CN110566683B - Non-frequency-motion hammer-eliminating position control valve and mounting method and position control method thereof - Google Patents
Non-frequency-motion hammer-eliminating position control valve and mounting method and position control method thereof Download PDFInfo
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- CN110566683B CN110566683B CN201910919344.5A CN201910919344A CN110566683B CN 110566683 B CN110566683 B CN 110566683B CN 201910919344 A CN201910919344 A CN 201910919344A CN 110566683 B CN110566683 B CN 110566683B
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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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/04—Construction of housing; Use of materials therefor of sliding valves
- F16K27/041—Construction of housing; Use of materials therefor of sliding valves cylindrical slide valves
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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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/22—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution
- F16K3/24—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members
- F16K3/26—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members with fluid passages in the valve member
- F16K3/262—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members with fluid passages in the valve member with a transverse bore in the valve member
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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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
- F16K3/314—Forms or constructions of slides; Attachment of the slide to the 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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/126—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like
- F16K31/1266—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like one side of the diaphragm being acted upon by the circulating fluid
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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
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/02—Means in valves for absorbing fluid energy for preventing water-hammer or noise
- F16K47/023—Means in valves for absorbing fluid energy for preventing water-hammer or noise for preventing water-hammer, e.g. damping of the valve movement
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Valves (AREA)
- Float Valves (AREA)
Abstract
The invention discloses a non-frequency-motion hammer-eliminating position control valve and an installation method and a position control method thereof, and belongs to the field of water pressure control of a water supply network. The non-frequency-movement hammer-eliminating position control valve provided by the invention has the advantages that the control end is respectively communicated with the highest water level and the lowest water level, so that the valve body is opened to feed water into the tank only when the water level in the tank is lower than the water drainage guide pipe, the valve body is closed to stop feeding water only when the water level in the tank is higher than the highest water level, and the valve body does not move when the water level is between the lowest water level and the highest water level, so that the frequent opening and closing in the water level control process can be prevented, the impact of the frequent movement of the valve on the valve structure is eliminated, the service life is longer, the valve is more difficult to damage, meanwhile, the pipeline water hammer is avoided.
Description
Technical Field
The invention belongs to the field of water pressure control of a water supply network, and particularly relates to a non-frequency-driven hammer-eliminating position control valve and an installation method and a position control method thereof.
Background
The existing hydraulic water level control valve is widely applied to water tanks in water supply systems and water pipelines and is used for controlling the water level of the water tank and avoiding overflow of the water tank. However, in practice, the hydraulic water level control valve has the problem of frequent opening and closing in the working process of controlling the water level, so that the pressure of a pipeline vibrates violently, the safety of the pipeline is adversely affected, meanwhile, the frequent pressure vibration accelerates the abrasion of a valve control floating ball, the overall damage and failure phenomena of a valve system are more, and finally, the accidents of water pool overflow and water flooding working areas are caused. Therefore, a safer water level control device is urgently needed for a water supply pipe network and a water pool in a water conveying pipeline.
Disclosure of Invention
The invention aims to overcome the defect that the existing position control valve is frequently started and stopped, and provides a non-frequency-motion hammer-eliminating position control valve, and an installation method and a position control method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
a non-frequency-motion hammer-eliminating position control valve comprises a valve body, wherein a water inlet is formed in the bottom of the valve body, a horizontal baffle is arranged on the inner wall of the valve body, and a first through hole is formed in the horizontal baffle;
the top end of the valve body is provided with a valve cover, the upper end face of the valve cover is provided with a second through hole, and the second through hole is coaxial with the first through hole and has the same aperture;
a valve seat is arranged in the valve body below the horizontal baffle, a piston cylinder is arranged on the valve seat, the piston cylinder penetrates through the first through hole and the second through hole and then extends to the position above the second through hole, and the outer wall of the piston cylinder is respectively contacted with the horizontal baffle and the valve cover;
a diaphragm is arranged between the piston cylinder and the valve body, the diaphragm divides a space between a horizontal baffle plate positioned on the periphery of the piston cylinder and the valve cover into an upper compartment and a lower compartment, and a water drainage guide pipe is arranged on the valve cover.
Furthermore, a vent pipe is arranged on the valve body forming the lower compartment.
Furthermore, the periphery of the piston cylinder is sleeved with a porous valve sleeve, and the bottom of the porous valve sleeve is positioned on the valve seat.
Furthermore, a diaphragm lower pressing plate is arranged on the periphery of the piston cylinder, a diaphragm upper pressing plate is arranged on the inner wall of the valve body or the valve cover, and the diaphragm is fixedly connected with the diaphragm upper pressing plate through the diaphragm lower pressing plate.
Further, piston cylinder outer wall and horizontal baffle sealing connection, piston cylinder outer wall and valve gap sealing connection.
The mounting method of the non-frequency-motion hammer-eliminating position control valve comprises the following operations:
the water inlet of the valve body is used as a water inlet end to be connected with a water source, the water outlet of the valve body is used as a water supply end to be connected with a water pool, the water drainage pipe is used as a control end to be respectively communicated with the highest water level and the lowest water level of the water pool, the highest water level is provided with a water inlet funnel, and the lowest water level is provided with a ball float valve.
The position control method of the non-frequency-motion hammer-eliminating position control valve comprises the following operations:
when the water level in the water tank is lower than the lowest water level, the ball float valve sinks, water in the upper compartment is drained through the drainage guide pipe, water in a water source enters the valve body through the water inlet to push the membrane and the piston cylinder to move upwards, water in the valve body enters the inner cavity of the piston cylinder and enters the water tank through the water outlet of the valve body to be filled with water;
when the water level in the water tank is at the lowest water level, the ball float valve floats upwards, and the drain valve is closed;
when the water level in the water tank is between the lowest water level and the highest water level, the drainage is closed, and the water tank is continuously filled with water;
when the water level in the water tank is higher than the highest water level, the water in the water tank fills water into the upper compartment through a pipeline where the water inlet funnel is located, the membrane and the piston cylinder are pushed to move downwards until the water reaches the valve seat, and the water filling passage is closed;
when the valve body is closed and the pipeline has water hammer, the piston cylinder and the diaphragm assembly move upwards quickly, the valve body opens to drain water into the tank, and the pressure of the water hammer is released, so that the aim of eliminating the water hammer is fulfilled.
Compared with the prior art, the invention has the following beneficial effects:
the non-frequency-movement hammer-eliminating position control valve provided by the invention has the advantages that the control end is respectively communicated with the highest water level and the lowest water level, so that the valve body is opened to feed water into the tank only when the water level in the tank is lower than the water drainage guide pipe, the valve body is closed to stop feeding water only when the water level in the tank is higher than the highest water level, and the valve body does not move when the water level is between the lowest water level and the highest water level, so that the frequent opening and closing in the water level control process can be prevented, the impact of the frequent movement of the valve on the valve structure is eliminated, the service life is longer, the valve is more difficult to damage, meanwhile, the pipeline water hammer is avoided.
Further, the vent tube maintains the piston and the lower portion of the diaphragm in a non-pressurized state.
Furthermore, the sealing connection plays a role in pressure leakage prevention.
Furthermore, the diaphragm upper pressing plate and the diaphragm lower pressing plate play a role in fixedly mounting the diaphragm.
Furthermore, the porous valve sleeve plays roles in rectifying and hedging and stabilizing energy dissipation.
According to the position control method of the non-frequency-motion hammer-eliminating position control valve, the diaphragm piston sliding assembly is arranged, when the valve is arranged in a water tank, the water level of the water tank is automatically and stably controlled, namely when the water level of the water tank is reduced to be below the lowest water level, water is fed into the water tank by starting, when the water level reaches the highest water level, the water is automatically closed and stopped to feed water, and in the water level control process, frequent opening and closing are avoided, so that the valve is safe and stable; meanwhile, when large pressure fluctuation occurs to the water hammer in the pipeline system during the work of controlling the water level by the valve or in a closed state, the valve can be quickly opened to reduce the pressure peak value of the water hammer, so that the problem that the water hammer is generated by the existing water level control valve is solved, and the effects of controlling the water level and eliminating the water hammer are realized.
Drawings
FIG. 1 is a cross-sectional view of a lost motion position valve of the present invention;
FIG. 2 is a state diagram of a non-oscillating deadweight position valve of the present invention, wherein 2(a) is a valve closed state diagram and 2(b) is a valve open state diagram;
FIG. 3 is a diagram of the in-tank installation of the lost-motion position control valve of the present invention;
FIG. 4 is a vertical installation outside the tank of the lost-motion position control valve of the present invention;
FIG. 5 is a horizontal out-of-pool mounting view of the non-frequency actuated de-hammer position control valve of the present invention.
Wherein: 1-a valve body; 2-valve seat; 3-lower sealing ring; 4-a piston cylinder; 5-a membrane; 6-pressing the membrane; 7-a water drainage conduit; 8-a ball float valve; 9-valve cover; 10-upper sealing ring; 11-a water inlet vertical pipe; 12-a porous valve sleeve; 13-membrane pressing plate; 14-a ventilation pipe; 15-water inlet funnel.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions 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 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.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1, fig. 1 is a cross-sectional view of a non-frequency-motion hammer-eliminating position control valve of the present invention, the non-frequency-motion hammer-eliminating position control valve of the present invention includes a valve body 1, a valve seat 2, a lower sealing ring 3, a piston cylinder 4, a diaphragm 5, a diaphragm upper pressure plate 6, a water discharge conduit 7, a valve cover 9, an upper sealing ring 10, a porous valve sleeve 12, a diaphragm lower pressure plate 13 and a vent pipe 14, a horizontal baffle and the valve seat 2 are arranged in the valve body 1, the piston cylinder 4 is installed in a through hole in the horizontal baffle, the bottom of the piston cylinder is in contact with the valve seat 2, and the periphery of the piston cylinder 4 below the; the upper end of the valve body 1 is provided with a valve cover 9, the piston cylinder 4 extends out of the valve cover 9, the outer wall of the piston cylinder 4, the valve body 1 and the valve cover 9 form a closed space, and the contact parts of the valve cover 9 and the horizontal baffle plate and the piston cylinder 4 are respectively provided with an upper sealing ring 10 and a lower sealing ring 3; the outer wall of the piston cylinder 4 is provided with a diaphragm lower pressing plate 13, the valve body 1 is provided with a diaphragm upper pressing plate 6, a diaphragm 5 is arranged between the diaphragm and the upper pressing plate, the diaphragm 5 divides the closed space into an upper compartment and a lower compartment, the upper compartment is provided with a water drainage conduit 7, and the lower compartment is provided with a vent pipe 14.
Referring to fig. 2, fig. 2 is a state diagram of the non-frequency-motion hammer-canceling position control valve of the present invention, wherein 2(a) is a valve closing state diagram, and 2(b) is a valve opening state diagram, when the valve is in a valve closing state, the upper compartment is filled with water, the piston cylinder 4 and the diaphragm 5 are pressed to move downwards, the water inlet side below the piston cylinder 4 is in contact with the valve seat 2, and the valve is closed; when the valve is in an open state, water in the upper compartment flows out through the water drainage conduit 7 to be decompressed, the diaphragm 5 and the piston cylinder 4 lose pressure, the piston 4 and the diaphragm 5 move upwards under the action of the water pressure of the pipeline, and water flows into the water tank through the inner cavity of the piston cylinder 4.
The invention relates to a mounting method of a no-frequency-motion hammer-eliminating position control valve, which comprises the following specific steps:
the water inlet of the valve body 1 is used as a water inlet end to be connected with a water source, the water outlet of the valve body 1 is used as a water supply end to be connected with a water pool, the water drainage pipe 7 is used as a control end to be respectively communicated with the highest water level and the lowest water level of the water pool, a water inlet funnel 15 is arranged at the highest water level, and a ball float valve 8 is arranged at the lowest water level.
The working principle of the non-frequency-motion hammer-eliminating position control valve is as follows:
when the water level in the water tank is lower than the lowest water level, the ball float valve 8 sinks, water in the upper compartment is drained through the drainage conduit 7, water in a water source enters the valve body 1 through the water inlet, the diaphragm 5 and the piston cylinder 4 are pushed to move upwards, water in the valve body 1 enters the inner cavity of the piston cylinder 4 and enters the water tank through the water outlet of the valve body 1 for water filling;
when the water level in the water tank is at the lowest water level, the ball float valve 8 floats upwards, and the drainage is closed;
when the water level in the water tank is between the lowest water level and the highest water level, the drainage is closed, and the water tank is continuously filled with water;
when the water level in the water tank is higher than the highest water level, the water in the water tank fills water into the upper compartment through a pipeline where the water inlet funnel 15 is located, the membrane 5 and the piston cylinder 4 are pushed to move downwards until the water reaches the valve seat 2, and a water filling passage is closed;
when the valve body 1 is in a closed state, water hammer occurs in a pipeline, the piston 4 and the diaphragm 5 are rapidly moved upwards to open a water outlet pipe in the tank, the water hammer pressure is released, the purpose of eliminating the water hammer is achieved, a certain position difference exists between the top of the water inlet vertical pipe 11 and the water outlet pipe 7, the water level in the tank is only lower than the water outlet pipe 7, the valve is opened to feed water into the tank, the valve is closed to stop feeding water only when the water level in the tank is higher than the top of the water inlet vertical pipe 11, therefore, frequent opening and closing in the water level control process can be prevented, the impact of frequent movement of the valve on a valve structure is eliminated, the service life of the valve is prolonged, and the valve is more convenient to use, avoids pipeline water hammer and is favorable for the safety of a pipeline water supply system.
Referring to fig. 3-5, the invention is directed to different installation methods of the non-frequency-driven hammer-elimination position control valve, fig. 3 is a diagram of the installation inside the tank of the non-frequency-driven hammer-elimination position control valve, fig. 4 is a diagram of the vertical installation outside the tank of the non-frequency-driven hammer-elimination position control valve, fig. 5 is a diagram of the horizontal installation outside the tank of the non-frequency-driven hammer-elimination position control valve, and the non-frequency-driven hammer-elimination position control valve can be applied to different scenes.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (6)
1. A non-frequency-motion hammer-eliminating position control valve is characterized by comprising a valve body (1), wherein a water inlet is formed in the bottom of the valve body (1), a horizontal baffle is arranged on the inner wall of the valve body (1), and a first through hole is formed in the horizontal baffle;
a valve cover (9) is arranged at the top end of the valve body (1), a second through hole is formed in the upper end face of the valve cover (9), and the second through hole is coaxial with the first through hole and has the same aperture;
a valve seat (2) is arranged in the valve body (1) below the horizontal baffle plate, a piston cylinder (4) is arranged on the valve seat (2), the piston cylinder (4) penetrates through the first through hole and the second through hole and then extends to the position above the second through hole, and the outer wall of the piston cylinder (4) is respectively contacted with the horizontal baffle plate and the valve cover (9);
a diaphragm (5) is arranged between the piston cylinder (4) and the valve body (1), the diaphragm (5) divides a space between a horizontal baffle plate positioned at the periphery of the piston cylinder (4) and the valve cover (9) into an upper compartment and a lower compartment, and a water drainage guide pipe (7) is arranged on the valve cover (9);
the periphery of the piston cylinder (4) is sleeved with a porous valve sleeve (12), and the bottom of the porous valve sleeve (12) is positioned on the valve seat (2).
2. A valve according to claim 1, characterised in that the valve body (1) forming the lower compartment is provided with a vent pipe (14).
3. The valve of claim 1, wherein a diaphragm lower pressing plate (13) is arranged on the periphery of the piston cylinder (4), a diaphragm upper pressing plate (6) is arranged on the inner wall of the valve body (1) or the valve cover (9), and the diaphragm (5) is fixedly connected with the diaphragm upper pressing plate (6) through the diaphragm lower pressing plate (13).
4. The valve of claim 1, wherein the outer wall of the piston cylinder (4) is hermetically connected with the horizontal baffle, and the outer wall of the piston cylinder (4) is hermetically connected with the valve cover (9).
5. A method of installing a non-frequency-actuated, de-hammered position control valve according to any one of claims 1 to 4, comprising the operations of:
the water inlet of the valve body (1) is used as a water inlet end to be connected with a water source, the water outlet of the valve body (1) is used as a water supply end to be connected with a water pool, the water drainage guide pipe (7) is used as a control end to be respectively communicated with the highest water level and the lowest water level of the water pool, a water inlet funnel (15) is arranged at the highest water level, and a ball float valve (8) is arranged at the lowest water level.
6. Method for the control of a non-oscillating deadening position valve according to any one of claims 1 to 4, characterized in that it comprises the following operations:
when the water level in the water tank is lower than the lowest water level, the ball float valve (8) sinks, water in the upper compartment is drained through the drainage guide pipe (7), water in a water source enters the valve body (1) through the water inlet, the diaphragm (5) and the piston cylinder (4) are pushed to move upwards, water in the valve body (1) enters the inner cavity of the piston cylinder (4) and enters the water tank through the water outlet of the valve body (1) to be filled with water;
when the water level in the water tank is at the lowest water level, the ball float valve (8) floats upwards, and the drainage is closed;
when the water level in the water tank is between the lowest water level and the highest water level, the drainage is closed, and the water tank is continuously filled with water;
when the water level in the water tank is higher than the highest water level, the water in the water tank fills water into the upper compartment through a pipeline where the water inlet funnel (15) is located, the diaphragm (5) and the piston cylinder (4) are pushed to move downwards until the diaphragm reaches the valve seat (2), and a water filling passage is closed;
when the valve body (1) is in a closed state and water hammer occurs in a pipeline, the piston cylinder (4) and the diaphragm (5) component move upwards rapidly, the valve body (1) is opened to drain water into the pool, and the pressure of the water hammer is released, so that the aim of eliminating the water hammer is fulfilled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910919344.5A CN110566683B (en) | 2019-09-26 | 2019-09-26 | Non-frequency-motion hammer-eliminating position control valve and mounting method and position control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910919344.5A CN110566683B (en) | 2019-09-26 | 2019-09-26 | Non-frequency-motion hammer-eliminating position control valve and mounting method and position control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110566683A CN110566683A (en) | 2019-12-13 |
| CN110566683B true CN110566683B (en) | 2021-07-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910919344.5A Active CN110566683B (en) | 2019-09-26 | 2019-09-26 | Non-frequency-motion hammer-eliminating position control valve and mounting method and position control method thereof |
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| CN (1) | CN110566683B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112037746B (en) * | 2020-07-31 | 2023-03-14 | 清华大学 | Diversion noise reduction structure, diversion noise reduction assembly and control rod hydraulic drive system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2095310U (en) * | 1991-03-06 | 1992-02-05 | 马有江 | Float direct control stop valve |
| CN101435518A (en) * | 2008-12-09 | 2009-05-20 | 华中科技大学 | Liquid level control valve |
| KR100962263B1 (en) * | 2008-02-19 | 2010-06-11 | 김태균 | Pressure Reducing Valve with strongly reinforced structure |
| CN201953526U (en) * | 2010-12-30 | 2011-08-31 | 长城汽车股份有限公司 | Check valve for drainage and dust discharging port of automobile engine |
| CN207437828U (en) * | 2017-10-09 | 2018-06-01 | 厦门市欧立通电子科技开发有限公司 | A kind of waterway controlling valve component |
-
2019
- 2019-09-26 CN CN201910919344.5A patent/CN110566683B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2095310U (en) * | 1991-03-06 | 1992-02-05 | 马有江 | Float direct control stop valve |
| KR100962263B1 (en) * | 2008-02-19 | 2010-06-11 | 김태균 | Pressure Reducing Valve with strongly reinforced structure |
| CN101435518A (en) * | 2008-12-09 | 2009-05-20 | 华中科技大学 | Liquid level control valve |
| CN201953526U (en) * | 2010-12-30 | 2011-08-31 | 长城汽车股份有限公司 | Check valve for drainage and dust discharging port of automobile engine |
| CN207437828U (en) * | 2017-10-09 | 2018-06-01 | 厦门市欧立通电子科技开发有限公司 | A kind of waterway controlling valve component |
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| Publication number | Publication date |
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| CN110566683A (en) | 2019-12-13 |
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