CN112431953B - Self-operated rising stem flow control valve with piston structure - Google Patents
Self-operated rising stem flow control valve with piston structure Download PDFInfo
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- CN112431953B CN112431953B CN202011599089.XA CN202011599089A CN112431953B CN 112431953 B CN112431953 B CN 112431953B CN 202011599089 A CN202011599089 A CN 202011599089A CN 112431953 B CN112431953 B CN 112431953B
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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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/20—Excess-flow valves
- F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
- F16K17/32—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting on a servo-mechanism or on a catch-releasing mechanism
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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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/02—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with screw-spindle
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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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
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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
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0008—Mechanical means
- F16K37/0016—Mechanical means having a graduated scale
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- Mechanical Engineering (AREA)
- Details Of Valves (AREA)
- Fluid-Driven Valves (AREA)
Abstract
The invention discloses a self-operated rising stem flow control valve with a piston structure, which comprises a valve body (1), wherein an inlet cavity (2) is arranged at the inlet of the valve body (1), and an outlet cavity (3) is arranged at the outlet of the valve body (1); the valve body (1) interior middle part is separated for epicoele (4) and lower chamber (5) through being equipped with disk seat (7) back, be equipped with inner chamber (6) in lower chamber (5), inner chamber (6) and advance chamber (2) natural intercommunication, epicoele (4) and play chamber (3) natural intercommunication, inner chamber (6) are through last opening (8) and lower chamber (5) intercommunication at its upper end, lower opening (9) and lower chamber (5) intercommunication of inner chamber (6) through its lower bottom. The invention has reasonable design, realizes the stable control and the tight shutoff of the flow and has better practical application value.
Description
Technical Field
The invention relates to the technical field of control valves, in particular to a self-operated rising stem flow control valve with a piston structure, which is applied to heating equipment.
Background
At present, a plurality of self-operated flow control valves exist in the market, and the self-operated flow control valves need to meet corresponding national standards (GB/T29735-2013). The valve is a control valve which does not need to be driven by external power of a system and can keep stable flow within a working pressure difference range by means of self mechanical action. Meanwhile, the flow scale displayed on the valve can be used for accurately knowing the flow passing through the control valve. Due to the two performance characteristics, the self-operated flow control valve is widely applied to hydraulic balance adjustment of an air conditioner circulating system and a heating circulating system, so that the adjustment is simple and convenient.
The self-operated flow control valve has two functions of flow setting and adjusting and flow keeping constant. And the two functions are realized by two parts in the valve body. In the aspect of flow setting and adjusting, valves with two structures are mainly on the market at present, one is a rotating sleeve type switch adjusting structure, the structure changes the flow by changing the flow area of a main valve body in the radial direction through a rotating sleeve, and the rotating sleeve and the valve body have a certain gap so as to be convenient for manual operation or driving by using an electric actuator, and the leakage amount is inevitably increased due to the existence of the gap, so that the rotating sleeve is difficult to be completely closed. The other is a plane sealing structure, the water passing hole is opened or closed through two plane friction pairs, and the structure also has the problems of large leakage and large torque.
In addition, the traditional self-operated flow control valve adopts a diaphragm to separate the pressure of a water outlet cavity and the pressure of a middle cavity (two pressure cavities), and then the diaphragm drives an automatic valve plug to move up and down to form throttling depressurization, so that the purpose of automatically adjusting the pressure difference and the flow is achieved. Countless practices have demonstrated the following problems with membranes: (1) the membrane is thin and is easy to break; (2) The diaphragm is often crushed due to the problem that the diaphragm needs to bear unidirectional pressure; (3) Because the outer edge of the diaphragm is fixed, the diaphragm moves up and down through concave-convex deformation, and the stress is uneven in the moving process, so that the moving linearity of the valve plug is poor; (4) Since the diaphragm only fluctuates up and down in the middle portion, valve vibration is frequently generated (the diaphragm is in an equal amount in use, which is a cause of frequent vibration).
The traditional self-operated flow control valve emphasizes on the performance of ensuring constant medium flow, but cannot ensure that the medium flow is completely cut off in a cut-off state, so that the cut-off function cannot be realized, and the discharge capacity is still large under many conditions. This necessitates the addition of a shut-off valve in the engineering, which increases the cost and installation space.
Disclosure of Invention
The invention aims to provide a novel self-operated rising stem flow control valve with a piston structure, which realizes stable control and tight shutoff of flow.
The invention is realized by adopting the following technical scheme:
the self-operated rising stem flow control valve with the piston structure comprises a valve body, wherein a cavity is arranged at the inlet of the valve body, and a cavity is arranged at the outlet of the valve body. The middle part in the valve body is divided into an upper cavity and a lower cavity by arranging a valve seat, an inner cavity is arranged in the lower cavity, the inner cavity is naturally communicated with an inlet cavity, the upper cavity is naturally communicated with an outlet cavity, the inner cavity is communicated with the lower cavity by an upper opening at the upper bottom of the inner cavity, and the inner cavity is communicated with the lower cavity by a lower opening at the lower bottom of the inner cavity; the valve seat is provided with a flow port, and the flow port, the upper port and the lower port are coaxially arranged; the valve cover is installed at a valve port of the upper cavity, a screw shaft is assembled in the center of the valve cover through threads, a valve plate for opening and closing the flow port is arranged at the bottom end of the screw shaft, a hollow connecting rod is fixedly installed in a feedback through hole in the bottom surface of the screw shaft, the hollow connecting rod is arranged at the upper end of the hollow valve rod, and a lower valve plate for controlling the opening and closing of the lower port and an upper valve plate for controlling the opening and closing of the upper port are arranged outside the hollow valve rod; the bottom end of the hollow valve rod is provided with a piston, and the side surface of the piston is in sliding seal with the side wall of the bottom of the lower cavity; and a bottom cover is arranged at a valve port of the lower cavity, a spring is assembled in the bottom cover, and the spring is assembled between the piston and the bottom surface of the bottom cover.
When in work, water flows into the inner cavity (pressure in the cavity) from the inlet cavityP 1 ) Then enters into the lower cavity (cavity pressure) through the upper port and the lower port respectivelyP 2 ) Then through the flow port into the upper chamber (pressure in the chamber)P 3 ) Until it flows out. And (3) adjusting functions: when the flow needs to be opened or closed, the screw shaft is rotated to drive the valve plate to reciprocate upwards or downwards, so that the flow of the flow opening (throttling opening) can be adjusted, and the valve cover is provided with flow scale indication to display the flow value flowing through the valve. Constant current maintaining function: (1) When the inlet pressure increases, i.e. pressureP 1 Increase (resulting in pressure entering the lower chamberP 2 Increase), the water pressure lower piston drives the bivalve board downstream of valve rod simultaneously, makes the opening volume of bivalve hole (go up the opening and pass down) reduce, throttles the bivalve hole simultaneously for pressureP 2 Decreasing to the design value, the pressure is maintainedP 2 –P 3 The flow is basically unchanged, and the flow is ensured to be basically unchanged. (2) When the inlet pressure is reduced, i.e.P 1 Decrease (resulting in pressure entering the lower chamber)P 2 Decrease) due to activityThe plug drives the double valve plates of the valve rod to move upwards under the action of the spring, so that the opening amount of the double valve holes is increased, and the pressure is increasedP 2 Increasing to the design value, the pressure is maintainedP 2 –P 3 The flow is basically unchanged, and the flow is ensured to be basically unchanged. (3) When the outlet pressure is higherP 3 When the pressure in the upper cavity is increasedP 3 The pressure is transmitted into the bottom cavity through the feedback channel, so that the piston drives the double valve plates of the valve rod to move upwards, the opening amount of the double valve holes is increased, and the pressure is enabled to be appliedP 2 And also correspondingly increased, the pressure is maintainedP 2 –P 3 The flow is basically unchanged, and the flow is ensured to be basically unchanged. (4) When the outlet pressure is higherP 3 When the pressure in the upper cavity is reducedP 3 The pressure is transmitted to the bottom cavity through the feedback channel, so that the piston drives the double valve plates of the valve rod to move downwards, the opening amount of the double valve holes is reduced, the double valve holes are throttled simultaneously, and the pressure is enabled to beP 2 And also correspondingly reduced, the pressure is maintainedP 2 –P 3 The flow is basically unchanged, and the flow is ensured to be basically unchanged.
Because in the existing self-operated flow control valve, the valve rod is controlled to move up and down by the diaphragm, the original diaphragm is easy to break and scratch, and the diaphragm is serious in vibration, the diaphragm is fixed, the valve rod is driven to move up and down only by the elasticity in the center of the diaphragm, and the control mode can not linearly control the valve rod to move up and down, so the valve rod often vibrates frequently.
The invention has reasonable design and better practical application value.
Drawings
Figure 1 shows a schematic view of the invention (flat seal).
Figure 2 shows a schematic view of the invention (cone seal).
In the figure: 1-valve body, 2-inlet chamber, 3-outlet chamber, 4-upper chamber, 5-lower chamber, 6-inner chamber (middle chamber), 7-valve seat, 8-upper port, 9-lower port, 10-flow port, 11-valve cover, 12-screw shaft, 13-valve plate, 14-feedback through hole, 15-hollow connecting rod, 16-hollow valve rod, 17-upper valve plate, 18-lower valve plate, 19-piston, 20-piston seal, 21-bottom cover, 22-spring, 23-nut, 24-feedback connecting hole, 25-bottom chamber, 26-thread seal.
Detailed Description
The following detailed description of specific embodiments of the invention refers to the accompanying drawings.
A self-operated rising stem flow control valve with a piston structure is shown in figures 1 and 2 and comprises a valve body 1, wherein an inlet cavity 2 is arranged at an inlet of the valve body 1, and an outlet cavity 3 is arranged at an outlet of the valve body 1. The middle part in the valve body 1 is divided into an upper cavity 4 and a lower cavity 5 through an integrally arranged valve seat 7, or the valve seat 7 can be independently assembled. An inner cavity 6 is arranged in the lower cavity 5, the inner cavity 6 is directly communicated with the inlet cavity 2 in an open mode (namely, natural communication), and the upper cavity 4 is directly communicated with the outlet cavity 3 in an open mode (namely, natural communication).
As shown in fig. 1 and 2, the inner cavity 6 is communicated with the lower cavity 5 through an upper port 8 at the upper bottom of the inner cavity, and the inner cavity 6 is communicated with the lower cavity 5 through a lower port 9 at the lower bottom of the inner cavity. The valve seat 7 is provided with a flow opening 10, and the flow opening 10, the upper opening 8 and the lower opening 9 are coaxially arranged (located on the same axis); valve gap 11 is installed through the screw in the valve port department of epicoele 4, and valve gap 11 central authorities are equipped with screw shaft 12 through the screw thread, and screw shaft 12 top is equipped with the rotary tank for screw shaft is rotatory, and screw shaft 12 bottom is equipped with the valve plate 13 that is used for opening and close circulation opening 10. A hollow connecting rod 15 is fixedly arranged in a feedback through hole 14 in the bottom surface of the screw shaft 12, the lower part of the hollow connecting rod 15 is inserted into the upper end of a hollow valve rod 16, the bottom of the hollow connecting rod 15 can be fixedly assembled in the upper end of the hollow valve rod 16, and a bottom cover 21 is communicated with the upper cavity 4 through the feedback through hole 14, the hollow connecting rod 15 and the hollow valve rod 16 to form a feedback channel I; the hollow connecting rod 15 has the function of realizing the relative movement between the hollow valve rod 16 and the valve plate 13, so the hollow connecting rod 15 is usually fixed in the feedback through hole 14 through interference fit, the hollow valve rod 16 moves up and down along the hollow connecting rod 15 under the pressure of water flow, or the hollow connecting rod 15 can also be fixed in the upper end of the hollow valve rod 16 through interference fit, or as shown in fig. 1, the hollow connecting rod 15 is integrally arranged at the upper end of the hollow valve rod 16, and the hollow connecting rod 15 is driven by the hollow valve rod 16 to move up and down in the feedback through hole 14.
As shown in fig. 1 and 2, a lower valve plate 18 for controlling the opening and closing of the lower port 9 and an upper valve plate 17 for controlling the opening and closing of the upper port 8 are provided outside the hollow stem 16. The bottom end of the hollow valve rod 16 is provided with a piston 19 through a limiting groove and a nut 23, the side surface of the piston 19 is in sliding seal with the side wall of the bottom of the lower cavity 5 (the piston 19 is sealed with the side wall of the bottom of the lower cavity 5 through a piston sealing element 20, and the bottom cavity 25 of the bottom cover 21 is separated from the lower cavity 5); a bottom cover 21 is installed at the valve port of the lower cavity 5 through a screw, a spring 22 is assembled in the bottom cover 21, and the spring 22 is assembled between the bottom surface of the piston 19 and the bottom surface of the bottom cover 21. The bottom cavity 25 of the bottom cover 21 is communicated with the lower cavity 5 by the feedback connecting hole 24 to serve as a feedback channel II, the traditional valve only has the feedback channel II, so that the lower cavity is communicated with the outlet cavity, and the pressure of the outlet cavity and the spring jointly overcome the pressure balance of the inlet cavity.
As shown in figure 1, a temperature measuring part is arranged on the wall of the outlet cavity of the valve body 1. The valve plate 13 adopts a plane sealing mode to seal the flow port 10 of the valve body sealing seat 7, and a fixed soft sealing material is selected on the valve plate 13.
As shown in fig. 2, the valve plate 13 seals the flow opening 10 of the valve body seal holder 7 in a cone-seal manner.
When the flow control valve is used, the number of turns and the angle of rotation are designed according to the size of the calculated water amount, and the water amount can be accurately controlled manually or electrically.
The self-operated rising stem flow control valve with the piston structure has the structural characteristics that: 1. the valve body is internally designed with double plug holes (an upper port and a lower port), the distance between the double valve plates on the hollow valve rod is the same as that of the double plug holes, and the double valve plates move up and down to adjust the flow and pressure of the double plug holes. 2. The lower cavity and the bottom cover are separated by a piston, and the two cavities are not communicated with each other. 3. The piston is installed at the bottom of the lower cavity, the piston is used for replacing an original diaphragm, the diaphragm is still fixed in nature, only the elastic center of the diaphragm is used for driving the valve rod to move, the control mode is not accurate, after the diaphragm is replaced by the piston, the piston can move up and down integrally, the stroke is controllable, the change of water flow pressure can be changed into the up-and-down movement of the piston more accurately, and water flow and pressure are controlled. 4. The shutoff of control valve adopts the up-and-down motion of valve plate to realize closing to the circulation mouth, and is more direct high-efficient, and the valve plate also can install sealing material moreover, and control valve realizes tighter sealed effect when closing.
The working principle is as follows:
1. the water flow flows into the inner cavity from the inlet cavity (pressure in the cavity)P 1 ) Then enters the middle cavity (cavity pressure) through the upper port and the lower port respectivelyP 2 ) Then enters the upper cavity (pressure in the cavity) through the regulated flow portP 3 ) Until it flows out.
2. And (3) adjusting functions: when the flow needs to be opened or closed, the screw shaft is rotated to drive the valve plate to reciprocate upwards or downwards, so that the flow of the flow port (throttling port) can be regulated, and the valve cover is provided with a flow scale indication to display the flow value passing through the valve.
3. Constant current maintaining function:
when the system pressure changes, or the flow is regulated, the valve inlet-outlet pressure difference changes, for example:
(1) When the inlet pressure increases, i.e. the pressureP 1 Increase (resulting in pressure entering the lower chamberP 2 Increase), the water pressure pushes the piston down, the piston is broken the balance, must atress pushes down the spring, drives the bivalve board downstream of valve rod simultaneously, makes the opening volume of bivalve hole (go up opening and lower opening) reduce, carries out the opening volume simultaneously to bivalve holeThrottling, to enable pressureP 2 Decreasing to the design value, the pressure is maintainedP 2 –P 3 The flow is basically unchanged, and the flow is ensured to be basically unchanged.
(2) When the inlet pressure is reduced, i.e.P 1 Decrease (resulting in pressure entering the lower chamber)P 2 Reduced), the original position of the piston is moved upwards due to the spring force, and then the piston drives the double valve plates of the valve rod to move upwards under the action of the spring, so that the opening amount of the double valve holes is increased, and the pressure is enabled to be appliedP 2 Increasing to the design value, the pressure is maintainedP 2 –P 3 The flow is basically unchanged, and the flow is ensured to be basically unchanged.
Similarly, when the outlet side pressure changes, for example:
(3) When outlet pressure is highP 3 When the output flow rate increases, the output flow rate tends to decrease. At the moment the pressure in the upper chamberP 3 Is transmitted into the bottom cavity through the double feedback channels,P 3 the increase makes the pressure of the bottom cavity increase and the spring form resultant force to make the piston drive the double valve plates of the valve rod to move upwards, so that the opening amount of the double valve holes is increased, and the pressure is enabled to be increasedP 2 Also correspondingly increased at the same time, the pressure is maintainedP 2 –P 3 The flow is basically unchanged, and the flow is ensured to be basically unchanged.
(4) When outlet pressure is highP 3 When the pressure of the bottom cavity is reduced, the pressure of the bottom cavity is reduced correspondingly, and the original balance is broken. At the moment the pressure in the upper chamberP 3 The double-valve-hole throttling valve is transmitted into a bottom cavity through double feedback channels, so that a piston drives double valve plates of a valve rod to move downwards, the opening amount of the double valve holes is reduced, the double valve holes are throttled simultaneously, and pressure is enabled to be appliedP 2 And also correspondingly reduced, the pressure is maintainedP 2 –P 3 The flow is basically unchanged, and the flow is ensured to be basically unchanged.
The self-operated rising stem flow control valve with the piston structure has the advantage that when the pressure difference between the front and the rear of the valve changes within a certain range, the set flow value can be kept constant.
During concrete implementation, the screw shaft is rotated when opening and closing, the number of turns of rotation is linear relation with flow, the error is less can be accomplished with the scale to flow, and the flow is controllable moreover, can control the flow size according to the number of turns of rotation. When the mode that adopts rotatory screw shaft to open and close, can not produce the dead phenomenon of card, the moment of torsion is little, and manual opening is closed laborsavingly, selects for use electric actuator moreover, and little executor cost is low can be selected for use to the big valve.
The technical solution in the embodiment of the present invention is clearly and completely described above. It should be understood that the embodiments described herein are only a few examples, and not all examples, and that all other examples that can be made by one skilled in the art without any inventive work should also fall within the scope of the present invention.
Claims (5)
1. A self-operated rising stem flow control valve with a piston structure comprises a valve body (1), wherein an inlet cavity (2) is formed in the inlet of the valve body (1), and an outlet cavity (3) is formed in the outlet of the valve body (1);
the method is characterized in that: the valve body (1) is divided into an upper cavity (4) and a lower cavity (5) by a valve seat (7), an inner cavity (6) is arranged in the lower cavity (5), the inner cavity (6) is naturally communicated with the inlet cavity (2), the upper cavity (4) is naturally communicated with the outlet cavity (3), the inner cavity (6) is communicated with the lower cavity (5) through an upper port (8) at the upper bottom of the inner cavity, and the inner cavity (6) is communicated with the lower cavity (5) through a lower port (9) at the lower bottom of the inner cavity; the valve seat (7) is provided with a flow port (10), and the flow port (10), the upper flow port (8) and the lower flow port (9) are coaxially arranged; the valve cover (11) is installed at a valve port of the upper cavity (4), a screw shaft (12) is assembled in the center of the valve cover (11) through threads, a valve plate (13) used for opening and closing the circulation port (10) is arranged at the bottom end of the screw shaft (12), a hollow connecting rod (15) is installed in a feedback through hole (14) in the bottom surface of the screw shaft (12), the hollow connecting rod (15) is arranged at the upper end of a hollow valve rod (16), and the feedback through hole (14), the hollow connecting rod (15) and the hollow valve rod (16) are used for communicating a bottom cover (21) with the upper cavity (4) to form a feedback channel I; a lower valve plate (18) for controlling the opening and closing of the lower through hole (9) and an upper valve plate (17) for controlling the opening and closing of the upper through hole (8) are arranged outside the hollow valve rod (16); a piston (19) is mounted at the bottom end of the hollow valve rod (16), and the side surface of the piston (19) is in sliding seal with the side wall of the bottom of the lower cavity (5); a bottom cover (21) is arranged at a valve port of the lower cavity (5), a spring (22) is assembled in the bottom cover (21), and the spring (22) is assembled between the piston (19) and the bottom surface of the bottom cover (21);
the piston (19) is sealed with the side wall of the bottom of the lower cavity (5) through a piston sealing element (20), and the bottom cavity (25) of the bottom cover (21) is isolated from the lower cavity (5);
and the bottom cavity (25) of the bottom cover (21) is communicated with the outlet cavity (3) by adopting a feedback connecting hole (24) to be used as a feedback channel II.
2. The self-operated rising stem flow control valve with a piston structure as claimed in claim 1, wherein: and a temperature measuring piece is arranged on the wall of the outlet cavity of the valve body (1).
3. The self-operated rising stem flow control valve with the piston structure as claimed in claim 2, wherein: the valve plate (13) seals the flow opening (10) of the valve seat (7) in a plane sealing mode.
4. The self-operated rising stem flow control valve with a piston structure as claimed in claim 2, wherein: the valve plate (13) seals the flow opening (10) of the valve seat (7) in a cone sealing mode.
5. The self-operated rising stem flow control valve with a piston structure as claimed in claim 1, wherein: the top of the screw shaft (12) is provided with a rotary groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011599089.XA CN112431953B (en) | 2020-12-30 | 2020-12-30 | Self-operated rising stem flow control valve with piston structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011599089.XA CN112431953B (en) | 2020-12-30 | 2020-12-30 | Self-operated rising stem flow control valve with piston structure |
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| CN112431953A CN112431953A (en) | 2021-03-02 |
| CN112431953B true CN112431953B (en) | 2023-03-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011599089.XA Active CN112431953B (en) | 2020-12-30 | 2020-12-30 | Self-operated rising stem flow control valve with piston structure |
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| GB1186970A (en) * | 1967-09-14 | 1970-04-08 | Bosch Gmbh Robert | Improvements in Pressure-Regulating Valves. |
| JPH11259146A (en) * | 1998-03-06 | 1999-09-24 | Ckd Corp | Pressure control valve |
| CN106609847A (en) * | 2015-10-23 | 2017-05-03 | 常州市汇丰船舶附件制造有限公司 | Pulsed concentrated air inflow closing device |
| CN109442077A (en) * | 2018-12-11 | 2019-03-08 | 晋中职业技术学院 | A kind of Remote control valve door |
| CN110486515A (en) * | 2018-05-14 | 2019-11-22 | 新乡航空工业(集团)有限公司 | Motor vehicle braking system and its pressure regulator valve, vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| GB1264119A (en) * | 1968-05-10 | 1972-02-16 | ||
| US7213613B2 (en) * | 2005-06-14 | 2007-05-08 | Delphi Technologies, Inc. | High-flow dual poppet valve having equalized closing forces |
| US7779863B2 (en) * | 2007-06-29 | 2010-08-24 | Raytheon Sarcos, Llc | Pressure control valve having an asymmetric valving structure |
| US7712312B2 (en) * | 2007-10-18 | 2010-05-11 | Ford Global Technologies, Llc | Pressure balanced swing valve for engine system |
| CN203743540U (en) * | 2014-03-19 | 2014-07-30 | 王建波 | Self-operated differential pressure control valve |
| CN203757110U (en) * | 2014-03-20 | 2014-08-06 | 浙江科海仪表有限公司 | Self-operated internal pressure tapping type adjusting valve |
| CN108916149B (en) * | 2018-08-31 | 2024-03-08 | 圣邦集团有限公司 | Hydraulic multi-way valve and hydraulic control system with same |
| CN111503337A (en) * | 2020-06-01 | 2020-08-07 | 山西建工申华暖通设备有限公司 | Plane sealing self-operated flow control valve |
-
2020
- 2020-12-30 CN CN202011599089.XA patent/CN112431953B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1186970A (en) * | 1967-09-14 | 1970-04-08 | Bosch Gmbh Robert | Improvements in Pressure-Regulating Valves. |
| JPH11259146A (en) * | 1998-03-06 | 1999-09-24 | Ckd Corp | Pressure control valve |
| CN106609847A (en) * | 2015-10-23 | 2017-05-03 | 常州市汇丰船舶附件制造有限公司 | Pulsed concentrated air inflow closing device |
| CN110486515A (en) * | 2018-05-14 | 2019-11-22 | 新乡航空工业(集团)有限公司 | Motor vehicle braking system and its pressure regulator valve, vehicle |
| CN109442077A (en) * | 2018-12-11 | 2019-03-08 | 晋中职业技术学院 | A kind of Remote control valve door |
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| CN112431953A (en) | 2021-03-02 |
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