CN203655789U - Testing system of pilot load control valve - Google Patents
Testing system of pilot load control valve Download PDFInfo
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- CN203655789U CN203655789U CN201420013829.0U CN201420013829U CN203655789U CN 203655789 U CN203655789 U CN 203655789U CN 201420013829 U CN201420013829 U CN 201420013829U CN 203655789 U CN203655789 U CN 203655789U
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Abstract
The utility model discloses a testing system of a pilot load control valve. The testing system comprises a main oil line hydraulic pump, a pilot oil line hydraulic pump, a proportional overflow valve, a manual overflow valve, a pilot two-way cartridge valve, a main oil line pilot reversing valve, a proportional pressure reducing valve, a pilot oil line pilot reversing valve, a manual direction valve, a tested load control valve, a load pressure transmitter, an oil return pressure transmitter, a control pressure transmitter, a flow meter, a power amplifying device, a data collecting card, a computer, a main step module and a pilot step module. With use of the testing system disclosed by the utility model, comprehensive testing on a unidirectional conducting characteristic, a load pressure-flow characteristic, a control pressure-flow characteristic, a load pressure step characteristic and a control pressure step characteristic of the pilot load control valve can be accomplished.
Description
Technical field
The utility model relates to hydraulic pilot valve system, especially relates to a kind of pilot system of leading type load control valve.
Background technique
In the hydraulic system applications such as the machinery that hoists, hydraulic wireline winch and various engineering machinery, can often there is the situation that load force direction is consistent with the load movement direction of needs, this kind of load is called as and surmounts load (negative load).Bear the hydraulic system that surmounts load, need to have special control valve to control from the flow of the hydraulic oil in load flow oil return source, this kind of control valve is commonly referred to as load control valve or equilibrium valve.
But, because current China does not have country and the professional standard of the pilot system of clear and definite load control valve, for the test of load control valve exist each producer, research institution's test method is different with system.And often each producer and research institution pilot system separately can only be tested a part of performance of load control valve, can not there is a complete test to the various performance parameters of load control valve.
In view of this, application new principle and method, the pilot system of a load control valve of design, has very important practical meaning in engineering thereby can complete to the complete test of load control valve various performance parameters.
Summary of the invention
In order to overcome the test problem of the leading type load control valve existing in background technique, the utility model provides the pilot system of a set of leading type load control valve, can complete the complete test to leading type load control valve various performance parameters.
The technical solution adopted in the utility model is:
The utility model comprises working connection oil hydraulic pump, guide's oil circuit oil hydraulic pump, proportional pressure control valve, manually relief valve, guide's two-way plug-in valve, working connection pilot reversing valve, proportional pressure-reducing valve, guide's oil circuit pilot reversing valve, manually directional control valve, tested load control valve, induced pressure transmitter, return pressure transmitter, pilot pressure transmitter, flowmeter, power amplifier device, data collecting card and computer.
The oil outlet of working connection oil hydraulic pump is connected with the pressure hydraulic fluid port P9 of manual directional control valve, and bypass connects the oil inlet P 3 of proportional pressure control valve and the filler opening A5 of guide's two-way plug-in valve, manually the actuator port A9 of directional control valve and the load hydraulic fluid port B of tested load control valve are connected, the return opening A of tested load control valve is connected with the actuator port B9 of manual directional control valve, manually the oil return inlet T 9 of directional control valve is connected with the filler opening of flowmeter, and the return opening of flowmeter is connected with fuel tank.
The oil outlet of guide's oil circuit oil hydraulic pump is connected with the pressure hydraulic fluid port P7 of proportional pressure-reducing valve, and bypass connects the oil inlet P 4 of manual relief valve and the pressure hydraulic fluid port P6 of working connection pilot reversing valve, the oil return inlet T 7 of proportional pressure-reducing valve is connected with fuel tank, the actuator port A7 of proportional pressure-reducing valve is connected with guide's hydraulic fluid port X of tested load control valve, and the actuator port A8 that bypass connects guide's oil circuit pilot reversing valve is connected, the pressure hydraulic fluid port P8 of guide's oil circuit pilot reversing valve blocks, the oil return inlet T 8 of guide's oil circuit pilot reversing valve is connected with fuel tank, working connection pilot reversing valve oil return inlet T 6 is connected with fuel tank, working connection pilot reversing valve actuator port A6 is connected with the control port X5 of guide's two-way plug-in valve, working connection pilot reversing valve actuator port B6 blocks.
Induced pressure transmitter is connected with the load hydraulic fluid port B of tested load control valve, and return pressure transmitter is connected with the return opening A of tested load control valve, and pilot pressure transmitter is connected with guide's hydraulic fluid port X of tested load control valve; The signal output part of induced pressure transmitter, return pressure transmitter, pilot pressure transmitter and flowmeter is all connected with the analog input mouth of data collecting card, data collecting card is arranged on the mainboard of computer and carries out communication with computer, the digital output end of data collecting card is connected with the input end of power amplifier device, and the output terminal of power amplifier device is connected with proportional pressure control valve, working connection pilot reversing valve, proportional pressure-reducing valve and the proportion electro-magnet of guide's oil circuit step pilot reversing valve respectively; The digital output DO1 of data collecting card is connected with main step module, and the digital output DO2 of data collecting card is connected with guide's step module.
Described main step module, comprises main step circuit triode, main step circuit relay, main step circuit diode, main step circuit input resistance R1, main step circuit pull-up resistor R2, main step circuit dead resistance R3 and working connection pilot reversing valve electromagnet YA1, the digital output DO1 of data collecting card is connected with one end of main step circuit input resistance R1, the other end of main step circuit input resistance R1 is connected with the base stage of main step circuit triode, the collector electrode of main step circuit triode is connected with the input anode of main step circuit relay, be connected the emitter of main step circuit triode and power supply, the input anode of main step circuit relay is connected with positive source by main step circuit pull-up resistor R2, be connected the input cathode of main step circuit relay and power supply, the output head anode of main step circuit relay is connected with positive source, the negative pole of output end of main step circuit relay is connected with the negative pole of main step circuit diode, the positive pole of main step circuit diode by main step circuit dead resistance R3 and power supply be connected, one end of working connection pilot reversing valve electromagnet YA1 is connected with the negative pole of output end of main step circuit relay, be connected the other end of working connection pilot reversing valve electromagnet YA1 and power supply.
Described guide's step module, comprises guide's step circuit triode, guide's step circuit relay, guide's step circuit diode, guide's step circuit input resistance R4, guide's step circuit pull-up resistor R5, guide's step circuit dead resistance R6 and guide's oil circuit pilot reversing valve electromagnet YA2; jump one end of circuit input resistance R4 of digital output DO2 and the guide of data collecting card is connected, the other end of guide's step circuit input resistance R4 is connected with the base stage of guide's step circuit triode, the collector electrode of guide's step circuit triode is connected with the input anode of guide's step circuit relay, be connected the emitter of guide's step circuit triode and power supply, the input anode of guide's step circuit relay is connected with positive source by guide's step circuit pull-up resistor R5, be connected the input cathode of guide's step circuit relay and power supply, the output head anode of guide's step circuit relay is connected with positive source, the negative pole of output end of guide's step circuit relay is connected with the negative pole of guide's step circuit diode, the positive pole of guide's step circuit diode by guide's step circuit dead resistance R6 and power supply be connected, one end of guide's oil circuit pilot reversing valve electromagnet YA2 is connected with the negative pole of output end of guide's step circuit relay, be connected the other end of guide's oil circuit pilot reversing valve electromagnet YA2 and power supply.
When working connection step pilot reversing valve original position, its pressure hydraulic fluid port P6 communicates with actuator port A6, thereby makes guide's two-way plug-in valve in closed condition.
When guide's oil circuit step pilot reversing valve original position, its pressure hydraulic fluid port P8 communicates with actuator port A8, makes guide's hydraulic fluid port X of tested load control valve in upper pressure condition.
The beneficial effect the utlity model has is:
The pilot system of the disclosed leading type load control valve of the utility model, one-way conduction characteristic, induced pressure-Flow characteristics, pilot pressure-Flow characteristics, induced pressure step response, the pilot pressure step response that can complete leading type load control valve are comprehensively tested.
Brief description of the drawings
Fig. 1 is schematic diagram of the present utility model.
Fig. 2 is the schematic diagram of the control circuit part of the utility model to electromagnet YA1 and YA2.
In figure: 1, working connection oil hydraulic pump, 2, guide's oil circuit oil hydraulic pump, 3, proportional pressure control valve, 4, manually relief valve, 5, guide's two-way plug-in valve, 6, working connection pilot reversing valve, 7, proportional pressure-reducing valve, 8, guide's oil circuit pilot reversing valve, 9, manually directional control valve, 10, tested load control valve, 11, induced pressure transmitter, 12, return pressure transmitter, 13, pilot pressure transmitter, 14, flowmeter, 15, power amplifier device, 16, data collecting card, 17, computer, 18, main step circuit triode, 19, main step circuit relay, 20, main step circuit diode, 21, guide's step circuit triode, 22, guide's step circuit relay, 23, guide's step circuit diode, R1, main step circuit input resistance, R2, main step circuit pull-up resistor, R3, main step circuit dead resistance, R4, guide's step circuit input resistance, R5, guide's step circuit pull-up resistor, R6, guide's step circuit dead resistance, YA1, working connection pilot reversing valve electromagnet, YA2, guide's oil circuit pilot reversing valve electromagnet.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.
As shown in Figure 1, the utility model comprises working connection oil hydraulic pump 1, guide's oil circuit oil hydraulic pump 2, proportional pressure control valve 3, manually relief valve 4, guide's two-way plug-in valve 5, working connection pilot reversing valve 6, proportional pressure-reducing valve 7, guide's oil circuit pilot reversing valve 8, manually directional control valve 9, tested load control valve 10, induced pressure transmitter 11, return pressure transmitter 12, pilot pressure transmitter 13, flowmeter 14, power amplifier device 15, data collecting card 16 and computer 17.
The oil outlet of working connection oil hydraulic pump 1 is connected with the pressure hydraulic fluid port P9 of manual directional control valve 9, and bypass connects the oil inlet P 3 of proportional pressure control valve 3 and the filler opening A5 of guide's two-way plug-in valve 5, manually the actuator port A9 of directional control valve 9 and the load hydraulic fluid port B of tested load control valve 10 are connected, the return opening A of tested load control valve 10 is connected with the actuator port B9 of manual directional control valve 9, manually the oil return inlet T 9 of directional control valve 9 is connected with the filler opening of flowmeter 14, and the return opening of flowmeter 14 is connected with fuel tank.
The oil outlet of guide's oil circuit oil hydraulic pump 2 is connected with the pressure hydraulic fluid port P7 of proportional pressure-reducing valve 7, and bypass connects the oil inlet P 4 of manual relief valve 4 and the pressure hydraulic fluid port P6 of working connection pilot reversing valve 6, the oil return inlet T 7 of proportional pressure-reducing valve 7 is connected with fuel tank, the actuator port A7 of proportional pressure-reducing valve 7 is connected with guide's hydraulic fluid port X of tested load control valve 10, and the actuator port A8 that bypass connects guide's oil circuit pilot reversing valve 8 is connected, the pressure hydraulic fluid port P8 of guide's oil circuit pilot reversing valve 8 blocks, the oil return inlet T 8 of guide's oil circuit pilot reversing valve 8 is connected with fuel tank, working connection pilot reversing valve 6 oil return inlet T 6 are connected with fuel tank, working connection pilot reversing valve 6 actuator port A6 are connected with the control port X5 of guide's two-way plug-in valve 5, working connection pilot reversing valve 6 actuator port B6 block.
Induced pressure transmitter 11 is connected with the load hydraulic fluid port B of tested load control valve 10, and return pressure transmitter 12 is connected with the return opening A of tested load control valve 10, and pilot pressure transmitter 13 is connected with guide's hydraulic fluid port X of tested load control valve 10; The signal output part of induced pressure transmitter 11, return pressure transmitter 12, pilot pressure transmitter 13 and flowmeter 14 is all connected with the analog input mouth of data collecting card 16, data collecting card 16 is arranged on the mainboard of computer 17 and carries out communication with computer 17, the digital output end of data collecting card is connected with the input end of power amplifier device 15, and the output terminal of power amplifier device 15 is connected with proportional pressure control valve 3, working connection pilot reversing valve 6, proportional pressure-reducing valve 7 and the proportion electro-magnet of guide's oil circuit step pilot reversing valve 8 respectively; The digital output DO1 of data collecting card 16 is connected with main step module, and the digital output DO2 of data collecting card 16 is connected with guide's step module.
As shown in Figure 2, described main step module, comprises main step circuit triode 18, main step circuit relay 19, main step circuit diode 20, main step circuit input resistance R1, main step circuit pull-up resistor R2, main step circuit dead resistance R3 and working connection pilot reversing valve electromagnet YA1; the digital output DO1 of data collecting card 16 is connected with one end of main step circuit input resistance R1, the other end of main step circuit input resistance R1 is connected with the base stage of main step circuit triode 18, the collector electrode of main step circuit triode 18 is connected with the input anode of main step circuit relay 19, be connected the emitter of main step circuit triode 18 and power supply, the input anode of main step circuit relay 19 is connected with positive source by main step circuit pull-up resistor R2, be connected the input cathode of main step circuit relay 19 and power supply, the output head anode of main step circuit relay 19 is connected with positive source, the negative pole of output end of main step circuit relay 19 is connected with the negative pole of main step circuit diode 20, the positive pole of main step circuit diode 20 by main step circuit dead resistance R3 and power supply be connected, one end of working connection pilot reversing valve electromagnet YA1 is connected with the negative pole of output end of main step circuit relay 19, be connected the other end of working connection pilot reversing valve electromagnet YA1 and power supply.
As shown in Figure 2, described guide's step module, comprises guide's step circuit triode 21, guide's step circuit relay 22, guide's step circuit diode 23, guide's step circuit input resistance R4, guide's step circuit pull-up resistor R5, guide's step circuit dead resistance R6 and guide's oil circuit pilot reversing valve electromagnet YA2; jump one end of circuit input resistance R4 of digital output DO2 and the guide of data collecting card 16 is connected, the other end of guide's step circuit input resistance R4 is connected with the base stage of guide's step circuit triode 21, the collector electrode of guide's step circuit triode 21 is connected with the input anode of guide's step circuit relay 22, be connected the emitter of guide's step circuit triode 21 and power supply, the input anode of guide's step circuit relay 22 is connected with positive source by guide's step circuit pull-up resistor R5, be connected the input cathode of guide's step circuit relay 22 and power supply, the output head anode of guide's step circuit relay 22 is connected with positive source, the negative pole of output end of guide's step circuit relay 22 is connected with the negative pole of guide's step circuit diode 23, the positive pole of guide's step circuit diode 23 by guide's step circuit dead resistance R6 and power supply be connected, one end of guide's oil circuit pilot reversing valve electromagnet YA2 is connected with the negative pole of output end of guide's step circuit relay 22, be connected the other end of guide's oil circuit pilot reversing valve electromagnet YA2 and power supply.
When working connection step pilot reversing valve 6 original position, its pressure hydraulic fluid port P6 communicates with actuator port A6, thereby makes guide's two-way plug-in valve 5 in closed condition.
When guide's oil circuit step pilot reversing valve 8 original position, its pressure hydraulic fluid port P8 communicates with actuator port A8, makes guide's hydraulic fluid port X of tested load control valve 10 in upper pressure condition.
Described guide's two-way plug-in valve 5 bypasses are connected on the oil circuit between working connection oil hydraulic pump 1 and manual directional control valve 9, in order to the step signal of induced pressure to be provided.
8 bypasses of guide's oil circuit step pilot reversing valve are connected on the oil circuit between proportional pressure-reducing valve 7 and the control mouth of tested load control valve 10, in order to the step signal of pilot pressure to be provided.
Working principle when the utility model is tested tested load control valve is as follows:
1) while carrying out one-way conduction characteristic test, working connection oil hydraulic pump 1 is opened, guide's oil circuit oil hydraulic pump 2 cuts out, manually directional control valve 9 is in right position, working connection pilot reversing valve 6, proportional pressure-reducing valve 7, guide's oil circuit pilot reversing valve 8 no electric circuits, proportional pressure control valve 3, pass into certain electric current by data collecting card 16 and power amplifier device 15 to proportional pressure control valve 3 by computer 17, and then control the pressure of the return opening A of tested load control valve 10, induced pressure transmitter 11, return pressure transmitter 12, flowmeter 14 is respectively by the induced pressure of measuring, return pressure and change into electrical signal by the flow of tested load control valve 10 and send data collecting card 16 to and then be recorded in computer 17.
2) while carrying out the test of induced pressure-Flow characteristics, working connection oil hydraulic pump 1 is opened, guide's oil circuit oil hydraulic pump 2 is opened, manually directional control valve 9 is in left position, working connection pilot reversing valve 6, guide's oil circuit pilot reversing valve 8 no electric circuits, thereby pass into certain electric current by data collecting card 16 and power amplifier device 15 to proportional pressure-reducing valve 7 by computer 17 pressure of guide's hydraulic fluid port X of load control valve 10 is adjusted to certain value, pass into certain electric current by data collecting card 16 and power amplifier device 15 to proportional pressure control valve 3 by computer 17, and then the pressure of controlling the load hydraulic fluid port B of tested load control valve 10 changes in the scope of needs, induced pressure transmitter 11, return pressure transmitter 12, pilot pressure transmitter 13, flowmeter 14 is respectively by the induced pressure of measuring, return pressure, pilot pressure and change into electrical signal by the flow of tested load control valve 10 and send data collecting card 16 to and then be recorded in computer 17.
3) while carrying out the test of pilot pressure-Flow characteristics, working connection oil hydraulic pump 1 is opened, guide's oil circuit oil hydraulic pump 2 is opened, manually directional control valve 9 is in left position, working connection pilot reversing valve 6, guide's oil circuit pilot reversing valve 8 no electric circuits, pass into certain electric current by data collecting card 16 and power amplifier device 15 to proportional pressure control valve 3 by computer 17, and then the pressure of controlling the load hydraulic fluid port B of tested load control valve 10 is certain value, thereby pass into certain electric current by data collecting card 16 and power amplifier device 15 to proportional pressure-reducing valve 7 by computer 17 changes the pressure of guide's hydraulic fluid port X of load control valve 10 in the scope of needs, induced pressure transmitter 11, return pressure transmitter 12, pilot pressure transmitter 13, flowmeter 14 is respectively by the induced pressure of measuring, return pressure, pilot pressure and change into electrical signal by the flow of tested load control valve 10 and send data collecting card 16 to and then be recorded in computer 17.
4) while carrying out the test of induced pressure step response, working connection oil hydraulic pump 1 is opened, guide's oil circuit oil hydraulic pump 2 is opened, manually directional control valve 9 is in left position, when starting, working connection pilot reversing valve 6 controlled in obtaining electricity condition by data collecting card 16 and power amplifier device 15 by computer, guide's oil circuit pilot reversing valve 8 no electric circuits, pass into certain electric current by data collecting card 16 and power amplifier device 15 to proportional pressure control valve 3 by computer 17, the set pressure that makes proportional pressure control valve is certain value, passing into certain electric current by data collecting card 16 and power amplifier device 15 to proportional pressure-reducing valve 7 by computer 17, thereby to make the pressure of guide's hydraulic fluid port X of load control valve 10 be certain value, at a time, control the unexpected dead electricity of working connection pilot reversing valve 6 by computer by data collecting card 16 and power amplifier device 15, thereby make the load hydraulic fluid port B of tested load control valve 10 produce the pressure signal of step, induced pressure transmitter 11, return pressure transmitter 12, pilot pressure transmitter 13, flowmeter 14 is respectively by the induced pressure of measuring, return pressure, pilot pressure and change into electrical signal by the flow of tested load control valve 10 and send data collecting card 16 to and then be recorded in computer 17.
5) while carrying out the test of pilot pressure step response, working connection oil hydraulic pump 1 is opened, guide's oil circuit oil hydraulic pump 2 is opened, manually directional control valve 9 is in left position, when starting, guide's oil circuit pilot reversing valve 8 controlled in obtaining electricity condition by data collecting card 16 and power amplifier device 15 by computer, working connection pilot reversing valve 6 no electric circuits, pass into certain electric current by data collecting card 16 and power amplifier device 15 to proportional pressure control valve 3 by computer 17, making the pressure of the load hydraulic fluid port B of tested load control valve 10 is certain value, thereby passing into proportional pressure-reducing valve 7 set pressure that certain electric current makes proportional pressure-reducing valve 7 by data collecting card 16 and power amplifier device 15 by computer 17 is certain value, at a time, control the unexpected dead electricity of guide's oil circuit pilot reversing valve 8 by computer by data collecting card 16 and power amplifier device 15, thereby make guide's hydraulic fluid port X of tested load control valve 10 produce the pressure signal of step, induced pressure transmitter 11, return pressure transmitter 12, pilot pressure transmitter 13, flowmeter 14 is respectively by the induced pressure of measuring, return pressure, pilot pressure and change into electrical signal by the flow of tested load control valve 10 and send data collecting card 16 to and then be recorded in computer 17.
Claims (5)
1. the pilot system of a leading type load control valve, it is characterized in that: comprise working connection oil hydraulic pump (1), guide's oil circuit oil hydraulic pump (2), proportional pressure control valve (3), manually relief valve (4), guide's two-way plug-in valve (5), working connection pilot reversing valve (6), proportional pressure-reducing valve (7), guide's oil circuit pilot reversing valve (8), manually directional control valve (9), tested load control valve (10), induced pressure transmitter (11), return pressure transmitter (12), pilot pressure transmitter (13), flowmeter (14), power amplifier device (15), data collecting card (16) and computer (17),
The oil outlet of working connection oil hydraulic pump (1) is connected with the pressure hydraulic fluid port P9 of manual directional control valve (9), and bypass connects the oil inlet P 3 of proportional pressure control valve (3) and the filler opening A5 of guide's two-way plug-in valve (5), manually the actuator port A9 of directional control valve (9) and the load hydraulic fluid port B of tested load control valve (10) are connected, the return opening A of tested load control valve (10) is connected with the actuator port B9 of manual directional control valve (9), manually the oil return inlet T 9 of directional control valve (9) is connected with the filler opening of flowmeter (14), and the return opening of flowmeter (14) is connected with fuel tank;
The oil outlet of guide's oil circuit oil hydraulic pump (2) is connected with the pressure hydraulic fluid port P7 of proportional pressure-reducing valve (7), and bypass connects the oil inlet P 4 of manual relief valve (4) and the pressure hydraulic fluid port P6 of working connection pilot reversing valve (6), the oil return inlet T 7 of proportional pressure-reducing valve (7) is connected with fuel tank, the actuator port A7 of proportional pressure-reducing valve (7) is connected with guide's hydraulic fluid port X of tested load control valve (10), and the actuator port A8 that bypass connects guide's oil circuit pilot reversing valve (8) is connected, the pressure hydraulic fluid port P8 of guide's oil circuit pilot reversing valve (8) blocks, the oil return inlet T 8 of guide's oil circuit pilot reversing valve (8) is connected with fuel tank, working connection pilot reversing valve (6) oil return inlet T 6 is connected with fuel tank, working connection pilot reversing valve (6) actuator port A6 is connected with the control port X5 of guide's two-way plug-in valve (5), working connection pilot reversing valve (6) actuator port B6 blocks,
Induced pressure transmitter (11) is connected with the load hydraulic fluid port B of tested load control valve (10), return pressure transmitter (12) is connected with the return opening A of tested load control valve (10), and pilot pressure transmitter (13) is connected with guide's hydraulic fluid port X of tested load control valve (10), induced pressure transmitter (11), return pressure transmitter (12), the signal output part of pilot pressure transmitter (13) and flowmeter (14) is all connected with the analog input mouth of data collecting card (16), data collecting card (16) is arranged on the mainboard of computer (17) and carries out communication with computer (17), the digital output end of data collecting card is connected with the input end of power amplifier device (15), the output terminal of power amplifier device (15) respectively with proportional pressure control valve (3), working connection pilot reversing valve (6), proportional pressure-reducing valve (7) is connected with the proportion electro-magnet of guide's oil circuit step pilot reversing valve (8), the digital output DO1 of data collecting card (16) is connected with main step module, and the digital output DO2 of data collecting card (16) is connected with guide's step module.
2. the pilot system of a kind of leading type load control valve according to claim 1, it is characterized in that: described main step module, comprises main step circuit triode (18), main step circuit relay (19), main step circuit diode (20), main step circuit input resistance R1, main step circuit pull-up resistor R2, main step circuit dead resistance R3 and working connection pilot reversing valve electromagnet YA1; the digital output DO1 of data collecting card (16) is connected with one end of main step circuit input resistance R1, the other end of main step circuit input resistance R1 is connected with the base stage of main step circuit triode (18), the collector electrode of main step circuit triode (18) is connected with the input anode of main step circuit relay (19), be connected the emitter of main step circuit triode (18) and power supply, the input anode of main step circuit relay (19) is connected with positive source by main step circuit pull-up resistor R2, be connected the input cathode of main step circuit relay (19) and power supply, the output head anode of main step circuit relay (19) is connected with positive source, the negative pole of output end of main step circuit relay (19) is connected with the negative pole of main step circuit diode (20), the positive pole of main step circuit diode (20) by main step circuit dead resistance R3 and power supply be connected, one end of working connection pilot reversing valve electromagnet YA1 is connected with the negative pole of output end of main step circuit relay (19), be connected the other end of working connection pilot reversing valve electromagnet YA1 and power supply.
3. the pilot system of a kind of leading type load control valve according to claim 1, it is characterized in that: described guide's step module, comprises guide's step circuit triode (21), guide's step circuit relay (22), guide's step circuit diode (23), guide's step circuit input resistance R4, guide's step circuit pull-up resistor R5, guide's step circuit dead resistance R6 and guide's oil circuit pilot reversing valve electromagnet YA2; jump one end of circuit input resistance R4 of the digital output DO2 of data collecting card (16) and guide is connected, the other end of guide's step circuit input resistance R4 is connected with the base stage of guide's step circuit triode (21), the collector electrode of guide's step circuit triode (21) is connected with the input anode of guide's step circuit relay (22), be connected the emitter of guide's step circuit triode (21) and power supply, the input anode of guide's step circuit relay (22) is connected with positive source by guide's step circuit pull-up resistor R5, be connected the input cathode of guide's step circuit relay (22) and power supply, the output head anode of guide's step circuit relay (22) is connected with positive source, the negative pole of output end of guide's step circuit relay (22) is connected with the negative pole of guide's step circuit diode (23), the positive pole of guide's step circuit diode (23) by guide's step circuit dead resistance R6 and power supply be connected, one end of guide's oil circuit pilot reversing valve electromagnet YA2 is connected with the negative pole of output end of guide's step circuit relay (22), be connected the other end of guide's oil circuit pilot reversing valve electromagnet YA2 and power supply.
4. the pilot system of a kind of leading type load control valve according to claim 1, it is characterized in that: when working connection step pilot reversing valve (6) original position, its pressure hydraulic fluid port P6 communicates with actuator port A6, thereby make guide's two-way plug-in valve (5) in closed condition.
5. the pilot system of a kind of leading type load control valve according to claim 1, it is characterized in that: when guide's oil circuit step pilot reversing valve (8) original position, its pressure hydraulic fluid port P8 communicates with actuator port A8, make guide's hydraulic fluid port X of tested load control valve (10) in upper pressure condition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420013829.0U CN203655789U (en) | 2014-01-09 | 2014-01-09 | Testing system of pilot load control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420013829.0U CN203655789U (en) | 2014-01-09 | 2014-01-09 | Testing system of pilot load control valve |
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| Publication Number | Publication Date |
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| CN203655789U true CN203655789U (en) | 2014-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420013829.0U Withdrawn - After Issue CN203655789U (en) | 2014-01-09 | 2014-01-09 | Testing system of pilot load control valve |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103775435A (en) * | 2014-01-09 | 2014-05-07 | 浙江大学 | Testing system of pilot-operated type load control valve |
| CN105605032A (en) * | 2014-10-30 | 2016-05-25 | 北京精密机电控制设备研究所 | Dynamic loading device for dynamic pressure feedback test of servo valve |
| CN112253577A (en) * | 2020-10-30 | 2021-01-22 | 农业农村部南京农业机械化研究所 | Crawler chassis test system and test method |
| CN115617085A (en) * | 2022-12-19 | 2023-01-17 | 星宇电子(宁波)有限公司 | High-pressure gas pressure control valve |
-
2014
- 2014-01-09 CN CN201420013829.0U patent/CN203655789U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103775435A (en) * | 2014-01-09 | 2014-05-07 | 浙江大学 | Testing system of pilot-operated type load control valve |
| CN103775435B (en) * | 2014-01-09 | 2015-11-04 | 浙江大学 | The pilot system of leading type load control valve |
| CN105605032A (en) * | 2014-10-30 | 2016-05-25 | 北京精密机电控制设备研究所 | Dynamic loading device for dynamic pressure feedback test of servo valve |
| CN112253577A (en) * | 2020-10-30 | 2021-01-22 | 农业农村部南京农业机械化研究所 | Crawler chassis test system and test method |
| CN115617085A (en) * | 2022-12-19 | 2023-01-17 | 星宇电子(宁波)有限公司 | High-pressure gas pressure control valve |
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