CN112460279A - Self-feedback flow steady and constant regulating valve - Google Patents

Self-feedback flow steady and constant regulating valve Download PDF

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Publication number
CN112460279A
CN112460279A CN202011333406.3A CN202011333406A CN112460279A CN 112460279 A CN112460279 A CN 112460279A CN 202011333406 A CN202011333406 A CN 202011333406A CN 112460279 A CN112460279 A CN 112460279A
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shell
valve
regulating valve
valve core
self
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CN202011333406.3A
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CN112460279B (en
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王宇
周鉴琪
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Suzhou Delan Energy Science & Technology Corp ltd
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Suzhou Delan Energy Science & Technology Corp ltd
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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
    • 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
    • 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
    • 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
    • F16K31/44—Mechanical actuating means
    • F16K31/60—Handles

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Driven Valves (AREA)
  • Safety Valves (AREA)

Abstract

The invention discloses a self-feedback flow steady and constant regulating valve, which belongs to the technical field of valve production and comprises a shell and a knob positioned above the shell, wherein a spring is arranged in the knob, a valve rod, a flow limiting valve core and a regulating valve core are arranged in the shell, the valve rod and the flow limiting valve core are fixedly connected, an elastic diaphragm is connected and arranged on the regulating valve core and the shell, when fluid flows into the regulating valve, certain pressure can be generated on the elastic diaphragm, a group of counter forces are generated between the pressure received by the elastic diaphragm and the elastic force of the spring, and the group of counter forces can drive the elastic diaphragm to drive the regulating valve core to move up and down to realize the regulation of the size of a flow limiting window, so that the. The self-feedback regulating valve can realize self-feedback in the working process, can realize the regulation of flow without depending on an external control program, and is convenient to use and high in sensitivity.

Description

Self-feedback flow steady and constant regulating valve
Technical Field
The invention belongs to the technical field of valve production, and particularly relates to a self-feedback flow steady and constant regulating valve.
Background
In an industrial production process, when fluid needs to be conveyed, in order to achieve flow control of the fluid, a regulating valve is usually arranged in a fluid conveying pipeline, the fluid firstly enters an inlet of the regulating valve, passes through a valve core of the regulating valve after entering the regulating valve, and then flows out, and the position of the valve core of the regulating valve is regulated in the process, so that the function of regulating the flow can be achieved.
The position of a valve core of a traditional regulating valve needs to be manually regulated, once the position of the valve core is determined, a fluid outflow window of the regulating valve is fixed, and the flow of fluid flowing through the regulating valve is influenced if the inflow pressure of the fluid changes in the fluid conveying process, so that the function of regulating and controlling the flow of the fluid cannot be realized.
The traditional regulating valve is improved, the valve core can be connected with an intelligent control system, the position of the valve core is regulated through the intelligent control system, the intelligent control system can be controlled by an electric actuator, a pneumatic actuator or other software programs, the control system is complex in design and needs external equipment, so that the cost of the equipment is high, and the control precision of the regulating valve can be reduced after a series of feedback.
For example, in chinese patent application CN102162539A (multifunctional constant flow rate regulating valve), a valve sleeve, a differential pressure sensor, and a double-seat valve flap for compensating differential pressure are installed in a valve body of the regulating valve, and the double-seat valve flap functions as a valve core. However, the regulation sensitivity of the regulating valve in the patent application is controlled by the sensitivity of the differential pressure sensor, and an external signal collecting device is needed to realize the purpose of flow regulation, so that the use is not convenient enough. As in CN202302166U (a constant flow rate regulating valve), a manual regulating valve and a through-flow hole are provided in the regulating valve, a shaft lever, a valve plate and an adjusting plate are provided in the valve housing, and the valve plate and the adjusting plate are sleeved on the shaft lever; the governing valve passes through combination formula mechanical structure, utilizes gravity to realize flow control, adjusts the flow area under the effect of fluid power, dead weight and regulating plate gravity, and the fluid air current that flows into the valve is to the ascending effort of valve plate, and then adjusts effective flow area's size. The governing valve in this patent is influenced by the valve dead weight greatly, consequently regulates and control the precision lower, consequently more is fit for the circulation of large-traffic fluidic, and when the flow is less, is difficult to overcome regulating plate gravity, just can't realize the purpose of flow regulation and control, and application range is narrower.
Therefore, the self-feedback flow steady and constant regulating valve is designed, the position of the valve core can be adjusted according to the condition that fluid flows through the inside of the regulating valve, the flow area is further regulated, the regulating valve with high regulating precision is regulated, and the self-feedback flow steady and constant regulating valve has positive practical significance.
Disclosure of Invention
The invention aims to solve the technical problems that the constant flow regulating valve in the prior art needs to realize flow regulation by means of an external control means, has low regulating precision and the like.
In order to solve the technical problem, the invention discloses a self-feedback flow steady and constant regulating valve which comprises a shell and a knob positioned above the shell, wherein the knob is of a hollow structure and comprises a shell and a knob base positioned at the bottom in the shell,
a spring is arranged in the hollow structure of the knob, two ends of the spring are respectively connected with the shell and the knob base,
a valve rod is arranged on the other side surface of the knob base opposite to the side surface connected with the spring, and the valve rod extends into the shell;
a valve rod hole is formed in the center of the shell, the valve rod is positioned in the valve rod hole, an adjusting valve core and a flow limiting valve core are sequentially sleeved in the valve rod hole, and the flow limiting valve core is fixedly connected with the bottom of the valve rod;
a fluid inflow port is formed in the bottom of the side edge of the shell, a fluid outflow port is formed in the top of the other side edge of the shell, the fluid inflow port is communicated with the bottom of the valve rod hole, the fluid outflow port is communicated with the top of the valve rod hole, a throttling sleeve is sleeved on the top of the valve rod hole, a throttling sleeve round hole is formed in the throttling sleeve in the radial direction and communicated with the fluid outflow port, and the inner wall of the throttling sleeve is in contact with the outer wall of the adjusting valve core;
and an elastic diaphragm is arranged in the valve rod hole and connected with the inside of the shell and the outer wall of the adjusting valve core.
The elastic membrane can be made of rubber or stainless steel, and rubber is preferred because rubber has better elasticity and more sensitive reaction.
Furthermore, a guide screw is arranged on the side wall of the knob base, a guide rail is arranged on the side wall of the knob shell in the direction perpendicular to the knob base, the head of the guide screw is positioned in the guide rail, and the guide screw can move along the guide rail.
Furthermore, the bottom of the adjusting valve core is provided with a guide post, correspondingly, a guide groove is arranged on the inner wall of the shell at a position corresponding to the guide post, the guide post is positioned in the guide groove, and the guide post can axially move along the guide groove.
Further, the shell comprises an upper shell and a lower shell, and the upper shell and the lower shell are fixedly connected together; one end of the elastic diaphragm is fixedly connected to the outer side wall of the adjusting valve core through a bolt, and the other end of the elastic diaphragm is connected to the position where the upper shell and the lower shell are connected.
Furthermore, an outer edge is arranged on the outer wall of the adjusting valve core, the elastic diaphragm is of a circular ring structure, the inner wall of the circular ring of the elastic diaphragm is fixed on the outer edge through a bolt, and a gasket is arranged between the head of the bolt and the elastic diaphragm.
Furthermore, the outer wall of the ring, connected with the shell, of the elastic diaphragm is provided with a diaphragm end protrusion, the lower shell is provided with a groove at the position where the upper shell is connected with the lower shell, the diaphragm end protrusion is buckled in the groove, and the upper shell is pressed on the diaphragm end protrusion.
Furthermore, an adjusting valve core round hole is formed in the side wall of the adjusting valve core and is located above the elastic membrane.
Furthermore, a spring seat is arranged on the knob base towards the interior of the hollow structure of the knob, and one end of the spring is fixed on the spring seat. Further, the spring is fixed to the spring seat with a fastening screw, or the spring is welded to the spring seat.
Furthermore, an O-shaped ring is arranged between the valve rod and the shell and mainly plays a role in sealing; soft valve seats are arranged at the position where the top of the throttling sleeve is contacted with the shell and the position where the regulating valve core is contacted with the shell; the soft valve seat, the regulating valve core and the flow limiting valve core are matched for use, and play a role in controlling in a fluid circulation pipeline.
The guide screw in the regulating valve mainly plays a role in limiting the movement direction of the valve rod, and when the regulating valve core moves upwards or downwards, the valve rod is also driven to move upwards or downwards so as to drive the knob base to move upwards or downwards; in this way, when the knob base moves, due to the existence of the guide screw, the guide screw can only move up and down along the guide rail, so that the axial movement of the valve rod is fixed, and the radial direction of the valve rod cannot generate position offset; similarly, the guide post arranged below the regulating valve core mainly plays a role in limiting the movement direction of the regulating valve core, and when the regulating valve core moves upwards or downwards, the guide post can only axially move along the guide groove, so that the radial direction of the guide post cannot deviate;
therefore, after the knob position of the regulating valve is determined, the valve rod, the flow limiting valve core and the regulating valve core can only do axial movement at the limited position, the radial movement of the valve rod, the flow limiting valve core and the regulating valve core is limited, namely, the radial position movement cannot occur, and therefore the valve opening and closing amount of the regulating valve is fixed in the working process of the regulating valve.
Compared with the prior art, the invention has the following advantages:
(1) the invention arranges the elastic diaphragm and the spring in the adjusting valve, and adjusts the position of the adjusting valve core in the adjusting valve by utilizing the pressure of the fluid on the elastic diaphragm and the counter force between the springs, thereby adjusting the fluid flow area, realizing the adjustment of the fluid flow through self-feedback, having no need of depending on an external control program, convenient use and high sensitivity.
(2) According to the invention, the guide screw and the guide rail are arranged in the knob, the guide post is arranged at the bottom of the regulating valve core, and the guide groove is arranged in the shell, so that the radial positions of the valve rod, the flow limiting valve core and the regulating valve core can not be deviated when the valve rod, the flow limiting valve core and the regulating valve core move axially, and the control precision is high.
(3) The regulating valve disclosed by the invention is simple in design, can be adjusted in size according to practical application occasions, and is wide in application range.
Drawings
Fig. 1 is a sectional view showing the overall structure of the self-feedback flow-rate-stabilizing regulating valve of the present invention.
Fig. 2 is an enlarged view of a partial sectional structure of the interior of the knob in the present invention.
FIG. 3 is a schematic view of the connection of the elastic diaphragm with the regulator valve and the housing according to the present invention.
Fig. 4 is a schematic structural diagram of the self-feedback flow steady and constant regulating valve in the off position.
Fig. 5 is a schematic structural diagram of the self-feedback flow-stabilizing regulating valve in a partially opened position.
Fig. 6 is a schematic structural diagram of the self-feedback flow steady and constant regulating valve in the open position.
Wherein: 1-a knob; 2-a shell; 3-a valve stem; 4-a throttling sleeve; 5-adjusting the valve core; 6-a flow limiting valve core; 7-an elastic membrane; 11-a guide rail; 12-a guide screw; 13-a spring; 14-a knob base; 15-a housing; 131-a fastening screw; 132-a spring seat; 21-an upper shell; 22-a lower housing; 23-O-ring; 24-soft valve seat; 25-a fluid flow inlet; 26-a fluid outflow; 221-a guide groove; 41-a throttling sleeve round hole; 51-a guide post; 52-adjusting the valve core circular hole; 53-outer edge; 71-membrane end protrusion; 72-a gasket; 73-diaphragm connecting bolt.
Detailed Description
The technical solution of the present invention will be described in detail by the following specific examples.
Example one
Fig. 1 to 3 are schematic diagrams illustrating an overall structure and a local connection structure of the self-feedback flow-stabilizing regulating valve in this embodiment.
The self-feedback flow steady and constant regulating valve comprises a shell 2 and a knob 1 positioned above the shell 2, wherein the knob 1 is of a hollow structure, the knob 1 comprises a shell and a knob base 14 positioned at the bottom in the shell, a spring 13 is arranged in the hollow structure of the knob 1, two ends of the spring 13 are respectively connected with the shell and the knob base 14, a valve rod 3 is arranged on the other side surface, opposite to the side surface connected with the spring 13, of the knob base 14, and the valve rod 3 extends into the shell 2;
a spring seat 132 is provided on the knob base 14 toward the inside of the hollow structure of the knob, and one end of the spring 13 is fixed to the spring seat 132 by a fastening screw 131.
A valve rod hole is formed in the center of the shell 2, the valve rod 3 is positioned in the valve rod hole, an adjusting valve core 5 and a flow limiting valve core 6 are sequentially sleeved in the valve rod hole, and the flow limiting valve core 5 is fixedly connected with the bottom of the valve rod 3; specifically, the flow limiting valve core 5 is welded at the bottom of the valve rod 3, and the valve rod 3 and the flow limiting valve core 5 are integrated in the working process of the regulating valve.
A fluid inlet 25 is arranged at the bottom of the side edge of the shell 2, a fluid outlet 26 is arranged at the top of the other side edge of the shell 2, the fluid inlet 25 is communicated with the bottom of the valve rod hole, the fluid outlet 26 is communicated with the top of the valve rod hole, a throttling sleeve 4 is sleeved at the top of the valve rod hole, throttling sleeve round holes 41 are arranged in the radial direction of the throttling sleeve 4, the throttling sleeve round holes 41 are communicated with the fluid outlet 26, and the throttling sleeve round holes 41 are uniformly distributed along the radial direction of the throttling sleeve 4; the inner wall of the throttling sleeve 4 is contacted with the outer wall of the regulating valve core 5;
an elastic diaphragm 7 is arranged in the valve rod hole and connected with the inner part of the shell 2 and the outer wall of the adjusting valve core 5. The elastic membrane 7 is made of rubber. During the working process of the regulating valve, the elastic membrane 7 can deform upwards or downwards to drive the regulating valve core 5 to move upwards or downwards.
The flow direction of the fluid in the regulator valve is shown by the arrows in fig. 1, and the fluid enters through the inlet port 25, enters the inside of the restrictor spool 6 and the regulator spool 5, and the inside of the throttle sleeve 4, and flows out through the throttle sleeve circular hole 41, and finally flows out through the outlet port 26.
The side wall of the knob base 14 is provided with a guide screw 12, the side wall of the knob shell is provided with a guide rail 11 in the direction perpendicular to the knob base 14, the head of the guide screw 12 is positioned in the guide rail 11, and the guide screw 14 can move up and down along the guide rail 11. The guide screw 12 can limit the radial movement of the valve rod 3, so that the valve rod can only move in the axial direction in the working process of the regulating valve;
a guide post 51 is arranged at the bottom of the regulating valve core 5, correspondingly, a guide groove 221 is arranged on the inner wall of the shell 2 at a position corresponding to the guide post 51, the guide post 51 is positioned in the guide groove 221, and the guide post 51 can move axially along the guide groove 221. The guide post 51 can limit the radial movement of the regulating valve core 5, so that the regulating valve core can only move in the axial direction during the working process of the regulating valve;
therefore, when the position of the knob 1 is determined, the valve rod 3, the flow limiting valve core 6 and the regulating valve core 5 can only do axial movement at a limited position, the radial movement of the valve rod is limited, namely, the radial position movement cannot occur, and therefore, the valve opening and closing amount of the regulating valve is fixed in the working process of the regulating valve.
The shell 2 comprises an upper shell 21 and a lower shell 22, and the upper shell 21 and the lower shell 22 are fixedly connected together; one end of the elastic diaphragm 7 is fixedly connected to the outer side wall of the regulating valve core 5 through a bolt, and the other end of the elastic diaphragm 5 is connected to the position where the upper shell 21 and the lower shell 22 are connected.
Specifically, an outer edge 53 is arranged on the outer wall of the adjusting valve core 5, the elastic membrane 7 is of a circular ring structure and is sleeved on the outer wall of the adjusting valve core 5, the inner wall of the circular ring of the elastic membrane 7 is fixed on the outer edge 53 through a bolt, and a gasket 72 is arranged between the head of the bolt and the elastic membrane 7. The circular outer wall of the elastic diaphragm 7 connected with the shell 2 is provided with a diaphragm end part bulge 71, the lower shell 22 is provided with a groove at the position where the upper shell 21 is connected with the lower shell 22, the diaphragm end part bulge 71 is buckled in the groove, and the upper shell 21 is pressed on the diaphragm end part bulge 71, so that the elastic diaphragm 7 is fixedly connected on the shell 2.
An adjusting valve core round hole 52 is arranged on the side wall of the adjusting valve core 5, and the adjusting valve core round hole 52 is positioned above the elastic diaphragm 7. The number of the regulating valve core circular holes 52 is multiple and is uniformly distributed along the radial direction of the regulating valve core 5.
Meanwhile, an O-shaped ring 23 is arranged between the valve rod 3 and the shell 2; soft valve seats 24 are provided at the position where the top of the throttle sleeve 4 contacts the housing 2 and at the position where the regulator valve spool 5 contacts the housing 2.
As shown in fig. 4-6, the working state diagram of the regulating valve of the present invention is: by rotating the knob 1, the knob 1 drives the valve rod 3 to rotate, the valve rod 3 drives the flow limiting valve core 6 to rotate, the flow limiting valve core 6 moves relative to the adjusting valve core 5, when the positions of the flow limiting valve core 6 and the adjusting valve core 5 are completely opposite, no gap exists between the flow limiting valve core 6 and the adjusting valve core 5, namely, a flow limiting window is closed, the fluid inflow port 25 is not communicated with the inside of the adjusting valve, and the adjusting valve is in a closed position at the moment, as shown in fig. 4; continuing to rotate the knob 1, the valve rod 3 drives the flow-limiting valve core 6 to rotate relative to the adjusting valve core 5, when the position of the flow-limiting valve core 6 is partially opposite to that of the adjusting valve core 5, a partial gap is formed between the flow-limiting valve core 6 and the adjusting valve core 5, namely the size of a flow-limiting window is between the two, the fluid inflow port 25 is communicated with the inner part of the adjusting valve, and the adjusting valve is partially opened at the moment, as shown in fig. 5; when the knob 1 is continuously rotated, the valve rod 3 drives the flow limiting valve core 6 to rotate relative to the adjusting valve core 5, when the positions of the flow limiting valve core 6 and the adjusting valve core 5 are overlapped, the gap between the flow limiting valve core 6 and the adjusting valve core 5 is the largest, namely, the flow limiting window is the largest, the fluid inlet 25 is completely communicated with the inside of the adjusting valve, and the adjusting valve is in a full-open position at the moment, as shown in fig. 6. The overall structural section of the regulating valve given in fig. 1 is also a structural schematic diagram of the regulating valve in the fully open position.
In the using process of the regulating valve, the size of a flow limiting window is set through a knob 1, firstly, the knob 1 is rotated according to actual needs to regulate the size of the flow limiting window between a flow limiting valve core 6 and a regulating valve core 5, and the size of the flow limiting window is changed along with the change of the rotating position of the knob 1; the position of the rear restriction window is not moved after setting, and therefore the flow coefficient is not changed after the restriction window is set.
According to the content of IEC60534 and the national standard GB/T17213, the flow coefficient of the fluid medium can be determined by the following formula (1):
Figure BDA0002796452430000071
wherein C is the flow coefficient and Q is the fluid flow (m)3H), ρ is the relative density of the fluid medium (relative to the density of water in the standard state), Δ P is the regulating valveThe difference in pressure before and after the valve element.
Hereinafter, PinPressure of fluid flowing into the regulating valve, PcontrolPressure of fluid after passing elastic diaphragm 7, PoutThe pressure at which the fluid exits the regulator valve, as shown in fig. 1.
The regulating valve is installed in a flow passage with fluid pressure difference, delta P ═ Pin-PcontrolWhich is multiplied by the effective area a of the elastic diaphragm 7, i.e. F ═ axΔ P', this force F generates a balanced reaction force with the force provided by the spring 13.
When the front and rear pressures of the regulating valve are stable, the flow coefficient C does not change because the overall state of the regulating valve does not change, and it is obvious that the flow Q does not change. When the pressure difference delta P between the front and the back of the regulating valve is Pin-PoutIf the valve is not actuated during the change, the change will result in Δ P ═ Pin-PcontrolThe same trend change also occurs because in formula (1), C is unchanged and Q necessarily has the same trend change as Δ P.
When the differential pressure Δ P becomes large, Δ P 'also becomes large, and F ═ axΔ P' becomes large, and this acting force F breaks the balance with the spring force, and the regulator spool 5 moves upward, so that the throttle area between the regulator spool 5 and the throttle sleeve 4 becomes small, and the corresponding overall flow coefficient C also becomes small. Conversely, the regulating valve element 5 moves downward, and the overall flow coefficient C increases accordingly. That is, the valve is capable of automatically adjusting the valve flow coefficient to regulate the flow through the regulating valve.
To illustrate how the regulating valve can stabilize a constant flow within a certain range, it can be examined how to design the flow limiting windows of the flow limiting valve core 6 and the regulating valve core 5 to ensure that the regulating valve automatically regulates the flow, because the force of the spring 13 is basically constant in the stroke range of the valve during design, and F is a × Δ P ', F and a are not changed, so Δ P ' is also not changed, that is, the valve automatically ensures Δ P ' is Pin-PcontrolThe stability of (2). Meanwhile, the flow limiting window of the valve is unchanged, namely the flow coefficient C of the flow limiting window is unchanged in automatic self-feedback regulation, and the density of the liquid medium is also unchanged in the regulation process, so that Q in the formula (1) is also unchanged, and the medium density is also unchangedThe mass flow passing through the flow-limiting window is the same as the flow passing through the inlet and the outlet of the valve, so that the regulating valve can ensure the flow to be stable and constant.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the design concept of the present invention should be included in the scope of the present invention.

Claims (10)

1. The utility model provides a steady governing valve of self-feedback flow, includes the casing and is located the knob of casing top, its characterized in that: the knob is of a hollow structure and comprises a shell and a knob base positioned at the bottom in the shell,
a spring is arranged in the hollow structure of the knob, two ends of the spring are respectively connected with the shell and the knob base,
a valve rod is arranged on the other side surface of the knob base opposite to the side surface connected with the spring, and the valve rod extends into the shell;
a valve rod hole is formed in the center of the shell, the valve rod is positioned in the valve rod hole, an adjusting valve core and a flow limiting valve core are sequentially sleeved in the valve rod hole, and the flow limiting valve core is fixedly connected with the bottom of the valve rod;
a fluid inflow port is formed in the bottom of the side edge of the shell, a fluid outflow port is formed in the top of the other side edge of the shell, the fluid inflow port is communicated with the bottom of the valve rod hole, the fluid outflow port is communicated with the top of the valve rod hole, a throttling sleeve is sleeved on the top of the valve rod hole, a throttling sleeve round hole is formed in the throttling sleeve in the radial direction and communicated with the fluid outflow port, and the inner wall of the throttling sleeve is in contact with the outer wall of the adjusting valve core;
and an elastic diaphragm is arranged in the valve rod hole and connected with the inside of the shell and the outer wall of the adjusting valve core.
2. The self-feedback flow-stabilizing regulating valve of claim 1, wherein: the side wall of the knob base is provided with a guide screw, the side wall of the knob shell is provided with a guide rail in the direction vertical to the knob base, the head of the guide screw is positioned in the guide rail, and the guide screw can move along the guide rail.
3. The self-feedback flow-stabilizing regulating valve of claim 1, wherein: the bottom of the adjusting valve core is provided with a guide post, correspondingly, a guide groove is arranged on the inner wall of the shell corresponding to the guide post, the guide post is positioned in the guide groove, and the guide post can move axially along the guide groove.
4. The self-feedback flow-stabilizing regulating valve of claim 1, wherein: the shell comprises an upper shell and a lower shell, and the upper shell and the lower shell are fixedly connected together; one end of the elastic diaphragm is fixedly connected to the outer side wall of the adjusting valve core through a bolt, and the other end of the elastic diaphragm is connected to the position where the upper shell and the lower shell are connected.
5. The self-feedback flow-stabilizing regulating valve of claim 4, wherein: the outer wall of the adjusting valve core is provided with an outer edge, the elastic diaphragm is of a circular ring structure, the inner wall of the circular ring of the elastic diaphragm is fixed on the outer edge by a bolt, and a gasket is arranged between the head of the bolt and the elastic diaphragm.
6. The self-feedback flow-stabilizing regulating valve of claim 4, wherein: the elastic diaphragm is provided with a diaphragm end protrusion on the outer wall of a circular ring connected with the shell, the lower shell is provided with a groove at the position where the upper shell is connected with the lower shell, the diaphragm end protrusion is buckled in the groove, and the upper shell is pressed on the diaphragm end protrusion.
7. The self-feedback flow-stabilizing regulating valve of claim 1, wherein: and an adjusting valve core round hole is arranged on the side wall of the adjusting valve core and is positioned above the elastic membrane.
8. The self-feedback flow-stabilizing regulating valve of claim 1, wherein: a spring seat is arranged on the knob base towards the interior of the hollow structure of the knob, and one end of the spring is fixed on the spring seat.
9. The self-feedback flow-stabilizing regulating valve of claim 8, wherein: the spring is fixed on the spring seat by a fastening screw or welded on the spring seat.
10. The self-feedback flow-stabilizing regulating valve of claim 1, wherein: an O-shaped ring is arranged between the valve rod and the shell; soft valve seats are arranged at the position where the top of the throttling sleeve is contacted with the shell and the position where the regulating valve core is contacted with the shell.
CN202011333406.3A 2020-11-25 2020-11-25 Self-feedback flow steady and constant regulating valve Active CN112460279B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011333406.3A CN112460279B (en) 2020-11-25 2020-11-25 Self-feedback flow steady and constant regulating valve

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Application Number Priority Date Filing Date Title
CN202011333406.3A CN112460279B (en) 2020-11-25 2020-11-25 Self-feedback flow steady and constant regulating valve

Publications (2)

Publication Number Publication Date
CN112460279A true CN112460279A (en) 2021-03-09
CN112460279B CN112460279B (en) 2022-04-29

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Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6725880B1 (en) * 1999-07-30 2004-04-27 Dalin Liu Constant flow control valve
US20110068284A1 (en) * 2008-05-05 2011-03-24 Frese A/S Control Valve
CN204717081U (en) * 2015-06-08 2015-10-21 宁波埃美柯铜阀门有限公司 Adjustable flow type dynamic balance valve
CN105114648A (en) * 2015-09-11 2015-12-02 重庆涪江生物科技有限公司 Flow regulating valve
CN105465435A (en) * 2014-09-03 2016-04-06 天津市卡尔斯阀门有限公司 Self-operated flow control valve
CN205745393U (en) * 2016-05-24 2016-11-30 河北惠沧节能科技有限公司 A kind of self-operated flow regulator
CN106352128A (en) * 2016-10-25 2017-01-25 浙江盾安智控科技股份有限公司 Automatic valve core component and differential pressure-independent type flow control valve
CN206860918U (en) * 2017-06-01 2018-01-09 临海市高级职业中学 A kind of self-operated flow regulator
CN207364369U (en) * 2017-10-16 2018-05-15 河北平衡阀门股份有限公司 Self-operated flow control valve
EP3376084A1 (en) * 2017-03-13 2018-09-19 Danfoss A/S Low friction valve
CN111828699A (en) * 2020-08-25 2020-10-27 航天科工火箭技术有限公司 Squirrel-cage flow regulating valve with regulating window

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6725880B1 (en) * 1999-07-30 2004-04-27 Dalin Liu Constant flow control valve
US20110068284A1 (en) * 2008-05-05 2011-03-24 Frese A/S Control Valve
CN105465435A (en) * 2014-09-03 2016-04-06 天津市卡尔斯阀门有限公司 Self-operated flow control valve
CN204717081U (en) * 2015-06-08 2015-10-21 宁波埃美柯铜阀门有限公司 Adjustable flow type dynamic balance valve
CN105114648A (en) * 2015-09-11 2015-12-02 重庆涪江生物科技有限公司 Flow regulating valve
CN205745393U (en) * 2016-05-24 2016-11-30 河北惠沧节能科技有限公司 A kind of self-operated flow regulator
CN106352128A (en) * 2016-10-25 2017-01-25 浙江盾安智控科技股份有限公司 Automatic valve core component and differential pressure-independent type flow control valve
EP3376084A1 (en) * 2017-03-13 2018-09-19 Danfoss A/S Low friction valve
CN206860918U (en) * 2017-06-01 2018-01-09 临海市高级职业中学 A kind of self-operated flow regulator
CN207364369U (en) * 2017-10-16 2018-05-15 河北平衡阀门股份有限公司 Self-operated flow control valve
CN111828699A (en) * 2020-08-25 2020-10-27 航天科工火箭技术有限公司 Squirrel-cage flow regulating valve with regulating window

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