Electromagnetic valve and gas device

Abstract

The utility model relates to the technical field of fuel gas control, and discloses an electromagnetic valve and a fuel gas device, the electromagnetic valve fixedly connects a sealing cap and a valve core into a whole, a valve shaft assembly drives the sealing cap to move through the valve core, the valve shaft assembly directly acts on the valve core instead of the sealing cap, and the sealing cap deforms more easily than the valve core. Compared with a sealing cap, the valve element is not prone to deformation, so that the problem of clamping stagnation in the moving process of the valve element can be avoided, and the smoothness of the valve element in the moving process is improved. In addition, the main medium outlet in the valve body is opened and closed through the sealing cap, the auxiliary medium outlet in the sealing cap is opened and closed through the valve shaft assembly, the electromagnetic valve only uses one sealing cap, the number of the sealing caps is reduced, the structure is simpler, cost is low, and the assembling procedure of the electromagnetic valve is reduced. The valve element of the electromagnetic valve of the gas device is high in smoothness when moving, smooth opening and closing of the electromagnetic valve are facilitated, and timeliness and accuracy of opening and closing of the gas device are improved. The electromagnetic valve is simple in structure and favorable for reducing the cost of a gas device.

Description

Technical Field

[0001] The utility model relates to the technical field of gas control, in particular to a solenoid valve and a gas device. Background Art

[0002] The working principle of the current gas solenoid valve is as follows: the electromagnetic force generated by the electromagnetic coil when it is energized drives the movable valve core to move so that the gas solenoid valve opens; when the electromagnetic coil stops being energized, the spring force provided by the reset spring is used to reset the movable valve core to close the gas solenoid valve, thereby realizing the on-off control of the gas channel.

[0003] However, the above-mentioned gas solenoid valve only has a fully open state and a fully closed state. When the gas solenoid valve is fully open during ignition, it is very easy to cause deflagration. Therefore, the prior art proposes to open the gas solenoid valve with a small opening degree during ignition, and to open the gas solenoid valve with a large opening degree after the ignition is successful, that is, to fully open the gas solenoid valve. Specifically, Figure 1 As shown, the gas solenoid valve comprises a valve body 1', a sealing rubber plug 2', a movable valve core 3', a small spring 4' and a large spring 5'. The valve body 1' is provided with a gas outlet 11' and a large valve port 12' connected to the gas outlet 11'. The sealing rubber plug 2' is provided with a gas through hole 31' whose one end is connected to the gas outlet 11'. The sealing rubber plug 2' is provided with a gas through hole 31' at one end thereof. The other end is connected to a small valve port 22', and the front end of the movable valve core 3' slides through the central hole 21' on the closed rubber plug 2' so that the movable valve core 3' can overcome the resistance of the small spring 4' to open and close the small valve port 22', and the movable valve core 3' can drive the closed rubber plug 2' to move axially, so that the closed rubber plug 2' can overcome the resistance of the small spring 4' and the large spring 5' to open and close the large valve port 12'.

[0004] However, in actual application, it is found that the movable iron core 6' connected to the movable valve core 3' encounters a large resistance when moving, so that the electromagnetic force is not enough to overcome the resistance and move the movable iron core 6', so that the movable iron core 6' is stuck and the movable valve core 3' cannot move normally. Research has found that the reasons for the large resistance encountered by the movable iron core 6' when moving are as follows:

[0005] The front end of the movable valve core 3' slides through the center hole 21' on the closed rubber plug 2'. A plurality of gas through holes 31' are provided, and the plurality of gas through holes 31' are circumferentially surrounding the outside of the center hole 21', so that the strength of the center part of the closed rubber plug 2' is relatively low; and in order to make the closed rubber plug 2' have a good sealing effect, the closed rubber plug 2' generally adopts a rubber structure with a relatively low hardness, which makes the movable valve core 3' act on the closed rubber plug 2' so that when the closed rubber plug 2' opens and closes the large valve port 12', the closed rubber plug 2' is easily subjected to force to cause the center hole 21' to be squeezed and deformed, thereby hindering the movement of the movable iron core 6'.

[0006] Therefore, there is an urgent need for a solenoid valve to solve the above technical problems. Utility Model Content

[0007] The first technical problem solved by the utility model is to provide a solenoid valve, which can improve the smoothness of the valve core movement and reduce the number of sealing caps required for the solenoid valve. It has a simple structure, high sealing performance, a small number of parts, high assembly efficiency and low cost.

[0008] The second technical problem solved by the utility model is to provide a gas device with simple structure, high sealing performance, small number of parts, high assembly efficiency, low cost and small space occupation.

[0009] The first technical problem mentioned above is solved by the following technical solution:

[0010] A solenoid valve comprises a valve body provided with a main medium outlet, and:

[0011] Valve core;

[0012] A sealing cap, wherein the sealing cap is fixedly connected to the valve core to form a medium chamber, the medium chamber is communicated with the inner cavity of the valve body, and a secondary medium outlet communicated with the main medium outlet is provided on the sealing cap or the valve core; the sealing cap is more likely to deform than the valve core;

[0013] A valve shaft assembly, one end of which is confined in the medium chamber, and the other end of which is movably inserted through the valve core along its axial direction, so that the valve shaft assembly can control the connection and disconnection between the auxiliary medium outlet and the medium chamber, and drive the sealing cap to move axially through the valve core so that the sealing cap opens and closes the main medium outlet.

[0014] Compared with the background technology, the solenoid valve of the utility model has the following beneficial effects:

[0015] The solenoid valve of the utility model fixes the sealing cap and the valve core together, and the valve shaft assembly drives the sealing cap to move through the valve core. The valve shaft assembly directly acts on the valve core instead of the sealing cap. Since the sealing cap is more likely to deform than the valve core, and the valve core is less likely to deform than the sealing cap, it can avoid the problem of stagnation when the valve core moves, and improve the smoothness of the movement of the valve core. In addition, the solenoid valve of the utility model uses the sealing cap to open and close the main medium outlet on the valve body, and uses the valve shaft assembly to open and close the secondary medium outlet on the sealing cap. The solenoid valve only uses one sealing cap, which reduces the number of sealing caps, has a simpler structure, is low in cost, and reduces the assembly process of the solenoid valve.

[0016] As a preferred technical solution of the above-mentioned solenoid valve, an open groove is provided at one axial end of the sealing cap, a groove bottom wall of the open groove is provided with a groove, one end of the valve core is fixed in the open groove and abuts against the groove bottom wall of the open groove, the inner wall of the groove and the valve core form the medium chamber, and the auxiliary medium outlet is provided on the groove bottom wall of the groove.

[0017] As a preferred technical solution of the above-mentioned solenoid valve, a medium through hole is opened on the valve core, and the medium through hole connects the inner cavity of the valve body and the medium chamber.

[0018] As a preferred technical solution of the above-mentioned solenoid valve, one of the valve core and the sealing cap is provided with a clamping groove, and the other is provided with a clamping protrusion, and the clamping protrusion is elastically clamped in the clamping groove.

[0019] As a preferred technical solution of the above-mentioned solenoid valve, the valve shaft assembly includes:

[0020] A valve stem, wherein the valve stem is a stepped stem, and a large diameter portion of the valve stem is located in the medium chamber;

[0021] A movable shaft, wherein the small diameter portion of the valve stem is axially movable through the valve core and then fixedly connected to the movable shaft, so that the valve stem can switch between a first position and a second position relative to the sealing cap;

[0022] When the valve stem is located at the first position, the large diameter portion axially abuts against the valve core and the auxiliary medium outlet is connected to the medium chamber; when the valve stem is located at the second position, the large diameter portion is axially spaced from the valve core and the auxiliary medium outlet is cut off from the medium chamber.

[0023] As a preferred technical solution of the above-mentioned solenoid valve, the movable shaft is fixed to the small diameter portion by riveting, threading, or bonding.

[0024] As a preferred technical solution of the above-mentioned solenoid valve, the solenoid valve further includes:

[0025] A secondary elastic reset member, used for applying a force to the valve shaft assembly so that the valve shaft assembly can cut off the secondary medium outlet from the medium chamber;

[0026] The fixed iron core is located between the valve stem and the fixed iron core, and the fixed iron core is connected to the moving shaft through the auxiliary elastic reset member.

[0027] As a preferred technical solution of the above-mentioned solenoid valve, the solenoid valve further includes:

[0028] A coil assembly, wherein the coil assembly is fixedly connected to the fixed iron core and a through hole is provided on the coil assembly;

[0029] A sleeve, one end of which is inserted into the insertion hole and fixedly sleeved on the outside of the fixed iron core, an outer circumferential surface of the sleeve and an inner circumferential surface of the insertion hole are spaced apart, and one end of the movable shaft is axially movably inserted into the sleeve.

[0030] As a preferred technical solution of the above-mentioned solenoid valve, the sleeve is fixed to the fixed iron core by riveting, threading, or bonding.

[0031] The above second technical problem is solved by the following technical solution:

[0032] A gas device comprises the above-mentioned solenoid valve.

[0033] Compared with the background technology, the gas device of the utility model has the following beneficial effects:

[0034] The gas device of the utility model includes the above-mentioned electromagnetic valve, and the valve core of the electromagnetic valve moves smoothly, which is conducive to the smooth opening and closing of the electromagnetic valve, and improves the timeliness and accuracy of the opening and closing of the gas device. In addition, the structure of the electromagnetic valve is simple, which is conducive to reducing the cost of the gas device. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0036] Figure 1 is a cross-sectional view of a solenoid valve in the prior art;

[0037] Figure 2 is a cross-sectional view of a solenoid valve in a closed state provided by an embodiment of the utility model;

[0038] Figure 3 yes Figure 2 A local enlarged schematic diagram of the middle A;

[0039] Figure 4 is a cross-sectional view of a sealing cap provided by an embodiment of the utility model;

[0040] Figure 5 is a cross-sectional view of a valve core provided in an embodiment of the utility model;

[0041] Figure 6 yes Figure 2 A partial enlarged schematic diagram of point B in the middle;

[0042] Figure 7 is a cross-sectional view of a sleeve provided in an embodiment of the utility model;

[0043] Figure 8 is a cross-sectional view of a solenoid valve in an ignition state provided by an embodiment of the utility model;

[0044] Fig. 9 It is a cross-sectional view of a solenoid valve in a fully open state provided by an embodiment of the utility model.

[0045] In the figure:

[0046] 1', valve body; 11', gas outlet; 12', large valve port; 2', sealing rubber plug; 21', center hole; 22', small valve port; 3', movable valve core; 31', gas through hole; 4', small spring; 5', large spring; 6', movable iron core;

[0047] 1. Valve body; 11. Main medium outlet; 12. Medium inlet; 13. Main valve convex part;

[0048] 2. Sealing cap; 21. Auxiliary medium outlet; 22. Opening groove; 23. Groove; 24. Clamping groove; 25. Annular boss; 26. Auxiliary valve convex part;

[0049] 3. Valve core; 31. Medium through hole; 32. Clamping convex part; 33. Limiting part; 34. Center hole; 35. Positioning ring platform; 36. Limiting groove;

[0050] 4. Valve shaft assembly; 41. Valve stem; 411. Large diameter portion; 412. Small diameter portion; 4121. First riveting groove; 42. Moving shaft; 421. Guide groove; 422. First mounting groove; 423. First riveting portion;

[0051] 5. Fixed iron core; 51. Second riveting groove; 52. Guide protrusion; 53. Second mounting groove;

[0052] 6. Main elastic reset member; 7. Secondary elastic reset member;

[0053] 8. sleeve; 81. second riveted portion; 82. flange; 83. annular convex portion;

[0054] 9. Coil assembly; 91. Coil bracket; 92. Conductive coil; 93. Magnetic frame; 94. Through hole; 100. Medium chamber. DETAILED DESCRIPTION

[0055] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0056] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0058] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0059] like Figure 2 and Figure 3 As shown, an embodiment of the utility model provides a solenoid valve, which includes a valve body 1 and a valve core 3, a sealing cap 2 and a valve shaft assembly 4, all of which are arranged in the inner cavity of the valve body 1.

[0060] Among them, the sealing cap 2 is more likely to deform than the valve core 3, and a medium through hole 31 is provided on the valve core 3. The sealing cap 2 is fixedly connected to the valve core 3 and encloses a medium chamber 100. The medium chamber 100 is connected with the inner cavity of the valve body 1 through the medium through hole 31. The sealing cap 2 or the valve core 3 is provided with an auxiliary medium outlet 21 connected with the main medium outlet 11; one end of the valve shaft assembly 4 is limited in the medium chamber 100, and the other end of the valve shaft assembly 4 is movably passed through the valve core 3 along its axial direction, so that the valve shaft assembly 4 can control the connection and disconnection of the auxiliary medium outlet 21 and the medium chamber 100, and drive the sealing cap 2 to move axially through the valve core 3 to open and close the main medium outlet 11.

[0061] The solenoid valve fixedly connects the sealing cap 2 and the valve core 3 as a whole, and the valve shaft assembly 4 drives the sealing cap 2 to move through the valve core 3. The valve shaft assembly 4 directly acts on the valve core 3 instead of the sealing cap 2. Since the sealing cap 2 is more easily deformed than the valve core 3, the valve core 3 is less likely to deform than the sealing cap 2, thereby avoiding the problem of jamming when the valve core 3 moves and improving the smoothness of the movement of the valve core 3.

[0062] In addition, the solenoid valve uses a sealing cap 2 to open and close the main medium outlet 11 on the valve body 1, and uses a valve shaft assembly 4 to open and close the secondary medium outlet 21 on the sealing cap 2. The solenoid valve only uses one sealing cap 2, which reduces the number of sealing caps 2, has a simpler structure, low cost, and reduces the assembly process of the solenoid valve.

[0063] In some embodiments, Figure 3 and Figure 4 As shown, an open groove 22 is provided at one axial end of the sealing cap 2, a groove 23 is provided on the bottom wall of the open groove 22, one end of the valve core 3 is fixed in the open groove 22 and abuts against the bottom wall of the open groove 22, the inner wall of the groove 23 and the valve core 3 form a medium chamber 100, the auxiliary medium outlet 21 is provided on the bottom wall of the groove 23, a medium through hole 31 is provided on the valve core 3, and the medium through hole 31 connects the inner cavity of the valve body 1 with the medium chamber 100.

[0064] The valve body 1 is provided with a medium inlet 12, through which the medium enters the inner cavity of the valve body 1, and the medium in the inner cavity of the valve body 1 enters the medium chamber 100 through the medium through hole 31. When the valve shaft assembly 4 moves axially to open the auxiliary medium outlet 21, the medium in the medium chamber 100 enters the main medium outlet 11 through the auxiliary medium outlet 21, and then flows out from the main medium outlet 11. When the valve shaft assembly 4 drives the sealing cap 2 to move axially through the valve core 3 to open the main medium outlet 11, the medium in the inner cavity of the valve body 1 flows out directly through the main medium outlet 11.

[0065] In other embodiments, the sealing cap 2 can be spaced apart from the bottom wall of the opening groove 22. In this case, the medium through hole 31 can be opened on the valve core 3 or on the circumferential inner wall of the opening groove 22. In this case, the groove 23 can be omitted on the bottom wall of the opening groove 22.

[0066] In some embodiments, Figure 3 and Figure 5 As shown, a center hole 34 is provided on the valve core 3 for passing the valve shaft assembly 4, so that the valve shaft assembly 4 can be coaxially arranged with the valve core 3, ensuring that when the valve shaft assembly 4 drives the sealing cap 2 to move axially through the valve core 3, the valve core 3 will not be deflected by force, so as to avoid the problem of the valve core 3 being stuck in movement.

[0067] There are multiple medium through holes 31, which are arranged at intervals along the circumference of the center hole 34, so that the demand for the amount of medium when the auxiliary medium through hole 31 is opened can be met. Exemplarily, there are three medium through holes 31, which are evenly spaced along the circumference of the center, so that the valve core 3 can be prevented from being deformed due to excessive local force caused by the opening of the medium through holes 31.

[0068] For example, the valve core 3 is made of hard plastic or metal materials such as copper, aluminum or their alloys, so that the valve core 3 has a high hardness and is not easily deformed, and the center hole 34 is processed by fine machining to improve the coaxiality of the valve shaft assembly 4 and the center hole 34, thereby improving the smoothness of the movement of the valve core 3. It should be noted that when the valve core 3 is made of copper-aluminum alloy material, the copper-aluminum alloy material used is an existing material, and the specific composition of the copper-aluminum alloy material will not be introduced here.

[0069] In some embodiments, Figures 3 to 5 As shown, one of the valve core 3 and the sealing cap 2 is provided with a clamping groove 24, and the other is provided with a clamping protrusion 32, and the clamping protrusion 32 is elastically clamped in the clamping groove 24. Exemplarily, an annular boss 25 is convexly provided at the open end of the opening groove 22, and the annular boss 25 faces the side wall of the opening groove 22, the groove bottom wall of the opening groove 22, and the space between the side wall and the groove bottom wall of the opening groove 22 to form the clamping groove 24, and the clamping protrusion 32 is convexly provided on the outer peripheral wall of the valve core 3 and is provided at one axial end of the valve core 3.

[0070] Exemplarily, the sealing cap 2 is a rubber part, and the sealing effect is good when the valve shaft assembly 4 is used to open and close the secondary medium outlet 21 provided on the sealing cap 2, and the sealing cap 2 is used to open and close the main medium outlet 11 provided on the valve body 1. In addition, the clamping protrusion 32 can be inserted into the opening groove 22 through the opening of the opening groove 22, and the clamping protrusion 32 is used to squeeze the annular boss 25 to deform, and the annular boss 25 recovers its deformation when the clamping protrusion 32 passes over the annular boss 25, so that the clamping protrusion 32 is clamped into the clamping groove 24, so that the valve core 3 and the sealing cap 2 are fixedly connected, and the installation is quick and convenient.

[0071] In some embodiments, Figures 3 to 5 As shown, the clamping protrusion 32 has a first side wall and a second side wall that are arranged opposite to each other, the first side wall faces the bottom wall of the groove 23, the second side wall abuts against the annular boss 25, the first side wall and the second side wall are connected by a conical surface, and the diameter of the conical surface gradually increases from the first side wall to the second side wall. In this way, when the clamping protrusion 32 is clamped in the clamping groove 24, the conical surface has a guiding effect, which is conducive to smoothly clamping the clamping protrusion 32 into the clamping groove 24.

[0072] In some embodiments, Figure 3 As shown, the valve shaft assembly 4 includes a valve stem 41 and a movable shaft 42, wherein the valve stem 41 is a stepped stem, and the large diameter portion 411 of the valve stem 41 is located in the medium chamber 100; the small diameter portion 412 of the valve stem 41 is axially movable through the valve core 3 and is fixedly connected to the movable shaft 42, so that the valve stem 41 can switch between the first position and the second position relative to the sealing cap 2; when the valve stem 41 is in the first position, the large diameter portion 411 axially abuts against the valve core 3 and the auxiliary medium outlet 21 is connected to the medium chamber 100; when the valve stem 41 is in the second position, the large diameter portion 411 is axially spaced from the valve core 3 and the auxiliary medium outlet 21 is cut off from the medium chamber 100. The valve stem 41 is a stepped stem, and the outer diameter of the large diameter portion 411 of the valve stem 41 is larger than the inner diameter of the center hole 34, so that the large diameter portion 411 can be limited in the medium chamber 100.

[0073] It should be noted that if Figure 2 As shown, the moving shaft 42 is the movable iron core of the solenoid valve, and the solenoid valve also includes a fixed iron core 5 and a coil assembly 9 fixedly connected to the fixed iron core 5, wherein the moving shaft 42 is located between the valve stem 41 and the fixed iron core 5, and the coil assembly 9 includes a conductive coil 92, a coil bracket 91 and a magnetic frame 93. When the conductive coil 92 is energized, the moving shaft 42 moves axially. This is the prior art in the field and will not be described in detail here.

[0074] Exemplarily, the small diameter portion 412 and the large diameter portion 411 are integrally formed to form the valve stem 41. It should be noted that the small diameter portion 412 and the large diameter portion 411 may also be threadedly connected, or plugged and fixed in the form of interference fit.

[0075] In some embodiments, Figure 3 As shown, the movable shaft 42 is fixed to the small diameter portion 412 by riveting. Specifically, a slot is provided at one end of the movable shaft 42, and a first riveting slot 4121 is provided on the outer peripheral wall of the end of the small diameter portion 412 away from the large diameter portion 411, and a first riveting portion 423 is provided at the open end of the slot, and the end of the small diameter portion 412 away from the large diameter portion 411 is inserted into the slot, and the first riveting portion 423 is riveted and fixed in the first riveting slot 4121. Exemplarily, the first riveting slot 4121 is an annular groove. In other embodiments, the movable shaft 42 and the small diameter portion 412 can also be threadedly connected, or can be fixed by pasting, etc.

[0076] In some embodiments, Figure 2 and Figure 3 As shown, the groove bottom wall of the groove 23 is provided with an auxiliary valve protrusion 26, which is an annular platform, and the annular platform is arranged around the outside of the auxiliary medium outlet 21, and the axial end face of the large diameter portion 411 can abut against the annular platform to cut off the medium chamber 100 and the auxiliary medium outlet 21. When the axial end face of the large diameter portion 411 abuts against the annular platform, the axial end face of the large diameter portion 411 is in linear contact with the annular platform, which can avoid the low machining accuracy of the groove bottom wall of the groove 23, resulting in poor cutting effect of the large diameter portion 411 on the medium chamber 100 and the auxiliary medium outlet 21.

[0077] In some embodiments, Figure 2 and Figure 3 As shown, the opening end surface of the main medium outlet 11 is convexly provided with a main valve convex portion 13, which is an annular platform, and is arranged around the outside of the main medium outlet 11. The sealing cap 2 can abut against the main valve convex portion 13 to cut off the inner cavity of the valve body 1 and the main medium outlet 11. When the sealing cap 2 can abut against the main valve convex portion 13, the sealing cap 2 and the main valve convex portion 13 are in line contact, which can avoid the poor cutting effect of the sealing cap 2 on the inner cavity of the valve body 1 and the main medium outlet 11 due to the low machining accuracy of the inner wall of the valve body 1.

[0078] In some embodiments, Figure 2 and Figure 6 As shown, the solenoid valve further includes an auxiliary elastic reset member 7, which is used to apply force to the valve shaft assembly 4 so that the valve shaft assembly 4 can cut off the auxiliary medium outlet 21 from the medium chamber 100. Exemplarily, the auxiliary elastic reset member 7 is a compression spring.

[0079] In some embodiments, the fixed iron core 5 is connected to the movable shaft 42 through the auxiliary elastic reset member 7. In other words, the auxiliary elastic reset member 7 is disposed between the fixed iron core 5 and the movable shaft 42. Exemplarily, a first mounting groove 422 is provided at one end of the movable shaft 42, a second mounting groove 53 is provided at one end of the fixed iron core 5, one end of the auxiliary elastic reset member 7 is disposed in the first mounting groove 422 and abuts against the bottom wall of the first mounting groove 422, and the other end is disposed in the second mounting groove 53 and abuts against the bottom wall of the second mounting groove 53.

[0080] In some embodiments, Figure 2 and Figure 6 As shown, one of the movable shaft 42 and the fixed iron core 5 is provided with a guide protrusion 52, and the other is provided with a guide groove 421, and the guide protrusion 52 is slidably arranged in the guide groove 421 along the axial direction of the movable shaft 42. During the axial movement of the movable shaft 42, the relative sliding of the guide protrusion 52 and the guide groove 421 prevents the auxiliary elastic reset member 7 from being deflected.

[0081] In some embodiments, Figure 2 , Figure 6 and Figure 7 As shown, the coil assembly 9 is fixedly connected to the fixed iron core 5, and a through hole 94 is provided on the coil assembly 9. The solenoid valve further comprises a sleeve 8, wherein one end of the sleeve 8 is penetrated in the through hole 94 and sleeved and fixed outside the fixed iron core 5, the outer circumference of the sleeve 8 is spaced from the inner circumference of the through hole 94, and one end of the moving shaft 42 is axially movably penetrated in the sleeve 8. Such a configuration enables the assembly of the sleeve 8 to be unaffected by the size and shape of the through hole 94, and the inner circumference of the sleeve 8 is not easily deformed, thereby reducing the sliding resistance between the sleeve 8 and the moving shaft 42 when the moving shaft 42 moves axially.

[0082] In some embodiments, Figure 2 , Figure 6 and Figure 7 As shown, the sleeve 8 is fixed to the fixed core 5 by riveting. Specifically, a second riveting portion 81 is provided at one end of the sleeve 8, and a second riveting groove 51 is provided on the outer peripheral wall of the fixed core 5, and the second riveting portion 81 is riveted and fixed in the second riveting groove 51. Exemplarily, the second riveting groove 51 is an annular groove. In other embodiments, the sleeve 8 and the fixed core 5 can also be threadedly connected, or can be fixed by gluing, etc.

[0083] In some embodiments, the solenoid valve further comprises a main elastic reset member 6, which is used to apply a force to the sealing cap 2 so that the sealing cap 2 can close the main medium outlet 11. Exemplarily, the main elastic reset member 6 is a compression spring.

[0084] In some embodiments, Figure 2 , Figure 3 and Figure 7As shown, the end of the sleeve 8 away from the fixed iron core 5 is turned outward to form a flange 82, and an annular convex portion 83 is convexly provided on the flange 82. The end of the valve core 3 away from the clamping convex portion 32 is convexly provided with a positioning ring pedestal 35. One end of the main elastic reset member 6 abuts against the flange 82 and is sleeved outside the annular convex portion 83, and the other end abuts against the valve core 3 and is sleeved outside the positioning ring pedestal 35. The positioning ring pedestal 35 and the annular convex portion 83 are used to position the main elastic reset member 6 to prevent the main elastic reset member 6 from being deflected during deformation.

[0085] Exemplarily, the side of the flange 82 facing away from the valve core 3 is recessed toward the side where the valve core 3 is located, so that the side of the flange 82 facing the valve core 3 forms the above-mentioned annular protrusion 83, such as by stamping.

[0086] In some embodiments, the flange 82 is clamped between the valve body 1 and the coil assembly 9, and one end of the main elastic reset member 6 abuts against the flange 82 to fix the end of the sleeve 8 away from the fixed iron core 5, thereby fixing both axial ends of the sleeve 8, thereby utilizing the sleeve 8 to guide the axial movement of the moving shaft 42.

[0087] In some embodiments, Figures 3 to 5 As shown, a limiting portion 33 is convexly provided on the outer peripheral wall of one end of the valve core 3 away from the clamping protrusion 32, and the limiting portion 33 and the clamping protrusion 32 are arranged at intervals along the axial direction of the valve core 3, so that a limiting groove 36 is formed between the limiting portion 33 and the clamping protrusion 32, and the annular boss 25 is clamped in the limiting groove 36. Such an arrangement can improve the connection stability between the valve core 3 and the sealing cap 2. Exemplarily, the limiting groove 36 is an annular groove.

[0088] The embodiment of the utility model also provides a gas device, including the above-mentioned solenoid valve, the medium flowing through the solenoid valve is gas, and the solenoid valve is used to control the supply of gas. The gas device can be a gas water heater, a gas stove, or other device that uses gas.

[0089] When the above-mentioned solenoid valve is applied to a gas device, the solenoid valve is a normally closed solenoid valve. Figure 2 As shown, when the conductive coil 92 is de-energized, the valve shaft assembly 4 controls the auxiliary medium outlet 21 and the medium chamber 100 to be cut off under the action of the auxiliary elastic reset member 7, and the sealing cap 2 closes the main medium outlet 11 under the action of the main elastic reset member 6 to cut off the gas supply. At this time, the solenoid valve is in a closed state.

[0090] In some embodiments, the cross-sectional area of ​​the main medium outlet 11 is larger than the cross-sectional area of ​​the secondary medium outlet 21. When the solenoid valve is working, the opening of the solenoid valve can be adjusted by controlling the voltage connected to the conductive coil 92, thereby meeting the regulation requirements of the medium flow.

[0091] When the solenoid valve is used in a gas device, the solenoid valve is opened with a small opening during ignition, and is opened to the maximum opening after the ignition is successful. The state of the solenoid valve being opened with a small opening is recorded as the ignition state, and the state of the solenoid valve being opened to the maximum opening is recorded as the fully open state.

[0092] like Figure 2 and Figure 8 As shown, if the solenoid valve needs to be Figure 2 The closed state shown switches to Figure 8 In the ignition state shown, the conductive coil 92 is connected to a lower voltage, and the movable shaft 42 drives the valve stem 41 to move axially, so that the large diameter portion 411 of the valve stem 41 is away from the auxiliary medium outlet 21, thereby connecting the medium chamber 100 and the auxiliary medium outlet 21, and the gas in the medium chamber 100 enters the main medium outlet 11 through the auxiliary medium outlet 21 and flows out. In this process, the auxiliary elastic reset member 7 is compressed, and the solenoid valve is switched to the ignition state, meeting the demand for small gas flow output when the gas device is ignited.

[0093] like Figure 8 and Fig. 9 As shown, if the solenoid valve needs to be Figure 8 The ignition state shown switches to Fig. 9 In the fully open state shown, the conductive coil 92 is connected to a higher voltage, and the movable shaft 42 drives the valve stem 41 to continue to move axially. After the large diameter portion 411 of the valve stem 41 abuts against the valve core 3, the movable shaft 42 continues to move axially. The large diameter portion 411 of the movable shaft 42 pushes the valve core 3 to drive the sealing cap 2 to move axially, so that the sealing cap 2 is away from the main medium outlet 11, thereby connecting the inner cavity of the valve body 1 with the main medium outlet 11, and the gas in the inner cavity of the valve body 1 flows out through the main medium outlet 11. In this process, the main elastic reset member 6 is compressed, and the auxiliary elastic reset member 7 continues to be compressed, and the solenoid valve switches to the fully open state to meet the demand for large gas flow output.

[0094] like Figure 2 and Fig. 9 As shown, if the solenoid valve needs to be Fig. 9 The fully open state shown switches to Figure 2 In the closed state shown, the conductive coil 92 is de-energized, the main elastic reset member 6 and the auxiliary elastic reset member 7 are gradually reset, and the movable shaft 42 drives the valve stem 41 to move in the opposite direction under the action of the auxiliary elastic reset member 7. At the same time, the valve core 3 pushes the sealing cap 2 to move in the opposite direction under the action of the main elastic reset member 6. The sealing cap 2 closes the main medium outlet 11, and the large diameter portion 411 of the valve stem 41 cuts off the auxiliary medium outlet 21 and the medium chamber 100, and the solenoid valve switches to the closed state.

[0095] In addition, the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A solenoid valve, characterized in that: The invention comprises a valve body (1) provided with a main medium outlet (11), and the following components, all of which are arranged in the inner cavity of the valve body (1): Valve core (3); A sealing cap (2), wherein the sealing cap (2) and the valve core (3) are fixedly connected to form a medium chamber (100), wherein the medium chamber (100) is communicated with the inner cavity of the valve body (1), and a secondary medium outlet (21) communicated with the primary medium outlet (11) is provided on the sealing cap (2) or the valve core (3); the sealing cap (2) is more likely to deform than the valve core (3); A valve shaft assembly (4), one end of the valve shaft assembly (4) is confined in the medium chamber (100), and the other end of the valve shaft assembly (4) is movably extended through the valve core (3) along its axial direction, so that the valve shaft assembly (4) can control the connection and disconnection between the secondary medium outlet (21) and the medium chamber (100), and drive the sealing cap (2) to move axially through the valve core (3) so that the sealing cap (2) opens and closes the main medium outlet (11).

2. The solenoid valve according to claim 1, characterized in that: An open groove (22) is provided at one axial end of the sealing cap (2), a groove bottom wall of the open groove (22) is provided with a groove (23), one end of the valve core (3) is fixed in the open groove (22) and abuts against the groove bottom wall of the open groove (22), the inner wall of the groove (23) and the valve core (3) enclose the medium chamber (100), and the auxiliary medium outlet (21) is provided on the groove bottom wall of the groove (23).

3. The solenoid valve according to claim 2, characterized in that: The valve core (3) is provided with a medium through hole (31), and the medium through hole (31) connects the inner cavity of the valve body (1) and the medium chamber (100).

4. The solenoid valve according to claim 1, characterized in that: One of the valve core (3) and the sealing cap (2) is provided with a clamping groove (24), and the other is provided with a clamping convex portion (32), and the clamping convex portion (32) is elastically clamped in the clamping groove (24).

5. The solenoid valve according to claim 1, characterized in that: The valve shaft assembly (4) comprises: A valve stem (41), wherein the valve stem (41) is a stepped stem, and a large diameter portion (411) of the valve stem (41) is located in the medium chamber (100); A movable shaft (42), wherein the small diameter portion (412) of the valve stem (41) is axially movable and passes through the valve core (3) and is fixedly connected to the movable shaft (42), so that the valve stem (41) can switch between a first position and a second position relative to the sealing cap (2); When the valve stem (41) is located at the first position, the large diameter portion (411) axially abuts against the valve core (3) and the auxiliary medium outlet (21) is connected to the medium chamber (100); when the valve stem (41) is located at the second position, the large diameter portion (411) is axially spaced from the valve core (3) and the auxiliary medium outlet (21) is cut off from the medium chamber (100).

6. The solenoid valve according to claim 5, characterized in that: The movable shaft (42) and the small diameter portion (412) are fixed by riveting, threading, or gluing.

7. The solenoid valve according to claim 5, characterized in that: The solenoid valve further comprises: A secondary elastic reset member (7), used for applying a force to the valve shaft assembly (4) so ​​that the valve shaft assembly (4) can cut off the secondary medium outlet (21) from the medium chamber (100); The fixed iron core (5) and the movable shaft (42) are located between the valve stem (41) and the fixed iron core (5), and the fixed iron core (5) is connected to the movable shaft (42) via the auxiliary elastic reset member (7).

8. The solenoid valve according to claim 7, characterized in that: The solenoid valve further comprises: A coil assembly (9), wherein the coil assembly (9) is fixedly connected to the fixed iron core (5), and a through hole (94) is provided on the coil assembly (9); A sleeve (8), one end of the sleeve (8) is inserted into the insertion hole (94) and is sleeved and fixed outside the fixed iron core (5), the outer circumference of the sleeve (8) is spaced apart from the inner circumference of the insertion hole (94), and one end of the movable shaft (42) is axially movably inserted into the sleeve (8).

9. The solenoid valve according to claim 8, characterized in that: The sleeve (8) is fixed to the fixed iron core (5) by riveting, threading, or gluing.

10. A gas-fired device, characterized in that: A solenoid valve comprising any one of claims 1 to 9.

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