JP5072451B2 - Quantitative and stable supply equipment for particulate matter - Google Patents

Description

The present invention relates to a quantitative and stable supply device used when supplying a granular chemical that is mixed in a coating processing solution and coagulated so as to easily separate paint sludge or defoamed.

The main purpose of the spray booth for painting is to suck and collect unnecessary paint mist generated when spraying paint, etc., and most of them use treated water because of its high collection efficiency. A method of capturing paint mist is used. The treated water used for collecting paint mist is configured to circulate and use as a water flow film or shower water, and the collected paint mist is separated and recovered in the water tank and recycled as collected treated water. .

The paint mist taken in the treated water is aggregated in water so as to be easily separated, and a drug is mixed as an effective means. In general, this chemical contains a large amount of particulate matter, and is charged at a constant rate at the time of painting, that is, during the operation of the painting booth, so that the chemical properties of the treated water can be used efficiently. In other words, it is desirable to supply according to the amount of paint used, but since it is a burden for the worker to perform replenishment work at all times, the actual situation is the start of a day's work or processing such as morning and afternoon together. Currently, the agent is often supplied and the proper effect is not obtained.

As mentioned above, this type of drug is effective in a small amount compared to liquid and easy to handle, so it is powdery or granular, but in a device that stably supplies granular material over a long period of time There is a situation that cannot be applied when the supply amount per unit time is small.

In powder transportation, a quantitative supply device has been proposed, but many are conveying means using air, and there is no suitable device simply for dropping into a water tank. In the case where the present invention is to be applied, if the daily supply amount is 1 kg, it is about 100 g per hour, only about 2 grams per minute, and cannot be applied by continuous supply, and is intermittently supplied. In some cases, there is a situation where the supply stability per one time cannot be obtained by the pump system.

It is necessary to improve daily productivity by reducing the burden on the worker and increasing the economic effect of effective use of the treatment agent, and there is a need for a device that can be easily used with a simple device and can obtain the effect. Is potentially.
In particular, the use of water-based paints is increasing due to environmental problems caused by volatile organic solvents. When treated water is used for washing showers or water curtains are formed and circulated, bubbles are generated due to air entrainment. However, it is difficult to circulate the treated water, and it is easy to cause adverse effects such as a decrease in collection performance and air bubbles scattering around. The need is growing because of the need.

The present invention reduces the burden on workers who mix powdered chemicals into the treated water of the painting booth that circulates and uses treated water, automatically supplies the appropriate chemicals according to the operation to the painting booth, The challenge is to maximize the effects of input.

The chemical supply can operate in conjunction with the paint booth operating the paint booth, and can be installed as a device that can be used safely and stably from the risk of fire and explosion caused by paints and solvents. Is to provide things.

In order to solve the above-mentioned problems, the present invention uses treated water to collect paint mist, and accommodates the powdered drug as a device for supplying the powdered drug to a painting booth that circulates the treated water. A hopper, a drive unit provided with a movable part below the hopper and the sieve part changing, and a fixed amount holding chamber provided with an open / close lid at the lower part, and a drive device for periodically operating the movable part; An opening / closing control device for periodically operating the opening / closing lid is provided, and is configured so that the opening / closing is performed at the upper part of the circulating water flow in the painting booth.

The driving device and the opening / closing control device are driven by an air cylinder, and are repeatedly driven by supply / exhaust of preset working air. The drive is configured to drive in conjunction with the operation of the painting booth.

Further, the hopper is provided with means for applying vibration periodically or continuously, and the means is integrally configured to be driven by the operating force of the driving device or the opening / closing control device.

According to the above configuration, if a powdered agent such as a flocculant or an antifoaming agent that needs to be supplied regularly is put into the hopper when the painting booth is used, the supply from the hopper is transferred to the quantitative holding chamber. After being sequentially supplied, it is poured into the circulating water flow of the painting booth at regular intervals, so frequent replenishment work is automatically supplied in an accurate amount, depending on the operating time of the painting booth used by the painting work In addition, the concentration of the drug can be stably maintained, and the effect can be obtained appropriately and effectively.

Therefore, it is possible to avoid wasteful consumption of chemicals, reduce the burden of the operator to stop the original painting work, or arrange other workers for replenishment work, and improve the productivity as a painting work. it can. Moreover, in addition to stabilization by the quantitative holding chamber, the blocking phenomenon in which the powder in the hopper forms a lump is also prevented and stabilized by configuring it to continuously vibrate with the device used for supply driving. Enable replenishment. These devices can be used safely because air is used for operation as a means for supplying the devices in an atmosphere of a volatile solvent.

In order to explain the present invention in detail, FIGS. 1 to 3 show an example of the configuration as an embodiment installed in a washing-type paint booth. The painting booth sucks and collects the paint mist that does not adhere to the object to be painted when sprayed and collects it again and re-applies to the object to be painted, and the surrounding work environment deteriorates. It is installed and used for the main purpose of preventing exhaust of harmful substances to the outside.

Although the structure of the painting booth is classified into several types according to the means for collecting the paint mist, a water-washing type apparatus is often used because of its good collection efficiency. Most of these have a structure in which treated water used for collection is circulated and used, and the cross-sectional structure shown in FIG. 1 is an example. Since these are shown in detail in many cases and literatures, the outline will be explained. One (front) is opened, the processing chamber 1 is arranged at the rear, and treated water is stored in the lower part and supplied to the processing chamber, etc. Then, a water tank 2 for recovery again is provided.

In the example of FIG. 1, a flush shower nozzle 3 is arranged in the treatment chamber, and treated water is caused to flow from the trough 4 stored in the upper part to the front water flow plate 5 to form a water flow film 10. It is configured to drop into the intake water tank. While the treated water is fed from the suction port 6 of the pump (not shown) to the nozzle 3 and the tub 4, a part of the shower water flows into the front water tank 7 and is returned to the water tank 2 through the water flow bed 8. It has a structure.

The supply device 11 for inputting medicine according to the present invention is installed so as to be dropped into a water tank 2 located at the rear of the processing chamber 1. Details of the apparatus are shown in FIG. 2 as a whole, a part of the apparatus is enlarged, and a hopper 12 is arranged at the upper part as shown in FIG. 3, and a sieve 13 is connected to the lower part. When the sieve 13 is made of a suitable mesh or perforated plate on the bottom, the movable net 15 is overlapped, and the movable net can be moved from the outside. In this example, the sieve 13 is known as a general household powder sieve, and the lever 16 is pulled. The movable net rotates, and when it is released, it uses a structure such as a spring to return and rotate in the opposite direction. The movable method is not limited to this, and it may be reciprocated. A structure in which the opening of the movable net 15 is displaced with respect to the opening of the fixed net 14 due to the movement and a part or all of the opening and closing is repeated. If it is good.

The size and number of meshes are selected according to the granular material to be used, but it is necessary to consider not only the particle size but also fluidity. In general, it is sufficient that the powder particles are not dropped just by dropping them into the overlapped nets, but only if they pass through when the movable nets are vibrated or moved. A fixed amount holding chamber 17 is formed below these nets, and dropping is temporarily restricted by an opening / closing lid 18.

The movable net 15 is driven by connecting the drive rod 19 so that the lever 16 is operated by the first air cylinder 20, and the open / close lid 18 connects the drive rod 22 of the second air cylinder 21 to the link 23. The position opened by the reciprocating motion is configured to open and close as indicated by the dotted line A. These air cylinders are controlled so that the operation is continuously repeated while being set automatically and at predetermined intervals by operating air supplied from another control device (not shown).

The granular material that drops when the opening / closing lid 18 is opened is installed at a position where it is supplied from the flexible duct 25 into the water tank of the painting booth through the receiving port 24. It is desirable that the duct should be considered so as to prevent scattering when falling on the water surface and not to get wet due to undulations or bounces on the water surface.

In addition to this, in order to prevent powder particles from adhering to the inside of the duct 25 due to moisture or wetting caused by naturally occurring vapor and becoming unstable, the purge air is periodically supplied into the duct. You can also take
These devices are installed in the water tank section of the above-mentioned painting booth, but are preferably installed in a place where there is a flow of water. In the case of the present embodiment, it is attached to the rear part of the water tank 2 and is not clearly shown in the figure, but a water flow flowing into the suction port 6 of the pump is formed, and after being introduced, it melts into the suction port and is sucked into the pump. It is installed in the edge part on the other side away from the suction inlet so that it may be supplied to each part.

When the powdered medicine is put in advance in the hopper of the apparatus installed with the above-described configuration and the coating booth is operated, driving is started by operating air from the control device in synchronism with this. The use of chemicals is usually determined by the amount of paint used, and it is desirable to supply it in an average order in accordance with the paint taken into the treated water. Therefore, when the coating chamber is operated at the start of spray coating, the supply device starts operating.

The first cylinder starts reciprocation at regular intervals to operate the lever of the sieve. In the case of Examples, it is a condition that 0.2 gram on average falls to the lower quantitative holding chamber in one reciprocation from the properties of the granular material, the mesh passing through the sieve and the area, etc. About 10 grams will enter. However, quantitative reliability is not sufficient because it varies depending on the storage state, remaining amount, environmental conditions, and the like of the granular material. According to the above configuration of the present invention, if the capacity of the quantitative holding chamber is 10 grams, it is held at a constant amount when it is filled by about 50 operations and does not change regardless of the operation of the first cylinder. .

In this state, when the second cylinder is operated and the opening / closing lid is opened, the powder particles in the quantitative holding chamber fall and are supplied to the water tank through the duct. The powder particles in the hopper are double meshes. Blocked and restricted from further supply. Therefore, if the second cylinder is actuated once every 5 minutes, 120 grams of powder particles are actually supplied 12 times per hour.

Actually, the supply amount of this type of chemical is about 5% of the paint / solvent taken into the painting booth without being applied to the object to be coated. If it is taken into the painting booth, 1 kg of granules will be supplied on average during the day. Depending on the conditions, it can be freely determined by the capacity of the quantitative holding chamber and the opening / closing interval, and can be continuously replenished stably.

In this way, the first cylinder has a function of stably feeding into the fixed quantity holding chamber and continues to operate continuously, and the second cylinder has a function of supplying a fixed quantity to the treated water of the coating booth at regular intervals. Yes. The opening / closing lid can be supplied in a fixed quantity by setting a sufficient time to completely fill the fixed quantity holding chamber.

Further, in order to perform a stable drop from the sieve device, the side surface of the sieve device is configured to hit a heel 26 made of an elastic material such as rubber or urethane. In the implemented example, by providing the flange 26 at the tip of the first cylinder, it is possible to apply a shock simultaneously with the operation of the sieve device and to surely drop it by causing vibration.

Although the present invention has been proposed as an optimal apparatus for supplying powdered chemicals in a painting booth, it can be easily used when it is necessary as an apparatus for supplying small amounts of granular materials.

It is explanatory sectional drawing of the coating booth which attached the supply apparatus of this invention. It is explanatory drawing which shows the whole structure of the supply apparatus of this invention. It is sectional drawing to which a part of FIG. 2 was expanded.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, Processing chamber 2, Water tank 3, Shower nozzle 5, Water flow plate 6, Suction port 11, Loading device 12, Hopper 13, Sieve 14, Fixed net 17, Fixed holding chamber 18, Opening / closing lid 20, First air cylinder 21 , Second air cylinder 25, duct 26, rod

Claims (5)

In an apparatus for continuously and quantitatively supplying a granular drug in a container, a hopper for storing a granular drug, a sieve part in which a moving part is provided below the hopper to change a sieve, Quantitative stabilization of particulate matter by providing a fixed quantity holding chamber with an open / close lid at the bottom, a drive device that continuously operates the movable part, and an open / close control device that periodically operates the open / close lid Feeding device.
The fixed and stable supply of the granular material according to claim 1, wherein the sieve part is formed by overlapping a fixed net and a movable net having a large number of apertures, and the apertures coincide with each other or are blocked by the movement of the movable net. apparatus.
2. The quantitative and stable supply of particulate matter according to claim 1, wherein treated water is used for collecting paint mist, and the opening / closing lid is positioned above the circulating water flow of a painting booth for circulating the treated water. apparatus.
The drive device and the open / close control device are driven by an air cylinder and repeatedly driven by preset supply / exhaust of working air, and the drive is interlocked with the operation of the painting booth. Fixed quantity stable supply device.
2. The apparatus for quantitatively and stably supplying a granular material according to claim 1, wherein the hopper is provided with means for applying vibration periodically or continuously, and the means is driven by an operating source of the driving device or the opening / closing control device.

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