JPH0711776Y2 - Foreign matter removal device for screen - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a foreign matter removing device for a screen, which is disposed at an inlet of a blower of a speed sprayer and blocks the passage of foreign matter. The present invention relates to a foreign matter removing device for a screen, which can remove the foreign matter.

[Conventional technology]

In the speed sprayer, in order to prevent foreign matter such as fallen leaves and vinyl from entering the blower, a screen is arranged on the suction side of the blower and hooks the foreign matter to prevent passage.

The adherence of foreign matter to the screen causes a decrease in the blowing capacity of the blower and problems such as uneven spraying. Therefore, it is necessary to remove foreign matter on a regular basis. 56-43417 publication), a device for removing foreign matter and the like attached to the screen is not provided,
A worker manually removes foreign matters and the like attached to the screen.

[Problems to be Solved by the Invention] As described above, in the conventional speed sprayer, it is necessary to manually remove the foreign matter adhering to the screen. Therefore, it is troublesome and the removal work is performed by the speed sprayer. Since it is difficult to perform the chemical liquid spraying operation in parallel, it is necessary to interrupt the spraying operation, and the efficiency of the spraying operation is reduced.

An object of the present invention is to provide a foreign matter removing device for a screen, which can remove foreign matter from the screen while the fluid is passing through the screen without any manual work.

[Means for Solving the Problems]

The invention will be described using the reference numerals of the drawings corresponding to the embodiments.

The screen (32), which is the premise of the foreign matter removing device for a screen of the present invention, is arranged in the fluid passage portion and blocks passage of foreign matter (56) in the fluid. In the foreign matter removing device for a screen of the present invention, the screen (32) is composed of hollow members (41, 42). The spout hole (44) has a screen (3
Hollow members (41, 42) in the flow direction of the fluid in 2)
Is drilled on the upstream surface of the. Fluid source for removing foreign matter (4
8) communicates with the ejection hole (44) through the hollow members (41, 42) and delivers the foreign matter removing fluid to the ejection hole (44).

[Action]

When the fluid source for foreign matter removal (48) is in communication with the ejection hole (44), the fluid for foreign matter removal is the fluid source for foreign matter removal (48).
Is guided to the ejection hole (44) through the hollow members (41, 42) and ejected from the ejection hole (44) toward the upstream side of the screen (32). As a result, the foreign matter (56) attached to the screen (32) is blown off and the screen (32)
Separate from.

〔Example〕

 The present invention will be described below with reference to the embodiments shown in the drawings.

FIG. 4 is a side view of the speed sprayer 10. The speed sprayer 10 can be moved forward and backward by driving the front wheels 12 and the rear wheels 14, and an operator can get in the speed sprayer 10 to move forward and backward.
A driver's seat 16 for driving and operating, a chemical liquid tank 18 for storing the chemical liquid therein, an engine room 20 for accommodating machines such as an engine and a pump, and a nozzle 22 for ejecting the chemical liquid to the surroundings are arranged along the peripheral portion. The jet nozzle 24 and the blower 26 that sucks air from the rear and discharges the air to the nozzle nozzle 24 are provided in order from the front side. The blower 26 includes a wind tunnel 28 that covers the sides and the upper side, and a moving blade 30 that is disposed in the wind tunnel 28 and that sucks air from the rear by rotation and discharges the air to the jet nozzle 24, and the screen 32 includes the blower 26. Of the wind tunnel 28, that is, the rear side opening of the wind tunnel 28.

FIG. 5 is a perspective view showing the wind tunnel 28 and the screen 32 with the screen 32 removed from the wind tunnel 28. screen
32 is a plurality of ring portions that are concentrically arranged and extend in the circumferential direction.
34, and a plurality of radiating portions 36 extending in the radial direction and connecting the ring portions 34 to each other. The mounting portion 38 is fixed to the outer end portion of the radiating portion 36, and the bolt 40 is inserted into the mounting portion 38 and screwed onto the end surface of the wind tunnel 28 to detachably fix the screen 32 to the wind tunnel 28. .

1 is a view showing the screen 32 as viewed from the rear of the speed sprayer 10 and a device for supplying pressurized air to the screen 32, and FIG. 2 is a sectional view taken along the line II-II of FIG.
Each ring portion 34 consists of one ring pipe 41, and each radiating portion 36
Is composed of a plurality of straight pipes 42 that mutually connect the ring portions 34 that are adjacent to each other in the radial direction of the screen 32. Spout hole 44
Are provided at appropriate intervals on the surfaces of the annular pipes 41 and the straight pipes 42 on the air intake side so as to be distributed over the entire screen 32. As shown in FIG.
The communication hole 46 is formed in the connecting surface of the annular pipe 41 with each linear pipe 42, and the annular pipes are connected to each other.
41 and the hollow space of the straight pipe 42 communicate with each other,
As a result, all the annular pipes 41 and the straight pipes 42 of the screen 32 are in communication with each other. In FIG. 1, the electric compressor 48 is connected on the discharge side via a hose 50 to the outer end of a predetermined radiating section 36. switch
52 is disposed in the driver's seat 16 of the speed sprayer 10,
It is turned on and off by the driver of the driver's seat 16 to control the supply of electric power of the battery 54 to the electric compressor 48.

FIG. 3 shows a state in which the fallen leaves 56 of the screen 32 are caught. Along with the operation of the blower 26, air is sucked from the rear of the speed sprayer 10 and foreign matter such as the fallen leaves 56 and vinyl are sucked in with it, and the fallen leaves 56 and the like are caught by the screen 32 and enter the blower 26. Be blocked.

The operation of the embodiment will be described.

As the blower 26 is in operation, the screen 32 has a ring 34
Foreign matter, such as, adheres (Fig. 3), and this is the blower 26 of the spout 24.
This causes a decrease in the amount of air that carries the spray of the chemical solution from the machine and uneven spraying. When the operator determines that it is necessary to remove the fallen leaves 56 and the like from the screen 32, the switch 52 on the driver's seat 16
Is turned on and the electric compressor 48 is driven. The electric compressor 48 may be driven while the speed sprayer 10 is running and the blower 26 is running. Electric compressor 48
Driven by, the pressurized air is discharged from the electric compressor 48, is supplied to the screen 32 via the hose 50, and is distributed to all the annular pipes 41 and the straight pipes 42 of the screen 32. Then, the air is ejected from the ejection holes 44 distributed over the entire screen 32 in the direction opposite to the air suction direction of the blower 26. This allows screen 32
Leafs and the like adhering to the are sprayed off behind the speed sprayer 10 and removed from the screen 32.

In the illustrated embodiment, the foreign matter removal device is a speed sprayer.
The screen 32 of the speed sprayer 10 has been described above.
Besides, it can be applied to, for example, an insect screen installed in a radiator that radiates heat of engine cooling water.

In the illustrated embodiment, pressurized air is used to remove foreign matter, but a fluid such as high pressure water may be ejected.

In the illustrated embodiment, the screen 32 is a mesh, but the screen 32 may be composed of a plurality of bars parallel to each other, and the structure of the screen to which the present invention is applied is arbitrary.

[Effect of device]

In this invention, the screen is composed of a hollow member, and the ejection hole is formed in the upstream surface of the hollow member so that the foreign matter removing fluid is supplied from the foreign matter removing fluid source to the ejection hole through the hollow member. The foreign matter adhering to the screen is blown off by ejecting from the ejection hole. Therefore, it is possible to omit the removal of the foreign matter from the screen by hand, which simplifies the removal of foreign matter while the fluid is passing through the screen.

[Brief description of drawings]

1 is a view showing a screen as seen from the rear of a speed sprayer and showing a supply device of pressurized air to the screen, and FIG. 2 is a II of FIG.
-A cross-sectional view taken along the arrow II, Fig. 3 is a view showing a state in which fallen leaves of the screen are caught, Fig. 4 is a side view of the speed sprayer, and Fig. 5 is a wind tunnel and the screen with the screen removed from the wind tunnel. FIG. 32 …… screen, 41 …… annular pipe (hollow member), 42
…… Straight pipe (hollow member), 44 …… Spout hole, 48 ……
Electric compressor (fluid source for removing foreign matter), 56 ... Fallen leaves (foreign matter).

Claims (1)

[Scope of utility model registration request] 1. A foreign matter (5
In the screen (32) for preventing passage of 6), the screen (32) is composed of hollow members (41, 42), and the ejection holes (44) are the hollow members with respect to the fluid flow direction in the screen (32). The foreign matter removing fluid source (48) is provided on the upstream surface of the (41, 42), and
A foreign matter removing device for a screen, characterized in that the foreign matter removing fluid is sent to the jet hole (44) by communicating with the jet hole (44) through the inside of the nozzle (1, 42).