Structure of a silent gas solenoid valve

Abstract

The present invention discloses a structure of a silent gas solenoid valve, comprising: a moving iron core, a stationary iron core and a conduit; the moving iron core is movably arranged in the conduit; the stationary iron core is arranged in the conduit and partially extends into the moving iron core, the end of the stationary iron core is matched with the moving iron core and there is a gap between the two, a special-shaped ring is arranged between the stationary iron core and the conduit, the special-shaped ring includes a moving iron core section and a sealing section, the moving iron core section faces the moving iron core and can contact the moving iron core, the inner ring of the sealing section is clamped in the stationary iron core, the outer ring of the sealing section contacts the conduit and realizes sealing, and the outer ring of the sealing section is arranged as a pointed structure. This gas solenoid valve structure can provide good buffering, and the solenoid valve operates smoothly and precisely.

Description

Technical Field

[0001] The present invention relates to the technical field of gas valves, and particularly to a structure of a silent gas solenoid valve. Background Art

[0002] Regarding the situation of silent gas solenoid valves, in order to ensure good resilience performance and buffer and noise reduction performance, a rubber material with relatively high requirements is generally used to make the inner plug. For example, the rubber material used is required to have good gas resistance: a material with a relatively low expansion ratio after being soaked in n-pentane; and good high-temperature deformation performance: a material with a lower repeated stress deformation amount after being exposed to high temperature. These materials are relatively expensive, so the market acceptance is relatively low. And when a rubber inner plug is used inside the moving iron core of a silent gas solenoid valve, problems such as being easily pressed crooked or not in place are very likely to occur during the pressing process, resulting in relatively poor performance stability of the gas solenoid valve. Summary of the Invention

[0003] Aiming at the above problems existing in the prior art, the present invention aims to provide a structure of a silent gas solenoid valve that reduces one inner plug, has good buffering, and simplifies the structure and processing technology of the moving iron core.

[0004] The specific technical solutions are as follows:

[0005] A structure of a silent gas solenoid valve mainly includes: a moving iron core, a static iron core, and a conduit;

[0006] The moving iron core is movably arranged inside the conduit;

[0007] The static iron core is arranged inside the conduit and partially extends into the moving iron core. One end of the static iron core matches one end of the moving iron core and there is a gap between them. An irregular-shaped ring is arranged between the static iron core and the conduit. The irregular-shaped ring includes a moving-iron-core section and a sealing section. The moving-iron-core section faces the moving iron core and can contact the moving iron core. The inner ring of the sealing section is clamped inside the static iron core, and the outer ring of the sealing section contacts the conduit and realizes sealing.

[0008] In the above structure of a silent gas solenoid valve, there is also such a feature that the static iron core is provided with a slot for clamping the irregular-shaped ring. The inner ring of the irregular-shaped ring contacts part of the slot wall of the slot and there is a gap between the inner ring and the remaining part of the slot wall of the slot.

[0009] In the above structure of a silent gas solenoid valve, there is also such a feature that the end face of the irregular-shaped ring facing the moving iron core is provided with a ventilation groove.

[0010] In the structure of the above-mentioned silent gas solenoid valve, there is also such a feature that it further includes a bracket and a rubber pad. The conduit is arranged inside the bracket. One end of the moving iron core facing away from the static iron core extends out of the conduit and the bracket and is connected to the rubber pad. One end of the static iron core facing away from the moving iron core is fixed on the bracket.

[0011] In the structure of the above-mentioned silent gas solenoid valve, there is also such a feature that the outer circle of the sealing section is set as a pointed structure.

[0012] In the structure of the above-mentioned silent gas solenoid valve, there is also such a feature that the end of the static iron core is set as a frustum structure. The moving iron core is provided with a frustum-shaped groove adapted to the shape of the end of the static iron core. A preset distance is spaced between the frustum structure and the frustum-shaped groove to form an air gap interval.

[0013] In the structure of the above-mentioned silent gas solenoid valve, there is also such a feature that a reset member is further clamped at the position where the moving iron core is located between the rubber pad and the bracket.

[0014] In the structure of the above-mentioned silent gas solenoid valve, there is also such a feature that a sealing ring is arranged between one end of the bracket facing the rubber pad and the conduit.

[0015] In the structure of the above-mentioned silent gas solenoid valve, there is also such a feature that the bracket is provided with a boss. The sealing ring is located inside the boss. The boss is a cylindrical boss or a frustum-shaped boss.

[0016] In the structure of the above-mentioned silent gas solenoid valve, there is also such a feature that a part of the conduit located inside the bracket is sleeved with an auxiliary disc. A skeleton is further sleeved outside the auxiliary disc. A coil is wound around the skeleton. A protective member is sleeved outside the coil.

[0017] The positive effects of the above technical solutions are:

[0018] For the structure of the silent gas solenoid valve provided by the present invention, by arranging a special-shaped ring between the static iron core and the conduit, the special-shaped ring includes a moving iron core section and a sealing section. The moving iron core section has a relatively high height, which can provide good buffering. The sealing section is used to contact the conduit and achieve sealing, so as to realize the sealing of gas.

[0019] For the structure of the silent gas solenoid valve provided by the present invention, the small height deformation of the moving iron core section makes the voltage inside the valve relatively stable when the valve is closed, and further makes the whole solenoid valve operate smoothly and accurately. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of the structure of the silent gas solenoid valve provided by the first embodiment of the present invention;

[0021] Figure 2 The second structural schematic diagram of the structure of the silent gas solenoid valve provided by the first embodiment of the present invention;

[0022] Figure 3 The structural schematic diagram of the special-shaped ring provided by the present invention;

[0023] Figure 4 The structural schematic diagram of the structure of the silent gas solenoid valve provided by the second embodiment of the present invention;

[0024] Figure 5 The structural schematic diagram of the structure of the silent gas solenoid valve provided by the third embodiment of the present invention;

[0025] Figure 6 The structural schematic diagram of the gas solenoid valve provided by the present invention.

[0026] In the drawings: 1, bracket; 11, accommodating cavity; 12, through hole; 13, boss; 131, planar structure; 132, conical surface structure; 14, first end face; 15, fixing plate; 2, rubber pad; 21, stepped hole; 22, elastic protective layer; 221, threaded part; 222, sealing part; 3, moving iron core; 31, shoulder; 32, frustum-shaped groove; 34, air gap interval; 4, static iron core; 41, frustum-shaped structure; 42, clamping groove; 5, conduit; 6, special-shaped ring; 61, moving iron core section; 611, air permeable groove; 62, sealing section; 7, sealing ring; 8, reset part; 91, auxiliary disc; 911, radial plate; 912, sleeve; 92, skeleton; 921, tubular part; 922, first plate; 923, second plate; 93, coil; 94, protective part; 10, valve body; 16, stepped cavity; 161, first gas cavity; 162, second gas cavity; 17, protrusion. Detailed embodiments

[0027] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0028] The serial numbers assigned to components in this text, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meaning. The terms "connection" and "coupling" as used in this application, unless otherwise specifically stated, both include direct and indirect connection (coupling). In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0029] In the present invention, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0030] Please refer to Figures 1 to 3 , Figure 1 which is the first structural schematic diagram of the structure of the silent gas solenoid valve provided by the first embodiment of the present invention, Figure 2 which is the second structural schematic diagram of the structure of the silent gas solenoid valve provided by the first embodiment of the present invention; Figure 3 which is the structural schematic diagram of the special-shaped ring provided by the present invention. The first embodiment of the present invention discloses a structure of a silent gas solenoid valve, and this structure includes a bracket 1, a rubber pad 2, a moving iron core 3, a static iron core 4, and a conduit 5.

[0031] The bracket 1 is a housing structure and includes a receiving cavity 11. One end of the receiving cavity 11 is sealed by a fixing plate 15, and the other end of the receiving cavity 11 is provided with a through hole 12 communicating with the receiving cavity 11. Among them, the through hole 12 is coaxially arranged with the receiving cavity 11 and is arranged on the side of the receiving cavity 11 facing the rubber pad 2.

[0032] The conduit 5 is arranged inside the bracket 1, the moving iron core 3 is movably arranged inside the conduit 5, and one end extends out of the conduit 5 and the bracket 1 and is connected to the rubber pad 2.

[0033] Specifically, the conduit 5 is arranged inside the receiving cavity 11 and is coaxially arranged with the through hole 12.

[0034] Further, a portion of the catheter 5 located within the stent 1 is sleeved with an auxiliary disc 91. An outer side of the auxiliary disc 91 is further sleeved with a framework 92. A coil 93 is wound around the framework 92, and a cylindrical protective member 94 is sleeved outside the coil 93.

[0035] Specifically, in this embodiment, the framework 92 includes a tubular portion 921, a first plate 922, and a second plate 923. An axis of the tubular portion 921 is collinear with an axis of the catheter 5. The first plate 922 is disposed at one end of the tubular portion 921 close to the rubber pad 2, and the first plate 922 is arranged along a radial direction of the catheter 5. The second plate 923 is disposed at one end of the tubular portion 921 close to the static iron core 4, and the second plate 923 is arranged along the radial direction of the catheter 5.

[0036] There are two auxiliary discs 91, including a radial plate 911 and a sleeve 912. The radial plate 911 of one of the auxiliary discs 91 is clamped between the stent 1 and the first plate 922, and the sleeve 912 is clamped between the tubular portion 921 and the catheter 5. The radial plate 911 of the other auxiliary disc 91 is clamped between the stent 1 and the second plate 923, and the sleeve 912 is clamped between the tubular portion 921 and the catheter 5. A preset distance is provided between the two sleeves 912.

[0037] The coil 93 is connected to an external circuit and generates an electromagnetic force when energized. The electromagnetic force causes the moving iron core 3 to be attracted by the static iron core 4.

[0038] Specifically, the moving iron core 3 is in the shape of a stepped shaft. One end is received within the catheter 5, and the other end first extends out of the catheter 5 and then out of a through hole 12 of the stent 1 and is connected to the rubber pad 2.

[0039] More specifically, a shoulder 31 is provided at an end of the moving iron core 3 away from the stent 1. The rubber pad 2 is provided with a stepped hole 21 matching the shape of the shoulder 31. A diameter of the stepped hole 21 facing the stent 1 is smaller than a diameter away from the stent 1. The shoulder 31 is received within the stepped hole 21 and is fixed within the rubber pad 2 and cannot escape from the rubber pad 2, so that the moving iron core 3 and the rubber pad 2 are fixedly connected together.

[0040] Further, a reset member 8 is clamped at a position of the moving iron core 3 between the rubber pad 2 and the stent 1. The reset member 8 is used for resetting when the rubber pad 2 and the moving iron core 3 are not affected by the electromagnetic force. Optionally, the reset member 8 can be a reset spring.

[0041] Further, a sealing ring 7 is provided between one end of the stent 1 facing the rubber pad 2 and the catheter 5.

[0042] Optionally, in this embodiment, the bracket 1 is provided with a boss 13, the sealing ring 7 is located inside the boss 13, and the boss 13 is a frustoconical boss. Specifically, one end of the boss 13 facing the rubber pad 2 is provided with a plane structure 131, the through hole 12 penetrates the plane structure 131, and the plane structure 131 is connected to the first end surface 14 of the bracket 1 through a conical structure 132.

[0043] The end of the static iron core 4 matches the moving iron core 3 and a gap is provided between the two. Specifically, one end of the static iron core 4 is fixed to the end of the bracket 1 away from the rubber pad 2, and the other end is arranged in the guide tube 5 and partially extends into the moving iron core 3. More specifically, the static iron core 4 is fixed on the fixing plate 15. Specifically, the end of the static iron core 4 is arranged as a frustum-shaped structure 41, and the moving iron core 3 is provided with a frustum-shaped groove 32 adapted to the end shape of the static iron core 4, and the frustum-shaped structure 41 and the frustum-shaped groove 32 are spaced by a preset distance to form an air gap 34. Gas is arranged in the air gap 34, and the moving iron core 3 can move toward the static iron core 4 under the action of electromagnetic force.

[0044] A special-shaped ring 6 is arranged between the static iron core 4 and the guide tube 5 .

[0045] Specifically, the special-shaped ring 6 includes a moving iron core segment 61 and a sealing segment 62 .

[0046] The moving iron core segment 61 faces toward and can contact the moving iron core 3 .

[0047] The outer ring of the sealing section 62 contacts the conduit 5 and achieves sealing. The sealing section 62 is used to achieve sealing of the gas in the air gap 34 to prevent the gas from escaping from the air gap 34. Preferably, in order to prevent the height of the moving iron core section 61 of the special-shaped ring 6 from having too much influence on the voltage when the solenoid valve is closed, the inclination angle of the frustum-shaped groove 32 and the frustum-shaped structure 41 is 5° to 18°. Specifically, the angle of the conical surface part of the frustum-shaped groove 32 and the conical surface part of the frustum-shaped structure 41 is preferably 5° to 18°.

[0048] Preferably, the height of the special-shaped ring 6 can be set to 2-10 mm.

[0049] Further, the end surface of the special-shaped ring 6 facing the moving iron core 3 is provided with a venting groove 611. Optionally, the venting groove 611 runs through the inner ring to the outer ring of the special-shaped ring 6. The venting groove 611 is provided to prevent the special-shaped ring 6 from sucking the moving iron core 3 and causing the situation that it cannot be opened.

[0050] The structure of a silent gas solenoid valve provided in this embodiment is characterized by arranging a special-shaped ring 6 between a static iron core 4 and a conduit 5. The special-shaped ring 6 includes a moving iron core segment 61 and a sealing segment 62. The moving iron core segment 61 is arranged at a relatively high height, which can provide a good buffer. The sealing segment 62 is used to contact with the conduit 5 and achieve sealing, thereby achieving gas sealing.

[0051] When installing the conduit 5, the radial extrusion of the conduit 5 on the sealing section 62 will cause a large change in the height of the moving iron core section 61. To avoid this large change, the outer ring of the sealing section 62 is set as a pointed structure. The small height deformation of the moving iron core section 61 makes the voltage in the solenoid valve stable when the valve is closed, and further makes the whole solenoid valve operate smoothly and accurately.

[0052] The inner ring of the sealing section 62 is clamped inside the static iron core 4.

[0053] Specifically, in order to prevent the offset of the special-shaped ring 6, the static iron core 4 is provided with a clamping groove 42 for clamping the special-shaped ring 6, and the inner ring of the special-shaped ring 6 is clamped inside the clamping groove 42.

[0054] Furthermore, the inner ring of the sealing section 62 contacts with part of the groove wall of the clamping groove 42, and there is a gap between the inner ring of the sealing section 62 and the remaining part of the groove wall of the clamping groove 42. For example, in this embodiment, the cross-section of the clamping groove 42 along the axis direction of the conduit 5 is a polygonal structure, while the inner ring of the sealing section 62 is an arc structure, and there is a gap between the inner ring of the sealing section 62 and part of the groove wall of the clamping groove 42. The structural design that the inner ring of the sealing section 62 contacts with part of the groove wall of the clamping groove 42 and there is a gap between the inner ring of the sealing section 62 and the remaining part of the groove wall of the clamping groove 42 can also achieve an effect similar to that of the pointed structure.

[0055] Please refer to Figure 4 , Figure 4 , which is a schematic structural diagram of the silent gas solenoid valve provided by the second embodiment of the present invention. The structure of the silent gas solenoid valve in this embodiment is basically the same as that of the silent gas solenoid valve in the previous first embodiment, except that the boss 13 in this embodiment is a cylindrical boss. Compared with the previous frustum-shaped boss, the cylindrical boss has higher sealing reliability.

[0056] Please refer to Figure 5 , Figure 5 , which is a schematic structural diagram of the silent gas solenoid valve provided by the third embodiment of the present invention. The structure of the silent gas solenoid valve in this embodiment is basically the same as that of the silent gas solenoid valve in the previous first embodiment, except that the rubber pad 2 in this embodiment is further provided with an elastic protective layer 22. One end of the elastic protective layer 22 is integrally provided with the rubber pad 2, and the other end is sleeved on the moving iron core 3 and fits with the first end face 14 of the bracket 1.

[0057] Optionally, the elastic protective layer 22 includes a threaded part 221 and a sealing part 222. The threaded part 221 is sleeved on the moving iron core 3, and the sealing part 222 is fitted on the first end face 14 of the bracket 1 to prevent external gas from flowing into the internal space of the silent gas solenoid valve structure and eroding the internal components. And this setting can no longer require the sealing ring 7 in the previous embodiments.

[0058] See also Figure 6 , Figure 6 The structure diagram of the gas solenoid valve provided by the present invention. The gas solenoid valve comprises a valve body 10 and the structure of the silent gas solenoid valve in the previous embodiment. The valve body 10 is provided with a stepped cavity 16, which is respectively a first gas cavity 161 and a second gas cavity 162. The diameter of the first gas cavity 161 is smaller than the diameter of the second gas cavity 162. The end of the valve body 10 provided with the second gas cavity 162 is sealed and fitted with the corresponding end of the bracket 1. The rubber pad 2 and the moving iron core 3 are partially located in the second gas cavity 162. The moving iron core 3 can drive the rubber pad 2 to separate from the stepped surface of the stepped cavity 16 under the action of electromagnetic force to realize the connection between the first gas cavity 161 and the second gas cavity 162. At this time, the gas in the second gas cavity 162 can enter the first gas cavity 161 to realize the opening and circulation of the gas.

[0059] Optionally, the rubber pad 2 and the moving iron core 3 can be reset under the action of the reset member 8. After resetting, the rubber pad 2 and the step surface of the step cavity 16 are pressed against each other to separate the first gas cavity 161 from the second gas cavity 162. At this time, the gas in the second gas cavity 162 cannot enter the first gas cavity 161, thereby shutting off the gas.

[0060] Specifically, in this embodiment, in order to achieve better sealing, a protrusion 17 is provided at the step surface between the rubber pad 2 and the step cavity 16. The protrusion 17 is located in the second gas cavity 162. The protrusion 17 abuts against or separates from the end surface of the rubber pad 2, thereby indirectly achieving the abutment or separation between the step surface of the rubber pad 2 and the step cavity 16.

[0061] The gas solenoid valve in this embodiment is provided with a special-shaped ring 6 between the static iron core 4 and the conduit 5. The special-shaped ring 6 includes a moving iron core section 61 and a sealing section 62. The moving iron core section 61 is provided with a relatively high height, which can provide a good buffer. The sealing section 62 is used to contact with the conduit 5 and achieve sealing. On the one hand, the sealing of the gas can be achieved. On the other hand, when the conduit 5 is installed, the compression of the sealing section 62 by the conduit 5 will cause a large change in the height of the moving iron core section 61. This problem can be avoided by providing a pointed structure in this embodiment. The small height deformation of the moving iron core section 61 makes the voltage in the solenoid valve relatively stable when the valve is closed, thereby making the entire solenoid valve run smoothly and accurately. Moreover, the inner ring of the sealing section 62 contacts part of the groove wall of the slot 42, and a gap is left between the inner ring of the sealing section 62 and the rest of the groove wall of the slot 42. This structural design can also achieve an effect similar to that of the pointed structure.

[0062] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments 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.

[0063] The above embodiments only represent several implementation manners of the present invention. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several variations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the appended claims.

Claims

1. A structure of a silent gas solenoid valve, It is characterized in that include: Moving iron core, stationary iron core and conduit; The moving iron core is movably disposed in the conduit; The static iron core is arranged in the conduit and partially extends into the moving iron core, the end of the static iron core matches the moving iron core and a gap is arranged between the two, a special-shaped ring is arranged between the static iron core and the conduit, the special-shaped ring includes a moving iron core section and a sealing section, the moving iron core section faces the moving iron core and can contact the moving iron core, the inner ring of the sealing section is clamped in the static iron core, and the outer ring of the sealing section contacts the conduit and achieves sealing; The static iron core is provided with a slot for clamping the special-shaped ring, the inner ring of the sealing section contacts part of the slot wall of the slot, and a gap is left between the inner ring and the rest of the slot wall of the slot; The cross section of the clamping groove along the axial direction of the catheter is a polygonal structure, and the inner circle of the sealing section is an arc structure, and a gap is left between the inner circle of the sealing section and part of the groove wall of the clamping groove.

2. The structure of the silent gas solenoid valve according to claim 1, It is characterized in that The end surface of the special-shaped ring facing the moving iron core is provided with a ventilation groove.

3. The structure of the silent gas solenoid valve according to any one of claims 1 to 2, It is characterized in that It also includes a bracket and a rubber pad, the conduit is arranged in the bracket, one end of the moving iron core away from the static iron core extends out of the conduit and the bracket and is connected to the rubber pad, and one end of the static iron core away from the moving iron core is fixed on the bracket.

4. The structure of the silent gas solenoid valve according to claim 3, It is characterized in that The outer ring of the sealing section is configured as a pointed structure.

5. The structure of the silent gas solenoid valve according to claim 3, It is characterized in that The end of the static iron core is arranged as a frustum-shaped structure, the moving iron core is arranged with a frustum-shaped groove matching the shape of the end of the static iron core, and a preset distance is provided between the frustum-shaped structure and the frustum-shaped groove to form an air gap.

6. The structure of the silent gas solenoid valve according to claim 3, It is characterized in that A reset piece is also sandwiched between the moving iron core and the bracket.

7. The structure of the silent gas solenoid valve according to claim 3, It is characterized in that A sealing ring is arranged between one end of the bracket facing the rubber pad and the conduit.

8. The structure of the silent gas solenoid valve according to claim 7, It is characterized in that The bracket is provided with a boss, the sealing ring is located inside the boss, and the boss is a cylindrical boss or a frustum-shaped boss.

9. The structure of the silent gas solenoid valve according to claim 3, It is characterized in that The part of the catheter located in the bracket is sheathed with an auxiliary disk, a frame is sheathed outside the auxiliary disk, a coil is wound outside the frame, and a protective piece is sheathed outside the coil.

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