CN214198140U

CN214198140U - Valve seat structure of high-pressure hydrogen cylinder

Info

Publication number: CN214198140U
Application number: CN202022642467.XU
Authority: CN
Inventors: 袁君伟; 白勇; 迟明; 李均; 徐凯; 朱明国
Original assignee: Jiangyin Furen High Tech Co Ltd
Current assignee: Jiangyin Furen High Tech Co Ltd
Priority date: 2020-11-16
Filing date: 2020-11-16
Publication date: 2021-09-14
Anticipated expiration: 2030-11-16

Abstract

The invention discloses a valve seat structure of a high-pressure hydrogen cylinder, which comprises a shell formed by winding composite fiber filaments, a non-metal lining and a valve seat, wherein the top end of the valve seat is provided with a pressurizing opening, the valve seat is provided with a tubular neck which protrudes outwards through an opening on the shell, the bottom end of the valve seat in the shell extends outwards in the radial direction to form an annular flange, the annular flange strengthens the strength of the outer surface of the periphery of the opening in the shell, a sealing surface is arranged in the valve seat, the sealing surface is tightly bonded with the lining, the tubular neck outside the valve seat is tightly bonded with the shell, the bottom of the sealing surface in the valve seat is uniformly provided with a plurality of concave clamping grooves along the circumference, the middle of the sealing surface in the valve seat is uniformly provided with a plurality of annular clamping grooves with saw-toothed distribution in section along the axis, and clamping structures corresponding to the concave clamping grooves and the annular clamping grooves are arranged on the lining and matched with each other clamping structures. The valve seat structure of the high-pressure hydrogen cylinder reduces the shear stress between the valve seat and the lining, and improves the torsion resistance and the tensile resistance of the valve seat structure.

Description

Valve seat structure of high-pressure hydrogen cylinder

Technical Field

The invention relates to a valve seat structure of a pressure container, in particular to a valve seat structure of a high-pressure hydrogen cylinder.

Background

In many cases, having a lighter weight, high shatter resistance and high corrosion resistance are highly desirable characteristics of pressure vessels. These design criteria have been met by developing high pressure composite vessels made from wound glass filaments or laminated layers of various types of composite fiber filaments, which are bonded together by a thermosetting epoxy resin. An elastomeric or other non-metallic elastomeric liner or bladder is suspended within the composite filament wound outer shell to seal the vessel and prevent internal fluids from contacting the composite material.

The composite fiber filament winding vessel is typically configured in a spherical or cylindrical shape with generally spherical ends for high pressure applications. The valve seat serves to securely engage the inner liner with the outer composite shell at the pressurization port of the shell, thereby preventing fluid from seeping between the liner and the shell. Pressure vessels are commonly used in high pressure environments. Thus, as the internal pressure increases, extreme pressures are experienced between the valve seat, the liner, and the housing. More specifically, as the pressure within the vessel increases, a load bearing force is created between the valve cup and the composite shell, creating shear stress between the valve cup and the liner, which causes the valve cup to twist or stretch. Resulting in the inner liner and outer shell not remaining in secure engagement with the valve seat, resulting in leakage.

Therefore, reducing shear stress and increasing the resistance of the valve seat structure to torsion and tension is of great importance.

Disclosure of Invention

In order to solve the technical problem, the invention designs a valve seat structure of a high-pressure hydrogen cylinder.

The invention adopts the following technical scheme:

the utility model provides a high pressure hydrogen cylinder disk seat structure, shell including the winding formation of composite fiber filament, non-metallic lining and disk seat, the pressure port has been seted up on the disk seat top, the disk seat has the outside outstanding tubulose neck of opening on through the shell, the bottom of disk seat radially outwards extends and forms annular flange in the shell, the intensity of the peripheral surface of opening in the shell is strengthened to annular flange, be provided with sealed face in the disk seat, sealed face closely bonds with the lining, the outer tubulose neck of disk seat closely bonds with the shell, disk seat internal seal face bottom evenly is provided with a plurality of indent draw-in grooves along the circumference, disk seat internal seal face middle part evenly is provided with a plurality of ring groove that the cross-section is zigzag distribution along the axis, it sets up the block structure cooperation to correspond indent draw.

Preferably, the valve seat material is composed of aluminum, steel, an alloy or composite of nickel and titanium.

Preferably, a shear stress relief layer is arranged between the outer shell and the lining at the annular flange at the bottom end of the valve seat. To accommodate relative sliding movement between the shell, liner and valve seat during pressurization. Reducing shear stress between the valve seat and the liner.

Preferably, the shear stress relief layer is a non-metallic layer.

Preferably, the shear stress relief layer is made of plastic.

Preferably, the liner is made of high density polyethylene.

Preferably, the housing is formed from fiberglass filaments or other types of synthetic filaments.

Preferably, the concave clamping groove is a hexagonal concave clamping groove, and the inner surface of the concave clamping groove is an inclined plane.

The invention has the beneficial effects that: (1) the bottom of the inner sealing surface of the valve seat of the high-pressure hydrogen cylinder valve seat structure is uniformly provided with a plurality of concave clamping grooves along the circumference, so that the torsion resistance of the valve seat structure is improved; (2) a plurality of annular clamping grooves with saw-toothed sections are uniformly arranged in the middle of the inner sealing surface of the valve seat along the axis, so that the tensile resistance of the valve seat structure is improved; (3) and a shear stress relief layer is arranged between the shell and the lining at the annular flange at the bottom end of the valve seat. To accommodate relative sliding between the shell, liner, and valve seat during pressurization; reducing shear stress between the valve seat and the liner.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present invention;

FIG. 2 is a front view of the valve seat of the present invention;

FIG. 3 is a cross-sectional view taken along the line A-A in FIG. 2;

FIG. 4 is a top view of FIG. 2;

FIG. 5 is a perspective view of a valve seat of the present invention;

in the figure: 1. the device comprises a shell, 2, a lining, 3, a valve seat, 4, a pressure port, 5, a hexagonal concave clamping groove, 6, an annular clamping groove, 7 and a shear stress relieving layer.

Detailed Description

The technical scheme of the invention is further described in detail by the following specific embodiments in combination with the attached drawings:

example (b): as shown in attached figures 1-5, the high-pressure hydrogen cylinder valve seat structure comprises a shell 1 formed by winding composite fiber filaments, a non-metal lining 2 and a valve seat 3, wherein a pressurizing opening 4 is formed in the top end of the valve seat, the valve seat is provided with a tubular neck protruding outwards through an opening in the shell, the bottom end of the valve seat in the shell extends outwards in the radial direction to form an annular flange, the annular flange strengthens the strength of the outer surface of the periphery of the opening in the shell, a sealing surface is arranged in the valve seat and is tightly bonded with the lining, the tubular neck outside the valve seat is tightly bonded with the shell, three concave clamping grooves are uniformly formed in the bottom of the sealing surface in the valve seat along the circumference, four annular clamping grooves 6 with saw-toothed cross sections are uniformly arranged in the middle of the sealing surface in the valve seat along the axis, and clamping structures are arranged on the lining corresponding to the concave clamping grooves and the annular clamping grooves. The concave clamping groove is a hexagonal concave clamping groove 5, and the inner surface of the concave clamping groove is a diagonal plane.

The valve seat material is composed of aluminum, steel, nickel and titanium alloy or composite material.

A shear stress relief layer 7 is provided between the outer shell and the liner at the annular flange at the bottom end of the valve seat. The shear stress relief layer is made of plastic.

The liner is made of high density polyethylene.

The housing is formed from fiberglass filaments or other types of synthetic filaments.

The bottom of the inner sealing surface of the valve seat of the high-pressure hydrogen cylinder valve seat structure is uniformly provided with three concave clamping grooves along the circumference, so that the torsion resistance of the valve seat structure is improved; four annular clamping grooves with saw-toothed sections are uniformly arranged in the middle of the inner sealing surface of the valve seat along the axis, so that the tensile resistance of the valve seat structure is improved; a shear stress relief layer is disposed between the outer shell and the liner at the annular flange at the bottom end of the valve seat. To accommodate relative sliding between the shell, liner, and valve seat during pressurization; reducing shear stress between the valve seat and the liner.

The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the spirit of the invention as set forth in the claims.

Claims

1. The utility model provides a high pressure hydrogen cylinder disk seat structure, includes shell, non-metallic lining and the disk seat that the winding of composite fiber filament formed, and the pressure port has been seted up on the disk seat top, and the disk seat has the outside outstanding tubulose neck of opening through on the shell, and the bottom of disk seat radially outwards extends and forms annular flange in the shell, and the peripheral intensity of surface of opening in the shell is strengthened to annular flange, characterized by, be provided with sealed face in the disk seat, sealed face and lining closely bond, and the tubulose neck outside the disk seat closely bonds with the shell, and disk seat internal seal face bottom evenly is provided with a plurality of indent draw-in grooves along the circumference, and disk seat internal seal face middle part evenly is provided with a plurality of ring groove that the cross-section is zigzag distribution along the axis, corresponds indent draw-in groove and ring groove position and sets up the block structure cooperation on the lining.

2. The valve seat structure for high-pressure hydrogen cylinders according to claim 1, wherein a shear stress relief layer is provided between the outer shell and the liner at the annular flange at the bottom end of the valve seat.

3. The valve seat structure for a high pressure hydrogen cylinder according to claim 2, wherein the shear stress relief layer is a non-metallic layer.

4. The valve seat structure for a high-pressure hydrogen cylinder according to claim 3, wherein the shear stress relief layer is made of plastic.

5. The valve seat structure for a high pressure hydrogen cylinder according to claim 1, wherein the liner is made of high density polyethylene.

6. The valve seat structure for a high pressure hydrogen cylinder according to claim 1, wherein the outer shell is formed of a filament of glass fiber.

7. The valve seat structure of a high-pressure hydrogen cylinder as claimed in claim 1, wherein the recessed groove is a hexagonal recessed groove, and the inner surface of the recessed groove is a chamfered surface.