Axial-flow type basic valve

Abstract

The utility model relates to an axial-flow type basic valve which comprises a valve body, a rubber container, a punching net cover, a tail supporting seat, a valve seat, a reset spring, a flow guide cover, a first valve, a matched pipe and a second valve. The valve body is a straight-through type inner cavity, the flow guide cover is fixed to an inlet in the valve body, the tail supporting seat is fixed to an outlet in the valve body, the valve seat is fixed to the flow guide cover and the tail supporting seat and located between the flow guide cover and the tail supporting seat, the punching mesh cover is fixed to the tail supporting seat, and a control cavity is formed among the inner wall of the valve body, the flow guide cover, the valve seat and the tail supporting seat. The rubber container is located in the control cavity, covers the surface of one side of the control cavity and is supported by the punched mesh enclosure. The reset spring is sleeved in the middle of the rubber liner; one end of the first valve is communicated with the inlet end of the valve body; one end of the second valve is communicated with the outlet end of the valve body; compared with the prior art, the utility model has the advantages that a large number of parts are reduced, the design cost is reduced, the performance is improved, and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of hydraulic control valve, especially to an axial flow type basic valve. BACKGROUND

[0002] At present, the diaphragm type hydraulic control valve with various functions on the market is composed of a valve body (similar to a stop valve), a valve cover, a valve shaft, a valve clapper assembly, a spring, a diaphragm, a diaphragm pressing plate, a valve seat and fasteners, and its working principle is mainly based on the pressure difference △P between the upstream and downstream as power, controlled by a pilot valve, so that the diaphragm hydraulic differential operation is realized, thereby completely automatically adjusting the opening, closing or regulating state of the main valve disc by water power.

[0003] It has the following defects:

[0004] 1. Many parts, high cost;

[0005] 2. Its flow channel is an "S" type channel, low inlet and high outlet, the flow state is poor, the turbulent disturbance is large, the opening degree linear characteristic is poor, and unstable factors such as vibration cavitation and pressure fluctuation are easy to occur. INVENTION CONTENTS

[0006] The utility model discloses a kind of axial flow type basic valves to overcome the defects of the prior art, such as "S" type of existing basic valve, turbulent disturbance is large, cavitation tendency is large, opening degree linear characteristic is poor, small opening degree state flow control is not accurate, and pressure fluctuation is big.

[0007] The purpose of the utility model can be realized by the following technical solutions:

[0008] An axial flow type basic valve, comprising a valve body, a rubber bladder, a punched mesh cover, a tail support seat, a valve seat, a reset spring, a flow guide cover, a first valve, a pipe and a second valve.

[0009] The valve body is a straight-through type inner cavity, the flow guide cover is fixed at the inlet in the valve body, the tail support seat is fixed at the outlet in the valve body, the valve seat is fixed on the flow guide cover and the tail support seat and located between the flow guide cover and the tail support seat, the punched mesh cover is fixed on the tail support seat, and the control cavity is formed between the inner wall of the valve body and the flow guide cover, the valve seat and the tail support seat; the rubber bladder is located in the control cavity, covers one side surface of the control cavity, and is supported by the punched mesh cover; the reset spring is sleeved on the middle position of the rubber bladder.

[0010] One end of the first valve is communicated with the inlet end of the valve body, and the other end is communicated with the control cavity through the pipe; one end of the second valve is communicated with the outlet end of the valve body, and the other end is communicated with the control cavity through the pipe.

[0011] Further, the rubber bladder is a molded elastic rubber sleeve, which shrinks when the water pressure in the control chamber rises and expands when the water pressure in the control chamber drops, and covers the flow guide cover, the valve seat and the tail support seat.

[0012] Further, the rubber bladder is a cylindrical structure with an inward recess, a middle part of the rubber bladder is provided with a fixing groove matched with the reset spring, and an end part of the rubber bladder is provided with a fixing protrusion for connecting the end part of the valve body.

[0013] Further, the punched mesh cover is a stainless steel equal-thickness conical pipe.

[0014] Further, the connection part of the valve seat and the flow guide cover and the connection part of the valve seat and the tail support seat are both provided with rubber rings.

[0015] Further, the first valve is a needle valve.

[0016] Further, the second valve is a ball valve.

[0017] Further, the axial basic valve further comprises a pilot valve located in the connecting pipeline between the second valve and the outlet end of the valve body.

[0018] Further, the inlet end and the outlet end of the valve body are both provided with standard flanges, and each standard flange is provided with a step for fixing the flow guide cover and the tail support seat.

[0019] Further, when the first valve is opened and the second valve is closed, the water pressure at the inlet end of the axial basic valve enters the valve body and the control chamber respectively, the rubber bladder covers the surfaces of the flow guide cover, the valve seat and the tail support seat, and the axial basic valve is in a fully closed state.

[0020] When the first valve is opened and the second valve is opened with an opening degree not less than 0, the water flow passing through the first valve and the ball valve reaches balance, the rubber bladder floats in the control chamber, and the axial basic valve is in a floating state.

[0021] When the first valve is closed and the second valve is opened, the water pressure in the control chamber is released through the second valve, the rubber bladder covers the inside of the valve body, and the axial basic valve is in a fully open state.

[0022] Compared with the prior art, the axial basic valve has the following advantages:

[0023] (1) The axial flow basic valve provided by this utility model forms a control cavity with the inner wall of the valve body by setting a flow guide shroud, valve seat and tail support seat in the valve body. On the one hand, the water pressure of the control cavity is controlled by connecting the needle valve pipeline at the inlet end of the valve body and the ball valve pipeline at the outlet end of the valve body. On the other hand, a rubber bladder is set in the control cavity and covers one side surface of the control cavity. When the water pressure on both sides of the control cavity is different, the rubber bladder covers the flow guide shroud and tail support seat, so that the valve is closed; or it covers the inner wall of the valve body, so that the flow guide shroud and tail support seat are connected and the valve is opened.

[0024] This results in an axial flow hydraulic control valve structure that is convenient and reliable in its control process.

[0025] (2) This utility model adopts a brand-new basic valve design concept and selects an axial flow fully symmetrical main valve flow channel, which greatly reduces the shortcomings of the existing basic valve such as “S” type, large flow channel turbulence disturbance, large cavitation tendency, poor opening linearity, inaccurate flow control at small opening, and large pressure fluctuation.

[0026] The basic valve of this utility model adopts an extremely simple and reasonable design structure, greatly reducing the number of parts. The main valve part does not even use a single screw, which greatly reduces the design cost and greatly improves the performance advantages. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the axial side profile of an axial flow basic valve provided in an embodiment of this utility model;

[0028] Figure 2 This is a schematic diagram of the main structure of an axial flow basic valve provided in an embodiment of this utility model;

[0029] Figure 3 This is a schematic diagram of the cross-sectional structure of an axial flow basic valve provided in an embodiment of this utility model;

[0030] Figure 4 This is a schematic diagram of the rubber liner of an axial flow basic valve provided in an embodiment of this utility model;

[0031] Figure 5 This is a schematic diagram illustrating the fully closed principle of an axial flow basic valve provided in an embodiment of this utility model;

[0032] Figure 6 This is a schematic diagram of the intermediate floating principle of an axial flow basic valve provided in an embodiment of this utility model;

[0033] Figure 7 This is a schematic diagram of the fully open principle of an axial flow basic valve provided in an embodiment of this utility model;

[0034] In the figure, 1, valve body, 2, rubber bladder, 3, punched mesh cover, 4, tail support seat, 5, rubber ring, 6, valve seat, 7, reset spring, 8, flow guide cover, 9, needle valve, 10, pipe, 11, ball valve, 12, pilot valve, 13, control cavity. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part 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 herein can be arranged and designed in various different configurations.

[0036] 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0037] 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.

[0038] 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.

[0039] It should be noted that the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "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.

[0040] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0041] Example 1

[0042] like Figures 1-3 As shown, this embodiment provides an axial flow basic valve, including a valve body 1, a rubber liner 2, a perforated mesh cover 3, a tail support 4, a valve seat 6, a return spring 7, a flow guide 8, a first valve, a piping 10, and a second valve.

[0043] The valve body 1 has a straight-through inner cavity. The flow guide shroud 8 is fixed at the inlet inside the valve body 1, the tail support 4 is fixed at the outlet inside the valve body 1, the valve seat 6 is fixed on the flow guide shroud 8 and the tail support 4, and is located between the flow guide shroud 8 and the tail support 4. The perforated mesh cover 3 is fixed on the tail support 4. The inner wall of the valve body 1 and the flow guide shroud 8, the valve seat 6 and the tail support 4 form a control cavity 13. The rubber bladder 2 is located inside the control cavity 13, covers one side surface of the control cavity 13 and is supported by the perforated mesh cover 3. The return spring 7 is sleeved in the middle position of the rubber bladder 2.

[0044] One end of the first valve is connected to the inlet end of the valve body 1, and the other end is connected to the control chamber 13 through the piping 10; one end of the second valve is connected to the outlet end of the valve body 1, and the other end is connected to the control chamber 13 through the piping 10.

[0045] Preferably, the valve body 1 has a straight-through inner cavity with a simple shape and structure. Both the inlet and outlet ends of the valve body 1 are provided with standard flanges, and each standard flange is provided with a step for fixing the flow guide shroud 8 and the tail support seat 4.

[0046] Optionally, the rubber bladder 2 is a molded elastic rubber sleeve, typically 4-8mm thick, such as... Figure 4 The figure shows the natural state of the molded structure. It contracts when the water pressure in the control chamber 13 increases and expands when the water pressure in the control chamber 13 decreases, covering the guide shroud 8, valve seat 6, and tail support seat 4.

[0047] like Figure 4 As shown, preferably, the rubber bladder 2 is a cylindrical structure that is recessed inward. The middle part of the rubber bladder 2 is provided with a fixing groove that cooperates with the return spring 7, and the end of the rubber bladder 2 is provided with a fixing protrusion for connecting the end of the valve body 1.

[0048] Preferably, the perforated mesh cover 3 is a stainless steel conical tube of uniform thickness, generally 2-4mm thick, which is spot-welded and fixed to the tail support 4 to support the contraction of the right half of the rubber bladder.

[0049] Tail support seat 4 is fixed at the outlet of valve body, and used to support and fix the right end of stainless steel punched mesh cover 3 and rubber bladder 2

[0050] Preferably, rubber ring 5 is arranged at the connection between valve seat 6 and guide cover 8, and the connection between valve seat 6 and tail support seat 4, and two rubber rings 5 are arranged at the two positions respectively in the embodiment to maintain the sealing state of the corresponding areas.

[0051] Valve seat 6 is fixed on guide cover 8 and tail support seat 4, and the water pressure in control cavity 13 increases when the valve is closed, and valve seat 6 cooperates with rubber bladder 2 to seal, so as to cut off the water flow pressure of the inlet and outlet.

[0052] Reset spring 7 is sleeved on the middle position of rubber bladder 2, and mainly used for easy resetting of rubber bladder 2 under the action of spring when the pressure in control cavity 13 is lost.

[0053] Guide cover 8 is fixed at the inlet of valve body 1, and has half of the supporting force and fixing effect on rubber bladder 2 and valve seat 6.

[0054] The first valve is preferably needle valve 9, which is fixed at the inlet side of basic valve, and the inlet of needle valve 9 is communicated with the inlet side of basic valve, and the outlet is communicated with control cavity 13.

[0055] Pipe 10 mainly refers to various long and short pipes connecting the inlet cavity and the outlet cavity, and needle valve 9, ball valve 11 and pilot valve 12 are arranged in the pipe, which is used for adjusting the pressure and action of control cavity 13.

[0056] The second valve is preferably ball valve 11, which is fixed between needle valve 9 and pilot valve 12, and is biased to the outlet side, and is used for opening and closing the conduction of pipe 10.

[0057] Preferably, the axial basic valve further comprises pilot valve 12, which is arranged in the connecting pipeline between the second valve and the outlet end of valve body 1, and is mainly used for adjusting the pressure change of control cavity 13.

[0058] Working principle:

[0059] As shown in Figure 5 When needle valve 9 is opened and ball valve 11 is closed, the water pressure at the inlet end of axial basic valve enters valve body 1 and control cavity 13 respectively, and rubber bladder 2 covers the surface of guide cover 8, valve seat 6 and tail support seat 4, so that the axial basic valve is in a fully closed state;

[0060] As shown in Figure 6 When needle valve 9 is opened and ball valve 11 is opened with an opening degree not less than 0, the water flow passing through needle valve 9 and ball valve 11 reaches balance, and rubber bladder 2 floats in control cavity 13, so that the axial basic valve is in a floating state;

[0061] As shown in Figure 7As shown, when the needle valve 9 is closed and the ball valve 11 is opened, the water pressure in the control cavity 13 is released through the ball valve 11, the rubber bladder 2 covers the inside of the valve body 1, and at this time the axial basic valve is in a fully open state.

[0062] The following provides a specific example of the above axial basic valve:

[0063] An axial basic valve, as shown in detail Figure 2 : The basic valve mainly consists of a valve body 1, a rubber bladder 2, a punched mesh cover 3, a tail support seat 4, a rubber ring 5, a valve seat 6, a reset spring 7, a flow guide cover 8, a needle valve 9, a pipe 10, a ball valve 11, a pilot valve 12, etc. The valve body 1 is a straight-through type inner cavity, with simple shape and structure, the valve body inlet and outlet are standard flanges, and the flanges are provided with steps for fixing the tail support seat 4 and the flow guide cover 8. The rubber bladder 2 is a molded elastic rubber sleeve, with a thickness of generally 4-8 mm, as shown in the figure, the rubber bladder starts to shrink when the water pressure in the control cavity 13 rises, and starts to expand when the water pressure drops. Figure 4 The punched mesh cover 3 is made of stainless steel into an equal-thickness conical tube, with a thickness of generally 2-4 mm, spot-welded and fixed on the tail support seat 4, for supporting the contraction of the rubber bladder 2. The tail support seat 4 is fixed at the outlet of the valve body, and is used to support and fix the right end part of the stainless steel punched mesh cover 3 and the rubber bladder 2. The rubber ring 5 has two, fixed between the valve seat 6 and the flow guide cover 8, the tail support seat 4, and maintaining the sealing state between them. The valve seat 6 is fixed on the flow guide cover 8 and the tail support seat 4, and when the valve is closed, the water pressure in the control cavity 13 will increase, and the valve seat 6 cooperates with the rubber bladder 2 to seal, so as to cut off the water pressure of the inlet and outlet. The reset spring 7 is sleeved on the middle position of the rubber bladder 2, mainly for easy resetting of the rubber bladder 2 under the action of the spring when the control cavity 13 loses pressure. The flow guide cover 8 is fixed at the inlet of the valve body, and has half of the supporting force and fixing effect on the rubber bladder 2 and the valve seat 6. The needle valve 9 is fixed at the inlet side of the basic valve, the needle valve 9 pipe inlet is communicated with the inlet side of the basic valve, and the outlet is communicated with the control cavity 13. The pipe 10 mainly refers to various long and short pipelines connecting the inlet cavity and the outlet cavity, and the pipelines are arranged with the needle valve 9, the ball valve 11 and the pilot valve 12, for adjusting the pressure and action of the control cavity 13. The ball valve 11 is fixed between the needle valve 9 and the pilot valve 12, and is biased to the outlet side, for opening and closing the pipeline conduction. The pilot valve 12 is fixed at the outlet end of the basic valve, mainly for adjusting the pressure change of the control cavity 13.

[0064] The above describes the preferred embodiment of the present application in detail. It should be understood that those skilled in the art can make many modifications and changes without creative labor according to the concept of the present application. Therefore, any technical solution obtained by logical analysis, reasoning or limited experiment on the basis of the existing technology according to the concept of the present application shall be within the protection scope defined by the claims.

Claims

1. An axial flow base valve characterized by, The valve body (1), rubber bladder (2), punched mesh cover (3), tail support seat (4), valve seat (6), reset spring (7), flow guide cover (8), first valve, pipe (10) and second valve are included. The valve body (1) is a straight-through type inner cavity, the flow guide cover (8) is fixed at the inlet of the valve body (1), the tail support seat (4) is fixed at the outlet of the valve body (1), the valve seat (6) is fixed on the flow guide cover (8) and the tail support seat (4) and is located between the flow guide cover (8) and the tail support seat (4), the punched mesh cover (3) is fixed on the tail support seat (4), and the control cavity (13) is formed between the inner wall of the valve body (1) and the flow guide cover (8), the valve seat (6) and the tail support seat (4); the rubber bladder (2) is located in the control cavity (13) and covers one side surface of the control cavity (13) and is supported by the punched mesh cover (3); the reset spring (7) is sleeved on the middle position of the rubber bladder (2). One end of the first valve is communicated with the inlet end of the valve body (1), and the other end is communicated with the control cavity (13) through the pipe (10); one end of the second valve is communicated with the outlet end of the valve body (1), and the other end is communicated with the control cavity (13) through the pipe (10).

2. An axial flow base valve according to claim 1, wherein The rubber bladder (2) is an elastic rubber sleeve formed by molding, shrinks when the water pressure in the control cavity (13) rises, expands when the water pressure in the control cavity (13) drops, and covers the flow guide cover (8), the valve seat (6) and the tail support seat (4).

3. A axial flow base valve according to claim 1, wherein, The rubber bladder (2) is a cylindrical structure recessed inward, the middle part of the rubber bladder (2) is provided with a fixing groove matched with the reset spring (7), and the end part of the rubber bladder (2) is provided with a fixing protrusion used for connecting the end part of the valve body (1).

4. A axial flow base valve according to claim 1, wherein, The punched mesh cover (3) is a stainless steel equal-thickness conical pipe.

5. A axial flow primary valve according to claim 1, wherein, Rubber rings (5) are arranged at the connection between the valve seat (6) and the flow guide cover (8) and the connection between the valve seat (6) and the tail support seat (4).

6. A axial flow primary valve according to claim 1, wherein, The first valve is a needle valve (9).

7. A axial flow base valve according to claim 1, wherein, The second valve is a ball valve (11).

8. A axial flow base valve according to claim 1, wherein, The axial flow type basic valve further comprises a pilot valve (12) located in the connecting pipeline between the second valve and the outlet end of the valve body (1).

9. A axial flow primary valve according to claim 1, wherein, The inlet end and the outlet end of the valve body (1) are provided with standard flanges, and each standard flange is provided with a step for fixing the flow guide cover (8) and the tail support seat (4).

10. A axial flow primary valve according to claim 1, wherein, When the first valve is opened and the second valve is closed, the water pressure at the inlet end of the axial flow type basic valve enters the valve body (1) and the control cavity (13) respectively, the rubber bladder (2) covers the surfaces of the flow guide cover (8), the valve seat (6) and the tail support seat (4), and the axial flow type basic valve is in a full-closed state; When the first valve is opened and the second valve is opened at an opening degree not less than 0, the water flow passing through the first valve and the ball valve (11) reaches balance, the rubber bladder (2) is floating in the control cavity (13), and the axial flow type basic valve is in a floating state; When the first valve is closed and the second valve is open, the water pressure in the control chamber (13) is released through the second valve, the rubber bladder (2) covers the inside of the valve body (1), and the axial flow basic valve is in the fully open state.

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