CN110211478B - Hydraulic test device and test method - Google Patents

Hydraulic test device and test method Download PDF

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Publication number
CN110211478B
CN110211478B CN201910334847.6A CN201910334847A CN110211478B CN 110211478 B CN110211478 B CN 110211478B CN 201910334847 A CN201910334847 A CN 201910334847A CN 110211478 B CN110211478 B CN 110211478B
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China
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switch
valve
relay
stroke
overflow valve
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CN110211478A (en
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安治强
郝俊
张俭
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China General Nuclear Power Corp
CGN Power Co Ltd
China Nuclear Power Operation Co Ltd
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China General Nuclear Power Corp
CGN Power Co Ltd
China Nuclear Power Operation Co Ltd
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B25/00—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes
    • G09B25/02—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes of industrial processes; of machinery
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B9/00—Simulators for teaching or training purposes

Abstract

The invention relates to a hydraulic test device and a test method, comprising the following steps: the hydraulic control system comprises an electric hydraulic pump, a liquid storage tank connected with the electric hydraulic pump, a first electromagnetic valve, a double-acting hydraulic cylinder connected with the first electromagnetic valve, and a first overflow valve, a second overflow valve and a third overflow valve which are arranged between the electric hydraulic pump and the liquid storage tank; the first overflow valve and the second overflow valve are respectively connected with the electric hydraulic pump through a second electromagnetic valve, the first overflow valve and the second overflow valve are connected with the liquid storage tank guide pipe, and the third overflow valve is connected with the electric hydraulic pump and the liquid storage tank; a piston rod of the double-acting hydraulic cylinder is provided with a stroke baffle, and a first stroke switch and a second stroke switch are arranged on two sides of the stroke baffle; and the power circuit is used for controlling the first electromagnetic valve to switch the electric hydraulic pump to be communicated with the first oil cavity or the second oil cavity of the double-acting hydraulic cylinder respectively and controlling the second electromagnetic valve to switch the electric hydraulic pump to be communicated with the first overflow valve or the second overflow valve respectively. The method and the device can simulate partial functions of the on-site hydrostatic test pump set, can simulate common on-site faults, and are low in training cost.

Description

Hydraulic test device and test method
Technical Field
The invention relates to the technical field of nuclear power test devices, in particular to a hydraulic test device and a test method.
Background
In a nuclear power station, a common hydraulic test pump set is emergency equipment of a pressurized water reactor nuclear power station of M310/CPR 1000 and the like, and provides shaft seal water for a primary loop reactor coolant pump under an accident condition. The hydrostatic test pump set is on-line equipment of a nuclear power station, and a test device for training is not available at present. The real water pressure test pump set used on site has the following problems in the teaching and using process:
1. the real hydrostatic test pump package cost of field usage is expensive, if use real hydrostatic test pump package to be used for training teaching aid, training teaching aid expense will be very expensive, and the training cost performance is extremely low, can't implement.
2. The pressure control valve and the direction control valve of the on-site real hydrostatic test pump set are connected with the oil pump and the hydraulic cylinder through the stainless steel header block, the connection relationship of the pressure control valve and the direction control valve cannot be observed outside, and the technical personnel can not master the working principle of the hydraulic test pump set. The directional control valve cannot display the excitation condition of the electromagnetic coil, and technicians cannot visually judge the excitation condition of the electromagnetic valve.
3. The hydrostatic test pump unit is a device shared by two units, the unavailability of the hydrostatic test pump unit can cause that the two running units record a first group I0, the overhaul time does not exceed 6 days, and technicians are required to quickly judge and process faults. In order to better improve the fault handling capacity of technicians, the hydraulic test pump set needs to be subjected to fault simulation reproduction, but the hydraulic test pump set which normally operates on line cannot artificially introduce simulated faults and cannot be subjected to fault simulation due to the requirement of unit availability.
4. Under the accident condition, when the hydraulic test pump unit provides shaft seal water for the primary loop reactor coolant pump, if the outlet pressure of the hydraulic test pump unit does not meet the condition, an operator needs to manually adjust the outlet pressure of the oil pump of the pump unit. However, due to the limitation of the availability of the hydraulic test pump set, an operator cannot use the online hydraulic test pump set to perform oil pump outlet pressure adjustment operation skill training.
Disclosure of Invention
The present invention is directed to a hydraulic test apparatus and a test method, which are used to solve the above-mentioned drawbacks of the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: constructing a hydraulic testing apparatus comprising: the hydraulic system comprises an electric hydraulic pump, a liquid storage tank connected with an inlet guide pipe of the electric hydraulic pump, a first electromagnetic valve connected with an outlet guide pipe of the electric hydraulic pump, a double-acting hydraulic cylinder connected with a guide pipe of the first electromagnetic valve, and a first overflow valve, a second overflow valve and a third overflow valve which are arranged between an outlet of the electric hydraulic pump and the liquid storage tank;
the inlet of the first overflow valve and the inlet of the second overflow valve are respectively connected with the outlet guide pipe of the electric hydraulic pump through a second electromagnetic valve, the outlet of the first overflow valve and the outlet of the second overflow valve are connected with the liquid storage tank guide pipe, the inlet of the third overflow valve is connected with the outlet guide pipe of the electric hydraulic pump, and the outlet of the third overflow valve is connected with the liquid storage tank guide pipe;
a stroke baffle is arranged at the top of the exposed end of a piston rod of the double-acting hydraulic cylinder, and a first stroke switch and a second stroke switch which can be driven by the stroke baffle are arranged on two sides of the stroke baffle; and
a power supply circuit connected to the electric hydraulic pump, the first solenoid valve, the second solenoid valve, and the first and second travel switches;
the power supply circuit is used for controlling the first electromagnetic valve to switch the outlet of the electric hydraulic pump to be communicated with a first oil cavity or a second oil cavity of the double-acting hydraulic cylinder respectively;
the power circuit is also used for controlling the second electromagnetic valve to switch the outlet of the electric hydraulic pump to be respectively communicated with the first overflow valve or the second overflow valve.
Preferably, the method further comprises the following steps:
the pressure gauge is connected with the electric hydraulic pump and the second electromagnetic valve; and/or
And a filter connecting the electric hydraulic pump and the liquid storage tank.
Preferably, the conduit connection comprises connection by a transparent hose;
and the shells of the double-acting hydraulic cylinder, the first electromagnetic valve, the second electromagnetic valve, the first overflow valve, the second overflow valve and the third overflow valve are all made of transparent materials.
Preferably, the power supply circuit includes a first switch, a dc converter, and a first power supply circuit and a second power supply circuit connected to the dc converter;
the first power supply circuit is used for controlling the first electromagnetic valve to switch the outlet of the electric hydraulic pump to be communicated with a first oil chamber or a second oil chamber of the double-acting hydraulic cylinder respectively;
the second power supply circuit is used for controlling the second electromagnetic valve to switch the outlet of the electric hydraulic pump to be respectively communicated with the first overflow valve or the second overflow valve.
Preferably, the power circuit further comprises a second switch and a frequency converter, and an external power source is connected with the electric hydraulic pump through the first switch, the second switch and the frequency converter.
Preferably, the first power supply circuit includes a first relay;
a coil of the first relay is connected with the direct current converter through a third switch and the first travel switch, and the first travel switch is connected with a fourth switch in parallel;
a coil of the first relay is connected with a first pair of contacts of the first relay, a fifth switch and the second travel switch in series and then connected with the direct current converter, and the second travel switch is connected with a sixth switch in parallel;
a first electromagnetic coil of the first electromagnetic valve is connected with the direct current converter after being connected in series with a seventh switch through a second pair of contacts of the first relay;
a second electromagnetic coil of the first electromagnetic valve is connected with the direct-current converter after being connected in series with the seventh switch through a third pair of contacts of the first relay; and/or
The second power supply circuit includes a second relay and a third relay;
a coil of the second relay is connected with the direct current converter through an eighth switch and a tenth switch; the eighth switch is connected in parallel with the first pair of contacts of the second relay;
a coil of the third relay is connected with the direct current converter through the second pair of contacts of the second relay, the ninth switch and the tenth switch; the ninth switch is connected in parallel with the first pair of contacts of the third relay; the coil of the third relay is connected with the tenth switch through an eleventh switch;
the first electromagnetic coil of the second electromagnetic valve is connected with the direct-current converter through the third pair of contacts of the third relay and the third pair of contacts of the second relay;
a second electromagnetic coil of the second electromagnetic valve is connected with the direct-current converter through a fourth pair of contacts of the third relay and a fourth pair of contacts of the second relay; .
Preferably, the first power supply circuit further includes: the first indicator light and/or the second indicator light;
a first electromagnetic coil of the first electromagnetic valve is connected with the first indicator lamp in parallel;
the second electromagnetic coil of the first electromagnetic valve is connected with the second indicator light in parallel;
and/or
The second power supply further comprises one or more of a third indicator light, a fourth indicator light, a fifth indicator light, a sixth indicator light, and a seventh indicator light;
the first electromagnetic coil of the second electromagnetic valve is connected with the third indicator lamp in parallel;
a second electromagnetic coil of the second electromagnetic valve is connected with the fourth indicator lamp in parallel;
the fifth indicator light is connected with the direct current converter through a fifth pair of contacts of the second relay;
the sixth indicator light is connected with the direct current converter through a fifth pair of contacts of the third relay;
the seventh indicator light is connected to the dc converter via a sixth pair of contacts of the third relay and a sixth pair of contacts of the second relay.
Preferably, the first switch and the second switch are load switches,
the third switch, the fourth switch, the fifth switch, the sixth switch, the seventh switch and the eleventh switch are key switches;
the eighth switch, the ninth switch and the tenth switch are push-button switches.
The present invention also provides a hydraulic test method using any one of the above hydraulic test apparatuses, including: a working mode in which the first electromagnetic valve, the first travel switch and the second travel switch are normally operated when the power supply circuit is started and the electric hydraulic pump is operated, and
the power supply circuit receives a first trigger signal and simulates a first abnormal mode of the first travel switch fault;
the power supply circuit receives a second trigger signal and simulates a second abnormal mode of the second travel switch fault;
the power supply circuit receives a third trigger signal and simulates a third abnormal mode of the pressure fault of the outlet of the electric hydraulic pump;
the working mode comprises the following steps:
s1, the power circuit triggers the first electromagnetic valve to switch the outlet of the electric hydraulic pump to be communicated with a second oil cavity of the double-acting hydraulic cylinder, and the piston of the double-acting hydraulic cylinder starts to move along the first direction;
s2, moving the double-acting hydraulic cylinder piston to a stroke baffle on the top of the outer end of the double-acting hydraulic cylinder piston rod to contact the first stroke switch;
s3, the first travel switch is driven, the power circuit triggers the first electromagnetic valve to switch the outlet of the electric hydraulic pump to be communicated with the first oil chamber of the double-acting hydraulic cylinder, the piston of the double-acting hydraulic cylinder starts to move along the second direction,
s4, moving the double-acting hydraulic cylinder piston to the position that the stroke baffle contacts the second stroke switch;
s5, the second stroke switch is driven, and the step S1 is executed again.
Preferably, the power supply circuit receives a first trigger signal, and the first abnormal mode simulating the failure of the first travel switch includes:
triggering a third switch to be disconnected, and disconnecting the first travel switch from a coil of a first relay so as to simulate a fault that the first travel switch cannot be closed; or
And triggering a fourth switch to be closed, and short-circuiting the first travel switch to simulate the first travel switch failure to open.
Preferably, the power supply circuit receives a second trigger signal, and the second abnormal mode simulating the failure of the second travel switch includes:
triggering a fifth switch to be disconnected, and disconnecting the second travel switch from a coil of the first relay so as to simulate a fault that the second travel switch cannot be closed; or
And triggering a sixth switch to close, and short-circuiting the second travel switch to simulate the second travel switch failure to open.
Preferably, the power circuit receives a third trigger signal, and a third abnormal mode simulating the outlet pressure failure of the electric hydraulic pump includes:
and triggering a seventh switch to be disconnected, and switching the outlet of the electric hydraulic pump to be communicated with the liquid storage tank by the first electromagnetic valve.
Preferably, the hydraulic test method further comprises:
when a first coil of the first electromagnetic valve is electrified, a first indicator lamp is lightened; and/or
When the second coil of the first electromagnetic valve is electrified, the second indicator lamp is lightened.
Preferably, the operation modes include:
the power supply circuit receives a fourth trigger signal and drives the second electromagnetic valve to switch a first working mode of conducting the outlet of the electric hydraulic pump and the first overflow valve;
the power supply circuit receives a fifth trigger signal and drives the second electromagnetic valve to switch a second working mode of conducting the outlet of the electric hydraulic pump and a second overflow valve; and
and the power supply circuit receives a sixth trigger signal and drives the second electromagnetic valve to be switched off so as to ensure that the outlet of the electric hydraulic pump is not communicated with the first overflow valve and the second overflow valve.
Preferably, the first and second electrodes are formed of a metal,
the power circuit receiving the fourth trigger signal comprises triggering a ninth switch;
the power circuit receives a fifth trigger signal and triggers the eighth switch;
the power circuit receiving the sixth trigger signal includes triggering a tenth switch.
Preferably, the test method further comprises a fourth anomaly pattern comprising:
the power supply circuit receives a seventh trigger signal to turn off a second electromagnetic valve, and the second electromagnetic valve switches the outlet of the electric hydraulic pump to be not communicated with the first overflow valve and the second overflow valve;
preferably, the power supply circuit receiving the seventh trigger signal includes triggering an eleventh switch.
Preferably, the hydraulic test method further comprises:
illuminating a sixth indicator light in the first operating mode; and/or
In the second working mode, a fifth indicator light is lightened; and/or
In the fourth abnormal mode, a seventh indicator lamp is lightened; and/or
When the first electromagnetic coil of the second electromagnetic valve is electrified, a third indicator lamp is lightened; and/or
And when the second electromagnetic coil of the second electromagnetic valve is electrified, the fourth indicator lamp is lightened.
The hydraulic test device and the test method have the following beneficial effects that: the simulation system can simulate partial functions of a field hydraulic test pump set, can simulate common field faults, is used for training, and is low in training cost.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic structural diagram of a hydraulic testing apparatus according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of an embodiment of a hydraulic testing apparatus according to the present invention.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
As shown in fig. 1, a first embodiment of a hydraulic test apparatus according to the present invention includes: the hydraulic control system comprises an electric hydraulic pump 130, a liquid storage tank 110 connected with an inlet guide pipe of the electric hydraulic pump 130, a first solenoid valve DT1 connected with an outlet guide pipe of the electric hydraulic pump 130, a double-acting hydraulic cylinder 140 connected with a guide pipe of a first solenoid valve DT1, and a first overflow valve PV1, a second overflow valve PV2 and a third overflow valve PV3 which are arranged between the outlet of the electric hydraulic pump 130 and the liquid storage tank 110; inlets of the first overflow valve PV1 and the second overflow valve PV2 are respectively connected with an outlet conduit of the electric hydraulic pump 130 through a second electromagnetic valve DT2, outlets of the first overflow valve PV1 and the second overflow valve PV2 are connected with an outlet conduit of the liquid storage tank 110, an inlet of the third overflow valve PV3 is connected with an outlet conduit of the electric hydraulic pump 130, and an outlet of the third overflow valve PV3 is connected with a conduit of the liquid storage tank 110; a stroke baffle 150 is arranged at the top of the exposed end of a piston rod 143 of the double-acting hydraulic cylinder 140, and a first stroke switch SQ1 and a second stroke switch SQ2 which can be driven by the stroke baffle 150 are arranged at two sides of the stroke baffle 150; and a power supply circuit connected to the electric hydraulic pump 130, the first solenoid valve DT1, the second solenoid valve DT2, the first stroke switch SQ1, and the second stroke switch SQ 2; the power circuit is used for controlling the first solenoid valve DT1 to switch the outlet of the electric hydraulic pump 130 to be communicated with the first oil chamber 141 or the second oil chamber 142 of the double-acting hydraulic cylinder 140 respectively; the power circuit is used for controlling the second solenoid valve DT2 to switch the outlet of the electric hydraulic pump 130 to be communicated with the first overflow valve PV1 or the second overflow valve PV2 respectively.
Specifically, the electric hydraulic pump 130 may be an oil pump, and the specific type thereof may be one of a gear pump, a screw pump, a vane pump, a plunger pump and other types of displacement pumps in a displacement pump, and the driving mode thereof is a variable frequency motor driving, and the motor driving voltage is ac 220V. Hereinafter, the operation of the electric hydraulic pump 130 is exemplified by an oil pump, and the tank 110 may be a corresponding oil tank, and the oil pump provides power hydraulic oil to the hydraulic circuit, and changes the rotation speed of the oil pump by adjusting the frequency of the motor power supply, thereby changing the flow rate of the oil pump. The inlet of the oil pump is connected to the oil tank, namely the liquid storage tank 110, and the outlet is connected with the P oil ports of the first solenoid valve DT1 and the second solenoid valve DT2 and the inlet of the third overflow valve PV 3. The P port of the first solenoid valve DT1 is connected to the oil pump outlet, the T port is connected to the oil tank, the a port is connected to the first oil chamber 141 of the double-acting hydraulic cylinder 140, and the B port is connected to the second oil chamber 142 of the double-acting hydraulic cylinder 140. When the first solenoid valve DT1 is not energized, the P port, the T port, the a port, and the B port are communicated, and the double-acting hydraulic cylinder 140 does not operate. When the first electromagnetic coil EL01 of the first electromagnetic valve DT1 loses power and the second electromagnetic coil EL02 gets power, the P oil port is communicated with the B oil port, the T oil port is communicated with the a oil port, the oil pump supplies oil to the second oil chamber 142 of the double-acting hydraulic cylinder 140, the first oil chamber 141 of the double-acting hydraulic cylinder 140 is communicated with the oil tank, and the piston 144 of the hydraulic cylinder runs in the first direction. When the stroke baffle 150 of the hydraulic cylinder touches the first stroke switch SQ1, the first electromagnetic coil EL01 of the first electromagnetic valve DT1 is powered on, and the second electromagnetic coil EL02 is powered off, the oil port P is communicated with the oil port a, the oil port T is communicated with the oil port B, the oil pump supplies oil to the first oil chamber 141 of the double-acting hydraulic cylinder 140, the second oil chamber 142 of the double-acting hydraulic cylinder 140 is communicated with the oil tank, and the piston 144 of the hydraulic cylinder runs in the second direction. When the stroke stop 150 of the hydraulic cylinder touches the second stroke switch SQ2, the solenoid EL01 of the solenoid valve DT1 is de-energized again and the solenoid EL02 is energized again. The first solenoid valve DT1 is thus repeatedly energized to control the reciprocating operation of the piston 144 of the double-acting hydraulic cylinder 140. It will be appreciated that the first solenoid valve DT1 employs an "H" type neutral position mechanism. The first stroke switch SQ1 and the second stroke switch SQ2 can be of a mechanical swing arm type, wherein the first stroke switch SQ1 is a normally open stroke switch, and the second stroke switch SQ2 is a normally closed stroke switch.
The first overflow valve PV1, the second overflow valve PV2 and the third overflow valve PV3 are used for controlling the pressure of an oil pump outlet, the set pressures of the overflow valves PV1, PV2 and PV3 are P1, P2 and P3 respectively, P3 is greater than P1, and P3 is greater than P2. The inlet of the third overflow valve PV3 is connected with the outlet of the oil pump, and the outlet of the third overflow valve PV3 is connected with the oil tank. The inlet of the first relief valve PV1 is connected to the port a of the second solenoid valve DT2, and the outlet of the first relief valve PV1 is connected to the tank. The inlet of the second relief valve PV2 is connected to the B port of the second solenoid valve DT2, and the outlet of the second relief valve PV2 is connected to the tank. The P port of the second solenoid valve DT2 is connected to the oil pump outlet, and the T port of the second solenoid valve DT2 is connected to the oil tank. When the second solenoid valve DT2 is not excited, only the third relief valve PV3 is connected to the oil pump outlet, and the outlet pressure of the oil pump is controlled by PV 3. When electromagnetic coil EL03 of second electromagnetic valve DT2 is powered on and electromagnetic coil EL04 is powered off, second relief valve PV2 and third relief valve PV3 are both connected with the outlet of the oil pump, the outlet pressure of the oil pump is controlled by second relief valve PV2 and third relief valve PV3 together, but the outlet pressure of the oil pump is controlled by second relief valve PV2 because P3 is greater than P2. When electromagnetic coil EL03 of second electromagnetic valve DT2 is de-energized and electromagnetic coil EL04 is energized, first relief valve PV1 and third relief valve PV3 are both connected with the outlet of the oil pump, the outlet pressure of the oil pump is controlled by first relief valve PV1 and third relief valve PV3 together, but the outlet pressure of the oil pump is controlled by first relief valve PV1 because P3 is greater than P1. It will be appreciated that the second solenoid valve DT2 employs an "O" type neutral position mechanism.
In the test device, an operator can operate and set the pressure values of the first relief valve PV1, the second relief valve PV2 and the third relief valve PV3 to simulate the site pressure setting. If the pressure setting of the third relief valve PV3 is set to be smaller than the pressure setting of the first relief valve PV1 or the second relief valve PV2, a site pressure setting error failure can be simulated.
Optionally, the hydraulic test apparatus of the present invention further includes: a pressure gauge 160 connecting the electric hydraulic pump 130 and the second solenoid valve; and/or a filter 120 connecting the electric hydraulic pump 130 with the tank 110. Specifically, the pressure gauge 160 is connected to the oil pump outlet to display the oil pump outlet pressure. The inlet of the oil pump can be connected to the oil tank through a filter 120 to filter impurities.
Optionally, the conduit connection comprises connection by a transparent hose; the shell of the double-acting hydraulic cylinder, the shell of the first electromagnetic valve, the shell of the second electromagnetic valve, the shell of the first overflow valve, the shell of the second overflow valve and the shell of the third overflow valve are all made of transparent materials. Specifically, the pipe adopts transparent hose, and the casing of two effect pneumatic cylinder, first solenoid valve, second solenoid valve, first overflow valve, second overflow valve and third overflow valve all can be transparent materials such as organic glass, and first solenoid valve DT1 and second solenoid valve DT2 both ends can also be equipped with the pilot lamp that has the demonstration solenoid excitation condition.
As shown in fig. 2, the power supply circuit includes a first switch QS1, a dc converter 210, and a first power supply circuit 220 and a second power supply circuit 230 connected to the dc converter 210; the first power circuit 220 is used for controlling the first solenoid valve DT1 to switch the outlet of the electric hydraulic pump 130 to be communicated with the first oil chamber 141 or the second oil chamber 142 of the double-acting hydraulic cylinder 140 respectively; the second power circuit 230 is used for controlling the second solenoid valve DT2 to switch the outlet of the electric hydraulic pump 130 to be communicated with the first overflow valve PV1 or the second overflow valve PV2 respectively. Specifically, the dc converter 210 converts 220V ac power to 24V dc power. The 24V dc power supplies power to the device through the first power circuit 220 or the second power circuit 230. The first electromagnetic valve DT1 is controlled by the first power circuit 220 to switch the outlet of the electric hydraulic pump 130 to be communicated with the first oil chamber 141 or the second oil chamber 142 of the double-acting hydraulic cylinder 140 respectively, and the second electromagnetic valve DT2 is controlled by the second power circuit 230 to switch the outlet of the electric hydraulic pump 130 to be communicated with the first overflow valve PV1 or the second overflow valve PV2 respectively.
Optionally, the power circuit further includes a second switch QS2 and a frequency converter 240, and the external power source is connected to the electric hydraulic pump 130 through the first switch QS1, the second switch QS2 and the frequency converter 240. It is understood that the power circuit is composed of a motor circuit of the electric hydraulic pump 130, the inverter 240, the dc converter 210, a first switch QS1, a second switch QS2, a fuse FU1, and the like. The power supply circuit is externally connected with an alternating current 220V power supply, a first switch QS1 is connected with the external power supply and a fuse FU1, and the opening and closing of the first switch QS1 controls the power supply of the whole power supply circuit. Fuse FU1 limits current in line L1 to prevent the load connected to line L1 from exceeding the load. A second switch QS2 connects lead L1 and the inverter 240, which mainly supplies power to the motor of the electric hydraulic pump 130, and the inverter 240 is used to change the rotation speed of the motor of the electric hydraulic pump 130 to adjust the flow rate of the electric hydraulic pump 130. The dc converter 210 is connected to an external power source through a fuse FU1 and a first switch QS1, and provides a dc power source for a downstream circuit.
Optionally, the first power supply circuit 220 includes a first relay;
a coil KA1a of the first relay is connected to the dc converter 210 via a third switch Q1 and a first stroke switch SQ1, and the first stroke switch SQ1 is connected in parallel to a fourth switch Q2; a coil KA1a of the first relay is connected in series with a first pair of contacts KA1b, a fifth switch Q3 and a second stroke switch SQ2 of the first relay and then connected with the dc converter 210, and the second stroke switch SQ2 is connected in parallel with a sixth switch Q4; the first electromagnetic coil EL01 of the first electromagnetic valve DT1 is connected in series with the dc converter 210 through the second pair of contacts KA1c of the first relay and the seventh switch Q5, and the first electromagnetic coil EL01 of the first electromagnetic valve DT1 is connected in parallel with the first indicator lamp HL 1; the second electromagnetic coil EL02 of the first solenoid valve DT1 is connected in series with the dc converter 210 via the third pair of contacts KA1d of the first relay and the seventh switch Q5, and the second electromagnetic coil EL02 of the first solenoid valve DT1 is connected in parallel with the second indicator lamp HL 2; and/or
The second power supply circuit 230 includes a second relay and a third relay;
the coil KA2a of the second relay is connected to the dc converter 210 via an eighth switch SB1 and a tenth switch SB 3; the eighth switch SB1 is connected in parallel with the first pair of contacts KA2b of the second relay;
the coil KA3a of the third relay is connected to the dc converter 210 via the second pair of contacts KA2c, the ninth switch SB2 and the tenth switch SB3 of the second relay; the ninth switch SB2 is connected in parallel with the first pair of contacts KA3b of the third relay; a coil KA3a of the third relay is connected to a tenth switch SB3 via an eleventh switch Q6;
the first electromagnetic coil EL03 of the second solenoid valve DT2 is connected to the dc converter 210 via the third pair of contacts KA3d of the third relay and the third pair of contacts KA2d of the second relay, and the first electromagnetic coil EL03 of the second solenoid valve DT2 is connected in parallel to the third indicator lamp HL 3;
the second electromagnetic coil EL04 of the second solenoid valve DT2 is connected to the dc converter 210 via the fourth pair of contacts KA3e of the third relay and the fourth pair of contacts KA2e of the second relay, and the second electromagnetic coil EL04 of the second solenoid valve DT2 is connected in parallel to a fourth indicator lamp HL 4.
Specifically, the first power supply circuit 220 includes a first relay, a third switch Q1, a fourth switch Q2, a fifth switch Q3, a sixth switch Q4, a seventh switch Q5, a first stroke switch SQ1, a second stroke switch SQ2, a first electromagnetic coil EL01 and a second electromagnetic coil EL02 of the first solenoid valve DT1, a first indicator lamp HL1, and a second indicator lamp HL 2. The first travel switch SQ1 is a normally open switch, the second travel switch SQ2 is a normally closed switch, the third switch Q1 is a normally closed switch, the fourth switch Q2 is a normally open switch, the fifth switch Q3 is a normally closed switch, the sixth switch Q4 is a normally open switch, the seventh switch Q5 is a normally closed switch, the coil KA1a of the first relay is connected in series with the dc converter 210 through the third switch Q1 and the first travel switch SQ1, the coil KA1a of the first relay is connected in series with the dc converter 210 through the first pair of contacts KA1b of the first relay, the fifth switch Q3 and the second travel switch SQ2, and the first electromagnetic coil EL01 of the first electromagnetic valve DT1 is connected with the normally open contact KA1c of the first relay. The second electromagnetic coil EL02 of the first solenoid valve DT1 is connected to the normally closed contact KA1d of the first relay. When the first switch QS1 is closed, the power supply circuit starts supplying power, and if the first stroke switch SQ1 is not closed, the coil KA1a of the first relay is de-energized, the normally open contact KA1c of the first relay is in an open state, the normally closed contact KA1d of the first relay is in a closed state, the first electromagnetic coil EL01 of the first electromagnetic valve DT1 is de-energized, and the second electromagnetic coil EL02 is energized. When the second switch QS2 is closed, the rotation speed of the oil pump is adjusted, the double-acting hydraulic cylinder 140 is driven after the outlet pressure of the oil pump reaches a certain value, and the piston 144 of the double-acting hydraulic cylinder 140 moves in the first direction. When the stroke damper 150 of the double-acting hydraulic cylinder 140 actuates the first stroke switch SQ1, the first switch SQ1 is closed, the coil KA1a of the first relay is energized, the normally open contacts KA1b and KA1c of the first relay are closed, the normally closed contact KA1d is opened, the first electromagnetic coil EL01 of the first electromagnetic valve DT1 is energized, the second electromagnetic coil EL02 is de-energized, and the piston 144 of the double-acting hydraulic cylinder 140 moves in the second direction. When the stroke plate 150 of the double-acting hydraulic cylinder 140 leaves the first stroke switch SQ1, the coil KA1a of the first relay is continuously energized through the self-holding circuit composed of the second stroke switch SQ2, the fifth switch Q3, and the normally open contact KA1b of the first relay, so that the excitation state of the first solenoid valve DT1 is kept unchanged, and the piston 144 of the double-acting hydraulic cylinder 140 continues to move in the second direction. When the stroke damper 150 of the double-acting hydraulic cylinder 140 actuates the second stroke switch SQ2, the second stroke switch SQ2 is turned off, the self-holding circuit of the first relay is turned off, the coil KA1a of the first relay is de-energized, the normally open contact KA1c of the first relay is opened, the normally closed contact KA1d is closed, the first electromagnetic coil EL01 of the first electromagnetic valve DT1 is de-energized, the second electromagnetic coil EL02 is energized, and the piston 144 of the double-acting hydraulic cylinder 140 moves in the first direction. When the stroke stop 150 of the double-acting hydraulic cylinder 140 leaves the second stroke switch SQ2, the energization state of the first solenoid valve DT1 is maintained due to the loss of power to the coil KA1a of the first relay, and the piston 144 of the double-acting hydraulic cylinder 140 continues to move in the first direction. When the stroke stop 150 of the double-acting hydraulic cylinder 140 actuates the first stroke switch SQ1, the coil KA1a of the first relay is energized again, the first electromagnetic coil EL01 of the first solenoid valve DT1 is energized, the second electromagnetic coil EL02 is de-energized, and the piston 144 of the double-acting hydraulic cylinder 140 moves in the second direction. The piston 144 of the double acting hydraulic cylinder 140 thus reciprocates. It is understood that, during such reciprocating operation of the piston 144 of the double-acting hydraulic cylinder 140, the power-on or power-off state of the first solenoid EL01 and the second solenoid EL02 of the first solenoid valve DT1 may be indicated by the first indicator lamp HL1 or the second indicator lamp HL2, and the normal test process of the hydraulic apparatus may be confirmed by the state where the first indicator lamp HL1 and the second indicator lamp HL2 are alternately lighted. Wherein the first indicator lamp HL1 or the second indicator lamp HL2 is optional.
The second power supply circuit 230 includes a second relay, a third relay, an eighth switch SB1, a ninth switch SB2, a tenth switch SB3, an eleventh switch Q6, and the first electromagnetic coil EL03 and the second electromagnetic coil EL04, the third indicator lamp HL3, the fourth indicator lamp HL4 of the second electromagnetic valve DT2, the eighth switch SB1 is a normally open switch, the ninth switch SB2 is a normally open switch, the tenth switch SB3 is a normally closed switch, the eleventh switch Q6 is a normally open switch, the coil KA2a of the second relay is connected in series with the eighth switch SB1 and the tenth switch SB3 to the dc converter 210, the coil KA3a of the third relay is connected in series with the normally closed contact KA2c of the second relay, the ninth switch SB2 and the tenth switch SB3 to the dc converter 210, meanwhile, the coil KA3a of the third relay is connected with the tenth switch SB3 through the eleventh switch Q6, and the first electromagnetic coil EL03 of the second electromagnetic valve DT2 is connected with the dc converter 210 through the normally closed contact KA3d of the third relay and the normally open contact KA2d of the second relay; the second electromagnetic coil EL04 of the second solenoid valve DT2 is connected to the dc converter 210 via the normally open contact KA3e of the third relay and the normally closed contact KA2e of the second relay. It is understood that the power-on or power-off state of the first and second electromagnetic coils EL03 and EL04 of the second solenoid valve DT2 may be indicated by lighting a third indicator lamp HL3 indicating a state where the second relief valve PV2 is connected to the oil pump outlet or lighting a fourth indicator lamp HL4 indicating a state where the first relief valve PV1 is connected to the oil pump outlet, wherein the third indicator lamp HL3 or the fourth indicator lamp HL4 is optional.
Optionally, the second power supply circuit further comprises one or more of a fifth indicator lamp HL5, a sixth indicator lamp HL6 and a seventh indicator lamp HL 7; the fifth indicator lamp HL5 is connected with the DC converter 210 through a fifth pair of contacts KA2f of the second relay; the sixth indicator lamp HL6 is connected with the DC converter 210 through the fifth pair of contacts KA3f of the third relay; the seventh indicator lamp HL7 is connected to the dc converter 210 via the sixth pair of contacts KA3g of the third relay and the sixth pair of contacts KA2g of the second relay. Specifically, the fifth indicator lamp HL5 is connected to the dc converter 210 through the normally open contact KA2f of the second relay. The sixth indicator lamp HL6 is connected to the dc converter 210 through the normally open contact KA3f of the third relay. The seventh indicator lamp HL7 is connected to the dc converter 210 sequentially via the normally open contact KA3g of the third relay and the normally open contact KA2g of the second relay. The fifth, sixth, and seventh indicator lamps HL5, HL6, and HL7 are turned on or off according to the energization of the coil KA2a of the second relay and the coil KA3a of the third relay.
Optionally, the first switch QS1 and the second switch QS2 are load switches, and the third switch Q1, the fourth switch Q2, the fifth switch Q3, the sixth switch Q4, the seventh switch Q5 and the eleventh switch Q6 are key switches; the eighth switch SB1, the ninth switch SB2, and the tenth switch SB3 are push-button switches. The selection of the switch type is performed according to the circuit load requirement and the use convenience, and is not limited to the switch type selection.
In addition, the hydraulic test method of the present invention includes: when the power circuit is started and the electric hydraulic pump 130 works, the first electromagnetic valve DT1, the first stroke switch SQ1 and the second stroke switch SQ2 work normally, and the power circuit receives a first trigger signal and simulates a first abnormal mode of the first stroke switch SQ1 failure; the power supply circuit receives a second trigger signal and simulates a second abnormal mode of the fault of a second stroke switch SQ 2; the power supply circuit receives a third trigger signal and simulates a third abnormal mode of pressure failure at the outlet of the electric hydraulic pump 130;
the working mode comprises the following steps:
s1, the power circuit triggers a first solenoid valve DT1 to switch the outlet of the electric hydraulic pump 130 to be communicated with the second oil chamber 142 of the double-acting hydraulic cylinder 140, and the piston 144 of the double-acting hydraulic cylinder starts to move along the first direction;
s2, the piston 144 of the double-acting hydraulic cylinder moves until the stroke baffle 150 at the top of the outer end of the piston rod 143 of the double-acting hydraulic cylinder contacts a first stroke switch SQ 1;
s3, the first stroke switch SQ1 is driven, the power circuit triggers the first solenoid valve DT1 to switch the outlet of the electric hydraulic pump 130 to be communicated with the first oil chamber 141 of the double-acting hydraulic cylinder, and the piston 144 of the double-acting hydraulic cylinder starts to move along the second direction;
s4, the piston 144 of the double acting hydraulic cylinder moves to the stroke stop 150 to contact the second stroke switch SQ 2;
s5, second stroke switch SQ2 is driven, and the process returns to step S1.
Specifically, during normal operation, when the power supply circuit is started and the electric hydraulic pump 130 operates, the first solenoid valve DT1, the first stroke switch SQ1 and the second stroke switch SQ2 all operate normally, and the operation flow is as follows, wherein the inlet of the oil pump is connected to the oil tank, and the outlet of the oil pump is connected to the P oil ports of the first solenoid valve DT1 and the second solenoid valve DT2 and the inlet of the third overflow valve PV 3. The P port of the first solenoid valve DT1 is connected to the oil pump outlet, the T port is connected to the oil tank, the a port is connected to the first oil chamber 141 of the double-acting hydraulic cylinder 140, and the B port is connected to the second oil chamber 142 of the double-acting hydraulic cylinder 140. When the first solenoid valve DT1 is not energized, the P port, the T port, the a port, and the B port are communicated, and the double-acting hydraulic cylinder 140 does not operate. When the power circuit controls the electromagnetic coil EL01 of the first electromagnetic valve DT1 to lose power and the electromagnetic coil EL02 to be powered on, the oil port P is communicated with the oil port B, the oil port T is communicated with the oil port A, the oil pump supplies oil to the second oil chamber 142 of the double-acting hydraulic cylinder 140, the first oil chamber 141 of the double-acting hydraulic cylinder 140 is communicated with the oil tank, and the piston 144 of the hydraulic cylinder moves towards the first direction. When the stroke baffle 150 of the hydraulic cylinder touches the first stroke switch SQ1, the first electromagnetic coil EL01 of the first electromagnetic valve DT1 is powered on, the second electromagnetic coil EL02 is powered off, the P oil port is communicated with the a oil port, the T oil port is communicated with the B oil port, the oil pump supplies oil to the first oil chamber 141 of the double-acting hydraulic cylinder 140, the second oil chamber 142 of the double-acting hydraulic cylinder 140 is communicated with the oil tank, and the piston 144 of the hydraulic cylinder moves in the second direction. When the stroke stop 150 of the hydraulic cylinder touches the second stroke switch SQ2, the first electromagnetic coil EL01 of the first solenoid valve DT1 is de-energized again, and the second electromagnetic coil EL02 is energized again. The first solenoid valve DT1 is thus repeatedly energized to control the reciprocating operation of the piston 144 of the double-acting hydraulic cylinder 140. At this time, the first abnormality mode, the second abnormality mode, and the third abnormality mode in the case where abnormality occurs in the first stroke switch SQ1, the second stroke switch SQ2, and the electric hydraulic pump 130 can be simulated by triggering the power supply circuit.
Optionally, on the basis that the power circuit receives the first trigger signal, the first abnormal mode simulating the malfunction of the first stroke switch SQ1 includes: triggering the third switch Q1, and opening the first stroke switch SQ1 to simulate the failure of the first stroke switch SQ1 to close the fault; or trigger the fourth switch Q2 to short the first stroke switch SQ1 to simulate the failure of the first stroke switch SQ1 to open the fault. Specifically, when the first stroke switch SQ1 fails to close, the coil KA1a of the first relay cannot be connected to the dc converter 210 through SQ 1. After the third switch Q1 is triggered and the third switch Q1 is turned off, the coil KA1a of the first relay is disconnected from the dc converter 210 through SQ1, and the power circuit of the first relay is equivalent to that the first stroke switch SQ1 fails to close, so as to simulate that the first stroke switch SQ1 fails to close a fault test. When the first stroke switch SQ1 fails to open after being closed, the coil KA1a of the first relay is always powered. The fourth switch Q2 is triggered to close the Q2, so that two ends of the first stroke switch SQ1 are directly connected in a short circuit mode, when the fourth switch Q2 is closed, a power circuit of the fourth switch Q2 is equivalent to that the first stroke switch SQ1 fails to break when a fault occurs, and therefore a fault test that the first stroke switch SQ1 cannot break after being closed is simulated.
Optionally, on the basis that the power circuit receives a second trigger signal, the second abnormal mode simulating a failure of the second stroke switch SQ2 includes: triggering the fifth switch Q3 to open the second stroke switch SQ2 to simulate the failure of the second stroke switch SQ2 to close the fault; or trigger the sixth switch Q4 to short the second stroke switch SQ2 to simulate the failure of the second stroke switch SQ2 to open the fault. Specifically, when the second stroke switch SQ2 is opened, the fault cannot be closed, and the self-holding circuit of the first relay cannot be formed. After the fifth switch Q3 is turned off by triggering the fifth switch Q3, the coil KA1a of the first relay is turned off to be connected with the dc converter 210 through the first pair of contacts KA1b and SQ2 of the first relay, and the power circuit of the dc converter is equivalent to the second stroke switch SQ2, which fails to close, so as to simulate the failure test that the second stroke switch SQ2 cannot close after being turned off. When the second stroke switch SQ2 has an open failure, the coil KA1a of the first relay is electrified and then is always electrified. The sixth switch Q4 is triggered to close the sixth switch Q4, so that two ends of the second stroke switch SQ2 are directly connected in a short circuit mode, the effect of the second stroke switch SQ 3526 is consistent with the effect that the second stroke switch SQ2 fails to be disconnected, and a failure test that the second stroke switch SQ2 cannot be disconnected is simulated.
Optionally, on the above basis, the power circuit receives a third trigger signal, and the third abnormal mode simulating the pressure failure at the outlet of the electric hydraulic pump 130 includes: when the seventh switch Q5 is triggered, the first solenoid valve DT1 switches the outlet of the electric hydraulic pump 130 to be communicated with the reservoir 110. Specifically, in the normal state, one of the first electromagnetic coil EL01 and the second electromagnetic coil EL02 of the first solenoid valve DT1 is always energized, and the other is always de-energized. When the seventh switch Q5 is triggered to be turned off, neither the first solenoid EL01 nor the second solenoid EL02 of the first solenoid valve DT1 is energized, the outlet of the oil pump is communicated with the oil tank through the first solenoid valve DT1, and the outlet pressure of the oil pump is abruptly reduced. The seventh switch Q5 is triggered to simulate an on-site oil pump outlet pressure drop fault test.
Optionally, in an embodiment of a hydraulic test method of the present invention, the method further includes: when the first coil EL01 of the first solenoid valve DT1 is electrified, a first indicator lamp HL1 is lightened; and/or the first indicator lamp HL2 is lightened when the second coil EL02 of the first electromagnetic valve DT1 is electrified. Specifically, the first indicator lamp HL1 is used for displaying the excitation condition of the first coil EL01 of the first electromagnetic valve, when EL01 is powered on, the indicator lamp HL1 is lighted, and when EL01 is powered off, the indicator lamp HL1 is not lighted; the second indicator lamp HL2 is used for displaying the excitation condition of the second coil EL02 of the first electromagnetic valve, the indicator lamp HL2 is lighted when EL02 is electrified, and the indicator lamp HL2 is not lighted when EL02 is not electrified. The normal test process of the hydraulic device can be confirmed by the state that the first indicator lamp HL1 and the second indicator lamp HL2 are alternately lighted.
Alternatively, on the basis of the above, in a hydraulic test method of the present invention, the operation mode includes: the power supply circuit receives a fourth trigger signal and drives the second electromagnetic valve DT2 to switch a first working mode of conducting the outlet of the electric hydraulic pump 130 and the first overflow valve PV 1; the power supply circuit receives a fifth trigger signal and drives a second electromagnetic valve DT2 to switch a second working mode of conducting the outlet of the electric hydraulic pump 130 and a second overflow valve PV 2; and a third working mode that the power supply circuit receives a sixth trigger signal and drives the second electromagnetic valve DT2 to be switched off so that the outlet of the electric hydraulic pump 130 is not communicated with the first overflow valve PV1 and the second overflow valve PV 2. Specifically, the first relief valve PV1, the second relief valve PV2 and the third relief valve PV3 are used for controlling the outlet pressure of the oil pump, the set pressures of the relief valves PV1, PV2 and PV3 are respectively P1, P2 and P3, P3 is greater than P1, and P3 is greater than P2. The inlet of the third overflow valve PV3 is connected with the outlet of the oil pump, and the outlet of the third overflow valve PV3 is connected with the oil tank. The inlet of the first relief valve PV1 is connected to the port a of the second solenoid valve DT2, and the outlet of the first relief valve PV1 is connected to the tank. The inlet of the second relief valve PV2 is connected to the B port of the second solenoid valve DT2, and the outlet of the second relief valve PV2 is connected to the tank. The P port of the second solenoid valve DT2 is connected to the oil pump outlet, and the T port of the second solenoid valve DT2 is connected to the oil tank. When the power circuit receives the sixth trigger signal and the second solenoid valve DT2 is not powered, only the third relief valve PV3 is connected to the outlet of the oil pump, and the outlet pressure of the oil pump is controlled by the third relief valve PV3, which corresponds to the third operating mode. When the power supply circuit receives the fifth trigger signal, the first electromagnetic coil EL03 of the second electromagnetic valve DT2 is powered, and the second electromagnetic coil EL04 is powered off, the second overflow valve PV2 and the third overflow valve PV3 are both connected with the outlet of the oil pump, the outlet pressure of the oil pump is controlled by the second overflow valve PV2 and the third overflow valve PV3 together, but because P3 is greater than P2, the outlet pressure of the oil pump is controlled by the second overflow valve PV2, which corresponds to the second working mode. When the power supply circuit receives the fourth trigger signal, the first electromagnetic coil EL03 of the second electromagnetic valve DT2 is de-energized, and the second electromagnetic coil EL04 is energized, the first overflow valve PV1 and the third overflow valve PV3 are both connected with the outlet of the oil pump, the outlet pressure of the oil pump is controlled by the first overflow valve PV1 and the third overflow valve PV3 together, but as P3 is greater than P1, the outlet pressure of the oil pump is controlled by the first overflow valve PV1, which corresponds to the first working mode. It can be understood that the set pressures of the relief valves PV1, PV2 and PV3 are respectively P1, P2 and P3, and P3 > P1, and P3 > P2 are normal, and the pressure values of the first relief valve PV1, the second relief valve PV2 and the third relief valve PV3 can be set in an operating mode to simulate the site pressure setting. If the pressure setting of the third relief valve PV3 is set to be smaller than the pressure setting of the first relief valve PV1 or the second relief valve PV2, a site pressure setting error failure can be simulated.
Optionally, on the basis above, the power supply circuit receiving the fourth trigger signal comprises triggering the ninth switch SB 2; the power supply circuit receiving the fifth trigger signal comprises triggering the eighth switch SB 1; the power supply circuit receiving the sixth trigger signal includes triggering the tenth switch SB 3. Specifically, the eighth switch SB1 is used for simulating and sending an emergency diesel engine or turbine (LLS diesel engine or turbine) start signal, i.e., a fifth trigger signal, and the ninth switch SB2 is used for simulating and sending a medium-pressure safety injection tank isolation valve 136VB valve opening signal, i.e., a fourth trigger signal. The LLS diesel engine or steam turbine is started, and the 136VB valve is not opened, so that the LLS diesel engine or steam turbine corresponds to a second working mode. It can be further understood that, the eighth switch SB1 is closed, simulating the start of an LLS diesel engine or steam turbine, the coil KA2a of the second relay is powered, the ninth switch SB2 is not closed, no 136VB valve opening signal is sent, when the coil KA3a of the third relay is powered off, the normally open contact KA2d of the second relay is closed, the normally closed contact KA3d of the third relay is closed, the first electromagnetic coil EL03 of the second electromagnetic valve DT2 is powered on, the normally closed contact KA2e of the second relay is open, the normally open contact KA3e of the third relay is open, and the second electromagnetic coil EL04 of the second electromagnetic valve DT2 is powered off. The LLS diesel or steam turbine is not started and the 136VB valve is opened corresponding to the first working mode. It can be further understood that when the LLS diesel engine or steam turbine is not started, that is, the eighth switch SB1 is open, the coil KA2a of the second relay is de-energized, the ninth switch SB2 is closed, and the simulation finds that the 136VB valve opening signal, and the coil KA3a of the third relay is energized, the normally open contact KA2d of the second relay is open, the normally closed contact KA3d of the third relay is open, the first electromagnetic coil EL03 of the second electromagnetic valve DT2 is de-energized, the normally closed contact KA2e of the second relay is closed, the normally open contact KA3e of the third relay is closed, and the second electromagnetic coil EL04 of the second electromagnetic valve DT2 is energized. The tenth switch SB3 is used to simulate the shutdown of the LLS diesel or steam turbine and close the 136VB valve, which corresponds to the third operating mode when the LLS diesel or steam turbine is not started and the 136VB valve is not opened. It can be further understood that when the LLS diesel engine or the steam turbine is not started, that is, the coil KA2a of the second relay is powered off, and the 136VB valve is not opened, that is, the coil KA3a of the third relay is powered off, the normally open contact KA2d of the second relay is opened, the normally closed contact KA3d of the third relay is closed, the first electromagnetic coil EL03 of the second electromagnetic valve DT2 is powered off, the normally closed contact KA2e of the second relay is closed, the normally open contact KA3e of the third relay is opened, and the second electromagnetic coil EL04 of the second electromagnetic valve DT2 is powered off.
Optionally, in an embodiment of the hydraulic test method of the present invention, the test method further includes a fourth abnormal mode, and the fourth abnormal mode includes: the power supply circuit receives a seventh trigger signal and drives the second electromagnetic valve DT2 to switch the outlet of the electric hydraulic pump 130 to be not conducted with the first overflow valve PV1 and the second overflow valve PV 2; the power circuit receives the seventh trigger signal and the second solenoid valve DT2 is turned off. Specifically, under normal conditions, the start of the LLS diesel engine or the steam turbine and the opening of the 136VB valve cannot exist at the same time, that is, the coil KA2a of the second relay and the coil KA3a of the third relay cannot be powered at the same time, when the 136VB valve is opened, that is, the coil KA3a of the third relay is powered, when the eighth switch SB1 is closed, that is, when a start signal of the LLS diesel engine or the steam turbine is simulated to be sent, the normally closed contact KA2c of the second relay is disconnected, and the coil KA3a of the third relay loses power, that is, the 136VB valve is simulated to be automatically locked and closed. In actual situations, the 136VB valve is forced to be in an open state temporarily by wiring, and if the LLS diesel engine or the steam turbine is started by mistake, the 136VB valve cannot be closed automatically, the first electromagnetic coil EL03 and the second electromagnetic coil EL04 of the second electromagnetic valve DT2 are not powered, and the operation mode is wrong. In this example, the seventh trigger signal may be triggered to enable the coil KA3a of the third relay to be always in a powered state, that is, the valve 136VB is forcibly set to be always in an open state through a connection, at this time, the eighth switch SB1 is closed again, that is, when the start signal of the LLS diesel engine or the steam turbine is sent out in a simulation mode, the coil KA2a of the second relay is powered on, at this time, the coil KA3a of the third relay cannot be powered off, and the first electromagnetic coil EL03 and the second electromagnetic coil EL04 of the second electromagnetic valve DT2 are not powered on, so as to perform an operation mode error test, that is, a fourth abnormality test.
Optionally, on the above basis, the receiving, by the power supply circuit, the seventh trigger signal includes: the seventh trigger signal may be issued by activating the eleventh switch Q6, closing the eleventh switch Q6.
Optionally, in an embodiment of a hydraulic test method of the present invention, the method further includes: in the first working mode, a sixth indicator lamp HL6 is lightened; and/or in the second working mode, lighting a fifth indicator lamp HL 5; and/or a seventh indicator lamp HL7 is lit during the fourth abnormal mode. Specifically, the indicator lamp HL6 is used for simulating the valve state of the 136VB of the medium-pressure safety injection tank isolation valve in the field, the indicator lamp HL6 is lightened to indicate that the 136VB valve is opened, and the indicator lamp HL6 is extinguished to indicate that the 136VB valve is closed. It can be understood that, in the first operation mode, when the eighth switch SB1 is not closed and the eleventh switch Q6 is not closed, after the ninth switch SB2 is closed, the coil KA3a of the third relay is energized, the sixth indicator lamp HL6 is illuminated, and after the ninth switch SB2 is opened, the coil KA3a of the third relay is energized continuously by the self-holding circuit formed by the normally open contact KA3b of the third relay, and the sixth indicator lamp HL6 is kept in the "illuminated" state.
The fifth indicator light is used for simulating the state of the LLS emergency diesel engine or the steam turbine, the indicator light HL5 is lightened to indicate that the diesel engine or the steam turbine is in the running state, and the indicator light HL5 is extinguished to indicate that the diesel engine or the steam turbine is in the shutdown state. It can be understood that in the second operation mode, after the eighth switch SB1 is closed, the coil KA2a of the second relay is energized, the fifth indicator light HL5 is illuminated, and after the eighth switch SB1 is opened, the coil KA2a of the second relay is continuously energized under the action of the self-holding circuit formed by the normally open contact KA2b of the second relay, and the fifth indicator light HL5 is kept in an "illuminated" state. When the coil KA2a of the second relay or the coil KA3a of the third relay is powered on, after the tenth switch SB3 is pressed, the coil KA2a of the second relay or the coil KA3a of the third relay loses power, and the fifth indicator lamp HL5 or the sixth indicator lamp HL6 is turned off.
When the fourth abnormal test is carried out, when the eleventh switch Q6 is closed, the 136VB valve is forcibly opened in a simulation mode, the coil KA3a of the third relay is always in an electrified state, when the eighth switch SB1 is closed again, the coil KA2a of the second relay is also electrified, the normally open contact KA2g of the second relay and the normally open contact KA3g of the third relay are both closed, the seventh indicator lamp HL7 is electrified at the moment, and a fault alarm signal is displayed through the seventh indicator lamp HL 7.
Optionally, in an embodiment of a hydraulic test method of the present invention, the method further includes: when the first coil EL03 of the second electromagnetic valve is electrified, a third indicator lamp HL3 is lightened; and/or a fourth indicator lamp HL4 is lightened when the second coil EL04 of the second electromagnetic valve is electrified. Specifically, the third indicator lamp HL3 is used for displaying the excitation condition of the first coil EL03 of the second electromagnetic valve, when EL03 is powered on, the indicator lamp HL3 is lighted, and when EL03 is powered off, the indicator lamp HL3 is not lighted; the fourth indicator lamp HL4 is used for displaying the excitation condition of the second coil EL04 of the second electromagnetic valve, the indicator lamp HL4 is lighted when EL04 is electrified, and the indicator lamp HL4 is not lighted when EL04 is not electrified. It can be understood that, under the normal operation condition, the state that the first overflow valve PV1 is connected with the oil pump outlet can be indicated by lighting the fourth indicator lamp HL4, namely corresponding to the first operation mode, and the state that the second overflow valve PV2 is connected with the oil pump outlet can be indicated by lighting the third indicator lamp HL3, namely corresponding to the second operation mode. The first overflow valve PV1 and the second overflow valve PV2 can be correspondingly indicated to be in a state of non-conductive connection with the oil pump outlet in a state that the third indicator lamp HL3 and the fourth indicator lamp HL4 are both not lighted, and the state corresponds to a third working mode.
It is to be understood that the foregoing examples, while indicating the preferred embodiments of the invention, are given by way of illustration and description, and are not to be construed as limiting the scope of the invention; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several changes and modifications can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.

Claims (18)

1. A hydraulic test apparatus, comprising: an electric hydraulic pump (130), a liquid storage tank (110) connected with an inlet conduit of the electric hydraulic pump (130), a first solenoid valve (DT1) connected with an outlet conduit of the electric hydraulic pump (130), a double-acting hydraulic cylinder (140) connected with a conduit of the first solenoid valve (DT1), and a first overflow valve (PV1), a second overflow valve (PV2) and a third overflow valve (PV3) arranged between an outlet of the electric hydraulic pump (130) and the liquid storage tank (110);
inlets of the first overflow valve (PV1) and the second overflow valve (PV2) are respectively connected with an outlet conduit of the electric hydraulic pump (130) through a second electromagnetic valve (DT2), outlets of the first overflow valve (PV1) and the second overflow valve (PV2) are connected with a conduit of the liquid storage tank (110), an inlet of the third overflow valve (PV3) is connected with an outlet conduit of the electric hydraulic pump (130), and an outlet of the third overflow valve (PV3) is connected with a conduit of the liquid storage tank (110);
a stroke baffle (150) is arranged at the top of the exposed end of a piston rod (143) of the double-acting hydraulic cylinder (140), and a first stroke switch (SQ1) and a second stroke switch (SQ2) which can be driven by the stroke baffle (150) are arranged on two sides of the stroke baffle (150); and
a power supply circuit connected to the electric hydraulic pump (130), the first solenoid valve (DT1), the second solenoid valve (DT2), and the first stroke switch (SQ1) and the second stroke switch (SQ 2);
the power circuit is used for controlling the first solenoid valve (DT1) to switch the outlet of the electric hydraulic pump (130) to be communicated with the first oil chamber (141) or the second oil chamber (142) of the double-acting hydraulic cylinder (140) respectively;
the power supply circuit is also used for controlling the second electromagnetic valve (DT2) to switch the outlet of the electric hydraulic pump (130) to be communicated with the first overflow valve (PV1) or the second overflow valve (PV2) respectively;
the first overflow valve (PV1), the second overflow valve (PV2) and the third overflow valve (PV3) are used for controlling the pump outlet pressure of the oil pump, the set pressure is respectively set to be P1, P2 and P3, P3 is greater than P1, and P3 is greater than P2.
2. The hydraulic test apparatus of claim 1, further comprising:
a pressure gauge (160) connecting the electrically-powered hydraulic pump (130) and the second solenoid valve (DT 2); and/or
A filter (120) connecting the electrically-driven hydraulic pump (130) and the reservoir (110).
3. The hydraulic test rig of claim 1, wherein the conduit connection is optionally a transparent hose connection;
the double-acting hydraulic cylinder (140), the first electromagnetic valve (DT1), the second electromagnetic valve (DT2), the first overflow valve (PV1), the second overflow valve (PV2) and the third overflow valve (PV3) are all made of transparent materials.
4. The hydraulic test apparatus according to claim 1, wherein the power circuit comprises a first switch (QS1), a fuse (FU1), a dc converter (210), and a first power circuit (220) and a second power circuit (230) connected to the dc converter (210);
the direct current converter (210) is connected with an external power supply through the fuse (FU1) and the first switch (QS1), and provides direct current power supply for the first power supply circuit (220) and the second power supply circuit (230);
the first power circuit (220) is used for controlling the first solenoid valve (DT1) to switch the electric hydraulic pump outlet to be communicated with the first oil chamber (141) or the second oil chamber (142) of the double-acting hydraulic cylinder respectively;
the second power circuit (230) is used for controlling the second electromagnetic valve (DT2) to switch the outlet of the electric hydraulic pump to be communicated with the first overflow valve (PV1) or the second overflow valve (PV2) respectively.
5. The hydraulic test device according to claim 4, characterized in that the power circuit further comprises a second switch (QS2), a frequency converter (240), an external power source being connected to the electrically operated hydraulic pump (130) via the first switch (QS1), the second switch (QS2) and the frequency converter (240).
6. The hydraulic test apparatus of claim 5,
the first power supply circuit (220) comprises a first relay;
the coil (KA1a) of the first relay is connected to the DC converter (210) via a third switch (Q1) and the first stroke switch (SQ1), the first stroke switch (SQ1) being connected in parallel to a fourth switch (Q2);
a coil (KA1a) of the first relay is connected with a first pair of contacts (KA1b), a fifth switch (Q3) and the second stroke switch (SQ2) of the first relay in series and then connected with the direct current converter (210), and the second stroke switch (SQ2) is connected with a sixth switch (Q4) in parallel;
a first electromagnetic coil (EL01) of the first electromagnetic valve (DT1) is connected with the direct current converter (210) after being connected in series through a second pair of contacts (KA1c) of the first relay and a seventh switch (Q5);
a second electromagnetic coil (EL02) of the first electromagnetic valve (DT1) is connected in series with the dc converter (210) through a third pair of contacts (KA1d) of the first relay and the seventh switch (Q5); and/or
The second power supply circuit (230) comprises a second relay and a third relay;
a coil (KA2a) of the second relay is connected to the dc converter (210) via an eighth switch (SB1) and a tenth switch (SB 3); the eighth switch (SB1) is connected in parallel with the first pair of contacts (KA2b) of the second relay;
a coil (KA3a) of the third relay is connected to the dc converter (210) via a second pair of contacts (KA2c), a ninth switch (SB2) and the tenth switch (SB3) of the second relay; the ninth switch (SB2) is connected in parallel with the first contact (KA3b) of the third relay; a coil (KA3a) of the third relay is connected with the tenth switch (SB3) through an eleventh switch (Q6);
the first solenoid (EL03) of the second solenoid valve (DT2) is connected to the dc converter (210) via the third pair of contacts (KA3d) of the third relay and the third pair of contacts (KA2d) of the second relay;
the second solenoid (EL04) of the second solenoid valve (DT2) is connected to the dc converter (210) via the fourth contact (KA3e) of the third relay and the fourth pair of contacts (KA2e) of the second relay.
7. The hydraulic test apparatus of claim 6, wherein the first power circuit (220) further comprises: a first indicator light (HL1) and/or a second indicator light (HL 2);
a first solenoid (EL01) of the first solenoid valve (DT1) is connected in parallel with the first indicator lamp (HL 1);
a second solenoid (EL02) of the first solenoid valve (DT1) is connected in parallel with the second indicator lamp (HL 2);
and/or
The second power supply circuit (230) further comprises one or more of a third indicator lamp (HL3), a fourth indicator lamp (HL4), a fifth indicator lamp (HL5), a sixth indicator lamp (HL6) and a seventh indicator lamp (HL 7);
the first solenoid (EL03) of the second solenoid valve (DT2) is connected in parallel with the third indicator lamp (HL 3);
a second solenoid (EL04) of the second solenoid valve (DT2) is connected in parallel with the fourth indicator lamp (HL 4);
the fifth indicator light (HL5) is connected with the direct current converter (210) through a fifth pair of contacts (KA2f) of the second relay;
the sixth indicator light (HL6) is connected with the direct current converter (210) through a fifth pair of contacts (KA3f) of the third relay;
the seventh indicator lamp (HL7) is connected with the DC converter (210) through a sixth pair of contacts (KA3g) of the third relay and a sixth pair of contacts (KA2g) of the second relay.
8. The hydraulic test apparatus according to claim 6, wherein the first switch (QS1) and the second switch (QS2) are load switches;
the third switch (Q1), the fourth switch (Q2), the fifth switch (Q3), the sixth switch (Q4), the seventh switch (Q5) and the eleventh switch (Q6) are key switches;
the eighth switch (SB1), the ninth switch (SB2), and the tenth switch (SB3) are push-button switches.
9. A hydraulic test method using the hydraulic test apparatus according to any one of claims 1 to 8, comprising: an operation mode in which the first solenoid valve (DT1), the first stroke switch (SQ1) and the second stroke switch (SQ2) are normally operated when the power supply circuit is started and the electric hydraulic pump (130) is operated, and
-said power circuit receives a first trigger signal simulating a first abnormal pattern of failure of said first stroke switch (SQ 1);
the power circuit receives a second trigger signal and simulates a second abnormal mode of the fault of the second travel switch (SQ 2);
the power circuit receives a third trigger signal and simulates a third abnormal mode of outlet pressure failure of the electric hydraulic pump (130);
the working mode comprises the following steps:
s1, the power circuit triggers a first solenoid valve (DT1) to switch the outlet of the electric hydraulic pump (130) to be communicated with a second oil chamber (142) of the double-acting hydraulic cylinder, and a piston (144) of the double-acting hydraulic cylinder starts to move along a first direction;
s2, the double-acting hydraulic cylinder piston (144) moves to the stroke baffle (150) at the top of the outer end of the piston rod of the double-acting hydraulic cylinder to contact the first stroke switch (SQ 1);
s3, the first stroke switch (SQ1) is actuated, the power circuit triggers the first solenoid valve (DT1) to switch the electric hydraulic pump (130) outlet into communication with the first oil chamber (141) of the double acting hydraulic cylinder, the double acting hydraulic cylinder piston (144) starts to move in the second direction;
s4, the double acting hydraulic cylinder piston (144) moving to the stroke stop (150) contacting the second stroke switch (SQ 2);
s5, the second stroke switch (SQ2) is driven, and the process returns to the step S1.
10. Test method according to claim 9, characterized in that said power supply circuit receives a first trigger signal, said simulating a first abnormal pattern of failure of said first stroke switch (SQ1) comprising:
triggering a third switch (Q1) to open, and opening the connection between the first stroke switch (SQ1) and a coil (KA1a) of a first relay so as to simulate the fault that the first stroke switch (SQ1) cannot be closed; or
Triggering a fourth switch (Q2) to close, shorting the first stroke switch (SQ1) to simulate the first stroke switch (SQ1) failing to open fault.
11. The hydraulic test method of claim 9, wherein the power circuit receives a second trigger signal, and simulating a second abnormal pattern of failure of the second stroke switch (SQ2) comprises:
triggering a fifth switch (Q3) to open, and opening the connection between the second stroke switch (SQ2) and a coil (KA1a) of a first relay so as to simulate the fault that the second stroke switch (SQ2) cannot be closed; or
Triggering a sixth switch (Q4) to close, shorting the second stroke switch (SQ2) to simulate the second stroke switch (SQ2) failing to open the fault.
12. The hydraulic test method of claim 9, wherein the power circuit receives a third trigger signal, and a third abnormal pattern simulating a failure in outlet pressure of the electrically-powered hydraulic pump (130) comprises:
and triggering a seventh switch (Q5) to be disconnected, wherein the first electromagnetic valve (DT1) switches the outlet of the electric hydraulic pump (130) to be communicated with the liquid storage tank (110).
13. The hydraulic test method of claim 9, further comprising:
when a first electromagnetic coil (EL01) of a first electromagnetic valve (DT1) is electrified, a first indicator lamp (HL1) is lightened; and/or
When the second electromagnetic coil (EL02) of the first solenoid valve (DT1) is energized, a second indicator lamp (HL2) is lighted.
14. The hydraulic test method of claim 9, wherein the operating mode comprises:
the power supply circuit receives a fourth trigger signal and drives a second electromagnetic valve (DT2) to switch a first working mode that the outlet of the electric hydraulic pump (130) is conducted with a first overflow valve (PV 1);
the power supply circuit receives a fifth trigger signal and drives the second electromagnetic valve (DT2) to switch a second working mode of the outlet of the electric hydraulic pump (130) and a second overflow valve (PV 2); and
and the power supply circuit receives a sixth trigger signal and drives the second electromagnetic valve (DT2) to be turned off, so that the outlet of the electric hydraulic pump (130) is not communicated with the first overflow valve (PV1) and the second overflow valve (PV 2).
15. The hydraulic test method of claim 14,
the power circuit receiving a fourth trigger signal includes triggering a ninth switch (SB 2);
the power supply circuit receiving a fifth trigger signal includes triggering an eighth switch (SB 1);
the power circuit receiving the sixth trigger signal includes triggering a tenth switch (SB 3).
16. The hydraulic test method of claim 14, further comprising a fourth anomaly mode, the fourth anomaly mode comprising:
the power circuit receives a seventh trigger signal and drives the second solenoid valve (DT2) to switch the outlet of the electric hydraulic pump (130) to be non-conductive with the first overflow valve (PV1) and the second overflow valve (PV 2).
17. The hydraulic test method of claim 16, wherein the power circuit receiving a seventh trigger signal includes triggering an eleventh switch (Q6).
18. The hydraulic test method of claim 16, further comprising:
illuminating a sixth indicator light (HL6) during the first mode of operation; and/or
-in said second operating mode, illuminating a fifth indicator light (HL 5); and/or
Illuminating a seventh indicator light (HL7) when in the fourth abnormal mode; and/or
When the first electromagnetic coil (EL03) of the second electromagnetic valve (DT2) is electrified, a third indicator lamp (HL3) is lightened; and/or
When the second solenoid (EL04) of the second solenoid valve (DT2) is energized, a fourth indicator lamp (HL4) is lit.
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