trap, is used for obtaining the protection pressing plate of not devoting oneself to work according to the working state signal that receives, to generate protection pressing plate collection; Dispensing device is connected with treating apparatus, is used for by concentrating the corresponding pilot lamp of each protection pressing plate to give the alarm with the protection pressing plate.
Particularly; voltage polling control device 50 obtains the duty of each protection pressing plate by the voltage that detects the second end of protecting pressing plate; if detecting the measuring voltage of the second end of protection pressing plate, voltage polling control device 50 do not conform to the default operating voltage of this protection pressing plate; then this protection pressing plate is not devoted oneself to work this moment; the situation that perhaps after input, has loose contact or virtual connection; when the protection pressing plate is in the state of not devoting oneself to work; the pilot lamp flicker corresponding with this protection pressing plate reminds the on-the-spot personnel inspection of making an inspection tour to protect accordingly pressing plate.
According to above-described embodiment of the application, voltage polling control device 50 can also comprise: storer, be connected with processor, and be used for the working state signal of each protection pressing plate of storage.By the working state signal of each protection pressing plate of memory stores, can with the object of the protection pressing plate of not devoting oneself to work main monitor when patrolling later on, can shorten the servicing time in later stage.
According to above-described embodiment of the present utility model, this system can also comprise: dispatching and monitoring device 90, connect with supervising device 70, and be used for obtaining the working state signal of each protection pressing plate.Particularly, will protect the working state signal of each the protection pressing plate in the presser device 30 to be sent to dispatching and monitoring device 90 supervising device 70 by Optical Fiber Transmission, realize the Real Time Monitoring of a distant place to protection pressing plate state, convenient operation and dispatcher's work.
In above-described embodiment of the present utility model, each protection pressing plate can comprise: switchgear, first end are as the first end of protection pressing plate, and second segment is as the second end of protection pressing plate.Particularly, the protection pressing plate can be realized by switch.
According to above-described embodiment of the application, system can also comprise: protective device, input end connects with protection presser device 30, is used for by protection presser device 30 protection power-supply units.Wherein, the input end of protective device comprises the connection terminal corresponding with the second end of each protection pressing plate.As shown in Figure 2; the first end of protection pressing plate is normal electriferous state; different operating voltage according to protection pressing plate in the protection presser device 30 is set different predeterminated voltages in voltage polling control device 50; the input voltage of the first end of general protection pressing plate is+55V(or+110V); in the situation that the protection pressing plate is not devoted oneself to work; its second end is not charged; and there is not voltage; after the protection pressing plate is devoted oneself to work; the voltage of protection pressing plate the second end should be+55V(or+110); in the situation that the protection pressing plate is devoted oneself to work; when protective device sends trip command; 55V(or 110V in the corresponding power-supply unit circuit) with+55V(or+110) connect trip(ping) circuit, trigger corresponding isolating switch and disconnect institute's band power-supply unit, if protect pressing plate do not devote oneself to work (virtual connection or do not connect) this moment; then can not form trip(ping) circuit; the isolating switch that causes disconnecting can not disconnect, thereby will cause higher level's power source trip, enlarges power failure range and causes the electric power safety industrial accident.The voltage polling control device 50 that the application provides can detect the voltage of second end (being endpiece) of protection presser device 30 in real time; to obtain the duty of each protection pressing plate; accurately and timely learn the protection pressing plate of not devoting oneself to work; give the alarm, process for the staff.
From above description; can find out; the utility model has been realized following technique effect: the system for detection of protection pressing plate state that the utility model provides; detect the voltage of the second end of each protection pressing plate in the protection presser device by the voltage polling control device; judge each protection pressing plate state of whether devoting oneself to work: do not conform to the operating voltage of presetting of this protection pressing plate if the voltage polling control device detects the measuring voltage of the second end of protection pressing plate; then this protection pressing plate is not devoted oneself to work this moment; the situation that perhaps after input, has loose contact or virtual connection; when the protection pressing plate is in the state of not devoting oneself to work; the pilot lamp flicker corresponding with this protection pressing plate; remind the on-the-spot personnel inspection of making an inspection tour to protect accordingly pressing plate; pressing plate input signal is connected with supervising device by communication interface simultaneously; then transmit signals to the dispatching and monitoring device; realized the Real Time Monitoring of a distant place to the pressing plate state; solved in the prior art because can not can not be timely; accurately know and protect pressing plate not devote oneself to work; and the problem of the electric power safety industrial accident that brings; realized automatically detecting in real time the effect of the duty of protection pressing plate; improved the efficient of the duty of staff's check protection pressing plate; prevent the generation of the situation of judging by accident; eliminated because of the protection pressing plate and should devote oneself to work but the potential safety hazard of the power-supply unit that the loose contact of protection pressing plate brings after not dropping into or dropping into has made things convenient for operation and dispatcher's work.
The above is preferred embodiment of the present utility model only, is not limited to the utility model, and for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (10)
1. the system for detection of protection pressing plate state is characterized in that, comprising:
The power-supply unit device comprises at least one power-supply unit, and each described power-supply unit has an output terminal;
The protection presser device comprises at least one protection pressing plate, and the first end of each described protection pressing plate is connected with the output terminal of a described power-supply unit, and the second end is connected with an input end of voltage polling control module, for the protection of described power-supply unit;
Described voltage polling control device; comprise at least one input end; each input end connects by the output terminal of a described protection pressing plate and a described power-supply unit respectively; be used for the measuring voltage of the second end of each described protection pressing plate of measurement, and obtain with it the duty of corresponding protection pressing plate according to each described measuring voltage.
2. system according to claim 1 is characterized in that, described system also comprises:
Supervising device, input end and described voltage polling control device connect, and are used for obtaining the duty of each described protection pressing plate, check for the user.
3. system according to claim 2, it is characterized in that described voltage polling control device also comprises: measuring instrument connects with the second end of each described protection pressing plate, be used for measuring the voltage of each described protection pressing plate the second end, to obtain the measuring voltage of each described protection pressing plate;
Processor is connected with described measuring instrument, is used for judging whether the predeterminated voltage of each described measuring voltage and corresponding with it described protection pressing plate conforms to, to generate the working state signal of each described protection pressing plate;
Transmitter is connected with described processor, is used for all described working state signals are sent to described supervising device.
4. system according to claim 3 is characterized in that, described processor comprises:
Comparer is connected with described measuring instrument, is used for judging whether the predeterminated voltage of each described measuring voltage and corresponding with it described protection pressing plate conforms to;
The first sub-processor is connected with described comparer, is used for generating the working state signal that described protection pressing plate is not devoted oneself to work in the situation that the predeterminated voltage at described measuring voltage and corresponding with it described protection pressing plate do not conform to;
The second sub-processor is connected with described comparer, is used for generating the working state signal that described protection pressing plate is devoted oneself to work in the situation that the predeterminated voltage at described measuring voltage and corresponding with it described protection pressing plate conforms to.
5. system according to claim 4 is characterized in that, described voltage polling control device also comprises:
Warning device connects with described processor, comprises the pilot lamp corresponding with each described protection pressing plate, is used for sending the do not devote oneself to work alarm of state of described protection pressing plate.
6. system according to claim 5 is characterized in that, described warning device also comprises:
Receiving trap connects with described processor, is used for receiving the working state signal of each described protection pressing plate;
Treating apparatus is connected with described receiving trap, is used for obtaining the protection pressing plate of not devoting oneself to work according to the described working state signal that receives, to generate protection pressing plate collection;
Dispensing device is connected with described treating apparatus, is used for by concentrating the corresponding described pilot lamp of each protection pressing plate to give the alarm with described protection pressing plate.
7. system according to claim 6 is characterized in that, described voltage polling control device also comprises:
Storer is connected with described processor, is used for the working state signal of each described protection pressing plate of storage.
8. system according to claim 7 is characterized in that, described system also comprises:
The dispatching and monitoring device connects with described supervising device, is used for obtaining the working state signal of each described protection pressing plate.
9. system according to claim 8 is characterized in that, each described protection pressing plate comprises:
Switchgear, first end are as the first end of described protection pressing plate, and second segment is as the second end of described protection pressing plate.
10. the described system of any one in 9 according to claim 1 is characterized in that described system also comprises:
Protective device, input end and described protection presser device connect, and are used for protecting described power-supply unit by described protection presser device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220420129.4U CN202748461U (en) | 2012-08-22 | 2012-08-22 | System for detecting state of protection pressing plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220420129.4U CN202748461U (en) | 2012-08-22 | 2012-08-22 | System for detecting state of protection pressing plate |
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| Publication Number | Publication Date |
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| CN202748461U true CN202748461U (en) | 2013-02-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201220420129.4U Expired - Lifetime CN202748461U (en) | 2012-08-22 | 2012-08-22 | System for detecting state of protection pressing plate |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103439651A (en) * | 2013-08-16 | 2013-12-11 | 长园共创电力安全技术股份有限公司 | Pressing plate sensor |
| CN103901263A (en) * | 2014-04-22 | 2014-07-02 | 国家电网公司 | Pressing plate detection circuit and PCB |
| CN110618335A (en) * | 2019-10-15 | 2019-12-27 | 云南电网有限责任公司保山供电局 | Electric power is with multi-functional protection detection clamp plate device |
| CN111638053A (en) * | 2020-06-19 | 2020-09-08 | 长园共创电力安全技术股份有限公司 | Pressing plate state detection system, method and device and pressing plate |
| CN116381396A (en) * | 2023-06-05 | 2023-07-04 | 广东电网有限责任公司佛山供电局 | Intelligent monitoring system for transformer substation outlet pressing plate |
-
2012
- 2012-08-22 CN CN201220420129.4U patent/CN202748461U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103439651A (en) * | 2013-08-16 | 2013-12-11 | 长园共创电力安全技术股份有限公司 | Pressing plate sensor |
| CN103439651B (en) * | 2013-08-16 | 2016-04-27 | 长园共创电力安全技术股份有限公司 | Platen sensor |
| CN103901263A (en) * | 2014-04-22 | 2014-07-02 | 国家电网公司 | Pressing plate detection circuit and PCB |
| CN110618335A (en) * | 2019-10-15 | 2019-12-27 | 云南电网有限责任公司保山供电局 | Electric power is with multi-functional protection detection clamp plate device |
| CN111638053A (en) * | 2020-06-19 | 2020-09-08 | 长园共创电力安全技术股份有限公司 | Pressing plate state detection system, method and device and pressing plate |
| CN111638053B (en) * | 2020-06-19 | 2022-03-18 | 长园共创电力安全技术股份有限公司 | Pressing plate state detection system, method and device and pressing plate |
| CN116381396A (en) * | 2023-06-05 | 2023-07-04 | 广东电网有限责任公司佛山供电局 | Intelligent monitoring system for transformer substation outlet pressing plate |
| CN116381396B (en) * | 2023-06-05 | 2023-10-27 | 广东电网有限责任公司佛山供电局 | Intelligent monitoring system for transformer substation outlet pressing plate |
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Granted publication date: 20130220 |
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