A wastewater pretreatment apparatus

Abstract

The application belongs to the technical field of wastewater treatment, and particularly relates to a wastewater pretreatment device. The device comprises two interval arranged supports, a first cylinder, and a discharging mechanism. The first cylinder is fixedly arranged at the two supports at two ends respectively, and is provided with a first through hole, a first feeding port, and a plurality of first filter holes. The plurality of first filter holes and the first feeding port are in communication with the first through hole. The discharging mechanism comprises a lead screw, a discharging plate, a rotating shaft, and a driving device. The driving device is in transmission connection with the rotating shaft and drives the rotating shaft to make a circular motion around the center line of the lead screw, and the rotating shaft drives the discharging plate to rotate around the center line of the lead screw synchronously. The lead screw, the rotating shaft, and the discharging plate of the discharging mechanism are installed in the first cylinder. After the wastewater is filtered out in the first cylinder, the discharging plate is driven by the driving device to discharge the impurities remaining in the first cylinder, thereby avoiding the impurities from being accumulated in the first cylinder, and improving the wastewater filtering efficiency.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to a wastewater pretreatment device. Background Technology

[0002] The various stages of tobacco processing and cigarette manufacturing generate a large amount of tobacco wastewater. This wastewater contains numerous pollutants that are difficult to degrade, such as phenols, alcohols, and alkaloids. For subsequent wastewater treatment and environmental considerations, it is necessary to treat the wastewater to ensure it meets national emission standards. Currently, a common method involves adding treatment agents to treatment ponds and using a series of processes such as sedimentation, filtration, and adsorption to treat the wastewater and meet emission standards. However, during the treatment process, the wastewater not only carries a large number of impurities but also generates more impurities. These impurities can clog the flow channels, affecting subsequent wastewater treatment and reducing the overall efficiency of wastewater treatment. Therefore, a wastewater pretreatment step is needed to separate and filter out impurities from the wastewater beforehand, ensuring that subsequent treatment is not affected by these impurities.

[0003] Currently available technology includes equipment for pre-treating wastewater, effectively filtering out impurities. However, due to its structural design, the conveying device in this equipment causes impurities to accumulate over time, hindering efficient removal of these residues. These residues clog the filter pores on the inner wall, thus affecting subsequent wastewater filtration. Summary of the Invention

[0004] The purpose of this invention is to provide a wastewater pretreatment device that, during wastewater pretreatment, uses a pushing mechanism to efficiently discharge impurities accumulated in the device, thereby improving wastewater filtration efficiency.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] This invention provides a wastewater pretreatment device, comprising:

[0007] Two brackets are spaced apart;

[0008] The first cylinder has two ends fixedly mounted on the two supports. The first cylinder has a first through hole extending through it along its axial direction. The cylinder wall of the first cylinder has a first feed inlet and several first filter holes. The first feed inlet and several first filter holes are all connected to the first through hole. The first feed inlet is used to add wastewater to be treated.

[0009] The material feeding mechanism includes a lead screw, a feeding plate, a rotating shaft, and a driving device. The lead screw passes through the first through hole, and its axis coincides with the center line of the first through hole. Both ends of the lead screw are fixedly connected to two brackets. The rotating shaft passes through the first through hole and is arranged parallel to the lead screw. The feeding plate is threadedly connected to the lead screw, and its outer circumferential surface slides against the wall of the first through hole. The feeding plate has a slot, and the rotating shaft is slidably inserted into the slot. The driving device is connected to the rotating shaft and drives the rotating shaft to rotate around the center line of the lead screw. The rotating shaft can also drive the feeding plate to rotate synchronously around the center line of the lead screw.

[0010] Furthermore, the lead screw is a reciprocating lead screw.

[0011] Furthermore, the outer peripheral surface of the rotating shaft rolls into contact with the wall of the first through hole.

[0012] Furthermore, the wastewater pretreatment equipment also includes: a treatment tank, and the two supports are disposed in the treatment tank;

[0013] A salvage device includes a second cylinder and a plurality of salvage mechanisms. The second cylinder is rotatably fitted onto the first cylinder. The second cylinder wall is provided with a second feed inlet. During the rotation of the second cylinder relative to the first cylinder, the second feed inlet and the first feed inlet can be connected or misaligned. The plurality of salvage mechanisms are spaced apart along the circumference of the second cylinder. Each salvage mechanism includes a salvage bucket disposed on the outer surface of the second cylinder. The opening of the salvage bucket faces the rotation direction of the second cylinder, and the second feed inlet is located between two adjacent salvage buckets.

[0014] Furthermore, the second feed inlet has a first sidewall and a second sidewall spaced apart along the rotation direction of the second cylinder. The first sidewall is located downstream of the second sidewall. The retrieval device also includes a flap, which is rotatably connected to the second sidewall. When the first feed inlet and the second feed inlet are connected and facing each other, the flap can rotate into the first feed inlet and open the second feed inlet under external force.

[0015] Furthermore, the external force is provided by the gravity of the wastewater to be treated; and / or,

[0016] The salvage device also includes an elastic element connected between the flap and the second sidewall. The external force is provided by the elastic element, and the elastic element is configured to make the flap always have a tendency to rotate into the second cylinder.

[0017] Furthermore, the outer wall of the second cylinder is provided with a plurality of second filter holes; and / or,

[0018] The bottom wall of the salvage bucket is provided with several third filter holes.

[0019] Furthermore, the driving device is connected to the second cylinder in a transmission manner, and the driving device is capable of driving the second cylinder to rotate around the axis of the first cylinder.

[0020] Furthermore, the retrieval bucket includes a first plate and a second plate arranged parallel to and spaced apart along the axial direction of the second cylinder, a third plate connected between the first plate and the second plate, and a fourth plate. The third plate is spaced apart from the outer surface of the second cylinder, and the fourth plate is simultaneously connected to the first plate, the second plate, and the third plate. The fourth plate is connected to the outer surface of the second cylinder. The first plate, the second plate, the third plate, the fourth plate, and the outer surface of the second cylinder form a bucket for containing the wastewater to be treated. The retrieval mechanism also includes a scraping assembly, which is located between the third plate and the outer surface of the second cylinder and is slidably connected to the fourth plate along the radial direction of the second cylinder 41.

[0021] Furthermore, the scraping assembly includes a scraping plate and two sliding rods. Both ends of the two sliding rods are fixedly connected to the wall of the retrieval bucket. The two ends of the scraping plate are slidably sleeved on the two sliding rods along the radial direction of the second cylinder.

[0022] The wastewater pretreatment equipment of the present invention has at least the following beneficial effects:

[0023] The wastewater pretreatment equipment of the present invention includes two spaced-apart supports, a first cylinder, and a discharge mechanism. The first cylinder is fixedly mounted on the two supports at both ends. A first through hole is provided through the first cylinder along its axial direction. The cylinder wall has a first inlet and several first filter holes, all of which communicate with the first through hole. The first inlet is used to add wastewater to be treated. The discharge mechanism includes a lead screw, a discharge plate, a rotating shaft, and a drive device. The lead screw passes through the first through hole, and its axis coincides with the center line of the first through hole. Both ends of the lead screw are fixedly connected to the two supports. The rotating shaft passes through the first through hole and is parallel to the lead screw. The discharge plate is threadedly connected to the lead screw, and its outer circumferential surface slides against the wall of the first through hole. The discharge plate has a slot, into which the rotating shaft is slidably inserted. The drive device is connected to the rotating shaft and drives the rotating shaft to rotate around the center line of the lead screw, and the rotating shaft drives the discharge plate to rotate synchronously around the center line of the lead screw. The lead screw, rotating shaft, and discharge plate of the discharge mechanism are installed inside the first cylinder. After the wastewater is filtered out in the first cylinder, the discharge plate is driven by the drive device to discharge the impurities remaining in the first cylinder, thereby preventing the accumulation of impurities in the first cylinder and improving the wastewater filtration efficiency. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the wastewater pretreatment equipment in an embodiment of the present invention;

[0025] Figure 2 This is a top view of the wastewater pretreatment equipment in an embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the wastewater pretreatment equipment in this embodiment of the invention after removing the treatment tank and the collection frame;

[0027] Figure 4 This is a top view of the wastewater pretreatment equipment in this embodiment of the invention, after removing the treatment tank and the collection frame;

[0028] Figure 5 This is a schematic diagram of the structure of the combination of two supports, the first cylinder and the discharge mechanism in an embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram of the structure of some components in the material discharge mechanism in an embodiment of the present invention;

[0030] Figure 7 This is a schematic diagram of the salvage device in an embodiment of the present invention;

[0031] Figure 8 This is a schematic diagram of the structure of some components in the salvage device in an embodiment of the present invention;

[0032] Figure 9 This is the present invention. Figure 8A magnified view of a section at point A in the middle;

[0033] Figure 10 This is a schematic diagram of the salvage mechanism in an embodiment of the present invention;

[0034] Figure 11 This is a schematic diagram of the scraping assembly in an embodiment of the present invention;

[0035] Figure 12 This is the present invention. Figure 11 A magnified view of a section at point B in the middle.

[0036] In the picture:

[0037] 1. First cylinder; 11. First through hole; 12. First feed inlet; 13. First filter hole;

[0038] 2. Discharge mechanism; 21. Lead screw; 211. Reciprocating lead screw; 22. Discharge plate; 221. Slot; 23. Rotating shaft; 231. Roller; 24. Drive device; 241. Dual-shaft drive device; 25. First synchronous pulley; 26. Second synchronous pulley; 27. Synchronous belt; 28. Connecting rod; 29. ​​Base;

[0039] 3. Bracket;

[0040] 4. Salvage device; 41. Second cylinder; 411. Second feed inlet; 4111. First side wall; 4112. Second side wall; 412. Second filter hole; 42. Salvage mechanism; 421. Salvage bucket; 4211. First plate; 4212. Second plate; 4213. Third plate; 4214. Fourth plate; 4215. Third filter hole; 422. Scraper assembly; 4221. Scraper blade; 4222. Connector; 4223. Slide rod; 4224. Buffer; 4225. Gravity block; 43. Flip plate; 44. Elastic element; 45. Roller; 46. First transmission wheel; 47. Second transmission wheel;

[0041] 5. Treatment tank;

[0042] 6. Collection box. Detailed Implementation

[0043] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0044] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0045] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0046] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0047] This embodiment provides a wastewater pretreatment device that can be applied to wastewater treatment processes, including but not limited to tobacco processing, cigarette manufacturing, thermal power generation, domestic sewage, and textile wastewater. When treating wastewater and sewage generated in these production and daily life processes, this device can be used to perform wastewater pretreatment, separating impurities contained in the wastewater beforehand and filtering out the wastewater, ensuring that subsequent wastewater treatment is not affected by impurities.

[0048] Please refer to Figures 1 to 6As shown, the wastewater pretreatment equipment includes two spaced-apart supports 3, a first cylinder 1, and a discharge mechanism 2. The first cylinder 1 is fixed to the two supports 3 at both ends. A first through hole 11 extends through the first cylinder 1 along its axial direction. The cylinder wall of the first cylinder 1 has a first inlet 12 and several first filter holes 13, all of which communicate with the first through hole 11. The first inlet 12 is used to add wastewater to be treated. The discharge mechanism 2 includes a lead screw 21, a discharge plate 22, a rotating shaft 23, and a drive device 24. The lead screw 21 passes through the first through hole 11, and the axis of the lead screw 21 is aligned with the center line of the first through hole 11. The screw 21 is fixedly connected to two brackets 3 at both ends. The rotating shaft 23 passes through the first through hole 11 and is parallel to the screw 21. The discharge plate 22 is threadedly connected to the screw 21. The outer circumferential surface of the discharge plate 22 is slidably engaged with the hole wall of the first through hole 11. The discharge plate 22 is provided with a slot 221. The rotating shaft 23 can be slidably inserted into the slot 221. The drive device 24 is connected to the rotating shaft 23 and drives the rotating shaft 23 to rotate around the center line of the screw 21. The rotating shaft 23 can drive the discharge plate 22 to rotate synchronously around the center line of the screw 21.

[0049] Specifically, in this embodiment, the first cylinder 1 is fixedly mounted on two supports 3 at both ends to ensure that the first cylinder 1 is fixed and does not move. The opening of the first feed port 12 of the first cylinder 1 faces upward. The wastewater to be treated is added into the first through hole 11 of the first cylinder 1 through the first feed port 12, and the wastewater is filtered out from the first cylinder 1 through a plurality of first filter holes 13 connected to the first through hole 11, so that the impurities in the wastewater remain in the first cylinder 1, so as to effectively filter out the impurities in the wastewater. The first filter holes 13 are configured to prevent impurities from passing through. The drive unit 24 is connected to the rotating shaft 23. When the drive unit 24 drives the rotating shaft 23 to move in a circular motion around the center line of the lead screw 21, the rotating shaft 23 is slidably inserted into the slot 221 of the discharge plate 22, and the two ends of the lead screw 21, which is threaded to the discharge plate 22, are respectively fixedly connected to the two supports 3. Therefore, the discharge plate 22 can rotate synchronously with the rotating shaft 23 and move along the center line of the lead screw 21. With this arrangement, the discharge plate 22 can push the impurities out of the first through hole 11. And because the outer peripheral surface of the discharge plate 22 slides against the hole wall of the first through hole 11, it can ensure that all the impurities in the first through hole 11 and the impurities attached to the hole wall of the first through hole 11 are pushed out, thereby improving the efficiency of the equipment in discharging impurities and improving the wastewater filtration efficiency of the equipment.

[0050] It should be noted that the discharge plate 22 moves back and forth along the center line of the first through hole 11 once, adding one or two batches of wastewater to be treated.

[0051] Furthermore, such as Figures 3 to 6As shown, in this embodiment, the discharge mechanism 2 further includes a first synchronous pulley 25, a second synchronous pulley 26, a synchronous belt 27, a connecting rod 28, and a base 29. The drive device 24 is disposed on the base 29. The first synchronous pulley 25 is connected to the drive device 24 for transmission. The second synchronous pulley 26 is rotatably sleeved on the lead screw 21. The synchronous belt 27 is connected to both the first synchronous pulley 25 and the second synchronous pulley 26 for transmission. One end of the connecting rod 28 is connected to the second synchronous pulley 26, and the other end of the connecting rod 28 is connected to the rotating shaft 23. With this configuration, the drive device 24 can drive the first synchronous pulley 25 to rotate. The first synchronous pulley 25 drives the second synchronous pulley 26 to rotate through the synchronous belt 27. The second synchronous pulley 26 drives the connecting rod 28 to rotate while also driving the rotating shaft 23 to rotate, so that the rotating shaft 23 can perform circular motion around the center line of the lead screw 21. The connecting rod 28 has an L-shaped cross-section. This design ensures that there is a gap between the discharge plate 22 and the second synchronous wheel 26, allowing impurities to be discharged through the gap. This prevents the discharged impurities from being squeezed between the discharge plate 22 and the second synchronous wheel 26, ensuring the smooth discharge of impurities and protecting the structure of the equipment.

[0052] Furthermore, the side of the bracket 3 facing the first through hole 11 is designed with a slope, and the slope is inclined downward. This design makes it easier for the discharged impurities to slide down the slope and avoid impurities accumulating on the bracket 3.

[0053] Optionally, the lead screw 21 is a reciprocating lead screw 211. The reciprocating lead screw 211 has two threaded grooves with the same pitch and opposite directions on its outer wall. With this configuration, the drive device 24 can drive the rotating shaft 23 to rotate continuously in the same direction, thereby enabling the discharge plate 22 to reciprocate along the center line of the reciprocating lead screw 211, thereby continuously pushing out impurities from both ends of the first through hole 11, improving the efficiency of the discharge plate 22 in discharging impurities.

[0054] Optionally, such as Figure 5 As shown, the outer circumferential surface of the rotating shaft 23 rolls into contact with the wall of the first through hole 11. In this embodiment, the rotating shaft 23 can specifically be a pressing roller 231. The outer circumferential surface of the pressing roller 231 rolls into contact with the wall of the first through hole 11. With this configuration, when the pressing roller 231 moves in a circular motion around the center line of the lead screw 21, the outer circumferential surface of the pressing roller 231 will squeeze the impurities attached to the wall of the first through hole 11, thereby squeezing out the residual wastewater in the impurities. The wastewater is then filtered out through the first filter hole 13, improving the wastewater filtration efficiency of the device. At the same time, the squeezed impurities also reduce the subsequent dewatering workload. Thus, the wastewater pretreatment device further improves the overall efficiency of wastewater treatment.

[0055] Optionally, such as Figure 1 and Figure 2As shown, the wastewater pretreatment equipment also includes a treatment tank 5 and a retrieval device 4. Two supports 3 are installed in the treatment tank 5. In this embodiment, during pretreatment, the wastewater to be treated is concentrated in the treatment tank 5. The two ends of the first cylinder 1 are installed on the treatment tank 5 through the two supports 3. The first cylinder 1 is placed horizontally above the treatment tank 5. In this way, the wastewater filtered out from the first cylinder 1 falls back into the treatment tank 5 by gravity, thereby enabling the wastewater in the treatment tank 5 to be repeatedly filtered and treated, improving the treatment effect of wastewater pretreatment.

[0056] like Figure 7 and Figure 8 As shown, the salvage device 4 includes a second cylinder 41 and a plurality of salvage mechanisms 42. The second cylinder 41 is rotatably fitted onto the first cylinder 1. The cylinder wall of the second cylinder 41 is provided with a second feed inlet 411. During the rotation of the second cylinder 41 relative to the first cylinder 1, the second feed inlet 411 and the first feed inlet 12 can be connected or misaligned. The plurality of salvage mechanisms 42 are arranged at intervals along the circumferential direction of the second cylinder 41. Each salvage mechanism 42 includes a salvage bucket 421 disposed on the outer surface of the second cylinder 41. The opening of the salvage bucket 421 faces the rotation direction of the second cylinder 41. The second feed inlet 411 is located between two adjacent salvage buckets 421. Specifically, in this embodiment, as the second cylinder 41 rotates around the axis of the first cylinder 1, at least part of the retrieval bucket 421 of the retrieval mechanism 42 can enter the treatment tank 5 and retrieve the wastewater to be treated. The second cylinder 41 is provided with a second feed inlet 411, and the second feed inlet 411 and the first feed inlet 12 can be in a connected state and a misaligned state. When in a connected state, the wastewater in the retrieval bucket 421 will gather towards the opening of the retrieval bucket 421 under the action of gravity, and the opening of the retrieval bucket 421 faces the rotation direction of the second cylinder 41. The second feed inlet 411 is arranged between two adjacent retrieval buckets 421, so the wastewater to be treated flows to the second feed inlet 411 and then enters the first cylinder 1 through the first feed inlet 12 connected to the second feed inlet 411. There are several retrieval mechanisms 42, and several retrieval mechanisms 42 can continuously retrieve the wastewater to be treated, thereby improving the retrieval efficiency.

[0057] Furthermore, such as Figure 1 and Figure 2 As shown, in this embodiment, two sets of the wastewater pretreatment mechanism, consisting of the first cylinder 1, the discharge mechanism 2, and the retrieval device 4, are provided, thereby enabling faster pretreatment of the wastewater in the treatment tank 5. In other embodiments, the number of such wastewater pretreatment mechanisms is not limited.

[0058] Optionally, the device also includes several collection frames 6, which are installed on the treatment pool 5. The openings of the collection frames 6 are corresponding to the two ends of the first through hole 11. Impurities discharged from the two ends of the first through hole 11 will enter the collection frames 6 to prevent the discharged impurities from scattering.

[0059] Furthermore, such as Figure 7 As shown, in this embodiment, three salvage mechanisms 42 are provided. In other embodiments, the number of salvage mechanisms 42 is not limited, and there may be four, five, etc.

[0060] Furthermore, such as Figures 7 to 9 As shown, the second feed inlet 411 has a first sidewall 4111 and a second sidewall 4112 spaced apart along the rotation direction of the second cylinder 41. The first sidewall 4111 is located downstream of the second sidewall 4112. The retrieval device 4 also includes a flap 43, which is rotatably connected to the second sidewall 4112. When the first feed inlet 12 is connected to and faces the second feed inlet 411, the flap 43 can rotate into the first feed inlet 12 under external force and open the second feed inlet 411. Specifically, in this embodiment, taking the counterclockwise rotation direction of the second cylinder 41 as a reference, during the rotation of the second cylinder 41, the second side wall 4112 will pass one side of the first feed inlet 12 before the first side wall 4111. At this time, the flap 43 can rotate into the first feed inlet 12 under the external force and open the second feed inlet 411, so that the wastewater to be treated enters the first cylinder 1. When the second cylinder 41 continues to rotate counterclockwise, the outer wall of the first cylinder 1 will contact the flap 43 and push the flap 43 to rotate towards the outer wall of the second cylinder 41, thereby closing the second feed inlet 411. When the first feed inlet 12 and the second feed inlet 411 are misaligned, the flap 43 always closes the second feed inlet 411, preventing impurities from entering the gap between the first cylinder 1 and the second cylinder 41.

[0061] Furthermore, the external force is provided by the gravity of the wastewater to be treated. When the first inlet 12 and the second inlet 411 are connected and facing each other, the flap 43 can rotate into the first inlet 12 and open the second inlet 411 under the gravity of the wastewater to be treated.

[0062] Furthermore, such as Figure 8 and Figure 9As shown, the retrieval device 4 also includes an elastic element 44, which is connected between the flap 43 and the second side wall 4112. External force is provided by the elastic element 44, and the elastic element 44 is configured to ensure that the flap 43 always has a tendency to rotate towards the interior of the second cylinder 41. In this embodiment, the elastic element 44 is a torsion spring. This configuration allows the flap 43 to rotate towards the first inlet 12 under the elastic force of the elastic element 44 when the first inlet 12 and the second inlet 411 are connected and aligned, thereby opening the second inlet 411. By using the elastic element 44 to assist the flap 43 in opening the second inlet 411, the situation where the second inlet 411 cannot be opened by the weight of the wastewater itself is avoided.

[0063] Furthermore, such as Figure 9 As shown, the retrieval device 4 also includes two symmetrical and spaced rollers 45, both of which are rotatably mounted on the flap 43. In this embodiment, both rollers 45 are mounted on the side of the flap 43 facing the outer wall of the first cylinder 1. When the flap 43 closes the second feed port 411, the two rollers 45 roll in contact with the outer wall of the first cylinder 1. This reduces friction between the flap 43 and the first cylinder 1, making rotation smoother and improving the service life of the device.

[0064] Furthermore, such as Figure 7 and Figure 10 As shown, the outer wall of the second cylinder 41 is provided with a plurality of second filter holes 412. Specifically, in this embodiment, a plurality of second filter holes 412 are opened on the outer wall of the second cylinder 41, and the wastewater filtered out in the first cylinder 1 can be filtered out through the plurality of second filter holes 412, thereby improving the filtration efficiency of the wastewater.

[0065] Furthermore, the bottom wall of the salvage bucket 421 is provided with a plurality of third filter holes 4215. Specifically, in this embodiment, a plurality of third filter holes 4215 are provided on the bottom wall of the salvage bucket 421, so that some wastewater can be filtered out during the salvage process, thereby improving the filtration efficiency of the wastewater.

[0066] Furthermore, such as Figure 3 and Figure 4As shown, the drive device 24 is connected to the second cylinder 41 and can drive the second cylinder 41 to rotate around the axis of the first cylinder 1. Specifically, in this embodiment, the retrieval device 4 also includes a first transmission wheel 46 and a second transmission wheel 47. The second transmission wheel 47 is fixedly connected to the outer wall of the second cylinder 41, and the first transmission wheel 46 meshes with the second transmission wheel 47. The drive device 24 is connected to the first transmission wheel 46. In this embodiment, the drive device 24 is specifically a dual-axis drive device 241. One end of the dual-axis drive device 241 is connected to the rotating shaft 23, and the other end is connected to the first transmission wheel 46. The dual-axis drive device 241 drives the second cylinder 41 to rotate around the axis of the first cylinder 1. With this configuration, the rotation of the second cylinder 41 and the rotating shaft 23 can be achieved simultaneously using one drive device 24, reducing the number of drive devices 24 used and thus reducing the manufacturing cost of the equipment. In this embodiment, the dual-axis drive device 241 is a dual-axis motor.

[0067] In other embodiments, the drive device 24 can also be a single-axis drive device, and an additional drive device 24 is added to be connected to the second cylinder 41 for transmission, so that the drive source of the discharge mechanism 2 and the second cylinder 41 are independent, and the rotation of the discharge mechanism 2 and the second cylinder 41 can be driven by the two drive devices 24 respectively.

[0068] Furthermore, such as Figure 10 and Figure 11As shown, the salvage bucket 421 includes a first plate 4211 and a second plate 4212 arranged parallel to and spaced apart along the axial direction of the second cylinder 41, a third plate 4213 connected between the first plate 4211 and the second plate 4212, and a fourth plate 4214. The third plate 4213 is spaced apart from the outer surface of the second cylinder 41, and the fourth plate 4214 is simultaneously connected to the first plate 4211, the second plate 4212, and the third plate 4213. The fourth plate 4214 is connected to the outer surface of the second cylinder 41. The first plate 4211, the second plate 4212, the third plate 4213, and the fourth plate 4214, together with the outer surface of the second cylinder 41, form a hopper for containing wastewater to be treated. The retrieval mechanism 42 also includes a scraper assembly 422, which is located between the third plate 4213 and the outer surface of the second cylinder 41 and is slidably connected to the fourth plate 4214 along the radial direction of the second cylinder 41. Specifically, in this embodiment, the retrieval bucket 421 is formed by connecting the first plate 4211, the second plate 4212, the third plate 4213, and the fourth plate 4214, and forms a hopper. This arrangement allows the hopper to contain wastewater to be treated. The scraper assembly 422 is disposed between the outer surfaces of the third plate 4213 and the second cylinder 41 and is slidably connected to the fourth plate 4214 along the radial direction of the second cylinder 41. With this configuration, when the retrieval bucket 421 and the second feed inlet 411 rotate above the first feed inlet 12, the scraper assembly 422, under its own gravity, will slide radially towards the second feed inlet 411 along the second cylinder 41, thereby scraping the wastewater to be treated in the bucket into the second feed inlet 411, improving the retrieval efficiency of the retrieval device 4. In other embodiments, the scraper assembly 422 is simultaneously slidably connected to both the first plate 4211 and the second plate 4212.

[0069] Furthermore, such as Figure 12 As shown, the scraping assembly 422 includes a scraper plate 4221 and two sliding rods 4223. Both ends of the two sliding rods 4223 are fixedly connected to the wall of the retrieval bucket 421. The two ends of the scraper plate 4221 are slidably fitted onto the two sliding rods 4223 along the radial direction of the second cylinder 41. Specifically, in this embodiment, both ends of the two sliding rods 4223 are fixedly connected to the fourth plate 4214 of the retrieval bucket 421. Under its own weight, the scraper plate 4221 slides radially towards the second cylinder 41, scraping away impurities adhering to the wall of the retrieval bucket 421 and pushing them into the first cylinder 1, thereby improving the efficiency of impurity discharge. In other embodiments, the two ends of the two sliding rods 4223 can also be fixedly connected to the first plate 4211 and the second plate 4212 of the retrieval bucket 421, respectively.

[0070] Furthermore, such as Figure 12As shown, the scraping assembly 422 also includes two connectors 4222, two gravity blocks 4225, and two buffers 4224. The two connectors 4222 are used to fix one end of the two sliding rods 4223 to the wall of the retrieval bucket 421. The two gravity blocks 4225 are respectively installed at the sliding joints between the scraper plate 4221 and the two sliding rods 4223, making the scraper plate 4221 slide more smoothly on the sliding rods 4223. The buffers 4224 are installed on one of the connectors 4222 and the gravity blocks 4225 and are in contact with the other one. The buffers 4224 can buffer the gravity generated by the gravity blocks 4225, preventing the gravity blocks 4225 from directly impacting the connectors 4222, thereby improving the service life of the scraping assembly 4222. In this embodiment, the buffer 4224 is a buffer spring. In other embodiments, the buffer 4224 can be a rubber pad.

[0071] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A wastewater pretreatment device, characterized in that, include: Two spaced-apart brackets (3); The first cylinder (1) has two ends fixedly mounted on the two supports (3). The first cylinder (1) has a first through hole (11) extending through its axial direction. The cylinder wall of the first cylinder (1) has a first feed inlet (12) and several first filter holes (13). The first feed inlet (12) and several first filter holes (13) are all connected to the first through hole (11). The first feed inlet (12) is used to add wastewater to be treated. The material discharge mechanism (2) includes a lead screw (21), a discharge plate (22), a rotating shaft (23), and a drive device (24). The lead screw (21) passes through the first through hole (11), and the axis of the lead screw (21) coincides with the center line of the first through hole (11). The two ends of the lead screw (21) are respectively fixedly connected to the two supports (3). The rotating shaft (23) passes through the first through hole (11) and is arranged parallel to the lead screw (21). The discharge plate (22) is parallel to the lead screw (21). The lead screw (21) is threaded, the outer peripheral surface of the discharge plate (22) is slidably engaged with the hole wall of the first through hole (11), the discharge plate (22) is provided with a slot (221), the rotating shaft (23) is slidably inserted into the slot (221), the driving device (24) is connected to the rotating shaft (23) and drives the rotating shaft (23) to rotate around the center line of the lead screw (21), and the rotating shaft (23) can drive the discharge plate (22) to rotate synchronously around the center line of the lead screw (21); The outer peripheral surface of the rotating shaft (23) rolls with the wall of the first through hole (11), and the rotating shaft (23) is a rolling roller (231).

2. The wastewater pretreatment equipment according to claim 1, characterized in that, The lead screw (21) is a reciprocating lead screw (211).

3. A wastewater pretreatment device according to any one of claims 1-2, characterized in that, The wastewater pretreatment equipment also includes: A processing pool (5), and two of the supports (3) are disposed in the processing pool (5); The salvage device (4) includes a second cylinder (41) and a plurality of salvage mechanisms (42). The second cylinder (41) is rotatably fitted onto the first cylinder (1). The second cylinder (41) has a second feed inlet (411) on its wall. During the rotation of the second cylinder (41) relative to the first cylinder (1), the second feed inlet (411) and the first feed inlet (12) can be connected or misaligned. The plurality of salvage mechanisms (42) are spaced apart along the circumferential direction of the second cylinder (41). Each salvage mechanism (42) includes a salvage bucket (421) disposed on the outer surface of the second cylinder (41). The opening of the salvage bucket (421) faces the rotation direction of the second cylinder (41). The second feed inlet (411) is located between two adjacent salvage buckets (421).

4. The wastewater pretreatment equipment according to claim 3, characterized in that, The second feed inlet (411) has a first sidewall (4111) and a second sidewall (4112) spaced apart along the rotation direction of the second cylinder (41). The first sidewall (4111) is located downstream of the second sidewall (4112). The retrieval device (4) also includes a flap (43), which is rotatably connected to the second sidewall (4112). When the first feed inlet (12) and the second feed inlet (411) are connected and facing each other, the flap (43) can rotate into the first feed inlet (12) under external force and open the second feed inlet (411).

5. The wastewater pretreatment equipment according to claim 4, characterized in that, The external force is provided by the gravity of the wastewater to be treated; and / or, The salvage device (4) further includes an elastic element (44) connected between the flap (43) and the second side wall (4112). The external force is provided by the elastic element (44), and the elastic element (44) is configured to make the flap (43) always have a tendency to rotate into the second cylinder (41).

6. The wastewater pretreatment equipment according to claim 3, characterized in that, The outer wall of the second cylinder (41) is provided with a plurality of second filter holes (412); and / or, The bottom wall of the salvage bucket (421) is provided with several third filter holes (4215).

7. The wastewater pretreatment equipment according to claim 3, characterized in that, The driving device (24) is connected to the second cylinder (41) in a transmission manner, and the driving device (24) can drive the second cylinder (41) to rotate around the axis of the first cylinder (1).

8. The wastewater pretreatment equipment according to claim 3, characterized in that, The salvage bucket (421) includes a first plate (4211) and a second plate (4212) arranged parallel to and spaced apart along the axial direction of the second cylinder (41), a third plate (4213) connected between the first plate (4211) and the second plate (4212), and a fourth plate (4214). The third plate (4213) is spaced apart from the outer surface of the second cylinder (41), and the fourth plate (4214) is simultaneously connected to the first plate (4211), the second plate (4212), and the third plate (4213). (4214) is connected to the outer surface of the second cylinder (41). The first plate (4211), the second plate (4212), the third plate (4213), the fourth plate (4214) and the outer surface of the second cylinder (41) form a hopper for containing the wastewater to be treated. The scooping mechanism (42) also includes a scraper assembly (422). The scraper assembly (422) is located between the outer surfaces of the third plate (4213) and the second cylinder (41) and is slidably connected to the fourth plate (4214) along the radial direction of the second cylinder (41).

9. A wastewater pretreatment device according to claim 8, characterized in that, The scraping assembly (422) includes a scraper (4221) and two slide rods (4223). Both ends of the two slide rods (4223) are fixedly connected to the wall of the retrieval bucket (421). Both ends of the scraper (4221) are slidably sleeved on the two slide rods (4223) along the radial direction of the second cylinder (41).

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