A sampling device based on preliminary filtration for sewage treatment

Abstract

The invention discloses a sampling device capable of preliminary filtration for sewage treatment, which relates to the technical field of sewage treatment, including a pull rod, the bottom of which is connected to a treatment cylinder via a connecting plate, the inner thread of the treatment cylinder is connected to a closing cover, a liquid inlet and a liquid outlet are provided on one side of the treatment cylinder, a driving mechanism and a scraper assembly are installed inside the treatment cylinder, and a collecting assembly is also installed inside the treatment cylinder, a micro motor is started to drive the rotating shaft to rotate, and the filter plate is driven to perform circular motion, the sewage is stirred when the filter plate rotates, and the rapid attachment of larger particles and flocs is promoted, when the scraper plate descends with the contact plate, impurities on its surface are scraped off by the edge of the abutment plate, and at the same time, the bevel contacts the reverse bevel of the abutment plate, pushing the abutment plate to slide and squeeze the compression spring, forming a gap to allow sewage to flow into the inner cavity, during which the sliding port and the liquid outlet gradually overlap, and the smooth discharge of impurities in the inner cavity is promoted by the rotating squeezing action of the filter plate.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, and in particular to a sampling device capable of preliminary filtration for sewage treatment. Background Art

[0002] Sewage, which is water that has lost its original function due to various pollution sources (including industrial production, agricultural activities and daily life emissions), contains abundant harmful substances, such as organic matter, inorganic matter, microorganisms and heavy metals. These pollutants not only directly damage the ecological health of water bodies, but may also indirectly threaten human health through the food chain or drinking water.

[0003] In the rigorous system of environmental monitoring, it is crucial to ensure that sewage discharge complies with regulatory standards and to conduct accurate and comprehensive sampling of untreated sewage. However, the currently widely used sampling technology, which uses wire to wrap around the tank and sink it into the sewage, can basically complete the sampling task, but it has significant shortcomings.

[0004] Specifically, this technology ignores the key step of sewage pretreatment - preliminary filtration. A large number of particulate matter, flocs and other impurities mixed in the sewage are collected without screening, which not only seriously interferes with the accuracy of subsequent analysis and testing, but may also cause damage to precision testing equipment and shorten its service life.

[0005] In addition, this sampling method has limitations, namely, each operation can only sample the sewage once. If the sewage needs to be sampled multiple times, repeated salvage operations are required, which is not only inefficient but also cumbersome to operate, increasing the difficulty and cost of the sampling work. Summary of the invention

[0006] The purpose of the present invention is to solve the problem that traditional technology ignores the key step of sewage pretreatment - preliminary filtration, and a large amount of particulate matter, floccules and other impurities mixed in the sewage are collected without screening, which not only seriously interferes with the accuracy of subsequent analysis and testing, but also may cause damage to the precision detection equipment and shorten its service life. In addition, the sampling method has limitations, that is, each operation can only sample the sewage once. If the sewage needs to be sampled multiple times, repeated salvage operations are required, which is not only inefficient, but also cumbersome to operate, increasing the difficulty and cost of the sampling work. Therefore, the proposed solution is proposed.

[0007] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a sampling device based on preliminary filtration for sewage treatment: comprising a pull rod, the bottom of which is connected to a treatment cylinder through a connecting plate, the inner thread of the treatment cylinder is connected to a closing cover, and one side of the treatment cylinder is provided with a liquid inlet and a liquid outlet, and further comprising: a driving mechanism and a scraping assembly installed inside the treatment cylinder, and a collecting assembly is also installed inside the treatment cylinder;

[0008] The driving mechanism comprises a micro motor installed outside the treatment cylinder, the output shaft of the micro motor passes through the treatment cylinder and is connected to a rotating shaft, the outer periphery of the rotating shaft is connected to a filter plate, and a plurality of filter ports are opened on the side of the filter plate;

[0009] The scraper assembly comprises a fixed frame fixedly installed inside the treatment cylinder, a slide groove is provided inside the fixed frame, a contact plate abutting against the filter plate is slidably connected to the inner wall of the slide groove, a telescopic spring is connected between the contact plate and the slide groove, a moving groove is provided on one side of the fixed frame, a moving plate is connected to one side of the contact plate, a scraper abutting against the filter plate is connected to one side of the moving plate, two closing blocks connected to the filter plate are fixedly connected inside the treatment cylinder, and a scraper is installed inside the closing block;

[0010] The rotating shaft is driven to rotate by a micro motor, and the filter plate is rotated to filter the sewage entering from the liquid inlet, so that the particles and flocs are attached to the outside of the filter port. As the filter plate continues to rotate, the scraper scrapes off the particles and flocs attached to the periphery of the filter plate.

[0011] As a further description of the above technical solution:

[0012] The scraper includes an inner cavity opened inside one of the closing blocks, and the inner wall of the inner cavity is slidably connected with an abutment plate, the abutment plate and the inner cavity are connected by a compression spring, one side of the abutment plate abuts against the scraper, and a sliding opening is opened inside the abutment plate.

[0013] As a further description of the above technical solution:

[0014] The side of the scraper plate abutting against the abutting plate is provided with an oblique angle, and the side of the abutting plate close to the scraper plate is provided with a chamfer angle adapted to the oblique angle, and when the scraper plate is at a high point, the sliding material port and the liquid outlet do not overlap.

[0015] As a further description of the above technical solution:

[0016] The collecting assembly includes a pressing rod connected to the bottom of the moving plate and a liquid collection tank opened inside the treatment cylinder, and the inside of the liquid collection tank is connected to a conical block and a fan-shaped elastic sealing sheet connected below the conical block, and a collecting piece is installed below the elastic sealing sheet.

[0017] As a further description of the above technical solution:

[0018] The collecting member comprises a rotating column connected to the top of the closing cover and rotatably connected, a rotating disk is fixedly connected to the top of the rotating column, a plurality of circularly distributed inlay grooves are provided on the upper surface of the rotating disk, a collecting cylinder is placed inside the inlay groove, and the collecting cylinder rotates through the movable parts inside the processing cylinder.

[0019] As a further description of the above technical solution:

[0020] The movable part comprises a fixed plate fixedly connected inside the treatment cylinder, both sides of the fixed plate are rotatably connected with the rotating cylinder through the connecting plate, and the collecting port of the collecting cylinder passes through the rotating cylinder and contacts with the elastic sealing sheet.

[0021] As a further description of the above technical solution:

[0022] The bottom of the movable plate is connected with an adjusting component, which includes a descending block installed at the bottom of the movable plate and a sliding rod slidably connected to the inside of the processing cylinder, and the descending block is slidably connected to the inside of the sliding rod, a pressure spring is connected between the bottom of the descending block and the sliding rod, a plurality of limit blocks are connected to the inside of the sliding rod, the limit blocks and the descending blocks are connected by contact pieces, a limit groove is provided on the outer periphery of the rotating cylinder, and the sliding rod and the limit groove are connected by abutment pieces.

[0023] As a further description of the above technical solution:

[0024] The abutment member comprises a mounting block connected to the bottom of the sliding rod, an inner groove is provided inside the mounting block, an abutment column is slidably connected to the inner wall of the inner groove, and an extrusion spring is connected between the abutment column and the inner groove.

[0025] As a further description of the above technical solution:

[0026] The contact piece includes a groove opened inside the descending block, the inner wall of the groove is slidably connected with an abutment block in contact with the limit block, and a connecting spring is connected between the abutment block and the groove, an avoidance groove is opened at the bottom of the descending block, a clamping plate adapted to the avoidance groove is fixedly connected inside the sliding rod, a contraction groove is opened inside the abutment block, a limiting plate is slidably connected to the inner wall of the contraction groove, a reset spring is connected between the limiting plate and the contraction groove, and one side of the limiting plate is set to an inclined angle.

[0027] As a further description of the above technical solution:

[0028] The bottom of the vertical groove of the limiting groove is more concave inward than the top of the vertical groove, and there is a step between the bottom of the vertical groove and the top of the vertical groove. The concavity between the tops of the vertical grooves is the same, and the concavity between the bottoms of the vertical grooves is also the same.

[0029] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0030] Before the treatment cylinder is completely immersed in sewage, the micro motor is started in advance, which drives the rotating shaft to rotate, thereby driving the uniquely designed filter plate to perform circular motion. The subtlety of this design lies in that the filter plate effectively stirs the sewage when rotating, promoting the rapid separation and attachment of larger particles and flocs;

[0031] As the filter plate continues to rotate, the frequent contact between the edge and the contact plate triggers the lifting movement in the chute. This mechanical linkage not only compresses and releases the telescopic spring, but also drives the synchronous lifting and lowering of the moving plate and the scraper through the connection mechanism. The scraper is close to the filter plate, effectively scraping off the impurities accumulated on the surface, significantly preventing the impurities from entering the treatment cylinder, thereby ensuring the purity of subsequent treatment;

[0032] Furthermore, when the scraper plate descends with the contact plate, the impurities on its surface are scraped off by the edge of the abutment plate, and at the same time, the bevel contacts the chamfered bevel of the abutment plate, pushing the abutment plate to slide and squeeze the compression spring, forming a gap to allow sewage to flow into the inner cavity. In this process, the sliding port and the liquid outlet gradually overlap, which not only opens up a channel for the sewage to flow in, but also promotes the smooth discharge of impurities in the inner cavity through the rotation and squeezing action of the filter plate, significantly improving the efficiency and effect of sewage treatment;

[0033] In order to achieve efficient multiple sampling and collection of sewage, a mechanical linkage design is used. When the moving plate descends, it simultaneously drives the descending block to descend, thereby pushing the sliding rod to move vertically, and the abutment column in the mounting block at the bottom of the sliding rod slides down smoothly along the vertical part of the limit groove. As the moving plate and the descending block rise, the abutment column continues to move in the limit groove. In this process, its abutment effect is converted into rotational force, driving the rotating cylinder to rotate. The rotation of the rotating cylinder drives the two connecting plates embedded inside to slide on the outer periphery of the fixed plate, thereby changing the position of the collecting cylinder. The specially designed rotating disk rotates with the rotating column as the center of the circle to ensure that whenever the collecting cylinder rotates to contact the elastic sealing sheet, the new collecting cylinder is ready to receive the sewage that has been preliminarily treated. This design significantly improves the sampling efficiency and accuracy. Each collecting cylinder can receive sewage in sequence and automatically change positions to prepare for the next sampling.

[0034] In order to accurately control the rotation frequency of the rotating drum, during the lifting and lowering process of the descending block, the contact and separation of the abutment block and the limit block, combined with the synergistic effect of the connecting spring, the pressure spring and the return spring, are used to achieve precise control of the rotation timing of the rotating drum. Specifically, when the descending block descends and rises for the first time, energy is accumulated for the rotation of the rotating drum through the compression and release of a series of springs. When the descending block descends and rises for the second time, the specific interaction between the abutment block and the limit block, combined with the push of the return spring, unlocks the rising action of the sliding rod, thereby driving the rotating drum to rotate. This process not only delays the rotation frequency of the rotating drum, but also enables the downward pressure rod to be pressed down multiple times, so as to squeeze and load the sewage in the collection drum multiple times, thereby further improving the sampling efficiency and accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 Shows a schematic diagram of the overall structure according to the present invention;

[0036] Figure 2 It shows a schematic diagram of the disassembly structure of the treatment cylinder and the sealing cover according to the present invention;

[0037] Figure 3 A schematic diagram of the internal structure of the treatment cylinder according to the present invention is shown;

[0038] Figure 4 It is shown that according to the present invention Figure 3 The enlarged structural diagram at A in the middle;

[0039] Figure 5 A schematic cross-sectional view of the treatment barrel according to the present invention from another perspective is shown;

[0040] Figure 6 It is shown that according to the present invention Figure 5 The enlarged structural diagram at B in the middle;

[0041] Figure 7 It is shown that according to the present invention Figure 5 The enlarged structural diagram at C in the middle;

[0042] Figure 8 A schematic diagram of the structure of the regulating assembly according to the present invention is shown;

[0043] Fig. 9 A schematic diagram of the abutment block structure according to the present invention is shown.

[0044] Legend:

[0045] 10. pull rod; 11. connecting plate; 12. treatment cylinder; 121. liquid inlet; 122. liquid outlet; 13. closing cover;

[0046] 20. driving mechanism; 21. micro motor; 22. rotating shaft; 23. filter plate; 231. filter port;

[0047] 30. Scraper assembly; 31. Fixed frame; 311. Slide groove; 312. Moving groove; 32. Contact plate; 33. Telescopic spring; 34. Moving plate; 35. Scraper; 351. Bevel; 36. Closing block; 361. Inner cavity; 362. Abutment plate; 363. Compression spring; 364. Sliding opening;

[0048] 40. Collecting assembly; 41. Pressing rod; 42. Liquid accumulating tank; 421. Conical block; 43. Elastic sealing sheet; 44. Rotating column; 45. Rotating disk; 46. Inlaying groove; 47. Rotating cylinder; 471. Collecting cylinder; 48. Fixing plate; 49. Connecting plate;

[0049] 50. Adjustment assembly; 51. Descending block; 511. Groove; 512. Connecting spring; 513. Abutment block; 514. Contraction groove; 515. Limitation plate; 516. Inclination angle; 517. Reset spring; 518. Avoidance groove; 519. Snap-in plate; 52. Sliding rod; 521. Limiting block; 53. Mounting block; 531. Inner groove; 532. Abutment column; 533. Extrusion spring; 54. Limiting groove; 55. Pressure spring. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] like Figure 1-Figure 9 As shown, the present invention provides a sampling device for preliminary filtration for sewage treatment: comprising a pull rod 10, the bottom of the pull rod 10 is connected to a treatment barrel 12 through a connecting plate 11, the inner thread of the treatment barrel 12 is connected to a closing cover 13, and one side of the treatment barrel 12 is provided with a liquid inlet 121 and a liquid outlet 122, and further comprising: a driving mechanism 20 and a scraper assembly 30 installed inside the treatment barrel 12, and a collecting assembly 40 is also installed inside the treatment barrel 12;

[0052] When it is necessary to collect and sample untreated sewage, the pull rod 10 must first be slowly immersed in the sewage to ensure that the pull rod 10 is completely immersed. As the pull rod 10 goes deeper, the treatment cylinder 12 closely connected to it will also be immersed in the sewage. At this time, the sewage will naturally flow into its internal space along the preset liquid inlet 121 on the treatment cylinder 12, thereby realizing the effective collection and preliminary sampling of the sewage. This step not only ensures the smooth progress of the sampling, but also lays a solid foundation for the subsequent sewage analysis and treatment work.

[0053] like Figure 1 , Figure 3 , Figure 4 , Figure 5 As shown, the driving mechanism 20 includes a micro motor 21 installed outside the treatment cylinder 12. The micro motor 21 is waterproof. The output shaft of the micro motor 21 passes through the treatment cylinder 12 and is connected to a rotating shaft 22. The outer periphery of the rotating shaft 22 is connected to a triangular filter plate 23, and the side of the filter plate 23 is provided with a plurality of filter ports 231.

[0054] Before the treatment cylinder 12 is completely immersed in the sewage, the micro motor 21 is first started. The activation of the micro motor 21 drives the rotating shaft 22 to start rotating, and the rotating motion of the rotating shaft 22 drives the filter plate 23 fixed thereon to perform synchronous circular motion. It is worth noting that the design of the filter plate 23 is very unique, and a filter port 231 is only provided on one corner thereof. This design enables the filter plate 23 to effectively stir the sewage between the two sealing blocks 36 when rotating in the sewage.

[0055] As the filter plate 23 continues to rotate and stir, larger particles and flocs in the sewage will gradually be thrown toward and adhere to the outer surface of the filter plate 23. This process not only helps to separate impurities in the sewage, but also ensures that the subsequent filter port 231 can reduce the risk of being blocked by large particles or flocs when passing sewage, thereby improving the efficiency and accuracy of sampling and processing.

[0056] like Figure 1 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, the scraper assembly 30 includes a fixed frame 31 fixedly installed inside the treatment cylinder 12, a slide groove 311 is provided inside the fixed frame 31, a contact plate 32 abutting against the filter plate 23 is slidably connected to the inner wall of the slide groove 311, a telescopic spring 33 is connected between the contact plate 32 and the slide groove 311, a moving groove 312 is provided on one side of the fixed frame 31, a moving plate 34 is connected to one side of the contact plate 32, a scraper 35 abutting against the filter plate 23 is connected to one side of the moving plate 34, two closing blocks 36 connected to the filter plate 23 are fixedly connected inside the treatment cylinder 12, and the closing blocks 36 are installed inside There is a scraper, which includes an inner cavity 361 opened inside one of the closing blocks 36, and the inner wall of the inner cavity 361 is slidably connected with an abutment plate 362, the abutment plate 362 and the inner cavity 361 are connected by a compression spring 363, one side of the abutment plate 362 abuts against the scraper 35, a sliding opening 364 is opened inside the abutment plate 362, a side of the scraper 35 abutting against the abutment plate 362 is provided with an inclined angle 351, and a side of the abutment plate 362 close to the scraper 35 is provided with a chamfer adapted to the inclined angle 351, and when the scraper 35 is at a high point, the sliding opening 364 does not overlap with the liquid outlet 122;

[0057] During the rotation of the filter plate 23, its edge will continuously contact with the contact plate 32, driving the contact plate 32 to move up and down in the slide groove 311, and compressing and releasing the telescopic spring 33 at the same time. This lifting and lowering movement is synchronously transmitted to the moving plate 34 through the connection mechanism, so that the moving plate 34 slides in the moving groove 312, and then the scraper 35 is driven by the moving plate 34 to perform corresponding lifting and lowering movements. Since the scraper 35 always keeps in contact with the filter plate 23, as the filter plate 23 rotates, the scraper 35 can effectively scrape and clean the impurities accumulated on the surface of the filter plate 23, preventing these impurities from entering the treatment tube 12 as the filter plate 23 rotates, and the lengths of the contact plate 32 and the scraper 35 are the same as those of the filter plate 23, which can prevent untreated sewage from entering the treatment tube 12.

[0058] When the contact plate 32 drives the scraper plate 35 to descend synchronously due to the descent of the filter plate 23, a small amount of impurities on the surface of the scraper plate 35 will be scraped off by the edge of the abutment plate 362. As the scraper plate 35 further descends, the bevel 351 on it will contact the chamfer of the abutment plate 362, pushing the abutment plate 362 to slide in the inner cavity 361 and compressing the compression spring 363. At this time, a gap is formed between the abutment plate 362 and the scraper plate 35, allowing the sewage to flow into the inner cavity 361 through this gap under the push of the filter plate 23.

[0059] It is worth noting that, during the contact between the bevel 351 and the chamfered bevel of the abutment plate 362, the sliding opening 364 and the liquid outlet 122, which were originally non-overlapping, gradually overlap. This change not only provides a channel for the inflow of sewage, but also enables the filter plate 23 to squeeze the impurities accumulated in the inner cavity 361 during the rotation process, so that the impurities are smoothly discharged from the treatment cylinder 12 through the overlapping sliding opening 364 and the liquid outlet 122.

[0060] In addition, when the filter plate 23 rotates so that the filter port 231 thereon is no longer blocked by the scraper 35 or the contact plate 32, a small amount of treated sewage will flow directly into the treatment barrel 12 through the filter port 231. This process is particularly obvious when the scraper 35 drops to the lowest point and the contact plate 32 rises to the highest point, which provides convenience for subsequent sewage collection and treatment work.

[0061] like Figure 1 , Figure 3 , Figure 5 , Figure 7As shown, the collecting assembly 40 includes a pressing rod 41 connected to the bottom of the movable plate 34 and a liquid collection groove 42 opened inside the processing cylinder 12, and the inside of the liquid collection groove 42 is connected to a conical block 421 and a fan-shaped elastic sealing sheet 43 connected below the conical block 421, and a collecting member is installed below the elastic sealing sheet 43, and the collecting member includes a rotating column 44 connected to the top of the closing cover 13 and rotatably connected, and a rotating disk 45 is fixedly connected to the top of the rotating column 44, and a plurality of circularly distributed inlaid grooves 46 are opened on the upper surface of the rotating disk 45, and a collecting cylinder 471 is placed inside the inlaid groove 46, and the collecting cylinder 471 is rotated by the movable part inside the processing cylinder 12, and the movable part includes a fixed plate 48 fixedly connected to the inside of the processing cylinder 12, and the two sides of the fixed plate 48 are rotatably connected to the rotating cylinder 47 through the connecting plate 49, and the collecting port of the collecting cylinder 471 passes through the rotating cylinder 47 and contacts with the elastic sealing sheet 43;

[0062] After the sewage is collected and flows into the treatment cylinder 12, it will gradually accumulate in the liquid accumulation tank 42. At this time, with each descent of the movable plate 34 in the movable tank 312, the pressing rod 41 connected to the bottom thereof will be driven to move vertically synchronously. The continuous descent of the pressing rod 41 will gradually make it penetrate into the liquid accumulation tank 42, thereby exerting pressure on the sewage in the tank.

[0063] Under the action of pressure, the sewage in the liquid storage tank 42 will flow along the inclined surface of the conical block 421. This design helps to enhance the flow rate and flow direction of the sewage. When the sewage hits the elastic sealing sheet 43, its force is enough to make the elastic sealing sheet 43 unfold downward, thereby unlocking the original sealing state. In this process, the sewage will flow smoothly into the collection tube 471 along the opening opened by the elastic sealing sheet 43, thereby realizing the collection and sampling work of the sewage after preliminary treatment;

[0064] When the moving plate 34 and the pressing rod 41 subsequently rise, the elastic sealing sheet 43 will gradually restore its original shape and elasticity after losing the squeezing effect of the pressing rod 41, and re-form a sealing state. This design not only ensures that the treated sewage in the collecting cylinder 471 will not flow back or leak, but also provides convenience and guarantee for the subsequent sewage collection work;

[0065] When sewage is accelerated through the conical block 421, turbulence and shear force in the sewage can be increased, which helps to accelerate the sedimentation of impurity particles suspended in the water, making subsequent detection easier.

[0066] like Figure 1 , Figure 3 , Figure 5 , Figure 8 , Fig. 9As shown, an adjusting assembly 50 is connected to the bottom of the movable plate 34, and the adjusting assembly 50 includes a descending block 51 installed at the bottom of the movable plate 34, and a sliding rod 52 slidably connected to the inside of the processing cylinder 12, and the descending block 51 is slidably connected to the inside of the sliding rod 52, and a pressure spring 55 is connected between the bottom of the descending block 51 and the sliding rod 52, and a plurality of limit blocks 521 are connected to the inside of the sliding rod 52, and the limit blocks 521 and the descending block 51 are connected through a contact member, and the contact member includes a groove 511 opened in the descending block 51, and the inner wall of the groove 511 is slidably connected to an abutment block 513 in contact with the limit block 521, and a connecting spring 512 is connected between the abutment block 513 and the groove 511, and an avoidance groove 518 is opened at the bottom of the descending block 51, and a clamping plate 51 adapted to the avoidance groove 518 is fixedly connected to the inside of the sliding rod 52 9. A contraction groove 514 is provided inside the abutment block 513, and a limiting plate 515 is slidably connected to the inner wall of the contraction groove 514. A return spring 517 is connected between the limiting plate 515 and the contraction groove 514, and one side of the limiting plate 515 is set to an inclined angle 516. A limiting groove 54 is provided on the outer periphery of the rotating cylinder 47, and the sliding rod 52 is connected to the limiting groove 54 through an abutment member, and the abutment member includes a mounting block 53 connected to the bottom of the sliding rod 52, an inner groove 531 is provided inside the mounting block 53, and an abutment column 532 is slidably connected to the inner wall of the inner groove 531, and an extrusion spring 533 is connected between the abutment column 532 and the inner groove 531, the vertical groove bottom of the limiting groove 54 is more concave inwardly than the vertical groove top, and there is a step between the vertical groove bottom and the vertical groove top, the concavity between the vertical groove tops is the same, and the concavity between the vertical groove bottoms is also the same;

[0067] In order to achieve multiple sampling and collection of sewage, when the moving plate 34 descends, it will synchronously drive the descending block 51 to descend together, and the descent of the descending block 51 will push the sliding rod 52 to move vertically. The mounting block 53 installed at the bottom of the sliding rod 52 is internally equipped with abutment columns 532, and these abutment columns 532 smoothly descend along the vertical part of the limiting groove 54;

[0068] When the abutment column 532 reaches the bottom of the vertical slot, it encounters a step. At this time, under the elastic force of the extrusion spring 533, the abutment column 532 extends to cross the step and prepare to enter the next part of the limiting slot 54;

[0069] Then, when the moving plate 34 and the descending block 51 rise, the abutting column 532 inside the mounting block 53 will continue to move along the limiting groove 54 through the transmission of the sliding rod 52. During this movement, the abutting effect of the abutting column 532 will be converted into a rotational force, driving the rotating cylinder 47 to rotate;

[0070] The rotation of the rotating cylinder 47 will further drive the two connecting plates 49 embedded therein to slide on the outer periphery of the fixed plate 48. Since the collecting cylinder 471 is fixedly connected in the rotating cylinder 47, the position of the collecting cylinder 471 will also change accordingly as the rotating cylinder 47 rotates.

[0071] In particular, the outer circumference of the collecting cylinder 471 is connected with a rotating disk 45, and these rotating disks 45 rotate with the rotating column 44 as the center of the circle, so that every time the collecting cylinder 471 rotates to a position in contact with the elastic sealing sheet 43, there will be a new collecting cylinder 471 ready to receive the sewage that has been preliminarily treated from below the elastic sealing sheet 43;

[0072] Through the above, multiple sampling and collection of sewage can be achieved. Each collection tube 471 can receive sewage in sequence and automatically change positions after completion to prepare for the next sampling work. This design greatly improves the sampling efficiency and accuracy.

[0073] In order to effectively control the rotation frequency of the rotating drum 47, the specific working process is as follows:

[0074] When the descending block 51 descends for the first time, the abutment block 513 built into it will press down the sliding rod 52, causing the abutment column 532 to move limitedly in the limiting groove 54. However, when the descending block 51 starts to rise, the abutment block 513 will meet and contact the limiting block 521 inside the sliding rod 52. This contact causes the abutment block 513 to slide in the groove 511 and compress the connecting spring 512 at the same time. As the descending block 51 continues to rise, the abutment block 513 will move to the half position of the limiting block 521. At this time, the resilience of the connecting spring 512 begins to limit the further movement of the abutment block 513 and stretch the pressure spring 55.

[0075] When the descending block 51 completes the first ascent and starts the second descent, the abutment block 513 continues to apply pressure to the limit block 521, pushing the sliding rod 52 and the abutment column 532 to descend together, and the abutment column 532 passes over the step in the limit slot 54 and moves to the bottom of the next vertical slot. At this time, the resilience of the squeezing spring 533 makes the abutment column 532 close to the side wall of the limit slot 54;

[0076] As the descending block 51 rises again, the abutting block 513 contacts the limiting block 521 again and retracts into the groove 511. When the abutting block 513 is fully retracted, it drives the limiting plate 515 in the compressed state to move together. When the limiting plate 515 is aligned with the avoidance groove 518, the resilience of the return spring 517 pushes the limiting plate 515 into the avoidance groove 518, thereby locking the position of the abutting block 513.

[0077] Since the limiting function of the abutment block 513 is lost between the descending block 51 and the sliding rod 52 at this time, the pressure spring 55 in the stretched state starts to pull the sliding rod 52 upward along the outer periphery of the descending block 51. This upward movement causes the abutment column 532 to slide from the bottom of the current vertical groove to the top of the adjacent vertical groove, thereby driving the rotating cylinder 47 to rotate.

[0078] The rotation of the rotating cylinder 47 will drive the collection cylinder 471 and other components to change their positions, preparing for the next sampling. When the sliding rod 52 is reset under the action of the pressure spring 55, the internal clamping plate 519 will abut against the inclined angle 516 of the limiting plate 515, so that the limiting plate 515 is retracted into the contraction groove 514. At this time, the rebound force of the connecting spring 512 pushes the abutment block 513 to reset and contact with the limit block 521 again, preparing for the next rotation operation.

[0079] The rotation frequency of the rotating cylinder 47 is successfully delayed by the above, so that the pressing rod 41 can perform multiple pressing operations, thereby squeezing and charging the sewage inside the collecting cylinder 471 multiple times, thereby improving the sampling efficiency and accuracy.

[0080] Working principle: In the process of collecting and sampling untreated sewage, the pull rod 10 must first be completely immersed in the sewage, driving the treatment tube 12 to be immersed synchronously. At this time, the sewage flows into the treatment tube 12 through the liquid inlet 121. The micro motor 21 is started in advance to drive the rotating shaft 22 to drive the filter plate 23 to rotate. The unique design of the filter plate 23 effectively stirs the sewage, causing large particles and flocs to adhere to the plate surface;

[0081] As the filter plate 23 rotates, its edge contacts the contact plate 32, causing the contact plate 32 to move up and down in the chute 311, and the moving plate 34 and the scraper 35 are driven to move up and down synchronously through the connection mechanism. The scraper 35 is closely attached to the filter plate 23, effectively removing impurities on its surface and preventing the impurities from entering the treatment cylinder 12.

[0082] When the scraper 35 descends, impurities on its surface are scraped off by the abutment plate 362, and the bevel 351 contacts the inverted bevel of the abutment plate 362, pushing the abutment plate 362 to slide and squeeze the compression spring 363, forming a gap to allow sewage to flow into the inner cavity 361, and at the same time, the sliding port 364 gradually overlaps with the liquid outlet 122, promoting the discharge of impurities in the inner cavity 361;

[0083] The sewage accumulates in the liquid storage tank 42 of the treatment tube 12. As the movable plate 34 descends, the lower pressure rod 41 moves vertically synchronously, exerting pressure on the sewage. The sewage accelerates along the inclined surface of the conical block 421 and impacts the elastic sealing sheet 43, causing it to expand and release the seal. The sewage flows smoothly into the collection tube 471, completing the collection and sampling work after preliminary treatment.

[0084] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A sampling device for preliminary filtration for sewage treatment, comprising a pull rod (10), the bottom of the pull rod (10) is connected to a treatment cylinder (12) via a connecting plate (11), the inner thread of the treatment cylinder (12) is connected to a closing cover (13), and one side of the treatment cylinder (12) is provided with a liquid inlet (121) and a liquid outlet (122), characterized in that: It also includes: a driving mechanism (20) and a scraping assembly (30) installed inside the processing cylinder (12); a collecting assembly (40) is also installed inside the processing cylinder (12); The driving mechanism (20) comprises a micro motor (21) mounted on the outside of the processing cylinder (12); the output shaft of the micro motor (21) passes through the processing cylinder (12) and is connected to a rotating shaft (22); the outer periphery of the rotating shaft (22) is connected to a triangular filter plate (23), and a filter port (231) is provided only at one corner of the triangular filter plate (23); The scraper assembly (30) comprises a fixed frame (31) fixedly mounted inside the processing cylinder (12), a slide groove (311) being provided inside the fixed frame (31), a contact plate (32) abutting against the filter plate (23) being slidably connected to the inner wall of the slide groove (311), a telescopic spring (33) being connected between the contact plate (32) and the slide groove (311), a movable groove (312) being provided on one side of the fixed frame (31), a movable plate (34) being connected to one side of the contact plate (32), a scraper (35) abutting against the filter plate (23) being connected to one side of the movable plate (34), a contact position of the scraper (35) with the filter plate (23) being arranged in an arc shape, and the scraper (35) and the contact plate (32) are always aligned with the center of the rotating shaft (22), two closing blocks (36) connected to the filter plate (23) being fixedly connected inside the processing cylinder (12), and a scraping member being installed inside the closing block (36); The rotating shaft (22) is driven to rotate by the micro motor (21), and the filter plate (23) is caused to rotate and filter the sewage entering from the liquid inlet (121), so that the particles and flocs are attached to the outside of the filter port (231), and as the filter plate (23) continues to rotate, the scraper (35) scrapes off the particles and flocs attached to the periphery of the filter plate (23).

2. A sampling device based on preliminary filtration for sewage treatment according to claim 1, characterized in that: The scraper comprises an inner cavity (361) opened inside one of the closing blocks (36), and an abutment plate (362) is slidably connected to the inner wall of the inner cavity (361), the abutment plate (362) and the inner cavity (361) are connected via a compression spring (363), one side of the abutment plate (362) abuts against the scraper (35), and a sliding opening (364) is opened inside the abutment plate (362).

3. A sampling device based on preliminary filtration for sewage treatment according to claim 2, characterized in that: The side of the scraper (35) abutting against the abutting plate (362) is provided with an oblique angle (351), and the side of the abutting plate (362) close to the scraper (35) is provided with a chamfered angle adapted to the oblique angle (351), and when the scraper (35) is at a high point, the sliding material port (364) and the liquid outlet (122) do not overlap.

4. A sampling device based on preliminary filtration for sewage treatment according to claim 1, characterized in that: The collecting assembly (40) comprises a pressing rod (41) connected to the bottom of the moving plate (34) and a liquid collection groove (42) provided inside the processing cylinder (12), wherein the interior of the liquid collection groove (42) is connected to a conical block (421) and a fan-shaped elastic sealing sheet (43) connected below the conical block (421), and a collecting piece is installed below the elastic sealing sheet (43).

5. A sampling device based on preliminary filtration for sewage treatment according to claim 4, characterized in that: The collecting member comprises a rotating column (44) connected to the top of the closing cover (13) and rotatably connected thereto; a rotating disk (45) is fixedly connected to the top of the rotating column (44); a plurality of circularly distributed inlaid grooves (46) are provided on the upper surface of the rotating disk (45); a collecting cylinder (471) is placed inside the inlaid grooves (46); and the collecting cylinder (471) rotates through a movable member inside the processing cylinder (12).

6. A sampling device based on preliminary filtration for sewage treatment according to claim 5, characterized in that: The movable part comprises a fixed plate (48) fixedly connected to the inside of the treatment cylinder (12); both sides of the fixed plate (48) are rotatably connected to the rotating cylinder (47) via connecting plates (49); and a collection port of the collection cylinder (471) passes through the rotating cylinder (47) and contacts the elastic sealing sheet (43).

7. A sampling device based on preliminary filtration for sewage treatment according to claim 6, characterized in that: The bottom of the movable plate (34) is connected to an adjustment assembly (50), the adjustment assembly (50) comprising a descending block (51) mounted on the bottom of the movable plate (34), and a sliding rod (52) slidably connected to the inside of the processing cylinder (12), the descending block (51) is slidably connected to the inside of the sliding rod (52), a pressure spring (55) is connected between the bottom of the descending block (51) and the sliding rod (52), a plurality of limit blocks (521) are connected to the inside of the sliding rod (52), the limit blocks (521) and the descending block (51) are connected via contact pieces, a limit groove (54) is provided on the outer periphery of the rotating cylinder (47), and the sliding rod (52) and the limit groove (54) are connected via abutment pieces; The abutment member comprises a mounting block (53) connected to the bottom of the sliding rod (52); an inner groove (531) is provided inside the mounting block (53); an abutment column (532) is slidably connected to the inner wall of the inner groove (531); and a compression spring (533) is connected between the abutment column (532) and the inner groove (531); The bottom of the vertical groove of the limiting groove (54) is more concave inward than the top of the vertical groove, and there is a step between the bottom of the vertical groove and the top of the vertical groove, and the concavity between the tops of the vertical grooves is the same, and the concavity between the bottoms of the vertical grooves is also the same; The contact member comprises a groove (511) provided inside the descending block (51), the inner wall of the groove (511) is slidably connected to an abutting block (513) in contact with the limit block (521), and a connecting spring (512) is connected between the abutting block (513) and the groove (511), a avoidance groove (518) is provided at the bottom of the descending block (51), a clamping plate (519) adapted to the avoidance groove (518) is fixedly connected inside the sliding rod (52), a contraction groove (514) is provided inside the abutting block (513), a limiting plate (515) is slidably connected to the inner wall of the contraction groove (514), a return spring (517) is connected between the limiting plate (515) and the contraction groove (514), and one side of the limiting plate (515) is set to an inclined angle (516); When the descending block (51) descends for the first time, the abutment block (513) built into it will press down the sliding rod (52), causing the abutment column (532) to move limitedly in the limiting groove (54); however, when the descending block (51) begins to rise, the abutment block (513) will meet and contact the limiting block (521) inside the sliding rod (52); this contact causes the abutment block (513) to slide in the groove (511) and compress the connecting spring (512); as the descending block (51) continues to rise, the abutment block (513) will move to a position halfway of the limiting block (521); at this time, the rebound force of the connecting spring (512) begins to limit the further movement of the abutment block (513) and stretch the pressure spring (55); When the descending block (51) completes the first ascent and begins the second descent, the abutment block (513) continues to exert pressure on the limiting block (521), pushing the sliding rod (52) and the abutment column (532) to descend together, and the abutment column (532) passes over the step in the limiting groove (54) and moves to the bottom of the next vertical groove. At this time, the rebound force of the extrusion spring (533) causes the abutment column (532) to be closely attached to the side wall of the limiting groove (54); As the descending block (51) rises a second time, the abutting block (513) contacts the limiting block (521) again and retracts into the groove (511). When the abutting block (513) is fully retracted, it drives the limiting plate (515) in a compressed state to move together. When the limiting plate (515) is aligned with the avoidance groove (518), the rebound force of the return spring (517) pushes the limiting plate (515) into the avoidance groove (518), thereby locking the position of the abutting block (513). Since the limiting function of the abutment block (513) between the descending block (51) and the sliding rod (52) is lost at this time, the pressure spring (55) in the stretched state starts to pull the sliding rod (52) upward along the outer periphery of the descending block (51), and this upward movement causes the abutment column (532) to slide from the bottom of the current vertical slot to the top of the adjacent vertical slot, thereby driving the rotating cylinder (47) to rotate; The rotation of the rotating cylinder (47) drives the collecting cylinder (471) and other components to change their positions, preparing for the next sampling. When the sliding rod (52) is reset under the action of the pressure spring (55), the internal clamping plate (519) thereof abuts against the inclined angle (516) of the limiting plate (515), causing the limiting plate (515) to retract into the contraction groove (514). At this time, the rebound force of the connecting spring (512) pushes the abutment block (513) to reset and contact with the limit block (521) again, preparing for the next rotation operation.

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