Axial-flow type diaphragm hydraulic control valve

Abstract

The utility model relates to an axial flow type diaphragm hydraulic control valve, which comprises a left valve body, a valve seat, a valve core component, a spring, a right valve body and a piping component, the valve seat is arranged at the inlet end of the left valve body, a hollow boss and a half of a control cavity are arranged in the left valve body, the control cavity in the left valve body is provided with a through hole, and the valve core component is arranged in the through hole. The other half of the control cavity is arranged in the right valve body, and the left valve body is connected with the right valve body. The valve element assembly comprises a valve disc, a valve shaft, a forming diaphragm and a diaphragm pressing plate. The piping assembly comprises a pipe fitting, a first valve and a second valve. Compared with the prior art, the utility model has the advantages of simple structure, flexible switch, stable flow state, cavitation resistance, small vibration, scale prevention, turbulent flow elimination and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of hydraulic control valve especially relates to a axial -flow type diaphragm hydraulic control valve. BACKGROUND

[0002] Hydraulic control valve is a kind of valve using water pressure, kinetic energy and potential energy to control, the hydraulic control valve on the market currently generally has two kinds:

[0003] The first kind is traditional "S" type hydraulic control valve, adopts lower inlet upper outlet, flow state is extremely unstable;

[0004] The second kind is crooked neck hydraulic control valve, adopts 45 ° water inlet 45 ° water outlet, and flow state is also unstable;

[0005] The defects of traditional "S" type hydraulic control valve and crooked neck hydraulic control valve:

[0006] 1. Complex shape, processing procedure is numerous, and processing precision also requires higher;

[0007] 2. Fluid medium, generates turbulence, and flow resistance is higher;

[0008] 3. When overflows, noise vibration is larger;

[0009] 4. Easy to cavitation, easy to scale. INVENTION CONTENTS

[0010] The utility model discloses a kind of axial -flow type diaphragm hydraulic control valves to overcome the defects of the prior art, with simple structure, stable flow state, flexible switch.

[0011] The purpose of the utility model can be realized through the following technical solutions:

[0012] A kind of axial -flow type diaphragm hydraulic control valve, including left valve body, valve seat, valve core subassembly, spring, right valve body and pipe assembly, the valve seat is installed at the import end of left valve body, the hollow boss and the half of control cavity are equipped in the inside of left valve body, the control cavity in the left valve body is equipped with through hole, the other half of control cavity is equipped in the inside of right valve body, left valve body and right valve body are connected with each other;

[0013] The valve core subassembly includes valve disc, valve shaft, shaped diaphragm and diaphragm pressing plate, one end of the valve shaft is connected valve disc, the other end is connected shaped diaphragm and diaphragm pressing plate, the valve disc is matched with the shape of import end of left valve body, shaped diaphragm and diaphragm pressing plate are fixed with each other, shaped diaphragm is also connected the inside of control cavity, the diaphragm pressing plate is matched with the shape of the through hole of control cavity;Spring is located outside valve shaft, and one end is connected valve disc, the other end is supported by boss, the valve shaft is inserted into the control cavity after passing through boss;

[0014] The pipe assembly comprises a pipe, a first valve and a second valve, one end of the first valve is communicated with the inlet end of the left valve body through the pipe, the other end is communicated with the control cavity through the pipe; one end of the second valve is communicated with the control cavity through the pipe, the other end is communicated with the outlet end of the right valve body.

[0015] Further, the left valve body is a streamline body horn structure, one end is a water inlet standard flange, the other end is a middle flange, the middle flange is provided with an O-shaped sealing groove in the connecting surface of the right valve body, and the O-shaped sealing groove is provided with a first O-shaped ring.

[0016] Further, the valve seat is a ring body structure of stainless steel, and a plurality of water filtering holes are distributed in the circumferential direction of the valve seat.

[0017] Further, the valve core assembly further comprises a nut and a second O-shaped ring, the valve disc is fixed at one end of the valve shaft through the nut, and the second O-shaped ring is arranged on the connecting surface of the valve disc and the valve shaft.

[0018] The formed diaphragm and the diaphragm pressing plate are fixed to each other and connected to one end of the valve shaft.

[0019] Further, the valve disc is covered with rubber around.

[0020] Further, the formed diaphragm is a reverse bowl structure, the outer edge is connected to the inner side of the control cavity, and the bottom is fixed to one end of the valve shaft by the diaphragm pressing plate.

[0021] Further, the ratio of the stress area of the diaphragm pressing plate to the stress area of the valve disc is 1.3:1.

[0022] Further, the axial flow type diaphragm hydraulic control valve further comprises a copper sleeve, the outer circle of the copper sleeve is fixed in the boss in the middle of the left valve body, and the inner hole of the copper sleeve is a guide hole of the valve core assembly.

[0023] Further, the pipe assembly further comprises a pilot valve, the pilot valve is located on the pipeline between the second valve and the outlet end of the right valve body, one end of the pilot valve is communicated with the second valve through the pipe, and the other end is communicated with the outlet end of the right valve body through the pipe.

[0024] The first valve is a needle valve, and the second valve is a ball valve.

[0025] Further, when the first valve is opened and the second valve is closed, the axial flow type diaphragm hydraulic control valve is in a full closed state.

[0026] When the first valve is closed and the second valve is opened, the axial flow type diaphragm hydraulic control valve is in a full open state.

[0027] When the first valve and the second valve are both opened, the axial flow type diaphragm hydraulic control valve is in a floating state.

[0028] Compared with the prior art, the utility model has the following advantages:

[0029] (1) the axial flow type diaphragm hydraulic control valve provided by the utility model is provided with control cavities and valve core assemblies in the left valve body and the right valve body, one end of the valve shaft in the valve core assembly is sealed with the inlet end of the left valve body through the valve disc, and the other end realizes the sealing of the control cavities through the formed diaphragm and the diaphragm pressing plate;Through the movement of the formed diaphragm, the positioning guide of the copper sleeve and the spring are driven to move the valve shaft and the valve disc, so that the opening and closing functions of the hydraulic control valve are realized.

[0030] The pipe fittings are arranged outside the valve body, which are connected with the inlet end of the left valve body and the control cavities and controlled by the needle valve on the one hand, and connected with the outlet end of the right valve body and the control cavities and controlled by the ball valve on the other hand;The opening and closing of the ball valve and the needle valve can control the water pressure in the control cavities, so that the opening and closing of the control valve can be realized.

[0031] Overall, the utility model has the advantages of simple structure, flexible opening and closing, stable flow state, anti-cavitation, small vibration, water scale prevention, elimination of turbulence and the like.

[0032] (2) the axial flow type diaphragm hydraulic control valve of the utility model can be connected according to different functional requirements, and can be configured as a pressure reducing valve, a pressure relief valve, a floating ball water level valve and the like. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 It is a structure schematic view of the axial flow type diaphragm hydraulic control valve provided in the utility model embodiment;

[0034] Figure 2 It is a full-closed state structure schematic view of the axial flow type diaphragm hydraulic control valve provided in the utility model embodiment;

[0035] Figure 3 It is a floating state structure schematic view of the axial flow type diaphragm hydraulic control valve provided in the utility model embodiment;

[0036] Figure 4 It is a full-open state structure schematic view of the axial flow type diaphragm hydraulic control valve provided in the utility model embodiment;

[0037] In the figure, 1, left valve body, 2, valve seat, 3, valve core assembly, 4, spring, 5, copper sleeve, 6, first O-ring, 7, right valve body, 8, pipe assembly, 9, control cavity, 3-1, nut, 3-2, second O-ring, 3-3, valve disc, 3-4, valve shaft, 3-5, shaped diaphragm, 3-6 diaphragm pressing plate, 8-1, pilot valve, 8-2, ball valve, 8-3, pipe fitting, 8-4, needle valve. DETAILED DESCRIPTION

[0038] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the following will be a clear and complete description of the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0040] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0041] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the product of the present application is used, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0042] It should be noted that the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0043] Embodiment 1

[0044] As Figure 1 The embodiment provides an axial flow type diaphragm hydraulic control valve which comprises a left valve body 1, a valve seat 2, a valve core assembly 3, a spring 4, a right valve body 7 and a pipe assembly 8, the valve seat 2 is installed at the inlet end of the left valve body 1, the left valve body 1 is internally provided with a hollow boss and one half of a control cavity 9, the control cavity 9 in the left valve body 1 is provided with a through hole, the right valve body 7 is internally provided with the other half of the control cavity 9, and the left valve body 1 and the right valve body 7 are connected with each other.

[0045] The valve core assembly 3 comprises a valve disc 3-3, a valve shaft 3-4, a shaped diaphragm 3-5 and a diaphragm pressing plate 3-6, one end of the valve shaft 3-4 is connected with the valve disc 3-3, the other end is connected with the shaped diaphragm 3-5 and the diaphragm pressing plate 3-6, the valve disc 3-3 is matched with the shape of the inlet end of the left valve body 1, the shaped diaphragm 3-5 and the diaphragm pressing plate 3-6 are fixed with each other, the shaped diaphragm 3-5 is also connected with the inside of the control cavity 9, and the diaphragm pressing plate 3-6 is matched with the shape of the through hole of the control cavity 9; the spring 4 is located outside the valve shaft 3-4, one end of the spring 4 is connected with the valve disc 3-3, and the other end of the spring 4 is supported by the boss, the valve shaft 3-4 extends into the control cavity 9 through the boss.

[0046] The pipe assembly 8 comprises a pipe fitting 8-3, a first valve and a second valve, one end of the first valve is communicated with the inlet end of the left valve body 1 through the pipe fitting 8-3, the other end of the first valve is communicated with the control cavity 9 through the pipe fitting 8-3, one end of the second valve is communicated with the control cavity 9 through the pipe fitting 8-3, and the other end of the second valve is communicated with the outlet end of the right valve body 7.

[0047] Specifically, in the embodiment, the first valve is a needle valve 8-4, and the second valve is a ball valve 8-2.

[0048] The left valve body 1 is a streamline body horn structure, one end of the left valve body 1 is a water inlet standard flange, the other end of the left valve body 1 is a middle flange, an O-shaped sealing groove is arranged in the connecting surface of the middle flange and the right valve body 7, and a first O-shaped ring 6 is arranged in the O-shaped sealing groove.

[0049] The first O-shaped ring 6 is arranged as a face static seal between the middle flanges of the left valve body 1 and the right valve body 7.

[0050] The boss and the rib plate arranged in the left valve body 1 are used for arranging the valve core assembly 3 and the half of the control cavity 9.

[0051] The valve seat 2 is a ring body structure made of stainless steel, is fixed to the inlet end of the left valve body 1 and is used as a sealing surface of a main sealing pair, a plurality of 2mm small holes are drilled in the circumferential direction of the valve seat 2, and the plurality of 2mm small holes play a role of filtering water quality.

[0052] The valve core assembly 3 further comprises a nut 3-1 and a second O-shaped ring 3-2, the valve disc 3-3 is fixed to one end of the valve shaft 3-4 through the nut 3-1, and the second O-shaped ring 3-2 is arranged on the connecting surface of the valve disc 3-3 and the valve shaft 3-4.

[0053] The shaped diaphragm 3-5 and the diaphragm pressing plate 3-6 are fixed to each other and connected to one end of the valve shaft 3-4.

[0054] Overall, one end of the valve core assembly 3 is the main valve core, and the other end is the control chamber 9 piston, wherein the outer surface of the valve disc 3-3 is vulcanized with rubber to form an integral body, a second O-ring 3-2 is arranged in the middle, and the valve disc 3-3 is fixed to one end of the valve shaft 3-4 by a nut 3-1. The shaped diaphragm 3-5 and the diaphragm pressing plate 3-6 at the other end of the valve shaft 3-4 are fixed together by a nut, and are used as the piston for operating the control chamber 9.

[0055] The valve disc 3-3 is coated with rubber around the periphery to prevent water scale from being deposited on the valve disc and to play a soft sealing role

[0056] The shaped diaphragm 3-5 has an inverted bowl structure, the outer edge is connected to the inner side of the control chamber 9, and the bottom is fixed to one end of the valve shaft 3-4 by the diaphragm pressing plate 3-6, so that the shaped diaphragm 3-5 is easy to stretch and plays a wear-resistant role, and can be better used to control the fluid tension and fluid floating.

[0057] The ratio of the stress area of the diaphragm pressing plate 3-6 to the stress area of the valve disc 3-3 is 1.3:1.

[0058] The spring 4 is arranged on the valve shaft, one end of the spring 4 is in contact with the valve disc 3-3 of the valve core assembly, and the other end of the spring 4 is positioned on the boss in the middle of the left valve body 1. The spring 4 is preferably made of stainless steel, mainly plays a reset role of the valve disc 3-3.

[0059] Preferably, the axial flow type diaphragm hydraulic control valve further comprises a copper sleeve 5, the outer circle of the copper sleeve 5 is fixed in the boss in the middle of the left valve body 1, the inner hole of the copper sleeve 5 is the guide hole of the valve core assembly 3, and the boss in the middle of the left valve body 1 serves as the limit of the piston area of the control chamber 9 and the full closing of the valve core assembly.

[0060] The right valve body 7 serves as the outlet end valve body, mainly containing the other half structure of the control chamber 9, and serving as the limit of the full opening of the valve core assembly.

[0061] The pipe assembly 8 further comprises a pilot valve 8-1, one end of the pilot valve 8-1 is communicated with the second valve through a pipe fitting 8-3, and the other end of the pilot valve 8-1 is communicated with the outlet end of the right valve body 7 through a pipe fitting 8-3.

[0062] The first valve is a needle valve 8-4, and the second valve is a ball valve 8-2.

[0063] One end of the needle valve 8-4 is communicated with the valve seat of the left valve body 1 and the inlet end, and the other end of the needle valve 8-4 is communicated with the control chamber 9 at the connection between the left valve body 1 and the right valve body 7.

[0064] One end of the ball valve 8-2 is communicated with the valve seat of the right valve body 7 and the inlet end, and the other end of the ball valve 8-2 is communicated with the control chamber 9 at the connection between the left valve body 1 and the right valve body 7.

[0065] The control cavity 9 is communicated with the left valve body 1, the pilot valve 8-1, the ball valve 8-2, the pipe 8-3, the needle valve 8-4, the right valve body 7 and the outlet end in sequence, and is used for controlling the required pressure and flow after the valve.

[0066] The working state of the axial flow diaphragm hydraulic control valve is described by taking the following scheme as an example.

[0067] The axial flow diaphragm hydraulic control valve is used as a basic valve, and is externally provided with a throttling needle valve, a pilot valve, a ball valve and a pipe; the force receiving area of the diaphragm plate of the control cavity 9 and the force receiving area of the valve disc are 1.3:1; one end of the needle valve is communicated with the valve seat of the left valve body 1 and the inlet end; the other end of the needle valve is communicated with the control cavity 9 at the connection position of the left valve body 1 and the right valve body 7; the control cavity 9 is communicated with the left valve body, the ball valve, the pilot valve, the right valve body and the outlet end in sequence; a plurality of 2mm small holes are drilled in the circumferential direction of the stainless steel valve seat, and the small holes are used for filtering water quality; the valve disc is covered with rubber in the periphery, so that water scale is prevented from being deposited on the valve disc, and a soft seal is realized; the formed diaphragm of the rubber is designed in a corrugated type, so that the diaphragm is easy to stretch, and wear resistance is realized; and corresponding working states are as follows.

[0068] Full-closed state: as shown in the figure, when the water pressure of the control valve inlet end enters the valve body, the water pressure of the needle valve 8-4 enters the control cavity 9, and the external ball valve 8-2 is closed, the control valve is in a closed state. Figure 2

[0069] Full-open state: as shown in the figure, when the needle valve 8-4 of the control valve inlet end is closed, the ball valve 8-2 is opened, at this time, the water pressure in the control cavity 9 is completely released to the outlet end, and the control valve is in a full-open state. Figure 3

[0070] Floating state: as shown in the figure, when the ball valve 8-2 of the control valve outlet end is opened, the water flow passing through the needle valve 8-4 and the ball valve 8-2 is balanced, and the valve disc 3-3 is in a balanced state under the action of the spring and the water flow, that is, the water flow of the needle valve and the ball valve is balanced, and the water flow of the spring and the valve core is balanced, at this time, the control valve is in a floating state. Figure 4

[0071] The preferred embodiments of the utility model are described in detail above. It should be understood that those skilled in the art can make many modifications and changes according to the conception of the utility model without creative labor. Therefore, any technical scheme obtained by logical analysis, reasoning or limited experiment on the basis of the prior art according to the conception of the utility model should be within the protection scope determined by the claims.​​​

Claims

1. A diaphragm hydraulic control valve of axial flow type, characterized in that, It comprises left valve body (1), valve seat (2), valve core assembly (3), spring (4), right valve body (7) and pipe assembly (8), the valve seat (2) is installed in the inlet end of left valve body (1), the inside of left valve body (1) is equipped with hollow boss and half of control cavity (9), the control cavity (9) in left valve body (1) is equipped with through hole, the inside of right valve body (7) is equipped with the other half of control cavity (9), left valve body (1) and right valve body (7) are connected with each other; The valve core assembly (3) comprises valve disc (3-3), valve shaft (3-4), shaped diaphragm (3-5) and diaphragm pressing plate (3-6), one end of valve shaft (3-4) is connected with valve disc (3-3), the other end is connected with shaped diaphragm (3-5) and diaphragm pressing plate (3-6), valve disc (3-3) is matched with the shape of inlet end of left valve body (1), shaped diaphragm (3-5) and diaphragm pressing plate (3-6) are fixed with each other, shaped diaphragm (3-5) is also connected with the inside of control cavity (9), diaphragm pressing plate (3-6) is matched with the shape of through hole of control cavity (9), spring (4) is located outside valve shaft (3-4), one end is connected with valve disc (3-3), the other end is supported by boss, valve shaft (3-4) extends into control cavity (9) after penetrating through boss; The pipe assembly (8) comprises pipe fitting (8-3), first valve and second valve, one end of first valve is communicated with inlet end of left valve body (1) through pipe fitting (8-3), the other end is communicated with control cavity (9) through pipe fitting (8-3), one end of second valve is communicated with control cavity (9) through pipe fitting (8-3), the other end is communicated with outlet end of right valve body (7).

2. A axial flow diaphragm hydraulic control valve according to claim 1, characterized in that, The left valve body (1) is streamline body horn type structure, one end is water inlet standard flange, the other end is middle flange, the connecting surface of middle flange and right valve body (7) is equipped with O type sealing groove, the O type sealing groove is equipped with first O type ring (6).

3. A axial flow diaphragm hydraulic control valve according to claim 1, wherein, The valve seat (2) is annular body structure of stainless steel, a plurality of water filtering holes are distributed in the circumferential direction of valve seat (2).

4. A axial flow diaphragm hydraulic control valve according to claim 1, wherein, The valve core assembly (3) further comprises nut (3-1) and second O type ring (3-2), valve disc (3-3) is fixed on one end of valve shaft (3-4) through nut (3-1), second O type ring (3-2) is arranged on the connecting surface of valve disc (3-3) and valve shaft (3-4); The shaped diaphragm (3-5) and diaphragm pressing plate (3-6) are fixed with each other and connected on one end of valve shaft (3-4).

5. A axial flow diaphragm hydraulic control valve according to claim 1, wherein, The periphery of valve disc (3-3) is covered with rubber.

6. A axial-flow diaphragm hydraulic control valve according to claim 1, characterized in that, The shaped diaphragm (3-5) is inverted bowl type structure, the outer edge is connected with the inside of control cavity (9), the bottom is fixed on one end of valve shaft (3-4) by diaphragm pressing plate (3-6).

7. A axial-flow diaphragm hydraulic control valve according to claim 1, characterized in that, The ratio of the stress area of diaphragm pressing plate (3-6) to the stress area of valve disc (3-3) is 1.3:

1.

8. A axial-flow diaphragm hydraulic control valve according to claim 1, characterized in that, The axial flow type diaphragm hydraulic control valve further comprises copper sleeve (5), the outer circle of copper sleeve (5) is fixed in the boss in the middle of left valve body (1), the inner hole of copper sleeve (5) is guide hole of valve core assembly (3).

9. A axial-flow diaphragm hydraulic control valve according to claim 1, characterized in that, The pipe assembly (8) further comprises a pilot valve (8-1) located on the pipeline of the outlet end of the right valve body (7) and connected to the second valve at one end and to the outlet end of the right valve body (7) at the other end through a pipe fitting (8-3); The first valve is a needle valve (8-4) and the second valve is a ball valve (8-2).

10. A axial-flow diaphragm hydraulic control valve according to claim 1, characterized in that, When the first valve is opened and the second valve is closed, the axial flow diaphragm hydraulic control valve is in a fully closed state; When the first valve is closed and the second valve is opened, the axial flow diaphragm hydraulic control valve is in a fully open state; When the first valve and the second valve are both opened, the axial flow diaphragm hydraulic control valve is in a floating state.

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