CN216447424U

CN216447424U - Fire-fighting pipeline connecting piece sealing device

Info

Publication number: CN216447424U
Application number: CN202120261376.3U
Authority: CN
Inventors: 穆清利
Original assignee: Shanxi Rongsheng Ma Steel Co ltd
Current assignee: Shanxi Rongsheng Ma Steel Co ltd
Priority date: 2021-01-29
Filing date: 2021-01-29
Publication date: 2022-05-06
Anticipated expiration: 2031-01-29

Abstract

The utility model provides a fire control pipeline connecting piece sealing device, includes hollow sealing member body, the sealing member body be bilayer structure, outer support sealing layer and the interior pressure sealing layer of inlayer promptly. Wherein the outer layer surface of the supporting sealing layer is a conical surface or a cylindrical surface, and the inner layer surface is a cylindrical surface. The inner layer surface and the outer layer surface of the internal pressure sealing layer are both conical surfaces. The sealing device is applied to the connecting piece of the fire-fighting pipeline, the outer structural layer is used for sealing a gap between the pipeline and the connecting piece, and the inner structural layer is used for sealing the pipeline in a ring joint mode by using the static pressure of a water body in the connecting piece.

Description

Fire-fighting pipeline connecting piece sealing device

Technical Field

The utility model relates to a sealing device used in a fluid conveying pipeline connecting piece, in particular to a fire-fighting pipeline connecting piece sealing device which is used for connecting and sealing a high-pressure fire-fighting pipeline or a pipeline for common conveying fluid.

Background

The sealing device used in the fire-fighting pipeline connecting piece in the prior art is usually a sealing ring or an O-shaped ring, and the sealing device disclosed by the patent adopts a hollow body-shaped sealing gasket made of synthetic rubber or synthetic resin and is provided with an inclined outer surface, and when the sealing device is used, the axial force from a nut extrudes to ensure that the sealing device is pressed and deformed in a wedge-shaped gap formed between a pipeline and a connecting body to seal the wedge-shaped circumferential gap.

Disclosure of Invention

The utility model provides a sealing device for a fire-fighting pipeline connecting piece, which comprises a hollow sealing piece body and is characterized in that the sealing piece body is of a double-layer structure and comprises an outer supporting sealing layer and an inner internal pressure sealing layer.

The sealing device for the fire-fighting pipeline connecting piece is characterized in that the outer layer surface of the supporting sealing layer is a conical surface, and the inner layer surface of the supporting sealing layer is a cylindrical surface.

The sealing device for the fire-fighting pipeline connecting piece is characterized in that the supporting sealing layer is a hollow cylindrical uniform-thickness structural layer, and the outer layer surface and the inner layer surface of the supporting sealing layer are cylindrical surfaces.

The fire-fighting pipeline connecting piece sealing device is characterized in that the inner layer surface and the outer layer surface of the inner pressure sealing layer are both conical surfaces.

According to the sealing device for the fire-fighting pipeline connecting piece, the height of the internal pressure sealing layer is one third to two thirds of the height of the supporting sealing layer, and the branching position between the internal pressure sealing layer and the supporting sealing layer is of a V-shaped structure or an approximate inverted pi-shaped structure.

The fire-fighting pipeline connecting piece sealing device is characterized in that the connecting surface between the internal pressure sealing layer and the supporting sealing layer is an arc-shaped surface.

The fire-fighting pipeline connecting piece sealing device is characterized in that an annular groove is formed in the lower portion of the internal pressure sealing layer.

The utility model relates to a sealing device for a fire-fighting pipeline connecting piece, which is applied to the connecting piece of a fire-fighting pipeline.

Drawings

FIG. 1 is a perspective view of a sealing device;

FIG. 2 is a front view of the sealing device;

FIG. 3 is a left side view of FIG. 2;

FIG. 4 is a sectional view taken along line B-B of FIG. 2;

FIG. 5 is a front view of a second embodiment of the sealing device;

FIG. 6 is a left side view of FIG. 5;

FIG. 7 is a view A-A of FIG. 5;

FIG. 8 is a schematic cross-sectional view of a third embodiment of the sealing device;

fig. 9 is a schematic diagram of the bifurcation position of the inverted pi-shaped structure.

In the figure, 1-support the sealing layer; 2-internal pressure sealing layer; 3-inner layer surface of inner pressure sealing layer; 4-an annular groove; 5-arc surface; 6-outer surface of inner pressure sealing layer; 7-supporting the inner layer surface of the sealing layer; 8-supporting the outer layer surface of the sealing layer; 9-the bifurcation position; 10-cylindrical bottom.

Detailed Description

The present invention is described in detail below with reference to the attached drawings.

As shown in figure 1, the fire-fighting pipeline connecting piece sealing device comprises an inner layer and an outer layer, wherein the outer layer is a supporting sealing layer 1 which is a main structure layer of the sealing device, and an internal pressure sealing layer 2 is arranged in the supporting sealing layer.

In the embodiment of the utility model shown in figures 2-4, the outer face of the supporting seal layer 1 is shown as a tapered face with a slight taper inwards in the axial direction and the overall outer face is shown as the outer face 8 of the supporting seal layer, so that the outer face can be smoothly inserted into the end cavity of the pipe body during operation, and the outer face is prevented from having an interference fit with the inner wall of the pipe body to affect quick installation or removal. Meanwhile, the taper is small, so that the sealing between the outer wall of the supporting sealing layer and the wall of the end cavity cannot be influenced. The inner layer surface 7 of the supporting sealing layer is a cylindrical surface. The function of supporting the sealing layer 1 in the fire-fighting pipeline connecting piece is mainly to seal a gap between a pipeline and a connecting piece pipe body, and under the action of axial force generated by a connecting pipe fitting, the supporting sealing layer is axially pressed to generate radial expansion, so that the supporting sealing layer is tightly attached to the inner wall of a sealing cavity of the connecting piece pipe body and wraps the outer peripheral surface of the connecting pipe body at the end part, and the sealing effect is realized.

The inner pressure seal layer 2 is integrally connected to the lower portion to the bottom portion of the support seal layer 1, and both the outer surface 6 of the inner pressure seal layer and the inner surface 3 of the inner pressure seal layer are tapered surfaces, and the inner pressure seal layer does not greatly affect the axial force from the outside, and the inner periphery of the inner pressure seal layer is closely and annularly connected to the outer surface of the pipe passage in the connector according to the design requirements. In the use process, the static pressure generated by the high-pressure water flow passing through the connecting piece pipe body and the water retained in the pipe body acts on the outer layer surface of the inner pressure sealing layer to form a radial force, so that the annular joint part of the inner pressure sealing layer and the inserted pipeline generates a sealing effect, and the expected sealing effect is realized.

As shown in fig. 4, the lower portion of the inner pressure-tight seal layer has an annular groove 4, so that when the sealing device is subjected to axial pressure, the axial force is not transmitted to the upper portion of the inner pressure-tight seal layer due to the annular groove, and the close annular joint of the inner pressure-tight seal layer and the surface of the inner insert pipeline is prevented from being damaged. The connecting surface between the bottom of the internal pressure sealing layer and the supporting sealing layer is designed into an arc-shaped surface 5, the curvature of the arc-shaped surface is very small from the section, and the function of the connecting surface is that the inserted pipeline can smoothly enter a hole in the connecting piece in the process of quick connection without accurate centering. Meanwhile, the arc-shaped surface structure can also reduce the influence of external axial force on the internal pressure sealing layer.

As shown in fig. 4, the height of the inner pressure seal layer is about two thirds of the height of the support seal layer.

In a further embodiment of the utility model, shown in fig. 5-7, the inner and outer faces of the supporting sealant layer are cylindrical, i.e. the wall thickness of the supporting sealant layer is the same throughout. In the figure, the bifurcation position 9 of the internal pressure sealing layer and the supporting sealing layer is of an inverted pi-shaped structure, as shown in figure 9.

As shown in fig. 7, the height of the inner pressure sealant layer is more than one-third and less than one-half the height of the support sealant layer.

Fig. 8 shows another embodiment of the utility model, in which there is no transition arc-shaped surface between the inner pressure seal layer and the bottom of the support seal layer, but rather a cylindrical inner surface from the annular groove to the bottom to form a cylindrical bottom 10, which expands obliquely inward when the sealing device is subjected to an axial force, closing the sealing device against the outer surface of the connecting pipe element, thereby providing a reinforced seal.

As shown in fig. 4 and 8, the branching position of the inner pressure seal layer and the supporting seal layer is a V-shaped structure.

Claims

1. The sealing device for the fire-fighting pipeline connecting piece comprises a hollow sealing piece body and is characterized in that the sealing piece body is of a double-layer structure and comprises an outer supporting sealing layer (1) and an inner internal pressure sealing layer (2).

2. A fire-fighting pipe connection fitting sealing arrangement according to claim 1, characterised in that the supporting sealant (1) comprises a supporting sealant outer face (8) and a supporting sealant inner face (7), the supporting sealant outer face being a conical face and the supporting sealant inner face being a cylindrical face.

3. The fire-fighting pipeline connector sealing device according to claim 1, wherein the supporting sealing layer is a hollow cylindrical uniform-thickness structural layer, and both the outer layer surface and the inner layer surface are cylindrical surfaces.

4. A fire-fighting pipe connection fitting sealing device according to claim 1, 2 or 3, wherein both the inner and outer surfaces of the inner pressure containment layer are tapered.

5. The fire service coupling seal arrangement of claim 4, wherein the inner pressure containment layer has a height of one third to two thirds of the height of the support containment layer, and the bifurcation point (9) between the inner pressure containment layer and the support containment layer is of a V-shaped configuration or an approximately inverted pi-shaped configuration.

6. The fire-fighting pipeline connecting piece sealing device according to claim 5, wherein the connecting surface between the inner pressure sealing layer and the supporting sealing layer is an arc-shaped surface (5).

7. A fire-fighting pipe connection piece sealing device according to claim 5 or 6, characterized in that the lower part of the inner pressure-tight layer is provided with an annular groove (4).