CN218523408U

CN218523408U - Bottleneck seal structure of high-pressure gas bomb

Info

Publication number: CN218523408U
Application number: CN202222830939.3U
Authority: CN
Inventors: 李桂生; 魏双; 王少彬
Original assignee: Hangzhou Yukun Technology Co ltd
Current assignee: Hangzhou Yukun Technology Co ltd
Priority date: 2022-10-26
Filing date: 2022-10-26
Publication date: 2023-02-24
Anticipated expiration: 2032-10-26

Abstract

The utility model discloses a bottleneck seal structure of high-pressure gas bomb, including bottleneck disk seat and the plastics inside lining that has the centre bore, the top cladding of plastics inside lining the lower tip of bottleneck disk seat is provided with hollow bottleneck disk seat inside lining in the centre bore of bottleneck disk seat, bottleneck disk seat inside lining and bottleneck disk seat screw-thread fit and stretch into with the plastics inside lining partial looks butt in the centre bore, the cover is equipped with the bottleneck valve on the upper end of bottleneck disk seat. The utility model discloses can realize high-pressure multi-stage seal, simple structure is sealed reliable simultaneously.

Description

Bottleneck seal structure of high-pressure gas bomb

Technical Field

The utility model relates to a high-pressure gas storage facilities technical field, concretely relates to bottleneck seal structure of high-pressure gas bomb.

Background

Along with gas cylinder pressure is higher and higher, the gas cylinder seal structure design degree of difficulty is higher and higher. The working pressure of the high-pressure hydrogen storage cylinder reaches 70MPa, and the requirement on the reliability of the sealing structure is very high. At present, the inner lining of a gas cylinder which is used more is mostly a metal inner lining, and the outer layer is wound with carbon fiber and glass fiber and the like. With the improvement of the hydrogen storage density requirement of unit mass of the vehicle-mounted gas cylinder, the plastic lining composite material hydrogen storage gas cylinder is developed.

The patent specification with the publication number of CN213872192U discloses a plastic lining fiber reinforced composite material high-pressure hydrogen storage cylinder, which comprises a plastic lining, a metal cylinder opening end and a metal cylinder tail end; the outer side of the fiber reinforced layer is wound with a glass fiber protective layer, and the outer sides of the glass fiber protective layers of the end sockets at two ends of the metal gas cylinder are provided with gas cylinder end socket anti-collision layers; an O-shaped ring is arranged between the opening end of the plastic lining and the axial lower end surface of the opening end of the metal gas cylinder, and an inner check ring on the inner side of the O-shaped ring and an outer check ring on the outer side of the O-shaped ring are arranged in an O-shaped ring groove on the axial lower end surface of the opening end of the metal gas cylinder; the O-shaped ring is screwed with the thread at the lower end of the opening end of the metal gas cylinder through the plastic lining, the anti-loosening gasket and the spring gasket in sequence and the compression nut; the anti-loosening gasket is uniformly provided with a plurality of metal sheets along the outer circumference; the outer side of the lower end of the opening end of the metal gas cylinder, which is provided with the thread, is provided with a groove, and the width of the groove is larger than that of the metal sheet on the anti-loosening gasket.

In the above scheme, the axial lower terminal surface of plastics inside lining open end and metal gas cylinder open end is with the adhesive bonding, recycles gland nut and realizes locking sealing, and the adhesive bonding sealing mode is unreliable, and gland nut locking sealing also has sealed unreliable problem simultaneously.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a bottleneck seal structure of high-pressure gas bomb can realize the multistage sealed of high pressure, simple structure simultaneously, and is sealed reliable.

The bottle mouth sealing structure of the high-pressure gas storage bottle comprises a bottle mouth valve seat and a plastic lining, wherein the bottle mouth valve seat is provided with a central hole, the top of the plastic lining covers the lower end part of the bottle mouth valve seat, a hollow bottle mouth valve seat lining is arranged in the central hole of the bottle mouth valve seat, the bottle mouth valve seat lining is in threaded fit with the bottle mouth valve seat and is abutted to the part, extending into the central hole, of the plastic lining, and a bottle mouth valve is sleeved on the upper end part of the bottle mouth valve seat.

In the scheme, after the bottle mouth valve seat lining is installed in place, the plastic lining in the central hole of the bottle mouth valve seat is pressed, so that the plastic lining and the bottle mouth valve seat are tightly attached; along with the increase of the internal pressure of the gas cylinder, the pressing force of the gas pressure on the plastic lining is larger, the plastic lining and the bottle mouth valve seat are pressed more tightly, the gas is difficult to leak through the gap between the plastic lining and the bottle mouth valve seat, and the sealing reliability is greatly enhanced.

Preferably, the inner peripheral surface of the lower end part of the bottle mouth valve seat is provided with a plurality of annular gaps, and the annular gaps are filled with the parts of the plastic lining extending into the central hole.

Preferably, the peripheral surface of the lower end part of the bottle mouth valve seat extends outwards to form a bulge, a groove in annular cloth is formed in the bulge, and the plastic lining covers the bulge and fills the groove.

Further preferably, the protrusions are located in the grooves, a plurality of uniformly distributed and penetrating through holes are formed in the protrusions, and the through holes are filled with the plastic lining.

In this scheme, annular breach, recess and through-hole on the bottleneck disk seat can be filled to the plastics inside lining after the shaping for plastics inside lining and bottleneck disk seat form a firm whole.

Preferably, the bottle mouth valve seat lining is sleeved with a sealing gasket which is used for being in sealing fit with the part of the plastic lining extending into the central hole.

This scheme, through the leakproofness between seal ring reinforcing bottleneck disk seat inside lining and plastics inside lining.

Preferably, the bottle mouth valve comprises a valve core and a rotating part arranged at the top of the valve core, the valve core is in threaded fit with the bottle mouth valve seat, and a plurality of O-shaped rings used for being in sealing fit with the bottle mouth valve seat are sleeved on the lower end part of the valve core.

Preferably, the upper end face of the bottle mouth valve seat is provided with an annular groove, and the upper end face of the bottle mouth valve seat is in sealing fit with the rotating part of the bottle mouth valve through a gasket arranged in the annular groove.

The utility model has the advantages that:

1. the annular gap, the groove and the through hole are designed on the bottleneck valve seat, so that the contact area between the plastic lining and the bottleneck valve seat is increased, the adhesion between the plastic lining and the bottleneck valve seat is enhanced, and the plastic lining and the bottleneck valve seat are tightly adhered under the compression action of the bottleneck valve seat lining and the sealing washer; along with the increase of the internal pressure of the gas cylinder, the pressing force of the gas pressure on the plastic lining is larger, the plastic lining and the valve seat of the bottle opening are pressed more tightly, and the gas is more difficult to leak through the gap between the plastic lining and the valve seat of the bottle opening.

2. And a plurality of sealing structures are adopted, so that the sealing performance is more reliable. The first sealing adopts the sealing between the upper end surface of the bottle mouth valve seat and the contact surface of the bottle mouth valve by adopting a gasket, and the second sealing adopts the sealing between the inner peripheral surface of the bottle mouth valve seat and the bottle mouth valve by adopting a plurality of O-shaped rings.

Drawings

FIG. 1 is a schematic cross-sectional view of the fiber reinforced layer wound outside the sealing structure of the bottle mouth of the present invention;

FIG. 2 is a cross-sectional view of a bottleneck valve;

fig. 3 is a cross-sectional view of a sealing gasket.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1 and 2, a bottleneck sealing structure of a high-pressure gas storage bottle comprises a bottleneck valve seat 2 and a plastic lining 6, wherein the top of the plastic lining 6 covers the lower end part of the bottleneck valve seat 2, the plastic lining 6 and the bottleneck valve seat 2 jointly form a gas storage bottle liner, and a bottleneck valve 8 is sleeved on the upper end part of the bottleneck valve seat 2.

The bottle mouth valve seat 2 is of a hollow cylindrical structure, a plurality of annular gaps 21 are formed in the inner circumferential surface of the lower end portion of the bottle mouth valve seat 2, an ellipsoidal bulge 22 is formed by outwards extending the outer circumferential surface of the lower end portion of the bottle mouth valve seat 2, a groove 23 with annular cloth is formed in the bulge 22, the plastic lining 6 wraps the bulge 22 and fills the groove 23, and meanwhile, the plastic lining 6 extends into the central hole of the bottle mouth valve seat 2 and fills the annular gaps 21. In this embodiment, a plurality of through holes 5 are uniformly distributed and penetrate through the groove 23 on the protrusion 22, and the plastic liner 6 fills the through holes 5 when being formed, so that the plastic liner 6 penetrates through the holes and the grooves at the lower end of the bottle mouth valve seat 2, thereby forming a firm whole.

A hollow bottleneck valve seat lining 3 is arranged in the central hole of the bottleneck valve seat 2, as shown in fig. 3, the bottleneck valve seat lining is a metal ring, and the bottleneck valve seat lining is in threaded fit with the bottleneck valve seat, so that the installation is convenient; after the bottle mouth valve seat lining 3 and the plastic lining 6 are installed in place, the inner parts of the central holes of the bottle mouth valve seat lining 2 are extended into the bottle mouth valve seat lining 3 and the plastic lining 6 and are abutted; in the embodiment, a groove is processed on the outer circumferential surface of the bottle mouth valve seat lining 3, a sealing washer 4 is arranged in the groove, the bottle mouth valve seat lining 3 and the sealing washer 4 compress the plastic lining 6 together, and the sealing performance between the plastic lining 6 and the bottle mouth valve seat 2 is ensured.

After the bottleneck valve seat lining 3 is installed in place, the contact area and the attaching performance are increased by adopting the annular gap 21, the groove 23 and the through hole 5 between the plastic lining 6 and the bottleneck valve seat 2, and the plastic lining 6 is tightly attached to the bottleneck valve seat 2 under the compression action of the bottleneck valve seat lining 3 and the sealing washer 4; along with the increase of the internal pressure of the gas cylinder, the pressing force of the gas pressure on the plastic lining 6 is larger, the plastic lining 6 and the bottle mouth valve seat 2 are pressed more tightly, the gas is more difficult to leak through the gap between the plastic lining 6 and the bottle mouth valve seat 2, and the self-tightening sealing is ingeniously realized.

The bottleneck valve 8 comprises a valve core 81 and a rotating part 82 arranged at the top of the valve core 81, and the valve core 81 is in threaded fit with the bottleneck valve seat 2, so that the installation is convenient; an annular groove is formed in the upper end face of the bottleneck valve seat 2, a gasket 1 is arranged in the annular groove, and after the bottleneck valve 8 is installed in place, the rotating part 81 of the bottleneck valve 8 extrudes the gasket 1 to form first sealing; an O-shaped ring groove is formed in the lower end portion of the valve core 81, a plurality of O-shaped rings 9 are sleeved in the O-shaped ring groove, and the bottleneck valve 8 is matched with the bottleneck valve seat 2 through the O-shaped rings 9 to form a second seal.

Because no matter which runner the gas in the gas cylinder leaks, all have the sealed gas leakage that prevents of multichannel to realized multistage sealed, made the high-pressure gas in the gas cylinder can't reveal away from this, realized effectual sealed.

The utility model discloses a can obtain a complete high-pressure gas bomb at the gas bomb inner bag surface winding fibre enhancement layer 7 that plastic lining 6 and bottleneck disk seat 2 constitute jointly, in addition, high-pressure gas bomb also can set up two bottlenecks, and the seal structure of two bottlenecks is above-mentioned bottleneck seal structure together.

In this embodiment, the plastic liner 6 is made of nylon 6, nylon 66, polypropylene, high polymer material of HDPE or LDPE, or the like.

In this embodiment, the material of the bottle mouth valve seat 2 is aluminum alloy, stainless steel or hydrogen-resistant high-strength steel.

In this embodiment, the sealing gasket 4 and the "O" ring 9 are made of a sealing material having hydrogen corrosion resistance, such as nitrile rubber, silicone rubber, or polytetrafluoroethylene.

In this embodiment, the gasket 1 is made of a nonmetal such as rubber, polytetrafluoroethylene, PA, or PEEK, or a metal such as pure aluminum or pure copper.

In this embodiment, the material of the fiber reinforced layer 7 is carbon fiber, boron fiber, kevlar fiber, glass fiber, or the like.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. The bottleneck sealing structure of the high-pressure gas storage bottle is characterized by comprising a bottleneck valve seat and a plastic lining, wherein the bottleneck valve seat is provided with a central hole, the top of the plastic lining covers the lower end part of the bottleneck valve seat, a hollow bottleneck valve seat lining is arranged in the central hole of the bottleneck valve seat, the bottleneck valve seat lining is in threaded fit with the bottleneck valve seat and is abutted to the part, extending into the central hole, of the plastic lining, and a bottleneck valve is sleeved on the upper end part of the bottleneck valve seat.

2. The sealing structure of the mouth of a high-pressure gas cylinder according to claim 1, wherein the inner peripheral surface of the lower end portion of the mouth valve seat is provided with a plurality of annular notches, and the portion of the plastic liner extending into the central hole fills the annular notches.

3. The bottleneck sealing structure of the high-pressure gas cylinder according to claim 1, wherein the outer peripheral surface of the lower end of the bottleneck valve seat extends outwards to form a protrusion, the protrusion is provided with a groove distributed annularly, and the plastic liner covers the protrusion and fills the groove.

4. The sealing structure for the mouth of a high-pressure gas cylinder according to claim 3, wherein a plurality of through holes are uniformly distributed and penetrate through the protrusion and located in the groove, and the through holes are filled with the plastic lining.

5. The sealing structure for the mouth of the high-pressure gas storage bottle according to claim 1, wherein the mouth valve comprises a valve core and a rotating part arranged on the top of the valve core, the valve core is in threaded fit with a mouth valve seat, and a plurality of O-shaped rings for sealing fit with the mouth valve seat are sleeved on the lower end part of the valve core.

6. The mouth sealing structure of a high-pressure gas cylinder according to claim 5, wherein an annular groove is provided on the upper end surface of the mouth valve seat, and the upper end surface of the mouth valve seat is in sealing engagement with the rotating portion of the mouth valve through a gasket provided in the annular groove.