CN212535968U

CN212535968U - Liquid transmission instrument

Info

Publication number: CN212535968U
Application number: CN202021517573.9U
Authority: CN
Inventors: 胡传来; 李海洋
Original assignee: Jiaxing Ruita Technology Co ltd
Current assignee: Jiaxing Ruita Technology Co ltd
Priority date: 2020-07-28
Filing date: 2020-07-28
Publication date: 2021-02-12
Anticipated expiration: 2030-07-28

Abstract

The utility model relates to an automatic technical field of liquid operation, more specifically say, it relates to a liquid transmission instrument, including the shell and all arrange operating panel on the shell in, the motor of valve body and the control valve body motion that supplies liquid to carry, motor and operating panel electric connection, the valve body has casing and piston, the cavity that supplies the piston activity has in the casing, inlet and liquid outlet have on the casing, be connected with the feed liquor pipe of input liquid on the inlet, be connected with the drain pipe of output liquid on the liquid outlet, be equipped with the solenoid valve of being connected with inlet and liquid outlet on the casing, the output and the piston connection of motor to the drive piston goes up and down in the cavity, and then absorb liquid to the cavity through the feed liquor pipe and discharge liquid in the cavity, the utility model discloses rational in infrastructure simple, the practicality is strong, and the infusion is stable.

Description

Liquid transmission instrument

Technical Field

The utility model relates to an automatic liquid operation's technical field, more specifically says that it relates to a liquid transmission instrument.

Background

In laboratories such as chemistry, biology, disease control, metering, quality control, and clinic, a large number of liquid operations including liquid separation, dilution, titration, and liquid transfer are often required. Especially, with the increase of various epidemic viruses, higher requirements are put on biochemical experiments.

The prior liquid transmission instrument has complex structure, high cost and poor infusion stability.

SUMMERY OF THE UTILITY MODEL

To the deficiency that prior art exists, the utility model aims to provide a liquid transmission instrument with reasonable and simple structure, strong practicability and stable infusion.

In order to achieve the above purpose, the utility model provides a following technical scheme:

a liquid transmission instrument comprises a shell, an operation panel, a valve body and a motor, wherein the operation panel, the valve body and the motor are arranged on the shell, the valve body is used for conveying liquid, the motor is used for controlling the movement of the valve body, the motor is electrically connected with the operation panel,

the valve body is provided with a shell and a piston, a cavity for the piston to move is arranged in the shell, the shell is provided with a liquid inlet and a liquid outlet which are communicated with the cavity, the liquid inlet is connected with a liquid inlet pipe for inputting liquid, the liquid outlet is connected with a liquid outlet pipe for outputting liquid,

the shell is provided with an electromagnetic valve connected with the liquid inlet and the liquid outlet, and the output end of the motor is connected with the piston so as to drive the piston to lift in the cavity, and further suck liquid into the cavity through the liquid inlet pipe and discharge the liquid in the cavity through the liquid outlet pipe.

The utility model discloses further set up to: the shell includes interconnect's front panel and box body, has the spout that switches on with the box body on the front panel, and in the box body was arranged in to the motor, step motor's output connected lead screw, sliding connection had the direction subassembly on the lead screw, and the direction subassembly is arranged in the spout and is connected in the piston, the end of piston has the connecting portion of being connected with the direction subassembly.

The utility model discloses further set up to: the guide assembly comprises a fixed part connected with the screw rod and a movable part arranged in the sliding groove, and the connecting part is matched with the movable part;

the movable part middle part has the recess, and the breach that switches on with the recess is seted up on movable part upper portion, and the through-hole that switches on with the recess is seted up to movable part lower part, and threaded connection has a set screw on the through-hole, in the recess was gone into to the connecting portion card, the end and the connecting portion of set screw are contradicted.

The utility model discloses further set up to: a sealing structure is arranged between the piston and the shell, and comprises a sealing cover plate, a sealing ring and an outer circular hole which is arranged on the bottom of the shell and communicated with the cavity;

the diameter of outer round hole is greater than the diameter of cavity to form the retaining ring between outer round hole and cavity, set up the ring channel that supplies the sealing washer to settle on the retaining ring, the middle part shaping of sealed apron has the extrusion portion that stretches into outer round hole and contradict with the sealing washer, and the extrusion portion center has the centre bore that supplies the piston to run through, and the week side of sealed apron is fixed through screw and casing.

The utility model discloses further set up to: the piston is arranged in the cavity and made of ceramic relative to the body of the cavity.

The utility model discloses further set up to: four U-shaped notches are formed in the shell, locking screws are connected to the U-shaped notches in a threaded mode, and the back face of the shell is abutted to the front panel and fixed to the front panel through the locking screws.

The utility model discloses further set up to: the electromagnetic valve is connected with the back of the shell and is arranged in the box body, and the electromagnetic valve is electrically connected with the operation panel.

Contrast prior art not enough, the beneficial effects of the utility model are that:

1. the liquid inlet and outlet quantity of the liquid is controlled through the operation panel, the whole process is intelligently controlled, and the precision is improved. Compared with the structure of the traditional syringe, the structure of the valve body is more stable in transfusion transmission and strong in air tightness;

2. the direct connection relation of each part is simple, and the disassembly and the assembly of the equipment are facilitated.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a schematic structural diagram of the internal connection of the present invention.

Fig. 3 is a schematic perspective view of the valve body.

Fig. 4 is a schematic cross-sectional view of the housing.

Detailed Description

Embodiments of the present invention are further described with reference to fig. 1 to 4.

The present embodiment has the configuration: the liquid-conveying valve comprises a shell 1, an operation panel 1a, two valve bodies 1b and a motor 4, wherein the operation panel 1a, the two valve bodies 1b and the motor 4 are all arranged on the shell 1, the two valve bodies are used for conveying liquid, the motor 4 is used for controlling the valve bodies to move, and the motor 4 is electrically connected with the operation panel. The operation panel is internally provided with a CPU and a control system and is provided with an operation interface.

The valve body is provided with a shell 2 and a piston 3, wherein the shell 2 is made of tetrafluoroethylene. The shell 2 is internally provided with a cavity 20 for the piston 3 to move, the motor 4 is a stepping motor 4, and the motor 4 controls the piston 3 to lift in the valve body.

The body part of the piston 3 moving with the cavity 20 is made of ceramics, the ceramics has the characteristic of corrosion resistance, and the friction force is small in the moving process of the piston 3 and the cavity 20, so that the liquid outlet precision is improved, and the service life of the valve body is also prolonged.

The housing 2 has a liquid inlet 201 and a liquid outlet 202 both communicated with the cavity 20, the liquid inlet 201 is connected with a liquid inlet pipe for inputting liquid, and the liquid outlet 202 is connected with a liquid outlet pipe for outputting liquid.

The shell 2 is provided with an electromagnetic valve 5 connected with a liquid inlet 201 and a liquid outlet 202, and the output end of the motor 4 is connected with the piston 3 so as to drive the piston 3 to lift in the cavity 20, and further absorb liquid into the cavity 20 through the liquid inlet pipe and discharge the liquid in the cavity 20 through the liquid outlet pipe.

The principle of the construction is as follows: when the motor 4 controls the piston 3 to descend, the air pressure in the cavity 20 is reduced, the electromagnetic valve 5 opens the liquid inlet 201, liquid can enter the pumped cavity 20 from the liquid inlet pipe, when the liquid is to be output, the electromagnetic valve 5 closes the liquid inlet 201, opens the liquid outlet 202, the motor 4 controls the piston 3 to be lifted upwards, and the liquid is extruded to the liquid outlet 202 to the liquid outlet pipe under pressure.

The shell 1 comprises a front panel 11 and a box body 11a which are connected with each other, a sliding groove 110 communicated with the box body is formed in the front panel 11, the motor 4 is arranged in the box body and fixed with the box body 11a, the output end of the motor 4 is downwards connected with a screw rod 41, a guide assembly is connected onto the screw rod 41 in a sliding mode, the guide assembly is arranged in the sliding groove 110 and connected to a piston 3, and the tail end of the piston 3 is provided with a connecting portion 3a connected with the guide assembly. The electromagnetic valve 5 is connected with the back of the shell 2 and is arranged in the box body, and the electromagnetic valve 5 is electrically connected with the operation panel.

The guiding component comprises a fixed part connected with the screw rod 41 and a movable part arranged in the sliding groove 110, and the connecting part 3a is matched with the movable part. The connecting part is provided with two cylinders which are in an up-down relationship, the diameter of the upper cylinder 311 is larger than that of the lower cylinder 312, a section of guide post 312 for clamping is arranged between the upper cylinder and the lower cylinder, and the diameter of the guide post 312 is smaller than that of the lower cylinder.

The middle part of the movable part 62 is provided with a groove 620, the upper part of the movable part 62 is provided with a notch 600 communicated with the groove 620, the lower part of the movable part 62 is provided with a through hole communicated with the groove, the through hole is connected with a fixing screw 7 through threads, the connecting part is clamped into the groove 620, and the end head of the fixing screw 7 is abutted against the connecting part.

During installation: the lower cylinder of the connecting portion of the piston 3 is pushed into the groove 620, and the guide post 312 is clamped into the notch, and finally, the bottom of the lower cylinder is pressed by screwing the fixing screw, so that the connection between the motor 4 and the piston 3 is completed.

A sealing structure is arranged between the piston 3 and the shell 2, and comprises a sealing cover plate 2a, a sealing ring 2b and an excircle hole 2c which is arranged on the bottom of the shell 2 and communicated with the cavity 20;

the diameter of outer round hole is greater than the diameter of cavity 20 to form the retaining ring between outer round hole and cavity 20, set up the ring channel that supplies the sealing washer to settle on the retaining ring, the middle part shaping of sealed apron 2a has the extrusion portion 211 that stretches into outer round hole and contradict with the sealing washer, and the extrusion portion center has the centre bore 210 that supplies piston 3 to run through, and the week side of sealed apron 2a is fixed through screw and casing 2.

During the installation of the piston 3 and the housing 2, the sealing ring is firstly pressed into the annular groove, then the piston 3 is inserted against the central hole of the sealing cover plate, the ceramic part of the sealing cover plate is inserted into the housing 2 while the sealing cover plate is carried, and finally the sealing cover plate and the housing 2 are fixed through screws. The sealing structure greatly improves the sealing performance of the valve body, and avoids liquid from overflowing from the movable station port of the shell 2.

Four U-shaped notches 201 are formed in the shell 2, locking screws are connected to the U-shaped notches in a threaded mode, and the back face of the shell 2 and the front panel 11 are abutted and fixed with the front panel 11 through the locking screws. The U-shaped notch facilitates the force application fixation of the locking screw.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and the skilled in the art can carry out the common changes and replacements within the technical solution of the present invention.

Claims

1. A liquid transfer apparatus, comprising: comprises a shell, an operation panel, a valve body and a motor, wherein the operation panel, the valve body and the motor are arranged on the shell, the valve body is used for conveying liquid, the motor is used for controlling the valve body to move, the motor is electrically connected with the operation panel,

2. The fluid transfer instrument of claim 1, wherein: the shell includes interconnect's front panel and box body, has the spout that switches on with the box body on the front panel, and in the box body was arranged in to the motor, the lead screw was connected to the output of motor, and sliding connection has the direction subassembly on the lead screw, and the direction subassembly is arranged in the spout and is connected in the piston, the end of piston has the connecting portion of being connected with the direction subassembly.

3. The fluid transfer instrument of claim 2, wherein: the guide assembly comprises a fixed part connected with the screw rod and a movable part arranged in the sliding groove, and the connecting part is matched with the movable part;

4. The fluid transfer instrument of claim 1, wherein: a sealing structure is arranged between the piston and the shell, and comprises a sealing cover plate, a sealing ring and an outer circular hole which is arranged on the bottom of the shell and communicated with the cavity;

5. A fluid transfer device as claimed in claim 3 or 4, wherein: the piston is arranged in the cavity and made of ceramic relative to the body of the cavity.

6. The fluid transfer instrument of claim 2, wherein: four U-shaped notches are formed in the shell, locking screws are connected to the U-shaped notches in a threaded mode, and the back face of the shell is abutted to the front panel and fixed to the front panel through the locking screws.

7. The fluid transfer instrument of claim 6, wherein: the electromagnetic valve is connected with the back of the shell and is arranged in the box body, and the electromagnetic valve is electrically connected with the operation panel.