An oil-water separator

Abstract

The present invention relates to the technical field of filters, and specifically discloses an oil-water separator, which includes a sedimentation tank. The interior of the sedimentation tank is divided into two upper and lower chambers by a first partition, which are a separation total chamber and a water storage chamber respectively. The separation total chamber is divided into left and right chambers by a second partition; a sector-shaped filter cartridge, the filter cartridge is rotatably installed on the second partition around its axis direction, the upper end of the filter cartridge is open, and the bottom surface is a filter screen. The cleaning mechanism includes a flushing rod rotatably installed on the lower end surface of the filter cartridge and a baffle rotatably installed in the filter cartridge around the axis direction of the filter cartridge. The front side of the flushing rod extends beyond the front side of the baffle, and a plurality of upwardly facing water spray holes are arranged on the flushing rod, and the water spray holes are communicated with the water storage chamber; The beneficial effect of the present invention is that it can recover the oil in the impurities while cleaning the filter screen.

Description

Technical Field

[0001] The present invention relates to the technical field of filters, and particularly to an oil-water separator. Background Art

[0002] In the process of carbon black production, the pretreatment of raw oil is a key step. The main purpose is to remove impurities and harmful substances in the raw oil, and improve the quality and performance of carbon black. First, the raw oil is heated to an appropriate temperature, usually around 70 - 80 °C, to reduce its viscosity. Then, the heated raw oil passes through a filter to remove solid impurities such as sediment and rust. After that, the filtered raw oil is introduced into a sedimentation tank for static sedimentation. After the oil-water separation, the finally treated raw oil is used for carbon black production.

[0003] The Chinese patent document with the publication number CN117482579B discloses an oil-water separator for methanol production, which includes an oil storage tank. The interior of the oil storage tank is divided into two parts by a partition cylinder. Among them, the inside of the partition cylinder is a water storage chamber. An oil-water mixing tank is provided at the upper part of the oil storage tank. A floating oil layer collection component is provided in the oil-water mixing tank. An oil layer siphon is provided on the oil-water mixing tank. The floating oil layer collection component and the oil storage tank are connected together through the oil layer siphon. A compensation type water layer automatic separation component is provided on the inner bottom wall of the oil-water mixing tank. During operation, first, the raw oil is introduced into the oil-water mixing tank. After standing for a period of time until the oil-water separation, the upper light oil enters the oil storage tank through the oil layer siphon and passes through the floating oil layer collection component. When the light oil is discharged, the lower water enters the water storage chamber through the compensation type water layer automatic separation component.

[0004] In the above technology, when introducing the raw oil into the oil-water mixing tank, it is necessary to filter the raw oil first. However, the solid impurities after filtration contain some oil-water mixture. In the prior art, the impurities on the filter mesh are not easy to clean, and at the same time, the oil in the impurities is not easy to recover. Summary of the Invention

[0005] The present invention provides an oil-water separator, aiming to solve the technical problems that the impurities on the filter mesh in the related technology are not easy to clean, and at the same time, the oil in the impurities is not easy to recover.

[0006] An oil-water separator includes a sedimentation tank. The interior of the sedimentation tank is divided into two upper and lower chambers by a partition one, which are a separation total chamber and a water storage chamber respectively. The separation total chamber is divided into left and right chambers by a partition two;

[0007] A sector-shaped filter cartridge, which is rotatably installed on the partition two around its axis direction. The upper end of the filter cartridge is open, and the bottom surface is a filter mesh;

[0008] Cleaning mechanism, the cleaning mechanism includes a flushing rod rotatably installed on the lower end face of the filter cartridge and a baffle rotatably installed in the filter cartridge around the axis of the filter cartridge. The front side of the flushing rod extends beyond the front side of the baffle. A plurality of upwardly facing water spray holes are provided on the flushing rod, and the water spray holes communicate with the water storage cavity. In the initial state, when the filter screen rotates from the left chamber to the right chamber, the water spray holes flush water into the filter cartridge from the front side of the baffle. At the same time, the flushing rod and the baffle move from one end of the filter screen to the other end. At this time, a cavity with an upper opening is formed between the flushing rod, the baffle and the inner side wall of the filter cartridge. At the same time, the flushing rod and the baffle swing reciprocally to change the volume of the cavity. Finally, the flushing rod is completely separated from the front end plate of the filter cartridge, so that the liquid in the cavity is discharged.

[0009] The effect is that: by using the water separated from the raw material oil to wash the impurities and then statically separating the water that has washed the impurities again, the oil in the impurities can be recovered.

[0010] Preferably, a second motor is provided on the flushing rod. An arc-shaped track groove is opened on the second partition plate. The arc-shaped track groove is coaxial with the filter cartridge. An arc-shaped rack is provided in the track groove. The output end of the second motor is connected to a gear that meshes with the arc-shaped rack.

[0011] Preferably, a rotating shaft coaxial with the filter cartridge is rotatably installed on the second partition plate, and the filter cartridge is installed on the rotating shaft. An arc-shaped through hole that penetrates up and down and is coaxial with the rotating shaft is opened on the rotating shaft. A connecting rod is rotatably installed in the arc-shaped through hole around the axis of the through hole. The upper end of the connecting rod is connected to the baffle, and a clutch assembly is provided at the lower end of the connecting rod. When the filter screen rotates from the first separation chamber to the second separation chamber, the clutch assembly connects the flushing rod and the connecting rod. When the filter screen rotates from the second separation chamber to the first separation chamber, the clutch assembly connects the connecting rod and the filter cartridge.

[0012] Preferably, the clutch assembly includes an elastic telescopic block one provided at the portion of the connecting rod that abuts against the filter cartridge and an elastic telescopic block two provided at the portion of the connecting rod that abuts against the flushing rod. A groove one that cooperates with the elastic telescopic block one is opened on the filter cartridge. A groove two that cooperates with the elastic telescopic block two is opened on the flushing rod, and the telescopic resistance of the elastic telescopic block two is greater than the telescopic resistance of the elastic telescopic block one.

[0013] Preferably, a slag discharging mechanism is further provided in the filter cartridge. The slag discharging mechanism includes a slag discharging port opened at the rear side of the front end plate of the filter cartridge and a sealing component for sealing the slag discharging port. When the impurities are washed, the sealing component is opened, and the baffle pushes the impurities into the slag discharging port.

[0014] Preferably, the sealing component includes a sealing plate rotatably installed in the filter cartridge around the axis of the filter cartridge and a convex block provided in front of the baffle. An elastic member one for making the sealing plate located at the rear side of the slag discharging port is provided between the sealing plate and the front end plate of the filter cartridge.

[0015] Its effect is that by pushing the sealing plate with the baffle, the slag discharge port is opened.

[0016] Preferably, a blind hole with an opening facing forward is provided on the front side of the baffle. The convex block is slidably installed in the blind hole. An elastic member II for protruding the convex block from the front of the baffle is provided in the blind hole. A plurality of air outlet holes communicating with the blind hole are provided on one side of the convex block close to the sealing plate. An air inlet hole is provided on the baffle. A one-way valve I for allowing gas to enter the baffle is provided in the air inlet hole. A one-way valve II for discharging the gas in the blind hole is provided in the air outlet hole. When flushing the impurities, the convex block is reciprocally contracted and extended in the baffle under the extrusion of the sealing plate and the push of the elastic member II.

[0017] Its effect is that by the reciprocating expansion and contraction of the convex block in the baffle, the gas in the air cavity formed between the blind hole and the convex block is discharged into the impurities, thereby improving the flushing effect on the impurities.

[0018] Preferably, a slag discharge groove communicating with the outside of the sedimentation tank is provided on the partition II. When the filter screen rotates from the separation chamber I to the separation chamber II, the slag discharge port is located above the slag discharge groove.

[0019] Its effect is that it is convenient to discharge the impurities from the filter cylinder.

[0020] Preferably, two filter cylinders are provided, and the two filter cylinders are arranged in a circumferential array around the rotating shaft.

[0021] Its effect is that the use frequency of a single filter cylinder is reduced, and thus the time for replacing the filter cylinder is reduced.

[0022] Adopting the above technical solution, the beneficial effect of the present invention is:

[0023] By providing a filter cylinder, impurities in the raw material oil can be filtered out. By using the water separated from the raw material oil to flush the impurities, and by providing a right separation chamber to statically settle the water that has flushed the impurities, and by performing oil-water separation again through a post-treatment device, the raw material oil in the impurities can be recovered. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0025] Figure 2 It is a schematic diagram of the structure of the partition II of the present invention.

[0026] Figure 3 It is an exploded view of the parts of the pre-treatment device of the present invention.

[0027] Figure 4 It is a schematic diagram of the structure of the filter cylinder of the present invention.

[0028] Figure 5 It is a schematic diagram of the structure of the baffle and the flushing rod of the present invention.

[0029] Figure 6 This is the front view of the baffle of the present invention.

[0030] Figure 7 This is the cross-sectional view of the baffle of the present invention.

[0031] Figure 8 This is the schematic structural diagram of the flushing rod of the present invention.

[0032] Reference numerals:

[0033] 1. Settling tank; 11. Second partition plate; 12. Boss; 13. Track groove; 14. Arc-shaped rack; 15. Slag discharge groove; 2. Oil inlet pipe; 3. Pretreatment device; 31. Filter cartridge; 311. Front end plate; 312. Rear end plate; 313. Filter screen; 314. First groove; 32. Rotating shaft; 33. Cleaning mechanism; 331. Flushing rod; 3311. Water spraying groove; 3312. Pipe; 3313. Second groove; 332. Baffle; 3321. Protrusion; 3322. Second compression spring; 3323. Air outlet hole; 3324. Air inlet hole; 334. Gear; 335. Connecting rod; 3351. First elastic telescopic block; 3352. Second elastic telescopic block; 34. Slag discharge mechanism; 341. Discharge port; 342. Sealing plate; 343. First compression spring. Detailed Description of the Invention

[0034] The following details the embodiments of the present invention, and the examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0035] As Figure 1 and Figure 2 shown, an oil-water separator according to an embodiment of the present invention includes a settling tank 1, an oil inlet pipe 2, a pretreatment device 3, and two post-treatment devices (not shown in the figure). The interior of the settling tank 1 is divided into upper and lower chambers by a first partition plate, which are a separation total chamber and a water storage chamber respectively. The separation total chamber is divided into left and right chambers by a second partition plate 11. The two post-treatment devices are respectively installed in the left and right chambers and are used to introduce water into the water storage chamber after the raw oil has been statically settled, and discharge the oil out of the settling tank 1 for further processing. The pretreatment device 3 is arranged on the second partition plate 11 and is used to filter the raw oil discharged from the oil inlet pipe 2 into the settling tank 1.

[0036] As Figures 2 - 4As shown in the figure, the pretreatment device 3 includes two filter cartridges 31, a rotating shaft 32, a cleaning mechanism 33, and a slag discharging mechanism 34. The rotating shaft 32 is rotatably installed on the second partition plate 11. The two filter cartridges 31 are fixedly installed on the rotating shaft 32, and the two filter cartridges 31 are arranged in a circumferential array around the rotating shaft 32. The filter cartridge 31 is composed of a sector frame coaxial with the rotating shaft 32 and fixedly installed on the rotating shaft 32, and a sector filter screen 313 located on the lower end surface of the sector frame. The end plate at the front end of the sector frame is the front end plate 311, and the end plate at the rear end of the sector frame is the rear end plate 312. A first motor (not shown in the figure) is installed inside the second partition plate 11, and the output end of the first motor is connected to the rotating shaft 32. The cleaning mechanism 33 is used to clean the filter screen 313 to prevent the filter screen 313 from being blocked. The slag discharging mechanism 34 is used to discharge the impurities in the filter cartridge 31 outside the filter cartridge 31.

[0037] As Figures 2 - 5 shown in the figure, the cleaning mechanism 33 includes a flushing rod 331 rotatably installed on the lower end surface of the filter cartridge 31, and two baffles 332 rotatably installed in the two filter cartridges 31 respectively along the axial direction of the filter cartridge 31. A convex platform 12 extending to the right is installed on the right side surface of the second partition plate 11. An arc-shaped track groove 13 coaxial with the filter cartridge 31 is opened on the convex platform 12. The opening of the arc-shaped track groove 13 faces upward. An arc-shaped slider adapted to the track groove 13 is installed on the flushing rod 331. The arc-shaped slider is slidably installed in the track groove 13 along the axial direction of the track groove 13. A second driving source for driving the arc-shaped slider to move in the track groove 13 is provided on the arc-shaped slider. The front side surface of the flushing rod 331 extends beyond the front side surface of the baffle 332. A water spraying groove 3311 penetrating upward is opened on the upper end surface of the part of the flushing rod 331 that extends beyond the front side surface of the baffle 332. The upper end surface of the water spraying groove 3311 abuts against the filter screen 313. A plurality of upward water spraying holes are installed in the water spraying groove 3311. A pipeline 3312 connecting the water spraying holes to the water storage cavity is installed on the flushing rod 331. A water pump (not shown in the figure) for pumping water into the water spraying holes is provided in the water storage cavity. A third driving source for driving the baffle 332 to rotate in the corresponding filter cartridge 31 is provided on the rotating shaft 32.

[0038] In the initial state, the two filter cartridges 31 are respectively located above the left and right chambers. After the filter cartridge 31 above the left chamber has filtered the raw oil and becomes a dirty filter cartridge 31, the motor drives the rotating shaft 32 to rotate 180°, so that the dirty filter cartridge 31 rotates from the left chamber to the right chamber, and the water spray hole flushes water into the filter cartridge 31 from the front side of the baffle 332. At the same time, the flushing rod 331 and the baffle 332 move from the rear end of the filter screen 313 to the front end of the filter screen 313. At this time, an upper opening cavity is formed between the flushing rod 331, the baffle 332 and the inner side wall of the fan-shaped frame. At the same time, the flushing rod 331 and the baffle 332 swing back and forth to change the volume of the cavity. When the front side surface of the flushing rod 331 coincides with the front end surface of the fan-shaped frame, due to the flushing The front side of the washing rod 331 exceeds the front side of the baffle 332, so the washing rod 331 blocks the filter 313 at the lower end of the cavity. At this time, the water spray holes in the water spray trough 3311 spray water upward, and the water passes through the filter 313 into the cavity to wash the impurities. When the washing rod moves backward so that the front side of the washing rod 331 is offset from the front end face of the fan-shaped frame, the washing rod 331 no longer blocks the filter 313 at the lower end of the cavity. At this time, the liquid passes through the filter 313 and is discharged from the cavity, and then the above process is repeated many times, so that the raw oil adhered to the surface of the impurities is flushed into the right chamber by water, and finally the slag discharge mechanism 34 discharges the cleaned impurities from the filter barrel, and the washing rod 331 and the baffle 332 move in the opposite direction to reset.

[0039] like Figure 3 , Figure 5 and Figure 8 As shown, driving source 2 includes motor 2 (not shown in the figure) installed on the flushing rod 331, an arc-shaped rack 14 is installed in the track groove 13, and a gear 334 meshing with the arc-shaped rack 14 is installed at the output end of motor 2. When the dirty filter cartridge 31 rotates from the left chamber to the right chamber, motor 2 drives the gear 334 to move along the arc-shaped rack 14, so that the flushing rod 331 moves from the rear end of the filter screen 313 on the dirty filter cartridge 31 to the front end of the filter screen 313.

[0040] like Figures 3 - 8As shown in the figure, the drive source three includes two "C"-shaped connecting rods 335 and two sets of clutch components respectively arranged on the two connecting rods 335. Two arc-shaped through holes that penetrate up and down and are coaxial with the rotating shaft 32 are formed on the rotating shaft 32. The two arc-shaped through holes are arranged in a circumferential array around the rotating shaft 32. The two filter cartridges 31 are respectively located outside the two arc-shaped through holes. The vertical sections of the two connecting rods 335 are respectively inserted into the two arc-shaped through holes. The horizontal rods at the upper ends of the two connecting rods 335 are respectively fixedly connected to the two baffle plates 332. The clutch component includes an elastic telescopic block one 3351 installed on the upper horizontal rod of the connecting rod 335 and an elastic telescopic block two 3352 installed on the lower horizontal rod of the connecting rod 335. A groove one 314 that cooperates with the elastic telescopic block one 3351 is formed upward on the upper end surface of the sector frame. A groove two 3313 that cooperates with the elastic telescopic block two 3352 is formed on the flushing rod 331. And the telescopic resistance of the elastic telescopic block two 3352 is greater than that of the elastic telescopic block one 3351.

[0041] After the dirty filter cartridge 31 rotates from the left chamber to the right chamber, the elastic telescopic block two 3352 on the connecting rod 335 of the dirty filter cartridge 31 is inserted into the groove two 3313 on the flushing rod 331. When the second motor drives the flushing rod 331 to move forward, the flushing rod 331 drives the connecting rod 335 to move through the elastic telescopic block two 3352 inserted into the groove two 3313, and then drives the baffle plate 332 to move forward in the dirty filter cartridge 31. At this time, the elastic telescopic block one 3351 on the connecting rod 335 is squeezed by the upper end surface of the sector frame and contracts into the connecting rod 335. After the slag discharging mechanism 34 discharges the cleaned impurities from the filter cartridge 31, the second motor drives the flushing rod 331 to reset. When the elastic telescopic block one 3351 is gradually aligned with the groove one 314, the elastic telescopic block one 3351 gradually extends and gets stuck in the groove one 314. Then the first motor drives the rotating shaft 32 to rotate 180°. At this time, the rear end plate 312 of the sector frame pushes the baffle plate 332 to rotate forward, and the elastic telescopic block two 3352 is gradually squeezed by the flushing rod 331 and contracts into the connecting rod 335, thus disconnecting the connection between the connecting rod 335 and the flushing rod 331.

[0042] As Figure 3 and Figure 4 shown, the slag discharging mechanism 34 includes a slag discharging port 341 opened at the front end of the filter screen 313, a slag discharging groove 15 opened on the partition two 11 for communicating with the outside of the sedimentation tank 1, and a sealing component for sealing the slag discharging port 341. The slag discharging port 341 is located at the rear side of the front end surface of the sector frame. The sealing component is located at the rear side of the slag discharging port 341. After the impurities are flushed, the baffle plate 332 opens the sealing component and pushes the impurities into the slag discharging port 341.

[0043] As Figures 3 - 7As shown in the figure, the sealing assembly includes a sealing plate 342 rotatably installed in the filter cartridge 31 along the axis direction of the filter cartridge 31 and a bump 3321 installed in front of the baffle 332. An elastic member I, which is a compression spring I 343, is installed between the sealing plate 342 and the front end plate 311 of the fan-shaped frame to make the sealing plate 342 located at the rear side of the impurity discharge port 341. A blind hole with an opening facing forward is formed on the front side surface of the baffle 332, and the bump 3321 is slidably installed in the blind hole. An elastic member II, which is a compression spring II 3322, is arranged between the bump 3321 and the baffle 332 to make the bump 3321 protrude from the front of the baffle 332. After the bump 3321 protrudes from the front of the baffle 332, an air cavity is formed between the blind hole and the bump 3321. A plurality of air outlet holes 3323 communicating with the air cavity are formed on one side of the bump 3321 close to the sealing plate 342. An air inlet hole 3324 is formed on the baffle 332, and a check valve I for allowing gas to enter the air cavity is installed in the air inlet hole 3324. A check valve II for allowing gas to enter the cavity from the air cavity is installed in the air outlet hole 3323.

[0044] When flushing the impurities, during the process of the volume of the cavity becoming smaller, the bump 3321 is squeezed by the sealing plate 342 and thus contracts into the baffle 332, reducing the volume of the air cavity. At this time, the gas in the air cavity enters the cavity through the air outlet holes 3323, thereby impacting the impurities in the cavity, making the impurities flow rapidly in the water, and further separating the raw material oil on the impurities from the impurities. During the process of the volume of the cavity becoming larger, the bump 3321 is pushed by the elastic member II and thus protrudes from the baffle 332. At this time, the volume of the air cavity becomes larger, and the air outside the baffle 332 enters the air cavity through the check valve. After the flushing of the impurities is completed, the motor II drives the gear 334 to continue moving forward along the arc-shaped rack 14. The bump 3321 is first squeezed by the sealing plate 342 and thus contracts into the baffle 332. Until the bump 3321 abuts against the baffle 332, as the baffle 332 continues to move towards the sealing plate 342, the bump 3321 pushes the sealing plate 342 to contract the compression spring I 343, thereby communicating the cavity with the impurity discharge port 341. At this time, the water spraying groove 3311 on the flushing rod 331 extends beyond the front side of the filter screen 313, and the water spraying holes on the water spraying groove 3311 are located in the impurity discharge port 341. Then, the water spraying holes spray water towards the front side of the baffle 332, thereby flushing the impurities into the lower slag discharge tank 15. Finally, the motor II drives the gear 334 to rotate in the reverse direction for resetting.

[0045] The specific working principle of the present invention:

[0046] First, the raw oil is injected into the filter cartridge 31 located above the left chamber through the oil inlet pipe 2. After the raw oil is filtered, the motor 1 drives the rotating shaft 32 to rotate 180°. After the dirty filter cartridge 31 rotates from the left chamber to the right chamber, the elastic expansion block 2 3352 on the baffle 332 in the dirty filter cartridge 31 is stuck in the groove 2 3313, and the water spray hole flushes water into the filter cartridge 31 from the front side of the baffle 332. At the same time, the motor 2 drives the gear 334 to move forward along the arc rack 14, so that the flushing rod 331 and the baffle 332 are moved from the filter screen 313. The rear end moves to the front end of the filter screen 313. At this time, a cavity with an upper opening is formed between the flushing rod 331, the baffle 332, the sealing plate 342 and the inner wall of the fan-shaped frame. Then the flushing rod 331 sprays water into the cavity. At the same time, the motor 2 drives the gear 334 to move back and forth along the arc-shaped rack 14, so that the flushing rod 331 and the baffle 332 swing back and forth to change the volume of the cavity. When the front side of the flushing rod 331 coincides with the front end surface of the fan-shaped frame, since the front side of the flushing rod 331 exceeds the front side of the baffle 332, the flushing rod 33 1 The filter screen 313 at the lower end of the cavity is blocked. At this time, the water spray holes in the water spray tank 3311 spray water upward, and the water passes through the filter screen 313 into the cavity to wash the impurities. When the flushing rod moves backward so that the front side of the flushing rod 331 is offset from the front end of the fan-shaped frame, the flushing rod 331 no longer blocks the filter screen 313 at the lower end of the cavity. At this time, the liquid passes through the filter screen 313 and is discharged from the cavity. Then the above process is repeated many times, so that the raw material oil adhered to the surface of the impurities is washed into the right chamber by water, and then the motor second drives the gear 334 along The arc-shaped rack 14 continues to move forward, and the protrusion 3321 is first squeezed by the sealing plate 342 and thus shrinks into the baffle 332 until the protrusion 3321 abuts against the baffle 332. As the baffle 332 continues to move toward the sealing plate 342, the protrusion 3321 pushes the sealing plate 342 to shrink the compression spring 1 343, thereby connecting the cavity with the impurity discharge port 341, and then the water spray hole sprays water toward the front side of the baffle 332, thereby flushing the impurities into the slag discharge trough 15 below, and finally the motor 2 drives the gear 334 to rotate in the opposite direction for reset.

[0047] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. An oil-water separator, comprising a sedimentation tank and an inlet oil pipe. The interior of the sedimentation tank is divided into two upper and lower chambers by a first partition, namely a total separation chamber and a water storage chamber, and is characterized in that The separation chamber is divided into left and right chambers by a second partition. A pretreatment device is also provided in the separation chamber. The pretreatment device includes: a fan-shaped filter cartridge, which is rotatably installed on the second partition around its axis. The upper end of the filter cartridge is open, and the bottom surface is a filter screen; a cleaning mechanism, which includes a flushing rod rotatably installed on the lower end surface of the filter cartridge and a baffle rotatably installed in the filter cartridge around the axis of the filter cartridge. The front side of the flushing rod extends beyond the front side of the baffle. A plurality of upward-facing water spray holes are provided on the flushing rod, and the water spray holes are communicated with the water storage chamber. In the initial state, when the filter screen rotates from the left chamber to the right chamber, the water spray holes flush water into the filter cartridge from the front side of the baffle. At the same time, the flushing rod and the baffle move from one end of the filter screen to the other end. At this time, a cavity with an upper opening is formed between the flushing rod, the baffle and the inner side wall of the filter cartridge. At the same time, the flushing rod and the baffle swing reciprocally to change the volume of the cavity. Finally, the flushing rod is completely separated from the front end plate of the filter cartridge, so that the liquid in the cavity is discharged; a rotating shaft coaxial with the filter cartridge is rotatably installed on the second partition, and the filter cartridge is installed on the rotating shaft. An arc-shaped through hole penetrating up and down and coaxial with the rotating shaft is opened on the rotating shaft. A connecting rod is rotatably installed in the arc-shaped through hole around the axis of the through hole. The upper end of the connecting rod is connected to the baffle, and a clutch assembly is provided at the lower end of the connecting rod. When the filter screen rotates from the first separation chamber to the second separation chamber, the clutch assembly connects the flushing rod and the connecting rod. When the filter screen rotates from the second separation chamber to the first separation chamber, the clutch assembly connects the connecting rod and the filter cartridge; the clutch assembly includes an elastic telescopic block one provided at the portion of the connecting rod in contact with the filter cartridge and an elastic telescopic block two provided at the portion of the connecting rod in contact with the flushing rod. A groove one matching the elastic telescopic block one is opened on the filter cartridge, and a groove two matching the elastic telescopic block two is opened on the flushing rod. And the expansion and contraction resistance of the elastic telescopic block two is greater than that of the elastic telescopic block one.

2. The oil-water separator according to claim 1, characterized in that, A second motor is provided on the flushing rod. An arc-shaped track groove is opened on the second partition. The arc-shaped track groove is coaxial with the filter cartridge. An arc-shaped rack is provided in the track groove. The output end of the second motor is connected to a gear meshing with the arc-shaped rack.

3. The oil-water separator according to claim 1, wherein A slag discharging mechanism is also provided in the filter cartridge. The slag discharging mechanism includes a slag discharging port opened on the rear side of the front end plate of the filter cartridge and a sealing component for sealing the impurity discharging port. When the impurities are flushed, the sealing component is opened, and the baffle pushes the impurities into the slag discharging port.

4. An oil-water separator according to claim 3, characterized in that, The sealing component includes a sealing plate rotatably installed in the filter cartridge around the axis of the filter cartridge and a convex block provided on the front surface of the baffle. An elastic member one for making the sealing plate located at the rear side of the slag discharging port is provided between the sealing plate and the front end plate of the filter cartridge.

5. An oil-water separator according to claim 4, characterized in that, A blind hole with an opening facing forward is opened on the front surface of the baffle. The convex block is slidably installed in the blind hole. An elastic member two for making the convex block protrude from the front surface of the baffle is provided in the blind hole. A plurality of air outlet holes communicated with the blind hole are opened on the side of the convex block close to the sealing plate. An air inlet hole is opened on the baffle. A one-way valve one for making gas enter the baffle is provided in the air inlet hole. A one-way valve two for discharging the gas in the blind hole is provided in the air outlet hole. When flushing the impurities, the convex block is reciprocally contracted and extended in the baffle under the extrusion of the sealing plate and the push of the elastic member two.

6. The oil-water separator according to claim 5, characterized in that, A slag discharge groove communicating with the outside of the settling tank is formed in the second partition plate. When the filter screen rotates from the first separation chamber to the second separation chamber, the slag discharge port is located above the slag discharge groove.

7. An oil-water separator according to claim 1, characterized in that, There are two filter cartridges, and the two filter cartridges are arranged in a circumferential array around the rotating shaft.

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