Oily wastewater treatment device

Abstract

The present application relates to the technical field of oily wastewater treatment, and in particular to an oily wastewater treatment device, comprising a wastewater tank, a shell, a collecting pipe and an oil scraping device, wherein the collecting pipe is annular as a whole and its lower side extends to below the liquid level of wastewater in the wastewater tank, the oil scraping device comprises a sleeve mounted on the shell, an adjusting rod for driving the sleeve to reciprocate along the length direction of the collecting pipe is arranged on the shell, the sleeve is located above the liquid level of wastewater in the wastewater tank, the sleeve is sleeved on the collecting pipe for pulling the collecting pipe from the wastewater to above the wastewater, scrapers for scraping waste oil on the outer surface of the collecting pipe are arranged on both sides of the sleeve, an oil collecting assembly is connected to the scraper, and an adjusting assembly for driving the collecting pipe located at the lower side of the shell to move downward to below the liquid level of the wastewater is arranged on the shell, thereby achieving the effect of accelerating the efficiency of oily wastewater treatment.

Description

Technical Field

[0001] The present application relates to the technical field of oily wastewater treatment, and in particular to an oily wastewater treatment device. Background Art

[0002] A Chinese patent with announcement number CN217479114U discloses an oily wastewater treatment device, including a wastewater tank, mounting plates are installed at the front and rear ends of both sides of the wastewater tank, a driving slide rail is installed between the mounting plates, a sliding block is slidably installed on the driving slide rail, a shell is installed between the sliding blocks, a conveying wheel and a plurality of guide wheels are installed inside the left side of the shell, an oil collecting pipe is installed between the conveying wheel and the plurality of guide wheels, mounting blocks are installed on the inner walls of the upper ends of the shell, a scraper is installed on one side of the mounting block, and an oil collecting tank is installed below the scraper.

[0003] The above-mentioned prior art solution has the following defects: when using the above-mentioned device to treat wastewater containing oil, the oil collecting pipe needs to move downward from one end of the waste water tank to the water surface of the wastewater, and then move horizontally on the water surface. The waste oil can be collected while the oil collecting pipe moves horizontally. However, when the oil collecting pipe moves, the front end of the oil collecting pipe will impact the oil spots on the water surface, causing the waste oil on both sides of the oil collecting pipe to move away from the oil collecting pipe, and only the area close to the lower side of the collecting pipe can adhere to the waste oil. This will result in that each time the oil collecting pipe moves, the oil collecting capacity of the oil collecting pipe does not reach saturation, which will lead to a decrease in the treatment efficiency of oily wastewater. Summary of the invention

[0004] In order to improve the efficiency of wastewater treatment, the present application provides an oily wastewater treatment device.

[0005] The above technical objectives of this application are achieved through the following technical solutions:

[0006] A device for treating oily wastewater comprises a wastewater tank, a shell, a collecting pipe and an oil scraping device. The collecting pipe is annular as a whole and its lower side extends to below the liquid level of wastewater in the wastewater tank. The oil scraping device comprises a sleeve mounted on the shell, an adjusting rod for driving the sleeve to reciprocate along the length direction of the collecting pipe is provided on the shell, the sleeve is located above the liquid level of wastewater in the wastewater tank, the sleeve is sleeved on the collecting pipe and is used to pull the collecting pipe from the wastewater to above the wastewater, scrapers for scraping waste oil on the outer surface of the collecting pipe are provided on both sides of the sleeve, an oil collecting assembly is connected to the scraper, and an adjusting assembly for driving the collecting pipe located at the lower side of the shell to move downward to below the liquid level of the wastewater is provided on the shell.

[0007] By adopting the above scheme, when treating wastewater, the lower side of the collecting pipe will be immersed below the wastewater liquid level, but because the collar is located above the liquid level and the collar is sleeved on the collecting pipe, the collar will pull the collecting pipe out of the wastewater tank; during operation, the adjusting rod will drive the collar to move along the length direction of the adjusting rod, and when the collar moves, the collecting pipe immersed under the wastewater liquid level will be slowly pulled out, and when the collecting pipe floats to the surface, the waste oil floating on the water surface will adhere to the outer surface of the collecting pipe, and at this time, the wastewater on both sides of the collecting pipe will gradually decrease due to the volume of the collecting pipe immersed in the wastewater, and the collecting pipe The wastewater on both sides will flow toward the collecting pipe, so that the collecting pipe can adhere to more waste oil until the waste oil collection capacity of the collecting pipe reaches saturation; the sleeve moves on the collecting pipe, and the scrapers on both sides of the sleeve will scrape the waste oil from the collecting pipe, and the oil collecting component will collect the waste oil; after the sleeve moves over the collecting pipe, the adjustment component will slowly move part of the collecting pipe below the wastewater level again, waiting for the next waste oil to be adhered, and the cycle will be repeated in sequence to complete the process of treating the waste oil in the wastewater, and each time the collecting pipe can adhere to enough waste oil, which speeds up the treatment efficiency of oily wastewater.

[0008] Preferably, the adjustment assembly includes two adjustment frames, one end of which is rotatably connected to the shell, and the other end extends downward and the lower ends of the two adjustment frames are close to each other. A rotatable adjustment wheel is installed at the lower end of each adjustment frame, and the adjustment wheel is located on the inner side of the collecting tube. The two adjustment wheels respectively correspond to two turning areas on the lower side of the collecting tube and the outer peripheries of the two adjustment wheels are in contact with the outer surface of the collecting tube. A driving member is provided on the shell to drive the two adjustment frames to rotate in a direction away from each other.

[0009] Preferably, the driving member includes a driving rod arranged on one side of the adjusting frame, one end of the driving rod extends to the inside of the side wall of the shell, and a clearance hole is provided on the side wall of the shell for the driving rod to rotate together with the adjusting frame. A pushing member is provided inside the clearance hole for driving the two driving rods to swing away from each other and immerse the lower side of the collecting pipe below the liquid level of the wastewater.

[0010] Preferably, the scraper is annular as a whole and hollow inside, the end of the scraper close to the collar is fixedly connected to the collar, and the two are interconnected through a connecting hole, the end of the scraper away from the collar is open and faces the collecting pipe, and the oil collecting assembly includes an oil collecting groove installed on the shell, a connecting pipe is arranged between the oil collecting groove and the collar, and a negative pressure pump is installed on the connecting pipe.

[0011] Preferably, the diameter of the scraper close to the end face of the ring is larger than the diameter away from the end face of the ring. The inner edge of the end face of the scraper away from the ring abuts against the outer surface of the collection tube. There is a gap between the outer edge and the outer surface of the collection tube. The outer edge is connected to an annular auxiliary ring that is tilted outward.

[0012] Preferably, a plurality of annular bent plates are sleeved on the inner side of the scraper near the collecting tube, the width of the bent plates gradually increases from approaching to away from the collar, and the bent plates gradually incline towards the collar from approaching to away from the collecting tube.

[0013] Preferably, a plurality of auxiliary rods are arranged inside the collar, and the auxiliary rods are distributed along the circumference of the connecting hole. The length direction of the auxiliary rods is the same as the length direction of the adjusting rod. Two sealing rings are arranged on the auxiliary rods, and the sealing rings are slidably connected to the auxiliary rods. The two sealing rings respectively correspond to the connecting holes between the two scrapers and the collar, and are used to seal the connecting holes. A transmission assembly is arranged on the collar to drive the two collars to move toward or away from the center of the collar.

[0014] Preferably, the transmission assembly includes a transmission rod arranged on the adjusting rod for driving the ring to reciprocate along the length direction of the adjusting rod, the lower end of the transmission rod is embedded in the outer surface of the ring and is slidably connected to the ring, baffles are arranged on both sides of the transmission rod, a control switch is arranged on the side of the baffle close to the transmission rod, a transmission spring for moving the sealing ring toward the center of the ring is arranged on the side where the two sealing rings are away from each other, electromagnets coupled to the control switch are embedded on the two end surfaces inside the ring, and an iron sheet is embedded on the side of the sealing ring close to the transmission spring.

[0015] Preferably, a plurality of air outlet holes are opened inwardly on the wall of the wastewater tank, the height of the air outlet holes is higher than the liquid level of the wastewater inside the wastewater tank, the side wall of the wastewater tank is hollow inside, and is connected to an air supply pump.

[0016] Preferably, a spherical air outlet nozzle is arranged inside the air outlet hole, and two sides of the air outlet nozzle are rotatably connected to the hole wall of the air outlet hole through a hinge rod.

[0017] In summary, this application has the following technical effects:

[0018] 1. By setting up a collection pipe that enters below the wastewater level and a collar that can pull the lower collection pipe to above the wastewater level, each time the collection pipe comes out of the wastewater, it can adhere to more waste oil, and then the scraper and oil collection assembly can scrape and collect the waste oil on the surface of the collection pipe, thus achieving the effect of accelerating the treatment efficiency of oily wastewater;

[0019] 2. By providing a scraper with a hollow interior and connected to the interior of the collar and an oil collecting assembly connected to the interior of the collar, the oil collecting assembly will form a negative pressure inside the collar, so that the waste oil on the collection pipe can smoothly pass through the scraper into the interior of the collar and finally be collected by the oil collecting assembly;

[0020] 3. By setting up a transmission rod, a sealing ring, a baffle and an electromagnet, when the transmission rod moves in different directions, it will contact control switches at different positions. The control switch is coupled to the electromagnet. The control switch can control the sealing ring to move away from or close to the center of the ring. This can change the connection state between the two scrapers and the ring, and the negative pressure effect inside the ring is more obvious, which makes the collection effect of the oil collection assembly more obvious. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is an overall structural diagram of the oily wastewater treatment device in the embodiment of the present application;

[0022] Figure 2 is a partial cross-sectional view highlighting the internal structure of the housing in the embodiment of the present application;

[0023] Figure 3 It is a partial cross-sectional view highlighting the internal structure of the ring in the embodiment of the present application.

[0024] In the figure, 1, waste water tank; 11, air outlet nozzle; 12, air supply pump; 2, shell; 3, collecting pipe; 4, oil scraper; 41, adjusting rod; 42, adjusting plate; 43, sliding rod; 44, collar; 45, transmission rod; 46, scraper; 47, oil collecting assembly; 471, oil collecting tank; 472, connecting pipe; 473, negative pressure pump; 48, rotating motor; 49, auxiliary ring; 5, moving device; 6, bending plate; 7, control assembly; 71, sealing ring; 72, auxiliary rod; 73, transmission spring; 74, electromagnet; 75, iron sheet; 76, baffle; 77, control switch; 8, adjustment assembly; 81, adjustment frame; 82, adjustment wheel; 83, driving rod; 84, pushing member. DETAILED DESCRIPTION

[0025] The present application is further described in detail below in conjunction with the accompanying drawings.

[0026] Reference Figure 1 The present application provides an oily wastewater treatment device, comprising a wastewater tank 1, a shell 2, a collecting pipe 3, an oil scraper 4 and a moving device 5. The shell 2 is installed above the wastewater tank 1. The collecting pipe 3 is annular as a whole. The plane where the collecting pipe 3 is located is vertical. The length direction of the collecting pipe 3 is the same as the width direction of the wastewater tank 1, but the length of the collecting pipe 3 is slightly smaller than the width of the wastewater tank 1. The upper side of the collecting pipe 3 is located inside the shell 2. Two reversing wheels are arranged inside the shell 2 for hanging and fixing the collecting pipe 3 on the shell 2. The lower side goes deep into the wastewater tank 1 and can adhere to the waste oil on the wastewater liquid surface; the oil scraper 4 can scrape the waste oil on the outer surface of the collecting pipe 3 and collect and store the waste oil. The moving device 5 can drive the shell 2 and the collecting pipe 3 to move back and forth along the length direction of the wastewater tank 1.

[0027] In this embodiment, the mobile device 5 can refer to the Chinese patent with the announcement number CN217479114U, and this application will not go into details.

[0028] Reference Figure 1 and Figure 2 The oil scraper device 4 includes an adjusting rod 41, an adjusting plate 42, a sliding rod 43, a collar 44, a transmission rod 45, a scraper 46 and an oil collecting assembly 47. The adjusting rod 41 is horizontally installed inside the housing 2. Both ends of the adjusting rod 41 extend to the inside of the side wall of the housing 2 and are rotatably connected to the housing 2. One end of the adjusting rod 41 is connected to a rotating motor 48, and the rotating motor 48 is fixedly connected to the housing 2. The sliding rod 43 is arranged on one side of the adjusting rod 41 in the same direction, and both ends of the sliding rod 43 are fixedly connected to the housing 2; the adjusting plate 42 is sleeved on the adjusting rod 41 and is threadedly matched with the adjusting rod 41. The sliding rod 43 passes through the adjustment plate 42 and the adjustment plate 42 is slidably connected to the sliding rod 43; the collar 44 is located below the shell 2, the collar 44 is located above the liquid level of the wastewater in the wastewater tank 1, the collar 44 is sleeved on the collection pipe 3, one end of the transmission rod 45 is fixedly connected to the adjustment plate 42, and the other end extends to the outside of the shell 2 and is fixedly connected to the collar 44, and a sliding hole for the transmission rod 45 to reciprocate with the adjustment plate 42 is opened on the shell 2; there are two scrapers 46, which are respectively arranged on both sides of the collar 44, and the oil collection assembly 47 is connected to the scraper 46.

[0029] During the treatment of oily wastewater, the rotating motor 48 drives the adjusting rod 41 to rotate inside the shell 2. The adjusting rod 41 is threadedly connected to the adjusting plate 42. The adjusting rod 41 will drive the adjusting plate 42 to move along the length direction of the adjusting rod 41. It should be noted here that the sliding rod 43 passes through the adjusting plate 42 to limit the adjusting plate 42 to prevent the adjusting plate 42 from rotating together with the adjusting rod 41; when the adjusting plate 42 moves, the adjusting plate 42 will drive the collar 44 to move on the collecting pipe 3 through the transmission rod 45. Since the collar 44 is located above the liquid surface of the wastewater, the collar 44 will drag the collecting pipe 3 close to the collar 44 from below the liquid surface of the wastewater to above the liquid surface of the wastewater. At this time, the waste oil floating on the liquid surface of the wastewater will adhere to the collecting pipe 3; as the collar 44 moves When moving on the collecting pipe 3, the scraper 46 on the collar 44 will scrape the waste oil from the collecting pipe 3, and the oil collecting assembly 47 can collect and store the scraped waste oil; the area where the collar 44 moves from the collecting pipe 3 will be immersed below the liquid surface of the wastewater again under the action of its own gravity, waiting for the next time to bond the waste oil, and the cycle can be repeated to complete the process of treating the waste oil in the wastewater, and each time the collecting pipe 3 can bond enough waste oil, thereby speeding up the treatment efficiency of the oily wastewater; it should be noted here that when the collecting pipe 3 moves from below the liquid surface of the wastewater to above the liquid surface, since the volume of the collecting pipe 3 entering the wastewater gradually decreases, the wastewater on both sides of the collecting pipe 3 will gradually move closer to the collecting pipe 3, so that the collecting pipe 3 can bond more waste oil.

[0030] Reference Figure 1 and Figure 3 In this embodiment, the scraper 46 is truncated in shape. The scraper 46 and the collar 44 are hollow. The end of the scraper 46 close to the collar 44 is fixedly connected to the end face of the collar 44, and the scraper 46 and the sleeve are connected through the connecting hole. The end of the scraper 46 away from the collar 44 is completely open. It should be noted that the diameter of the end face of the scraper 46 away from the collar 44 is smaller than the diameter of the end face close to the collar 44. The inner edge of the end face of the scraper 46 away from the collar 44 is close to the collecting The outer surfaces of the tubes 3 are in contact with each other, and there is a gap between the outer edge and the outer surface of the collecting tube 3. The outer edge is connected with an annular auxiliary ring 49 that is tilted outward; the oil collecting assembly 47 includes an oil collecting groove 471, a connecting pipe 472 and a negative pressure pump 473. The oil collecting groove 471 is fixed on one side of the shell 2, one end of the connecting pipe 472 is connected to the inside of the oil collecting groove 471, and the other end is connected to the inside of the collar 44 below the collar 44. The negative pressure pump 473 is installed on the connecting pipe 472.

[0031] Reference Figure 3When the collar 44 moves on the collecting pipe 3, negative pressure is formed inside the collar 44 and the scraper 46. The inner edge of the end surface of the scraper 46 away from the collar 44 can scrape up the waste oil on the outer surface of the collecting pipe 3, and finally suck it into the oil collecting groove 471 under the action of the external atmospheric pressure; the outer edge of the end surface of the scraper 46 away from the collar 44 and the auxiliary ring 49 can reduce the possibility of waste oil splashing everywhere, and can expand the range of the scraper 46 to absorb the waste oil on the collecting pipe 3.

[0032] In order to increase the suction force of the scraper 46 away from the end face of the collar 44, a plurality of annular curved plates 6 are sleeved on the side of the scraper 46 close to the collecting pipe 3. The width of the plurality of curved plates 6 gradually increases from close to the collar 44 to far away from the collecting pipe 3. The curved plates 6 gradually tilt toward the collar 44 from close to the collecting pipe 3. By providing a plurality of curved plates 6 of different sizes, the waste oil between two adjacent curved plates 6 can be smoothly sucked into the collar 44, and the largest curved plate 6 can reduce the area of ​​the scraper 46 away from the end face of the collar 44, so that the suction force of the scraper 46 on the scraped waste oil can be increased.

[0033] In this embodiment, in order to further ensure that the scraper 46 has a sufficiently strong suction force on the waste oil, a control component 7 is provided on the collar 44 to control the opening or closing of the connecting holes on the two end surfaces of the collar 44 .

[0034] The control assembly 7 includes a blocking ring 71, an auxiliary rod 72, a transmission spring 73, an electromagnet 74, an iron sheet 75, a baffle 76 and a control switch 77. There are two blocking rings 71, which are arranged inside the collar 44 and close to the two end faces of the collar 44. When the blocking ring 71 is close to the inner end face of the collar 44, the blocking ring 71 can block the connecting hole to disconnect the scraper 46 from the collar 44; the auxiliary rod 72 is arranged inside the collar 44, the length direction of the auxiliary rod 72 is parallel to the central axis direction of the collar 44, the two ends of the auxiliary rod 72 are fixedly connected to the two end faces of the collar 44, and the auxiliary rod 72 penetrates the blocking ring The ring 71 and the blocking ring 71 are slidably connected with the auxiliary rod 72; two groups of transmission springs 73 are provided, and the two groups of transmission springs 73 correspond to the two blocking rings 71. The transmission springs 73 are arranged on the side where the two blocking rings 71 are away from each other. The transmission springs 73 are in a compressed state, and the transmission springs 73 have a tendency to drive the two blocking rings 71 to move in a direction close to each other; it should be noted that, in order to enable the blocking ring 71 to smoothly block the connecting hole, the two ends of the transmission spring 73 are respectively embedded in the end surface of the ring 44 and the inside of the blocking ring 71, and in order to reduce the possibility of bending of the transmission spring 73, the transmission spring 73 is sleeved on the auxiliary rod 72;

[0035] The electromagnet 74 is arranged in the collar 44 and embedded in the two end surfaces of the collar 44, and the iron sheet 75 is arranged on the sealing ring 71 at a position directly opposite to the electromagnet 74; there are two baffles 76, which are respectively arranged on both sides of the transmission rod 45, and one end of the transmission rod 45 close to the collar 44 is embedded in the outer surface of the collar 44, and a clearance groove for the transmission rod 45 to reciprocate along the central axis direction of the collar 44 is opened on the outer surface of the collar 44; the two baffles 76 are respectively located at the positions of the two slot heads on the clearance groove, and there are two control switches 77, which correspond to the two electromagnets 74 respectively, and the control switches 77 are coupled to the corresponding electromagnets 74. The two control switches 77 are respectively arranged on the sides of the two baffles 76 close to each other and can abut against the transmission rod 45.

[0036] Under normal circumstances, the two electromagnets 74 have suction on the iron sheet 75, and the sealing ring 71 seals the connecting hole at this time. At this time, the ring 44 and the inside of the two scrapers 46 remain disconnected; when the transmission rod 45 drives the ring 44 to move in one direction, the transmission rod 45 will first move a distance on the ring 44, and then the transmission rod 45 will contact the control switch 77 on one of the baffles 76, and the control switch 77 will be triggered. The control switch 77 will control the corresponding electromagnet 74 to cut off the power, and the corresponding sealing ring 71 will move toward the center of the ring 44 under the action of the transmission spring 73, and the ring 44 will be connected with the scraper 46, and the ring 44 will be disconnected from the scraper 46 located on the rear side of the moving direction of the ring 44, so that the end of the scraper 46 away from the ring 44 can have a strong suction.

[0037] Reference Figure 2 In this embodiment, in order to allow the area on the collecting pipe 3 that is far from the collar 44 to be smoothly immersed in the liquid surface of the wastewater and to avoid the situation where the collecting pipe 3 floats on the liquid surface of the wastewater due to buoyancy, an adjustment component 8 is provided on the shell 2 to drive the collecting pipe 3 to move downward.

[0038] The adjustment assembly 8 includes an adjustment frame 81, an adjustment wheel 82, a driving rod 83 and a pushing member 84. There are two adjustment frames 81, which are installed inside the housing 2 and are arranged near the two ends of the housing 2. One end of the adjustment frame 81 is rotatably connected to the housing 2, and the other end extends downward and the lower ends of the two adjustment frames 81 are close to each other; there are also two adjustment wheels 82, which correspond to the two adjustment frames 81 respectively, and the adjustment wheels 82 are installed on the adjustment frames 81 and are rotatably connected to the adjustment frames 81. The wheel 82 is in contact with the outer surface of the collecting pipe 3 at the two turning areas on the lower side of the collecting pipe 3, and a through hole is opened on the shell 2 for the adjusting frame 81 to pass through; one end of the driving rod 83 is fixedly connected to the adjusting frame 81, and the other end extends in the horizontal direction and finally extends to the inside of the side wall of the shell 2, and a clearance hole is opened on the inner wall of the shell 2 for the driving rod 83 to rotate together with the adjusting frame 81, and a pushing member 84 is arranged inside the clearance hole to drive the two driving plates to swing away from each other and immerse the lower side of the collecting pipe 3 below the liquid level of the wastewater.

[0039] When the collar 44 moves on the collecting pipe 3 in a direction from away from to close to the adjusting wheel 82, the collar 44 will drive the adjusting frame 81 to rotate on the shell 2 through the collecting pipe 3 and the adjusting wheel 82. When the collar 44 gradually moves away from the adjusting wheel 82, the pushing member 84 will drive the adjusting frame 81, the adjusting wheel 82 and the collecting pipe 3 to be immersed in the wastewater through the driving rod 83.

[0040] In this embodiment, the pushing member 84 is a pushing spring, and other pushing members 84 with the same effect are still applicable.

[0041] Replay Figure 1 It should be noted that, in this embodiment, since the process of cleaning the waste oil on the outer surface of the collecting pipe 3 requires the collecting pipe 3 to be pulled out of the waste water, which results in that the waste oil near the edge of the waste water tank 1 cannot be cleaned more thoroughly, a plurality of air outlets are opened inwardly on the wall of the waste water tank 1, and a spherical air outlet nozzle 11 is arranged inside the air outlet. Both sides of the air outlet nozzle 11 are rotatably connected to the hole wall of the air outlet through a hinge rod. The height of the air outlet nozzle 11 is higher than the liquid level of the waste water inside the waste water tank 1. The side wall of the waste water tank 1 is hollow inside and is connected to an air supply pump 12. After the air supply pump 12 is started, the gas will enter the inside of the side wall of the waste water tank 1, and will eventually be sprayed toward the waste water through the air outlet nozzle 11, so that the waste oil near the edge of the waste water tank 1 can be driven to move toward the center of the waste water tank 1. It should be noted that the air outlet nozzle 11 is rotatably connected to the side wall of the air outlet hole, so that people can adjust the air outlet angle of the air outlet nozzle 11 according to actual needs, so that the air outlet nozzle 11 can be suitable for wastewater volumes of various heights.

[0042] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. An oily wastewater treatment device, comprising a wastewater tank (1), a housing (2), a collecting pipe (3) and an oil scraping device (4), characterized in that: The collecting pipe (3) is annular in shape as a whole and its lower side extends below the liquid level of the wastewater in the wastewater tank (1). The oil scraping device (4) comprises a collar (44) mounted on the housing (2). The housing (2) is provided with an adjusting rod (41) for driving the collar (44) to reciprocate along the length direction of the collecting pipe (3). The collar (44) is located above the liquid level of the wastewater in the wastewater tank (1). The collar (44) is sleeved on the collecting pipe (3) for pulling the collecting pipe (3) from the wastewater to the wastewater tank (1). The casing (2) is provided with an adjustment assembly (8) for driving the collection pipe (3) located at the lower side of the casing (2) to move downward to below the wastewater liquid level. The adjustment assembly (8) includes two adjustment frames (81). One end of the adjustment frame (81) is rotatably connected to the casing (2). The other end of the adjustment frame (81) extends downward and the two adjustment frames (81) are connected to the casing (2). The lower ends of the adjusting frames (81) are close to each other, and a rotatable adjusting wheel (82) is installed at the lower end of each adjusting frame (81). The adjusting wheel (82) is located on the inner side of the collecting tube (3). The two adjusting wheels (82) respectively correspond to the two turning areas on the lower side of the collecting tube (3), and the outer circumferences of the two adjusting wheels (82) are in contact with the outer surface of the collecting tube (3). The housing (2) is provided with a driving member for driving the two adjusting frames (81) to rotate in a direction away from each other. The scraper (46) is generally The scraper (46) is annular and hollow inside. One end of the scraper (46) close to the collar (44) is fixedly connected to the collar (44), and the two are connected to each other through a connecting hole. The end of the scraper (46) away from the collar (44) is open and faces the collection pipe (3). The oil collection assembly (47) includes an oil collection groove (471) installed on the shell (2), a connecting pipe (472) is provided between the oil collection groove (471) and the collar (44), and a negative pressure pump (473) is installed on the connecting pipe (472).

2. The oily wastewater treatment device according to claim 1, characterized in that: The driving member comprises a driving rod (83) arranged on one side of the adjustment frame (81), one end of the driving rod (83) extending to the inside of the side wall of the housing (2), a clearance hole for the driving rod (83) to rotate along with the adjustment frame (81) is provided on the side wall of the housing (2), and a pushing member (84) is provided inside the clearance hole for driving the two driving rods (83) to swing in a direction away from each other so that the lower side of the collection pipe (3) is immersed below the liquid surface of the wastewater.

3. The oily wastewater treatment device according to claim 1, characterized in that: The diameter of the end face of the scraper (46) close to the collar (44) is larger than the diameter of the end face away from the collar (44); the inner edge of the end face of the scraper (46) away from the collar (44) abuts against the outer surface of the collection tube (3); a gap exists between the outer edge and the outer surface of the collection tube (3); and an annular auxiliary ring (49) that is tilted outward is connected to the outer edge.

4. The oily wastewater treatment device according to claim 3 is characterized in that: A plurality of annular bent plates (6) are sleeved on the side surface of the scraper (46) close to the collecting pipe (3), and the width of the plurality of bent plates (6) gradually increases from close to to far away from the collar (44), and the bent plates (6) gradually incline from close to to far away from the collecting pipe (3) in the direction close to the collar (44).

5. The oily wastewater treatment device according to claim 1, characterized in that: A plurality of auxiliary rods (72) are arranged inside the collar (44). The auxiliary rods (72) are distributed along the circumference of the connecting hole. The length direction of the auxiliary rods (72) is the same as the length direction of the adjusting rod (41). Two blocking rings (71) are arranged on the auxiliary rod (72). The blocking rings (71) are slidably connected to the auxiliary rod (72). The two blocking rings (71) respectively correspond to the connecting holes between the two scrapers (46) and the collar (44) for sealing the connecting holes. The collar (44) is provided with a transmission component for driving the two collars (44) to move toward or away from the center of the collar (44).

6. The oily wastewater treatment device according to claim 5, characterized in that: The transmission assembly comprises a transmission rod (45) arranged on the adjustment rod (41) for driving the collar (44) to reciprocate along the length direction of the adjustment rod (41); the lower end of the transmission rod (45) is embedded in the outer surface of the collar (44) and is slidably connected to the collar (44); baffles (76) are arranged on both sides of the transmission rod (45); a control switch (77) is arranged on the side of the baffle (76) close to the transmission rod (45); a transmission spring (73) for driving the sealing rings (71) to move toward the center of the collar (44) is arranged on the side away from each other of the two blocking rings (71); electromagnets (74) coupled to the control switch (77) are embedded on both end surfaces inside the collar (44); and an iron sheet (75) is embedded on the side of the blocking ring (71) close to the transmission spring (73).

7. The oily wastewater treatment device according to claim 1, characterized in that: The wastewater tank (1) has a plurality of air outlets formed inwardly on its wall. The height of the air outlets is higher than the liquid level of the wastewater in the wastewater tank (1). The side wall of the wastewater tank (1) is hollow and is connected to an air supply pump (12).

8. The oily wastewater treatment device according to claim 7, characterized in that: A spherical air outlet nozzle (11) is arranged inside the air outlet hole, and two sides of the air outlet nozzle (11) are rotatably connected to the hole wall of the air outlet hole through a hinge rod.

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