Solenoid valves and gas equipment

Abstract

The present invention belongs to the field of valve technology, and specifically discloses a solenoid valve and gas equipment. The solenoid valve includes: a valve stem mechanism, including a main valve stem assembly, an auxiliary valve stem assembly and an auxiliary elastic member, the first end of the main valve stem assembly has a main sealing structure, the first end of the auxiliary valve stem assembly can be inserted into the main valve stem assembly along the axial direction of the valve stem mechanism, and the second end of the auxiliary valve stem assembly extends out of the first end of the main valve stem assembly and has an auxiliary sealing structure; an electromagnetic drive mechanism, which has a first drive state and a second drive state. When the electromagnetic drive mechanism is in the first drive state, the valve stem mechanism as a whole retracts axially relative to the electromagnetic drive mechanism, and the main elastic member and the auxiliary elastic member are compressed. When the electromagnetic drive mechanism is in the second drive state, the auxiliary valve stem assembly extends axially relative to the main valve stem assembly. The gas equipment includes the above-mentioned solenoid valve. The solenoid valve and gas equipment disclosed in the present invention can improve the reliability of the solenoid valve and the flexibility of flow regulation.

Description

Technical Field

[0001] The present invention relates to the field of valve technology, in particular to a solenoid valve and a gas device. Background Art

[0002] A solenoid valve is an electronically controlled component that uses the electromagnetic force generated by an electromagnetic coil to drive the valve stem to move to open or close the valve. It is widely used in various scenarios requiring fluid on-off control, such as gas supply and natural gas transportation, to achieve pipeline channel control.

[0003] Existing gas water heaters, gas wall-mounted boilers, and gas stoves all use solenoid valves to control the on and off of gas. The gas channel of a traditional solenoid valve is fixed, that is, the gas flow rate flowing into the gas channel is fixed. The solenoid valve only has two states: open and closed. When the solenoid valve is open, it is in the maximum flow state. When performing multi-stage control, multiple sets of coils are required to cooperate, resulting in waste of resources and high costs.

[0004] Therefore, there is an urgent need for a solenoid valve and a gas device to solve the above problems. Summary of the Invention

[0005] One of the technical problems solved by the present invention is to provide a solenoid valve that can effectively solve the problem of needing multiple sets of coils to cooperate when performing multi-stage control, resulting in waste of resources and high costs.

[0006] The second technical problem solved by the present invention is to provide a gas device that can effectively solve the problem of high cost when performing multi-stage control.

[0007] The first technical problem mentioned above is solved by the following technical solution:

[0008] Solenoid valve, including:

[0009] A valve stem mechanism, comprising a main valve stem assembly, an auxiliary valve stem assembly, and an auxiliary elastic member, wherein the first end of the main valve stem assembly has a main sealing structure, the first end of the auxiliary valve stem assembly can be inserted into the main valve stem assembly so as to be slidable along the axial direction of the valve stem mechanism, the second end of the auxiliary valve stem assembly extends out of the first end of the main valve stem assembly and has a auxiliary sealing structure, the auxiliary elastic member is disposed in the main valve stem assembly, and both ends of the auxiliary elastic member are fixed relative to the main valve stem assembly and the auxiliary valve stem assembly, respectively;

[0010] A main elastic member is sleeved outside the main valve stem assembly, and a first end of the main elastic member is connected to the main valve stem assembly;

[0011] An electromagnetic drive mechanism comprises a main frame having a central through hole and a coil sleeved on the outside of the main frame, wherein the second end of the main valve stem assembly extends into the central through hole, and the second end of the elastic member abuts against the main frame;

[0012] The electromagnetic drive mechanism has a first drive state and a second drive state. When the electromagnetic drive mechanism is in the first drive state, the valve stem mechanism as a whole retracts along the axial direction relative to the electromagnetic drive mechanism, and the main elastic member and the auxiliary elastic member are compressed. When the electromagnetic drive mechanism is in the second drive state, the auxiliary valve stem assembly extends along the axial direction relative to the main valve stem assembly.

[0013] The solenoid valve described in the present invention has the following beneficial effects compared with the background technology: through the arrangement of the main valve stem assembly, the auxiliary valve stem assembly and the electromagnetic drive mechanism, the solenoid valve has three states: the disconnected state, the first conductive state and the second conductive state, which can not only realize the on-off control of the fluid, but also realize the selection of the first conductive state and the second conductive state by the electromagnetic drive mechanism by controlling the electromagnetic drive mechanism to be in the first drive state or the second drive state, that is, to realize the segmented regulation of the fluid flow and improve the control flexibility of the solenoid valve; at the same time, due to the sliding sleeve of the main valve stem assembly and the auxiliary valve stem assembly, a group of coils can be set to perform multi-stage control, the structure is simple, and the driving cost is low; furthermore, the auxiliary valve stem assembly is slidably inserted in the main valve stem assembly, so that the overall structure of the entire valve stem mechanism is relatively compact and the size is small, which effectively improves the structural compactness of the solenoid valve and is conducive to the miniaturization of the solenoid valve.

[0014] In one embodiment, when the electromagnetic drive mechanism is in the first drive state, a current having a first voltage is passed through the solenoid valve; when the electromagnetic drive mechanism is in the second drive state, a current having a second voltage is passed through the solenoid valve, and the second voltage is less than the first voltage.

[0015] In one embodiment, the main valve stem assembly includes:

[0016] The valve stem body has a first end with a mounting slot and a second end slidably inserted into the central through hole of the electromagnetic drive mechanism;

[0017] a connecting shaft, a first end of which is detachably connected to the valve stem body, and a second end of which extends in a direction away from the valve stem body along the axial direction;

[0018] A main sealing cap is sleeved on the second end of the connecting shaft to form the main sealing structure;

[0019] The auxiliary valve stem assembly slides through the main sealing cap and the connecting shaft, and the first end of the auxiliary valve stem assembly is slidably inserted into the installation slot, and the auxiliary elastic member is arranged in the installation slot.

[0020] In one embodiment, the first end of the connecting shaft extends into the installation slot, and the first end of the auxiliary valve stem assembly is located between the bottom of the installation slot and the first end surface of the connecting shaft.

[0021] In one embodiment, the first end of the connecting shaft is threadedly connected to the groove wall of the installation groove;

[0022] And / or, a sealing ring is provided between the outer wall of the connecting shaft and the inner wall of the mounting slot.

[0023] In one embodiment, the auxiliary valve stem assembly includes:

[0024] an auxiliary valve stem, a first end of which is slidably inserted into the main valve stem assembly and a second end of which extends out of the first end of the main valve stem assembly;

[0025] The auxiliary sealing cap is sleeved on the second end of the auxiliary valve stem, and the auxiliary sealing cap forms the auxiliary sealing structure.

[0026] In one embodiment, the auxiliary valve stem includes a main stem portion and a limiting portion connected to the first end of the main stem portion, a guide sliding hole and a limiting groove portion are provided on the main valve stem assembly, the limiting groove portion is connected to an end of the guide sliding hole away from the main sealing structure, the limiting portion is slidably arranged in the limiting groove portion and is restricted from penetrating into the guide sliding hole, and the main stem portion is slidably penetrated into the guide sliding hole.

[0027] In one embodiment, the primary sealing structure and the secondary sealing structure are coaxially arranged, and the diameter of the primary sealing structure is larger than the diameter of the secondary sealing structure.

[0028] The second technical problem mentioned above is solved by the following technical solution:

[0029] A gas device comprising a valve seat and the solenoid valve as described above, wherein the valve seat has a valve cavity and a fluid inlet, a primary fluid outlet channel, and an auxiliary fluid outlet channel connected to the valve cavity, wherein the auxiliary fluid outlet channel is located inside the primary fluid outlet channel;

[0030] When the electromagnetic drive mechanism is not powered, the primary sealing structure blocks the primary fluid outlet channel, and the secondary sealing structure blocks the secondary fluid outlet channel;

[0031] When the electromagnetic drive mechanism is in the first drive state, the main fluid outlet channel and the fluid outlet channel are both connected to the fluid inlet;

[0032] When the electromagnetic driving mechanism is in the second driving state, the main fluid outlet channel is communicated with the valve cavity, and the auxiliary sealing structure blocks the auxiliary fluid outlet channel.

[0033] Compared to existing technologies, the gas equipment of the present invention offers the following advantages: By employing the aforementioned solenoid valve, it is not only possible to control the gas supply to the gas equipment on and off, but also to adjust the gas flow rate, thereby improving the performance of the gas equipment. Multi-stage control is achieved by simply installing a single coil, resulting in a simple structure and low operating costs.

[0034] In one embodiment, the valve seat is a cylindrical structure with an opening toward the electromagnetic drive mechanism, the fluid inlet is provided on a side wall of the valve seat, and an outflow cavity is provided at the bottom of the valve seat;

[0035] The main communication port is formed at the connection between the outflow chamber and the valve chamber, a main fluid outlet is opened on the side wall of the outflow chamber, the main fluid outlet channel is formed between the main communication port and the main fluid outlet, and the main sealing structure blocks the main communication port;

[0036] A convex column portion is vertically protruded from the bottom of the outflow cavity, and an auxiliary fluid outlet channel is formed through the convex column portion along the axial direction. The auxiliary sealing structure blocks the inner end port of the auxiliary fluid outlet channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 1 is a schematic structural diagram of a solenoid valve provided in an embodiment of the present invention;

[0038] Figure 2 Schematic diagram of the coordination structure between the solenoid valve and the valve seat in the disconnected state provided by an embodiment of the present invention;

[0039] Figure 3 1 is a schematic diagram of the cooperation structure between the solenoid valve provided by an embodiment of the present invention and the valve seat in the first conduction state;

[0040] Figure 4 1 is a schematic diagram of the cooperation structure between the solenoid valve and the valve seat in the second conduction state provided by an embodiment of the present invention;

[0041] Figure 5 1 is a schematic diagram of a valve stem mechanism provided by an embodiment of the present invention;

[0042] Figure 6 1 is a structural diagram of a main valve body provided by an embodiment of the present invention;

[0043] Figure 7 It is a structural schematic diagram of a connecting shaft provided by an embodiment of the present invention.

[0044] Description of labels:

[0045] 100, solenoid valve; 200, valve seat; 201, fluid inlet; 202, primary fluid outlet channel; 203, auxiliary fluid outlet channel; 204, valve chamber; 205, outflow chamber; 206, boss portion; 207, primary sealing ring portion; 208, auxiliary sealing ring portion;

[0046] 1. Main valve stem assembly; 11. Main sealing cap; 111. Mounting hole; 1111. Perforated portion; 1112. Position-limiting hole portion; 1113. Sealing hole portion; 112. Cap body; 113. Connecting end portion; 12. Valve stem body; 121. Mounting slide groove; 1211. Accommodating groove portion; 1212. Position-limiting groove portion; 1213. Mounting groove portion; 13. Connecting shaft; 131. Main shaft portion; 132. Position-limiting shaft portion; 133. Sealing shaft portion; 134. End seal portion; 135. Guide slide hole; 136. Sealing groove; 137. Operating plane; 14. Sealing ring;

[0047] 2. Auxiliary valve stem assembly; 21. Auxiliary valve stem; 211. Stem body; 212. Limiting portion; 22. Auxiliary sealing cap;

[0048] 3. Main elastic member; 4. Auxiliary elastic member; 5. Electromagnetic drive mechanism; 51. Coil; 52. Main frame; 53. Static iron core. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0050] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0051] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0052] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0053] like Figure 1 As shown, this embodiment provides a solenoid valve 100 that can achieve on-off control of a fluid flow channel and regulate fluid flow, thereby enhancing the functionality of the solenoid valve 100 and improving its operational and controllable flexibility. The solenoid valve 100 provided in this embodiment can be used in gas appliances to achieve on-off control and flow regulation of gas supply. It can also be used in other applications requiring fluid on-off control and flow regulation. The application scenarios of the solenoid valve 100 of the present invention are not limited. Gas appliances can include, but are not limited to, gas water heaters, gas wall-mounted boilers, gas stoves, and the like.

[0054] like Figure 2-4 As shown, the solenoid valve 100 provided in this embodiment includes a valve stem mechanism, a main elastic member 3 and an electromagnetic drive mechanism 5. The valve stem mechanism includes a main valve stem assembly 1, an auxiliary valve stem assembly 2 and an auxiliary elastic member 4. The first end of the main valve stem assembly 1 has a main sealing structure, and the first end of the auxiliary valve stem assembly 2 can be inserted into the main valve stem assembly 1 in an axially slidable manner along the valve stem mechanism. The second end of the auxiliary valve stem assembly 2 extends out of the first end of the main valve stem assembly 1 and has an auxiliary sealing structure. The auxiliary elastic member 4 is arranged in the main valve stem assembly 1, and the two ends of the auxiliary elastic member 4 are respectively fixed relative to the main valve stem assembly 1 and the auxiliary valve stem assembly 2; the main elastic member 3 is sleeved on the outside of the main valve stem assembly 1, and the first end of the main elastic member 3 is connected to the main valve stem assembly 1. The electromagnetic drive mechanism 5 includes a main frame 52 with a central through hole and a coil 51 sleeved on the outside of the main frame 52. The second end of the main valve stem assembly 1 extends into the central through hole, and the second end of the main elastic member 3 rests on the main frame 52. The electromagnetic drive mechanism 5 has a first driving state and a second driving state. When the electromagnetic drive mechanism 5 is in the first driving state, the valve stem mechanism as a whole retracts axially relative to the electromagnetic drive mechanism 5, and the main elastic member 3 and the auxiliary elastic member 4 are compressed. When the electromagnetic drive mechanism 5 is in the second driving state, the auxiliary valve stem assembly 2 extends axially relative to the main valve stem assembly 1.

[0055] When in use, the solenoid valve 100 cooperates with a valve seat 200 installed on the application equipment to achieve fluid on-off control and flow regulation. The valve seat 200 is a sleeve-like structure with one end open and the other closed. Its inner cavity forms a valve cavity 204 for fluid flow. Its circumferential sidewalls define a fluid inlet 201 that communicates with the valve cavity 204. The bottom of the valve seat defines a primary fluid outlet channel 202 and a secondary fluid outlet channel 203 that communicate with the valve cavity 204. The primary fluid outlet channel 202 is located inside the secondary fluid outlet channel 203.

[0056] The solenoid valve 100 is fixedly and sealed to the valve seat 200, and one end of the valve stem mechanism, which is provided with a primary sealing structure and an auxiliary sealing structure, extends into the valve cavity 204. The mounting structure of the solenoid valve 100 and the valve seat 200 can be referred to in the prior art and is not the focus of the present invention and will not be described in detail here.

[0057] When the electromagnetic drive mechanism 5 is in an unpowered state, the valve stem mechanism is in an initial state, that is, the solenoid valve 100 is in a disconnected state. At this time, the main sealing structure blocks the main fluid outlet channel 202, and the auxiliary sealing structure blocks the auxiliary fluid outlet channel 203, so that the main fluid outlet channel 202 and the auxiliary fluid outlet channel 203 are not connected to the fluid inlet 201.

[0058] When the electromagnetic drive mechanism 5 is in the first drive state, the valve stem mechanism is in the first state, and the solenoid valve 100 is in the first conduction state. The valve stem mechanism retracts toward the electromagnetic drive mechanism 5 under the action of the electromagnetic drive force of the electromagnetic drive mechanism 5, and the main elastic member 3 and the auxiliary elastic member 4 are both compressed. The main sealing structure moves away from the main fluid outlet channel 202, and the auxiliary sealing structure moves away from the auxiliary fluid outlet channel 203. The main fluid outlet channel 202 and the auxiliary fluid outlet channel 203 are both open, that is, the fluid entering the valve cavity 204 from the fluid inlet 201 can flow out from the main fluid outlet channel 202 and the auxiliary fluid outlet channel 203. The flow rate of the fluid at this time is assumed to be the first flow rate.

[0059] When the electromagnetic drive mechanism 5 is in the second drive state, the solenoid valve 100 is in the second conduction state, the auxiliary valve stem assembly 2 extends relative to the main valve stem assembly 1, and the main valve stem assembly 1 is in a retracted state relative to the electromagnetic drive mechanism 5, that is, the auxiliary valve stem assembly 2 blocks the auxiliary fluid outlet channel 203, and the main valve stem assembly 1 opens the main fluid outlet channel 202. At this time, the fluid flowing into the valve cavity 204 from the fluid inlet 201 can only flow out from the main fluid outlet channel 203. Assume that the flow rate at this time is the second flow rate, and the second flow rate is less than the first flow rate.

[0060] That is, the valve stem mechanism and solenoid valve 100 provided in this embodiment, through the arrangement of the main valve stem assembly 1, the auxiliary valve stem assembly 2 and the electromagnetic drive mechanism 5, enable the solenoid valve 100 to have three states: an off state, a first on state and a second on state. It can not only realize the on-off control of the fluid, but also realize the selection of the first on state and the second on state by the solenoid valve 100 by controlling the electromagnetic drive mechanism 5 to be in the first drive state or the second drive state, that is, realize the segmented regulation of the fluid flow, expand the function of the solenoid valve 100, and improve the control flexibility of the solenoid valve 100; at the same time, multi-stage control can be performed by setting a group of coils 51, the structure is simple, and the driving cost is low; furthermore, the auxiliary valve stem assembly 2 is slidably inserted in the main valve stem assembly 1, so that the overall structure of the entire valve stem mechanism is relatively compact and the size is small, which effectively improves the structural compactness of the solenoid valve 100 and is conducive to the miniaturization of the solenoid valve 100.

[0061] It is understood that in actual applications of the solenoid valve 100, the solenoid valve 100 can be adjusted from the off state to the first on state, and then from the first on state to the second on state. That is, after the solenoid valve 100 is switched from the off state to the fully open state, the flow rate of the solenoid valve can be reduced by adjusting the input voltage of the small solenoid valve 100.

[0062] Specifically, when the solenoid valve 100 is not energized, the solenoid valve 100 is in the disconnected state. When a first voltage is applied to the solenoid valve 100, the electromagnetic drive mechanism 5 is in the first conductive state, and the solenoid valve 100 is in the fully open state, at which point the flow rate is maximum. When a second voltage is applied to the solenoid valve 100, the second voltage is lower than the first voltage. Due to the reduced voltage, the magnetic attraction force exerted by the electromagnetic drive mechanism 5 on the valve stem mechanism decreases. Furthermore, because the auxiliary valve stem assembly 2 partially extends into the main valve stem assembly 1 and is relatively far from the electromagnetic drive mechanism 5, the magnetic attraction force exerted on the auxiliary valve stem assembly 2 is preferentially reduced. That is, the magnetic attraction force exerted on the auxiliary valve stem assembly 2 is smaller than that exerted on the main valve stem assembly 1. Under the elastic restoring force of the auxiliary elastic member 4, the auxiliary valve stem assembly 2 extends and resets relative to the main valve stem assembly 1, thereby blocking the auxiliary fluid outlet passage 205 and causing the electromagnetic drive mechanism 5 to enter the second conductive state. The elastic force of the main elastic member 3 is greater than the elastic force of the auxiliary elastic member 4. When the power supply to the solenoid valve 100 is cut off, or the voltage input into the solenoid valve 100 continues to decrease, the electromagnetic force on the main valve stem assembly 1 decreases or is no longer affected by the electromagnetic force. At this time, the elastic restoring force of the main elastic member 3 is greater than the electromagnetic force received by the main valve stem assembly 1, and the main valve stem assembly 1 resets and closes the main fluid outlet channel 203.

[0063] In other operating states, the solenoid valve 100 can be directly adjusted from the disconnected state to the second conductive state. In this case, a third voltage is applied to the electromagnetic drive mechanism 5. Since the second end of the valve stem mechanism is slidably inserted into the electromagnetic drive mechanism 5, the magnetic attraction of the electromagnetic drive mechanism 5 first directly acts on the main valve stem assembly 1, causing the main valve stem assembly 1 to retract relative to the electromagnetic drive mechanism 5. By controlling the magnitude of the third voltage, the magnetic attraction applied by the electromagnetic drive mechanism 5 to the valve stem mechanism can be controlled so that only the magnetic attraction applied by the electromagnetic drive mechanism 5 to the valve stem mechanism retracts the main valve stem assembly 1, while the auxiliary valve stem assembly 2 remains in a state of blocking the auxiliary fluid outlet channel 203.

[0064] It is understandable that the magnitudes of the first voltage, the second voltage and the second voltage can be specifically set according to the material and quality of the main valve stem assembly 1 and the auxiliary valve stem assembly 2, and the elastic coefficients of the main elastic member 3 and the auxiliary elastic member 4.

[0065] It is understood that the electromagnetic drive mechanism 5 further includes a static iron core 53, which is mounted at one end of the central through hole away from the primary sealing structure and fixed relative to the coil 51. The provision of the static iron core 53 helps further enhance the magnetic field after the coil 51 is energized, thereby increasing the effect on the main valve stem assembly 1 and the auxiliary valve stem assembly 2, so that when the coil 51 is energized, the main valve stem assembly 1 and / or the auxiliary valve stem assembly 2 can move toward the static iron core 53.

[0066] The structural design of the electromagnetic drive mechanism 5 and the principle of the electromagnetic drive mechanism 5 driving the main valve stem assembly 1 and the auxiliary valve stem assembly 2 can refer to the existing technology. This is not the focus of the present invention and will not be repeated here.

[0067] In one embodiment, the bottom of the valve seat 200 has an outflow cavity 205 opening toward the valve cavity 204. The connection between the outflow cavity 205 and the valve cavity 204 forms a primary communication port. A primary fluid outlet is defined on the sidewall of the outflow cavity 205, forming a primary outflow channel 204 between the primary communication port and the primary fluid outlet. A primary sealing structure seals the primary communication port. A boss 206 is axially projecting from the bottom of the outflow cavity 205. An auxiliary fluid outlet channel 205 is axially extending through the boss 206. The inner end of the auxiliary fluid outlet channel 205 forms the auxiliary fluid outlet. The auxiliary fluid outlet is located within the outflow cavity 205, and the auxiliary sealing structure seals the auxiliary fluid outlet. This arrangement effectively ensures that the cross-sectional area of ​​the main fluid outlet is greater than that of the auxiliary fluid outlet. When the main communication port is blocked, fluid cannot flow to the auxiliary fluid outlet, achieving a double-blocking of the auxiliary fluid outlet channel 205 and improving the reliability of the solenoid valve 100 when disconnected.

[0068] A primary sealing ring portion 207 is provided on the open end surface of the main communication port, projecting toward the interior of the valve cavity 204. The primary sealing ring portion 207 surrounds the main communication port. When the primary sealing structure seals the main communication port, the end surface of the primary sealing structure abuts against the primary sealing ring portion 207, deforming the primary sealing ring portion 207 to seal the main communication port.

[0069] An auxiliary sealing ring 208 is protruding from the inner end surface of the boss portion 206 and surrounds the auxiliary fluid outlet. When the primary sealing structure seals the auxiliary fluid outlet, the end surface of the auxiliary sealing structure abuts against the auxiliary sealing ring 208, deforming the auxiliary sealing ring 208 to seal the auxiliary fluid outlet.

[0070] like Figure 4-Figure 6 The main valve stem assembly 1 includes a main valve stem and a main sealing cap 11. The main sealing cap 11 is sleeved onto the first end of the main valve stem. The second end of the main valve stem is slidably inserted into the coil 51 of the electromagnetic drive mechanism 5. The main sealing cap 11 forms the above-mentioned main sealing structure. The main valve stem is made of a metal material, and the main sealing cap 11 is made of an elastic material. By dividing the main valve stem assembly 1 into the main valve stem and the main sealing cap 11, the main valve stem and the main sealing cap 11 can be made of different materials. While ensuring the magnetic attraction force of the electromagnetic drive mechanism 5 on the main valve stem, the main sealing cap 11 can also ensure the sealing performance of the main fluid outlet channel 202.

[0071] The first end of the main valve stem is provided with a mounting slot 121, into which the first end of the auxiliary valve stem assembly 2 is slidably inserted, and the auxiliary elastic member 4 is disposed. The provision of the mounting slot 121 provides installation space and a sliding guide for the sliding installation of the auxiliary valve stem assembly 2, thereby improving the sliding reliability of the auxiliary valve stem assembly 2. At the same time, the provision of the mounting slot 121 also provides space for the installation of the auxiliary elastic member 4, preventing the auxiliary elastic member 4 from falling out.

[0072] The auxiliary elastic member 4 preferably has its first end abutting the bottom of the mounting slot 121 and its second end abutting the first end surface of the auxiliary valve stem assembly 2, to simplify installation of the auxiliary elastic member 4. When the electromagnetic drive mechanism 5 is in the first drive state, the auxiliary elastic member 4 is in a first compressed state. Preferably, when the electromagnetic drive mechanism 5 is in the de-energized state or the second drive state, the auxiliary elastic member 4 is in a second compressed state, causing the auxiliary elastic member 4 to apply a force against the inlet end surface of the auxiliary fluid outlet channel 203 to the auxiliary sealing structure, thereby improving the sealing effect of the auxiliary sealing structure on the auxiliary fluid outlet channel 203. The amount of compression in the second compressed state is less than that in the first compressed state.

[0073] The main valve stem preferably includes a valve stem body 12 and a connecting shaft 13. The first end of the valve stem body 12 defines a mounting slot 121, and the second end is slidably inserted into the coil 51 of the electromagnetic drive mechanism 5. The connecting shaft 13 extends axially, with the first end of the connecting shaft 13 inserted into the mounting slot 121 and removably connected to the valve stem body 12. The second end of the connecting shaft 13 extends out of the mounting slot 121 and is sleeved with the main sealing cap 11. A guide hole 135 is defined through the connecting shaft 13. The auxiliary valve stem assembly 2 slides through the guide hole 135 of the connecting shaft 13, with the first end of the auxiliary valve stem assembly 2 positioned between the bottom of the mounting slot 121 and the end surface of the connecting shaft 13.

[0074] By setting the main valve stem into a separate valve stem body 12 and a connecting shaft 13, the processing of the main valve stem can be simplified, so that the valve stem body 12 can be better designed according to the matching structure with the electromagnetic drive mechanism 5, and the connecting shaft 13 can be better set according to the matching structure with the main sealing cap 11, thereby reducing the processing cost and the maintenance and replacement cost of the main valve stem; at the same time, by setting a detachable connection between the connecting shaft 13 and the valve stem body 12, the first end of the auxiliary valve stem assembly 2 can be better installed in the mounting groove 121, thereby improving the convenience of disassembly and assembly of the main valve stem assembly 1 and the auxiliary valve stem assembly 2, and improving the disassembly and assembly efficiency.

[0075] In one embodiment, the mounting groove 121 includes a receiving groove portion 1211, a limiting groove portion 1212 and a mounting groove portion 1213 which are connected in sequence from the bottom of the groove to the groove mouth and whose groove diameters increase successively. The first end of the auxiliary elastic member 4 is located in the receiving groove portion 1211, the first end of the auxiliary valve stem assembly 2 is slidably limited in the limiting groove portion 1212, and the first end of the connecting shaft 13 is installed in the mounting groove portion 1213.

[0076] The above-mentioned arrangement enables a first step surface to be formed between the accommodating groove portion 1211 and the limiting groove portion 1212, and the first step surface can limit the maximum retraction stroke of the auxiliary valve stem assembly 2 relative to the main valve stem assembly 1; a second step surface is formed between the limiting groove portion 1212 and the installation groove portion 1213, and the first end face of the connecting shaft 13 abuts against the second step surface, so that the second step surface can provide positioning for the installation of the connecting shaft 13, thereby improving the installation reliability and disassembly efficiency of the connecting shaft 13 and the valve stem body 12.

[0077] The connecting shaft 13 is preferably threadedly connected to the groove wall of the installation slot 121 to improve the convenience of assembly and disassembly of the connecting shaft 13 and the valve stem body 12 and the reliability of installation. Specifically, the outer wall of the first end of the connecting shaft 13 is provided with an external thread, and the inner wall of the installation slot portion 1213 is provided with an internal thread, and the internal thread is threadedly engaged with the external thread.

[0078] Preferably, a sealing ring 14 is disposed between the outer wall of the connecting shaft 13 and the inner wall of the mounting groove 1213 to prevent external fluid from entering the interior of the mounting groove 121, thereby improving the operational reliability of the valve stem mechanism. Specifically, a sealing groove 136 is defined on the outer wall of the connecting shaft 13, and the sealing ring 14 is disposed within the sealing groove 136. The sealing groove 136 is preferably located on the side of the external thread away from the main sealing cap 11, thereby forming a two-stage sealing structure between the connecting shaft 13 and the groove wall of the mounting groove 1213: a thread seal and a seal with the sealing ring 14, thereby improving the sealing effect and effectively preventing the sealing ring 14 from loosening.

[0079] In one embodiment, a flat operating surface 137 is cut into the sidewall of the connecting shaft 13. The flat operating surface 137 is located on the side of the external thread of the connecting shaft 13 away from the sealing groove 136. The provision of the flat operating surface 137 facilitates the user to tighten the connecting shaft 13 with a wrench or other tool, thereby improving the efficiency and convenience of assembly and disassembly of the connecting shaft 13.

[0080] In one embodiment, the primary sealing cap 11 includes a cap body 112 and a connecting end 113 coaxially connected to one end of the cap body 112. The outer diameter of the connecting end 113 is smaller than that of the cap body 112. The end face of the cap body 112 facing away from the connecting end 113 forms the primary sealing end face, and the side of the cap body 112 facing the connecting end 113 forms the abutting end face. The primary elastic member 3 is sleeved on the outer side of the connecting end 113, with its first end abutting the abutting end face. The second end of the primary elastic member 3 abuts the end face of the electromagnetic drive mechanism 5.

[0081] To facilitate the fixed connection between the connecting shaft 13 and the main sealing cap 11, the main sealing cap 11 is provided with a mounting hole 111 extending axially therethrough. The mounting hole 111 includes a through-hole portion 1111 and a limiting hole portion 1112 that are connected axially. The aperture of the limiting hole portion 1112 is larger than the aperture of the through-hole portion 1111. The connecting shaft 13 includes a main shaft portion 131 and a limiting shaft portion 132 connected to one end of the main shaft portion 131. The outer diameter of the main shaft portion 131 is smaller than the outer diameter of the limiting shaft portion 132, and the outer diameter of the main shaft portion 131 is adapted to the inner diameter of the through-hole portion 1111, while the outer diameter of the limiting shaft portion 132 is adapted to the aperture of the limiting hole portion 1112. The main shaft portion 131 is inserted into the through-hole portion 1111, and the limiting shaft portion 132 is accommodated in the limiting hole portion 1112. This arrangement can effectively prevent the connecting shaft 13 from falling off the main sealing cap 11 , thereby improving the connection reliability and stability between the connecting shaft 13 and the main sealing cap 11 .

[0082] It can be understood that since the main sealing cap 11 is made of elastic material, during the assembly process of the main sealing cap 11 and the connecting shaft 13, the limiting shaft portion 132 is squeezed into the limiting hole portion 1112 by squeezing the connecting shaft 13 into the mounting hole 111 to increase the deformation of the mounting hole 111, thereby realizing the assembly of the main sealing cap 11 and the connecting shaft 13.

[0083] To facilitate smooth insertion of the limiting shaft portion 132 into the limiting hole portion 1112, a chamfer is provided on the edge of one end of the limiting shaft portion 132 away from the valve stem body 12 to guide the limiting shaft portion 132 as it is inserted into the limiting hole portion 1112. Furthermore, a limiting step surface is formed between the limiting hole portion 1112 and the perforated portion 1111. The limiting step surface mates with the end surface of the limiting shaft portion 132 facing the valve stem body 12, thereby better achieving a seal between the main sealing cap 11 and the connecting shaft 13 and more effectively preventing the limiting shaft portion 132 from slipping out of the limiting hole portion 1112.

[0084] Furthermore, the mounting hole 111 further includes a sealing hole portion 1113 coaxially connected to the limiting hole portion 1112. The sealing hole portion 1113 and the perforated portion 1111 are respectively located on either side of the limiting hole portion 1112 along the axial direction, and the aperture of the sealing hole portion 1113 is smaller than the aperture of the limiting hole portion 1112. The connecting shaft 13 further includes a sealing shaft portion 133 coaxially connected to the limiting shaft portion 132. The sealing shaft portion 133 is located on the side of the limiting shaft portion 132 away from the main shaft portion 131. The sealing shaft portion 133 is inserted into the limiting hole portion 1112 and has an interference fit with the limiting hole portion 1112. Through the interference fit between the sealing hole portion 1113 and the sealing shaft portion 133, sealing can be achieved between the outer wall of the sealing hole portion 1113 and the inner wall of the limiting hole portion 1112, effectively preventing the fluid from flowing in the gap between the connecting shaft 13 and the main sealing cap 11, thereby improving the connection sealing between the main sealing cap 11 and the connecting shaft 13.

[0085] The aperture of the sealing hole 1113 is preferably smaller than the aperture of the perforation 1111 , thereby more effectively preventing the limiting shaft 132 from passing through the main sealing cap 11 through the sealing hole 1113 , thereby improving the connection reliability between the connecting shaft 13 and the main sealing cap 11 .

[0086] In one embodiment, an end seal portion 134 protrudes radially outward at one end of the sealing shaft portion 133 away from the limiting hole portion 1112, and the end seal portion 134 is fitted with the main sealing end face to achieve a connection seal between the end seal portion 134 and the main sealing end face, further improving the sealing performance of the connecting shaft 13 and the main sealing cap 11.

[0087] like Figure 4 and Figure 5As shown, the auxiliary valve stem assembly 2 includes an auxiliary valve stem 21 and an auxiliary sealing cap 22. The first end of the auxiliary valve stem 21 is slidably inserted into the main valve stem assembly 1, and the second end of the auxiliary valve stem 21 is sleeved with the auxiliary sealing cap 22, forming the auxiliary sealing structure described above. The auxiliary valve stem 21 is made of metal, and the auxiliary sealing cap 22 is made of an elastic material. This arrangement allows the auxiliary valve stem 21 and the auxiliary sealing cap 22 to be made of different materials, ensuring the coordination between the auxiliary valve stem assembly 2 and the electromagnetic drive mechanism 5 while ensuring the sealing performance of the auxiliary sealing structure on the auxiliary fluid outlet channel 203.

[0088] The auxiliary valve stem 21 includes a stem body 211 and a stopper 212 connected to the first end of the stem body 211. The second end of the stem body 211 is sleeved with an auxiliary sealing cap 22. The outer diameter of the stem body 211 is smaller than that of the stopper 212. The stem body 211 slides through the guide slide hole 135 of the connecting shaft 13 and has a clearance fit therewith. The stopper 212 slides within the stopper groove 1212. This arrangement not only provides sliding guidance for the auxiliary valve stem 21, but also allows the first end of the auxiliary valve stem 21 to slide within the stopper groove 1212, thereby improving the assembly convenience of the auxiliary valve stem assembly 2 and the main valve stem assembly 1.

[0089] The auxiliary sealing cap 22 is provided with a mounting groove, which includes a first groove portion and a second groove portion arranged along the extension direction of the auxiliary valve stem 21. The groove diameter of the first groove portion is larger than the groove diameter of the second groove portion. An annular groove is provided on the outer peripheral wall of the second end of the rod body 211. The provision of the annular groove forms a neck portion with a smaller outer diameter at the second end of the rod body 211 and an end portion at the end of the rod body 211. The outer diameter of the end portion is adapted to the groove diameter of the first groove portion, and the outer diameter of the neck portion is adapted to the groove diameter of the second groove portion. The end portion is installed in the first groove portion, and the neck portion is installed in the second groove portion. This can effectively prevent the auxiliary valve stem 21 from falling out of the auxiliary sealing cap 22, ensuring the reliability of the connection between the auxiliary valve stem 21 and the auxiliary sealing cap 22.

[0090] In the specific contents of the above-mentioned specific implementation methods, the various technical features can be combined in any non-contradictory manner. In order to make the description concise, not all possible combinations of the above-mentioned technical features are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0091] The specific contents of the above-mentioned specific embodiments merely represent several embodiments of the present invention. While the description is relatively specific and detailed, it should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art may make various modifications and improvements without departing from the scope of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be based on the appended claims.

Claims

1. A solenoid valve for selectively opening and closing a primary fluid outlet channel (202) and an auxiliary fluid outlet channel (203) on a valve seat (200), characterized in that: include: A valve stem mechanism, comprising a main valve stem assembly (1), an auxiliary valve stem assembly (2) and an auxiliary elastic member (4), wherein the first end of the main valve stem assembly (1) has a main sealing structure, and the main sealing structure is used to block the main fluid outlet channel (202); the first end of the auxiliary valve stem assembly (2) can be inserted into the main valve stem assembly (1) in an axially slidable manner along the valve stem mechanism; the second end of the auxiliary valve stem assembly (2) extends out of the first end of the main valve stem assembly (1) and has an auxiliary sealing structure, and the auxiliary sealing structure is used to block the auxiliary fluid outlet channel (203); the auxiliary elastic member (4) is arranged in the main valve stem assembly (1), and the two ends of the auxiliary elastic member (4) are fixed relative to the main valve stem assembly (1) and the auxiliary valve stem assembly (2); A main elastic member (3) is sleeved outside the main valve stem assembly (1), and a first end of the main elastic member (3) is connected to the main valve stem assembly (1); An electromagnetic drive mechanism (5) comprising a main frame (52) having a central through hole and a coil (51) sleeved on the outside of the main frame (52), wherein the second end of the main valve stem assembly (1) extends into the central through hole, and the second end of the main elastic member (3) abuts against the main frame (52); The electromagnetic drive mechanism (5) has a first drive state and a second drive state. When the electromagnetic drive mechanism is in the first drive state, the valve stem mechanism as a whole retracts along the axial direction relative to the electromagnetic drive mechanism (5), and the main elastic member (3) and the auxiliary elastic member (4) are both compressed, so that the main sealing structure opens the main fluid outlet channel (202) and the auxiliary sealing structure opens the auxiliary fluid outlet channel. When the electromagnetic drive mechanism (5) is in the second drive state, the auxiliary valve stem assembly (2) extends along the axial direction relative to the main valve stem assembly (1), so that the main sealing structure opens the main fluid outlet channel (202) and the auxiliary sealing structure blocks the auxiliary fluid outlet channel (203). When the electromagnetic drive mechanism (5) is in the first drive state, a current having a first voltage is passed through the electromagnetic valve; when the electromagnetic drive mechanism (5) is in the second drive state, a current having a second voltage is passed through the electromagnetic valve, and the second voltage is smaller than the first voltage.

2. The solenoid valve according to claim 1, characterized in that The main valve stem assembly (1) comprises: A valve stem body (12) has a first end provided with a mounting slot (121), and a second end slidably inserted into a central through hole of the electromagnetic drive mechanism (5); A connecting shaft (13), a first end of which is detachably connected to the valve stem body (12), and a second end of which extends in a direction away from the valve stem body (12) along the axial direction; A main sealing cap (11) is sleeved on the second end of the connecting shaft (13) and forms the main sealing structure; The auxiliary valve stem assembly (2) slides through the main sealing cap (11) and the connecting shaft (13), and the first end of the auxiliary valve stem assembly (2) is slidably inserted into the installation slot (121), and the auxiliary elastic member (4) is arranged in the installation slot (121).

3. The solenoid valve according to claim 2, characterized in that The first end of the connecting shaft (13) extends into the installation slot (121), and the first end of the auxiliary valve stem assembly (2) is located between the bottom of the installation slot (121) and the first end surface of the connecting shaft (13).

4. The solenoid valve according to claim 3, characterized in that The first end of the connecting shaft (13) is threadedly connected to the groove wall of the mounting sliding groove (121); And / or, a sealing ring (14) is provided between the outer wall of the connecting shaft (13) and the inner wall of the mounting slot (121).

5. The solenoid valve according to claim 1, characterized in that The auxiliary valve stem assembly (2) comprises: An auxiliary valve stem (21), a first end of which is slidably inserted into the main valve stem assembly (1), and a second end of which extends out of the first end of the main valve stem assembly (1); An auxiliary sealing cap (22) is sleeved on the second end of the auxiliary valve stem (21), and the auxiliary sealing cap (22) forms the auxiliary sealing structure.

6. The solenoid valve according to claim 5, characterized in that The auxiliary valve stem (21) includes a main stem portion (211) and a limiting portion (212) connected to the first end of the main stem portion (211); a guide sliding hole (135) and a limiting groove portion (1212) are provided on the main valve stem assembly (1); the limiting groove portion (1212) is connected to an end of the guide sliding hole (135) away from the main sealing structure; the limiting portion (212) is slidably arranged in the limiting groove portion (1212) and is restricted from penetrating into the guide sliding hole (135); and the main stem portion (211) is slidably arranged in the guide sliding hole (135).

7. The solenoid valve according to any one of claims 1 to 6, characterized in that: The main sealing structure and the auxiliary sealing structure are coaxially arranged, and the diameter of the main sealing structure is larger than the diameter of the auxiliary sealing structure.

8. A gas device comprising a valve seat (200), characterized in that Also comprising the solenoid valve according to any one of claims 1 to 7, the valve seat (200) having a valve cavity (204) and a fluid inlet (201), a primary fluid outlet channel (202) and an auxiliary fluid outlet channel (203) communicating with the valve cavity (204), the auxiliary fluid outlet channel (203) being located inside the primary fluid outlet channel (202); When the electromagnetic drive mechanism (5) is not energized, the primary sealing structure blocks the primary fluid outlet channel (202), and the secondary sealing structure blocks the secondary fluid outlet channel (203); When the electromagnetic drive mechanism (5) is in the first drive state, the main fluid outlet channel (202) and the fluid outlet channel (203) are both in communication with the fluid inlet (201); When the electromagnetic drive mechanism (5) is in the second drive state, the main fluid outlet channel (202) is communicated with the valve cavity (204), and the auxiliary sealing structure blocks the auxiliary fluid outlet channel (203).

9. The gas equipment according to claim 8, characterized in that: The valve seat (200) is a cylindrical structure with an opening facing the electromagnetic drive mechanism (5); the fluid inlet (201) is provided on the side wall of the valve seat (200); and an outflow cavity (205) is provided at the bottom of the valve seat (200); The main communication port is formed at the connection point between the outflow cavity (205) and the valve cavity (204); a main fluid outlet is provided on the side wall of the outflow cavity (205); the main fluid outlet channel (202) is formed between the main communication port and the main fluid outlet; and the main sealing structure blocks the main communication port. A convex column portion (206) is vertically protruded from the bottom of the outflow cavity (205), and an auxiliary fluid outlet channel (203) is formed through the convex column portion (206) along the axial direction, and the auxiliary sealing structure blocks the inner end port of the auxiliary fluid outlet channel (203).

Images