A portable water quality microbial sampling device

Abstract

The present application relates to the field of water quality sampling, and specifically discloses a portable water quality microorganism sampling device, which includes: a liquid collection tube; a piston device, which is used to form an abutment with a through opening and an elastic sealing film arranged at the through opening for blocking the through opening; the elastic sealing film has a first state of convex deformation toward the liquid collection inlet and a second state of convex deformation away from the liquid collection inlet; a protective device, which is used to form a sealing member that closes the liquid collection inlet, and a gas injection channel connected to the liquid collection inlet; a control device, which is used to directly or indirectly inject or extract protective gas into or from the liquid collection chamber to make the piston device close to or away from the liquid collection inlet. The present application has the effect of being able to simultaneously inject protective gas into both sides of the piston device, so that the protective gas is in contact with the inner wall surface of the liquid collection tube without dead angles, and the protective gas can inhibit the growth of bacteria, thereby avoiding the problem of contamination of the sampled sample.

Description

Technical Field

[0001] The present application relates to the field of water quality sampling, and in particular to a portable water quality microbial sampling device. Background Art

[0002] At present, water quality microbial sampling mainly involves sampling water and then testing the types and quantities of microorganisms in the water. The main method for sampling water is to suck water into a container and discharge the water in the container to the corresponding testing equipment for testing.

[0003] In the related art, the Chinese patent with application number 202222790527.1 proposes a mobile extraction unit to sample water. In other technical fields, it is also mentioned that a piston is moved in a tube body for sampling. There is a water inlet on the tube body, and a corresponding cleaning structure is set on the piston to clean the inner wall of the tube body to prevent water from adhering to the inner wall of the tube body and avoid the situation that easily leads to the breeding of bacteria.

[0004] With respect to the above-mentioned related technologies, the inventor believes that there are the following defects:

[0005] The corresponding cleaning structure on the piston cannot completely clean every position of the tube body, so there are easy to be cleaning dead corners. For example, the area between the piston and the water inlet cannot be completely cleaned by the cleaning structure on the piston, so it is not possible to prevent the growth of bacteria, which will cause the sample to be contaminated. Summary of the invention

[0006] In order to improve the problem that bacteria cannot be completely prevented from growing due to the existence of cleaning dead corners, resulting in contamination of the sampled samples, the present application provides a portable water quality microorganism sampling device.

[0007] The portable water quality microbial sampling device provided in this application adopts the following technical solution:

[0008] A portable water quality microorganism sampling device comprises: a liquid collection tube for forming a liquid collection inlet and a liquid collection chamber connected to the liquid collection inlet; a piston device for forming an abutment with a through opening and an elastic sealing membrane arranged at the through opening for blocking the through opening; the elastic sealing membrane has a first state of convex deformation toward the liquid collection inlet and a second state of convex deformation away from the liquid collection inlet; a protective device for forming a sealing member for sealing the liquid collection inlet and an injection channel connected to the liquid collection inlet; a control device for directly or indirectly injecting or extracting protective gas into or from the liquid collection chamber to make the piston device approach or move away from the liquid collection inlet and\or directly or indirectly injecting or extracting protective gas into or from the injection channel to make the piston device approach or move away from the liquid collection inlet; wherein the sealing member is detachably connected to the liquid collection tube; when the piston device moves close to the liquid collection inlet, the elastic sealing membrane is in the first state, and when the piston device moves away from the liquid collection inlet, the elastic sealing membrane is in the second state.

[0009] By adopting the above technical solution: by injecting protective gas into the liquid collection chamber, the air pressure on both sides of the piston device is changed to drive the piston device to move, and the moving speed and moving distance of the piston device can be controlled more accurately. By injecting protective gas, when the liquid collection tube is not in use, the protective gas is injected to move the piston device to the position closest to the liquid collection inlet, and then the other parts of the liquid collection chamber can be filled with protective gas. The protective gas has an antibacterial and bactericidal effect, which is mainly used to inhibit the growth of microorganisms. Then, when the liquid collection tube is not in use, it can be preserved by itself to avoid some microorganisms surviving on the inner wall of the liquid collection tube, which causes the microorganisms inside the liquid collection tube to affect the overall detection quality when it is used again, thereby better improving the accuracy of sampled water detection.

[0010] By adopting the above-mentioned technical solution, the liquid inlet can be blocked by setting the protective device, and the control device also injects protective gas into the gas injection cavity, and the protective gas is transferred to the chamber composed of the piston device and the liquid inlet, so that the entire liquid chamber is filled with protective gas, and the liquid chamber can be more comprehensively protected without dead angles. Bacteria inhibition by protective gas, thereby better ensuring the environment inside the liquid collection tube, and improving the detection accuracy of sampled water. In addition, by controlling the pressure on both sides of the piston device, the piston device can be moved in the liquid collection chamber filled with protective gas, and the inner wall surface of the liquid collection tube originally covered by the piston device can also be brought into contact with the protective gas, so that the entire liquid collection chamber of the liquid collection tube can be better filled with protective gas and bacteria can be inhibited.

[0011] By adopting the above-mentioned technical scheme, when the piston device moves close to the liquid inlet, the elastic sealing membrane is in the first state, and when the piston device moves away from the liquid inlet, the elastic sealing membrane is in the second state. When the piston device is away from the liquid inlet, that is, when water is sampled into the liquid taking chamber through the liquid taking port, the elastic sealing membrane is in the second state, and the elastic sealing membrane is raised away from the liquid taking inlet. Then, when water is taken, the chamber between the piston device and the liquid taking inlet can be increased to avoid direct contact between water and the elastic sealing membrane when taking liquid. Therefore, when in use, as long as the liquid taking tube is kept vertical or tilted downward slightly, it can be ensured that the sampled water will not come into contact with the elastic sealing membrane, thereby reducing the possibility of water contacting the piston device, thereby protecting the piston device. In addition, the position of the piston device can also be set so that the size of the chamber between the liquid collection inlet and the piston device matches the size of the spatial change caused by the elastic sealing membrane changing from the first state to the second state. Then, in actual use, the elastic sealing membrane of the piston device can be first placed in the first state, and then the liquid collection inlet is immersed in the water to be sampled. Then, the control device extracts the protective gas from the liquid collection chamber, and the elastic sealing membrane changes from the first state to the second state. Then, the chamber between the elastic sealing membrane and the liquid collection inlet is filled with water. Subsequently, the piston device moves away from the liquid collection inlet, ensuring that the water in the liquid collection tube completely fills the chamber between the piston device and the liquid collection inlet. Therefore, when the liquid collection tube is moved or transferred, since the water collected in the liquid collection tube fills the liquid collection tube, the water in the liquid collection tube will not flow significantly, thereby not generating bubbles, thereby more realistically restoring the state of the sampled water in the sample. If the above solution is not adopted, it will be difficult for the water to completely fill the entire liquid collection tube. When the liquid collection tube is moved or transferred, the water in the liquid collection tube is not filled, so the water is easy to flow, and it is easy to cause bubbles in the water in the liquid collection tube, and the water in the liquid collection tube cannot restore the state of the sampled water in the sample, resulting in deviations in the test results. Therefore, the present application can improve the accuracy of the test results by more effectively restoring the state of the sampled water in the sample.

[0012] Optionally, the sampling equipment also includes: a holding device, a protective gas storage device, a connecting pipeline and a connecting piece; the protective gas storage device is used to form a storage chamber, and the protective gas storage device is connected to the holding device; the connecting pipeline is used to connect the storage chamber with the liquid collection chamber; the connecting piece is used to make the liquid collection tube and the holding device directly or indirectly detachably connected; when the connecting piece connects the liquid collection tube and the holding device, the holding device and the liquid collection tube form a straight rod structure; the connecting pipeline is a flexible hose.

[0013] By adopting the above-mentioned technical solution and setting up a protective gas storage device, the protective gas can be stored, which solves the problem of the source of the protective gas and can better realize the technical solution of the present application. In addition, the connection between the liquid collection tube and the holding device through the connecting pipeline can also realize that the liquid collection tube can be moved to a variety of positions relative to the holding device, which is more convenient to use. For example, in some occasions, it is necessary to sample water in the cracks of the rocks, but there are multiple bends in the cracks. At this time, the liquid collection tube can be put in, and the connecting pipeline is bent, so that sampling can be used in special scenes. In addition, the liquid collection tube and the holding device can form a straight rod structure, which can more stably determine the sampling position when sampling. At the same time, when the liquid collection tube is set to a special length, the sampling height can be increased, thereby greatly improving the convenience of sampling.

[0014] Optionally, the sampling device also includes: a limiting device; the limiting device is used to form a first limiting member on the liquid collection tube and a second limiting member detachably connected to the first limiting member; the second limiting member can directly or indirectly fix the liquid collection tube to the holding device, so that the liquid collection tube and the holding device form a folding structure that is easy to carry and has a slot located between the holding device and the liquid collection tube.

[0015] By adopting the above technical solution, the limiting tube can be bent 180° relative to the holding device, and the liquid collection tube and the holding device can be fixed, thereby realizing the folding of the liquid collection tube and the holding device, and improving portability. In addition, when the liquid collection tube and the holding device form a folded structure, there is a slot between the two, and a rope can be passed through the slot, making it more convenient to carry, and it can also pass through multiple sampling devices at the same time, making it convenient to carry multiple sampling devices at the same time.

[0016] Optionally, the protective device also includes: a vacuum member; the vacuum member is used to extract the air in the liquid extraction chamber between the liquid extraction inlet and the piston device; the control device is used to add the protective gas into the liquid extraction chamber between the liquid extraction inlet and the piston device after the air in the liquid extraction chamber between the liquid extraction inlet and the piston device is extracted.

[0017] By adopting the above technical solution, the air extraction member evacuates the air in the liquid collection chamber between the liquid collection inlet and the piston device. Since the elastic sealing film can have the settings of the first state and the second state, the elastic sealing film can be in the first state when evacuating air, thereby reducing the size of the liquid collection chamber between the liquid collection inlet and the piston device, so that the air that can be accommodated in the chamber is greatly reduced, so that the air extraction member can more easily evacuate the air in the liquid collection chamber between the liquid collection inlet and the piston device, and then the control device injects the protective gas into the liquid collection chamber between the liquid collection inlet and the piston device, so that all the gas in the chamber is protective gas, which better ensures the protective gas's effect of inhibiting the growth of microorganisms in the chamber. In addition, first evacuating the air in the liquid collection chamber between the liquid collection inlet and the piston device can also better ensure the purity of the protective gas and avoid mixing other gases into the protective gas, so that in daily use, all the protective gas stored in the protective gas storage device is protective gas, which greatly improves the service life and stability of use.

[0018] Optionally, the protective device further comprises: a connecting hose for connecting the gas injection channel with the storage chamber; the connecting hose is also used to enable the protective device to form a movably connected relationship with the holding device.

[0019] By adopting the above technical solution and the design of the connecting hose, after the sealing member is disassembled relative to the liquid extraction tube, the sealing member can be connected with the storage chamber through the connecting hose, thereby avoiding loss of the sealing member.

[0020] Optionally, the sampling device further comprises a coupling member, and the coupling member is used to detachably connect the sealing member and the holding device so as to be fixed together directly or indirectly.

[0021] By adopting the above technical solution, the combination piece enables the closure piece to be detachably connected to the holding device. Then, when the closure piece does not need to block the liquid inlet, the closure piece can be installed on the holding device, which is convenient for carrying the closure piece.

[0022] Optionally, the protective gas storage device includes a first storage box, a second storage box and a connecting storage box; the first storage box is arranged at one end of the holding device, and the second storage box is arranged at the other end of the holding device; the connecting storage box is used to connect the first storage box with the second storage box; the first storage box is connected to the connecting pipeline; the second storage box is connected to the connecting hose; the holding device and the connecting storage box form a holding structure that is easy to hold.

[0023] By adopting the above-mentioned technical solution, the provision of multiple storage boxes greatly increases the storage capacity of the protective gas, and the first storage box and the second storage box are provided at both ends of the holding device, which will not affect the gripping feel. The holding device and the connected storage boxes form a holding structure that is easy to hold and can increase the ease of holding, that is, it increases the storage capacity of the protective gas and ensures the gripping feel.

[0024] Optionally, the piston device also includes: a first contact piece and a second contact piece; a plurality of hollow grooves are formed on the first contact piece and the second contact piece; the first contact piece and the second contact piece are both fixed to the abutment piece; the first contact piece is located at one end of the abutment piece, and the second contact piece is located at the other end of the abutment piece; when the elastic sealing membrane is in the first state, the elastic sealing membrane is in contact with the first contact piece; when the elastic sealing membrane is in the second state, the elastic sealing membrane is in contact with the second contact piece; the elastic sealing membrane is located between the first contact piece and the second contact piece.

[0025] By adopting the above-mentioned technical solution, the design of the first contact piece and the second contact piece is mainly to limit the elastic sealing film to prevent the elastic sealing film from being deformed too much and becoming fatigued, thereby better maintaining the elasticity of the elastic sealing film for a long time and better increasing the service life of the elastic sealing film.

[0026] Optionally, the protective gas is nitrogen.

[0027] Optionally, when the liquid collection tube and the holding device form a foldable structure that is easy to carry, the liquid collection inlet contacts a liquid surface, and the holding device, the protective gas storage device and the protection device are all located above the liquid surface.

[0028] By adopting the above technical solution, when the liquid collection tube and the holding device form a foldable structure that is easy to carry, the sampling operation can also be carried out normally, and other parts do not need to be immersed below the liquid surface, which better ensures safety during use.

[0029] In summary, the present application includes at least one of the following beneficial technical effects:

[0030] 1. Through the control device and the sealing member, the protective gas can be injected into both sides of the piston device at the same time, so that the protective gas is in contact with the inner wall surface of the liquid collection tube without dead angles. The protective gas can inhibit the growth of bacteria, thereby avoiding the problem of contamination of the sampled sample;

[0031] 2. By injecting protective gas into the liquid collection tube, the pressure above the piston device is controlled, so that the piston device moves in the liquid collection tube. By controlling the pressure, the moving distance of the liquid collection tube can be accurately controlled to increase the accuracy of sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is an overall schematic diagram of one of the use states of the embodiment of the present application, mainly showing the use state of the straight rod structure;

[0033] Figure 2 It is a structural schematic diagram of a part of the embodiment, mainly showing the structure of the holding device and the protective gas storage device;

[0034] Figure 3 It is a structural schematic diagram of a part of the embodiment, mainly showing the structure of the closing member and the second storage box;

[0035] Figure 4 It is a structural schematic diagram of a part of the embodiment, mainly showing the structure inside the first cover;

[0036] Figure 5 It is a structural schematic diagram of a part of the embodiment, mainly showing the structure of the second cover;

[0037] Figure 6 It is an overall schematic diagram of another use state of the embodiment of the present application, mainly showing a use state of the folding structure;

[0038] Figure 7 It is a structural schematic diagram of a part of the embodiment, mainly showing the Figure 6 structure;

[0039] Figure 8 It is a structural schematic diagram of a part of the embodiment, mainly showing the structure of the first limiter, the second limiter and some surrounding parts;

[0040] Fig. 9 It is a structural schematic diagram of a part of the embodiment, mainly showing the structure of the piston device;

[0041] Fig.10 is an overall schematic diagram of other use states of the embodiment of the present application, mainly showing another use state of the folding structure;

[0042] Fig.11 It is a structural diagram of a part of the embodiment, mainly showing Figure 1 The cross-sectional structure of

[0043] Fig.12 yes Fig.11 A magnified view of part A;

[0044] Fig.13 yes Fig.11 A magnified view of part B

[0045] Fig.14 It is a structural diagram of a part of the embodiment, mainly showing Figure 6 The cross-sectional structure of

[0046] Fig.15 yes Fig.14 Enlarged view of part C.

[0047] Reference numerals:

[0048] 1. Liquid collection tube; 11. Liquid collection inlet; 12. Liquid collection chamber; 13. Slot; 14. Liquid collection sleeve;

[0049] 2. Piston device; 21. Port; 22. Abutment member; 23. Elastic sealing film; 24. First contact member; 25. Second contact member;

[0050] 3. Protective device; 31. Closing member; 311. First cover; 312. Second cover; 313. First enclosure; 314. Second enclosure; 315. First tube body; 316. Second tube body; 317. Third tube body; 318. Fourth tube body; 319. Control valve; 32. Gas injection channel;

[0051] 4. Control device; 41. First control pump; 42. Second control valve;

[0052] 5. Holding device; 6. Protective gas storage device; 61. First storage box; 62. Second storage box; 63. Connecting storage box; 64. Connecting pipeline;

[0053] 7. Connecting piece; 71. Threaded block; 72. Threaded tube; 73. First stopper; 74. Second stopper; 75. Connecting hose; 76. Accommodating chamber;

[0054] 8. Vacuum parts. DETAILED DESCRIPTION

[0055] The following is combined with Figure 1-15 This application is described in further detail.

[0056] Example 1

[0057] A portable water quality microorganism sampling device comprises: a liquid collection tube 1, a piston device 2, a protection device 3 and a control device 4.

[0058] The liquid collection tube 1 is used to form a liquid collection inlet 11 and a liquid collection chamber 12 connected to the liquid collection inlet 11. The piston device 2 is used to form an abutment 22 with a through opening 21 and an elastic sealing membrane 23 arranged at the through opening 21 for blocking the through opening 21. Among them, the abutment 22 is a frame structure abutting against the inner wall surface of the liquid collection chamber 12, and a rubber pad is arranged on the edge of the abutment 22. The abutment 22 is tightly pressed against the inner wall surface of the liquid collection chamber 12 through the rubber pad and sealed. An elastic sealing membrane 23 is arranged at the through opening 21 opened in the middle of the abutment 22. The elastic sealing membrane 23 is a membrane body made of rubber material, and the elastic sealing membrane 23 closes the through opening 21. By injecting protective gas, when the liquid collection tube 1 is not in use, the protective gas is injected to move the piston device 2 to the position closest to the liquid collection inlet 11, and then the other parts of the liquid collection chamber 12 can be filled with the protective gas. The protective gas has an antibacterial and bactericidal effect, and is mainly used to inhibit the growth of microorganisms. Then, when the liquid collection tube 1 is not in use, it can be preserved by itself, avoiding the situation where some microorganisms survive on the inner wall of the liquid collection tube 1, resulting in the microorganisms inside the liquid collection tube 1 affecting the overall detection quality when it is used again, thereby better improving the accuracy of sampled water detection.

[0059] The protective device 3 is used to form a closure member 31 that closes the liquid inlet 11, and a gas injection channel 32 that is connected to the liquid inlet 11. The closure member 31 is a cover body, and the closure member 31 is connected to the liquid collection tube 1 so that the closure member 31 closes the liquid collection inlet 11. The gas injection channel 32 is a cavity opened on the closure member 31. Through the setting of the protective device 3, the liquid collection inlet 11 can be blocked, and the control device 4 also injects protective gas into the gas injection cavity, and the protective gas is transferred to the chamber formed by the piston device 2 and the liquid collection inlet 11, so that the entire liquid collection chamber 12 is filled with protective gas, and the protective gas can be used to inhibit bacteria in the liquid collection chamber 12 more comprehensively without dead angles, thereby better ensuring the environment inside the liquid collection tube 1 and improving the detection accuracy of the sampled water. In addition, by controlling the pressure on both sides of the piston device 2, the piston device 2 can be moved in the liquid collection chamber 12 filled with protective gas, so that the inner wall surface of the liquid collection tube 1 originally covered by the piston device 2 can also be in contact with the protective gas, thereby better filling the protective gas in the entire liquid collection chamber 12 of the liquid collection tube 1 and performing antibacterial treatment.

[0060] The control device 4 is used to directly or indirectly inject or extract protective gas into the liquid collection chamber 12 so that the piston device 2 is close to or away from the liquid collection inlet 11 and / or directly or indirectly inject or extract protective gas into the gas injection channel 32 so that the piston device 2 is close to or away from the liquid collection inlet 11. Among them, the control device 4 can simultaneously inject protective gas into the liquid collection chambers 12 on both sides of the piston device 2 or select one of them to inject protective gas. In this embodiment, the control device 4 adopts an air pump. The protective gas is preferably nitrogen. When the control device 4 injects protective gas into the liquid collection chamber 12, the air pressure on both sides of the piston device 2 can be different, and then the piston device 2 is moved in the liquid collection chamber 12 under pressure, thereby realizing the use of the movement of the piston to take in or discharge water from the liquid collection inlet 11. When the elastic sealing membrane 23 is subjected to a driving external force, it has a first state of convex deformation toward the liquid collection inlet 11 and a second state of convex deformation away from the liquid collection inlet 11. Among them, the sealing member 31 is detachably connected to the liquid collection tube 1. When the piston device 2 moves close to the liquid inlet 11 , the elastic sealing membrane 23 is in the first state, and when the piston device 2 moves away from the liquid inlet 11 , the elastic sealing membrane 23 is in the second state.

[0061] When the piston device 2 moves close to the liquid inlet 11, the elastic sealing membrane 23 is in a first state, and when the piston device 2 moves away from the liquid inlet 11, the elastic sealing membrane 23 is in a second state. When the piston device 2 is away from the liquid inlet 11, that is, when water is sampled into the liquid chamber 12 through the liquid port, the elastic sealing membrane 23 is in the second state, and the elastic sealing membrane 23 bulges away from the liquid inlet 11. Then, when water is taken, the chamber between the piston device 2 and the liquid inlet 11 can be increased to avoid direct contact between water and the elastic sealing membrane 23 when liquid is taken. Therefore, when in use, as long as the liquid taking tube 1 is kept vertical or tilted downward slightly, it can be ensured that the sampled water will not come into contact with the elastic sealing membrane 23, thereby reducing the possibility of water coming into contact with the piston device 2, thereby protecting the piston device 2. In addition, the position of the piston device 2 can also be set so that the size of the chamber between the liquid inlet 11 and the piston device 2 matches the size of the spatial change caused by the elastic sealing membrane 23 changing from the first state to the second state. Then, in actual use, the elastic sealing membrane 23 of the piston device 2 can be first placed in the first state, and then the liquid inlet 11 is immersed in the water to be sampled. Then the control device 4 extracts the protective gas from the liquid chamber 12, and the elastic sealing membrane 23 changes from the first state to the second state. Then, the chamber between the elastic sealing membrane 23 and the liquid inlet 11 is filled with water. Subsequently, the piston device 2 moves away from the liquid inlet 11, ensuring that the water in the liquid collection tube 1 completely fills the chamber between the piston device 2 and the liquid collection inlet 11. Therefore, when the liquid collection tube 1 is moved or transferred, since the water collected in the liquid collection tube 1 fills the liquid collection tube 1, the water in the liquid collection tube 1 will not flow significantly, thereby not generating bubbles, and thus the state of the sampled water in the sample can be more realistically restored. If the above solution is not adopted, it will be difficult for the water to completely fill the entire liquid collection tube 1. When the liquid collection tube 1 is moved or transferred, the water in the liquid collection tube 1 is not filled, so the water is easy to flow, and it is easy to cause bubbles in the water in the liquid collection tube 1, and the water in the liquid collection tube 1 cannot restore the state of the sampled water in the sample, resulting in deviations in the test results. Therefore, the present application can improve the accuracy of the test results by more effectively restoring the state of the sampled water in the sample.

[0062] Example 2

[0063] The difference from Example 1 is that

[0064] The sampling device also includes: a holding device 5, a protective gas storage device 6, a connecting pipe 64 and a connecting piece 7. The protective gas storage device 6 is used to form a storage chamber, and the protective gas storage device 6 is connected to the holding device 5. Specifically, the protective gas storage device 6 is a box body, and the holding device 5 is a block that is easy to hold. The protective gas storage device 6 and the holding device 5 are fixedly connected together. A control circuit is integrated on the holding device 5, and a button for operating the control device 4 is also provided on the holding device 5. By holding the holding device 5 by hand, the interface realizes the operation of taking and discharging liquid. The connecting pipe 64 is used to connect the storage chamber with the liquid collection chamber 12, wherein one end of the connecting pipe 64 is connected to the protective gas storage device 6 and the other end is connected to the liquid collection tube 1. The connecting pipe 64 is a flexible hose, so that the liquid collection tube 1 and the holding device 5 form a movable connection.

[0065] Among them, the connecting member 7 is used to make the liquid collection tube 1 and the holding device 5 directly or indirectly detachably connected. When the connecting member 7 connects the liquid collection tube 1 and the holding device 5, the holding device 5 and the liquid collection tube 1 form a straight rod structure. The connection between the liquid collection tube 1 and the holding device 5 through the connecting pipe 64 can also realize that the liquid collection tube 1 can be moved to a variety of positions relative to the holding device 5, which is more convenient to use. For example, in some occasions, it is necessary to sample water in the cracks of the rocks, but there are multiple bends in the cracks. At this time, the liquid collection tube 1 can be put in, and the connecting pipe 64 is bent, so that sampling can be used in special scenes. In addition, the liquid collection tube 1 and the holding device 5 can form a straight rod structure, which can more stably determine the sampling position during sampling. At the same time, when the liquid collection tube 1 is set to a special length, the sampling height can be increased, thereby greatly improving the convenience of sampling.

[0066] Among them, one of the solutions for the connecting member 7 is: a protrusion is set on the holding device 5, and a ring is set on the liquid collection tube 1, the ring on the liquid collection tube 1 is aligned with the protrusion, and then the protrusion is inserted into the ring, and the protrusion and the ring are tightly fitted, thereby realizing a detachable connection between the liquid collection tube 1 and the holding device 5.

[0067] Another solution for the connector 7 is: a threaded block 71 is provided on the holding device 5, a threaded tube 72 is provided on the liquid extraction tube 1, and the threaded block 71 is aligned with the threaded tube 72 and inserted and rotated and screwed in, so as to realize the detachable fixation of the holding device 5 and the liquid extraction tube 1. Among them, the connecting pipeline 64 is connected to the protective gas storage device 6 through a rotating joint, so that the connecting pipeline 64 can rotate relative to the protective gas storage device 6, avoiding the problem of deformation of the connecting pipeline 64 due to rotation when the threads are connected together. Better detachable connection is realized.

[0068] Example 3

[0069] The difference from Example 1 is that the sampling device also includes: a limiting device; the limiting device is used to form a first limiting member 73 on the liquid collection tube 1 and a second limiting member 74 detachably connected to the first limiting member 73. The second limiting member 74 can directly or indirectly fix the liquid collection tube 1 and the holding device 5, so that the liquid collection tube 1 and the holding device 5 form a folding structure that is easy to carry and has a slot 13 located between the holding device 5 and the liquid collection tube 1. The limiting tube can be bent 180° relative to the holding device 5, and then the liquid collection tube 1 and the holding device 5 are fixed, thereby realizing the folding of the liquid collection tube 1 and the holding device 5, and improving portability. In addition, when the liquid collection tube 1 and the holding device 5 form a folding structure, there is a slot 13 between the two, and a rope can be passed through the slot 13, making it more convenient to carry, and it can also pass through multiple sampling devices at the same time, making it convenient to carry multiple sampling devices at the same time. When the liquid collection tube 1 and the holding device 5 form a foldable structure that is easy to carry, the liquid collection inlet 11 contacts a liquid surface, and the holding device 5, the protective gas storage device 6 and the protection device 3 are all located above the liquid surface.

[0070] Among them, the first solution for the first limit member 73 and the second limit member 74 is: the first limit member 73 and the second limit member 74 adopt a snap fastener, and the first limit member 73 and the second limit member 74 are fixed together by the snap fastener, thereby achieving direct fixation of the liquid collection tube 1 and the holding device 5 together.

[0071] Another solution for the first limiting member 73 and the second limiting member 74 is that both the first limiting member 73 and the second limiting member 74 adopt a magnetic structure, and the first limiting member 73 and the second limiting member 74 are directly fixed together by the attraction of opposite poles.

[0072] In other embodiments, based on Embodiment 2, the first limiting member 73 is fixed to the protective gas storage device 6, and the second limiting member 74 is fixed to the ring or threaded tube 72, thereby indirectly fixing the liquid collection tube 1 and the holding device 5 together.

[0073] Specifically, since the connecting pipeline 64 is a hose, the liquid collection tube 1 is bent downward to the bottom of the holding device 5 and fixed to the holding device 5. The bottom of the holding device 5 refers to the direction of the holding device 5 away from the button.

[0074] Example 4

[0075] The difference from Example 1 is that the protective device 3 also includes an exhaust member 8. The exhaust member 8 is an air pump. In this embodiment, the control device 4 is composed of a first control pump 41 and a second control pump, the second control pump is arranged in the protective gas storage device 6, and the first control pump 41 is arranged on the closing member 31. The exhaust member 8 is used to extract the air in the liquid intake chamber 12 between the liquid intake inlet 11 and the piston device 2 outward. The control device 4 is used to add the protective gas into the liquid intake chamber 12 between the liquid intake inlet 11 and the piston device 2 after the air in the liquid intake chamber 12 between the liquid intake inlet 11 and the piston device 2 is extracted. Since the elastic sealing membrane 23 can have a first state and a second state, the elastic sealing membrane 23 can be in the first state when vacuuming, thereby reducing the size of the liquid collection chamber 12 between the liquid collection inlet 11 and the piston device 2, and greatly reducing the amount of air that the chamber can accommodate, so that the vacuum component 8 can more easily drain the air in the liquid collection chamber 12 between the liquid collection inlet 11 and the piston device 2, and then the control device 4 injects protective gas into the liquid collection chamber 12 between the liquid collection inlet 11 and the piston device 2, so that all the gas in the chamber is protective gas, thereby better ensuring the effect of the protective gas in inhibiting the growth of microorganisms in the chamber.

[0076] Specifically, the protection device 3 further includes: a connecting hose 75 for connecting the gas injection channel 32 with the storage chamber; the connecting hose 75 is also used to form a movable connection between the protection device 3 and the holding device 5. The design of the connecting hose 75 allows the closing member 31 to be connected to the storage chamber through the connecting hose 75 after the closing member 31 is disassembled relative to the liquid extraction tube 1, thereby preventing the closing member 31 from being lost.

[0077] Specifically, the sampling device further includes a coupling member, which is used to detachably connect the closure member 31 to the holding device 5 directly or indirectly. The coupling member enables the closure member 31 to be detachably connected to the holding device 5, so when the closure member 31 does not need to block the liquid inlet 11, the closure member 31 can be installed on the holding device 5, which is convenient for carrying the closure member 31.

[0078] Among them, the combining piece and the connecting piece 7 match, the connecting piece 7 is used to connect the liquid taking pipe 1 with the protective gas storage device 6, and the combining piece is used to connect the closing piece 31 with the protective gas storage device 6, and the connection methods are the same, which are the cooperation of the protrusion and the collar or the threaded block 71 and the threaded tube 72. Preferably, the combining piece and the connecting piece 7 are both used in cooperation with the threaded block 71 and the threaded tube 72.

[0079] In this embodiment, two first stoppers 73 and two second stoppers 74 are provided, wherein one first stopper 73 and one second stopper 74 are used to fix the collar or threaded tube 72 on the liquid collection tube 1 and the protective gas storage device 6 together. Another first stopper 73 and another second stopper 74 are used to fix the collar or threaded tube 72 on the closing member 31 and the protective gas storage device 6 together, so that when the liquid collection tube 1 and the holding device 5 form a folded structure and the closing member 31 blocks the liquid collection inlet 11, the two sets of first stoppers 73 and second stoppers 74 are designed so that there are two connection points between the liquid collection tube 1 and the holding device 5, thereby increasing the stability of the connection between the liquid collection tube 1 and the holding device 5 when folded and carried in daily life, and it is difficult to loosen easily, so that it is more convenient to carry.

[0080] Example 5

[0081] The difference from Example 2 is:

[0082] The protective gas storage device 6 includes a first storage box 61, a second storage box 62 and a connecting storage box 63. The first storage box 61 is arranged at one end of the holding device 5, and the second storage box 62 is arranged at the other end of the holding device 5; the connecting storage box 63 is used to connect the first storage box 61 with the second storage box 62; the first storage box 61 is connected to the connecting pipeline 64; the second storage box 62 is connected to the connecting hose 75; the holding device 5 and the connecting storage box 63 form a holding structure that is easy to hold. The setting of multiple storage boxes greatly increases the storage capacity of the protective gas, and the first storage box 61 and the second storage box 62 are arranged at both ends of the holding device 5, so it does not affect the hand feeling of holding, and the holding device 5 and the connecting storage box 63 form a holding structure that is easy to hold, which can increase the degree of easy holding, that is, it increases the storage capacity of the protective gas and ensures the hand feeling of holding. Among them, the threaded block 71 of the connecting member 7 is fixed to the first storage box 61, and the threaded block 71 of the combining member is fixed to the second storage box 62.

[0083] Specifically, when the threaded tube 72 on the liquid extraction tube 1 is threadedly connected to the threaded block 71 on the first storage box 61 , an accommodating cavity 76 is formed between the threaded tube 72 and the threaded block 71 , and the accommodating cavity 76 is used to accommodate the connecting pipeline 64 .

[0084] In other embodiments, the piston device 2 further includes: a first contact member 24 and a second contact member 25. Both the first contact member 24 and the second contact member 25 are frame structures, and a plurality of hollow grooves are formed on the first contact member 24 and the second contact member 25. Both the first contact member 24 and the second contact member 25 are fixed to the abutment member 22; the first contact member 24 is located at one end of the abutment member 22, and the second contact member 25 is located at the other end of the abutment member 22; when the elastic sealing film 23 is in the first state, the elastic sealing film 23 contacts the first contact member 24; when the elastic sealing film 23 is in the second state, the elastic sealing film 23 contacts the second contact member 25; the elastic sealing film 23 is located between the first contact member 24 and the second contact member 25. The design of the first contact member 24 and the second contact member 25 is mainly to limit the elastic sealing film 23, to prevent the elastic sealing film 23 from being fatigued due to excessive deformation, so as to better maintain the elasticity of the elastic sealing film 23 for a long time, and to better increase the service life of the elastic sealing film 23.

[0085] In a specific solution, the closure member 31 includes a first cover 311, a second cover 312, a first enclosing plate 313, a second enclosing plate 314, a first tube body 315, a second tube body 316, a third tube body 317, a fourth tube body 318 and a control valve 319. The first enclosing plate 313 is used to enclose the area where the air extraction member 8 is placed, and the second enclosing plate 314 is used to enclose the area where the first control pump 41 is placed. The first pipe is connected to the inlet of the air extraction member 8, and the second pipe is connected to the outlet of the air extraction member 8. The third pipe is connected to the inlet of the first control pump 41, and the fourth pipe is connected to the outlet of the first control pump 41. The first pipe is connected to the fourth pipe through the control valve 319, and the first pipe and the fourth pipe are both connected to the liquid inlet 11 through the control valve 319. The control valve 319 is used to control one of the first pipe and the fourth pipe to be connected to the liquid inlet 11. Thereby, the operation of first exhausting gas and then injecting protective gas is realized. Among them, the third pipe is connected to the connecting hose 75. The connecting hose 75 is connected to the upper end of the second storage box 62, and the connecting hose 75 is connected to the third pipe through a rotating joint at the middle position of the first cover 311. The second cover 312 is used to set the threaded pipe 72, the first cover 311 is covered on the second cover 312, and the first cover 311 is provided with a first enclosure 313 and a second enclosure 314.

[0086] In some other specific solutions, a liquid collection sleeve 14 is provided at the end of the liquid collection tube 1, the liquid collection sleeve 14 is threadedly connected to the liquid collection tube 1, and a liquid collection inlet 11 is formed on the liquid collection sleeve 14, so that it is convenient to disassemble the liquid collection sleeve 14 and the liquid collection tube 1 and clean the liquid collection inlet 11. Among them, the second cover 312 of the closure member 31 is threadedly connected to the liquid collection sleeve 14 through a threaded tube 72. More specifically, a first stopper 73 can also be provided on the threaded sleeve, so that in some cases, the two ends of the liquid collection tube 1 can be fixed to the first storage box 61 and the second storage box 62 respectively.

[0087] The inlet end of the second control pump disposed in the first storage tank 61 is communicated with the first storage tank 61 , and the outlet end is communicated with the connecting pipeline 64 .

[0088] The implementation principle of a portable water quality microbial sampling device in the embodiment of the present application is:

[0089] The first usage state in the embodiment of the present application is to align the threaded tube 72 on the liquid collection tube 1 with the threaded block 71 on the first storage box 61, and threadedly connect the two to fix the liquid collection tube 1 to the first storage box 61, so that the liquid collection tube 1 and the holding device 5 are in a straight rod structure.

[0090] The second usage state in the embodiment of the present application is to move the liquid collection tube 1 downward and then rotate the liquid collection tube 1 180° relative to the holding device 5, and the liquid collection tube 1 is located below the holding device 5. Then the threaded tube 72 on the liquid collection tube 1 and the first storage box 61 are fixed together by the first limiter 73 and the second limiter 74, so that the liquid collection tube 1 and the holding device 5 are in a folded state. The slot 13 in the folded state at this time is a slot 13 with an opening. To be precise, the slot 13 is a slot with three ports, two of which are on both sides of the holding device 5, and the third port is the gap between the end of the liquid collection tube 1 away from the connecting pipeline 64 and the second storage box 62. In this state, the closure 31 is fixed to the second storage box 62 by a coupling.

[0091] The third use state in the embodiment of the present application is that, based on the second use state, the closure member 31 and the second storage box 62 are disassembled, and the closure member 31 and the liquid extraction tube 1 are fixed together. The folded structure formed at this time is a slot 13 with two ports, and the two ports are the two sides of the holding device 5.

[0092] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A portable water quality microbial sampling device, characterized in that: include: A liquid collection pipe, used to form a liquid collection inlet and a liquid collection chamber connected to the liquid collection inlet; A piston device is used to form an abutment member having a through opening and an elastic sealing membrane arranged at the through opening for blocking the through opening; the elastic sealing membrane has a first state of convex deformation toward the liquid inlet and a second state of convex deformation away from the liquid inlet; A protective device, used to form a sealing member for sealing the liquid inlet, and a gas injection channel connected to the liquid inlet; A control device, used to directly or indirectly inject or extract a protective gas into the liquid extraction chamber to make the piston device close to or away from the liquid extraction inlet and / or directly or indirectly inject or extract a protective gas into the gas injection channel to make the piston device close to or away from the liquid extraction inlet; Wherein, the sealing member is detachably connected to the liquid extraction tube; when the piston device moves close to the liquid extraction inlet, the elastic sealing membrane is in a first state, and when the piston device moves away from the liquid extraction inlet, the elastic sealing membrane is in a second state; The connection between the sealing member and the liquid extraction pipe enables the sealing member to seal the liquid extraction inlet; the gas injection channel is a cavity opened on the sealing member; The sampling device further comprises: a holding device, a protective gas storage device, and a connecting pipeline, wherein the protective gas storage device is connected to the holding device; the connecting pipeline is used to connect the storage chamber with the liquid collection chamber; The control device is composed of a first control pump and a second control pump, the second control pump is arranged in a protective gas storage device, the protective gas storage device is used to form a storage chamber, and the first control pump is arranged on the sealing member; The protective device also includes: an exhaust member; the exhaust member is used to exhaust the air in the liquid intake chamber between the liquid intake inlet and the piston device; the control device is used to add protective gas into the liquid intake chamber between the liquid intake inlet and the piston device after the air in the liquid intake chamber between the liquid intake inlet and the piston device is exhausted.

2. A portable water quality microorganism sampling device according to claim 1, characterized in that: The sampling device further comprises: a connecting piece; The connecting piece is used to directly or indirectly detachably connect the liquid collection tube to the holding device; When the connecting piece connects the liquid extraction tube to the holding device, the holding device and the liquid extraction tube form a straight rod structure; the connecting pipeline is a flexible hose.

3. A portable water quality microorganism sampling device according to claim 2, characterized in that: The sampling device further comprises: a limiting device; the limiting device is used to form a first limiting member on the liquid collection tube and a second limiting member detachably connected to the first limiting member; The second limiting member can directly or indirectly fix the liquid collection tube to the holding device, so that the liquid collection tube and the holding device form a folding structure that is easy to carry and has a slot located between the holding device and the liquid collection tube.

4. A portable water quality microorganism sampling device according to claim 2, characterized in that: The protection device further comprises: a connecting hose for connecting the gas injection channel with the storage chamber; the connecting hose is also used to enable the protection device to form a movably connected relationship with the holding device.

5. A portable water quality microorganism sampling device according to claim 2, characterized in that: The sampling device further comprises a coupling member, which is used for detachably connecting the sealing member and the holding device to be fixed together directly or indirectly.

6. A portable water quality microorganism sampling device according to claim 4, characterized in that: The protective gas storage device comprises a first storage box, a second storage box and a connecting storage box; The first storage box is arranged at one end of the holding device, and the second storage box is arranged at the other end of the holding device; the connecting storage box is used to connect the first storage box with the second storage box; The first storage box is communicated with the connecting pipeline; the second storage box is communicated with the connecting hose; the holding device and the connecting storage box form a holding structure that is easy to hold.

7. A portable water quality microorganism sampling device according to any one of claims 1-4 and 6, characterized in that: The piston device further comprises: a first contact member and a second contact member; a plurality of hollow grooves are formed on the first contact member and the second contact member; The first contact piece and the second contact piece are both fixed to the abutting piece; the first contact piece is located at one end of the abutting piece, and the second contact piece is located at the other end of the abutting piece; When the elastic sealing film is in the first state, the elastic sealing film contacts the first contact member; when the elastic sealing film is in the second state, the elastic sealing film contacts the second contact member; The elastic sealing film is located between the first contact piece and the second contact piece.

8. The portable water quality microorganism sampling device according to claim 1, characterized in that: The protective gas is nitrogen.

9. The portable water quality microorganism sampling device according to claim 3, characterized in that: When the liquid collection tube and the holding device form a foldable structure that is easy to carry, the liquid collection inlet contacts a liquid surface, and the holding device, the protective gas storage device and the protection device are all located above the liquid surface.

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