Auxiliary device for testing tightness of pipettor

Abstract

The utility model relates to the field of pipettor inspection, in particular to an auxiliary device for pipettor tightness inspection, which comprises a detector, a connecting hose is arranged on the front surface of the detector, and a positioning component is arranged on the front surface of the detector close to the front of the connecting hose. And the positioning assembly comprises an auxiliary box, the auxiliary box is fixedly connected to the front portion, close to the connecting hose, of the front surface of the detector, the right side of the auxiliary box is in threaded connection with a threaded rod, and the right side of the threaded rod is fixedly connected with an anti-skid holding rod. The pipettor is directly inserted from the circular groove and continues to move inwards to enable the suction nozzle of the pipettor to be inserted into the connecting hose, the rubber pressing blocks are driven by rotating the anti-skid holding rod to move inwards, the pipettor sleeve is extruded and positioned in cooperation with the multiple sets of rubber pressing blocks, and meanwhile the supporting arc plate is matched for supporting; the operation convenience and the connection stability are improved, falling is prevented, and the detection efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of pipette testing, in particular to an auxiliary device for testing the tightness of a pipette. Background Art

[0002] As a commonly used quantitative pipetting tool in the laboratory, the accuracy and reliability of the pipette are crucial to the accuracy of experimental results. The tightness of the pipette is one of the key factors affecting its performance. If the pipette has a loose seal, it will lead to inaccurate pipetting volume, increased errors, and may even cause experimental failure or incorrect conclusions.

[0003] However, during the existing pipette tightness test process, the pipette tip needs to be tightly connected to the connecting hose interface of the detector. However, in actual operation, since the pipette tip is usually directly inserted into the hose and there is a lack of a special fixing structure, during the test operation, any contact or movement may cause the connection between the hose and the tip to loosen or even fall off, affecting the normal progress of the test work and reducing the test efficiency. Therefore, an auxiliary device for pipette tightness test is proposed to solve the above problems. Utility Model Content

[0004] In order to make up for the above shortcomings, the utility model provides an auxiliary device for pipette tightness testing, which aims to improve the problem in the prior art that "the pipette tip is inserted into the hose, and due to the lack of a special fixing structure, when it is touched or moved during the inspection operation, it may cause the connection between the hose and the tip to loosen or even fall off, affecting the normal progress of the inspection work."

[0005] In order to achieve the above-mentioned purpose, the utility model provides an auxiliary device for testing the tightness of a pipette, including a detector, a connecting hose is provided on the front surface of the detector, a positioning assembly is provided on the front surface of the detector near the front of the connecting hose, the positioning assembly includes an auxiliary box, the auxiliary box is fixedly connected to the front surface of the detector near the front of the connecting hose, a threaded rod is threadedly connected to the right side of the auxiliary box, a non-slip grip rod is fixedly connected to the right side of the threaded rod, a sliding groove is provided on the inner wall of the auxiliary box near the left side of the threaded rod, a support assembly is provided on the front surface of the auxiliary box, and the support assembly includes a support plate, and the support plate is fixedly connected to the front surface of the auxiliary box near the bottom of the front surface of the circular groove.

[0006] As a further description of the above technical solution:

[0007] The front surface of the auxiliary box is provided with a sealing assembly, which includes a rubber ring. The rubber ring is slidably connected to the front surface of the auxiliary box. The front surface of the auxiliary box is provided with a circular groove near the outer side of the circular groove.

[0008] As a further description of the above technical solution:

[0009] The left side of the threaded rod is rotatably connected to a guide block, and the left side of the guide block is fixedly connected to a rubber pressure block.

[0010] As a further description of the above technical solution:

[0011] The guide block is slidably connected to the inner wall of the slide groove, and the left front surface of the rubber pressing block is set as an inclined surface.

[0012] As a further description of the above technical solution:

[0013] A circular groove is provided in the middle of the front surface of the auxiliary box, the connecting hose is fixedly connected to the middle of the circular groove, and the sliding groove is communicated with the inner wall of the circular groove.

[0014] As a further description of the above technical solution:

[0015] There are four groups of slides, rubber pressure blocks and guide blocks. The four groups of slides, rubber pressure blocks and guide blocks are arranged in a circular array with the center point of the circular groove as the symmetry axis. Another group of guide blocks is elastically connected to the auxiliary box through a spring.

[0016] As a further description of the above technical solution:

[0017] A supporting arc plate is fixedly connected to the top end of the supporting plate, and the supporting arc plate is arranged in a semicircular arc shape.

[0018] As a further description of the above technical solution:

[0019] The rubber ring is elastically connected to the auxiliary box through spring 2, one end of the spring 2 is fixedly connected to the rear surface of the rubber ring, and the other end of the spring 2 is fixedly connected to the inner wall of the rear surface of the annular groove, and the spring 2 is arranged on the inner wall of the annular groove.

[0020] The utility model has the following beneficial effects:

[0021] 1. In the utility model, the pipette is directly inserted into the circular groove and continued to move inward so that the nozzle of the pipette is inserted into the connecting hose. The rubber pressure block is driven inward by rotating the anti-slip grip, and the pipette sleeve is squeezed and positioned in cooperation with multiple groups of rubber pressure blocks. At the same time, the support arc plate provides support, which improves the convenience of operation and the stability of the connection, prevents falling off, and improves the detection efficiency.

[0022] 2. In the utility model, the pipette is inserted into the circular groove. When testing, the control button of the pipette is pressed inward. By pressing the control button, the arc surface at the rear end of the sleeve of the pipette moves inward to squeeze the rubber ring, and at the same time squeezes the second spring. The rubber ring is always squeezed by the cooperation of the second spring, thereby improving the sealing of the connection between the sleeve, the nozzle and the connecting hose, and improving the detection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the overall device in the utility model.

[0024] Figure 2 It is a right side schematic view of the three-dimensional structure of the auxiliary box in the present utility model.

[0025] Figure 3 This is a schematic diagram of the three-dimensional structure section of the auxiliary box in the present invention.

[0026] Figure 4 It is a schematic cross-sectional view of the three-dimensional structure of the auxiliary box in the present utility model.

[0027] Legend:

[0028] 1. Detector; 2. Auxiliary box; 3. Rubber ring; 4. Support plate; 5. Connecting hose; 21. Anti-slip grip rod; 22. Threaded rod; 23. Slide groove; 24. Rubber pressure block; 25. Guide block; 26. Circular groove; 27. Spring 1; 31. Spring 2; 32. Circular ring groove; 41. Support arc plate. DETAILED DESCRIPTION

[0029] Reference Figure 1 、 Figure 3 and Figure 4The present invention provides an embodiment of an auxiliary device for testing the tightness of a pipette, comprising a detector 1 that can test the tightness of a pipette. The detector 1 is a prior art and can be implemented by a person skilled in the art. Since it is a prior art, it will not be described in detail in this case. The front surface of the detector 1 is provided with a connecting hose 5 connected to the pipette. The front surface of the detector 1 is provided with a positioning component near the front of the connecting hose 5. The positioning component includes an auxiliary box 2 that provides auxiliary detection. The auxiliary box 2 is fixedly connected to the front surface of the detector 1 near the connecting hose. In front of the tube 5, the right side of the auxiliary box 2 is threadedly connected with a threaded rod 22 which can drive the guide block 25 to move by being threadedly connected to the auxiliary box 2. The right side of the threaded rod 22 is fixedly connected with a non-slip grip rod 21 which can drive the threaded rod 22 to rotate and has an anti-slip block on the outer wall. The inner wall of the auxiliary box 2 is provided with a slide groove 23 near the left side of the threaded rod 22 for providing movement of the guide block 25. The front surface of the auxiliary box 2 is provided with a support assembly, and the support assembly includes a support plate 4 that provides support for the support arc plate 41. The support plate 4 is fixedly connected to the front surface of the auxiliary box 2 below the front surface near the circular groove 26.

[0030] Reference Figure 1 、 Figure 2 and Figure 3 A sealing assembly is provided on the front surface of the auxiliary box 2, and the sealing assembly includes a rubber ring 3 made of rubber material that can fit tightly with the pipette. The rubber ring 3 is slidably connected to the front surface of the auxiliary box 2. A circular groove 32 is provided on the front surface of the auxiliary box 2 near the outside of the circular groove 26 to provide a space for the spring 2 31 to be squeezed.

[0031] Reference Figure 1 、 Figure 3 and Figure 4 The left side of the threaded rod 22 is rotatably connected to a guide block 25 that drives the rubber pressure block 24 to move. The left side of the guide block 25 is fixedly connected to a rubber pressure block 24 made of rubber material to increase friction and increase the effect of positioning the pipette. The guide block 25 is slidably connected to the inner wall of the slide groove 23. The left front surface of the rubber pressure block 24 is set as an inclined surface. By setting it as an inclined surface, the pipette can directly squeeze the inclined surfaces of the other three groups of rubber pressure blocks 24, so that the other three groups of rubber pressure blocks 24 move outward to squeeze the spring 1 27. The reverse force of the spring 1 27 can support and position the pipette. At the same time, by rotating the threaded rod 22 and threadedly connecting it to the auxiliary box 2, the rubber pressure block 24 is driven to move inward to position the pipette. A circular groove 26 is provided in the middle of the front surface of the auxiliary box 2, which can be used to insert the pipette from the circular groove 26 into the circular groove and connect it to the connecting hose 5. The connecting hose 5 is fixedly connected to the middle of the circular groove 26, and the slide groove 23 is connected to the inner wall of the circular groove 26.

[0032] Reference Figure 1 、 Figure 3 and Figure 4 The chute 23, rubber pressure block 24 and guide block 25 are respectively elastically connected to the spring 1 27 on the outside through the other three groups of rubber pressure blocks 24 and the guide block 25. After the spring 1 27 is squeezed by the pipette, the reverse force of the squeezed spring 1 27 can make the other three groups of rubber pressure blocks 24 reset and position the pipette, and then the rotating threaded rod 22 can make the rubber pressure block 24 move and squeeze the pipette, further improving the positioning effect. The top of the support plate 4 is fixedly connected to the support arc plate 41, which is set in a semicircular arc shape.

[0033] Reference Figure 1 、 Figure 2 and Figure 3 The rubber ring 3 is elastically connected to the auxiliary box 2 through the spring 2 31. After the rubber ring 3 is squeezed by the pipette, the rubber ring 3 moves inward to squeeze the spring 2 31. The reverse force of the squeezing of the spring 2 31 can make the rubber ring 3 reset outward and always fit tightly on the curved rear end surface of the pipette, thereby improving the sealing and the detection effect. One end of the spring 2 31 is fixedly connected to the rear surface of the rubber ring 3, and the other end of the spring 2 31 is fixedly connected to the inner wall of the rear surface of the circular groove 32. The spring 2 31 is set on the inner wall of the circular groove 32.

[0034] Working principle: During use, when performing the pipette tightness test, first align the front end of the pipette with the circular groove 26 on the front surface of the auxiliary box 2. During the insertion process, the front end of the pipette squeezes the inclined surface of the rubber pressure block 24. Since the rubber pressure block 24 is connected to the spring 1 27 through the guide block 25, the spring 1 27 provides elastic support for the guide block 25, so the pipette will push the other three groups of rubber pressure blocks 24 outward, and the spring 1 27 is compressed. At the same time, under the reverse force after the spring 1 27 is compressed, these three groups of rubber pressure blocks 24 will have a certain supporting and positioning effect on the pipette. Then, the operator rotates the threaded rod 22 by holding the anti-slip grip 21. Since the threaded rod 22 is threadedly connected to the auxiliary box 2, as the threaded rod 22 rotates, the guide block 25 connected thereto will move inward along the slide groove 23, and the guide block 25 drives the rubber pressure block 24 to move toward the center of the circular groove 26, thereby further positioning and fixing the pipette.

[0035] During the process of inserting the pipette into the circular groove 26, by pushing the pipette, the rear end arc surface of the pipette squeezes the rubber ring 3, and the rubber ring 3 moves backward under the action of pressure and compresses the spring 2 31. The reverse force generated by the compression of the spring 2 31 causes the rubber ring 3 to reset outward, so that the rubber ring 3 always fits tightly on the rear end arc surface of the pipette, improving the sealing of the connection part. After the positioning and sealing work is completed, the front end of the pipette is tightly connected to the connecting hose 5, and the detector 1 can now test the tightness of the pipette.

[0036] The supporting arc plate 41 and the supporting plate 4 provide auxiliary support for the pipette, thereby improving the stability of the pipette during the detection process. The semicircular supporting arc plate 41 can better fit the shape of the pipette and provide stable support.

Claims

1. An auxiliary device for testing the tightness of a pipette, comprising a detector (1), characterized in that: The front surface of the detector (1) is provided with a connecting hose (5), and the front surface of the detector (1) is provided with a positioning assembly near the front of the connecting hose (5), and the positioning assembly includes an auxiliary box (2), and the auxiliary box (2) is fixedly connected to the front surface of the detector (1) near the front of the connecting hose (5), and the right side of the auxiliary box (2) is threadedly connected to a threaded rod (22), and the right side of the threaded rod (22) is fixedly connected to an anti-slip grip rod (21), and the inner wall of the auxiliary box (2) is provided with a slide groove (23) near the left side of the threaded rod (22), and the front surface of the auxiliary box (2) is provided with a support assembly, and the support assembly includes a support plate (4), and the support plate (4) is fixedly connected to the front surface of the auxiliary box (2) below the front surface near the circular groove (26).

2. The auxiliary device for testing tightness of a pipette according to claim 1, characterized in that: The front surface of the auxiliary box (2) is provided with a sealing assembly, the sealing assembly comprising a rubber ring (3), the rubber ring (3) being slidably connected to the front surface of the auxiliary box (2), and the front surface of the auxiliary box (2) is provided with a circular groove (32) near the outer side of the circular groove (26).

3. The auxiliary device for pipette tightness testing according to claim 1, characterized in that: The left side of the threaded rod (22) is rotatably connected to a guide block (25), and the left side of the guide block (25) is fixedly connected to a rubber pressing block (24).

4. The auxiliary device for testing tightness of a pipette according to claim 3, wherein: The guide block (25) is slidably connected to the inner wall of the slide groove (23), and the left front surface of the rubber pressing block (24) is set as an inclined surface.

5. The auxiliary device for pipette tightness testing according to claim 1, characterized in that: A circular groove (26) is provided in the middle of the front surface of the auxiliary box (2), the connecting hose (5) is fixedly connected to the middle of the circular groove (26), and the sliding groove (23) is connected to the inner wall of the circular groove (26).

6. The auxiliary device for testing tightness of a pipette according to claim 4, characterized in that: The slide groove (23), rubber pressure block (24), and guide block (25) are provided in four groups. The four groups of slide grooves (23), rubber pressure blocks (24), and guide blocks (25) are arranged in a circular array with the center point of the circular groove (26) as the symmetry axis. Another group of guide blocks (25) is elastically connected to the auxiliary box (2) through spring 1 (27).

7. The auxiliary device for pipette tightness testing according to claim 1, characterized in that: The top end of the support plate (4) is fixedly connected to a support arc plate (41), and the support arc plate (41) is arranged in a semicircular arc shape.

8. The auxiliary device for testing tightness of a pipette according to claim 2, characterized in that: The rubber ring (3) is elastically connected to the auxiliary box (2) via a second spring (31), one end of the second spring (31) is fixedly connected to the rear surface of the rubber ring (3), and the other end of the second spring (31) is fixedly connected to the inner wall of the rear surface of the annular groove (32), and the second spring (31) is arranged on the inner wall of the annular groove (32).

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