CN202404080U - Continuous trace fluid infusion instrument - Google Patents

Abstract

The utility model relates to a liquid sampling device, which discloses a continuous trace dripping instrument. The continuous micro-injection instrument of the present utility model comprises a syringe and a syringe propulsion mechanism, and the syringe propulsion mechanism includes a cylinder body, a screw rod arranged inside the cylinder body, an indexing plate with a hollow chamber, and an indexing plate rotating unit; One end of the threaded rod is against the push rod of the syringe, and the other end is threadedly connected to the indexing plate rotation unit, and the indexing plate rotating unit rotates so that the indexing plate rotates and at the same time the threaded rod moves along its axial direction, This in turn pushes the syringe. One rotation of the index plate makes the displacement of the screw rod along its axial direction be 0.6 mm. The utility model can precisely adjust the propulsion amount of the syringe through the threaded connection of the screw rod and the rotating unit of the indexing plate. Ring, the application range of the agent propulsion is relatively large.

Description

Continuous Micro Droplet Apparatus

technical field

The utility model relates to a liquid sampling device, in particular to a continuous micro-dropping instrument used for measuring liquids in insect bioassay experiments and biochemical experiments.

Background technique

The micro-drop device is a precise micro-dose applicator, which can accurately control the dosing of the objects that need to be applied in the experiment. The micro-drop device can be widely used in chemical industry, petroleum, agriculture, pesticides, and forestry due to its precise and fine features. In the fields of ecology, ecology, etc., it is an indispensable instrument and equipment in the drop method experiment of insect bioassay in agriculture and forestry. Existing droppers generally include a syringe and a syringe propulsion device. The principle of the syringe propulsion device is the same as that of a micrometer. The syringe is pushed by rotating the micrometer, and the medicament contained in the syringe is quantitatively extruded, which is used for the drop method experiment of insect bioassay. .

Due to the high precision of the amount of medicine required in the drop method experiment of insect bioassay, and the ordinary micrometer push device cannot match the standard high-precision syringe, it is necessary to separately customize the syringe or purchase a special high-precision syringe from abroad. The cost is very high, resulting in a burden of experimental funding for small and medium-sized enterprises and institutions.

Utility model content

(1) Technical problems to be solved

The technical problem to be solved by the utility model is how to provide a continuous micro-injection instrument suitable for standard high-precision syringes to reduce costs.

(2) Technical solution

In order to solve the above-mentioned technical problems, the utility model provides a continuous micro-injection instrument, including a syringe and a syringe propulsion mechanism, and the syringe propulsion mechanism includes a cylinder body, a screw rod arranged inside the cylinder body, and an indexing plate with a hollow chamber , and an indexing plate rotation unit; one end of the screw rod is against the push rod of the syringe, and the other end is threadedly connected to the indexing plate rotating unit, and a first groove is opened on the axial direction of the screw rod guide rail, the cylinder is provided with a first positioning pin against the first groove guide rail to limit the rotation of the screw; to move, thereby pushing the plunger of the syringe.

Wherein, the displacement of the screw rod along its axial direction is 0.6mm when the indexing plate rotates one turn.

Wherein, the indexing disc rotation unit includes a hand wheel, a first stopper and a second stopper respectively arranged on both sides of the indexing disc and fixedly connected with the indexing disc; the indexing disc rotating unit and the The threaded connection of the screw rod is set in the first stopper, the first stopper is located on the side close to the syringe, and the other end of the second stopper is against the inner side of the barrel; the other end of the second stopper One end is fixedly connected with the handwheel.

Wherein, the indexing plate has multiple sets of positioning rings with different equal divisions, and the positioning rings are equally divided through positioning holes, and the second positioning pins with adjustable positions are arranged on the cylinder, and the second positioning rings The bottom of the pin has an elastic element, and the second positioning pin abuts against the positioning hole to identify the rotating position of the indexing plate.

Wherein, the indexing plate has 5 sets of positioning rings with different equal divisions.

Wherein, the positioning ring is divided into 2 equal parts, 5 equal parts, 10 equal parts, 20 equal parts or 40 equal parts.

Wherein, a positioning plate is provided on the circumference of the cylinder, and a through hole is opened in the positioning plate, and a connecting rod is arranged in the through hole, and a second groove guide rail is opened in the axial direction of the connecting rod, so that The through hole of the positioning disc is provided with a fourth positioning pin matching the second groove guide rail to limit the radial rotation of the connecting rod; one end of the connecting rod is provided with a locator, which has a The positioning pin matches the pin hole, and the elastic element is arranged in the pin hole.

Wherein, it also includes a syringe positioning mechanism, one end of the syringe positioning mechanism is provided with a slot, and the other end is fixed on the barrel, and the tube body of the syringe is installed on the slot.

Wherein, a liner is provided at the part where the clip groove is in contact with the tube body of the syringe.

Wherein, a base is also included, and the cylinder is fixedly installed on the base.

(3) Beneficial effects

The above-mentioned technical scheme provides a continuous micro-dropping device, which can precisely adjust the advance amount of the syringe through the threaded connection between the screw rod and the rotating unit of the indexing plate. The structure is simple and can be used for standard high-precision syringes, saving cost; further, the use of multi-divided positioning rings makes the application range of the medicine propulsion larger.

Description of drawings

Fig. 1 is the front view of the utility model's continuous micro-drop instrument;

Fig. 2 is a side view of the utility model's continuous trace dripping instrument;

Fig. 3 is the structural representation of screw mandrel of the present utility model;

Fig. 4 is the structural representation of the indexing plate of the present utility model;

Fig. 5 is a structural schematic diagram of the connecting rod of the present invention.

Among them, 1. Syringe; 2. Syringe propulsion mechanism; 3. Syringe positioning mechanism; 4. Base; 1-1, push rod; 2-10, barrel; 2-11, first positioning pin; Two positioning pins; 2-13, elastic element; 2-14, positioning plate; 2-15, connecting rod; 2-16, the second groove guide rail; 2-17, the fourth positioning pin; 2-18, locator ; 2-20, screw mandrel; 2-21, the first groove guide rail; 2-22, external thread; 2-30, indexing plate; 2-31, positioning ring; 2-32, positioning hole; 2-40 , indexing plate rotation unit; 2-41, hand wheel; 2-42, first limiter; 2-43, second limiter; 2-50, cylinder cover; 3-1, card slot; 3 -2. The third positioning pin; 3-3. Pad.

Detailed ways

Below in conjunction with accompanying drawing and embodiment, the specific embodiment of the utility model is described in further detail. The following examples are used to illustrate the utility model, but not to limit the scope of the utility model.

As shown in Fig. 1, a kind of continuous micro-drop instrument comprises syringe 1 and syringe propulsion mechanism 2, and this syringe propulsion mechanism 2 comprises cylinder body 2-10, is arranged on the screw rod 2-20 inside cylinder body 2-10 and has hollow cavity The index plate 2-30 of the chamber, and the index plate rotating unit 2-40. One end of the screw rod 2-20 is against the push rod 1-1 of the syringe 1, and the other end is threadedly connected with the dial rotation unit 2-40. The pitch of the thread can be adjusted precisely. The specific structure is as follows: 3. An external thread 2-22 is provided on the lead screw 2-20, and an internal thread matching the external thread 2-22 is provided in the indexing plate rotation unit 2-40. The screw rod 2-20 is provided with a first groove guide rail 2-21 in the axial direction, and the cylinder body 2-10 is provided with a first positioning pin 2-11 against the first groove guide rail 2-21. The presence of the pin 2-11 and the first grooved guide rail 2-21 limits the radial rotation of the screw shaft 2-20. While the indexing plate rotating unit 2-40 drives the indexing plate 2-30 to rotate, it also drives the screw rod 2-20 to move along its axial direction, thereby pushing the push rod 1-1 of the syringe 1. The continuous micro-drop instrument provided by the above-mentioned technical solution can precisely design the displacement of the screw rod 2-20 moving along its axial direction when the index plate 2-30 rotates one turn, and has a simple structure, low cost, and high processing accuracy. According to actual use The displacement can be adjusted by adjusting the pitch between the external thread 2-22 of the screw mandrel 2-20 and the internal thread of the indexing plate rotation unit 2-40. This embodiment is used for the drop method of insect bioassay In the experiment, the displacement is preferably 0.6mm, and the continuous micro-drop device is suitable for the existing standard high-precision syringes used in insect bioassay experiments, and makes the medicament propelling amount of the syringe 1 meet the accuracy of the drug dosage in insect bioassay experiments. Quantitative requirements.

The indexing plate rotating unit 2-40 of the present embodiment comprises a hand wheel 2-41, a first limiter 2-42 and Second stopper 2-43. Wherein, the threaded connection between the indexing plate rotation unit 2-40 and the screw rod 2-20 is set inside the first stopper 2-42, and the first stopper 2-42 is located on the side close to the syringe 1, the The other end of the first limiter 2-42 is against the inner side of the cylinder body 2-10 to limit the axial movement of the indexing plate rotation unit 2-40, and the other end of the second limiter 2-43 is in contact with the inner side of the cylinder body 2-10. The handwheel 2-41 is fixedly connected, the handwheel 2-41 is located outside the cylinder 2-10, the second limiter 2-43 is located inside the cylinder 2-10, and the cylinder 2-10 is located at the second limit The end of the device 2-43 is provided with a cylinder cover 2-50 connected by screws and nuts. Turning the handwheel 2-41 can drive the index plate 2-30 to rotate, and then make the screw rod 2-20 move along its axial direction and push the push rod 1-1 of the syringe 1.

In order to make this continuous micro-dropping instrument suitable for experiments with different drug doses, the index plate 2-30 of the present embodiment has multiple sets of positioning rings 2-31 of different equal divisions, as shown in Figure 4, the positioning ring 2-31 Through the positioning hole 2-32 to carry out equal division, the second positioning pin 2-12 with adjustable position is arranged on the cylinder 2-10, the bottom of the second positioning pin 2-12 is supported by the elastic element 2-13, according to For the selected positioning ring 2-31, adjust the position of the second positioning pin 2-12 to make it abut against the positioning hole 2-32, so as to distinguish the displacement of the indexing plate 2-30. Move the second locating pin 2-12 to the locating hole 2-32 of the locating ring 2-31 that is equally divided, and turn the hand wheel 2-41 to drive the index plate 2-30 to rotate. Next, the second locating pin 2-12 can jump from one locating hole 2-32 to another locating hole 2-32 when the index plate 2-30 rotates, and it can be judged when a slight snapping sound is heard. The second positioning pin 2-12 has arrived in the positioning hole 2-32.

As shown in Figure 4, the number of groups and equal fractions of the index plate 2-30 can be determined according to specific needs. The preferred design scheme is: five sets of positioning rings 2-31 can be set, and each set of positioning rings 2-31 is 2 grades respectively. points, 5 equal divisions, 10 equal divisions, 20 equal divisions and 40 equal divisions; the indexing plate 2-30 can also be provided with a group of positioning rings 2-31, wherein the positioning ring 2-31 with 5 equal divisions is better, and 5 equal divisions The equally divided positioning ring 2-31 is more suitable for manual operation and can obtain the propulsion amount of the medicament more accurately.

As shown in Fig. 1 and Fig. 5, a positioning plate 2-14 is provided on the circumference of the cylindrical body 2-10, and the positioning plate 2-14 has a through hole, and a connecting rod 2-15 is arranged in the through hole, and the connecting rod 2-15 A second groove guide rail 2-16 is provided in the axial direction, and a fourth positioning pin 2-17 matching the second groove guide rail 2-16 is provided at the through hole of the positioning disc 2-14, as shown in Figure 2, the The fourth positioning pin 2-17 limits the radial rotation of the connecting rod 2-15; one end of the connecting rod 2-15 is provided with a locator 2-18, and the locating device 2-18 has a function corresponding to the second positioning pin 2-12. For matching pin holes, the elastic element 2-13 is arranged at the bottom of the pin hole, and the second positioning pin 2-12 is installed in the pin hole, wherein the elastic element 2-13 can be a spring.

When the continuous micro-dropping instrument is in use, it can be easily carried by hand, or in order to push the syringe 1 more stably to obtain a more accurate drug propelling amount, so as to prevent errors caused by manual intervention, it is possible to add a Base 4, as Fig. 1 and Fig. 2, opens a base mounting hole at the lower end of the positioning plate 2-14 of cylinder body 2-10 periphery, cylinder body 2-10 is fixedly installed on the base 4 by connecting rod.

This embodiment also includes a syringe positioning mechanism 3, as shown in Figure 1, one end of the syringe positioning mechanism 3 is provided with a slot 3-1, the other end is fixed on the cylinder body 2-10, and the tube body of the syringe 1 is installed in the slot 3 On -1, a third positioning pin 3-2 is provided on the card slot 3-1, and the tube body of the syringe 1 is fixed on the card slot 3-1 through the third positioning pin 3-2. In order to prevent the tube body of the syringe 1 from being scratched, a liner 3-3 is provided at the position where the groove 3-1 contacts the tube body of the syringe 1 for protection, wherein the liner 3-3 can be a rubber ring.

In this embodiment, a standard high-precision syringe with a drug volume of 1000 microliters and a drug tube body length of 6 cm is selected as an example, and the displacement of the screw rod 2-20 moving along its axial direction when the indexing plate 2-30 rotates once is It is 0.6mm, and the positioning ring 2-31 of 2 equal divisions, 5 equal divisions, 10 equal divisions, 20 equal divisions and 40 equal divisions is used to make the displacements of advancing one equal division respectively: 0.3, 0.12, 0.06, 0.03, 0.015mm, the liquid volumes pushed out respectively are: 5, 2, 1, 0.5, 0.25 microliters, which meet the requirements of precise and quantitative drug dosage in the drop method experiment of insect bioassay. When using standard high-precision syringes with different volumes, such as 100 microliters, 500 microliters, 1000 microliters, 5000 microliters or 10000 microliters, the volume of liquid that can be squeezed out can be expanded or reduced according to the volume of the syringe.

The above is only the preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the utility model, some improvements and replacements can also be made. And replacement should also be regarded as the protection scope of the present utility model.

Claims (10)

1. A continuous micro-dropping instrument, comprising a syringe and a syringe propulsion mechanism, characterized in that, the syringe propulsion mechanism comprises a cylindrical body, a screw mandrel arranged inside the cylindrical body and a graduation plate with a hollow chamber, and a graduation Disk rotation unit; one end of the screw rod is against the push rod of the syringe, and the other end is threadedly connected with the indexing disk rotation unit, and a first groove guide rail is opened in the axial direction of the screw rod, and the The cylinder body is provided with a first positioning pin against the first groove guide rail to limit the rotation of the screw; the indexing plate rotating unit drives the indexing plate to rotate, and at the same time makes the screw move along its axial direction, and then Push the plunger of the syringe. 2. The continuous micro-drop device according to claim 1, wherein the displacement of the screw rod along its axial direction is 0.6 mm when the indexing plate rotates one turn. 3. The continuous micro-drop instrument according to claim 1, wherein the rotating unit of the indexing plate comprises a hand wheel, a first stopper which is respectively arranged on both sides of the indexing plate and fixedly connected with the indexing plate and the second limiter; the threaded connection between the indexing plate rotation unit and the screw rod is set in the first limiter, the first limiter is located on the side close to the syringe, and the other end of the limiter is against the The inner side of the cylinder; the other end of the second limiter is fixedly connected with the handwheel. 4. The continuous micro-drop device according to claim 1, wherein the index plate has multiple sets of positioning rings of different equal divisions, and the positioning rings are equally divided by positioning holes. There is a second positioning pin whose position can be adjusted. The bottom of the second positioning pin has an elastic element. The second positioning pin is against the positioning hole to identify the rotating position of the indexing plate. 5. The continuous micro-dropping apparatus according to claim 4, characterized in that, the indexing plate has 5 groups of positioning rings with different equal divisions. 6. The continuous micro-dropping apparatus according to claim 4, wherein the positioning ring is divided into 2 equal parts, 5 equal parts, 10 equal parts, 20 equal parts or 40 equal parts. 7. The continuous trace dripping instrument as claimed in claim 4, wherein a positioning disc is provided on the circumference of the cylindrical body, and a through hole is provided on the positioning disc, and a connecting rod is provided in the through hole, so that There is a second groove guide rail on the axial direction of the connecting rod, and a fourth positioning pin matching the second groove guide rail is provided at the through hole of the positioning disc to limit the radial rotation of the connecting rod; A locator is provided at one end of the connecting rod, and the locator has a pin hole matched with the second positioning pin, and the elastic element is arranged in the pin hole. 8. The continuous micro-dropping device according to claim 1, further comprising a syringe positioning mechanism, one end of the syringe positioning mechanism is provided with a draw-in groove, and the other end is fixed on the cylindrical body, and the tubular body of the syringe Installed on the card slot. 9. The continuous micro-dropping apparatus according to claim 8, characterized in that, a liner is provided at the position where the draw-in groove contacts the tube body of the syringe. 10. The continuous micro-dropping apparatus according to claim 1, further comprising a base, the cylinder body is fixedly installed on the base.

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