A sterile sampling device for liquid pipeline

Abstract

The present invention provides a sterile sampling device for liquid pipelines, which belongs to the field of sampling technology and is used to solve the problem that samples in existing liquid pipelines are easily infected during the sampling process. The device comprises a fixing assembly, which comprises a fixing ring, which is fixed on a delivery pipe, a sealing box is fixed on the side of the fixing ring, a sampling tube is fixed on the sealing box, one end of the sampling tube penetrates and extends into the interior of the delivery pipe, a control valve is fixed on the sampling tube, a mounting plate is fixed on the other end of the sampling tube, the mounting plate is fixed inside the sealing box, a drainage joint is fixed below the mounting plate, a plurality of ultraviolet lamps are fixed inside the sealing box, a mirror film is provided on the inner wall of the sealing box, a sealing door is hinged on the side of the sealing box, a handle and a control panel are provided on the sealing door, and a pressing assembly and a conversion assembly are provided inside the sealing box; the present invention can prevent samples in liquid pipelines from being infected during the sampling process.

Description

Technical Field

[0001] The invention belongs to the technical field of sampling, and relates to a sampling device, in particular to a sterile sampling device for liquid pipelines. Background Art

[0002] During the manufacturing process, finished products or semi-finished products will be sampled and tested. Through sampling and testing, the production process can be adjusted in time according to the quality of the samples, so as to control the quality of the products. A sampler is a sampling device that can be used to facilitate sample collection.

[0003] In the production process of liquid food or medicine, it is often necessary to sample and inspect the liquid inside the pipeline. The conventional sampling method is to sample by connecting a sampling valve to the pipeline. The sampling valve is convenient for sampling, but during the sampling process, the sample will come into contact with the air, which is easy to cause infection. In addition, the external liquid outlet of the sampling valve is exposed to the air for a long time, which is easy to be infected by bacteria. Therefore, we propose a sterile sampling device for liquid pipelines to prevent samples from being infected. Summary of the invention

[0004] The purpose of the present invention is to solve the above problems in the prior art and to propose a sterile sampling device for liquid pipelines. The technical problem to be solved by the device is: how to prevent the sample from being infected during the sampling process of the liquid pipeline.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A sterile sampling device for a liquid pipeline comprises a fixing assembly, wherein the fixing assembly comprises a fixing ring, the fixing ring is fixed on a delivery pipe, a sealing box is fixed on the side of the fixing ring, a sampling tube is fixed on the sealing box, one end of the sampling tube extends through the interior of the delivery pipe, a control valve is fixed on the sampling tube, a mounting plate is fixed on the other end of the sampling tube, the mounting plate is fixed inside the sealing box, a drain joint is fixed below the mounting plate, the drain joint is connected to the sampling tube, a plurality of ultraviolet lamps are fixed inside the sealing box, a mirror film is provided on the inner wall of the sealing box, a sealing door is hinged on the side of the sealing box, a handle and a control panel are provided on the sealing door, and a pressing assembly and a conversion assembly are provided inside the sealing box.

[0007] The working principle of the present invention is: open the sealing door, put two sampling vessels above the conversion component, close the sealing door, start the control component through the control panel, so as to extract the air inside the sealed box to form a vacuum environment, turn on a number of ultraviolet lamps to sterilize the inside of the sealed box, the mirror film anti-corrosion refracts ultraviolet rays, and improves the sterilization effect of ultraviolet rays, open the control valve, discharge the liquid inside the sampling tube into the sampling vessel, discard the flow, and then close the control valve to prevent the liquid accumulated in the sampling tube from affecting the sampling effect, press the conversion component with the pressing component, and the conversion component drives the two samplers The dish rotates to swap the positions of the two sampling vessels, and the control valve is opened again to discharge the liquid in the sampling tube into the sampling vessel for sampling. Then the control valve is closed, and the pressing assembly presses the conversion assembly. The conversion assembly drives the two sampling vessels to rotate and swap the positions of the two sampling vessels. At the same time, the sampling vessels containing the sampling liquid are sealed to avoid contact with the air during transfer, thereby causing contamination. Open the control panel control component to start, and inject air into the interior of the sealed box to balance the internal and external pressure difference. Then the sealing door is opened, and the two sampling vessels are taken out to complete the sterile sampling.

[0008] A vacuum pump and an air intake pump are fixed above the sealing box. The air intake end of the vacuum pump is connected to the sealing box. A filter screen is fixed to the air outlet end of the vacuum pump. The air outlet end of the air intake pump is connected to the sealing box. A filter box is fixed to the air outlet end of the air intake pump. The filter box is located inside the sealing box.

[0009] With the above structure, the vacuum pump is started by controlling the control panel to extract the air inside the sealed box to form a vacuum environment. The filter prevents external bacteria from entering the sealed box. The control panel is opened to control the air intake pump to start, and air is injected into the sealed box to balance the pressure difference between the inside and the outside. The filter box filters the bacteria in the air to prevent external bacteria from entering the sealed box.

[0010] The pressing assembly includes an electric push rod and a sealing plug. The electric push rod is fixed inside the sealing box. An L-shaped plate is fixed at the end of the electric push rod. A connecting plate is fixed at the end of the L-shaped plate. A connecting column is fixed below the connecting plate. The sealing plug is detachably mounted on the connecting column. A suction cup groove is provided below the sealing plug. A baffle is adsorbed below the sealing plug. The baffle is preferably made of plastic.

[0011] With the above structure, the sealing plug is sleeved on the connecting column, and the baffle is adsorbed under the sealing plug. The electric push rod extends to drive the L-shaped plate to move downward, the L-shaped plate drives the connecting plate to move downward, the connecting plate drives the connecting column to move downward, the connecting column drives the sealing plug to move downward, and the sealing plug drives the baffle to move downward.

[0012] The conversion assembly includes a fixed cylinder, which is fixed inside the sealing box. A rotating disk is rotatably arranged above the fixed cylinder, a rotating cylinder and two sleeve rods are fixed below the rotating disk, the rotating cylinder is located between the two sleeve rods, two spiral grooves and two straight grooves are provided above the rotating cylinder, the two ends of the two spiral grooves are respectively connected to the upper end and the lower end of the two straight grooves, the depth of the lower end of the spiral groove is lower than that of the straight groove, and the depth of the upper end of the spiral groove is the same as that of the straight groove, the ends of the two sleeve rods are located above the rotating disk, the ends of the two sleeve rods are fixed with placement cylinders, and a rotating plate is fixed between the two placement cylinders.

[0013] With the above structure, the placement cylinder drives the rotating plate to descend. When the electric push rod contracts, it drives the L-shaped plate to move upward, releasing the squeeze on the rotating plate. The component rebounds and drives the rotating cylinder to rotate. The rotating cylinder drives the rotating disk to rotate. The rotating disk drives the two sleeve rods to rotate, thereby switching the positions of the two sampling vessels.

[0014] The rotating disk and the rotating cylinder are both provided with connecting holes, a round rod is rotatably arranged inside the connecting hole, the upper end of the round rod is rotatably arranged on the rotating plate, an L-shaped connecting rod is fixed to the lower end of the round rod, a first spring is fixed below the L-shaped connecting rod, the first spring is fixed to the bottom of the fixed cylinder, a sliding sleeve rod is fixed on the L-shaped connecting rod, a second spring is arranged inside the sliding sleeve rod, and the end of the sliding sleeve rod is slidably arranged inside the spiral groove and the straight groove.

[0015] With the above structure, the rotating plate drives the round rod to descend, the round rod drives the L-shaped connecting rod to descend, the L-shaped connecting rod drives the sliding sleeve rod to slide inside the straight groove, and when the sliding sleeve rod slides into the spiral groove, the second spring drives the sliding sleeve rod to extend, thereby causing the end of the sliding sleeve rod to contact the inside of the spiral groove. At the same time, the L-shaped connecting rod compresses the first spring downward.

[0016] A discard test tube and a sampling test tube are respectively placed inside the two placement tubes. The discard test tube is longer than the sampling test tube. A circular plate is fixed inside the discard test tube, and the end of the discard test tube is flush with the baffle.

[0017] With the above structure, the baffle squeezes the sampling tube, and the sampling tube squeezes the placement tube, thereby switching the positions of the discard tube and the sampling tube, and the discard tube squeezes the baffle, so that the baffle is separated from the sealing plug.

[0018] The control panel is electrically connected to the vacuum pump, the air intake pump, the control valve, the ultraviolet lamp and the electric push rod.

[0019] With the above structure, the control panel can control the start and stop of the vacuum pump, air intake pump, control valve, ultraviolet lamp and electric push rod.

[0020] Compared with the prior art, the aseptic sampling device for liquid pipelines has the following advantages:

[0021] 1. Through the cooperation of the fixed component and the conversion component, the air inside the sealed box can be extracted to prevent the sample from contacting bacteria in the air during the sampling process. At the same time, through the cooperation of ultraviolet rays and the mirror film, the ultraviolet rays can be reciprocated and refracted to sterilize the inside of the sealed box to avoid infection in the sampling tube, thereby preventing the sample from being infected during the sampling process;

[0022] 2. The conversion component and the downward pressure component can cooperate to automatically switch the positions of the discarded liquid test tube and the sampling liquid test tube, so that the discarded liquid and the sampling liquid can be automatically collected. After that, the sampling tube is sealed to prevent bacteria in the external air from contaminating the sampling liquid during transfer. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0024] Figure 2 It is a schematic diagram of the expanded structure of some components in the present invention;

[0025] Figure 3 yes Figure 2 A schematic diagram of the front view structure of

[0026] Figure 4 It is a front view structural schematic diagram of a local component in the present invention;

[0027] Figure 5 It is a three-dimensional structural schematic diagram of a local component in the present invention;

[0028] Figure 6 It is a schematic diagram of the cross-sectional structure of some components in the present invention;

[0029] In the figure: 1. conveying pipe; 2. fixing ring; 3. sealing door; 4. control panel; 5. vacuum pump; 6. air intake pump; 7. sealing box; 8. control valve; 9. mirror film; 10. ultraviolet lamp; 11. fixing cylinder; 12. handle; 13. filter screen; 14. drain joint; 15. discard flow test tube; 16. round rod; 17. sleeve rod; 18. rotating disk; 19. placement cylinder; 20. filter box; 21. connecting plate; 22. sampling tube; 23. L-shaped plate; 24. rotating plate; 25. rotating cylinder; 26. spiral groove; 27. first spring; 28. L-shaped connecting rod; 29. ​​sampling test tube; 30. sealing plug; 31. connecting column; 32. mounting plate; 33. electric push rod; 34. straight groove; 35. sliding sleeve rod; 36. circular ring plate; 37. baffle. DETAILED DESCRIPTION

[0030] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0031] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0032] In the description of this patent, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing this patent and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this patent.

[0033] In the description of this patent, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be fixedly connected or set, or it can be detachably connected or set, or connected or set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0034] See also Figure 1-6 The present embodiment provides a sterile sampling device for a liquid pipeline, including a fixing component, the fixing component including a fixing ring 2, the fixing ring 2 is fixed on the delivery pipe 1, a sealing box 7 is fixed on the side of the fixing ring 2, a sampling tube 22 is fixed on the sealing box 7, one end of the sampling tube 22 penetrates and extends into the interior of the delivery pipe 1, a control valve 8 is fixed on the sampling tube 22, a mounting plate 32 is fixed on the other end of the sampling tube 22, the mounting plate 32 is fixed in the interior of the sealing box 7, a drain joint 14 is fixed below the mounting plate 32, the drain joint 14 is connected with the sampling tube 22, a plurality of ultraviolet lamps 10 are fixed in the interior of the sealing box 7, a mirror film 9 is provided on the inner wall of the sealing box 7, a sealing door 3 is hinged on the side of the sealing box 7, a handle 12 and a control panel 4 are provided on the sealing door 3, and a pressing component and a conversion component are provided in the interior of the sealing box 7.

[0035] Open the sealed door 3, put two sampling vessels on top of the conversion assembly, close the sealed door 3, start the control component through the control panel 4, so as to extract the air inside the sealed box 7 to form a vacuum environment, turn on a number of ultraviolet lamps 10, sterilize the inside of the sealed box 7, the mirror film 9 anti-corrosion refracts ultraviolet rays, and improves the sterilization effect of ultraviolet rays, open the control valve 8, discharge the liquid in the sampling tube 22 into the sampling vessel, and then close the control valve 8 to prevent the liquid accumulated in the sampling tube 22 from affecting the sampling effect, press the conversion assembly, and the conversion assembly drives the two sampling vessels into The two sampling vessels are rotated to exchange the positions, and the control valve 8 is opened again to discharge the liquid in the sampling tube 22 into the sampling vessel for sampling. Then the control valve 8 is closed, and the pressing assembly presses the conversion assembly. The conversion assembly drives the two sampling vessels to rotate and exchange the positions of the two sampling vessels. At the same time, the sampling vessels containing the sampling liquid are blocked to avoid contact with the air during transfer, thereby causing contamination. The control panel 4 is opened to start the control component, and air is injected into the sealing box 7 to balance the internal and external pressure difference. Then the sealing door 3 is opened to take out the two sampling vessels to complete the sterile sampling.

[0036] A vacuum pump 5 and an air intake pump 6 are fixed above the sealed box 7, the air intake end of the vacuum pump 5 is connected to the sealed box 7, a filter screen 13 is fixed to the air outlet end of the vacuum pump 5, the air outlet end of the air intake pump 6 is connected to the sealed box 7, a filter box 20 is fixed to the air outlet end of the air intake pump 6, and the filter box 20 is located inside the sealed box 7; the vacuum pump 5 is started by controlling the control panel 4 to extract the air inside the sealed box 7 to form a vacuum environment, and the filter screen 13 prevents external bacteria from entering the sealed box 7, the control panel 4 is opened to control the air intake pump 6 to start, and air is injected into the sealed box 7 to balance the internal and external pressure difference, and the filter box 20 filters bacteria in the air to prevent external bacteria from entering the sealed box 7.

[0037] The pressing assembly includes an electric push rod 33 and a sealing plug 30. The electric push rod 33 is fixed inside the sealing box 7. The end of the electric push rod 33 is fixed with an L-shaped plate 23. The end of the L-shaped plate 23 is fixed with a connecting plate 21. A connecting column 31 is fixed below the connecting plate 21. The sealing plug 30 is detachably mounted on the connecting column 31. A suction cup groove is provided below the sealing plug 30. A baffle 37 is adsorbed below the sealing plug 30. The baffle 37 is preferably made of plastic. The sealing plug 30 is mounted on the connecting column 31, and the baffle 37 is adsorbed below the sealing plug 30. The electric push rod 33 extends to drive the L-shaped plate 23 to move downward. The L-shaped plate 23 drives the connecting plate 21 to move downward. The connecting plate 21 drives the connecting column 31 to move downward. The connecting column 31 drives the sealing plug 30 to move downward. The sealing plug 30 drives the baffle 37 to move downward.

[0038] The conversion assembly includes a fixed cylinder 11, which is fixed inside the sealing box 7. A rotating disk 18 is rotatably arranged above the fixed cylinder 11. A rotating cylinder 25 and two sleeve rods 17 are fixed below the rotating disk 18. The rotating cylinder 25 is located between the two sleeve rods 17. Two spiral grooves 26 and two straight grooves 34 are provided above the rotating cylinder 25. The two ends of the two spiral grooves 26 are respectively connected to the upper and lower ends of the two straight grooves 34. The depth of the lower end of the spiral groove 26 is lower than that of the straight groove 34, and the depth of the upper end of the spiral groove 26 is the same as that of the straight groove 34. The grooves 34 are the same, the ends of the two sleeve rods 17 are located above the rotating disk 18, the ends of the two sleeve rods 17 are fixed with placement tubes 19, and a rotating plate 24 is fixed between the two placement tubes 19; the placement tube 19 drives the rotating plate 24 to descend, and when the electric push rod 33 contracts and drives the L-shaped plate 23 to move upward, the squeezing of the rotating plate 24 is released, and the component rebounds and drives the rotating tube 25 to rotate, and the rotating tube 25 drives the rotating disk 18 to rotate, and the rotating disk 18 drives the two sleeve rods 17 to rotate, thereby switching the positions of the two sampling vessels.

[0039] The rotating disk 18 and the rotating cylinder 25 are both provided with connecting holes, and the round rod 16 is rotatably arranged inside the connecting hole. The upper end of the round rod 16 is rotatably arranged on the rotating plate 24, and the lower end of the round rod 16 is fixed with an L-shaped connecting rod 28, and a first spring 27 is fixed below the L-shaped connecting rod 28, and the first spring 27 is fixed to the bottom of the fixed cylinder 11. A sliding sleeve rod 35 is fixed on the L-shaped connecting rod 28, and a second spring is arranged inside the sliding sleeve rod 35. The end of the sliding sleeve rod 35 is slidably arranged inside the spiral groove 26 and the straight groove 34; the rotating plate 24 drives the round rod 16 to descend, and the round rod 16 drives the L-shaped connecting rod 28 to descend, and the L-shaped connecting rod 28 drives the sliding sleeve rod 35 to slide inside the straight groove 34. When the sliding sleeve rod 35 slides into the spiral groove 26, the second spring drives the sliding sleeve rod 35 to extend, thereby causing the end of the sliding sleeve rod 35 to contact the inside of the spiral groove 26. At the same time, the L-shaped connecting rod 28 compresses the first spring 27 downward.

[0040] A discard test tube 15 and a sampling test tube 29 are placed inside the two placement tubes 19 respectively. The discard test tube 15 is longer than the sampling test tube 29. A circular ring plate 36 is fixed inside the discard test tube 15, and the end of the discard test tube 15 is flush with the baffle 37; the baffle 37 squeezes the sampling test tube 29, and the sampling test tube 29 squeezes the placement tube 19, thereby switching the positions of the discard test tube 15 and the sampling test tube 29, and the discard test tube 15 squeezes the baffle 37, so that the baffle 37 is separated from the sealing plug 30.

[0041] The control panel 4 is electrically connected to the vacuum pump 5, the air intake pump 6, the control valve 8, the ultraviolet lamp 10 and the electric push rod 33; the control panel 4 can control the start and stop of the vacuum pump 5, the air intake pump 6, the control valve 8, the ultraviolet lamp 10 and the electric push rod 33.

[0042] Working principle of the present invention:

[0043] The sealing door 3 is opened, the discarded flow test tube 15 and the sampling test tube 29 are fixed inside the two placement cylinders 19, the sealing plug 30 is set on the connecting column 31, the baffle 37 is adsorbed under the sealing plug 30, the sealing door 3 is closed, and the vacuum pump 5 is controlled to start through the control panel 4, so as to extract the air inside the sealed box 7 to form a vacuum environment, and the filter screen 13 prevents external bacteria from entering the sealed box 7, and the plurality of ultraviolet lamps 10 are turned on to sterilize the inside of the sealed box 7. The mirror film 9 is anti-corrosive and refracts ultraviolet rays to improve the sterilization effect of ultraviolet rays, and the control valve 8 is opened to discharge the liquid inside the sampling tube 22 into the discarded flow test tube. The inside of the tube 15 is discarded to prevent the residual liquid in the sampling tube 22 from affecting the sampling effect, and then the control valve 8 is closed to prevent the accumulated liquid in the sampling tube 22 from affecting the sampling effect, the electric push rod 33 extends to drive the L-shaped plate 23 to move downward, the L-shaped plate 23 drives the connecting plate 21 to move downward, the connecting plate 21 drives the connecting column 31 to move downward, the connecting column 31 drives the sealing plug 30 to move downward, the sealing plug 30 drives the baffle 37 to move downward, the baffle 37 squeezes the sampling test tube 29, the sampling test tube 29 squeezes the placement tube 19, the placement tube 19 drives the rotating plate 24 to descend, and the rotating plate 24 drives the round rod 1 6 descends, the round rod 16 drives the L-shaped connecting rod 28 to descend, the L-shaped connecting rod 28 drives the sliding sleeve rod 35 to slide inside the straight groove 34, when the sliding sleeve rod 35 slides into the spiral groove 26, the second spring drives the sliding sleeve rod 35 to extend, so that the end of the sliding sleeve rod 35 abuts against the inside of the spiral groove 26, and at the same time, the L-shaped connecting rod 28 compresses the first spring 27 downward, when the electric push rod 33 contracts and drives the L-shaped plate 23 to move upward, the L-shaped plate 23 drives the connecting plate 21 to move upward, the connecting plate 21 drives the connecting column 31 to move upward, the connecting column 31 drives the sealing plug 30 to move upward, and the sealing plug 30 drives the baffle 37 moves upward to release the squeezing of the sampling tube 29, the first spring 27 rebounds to drive the L-shaped connecting rod 28 to rise, the L-shaped connecting rod 28 drives the sliding sleeve rod 35 to slide inside the spiral groove 26, thereby driving the rotating cylinder 25 to rotate, the rotating cylinder 25 drives the rotating disk 18 to rotate, the rotating disk 18 drives the two sleeve rods 17 to rotate, thereby switching the positions of the discarded flow tube 15 and the sampling tube 29, the discarded flow tube 15 squeezes the baffle 37, so that the baffle 37 is separated from the sealing plug 30, and the control valve 8 is opened again to discharge the liquid inside the sampling tube 22 into the sampling tube 29 for sampling, and then the control valve 8 is closed;

[0044] The electric push rod 33 extends to drive the L-shaped plate 23 to move downward, the L-shaped plate 23 drives the connecting plate 21 to move downward, the connecting plate 21 drives the connecting column 31 to move downward, the connecting column 31 drives the sealing plug 30 to move downward, the sealing plug 30 drives the discarded flow test tube 15 to be squeezed, the discarded flow test tube 15 squeezes the placement tube 19, the placement tube 19 drives the rotating plate 24 to descend, the rotating plate 24 drives the round rod 16 to descend, the round rod 16 drives the L-shaped connecting rod 28 to descend, the L-shaped connecting rod 28 drives the sliding sleeve rod 35 to slide inside the straight groove 34, and when the sliding sleeve rod 35 slides to the inside of the spiral groove 26, the second spring drives the sliding sleeve rod 35 to extend , so that the end of the sliding sleeve rod 35 is against the inside of the spiral groove 26. At the same time, the L-shaped connecting rod 28 compresses the first spring 27 downward. When the electric push rod 33 contracts, it drives the L-shaped plate 23 to move upward, the L-shaped plate 23 drives the connecting plate 21 to move upward, the connecting plate 21 drives the connecting column 31 to move upward, the connecting column 31 drives the sealing plug 30 to move upward, the sealing plug 30 drives the baffle 37 to move upward, and the squeezing of the sampling test tube 29 is released. The first spring 27 rebounds and drives the L-shaped connecting rod 28 to rise. The L-shaped connecting rod 28 drives the sliding sleeve rod 35 to slide inside the spiral groove 26, thereby driving the rotating cylinder 25 to rotate, and the rotating cylinder 25 drives the rotating disk 18 to rotate, and the rotating disk 18 drives the two sleeve rods 17 to rotate, thereby switching the positions of the discard test tube 15 and the sampling test tube 29. After that, the electric push rod 33 extends and drives the L-shaped plate 23 to move downward, the L-shaped plate 23 drives the connecting plate 21 to move downward, the connecting plate 21 drives the connecting column 31 to move downward, the connecting column 31 drives the sealing plug 30 to move downward, and the sealing plug 30 is inserted into the interior of the sampling test tube 29 to increase the friction between the sealing plug 30 and the sampling test tube 29. When the electric push rod 33 contracts and drives the L-shaped plate 23 to move upward, the L-shaped plate 23 drives the connecting plate 21 to move upward, and the connecting plate 21 The connecting column 31 is driven to move upward, and the connecting column 31 is pulled out from the sealing plug 30. The sealing plug 30 seals the sampling tube 29. The control panel 4 is opened to control the start of the air intake pump 6, and air is injected into the inside of the sealing box 7 to balance the pressure difference between the inside and the outside. The increased air pressure makes the sealing plug 30 and the sampling tube 29 more tightly closed to prevent bacteria in the external air from contaminating the sampling liquid in the sampling tube 29. The filter box 20 filters the bacteria in the air to prevent external bacteria from entering the sealing box 7. Then, the sealing door 3 is opened, and the discard tube 15, the sampling tube 29 and the baffle 37 are taken out to complete the sterile sampling.

[0045] The above describes in detail the preferred implementation of this patent, but this patent is not limited to the above implementation. Various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of this patent.

Claims

1. A sterile sampling device for a liquid pipeline, comprising a fixing assembly, characterized in that: The fixing assembly comprises a fixing ring (2), the fixing ring (2) is fixed on the conveying pipe (1), a sealing box (7) is fixed on the side of the fixing ring (2), a sampling tube (22) is fixed on the sealing box (7), one end of the sampling tube (22) penetrates and extends into the interior of the conveying pipe (1), a control valve (8) is fixed on the sampling tube (22), a mounting plate (32) is fixed on the other end of the sampling tube (22), the mounting plate (32) is fixed inside the sealing box (7), a drainage joint (14) is fixed below the mounting plate (32), the drainage joint (14) is connected to the sampling tube (22), a plurality of ultraviolet lamps (10) are fixed inside the sealing box (7), a mirror film (9) is arranged on the inner wall of the sealing box (7), a sealing door (3) is hinged on the side of the sealing box (7), a handle (12) and a control panel (4) are arranged on the sealing door (3), and a pressing assembly and a conversion assembly are arranged inside the sealing box (7); The pressing assembly comprises an electric push rod (33) and a sealing plug (30), the electric push rod (33) is fixed inside the sealing box (7), an L-shaped plate (23) is fixed at the end of the electric push rod (33), a connecting plate (21) is fixed at the end of the L-shaped plate (23), a connecting column (31) is fixed below the connecting plate (21), the sealing plug (30) is detachably sleeved on the connecting column (31), a suction cup groove is provided below the sealing plug (30), and a baffle (37) is adsorbed below the sealing plug (30); The conversion assembly comprises a fixed cylinder (11), the fixed cylinder (11) is fixed inside the sealing box (7), a rotating disk (18) is rotatably arranged above the fixed cylinder (11), a rotating cylinder (25) and two sleeve rods (17) are fixed below the rotating disk (18), the rotating cylinder (25) is located between the two sleeve rods (17), two spiral grooves (26) and two straight grooves (34) are provided above the rotating cylinder (25), the two ends of the two spiral grooves (26) are respectively connected to the upper end and the lower end of the two straight grooves (34), the lower end depth of the spiral groove (26) is lower than that of the straight groove (34), and the upper end depth of the spiral groove (26) is the same as that of the straight groove (34), the ends of the two sleeve rods (17) are located above the rotating disk (18), the ends of the two sleeve rods (17) are both fixed with a placement cylinder (19), and a rotating plate (24) is fixed between the two placement cylinders (19).

2. A sterile sampling device for liquid pipeline according to claim 1, characterized in that: A vacuum pump (5) and an air intake pump (6) are fixed above the sealing box (7); the air intake end of the vacuum pump (5) is connected to the sealing box (7); a filter screen (13) is fixed to the air outlet end of the vacuum pump (5); the air outlet end of the air intake pump (6) is connected to the sealing box (7); a filter box (20) is fixed to the air outlet end of the air intake pump (6); and the filter box (20) is located inside the sealing box (7).

3. A sterile sampling device for liquid pipeline according to claim 1, characterized in that: The rotating disk (18) and the rotating cylinder (25) are both provided with a connecting hole, a round rod (16) is rotatably arranged inside the connecting hole, the upper end of the round rod (16) is rotatably arranged on the rotating plate (24), an L-shaped connecting rod (28) is fixed to the lower end of the round rod (16), a first spring (27) is fixed below the L-shaped connecting rod (28), the first spring (27) is fixed to the bottom of the fixed cylinder (11), a sliding sleeve rod (35) is fixed to the L-shaped connecting rod (28), a second spring is arranged inside the sliding sleeve rod (35), and the end of the sliding sleeve rod (35) is slidably arranged inside the spiral groove (26) and the straight groove (34).

4. A sterile sampling device for liquid pipeline according to claim 3, characterized in that: A discard test tube (15) and a sampling test tube (29) are respectively placed inside the two placement tubes (19); the discard test tube (15) is longer than the sampling test tube (29); a circular ring plate (36) is fixed inside the discard test tube (15), and the end of the discard test tube (15) is flush with the baffle (37).

5. A sterile sampling device for liquid pipeline according to claim 2, characterized in that: The control panel (4) is electrically connected to the vacuum pump (5), the air intake pump (6), the control valve (8), the ultraviolet lamp (10) and the electric push rod (33).

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