JPS5827790Y2 - Mechanism to prevent clogging of the shutter part of a spreader - Google Patents

Description

[Detailed description of the device] This device is used to spread powdered or granular agricultural chemicals, fertilizers, etc. with appropriate roughness, and when the powder or granules are pneumatically conveyed by an air stream, The present invention relates to a clogging prevention mechanism for a portion of a shutter that prevents clogging of powder or granular material from occurring in the operating region of the shutter in a body flow path.

When a shutter is used to supply or cut off this type of powder or granular material (hereinafter referred to as powder or granular material), problems arise such as clogging of the material at the gate and incomplete processing due to material being caught by the shutter. These include closing, clogging due to material entering the sliding part of the shutter relative to the gate, and shutter malfunction.

In particular, when closing the shutter, if the shutter operation is not smooth or the shutter is closed incompletely, the material may pass through the gate and be brought into the blower's discharge flow path and be wasted, or the blower may be damaged. - remains in the hopper outlet flow path downstream of the gate or the discharge flow path of the blower when the
This causes waste in that the air is discharged unnecessarily when the blower is started.

This invention was made to improve the above-mentioned drawbacks, and the structure of the spreader was improved to ensure smooth shutter operation and to prevent material from clogging when opening and closing the shutter relative to the gate. This is intended to provide a mechanism for preventing clogging of a part of the shutter.

This invention will be explained in detail below based on the illustrated embodiments.

In the figure, reference numeral 1 denotes a material tank having an input port with a lid 2 attached to the top, and a funnel-shaped hopper 3 is formed at the lower end of the tank.

A vortex blower 4 is disposed in front of the material tank 1 and is driven by an engine 5.

A conduit 6 bent in an L-shape is connected to the discharge port 4a of the blower 4, and the conduit 6 is connected to a spray tube 8 via a bellows tube 7, forming a series of discharge channels 9. are doing.

The discharge part of the hopper 3 is communicated with the discharge passage 9 via a connecting pipe 10 that is connected to the conduit 6 from the side, for example, and forms an outlet passage 11 of the hopper 3. ing.

This outlet channel 11 is provided with a shutter device.

The shutter device above is a rectangular plate-shaped shutter 1 of the offshore sky.
2, and a gate 13 consisting of two members 13a and 13b, and the shutter 12 is arranged so that the opening/closing edge 12a side (closed end side) is on the downstream side of the outlet flow path. It is installed diagonally to 11.

The gate 13 forms a shutter storage chamber 14 between the members 13 a and 13 b for leaving the shutter 12 out of the outlet flow path 11 , and in the exit flow path 11 , A rectangular opening 15 is formed which is opened and closed by the shutter 12.

On both sides of the passage 15, both the members 13a,
13b, a guide groove 16.16 is provided in the gate 13, into which both sides of the shutter 12 are slidably inserted.

Also, on the closed path side of the shutter 12, between the members 13a and 13b, on the closed path side, there is a connection between the edge of the hole 15 and the downstream side thereof, so that the shutter 12 is closed beyond the edge of the hole. There is a step 17 between the outlet flow path of the hopper (that is, the end surface of the member 13b)
At the position, on both sides of the passage 15, the guide groove 1 is
6.16 is cut away to form a semicircular opening 13C.

The shutter 12 is provided with an air outlet 18 that communicates with the inside on its opening/closing edge 12a, its both side edges, and the front and rear surfaces near the opening edge 12a. An air inlet 19 for introducing pressurized air into the interior of the shutter 12 is opened on one end surface thereof.

Further, a pressure air conduit 20 is opened to the shutter housing chamber 14 and communicated with the air inlet 19 from just before the shutter 12 is closed to when the shutter 12 is fully closed. The end face of the shutter 12 blocks the inside of the storage chamber 14 .

In order to bring the end surface of the shutter 12 into sliding contact with the wall surface of the storage chamber 14 in this manner, the spring plate 21 having a zigzag cross section provided inside the storage chamber 14 functions.

The conduit 20 is connected to the blower via an air conduit 22.
It is connected to the wind raising part of No.4.

In addition, the control wire 2 is attached to the shirt b-12.
One end of the inner wire 23 a of the control wire 23 is connected to the outer tube of the control wire 23 . 2
One end of 3b is inserted into the cable receiving metal fitting 25, and is verified by tightening the bolt 26.

This cable holder 25 is equipped with an L-shaped seat 25a, which suppresses the sealing member 24 and also allows the members 13a, 1
3b are collinearly fixed to the gate 13 by some of the bolts 27 for connecting them to each other.

In the figure, reference numeral 28 is a bracket provided on the hopper 3, and 29 is a bracket connected to the bracket 28 by bolts 30, which is provided on the member 13a.

In such a configuration, the control wire 23
is connected to an operating lever provided near the throttle lever of the engine 5.

Then, when the engine 5 is driven and the blower 4 is operated, an air flow is generated in the discharge passage 9 and is ejected from the tip of the spray tube 9.

At this time, negative pressure is generated in the outlet flow path 11 downstream of the shutter 12 due to the dynamic pressure in the discharge flow path 9.

When the shutter 12 is opened in this state by operating the control wire 23, coarse powder or granular material (agricultural chemicals or fertilizers) flows out from the hopper 3 downstream of the shutter 12, and is spread on the air flow in the discharge channel 9. It is discharged to the outside through the cylinder 8.

Further, when the control wire 23 is operated (the inner wire 23 a is pushed out) and the shutter 12 is closed, the outlet flow path 11 is shut off, and the material supply into the discharge flow path 9 is cut off.

In this case, the shutter 12 is equipped with an air outlet 18 on the closed path side, both sides near this side, and the front and rear surfaces, and the air inlet 19 is connected to the pressure air guide path 20 from just before the shutter 12 closes to when the shutter 12 is completely closed. so that pressurized air from the blower 4 is passed through the air conduit 22 to
Since the powder flows into the shutter 12 and is ejected from the air outlet 18, even if the powder remains stagnant at the guide groove 16, 16 and the step 17 in the gate 13,
This can be blown away just before closing, and the shutter 12 can be completely closed without causing any clogging.

In addition, in this embodiment, when the port 15 is closed by the shutter 12, the negative pressure here is large, and the material on the upstream side that is blocked by the shutter 12 is closed by the shutter 12.
and is brought downstream through the passage 15.

Therefore, no clogging of material occurs upstream of the shutter 12, so that reliable material supply is possible and the operability of the shutter 12 is not hindered.

In addition, since the shutter 12 and the opening 15 are square, there is no risk of material being caught between the side wall of the opening 15 and the opening/closing edge 12a of the shutter 12 on both sides of the opening 15. There is no risk of it becoming locked when closed.

Furthermore, since a step 17 is formed between the port 15 and its downstream side on the closing side of the shutter 12, no jamming occurs between the port 15 and the port 15 when the shutter 12 is closed.

In addition, in the above embodiment, the outlet flow path is made to correspond to the powder flow path, and the shutter provided here is used to block the pneumatic feeding of the material,
The structure of the shutter is used for controlling the flow of material, and the structure of the shutter is applied to the metering valve directly below the hopper that stores the material, so that the air jet from the air outlet blows away the stagnant powder and granules in the vicinity. Naturally, an embodiment in which the downstream discharge path of this metering valve is a powder flow path is also conceivable.

As described in detail above, in a powder or granule flow path that pneumatically transports powder or granule by an air flow, the shutter provided in the powder or granule flow path is configured to be hollow, and the shutter that is provided on the flow path wall is An air outlet is provided at the edge of the shutter that is in contact with the shutter, and means is provided for supplying air into the shutter so that air is ejected from the air outlet when the shutter is closed.
When the shutter closes, it blows away the powder and granules that are stagnant in the vicinity, completely preventing powder and granules from getting caught and clogging when the shutter closes, and maintaining reliable opening and closing operations. It can have practical effects.

[Brief explanation of the drawing]

Figure 1 is an overall front perspective view of the spreader according to this invention, Figure 2
The figure is an enlarged longitudinal sectional front view of the main part, Figure 3 is a view taken along the line A-A in Figure 2, Figure 4 is a view taken along the line B-B in Figure 2, and Figure 5 is a view taken along the line B-B in Figure 2. A sectional view taken along the line CC, and FIG. 6 is a partially exploded perspective view. 1...Material tank, 2...Lid body, 3.
...Hopper, 4...Blower-14a.
...Discharge port, 5...Engine, 6...
... Conduit, 7 ... Bellows pipe, 8 ...
Spray tube, 9...Discharge channel, 10...Connecting pipe, 11...Outlet channel, 12...Shutter, 12a...・Opening/closing edge, 13...
・Gate, 13a13b... Member, 14...
... Shutter containment room, 15 ... Doorway, 16
...Guide groove, 17...Step, 18.
...Air outlet, 19...Air introduction port,
20... Guide path, 21... Spring plate, 22
...Air conduit, 23...Control wire, 23a...Inner wire, 23b.
... Outer tube, 24 ... Seal member, 25 ... Base pipe fitting, 25 a ...
Seat, 26...Bolt, 27...Bolt, 28...Bracket, 29...Bracket, 30...Bolt.

Claims (1)

[Scope of utility model registration request] In the powder flow path where powder and granules are pneumatically conveyed by air flow,
The shutter disposed in the powder flow path is configured to be hollow, and an air outlet is provided at the edge of the shutter in contact with the wall surface of the flow path, so that air is blown out from the air outlet when the shutter is closed. A mechanism for preventing clogging of a part of a shutter in a spreader, which is provided with means for supplying air into the shutter.