阅读说明：本技术 一种锥体密封自力式流量控制阀 (Cone sealing self-operated flow control valve ) 是由 刘克勤 于 2020-06-01 设计创作，主要内容包括：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 invention discloses a cone sealing self-operated flow control valve which comprises a valve body (1), wherein an inlet of the valve body (1) is provided with a pressure cavity P1, an outlet of the valve body is provided with a pressure cavity P3, the middle part of the valve body (1) is provided with a pressure cavity P2, the pressure cavity P2 is communicated with the pressure cavity P1 through two ports I (13) and II (14) for water flow, and the ports I (13) and II (14) are positioned on the same axis; the valve is characterized in that a bottom cover (3) is arranged at the bottom of the valve body (1), a diaphragm (4) is arranged on the bottom cover (3), the diaphragm (4) serves as the lower bottom of a pressure cavity P2, a spring (5) is arranged between the bottom surface of the bottom cover (3) and the lower surface of the diaphragm (4), and a valve rod (6) is arranged in a reserved hole in the center of the diaphragm (4). The invention has reasonable design, realizes the stable control of the flow and has good practical application and popularization value.)

1. A cone seal self-operated flow control valve is characterized in that: the water-saving valve comprises a valve body (1), wherein a pressure cavity P1 is arranged at an inlet of the valve body (1), 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 (1), the pressure cavity P2 is communicated with the pressure cavity P1 through two ports I (13) and II (14) for water flow entering, and the ports I (13) and II (14) are located on the same axis; the bottom cover (3) is installed at the bottom of the valve body (1), the diaphragm (4) is installed on the bottom cover (3), the diaphragm (4) serves as the lower bottom of a pressure cavity P2, a spring (5) is installed between the bottom surface of the bottom cover (3) and the lower surface of the diaphragm (4), a valve rod (6) is installed in a reserved hole in the center of the diaphragm (4), the valve rod (6) sequentially penetrates through a port I (13) and a port II (14) and then is provided with a valve rod plug I (10) at the port I (13), a valve rod plug II (11) is arranged at the port II (14), the valve rod plug I (10) is located in the pressure cavity P1, and the valve rod plug II (11) is located in the pressure cavity P2; the valve is characterized in that a stator (8 b) is assembled in the middle of the inside of the valve body (1) through a step, the stator (8 b) serves as the upper bottom of a pressure cavity P2, a conical through hole III (15) through which water flows out is formed in the stator (8 b), a spacer sleeve (8 a) is assembled on the stator (8 b), a step hole used for assembling a valve shaft (7) is formed in the surface of the spacer sleeve (8 a), the step hole is coaxial with the conical through hole III (15), the shaft shoulder of the valve shaft (7) is located in the step hole of the spacer sleeve (8 a), a valve cover (2) is installed at the top of the valve body (1), the upper end of the valve shaft (7) penetrates through the valve cover (2), the lower end of the valve shaft is located in the spacer sleeve (8 a), and the spacer sleeve (8 a) and the stator (8 b) are assembled in the valve body (1) through the valve; an upper valve plug (9) for opening and closing a conical through hole III (15) is mounted at the bottom end of the valve shaft (7) through threads; 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 guide grooves on the side surface of the spacer sleeve (8 a); a through hole IV (16) is formed in the side surface of the spacer sleeve (8 a) and is communicated with the pressure cavity P3; and a feedback hole (17) for communicating the pressure cavity P3 with the bottom cover (3) is formed in the valve body (1).

2. The cone seal self-operated flow control valve of claim 1, wherein: the top end of the valve shaft (7) is provided with a rotary groove (19).

3. A cone seal self-operated flow control valve according to claim 1 or 2, wherein: and a locking cover (20) is arranged outside the valve cover (2).

4. The cone seal self-operated flow control valve of claim 3, wherein: and a temperature measuring plug (18) inserted into the pressure cavity P3 is arranged on the valve body (1).

5. The cone seal self-operated flow control valve of claim 1, wherein: the surface of the valve cover (2) is provided with a flow indicating dial, and the upper end of the valve shaft (7) is provided with a response pointer for indicating flow.

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

At present, a plurality of self-operated flow control valves exist in the market, and the self-operated flow control valves need to meet corresponding national standards (GB/T29735-. The valve is a control valve which does not need to be driven by external power of a system and can keep stable flow within a working pressure difference range by means of self mechanical action. Meanwhile, the flow scale displayed on the valve can be used for accurately knowing the flow passing through the control valve. Due to the two performance characteristics, the self-operated flow control valve is widely applied to hydraulic balance adjustment of an air conditioner circulating system and a heating circulating system, so that the adjustment is simple and convenient.

The self-operated flow control valve has two functions of flow setting and adjusting and flow keeping constant. And the two functions are realized by two parts in the valve body. In the aspect of flow setting and adjusting, valves with two structures are mainly on the market at present, one is a rotating sleeve type switch adjusting structure, the structure changes the flow by changing the flow area of a main valve body in the radial direction through a rotating sleeve, and the rotating sleeve and the valve body have a certain gap so as to be convenient for manual operation or driving by using an electric actuator, and the leakage amount is inevitably increased due to the existence of the gap, so that the rotating sleeve is difficult to be completely closed. The traditional self-operated flow control valve focuses on the performance of ensuring constant medium flow, but cannot ensure that the medium flow is completely cut off in a cut-off state, so that the cut-off function cannot be realized, and the leakage flow is still large under many conditions. This necessitates the addition of a shut-off valve in the engineering, which increases the cost and installation space.

Disclosure of Invention

The invention aims to provide a 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:

a 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 a pressure cavity P1 through a port I and a port II which are used for allowing water to enter, and the port I and the port II are located on the same axis; a bottom cover is arranged at the bottom of the valve body, a diaphragm is arranged on the bottom cover and serves 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, a valve rod plug I is arranged at the port I and a valve rod plug II is arranged at the port II after the valve rod sequentially penetrates through the port I and the port II, the valve rod plug I is located in the pressure cavity P1, and the valve rod plug II is located in the pressure cavity P2; the valve comprises a valve body, a valve cover, a valve shaft, a valve cover, a valve rod, a pressure cavity P2, a stator plate, a conical through hole III, a spacer bush, a stepped hole, a valve shaft and a valve cover, wherein the stator plate is assembled in the middle of the valve body through a step and serves as the upper bottom of the pressure cavity P2; an upper valve plug used for opening and closing the conical through hole III is mounted at the bottom end of the valve shaft through threads; two guide rods are symmetrically arranged on the side surface of the upper valve plug, and the end parts of the guide rods are positioned in guide grooves on the side surface of the spacer bush; a through hole IV is formed in the side face of the spacer bush and communicated with the pressure cavity P3; and a feedback hole for communicating the pressure cavity P3 with the bottom cover is formed in the valve body.

During operation, rivers flow into pressure chamber P1, get into pressure chamber P2 through opening I and opening, and in the toper opening III back of rethread still flowed into the spacer, later flow into pressure chamber P3 through opening IV, until flowing out. (1) When the inlet pressure increases, i.e. the pressureP ₁ Increase (resulting in pressure entering pressure chamber P2P ₂ Increase), rivers pressure pushes down the diaphragm, drives the II downstream of stem plug I and the stem plug of valve rod simultaneously, makes the opening volume of opening I and opening II reduce, throttles the bivalve hole simultaneously for pressureP ₂ Decreasing to the design value, the pressure is maintainedP ₂ –P ₃ The flow is basically unchanged, and the flow is ensured to be basically unchanged; (2) when the inlet pressure is reduced, i.e.P ₁ Decrease (resulting in pressure entering pressure chamber P2P ₂ Reduced) because the diaphragm is spring loaded causing the diaphragm to move the dual plugs of the valve stem upwardThe movement increases the opening amount of the double valve hole, so that the pressure is increasedP ₂ Increasing to the design value, the pressure is maintainedP ₂ –P ₃ The flow is basically unchanged, and the flow is ensured to be basically unchanged; (3) when the outlet pressure is higherP ₃ When increasing, the pressure in the pressure chamber P3P ₃ The pressure is transmitted to the film cavity of the bottom cover through the feedback hole, so that the diaphragm drives the double valve plugs of the valve rod to move upwards, the opening amount of the double valve holes is increased, and the pressure is enabled to be appliedP ₂ And also correspondingly increased, the pressure is maintainedP ₂ –P ₃ The flow is basically unchanged, and the flow is ensured to be basically unchanged; (4) when the outlet pressure is higherP ₃ When the pressure in the pressure chamber P3 is reducedP ₃ The diaphragm is transmitted into the diaphragm cavity of the bottom cover through the feedback hole, the diaphragm drives the double valve plugs of the valve rod to move downwards, the opening amount of the double valve holes is reduced, the double valve holes are throttled simultaneously, and pressure is enabled to be appliedP ₂ And also correspondingly reduced, the pressure is maintainedP ₂ –P ₃ The flow is basically unchanged, and the flow is ensured to be basically unchanged.

The invention has reasonable structural design, the valve shaft is matched with the threads of the upper valve plug in a mounting way, the upper valve plug is limited by the guide rod, the rotary motion of the valve shaft is converted into the up-and-down linear motion of the upper valve plug, the upper valve plug realizes the gradual closing of the conical through hole III until the conical through hole is completely sealed and closed, and the oblique cone type design is adopted, so that the tightness can be ensured during closing, the clamping phenomenon cannot occur, and the invention has good practical application and popularization values.

Drawings

Fig. 1 shows a schematic view of the structure of the control valve according to the present invention.

Fig. 2 shows a schematic cross-sectional view a-a of fig. 1.

In the figure: 1-valve body, 2-valve cover, 3-bottom cover, 4- (elastic) membrane, 5-spring, 6-valve rod, 7-valve shaft, 8 a-spacer, 8 b-still, 9-upper valve plug, 10-valve rod plug I, 11-valve rod plug II, 12-guide rod, 13-port I, 14-port II, 15-conical port III, 16-port IV, 17-feedback hole, 18-temperature measuring plug, 19-rotary groove and 20-locking cover.

Detailed Description

The following detailed description of specific embodiments of the invention refers to the accompanying drawings.

The utility model provides a cone seals formula flow control valve of relying on oneself, as shown in fig. 1, 2, including valve body 1, the import department of valve body 1 is equipped with pressure chamber P1 (the mouth of pressure chamber P1 is as the rivers import of valve body, and have and connect the internal thread), the exit of valve body 1 is equipped with pressure chamber P3 (the mouth of pressure chamber P3 is as the rivers export, and have and connect the external thread), the middle part of valve body 1 has pressure chamber P2, as shown in fig. 1, pressure chamber P2 is horizontal U type cavity, pressure chamber P2 is through two ports I13 and the port II 14 that get into rivers and communicate with pressure chamber P1, port I13 and port II 14 are located the same axis.

As shown in fig. 1, bolt installation bottom 3 is passed through to valve body 1 bottom, installation diaphragm 4 on the bottom 3, diaphragm 4 is as the lower bottom of pressure chamber P2, be equipped with spring mounting boss and diaphragm 4 lower surface on the bottom 3 bottom surface between be equipped with spring 5, 4 central preformed holes of diaphragm assemble valve rod 6 (the valve rod 6 bottom stretches into in the spring 5), valve rod 6 passes through in proper order and is equipped with valve rod stopper I10 in I13 department of opening behind I13 and the II 14 of opening, be equipped with valve rod stopper II 11 in II 14 departments of opening, valve rod stopper I10 is located pressure chamber P1, valve rod stopper II 11 is located pressure chamber P2.

As shown in fig. 1, a stationary blade 8b is assembled at a middle step in a valve body 1, the stationary blade 8b serves as the upper bottom of a pressure cavity P2, a conical through hole iii 15 through which water flows out is formed in the stationary blade 8b, a spacer 8a is assembled on the stationary blade 8b, a step hole for assembling a valve shaft 7 is formed in the upper surface of the spacer 8a, the step hole is coaxial with the conical through hole iii 15, a shaft shoulder of the valve shaft 7 is just positioned in the step hole of the spacer 8a, a valve cover 2 is installed at the top step of the valve body 1 through a bolt, the upper end of the valve shaft 7 penetrates out of the valve cover 2, a rotary groove 19 is formed in the end of the valve shaft 7, the lower end of the valve shaft 7 is positioned in the spacer 8a, the valve cover 2 tightly presses and assembles the spacer 8a and the stationary blade 8b on the middle step of.

As shown in fig. 1, the lower 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 hole of the conical through hole iii 15, so that tight closing is ensured. As shown in fig. 2, two guide rods 12 are symmetrically installed on the side surface of the upper valve plug 9, and the end portions of the guide rods 12 are located in guide grooves on the side surface of the spacer 8a (i.e., two guide grooves are symmetrically and vertically formed on the side surface of the spacer 8 a); a port IV 16 is formed in the side surface of the spacer 8a and communicated with the pressure cavity P3. The valve body 1 is provided with a feedback hole 17 for communicating the pressure chamber P3 with the inside of 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 temperature of water flow at the outlet of the control valve.

Through the number of turns of rotatory valve shaft, form fixed sectional area and rivers relation between the toper mouth III on realizing going up the valve plug and the still, set for the flow that needs 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 shaft upper end is equipped with the response pointer of instructing flow, can the flow of visual representation control valve.

As shown in fig. 1, the valve cap 2 is externally provided with a locking cover 20 which can be opened only by a special key to prevent an irrelevant person from adjusting freely.