Control valve

Abstract

The control valve comprises a valve body, a valve seat, a valve element component and a first connecting pipe, the valve body is in a cup shape, the valve seat is a three-way pipe fitting and located in an inner cavity of the valve body, the valve seat comprises a first port part, a second port part and a third port part, the first port part serves as a valve port part, the second port part serves as a valve port part, and the third port part serves as a valve port part. The valve element part can abut against the valve port part, the second port part is fixedly connected with the bottom of the valve body, and the third port part is located on the side of the valve seat and fixedly connected with the first connecting pipe. Compared with the prior art, the material cost of the electromagnetic valve is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of fluid control, and in particular to a control valve. Background Art

[0002] Solenoid valve products are widely used. Figure 1 The following is a schematic diagram of the structure of a solenoid valve in the background technology. Figure 1 As shown, the solenoid valve includes a valve body 01 and a valve core component 02. The valve body 01 includes a valve port 011, a fluid inlet 012 and a fluid outlet 013. The valve core component 02 can open or close the valve port 011. When the valve port 011 is opened, the fluid inlet 012 is connected to the fluid outlet 013; when the valve port 011 is closed, the fluid inlet 012 is not connected to the fluid outlet 013. In the solenoid valve of this structure, the valve body 01 is made of brass castings, and the material cost is high. The material cost of the solenoid valve has room for reduction. Summary of the invention

[0003] The control valve provided by the present invention includes a valve body, a valve seat, a valve core component and a first connecting pipe, the valve body is cup-shaped, the valve seat is a three-way pipe fitting, the valve seat is located in the inner cavity of the valve body, the valve seat includes a first port portion, a second port portion and a third port portion, the first port portion serves as a valve mouth portion, the valve core component can be abutted against the valve mouth portion, the second port portion is fixedly connected to the bottom of the valve body, the third port portion is located on the side of the valve seat, and the third port portion is fixedly connected to the first connecting pipe.

[0004] The control valve provided in this solution has a valve seat which is a three-way pipe fitting. Compared with the background technology, this solution reduces the material cost of the solenoid valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0005] Figure 1 : Background technology A schematic diagram of the structure of a control valve;

[0006] Figure 2 : The present invention provides a schematic cross-sectional view of the overall structure of a control valve;

[0007] Figure 3 : Figure 2 The enlarged schematic diagram of point I in the middle;

[0008] Figure 4 : Figure 2 Schematic diagram of the structure of the middle valve seat;

[0009] Figure 5a : Figure 2 Schematic diagram of the structure of the middle valve body;

[0010] Figure 5b : Figure 5a Top view of the valve body.

[0011] Figure 2-Figure 5b Explanation of symbols:

[0012] 1-valve body, 10-inner cavity of the valve body;

[0013] 11-first mounting hole, 12-second mounting hole;

[0014] 13- boss portion, 14- flange portion;

[0015] 15-threaded hole portion, 16-inner step portion;

[0016] 161- step wall of the inner step portion;

[0017] 17- bottom portion, 18- peripheral wall portion;

[0018] 2-valve seat, 20-valve port;

[0019] 21-tube body, 22-protruding portion, 23-second port portion;

[0020] 3-valve core component, 31-diaphragm;

[0021] 32-pilot valve seat, 320-pilot valve port;

[0022] 4-valve cover, 40-through hole;

[0023] 5-screw, 6-limiting ring;

[0024] 61-outer step portion, 611-step wall of the outer step portion;

[0025] 7-seal, 8-casing;

[0026] 9-moving iron core component, 91-moving iron core;

[0027] 92-pilot valve core;

[0028] A-first connection, B-second connection. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. The directional words such as upper and lower involved in this article are defined by the positions of the parts shown in the drawings relative to each other, just for the clarity and convenience of expressing the technical solution. It should be understood that the directional words used in this article should not limit the scope of protection requested by this application.

[0030] Figure 2The present invention provides a schematic cross-sectional view of the overall structure of a control valve; Figure 3 for Figure 2 The enlarged schematic diagram of point I in the middle; Figure 4 for Figure 2 Schematic diagram of the structure of the middle valve seat; Figure 5a for Figure 2 Schematic diagram of the structure of the middle valve body; Figure 5b for Figure 5a Top view of the valve body.

[0031] like Figure 2 As shown. The control valve includes a valve body 1, a valve seat 2, a valve core component 3 and a first connecting pipe A. The valve body 1 is roughly cup-shaped, specifically a stamped part made by stamping a metal sheet. The valve body 1 includes a bottom 17 and a peripheral wall portion 18. The peripheral wall portion 18 is roughly cylindrical, and the valve body 1 includes an inner cavity 10. The valve seat 2 is located in the inner cavity 10 of the valve body. The valve seat 2 is a metal three-way pipe fitting, including a first port portion located at its upper end, a second port portion 23 located at its lower end, and a third port portion located at its side. The first port portion serves as a valve port portion 20, and the valve core component 3 can abut against the valve port portion 20 to close the control valve. The second port portion is fixedly connected to the bottom 17, and the third port portion is fixedly connected to the first connecting pipe A.

[0032] As a specific embodiment, the valve seat 2 includes a tube body portion 21 and a protruding portion 22. The tube body portion 21 is cylindrical and extends in the longitudinal direction of the control valve. The tube body portion 21 includes the first port portion and the second port portion. The protruding portion 22 protrudes from the circumferential outer edge of the tube body portion 21. The protruding portion 22 is annular and serves as the third port portion. Of course, it is conceivable that the third port portion may also be a through hole portion (not shown) provided on the side of the tube body portion 21, which does not protrude, and the first connecting pipe A extends into the through hole portion and is fixedly connected thereto.

[0033] In this embodiment, the valve body 1 is roughly cup-shaped, the valve seat 2 is a three-way pipe fitting, and the valve seat 2 is located in the inner cavity 10 of the valve body. The valve body 1 and the valve seat 2 of the present application are combined to be equivalent to the valve body in the background technology, and the valve body in the background technology is made of brass castings. Compared with the background technology, the material consumption of this embodiment is reduced, which reduces the material cost of the solenoid valve.

[0034] Specifically, Figure 2 , Figure 4 , Figure 5aAs shown, the peripheral wall portion 18 of the valve body 1 includes a first mounting hole 11, which extends in the lateral direction of the control valve. The first connecting pipe A passes through the first mounting hole 11, and the first connecting pipe A is welded and fixed to the valve body 1, and the first connecting pipe A is welded and fixed to the above-mentioned protrusion 22. The first connecting pipe A is welded and fixed to the valve body 1 and the valve seat 2 respectively, so that the circumferential position of the valve seat 2 is determined; on the other hand, after the three are welded, the outlet flow channel of the control valve is formed.

[0035] More specifically, in this embodiment, the blank of the valve seat 2 is a straight tube, and the protrusion 22 is formed by stamping and flanging the straight tube, and the protrusion 22 is covered on a portion of the first connecting pipe A. Of course, it is conceivable that the blank of the valve seat 2 can be a three-way pipe directly, and the first connecting pipe A can also be covered with the protrusion 22.

[0036] like Figure 2 As shown, the first connecting pipe A and the protruding portion 22 are fixedly connected to form an outlet flow channel, and the inner diameter of the first connecting pipe A and the protruding portion 22 with a smaller inner diameter is defined as D1, and the diameter of the valve port 20 is defined as D2, then: D1 ≥ D2. This arrangement ensures that the outlet flow channel will not throttle the fluid flowing out of the valve port 20, thereby ensuring the flow performance of the control valve.

[0037] Further, the bottom 17 of the valve body 1 includes a boss portion 13, which protrudes upward in the longitudinal direction of the control valve and is formed by stamping. Specifically, along the longitudinal direction of the control valve, the outer contour of the orthographic projection of the boss portion 13 is circular, and the second port portion 23 of the tube body portion 21 is sheathed on the boss portion 13, so that the inner peripheral wall of the second port portion 23 and the outer peripheral wall of the boss portion 13 are tightly matched by press fitting, so that the lateral position of the valve seat 2 in the control valve is determined.

[0038] like Figure 2 , Figure 5a As shown, the control valve also includes a second connecting pipe B, and the peripheral wall portion 18 of the valve body 1 also includes a second mounting hole 12. The second mounting hole 12 extends in the lateral direction of the control valve, and the second connecting pipe B runs through the second mounting hole 12. In the actual production process of the control valve, the tube body portion 21 of the valve seat 2 and the boss portion 13 of the valve body 1 are first press-fitted, and then the first connecting pipe A is extended into the first mounting hole 11 and assembled with the protruding portion 22 of the valve seat 2, and the second connecting pipe B is extended into the second mounting hole 12. After the valve body 1, the valve seat 2, the first connecting pipe A, and the second connecting pipe B form an assembly, they are fixed by one-time furnace welding. In this way, while reducing the material cost of the solenoid valve, the main components of the solenoid valve are easy to assemble and the process is simple.

[0039] In order to cope with the design trend of lead-free, the control valve of the present application preferably has two schemes: ① The material of the valve body 1 is stainless steel, the material of the valve seat 2 is stainless steel, the material of the first connecting pipe A is stainless steel, and the material of the second connecting pipe B is stainless steel; ② The material of the valve body 1 is stainless steel, the material of the valve seat 2 is copper, the material of the first connecting pipe A is copper, and the material of the second connecting pipe B is copper. Such a design, on the one hand, realizes the lead-free of the product, and on the other hand, facilitates the one-time welding in the furnace.

[0040] Furthermore, the control valve of the present application further comprises a valve cover 4 and screws 5. The valve cover 4 is in the shape of a flat plate, and is specifically formed by stamping a metal plate. Figure 2 , Figure 5a , Figure 5b As shown, the peripheral wall portion 18 of the valve body 1 includes a flange portion 14, which protrudes outward along the radial direction of the control valve. The flange portion 14 includes a threaded hole portion 15. The screw 5 passes through the valve cover 4 and is threadedly matched with the threaded hole portion 15, so that the valve cover 4 is fixedly connected to the valve body 1.

[0041] As a specific implementation method, Figure 2 , Figure 3 As shown, the control valve of the present application also includes a limit ring 6 and a sealing member 7. The upper section of the valve body 1 includes an inner step portion 16 with a step surface facing upward, and the limit ring 6 is in a circular ring shape. The limit ring 6 is placed on the inner step portion 16. The valve core component 3 includes a diaphragm 31. During the opening process of the control valve, the diaphragm 31 can arch upward. The limit ring 6 can limit the upward arching stroke of the diaphragm 31, thereby preventing the diaphragm 31 from being affected by excessive deformation and affecting its service life. Further, the limit ring 6 includes an outer step portion 61 with a step surface facing upward, and the sealing member 7 is placed on the outer step portion 61. In this embodiment, the sealing member 7 is specifically an O-ring. Define the distance between the step wall 611 of the outer step portion 61 and the step wall 161 of the inner step portion 16 as h, and define the wire diameter of the sealing member 7 when not subject to external force as d, then it satisfies: h≤d. With such arrangement, after the seal 7 is longitudinally squeezed by the valve cover 4 , the seal 7 has sufficient deformation, so that it is closely attached to the step wall 611 of the outer step portion 61 and the step wall 161 of the inner step portion 16 , thereby improving the sealing performance.

[0042] like Figure 2 As shown, the control valve of this embodiment further includes a sleeve 8 and a moving iron core component 9. The sleeve 8 is a stainless steel pipe, the lower section of the sleeve 8 extends into the through hole 40 of the valve cover 4, and the sleeve 8 is welded and fixed to the hole wall of the through hole 40. The moving iron core component 9 includes a moving iron core 91 and a pilot valve core 92. The moving iron core 91 is located in the inner cavity of the sleeve 8. Along the axial direction of the sleeve 8, the moving iron core 91 can slide relative to the sleeve 8, and the moving iron core 91 is limitedly connected with the pilot valve core 92. The valve core component 3 also includes a pilot valve seat 32, and the pilot valve core 92 can abut against the pilot valve seat 32 to close the pilot valve port 320 located on the pilot valve core 92.

[0043] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A control valve, characterized in that: It includes a valve body, a valve seat, a valve core component and a first connecting pipe, the valve body is cup-shaped, the valve seat is a three-way pipe fitting, the valve seat is located in the inner cavity of the valve body, the valve seat includes a first port portion, a second port portion and a third port portion, the first port portion serves as a valve mouth portion, the valve core component can be abutted against the valve mouth portion, the second port portion is fixedly connected to the bottom of the valve body, the third port portion is located on the side of the valve seat, and the third port portion is fixedly connected to the first connecting pipe.

2. The control valve according to claim 1, characterized in that The valve seat includes a tube body portion and a protruding portion, the tube body portion is cylindrical, the tube body portion extends in the longitudinal direction of the control valve, the tube body portion includes the first port portion and the second port portion, the protruding portion protrudes from the circumferential outer edge of the tube body portion, the protruding portion is annular, and the protruding portion serves as the third port portion.

3. The control valve according to claim 2, characterized in that The peripheral wall portion of the valve body comprises a first mounting hole, the first connecting pipe passes through the first mounting hole, the first connecting pipe is welded and fixed to the valve body, and the first connecting pipe is welded and fixed to the protruding portion.

4. The control valve according to claim 2, characterized in that The bottom of the valve body includes a boss portion, which protrudes upward along the longitudinal direction of the control valve. The second port portion is sleeved on the boss portion, and the inner peripheral wall of the second port portion is tightly matched with the outer peripheral wall of the boss portion.

5. The control valve according to claim 4, characterized in that The valve body is made of stamping metal sheet, the boss portion is formed by stamping, the control valve also includes a second connecting pipe, the peripheral wall portion of the valve body also includes a second mounting hole, the second connecting pipe passes through the second mounting hole, and the valve body, the valve seat, the first connecting pipe and the second connecting pipe are fixedly connected by furnace welding.

6. The control valve according to claim 5, characterized in that The valve body is made of stainless steel, the valve seat is made of stainless steel, the first connecting pipe is made of stainless steel, and the second connecting pipe is made of stainless steel; Alternatively, the valve body is made of stainless steel, the valve seat is made of copper, the first connecting pipe is made of copper, and the second connecting pipe is made of copper.

7. The control valve according to claim 2, characterized in that Define the inner diameter of the smaller one of the first connecting pipe and the protruding portion as D1, and the diameter of the valve port as D2, then: D1≥D2.

8. The control valve according to any one of claims 1 to 7, characterized in that: It also includes a valve cover and a screw. The valve cover is in a flat plate shape. The peripheral wall of the valve body includes a flange portion. The flange portion includes a threaded hole portion. The screw passes through the valve cover and is threadedly matched with the threaded hole portion.

9. The control valve according to any one of claims 1 to 7, characterized in that: It also includes a valve cover, a limit ring and a sealing member, wherein the valve cover is in the shape of a flat plate, the peripheral wall of the valve body includes an inner step portion with a step surface facing upward, the limit ring is in the shape of a circular ring, the limit ring is placed on the inner step portion, the valve core component includes a diaphragm, the limit ring can limit the upward stroke of the diaphragm, the limit ring includes an outer step portion with a step surface facing upward, the sealing member is placed on the outer step portion, and the distance between the step wall of the outer step portion and the step wall of the inner step portion is defined as h, and the wire diameter of the sealing member when not subject to external force is d, then: h≤d is satisfied.

10. The control valve according to claim 9, characterized in that It also includes a sleeve and a moving iron core component, the sleeve is fixedly connected to the valve cover, the moving iron core component includes a moving iron core and a pilot valve core, the moving iron core is located in the inner cavity of the sleeve, and along the axial direction of the sleeve, the moving iron core can slide relative to the sleeve, the moving iron core is limitedly connected to the pilot valve core, and the valve core component also includes a pilot valve seat, and the pilot valve core can be against the pilot valve seat.

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