CN217602857U

CN217602857U - Electric piston type liquid nitrogen transfer pump

Info

Publication number: CN217602857U
Application number: CN202221271280.6U
Authority: CN
Inventors: 王剑; 王海萍
Original assignee: Beijing Yili Biotechnology Development Co ltd
Current assignee: Beijing Yili Biotechnology Development Co ltd
Priority date: 2022-05-25
Filing date: 2022-05-25
Publication date: 2022-10-18
Anticipated expiration: 2032-05-25

Abstract

The utility model relates to an embryo preservation auxiliary assembly technical field specifically is an electric piston liquid nitrogen transfer pump, including one end open-ended barrel, locate the inside piston of barrel and locate feed liquor pipe and the fluid-discharge tube of barrel closed end, all be equipped with the valve on feed liquor pipe and the fluid-discharge tube, the open end of barrel is equipped with the end plate, still include the driver part that the drive piston removed, driver part includes and has the internal screw thread cavity cock stem and install the motor on the end plate with fixed and the inner wall of piston, motor output end fixedly connected with and cock stem inner wall threaded connection's lead screw, the fixed engaging lug that is equipped with of cock stem lateral wall, be fixed with the slide bar of activity through-connection ear on the end plate, and slide bar and lead screw parallel arrangement. The utility model discloses well motor passes through the lead screw and drives cock stem and piston and remove in the barrel, realizes shifting the liquid nitrogen in the liquid nitrogen container to the save equipment in, utilizes the stable transmission cooperation between lead screw and the cock stem for the piston removes more stably, smoothly.

Description

Electric piston type liquid nitrogen transfer pump

Technical Field

The utility model relates to an embryo preservation auxiliary assembly technical field specifically is an electric piston formula liquid nitrogen transfer pump.

Background

In an embryo laboratory, when sperm, ovum, embryo and the like are preserved, liquid nitrogen is often required to be adopted for freezing preservation, the liquid nitrogen has certain volatility, the preserved liquid nitrogen needs to be supplemented regularly, and the amount of the liquid nitrogen is ensured to meet the requirement of embryo preservation.

The patent with the existing publication number of CN211174494U provides an electric piston type liquid nitrogen transfer pump, and it adopts the syringe structural style, is connected the pull rod and the rack of piston tail end for the rack can be connected with the interlock of gear, combines inlet, leakage fluid dram, first valve and the second valve of cylinder front end, accomplishes the liquid nitrogen and shifts the operation, and device simple structure is convenient for carry out the liquid nitrogen and shifts the operation in the laboratory, has reduced liquid nitrogen simultaneously and has shifted risk and cost. However, the electric piston type liquid nitrogen transfer pump completes the movement of the piston in the cylindrical barrel through the transmission matching of the rack and the gear, the meshed surface between the rack and the gear is small, and the rack is easy to bend under stress, so that the transmission stability is poor, and the phenomenon that the piston is difficult to move frequently occurs.

SUMMERY OF THE UTILITY MODEL

The utility model provides a not enough to prior art, the utility model provides an electric piston formula liquid nitrogen transfer pump can the piston remove more stably with smooth and easy, makes liquid nitrogen transfer work go on smoothly, has solved the piston in the current electric piston formula liquid nitrogen transfer pump and has easily appeared removing the problem of difficulty.

In order to achieve the above purpose, the utility model provides a following technical scheme: the utility model provides an electric piston type liquid nitrogen transfer pump, includes one end open-ended barrel, locates the inside piston of barrel and locates the feed liquor pipe and the fluid-discharge tube of barrel closed end, the feed liquor pipe with all be equipped with the valve on the fluid-discharge tube, the open end of barrel is equipped with the end plate, still including the drive the driver part that the piston removed, driver part include with the piston is fixed and the inner wall has the internal screw thread cavity cock stem and install in motor on the end plate, motor output end fixedly connected with the lead screw of cock stem inner wall threaded connection, the fixed engaging lug that is equipped with of cock stem lateral wall, be fixed with the activity on the end plate and run through the slide bar of engaging lug, just the slide bar with lead screw parallel arrangement.

Optionally, the cylinder body is of a double-layer vacuum-pumping structure, and the widths of the vacuum-pumping inner cavities of all parts of the cylinder body are consistent.

Optionally, the valve is a one-way valve, the valve medium on the liquid inlet pipe flows from the liquid inlet pipe into the cylinder, and the valve medium on the liquid discharge pipe flows from the cylinder into the liquid discharge pipe.

Optionally, the piston comprises a circular plate and a rubber ring embedded at the edge of the circular plate, the end face of the circular plate is fixed with the screw rod, and the outer side of the rubber ring is attached to the inner wall of the cylinder in an extruding manner.

Optionally, the barrel with install distance measuring sensor between the lead screw, just distance measuring sensor is infrared distance measuring sensor.

Optionally, the distance measuring sensor is mounted on an inner end face of one end, connected with the piston, of the cylinder, and the red light emitting direction of the distance measuring sensor is opposite to the center of the end face of the screw rod.

Compared with the prior art, the utility model provides an electric piston liquid nitrogen transfer pump possesses following beneficial effect:

1. the utility model discloses a set up the driver part who contains cock stem, motor, lead screw, engaging lug and slide bar, it is rotatory to drive the lead screw through the motor, utilizes the lead screw to drive cock stem and piston and removes in the barrel, realizes shifting the liquid nitrogen in the liquid nitrogen container to the storage device, because the transmission cooperation between lead screw and the cock stem is stable, makes the piston remove more stably, smoothly, avoids appearing the phenomenon that the piston removed the difficulty;

2. the cylinder body of the utility model adopts a double-layer vacuum pumping structure, so that the cylinder body has better heat preservation performance and can reduce the temperature loss of liquid nitrogen passing through the cylinder body;

3. the utility model discloses a establish the valve on feed liquor pipe and fluid-discharge tube into the check valve, the check valve can prevent liquid nitrogen reverse flow automatically, compares other control valves, has avoided the operating procedure of opening and close the valve, has reduced the operation degree of difficulty.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the piston and the driving member of the present invention;

fig. 3 is a schematic view of the main sectional structure of the present invention.

In the figure: 1. a barrel; 2. a piston; 20. a circular plate; 21. a rubber ring; 3. a liquid inlet pipe; 4. a liquid discharge pipe; 5. a valve; 6. a stopper rod; 7. a screw rod; 8. an end plate; 9. a motor; 10. a slide bar; 11. connecting lugs; 12. and a distance measuring sensor.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The embodiment is as follows: referring to fig. 1 to fig. 3, an embodiment of the present invention provides a technical solution: the utility model provides an electric piston type liquid nitrogen transfer pump, including one end open-ended barrel 1, locate 1 inside piston 2 of barrel and locate feed liquor pipe 3 and fluid-discharge tube 4 of 1 closed end of barrel, all be equipped with valve 5 on feed liquor pipe 3 and the fluid-discharge tube 4, the open end of barrel 1 is equipped with end plate 8, still include the driver part that drive piston 2 removed, driver part includes that it has internal screw thread cavity cock stem 6 and installs the motor 9 on end plate 8 with 2 fixed and inner wall of piston, motor 9 output end fixedly connected with cock stem 6 inner wall threaded connection's lead screw 7, cock stem 6 lateral wall is fixed and is equipped with engaging lug 11, be fixed with movable slide bar 10 that runs through engaging lug 11 on the end plate 8, and slide bar 10 and lead screw 7 parallel arrangement, be connected feed liquor pipe 3 with the liquid nitrogen storage equipment, fluid-discharge tube 4 is connected with the liquid nitrogen storage equipment, and through control feed liquor pipe 3, the order is opened and close to valve 5 on the fluid-discharge tube 4, and close through motor 9 drive lead screw 7 rotation, utilize lead screw 7 to drive cock stem 6 and piston 2 to move in barrel 1, can realize shifting the liquid nitrogen storage equipment in the liquid nitrogen storage equipment, because the transmission 7 and the smooth and easy transmission between the transmission piston 2 that makes the piston 2 removal appear that can avoid the piston 2 to more to appear to move.

On the basis of the above-mentioned embodiment, the barrel 1 of this embodiment is double-deck vacuum pumping structure, and the evacuation inner chamber width of each position of barrel 1 is unanimous, and double-deck vacuum pumping structure's barrel 1 has better heat preservation performance, can reduce the temperature loss through the liquid nitrogen in the barrel 1.

On the basis of the above embodiment, the valve 5 of this embodiment is a check valve, the medium flow direction of the valve 5 on the liquid inlet pipe 3 is from the liquid inlet pipe 3 to the cylinder body 1, the medium flow direction of the valve 5 on the liquid discharge pipe 4 is from the cylinder body 1 to the liquid discharge pipe 4, the check valve can automatically prevent the liquid nitrogen from flowing reversely, and compared with other control valves, the operation step of opening and closing the valve 5 is avoided, and the operation difficulty is reduced.

On the basis of the above embodiment, the piston 2 of the embodiment includes the circular plate 20 and the rubber ring 21 embedded at the edge of the circular plate 20, the end face of the circular plate 20 is fixed with the screw rod 7, the outer side of the rubber ring 21 is extruded and attached to the inner wall of the cylinder 1, the circular plate 20 mainly plays a supporting role, and the rubber ring 21 plays a sealing role, so that the sealing performance inside the closed end of the cylinder 1 is ensured, and the leakage of liquid nitrogen is prevented.

On the basis of the embodiment, a distance measuring sensor 12 is installed between the cylinder 1 and the screw rod 7, the distance measuring sensor 12 is an infrared distance measuring sensor, the distance measuring sensor 12 is installed on an inner end face of one end, connected with the piston 2, of the cylinder 1, the red light emitting direction of the distance measuring sensor 12 is right opposite to the center of the end face of the screw rod 7, after the distance measuring sensor 12 is connected with the motor 9 through an external controller, the distance measuring sensor 12 is used for measuring the moving distance of the piston 2 and the plug rod 6 relative to the screw rod 7 in real time, so that the opening, closing and rotating directions of the motor 9 are reasonably controlled through the external controller, and transfer of different amounts of liquid nitrogen is achieved.

The working principle is as follows: firstly, a liquid inlet pipe 3 is connected with a liquid nitrogen tank through a pipeline, meanwhile, a liquid discharge pipe 4 is connected with embryo preservation equipment through a pipeline, then, a motor 9 is controlled to rotate forwards, the motor 9 drives a plug rod 6 and a piston 2 to move towards the opening end of a cylinder 1 through a screw rod 7, at the moment, negative pressure is formed inside the closed end of the cylinder 1, liquid nitrogen in the liquid nitrogen tank is discharged into the cylinder 1 through the liquid inlet pipe 3, after the proper amount of liquid nitrogen enters the cylinder 1, the motor 9 is controlled to rotate reversely, the motor 9 drives the plug rod 6 and the piston 2 to move towards the closed end of the cylinder 1 through the screw rod 7, the liquid nitrogen in the cylinder 1 is discharged into the embryo preservation equipment through the liquid discharge pipe 4, so far, the transfer of the liquid nitrogen is completed, and in the liquid nitrogen transfer process, the connection transmission between the plug rod 6 and the screw rod 7 which drive the piston 2 to move is stable, the smooth and the stability of the movement of the piston 2 can be kept, and the phenomenon that the piston 2 is difficult to move is reduced.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An electronic piston liquid nitrogen transfer pump which characterized in that: including one end open-ended barrel (1), locate barrel (1) inside piston (2) and locate barrel (1) closed end's feed liquor pipe (3) and fluid-discharge tube (4), feed liquor pipe (3) with all be equipped with valve (5) on fluid-discharge tube (4), the open end of barrel (1) is equipped with end plate (8), still including the drive the driver part of piston (2) removal, driver part include with piston (2) are fixed and the inner wall have internal screw thread cavity gag lever post (6) and install in motor (9) on end plate (8), motor (9) output end fixedly connected with lead screw (7) of gag lever post (6) inner wall threaded connection, gag lever post (6) lateral wall is fixed and is equipped with engaging lug (11), be fixed with the activity on end plate (8) and run through slide bar (10) of engaging lug (11), just slide bar (10) with lead screw (7) parallel arrangement.

2. An electric piston liquid nitrogen transfer pump according to claim 1, characterized in that: the barrel (1) is of a double-layer vacuumizing structure, and the widths of vacuumizing inner cavities of all parts of the barrel (1) are consistent.

3. An electric piston liquid nitrogen transfer pump according to claim 1, characterized in that: the valve (5) is a one-way valve, the medium flow direction of the valve (5) on the liquid inlet pipe (3) is from the liquid inlet pipe (3) to the inside of the cylinder body (1), and the medium flow direction of the valve (5) on the liquid discharge pipe (4) is from the cylinder body (1) to the inside of the liquid discharge pipe (4).

4. An electric piston liquid nitrogen transfer pump according to claim 1, characterized in that: piston (2) include plectane (20) and inlay and locate plectane (20) marginal rubber ring (21), plectane (20) terminal surface with lead screw (7) are fixed, the rubber ring (21) outside with barrel (1) inner wall extrusion laminating.

5. An electric piston liquid nitrogen transfer pump according to claim 1, characterized in that: the distance measuring device is characterized in that a distance measuring sensor (12) is installed between the cylinder body (1) and the screw rod (7), and the distance measuring sensor (12) is an infrared distance measuring sensor.

6. An electric piston liquid nitrogen transfer pump according to claim 5, characterized in that: the distance measuring sensor (12) is arranged on the inner end face of one end, connected with the piston (2), of the cylinder body (1), and the red light emitting direction of the distance measuring sensor (12) is right opposite to the center of the end face of the screw rod (7).