CN110989710B - Pressure intelligent regulating device and method for pressure reducing valve - Google Patents

Pressure intelligent regulating device and method for pressure reducing valve Download PDF

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Publication number
CN110989710B
CN110989710B CN201911402876.8A CN201911402876A CN110989710B CN 110989710 B CN110989710 B CN 110989710B CN 201911402876 A CN201911402876 A CN 201911402876A CN 110989710 B CN110989710 B CN 110989710B
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water
pressure
cavity
flow
side wall
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CN110989710A (en
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邓国锋
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Shenzhen Baomingfa Technology Co ltd
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Shenzhen Baomingfa Technology Co ltd
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    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05DSYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D16/00Control of fluid pressure
    • G05D16/20Control of fluid pressure characterised by the use of electric means
    • G05D16/2006Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means
    • G05D16/2013Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means
    • G05D16/2026Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means with a plurality of throttling means
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/20Hydro energy

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Fluid-Driven Valves (AREA)

Abstract

The invention discloses an intelligent pressure regulating device of a pressure reducing valve, which comprises a valve body, wherein a water inlet and a water outlet are formed in the valve body, a first communication cavity, a transition cavity and a second communication cavity are sequentially communicated with the valve body from bottom to top, the water inlet is communicated with the first communication cavity, and the water outlet is communicated with the second communication cavity; the inner side wall of the first communication cavity is connected with the same movable spoiler through a plurality of springs, a plurality of overflow ports for water outflow are formed in the movable spoiler, and an electricity generating device is arranged in the movable spoiler. The invention primarily realizes the water pressure of controlling the water flow by controlling the opening and closing of the first diversion opening, simultaneously, the water pressure of the water flow can be reduced again by the arrangement of the diversion blades, and the power generation device can provide kinetic energy for the pressure sensor and the servo motor at the later time by the arrangement of the rotating rod, so that the opening and closing of the second diversion opening are controlled, and the water pressure of the water flow is reduced again by diversion and opposite flushing.

Description

Pressure intelligent regulating device and method for pressure reducing valve
Technical Field
The invention relates to the technical field of pressure reducing valves, in particular to an intelligent pressure regulating device and method for a pressure reducing valve.
Background
A pressure relief valve is a valve that reduces the inlet pressure to some desired outlet pressure. When the current relief pressure valve is in use, the mode of adjusting water pressure at one time can be only achieved, the frequency of adjusting water pressure is limited, the emergency water flow adjustment with large pressure is limited, the obvious relief pressure effect cannot be achieved, and meanwhile, the relief pressure is achieved through the water pressure effect at present, and the adjustment cannot be carried out according to the water pressure.
Disclosure of Invention
The invention aims to solve the problems in the prior art, and provides an intelligent pressure regulating device and method for a pressure reducing valve.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the intelligent pressure regulating device for the pressure reducing valve comprises a valve body, wherein a water inlet and a water outlet are formed in the valve body, a first communication cavity, a transition cavity and a second communication cavity are sequentially formed in the valve body in a communicated mode from bottom to top, the water inlet is communicated with the first communication cavity, and the water outlet is communicated with the second communication cavity; the inner side wall of the first communication cavity is connected with the same movable flow baffle through a plurality of springs, a plurality of overflow ports for water outflow are formed in the movable flow baffle, an electricity generating device is arranged in the movable flow baffle, two sides of the inner side wall of the first communication cavity are communicated with the transition cavity through first flow guide ports, and the movable flow baffle blocks the first flow guide ports in an initial state; both sides of the inner side wall of the transition cavity are communicated with the water outlet through second diversion ports, and the inlet of the second diversion ports on the side wall of the transition cavity is provided with a pre-diversion device; and a pressure reducing device for reducing water pressure is arranged in the second communication cavity.
Preferably, the outer side wall of the movable spoiler is provided with a sealing rubber layer, and the sealing rubber layer is in contact with the inner side wall of the first communication cavity.
Preferably, the electricity generating device comprises a mounting cavity arranged in the movable spoiler, permanent magnets are fixedly connected to inner walls of two sides of the mounting cavity, magnetism of one side opposite to the two permanent magnets is opposite, a conductive plate is arranged between the two permanent magnets, an insulating prismatic connecting block is arranged above the conductive plate, a conductive cylinder is arranged at the lower end of the conductive plate, and a contact disc in contact with the conductive cylinder is arranged in the mounting cavity.
Preferably, the pre-diversion device comprises a servo motor fixedly connected to the outer side wall of the valve body, the output end of the servo motor is fixedly connected with a double-head threaded rod, two blocking blocks symmetrically arranged are connected to the outer side wall of the double-head threaded rod in a threaded manner, the blocking blocks are located at the inlet end of the second diversion port, and the section of the blocking blocks is in a right triangle shape.
Preferably, the pressure reducing device comprises a fixed block fixedly connected to the inner side wall of the second communication cavity, a rotating rod is rotationally connected to the fixed block, a plurality of guide vanes are fixedly connected to the top of the rotating rod, the bottom of the rotating rod penetrates through the movable spoiler and extends into the installation cavity, the rotating rod is rotationally connected with the movable spoiler, and a sliding groove used for connecting the blocks to slide is formed in the bottom of the rotating rod.
Preferably, the water inlet and the water outlet of the valve body are fixedly connected with connecting flanges, a pressure sensor is arranged in the connecting flange on the water outlet, and the pressure sensor is connected with the inner side wall of the connecting flange through a connecting shaft.
A method for an intelligent pressure regulating device of a pressure reducing valve comprises the following steps:
s1, connecting a valve body with an external water inlet pipe and an external water outlet pipe through a connecting flange, so as to realize the communication between the valve body and the external water inlet pipe and the external water outlet pipe;
s2, when the water flow is small, water enters the water inlet from the external water inlet pipe and enters the transition cavity from the overflow port of the movable spoiler in the first communication cavity, so that the water flows outwards from the water outlet through the second communication cavity;
when the water flow is large, the water flow cannot enter the transition cavity from the overflow port of the movable flow baffle in the first communication cavity, the residual water flow which does not pass through can form large water pressure at the bottom of the movable flow baffle, when the water pressure is larger than the elastic potential energy of the spring, the movable flow baffle moves upwards under the action of the water pressure, at the moment, the first flow guide ports on the two sides of the movable flow baffle are opened, the water body can enter the transition cavity from the first flow guide ports, the water pressure of the water flow is reduced in a water flow dispersing mode, the water flow in the transition cavity enters the water outlet through the second communication cavity, the water flow upward water potential can be reduced through the arrangement of the flow guide blades, namely, part of the upward water potential is dispersed into horizontal water potential, so that the water pressure of the upward water flow is reduced, the kinetic energy of the water flow can be converted into the potential energy of the flow guide blades, the rotation of the flow guide blades can drive the rotation of the rotating rod, the conductive plates are driven by the connecting blocks to rotate, the conductive plates are enabled to make the movement of cutting magnetic induction lines in the magnetic fields of the two permanent magnets, the conductive plates are conductive through the bottom, and the conductive plates can conveniently transfer electricity to the cylindrical contacts and the servo force sensor after the power is supplied to the power through the conductive motor;
wherein pressure sensor is through the pressure of response rivers to control the work of private clothes motor, will make two relative motions of blocking the piece through the double-end threaded rod promptly when servo motor during operation, then open the second water conservancy diversion mouth, thereby realize reposition of redundant personnel with the rivers in the transition chamber, then reduce the water pressure of rivers, secondly, the rivers that come out from the second water conservancy diversion mouth form the hedging with the rivers that the second intercommunication chamber comes out, then reduce the potential energy of rivers through the hedging, thereby reduce the water pressure of rivers again.
The beneficial effects of the invention are as follows:
the invention primarily realizes the water pressure of controlling the water flow by controlling the opening and closing of the first diversion opening, simultaneously, the water pressure of the water flow can be reduced again by the arrangement of the diversion blades, and the power generation device can provide kinetic energy for the pressure sensor and the servo motor at the later time by the arrangement of the rotating rod, so that the opening and closing of the second diversion opening are controlled, and the water pressure of the water flow is reduced again by diversion and opposite flushing.
Drawings
FIG. 1 is a schematic diagram of a first configuration of an intelligent regulator for pressure of a pressure reducing valve according to the present invention;
FIG. 2 is an enlarged view of FIG. 1 at A;
FIG. 3 is a schematic diagram of a second configuration of the intelligent regulator according to the present invention;
fig. 4 is a schematic structural diagram of a third use state of the intelligent pressure regulator for the pressure reducing valve.
In the figure: the valve comprises a valve body 1, a water inlet 2, a water outlet 3, a first communication cavity 4, a transition cavity 5, a second communication cavity 6, a movable flow baffle 7, an overflow port 8, a first flow guide port 9, a second flow guide port 10, an installation cavity 11, a permanent magnet 12, a conductive plate 13, a connecting block 14, a contact disc 15, a servo motor 16, a double-head threaded rod 17, a blocking block 18, a rotating rod 19, a flow guide vane 20, a pressure sensor 21 and a connecting flange 22.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Referring to fig. 1-2, an intelligent pressure reducing valve pressure regulating device comprises a valve body 1, wherein a water inlet 2 and a water outlet 3 are arranged on the valve body 1, the water inlet 2 and the water outlet 3 of the valve body 1 are fixedly connected with a connecting flange 22, a pressure sensor 21 is arranged in the connecting flange 22 positioned on the water outlet 3, the pressure sensor 21 is connected with the inner side wall of the connecting flange 22 through a connecting shaft, so that the valve body 1 is convenient to be connected with an external water inlet pipe and an external water outlet pipe through the arrangement of the connecting flange 22, a first communication cavity 4, a transition cavity 5 and a second communication cavity 6 are sequentially communicated with the valve body 1 from bottom to top, the water inlet 2 is communicated with the first communication cavity 4, and the water outlet 3 is communicated with the second communication cavity 6;
the inner side wall of the first communication cavity 4 is connected with the same movable flow baffle 7 through a plurality of springs, the outer side wall of the movable flow baffle 7 is provided with a sealing rubber layer, the sealing rubber layer is in contact with the inner side wall of the first communication cavity 4, the sealing property of the movable flow baffle 7 when sliding up and down in the first communication cavity 4 is ensured through the arrangement of the sealing rubber layer, a plurality of overflow ports 8 for water outflow are arranged on the movable flow baffle 7, a power generation device is arranged in the movable flow baffle 7, two sides of the inner side wall of the first communication cavity 4 are communicated with the transition cavity 5 through first flow guide ports 9, and the first flow guide ports 9 are blocked by the movable flow baffle 7 in an initial state;
it should be noted that: the electricity generating device comprises an installation cavity 11 arranged in a movable spoiler 7, permanent magnets 12 are fixedly connected to the inner walls of two sides of the installation cavity 11, magnetism of one side opposite to the two permanent magnets 12 is opposite, a conductive plate 13 is arranged between the two permanent magnets 12, an insulating prismatic connecting block 14 is arranged above the conductive plate 13, a conductive cylinder is arranged at the lower end of the conductive plate 13, a contact disc 15 in contact with the conductive cylinder is arranged in the installation cavity 11, the movement of cutting magnetic induction lines is carried out under the action of magnetic fields generated by the two permanent magnets 12 through the conductive plate 13, current is produced, then the current is supplied to a pressure sensor 21 and a servo motor 16 later, namely, the current generated on the conductive plate 13 is led into the contact disc 15 through the conductive cylinder, the contact disc 15 is electrically connected with the pressure sensor 21 and the servo motor 16 through wires, the pressure sensor 21 and the servo motor 16 are controlled through a controller, the electrical connection and the electrical control of the controller and the servo motor 16 are all in the prior art, and details are not repeated.
Wherein, both sides of the inner side wall of the transition cavity 5 are communicated with the water outlet 3 through the second diversion port 10, and the inlet of the second diversion port 10 positioned on the side wall of the transition cavity 5 is provided with a pre-diversion device;
further, the pre-diversion device comprises a servo motor 16 fixedly connected to the outer side wall of the valve body 1, the output end of the servo motor 16 is fixedly connected with a double-head threaded rod 17, the outer side wall of the double-head threaded rod 17 is in threaded connection with two blocking blocks 18 which are symmetrically arranged, the blocking blocks 18 are located at the inlet end of the second diversion opening 10, the cross section of each blocking block 18 is in a right-angled triangle shape, the blocking blocks 18 move relatively under the action of the servo motor 16, the second diversion opening 10 is opened, water flow enters the water outlet 3 through the second diversion opening 10, and because the second diversion opening 10 is obliquely arranged, water flow coming out of the second diversion opening 10 and water flow coming out of the second communication cavity 6 form opposite flushing, potential energy of the water flow is reduced through opposite flushing, and therefore water pressure of the water flow is reduced again.
Wherein, a pressure reducing device for reducing the water pressure is arranged in the second communication cavity 6;
further, the pressure reducing device comprises a fixed block fixedly connected to the inner side wall of the second communication cavity 6, the fixed block is rotationally connected with a rotating rod 19, the top of the rotating rod 19 is fixedly connected with a plurality of guide vanes 20, the bottom of the rotating rod 19 penetrates through the movable spoiler 7 and extends into the installation cavity 11, the rotating rod 19 is rotationally connected with the movable spoiler 7, a sliding chute for connecting the connecting block 14 is arranged at the bottom of the rotating rod 19, and therefore water flow upwards water potential can be reduced through the arrangement of the guide vanes 20 in the pressure reducing device, namely, part of water flow upwards is dispersed into horizontal water potential, so that water pressure of upwards water flow is reduced, kinetic energy of water flow can be converted into potential energy of rotation of the guide vanes 20, rotation of the guide vanes 20 can drive rotation of the rotating rod 19, and the electricity generating device after driving works.
The application method of the intelligent pressure regulating device of the pressure reducing valve comprises the following steps:
s1, connecting the valve body 1 with an external water inlet pipe and an external water outlet pipe through a connecting flange 22, so as to realize the communication between the valve body 1 and the external water inlet pipe and the external water outlet pipe;
s2, referring to the first use state of FIG. 1, when the water flow rate is small, water enters the water inlet from the external water inlet pipe and enters the transition cavity 5 from the overflow port 8 of the movable spoiler 7 in the first communication cavity 4, so that the water flows outwards from the water outlet through the second communication cavity 6;
referring to the second use state of fig. 3, when the water flow is large, the water flow cannot enter the transition cavity 5 from the overflow port 8 of the movable flow baffle 7 in the first communication cavity 4, so that the residual water flow which does not pass through can form large water pressure at the bottom of the movable flow baffle 7, and when the water pressure is larger than the elastic potential energy of the spring, the movable flow baffle 7 moves upwards under the action of the water pressure, at the moment, the first flow guide ports 9 at two sides of the movable flow baffle 7 are opened, the water body can enter the transition cavity 5 from the first flow guide ports 9, the water pressure of the water flow is reduced in a water flow dispersing manner, and the water flow entering the transition cavity 5 enters the water outlet through the second communication cavity 6, the water flow upward water potential can be reduced through the arrangement of the guide vanes 20, namely, part of upward water potential is dispersed into horizontal water potential, so that the water pressure of upward water flow is reduced, wherein the kinetic energy of water flow can be converted into the potential energy of rotation of the guide vanes 20, the rotation of the guide vanes 20 can drive the rotation of the rotating rod 19, so that the connecting block 14 drives the conductive plate 13 to rotate, the conductive plate 13 makes movement of cutting magnetic induction lines in the magnetic fields of the two permanent magnets 12, and the conductive plate 13 is conductive, and the conductive plate 13 is electrically transmitted to the contact disc 15 through a conductive cylinder at the bottom, so that the subsequent servo motor 16 and the pressure sensor 21 can be conveniently supplied with power;
referring to fig. 4, in a third use state, the pressure sensor 21 senses the pressure of water flow, so as to control the operation of the private clothes motor 16, that is, when the servo motor 16 works, the two blocking blocks 18 move relatively through the double-head threaded rod 17, the second diversion port 10 is opened, so that the water flow in the transition cavity 5 is split, the water pressure of the water flow is reduced, secondly, the water flow coming out of the second diversion port 10 and the water flow coming out of the second communication cavity 6 form opposite flushing, and the potential energy of the water flow is reduced through opposite flushing, so that the water pressure of the water flow is reduced again.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.

Claims (4)

1. The intelligent pressure regulating device for the pressure reducing valve is characterized by comprising a valve body (1), wherein a water inlet (2) and a water outlet (3) are formed in the valve body (1), a first communication cavity (4), a transition cavity (5) and a second communication cavity (6) are sequentially communicated with each other from bottom to top, the water inlet (2) is communicated with the first communication cavity (4), and the water outlet (3) is communicated with the second communication cavity (6);
the novel water heater is characterized in that the inner side wall of the first communication cavity (4) is connected with the same movable spoiler (7) through a plurality of springs, a plurality of overflow ports (8) for water outflow are formed in the movable spoiler (7), a power generation device is arranged in the movable spoiler (7), the power generation device comprises a mounting cavity (11) arranged in the movable spoiler (7), permanent magnets (12) are fixedly connected to the inner walls of the two sides of the mounting cavity (11), the opposite magnetic properties of the two permanent magnets (12) are opposite, a conductive plate (13) is arranged between the two permanent magnets (12), an insulating prismatic connecting block (14) is arranged above the conductive plate (13), conductive cylinders are arranged at the lower end of the conductive plate (13), contact disks (15) in contact with the conductive cylinders are arranged in the mounting cavity (11), the two sides of the inner side wall of the first communication cavity (4) are communicated with the transition cavity (5) through first conductive plates (9), and the first conductive plates (9) are blocked in the initial state;
both sides of the inner side wall of the transition cavity (5) are communicated with the water outlet (3) through a second diversion port (10), a pre-diversion device is arranged at the inlet of the second diversion port (10) on the side wall of the transition cavity (5), the pre-diversion device comprises a servo motor (16) fixedly connected to the outer side wall of the valve body (1), the output end of the servo motor (16) is fixedly connected with a double-head threaded rod (17), two blocking blocks (18) which are symmetrically arranged are connected with the outer side wall of the double-head threaded rod (17) in a threaded manner, the blocking blocks (18) are positioned at the inlet end of the second diversion port (10), and the cross section of each blocking block (18) is in a right triangle shape;
the water inlet (2) and the water outlet (3) of the valve body (1) are fixedly connected with a connecting flange (22), a pressure sensor (21) is arranged in the connecting flange (22) on the water outlet (3), and the pressure sensor (21) is connected with the inner side wall of the connecting flange (22) through a connecting shaft;
the contact disc (15) is electrically connected with the pressure sensor (21) and the servo motor (16) through leads;
a pressure reducing device for reducing water pressure is arranged in the second communication cavity (6).
2. The intelligent pressure regulating device for the pressure reducing valve according to claim 1, wherein a sealing rubber layer is arranged on the outer side wall of the movable flow blocking plate (7), and the sealing rubber layer is in contact with the inner side wall of the first communication cavity (4).
3. The intelligent pressure reducing valve pressure adjusting device according to claim 1, wherein the pressure reducing device comprises a fixed block fixedly connected to the inner side wall of the second communication cavity (6), a rotating rod (19) is rotatably connected to the fixed block, a plurality of guide vanes (20) are fixedly connected to the top of the rotating rod (19), the bottom of the rotating rod (19) penetrates through the movable spoiler (7) and extends into the installation cavity (11), the rotating rod (19) is rotatably connected with the movable spoiler (7), and a sliding groove for sliding the connecting block (14) is formed in the bottom of the rotating rod (19).
4. A method for an intelligent pressure regulating device of a pressure reducing valve is characterized by comprising the following steps of: the method comprises the following steps:
s1, connecting a valve body with an external water inlet pipe and an external water outlet pipe through a connecting flange, so as to realize the communication between the valve body and the external water inlet pipe and the external water outlet pipe;
s2, when the water flow is small, water enters the water inlet from the external water inlet pipe and enters the transition cavity from the overflow port of the movable spoiler in the first communication cavity, so that the water flows outwards from the water outlet through the second communication cavity;
when the water flow is large, the water flow cannot enter the transition cavity from the overflow port of the movable flow baffle in the first communication cavity, the residual water flow which does not pass through can form large water pressure at the bottom of the movable flow baffle, when the water pressure is larger than the elastic potential energy of the spring, the movable flow baffle moves upwards under the action of the water pressure, at the moment, the first flow guide ports on the two sides of the movable flow baffle are opened, the water body can enter the transition cavity from the first flow guide ports, the water pressure of the water flow is reduced in a water flow dispersing mode, the water flow in the transition cavity enters the water outlet through the second communication cavity, the water flow upward water potential can be reduced through the arrangement of the flow guide blades, namely, part of the upward water potential is dispersed into horizontal water potential, so that the water pressure of the upward water flow is reduced, the kinetic energy of the water flow can be converted into the potential energy of the flow guide blades, the rotation of the flow guide blades can drive the rotation of the rotating rod, the conductive plates are driven by the connecting blocks to rotate, the conductive plates are enabled to make the movement of cutting magnetic induction lines in the magnetic fields of the two permanent magnets, the conductive plates are conductive through the bottom, and the conductive plates can conveniently transfer electricity to the cylindrical contacts and the servo force sensor after the power is supplied to the power through the conductive motor;
wherein pressure sensor is through the pressure of response rivers to control the work of private clothes motor, will make two relative motions of blocking the piece through the double-end threaded rod promptly when servo motor during operation, then open the second water conservancy diversion mouth, thereby realize reposition of redundant personnel with the rivers in the transition chamber, then reduce the water pressure of rivers, secondly, the rivers that come out from the second water conservancy diversion mouth form the hedging with the rivers that the second intercommunication chamber comes out, then reduce the potential energy of rivers through the hedging, thereby reduce the water pressure of rivers again.
CN201911402876.8A 2019-12-31 2019-12-31 Pressure intelligent regulating device and method for pressure reducing valve Active CN110989710B (en)

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CN201911402876.8A CN110989710B (en) 2019-12-31 2019-12-31 Pressure intelligent regulating device and method for pressure reducing valve

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CN201911402876.8A CN110989710B (en) 2019-12-31 2019-12-31 Pressure intelligent regulating device and method for pressure reducing valve

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CN110989710B true CN110989710B (en) 2023-06-20

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Publication number Priority date Publication date Assignee Title
CN113213561B (en) * 2021-03-24 2022-11-15 深圳市芊毅信息科技有限公司 Voltage stabilizing protection tube for intelligent water purifier and application thereof
CN114251513B (en) * 2021-12-24 2024-04-09 苏州阀医生流体控制技术有限公司 Pressure reducing valve

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CN203516889U (en) * 2013-11-14 2014-04-02 黄燕民 Novel pressure reducing valve
CN204153254U (en) * 2014-10-10 2015-02-11 李明玉 A kind of pressure regulator containing single spring structure
CN105840886A (en) * 2016-06-07 2016-08-10 镇江闽乐建材有限公司 Novel one-way valve
CN107345585A (en) * 2016-05-06 2017-11-14 青岛经济技术开发区海尔热水器有限公司 A kind of pressure-reducing valve and water heater
CN110513520A (en) * 2019-08-15 2019-11-29 邵金国 A kind of buffering filtering type pressure reducing valve

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US6640830B2 (en) * 2001-12-12 2003-11-04 Sun Hydraulics Corp. Pilot operated pressure valve
IT1390605B1 (en) * 2008-07-08 2011-09-09 Oleostar S P A HYDRAULIC PRESSURE LIMITING VALVE WITH PROGRESSIVE INTERVENTION FOR THE CONTROL OF HYDRAULIC MOTORS

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203516889U (en) * 2013-11-14 2014-04-02 黄燕民 Novel pressure reducing valve
CN204153254U (en) * 2014-10-10 2015-02-11 李明玉 A kind of pressure regulator containing single spring structure
CN107345585A (en) * 2016-05-06 2017-11-14 青岛经济技术开发区海尔热水器有限公司 A kind of pressure-reducing valve and water heater
CN105840886A (en) * 2016-06-07 2016-08-10 镇江闽乐建材有限公司 Novel one-way valve
CN110513520A (en) * 2019-08-15 2019-11-29 邵金国 A kind of buffering filtering type pressure reducing valve

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