1. Miniature diplopore precision injection pump, its characterized in that: comprises a bracket (6), linear electric motor (8) is installed to support (6) bottom, the power take off end of linear electric motor (8) is connected with nut (14), nut (14) is 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), fender lid (5) is installed to pump head cover (3) bottom, pump seal block (12) is installed at pump head cover (3) top, pump seal block (12) is connected with glass pipe (4), pump seal block (12) is equipped with splitter box (15), pump seal block (12) is connected with diplopore (2), two sides of the double-hole pump head (2) are provided with fluid flow passage holes (16), the fluid flow passage holes (16) are connected with a splitter box (15), and the top of the double-hole pump head (2) is connected with a 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) presses the double-hole pump head 2 on the pump sealing block 12 through screw locking.

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.

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, a gland 2a, a connecting rod 3a, a piston connector 4a, a piston head 5a and a double-hole pump head 6a, wherein the connecting rod 3a is connected with the piston connector 4a through threads, the piston connector 4a is connected with the piston head 5a, then the pump head sleeve 1a is filled with the piston head 4a, the double-hole pump head 6a is filled into the gland 2a, and the gland 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, a piston rod 2b, a fixed connector 3b, an inverted connector 4b, a piston 5b, an injection head 6b and a T-shaped tee joint 7b, the piston rod 2b is connected with the fixed connector 3b through threads, the fixed connector 3b is connected with the inverted connector 4b through threads, the inverted connector 4b is clamped into the piston 5b, the assembled piston 5b is arranged in the syringe cylinder 1b, the injection head 6b is arranged in the syringe cylinder 1b and is locked and fixed through a cover plate, and the T-shaped tee joint 7b is arranged on the injection head 6b to realize a double-hole function, so that micro-liter displacement precise liquid suction and discharge can be realized, but in order to realize liquid suction and discharge, a transmission assembly module is required to be added, so that the external dimension is very large, the requirement that the runner of the two-way electromagnetic valve in a liquid path system from the interface of the pump head pipe to the pump head pipe is shorter cannot be met by the mode of externally connecting the three-way joint.

Disclosure of Invention

In view of the problems raised by the above background art, the present invention is directed 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 precision injection 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 way hole, the fluid flow way 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 diagram 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 a gland 1, a double-hole pump head 2, a pump head sleeve 3, a glass tube 4, a blocking cover 5, a support 6, a sliding block 7, a linear motor 8, a connecting rod 9, a piston connector 10, a piston head 11, a pump sealing block 12, a first sealing ring 13, a second sealing ring 131, a nut 14, a diversion channel 15, a fluid flow channel hole 16, a pump head sleeve 1a, a gland 2a, a connecting rod 3a, a piston connector 4a, a piston head 5a, a double-hole pump head 6a, a syringe cylinder body 1b, a piston rod 2b, a fixed connector 3b, a back-off connector 4b, a piston 5b, an injection head 6b and a T-shaped tee joint 7 b.

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 a support 6, a linear motor 8 is installed at the bottom of the support 6, a nut 14 is connected to a power output end of the linear motor 8, the nut 14 is connected to a slide block 7, the slide block 7 is connected to a connecting rod 9, the connecting rod 9 is connected to a piston connector 10 through a thread, the piston connector 10 is connected to a piston head 11, the piston head 11 is sleeved with a glass tube 4, a pump head sleeve 3 is sleeved on the surface of the glass tube 4, a stop cover 5 is installed at the bottom of the pump head sleeve 3, a pump sealing block 12 is installed at the top of the pump head sleeve 3, the pump sealing block 12 is connected to the glass tube 4, a diversion groove 15 is formed in the pump sealing block 12, a double-hole pump head 2 is connected to the pump sealing block 12, fluid flow passage holes 16 are formed in two sides of the double-hole pump head 2, the fluid flow passage holes 16 are connected to the diversion groove 15, and a gland 1 is connected to the top of the double-hole pump head 2.

During the use, motor 8 drives nut 14 when rotating, and nut 14 drives slider 7 and removes, and slider 7 promotes connecting rod 9, and connecting rod 9 promotes piston connector 10, and piston connector 10 promotes piston head 11 to make piston head 11 remove at glass pipe 4, and then realize the pressure change in the glass pipe 4, make liquid can flow out or flow in through diplopore pump head 2.

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

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

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

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

Preferably, the nut 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 the nut 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.