CN113028098A

CN113028098A - Automatic gas discharge valve

Info

Publication number: CN113028098A
Application number: CN202011550449.7A
Authority: CN
Inventors: 斋藤功
Original assignee: Sintokogio Ltd
Current assignee: Sintokogio Ltd
Priority date: 2019-12-25
Filing date: 2020-12-24
Publication date: 2021-06-25
Anticipated expiration: 2040-12-24
Also published as: JP2021102974A; JP7238762B2; CN113028098B

Abstract

Provided is an automatic gas discharge valve capable of reliably performing valve opening and closing operations with a simple structure. A valve main body (2); a valve seat chamber (3) provided in the valve main body (2); a first pipe (5) extending upward from below and having an upper end opening to the valve seat chamber (3) and a valve seat (4) at the opening; a second pipe (6) extending obliquely from the lower side to the upper side and having an upper end communicating with the valve seat chamber (3); and a ball (8) which is disposed so as to be movable from the inside of the second pipe (6) to the valve seat chamber (3), is sucked when the inside of the first pipe (5) becomes negative pressure, and abuts against the valve seat (4) to close the opening, and is lowered by gravity in the second pipe (6) and moved downward when the inside of the first pipe (5) becomes atmospheric pressure, so that the second pipe (6) communicates with the first pipe (5) via the valve seat chamber (3).

Description

Automatic gas discharge valve

Technical Field

The present invention relates to an automatic gas discharge valve.

Background

In a dust collector that collects dust generated in a working environment, there is a case where combustible gas is accumulated in a housing during the dust collection. For example, in a wet dust collector for collecting aluminum dust, hydrogen gas is generated by the reaction of water and aluminum powder in the dust collection process. In a dry dust collector for treating coal dust, methane gas, acetylene gas, and the like may be accumulated inside a casing. Since there is a risk of explosion in a state where these flammable gases are retained inside the housing, a mechanism for releasing these flammable gases to the outside is required during the stop of the apparatus. Moreover, the release is preferably performed automatically.

Patent document 1 discloses an automatic gas discharge valve conceived in accordance with the needs as described above. The automatic gas discharge valve includes a spherical valve body that automatically opens and closes a gas discharge port that opens at the uppermost portion of the device body. The ball valve element is normally supported by an elastic body in a state in which the exhaust port is opened, and when the apparatus main body side becomes a negative pressure due to the start of operation and a suction action is generated to the exhaust port, the elastic body is sucked while being extended by the suction action to block the exhaust port.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open No. 2003-222256

Disclosure of Invention

However, in the automatic gas discharge valve disclosed in cited document 1, since the spherical valve body that performs opening and closing operations with respect to the exhaust port is supported by the elastic body, a large negative pressure equal to or greater than a certain level is required to sufficiently suck the spherical valve body against the exhaust port to block the exhaust port. Therefore, depending on the type and state of operation of the dust collector, a sufficiently large negative pressure may not be obtained, and the exhaust port may not be blocked. Further, since the elastic body deteriorates its characteristics with time, there is a possibility that the opening and closing operation of the exhaust port may not be performed when the elastic body is loosened or broken. In order to avoid such a deteriorated state, maintenance is periodically performed, and a valve or the like is replaced due to deterioration of the elastic body, which may take time and labor for preparation.

The present invention has been made in view of the above circumstances, and an object thereof is to provide an automatic gas discharge valve capable of reliably performing an opening and closing operation of the valve with a simple configuration.

In order to solve the above-described problems, the present invention adopts the following aspects.

That is, the automatic gas discharge valve of the present invention includes: a valve body; a valve seat chamber provided in the valve main body; a first pipe extending upward from below, having an upper end portion opened to the valve seat chamber, and having a valve seat as the opened portion; a second pipe extending obliquely upward from below, the second pipe having an upper end communicating with the valve seat chamber; and a ball disposed to be movable from the inside of the second pipe to the valve seat chamber, sucked and brought into contact with the valve seat to close the opening when the inside of the first pipe becomes a negative pressure, and dropped by gravity from the inside of the second pipe and moved downward to communicate the second pipe with the first pipe via the valve seat chamber when the inside of the first pipe becomes an atmospheric pressure.

According to the present invention, since the ball moves between the inclined second pipe line and the valve seat in accordance with the pressure in the first pipe line, it is possible to realize the automatic gas discharge valve capable of reliably performing the opening and closing operation of the valve with a simple configuration.

In one aspect of the present invention, the ball valve further includes a third pipe line extending upward from the valve seat chamber, an upper end portion of the third pipe line being open to the atmosphere, and the ball, when positioned below the second pipe line, causes the third pipe line to communicate with the first pipe line via the valve seat chamber.

According to this configuration, when the ball is positioned below the second pipe, the third pipe communicates with the first pipe, and therefore, gas can be efficiently discharged.

In one aspect of the present invention, the valve body is subjected to antistatic treatment.

According to this configuration, since the valve body is subjected to the antistatic treatment, it is possible to prevent the generation of the electrostatic spark due to the electrification of the gas discharge valve.

In one aspect of the present invention, the first line, the second line, and the third line are provided in a valve body, and at least a portion of the valve body forming the valve seat chamber is formed of a transparent or translucent material.

According to this configuration, since the portion forming the valve seat chamber is formed of a transparent or translucent material, the open/close state of the gas discharge valve can be visually confirmed.

In one aspect of the present invention, the valve body is formed with a drain hole below a wall portion forming the valve seat chamber.

According to this configuration, since the drain hole is formed below the wall portion forming the valve seat chamber, the water condensed in the gas discharge valve can be discharged to the outside.

In one aspect of the present invention, the valve body includes an extension pipe line that opens to the outside on an extension line of either one or both of the first pipe line and the second pipe line, and a screw is detachably screwed to an opening portion of the extension pipe line that opens to the outside.

According to such a configuration, since the extension line of the first conduit and/or the second conduit includes the extension conduit which opens to the outside, and the opening of the extension conduit is normally closed by the screw, the inside of the valve main body can be easily cleaned by removing the screw.

According to the present invention, it is possible to provide an automatic gas discharge valve capable of reliably performing an opening/closing operation of the valve with a simple configuration.

Drawings

Fig. 1 is a perspective view of an automatic gas discharge valve according to an embodiment of the present invention.

Fig. 2 is a side view of an automatic gas discharge valve according to an embodiment of the present invention.

Fig. 3 is a perspective view of a wet dust treatment chamber to which an automatic gas discharge valve according to an embodiment of the present invention is attached.

Fig. 4 is a front view of the wet dust treatment chamber to which the automatic gas discharge valve according to the embodiment of the present invention is attached.

Fig. 5 is an enlarged view of a main part of a wet dust processing chamber to which an automatic gas discharge valve according to an embodiment of the present invention is attached.

Description of the symbols

1 automatic gas discharge valve

2 valve body

221 side plate hole (Drain hole)

3 valve seat chamber

4 valve seat

5 first pipeline

52 extension of the first line

53 opening of extension pipe of first pipe

54 screw for extending first pipeline

6 second pipeline

62 extension of the second line

63 opening of extension pipe of second pipe

64 screw of extension line of second line

7 third pipeline

8 spheres.

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

Fig. 1 is a perspective view illustrating an automatic gas discharge valve according to an embodiment of the present invention, and fig. 2 is a side view illustrating the automatic gas discharge valve according to the embodiment of the present invention.

The automatic gas discharge valve 1 of the present embodiment is configured such that a valve chamber 3, a first pipe line 5 including a valve seat 4, a second pipe line 6, and a third pipe line 7 are provided in a valve main body 2, and a ball 8 is disposed in the second pipe line 6.

The first pipe line 5 extends upward from a first opening 51 provided in a bottom portion (lower portion) 211 of the valve main body 2, and an upper end portion thereof is opened to the valve seat chamber 3, and the opened portion is the valve seat 4. The second pipe 6 extends obliquely upward from a second opening 61 provided in a side surface 213 of the valve main body 2, and has an upper end communicating with the valve seat chamber 3. The third pipe passage 7 extends upward from the valve seat chamber 3, and an upper end portion thereof communicates with a third opening 71 opened to the atmosphere.

The ball 8 is configured to be movable from the second pipe 6 to the valve seat chamber 3, sucked and brought into contact with the valve seat 4 to close the opening when the first pipe 5 becomes a negative pressure, and the ball 8 falls by gravity from the second pipe 6 and moves downward to communicate the second pipe 6 and the third pipe 7 with the first pipe 5 via the valve seat chamber 4 when the first pipe 5 becomes an atmospheric pressure.

The valve body 2 is composed of a valve structure 21 and side plates 22, the valve structure 2 is formed by a plate body made of an aluminum alloy having a predetermined thickness dimension into a substantially rectangular shape, and the

side plates

22, 22 are disposed so as to sandwich the valve structure 21 from both sides.

Holes

23, 24 are formed in the valve structure 21 perpendicularly to the paper surface of fig. 2, holes are formed in the

side plates

22, 22 at the same positions as the

holes

23, 24, and the

side plates

22, 22 are fixed to the valve structure 21 by

screws

25, 26 and

nuts

27, 28 that are attached through the holes formed and the

holes

23, 24 of the valve structure 21. Here, the hole 24 is provided in the vicinity of the first opening 61 of the second pipe 6, and the ball 8 is held in the second pipe 6 by attaching the screw 26 to the valve main body 2 by the nut 28.

The bottom 211 of the valve structure 21 is provided with

screw holes

212 and 212, and the screw holes 212 and 212 are used to attach the automatic gas discharge valve 1 to a wet dust processing chamber described later. The valve structure 21 is mounted in the wet dust processing chamber by

screw holes

212 and 212 deeply provided in the valve structure 21, and therefore, the automatic gas discharge valve 1 can be grounded in a housing of the wet dust processing chamber or the like. Therefore, the electrostatic prevention measure (treatment) can be performed.

The

side plates

22, 22 are formed of a transparent or translucent material such as an acrylic plate. In the present embodiment, the

side plates

22, 22 are formed of acrylic plates. The valve seat chamber 3 is formed by opening an elliptical hole 31 in the valve structure 21 perpendicular to the paper surface of fig. 2, and by sandwiching the hole 31 from both sides by

side plates

22, 22 formed of transparent acrylic plates, and closing the hole. Therefore, the ball 8 is configured to be able to visually confirm whether or not the valve seat 4 is closed from the outside.

Further, holes 221, 221 are formed below portions of the

side plates

22, 22 constituting the wall portion of the valve seat chamber 3. The

holes

221 and 221 function as drain holes for discharging water droplets generated by condensation of water vapor to the outside in the valve seat chamber 3.

The valve main body 2 includes

extension pipe lines

52, 62, the

extension pipe lines

52, 62 are opened to the outside along extension lines of both the first pipe line 5 and the second pipe line 6, and screws 54, 64 are detachably screwed to openings 53, 63 of the

extension pipe lines

52, 62, which are opened to the outside.

Next, a wet dust processing chamber to which the automatic gas discharge valve 1 of the present embodiment is attached will be described with reference to fig. 3, 4, and 5.

Fig. 3 is a perspective view of the wet dust treatment chamber to which the automatic gas discharge valve of the present embodiment is attached. Fig. 4 is a front view as viewed from the direction of arrow a in fig. 3. Fig. 5 is a partially enlarged view of the automatic gas discharge valve 1 of the present embodiment mounted thereon. The wet dust treatment chamber 10 is attached to a dust collector for keeping clean the environment of a work site where aluminum powder and the like are generated, and separates dust such as aluminum powder from air as described later.

Referring to fig. 3 and 4, wet dust treatment chamber 10 has inlet pipe 11 and exhaust pipe 12 provided in its housing 100. A reservoir tank 13 for storing the makeup water W is provided inside the casing 100, a discharge valve 14 for discharging the makeup water W is provided at the bottom of the reservoir tank 13, and a discharge tank 15 for receiving the discharged makeup water W is disposed below the discharge valve 14. An introduction pipe 19 is provided inside the casing 100, and the introduction pipe 19 extends downward from the introduction pipe 11 toward the surface of the makeup water W.

An explosion diffusion cover 16 and a diffusion duct 17 are provided at an upper portion of the housing 100, and the diffusion duct 17 covers the explosion diffusion cover 16 and has an opening at an upper portion. The automatic gas discharge valve 1 (fig. 5) of the present embodiment is provided on the uppermost part 18 of the housing 100.

When the wet dust treatment chamber is in a stopped state, the inside of the housing 100 is opened to the atmospheric pressure. In this state, the ball 8 of the automatic gas discharge valve 1 of fig. 2 is free to fall due to the inclination of the second pipe 6 and is located at the position of the broken line S supported by the lower screw 26 inside the second pipe 6. The ball 8 is separated from the seat 4, the first pipe 5 communicating with the inside of the housing 100 is opened to the atmospheric pressure, and the first pipe 5, the second pipe 6, and the third pipe 7 communicate with each other through the seat chamber 3. That is, the automatic gas discharge valve 1 is in an open state.

When the wet dust treatment chamber 10 is operated, the exhaust pipe 12 is sucked by an external fan (not shown) to bring the inside of the housing 100 into a negative pressure state. In the automatic gas discharge valve 1 of fig. 2, the first pipe line 5 is brought into a negative pressure by communication with the housing 100, and the ball 8 is sucked to the valve seat 4 by the negative pressure and moved to a position indicated by a two-dot chain line T in contact with the valve seat 4. In this state, the valve seat 4 of the first pipe line 5 is closed by the ball 8, and the first pipe line 5 is not communicated with the second pipe line 6 and the third pipe line 7. That is, the automatic gas discharge valve 1 is in the closed state. Therefore, when the wet dust processing chamber 10 is operated, the automatic gas discharge valve 1 normally operates the wet dust processing chamber 10 without breaking the negative pressure in the housing 100.

When wet dust treatment chamber 10 is in operation, air from the working environment in which the powdery aluminum is mixed from introduction pipe 11 is introduced as indicated by arrow p in fig. 3 by the negative pressure of casing 100. As indicated by an arrow d in fig. 4, the air mixed with the powdery aluminum introduced into the introduction pipe 11 is guided to the storage tank 13 located below the casing 100 through the introduction pipe 19. The air guided to the storage tank 13 comes into contact with the makeup water W, and the aluminum powder mixed in the air is replenished to the makeup water W and purified. The purified air is guided to the upper portion of the casing 100 as indicated by an arrow u, and is discharged from the exhaust pipe 12 as indicated by an arrow q in fig. 3.

When the wet dust treatment chamber 10 is stopped, the suction from the exhaust pipe 12 is stopped, and the interior of the housing 100 is opened to the atmosphere again. The first pipe 5 of the automatic gas discharge valve 1 shown in fig. 2, which communicates with the housing, is opened to the atmosphere, and therefore, the ball 8 is not sucked to the valve seat 4 by the negative pressure, but falls down by gravity by the inclination of the second pipe 6, and returns again to the position of the broken line S supported by the lower screw 26 in the second pipe 6.

As described above, the automatic gas discharge valve 1 of the present embodiment employs a mechanism for opening and closing the valve by utilizing the inclination of the second pipe 6, the negative pressure of the first pipe 5, and the atmospheric pressure, and therefore, it is possible to realize an automatic gas discharge valve that reliably performs the valve opening and closing operation with a simple structure without using an active mechanism such as a motor. Further, since the valve structure does not use a member which is deteriorated like an elastic member, the durability of the valve as a device is high, and the maintenance and inspection at the time of use is also simple.

Since the valve main body 2 takes the antistatic measure, safety can be ensured even in an environment where a combustible gas is generated without generating an electrostatic spark. When the valve is opened, the first pipe line 5 communicating with the casing 100 extends upward from the valve seat chamber 3 via the valve seat chamber 3, and the upper end portion communicates with the third pipe line 7 opened to the atmosphere, so that the hydrogen gas generated by contact between the aluminum powder and water in the casing 100 can be efficiently discharged to the outside of the casing 100. Further, since there is a gap between the wall surface of the second conduit 6 and the ball 8, hydrogen gas can be discharged from the gap.

Since the portion of the valve seat chamber 3 forming the valve seat chamber is formed of a transparent or translucent material and whether or not the ball 8 abuts against the valve seat 4 can be visually confirmed, the operating state of the apparatus can be easily observed. Since the drain hole 221 is provided below the valve seat chamber 3 and water condensed in the valve main body 2 is naturally drained to the outside, cleaning for draining water from the valve main body 2 is not required. Further, since the

extension pipes

52 and 62 that open to the outside on both extension lines of the first pipe line 5 and the second pipe line 6 are included, and the

screws

54 and 64 are detachably screwed to the openings 53 and 63 of the

extension pipes

52 and 62 that open to the outside, the inside of the valve main body 2 can be easily cleaned by detaching the

screws

54 and 64, and the routine maintenance and inspection can be simplified. Further, although an insertion-type plug may be used instead of the screw, the use of the screw has an effect that the component is not easily scattered even when a positive pressure is applied to the wet dust treatment chamber.

In the above embodiment, the two

cleaning extension pipes

52 and 62 are provided, but either one may be adopted. The valve structure 21 is made of an aluminum alloy, but is not limited thereto, and any material may be used as long as it can prevent electrification.

In the present embodiment, the third pipeline 7 is provided, but the present invention is not limited to this, and the present invention can exhibit a sufficiently useful effect even if the third pipeline 7 is not provided. That is, it is possible to realize an automatic gas discharge valve capable of reliably performing an opening/closing operation of the valve with a simple configuration.

Claims

1. An automatic gas vent valve, comprising:

a valve body;

a valve seat chamber disposed within the valve body;

a first pipe extending upward from below, an upper end portion of the first pipe being open to the valve seat chamber, and a portion of the opening being a valve seat;

the second pipeline extends obliquely from the lower part to the upper part, and the upper end of the second pipeline is communicated with the valve seat chamber; and

a ball disposed to be freely movable from inside the second pipe to the valve seat chamber, sucked and brought into contact with the valve seat to close the opening when the inside of the first pipe is at a negative pressure, and dropped by gravity and moved downward in the second pipe to communicate the second pipe with the first pipe via the valve seat chamber when the inside of the first pipe is at an atmospheric pressure.

2. The automatic gas vent valve of claim 1, comprising:

and a third pipe line extending upward from the valve seat chamber, an upper end portion of the third pipe line being open to the atmosphere, and the third pipe line being communicated with the first pipe line via the valve seat chamber when the ball is positioned below the second pipe line.

3. The automatic gas vent valve of claim 2,

the valve body is subjected to antistatic treatment.

4. The automatic gas vent valve of claim 2 or 3,

the first, second, and third lines are disposed within a valve body, and at least a portion of the valve body forming the valve seat chamber is formed of a transparent or translucent material.

5. The automatic gas vent valve of any one of claims 1 to 4,

the valve body is formed with a drain hole below a wall portion forming the valve seat chamber.

6. The automatic gas vent valve of any one of claims 1 to 5,

the valve body includes an extension pipe line that opens to the outside on an extension line of either one or both of the first pipe line and the second pipe line, and a screw is detachably screwed into an opening portion of the extension pipe line that opens to the outside.