CN213393787U - Electro-hydraulic servo control valve with oil source - Google Patents
Electro-hydraulic servo control valve with oil source Download PDFInfo
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- CN213393787U CN213393787U CN202022383679.0U CN202022383679U CN213393787U CN 213393787 U CN213393787 U CN 213393787U CN 202022383679 U CN202022383679 U CN 202022383679U CN 213393787 U CN213393787 U CN 213393787U
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Abstract
The utility model discloses an electrohydraulic servo control valve with an oil source, which relates to the technical field of valves and comprises a valve and is characterized in that the electrohydraulic servo control valve also comprises a power module, a hydraulic control module, an oil tank and an oil way, wherein the power module comprises a power oil cylinder and a piston rod which are assembled, and the power module is connected with the valve and used for providing driving force for the opening and closing of the valve; the hydraulic control module is communicated with the power oil cylinder and is used for controlling the movement of a piston rod arranged in the power oil cylinder; the oil tank is communicated with the power module and the hydraulic control module through an oil way and is used for providing an oil source for the whole electro-hydraulic servo control valve.
Description
Technical Field
The utility model belongs to the technical field of the valve, further relate to an electro-hydraulic servo control valve from area oil source.
Background
The electro-hydraulic servo valve is a key element in electro-hydraulic servo control, and is a hydraulic control valve which correspondingly outputs modulated flow and pressure after receiving an analog electric signal. In China, key components and supporting equipment related to pressure and flow control basically depend on import. The existing flow pressure and flow control device can be used for realizing the pressure and flow control of liquid or gas, but the regulation function is single, and the functions such as regulation, flow guide, quick closing and the like can only be realized independently.
When multifunctional control is needed, most of the structures adopted in China at present are controlled by using a servo valve, and the functions of opening, closing, quick closing, adjusting, position keeping and the like of the valve are realized through an external oil source type electro-hydraulic (servo) system. However, such valve control systems are bulky, difficult to maintain and costly.
SUMMERY OF THE UTILITY MODEL
In order to realize a multifunctional control valve, the conventional domestic electro-hydraulic servo system mainly adopts external hydraulic oil to control the whole system by a servo valve, but the servo valve needs higher oil source cleanliness and needs to be provided with an oil filter, an air filter and the like to avoid jamming of the servo valve. The external oil source type electro-hydraulic servo system is in open circulation, the oil source is easy to age and oxidize, and frequent filtering and regular replacement of an oil filtering filter core are required. In addition, the system integrates a plurality of elements, has a complex structure and is connected through pipelines, and has a plurality of fault points and leakage points.
Therefore, in view of the above problems, it is urgently needed to provide an electro-hydraulic servo system with integrated structure, which has no contact between an oil source and the outside, basically no maintenance, simple structure, and no external oil source and pipeline. Therefore, the utility model provides a from electricity liquid servo control valve who takes oil supply.
To the above problem, the utility model provides a pair of from electro-hydraulic servo control valve of taking oil supply is with following technical essential solution problem:
the electro-hydraulic servo control valve with the oil source comprises a valve and is characterized by further comprising a power module, a hydraulic control module, an oil tank and an oil way, wherein the power module comprises a power oil cylinder and a piston rod which are assembled, and the power module is connected with the valve and used for providing driving force for opening and closing the valve; the hydraulic control module is communicated with the power oil cylinder and is used for controlling the movement of a piston rod arranged in the power oil cylinder; the oil tank is communicated with the power module and the hydraulic control module through an oil way and is used for providing an oil source for the whole electro-hydraulic servo control valve.
As mentioned above, in this technical scheme, be provided with power module, hydraulic control module, oil tank and oil circuit, compare with prior art, this scheme is provided with the oil tank that provides the oil source for whole electricity liquid servo control valve. In the scheme, the oil source is integrated in the whole control valve, is not in contact with the outside, basically has no maintenance and has a simple structure. Meanwhile, the control valve is also provided with a power module and a hydraulic control module for controlling the power module. The hydraulic control module drives a valve connected with the piston rod through controlling the piston rod in the power module to control various different functional states such as opening, closing, position protection, quick closing and the like of the valve.
The hydraulic control module comprises an energy accumulator system, a hydraulic servo motor, a first electromagnetic valve, a third stop valve, a second electromagnetic valve and a fourth stop valve, the energy accumulator system is communicated with the door closing cavity through an oil way and is communicated with an oil tank through the oil way, and the energy accumulator system is used for realizing the quick closing of the control valve; a door closing oil way is connected between the hydraulic servo motor and the door closing cavity, a door opening oil way is arranged between the hydraulic servo motor and the door opening cavity, a fifth oil way is arranged between the hydraulic servo motor and the oil tank, and the hydraulic servo motor is used for adjusting the oil quantity between the door opening cavity and the door closing cavity; the first electromagnetic valve and the third stop valve are arranged on a first oil path of which the closing cavity is communicated with the oil tank and are used for controlling the on-off of the first oil path; and the second electromagnetic valve and the fourth stop valve are arranged on a second oil path communicated with the oil tank from the opening cavity and are used for controlling the on-off of the second oil path. The technical characteristics specifically describe the structure in the hydraulic control module, and the motion state of a piston rod arranged in a power cylinder is changed by adjusting the oil amount in a door-closing cavity and a door-opening cavity, so that the motion states of opening and closing of a valve and the like are controlled. When the solenoid valve is jammed or damaged and needs to be disassembled, the third stop valve and the fourth stop valve are closed, and oil in the oil tank can be prevented from leaking. Normally in a fully open state.
The energy accumulator system comprises an energy accumulator and an energy accumulator power unit, wherein the energy accumulator is communicated with the first oil way by arranging a third oil way and is communicated with the second oil way by arranging a fourth oil way; the energy accumulator power unit is arranged on the first oil path and used for supplementing oil to the energy accumulator. The technical characteristics ensure that the energy accumulator power unit arranged on the first oil way can supplement oil in the oil tank connected with the first oil way into the energy accumulator through the first oil way and the third oil way, and the oil in the energy accumulator can be discharged into the oil tank through the fourth oil way and the second oil way.
The energy accumulator system further comprises a pressure meter and a pressure switch which are used for controlling the oil quantity in the energy accumulator, and a filter is arranged on an oil path between the energy accumulator power unit and the energy accumulator. In the technical characteristic, a second stop valve is arranged on a third oil way communicated with the first oil way, because the energy accumulator power unit supplies oil to the energy accumulator through the first oil way and the third oil way, when the energy accumulator works, the oil is injected into a closing cavity through the third oil way and the first oil way, the second stop valve is kept in a normally open state, and the second stop valve is used for isolating the energy accumulator; the first stop valve is provided for releasing the pressure in the accumulator when the accumulator is overhauled, and is kept in a normally closed state. The pressure gauge arranged in the energy accumulator system can display the pressure in the energy accumulator in real time, the pressure switch is used for sending a signal to inform the energy accumulator power unit to start or stop, and the pressure gauge, the pressure switch and the energy accumulator power unit together complete the energy charging operation of the energy accumulator. The oil filter is arranged to ensure that the hydraulic control system is not polluted and the hydraulic valve is not jammed, so that the actuating mechanism is ensured to work reliably. The operating and maintenance personnel need to clean and replace the filter element in time. The recommended cleaning period is not more than three months, the replacement period is not more than half a year, and necessary adjustment can be carried out on site according to the situation.
Specifically, the accumulator charging operation is: the energy accumulator power unit supplies oil to the energy accumulator through the filter and the second stop valve, and the upper limit and the lower limit of the working pressure of the energy accumulator are set by the pressure switch. When the pressure of the energy accumulator is lower than the lowest specified working pressure of 14-15 Mpa due to the reasons of motion of the power module or internal leakage and the like, the pressure switch sends a signal to inform the energy accumulator of starting a power unit and charge the energy accumulator; when the accumulator pressure reaches the highest specified working pressure, typically 17Mpa, the pressure switch signals the accumulator to stop the pump. Through the control, enough pressure potential energy is continuously kept in the energy accumulator, so that the valve can be driven to complete the quick closing action when the quick closing command is received at any time.
And a liquid level meter and a ventilation meter are arranged in the oil tank. In this technical feature, a level gauge is provided in the tank for detecting the level of oil in the tank, ensuring that the level of oil is within the working range.
The valve comprises a valve body and a valve rod arranged in the valve body, wherein the top of the valve rod is provided with a connecting clamp plate connected with a power module, and the connecting clamp plate is provided with a scale, an indicating block matched with the scale and a displacement sensor. In the technical characteristic, the arrangement of the connecting clamping plate enables a piston rod in the power module to firmly and stably drive a valve rod arranged in the valve body to synchronously move. The arrangement of the scale, the indication block matched with the scale and the displacement sensor can enable an operator to timely and intuitively know the real-time opening and closing state of the valve.
The electro-hydraulic servo control valve can realize the functions of opening, closing, adjusting, position protection and the like of the valve. The operation for realizing specific functions is as follows:
opening a valve: the first electromagnetic valve and the second electromagnetic valve are in a power-off state, and the first oil way and the second oil way are disconnected. The servo motor power unit receives an external valve opening signal and drives hydraulic oil to move from the door closing cavity to the door opening cavity through the door closing oil way and the door opening oil way, and a piston rod in the power oil cylinder moves from the door opening cavity to the door closing cavity to drive the valve to open.
Closing a valve: the first electromagnetic valve and the second electromagnetic valve are in a power-off state, and the first oil way and the second oil way are disconnected. The servo motor power unit receives an external valve opening signal and drives hydraulic oil to move from the door opening cavity to the door closing cavity through the door opening oil way and the door closing oil way, and a piston rod in the power oil cylinder moves from the door opening cavity to drive the valve to close.
Valve regulation: the first electromagnetic valve and the second electromagnetic valve are in a power-off state, and the first oil way and the second oil way are disconnected. The servo motor power unit receives an external valve opening or closing signal to move a piston rod in the power cylinder, and the working principle of the servo motor power unit is the same as that of valve opening and closing, so that the function of adjusting the valve is achieved.
And (3) quickly closing a valve: the second electromagnetic valve is electrified for reversing, high-pressure oil in the energy accumulator enters the closing door cavity through the third oil way and the first oil way, the oil in the opening door cavity is quickly discharged back to the oil tank through the second oil way, and a piston rod in the power oil cylinder moves quickly to drive the valve to be closed quickly.
And (3) valve position keeping: the first electromagnetic valve and the second electromagnetic valve respectively control the first oil way and the second oil way where the first electromagnetic valve and the second electromagnetic valve are located to be disconnected, and the position of a piston rod in the power cylinder is fixed, so that the reliability and the stability of the closed valve are guaranteed.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model has the advantages of being scientific and reasonable in structure, convenience safe in utilization. The electro-hydraulic servo control valve with the oil source is integrated in the whole control valve, does not contact with the outside, basically has no maintenance and is simple in structure. Meanwhile, the control valve is also provided with a power module and a hydraulic control module for controlling the power module. The hydraulic control module drives a valve connected with the piston rod through controlling the piston rod in the power module to control various different functional states such as opening, closing, position protection, quick closing and the like of the valve. The hydraulic control module comprises an energy accumulator system and a hydraulic servo motor, the energy accumulator system is used for realizing the quick closing of the control valve, and the hydraulic servo motor is used for realizing the opening, closing, adjusting and position keeping of the valve.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a schematic diagram of the oil circuit of the present invention;
fig. 2 is a schematic structural diagram of the present invention.
In the figure: 1. a valve; 101. a valve body; 102. a valve stem; 2. an oil tank; 201. a first oil passage; 202. a second oil passage; 203. a third oil passage; 204. a fourth oil passage; 205. a door opening oil way; 206. a door closing oil path; 207. a fifth oil passage; 208. a liquid level meter; 209. a ventilation meter; 3. a power module; 301. a power cylinder; 302. a piston rod; 303. closing the door cavity; 304. opening a door cavity; 305. a piston ring; 4. a hydraulic control module; 401. an accumulator; 402. an accumulator power unit; 403. a hydraulic servo motor; 404. a first solenoid valve; 405. a third stop valve; 406. a second solenoid valve; 407. a fourth stop valve; 408. a first shut-off valve; 409. a second stop valve; 410. a pressure gauge; 411. a pressure switch; 412. a filter; 5. connecting the clamping plates; 501. a scale; 502. an indication block; 503. and a displacement sensor.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the protection scope of the present invention based on the embodiments of the present invention.
Referring to the drawings, the utility model provides a technical scheme:
the electro-hydraulic servo control valve with the oil source comprises a valve 1 and is characterized by further comprising a power module 3, a hydraulic control module 4, an oil tank 2 and an oil way, wherein the power module 3 comprises a power oil cylinder 301 and a piston rod 302 which are assembled, and the power module 3 is connected with the valve 1 and used for providing driving force for opening and closing the valve 1; the hydraulic control module 4 is communicated with the power cylinder 301 and is used for controlling the movement of a piston rod 302 arranged in the power cylinder 301; the oil tank 2 is communicated with the power module 3 and the hydraulic control module 4 through an oil way, and the oil tank 2 is used for providing an oil source for the whole electro-hydraulic servo control valve.
As mentioned above, in this technical scheme, be provided with power module 3, hydraulic control module 4, oil tank 2 and oil circuit, compare with prior art, this scheme is provided with the oil tank 2 that provides the oil source for whole electricity liquid servo control valve. In the scheme, the oil source is integrated in the whole control valve, is not in contact with the outside, basically has no maintenance and has a simple structure. Meanwhile, the control valve is also provided with a power module 3 and a hydraulic control module 4 for controlling the power module 3. The hydraulic control module 4 drives the valve 1 connected with the piston rod 302 by controlling the piston rod 302 in the power module 3 to control the valve 1 to be opened, closed, position-keeping, quick-closing and other different functional states.
The power oil cylinder 301 is divided into a door closing cavity 303 and a door opening cavity 304 by a piston ring 305 arranged on a piston rod 302, the hydraulic control module 4 comprises an energy accumulator 401 system, a hydraulic servo motor 403, a first electromagnetic valve 404, a third stop valve 405, a second electromagnetic valve 406 and a fourth stop valve 407, the energy accumulator 401 system is communicated with the door closing cavity 303 through an oil path and is communicated with the oil tank 2 through an oil path, and the energy accumulator 401 system is used for realizing the quick closing of the control valve 1; a door closing oil path 206 is connected between the hydraulic servo motor 403 and the door closing cavity 303, a door opening oil path 205 is arranged between the hydraulic servo motor 403 and the door opening cavity 304, a fifth oil path 207 is arranged between the hydraulic servo motor 403 and the oil tank 2, and the hydraulic servo motor 403 is used for adjusting the oil amount between the door opening cavity 304 and the door closing cavity 303; the first electromagnetic valve 404 and the third stop valve 405 are arranged on the first oil path 201 of the door closing cavity 303 communicated with the oil tank 2 and are used for controlling the connection and disconnection of the first oil path 201; and a second electromagnetic valve 406 and a fourth shutoff valve 407, which are provided in the second oil passage 202 in which the open door chamber 304 communicates with the oil tank 2, and which control opening and closing of the second oil passage 202. The technical characteristics specifically describe the structure in the hydraulic control module 4, and the movement state of the piston rod 302 arranged in the power cylinder 301 is changed by adjusting the oil amount in the door-closing cavity 303 and the door-opening cavity 304, so as to control the movement states of the valve 1, such as opening and closing. When the solenoid valve is jammed or damaged and needs to be disassembled, the third stop valve 405 and the fourth stop valve 407 are closed, and oil in the oil tank 2 can be prevented from leaking. Normally in a fully open state.
The energy accumulator 401 system comprises an energy accumulator 401 and an energy accumulator power unit 402, wherein the energy accumulator 401 is communicated with the first oil way 201 through a third oil way 203 and communicated with the second oil way 202 through a fourth oil way 204; the accumulator power unit 402 is arranged on the first oil path 201, and the accumulator power unit 402 is used for supplementing oil to the accumulator 401. This technical feature ensures that the accumulator power unit 402 provided on the first oil passage 201 can replenish the oil in the oil tank 2 to which the first oil passage 201 is connected into the accumulator 401 through the first oil passage 201 and the third oil passage 203, and the oil in the accumulator 401 can be drained back into the oil tank 2 through the fourth oil passage 204 to the second oil passage 202.
The third oil path 203 is provided with a second stop valve 409, the fourth oil path 204 is provided with a first stop valve 408, the accumulator 401 system further comprises a pressure gauge 410 and a pressure switch 411 for controlling the oil amount in the accumulator 401, and the oil path between the accumulator power unit 402 and the accumulator 401 is provided with a filter 412. In the technical feature, the second stop valve 409 is arranged on the third oil path 203 communicated with the first oil path 201, because the accumulator power unit 402 supplies oil to the accumulator 401 through the first oil path 201 and the third oil path 203, and the accumulator 401 injects the oil into the closed cavity 303 through the third oil path 203 and the first oil path 201 when working, the second stop valve 409 is kept in a normally open state, and the second stop valve 409 is used for isolating the accumulator 401; the first shut-off valve 408 is provided to release the pressure in the accumulator 401 when the accumulator 401 is to be serviced, and is kept normally closed. The pressure gauge 410 arranged in the energy accumulator 401 system can display the pressure in the energy accumulator 401 in real time, the pressure switch 411 is used for signaling the energy accumulator power unit 402 to start or stop, and the pressure gauge 410, the pressure switch 411 and the energy accumulator power unit 402 together complete the operation of charging the energy accumulator 401. The oil filter is arranged to ensure that the hydraulic control system is not polluted and the hydraulic valve is not jammed, so that the actuating mechanism is ensured to work reliably. The operating and maintenance personnel need to clean and replace the filter element in time. The recommended cleaning period is not more than three months, the replacement period is not more than half a year, and necessary adjustment can be carried out on site according to the situation.
Specifically, the charging operation of the accumulator 401 is: the accumulator power unit 402 supplies oil to the accumulator 401 through a filter 412 and a second stop valve 409, and the upper and lower limits of the working pressure of the accumulator 401 are set by a pressure switch 411. When the pressure of the energy accumulator 401 is lower than the lowest specified working pressure of 14-15 Mpa due to the motion of the power module 3 or internal leakage and the like, the pressure switch 411 sends a signal to inform the energy accumulator power unit 402 to start and charge the energy accumulator 401; when the accumulator 401 pressure reaches the maximum specified working pressure, typically 17Mpa, the pressure switch 411 signals the accumulator power unit 402 to stop pumping. Through the control, enough pressure potential energy is continuously kept in the energy accumulator 401, so that the valve 1 can be driven to complete the quick closing action when the quick closing command is received at any time.
A liquid level meter 208 and a ventilation meter 209 are arranged in the oil tank 2. In this technical feature, a level gauge 208 provided in the oil tank 2 is used to detect the oil level in the oil tank 2, ensuring that the oil level is within the operating range.
The valve 1 comprises a valve body 101 and a valve rod 102 installed in the valve body 101, a connecting clamp plate 5 connected with a power module 3 is arranged at the top of the valve rod 102, and a scale 501, an indicating block 502 matched with the scale 501 and a displacement sensor 503 are arranged on the connecting clamp plate 5. In this technical feature, the connecting clamp plate is arranged to enable the piston rod 302 in the power module 3 to firmly and stably drive the valve rod 102 arranged in the valve body 101 to move synchronously. The arrangement of the scale 501, the indication block 502 matched with the scale 501 and the displacement sensor 503 can enable an operator to timely and intuitively know the real-time opening and closing state of the valve.
The electro-hydraulic servo control valve can realize the functions of opening, closing, adjusting, position protection and the like of the valve 1. The operation for realizing specific functions is as follows:
opening the valve 1: the first solenoid valve 404 and the second solenoid valve 406 are in a power-off state, and the first oil passage 201 and the second oil passage 202 are disconnected. The servo motor power unit receives an external valve opening signal, drives hydraulic oil to move from the door closing cavity 303 to the door opening cavity 304 through the door closing oil path 206 and the door opening oil path 205, and a piston rod 302 in the power oil cylinder 301 moves from the door opening cavity 304 to the door closing cavity 303 to drive the valve 1 to open.
The valve 1 is closed: the first solenoid valve 404 and the second solenoid valve 406 are in a power-off state, and the first oil passage 201 and the second oil passage 202 are disconnected. The servo motor power unit receives an external valve opening signal, drives hydraulic oil to move from the door opening cavity 304 to the door closing cavity 303 through the door opening oil path 205 and the door closing oil path 206, and the piston rod 302 in the power oil cylinder 301 moves from the door closing cavity 303 to the door opening cavity 304 to drive the valve 1 to close.
And (3) adjusting a valve 1: the first solenoid valve 404 and the second solenoid valve 406 are in a power-off state, and the first oil passage 201 and the second oil passage 202 are disconnected. The servo motor power unit receives an external valve opening or closing signal to move a piston rod 302 in the power cylinder 301, and the working principle of the servo motor power unit is the same as that of valve opening and closing, so that the function of adjusting the valve 1 is achieved.
Valve 1 is closed quickly: the second electromagnetic valve 406 is electrically switched, high-pressure oil in the energy accumulator 401 enters the door closing cavity 303 through the third oil path 203 and the first oil path 201, oil in the door opening cavity 304 is quickly discharged back to the oil tank 2 through the second oil path 202, and the piston rod 302 in the power cylinder 301 moves quickly to drive the valve 1 to be quickly closed.
And (3) position keeping of the valve 1: the first electromagnetic valve 404 and the second electromagnetic valve 406 respectively control the first oil path 201 and the second oil path 202 where the first electromagnetic valve and the second electromagnetic valve are located to be disconnected, and the position of the piston rod 302 in the power cylinder 301 is fixed, so that the reliability and the stability of the closed valve 1 are ensured.
The above is the preferred embodiment of the present invention, and the technical personnel in the field of the present invention can also change and modify the above embodiment, therefore, the present invention is not limited to the above specific embodiment, and any obvious improvement, replacement or deformation made by the technical personnel in the field on the basis of the present invention all belong to the protection scope of the present invention.
Claims (6)
1. An electro-hydraulic servo control valve with an oil source comprises a valve (1), and is characterized by further comprising:
the power module (3) comprises a power oil cylinder (301) and a piston rod (302) which are assembled, and the power module (3) is connected with the valve (1) and used for providing driving force for opening and closing the valve (1);
the hydraulic control module (4) is communicated with the power oil cylinder (301) and is used for controlling the movement of a piston rod (302) arranged in the power oil cylinder (301);
the oil tank (2) is communicated with the power module (3) and the hydraulic control module (4) through the oil way, and the oil tank (2) is used for providing an oil source for the whole electro-hydraulic servo control valve.
2. The electrohydraulic servo control valve with an oil source according to claim 1, wherein the power cylinder (301) is divided into a door opening cavity (303) and a door closing cavity (304) by a piston ring (305) arranged on a piston rod (302), and the hydraulic control module (4) comprises:
the energy accumulator system is communicated with the closing valve cavity (303) through an oil way and is communicated with the oil tank (2) through the oil way, and the energy accumulator system is used for realizing the quick closing of the control valve;
the hydraulic servo motor (403), a door closing oil path (206) is connected between the hydraulic servo motor (403) and the door closing cavity (303), a door opening oil path (205) is arranged between the hydraulic servo motor (403) and the door opening cavity (304), a fifth oil path (207) is arranged between the hydraulic servo motor (403) and the oil tank (2), and the hydraulic servo motor (403) is used for adjusting the oil amount between the door opening cavity (304) and the door closing cavity (303);
the first electromagnetic valve (404) and the third stop valve (405) are arranged on a first oil path (201) of the closing cavity (303) communicated with the oil tank (2) and are used for controlling the on/off of the first oil path (201);
and the second electromagnetic valve (406) and the fourth stop valve (407) are arranged on a second oil path (202) where the opening cavity (304) is communicated with the oil tank (2) and used for controlling the on/off of the second oil path (202).
3. The electro-hydraulic servo control valve with the oil source as claimed in claim 2, characterized in that the accumulator system comprises an accumulator (401) and an accumulator power unit (402), wherein the accumulator (401) is communicated with the first oil passage (201) through a third oil passage (203) and is communicated with the second oil passage (202) through a fourth oil passage (204); the energy storage power unit (402) is arranged on the first oil way (201), and the energy storage power unit (402) is used for supplementing oil to the energy storage device (401).
4. The electrohydraulic servo control valve with the oil source as recited in claim 3, wherein a second stop valve (409) is installed on the third oil path (203), a first stop valve (408) is installed on the fourth oil path (204), the accumulator system further comprises a pressure gauge (410) and a pressure switch (411) for controlling the oil amount in the accumulator (401), and a filter (412) is arranged on the oil path between the accumulator power unit (402) and the accumulator (401).
5. Electro-hydraulic servo control valve with its own oil source according to claim 1, characterized in that a level gauge (208) and a breather gauge (209) are provided in the tank (2).
6. The electro-hydraulic servo control valve with the oil source is characterized in that the valve (1) comprises a valve body (101) and a valve rod (102) installed in the valve body (101), a connecting clamp plate (5) connected with a power module (3) is arranged at the top of the valve rod (102), and a scale (501), an indicating block (502) matched with the scale (501) and a displacement sensor (503) are arranged on the connecting clamp plate (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022383679.0U CN213393787U (en) | 2020-10-23 | 2020-10-23 | Electro-hydraulic servo control valve with oil source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022383679.0U CN213393787U (en) | 2020-10-23 | 2020-10-23 | Electro-hydraulic servo control valve with oil source |
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| Publication Number | Publication Date |
|---|---|
| CN213393787U true CN213393787U (en) | 2021-06-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022383679.0U Active CN213393787U (en) | 2020-10-23 | 2020-10-23 | Electro-hydraulic servo control valve with oil source |
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| Country | Link |
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| CN (1) | CN213393787U (en) |
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- 2020-10-23 CN CN202022383679.0U patent/CN213393787U/en active Active
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