JP3344982B2 - High pressure gas discharge device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-pressure gas discharge device which is installed in a powder storage container such as a hopper or a silo to promote the flow of powder.

[0002]

2. Description of the Related Art Conventionally, this type of apparatus is disclosed in
As shown in No. -15230, a valve cylinder is attached to the inside and outside of the tank, the tip of the valve cylinder is used as a discharge port, a piston is mounted in the cylinder, and a piston receiver serving as a valve seat in the valve cylinder is provided. It has a structure with a ring attached.

[0003] The above-mentioned conventional apparatus has an advantage that it can be easily attached to a storage container because the axis of the tank and the discharge port are coaxial, but has the following problems. Since the valve mechanism is provided inside the tank, it is necessary to remove the entire device including the tank from the storage container in the event of failure or maintenance, which is dangerous and time-consuming, and requires lifting equipment. , Including enormous costs. And since the valve mechanism is in the tank,
Only one tank and one valve and one discharge port can be configured. Also, the inner diameter of the piston receiving ring must be smaller than the inner diameter of the valve cylinder. Therefore, the discharge capacity is determined not by the discharge port diameter but by the inner diameter of the piston receiving ring, and it is difficult to improve the discharge capacity.

[0004]

SUMMARY OF THE INVENTION The first object of the present invention is to separate the valve mechanism from the tank while maintaining the advantages of the conventional device, that is, easy installation, and to perform discharge regardless of the diameter of the valve receiving ring. The second task is to be able to determine competence.

[0005]

The high-pressure gas discharge device according to the present invention comprises a tank and a discharge portion mounted outside the tank. The tank has a communication port with a discharge unit. The discharge section has a communication path communicating with the communication port of the tank, a discharge path formed in parallel with the communication path, and a piston chamber orthogonal to the discharge path, wherein the discharge path faces the piston chamber. The piston has a valve seat on the piston chamber side end surface of the discharge passage, and has an annular passage outside the valve seat for communicating the communication passage with the piston chamber. A piston is mounted in the piston chamber. An air supply port is opened in the communication passage, and the
A supply / exhaust port is opened in the ton chamber.

According to a second aspect of the present invention, a valve is provided outside the air supply / exhaust port.
If a bypass chamber is provided and a bypass exhaust path is provided in this valve chamber,
Both are equipped with umbrella type valves. According to a third aspect of the present invention, the end face of the piston has a concave portion. According to a fourth aspect of the present invention, a plurality of discharge portions are attached to the tank.

[0007]

According to the present invention, when the pressure in the tank is increased while the piston is pressed against the valve seat, and then the piston is retracted instantaneously, the high-pressure gas in the tank reaches the discharge passage through the communication passage and the annular passage. And is discharged from the discharge port. Here, since the discharge unit is attached to the outside of the tank, maintenance can be performed by separating the two, and a plurality of discharge units can be attached to one tank. Also, it becomes a valve seat of the piston from an end of the discharge passage, the inner diameter of the valve seat as possible out to the inner diameter of the discharge passage least equivalent. Claim 4
According to the invention, the discharged gas is rectified by the concave portion of the piston, and directivity can be obtained in the discharge direction.

[0008]

First Embodiment In FIG. 1, a tank A and a discharge section B constitute a high-pressure gas discharge device C. The tank part A has a communication port 2 and a flange 3 at the lower part of the tank 1, and a discharge part B is attached to the flange 3 by a fastening member 4. The discharge section B includes a communication path 5 provided vertically in communication with the communication port 3, a discharge path 7 provided coaxially with the communication path 5, and a piston chamber 10 orthogonal to the discharge path 7. The lower end of the discharge path 7 is the discharge port 6. The upper part of the discharge path 7 is bent in the same area toward the piston chamber 10 and opens to the piston chamber 10. The open end serves as a valve seat 8. Outside the valve seat 8, an annular passage 16 for communicating the communication passage 3 with the piston chamber 10 is provided.

A piston 9 for opening and closing the discharge passage 7 is mounted in the piston chamber 10. When accumulating pressure in the tank, the piston 9 is pressed against the valve seat 8 by the internal pressure of the piston 10 to close the discharge passage 7, and separates from the valve seat 8 to open the discharge passage when the pressure in the piston chamber 10 is reduced. It is. The closing plate 12 of the piston chamber 10 is provided with a supply / exhaust port 15 communicating with the piston chamber 10.
A valve chamber 25 is provided outside the supply / exhaust port 15. Reference numeral 11 denotes a seal member, 13 denotes a fastening member, and 14 denotes a packing.

A bypass exhaust passage 26 is provided in the valve chamber 25.
And an umbrella valve 27 for opening and closing the bypass exhaust passage 26 is mounted. The umbrella valve 27 closes the bypass exhaust passage 26 during tank pressure accumulation and opens the bypass exhaust passage 26 during discharge.

An air supply passage 17 communicating with the communication passage 5 is provided above the discharge section B, and a check valve 18 is attached to the air supply passage 17. In the figure, reference numeral 19 denotes a high-pressure gas source, 20
Is a three-way valve.

FIG. 3 shows the communication passage 5, the piston chamber 10,
This shows the relationship between the cross-sectional areas of the discharge path 7. That is,
In FIG. 3, D is the inner diameter of the discharge port 6, the discharge path 7, and the valve seat 8, D1 is the inner diameter of the annular passage 16 and the outer diameter of the valve seat 8, and D2 is the outer diameter of the annular passage 16. , D3 are the inner diameters of the communication port 2 and the communication path 5 of the tank. The cross-sectional area of each part is such that (D3 section cross section)> (D2-D1 section cross section)> D section cross section. With this configuration, the cross-sectional area of the flow path of the discharged gas gradually decreases,
Discharge force can be increased. It is not an essential requirement that the cross-sectional area of each part be in such a relationship.

FIG. 4 shows an attached state of the apparatus of this embodiment. Reference numeral 21 denotes a storage container, 22 denotes a nozzle for discharging high-pressure gas into the storage container, and the shape thereof is arbitrary. The high-pressure gas discharge device is mounted and used in an arbitrary direction such as vertical or horizontal depending on the installation conditions.

In the apparatus of this embodiment, the three-way valve 20
When the high-pressure gas is introduced into the apparatus from the high-pressure gas generation source 19 via the check valve, the high-pressure gas flows into the communication passage 5 through the check valve 18, enters the tank 1 through the communication port 2, and accumulates the pressure in the tank. At this time, a part of the high-pressure gas supplied from the high-pressure gas generation source flows into the piston chamber 10 through the valve chamber 25 and the supply / exhaust port 15 and pushes the piston 9. The pressure contact is made and the discharge path 6 is closed.

When the three-way valve is operated to the exhaust side, the gas in the piston chamber 10 is exhausted, and the piston 9 retreats.
The pressurized gas in the tank is discharged at a stretch and discharged from the discharge port. It is desirable that the exhaust of the piston chamber 10 be performed as instantaneously as possible. However, in this embodiment, since the bypass exhaust path 26 opened and closed by the umbrella-shaped valve 27 is provided, the gas in the piston chamber is removed by the bypass exhaust path. Since the gas is also exhausted from 26, the exhaust speed is improved, the movement of the piston 9 is accelerated, and the discharge force is increased.

[0016]

Embodiment 2 FIG. 5 shows an embodiment in which a conical recess 28 is provided on the end face of a piston 9. Other configurations are the same as those of the first embodiment except that the valve chamber 25 is not provided. The shape of the concave portion may be a hemispherical shape instead of a conical shape.

By providing the concave portion 28, the annular passage 1
The gas that has flowed into the piston chamber 10 from the
Through the discharge path 7. Therefore, directivity is obtained in the flow of the discharged gas, and an effective discharge state can be obtained.

[0018]

[Embodiment 3] FIG. 6 shows discharge portions B at both ends of the tank 1.
Are attached. A three-way valve 20 is connected to each of the discharge sections B, and a common high-pressure gas generation source 19 is connected to both the three-way valves. According to this embodiment, the two three-way valves can be alternately switched to discharge alternately from the two discharge units. Therefore, it is possible to discharge from two places of the storage container with one device.

[0019]

According to the present invention, the following effects can be obtained. (1) Since the communication passage of the tank and the discharge passage are parallel to each other, attachment to the storage container is easy. (2) Since the discharge part is provided outside the tank independently of the tank, the discharge part can be disassembled even when it is attached to the storage container in repair and maintenance, and the discharge part can be removed, so that workability and workability can be improved. (3) Since the discharge section is provided outside the tank independently of the tank, a plurality of discharge sections can be attached to the tank.
Therefore, it is possible to save the tank as a device,
Cost reduction can be achieved. (4) Since the piston chamber is provided orthogonal to the discharge path, the structural restriction that the cross-sectional area of the gas flow path from the communication port of the tank to the discharge port is smaller in the middle than the cross-sectional area of the discharge port. Is eliminated. Therefore, there is little attenuation of the discharge force, and a high effect of removing the granular material can be obtained. (5) Since there are few components and airtight processing parts, assemblability is improved and quality is stable.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part showing a discharge state according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing the same air supply state.

FIG. 3 is a sectional view showing dimensions of an air passage.

FIG. 4 is a front view showing the same mounting state.

FIG. 5 is a sectional view of a main part showing a discharge state according to a second embodiment of the present invention.

FIG. 6 is a sectional view showing an air supply state according to a third embodiment of the present invention.

FIG. 7 is a front view showing the same mounting state.

[Explanation of symbols]

 Reference Signs List A tank part B discharge part 1 tank 2 communication port 3 flange 4 fastening member 5 communication path 6 discharge port 7 discharge path 8 valve seat 9 piston 10 piston chamber 11 sealing member 12 closing plate 13 fastening member 14 packing 15 supply / exhaust path 16 Annular passage 17 Air supply port 18 Check valve 19 High-pressure gas source 20 Three-way valve 21 Storage container 22 Nozzle 25 Valve chamber 26 Bypass exhaust path 27 Umbrella valve 28 Recess

Claims (4)

(57) [Claims] 1. A tank comprising: a tank; and a discharge unit attached to the outside of the tank, wherein the tank has a communication port with the discharge unit, and the discharge unit communicates with a communication port of the tank. And a discharge path formed in parallel with the communication path, and a piston chamber orthogonal to the discharge path, wherein the discharge path curves toward the piston chamber and opens into the piston chamber, and the piston of the discharge path The chamber side end surface is a valve seat, and has an annular passage outside the valve seat that communicates the communication passage with the piston chamber. A piston is mounted on the piston chamber, and an air supply port is provided on the communication passage. The piston chamber is open
High-pressure gas discharge device with open exhaust port 2. A valve chamber is provided outside the air supply / exhaust port.
A bypass exhaust path is provided in the valve chamber of
2. An umbrella type valve for opening and closing the path exhaust path is provided.
High pressure gas discharge device as described 3. The high-pressure gas discharge device according to claim 1, wherein an end surface of the piston has a concave portion. 4. The high-pressure gas discharge device according to claim 1, wherein a plurality of discharge portions are attached to the tank.