KR101672761B1 - Precision injection pump - Google Patents

Abstract

The present invention relates to a pump to precisely control an amount of target liquid injected in a product manufacturing process. The present invention is able to increase a precision by minimizing a variation in discharge by an O-ring movement as a movement ring of sealing the cylinder and plunger of the precise injection pump is formed in a double structure (sealing and O-ring). The present invention enables the movement ring to have excellent durability by reducing friction between a plunger and a sealing and eliminates eccentricity between the plunger and a cylinder. The present invention enables precise control without a variation in discharge by preventing a target liquid from growing to a huge bubble by immediately discharging fine bubble generated in an intake and a discharge process.

Description

Precision infusion pump {omitted}

The present invention relates to a pump for precisely controlling the amount of liquid to be injected in a product production process.

Precision injection pump is a precision instrument aiming at control of discharge volume of ± 0.1ml (± 0.5%) of repetition accuracy based on discharge volume of 20ml per time. It is used in the process of manufacturing secondary battery used in notebooks, mobile phones, It is widely used in cosmetics, pharmaceuticals, foods, and the like, as well as being used to precisely control the amount of electrolyte solution injected. In order to precisely inject the amount of solution in such a production process, the presently used product is a syringe type pump controlled by a precision servomotor, and the processing precision and assembly precision of each part is very high and therefore the price is also very high.

On the other hand, an O-ring having a good resilience is usually used to maintain airtightness in a cylinder in a syringe-type pump. Such conventional O-rings have a large friction between plungers. As a result, when the plunger retracts, the O-ring retracts slightly in the direction in which the plunger moves, and when the plunger advances, the O-ring also advances. Since the position of the O-ring is changed every time the direction of movement of the plunger changes, the amount of discharge varies in proportion to the volume of movement of the O-ring, which is not negligible. Therefore, without solving this problem, Can not be satisfied.

In addition, severe friction between the plunger shortens the life of the O-ring. Since the conventional pump needs to replace the O-ring every month due to the wear of the O-ring, the down time of the mass production equipment is long and frequent, There is a fatal problem entering.

Due to the nature of the syringe-type pump, the linear relationship between the plunger and the cylinder - precisely between the plunger and the O-ring - must be kept constant, while the straightness of the linear motion must be high. When eccentricity is generated between the plunger and the cylinder, it also imposes an unbalanced pressure on the O-ring, thereby promoting wear, and there is a problem that leakage occurs early in the worn portion.

Finally, a liquid such as an electrolyte always contains a small amount of air. When the pump sucks the target liquid, the pressure inside the cylinder is inevitably lowered. When the target liquid is introduced into the low-pressure space, Air is precipitated. Air is not completely melted into the target liquid again in a short period of time even if it is pressurized again. If the pump is operated repeatedly for a long time, the minute bubbles generated inside the cylinder are coupled with each other to grow into relatively large bubbles, There is a problem that the repetition accuracy of the recording medium is seriously degraded.

Korean Registered Patent No. 10-0763591 (2007.10.04)

The problems to be solved in the present invention are as follows.

The motion ring for sealing the cylinder and the plunger of the precision injection pump is made up of double (sealing and O-ring), thereby minimizing the variation of the discharge amount due to the O-ring movement and thereby improving the precision. We also want to reduce the friction between the plunger and the seal, and eliminate the eccentricity between the plunger and the cylinder to increase the durability of the motion ring. Finally, the microbubbles generated during the process of sucking and discharging the target liquid are immediately discharged to prevent the growth of the microbubbles.

In order to solve the above problems,

A cylinder head (100) having an injection port (110) and a discharge port (120); A cylinder body 200 in which a plunger 320 reciprocates; And a plunger part 300 for reciprocating the plunger 320. The cylinder head 100 has a discharge port 120 formed at its upper part and the plunger part 300 is connected to the cylinder body 200 A seal flange 310 which supports the reciprocating motion of the plunger 320 and seals the cylinder body 200 and the plunger 320 and a screw rod 331 rotated by the servomotor 334 A ball screw 330 for reciprocating the plunger 320 and an LM module 340 for guiding the linear motion of the plunger 320 by the LM rail 342. The cylinder body 200, The cylinder head 100 is formed such that the inner wall 121 of the discharge portion extending from the upper inner wall 211 of the cylinder body to the discharge port 120 is formed in a cone shape So that the discharge port 120 rises to the top.

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The present invention has the following effects.

Precision can be achieved by minimizing the variation of the discharge amount due to the O-ring movement because the motion ring for sealing the cylinder and the plunger of the precision injection pump is made up of double (sealing and O-ring). It also has the advantage of reducing the friction between the plunger and the seal, eliminating the eccentricity between the plunger and the cylinder, and thus the durability of the motion ring. Finally, the minute bubbles generated in the process of sucking and discharging the target liquid are immediately discharged to prevent the growth of large bubbles, thereby making it possible to control more precisely due to no deviation in the discharge amount.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view of a precision injection pump according to an embodiment of the present invention. Fig.
2 is an assembly view (a) and an exploded view (b) of the present invention.
Fig. 3 is an exploded view of the cylinder body in Fig. 2 (a). Fig.
4 is an enlarged cross-sectional view of a cylinder head and a cylinder body.
Fig. 5 is a view showing a state in which bubbles in a cylinder are introduced and discharged during the injection and discharge processes in the conventional pump (a) and the pump (b) of the present invention.
Fig. 6 is an exploded view of the seal flange, the o-ring, and the seal, and the coupling and connection views. Fig.
FIG. 7 is a view showing a conventional method (a, b) in which a variation in discharge amount occurs according to a plunger movement, and a method (c, d) in which the sealing method is used.
8 is a view showing a process of replacing the sealing in the pump using the method of FIG. 7 (c, d).
9 is a view showing the plunger portion in a plurality of views around an eccentric adjustment block in which an adjustment bolt hole is formed;
10 is a view showing directions of freedom of a plunger and an eccentric adjustment block;
11 is a view of a seal flange in which an adjusting bolt hole is formed;
12 is an exploded view of an eccentric adjustment block;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, the scope of the present invention should be understood from the description of the claims. Further, the description of known technology which obscures the gist of the present invention is omitted.

1 and 2, the precision infusion pump of the present invention includes a cylinder head 100, a cylinder body 200, and a plunger portion 300.

The cylinder head 100 is a cylinder front end portion having an injection port 110 and a discharge port 120. The cylinder body 200 is a cylinder rear end portion in which the plunger 320 reciprocates. The cylinder head 100 and the cylinder body 200 are coupled to each other to form an internal space 201 and the plunger 320 reciprocates in the internal space 201. The cylinder head 100 and the cylinder body 200 may be structurally separated for ease of assembly, but in some cases, the cylinder head 100 and the cylinder body 200 may be integrally formed with a cylinder. In the former case, it is preferable that an O-ring 10 is provided at a portion where the cylinder head 100 and the cylinder body 200 are coupled.

It is preferable that the discharge port 120 is formed on the upper part of the cylinder head 100 and the injection port 110 is formed on the lower part of the cylinder head 100. This is a structure for preventing the large bubbles 6 from being generated by immediately removing the fine bubbles 5 flowing into the injection port 110. This will be described in more detail as follows.

5 (a) is a diagram comparing the state in which the intracavitary minute bubbles 5 are introduced and discharged during the injection and discharge processes of the conventional pump. 5 (a), the conventional pump has a cylindrical shape having a diameter slightly larger than that of the plunger 320. In this case, the fine bubbles 5 flowing in the injection port 110 float, It is not immediately discharged to the discharge port 120 and stays there when it is caught by the inner wall 121 or reaches the upper inner wall 211 of the cylinder. When the micro bubbles 5 are collected in the reciprocating motion of the plunger 320, the large bubbles 6 are formed. When the micro bubbles 5 are discharged to the discharge port 120, a large error occurs in the discharge amount.

However, in the pump of the present invention, as shown in FIG. 5 (b), the microbubbles 5 in the cylinder are discharged to the discharge port 120 immediately after the inflow of the microbubbles in the cylinder during the injection and discharge processes. This is due to the following structure.

Referring to FIG. 4, the upper inner wall 211 of the cylinder body 200 is formed to be inclined upward toward the cylinder head 100. The discharge inner wall 121 of the cylinder head 100 extending from the upper inner wall 211 of the cylinder body 200 to the discharge port 120 is formed as an inclined cone. As a result, the discharge port 120 has a relatively raised structure. This structure prevents the fine bubbles 5 rising by buoyancy from being immediately discharged to the discharge port 120 without staying in the cylinder inner space 201, thereby preventing the large air bladder 6 from being generated.

The lower inner wall 212 of the cylinder body 200 is further inclined downwardly toward the cylinder head 100 and the cylinder head 200 extends from the lower inner wall 212 of the cylinder body 200 to the injection port 110 The inner wall 111 of the injection unit 100 of the injection unit 100 is inclined in the form of an inverted cone so that the injection hole 110 is recessed relatively downward so that the inner space 201 can have a diamond shape as a whole have.

However, when the plunger is vertically moved (moved upward or downward at the time of injection), the cylinder head is disposed at the upper portion and the cylinder body is disposed at the lower portion And the axis thereof is perpendicular to the paper surface. In this case, it is preferable that the discharge port is located at the uppermost end of the cylinder internal space when viewed in the gravity direction. Therefore, even when the cylinder and the plunger are installed vertically, the inner fine bubbles are floated by buoyancy and discharged to the uppermost discharge port.

Meanwhile, an LM rail groove 220 corresponding to the LM rail 342 may be formed on the bottom surface of the cylinder body 200. In other words, longitudinally long rail grooves in the axial direction of the plunger 320 are formed on the bottom surface of the cylinder body 200 so as to correspond to the LM rail 342. This is a structure for providing a guide for guiding the central axis of the cylinder and the motion direction of the plunger to be parallel to each other, and will be described later in detail.

The plunger 300 is a part that reciprocates the plunger 320 and includes a seal flange 310, a plunger 320, a ball screw 330, and an LM module 340.

The seal flange 310 is coupled to the cylinder body 200 to support the reciprocating movement of the plunger 320 and seal the cylinder body 200 and the plunger 320. 6, a motion ring receiving portion 312 for receiving a motion ring is formed on the inner circumferential surface of the seal flange 310. The motion ring 312a is formed by a combination of the seal flange 310 and the plunger 320 It is preferable that the seal ring 11 and the O-ring 10 are combined to form a double ring. More specifically, a seal 11 corresponding to the diameter of the plunger 320 is formed, and an O-ring 10 having a larger diameter than the seal 11 is coupled to the outer circumferential surface of the seal 11, A cross-sectional view can be seen in Figs.

When the moving ring is formed by the double ring, the O-ring 10 is elastically deformed by the up-down compressive force. EPDM or the like is suitable. The sealing ring 11 is made of a harder material and less frictional, Etc. are suitable. The reason why the sealing 11 is made of a material having a higher hardness is to reduce the wear of the plunger 320 when reciprocating, thereby improving the durability.

On the other hand, another reason why the moving ring is composed of the double ring is to narrow the error range of the discharge amount. This will be described with reference to Fig.

7 (a) and 7 (b), the plunger 320 is moved backward as shown in FIG. 7 (a) in the conventional method in which the discharge amount varies according to the plunger movement, When sucked into the cylinder, the cylinder internal space 201 is in a low pressure state, and the O-ring is pushed against the fluid pressure and brought into close contact with the front end of the O-ring receiving portion. 7 (b), when the plunger 320 advances to discharge the target liquid 4 to the outside of the cylinder, the cylinder internal space 201 becomes a high pressure state, and the O- Is brought into close contact with the rear end of the portion. Since the O-ring is a material having good elasticity, the frictional force is very high. Therefore, when the plunger 320 reciprocates, the shape of the O-ring is deformed and moves (rolls) , The design specification (1.5 times the O-ring diameter) is presented so that the o-ring accommodating portion is formed to have a somewhat larger width than the O-ring diameter in order to secure the movement space of the O-ring. That is, when the O-ring is in close contact with the receiving part without sufficient space, the O-ring is not deformed in shape so that the plunger 320 and the O-ring are not attracted, It is. However, this design specification unintentionally discharges the target liquid 4 introduced into 'A' of FIG. 7 (b) while returning to the state of FIG. 7 (a) when the plunger 320 moves backward, , Which can produce very large errors in pumps requiring high precision to inject quantities.

7 (c) and 7 (d), a double ring including a sealing ring is used. In this case, the contact surface of the sealing ring 11, which is made of a hard and less frictional material, It is possible to seal the inner space 201 and the outside of the cylinder when the plunger 320 moves left and right (refer to FIG. 7) without deforming the seal ring 11. Also, the O-ring 10 on the outer periphery of the sealing ring 11 compresses up and down (refer to FIG. 7) and provides elastic force in the up and down directions, so that the sealing ring 11 closely contacts the plunger 320. Even if the motion ring receiving portion 312 is designed so as to be in close contact with the motion ring without an internal clearance space, in other words, the O-ring accommodating portion space which is 1.5 times the O-ring diameter of the existing design specification is reduced to 1.05 to 1.2 times the O- So that the plunger 320 can stably reciprocate. Therefore, it is possible to prevent the same error as the 'A' portion of FIG. 7 (b).

Meanwhile, it is preferable that the seal flange 310 and the cylinder body 200 are structurally separated objects, and the coupling portion is provided with an O-ring 10 for sealing. Therefore, the seal flange 310 is additionally formed with the stationary ring receiving portion 311 to receive the O-ring 10 serving as the stationary ring. When the seal flange 310 and the cylinder body 200 are separated from each other, it is easy to reassemble the cylinder body 200 so that there is no eccentricity between the plunger and the O-ring. This is because the conventional method without seal flange (integrated with the cylinder body) determines the eccentricity between the cylinder and the plunger by the mechanical assembly precision of the cylinder and plunger, The eccentricity is inevitable.

7 (c) and (d), a moving ring is provided inside the cylinder body 200. When the sealing ring 11 is worn and needs to be replaced, a pump as shown in FIG. 8 has to be used. That is, one end of the sealing ring 11 is bent and inserted into the cylinder body 200, and then the cylinder is mounted by being bent in a circular shape with the bent sealing ring 11 positioned at the portion where the O-ring 10 is accommodated. It is a work requiring high concentration and delicacy to bend while mounting the contact surface of the thin sealing ring 11 so that the diameter of the body 200 is as small as about 20 mm.

In order to solve the above problems, the present invention proposes a method of separately mounting the seal flange 310 on the cylinder body 200. That is, in order to replace the worn seal 11 by the movement of the plunger 320, the cylinder body 200 is separated from the plunger 300 as shown in FIG. 3, and the cylinder body 200 is coupled to the rear end of the cylinder body 200 The screw of the seal flange 310 is disassembled to separate only the seal flange 310. 6, the seal 11 accommodated in the motion ring receiving portion 312 of the seal flange 310 is separated and mounted with a new seal 11 (the contact surface also facing the center portion at this time) The flange 310 is reassembled to the cylinder body 200, and the replacement work of the sealing ring 11 is completed. This method can be achieved by designing the bolt hole of the seal flange 310 with the adjustment bolt hole 21, which will be described later in detail.

The ball screw 330 reciprocates the plunger 320 by a screw rod 331 rotated by a servo motor 334 and is a known technique and therefore will not be described in detail.

The LM module 340 guides the linear motion of the plunger 320 by the LM rail 342. The LM module 340 includes an eccentric adjustment block 341 through which the screw rod 331 passes, And a known LM (Linear Motion) module can be borrowed in addition to some of the known and later-described characteristic configurations, and a detailed description thereof will be omitted.

The characteristic configuration of the eccentric adjustment block 341 includes an LM block 341a, a left and right eccentric adjustment portion 341b, a vertical eccentricity adjustment portion 341c, a screw rod coupling portion 341d, a plunger coupling portion 341e ).

9, 10, and 12, the direction of the LM rail 342 is referred to as an x-axis, the vertical direction as a z-axis, and the direction perpendicular to the x-axis and the z-axis as a y-axis.

The LM block 341a has a groove corresponding to the LM rail 342 and moves along the LM rail 342 in the x-axis direction. 9, when the LM rail 342 is composed of two rails, it is preferable that the LM block 341a also has two LM blocks.

The left and right eccentricity adjusting portions 341b are formed of left and right clearance generating plates (b-xy) parallel to the XY plane and upper and lower holding plates (b-xz) parallel to the XZ plane. The left and right clearance generating plates b-xy are coupled to the upper surface of the LM block 341a and the upper and lower holding plates b-xz are coupled to the upper surfaces of the left and right clearance generating plates b-xy. Preferably, two upper and lower support plates (b-xz) may be formed on both sides of the upper surface of the left and right clearance generation plates (b-xy).

The upper and lower eccentricity adjusting portions 341c are formed of a shaft support plate c-yz parallel to the YZ plane and a vertical gap generating plate c-xz parallel to the XZ plane. The upper and lower clearance generating plates c-xz are coupled to the upper and lower holding plates b-xz in a size corresponding to the upper and lower holding plates b-xz. When two upper and lower holding plates b-xz are formed as shown in FIG. 12 It is preferable that the two upper and lower clearance generation plates (c-xz) are respectively coupled to the outer side of the upper and lower support plates (b-xz). The shaft supporting plate (c-yz) is engaged with the upper and lower clearance generating plate (c-xz), and the screw rod connecting portion 341d penetrates through the center. When two upper and lower clearance generating plates (c-xz) are formed as shown in FIG. 12, both side surfaces of the shaft supporting plate (c-yz) can be combined with the front end surface of the upper and lower clearance generating plates (c-xz). At the center of the shaft support plate (c-yz), a screw rod coupling portion 341d to be screwed with the screw rod 331 is formed to pass through.

The screw rod engaging portion 341d is a portion that is screwed to the screw rod 331 and the rotational force generated when the screw rod 331 is rotated by the servo motor 334 is transmitted through the screw rod engaging portion 341d The eccentric adjustment block 341 is linearly moved.

The plunger engaging portion 341e is a portion for fixing the plunger 320 to the front surface of the shaft supporting plate c-yz. Therefore, when the eccentric adjustment block 341 linearly moves, the plunger 320 also moves integrally and linearly.

The LM rail 342 of the conventional LM module is formed only in a section in which the eccentric adjustment block 341 moves along the screw rod 331 but the LM rail 342 of the present invention is formed so that the eccentric adjustment block 341 moves Not only the flange portion 300 which is a section of the LM rail groove 220 but also the flange portion 300 to the cylinder body 200 so as to be coupled to the LM rail groove 220. As the LM rail 342 is extended, the base 343 supporting it also extends. This is a structure for ensuring the straightness of the plunger movement by eliminating the eccentricity between the cylinder and the plunger. It relates to fastening the screw by the adjusting bolt hole 21 in the assembly process of the precision injection pump, ) Will be explained first, and the principle of eliminating the eccentricity in the assembly process of the precision injection pump will be described.

The bolt holes 20 described below are formed to correspond to the diameter of the screw body and are generally bolt holes to which the screws are coupled. The adjustment bolt holes 21 are 1.1 to 1.5 times larger than the diameter of the bolt holes 20, A smaller hole than a head, which means that the screw head is not engaged with the screw body, but the screw head can not penetrate.

12, a plurality of bolt holes 20 are formed in a portion where the seal flange 310 is coupled to the cylinder body 200 and a plurality of adjustment bolt holes 21 corresponding to the bolt holes 20 are formed in the seal flange 310, . It is preferable that the plunger 320 is formed by drawing at least three or more circles around the hole through which the plunger 320 penetrates.

A plurality of bolt holes 20 are formed on the upper surface of the LM block 341a and adjustment bolt holes 21 are formed in positions corresponding to the bolt holes 20 of the LM block. Are formed. The upper surface of the LM block 341a and the lower surfaces of the left and right clearance generation plates (b-xy) are tangent to each other by the bolt hole (20) and the adjustment bolt hole (21). 12, when two LM blocks 341a are formed by providing two LM rails 342, two bolt holes 20 are formed on the upper surface of each LM block 341a in the x-axis direction, And four adjustment bolt holes 21 passing through the LM block 341a may be formed to have a rectangular shape. 9 (b) and 10 (b), screws are respectively inserted into the bolt holes 20 through the adjustment bolt holes 21. When the diameter of the adjustment bolt holes 21 is larger than that of the screw bodies Therefore, the left and right eccentricity adjusting portions 341b are spaced apart from each other in a state where the four screws are loosely coupled. That is, as shown in FIG. 10 (b), a linear clearance may occur in a direction of a straight line moving in the y-axis, and a rotation clearance may occur in a direction of a rotational movement in the xz plane.

A plurality of bolt holes 20 are formed in the upper and lower base plates b-xz and a plurality of adjustment bolt holes 21 are formed in positions corresponding to the bolt holes 20 of the upper and lower base plates, . The outer surface of the upper and lower holding plates b-xz and the inner surfaces of the upper and lower spacing plates c-xz are in contact with each other while being in contact with each other by the bolt holes 20 and the adjusting bolt holes 21. The two upper and lower base plates b-xz are formed on both sides of the upper surface of the left and right clearance generation plates b-xy, respectively, as shown in Fig. The inner surfaces of the two upper and lower clearance generation plates (c-xz) will be engaged while contacting the outer surfaces of the upper and lower support plates (b-xz). When four bolt holes 20 are formed in a rectangular shape on the outer surfaces of the upper and lower base plates b-xz as shown in FIG. 12, corresponding adjustment bolt holes (c-xz) 21) can be formed. 9 (c) and FIG. 10 (a), screws are respectively inserted into the bolt holes 20 through the adjustment bolt holes 21. When the diameter of the adjustment bolt holes 21 is larger than that of the screw bodies Therefore, in the state where the four screws are loosely coupled, a clearance is generated in the vertical eccentricity adjustment unit 341c. That is, as shown in FIG. 10 (a), a linear clearance may occur in the Lz direction that linearly moves in the z axis, and a rotation clearance may occur in the Rz direction that rotates in the xy plane.

In summary, the degrees of freedom of the eccentric adjustment block 341 and the plunger 320 can be secured in the directions of Ly and Lz displaced on the yz plane by the adjustment bolt holes 21 and in the directions Ry and Rz rotating about the x axis . The degree of freedom of the seal flange 310 can also be ensured on the yz plane by the adjustment bolt hole 21.

A method of eliminating eccentricity in the assembly process of a precision injection pump based on the above-described structure is as follows.

the left and right eccentric adjustment portions 341b are coupled to the LM block 341a coupled to the s1 - LM rail 342. [ At this time, the screw penetrating through the adjustment bolt hole 21 and fastened to the bolt hole 20 is loosely fastened.

the upper and lower eccentricity adjusting portions 341c are coupled to the left and right eccentric adjusting portions 341b coupled to the s2 - LM block 341a. At this time, the screw penetrating through the adjustment bolt hole 21 and fastened to the bolt hole 20 is loosely fastened. Thereafter, the plunger 320, the plunger engaging portion 341e, and the screw rod engaging portion 341d are coupled to each other, which may be coupled in advance before this step.

The degrees of freedom of the plunger 320 and the eccentric adjustment block 341 are secured in the Lz, Lx, Rz, and Ry directions by the adjustment bolt holes 21 in the steps s1 and s2.

s3 - tightly tighten the screw fastened to the adjustment bolt hole (21) in a state where the center of the plunger (320) is aligned so that eccentricity does not occur, and then the hardener is fully inserted to fix it. This eliminates the degree of freedom of the eccentric adjustment block 341 in a state where the plunger 320 keeps a straight line.

s4-The seal flange 310 and the cylinder body 200 are sequentially assembled to the fixed plunger 320 as shown in FIG. 11 (a), and the seal flange 310 and the cylinder body 200 are passed through the adjustment bolt hole 21 of the seal flange 310 Loosen the screws in the bolt holes (20). This ensures the degree of freedom of the seal flange 310 in the direction of Ly and Lz.

s5 -The screw fastened to the adjustment bolt hole 21 is tightened in a state where the cylinder body 200, the seal flange 310 and the plunger 320 are stably installed while keeping a straight line, . Thus, the degree of freedom of the seal flange 310 is also removed in a state in which the seal flange 310 is aligned with the cylinder body 200 and the plunger 320.

This process is equally applied to the process of reassembling the seal flange 310 when the worn seal 11 is replaced. That is, the cylinders, the plunger 320 and the sealing rings 11 of the seal flange 310 must be assembled so as to maintain a concentric state to prevent wear due to unbalanced coupling of the sealing ring 11 and ensure accuracy of the pump.

On the other hand, when the seal flange 310 is reassembled, the plunger 320 must be completely retracted from the seal flange 310 by retracting the plunger 320 to the maximum extent (-X direction in FIG. 9) The plunger 320 can be designed so that the end of the plunger 320 is retracted (-x direction) more than the seal flange 310 when the plunger 320 is fully retracted. In this case, however, the plunger 320 should not be retracted more than the seal flange 310 at all times (when pumping), not when the seal flange 310 is replaced, and even when the plunger 320 is completely retracted The end of the plunger 320 must be positioned in front of the seal flange 310 (+ x direction) and over the seal flange 310. Therefore, a retreat prevention stopper 341f (not shown) is additionally provided at all times to adjust the retreat interval of the plunger 320. [

The retreat prevention stopper 341f may be formed of a 'D' shaped member having a certain thickness D '. That is, at all times (at the time of pumping), the plunger 320 is attached to the ball screw 330 through the open portion of the 'C' so that the plunger 320 is retreated only by the section LD which is smaller than the original retraction section L, So that the end of the lancer 320 is engaged with the seal flange 310. When the seal flange 310 is replaced, the retreat prevention stopper 341f is removed and the plunger 320 is retracted by the original retreat section L so that the end of the plunger 320 is completely separated from the seal flange 310 .

The position of the retreat prevention stopper 341f may be between the screw rod engaging portion 341d and the vertical eccentricity adjusting portion 341c or between the screw rod engaging portion 341d and the servo motor 334. [ When the retreat prevention stopper 341f is engaged at all times, the screw rod engaging portion 341d and the screw rod engaging portion 341d (or 341d and 341d) are positioned between the screw rod engaging portion 341d and the upper and lower eccentric adjusting portions 341c. The bolt connecting the stopper 341f is longer than the thickness D of the retreat prevention stopper 341f so that the bolt head is engaged with the screw rod engaging portion 341d, The end of the bolt will be coupled to the second end 341c. When the seal flange 310 is replaced, the bolt for engaging the screw rod engaging portion 341d and the upper and lower eccentricity adjusting portion 341c is fully tightened while the retreat prevention stopper 341f is removed to secure the original retreat section L I can do it.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be clear to those who have knowledge.

10: O ring
11: Sealing
20: Bolt hole
21: Adjusting bolt hole
100: Cylinder head
101: interior space
110: inlet
111: Injection part inner wall
120:
121: inner wall of the discharge portion
200: cylinder body
201: interior space
211: upper inner wall
212: Lower inner wall
220: LM rail groove
300: Plunger portion
310: Seal flange
311:
312:
320: Plunger
330: Ball Screw
331: Screw rods
332: Support unit
333: Coupling
334: Servo motor
340: LM module
341: Eccentric adjustment block
341a: LM block
341b:
b-xy: Left and right clearance occurrence plate
b-xz: upper and lower fingerboard
341c: upper and lower eccentricity adjusting portion
c-xz: Upper and lower clearance occurrence plate
c-yz: Axial support plate
341d: screw rod connecting portion
341e: Plunger coupling portion
341f: Retraction stopper
342: LM rail
343: Base
4: Target liquid
5: Fine bubbles
6: air bag

Claims (12)

A cylinder head (100) having an injection port (110) and a discharge port (120);
A cylinder body 200 in which a plunger 320 reciprocates;
And a plunger (300) reciprocating the plunger (320)

The cylinder head (100)
A discharge port 120 is formed at an upper portion,

The plunger portion 300
A seal flange 310 coupled to the cylinder body 200 to support the reciprocating motion of the plunger 320 and to seal the cylinder body 200 and the plunger 320,
A ball screw 330 for reciprocating the plunger 320 by a screw rod 331 rotated by a servo motor 334,
And an LM module 340 that induces linear motion of the plunger 320 by the LM rail 342,

The cylinder body (200)
The upper inner wall 211 is inclined upward toward the cylinder head 100,
The cylinder head (100)
The discharge inner wall 121 extending from the upper inner wall 211 of the cylinder body to the discharge port 120 is inclined in a cone shape so that the discharge port 120 rises upward
Precision injection pump.
delete The method according to claim 1,
The seal flange (310)
And a motion ring receiving portion (312) for receiving the motion ring for sealing the engagement portion of the seal flange (310) and the plunger (320) on the inner circumferential surface,
The motion ring is formed so that a sealing ring 11 corresponding to the diameter of the plunger 320 and an O-ring 10 having a diameter larger than that of the sealing ring 11 are combined with each other.
Precision injection pump.
The method according to claim 1 or 3,
The LM module 340
An eccentric adjustment block 341 through which the screw rod 331 penetrates is formed at a front end portion thereof coupled with the plunger 320,

Assuming that the direction of the LM rail 342 is the x-axis, the vertical direction is the z-axis, and the direction perpendicular to the x-axis and the z-axis is y-axis,
The eccentric adjustment block 341
a linear clearance is generated in the direction Ly in which linear motion is performed in the y-axis,
a rotation clearance is generated in a direction (Ry) in which rotation is performed in the xz plane,
a linear clearance is generated in a direction (Lz) in which linear motion is performed on the z axis,
and a rotational clearance is generated in a direction (Rz) in which rotational motion is performed in the xy plane
Precision injection pump.
5. The method of claim 4,
The eccentric adjustment block 341
An LM block 341a formed with a groove corresponding to the LM rail 342 and moving in the x-axis direction along the LM rail 342,
A left and right eccentricity adjusting unit 341b formed of left and right clearance generating plates (b-xy) parallel to the XY plane and upper and lower holding plates (b-xz) parallel to the XZ plane,
And a vertical eccentric adjustment unit 341c formed of a shaft support plate (c-yz) parallel to the YZ plane and a vertical gap generating plate (c-xz) parallel to the XZ plane
Precision injection pump.
6. The method of claim 5,
A plurality of bolt holes 20 are formed on the upper surface of the LM block 341a,
The left and right clearance generation plates (b-xy) are formed with a plurality of adjustment bolt holes (21) at positions corresponding to the bolt holes (20) of the LM block,
The upper and lower support plates (b-xz) are coupled to the upper surfaces of the left and right clearance generation plates (b-xy) and have a plurality of bolt holes (20)
The upper and lower clearance generation plates (c-xz) are formed with a plurality of adjustment bolt holes (21) at positions corresponding to the bolt holes (20) of the upper and lower base plates,
The shaft support plate c-yz is coupled with the upper and lower clearance generation plates c-xz, and a screw rod engaging portion 341d, which is screwed to the screw rod 331,

The adjustment bolt hole 21 is a hole larger than the diameter of the bolt hole 20 and smaller than the screw head,
Characterized in that the screw head is formed as a hole which is not coupled to the screw body but can not penetrate therethrough
Precision injection pump.
The method according to claim 1 or 3,
The seal flange 310 is formed to include a plurality of adjustment bolt holes 21,
A plurality of bolt holes 20 corresponding to the adjustment bolt holes of the seal flange are formed in the cylinder body 200,
The adjustment bolt hole 21 is a hole larger than the diameter of the bolt hole 20 and smaller than the screw head,
Characterized in that the screw head is formed as a hole which is not coupled to the screw body but can not penetrate therethrough
Precision injection pump.
8. The method of claim 7,
An LM rail groove 220 corresponding to the LM rail 342 is formed on the bottom surface of the cylinder body 200,
The LM rail 342 extends from the plunger 300 to the cylinder body 200 so as to be coupled to the LM rail groove 220.
Precision injection pump.
The method according to claim 1 or 3,
The LM module 340
An eccentric adjustment block 341 through which the screw rod 331 penetrates is formed at a front end portion thereof coupled with the plunger 320,

Assuming that the direction of the LM rail 342 is the x-axis, the vertical direction is the z-axis, and the direction perpendicular to the x-axis and the z-axis is y-axis,
The eccentric adjustment block 341
a linear clearance is generated in the direction Ly in which linear motion is performed in the y-axis,
and a rotational clearance is generated in a direction (Ry) in which rotational motion is performed in the xz plane
Precision injection pump.
10. The method of claim 9,
The eccentric adjustment block 341
An LM block 341a formed with a groove corresponding to the LM rail 342 and moving in the x-axis direction along the LM rail 342,
And a left and right eccentricity adjusting unit 341b formed of left and right clearance generating plates (b-xy) parallel to the XY plane and upper and lower holding plates (b-xz) parallel to the XZ plane
Precision injection pump.
11. The method of claim 10,
A plurality of bolt holes 20 are formed on the upper surface of the LM block 341a,
The left and right clearance generation plates (b-xy) are formed with a plurality of adjustment bolt holes (21) at positions corresponding to the bolt holes (20) of the LM block,
The upper and lower base plates b-xz are coupled to the upper surfaces of the left and right clearance generation plates b-xy and are formed with a plurality of bolt holes 20,

The adjustment bolt hole 21 is a hole larger than the diameter of the bolt hole 20 and smaller than the screw head,
Characterized in that the screw head is formed as a hole which is not coupled to the screw body but can not penetrate therethrough
Precision injection pump.
The method according to claim 1 or 3,
The LM module 340
An eccentric adjustment block 341 through which the screw rod 331 penetrates is formed at a front end portion thereof coupled with the plunger 320,

Assuming that the direction of the LM rail 342 is the x-axis, the vertical direction is the z-axis, and the direction perpendicular to the x-axis and the z-axis is y-axis,
The eccentric adjustment block 341
a linear clearance is generated in a direction (Lz) in which linear motion is performed on the z axis,
and a rotational clearance is generated in a direction (Rz) in which rotational motion is performed in the xy plane
Precision injection pump.

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