JP3162890U - Sand exchange system used for sandblasting machine - Google Patents

Abstract

A sand exchange system for use in a sandblasting machine is provided. A sand exchange tower 1 composed of an inner rod 11 and an outer rod 12, a sand wholesaler 2, a plurality of connecting plate sets 6, a support frame 5, and a water pipe set 3. The mixed spray of sand and water in the sandblasting machine is introduced into the sand exchange tower through the water pipe set, and due to intermittent transport and difference in specific gravity of sand water, the sand is placed in the sand exchange tower. It settles and enters the sand wholesaler, and demonstrates the effect of separating sand and water gradually. And the sand-water mixed spray liquid in the upper layer of the inner wall is introduced into the outer wall of the sand exchange tower by the overflow method, and further circulated to the stirring tank of the sandblasting machine, so that the concentration of the sand-water mixed spray liquid in the stirring bowl gradually decreases Thus, since the sand / water mixed spray liquid is continuously circulated in the sand blasting machine and the sand exchange tower, the sand / water mixed spray liquid is circulated into the stirring tub and further driven into the sand blasting machine tube in the sand blasting machine. [Selection] Figure 1

Description

The present invention uses the concept of the structure design of the sand exchange tower and the liquid level calculation of the sand exchange tower. The present invention relates to a sand exchange system that achieves the effect of entering sand and gradually separating sand and water.

During the manufacturing process of an industrial product, it is necessary to always generate a uniform and appropriate roughness surface on the processed product by sandblasting when many processes are performed, which contributes to the subsequent steps of the production line. For example, a wet process in the process of printed circuit boards (PCBs) in the electronics industry involves polishing the surface of the electrical circuit board uniformly after the surface of the electrical circuit board has been polished by a sandblasting machine. The impedance layer needs to be easily attached on the plate surface. Normally, the sand blasting liquid in the sand blasting machine is a sand / water mixing spray liquid in which gold and sand (for example, Al2O3) and water are mixed in a ratio of 1: 4. In order to avoid sedimentation of the sand-water mixed spray liquid, normally, the mixture is first stirred in a sand blasting machine and then driven into the sand blasting machine pipe of the sand blasting machine by a sand blasting pump, and the processed plate is passed through a nozzle. Spray the surface and exert the spray effect. The liquid level in the stirring vessel is controlled by using the liquid level gauge of the apparatus on the vessel. When the sandblasting machine starts up, in order to achieve a uniform stirring effect of the sand water mixed spray liquid, first, the stirring motor is started and stirring is performed by a preset time, and at this time, the tank is passed through the liquid level gauge. It is possible to detect whether the liquid level in the tank is at an appropriate level, and if the liquid level still does not reach the low water level, the tap water replenishing valve is automatically opened to replenish the stirrer. The liquid level is higher than the low water level, and the sandblast pump is activated and spraying is performed. However, the other water source of the stirrer originates from the water spray tube that cleans the sand remaining on the substrate surface in the sandblasting machine, and the washed sand water also flows into the stirrer, and therefore the liquid level of the stirrer At this time, the high water level of the liquid level gauge is reached, the sand water separation pump is started, the spray liquid is driven into the sand water separator, and the vortex and centrifugal principle is used to perform the basic separation of sand and water. The water is circulated to the stirrer, and the relatively light sand water is poured into the relay tank to be settled, or filtered by a filter and then precipitated or filtered. The substrate is further washed back to the washing step to wash the substrate, the sand and sand remain in the relay tank or the filter bag of the filter, and the concentration of the spray liquid gradually decreases, thereby affecting the spray effect. For this reason, it is necessary that the sandblasting operation always extracts a sample of the spray liquid from the agitator and inspects the concentration, and appropriately replenishes the gold sand.

The roughness of the surface of the sandblasting work is controlled by factors such as the average particle size and sharpness of the gold sand and sand, the concentration of the spray liquid, the transport speed of the processed substrate, and the spray pressure. Therefore, the gold sand is always worn and needs to be renewed after a while after use, and for different roughness plates, different numbers (with different average particle sizes) or different components It is necessary to replace the sand blasting machine. In the past, all sand exchanges were performed manually, first shut down to settle the sand in the stirrer, drain excess water in the stirrer, and then use a shovel. After squeezing out about 75kg and about 40 liters of gold and sand, scrub the inner wall of the machine base and the transport roller with washing water and add a stirrer bowl, The pump is opened, and the relatively low concentration sandblasting fluid again cleans the relevant parts via the sandblaster spray line, then shuts down and scoops out the remaining sand in the stirrer. Needs to be performed several times, and if a part such as a roller or shaft is disassembled and cleaned one by one, a more preferable cleaning effect can be achieved. However, such sand exchange and cleaning methods consume considerable water resources and demand about one day of work time. For example, in order to save operating time, when the machine base tries to achieve a suitable cleanliness in a single operation, the sandblast pump is opened and the spray liquid overflows in the agitator while adding wash water. It is discharged directly into pipes / grooves outside the factory, and gold sand is settled in the pipes / grooves. Over time, drain pipes / grooves are clogged, and drainage is poor during the rainy season. It is easy to invite water damage caused by.

Currently, only a very small number of sandblasting machines on the market declare that sand can be changed, and the work is to extract the spray liquid in the stirring tank into the added relay tank, precipitate it, and wash water. By replenishing, the concentration of the sandblasting liquid in the stirrer is lowered, the sandblasting machine is started again to wash the machine base, and if it is circulated a plurality of times in this way, the concentration is gradually reduced and the machine base is washed. Such a method requires at least one relay tank whose volume is larger than that of the stirring tank, and even if the sediment of the hard sand is not in time, it is discharged and leads to the loss of the hard sand and the contamination of the pipes and grooves. prevent.

From this, the conventional scheme described above still has a number of drawbacks, is not a really good design, and needs to be improved, but the inventor has found that each of the schemes produced by the conventional scheme described above In light of the shortcomings, I intended to improve and innovate, and after many years of hard work and independent research, I finally succeeded in researching the sand exchange system used in the sandblasting machine of the present invention. To be completed.

The purpose of the present invention is to provide a sand exchange tower, and by using the structural correspondence between the sand exchange tower and the machine base, the double effect of separation of sand water and washing of the machine base is achieved. .

Another object of the present invention is to provide a logical concept of the liquid level calculation of the sand exchange tower, which achieves quick separation of sand water and simple sand wholesale effect by intermittent transport and hourglass-like design. To do.

A sand exchanging system that achieves the object of the above-described device is composed of one inner gutter and an outer gutter having a tapered bottom, and a plurality of connection holes are provided in the bottom of the outer gutter so that the sand exchanging tower is Corresponding to a plurality of connecting plate sets, one sand exchange tower locked on one support frame, and a taper portion is formed on the top of the housing, and a plurality of taper portions are formed on the top surface of the taper portion. And a single sand wholesaler that is locked to the bottom of the sand exchange tower by a plurality of lock sets, and fixed to the surface of the sand exchange tower. Furthermore, a plurality of connection plate sets in which a plurality of fixing holes are installed at the bottom of the connection plate set, and a sand exchange tower corresponding to the plurality of connection plate sets by installing a plurality of connection holes in the top surface thereof. One support frame that locks onto the support frame;
Each of which includes a water pipe set laid on the inner and outer walls of the sand exchange tower, and the present invention connects one sandblasting machine with the above-described structure, and the gold and sand in the stirring bowl of the sandblasting machine. The water-sand mixed spray liquid is introduced into the sand exchange tower via the water pipe set, and due to intermittent water flow and difference in specific gravity of sand water, the Kongo sand settles on the inner side of the sand exchange tower, and the upper layer of the inner side The sand / water mixture spray liquid is introduced into the outer shell of the sand exchange tower by the overflow method, and further circulated to the sand blasting machine's stirrer, reducing the sand concentration of the sand / water mixture spray liquid in the stirrer and Since the spray liquid constantly circulates in the sand blasting machine and the sand exchange tower, the concentration of the sand water mixed spray liquid circulating in the stirring blast of the sand blasting machine gradually decreases.

1. The present invention uses the original pump of the sandblasting machine, and does not need to add a new pump, thereby saving the cost of equipment and energy consumption.

2. The present invention uses a sand control plate and a tapered design to reduce the washback of gold sand in the sand wholesaler, accelerate the sedimentation and sand water separation effect, and thus reduce the time required for sand exchange.

3. The present invention is based on the logical concept of calculating the height of the raw water launch pipe. By achieving intermittent water transfer, the raw water settles in a relatively long time, and thus accelerates the sand water separation effect, and consequently the sand. Reduce the time required for replacement.

4). The present invention applies water amount control and solenoid valve on / off control, and can prevent overflowing from the stirrer and contaminating the factory building due to excessive circulating water amount.

5. The sand change system according to the present invention continuously sprays the sandblasting step in the sandblasting machine with a spray liquid that gradually decreases in concentration during operation, and when the concentration drops to the lowest (nearly fresh water). At the same time, it is possible to greatly clean the labor costs required to clean the machine wall, transport rollers, stirring jars and pipes all at the same time and replace the sand by man-made.

6). In addition to the separation of sand and water that can be used in sandblasting machines, the sand exchange system that applies the intermittent transport and logical conceptual design of sand water specific gravity difference is a sand water mixed spray liquid in which the specific gravity of other solids is larger than the liquid state. It can also be applied to solid-liquid separation processing.

It is a perspective arrangement view of the present invention. It is a perspective exploded view of the present invention. It is a perspective section schematic diagram of the present invention. FIG. 3 is a second perspective arrangement view of the present invention. It is a schematic diagram of the connection of the sandblasting machine of this invention. 3 is a flowchart of the present invention.

As can be understood from FIG. 1 and FIG. 2, the sand exchange system of the present invention is composed of one inner ridge 11 and an outer ridge 12 having a tapered bottom, and the bottom of the outer ridge 12. The sand exchange tower 1 is locked on one support frame 5 corresponding to the plurality of connection plate sets 6 by installing a plurality of connection holes 121, and A tapered portion 24 is formed on the top of the housing, and a plurality of through holes 25 are formed on the surface of the top of the tapered portion 24. Further, a plurality of lock body sets 8 are provided below the outer shell 12 of the sand exchange tower 1. Are connected to each other by a single ring bolt set 21 at a place where the body of the sand wholesaler 2 and the taper portion 24 are connected. And one lock bolt set 8 and one lock pad 82 are arranged. The sand wholesaler 2, one connection plate 63, one pad 61, and one bolt 62, and a connection plate set 6 fixed to the surface of the outer cage 12 of the sand exchange tower 1 are further connected plate set Sand exchange corresponding to a plurality of connection plate sets 6 by installing a plurality of connection plate sets 6 having a plurality of fixing holes 64 at the bottom of 6 and a plurality of connection holes 51 on the top surface thereof This book includes one support frame 5 that locks the tower 1 on the support frame 5 and one water pipe set 3 that is installed on the inner wall 11 and the outer wall 12 of the sand exchange tower 1, respectively. The idea is to connect one sandblasting machine 7 (for example, FIG. 5) with the above-mentioned structure and to mix the sand and water with the sand and water in the stirrer 72 (for example, FIG. 5) of the sandblasting machine 7 (for example, FIG. 5) The liquid is introduced into the sand exchange tower 1 via the water pipe set 3, and intermittent water flow and difference in specific gravity of sand water Thus, the sand is mixed with the sandy water mixed spray liquid in the upper layer of the inner shell 11 and introduced into the outer shell 12 of the sand exchange tower 1 by the overflow method, and further sandblasting machine 7 (for example, FIG. 5) Recirculate to the stirring bowl 72 (for example, Fig. 5), reduce the sand concentration of the sand-water mixed spray liquid in the stirring bowl 72 (for example, Fig. 5), and the sand / water-mixed spray liquid will constantly exchange sand with the sandblasting machine 7 Since it circulates in the tower 1, the concentration of the sand-water mixed spray liquid circulating in the stirring bowl 72 (for example, FIG. 5) of the sandblasting machine 7 (for example, FIG. 5) gradually decreases.

As shown in FIG. 2, FIG. 3, FIG. 4 and FIG. 5, one sabo board 13 is installed in the inner shell 12 of the sand exchange tower. The water pipe set 3 includes a sand wholesale drain pipe 22, a washing drain pipe 23, a raw water launch pipe 31, a tap water launch pipe 32, a tap water launch pipe 322 on the outer side, a tap water launch pipe 321 on the inner side, and a circulation pipe 33. The overflow pipe 34 and the drain pipe 35 are constructed, and the water pipe set 3 is installed on the tower body of the sand exchange tower, and the height of the raw water launch pipe 31 is pumped in the stirring rod 71 of the sandblasting machine 7. The optimum height obtained by calculation based on the control of the volume of the spray liquid sprayed between the upper and lower liquid levels of the liquid level gauge 79 already exhibits the effect of accelerating the precipitation by intermittent transport. Further, by providing one first solenoid valve in the tap water launch pipe 32, the launch of the tap water is controlled. By designing the tap water launch pipe 32 to be a three-way pipe type, the launch area is divided into two parts, the inner water tap water launch pipe 321 and the outer water tap water launch pipe 322. The outer rod manual valve 323 and the outer rod manual valve 324 control the launching of the inner rod 11 and the outer rod 12, respectively.

In addition, as shown in FIGS. 2 and 5, in order to contribute to the inclination of the wholesale gold-hard sand, one annular bolt set 21 is provided at a place where the body of the sand wholesaler 2 and the tapered portion 24 are connected. Two drain outlets, a sand wholesale drain pipe 22 and a washing drain pipe 23, are installed in the body of the sand wholesaler 2 which are fixedly contacted. In addition, the launch of the raw water is controlled by connecting the first solenoid valve 73 and the second solenoid valve 74 on the pipe line between the base of the sandblasting machine 7 of the present invention and the sand exchange tower 1 . The lifting cart 4 is used for wholesale and transport of the sand exchange tower 1.

Also, as shown in FIG. 5, the sandblasting machine 7 always includes a plurality of steps such as an inlet step 711, a sandblast step 712, an inclined water washing step 713, an intermediate pressure water washing step 714 and an outlet step 715. The sand water mixed spray liquid in which the required concentration of the sandblasting step 712 is about 20% is stirred by the stirrer 72, pressurized through the two sandblasting pumps 76, transported to the sandblasting step 712, and the nozzle The surface of the substrate (not shown) is sprayed to achieve the required uniform roughening effect. The inlet stage 711, the inclined water washing stage 713, and the medium pressure water washing stage 714 are all provided with fountain tubes to wash the substrates (not shown) before and after sandblasting. Normally, the water in both the inlet stage 711 and the inclined washing stage 713 flows back to the stirring bowl 72, and when the liquid level of the stirring bowl 72 reaches the upper limit, the circulation pump 77 is automatically opened, and the spray liquid flows into the sand. After performing basic separation through the water separator 75, the light is transmitted to the filter 78 and filtered, and then sent back to the inclined water washing stage 713 to spray the substrate. In the present invention, when assembling, a three-way pipe is added on the pipe line between the circulation pump 77 and the sand water separator 75 so that the sand water mixed spray liquid enters and leaves the sand water separator 75 and the sand water separator 75. By providing a first solenoid valve 73 and a second solenoid valve 74 in the outlet pipeline communicating with the exchange tower 1, the opening and closing of the pipeline are controlled. When the sand blasting machine 7 performs sand blasting work, the pipe reaching the sand water separator 75 is opened and the pipe reaching the sand exchange tower 1 is closed. By closing the pipe line that reaches to the sand exchange tower 1 and opening the pipe line that reaches the sand exchange tower 1, the sandblast liquid extracted from the stirring tank 72 by the circulation pump 77 flows into the sand exchange tower 1.

With reference to FIG. 1, FIG. 3 and FIG. 5, when the sand exchange system is started, in addition to switching the above-mentioned pipe line through the electric control system, by further opening the stirring motor 721 of the stirring rod 72 The sand and water are mixed uniformly, and at the same time, the second electromagnetic valve 74 installed in the tap water launch pipe 32 of the sand exchange tower 1 is opened, so that the tap water flows into the inner wall 11 of the sand exchange tower 1. When the tap water level in the sand exchange tower 1 reaches the height of the raw water launching port 31, the tap water naturally flows from the raw water launching port 31 into the stirring trough 72, so that the liquid level in the stirring trough 72 is reached. Gradually increases. The liquid level in the stirring tank 72 reaches the normal spray liquid level set by the liquid level gauge 79, that is, the liquid level at which the circulation pump 77 closes (lower liquid level), and the stirring motor is started for 3 minutes or more. When already sufficiently stirred, the pump of the sandblasting machine 7 is automatically activated to perform spraying (no substrate), and the spray liquid again flows into the stirring bowl 72 through the sandblasting step. When the liquid level in the stirring tank 72 reaches the upper limit of the liquid level of the liquid level gauge 79, the circulation pump 77 is automatically activated, and the spray liquid is transported to the inner tank 11 of the sand exchange tower 1 through the raw water launch pipe 31. Then, it mixes with tap water in the pot, and a part of the Kongo sand naturally flows into the sand wholesaler 2. When the liquid level of the inner tub 11 becomes higher than the upper edge of the inner tub 11, the sand-water mixed spray liquid overflows into the outer tub 12 and flows into the stirring tub 72 via the circulation pipe 33. When the liquid level of the stirring vessel 72 falls to the lower limit liquid level, the circulation pump 77 automatically closes. At this time, the sand and sand mixed spray liquid in the sand exchange tower 1 is squeezed into the screen of the sand control plate 13. After the taper design of 131 and the outer cage 12 of the sand exchange tower 1, the gold sand is naturally settled on the sand wholesaler 2, and the liquid level in the stirring vessel 72 reaches the upper limit of the liquid level of the liquid level gauge 79. Then, the circulation pump 77 is started again to perform other circulation, and at this time, the sabo board 13 at the bottom of the inner rod 11 and the tapered design of the outer rod 12 are cut off by the impact of the raw water launch to the inner rod 11 It can reduce the amount of gold sand. The concentration of the spray liquid is gradually reduced through repeated circulation of the above-described process, and further the concentration of the spray liquid is gradually reduced. Therefore, the inner wall of the machine base, the transport roller (not shown), the stirring tank in the sandblast step 712 Sequentially wash 72 and sandblast line.

As shown in FIG. 6, the operation flow of the sand exchange system of the present invention is as follows. Step 1: Open the sand change switch and start. Step 2: The sand water separation pipe solenoid valve switches to the sand exchange system. Step 3: Start the stirring motor and stir the spray liquid. Step 4: Determine to start the agitation motor and agitate the spray liquid. Step 5: Determine whether the level of the stirring tank has already reached the level of the water supply, and if so, perform Step 6 and start the sand water separation pump. After replenishing, the agitation motor is started again to agitate the spray liquid. Step 7: Extract the spray solution and check the concentration of the spray solution. Step 8: Determine whether the spray liquid concentration has already reached 5% or less, and if so, the sand change switch can be closed, otherwise extract the spray liquid again and check the spray liquid concentration To do.

In addition, as shown in FIG. 1, FIG. 2 and FIG. 5, the intermittent startup time of the circulation pump 77 is related to the height of the raw water launch port 31, and if it is too high, the amount of water replenished in advance is too large. 77 may operate continuously, reducing the effect of precipitation and extending sand exchange time. When the liquid level in the sand exchange tower 1 reaches the height of the overflow pipe 34, the spray liquid is discharged from the overflow pipe 34, reducing the recovery of the gold sand and contaminating the drainage system of the factory building. When it comes to drought, there is too much launching amount, and even if it flows out from the overflow pipe 34, the discharge is not in time, and it may overflow from the top of the tower and contaminate the factory building. Conversely, if the height of the raw water launch port 31 is too low, the amount of water replenished in advance will be insufficient, and the circulation pump 77 cannot be started. Therefore, the opening height of the raw water launch port 31 is set to an appropriate proportion based on the volume between the upper and lower limits of the liquid level gauge 79 of the stirring bar 72, and the height of the launch port of the sand exchange tower 1 is set. It is necessary to calculate the appropriate height of the raw water launching port 31 by considering it as the necessary volume of the lower inner shaft 11 and the sand wholesaler 2.

In addition, as shown in FIGS. 1, 2 and 3, the present invention is configured so that the manual valve 323 on the inner side, the manual valve 324 on the outer side, By opening the manual valve 221 of the sand wholesale drain pipe and the manual valve 231 of the cleaning drain pipe above the sand wholesaler 2, draining the upper layer water to the drain pipe of the factory building and holding a small amount of water, Maintains the necessary moisture of the gold sand and contributes to subsequent use. The lifting cart 4 arranged according to the present invention is lifted up and attached to the bottom of the sand wholesaler 2 to support the weight of the sand wholesaler 2 and the internal sand water. The load on the sand canopy 2 can also be reduced, and the sand wholesaler 2 can be easily disassembled, and the annular bolt set 21 of the sandpowder 2 can be rotated and loosened. If the lock body set 8 of the sand wholesaler 2 is rotated and removed, and the lock bolt 81 and the fixing pad 82 are removed, the sand cone tower 1 can be cleaned by disassembling the lower cone. The washing drain pipe 23 at the bottom of the sand wholesaler 2 is used for washing and draining the sand wholesaler 2.

There are two types of shutdown in the present invention.

Regular monitoring method: A sample of the spray liquid taken out from the stirring vessel is put into a 500 cc test tube, and after precipitation, the concentration is analyzed. If the concentration is lower than the allowable concentration, the sample is shut down.

Time calculation method: Various common numbers are determined through the methods and tests described above, and the time required for the permissible concentration is calculated when the sand is changed. After that, when it is necessary to change the sand, the operation time on the timer is set based on the number of the gold and sand used, and it automatically shuts down when the time is reached.

Referring to FIGS. 1 and 5 again, the design of the shutdown flow of the present invention is as follows. In the present invention, when shutting down, water in the inner column 11 of the sand exchange tower 1 can be circulated to the stirring column 72 via the raw water launch pipe 31, and water in the outer column 12 can also be circulated from the circulation line 33 to the stirring column 72. . If the manual valve 722 of the overflow pipe of the stirring rod 72 does not open and the amount of water in the circulating flow exceeds the amount of water that can be stored in the stirring rod 72, the water overflows from the upper edge of the stirring rod 72 and eventually on the floor plate of the factory building. Overflow can cause contamination of the work environment.

Therefore, in order to prevent water overflow, the present invention employs the following two prevention measures.

1. Control of water volume: In the calculation of the height of the raw water launch pipe, the maximum water volume of the entire system is considered to be smaller than the capacity of the stirring tank.

2. Solenoid valve switch: In the present invention, a solenoid valve is provided on the raw water launch pipe, and when the sand exchange system starts (boots), the solenoid valve automatically opens (that is, the sand water separator solenoid valve). Closes). When the shutdown switch of the sand change system is pressed, the solenoid valve on the raw water launch pipe is automatically closed, and at the same time, the solenoid valve of the sand water separator is opened to complete the standby state of sandblasting.

1 Sand exchange tower
2 Sand wholesaler
3 water tube set
4 Lifting cart
5 Support tower
6 Connection board set
7 Sandblasting machine
8-chain tablet set
11 Inside
12 Bund
13 Sabo
21 Annular bolt set
22 Sand wholesale drain pipe
23 Washing drain
24 Taper part
25 Through hole
31 Raw water launch pipe
32 Tap water launch pipe
33 Circulator
34 overflow pipe
35 Drain pipe
51 Connection hole
61 volts
62 pads
63 Connection board
72 Stirrer
73 First solenoid valve
74 Second solenoid valve
75 Sand water separator
76 Sandblast pump
77 Circulation pump
78 Filter
79 Level gauge
81 Locking bolt
82 Fixed pad
131 sieve
221 Manual valve for sand wholesale drain pipe
231 Manual drain valve
321 Internal water tap water launch pipe
322 The tap water launch pipe of the Bund
323 Manual valve for inner cylinder
324 Manual valve on the outside
711 Entrance step
712 Sandblast step
713 Inclined flushing step
714 Medium pressure water washing step
715 Exit step
721 Stirring motor
722 Overflow pipe manual valve

Claims (7)

A sand exchange system,
The sand exchange tower is composed of one inner shell and an outer shell whose bottom has a taper shape, and a plurality of connection holes are provided in the bottom of the outer shell, so that the sand exchange tower corresponds to a plurality of connection plate sets. One sand exchange tower locked on the frame,
A taper portion is formed on the top and a plurality of through holes are formed on the surface of the top portion of the taper portion, and further locked by a plurality of lock body sets corresponding to the lower part of the outer casing of the sand exchange tower. Two sand wholesalers,
A plurality of connection plate sets fixed to the surface of the outer wall of the sand exchange tower and further having a plurality of fixing holes at the bottom of the connection plate set;
One support frame that locks the sand exchange tower on the support frame corresponding to a plurality of connection plate sets by installing a plurality of connection holes on the top surface;
Each includes a water tube set laid on the inner and outer walls of the sand exchange tower,
With the above-mentioned structure, one sandblasting machine is connected, and the mixed sand and water sand spray solution is introduced into the sand exchange tower through the water pipe set, and the intermittent water flow Due to the difference in transport and sand water specific gravity, gold sand is precipitated on the inner side of the sand exchange tower, and the sand water mixed spray liquid in the upper layer of the inner side is introduced into the outer side of the sand exchange tower by the overflow method, and further the sand blasting machine is stirred. The sand water mixing spray liquid in the agitating pad is reduced to reduce the sand concentration, and the sand water mixing spray liquid is continuously circulated through the sandblasting machine and the sand exchange tower, so the sand water mixing gradually decreases in concentration. A sand exchange system, characterized in that the spray liquid is circulated through a stirring bowl of a sandblasting machine. 2. The sand exchange system according to claim 1, wherein one sabo board is installed in the inner casing. 2. The sand exchange system according to claim 1, wherein the sand wholesaler is fixed to a place where the casing and the taper portion of the sand wholesaler are connected by one annular bolt set. Each water pipe set consists of a sand wholesale drain pipe, a washing drain pipe, a raw water launch pipe, a tap water launch pipe, a tap water launch pipe on the outer side, a tap water launch pipe on the inner side, a circulation pipe, an overflow pipe, and a drain pipe. The sand exchange system according to claim 1, wherein 2. The sand blasting system used for the sand blasting machine according to claim 1, wherein one lifting carriage is disposed below the sand wholesaler. 2. The sandblasting system used in the sandblasting machine according to claim 1, wherein each of the lock body sets is composed of one fixing bolt and one pad. 2. The sandblasting system used in the sandblasting machine according to claim 1, wherein each of the connection plate sets is composed of one connection plate, one pad, and one bolt.