A harmful substance detection device for microbial degradation

Abstract

The present invention relates to the technical field of microbial degradation detection, and discloses a harmful substance detection device for microbial degradation, including a degradation tank, the outer surface of which is fixedly connected to a plurality of sampling tubes from top to bottom in sequence, and valve parts are arranged inside the plurality of sampling tubes; the outer surface of the degradation tank is fixedly connected to a mounting frame, and a lifting assembly is arranged inside the mounting frame. The harmful substance detection device for microbial degradation can meet the extraction of harmful substances at different levels by moving the sliding frame up and down, and can drive the sampling mechanism to move sideways by starting the electric cylinder, and can then drive the sampling member to connect with the sampling tube, and can extract samples inside the degradation tank through the sampling member and the sampling tube through the negative pressure inside the negative pressure cylinder, which not only meets the extraction of samples at different levels and improves the comprehensiveness of its harmful substance detection, but also reduces the pollution of the sampling mechanism, and has a good sampling detection function.

Description

Technical Field

[0001] The invention relates to the technical field of microbial degradation detection, and in particular to a harmful substance detection device for microbial degradation. Background Art

[0002] A Chinese invention patent with publication number CN112924642B discloses a harmful substance detection device for microbial degradation. By arranging a liftable submersible pump in a microbial degradation tank body to collect sewage samples containing pesticides at different depths inside the tank body, it is convenient for technical personnel in this field to more accurately grasp the sewage conditions at different levels in the tank body, and provide an accurate basis for subsequent degradation. Through the structural design of the sampling tube, multiple water samples of sewage containing pesticides at the same depth can be collected simultaneously, effectively avoiding the influence of residual sewage in the submersible pump or hose on the detection structure, and providing more material basis for subsequent detection.

[0003] In the related art, in order to meet the requirements of different levels of sewage detection, the existing microbial degradation harmful substance detection device uses a wire wheel and a wire harness to adjust the height of the submersible pump, thereby meeting the extraction and detection of sewage at different levels. However, due to the large size of the degradation tank, in order to meet the sampling and detection work at different levels, it is necessary to set hoses of different lengths. The longer the hose, the more difficult the sampling. In addition, the samples from the early sampling are prone to remain in the pipeline and cause pollution, thereby affecting the accuracy of other later sampling. Furthermore, the wire harness, wire wheel, submersible pump and hose are in the degradation tank for a long time, which is prone to damage, affecting their service life. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the present invention provides a harmful substance detection device for microbial degradation. The sliding frame moves up and down to meet the extraction of harmful substances at different levels. The sampling mechanism can be driven to move sideways by starting the electric cylinder, and then the sampling piece can be driven to connect with the sampling tube. The negative pressure inside the negative pressure cylinder can be used to extract samples from the degradation tank through the sampling piece and the sampling tube. This not only meets the extraction of samples at different levels and improves the comprehensiveness of its harmful substance detection, but also reduces the contamination of the sampling mechanism. It has good sampling and detection functions and solves the problem that the existing harmful substance detection devices usually use pipelines and pumps to perform sampling at different heights. Since the degradation tank is large in size, the required pipeline length is large. During the sampling process, the samples sampled in the early stage are easy to remain in the pipeline, which not only causes pipeline pollution but also affects the subsequent sample extraction effect.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a harmful substance detection device for microbial degradation, comprising a degradation tank, wherein the outer surface of the degradation tank is fixedly connected with a plurality of sampling tubes in sequence from top to bottom, and valve parts are arranged inside the plurality of sampling tubes;

[0008] The outer surface of the degradation tank is fixedly connected with a mounting frame, and a lifting assembly is arranged inside the mounting frame, and the lifting assembly includes a sliding frame that can be driven up and down, an electric cylinder fixed inside the sliding frame, and a lifting member used to drive the sliding frame up and down;

[0009] A sampling mechanism is connected to the sliding frame of the lifting assembly, and the sampling mechanism includes a fixed frame, a negative pressure cylinder and a piston end, a storage bottle, and a sampling piece for sampling through a sampling tube. The telescopic end of the electric cylinder is fixedly connected to the fixed frame.

[0010] Preferably, the valve component includes an annular block fixed to the inside of the sampling tube, the interior of the annular block is a conical through hole, and a conical piston is arranged inside the annular block, one side of the annular block is connected to a spring, and one end of the spring is fixedly connected to a sliding plate, the sliding plate is slidably connected to the inside of the sampling tube, and the sliding plate is fixedly connected to the conical piston through a connecting rod.

[0011] Preferably, the negative pressure cylinder is fixed to the top of the fixing frame, the storage bottle is detachably mounted on one side of the fixing frame, and the piston end is inserted into the top port of the storage bottle.

[0012] Preferably, the sampling member includes a negative pressure tube fixedly connected to the top of the piston end, one end of the negative pressure tube is connected to the inside of the negative pressure cylinder, one side of the negative pressure cylinder is fixedly connected to an exhaust pipe, both the negative pressure tube and the exhaust pipe are equipped with a one-way valve, the inside of the negative pressure cylinder is slidably connected to a piston plate, and the piston plate is fixedly connected to the sliding frame through an operating rod;

[0013] The top of the piston end is fixedly connected to a first sampling cylinder for inserting into the sampling tube through a pipeline. One end of the first sampling cylinder is provided with a plurality of first openings, and the outer surface of the first sampling cylinder is connected to a first sealing sleeve.

[0014] Preferably, the fixed frame is internally slidably connected to an L-shaped movable frame, one end of the L-shaped movable frame is fixedly connected to a positioning sleeve for limiting the bottom of the storage bottle, the internal thread of the fixed frame is connected to a screw rod, and the screw rod is connected to the internal thread of the L-shaped movable frame.

[0015] Preferably, the top of the piston end is fixedly connected to a second sampling cylinder for inserting into the sampling tube through a pipeline, one end of the second sampling cylinder is provided with a plurality of second openings, and the outer surface of the second sampling cylinder is connected to a second sealing sleeve;

[0016] An air guide hole is opened inside the piston end, and the bottom of the air guide hole is conical and inward-retracted. The inside of the air guide hole is slidably connected to an identification rod through a bracket. The bottom end of the identification rod is fixedly connected to a conical plugging head for plugging the air guide hole, and the bottom of the conical plugging head is fixedly connected to a buoyancy block.

[0017] Preferably, the lifting member includes a threaded rod rotatably connected to the inside of the mounting frame, the outer surface of the threaded rod is threadedly connected to a threaded block, the threaded block is fixedly connected to the sliding frame, the inner side surface of the mounting frame is fixedly connected to a motor for driving the threaded rod to rotate forward and reverse, and the output shaft of the motor is fixedly connected to one end of the threaded rod.

[0018] Preferably, the inner side surface of the mounting frame is fixedly connected with a guide rod, the outer surface of the guide rod is slidably connected with a guide frame, and the guide frame is fixedly connected to the sliding frame;

[0019] The interior of the sliding frame is slidably connected to two sliding rods, and one end of the two sliding rods is fixedly connected to the fixing frame through a connecting frame.

[0020] (III) Beneficial effects

[0021] Compared with the prior art, the present invention provides a harmful substance detection device for microbial degradation, which has the following beneficial effects:

[0022] 2. The present invention controls the interior of the sampling tube through the arrangement of a valve member. By inserting the first sampling cylinder in the sampling member, the first sampling cylinder can press the sliding plate, and then drive the conical piston to move away from the interior of the annular block through the connecting rod, so that the degradation tank is connected with the interior of the first sampling cylinder through the sampling tube, forming a valve opening operation, and sampling can be carried out. On the contrary, by withdrawing the first sampling cylinder, the sliding plate can be squeezed through the elastic force of the spring itself, indirectly driving the conical piston to insert into the interior of the annular block, forming an automatic sealing operation, having good automatic opening and closing functions, and no manual control by the staff is required, thereby improving the convenience of operation.

[0023] 3. The present invention inserts the second sampling barrel into the sampling tube and cooperates with the pressure inside the degradation tank so that the liquid inside the degradation tank can be discharged into the storage bottle through the sampling tube and the second sampling barrel to form a handheld sampling operation, which has multiple sampling functions and improves the functionality of the harmful substance detection device. The liquid inside the degradation tank is discharged into the storage bottle through the second sampling barrel, and the original air pressure inside the storage bottle can be released through the air guide hole, and the buoyancy block and the conical plugging head are synchronously driven to rise through the liquid level height. Through the setting of the conical plugging head, the bottom end of the air guide hole can be sealed and blocked, which not only can quantitative sampling be achieved, but also can effectively prevent the spraying of liquid during sampling, thereby improving the convenience of manual sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the harmful substance detection device for microbial degradation of the present invention;

[0025] Figure 2 It is a structural cross-sectional view of the harmful substance detection device for microbial degradation of the present invention;

[0026] Figure 3 For the present invention Figure 1 A schematic diagram of the structure of the middle mounting frame;

[0027] Figure 4 For the present invention Figure 3 A schematic diagram of the combination of the lifting assembly and the sampling mechanism;

[0028] Figure 5 For the present invention Figure 4 A combined cross-sectional view of the middle lifting assembly and the sampling mechanism;

[0029] Figure 6 For the present invention Figure 4 Schematic diagram of the connection between the middle fixing frame and the negative pressure cylinder;

[0030] Figure 7 For the present invention Figure 4 A schematic diagram of the structure of the middle lifting assembly;

[0031] Figure 8 It is a structural schematic diagram of the storage bottle of the present invention;

[0032] Fig. 9 For the present invention Figure 8 Structural cross-sectional view of the storage bottle.

[0033] In the figure: 1. Degradation tank; 2. Sampling tube;

[0034] 3. Valve member; 31. Ring block; 32. Conical piston; 33. Spring; 34. Sliding plate;

[0035] 4. Mounting frame;

[0036] 5. Lifting assembly; 51. Sliding frame; 52. Threaded rod; 53. Threaded block; 54. Motor; 55. Guide rod; 56. Guide frame; 57. Sliding rod; 58. Electric cylinder;

[0037] 6. Sampling mechanism; 61. Fixed frame; 62. Negative pressure cylinder; 63. Piston end; 64. L-shaped moving frame; 65. Positioning sleeve; 66. Screw rod;

[0038] 67, storage bottle; 671, second sampling tube; 672, air guide hole; 673, identification rod; 674, conical plug; 675, buoyancy block;

[0039] 68. sampling piece; 681. negative pressure tube; 682. exhaust pipe; 683. piston plate; 684. operating rod; 685. first sampling cylinder. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] Embodiment 1:

[0042] See attached Figure 1-9 , a harmful substance detection device for microbial degradation, comprising a degradation tank 1, the outer surface of the degradation tank 1 is fixedly connected with a plurality of sampling tubes 2 from top to bottom, and a valve member 3 is arranged inside the plurality of sampling tubes 2;

[0043] A plurality of sampling tubes 2 are fixedly connected in sequence from top to bottom through the outer surface of the degradation tank 1, so as to sample harmful substances at different levels, thus meeting the subsequent detection of harmful substances at different levels;

[0044] The outer surface of the degradation tank 1 is fixedly connected with a mounting frame 4, and a lifting assembly 5 is arranged inside the mounting frame 4. The lifting assembly 5 includes a sliding frame 51 that can be driven up and down, an electric cylinder 58 fixed inside the sliding frame 51, and a lifting member for driving the sliding frame 51 up and down;

[0045] The lifting member is provided to drive the sliding frame 51 to move up and down, thereby satisfying the sampling work at different depths;

[0046] The sliding frame 51 of the lifting assembly 5 is connected to a sampling mechanism 6, which includes a fixed frame 61, a negative pressure cylinder 62, a piston head 63, a storage bottle 67, and a sampling member 68 for sampling through the sampling tube 2. The telescopic end of the electric cylinder 58 is fixedly connected to the fixed frame 61;

[0047] By setting the lifting member in the lifting assembly 5, the sliding frame 51 can be driven to move up and down, thereby meeting the extraction of harmful substances at different levels. By starting the electric cylinder 58 in the lifting assembly 5, the sampling mechanism 6 can be driven to move sideways, thereby driving the sampling member 68 to communicate with the sampling tube 2. Through the negative pressure inside the negative pressure cylinder 62, the sample inside the degradation tank 1 can be extracted through the sampling member 68 and the sampling tube 2, and stored in the storage bottle 67, which not only meets the extraction of samples at different levels and improves the comprehensiveness of its harmful substance detection, but also reduces the pollution of the sampling mechanism 6, and has a good sampling and detection function;

[0048] The invention solves the problem that the existing harmful substance detection devices usually use pipes and pumps to perform sampling at different heights. Since the degradation tank 1 is large in size, the required pipe length is large. During the sampling process, the samples sampled in the early stage are easy to remain in the pipe, which not only causes pipe pollution but also affects the effect of subsequent sample extraction.

[0049] See attached Figure 5 The valve member 3 includes an annular block 31 fixed inside the sampling tube 2, the interior of the annular block 31 is a tapered through hole, and a tapered piston 32 is arranged inside the annular block 31, a spring 33 is connected to one side of the annular block 31, and a sliding plate 34 is fixedly connected to one end of the spring 33, the sliding plate 34 is slidably connected to the interior of the sampling tube 2, and the sliding plate 34 is fixedly connected to the tapered piston 32 through a connecting rod;

[0050] The valve member 3 is provided to control the interior of the sampling tube 2. By inserting the first sampling cylinder 685 in the sampling member 68, the first sampling cylinder 685 can press the sliding plate 34, and then drive the conical piston 32 to move away from the interior of the annular block 31 through the connecting rod, so that the degradation tank 1 is connected with the interior of the first sampling cylinder 685 through the sampling tube 2, forming a valve opening operation, and sampling can be carried out;

[0051] On the contrary, by pulling out the first sampling tube 685, the sliding plate 34 can be squeezed through the elastic force of the spring 33 itself, indirectly driving the conical piston 32 to insert into the interior of the annular block 31, forming an automatic sealing operation, with good automatic control function, no manual control by the staff, which improves the convenience of operation.

[0052] See attached Figure 4 , Figure 5 and Figure 6 , the negative pressure cylinder 62 is fixed to the top of the fixing frame 61, the storage bottle 67 is detachably mounted on one side of the fixing frame 61, and the piston end 63 is inserted into the top port of the storage bottle 67;

[0053] The negative pressure cylinder 62 and the storage bottle 67 are both connected to the fixed frame 61, so that when the fixed frame 61 is pushed by the electric cylinder 58, the negative pressure cylinder 62 and the storage bottle 67 can be synchronously driven to move sideways, and then the sampling tube 2 is connected to the storage bottle 67 through the sampling piece 68.

[0054] See attached Figure 5 and Figure 6 The sampling member 68 includes a negative pressure tube 681 fixedly connected to the top of the piston end 63, one end of the negative pressure tube 681 is connected to the inside of the negative pressure cylinder 62, and one side of the negative pressure cylinder 62 is fixedly connected to an exhaust pipe 682, and both the negative pressure tube 681 and the exhaust pipe 682 are installed with a one-way valve, and the inside of the negative pressure cylinder 62 is slidably connected to a piston plate 683, and the piston plate 683 is fixedly connected to the sliding frame 51 through an operating rod 684;

[0055] The piston plate 683 is fixedly connected to the sliding frame 51 by the operating rod 684, so that when the sampling mechanism 6 moves sideways, its negative pressure cylinder 62 can not only move toward the position of the sampling tube 2 to form a connection, but also the piston plate 683 can move in the opposite direction inside the negative pressure cylinder 62, so that a negative pressure is formed inside the negative pressure cylinder 62, and then the gas inside the storage bottle 67 can be extracted to form a negative pressure state, and the first sampling cylinder 685 is connected to the inside of the sampling tube 2, and the sampling work can be formed through the negative pressure driving force. It not only has the function of lateral movement connection, but also can synchronously perform negative pressure driving work, has a good linkage and combination function, reduces the use of electric drive sources, and improves the energy saving and environmental protection of the sampling device;

[0056] The negative pressure tube 681 is connected to the inside of the negative pressure cylinder 62 in a detachable manner, so that the staff can manually remove the sampling piece 68 later, thus forming a convenient cleaning work later;

[0057] The top of the piston end 63 is fixedly connected to a first sampling cylinder 685 for inserting into the sampling tube 2 through a pipeline. One end of the first sampling cylinder 685 is provided with a plurality of first openings, and the outer surface of the first sampling cylinder 685 is connected to a first sealing sleeve.

[0058] The first sampling cylinder 685 is provided to be inserted into the sampling tube 2, and through a plurality of first openings, the sample inside the sampling tube 2 enters into the first sampling cylinder 685, and finally passes into the storage bottle 67; the first sealing sleeve is provided to improve the sealing performance of the combination of the two, so as to avoid leakage problems during the sampling process.

[0059] See attached Figure 6 The fixed frame 61 is internally slidably connected with an L-shaped movable frame 64, one end of the L-shaped movable frame 64 is fixedly connected with a positioning sleeve 65 for limiting the bottom of the storage bottle 67, the internal thread of the fixed frame 61 is connected with a screw rod 66, and the screw rod 66 is connected with the internal thread of the L-shaped movable frame 64;

[0060] The positioning sleeve 65 is used to position the bottom of the storage bottle 67 to ensure the stability of the storage bottle 67 during sampling and the tightness of the connection between the piston end 63 and the storage bottle 67;

[0061] By manually rotating the screw rod 66, the L-shaped movable frame 64 can be driven to move up and down. The up and down movement of the L-shaped movable frame 64 can drive the positioning sleeve 65 to move up and down. The upward movement of the positioning sleeve 65 can lift the storage bottle 67 upward so that the piston end 63 is inserted into the storage bottle 67, and then the sampling piece 68 is sealed and connected with the storage bottle 67, which is convenient for the staff to replace the storage bottle 67. It has good disassembly and assembly functions and improves the convenience of operation.

[0062] Embodiment 2: Based on embodiment 1, the difference is that;

[0063] See attached Figure 8 and Fig. 9 The top of the piston end 63 is fixedly connected to a second sampling cylinder 671 for inserting into the sampling tube 2 through a pipeline, and one end of the second sampling cylinder 671 is provided with a plurality of second openings, and the outer surface of the second sampling cylinder 671 is connected to a second sealing sleeve;

[0064] By inserting the piston end 63 into the top end of the storage bottle 67, the piston end 63 is sealed and connected with the storage bottle 67. By inserting the second sampling cylinder 671 into the sampling tube 2, the liquid in the degradation tank 1 can be discharged into the storage bottle 67 through the sampling tube 2 and the second sampling cylinder 671 in accordance with the pressure inside the degradation tank 1, so as to form a handheld sampling operation, which has multiple sampling functions and improves the functionality of the harmful substance detection device.

[0065] An air guide hole 672 is provided inside the piston end 63, and the bottom of the air guide hole 672 is in a conical inward-contracted shape. An identification rod 673 is slidably connected to the inside of the air guide hole 672 through a bracket. A conical plugging head 674 for plugging the air guide hole 672 is fixedly connected to the bottom end of the identification rod 673, and a buoyancy block 675 is fixedly connected to the bottom of the conical plugging head 674.

[0066] The liquid inside the degradation tank 1 is discharged into the storage bottle 67 through the second sampling tube 671, and the original air pressure inside the storage bottle 67 can be released through the air guide hole 672, and the buoyancy block 675 and the conical plugging head 674 are synchronously driven to rise through the liquid level. Through the setting of the conical plugging head 674, the bottom end of the air guide hole 672 can be sealed and blocked, which not only allows quantitative sampling, but also effectively prevents the spraying of liquid during sampling, thereby improving the convenience of manual sampling.

[0067] Embodiment 3: Based on embodiment 1, the difference is that;

[0068] See attached Figure 3 , Figure 4 and Figure 7 The lifting member includes a threaded rod 52 rotatably connected to the inside of the mounting frame 4, a threaded block 53 is threadedly connected to the outer surface of the threaded rod 52, the threaded block 53 is fixedly connected to the sliding frame 51, and a motor 54 for driving the threaded rod 52 to rotate forward and reverse is fixedly connected to the inner side surface of the mounting frame 4, and the output shaft of the motor 54 is fixedly connected to one end of the threaded rod 52;

[0069] The motor 54 is connected to an external power supply and a control switch, and is a forward and reverse motor. It is set up using the connection method and encoding method of the prior art, and is used to drive the threaded rod 52 to rotate forward and reverse. The forward and reverse rotation of the threaded rod 52 can drive the threaded block 53 to move up and down, and then drive the sliding frame 51 to slide up and down, and finally drive the sampling mechanism 6 to adjust the height to meet the sampling and detection work at different heights. The lifting member also includes an electric telescopic rod for driving the sliding frame 51 up and down.

[0070] The inner side surface of the mounting frame 4 is fixedly connected with a guide rod 55, and the outer surface of the guide rod 55 is slidably connected with a guide frame 56, and the guide frame 56 is fixedly connected to the sliding frame 51;

[0071] The guide rod 55 and the guide frame 56 are provided to improve the smoothness and guidance of the up and down movement of the sliding frame 51;

[0072] The sliding frame 51 is internally slidably connected to two sliding rods 57, and one end of the two sliding rods 57 is fixedly connected to the fixing frame 61 through a connecting frame;

[0073] The two sliding rods 57 are provided to improve the smoothness of the telescopic movement of the fixing frame 61 , and indirectly improve the positioning of the first sampling cylinder 685 in the sampling mechanism 6 when inserted into the sampling tube 2 .

[0074] It should be noted that the term "comprises" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also includes other elements that are not explicitly listed, or also includes elements inherent to such process, method, article, or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article, or device that includes the element.

[0075] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A harmful substance detection device for microbial degradation, comprising a degradation tank (1), characterized in that: The outer surface of the degradation tank (1) is fixedly connected to a plurality of sampling tubes (2) in sequence from top to bottom, and valve components (3) are arranged inside the plurality of sampling tubes (2); The outer surface of the degradation tank (1) is fixedly connected to a mounting frame (4), the interior of the mounting frame (4) is provided with a lifting assembly (5), the lifting assembly (5) comprising a sliding frame (51) that can be driven up and down, an electric cylinder (58) fixed inside the sliding frame (51), and a lifting member used to drive the sliding frame (51) up and down; A sampling mechanism (6) is connected to the sliding frame (51) of the lifting assembly (5), and the sampling mechanism (6) comprises a fixed frame (61), a negative pressure cylinder (62), a piston end (63), a storage bottle (67), and a sampling piece (68) for sampling through the sampling tube (2), and the telescopic end of the electric cylinder (58) is fixedly connected to the fixed frame (61); By setting the lifting member in the lifting assembly (5), the sliding frame (51) is driven to move up and down, thereby satisfying the extraction of harmful substances at different levels. By starting the electric cylinder (58), the sampling mechanism (6) is driven to move sideways, thereby driving the sampling member (68) to communicate with the sampling tube (2). Through the negative pressure inside the negative pressure cylinder (62), the sample inside the degradation tank (1) can be extracted through the sampling member (68) and the sampling tube (2) and stored in the storage bottle (67); The negative pressure cylinder (62) is fixed to the top of the fixing frame (61), the storage bottle (67) is detachably mounted on one side of the fixing frame (61), and the piston head (63) is inserted into the top port of the storage bottle (67); The negative pressure cylinder (62) and the storage bottle (67) are both connected to the fixed frame (61), so that when the fixed frame (61) is pushed by the electric cylinder (58), the negative pressure cylinder (62) and the storage bottle (67) are simultaneously driven to move sideways, and then the sampling tube (2) is connected to the storage bottle (67) through the sampling piece (68). The sampling member (68) includes a negative pressure tube (681) fixedly connected to the top of the piston end (63), one end of the negative pressure tube (681) is connected to the inside of the negative pressure cylinder (62), one side of the negative pressure cylinder (62) is fixedly connected to an exhaust pipe (682), both the negative pressure tube (681) and the exhaust pipe (682) are equipped with a one-way valve, the inside of the negative pressure cylinder (62) is slidably connected to a piston plate (683), and the piston plate (683) is fixedly connected to the sliding frame (51) via an operating rod (684); The top of the piston end (63) is fixedly connected to a first sampling cylinder (685) for inserting into the sampling tube (2) through a pipeline, one end of the first sampling cylinder (685) is provided with a plurality of first openings, and the outer surface of the first sampling cylinder (685) is connected to a first sealing sleeve; The piston plate (683) is fixedly connected to the sliding frame (51) by means of an operating rod (684), so that when the sampling mechanism (6) moves sideways, its negative pressure cylinder (62) not only moves toward the position of the sampling tube (2) to form a connection, but also the piston plate (683) moves in the opposite direction inside the negative pressure cylinder (62), so that negative pressure is formed inside the negative pressure cylinder (62), thereby extracting gas inside the storage bottle (67) to form a negative pressure state.

2. A harmful substance detection device for microbial degradation according to claim 1, characterized in that: The valve member (3) comprises an annular block (31) fixed inside the sampling tube (2); the interior of the annular block (31) is in the shape of a tapered through hole, and a tapered piston (32) is arranged inside the annular block (31); a spring (33) is connected to one side of the annular block (31), and a sliding plate (34) is fixedly connected to one end of the spring (33); the sliding plate (34) is slidably connected to the interior of the sampling tube (2), and the sliding plate (34) is fixedly connected to the tapered piston (32) via a connecting rod.

3. A harmful substance detection device for microbial degradation according to claim 1, characterized in that: The interior of the fixed frame (61) is slidably connected to an L-shaped movable frame (64); one end of the L-shaped movable frame (64) is fixedly connected to a positioning sleeve (65) for limiting the bottom position of a storage bottle (67); the interior of the fixed frame (61) is threadedly connected to a screw rod (66), and the screw rod (66) is threadedly connected to the interior of the L-shaped movable frame (64).

4. A harmful substance detection device for microbial degradation according to claim 1, characterized in that: The lifting member comprises a threaded rod (52) rotatably connected to the interior of the mounting frame (4); a threaded block (53) is threadedly connected to the outer surface of the threaded rod (52); the threaded block (53) is fixedly connected to the sliding frame (51); a motor (54) for driving the threaded rod (52) to rotate forward and reverse is fixedly connected to the inner side surface of the mounting frame (4); an output shaft of the motor (54) is fixedly connected to one end of the threaded rod (52).

5. A harmful substance detection device for microbial degradation according to claim 4, characterized in that: The inner side surface of the mounting frame (4) is fixedly connected to a guide rod (55), the outer surface of the guide rod (55) is slidably connected to a guide frame (56), and the guide frame (56) is fixedly connected to the sliding frame (51); The sliding frame (51) is internally slidably connected to two sliding rods (57), and one end of the two sliding rods (57) is fixedly connected to the fixing frame (61) via a connecting frame.

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