CN210770421U - Flow control valve with servo regulation capacity - Google Patents
Flow control valve with servo regulation capacity Download PDFInfo
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- CN210770421U CN210770421U CN201921319329.9U CN201921319329U CN210770421U CN 210770421 U CN210770421 U CN 210770421U CN 201921319329 U CN201921319329 U CN 201921319329U CN 210770421 U CN210770421 U CN 210770421U
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Abstract
The utility model provides a flow control valve with servo regulation capacity, which comprises a valve sleeve, a valve center core, a valve cover and a valve cover plate which are arranged in sequence, wherein cavities in the middle parts of the above parts jointly form a cavity for installing a valve core and a control element thereof; one side of the free end of the valve sleeve is provided with a liquid inlet along the radial direction and a liquid outlet along the axial direction; in addition, the valve also comprises a valve core and a valve rod which penetrates through the valve sleeve, the valve middle core and the inner cavity of the valve cover and is provided with a sliding part connected with the valve core; the inner adjusting rod is matched with the valve rod to realize the opening and closing of the valve core and the position balance; the adjusting screw is used for adjusting the relative position of the inner adjusting rod and the valve rod in the axial direction; and a spring for controlling the valve core to reset is arranged between the valve cover and the valve core. The utility model discloses the control valve structural design who provides is ingenious, through adjusting screw's effective regulation, and the case is along with position variation and servo action between valve rod and the interior regulation pole, and the reliability is high, and the nature controlled is good, easily realizes the stable control action.
Description
Technical Field
The invention belongs to the technical field of hydraulic control, and particularly relates to a flow control valve with servo regulation capacity.
Background
The traditional cartridge valve is adopted as a flow control valve, and the flow is controlled by limiting the position of a valve core of the cartridge valve by adopting an adjusting screw rod with a sliding seal. Because the pressure in the cartridge valve is high, the force acting on the adjusting screw is also large, and the adjustment can be completed only by large force under the condition of pressure, so that the flow can not be adjusted in time easily, and the electric adjustment by a motor and other devices can not be realized easily, and the improvement of the existing cartridge valve is needed urgently.
Disclosure of Invention
In view of this, the present invention provides a flow control valve with servo regulation capability, which can greatly reduce the acting force required for flow regulation.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a flow control valve with servo regulation capacity comprises a valve sleeve, a valve center core, a valve cover and a valve cover plate which are sequentially arranged, wherein cavities in the middle of the components form a cavity for installing the valve core and a control element of the valve core;
one side of the free end of the valve sleeve is provided with a liquid inlet along the radial direction and a liquid outlet along the axial direction; also comprises
The valve core is arranged in the valve sleeve in an axial sliding mode, and a fixed throttling hole is formed in the valve core and corresponds to the liquid inlet;
the valve rod penetrates through the valve sleeve, the valve center core and the inner cavity of the valve cover and is in sliding fit with the valve core;
the inner adjusting rod is in sliding fit with the inner hole of the valve rod to realize the opening and closing of the valve core and the position balance;
the adjusting screw is used for adjusting the relative position of the inner adjusting rod and the valve rod in the axial direction;
a spring for controlling the valve core to reset is arranged between the valve cover and the valve core;
the valve rod is of a hollow structure, liquid passing holes are respectively formed in the valve rod and the valve sleeve corresponding to the inner cavity of the valve sleeve and the inner cavity of the valve center core, and a first liquid passing cavity is formed among the valve sleeve, the valve center core and the valve rod;
an annular groove is formed in the part, matched with the valve cover, of the valve rod, a second liquid passing cavity is formed between the annular groove and the inner wall of the valve cover, and an oil return hole communicated with an inner cavity of the annular groove is formed in the motion stroke of the valve rod; and an oil return channel communicated with the second liquid passing cavity is arranged on the valve cover, and the oil return channel passes through a control valve which controls the communication and disconnection of the oil return channel and the oil tank.
Furthermore, an inner adjusting rod which is used for being in sliding fit with an inner hole of the valve rod is arranged in the cavity of the valve cover, the relative position between the inner adjusting rod and the valve rod is adjusted to control the on-off of the oil return hole and the size of the oil return quantity, and the other end of the inner adjusting rod penetrates through the valve end cover in a sliding seal fit mode and is connected with the adjusting screw rod.
Further, be equipped with the valve end cover between valve gap apron and the valve gap, adjusting screw revolves soon in the valve gap apron along the axial, interior regulation pole passes valve end cover and adjusting screw lock joint with sliding seal cooperation.
Further, a sealing element is arranged between the valve end cover and the valve cover.
Furthermore, the outer wall of the valve core and the outer wall of the valve sleeve are both provided with sealing rings.
Furthermore, the valve cover plate, the valve cover, the valve center core and the valve sleeve are fixedly connected.
Furthermore, a liquid inlet channel is arranged in the center of the inner adjusting rod, and a liquid passing channel communicated with the liquid inlet channel is arranged on the inner adjusting rod corresponding to the position between the valve rod and the valve end cover.
Compared with the prior art, the invention has the following advantages:
the adjusting screw rod is not in rigid contact with a valve core of the cartridge valve directly like a flow adjusting screw rod of the common cartridge valve, but is inserted into an inner hole of a hollow valve rod through an inner adjusting rod to seal an oil hole of the hollow valve rod, so that the adjusting screw rod is in flexible contact without impact, the adjusting rod with smaller diameter can be used, the thrust of a high-pressure inner adjusting rod in the valve core is reduced, meanwhile, the pressure in the valve core is reduced under the partial pressure action of a variable throttling liquid resistance formed by the inner adjusting rod and an oil return hole of the valve rod and a fixed liquid resistance formed by a throttling hole in the valve core, and the thrust of an oil pressure inner adjusting rod in the valve core is also reduced, so that the opening position of the valve. The position of the inner adjusting rod changes, and then the position of the valve rod changes along with the position of the inner adjusting rod, so that the servo follow-up function is realized. When the oil return control valve externally connected with the valve cover closes and cuts off the oil return channel, the throttling liquid resistance partial pressure in the valve core disappears to reach the maximum pressure, so that the valve core is immediately closed, and the leakage which possibly occurs when the regulating valve does not work is prevented.
Drawings
The accompanying drawings, which 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 without limitation. In the drawings:
FIG. 1 is a schematic structural diagram of the present invention;
fig. 2 is an enlarged view of the structure at a in fig. 1.
Detailed Description
It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings, which are merely for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.
In the description of the invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "connected" are to be construed broadly, e.g. as being fixed or detachable or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.
The invention will be described in detail with reference to the following embodiments with reference to the attached drawings.
A flow control valve with servo regulation capacity is shown in figures 1 and 2 and comprises a valve sleeve 1, a valve core 2, a valve cover 3 and a valve cover plate 4 which are sequentially arranged, wherein cavities in the middle parts of the components form a cavity for installing the valve core and control elements of the valve core; one side of the free end of the valve sleeve is provided with a liquid inlet 6 along the radial direction and a liquid outlet 7 along the axial direction; also comprises
The valve core 8 is arranged in the valve sleeve in an axial sliding mode, and a fixed throttling hole 9 is formed in the valve core and corresponds to the liquid inlet;
a valve rod 10 connected with the valve core is arranged through the valve sleeve, the valve center core and the inner cavity of the valve cover in a sliding fit manner;
the inner adjusting rod 11 is in sliding fit with the inner hole of the valve rod to realize the opening and closing of the valve core and the position balance;
the adjusting screw 12 is used for adjusting the relative position of the inner adjusting rod and the valve rod in the axial direction;
a spring 13 for controlling the valve core to reset is arranged between the valve cover and the valve core;
the valve rod is of a hollow structure, liquid passing holes 14 are respectively formed in the valve rod and the valve sleeve corresponding to the inner cavity of the valve sleeve and the inner cavity of the valve center core, and a first liquid passing cavity is formed among the valve sleeve, the valve center core and the valve rod;
an annular groove 15 is formed in the part, in sliding fit with the valve cover, of the valve rod, a second liquid passing cavity is formed between the annular groove and the inner wall of the valve cover, and an oil return hole 16 communicated with an inner cavity of the annular groove is formed in the motion stroke of the valve rod; and an oil return channel 17 communicated with the second liquid passing cavity is arranged on the valve cover, and the oil return channel passes through a control valve which controls the communication and disconnection of the oil return channel and the oil tank.
An inner adjusting rod 11 is arranged in a cavity of the valve cover, the piston end of the inner adjusting rod 11 is in sliding fit with an inner hole of the valve rod 10, the relative position between the piston end surface of the inner adjusting rod 11 and an oil return hole 16 of the valve rod 10 is adjusted to control the on-off of the oil return hole and the size of oil return quantity, and the guide end of the inner adjusting rod 11 penetrates through the valve end cover in a sliding seal fit mode and is connected with an adjusting screw rod.
A valve end cover 18 is arranged between the valve cover plate and the valve cover, the adjusting screw rod is screwed on the valve cover plate along the axial direction, and the inner adjusting rod penetrates through the valve end cover in a sliding sealing fit mode to be connected with the screw rod.
And a sealing element 19 is arranged between the valve end cover and the valve cover. The outer wall of the valve core and the outer wall of the valve sleeve are both provided with a sealing ring 20. Generally, the cover plate of the valve cover, the valve core and the valve sleeve are fixedly connected.
The middle part of the inner adjusting rod is provided with a liquid inlet channel 21, and a liquid passing channel 22 communicated with the liquid inlet channel is arranged on the inner adjusting rod corresponding to the position between the valve rod and the valve end cover. The position of the inner adjusting rod corresponding to the liquid passing channel is provided with an annular groove 5, pressure oil is guided into the rear cavity of the piston of the inner adjusting rod, the area difference between the piston end and the guide end of the inner adjusting rod is balanced, and the thrust of the oil pressure on the inner adjusting rod is reduced.
The working principle is as follows: as shown in fig. 1 and 2, pressure oil enters from the port B, when the electromagnetic valve is powered, the electromagnetic valve is switched to open the control valve, and oil in the cavity C of the valve core returns to the oil tank through the oil return hole of the valve rod, the throttle hole formed by the end face of the piston of the inner adjusting rod 11 and the control valve. At this moment, the pressure oil of the port B enters a cavity C of the valve core through the throttle hole with the fixed aperture of the valve core, the pressure of the cavity C is determined by the throttle holes formed by the throttle hole, the valve rod and the adjusting rod, and the flow passing through the two throttle holes is equal, namely:
in the formula: s1-area of fixed bore orifice;
S2-the area of the variable area orifice formed by the valve stem and the regulating stem;
when the thrust of the pressure oil to the cavity B is larger than the thrust formed by the pressure of the cavity C, the valve core is pushed away, namely:
PBB>PCC
the working state is described as follows:
1. when the regulating rod is regulated to a certain position, the electromagnetic valve is electrified to change the direction, the cartridge valve is opened to enable oil in the C cavity to return to the oil tank, the throttle hole formed by the valve rod and the regulating rod is in an open state, the C cavity is directly communicated with the oil tank, the pressure is equal to zero, the thrust of the B cavity is maximum according to the formula, the valve core drives the valve rod to rapidly move leftwards to open the valve core, the pressure oil flows to the A port, when the hole of the valve rod is close to the piston end face of the inner regulating rod, the inner regulating rod blocks part of the area of the oil return hole of the valve rodBB＝PCAnd C, the balance is kept, and the position and the opening distance of the valve core are accurately controlled by the position of the inner adjusting rod, so that the flow quantity flowing to the port A from the port B is controlled.
2. When the inner adjusting rod is adjusted rightwards, the inner adjusting rod blocks the hole of the valve rod, and pressure oil flowing into the C cavity of the valve core from the port B through the throttling port enables the pressure of the C cavity of the valve core to rise rapidly to enable PBB<PCC, the valve core drives the valve rod to move rightwards until the valve rod and the adjusting rod form a throttling hole for draining oil to enable PBB＝PCAnd C, keeping the valve core stressed in balance.
3. When the inner adjusting rod is adjusted leftwards, the principle that the valve core drives the valve rod is the same as the process 1.
4. When the electromagnetic valve is reset after power failure, the control valve is closed, oil in the cavity C of the valve core cannot return to the oil tank, so that the pressure of the cavity C is rapidly increased until the pressure is equal to that of the port B, the valve core is closed, and the communication between the port B and the port A is cut off.
The adjusting screw rod is not in rigid contact with a valve core of the cartridge valve directly like a flow adjusting screw rod of the common cartridge valve, but is inserted into an inner hole of a hollow valve rod through an inner adjusting rod to seal an oil return hole of the hollow valve rod, so that the adjusting screw rod is in flexible contact without impact, the adjusting rod with a smaller diameter can be used, the thrust of a high-pressure inner adjusting rod in the valve core is reduced, meanwhile, the pressure in the valve core is reduced due to the partial pressure action of a variable throttling liquid resistance formed by the inner adjusting rod and the oil return hole of the valve rod and a fixed liquid resistance formed by a throttling port on the valve core, and the thrust of an oil pressure inner adjusting rod in the valve core is also reduced, so that the opening position of. The position of the inner adjusting rod changes, and then the position of the valve rod changes along with the position of the inner adjusting rod, so that the servo follow-up function is realized. When the oil return control valve externally connected with the valve cover closes and cuts off the oil return channel, the throttling liquid resistance partial pressure in the valve core disappears to reach the maximum pressure, so that the valve core is immediately closed, and the leakage which possibly occurs when the regulating valve does not work is prevented.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the invention, so that any modifications, equivalents, improvements and the like, which are within the spirit and principle of the present invention, should be included in the scope of the present invention.
Claims (7)
1. A flow control valve with servo regulation capacity comprises a valve sleeve, a valve center core, a valve cover and a valve cover plate which are sequentially arranged, wherein cavities in the middle of the components form a cavity for installing the valve core and a control element of the valve core; the method is characterized in that:
one side of the free end of the valve sleeve is provided with a liquid inlet along the radial direction and a liquid outlet along the axial direction; also comprises
The valve core is arranged in the valve sleeve in an axial sliding mode, and a fixed throttling hole is formed in the valve core and corresponds to the liquid inlet;
the valve rod penetrates through the valve sleeve, the valve center core and the inner cavity of the valve cover and is in sliding fit with the valve core;
the inner adjusting rod is in sliding fit with the inner hole of the valve rod to realize the opening and closing of the valve core and the position balance;
the adjusting screw is used for adjusting the relative position of the inner adjusting rod and the valve rod in the axial direction;
a spring for controlling the valve core to reset is arranged between the valve cover and the valve core;
the valve rod is of a hollow structure, liquid passing holes are respectively formed in the valve rod and the valve sleeve corresponding to the inner cavity of the valve sleeve and the inner cavity of the valve center core, and a first liquid passing cavity is formed among the valve sleeve, the valve center core and the valve rod;
an annular groove is formed in the part, matched with the valve cover, of the valve rod, a second liquid passing cavity is formed between the annular groove and the inner wall of the valve cover, and an oil return hole communicated with an inner cavity of the annular groove is formed in the motion stroke of the valve rod; and an oil return channel communicated with the second liquid passing cavity is arranged on the valve cover, and the oil return channel passes through a control valve which controls the communication and disconnection of the oil return channel and the oil tank.
2. A flow control valve with servo regulation capability as claimed in claim 1 wherein: an inner adjusting rod which is used for being in sliding fit with an inner hole of the valve rod is arranged in a cavity of the valve cover, the relative position between the inner adjusting rod and the valve rod is adjusted to control the on-off of the oil return hole and the size of the oil return quantity, and the other end of the inner adjusting rod penetrates through the valve end cover in a sliding sealing fit mode and is connected with an adjusting screw rod.
3. A flow control valve with servo regulation capability as claimed in claim 2 wherein: the valve cover is arranged between the valve cover plate and the valve cover, the adjusting screw rod is screwed on the valve cover plate along the axial direction, and the inner adjusting rod penetrates through the valve cover plate in sliding sealing fit and is fastened with the adjusting screw rod.
4. A flow control valve with servo regulation capability as claimed in claim 3 wherein: and a sealing element is arranged between the valve end cover and the valve cover.
5. A flow control valve with servo regulation capability as claimed in claim 1 wherein: and sealing rings are arranged on the outer wall of the valve core and the outer wall of the valve sleeve.
6. A flow control valve with servo regulation capability as claimed in claim 1 wherein: the valve cover plate, the valve cover, the valve center core and the valve sleeve are fixedly connected.
7. A flow control valve with servo regulation capability as claimed in claim 1 wherein: the center of the inner adjusting rod is provided with a liquid inlet channel, and a liquid passing channel communicated with the liquid inlet channel is arranged on the inner adjusting rod corresponding to the position between the valve rod and the valve end cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921319329.9U CN210770421U (en) | 2019-08-15 | 2019-08-15 | Flow control valve with servo regulation capacity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921319329.9U CN210770421U (en) | 2019-08-15 | 2019-08-15 | Flow control valve with servo regulation capacity |
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| Publication Number | Publication Date |
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| CN210770421U true CN210770421U (en) | 2020-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921319329.9U Active CN210770421U (en) | 2019-08-15 | 2019-08-15 | Flow control valve with servo regulation capacity |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112432783A (en) * | 2020-10-20 | 2021-03-02 | 无锡恒捷磁感技术有限公司 | Oil return valve flow measuring method |
| CN115405713A (en) * | 2022-09-05 | 2022-11-29 | 凡尔智能科技集团有限公司 | High-pressure water-oil dual-purpose servo valve with high precision and arbitrary opening degree |
-
2019
- 2019-08-15 CN CN201921319329.9U patent/CN210770421U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112432783A (en) * | 2020-10-20 | 2021-03-02 | 无锡恒捷磁感技术有限公司 | Oil return valve flow measuring method |
| CN115405713A (en) * | 2022-09-05 | 2022-11-29 | 凡尔智能科技集团有限公司 | High-pressure water-oil dual-purpose servo valve with high precision and arbitrary opening degree |
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Effective date of registration: 20230116 Address after: 114201 Xiaojia Village, Tiexi Development Zone, Haicheng City, Anshan City, Liaoning Province Patentee after: Liaoning Tianhai Tiancheng Equipment Manufacturing Co.,Ltd. Address before: 114200 Xiaojia Committee of Haicheng Economic Development Zone, Anshan City, Liaoning Province Patentee before: Liaoning Kaiwen Zhongxin Equipment Manufacturing Co.,Ltd. |