CN113028098B

CN113028098B - Automatic gas exhaust valve

Info

Publication number: CN113028098B
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: 2024-02-09
Anticipated expiration: 2040-12-24
Also published as: JP2021102974A; JP7238762B2; CN113028098A

Abstract

An automatic gas discharge valve capable of reliably performing opening and closing operations of the valve with a simple structure is provided. A valve body (2); a valve seat chamber (3) provided in the valve body (2); a first pipe (5) extending from the lower direction to the upper end of the valve seat chamber (3), wherein the open part is a valve seat (4); a second pipe (6) extending obliquely upward from the lower direction, the upper end of which communicates with the valve seat chamber (3); and a ball (8) which is arranged to be freely moved from the second pipe (6) to the valve seat chamber (3), sucked when the pressure in the first pipe (5) is negative, and is abutted against the valve seat (4) to seal the opening, and which is arranged to be dropped by gravity in the second pipe (6) and moved downward when the pressure in the first pipe (5) is atmospheric, so that the second pipe (6) communicates with the first pipe (5) via the valve seat chamber (3).

Description

Automatic gas exhaust 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, combustible gas may remain in a housing in the dust collection process. For example, in a wet dust collector for collecting dust of aluminum powder, hydrogen gas is generated by a reaction between water and aluminum powder in the dust collection process. In a dry dust collector for treating coal dust, biogas, acetylene gas, and the like may remain in a housing. In a state where these combustible gases are retained in the housing, there is a risk of explosion initiation, and therefore, a mechanism for releasing these combustible gases to the outside is required when the apparatus is stopped. Also, the release is preferably performed automatically.

Patent document 1 discloses an automatic gas discharge valve conceived in accordance with the need as described above. The automatic gas discharge valve includes a ball valve body that automatically opens and closes an exhaust port that opens at an uppermost portion of the device body. The ball valve body is normally supported by an elastic body in a state of opening the exhaust port, and when the device body side is brought into a negative pressure by the start of operation and a suction action is generated to the exhaust port, the elastic body is sucked in while being stretched by the suction action, thereby blocking the exhaust port.

Prior art literature

Patent literature

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

Disclosure of Invention

However, in the automatic gas discharge valve disclosed in patent document 1, since the spherical valve body that opens and closes the gas discharge port is supported by an elastic body, a large negative pressure of a certain level or more is required to sufficiently suck the spherical valve body against the gas discharge port to block the gas discharge 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 elastomer deteriorates its characteristics with time, there is a possibility that the opening and closing operation of the exhaust port cannot be performed when the elastomer is loosened or broken. In order to avoid such a deteriorated state, maintenance is periodically performed, and a valve or the like is replaced according to the deterioration of the elastic body, which may take a lot of time and effort in the preparation.

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

The present invention adopts the following means for solving the above-described problems.

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, the first pipe having an upper end portion open to the valve seat chamber and the open portion being a valve seat; a second pipe extending obliquely upward from a lower direction, the upper end of the second pipe communicating with the valve seat chamber; and a ball which is disposed so as to be movable from the second pipe to the valve seat chamber, is sucked and brought into contact with the valve seat when the first pipe is negative pressure, and closes the opening, and is moved downward by gravity from the second pipe when the first pipe is atmospheric pressure, so that the second pipe communicates with the first pipe via the valve seat chamber.

According to the present invention, since the ball moves between the inclined second pipe and the valve seat in accordance with the pressure in the first pipe, 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 structure.

In one aspect of the present invention, the valve seat chamber is provided with a third pipe, the third pipe extends upward from the valve seat chamber, an upper end portion of the third pipe is opened to the atmosphere, and the ball is configured to communicate the third pipe with the first pipe via the valve seat chamber when the ball is positioned below the second pipe.

According to this configuration, the ball communicates the third pipe with the first pipe when being located below the second pipe, and thus the gas can be efficiently discharged.

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

According to this configuration, since the valve main body is subjected to the antistatic treatment, it is possible to prevent electrostatic sparks from being generated by electrification of the gas discharge valve.

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

According to this structure, 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 provided with a drain hole below a wall portion forming the valve seat chamber.

According to this structure, since the drain hole is formed below the wall portion forming the valve seat chamber, 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 that opens to the outside along an extension line of one or both of the first pipe and the second pipe, and a screw is detachably screwed to an opening portion of the extension pipe that opens to the outside.

According to such a structure, since the valve body includes the extension pipe which is opened to the outside in the extension line of the first pipe or/and the second pipe, the opening of the extension pipe is normally closed by the screw, and therefore, the valve body can be easily cleaned by removing the screw.

According to the present invention, an automatic gas discharge valve that can reliably perform opening and closing operations of the valve with a simple structure can be provided.

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 evacuation valve according to an embodiment of the present invention.

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

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

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

Symbol description

1. Automatic gas exhaust valve

2. Valve body

221. Side plate hole (drainage hole)

3. Valve seat chamber

4. Valve seat

5. First pipeline

52. Extension pipeline of first pipeline

53. Opening part of extension pipeline of first pipeline

54. Screw for extending pipeline of first pipeline

6. Second pipeline

62. Extension pipeline of second pipeline

63. Opening part of extension pipeline of second pipeline

64. Screw for extending pipeline of second pipeline

7. Third pipeline

8. And (3) a sphere.

Detailed Description

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

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

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

The first pipe 5 extends upward from a first opening 51 provided in a bottom (lower) 211 of the valve body 2, and has an upper end open to the valve seat chamber 3 and a valve seat 4. The second pipe 6 extends obliquely upward from a second opening 61 provided in a side surface 213 of the valve body 2, and communicates with the valve seat chamber 3 at its upper end. The third pipe 7 extends upward from the valve seat chamber 3, and has an upper end communicating with a third opening 71 that opens into the atmosphere.

The ball 8 is configured to be freely movable from the second pipe interior 6 to the valve seat chamber 3, to be sucked and to be in contact with the valve seat 4 when the first pipe interior 5 is negative pressure, to close the opening, and to be moved downward by gravity from the second pipe interior 6 when the first pipe interior 5 is atmospheric pressure, so that the second pipe 6 and the third pipe 7 communicate with the first pipe interior 5 via the valve seat chamber 4.

The valve body 2 is constituted by a valve structure 21 and side plates 22, wherein the valve structure 2 is formed in a substantially rectangular shape by an aluminum alloy plate having a predetermined thickness dimension, 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 which are fitted through the formed holes and the holes 23, 24 of the valve structure 21. Here, the hole 24 is provided near the first opening 61 of the second pipe 6, and the screw 26 is attached to the valve body 2 by the nut 28 to hold the ball 8 in the second pipe 6.

The bottom 211 of the valve structure 21 is provided with screw holes 212, and the screw holes 212, 212 are used to mount the automatic gas discharge valve 1 in a wet dust treatment chamber described later. The valve structure 21 is attached to the wet dust treatment chamber by screw holes 212 and 212 provided deep into the valve structure 21, and therefore the automatic gas discharge valve 1 can be grounded to the housing of the wet dust treatment chamber or the like. Therefore, the antistatic measure (treatment) can be implemented.

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 forming an elliptical hole 31 in the valve structure 21 perpendicular to the paper surface of fig. 2, and sandwiching the hole 31 from both sides by the side plates 22 and 22 formed of transparent acrylic plates to close the hole. Therefore, the ball 8 is configured to be visually checked from the outside whether or not the valve seat 4 is closed.

Further, holes 221, 221 are formed below portions of the side plates 22, 22 that constitute wall portions of the valve seat chamber 3. The holes 221 and 221 are configured to function as drain holes for draining water droplets generated by condensation of water vapor to the outside in the valve seat chamber 3.

The valve body 2 includes extension pipes 52 and 62, the extension pipes 52 and 62 are opened to the outside along the extension lines of both the first pipe 5 and the second pipe 6, and screws 54 and 64 are detachably screwed into opening portions 53 and 63 of the extension pipes 52 and 62 opened to the outside.

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

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

Referring to fig. 3 and 4, wet dust treatment chamber 10 is provided with inlet pipe 11 and exhaust pipe 12 in housing 100 thereof. A storage tank 13 for storing the makeup water W is provided in the housing 100, a drain valve 14 for draining the makeup water W is provided at the bottom of the storage tank 13, and a drain tank 15 for receiving the drained makeup water W is disposed below the drain valve 14. An introduction pipe 19 is provided in the casing 100, and the introduction pipe 19 extends downward from the introduction pipe 11 to the surface of the makeup water W.

An explosion diffusion cover 16 and a diffusion pipe 17 are provided at an upper portion of the housing 100, and the diffusion pipe 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 at the uppermost portion 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 freely falls 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 in the second pipe 6. The ball 8 is separated from the valve seat 4, and 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 via the valve seat chamber 3. That is, the automatic gas discharge valve 1 is opened.

When the wet dust treatment chamber 10 is operated, the exhaust pipe 12 is sucked by an external fan (not shown), and the inside of the housing 100 is brought into a negative pressure state. In the automatic gas discharge valve 1 of fig. 2, the first pipe 5 is connected to the housing 100 to be negative pressure, and the ball 8 is sucked toward the valve seat 4 by the negative pressure and moves 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 5 is closed by the ball 8, and the first pipe 5 is not in communication with the second pipe 6 and the third pipe 7. That is, the automatic gas discharge valve 1 is in a closed state. Therefore, when the wet dust treatment chamber 10 is operated, the automatic gas discharge valve 1 normally operates the wet dust treatment chamber 10 without breaking the negative pressure in the housing 100.

When wet dust treatment chamber 10 is in an operating state, air from the working environment in which aluminum powder is mixed from introduction pipe 11 is introduced by negative pressure of housing 100 as indicated by arrow p in fig. 3. As indicated by arrow d in fig. 4, air mixed with aluminum powder introduced into introduction pipe 11 is guided through introduction pipe 19 to storage tank 13 storing makeup water W located below housing 100. The air guided to the reservoir tank 13 is brought into contact with the makeup water W, and the aluminum powder mixed in the air is replenished into 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, suction from the exhaust pipe 12 is stopped, and the inside of the housing 100 is opened again to the atmosphere. Since 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, the ball 8 does not suck toward the valve seat 4 due to the negative pressure, but falls down due to gravity by tilting of the second pipe 6, and returns again to the position of the broken line S supported by the screw 26 below in the second pipe 6.

As described above, the automatic gas discharge valve 1 of the present embodiment adopts a mechanism for opening and closing the valve by the inclination of the second pipe 6, the negative pressure of the first pipe 5, and the atmospheric pressure, and thus can realize an automatic gas discharge valve that reliably performs the opening and closing operation of the valve with a simple structure without using an active mechanism such as a motor. In addition, since the valve structure does not use a member that deteriorates like an elastic member, the durability as a device is high, and the maintenance at the time of use is also simple.

Since the valve body 2 takes an antistatic measure, safety can be ensured even in an environment where a flammable gas is generated without generating an electrostatic spark. When the valve is opened, the first pipe 5 communicating with the casing 100 extends upward from the valve seat chamber 3 through the valve seat chamber 3, and the upper end portion communicates with the third pipe 7 open to the atmosphere, so that the hydrogen gas generated by the contact between the aluminum powder and the water in the casing 100 can be efficiently discharged to the outside of the casing 100. In addition, since a gap exists between the wall surface of the second pipe 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 is in contact with the valve seat 4 can be visually confirmed, the operation state of the device can be easily observed. The drain hole 221 is provided below the valve seat chamber 3, and water condensed in the valve main body 2 is naturally discharged to the outside, so that cleaning for discharging water from the valve main body 2 is not required. Further, since the extension pipes 52 and 62 that open to the outside along the extension lines of both the first pipe 5 and the second pipe 6 are included, and the screws 54 and 64 are detachably screwed into the opening portions 53 and 63 that open to the outside of the extension pipes 52 and 62, cleaning of the inside of the valve main body 2 can be easily performed by detaching the screws 54 and 64, and thus, the daily maintenance and repair can be simplified. In addition, although an insertion type plug may be used instead of the screw, by using the screw, even when a positive pressure is applied to the wet dust treatment chamber, there is an effect that the components are not easily scattered.

In the above embodiment, the two cleaning extension pipes 52 and 62 are provided, but only one of them may be used. The valve structure 21 is formed 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 pipe 7 is provided, but the present invention is not limited to this, and can exhibit sufficiently useful effects even if the third pipe 7 is not provided. That is, an automatic gas discharge valve that can reliably perform opening and closing operations of the valve with a simple structure can be realized.

Claims

1. An automatic gas discharge valve, comprising:

a valve body;

a valve seat chamber provided in the valve main body;

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

a second pipe extending obliquely upward from below, the upper end of the second pipe communicating with the valve seat chamber; and

and a ball which is disposed so as to be movable from the second pipe to the valve seat chamber, is sucked and brought into contact with the valve seat when the first pipe is negative pressure, and closes the opening, and is moved downward by gravity in the second pipe when the first pipe is atmospheric pressure, so that the second pipe communicates with the first pipe via the valve seat chamber.

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

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

3. The automatic gas outlet valve of claim 2 wherein,

the valve body is subjected to an antistatic treatment.

4. An automatic gas outlet valve according to claim 2 or 3, wherein,

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. An automatic gas discharge valve according to any one of claims 1 to 3,

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

6. An automatic gas discharge valve according to any one of claims 1 to 3,

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