Electric valve

Abstract

An electric valve, comprising a valve body, a valve seat, and a sealing ring. On the basis that the sealing ring is arranged between the valve body and the valve seat for sealing, annular protrusions are provided on the outer wall of the valve body and / or the inner wall of a mounting hole, and the space between the outer wall of the valve body and the inner wall of the mounting hole is sealed by means of the annular protrusions. When the sealing ring is used for a soft seal, at least one hard seal is additionally provided by means of the annular protrusions, thereby enhancing the sealing effect, avoiding leakage of a refrigerant in a valve cavity, and improving safety. In addition, the sealing ring is closer to the valve cavity than the annular protrusions, so that the sealing ring can block all or most of the refrigerant in the valve cavity, thereby preventing leakage of the refrigerant. Even if the refrigerant leaks through the sealing ring and flows to the annular protrusions, the amount of leaked refrigerant is small. The annular protrusions can achieve a good sealing effect against a small amount of refrigerant, thereby avoiding the leakage of the refrigerant.

Description

Electric valve

[0001] The present application claims priority to the patent application No. 2024217243777 filed on July 19, 2024 in the China National Intellectual Property Office and entitled "Electric valve"; the present application claims priority to the patent application No. 2024226037660 filed on October 25, 2024 in the China National Intellectual Property Office and entitled "Electric valve". TECHNICAL FIELD

[0002] The present application relates to the technical field of valves, in particular to an electric valve. BACKGROUND

[0003] In an electric valve such as a solenoid valve, a valve body and a valve seat are connected to each other, and a sealing ring is usually arranged between the valve body and the valve seat for sealing to avoid leakage of refrigerant in the valve seat. However, for use environments with high sealing requirements, such as air conditioners using flammable and explosive environmentally friendly refrigerants, the existing sealing method has poor reliability and has a risk of leakage, which affects safety and cannot meet the use requirements.

[0004] SUMMARY

[0005] The present application provides an electric valve to solve the problem of poor sealing between the valve body and the valve seat of the electric valve in the prior art, which affects safety.

[0006] To solve the above problem, the present application provides an electric valve, comprising: a valve body and a valve seat, the valve seat having a mounting hole and a valve cavity, the valve body being detachably mounted in the mounting hole, the outer wall of the valve body and / or the inner wall of the mounting hole having an annular protrusion, the outer wall of the valve body and the inner wall of the mounting hole being sealingly fitted by the annular protrusion; the outer wall of the valve body and the inner wall of the mounting hole having a fixed connection structure and a sealing ring arranged along the axial direction; wherein the annular protrusion, the sealing ring and the valve cavity are arranged in sequence.

[0007] Further, the valve body comprises a valve cover, which is detachably mounted in the mounting hole, wherein,

[0008] The valve cover has an annular protrusion, and the hardness of the valve cover is greater than the hardness of the valve seat;

[0009] Or the valve seat has an annular protrusion, and the hardness of the valve seat is greater than the hardness of the valve cover.

[0010] Further, the annular protrusions are a plurality of annular protrusions, and the plurality of annular protrusions are distributed in the radial direction and / or the axial direction of the mounting hole.

[0011] Further, the radial cross section of the annular protrusion is a triangle, a rectangle, a trapezoid or an arc.

[0012] Further, the fixed connection structure is a threaded fitting structure, the outer wall of the valve body and the inner wall of the mounting hole have the threaded fitting structure, the annular protrusion is located between the threaded fitting structure and the sealing ring, and the threaded fitting structure exerts a pressing force on the annular protrusion after being tightened.

[0013] Further, the valve body includes a valve cover, the outer wall of the valve cover and / or the inner wall of the mounting hole has the annular protrusion, the valve cover has external threads, the inner wall of the mounting hole has internal threads, the internal threads and the external threads are fitted and constitute the threaded fitting structure.

[0014] Alternatively, the valve body includes a valve cover and a compression ring, the outer wall of the valve cover and / or the inner wall of the mounting hole has the annular protrusion, the compression ring is sleeved on the valve cover and has an interference fit with the valve cover, the compression ring and the valve cover are in axial limiting fit, the compression ring has external threads, the inner wall of the mounting hole has internal threads, the internal threads and the external threads are fitted and constitute the threaded fitting structure, and the compression ring exerts a pressing force on the valve cover after being tightened.

[0015] Further, the sealing ring is located between the peripheral outer wall of the valve body and the inner wall of the mounting hole.

[0016] Further, the valve body includes a first body and a second body connected to each other, the end of the second body extends into the first body and is connected to the first body, and the sealing ring is located on the peripheral outer wall of the first body.

[0017] Further, the outer wall of the valve body and the inner wall of the mounting hole constitute a first stepped fitting structure, and the first stepped fitting structure has the annular protrusion.

[0018] Further, the outer wall of the valve body and the inner wall of the mounting hole further constitute a second stepped fitting structure, the first stepped fitting structure and the second stepped fitting structure are arranged in an axial direction of the mounting hole, and the second stepped fitting structure has the annular protrusion or the second stepped fitting structure has no annular protrusion.

[0019] Further, the first stepped fitting structure includes a first outer stepped surface on the outer wall of the valve body and a first inner stepped surface on the inner wall of the mounting hole, and the second stepped fitting structure includes a second outer stepped surface on the outer wall of the valve body and a second inner stepped surface on the inner wall of the mounting hole.

[0020] In the case where only the first stepped fitting structure includes the annular protrusion, the annular protrusion is located on the first outer stepped surface or on the first inner stepped surface, the first outer stepped surface and the first inner stepped surface are in sealed fit through the annular protrusion, and the second outer stepped surface and the second inner stepped surface are in sealed fit.

[0021] In the case that only the second step cooperation structure comprises the annular protrusion, the annular protrusion is located on the second outer stepped surface or on the second inner stepped surface, the second outer stepped surface and the second inner stepped surface are sealingly cooperated through the annular protrusion, and the first outer stepped surface and the first inner stepped surface are sealingly cooperated.

[0022] In the case that both the first step cooperation structure and the second step cooperation structure comprise the annular protrusion, the first outer stepped surface or the first inner stepped surface has the annular protrusion, the second outer stepped surface or the second inner stepped surface has the annular protrusion, the first outer stepped surface and the first inner stepped surface are sealingly cooperated through the annular protrusion, and the second outer stepped surface and the second inner stepped surface are sealingly cooperated through the annular protrusion.

[0023] Further, the outer wall of the valve body and the inner wall of the mounting hole further have a threaded cooperation structure, the threaded cooperation structure, the first step cooperation structure, the second step cooperation structure, the sealing ring and the valve cavity are sequentially arranged, or the sealing ring, the first step cooperation structure, the second step cooperation structure, the threaded cooperation structure and the valve cavity are sequentially arranged.

[0024] Further, the outer wall of the valve body and the inner wall of the mounting hole further have a threaded cooperation structure, the threaded cooperation structure, the first step cooperation structure, the sealing ring and the valve cavity are sequentially arranged, or the sealing ring, the first step cooperation structure, the second step cooperation structure, the threaded cooperation structure and the valve cavity are sequentially arranged.

[0025] Further, the first outer stepped surface is provided with the annular protrusion, and the first outer stepped surface and the annular protrusion are an integral structure, or the first inner stepped surface is provided with the annular protrusion, and the first inner stepped surface and the annular protrusion are an integral structure.

[0026] Further, the second outer stepped surface is provided with the annular protrusion, and the second outer stepped surface and the annular protrusion are an integral structure, or the second inner stepped surface is provided with the annular protrusion, and the second inner stepped surface and the annular protrusion are an integral structure.

[0027] Further, in the first step cooperation structure and / or in the second step cooperation structure, the annular protrusions are multiple annular protrusions with different diameters, and the multiple annular protrusions are arranged at intervals along the radial direction of the valve body.

[0028] Further, the part of the valve body cooperating with the mounting hole comprises a threaded segment, a first step segment, a second step segment and a sealing segment in sequence along the axial diameter of the valve body, the threaded segment is threadedly connected with the inner wall of the mounting hole, the first step cooperation structure is located between the first step segment and the second step segment, the second step cooperation structure is located between the second step segment and the sealing segment, and the sealing segment is provided with the sealing ring between the inner wall of the mounting hole.

[0029] Further, the sealing section has an annular sealing groove, and the sealing ring is located in the annular sealing groove; or the inner wall of the mounting hole has an annular sealing groove, and the sealing ring is located in the annular sealing groove.

[0030] The technical scheme of the application provides an electric valve, which comprises a valve body, a valve seat and a sealing ring, the valve seat has a mounting hole and a valve cavity, the valve body is detachably mounted in the mounting hole, the outer wall of the valve body and / or the inner wall of the mounting hole has an annular protrusion, and the outer wall of the valve body and the inner wall of the mounting hole are sealingly matched through the annular protrusion; the outer wall of the valve body and the inner wall of the mounting hole have a fixed connection structure and the sealing ring which are arranged at intervals along the axial direction, and the annular protrusion of the valve body is embedded in the valve seat or the annular protrusion of the valve seat is embedded in the valve body during the connection of the valve body and the valve seat through the fixed connection structure; and the annular protrusion, the sealing ring and the valve cavity are sequentially arranged. In the scheme, on the basis of the sealing of the sealing ring arranged between the valve body and the valve seat, the outer wall of the valve body and / or the inner wall of the mounting hole has an annular protrusion, and the outer wall of the valve body and the inner wall of the mounting hole are sealed through the annular protrusion, that is, at least one hard sealing is added through the annular protrusion in the case of soft sealing by the sealing ring, so that the sealing effect is improved, leakage of refrigerant in the valve cavity is avoided, and safety is improved. In the scheme, the sealing ring is closer to the valve cavity than the annular protrusion, so that the sealing ring can block all or most of the refrigerant in the valve cavity to prevent refrigerant leakage. Even if the refrigerant leaks through the sealing ring and flows to the position of the annular protrusion, only a small amount of refrigerant leaks, and the annular protrusion can achieve good sealing effect for the small amount of refrigerant, so that the leakage of refrigerant can be avoided, and therefore, the relative position of the annular protrusion, the sealing ring and the valve cavity is also improved, and the sealing effect of the electric valve is improved. The electric valve can be applied to an environment with high sealing requirement, for example, when the refrigerant is R290 with high flammability, the scheme can avoid leakage and ensure the safety of R290. BRIEF DESCRIPTION OF DRAWINGS

[0031] The drawings accompanying the specification of the present application form a part thereof, serve to provide further understanding of the present application, and together with the specification explain the application. The use of the same reference numbers in different drawings indicates similar or identical components.

[0032] Fig. 1 shows a structural schematic view of an electric valve provided by an embodiment of the present application;

[0033] Fig. 2 shows a partial enlarged view of Fig. 1;

[0034] Fig. 3 shows a schematic view of a valve cover in Fig. 1;

[0035] Fig. 4 shows a structural schematic view of an electric valve provided by an embodiment of the present application;

[0036] Fig. 5 shows a partial enlarged view of Fig. 4;

[0037] Fig. 6 shows a schematic view of the valve cover in Fig. 4;

[0038] Fig. 7 shows a schematic view of an electric valve according to an embodiment of the present application;

[0039] Fig. 8 shows a partial enlarged view of Fig. 7;

[0040] Fig. 9 shows a partial enlarged view of Fig. 8;

[0041] Fig. 10 shows a partial enlarged view of the valve body in Fig. 7 in a position of cooperation with the valve seat;

[0042] Fig. 11 shows a partial enlarged view of the valve seat in Fig. 7 in a position of cooperation with the valve body.

[0043] Wherein, the above-mentioned figures include the following reference signs: 100, valve body; 150, first body; 160, second body; 170, sealing member; 101, first outer stepped surface; 102, annular protrusion; 103, second outer stepped surface; 104, threaded section; 105, first stage; 106, second stage; 107, sealing section; 108, annular sealing groove; 110, valve cover; 120, valve tube; 130, valve needle assembly; 140, compression ring; 200, valve seat; 201, valve cavity; 202, first inner stepped surface; 203, receiving groove; 204, second inner stepped surface; 205, first interface; 206, second interface; 310, first stepped cooperation structure; 320, second stepped cooperation structure; 330, threaded cooperation structure; 340, sealing ring. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to 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 following description of at least one exemplary embodiment is actually only illustrative, but not as 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 of ordinary skill in the art without making any creative effort fall within the scope of protection of the present application.

[0045] As shown in FIG. 1, the embodiment one of the present application provides an electric valve, comprising a valve body 100, a valve seat 200 and a sealing ring 340, the valve seat 200 has a mounting hole and a valve cavity 201, the valve body 100 is detachably mounted in the mounting hole, the outer wall of the valve body 100 and / or the inner wall of the mounting hole has an annular protrusion 102, the outer wall of the valve body 100 and the inner wall of the mounting hole are sealingly matched through the annular protrusion 102; the outer wall of the valve body 100 and the inner wall of the mounting hole have a fixed connection structure and the sealing ring 340 which are arranged at intervals along the axial direction; wherein the annular protrusion 102, the sealing ring 340 and the valve cavity 201 are sequentially arranged.

[0046] In the scheme, on the basis of the sealing ring 340 arranged between the valve body 100 and the valve seat 200 for sealing, the outer wall of the valve body 100 and / or the inner wall of the mounting hole has the annular protrusion 102, the outer wall of the valve body 100 and the inner wall of the mounting hole are sealed through the annular protrusion 102, that is, at least one hard sealing is added through the annular protrusion 102 in the case of soft sealing by the sealing ring 340, so as to strengthen the sealing effect, avoid the leakage of refrigerant in the valve cavity 201 and improve the safety. In the process of connecting the valve body 100 and the valve seat 200 through the fixed connection structure, the pressure is applied to the annular protrusion 102, so that the annular protrusion 102 of the valve body 100 is embedded into the valve seat 200, or the annular protrusion 102 of the valve seat 200 is embedded into the valve body 100. In addition, the sealing performance between the valve body 100 and the valve seat 200 can also be enhanced by the way of extrusion deformation of the annular protrusion 102. It is preferred that the sealing performance between the valve body 100 and the valve seat 200 is enhanced by the way of embedding the annular protrusion 102.

[0047] Wherein, the outer wall of the valve body 100 can have the annular protrusion 102, that is, the annular protrusion 102 is part of the outer wall of the valve body 100; the inner wall of the mounting hole can have the annular protrusion 102, that is, the annular protrusion 102 is part of the inner wall of the mounting hole; or the annular protrusion 102 can be arranged on the outer wall of the valve body 100 and the inner wall of the mounting hole respectively.

[0048] And, in the present scheme, the sealing ring 340 is closer to the valve cavity 201 relative to the annular protrusion 102, so that the sealing ring 340 can block all or most of the refrigerant in the valve cavity 201, preventing refrigerant leakage. Even if the refrigerant leaks through the sealing ring 340 to the location of the annular protrusion 102, only a small amount of refrigerant will leak, and the annular protrusion 102 can effectively seal the small amount of refrigerant, thereby preventing refrigerant leakage. Therefore, the relative position of the annular protrusion 102, the sealing ring 340, and the valve cavity 201 in the present scheme also improves the sealing effect of the electric valve. Such an electric valve can be used in environments with high sealing requirements, such as when the refrigerant is highly flammable R290. The present scheme can prevent leakage and ensure the safety of R290 use.

[0049] In one embodiment, the valve body 100 includes a valve cover 110 that is detachably mounted to the mounting hole. In one embodiment, the valve cover 110 has an annular protrusion 102, and the hardness of the valve cover 110 is greater than the hardness of the valve seat 200. In other embodiments, the valve seat 200 has an annular protrusion 102, and the hardness of the valve seat 200 is greater than the hardness of the valve cover 110.

[0050] That is, there is a hardness difference between the valve cover 110 and the valve seat 200, and the annular protrusion 102 is located in the structure with greater hardness. In this way, after the valve cover 110 and the valve seat 200 are assembled, the annular protrusion 102 exerts pressure on the structure with smaller hardness that is in contact with it under the action of pressure, causing the structure with smaller hardness to deform at the contact position, thereby increasing the contact area with the annular protrusion 102 and improving the sealing effect after assembly. For example, the valve cover 110 is made of stainless steel, the annular protrusion 102 is located in the valve cover 110, and the valve seat 200 is made of aluminum alloy.

[0051] As shown in FIGS. 2 and 3, the annular protrusion 102 is one. In other embodiments, the annular protrusion 102 can also be provided as multiple, with multiple annular protrusions 102 distributed in the radial and / or axial direction of the mounting hole. Through multiple annular protrusions 102, the sealing effect can be further improved to prevent leakage of the electric valve.

[0052] In one embodiment, the radial cross-section of the annular protrusion 102 can be triangular, rectangular, trapezoidal, or arc-shaped. These different shapes of the annular protrusion 102 can all make full contact with the corresponding surface after assembly, thereby achieving sealing.

[0053] As shown in FIG. 1, the fixed connection structure is a threaded fitting structure 330. The threaded fitting structure 330 is between the outer wall of the valve body 100 and the inner wall of the mounting hole, the annular protrusion 102 is located between the threaded fitting structure 330 and the sealing ring 340, and the threaded fitting structure 330 exerts a pressing force on the annular protrusion 102 after being tightened.

[0054] The threaded connection of the valve body 100 and the valve seat 200 is realized through the threaded structure 330, facilitating disassembly and assembly. During the screwing process, the mating surfaces between the outer wall of the valve body 100 and the inner wall of the mounting hole are pressed against each other by applying sufficient torque, thereby pressing the annular protrusion 102 and realizing the sealing of the position where the annular protrusion 102 is located.

[0055] As shown in FIGS. 1-3, in Embodiment One, the valve body 100 includes a valve cover 110, the outer wall of the valve cover 110 and / or the inner wall of the mounting hole has an annular protrusion 102, the valve cover 110 has external threads, and the inner wall of the mounting hole has internal threads, the internal threads and the external threads cooperate and constitute the threaded structure 330. That is, external threads are provided on the valve cover 110 to realize the connection with the valve seat 200.

[0056] In this scheme, the outer wall of the valve body 100 and the inner wall of the mounting hole constitute the first stepped structure 310, and the first stepped structure 310 has the annular protrusion 102. Through the first stepped structure 310, the valve body 100 and the valve seat 200 can be accurately positioned during assembly. The two mating surfaces of a conventional stepped structure are flat surfaces, and due to machining and assembly errors, the two mating flat surfaces are difficult to fully contact, thus there is a risk of leakage at the position of the stepped structure. In this scheme, the annular protrusion 102 is provided in the first stepped structure 310, so that after the assembly of the two mating flat surfaces, the annular protrusion 102 on one flat surface can fully contact the other flat surface under the action of pressure due to its small width, thereby realizing the reliable sealing of the first stepped structure 310. The sealing ring 340 is located between the peripheral outer wall of the valve body 100 and the inner wall of the mounting hole, and the sealing ring 340 can enhance the firmness of the connection between the valve body 100 and the valve seat 200.

[0057] The valve body 100 includes a first body 150 and a second body 160 connected to each other, the end of the second body 160 extends into the first body 150 and is connected to the first body 150, and the first body 150 and the second body 160 can be fixedly connected by interference or can be welded after interference fit. The sealing ring 340 is located on the peripheral outer wall of the first body 150. The peripheral outer wall herein refers to an annular outer wall surrounding a circle. A sealing element 170 is provided between the outer wall of the second body 160 and the valve seat 200, and the sealing element 170 prevents leakage of the refrigerant from the valve cavity 201 to the outside of the valve seat 200 when the valve port is closed.

[0058] Or, as shown in FIGS. 4 to 6, in the second embodiment, different from the first embodiment, the valve body 100 comprises a valve cover 110 and a compression ring 140, the outer wall of the valve cover 110 and / or the inner wall of the mounting hole has an annular protrusion 102, the compression ring 140 is sleeved on the valve cover 110 and is in interference fit with the valve cover 110, and the compression ring 140 and the valve cover 110 are in axial limiting fit, the compression ring 140 has an external thread, the inner wall of the mounting hole has an internal thread, the internal thread and the external thread are in fit and constitute a threaded fit structure 330, and the compression ring 140 exerts pressure on the valve cover 110 after being tightened. In assembly, the valve cover 110 is subjected to force towards the valve cavity 201 by tightening the compression ring 140, so as to exert pressure on the annular protrusion 102 and press the annular protrusion 102 tightly to realize sealing. The valve cover 110 and the compression ring 140 are assembled into an integral body after interference fit, and the integral body is threadedly connected with the inner wall of the mounting hole through the threaded fit structure 330.

[0059] As shown in FIGS. 7 to 11, different from the above-mentioned embodiments, in the third embodiment, the outer wall of the valve body 100 and the inner wall of the mounting hole further constitute a second stepped fit structure 320, and the first stepped fit structure 310 and the second stepped fit structure 320 are arranged in axial spacing along the mounting hole; wherein the second stepped fit structure 320 has the annular protrusion 102 or the second stepped fit structure 320 is free of the annular protrusion 102.

[0060] In this scheme, the connection position of the valve body 100 and the valve seat 200 is connected through at least two stepped fit structures, and since the annular protrusion 102 is arranged in at least one of the stepped fit structures, the first stepped fit structure 310 and the second stepped fit structure 320 can be ensured to be in sealed fit after assembly through the annular protrusion 102, and the sealing effect is ensured. This scheme realizes sealing through the arrangement of the annular protrusion 102 at the fit position, and thus high machining precision is not required, and machining cost is reduced. The electric valve can be an electromagnetic valve or an electronic expansion valve or the like.

[0061] Among them, since the cross-sectional dimension of the annular protrusion 102 is small, compared with direct sealing with a planar stepped structure, the annular protrusion 102 is easy to contact and realize sealing with the corresponding structure. Moreover, the annular protrusion 102 is easy to deform under force, and after deformation, the annular protrusion 102 is in more sufficient contact with the corresponding structure, and the sealing effect is good.

[0062] Among them, since the cross-sectional dimension of the annular protrusion 102 is small, compared with direct sealing with a planar stepped structure, the annular protrusion 102 is easy to contact and realize sealing with the corresponding structure. Moreover, the annular protrusion 102 is easy to deform under force, and after deformation, the annular protrusion 102 is in more sufficient contact with the corresponding structure, and the sealing effect is good.

[0063] The outer wall of the valve body 100 and the inner wall of the mounting hole further have a threaded fitting structure 330, the threaded fitting structure 330, the first stepped fitting structure 310, the second stepped fitting structure 320, the sealing ring 340, and the valve cavity 201 are sequentially arranged, or the sealing ring 340, the first stepped fitting structure 310, the second stepped fitting structure 320, the threaded fitting structure 330, and the valve cavity 201 are sequentially arranged.

[0064] During the process of screwing or unscrewing, due to machining errors and friction, debris can be generated between the internal thread and the external thread, and external debris can also enter the gap between the internal thread and the external thread. In the prior art, the debris between the internal thread and the external thread can enter the position where the sealing ring 340 is located under the action of gravity or air flow, affecting the sealing effect of the sealing ring 340 and possibly causing leakage.

[0065] In the present scheme, the above two arrangement modes separate the threaded fitting structure 330 and the sealing ring 340, avoiding the debris from the threaded fitting structure 330 entering the position where the sealing ring 340 is located, thereby avoiding the debris affecting the sealing property of the sealing ring 340.

[0066] As shown in FIGS. 8 and 9, the outer wall of the valve body 100 and the inner wall of the mounting hole further have a threaded fitting structure 330, the threaded fitting structure 330, the first stepped fitting structure 310, and the sealing ring 340 are sequentially arranged; the outer wall of the valve body 100 and the inner wall of the mounting hole form a cavity, the cavity is located between the first stepped fitting structure 310 and the threaded fitting structure 330, and the cavity is provided with a receiving groove 203.

[0067] In this way, when the debris in the threaded fitting structure 330 falls, it will enter the receiving groove 203 and be collected through the receiving groove 203, preventing the debris from entering the position of the first stepped fitting structure 310, thereby further preventing the debris from entering the position where the sealing ring 340 is located.

[0068] In one specific embodiment, the threaded fitting structure 330, the first stepped fitting structure 310, the second stepped fitting structure 320, and the sealing ring 340 are sequentially arranged from top to bottom; the outer wall of the valve body 100 has an annular first outer stepped surface 101, the inner wall of the mounting hole has a first inner stepped surface 202 corresponding to the first outer stepped surface 101, the first inner stepped surface 202 has a receiving groove 203 arranged around the first outer stepped surface 101, and the receiving groove 203 is used to receive the debris falling from the threaded fitting structure 330.

[0069] In this way, when the debris in the threaded fitting structure 330 falls under the action of gravity, it will enter the receiving groove 203 and be collected through the receiving groove 203, preventing the debris from entering the position of the first outer stepped surface 101, thereby further preventing the debris from entering the position where the sealing ring 340 is located.

[0070] As shown in FIGS. 8-11, in one embodiment, the outer wall of the valve body 100 has a first annular stepped surface 101, and the first annular stepped surface 101 is provided with an annular protrusion 102, the first annular stepped surface 101 and the annular protrusion 102 are integrated, and the inner wall of the mounting hole has a first inner stepped surface 202 corresponding to the first annular stepped surface 101; during assembly, the first annular stepped surface 101 and the first inner stepped surface 202 extrude and deform the annular protrusion 102 to achieve sealing; the first stepped fitting structure 310 includes the first annular stepped surface 101, the annular protrusion 102, and the first inner stepped surface 202.

[0071] The annular protrusion 102 is a convex structure with a small width and is prone to deformation when extruded, thereby achieving full contact with the first inner stepped surface 202 and reliable sealing; and through the deformation of the annular protrusion 102, the second stepped fitting structure 320 is avoided from having a fitting gap, so that the second stepped fitting structure 320 can also be reliably sealed.

[0072] Alternatively, in other embodiments, the outer wall of the valve body 100 has a first annular stepped surface 101, the inner wall of the mounting hole has a first inner stepped surface 202 corresponding to the first annular stepped surface 101, the first inner stepped surface 202 is provided with an annular protrusion 102, and the first inner stepped surface 202 and the annular protrusion 102 are integrated; during assembly, the first annular stepped surface 101 and the first inner stepped surface 202 extrude and deform the annular protrusion 102 to achieve sealing; the first stepped fitting structure 310 includes the first annular stepped surface 101, the annular protrusion 102, and the first inner stepped surface 202.

[0073] The annular protrusion 102 can be provided in multiple diameters, and the multiple annular protrusions 102 are arranged at intervals along the radial direction of the valve body 100, and the sealing effect can be improved through the multiple annular protrusions 102.

[0074] Further, the outer wall of the valve body 100 has a second annular stepped surface 103, and the inner wall of the mounting hole has a second inner stepped surface 204 corresponding to the second annular stepped surface 103; during assembly, the second annular stepped surface 103 and the second inner stepped surface 204 abut to achieve sealing; the second annular stepped surface 103 and the second inner stepped surface 204 form the second stepped fitting structure 320. Through the abutment of the second annular stepped surface 103 and the second inner stepped surface 204, reliable sealing is ensured.

[0075] As shown in FIG. 10, the part of the valve body 100 matched with the mounting hole includes a threaded segment 104, a first step 105, a second step 106 and a sealing segment 107 in sequence from the axial diameter of the valve body 100, the threaded segment 104 is threadedly connected with the inner wall of the mounting hole, the first step matching structure 310 is located between the first step 105 and the second step 106, the second step matching structure 320 is located between the second step 106 and the sealing segment 107, and the sealing ring 340 is arranged between the sealing segment 107 and the inner wall of the mounting hole.

[0076] By arranging the multi-segment structure, the part of the valve body 100 matched with the mounting hole is easy to process, two step matching structures are formed, and the valve body 100 is conveniently inserted into the valve seat 200.

[0077] The sealing segment 107 has an annular sealing groove 108, and the sealing ring 340 is located in the annular sealing groove 108; or the inner wall of the mounting hole has an annular sealing groove 108, and the sealing ring 340 is located in the annular sealing groove 108.

[0078] As shown in FIG. 7, the valve body 100 includes a valve cover 110, a valve pipe 120 and a valve needle assembly 130, the valve pipe 120 and the valve cover 110 are connected, the valve needle assembly 130 is movably arranged in the valve pipe 120 and the valve cover 110, the valve cover 110 is matched and connected with the mounting hole, one end of the valve cover 110 has a valve port, the side wall of the valve cover 110 has a flow-through port, and the valve needle assembly 130 opens and closes the valve port; the valve seat 200 has a valve cavity 201, a first interface 205 and a second interface 206, the first interface 205, the valve cavity 201 and the flow-through port are sequentially communicated, and the second interface 206 is communicated with the valve port. In the case that the valve port is opened, the first interface 205 and the second interface 206 are communicated, and in the case that the valve port is closed, the first interface 205 and the second interface 206 are disconnected.

[0079] In the above scheme, the connection position of the valve body 100 and the valve seat 200 is connected through at least two step matching structures, and since at least one of the step matching structures is extruded and deformed during assembly, it can be ensured that the first step matching structure 310 and the second step matching structure 320 can be sealingly matched after assembly, thereby ensuring the sealing effect. This scheme realizes sealing through elastic deformation at the matching position, and therefore high processing precision is not required, thereby reducing the processing cost.

[0080] The above only describes optional embodiments of the present scheme and is not used to limit the present scheme. For those skilled in the art, the present scheme can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present scheme shall be included in the protection scope of the present scheme.

Claims

1. An electrically operated valve characterised in that, The utility model relates to a valve body (100) and valve seat (200), valve seat (200) have installation hole and valve cavity (201), the valve body (100) can be detachably installed in installation hole, the outer wall of valve body (100) has annular protrusion (102), or the inner wall of installation hole has annular protrusion (102), or the outer wall of valve body (100) and the inner wall of installation hole have annular protrusion (102), the outer wall of valve body (100) and the inner wall of installation hole are sealed by annular protrusion (102) fit, The outer wall of valve body (100) and the inner wall of installation hole have fixed connection structure and sealing ring (340) arranged axially and spaced apart, Wherein, annular protrusion (102), sealing ring (340) and valve cavity (201) are sequentially arranged. Valve body (100) includes valve cover (110), valve cover (110) can be detachably installed in installation hole, wherein, 2. The motorized valve of claim 1, wherein, Valve cover (110) has annular protrusion (102), and the hardness of valve cover (110) is greater than the hardness of valve seat (200), Or valve seat (200) has annular protrusion (102), and the hardness of valve seat (200) is greater than the hardness of valve cover (110). Annular protrusion (102) is multiple, and multiple annular protrusion (102) is distributed in the radial direction and / or axial direction of installation hole.

3. The motorized valve of claim 1, wherein, The radial section of annular protrusion (102) is triangular, rectangular, trapezoidal or arc-shaped.

4. The motorized valve of claim 1, wherein, Fixed connection structure is screw thread fit structure (330), the outer wall of valve body (100) and the inner wall of installation hole have screw thread fit structure (330), annular protrusion (102) is located between screw thread fit structure (330) and sealing ring (340), screw thread fit structure (330) exerts pressure on annular protrusion (102) after tightening.

5. The motorized valve of claim 1, wherein, Valve body (100) includes valve cover (110), the outer wall of valve cover (110) and / or the inner wall of installation hole has annular protrusion (102), valve cover (110) has outer thread, the inner wall of installation hole has inner thread, the inner thread and the outer thread fit and constitute screw thread fit structure (330).

6. The motorized valve of claim 5, wherein, Valve body (100) includes valve cover (110) and compression ring (140), the outer wall of valve cover (110) and / or the inner wall of installation hole has annular protrusion (102), compression ring (140) is sleeved on valve cover (110) and is in interference fit with valve cover (110), and compression ring (140) and valve cover (110) are in axial limit fit, compression ring (140) has outer thread, the inner wall of installation hole has inner thread, the inner thread and the outer thread fit and constitute screw thread fit structure (330), compression ring (140) exerts pressure on valve cover (110) after tightening.

7. The motorized valve of claim 5, wherein, ​ 8. The motorized valve according to any one of claims 1-7, wherein, The sealing ring (340) is located between the peripheral outer wall of the valve body (100) and the inner wall of the mounting hole.

9. The motorized valve according to any one of claims 1-7, wherein, The valve body (100) comprises a first body (150) and a second body (160) connected with each other, the end of the second body (160) extends into the first body (150) and is connected with the first body (150), and the sealing ring (340) is located on the peripheral outer wall of the first body (150); a sealing element (170) is arranged between the outer wall of the second body (160) and the valve seat (200).

10. The motorized valve of claim 1, wherein, The outer wall of the valve body (100) and the inner wall of the mounting hole constitute a first step matching structure (310), and the first step matching structure (310) has the annular protrusion (102).

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