CN205181908U - High efficiency syringe pump - Google Patents

Abstract

A high-efficiency syringe pump, comprising a linear stepper motor, a slider, a piston, a piston sleeve, a grating, an electric control box and a frame, the frame includes a frame body and a linear bearing, and the frame body Three through holes are opened on the top, the first hole and the third hole on both sides of the three holes have the same structure, the second hole in the middle is manufactured according to the shape of the linear motor, and the linear bearing is installed in the first hole and the second hole Inside, the piston core rod passes through the linear bearing and is screwed to the slider, and the first end of the grating is fixed on the frame and the other end is fixed on the slider. A high-efficiency syringe pump, which uses a linear motor instead of a stepper motor and a screw nut mechanism, so that the syringe pump has higher precision, efficiency and accuracy stability, and can conveniently and quickly replace the required injection specifications according to user needs , to ensure greater injection accuracy, the two pistons can use different specifications when taking liquid at the same time, so as to achieve the purpose of taking two different amounts of liquid at the same time, and further improve the efficiency of the syringe pump.

Description

A high-efficiency syringe pump

technical field

The utility model belongs to the field of liquid sampling, in particular to a high-efficiency injection pump.

Background technique

Syringe pumps are mostly used in drug injection, liquid sampling and other fields. At present, the rotary motor of the syringe pump is converted into linear motion through the screw nut mechanism, resulting in low precision of the syringe pump. Some syringe pumps have added a deceleration device to ensure the accuracy. This type of syringe pump The injection speed of the injection pump is very slow, cleaning and rinsing will waste a lot of time, and the processing precision of the transmission device is very high, the accuracy of the injection pump is unstable, and the retention is poor; in addition, the existing industrial injection pumps are generally purchased according to specifications. When different specifications are used, larger specifications are selected, which leads to poor accuracy when the dosage is small.

Contents of the invention

In order to solve the above problems, the utility model provides a high-efficiency syringe pump.

The technical scheme of the utility model is as follows:

A high-efficiency syringe pump, comprising a linear stepper motor, a slider, a piston, a piston sleeve, a grating, an electric control box and a frame, the frame includes a frame body and a linear bearing, and the frame body Three through holes are opened on the top, the first hole and the third hole on both sides of the three holes have the same structure, the second hole in the middle is manufactured according to the shape of the linear motor, and the linear bearing is installed in the first hole and the second hole Inside, the piston core rod passes through the linear bearing and is screwed to the slider, and the first end of the grating is fixed on the frame and the other end is fixed on the slider.

The structure of the first hole and the second hole is that the first end is a small hole and the second end is a large hole, wherein a section of thread is tapped on the large hole.

The piston includes a piston cylinder, a piston sleeve, a piston head, and a piston core rod. The outer surface of the piston cylinder is tapped with threads, and is manufactured into various specifications according to the capacity.

The piston head is made into various types according to the specifications of the piston barrel, and the piston head of each specification can be installed on the same piston core rod.

The inner and outer surfaces of the piston sleeve have a gradient, that is, the outer diameter of the first end is smaller than the outer diameter of the second end, and the second end is tapped with a section of thread, so that the piston sleeve can be tightened in the first hole or the second hole of the frame. On the large hole of the hole, and its inner surface is also made into various hole diameters according to the specifications, so that the piston cylinders of different specifications can be screwed on the piston sleeve.

Both ends of the piston core rod are tapped with threads, the first end is screwed on the slider and the second end is used to screw the piston head, and the first end is milled with two parallel planes at a certain distance from the end face, when the piston is removed The piston head can be replaced by unscrewing the piston core rod after removing the cylinder.

The syringe pump is a double-pump structure, which can be used to inject different amounts of liquid, and when the injection volume is small, the precision is higher, and the two pistons can adopt different specifications when taking the liquid at the same time, so that two kinds of liquids can be taken at the same time. Purpose of different amounts of liquid.

The beneficial effects of the utility model are: a high-efficiency injection pump, which uses a linear motor instead of a stepping motor and a screw nut mechanism, so that the injection pump has higher precision, efficiency and precision stability, and can be conveniently, Quickly change the required injection specifications to ensure greater injection accuracy. When taking liquid at the same time, the two pistons can use different specifications to achieve the purpose of taking two different amounts of liquid at the same time, which further improves the efficiency of the syringe pump. .

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a three-dimensional exploded view of the utility model.

Fig. 3 is a partial sectional view of the frame structure.

Fig. 4 is a schematic diagram of the structure of the piston core rod.

Fig. 5 is a schematic diagram of the structure of the piston barrel.

Fig. 6 is a schematic structural view of the piston sleeve.

detailed description

The utility model is further described as follows in conjunction with Fig. 1-Fig. 6:

A high-efficiency syringe pump mainly includes a linear stepping motor 101, a piston 102, a grating 103, a frame 104, a slider 105 and an electric control box 106, and the piston includes a piston barrel 201, a piston sleeve 202, and a piston head 203 , Piston core rod 204, described frame 104 comprises frame frame body 301 linear bearing 302, it is characterized in that: described frame frame body 301 has opened three through holes, the first hole on both sides in the three holes The structure of the third hole is the same, the second hole in the middle is manufactured according to the shape of the linear motor 101, the linear bearing 302 is installed in the first hole and the second hole, and the piston core rod 204 passes through the linear bearing 302 and is threaded Connected to the slider 105 , the first end of the grating 103 is fixed on the frame and the second end is fixed on the slider 105 .

The structure of the first hole and the second hole is that the first end is a small hole and the second end is a large hole, wherein a thread is tapped on the large hole.

The piston includes a piston barrel 201, a piston sleeve 202, a piston head 203, and a piston core rod 204. The outer surface of the piston barrel 201 is tapped with threads, and is manufactured into various specifications according to the capacity.

The outer surface of the piston sleeve 202 has a gradient, that is, the outer diameter of the first end is smaller than the outer diameter of the second end, and the second end is tapped with a section of thread, so that the piston sleeve 202 can be tightened on the frame body 301. On the large hole of the first hole or the second hole, and its inner surface is manufactured according to the specifications of the piston cylinder 201, so that the piston cylinder 201 of different specifications can be screwed on the piston sleeve 202.

The piston head 203 is manufactured in various types according to the specifications of the piston barrel 201 , and the piston head 203 of each specification can be installed on the same type of piston core rod 204 .

Both ends of the piston core rod 204 are tapped with threads, the first end is screwed on the slider and the second end is used to screw the piston head 203, and two parallel planes are milled on the first end near the end surface at a certain distance, so that the piston The installation and disassembly of the core rod 204 is more convenient, and the piston head 203 can be replaced by unscrewing the piston core rod 204 after the piston cylinder 202 is taken off.

The syringe pump is a double-pump structure, and the syringe pump can be used to inject different amounts of liquid, and when the injection volume is small, the precision is higher, and the two pistons 102 can adopt different specifications when taking the liquid at the same time, so that two pistons 102 can be taken at the same time. The purpose of different amounts of liquid.

When installing the injection pump, the linear bearing 302 is installed in the small hole of the first hole and the second hole of the frame body 301, the linear motor 101 is installed on the second hole of the frame 104, and the slider 105 is fixed on the linear On the motor shaft of the motor 101, and can slide on the frame 104, install the piston head 203 on the piston core rod 204, then pass the piston core rod 204 through the inner hole of the linear bearing 301 of the frame 104 and screw it on the slider On 105, the piston sleeve 202 is screwed into the first hole or the large hole of the second hole until it is tightened, and the piston sleeve 201 (except for the largest specification directly screwed inside and outside the large hole) is screwed into the piston sleeve 202 until it is tightened, and finally installed The grating 103 and the electric control box 106 are connected with lines.

When the piston 102 needs to be replaced, the piston sleeve 202 and the piston cylinder 201 are taken off, the piston core rod 204 is unscrewed from the slide block 105 with a tool, the piston head 203 on the piston core rod 204 is replaced, and finally the new specification is installed. Piston sleeve 202 and piston cylinder 201.

Claims (4)

1. A high-efficiency syringe pump, mainly including a linear stepping motor (101), a piston (102), a grating (103), a frame (104), a slider (105) and an electric control box (106), the The piston includes a piston cylinder (201), a piston sleeve (202), a piston head (203), and a piston core rod (204), and the frame (104) includes a frame body (301) and a linear bearing (302). It is characterized in that three through holes are opened on the frame body (301), the first hole and the third hole on both sides of the three holes have the same structure, and the second hole in the middle follows the shape of the linear motor (101) manufacturing, the linear bearing (302) is installed in the first hole and the second hole, the piston core rod (204) passes through the linear bearing (302) and is connected to the slider (105) by threads, and the grating (103 ) the first end is fixed on the frame and the second end is fixed on the slider (105). 2. A high-efficiency syringe pump according to claim 1, characterized in that: inside the large hole of the first hole and the second hole, the two ends of the piston core rod (204) and the inside and outside of the piston sleeve (202) The surface is tapped with a thread. 3. A high-efficiency syringe pump according to claim 1 or 2, characterized in that: the piston barrel (201), piston sleeve (202) and piston head (203) are all manufactured in various specifications according to capacity . 4. A high-efficiency syringe pump according to claim 1 or 2, characterized in that: the first end of the piston core rod (204) is screwed on the slider (105) and the second end is used to screw the piston head ( 203), and two parallel planes are milled at a certain distance from the first end face.