Microbiological test liquid injection device

Abstract

The utility model relates to the technical field of microbiology research, and discloses a microbiological test liquid injection device which comprises a sealing pipe, a liquid injection pipe is fixedly connected to the inner wall of the sealing pipe, a rubber piston is slidably connected to a cavity of the inner wall of the liquid injection pipe, a push rod is fixedly connected to the top end of the rubber piston, and a liquid injection head is arranged at the bottom of the liquid injection pipe. An L-shaped sliding rod is fixedly connected to the right side of the exterior of the push rod, a protective shell is fixedly connected to the right side of the exterior of the sealing pipe, a limiting block is slidably connected to the inner wall of the protective shell, and a limiting spring is fixedly connected to the bottom of the limiting block. According to the quantitative liquid injection device, quantitative liquid injection during microbiological test liquid injection is achieved, the accuracy of experimental data is ensured, meanwhile, the liquid injection pipe is cleaned in the experimental process or after the experimental process is finished, the service life of the liquid injection pipe is prolonged, cross contamination in the experimental process is prevented, and the experimental efficiency and the accuracy of the experimental data are greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of microbiology research, in particular to a liquid injection device for microbiology testing. Background Art

[0002] Microbiological testing refers to the process of conducting experiments or research using microorganisms, usually used to explore the physiological characteristics, metabolic pathways, pathogenic mechanisms, antimicrobial sensitivity, etc. of microorganisms. Microbiological testing injection is also a very important part of it. Microbiological testing injection is a process used to accurately inject liquid samples (such as culture media, antibiotic solutions, etc.) into culture dishes, test tubes or other containers for microbiological experiments.

[0003] After searching, the existing Chinese patent announcement number is: CN220467976U, which discloses a microbial test injection device, including a weighing unit, a pumping unit and a fixing unit. The weighing unit is communicatively connected to the pumping unit. The fixing unit includes two elastic support plates arranged at a relative interval, and adhesive fasteners respectively arranged on each elastic support plate facing the other elastic support plate. The two elastic support plates are both arranged on the weighing unit; during the test, the two elastic support plates can be manually pressed close to each other, so that the adhesive fasteners located on the two elastic support plates are respectively adhesively fixed to the outer surfaces of the opposite sides of the sterile sampling bag, and then the two elastic support plates are released to make the two elastic support plates rebound and reset. During the rebound process, the two elastic support plates can pull open the self-sealing strip of the sterile sampling bag and directly fix the sterile sampling bag after opening, thereby avoiding the risk of contamination caused by the operator touching the inner area of ​​the sterile sampling bag to open the sterile sampling bag.

[0004] The above patent mentioned in the specification that "the weighing unit 100 is then used to weigh the mass of the microbial sample in the sterile sampling bag, and the pumping unit 200 is controlled to pump an appropriate amount of auxiliary solution into the sterile sampling bag according to the quality of the microbial sample." However, during the specific use process, other solutions will remain inside when the pumping unit is repeatedly used, resulting in an inaccurate mixing ratio, causing cross-contamination between samples, and affecting the experimental efficiency and the accuracy of the experimental data. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a microbiological test liquid injection device, aiming to improve the problem that the prior art cannot perform liquid injection quantitatively.

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

[0007] The microbiological test liquid injection device comprises a sealing tube, the inner wall of the sealing tube is fixedly connected with a liquid injection tube, the inner wall cavity of the liquid injection tube is slidably connected with a rubber piston, the top of the rubber piston is fixedly connected with a push rod, the bottom of the liquid injection tube is provided with an injection head, the outer right side of the push rod is fixedly connected with an L-shaped sliding rod, the outer right side of the sealing tube is fixedly connected with a protective shell, the inner wall of the protective shell is slidably connected with a limiting block, the bottom of the limiting block is fixedly connected with a limiting spring, a card slot is provided on the outer right side of the protective shell, a fixed plate is fixedly connected with the outer right side of the protective shell, a rotating column is fixedly connected with a U-shaped plate on the adjacent side of the two fixed plates, the rotating column is rotatably connected with the outside of the U-shaped plate, the left end of the U-shaped plate is fixedly connected with a buckle spring, the left end of the U-shaped plate is provided with a U-shaped groove, the inner wall of the U-shaped plate is rotatably connected with the limiting column, the limiting column is fixedly connected with a card plate, and the left side of the sealing tube is fixedly connected with a cleaning component.

[0008] Furthermore, the cleaning assembly includes an infusion tube, a rotary valve, a bead and a cleaning tube, one end of the infusion tube is fixedly connected to the outside of the left end of the sealing tube and extends to the injection tube, the outside of the rotary valve is rotatably connected to the front end of the infusion tube, the outside of the bead is rotatably connected to the inner wall of the infusion tube, and the other end of the infusion tube is fixedly connected to the outside right side of the cleaning tube.

[0009] Furthermore, the outside of the injection head is fixedly connected to the bottom of the sealing tube and extends outward, and the bottom end of the L-shaped sliding rod is fixedly connected to the top of the limiting block.

[0010] Furthermore, the outer portion of the limit block is slidably connected to the inner wall of the protective shell, and the bottom end of the limit spring is fixedly connected to the bottom of the protective shell.

[0011] Furthermore, the left side of the snap spring is fixedly connected to the outer right side of the protective shell, the bottom of the U-shaped plate is in contact with the outer right side of the protective shell, the right side of the card plate is in contact with the inner wall of the U-shaped plate, and a U-shaped groove is opened on the outer right side of the L-shaped slide rod.

[0012] Furthermore, the L-shaped sliding rod is slidably connected to the inner wall at the top of the protective shell, and the push rod is externally slidably connected to the inner wall at the top of the sealing tube and extends to the inner wall at the top of the injection tube.

[0013] Furthermore, the rear end of the rotary valve is fixedly connected to the front end of the clamping bead, and a through hole is arranged on the outside of the clamping bead.

[0014] The utility model has the following beneficial effects:

[0015] 1. In the utility model, through the cooperation of the buckle spring, U-shaped plate, card plate, L-shaped slide bar, limit block, limit spring and other structures, the requirement of quantitative injection during injection is realized, the liquid volume is accurately controlled and measured, and the accuracy, repeatability and reliability of the experiment are ensured.

[0016] 2. In the utility model, through the mutual cooperation of the cleaning tube, the infusion tube, the rotating valve, the card bead and other structures, the infusion tube can be opened and closed, and the injection tube can be cleaned. The clean injection tube can prevent cross contamination between samples, reduce errors in the experiment, extend its service life, and greatly improve the experimental efficiency and the accuracy of the experimental data. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional diagram of the microbiological test liquid injection device proposed by the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the injection pipe of the microbial test injection device proposed by the utility model;

[0019] Figure 3 This is a schematic diagram of the cardboard structure of the microbial test liquid injection device proposed by the utility model;

[0020] Figure 4 The utility model is a schematic diagram of the rotary valve structure of the microbiological test liquid injection device.

[0021] Legend:

[0022] 1. Sealing tube; 2. Injection tube; 3. Rubber piston; 4. Push rod; 5. Rotating column; 6. Injection head; 7. Slot; 8. L-shaped slide bar; 9. Limit block; 10. Limit spring; 11. Protective shell; 12. Buckle spring; 13. U-shaped plate; 14. Fixed plate; 15. Limit column; 16. Card plate; 17. Cleaning tube; 18. Infusion tube; 19. Rotating valve; 20. Card bead. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Reference Figure 1-Figure 3The utility model provides an embodiment of a microbial test injection device, including a sealing tube 1, an injection tube 2 is fixedly connected to the inner wall of the sealing tube 1, the sealing tube 1 mainly protects and seals the liquid in the injection tube 2, a rubber piston 3 is slidably connected to the inner wall cavity of the injection tube 2, and a push rod 4 is fixedly connected to the top of the rubber piston 3. By pushing the push rod 4, the rubber piston 3 is driven to slide in the cavity of the injection tube 2 to push the microbial liquid in the injection tube 2. An injection head 6 is provided at the bottom of the injection tube 2, and the microbial liquid is injected and output through the injection head 6. An L-shaped slide bar 8 is fixedly connected to the outer right side of the push rod 4. The push rod 4 moves up and down while driving the L-shaped slide bar 8 to move up and down. A protective shell 11 is fixedly connected to the outer right side of the sealing tube 1, and a limiting block 9 is slidably connected to the inner wall of the protective shell 11, so that the limiting block 9 slides on the inner wall of the protective shell 11, and a limiting spring is fixedly connected to the bottom of the limiting block 9 The upper and lower ends of the U-shaped plates 13 are fixedly connected to the upper and lower ends of the U-shaped plates 13, and the lower and upper ends of the U-shaped plates 13 are fixedly connected to the upper and lower ends of the U-shaped plates 13. The lower and upper ends of the U-shaped plates 13 are fixedly connected to the upper and lower ends of the U-shaped plates 13, and the lower and upper ends of the U-shaped plates 13 are pressed by pressing the U-shaped plates 13. The U-shaped plates 13 are rotated on the rotating columns 5. The left end of the U-shaped plates 13 is provided with a U-shaped groove. The inner wall of the U-shaped plates 13 is rotatably connected to the limiting columns 15. The limiting columns 15 are fixedly connected to the outer sides of the limiting columns 15. The limiting columns 15 are folded and unfolded to realize the storage of the limiting columns 16. The left side of the sealing tube 1 is fixedly connected to a cleaning component.

[0025] Reference Figure 3-Figure 4 The cleaning component includes an infusion tube 18, a rotating valve 19, a card bead 20 and a cleaning tube 17. One end of the infusion tube 18 is fixedly connected to the outside of the left end of the sealing tube 1 and extends to the injection tube 2. The infusion tube 18 is fixed to facilitate infusion. The rotating valve 19 is externally rotatably connected to the front end of the infusion tube 18, and the card bead 20 is externally rotatably connected to the inner wall of the infusion tube 18. The other end of the infusion tube 18 is fixedly connected to the right side of the outside of the cleaning tube 17. The rotating valve 19 is rotated to drive the card bead 20 to rotate in the infusion tube 18, so as to open and close the channel of the infusion tube 18.

[0026] Reference Figure 1-Figure 4The injection head 6 is externally fixedly connected to the bottom of the sealing tube 1 and extends outward to improve the sealing and stability during injection. The bottom end of the L-shaped slide bar 8 is fixedly connected to the top of the limit block 9. The L-shaped slide bar 8 pushes the limit block 9 to slide up and down. The limit block 9 is externally slidably connected to the inner wall of the protective shell 11, so that the limit block 9 is on the inner wall of the protective shell 11. The bottom end of the limit spring 10 is fixedly connected to the bottom of the protective shell 11 to fix the limit spring 10. The left side of the snap spring 12 is fixedly connected to the right side of the outside of the protective shell 11. The protective shell 11 supports the snap spring 12. The U-shaped plate The bottom of 13 is in contact with the right side of the outside of the protective shell 11, the right side of the card plate 16 is in contact with the inner wall of the U-shaped plate 13, a U-shaped groove is opened on the right side of the outside of the L-shaped slide bar 8 to limit the L-shaped slide bar 8, the L-shaped slide bar 8 is slidably connected to the top inner wall of the protective shell 11, the L-shaped slide bar 8 slides inside the protective shell 11, the push rod 4 is externally slidably connected to the top inner wall of the sealing tube 1 and extends to the top inner wall of the injection tube 2, the rear end of the rotary valve 19 is fixedly connected to the front end of the card bead 20, and the card bead 20 is rotated by rotating the rotary valve 19, and a through hole is provided on the outside of the card bead 20.

[0027] Working principle: first push the push rod 4 downward, the bottom of the push rod 4 is fixedly connected to a rubber piston 3, thereby driving the rubber piston 3 to slide in the internal cavity of the injection tube 2, so that the microbial liquid in the injection tube 2 is injected into the test tube through the injection head 6. During injection, the L-shaped slide bar 8 fixed on the outside of the push rod 4 will be driven to move downward, so that the bottom end of the L-shaped slide bar 8 will drive the limit block 9 to slide on the inner wall of the protective shell 11. Since the bottom of the limit block 9 is connected to a limit spring 10, when the limit block 9 slides downward, the limit spring 10 will be squeezed downward, so that after the injection, the limit spring 10 rebounds and there will be an automatic reset effect. By pressing the U-shaped plate 13, the U-shaped plate 13 will squeeze the snap spring 12. A snap plate 16 is folded in the internal groove of the U-shaped plate 13. The folded snap plate 16 is opened, and the pressed U-shaped plate 13 is released, and the snap spring 12 rebounds. The U-shaped plate 13 drives the card plate 16 to insert into the card slot 7. Since a groove is provided on the right side surface of the L-shaped slide bar, the card plate 16 will clamp the L-shaped slide bar, thereby realizing the quantitative effect of injecting liquid into the injection tube 2. After the liquid in the injection tube 2 is injected, due to the air pressure, some injection liquid will remain in the inner wall cavity of the injection tube 2 during the injection of the liquid. At this time, the card bead 20 fixed at the front end of the rotary valve 19 is driven to rotate inside the infusion tube 18 by rotating the rotary valve 19, so that the through hole opened on the outside of the card bead 20 is parallel to the infusion tube 18, and then the push rod 4 is driven by pulling the push rod 4 to extract the cleaning liquid stored in the cleaning tube 17 into the injection tube 2, and then squeezed downward to discharge it, thereby achieving the effect of cleaning the injection tube 2, and the rotary valve 19 is rotated at the same time to block the infusion tube 18.

[0028] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A liquid injection device for microbiological testing, comprising a sealed tube (1), characterized in that: The inner wall of the sealing tube (1) is fixedly connected to a liquid injection tube (2), the inner wall cavity of the liquid injection tube (2) is slidably connected to a rubber piston (3), the top of the rubber piston (3) is fixedly connected to a push rod (4), the bottom of the liquid injection tube (2) is provided with a liquid injection head (6), the outer right side of the push rod (4) is fixedly connected to an L-shaped sliding rod (8), the outer right side of the sealing tube (1) is fixedly connected to a protective shell (11), the inner wall of the protective shell (11) is slidably connected to a limit block (9), the bottom of the limit block (9) is fixedly connected to a limit spring (10), the outer side of the protective shell (11) is fixedly connected to a limit spring (10), and the outer A card slot (7) is provided on the right side of the protective shell (11); a fixed plate (14) is fixedly connected to the right side of the outside of the protective shell (11); a rotating column (5) is fixedly connected to the adjacent side of the two fixed plates (14); a U-shaped plate (13) is rotatably connected to the outside of the rotating column (5); a buckle spring (12) is fixedly connected to the left end of the U-shaped plate (13); a U-shaped groove is provided on the left end of the U-shaped plate (13); a limiting column (15) is rotatably connected to the inner wall of the U-shaped plate (13); a card plate (16) is fixedly connected to the outside of the limiting column (15); and a cleaning component is fixedly connected to the left side of the sealing tube (1).

2. The microbial test liquid injection device according to claim 1, characterized in that: The cleaning assembly comprises an infusion tube (18), a rotary valve (19), a clamping bead (20) and a cleaning tube (17); one end of the infusion tube (18) is fixedly connected to the outside of the left end of the sealing tube (1) and extends to the injection tube (2); the outside of the rotary valve (19) is rotatably connected to the front end of the infusion tube (18); the outside of the clamping bead (20) is rotatably connected to the inner wall of the infusion tube (18); and the other end of the infusion tube (18) is fixedly connected to the outside right side of the cleaning tube (17).

3. The microbial test liquid injection device according to claim 1, characterized in that: The injection head (6) is externally fixedly connected to the bottom of the sealing tube (1) and extends outwards, and the bottom end of the L-shaped sliding rod is fixedly connected to the top of the limiting block (9).

4. The microbial test liquid injection device according to claim 1, characterized in that: The outside of the limit block (9) is slidably connected to the inner wall of the protective shell (11), and the bottom end of the limit spring (10) is fixedly connected to the bottom of the protective shell (11).

5. The microbial test liquid injection device according to claim 1, characterized in that: The left side of the snap spring (12) is fixedly connected to the right side of the outside of the protective shell (11), the bottom of the U-shaped plate (13) is in contact with the right side of the outside of the protective shell (11), the right side of the clamping plate (16) is in contact with the inner wall of the U-shaped plate (13), and a U-shaped notch is provided on the right side of the outside of the L-shaped slide rod (8).

6. The microbial test liquid injection device according to claim 1, characterized in that: The L-shaped sliding rod (8) is slidably connected to the top inner wall of the protective shell (11), and the push rod (4) is externally slidably connected to the top inner wall of the sealing tube (1) and extends toward the top inner wall of the injection tube (2).

7. The microbiological test liquid injection device according to claim 2, characterized in that: The rear end of the rotary valve (19) is fixedly connected to the front end of the clamping bead (20), and a through hole is arranged outside the clamping bead (20).

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