CN113404688B - Miniature double-hole precision injection pump - Google Patents

Abstract

The invention discloses a miniature double-hole precise injection pump which comprises a support, wherein a linear motor is installed at the bottom of the support, a power output end of the linear motor is connected with a nut, the nut is connected with a sliding block, the sliding block is connected with a connecting rod, the connecting rod is connected with a piston connector through threads, the piston connector is connected with a piston head, the piston head is sleeved with a glass tube, a pump head sleeve is sleeved on the surface of the glass tube, a stop cover is installed at the bottom of the pump head sleeve, a pump sealing block is installed at the top of the pump head sleeve, the pump sealing block is connected with the glass tube, the pump sealing block is connected with a double-hole pump head, and the top of the double-hole pump head is connected with a gland. The invention has the beneficial effects that: the invention provides a miniature double-hole precise injection pump with a novel structural scheme, which can realize the double-hole function on a micro-upgrading displacement pump by matching a pump sealing block with a double-hole pump head, and can meet the requirements of small discharge capacity, precise liquid discharge, small dead volume in the pump and short flow passage from a pump head pipe interface to a two-way electromagnetic valve in a liquid circuit system.

Description

Miniature double-hole precision injection pump

Technical Field

The invention belongs to the technical field of injection pumps, and particularly relates to a miniature double-hole precision injection pump.

Background

In some special application fields in the market, reagents are expensive, a micro-liter-level small-displacement pump is needed to realize accurate quantitative suction and discharge of the reagents, the smaller the dead volume of the pump is, the better the pump is, the shorter the flow channel from a pump head pipe interface to a two-way electromagnetic valve in a liquid path system is, the better the flow channel is, so that cross contamination among different reagents can be avoided, the influence on a test result is caused, the pump is required to have small and exquisite appearance size, the miniaturization of equipment is facilitated, but at present, two products in the market can not meet the requirements; one is a conventional milliliter-level syringe pump as shown in fig. 3, which is composed of a pump head sleeve 1a, agland 2a, a connectingrod 3a, apiston connector 4a, apiston head 5a and a double-hole pump head 6a, wherein the connectingrod 3a is connected with thepiston connector 4a through threads, thepiston connector 4a is connected with thepiston head 5a, then the pump head sleeve 1a is filled with thepiston head 4a, the double-hole pump head 6a is filled into thegland 2a, and thegland 2a is fixedly arranged on the pump head sleeve 1a, so that the dead volume of the pump can be reduced, the flow passage of a two-way electromagnetic valve in a liquid circuit system is short, but the scheme has the defects that microliter displacement accurate liquid suction and discharge cannot be realized, and the external dimension of the pump is large;

the other is a micro-upgrading single syringe as shown in fig. 4, the scheme is composed of a syringe cylinder 1b, apiston rod 2b, afixed connector 3b, an invertedconnector 4b, apiston 5b, aninjection head 6b and a T-shaped three-way head 7b, thepiston rod 2b is in threaded connection with thefixed connector 3b, thefixed connector 3b is in threaded connection with the invertedconnector 4b, the invertedconnector 4b is clamped into thepiston 5b, the assembledpiston 5b is assembled into the syringe cylinder 1b, theinjection head 6b is assembled into the syringe cylinder 1b and locked and fixed through a cover plate, and the T-shaped three-way head 7b is assembled into theinjection head 6b to achieve a double-hole function, so that micro-liter displacement precise liquid suction and discharge can be achieved, but in order to achieve liquid suction and discharge, a transmission assembly module needs to be added, so that the external dimension is very large, and the requirement that a flow channel of a pipe interface to a two-way electromagnetic valve in a liquid path system is shorter by an external three-way head cannot be met.

Disclosure of Invention

In view of the problems raised by the background art described above, the present invention has an object to: aims to provide a miniature double-hole precision injection pump.

In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:

miniature diplopore accurate syringe pump, which comprises a bracket, linear electric motor is installed to the support bottom, linear electric motor's power take off end is connected with the nut, the nut is connected with the slider, the slider is connected with the connecting rod, the connecting rod has the piston connector through threaded connection, the piston connector is connected with the piston head, the piston head cover is equipped with the glass pipe, glass pipe surface cover is equipped with the pump head cover, the pump head cover bottom is installed and is kept off the lid, the sealed piece of pump is installed at pump head cover top, the sealed piece of pump is connected with the glass pipe, the sealed piece of pump is equipped with the splitter box, the sealed piece of pump is connected with the diplopore pump head, the both sides of diplopore pump head are equipped with the fluid flow hole, the fluid flow hole is connected with the splitter box, diplopore pump head top is connected with the gland.

Further inject, the double-hole pump head is equipped with first sealing washer with pump head cover junction. The structural design enables the joint of the double-hole pump head and the pump head sleeve to have a sealing effect.

Further limit, the pump seal block is equipped with the second sealing washer with the glass pipe junction. The structural design enables the joint of the pump sealing block and the glass tube to have a sealing effect.

Further, the gland presses the dual-bore pump head against the pump seal block by screw locking. Such structural design makes the fixed effectual to diplopore pump head.

Further, the piston head and the piston connector are connected together through interference. The structural design makes the connection simple and stable.

Further, the nut is in locking connection with the sliding block through a screw. Such a structural design makes the connection more stable.

The invention has the beneficial effects that: the invention provides a miniature double-hole precise injection pump with a novel structural scheme, which can realize the double-hole function on a micro-upgrading displacement pump by matching a pump sealing block with a double-hole pump head, can meet the requirement of small discharge capacity and precise liquid discharge on the market, has small dead volume in the pump, and has the requirement of short flow passage from a pump head pipe interface to a two-way electromagnetic valve in a liquid circuit system, and does not need other transmission component modules, thereby ensuring the small appearance size.

Drawings

The invention is further illustrated by the non-limiting examples given in the accompanying drawings;

FIG. 1 is a schematic structural diagram of a micro dual-hole precision injection pump according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of a micro double-hole precision syringe pump according to an embodiment of the present invention;

FIG. 3 is a schematic view of a milliliter-scale syringe pump;

FIG. 4 is a schematic structural diagram of a micro-upgraded single syringe;

the main element symbols are as follows:

the device comprises agland 1, a double-hole pump head 2, apump head sleeve 3, aglass tube 4, ablocking cover 5, asupport 6, a sliding block 7, alinear motor 8, aconnecting rod 9, apiston connector 10, apiston head 11, apump sealing block 12, afirst sealing ring 13, asecond sealing ring 131, anut 14, adiversion channel 15, a fluidflow channel hole 16, a pump head sleeve 1a, agland 2a, a connectingrod 3a, apiston connector 4a, apiston head 5a, a double-hole pump head 6a, a syringe cylinder body 1b, apiston rod 2b, afixed connector 3b, a back-offconnector 4b, apiston 5b, aninjection head 6b and a T-shaped three-way head 7b.

Detailed Description

In order that those skilled in the art can better understand the present invention, the following technical solutions are further described with reference to the accompanying drawings and examples.

As shown in fig. 1-2, the micro double-hole precision injection pump of the invention comprises asupport 6, alinear motor 8 is installed at the bottom of thesupport 6, anut 14 is connected to a power output end of thelinear motor 8, thenut 14 is connected to a slide block 7, the slide block 7 is connected to a connectingrod 9, theconnecting rod 9 is connected to apiston connector 10 through a thread, thepiston connector 10 is connected to apiston head 11, thepiston head 11 is sleeved with aglass tube 4, apump head sleeve 3 is sleeved on the surface of theglass tube 4, astop cover 5 is installed at the bottom of thepump head sleeve 3, apump sealing block 12 is installed at the top of thepump head sleeve 3, thepump sealing block 12 is connected to theglass tube 4, adiversion groove 15 is formed in thepump sealing block 12, a double-hole pump head 2 is connected to thepump sealing block 12, fluidflow passage holes 16 are formed in two sides of the double-hole pump head 2, the fluidflow passage holes 16 are connected to thediversion groove 15, and agland 1 is connected to the top of the double-hole pump head 2.

During the use,motor 8 drivesnut 14 when rotating, andnut 14 drives slider 7 and removes, and slider 7 promotes connectingrod 9, and connectingrod 9 promotespiston connector 10, andpiston connector 10 promotespiston head 11 to makepiston head 11 remove atglass pipe 4, and then realize the pressure change in theglass pipe 4, make liquid can flow out or flow in throughdiplopore pump head 2.

Preferably, afirst sealing ring 13 is arranged at the joint of the double-hole pump head 2 and thepump head sleeve 3. The structural design enables the joint of the double-hole pump head 2 and thepump head sleeve 3 to have a sealing effect. In fact, other sealing structure shapes of the double-hole pump head 2 and thepump head sleeve 3 can be considered according to specific situations.

Preferably, asecond sealing ring 131 is arranged at the joint of thepump sealing block 12 and theglass tube 4. The structural design has the sealing effect at the joint of thepump sealing block 12 and theglass tube 4. In fact, other sealing structure shapes of thepump sealing block 12 and theglass tube 4 may be used according to the specific situation.

Preferably, thegland 1 is screwed to press the dualbore pump head 2 against thepump seal block 12. Such structural design makes the fixed effectual to diploporepump head 2. In fact, other mounting configurations of thegland 1 may be used, as the case may be.

Preferably, thepiston head 11 and thepiston connector 10 are connected together by interference. The structural design makes the connection simple and stable. In fact, other connecting structure shapes of thepiston head 11 and thepiston connector 10 can be considered according to specific situations.

Preferably, thenut 14 is connected to the slider 7 by a screw lock. Such a structural design makes the connection more stable. In fact, other shapes of the connection structure between thenut 14 and the slider 7 may be considered according to the specific situation.

The foregoing embodiments are merely illustrative of the principles of the present invention and its efficacy, and are not to be construed as limiting the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims (6)

1. Miniature diplopore precision injection pump, its characterized in that: including support (6), linear electric motor (8) are installed to support (6) bottom, the power take off end of linear electric motor (8) is connected with nut (14), nut (14) are connected with slider (7), slider (7) are connected with connecting rod (9), connecting rod (9) have piston connector (10) through threaded connection, piston connector (10) are connected with piston head (11), piston head (11) cover is equipped with glass pipe (4), glass pipe (4) surface cover is equipped with pump head cover (3), stop cover (5) are installed to pump head cover (3) bottom, pump seal block (12) are installed at pump head cover (3) top, pump seal block (12) are connected with glass pipe (4), pump seal block (12) are equipped with splitter box (15), pump seal block (12) are connected with diplopore pump head (2), the both sides of diplopore pump head (2) are equipped with fluid flow channel hole (16), fluid flow channel hole (16) are connected with splitter box (15), diplopore (2) top gland (1).

2. The micro dual-orifice precision syringe pump of claim 1, wherein: a first sealing ring (13) is arranged at the joint of the double-hole pump head (2) and the pump head sleeve (3).

3. The micro dual-orifice precision syringe pump of claim 2, wherein: and a second sealing ring (131) is arranged at the joint of the pump sealing block (12) and the glass tube (4).

4. The micro dual-orifice precision syringe pump of claim 3, wherein: the gland (1) is locked by screws to press the double-hole pump head (2) on the pump sealing block (12).

5. The micro dual-orifice precision syringe pump of claim 4, wherein: the piston head (11) and the piston connector (10) are connected together through interference.

6. The micro dual-orifice precision syringe pump of claim 5, wherein: the nut (14) is connected with the sliding block (7) in a locking mode through a screw.

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