JPS6214982A - Tank washer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a device for cleaning a tank, and more particularly to a device for cleaning the inner surface of a tank that opens upward.

(Prior Art) In conventional paint manufacturing plants, a method is widely adopted in which raw materials such as pigments, resins, and solvents are put into a fixed tank and mixed by stirring using a disilver to obtain a paint product. The above-mentioned fixed tanks were installed in large numbers for each type of raw material, such as resin or solvent, and there was no need to clean the tanks very often. It was operated manually.

(Problem to be solved by the invention) Recently, however, with the diversification of properties required for paints, the number of types of paint raw materials such as resins and solvents has increased rapidly, and the number of fixed tanks installed has increased. This cannot be dealt with unless the width is increased significantly, and this requires a vast floor space, which is particularly inconvenient in paint manufacturing factories that produce a wide variety of products in small quantities. A method to solve this problem is to use multiple portable tanks, which are sequentially transported to a raw material preparation station, a stirring station, and a filling station where products are filled into cans.Then, the tanks are cleaned and circulated to the above process. If used, a wide variety of paints can be efficiently produced in a small floor space, which is extremely desirable. However, in this case, each tank must be cleaned at the end of each manufacturing cycle, which requires frequent cleaning operations, and conventional manual methods require labor-intensive work under adverse conditions in an atmosphere where solvents evaporate. It lasts for a long time and cannot be performed on the lateral side.

The present invention aims to solve the above-mentioned problems, and provides a tank cleaning device that can easily clean a tank without requiring manual labor.

(Means for Solving the Problems) However, the tank cleaning device of the present invention includes a support base for supporting a tank with an opening facing upward, a base frame fixed above the support base, and the base frame. an elevator frame that is guided so as to be vertically movable; an elevator frame drive device that drives the elevator frame up and down; a cover that is attached to the elevator frame in a state facing the opening of the tank on the support base; and the cover. a rotating shaft that penetrates through the center of the cover and is rotatably supported by the lifting frame with its axis directed in the vertical direction; a rotating shaft drive device that rotationally drives the rotating shaft; and a rotating shaft drive device that is attached to the rotating shaft below the cover. This is a tank cleaning device comprising a brush provided with a brush, a liquid supply port disposed on the lower side of the cover, and a cleaning liquid supply device connected to the liquid supply port and supplying cleaning liquid to the liquid supply port.

(Function) In the tank cleaning device of the present invention, the tank is placed on the support base, the lifting frame is driven by the lifting frame drive device and lowered, the cover covers the opening of the tank, and the brush is inserted into the tank. The cleaning liquid supplied by the cleaning liquid supply device is discharged into the tank from the liquid supply port,
The brush rotates together with the rotating shaft driven by the rotating shaft drive device while slidingly contacting the inner surface of the tank, thereby cleaning the inner surface of the tank. After cleaning, the operation of the cleaning liquid supply device and the rotating shaft drive device is stopped, and the lifting frame and the cover, brush, etc. attached to the lifting frame are raised and removed from the tank by the lifting frame driving device. The cleaning waste liquid may be discharged to the outside through a discharge port provided at the bottom of the tank, or by pump suction from the upper opening if such a discharge port is not provided.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

FIG. 1 shows a plan view of a cleaning line 1 in which two cleaning devices of the present invention are installed. A tank cleaning device 4a is installed above the same chain conveyor 3b, and a tank cleaning device 4b for finishing cleaning is installed above the same chain conveyor 3b. 5 is a lifting platform equipped with free rollers for receiving tanks; 6 is a similar lifting platform for sending out tanks; 7 is a chain conveyor for traversing; 8 and 9 are lifting platforms equipped with short chain conveyors; is the chain conveyor 3a.

Together with 3b, it forms a conveyor line 10 that conveys the tank 2 along a U-shaped path. Tank cleaning device 4a
The detailed structure is as shown in FIGS. 3 and 4, in which an elevating frame 14 is guided in a vertically extending manner by guide rails 13 extending vertically on a base frame 12 fixed to an architectural beam 11 of the building. This lifting frame 14 is connected by a chain 15 to a balance weight 16 arranged laterally, and this chain 15 is connected to a sprocket 17 and a sprocket 16 pivotally supported on the base frame 12.
The drive shaft 1 is wrapped around the drive shaft 8 and has the sprocket 17 fixed to it.
First, it is driven in forward and reverse directions via a chain 23 by an elevating frame drive device 22 comprising a motor 20 and a speed reducer 21 mounted on the base frame 12. 25 is lift frame 1
4 is a short cylindrical cover that opens downward directly below the lifting frame 14, facing the opening 2a of the tank 2 stopped on the chain conveyor 3a (see FIG. 1). On the lower surface of the cover 25, liquid supply pipes 26 and 27 bent into ring shapes with different diameters are arranged and fixed concentrically to the center of the cover 25, and each of these liquid supply pipes has a plurality of pipes extending downward. A liquid supply 028 is provided. Note that the liquid supply pipes 26 and 27 are connected to the hose 2 as shown in FIG.
Via a piping system 32 with 9 and solenoid valves 30, 31, it is connected to a liquid supply device 35 consisting of a solvent tank 33 and a pump 34. Also, in Fig. 3, 258 is the cover 2.
The exhaust port provided at 5 is connected to an exhaust device (not shown) through a duct 36. A rotating shaft 37 is rotatably supported by the lifting frame 14, passes through the cover 25, and its axis is directed in the vertical direction. It is designed to be rotationally driven. A bushing 43 is fitted onto the rotating shaft 37 so as to be able to move up and down and rotate freely, and is driven up and down via a connecting plate 45 by a cylinder 44 attached to the lifting frame 14, and is fixed to the other end of the connecting plate 45. The guide bush 46 is a guide rod 4 fixed to the lifting frame 14.
7 in a freely movable manner. A bushing 48 is fitted on the rotary shaft 37 so as to be freely raised and lowered, and is connected by a connecting plate 50 to a ring 49 that is rotatably fitted on the bushing 43 . Reference numeral 51 denotes a brush in which thin wires are implanted along a part of the inner wall surface and the bottom surface of the tank 2, and the brush 51 is connected to a link 53 pivoted to an ear piece 52 fixed to the rotating shaft 37 and a link 54 pivoted to the ring 49. a link mechanism consisting of a link 56 and a bush 48 pivotally connected to a lug 55 fixed to the rotating shaft 37;
It is mounted so as to be movable in the horizontal direction with respect to the rotating shaft 37 by a link mechanism consisting of a link 57 pivotally connected to the rotary shaft 37 . Reference numeral 58 denotes a brush for cleaning the bottom of the tank, which is fixed to the lower end of the rotating shaft 37 and extends in the diametrical direction of the tank.

Further, as shown in FIG. 2, the tank 2 is fixed to a support frame 61 fixed to a rectangular bottom frame 60 forming a pallet for transportation. Reference numeral 62 denotes an on-off valve consisting of a globe valve connected to an outlet provided at the bottom of the tank 2. Reference numeral 63 denotes an opening/closing mechanism for the opening/closing valve 62, in which bins 6 are arranged in a cross shape at both ends of a rotating shaft 64 extending in the horizontal direction and rotatably supported by the supporting frame 61.
5 is fixed in a protruding manner, and a bevel gear 66 fixed near the center of a rotating shaft 64 is meshed with a bevel gear 67 fixed to a valve element drive shaft of an on-off valve 62. Also, 69 is a tank cleaning device 4a.
This is a receiving tray for collecting cleaning waste liquid disposed directly below the tank, and is connected to the solvent tank 33. Reference numeral 70 denotes an opening/closing operation device for the opening/closing valve 62 of the tank 2. A shaft 74 driven by a motor 73 is rotatably supported on a cart 72 which is supported by a machine frame 71 so as to be movable in the horizontal direction. Disc 7 fixed at the tip
5 has two bottles 76 protruding from the opening/closing mechanism 63 of the tank 2.
It is designed so that it can be engaged with and detached from the bottle 65 of.

On the other hand, the tank cleaning bag fa4b for finishing cleaning has almost the same structure as the tank cleaning device 4a for rough cleaning, except that the outlet of the solvent tank 33 is connected to the tank cleaning device for rough cleaning through piping 80. The only difference is that the pump 34 is connected to the inlet side of the solvent 133 of 4a, and the suction port of the pump 34 is connected to the solvent tank containing the new solvent.

In order to clean the tank 2 with the apparatus configured as described above, the tank 2, which is integrated with the bottom frame 60 with paint etc. adhered to its inner surface, is placed on the lifting platform 5 using an automatic guided vehicle or forklift, and then placed on the chain conveyor 3a. The tank is then transferred to a tank cleaning device 14a for rough cleaning. When the fixed position stop of the tank 2 is detected by a limit switch or the like, the lifting frame drive device 22 is activated to lower the lifting frame 14 and remove the cover 2.
5 is placed over the opening 2a of the tank 2, the brushes 51 and 58 are inserted into the tank 2, and the lower side of the brush 51 and the brush 58 contact the bottom surface of the tank 2.

Next, the cylinder 44 is connected to the connecting plate 4 according to the inner diameter of the tank 2.
5 is driven downward, pushing down the bushes 43 and 48 to bring the side of the brush 51 into contact with the inner surface of the tank 2. Next, the liquid supply device 35 is started, and the liquid supply port 28 of the liquid supply pipe 26 or 27 on the side closer to the inner wall surface of the tank depending on the inner diameter of the tank 2 is activated.
A solvent, which is a cleaning agent, is spouted out, and together with this, the rotating shaft 37 is rotated at a low speed by the rotating shaft drive device 40, and the brushes 51 and 58 rotate while slidingly contacting the inner surface of the tank 2, thereby cleaning the inner surface of the tank. At this time, the cover 25 covers the opening 2a of the tank 2 to prevent the solvent from flying away. After cleaning for a predetermined period of time by a timer, the opening/closing operation device 70 operates to move the trolley 72 forward toward the tank 2, and the bin 76 rotating together with the shaft 74 engages with the bin 65 in the opening/closing groove 63 of the tank to open the opening/closing valve. 62, the dirty solvent is discharged from the tank 2 and returns to the solvent tank 33 via the receiving tray 69. Next, liquid supply device 3
5 and the rotating shaft drive device 40 are stopped, the brush 51 is retracted to the rotating shaft 37 side by the cylinder 44, the lifting frame 14 is raised together with each brush, cover 25, etc. by the lifting frame driving device 22, and the opening/closing operation device The on-off valve 62 at the bottom of the tank 2 is closed by 70, and the rough washing is completed. The solvent in the solvent tank 33 is recycled while the degree of contamination is low, and when the degree of contamination becomes high, it is discharged to the outside of the tank and is replenished with cleaning waste liquid from the tank cleaning device 4b for final cleaning.

After rough washing, the tank 2 is transferred via the chain conveyor 3a17 to the chain conveyor 3b directly below the tank cleaning device 4b for final washing, where it stops, and the inside of the tank is cleaned using a new solvent in the same manner as above. It will be done. Thereafter, the tank 2 transferred onto the lifting platform 6 by the chain conveyor 3b is picked up by an automatic guided vehicle, a forklift, etc., and the cleaning process for one tank 2 is thus completed.

The operation of each device in the above process can be performed automatically by sequence control using timers and limit switches, or computer program control using the tank inner diameter as one of the input values, eliminating the need for manual cleaning work. As a result, significant labor savings can be achieved.

The present invention is not limited to the above-mentioned embodiment. For example, in the above-mentioned embodiment, the brush 51 is movable in the diametrical direction of the tank, and the opening position is changed according to the inner diameter of the tank. It is convenient for cleaning different types of tanks, and it is preferable that the solvent attached to the brush does not splash when the brush is inserted into or removed from the tank, but if there is only one type of tank, rotate the brush 51@! 13
It may be fixed to 7. In addition, in the above embodiment, a chain conveyor was used as a support stand to support the tank, and two stages of cleaning, rough washing and final washing, were performed. A fixed stand fixed on the foundation or an elevating stand may be used as the stand. Further, as the cleaning liquid for cleaning, in addition to a solvent, water, steam, etc. can be used in the case of a water-based paint.

The above description has been about cleaning tanks for manufacturing paints, but this invention also applies to cleaning tanks used for manufacturing dyes, chemicals, foods, etc.
It can be applied to various tank cleaning devices.

(Effects of the Invention) As explained above, according to the present invention, the inner surface of the tank is cleaned by the brush that is moved up and down and rotated, so that the tank can be easily cleaned without requiring any manual labor. This greatly contributes to labor saving.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the entire cleaning line showing an embodiment of the present invention, FIG. 2 is a partial sectional view taken along the line A-A in FIG. 1, FIG. The figure is also a partially cutaway plan view. 2...tank, 2a...opening, 3a, 3b...
Chain conveyor, 4a, 4b...tank cleaning device,
7... Chain conveyor, 12... Base frame, 13...
- Guide rail, 14... Elevating frame, 15... Chain, 17.18... Sprocket, 19... Drive shaft, 22... Elevating frame drive device, 23... Chain, 2
5...Cover, 26.27...Liquid supply pipe, 28...
Liquid supply port, 32... Piping system, 35... Liquid supply device, 3
7... Rotating shaft, 40... Rotating shaft drive device, 41...
- Chain, 43... Bushing, 44... Cylinder, 45... Connecting plate, 48... Bushing, 49...
Ring, 50... Connecting plate, 51... Brush, 53.
54.56.57...Link, 58...Brush.

Claims (1)

[Claims] A support base that supports a tank with an opening facing upward, a base frame fixed above the support base, an elevator frame that is guided by the base frame so as to be able to rise and lower, and an elevator frame that drives the lift frame up and down. a drive device, a cover attached to the lifting frame facing the opening of the tank on the support base, and a cover that passes through the center of the cover and is rotatably attached to the lifting frame with its axis vertically oriented; a supported rotating shaft, a rotating shaft driving device that rotationally drives the rotating shaft, a brush attached to the rotating shaft below the cover, and a liquid supply port disposed below the cover; A tank cleaning device comprising: a cleaning liquid supply device connected to the liquid supply port and supplying cleaning liquid to the liquid supply port.