KR100204094B1 - Air pump for transfering fluid - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air pump capable of transporting fluids such as paints and oils, and more particularly, to an air pump provided with two different fluids so that they can be separately transported, .

The air pump of the present invention has a housing 1 composed of a central chamber 11 and first and second chambers 12 and 13 on both sides thereof. Ports 111, 112 and 113 communicating with the respective chambers are provided on the front wall of the central chamber 11. The first and second chambers 12 and 13 are provided with first and second diaphragms 31 and 32 which divide the first and second chambers 12 and 13 into two chambers, respectively. The two diaphragms 31 and 32 are connected to both ends of the main shaft 2 inserted through the central chamber 11 so as to be movable left and right. The first spool 5 is inserted into the sleeve 118 through the central chamber 11 so as to be movable in the left and right direction and one end of the first spool 5 is connected to the first shaft of the second diaphragm 32. The compressed air is introduced into the first air chamber 121 through the first port 111 or the second air chamber 131 through the third port 113 by interlocking with the first spool 5, The switching valve 6 is coupled to the front wall of the central chamber 11 so as to sequentially switch the injection of the compressed air into the central chamber 11.

Description

Air pump for fluid transfer

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an air pump capable of transporting fluids such as paints, oils, and the like, and more particularly to an air pump capable of transporting two different fluids separately, To the air pump.

In transferring the fluid, various types of hydraulic pumps such as a gear pump, a vane pump, and a plunger pump are used, and these are usually driven by a motor.

However, the hydraulic pump is not only complicated in structure, but also expensive, has a low discharge pressure, and has a small discharge capacity, which limits the use range, and has a risk of leakage or electric shock.

As an apparatus capable of transferring a fluid other than the hydraulic pump driven by the motor, there is an air pump configured to transfer the fluid by reciprocating a cylinder, a plunger, or a spool by compressed air.

However, the conventional air pump, which is configured to transfer the fluid by compressed air, also has a problem in that the discharge pressure is low, the discharge pressure is not constant, and the discharge amount is small.

In addition, the conventional hydraulic pumps and air pumps described above can not transfer two different fluids separately or two fluids can not be mixed and transported.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a fluid transfer air pump capable of transferring two different fluids separately from one another or mixing two different fluids .

It is a further object of the present invention to provide an air pump for fluid transfer which is capable of achieving a high discharge pressure, uniformity, and a large discharge amount.

FIG. 1 is a front view showing an air pump according to the present invention. FIG.

The second figure is the left side view.

3 is a cross-sectional view taken along line III-III of FIG. 2;

4 is a cross-sectional view taken along line IV-IV in FIG. 3;

FIG. 5 is a partially exploded exploded perspective view showing the housing. FIG.

FIG. 6 is a rear view showing the switching valve. FIG.

7 is an exploded perspective view showing a switching valve;

FIG. 8 is a sectional view showing an operating state of the air pump according to the present invention; FIG.

DESCRIPTION OF THE REFERENCE NUMERALS

1: housing 2:

5, 62: spool 6: switching valve

11, 12, 13: chamber 31, 32: diaphragm

41: discharge pipe 42: suction pipe

44, 45: opening / closing valve 61: casing

63: valve seat 64: valve body

111, 112, 113, 114, 115, 614, 615, 631, 632, 633:

116: Air outlet port 118: Sleeve

121, 131: air chamber 122, 132: fluid chamber

In order to achieve the above object, the present invention provides a plasma processing apparatus comprising a central chamber and first and second chambers detachably coupled to the left and right sides of the central chamber, wherein the first chamber and the center chamber are communicated with each other, Wherein a front side wall of the central chamber is provided with a first port communicating with the first chamber, a second port communicating with the central chamber, a third port communicating with the second chamber, A first fluid discharge valve and a first fluid suction valve are formed in order on the upper and lower portions of the first chamber, respectively, and the first fluid discharge valve and the second fluid discharge valve are formed in this order on the rear wall of the central chamber, A housing having a second fluid discharge valve and a second fluid suction valve formed on upper and lower portions of the second chamber; A main shaft passing through the central chamber so as to be movable left and right and having both ends thereof in the first chamber and the second chamber; The center portion is fixed at both ends of the main shaft and the edge portion is held by the engagement of the side edge portions of the central chamber with the edge portions of the first chamber and the second chamber to separate the first chamber from the first air chamber and the first fluid chamber And first and second diaphragms for partitioning the second chamber into a second air chamber and a second fluid chamber, respectively; A first spool installed to the left and right of the sleeve of the center chamber and having a left end connected to an inner surface of the first diaphragm; In order to switch sequentially the injection of the compressed air into the first air chamber through the first port or the injection of the compressed air into the second air chamber through the third port by interlocking with the first spool, And a switching valve coupled to the front wall.

The switching valve has an air inlet formed at the front side thereof and an opening corresponding to the first port, the second port and the third port formed at the rear side, and a fourth port corresponding to the fourth port and the fifth port, A casing having a 5 'port formed therein; A second spool which is installed in the casing so as to be able to move up and down and whose lower end is configured to sequentially open and close the fourth port and the fifth port; A valve seat formed at an opening of the casing, wherein the first port, the second port and the third port communicate with the first port, the second port and the third port; The first port and the second port are communicated with each other and the first port and the second port are isolated from the inside of the casing in accordance with the upward and downward movement of the second spool, And a valve body provided on the outer circumferential surface of the second spool so as to isolate the second and third ports from the inside of the casing.

According to the present invention, there is also provided a fluid discharge tube connected to the first fluid discharge valve and the second fluid discharge valve in an upper portion of the housing, respectively, and a first fluid suction valve and a second fluid suction valve And a fluid suction pipe that is connected to communicate with each other.

It is preferable that the discharge pipe and the suction pipe are openable and closable between the two outlets, that is, the central part is, for example, a valve.

According to the air pump of the present invention as described above, when the compressed air injected into the casing of the switching valve through the air inlet port is at the lowered position of the second spool, And flows into the air chamber. By the inflow of the compressed air, the first diaphragm is pushed to expand the first air chamber and the first fluid chamber shrinks. As a result, the main shaft moves toward the first chamber and the second air chamber contracts and the second fluid chamber expands. As described above, the fluid that has already flown into the first fluid chamber due to the contraction of the first fluid chamber is discharged through the first fluid discharge valve and transferred along the discharge pipe. And the fluid is sucked into the second fluid chamber through the suction pipe and the second fluid suction valve by the expansion of the second fluid chamber. Meanwhile, in the above process, the compressed air in the casing flows into the sleeve through the fourth port and the fourth port, and the compressed air introduced into the sleeve passes through the outer peripheral surface of the first spool, 'Port. The second spool is raised by the pressure generated by the flow, and the compressed air introduced into the casing again flows into the second air chamber through the third port and the third port, so that the second fluid chamber is contracted at this time, The fluid chamber expands. Accordingly, the fluid introduced into the second fluid chamber is discharged through the second fluid discharge valve, and the fluid is sucked into the first fluid chamber through the suction pipe and the first fluid suction valve. In the above process, when the second air chamber is inflated, the compressed air existing in the first air chamber passes through the first port, the second port, the second port and the inside of the central chamber, do. On the other hand, when the first air chamber is inflated, the compressed air present in the second air chamber passes through the third port, the third port, the second port, the second port, . On the other hand, when the second air chamber reaches a state where the second air chamber can no longer be expanded, the pressure of the compressed air in the case acts to lower the second spool, so that the second spool descends, So that two different fluids can be transported through different paths, respectively.

Other features and advantages of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings.

Fig. 1 is a front view showing the air pump according to the present invention, Fig. 2 is a left side view thereof, Fig. 3 is a sectional view taken along the line III-III in Fig. 2, and Fig. 4 is a sectional view taken along line IV-IV in Fig.

As shown in the drawings, the air pump according to the present invention has a left-right shape as a whole.

In the figure, reference numeral 1 denotes a housing, which comprises a central chamber 11 and first and second chambers 12 and 13 on both sides thereof. Each of the first and second chambers 12 and 13 is formed in a substantially corrugated shape and each of the edges of the first chamber 12 and the second chamber 13 is formed by the edge portions of the central chamber 11 and the plurality of bolts 15 and the nuts 16 And a space is formed between the inner circumferential surfaces of the first chamber 12 and the second chamber 13 and both side walls of the central chamber 11 by the engagement.

A first port 111, a second port 112 and a third port 113 are formed in this order on the front wall of the central chamber 11, A port 114 and a fifth port 115 are formed in the central chamber 11 and an air outlet 116 is formed in a rear wall of the central chamber 11. Further, it is preferable that the muffler 117 is coupled to the air outlet 116 so as to reduce the exhaust noise when the compressed air is discharged.

3 to 5, the first port 111 formed in the central chamber 11 includes a first chamber 12 (a chamber located on the right side in FIG. 4), a second port 112 are formed so as to communicate with the central chamber 11, and the third port 113 communicate with the right chamber (the chamber on the left side in Fig. 4), respectively. Accordingly, when the compressed air is injected through the first port 111, the compressed air flows into the first chamber 12. When the compressed air is injected through the second port 113, the compressed air flows into the second chamber 13, When the compressed air is injected through the second port 112, the compressed air passes through the inside of the central chamber 11, the air outlet 116 formed in the rear wall of the central chamber 11, and the muffler 117 And is discharged to the outside air.

Reference numeral 2 in FIG. 3 and FIG. 4 denotes a main shaft. The main shaft 2 is movably supported through the central chamber 11 so as to be horizontally movable. Both ends of the main shaft 12 are accommodated in the first chamber 12 and the center chamber 11 Is installed to be placed.

The central portions of the first diaphragm 31 and the second diaphragm 32 are fixed by brackets 33 and 34 to both ends of the main shaft 2 installed as described above. Are sandwiched between the side edge portions of the center chamber 11 and the edge portions of the first chamber 12 and the second chamber 13. [ That is, when the chambers are assembled to each other by sandwiching the edges of the diaphragms 31 and 32 between the center chamber 11 and the edge portions of the first chamber 12 and the second chamber 13, The edges of both diaphragms 31 and 32 can be easily fixed.

By the assembly of the diaphragms 31 and 32 as described above, the first chamber 12 and the second chamber 13 are partitioned left and right with the two diaphragms 31 and 32 interposed therebetween. That is, the space of the first chamber 12, which is formed in the first chamber 12 and is located inside the first diaphragm 31, is formed in the first chamber 12, which is located outside the first diaphragm 31, And a first air chamber communicating with the first port (111). The space of the second chamber 13 located outside the second diaphragm 32 is formed by the second fluid chamber 132 and the space of the second chamber 13 located inside the second diaphragm 32 The space is formed by the second air chamber 131 communicating with the third port 113. [

Therefore, when the compressed air is injected through the first port 111, the injected compressed air flows into the first air chamber through the first port 111, and by the pressure of the introduced compressed air, The first diaphragm 31 is pushed outward. In other words, the first air chamber expands outwardly and, conversely, contracts to the first fluid chamber. The main shaft 2 which fixes the center portion of the first diaphragm 31 in a direction in which the first diaphragm 31 is pushed together with the first diaphragm 31 as the first diaphragm 31 is pushed toward the first fluid chamber The central portion of the second diaphragm 32 fixed to the other end of the main shaft 2 is also moved in the moving direction of the main shaft 2. [ By the above movement of the second diaphragm 32, the second air chamber 131 is contracted while the second fluid chamber 132 is expanded.

When the compressed air is injected through the third port 113, the injected compressed air flows into the second air chamber 131 through the third port 113, Unlike the case where compressed air is injected through the first port 111, the second diaphragm 32 is pushed outward as shown in FIG. That is, the second air chamber 131 is inflated and the second fluid chamber 132 is contracted. As the second diaphragm 32 is pushed outwardly, the main shaft 2, to which the central portion of the second diaphragm 32 is fixed, moves in the direction in which the second diaphragm 32 is pushed together with the second diaphragm 32 The central portion of the first diaphragm 31 having the central portion fixed to one end of the main shaft 2 is also moved along with the main shaft 2 in the moving direction of the main shaft 2. [ Therefore, by the above-described operation of the second diaphragm 32, the first air chamber is contracted and the first fluid chamber is expanded at this time.

When the first air chamber is contracted, the compressed air existing in the first air chamber is discharged through the first port 111, and the second air chamber 131 is opened. The compressed air existing in the second air chamber 131 is discharged through the second port 112.

On the other hand, the first fluid discharge valve 123 and the first fluid suction valve 124 are sequentially disposed on the upper and lower portions of the first fluid chamber of the first chamber 12 so as to sequentially communicate with the first fluid chamber, The second fluid discharge valve 133 and the second fluid suction valve 134 are connected to the upper and lower ends of the second fluid chamber 132 of the central chamber 11 in order, Respectively. The valves are in the form of a ball valve, and have a conventional structure capable of preventing backflow.

3, the first fluid inlet valve 124 is closed, and the first fluid outlet valve 123 is closed by the first fluid inlet valve 124. As a result, Is moved to the dotted line position and is opened by the contraction pressure of the first fluid chamber. At this time, as described above, the second fluid chamber 132 is inflated. As the second fluid chamber 132 expands, the second fluid suction valve 134 moves in the direction of the dotted line to open the second fluid chamber 132, The valve 133 is closed. When the second fluid chamber 132 is contracted, as shown in FIG. 8, as opposed to the case where the first fluid chamber is contracted, the first fluid intake valve 124 moves in the direction of the dotted line, The first fluid discharge valve 123 is closed, the second fluid suction valve 134 is closed, and the second fluid discharge valve 133 is opened by moving the ball in the direction of the dotted line.

According to the above-described operation of the valves, when the first fluid chamber is retracted, the fluid already sucked into the first fluid chamber through the first fluid inlet valve 124 is compressed by the contracting pressure of the first fluid chamber, Since the second fluid chamber 132 is in an expanded state at this time, the second fluid chamber 132 is filled with the second fluid suction valve 134 by the vacuum pressure resulting from the expansion. The fluid is sucked through. When the second fluid chamber 132 is contracted, the fluid already sucked into the second fluid chamber 132 due to the contracting pressure is discharged through the first fluid discharge valve 123, and at this time, The fluid is sucked into the first fluid chamber through the first fluid suction valve 124 by the vacuum pressure due to the expansion.

According to the present invention, two different fluids can be conveyed without being mixed with each other through two different lines by the suction and discharge structure of the fluid as described above, and the repetition of the suction and discharge The fluid can be continuously sucked and discharged by the operation.

On the other hand, on the upper part of the housing 1, the discharge pipe 41 is communicated with the first fluid discharge valve 123 of the first chamber 12 and the second fluid discharge valve 133 of the second chamber 13 And a suction pipe 42 is provided at a lower portion of the housing 1 to connect the first fluid inlet valve 124 of the first chamber 12 and the second fluid inlet valve 124 of the first chamber 12, Is detachably provided by a plurality of bolts (15) and nuts (16) so as to communicate with the second fluid intake valve (134) of the chamber (13).

The fluid is sucked into the first fluid chamber or the second fluid chamber 132 via the first fluid intake valve 124 or the second fluid intake valve 134, The fluid sucked into the chamber or the second fluid chamber 132 is discharged through the discharge pipe 41 via the first fluid discharge valve 123 or the second fluid discharge valve 133.

In the discharge pipe 41, when the discharge pipe 41 is in the form of a normal pipe having both open ends, the discharge pipe 41 is discharged through the first fluid discharge valve 123 and the second fluid discharge valve 133 The fluids are mixed with each other in the discharge pipe (41), and the fluid to be mixed is discharged through both outlets of the discharge pipe (41). The discharged fluid can be transferred to predetermined different positions by connecting a hose to both outlets of the discharge pipe (41). Also, even when one outlet of the discharge pipe 41 is closed by, for example, a bolt or the like, the fluid discharged through the first and second fluid discharge valves 123 and 133 is mixed with each other in the discharge pipe 41, The discharged fluid is discharged only through one open outlet.

In the present invention, as shown in FIG. 8, a first opening / closing valve 44 may be provided at the center of the discharge pipe 41. In closing operation of the first opening / closing valve 44, The fluids discharged through the two fluid discharge valves 123 and 133 are discharged through both outlets of the discharge pipe 41 without being mixed with each other. The fluids discharged through the first and second fluid discharge valves 123 and 133 are mixed with each other in the discharge tube 41 so that the fluids discharged from both sides of the discharge tube 41 Outlet or one of the outlets.

When the suction pipe 42 is in the form of a normal pipe with both open at the suction pipe 42, the first fluid suction valve 124 and the second fluid suction valve 134 are connected via a first fluid suction valve 124 and a second fluid suction valve 134, respectively, The fluid sucked into the fluid chamber or the second fluid chamber 132 is sucked into the first fluid chamber and the second fluid chamber 132 while being mixed with each other in the suction pipe 42 before being sucked. A hose may be connected to one or both of the inlets of the suction pipe 42 so that the fluid can be transferred from the fluid storage tank to the suction pipe 42 at a predetermined position. When one of the outlets of the suction pipe 42 is closed by, for example, a bolt or the like, the single-component fluid flows into the suction pipe 42 through one inlet of the suction pipe 42, 1 direction or both directions depending on the shape of the discharge pipe 41 via the first fluid chamber or the second fluid chamber 132. 8, a second open / close valve 45 may be provided at the center of the suction pipe 42. When the second open / close valve 45 is closed, the suction pipe 42 The two different fluids introduced into the suction pipe 42 through both outlets of the first and second fluid chambers 124 and 134 are not mixed with each other and are discharged through the first fluid chamber 124 and the second fluid chamber 124 132). In the opening operation of the second on-off valve 45, two different fluids introduced through both outlets of the suction pipe 42 are mixed with each other in the suction pipe 42, 2 fluid intake valves 124, 134 to the first fluid chamber and the second fluid chamber 132, respectively. The fluid thus sucked is discharged through both outlets of the discharge pipe in a state of being unmixed according to the shape of the discharge pipe, as described above, or discharged through both outlets or one outlet of the discharge pipe in a mixed state.

The air pump according to the present invention can be supported by connecting the legs 7 by bolts 15 and nuts 16 to the front and rear sides of the lower portion of the suction pipe 42 coupled as described above.

A sleeve 118 communicating with the fourth port 114 and the fifth port 115 is provided at an inner position of the center chamber 11 formed with the fourth port 114 and the fifth port 115 And a first spool 5 having a ring groove 51 formed on an outer circumferential surface of a central portion thereof is inserted into the sleeve 118 so as to be movable left and right. Both ends of the first spool 5 installed as described above are placed in the first air chamber of the first chamber 12 and the second air chamber 131 of the second chamber 13, 131) is fixed to one side of the second diaphragm (32). Therefore, the first spool 5 is also moved to the left and right as the main shaft 2 moves left and right. When the compressed air is injected through the fourth port 114 when the first spool 5 is moved toward the first chamber 12, the ring groove 51 of the first spool 5 is injected It is preferable that compressed air is formed at a position where the compressed air can be discharged to the fifth port 115 through the ring groove 51. That is, when the first spool 5 is moved toward the second chamber 13, the fourth port 114 is blocked by the outer circumferential surface of the first spool 5 and the compressed air flows through the fourth port 114, Can not be injected into the eve 118.

4, the first chamber 12 of the first chamber 12 and the second chamber 13 of the first chamber 12 are provided on the front side of the housing 1, that is, the front side of the central chamber 11. [ A switching valve 6 for sequentially switching the injection of the compressed air into the second air chamber 131 is provided.

4 to 7, the switching valve 6 is provided with an air inlet 611 at its front side and an air inlet 611 at its rear side. The first port 111, the second port 112, Port 614 corresponding to the fourth port 114 and the fifth port 115 and the fourth port 614 and the fifth port 615 corresponding to the fourth port 114 and the fifth port 115 are formed A casing (61); A second spool (62) installed in the casing (61) so as to be able to move up and down and the lower end to sequentially open and close the fourth port (114) and the fifth port (115); The first port 631, the second port 632 and the third port 633 are formed to communicate with the first port 111, the second port 112 and the third port 113 A valve seat (63) provided at an opening (613) of the casing (61); The first port 631 and the second port are connected to each other in a state in which the first port 631 and the second port 632 are communicated with each other in accordance with the upward and downward movement of the second spool 62, Port 632 and the third port 633 in a state where the second port 632 and the third port 633 are isolated from each other or in a state where the second port 632 and the third port 633 are communicated with each other, And a valve body (64) provided on the outer peripheral surface of the second spool (62) so as to be isolated from the second spool (62).

The switching valve 6 is supported by coupling the casing 61 to the central chamber 11 by a plurality of bolts 15 and nuts 16.

In addition, an arc-shaped groove 641 is formed in the front surface of the valve body 64. Therefore, when the second spool 62 rises, the arc-shaped groove 641 surrounds the first 'port 631 and the second' port 632 in a state of communicating with each other, The first port 631 and the second port 632 are placed in a state of being isolated from the inside of the casing 61. When the second spool 62 is lowered, the arcuate grooves 641 surround the second 'port 632 and the third' port 633 in a state of communicating with each other, 632 and the third port 633 are placed in a state of being isolated from the inside of the casing 61.

Reference numeral 621 denotes a height adjusting bolt penetrating the lower portion of the casing 61, and is provided to adjust the ascending / descending distance of the second spool 62 according to the left and right rotation.

An air injection nipple 612 connected to an air compressor (not shown) is coupled to the air inlet 611 of the casing 61 so that air can be injected into the casing 61.

According to the configuration of the switching valve 6 as described above, when the second spool 62 is in the lowered position, if compressed air is injected into the casing 61 through the air injection nipple 612, The second port 632 and the third port 633 are separated from the inside of the casing 61 by the first and second ports 631 and 64 so that the compressed air flows through the first port 631 and the first port 111 Into the first air chamber of the first chamber 12, so that the first air chamber starts to expand.

At this time, the fifth port 615 is closed by the lower end of the second spool 62, but the fourth port 614 is opened and is in a state of communicating with the casing 61, Is also introduced into the sleeve 118 of the first chamber 12 through the fourth port 614 and the fourth port 114 and the compressed air introduced into the sleeve 118 flows into the sleeve 118 Port 615 through the fifth port 115 through the ring groove 51 of the inserted first spool 5. The fifth port 615 is connected to the first port 615 through the fifth port 115. [ The pressure of the compressed air to the fifth port 615 acts as a pressure to push up the lower end of the second spool 62 of the switching valve 6 so that the second spool 62 rises upward . The fourth port 114 is closed by the lower end of the second spool 62 as the second spool 62 rises and the compressed air is no longer introduced into the sleeve 118 and the valve body 64 The first port 631 and the second port 632 are kept isolated from the inside of the casing 61 by the arcuate grooves 641 of the third port 633, And the third port 113 to the second air chamber 131 of the second chamber 13. [ The second air chamber 131 starts to be inflated by the inflow of the compressed air into the second air chamber 131, and at the same time, the first air chamber starts to contract. The compressed air in the first air chamber is retracted to the first port 111 and then flows through the first port, the second port, and the second port 112 in order, The compressed air introduced into the chamber 13 and introduced into the second chamber 13 is discharged to the outside through the muffler 117 coupled to the air discharge port 116. [

When the expansion of the second air chamber 131 is completely completed, the compressed air is no longer introduced into the second air chamber 131, so that the inflow pressure of the compressed air is reduced in the second spool The second spool 62 is lowered, and the above process is repeated.

Meanwhile, when the second spool 62 descends, the compressed air present in the second air chamber 131 passes through the third port 113, the third port 633, the second port 632, The compressed air introduced into the second chamber 13 through the port 112 is discharged to the outside through the muffler 117 coupled to the air discharge port 116. [

As described above, when the first air chamber is compressed, the fluid is sucked into the first fluid chamber through the first fluid inlet valve 124 and, at the same time, the fluid is sucked into the second fluid chamber 132 at the same time, When the second air chamber 131 is inflated, the fluid already sucked into the first fluid chamber is discharged through the first fluid discharge valve 123 And fluid is sucked into the second fluid chamber 132 through the second fluid suction valve 134. [

As described above, according to the present invention, the first fluid chamber and the second fluid chamber 132 are moved in accordance with the contraction and expansion movement of the first and second air chambers 131, that is, The fluid is continuously discharged through the first fluid discharge valve 123 and the second fluid discharge valve 133, so that the fluid is uniformly discharged.

Further, since the fluid is discharged by the expansion pressure by the compressed air of the first and second diaphragms 31 and 32, the discharge pressure is high by the Pascal's law.

In addition, since the fluid is conveyed through two lines at the same time, the fluid can be transferred in a large capacity.

The suction pipe 42 communicating with the first and second fluid intake valves 124 and 134 and the discharge pipe 41 communicating with the first and second fluid discharge valves 123 and 133 For example, two kinds of paints having different colors can be mixed and dispensed. Therefore, it is very convenient to dispense the stirring work because the paint of mixed color can be applied to the wall surface of an apartment, for example.

In addition, when the suction pipe 42 and the discharge pipe 41 provided with the first and second open / close valves 44 and 45 at the center portion are applied, the suction and discharge paths of the fluid are selectively made into one or two lines, The different liquids of the branches can be selectively mixed in the state of mixing or not mixing, thereby reducing the number of air pumps used.

In addition, by excluding the use of the electric motor, an accident such as electric leakage or electric shock is prevented.

Claims (4)

A central chamber and a second chamber, a sleeve communicating with the first chamber and the central chamber is provided in a front wall of the central chamber, and a front wall of the center chamber is provided with a first chamber, A second port communicating with the central chamber, a third port communicating with the second chamber, and fourth and fifth ports communicating with the sleeve, the first port communicating with the central chamber, the second port communicating with the central chamber, A first fluid discharge valve and a first fluid suction valve are formed on upper and lower portions of the first chamber and a second fluid discharge valve and a second fluid suction valve are formed on upper and lower portions of the second chamber A housing; A main shaft passing through the central chamber so as to be movable left and right and having both ends thereof in the first chamber and the second chamber; The center portion is fixed at both ends of the main shaft and the edge portion is held by the engagement of the side edge portions of the central chamber with the edge portions of the first chamber and the second chamber to separate the first chamber from the first air chamber and the first fluid chamber And first and second diaphragms partitioning the second chamber into a second air chamber and a second fluid chamber, respectively; A first spool installed to the left and right of the sleeve of the center chamber and having a left end connected to one side of an inner surface of the first diaphragm; In order to switch sequentially the injection of the compressed air into the first air chamber through the first port or the injection of the compressed air into the second air chamber through the third port by interlocking with the first spool, And a switching valve coupled to the front wall. The air conditioner of claim 1, wherein the switching valve has an air inlet formed at a front side thereof and an opening formed at a rear side position corresponding to the positions of the first port, the second port and the third port, A fourth port and a fifth port corresponding to the first port and the second port; A second spool which is installed in the casing so as to be movable up and down, and whose lower ends sequentially open and close the fourth and fifth ports in accordance with the upward and downward movement; A valve seat formed at an opening of the casing, wherein the first port, the second port and the third port communicate with the first port, the second port and the third port; The first port and the second port are communicated with each other and the first port and the second port are isolated from the inside of the casing in accordance with the vertical movement of the second spool, And a valve body provided on an outer peripheral surface of the second spool so as to isolate the second and third ports from the inside of the casing. [3] The apparatus of claim 1 or 2, wherein a fluid discharge pipe communicating with the first fluid discharge valve and the second fluid discharge valve is coupled to the upper portion of the housing, and the first fluid suction valve and the second fluid suction pipe And a fluid suction pipe communicating with the valve is coupled. The fluid transportation air pump according to claim 3, wherein a first opening / closing valve is provided at a center portion of the fluid discharge pipe, and a second opening / closing valve is provided at a center portion of the fluid suction pipe.