WO2018174463A1

WO2018174463A1 - Twin circle positive displacement pump having check valve

Info

Publication number: WO2018174463A1
Application number: PCT/KR2018/003008
Authority: WO
Inventors: 최병철
Original assignee: 최병철
Priority date: 2017-03-24
Filing date: 2018-03-14
Publication date: 2018-09-27
Also published as: KR101748419B1

Abstract

The present invention relates to a twin circle positive displacement pump having a check valve, comprising: a housing having an upper chamber and a lower chamber which are vertically communicated with each other and having a fluid inlet and a fluid outlet formed on both sides thereof; rotary shafts including an upper rotary shaft and a lower rotary shaft which rotate in opposite directions in the upper and lower chambers respectively; eccentric rotors including an upper eccentric rotor and a lower eccentric rotor in which the upper rotary shaft and the lower rotary shaft are eccentrically inserted and rotated, respectively; cylindrical members including an upper cylindrical member and a lower cylindrical member, which accommodate the upper eccentric rotor and the lower eccentric rotor, respectively, and contacting and moving in the upper and lower chambers, respectively, and a diaphragm for connecting the upper cylindrical member and the lower cylindrical member and interlocking the same with each other; and bearings provided between the upper cylindrical member and the upper eccentric rotor and between the lower cylindrical member and the lower eccentric rotor, wherein the fluid inlet is provided with a first check valve which is opened when the inside of the housing is in a negative pressure and is shut off when the inside of the housing in a positive pressure, so as to prevent a fluid from flowing backward along a clearance formed between the upper cylindrical member and the upper chamber or between the lower cylindrical member and the lower chamber.

Description

Dual-circuit volume pump with check valve

The present invention relates to a dual member volumetric pump, and more particularly, to a dual member volumetric pump in which a fluid is pumped by a volume change caused by an upper rotor and a lower rotor which are inwardly rotated in opposite directions in an upper volume chamber and a lower volume chamber. It is about.

A pump is a mechanism for transporting a liquid or gaseous fluid through a tube through a pressure action, or pumping a fluid in a low pressure vessel into a high pressure vessel through the tube.

When the pump is classified structurally, it can be classified into a reciprocating pump, a rotary (rotary) pump, a centrifugal pump, an axial pump, a friction pump, and the like.

Among these pumps, the rotary pump is configured to perform a piston action by a rotor (rotator) while the piston acting part of the pump rotates, and can be used for various purposes. In particular, it is widely used as an automatic control hydraulic pump. .

There are various rotary pumps according to the structure, and Patent Documents 1 to 3 are technologies related to twin or tandem rotary pumps.

In order to examine the problems of the conventional tandem rotary pump, it will be described with reference to Figs. FIG. 1 is a cross-sectional view of a conventional rotary pump, and FIG. 2 is an operating state diagram illustrating a reverse flow of a fluid according to one rotation of an upper and lower eccentric rotor in the rotary pump shown in FIG. 1.

In general, the rotary pump has a housing 100 having upper and lower symmetrical chambers 100a and lower volume chambers 100b and fluid inlets (i) and outlets (o), which are symmetrical and communicate with each other, as shown in FIG. The upper rotor Ru accommodated in the upper chamber and eccentrically rotated, and the lower rotor Rd accommodated in the lower chamber and rotated opposite to the upper rotor. At this time, the upper rotor and the lower rotor are symmetric with each other and the structure is the same.

Here, the upper rotor Ru includes an upper cylindrical member 400a which is inscribed in the upper chamber, and an upper eccentric rotor 300a rotatably installed in the upper cylindrical member. In addition, the lower rotor Rd includes a lower cylindrical member 400b which is inscribed in the lower chamber and a lower eccentric rotor 300b rotatably installed in the lower cylindrical member.

However, the upper cylindrical member constituting the upper rotor and the lower cylindrical member constituting the lower rotor are connected to each other by the diaphragm 400c, and the upper rotor and the lower rotor may be inscribed in opposite directions.

At this time, the inside of the upper and lower volume chamber is circular, and the outer and inner circumferential surface of the upper and lower cylindrical members are also circular. The outer circumference of the upper and lower eccentric rotors is also circular.

On the other hand, the upper and lower eccentric rotor is inserted and fixed to the rotating shaft (200a, 200b) for transmitting the rotational power in the outer part. That is, the rotation shafts are inserted in an eccentric state to one side instead of the center of the upper and lower eccentric rotors, and are coupled to each other using an axial coupling element such as a key.

In this structure, the cylindrical bearing 500 is inserted and interposed between the eccentric rotor and each cylindrical member to reduce the friction generated between each other. The bearings generally use rolling means using balls or rolling members.

Figure 2 (a) is an initial state, a cross-sectional view showing a state in which the rotation axis is aligned with the diaphragm, Figure 2 (b) is the upper rotation axis rotates 90 degrees clockwise, the lower rotation axis 90 counterclockwise Fig. 2 (c) is a cross sectional view showing a state in which the upper rotating shaft is rotated 180 degrees in the clockwise direction and the bottom rotating shaft is rotated 180 degrees in the counterclockwise direction, and Fig. 2 (d) is a cross sectional view showing the rotating state in the upper rotating shaft. It is sectional drawing which shows the state which rotated 270 degree clockwise and the lower rotating shaft 270 degree counterclockwise.

From the initial state as shown in (a), the upper eccentric rotor rotates clockwise and the lower eccentric rotor rotates counterclockwise. For this reason, the upper rotor (upper cylindrical member) rotates clockwise in an inscribed state along the inner circumferential surface of the upper chamber and pushes the fluid flowing into the inlet to the outlet, and the lower rotor (lower cylindrical member) is the lower chamber. It is a principle to push the fluid flowing into the inlet while rotating counterclockwise in an inscribed state along the inner circumferential surface of the same to the outlet.

In other words, when the upper rotor reaches the 3 o'clock direction, the upper rotor pushes out the fluid and discharges it to the outlet, and the space decreases at the opposite 9 o'clock direction, and the pressure decreases to become a negative pressure (-) state. Inflow. And while the lower rotor reaches the 9 o'clock direction, the fluid is transported to the outlet side, and the space is formed at the 9 o'clock direction, and the fluid is also introduced from the inlet while the negative pressure state.

(c) When the upper rotor reaches 6 o'clock, all the fluid at 3 o'clock is discharged and filled with the newly introduced fluid. The lower rotor also reaches the 6 o'clock and 3 o'clock. Continually pushes the fluid out of the outlet and at the same time fresh fluid flows in at 9 o'clock.

In the state as shown in (d), the upper rotor pushes the newly introduced fluid to the 3 o'clock position, and the lower rotor pushes out all the fluid in the 3 o'clock direction.

After returning to the initial state as shown in (a), the upper rotor pushes and discharges the fluid at 3 o'clock, and a negative pressure is formed at 9 o'clock, and new fluid is introduced. The lower rotor discharges all the fluid at 3 o'clock. It is filled with freshly introduced fluid.

As this cycle is repeated, pumping occurs quickly.

However, since the upper rotor and the lower rotor are in contact with the inner circumferential surfaces of the upper chamber and the lower chamber, the inward circular motion does not cause a loss of pressure, so that the pumping of the fluid is performed smoothly, but in the case of (a) or (c) Pressure leakage occurs.

That is, in the case of (c), since the upper clearance occurs between the lower surface of the upper rotor and the inner circumferential surface of the upper chamber, the fluid between the lower rotor and the lower chamber should be discharged through the outlet, but a part of the upper clearance of the outlet side ( Suo) flows back into the upper chamber through the problem occurs. And due to the inlet side upper clearance (Sui) there is a problem that the pressure in the lower volume chamber is increased to prevent the inflow of fluid from the inlet smoothly.

In addition, in the case of (a), since the lower clearance occurs between the upper surface of the lower rotor and the inner circumferential surface of the lower chamber, the fluid between the upper rotor and the upper chamber should be discharged through the outlet, but a part of the lower clearance of the outlet side (Sdo Inflow into the lower volume chamber occurs through). In addition, the pressure in the upper chamber is increased due to the inlet side lower clearance Sdi, so that the inflow of fluid from the inlet does not occur smoothly.

Accordingly, the present invention is to solve the above-described problems, the object of the present invention is to prevent pressure leakage and backflow due to the clearance generated between the inner circumferential surface of the upper chamber and the upper cylindrical member or between the inner circumferential surface and the lower cylindrical member of the lower chamber. It is to provide a two-way volumetric pump having a check valve that can be prevented.

Ssangyuan volume pump having a check valve according to the present invention for achieving the above object, the upper volume chamber and the lower volume chamber which is communicated with the upper and lower, the inlet and outlet of the fluid is formed on both sides; A rotating shaft including an upper rotating shaft and a lower rotating shaft respectively rotating in opposite directions in the upper chamber and the lower chamber; An eccentric rotor including an upper eccentric rotor and a lower eccentric rotor each of which the upper and lower rotary shafts are eccentrically inserted and rotated; The upper cylindrical member and the lower cylindrical member and the upper cylindrical member and the lower cylindrical member to receive the upper eccentric rotor and the lower eccentric rotor, respectively, and inwardly move in the interior of the upper chamber and the lower chamber, respectively. A cylindrical member including a diaphragm to interlock with each other; A bearing provided between the upper cylindrical member and the upper eccentric rotor and between the lower cylindrical member and the lower eccentric rotor, wherein the inlet port is opened when the inside of the housing is under negative pressure and the positive pressure; It is characterized in that the first check valve is cut off, it is possible to prevent the back flow of the fluid along the clearance formed between the upper cylindrical member and the upper volume chamber or between the lower cylindrical member and the lower volume chamber.

According to another embodiment of the present invention, the housing is provided with the upper volume chamber and the lower volume chamber communicated up and down, the inlet and outlet of the fluid is formed on both sides; A rotating shaft including an upper rotating shaft and a lower rotating shaft respectively rotating in opposite directions in the upper chamber and the lower chamber; An eccentric rotor including an upper eccentric rotor and a lower eccentric rotor each of which the upper and lower rotary shafts are eccentrically inserted and rotated; The upper cylindrical member and the lower cylindrical member and the upper cylindrical member and the lower cylindrical member to receive the upper eccentric rotor and the lower eccentric rotor, respectively, and inwardly move in the interior of the upper chamber and the lower chamber, respectively. A cylindrical member including a diaphragm to interlock with each other; And a bearing provided between the upper cylindrical member and the upper eccentric rotor and between the lower cylindrical member and the lower eccentric rotor. The second check valve is cut off, it is characterized in that it is possible to prevent the back flow of the fluid along the clearance formed between the upper cylindrical member and the upper volume chamber or between the lower cylindrical member and the lower volume chamber.

According to another embodiment of the present invention, the upper and lower chambers are communicated with the upper and lower chambers, the housing formed with the inlet and outlet of the fluid on both sides; A rotating shaft including an upper rotating shaft and a lower rotating shaft respectively rotating in opposite directions in the upper chamber and the lower chamber; An eccentric rotor including an upper eccentric rotor and a lower eccentric rotor each of which the upper and lower rotary shafts are eccentrically inserted and rotated; The upper cylindrical member and the lower cylindrical member and the upper cylindrical member and the lower cylindrical member to receive the upper eccentric rotor and the lower eccentric rotor, respectively, and inwardly move in the interior of the upper chamber and the lower chamber, respectively. A cylindrical member including a diaphragm to interlock with each other; A bearing provided between the upper cylindrical member and the upper eccentric rotor and between the lower cylindrical member and the lower eccentric rotor, wherein the inlet port is opened when the inside of the housing is under negative pressure and the positive pressure; A first check valve is provided that is cut off, and the outlet port is provided with a second check valve that is opened when the inside of the housing is at a constant pressure and shuts off at a negative pressure, between the upper cylindrical member and the upper volume chamber or between the lower cylindrical member and the lower cylinder. It is characterized in that it is possible to prevent the back flow of the fluid along the play formed between the volume chambers.

At this time, the inlet is made of a first installation portion which is a space in which the first check valve is installed, and the first venturi tube portion of the shape in which the first installation portion and the inside of the housing communicate with each other and the cross-sectional area is reduced, the first check The valve may include a first fixing plate fixed to an inlet side of the first venturi tube part and having a plurality of suction holes through which fluid may pass, a first support shaft penetrating and inserted into a center of the first fixing plate, and the first fixing plate. A first opening and closing plate coupled to an end of the support shaft and surrounding the outer periphery of the first support shaft and a first spring interposed between the first opening and closing plate to elastically support the first opening and closing plate for opening and closing the inlet side of the first installation unit. It may include.

The outlet port may include a second venturi pipe portion communicating with the inside of the housing and having a larger cross-sectional area, and a second installation portion communicating with the second venturi tube portion and a space in which the second check valve is installed. A second fixing plate fixed to the outlet side of the second mounting part and having a plurality of discharge holes through which fluid can pass, a second support shaft penetrating and inserted into a center of the second fixing plate, and an end of the second support shaft And a second spring coupled to and interposed between the second opening and closing plate and the second fixing plate while surrounding the outer circumference of the second support shaft to open and close the outlet side of the first venturi tube part. Can be.

According to the present invention having the above configuration, by installing a check valve on the inlet side or the outlet side is generated due to the upper clearance between the upper cylindrical member and the inner peripheral surface of the upper chamber, or the lower clearance between the lower cylindrical member and the inner peripheral surface of the lower chamber. It can prevent the pressure leakage and backflow phenomenon can be made smooth pumping.

1 is a cross-sectional view of a conventional rotary pump

Figure 2 is an operating state diagram showing the back flow of the fluid according to one rotation of the upper, lower eccentric rotor in the conventional rotary pump shown in FIG.

Figure 3 is a cross-sectional view showing a dual-way volumetric pump with a check valve according to an embodiment of the present invention

4 is an operating state diagram showing a state in which the upper eccentric rotor is rotated 90 degrees

5 is an operating state diagram showing a state in which the upper eccentric rotor rotated 180 degrees

6 is an operating state diagram showing a state in which the upper eccentric rotor is rotated 270 degrees

7 is an operating state diagram showing a state in which the upper eccentric rotor rotated 360 degrees (initial state)

Hereinafter, with reference to the accompanying drawings an embodiment of a dual-circuit volume pump according to the present invention will be described in more detail.

For reference, the description with reference to the drawings is for easier understanding of the present invention, and the scope of the present invention is not limited thereto. In the following description of the present invention, when it is determined that the detailed description of the related known technology may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted.

Figure 3 is a cross-sectional view showing a dual-circuit volume pump with a check valve according to an embodiment of the present invention.

Referring to FIG. 1, an embodiment of the present invention includes a housing 10, a rotation shaft 20, an eccentric rotor 30, a cylindrical member 40, and a bearing 50. In order to solve the backflow of the fluid that occurred in the process, install the first check valve on the inlet side of the fluid, the second check valve on the outlet side of the fluid, or install the first check valve on the inlet port, It is technical feature to install two-check valve.

First, the housing 10 has an upper volume chamber 10a capable of accommodating the upper cylindrical member 40a on the upper side, and a lower volume chamber 10b capable of accommodating the lower cylindrical member 40b on the lower side thereof. The upper volume chamber 10a and the lower volume chamber 10b communicate with each other.

In addition, the upper volume chamber 10a and the lower volume chamber 10b are formed in the same shape, and the housing 10 may have a vertical symmetry overall.

In addition, both sides of the housing 10 are formed with an inlet 11 through which the fluid is sucked in and an outlet 12 through which the fluid is discharged.

At this time, the structure of the inlet may be divided into a first installation portion (11a) and the first venturi tube portion (11b) as shown.

The first installation portion 11a is a space in which the first check valve 60, which will be described later, may be installed. The first installation portion 11a may be formed in a cylindrical shape on one wall of the housing 10, and a suction pipe for sucking a fluid to be pumped (not shown) Can be connected to

The first venturi tube part 11b may communicate with the first installation part 11a and the inside of the housing, and may have a venturi tube shape whose cross-sectional area gradually decreases based on the inflow direction of the fluid.

On the other hand, the structure of the outlet 12 may be divided into a second installation portion 12a and the second venturi tube portion 12b as shown.

The second venturi tube part 12b is in direct communication with the inside of the housing 10 to discharge the fluid. The second venturi tube part 12b may have a venturi tube shape in which a cross-sectional area is gradually increased based on the discharge direction of the fluid.

In addition, the second installation part 12a is a space in which the second check valve 70 to be described later is installed. The second installation part 12a is formed in a cylindrical shape on the other wall of the housing 10 to communicate with the second venturi part 12b. It may be connected to the discharge tube (not shown) for discharging the fluid to be pumped.

Next, in the upper volume chamber 10a and the lower volume chamber 10b, the upper rotating shaft 20a and the lower rotating shaft 20b are horizontally disposed, respectively, and rotate in opposite directions.

At this time, the rotating shaft 20 is rotated by the external power and coupled with the upper eccentric rotor 30a and the lower eccentric rotor 30b, respectively, to rotate each eccentric rotor 30 in the opposite direction.

Next, the eccentric rotor 30 is composed of an upper eccentric rotor 30a coupled to the upper rotary shaft 20a and a lower eccentric rotor 30b coupled to the lower rotary shaft 20b.

The eccentric rotor 30 and the rotating shaft 20 may be coupled to each other by a key-groove coupling method, but is not limited thereto and may be fastened to each other by various shaft coupling methods.

Here, when the rotation shaft 20 is inserted into each of the eccentric rotor 30, it is not inserted into the center of the eccentric rotor 30 is inserted to be eccentric to one side. Therefore, when the rotating shaft 20 is rotated, the eccentric rotor 30 is to be eccentrically rotated like a cam (cam).

Next, the cylindrical member 40 will be described.

The cylindrical member 40 accommodates the upper eccentric rotor 30a and the upper cylindrical member 40a accommodated in the upper volume chamber 10a, and the lower eccentric rotor 30b and the lower volume. It may include a lower cylinder member 40b accommodated in the seal 10b and a diaphragm 40c for connecting the upper cylindrical member 40a and the lower cylindrical member 40b to interlock with each other.

In this case, each of the upper cylindrical member 40a and the lower cylindrical member 40b may have a circular cross section of an inner circumferential surface thereof.

As the eccentric rotor 30 rotates, the upper cylindrical member 40a is formed inside the upper volume chamber 10a, and the lower cylindrical member 40b is respectively inside the lower volume chamber 10b. It rotates in contact with it.

On the other hand, a bearing 50 may be interposed between the upper cylindrical member and the upper eccentric rotor and between the lower cylindrical member and the lower eccentric rotor to reduce friction. The bearing may use a ball, a roller, or the like as rolling means, or may use a flexible bearing.

Next, a first check valve and a second check valve, which are technical features of the present invention, will be described.

First, the first check valve 60 opens the fluid sucked into the inlet 11 of the housing 10 only in the suction direction. That is, the inside of the housing 10 is opened when the pressure is lowered to become a negative pressure (-) state to inhale fluid, while the pressure inside the housing 10 is increased to become a positive pressure (+) state due to the backflow phenomenon. Is shut off to prevent backflow of the fluid.

Specifically, the first check valve 60 is installed in the first mounting portion 11a, the first fixing plate 61, the first support shaft 62, the first opening and closing plate 63, the first spring ( 64).

The first fixing plate 61 fixes the first support shaft 62 and the first opening / closing plate 63 so that the first fixing plate 61 is fixed inside the first mounting portion 11a, in detail, the first mounting portion 11a. And the first venturi tube portion 11b is installed at the point where the connection is made. To this end, a first seating jaw 65 on which the first fixing plate 61 may be seated may be formed in a stepped shape inside the outlet of the first installation part 11a. In addition, a hole may be formed in the center of the first fixing plate 61 to allow the first support shaft 62 to pass therethrough, and a plurality of suction holes 61a through which fluid may pass may be formed around the hole. .

The first support shaft 62 is a rod that penetrates and is inserted into the center of the first fixing plate 61 and is inserted into the first fixing plate 61 so as to be movable.

The first opening and closing plate 63 is coupled to an end of the first support shaft 62. The first opening / closing plate 63 has a circular disk shape that can open and close the first mounting portion 11a. The first opening / closing plate 63 is located at the inlet side of the first mounting portion 11a, and sucks or blocks the fluid.

Therefore, a first catching jaw 66 may be formed at the inlet side of the first installation part 11a to protrude inward and to catch the first opening and closing plate 63. In addition, a sealing member (not shown) may be provided at the first catching jaw 66 or the first opening / closing plate 63 to prevent leakage of the fluid.

In addition, a first spring 64 is interposed between the first opening and closing plate 63 and the first fixing plate 61. The first spring 64 is installed while surrounding the outer circumference of the first support shaft 62 so that both ends elastically support the first opening and closing plate 63 and the first fixing plate 61. 63) is always closed. At this time, the first spring 64 has an appropriate modulus of elasticity, and when the inside of the housing 10 becomes negative pressure (-), the first opening and closing plate 63 is opened so that the fluid can be easily introduced. .

On the other hand, the outlet 12 may be provided with a second check valve (70).

The second check valve 70 is opened when the inside of the housing 10 is positive pressure (+) and shut off when negative pressure (-), and is opened only when the fluid is discharged to the outlet 12. That is, when the inside of the housing 10 is increased in pressure to become a positive pressure (+) state, it is opened to discharge fluid, while the pressure inside the housing 10 is lowered due to backflow, so that the pressure is close to a negative pressure (-) state. Is blocked.

Specifically, the second check valve 70 is installed in the second installation portion 12a, the second fixing plate 71, the second support shaft 72, the second opening and closing plate 73, the second spring ( 74).

The second fixing plate 71 fixes the second support shaft 72 and the second opening / closing plate 73 so that the second fixing plate 71 is fixed inside the second mounting portion 12a, in detail, of the second mounting portion 12a. It is installed on the exit side. To this end, a second seating jaw 75 may be formed to protrude from the inside of the outlet of the second installation part 12a on which the second fixing plate 71 may be seated. In addition, a hole may be formed in the center of the second fixing plate 71 to allow the second support shaft 72 to pass therethrough, and a plurality of discharge holes 71a through which fluid may pass may be formed around the hole. .

The second support shaft 72 is a rod penetrating and inserted into the center of the second fixing plate 71 and is inserted into the second fixing plate 71 so as to be movable.

The second opening and closing plate 73 is coupled to an end of the second support shaft 72. The second opening and closing plate 73 is a circular disk-shaped configuration that can open and close the second venturi tube portion 12b, located at the inlet side of the second mounting portion 12a, to discharge or block the fluid. .

Accordingly, the second latching jaw 76 may be formed at the inlet side of the second installation part 12a in a stepped shape so that the second opening / closing plate 73 is caught. In addition, the second catching jaw 76 or the second opening and closing plate 73 may be provided with a sealing member (not shown) to prevent leakage of the fluid.

In addition, a second spring 74 is interposed between the second opening and closing plate 73 and the second fixing plate 71. The second spring 74 is installed while surrounding the outer circumference of the second support shaft 72 so that both ends elastically support the second opening and closing plate 73 and the second fixing plate 71. 73) is always closed. At this time, the second spring 74 has an appropriate modulus of elasticity so that the second opening and closing plate 73 is opened while being compressed when the inside of the housing 10 is in a positive pressure (+) state so that the fluid can be easily discharged. .

Hereinafter, the operation of the present invention will be described in detail with reference to FIGS. 4, 5, 6, and 7. 4 is an operating state showing the state where the upper eccentric rotor is rotated 90 degrees, Figure 5 is an operating state diagram showing a state in which the upper eccentric rotor rotated 180 degrees, Figure 6 is a state in which the upper eccentric rotor rotated 270 degrees 7 is an operating state diagram showing a state in which the upper eccentric rotor is rotated 360 degrees (initial state). In the drawing, light gray means a negative pressure state, and dark gray means a positive pressure state. However, the description will be made based on the embodiment in which both the first check valve and the second check valve are installed, which includes a description of the case where the first check valve is installed only at the inlet or the second check valve is installed only at the outlet.

As described in the general operation process in the background technology of the present invention, the upper eccentric rotor 30a and the lower eccentric rotor 30b rotate in opposite directions.

4 illustrates a state in which the upper eccentric rotor 30a is rotated 90 degrees clockwise and the lower eccentric rotor 30b is rotated 90 degrees counterclockwise. That is, the upper cylindrical member 40a is located at 3 o'clock, and the lower cylindrical member 40b is located at 9 o'clock.

In this state, since the space of the upper volume chamber 10a and the lower volume chamber 10b on the inlet 11 side increases, a negative pressure (-) is formed, and a large amount of fluid is sucked in, and the upper volume of the outlet 12 side on the opposite side is increased. As the space of the chamber 10a and the lower volume chamber 10b decreases, a positive pressure (+) is formed, and the fluid filled in the lower volume chamber 10b is discharged through the outlet 12.

At this time, the first check valve 60 and the second check valve 70 are kept open. That is, the first spring 64 and the second spring 74 are compressed to open the first opening and closing plate 63 and the second opening and closing plate 73 to smoothly suck and discharge the fluid.

5 shows a state in which the upper eccentric rotor 30a is rotated 180 degrees clockwise and the lower eccentric rotor 30b is rotated 180 degrees counterclockwise. That is, both the upper cylindrical member 40a and the lower cylindrical member 40b are located at the 6 o'clock direction.

At this time, the first check valve 60 and the second check valve 70 are maintained in a blocked state. That is, the first spring 64 and the second spring 74 are expanded so that the first opening and closing plate 63 and the second opening and closing plate 73 are closed to stop the suction and discharge of the fluid.

Because the upper clearance occurs between the lower surface of the upper cylindrical member 40a and the inner circumferential surface of the upper volume chamber 10a, the fluid between the lower cylindrical member 40b and the lower volume chamber 10b flows out of the outlet 12. All of them must be discharged through the inlet flows back through the outlet side upper clearance (Suo) to the upper volume chamber (10a). As a result, the pressure of the outlet 12 is lowered and thus the second check valve 70 is closed because the pressure cannot be maintained at the positive pressure (+).

In addition, due to the fluid flowing back into the upper chamber 10a, the pressure in the upper chamber 10a becomes high, so that the negative pressure (-) cannot be maintained. In addition, due to the inlet side upper clearance Sui, some of the fluid in the upper volume chamber 10a is also flowed back to the lower volume chamber 10b so that the pressure in the lower volume chamber 10b is also increased, thereby increasing the pressure of the inlet 11 as a whole. The first check valve 60 is also closed.

Therefore, the pressure of the inlet 11 is not increased any more, so that the reverse flow is stopped at the outlet side upper play (Suo), so that the conventional problems are solved.

6 shows a state in which the upper eccentric rotor 30a rotates 270 degrees clockwise and the lower eccentric rotor 30b rotates 270 degrees counterclockwise. That is, the upper cylindrical member 40a is located at 9 o'clock, and the lower cylindrical member 40b is located at 3 o'clock.

In this state, since the space of the lower volume chamber 10b and the upper volume chamber 10a on the inlet 11 side increases, a negative pressure (-) is formed, and a large amount of fluid is sucked in, and the upper volume on the outlet 12 side on the opposite side is increased. As the space of the chamber 10a and the lower volume chamber 10b decreases, a positive pressure (+) is formed so that the fluid filled in the upper volume chamber 10a is discharged through the outlet 12.

At this time, the first check valve 60 and the second check valve 70 are kept open.

That is, the first spring 64 and the second spring 74 are compressed to open the first opening and closing plate 63 and the second opening and closing plate 73 to smoothly suck and discharge the fluid.

7 shows a state in which the upper eccentric rotor 30a rotates 360 degrees clockwise and the lower eccentric rotor 30b rotates 360 degrees counterclockwise, that is, an initial state. That is, both the upper cylindrical member 40a and the lower cylindrical member 40b are positioned at 12 o'clock.

Because the lower clearance occurs between the upper surface of the lower cylindrical member (40b) and the inner circumferential surface of the lower volume chamber (10b), the fluid between the upper cylindrical member (40a) and the upper volume chamber (10a) is the outlet 12 All of them must be discharged through the inlet flows back into the lower volume chamber (10b) through the outlet side lower clearance (Sdo). As a result, the pressure of the outlet 12 is lowered and thus the second check valve 70 is closed because the pressure cannot be maintained at the positive pressure (+).

In addition, due to the fluid flowing back into the lower volume chamber 10b, the pressure in the lower volume chamber 10b becomes high, so that the negative pressure (-) cannot be maintained. In addition, a portion of the fluid in the lower volume chamber 10b flows back into the upper volume chamber 10a due to the inlet side lower clearance Sdi, so that the pressure in the upper volume chamber 10a is also increased, thereby increasing the pressure of the inlet 11 as a whole. The first check valve 60 is also closed.

Therefore, the pressure of the inlet 11 is not increased any more, so that the reverse flow is stopped at the outlet side lower clearance Sdo, so that the conventional problems are solved and the pumping efficiency can be improved.

Although described above with reference to the drawings according to an embodiment of the present invention, those of ordinary skill in the art will be able to perform various applications and modifications within the scope of the present invention based on the above contents.

Claims

A housing having an upper volume chamber and a lower volume chamber communicating vertically with each other, the inlet and outlet of the fluid being formed at both sides thereof; A rotating shaft including an upper rotating shaft and a lower rotating shaft respectively rotating in opposite directions in the upper chamber and the lower chamber; An eccentric rotor including an upper eccentric rotor and a lower eccentric rotor each of which the upper and lower rotary shafts are eccentrically inserted and rotated; The upper cylindrical member and the lower cylindrical member and the upper cylindrical member and the lower cylindrical member to receive the upper eccentric rotor and the lower eccentric rotor, respectively, and inwardly move in the interior of the upper chamber and the lower chamber, respectively. A cylindrical member including a diaphragm to interlock with each other; In the dual-circuit volume pump comprising: a bearing provided between the upper cylindrical member and the upper eccentric rotor and between the lower cylindrical member and the lower eccentric rotor,

The inlet is provided with a first check valve which is opened when the inside of the housing is negative pressure and shut off when the positive pressure,

And a check valve capable of preventing a backflow of a fluid along a clearance formed between the upper cylindrical member and the upper volume chamber or between the lower cylindrical member and the lower volume chamber.
A housing having an upper volume chamber and a lower volume chamber communicating vertically with each other, the inlet and outlet of the fluid being formed at both sides thereof; A rotating shaft including an upper rotating shaft and a lower rotating shaft respectively rotating in opposite directions in the upper chamber and the lower chamber; An eccentric rotor including an upper eccentric rotor and a lower eccentric rotor each of which the upper and lower rotary shafts are eccentrically inserted and rotated; The upper cylindrical member and the lower cylindrical member and the upper cylindrical member and the lower cylindrical member to receive the upper eccentric rotor and the lower eccentric rotor, respectively, and inwardly move in the interior of the upper chamber and the lower chamber, respectively. A cylindrical member including a diaphragm to interlock with each other; In the dual-circuit volume pump comprising: a bearing provided between the upper cylindrical member and the upper eccentric rotor and between the lower cylindrical member and the lower eccentric rotor,

The outlet port is provided with a second check valve that is opened when the inside of the housing at a constant pressure and shut off at a negative pressure,

And a check valve capable of preventing a backflow of a fluid along a clearance formed between the upper cylindrical member and the upper volume chamber or between the lower cylindrical member and the lower volume chamber.
A housing having an upper volume chamber and a lower volume chamber communicating vertically with each other, the inlet and outlet of the fluid being formed at both sides thereof; A rotating shaft including an upper rotating shaft and a lower rotating shaft respectively rotating in opposite directions in the upper chamber and the lower chamber; An eccentric rotor including an upper eccentric rotor and a lower eccentric rotor each of which the upper and lower rotary shafts are eccentrically inserted and rotated; The upper cylindrical member and the lower cylindrical member and the upper cylindrical member and the lower cylindrical member to receive the upper eccentric rotor and the lower eccentric rotor, respectively, and inwardly move in the interior of the upper chamber and the lower chamber, respectively. A cylindrical member including a diaphragm to interlock with each other; In the dual-circuit volume pump comprising: a bearing provided between the upper cylindrical member and the upper eccentric rotor and between the lower cylindrical member and the lower eccentric rotor,

The inlet is provided with a first check valve that is opened when the inside of the housing is negative pressure and shut off when the positive pressure, the outlet is provided with a second check valve that is opened when the inside of the housing is positive pressure and shut off when the negative pressure,

And a check valve capable of preventing a backflow of a fluid along a clearance formed between the upper cylindrical member and the upper volume chamber or between the lower cylindrical member and the lower volume chamber.
The method according to any one of claims 1 to 3,

The inlet is composed of a first installation portion which is a space in which the first check valve is installed, and a first vent pipe portion having a shape in which the first installation portion communicates with the inside of the housing and the cross-sectional area is reduced.

The first check valve,

A first fixing plate fixed to an inlet side of the first venturi tube part and having a plurality of suction holes through which fluid can pass, a first support shaft penetrating and inserted into a center of the first fixing plate, and an end of the first support shaft It is coupled to the first opening and closing plate for opening and closing the inlet side of the first installation portion and comprises a first spring interposed between the first opening and closing plate and the first fixing plate while surrounding the outer periphery of the first support shaft A two-way volumetric pump having a check valve, characterized in that.
The method according to any one of claims 1 to 3,

The outlet port is composed of a second venturi tube portion communicating with the inside of the housing and the cross-sectional area is large, and a second installation portion which is a space in communication with the second venturi tube portion and the second check valve is installed,

The second check valve,

A second fixing plate fixed to the outlet side of the second mounting part and having a plurality of discharge holes through which fluid can pass, a second support shaft penetrating and inserted into a center of the second fixing plate, and an end of the second support shaft And a second spring coupled to and interposed between the second opening and closing plate and the second fixing plate while surrounding the outer circumference of the second support shaft, the second opening and closing plate opening and closing the outlet side of the first venturi tube part. A two-way volumetric pump having a check valve, characterized in that.