CN112923068A

CN112923068A - Valve gate

Info

Publication number: CN112923068A
Application number: CN202110411409.2A
Authority: CN
Inventors: 吴京祥; 王兆峻; 李建雄
Original assignee: Polygon Beijing Energy Technology Co ltd
Current assignee: Polygon Beijing Energy Technology Co ltd
Priority date: 2021-04-16
Filing date: 2021-04-16
Publication date: 2021-06-08

Abstract

The invention discloses a valve, which comprises a valve body, wherein the valve body is provided with a through hole extending along the axial direction, the lower end of the through hole forms a first valve port, the inner wall of the valve body is provided with a second valve port communicated with the through hole, the inner side wall of the valve body is provided with a first sealing surface at the upper side of the second valve port, the valve further comprises a first sealing element fixedly supported on the first sealing surface and a corrugated pipe sealing element arranged at the upper end in the valve body, the corrugated pipe sealing element comprises an inner core and a corrugated pipe sleeved with the inner core, the inner core can move along the axial direction of the valve body to seal or open the first valve port, the axial lower end of the. The invention changes the sealing mode, adopts static sealing, and improves the service life of the sealing element and the sealing reliability.

Description

Valve gate

Technical Field

The invention relates to the technical field of liquefied petroleum gas storage, in particular to a valve.

Background

The liquefied petroleum gas is a combustible substance, when the content in the air reaches a certain concentration range, the liquefied petroleum gas can explode when meeting open fire, and the liquefied petroleum gas valve plays an important role in preventing the leakage of the liquefied petroleum gas.

As shown in fig. 1, the valve of the prior art liquefied petroleum gas cylinder includes a valve body 01, the valve body 01 is axially communicated, a first valve port a is formed at a lower end of the valve body, a second valve port b is formed at a side wall of the valve body 01, the valve further includes a valve body 02 movably installed inside the valve body 01, and a rubber seal ring 03 is arranged between the valve body 02 and an inner cavity of the valve body 01 to realize sealing along the axial direction of the valve body 01.

In the process of opening or closing the valve, namely in the process of up-and-down movement of the valve body 02 along the axis of the valve body 01, the inner side walls of the rubber sealing ring 03 and the valve body 01 can rub against each other, so that the rubber sealing ring 03 is easily abraded, the service life is shortened, and meanwhile, impurities in liquefied gas can be gathered at the position to influence the sealing reliability.

Under the general condition, the life-span of rubber seal 03 only is 5 years, and the design life-span of novel liquefied gas fiber bottle is 12 years, and the unmatched problem of life-span of former valve and the liquefied petroleum gas bottle that newly appears promptly.

Therefore, it is necessary to design a valve with long service life and high sealing reliability.

Disclosure of Invention

The invention aims to provide a valve with long service life and high sealing reliability.

In order to solve the technical problem, the invention provides a valve, which comprises a valve body, wherein the valve body is provided with a through hole extending along the axial direction, the lower end of the through hole forms a first valve port, the inner wall of the valve body is provided with a second valve port communicated with the through hole, the inner side wall of the valve body is provided with a first sealing surface at the upper side of the second valve port, the valve further comprises a first sealing element fixedly supported on the first sealing surface, and a corrugated pipe sealing element arranged at the upper end inside the valve body, the corrugated pipe sealing element comprises an inner core and a corrugated pipe sleeved with the inner core, the inner core can move along the axial direction of the valve body to seal or open the first valve port, the axial lower end of the corrugated pipe is fixedly connected with the inner core, and.

The valve improves the structures of the valve body and the valve body, and particularly, a first sealing surface is additionally arranged at the upper end of a second valve port, and a first sealing piece is fixedly supported on the first sealing surface; meanwhile, the corrugated pipe is additionally arranged on the periphery of the inner core of the corrugated pipe sealing element, and the corrugated pipe is elastic, so that in the process that the inner core moves along the axial direction of the valve body, one fixed end of the corrugated pipe and the inner core can stretch out and draw back along the axial direction along with the movement of the inner core, the other fixed end of the corrugated pipe is always in sealing connection with the first sealing element and is fixedly supported on the first sealing surface to play a role in sealing, and liquefied petroleum gas can only be discharged through the second valve port when the first valve port is opened.

According to the sealing structure, the first sealing element adopts static sealing, so that the sealing is more reliable, and the service life is longer.

Optionally, a gland nut mounted at an opening at the upper end of the valve body is in threaded connection with the valve rod, the lower end of the valve rod is connected with the inner core and can rotate relatively, and the upper end of the valve rod is fixedly connected with the hand wheel.

Optionally, the valve stem peripheral wall is provided with a limiting step for limiting the maximum upward displacement of the inner core.

Optionally, the upper end of the corrugated pipe is provided with a flange edge extending outwards, and the corrugated pipe further comprises an annular pressing member for pressing the flange edge and the first sealing member against the first sealing surface.

Optionally, the inner side wall of the valve body is further provided with a second sealing surface on the lower side of the first sealing surface, a predetermined position of the bottom wall of the inner core is provided with an annular mounting groove, the valve further comprises a second sealing element, the second sealing element is mounted inside the annular mounting groove, the inner core moves along the axial direction of the valve body, and the second sealing element can press or release the second sealing surface to seal or open the first valve port.

Optionally, the material of the first seal and the second seal is polytetrafluoroethylene.

Optionally, the second sealing surface is provided with an annular groove or an annular projection at the location of contact with the second seal.

Optionally, in an axial section of the valve body, the annular groove is in the shape of a pointed angle or an arc.

Optionally, the annular mounting groove bottom wall is further provided with at least one groove.

Drawings

FIG. 1 is a schematic diagram of a prior art valve;

FIG. 2 is a schematic structural view of one embodiment of a valve according to the present invention;

FIG. 3 is a schematic view of a portion of the valve of FIG. 2;

FIG. 4 is a schematic view of a first embodiment of a second sealing surface having an annular groove;

FIG. 5 is a schematic view of a second embodiment of a second sealing surface having an annular groove;

FIG. 6 is a schematic view of a third embodiment of a second sealing surface having an annular groove;

FIG. 7 is a schematic diagram of a first embodiment of a bellows seal in the valve of FIG. 2;

FIG. 8 is a schematic diagram of a second embodiment of a bellows seal in the valve of FIG. 2;

wherein the reference numerals of fig. 1 are explained as follows:

01-a valve body; 02-a valve body; 03-rubber sealing ring; a-a first valve port; b-a second valve port;

wherein the reference numerals of fig. 2 to 8 are explained as follows:

1-a valve body; 2-a first seal; 3-inner core; 4-a bellows; 5-valve stem; 6-hand wheel; 7-pressing a cap nut; 8-a pressing piece; 9-a limit step; 010-a second seal;

i-a first valve port; an O-second valve port; a-an annular groove; b-a groove.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

The terms "first," "second," and the like, herein are used for convenience in describing two or more structures or components that are identical or similar in structure and/or function and do not denote any particular limitation in order and/or importance.

As shown in fig. 2, the present invention provides a valve, which comprises a valve body 1, wherein the valve body 1 is provided with a through hole extending along an axial direction, a first valve port I is formed at the lower end of the through hole, and a second valve port O communicated with the through hole is arranged on the inner wall of the valve body 1;

the inner side wall of the valve body 1 is provided with a first sealing surface at the upper side of the second valve port O, and further comprises a first sealing element 2 fixedly supported on the first sealing surface and a bellows sealing element arranged at the upper end inside the valve body 1, the bellows sealing element comprises an inner core 3 and a bellows 4 sleeved on the inner core 3, the inner core 3 can move along the axial direction of the valve body 1 to seal or open the first valve port I, the axial lower end of the bellows 4 is fixedly connected with the inner core 3, and the upper end of the bellows is connected with the first sealing element 2 in a sealing manner.

The valve improves the structures of a valve body and a valve body, and particularly, a first sealing surface is additionally arranged at the upper end of a second valve port O, and a first sealing element 2 is fixedly supported on the first sealing surface; meanwhile, the bellows 4 is additionally arranged on the periphery of the inner core 3 of the bellows sealing element, and the bellows 4 has elasticity, so that in the process that the inner core 3 moves along the axial direction of the valve body 1, the lower end of the bellows 4 fixed with the inner core 3 can stretch along the axial direction along with the movement of the inner core 3, the upper end of the bellows 4 is always in sealing connection with the first sealing element 2, the bellows is fixedly supported on the first sealing surface, the sealing effect is achieved, and liquefied petroleum gas can only be discharged through the second valve port O when the first valve port I is opened.

As can be seen from the above, the first sealing element 2 adopts static sealing, so that the sealing is more reliable and the service life is longer.

As shown in fig. 7 and 8, in this embodiment, the corrugated tube 4 is made of stainless steel, and is fixedly connected with the inner core 3 by welding, and the fold position may be in an arc shape or a sharp angle shape; the structure of the bellows 4 is not limited to the above-described form, and the material may be a non-metallic material having elasticity.

In this embodiment, the valve further comprises a pressing nut 7 installed at an opening at the upper end of the valve body 1, the pressing nut 7 is in threaded connection with the valve rod 5, the lower end of the valve rod 5 is connected with the inner core 3 and can rotate relatively, the upper end of the valve rod is fixedly connected with the hand wheel 6, the valve rod 5 is rotated through the hand wheel 6, the inner core 3 is pushed to move up and down, and the opening and closing of the valve are achieved.

Referring to fig. 3, the circumferential wall of the valve rod 5 is further provided with a limiting step 9 for limiting the maximum upward displacement of the inner core 3 and preventing the bellows 4 from being over-compressed.

With continued reference to fig. 2, in the present embodiment, the upper end of the bellows 4 is provided with an outwardly extending flange, and further includes an annular pressing member 8 for pressing the flange and the first sealing member 2 against the first sealing surface.

With reference to fig. 2, the inner sidewall of the valve body 1 is further provided with a second sealing surface at the lower side of the first sealing surface, the bottom wall of the inner core 3 is provided with an annular mounting groove at a predetermined position, the valve further comprises a second sealing member 010, the second sealing member 010 is mounted inside the annular mounting groove, the inner core 3 moves along the axial direction of the valve body 1, and the second sealing member 010 can compress or release the second sealing surface to seal or open the first valve port I.

The annular mounting groove is used for mounting the second sealing member 010, so the shape of the annular mounting groove is not limited, and the side wall of the annular mounting groove can be a plane or an arc-shaped surface.

The first sealing element 2 and the second sealing element 010 are made of polytetrafluoroethylene, the polytetrafluoroethylene has excellent chemical stability and corrosion resistance, the service life of the valve can be further prolonged, the sealing reliability is improved, and the sealing elements are made of polytetrafluoroethylene but not limited to.

With continued reference to fig. 4 to 6, fig. 4 is a schematic structural view of a first embodiment of a second sealing surface provided with an annular groove; FIG. 5 is a schematic view of a second embodiment of a second sealing surface having an annular groove; fig. 6 is a schematic view of a third embodiment of the second sealing surface provided with an annular groove.

In this embodiment, the second sealing surface is further provided with an annular groove a at a contact portion with the second sealing member 010, so as to realize double-ring sealing, and the width of the annular groove a is not limited and can be smaller than the width of a contact area between the second sealing surface and the second sealing member 010 or equal to the width of a contact area between the second sealing surface and the second sealing member 010; the specific shape of the annular groove a is not limited, and the annular groove a can be arc-shaped or sharp-horn-shaped; of course, in practice, it is also possible to provide an annular projection.

Further, the bottom wall of the annular mounting groove of the bottom wall of the inner core 3 for mounting the second sealing member 010 is also provided with at least one groove b.

Inside second sealing member 010 pressure equipment is in the annular mounting groove, simultaneously, because the sealing member can take place the creep after using for a plurality of years, consequently, drop after avoiding second sealing member 010 to use for a long time, set up at least one recess b at annular mounting groove diapire, inside second sealing member 010 can slowly get into the recess b of reserving after warping, still can realize sealing well.

In this embodiment, annular mounting groove diapire is provided with two recesses b, and in the practical application, the quantity and the shape of recess b do not do the restriction.

In order to prevent the second sealing member 010 from dropping, a stopper portion folded inward may be provided at an opening end of the annular mounting groove, and the stopper portion functions to restrict the second sealing member 010.

The valve provided by the present invention is described in detail above, and the principle and the embodiment of the present invention are explained in the present text by using specific examples, and the above description of the examples is only used to help understanding the method of the present invention and the core idea thereof. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

1. A valve, comprising a valve body (1), wherein the valve body (1) is provided with a through hole extending along the axial direction, the lower end of the through hole forms a first valve port (I), the inner wall of the valve body (1) is provided with a second valve port (O) communicated with the through hole, characterized in that,

the inner side wall of the valve body (1) is provided with a first sealing surface at the upper side of the second valve port (O), the valve body further comprises a first sealing element (2) fixedly supported on the first sealing surface, and a corrugated pipe sealing element arranged at the upper end inside the valve body (1), the corrugated pipe sealing element comprises an inner core (3) and a corrugated pipe (4) sleeved on the inner core (3), the inner core (3) can move along the axial direction of the valve body (1) to seal or open the first valve port (I), the axial lower end of the corrugated pipe (4) is fixedly connected with the inner core (3), and the upper end of the corrugated pipe is connected with the first sealing element (2) in a sealing manner.

2. The valve according to claim 1, characterized in that a gland nut (7) arranged at the opening of the upper end of the valve body (1) is in threaded connection with the valve rod (5), the lower end of the valve rod (5) is connected with the inner core (3) and can rotate relatively, and the upper end of the valve rod is fixedly connected with a hand wheel (6).

3. Valve according to claim 2, wherein the valve stem (5) peripheral wall is provided with a stop step (9) to limit the maximum upward displacement of the core (3).

4. Valve according to claim 1, wherein the bellows (4) is provided at its upper end with an outwardly extending flange edge, and further comprising an annular pressing member (8) for pressing the flange edge and the first seal member (2) against the first sealing surface.

5. The valve according to any of the claims 1 to 4, characterized in that the inner sidewall of the valve body (1) is further provided with a second sealing surface at the lower side of the first sealing surface, the bottom wall of the inner core (3) is provided with an annular mounting groove at a predetermined position, and further comprising a second sealing member (010), the second sealing member (010) is mounted inside the annular mounting groove, the inner core (3) moves along the axial direction of the valve body (1), and the second sealing member (010) can press or release the second sealing surface to seal or open the first valve port (I).

6. Valve according to claim 5, wherein the material of the first seal (2) and the second seal (010) is polytetrafluoroethylene.

7. Valve according to claim 5, wherein the second sealing surface is provided with an annular groove (a) or an annular protrusion at the location of contact with the second seal (010).

8. Valve according to claim 7, characterized in that, in an axial section of the valve body (1), the annular groove (a) has the shape of a cusp or an arc.

9. The valve according to claim 5, wherein the annular mounting groove bottom wall is further provided with at least one groove (b).