CN214789236U

CN214789236U - Gas leakage protection two-way valve for heat preservation furnace

Info

Publication number: CN214789236U
Application number: CN202120996806.6U
Authority: CN
Inventors: 于议; 张帅; 邵宇; 崔风友; 甘辉
Original assignee: Jiangsu Vocational College of Information Technology
Current assignee: Jiangsu Vocational College of Information Technology
Priority date: 2021-05-11
Filing date: 2021-05-11
Publication date: 2021-11-19
Anticipated expiration: 2031-05-11

Abstract

The utility model discloses a gas leakage protection two-way valve for holding furnace, including gland, sealing washer, support, base, guide pillar screw and spring. When the sealing device works, the high-pressure gas in the closed cavity is used for driving the gland with the bottom surface embedded with the sealing ring to be tightly attached to the end surface of the support, so that the closing and sealing are realized. In a non-working state, the gland is lifted away from the support under the action of the elastic force of the spring, namely, the gland returns to an opening state, and condensed water flows downwards along a gap between the outer surface of the gland and the blind hole in the support and is discharged through the first through hole. The utility model discloses the condition that make full use of differential pressure casting equipment's holding furnace had at work and non-operating condition makes gas leakage protection two-way valve structure succinct, and is sealed and sluicing function is reliable. The automatic work of one-time installation can adapt to high temperature environment, and especially gaseous high pressure double-acting self sealss technique guarantees sealed reliable, the drainage is timely, can guarantee the normal work of heat preservation stove, improves the pouring quality of work piece.

Description

Gas leakage protection two-way valve for heat preservation furnace

Technical Field

The utility model belongs to the valve field specifically is a gas leakage protection two-way valve for heat preservation stove.

Background

In the prior counter-pressure casting equipment, a holding furnace is a carrier for holding and conveying molten alloy, and the safe and reliable work of the holding furnace is particularly important for smooth casting. The heat preservation stove has the heat preservation function, and the inside arranges the heating resistor silk to external 380V three-phase power, the three-phase power supply cable is located the airtight cavity with heat preservation stove main part fixed connection with the interface that the heating resistor silk is connected. High-temperature high-pressure gas enters a closed chamber of the three-phase electric connector in the differential pressure casting work, the high-temperature high-pressure gas is condensed into water drops due to temperature reduction, and when the water drops are accumulated to submerge the three-phase electric connector, a circuit short circuit fault can occur, equipment is damaged, and even personal injury is caused.

The existing solution is to add a ball valve at the bottom of a three-phase electric interface closed chamber, manually open the ball valve at intervals in a non-working state to drain the internal condensed water, and then close the ball valve. But the manual operation is difficult to control accurately, and error omission is inevitable; and the temperature of the working environment reaches 70-100 ℃, the sealing property of the common ball valve is poor, so that gas leakage influences the pouring quality.

SUMMERY OF THE UTILITY MODEL

To the problem, an object of the utility model is to provide a gas leakage protection two-way valve for heat preservation stove for the airtight cavity of heat preservation stove three-phase electrical interface realizes automatic sealing at the during operation, and unoperated state realizes the function of automatic evacuation comdenstion water.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a gas leakage protection two-way valve for a heat preservation furnace comprises a gland, a sealing ring, a support, a base, a guide pillar screw and a spring; the support is fixed on the wall of the bottom of the closed chamber of the heat preservation furnace in a sealing manner, and a blind hole is formed in the support; the gland is positioned above the support and inside the closed cavity, and a sealing ring is embedded in the bottom surface of the gland; the base is fixedly connected to the bottom of the support and positioned outside the closed cavity, and a first through hole communicated with the blind hole is formed in the base; the gland is connected with the base through a guide pillar screw, and the gland is in sliding fit with the guide pillar screw; the bottom end of the spring is supported at the bottom of the blind hole, and the top end of the spring is supported at the bottom surface of the gland; the pressure in the closed cavity is normal pressure under the non-working state, the press cover is supported by the spring relative to the support at the moment, the press cover is in an open state, and condensed water flows down along a gap between the press cover and the support and is discharged through the first through hole; under the working state, the high-pressure gas in the sealed cavity compresses the gland downwards on the top surface of the support along the guide pillar screw, the gland is in a closed state, and the sealing ring is in contact with the top surface of the support to seal the high-pressure gas in the sealed cavity.

An annular dovetail groove is formed in the bottom surface of the gland, and an O-shaped sealing ring is embedded in the dovetail groove.

The opening angle of the dovetail groove is 30 degrees.

And a plurality of second through holes are uniformly formed in the top of the dovetail groove along the circumference of the dovetail groove.

The gland is made of aluminum.

The sealing ring is made of silicon rubber.

The utility model discloses following beneficial effect has:

the utility model provides a gas leakage protection two-way valve for heat preservation stove, the during operation utilizes the interior high-pressure gas drive executive component gland of airtight chamber to paste tightly with the support terminal surface and realizes closing sealedly, and the gland bottom surface is inlayed and is had the sealing washer, realizes the sealing to the interior high-pressure gas of airtight chamber. In a non-working state, the pressing cover of the actuating component is lifted away from the support under the action of the elastic force of the spring, namely, the pressing cover returns to an opening state, and condensed water flows downwards along a gap between the outer surface of the pressing cover and the blind hole in the support and is discharged through the first through hole. The utility model discloses the condition that make full use of differential pressure casting equipment's holding furnace had at work and non-operating condition makes gas leakage protection two-way valve structure succinct, and is sealed and sluicing function is reliable. The automatic work of one-time installation can adapt to high temperature environment, and especially gaseous high pressure double-acting self sealss technique guarantees sealed reliable, the drainage is timely, can guarantee the normal work of heat preservation stove, improves the pouring quality of work piece.

Furthermore, the utility model discloses reserve the dovetail that has the angle to be 30 in gland bottom, the sealing washer can inlay in the dovetail and not drop. The top of the dovetail groove is provided with a second through hole, high-pressure gas acts on the sealing ring through the second through hole reserved in the gland, the sealing ring is further tightly attached to the end face of the support, secondary sealing is achieved, and sealing performance is improved. The gland chooses for use the aluminium material, can lighten its weight, reduces the rigidity of spring, can guarantee certain rigidity again, makes the utility model discloses a gas leakage protection two-way valve reaction is sensitive. The sealing washer material chooses high temperature resistant silica gel material for use, can keep good sealing performance under higher operating temperature.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention.

In the drawings:

FIG. 1 is a schematic view of the overall structure of a holding furnace;

FIG. 2 is a partial enlarged view of the point I in FIG. 1, namely a sectional view of the gas leakage protection two-way valve for a holding furnace provided by the present invention;

in the figure, 1 is holding furnace main part, 2 is airtight cavity, 3 is cable interface, 4 is the utility model discloses a gas leakage protection two-way valve for holding furnace, 5 are the gland, 6 are the sealing washer, 7 are guide pillar screw, 8 are the spring, 9 are the support, 10 are the base, 11 are first through-hole, 12 are the blind hole, 13 are the dovetail, 14 are the second through-hole.

Detailed Description

The foregoing and other technical matters, features and effects of the present invention will be apparent from the following detailed description of the embodiments, which is to be read in connection with the accompanying drawings 1 to 2. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.

Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

The utility model provides a gas leakage protection two-way valve for heat preservation stove mainly solves the airtight cavity of heat preservation stove three-phase electric interface and realizes automatic sealing at the during operation, and unoperated state realizes the function of automatic evacuation comdenstion water.

As shown in figure 1, a holding furnace main body 1 is a crucible and a carrier of molten metal, and a closed chamber 2 and the holding furnace main body 1 are of an integrated structure and provide a closed space for connecting a resistance wire in the holding furnace with an external cable. The cable connection 3 is a connection for three-phase power, which is located at the very bottom and through which the condensate first flows and causes a short circuit.

As shown in FIG. 2, the gas leakage protection two-way valve for holding furnace of the present invention is composed of a basic part gland 5, a support 9, a base 10, a standard part sealing ring 6, a guide post screw 7 and a spring 8. The support 9 is fixed on the wall of the bottom of the closed chamber 2 of the holding furnace in a sealing way; the gland 5 is positioned above the support 9, and the gland 5 is positioned in the closed cavity 2; the base 10 is fixedly connected to the bottom of the support 9, and the base 10 is located outside the closed chamber 2 and connected to the atmosphere. The gland 5 is connected with the base 10 through the guide post screw 7, and the gland 5 is in sliding fit with the guide post screw 7. The support 9 is provided with a blind hole 12. The bottom end of the spring 8 is supported at the bottom of the blind hole 12, and the top end of the spring 8 is supported at the bottom surface of the gland 5. The base 10 is provided with a first through hole 11 communicated with the blind hole 12. The bottom surface of the gland 5 is provided with a 30-degree annular dovetail groove 13; the O-shaped sealing ring 6 is embedded in the dovetail groove 13; the top of the dovetail groove 13 is uniformly provided with a plurality of second through holes 14 along the circumference.

The working principle of the utility model is as follows.

When the holding furnace is in a non-working state, high-pressure gas does not exist in the holding furnace main body 1 and the closed chamber 2, and the interiors of the holding furnace main body and the closed chamber are communicated with the outside atmosphere, namely the pressure is equal to the atmospheric pressure. The gland 5 is connected with the base 10 through the guide post screw 7, the gland 5 is in sliding fit with the guide post screw 7, and at the moment, the gland 5 moves downwards along the guide post screw 7 under the action of gravity. The bottom end of the spring 8 is supported at the bottom of the blind hole of the support 9, the top end of the spring is supported at the bottom surface of the gland 5, the gland 5 is supported by the spring 8 relative to the support 9 and is in an open state, so that condensed water flows down along a gap formed between the outer circle surface of the gland 5 and the surface of the blind hole of the support 9, and is discharged through a first through hole 11 reserved on the base 10 at the bottom of the blind hole 12.

When the holding furnace is in a working state, high-pressure gas is filled in the holding furnace main body 1 and the closed chamber 2, and the internal pressure of the holding furnace main body and the closed chamber is 6bar and is 1bar higher than the atmospheric pressure of the external environment. The air pressure born by the upper surface and the lower surface of the flange of the gland 5 is the same, but the pressure action area of the upper surface is larger than that of the lower surface, so that pressure difference is generated, the pressure difference overcomes the elasticity of the spring 8, the gland 5 moves downwards along the guide post screw 7 until the bottom surface of the flange of the gland 5 is contacted with the top surface of the support 9, and the gland 5 is in a closed state at the moment.

In order to ensure the sealing of high-pressure gas in the closed chamber 2 under the working state, a sealing ring 6 embedded on the bottom surface of a flange of a gland 5 is contacted with the top surface of a support 9 to realize primary sealing, meanwhile, second through holes 14 are uniformly distributed on the top of a dovetail groove 13 along the circumference of the dovetail groove, and the high-pressure gas presses the sealing ring 6 through the second through holes 14 to ensure that the sealing ring 6 is tightly attached to the end surface of the support 9 to realize secondary sealing, namely, the gas high-pressure double-acting self-sealing technology, and the reliable sealing of the high-pressure gas in the closed chamber 2 is realized under the action of twice high pressure.

Additionally, the utility model discloses a sealing washer is inlayed and is prevented breaking away from the technique, opens 30 dovetail 13 in gland 5 bottom surfaces promptly, inlays 6 embedding dovetails with O type sealing washer, can prevent that gland 5 from being fallen by sealing washer 6 when spring 8 upwards backs down.

Because the temperature is higher when the heat preservation stove is working, and the heat that gives off to the outside is also more, consequently sealing washer 6 material chooses the silicon rubber, and silicon rubber is high temperature resistant and elasticity is good.

In order to make the utility model discloses a gas leakage protection two-way valve reaction for holding furnace is sensitive, and the rigidity of minimize spring 8 consequently will alleviate the weight of executive component gland 5, still need to guarantee simultaneously that gland 5 has certain rigidity, consequently chooses for use the aluminium material to make gland 5.

The utility model discloses the condition that make full use of differential pressure casting equipment's holding furnace had at work and non-operating condition makes gas leakage protection two-way valve structure succinct, and is sealed and sluicing function is reliable. The automatic work of one-time installation can adapt to high temperature environment, and especially gaseous high pressure double-acting self sealss technique guarantees sealed reliable, the drainage is timely, can guarantee the normal work of heat preservation stove, improves the pouring quality of work piece.

The present invention has been described in further detail with reference to the specific embodiments, which should not be construed as limiting the present invention; to the utility model discloses affiliated and relevant technical field's technical personnel are based on the utility model discloses under the technical scheme thinking prerequisite, the extension of doing and the replacement of operating method, data all should fall within the utility model discloses within the protection scope.

Claims

1. The utility model provides a gas leakage protection two-way valve for heat preservation stove which characterized in that: comprises a gland (5), a sealing ring (6), a support (9), a base (10), a guide post screw (7) and a spring (8); the support (9) is fixed on the wall of the bottom of the closed chamber (2) of the heat preservation furnace in a sealing manner, and the support (9) is provided with a blind hole (12); the gland (5) is positioned above the support (9), the gland (5) is positioned in the closed cavity (2), and a sealing ring (6) is embedded in the bottom surface of the gland (5); the base (10) is fixedly connected to the bottom of the support (9), the base (10) is positioned outside the closed chamber (2), and a first through hole (11) communicated with the blind hole (12) is formed in the base (10); the gland (5) is connected with the base (10) through a guide post screw (7), and the gland (5) is in sliding fit with the guide post screw (7); the bottom end of the spring (8) is supported at the bottom of the blind hole (12), and the top end of the spring (8) is supported at the bottom surface of the gland (5); the pressure in the closed chamber (2) is normal pressure in a non-working state, the gland (5) is propped up relative to the support (9) by the spring (8), the gland (5) is in an open state, and condensed water flows down along a gap between the gland (5) and the support (9) and is discharged through the first through hole (11); under the working state, high-pressure gas in the closed cavity (2) presses the gland (5) downwards on the top surface of the support (9) along the guide post screw (7), the gland (5) is in a closed state, and the sealing ring (6) is in contact with the top surface of the support (9) to seal the high-pressure gas in the closed cavity (2).

2. The gas leakage protection bi-directional valve for a holding furnace of claim 1, wherein: an annular dovetail groove (13) is formed in the bottom surface of the gland (5), and an O-shaped sealing ring (6) is embedded in the dovetail groove (13).

3. The gas leakage protection bi-directional valve for a holding furnace of claim 2, wherein: the opening angle of the dovetail groove (13) is 30 degrees.

4. The gas leakage protection two-way valve for holding furnace of claim 2 or 3, wherein: and a plurality of second through holes (14) are uniformly formed in the top of the dovetail groove (13) along the circumference of the dovetail groove.

5. The gas leakage protection bi-directional valve for holding furnace of any one of claims 1-3, wherein: the gland (5) is made of aluminum.

6. The gas leakage protection bi-directional valve for holding furnace of any one of claims 1-3, wherein: the sealing ring (6) is made of silicon rubber.