KR910000574B1 - Mixing apparatus of blending liquid - Google Patents

Abstract

None.

Description

Pressurized air liquid mixing pump

1 is a piping system diagram of a pressurized air type liquid mixing pumping device in one embodiment of the present invention.

2 is a piping system diagram of a pressurized air liquid mixing pumping device in another embodiment.

* Explanation of symbols for main parts of the drawings

1: 1st diaphragm pump 2a, 2b, 9a, 9b: pump main body

3a, 3b, 10a, 10b: diaphragm 4,11: connecting rod

5a, 5b, 12a, 12b: air chamber 6a, 6b, 13a, 13b: liquid chamber

8: second diaphragm pump 16: switching valve

18: rubber hose (first pipeline) 19: rubber hose (second pipeline)

21: water supply hose (supply pipeline)

22a, 22b, 29a, 29b: backflow check valve (supply check valve)

23: water discharge hose (discharge pipeline)

24a, 24b, 31a, 31b: back flow check valve (outlet back check valve)

28: release agent supply hose (supply pipeline)

30: Release agent discharge hose (discharge pipeline)

33: mixing hose (mixing pipeline)

34: die cast machine spray device

The present invention relates to a pressurized air type liquid mixing and feeding device for mixing and feeding various kinds of liquids using pressurized air.

For example, a releasing agent used for die casting or casting is usually diluted with a certain ratio of water in use, and in this case, various dilution ratios are required.

As a compact and inexpensive mixing device used for such applications, the applicant of the present invention has already proposed a pressurized air liquid mixing pressure feeding device (see Japanese Patent Application Laid-Open No. 62-31935). That is, a diaphragm pump is connected by interlocking both pumps by using a diaphragm pump driven by pressurized air and a piston pump driven by pressurized air to communicate the air chamber of the diaphragm pump and the air chamber of the piston pump. The first liquid is fed into the furnace, and at the same time, the second liquid is fed by a piston pump to join the liquids and supply them to a spray device or the like.

In the above conventional configuration, since the piston type pump is used to pump the second liquid, wear of the slide portion of the piston and the seal member of the pump chamber is severe. That is, unlike a general cylinder device, the pump is a pump because the piston repeats the reciprocating motion all the time during the supply of the mixed liquid has been a problem. In particular, wear is remarkable when the liquid contains abrasive elements. For this reason, in the conventional apparatus, it was necessary to frequently check or repair the wear part, and thus the maintenance cost was high and the operation rate was low.

The object of the present invention is to eliminate the slide part lost due to wear included in the conventional apparatus, and even though it is frequently operated, it is not necessary to perform frequent checks or repairs, and it is possible to lower the maintenance cost by a large margin and to significantly improve the operation rate. It is possible to provide a pressurized air liquid mixing and conveying apparatus which can be proved to be very effective, especially when a polishing element is contained in a liquid.

Another object of the present invention is to provide a pressurized air type liquid mixing pressure feeding apparatus capable of mixing three or more kinds of liquids. Still another object of the present invention is to provide a pressurized air type liquid mixing pumping device capable of adjusting the mixing ratio of liquid. The above and other objects and novel features of the present invention will become apparent from the description and the accompanying drawings. Brief descriptions of representative ones of the inventions disclosed in the present application are as follows.

In order to achieve the above object, the pressurized air type liquid mixing pumping device of the present invention has a first diaphragm pump having a pair of pump bodies divided into an air chamber and a liquid chamber by a diaphragm, and a connecting rod connecting the diaphragms in these pump bodies to each other. The second diaphragm pump having the same configuration as the first diaphragm pump and the connecting rod of the first diaphragm pump are switched every time the stroke limit is moved to the air chamber of the pair of pump bodies of the first diaphragm pump. A switching valve for supplying pressurized air alternately; a first pipeline for communicating the air chamber of one pump body of the first diaphragm pump and the air chamber of one pump body of the second diaphragm pump; Air chamber of the other pump body of the diaphragm pump and air chamber of the other pump body of the second diaphragm pump A second pipeline for communicating is provided, and a first liquid supply pipeline and a first liquid discharge pipeline are communicated to a liquid chamber of each pump body of the first diaphragm pump, and the second diaphragm is connected. The second liquid supply pipeline and the second liquid discharge pipeline communicate with the liquid chamber of each pump body of the pump, and the first and second liquid supply pipelines prevent each liquid from flowing back in the liquid chamber. A supply side backflow stop valve, and a discharge side backflow stop valve for preventing each liquid from flowing back to the liquid chamber in the first and second liquid discharge pipe lines. It was set as the structure which joins the liquid discharge pipeline of into a mixing pipeline.

By the action of the switching valve, pressurized air is alternately supplied to the air chambers of the pair of pump bodies of the first diaphragm pump. The pressurized air drives the diaphragm pumps connected to each other by the connecting rods, thereby alternately discharging the first liquid from the liquid chambers of the pair of pump bodies. Moreover, since pressurized air supplied to the air chamber of the pair of pump main body of a 1st diaphragm pump is supplied to the air chamber of the pump main body of a 2nd diaphragm pump via a pipeline, it is a 2nd synchronism with a 1st diaphragm pump. The diaphragm pump is driven to discharge the second liquid. These first and second liquids are combined in a mixing pipeline to form a mixed liquid and are supplied to a predetermined place.

Example 1

Hereinafter, one embodiment of the present invention will be described with reference to FIG. 1 is a piping system diagram of a pressurized air liquid mixing pumping device according to an embodiment of the present invention, where (1) is a first diaphragm pump, and the first diaphragm pump 1 has a pair of pump bodies 2a and It consists of the connection rod 4 which connects 2b and center parts of the diaphragm 3a and 3b in each pump main body 2a and 2b. The space in each pump main body 2a and 2b is divided into air chambers 5a and 5b and liquid chambers 6a and 6b by diaphragms 3a and 3b.

(8) is a second diaphragm pump, and the second diaphragm pump (8) includes a pair of pump main bodies (9a) and (9b) and diaphragms (10a) and (10b) in each of the pump main bodies (9a) and (9b). It is composed of a connecting rod 11 for connecting the center of each other. The spaces in the pump main bodies 9a and 9b are divided into air chambers 12a and 12b and liquid chambers 13a and 13b by diaphragms 10a and 10b. That is, the 2nd diaphragm pump 8 is the same structure as the 1st diaphragm pump 1, and is smaller in capacity than the 1st diaphragm pump 1.

The air chambers 5a and 5b of the pump main bodies 2a and 2b of the first diaphragm pump 1 pass through an air supply pipe 15 having branch portions 15a and 15b, such as a compressor. At the branching point which communicates with the pressurized air supply source 15c, and the branching part 15a and 15b branch from the air supply pipe 15, the switching valve 16 switched by the connecting rod 4 is provided. In other words, the selector valve 16 is connected to the branched portion 15b in a state in which the connecting rod 4 reaches the stroke limit on the pump body 2a side and supplies pressurized air to the branched portion 15a side. The branched portion 15a is switched to a state of supplying pressurized air, and the connecting rod 4 reaches pressurized air on the branch portion 15b side by reaching the stroke limit on the pump body 2b side. It switches to the state which supplies pressurized air to the side. In the state where the switching valve 16 supplies pressurized air to the branch portion 15a side, the switch valve 16 releases air on the branch portion 15b side to the atmosphere, and in a state where pressurized air is supplied to the branch portion 15b side. It is comprised so that the air of the branch part 15a side may be discharge | released to air | atmosphere. The air chamber 5a communicates with the air chamber 12a of one pump main body 9a of the second diaphragm pump 8 via the rubber hose 18 constituting the first pipeline. 5b communicates with the air chamber 12b of the other pump main body 9b of the 2nd diaphragm pump 8 via the rubber hose 19 which comprises a 2nd pipeline.

The liquid chambers 6a and 6b in the pump bodies 2a and 2b of the first diaphragm pump 1 have a water supply hose 21 as a supply pipeline having branches 21a and 2b. Is connected to a water source 21c such as a water supply via a backflow stop valve as a supply side backflow stop valve for preventing water from the liquid chambers 6a and 6b from flowing to the branch portions 21a and 21b. 22a) and 22b are provided. The liquid chambers 6a and 6b communicate with a water discharge hose 23 as a discharge pipeline having branch portions 23a and 23b, and the liquid chamber 6a is provided in the branch portions 23a and 23b. Back flow stop valves 24a and 24b are provided as discharge side back flow stop valves for preventing water from flowing through the heads 6 and 6b.

The pump main bodies 9a and 9b of the second diaphragm pump 8 are provided with adjustment screws 26a and 26b for adjusting the strokes of the diaphragms 10a and 10b. The liquid chambers 13a and 13b of the pump bodies 9a and 9b are drums storing the release agent through a release agent supply hose 28 as a supply pipeline having branch portions 28a and 28b ( 28c), and the branching portions 28a and 28b are reverse flow blocking valves 29a and 29b as supply-side countercurrent blocking valves for preventing the release agents of the liquid chambers 13a and 13b from flowing out. Is provided. The liquid chambers 13a and 13b communicate with a release agent discharge hose 30 as a discharge pipeline having branches 30a and 30b, and the liquid chambers 13a in the branches 30a and 30b. Back flow stop valves 31a and 31b are provided as discharge side back flow check valves for preventing the release of the release agent into the () and (13b).

The water discharge hose 23 and the release agent discharge hose 30 are connected to a mixing hose 33 constituting the mixing pipeline, and the mixing hose 33 is connected to a die cast machine spray device 34 for injecting the mixed liquid. It is.

The operation is explained next. Now, the air chamber of the other pump body 2b of the first diaphragm pump 1 via the air supply pipe 15, the switching valve 16, and the branch 15b from the pressurized air supply source 15c ( It is said that pressurized air is supplied to 5b), and the connecting rod 4 advances just before the stroke limit of the pump main body 2b side (right side in FIG. 1). When the connecting rod 4 proceeds again and the connecting rod 4 reaches the stroke limit on the side of the pump body 2b, the switching valve 16 is switched by the connecting rod 4 so as to remove it from the pressurized air supply source 15c. Pressurized air is supplied to the air chamber 5a of one pump main body 2a via the air supply pipe 15, the switching valve 16, and the branching portion 15a. Thereby, the diaphragm 3a is depressed by pressurized air and deform | transformed, and the connecting rod 4 advances to the pump main body 2a side (left side in FIG. 1), and the liquid chamber 6a and the air chamber 5b are carried out. The volume of the liquid chamber 6b and the air chamber 5a increases at the same time as the volume of.

Accordingly, the water in the liquid chamber 6a is supplied to the mixing hose 33 through the branch 23a and the water discharge hose 23, and the water from the water source 21c is supplied to the supply hose 21 and the branch 21b. It is supplied to the liquid chamber 6b through. At this time, since the backflow stop valve 22a is provided in the branch portion 21a, water in the liquid chamber 6a does not flow out through the branch portion 21a.

Moreover, since the backflow stop valve 24b is provided in the branch part 23b, the water of the water discharge hose 23 does not flow into the liquid chamber 6b through the branch part 23b.

On the other hand, the pressurized air supplied to the air chamber 5a is also supplied to the air chamber 12a of one pump main body 9a of the second diaphragm pump 8 through the rubber hose 18. Thereby, the diaphragm 10a is depressed by pressurized air and deform | transformed, and the connection rod 11 advances to the pump main body 9a side (left side in FIG. 1), and the liquid chamber 13a and the air chamber 12b are carried out. The volume of the liquid chamber 13b and the air chamber 12a increases simultaneously with decreasing volume. Therefore, the release agent of the liquid chamber 13a is supplied to the mixing hose 33 through the branching portion 30a and the release agent discharge hose 30, and at the same time, the release agent of the drum 28c is released from the release agent supply hose 28 and the branch portion ( It is supplied to the liquid chamber 13b through 28b).

At this time, since the backflow blocking valve 29a is provided in the branching portion 28a, the release agent in the liquid chamber 13a does not flow out through the branching portion 28a. Moreover, since the backflow stop valve 31b is provided in the branch part 30b, the release agent of the release agent discharge hose 30 does not flow back into the liquid chamber 13b through the branch part 30b. In addition, the pressurized air of the air chamber 12b is exhausted to the air chamber 5b through the rubber hose 19, and the pressurized air of the air chamber 5b is exhausted from the switching valve 16 through the branch 15b. do.

When the connecting rod 4 reaches the stroke limit on the pump body 2a side, the switching valve 16 is switched by the connecting rod 4 so that the pressurized air is supplied from the pressurized air source 15c to the air supply pipe 15. Is supplied to the air chamber 5b of the other pump main body 2b via the ") and the switching valve 16 and the branch 15b. Thereby, the diaphragm 3b is depressed by pressurized air, and the connection rod 4 advances to the pump main body 2b side (right side in FIG. 1), and the liquid chamber 6b and the air chamber 5a are carried out. The volume of the liquid chamber 6a and the air chamber 5b increases simultaneously with decreasing volume.

Therefore, the water in the liquid chamber 6b is supplied to the mixing hose 33 through the branch 23b and the water discharge hose 23, and the water of the water source 21c is supplied to the supply hose 21 and the branch 21a. It is supplied to the liquid chamber 6a through. At this time, since the backflow stop valve 22b is provided in the branch portion 21b, water in the liquid chamber 6b does not flow out through the branch portion 21b. Moreover, since the backflow stop valve 24a is provided in the branching section 23a, the water of the water discharge hose 23 does not flow into the liquid chamber 6a through the branching section 23a.

On the other hand, the pressurized air supplied to the air chamber 5b is also supplied to the air chamber 12b of the pump main body 9b on the other side of the second diaphragm pump 8 through the rubber hose 19. As a result, the diaphragm 10b is pressed and deformed by the pressurized air, and the connecting rod 11 proceeds to the pump main body 9b side (right side in FIG. 1) and the liquid chamber 3b and the air chamber 12a. The volume of the liquid chamber 13a and the air chamber 12b increases at the same time as the volume of.

Therefore, the release agent of the liquid chamber 13b is supplied to the mixing hose 33 through the branching portion 30b and the release agent discharge hose 30, and at the same time, the release agent of the drum 28c is released from the release agent supply hose 28 and the branching portion 28a. ) Is supplied to the liquid chamber 13a. At this time, since the backflow stop valve 29b is provided in the branching portion 28b, the release agent in the liquid chamber 13b does not flow out through the branching portion 28b. Moreover, since the backflow stop valve 31a is provided in the branch part 30a, the release agent of the release agent discharge hose 30 does not flow into the liquid chamber 13a through the branch part 30a. In addition, the pressurized air of the air chamber 12a is exhausted to the air chamber 5a through the rubber hose 18, and the pressurized air of the air chamber 5a is exhausted from the switching valve 16 through the branch 15a. do.

By the above operation being repeated continuously and alternately, the mixing hose 33 is always supplied with water and a release agent, and the mixed liquid of this water and release agent is supplied to the die-cast machine spray apparatus 34 through the mixing hose 33. . Since the first diaphragm pump 1 and the second diaphragm pump 8 always operate in conjunction with each other, for example, the discharge amount per unit time of the first diaphragm pump 1 is 2200 cc, and the second diaphragm pump If the discharge amount per unit time of (8) is 52 cc, the stock solution of the releasing agent is diluted almost 42 times and sprayed from the die-cast machine spray apparatus 34. This dilution rate can be arbitrarily set by adjusting the movable range of the diaphragm 10a and 10b, ie, the stroke of the connecting rod 11, with the adjustment screws 26a and 26b.

Thus, since the second diaphragm pump 8 is used as the release agent pump, there is no wear problem of the slide portion as in the piston type pump in the conventional apparatus, and thus the inspection or repair is frequently performed despite the large number of operation times. It is not necessary to reduce the maintenance cost, and the operation rate can be improved. In addition, since diaphragm pumps are distributed in the market and can be purchased at low cost, the manufacturing cost is solved compared to piston pumps.

Example 2

FIG. 2 shows a second embodiment, and three or more kinds of liquids can be mixed by connecting the second diaphragm pumps 8 in parallel in this manner. Moreover, the mixing ratio of each liquid can be arbitrarily adjusted by adjustment of the adjustment screws 26a and 26b.

Moreover, in the said Example, although the example which mixes the die cast mold release agent was demonstrated, this invention is not limited to this, It can use for mixing and pumping of all the liquids.

Moreover, in the said Example, although the adjustment screw 26a and 26b were provided in the pump main bodies 9a and 9b of the 2nd diaphragm pump 8, the adjustment screw 26a and 26b did not support any of the adjustment screws 26a and 26b. It may be provided only on one side.

As described above, according to the present invention, since the diaphragm pump is used not only as the pump for the first liquid but also as the pump for the second liquid, there is no problem of abrasion of the slide portion as with the piston pump in the conventional apparatus, and thus the number of operations In spite of the large number, there is no need for frequent inspection and repair, which can greatly reduce the maintenance cost and improve the operation rate. This is particularly noticeable when the polishing element is included in the liquid.

In addition, the diaphragm pump has a variety of products in the market, and can be purchased at low cost, so that the manufacturing cost becomes higher than that of the piston pump.

Claims (4)

The pair of pump bodies 2a and 2b partitioned inside the air chambers 5a and 5b and the liquid chambers 6a and 6b by the diaphragms 3a and 3b and the diaphragms in these pump bodies 2a and 2b are mutually connected. A pair of first diaphragm pumps 1 having a connecting rod 4 to connect therewith, a second diaphragm pump 8 having the same configuration as the first diaphragm pump 1, and the first diaphragm pumps. Each time the connecting rod 4 moves to the stroke limit, it alternately supplies pressurized air to the air chambers 5a, 5b of the pair of pump bodies 2a, 2b of the first diaphragm pump 1. Air chamber 5a of the switching valve 16, one pump main body 2a of the said 1st diaphragm pump 1, and the air chamber of one pump main body 9a of the 2nd diaphragm pump 8 ( The first pipeline 18 communicating 12a, the air chamber 5b of the other pump body 2b of the first diaphragm pump 1, and the second diaphragm pump. The 2nd pipeline 19 which connects the air chamber 12b of the pump main body 9b of the side is provided, and the liquid chamber of each pump main body 2a, 2b of the said 1st diaphragm pump 1 ( The first liquid supply pipeline 2 (1) and the first liquid discharge pipeline 23 communicate with each other 6a, 6b, and each pump body 9a, 9b of the second diaphragm pump 8 The second liquid supply pipeline 28 and the second liquid discharge pipeline 30 are connected to the liquid chambers 13a and 13b, and the liquid supply pipelines of the first and the second liquid supply pipelines are each allowed to flow back. Supply side backflow check valves 22a, 22b, 29a, and 29b for blocking are provided, and discharge side backflow check valves 24a for preventing each liquid from flowing back into the backflow chamber into the liquid chamber in the first and second liquid discharge pipelines. , 24b, 31a, and 31b, and the first liquid discharge pipeline 23 and the second liquid discharge pipeline 30 in the mixing pipeline 33 A pressurized air type liquid mixing pumping device, characterized in that joined. The pressurized air liquid mixed pressure feeding device according to claim 1, wherein the second diaphragm pumps (8) are connected in parallel. The adjustment according to claim 1 or 2, wherein the pump main body 9a, 9b of the second diaphragm pump 8 is regulated so as to adjust the movement range of the diaphragm 10a, 10b. A pressurized air liquid mixing pressure feeding device in which screws (26a, 26b) are fitted. The pressurized air-liquid mixed liquid pressurization according to claim 1 or 2, wherein an adjustment screw is fitted to one pump main body of the second diaphragm pump 8 so as to adjust the movement range of the diaphragm. Device.

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