High-efficiency pipette air tightness detection equipment and control method thereof

Abstract

The invention discloses air tightness detection equipment, and aims to provide high-efficiency transfer pipette air tightness detection equipment with high automation degree and good detection effect and a control method of the transfer pipette air tightness detection equipment. According to the technical scheme, transfer pipettes are conveyed through a transmission belt and a material placing mechanism on the transmission belt; the transmission belt drives the pipette to complete the detection of the air tightness of the pipette through the air tightness detection device, and meanwhile, the air tightness detection mode is that one end of the pipette to be detected is blocked and the other end of the pipette is subjected to air exhaust, so that the air pressure in the pipette is reduced, and a pressure maintaining link is added after the air exhaust is completed; the air pressure of the transfer pipette is detected in the pressure maintaining process, so that the air tightness of the transfer pipette is conveniently detected, unqualified products can be automatically removed, the overall automation degree is high, the overall processing efficiency is improved by arranging multiple groups of material blocking assemblies and air exhaust assemblies, and the transfer pipette detection device is suitable for the technical field of transfer pipette detection.

Description

Technical Field

[0001] The present invention relates to an air tightness detection device, and more particularly to an efficient pipette air tightness detection device and a control method thereof. Background Art

[0002] Pipette air tightness testing equipment is a device that detects whether the pipette is airtight.

[0003] The existing pipette air tightness testing equipment still has some defects when in use: the existing pipette air tightness testing equipment usually adopts the method of blowing air into the pipette to perform the air tightness testing on the pipette. Although the testing method is simple and effective, during the testing, the pipette may burst and be damaged due to blowing in excessive air, which not only affects the testing efficiency but also causes a waste of resources. In addition, the existing pipette air tightness testing equipment can only test the pipettes individually, each test consumes a lot of time, and the overall testing efficiency is low. Summary of the invention

[0004] In view of the deficiencies in the prior art, the object of the present invention is to provide a highly efficient pipette air tightness detection device and a control method thereof with a high degree of automation and good detection effect.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a highly efficient pipette air tightness detection device, comprising a frame, a transmission belt is provided on the frame, and a plurality of placement mechanisms for placing pipettes are provided along the length direction of the transmission belt. A sealing detection device is also provided on the transmission belt, and the sealing detection device comprises an adjustment frame arranged on both sides of the transmission belt and an exhaust structure arranged on the adjustment frame, one end of the exhaust structure is connected to a pressure sensor, and a discharging device is also provided on one side of the frame.

[0006] The present invention is further configured as follows: the material placing mechanism comprises a material transport rack arranged on both sides of the transmission belt, a clamping claw arranged on the material transport rack, and a tightening device arranged at the bottom of the clamping claw, and a rubber sleeve is also arranged on the clamping claw.

[0007] Preferably, the discharging device includes a discharging plate, positioning rods arranged at both ends of the discharging plate, and clamps arranged on the positioning rods, and the distance between the positioning rods is equal to the distance between the transport racks.

[0008] The present invention is further configured as follows: the exhaust structure includes a blocking component arranged at one end of the transmission belt and an exhaust component arranged at the other end of the transmission belt, the blocking component includes a blocking telescopic rod arranged on the adjusting frame and a plug arranged on the blocking telescopic rod, and the exhaust component includes an exhaust telescopic rod arranged on the adjusting frame and a suction head arranged on the exhaust telescopic rod.

[0009] Preferably, the plug and the suction head are both provided with rubber membranes, and after the pipette is placed on the claw, the height of the suction head matches the height of the pipette.

[0010] The present invention is further configured as follows: a material return structure is also provided on the transmission belt, and the material return structure includes a push rod arranged at one end of the transmission belt and a collection frame arranged at the other end of the transmission belt, and the push rod is used to push unqualified pipettes on the transmission belt into the collection frame.

[0011] Preferably, the blocking components and the air extraction components are configured to be arranged in a plurality along the length direction of the transmission belt, and the distance between each of the blocking components and the air extraction components is equal to the distance between each of the claws.

[0012] The present application also provides a high-efficiency control method for a pipette air tightness detection device, which is characterized by comprising the following steps: S1, placing the pipette on the clamping claw of the material placement mechanism, and the tightening device at the bottom of the clamping claw clamps the pipette; S2, the transmission belt drives the pipette to move to the sealing detection device; S3, the blocking component blocks the opening at one end of the pipette, and the vacuum component blocks the opening at the other end of the pipette, and the suction head of the vacuum component extends into the interior of the pipette; S4, the vacuum assembly vacuums the pipette for a vacuum time of T; S5. After the T time period, the pressure sensor detects the pressure value P in the pipette. If P>0.5, it is judged that there is a lot of gas in the current pipette and the air pressure is unqualified. The air extraction component continues to extract and test. On the contrary, if P≤0.5, it is judged that the air pressure in the current pipette is qualified, and jump to S6 to continue testing; S6, the vacuum assembly stops vacuuming the pipette and keeps the pipette sealed for a time of T1; S7, after the T1 time period, the pressure sensor detects the pressure value P1 in the pipette. If P1-P≥0.25, it is judged that the current pipette has poor sealing performance, and the device records the unqualified pipette. Otherwise, it is judged that the current pipette has good sealing performance; S8, the transmission belt continues to move, and the material return component detects whether the current pipette is unqualified. If so, it is determined that the current pipette needs to be returned, and the transmission belt stops temporarily. At the same time, the push rod pushes the unqualified pipette on the transmission belt out to the collection frame for recycling. Conversely, if the current pipette is detected to be qualified, the current pipette is determined to be qualified, and the transmission belt continues to move, driving the pipette to move to the discharging device for discharging.

[0013] Preferably, the pipette detection in step S8 further comprises the following steps: S81, setting the blocking component and the discharging component in the air pumping structure close to the discharging device to be numbered 1, and sequentially numbering the remaining blocking components and the discharging components; S82, the pipette that fails the air extraction structure test is numbered X, and the transmission belt continues to move; S83, the material return structure records the currently detected pipette as Y, and detects the pipette passing through the material push structure at the same time; S84, Y count + 1, and detect Y and X at the same time. If Y≠X, the pipette at the current material return structure is judged to be qualified, and the conveyor belt continues to move. Otherwise, if Y=X, the pipette at the current material return structure is judged to be unqualified, and the material return structure returns the current pipette.

[0014] By adopting the above technical scheme, the beneficial effects are as follows: 1. The material transportation of the pipette is completed by the transmission belt and the material placing mechanism on the transmission belt, and the transmission belt drives the pipette to complete the air-tightness detection of the pipette through the sealing detection device. At the same time, the air-tightness detection method is to block one end of the pipette with the detection belt and evacuate the air at the other end of the pipette, so that the internal air pressure of the pipette is reduced, and a pressure holding link is added after the air extraction is completed, and the air pressure of the pipette is detected during the pressure holding process, so as to conveniently detect the air-tightness of the pipette and automatically exclude unqualified products. The overall degree of automation is high, and by providing multiple groups of blocking components and air extraction components, the overall processing efficiency is improved. Furthermore, in the process of air-tightness detection, the pipette is clamped by providing a claw to effectively prevent vibration during the processing, and the processing method adopts air extraction detection to prevent the pipette from bursting during the detection process, which greatly improves the safety performance during the detection process.

[0015] 2. Furthermore, in order to ensure the continuity of the processing and improve the processing efficiency, the vacuum components and the blocking components in the vacuum structure are arranged into several groups along the length direction of the transmission belt, so that the equipment can perform air tightness detection on multiple pipettes at the same time. At the same time, the spacing distance between each of the vacuum components and the blocking components is the same as the spacing distance between each claw on the transmission belt, so that the openings at both ends of the pipette on the transmission belt are further matched with the vacuum components and the blocking components, and no additional position adjustment is required, which reduces the difficulty of operation and improves the detection efficiency. At the same time, when the sealing detection device detects that the pipette with detection is unqualified, a material return structure is arranged on the transmission belt, and the pushing structure can push the unqualified pipette into the collection frame at the other end of the conveyor belt through the pushing rod to collect waste, thereby preventing unqualified pipettes from entering the finished product and affecting the qualified rate of the finished product.

[0016] 3. At the same time, during the air-tightness test of the pipette, the clamping claw clamps the pipette to facilitate the positioning of the vacuum component and the blocking component. The blocking component blocks and seals one end of the pipette, and at the same time, the vacuum component blocks the opening at the other end of the pipette, so that the inside of the pipette remains relatively sealed. At the same time, the vacuum component vacuums the inside of the pipette. At this time, the pressure value in the pipette decreases. At the same time, the minimum pressure value in the pipette is set to P. When the air pressure in the pipette is set to be less than P, it is determined that the current air pressure in the pipette reaches the pressure-maintaining standard, and the next step is jumped to perform the pressure-maintaining operation. If the P value is not reached, the vacuum is continued. Similarly, as an optimization of the air-tightness test process, the maximum vacuuming time T of the vacuum component is limited. If the pipette is If the internal air pressure still does not reach the pressure-maintaining standard, it is judged that the current pipette has poor sealing performance. The pipette takes in air while pumping air, and the pressure-maintaining standard cannot be met. If the pipette is continuously pumped, it will cause production stagnation and waste of resources. The above problems can be effectively avoided by setting a maximum inflation time. Furthermore, in the process of maintaining pressure on the pipette, if the sealing performance of the pipette is good, the pressure value increases by a small amount during the pressure-maintaining process. If the pressure value increases by ≥0.25, the current pipette is judged to be unqualified. At the same time, the plugging head and the suction tip of the blocking component and the air pumping component are all provided with a rubber membrane. The rubber membrane can enhance the sealing performance at the pipette mouth after the plugging head and the suction tip are inserted into the pipette, thereby improving the detection accuracy and achieving good detection effect.

[0017] 4. At the same time, in order to facilitate the classification and recycling of unqualified pipettes, the device can record the current unqualified pipette numbers. At the same time, the material return structure detects the unqualified pipettes and pushes the unqualified pipettes into the collection frame through the pushing rod. Specifically, since the blocking components and the air pumping components on the transmission belt are provided in plurality, by numbering each component in the air pumping structure, generally speaking, in order to facilitate the writing and setting of the program, the component number near the discharge device is set to 1. Since the pushing structure is located in the next sequence of the air pumping structure, for example, when the component number is X, the pipette above it needs to move X positions to reach the material return structure. Further, when adding During the operation, the initial count of the material return structure is set to 0. When the material return structure detects the pipette, the count is +1. If the count of the material return structure is the same as the number of the unqualified pipette, the current pipette is judged to be the pipette that needs to be returned, and the material return component performs the material return operation. Furthermore, in order to facilitate recording, it is necessary to reset the count of the device. For example, two groups of blocking components and air suction components are provided in the vacuum structure. When the count value of the material return structure accumulates to 2, it is judged that the equipment has completed a round of detection cycle. At the same time, the undetected pipette is moved to the blocking component and the air suction component. The value of the material return component needs to be reset to 0 for the convenience of detection. The degree of automation is high and the detection effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a specific structural schematic diagram of an embodiment of a highly efficient pipette air tightness detection device and a control method thereof of the present invention; Figure 2 A control method flow chart of an embodiment of a highly efficient pipette air tightness detection device and a control method thereof according to the present invention; Figure 3 The present invention is a pipette detection flow chart of an embodiment of a high-efficiency pipette air tightness detection device and a control method thereof; the figure numerals in the figure are: 1, frame; 2, transmission belt; 3, pipette; 4, material placement mechanism; 41, material transport rack; 42, claw; 43, tightening device; 44, rubber sleeve; 5, sealing detection device; 6, adjustment rack; 71, material blocking assembly; 711, material blocking telescopic rod; 712, plug; 72, vacuum assembly; 721, vacuum telescopic rod; 722, suction head; 73, rubber membrane; 8, discharge device; 81, discharge plate; 82, positioning rod; 83, clamp; 9, material return structure; 91, material pushing rod; 92, collection frame. DETAILED DESCRIPTION

[0019] Reference Figures 1 to 3 A high-efficiency pipette air tightness detection device and a control method embodiment of the control method embodiment of the present invention are further described.

[0020] For ease of explanation, spatial relative terms such as "upper", "lower", "left", "right" and the like are used in the embodiments to illustrate the relationship of one element or feature shown in the figure relative to another element or feature. It should be understood that, in addition to the orientation shown in the figure, the spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, the element described as being "under" other elements or features will be positioned "on" other elements or features. Therefore, the exemplary term "under" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used here can be interpreted accordingly.

[0021] Furthermore, relational terms such as “first” and “second” and the like are merely used to distinguish one component from another having the same name, but do not necessarily require or imply any such actual relationship or order between these components.

[0022] A highly efficient pipette air tightness detection device comprises a frame 1, a transmission belt 2 is arranged on the frame 1, a plurality of placing mechanisms 4 for placing pipettes 3 are arranged along the length direction of the transmission belt 2, a sealing detection device 5 is also arranged on the transmission belt 2, and the sealing detection device 5 comprises an adjustment frame 6 arranged on both sides of the transmission belt 2 and an exhaust structure arranged on the adjustment frame 6, one end of the exhaust structure is connected to a pressure sensor, and a discharging device 8 is also arranged on one side of the frame 1.

[0023] The material placing mechanism 4 comprises a material transport frame 41 arranged on both sides of the transmission belt 2 , a clamping claw 42 arranged on the material transport frame 41 , and a tightening device 43 arranged at the bottom of the clamping claw 42 . A rubber sleeve 44 is also arranged on the clamping claw 42 .

[0024] Preferably, the discharging device 8 includes a discharging plate 81 , positioning rods 82 disposed at both ends of the discharging plate 81 , and a clamping member 83 disposed on the positioning rods 82 , and the distance between the positioning rods 82 is equal to the distance between the transport racks 41 .

[0025] The exhaust structure includes a blocking component 71 arranged at one end of the transmission belt 2 and an exhaust component 72 arranged at the other end of the transmission belt 2. The blocking component 71 includes a blocking telescopic rod 711 arranged on the adjusting frame 6 and a plug 712 arranged on the blocking telescopic rod 711. The exhaust component 72 includes an exhaust telescopic rod 721 arranged on the adjusting frame 6 and a suction head 722 arranged on the exhaust telescopic rod 721.

[0026] Preferably, the plug 712 and the suction head 722 are both provided with a rubber membrane 73 , and after the pipette 3 is placed on the claw 42 , the height of the suction head 722 matches the height of the pipette 3 .

[0027] The transmission belt 2 is also provided with a material return structure 9, which includes a push rod 91 arranged at one end of the transmission belt 2 and a collection frame 92 arranged at the other end of the transmission belt 2. The push rod 91 is used to push the unqualified pipettes 3 on the transmission belt 2 into the collection frame 92.

[0028] Preferably, the blocking components 71 and the exhaust components 72 are configured to be arranged in a plurality along the length direction of the transmission belt 2 , and the distance between each of the blocking components 71 and the exhaust components 72 is equal to the distance between each of the claws 42 .

[0029] The material transportation of the pipette 3 is completed by the transmission belt 2 and the material placing mechanism 4 on the transmission belt 2. The transmission belt 2 drives the pipette 3 to complete the air-tightness detection of the pipette 3 through the sealing detection device 5. At the same time, the air-tightness detection method is to block one end of the pipette 3 with the detection belt and evacuate the air at the other end of the pipette 3, so that the internal air pressure of the pipette 3 is reduced, and a pressure holding link is added after the air extraction is completed. The air pressure of the pipette 3 is detected during the pressure holding process, so that the air-tightness of the pipette 3 can be conveniently detected, and unqualified products can be automatically eliminated. The overall degree of automation is high, and by providing multiple groups of blocking components 71 and exhaust components 72, the overall processing efficiency is improved. Furthermore, in the process of air-tightness detection, the pipette 3 is clamped by providing a clamping claw 42 to effectively prevent vibration during the processing, and the processing method adopts exhaust detection to prevent the pipe from bursting during the detection process, which greatly improves the safety performance during the detection process.

[0030] Furthermore, in order to ensure the continuity of the processing and improve the processing efficiency, the vacuum assembly 72 and the blocking assembly 71 in the vacuum structure are arranged into several groups along the length direction of the transmission belt 2, so that the equipment can simultaneously perform air tightness detection of multiple pipettes 3. At the same time, the spacing distance between each of the vacuum assemblies 72 and the blocking assembly 71 is the same as the spacing distance between each claw 42 on the transmission belt 2, and the openings at both ends of the pipette 3 on the transmission belt 2 are further matched with the vacuum assembly 72 and the blocking assembly 71, and no additional position adjustment is required, which reduces the difficulty of operation and improves the detection efficiency. At the same time, when the sealing detection device 5 detects that the pipette 3 with the detection is unqualified, by providing a material return structure 9 on the transmission belt 2, the pushing structure can push the unqualified pipette 3 into the collection frame 92 at the other end of the conveyor belt through the pushing rod 91 for waste collection, thereby preventing the unqualified pipette 3 from entering the finished product and affecting the qualified rate of the finished product.

[0031] The present application also provides a control method for an efficient air tightness detection device for a pipette 3, characterized in that it comprises the following steps: S1, the pipette 3 is placed on the clamping claw 42 of the material placing mechanism 4, and the tightening device 43 at the bottom of the clamping claw 42 clamps the pipette 3; S2, the transmission belt 2 drives the pipette 3 to move to the sealing detection device 5; S3, the blocking component 71 blocks the opening at one end of the pipette 3, and the air extraction component 72 blocks the opening at the other end of the pipette 3, and the suction head 722 of the air extraction component 72 extends into the interior of the pipette 3; S4, the air extraction component 72 extracts air from the pipette 3, and the extraction time is T; S5. After the T time period, the pressure sensor detects the pressure value P in the pipette 3. If P>0.5, it is determined that there is a lot of gas in the current pipette 3 and the air pressure is unqualified. The air extraction component 72 continues to extract and detect. On the contrary, if P≤0.5, it is determined that the air pressure in the current pipette 3 is qualified, and jumps to S6 to continue detection; S6, the air extraction component 72 stops extracting air from the pipette 3, while keeping the pipette 3 sealed for a time period of T1; S7, after the T1 time period, the pressure sensor detects the pressure value P1 in the pipette 3. If P1-P≥0.25, it is judged that the current pipette 3 has poor sealing performance, and the device records the unqualified pipette 3. Otherwise, it is judged that the current pipette 3 has good sealing performance; S8, the transmission belt 2 continues to move, and the material return component detects whether the current pipette 3 is unqualified. If so, it is determined that the current pipette 3 needs to be returned, and the transmission belt 2 stops temporarily. At the same time, the pushing rod 91 pushes the unqualified pipette 3 on the transmission belt 2 to the collection frame 92 for recovery. On the contrary, if the current pipette 3 is detected to be qualified, it is determined that the current pipette 3 is qualified, and the transmission belt 2 continues to move, driving the pipette 3 to move to the discharging device 8 for discharging.

[0032] Preferably, the detection of the pipette 3 in step S8 further includes the following steps: S81, setting the blocking component 71 and the discharging component near the discharging device 8 in the air extraction structure to be numbered 1, and sequentially numbering the remaining blocking components 71 and the discharging components; S82, the pipette 3 that fails the air extraction structure detection is numbered X, and the transmission belt 2 continues to move; S83, the material-returning structure 9 records that the currently detected pipette 3 is Y, and detects the pipette 3 passing through the material-pushing structure at the same time; S84, Y count + 1, and detect Y and X at the same time. If Y≠X, the pipette 3 at the current material return structure 9 is judged to be qualified, and the conveyor belt 2 continues to move. Otherwise, if Y=X, the pipette 3 at the current material return structure 9 is judged to be unqualified, and the material return structure 9 returns the current pipette 3.

[0033] When the air pressure in the pipette 3 is lowered, the pressure in the pipette 3 is reduced, and the minimum pressure value in the pipette 3 is set to P. When the air pressure in the pipette 3 is set to be less than P, it is judged that the air pressure in the current pipette 3 reaches the pressure maintenance standard, and the next step is jumped to perform the pressure maintenance operation. If the P value is not reached, the air is continued to be pumped. Similarly, as an optimization in the air tightness detection process, the maximum air pumping time T of the air pumping component 72 is limited. If the air pressure in the pipette 3 is still not lowered after T time, the pressure in the pipette 3 is still lowered. If the pressure-maintaining standard is met, it is judged that the current pipette 3 has poor sealing performance, and the pipette 3 takes in air while pumping air, and the pressure-maintaining standard cannot be met. If the pipette 3 is continuously pumped, it will cause production stagnation and waste of resources. The above problems can be effectively avoided by setting a maximum inflation time. Furthermore, in the process of maintaining pressure on the pipette 3, if the sealing performance of the pipette 3 is good, the pressure value increases by a small amount during the pressure-maintaining process. If the pressure value increases by ≥0.25, it is judged that the current pipette 3 is unqualified. At the same time, a rubber membrane 73 is provided on the plugging head 712 and the suction head 722 of the blocking component 71 and the suction component 72. The rubber membrane 73 can enhance the sealing performance at the mouth of the pipette 3 after the plugging head 712 and the suction head 722 are inserted into the pipette 3, thereby improving the detection accuracy and achieving good detection effect.

[0034] At the same time, in order to facilitate the classification and recycling of unqualified pipettes 3, the device can record the numbers of the current unqualified pipettes 3. At the same time, the material return structure 9 detects the unqualified pipettes 3 and pushes the unqualified pipettes 3 into the collection frame 92 through the pushing rod 91. Specifically, since the blocking components 71 and the air pumping components 72 on the transmission belt 2 are provided in multiple numbers, by numbering each component in the air pumping structure, generally speaking, in order to facilitate the writing and setting of the program, the component number near the discharge device 8 is set to 1. Since the pushing structure is located in the next sequence of the air pumping structure, for example, when the component number is X, the pipette 3 above it needs to move X positions to reach the material return structure 9. Further, in the processing During the process, the initial count of the material return structure 9 is set to 0. When the material return structure 9 detects the pipette 3, the count is +1. If the count of the material return structure 9 is the same as the number of the unqualified pipette 3, it is judged that the current pipette 3 is the pipette 3 that needs to be returned, and the material return component performs the material return operation. Furthermore, in order to facilitate recording, it is necessary to reset the count of the device. For example, two groups of blocking components 71 and suction components 72 are provided in the vacuum structure. When the count value of the material return structure 9 accumulates to 2, it is judged that the equipment has completed a round of detection cycle. At the same time, the undetected pipette 3 is moved to the blocking component 71 and the suction component 72. The value of the material return component needs to be reset to 0 for the convenience of detection. The degree of automation is high and the detection effect is good.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A highly efficient pipette air tightness detection device, comprising a frame (1), characterized in that: The frame (1) is provided with a transmission belt (2), and the transmission belt (2) is provided with a plurality of material placement mechanisms (4) for placing pipettes (3) along its length direction. The transmission belt (2) is also provided with a sealing detection device (5), and the sealing detection device (5) comprises an adjustment frame (6) arranged on both sides of the transmission belt (2) and an air extraction structure arranged on the adjustment frame (6), one end of the air extraction structure is connected to a pressure sensor. A material discharging device (8) is also provided on one side of the frame (1).

2. A highly efficient pipette air tightness detection device according to claim 1, characterized in that: The material placing mechanism (4) comprises a material transport frame (41) arranged on both sides of the transmission belt (2), a clamping claw (42) arranged on the material transport frame (41), and a tightening device (43) arranged at the bottom of the clamping claw (42), and a rubber sleeve (44) is also arranged on the clamping claw (42).

3. A highly efficient pipette air tightness detection device according to claim 2, characterized in that: The discharging device (8) comprises a discharging plate (81), positioning rods (82) arranged at both ends of the discharging plate (81), and a clamping member (83) arranged on the positioning rods (82), and the distance between the positioning rods (82) is equal to the distance between the material transport racks (41).

4. The high-efficiency pipette air tightness detection device according to claim 1, characterized in that: The air extraction structure comprises a material blocking component (71) arranged at one end of the transmission belt (2) and an air extraction component (72) arranged at the other end of the transmission belt (2); the material blocking component (71) comprises a material blocking telescopic rod (711) arranged on the adjustment frame (6) and a plug (712) arranged on the material blocking telescopic rod (711); and the air extraction component (72) comprises an air extraction telescopic rod (721) arranged on the adjustment frame (6) and a suction head (722) arranged on the air extraction telescopic rod (721).

5. A highly efficient pipette (3) air tightness detection device according to claim 4, characterized in that: The plug (712) and the suction head (722) are both provided with a rubber membrane (73), and after the pipette (3) is placed on the claw (42), the height of the suction head (722) matches the height of the pipette (3).

6. A highly efficient pipette air tightness detection device according to claim 1, characterized in that: The transmission belt (2) is also provided with a material return structure (9), the material return structure (9) comprising a push rod (91) arranged at one end of the transmission belt (2) and a collection frame (92) arranged at the other end of the transmission belt (2), the push rod (91) being used to push unqualified pipettes (3) on the transmission belt (2) into the collection frame (92).

7. A highly efficient pipette air tightness detection device according to claim 4, characterized in that: The blocking components (71) and the air extraction components (72) are configured to be arranged in a plurality along the length direction of the transmission belt (2), and the distance between each of the blocking components (71) and the air extraction components (72) is equal to the distance between each of the claws (42).

8. A control method for the high-efficiency pipette air tightness detection device according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1, the pipette (3) is placed on the clamping claw (42) of the material placing mechanism (4), and the tightening device (43) at the bottom of the clamping claw (42) clamps the pipette (3); S2, the transmission belt (2) drives the pipette (3) to move to the sealing detection device (5); S3, the blocking component (71) blocks the opening at one end of the pipette (3), and the air extraction component (72) blocks the opening at the other end of the pipette (3), and the suction head (722) of the air extraction component (72) extends into the interior of the pipette (3); S4, the air extraction component (72) extracts air from the pipette (3), and the extraction time is T; S5. After the T time period, the pressure sensor detects the pressure value P in the pipette (3). If P>0.5, it is determined that there is a lot of gas in the current pipette (3) and the air pressure is unqualified. The air extraction component (72) continues to extract and test. On the contrary, if P≤0.5, it is determined that the air pressure in the current pipette (3) is qualified, and the process jumps to S6 to continue testing. S6, the air extraction component (72) stops extracting air from the pipette (3) and keeps the pipette (3) sealed for a time period of T1; S7, after the T1 time period, the pressure sensor detects the pressure value P1 in the pipette (3), if P1-P≥0.25, it is judged that the current pipette (3) has poor sealing performance, and the device records the unqualified pipette (3), otherwise, it is judged that the current pipette (3) has good sealing performance; S8, the transmission belt (2) continues to move, and the material return component detects whether the current pipette (3) is unqualified. If so, it is determined that the current pipette (3) needs to be returned, and the transmission belt (2) is temporarily stopped. At the same time, the push rod (91) pushes the unqualified pipette (3) on the transmission belt (2) to the collection frame (92) for recovery. On the contrary, if the current pipette (3) is detected to be qualified, it is determined that the current pipette (3) is qualified, and the transmission belt (2) continues to move, driving the pipette (3) to move to the discharging device (8) for discharging.

9. A control method for a high-efficiency pipette air tightness detection device according to claim 8, characterized in that: The detection of the pipette (3) in step S8 further includes the following steps: S81, setting the blocking component (71) and the discharging component near the discharging device (8) in the air extraction structure to be numbered 1, and sequentially numbering the remaining blocking components (71) and the discharging components; S82, the pipette (3) that fails the air extraction structure test is numbered X, and the transmission belt (2) continues to move; S83, the material return structure (9) records the currently detected pipette (3) as Y, and simultaneously detects the pipette (3) passing through the material push structure; S84, Y counts +1, and Y and X are detected at the same time. If Y≠X, the pipette (3) at the current material-returning structure (9) is judged to be qualified, and the transmission belt (2) continues to move. On the contrary, if Y=X, the pipette (3) at the current material-returning structure (9) is judged to be unqualified, and the material-returning structure (9) returns the current pipette (3).

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