Valve device and manufacturing method thereof

Abstract

The valve device comprises a coil assembly and a valve component, the coil assembly comprises a stator assembly and a shell part, the shell part comprises a supporting part, the supporting part is arranged at the lower end of the shell part, the shell part of the supporting part is provided with a limiting groove, and at least part of a sealing piece is located in the limiting groove. The supporting part comprises a main body part and a bent part, the bent part is bent to form a certain angle relative to the main body part, the main body part and the bent part form at least one part of the limiting groove, and the bent part is bent and formed relative to the main body part in an ultrasonic hot riveting mode. Through the arrangement, forming of the coil assembly is relatively simple, the structure of the valve device is also relatively simple, the mounting efficiency of the valve device is improved, and correspondingly, the embodiment of the invention provides a manufacturing method of the valve device, and the manufacturing process of the valve device is simplified.

Description

Technical Field

[0001] The present application relates to the field of fluid control technology, and in particular to a valve device and a manufacturing method thereof. Background Art

[0002] The valve device includes a coil assembly and a valve component. A sealing ring is arranged between the coil assembly and the valve component. The sealing ring can seal the gap between the coil assembly and the valve component. In the related art, the coil assembly, the valve component and the sealing ring need to be transported separately. Finally, during the assembly stage, the sealing ring is first sleeved on the valve component, and then the coil assembly is sleeved on the valve component. At this time, the sealing ring is pressed between the coil assembly and the valve component. With this arrangement, the coil assembly, the valve component and the sealing component are independent of each other before assembly, and an additional sealing component installation process needs to be added during installation, which is not conducive to improving installation efficiency. Summary of the invention

[0003] The purpose of the present application is to provide a valve device, which is conducive to improving the installation efficiency of the valve device, and a method for manufacturing the valve device, which is conducive to simplifying the manufacturing process of the valve device.

[0004] To achieve the above purpose, one embodiment of the present application adopts the following technical solution:

[0005] A valve device, the valve device includes a coil assembly and a valve component, the coil assembly is arranged on the valve component, the valve device also includes a sealing member, at least a portion of the sealing member is pressed by the coil assembly and the valve component, the coil assembly includes an outer shell portion, the outer shell portion includes a supporting portion, the supporting portion is arranged at the lower end of the outer shell portion, the outer shell portion 11 has a limiting groove, at least a portion of the sealing member is located in the limiting groove, the supporting portion includes a main body portion and a bending portion, the bending portion is at a certain angle relative to the main body portion, the main body portion and the bending portion constitute at least a portion of the limiting groove, and the bending portion is bent relative to the main body portion by hot riveting.

[0006] A method for manufacturing a valve device, the valve device comprising a stator assembly and a housing portion, the method for manufacturing the valve device comprising the following steps:

[0007] The stator assembly is used as an insert to form the shell portion by injection molding; the shell portion includes a support portion, and the entirety or a portion of the support portion is pre-formed into a structure extending in the axial direction;

[0008] The support portion is heated and bent inward or outward to form a bent portion.

[0009] An embodiment of the present application provides a valve device, which includes a coil assembly and a valve component. The coil assembly includes a shell portion, the shell portion includes a support portion, the support portion is arranged at the lower end of the shell portion, the shell portion has a limit groove, at least part of the seal is located in the limit groove, the support portion includes a main body portion and a bending portion, the bending portion is at a certain angle relative to the main body portion, the main body portion and the bending portion constitute at least a part of the limit groove, and the bending portion is bent relative to the main body portion by hot riveting. With this arrangement, the formation of the coil assembly is relatively simple, and the structure of the valve device is also relatively simple, which is conducive to improving the installation efficiency of the valve device. Accordingly, an embodiment of the present application provides a method for manufacturing a valve device, which is conducive to simplifying the manufacturing process of the valve device. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a front view structural schematic diagram of a first embodiment of the valve device provided by the present application from one viewing angle;

[0011] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure of the middle valve device along the AA plane;

[0012] Figure 3 yes Figure 2 A schematic diagram of the enlarged structure of the middle part A;

[0013] Figure 4 yes Figure 2 A schematic cross-sectional view of the combined structure of the coil assembly and the seal from one perspective;

[0014] Figure 5 yes Figure 2 A schematic cross-sectional view of the coil assembly from one perspective;

[0015] Figure 6 yes Figure 5 A schematic cross-sectional view of the structure of the middle coil assembly before ultrasonic heat riveting the support portion;

[0016] Figure 7 is a schematic cross-sectional structural diagram of a combined structure of a coil assembly and a sealing member in a second embodiment of a valve device from one viewing angle;

[0017] Figure 8 yes Figure 7 A schematic cross-sectional view of the coil assembly from one perspective;

[0018] Fig. 9 yes Figure 7 A schematic diagram of the three-dimensional structure of the middle seal from one perspective;

[0019] Fig.10 yes Fig. 9 A schematic cross-sectional view of the middle seal from one perspective;

[0020] Fig.11 is a schematic cross-sectional structural diagram of a third embodiment of a valve device from one viewing angle;

[0021] Fig.12 yes Fig.11 Schematic diagram of the enlarged structure of part B in the middle. DETAILED DESCRIPTION

[0022] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. In order to fully understand the present invention, many specific details are mentioned in the following detailed description. However, it should be understood by those skilled in the art that the specific components, devices and features illustrated in the accompanying drawings and described herein are merely exemplary and should not be regarded as limiting.

[0023] The valve device 100 can be used in automotive, household or commercial air conditioning cooling systems, and can also be used in automotive battery cooling systems or battery cooling systems in other fields. In the above-mentioned cooling systems, the valve device 100 is generally used as a throttling element or a switching element, or as an element with both throttling and switching functions. This application is described with the valve device 100 as a throttling element.

[0024] refer to Figure 1-Figure 2 , schematically introduces an embodiment of a valve device 100 as a throttling element. The valve device 100 includes a coil assembly 1, a valve component 2 and a valve body 3. The valve component 2 has a sleeve 21 and a valve seat assembly 22, the sleeve 21 is fixedly connected to the valve seat assembly 22, and the connection between the two is sealed, and the connection method includes welding, bonding, etc. The coil assembly 1 has a receiving cavity 13, and at least part of the sleeve 21 is located in the receiving cavity 13 of the coil assembly 1. The valve body 3 has a valve body cavity 31, and at least part of the valve seat assembly 22 is located in the valve body cavity 31 of the valve body 3. The valve seat assembly 22 is fixedly connected to the valve body 3, and the connection method includes threaded connection or connection through a threaded member. The valve body 3 can be a separate valve block, or it can be a part of other components, for example, it can be a part of a heat exchanger or a flow channel plate in a cooling system. This application takes the valve body 3 as a separate valve block as an example for explanation, the valve component 2 is first fixedly connected to the valve body 3, and the coil assembly 1 is then sleeved on the outer periphery of the valve component 2 and fixedly connected to the valve body 3, and the connection method includes screw connection, clamping, etc.

[0025] The coil assembly 1 includes a shell 11 and a stator assembly 12. The shell 11 is made of plastic. In this embodiment, the stator assembly 12 is used as an insert and is formed by injection molding. The shell 11 covers part of the stator assembly 12, and the stator assembly 12 is located outside the sleeve 21. In other embodiments, the shell 11 and the stator assembly 12 can be a split structure. The shell 11 is formed by injection molding, and the shell 11 forms a cavity. The stator assembly 12 can be installed in the cavity formed by the shell 11 and is fixedly connected to the shell 11. The connection method includes screw connection, clamping, etc. The valve component 2 also includes a rotor assembly 23, and the rotor assembly 23 is located in the inner cavity formed by the sleeve 21. The valve component 2 also includes a screw valve core assembly 24 and a nut assembly 25. The screw valve core assembly 24 is fixedly connected to the rotor assembly 23, and the screw valve core assembly 24 and the nut assembly 25 are threadedly matched. When a predetermined current is passed through the stator assembly 12, an excitation magnetic field can be generated to drive the rotor assembly 23 to rotate. The rotor assembly 23 can drive the screw valve core assembly 24 to rotate. The screw valve core assembly 24 can move relative to the upper and lower axes of the valve port 221 set on the valve seat assembly 22, and the valve core portion 241 set on the screw valve core assembly 24 cooperates with the valve port 221 to adjust the flow area of ​​the valve port 221, thereby adjusting the flow rate of the refrigerant in the cooling system.

[0026] refer to Figure 2-Figure 6In this embodiment, the valve device 100 includes a seal 4, which is fixedly connected or limitedly connected to the coil assembly 1. At least a portion of the seal 4 is pressed by the coil assembly 1 and the valve component 2. The seal 4 is made of rubber. In other embodiments, it can also be made of polytetrafluoroethylene or other materials. The seal 4 plays a sealing role to prevent external gas or liquid from entering the gap between the coil assembly 1 and the sleeve 21, which will have an adverse effect on the valve device 100, such as causing corrosion of the stator claw pole of the stator assembly 12. The shell 11 includes a support portion 111, which is arranged at the lower end of the shell 11. The shell 11 has a limiting groove 1113, and at least a portion of the seal 4 is located in the limiting groove 1113. The support portion 111 includes a main body 1111 and a bending portion 1112. The bending portion 1112 is bent at a certain angle relative to the main body 1111. The main body 1111 and the bending portion 1112 constitute at least a portion of the limiting groove 1113. At least a portion of the seal 4 is located in the limiting groove 1113. In the present application, the bending portion 1112 is bent relative to the main body 1111 by hot riveting, and the hot riveting method includes ultrasonic hot riveting. With this arrangement, the seal 4 can be pre-fixed or limited on the coil assembly 1 with the coil assembly 1, which is conducive to the transportation of the two as a component and convenient transportation; it is also conducive to the installation of the two as a component with the valve component 2 and the valve body 3, which can reduce the installation process and improve the installation efficiency. Furthermore, if the limiting groove 1113 is formed by traditional injection molding, there will be a problem of difficulty in demolding. However, by using the ultrasonic heat riveting method of the present application, the bending portion 1112 is bent relative to the main body 1111 to form the limiting groove 1113. The processing method is simpler and it is also beneficial to reduce production costs.

[0027] refer to Figure 2-Figure 6 In this embodiment, the shell 11 covers part of the stator assembly 12 by injection molding, and the whole or part of the support portion 111 is pre-injected into a cylindrical structure extending in the axial direction. In this embodiment, before processing the bending portion 1112, the support portion 111 is roughly a cylindrical structure. As long as the cylindrical structure can meet the requirements of convenient demoulding, it is within the protection scope of this application. In this embodiment, the support portion 111 is roughly a straight cylindrical structure. With this arrangement, there is no problem of difficult demoulding, which can facilitate the injection molding of the coil assembly 1. For the straight cylindrical support portion 111, a part of the support portion 111 is melted by ultrasonic wave, and the end portion of the support portion 111 is bent to form the bending portion 1112 by ultrasonic hot riveting tooling. In this embodiment, the connection between the main body 1111 and the bending portion 1112 is ultrasonically melted. Such an arrangement is conducive to the processing and forming of the final coil assembly 1, convenient for large-scale manufacturing, and also conducive to reducing manufacturing costs.

[0028] Combination Figure 1-Figure 6In the first embodiment of the present application, after the bending portion 1112 is machined and formed, the shape and position of the main body 1111 of the support portion 111 remain unchanged, and the bending portion 1112 is arranged to extend in the radial direction toward the direction of the valve component 2. The limiting groove 1113 has an opening in the radial direction toward the valve component 2, and the upper end surface in the radial direction toward the bending portion 1112 can support the seal 4, and the seal 4 is pressed between the main body 1111 and the valve component 2. Specifically, the seal 4 can be pressed between the main body 1111 and the sleeve 21, or the seal 4 can be pressed between the main body 1111 and the valve seat assembly 22. Of course, the seal 4 can contact both the sleeve 21 or the valve seat assembly 22. In this embodiment, the bending portion 1112 is arranged to be roughly flush with the horizontal direction, so that the installation and limiting of the seal 4 can be more convenient. In this embodiment, the seal 4 is an O-ring, and the structure is relatively simple. In other embodiments, the seal 4 can be, for example, a T-shaped structure, a concave structure, etc.

[0029] Combination Figure 7-10 , and refer to Figure 2 In the second embodiment of the present application, after the bending portion 1112 is machined and formed, the shape and position of the main body 1111 of the support portion 111 remain unchanged, and the bending portion 1112 is configured to extend in a radial direction away from the valve component 2. The limiting groove 1113 has an opening facing outward in the radial direction, and the upper end surface of the bending portion 1112 can support the sealing member 4.

[0030] In this embodiment, the sealing member 4 includes a sealing portion 41, a transition portion 42 and a hook portion 43, and the sealing portion 41 is connected to the hook portion 43 through the transition portion 42. The sealing portion 41, the transition portion 42 and the hook portion 43 surround a receiving groove 44, and part of the support portion 111 is located in the receiving groove 44. The end of the hook portion 43 is inserted into the limiting groove 1113. Specifically, in this embodiment, the end of the hook portion 43 has a hook 431 extending inwardly in the radial direction, and the hook 431 is embedded in the receiving groove 44, so that the sealing member 4 cannot be disengaged relative to the support portion 111, thereby limiting the position of the sealing member 4 relative to the coil assembly 1. The sealing portion 41 is pressed between the main body 1111 and the valve component 2. Specifically, the sealing member 4 can be pressed between the main body 1111 and the sleeve 21, or the sealing member 4 can be pressed between the main body 1111 and the valve seat assembly 22. Of course, the sealing member 4 can contact both the sleeve 21 or the valve seat assembly 22.

[0031] Combination Figure 11-Figure 12 , and refer to Figure 2In the third embodiment of the present application, the sleeve 21 includes a large diameter portion 211 and a small diameter portion 212, and the large diameter portion 211 is arranged closer to the valve seat assembly 22 than the small diameter portion 212. In this embodiment, the sleeve 21 is an integral structure, and the large diameter portion 211 is formed by integral stamping. The thickness of the large diameter portion 211 and the small diameter portion 212 are substantially equal. The large diameter portion 211 is expanded by stamping, which can simplify the processing of the sleeve 21. The inner side of the seal 4 abuts against the outer peripheral wall of the large diameter portion 211, and the seal 4 or the sealing portion of the seal 4 is pressed between the support portion 111 and the large diameter portion 211.

[0032] Combination Figure 11-Figure 12 , and refer to Figure 2 In this embodiment, after the coil assembly 1 and the seal 4 are pre-fixed or pre-limited, the coil assembly 1 and the seal 4 are assembled with the valve component 2 as a whole, and the sleeve 21 needs to extend into the accommodating cavity 13 formed by the coil assembly 1. In this embodiment, the coil assembly 1 is connected to the valve body 3 through the connecting member 6, and the connection method is screw connection. Of course, in other embodiments, it can also be clamping. In this embodiment, the coil assembly 1 also has a cover component 112, and the cover component 112 is located at the upper end of the coil assembly 1. The cover component 112 extends upward from the upper end of the coil assembly 1. The cover component 112 is formed integrally with the shell part 11 or formed separately and then fixedly connected. The cover component 112 forms part of the accommodating cavity 13. Due to the existence of the cover component 112, during the installation of the coil assembly 1 and the valve component 2 of the valve device 100, the sleeve 21 will compress the air in the accommodating cavity 13, resulting in assembly difficulties. In this embodiment, since the sleeve 21 is provided with a small diameter portion 212 and a large diameter portion 211, and the outer diameter of the large diameter portion 211 is set to be larger than the outer diameter of the small diameter portion 212, when the sleeve 21 is extended into the accommodating chamber 13, the small diameter portion 212 first cooperates with the side wall forming the accommodating chamber 13. In this process, the outer peripheral wall of the small diameter portion 212 does not contact the inner peripheral wall of the sealing member 4, or contacts with a very small mutual friction force. In this process, the sleeve 21 will not compress the air in the accommodating chamber 13 or the degree of compression is very small, and the assembly process becomes easy. In the final stage of the sleeve 21 extending into the accommodating chamber 13, the sealing member 4 will contact the large diameter portion 211 and be pressed between the outer peripheral wall of the coil assembly 1 and the large diameter portion 211, and the sealing member 4 will play a sealing role.

[0033] Combination Figure 7-Figure 8 , and refer to Figure 2In the fourth embodiment of the valve device 100, the housing 11 includes a cover member 112, the cover member 112 is extended upward from the upper end of the stator assembly 12, a part of the sleeve 21 is located in the inner cavity formed by the cover member 112, and the cover member 112 has an exhaust hole 1121. The valve device 100 also includes a waterproof breathable membrane 5, the waterproof breathable membrane 5 is fixedly connected to the cover member 112, and the waterproof breathable membrane 5 covers the exhaust hole 1121. Specifically, the waterproof breathable membrane 5 is fixed to the inner side of the top of the cover member 112, and the waterproof breathable membrane 5 and the cover member 112 are fixed by pressing, bonding, or welding, and form an annular connection portion, which is arranged around the inner opening of the exhaust hole 1121. The gas in the accommodating cavity 13 can be discharged from the accommodating cavity 13 through the waterproof breathable membrane 5, and the water or water vapor outside the accommodating cavity 13 cannot enter the accommodating cavity 13 through the waterproof breathable membrane 5. Such a configuration can also prevent suffocation during assembly, reduce the difficulty of assembling the valve member 2 and the coil assembly 1, and improve the reliability of assembly.

[0034] In this embodiment, the valve device 100 further includes an electric control box 15 and an electric control board 16. The electric control box 15 has a box cavity 151. The electric control board 16 is located in the box cavity 151. At least part of the cover member 112 is located in the box cavity 151. The exhaust hole 1121 connects the accommodating chamber 13 with the box cavity 151. The electric control box 15 further includes a connector 152. The valve device 100 is connected to an external device through the connector 152, such as through a male connector. The connector 152 has a plug-in cavity 1521. The electric control box 15 further includes a second exhaust hole 1522. The second exhaust hole 1522 connects the box cavity 151 with the plug-in cavity 1521. When assembled in this way, the gas in the accommodating chamber 13 can be discharged to the outside of the valve device 100 through the exhaust hole 1121, the box cavity 151, and the second exhaust hole 1522. When the connector 152 is connected to the male plug of the external device, a seal is formed between the connector 152 and the male plug, so that the second exhaust hole 1522 can be indirectly sealed. Such an arrangement can further reduce the difficulty of assembling the valve component 2 and the coil assembly 1 and improve the reliability of the assembly.

[0035] refer to Figure 2-Figure 8 The present application also provides a method for manufacturing a valve device 100. The valve device 100 may have the same structure as the valve device 100 in the aforementioned embodiment. The valve device 100 includes a coil assembly 1, the coil assembly 1 includes a stator assembly 12 and a housing portion 11, and the method for manufacturing the valve device 100 includes the following steps:

[0036] The stator assembly 12 is used as an insert, and the shell portion 11 is formed by injection molding; the coil assembly 1 includes the shell portion 11, the shell portion 11 is formed by injection molding, the shell portion 11 covers a part of the stator assembly 12, and the shell portion 11 includes a support portion 111, and the support portion 111 is pre-formed into a cylindrical structure extending in the axial direction;

[0037] The support portion 111 is heated and bent inward or outward to form a bent portion.

[0038] In this embodiment, a portion of the support portion 111 is melted by ultrasonic wave, so that the support portion 111 forms a bending portion 1112, the bending portion 1112 is bent at a certain angle relative to the main body 1111, and the bending portion 1112 and the main body 1111 of the support portion 111 form a limiting groove 1113;

[0039] The sealing member 4 is placed in the limiting groove 1113 , and the bending portion 1112 can limit the sealing member 4 relative to the supporting portion 111 .

[0040] In this embodiment, the bending portion 1112 extends radially inward or outward, and a part of the support portion 111 is melted by ultrasonic wave and bent to form the bending portion 1112. For the cylindrical support portion 111, a part of the support portion 111 is melted by ultrasonic wave, and the end part of the support portion 111 is bent by ultrasonic hot riveting tooling to form the bending portion 1112. In this embodiment, the connection between the main body 1111 and the bending portion 1112 is melted by ultrasonic wave. The manufacturing method provided in the embodiment of the present application can solve the problem that the limiting groove 1113 is difficult to demold when processed by injection molding, which is convenient for large-scale manufacturing and also helps to reduce manufacturing costs.

[0041] It should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail in this specification with reference to the above embodiments, it should be understood by those skilled in the art that the present invention can still be modified or replaced by equivalents, and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A valve device (100), characterized in that: The valve device (100) comprises a coil assembly (1) and a valve component (2), wherein the coil assembly (1) is arranged on the outer periphery of the valve component (2), and the valve device (100) further comprises a sealing member (4), wherein at least a portion of the sealing member (4) is pressed tightly by the coil assembly (1) and the valve component (2), and the coil assembly (1) comprises a shell portion (11), wherein the shell portion (11) comprises a support portion (111), and the support portion (111) is arranged at the lower end of the shell portion (11), and the shell portion (11) has A limiting groove (1113), at least a portion of the sealing component (4) is located in the limiting groove (1113), the supporting portion (111) comprises a main body portion (1111) and a bending portion (1112), the bending portion (1112) is at a certain angle relative to the main body portion (1111), the main body portion (1111) and the bending portion (1112) constitute at least a portion of the limiting groove (1113), and the bending portion (1112) is bent relative to the main body portion (1111) by hot riveting.

2. The valve device (100) according to claim 1, characterized in that The coil assembly also includes a stator assembly (12); the shell portion (12) is made of plastic material; the shell portion (11) covers a portion of the stator assembly (12); or the shell portion (11) and the stator assembly (12) are separate structures; the shell portion (11) and the stator assembly (12) are fixedly connected; the whole or a part of the support portion (111) is pre-injected into a structure extending in the axial direction; a part of the support portion (111) is melted by ultrasonic wave and bent to form the bent portion (1112).

3. The valve device (100) according to claim 1 or 2, characterized in that: The bent portion (1112) extends in a radial direction toward the valve component (2), and the limiting groove (1113) has an opening in a radial direction toward the valve component (2). The upper end surface of the bent portion (1112) can support the sealing member (4), and the sealing member (4) is pressed by the main body (1111) and the valve component (2).

4. The valve device (100) according to claim 1 or 2, characterized in that: The bent portion (1112) extends in a radial direction away from the valve component (2), the limiting groove (1113) has an opening facing outward in the radial direction, and the upper end surface of the bent portion (1112) is capable of supporting the sealing member (4).

5. The valve device (100) according to claim 4, characterized in that The sealing member (4) comprises a sealing portion (41), a transition portion (42) and a hook portion (43); the sealing portion (41) and the hook portion (43) are connected via the transition portion (42); the sealing portion (41), the transition portion (42) and the hook portion (43) form a receiving groove (44); part of the supporting portion (111) is located in the receiving groove (44); the end of the hook portion (43) is inserted into the limiting groove (1113); and the sealing portion (41) is pressed by the main body portion (1111) and the valve component (2).

6. The valve device (100) according to claim 3 or 5, characterized in that: The valve component (2) includes a sleeve (21) and a valve seat assembly (22), wherein the sleeve (21) is fixedly connected to the valve seat assembly (22) and sealed at the connection; the sleeve (21) includes a large diameter portion (211) and a small diameter portion (212), wherein the large diameter portion (211) is closer to the valve seat assembly (22) than the small diameter portion (212), and the inner side portion of the sealing element (4) abuts against the outer peripheral wall of the large diameter portion (211), and the sealing element (4) or the sealing portion of the sealing element (4) is pressed between the support portion (111) and the large diameter portion (211).

7. The valve device (100) according to claim 3, 5 or 6, characterized in that: The valve component (2) further comprises a rotor assembly (23), wherein the rotor assembly (23) is located in an inner cavity formed by the sleeve (21); the outer shell (11) comprises a cover component (112), wherein the cover component (112) is extended upward from an upper end portion of the stator component (12), wherein a portion of the sleeve (21) is located in the inner cavity formed by the cover component (112), and wherein the cover component (112) has an exhaust hole (1121); the valve device (100) further comprises a waterproof and breathable membrane (5), wherein the waterproof and breathable membrane (5) is fixedly connected to the cover component (112), and wherein the waterproof and breathable membrane (5) covers the exhaust hole (1121).

8. A method for manufacturing a valve device, characterized in that: The valve device (100) comprises a stator assembly (12) and a housing portion (11), and a method for manufacturing the valve device comprises the following steps: The stator assembly (12) is used as an insert to form the shell portion (11) by injection molding; the shell portion (11) comprises a support portion (111), and the entirety or a portion of the support portion (111) is pre-formed into a structure extending in the axial direction; The support portion (111) is heated and bent inwardly or outwardly to form a bent portion.

9. The method for manufacturing a valve device according to claim 8, characterized in that: Melting a portion of the support portion (111) by ultrasonic wave, so that the support portion (111) forms a bending portion (1112), wherein the bending portion (1112) and the main body (1111) of the support portion (111) form a limiting groove (1113); The sealing member (4) is placed in the limiting groove (1113), and the bending portion (1112) can limit the sealing member (4) relative to the supporting portion (111).

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