TWI571306B - Liquid microinjection device - Google Patents

Description

Liquid microinjection device

The invention relates to the technical field of a liquid microinjection device, in particular to a liquid microinjection device capable of accurately controlling the injection amount of a liquid to improve the quality, and which can greatly save manpower and improve work efficiency.

Generally, in the processing and biochemical technology industries, it is often necessary to use a small amount of liquid to process or formulate a formulation, for example, by injecting a small amount of glue to bond a small workpiece, injecting a trace amount of pigment to prepare a color or a printed pattern, and injecting a trace amount. Chemicals to prepare formulas, etc. At present, the liquid micro-injection method is mostly that the user directly uses the syringe to manually suck the liquid material and then injects it, so the injection amount is often affected by human factors and cannot be accurately controlled, which often leads to unstable quality and high defect rate. problem. Moreover, the use of manpower for liquid microinjection will greatly increase labor costs and not be economical.

Conventionally, the use of manpower to inject a small amount of liquid into a syringe has many disadvantages such as incapable of accurately controlling the injection amount of liquid, high labor cost, and poor work efficiency.

The invention provides a liquid microinjection device comprising a fixing base, a syringe and an electric cylinder. Wherein, the syringe comprises a barrel and a push rod And a needle. The barrel body can be fixed in the fixing base, the lower end of the barrel body has a discharge opening, the upper end has a pushing port, and a side of the side near the discharging opening is provided with an inlet opening for connecting to a feeding device for use. The feed material is fed into the liquid, and has an exhaust overflow port near the push port. The discharge port is provided with a one-way discharge check valve, and a one-way feed check valve is arranged in the feed port. When the feed material fed by the feed port is excessive or there is air in the raw material, the exhaust overflow port can be led out, and the one-way discharge check valve is such that the raw material in the barrel can only be unidirectionally The discharge port is outflowed, and the one-way feed check valve is configured to feed the raw material of the inlet port into the cylinder body only in one direction, and the opening pressure of the one-way discharge check valve is greater than the one-way The check valve is fed so that the one-way discharge check valve is not opened when the one-way feed check valve is fed. The lower end of the push rod extends from the pusher opening into the barrel body, and the lower end of the push rod has a push plug, and the push rod can be lowered to cause the push material to feed the raw material in the barrel to the discharge port Squeeze to open the one-way discharge check valve. The upper end of the needle is coupled to the discharge port for guiding the material to the outside. The electric cylinder comprises a pusher and a motor, the pusher is coupled to the upper end of the base body, and the bottom has a telescopic drive rod, the end of the drive rod is coupled with the upper end of the push rod, and the motor can be driven The drive rod is telescopic and precisely controls the amount of expansion and contraction of the drive rod.

The liquid microinjection device provided by the present invention can utilize the pressure of the one-way feed check valve and the one-way discharge check valve and cooperate with the exhaust overflow port, so that the raw material can only be used when the material is fed. The inlet port flows in and fills the inside of the barrel without flowing out from the discharge port, and the raw material can only flow out from the discharge port without backflow from the inlet port during injection, and the electric cylinder is used Can also accurately control the push of the putter The delivery volume, in turn, enables automatic feeding and injection to precisely control the amount of injection, greatly saving manpower and improving work efficiency. Moreover, the exhaust overflow port can not only derive the air in the raw material to avoid the air accumulation affecting the discharge stability (air compressibility), but also can be used as a recirculation circulation hole during cleaning to increase the convenience of cleaning.

10‧‧‧ Fixed seat

11‧‧‧

12‧‧‧Clamps

13‧‧‧ Cover

14‧‧‧ fixing bolts

15‧‧‧Combined bolts

20‧‧‧ syringe

21‧‧‧

210‧‧‧ body

211‧‧‧上套

212‧‧‧下头

213‧‧‧feeding head

214‧‧‧Upper stop leak washer

215‧‧‧ Lower leak washer

22‧‧‧Putting

220‧‧‧ Push

221‧‧ Thread segment

23‧‧‧ needle

24‧‧‧Outlet

25‧‧‧Feeding port

26‧‧‧Inlet

260‧‧‧feed fittings

27‧‧‧Exhaust overflow

28‧‧‧One-way discharge check valve

280‧‧‧ Rubber ring

281‧‧‧ cone plug

282‧‧‧Feed spring

29‧‧‧One-way feed check valve

290‧‧‧Rubber O-ring

291‧‧‧ 珠塞

292‧‧ ‧ spring seat

293‧‧‧feed spring

30‧‧‧Electric cylinder

31‧‧‧Pusher

32‧‧‧Motor

33‧‧‧ drive rod

34‧‧‧ screw holes

35‧‧‧ Positioning nut

Figure 1 is a perspective exploded view of the present invention.

Fig. 2 is a perspective exploded view showing the syringe of the present invention.

Figure 3 is a schematic perspective view of the present invention.

Figure 4 is an enlarged schematic cross-sectional view of the combination of the present invention.

Figure 5 is a schematic view of the feeding operation of the present invention.

Figure 6 is a schematic view of the injection action of the present invention.

Referring to Figures 1 to 4, the liquid microinjection device of the present invention comprises a fixing base 10, a syringe 20 and an electric cylinder 30, wherein:

The fixing base 10 includes a body 11 , two clamping blocks 12 and a cover body 13 . The two clamping blocks 12 can be screwed onto the seat body 11 by a plurality of fixing bolts 14 , and the cover body 13 is broken. The face is U-shaped and can be screwed onto the seat body 11 by means of a plurality of coupling bolts 15.

The syringe 20 includes a barrel 21, a push rod 22 and a needle 23. The barrel body 21 can be fixed to the seat body 11 by the two clamping blocks 12, and the tube body The lower end of the body 21 has a discharge port 24, and the upper end has a push port 25, a side of which is provided with a feed port 26 near the discharge port 24, and an exhaust overflow port near the push port 25 27, a one-way discharge check valve 28 is disposed in the discharge port 24, and a one-way feed check valve 29 is disposed in the inlet port 26. The inlet port 26 can be connected to a feeding device (not shown) for feeding the liquid material into the barrel 21 from the inlet port 26. The exhaust overflow port 27 can be connected to an overflow bucket (not shown), and when the feed port 26 is fed into the cylinder 21 with too much material or air in the raw material, the exhaust can be exhausted. The overflow port 27 discharges the excess material in the barrel 21 and the air in the material into the overflow tank. The one-way discharge check valve 28 allows the raw material in the cylinder 21 to flow out only from the discharge port 24 in one direction without flowing backward. The one-way feed check valve 29 allows the raw material of the inlet port 26 to be fed into the tubular body 21 only in one direction without flowing backward. The one-way discharge check valve 28 has a closing pressure greater than the one-way feed check valve 29, so that the one-way discharge check valve 28 does not enter when the one-way feed check valve 29 is fed. Was opened. The lower end of the push rod 22 extends from the pusher opening 25 into the barrel body 21. The lower end of the push rod 22 has a push plug 220 and a threaded section 221 at the upper end. The push rod 22 can be lowered to cause the push plug 220 to press the material in the barrel 21 to the discharge port 24 to open the one-way discharge check valve 28. The upper end of the needle 23 is coupled to the discharge opening 24 of the barrel 21 for guiding the material extruded from the discharge port 24 to the outside.

The electric cylinder 30 includes a pusher 31 and a motor 32. The pusher 31 is coupled to the upper end of the base body 11 and has a telescopic drive rod 33 at the bottom. The end surface of the drive rod 33 has a threaded hole 34 for the upper end of the push rod 22 The 221 is screwed, and a positioning nut 35 is screwed on the threaded portion 221 to position and connect the upper end of the push rod 22 to the driving rod 33. The motor 32 is capable of driving the drive rod 33 to expand and contract, and precisely controls the amount of expansion and contraction of the drive rod 33. The electric cylinder 30 is a conventional technique, as shown in Taiwan Patent No. M387724, which will not be further described. In the present invention, the motor 32 may be a stepping motor or a servo motor or the like.

It can be seen in the figures 2 and 4 that the body 21 is composed of a body 210, an upper sleeve 211, a lower sleeve 212 and a feed sleeve 213, wherein the side of the body 210 is provided with the row. The gas overflow port 27 and a feed joint 260. The upper sleeve 211 is screwed to the upper end of the body 210 for the push rod 22 to pass through. An upper leakage washer 214 is disposed between the upper sleeve 211 and the body 210. The lower sleeve 212 is screwed to the lower end of the body 210, and the needle 23 is sleeved. A lower leakage washer 215 is disposed between the lower sleeve 212 and the body 210. The feed sleeve 213 is threaded onto the feed joint 260.

It can also be seen in the second and fourth figures that the one-way discharge check valve 28 is disposed between the lower sleeve 212 and the body 210, and includes a rubber ring 280, a cone plug 281 and a discharge. a spring 282 is disposed in the lower end opening of the body 210. The taper 281 is a circular hole that can be locked from the bottom to the center of the rubber ring 280. The discharge spring 282 is one end of the lower sleeve. The other end of the 212 is biased against the taper 281 to provide a resilient force to cause the taper 281 to plug the circular hole in the center of the rubber ring 280. The one-way feed check valve 29 is disposed between the feed joint 260 and the feed sleeve 213, and includes a rubber O-ring 290, a bead plug 291, a spring seat 292 and a feed spring 293. The rubber O-ring 290 is disposed on the open end surface of the feed joint 260, and the bead plug 291 is The circular hole in the center of the rubber O-ring 290 can be plugged from the inside to the outside. The spring seat 292 is disposed in the feed joint 260. The feed spring 293 is one end of the spring seat 292 and the other end of the spring seat 292. The bead stopper 291 provides an elastic force to cause the bead stopper 291 to plug the circular hole in the center of the rubber O-ring 290.

Referring to FIG. 5, when there is gas in the first feed or found in the raw material, the electric cylinder 30 drives the push rod 22 to rise to a position where the push plug 220 is higher than the exhaust overflow port 27, When the feeding device feeds the liquid material from the inlet port 26, the material opens the one-way feeding check valve 29 to allow the raw material to enter the barrel 21, and the feeding pressure causes the barrel The air in 21 is discharged from the exhaust overflow port 27, and because it is insufficient to open the one-way discharge check valve 28, the injected raw material can only be filled upwardly to fill the barrel 21, and when the raw material When the inside of the barrel 21 is filled, the air in the raw material is extruded from the exhaust overflow port 27 to prevent the air accumulation from affecting the discharge stability (air compressibility), and the excess material in the barrel 21 can also be The exhaust overflow port 27 is led out.

Referring to FIG. 6, when the barrel 21 is filled with raw materials, the electric cylinder 30 drives the push rod 22 to descend, and the push plug 220 pushes the material in the barrel 21 downward. When the one-way feed check valve 29 is closed by the material pressure inside the barrel 21, it cannot be reversely flowed out of the inlet port 26, and the material pressure in the barrel 21 opens the one-way discharge check valve 28, The raw material is allowed to flow into the needle 23 and is injected to the desired position. When the injection is completed, the electric cylinder 30 drives the push rod 22 to rise to a position where the push plug 220 is lower than the exhaust overflow port 27, and the feeding device is fed into the liquid state from the inlet port 26. Raw material to fill the barrel 21, then stop Then, the electric cylinder 30 is driven to lower the push rod 22 to push the material in the barrel 21 downward, so as to repeat the above, the push rod 22 is raised to make the push plug 220 lower than the exhaust overflow. The position of the material port 27 and the simultaneous feeding and stopping of the feeding and the lowering of the push rod 22 can achieve the purpose of continuously and automatically injecting the liquid and precisely controlling the injection amount. Moreover, when the gas in the raw material is found to be in the above-mentioned repeated injection operation or if the cleaning operation is to be performed, the push rod 22 is raised again to make the push plug 220 higher than the exhaust overflow opening. The position of 27 is to extrude the air in the raw material or use the exhaust overflow port 27 as a recirculation circulation hole for cleaning to facilitate the cleaning operation.

The liquid microinjection device provided by the present invention can utilize the pressure of the one-way feed check valve 29 and the one-way discharge check valve 28 and cooperate with the exhaust overflow port 27, so that the raw materials only when feeding The inside of the barrel 21 can be filled by the inlet port 26 without flowing out of the discharge port 24, and the raw material can only flow out from the discharge port 24 at the time of injection without being fed by the inlet port. 26 counterflow, and the electric cylinder 30 can also accurately control the pushing amount of the push rod 22, thereby enabling automatic feeding and injection to accurately control the injection amount, greatly saving manpower and improving work efficiency. Moreover, the exhaust overflow port 27 can not only derive the air in the raw material to avoid the air accumulation affecting the discharge stability (air compressibility), but also can be used as a recirculation circulation hole during cleaning to increase the convenience of cleaning.

10‧‧‧ Fixed seat

11‧‧‧

12‧‧‧Clamps

13‧‧‧ Cover

14‧‧‧ fixing bolts

20‧‧‧ syringe

21‧‧‧

210‧‧‧ body

211‧‧‧上套

212‧‧‧下头

213‧‧‧feeding head

214‧‧‧Upper stop leak washer

215‧‧‧ Lower leak washer

22‧‧‧Putting

220‧‧‧ Push

221‧‧ Thread segment

23‧‧‧ needle

24‧‧‧Outlet

25‧‧‧Feeding port

26‧‧‧Inlet

260‧‧‧feed fittings

27‧‧‧Exhaust overflow

28‧‧‧One-way discharge check valve

280‧‧‧ Rubber ring

281‧‧‧ cone plug

282‧‧‧Feed spring

29‧‧‧One-way feed check valve

290‧‧‧Rubber O-ring

291‧‧‧ 珠塞

292‧‧ ‧ spring seat

293‧‧‧feed spring

30‧‧‧Electric cylinder

31‧‧‧Pusher

32‧‧‧Motor

33‧‧‧ drive rod

34‧‧‧ screw holes

35‧‧‧ Positioning nut

Claims (5)

A liquid microinjection device comprises: a fixing base; a syringe comprising a barrel body, a push rod and a needle, wherein the barrel body can be fixed in the fixing base, the barrel body is composed of a body and an upper part The utility model is composed of a ferrule, a lower ferrule and a feeding ferrule. The lower end of the body has a discharge opening, the upper end has a pushing opening, and a side is provided near the discharging opening with an inlet opening, and near the pushing opening An exhaust overflow opening, the upper sleeve is screwed to the upper end of the body, the lower sleeve is screwed to the lower end of the body, and the feeding sleeve is screwed on the feeding joint for connecting to a feeding device for use Feeding a liquid material, the lower sleeve and the body are provided with a one-way discharge check valve, the one-way discharge check valve comprises a rubber ring, a cone plug and a discharge spring, the rubber ring Provided in the lower end opening of the body, the taper can be plugged from the bottom to the circular hole in the center of the rubber ring, the discharge spring has one end abutting the lower sleeve, and the other end is opposite to the taper to provide elastic force The taper plugs a circular hole in the center of the rubber ring to make the cylinder The material can only flow out from the discharge port in one direction, and a one-way feed check valve is arranged between the feed joint and the feed sleeve, the one-way feed check valve comprises a rubber O-ring, a a bead plug, a spring seat and a feed spring, the rubber O-ring is disposed at an opening end surface of the feed joint, and the bead plug can block a circular hole in the center of the rubber O-ring from the inside to the outside, the spring seat In the feed joint, the feed spring has one end abutting the spring seat and the other end abutting the bead plug to provide an elastic force to cause the bead plug to plug the circular hole in the center of the rubber O-ring, so that the feed Raw material The material can only be fed into the barrel in one direction, and the opening pressure of the one-way discharge check valve is greater than the one-way feed check valve, so that when the one-way feed check valve is fed The one-way discharge check valve is not opened, and when the feed port feeds too much material or there is air in the raw material, it can be led out from the exhaust overflow port, and the lower end of the push rod passes through the lower cover And the pusher mouth extends into the barrel body, the lower end of the push rod has a push plug, and the push rod can be pressed to push the material in the barrel to the discharge port to open The one-way discharge check valve, the upper end of the needle is coupled to the lower end of the lower sleeve for guiding the raw material to the outside; and the electric cylinder includes a pusher and a motor, and the pusher is coupled to the fixed The upper end of the seat has a telescopic drive rod at the bottom, and the end of the drive rod is coupled with the upper end of the push rod. The motor can drive the drive rod to expand and contract, and precisely control the amount of expansion and contraction of the drive rod. The liquid microinjection device according to claim 1, wherein the fixing base comprises a body, two clamping blocks and a cover body, and the two clamping blocks can be screwed on the seat body by using a plurality of fixing bolts for The barrel body is clamped and fixed on the seat body, and the cover body can be screwed on the seat body by a plurality of joint bolts for covering the barrel body and the push rod on the inner side. The liquid microinjection device of claim 1, wherein the exhaust gas spill port is connectable to a spill tank for collecting excess material that has overflowed. The liquid microinjection device of claim 1, wherein the upper end of the push rod has a threaded portion, and the end surface of the driving rod has a screw hole for screwing the threaded portion of the upper end of the push rod, and the screw portion of the push rod is screwed a positioning nut for the push rod The upper end is positioned and coupled to the drive rod. The liquid microinjection device of claim 1, wherein an upper leakage preventing gasket is disposed between the upper sleeve and the body, and a lower leakage gasket is disposed between the lower sleeve and the body.