CN216148888U

CN216148888U - Pressure reducer small piston with double sealing rings and ball head and large piston matched with pressure reducer small piston

Info

Publication number: CN216148888U
Application number: CN202122130384.7U
Authority: CN
Inventors: 张守政; 吕建设; 潘雪磊
Original assignee: Shanghai Baoya Safety Equipment Co ltd
Current assignee: Shanghai Baoya Safety Equipment Co ltd
Priority date: 2021-09-06
Filing date: 2021-09-06
Publication date: 2022-04-01
Anticipated expiration: 2031-09-06

Abstract

The utility model relates to the technical field of pressure reducer accessories, in particular to a pressure reducer small piston with double sealing rings and a ball head and a large piston matched with the pressure reducer small piston, wherein the cylindrical surface of the small piston is provided with at least two sealing ring grooves, the sealing rings are arranged in the sealing ring grooves, the end part of the small piston is in a spherical shape, and the pressure reducer has the advantages that: the double sealing rings on the small piston can keep the small piston shaft and the large piston shaft to be coincided, and the sealing line is always kept well sealed on one tangent line when the pressure reducer is closed. When the pressure reducer is opened, the maximum flux of the opening can be kept, and the streamline-shaped curved surface of the ball head enables the smooth flow of the airflow to be larger. Thereby the pressure reducer has good performance and stability, and the breathing is more comfortable.

Description

Pressure reducer small piston with double sealing rings and ball head and large piston matched with pressure reducer small piston

Technical Field

The utility model relates to the technical field of pressure reducer accessories, in particular to a small pressure reducer piston with double sealing rings and a ball head and a large piston matched with the small pressure reducer piston.

Background

The pressure reducer is widely applied to the pressure reduction of the output end of various high-pressure containers, so that high-pressure gas in the high-pressure container is reduced into medium and low pressure through the pressure reducer and then is output for use, and the pressure reduction performance and the stability of the pressure reducer are particularly important. The core of the existing air respirator pressure reducer is a small piston and a large piston, the small piston is a single sealing ring and a circular truncated cone inclined surface sealing head, and only one fulcrum is arranged on the small piston of the single sealing ring when the small piston slides in a small piston hole on the large piston, so that the pressure reducer is easy to swing. When the small piston is closed, the sealing surface of the small piston head and the sealing fillet of the large piston cannot be kept tangent at one position to form a plurality of tangent lines, so that poor sealing is caused to cause high-pressure leakage; when the small piston is opened, the sharp corner at the edge of the head of the small piston of the circular truncated cone inclined surface sealing head blocks part of the opening, so that the flux formed by the opening is smaller than the flux at the tangential position, the opening reduces the obstruction of air flow, and meanwhile, the sharp corner at the edge of the end surface of the small piston of the circular truncated cone inclined surface sealing head cannot form a streamline-shaped curved surface on the surface of the air flow, so that the air flow is obstructed. Particularly, on the pressure reducer of the air respirator, the existing single sealing ring and the small piston with the round platform inclined surface sealing head have poor sealing and particularly outstanding airflow blockage, so that the performance and the stability of the pressure reducer are reduced, and the breathing comfort is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the defects of the prior art and provides a small pressure reducer piston with a double sealing ring and a ball head and a large piston matched with the small pressure reducer piston.

In order to realize above-mentioned purpose, design the little piston of pressure reducer of two sealing washers in area and bulb, its characterized in that: the cylindrical surface of the small piston is provided with at least two sealing ring grooves, sealing rings are arranged in the sealing ring grooves, and the end part of the small piston is spherical.

Still relate to a big piston with foretell little piston cooperation, its characterized in that: the middle part of the large piston is provided with a channel which is communicated from front to back, and the small piston is arranged in the channel of the large piston and can block the channel of the large piston.

Preferably, the large piston axis coincides with the small piston axis.

Compared with the prior art, the utility model has the advantages that: the double sealing rings on the small piston can keep the small piston shaft and the large piston shaft to be coincided, and the sealing line is always kept well sealed on one tangent line when the pressure reducer is closed. When the pressure reducer is opened, the maximum flux of the opening can be kept, and the streamline-shaped curved surface of the ball head enables the smooth flow of the airflow to be larger. Thereby the pressure reducer has good performance and stability, and the breathing is more comfortable.

Drawings

FIG. 1 is a cross-sectional view of a small piston according to the present invention;

FIG. 2 is a cross-sectional view of a large piston according to the present invention;

FIG. 3 is a view of the small piston according to the present invention in a closed state;

FIG. 4 is a view of the small piston of the present invention in an open state;

in the figure: 1. the small piston 2, the large piston 3, the sealing ring 4, the large piston sealing fillet 5, the small piston hole 6 on the large piston, the sealing surface of the small piston head and the tangent line of the large piston sealing fillet.

Detailed Description

The present invention is further described below in conjunction with the following drawings, the structure and principle of which will be apparent to those skilled in the art. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

Referring to fig. 1, the utility model designs a small pressure reducer piston with double sealing rings and a ball head, wherein two sealing ring grooves are designed on the cylindrical surface of the small pressure reducer piston and are provided with the two sealing rings, and the sealing head of the small pressure reducer piston is designed into a spherical shape.

Referring to fig. 2, the utility model also designs a large piston matched with the small piston, the middle part of the large piston is provided with a channel which is communicated from front to back, and the small piston is arranged in the channel of the large piston and can block the channel of the large piston.

Referring to fig. 3 and 4, the small piston with two sealing rings is installed in the channel of the large piston, when the small piston slides in the channel of the large piston, the two sealing rings become two fulcrums, so that the small piston shaft is overlapped with the large piston shaft, and the small piston does not swing. When the small piston is closed, the sealing surface of the ball head of the small piston and the tangent line of the sealing fillet of the large piston are always in a line, so that good sealing is kept on the same line; meanwhile, when the small piston is opened, the spherical arc surface at the head of the small piston is separated from the sealing fillet of the large piston from the tangent line, the distance between the tangent lines is always kept to be minimum, the two sides of the tangent line are smooth arc streamline-shaped curved surfaces, the airflow flux circulates according to the actual opening distance, the maximum flux of opening is kept, and meanwhile, the smooth arc streamline-shaped curved surfaces do not obstruct the airflow, so that the smooth airflow is larger.

The synthesis of the above: when the small piston is matched with the large piston, the small piston shaft and the large piston shaft can be kept coincident, and a sealing line is always kept well sealed on one tangent line when the small piston is closed. When the small piston is opened, the maximum flux of the opening can be kept, and the streamline-shaped curved surface of the ball head enables the smooth flow of the airflow to be larger. Thereby the pressure reducer has good performance and stability, and the breathing is more comfortable.

Claims

1. The utility model provides a take little piston of pressure reducer of two sealing washers and bulb which characterized in that: the cylindrical surface of the small piston is provided with at least two sealing ring grooves, sealing rings are arranged in the sealing ring grooves, and the end part of the small piston is spherical.

2. A large piston to be fitted with a pressure reducer small piston with a double seal ring and a ball head as claimed in claim 1, wherein: the middle part of the large piston is provided with a channel which is communicated from front to back, and the small piston is arranged in the channel of the large piston and can block the channel of the large piston.

3. The large piston as set forth in claim 2 wherein: the large piston shaft is coincided with the small piston shaft.