A microbial sampling detector for the air outlet system of a biological testing safety cabinet

Abstract

The present invention discloses a microbial sampling detector for an air outlet system of a biological testing safety cabinet, and relates to the technical field of microbial sampling and detection. The microbial sampling detector for the air outlet system of the biological testing safety cabinet comprises an air inlet, an air inlet pipe, an air outlet and an air outlet pipe arranged on the safety cabinet body, a sampling and detection box is fixedly connected between the air outlet pipe and the air inlet pipe, and an electrostatic plate is fixedly connected to the top of the sampling and detection box, a collection board is inserted at the bottom of the sampling and detection box, and a plurality of connection blocks are fixedly connected to the bottom of the collection board, and the connection blocks are detachably connected to the inner wall of the sampling and detection box by bolts. The microbial sampling detector for the air outlet system of the biological testing safety cabinet is convenient for sampling and detecting microorganisms in the air outlet system, so as to determine the filtering effect and damage of the high-efficiency air filter, making the sampling and detection of microorganisms in the air outlet system more convenient and quick.

Description

Technical Field

[0001] The invention relates to the technical field of microbial sampling and detection, in particular to a microbial sampling detector for an air outlet system of a biological detection safety cabinet. Background Art

[0002] In a biological testing safety cabinet (biosafety cabinet), the microbial sampling detector of the air outlet system is an important device for detecting the degree of microbial contamination in the exhaust air in the cabinet. When in use, infectious aerosols and splashes are absorbed through the air inlet and enter the high-efficiency air filter through the air inlet pipe for filtration. After the filtration is completed, it enters the safety cabinet body again through the air outlet pipe and the air outlet. This detector is usually integrated into the monitoring system of the biosafety cabinet and can sample and detect microorganisms. When microorganisms are detected, it means that the filtering effect of the high-efficiency air filter has deteriorated or is damaged, and it needs to be replaced to ensure the safety of the cabinet environment and the accuracy of the experimental results.

[0003] However, the working principle of existing microbial sampling detectors is usually to collect air samples exhausted from the cabinet and use specific microbial detection methods (such as culture methods, molecular biology methods, etc.) to detect the microorganisms therein, which is not convenient and fast enough, affecting the efficiency and effectiveness of sampling and detection. Summary of the invention

[0004] The object of the present invention is to provide a microbial sampling detector for an air outlet system of a biological testing safety cabinet to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A microbial sampling detector of an air outlet system of a biological detection safety cabinet comprises an air inlet, an air inlet pipe, an air outlet and an air outlet pipe arranged on a safety cabinet body, a sampling detection box is fixedly connected between the air outlet pipe and the air inlet pipe, and an electrostatic plate is fixedly connected to the top of the sampling detection box, a collection plate is inserted at the bottom of the sampling detection box, and a plurality of connecting blocks are fixedly connected to the bottom of the collection plate, the connecting blocks are detachably connected to the inner wall of the sampling detection box by bolts, and a first movable plate is connected to the inside of the sampling detection box by a first movable mechanism, and the side wall of the first movable plate is connected by a second movable mechanism. The mechanism is connected to a second movable plate, and a movable rod is inserted into the side wall of the second movable plate, one end of the movable rod is detachably connected to a sampling cotton, and the side wall of the movable rod is sleeved with a first spring, the end of the first spring can slide on the side wall of the second movable plate, and the rotation of the movable rod is driven by a first driving mechanism and a second driving mechanism, the top of the sampling and detection box is connected to a first movable block through a telescopic mechanism, and an electron microscope is fixedly inserted at the bottom of the first movable block, a glass slide is embedded in the top of the collection plate, and the movement of the first movable block is driven by a first pushing mechanism.

[0007] Preferably, the telescopic mechanism includes two symmetrically arranged sleeves fixedly connected to the top of the sampling and detection box, and a sleeve rod is inserted into the sleeve, the lower end of the sleeve rod is fixed to the top of the first moving block, and a return spring is sleeved on the side wall of each sleeve.

[0008] Preferably, the first pushing mechanism comprises an inclined plate fixedly connected to a side wall of the first moving block, and a pushing plate is fixedly connected to the side wall of the first moving plate.

[0009] Preferably, the first moving mechanism includes a first guide rod fixedly connected to the inner wall of the sampling and testing box, and the first moving plate is sleeved on the side wall of the first guide rod, the inner wall of the sampling and testing box is rotatably connected to the first threaded rod, and the first moving plate is threadedly connected to the side wall of the first threaded rod, the side wall of the sampling and testing box is fixedly connected to the first motor, and the output end of the first motor is fixed to one end of the first threaded rod.

[0010] Preferably, the second moving mechanism includes two symmetrically arranged sliding blocks slidably connected to the side walls of the first moving plate, each of the sliding blocks is connected to the side wall of the first moving plate through a reset mechanism, and the opposite side walls of the two sliding blocks are fixedly connected to a second guide rod, the second moving plate is sleeved on the side wall of the second guide rod, and the opposite side walls of the two sliding blocks are rotatably connected to a second threaded rod, the second moving plate is threadedly connected to the second threaded rod, the side wall of one of the sliding blocks is fixedly connected to a second motor, and the output end of the second motor is fixed to one end of the second threaded rod.

[0011] Preferably, the first driving mechanism comprises a connecting frame fixedly connected to the bottom of the sliding block, a side wall of the connecting frame is fixedly connected with a rack, and a side wall of the moving rod is fixedly sleeved with a gear.

[0012] Preferably, the second driving mechanism comprises a spirally arranged sliding groove opened on the side wall of the moving rod, and the side wall of the second moving plate is connected with a sliding pin through the third moving mechanism.

[0013] Preferably, the third movable mechanism includes a support plate fixedly connected to the side wall of the second movable plate, and two symmetrically arranged T-shaped guide rods are inserted into the side wall of the support plate, one end of the T-shaped guide rod is fixedly connected to the third movable plate, and the sliding pin is fixed to the side wall of the third movable plate, each of the T-shaped guide rods is provided with a third spring on the side wall, the side wall of the support plate is fixedly connected to an electromagnet, and the side wall of the third movable plate is fixedly connected to an iron block, the side wall of the second movable plate is fixedly connected to a mounting block, and the side wall of the mounting block is fixedly inserted with a visual sensor.

[0014] Preferably, the reset mechanism includes two symmetrically arranged connecting rods fixedly connected to the top of each sliding block, and the side walls of the connecting rods are sleeved with connecting plates, the connecting plates are fixed to the side walls of the first movable plate, and the side walls of each connecting rod are sleeved with a fourth spring, the upper end of the connecting rod is fixedly connected to the second movable block, and the movement of the second movable block is driven by the second pushing mechanism.

[0015] Preferably, the second pushing mechanism includes a guide rail fixedly connected to the top of the connecting plate, and a pushing block is slidably connected to the guide rail, the pushing block includes an inclined surface, and the side wall of the pushing block is fixedly connected to the first pushing rod and the second pushing rod, and the side wall of the second moving block is fixedly connected to the pushing pin.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The microbial sampling detector of the air outlet system of the biological detection safety cabinet is provided with a first driving mechanism and a second driving mechanism. When in use, the infectious aerosol and splashes are absorbed through the air inlet, and enter the high-efficiency air filter through the air inlet pipe for filtration. The filtered air enters the sampling detection box and enters the safety cabinet body again through the air outlet pipe and the air outlet. At the same time, the electrostatic plate is started. At this time, if the filtering effect of the high-efficiency air filter deteriorates or is damaged, the microorganisms in the gas can be adsorbed on the top of the collection plate. Then, the first motor is started, and the first The rotation of the motor drives the rotation of the first threaded rod, thereby moving the first moving plate. At the same time, the second motor is started, and the rotation of the second motor drives the rotation of the second threaded rod, thereby making the second moving plate reciprocate along the second guide rod, and driving the sampling cotton to move through the moving rod. In this way, the sampling cotton can slide in an "S" shape on the top of the collection plate to achieve the sampling operation, and when the second moving plate reciprocates, the moving rod can be driven to rotate through the rack and gear, and the rotation of the moving rod drives the rotation of the sampling cotton, thereby making the sampling efficiency higher and the effect better. When the push plate abuts against the side wall of the inclined plate, the first moving block and the electron microscope can be pushed upward. At the same time, the reset spring is compressed. When the sampling cotton moves to the top of the slide, one end of the moving rod abuts against the inner wall of the sampling detection box. When the first moving plate continues to move, the first spring is gradually compressed. At the same time, the rack and the gear are separated. After the visual sensor detects that the rack and the gear are separated, the electromagnet is powered off. After the electromagnet is powered off, the third moving plate can move away from the supporting plate under the action of the third spring, and the sliding pin is inserted into the sliding groove. When the second moving plate continues to move When the moving rod is moved, the sliding pin can slide in the sliding groove and push the moving rod to rotate. The rotation of the moving rod drives the sampling cotton to rotate, so that the microorganisms sampled on the surface of the sampling cotton can be smeared on the glass slide. Then, the sampling cotton is moved away from the top of the glass slide by the first moving mechanism and the second moving mechanism. At this time, the surface of the glass slide is detected by an electron microscope and displayed by an external display to determine whether there are microorganisms in the filtered air, thereby determining the filtering effect and damage of the high-efficiency air filter, making the sampling and detection of microorganisms in the air outlet system more convenient and quick;By setting up a second pushing mechanism, when testing, after the sampling cotton has completed its rotation on the top of the glass slide, when one end of the first pushing rod abuts against the inner wall of the sampling testing box, the pushing block is pushed to slide along the guide rail, and at the same time, the pushing pin is pushed to slide along the inclined surface to the top of the pushing block, so that the second moving block moves upward, and the sliding block is driven to move upward through the connecting rod. At the same time, the fourth spring is compressed, and drives the second moving plate and the sampling cotton to move upward, so that the sampling cotton is separated from the top of the glass slide, so that when the sampling cotton is removed from the top of the glass slide , which can prevent it from taking away the microorganisms on the top of the slide, ensuring the accuracy of the detection structure. After the first movable plate moves and resets, when the second push rod abuts against the inner wall of the other side of the sampling and detection box, it can push the push block to move and reset along the guide rail. At this time, the push pin slides from the top of the push block to the inclined surface, and gradually separates from the push block after sliding downward along the inclined surface. At this time, the sliding block can move downward and reset under the action of the fourth spring, and drive the second movable plate and the sampling cotton to move downward and reset, and make the sampling cotton abut against the top of the collection plate for subsequent detection. ; BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the use state of the present invention;

[0019] Figure 2 It is a schematic diagram of the position of the sampling and testing box in the present invention;

[0020] Figure 3 It is a partial cross-sectional structural schematic diagram of the sampling and testing box in the present invention;

[0021] Figure 4 It is a structural schematic diagram of the telescopic mechanism in the present invention;

[0022] Figure 5 for Figure 3 A schematic diagram of the enlarged structure at A in the middle;

[0023] Figure 6 for Figure 4 A schematic diagram of the enlarged structure at B in the middle;

[0024] Figure 7 for Figure 5 Schematic diagram of the enlarged structure at C in the middle;

[0025] Figure 8 for Figure 6 Schematic diagram of the enlarged structure at D in the middle;

[0026] Fig. 9 for Figure 7 Schematic diagram of the enlarged structure at E in the middle.

[0027] In the figure: 1. safe cabinet body; 101. air inlet; 102. air outlet; 103. air inlet pipe; 104. air outlet pipe; 2. first moving mechanism; 201. first guide rod; 202. first threaded rod; 203. first motor; 3. second moving mechanism; 301. sliding block; 302. second guide rod; 303. second threaded rod; 304. second motor; 4. first driving mechanism; 401. connecting frame; 402. rack; 403. gear; 5. second driving mechanism; 501. sliding groove; 502. sliding pin; 6. third moving mechanism; 601. support plate; 602. T-shaped guide rod; 603. third moving plate; 604. third spring; 605. electromagnet; 606. iron block; 607. mounting block; 608. visual Sensor; 7. Reset mechanism; 701. Connecting plate; 702. Connecting rod; 703. Second moving block; 704. Fourth spring; 8. Second pushing mechanism; 801. Push pin; 802. Guide rail; 803. Push block; 804. Inclined surface; 805. First pushing rod; 806. Second pushing rod; 9. Telescopic mechanism; 901. Sleeve; 902. Sleeve rod; 903. Reset spring; 10. First pushing mechanism; 1001. Inclined plate; 1002. Push plate; 11. Sampling and testing box; 12. Electrostatic plate; 13. Collection plate; 14. Connecting block; 15. First moving plate; 16. Second moving plate; 17. Moving rod; 18. Sampling cotton; 19. First spring; 20. First moving block; 21. Electron microscope; 22. Glass slide. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] See also Figure 1-Figure 9The present invention provides a technical solution: a microbial sampling detector of an air outlet system of a biological detection safety cabinet, comprising an air inlet 101, an air inlet pipe 103, an air outlet 102 and an air outlet pipe 104 arranged on a safety cabinet body 1, a sampling detection box 11 is fixedly connected between the air outlet pipe 104 and the air inlet pipe 103, an electrostatic method: an electrostatic precipitation sampler uses a high-voltage electrostatic field to charge microbial particles in the air, and then they are adsorbed by a collection surface with an opposite charge, and an electrostatic plate 12 is fixedly connected to the top of the sampling detection box 11, and a collection plate 13 is inserted at the bottom of the sampling detection box 11, the electrostatic plate 12 and the collection plate 13 are well-known technologies of the present technology and are not described in detail here, and a plurality of connecting blocks 14 are fixedly connected to the bottom of the collection plate 13, and the connecting blocks 14 are detachably connected to the inner wall of the sampling detection box 11 by bolts, and a first movable plate 15 is connected to the sampling detection box 11 by a first movable mechanism 2, and the side wall of the first movable plate 15 is connected by a second movable mechanism 2. The mechanism 3 is connected to a second movable plate 16, and a movable rod 17 is inserted into the side wall of the second movable plate 16, one end of the movable rod 17 is detachably connected to a sampling cotton 18, and a first spring 19 is sleeved on the side wall of the movable rod 17, the end of the first spring 19 can slide on the side wall of the second movable plate 16, and the rotation of the movable rod 17 is driven by the first driving mechanism 4 and the second driving mechanism 5. The top of the sampling and testing box 11 is connected to a first movable block 20 through a telescopic mechanism 9, and an electron microscope 21 is fixedly inserted at the bottom of the first movable block 20, and a glass slide 22 is embedded in the top of the collection plate 13. The electron microscope 21 and the glass slide 22 are well-known technologies in the technical field and are not described here. The movement of the first movable block 20 is pushed by the first pushing mechanism 10, which is convenient for sampling and testing of microorganisms in the air outlet system, thereby determining the filtering effect and damage of the high-efficiency air filter, making the sampling and testing of microorganisms in the air outlet system more convenient and quick.

[0030] See also Figure 4 The telescopic mechanism 9 includes two symmetrically arranged sleeves 901 fixedly connected to the top of the sampling and detection box 11, and a sleeve rod 902 is inserted into the sleeve 901. The lower end of the sleeve rod 902 is fixed to the top of the first moving block 20, and the side wall of each sleeve 901 is sleeved with a reset spring 903, which guides and resets the movement of the first moving block 20.

[0031] See also Figure 4-Figure 6 The first pushing mechanism 10 includes an inclined plate 1001 fixedly connected to the side wall of the first moving block 20, and the side wall of the first moving plate 15 is fixedly connected with a pushing plate 1002. When the pushing plate 1002 abuts against the side wall of the inclined plate 1001, it can push the first moving block 20 and the electron microscope 21 to move upward, and at the same time, the return spring 903 is compressed.

[0032] See also Figure 4 and Figure 5 The first moving mechanism 2 includes a first guide rod 201 fixedly connected to the inner wall of the sampling and testing box 11, and the first moving plate 15 is sleeved on the side wall of the first guide rod 201. The inner wall of the sampling and testing box 11 is rotatably connected with the first threaded rod 202, and the first moving plate 15 is threadedly connected to the side wall of the first threaded rod 202. The side wall of the sampling and testing box 11 is fixedly connected with a first motor 203, and the output end of the first motor 203 is fixed to one end of the first threaded rod 202. The first motor 203 is started, and the rotation of the first motor 203 drives the rotation of the first threaded rod 202, thereby moving the first moving plate 15.

[0033] See also Figure 5 and Figure 6 The second moving mechanism 3 includes two symmetrically arranged sliding blocks 301 slidably connected to the side walls of the first moving plate 15, each sliding block 301 is connected to the side wall of the first moving plate 15 through a reset mechanism 7, and the opposite side walls of the two sliding blocks 301 are fixedly connected with a second guide rod 302, the second moving plate 16 is sleeved on the side wall of the second guide rod 302, and the opposite side walls of the two sliding blocks 301 are rotatably connected with a second threaded rod 303, the second moving plate 16 is threadedly connected to the second threaded rod 303, a side wall of one of the sliding blocks 301 is fixedly connected with a second motor 304, and the output end of the second motor 304 is fixed to one end of the second threaded rod 303, the second motor 304 is started, and the rotation of the second motor 304 drives the rotation of the second threaded rod 303, so that the second moving plate 16 reciprocates along the second guide rod 302.

[0034] See also Figure 5 , Figure 7 and Fig. 9 The first driving mechanism 4 includes a connecting frame 401 fixedly connected to the bottom of the sliding block 301, a rack 402 is fixedly connected to the side wall of the connecting frame 401, and a gear 403 is fixedly sleeved on the side wall of the moving rod 17. When the second moving plate 16 reciprocates, the moving rod 17 can be driven to rotate through the rack 402 and the gear 403. The rotation of the moving rod 17 drives the rotation of the sampling cotton 18, thereby making the sampling efficiency higher and the effect better.

[0035] See also Fig. 9The second driving mechanism 5 includes a spirally arranged sliding groove 501 opened on the side wall of the moving rod 17, and the side wall of the second moving plate 16 is connected with a sliding pin 502 through the third moving mechanism 6. When the sampling cotton 18 moves to the top of the slide 22, one end of the moving rod 17 is abutted against the inner wall of the sampling detection box 11. When the first moving plate 15 continues to move, the first spring 19 is gradually compressed. At the same time, the rack 402 and the gear 403 are disengaged. After the visual sensor 608 detects that the rack 402 is separated from the gear 403, the sliding pin 502 is inserted into the sliding groove 501 through the third moving mechanism 6. When the second moving plate 16 continues to move, the sliding pin 502 can slide in the sliding groove 501 and push the moving rod 17 to rotate. The rotation of the moving rod 17 drives the sampling cotton 18 to rotate.

[0036] See also Fig. 9 The third moving mechanism 6 includes a support plate 601 fixedly connected to the side wall of the second moving plate 16, and two symmetrically arranged T-shaped guide rods 602 are inserted into the side wall of the support plate 601, one end of the T-shaped guide rod 602 is fixedly connected to the third moving plate 603, and the sliding pin 502 is fixed to the side wall of the third moving plate 603, and the side wall of each T-shaped guide rod 602 is sleeved with a third spring 604, the side wall of the support plate 601 is fixedly connected to an electromagnet 605, and the side wall of the third moving plate 603 is fixedly connected to an iron block 606, the side wall of the second moving plate 16 is fixedly connected to a mounting block 607, and the side wall of the mounting block 607 is fixedly inserted with a visual sensor 608, the sliding pin 502 is inserted into the sliding groove 501, when the second moving plate 16 continues to move, the sliding pin 502 can slide in the sliding groove 501, and push the moving rod 17 to rotate, and the rotation of the moving rod 17 drives the sampling cotton 18 to rotate.

[0037] See also Figure 6 and Figure 8 The reset mechanism 7 includes two symmetrically arranged connecting rods 702 fixedly connected to the top of each sliding block 301, and the side walls of the connecting rods 702 are sleeved with connecting plates 701, the connecting plates 701 are fixed to the side walls of the first movable plate 15, and the side walls of each connecting rod 702 are sleeved with fourth springs 704, the upper ends of the connecting rods 702 are fixedly connected to the second movable blocks 703, and the movement of the second movable blocks 703 is pushed by the second pushing mechanism 8, which guides and resets the movement of the sliding blocks 301.

[0038] See also Figure 6 and Figure 8The second pushing mechanism 8 includes a guide rail 802 fixedly connected to the top of the connecting plate 701, and a pushing block 803 is slidably connected to the guide rail 802, the pushing block 803 includes an inclined surface 804, and the side wall of the pushing block 803 is fixedly connected with a first pushing rod 805 and a second pushing rod 806, and the side wall of the second moving block 703 is fixedly connected with a pushing pin 801. When testing, after the sampled cotton 18 rotates on the top of the slide 22, when one end of the first pushing rod 805 abuts against the inner wall of the sampling and testing box 11, the pushing block 803 is pushed to slide along the guide rail 802, and at the same time, the pushing pin 801 is pushed to slide along the inclined surface 804 to the top of the pushing block 803, so that the second moving block 703 moves upward, and drives the sliding block 301 to move upward through the connecting rod 702. At the same time, the fourth spring 704 is compressed, and drives the fourth spring 704 to move upward. The second movable plate 16 and the sampling cotton 18 move upward, so that the sampling cotton 18 is separated from the top of the glass slide 22, so that when the sampling cotton 18 is removed from the top of the glass slide 22, it can prevent it from taking away the microorganisms on the top of the glass slide 22, thereby ensuring the accuracy of the detection structure. After the first movable plate 15 moves and resets, when the second pushing rod 806 abuts against the inner wall of the other side of the sampling detection box 11, it can push the pushing block 803 to move and reset along the guide rail 802. At this time, the pushing pin 801 slides from the top of the pushing block 803 to the inclined surface 804, and slides downward along the inclined surface 804 and gradually separates from the pushing block 803. At this time, the sliding block 301 can move downward and reset under the action of the fourth spring 704, and drive the second movable plate 16 and the sampling cotton 18 to move downward and reset, and make the sampling cotton 18 abut against the top of the collection plate 13 for subsequent detection.

[0039] Working principle: When in use, infectious aerosols and splashes are absorbed through the air inlet 101, and enter the high-efficiency air filter through the air inlet pipe 103 for filtration. The filtered air enters the sampling and detection box 11, and enters the safety cabinet body 1 again through the air outlet pipe 104 and the air outlet 102. At the same time, the electrostatic plate 12 is started. At this time, if the filtering effect of the high-efficiency air filter deteriorates or is damaged, the microorganisms in the gas can be adsorbed on the top of the collection plate 13. Then, the first motor 203 is started. The rotation of the first motor 203 drives the rotation of the first threaded rod 202, so that the first movable plate 15 moves. At the same time, the second motor 304 is started. The rotation of the second motor 304 drives the rotation of the second threaded rod 303, so that the second movable plate 16 reciprocates along the second guide rod 302, and drives the sampling cotton 18 to move through the moving rod 17. In this way, the sampling cotton 18 can slide in an "S" shape on the top of the collection plate 13 to achieve the sampling operation;

[0040] At the same time, when the second movable plate 16 reciprocates, the movable rod 17 can be driven to rotate through the rack 402 and the gear 403. The rotation of the movable rod 17 drives the rotation of the sampling cotton 18, so that the sampling efficiency is higher and the effect is better. When the pushing plate 1002 abuts against the side wall of the inclined plate 1001, the first movable block 20 and the electron microscope 21 can be pushed to move upward. At the same time, the reset spring 903 is compressed. When the sampling cotton 18 moves to the top of the slide 22, one end of the movable rod 17 abuts against the inner wall of the sampling detection box 11. When the first movable plate 15 continues to move, the first spring 19 is gradually compressed. When the rack 402 and the gear 403 are separated, the visual sensor 608 detects that the rack 402 and the gear 403 are separated, and the electromagnet 605 is powered off. After the electromagnet 605 is powered off, the third movable plate 603 can move away from the support plate 601 under the action of the third spring 604, and the sliding pin 502 is inserted into the sliding groove 501. When the second movable plate 16 continues to move, the sliding pin 502 can slide in the sliding groove 501 and push the moving rod 17 to rotate. The rotation of the moving rod 17 drives the sampling cotton 18 to rotate, so that the microorganisms sampled on the surface of the sampling cotton 18 can be smeared on the slide glass 22;

[0041] After the sampling cotton 18 has completed its rotation on the top of the glass slide 22, when one end of the first pushing rod 805 abuts against the inner wall of the sampling detection box 11, the pushing block 803 is pushed to slide along the guide rail 802, and at the same time, the pushing pin 801 is pushed to slide along the inclined surface 804 to the top of the pushing block 803, so that the second moving block 703 moves upward, and the sliding block 301 is driven to move upward through the connecting rod 702. At the same time, the fourth spring 704 is compressed, and drives the second moving plate 16 and the sampling cotton 18 to move upward, so that the sampling cotton 18 is separated from the top of the glass slide 22, so that when the sampling cotton 18 is removed from the top of the glass slide 22, it can be prevented from taking away the microorganisms on the top of the glass slide 22, thereby ensuring the accuracy of the detection structure;

[0042] Then, the surface of the glass slide 22 is detected by an electron microscope 21 and displayed on an external display to determine whether there are microorganisms in the filtered air, thereby determining the filtering effect and damage of the high-efficiency air filter, making the sampling and detection of microorganisms in the air outlet system more convenient and quick;

[0043] After the first movable plate 15 moves and resets, when the second pushing rod 806 abuts against the inner wall of the other side of the sampling and detection box 11, it can push the pushing block 803 to move and reset along the guide rail 802. At this time, the pushing pin 801 slides from the top of the pushing block 803 to the inclined surface 804, and slides downward along the inclined surface 804 and gradually separates from the pushing block 803. At this time, the sliding block 301 can move downward and reset under the action of the fourth spring 704, and drive the second movable plate 16 and the sampling cotton 18 to move downward and reset, and make the sampling cotton 18 abut against the top of the collection plate 13 for subsequent detection.

Claims

1. A microbial sampling detector of an air outlet system of a biological detection safety cabinet, comprising an air inlet (101), an air inlet pipe (103), an air outlet (102) and an air outlet pipe (104) arranged on a safety cabinet body (1), characterized in that: A sampling detection box (11) is fixedly connected between the air outlet pipe (104) and the air inlet pipe (103), and an electrostatic plate (12) is fixedly connected to the top of the sampling detection box (11), a collection plate (13) is inserted at the bottom of the sampling detection box (11), and a plurality of connection blocks (14) are fixedly connected to the bottom of the collection plate (13), and the connection blocks (14) are detachably connected to the inner wall of the sampling detection box (11) via bolts, and a first movable plate (15) is connected to the inside of the sampling detection box (11) via a first movable mechanism (2), and a side wall of the first movable plate (15) is connected to a second movable plate (16) via a second movable mechanism (3), and a movable rod ( 17), one end of the moving rod (17) is detachably connected to a sampling cotton (18), and a first spring (19) is sleeved on the side wall of the moving rod (17), and the end of the first spring (19) can slide on the side wall of the second moving plate (16), and the rotation of the moving rod (17) is driven by a first driving mechanism (4) and a second driving mechanism (5), the top of the sampling and detection box (11) is connected to a first moving block (20) through a telescopic mechanism (9), and an electron microscope (21) is fixedly inserted at the bottom of the first moving block (20), a glass slide (22) is embedded on the top of the collection plate (13), and the movement of the first moving block (20) is driven by a first pushing mechanism (10); The telescopic mechanism (9) comprises two symmetrically arranged sleeves (901) fixedly connected to the top of the sampling and testing box (11), and a sleeve rod (902) is inserted into the sleeve (901), the lower end of the sleeve rod (902) is fixed to the top of the first moving block (20), and the side wall of each sleeve (901) is sleeved with a return spring (903), the first pushing mechanism (10) comprises an inclined plate (1001) fixedly connected to the side wall of the first moving block (20), and the side wall of the first moving plate (15) is fixedly connected to the pushing plate (1002), the first moving mechanism (2) comprises a first guide rod (201) fixedly connected to the inner side wall of the sampling and testing box (11), and the first moving plate (15) is sleeved on the first guide rod ( The first threaded rod (202) is rotatably connected to the inner side wall of the sampling and testing box (11), and the first movable plate (15) is threadedly connected to the side wall of the first threaded rod (202). The first motor (203) is fixedly connected to the side wall of the sampling and testing box (11), and the output end of the first motor (203) is fixedly connected to one end of the first threaded rod (202). The second moving mechanism (3) comprises two symmetrically arranged sliding blocks (301) slidably connected to the side wall of the first movable plate (15), each of the sliding blocks (301) is connected to the side wall of the first movable plate (15) via a reset mechanism (7), and the opposite side walls of the two sliding blocks (301) are fixedly connected to the second guide rod (302). The two movable plates (16) are sleeved on the side walls of the second guide rod (302), and the opposite side walls of the two sliding blocks (301) are rotatably connected to the second threaded rod (303), the second movable plate (16) is threadedly connected to the second threaded rod (303), the side wall of one of the sliding blocks (301) is fixedly connected to the second motor (304), and the output end of the second motor (304) is fixed to one end of the second threaded rod (303), the first driving mechanism (4) comprises a connecting frame (401) fixedly connected to the bottom of the sliding block (301), the side wall of the connecting frame (401) is fixedly connected to the rack (402), and the side wall of the movable rod (17) is fixedly sleeved with a gear (403), the second driving mechanism (5) comprises A spirally arranged sliding groove (501) is provided on the side wall of the moving rod (17), and the side wall of the second moving plate (16) is connected to a sliding pin (502) via a third moving mechanism (6), the third moving mechanism (6) comprises a support plate (601) fixedly connected to the side wall of the second moving plate (16), and two symmetrically arranged T-shaped guide rods (602) are inserted into the side wall of the support plate (601), one end of the T-shaped guide rod (602) is fixedly connected to the third moving plate (603), and the sliding pin (502) is fixed to the side wall of the third moving plate (603), the side wall of each of the T-shaped guide rods (602) is sleeved with a third spring (604), and the side wall of the support plate (601) is fixedly connected to an electromagnet (605),The side wall of the third movable plate (603) is fixedly connected to an iron block (606), the side wall of the second movable plate (16) is fixedly connected to a mounting block (607), and the side wall of the mounting block (607) is fixedly inserted with a visual sensor (608), the reset mechanism (7) comprises two symmetrically arranged connecting rods (702) fixedly connected to the top of each sliding block (301), and the side wall of the connecting rod (702) is sleeved with a connecting plate (701), the connecting plate (701) is fixed to the side wall of the first movable plate (15), and the side wall of each connecting rod (702) is sleeved with a fourth spring (704), The upper end of the connecting rod (702) is fixedly connected to a second moving block (703), and the movement of the second moving block (703) is driven by a second driving mechanism (8); the second driving mechanism (8) comprises a guide rail (802) fixedly connected to the top of the connecting plate (701), and a driving block (803) is slidably connected to the guide rail (802), the driving block (803) comprises an inclined surface (804), and a first driving rod (805) and a second driving rod (806) are fixedly connected to the side wall of the driving block (803), and a driving pin (801) is fixedly connected to the side wall of the second moving block (703).

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