Lateral outlet injector with motor stirring function

Abstract

The utility model belongs to the technical field of energetic material granulation in the droplet microfluidic technology, and discloses a lateral outlet injector with a motor stirring function, which comprises a needle cylinder, one end of the needle cylinder is connected with an end cover, a piston is slidably connected in the needle cylinder, the piston is connected with a push rod, and the push rod is connected with a motor. The end, away from the end cover, of the needle cylinder is rotationally connected with a transmission shaft, one end of the transmission shaft is detachably connected with a stirring paddle, the stirring paddle is located between the piston and the bottom wall of the needle cylinder, and the other end of the transmission shaft penetrates through the bottom wall of the needle cylinder and is connected with a driving device. The transmission shaft is hermetically connected with the needle cylinder through an oil seal; a lateral outlet is formed in the side wall of the needle cylinder; the problems that an existing injector is complex in transmission structure and cannot effectively restrain suspension liquid sedimentation are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of energetic material granulation using droplet microfluidic technology, in particular to a lateral outlet syringe with a motor stirring function. Background Art

[0002] The essence of droplet microfluidics is to disperse a liquid into another immiscible liquid or gas to form a tiny volume unit. The liquid that forms the droplets is called the discrete phase. Microdroplets have good size uniformity and monodispersity, which are suitable for the spherical granulation of energetic materials. In the microfluidic spherical granulation process, the method is: dissolve the polymer material in an appropriate solvent, then add the energetic material particles, and mix them thoroughly under certain stirring or ultrasound to form a stable suspension; then suck the suspension into the syringe, and place the carrier syringe on the cross-flow syringe pump, and finally set the syringe pump parameters to push the carrier syringe at a uniform speed, and then push the suspension into the droplet production unit at a uniform speed, forming a suspension droplet with uniform composition and uniform particle size, which will eventually solidify in the channel to form spherical particles.

[0003] In order to obtain uniform suspension droplets, the stable state of the suspension in the syringe is crucial. Usually the microfluidic preparation process takes a long time, and the suspension is extremely easy to settle. Especially when the particle size and mass of the energetic material particles are large, the suspension settles faster. Therefore, the granulation of liquid fluidic technology is limited to nano energetic materials (particle size <1um), making this technology unable to sphericalize and coat large energetic materials (particle size greater than 1um). The sedimentation of the suspension in the syringe leads to uneven formation of the components of the suspension droplets, which in turn leads to uneven granulation components, affecting the consistency and reproducibility of the performance of the composite energetic material.

[0004] In order to solve the problem of uneven suspension in the above syringe, researchers have taken many measures, such as: adding magnets to the syringe for magnetic stirring to inhibit the sedimentation of the suspension; embedding ultrasonic units in the syringe piston module to ultrasonically vibrate the fluid to inhibit sedimentation. However, these methods have some shortcomings: the spatial position of the magnetic stirring magnets cannot be arbitrarily adjusted, the magnetic transmission may stall, and the transmission structure is complex. These shortcomings may lead to local suppression of sedimentation and cannot effectively suppress the sedimentation of the suspension. Utility Model Content

[0005] The utility model aims to provide a side outlet syringe with a motor stirring function, so as to solve the problem that the existing syringe transmission structure is complicated and cannot effectively inhibit the sedimentation of the suspension.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] The basic technical solution provided by the utility model is:

[0008] A side outlet syringe with a motor stirring function comprises a syringe, one end of the syringe is connected to an end cap, a piston is slidably connected inside the syringe, a push rod is connected to the piston, the end of the syringe away from the end cap is rotatably connected to a transmission shaft, one end of the transmission shaft is detachably connected to a stirring paddle, the stirring paddle is located between the piston and the bottom wall of the syringe, the other end of the transmission shaft passes through the bottom wall of the syringe and is connected to a driving device, and the transmission shaft and the syringe are sealed by an oil seal; a side outlet is provided on the side wall of the syringe.

[0009] Principles of basic technical solutions:

[0010] The piston and the push rod are used to absorb the prepared suspension or push the suspension in the syringe into the droplet production unit; the driving device drives the rotating shaft to rotate, and the transmission shaft drives the stirring paddle to rotate and stir the suspension to prevent the suspension from settling.

[0011] The beneficial effects of the basic technical solution are:

[0012] The suspension is stirred by a motor, a transmission shaft and a stirring paddle, which is suitable for high-viscosity fluids and suspensions containing large solid particles, and can effectively inhibit the sedimentation of the suspension; the length of the transmission shaft in the syringe can be adjusted as needed to achieve the best stirring effect; the device has a simple structure and is easy to manufacture and use.

[0013] Preferably, the driving device is a motor, the motor is connected to a power supply, the transmission shaft is detachably connected to the output end of the motor via a connecting slot; the stirring paddle is connected to the transmission shaft via a threaded connection or a key connection.

[0014] Through the above arrangement, the transmission shaft and the motor are detachably connected through the connecting slot, which makes it easy to remove the transmission shaft from the motor; the stirring paddle and the transmission shaft are connected by threads or keys, which makes it easy to replace the stirring paddle and is easy to use.

[0015] Preferably, the connecting slot is a round tube, a groove is provided on the inner wall of the round tube, and a buckle matched with the groove is provided at a corresponding position on the transmission shaft.

[0016] Through the above arrangement, the rotating shaft and the motor are connected through the groove in the round tube and the buckle on the transmission shaft, which makes disassembly convenient and the connection stable.

[0017] Preferably, the lateral outlet is connected to a Luer connector; the syringe is made of glass, the push rod is made of stainless steel, and the piston and the oil seal are made of polytetrafluoroethylene.

[0018] Through the above arrangement, a Luer connector is connected to the side outlet, which is convenient for matching with a conventional connection needle; glass and stainless steel raw materials are easy to obtain and low in price, reducing manufacturing costs; the materials of the piston and the oil seal are both polytetrafluoroethylene, which can effectively prevent corrosion from organic solvents. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of a side-outlet syringe with a motor stirring function according to the utility model;

[0020] Figure 2 This is a schematic diagram of the structure of a drive shaft and a connecting slot of a side-outlet syringe with a motor stirring function according to the utility model;

[0021] The names of the corresponding marks in the accompanying drawings are:

[0022] Syringe 1, Luer connector 11, push rod 2, handle 21, piston 22, transmission shaft 3, buckle 31, stirring paddle 32, oil seal 33, connecting slot 4, groove 41, motor 5, power supply 6. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below in conjunction with the accompanying drawings and implementation examples:

[0024] like Figure 1 to Figure 2 As shown, a side outlet syringe with a stirring function of a motor 5 comprises a syringe 1 made of glass, one end of the syringe 1 is connected to an end cap 12, a piston 22 made of polytetrafluoroethylene is slidably connected in the syringe 1, a push rod 2 made of stainless steel is connected to the piston 22, and a handle 21 made of stainless steel is connected to the push rod 2 at one end away from the syringe 1; a transmission shaft 3 is rotatably connected to the end of the syringe 1 away from the end cap 12, one end of the transmission shaft 3 is connected to a stirring paddle 32 through a threaded connection or a key, the stirring paddle 32 is located between the piston 22 and the bottom wall of the syringe 1, and the number of blades of the stirring paddle 32 is two, three or four; the other end of the transmission shaft 3 The end passes through the bottom wall of the syringe 1 and is connected to a driving device, which is a motor 5, and the motor 5 is connected to a power supply 6. The transmission shaft 3 is detachably connected to the output end of the motor 5 through a connecting slot 4, and the connecting slot 4 is a round tube with a groove 41 on the inner wall of the round tube. A buckle 31 is provided at a corresponding position on the transmission shaft 3, and the transmission shaft 3 and the syringe 1 are sealed and connected through an oil seal 33 made of polytetrafluoroethylene; a lateral outlet is provided on the side wall of the syringe 1, and the lateral outlet is connected to a Luer connector 11; in this embodiment, the inner diameter of the syringe 1 is 2 to 4 cm, the diameter range of the stirring paddle 32 is 1.5 to 3 cm, and the rotation speed of the motor 5 is 1 to 1000 rpm.

[0025] The specific implementation process is as follows:

[0026] The prepared suspension is sucked into the syringe, and then the transmission shaft 3 is connected to the output end of the motor 5, the syringe and the motor 5 are fixed, and the transmission shaft 3 is kept coaxial with the syringe 1, and the stirring speed of the motor 5 is set to stir.

[0027] Among them, the suspension is stirred by using a motor 5, a transmission shaft 3 and a stirring paddle 32, which can be suitable for high-viscosity fluids and suspensions containing large solid particles, and can effectively inhibit the sedimentation of the suspension; the length of the transmission shaft 3 in the syringe 1 can be adjusted as needed to achieve the best stirring effect; the device has a simple structure and is easy to manufacture and use; the transmission shaft 3 and the motor 5 are detachably connected through a connecting slot 4, which is convenient for removing the transmission shaft 3 from the motor 5; the stirring paddle 32 and the transmission shaft 3 are connected by threads or keys, which is convenient for replacing the stirring paddle 32 and is easy to use.

[0028] The above is only an embodiment of the utility model, and the common knowledge such as the known specific technical scheme or characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the technical scheme of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A side outlet syringe with motor stirring function, characterized in that: The invention comprises a syringe (1), one end of which is connected to an end cover (12), a piston (22) being slidably connected inside the syringe (1), a push rod (2) being connected to the piston (22), an end of the syringe (1) away from the end cover (12) being rotatably connected to a transmission shaft (3), one end of the transmission shaft (3) being detachably connected to a stirring paddle (32), the stirring paddle (32) being located between the piston (22) and the bottom wall of the syringe (1), the other end of the transmission shaft (3) passing through the bottom wall of the syringe (1) being connected to a driving device, and the transmission shaft (3) and the syringe (1) being sealed by an oil seal (33); a lateral outlet is provided on the side wall of the syringe (1).

2. The side outlet syringe with motor stirring function according to claim 1, characterized in that: The driving device is a motor (5), the motor (5) is connected to a power source (6), the transmission shaft (3) is detachably connected to the output end of the motor (5) via a connecting slot (4); the stirring paddle (32) is connected to the transmission shaft (3) via a threaded connection or a key connection.

3. The side outlet syringe with motor stirring function according to claim 2, characterized in that: The connecting slot (4) is a round tube, a groove (41) is provided on the inner wall of the round tube, and a buckle (31) matched with the groove (41) is provided at a corresponding position on the transmission shaft (3).

4. The side outlet syringe with motor stirring function according to claim 1, characterized in that: The side outlet is connected to a Luer connector (11); the material of the syringe (1) is glass, the material of the push rod (2) is stainless steel, and the material of the piston (22) and the oil seal (33) are both polytetrafluoroethylene.

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