阅读说明：本技术 一种隔膜真空泵 (Diaphragm vacuum pump ) 是由 陈宇航 程实 于 2021-08-31 设计创作，主要内容包括：本发明涉及真空泵技术领域,尤其涉及一种隔膜真空泵。一种隔膜真空泵,包括外壳,外壳上设有进料口和出料口,外壳内壁设有驱动机构,外壳内壁设有气动机构,外壳内壁固定连接有第一缸体和第二缸体,第一缸体和第二缸体内均设有隔膜本体,第一缸体和第二缸体与隔膜结合处设有减缓机构,隔膜本体上设有紧固螺栓,隔膜本体上设有第一固定板和第二固定板,第一固定板和第二固定板分别置于隔膜本体的两侧,第一固定板外壁固定连接有第二密封垫,第二固定板外壁固定连接有第一密封垫,第一缸体上设有第一连接管,第二缸体上设有第二连接管；本发明操作简单,节约了能源,同时减少了复杂的结构,降低了装置的故障率,提高了装置的实用性。(The invention relates to the technical field of vacuum pumps, in particular to a diaphragm vacuum pump. A diaphragm vacuum pump comprises a shell, wherein a feed inlet and a discharge outlet are formed in the shell, a driving mechanism is arranged on the inner wall of the shell, a pneumatic mechanism is arranged on the inner wall of the shell, a first cylinder body and a second cylinder body are fixedly connected to the inner wall of the shell, diaphragm bodies are arranged in the first cylinder body and the second cylinder body respectively, a retarding mechanism is arranged at the joint of the first cylinder body and the second cylinder body with a diaphragm, a fastening bolt is arranged on the diaphragm body, a first fixing plate and a second fixing plate are arranged on the diaphragm body and are respectively arranged on two sides of the diaphragm body, a second sealing gasket is fixedly connected to the outer wall of the first fixing plate, a first sealing gasket is fixedly connected to the outer wall of the second fixing plate, a first connecting pipe is arranged on the first cylinder body, and a second connecting pipe is arranged on the second cylinder body; the invention has simple operation, saves energy, reduces complex structures, reduces the failure rate of the device and improves the practicability of the device.)

1. A diaphragm vacuum pump comprising a housing (1), characterized in that: the shell (1) is provided with a feed inlet (101) and a discharge outlet (102), the inner wall of the shell (1) is provided with a driving mechanism, the inner wall of the shell (1) is fixedly connected with a first cylinder body (9) and a second cylinder body (10), the first cylinder body (9) and the second cylinder body (10) are both internally provided with a diaphragm body (11), a first connecting pipe (12) is arranged on the first cylinder body (9), a second connecting pipe (13) is arranged on the second cylinder body (10), a first one-way valve (1201) and a second one-way valve (1202) are arranged on the first connecting pipe (12), a third one-way valve (1301) and a fourth one-way valve (1302) are arranged on the second connecting pipe (13), a first groove (1001) is formed in the joint of the first cylinder body (9) and the second cylinder body (10) and the diaphragm body (11), and a retarding mechanism (14) is arranged in the first groove (1001).

2. A diaphragm vacuum pump according to claim 1, wherein: be equipped with fastening bolt (1105) on diaphragm body (11), be equipped with first fixed plate (1101) and second fixed plate (1102) on diaphragm body (11), the both sides of diaphragm body (11) are arranged respectively in first fixed plate (1101) and second fixed plate (1102), the sealed pad (1104) of first fixed plate (1101) outer wall fixedly connected with second, the sealed pad (1103) of second fixed plate (1102) outer wall fixedly connected with, first sealed pad (1103), second fixed plate (1102), first fixed plate (1101) and the sealed pad (1104) of second pass through fastening bolt (1105) and connect on diaphragm body (11), first connecting pipe (12) and second connecting pipe (13) both ends all are linked together with feed inlet (101) and discharge gate (102).

3. A diaphragm vacuum pump according to claim 1, wherein: actuating mechanism includes motor (2), motor (2) output end fixedly connected with first pivot (3), first pivot (3) outer wall fixedly connected with first band pulley (301), shell (1) inner wall rotates and is connected with second pivot (4), be equipped with first bent axle (401), second band pulley (402) and second bent axle (403) on second pivot (4), first band pulley (301) links to each other through the belt with second band pulley (402).

4. A diaphragm vacuum pump according to claim 1, wherein: pneumatic mechanism includes first piston cylinder (5) and second piston cylinder (7), the equal fixed connection of first piston cylinder (5) and second piston cylinder (7) is at the inner wall of shell (1), be equipped with first through-hole (501) on first piston cylinder (5), first through-hole (501) are linked together with first cylinder body (9), first piston cylinder (5) inner wall fixedly connected with first piston board (6), first piston board (6) outer wall rotation is connected with first piston rod (601), the one end rotation connection of keeping away from first piston board (6) of first piston rod (601) is on first bent axle (401).

5. A diaphragm vacuum pump according to claim 4, wherein: the piston type oil cylinder is characterized in that a second through hole (701) is formed in the second piston cylinder (7), the second through hole (701) is communicated with the second cylinder body (10), a second piston plate (8) is connected to the inner wall of the second piston cylinder (7) in a sliding mode, a second piston rod (801) is connected to the outer wall of the second piston plate (8) in a rotating mode, and one end, far away from the second piston plate (8), of the second piston rod (801) is connected to the second crankshaft (403) in a rotating mode.

6. A diaphragm vacuum pump according to claim 1, wherein: first recess (1001) inner wall top fixedly connected with ball round pin (106), second recess (1002) have been seted up respectively to first recess (1001) inner wall both sides, second recess (1002) inner wall right side fixedly connected with spring (103), spring (103) other end fixedly connected with telescopic link (104), telescopic link (104) and second recess (1002) inner wall sliding connection, the one end fixedly connected with rubber pad (105) of spring (103) are kept away from in telescopic link (104), rubber pad (105) closely laminate in diaphragm body (11) side.

7. A diaphragm vacuum pump according to claim 1, wherein: buffer gear includes fixed block (141), spherical recess (145) have been seted up to fixed block (141) upper surface, spherical recess (145) and ball round pin (106) looks adaptation, third recess (146) and fourth recess (147) have been seted up to fixed block (141) bottom, third recess (146) and fourth recess (147) are run through by logical groove (148), threaded hole (142) are located to lead to groove (148), threaded hole (148) are located fixed block (141) side border position, fourth recess (147) lateral wall rotates and is connected with bull stick (144), fourth recess (147) one end fixedly connected with handle (143) are kept away from in bull stick (144), fifth recess (1441) have been seted up to bull stick (144) surface.

Technical Field

The invention relates to the technical field of vacuum pumps, in particular to a diaphragm vacuum pump.

Background

Diaphragm pumps are essentially embolic pumps, where the fluid to be infused is separated from the plunger and the cylinder by a membrane, thereby protecting the plunger and the cylinder. The left side of the diaphragm, which is in contact with the liquid, is made of corrosion-resistant material or coated with a layer of corrosion-resistant substance, and the right side of the diaphragm is filled with water or oil.

The reciprocating vacuum pump is widely applied at present due to compact structure and strong suction capacity, particularly in the field of vacuum filtration, and is used for pumping gas in a liquid storage bottle and a filter bottle to ensure that filtered liquid smoothly flows down.

In the existing diaphragm vacuum pump, the diaphragm needs to be turned over repeatedly at two sides, so that the diaphragm is easy to damage at the turning part.

Disclosure of Invention

The invention aims to solve the problem that a diaphragm is easy to damage in the prior art, and provides a diaphragm vacuum pump.

In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides a diaphragm vacuum pump, includes the shell, be equipped with feed inlet and discharge gate on the shell, shell inner wall is equipped with actuating mechanism, shell inner wall is equipped with pneumatic mechanism, the first cylinder body of shell inner wall fixedly connected with and second cylinder body, circle in first cylinder body and the second cylinder body are the foreign side, all be equipped with the diaphragm body in first cylinder body and the second cylinder body, be equipped with first connecting pipe on the first cylinder body, be equipped with the second connecting pipe on the second cylinder body, be equipped with first check valve and second check valve on the first connecting pipe, be equipped with third check valve and fourth check valve on the second connecting pipe, first cylinder body and second cylinder body have seted up first recess in the department of combining with the diaphragm body, be equipped with in the first recess and slow down the mechanism.

Preferably, be equipped with fastening bolt on the diaphragm body, be equipped with first fixed plate and second fixed plate on the diaphragm body, the both sides of diaphragm body are arranged respectively in to first fixed plate and second fixed plate, the sealed pad of first fixed plate outer wall fixedly connected with second, the first sealed pad of second fixed plate outer wall fixedly connected with, first sealed pad, second fixed plate, first fixed plate and the sealed pad of second pass through fastening bolt and connect on the diaphragm body, first connecting pipe and second connecting pipe both ends all are linked together with feed inlet and discharge gate.

Preferably, actuating mechanism includes the motor, motor output end fixedly connected with first pivot, first pivot outer wall fixedly connected with first band pulley, the shell inner wall rotates and is connected with the second pivot, be equipped with first bent axle, second band pulley and second bent axle in the second pivot, first band pulley passes through the belt with the second band pulley and links to each other.

Preferably, the pneumatic mechanism comprises a first piston cylinder and a second piston cylinder, the first piston cylinder and the second piston cylinder are fixedly connected to the inner wall of the shell, a first through hole is formed in the first piston cylinder and communicated with the first cylinder body, a first piston plate is fixedly connected to the inner wall of the first piston cylinder, a first piston rod is rotatably connected to the outer wall of the first piston plate, and one end, far away from the first piston plate, of the first piston rod is rotatably connected to a first crankshaft.

Preferably, a second through hole is formed in the second piston cylinder and is communicated with the second cylinder body, a second piston plate is connected to the inner wall of the second piston cylinder in a sliding mode, a second piston rod is connected to the outer wall of the second piston plate in a rotating mode, and one end, far away from the second piston plate, of the second piston rod is connected to the second crankshaft in a rotating mode.

Preferably, first recess inner wall top fixedly connected with ball round pin, the second recess has been seted up respectively to first recess inner wall both sides, second recess inner wall right side fixedly connected with spring, spring other end fixedly connected with telescopic link, telescopic link and second recess inner wall sliding connection, the one end fixedly connected with rubber pad of spring is kept away from to the telescopic link, the rubber pad closely laminates in diaphragm body side.

Preferably, buffer gear includes the fixed block, spherical recess has been seted up to the fixed block upper surface, spherical recess and ball round pin looks adaptation, third recess and fourth recess have been seted up to the fixed block bottom, third recess and fourth recess are run through by leading to the groove, lead to groove department set up threaded hole, the screw hole is located fixed block side border position, fourth recess lateral wall rotates and is connected with the bull stick, fourth recess one end fixedly connected with handle is kept away from to the bull stick, the fifth recess has been seted up on the bull stick surface.

Compared with the prior art, the invention provides a diaphragm vacuum pump, which has the following beneficial effects:

when the diaphragm is installed, a square diaphragm is adopted, one side of the diaphragm passes through a through groove below a fixed block to reach the inside of a fourth groove, the edge of the diaphragm in the fourth groove is inserted into a fifth groove formed in a rotating rod, a handle at one end of the rotating rod is rotated, one side of the diaphragm is wound on the rotating rod, then a screw in a threaded hole is screwed down, so that the diaphragm in the through groove can be clamped tightly by the through groove, the diaphragm is prevented from being separated from the fixed block, other three sides of the diaphragm are also installed in other three fixed blocks, the looseness degree of the diaphragm can be adjusted by rotating the rotating rod, the power of the diaphragm vacuum pump is controlled by controlling the vibration amplitude of the diaphragm, the damage of the diaphragm caused by the left-right movement of the diaphragm can be reduced by a ball hinge structure of the fixed blocks and a cylinder body, a second groove is formed in the bottom wall of the cylinder body, a telescopic rod is arranged in the second groove, and one end, far away from the second groove, of the telescopic rod, is fixedly connected with rubber, through closely laminating rubber and diaphragm body, can keep apart the liquid of diaphragm body one side and the piston cylinder of opposite side, prevent that liquid from entering into the piston cylinder through the first recess on the cylinder body in, influence diaphragm vacuum pump's use.

Drawings

Fig. 1 is a schematic structural diagram of a diaphragm vacuum pump according to the present invention;

FIG. 2 is a schematic structural diagram of a diaphragm vacuum pump according to the present invention;

FIG. 3 is a top view of a diaphragm vacuum pump according to the present invention;

FIG. 4 is a combination view of a diaphragm body and a cylinder body of a diaphragm vacuum pump according to the present invention;

FIG. 5 is a schematic structural view of a diaphragm fixing block in a diaphragm vacuum pump according to the present invention;

fig. 6 is a combination view of a first groove and a fixing block on a cylinder body of a diaphragm vacuum pump according to the present invention.

In the figure: 1. a housing; 101. a feed inlet; 102. a discharge port; 2. a motor; 3. a first rotating shaft; 301. a first pulley; 4. a second rotating shaft; 401. a first crankshaft; 402. a second pulley; 403. a second crankshaft; 5. a first piston cylinder; 501. a first through hole; 6. a first piston plate; 601. a first piston rod; 7. a second piston cylinder; 701. a second through hole; 8. a second piston plate; 801. a second piston rod; 9. a first cylinder; 10. a second cylinder; 1001. a first groove; 1002. a second groove; 103. a spring; 104. a telescopic rod; 105. rubber; 11. a septum body; 1101. a first fixing plate; 1102. a second fixing plate; 1103. a first gasket; 1104. a second gasket; 1105. fastening a bolt; 12. a first connecting pipe; 1201. a first check valve; 1202. a second one-way valve; 13. a second connecting pipe; 1301. a third check valve; 1302. a fourth check valve; 14. a mitigation mechanism; 141. a fixed block; 142. a threaded hole; 143. a handle; 144. a rotating rod; 1441. a fifth groove; 145. a spherical recess; 146. a third groove; 147. a fourth groove; 148. a through groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Referring to fig. 1-6, a diaphragm vacuum pump includes a casing 1, a feed inlet 101 and a discharge port 102 are arranged on the casing 1, a driving mechanism is arranged on the inner wall of the casing 1, a first cylinder 9 and a second cylinder 10 are fixedly connected to the inner wall of the casing 1, diaphragm bodies 11 are arranged in the first cylinder 9 and the second cylinder 10, a first connecting pipe 12 is arranged on the first cylinder 9, a second connecting pipe 13 is arranged on the second cylinder 10, a first check valve 1201 and a second check valve 1202 are arranged on the first connecting pipe 12, a third check valve 1301 and a fourth check valve 1302 are arranged on the second connecting pipe 13, a first groove 1001 is formed at the joint of the first cylinder 9 and the second cylinder 10 and the diaphragm bodies 11, and a retarding mechanism 14 is arranged in the first groove 1001.

Through adopting above-mentioned technical scheme, liquid passes through in the feed inlet 101 gets into the pump, motor 2 drives actuating mechanism operation, actuating mechanism drives the inside piston of first cylinder body 9 and second cylinder body 10 and is reciprocating motion, when the inside second piston plate 8 of second cylinder body 10 upwards moves, air in the cylinder body passes through the second through-hole 701 entering piston cylinder of second piston cylinder 7 below, thereby make the inside diaphragm body 11 of second cylinder body 10 move right, thereby utilize the negative pressure with inside the liquid suction cylinder body in the feed inlet 101, when the second piston plate 8 moves down, diaphragm body 11 in the second cylinder body 10 moves left, extrude the pump with the inside liquid of second cylinder body 10 outside from discharge gate 102.

Specifically, the diaphragm body 11 is provided with fastening bolts 1105, the diaphragm body 11 is provided with a first fixing plate 1101 and a second fixing plate 1102, the first fixing plate 1101 and the second fixing plate 1102 are respectively arranged at two sides of the diaphragm body 11, the outer wall of the first fixing plate 1101 is fixedly connected with a second gasket 1104, the outer wall of the second fixing plate 1102 is fixedly connected with a first gasket 1103, the second fixing plate 1102, the first fixing plate 1101 and the second gasket 1104 are connected to the diaphragm body 11 through the fastening bolts 1105, and two ends of the first connecting pipe 12 and the second connecting pipe 13 are both communicated with the feed inlet 101 and the discharge outlet 102.

Specifically, actuating mechanism includes motor 2, motor 2 output end fixedly connected with first pivot 3, 3 outer wall fixedly connected with first band pulley 301 of first pivot, 1 inner wall of shell rotates and is connected with second pivot 4, be equipped with first bent axle 401, second band pulley 402 and second bent axle 403 on the second pivot 4, first band pulley 301 passes through the belt with second band pulley 402 and links to each other.

By adopting the above technical scheme, the output end of the motor 2 drives the first rotating shaft 3 to rotate, the first rotating shaft 3 drives the first belt pulley 301 to rotate, and the first belt pulley 301 and the second belt pulley 402 are connected through a belt, so that the rotation of the first belt pulley 301 drives the rotation of the second belt pulley 402, and the first crankshaft 401 and the second crankshaft 403 are driven to rotate.

Specifically, pneumatic mechanism includes first piston cylinder 5 and second piston cylinder 7, the equal fixed connection of first piston cylinder 5 and second piston cylinder 7 is at the inner wall of shell 1, be equipped with first through-hole 501 on the first piston cylinder 5, first through-hole 501 is linked together with first cylinder body 9, 5 inner wall fixedly connected with first piston plate 6 of first piston cylinder, 6 outer wall swivelling joints of first piston plate have first piston rod 601, the one end swivelling joint that first piston plate 6 was kept away from to first piston rod 601 is on first bent axle 401.

Through adopting above-mentioned technical scheme, through articulating first piston rod 601 on first bent axle 401, when motor 2 drove first bent axle 401 and rotates, first bent axle 401 drove first piston plate 6 at the end of first piston rod 601 and is reciprocating motion in first piston cylinder 5 to make the gas in the first piston cylinder 5 get into or discharge through first through-hole 501, thereby drive the motion of diaphragm body 11.

Specifically, a second through hole 701 is formed in the second piston cylinder 7, the second through hole 701 is communicated with the second cylinder body 10, a second piston plate 8 is connected to the inner wall of the second piston cylinder 7 in a sliding manner, a second piston rod 801 is connected to the outer wall of the second piston plate 8 in a rotating manner, and one end, far away from the second piston plate 8, of the second piston rod 801 is connected to the second crankshaft 403 in a rotating manner.

By adopting the above technical scheme, the second piston rod 801 is hinged to the first crankshaft 403, and when the motor 2 drives the second crankshaft 403 to rotate, the second crankshaft 403 drives the second piston plate 8 at the end of the second piston rod 801 to reciprocate in the second piston cylinder 7, so that gas in the second piston cylinder 7 enters or is discharged through the second through hole 701, and the diaphragm body 11 is driven to move.

Specifically, first recess 1001 inner wall top fixedly connected with ball round pin 106, second recess 1002 has been seted up respectively to first recess 1001 inner wall both sides, second recess 1002 inner wall right side fixedly connected with spring 103, spring 103 other end fixedly connected with telescopic link 104, telescopic link 104 and second recess 1002 inner wall sliding connection, spring 103's one end fixedly connected with rubber pad 105 is kept away from to telescopic link 104, rubber pad 105 closely laminates in diaphragm body 11 side.

Through adopting above-mentioned technical scheme, it is articulated with second cylinder 10 through ball round pin 106 and fixed block 141 for fixed block 141 can be free rock, just be equipped with rubber pad 105 in it through seting up second recess 1002 in second cylinder 10, rubber pad 105 and diaphragm body 11 in close contact with can prevent that the left liquid of diaphragm body 11 from getting into inside first recess 1001, thereby get into inside the piston cylinder, influence the operation of diaphragm vacuum pump, through being equipped with spring 103 in second recess 1002 is inside, can guarantee that rubber pad 105 can be with diaphragm body 11 in close contact with all the time when diaphragm body 11 moves.

Specifically, the buffer mechanism includes a fixed block 141, a spherical groove 145 is formed in the upper surface of the fixed block 141, the spherical groove 145 is adapted to the ball pin 106, a third groove 146 and a fourth groove 147 are formed in the bottom of the fixed block 141, the third groove 146 and the fourth groove 147 are penetrated by a through groove 148, a threaded hole 142 is formed in the through groove 148, the threaded hole 142 is located at the edge of the side surface of the fixed block 141, a rotating rod 144 is rotatably connected to the side wall of the fourth groove 147, one end of the rotating rod 144, which is far away from the fourth groove 147, is fixedly connected with a handle 143, and a fifth groove 1441 is formed in the surface of the rotating rod 144.

By adopting the technical scheme, when the diaphragm 11 is installed, a square diaphragm is adopted, one side of the diaphragm 11 passes through the through groove 148 below the fixed block 141 and reaches the inside of the fourth groove 147, the edge of the diaphragm 11 in the fourth groove 147 is inserted into the fifth groove 1441 formed in the rotating rod 144, the handle 143 at one end of the rotating rod 144 is rotated, one side of the diaphragm 11 is wound on the rotating rod 144, and then the screw in the screw groove 142 is screwed down, so that the diaphragm 11 in the through groove 148 can be clamped by the through groove 148, the diaphragm 11 is prevented from being separated from the fixed block 141, other three sides of the diaphragm 11 are also installed in other three fixed blocks 141, the loosening degree of the diaphragm 11 can be adjusted by rotating the rotating rod 144, and the power of the diaphragm vacuum pump can be controlled by controlling the vibration amplitude of the diaphragm 11.

The use method and the working principle are as follows: in the invention, when a user uses the device, firstly, the motor 2 is started, the motor 2 drives the first belt pulley 301 on the first rotating shaft 3 to rotate, the first belt pulley 301 drives the second belt pulley 402 to rotate through a belt, the second belt pulley 402 drives the first crank shaft 401 and the second crank shaft 403 to rotate, the first crank shaft 401 and the second crank shaft 403 drive the first piston rod 601 and the second piston rod 801 to move up and down when rotating, the second piston plate 8 moves down in the second piston cylinder 7 when the first piston plate 6 moves up in the first piston cylinder 5, the first piston plate 6 moves up to draw the gas in the first cylinder 9 into the first piston cylinder 5, meanwhile, the first check valve 1201 on the first connecting pipe 12 is opened, the second check valve 1202 closes the oil to be drawn into the first cylinder 9 from the first connecting pipe 12, and when the second piston plate 8 moves down, the air in the second piston cylinder 7 is squeezed into the second cylinder 10, meanwhile, the third check valve 1301 on the second connecting pipe 13 is closed, the fourth check valve 1302 is opened, the diaphragm body 11 extrudes oil liquid in the second cylinder body 10 into the discharge hole 102, uninterrupted conveying is completed, when the diaphragm 11 is installed, a square diaphragm is adopted, one side of the diaphragm 11 penetrates through the through groove 148 below the fixed block 141 to reach the inside of the fourth groove 147, the edge of the diaphragm 11 in the fourth groove 147 is inserted into the fifth groove 1441 formed in the rotating rod 144, the handle 143 at one end of the rotating rod 144 is rotated, one side of the diaphragm 11 is wound on the rotating rod 144, then the screw in the threaded groove 142 is tightened, so that the diaphragm 11 in the through groove 148 can be clamped by the through groove 148, the diaphragm 11 is prevented from being separated from the fixed block 141, the other three sides of the diaphragm 11 are also installed in the other three fixed blocks 141, the loosening degree of the diaphragm 11 can be adjusted by rotating the rotating rod 144, and the power of the diaphragm vacuum pump is controlled by controlling the vibration amplitude of the diaphragm 11, through the ball hinge structure of fixed block 141 and cylinder body 10, can slow down the damage of diaphragm 11 side-to-side movement to diaphragm 11, through having seted up second recess 1002 at the 10 diapire of cylinder body, be equipped with telescopic link 104 in the second recess 1002, the one end fixedly connected with rubber 105 of second recess 1002 is kept away from to telescopic link 104, through closely laminating rubber 105 and diaphragm body 11, can keep apart the liquid of diaphragm body 11 one side and the piston cylinder of opposite side, prevents that liquid from entering into the piston cylinder through first recess 1001 on the cylinder body 10 in, influences diaphragm vacuum pump's use.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.