An oil-water separator for a heat treatment production line

Abstract

The present invention relates to the technical field of oil-water separation, and particularly relates to an oil-water separator for a heat treatment production line, comprising: a separation frame; a pretreatment structure installed on the separation frame for pre-filtering the oil-containing wastewater of the heat treatment production line; the pretreatment structure is connected to a centrifugal separation structure arranged on the separation frame; the centrifugal separation structure includes a centrifugal outer box, and a centrifugal inner box is rotatably assembled inside the centrifugal outer box, and a transmission hole rod which is integrally fixed in the middle of the centrifugal inner box and is hermetically and rotatably arranged inside the centrifugal outer box; in the present invention, the impurities precipitated from the heat treatment wastewater are introduced into a plurality of classification precipitation cylinders by using the arc-shaped precipitation bottom box, which can isolate and precipitate the impurities with different properties and different particle sizes in the wastewater, helps to improve the precipitation effect, avoids the mixing of impurities from affecting the subsequent treatment, ensures that the precipitation process is more thorough, and reduces the burden for the subsequent treatment.

Description

Technical Field

[0001] The present invention relates to the technical field of oil-water separation, and particularly relates to an oil-water separator for a heat treatment production line. Background Art

[0002] Quenching is a heat treatment process in which metal is heated to a certain temperature above the critical temperature, held for a certain period of time to make all or part of it austenitized, and then rapidly cooled to below Ms at a cooling rate greater than the critical cooling rate for martensitic transformation. Cooling requires a certain cooling medium, and commonly used ones include mineral oil, water, or a mixture of oil and water. When metal workpieces are quenched using oil or a mixture of oil and water, their surfaces need to be cleaned before the next process, and the surfaces of metal workpieces also need to be cleaned before heat treatment. Initially, manual cleaning was used, and later cleaning machines were invented and can be used for automatic cleaning. The oil and dirt on the surface of parts will inevitably remain in the cleaning tank after cleaning. When it accumulates to a certain extent, it will affect the cleaning effect. If the water containing oil and dirt is directly discharged, it will cause waste of water resources. Therefore, an oil-water separation device is needed to separate oil and water for secondary utilization. The Chinese patent discloses an oil-water separator for a heat treatment production line (authorized publication number CN103894002A). This patented technology discloses an oil-water separator for a heat treatment production line; the oil-water separator includes a vertically arranged cylinder body and an oil suction device connected to the cylinder body through a pipeline. The oil suction device is located in an oil-water tank beside the cylinder body, and a float type liquid level tracking device is also provided at the end of the oil suction device; it also includes an oil discharge device and a water discharge device, which are connected to the cylinder body through pipelines; a spiral fin type damping pipe is installed inside the cylinder body, and an oil suction start device is arranged outside the cylinder body. This invention adds a float type liquid level tracking device, and the oil suction sleeve is slidably connected to the oil suction pipe, so the oil suction sleeve can move up and down with the float, and can accurately automatically track the oil-water interface, ensuring that the horizontal height of the oil-water inlet is consistent with the oil-water interface. Basically, the oil enters the pipeline, only containing a small amount of water, and secondary separation can be carried out inside the cylinder body to completely achieve the separation of oil and water. This patented technology solves the problem that the oil-water separator removes the oil in water based on the different specific gravities of oil and water and their immiscibility, using the principle of gravity sedimentation. The existing oil-water separator inserts a suction pipe into the oil-water mixed liquid and sucks the oil (containing water) into a container through the action of a pump. Since it is difficult to master the insertion depth of the suction pipe, if it is too shallow, air suction will occur, and if it is too deep, water will be sucked into the container. Therefore, the oil separated by this type of oil-water separator often contains a certain amount of water. The oil-water mixture sucked into the container adsorbs the oil on its surface through an oil suction plate, and the remaining oil-water mixture containing a certain amount of oil is discharged. Since the oil suction efficiency of the oil suction plate is limited, the oil-water separation effect is not good, and after the oil suction plate works for a long time, the oil suction will reach saturation. If it is not cleaned in time, it will lose its function. This type of oil-water separator is large in volume, low in oil-water separation efficiency, needs to be frequently cleaned, and the separated water contains a certain amount of oil. When using the water containing oil to clean workpieces, the workpieces cannot be cleaned thoroughly. When the workpieces containing oil enter the next tempering process, a large amount of oil fume will be generated, which will not only affect the appearance of the workpieces, but also pollute the tempering furnace and affect the tempering quality.When the separated oil is used for secondary use, if the oil contains excessive water, it will affect the heat treatment effect, causing soft spots, quenching cracks or deformation of parts, or oil splashing, resulting in safety accidents.

[0003] However, the wastewater from thermal treatment in the prior art contains a large amount of metal impurities, which can easily cause sludge sedimentation and blockage during oil-water separation. It is necessary to solve the problem of pre-treating the wastewater from thermal treatment when separating oil and water in the prior art to reduce the occurrence of blockage caused by waste slag metal.

[0004] Therefore, those skilled in the art provide an oil-water separator for a heat treatment production line to solve the problems raised in the above background technology. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides:

[0006] An oil-water separator for a heat treatment production line comprises: a separation frame;

[0007] The separation frame is equipped with a pretreatment structure for pretreatment and filtration of oily wastewater from the heat treatment production line;

[0008] The pre-treatment structure is connected to a centrifugal separation structure arranged on a separation frame;

[0009] The centrifugal separation structure includes a centrifugal outer box, and a centrifugal inner box is rotatably mounted inside the centrifugal outer box, and a transmission hole rod is integrally fixed in the middle of the centrifugal inner box and is rotatably arranged inside the centrifugal outer box;

[0010] The interior of the centrifugal inner box is provided with a plurality of centrifugal filter holes for centrifugal discharge of water along the outer side, and an oblique cone groove with an angle of 45° is provided along the outer edge of the centrifugal inner box along the centrifugal filter holes;

[0011] The oblique angle conical groove faces one side of the centrifugal outer box, which is conducive to guiding the water discharged by centrifugation to the bottom of the centrifugal outer box;

[0012] An oil cleaning structure is arranged between the centrifugal separation structure and the pretreatment structure.

[0013] Preferably: the top end of the transmission hole rod is located outside the centrifugal outer box and is connected to servo motor 2; the transmission hole rod is located at the bottom end of the bottom of the centrifugal inner box and is integrally fixedly provided with an oil discharge inner tube; and the bottom end of the oil discharge inner tube is sealed and rotatably equipped with an oil discharge shaft tube for discharging oil for centrifugal filtration.

[0014] Preferably: a plurality of liquid inlet holes are opened through the inner wall of the top of the transmission hole rod toward the outside, and the transmission hole rod is located outside the liquid inlet hole and is provided with a supply pipe in a sealed and rotatable sleeve;

[0015] One end of the supply pipe away from the transmission hole rod is connected with a pumping pump, and the liquid pumping end of the pumping pump is connected with an extraction outer pipe. An extraction inner pipe is hermetically and slidably arranged inside the extraction outer pipe, and a floating ball pipe is connected to the bottom end of the extraction inner pipe.

[0016] Preferably: The bottom end of the centrifugal outer box is connected through a water liquid discharge pipe, and a flange member hermetically assembled with an external connecting pipe body is integrally fixed at the bottom end of the water liquid discharge pipe.

[0017] Preferably: The pretreatment structure includes a precipitation tank, and an arc-shaped precipitation bottom tank is integrally fixed at the bottom of the precipitation tank, and the inner side of the arc-shaped precipitation bottom tank is in an arc shape;

[0018] A number of classification precipitation cylinders I are fixedly arranged at equal intervals in a circular shape inside the arc-shaped precipitation bottom tank, and a transmission connection cylinder I is rotatably assembled at the bottom end of the classification precipitation cylinder I. An inner spiral I closely attached to the inner side of the classification precipitation cylinder I is fixedly installed on the inner wall of the transmission connection cylinder I;

[0019] An inner straight tooth ring is integrally fixed on the outer wall of the transmission connection cylinder I, and an outer straight tooth ring rotatably arranged on the inner side wall of the arc-shaped precipitation bottom tank is engaged with the outer side of the inner straight tooth ring.

[0020] Preferably: A classification precipitation cylinder II is fixedly assembled at the center position of the arc-shaped precipitation bottom tank, and a transmission connection cylinder II is rotatably installed at the bottom of the classification precipitation cylinder II. An inner spiral II closely attached to the inner side wall of the classification precipitation cylinder II is fixedly arranged inside the transmission connection cylinder II;

[0021] A driving straight tooth ring is fixedly assembled on the outer wall of the transmission connection cylinder II;

[0022] Five classification precipitation cylinders III are fixedly assembled at equal intervals in a circular shape along the outside of the classification precipitation cylinder II on the arc-shaped precipitation bottom tank. The bottoms of the five classification precipitation cylinders III are all rotatably assembled with transmission connection cylinders III, and driven straight tooth rings engaged with the driving straight tooth ring are fixedly assembled on the outer walls of the five transmission connection cylinders III.

[0023] Preferably: A worm gear II is fixedly assembled on the outer wall at the bottom end of the transmission connection cylinder II, and a worm gear I is fixedly assembled on the outer wall at the bottom end of the transmission connection cylinder I;

[0024] The worm gear II is engaged with a worm I, and the worm gear I is engaged with a worm II;

[0025] The worm I and the worm II are integrally fixed with a driving rod. One end of the driving rod is hermetically and rotatably penetrated through the outside of the arc-shaped precipitation bottom tank and is connected with a servo motor I.

[0026] Preferably, the oil cleaning structure includes a transmission rod connected to the output shaft of the first servo motor, and a first helical gear is fixedly arranged at one end of the transmission rod away from the first servo motor, and the first helical gear meshes with a second helical gear;

[0027] A vertical shaft rod is fixedly arranged at the center of the second helical gear, and a worm body is fixedly installed on the outer wall of the vertical shaft rod.

[0028] Preferably, the worm body meshes with a worm gear body, a driving rod is fixedly arranged at the center of the worm gear body, and a transmission bearing is rotatably installed on the outside of the driving rod;

[0029] A driving disc is fixedly arranged on the outer wall of one end of the driving rod, and a round shaft rod is rotatably assembled on the inner wall of the driving disc.

[0030] Preferably, an angled rod is rotatably installed at one end of the round shaft rod away from the driving disc, a reset plate is rotatably installed at one end of the angled rod away from the round shaft rod, and a reset frame is arranged outside the reset plate;

[0031] The reset plate is movably located inside the reset frame;

[0032] A reset spring is assembled between the reset plate and the reset frame;

[0033] A dredging rod is assembled at one end of the reset plate away from the reset spring corresponding to the centrifugal filter hole.

[0034] The technical effects and advantages of the present invention:

[0035] In the present invention, through the coordinated operation of transmission components such as worm gears, worms, and straight-tooth rings, the synchronous rotation of the second transmission connection cylinder and the third transmission connection cylinder is achieved, and the inner spiral inside also rotates synchronously, which can automatically scrape off the impurities adhered to the inner sides of the second transmission connection cylinder and the third transmission connection cylinder, eliminating the need for manual disassembly and cleaning, saving labor costs, improving cleaning efficiency, and preventing the accumulation of impurities from affecting the normal operation of the equipment.

[0036] In the present invention, the second worm drives the first worm gear to rotate, causing the first transmission connection cylinder to rotate, and further enabling the first inner spiral to rotate on the inner wall of the first classification precipitation cylinder to clean impurities, which can effectively prevent impurities from adhering to the inner wall of the first classification precipitation cylinder, ensure the precipitation effect of the first classification precipitation cylinder, maintain the good working state of the equipment, ensure the normal operation of the equipment, and extend the service life of the equipment.

[0037] In the present invention, the arc-shaped precipitation bottom box is used to introduce the impurities after the precipitation of the heat treatment wastewater into multiple classification precipitation cylinders, which can isolate and precipitate the impurities with different properties and particle sizes in the wastewater, helping to improve the precipitation effect, preventing the mixing of impurities from affecting subsequent treatment, ensuring a more thorough precipitation process, and reducing the burden on subsequent treatment.

[0038] In the present invention, by means of the buoyancy of the float tube in the wastewater, the extraction inner tube can automatically adjust its height within the extraction outer tube, accurately extract the heat treatment wastewater at the top of the sedimentation tank, avoid extracting the wastewater with more impurities at the bottom, ensure the quality of the wastewater entering the subsequent treatment process, improve the treatment effect, and reduce the blockage and wear of the subsequent treatment equipment.

[0039] In the present invention, by starting the servo motor to drive the rotation of the centrifugal inner tank, based on the density difference of different components, under the action of centrifugal force, efficient separation of oil, water and solid impurities is achieved. The water and solid impurities with large density are thrown to the outer edge and discharged through the water liquid discharge pipe, and the oil with small density flows towards the center and flows out through the oil liquid discharge shaft pipe. This separation method can effectively recover the oil liquid resources, and at the same time make the treated water meet higher discharge standards, reducing environmental pollution. Brief Description of the Drawings

[0040] Figure 1 is a schematic structural diagram of an oil-water separator for a heat treatment production line provided by the present application;

[0041] Figure 2 is a schematic front structural diagram of an oil-water separator for a heat treatment production line provided by the present application;

[0042] Figure 3 is a schematic structural diagram of the sedimentation tank of an oil-water separator for a heat treatment production line provided by the present application;

[0043] Figure 4 is an oil-water separator for a heat treatment production line provided by the present application Figure 3 at the schematic structural diagram of part A;

[0044] Figure 5 is a schematic cross-sectional structural diagram of the centrifugal outer tank of an oil-water separator for a heat treatment production line provided by the present application;

[0045] Figure 6 is an oil-water separator for a heat treatment production line provided by the present application Figure 5 at the schematic structural diagram of part B;

[0046] Figure 7 is a schematic structural diagram of the centrifugal inner tank of an oil-water separator for a heat treatment production line provided by the present application;

[0047] Figure 8 is a schematic structural diagram of the dredging rod of an oil-water separator for a heat treatment production line provided by the present application;

[0048] Figure 9 is an oil-water separator for a heat treatment production line provided by the present application Figure 8 at the schematic structural diagram of part C.

[0049] In the figure:

[0050] 1. Separate the rack;

[0051] 2. Pretreatment structure; 201. Sedimentation box; 202. Arc-shaped sedimentation bottom box; 203. Heat treatment water inlet pipe; 204. Classification sedimentation cylinder 1; 205. Transmission connection cylinder 1; 206. Inner spur gear ring; 207. Outer spur gear ring; 208. Inner spiral 1; 209. Worm gear 1; 210. Classification sedimentation cylinder 2; 211. Transmission connection cylinder 2; 212. Inner spiral 2; 213. Worm gear 2; 214. Worm 1; 215. Active spur gear ring; 216. Classification sedimentation cylinder 3; 217. Transmission connection cylinder 3; 218. Driven spur gear ring; 219. Worm 2; 220. Active rod; 221. Servo motor 1; 222. Sludge bucket; 223. Sludge box; 224. Sewage pipe;

[0052] 3. Load-bearing vertical frame;

[0053] 4. Centrifugal separation structure; 401. Centrifugal outer box; 402. Centrifugal inner box; 403. Centrifugal filter hole; 404. Bevel cone groove; 405. Transmission hole rod; 406. Servo motor 2; 407. Supply pipe; 408. Extraction pump; 409. Extraction outer pipe; 410. Extraction inner pipe; 411. Float tube; 412. Oil discharge inner pipe; 413. Oil discharge shaft pipe; 414. Water discharge pipe;

[0054] 5. Support side frame; 6. Controller;

[0055] 7. Oil cleaning structure; 701. Transmission rod; 702. Bevel gear one; 703. Bevel gear two; 704. Vertical shaft; 705. Worm body; 706. Drive rod; 707. Worm wheel body; 708. Transmission bearing; 709. Drive plate; 710. Round shaft; 711. Bevel rod; 712. Reset plate; 713. Clearing rod; 714. Reset spring; 715. Reset frame. DETAILED DESCRIPTION

[0056] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The examples of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and design various embodiments with various modifications suitable for specific uses.

[0057] For example, see Figures 1 to 2, in this embodiment, an oil-water separator for a heat treatment production line is provided, including: a separation frame 1; a pretreatment structure 2 installed on the separation frame 1 for pre-filtering the oil-containing wastewater of the heat treatment production line;

[0058] The pretreatment structure 2 is used to precipitate and filter iron slag and impurities in the oil-containing wastewater of the heat treatment production line, reducing the occurrence of blockage during the oil-water separation of the oil-containing wastewater in the heat treatment production line. The pretreatment structure 2 is connected to a centrifugal separation structure 4 arranged on the separation frame 1, and the centrifugal separation structure 4 is used for centrifugal oil-water separation treatment of the precipitated heat treatment wastewater;

[0059] An oil liquid cleaning structure 7 is assembled between the centrifugal separation structure 4 and the pretreatment structure 2. The oil liquid cleaning structure 7 is used to cooperate with the pretreatment structure 2 to prevent blockage and dredge the blocked sundries and solidified oil liquid in the centrifugal separation structure 4 in the cleaning mode.

[0060] Example two, please refer to Figures 3 to 4 , in this embodiment, a pretreatment structure 2 in an oil-water separator for a heat treatment production line is provided;

[0061] The pretreatment structure 2 includes a precipitation tank 201, and an arc-shaped precipitation bottom tank 202 is integrally fixed at the bottom of the precipitation tank 201. The inner side of the arc-shaped precipitation bottom tank 202 is in a circular arc shape. The arc-shaped precipitation bottom tank 202 with a circular arc shape is conducive to the sliding precipitation of sludge, metal impurities and other solids in the heat treatment wastewater. A number of first classification precipitation cylinders 204 are fixedly arranged at equal intervals in a circular shape inside the arc-shaped precipitation bottom tank 202. A transmission connection cylinder 205 is rotatably assembled at the bottom end of the first classification precipitation cylinder 204. An inner spiral 208 closely attached to the inner side of the first classification precipitation cylinder 204 is fixedly installed on the inner wall of the transmission connection cylinder 205. When the inner spiral 208 rotates with the transmission connection cylinder 205, the impurities adhered to the inside of the first classification precipitation cylinder 204 can be scraped and cleaned;

[0062] An inner straight tooth ring 206 is integrally fixed on the outer wall of the transmission connection cylinder 205, and an outer straight tooth ring 207 rotatably arranged on the inner side wall of the arc-shaped precipitation bottom tank 202 is meshed with the outer side of the inner straight tooth ring 206. The inner straight tooth rings 206 of a number of the transmission connection cylinders 205 are all meshed with the outer straight tooth ring 207.

[0063] At the center position of the arc-shaped sedimentation bottom box 202, a second classification sedimentation cylinder 210 is fixedly assembled, and a second transmission connection cylinder 211 is rotatably installed at the bottom of the second classification sedimentation cylinder 210. An inner spiral 212 that closely adheres to the inner wall of the second classification sedimentation cylinder 210 is fixedly arranged inside the second transmission connection cylinder 211. When the inner spiral 212 rotates with the second transmission connection cylinder 211, it can scrape the impurities adhering to the inner wall of the second classification sedimentation cylinder 210. The number of the second classification sedimentation cylinders 210 is one, which is located at the center position of the arc-shaped sedimentation bottom box 202. An active straight gear ring 215 is fixedly assembled on the outer wall of the second transmission connection cylinder 211;

[0064] Five third classification sedimentation cylinders 216 are fixedly assembled at equal intervals in a circular shape along the outside of the second classification sedimentation cylinder 210 of the arc-shaped sedimentation bottom box 202. At the bottoms of the five third classification sedimentation cylinders 216, third transmission connection cylinders 217 are rotatably assembled. On the outer walls of the five third transmission connection cylinders 217, driven straight gear rings 218 that mesh with the active straight gear ring 215 are fixedly assembled. When the second transmission connection cylinder 211 rotates, it drives the driven straight gear rings 218 of the five third transmission connection cylinders 217 through the meshing of the active straight gear ring 215. Inside the five third transmission connection cylinders 217, inner spirals 219 that closely adhere to the inner walls of the third classification sedimentation cylinders 216 are fixedly arranged;

[0065] A second worm gear 213 is fixedly assembled on the outer wall at the bottom end of the second transmission connection cylinder 211, and a first worm gear 209 is fixedly assembled on the outer wall at the bottom end of the first transmission connection cylinder 205. The second worm gear 213 meshes with a first worm 214, and the first worm gear 209 meshes with a second worm 219;

[0066] The first worm 214 and the second worm 219 are integrally fixed with a driving rod 220. One end of the driving rod 220 rotatably penetrates through the outside of the arc-shaped sedimentation bottom box 202 in a sealed manner and is connected to a first servo motor 221. The first servo motor 221 is fixedly installed on the outer wall of the arc-shaped sedimentation bottom box 202 and is used to actively drive the rotation of the driving rod 220. A heat treatment water inlet pipe 203 is connected to the top end of the sedimentation box 201 in a penetrating manner. At the end of the heat treatment water inlet pipe 203 away from the sedimentation box 201, a flange part for sealing butt joint with an external pipe body is integrally fixed;

[0067] A sludge hopper 222 is fixedly sealed at the bottom end of the arc-shaped sedimentation bottom box 202. A sludge box 223 is connected to the bottom end of the sludge hopper 222 in a penetrating manner. A sewage discharge pipe 224 is connected to the side of the sludge box 223 in a penetrating manner. At the end of the sewage discharge pipe 224 away from the sludge box 223, a flange part for detachable installation with an external pipe body is assembled. A support side frame 5 is integrally fixed on the outer wall of the sedimentation box 201. The sedimentation box 201 is fixedly installed on the separation rack 1 through the support side frame 5. A controller 6 is installed on the outer wall of the support side frame 5.

[0068] Example 3. Please refer to Figures 5 to 7 , in this example, a centrifugal separation structure 4 in an oil-water separator for a heat treatment production line is provided;

[0069] The centrifugal separation structure 4 includes a centrifugal outer box 401, and a centrifugal inner box 402 is rotationally assembled inside the centrifugal outer box 401. A transmission hole rod 405 that is fixedly and rotationally arranged in the inner side of the centrifugal outer box 401 is integrally fixed in the middle of the centrifugal inner box 402. A plurality of tank bodies for discharging heat treatment liquid are formed in the part of the transmission hole rod 405 located in the centrifugal inner box 402;

[0070] A plurality of centrifugal filter holes 403 for centrifugally discharging water liquid are formed in the interior of the centrifugal inner box 402 along the outer side in a penetrating manner. An inclined angle cone groove 404 with an angle of 45° is formed along the centrifugal filter holes 403 on the outer edge of the centrifugal inner box 402. The inclined angle cone groove 404 faces the side of the centrifugal outer box 401, which is beneficial to guiding the centrifugally discharged water liquid to the bottom of the centrifugal outer box 401. The upper and lower ends of the centrifugal outer box 401 and the centrifugal inner box 402 are both in a conical arc shape, and the conical arc-shaped centrifugal outer box 401 and centrifugal inner box 402 are beneficial to the discharge of oil liquid and the outflow of water liquid;

[0071] The top end of the transmission hole rod 405 is located outside the centrifugal outer box 401 and is connected to a second servo motor 406. An oil liquid discharge inner pipe 412 for centrifugal filtration is integrally fixedly arranged at the bottom end position of the transmission hole rod 405 located in the centrifugal inner box 402. An oil liquid discharge shaft pipe 413 for centrifugal filtration and discharging oil liquid is rotationally assembled at the bottom end of the oil liquid discharge inner pipe 412 in a sealed manner. The oil liquid discharge shaft pipe 413 and the oil liquid discharge inner pipe 412 are rotationally assembled in a vertically penetrating and sealed manner through a sealed shaft body. The bottom end of the oil liquid discharge shaft pipe 413 is exposed outside the centrifugal outer box 401 and is integrally fixed with a flange part for sealing butt joint with an external pipe body.

[0072] A plurality of liquid inlet holes are formed in the inner wall of the top of the transmission hole rod 405 and penetrate outward. A supply pipe 407 is rotationally sleeved and assembled in a sealed manner outside the transmission hole rod 405 at the position of the liquid inlet holes. The supply pipe 407 is rotationally arranged in a sealed manner with the transmission hole rod 405, and the supply pipe 407 is fixedly arranged at an angle. When the transmission hole rod 405 rotates at a high speed, the angle of the supply pipe 407 will not change;

[0073] One end of the supply pipe 407 away from the transmission hole rod 405 is connected with a pumping pump 408, and the liquid pumping end of the pumping pump 408 is connected with an extraction outer pipe 409. An extraction inner pipe 410 is hermetically and slidably arranged inside the extraction outer pipe 409, and a floating ball pipe 411 is connected to the bottom end of the extraction inner pipe 410; a number of holes for extracting heat treatment liquid are formed at the bottom of the floating ball pipe 411, and the floating ball pipe 411 can float on the water surface under the buoyancy of the heat treatment liquid, and only the holes of the floating ball pipe 411 are located below the water surface of the heat treatment liquid.

[0074] The bottom end of the centrifugal outer box 401 is connected through a water and liquid discharge pipe 414. A flange member for hermetically assembling with an external pipe body is integrally fixed at the bottom end of the water and liquid discharge pipe 414. The water and liquid discharge pipe 414 is used for discharging the water and liquid filtered by centrifugation inside the centrifugal outer box 401; the outer wall of the centrifugal outer box 401 is integrally fixed with a load-bearing vertical frame 3, and the centrifugal outer box 401 is fixedly installed on the separation frame 1 through the load-bearing vertical frame 3.

[0075] Example Four, please refer to Figures 8 to 9 , in this example, an oil liquid cleaning structure 7 in an oil-water separator for a heat treatment production line is provided;

[0076] The oil liquid cleaning structure 7 includes a transmission rod 701 connected to the output shaft of the first servo motor 221. One end of the transmission rod 701 away from the first servo motor 221 is fixedly provided with a first helical gear 702, and the first helical gear 702 meshes with a second helical gear 703. The transmission rod 701 is driven to rotate by the first servo motor 221, and the second helical gear 703 rotates synchronously through the meshing transmission of the first helical gear 702;

[0077] A vertical shaft rod 704 is fixedly provided at the center of the second helical gear 703, and a worm body 705 is fixedly installed on the outer wall of the vertical shaft rod 704. A limiting shaft frame is arranged outside the worm body 705, and the limiting shaft frame fixedly assembles between the precipitation tank 201 and the centrifugal outer box 401.

[0078] The worm body 705 meshes with a worm wheel body 707. A driving rod 706 is fixedly provided at the center of the worm wheel body 707, and a transmission bearing 708 is rotatably installed outside the driving rod 706. The driving rod 706 is rotatably arranged inside the limiting shaft frame through the transmission bearing 708;

[0079] One end of the outer wall of the driving rod 706 is fixedly provided with a driving disc 709. A round shaft rod 710 is rotatably assembled on the inner wall of the driving disc 709. One end of the round shaft rod 710 away from the driving disc 709 is rotatably installed with an inclined rod 711. And one end of the inclined rod 711 away from the round shaft rod 710 is rotatably installed with a reset plate 712. And a reset frame 715 is arranged outside the reset plate 712. When the driving disc 709 rotates, the inclined rod 711 on the round shaft rod 710 can be reciprocally moved, and the reset plate 712 can be reciprocally moved. The reset plate 712 is movably located inside the reset frame 715;

[0080] A reset spring 714 is assembled between the reset plate 712 and the reset frame 715. The reset spring 714 is used for elastically resetting and restricting the reset plate 712. One end of the reset plate 712 away from the reset spring 714 is correspondingly assembled with a dredging rod 713 for the centrifugal filter hole 403. The dredging rod 713 is hermetically and movably located on the inner wall of the centrifugal outer box 401.

[0081] According to the above embodiments, the working principle of the present invention is as follows:

[0082] The wastewater after heat treatment is subjected to precipitation treatment through the pretreatment structure 2;

[0083] The wastewater after heat treatment is introduced into the inside of the precipitation tank 201 through the heat treatment inlet pipe 203. The impurities precipitated from the wastewater after heat treatment are introduced into the inside of the classification precipitation cylinder one 204, the classification precipitation cylinder two 210, and the classification precipitation cylinder three 216 through the arc-shaped precipitation bottom tank 202. The impurities in the wastewater after heat treatment are subjected to isolation precipitation treatment through the classification precipitation cylinder one 204, the classification precipitation cylinder two 210, and the classification precipitation cylinder three 216;

[0084] The precipitated wastewater after heat treatment passes through the starting extraction pump 408. The start of the extraction pump 408 extracts the wastewater after heat treatment precipitated on the inner top of the precipitation tank 201 through the floating ball pipe 411 connected to the extraction inner pipe 410 inside the extraction outer pipe 409. The wastewater after heat treatment is introduced into the inside of the transmission hole rod 405 through the supply pipe 407, and the wastewater after heat treatment is discharged into the centrifugal inner box 402;

[0085] When the floating ball pipe 411 extracts the wastewater after heat treatment, since the floating ball pipe 411 has a floating force on the wastewater after heat treatment, the automatic height adjustment can be carried out inside the extraction outer pipe 409 according to the buoyancy received by the extraction inner pipe 410 by the floating ball pipe 411, which is beneficial for the floating ball pipe 411 to extract the wastewater after heat treatment at the top of the precipitation tank 201;

[0086] When the centrifugal separation structure 4 separates and collects oil and water from the heat treatment wastewater, by starting the second servo motor 406, the start of the second servo motor 406 drives the transmission hole rod 405 and the fixed centrifugal inner box 402 to rotate. The rotation of the centrifugal inner box 402 causes the oil, water, and solid impurities in the heat treatment wastewater to be affected by centrifugal force. Components with a higher density (such as water and solid impurities) will be pushed towards the direction of centrifugal force, that is, away from the center of rotation, while the oil with a lower density will gather in the area of the centrifugal inner box 402 close to the center of rotation. In this way, different components in the oil of the heat treatment wastewater move along different paths in the centrifuge, thus achieving separation.

[0087] The heat treatment wastewater enters from the center of the centrifugal inner box 402 and flows in the rapidly rotating centrifugal inner box 402. The water and solid impurities with a higher density will be thrown to the centrifugal filtration holes 403 on the outer edge of the centrifugal inner box 402, and then discharged through the water discharge pipe 414 connected to the centrifugal outer box 401. The oil with a lower density will flow towards the center and flow out from the oil discharge shaft pipe 413 at the bottom of the inner oil discharge pipe 412, thus achieving the purpose of oil separation.

[0088] In the cleaning mode, by starting the first servo motor 221 and rotating the second servo motor 406 at a specific angle.

[0089] The started first servo motor 221 will drive the transmission rod 701 and the driving rod 220 to rotate simultaneously.

[0090] When the driving rod 220 rotates, the first worm 214 and the second worm 219 rotate synchronously, enabling the first worm 214 to drive the second worm gear 213 in meshing, and the second worm 219 to drive the first worm gear 209 in meshing.

[0091] The second transmission connection cylinder 211 rotates synchronously through the second worm gear 213, and the first transmission connection cylinder 205 rotates synchronously through the first worm gear 209. The rotating second transmission connection cylinder 211 drives the active straight tooth ring 215 on it to rotate, and the rotation of the active straight tooth ring 215 meshes with the rotation of several driven straight tooth rings 218. Then, through the driven straight tooth rings 218, the third transmission connection cylinder 217 is driven to rotate, enabling the inner helix two 212 and the inner helix three inside the third transmission connection cylinder 217 and the second transmission connection cylinder 211 to rotate synchronously, which is conducive to scraping the impurities adhered to the inside of the third transmission connection cylinder 217 and the second transmission connection cylinder 211, achieving the cleaning of the inside of the third transmission connection cylinder 217 and the second transmission connection cylinder 211.

[0092] The first worm gear 209 driven by the second worm 219 in meshing rotation will drive the first transmission connection cylinder 205 to rotate, enabling the first transmission connection cylinder 205 to drive the inner helix one 208 inside it to rotate on the inner wall of the first classification precipitation cylinder 204, thus cleaning the impurities adhered to the inner wall of the first classification precipitation cylinder 204.

[0093] The rotation of the transmission rod 701 drives the rotation of the first helical gear 702. The rotation of the first helical gear 702 meshes with the second helical gear 703 to rotate. The rotated second helical gear 703 drives the vertical shaft rod 704 to rotate, causing the worm body 705 to mesh with the worm gear body 707 to rotate. The worm gear body 707 drives the drive rod 706 to rotate, and the drive disk 709 rotates along with the drive rod 706. Through the rotation of the drive disk 709, the bevel rod 711 is restricted by the round shaft rod 710 to drive the reset plate 712 to reciprocate inside the reset frame 715. Moreover, the extended and moving reset plate 712 can move the dredging rod 713 into the centrifugal filtration holes 403 of the centrifugal inner box 402 to dredge and clean the solid oil stains and their impurities blocked in the centrifugal filtration holes 403. The cooperative rotation of the second servo motor 406 can sequentially dredge the centrifugal filtration holes 403.

[0094] Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art and related fields without creative efforts shall fall within the protection scope of the present invention. The structures, devices, and operation methods not specifically described and explained in the present invention, unless otherwise specified and limited, shall be implemented according to the conventional means in the art.

Claims

1. An oil-water separator for a heat treatment production line, characterized in that, Comprising: A separation frame (1); A pretreatment structure (2) installed on the separation frame (1), the pretreatment structure (2) includes a sedimentation tank (201) and an arc-shaped sedimentation bottom tank (202), the inner side of the arc-shaped sedimentation bottom tank (202) is in an arc shape and several first classification sedimentation cylinders (204) are fixedly arranged at equal distances inside in a circular shape, a transmission connection cylinder one (205) is rotatably assembled at the bottom of the first classification sedimentation cylinder (204), and an inner spiral one (208) tightly attached to the inner side of the first classification sedimentation cylinder (204) is fixedly installed on the inner wall of the transmission connection cylinder one (205); A second classification sedimentation cylinder (210) is fixedly arranged at the center position of the arc-shaped sedimentation bottom tank (202), a transmission connection cylinder two (211) is rotatably installed at its bottom, and an inner spiral two (212) is arranged inside the transmission connection cylinder two (211); Five third classification sedimentation cylinders (216) are fixedly arranged at equal distances along the outer side of the second classification sedimentation cylinder (210) of the arc-shaped sedimentation bottom tank (202), and transmission connection cylinders three (217) are rotatably assembled at their bottoms; The pretreatment structure (2) is connected to a centrifugal separation structure (4), including a centrifugal outer box (401) and a rotatably assembled centrifugal inner box (402), a transmission hole rod (405) is fixedly arranged in the middle of the centrifugal inner box (402), and a number of centrifugal filter holes (403) and 45° bevel cone grooves (404) are arranged along the outer edge of the centrifugal inner box (402); An oil liquid cleaning structure (7) is arranged between the centrifugal separation structure (4) and the pretreatment structure (2), including a transmission rod (701) connected to a first servo motor (221), the transmission rod (701) drives a worm body (705) on a vertical shaft rod (704) through a first bevel gear (702) and a second bevel gear (703), the worm body (705) meshes with a worm wheel body (707) to drive a driving disc (709), and the driving disc (709) drives a dredging rod (713) on a reset plate (712) to reciprocate through a round shaft rod (710) and an angled rod (711).

2. The oil-water separator for a heat treatment production line according to claim 1, characterized in that, A water liquid discharge pipe (414) is connected through the bottom end of the centrifugal outer box (401), the top end of the transmission hole rod (405) is connected to a second servo motor (406), and an oil liquid discharge inner pipe (412) and an oil liquid discharge shaft pipe (413) are arranged at the bottom end; The dredging rod (713) of the oil liquid cleaning structure (7) is arranged corresponding to the centrifugal filter holes (403), and a reset spring (714) is arranged between the reset plate (712) and a reset frame (715).

3. An oil-water separator for a heat treatment production line according to claim 2, characterized in that, A liquid inlet hole is opened on the inner wall of the top of the transmission hole rod (405), and a supply pipe (407) is rotatably sleeved outside in a sealed manner, the supply pipe (407) is connected to a pumping pump (408), and the pumping pump (408) is connected to a float pipe (411) through a pumping outer pipe (409) and a pumping inner pipe (410).

4. An oil-water separator for a heat treatment production line according to claim 1, characterized in that, The outer wall of the second drive connection cylinder (211) is fixed with a driving spur gear ring (215), the outer wall of the third drive connection cylinder (217) is fixed with a driven spur gear ring (218), the bottom end of the second drive connection cylinder (211) is provided with a second worm gear (213), the bottom end of the first drive connection cylinder (205) is provided with a first worm gear (209), and the first worm gear (209) and the second worm gear (213) are respectively engaged with a second worm (219) and a first worm (214).

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