Flow regulating valve

Abstract

The application provides a flow regulating valve, comprising: a valve seat part, the valve seat part has an interface in the radial direction and a valve port in the axial direction; a valve head movably arranged in the cavity of the valve seat part to open or close the valve port; a connecting pipe, one end of the connecting pipe is a mounting end, the mounting end penetrates into the cavity of the valve seat part from the interface, and the inner wall surface of the opening of the mounting end is an annular flow guide surface; the flow guide surface is located at one end of the end surface of the mounting end, and the flow guide surface is located at one end inside the connecting pipe; in the direction from the inner end to the outer end, the radial dimension of the flow guide surface gradually decreases; wherein the distance between the flow guide surface and the outer wall surface of the connecting pipe at the inner end is a, the distance between the flow guide surface and the outer wall surface of the connecting pipe at the outer end is b, the distance between the inner end and the outer end is c, 0.1b<=a<=0.5b, and 0.5b<=c<=4b. Through the technical scheme provided by the application, the problem of large flow resistance in the valve seat part in the prior art can be solved.

Description

Technical Field

[0001] This invention relates to the field of flow control valve technology, and more specifically, to a flow control valve. Background Technology

[0002] Currently, for flow control valves in existing technologies, such as electronic expansion valves, pipes A and B are generally set at the radial interface and axial valve port of the valve body and valve seat. The two ends of pipe A at the radial interface are provided with small rounded corners and chamfers to remove burrs and other defects generated during material feeding.

[0003] When the outer diameter of pipe A is similar to the diameter of the valve body and valve seat, due to the influence of the intersection line, the end face of pipe A, which is connected to the radial interface of the valve body and valve seat, is closer to the valve head. When the fluid flows through, it will generate a large flow resistance, affecting the flow capacity of the flow control valve. The effect is more obvious when the flow control valve is fully open. Summary of the Invention

[0004] This invention provides a flow regulating valve to solve the problem of high flow resistance in the prior art.

[0005] To address the aforementioned problems, this invention provides a flow regulating valve, comprising: a valve seat portion having a radial interface and an axial valve port; a valve head movably disposed within the cavity of the valve seat portion to open or close the valve port; and a connecting pipe, one end of which is a mounting end, extending through the interface into the cavity of the valve seat portion, the inner wall surface of the opening of the mounting end being an annular guide surface; the end of the guide surface located on the end face of the mounting end being the inner end, and the end of the guide surface located inside the connecting pipe being the outer end, wherein the radial dimension of the guide surface gradually decreases from the inner end to the outer end; wherein the distance between the guide surface at the inner end and the outer wall surface of the connecting pipe is 'a', the distance between the guide surface at the outer end and the outer wall surface of the connecting pipe is 'b', the distance between the inner end and the outer end is 'c', 0.1b≤a≤0.5b, and 0.5b≤c≤4b.

[0006] Furthermore, 0.25b≤a≤0.4b.

[0007] Furthermore, b ≤ c ≤ 3b.

[0008] Furthermore, the guide surface is a conical or arc-shaped surface.

[0009] Furthermore, a = c = 0.5b, and the guide surface forms a rounded corner.

[0010] Furthermore, the flow regulating valve also includes: a guide sleeve disposed in the cavity of the valve seat, the valve head being movably disposed in the guide sleeve, and the mounting end abutting against the guide sleeve.

[0011] Furthermore, the guide sleeve includes a first sleeve segment and a second sleeve segment. The outer diameter of the second sleeve segment is smaller than that of the first sleeve segment. The lower end faces of the second sleeve segment and the first sleeve segment are connected. The second sleeve segment is closer to the valve port than the first sleeve segment, and the mounting end abuts against the first sleeve segment. In the axial direction of the valve head, the guide surface is located on the side of the lower end face facing the valve port.

[0012] Furthermore, the flow regulating valve also includes: a valve needle assembly, which includes a screw, a bearing, and a bushing. The screw includes a first rod section, a second rod section, and a third rod section connected in sequence. The outer diameter of the first rod section is larger than the outer diameter of the second rod section, and the outer diameter of the second rod section is larger than the outer diameter of the third rod section. The bearing is sleeved on the second rod section. The bushing is sleeved on the third rod section, and the bushing and the third rod section are fixedly connected. The two end faces of the inner ring of the bearing abut against the end faces of the first rod section and the bushing, respectively. The bearing is located in the cavity of the valve head.

[0013] Furthermore, along the axial direction of the screw, the length of the second segment is M, the length of the inner ring is N, and N / 2 ≤ M < N.

[0014] Furthermore, the flow control valve is an electronic expansion valve.

[0015] The present invention provides a flow regulating valve, comprising: a valve seat portion having a radial interface and an axial valve port; a valve head movably disposed within the cavity of the valve seat portion to open or close the valve port; and a connecting pipe, one end of which is a mounting end, extending into the cavity of the valve seat portion through the interface, the inner wall surface of the opening of the mounting end being an annular guide surface; the end of the guide surface located on the end face of the mounting end being the inner end, and the end of the guide surface located inside the connecting pipe being the outer end, wherein the radial dimension of the guide surface gradually decreases from the inner end to the outer end; wherein the distance between the guide surface at the inner end and the outer wall surface of the connecting pipe is a, the distance between the guide surface at the outer end and the outer wall surface of the connecting pipe is b, the distance between the inner end and the outer end is c, 0.1b≤a≤0.5b, 0.5b≤c≤4b. This design reduces the flow resistance of fluid flowing through the pipe mounting end by using an annular guide surface on the inner wall of the mounting end opening, with its radial dimension gradually decreasing from the inner end to the outer end. This improves the flow capacity of the control valve. Furthermore, by defining distances a, b, and c, the guide surface can be configured as an arc surface, a cone surface, or other forms. The values ​​of a, b, and c can be adjusted according to the actual usage of the control valve, thus adaptively adjusting the guide surface and further improving the performance of the control valve. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0017] Figure 1 A schematic diagram of the flow regulating valve provided in one embodiment of the present invention is shown;

[0018] Figure 2 It shows Figure 1 A magnified view of the selected location;

[0019] Figure 3 A schematic diagram of the pipe fitting structure in this embodiment is shown;

[0020] Figure 4 This diagram shows a schematic of the connecting pipe structure in the flow regulating valve provided in Embodiment 2.

[0021] Figure 5 A schematic diagram of the connecting pipe structure in the flow regulating valve provided in this embodiment 3 is shown.

[0022] The above figures include the following reference numerals:

[0023] 10. Valve seat; 12. Valve port; 20. Valve head; 30. Connecting pipe; 32. Guide surface; 33. Inner end; 34. Outer end; 40. Guide sleeve; 41. First sleeve section; 42. Second sleeve section; 43. Lower end face; 50. Valve needle assembly; 51. Screw; 52. Bearing; 53. Bushing. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0025] like Figures 1 to 3As shown, Embodiment 1 of the present invention provides a flow regulating valve, comprising: a valve seat portion 10, the valve seat portion 10 having an interface in the radial direction and a valve port 12 in the axial direction; a valve head 20, movably disposed within the cavity of the valve seat portion 10 to open or close the valve port 12; and a connecting pipe 30, one end of which is a mounting end, the mounting end passing through the interface into the cavity of the valve seat portion 10, the inner wall surface of the opening of the mounting end being an annular flow guiding surface 32; the flow guiding surface 32 being located at the end of the mounting end. One end of the guide surface 32 is the inner end 33, and the other end of the guide surface 32 located inside the pipe 30 is the outer end 34. The radial dimension of the guide surface 32 gradually decreases from the inner end 33 to the outer end 34. The distance between the guide surface 32 at the inner end 33 and the outer wall of the pipe 30 is a, the distance between the guide surface 32 at the outer end 34 and the outer wall of the pipe 30 is b, and the distance between the inner end 33 and the outer end 34 is c. 0.1b≤a≤0.5b, 0.5b≤c≤4b.

[0026] like Figure 1 As shown, in this embodiment, a connecting pipe 30 is connected to the radial interface of the valve seat 10. The end of the connecting pipe 30 that enters the valve seat 10 near the valve head 20 is the mounting end. The inner wall surface of the mounting end opening is an annular guide surface 32 whose radial dimension gradually decreases from the inner end 33 to the outer end 34, and the specific shape of the guide surface 32 is defined by the relationship between distances a, b, and c. By adopting this scheme, the annular guide surface 32, whose radial dimension gradually decreases from the inner end 33 to the outer end 34, provided on the inner wall surface of the mounting end opening, reduces the flow resistance generated when fluid flows through the mounting end of the connecting pipe 30, improves the flow capacity of the control valve, increases the flow rate, and can also be used to remove burrs and flanges generated during material feeding. Furthermore, the values ​​of a, b, and c can be adjusted according to the actual use of the control valve, thereby adaptively adjusting the guide surface 32 and further improving the performance of the control valve.

[0027] The distance between the inner end 33 and the outer end 34 can also be understood as the axial length of the guide surface 32.

[0028] Specifically, 0.25b≤a≤0.4b. This further limits the distance 'a' between the inner end 33 and the outer wall of the connecting pipe 30 and the distance 'b' between the outer end 34 and the outer wall of the connecting pipe 30, thereby further reducing fluid resistance and improving the flow capacity of the regulating valve.

[0029] Furthermore, b≤c≤3b. This further limits the distance b between the outer end 34 and the outer wall of the connecting pipe 30, and the distance c between the inner end 33 and the outer end 34, further reducing fluid resistance and improving the flow capacity of the control valve.

[0030] like Figure 3As shown, the guide surface 32 can be specifically configured as a conical surface. By configuring the guide surface 32 as a conical surface, a smooth transition of the flow area can be achieved, thereby reducing the flow resistance generated when the fluid passes through.

[0031] Specifically, the flow control valve also includes a guide sleeve 40, disposed within the cavity of the valve seat portion 10, with the valve head 20 movably disposed within the guide sleeve 40, and the mounting end abutting against the guide sleeve 40. The guide sleeve 40 guides the valve head 20, preventing it from shifting during movement and thus avoiding interference with the control valve's operation. Furthermore, the abutting between the mounting end and the guide sleeve 40 ensures the appropriate distance between the mounting end of the connecting pipe 30 and the valve head 20, preventing excessive flow resistance caused by the mounting end of the connecting pipe 30 being too close to the valve head 20, and ensuring sufficient depth of penetration of the mounting end into the valve seat portion 10, thus improving connection reliability.

[0032] like Figure 1 As shown, the guide sleeve 40 includes a first sleeve segment 41 and a second sleeve segment 42. The outer diameter of the second sleeve segment 42 is smaller than the outer diameter of the first sleeve segment 41. The lower end face 43 of the second sleeve segment 42 and the first sleeve segment 41 are connected. The second sleeve segment 42 is closer to the valve port 12 relative to the first sleeve segment 41, and the mounting end abuts against the first sleeve segment 41. In the axial direction of the valve head 20, the guide surface 32 is located on the side of the lower end face 43 facing the valve port 12. In this embodiment, the guide sleeve 40 consists of the second sleeve segment 42, the lower end face 43, and the first sleeve segment 41 from bottom to top. The first sleeve segment 41 abuts against the mounting end to ensure that the mounting end does not approach the valve head 20. In the connecting pipe 30, the guide surface 32 is located on the side of the lower end face 43 facing the valve port 12. The abutment between the mounting end and the first sleeve segment 41 also determines the specific position of the guide surface 32 within the valve seat portion 10. In this design, the guide surface 32 is positioned on the side of the lower end face 43 facing the valve port 12. This avoids the side of the first sleeve section 41 and the lower end face 43 from blocking the fluid flowing through the guide surface 32, thus preventing resistance to the fluid and ensuring smooth fluid flow.

[0033] Specifically, the flow regulating valve further includes: a valve needle component 50, which includes a screw 51, a bearing 52, and a bushing 53. The screw 51 includes a first rod segment, a second rod segment, and a third rod segment connected in sequence. The outer diameter of the first rod segment is larger than the outer diameter of the second rod segment, and the outer diameter of the second rod segment is larger than the outer diameter of the third rod segment. The bearing 52 is sleeved on the second rod segment. The bushing 53 is sleeved on the third rod segment, and the bushing 53 and the third rod segment are fixedly connected. The two end faces of the inner ring of the bearing 52 abut against the end faces of the first rod segment and the end faces of the bushing 53, respectively. The bearing 52 is located in the cavity of the valve head 20.

[0034] In this embodiment, the third rod segment is the bushing 53 mounting segment, which is fitted with the inner hole of the bushing 53 with clearance, transition, or interference. One end of the bushing 53 abuts against the inner ring of the bearing 52 and can be fixed to the screw 51 as a whole by welding. The second rod segment is the bearing 52 mounting segment, which is fitted with the inner ring of the bearing 52 with clearance, transition, or interference. The two ends of the inner ring of the bearing 52 abut against the end face of the first rod segment and the bushing 53, respectively. In this way, the bushing 53 realizes the axial limitation of the inner ring of the bearing 52, avoiding the excessive force and deformation of the inner ring of the bearing 52 caused by other limiting methods, ensuring the reliability of the bearing 52 and improving the performance of the regulating valve.

[0035] Furthermore, in the axial direction of the screw 51, the length of the second segment is M, and the length of the inner ring of the bearing 52 is N, where N / 2 ≤ M < N. The length of the second segment is slightly less than the length of the inner ring of the bearing 52, which ensures that the bushing 53 abuts against the bearing 52 and prevents the bearing 52 from moving axially.

[0036] like Figure 4 As shown, Embodiment 2 of the present invention provides a flow regulating valve. The difference between Embodiment 2 and Embodiment 1 is that the guide surface 32 is an arc surface. In this embodiment, setting the guide surface 32 as an arc surface reduces the flow resistance generated when the fluid passes through and increases the contact area between the fluid and the installation end of the connector 30 when the fluid flows in.

[0037] like Figure 5 As shown, Embodiment 3 of the present invention provides a flow regulating valve. The difference between Embodiment 3 and Embodiment 1 is that a = c = 0.5b, and the guide surface 32 forms a rounded corner. The rounded corner is a specific form of the arc surface in Embodiment 2, which can also reduce the flow resistance and increase the contact area between the fluid and the installation end of the connector 30 when the fluid flows in, thereby increasing the fluid flow area. The difference is that the design and processing of the rounded corner is simpler than that of the arc surface.

[0038] Specifically, the flow regulating valve in the above embodiment is an electronic expansion valve. Using this embodiment, the annular guide surface 32, whose radial dimension gradually decreases from the inner end 33 to the outer end 34, is provided on the inner wall of the mounting end opening. This reduces the flow resistance generated when fluid flows through the mounting end of the connector 30, improving the flow capacity of the electronic expansion valve and increasing the flow rate. Furthermore, by adjusting the distances a, b, and c, the guide surface 32 can be configured as an arc surface, a cone surface, or other forms. In specific designs, the values ​​of a, b, and c can be adjusted according to the actual usage of the electronic expansion valve, thereby adaptively adjusting the guide surface 32 and further improving the performance of the electronic expansion valve.

[0039] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A flow regulating valve, characterized in that, include: The valve seat portion (10) has an interface in the radial direction and a valve port (12) in the axial direction. The valve head (20) is movably disposed in the cavity of the valve seat (10) to open or close the valve port (12). The connector (30) has one end as an installation end, which is inserted into the cavity of the valve seat (10) through the interface. The inner wall surface of the opening of the installation end is an annular flow guide surface (32). The end of the flow guide surface (32) located on the end face of the installation end is the inner end (33), and the end of the flow guide surface (32) located inside the connector (30) is the outer end (34). The radial dimension of the flow guide surface (32) gradually decreases from the inner end (33) to the outer end (34). Wherein, the distance between the inner end (33) of the guide surface (32) and the outer wall of the pipe (30) is a, the distance between the outer end (34) of the guide surface (32) and the outer wall of the pipe (30) is b, the distance between the inner end (33) and the outer end (34) is c, 0.1b≤a≤0.5b, 0.5b≤c≤4b.

2. The flow regulating valve according to claim 1, characterized in that, 0.25b≤a≤0.4b.

3. The flow regulating valve according to claim 1, characterized in that, b≤c≤3b.

4. The flow regulating valve according to claim 1, characterized in that, The guide surface (32) is a conical surface or an arc surface.

5. The flow regulating valve according to claim 1, characterized in that, a=c=0.5b, and the guide surface (32) forms a rounded corner.

6. The flow regulating valve according to claim 1, characterized in that, The flow regulating valve also includes: A guide sleeve (40) is disposed in the cavity of the valve seat portion (10), and the valve head (20) is movably disposed in the guide sleeve (40). The mounting end abuts against the guide sleeve (40).

7. The flow regulating valve according to claim 6, characterized in that, The guide sleeve (40) includes a first sleeve segment (41) and a second sleeve segment (42). The outer diameter of the second sleeve segment (42) is smaller than the outer diameter of the first sleeve segment (41). The lower end face (43) of the second sleeve segment (42) and the first sleeve segment (41) are connected. The second sleeve segment (42) is closer to the valve port (12) relative to the first sleeve segment (41). The mounting end abuts against the first sleeve segment (41). In the axial direction of the valve head (20), the guide surface (32) is located on the side of the lower end face (43) facing the valve port (12).

8. The flow regulating valve according to claim 1, characterized in that, The flow regulating valve also includes: The valve needle component (50) includes a screw (51), a bearing (52), and a bushing (53). The screw (51) includes a first rod segment, a second rod segment, and a third rod segment connected in sequence. The outer diameter of the first rod segment is larger than the outer diameter of the second rod segment, and the outer diameter of the second rod segment is larger than the outer diameter of the third rod segment. The bearing (52) is sleeved on the second rod segment. The bushing (53) is sleeved on the third rod segment. The bushing (53) and the third rod segment are fixedly connected. The two end faces of the inner ring of the bearing (52) abut against the end faces of the first rod segment and the end faces of the bushing (53), respectively. The bearing (52) is located in the cavity of the valve head (20).

9. The flow regulating valve according to claim 8, characterized in that, In the axial direction of the screw (51), the length of the second rod segment is M, the length of the inner ring is N, and N / 2≤M<N.

10. The flow regulating valve according to claim 1, characterized in that, The flow regulating valve is an electronic expansion valve.

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