CN214838782U - Electro-hydraulic actuator capable of detecting and replacing electromagnetic valve on line - Google Patents
Electro-hydraulic actuator capable of detecting and replacing electromagnetic valve on line Download PDFInfo
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- CN214838782U CN214838782U CN202121264025.4U CN202121264025U CN214838782U CN 214838782 U CN214838782 U CN 214838782U CN 202121264025 U CN202121264025 U CN 202121264025U CN 214838782 U CN214838782 U CN 214838782U
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Abstract
The utility model relates to an executor technical field specifically is an electro-hydraulic actuator that can on-line measuring and change solenoid valve, include encoder, executor pneumatic cylinder be connected with the valve and for its hydraulic pump system that provides the oil pressure the executor pneumatic cylinder with it has first tribit four-way solenoid valve and second tribit four-way solenoid valve to connect in parallel between the hydraulic pump system, the encoder the hydraulic pump system first tribit four-way solenoid valve with second tribit four-way solenoid valve is connected with control system. The device not only ensures the uninterrupted work, but also can realize the online replacement or the maintenance of the failed electromagnetic valve, and can greatly improve the working efficiency and the service life of equipment.
Description
Technical Field
The utility model relates to an executor technical field especially relates to a but on-line measuring and change electro-hydraulic actuator of solenoid valve.
Background
The electro-hydraulic actuator is an actuator which converts standard input signals (4-20mA, D.C.) into angular displacement output torque or linear displacement output force of 0-90 degrees corresponding to the input signals through electro-hydraulic conversion and hydraulic amplification. Compared with the traditional pneumatic actuating mechanism and electric actuating mechanism, the electro-hydraulic actuating mechanism has the advantages of being large in stroke, large in thrust or moment, high in intelligent degree, fast in response time, high in sensitivity, compact in mechanism, fireproof and the like. The existing electro-hydraulic actuator is usually controlled by only one two-position four-way solenoid valve to switch oil ways, so that the purpose of closing or opening the valve is achieved. However, if the two-position four-way solenoid valve fails during operation, normal operation is affected, and the operating progress needs to be cut off during replacement, which also affects the operating efficiency.
Therefore, a technique for solving this problem is urgently required.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art's problem, provide an but on-line measuring and change electro-hydraulic actuator of solenoid valve, through adopting two first tribit four-way solenoid valves and the second tribit four-way solenoid valve that the specification is the same of control system simultaneous control, ensure that wherein arbitrary one participates in work, when breaking down, only need switch over the solenoid valve and make it continue to accomplish unfinished instruction through redundant technology can. Not only ensures uninterrupted work, but also can realize on-line replacement or maintenance of the failed electromagnetic valve.
The above purpose is realized by the following technical scheme:
an electro-hydraulic actuator capable of detecting and replacing an electromagnetic valve on line comprises an encoder, an actuator hydraulic cylinder and a hydraulic pump system, wherein the encoder is connected with a valve, the hydraulic pump system is used for providing oil pressure for the actuator hydraulic cylinder, and a first three-position four-way electromagnetic valve and a second three-position four-way electromagnetic valve are connected between the actuator hydraulic cylinder and the hydraulic pump system in parallel; the actuator hydraulic cylinder is internally divided into a first chamber and a second chamber through a piston, a first oil port is formed in the first chamber, and a second oil port is formed in the second chamber; the hydraulic pump system is connected with a first three-way joint through an oil pipe, and the other two interfaces of the first three-way joint are respectively connected with a port P of the first three-position four-way electromagnetic valve and a port P of the second three-position four-way electromagnetic valve; the port A of the first three-position four-way electromagnetic valve and the port A of the second three-position four-way electromagnetic valve are respectively connected with a second three-way joint through oil pipes, and the other port of the second three-way joint is connected with the second oil port of the actuator hydraulic cylinder through the oil pipe; the port B of the first three-position four-way electromagnetic valve and the port B of the second three-position four-way electromagnetic valve are respectively connected with a third three-way joint through oil pipes, and the other port of the third three-way joint is connected with the first oil port of the actuator hydraulic cylinder through an oil pipe; the T port of the first three-position four-way electromagnetic valve and the T port of the second three-position four-way electromagnetic valve are respectively connected with a fourth three-way joint through oil pipes, and the other port of the fourth three-way joint is connected with an oil tank of the hydraulic pump system through an oil pipe;
a first stop valve is arranged between the first three-position four-way electromagnetic valve and the P port of the first three-position four-way electromagnetic valve, a second stop valve is arranged between the A port of the first three-position four-way electromagnetic valve and the second three-way joint, a third stop valve is arranged between the B port of the first three-position four-way electromagnetic valve and the third three-way joint, a fourth stop valve is arranged between the first three-way joint and the P port of the second three-position four-way electromagnetic valve, a fifth stop valve is arranged between the A port of the second three-position four-way electromagnetic valve and the second three-way joint, and a sixth stop valve is arranged between the B port of the second three-position four-way electromagnetic valve and the third three-way joint;
the encoder, the hydraulic pump system, the first three-position four-way solenoid valve and the second three-position four-way solenoid valve are connected with a control system.
Further, a check valve, a pressure sensor, an energy storage tank, a pressure gauge and a throttle valve are sequentially connected between the hydraulic pump system and the first three-way joint.
Further, the hydraulic pump system adopts the gear pump with still be provided with the filter between the oil tank.
A method for detecting and replacing an electro-hydraulic actuator of an electromagnetic valve on line is characterized in that an instruction module for controlling the opening or closing of a valve is configured in a control system, and the instruction module is divided into a finished instruction and an unfinished instruction according to the finished state; the control system judges the completion condition of the completed instruction through the encoder;
the control system issues a valve opening or closing instruction to the first three-position four-way electromagnetic valve, detects the working state of the first three-position four-way electromagnetic valve through the encoder, and updates the completed instruction and the unfinished instruction in real time;
if the unfinished instruction is larger than 0 and the encoder stops working, the valve is opened or closed unfinished, the control system judges that the first three-position four-way electromagnetic valve has a fault, and sends the unfinished instruction to the second three-position four-way electromagnetic valve for residual operation;
and if the unfinished command is equal to 0, opening or closing of the valve is finished, and the first three-position four-way electromagnetic valve does not have a fault.
Further, if the first three-position four-way solenoid valve fails, the first stop valve, the second stop valve and the third stop valve are closed, and the first three-position four-way solenoid valve is replaced on line.
Further, after the first three-position four-way solenoid valve is replaced, the first stop valve, the second stop valve, and the third stop valve are opened.
Further, when the first three-position four-way electromagnetic valve works at the left position, the hydraulic pump system supplies oil to the first cavity and drives the piston to move rightwards, oil in the second cavity flows back into the oil tank, and the valve is closed;
when the first three-position four-way electromagnetic valve works in the middle position, the control system does not work, and the valve does not react;
when the first three-position four-way electromagnetic valve works at the right position, the hydraulic pump system supplies oil to the second chamber and drives the piston to move leftwards, oil in the first chamber flows back into the oil tank, and the valve is opened.
Further, when the first three-position four-way electromagnetic valve fails, the second three-position four-way electromagnetic valve participates in working;
when the second three-position four-way electromagnetic valve works at the left position, the hydraulic pump system supplies oil to the first cavity and drives the piston to move rightwards, oil in the second cavity flows back into the oil tank, and the valve is closed;
when the second three-position four-way electromagnetic valve works in the middle position, the control system does not work, and the valve does not react;
when the second three-position four-way electromagnetic valve works at the right position, the hydraulic pump system supplies oil to the second chamber and drives the piston to move leftwards, oil in the first chamber flows back into the oil tank, and the valve is opened.
Advantageous effects
The utility model provides a but on-line measuring and change electro-hydraulic actuator of solenoid valve, through adopting two first tribit four-way solenoid valves and the tribit four-way solenoid valve of second that the specification is the same of control system simultaneous control, ensure that wherein arbitrary one participates in work, when breaking down, only need switch over to another solenoid valve and make it continue to accomplish unfinished instruction through redundant technology can, not only ensured incessantly of work, but also can realize changing on line or overhauing the solenoid valve that breaks down, can provide the life of work efficiency and equipment greatly.
Drawings
Fig. 1 is a schematic structural diagram of an electro-hydraulic actuator capable of detecting and replacing a solenoid valve on line according to the present invention;
fig. 2 is a schematic view of the first three-position four-way solenoid valve control valve of the electro-hydraulic actuator of the present invention capable of detecting and replacing the solenoid valve on line;
fig. 3 is a schematic view of the first three-position four-way solenoid valve control valve of the electro-hydraulic actuator of the present invention capable of detecting and replacing the solenoid valve on line;
fig. 4 is a schematic view of the second three-position four-way solenoid valve of the electro-hydraulic actuator of the present invention for on-line detection and replacement of the solenoid valve;
fig. 5 is a schematic diagram of the second three-position four-way solenoid valve control valve of the electro-hydraulic actuator capable of detecting and replacing the solenoid valve on line.
Graphic notation:
1-actuator hydraulic cylinder, 1-1-first chamber, 1-2-second chamber, 1-3-first oil port, 1-4-second oil port, 1-5-piston, 2-hydraulic pump system, 3-first three-position four-way electromagnetic valve, 3-1-first coil, 3-2-second coil, 4-second three-position four-way electromagnetic valve, 4-1-third coil, 4-1-fourth coil, 5-first three-way joint, 6-second three-way joint, 7-third three-way joint, 8-third three-way joint, 9-first stop valve, 10-second stop valve, 11-third stop valve, 12-fourth stop valve, 13-fifth stop valve, 14-a sixth stop valve, 15-a gear pump, 16-a filter, 17-an oil tank, 18-a one-way valve, 19-a pressure sensor, 20-an energy storage tank, 21-a pressure gauge, 22-a throttle valve and 23-an oil pipe.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. The described embodiments are only some, but not all embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention
As shown in fig. 1, an electro-hydraulic actuator capable of detecting and replacing electromagnetic valves on line comprises an encoder connected with a valve, an actuator hydraulic cylinder 1 and a hydraulic pump system 2 for providing oil pressure for the actuator hydraulic cylinder 1, wherein a first three-position four-way electromagnetic valve 3 and a second three-position four-way electromagnetic valve 4 are connected in parallel between the actuator hydraulic cylinder 1 and the hydraulic pump system 2;
the hydraulic cylinder 1 of the actuator is divided into a first chamber 1-1 and a second chamber 1-2 by a piston 1-5, a first oil port 1-3 is formed in the first chamber 1-1, and a second oil port 1-4 is formed in the second chamber 1-3;
the hydraulic pump system 2 is connected with a first three-way joint 5 through an oil pipe 23, and the other two interfaces of the first three-way joint 5 are respectively connected with a port P of the first three-position four-way electromagnetic valve 3 and a port P of the second three-position four-way electromagnetic valve 4; the port A of the first three-position four-way electromagnetic valve 3 and the port A of the second three-position four-way electromagnetic valve 4 are respectively connected with a second three-way joint 6 through oil pipes 23, and the other port of the second three-way joint 6 is connected with the second oil ports 1-4 of the actuator hydraulic cylinder 1 through the oil pipes 23; the port B of the first three-position four-way electromagnetic valve 3 and the port B of the second three-position four-way electromagnetic valve 4 are respectively connected with a third three-way joint 7 through an oil pipe 23, and the other port of the third three-way joint 7 is connected with the first oil ports 1-3 of the actuator hydraulic cylinder 1 through the oil pipe 23; the T port of the first three-position four-way electromagnetic valve 3 and the T port of the second three-position four-way electromagnetic valve 4 are respectively connected with a fourth three-way joint 8 through an oil pipe 23, and the other port of the fourth three-way joint 8 is connected with an oil tank 17 of the hydraulic pump system 2 through the oil pipe 23;
a first stop valve 9 is arranged between the first three-way joint 5 and the port P of the first three-position four-way electromagnetic valve 3, a second stop valve 10 is arranged between the port a of the first three-position four-way electromagnetic valve 3 and the second three-way joint 6, a third stop valve 11 is arranged between the port B of the first three-position four-way electromagnetic valve 3 and the third three-way joint 7, a fourth stop valve 12 is arranged between the first three-way joint 5 and the port P of the second three-position four-way electromagnetic valve 4, a fifth stop valve 13 is arranged between the port a of the second three-position four-way electromagnetic valve 4 and the second three-way joint 6, and a sixth stop valve 14 is arranged between the port B of the second three-position four-way electromagnetic valve 4 and the third three-way joint 7;
the encoder, the hydraulic pump system 2, the first three-position four-way solenoid valve 3 and the second three-position four-way solenoid valve 4 are connected with a control system.
As an optimization of the embodiment, a check valve 18, a pressure sensor 19, an energy storage tank 20, a pressure gauge 21 and a throttle 22 are sequentially connected between the hydraulic pump system 2 and the first three-way joint 5, so as to achieve better control or reading of the oil pressure.
In this device, hydraulic pump system 2 adopts gear pump 15 with still be provided with filter 16 between the oil tank 17 for carry out filtration treatment to the oil of output.
The utility model also provides a method of the electro-hydraulic actuator of the electromagnetic valve that can be detected and changed on line, dispose the order module used for controlling the valve to open or close in the said control system, the said order module is divided into finished order and unfinished order according to the state finished; the control system judges the completion condition of the completed instruction through the encoder, and comprises the following steps:
the control system issues a valve opening or closing instruction to the first three-position four-way solenoid valve 3, detects the working state of the first three-position four-way solenoid valve 3 through the encoder (when the first three-position four-way solenoid valve 3 works, oil pressure can be generated in an oil pipe 23 and acts on the valve, the rotation of the valve can be acquired by the encoder and fed back to the control system), and meanwhile, the completed instruction and the unfinished instruction are updated in real time;
if the unfinished instruction is equal to 0, opening or closing of the valve is finished, and the first three-position four-way electromagnetic valve 3 does not break down;
if the unfinished instruction is larger than 0 and the encoder stops working, the valve is not opened or closed, the control system judges that the first three-position four-way electromagnetic valve 3 has a fault and sends the unfinished instruction to the second three-position four-way electromagnetic valve 4 for residual operation;
if the first three-position four-way solenoid valve 3 fails, the first stop valve 9, the second stop valve 10, and the third stop valve 11 are closed, the first three-position four-way solenoid valve 3 is replaced online, and after the first three-position four-way solenoid valve 3 is replaced, the first stop valve 9, the second stop valve 10, and the third stop valve 11 are continuously opened.
As a further description of the present embodiment:
as shown in fig. 2, when the first three-position four-way solenoid valve 3 operates in the left position (i.e., the port P is communicated with the port B, and the port T is communicated with the port a), the hydraulic pump system 2 supplies oil to the first chamber 1-1 and drives the piston 1-5 to move rightward, the oil in the second chamber 1-2 flows back to the oil tank 17, and the valve is closed;
when the first three-position four-way electromagnetic valve 3 works in the middle position (namely the port P is communicated with the port B, and the port T is not communicated with the port A), the control system does not work, and the valve does not react;
as shown in fig. 3, when the first three-position four-way solenoid valve 3 operates at the right position (i.e., the port P is communicated with the port a, and the port T is communicated with the port B), the hydraulic pump system 2 supplies oil to the second chamber 1-2, drives the piston 1-5 to move leftward, returns the oil in the first chamber 1-1 to the oil tank 17, and opens the valve.
When the first three-position four-way solenoid valve 3 fails, the second three-position four-way solenoid valve 4 participates in the work and continues to complete the unfinished instruction of the first three-position four-way solenoid valve 3, including:
as shown in fig. 4, when the second three-position four-way solenoid valve 4 operates in the left position (i.e., the port P is communicated with the port B, and the port T is communicated with the port a), the hydraulic pump system 2 supplies oil to the first chamber 1-1 and drives the piston 1-5 to move rightward, the oil in the second chamber 1-2 flows back to the oil tank 17, and the valve is closed;
when the second three-position four-way electromagnetic valve 4 works in the middle position (namely, the port P is communicated with the port A, and the port T is communicated with the port B), the control system does not work, and the valve does not react;
as shown in fig. 5, when the second three-position four-way solenoid valve 4 operates in the right position (i.e., the port P is communicated with the port a, and the port T is communicated with the port B), the hydraulic pump system supplies oil to the second chamber 1-2 and drives the piston 1-5 to move leftward, the oil in the first chamber 1-1 flows back to the oil tank 17, and the valve is opened.
The above description is only for the purpose of illustrating embodiments of the present invention and should not be taken as limiting the invention, and any modifications, equivalents, improvements and the like made by those skilled in the art within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (3)
1. An electro-hydraulic actuator capable of detecting and replacing electromagnetic valves on line comprises an encoder, an actuator hydraulic cylinder and a hydraulic pump system, wherein the encoder is connected with a valve;
the actuator hydraulic cylinder is internally divided into a first chamber and a second chamber through a piston, a first oil port is formed in the first chamber, and a second oil port is formed in the second chamber;
the hydraulic pump system is connected with a first three-way joint through an oil pipe, and the other two interfaces of the first three-way joint are respectively connected with a port P of the first three-position four-way electromagnetic valve and a port P of the second three-position four-way electromagnetic valve; the port A of the first three-position four-way electromagnetic valve and the port A of the second three-position four-way electromagnetic valve are respectively connected with a second three-way joint through oil pipes, and the other port of the second three-way joint is connected with the second oil port of the actuator hydraulic cylinder through the oil pipe; the port B of the first three-position four-way electromagnetic valve and the port B of the second three-position four-way electromagnetic valve are respectively connected with a third three-way joint through oil pipes, and the other port of the third three-way joint is connected with the first oil port of the actuator hydraulic cylinder through an oil pipe; the T port of the first three-position four-way electromagnetic valve and the T port of the second three-position four-way electromagnetic valve are respectively connected with a fourth three-way joint through oil pipes, and the other port of the fourth three-way joint is connected with an oil tank of the hydraulic pump system through an oil pipe;
a first stop valve is arranged between the first three-position four-way electromagnetic valve and the P port of the first three-position four-way electromagnetic valve, a second stop valve is arranged between the A port of the first three-position four-way electromagnetic valve and the second three-way joint, a third stop valve is arranged between the B port of the first three-position four-way electromagnetic valve and the third three-way joint, a fourth stop valve is arranged between the first three-way joint and the P port of the second three-position four-way electromagnetic valve, a fifth stop valve is arranged between the A port of the second three-position four-way electromagnetic valve and the second three-way joint, and a sixth stop valve is arranged between the B port of the second three-position four-way electromagnetic valve and the third three-way joint;
the encoder, the hydraulic pump system, the first three-position four-way solenoid valve and the second three-position four-way solenoid valve are connected with a control system.
2. The electro-hydraulic actuator capable of detecting and replacing the solenoid valve online as claimed in claim 1, wherein a check valve, a pressure sensor, an energy storage tank, a pressure gauge and a throttle valve are connected in sequence between the hydraulic pump system and the first three-way joint.
3. The electro-hydraulic actuator capable of detecting and replacing the solenoid valve online according to claim 1, wherein the hydraulic pump system adopts a gear pump, and a filter is further arranged between the gear pump and the oil tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121264025.4U CN214838782U (en) | 2021-06-07 | 2021-06-07 | Electro-hydraulic actuator capable of detecting and replacing electromagnetic valve on line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121264025.4U CN214838782U (en) | 2021-06-07 | 2021-06-07 | Electro-hydraulic actuator capable of detecting and replacing electromagnetic valve on line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214838782U true CN214838782U (en) | 2021-11-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121264025.4U Active CN214838782U (en) | 2021-06-07 | 2021-06-07 | Electro-hydraulic actuator capable of detecting and replacing electromagnetic valve on line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214838782U (en) |
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2021
- 2021-06-07 CN CN202121264025.4U patent/CN214838782U/en active Active
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