Water quality sampling equipment for sewage detection

Abstract

The invention relates to the field of sewage detection sampling, in particular to water quality sampling equipment for sewage detection, which comprises a main body shell, an air bag arranged on the main body shell, a collection unit arranged on the main body shell, a retractable unit arranged on the main body shell and a traction ring arranged on the main body shell, the lifting assembly drives the retracting and releasing assembly to rotate around the pipe winding column, and meanwhile the rotating retracting and releasing assembly is driven by the rotating assembly to vertically move back and forth in the direction perpendicular to the liquid level of the sewage purification pool, so that stable retracting and releasing of the water drawing pipe on the pipe winding column are achieved; the water storage cavity is matched to sample sewage at all depths of the sewage purification tank, then a worker uses a rope to connect a traction ring to drive the device to move around on the sewage purification tank, sewage collection work of all positions of the sewage purification tank is achieved, and all collected sewage enters the water storage cavity through a water drawing pipe to be mixed; and the final sample can reflect the overall condition of the sewage purification tank more accurately.

Description

Technical Field

[0001] The invention relates to the field of sewage detection and sampling, in particular to a water quality sampling device for sewage detection. Background Art

[0002] During the sewage treatment process, wastewater from a sewage purification tank must be tested before discharge to ensure it meets discharge standards. Existing technology typically involves sampling and testing wastewater at the tank's inlet and outlet, using sampling points. However, due to varying water flow rates, mixing levels, and biodegradation levels in different areas of the tank, pollutants are unevenly distributed within the tank. This sampling method can lead to errors in the overall assessment of the tank's wastewater. Summary of the Invention

[0003] The present invention is proposed in view of the problem in the above or existing technologies that due to the different water flow speeds, mixing degrees and biodegradation degrees in different areas of the sewage purification tank, the pollutants in the tank are unevenly distributed, which may lead to errors in the overall assessment of the sewage in the purification tank.

[0004] Therefore, an object of the present invention is to provide a water quality sampling device for sewage detection.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: including a main body shell, an air bag arranged on the main body shell, a collection unit arranged on the main body shell, a retractable unit arranged on the main body shell, and a traction ring arranged on the main body shell; the collection unit includes a water storage chamber arranged on the main body shell, a pipe winding column arranged on the main body shell, and a water-drawing assembly arranged on the pipe winding column and connected to the water storage chamber through a water pump; the retractable unit includes a rotating assembly arranged on the main body shell, a lifting assembly arranged on the rotating assembly, and a retractable assembly arranged on the lifting assembly; the water-drawing assembly is driven to be retracted and extended in the water by the rotating assembly and the lifting assembly to collect sewage at various depths of the sewage purification tank, and then cooperated with the retractable assembly to improve the stability of the water-drawing assembly when it is retracted and extended.

[0006] As a preferred solution of the water quality sampling device for sewage detection of the present invention, a movable cavity is provided on the main shell to cooperate with the collection unit and the retractable unit.

[0007] As a preferred solution of the water quality sampling equipment for sewage detection of the present invention, the water drawing component includes a water drawing pipe wound on a pipe winding column, a support ring arranged on the water drawing pipe, a water drawing head arranged at one water drawing end of the water drawing pipe, and a gravity block arranged on the water drawing head.

[0008] As a preferred solution of the water quality sampling equipment for sewage detection of the present invention, wherein: a connecting port 2 is provided on the winding pipe column to be connected to the water drawing pipe, and a connecting port 1 is provided on the movable cavity to be connected to the connecting port 2; the cross-sectional area of ​​the winding pipe column gradually decreases from top to bottom, and a winding pipe groove is provided on the winding pipe column to match the water drawing pipe.

[0009] As a preferred solution of the water quality sampling equipment for sewage detection of the present invention, wherein: a retractable opening is provided on the main shell to cooperate with the gravity block; a through hole is provided on the abutment block, and the diameter of the through hole is smaller than the diameter of the gravity block; balls are provided at the upper and lower ends of the through hole to cooperate with the retraction and extension of the water drawing pipe.

[0010] As a preferred solution of the water quality sampling equipment for sewage detection of the present invention, the rotating assembly includes a lifting ring arranged on the movable cavity, a sliding block arranged on the lifting ring, and an electric push rod arranged on the lifting ring; a sliding groove that cooperates with the sliding block is arranged on the movable cavity.

[0011] As a preferred solution of the water quality sampling equipment for sewage detection of the present invention, the lifting assembly includes a rotating ring arranged on the lifting ring, a connecting block arranged on the rotating ring, and a rotating member arranged on the rotating ring.

[0012] As a preferred solution of the water quality sampling equipment for sewage detection of the present invention, there are multiple groups of connecting blocks on the rotating ring, one group of connecting blocks is provided with a retractable assembly; a fixed block is provided on the connecting block, and an annular groove matching the fixed block is provided on the lifting ring.

[0013] As a preferred solution of the water quality sampling equipment for sewage detection of the present invention, the rotating part includes a connecting shaft arranged on a rotating ring, and a rotating gear arranged on the connecting shaft. There are multiple groups of connecting shafts on the rotating ring, one group of which is connected to the driving end of the motor; a rotating groove is provided on the lifting ring, and a connecting tooth groove is provided on the rotating groove to match the rotating gear.

[0014] As a preferred solution of the water quality sampling equipment for sewage detection of the present invention, wherein: the retractable assembly includes a fixed sleeve arranged on the connecting block, a movable block arranged on the fixed sleeve, a compression spring arranged between the fixed sleeve and the movable block, a limit block 1 arranged on the movable block, and a limit block 2 arranged on the limit block 1; under normal conditions, the water drawing pipe contacts the side of the limit block 1 and the top of the limit block 2.

[0015] The beneficial effects of the water quality sampling equipment for sewage detection of the present invention are as follows: the present invention drives the retractable assembly to rotate around the pipe column through the lifting assembly, and then drives the rotating retractable assembly to move up and down in the direction vertical to the liquid surface of the sewage purification tank through the rotating assembly, so that the water drawing pipe can be stably retracted and extended on the pipe column, and the sewage at different depths in the sewage purification tank is sampled in conjunction with the water storage chamber. Then, the staff uses a rope to connect the traction ring to drive the device to move around the sewage purification tank, so as to realize the sewage collection work at various positions in the sewage purification tank. All the collected sewage enters the water storage chamber through the water drawing pipe for mixing, so that the final sample can more accurately reflect the overall situation of the sewage in the sewage purification tank, thereby judging whether the sewage meets the discharge standard. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a structural diagram of the water quality sampling equipment used for sewage testing in a non-working state

[0018] Figure 2 This is a structural diagram of the water quality sampling equipment used for sewage testing in working condition.

[0019] Figure 3 Schematic diagram of the cross-sectional structure of the retractable unit of the water quality sampling equipment used for sewage testing

[0020] Figure 4 This is a schematic diagram of the structure of a pipe-wound column of a water quality sampling device used for sewage testing.

[0021] Figure 5 This is a schematic diagram of the cross-sectional structure of the main shell of a water quality sampling device used for sewage testing.

[0022] Figure 6 This is a schematic diagram of the structure of the abutment block of a water quality sampling device used for sewage testing.

[0023] Figure 7 This is a schematic diagram of the structure of the rotating ring of the water quality sampling equipment used for sewage testing.

[0024] Figure 8 Water sampling equipment for sewage testing Figure 7 A magnified view of the structure at center A.

[0025] Figure 9This is a schematic diagram of the cross-sectional structure of a fixed sleeve of a water quality sampling device used for sewage testing.

[0026] In the figure: 1. Main body shell; 11. Active cavity; 111. Sliding groove; 112. Connection port 1; 12. Retractable port; 13. Abutment block; 131. Through hole; 132. Ball; 2. Air bag; 3. Collection unit; 31. Water storage cavity; 32. Pipe winding column; 321. Connection port 2; 322. Pipe winding groove; 33. Water drawing assembly; 331. Water drawing pipe; 332. Support ring; 333. Water drawing head; 334. Gravity block; 4. Retractable unit; 41. Rotation assembly; 411. Lifting Lowering ring; 4111, rotating groove; 4112, connecting tooth groove; 4113, annular groove; 412, sliding block; 413, electric push rod; 42, lifting assembly; 421, rotating ring; 422, connecting block; 4221, fixed block; 423, rotating part; 4231, connecting shaft; 4232, rotating gear; 43, retracting and extending assembly; 431, fixed sleeve; 432, movable block; 433, compression spring; 434, limit block 1; 435, limit block 2; 5, traction ring. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0028] Example 1, reference Figure 1-Figure 3 , which is the first embodiment of the present invention, provides a water quality sampling device for sewage detection, which includes a main body shell 1 for supporting and protecting the entire device, an air bag 2 provided on the main body shell 1, which is filled with a large amount of air and is used to drive the device to float on the water surface of the sewage purification tank, a collection unit 3 provided on the main body shell 1, which is used to collect and mix sewage samples, a retractable unit 4 provided on the main body shell 1, which is used to drive the device to sample sewage at different depths in the sewage purification tank, and a traction ring 5 provided on the main body shell 1, which is connected to a rope for a staff to drive the device back and forth on the sewage purification tank, and cooperate with the collection unit 3 and the retractable unit 4 to collect samples at different positions and depths in the sewage purification tank, so that the final sample detection result is more accurate;

[0029] The collection unit 3 includes a water storage chamber 31 provided on the main housing 1 for storing collected sewage. A small water pump is installed on the water storage chamber 31 for generating suction. A winding column 32 is provided on the main housing 1, and a water drawing assembly 33 is provided on the winding column 32 and connected to the water storage chamber 31 via the water pump. The winding column 32 is used to retract the water drawing assembly 33, facilitating its retraction and extension for collecting samples at different depths. The water drawing assembly 33 is used to cooperate with the water storage chamber 31 to collect samples.

[0030] The retracting and unfolding unit 4 includes a rotating assembly 41 provided on the main housing 1 for moving up and down, a lifting assembly 42 provided on the rotating assembly 41 for rotating, and a retracting and unfolding assembly 43 provided on the lifting assembly 42 for cooperating with the rotating assembly 41 and the lifting assembly 42 to rotate and simultaneously move up and down, thereby driving the water drawing assembly 33 to be stably retracted and unfolded on the winding column 32, so as to facilitate comprehensive sample collection;

[0031] The rotating assembly 41 and the lifting assembly 42 drive the water-drawing assembly 33 to be retracted and extended in the water to collect sewage at various depths of the sewage purification pool, and the retracting assembly 43 is then used to improve the stability of the water-drawing assembly 33 during retraction and extension.

[0032] Among them, an active cavity 11 is provided on the main shell 1 to cooperate with the collection unit 3 and the retractable unit 4. The collection unit 3 and the retractable unit 4 move in the active cavity 11, and the collection unit 3 and the retractable unit 4 are protected and supported by the main shell 1 to prevent damage.

[0033] In summary, when it is necessary to inspect the sewage in the sewage purification pool, the staff connects the equipment to the rope through the traction ring 5, fills the air bag 2 with air, and places the equipment in the sewage purification pool. At this time, the equipment floats on the water surface through the air bag 2. At this time, the lifting component 42 and the rotating component 41 are started to drive the retracting component 43 to rotate and move up and down at the same time. At this time, the retracting component 43 releases the water-drawing component 33 from the winding pipe column 32 by rotation. At this time, the water-drawing component 33 is released and slowly enters the deep part of the sewage purification pool. At this time, with the release of the water-drawing component 33, the center of gravity of the entire equipment drops. At this time, the staff can drive the equipment in the sewage through the rope. The water pump is started at the same time to suck the sample into the water storage chamber 31 through the water-drawing component 33. After a period of time, it is flipped over by the lifting component 42, and the water-drawing component 33 is rewound on the winding column 32 through the retracting component 43. At this time, the water-drawing end of the water-drawing component 33 moves upward, and cooperates with the water pump to collect the sample on the upper layer. Through such operation, samples from various areas and deeper layers in the sewage purification pool can be fully collected. At this time, the collected samples are gathered in the water storage chamber 31 for mixing, so that the final tested sample is closer to the actual status of the sewage purification pool treatment, and the sewage purification pool is more accurately evaluated through the test results.

[0034] Example 2, reference Figure 1-Figure 7, which is the second embodiment of the present invention, is different from the previous embodiment in that a specific shape of the winding column 32 is provided. Compared with Example 1, the water-drawing assembly 33 further includes a water-drawing pipe 331 wound around the pipe column 32, which is used to play a connecting role and cooperate with the water pump to collect sewage samples; a support ring 332 arranged on the water-drawing pipe 331, which plays a supporting role to prevent the water-drawing pipe 331 from being squeezed and flattened during the retraction and extension process, resulting in the inability to collect normal samples; at the same time, it replaces the water-drawing pipe 331 to contact with other components, reducing the wear of the water-drawing pipe 331; a water-drawing head 333 arranged at one water-drawing end of the water-drawing pipe 331, which is used to cooperate with the water-drawing pipe 331 to collect samples; and a gravity block 334 arranged on the water-drawing head 333, which is used to increase the counterweight of the equipment and keep the part of the water-drawing pipe 331 leaving the pipe column 32 in a straightened state. At the same time, when the water-drawing pipe 331 is released, as the water-drawing pipe 331 sinks, the center of gravity of the equipment is lowered, preventing the water-drawing head 333 from being carried to other positions by the water flow, thereby increasing the stability when collecting samples.

[0035] The winding column 32 is provided with a second connection port 321 that communicates with the water drawing pipe 331 , and the movable chamber 11 is provided with a first connection port 112 that communicates with the second connection port 321 . This arrangement allows the sample to smoothly pass through the water drawing pipe 331 into the water storage chamber 31 for storage.

[0036] The cross-sectional area of ​​the winding pipe column 32 gradually decreases from top to bottom. This arrangement reduces the friction between the support ring 332 and the winding pipe column 32 when the water-drawing pipe 331 is released, making the release of the water-drawing pipe 331 smoother. A winding pipe groove 322 is provided on the winding pipe column 32 to match the water-drawing pipe 331. The winding pipe groove 322 increases the contact surface between the winding pipe column 32 and the support ring 332, so that the water-drawing pipe 331 is wound more tightly on the winding pipe column 32 when it is retracted, thereby increasing the support of the winding pipe column 32 for the water-drawing pipe 331 and reducing the pressure on the retractable assembly 43.

[0037] The main housing 1 is provided with a retractable opening 12 to cooperate with the gravity block 334 and to be used for retracting and extending the gravity block 334;

[0038] The abutment block 13 is provided with a through hole 131 for the back-and-forth movement of the water-drawing pipe 331 when it is retracted. The diameter of the through hole 131 is smaller than the diameter of the gravity block 334 and is used to abut against the gravity block 334 when the gravity block 334 is retracted to prevent the gravity block 334 from excessive movement.

[0039] Ball bearings 132 are provided at the upper and lower ends of the through hole 131 to cooperate with the retraction and extension of the water-drawing tube 331. When the water-drawing tube 331 is retracted and extended, the water-drawing tube 331 and the support ring 332 are in contact with the ball bearings 132, and rolling friction is used instead of sliding friction to reduce the friction between the water-drawing tube 331 and the support ring 332.

[0040] The rest of the structure is the same as that of Example 1.

[0041] In summary, when the device is placed on the liquid surface of the sewage purification pool, the lifting assembly 42 and the rotating assembly 41 are started at the same time, driving the retractable assembly 43 to rotate counterclockwise around the winding column 32 while moving up and down. At this time, the movement of the retractable assembly 43 drives the water-drawing pipe 331 to be released from the winding column 32. At this time, the gravity block 334 drives the water-drawing head 333 to go deeper into the sewage purification pool. At this time, the water pump cylinder sucks the sample from the water-drawing head 333 and transports it into the water storage chamber 31 through the water-drawing pipe 331. After a period of time, At this time, the lifting component 42 is used to control the retracting and extending component 43 to reverse. At this time, the retracting and extending component 43 rotates clockwise, driving the water-drawing pipe 331 to wrap around the pipe column 32. At this time, the water-drawing pipe 331 drives the gravity block 334 to retract until the gravity block 334 completely enters the retracting and extending port 12. At this time, the water-drawing pipe 331 is completely retracted, and the water-drawing head 333 is driven up and down by the retraction and extension of the water-drawing pipe 331. At this time, the staff cooperates with the rope to drive the equipment to move upstream on the sewage purification pool to realize the comprehensive collection of samples in the sewage purification pool.

[0042] Example 3, reference Figures 1-9 This is the second embodiment of the present invention, which differs from the previous embodiment in that it provides a specific structure of the retractable unit 4 in a water quality sampling device for sewage testing. Compared to the second embodiment, the rotating assembly 41 further includes a lifting ring 411 disposed on the movable chamber 11 to provide support, a sliding block 412 disposed on the lifting ring 411 to limit movement, and an electric push rod 413 disposed on the lifting ring 411 to drive the lifting ring 411 to move up and down.

[0043] The movable cavity 11 is provided with a sliding groove 111 that cooperates with the sliding block 412. The sliding block 412 moves up and down in the sliding groove 111 through the electric push rod 413, guiding and limiting the movement of the lifting ring 411, making the movement of the lifting ring 411 more stable.

[0044] Among them, the lifting assembly 42 includes a rotating ring 421 arranged on the lifting ring 411, which plays a connecting role, a connecting block 422 arranged on the rotating ring 421, which is used to connect the rotating ring 421 with the lifting ring 411, and a rotating member 423 arranged on the rotating ring 421, which is used to drive the rotating ring 421 to rotate on the lifting ring 411.

[0045] There are multiple groups of connecting blocks 422 on the rotating ring 421. One group of connecting blocks 422 is provided with a retractable assembly 43 for retracting and extending the water pipe 331 in conjunction with the rotation of the rotating ring 421.

[0046] The connecting block 422 is provided with a fixing block 4221 , and the lifting ring 411 is provided with an annular groove 4113 that matches the fixing block 4221 , which is used to connect the rotating ring 421 and the lifting ring 411 without affecting the rotation of the rotating ring 421 on the lifting ring 411 .

[0047] The rotating member 423 includes a connecting shaft 4231 provided on the rotating ring 421, which serves as a connection and support, and a rotating gear 4232 provided on the connecting shaft 4231 for rotation. Multiple groups of connecting shafts 4231 are provided on the rotating ring 421, one of which is connected to the driving end of the motor. The motor drives the rotating gear 4232 to rotate through the connecting shaft 4231.

[0048] The lifting ring 411 is provided with a rotation groove 4111 , and the rotation groove 4111 is provided with a connecting tooth groove 4112 that matches the rotating gear 4232 . When the rotating gear 4232 rotates, the rotating ring 421 is driven to rotate on the rotation groove 4111 through the connecting tooth groove 4112 .

[0049] The retractable assembly 43 includes a fixed sleeve 431 provided on the connecting block 422 for fixing and supporting the device; a movable block 432 provided on the fixed sleeve 431 for moving back and forth and for connecting the device; a compression spring 433 provided between the fixed sleeve 431 and the movable block 432 for driving the retractable assembly 43 to be in close contact with the water-drawing pipe 331 and to change the length of the water-drawing pipe 331 in coordination with the retraction and extension; a first limiting block 434 provided on the movable block 432; and a second limiting block 435 provided on the first limiting block 434. The first limiting block 434 and the second limiting block 435 cooperate to move the water-drawing pipe 331 and cooperate with the connecting block 422 to drive the retractable assembly 43 to rotate as a whole to retract and extend the water-drawing pipe 331.

[0050] Under normal conditions, the water-drawing pipe 331 contacts the side of the limit block 1 434 and the top of the limit block 2 435. Through this arrangement, the limit block 1 434 and the limit block 2 435 maintain full contact with the water-drawing pipe 331, preventing the water-drawing pipe 331 from detaching. The rotation of the retractable assembly 43 can achieve precise control of the retractable state of the water-drawing pipe 331 and maintain stable operation of the device.

[0051] The rest of the structure is the same as that of Example 2.

[0052] In summary, when it is necessary to collect sewage samples from deep inside the sewage purification pool, the motor and the electric push rod 413 are started at the same time. At this time, the motor drives the rotating ring 421 to rotate on the rotating groove 4111 by rotating the gear 4232 and cooperating with the connecting tooth groove 4112. At the same time, the electric push rod 413 drives the lifting ring 411 to move up and down. At this time, the fixed sleeve 431 cooperates with the connecting block 422 to rotate counterclockwise while also moving up and down with the lifting ring 411. At this time, the limit block 1 434 and the limit block 2 435 move the water drawing pipe 331, driving the water drawing pipe 331 to be released. At this time, the compression spring 433 cooperates with the limit block 1 434 and the limit block 2 435 to generate a force when they abut against the water drawing pipe 331. Release, keep the limit block 1 434 and the limit block 2 435 in contact with the water drawing pipe 331. When it is necessary to collect sewage samples at other depths in the sewage purification pool, the motor is controlled to reverse. At this time, the fixed sleeve 431 cooperates with the connecting block 422 to rotate clockwise. At this time, the limit block 1 434 and the limit block 2 435 push the water drawing pipe 331 around the winding pipe column 32, driving the water drawing pipe 331 to be wound around the winding pipe column 32. At this time, the compression spring 433 cooperates with the limit block 1 434 and the limit block 2 435 to compress the force generated when the water drawing pipe 331 abuts, maintains contact and support for the water drawing pipe 331, and when the gravity block 334 completely enters the retractable opening 12, the water drawing pipe 331 is completely retracted.

[0053] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A water quality sampling device for sewage detection, characterized by: It comprises a main body shell (1), an air bag (2) arranged on the main body shell (1), a collection unit (3) arranged on the main body shell (1), a retracting unit (4) arranged on the main body shell (1), and a traction ring (5) arranged on the main body shell (1); The collection unit (3) comprises a water storage chamber (31) provided on the main housing (1), a pipe winding column (32) provided on the main housing (1), and a water drawing component (33) provided on the pipe winding column (32) and connected to the water storage chamber (31) via a water pump; The retractable unit (4) comprises a rotating assembly (41) arranged on the main body shell (1), a lifting assembly (42) arranged on the rotating assembly (41), and a retractable assembly (43) arranged on the lifting assembly (42); The water-drawing assembly (33) is driven to be retracted and extended in the water by the rotating assembly (41) and the lifting assembly (42), so as to collect sewage at various depths of the sewage purification pool, and the stability of the water-drawing assembly (33) during retraction and extension is improved by cooperating with the retracting and extending assembly (43).

2. The water quality sampling device for sewage detection according to claim 1, characterized in that: The main body shell (1) is provided with an active cavity (11) to cooperate with the collecting unit (3) and the retracting unit (4).

3. The water quality sampling device for sewage testing according to claim 2, characterized in that: The water drawing assembly (33) comprises a water drawing pipe (331) wound around a pipe winding column (32), a support ring (332) arranged on the water drawing pipe (331), a water drawing head (333) arranged at a water drawing end of the water drawing pipe (331), and a weight block (334) arranged on the water drawing head (333).

4. The water quality sampling device for sewage testing according to claim 3, characterized in that: The winding pipe column (32) is provided with a second connection port (321) communicating with the water drawing pipe (331), and the movable chamber (11) is provided with a first connection port (112) communicating with the second connection port (321); The cross-sectional area of ​​the pipe winding column (32) gradually decreases from top to bottom, and a pipe winding groove (322) is provided on the pipe winding column (32) to match the water drawing pipe (331).

5. The water quality sampling device for sewage detection according to claim 4, characterized in that: The main body shell (1) is provided with a retractable opening (12) to cooperate with the gravity block (334); The abutment block (13) is provided with a through hole (131), and the diameter of the through hole (131) is smaller than the diameter of the gravity block (334); Balls (132) are provided at the upper and lower ends of the through hole (131) to cooperate with the retraction and extension of the water drawing pipe (331).

6. The water quality sampling device for sewage testing according to claim 5, characterized in that: The rotating assembly (41) includes a lifting ring (411) arranged on the movable chamber (11), a sliding block (412) arranged on the lifting ring (411), and an electric push rod (413) arranged on the lifting ring (411); The movable cavity (11) is provided with a sliding groove (111) that matches the sliding block (412).

7. The water quality sampling device for sewage detection according to claim 6, characterized in that: The lifting assembly (42) comprises a rotating ring (421) arranged on the lifting ring (411), a connecting block (422) arranged on the rotating ring (421), and a rotating member (423) arranged on the rotating ring (421).

8. The water quality sampling device for sewage testing according to claim 7, characterized in that: A plurality of connection blocks (422) are provided on the rotating ring (421), wherein a retractable assembly (43) is provided on one group of the connection blocks (422); A fixing block (4221) is provided on the connecting block (422), and an annular groove (4113) matching the fixing block (4221) is provided on the lifting ring (411).

9. The water quality sampling device for sewage testing according to claim 8, characterized in that: The rotating member (423) includes a connecting shaft (4231) provided on the rotating ring (421), and a rotating gear (4232) provided on the connecting shaft (4231). Multiple groups of connecting shafts (4231) are provided on the rotating ring (421), and one group of connecting shafts (4231) is connected to the driving end of the motor. The lifting ring (411) is provided with a rotation groove (4111), and the rotation groove (4111) is provided with a connecting tooth groove (4112) that matches the rotation gear (4232).

10. The water quality sampling device for sewage testing according to claim 9, characterized in that: The retractable assembly (43) includes a fixed sleeve (431) provided on the connecting block (422), a movable block (432) provided on the fixed sleeve (431), a compression spring (433) provided between the fixed sleeve (431) and the movable block (432), a first limiting block (434) provided on the movable block (432), and a second limiting block (435) provided on the first limiting block (434). Under normal conditions, the water drawing pipe (331) contacts the side of the first limiting block (434) and the top of the second limiting block (435).

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