JP2002346486A - Pellet abrasive washing equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pellet abrasive washing equipment at a low cost whose washing efficiency is high, drying efficiency is excellent and which is easy to operate. SOLUTION: This invention adopts the following means about a pellet abrasive washing equipment which has an agitation means making use of a foaming action by a drying blower, so that it can produce each action effect. Firstly, shortening of the drying time and improvement of the drying efficiency are realized through preventing the fugitive emission of a hot air for pellet drying supplied from below, and through pressure rise in the washing tank, by placing a washing tank lid 7 on a washing tank 3. Secondly, a drying efficiency improvement is realized through a prevention of hot air's leaking out of a bucket, by spreading a packing 4 in the bottom part 3a of the washing tank 3. Thirdly, the drying efficiency is improved by providing a throttole valve 141 at the lower part of a pre-washing room 9 in order to make it possible to exhaust the dripping water from the pellets during drying time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pellet abrasive cleaning apparatus for cleaning a pellet abrasive for polishing, for example, pachinko balls.

[0002]

2. Description of the Related Art A rice-grain-sized resin pellet is used as an abrasive for polishing a pachinko ball or the like by interaction with a pachinko ball when put into a polishing machine. It has been washed and reused. There are various types of pellet abrasive cleaning machines used for cleaning such polishing pellets (for example, JP-A-6-269560).

As a first example of the prior art, the structure of a commonly used pellet polishing machine will be described with reference to FIG. In this washing machine, a washing bucket 175 is housed in a washing tank 173 provided in a frame main body 171 so as to be freely taken in and out, a pellet to be washed and a detergent are put in the bucket, and a supply of washing water is received from below. The stirring is performed by rotating the stirring plate 177. The cleaning tank 173 includes a cleaning chamber 173b defined above the bottom 173a, and a cleaning preliminary chamber 1 defined below the bottom.
73c, and both chambers can communicate with each other by a water supply / drainage hole 173d provided in the center of the bottom. The stirring plate 177 is rotatable about a hinge 172 by a drive unit 179 provided so as to be swingable. The drive unit 179 includes a drive motor 181 and a transmission mechanism 1.
83, and a center shaft 185 is slidably provided at the center of a driven pulley 183a constituting the transmission mechanism. The stirring plate 177 is fixed to the tip of the center shaft 185.

[0004] Further, this washing machine is provided with a blower 187 and a heater 189, and a blower pipe 191 connected to an outlet of the heater is connected to a washing pre-chamber 173c provided at a lower portion of the washing tank. . This cleaning room 173c
In addition, a T-shaped joint 197 to which the ends of the water supply pipe 193 and the drain pipe 195 are connected is connected. The cleaning water and the rinsing water pass through the water supply / drain hole 173d from the cleaning pre-chamber 173c by opening and closing the water supply valve 193a, and the cleaning chamber 173 is rinsed.
b. And each drainage is a drain valve 195a
With the opening and closing of, water is drained from a drain pipe 195 through a water supply / drain hole 173d and a cleaning preliminary chamber 173c. On the other hand, the hot air for drying supplied from the blower pipe 191 enters the bucket through the pre-cleaning chamber 173c and the water supply / drain hole 173d, and through a number of through holes provided in the bottom 175a of the bucket. Washed (rinsed) wet pellets are deposited in the bucket after the rinsing step, but the warm air rises while heating the pellets through the gaps created between these pellets, and the pellet accumulation surface It is designed to be dissipated upward from.

[0005] Various improvements have been proposed for the pellet washer having the above-described structure, and the following two examples can be given particularly for improving the drying efficiency. Part 1
There is a method in which the drying step is shortened (second example). This is the stage of moving to the drying step after the rinsing step, while holding the pellet abrasive in a stationary state and dripping the moisture that wets the pellet, and adding a preheating step in parallel with this, to reduce the moisture The drying process is started in this state (Japanese Patent Application Laid-Open No. 60-158880). As a second example, there is a proposal of a pellet washer that employs means for shortening the drying step (third example). This adopts a U-shaped pipe as a drain pipe, and sends drying air into the washing tank along the same path as the drain pipe in a state where water is accumulated in the U-shaped pipe (Japanese Patent No. 2549218). issue). This is to prevent drying air from escaping from the drainage pipe to the outside of the equipment by blocking it with water accumulated in the U-shaped pipe to prevent the air from escaping and improve drying efficiency. is there.

[0006]

Each of the above-mentioned prior arts has its own problems, but only the problem of the drying efficiency will be described. First, in the first example, first, the cleaning tank 173
Since the hot air (heat) supplied from below the upper surface of the cleaning tank is opened, the hot air (heat) penetrates between the pellets and dissipates, resulting in extremely low thermal efficiency. Second, in order for hot air to pass between wet pellets, it is necessary to overcome excessive resistance, but the passage of hot air is easy to dry, so the hot air passage is located around And further away may result in delayed drying. Third, the hot air that has entered the cleaning tank leaks out of the bucket from the contact portion between the bottom 173a of the cleaning tank and the bottom of the bucket 175 and escapes, causing a decrease in drying efficiency. Fourthly, during the drying step, since water dripping from the pellets cannot be discharged, the water supply pipe 193 is not provided.
In addition, there is a problem that moisture remaining in the drain pipe 195 evaporates to remove heat of vaporization, and steam is sent into the washing tank by hot air to lower the drying efficiency of pellets.

In the second example, the occurrence of uneven drying which is a problem in the above basic structure can be suppressed. However, performing the preliminary drying after the rinsing step itself increases the drying time. . In the third example, water accumulated in the U-shaped pipe can remain in the U-shaped pipe if the air pressure for hot air is low, as in the conventional washing machine.
If the air pressure is increased in order to increase the drying efficiency, there is a problem that this water is pushed out from the U-shaped pipe and becomes meaningless. In addition, when hot air acts on the retained water in the U-shaped pipe and heats it, this water evaporates to take away heat of vaporization, and steam is sent into the washing tank by the warm air to dry pellets efficiently. There is a problem that is lowering.

An object of the present invention is to provide an inexpensive polishing pellet cleaning apparatus in which the time of a drying step is reduced and the drying efficiency is improved by supplying high-pressure hot air.

[0009]

Means for Solving the Problems In order to achieve the above object, a pellet abrasive cleaning apparatus according to the present invention has a configuration in which a conventional cleaning mechanism is fundamentally changed, and by adopting these configurations. The following operational effects are obtained. The basic configuration of the present invention includes a frame main body, a washing tank, a washing bucket, a piping device, and a washing tank lid. In this pellet abrasive cleaning apparatus, the stirring of the pellets in the cleaning step and the rinsing step and the rotation of the blower for supplying hot air in the drying step after the rinsing step are performed by the same motor. The following functions and effects can be obtained by adopting each of the means.

(Characteristics of the invention described in claim 1) In the above-described basic structure of the pellet abrasive cleaning apparatus of the invention described in claim 1, the cleaning tank lid is detachably attached to the upper end of the cleaning layer. Yes, in the state of covering this cleaning layer,
It comprises a peripheral portion surrounding the upper end and a top plate portion formed in an inverted conical shape.

(Operation and Effect of the Invention According to Claim 1) Since the above-mentioned blower / dryer can arbitrarily supply air for bubbling or hot air for drying into the cleaning tank from below the cleaning tank, the same effect can be obtained. The apparatus has two functions of stirring for washing the pellets and drying the pellets after washing. That is, in the first method, pellets and water are transferred from the pellets to be washed put in the washing bucket together with the washing water by using air for foaming supplied from the lower part of the washing tank to the washing tank by a blow dryer. Function to perform washing and rinsing by stirring. The second is a function of drying the pellets by supplying warm air from below the washing tank to between the washed pellets after the washing water is drained. In particular, the present invention adopts a configuration in which the cleaning tank is covered with the cleaning tank lid, so that the pellets to be cleaned placed in the cleaning bucket are supplied together with the cleaning water to the foaming tank supplied into the cleaning tank from below the cleaning tank. It has the function of increasing the cleaning efficiency when stirring using air. In the drying step, the first means is used as a means for improving the drying efficiency.
In addition, by blocking the warm air supplied from the blower / dryer by the lid of the washing tank, it is possible to restrict upward radiation. Secondly, since the hot air is less likely to leak from the washing tank, the pressure in the washing tank is increased, thereby increasing the pressure in the washing tank, thereby facilitating entry of the warm air between the pellets.

(Features of the Invention According to Claim 2) The invention described in claim 2 is an airtight seal between the bottom of the cleaning tank and the inside of the peripheral part, between the lower part of the cleaning tank and the bucket housed in the cleaning tank. It is characterized in that a packing of a predetermined width for holding the pressure is provided. The packing serves to prevent washing water and rinsing water from escaping from the periphery of the bottom of the bucket to the outside, and also to prevent hot air for drying from escaping to the outside. As a result, the warm air supplied from the blow drying device to the conical space defined by the upper surface of the bottom of the washing tank and the lower surface of the bottom of the bucket leaks from between the bottom of the washing tank and the periphery of the bottom of the bucket. Is eliminated, so that the drying efficiency can be increased.

(Characteristics of the invention described in claim 3) The invention described in claim 3 is characterized in that a drop valve is provided in the above-mentioned piping device to remove dripping water from the washed (rinsed) pellets in the drying step. The feature is that the drying efficiency is improved by enabling discharge. After the rinsing step, a large amount of water is contained between the pellets in the cleaning tank, but the water drops and stays in the cleaning room or the like, and the remaining water evaporates during the drying step. The vaporization heat is taken from the drying heat, and this vapor again enters between the pellets, and is converted into water droplets by contact with the pellets, which is one of the causes of lowering the drying efficiency. According to the present invention, the above-described throttle valve is provided below the pre-cleaning chamber so that water dropped from the pre-cleaning chamber can be collected and discharged to a drain pipe via the throttle valve. That is, the inlet of the throttle valve is connected to a vertical thin tube vertically provided at the lower part of the pre-cleaning chamber, and the water retained in the vertical thin tube increases the pressure of the pre-cleaning chamber due to the supply of hot air. To push out from the throttle valve to the drain pipe side.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (Entire Structure of Cleaning Apparatus) First, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view showing the pellet washing apparatus according to the present invention in a partially cutaway cross section, FIG. 2 is a right side view thereof, and FIG. 3 is a left side view thereof. As shown in FIGS. 1 to 3, most of the cleaning device is housed in a frame main body 1 indicated by a two-dot chain line, and the frame main body is movable by traveling means 1a, 1a. As shown in FIG. 1, a cleaning tank 3 is fixedly installed on the frame main body 1, and a cleaning bucket 5 which can be stored in the cleaning tank so as to be freely taken in and out of the cleaning tank is shown above the cleaning tank. Furthermore, cleaning tank 3
It is shown that the washing tank lid 7 can be put on the upper part of the table.

In the center of the bottom 3a of the washing tank 3, a water supply / drain hole 3 is provided.
A cleaning room 9 is provided on the lower surface side of the bottom in a range surrounding the water supply / drainage hole. A connection port 9a for connection with a piping device 11 provided below the cleaning tank is provided in a lower portion of the pre-cleaning chamber 9. Further, near one end of the cleaning preliminary chamber 9, the vicinity of the tip of a blower tube 15 that connects the blower / dryer 13 and the cleaning tank 3 is fixed. A ring-shaped packing 4 is laid on the upper surface around the bottom 3a of the washing tank, so that when the bucket 5 is stored, airtightness between the inside and outside of the bottom surface of the bucket can be maintained (see FIGS. 5, 6, and 7). . At the lowermost part of the side wall of the washing tank 3, there is provided a discharge hole 3 c for discharging water collected between the washing tank and the outside of the bucket, and the tip of the discharge hole is connected to the piping device 11. The discharge hose 16 is connected (see FIG. 3).

A water level sensor 17 is provided at one side (right side in FIG. 1) of the cleaning tank 3 for detecting whether or not the cleaning water supplied into the cleaning tank has reached a specified water level. The water level sensor 17 employs a continuity sensor that is connected to a circuit when the washing water that has risen up the water level tube 18 reaches a reference water level. An overflow port 3d for rinsing water is provided at a position closer to the upper side of the other side of the washing tank 3, and an overflow pipe 19 is connected to this overflow port. The overflow pipe 19 is connected to the piping device 11 located below. Cleaning tank 3
A plurality of ventilation holes 3 for discharging foam generated in the cleaning tank in a cleaning step described later are provided near the upper end portion of the surrounding area.
e, ... are juxtaposed. Further, on the outer periphery of the upper portion of the cleaning tank 3, there is provided an exhaust air cleaning gutter 21 which constitutes a later-described foam processing means 20 for crushing the foam discharged from the ventilation port 3e and removing dirt components. During the cleaning process, auxiliary cleaning water flows through the cleaning gutter 21, and the foam discharged from the ventilation port 3e is purified by passing through the water.

An auxiliary water discharge port 21a for discharging the auxiliary cleaning water is provided at a predetermined position (left side in the drawing) of the outer periphery of the cleaning gutter 21, and an auxiliary water discharge pipe 25 is connected to the auxiliary water discharge port 21a. The distal end (lower end) of the auxiliary water discharge pipe 25 is capable of discharging the discharged cleaning auxiliary water to the filtration device 27.
The filtering device 27 is filled with a filtering material 27a, and the dirt component floating in the auxiliary water passing through the filtering device can be removed by the filtering material. The bottom of the exhaust air cleaning gutter 21 on the other side (the right side in FIG. 1) of the cleaning tank 3 includes:
A water supply / drainage hose 29 for cleaning auxiliary water is connected. The water supply / drain hose 29 is connected to the water supply branch pipe 121 of the piping device 11, and the supply and discharge of the cleaning auxiliary water to and from the cleaning gutter 21 can be regulated by the piping device.

(Structure of Washing Bucket) Next, the washing bucket will be described. As shown in FIGS. 1 and 4, the washing bucket 5 is provided with a bracket 52 on an upper part of a main body 51 having a cylindrical shape.
And a string-like handle 53 is provided through the intermediary. The bottom part 54 of the bucket is formed in a conical shape with the center part raised, and a large number of through holes 54a,. Also, a number of similar through-holes 51a,... Are provided in the vicinity of the upper end of the main body 51 of the bucket in a strip shape having a predetermined width. The diameters of the through holes 51a and 54a are such that the washing water can pass through and the pellets to be washed cannot pass through. Incidentally, when the diameter of the pellet is 2.5 mm, the diameter of the through hole is 1.
6 mm.

(Structure of cleaning tank lid) As shown in FIGS.
The cleaning tank lid 7 includes a peripheral part 71 having an inner peripheral surface fitted into the cleaning tank 3 with a slight gap at the upper part of the outer periphery, an inverted conical top plate part 72, and a handle 73. As will be described later, the washing tank lid 71 prevents the release of heat for drying and constitutes a foam processing means described later. As shown in FIG. 6, when the cleaning tank lid 7 is covered on the cleaning tank 3, a gap c is formed between the ventilation hole 3e in the upper part of the cleaning tank and the inner peripheral surface of the peripheral portion 71. The air (foam) sent to spread out along the lower slope of the plate portion 72 can be discharged to the discharge air cleaning gutter 21 through the ventilation holes 3e. As will be described later, the foam containing the dirt component is washed by the cleaning gutter 21.
Purification is possible by passing through the auxiliary cleaning water flowing inside. Further, since the washing tank lid 7 is placed on the upper end of the washing tank 3, in the drying step described later,
It prevents the hot air from escaping upward, and also facilitates the entry of the hot air into the pellets due to an increase in the pressure in the cleaning tank.

(Configuration of Piping Apparatus) The piping apparatus 11 is shown in FIG.
As shown in FIG. 6, the pipe, the joint, and the valve are organically connected to each other to control the supply and drainage. First, a main water supply pipe 113 connected to a main water supply port 111 provided on the right side of the frame main body 1 is disposed horizontally in the frame toward the lower part of the center of the washing tank 3. This main water pipe 1
Reference numeral 13 is connected to the left side of the cross joint 115 connected to the connection port 9a of the pre-cleaning chamber 9. The main water supply pipe 113 has a main water supply valve 1 for regulating the supply of cleaning water into the cleaning tank 3.
17 are provided. Immediately upstream of the main water supply valve 117,
A water supply branch pipe 121 is connected through a first T-shaped pipe joint 119, and the water supply branch pipe 121 is connected to the water supply adjustment valve 123 and the second water supply branch valve 121.
Water supply valve 125, second T-shaped fitting 127 and first drain valve 1
29 are sequentially arranged. A water supply / drainage hose 29 connected to the exhaust air cleaning gutter 21 described above is connected to the second T-shaped joint 127. The drain branch pipe 131 is connected downstream of the second drain valve 129. A third drainage pipe 133 is connected to the other connection port of the cross joint 115, and the tip is connected to the irregular cross joint 135. The third drainage pipe 133 is provided with a main drainage valve 137, which can cooperate with the main water supply valve 117 to regulate supply and drainage of washing water and the like in the washing tank 3.

A vertical thin tube 139 is connected to the downward connection port of the cross joint 115, and a throttle valve 141 for appropriately discharging water accumulated in the cross joint to the main drain pipe 145 at a lower end thereof. Is provided. A branch drain pipe 143 is connected to the outlet side connection port of the throttle valve 141, and the tip of the branch drain pipe is connected to a third T-shaped pipe joint 147 provided at one end of the main drain pipe 145. Further, a fourth T-shaped pipe joint 149 is provided in the branch drain pipe 143, and a third drain valve 151 is provided downstream thereof. Above irregular cross joint 1
The above-mentioned third drain pipe 133 is connected to the right connection part of 35, and the discharge pipe 27b of the above-mentioned filtration device 27 is connected to the left deep connection port. Also irregular cross joint 1
The lower end of the overflow pipe 19 whose upper end is connected to the overflow port 3d is connected to the upward connection port 35. Further, a downward connection port of the irregular cross joint 135 is connected to the third T-joint 147 provided in the main drain pipe 145 described above. The fifth T-joint 153 provided on the downstream side of the third T-joint 147 has the drainage branch pipe 1 described above.
31 are connected. Overflow pipe 1 with the above configuration
9. Filtration device 27, drain branch pipe 131 and branch drain pipe 1
The drainage from the drain 43 can always be performed irrespective of the opening and closing of the main drainage valve 137.

(Structure of throttle valve) The throttle valve 141 described above is
As shown in FIG. 7, a valve chamber 141b communicating with a vertical thin tube 139 is provided vertically in a T-shaped tubular valve box 141a,
The left side of the valve box is a connection port 141c with the branch drain 143. Between the connection port 141c and the valve chamber 141b is a throat portion 141d which is narrowed down in the middle to increase the resistance of the fluid passing therethrough. A needle valve rod 141e is provided on the right half of the valve box 141a so as to be able to advance and retreat, and the conical tip is engaged with the narrowed portion of the throat portion 141d to allow passage of fluid. It can be stopped. This needle valve stem 14
Since 1e employs a screw pair, it can move forward and backward by rotation.
It is possible to adjust the flow rate of the drainage to the drain 43. This throttle valve 141 is connected to the vertical thin tube 1 via a cross joint 115.
The water that has fallen from 39 and has reached the valve chamber 141b of the throttle valve 141 can be discharged through the throat portion 141d if the third drain valve 151 is open. Trace amount. However, the pressure of the washing pre-chamber 9 from continuing supply of warm air into the cleaning tank 3 is 4~5kPa than
When it is at the top , the water remaining in the cross joint 115 (vertical thin tube 139) can be discharged by being pushed out from the throat portion 141d to the branch drainage pipe 143 side. In this way, the pressure of 4 to 5 kPa or more is working in the valve chamber 141b after all the retained water is drained,
Since the diameter of the throat portion 141d is extremely small and the flow rate is adjusted by the needle valve 141e, the amount of hot air passing at this time is very small. The relationship between the pressure of the hot air in the washing tank capable of draining the retained water and the amount of hot air passing after draining the retained water is determined by adjusting the needle valve 141e.

As shown in FIGS. 2 and 8, the blow drying device 13 is provided on the upper side of the frame body 1 and obliquely above the washing tank 3, and includes a blower 31, a motor 31a, and a heater. 33 and the blower tube 15. As described above, the blast drying device 13 includes the cleaning tank 3.
Send air into the inside to cause foaming action in the wash water,
There are two functions, a stirring function for stirring by forced circulation and a drying function for sending hot air into the pellets accumulated in the washing tank 3 after washing using the blower 31 and the heater 33 and drying. Have. For this reason, the motor 31a is capable of switching the number of rotations, and the heater 33 is controlled so as not to operate at the time of forced circulation of the mixed fluid, but to operate only at the time of drying. The front end of the blower tube 15 faces upward in the pre-cleaning chamber 9, and the end of the jet port 15b at the front end is made substantially flush with the bottom 3a of the cleaning tank. The diameter of the tip of the blower tube 15 is
The nozzle is narrowed down to have the function of a nozzle. As a result, air can be rapidly discharged (spouted) from the center of the water supply / drain port 3b provided in the cleaning tank into the cleaning tank. It is possible to cause forced circulation of the mixed fluid. In the lower part near the front end of the blower tube 15, water that has flowed back from the jet port 15b after the rinsing step has been completed is placed in the pre-cleaning chamber 9.
There is a discharge hole (not shown) for discharging the water to the hopper. As described above, the blower / dryer 13 is installed at the upper portion on the front right side of the frame body 1, but as shown in FIG. 2, the blower 31 and the blower motor 31a are located on the rear side (right side in the drawing).
And a control panel 35 is provided on the front side. The control panel 35 is provided with a control circuit for controlling the piping device 11 and the air-drying device 13 and various switches and display lamps.

(Structure of Foam Treatment Means) As shown in FIG. 6, the foam treatment means 20 covers the washing tank 3 with the washing tank lid 7, and the cleaning auxiliary water flows through the exhaust air washing gutter 21. It is a temporary construct that holds. That is, in the state where the washing tank 3 is covered with the washing tank lid 7,
Ventilation opening 3e, top 72 of cleaning tank lid, exhaust air cleaning gutter 2
1 and a foam passage 22 which is formed by interposing a peripheral portion 72 of the washing tank lid therein. Since the foam passage 22 disappears when the washing tank lid 7 is removed, the foam processing means 20 is not established in the open state. The foam passage 22 is divided by a peripheral portion 71 of the cleaning tank lid into auxiliary cleaning water supplied to the cleaning gutter 21 from the upper surface to a predetermined depth at a peripheral portion, and includes a gap formed on both sides of and below the peripheral portion. The foam is crushed by water pressure as the foam passes through the auxiliary water filling the passage.

(Cleaning Method and Operation) First, the bucket 5 is housed in the cleaning tank 3, a pellet to be cleaned and a predetermined amount of detergent are put into the bucket up to a reference line (not shown), and the cleaning tank lid 7 is covered. (See FIGS. 1, 5, and 6). The charging of the pellets to be cleaned in the bucket 5 may be performed before or after the bucket is stored in the cleaning tank. At this time, the main water supply valve 117 and the second water supply valve 12
5. The second drain valve 129, the third drain valve 151, and the main drain valve 137 are also closed. Here, when a start switch (see FIG. 2) attached to the control panel 35 is turned on, the main water supply valve 117 of the piping device 11 is opened, and the washing water introduced from the main water supply port 111 is washed through the main water supply pipe 113. Room 9
Water is supplied to This washing water further enters the washing tank 3 through the water supply / drain hole 3b of the washing tank 3, and enters the bucket through the through holes 54a,... (See FIGS. 1 and 4) provided at the conical bottom of the bucket 5. I do. At this time, the second water supply valve 125
The auxiliary cleaning water is supplied from the water supply / drain pipe 29 to the discharge air cleaning gutter 21. When the water level sensor 17 detects that the washing water whose water level is rising in the bucket 5 has reached the upper limit, the main water supply valve 117 is closed by the input of the detection signal. At this time, even if the washing water exceeds the specified water level, the water level sensor does not work, and if the water level in the bucket 5 rises abnormally, the washing water overflows from the overflow port 3d. The inside of the tank does not reach a predetermined water level.

Next, the switch of the blow-drying device 13 is turned on, and air is supplied from the blower 31 to the washing tank 3 through the blow-out tube 15 from the jet port 15b. It is desirable that the blowing pressure at this time corresponds to the water level (head) in the washing tank. For example, assuming that the height from the bottom 3a of the washing tank to the overflow port 3d is 500 mm, the air supplied by setting the blast pressure to a pressure higher than the pressure corresponding to the water head, that is, 5 to 5.5 kPa, and It is preferable to easily reach the upper surface of the mixed fluid obtained by mixing the washing water. As shown in FIG. 6, this air starts a bubbling action at the ejection port 15 b of the blower tube 15, that is, at the center of the lower end of the cleaning tank 3, and the bubbles rise while growing one after another and are provided at the bottom 54 of the bucket 5. Into the bucket through a number of through holes 54a. The behavior of this foam depends on the properties of the washing water.However, in the washing water mixed with a normal detergent, large bubbles are maintained even when it reaches the water surface because the surface tension is large. ing. When the air is further blown into the washing tank 3, a forced circulation action as shown by an arrow is generated in the bucket 5 as the bubbles rise. For this reason, the above-mentioned mixed fluid is stirred to perform a cleaning action on the pellets.

Bubbles grown in the process of stirring the mixed fluid consisting of pellets and washing water by convection are accumulated on the fluid surface as foam containing the dirt component after washing the pellets by forced circulation. These foams move to the outer peripheral portion along the inverted conical surface of the top plate portion 72 of the washing tank lid 7 as the pressure in the tank rises, and are discharged from any ventilation port 3e through the foam passage 22 to clean the discharged air. The water is discharged into the cleaning auxiliary water of the gutter 21. As described above, the cleaning gutter 21 is supplied with the cleaning auxiliary water during the cleaning process, and the foam discharged to the cleaning gutter 21 is used for foam formed in the cleaning gutter by the cap of the cleaning tank lid 7. It passes through the auxiliary water in the passage 22. At this time, these bubbles are crushed by the water pressure of the auxiliary water, the air inside is released to the atmosphere, and the water containing the remaining dirt components dissolves in the auxiliary water for cleaning. The crushed foam component flows into the cleaning gutter 21 while being mixed with the cleaning auxiliary water, and is discharged to the filtration device 27 through the auxiliary water discharge port 21a and the auxiliary water discharge pipe 25. The drainage filtered by the filtration device 27 is supplied to the irregular cross joint 135, the third
The water is discharged from the main drain pipe 145 via a T-shaped joint 147. It is desirable that the filtering material 27a be appropriately replaced so as to prevent a decrease in filtering performance.

After the elapse of a predetermined time, the cleaning operation is completed by stopping the blower 31. Then, the main drain valve 137 and the third drain valve 151 are opened, and the cleaning water remaining in the cleaning tank 3 is drained from the water supply / drain hole 3b through the cross joint 115, the irregular cross joint 135, and the third T-joint 147. Discharge from tube 145. Note that the washing water overflowing around the bucket 5 is discharged from the lower drain port 3c, the drain hose 16 and the main drain pipe 145 through the branch drain pipe 143. At this time, the second water supply valve 125 is closed, and the second drainage valve 129 is opened, so that the cleaning auxiliary water in the cleaning gutter 21 flows down from the water supply / drainage hose 29 and passes from the main drainage pipe 145 through the second T-shaped joint 127. Is discharged. Wash water flowing backward in the blower pipe 15 and remaining therein is discharged from a drain hole (not shown) into the washing pre-room 9,
The main drain pipe 1 through the third drain pipe 133 together with other washing water
It is discharged from 45. Further, the cleaning water flowing backward in the blower pipe 15 and remaining therein is drained from the drain hole into the cleaning room 9.
And is discharged from the main drain pipe 145 through the third drain pipe 133 and the branch drain pipe 143 together with other washing water.

Next, the main drain valve 137 and the third drain valve 151
Is closed, the main water supply valve 117 is opened, and rinse water is introduced into the cleaning tank 3 from the main water supply port 111 by the same operation as in the cleaning step. When the water level in the washing tank 3 reaches the specified water supply position, the blower 31 rotates to send air into the washing tank, and forcibly circulate the fluid obtained by mixing the rinse water and the pellets in the same manner as in the above-described washing step. A rinsing is thus performed. During this rinsing step, the foaming action by the supply and blowing of the rinsing water is continuously performed. The rinsing water overflowing from the through hole 51a in the peripheral wall of the bucket 5 due to the continuous supply of rinsing water is drained from the main drain pipe 145 through the overflow port 3d, the overflow pipe 19, the irregular cross joint 135 and the third T-joint 147. . In this rinsing step, bubbles and dirt separated from the pellets are successively sent upward by the supply of the rinse water from below, and the pellets are cleaned by discharging the dirty rinse water from the overflow port 3d through the overflow pipe 19. I do. This rinsing step ends when the set time has elapsed. Thereafter, drainage is performed by the same operation as drainage in the cleaning step.

When the drainage of the rinse water is completed, the main drain valve 137
Is closed, and the third drain valve 151 is closed. Subsequently, the drying device 13 is activated to operate the blower 31 and the heater 33.
The hot air generated by the above is supplied into the cleaning tank 3 through the blower pipe 15. As shown in FIG. 8, this warm air is blown upward into the washing tank from the outlet 15b of the blower tube, and is formed into a conical shape partitioned on the lower surface of the bottom 54 of the bucket 5 and the upper surface of the bottom 3a of the washing tank. Stay in the space. Then, as the pressure in the space increases due to the hot air supplied subsequently, a large number of through holes 54a provided in the bucket bottom 54 are formed.
(See FIG. 4) and between the pellets in the bucket. This warm air is applied to the bottom 3a of the washing tank and the periphery 5 of the bucket.
Since the packing 4 is interposed between the lower end of 1 and the packing 1,
It is possible to prevent hot air from escaping outside the bucket. The packing 4 functions to prevent the escape of hot air, improve the drying efficiency, and increase the hot air pressure in the space to facilitate the entry of warm air between the pellets.

This hot air passes between the pellets deposited in the bucket 5, passes through the space above the pellet deposition upper surface f, hits the lower surface of the top plate 72 of the cleaning tank lid 7, and follows the inverted conical surface Flow to the outer periphery. A part of the hot air is radiated into the air through a detour including a gap constituting the foam passage 22, while the remaining hot air changes its direction in the upper part of the outer periphery and moves downward from the vicinity. Most of the warm air that has descended from the top plate 72 moves along the upper surface f of the pellets to overheat the upper surface of the pellets, and circulates toward the center while warming the pellets from the surface. But,
As the pressure in the tank rises, a part of the warm air enters the pellets from the upper surface f of the pellets, and recirculates to the center along the inverted conical surface at the bottom of the bucket to perform a circulating motion.
This allows warm air to spread to every corner of the pellet-deposited layer, so that the drying time is short, and since the washing tank lid 7 is placed on the washing tank 3, heat radiation is prevented, so that the drying efficiency is high. I have.

Immediately after the completion of the rinsing step, the surfaces of the respective pellets are wet, and moisture remains between the particles of the pellets. These residual water drops downward after the drainage is completed. Further, at the beginning of the drying step, a large amount of water is still left between the pellets because sufficient drainage has not been performed, thereby hindering the passage of warm air. As the time elapses, the water drops from between the pellets and is discharged from the through hole in the bottom 54 of the bucket to the pre-cleaning chamber 9 through the water supply / drain hole 3b in the bottom 3a of the cleaning tank. The dripping water accumulates in the downward portion of the cross joint 115 from the pre-cleaning chamber 9, and the accumulated water evaporates by warm air in the drying step and passes between the pellets, which causes a reduction in drying efficiency. ing. Therefore, it is necessary to appropriately drain the retained water, but this drainage is performed using a throttle valve 141 connected below the cross joint 115. Some of the dropped water may enter the air duct through the outlet 15b of the air duct 15 and accumulate there. However, as described above, since the drain pipe 15 is provided with a drain hole, the accumulated water also flows from the drain hole to the cleaning room 9.
It is discharged inside. These accumulated waters flow down from the connection port 9a of the pre-cleaning chamber 9 to the cross joint 115, but in the drying step, since the main drain valve 137 is closed, the remaining water is connected to the lower part of the cross joint 115 and below. And stays in the vertical thin tube 139.

As described above, when the water retained in the cross joint 115 and the vertical thin tube 139 is heated by the above-described hot air, the water evaporates to take away heat of vaporization, and the steam enters the pellets by convection to form water droplets. Doing so causes a reduction in drying efficiency. Therefore, in order to prevent this, the second drain valve 151 of the branch drain pipe 143 is opened, and the above throttle valve 1 is opened.
By draining from the main drain 145 via 41,
The cause of the decrease in thermal efficiency can be removed. When the drying step is completed after a lapse of a predetermined time, the washing tank lid 7 is removed, the bucket 5 is taken out, the next bucket is put in the washing tank 3, the pellets to be washed and the detergent are put therein, and the same procedure is repeated. Perform the following cleaning work in the same manner as described above.

The pellet washing apparatus according to the present invention
The present invention is not limited to the above-described configuration, and various configurations can be adopted, and the present invention is not limited to changes in details. Also,
The operation of the various switches and valves in the above embodiment can be performed manually, but by automating as described above, it is only necessary to put the bucket in and out, put the pellets to be washed and the detergent, and turn on the start switch. It is also possible to perform a series of operations.

[0035]

According to the present invention, a single motor can be used for both washing (including rinsing) and drying, and the cleaning efficiency is improved by employing various means. Specifically, firstly, it is possible to prevent heat dissipation by employing the cleaning tank lid and to improve drying efficiency by increasing the hot air pressure in the cleaning tank. Second, it is possible to prevent hot air from leaking from the bottom of the bucket by installing a packing on the bottom of the cleaning layer. Third, the drying efficiency can be improved by draining the dripping water caused by the installation of the throttle valve.

[Brief description of the drawings]

FIG. 1 is a front view of a partially cut-away section showing the entire configuration.

FIG. 2 is a right side view.

FIG. 3 is a left side view.

4A and 4B show a washing bucket, wherein FIG. 4A is a plan view and FIG. 4B is a front view of a partially cut-away cross section.

FIG. 5 is a partially cutaway front view showing a state where the washing bucket is put in the washing tank.

FIG. 6 is an explanatory diagram showing an operation in a cleaning tank in a cleaning step.

FIG. 7 is an enlarged sectional view showing a configuration of a throttle valve.

FIG. 8 is an explanatory diagram showing an operation in a cleaning tank in a drying step.

FIG. 9 is an explanatory diagram showing a configuration of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Frame main body 3 Cleaning tank 3a Bottom part 3b Supply / drain hole 3d Overflow port 3e Ventilation port 5 Cleaning bucket 54 Bottom part 54a Through-hole 7 Cleaning tank lid 71 Peripheral part 72 Top plate part 9 Cleaning pre-room 11 Piping device 141 Throttle valve 13 Air blower / dryer Reference Signs List 20 foam treatment means 21 discharge air washing gutter 27 filtration device 31 blower 33 heater

Claims (3)

[Claims] 1. A frame body, a washing tank, a washing bucket,
It is a pellet abrasive cleaning device equipped with a piping device, an air drying device, and a cleaning tank lid. The cleaning tank is fixedly installed on the frame main body so that the cleaning bucket can be stored, and a water supply / drain hole is provided at the bottom and near the top. A plurality of ventilation holes juxtaposed around the periphery of the washing tank, wherein the washing bucket can be freely stored in and removed from the washing tank, and a plurality of through-holes are provided in a conical bottom. The piping device is provided for regulating water supply and drainage to the washing tank and the like, and the blast drying device arbitrarily supplies air for bubbling or hot air for drying into the washing tank from below the washing tank. The washing tank lid is detachable on the upper end of the washing layer, and is provided on a top plate portion formed in an inverted conical shape, and is vertically provided around the top plate portion and is attached to the washing layer. With the A peripheral portion surrounding the upper end of the cleaning layer, the pellets to be cleaned are put in the cleaning bucket stored in the cleaning tank, the cleaning tank lid is put on the cleaning tank, and the cleaning tank is covered by the piping device. It is possible to control the water supply and drainage, and to stir and dry the pellets to be cleaned by the blower / dryer. By covering the cleaning tank with the lid of the cleaning tank, foam generated in the cleaning step is treated. A pellet abrasive cleaning apparatus characterized by comprising a foam treatment means for preventing the hot air from diffusing upward in a drying step. 2. A packing according to claim 1, wherein a packing having a predetermined width for maintaining airtightness between the bottom of the washing tank and the inside of the bucket is provided at the bottom of the washing tank and inside the peripheral wall. Characteristic pellet abrasive cleaning equipment. 3. The pellet polishing method according to claim 1, wherein the piping device is provided with a throttle valve for discharging dripping water from the washed pellets in a drying step. Material cleaning equipment.