CN210290805U

CN210290805U - Hard sealing loose joint gas self-closing valve

Info

Publication number: CN210290805U
Application number: CN201921255714.1U
Authority: CN
Inventors: 陈樵
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-08-05
Filing date: 2019-08-05
Publication date: 2020-04-10
Anticipated expiration: 2029-08-05

Abstract

The utility model relates to a hard sealing loose joint gas self-closing valve, which comprises a valve body, a valve cap, a valve rod, a valve core, a loose sleeve, a retainer ring, a loose buckle, an O-shaped ring, a rod melting material, a buckling melting material, a spring, a loose joint cap, a loose joint and a hard pressing ring; the method is characterized in that: all adopt conical surface extrusion seal structure firmly between valve rod and valve cap, valve body and union, valve body and the pipeline, wherein pack by the pole melt between retaining ring terminal surface and the valve cap interior step face, pack by detaining the melt between the outer fringe of slipknot and the valve cap correspondence inner edge. The conical surface extrusion hard sealing structure is characterized in that: the loose joint cap and the loose joint or the hard pressing ring are not attached to the valve and are used as independent high-temperature-resistant hard sealing joints.

Description

Hard sealing loose joint gas self-closing valve

Technical Field

The utility model relates to a self-closing valve for high temperature resistant hard sealing belt loose joint of gas.

Background

At present, the common gas valve is sealed by a plastic sealing ring, and the plastic sealing material does not resist the high temperature of the fire disaster environment. Therefore, the fire-retardant property is not desirable.

Disclosure of Invention

The utility model aims to solve the technical problem that a simple installation is provided, high temperature environment such as conflagration has fairly tolerance, takes the control by temperature change self-closing fire prevention gas valve of union moreover.

Compared with the prior art, the utility model, following beneficial effect has: the metal hard sealing structure can obviously improve the temperature resistance and fire resistance between the inside and the outside of the valve and between the valve and a pipeline.

Drawings

Fig. 1 is a main sectional view of a hard seal loose joint pipeline gas valve structure in embodiment 1 of the present invention.

Fig. 2 is a main sectional view of a hard-sealed steel cylinder angle valve structure in embodiment 2 of the present invention.

Detailed Description

Example 1: referring to fig. 1, the present embodiment mainly includes a valve body 1, a bonnet 2, a stem 3, a valve core 4, a loop 5, a retainer ring 6, a loop 7, an O-ring 8, a stem melt 9, a loop melt 10, a spring 11, a loop cap 12, a loop 13, and a hard pressing ring 14.

The present embodiment is a hard sealing loose joint fire-proof valve for household pipeline gas, wherein the octagonal shape of the loop 5 is placed in the 8-corner column hole in the middle of the hole in the valve body 1 to limit the free rotation, but only move up and down along the axis. And the retainer ring 6 and the slipknot 7 respectively block the upper surface and the lower surface of a flange at the port of the slipcase 5 to limit the axial movement of the slipcase 5. The fastening melt 10 is filled between the outer edge of the snap 7 and the corresponding inner edge of the bonnet 2 to block the snap 7 from moving radially outward. The handle is movably clamped on a flat tenon arranged at the upper section of the valve core 4 through a flat groove arranged at the lower section of the valve rod 3 to drive the valve core 4 to rotate, and when the valve core 4 rotates, the middle threaded section screwed in the threaded hole at the lower section of the loop 5 pushes the valve core 4 to move axially. When the valve core 4 moves downwards, the conical sealing surface is pressed into the flow passage hole in the middle of the valve body 1 to open and close the valve. The stem melt 9 is supported between the upper shoulder surface of the retaining ring 6 and the inner step surface of the bonnet 2, while the inner step of the retaining ring 6 is stopped under the flange of the valve stem 3. The bonnet 2 is screwed on the valve body 1 in a threaded manner, wherein the step of the root part of the internal thread is tightly pressed on the conical surface of the outer edge of the upper port of the valve body 1 to implement hard sealing between the valve body 1 and the bonnet 2. And the conical surface in the middle of the valve cap 2 limits the upper part of the flange in the middle of the valve rod 3, and the sealing between the valve rod 3 and the valve cap 2 is implemented by the elastic O-shaped ring 8 at normal temperature. The spring 11 is arranged in the loop 5 and the spring 11 is in a compressed energy storage state by the inner bottom surface of the loop 5 and the lower surface of the retainer ring 6. When the valve rod 3 is rotated by the handle at normal temperature, the valve rod 3 drives the valve core 4 to move up and down axially through the internal thread of the loop 5, so that the valve core 4 is opened and closed. When the rod melting material 9 and the melting material 10 are melted at a high room temperature in case of fire, the upper end of the spring 11 pushes the retainer ring 6 to move upwards, so that the valve rod 3 is pushed by the retainer ring 6 to move upwards, and the flange shoulder angle of the valve rod 3 is pressed on the inner conical surface of the valve cap 2, so that hard sealing between the valve cap 2 and the valve rod 3 is realized, and the O-shaped ring 8 is prevented from being burnt and failed to cause gas leakage. Meanwhile, the lower end of the spring 11 pushes the loop 5 to move downwards to squeeze the slipknot 7 open and drive the valve core 4 to move downwards to close the valve. In order to install and maintain the valve without disassembling other parts except the valve, a movable joint cap 12 and a movable joint 13 are arranged at one end of the valve, wherein the inner step of the movable joint cap 12 presses the flange root of the movable joint 13 so that the outer conical surface of the port of the movable joint 13 is pressed on the port of the valve body 1 to implement hard sealing. A hard pressing ring 14 is arranged between the valve body and the pipeline, and when the valve body is screwed into the pipeline, conical surfaces at two ends of the hard pressing ring 14 respectively extrude the valve body and the port of the inner hole of the pipeline to form hard sealing.

Example 2: referring to fig. 2, the present embodiment mainly includes a valve body 15, a bonnet 16, a stem 17, a valve core 18, a loop 19, a retainer ring 20, a loop 21, an O-ring 22, a stem melt 23, a retaining melt 24, and a spring 25.

The embodiment is a modification of embodiment 1 into a cylinder angle valve form, and the basic structure is basically the same as the principle and the embodiment 1. The valve body form is transformed into a steel cylinder angle valve only on the basis of the embodiment 1, and meanwhile, a movable joint cap, a movable joint and a hard pressing ring are eliminated.

Although the present invention has been described in terms of embodiments, it is not intended to limit the scope of the invention, as the valve body described herein may be modified to other forms or for other fluid controls. Or the movable joint cap and the movable joint or the hard pressing ring are not attached to the valve and are used as independent high-temperature-resistant hard sealing joints. In conclusion, any modification and improvement made by those skilled in the art without departing from the spirit and scope of the present invention shall fall within the protection scope of the present invention.

Claims

1. A hard sealing loose joint gas self-closing valve comprises a valve body, a valve cap, a valve rod, a valve core, a loose sleeve, a check ring, a loose buckle, an O-shaped ring, a rod melting material, a buckling melting material, a spring, a loose joint cap, a loose joint and a hard pressing ring; the method is characterized in that: all adopt conical surface extrusion seal structure firmly between valve rod and valve cap, valve body and union, valve body and the pipeline, wherein pack by the pole melt between retaining ring terminal surface and the valve cap interior step face, pack by detaining the melt between the outer fringe of slipknot and the valve cap correspondence inner edge.

2. The conical surface extrusion hard sealing structure is characterized in that: the loose joint cap and the loose joint or the hard pressing ring are not attached to the valve and are used as independent high-temperature-resistant hard sealing joints.