CN111503336B - A cone-sealed self-operated flow control valve - Google Patents
A cone-sealed self-operated flow control valve Download PDFInfo
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- CN111503336B CN111503336B CN202010481787.3A CN202010481787A CN111503336B CN 111503336 B CN111503336 B CN 111503336B CN 202010481787 A CN202010481787 A CN 202010481787A CN 111503336 B CN111503336 B CN 111503336B
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- valve
- pressure chamber
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/20—Excess-flow valves
- F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
- F16K17/32—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting on a servo-mechanism or on a catch-releasing mechanism
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K35/00—Means to prevent accidental or unauthorised actuation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0008—Mechanical means
- F16K37/0016—Mechanical means having a graduated scale
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Driven Valves (AREA)
Abstract
本发明公开了一种锥体密封自力式流量控制阀，包括阀体（1），所述阀体（1）的进口出设有压力腔体P1、出口处设有压力腔体P3，所述阀体（1）的中部具有压力腔体P2，所述压力腔体P2通过两个进入水流的通口Ⅰ（13）和通口Ⅱ（14）与压力腔体P1连通，所述通口Ⅰ（13）和通口Ⅱ（14）位于同一轴线上；所述阀体（1）底部安装底盖（3），所述底盖（3）上安装膜片（4），所述膜片（4）作为压力腔体P2的下底，所述底盖（3）底面与膜片（4）下表面之间装配有弹簧（5），所述膜片（4）中央预留孔内装配阀杆（6）。本发明设计合理，实现流量的稳定控制，具有很好的实际应用及推广价值。
The present invention discloses a cone-sealed self-operated flow control valve, comprising a valve body (1), wherein the inlet of the valve body (1) is provided with a pressure chamber P1, the outlet is provided with a pressure chamber P3, the middle part of the valve body (1) is provided with a pressure chamber P2, the pressure chamber P2 is connected with the pressure chamber P1 through two ports I (13) and II (14) for entering water flow, the ports I (13) and II (14) are located on the same axis; a bottom cover (3) is installed at the bottom of the valve body (1), a diaphragm (4) is installed on the bottom cover (3), the diaphragm (4) serves as the lower bottom of the pressure chamber P2, a spring (5) is installed between the bottom surface of the bottom cover (3) and the lower surface of the diaphragm (4), and a valve stem (6) is installed in the central reserved hole of the diaphragm (4). The present invention has a reasonable design, realizes stable control of flow, and has good practical application and promotion value.
Description
Technical Field
The invention relates to the technical field of control valves, in particular to a cone sealing self-operated flow control valve applied to heating equipment.
Background
There are many self-operated flow control valves in the market at present, and the corresponding national standard (self-operated flow control valve for heating air conditioner, GB/T29735-2013) needs to be met. The valve is a control valve which can keep stable flow in the working pressure difference range by means of mechanical action without external power driving of a system. Meanwhile, the flow through the control valve can be accurately known through the flow scale displayed on the valve. Because of the two performance characteristics, the self-operated flow control valve is widely applied to hydraulic balance adjustment of an air conditioning circulation system and a heating circulation system, so that the adjustment becomes simple and convenient.
The self-operated flow control valve has two functions of flow setting and adjusting and keeping the flow constant. And the realization of the two functions is completed by two-part construction in the valve body. In terms of flow setting and adjustment, there are two main structures of valves in the market at present, one is a rotary sleeve type switch adjusting structure, the structure changes the flow by changing the flow area of the main valve body in the radial direction by means of a rotary sleeve, and as the rotary sleeve and the valve body have to have a certain gap so as to be convenient for manual operation or driven by an electric actuator, the leakage amount is inevitably increased due to the existence of the gap, so that the rotary sleeve is difficult to be completely closed. The conventional self-operated flow control valve focuses on ensuring constant medium flow, but cannot ensure complete cutting of the medium flow in a cut-off state, so that the cut-off effect cannot be achieved, and in many cases, the leakage flow is still large. This necessitates the engineering addition of a shut-off valve, which entails increased costs and installation space.
Disclosure of Invention
The invention aims to provide a cone sealing self-operated flow control valve with a novel structure, which realizes stable control and tight shutoff of flow.
The invention is realized by adopting the following technical scheme:
The cone sealing self-operated flow control valve comprises a valve body, wherein a pressure cavity P1 is arranged at an inlet of the valve body, a pressure cavity P3 is arranged at an outlet of the valve body, a pressure cavity P2 is arranged in the middle of the valve body, the pressure cavity P2 is communicated with the pressure cavity P1 through two through holes I and II for entering water flow, and the through holes I and II are positioned on the same axis; the bottom of the valve body is provided with a bottom cover, the bottom cover is provided with a diaphragm, the diaphragm is used as the lower bottom of the pressure cavity P2, a spring is arranged between the bottom surface of the bottom cover and the lower surface of the diaphragm, a valve rod is arranged in a reserved hole in the center of the diaphragm, the valve rod sequentially penetrates through a through hole I and a through hole II and then is provided with a valve rod plug I at the through hole I, a valve rod plug II is arranged at the through hole II, the valve rod plug I is positioned in the pressure cavity P1, and the valve rod plug II is positioned in the pressure cavity P2; the middle part in the valve body is provided with a static plate through a step, the static plate is used as the upper bottom of the pressure cavity P2, the static plate is provided with a conical through hole III through which water flows out, the static plate is provided with a spacer bush, the surface of the spacer bush is provided with a step hole for assembling a valve shaft, the step hole is coaxial with the conical through hole III, the shaft shoulder of the valve shaft is positioned in the step hole of the spacer bush, the top of the valve body is provided with a valve cover, the upper end of the valve shaft penetrates out of the valve cover, the lower end of the valve shaft is positioned in the spacer bush, and the valve cover is used for assembling the spacer bush and the static plate in the valve body; the thread at the bottom end of the valve shaft is provided with an upper valve plug for opening and closing the conical through hole III; two guide rods are symmetrically arranged on the side face of the upper valve plug, and the end parts of the guide rods are positioned in guide grooves on the side face of the spacer bush; a through hole IV is formed in the side surface of the spacer bush and communicated with the pressure cavity P3; the valve body is provided with a feedback hole for communicating the pressure cavity P3 with the bottom cover.
During operation, water flows into the pressure cavity P1, enters the pressure cavity P2 through the through hole I and the through hole, flows into the spacer after passing through the conical through hole III of the static plate, and flows into the pressure cavity P3 through the through hole IV until flowing out. (1) When the inlet pressure is increased, namely the pressure P 1 is increased (the pressure P 2 entering the pressure cavity P2 is increased), the water flow pressure presses down the diaphragm, and simultaneously drives the valve rod plug I and the valve rod plug II of the valve rod to move downwards, so that the opening amounts of the through hole I and the through hole II are reduced, the double valve holes are throttled simultaneously, the pressure P 2 is reduced to a design value, The pressure P 2–P3 is kept basically unchanged, so that the flow is ensured to be basically unchanged; (2) When the inlet pressure is reduced, namely P 1 is reduced (the pressure P 2 entering the pressure cavity P2 is reduced), the diaphragm drives the double valve plug of the valve rod to move upwards under the action of the spring by the diaphragm, the opening amount of the double valve hole is increased, the pressure P 2 is increased to a design value, The pressure P 2–P3 is kept basically unchanged, so that the flow is ensured to be basically unchanged; (3) When the outlet pressure P 3 is increased, the pressure P 3 of the pressure cavity P3 is transmitted into the membrane cavity of the bottom cover through the feedback hole, so that the membrane drives the double valve plugs of the valve rod to move upwards, the opening amount of the double valve holes is increased, the pressure P 2 is correspondingly increased at the same time, The pressure P 2–P3 is kept basically unchanged, so that the flow is ensured to be basically unchanged; (4) When the outlet pressure P 3 is reduced, the pressure P 3 of the pressure cavity P3 is transmitted into the membrane cavity of the bottom cover through the feedback hole, so that the membrane drives the double valve plug of the valve rod to move downwards, the opening amount of the double valve hole is reduced, the double valve hole is throttled at the same time, the pressure P 2 is correspondingly reduced at the same time, the pressure P 2–P3 is kept substantially unchanged and the flow is ensured to be substantially unchanged.
The valve is reasonable in structural design, the valve shaft is matched with the upper valve plug in a threaded manner, the upper valve plug is limited by the guide rod, the rotary motion of the valve shaft is converted into the up-down linear motion of the upper valve plug, the upper valve plug is gradually closed until the conical through hole III is completely sealed, the inclined cone type design is adopted, tightness can be ensured during closing, the blocking phenomenon cannot occur, and the valve has good practical application and popularization values.
Drawings
Fig. 1 shows a schematic structure of a control valve according to the present invention.
Fig. 2 shows a schematic view of section A-A of fig. 1.
In the figure: 1-valve body, 2-valve gap, 3-bottom, 4- (elasticity) diaphragm, 5-spring, 6-valve rod, 7-valve shaft, 8 a-spacer, 8 b-static piece, 9-upper valve plug, 10-valve rod plug I, 11-valve rod plug II, 12-guide rod, 13-through port I, 14-through port II, 15-conical through port III, 16-through port IV, 17-feedback hole, 18-temperature measuring plug, 19-rotary groove, 20-locking cap.
Detailed Description
Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
The utility model provides a cone seals self-operated flow control valve, as shown in fig. 1,2, including valve body 1, the import department of valve body 1 is equipped with pressure cavity P1 (the accent of pressure cavity P1 is as the rivers import of valve body, and have the internal thread that connects), the exit of valve body 1 is equipped with pressure cavity P3 (the accent of pressure cavity P3 is as the water egress opening, and have the external thread that connects), the middle part of valve body 1 has pressure cavity P2, as shown in fig. 1, pressure cavity P2 is the U die cavity of horizontal, pressure cavity P2 communicates with pressure cavity P1 through two through-mouths I13 and through-mouths II 14 that get into rivers, through-mouths I13 and through-mouths II 14 are located same axis.
As shown in FIG. 1, the bottom of the valve body 1 is provided with a bottom cover 3 through bolts, the bottom cover 3 is provided with a diaphragm 4, the diaphragm 4 is used as the lower bottom of the pressure cavity P2, a spring 5 is arranged between a spring mounting boss arranged on the bottom surface of the bottom cover 3 and the lower surface of the diaphragm 4, a valve rod 6 is arranged in a reserved hole in the center of the diaphragm 4 (the bottom end of the valve rod 6 stretches into the spring 5), after sequentially passing through a through hole I13 and a through hole II 14, a valve rod plug I10 is arranged at the through hole I13, a valve rod plug II 11 is arranged at the through hole II 14, the valve rod plug I10 is positioned in the pressure cavity P1, and the valve rod plug II 11 is positioned in the pressure cavity P2.
As shown in fig. 1, a static plate 8b is assembled at the middle step in the valve body 1, the static plate 8b is used as the upper bottom of the pressure cavity P2, a conical through hole iii 15 from which water flows out is formed in the static plate 8b, a spacer bush 8a is assembled on the static plate 8b, a step hole for assembling the valve shaft 7 is formed in the upper surface of the spacer bush 8a, the step hole is coaxial with the conical through hole iii 15, the shaft shoulder of the valve shaft 7 is just positioned in the step hole of the spacer bush 8a, the valve cover 2 is installed at the step at the top of the valve body 1 through bolts, the upper end of the valve shaft 7 penetrates out of the valve cover 2, a rotary groove 19 is formed at the end part of the valve shaft 7, the lower end of the valve shaft 7 is positioned in the spacer bush 8a, the spacer bush 8a and the static plate 8b are tightly assembled on the middle step of the valve body 1 by the valve cover 2, and a locking cover 20 is arranged outside the valve cover 2.
As shown in fig. 1, the bottom end of the valve shaft 7 is provided with an upper valve plug 9 for opening and closing the conical through hole iii 15 through threads, and the diameter of the upper valve plug 9 is larger than or equal to the minimum diameter of the orifice of the conical through hole iii 15, so that the closing is tight. As shown in fig. 2, two guide rods 12 are symmetrically arranged on the side surface of the upper valve plug 9, and the end parts of the guide rods 12 are positioned in the guide grooves on the side surface of the spacer bush 8a (i.e. two guide grooves are symmetrically and vertically arranged on the side surface of the spacer bush 8 a); the side surface of the spacer bush 8a is provided with a through hole IV 16 communicated with the pressure cavity P3. The valve body 1 is provided with a feedback hole 17 for communicating the pressure cavity P3 with the bottom cover 3. The valve body 1 is provided with a temperature measuring plug 1 inserted into the pressure cavity P3, and the self-operated flow control valve with a temperature measuring blind pipe can measure the outlet water flow temperature of the control valve.
Through the number of turns of rotary valve axle, form fixed sectional area and rivers relation between the toper opening III on realization plug and the static piece, set for the flow that needs to control through the sectional area, keep the flow invariable the same with prior art, the valve gap surface has the flow indication calibrated scale, and the valve axle upper end is equipped with the response pointer that indicates the flow, can visual representation control valve's flow.
As shown in fig. 1, a lock cover 20 is mounted outside the valve cover 2, and can be opened by a special key, so that the independent personnel can be prevented from adjusting at will.
In specific implementation, the assembly process is as follows: the spring 5 is placed on the boss of the bottom cover 3, then the valve rod 6 is assembled on the middle reserved hole of the diaphragm 4, the distance between the conical valve rod plug I10 and the valve rod plug II 11 on the valve rod 6 is equal to the distance between the through hole I13 and the through hole II 14, and the maximum diameters of the valve rod plug I10 and the valve rod plug II 11 are basically equal to the diameters of the through hole I13 and the through hole II 14. Then, the diaphragm 4 is placed on the bottom cover 3, and after the valve rod 6 sequentially passes through the through hole I13 and the through hole II 14, the bottom cover 3 is fixed at the lower valve port of the valve body 1 through bolts, and the diaphragm 4 compresses the spring 5. Then, the static piece 8 is placed on the inner step of the valve body 1, the upper valve plug 9 is installed at the bottom end of the valve shaft 7 through threads, then the valve shaft 7 stretches into the stepped hole on the upper surface of the spacer sleeve 8a (the shaft shoulder of the valve shaft 7 is in clearance fit with the stepped hole of the spacer sleeve 8a and just fully distributed in the stepped hole), then two guide rods 12 stretch into the guide grooves on the side face of the spacer sleeve 8a and are installed in the side face threaded holes of the upper valve plug 9 through threads, then the spacer sleeve 8a is placed on the static piece 8b, the upper valve plug 9 is located right above the conical through hole III 15 of the static piece 8b, then the valve cover 2 is covered, the upper end of the valve shaft 7 penetrates out of the valve cover 2, and the valve cover 2 is pressed and fixed on the middle step of the valve body 1 through bolts in the process of fixing the valve cover 2 on the top valve port of the valve body 1. In actual manufacturing, the spacer bush 8a and the static piece 8b may be integrally formed into a static pressing piece. Finally, the valve cover 2 is covered with the locking cover 20 to be locked, and the assembly process is completed.
The cone sealing self-operated flow control valve is characterized in that: the valve body is internally provided with double valve holes (a through hole I and a through hole II), the distance between the double valve holes is the same as that of double valve rod plugs (a valve rod plug I and a valve rod plug II) on the valve rod, and the flow and the pressure of the double valve holes can be adjusted by the up-and-down movement of the double valve rod plugs; the lower end of the valve rod is connected with the diaphragm, a spring is arranged below the diaphragm, and the diaphragm drives the double valve rods of the valve rod to move up and down. The middle step in the valve body is provided with a static plate, a conical through hole III of the static plate is used as a water outflow hole of the pressure cavity P2, and a sealing part between an upper valve plug above the static plate and the conical through hole III adopts an inclined cone design, so that tightness can be ensured during closing; the upper valve plug is in threaded connection with the valve shaft, and meanwhile, a guide rod is additionally arranged on the side surface of the upper valve plug (limiting the upper valve plug to only move up and down), so that the rotary motion of the valve shaft is converted into the linear motion of the upper valve plug, and the upper valve plug is driven to move up and down through the rotation of the valve shaft; the upper valve plug moves to open or close the conical through hole III (valve). When the valve shaft is opened and closed, the valve shaft is rotated, the rotation number and the flow are in a linear relation, the flow is controllable, the flow can be controlled according to the rotation number, and the error between the flow and the scale is only +/-5%. When the rotary groove rotates the valve shaft to open and close, the torque is small, the manual opening and closing are labor-saving, and the blocking phenomenon can not be generated; if the large control valve is electrically operated, a small actuator can be used for rotating the valve shaft, so that the cost is low.
The working principle is as follows:
1. The water flow flows into the pressure cavity P1 in the arrow direction, respectively enters the pressure cavity P2 through two holes (a through hole I13 and a through hole II 14) of the double valve hole, flows into the spacer sleeve 8a after passing through the conical through hole III 15 on the static plate 8b, and flows into the pressure cavity P3 through the through hole IV until flowing out.
2. When the inlet pressure is increased, namely the pressure P 1 is increased (the pressure P 2 entering the pressure cavity P2 is increased), the water flow pressure presses the diaphragm 4, and simultaneously drives the double valve plugs (the valve rod plug I10 and the valve rod plug II 11) of the valve rod 6 to move downwards, so that the opening amount of the double valve holes (the through hole I13 and the through hole II 14) is reduced, and the double valve holes are throttled at the same time, so that the pressure P 2 is reduced to a design value, the pressure P 2–P3 is kept basically unchanged, and the flow is ensured to be basically unchanged.
3. When the inlet pressure is reduced, namely, the pressure P 1 is reduced (the pressure P 2 entering the pressure cavity P2 is reduced), the diaphragm 4 is acted by the spring 5 to enable the diaphragm 6 to drive the double valve plug of the valve rod 6 to move upwards, so that the opening amount of the double valve hole is increased, the pressure P 2 is increased to a design value, the pressure P 2–P3 is kept basically unchanged, and the flow is ensured to be basically unchanged.
4. When the outlet pressure P 3 is increased, the pressure P 3 of the pressure cavity P3 is transmitted to the membrane cavity of the bottom cover 3 through the feedback hole 17, so that the membrane 4 drives the double valve plugs of the valve rod 6 to move upwards, the opening amount of the double valve holes is increased, the pressure P 2 is correspondingly increased at the same time, the pressure P 2–P3 is kept basically unchanged, and the flow is ensured to be basically unchanged.
5. When the outlet pressure P 3 is reduced, the pressure P 3 of the pressure cavity P3 is transmitted to the membrane cavity of the bottom cover 3 through the feedback hole 17, so that the membrane 4 drives the double valve plug of the valve rod 6 to move downwards, the opening amount of the double valve hole is reduced, the double valve hole is throttled simultaneously, the pressure P 2 is correspondingly reduced simultaneously, the pressure P 2–P3 is kept basically unchanged, and the flow is ensured to be basically unchanged.
The foregoing description of the embodiments of the present invention clearly and completely describes the technical solutions. It is apparent that the embodiments are only some, but not all, of the embodiments of the present invention, and that all other embodiments made by those skilled in the art without creative efforts shall fall within the protection scope of the present invention.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010481787.3A CN111503336B (en) | 2020-06-01 | 2020-06-01 | A cone-sealed self-operated flow control valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010481787.3A CN111503336B (en) | 2020-06-01 | 2020-06-01 | A cone-sealed self-operated flow control valve |
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| Publication Number | Publication Date |
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| CN111503336A CN111503336A (en) | 2020-08-07 |
| CN111503336B true CN111503336B (en) | 2024-11-26 |
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| CN202010481787.3A Active CN111503336B (en) | 2020-06-01 | 2020-06-01 | A cone-sealed self-operated flow control valve |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212273178U (en) * | 2020-06-01 | 2021-01-01 | 山西建工申华暖通设备有限公司 | A cone-sealed self-operated flow control valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101153669A (en) * | 2006-09-30 | 2008-04-02 | 刘理敏 | Signal-amplifying pilot-operated and self-operated regulator |
| CN201110411Y (en) * | 2007-11-08 | 2008-09-03 | 刘克勤 | Small membrane self-force pressure difference control valve |
| CN202074078U (en) * | 2011-06-03 | 2011-12-14 | 山西建工申华暖通设备有限公司 | Plane sealed self-operated flow control valve |
| CN204083407U (en) * | 2014-09-04 | 2015-01-07 | 王建波 | Self-operated flow control valve |
| JP6688591B2 (en) * | 2015-10-26 | 2020-04-28 | フシマン株式会社 | Self-powered regulating valve |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212273178U (en) * | 2020-06-01 | 2021-01-01 | 山西建工申华暖通设备有限公司 | A cone-sealed self-operated flow control valve |
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