CN113236817A - Flow control valve and safety control method - Google Patents
Flow control valve and safety control method Download PDFInfo
- Publication number
- CN113236817A CN113236817A CN202110600233.5A CN202110600233A CN113236817A CN 113236817 A CN113236817 A CN 113236817A CN 202110600233 A CN202110600233 A CN 202110600233A CN 113236817 A CN113236817 A CN 113236817A
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- valve
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- oil duct
- valve core
- oil
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
- F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
- F16K31/047—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor characterised by mechanical means between the motor and the valve, e.g. lost motion means reducing backlash, clutches, brakes or return means
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
Abstract
The invention discloses a flow control valve and a safety control method, wherein the flow control valve comprises a valve sleeve, the valve sleeve is of a cylindrical structure, a cavity is arranged in the valve sleeve for placing a valve core, a protection device is arranged at one end of the valve sleeve in the horizontal direction, the protection device pushes the valve core to the side along the horizontal direction under the elastic action of a spring, so that a safety oil passage is opened, and the system is decompressed; and the other end of the valve sleeve in the horizontal direction is provided with a limiting mechanism, a gap is formed between the limiting mechanism and the valve core, and the limiting mechanism is used for supporting the valve core when the valve core displaces. When power is lost, the safety spring in the flow control valve can push the valve core to one end, the first load oil duct or the second load oil duct on the flow control valve is directly communicated with the oil return duct, and the other load oil duct is communicated with the oil return duct through the safety oil duct, so that two cavities of the system are relieved, the protection effect on the system is achieved, and accidents are avoided.
Description
Technical Field
The invention belongs to the fluid control technology, and relates to a safety control method of a flow control valve, which is mainly applied to a hydraulic servo system.
Background
At present, a rotary direct-drive electro-hydraulic servo valve converts the rotary motion of a motor into the reciprocating motion of a valve core according to an external command signal, and realizes the control of the direction and the flow of fluid. When the servo valve loses power, the output torque of the motor is zero, the valve core loses control, and an object controlled by the servo valve loses control, so that danger is easy to occur, and the system is damaged.
Disclosure of Invention
In order to solve the problems in the background art, the invention aims to provide a flow control valve with a safety protection device, which has a protection effect on a hydraulic system when the flow control valve is powered off.
The technical scheme of the invention is as follows: a flow control valve comprises a valve sleeve, wherein the valve sleeve is of a cylindrical structure, a cavity is arranged in the valve sleeve for placing a valve core, a protection device is arranged at one end of the valve sleeve in the horizontal direction, the protection device pushes the valve core to the side along the horizontal direction under the elastic action of a spring, so that a safety oil duct is opened, and the system is decompressed; and the other end of the valve sleeve in the horizontal direction is provided with a limiting mechanism, a gap is formed between the limiting mechanism and the valve core, and the limiting mechanism is used for supporting the valve core when the valve core displaces.
Furthermore, the protection device comprises a spring seat, a safety spring and a sealing boss arranged at the center of the valve core, a safety oil duct is arranged on the valve sleeve, one end of the safety oil duct is connected with a load oil duct of the control valve, the other end of the safety oil duct is communicated with an oil return duct, and the communication part of the safety oil duct and the oil return duct is covered by the sealing boss; one end of the safety spring is installed on the spring seat, and the other end of the safety spring is in contact with the valve core.
Furthermore, the control valve comprises a valve body, the valve body is arranged in the valve sleeve, and a valve core is arranged inside the valve body; the valve body is provided with an oil supply oil duct, a first load oil duct, an oil return oil duct and a second load oil duct which are communicated with the through groove formed in the valve sleeve to form the integral oil supply oil duct, the first load oil duct, the oil return oil duct and the second load oil duct of the servo valve.
Further, the valve core is placed in the cavity of the valve sleeve, the valve sleeve is provided with a plurality of sealing bosses, wherein the sealing bosses positioned in the middle of the valve core are connected to the safety oil duct, and other sealing bosses are respectively connected to the oil supply duct, the first load oil duct, the oil return duct and the second load oil duct.
Furthermore, the valve core is in a hollow structural form, and a through hole is formed in the valve core and penetrates through two end faces of the valve core, so that the interior of the valve core is communicated with the oil return duct, and the back pressure at two ends of the valve core is reduced when the valve core moves.
Further, the control valve still contains end cover and sealing washer, the end cover passes through the fix with screw on the valve body, and the screw is equipped with the sealing washer with the valve body position of contacting, through the extrusion to the sealing washer on the valve body, realizes sealing the valve body.
The application also provides a safety control method of the flow control valve, which comprises the following processes:
when the servo valve is normally controlled, the sealing boss covers the safety oil duct;
when the servo valve motor is powered off, the control on the valve core is lost, the valve core is pushed to one end by the safety spring, the sealing boss generates displacement along with the valve core, the safety oil duct is opened to communicate the load oil duct with the oil return oil duct, and the system is decompressed.
Furthermore, after the flow control valve is in the safety protection position, rated power electricity is supplied, the control motor enables the flow control valve to operate to the middle position, and the flow control valve is recovered to be normal.
The invention has the beneficial effects that: the flow control valve is internally provided with a safety spring, a spring seat and a limiting seat, and a valve sleeve is provided with a safety flow passage. When the motor is powered off, the safety spring can push the valve core to one end, at the moment, the first load oil duct or the second load oil duct on the flow control valve is directly communicated with the oil return duct, and the other load oil duct is communicated with the oil return duct through the safety oil duct, so that both cavities of the system are relieved, and the system is protected.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the present invention will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without inventive labor.
FIG. 1 is a schematic view of the construction of the flow control valve of the present invention;
the oil-water-saving valve comprises a valve body 1, a valve core 2, a valve sleeve 3, a spring seat 4, a safety spring 5, a limiting seat 6, an end cover 7, a sealing ring 8, a screw 9, a motor pressing plate 10, a motor sealing ring 11, a motor fixing screw 12, a driving motor 13, a controller 14, a controller seat 15, a controller seat cover 16, a controller seat cover screw 17, a controller seat cover screw 18, an oil supply oil channel 19, a first load oil channel 20, a second load oil channel 21, an oil return oil channel 22 and a safety oil channel 23.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The embodiment is a flow control valve, which comprises a valve sleeve, wherein the valve sleeve is of a cylindrical structure, a cavity is arranged in the valve sleeve for placing a valve core, and a protection device is arranged at one end of the valve sleeve in the horizontal direction and pushes the valve core to the side along the horizontal direction under the elastic action of a spring, so that a safety oil duct is opened, and the system is decompressed; and the other end of the valve sleeve in the horizontal direction is provided with a limiting mechanism, a gap is formed between the limiting mechanism and the valve core, and the limiting mechanism is used for supporting the valve core when the valve core displaces.
Furthermore, the protection device comprises a spring seat, a safety spring and a sealing boss arranged at the center of the valve core, a safety oil duct is arranged on the valve sleeve, one end of the safety oil duct is connected with a load oil duct of the control valve, the other end of the safety oil duct is communicated with an oil return duct, and the communication part of the safety oil duct and the oil return duct is covered by the sealing boss; one end of the safety spring is installed on the spring seat, and the other end of the safety spring is in contact with the valve core.
Furthermore, the control valve comprises a valve body, the valve body is arranged in the valve sleeve, and a valve core is arranged inside the valve body; the valve body is provided with an oil supply oil duct, a first load oil duct, an oil return oil duct and a second load oil duct which are communicated with the through groove formed in the valve sleeve to form the integral oil supply oil duct, the first load oil duct, the oil return oil duct and the second load oil duct of the servo valve.
Further, the valve core is placed in the cavity of the valve sleeve, the valve sleeve is provided with a plurality of sealing bosses, wherein the sealing bosses positioned in the middle of the valve core are connected to the safety oil duct, and other sealing bosses are respectively connected to the oil supply duct, the first load oil duct, the oil return duct and the second load oil duct.
Furthermore, the valve core is in a hollow structural form, and a through hole is formed in the valve core and penetrates through two end faces of the valve core, so that the interior of the valve core is communicated with the oil return duct, and the back pressure at two ends of the valve core is reduced when the valve core moves.
Further, the control valve still contains end cover and sealing washer, the end cover passes through the fix with screw on the valve body, and the screw is equipped with the sealing washer with the valve body position of contacting, through the extrusion to the sealing washer on the valve body, realizes sealing the valve body.
Referring to fig. 1, a schematic diagram of a flow control valve is shown. The flow control valve comprises a valve body 1, a valve core 2, a valve sleeve 3, a spring seat 4, a safety spring 5, a limiting seat 6, an end cover 7, a sealing ring 8, a screw 9, a motor pressing plate 10, a motor sealing ring 11, a motor fixing screw 12, a driving motor 13, a controller 14, a controller seat 15, a controller seat cover 16, a controller seat cover screw 17, a controller screw 18, an oil supply oil channel 19, a first load oil channel 20, a second load oil channel 21, an oil return oil channel 22 and a safety oil channel 23. The valve body 1 is of a hollow structure, a cavity for placing the valve sleeve 3 is formed in the valve body 1, and an oil supply passage 19, a first load passage 20, an oil return passage 22 and a second load passage 21 are formed in the valve body 1 and communicated with the cavity. The valve sleeve 3 is arranged in the valve body 1 and is of a cylindrical structure, and a cylindrical cavity is formed in the valve sleeve. The valve sleeve 3 is provided with a plurality of through grooves which are communicated with an oil supply duct 19, a first load oil duct 20, an oil return duct 22 and a second load oil duct 21 on the valve body, and a plurality of sealing bosses play a role in isolating the oil ducts. The center of the valve sleeve 3 is provided with a safety oil passage 23 for communicating the first load oil passage 20 or the second load oil passage 21 and the return oil passage 22 formed by the valve sleeve 3 and the valve body 1. A spring seat 4 and a relief spring 5 are placed in one end of the relief oil passage 23 of the valve housing 3 and the first or second load oil passage 20 or 21. The spring seat 4 is pressed in the valve sleeve 3 through the end cover 7, one end of the safety spring 5 is installed on the spring seat, the other end of the safety spring abuts against the end face of the valve core 2, and a certain pre-compression amount is achieved when the flow control valve is powered on. A limiting seat 6 is arranged in the other end of the valve sleeve 3, one end of the limiting seat 6 is tightly pressed in the valve sleeve 3 through an end cover 7, and a certain distance is reserved between the other end of the limiting seat and the valve core 2. The two ends of the valve body 1 and the valve sleeve 3 are fastened on the valve body 1 through an end cover 7 and a screw 9, and a gap between the valve body 1 and the valve sleeve 3 is sealed through a sealing ring 8.
The valve core 2 is placed in the cavity of the valve sleeve 3, and is provided with a plurality of sealing bosses which can isolate an oil duct in the cavity through the linear motion of the valve core 2. The first and second load oil passages 20, 21 are opened or closed. The center of the valve core 2 is provided with a sealing boss, when the flow control valve is electrified and normally works, the sealing boss can cover the safety oil duct on the valve sleeve 3 to keep the sealing performance, when the flow control valve is not electrified, the valve core 2 is pushed to one end by the safety spring 5, the sealing boss generates certain displacement along with the valve core 2, and at the moment, the safety oil duct 23 originally covered by the sealing boss is opened to communicate the first load oil duct 20 or the second load oil duct 21 with the return oil duct 22, so that the system is decompressed, and the protection effect is achieved.
The valve core 2 is hollow and has a through hole penetrating through the valve core 2 to communicate two end faces thereof, so that the cavities at two ends of the valve core 2 can communicate with the oil return passage 22. The center of the valve core 2 is provided with a connecting port matched with a motor shaft of the driving motor 13, an eccentric ball rod on the motor shaft of the driving motor 13 is inserted into the connecting port in the center of the valve core 2 to be connected with the valve core 2, and is fixed on the valve body 1 through a motor pressing plate 10 and a motor fixing screw 12, and then is sealed by a motor sealing ring 11 to isolate oil. The controller base 15 is mounted at the other end of the drive motor 13 by a controller screw 18. The controller 14 is disposed in the controller base 15 for controlling the driving motor 13. The control seat cover 16 is mounted on the control seat 15 by a control seat cover screw 17 for protecting the control 14.
The oil supply passage 19, the first load passage 20, the oil return passage 22 and the second load passage 21 are formed by the valve body and the valve sleeve together with the related cavities, and the four passages are arranged on the valve sleeve as well as the valve sleeve. The safety oil passage is arranged on the valve sleeve independently. The boss on the valve core plays a role in closing the conduction of different oil ducts by means of the movement of the valve core.
When the motor is powered off, the safety spring can push the valve core to one end, at the moment, the first load oil duct or the second load oil duct on the flow control valve is directly communicated with the oil return duct, and the other load oil duct is communicated with the oil return duct through the safety oil duct, so that both cavities of the system are relieved, and the system is protected.
Example 2
Based on the above, the present application further provides a safety control method of the above flow control valve, where the control method includes the following steps:
when the servo valve is normally controlled, the sealing boss covers the safety oil duct;
when the servo valve motor is powered off, the control on the valve core is lost, the valve core is pushed to one end by the safety spring, the sealing boss generates displacement along with the valve core, the safety oil duct is opened to communicate the load oil duct with the oil return oil duct, and the system is decompressed.
Furthermore, after the flow control valve is in the safety protection position, rated power electricity is supplied, the control motor enables the flow control valve to operate to the middle position, and the flow control valve is recovered to be normal.
The safety oil duct is communicated with a load oil duct and an oil return oil duct (both corresponding to the relevant cavities on the valve sleeve), and at the communication position of the safety oil duct and the oil return oil duct, when the servo valve is in a normal state, the servo valve is covered by a sealing boss on the valve core and is in a sealing state. Only when the servo valve is powered off, the valve core is pushed to one end by the safety spring, and the covering parts of the safety oil duct and the oil return duct are opened, so that a load oil duct is communicated with the oil return duct.
When the safety protection device of the flow control valve works actually, when the flow control valve is powered off and the valve core is in an uncontrolled state, the safety spring in the safety protection device has certain pre-compression amount, so that the valve core can be directly pushed to one end of the limiting seat to reach the limit position of the valve core. At the moment, because the displacement of the valve core exceeds the normal working stroke, the sealing boss at the center of the valve core cannot cover the safety oil duct at the center of the valve body, so that the safety oil duct is communicated with the oil return duct, the pressure of the system is relieved, and the protection effect on the system is achieved.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Furthermore, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include elements inherent in the list. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element. In addition, parts of the above technical solutions provided in the embodiments of the present application, which are consistent with the implementation principles of corresponding technical solutions in the prior art, are not described in detail so as to avoid redundant description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A flow control valve characterized by: the safety oil way valve comprises a valve sleeve (3), wherein the valve sleeve (3) is of a cylindrical structure, a cavity is arranged in the valve sleeve for placing a valve core (2), one end of the valve sleeve (3) in the horizontal direction is provided with a protection device, and the protection device pushes the valve core to the side along the horizontal direction under the elastic action of a spring so as to open a safety oil way and release pressure of a system; the other end of the valve sleeve (3) in the horizontal direction is provided with a limiting mechanism, a gap is arranged between the limiting mechanism and the valve core, and the limiting mechanism is used for supporting the valve core when the valve core is displaced.
2. A flow control valve according to claim 1, wherein: the protection device comprises a spring seat (4), a safety spring (5) and a sealing boss arranged at the center of the valve core (2), a safety oil duct is arranged on the valve sleeve, one end of the safety oil duct is connected with a load oil duct of the control valve, the other end of the safety oil duct is communicated with an oil return duct, and the communication part of the safety oil duct and the oil return duct is covered by the sealing boss;
one end of the safety spring (5) is arranged on the spring seat (4), and the other end of the safety spring is contacted with the valve core (2).
3. A flow control valve according to claim 1, wherein: the control valve comprises a valve body, the valve body is arranged in the valve sleeve (3), and a valve core (2) is arranged in the valve body;
the servo valve is characterized in that an oil supply oil duct (19), a first load oil duct (20), an oil return oil duct (22) and a second load oil duct (21) are arranged on the valve body (1) and communicated with a through groove formed in the valve sleeve (3), and the integral oil supply oil duct (19), the first load oil duct (20), the oil return oil duct (22) and the second load oil duct (21) of the servo valve are formed.
4. A flow control valve according to claim 1, wherein: the valve core (2) is placed in a cavity of the valve sleeve (3), a plurality of sealing bosses are arranged on the valve sleeve (3), wherein the sealing bosses positioned in the middle of the valve core are connected to the safety oil duct, and other sealing bosses are respectively connected to the oil supply duct (19), the first load oil duct (20), the oil return duct (22) and the second load oil duct (21).
5. A flow control valve according to any one of claims 1 to 4, characterised in that: the valve core (2) is in a hollow structural form, a through hole is formed in the valve core and penetrates through two end faces of the valve core, the interior of the valve core is communicated with the oil return duct, and back pressure at two ends of the valve core is reduced when the valve core moves.
6. A flow control valve according to claim 5, wherein: the control valve also comprises an end cover and a sealing ring, the end cover (7) is fixed on the valve body (1) through a screw (9), the sealing ring is arranged at the contact position of the screw and the valve body, and the valve body (1) is sealed through extrusion of the sealing ring (8) on the valve body (1).
7. A safety control method of a flow control valve according to claim 1, characterized in that: the control method comprises the following processes:
when the servo valve is normally controlled, the sealing boss covers the safety oil duct (23);
when the servo valve motor is powered off, the control on the valve core is lost, the valve core (2) is pushed to one end by the safety spring (5), the sealing boss moves along with the valve core (2), the safety oil duct (23) is opened, and the load oil duct and the return oil duct (22) are communicated to release pressure of the system.
8. The safety control method according to claim 7, characterized in that: after the flow control valve is in the safety protection position, rated power electricity is supplied, the control motor enables the flow control valve to operate to the middle position, and at the moment, the flow control valve returns to the normal state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110600233.5A CN113236817B (en) | 2021-05-31 | 2021-05-31 | Flow control valve and safety control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110600233.5A CN113236817B (en) | 2021-05-31 | 2021-05-31 | Flow control valve and safety control method |
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| Publication Number | Publication Date |
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| CN113236817A true CN113236817A (en) | 2021-08-10 |
| CN113236817B CN113236817B (en) | 2023-05-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110600233.5A Active CN113236817B (en) | 2021-05-31 | 2021-05-31 | Flow control valve and safety control method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0914472A (en) * | 1995-06-28 | 1997-01-14 | Tekunopurasu:Kk | Spool type servo valve |
| JPH09257137A (en) * | 1996-03-26 | 1997-09-30 | Commuter Herikoputa Senshin Gijutsu Kenkyusho:Kk | Direct drive type hydraulic servo valve |
| JPH11193871A (en) * | 1997-11-07 | 1999-07-21 | Mitsubishi Electric Corp | Oil control valve |
| CN206555197U (en) * | 2016-08-22 | 2017-10-13 | 江苏二马液压元件有限公司 | A kind of pressure-gradient control valve |
| CN209444871U (en) * | 2018-09-28 | 2019-09-27 | 江苏金陵智造研究院有限公司 | A kind of flow control valve with eccentric stiffener |
| CN215214868U (en) * | 2021-05-31 | 2021-12-17 | 南京晨光集团有限责任公司 | Flow control valve |
-
2021
- 2021-05-31 CN CN202110600233.5A patent/CN113236817B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0914472A (en) * | 1995-06-28 | 1997-01-14 | Tekunopurasu:Kk | Spool type servo valve |
| JPH09257137A (en) * | 1996-03-26 | 1997-09-30 | Commuter Herikoputa Senshin Gijutsu Kenkyusho:Kk | Direct drive type hydraulic servo valve |
| JPH11193871A (en) * | 1997-11-07 | 1999-07-21 | Mitsubishi Electric Corp | Oil control valve |
| CN206555197U (en) * | 2016-08-22 | 2017-10-13 | 江苏二马液压元件有限公司 | A kind of pressure-gradient control valve |
| CN209444871U (en) * | 2018-09-28 | 2019-09-27 | 江苏金陵智造研究院有限公司 | A kind of flow control valve with eccentric stiffener |
| CN215214868U (en) * | 2021-05-31 | 2021-12-17 | 南京晨光集团有限责任公司 | Flow control valve |
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| Publication number | Publication date |
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| CN113236817B (en) | 2023-05-02 |
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