CN219413655U

CN219413655U - Bidirectional gas protection device

Info

Publication number: CN219413655U
Application number: CN202223608916.4U
Authority: CN
Inventors: 冯华; 韩锋; 张磊
Original assignee: Taiyuan Aero Instruments Co Ltd
Current assignee: Taiyuan Aero Instruments Co Ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-07-25
Anticipated expiration: 2032-12-30

Abstract

The utility model discloses a bidirectional gas protection device, wherein a valve port combination (5) is screwed on a corresponding thread of a valve body combination (6) through threads on an outer shaft surface, a second spring (7) is placed on a corresponding installation position of the valve port combination (5), a long rod of a tray (8) penetrates into a middle hole of the valve port combination (5), the long rod is fastened by a screw (2), a rubber diaphragm (9) is arranged on the valve body combination (6), a gland (10) is used for pressing, an inner thread of an upper cover (11) is screwed and fixed with the valve body combination (6), a vulcanized rubber ring of the valve combination (4) is aligned with a ring groove of the valve port combination (5), one end of a first spring (3) is placed in the groove of the valve combination (4), and the other end of the first spring (3) is placed in the groove of a spring seat (1). The spring seat (1) is screwed on the corresponding thread of the valve body assembly (6) through the thread of the outer shaft surface. The device has compact structure and bidirectional overvoltage protection function.

Description

Bidirectional gas protection device

Technical Field

The utility model belongs to the technical field of pressure maintenance, and particularly relates to a bidirectional gas protection device which is used for protecting the pressure of an airtight space in a weightless environment.

Background

There is a need in the art for pressure protection of airtight spaces in weightless environments. When the pressure of the airtight space changes, the valve is reliably driven to be rapidly opened and closed by the mechanical pressure sensing assembly, so that different airtight spaces are isolated or communicated, and the stability of the internal pressure of the airtight space is ensured. However, no device capable of reliably and rapidly isolating or communicating different airtight spaces and guaranteeing the stability of the internal pressure of the airtight spaces exists at present.

Disclosure of Invention

In view of the foregoing circumstances of the prior art, an object of the present utility model is to provide a bidirectional gas protection device for pressure protection of an airtight space in a weightless environment.

The above object of the present utility model is achieved by the following technical solutions:

the utility model provides a two-way gas protection device, including the spring holder, the screw, first spring, the valve combination, the valve port combination, the valve body combination, the second spring, the tray, the rubber diaphragm, gland and upper cover, wherein the valve port combination screws in the corresponding screw thread department of valve body combination through the screw thread of outer axial face, the second spring is placed in the corresponding installation department of valve port combination, the stock of tray penetrates the centre bore of valve port combination, fasten with the screw, the rubber diaphragm is packed into on the valve body combination, compress tightly with the gland, rely on the internal thread of upper cover to screw fixedly with the valve body combination, the vulcanized rubber ring of valve combination aligns the annular of valve port combination, the recess of valve combination is put into to first spring one end, the recess of spring holder is placed to the other end, the spring holder screws in the corresponding screw thread department of valve body combination through the screw thread of outer axial face.

The device has compact structure and bidirectional overvoltage protection function.

Drawings

Fig. 1 is a schematic structural view of a bidirectional gas protection device of the present utility model.

Detailed Description

The present utility model will be further described in detail with reference to the drawings and examples for more clearly understood objects, technical solutions and advantages of the present utility model.

The bidirectional gas protection device has higher tightness and sensitivity, and the structural schematic diagram is shown in figure 1. As shown in the figure, the bidirectional gas protection device comprises a spring seat 1, a screw 2, a first spring 3, a valve assembly 4, a valve port assembly 5, a valve body assembly 6, a second spring 7, a tray 8, a rubber diaphragm 9, a gland 10 and an upper cover 11, wherein the valve port assembly 5 is screwed on the corresponding screw thread of the valve body assembly 6 through the screw thread of an outer shaft surface, the second spring 7 is placed on the corresponding installation position of the valve port assembly 5, a long rod of the tray 8 penetrates into the middle hole of the valve port assembly 5 and is fastened by the screw 2, the rubber diaphragm 9 is arranged on the valve body assembly 6 and is tightly pressed by the gland 10, the vulcanized rubber ring of the valve assembly 4 is screwed and fixed with the valve body assembly 6 by virtue of the inner screw thread of the upper cover 11, one end of the first spring 3 is placed in the groove of the valve assembly 4, and the other end of the first spring 3 is placed in the groove of the spring seat 1. The spring seat 1 is screwed on the corresponding screw thread of the valve body combination 6 through the screw thread of the outer shaft surface. The respective components are further described below.

As shown in the figure, a long and narrow opening is arranged on a threaded surface of the spring seat 1, a threaded hole is arranged at one end of the end surface, and the threads are fixedly locked through a locking screw; and meanwhile, a tool slot hole is formed in the side, and the spring seat is screwed in and selected through a special tool for adjustment.

The spring seat 1 is provided with a spring fixing seat at the other end of the end surface, precompression of the first spring 3 is realized in a threaded screwing-in and screwing-out mode, and the orifice is arranged in a circular arc transitional connection mode.

The end face of the screw 2 is set to be a flat end face, and after the position is adjusted properly, the screw is fastened by glue solution.

The first spring 3 and the second spring 7 are compression spring structures with two ends being tightly coiled and ground flat.

The valve assembly 4 is provided with a spring fixing seat at one end of the end face, vulcanized rubber is arranged at the other end of the end face, the sealing requirement is met, and the middle part is of a hollow structure.

One end of the end face of the valve port combination 5 is designed into a right trapezoid ring groove structure, and the ring groove structure is contacted with the vulcanized rubber face of the valve combination under the action of spring force, so that the sealing can be kept.

The middle hole of the valve port combination 5 is adhered with a polytetrafluoroethylene lining, so that the long rod of the tray 8 can slide in the middle hole of the valve port combination 5.

One end of the valve body combination 6 is provided with a plurality of air passage openings, the other end is also provided with a plurality of air passage openings, and a conducting passage is formed in the structural cavity so as to be beneficial to gas introduction.

One end of the valve body combination 6 is provided with a ring groove for placing an O-shaped rubber ring, and the other end is provided with a ring groove for placing a rubber diaphragm for sealing.

One end of the end face of the tray 8 is provided with a spring fixing seat and a movable long rod, and the other end of the end face is provided with a circular arc-shaped supporting surface.

The profile of the rubber diaphragm 9 is provided with a circle of circular arc ring grooves, so that the required displacement index can be met.

One end of the end face of the gland 10 is provided with a circle of arc compression ring, and the compression ring structure presses the contact surface of the rubber membrane sheet under the action of pre-compression force, so that the sealing can be kept. The other end of the end face is provided with a plurality of gas path openings so as to facilitate gas introduction.

The upper cover 11 is of a hollow structure, one or two ring grooves for placing O-shaped rubber rings are arranged on the inner wall, and threaded holes are formed in the ring grooves and are used for being combined with the valve body to be screwed and fixed. The side surface of the upper cover is provided with an air guide passage which can be communicated with the outside air.

And under normal working conditions, the valve is normally closed. The pre-tightening spring ensures the tightness of the valve body.

When the residual pressure in the cavity of the bidirectional gas protection device is continuously increased, the gradually increased pressure generates acting force on the rubber diaphragm to enable the rubber diaphragm to bend downwards, the pressure acts on the tray to enable the tray rod to displace downwards, and the first spring is compressed until the tray rod moves downwards until contacting the bottom of the valve combination cavity. During this process, the valve of the bi-directional gas shield remains closed at all times. When the residual pressure in the cavity of the bidirectional gas protection device is continuously increased, the tray rod contacted with the bottom of the cavity of the valve assembly compresses the first spring and the second spring simultaneously, and after the adhesive effect of the valve port and the sealing rubber part of the valve assembly when the valve is about to be opened is overcome, the bidirectional gas protection device is opened to be communicated with the outside, and internal gas is discharged outwards.

When the external residual pressure is continuously increased, the residual pressure acts on the sealing rubber part of the valve assembly to squeeze the second spring, and when the external residual pressure reaches a specified value, the acting force overcomes the elastic force of the second spring, so that the bidirectional gas protection device is automatically opened to be communicated with the outside, and the outside gas enters.

Claims

1. A bidirectional gas protection device is characterized by comprising a spring seat (1), a screw (2), a first spring (3), a valve assembly (4), a valve port assembly (5), a valve body assembly (6), a second spring (7), a tray (8), a rubber diaphragm (9), a gland (10) and an upper cover (11), wherein the valve port assembly (5) is screwed at corresponding screw threads of the valve body assembly (6) through threads of an outer shaft surface, the second spring (7) is placed at corresponding installation positions of the valve port assembly (5), a long rod of the tray (8) penetrates into a middle hole of the valve port assembly (5), the long rod is fastened by the screw (2), the rubber diaphragm (9) is installed on the valve body assembly (6), the valve body assembly is tightly pressed by the gland (10), a vulcanized rubber ring of the valve assembly (4) is screwed and fixed with the valve body assembly (6) through inner threads of the upper cover (11), one end of the first spring (3) is placed in a groove of the valve assembly (4), and the other end of the first spring (3) is placed in the groove of the valve seat (1) through corresponding screw threads of the valve body assembly (6).

2. The bidirectional gas protection device according to claim 1, wherein one end of the end face of the valve port assembly (5) is a right trapezoid ring groove structure, and the ring groove structure is contacted with the vulcanized rubber face of the valve assembly (4) under the action of spring force.

3. The bi-directional gas shield of claim 1 wherein the central aperture of said valve port assembly (5) is bonded with a polytetrafluoroethylene lining to facilitate sliding movement of the elongated rod of the tray (8) within the aperture.

4. A bi-directional gas protection device according to claim 1, wherein the valve body assembly (6) is provided with a plurality of gas passage openings at one end and a plurality of gas passage openings at the other end, and a conducting passage is formed in the structural cavity to facilitate gas introduction.

5. A bi-directional gas shield according to claim 1, wherein the rubber diaphragm (9) profile is provided with a circle of circular arc grooves to meet the required displacement index.

6. The bidirectional gas protection device according to claim 1, wherein one end of the end face of the gland (10) is provided with a circle of circular arc compression ring, the compression ring structure presses the contact surface of the rubber diaphragm (9) under the action of pre-pressure, and the other end of the end face of the gland (10) is provided with a plurality of gas passage openings for facilitating gas introduction.

7. The bi-directional gas shield apparatus as set forth in claim 1, wherein the upper cover (11) is provided at a side thereof with a gas guide passage communicating with the outside air.