Control valve

Abstract

A first flow channel section and a second flow channel section are perpendicularly arranged, the first flow channel section comprises a first large-diameter section and a first small-diameter section, the first large-diameter section is connected with a first transition section, the second flow channel section comprises a first flow expanding section and a first throttling section, the first throttling section is located between the first transition section and the first flow expanding section, and the first flow expanding section is connected with the first small-diameter section. The flow area of the first flow expanding section is larger than the flow area of the first outlet, the flow area of the first flow expanding section is larger than the flow area of the first throttling section, the flow area of the first large-diameter section is larger than or equal to the flow area of the first throttling section, and the flow area of the first large-diameter section is larger than the flow area of the first small-diameter section. The flow area of the first throttling section is larger than that of the first small-diameter section. The technical problem that fluid pressure loss is large can be solved.

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] Figure 1 Shown is an exploded schematic diagram of a partial structure of a control valve of the background technology.

[0003] like Figure 1 As shown, the control valve includes a valve body component, which includes a valve body 010, a first pipe part 01, a second pipe part 02 and a third pipe part 03, and a valve core ball 04 can rotate under the drive of a valve stem 05. The valve core ball 04 includes an inlet (not shown), a first outlet 042 and a second outlet 043. As shown in the figure, the inlet is connected to the first pipe part 01 and is arranged opposite to the inlet of the first pipe part 01. The central axes of the second tube part 02 and the third tube part 03 are in the same straight line and are arranged horizontally. Driven by the valve stem 05, by rotating the valve core ball 04, the control valve has three working modes. In the first working mode, the fluid entering from the first tube part 01 only flows out from the second tube part 02 after passing through the first outlet 042; in the second working mode, the fluid entering from the first tube part 01 only flows out from the third tube part 03 after passing through the second outlet 043; in the third working mode, the fluid entering from the first tube part 01 can flow out from the first tube part 02 and the third tube part 03, and by controlling the rotation angle of the valve core ball 04 relative to the valve body 01, the flow rate of the fluid flowing out from the second tube part 02 and the second connecting tube 03 can be controlled.

[0004] During the research and development process, the applicant discovered that different customers have different requirements for the shapes of the second connecting pipe and the third connecting pipe in order to meet installation needs. When the second pipe portion 02 and the third connecting pipe 03 are 90-degree bends according to installation requirements, how to improve the flow loss of the fluid in the control valve is a technical problem that technical personnel in this field are concerned about. Summary of the invention

[0005] The object of the present invention is to provide a control valve capable of improving the technical problem of large fluid pressure loss.

[0006] The control valve provided by the present invention comprises a valve body component and a valve core, the valve body component comprises a valve cavity, the valve core is arranged in the valve cavity, the valve core comprises an inlet and a first outlet, the valve body component comprises a fluid inlet port, an inlet flow channel, a first outflow port and a first outflow channel, the first outflow channel comprises a first flow channel section, a second flow channel section and a first transition section, the first flow channel section and the second flow channel section are arranged vertically, the first flow channel section comprises a first large diameter section and a first small diameter section, the first large diameter section is connected to the first transition section, the opening of the first small diameter section away from the first transition section serves as the first outflow port, the second flow channel section comprises a first expansion section and a first throttling section, the first throttling section is located between the first transition section and the first expansion section,

[0007] The flow area of ​​the first expansion section is greater than the flow area of ​​the first outlet, the flow area of ​​the first expansion section is greater than the flow area of ​​the first throttling section, the flow area of ​​the first large diameter section is greater than or equal to the flow area of ​​the first throttling section, the flow area of ​​the first large diameter section is greater than the flow area of ​​the first small diameter section, and the flow area of ​​the first throttling section is greater than the flow area of ​​the first small diameter section.

[0008] The control valve of the above scheme can reduce the turbulence and negative pressure of the fluid flow, reduce the pressure loss of the fluid, and improve the flow capacity of the control valve by optimizing the flow channels of various parts in the first outflow channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 : Background technology An exploded schematic diagram of a partial structure of a control valve;

[0010] Figure 2 : A cross-sectional schematic diagram of the control valve of the first embodiment of the present invention in the first working state;

[0011] Figure 3 : A cross-sectional schematic diagram of the control valve of the first embodiment of the present invention in the second working state;

[0012] Figure 4 : A schematic diagram of the partial structure of the control valve in the third working state according to the first embodiment of the present invention;

[0013] Figure 5 : Figure 2 A schematic diagram of the three-dimensional structure of a valve core of the control valve shown in FIG.

[0014] Figure 6 : A schematic diagram of the partial structure of a control valve according to the second embodiment of the present invention;

[0015] Figure 7: Schematic structural diagram of the control valve in the third embodiment given by the present invention in the first working state;

[0016] Figure 8 : Figure 7 Schematic cross-sectional view of a section when the control valve shown is viewed from the left. Detailed implementation manners

[0017] To enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0018] It should be noted here that the upper and lower orientation words involved in this article are defined based on the Figure 2 position of the components in the figure and the position between the components relative to each other, only for the sake of clarity and convenience in expressing the technical solution. It should be understood that the orientation words adopted in this article should not limit the scope claimed in this application.

[0019] As Figure 2 shown, the control valve includes a valve body component, a driving component 10, a transmission component 20, and a spool component.

[0020] For the control valve in this embodiment, the driving component 10 includes a motor 11. The motor 11 is in transmission connection with the transmission component 20. The transmission component 20 includes an input gear 21, a gear ring 22, and a gear set 23. The gear set 23 has an output gear rack 231. The output gear rack 231 is in transmission connection with the valve stem part 30 of the control valve. The spool component includes a spool 40. The driving component 10 drives the gear set 23 of the transmission component 20 to rotate, so that the output gear rack 231 drives the valve stem part 30 to rotate, and the valve stem part 30 drives the spool 40 to rotate.

[0021] It should be noted that the above description of the driving component 10, the transmission component 20, and the valve stem part 30 is only the specific structure in one embodiment of the control valve of this application. For example, the driving component 10 is not limited to the Figure 2 structure shown above, and it can also be the Figure 6 structure of the control valve shown in the second embodiment in Figure 6 shown. The driving component 10A of the control valve shown includes a rotor 11A and a transmission component 12A in transmission connection with the rotor 11A. The transmission component 12A is in transmission connection with the input gear 21A. The rotor 11A can rotate under the drive of a coil (not shown). Among them, the transmission component 12A and the input gear 21A are not the core invention details of this application and are correspondingly recorded in the prior patents of the applicant of this patent, and will not be repeated here.

[0022] The valve stem part 30 is also not limited to Figure 1The rod shown in the figure can also be integrally formed with the output gear frame 231, and a part of it after forming is used as the valve stem 30 that cooperates with the valve core 40. Alternatively, the valve stem 30 is integrally formed with the valve core 40, and the formed parts are partly used as the valve stem 30 and partly as the valve core 40. The core or focus of this application is to optimize the internal flow channel structure of the control valve. Therefore, the implementation methods of the drive components and the transmission components are no longer shown one by one. The optimization of the internal flow channel of the control valve, which is the core of this application, is described in detail below.

[0023] In the control valve of the present application, the fluid flows more smoothly and the fluid pressure loss is small during the process of the fluid flowing out of the control valve from the inner cavity of the valve core. The specific introduction is as follows:

[0024] The control valve of this application, such as Figure 2-Figure 5 As shown, the valve core 40 includes an inlet 43, a first outlet 41 and a second outlet 42, which are connected to each other. The cavity for fluid flow located on the surface of the valve core 40 is defined as a valve core cavity 400, and the valve core cavity 400 is connected to the inlet 43, the first outlet 41 and the second outlet 42. When the valve core 40 is used as a component, the valve core cavity 400 is a hollow cavity connected to the inlet 43, the first outlet 41 and the second outlet 42.

[0025] The control valve includes a valve body component 50, the valve body component 50 includes a valve cavity 500, and the valve core 40 is located in the valve cavity 500. The valve body component 50 includes a fluid inlet port 503, a first outflow port 501, a second outflow port 502, an inlet flow channel 530, a first outflow channel 510, and a second outflow channel 520. The inlet flow channel 530 allows the fluid inlet port 503 to flow to the inlet 43 of the valve core 40. The first outflow channel 510 allows the fluid in the valve core cavity 400 to flow to the first outflow port 501, and the second outflow channel 520 allows the fluid in the valve core cavity 400 to flow to the second outflow port 502.

[0026] The control valve includes three working modes. In the first working mode, the fluid inlet port 503, the inlet flow channel 530, the valve core chamber 400, the first outlet 41, the first outflow channel 510 and the first outflow port 501 are connected, while the valve core chamber 400 and the second outflow port 502 are not connected; in the second working mode, the fluid inlet port 503, the inlet flow channel 530, the valve core chamber 400, the second outlet 42, the second outflow channel 520 and the second outflow port 502 are connected, while the valve core chamber 400 and the first outflow port 501 are not connected; in the third working mode, the fluid inlet port 503, the inlet flow channel 530, the valve core chamber 400, the first outlet 41, the first outflow channel 510 and the first outflow port 501 are connected, and the fluid inlet port 503, the inlet flow channel 530, the valve core chamber 400, the second outlet 42, the second outflow channel 520 and the second outflow port 502 are also connected. That is, in the third working mode, part of the fluid that enters the valve core chamber 400 from the fluid inlet port 503 flows out from the first outflow port 501 , and part of the fluid flows out from the second outflow port 502 .

[0027] like Figure 2-5 As shown, in this embodiment, the first outflow port 501 and the second outflow port 502 have the same orientation, that is, the first outflow port 501 and the second outflow port 502 are both circular. Figure 2 As shown, both are facing upward, and the central axes of the two are parallel. The fluid inlet port 503 is located on the lower side of the valve core 40, and the first outflow port 501 and the second outflow port 502 are located on the upper side of the valve core 40. In the first working mode, the direction of the first outlet 41 is perpendicular to the direction of the first outflow port 501, that is, if the first outlet 41 and the first outflow port 501 are both circular, the central axes of the two are perpendicular. It should be noted that the "vertical" here is not the absolute vertical in the geometric concept. In the actual production process, affected by the processing or assembly errors of parts, the central axes of the first outlet 41 and the first outflow port 501 are generally perpendicular, and a certain deviation is allowed.

[0028] Similarly, in the second working mode, the direction of the second outlet 42 is perpendicular to the direction of the second outflow port 502 , that is, if the second outlet 42 and the second outflow port 502 are both circular, their central axes are perpendicular.

[0029] Therefore, no matter in the first working mode, the second working mode or the third working mode, the fluid flowing out of the control valve from the valve core chamber 400 passes through a nearly 90-degree turn in the first outflow channel 510 and / or the second outflow channel 520. That is, in the first working mode, the fluid coming out of the valve core chamber 400 passes through a nearly 90-degree turn in the first outflow channel 510, in the second working mode, the fluid coming out of the valve core chamber 400 passes through a nearly 90-degree turn in the second outflow channel 520, and in the third working mode, the fluid coming out of the valve core chamber 400 passes through a nearly 90-degree turn in both the first outflow channel 510 and the second outflow channel 520. To this end, in order to improve the pressure loss caused by turbulence during the fluid outflow process, the control valve of this scheme designs the internal flow area of ​​the first outflow channel 510 and / or the second outflow channel 520 as follows:

[0030] As shown in the figure, the first outflow channel 510 includes a first flow channel section 5110, a second flow channel section 5120 and a first transition section 5130. In the radial direction of the first flow channel section 5110, that is, Figure 2 In the circumferential direction shown, the cross section of the first flow channel section 5110 is circular, and in the radial direction of the second flow channel section 5120, the cross section of the second flow channel section 5120 is circular, the central axis of the first flow channel section 5110 is perpendicular to the central axis of the second flow channel section 5120, the inner wall and the outer wall of the first transition section 5130 are arc-shaped, the inner wall of the first transition section 5130 is tangent to the inner wall of the end of the first flow channel section 5110 connected to the first transition section 5130, and the inner wall of the first transition section 5130 is tangent to the inner wall of the end of the second flow channel section 5120 connected to the first transition section 5130, and the first transition section 5130 connects the first flow channel section 5110 and the second flow channel section 5120. The opening of the end of the first flow channel section 5110 away from the first transition section 5130 serves as the aforementioned first outflow port 501.

[0031] The first flow channel section 5110 includes a first large diameter section 5111 and a first small diameter section 5112. The first large diameter section 5111 is connected to the first transition section 5130. The opening of the first small diameter section 5112 away from the first transition section 5130 serves as the first outflow port 501. The flow area of ​​the first large diameter section 5111 is greater than the flow area of ​​the first small diameter section 5112. In this embodiment, the cross-sectional profile of the inner wall of the first large diameter section 5111 is circular, and the cross-sectional profile of the inner wall of the first small diameter section 5112 is circular. The inner diameter of the first large diameter section 5111 is defined as A, and the inner diameter of the first small diameter section 5112 is defined as C, then A>C.

[0032] In this embodiment, a first positioning portion W is further provided between the first large diameter section 5111 and the first small diameter section 5112 by means of dotting, that is, by dotting from the outside to the inside, one or more convex points are formed which are convex inwardly relative to the inner wall of the first small diameter section 5112 as the first positioning portion W. Of course, the structure or shape of the first positioning portion W is not limited thereto. When an external pipe needs to be connected to the first small diameter section 5112, the first positioning portion W can limit the depth of the external pipe inserted into the first small diameter section 5112 and minimize the influence on the flow area of ​​the first small diameter section 5112.

[0033] The second flow channel section 5120 includes a first expansion section 5121 and a first throttling section 5122 . The first throttling section 5122 is connected to the first transition section 5130 . The first throttling section 5122 is located between the first transition section 5130 and the first expansion section 5121 .

[0034] The flow area of ​​the first expansion section 5121 is greater than the flow area of ​​the first small diameter section 5112, the flow area of ​​the first expansion section 5121 is greater than the flow area of ​​the first throttling section 5122, the flow area of ​​the first large diameter section 5111 is greater than or equal to the flow area of ​​the first throttling section 5122, and the flow area of ​​the first throttling section 5122 is greater than the flow area of ​​the first small diameter section 5112. In this way, when the fluid flowing in from the inlet 43 of the valve core 40 flows out from the first outflow port 501, the fluid flows through the first expansion section 5121, then flows through the first throttling section 5122, and then passes through the first large diameter section 5111 and the first small diameter section 5112. In this process, by optimizing the flow area of ​​the internal flow channel of the first outflow channel 510, the turbulence and negative pressure of the fluid can be reduced, and the pressure loss of the fluid can be reduced, that is, the flow capacity of the control valve can be improved without changing the valve core size of the control valve.

[0035] As shown in the figure, the second outflow channel 520 includes a third flow channel section 5230, a fourth flow channel section 5240 and a second transition section 5250. In the radial direction of the third flow channel section 5230, that is, Figure 2In the circumferential direction shown, the cross section of the third flow channel section 5230 is circular, and in the radial direction of the fourth flow channel section 5240, the cross section of the fourth flow channel section 5240 is circular, the central axis of the third flow channel section 5230 is perpendicular to the central axis of the fourth flow channel section 5240, the inner wall and outer wall of the second transition section 5250 are arc-shaped, the inner wall of the second transition section 5250 is tangent to the inner wall of the end of the second flow channel section 5230 connected to the second transition section 5250, and the inner wall of the second transition section 5250 is tangent to the inner wall of the end of the fourth flow channel section 5240 connected to the second transition section 5250, and the second transition section 5250 connects the third flow channel section 5230 and the fourth flow channel section 5240. The opening of the end of the third flow channel section 5230 away from the second transition section 5250 serves as the aforementioned second outflow port 502.

[0036] The third flow channel section 5230 includes a second large diameter section 5231 and a second small diameter section 5232, the second large diameter section 5231 is connected to the second transition section 5250, and the opening of the second small diameter section 5232 away from the second large diameter section 5231 serves as the second outflow port 502. The flow area of ​​the second large diameter section 5231 is greater than the flow area of ​​the second small diameter section 5232, the cross-sectional profile of the inner wall of the second large diameter section 5231 is circular, the cross-sectional profile of the inner wall of the second small diameter section 5232 is circular, the inner diameter of the second large diameter section 5231 is defined as A1, and the inner diameter of the second small diameter section 5232 is defined as C1, then A1>C1.

[0037] In this embodiment, a second positioning portion M is further provided between the second large diameter section 5231 and the second small diameter section 5232 by dotting, that is, by dotting from the outside to the inside, one or more convex points are formed which are convex inwardly relative to the inner wall of the second small diameter section 5232 as the second positioning portion M. Of course, the structure or shape of the second positioning portion M is not limited thereto. When an external pipe needs to be connected to the second small diameter section 5232, the second positioning portion M can limit the depth of the external pipe inserted into the second small diameter section 5232 and try not to affect the flow area of ​​the second small diameter section 5232.

[0038] The fourth flow channel section 5240 includes a second expansion section 5241 and a second throttling section 5242 . The second throttling section 5242 is connected to the second transition section 5230 . The second throttling section 5242 is located between the second transition section 5250 and the second expansion section 5241 .

[0039] The flow area of ​​the second expansion section 5241 is larger than the flow area of ​​the second small diameter section 5232. The flow area of ​​the second expansion section 5241 is larger than the flow area of ​​the second throttling section 5242, the flow area of ​​the second large diameter section 5231 is larger than or equal to the flow area of ​​the second throttling section 5242, the flow area of ​​the second large diameter section 5231 is larger than the flow area of ​​the second small diameter section 5232, and the flow area of ​​the second throttling section 5242 is larger than the flow area of ​​the second small diameter section 5232. With such arrangement, when the fluid flowing in from the inlet 43 of the valve core 40 flows out from the second outlet port 502, the fluid flows through the second expansion section 5241, then flows through the second throttling section 5242, and then passes through the second large diameter section 5231 and the second small diameter section 5232. In this process, by optimizing the flow area of ​​the internal flow channel of the second outflow channel 520, the turbulence and negative pressure of the fluid can be reduced, and the pressure loss of the fluid can be reduced, that is, the flow capacity of the control valve can be improved without changing the valve core size of the control valve.

[0040] Further, such as Figure 2-5 As shown, in this embodiment, the inner wall of the first expansion section 5121 is set to be of equal diameter. Of course, the first expansion section 5121 can also be a conical surface with an inner diameter gradually decreasing from one end close to the valve core 40 to the end away from the valve core 40, and the inner wall of the second expansion section 5241 is set to be of equal diameter. Of course, the second expansion section 5241 can also be a conical surface with an inner diameter gradually decreasing from one end close to the valve core 40 to the end away from the valve core 40. Define the inner diameter of the first throttling section 5122 as B (the inner diameter of the first throttling section 5122 also refers to the inner diameter of the position where the flow area of ​​the second flow channel section 5120 is the smallest), then the dimension A≥B>C is satisfied, and the ratio of A to B is defined as X, the ratio of A to C is defined as Y, and the ratio of B to C is defined as Z, that is, X=A / B, Y=A / C, Z=B / C, then 1.0≤X≤1.3, 1.1≤Y≤1.5, 1.1≤Z≤1.5. Define the inner diameter of the second throttling section 5242 as B1 (the inner diameter of the second throttling section 5242 also refers to the inner diameter of the position where the flow area of ​​the fourth flow channel section 5240 is the smallest), then the dimension A1≥B1>C1 is satisfied, and the ratio of A1 to B1 is defined as X1, the ratio of A1 to C1 is defined as Y1, and the ratio of B1 to C1 is defined as Z1, that is, X1=A1 / B1, Y1=A1 / C1, Z1=B1 / C1, then 1.0≤X1≤1.3, 1.1≤Y1≤1.5, 1.1≤Z1≤1.5. Such a setting can not only reduce the pressure loss of the fluid of the control valve in the first working state and the second working state, but also make the flow curve of the sum of the outflow from the first outflow port 501 and the second outflow port 502 of the control valve as stable as possible when the control valve is in the third working state, avoiding the problem of large fluctuation of the outflow flow due to pressure loss.

[0041] In this embodiment, if Figure 2-Figure 5 As shown, the valve body component 50 includes a valve body 51, a first valve seat 52, a first connecting pipe 53 fixedly connected to the first valve seat 52, a second valve seat 54, and a second connecting pipe 55 fixedly connected to the second valve seat 54. In this embodiment, the valve core 40 is a spherical valve core, the first sealing component 61 is located between the first valve seat 52 and the valve core 40, the second sealing component 62 is located between the second valve seat 54 and the valve core 40, the valve body 51, the first valve seat 52 and the second valve seat 54 are made of stainless steel, the valve body 51 is made of a pipe, the first valve seat 52 and the second valve seat 54 are machined, the valve body 51 is welded and fixed to the first valve seat 52, and the first valve seat 52 is welded and fixed to the first connecting pipe 53. The valve body 51 is welded and fixed to the second valve seat 54, the second valve seat 54 is welded and fixed to the second connecting pipe 55, and the first connecting pipe 53 and the second connecting pipe 55 are made of stainless steel or copper.

[0042] The first connecting pipe 53 is a 90-degree elbow pipe, including the aforementioned first flow channel section 5110 and the first transition section 5120. The portion of the first connecting pipe 53 perpendicular to the first flow channel section 5110 serves as a part of the second flow channel section 5120, and the first expansion section 5121 is located at the first valve seat 52.

[0043] The second connecting pipe 55 is a 90-degree elbow pipe, including the aforementioned third flow channel section 5230 and the second transition section 5250. The inner wall of the second transition section 5250 is an arc-shaped transition. The portion of the second connecting pipe 55 that is perpendicular to the third flow channel section 5230 serves as a part of the fourth flow channel section 5240.

[0044] like Figure 2-4 As shown, in this embodiment, the first connecting pipe 53 and the second connecting pipe 55 have the same structure (only the length of the second large diameter section 5231 and the first large diameter section 5111 are different), the first valve seat 52 and the second valve seat 54 have the same structure, and are both machined, A = A1, B = B1 C = C1, so as to reduce the specifications of the control valve parts, reduce the manufacturing cost of the valve and facilitate production management. Of course, under different usage requirements, the sizes of the first connecting pipe 53 and the second connecting pipe 55 and the first valve seat 52 and the second valve seat 54 can also be different.

[0045] like Figure 2-5 As shown, in order to improve the flow resistance of the fluid flowing from the first expansion section 5121 to the first throttling section 5122 and from the second expansion section 5241 to the second throttling section 5242, a first guide section 5123 is included between the first expansion section 5121 and the first throttling section 5122, and the first guide section 5123 is a conical surface with an inner diameter gradually decreasing from the first expansion section 5121 to the first throttling section 5122, and a second guide section 5243 is included between the second expansion section 5241 and the second throttling section 5242, and the second guide section 5243 is a conical surface with an inner diameter gradually decreasing from the second expansion section 5241 to the second throttling section 5242.

[0046] Figure 7 FIG. 1 is a schematic diagram of the structure of the third embodiment of the control valve of the present invention. Figure 8 Shown Figure 7 The embodiment can also achieve the beneficial effects of the flow channel optimization described in the above embodiments. The main difference between the embodiment and the control valve shown in the first embodiment is the difference in the structure of the valve body components, such as Figure 7 and Figure 8 As shown, in this embodiment, the valve body component 50A includes a valve body 51, a first valve seat 52A, a second valve seat 54A, a first sleeve assembly and a second sleeve assembly, the valve core 40 is a spherical valve core, the first sealing assembly 61 is located between the first valve seat 52A and the valve core 40, the second sealing component 62 is located between the second valve seat 54A and the valve core 40, the first sleeve assembly includes a first connecting pipe 53A and a first sleeve 56A, the second sleeve assembly includes a second connecting pipe 55A and a second sleeve 57A, the valve body 51 is made of stainless steel pipe, the first valve seat 52A and the second valve seat 54A are cast from steel, the first valve seat 52A is welded to the first connecting pipe 53A, and the second valve seat 54A is welded to the second connecting pipe 55A. Different from the first embodiment, in this solution, the first expansion section 5121A, the first throttling section 5122A and the first large diameter section 5111A are all formed on the first valve seat 52A, the second expansion section 5241A, the second throttling section 5242A and the second large diameter section 5231A are all formed on the second valve seat 54A, the first small diameter section 5112A is formed on the first connecting pipe 53A, and the second small diameter section 5232A is formed on the second connecting pipe 55A. Similarly, in this embodiment, the aforementioned dimensional relationships are also satisfied.

[0047] Figure 7 In the illustrated embodiment, the first small diameter section 5112A is the inner diameter of the portion of the first sleeve assembly with the smallest flow area, and the second small diameter section 5232A is the inner diameter of the portion of the second sleeve assembly with the smallest flow area. Figure 7 As shown, on the first sleeve assembly, a first limit portion W1 is formed by shrinking at the lower end of the first sleeve 56A, and a second limit portion M1 is formed by shrinking at the lower end of the second sleeve 57A. The functions of each limit portion are the same as those of the limit portion in the control valve shown in the first embodiment, and will not be described again. In this embodiment, the same reference numerals are used for the same parts as those shown in the first embodiment, and they are not shown one by one in this embodiment.

[0048] Figure 7 In the illustrated embodiment, the valve body 51A is made of steel, the first connecting pipe 53A and the second connecting pipe 55A are made of stainless steel, and the first sleeve 56A and the second sleeve 57A are made of copper. The advantage is that it facilitates the welding connection of copper pipes in the control valve system pipeline.

[0049] It should be noted that in the above embodiments, the orientation of the fluid inlet port, the first outflow port, and the second outflow port is such that one side is the inlet and the other side has two parallel outlets. Figure 2 and Figure 7 The position shown is that the fluid enters from the bottom and flows out from the top. It can be understood that in the control valves of the above embodiments, the fluid can also enter from the bottom and flow out from the direction perpendicular to the paper surface. That is, the above first outflow port and the second outflow port can have multiple outlet directions, so that the control valve can meet the requirements of multiple installation angles or installation spaces.

[0050] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A control valve, comprising a valve body component and a valve core, the valve body component comprising a valve cavity, the valve core being arranged in the valve cavity, the valve core comprising an inlet and a first outlet, the valve body component comprising a fluid inlet port, an inlet flow channel, a first outflow port and a first outflow channel, the first outflow channel comprising a first flow channel section, a second flow channel section and a first transition section, the first flow channel section being arranged vertically with the second flow channel section, the first flow channel section comprising a first large diameter section and a first small diameter section, the first large diameter section being connected to the first transition section, an opening of the first small diameter section away from the first transition section being the first outflow port, the second flow channel section comprising a first expansion section and a first throttling section, the first throttling section being located between the first transition section and the first expansion section, The flow area of ​​the first expansion section is greater than the flow area of ​​the first outlet, the flow area of ​​the first expansion section is greater than the flow area of ​​the first throttling section, the flow area of ​​the first large diameter section is greater than or equal to the flow area of ​​the first throttling section, the flow area of ​​the first large diameter section is greater than the flow area of ​​the first small diameter section, and the flow area of ​​the first throttling section is greater than the flow area of ​​the first small diameter section.

2. The control valve according to claim 1, characterized in that: The cross-sectional profile of the inner wall of the first flow channel section is circular, the cross-sectional profile of the inner wall of the second flow channel section is circular, the central axis of the first flow channel section is perpendicular to the central axis of the second flow channel section, the cross-sectional profile of the inner wall of the first large diameter section is circular, the cross-sectional profile of the inner wall of the first small diameter section is circular, the inner diameter of the first large diameter section is defined as A, the inner diameter of the first small diameter section is defined as C, the inner diameter of the first throttling section is defined as B, the ratio of A to B is defined as X, the ratio of A to C is defined as Y, and the ratio of B to C is defined as Z, then X=A / B, Y=A / C, Z=B / C, satisfying: A≥B>C, and, 1.0≤X≤1.3, 1.1≤Y≤1.5, 1.1≤Z≤1.

5.

3. The control valve according to claim 1 or 2, characterized in that: The valve core also includes a second outlet, the valve body component also includes a second outflow port and a second outflow channel, the second outflow channel includes a third flow channel section, a fourth flow channel section and a second transition section, the cross-sectional profile of the inner wall of the third flow channel section is circular, the cross-sectional profile of the inner wall of the fourth flow channel section is circular, the central axis of the third flow channel section is perpendicular to the central axis of the fourth flow channel section, the third flow channel section includes a second large diameter section and a second small diameter section, the second large diameter section is connected to the second transition section, and the opening of the second small diameter section away from the second transition section serves as the second outflow port, the fourth flow channel section includes a second expansion section and a second throttling section, the second throttling section is located between the second transition section and the second expansion section, The flow area of ​​the second expansion section is greater than the flow area of ​​the second outlet, the flow area of ​​the second expansion section is greater than the flow area of ​​the second outlet, the flow area of ​​the second expansion section is greater than the flow area of ​​the second throttling section, the flow area of ​​the second large diameter section is greater than or equal to the flow area of ​​the second throttling section, the flow area of ​​the second large diameter section is greater than the flow area of ​​the second small diameter section, and the flow area of ​​the second throttling section is greater than the flow area of ​​the second small diameter section.

4. The control valve according to claim 3, characterized in that: The cross-sectional profile of the inner wall of the second large diameter section is circular, and the cross-sectional profile of the inner wall of the second small diameter section is circular. The inner diameter of the second large diameter section is defined as A1, the inner diameter of the second small diameter section is defined as C1, the inner diameter of the second throttling section is defined as B1, the ratio of A1 to B1 is defined as X, the ratio of A1 to C1 is defined as Y1, and the ratio of B1 to C1 is defined as Z1. Then X1=A1 / B1, Y1=A1 / C1, Z1=B1 / C1, satisfying: A1≥B1>C1, and 1.0≤X1≤1.3, 1.1≤Y1≤1.5, 1.1≤Z1≤1.

5.

5. The control valve according to claim 4, characterized in that: A first guide section is included between the first expansion section and the first throttling section, and an inner diameter of the first guide section gradually decreases from one end of the first expansion section to one end of the first throttling section. A second guide section is included between the second expansion section and the second throttling section, and an inner diameter of the second guide section gradually decreases from one end of the second expansion section to one end of the second throttling section.

6. The control valve according to claim 5, characterized in that The valve body component includes a valve body, a first valve seat, a second valve seat, a first connecting pipe and a second connecting pipe. The valve body, the first valve seat and the second valve seat are made of stainless steel material. The first connecting pipe includes the first flow channel section and the first transition section. The inner wall of the first transition section is arc-shaped. The inner wall of the first transition section is tangent to the inner wall of the end of the first flow channel section connected to the first transition section. The inner wall of the first transition section is tangent to the inner wall of the end of the second flow channel section connected to the first transition section. The part of the first connecting pipe that is perpendicular to the first flow channel section serves as a part of the second flow channel section. The first flow expansion section is formed on the first valve seat. The second connecting pipe includes the third flow channel section and the second transition section. The part of the second connecting pipe that is perpendicular to the third flow channel section serves as a part of the fourth flow channel section. The second flow expansion section is formed on the second valve seat.

7. The control valve according to claim 5, characterized in that: The valve body component includes a valve body, a first valve seat, a second valve seat, a first connecting pipe and a second connecting pipe, the valve core is a spherical valve core, the valve body, the first valve seat and the second valve seat are made of stainless steel material, the valve body is made of a pipe, the first valve seat and the second valve seat are made by machining, the control valve also includes a first sealing component and a second sealing component, the first sealing component is located between the first valve seat and the valve core, the second sealing component is located between the second valve seat and the valve core, the first connecting pipe includes the first flow channel section and the first transition section, the inner wall of the first transition section is a round The first connecting pipe is arc-shaped, the inner wall of the first transition section is tangent to the inner wall of the end of the first flow channel section connected to the first transition section, the inner wall of the first transition section is tangent to the inner wall of the end of the second flow channel section connected to the first transition section, the portion of the first connecting pipe that is perpendicular to the first flow channel section serves as a part of the second flow channel section, the first flow expansion section is formed on the first valve seat, the second connecting pipe includes the third flow channel section and the second transition section, the portion of the second connecting pipe that is perpendicular to the third flow channel section serves as a part of the fourth flow channel section, and the second flow expansion section is formed on the second valve seat.

8. The control valve according to claim 5, characterized in that: The valve body component includes a valve body, a first sleeve assembly and a second sleeve assembly, a first valve seat, and a second valve seat. The valve core is a spherical valve core. The control valve also includes a first sealing assembly and a second sealing assembly. The first sealing assembly is located between the first valve seat and the valve core, and the second sealing member is located between the second valve seat and the valve core. The first sleeve assembly includes a first connecting pipe and a first sleeve, and the second sleeve assembly includes a second connecting pipe and a second sleeve. The valve body, the first valve seat, and the second valve seat are made of stainless steel, and the first connecting pipe and the second connecting pipe are made of copper. The first expansion section, the first throttling section and the first large diameter section are all formed on the first valve seat, the first small diameter section is formed on the first connecting pipe, the second expansion section, the second throttling section and the second large diameter section are all formed on the second valve seat, and the second small diameter section is formed on the second connecting pipe.

9. The control valve according to claim 5, characterized in that: The valve body component includes a valve body, a first sleeve assembly and a second sleeve assembly, a first valve seat, and a second valve seat. The valve core is a spherical valve core. The control valve also includes a first sealing assembly and a second sealing assembly. The first sealing assembly is located between the first valve seat and the valve core, and the second sealing member is located between the second valve seat and the valve core. The first sleeve assembly includes a first connecting pipe and a first sleeve, and the second sleeve assembly includes a second connecting pipe and a second sleeve. The valve body is made of steel, and the first valve seat and the second valve seat, the first connecting pipe, and the second connecting pipe are made of stainless steel. The valve body is made of a pipe, and the first valve seat and the second valve seat are formed by casting. The first sleeve and the second sleeve are made of copper. The first expansion section, the first throttling section and the first large diameter section are all formed on the first valve seat, the first small diameter section is formed on the first connecting pipe, the second expansion section, the second throttling section and the second large diameter section are all formed on the second valve seat, and the second small diameter section is formed on the second connecting pipe.

Images