Valve element of liquefied gas pressure reducing valve

Abstract

The utility model discloses a valve core of a liquefied gas pressure reducing valve. The valve core comprises an air inlet valve core, a piston body and a sealing gasket, one end of the air inlet valve element is provided with a sinking groove matched with the sealing gasket, and the piston body is located at the other end of the air inlet valve element through a piston support. The air inlet valve element is provided with an axial air passing hole, and the air passing hole penetrates through the two ends of the air inlet valve element and the sealing gasket. The valve core structure is optimized, the assembly failure rate is reduced, and the product percent of pass is improved.

Description

Technical Field

[0001] The utility model relates to the field of liquefied gas, in particular to a valve core of a liquefied gas pressure reducing valve. Background Art

[0002] The patent with publication number: CN220416347U discloses a valve core structure for a liquefied gas pressure reducing valve, which includes an intake valve core and a piston body; the side wall of the intake valve core is provided with a circumferential sealing ring and the intake valve core is provided with an axial air hole, and the air hole passes through the inner end and the outer end of the intake valve core; the inner end of the intake valve core is provided with a piston bracket extending in the direction of the intake hole, and the piston bracket is provided with a through hole adapted to the piston body; the piston body slides in the through hole, and one end of the piston body is opposite to the air hole.

[0003] The existing liquefied gas pressure reducing valve not only has the function of reducing pressure, but also has the function of explosion-proof. The pressure reducing valve on the market is actually a kind of explosion-proof pressure reducing valve. The above-mentioned valve core structure belongs to the pressure reducing part of the liquefied gas pressure reducing valve, and the explosion-proof part is closely connected with it and made into an integrated structure.

[0004] The above-mentioned explosion-proof part includes a sealing rubber pad and a steel ball. When the air pressure is too high, the steel ball is pushed to block the sealing rubber pad, thereby preventing the liquefied gas from leaking and causing an explosion. Although the existing explosion-proof part is part of the liquefied gas pressure reducing valve, its assembly process is still separate from the pressure reducing structure. The specific assembly process is to manually install the valve core of the pressure reducing valve into the air intake pipe, and then manually install the sealing rubber pad. The valve core and the sealing rubber pad are installed into the air intake pipe in two steps, and each step requires calibration to see if there is an assembly deviation, that is, whether the valve core and the sealing rubber pad are eccentric, whether the assembly is in place, etc. Therefore, there may be assembly problems in the existing valve core assembly and sealing rubber pad assembly, and the step-by-step assembly of the two will further increase the assembly failure rate. Utility Model Content

[0005] Aiming at the defects in the prior art, the valve core structure is optimized, the assembly failure rate is reduced, and the product qualification rate is improved. The utility model provides a liquefied gas pressure reducing valve core, including an intake valve core, a piston body and a sealing gasket; one end of the intake valve core is provided with a sink groove adapted to the sealing gasket, and the piston body is located at the other end of the intake valve core through a piston bracket; the intake valve core is provided with an axial air hole, and the air hole passes through the two ends of the intake valve core and the sealing gasket.

[0006] The beneficial effect of the equipment is that the sealing gasket of the explosion-proof part is assembled with the air intake valve core to form a whole. During the assembly of the pressure reducing valve, the air intake valve core and the sealing gasket can be assembled by only correctly installing the air intake valve core into the air intake hole, simplifying the existing two-step assembly operation into a one-step assembly, thereby reducing the assembly failure rate and improving the product qualification rate.

[0007] Preferably, the side wall of the sealing gasket is sealed with the side wall of the sink. The sealing gasket needs to be sealed with the sink to ensure that the air pressure reduction is in a closed state after the steel ball blocks the air inlet hole of the sealing gasket.

[0008] Preferably, the side of the sealing gasket facing the outside of the sink is provided with a groove adapted to the steel ball. The groove is designed to increase the contact area between the steel ball and the sealing gasket and improve the sealing effect.

[0009] Preferably, the air hole of the sealing gasket is directly opposite to the air hole of the intake valve core, and the air hole of the sealing gasket is located in the middle of the groove.

[0010] Preferably, a plurality of sealing rings are provided on the outside of the intake valve core.

[0011] Preferably, the piston body is provided with a valve pad directly facing the air hole of the intake valve core, and the intake valve core is provided with an intake nozzle corresponding to the valve pad.

[0012] Preferably, the piston body and the piston support are both provided with a notch corresponding to the lever. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0014] Figure 1 It is a structural schematic diagram of this embodiment.

[0015] In the accompanying drawings, there are an intake valve core 1, a piston body 2, a sealing gasket 3, a sink 4, a piston bracket 5, an air hole 6, a groove 7, a valve gasket 8, a sealing ring 9, a notch 10, and an intake nozzle 11. DETAILED DESCRIPTION

[0016] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0017] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field to which the utility model belongs.

[0018] like Figure 1As shown, this embodiment provides a liquefied gas pressure reducing valve core, including an intake valve core 1, a piston body 2 and a sealing gasket 3. One end of the intake valve core 1 is provided with a sink 4 adapted to the sealing gasket 3. Specifically, the sealing gasket 3 is in the shape of a cylinder, and the sink 4 is a circular groove. After the sealing gasket 3 is inserted into the sink 4, the side wall of the sealing gasket 3 is sealed with the side wall of the sink 4. The sealing gasket 3 can also be in other shapes, such as a rectangular body, a conical body, etc., which is not limited in this embodiment. Accordingly, the shape of the sink 4 is adapted to the sealing gasket 3 to maintain sealing.

[0019] The piston body 2 in this embodiment is located at the other end of the intake valve core 1 through the piston bracket 5. The piston bracket 5 is connected to the intake valve core 1, and the piston body 2 can slide axially in the piston bracket 5. The intake valve core 1 is provided with an axial air hole 6, which passes through the two ends of the intake valve core 1 and the sealing gasket 3. The side of the sealing gasket 3 facing the outside of the sink 4 is provided with a groove 7 adapted to the steel ball. The design of the groove 7 is to increase the contact area between the steel ball and the sealing gasket 3 and improve the sealing effect. The side of the sealing gasket 3 needs to be sealed with the sink 4 to ensure that the air pressure reduction is in a closed state after the steel ball blocks the air inlet hole of the sealing gasket 3. In addition, the air hole 6 of the sealing gasket 3 is opposite to the air hole 6 of the intake valve core 1, and the air hole 6 of the sealing gasket 3 is located in the middle of the groove 7. The piston body 2 is provided with a valve pad 8 opposite to the air hole 6 of the intake valve core 1, and the intake valve core 1 is provided with an intake nozzle 11 corresponding to the valve pad 8. The air hole 6 is directly opposite to each other, ensuring that there is no air leakage between the air intake valve core 1 and the sealing gasket 3 .

[0020] In this embodiment, the sealing gasket 3 originally belonging to the explosion-proof part is connected with the air intake valve core 1 of the pressure reducing part to form a whole part. In the process of assembling the pressure reducing valve, the air intake valve core 1 and the sealing gasket 3 can be assembled by only properly installing the air intake valve core 1 into the air intake hole, simplifying the existing two-step assembly operation into a one-step assembly, thereby reducing the assembly failure rate and improving the product qualification rate.

[0021] The structure of the intake valve core 1 is the same as that of the existing intake valve core 1, and a plurality of sealing rings 9 are arranged outside the intake valve core 1, and the number of sealing rings 9 is determined according to the actual situation. The piston body 2 and the piston bracket 5 are both provided with a notch 10 corresponding to the lever, and the rubber diaphragm of the pressure reducing valve is linked to the lever through a connecting rod, and the lever is hinged to the piston body 2 through the notch 10, so that the piston body 2 and the rubber diaphragm are kept in linkage, thereby controlling the air pressure.

[0022] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

Claims

1. A liquefied gas pressure reducing valve core, characterized in that: It includes an intake valve core, a piston body and a sealing gasket; one end of the intake valve core is provided with a recessed groove adapted to the sealing gasket, and the piston body is located at the other end of the intake valve core through a piston bracket; the intake valve core is provided with an axial air hole, which passes through both ends of the intake valve core and the sealing gasket.

2. A liquefied gas pressure reducing valve core according to claim 1, characterized in that: The side wall of the sealing gasket is sealed with the side wall of the sink.

3. The liquefied gas pressure reducing valve core according to claim 1, characterized in that: The side surface of the sealing gasket facing the outside of the sink is provided with a groove adapted to the steel ball.

4. The liquefied gas pressure reducing valve core according to claim 1, characterized in that: The air hole of the sealing gasket is directly opposite to the air hole of the intake valve core, and the air hole of the sealing gasket is located in the middle of the groove.

5. The valve core of a liquefied gas pressure reducing valve according to claim 1, characterized in that: A plurality of sealing rings are arranged outside the intake valve core.

6. The liquefied gas pressure reducing valve core according to claim 1, characterized in that: The piston body is provided with a valve pad which is directly opposite to the air hole of the intake valve core.

7. A liquefied gas pressure reducing valve core according to claim 6, characterized in that: The air intake valve core is provided with an air intake nozzle corresponding to the valve pad.

8. The valve core of a liquefied gas pressure reducing valve according to claim 1, characterized in that: The piston body and the piston support are both provided with a notch corresponding to the lever.

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