Electric valve

Abstract

The utility model provides an electric valve which comprises a fixing frame, a sleeve and a valve body, the sleeve and the valve body are connected with each other, and the fixing frame is arranged on the periphery of the welding position of the sleeve and the valve body in a sleeved mode. A first welding area is formed at the welding position of the fixing frame and the sleeve, a second welding area is formed at the welding position of the fixing frame and the valve body, a third welding area is formed at the welding position of the sleeve, the valve body and the fixing frame, and the first welding area, the third welding area and the second welding area are sequentially arranged at intervals in the axial direction of the electric valve. The third welding area is a whole circle of welding seam extending in the circumferential direction of the electric valve. On the premise that the welding power is not increased, the fixing frame is additionally arranged and welded to the sleeve and the valve body correspondingly, the first welding area and the second welding area which are distributed on the upper side and the lower side of the third welding area are formed, and the fixing frame, the first welding area, the second welding area and the third welding area jointly achieve dispersed bearing of pressure; the stress on the third welding area is reduced, and the connecting strength between the sleeve and the valve body is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric valve technical field, specifically, relate to a kind of electric valve. BACKGROUND

[0002] The shell of the electronic expansion valve of refrigerant CO2 is composed of a sleeve and a valve body. Since the pressure of CO2 refrigerant is high, the strength of the weld between the sleeve and the valve body needs to be higher to avoid the leakage of refrigerant caused by the breakage of the weld.

[0003] In the prior art, the welding power is usually increased to improve the welding effect. However, the increase of welding power will lead to the increase of heat-affected zone, which may affect the internal plastic nut (the plastic nut is prone to welding and may cause malfunctions such as jamming), and the excessive power may also cause pores in the weld, affecting the stability of the weld. SUMMARY

[0004] The utility model provides a kind of electric valve to improve the welding effect of valve body and sleeve.

[0005] To achieve the above purpose, the utility model provides an electric valve, the electric valve includes two two welding fixed frame, sleeve and valve body, the fixed frame is sleeved at the outer periphery of the welding position of sleeve and valve body;The welding place of fixed frame and sleeve forms first welding area, the welding place of fixed frame and valve body forms second welding area, and the welding place of sleeve and valve body forms third welding area, and first welding area, third welding area and second welding area are sequentially spaced in the axial direction of electric valve, wherein the third welding area is a whole-circle weld along the circumferential direction of electric valve.

[0006] Further, the distance between the first welding area and the third welding area in the axial direction of the electric valve is greater than 1.2 mm, and / or the distance between the second welding area and the third welding area in the axial direction of the electric valve is greater than 1.2 mm.

[0007] Further, the first welding area is a whole-circle weld along the circumferential direction of the electric valve;Or, the first welding area includes a plurality of first welds extending along the circumferential direction of the electric valve, and the plurality of first welds are sequentially arranged along the circumferential direction of the electric valve.

[0008] Further, in the case where the first welding area includes a plurality of first welds extending along the circumferential direction of the electric valve, the plurality of first welds are symmetrically distributed around the axis center of the electric valve.

[0009] Further, the second welding area is a whole-circle weld along the circumferential direction of the electric valve;Or, the second welding area includes a plurality of second welds extending along the circumferential direction of the electric valve, and the plurality of second welds are sequentially arranged along the circumferential direction of the electric valve.

[0010] Further, in the case that the second welding area is a second welding seam including multiple segments extending along the circumference of the electric valve, the multiple segments of the second welding seam are distributed symmetrically about the axis center of the electric valve.

[0011] Further, the welding penetration of the first welding area on the sleeve pipe is 0.3mm-0.6mm, and / or the welding penetration of the second welding area on the valve body is 0.3mm-0.6mm.

[0012] Further, the fixing frame is welded with the valve body and the sleeve pipe at the third welding area.

[0013] Further, the fixing frame and the sleeve pipe adopt penetration welding.

[0014] Further, the second welding area is located at the end of the fixing frame.

[0015] Further, the electric valve further comprises a valve needle assembly, a nut assembly, a sealing assembly, a rotor assembly and an external pipe, the rotor assembly and the nut assembly are arranged in the sleeve pipe, one end of the valve needle assembly passes through the nut assembly and the rotor assembly and is threadedly connected with the nut assembly, the other end of the valve needle assembly is sealingly arranged in the valve body through the sealing assembly, the valve body has multiple flow-through openings, and each flow-through opening is connected with one external pipe.

[0016] The technical scheme of the electric valve provided by the utility model, the electric valve comprises a fixing frame, a sleeve pipe and a valve body which are welded two by two, the fixing frame is sleeved on the outer periphery of the welding position of the sleeve pipe and the valve body; the welding position of the fixing frame and the sleeve pipe forms a first welding area, the welding position of the fixing frame and the valve body forms a second welding area, and the welding position of the sleeve pipe, the valve body and the fixing frame forms a third welding area; the first welding area, the third welding area and the second welding area are sequentially and spaced apart in the axial direction of the electric valve, wherein the third welding area is an integral-circle welding seam extending along the circumference of the electric valve.

[0017] In the scheme, the sleeve pipe and the valve body are connected to form a shell which needs to meet the high-pressure requirement of the CO2 refrigerant, under the premise of not increasing the welding power between the sleeve pipe and the valve body, the fixing frame is additionally arranged and welded with the sleeve pipe and the valve body respectively, thereby forming the first welding area and the second welding area which are distributed on the upper and lower sides of the original third welding area, the fixing frame, the first welding area, the second welding area and the third welding area jointly realize the dispersion of the pressure, and the situation that the third welding area is easily broken under the continuous change of the pressure in the prior art is avoided, the stress at the third welding area is reduced, the connection strength between the sleeve pipe and the valve body is improved, and the reliability of the electric valve is further ensured. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings constituting a part of the specification of the application serve to provide further understanding of the present application, the illustrative embodiments of the present application and their descriptions serve to explain the present application, and do not constitute improper limitation on the present application. In the drawings:

[0019] Figure 1 A structure schematic diagram of the electric valve provided by the embodiment of the present application is shown;

[0020] Figure 2 A structure schematic diagram of the electric valve provided by the embodiment of the present application is shown; Figure 1 An enlarged view of the A position in the middle.

[0021] Among them, the above drawings include the following reference signs:

[0022] 10, fixed frame;

[0023] 20, sleeve;

[0024] 30, valve body;

[0025] 401, first welding area; 402, second welding area; 403, third welding area;

[0026] 50, valve needle assembly;

[0027] 60, nut assembly;

[0028] 70, sealing assembly;

[0029] 80, rotor assembly;

[0030] 90, external pipe. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, and by no means constitutes any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts fall within the scope of protection of the present application.

[0032] As Figure 1 and Figure 2As shown, the embodiment of the utility model provides a kind of electric valve, electric valve includes two two welding fixed frame 10, sleeve 20 and valve body 30, fixed frame 10 is set in the outer periphery of the welding position of sleeve 20 and valve body 30;Fixed frame 10 and sleeve 20 welding place forms first welding area 401, fixed frame 10 and valve body 30 welding place forms second welding area 402, sleeve 20 and valve body 30 welding place forms third welding area 403, first welding area 401, third welding area 403 and second welding area 402 sequentially interval in the axial direction of electric valve, wherein, third welding area 403 is the whole circle weld that extends along the circumferential direction of electric valve.

[0033] In the embodiment, sleeve 20 and valve body connection form the shell that needs to meet the high pressure requirement of CO2 refrigerant, under the premise that not increasing welding power between the two, additional fixed frame 10 is welded with sleeve 20 and valve body 30 respectively, form first welding area 401 and second welding area 402 distributed on the upper and lower sides of original third welding area 403, fixed frame 10, first welding area 401, second welding area 402, third welding area 403 realize pressure dispersion load together, avoid the case that third welding area 403 is easily broken under the continuous change of pressure when only using third welding area 403 between sleeve 20 and valve body 30 to connect in prior art, the embodiment reduces the stress at third welding area 403, improves the connection strength between sleeve 20 and valve body, to ensure the reliability of electric valve.

[0034] It can be understood that third welding area 403 needs to ensure that the shell of electric valve does not leak, so whole circle closed welding is used.

[0035] Specifically, the distance between first welding area 401 and third welding area 403 in the axial direction of electric valve is greater than 1.2mm, and / or, the distance between second welding area 402 and third welding area 403 in the axial direction of electric valve is greater than 1.2mm.

[0036] In this way, by limiting the distance between first welding area 401 and third welding area 403, avoid the material heat affected zone when welding first welding area 401 and third welding area 403 from overlapping and affecting each other, leading to repeated welding and affecting material performance, ensure the reliability and stability of the forming of first welding area 401 and third welding area 403;By limiting the distance between second welding area 402 and third welding area 403, avoid the material heat affected zone when welding second welding area 402 and third welding area 403 from overlapping and affecting each other, leading to repeated welding and affecting material performance, ensure the reliability and stability of the forming of second welding area 402 and third welding area 403.

[0037] It should be noted that in the embodiment, the distance between the first welding area 401 and the third welding area 403 in the electric valve axial direction is greater than 1.2 mm, and the distance between the second welding area 402 and the third welding area 403 in the electric valve axial direction is greater than 1.2 mm.

[0038] Preferably, in the embodiment, the first welding area 401 is a whole-circle (closed) weld extending along the circumference of the electric valve, and the weld is uniformly stressed, which is conducive to improving the welding effect of the fixing frame 10 and the sleeve 20.

[0039] Or in other embodiments not shown in the figure, the first welding area 401 includes a plurality of first welds extending along the circumference of the electric valve, and the plurality of first welds are sequentially arranged along the circumference of the electric valve. In this way, the welding length can be reduced on the basis of ensuring the welding effect of the fixing frame 10 and the sleeve 20, thereby saving the welding cost.

[0040] Further, in the case where the first welding area 401 includes a plurality of first welds extending along the circumference of the electric valve, the plurality of first welds are distributed symmetrically about the center of the axis of the electric valve. In this way, the uniform distribution of the plurality of first welds can be ensured, thereby ensuring the uniform stress at the first welding area 401, ensuring the welding effect and the reliability and stability of the welding. It can be understood that the extension length and distribution of each first weld, the distance between any two adjacent first welds, etc. can be adaptively adjusted according to actual conditions, as long as the plurality of first welds are symmetrically distributed relative to the axis of the electric valve.

[0041] It can be understood that the first welding area 401 can also include first welding points. In other embodiments not shown in the figure, the first welding area 401 is formed by a plurality of first welding points, and the plurality of first welding points are distributed along the circumference of the electric valve and symmetrically distributed about the center of the axis of the electric valve; or, the first welding area 401 is formed by a plurality of first welding points and a plurality of first welds, and the plurality of first welding points and the plurality of first welds are spaced and alternately distributed along the circumference of the electric valve and symmetrically distributed about the center of the axis of the electric valve. Further, the first welding point can also be understood as a first weld with a small extension length along the circumferential direction of the electric valve.

[0042] Similarly preferably, in the embodiment, the second welding area 402 is a whole-circle (closed) weld extending along the circumference of the electric valve, and the weld is uniformly stressed, which is conducive to improving the welding effect of the fixing frame 10 and the valve body 30.

[0043] Or in other embodiments not shown in the figure, the second welding area 402 includes a plurality of second welds extending along the circumference of the electric valve, and the plurality of second welds are sequentially arranged along the circumference of the electric valve. In this way, the welding length can be reduced on the basis of ensuring the welding effect of the fixing frame 10 and the sleeve 20, thereby saving the welding cost.

[0044] Further, in the case that the second welding area 402 comprises a plurality of second welds extending along the circumference of the electric valve, the plurality of second welds are distributed symmetrically around the axis center of the electric valve. In this way, the uniform distribution of the plurality of second welds is facilitated, and the uniform stress at the second welding area 402 is ensured, and the welding effect, reliability and stability are ensured. It can be understood that the extension length and distribution of each second weld, the distance between any two adjacent second welds, etc. can be adaptively adjusted according to actual conditions, as long as the plurality of second welds are symmetrically distributed relative to the axis of the electric valve.

[0045] It can be understood that the second welding area 402 can also comprise second welding points. In other embodiments not shown in the figure, the second welding area 402 is formed by a plurality of second welding points, the plurality of second welding points are distributed along the circumference of the electric valve and symmetrically distributed around the axis center of the electric valve; or, the second welding area 402 is formed by a plurality of second welding points and a plurality of second welds, the plurality of second welding points and the plurality of second welds are spaced and alternately distributed along the circumference of the electric valve and symmetrically distributed around the axis center of the electric valve. Further, the second welding point can also be understood as a second weld with a small extension along the circumferential direction of the electric valve.

[0046] The welding penetration of the first welding area 401 on the sleeve 20 is 0.3mm-0.6mm, and / or the welding penetration of the second welding area 402 on the valve body 30 is 0.3mm-0.6mm. It should be noted that the welding penetration of the first welding area 401 on the sleeve 20 is the maximum welding depth of the first welding area 401 along the radial direction of the sleeve 20, and the welding penetration of the second welding area 402 on the valve body 30 is the maximum welding depth of the second welding area 402 along the radial direction of the valve body 30.

[0047] In this way, by limiting the welding penetration of the first welding area 401 on the sleeve 20, the case that the welding depth of the first welding area 401 on the sleeve 20 is too deep to damage or weaken the structural strength of the sleeve 20 is avoided, and the case that the welding depth of the first welding area 401 on the sleeve 20 is too shallow to cause the welding between the sleeve 20 and the fixing frame 10 to be not firm is also avoided, which is conducive to improving the stability and reliability of the welding between the sleeve 20 and the fixing frame 10; by limiting the welding penetration of the second welding area 402 on the valve body 30, the case that the welding depth of the second welding area 402 on the valve body 30 is too deep to damage or weaken the structural strength of the valve body 30 is avoided, and the case that the welding depth of the second welding area 402 on the valve body 30 is too shallow to cause the welding between the valve body 30 and the fixing frame 10 to be not firm is also avoided, which is conducive to improving the stability and reliability of the welding between the valve body 30 and the fixing frame 10.

[0048] It should be noted that in the present embodiment, the welding penetration depth of the first welding area 401 on the sleeve 20 is 0.3mm-0.6mm, and the welding penetration depth of the second welding area 402 on the valve body 30 is 0.3mm-0.6mm. It can be understood that the specific selection of the welding penetration depth can be determined according to the actual thickness of the sleeve 20 and the valve body 30.

[0049] Specifically, the sleeve 20 and the valve body 30 in the present embodiment are directly welded (laser welding or other welding methods can be used), the fixing frame 10 is sleeved on the outer periphery of the valve body 30 and the sleeve 20 and will shield the third welding area 403, thereby playing a protective role on the third welding area 403, preventing external environmental factors and the like from damaging the third welding area 403, and ensuring the reliability of the welding of the valve body 30 and the sleeve 20 and the reliability of the sealing.

[0050] Preferably, in other embodiments not shown in the figure, the fixing frame 10 is welded with the valve body 30 and the sleeve 20 at the third welding area 403. Specifically, the fixing frame 10 can be welded between the valve body 30 and the sleeve 20 by using penetration welding, the fixing frame 10 is welded through during the welding process, and the connection between the fixing frame 10 and the valve body 30 and the sleeve 20 is welded. After welding, the welding between the fixing frame 10, the valve body 30 and the sleeve 20 forms the third welding area 403. In this way, the connection strength of the sleeve 20, the valve body 30 and the fixing frame 10 is further improved, the reliability and stability of the welding of the sleeve 20 and the valve body 30 are further ensured, and the use of penetration welding is beneficial to improving the convenience of welding and saving welding costs. It can be understood that, in order to avoid material waste of the fixing frame 10, the welding between the fixing frame 10 and the valve body 30 and the sleeve 20 can also not use penetration welding, but can be directly welded and formed. The specific welding method can be selected according to the actual situation, and examples are not given here.

[0051] In the present embodiment, the fixing frame 10 and the sleeve 20 are welded by penetration. In this way, the forming position and the reliability of the first welding area 401 are ensured, and the situation that other welding methods will cause the first welding area 401 to be far away from the third welding area 403 and have poor force dispersion bearing effect or high welding cost is avoided.

[0052] It can be understood that, in order to avoid material waste of the fixing frame 10, the second welding area 402 is located at the end of the fixing frame 10, and at this time, penetration welding can not be used at the second welding area 402, but can be directly welded and formed.

[0053] In the embodiment, the electric valve is an electronic expansion valve, and the electric valve further comprises a valve needle assembly 50, a nut assembly 60, a sealing assembly 70, a rotor assembly 80 and an external pipe 90, the rotor assembly 80 and the nut assembly 60 are arranged in the sleeve 20, one end of the valve needle assembly 50 passes through the nut assembly 60 and the rotor assembly 80 and is threadedly connected with the nut assembly 60, the other end of the valve needle assembly 50 is sealingly arranged in the valve body 30 through the sealing assembly 70, and the valve body 30 is provided with a plurality of flow-through openings, and one external pipe 90 is connected at each flow-through opening.

[0054] It is to be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0055] The relative arrangement of parts and steps, numerical expressions, and numerical values set forth in the examples are not intended to limit the scope of the present application, unless otherwise specifically stated. Also, it is to be understood that the dimensions of the various parts shown in the drawings are not drawn to scale for the sake of convenience in description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered as part of the description of the application. In all examples shown and discussed herein, any specific value is to be interpreted as merely exemplary and not as a limitation. Thus, other examples of the example embodiments can have different values. It is to be noted that like reference numerals and letters refer to like items in the following drawings, and thus, once an item is defined in one drawing, it need not be discussed further in subsequent drawings.

[0056] In the description of the present application, it needs to be understood that the orientation words such as "front, back, up, down, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicated orientation or position relationship are usually based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and in the absence of the opposite description, these orientation words do not indicate and imply that the indicated device or element must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the protection scope of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0057] For purposes of the description hereinafter, spatial relative terms, such as "above", "below", "upper", "lower", and the like, can be used to describe the relative position of one element or feature to another as illustrated in the figures. It will be understood that the spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "up" other elements or features would then be oriented "below" or "down" the other elements or features. Thus, the exemplary term "above" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly. Well, the spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "up" other elements or features would then be oriented "below" or "down" the other elements or features. Thus, the exemplary term "above" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0058] In addition, it needs to be explained that the use of "first", "second" and the like words to limit the parts, only for the convenience of the corresponding parts for the distinction, such as no other declaration, the above words have no special meaning, therefore can not be understood as the restriction of the scope of protection of the utility model.

[0059] The above only describes the preferred embodiments of the present application, and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An electric valve, characterized in that, The electric valve includes a fixed frame (10), a sleeve (20) and a valve body (30) welded together in pairs. The fixed frame (10) is sleeved on the outer periphery of the welding position of the sleeve (20) and the valve body (30). The welding point of the fixing frame (10) and the sleeve (20) forms a first welding area (401), the welding point of the fixing frame (10) and the valve body (30) forms a second welding area (402), and the welding point of the sleeve (20) and the valve body (30) forms a third welding area (403). The first welding area (401), the third welding area (403) and the second welding area (402) are arranged sequentially at intervals along the axial direction of the electric valve, wherein the third welding area (403) is a full-circumference weld extending along the circumference of the electric valve.

2. The electric valve according to claim 1, characterized in that, The distance between the first welding area (401) and the third welding area (403) in the axial direction of the electric valve is greater than 1.2 mm, and / or the distance between the second welding area (402) and the third welding area (403) in the axial direction of the electric valve is greater than 1.2 mm.

3. The electric valve according to claim 1, characterized in that, The first welding area (401) is a full-circumference weld extending along the circumference of the electric valve; Alternatively, the first welding area (401) includes multiple first weld seams extending circumferentially along the electric valve, with the multiple first weld seams arranged sequentially along the circumferential direction of the electric valve.

4. The electric valve according to claim 3, characterized in that, In the case where the first welding area (401) includes multiple first weld seams extending circumferentially along the electric valve, the multiple first weld seams are symmetrically distributed around the axis of the electric valve.

5. The electric valve according to claim 1, characterized in that, The second welding area (402) is a full-circumference weld extending along the circumference of the electric valve; Alternatively, the second welding area (402) includes multiple second welds extending circumferentially along the electric valve, with the multiple second welds arranged sequentially along the circumferential direction of the electric valve.

6. The electric valve according to claim 5, characterized in that, In the case where the second welding area (402) includes multiple second weld seams extending circumferentially along the electric valve, the multiple second weld seams are symmetrically distributed around the axis of the electric valve.

7. The electric valve according to claim 1, characterized in that, The first welding area (401) on the sleeve (20) has a welding penetration depth of 0.3mm to 0.6mm, and / or the second welding area (402) on the valve body (30) has a welding penetration depth of 0.3mm to 0.6mm.

8. The electric valve according to claim 1, characterized in that, The fixing frame (10) is welded to the valve body (30) and the sleeve (20) at the third welding area (403).

9. The electric valve according to claim 1, characterized in that, The fixing frame (10) and the sleeve (20) are welded together.

10. The electric valve according to claim 1, characterized in that, The second welding area (402) is located at the end of the fixing frame (10).

11. The electric valve according to claim 1, characterized in that, The electric valve also includes a valve needle assembly (50), a nut assembly (60), a sealing assembly (70), a rotor assembly (80), and an external connector (90). The rotor assembly (80) and the nut assembly (60) are both disposed within the sleeve (20). One end of the valve needle assembly (50) passes through the nut assembly (60) and the rotor assembly (80) and is threadedly connected to the nut assembly (60). The other end of the valve needle assembly (50) is sealed and installed within the valve body (30) through the sealing assembly (70). The valve body (30) has multiple flow ports, and an external connector (90) is connected to any one of the flow ports.

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