Portable sewage sampling device

Abstract

The invention discloses a portable sewage sampling device, and relates to the technical field of sewage sampling, and the portable sewage sampling device comprises a traction rope used for pulling and putting the sampling device, a collection cylinder used for material taking operation, and a plugging cover arranged at the lower end of the collection cylinder and used for plugging the lower end of the collection cylinder. Through mutual cooperation of the sinking steering assembly, the sampling assembly, the plugging assembly, the transmission assembly, the lifting assembly and other parts, the liquid inlets of the sampling boxes can be sequentially opened, liquid inlet sampling operation is performed, various sewage sampling operations on sewage flowing in a specified water area are completed, and the whole sampling device is simple in structure, convenient to use and high in practicability. The device is simple in structure, easy to operate and convenient to carry and use in daily life, sampling frequency can be adjusted and controlled in a self-adaptive mode according to the speed change of water flow in the sampling process, the representativeness and accuracy of samples are improved, and meanwhile the detection and analysis efficiency and quality are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage sampling, and specifically to a portable sewage sampling device. Background Art

[0002] During the process of the sewage sampling device performing sampling operations on flowing sewage, in order to ensure the representativeness of the samples, improve the detection accuracy, analyze the changing trend of sewage, and meet different detection requirements, etc., the sewage sampling device needs to sample the flowing sewage multiple times.

[0003] During the process of the sewage sampling device sampling the flowing sewage multiple times, due to the change in the water flow of the flowing sewage itself, and the sampling frequency on the actual sewage sampling device is relatively fixed, and it cannot be adjusted and switched synchronously according to the change in the actual water flow. When the sewage water flow speed is too fast and the sampling frequency is too slow, due to the low sampling frequency, during the interval between two samplings, a large amount of pollutants with different components in the sewage may flow through quickly, resulting in only collecting the sewage in some time periods, unable to cover the sewage with various components and states in the water flow, and unable to comprehensively reflect the true situation of the sewage, making the sample lack representativeness. When the water flow speed is too slow and the sampling frequency is too fast, in the case of a slow water flow speed, the components and states of the sewage are relatively stable in a short period of time. An excessive sampling frequency will cause the collected samples to be relatively similar in composition and properties. A large number of repeated samples not only cannot provide more valuable information, but also waste manpower, material resources and time. For this reason, we propose a portable sewage sampling device. Summary of the Invention

[0004] The purpose of the present invention is to provide a portable sewage sampling device to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A portable sewage sampling device, including a towing rope for towing and putting the sampling device and a collection cylinder for taking materials, and further includes:

[0006] A plug cover arranged at the lower end of the collection cylinder for blocking the lower end of the collection cylinder. The plug cover is detachably installed and connected to the lower end of the collection cylinder by means of threads. The plug cover is provided with a sinking and turning component for assisting the whole sampling device to sink to the bottom and adjust the turning. A plurality of sampling components for sampling are arranged inside the collection cylinder;

[0007] The sampling component includes a sampling box disposed inside the collection cylinder. A positioning component for assisting in the positioning and placement of the sampling box is provided between the inside of the collection cylinder and the sampling box. The sampling box is provided with a liquid inlet for sampling liquid. A plugging component for plugging the liquid inlet is disposed inside the sampling box. A linkage ring is sleeved outside the collection cylinder. A transmission component for driving the plugging component is provided on the linkage ring. A lifting component for driving the lifting of the linkage ring is provided outside the collection cylinder. An installation box is installed at the upper end of the collection cylinder. A control component for controlling the lifting speed according to the water flow velocity of the detected water area is provided on the installation box. One end of the traction rope is fixed to the upper end of the installation box.

[0008] Preferably, the plugging component includes a positioning groove opened on the inner side of the sampling box and communicated with the liquid inlet. A plugging plate for plugging the liquid inlet is connected to the inner side of the positioning groove through a telescopic component. A transmission rod is disposed inside the liquid inlet. One end of the transmission rod is fixed to the plugging plate, and the other end of the transmission rod is located outside the sampling box.

[0009] Preferably, the transmission component includes an installation frame fixed to the inner side of the linkage ring. An inclined surface for abutting and driving the end of the transmission rod is provided at the lower end of the installation frame. A communication hole for sampling and conveying is opened on the linkage ring.

[0010] Preferably, the lifting component includes a lifting plate fixed to the outside of the linkage ring. A threaded sleeve is fixed to the lifting plate. A threaded rod is threadedly engaged with the threaded sleeve. Two groups of installation rods are symmetrically and slidably connected to the lifting plate. An installation seat is fixed to the outside of the collection cylinder. The threaded rod and the installation rods are installed between the installation seat and the installation box.

[0011] Preferably, the control component includes an installation shaft rotatably connected to the installation box. A fan blade is fixed to the installation shaft. A plurality of circulation holes for assisting in liquid circulation and conveying are penetrated through the installation box. Each of the circulation holes is located on one side of the installation shaft, and the directions of each of the circulation holes are the same as the liquid inlet directions of each of the sampling boxes. The installation shaft and the threaded rod are connected and driven through a linkage component.

[0012] Preferably, the linkage component includes a connecting shaft rotatably connected to the installation box. One end of the connecting shaft is fixed to one end of the threaded rod. Pulley wheels are fixed to the connecting shaft and the installation shaft. The two pulley wheels are connected and driven through a belt.

[0013] Preferably, the telescopic component includes T-shaped rods slidably connected to the plugging plate. One ends of the two T-shaped rods are fixed to the inner side of the positioning groove. Springs are sleeved outside the T-shaped rods. The two ends of each spring are respectively connected to the plugging plate and the end of the T-shaped rod.

[0014] Preferably, the positioning component includes two groups of arc-shaped grooves symmetrically arranged on the sampling box, and two groups of arc-shaped positioning plates matching the arc-shaped grooves are fixed inside the collection cylinder.

[0015] Preferably, the sinking and turning component includes a support rod fixed to the lower end of the plug cover. The lower end of the support rod is rotatably connected to a gravity disk for assisting in sinking, and two groups of symmetrically arranged pressure plates are fixed to the outer side of the support rod.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] Through the mutual cooperation of components such as the sinking and turning component, the sampling component, the blocking component, the transmission component, and the lifting component, the present invention can sequentially open the liquid inlet of each sampling box and perform liquid inlet sampling operations, completing multiple sewage sampling operations on the flowing sewage in the specified water area. The entire sampling device has a simple and convenient structure, is easy to operate, is convenient for daily portable use, and during the sampling process, the sampling frequency can be adaptively adjusted and controlled according to the change in the water flow speed, improving the representativeness and accuracy of the samples while enhancing the detection and analysis efficiency and quality. Description of the Drawings

[0018] Figure 1 is a schematic diagram of the overall external structure of the present invention;

[0019] Figure 2 is a schematic diagram of the state of the collection cylinder before the sinking and turning component of the present invention adjusts the turning;

[0020] Figure 3 is a schematic diagram of the state of the collection cylinder after the sinking and turning component of the present invention adjusts the turning;

[0021] Figure 4 is a schematic diagram of the positional relationship between the collection cylinder and multiple sampling boxes of the present invention;

[0022] Figure 5 is a schematic diagram of the structure of the positioning component of the present invention;

[0023] Figure 6 is a schematic diagram of the structure of the transmission component of the present invention;

[0024] Figure 7 is a schematic diagram of the structure of the blocking component and the telescopic component of the present invention;

[0025] Figure 8 is a schematic diagram of the state of the blocking component after the transmission component of the present invention drives it;

[0026] Figure 9 is a schematic diagram of the positional relationship between the linkage ring and the collection cylinder of the present invention;

[0027] Figure 10 Schematic structural diagram of the lifting component of the present invention;

[0028] Figure 11 Schematic structural diagram of the control component and linkage component of the present invention;

[0029] Figure 12 Schematic diagram of the state of the control component of the present invention during the control transmission process;

[0030] Figure 13 Schematic diagram of the state of the liquid inlet and the sewage water flow direction after the steering adjustment of the support rod of the present invention.

[0031] In the figure: 101 - towing rope; 102 - collection cylinder; 2 - plug cover; 301 - support rod; 302 - gravity disc; 303 - pressure plate; 401 - sampling box; 402 - liquid inlet; 501 - arc groove; 502 - arc positioning plate; 601 - positioning groove; 602 - sealing plate; 603 - transmission rod; 701 - T-shaped rod; 702 - spring; 8 - linkage ring; 901 - mounting bracket; 902 - inclined surface; 903 - communication hole; 1001 - lifting plate; 1002 - threaded sleeve; 1003 - threaded rod; 1004 - mounting rod; 1005 - mounting seat; 12 - mounting box; 1301 - mounting shaft; 1302 - fan blade; 1303 - circulation hole; 1401 - connecting shaft; 1402 - pulley; 1403 - belt. Specific embodiments

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] Embodiment 1

[0034] Please refer to Figures 1-13 , a portable sewage sampling device shown in the figure, including a towing rope 101 for towing and putting the sampling device and a collection cylinder 102 for sampling operation, and further including:

[0035] A plug cover 2 provided at the lower end of the collection cylinder 102 for blocking the lower end of the collection cylinder 102. The plug cover 2 is detachably installed and connected to the lower end of the collection cylinder 102 by means of threads. The plug cover 2 is provided with a sinking and steering adjustment component for assisting the entire sampling device to sink to the bottom and turn. A plurality of sampling components for sampling are arranged inside the collection cylinder 102;

[0036] The sampling assembly includes a sampling box 401 disposed inside the collection cylinder 102. A positioning assembly for assisting in the positioning and placement of the sampling box 401 is provided between the inside of the collection cylinder 102 and the sampling box 401. The sampling box 401 is provided with a liquid inlet 402 for sampling liquid inflow. A blocking assembly for blocking the liquid inlet 402 is arranged inside the sampling box 401. A linkage ring 8 is sleeved outside the collection cylinder 102. A transmission assembly for driving the blocking assembly is arranged on the linkage ring 8. A lifting assembly for driving the lifting of the linkage ring 8 is arranged outside the collection cylinder 102. An installation box 12 is installed at the upper end of the collection cylinder 102. A control assembly for controlling the lifting speed according to the water flow velocity of the detected water area is arranged on the installation box 12. One end of the towing rope 101 is fixed to the upper end of the installation box 12;

[0037] It should be noted here that: through the mutual cooperation of components such as the bottom-sinking steering assembly, the sampling assembly, the blocking assembly, the transmission assembly and the lifting assembly, the liquid inlets 402 of each group of sampling boxes 401 can be opened in sequence and the liquid inflow sampling operation can be carried out, so as to complete the sewage sampling operation for multiple times on the flowing sewage in the specified water area. The whole sampling device has a simple and convenient structure, is easy to operate, is convenient for daily portable use, and during the sampling process, the sampling frequency can be adaptively adjusted and controlled according to the change of the water flow velocity, improving the sample representativeness and accuracy while enhancing the detection and analysis efficiency and quality.

[0038] Preferably, the blocking assembly includes a positioning groove 601 opened on the inner side of the sampling box 401 and communicated with the liquid inlet 402. A blocking plate 602 for blocking the liquid inlet 402 is connected to the inner side of the positioning groove 601 through a telescopic assembly. A transmission rod 603 is arranged inside the liquid inlet 402. One end of the transmission rod 603 is fixed to the blocking plate 602, and the other end of the transmission rod 603 is located outside the sampling box 401;

[0039] It should be noted here that: through the telescopic assembly, the blocking plate 602 abuts against the positioning groove 601 to block the liquid inlet 402, and through the blocking effect, the overflow of the collected sewage is avoided.

[0040] Preferably, the transmission assembly includes a mounting frame 901 fixed to the inner side of the linkage ring 8. An inclined surface 902 for abutting and driving the end of the transmission rod 603 is arranged at the lower end of the mounting frame 901. A communication hole 903 for sampling and conveying is opened on the linkage ring 8;

[0041] It should be noted here that: through transmission, the lifting plate 1001 and the linkage ring 8 are forced to move downward from the outside of the collection cylinder 102. During the movement of the linkage ring 8, the inclined surface 902 on the mounting bracket 901 successively abuts against the end of the transmission rod 603 on each sampling box 401. During the process of the inclined surface 902 abutting against the end of the transmission rod 603, the blocking plate 602 at one end of the transmission rod 603 is pushed out of the positioning groove 601, so that the liquid inlet 402 is no longer in a blocked state. At this time, the sewage flowing outside is transported to the inside of the sampling box 401 through the communication hole 903 and the liquid inlet 402 for collection.

[0042] Preferably, the lifting assembly includes a lifting plate 1001 fixed to the outside of the linkage ring 8. A threaded sleeve 1002 is fixed on the lifting plate 1001. A threaded rod 1003 is threadedly engaged with the threaded sleeve 1002. Two sets of mounting rods 1004 are symmetrically and slidably connected to the lifting plate 1001. A mounting seat 1005 is fixed to the outside of the collection cylinder 102. The threaded rod 1003 and the mounting rods 1004 are installed between the mounting seat 1005 and the mounting box 12;

[0043] It should be noted here that: through transmission, the connecting shaft 1401 and the threaded rod 1003 are driven to rotate. During the rotation of the threaded rod 1003, through the mutual meshing transmission between the threaded rod 1003 and the threaded sleeve 1002 and the guiding action of the mounting rod 1004 on the lifting plate 1001 after being stressed, the lifting plate 1001 and the linkage ring 8 are forced to perform lifting movement on the outside of the collection cylinder 102.

[0044] Preferably, the control assembly includes a mounting shaft 1301 rotatably connected to the mounting box 12. A fan blade 1302 is fixed on the mounting shaft 1301. A plurality of circulation holes 1303 for assisting the circulation and transportation of liquid are penetrated through the mounting box 12. Each group of circulation holes 1303 is located on one side of the mounting shaft 1301, and the directions of each group of circulation holes 1303 are the same as the liquid inlet 402 of each sampling box 401. The mounting shaft 1301 and the threaded rod 1003 are connected and driven through a linkage assembly; the linkage assembly includes a connecting shaft 1401 rotatably connected to the mounting box 12. One end of the connecting shaft 1401 is fixed to one end of the threaded rod 1003. Pulley wheels 1402 are fixed on the connecting shaft 1401 and the mounting shaft 1301. The two pulley wheels 1402 are connected and driven through a belt 1403;

[0045] It should be noted here that after the turning adjustment of the collection cylinder 102, the flowing sewage to be sampled passes through the installation box 12 through the connection of each group of through holes 1303 on the installation box 12. During the passing process, through the counteracting driving effect of the sewage and the internal fan blades 1302 of the installation box 12, the installation shaft 1301 rotates. During the rotation of the installation shaft 1301, through the connection and driving effect between the pulley 1402 and the two belts 1403, the connecting shaft 1401 and the threaded rod 1003 are driven to rotate;

[0046] It should be noted here that through the arrangement that each group of through holes 1303 are all located on one side of the installation shaft 1301, the flowing sewage passes through one side of the installation shaft 1301, which is convenient for more efficient rotation driving operation.

[0047] Preferably, the telescopic assembly includes a T-shaped rod 701 slidably connected to the plugging plate 602. One ends of the two T-shaped rods 701 are fixed to the inner side of the positioning groove 601. A spring 702 is sleeved on the outer side of the T-shaped rod 701. Two ends of the spring 702 are respectively connected to the plugging plate 602 and the end of the T-shaped rod 701;

[0048] It should be noted here that through the T-shaped rod 701, the telescopic sliding of the plugging plate 602 is assisted under force, and through the spring 702, the reset movement of the plugging plate 602 after movement is facilitated.

[0049] Preferably, the positioning assembly includes two groups of arc-shaped grooves 501 symmetrically arranged on the sampling box 401. Two arc-shaped positioning plates 502 matching the arc-shaped grooves 501 are fixed inside the collection cylinder 102;

[0050] It should be noted here that through the arc-shaped grooves 501 and the arc-shaped positioning plates 502, the positioning operation of the placed sampling box 401 is carried out.

[0051] Preferably, the bottom-sinking turning assembly includes a support rod 301 fixed to the lower end of the plug 2. The lower end of the support rod 301 is rotatably connected to a gravity disk 302 for assisting in sinking to the bottom. Two symmetrically arranged pressure plates 303 are fixed to the outer side of the support rod 301;

[0052] It should be noted here that: when the entire sampling device is put into the flowing sewage water area to be sampled, during the process of putting it in, due to the gravitational traction of the gravity disk 302, the collection cylinder 102 is pulled to move downward in the sewage water area until the gravity disk 302 abuts against the bottom of the water area, and then the collection cylinder 102 stops moving downward. At this time, through the abutting and transmission action of the flowing sewage in the water area to be sampled and the two pressure plates 303 on the support rod 301, the support rod 301 is pushed to rotate until the two pressure plates 303 on the support rod 301 are parallel to the water flow direction. Through the adaptive rotation of the support rod 301 according to the water flow direction, the plug cover 2 and the collection cylinder 102 are driven to rotate synchronously. Through the rotation of the collection cylinder 102, the liquid inlet 402 of each sampling box 401 filled inside the collection cylinder 102 and each flow hole 1303 on the installation box 12 are arranged opposite to the sewage flow direction, which is convenient for subsequent more efficient sewage sampling collection and sewage circulation operations.

[0053] In this solution: a portable sewage sampling device includes the following steps:

[0054] During the process of using the sampling device to perform multiple sampling operations on flowing sewage, multiple sampling boxes 401 are sequentially pushed into the inside of the collection cylinder 102 through the positioning of the arc-shaped groove 501 and the arc-shaped positioning plate 502. After each sampling box 401 is placed, the plug cover 2 is connected to the lower end of the collection cylinder 102 by means of threads to block the pushed-in sampling box 401.

[0055] After each sampling box 401 is put into the collection cylinder 102 and the collection cylinder 102 is blocked, through the connection of the traction rope 101, the entire sampling device is put into the flowing sewage water area to be sampled. During the process of putting it in, due to the gravitational traction of the gravity disk 302, the collection cylinder 102 is pulled to move downward in the sewage water area until the gravity disk 302 abuts against the bottom of the water area, and then the collection cylinder 102 stops moving downward. At this time, through the abutting and transmission action of the flowing sewage in the water area to be sampled and the two pressure plates 303 on the support rod 301, the support rod 301 is pushed to rotate until the two pressure plates 303 on the support rod 301 are parallel to the water flow direction (see converted from Figure 2 converted to Figure 3In the state of (), the support rod 301 drives the plug cover 2 and the collection cylinder 102 to rotate synchronously according to the self - adaptive rotation in the water flow direction. Through the rotation of the collection cylinder 102, the liquid inlet 402 of each sampling box 401 inside the collection cylinder 102 and each flow - through hole 1303 on the installation box 12 are arranged opposite to the sewage flow direction, which is convenient for more efficient subsequent sewage sampling collection and sewage flow operation. After the collection cylinder 102 is adjusted in rotation direction, the flowing sewage to be sampled passes through the installation box 12 through the connection effect of each flow - through hole 1303 on the installation box 12. During the passing process, through the counter - acting driving effect of the sewage on the fan blade 1302 inside the installation box 12, the installation shaft 1301 rotates. During the rotation of the installation shaft 1301, through the connection and driving effect between the pulley 1402 and the two belts 1403, the connecting shaft 1401 and the threaded rod 1003 are driven to rotate. During the rotation of the threaded rod 1003, through the meshing drive between the threaded rod 1003 and the threaded sleeve 1002 and the guiding effect of the installation rod 1004 on the lifting plate 1001 after being stressed, the lifting plate 1001 and the linkage ring 8 move downward from top to bottom on the outside of the collection cylinder 102. During the movement of the linkage ring 8, the inclined surface 902 on the installation frame 901 abuts against the end of the transmission rod 603 on each sampling box 401 in turn. During the process of the inclined surface 902 abutting against the end of the transmission rod 603, the plug plate 602 at one end of the transmission rod 603 is pushed out of the positioning groove 601, so that the liquid inlet 402 is no longer in the blocked state (see Figure 8 ). At this time, the externally flowing sewage is transported to the inside of the sampling box 401 through the communication hole 903 and the liquid inlet 402 for collection (see Figure 8 ). Therefore, during the downward movement of the linkage ring 8, the liquid inlets 402 of each sampling box 401 can be opened in turn and the liquid inlet sampling operation can be carried out, completing the multiple - time sewage sampling operation on the flowing sewage in the specified water area. The whole sampling device has a simple and convenient structure, is easy to operate, and is convenient for daily portable use;

[0056] Moreover, during the process of the sewage sampling device performing multiple sampling operations on flowing sewage, with the change of the sewage flow rate, through the connection effect of the sewage on each group of through holes 1303 on the installation box 12, the counteraction effect of the flowing sewage on the fan blades 1302, and the connection and transmission effect of the linkage assembly, the descending speed of the linkage ring 8 changes with the change of the sewage flow. The faster the sewage flow, the faster the descending speed of the linkage ring 8. Through the rapid descent of the linkage ring 8, the opening speed of the liquid inlets 402 on each group of sampling boxes 401 is accelerated, realizing a high-frequency sewage collection operation. The slower the sewage flow, the slower the descending speed of the linkage ring 8. Through the slow descent of the linkage ring 8, the opening speed of the liquid inlets 402 on each group of sampling boxes 401 is reduced, realizing a low-frequency sewage collection operation. During the process of performing multiple sewage sampling operations on flowing sewage, the sampling frequency can be adaptively adjusted and controlled according to the change of the water flow speed, improving the sample representativeness and accuracy while enhancing the detection and analysis efficiency and quality.

[0057] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device.

[0058] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made in these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A portable sewage sampling device, comprising: A towing rope (101) for towing and deploying the sampling device and a collection cylinder (102) for material taking operation; It is characterized in that it further comprises: A plug cover (2) arranged at the lower end of the collection cylinder (102) for blocking the lower end of the collection cylinder (102). The plug cover (2) is detachably installed and connected to the lower end of the collection cylinder (102) by means of threads. A sinking and turning assembly for assisting the whole sampling device to sink to the bottom and turn is arranged on the plug cover (2). Inside the collection cylinder (102), multiple sampling assemblies for sampling are arranged; The sampling assembly includes a sampling box (401) arranged inside the collection cylinder (102). A positioning assembly for assisting in positioning and placing the sampling box (401) is arranged between the inside of the collection cylinder (102) and the sampling box (401). An inlet (402) for sampling liquid inlet is opened on the sampling box (401). A blocking assembly for blocking the inlet (402) is arranged inside the sampling box (401). A linkage ring (8) is sleeved outside the collection cylinder (102). A transmission assembly for driving the blocking assembly is arranged on the linkage ring (8). A lifting assembly for driving the linkage ring (8) to lift and lower is arranged outside the collection cylinder (102). An installation box (12) is installed at the upper end of the collection cylinder (102). A control assembly for controlling the lifting speed according to the water flow speed of the detected water area is arranged on the installation box (12). One end of the towing rope (101) is fixed to the upper end of the installation box (12).

2. The portable sewage sampling device according to claim 1, characterized in that: The blocking assembly includes a positioning groove (601) opened inside the sampling box (401) and communicated with the inlet (402). A blocking plate (602) for blocking the inlet (402) is connected to the inside of the positioning groove (601) through a telescopic assembly. A transmission rod (603) is arranged inside the inlet (402). One end of the transmission rod (603) is fixed to the blocking plate (602), and the other end of the transmission rod (603) is outside the sampling box (401).

3. The portable sewage sampling device according to claim 2, wherein: The transmission assembly includes a mounting frame (901) fixed to the inside of the linkage ring (8). An inclined surface (902) for abutting and driving the end of the transmission rod (603) is arranged at the lower end of the mounting frame (901). A communication hole (903) for sampling transmission is opened on the linkage ring (8).

4. The portable sewage sampling device according to claim 3, wherein: The lifting assembly includes a lifting plate (1001) fixed to the outside of the linkage ring (8). A threaded sleeve (1002) is fixed on the lifting plate (1001). A threaded rod (1003) is threadedly engaged with the threaded sleeve (1002). Two mounting rods (1004) are symmetrically and slidably connected to the lifting plate (1001). A mounting seat (1005) is fixed to the outside of the collection cylinder (102). The threaded rod (1003) and the mounting rods (1004) are installed between the mounting seat (1005) and the installation box (12).

5. A portable sewage sampling device according to claim 4, characterized in that: The control component includes a mounting shaft (1301) rotatably connected to the mounting box (12). A fan blade (1302) is fixed on the mounting shaft (1301). A plurality of groups of flow holes (1303) for assisting the flow and transportation of liquid are formed through the mounting box (12). Each group of the flow holes (1303) is located on one side of the mounting shaft (1301), and the directions of each group of the flow holes (1303) are consistent with the liquid inlet (402) of each sampling box (401). The mounting shaft (1301) and the threaded rod (1003) are connected and driven through a linkage component.

6. The portable sewage sampling device according to claim 5, characterized in that: The linkage component includes a connecting shaft (1401) rotatably connected to the mounting box (12). One end of the connecting shaft (1401) is fixed to one end of the threaded rod (1003). Pulley wheels (1402) are fixed on the connecting shaft (1401) and the mounting shaft (1301). The two pulley wheels (1402) are connected and driven through a belt (1403).

7. The portable sewage sampling device according to claim 2, wherein: The telescopic component includes a T-shaped rod (701) slidably connected to the plugging plate (602). One ends of the two T-shaped rods (701) are fixed to the inner side of the positioning groove (601). A spring (702) is sleeved on the outer side of the T-shaped rod (701). The two ends of the spring (702) are respectively connected to the plugging plate (602) and the end of the T-shaped rod (701).

8. A portable sewage sampling device according to claim 1, characterized in that: The positioning component includes two groups of arc-shaped grooves (501) symmetrically arranged on the sampling box (401). Two arc-shaped positioning plates (502) matching with the arc-shaped grooves (501) are fixed inside the collection cylinder (102).

9. The portable sewage sampling device according to claim 1, wherein: The bottom-sinking and turning component includes a support rod (301) fixed to the lower end of the plug cover (2). A gravity disk (302) for assisting in bottom-sinking is rotatably connected to the lower end of the support rod (301). Two symmetrically arranged pressure plates (303) are fixed on the outer side of the support rod (301).

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