JPH0880479A - Cleaning device - Google Patents

Abstract

PURPOSE: To make the resistance to an impeller constant to eliminate the variance in the revolving speed and obtain a cleaning device with its water discharge hole closed by making a cover to discharge the water accumulated in the main body closable and providing a means to automatically open and close the cover with the pressure in the main body. CONSTITUTION: A driving nozzle 6 is provided in a main body 2 to rotate impellers 7. Water is accumulated in the main body 2 when the impeller 7 is rotated, and resistance to the impeller is generated. However, since a closable cover 3 is provided, the cover is opened by an opening and closing means 11 as the pressure (weight) in the main body 2 increases in proportion to the magnitude of pressure, hence the water is discharged, the inside of the main body 2 is kept at the same pressure at all times, and the resistance value exerted on the impeller 7 by the water is kept constant. Further, the cover 3 is opened when the pressure in the main body 2 is increased and the water is discharged, and consequently foreign matter such as a material to be coated does not intrude from the outside.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning device for cleaning by jetting high-pressure water, and more particularly to a cleaning device rotated by an impeller.

[0002]

2. Description of the Related Art As shown in FIG. 5, a cleaning device that rotates while spraying high-pressure water is used for cleaning various tanks and pipes.

In this case, an impeller is provided as a rotating means,
There is a method in which the impeller is rotated by injecting water other than the water for cleaning to the impeller. In these, the impeller is incorporated into the cleaning device, and a hole 30 is provided in the cover 3Z for discharging the jet water, and the jet water is discharged to the outside of the cleaning device through this hole.

However, when the cleaning is not carried out, there is a problem that the object to be cleaned enters into the cleaning device through the hole and causes a rotation failure or, in the worst case, is damaged.

[0005]

The present applicant has previously filed an application for an automatic cleaning device for a horizontal axis concrete mixer, and the present invention intends to further improve the cleaning device used in this previous application. In order to solve the above-mentioned problem, the problem can be solved by closing the hole through which the jet water is discharged, but the inside of the cleaning device is filled with the jet water and becomes high pressure, which increases the resistance of the impeller and prevents the rotation. I knew that.

In view of this point, the present invention provides a cleaning device having a structure in which variations in the number of revolutions are eliminated by making the resistance of the impeller constant and the drainage hole into which the object to be cleaned enters is closed. The purpose is to get.

[0007]

The features of the present invention are a main shaft having a water supply port, a main body rotatable about the main shaft, an impeller for rotating the main body, and high-pressure water for the impeller. A drive nozzle for injecting is integrated with the main shaft, a cover is provided to prevent foreign matter from entering the main body, and high pressure water from the drive nozzle is used to rotate the impeller in the main body to utilize the rotational force of the impeller. A cleaning device for rotating the main body, wherein the cover is made of a member having no notch and can be opened and closed to discharge water accumulated in the main body, and the cover is automatically operated by the pressure in the main body. It is provided with an opening / closing means for selectively opening and closing.

[0008]

In the main body, the impeller and the drive nozzle for rotating the impeller are provided. Inside the main body, water is collected after the impeller is rotated, and the water becomes the resistance of the impeller. The increase in pressure also causes resistance of the impeller. However, according to the present invention, since the cover is openable and closable, the opening and closing means is proportional to the magnitude of the pressure as the pressure (weight) in the main body rises, and the cover is opened to discharge the water. Therefore, the pressure inside the main body is always kept the same, and the resistance value of water acting on the impeller is made constant. Further, since the cover is opened only when the pressure in the main body rises and the water is discharged, there is no possibility that foreign matter such as an object to be cleaned enters from the outside.

[0009]

Embodiments will be described with reference to the drawings. In the examples, a cleaning device used for cleaning the inside of a mixer for kneading green concrete will be described as an example.

FIG. 1 is a vertical sectional view of the present invention.
Is a perspective view. A main body 2 formed in a cylindrical body that rotates around a cylindrical main shaft 1 is provided with a rotation injection nozzle 4 and a revolution injection nozzle 5, and has a cover 3 that can be opened and closed downward. In the main body 2, the main shaft 1 used as a fixed shaft
A drive nozzle 6 formed integrally with the main shaft 1
And an impeller 7 concentrically arranged with respect to the main shaft so as to be rotatable. The end face of the main shaft 1 is provided with a jet water supply port 8 and the jet water is guided to the rotation jet nozzle 4, the revolution jet nozzle 5, and the drive nozzle 6, respectively. The rotation jet nozzle 4 and the revolution jet nozzle 5 are nozzles for washing fresh concrete, which is an object to be washed, and the drive nozzle 6 is based on the revolution jet nozzle 5 and rotation of the main body with the main shaft as an axis. It is a nozzle that rotates (revolves).

The jet water 9 from the drive nozzle 6 rotates the impeller 7 at high speed, and the rotational force of the two nozzles is rotated and revolved through the transmission means.

The jet water 9 accumulates in the main body after converting the energy into the rotation of the impeller. At this time, since the cover 3 that can be opened and closed is provided, the amount of water accumulated in the main body is always constant.

This point will be described in detail. The cover 3 is rotatably attached to the main shaft 1, and the urging means 10 is provided in the central portion.
The opening / closing means 11 having Normally, the cover 3 is in close contact with the bottom surface 12 of the main body 2 by the biasing means 10 to seal the inside of the main body.

On the other hand, at the time of use, when the jet water 9 is jetted from the drive nozzle 6, the main body is sealed by the cover 3 so that water is collected, but when the amount of water increases and the pressure of the water becomes larger than the pressure of the biasing means 10. The cover 3 is pushed down against the force of the biasing means, and a gap δ is generated between the cover 3 and the bottom surface 12 of the main body. A certain amount or more of water accumulated in the main body is automatically discharged through this gap δ, and a certain amount of water is always accumulated in the main body. In this embodiment, the urging hand throw 10 is a coil spring 13, and the amount of water in the main body can be easily changed by changing the spring constant of the coil spring 13.

Since the rotational speed of the impeller 7 depends on the resistance of the water accumulated in the main body of the impeller 7, it is sufficient to control the amount of water accumulated in the main body, and the opening / closing means 11 is controlled by the pressure (weight) of the water. The structure is such that it reacts and acts.

Further, in this embodiment, in order to cause the opening / closing means 11 to react accurately to a constant pressure (weight) in a short time, a small hole 14 is provided in the opening / closing means to guide the outside air into the main body. When the opening and closing means acts with the increase in the amount of water in the body,
This prevents the water in the main body from being discharged at once and the negative pressure in the main body is prevented, whereby the urging means 10 can always be operated under the same conditions. The position of the small hole 14 is preferably in the vicinity of the rotation axis of the impeller 7 where water is likely to be scattered in the radial direction due to the high-speed rotation of the impeller 7 and become negative pressure.

Further, in order to change the absolute rotational speed of the impeller (rotational speed when there is no water resistance), it is sufficient to change the diameter of the drive nozzle and change the injection force. Various rotation speeds can be set by combining with the change of.

[0018]

With the above structure, the resistance value acting on the impeller is always kept constant, and the rotation speed of the main body can be kept at a desired constant rotation.

As a result, there is a remarkable effect that the object to be cleaned can be uniformly cleaned.

Also, stable rotation can be obtained even in a place where the environment of use is poor, and a device with good durability can be obtained.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of the present invention.

FIG. 2 is an overall perspective view of the present invention.

FIG. 3 is an enlarged perspective view of a partially crushed cover portion of the present invention.

FIG. 4 is a partial perspective view showing an operating state of the present invention.

FIG. 5 is a crushing sectional view of a cover portion of a conventional device.

[Explanation of symbols]

 1-Main spindle 2-Main body 3.3Z-Cover 6-Drive nozzle 7-Impeller 11-Opening / closing means

Claims (4)

[Claims] 1. A main shaft having a water supply port, a main body rotatable around the main shaft, an impeller for rotating the main body, and a drive nozzle for injecting high-pressure water to the impeller are integrated into the main shaft. And a cover to prevent foreign matter from entering the main body,
A cleaning device for rotating an impeller by high-pressure water from a driving nozzle in the main body to rotate the main body by using the rotational force of the impeller, wherein the cover is made into a member having no notch and accumulated in the main body. A washing device, which is openable and closable for discharging water and is provided with an opening and closing means for automatically opening and closing the cover by the pressure in the main body. 2. The cleaning apparatus according to claim 1, wherein the opening / closing means has a biasing means. 3. The cleaning device according to claim 1, wherein the opening / closing means includes a small hole for allowing air to flow into the main body. 4. The cleaning apparatus according to claim 1, wherein the drive nozzle includes an adjusting unit that adjusts an injection amount.