Control valve and manufacturing method thereof

Abstract

The invention discloses a control valve and a manufacturing method of the control valve. The control valve comprises a valve pipe component, and the valve pipe component comprises a valve pipe and a connector; a mounting hole is formed in the pipe wall of the valve pipe; the joint is made of a plate; the connector comprises a cylinder part and a connecting part, and the connecting part extends outwards in the radial direction from the bottom end of the cylinder part. The mounting hole is wrapped by the connecting part, the connecting part is fixedly connected with the pipe wall of the valve pipe, and the mounting hole is communicated with the cylinder cavity of the cylinder part. According to the control valve, the manufacturing cost can be reduced and the machining efficiency can be improved through structural optimization.

Description

Technical Field

[0001] The present application relates to the technical field of fluid control, and particularly to a control valve and a manufacturing method thereof. Background Art

[0002] In the related art, a ball valve includes a valve pipe, a valve seat, a valve core ball and a valve stem. The valve seat is fixedly connected to the valve pipe, a valve cavity is formed between the valve seat and the valve pipe, the valve core ball is located in the valve cavity, and the flow path between two interfaces of the valve seat is conducted or cut off by driving the valve core ball to rotate by rotating the valve stem.

[0003] Among them, the valve pipe has a flanged interface, a joint is fixed through the flange, the valve stem is installed and matched with the joint, one end of the valve stem passes through the joint and extends into the valve cavity to be connected with the valve core ball, and the other end extends outside the joint. A limiting boss for preventing the valve stem from flying out is arranged inside the joint, and an installation groove for placing a retaining ring is also arranged at the upper end of the joint. The retaining ring is fixed in the installation groove by welding for limiting the rotation angle of the valve stem; in addition, a valve cap is also screwed outside the joint, and an O-ring for sealing is arranged between the valve cap and the joint.

[0004] In the above ball valve structure, the valve pipe has a flange, which is difficult to process and has low processing efficiency. Summary of the Invention

[0005] The purpose of the present application is to provide a control valve and a processing method thereof. The control valve can reduce the manufacturing cost and improve the processing efficiency through structural optimization.

[0006] To solve the above technical problems, the present application provides a control valve, including a valve pipe component, and the valve pipe component includes a valve pipe and a joint;

[0007] The pipe wall of the valve pipe has an installation hole;

[0008] The joint is made of sheet metal; the joint includes a cylindrical part and a connecting part, and the connecting part extends radially outward from the bottom end of the cylindrical part;

[0009] The connecting part surrounds the installation hole, the connecting part is fixedly connected to the pipe wall of the valve pipe, and the installation hole communicates with the cylindrical cavity of the cylindrical part.

[0010] In an implementable solution, the control valve includes a valve stem part, at least part of the valve stem part is located in the cylindrical cavity of the cylindrical part, and the valve stem part can rotate relative to the cylindrical part; the joint further includes a flanging part, the flanging part extends radially inward from the top end of the cylindrical part, and the valve stem part can abut against the flanging part to prevent the valve stem part from disengaging from the joint.

[0011] In an implementable solution, the joint includes a positioning portion, and the positioning portion includes two convex portions that protrude radially inward from the inner peripheral wall of the flanging portion. The convex portions are used to limit the rotation angle of the valve stem portion relative to the joint.

[0012] Alternatively, the joint includes a positioning portion. The inner peripheral wall of the flanging portion defines an elongated hole. The inner peripheral wall includes a first flat portion and a second flat portion that are arranged circumferentially and oppositely. The positioning portion includes the first flat portion and the second flat portion, and the first flat portion and the second flat portion are used to limit the rotation angle of the valve stem portion relative to the joint.

[0013] In an implementable solution, the control valve includes a valve cap. The cylindrical portion has an external thread portion, and the valve cap has an internal thread portion. The internal thread portion is in threaded engagement with the external thread portion. A sealing ring is provided between the valve cap and the flanging portion, and the top surface of the flanging portion is used to support the sealing ring.

[0014] In an implementable solution, the connecting portion has a connecting surface that fits and is fixed to the tube wall of the valve tube. The connecting surface is in the shape of a saddle surface. The valve tube and the joint are made of stainless steel.

[0015] The present application also provides a manufacturing method for a control valve, including:

[0016] Providing a valve tube: An installation hole is provided on the tube wall of the valve tube.

[0017] Providing a joint: Using sheet metal stamping and / or stretching to form. The joint includes a cylindrical portion and a connecting portion. The connecting portion extends radially outward from one end of the cylindrical portion.

[0018] Assembling the valve tube and the joint: Position the connecting portion outside the periphery of the installation card, and weld and fix the connecting portion to the tube wall of the valve tube.

[0019] In an implementable solution, the step of providing the joint further includes:

[0020] A flanging portion is formed by stamping at the other end of the cylindrical portion away from the connecting portion. The flanging portion extends radially inward from the other end of the cylindrical portion.

[0021] In an implementable solution, the step of providing the joint further includes:

[0022] A positioning portion is formed by stamping on the inner peripheral wall of the flanging portion. The positioning portion includes two convex portions that protrude radially inward from the inner peripheral wall of the flanging portion.

[0023] Or,

[0024] The step of providing the joint further includes:

[0025] At the other end of the cylindrical part away from the connecting part, a flanging part is formed by stamping, and the inner peripheral wall of the flanging part encloses a long hole. The inner peripheral wall includes a first flat part and a second flat part that are arranged circumferentially and oppositely.

[0026] In an implementable solution, the provided joint further includes: machining an external thread part on the outer peripheral wall of the cylindrical part.

[0027] In an implementable solution, in the provided joint, the surface of the connecting part that contacts the pipe wall of the valve pipe is stamped into a saddle shape so that the connecting part fits with the pipe wall of the valve pipe.

[0028] In an implementable solution, the valve pipe and the joint are made of stainless steel material. The valve pipe and the joint are pre-positioned by spot welding and then fixed by furnace welding.

[0029] Compared with the control valve in the background art, in the control valve and the manufacturing method of the control valve provided by this solution, the flanging structure of the valve pipe is cancelled. Only an installation hole for cooperating with the joint needs to be machined on the pipe wall of the valve pipe. The joint is made of sheet metal, and the joint is provided with a connecting part fixedly connected to the pipe wall of the valve pipe. In this way, the processing difficulty of the valve pipe is reduced, the material consumption of the joint is saved, and the manufacturing cost is effectively reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic structural diagram of a control valve provided by an embodiment of the present application;

[0031] Figure 2 It is Figure 1 A partial sectional view of the control valve shown;

[0032] Figure 3 It is Figure 1 A schematic structural diagram of the valve pipe component of the control valve in;

[0033] Figure 4 It is Figure 3 A side view of the valve pipe component shown;

[0034] Figure 5 It is Figure 3 A sectional view of the valve pipe component shown;

[0035] Figure 6 It is Figure 3 A schematic structural diagram of the valve pipe of the valve pipe component in;

[0036] Figure 7 It is Figure 3 A schematic structural diagram of the joint of the valve pipe component in;

[0037] Figure 8 It is Figure 7Cross-sectional view of the shown joint from one perspective;

[0038] Figure 9 is Figure 7 Cross-sectional view of the shown joint from another perspective;

[0039] Figure 10 is Figure 1 Schematic structural diagram of the valve seat component of the control valve in

[0040] Figure 11 is Figure 10 Cross-sectional view of the shown valve seat component;

[0041] Figure 12 Schematic assembly diagram of the valve tube component and the valve seat component in a specific embodiment;

[0042] Figure 13 Schematic structural diagram of the joint of the control valve provided by another embodiment of the present application;

[0043] Figure 14 is for Figure 13 Schematic structural diagram of the valve stem part adapted to the shown joint;

[0044] Figure 15 Schematic diagram of the positional relationship between the valve stem part and the cylindrical part of the joint when the control valve provided by another embodiment of the present application is in the valve-closed state;

[0045] Figure 16 Schematic diagram of the positional relationship between the valve stem part and the cylindrical part of the joint when the control valve provided by another embodiment of the present application is in the valve-open state.

[0046] Explanation of reference numerals:

[0047] Valve tube component 10, valve tube 11, mounting hole 112, joint 12, cylindrical part 121, connecting part 122, connecting surface 1221, flanging part 123, first flat part 1231, second flat part 1232, first transition surface part 1233, second transition surface part 1234, convex part 124, external thread part 125,

[0048] Valve stem part 20, step surface 201, end part 202, first wall 221, second wall 222, transition wall 223, first sealing ring 21;

[0049] Valve cap 30, internal thread part 31, knurling 32, step part 33, second sealing ring 34;

[0050] Valve core ball 40, sealing gasket 41;

[0051] Valve seat component 50, valve seat 51, connecting pipe 52, pipe joint 53. Detailed implementation manners

[0052] To enable those skilled in the art to better understand the solution of this application, the following further detailed description of this application will be provided in conjunction with the accompanying drawings and specific embodiments.

[0053] The orientation terms such as up (top) and down (bottom) involved in this article are defined based on the positions of the components in the drawings and the mutual positional relationships between the components. The use of these orientation terms is only for the convenience of understanding and describing the technical solution, and does not constitute a limitation on the protection scope.

[0054] Please refer to Figure 1 and Figure 2 , Figure 1 which is a schematic structural diagram of the control valve provided by the embodiment of this application; Figure 2 is Figure 1 a partial sectional view of the control valve shown.

[0055] The control valve provided by the embodiment of this application can be applied to the air-conditioning multi-connected indoor unit system. For example, the control valve is arranged between the indoor unit and the outdoor unit, and the refrigerant circuit can be cut off through the control valve to prevent refrigerant leakage when one end is being repaired.

[0056] The control valve includes a valve tube component 10, a valve stem part 20, a valve core ball 40, and a valve seat component 50. Among them, there are two valve seat components 50, which are symmetrically arranged relative to the valve tube component 10. Each of the two valve seat components 50 has two flow channels. The valve tube component 10 and the two valve seat components 50 are fixedly formed into a valve cavity. The valve core ball 40 is located in this valve cavity, and the valve stem part 20 can drive the valve core ball 40 to rotate to conduct or cut off the passage between the two flow channels.

[0057] The valve tube component 10 includes a valve tube 11 and a joint 12, and the joint 12 is fixed on the valve tube 11.

[0058] The valve seat component 50 includes a valve seat 51, a connecting pipe 52, and a pipe joint 53. One end of the valve seat 51 is fixedly connected to the open end of the valve tube 11, and the other end is fixedly connected to the connecting pipe 52. The end of the connecting pipe 52 away from the valve seat 51 is fixedly connected to the pipe joint 53. The valve seat 51 and the connecting pipe 52 are generally made of steel, such as stainless steel, and the pipe joint 53 can be made of copper to facilitate welding and fixing with the system pipeline. It can be understood that according to application needs, the pipe joint 53 may not be provided, and the connecting pipe 52 is directly welded to the system pipeline. The aforementioned flow channel includes the lumen of the connecting pipe 52.

[0059] The two valve seats 51 and the valve tube 11 form a valve cavity, and the valve core ball 40 is arranged in the valve cavity. To ensure sealing performance, both of the two valve seats 51 have a stepped portion with a stepped surface facing the valve core ball 40, and sealing gaskets 41 are arranged on both of the two stepped portions. The valve core ball 40 is in contact with the sealing gaskets 41 for sealing.

[0060] Please refer to Figures 3 to 11 ,Figure 3 is Figure 1 a schematic structural view of the valve tube component of the control valve in Figure 4 is Figure 3 a side view of the valve tube component shown in Figure 5 is Figure 3 a sectional view of the valve tube component shown in Figure 6 is Figure 3 a schematic structural view of the valve tube of the valve tube component in Figure 7 is Figure 3 a schematic structural view of the joint of the valve tube component in Figure 8 is Figure 7 a sectional view of the joint shown in one perspective Figure 9 is Figure 7 a sectional view of the joint shown in another perspective Figure 10 is Figure 1 a schematic structural view of the valve seat component of the control valve in Figure 11 is Figure 10 a sectional view of the valve seat component shown in

[0061] In this embodiment, the valve tube component 10 includes a valve tube 11 and a joint 12. The valve tube 11 can be a pipe fitting with openings at both ends. The two open ends of the valve tube 11 are respectively fixedly connected to two valve seat components 50. The tube wall of the valve tube 11 has an installation hole 112, which is used for fitting and installing with the joint 12. The joint 12 is used for installing and cooperating with the valve stem part 20 so that the valve stem part 20 can extend into the valve tube 11 to cooperate with the valve core ball 40.

[0062] The joint 12 is made of sheet metal; in a specific implementation, the joint 12 can be an integrally formed part, and the forming method can be stamping and / or stretching; the joint 12 includes a cylindrical part 121 and a connecting part 122, and the connecting part 122 extends radially outward from the bottom end of the cylindrical part 121. The joint 12 is fixedly connected to the tube wall of the valve tube 11 through the connecting part 122. The connecting part 122 of the joint 12 surrounds the installation hole 112, that is to say, the connecting part 122 is located around the installation hole 112, and the installation hole 112 of the valve tube 11 communicates with the cylindrical cavity of the cylindrical part 121 of the joint 12. In other words, the fixed position of the joint 12 on the valve tube 11 is the position where the installation hole 112 is located, and the size of the cylindrical cavity of the cylindrical part 121 of the joint 12 can be adapted to the installation hole 112.

[0063] In a specific implementation, a seal is provided between the connecting part 122 and the tube wall of the valve tube 11 to prevent refrigerant leakage.

[0064] Compared with the valve tube with flanges in the background art, in this embodiment, the valve tube 11 does not need to be provided with a flanging structure connected to the joint 12 at the position where the mounting hole 112 is located. Only the mounting hole 112 needs to be machined on the tube wall of the valve tube 11, which reduces the processing difficulty, correspondingly reduces the processing cost, and can improve the processing efficiency. Compared with the joint machined from a solid bar stock in the background art, in this embodiment, the joint 12 is formed by sheet metal stamping and / or stretching. On the one hand, it can save materials, and on the other hand, it can reduce the tool sharing cost, which is beneficial to cost reduction. The stamping and / or stretching processing method is also beneficial to improve efficiency.

[0065] In a specific implementation, the connecting portion 122 has a connecting surface 1221 that fits and fixes with the tube wall of the valve tube 11, and the connecting surface 1221 is in the shape of a saddle surface. In other words, the connecting surface 1221 of the connecting portion 122 is conformally arranged with the tube wall surface around the mounting hole 112 of the valve tube 11. In this way, the fitting degree between the connecting portion 122 and the valve tube 11 during installation can be ensured, which is beneficial to improving the sealing effect between the two.

[0066] In application, the connecting surface 1221 of the connecting portion 122 and the tube wall surface of the valve tube 11 are fixed by welding, which can ensure airtightness and avoid additionally setting a sealing structure between the connecting portion 122 and the valve tube 11.

[0067] As Figure 2 shown, the valve stem portion 20 is installed in the cylindrical portion 121 of the joint 12. The lower end of the valve stem portion 20 extends into the valve tube 11 through the mounting hole 112 of the valve tube 11 and cooperates with the valve core ball 40. It can be understood that at least part of the valve stem portion 20 is located in the cavity of the cylindrical portion 121 of the joint 12, and the valve stem portion 20 can rotate relative to the cylindrical portion 121 to drive the valve core ball 40 to rotate. The lower end of the valve stem portion 20 and the valve core ball 40 can be matched by a keyway method or other methods, as long as the valve stem portion 20 can drive the valve core ball 40 to rotate together.

[0068] To prevent the valve stem portion 20 from disengaging from the joint 12, a limiting structure is also provided between the valve stem portion 20 and the joint 12 to limit the relative position of the valve stem portion 20 and the joint 12 in the up and down directions.

[0069] In this embodiment, the joint 12 further includes a flanging portion 123, which extends radially inward from the top end of the cylindrical portion 121. The flanging portion 123 is used to prevent the valve stem portion 20 from disengaging from the joint 12. Correspondingly, the valve stem portion 20 has an upward step surface 201, and the step surface 201 can abut against the flanging portion 123 to limit the relative position of the valve stem portion 20 and the cylindrical portion 121 in the axial direction of the cylindrical portion 121, and avoid the valve stem portion 20 from disengaging from the joint 12 from the upper part.

[0070] In a specific implementation, the flanging portion 123 of the joint 12 can be formed during stamping or can be formed by bending subsequently, which is convenient for processing.

[0071] In this embodiment, the valve stem portion 20 drives the valve core ball 40 to rotate by 90 degrees to achieve the opening and closing operations of the valve. To limit the rotation of the valve stem portion 20 between the open valve position and the closed valve position, that is, to limit the rotation angle range of the valve stem portion 20, the control valve is also provided with a positioning portion.

[0072] In a specific implementation, the joint 12 is provided with a positioning portion for limiting the opening and closing valve positions of the valve stem portion 20. The positioning portion includes two convex portions 124 protruding radially inward from the inner peripheral wall of the flanging portion 123. The top end of the valve stem portion 20 extends out of the cylindrical portion 121 of the joint 12. When the valve stem portion 20 rotates, it can abut against the convex portions 124 for limiting, so as to limit the rotation angle range of the valve stem portion 20. The two convex portions 124 can be specifically arranged symmetrically with respect to the center of the flanging portion 123.

[0073] In a specific implementation, to ensure the sealing performance, a first sealing ring 21 is provided between the valve stem portion 20 and the cylindrical portion 121. Specifically, an annular installation groove is provided on the outer peripheral wall of the valve stem portion 20, and the first sealing ring 21 is placed in the installation groove, which is convenient for processing. In the illustrated example, two first sealing rings 21 are sleeved on the valve stem portion 20, which can improve the sealing effect between the valve stem portion 20 and the joint 12. In practical applications, the materials of the two first sealing rings 21 can be the same or different.

[0074] In this embodiment, the control valve further includes a valve cap 30, and the valve cap 30 is fixedly sleeved on the top end of the joint 12.

[0075] In a specific implementation, the valve cap 30 and the joint 12 can be connected and fixed through a thread pair. In this way, when it is necessary to operate the valve stem portion 20 to open or close the valve, the valve cap 30 can be removed. After the operation is completed, the valve cap 30 is screwed on again.

[0076] The cylindrical portion 121 of the joint 12 has an external thread portion 125, and the valve cap 30 has an internal thread portion 31, and the external thread portion 125 and the internal thread portion 31 are threadedly connected.

[0077] The external thread portion 125 of the cylindrical portion 121 can be formed by turning after the joint 12 is formed by stamping and / or stretching.

[0078] A stepped portion 33 with a stepped surface facing the joint 12 can be provided in the cap cavity of the valve cap 30. A second sealing ring 34 can be provided on the stepped portion 33 of the valve cap 30. After the valve cap 30 is threadedly fixed to the joint 12, the second sealing ring 34 can be squeezed between the joint 12 and the stepped portion 33 to form a second seal, which can improve the sealing effect of the control valve.

[0079] In a specific implementation, the top surface of the flanging portion 123 of the joint 12 serves as the supporting surface for the second sealing ring 34, eliminating the need for additional machining on the joint 12 to provide a supporting surface for the second sealing ring 34.

[0080] In other embodiments, the stepped portion 33 of the valve cap 30 can also be replaced with a mounting groove facing the joint 12, that is, the second sealing ring 34 is disposed in the mounting groove of the valve cap 30.

[0081] As Figure 1 shown, in a specific implementation, knurling 32 can be provided on the outer peripheral wall of the valve cap 30 to facilitate the rotation of the valve cap 30. The structural form of the knurling 32 is not limited.

[0082] The embodiment of the present application also provides a manufacturing method for a control valve, which can be the control valve described in the above embodiments.

[0083] Please refer to Figure 12 , Figure 12 which is an assembly schematic diagram of the valve tube component and the valve seat component in a specific embodiment.

[0084] In this embodiment, the manufacturing method of the control valve includes:

[0085] Providing a valve tube 11: The valve tube 11 can be a pipe fitting with both ends open, and mounting holes 112 are provided on the tube wall of the valve tube 11.

[0086] Specifically, a stainless steel pipe fitting can be used, and a pipe fitting of a certain length is cut out as the valve tube 11 according to needs, and mounting holes 112 of appropriate size are machined on the tube wall of the valve tube 11. The formed valve tube 11 is as Figure 6 shown.

[0087] Providing a joint 12: It is formed by sheet metal stamping and / or stretching. The sheet metal can be selected as steel, such as stainless steel sheet; the joint 12 includes a cylindrical portion 121 and a connecting portion 122, and the connecting portion 122 extends radially outward from one end (lower end) of the cylindrical portion 121.

[0088] Assembling the valve tube 11 and the joint 12: The connecting portion 122 is placed on the outer periphery of the mounting hole 112, and the connecting portion 122 of the joint 12 is welded and fixed to the tube wall of the valve tube 11. In other words, the cylindrical portion 121 of the joint 12 is aligned with the mounting hole 112 of the valve tube 11. After welding, the space between the connecting portion 122 and the tube wall of the valve tube 11 is sealed, and the cavity of the cylindrical portion 121 communicates with the lumen of the valve tube 11 through the mounting hole 112.

[0089] In a specific implementation, the connecting surface 1221 of the connecting portion 122 facing away from the cylindrical portion 121 has a saddle shape that can fit the tube wall of the valve tube 11. In this way, when the connecting surface 1221 of the connecting portion 122 is welded and fixed to the tube wall of the valve tube 11, it is easy to ensure the airtightness between the two, and the processing is convenient.

[0090] In a specific implementation, the aforementioned provided joint 12 further includes: a flanging portion 123 is formed by stamping at the other end of the cylindrical portion 121 away from the connecting portion 122, and the flanging portion 123 extends radially inward from the other end (upper end) of the cylindrical portion 121.

[0091] In a specific implementation, the aforementioned provided joint 12 further includes: a positioning portion is formed by stamping on the inner peripheral wall of the flanging portion 123, and the positioning portion includes two convex portions 124 that protrude radially inward from the inner peripheral wall of the flanging portion 123.

[0092] In a specific implementation, the aforementioned provided joint 12 further includes: an external thread portion 125 is machined on the outer peripheral wall of the cylindrical portion 121.

[0093] In a specific implementation, when assembling the valve pipe 11 and the joint 12, the connecting portion 122 and the valve pipe 11 are fixed by spot welding and furnace welding, that is, first spot welding is performed for pre-positioning, and then fixed by furnace welding. After welding the valve pipe 11 and the joint 12, a valve pipe component 10 is formed.

[0094] Combined with Figure 10 and Figure 11 , the manufacturing method of this control valve further includes: assembling the valve seat component 50.

[0095] Assembling the valve seat component 50 may include: preparing the valve seat 51, the connecting pipe 52, and the pipe joint 53; among them, the valve seat 51 and the connecting pipe 52 are made of steel materials, such as stainless steel, and the pipe joint 53 is made of copper materials, such as brass or red copper.

[0096] The valve seat 51, the connecting pipe 52, and the pipe joint 53 are welded and fixed to form the valve seat component 50.

[0097] As Figure 12 shown, after the valve pipe component 10 and the valve seat component 50 are each assembled, the valve seat 51 of one valve seat component 50 is welded and fixed to an open end of the valve pipe 11 of the valve pipe component 10, and specifically, it can be realized by laser welding.

[0098] After that, the valve stem portion 20 sleeved with the first sealing ring 21, the sealing gasket 41, and the valve core ball 40 can be inserted from the other open end of the valve pipe 11, and then the valve seat 51 of the other valve seat component 50 is welded and fixed to the other open end of the valve pipe 11 of the valve pipe component 10.

[0099] Subsequently, the valve cap 30 can be tightened on the joint 12.

[0100] Please refer to Figures 13 to 16 , Figure 13 which is a schematic structural diagram of the joint of the control valve provided in another embodiment of the present application; Figure 14 is a schematic structural diagram of the valve stem portion adapted to the joint shown in Figure 13 ;Figure 15 Schematic diagram of the positional relationship between the valve stem portion and the cylindrical portion of the joint when the control valve provided in another embodiment of the present application is in the closed valve state; Figure 16 Schematic diagram of the positional relationship between the valve stem portion and the cylindrical portion of the joint when the control valve provided in another embodiment of the present application is in the open valve state.

[0101] In this embodiment, the structural composition of the control valve is similar to that of the control valve shown in the foregoing Figures 1 to 5 The joint 12 of the control valve in this embodiment is slightly different from the joints shown in Figure 7 and Figure 8 The main components of the joint 12 in the two embodiments are similar. The difference lies in the structure of the positioning portion of the joint 12 for restricting the rotation of the valve stem portion 20. The following will describe the differences in detail. The other structures of the joint 12 can still be understood with reference to the foregoing description.

[0102] In this embodiment, the joint 12 is also made of sheet metal; in a specific implementation, the joint 12 can be an integrally formed part, and the forming method can also be stamping and / or stretching. The inner peripheral wall of the flanging portion 123 of the joint 12 encloses an elongated hole, and the elongated hole includes a first flat portion 1231 and a second flat portion 1232 arranged circumferentially and oppositely. The positioning portion of the joint 12 includes a first flat portion 1321 and a second flat portion 1232. The first flat portion 1321 and the second flat portion 1321 are used to restrict the rotation angle of the valve stem portion 20 relative to the joint 12.

[0103] In a specific implementation, the inner peripheral wall of the flanging portion 123 further includes a first transition surface portion 1233 and a second transition surface portion 1234 arranged circumferentially and oppositely. Among them, the first transition surface portion 1233 connects one end of the first flat portion 1321 and the second flat portion 1321 in the circumferential direction, and the second transition surface portion 1234 connects the other end of the first flat portion 1321 and the second flat portion 1321 in the circumferential direction. The distance between the first transition surface portion 1233 and the second transition surface portion 1234 is greater than the distance between the first flat portion 1231 and the second flat portion 1232. It can be understood that the inner peripheral wall of the flanging portion 123 forms an elongated hole structure. Specifically, the inner peripheral wall of the flanging portion 123 forms a waist-shaped hole or an oblong hole, and the first transition surface portion 1233 and the second transition surface portion 1234 are specifically arc-shaped.

[0104] To adapt to the above-mentioned positioning portion structure of the joint 12, as Figure 14As shown, at least a part of the rod portion of the valve stem portion 20 is located within the cylindrical portion 121 of the joint 12 and within the elongated hole formed by the flanging portion 123, and can be adapted to the inner peripheral wall of the flanging portion 123. The cross-section of this part of the rod portion of the valve stem portion 20 is of an elongated structure, so as to be able to rotate within the elongated hole formed by the flanging portion 123 to switch between the valve-closed position and the valve-open position. In the valve-closed position, the valve stem portion 20 can abut against the first planar portion 1321 and the second planar portion 1322 simultaneously. After rotating in a predetermined direction to the valve-open position, the valve stem portion 20 can also abut against the first planar portion 1321 and the second planar portion 1322 simultaneously. This positioning method can enable the valve stem portion 20 and the positioning portion of the joint 12 to have a relatively large contact area, and can improve the reliability of positioning.

[0105] In a specific implementation, the part of the rod portion of the valve stem portion 20 that is adapted to the elongated hole of the flanging portion 123 has two end portions 202 in the long axis direction L (marked in Figure 14 ) of its cross-section. Both end portions 202 include a first wall 221, a second wall 222, and a transition wall 223 connecting the first wall 221 and the second wall 222. The distance between the first wall 221 and the second wall 222 gradually increases in the direction approaching the axis of the valve stem portion 20. It can be understood that the first wall 221, the second wall 222, and the transition wall 223 form a generally outwardly convex shape.

[0106] As Figure 15 shown, when the valve stem portion 20 is in the valve-closed position relative to the joint 12, the second walls 222 of the two end portions 202 of the valve stem portion 20 abut against the first planar portion 1231 and the second planar portion 1232 respectively for limiting. As Figure 16 shown, when the valve stem portion 20 is in the valve-open position relative to the joint 12, the first walls 221 of the two end portions 202 of the valve stem portion 20 abut against the first planar portion 1231 and the second planar portion 1232 respectively for limiting.

[0107] In a specific implementation, the two transition walls 223 of the valve stem portion 20 can both be set as arc-shaped walls, and are respectively in contact with the arc-shaped first transition face portion 1233 and the second transition face portion 1234. When the valve stem portion 20 rotates, the cooperation of the arc-shaped transition face portions of the transition walls 223 can guide the rotation of the valve stem portion 20.

[0108] In this embodiment, the above structure of the positioning portion of the joint 12 is convenient for processing.

[0109] It should be noted here that the manufacturing method of the control valve adopting the structure of the joint 12 in this embodiment is similar to the manufacturing method of the corresponding Figure 12 control valve mentioned above. The difference is that in the relevant steps of the joint 12, the flanging portion 123 of the joint 12 is processed into the Figure 13 structure shown. The manufacturing method will not be repeated here.

[0110] In this text, specific examples are used to illustrate the principles and implementation manners of the present application. The descriptions of the above embodiments are only used to help understand the method and its core idea of the present application. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principles of the present application, several improvements and modifications can still be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A control valve, characterized in that, It includes a valve pipe component, and the valve pipe component includes a valve pipe and a joint; The pipe wall of the valve pipe has mounting holes; The joint is made of sheet metal; the joint includes a cylindrical part and a connecting part, and the connecting part extends radially outward from the bottom end of the cylindrical part; The connecting part surrounds the mounting hole, the connecting part is fixedly connected to the pipe wall of the valve pipe, and the mounting hole communicates with the cavity of the cylindrical part.

2. The control valve according to claim 1, characterized in that, The control valve includes a valve rod part, at least part of the valve rod part is located in the cavity of the cylindrical part, and the valve rod part can rotate relative to the cylindrical part; the joint further includes a flanging part, the flanging part extends radially inward from the top end of the cylindrical part, and the valve rod part can abut against the flanging part to prevent the valve rod part from disengaging from the joint.

3. The control valve according to claim 2, characterized in that, The joint includes a positioning part, and the positioning part includes two convex parts protruding radially inward from the inner peripheral wall of the flanging part, and the convex parts are used to limit the rotation angle of the valve rod part relative to the joint; Alternatively, the joint includes a positioning part, the inner peripheral wall of the flanging part forms a long hole, the inner peripheral wall includes a first plane part and a second plane part arranged circumferentially and oppositely, and the positioning part includes the first plane part and the second plane part, and the first plane part and the second plane part are used to limit the rotation angle of the valve rod part relative to the joint.

4. The control valve according to claim 2, characterized in that, The control valve includes a valve cap, the cylindrical part has an external thread part, the valve cap has an internal thread part, and the internal thread part is in threaded cooperation with the external thread part; a sealing ring is provided between the valve cap and the flanging part, and the top surface of the flanging part is used to support the sealing ring.

5. The control valve according to any one of claims 1-4, characterized in that, The connecting part has a connecting surface that fits and is fixed to the pipe wall of the valve pipe, the connecting surface is in the shape of a saddle surface, and the materials of the valve pipe and the joint are stainless steel.

6. A manufacturing method of a control valve, characterized in that, It includes: Providing a valve pipe: Mounting holes are provided on the pipe wall of the valve pipe; Providing a joint: It is formed by stamping and / or stretching of sheet metal, the joint includes a cylindrical part and a connecting part, and the connecting part extends radially outward from one end of the cylindrical part; Assembling the valve pipe and the joint: Position the connecting part on the outer periphery of the mounting hole, and weld and fix the connecting part to the pipe wall of the valve pipe.

7. The manufacturing method of the control valve according to claim 6, characterized in that, The step of providing the joint further includes: A flanging part is formed by stamping at the other end of the cylindrical part away from the connecting part, and the flanging part extends radially inward from the other end of the cylindrical part.

8. The manufacturing method of the control valve according to claim 7, characterized in that, The step of providing the joint further includes: A positioning part is formed by stamping on the inner peripheral wall of the flanging part, and the positioning part includes two convex parts protruding radially inward from the inner peripheral wall of the flanging part; Or, The step of providing the joint further includes: The inner peripheral wall of the flanging part formed by stamping at the other end of the cylindrical part away from the connecting part forms a long hole, and the inner peripheral wall includes a first plane part and a second plane part arranged circumferentially and oppositely.

9. The manufacturing method of the control valve according to claim 7, characterized in that, The step of providing the joint further includes: Turning an external thread part on the outer peripheral wall of the cylindrical part.

10. The manufacturing method of the control valve according to any one of claims 6-9, characterized in that, In the step of providing the joint, the surface of the connecting part in contact with the pipe wall of the valve pipe is stamped into the shape of a saddle surface so that the connecting part fits the pipe wall of the valve pipe.

11. The manufacturing method of the control valve according to any one of claims 6-9, characterized in that, The valve tube and the joint are made of stainless steel material. The valve tube and the joint are pre-positioned by spot welding and then fixed by furnace welding.

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