JPH0694024B2 - Attack device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is installed on the outside of an outlet of a powder or granular material storage container such as a hopper or a silo to impact the outflow portion to give a shock to accelerate the outflow of the granular material. The present invention relates to an attack device used in.

[0002]

2. Description of the Related Art Conventionally, as a device of this type, a full-scale shokai 59 is used.
The one disclosed in Japanese Patent No. 82681 is known.
As shown in FIG. 3, the technique disclosed in this publication has an intake port 102 provided on one side of an upper portion of a housing 101, an exhaust port 104 provided on a cap 103, and the cap 1
A diaphragm sheet 105 is disposed below the pressure sensor chamber 03, and a pressure accumulation chamber 107 that communicates with an upper portion of the diaphragm sheet 105 through a through hole 106 is provided below the diaphragm sheet 105 so as to surround the communication pipe 108. Is a piston chamber 109, and a piston 110 is mounted in the piston chamber 109. With this configuration, when the solenoid valve 111 connected to the exhaust port 104 is opened while supplying high-pressure gas from the intake port 102, the piston 11
0 rapidly descends, and the end surface of the rod of the piston 110 hammers the hit surface 112 to give an impact.

[0003]

The above-mentioned prior art has the following problems. Firstly, since the solenoid valve is opened and the piston is operated, a large amount of gas is exhausted to the atmosphere side at the time of impact, and an exhaust noise may occur after the impact. Secondly, the diaphragm sheet loses elasticity due to long-term use, it becomes impossible to seal between the pressure accumulating chamber 107 and the communication port of the communication pipe 108, and the impact force is reduced. Thirdly, it was difficult to downsize the diaphragm sheet, and it was difficult to adjust the impact force and the impact interval. Fourthly, it is necessary to connect high-pressure gas to both the intake port 102 and the exhaust port 104, which requires time and effort for piping, and there is a risk of piping mistakes.

[0004]

The striking device of the present invention comprises:
It is composed of an intake section having an intake port, a pressure accumulating section communicating with the intake section and having a pressure accumulating chamber, and an impacting section communicating with the pressure accumulating section via a discharge hole. The intake port communicates with the pressure accumulating chamber through the through hole and also communicates with the valve chamber through the pressure reducing valve. The pressure reducing valve closes the intake passage when the atmospheric pressure on the valve chamber side reaches a predetermined value. A valve body that opens and closes the discharge hole is mounted in the valve chamber, one surface of the valve body is pressurized by gas supplied through the pressure reducing valve, and the other surface peripheral portion of the valve body is supplied from the pressure accumulating chamber. It is arranged so as to be pressurized by the gas. Further, a piston and an accelerating member for accelerating the struck portion by the struck by the piston are arranged in the struck portion. According to a second aspect of the present invention, a movable diaphragm that increases or decreases the amount of gas passing is provided in a through hole between the intake port and the pressure accumulating portion to facilitate adjustment of the impact interval. The invention according to claim 3 relates to a specific structure of a pressure reducing valve, wherein a cylindrical air guide is disposed in a valve chamber with its base end opened toward the intake port side, and a spool is slidable in the air guide. The base of the spool is attached to the base end of the air guide so as to be able to come into contact with and separate from the base end of the air guide. A gas flow path communicating with the hole is formed, the air guide is provided with a through hole that communicates the inside of the air guide with the gas flow path, and the tip flange of the air guide is provided with an axial through hole. By doing so, it is possible to easily adjust the attack force.

[0005]

In the present invention, part of the high pressure gas supplied from the intake port flows into the pressure accumulating chamber through the through hole. The rest of the high pressure gas flows into the valve chamber through the pressure reducing valve. And
When the pressure on the valve chamber side reaches a certain pressure, the pressure reducing valve is closed and the pressure on the valve chamber side, that is, the pressure received on one surface of the valve body is maintained at a predetermined value. On the other hand, since the high pressure gas continues to flow into the accumulator, the pressure on the accumulator side continues to rise. When the pressure on the accumulator side increases and the force that pressurizes the valve disc from the accumulator chamber side exceeds the force that pressurizes the valve disc from the valve accommodator side, the valve disc moves upward (see FIG. 2) and The high-pressure gas passes through the discharge hole and instantaneously flows into the hitting portion, and the pressure of the high-pressure gas actuates the piston to impact the hitting surface. When the high-pressure air flows out of the pressure accumulating chamber, the pressure in the valve chamber pushes down the valve element to open the pressure reducing valve, and the high-pressure gas flows into the valve chamber, and the above operation is repeated thereafter.

Further, in the invention of claim 2, the hitting interval can be arbitrarily set by adjusting the movable diaphragm. Further, in the third aspect of the invention, since the force for opening the valve can be changed by changing the set pressure of the pressure reducing valve, it is possible to arbitrarily change the impact force by the discharge of the high pressure gas.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The hitting device shown in the drawings includes an intake section A having an intake port 1, a pressure accumulating section B having a pressure accumulating chamber 2 mounted below the intake section A and communicating with the intake section A, and the accumulating section. And a hitting portion C having a piston 4 which is attached below B and communicates with each other through a discharge hole 3 of a pressure accumulating portion B. A through hole 6 a and a pressure reducing valve mounting chamber 7 having a diameter larger than that of the air chamber 5 are connected to the air chamber 5 connected to the intake / intake port 1. A movable diaphragm 8 is attached to the tip of the through hole 6a. The movable diaphragm 8 has a structure in which a tapered diaphragm member 8b is screwed into a female screw hole 8a having a tapered connecting side with the through hole 6a.
The amount of high-pressure gas passing through can be adjusted by changing the tightening position of the throttle member 8b. The base end of the through hole 6b is connected to the female screw hole 8a, and the tip end thereof communicates with the pressure accumulating chamber 2 provided in the pressure accumulating portion B.

A pressure reducing valve 9 is mounted in the pressure reducing valve mounting chamber 7. The pressure reducing valve 9 is configured as follows. A spool receiver 11 is slidably mounted in a bottomed hole 10a of a spring receiver 10 screwed into a female screw formed in the pressure reducing valve mounting chamber 7, and the spool receiver 11 and the bottomed hole 10 are attached.
A spring 12 for urging the spool receiver 11 toward the air chamber 5 is provided between the spring 12 and the bottom of a. In the figure, reference numeral 10b is a through hole, and 10c is a nut for fixing a spring receiver.

A base end flange of an air guide 13 having a tubular shape and having flanges at both ends is brought into contact with a step portion formed between the base portion of the pressure reducing valve mounting chamber 7 and the air chamber 5, and is sealed by an O-ring. The base end side opening is tapered. On the other hand, the tip flange is in contact with the spring receiver 10. A plurality of through holes 13a are provided in the middle portion of the air guide 13 to connect the inner cavity of the air guide 13 and the annular flow passage 14 formed outside. Also,
The tip end flange of the air guide 13 has a through hole 13 in the axial direction.
A plurality of b are provided.

A spool 15 is mounted in the inner cavity of the air guide 13. Flange 1 at the base of the spool
5a is formed, and an O-ring 15b is attached to one side of the flange 15a so as to abut on the base end tapered portion of the air guide 13. In addition, instead of the O-ring, a plate-shaped or other appropriate-shaped seal member may be interposed. The base side of the spool 15 has a small diameter and a gap is formed between the spool 15 and the inner wall of the air guide 13 so that high-pressure gas can pass therethrough. On the other hand, the tip side of the spool 15 has a large diameter,
The air guide 13 is slidably contacted with the inner wall of the air guide 13, and an O-ring 15c is attached to the tip of the air guide 13. A spring 16 that urges the spool 15 toward the spool receiver 11 is provided between the base end surface of the spool 15 and the opposing wall of the air chamber 5.

A valve chamber 17 which opens downward is provided in the lower portion of the intake portion A, and the peripheral wall 1 of the valve chamber 17 is provided.
A valve body 18 which is slidably in contact with 7a and formed of an elastic member is mounted. An elastic member is most suitable for the valve body 18, but a resin material or the like can be used. The valve chamber 17 is in communication with the annular flow passage 14 through the through hole 19.

A pressure accumulating portion B is attached below the intake portion A. The pressure accumulating portion has an annular pressure accumulating chamber 2 communicating with the through hole 6b of the intake portion A, and an annular partition wall 20 is provided upright in the center. The tip of the partition wall 20 serves as the valve seat of the valve body 18, and the inner wall of the partition wall serves as the discharge hole 3.

A step portion is formed around the lower end of the discharge hole 3 of the pressure accumulating portion B, and the upper end portion of the cylinder 21 of the hitting portion C is fitted in the step portion, and the lower end of the cylinder 21 is provided with the flange 2.
It is fitted to the upper surface step portion of No. 2. Then, the intake portion A, the pressure accumulating portion B, and the hitting portion C are integrally tightened and fixed by the bolt 23 and the nut 24. A piston 4 is mounted in the cylinder 21, and the flange 2
A hitting member 26 is attached to a hole formed in the center of 2. The spring 2 for urging the piston 4 upward is provided between the lower surface of the piston 4 and the upper surface of the hitting member 26.
7 are provided. In the figure, reference numeral 21a is an exhaust hole, reference numeral 4a
Is an attacking part protruding from the piston.

The hitting device of the present invention constructed as described above is fixed to the hitting surface 28 near the outlet of the granular material storage container with the bolt 29, and the air supply pipe 30 is connected to the intake port 1. To use. Reference numeral 31 is a high-pressure gas generator, and 32 is a two-way valve.

The operation will be described below. In FIG. 1, when high-pressure gas is introduced into the intake port 1 from the air supply pipe 30, the high-pressure gas flows into the air chamber 5, and a part of the high-pressure gas flows into the accumulator chamber 2 through the through hole 6a, the movable diaphragm 8 and the through hole 6b. It collects here. The remaining portion flows toward the pressure reducing valve 9, passes through the gap between the spool 15 and the air guide 13, passes through the through hole 13a of the air guide, the annular flow passage 14, and the through hole 19 and flows into the valve chamber 17, where it is collected. Here, when high pressure gas is filled in the upstream side of the valve body 18 to reach a predetermined pressure determined by the springs 12 and 16, the spool 15 moves in the direction of the spring receiver 10 against the spring 12 and is attached to the spool 15. The ring 15b closes the base end opening of the air guide 13 (see FIG. 2). Therefore, the inflow of high-pressure gas to the valve chamber 17 side is stopped, and the pressure received by the upper surface of the valve body 18 is maintained at a constant value set by the spring. On the other hand, the high-pressure gas continues to accumulate in the pressure accumulating chamber 2, and the upward force applied to the peripheral portion of the lower surface of the valve body 18 gradually increases.

When the upward force received by the lower surface of the valve body 18 exceeds the downward force received from the valve chamber 17 side, the valve body 18
Is separated from the valve seat (see FIG. 2), and the high-pressure gas in the pressure accumulating chamber 2 instantly flows into the cylinder 21 through the discharge hole 3 from the gap formed between the valve body and the valve seat, and pushes down the piston 4. The hitting part 4a of the piston 4 hits the hitting member 26, and the hitting surface 28
Attack.

In the above, by adjusting the movable diaphragm 8, the hitting interval can be set arbitrarily. That is, if the movable throttle 8 is narrowed down to reduce the passage amount of the high-pressure gas per unit time, it takes time to fill the accumulator chamber 2 with the high-pressure gas, and the firing interval becomes long. On the contrary, if the aperture is opened and the passing amount is increased, the attack interval becomes shorter. Although it is optimal to provide the movable diaphragm, the movable diaphragm may not be provided. When the movable throttle is not provided, the firing interval is changed by increasing or decreasing the supply pressure of the high pressure gas.

By adjusting the spring force of the pressure reducing valve 9, the impact force can be set arbitrarily. That is, when the spring force is increased, the force received by the upper surface of the valve body 18 is increased, and when the valve body 18 is raised, a large amount of high-pressure gas, which opposes it, is accumulated in the pressure accumulating chamber 2, so that the impact force is increased.
On the contrary, if the spring force is reduced, the attack force will be weakened. The impact force is adjusted by increasing or decreasing the screwing depth of the spring receiver 10 into the pressure reducing valve mounting chamber 7. If a gap is created between the spring receiver 10 and the air guide 13 by this adjustment, a ring-shaped spacer is interposed and fixed. Further, the spring 12 can be changed to one having a different spring constant. Further, a female screw hole is provided from the bottomed hole of the spring receiver 10 to the outside, and a bolt-shaped spring adjusting member is screwed into the female screw hole from the outside of the spring receiver 10, and the spring 12 is attached at the tip of the spring adjusting member. The supporting force may be changed, and the spring force may be increased or decreased by changing the screwing depth of the spring adjusting member. It is also possible to adopt a structure in which the set pressure in the pressure reducing valve cannot be changed. In other words, it is sufficient that it has a function of stopping the inflow of high-pressure gas when the pressure on the valve chamber 17 side exceeds a certain value.

[0019]

According to the present invention, the pressurized gas is not exhausted to the atmosphere at the time of switching the valve and is accumulated in the device and used for the operation of the next cycle. The next cycle starts up quickly. Further, the generation of exhaust noise can be reduced as much as possible. Further, since the pressure reducing valve is installed in the main body instead of the solenoid valve, the high-pressure gas pipe is a single air supply pipe, and there is no risk of piping mistakes and damage to the accessories as well as the pipe being prepared. Further, since the diaphragm sheet is not used, fatigue of parts is small, a stable use state can be obtained without lowering the impact force due to long-term use, and size reduction is also possible. Further, according to the inventions of claims 2 and 3, the attack force,
It is easy to adjust the attack interval.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is likewise an enlarged cross-sectional view of a pressure reducing valve portion.

FIG. 3 is a partially enlarged cross-sectional view of the same state when switching valves.

FIG. 4 is a sectional view of a conventional example.

[Explanation of symbols]

 A air intake portion B pressure accumulating portion C hitting portion 1 air inlet 2 pressure accumulating chamber 3 discharge hole 4 piston 8 movable throttle 9 pressure reducing valve 10 spring receiver 11 spool receiver 12 spring 13 air guide 13a through hole 14 annular flow passage 15 spool 17 valve chamber 18 valve body 19 through hole 21 cylinder 26 hitting member

Claims (3)

[Claims] 1. An intake part having an intake port, a pressure accumulating part having a pressure accumulating chamber communicating with the intake part, and an accelerating part communicating with the pressure accumulating part through a discharge hole. A valve chamber is formed between the intake port and the hole, the intake port communicates with both the pressure accumulating chamber and the valve chamber, and the air pressure on the valve chamber side reaches a predetermined value between the intake port and the valve chamber. A pressure reducing valve that closes the intake flow path is provided, and a valve body that opens and closes the discharge hole is attached to the valve chamber, and one surface of the valve body is heated by the gas supplied through the pressure reducing valve. The other surface of the valve body is pressed and the peripheral portion of the valve body is arranged to be pressurized by the gas supplied from the pressure accumulating chamber. The piston is struck by the struck portion and the struck portion is struck by the impact of the piston. An attacking device provided with an attacking member 2. The percussion device according to claim 1, wherein a movable throttle for increasing / decreasing a gas passage amount is provided in a through hole between the intake port and the pressure accumulating portion. 3. A pressure reducing valve, wherein a cylindrical air guide is arranged in a valve chamber with a base end thereof being opened toward an intake port side, a spool is slidable in the air guide, and a base portion of the air guide is A gas flow passage is attached to the base end so as to be detachable from the base end, and the spool is urged toward the intake port by a spring arranged at the bottom of the valve chamber, and communicates with a communication hole with the valve chamber outside the air guide. Wherein the air guide is provided with a through hole that communicates the inside of the air guide with the gas flow path, and the tip flange of the air guide is provided with an axial through hole. Item 1 or 2 of the attack device