A portable sewage sampling device

Abstract

This invention discloses a portable wastewater sampling device, relating to the field of wastewater sampling technology. The portable wastewater sampling device includes a traction rope for deploying the sampling device and a collection cylinder for sampling operations, as well as a cap located at the lower end of the collection cylinder for sealing the lower end. Through the coordinated operation of components such as a bottom-sinking steering assembly, a sampling assembly, a sealing assembly, a transmission assembly, and a lifting assembly, the invention allows for the sequential opening of the inlets of each sampling box for liquid intake and sampling operations. This enables multiple sampling operations of flowing wastewater in a designated water area. The entire sampling device is simple, convenient, and easy to operate, facilitating daily portability. Furthermore, during sampling, the sampling frequency can be adaptively adjusted and controlled according to changes in water flow speed, improving sample representativeness and accuracy while enhancing detection and analysis efficiency and quality.

Description

Technical Field

[0001] This invention relates to the field of wastewater sampling technology, specifically a portable wastewater sampling device. Background Technology

[0002] In order to ensure sample representativeness, improve detection accuracy, analyze wastewater change trends, and meet different detection needs, wastewater sampling devices need to sample flowing wastewater multiple times during the sampling process.

[0003] In wastewater sampling devices, multiple sampling operations of flowing wastewater are problematic. Because the flow of wastewater itself is variable, while the sampling frequency of the actual wastewater sampling device is relatively fixed, it's impossible to adjust the sampling frequency synchronously according to the actual flow changes. When the wastewater flow rate is too fast and the sampling frequency is too slow, a large number of pollutants of different compositions may flow rapidly through the wastewater between sampling intervals, resulting in only a portion of the wastewater being collected. This fails to cover the various components and states of the wastewater in the flow, and therefore cannot fully reflect the true situation of the wastewater, making the samples unrepresentative. Conversely, when the flow rate is too slow and the sampling frequency is too fast, the composition and state of the wastewater are relatively stable in a short period when the flow rate is slow. An excessively fast sampling frequency leads to samples that are similar in composition and properties. A large number of duplicate samples not only fail to provide valuable information but also waste manpower, resources, and time. Therefore, we propose a portable wastewater sampling device. Summary of the Invention

[0004] The purpose of this invention is to provide a portable wastewater sampling device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a portable sewage sampling device, comprising a traction rope for pulling and deploying the sampling device and a collection cylinder for sampling operations, and further comprising:

[0006] A plug is installed at the lower end of the collection cylinder to seal the lower end of the collection cylinder. The plug is detachably connected to the lower end of the collection cylinder by means of threads. The plug is provided with a bottom-sinking and turning component to assist the entire sampling device in sinking to the bottom and adjusting its direction. Multiple sampling components for sampling are arranged inside the collection cylinder.

[0007] The sampling assembly includes a sampling box disposed inside a collection cylinder. A positioning component for assisting in the positioning of the sampling box is disposed between the inside of the collection cylinder and the sampling box. The sampling box has an inlet for sampling liquid inlet. A sealing component for sealing the inlet is disposed inside the sampling box. A linkage ring is sleeved on the outside of the collection cylinder. A transmission component for driving the sealing component is disposed on the linkage ring. A lifting component for driving the linkage ring to rise and fall is disposed on the outside of 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 speed of the detected water area is disposed on the installation box. One end of the traction rope is fixed to the upper end of the installation box.

[0008] Preferably, the sealing assembly includes a positioning groove formed inside the sampling box and communicating with the liquid inlet. The inner side of the positioning groove is connected to a sealing plate for sealing the liquid inlet via a telescopic assembly. A transmission rod is provided inside the liquid inlet. One end of the transmission rod is fixed to the sealing plate, and the other end of the transmission rod is located outside the sampling box.

[0009] Preferably, the transmission assembly includes a mounting bracket fixed to the inner side of the linkage ring, the lower end of the mounting bracket is provided with an inclined surface for abutting against the end of the transmission rod, and the linkage ring is provided with a connecting hole for sampling and conveying.

[0010] Preferably, the lifting assembly includes a lifting plate fixed to the outside of the linkage ring, a threaded sleeve fixed on the lifting plate, a threaded rod threadedly connected to the threaded sleeve, two sets of mounting rods slidably connected on the lifting plate, a mounting seat fixed to the outside of the collecting cylinder, and the threaded rod and mounting rods installed between the mounting seat and the mounting box.

[0011] Preferably, the control component includes a mounting shaft rotatably connected to the mounting box, a fan blade fixed on the mounting shaft, and multiple sets of flow holes for assisting liquid flow and transportation through the mounting box. Each set of flow holes is located on one side of the mounting shaft, and the direction of each set of flow holes is consistent with the liquid inlet of each set of sampling boxes. The mounting shaft and the threaded rod are connected and driven by a linkage component.

[0012] Preferably, the linkage component includes a connecting shaft rotatably connected to the mounting box, one end of the connecting shaft being fixed to one end of the threaded rod, and pulleys being fixed on the connecting shaft and the mounting shaft, with the two sets of pulleys being connected and driven by a belt.

[0013] Preferably, the telescopic assembly includes T-shaped rods slidably connected to the sealing plate, one end of each of the two sets of T-shaped rods is fixed to the inner side of the positioning groove, and a spring is sleeved on the outer side of the T-shaped rod, with both ends of the spring connected to the sealing plate and the end of the T-shaped rod, respectively.

[0014] Preferably, the positioning component includes two sets of arc-shaped grooves arranged symmetrically on the sampling box, and two sets of arc-shaped positioning plates that match the arc-shaped grooves are fixed inside the collection tube.

[0015] Preferably, the bottom-sinking steering assembly includes a support rod fixed to the lower end of the plug, the lower end of the support rod is rotatably connected to a gravity plate for assisting sinking, and two sets of pressure plates symmetrically arranged are fixed to the outside of the support rod.

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

[0017] This invention utilizes the coordinated operation of components such as a bottom-sinking steering assembly, a sampling assembly, a sealing assembly, a transmission assembly, and a lifting assembly to sequentially open the inlets of each sampling box and perform liquid inlet sampling operations. This allows for multiple sampling operations of flowing sewage in a designated water area. The entire sampling device is simple, convenient, and easy to operate, making it suitable for daily portable use. Furthermore, during the sampling process, the sampling frequency can be adaptively adjusted and controlled according to changes in water flow speed, improving sample representativeness and accuracy while enhancing detection and analysis efficiency and quality. Attached Figure Description

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

[0019] Figure 2 This is a schematic diagram of the bottom-sinking steering assembly of the present invention before adjusting the steering of the collection cylinder;

[0020] Figure 3 This is a schematic diagram of the state of the bottom-sinking steering component of the present invention after adjusting the steering of the collection cylinder;

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

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

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

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

[0025] Figure 8 This is a schematic diagram of the state of the transmission component of the present invention after it has been driven by the sealing component;

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

[0027] Figure 10 This is a schematic diagram of the lifting component structure of the present invention;

[0028] Figure 11 This is a schematic diagram of the control component and linkage component structure of the present invention;

[0029] Figure 12 This is a schematic diagram of the state of the control component of the present invention during the control transmission process;

[0030] Figure 13 This is a schematic diagram showing the state of the inlet and the direction of sewage flow after the support rod is adjusted according to the present invention.

[0031] In the diagram: 101-Traction rope; 102-Collection cylinder; 2-Plug; 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-Connecting 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-Flow hole; 1401-Connecting shaft; 1402-Pulley; 1403-Belt. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Example 1

[0034] Please see Figures 1-13 The portable wastewater sampling device shown in the figure includes a traction rope 101 for pulling and deploying the sampling device and a collection cylinder 102 for collecting materials. It also includes:

[0035] A plug 2 is provided at the lower end of the collection cylinder 102 to seal the lower end of the collection cylinder 102. The plug 2 is detachably connected to the lower end of the collection cylinder 102 by means of threads. The plug 2 is provided with a bottoming and turning component to assist the entire sampling device in sinking to the bottom and turning adjustment. Multiple 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 the positioning of the sampling box 401 is disposed between the inside of the collection cylinder 102 and the sampling box 401. The sampling box 401 has an inlet 402 for sampling liquid inlet. A blocking assembly for blocking the inlet 402 is disposed inside the sampling box 401. A linkage ring 8 is sleeved on the outside of the collection cylinder 102. A transmission assembly for driving the blocking assembly is disposed on the linkage ring 8. A lifting assembly for driving the linkage ring 8 to lift is disposed on the outside of 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 disposed on the installation box 12. One end of the traction rope 101 is fixed to the upper end of the installation box 12.

[0037] It should be noted that: through the cooperation of components such as the bottom-sinking steering component, sampling component, sealing component, transmission component, and lifting component, the inlet 402 of each sampling box 401 can be opened sequentially to perform liquid inlet sampling operations, completing multiple sewage sampling operations on the flowing sewage in the designated water area. The entire sampling device has a simple and convenient structure, is easy to operate, and is convenient for daily portable use. Moreover, during the sampling process, the sampling frequency can be adaptively adjusted and controlled according to the changes in water flow speed, improving the representativeness and accuracy of the samples while enhancing the efficiency and quality of detection and analysis.

[0038] Preferably, the sealing assembly includes a positioning groove 601 formed inside the sampling box 401 and communicating with the liquid inlet 402. The inner side of the positioning groove 601 is connected to a sealing plate 602 for sealing the liquid inlet 402 via a telescopic assembly. A transmission rod 603 is provided inside the liquid inlet 402. One end of the transmission rod 603 is fixed to the sealing 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: by means of the telescopic component, the sealing plate 602 abuts against the positioning groove 601, thereby sealing the liquid inlet 402 and preventing the overflow of collected sewage through the sealing effect.

[0040] Preferably, the transmission assembly includes a mounting bracket 901 fixed to the inner side of the linkage ring 8. The lower end of the mounting bracket 901 is provided with an inclined surface 902 for abutting against the end of the transmission rod 603 for transmission. The linkage ring 8 is provided with a connecting hole 903 for sampling and conveying.

[0041] It should be noted here that: through transmission, the lifting plate 1001 and the linkage ring 8 are subjected to force and move 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 mounting frame 901 abuts against the end of the transmission rod 603 on each set of sampling boxes 401 in sequence. During the process of the inclined surface 902 abutting against the end of the transmission rod 603, the sealing plate 602 at one end of the transmission rod 603 is pushed to slide out from the positioning groove 601, so that the liquid inlet 402 is no longer blocked. At this time, the sewage flowing outside is transported to the inside of the sampling box 401 for collection through the connecting hole 903 and the liquid inlet 402.

[0042] Preferably, the lifting assembly includes a lifting plate 1001 fixed to the outside of the linkage ring 8, a threaded sleeve 1002 fixed on the lifting plate 1001, a threaded rod 1003 threadedly connected to the threaded sleeve 1002, two sets of mounting rods 1004 slidably connected to the lifting plate 1001, a mounting base 1005 fixed to the outside of the collecting cylinder 102, and the threaded rod 1003 and the mounting rods 1004 installed between the mounting base 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 effect of the mounting rod 1004 on the lifting plate 1001 after being subjected to force, the lifting plate 1001 and the linkage ring 8 are subjected to force and move up and down on the outside of the collecting cylinder 102.

[0044] Preferably, the control component includes a mounting shaft 1301 rotatably connected to the mounting box 12, a fan blade 1302 fixed on the mounting shaft 1301, and multiple sets of flow holes 1303 for assisting liquid flow and transportation through the mounting box 12. Each set of flow holes 1303 is located on one side of the mounting shaft 1301, and the direction of each set of flow holes 1303 is consistent with the direction of the liquid inlet 402 of each set of sampling boxes 401. The mounting shaft 1301 and the threaded rod 1003 are connected and driven by a linkage component. 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, and pulleys 1402 are fixed on the connecting shaft 1401 and the mounting shaft 1301. The two sets of pulleys 1402 are connected and driven by a belt 1403.

[0045] It should be noted here that after the collection cylinder 102 is rotated, the flowing wastewater to be sampled passes through the mounting box 12 through the interconnection of the various sets of flow holes 1303 on the mounting box 12. During the passage, the mounting shaft 1301 rotates due to the abutment and transmission between the wastewater and the fan blades 1302 inside the mounting box 12. During the rotation of the mounting shaft 1301, the connecting shaft 1401 and the threaded rod 1003 are driven to rotate through the connection and transmission between the pulley 1402 and the two sets of belts 1403.

[0046] It is worth noting that the arrangement of each set of flow holes 1303 on one side of the mounting shaft 1301 allows the flowing sewage to pass through one side of the mounting shaft 1301, facilitating more efficient rotation drive operation.

[0047] Preferably, the telescopic assembly includes a T-shaped rod 701 slidably connected to the sealing plate 602. One end of the two sets of T-shaped rods 701 is 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 sealing plate 602 and the end of the T-shaped rod 701.

[0048] It should be noted here that the T-shaped rod 701 assists in the extension and sliding of the sealing plate 602 after being subjected to force, and the spring 702 facilitates the reset movement of the sealing plate 602 after movement.

[0049] Preferably, the positioning component includes two sets of arc-shaped grooves 501 arranged symmetrically on the sampling box 401, and two sets of arc-shaped positioning plates 502 that match the arc-shaped grooves 501 are fixed inside the collection cylinder 102.

[0050] It should be noted here that the sampling box 401 is positioned after being placed in the arc-shaped groove 501 and the arc-shaped positioning plate 502.

[0051] Preferably, the bottom-sinking steering 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 plate 302 for assisting sinking, and two sets of pressure plates 303 symmetrically arranged are fixed to the outside of the support rod 301.

[0052] It should be noted that when the entire sampling device is placed into the flowing wastewater area to be sampled, the gravity traction of the gravity plate 302 pulls the collection cylinder 102 down into the wastewater area until the gravity plate 302 contacts the bottom of the area. The collection cylinder 102 then stops descending. At this point, the flow of wastewater inside the area being sampled, combined with the interaction between the flow of wastewater and the two pressure plates 303 on the support rod 301, causes the support rod 301 to rotate until the two pressure plates 303 are parallel to the direction of the water flow. The adaptive rotation of the support rod 301 according to the water flow direction causes the plug 2 and the collection cylinder 102 to rotate synchronously. This rotation of the collection cylinder 102 ensures that the inlets 402 of each sampling box 401 and the flow holes 1303 on the mounting box 12 are aligned with the direction of the wastewater flow, facilitating more efficient wastewater sampling and collection and wastewater flow operations.

[0053] This solution includes a portable wastewater sampling device, comprising the following steps:

[0054] During the sampling operation of the sampling device for multiple sampling operations of flowing sewage, multiple sets of sampling boxes 401 are pushed into the inside of the collection cylinder 102 in sequence through the positioning action of the arc groove 501 and the arc positioning plate 502. After each set of sampling boxes 401 is placed, the plug 2 is connected to the lower end of the collection cylinder 102 by means of threads to seal the pushed-in sampling boxes 401.

[0055] After each sampling box 401 is inserted into the collection cylinder 102 and the collection cylinder 102 is sealed, the entire sampling device is inserted into the flowing wastewater area to be sampled via the traction rope 101. During insertion, the collection cylinder 102 is pulled downwards by the gravity traction of the gravity plate 302 until the gravity plate 302 contacts the bottom of the wastewater area. The collection cylinder 102 then stops descending. At this point, the flowing wastewater inside the sampling area and the contact action between the pressure plates 303 on the support rod 301 drive the support rod 301 to rotate until the two pressure plates 303 on the support rod 301 are parallel to the direction of the water flow (see [reference]). Figure 2 Convert to Figure 3In the current state, the support rod 301 rotates adaptively according to the water flow direction, causing the plug 2 and the collection cylinder 102 to rotate synchronously. The rotation of the collection cylinder 102 ensures that the inlets 402 of each sampling box 401 and the flow holes 1303 on the mounting box 12 are aligned with the sewage flow direction, facilitating more efficient sewage sampling and collection and sewage flow operations. After the collection cylinder 102 is adjusted, the flowing sewage to be sampled passes through the mounting box 12 through the interconnected flow holes 1303. During this passage, the mounting shaft 1301 rotates due to the interaction between the sewage and the fan blades 1302 inside the mounting box 12. During the rotation of the mounting shaft 1301, the pulley 140... 2. The connection and transmission between the two sets of belts 1403 drives the connecting shaft 1401 and the threaded rod 1003 to rotate. During the rotation of the threaded rod 1003, the mutual meshing transmission between the threaded rod 1003 and the threaded sleeve 1002, and the guiding effect of the mounting rod 1004 on the lifting plate 1001 after being subjected to force, cause the lifting plate 1001 and the linkage ring 8 to move from top to bottom on the outside of the collection cylinder 102 under force. During the movement of the linkage ring 8, the inclined surface 902 on the mounting bracket 901 abuts against the end of the transmission rod 603 on each set of sampling boxes 401 in sequence. During the process of the inclined surface 902 abutting against the end of the transmission rod 603, the sealing 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 (see Figure 8 At this time, the externally flowing sewage is transported through the connecting hole 903 and the inlet 402 to the inside of the sampling box 401 for collection (see...). Figure 8 Therefore, during the downward movement of the linkage ring 8, the inlet 402 of each sampling box 401 can be opened in sequence to carry out the liquid inlet sampling operation, and the sewage sampling operation of the sewage flowing in the designated water area can be completed in multiple times. The entire sampling device has a simple and convenient structure, is easy to operate, and is convenient for daily portable use.

[0056] Furthermore, during the multiple sampling operations of the wastewater sampling device on flowing wastewater, as the wastewater flow rate changes, the descent speed of the linkage ring 8 varies with the wastewater flow. This is achieved through the interconnection of the wastewater through the various flow holes 1303 on the mounting box 12, the resistance between the flowing wastewater and the fan blades 1302, and the connection and transmission of the linkage components. The faster the wastewater flow, the faster the linkage ring 8 descends, accelerating the opening speed of the inlet ports 402 on each sampling box 401, thus achieving high-frequency wastewater collection operations. Conversely, the slower the wastewater flow, the slower the linkage ring 8 descends, reducing the opening speed of the inlet ports 402 on each sampling box 401, thus achieving low-frequency wastewater collection operations. This allows the sampling frequency to be adaptively adjusted and controlled according to changes in the water flow rate during multiple wastewater sampling operations, improving sample representativeness and accuracy while enhancing detection and analysis efficiency and quality.

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

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

Claims

1. A portable wastewater sampling device, comprising: A traction rope (101) for pulling and deploying the sampling device and a collection cylinder (102) for material collection operations. Its characteristic is that it further includes: A plug (2) is provided at the lower end of the collection cylinder (102) to seal the lower end of the collection cylinder (102). The plug (2) is detachably connected to the lower end of the collection cylinder (102) by means of threads. The plug (2) is provided with a bottoming and turning component to assist the entire sampling device in sinking to the bottom and turning adjustment. The inside of the collection cylinder (102) is arranged with multiple sampling components for sampling. The sampling assembly includes a sampling box (401) disposed inside the collection cylinder (102). A positioning component for assisting the positioning of the sampling box (401) is disposed between the inside of the collection cylinder (102) and the sampling box (401). The sampling box (401) is provided with an inlet (402) for sampling and liquid inlet. A sealing component for sealing the inlet (402) is disposed inside the sampling box (401). A linkage ring (8) is sleeved on the outside of the collection cylinder (102). A transmission component for driving the sealing component is disposed on the linkage ring (8). A lifting component for driving the linkage ring (8) is disposed on the outside of the collection cylinder (102). An installation box (12) is installed at the upper end of the collection cylinder (102). A control component for controlling the lifting speed according to the water flow speed of the detected water area is disposed on the installation box (12). One end of the traction rope (101) is fixed to the upper end of the installation box (12). The transmission assembly includes a mounting bracket (901) fixed inside the linkage ring (8), the lower end of the mounting bracket (901) is provided with an inclined surface (902), and the linkage ring (8) is provided with a connecting hole (903) for sampling and conveying. The control component includes a mounting shaft (1301) rotatably connected to the mounting box (12), a fan blade (1302) fixed on the mounting shaft (1301), and multiple sets of flow holes (1303) for assisting liquid flow and transportation are opened through the mounting box (12). Each set of flow holes (1303) is located on one side of the mounting shaft (1301), and the direction of each set of flow holes (1303) is consistent with the liquid inlet (402) of each set of sampling boxes (401).

2. The portable wastewater sampling device according to claim 1, characterized in that: The sealing assembly includes a positioning groove (601) located inside the sampling box (401) and communicating with the liquid inlet (402). The inner side of the positioning groove (601) is connected to a sealing plate (602) for sealing the liquid inlet (402) via a telescopic assembly. A transmission rod (603) is provided inside the liquid inlet (402). One end of the transmission rod (603) is fixed to the sealing plate (602), and the other end of the transmission rod (603) is located outside the sampling box (401).

3. The portable wastewater sampling device according to claim 2, characterized in that: The lifting assembly includes a lifting plate (1001) fixed to the outside of the linkage ring (8), a threaded sleeve (1002) fixed on the lifting plate (1001), a threaded rod (1003) threadedly engaged on the threaded sleeve (1002), two sets of mounting rods (1004) slidably connected on the lifting plate (1001), a mounting seat (1005) fixed to the outside of the collecting cylinder (102), the threaded rod (1003) and the mounting rod (1004) installed between the mounting seat (1005) and the mounting box (12), and the mounting shaft (1301) and the threaded rod (1003) are connected and driven by the linkage assembly.

4. A portable wastewater sampling device according to claim 3, 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). Pulleys (1402) are fixed on the connecting shaft (1401) and the mounting shaft (1301). The two sets of pulleys (1402) are connected and driven by a belt (1403).

5. A portable wastewater sampling device according to claim 2, characterized in that: The telescopic assembly includes a T-shaped rod (701) slidably connected to the sealing plate (602). One end of the two sets of T-shaped rods (701) is 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 ends of the sealing plate (602) and the T-shaped rod (701).

6. A portable wastewater sampling device according to claim 1, characterized in that: The positioning component includes two sets of arc-shaped grooves (501) arranged symmetrically on the sampling box (401), and two sets of arc-shaped positioning plates (502) that match the arc-shaped grooves (501) are fixed inside the collection tube (102).

7. A portable wastewater sampling device according to claim 1, characterized in that: The bottom-sinking steering 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 plate (302) for assisting sinking. Two sets of pressure plates (303) are fixed to the outside of the support rod (301) and arranged symmetrically.

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