JP2007118953A - Intermittent hitting apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain an accurate actuation of a hitting apparatus without changing a three-way valve under a condition that accumulation of pressure is insufficient in an intermittent hitting apparatus. <P>SOLUTION: The intermittent hitting apparatus is composed of a hitting apparatus body 1, a high-pressure gas feeding apparatus 2 and a high-pressure gas generating source 3. The high-pressure gas feeding apparatus 2 has the three-way valve 21 placed between the high-pressure gas generating source 3 and a gas feeding and exhausting opening 13 of the hitting apparatus body, a gas flow path 27 connecting the three-way valve 21 with the gas feeding and exhausting opening 13, and a pilot flow path 23 connected with an air-pressure pilot part 22 provided on the three-way valve 21 and placed through a speed controlling valve 26, and the pilot flow path 23 is connected with a pressure accumulating room 15 of the hitting apparatus body 1. By this constitution, a high-pressure gas is fed into the pressure accumulating room 15 from the surrounding of the valve element 14 of the hitting apparatus body 1, and when the pressure of the pilot flow path 23 is elevated and reaches a pilot pressure for changing the three-way valve 21, the three-way valve 21 is changed, and the high-pressure gas in the gas flow path 27 is exhausted and the high-pressure gas in the pressure accumulating room 15 pushes down a piston 11. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an intermittent hitting device that is attached to a powder storage container such as a hopper and a silo and a dust collection container such as a bag filter to promote discharge of the powder.

Conventionally, it has been widely used that the main body of the impactor has a structure in which an air supply / exhaust port, a valve body, a piston, and a pressure accumulating chamber, and the piston is operated by the high pressure gas in the pressure accumulating chamber, The pilot is branched and connected from the high-pressure gas flow path to the impactor body. Moreover, what was comprised integrally with the high pressure gas supply apparatus is not known.
In the invention described in this document, a pneumatic pilot provided in a three-way valve is branched and connected from a flow path for supplying high-pressure gas to the main body of the impacting device. Therefore, the pressure accumulation state in the impact device main body is not directly reflected in the operation of the three-way valve. As a result, even when the high-pressure gas is not sufficiently accumulated in the pressure accumulating chamber due to malfunction of the valve body, the three-way valve operates and intermittent supply is performed. Further, the invention described in this document does not integrally form the impacting device main body and the high-pressure gas supply device. In the conventional configuration, if the distance from the high-pressure gas supply device to the impacting device main body is long, the performance deteriorates. In particular, even if the exhaust valve is used for quick exhaust in a high-pressure gas supply device, if the distance to the impacting device body is long, the exhaust to the impacting device will take time, causing the valve body to move badly and failing to operate normally. May happen.

  This invention, the first problem is to obtain an accurate operation of the impact device without switching the three-way valve in a state where the pressure accumulation is insufficient, by linking the pressure accumulation state in the pressure accumulation chamber with the operation of the three-way valve, A second problem is to integrate the impact device main body and the high-pressure gas supply device.

The intermittent hitting device according to the present invention includes a hitting device main body, a high-pressure gas supply device, and a high-pressure gas generation source.
The impacting device main body has an air supply / exhaust port, a valve body attached to the air supply / exhaust port, a piston, and a pressure accumulation chamber, and the piston is operated by high-pressure gas accumulated in the pressure accumulation chamber.
The high-pressure gas supply device includes a three-way valve interposed between a high-pressure gas generation source and the air supply / exhaust port, a gas flow path connecting the three-way valve and the air supply / exhaust port, and an air pressure provided in the three-way valve. A pilot flow path is connected to the pilot section, and a speed control valve having a check valve and a throttle is interposed. The pilot flow path is connected to a pressure accumulating chamber of the impacting device body.
With the above configuration, when the high pressure gas is supplied from the periphery of the valve body of the impactor main body to the pressure accumulating chamber, the three-way valve is switched when the pilot flow path reaches the pilot pressure to switch the three-way valve, and the gas flow The high pressure gas in the passage is discharged, and the high pressure gas in the pressure accumulating chamber pushes down the piston.

  The invention of claim 2 is configured such that the impact device main body and the high-pressure gas supply device are integrally formed.

In this invention, the high-pressure gas supplied from the high-pressure gas generation source reaches the supply / exhaust port of the impactor main body from the gas flow path through the three-way valve, and pushes down the valve body attached to the part to the pressure accumulating chamber. A part of the reservoir reaches the pilot section through the pilot flow path.
When the air pressure in the pressure accumulating chamber increases by continuing the supply of the high-pressure gas, the air pressure in the pilot section also increases, and the three-way valve switches when the air pressure reaches a predetermined pilot pressure for switching the three-way valve.
Since the supply of high-pressure gas from the high-pressure gas generation source is stopped when the three-way valve is switched, the valve body that has closed the air supply / exhaust port is opened, and the high-pressure gas accumulated in the pressure accumulation chamber is transferred from the air supply / exhaust port to the cylinder. It flows in at once and pushes down the piston. An impact operation is obtained by pushing down the piston.
When the high-pressure air in the pressure accumulating chamber is discharged outside the apparatus, the pressure in the pilot section also decreases, so the three-way valve is switched and high-pressure gas flows in again to repeat the above operation.

In the present invention, since the pilot part for operating the three-way valve is directly connected to the pressure accumulating chamber, the pressure increase in the pressure accumulating chamber can be regarded as the pressure increase in the pilot part as it is. Therefore, the three-way valve is not switched unless the pressure in the pressure accumulating chamber is increased, and intermittent supply is not performed when a problem occurs in the valve body, and the above problem is solved.
As described above, the operation is continued during the supply of the high-pressure gas, and automatically stops when the supply of the high-pressure gas is stopped. Also, unlike an impact device that operates by quickly exhausting high-pressure gas, it does not operate no matter how remote it is.
Moreover, since the distance between the high pressure gas supply device and the impact device main body can be made close by integrating the impact device main body and the high pressure gas supply device, there is no need for quick exhaust and high responsiveness. Can be obtained. In addition, space saving is possible, and the impact frequency of the impact device main body can be individually set by a speed control valve attached individually.

  Examples will be described below.

  A high-pressure gas supply device 2 is integrally attached to the supply / exhaust port side of the impactor main body 1, and the high-pressure air supply device 2 is connected to a high-pressure gas generation source 3.

The impacting device main body 1 has an air supply / exhaust port 13 at an upper portion of a cylinder 12 to which a piston 11 is attached, and the air supply / exhaust port 13 communicates with the cylinder 12 via a valve body 14 that moves up and down by gas pressure. . A pressure accumulating chamber 15 is formed around the air supply / exhaust port 13, and when the valve body 14 disposed in the air supply / exhaust port 13 is lowered, gas flows from the air supply / exhaust port 13 to the pressure accumulating chamber 15. When the body 14 is rising, gas flows from the pressure accumulation chamber 15 to the cylinder 11.
Reference numeral 16 in the drawing denotes a spring that pushes up the piston 11.

  The high-pressure gas supply device 2 includes a three-way valve 21 connected to a high-pressure gas generation source 3, and the three-way valve 21 is switched according to a command from a pilot unit 22. The pilot portion 22 is connected to the pressure accumulating chamber 15 of the impacting device main body 1 via a pilot flow path 23. The pilot flow path 23 is provided with a speed control valve 26 for adjusting the pitch of intermittent air supply, which is configured by arranging a throttle 24 and a check stool 25 in parallel. Reference numeral 27 in the figure denotes a gas flow path that connects the three-way valve 21 and the air supply / exhaust port 13 of the impacting device body 1.

The operation of this embodiment will be described below.
When supply of the high-pressure gas from the high-pressure gas generation source 3 is started, the valve body 14 is pushed down through the three-way valve 21 and the gas passage 27 to the supply / exhaust port 13 of the impacting device body 1. Since the valve body 14 is pushed down, the flow path to the cylinder 11 is blocked, and the high-pressure gas reaches the accumulator 15 from the peripheral edge of the valve body 14 (see FIG. 1). Since the pressure accumulation chamber 15 is connected to the pilot portion 22 of the three-way valve 21, when the gas pressure in the pressure accumulation chamber 15 rises, the pressure in the pilot portion 22 rises accordingly. Therefore, when the pressure in the pressure accumulating chamber reaches a predetermined pressure, the pressure in the pilot section 22 reaches the pressure at which the three-way valve 21 should be switched, and the three-way valve is switched.
It should be noted that the pressure change in the pilot section 22 can be adjusted by adjusting the throttle 24 of the speed control valve 26.

  When the three-way valve is switched, the supply of the high-pressure gas from the high-pressure gas generation source 3 is stopped, and the gas in the gas flow path 27 is exhausted. At this time, the high-pressure gas in the pressure accumulating chamber 15 pushes up the valve body 14 and flows into the cylinder 12 at once, and pushes down the piston 11 (see FIG. 2).

  This invention makes it possible to reliably operate the intermittent hitting device and has industrial applicability.

Sectional drawing which shows the supply state of this invention Example Cross-sectional view showing exhaust state

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Impactor body 2 High pressure gas supply device 3 High pressure gas generation source 11 Piston 12 Cylinder 13 Supply / exhaust port 14 Valve body 15 Accumulation chamber 16 Spring 21 Three-way valve 22 Pilot part 23 Pilot flow path 24 Restriction 25 Check valve 26 Speed control Valve 27 Gas flow path

Claims (2)

It consists of an impactor body, a high-pressure gas supply device, and a high-pressure gas generation source,
The impact device main body has an air supply / exhaust port, a valve body, a piston, and a pressure accumulating chamber, and the piston is operated by high-pressure gas in the pressure accumulating chamber,
The high-pressure gas supply device includes a three-way valve interposed between a high-pressure gas generation source and the supply / exhaust port, a gas flow path connecting the three-way valve and the supply / exhaust port, and a pneumatic pilot provided in the three-way valve. A pilot flow path that is connected to a part and intervened with a speed control valve having a check valve and a throttle,
The pilot channel is connected to a pressure accumulating chamber of the intermittent impacting device body,
The high pressure gas is supplied from the periphery of the valve body of the intermittent impacting device main body to the pressure accumulating chamber, and when the pilot flow path is increased to reach the pilot pressure for switching the three-way valve, the three-way valve is switched, The high pressure gas was discharged and the high pressure gas in the pressure accumulation chamber pushed down the piston.
Intermittent hammer The intermittent hitting device according to claim 1, wherein the intermittent hitting device main body and the high-pressure gas supply device are integrally formed.

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