An electrically operated valve

Abstract

The application discloses an electric valve, which comprises a valve body component and an actuator, the valve body component comprises a valve body and a valve rod, the valve body is provided with a first connecting part, the valve rod is partially arranged inside the first connecting part, the actuator is provided with a second connecting part, the first connecting part and the second connecting part are sleeved with each other, the first connecting part and the second connecting part are correspondingly provided with a communication hole, the electric valve further comprises a clamping piece, the clamping piece penetrates through the communication hole so as to limit and connect the valve body component and the actuator, the clamping piece is provided with a clamping groove, the valve rod is axially limited in the clamping groove, and the valve rod can be circumferentially rotated relative to the clamping piece. The electric valve simultaneously realizes the connection of the valve body component and the actuator and the axial limitation of the valve rod through one clamping piece, the structure of the electric valve is simplified, and the manufacturing cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of valve technology, and more specifically to an electric valve. Background Technology

[0002] In existing electric valves, the connection between the actuator and the valve body assembly, as well as the limiting of the top-mounted valve stem, are generally achieved through the following methods:

[0003] First, fix the mounting plate to the valve body assembly with screws to limit the valve stem. Then, fix the actuator to the mounting plate with screws to connect the actuator to the valve body assembly.

[0004] As can be seen, the connection between the actuator and the valve body requires a mounting plate and multiple screws, making the connection structure quite complex. Summary of the Invention

[0005] The purpose of this invention is to provide an electric valve that, while facilitating the connection between the actuator and valve body components, can limit the valve stem and simplify the connection structure.

[0006] To solve the above-mentioned technical problems, the present invention provides an electric valve, including a valve body component and an actuator. The valve body component includes a valve body and a valve stem. The valve body has a first connecting portion, and the valve stem portion is located inside the first connecting portion. The actuator has a second connecting portion. The first connecting portion and the second connecting portion are sleeved on each other, and the first connecting portion and the second connecting portion are respectively provided with communicating holes.

[0007] It also includes a snap-fit ​​component that passes through the connecting hole to limit the connection between the valve body component and the actuator. The snap-fit ​​component has a slot, and the valve stem is axially limited in the slot. The valve stem can rotate circumferentially relative to the snap-fit ​​component.

[0008] This invention improves the structure of the electric valve so that the same snap-fit ​​component can both limit the connection between the valve body and the actuator, and also limit the axial movement of the valve stem. Furthermore, the snap-fit ​​component and the valve stem can rotate relative to each other in the circumferential direction, which facilitates the connection between the actuator and the valve body while limiting the valve stem and simplifies the connection structure. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of a specific embodiment of the electric valve provided by the present invention;

[0010] Figure 2 for Figure 1 A schematic diagram of the electric valve at the second angle;

[0011] Figure 3 for Figure 2 Cross-sectional view of the electric valve along the AA direction;

[0012] Figure 4 for Figure 1 Component diagram of the electric valve;

[0013] Figure 5 for Figure 1 Axial sectional view of the electric valve;

[0014] Figure 6 for Figure 1 A schematic diagram of the valve body components in an electric valve;

[0015] Figure 7 for Figure 6 A schematic diagram of the valve body component from the second angle;

[0016] Figure 8 for Figure 6 A schematic diagram of the valve stem in the valve body assembly;

[0017] Figure 9 for Figure 1 Schematic diagram of the actuator in an electric valve;

[0018] in, Figures 1-9 The annotations in the accompanying drawings are explained as follows:

[0019] 1-Valve body components;

[0020] 11-Valve body;

[0021] 111-First connecting part;

[0022] 12-Valve stem;

[0023] 121-Large diameter section;

[0024] 122 - Small section;

[0025] 12a - Annular limiting groove;

[0026] 12A - Abutment Wall;

[0027] 13 - Sealing ring;

[0028] 2-Actuator;

[0029] 21-Second connecting part;

[0030] a-Connecting hole;

[0031] 3-Card connector;

[0032] 31-Connecting shaft. Detailed Implementation

[0033] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] The term "multiple" as used in this article usually refers to two or more components; and when "multiple" is used to indicate the quantity of certain components, it does not indicate the relationship between these components in terms of quantity.

[0035] Please refer to Figures 1-5 , Figure 8 , Figure 1 This is a schematic diagram of a specific embodiment of the electric valve provided by the present invention; Figure 2 for Figure 1 A schematic diagram of the electric valve at the second angle; Figure 3 for Figure 2 Cross-sectional view of the electric valve along the AA direction; Figure 4 for Figure 1 Component diagram of the electric valve; Figure 5 for Figure 1 Axial sectional view of the electric valve; Figure 8 for Figure 6 A schematic diagram of the valve stem in the valve body assembly.

[0036] This invention provides an electric valve, including a valve body component 1 and an actuator 2. The valve body component 1 includes a valve body 11 and a valve stem 12. The valve body 11 has a first connecting portion 111, and the valve stem 12 is partially located inside the first connecting portion 111. The actuator 2 has a second connecting portion 21, and the first connecting portion 111 and the second connecting portion 21 are sleeved together. The first connecting portion 111 and the second connecting portion 21 are respectively provided with a communicating hole a.

[0037] It also includes a snap-fit ​​component 3, which passes through the connecting hole a to limit the connection between the valve body component 1 and the actuator 2. The snap-fit ​​component 3 is provided with a snap-fit ​​groove, and the valve stem 12 is axially limited in the snap-fit ​​groove. The valve stem 12 can rotate circumferentially relative to the snap-fit ​​component 13.

[0038] This invention improves the structure of the electric valve so that the same snap-fit ​​3 can both limit the connection between the valve body component 1 and the actuator 2 and limit the axial movement of the valve stem 12. Furthermore, the snap-fit ​​3 and the valve stem 12 can rotate relative to each other in the circumferential direction, avoiding interference between the snap-fit ​​3 and the rotation of the valve stem 12. This allows for convenient connection between the valve body component 1 and the actuator 2 while limiting the movement of the valve stem 12. Thus, compared with the structure of existing electric valves, the electric valve of this invention has a simpler structure and reduces manufacturing costs.

[0039] Please refer to Figures 3-9 , Figure 6 for Figure 1 A schematic diagram of the valve body components in an electric valve; Figure 7 for Figure 6 A schematic diagram of the valve body component from the second angle; Figure 9 for Figure 1 A schematic diagram of the actuator in an electric valve.

[0040] Depend on Figure 4 As can be seen, in this embodiment, the first connecting part 111 and the second connecting part 21 are respectively provided with connecting holes a on both radial sides of the valve stem 12. The snap-fit ​​member 3 has a U-shaped structure. The rod portion extending from the closed end to the open end in the snap-fit ​​member 3 forms a connecting shaft 31. It can be seen that the snap-fit ​​member 3 includes two connecting shafts 31 and a curved transition portion. The two connecting shafts 31 can be arranged approximately in parallel. The two connecting shafts 31 are connected through the transition portion, and the aforementioned snap-fit ​​groove is formed between the two connecting shafts 31. Figure 5 It can be seen that the valve stem 12 has an abutment wall 12A facing upward; in the installed state, the connecting shaft 31 passes through the connecting hole a on the corresponding side, and the connecting shaft 31 abuts against the abutment wall 12A, or there is a gap between the connecting shaft 31 and the abutment wall 12A.

[0041] The connecting hole a includes a front connecting hole and a rear connecting hole. The front connecting hole is closer to the transition part than the rear connecting hole. During installation, the front connecting hole guides the snap-fit ​​part 3. The connecting shaft 31 of the snap-fit ​​part 3 is inserted through the front connecting hole. That is, part of the connecting shaft 31 is clearance-fitted with the hole wall of the front connecting hole, and part of the connecting shaft 31 is tightly fitted with the hole wall of the rear connecting hole to prevent the snap-fit ​​part 3 from detaching from the actuator 2 or the valve body component 1. It should be noted that when tightly fitted with the hole wall of the rear connecting hole, the connecting shaft 31 can be tightly fitted with the rear connecting hole located in the actuator 2 and / or with the rear connecting hole located in the valve body component 1.

[0042] Thus, the first connecting part 111 and the second connecting part 21 are connected by two connecting shafts 31, which are radially spaced and evenly stressed, ensuring the connection stability of the first connecting part 111 and the second connecting part 21. At the same time, the two connecting shafts 31 are located on both radial sides of the valve stem 12, and the connecting shafts 31 abut against the upper end of the valve stem 12 or have a gap with the abutment wall 12A, which serves to limit the axial movement of the valve stem 12. Furthermore, the valve stem 12 is evenly stressed on both radial sides, preventing the valve stem 12 from tilting axially and ensuring reliable limiting of the valve stem 12.

[0043] Furthermore, when there is a gap between the connecting shaft 31 and the abutment wall 12A, the valve stem 12 has an axial clearance. When the valve stem 12 moves to the point where the limiting shaft 31 abuts against the abutment wall 12A, the valve stem 12 cannot move further upward. At this point, the valve stem 12 moves to its uppermost position, thus achieving axial limiting of the valve stem 12. Simultaneously, the gap between the connecting shaft 31 and the abutment wall 12A also prevents the connecting shaft 31 from interfering with the rotation of the valve stem 12, ensuring the operating performance of the electric valve.

[0044] It is understandable that, in practice, the snap-fit ​​component 3 is not limited to the U-shaped structure described above. For example, the snap-fit ​​component 3 may include two independent connecting shafts 31. Alternatively, in practice, the snap-fit ​​component 3 may also be a right-angled U-shape, in which case the transition portion is also a straight line.

[0045] Please refer to Figure 5 and Figure 8 In this embodiment, the valve stem 12 includes a large-diameter section 121 and a small-diameter section 122 connected sequentially from bottom to top, and the aforementioned abutment wall 12A is formed between the small-diameter section 122 and the large-diameter section 121. The abutment wall 12A cooperates with the connecting shaft 31 to achieve axial limiting of the valve stem 12.

[0046] It is understandable that, in practice, the structure of the valve stem 12 is not limited. For example, the valve stem 12 may include a central stem portion with a constant diameter, and an annular step portion is provided on the outer periphery of the central stem portion. The upper end wall of the annular step portion forms the aforementioned abutment wall 12A.

[0047] like Figure 7 and Figure 8 As shown, the diameter of the larger diameter section 121 is D1, the diameter of the smaller diameter section 122 is D2, and the distance between the relative peripheral walls of the two connecting shafts 31 is W1, where D2 < W1 < D1.

[0048] As set above, D2 < W1, meaning that in the installation state, there is a gap between the connecting shaft 31 and the peripheral wall of the small diameter section 122 to avoid interference of the connecting shaft 31 with the rotation of the valve stem 12 and to ensure the operating performance of the electric valve; while W1 < D1, ensuring that the connecting shaft 31 can abut against the abutment wall 12A in the installation state, which plays a role in axially limiting the valve stem 12.

[0049] Please continue to refer to this. Figure 5 and Figure 8 The valve stem 12 has a large diameter section 121 with an annular receiving groove 12a and a sealing ring 13. The sealing ring 13 is installed inside the annular receiving groove 12a and the outer edge of the sealing ring 13 is circumferentially fitted to the inner wall of the valve body 11.

[0050] As set up above, the annular receiving groove 12a is used to receive the sealing ring 13, ensuring the installation reliability of the sealing ring 13, and the sealing ring 13 achieves circumferential sealing between the valve stem 12 and the valve body 11.

[0051] Please continue to refer to this. Figure 5 In this embodiment, the second connecting part 21 is fitted around the outer periphery of the first connecting part 111.

[0052] Of course, the second connecting part 21 and the first connecting part 111 are nested together. Not only can the second connecting part 21 be nested around the outer periphery of the first connecting part 111, but it is also possible for the first connecting part 111 to be nested around the outer periphery of the second connecting part 21.

[0053] Furthermore, the inner peripheral wall of the second connecting portion 21 has a limiting wall facing downwards, and the end wall of the first connecting portion 111 abuts against the limiting wall.

[0054] As set up above, during the assembly of valve body component 1 and actuator 2, the second connecting part 21 can be fitted onto the outer periphery of the first connecting part 111, so that the first connecting part 111 abuts against the limiting wall along the axial direction. At this time, the corresponding connecting holes a in the first connecting part 111 and the second connecting part 21 are aligned, which makes it easy to insert the snap-fit ​​3 into the connecting hole a to connect the valve body component 1 and actuator 2, thereby improving the operational convenience during the electric valve assembly process.

[0055] During the operation of the electric valve, the first connecting part 111 abuts against the limiting wall along the axial direction and can share the axial force of the electric valve with the connecting shaft 31, thereby preventing the connecting shaft 31 from shearing failure and improving the service life of the connecting shaft 31.

[0056] like Figure 6 and Figure 9 As shown, in this embodiment, at least the position of the connecting hole a is a plane in the outer peripheral wall of the first connecting part 111 and the second connecting part 21, which facilitates the processing of the connecting hole a.

[0057] The electric valve provided by this invention has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this invention. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this invention. It should be noted that those skilled in the art can make several improvements and modifications to this invention without departing from the principle of this invention, and these improvements and modifications also fall within the protection scope of the claims of this invention.

Claims

1. An electric valve, comprising a valve body component (1) and an actuator (2), said valve body component (1) comprising a valve body (11) and a valve stem (12), characterized in that, The valve body (11) has a first connecting part (111), the valve stem (12) is located inside the first connecting part (111), the actuator (2) has a second connecting part (21), the first connecting part (111) and the second connecting part (21) are sleeved together, and the first connecting part (111) and the second connecting part (21) are respectively provided with a connecting hole (a). It also includes a snap-fit ​​component (3), which passes through the connecting hole (a) to limit the connection between the valve body component (1) and the actuator (2). The snap-fit ​​component (3) is provided with a slot, and the valve stem (12) is axially limited in the slot. The valve stem (12) can rotate circumferentially relative to the snap-fit ​​component (3). The first connecting part (111) and the second connecting part (21) are respectively provided with the connecting hole (a) on both radial sides of the valve stem (12). The snap-fit ​​member (3) includes two connecting shafts (31) forming the snap groove between the two connecting shafts (31). The valve stem (12) has an abutment wall (12A) facing upward. The connecting shaft (31) passes through the communicating hole (a) on the corresponding side. The connecting shaft (31) abuts against the abutment wall (12A) or has a gap with the abutment wall (12A).

2. The electric valve according to claim 1, characterized in that, The snap-fit ​​component (3) also includes a transition section, through which the two connecting shafts (31) are connected. The connecting hole (a) includes a front connecting hole and a rear connecting hole. The front connecting hole is closer to the transition section than the rear connecting hole. Part of the connecting shaft (31) is clearance-fitted with the hole wall of the front connecting hole, and another part of the connecting shaft (31) is tight-fitted with the hole wall of the rear connecting hole.

3. The electric valve according to claim 1, characterized in that, The snap-fit ​​component (3) has a U-shaped structure.

4. The electric valve according to claim 1, characterized in that, The valve stem (12) includes a large-diameter section (121) and a small-diameter section (122) connected sequentially from bottom to top, and the abutment wall (12A) is formed between the small-diameter section (122) and the large-diameter section (121).

5. The electric valve according to claim 4, characterized in that, The diameter of the larger diameter segment (121) is D1, the diameter of the smaller diameter segment (122) is D2, and the distance between the relative peripheral walls of the two connecting shafts (31) is W1, where D2 < W1 < D1.

6. The electric valve according to claim 4, characterized in that, The large-diameter section (121) is provided with an annular receiving groove (12a) and also includes a sealing ring (13). The sealing ring (13) is installed inside the annular receiving groove (12a), and the outer edge of the sealing ring (13) and the inner wall of the valve body (11) are circumferentially fitted.

7. The electric valve according to any one of claims 1-6, characterized in that, The second connecting part (21) is fitted around the outer periphery of the first connecting part (111).

8. The electric valve according to claim 7, characterized in that, The inner peripheral wall of the second connecting part (21) has a limiting wall facing downward, and the end wall of the first connecting part (111) abuts against the limiting wall.

9. The electric valve according to any one of claims 1-6, characterized in that, At least the position of the connecting hole (a) is a plane in the outer peripheral wall of the first connecting part (111) and the second connecting part (21).

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