JPH0587313B2 - - Google Patents

Description

[Detailed Description of the Invention] <<Industrial Application Field>> The present invention relates to an automatic cleaning device for cleaning the inner circumferential surface of a hopper, and particularly for automatically cleaning the inner circumferential surface of a spray dryer that produces ceramic raw material powder. The present invention relates to a self-propelled cleaning device.

<<Prior Art>> As a conventional device for cleaning deposits adhering to the inner peripheral surface of a hopper, there is a device disclosed in, for example, Japanese Utility Model Application Publication No. 123291/1983.

A header is rotatably attached to a high-pressure water conduit pipe, and a cleaning tool with a high-pressure water jet nozzle and a high-pressure water spout for rotational driving formed on the circumferential side of the header is inserted into the hopper. By jetting out high-pressure water at the hopper, deposits adhering to the inner circumferential surface of the hopper are removed.

By the way, in the case of a spray dryer that manufactures ceramic raw material powder, ceramic raw material powders with different components are manufactured using the same spray dryer, but the ceramic slurry supplied to the spray dryer contains a paste-like component as a binder. Because of this, the deposits that adhered and dried on the inner wall of the spray dryer due to the jetting force had a strong adhesion force and could not be completely removed by jetting high-pressure water. If the ceramic raw material adhering to the inner peripheral surface of the spray dryer is not completely removed, other ceramic raw material powder adhering to the wall surface will be mixed into the ceramic raw material powder after replacement, resulting in a decrease in product purity. The problem is that.

Therefore, in the case of a spray dryer for producing ceramic raw material powder, the current situation is for a worker to enter the spray dryer with a cleaning tool such as a mop and manually clean the inner circumferential surface of the spray dryer.

《Problems to be solved》 However, having a worker enter the spray dryer to clean it creates a poor working environment and poses a hygiene problem, and the spray dryers used to produce ceramic raw material powder have an inner diameter of several meters. ,
Since it is a large product with a height of over 10 meters, when cleaning it manually, for example, in the case of a spray dryer with an inner diameter of 7.4 m, an overall height of 11 m, and a straight cylinder part height of 4.5 m, it is necessary to clean only the inner surface of the straight cylinder part.14 There was a problem in that it required many hours of work time and the production efficiency of the ceramic raw material powder was reduced.

The present invention has been made in view of these points, and it is an object of the present invention to provide a self-propelled cleaning device that can efficiently remove deposits adhering to the inner wall surface of a hopper such as a spray dryer.

<<Means for Solving the Problems>> In order to achieve the above-mentioned object, the present invention arranges a guide rail along the circumferential direction on the inner peripheral surface of the hopper, and drives the washing machine unit on this guide rail. The washing machine unit is formed by a traveling drive section that holds both sides of the guide rail between rotating rollers, and a cleaning section placed below the traveling drive section, and the cleaning section is equipped with a cleaning liquid spray nozzle and a washing section. The hopper is characterized in that a rotary brush that can be driven and rotated around a vertical axis is arranged so that the inner circumferential surface of the hopper is cleaned by the rotary brush arranged in the washing section as the washing machine unit moves.

<<Operation>> In the present invention, a guide rail is disposed along the circumferential direction on the inner circumferential surface of the hopper, a washing machine unit is suspended and supported on this guide rail so as to be movable, and the washing machine unit is mounted on both sides of the guide rail. It is formed by a traveling drive part whose surface is held between rotating rollers and a cleaning part arranged below the traveling drive part, and the cleaning part has a cleaning liquid spray nozzle and a rotary brush that can be driven and rotated about a vertical axis, As the cleaning unit moves, the rotating brush placed in the cleaning section cleans the inner circumferential surface of the hopper.
Since the deposits are moistened with the cleaning liquid and the wet deposits are wiped off with a rotating brush, the deposits attached to the inner wall surface of the hopper are removed from the hopper wall surface, and the inner wall surface of the hopper becomes clean.

Moreover, since the cleaning machine unit moves automatically while being guided by guide rails, the worker does not have to stay inside the hopper during cleaning work, which improves the working environment for the worker. .

<<Embodiment>> The drawings show an embodiment of the present invention, and FIG. 12 is a side view of the washing machine unit 1, and FIG. 2 is a front view thereof.

This washer unit 1 is configured to be removably attached to an inner wall surface 3 of a straight cylindrical portion of a spray dryer 2. spray dryer 2
Guide rails 4 are arranged on the inner circumferential surface 3 in two stages, upper and lower, along the circumferential direction. Each guide rail 4 is formed in a ring shape with a part cut out,
Limit switch dogs are formed at both ends of each guide rail 4.

The washing machine unit 1 is formed of a traveling drive section 6 that runs across a guide rail 4 while holding both side surfaces 5 of the guide rail 4, and a cleaning section 7 suspended below the traveling drive section 6. be. As shown in FIGS. 3 to 5, the travel drive unit 6 has a base frame 8 and a movable table 9 that moves horizontally on the base frame 8. Base frame 8
A slide shaft 13 and a ball screw 14 connect a tip block 11 that rotatably supports a pair of free rollers 10, 10 around a vertical axis and a base block 12 that supports a cleaning section 7, which will be described later. A movable table advancement/retraction drive motor 15 for rotationally driving a ball screw 14 is fixed to the base block 12. The movable base 9 is configured so that it can move forward and backward in the horizontal direction with respect to the base frame 8 using a slider 16 that is fitted onto the slide shaft 13 of the base frame 8 and a nut block 17 that engages with the ball screw 14. a drive roller 18 rotating about a vertical axis;
The drive roller 18 is supported by a travel drive gear motor 19 and a power transmission device 21 comprising a pair of bevel gears 20, 20. The free rollers 10, 10, which are pivotally supported on the tip block 11 of the base frame 8, roll along the circumferential surface (outer circumferential surface) of the guide rail 4 facing the inner circumferential surface 3 of the spray dryer 2. The drive roller 18 supported by the movable table 9 is placed in a position where it contacts the inner circumferential surface of the guide rail 4 at a location corresponding to between the pair of free rollers 10, 10. There is.

Therefore, by moving the movable table 9 toward the base frame 8, the pair of front and rear free rollers 10,
10 and one drive roller 18 to form a guide rail 4
The moving platform 9
The travel drive unit 6 is moved in the horizontal direction along the guide rail 4 by the operation of the travel drive gear motor 19 supported by the travel drive gear motor 19 .

As shown in FIG. 6, the cleaning section 7 is composed of a rolling roller support frame 22 and a cleaning brush holding frame 23. A rolling roller 25 that rolls on the upper surface of the guide rail 4 is rotatably supported around a horizontal axis at the tip of the fixed arm 24 that was previously advanced, and the above-mentioned traveling drive unit is attached to this rolling roller support frame 22. 6 are connected and supported in a swingable manner. The cleaning brush holding frame 23 is formed to be vertically long below the rolling roller supporting frame 22 and perpendicular to the rolling roller supporting frame 22. A pair of upper and lower brush support arms 27 and 28 extend horizontally from the left and right sides of the brush support arm 26, respectively, and each arm 27 and 28 has a rotary brush 29 attached thereto.
is arranged in a rotatable manner.

In one brush support arm 27, the upper and lower arms 27a and 27b support the core shaft 3 of the first rotating brush 29a.
0 rotatably supported, and the lower arm 27b
A first brush drive motor 31 fixed to and a brush core shaft 30 are connected by a belt transmission device 32 disposed within the lower arm 27b. In addition, in the other brush support arm 28, second rotating brushes 29b and 29c are arranged above the upper arm 28a and below the lower arm 28b, respectively, and both the second rotating brushes 29b and 29c are rotated in common. A second brush drive motor 34 fixed to the shaft 33 and fixed to the lower arm 28b and the rotating shaft 33 are interlocked by a belt transmission mechanism 35 disposed inside the lower arm 28b. The first rotating brush 29a and the two second rotating brushes 29b and 29c are
In side view, the upper end of the rotating brush 29a is the lower end of the upper second rotating brush 29b, and the lower end of the first rotating brush 29a is the upper end of the lower second rotating brush 29c. It's starting to wrap.

Further, although not shown in the drawings, in this cleaning section 7, a cleaning liquid spray nozzle is arranged on the outer side of the first rotating brush 29a.

In the washing machine unit 1 configured as described above,
When changing products in the spray dryer 2, the washing machine unit 1 is carried into the spray dryer 2 using an overhead traveling crane 37, and the traveling drive section 6 of the washing machine unit 1 is placed on the guide rail 4. When engaged, the motor 1 for driving the moving table forward and backward
5 is activated to press the drive roller 18 against the guide rail 4, thereby suspending and supporting the washing machine unit 1 on the guide rail 4. Then, since the cleaning unit 7 is swingably connected to the drive unit 6, the cleaning unit 7 swings toward the inner circumferential surface 3 of the spray dryer 2 due to its own weight, and the rotating brush 29 of the cleaning unit 7 rotates. It comes into contact with the inner peripheral surface of the spray dryer 2. In this state, the cleaning liquid is ejected from the cleaning liquid jetting nozzle toward the inner circumferential surface 3 of the spray dryer 2 according to a command from the control device 38, and
Travel drive motor 19 and both brush drive motors 3
1 and 34 are operated synchronously, the cleaning machine unit 1 is automatically run along the guide rail 4, and the deposits adhering to the inner circumferential surface 3 of the spray dryer 2 are wiped off by the rotating brush 29. When the limit switch detects that the washer unit 1 has reached one end of the guide rail 4, the traveling drive motor 19 is reversely rotated based on the detection signal, and moves backward along the guide rail 4 to return to its original position.

Reference numeral 36 in the figure is a platform installed on the inner peripheral surface of the spray dryer 2, which serves as a foothold for the operator when setting the washing machine unit 1 on the guide rail 4.

In the above embodiment, a device for cleaning the inner circumferential surface of the spray dryer 2 was described, but it is also used to remove deposits attached to the inner circumferential surface of a hopper or a tank having a large diameter cylindrical portion outside the spray dryer 2. It can be used in cleaning equipment.

<<Effects>> In the present invention, a guide rail is disposed along the circumferential direction on the inner circumferential surface of the hopper, a washing machine unit is suspended and supported on this guide rail so as to be movable, and the washing machine unit is mounted on both sides of the guide rail. It is formed by a traveling drive part whose surface is held between rotating rollers and a cleaning part arranged below the traveling drive part, and the cleaning part has a cleaning liquid spray nozzle and a rotary brush that can be driven and rotated about a vertical axis, As the cleaning unit moves, the rotating brush placed in the cleaning section cleans the inner circumferential surface of the hopper.
The cleaning liquid moistens the deposits, and the wet deposits are wiped off with a rotating brush, so the deposits that have adhered to the inner wall of the hopper are removed from the hopper wall, making it possible to clean the inner wall of the hopper. .

Moreover, since the cleaning machine unit moves automatically guided by guide rails, the operator does not have to stay inside the hopper during cleaning work, improving the working environment for the operator and increasing safety. , and the inner peripheral surface of the hopper can be cleaned hygienically.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a side view of the washing machine unit, FIG. 2 is a front view thereof, FIG. 3 is a perspective view of the drive section, and FIG. 4 is a side view of the drive section. 5 is a plan view of the driving section, FIG. 6 is a perspective view of the cleaning section, and FIG. 7 is a conceptual diagram of the cleaning device. DESCRIPTION OF SYMBOLS 1...Washing machine unit, 2...Hopper, 3...Inner peripheral surface of 2, 4...Guide rail, 6...Travel drive unit, 7
...Cleaning section, 10, 18...Rotating roller, 29...Rotating brush.

Claims (1)

[Scope of Claims] 1. A guide rail 4 is disposed along the circumferential direction on the inner circumferential surface 3 of the hopper 2, and the washer unit 1 is suspended and supported on the guide rail 4 so as to be movably driven. 1 is formed by a travel drive section 6 which holds both sides of the guide rail 4 between rotating rollers 10 and 18, and a cleaning section 7 arranged below this travel drive section 6. A rotary brush 29 that can be driven and rotated around an axis is disposed, and the inner circumferential surface of the hopper 2 is cleaned by the rotary brush 29 disposed in the cleaning section 7 as the washer unit 1 moves. Characteristics of the hopper inner wall cleaning device 2 The hopper inner wall cleaning device according to claim 1, wherein the hopper 2 is a spray dryer.