Two-stage separation oil removal mechanism

Abstract

The application relates to a secondary separation type oil removal mechanism and belongs to the technical field of oil-water separation. The secondary separation type oil removal mechanism comprises a spraying tank and a separation tank. A water suction device and a conveying device are arranged in the spraying tank. A separation area is arranged in the separation tank. The separation tank is provided with a water inlet, an oil outlet and a sewage outlet. A floating ball assembly of the water suction device floats in the spraying tank and is communicated with the separation tank through a water inlet pipe. An adjusting assembly for adjusting the height is arranged on the floating ball assembly. The pneumatic diaphragm pump of the conveying device is communicated with the water inlet pipe. The separation area comprises a buffer area and a backwater area. The buffer area is communicated with the water inlet pipe and is internally provided with a guide plate group. The backwater area is provided with an overflow pipe and a backwater pipe. The overflow pipe is in the form of a sleeve pipe. The backwater pipe is communicated with the spraying tank. The application has the effects of effectively separating oil and water in the spraying tank liquid and reducing the disturbance of the tank liquid.

Description

Technical Field

[0001] This application relates to the technical field of oil-water separation, and in particular to a two-stage separation oil removal mechanism. Background Technology

[0002] In the machinery manufacturing industry, spraying is a crucial step in improving the appearance quality and protective performance of workpieces. With the development of industrial modernization, spraying production lines are increasingly widely used, greatly improving production efficiency and product quality. Pretreatment processes, as an important preceding step in the spraying production line, play a decisive role in the surface quality of workpieces. Among these, the oil-water separation technology in the degreasing process directly affects the recycling of the bath solution and the cleanliness of the workpieces, which is of great significance for reducing production costs, improving production efficiency, and reducing environmental pollution. Good oil-water separation ensures the purity of the bath solution, thereby guaranteeing the smooth progress of subsequent spraying processes and improving the overall quality and market competitiveness of the product.

[0003] In the past, various methods were conventionally used for oil-water separation in the degreasing process of the pretreatment stage of spray painting production lines. One common method utilizes gravity, allowing the oil-water mixture to stand for a period of time. Due to the difference in specific gravity between oil and water, the oil gradually rises to the surface, and then the upper layer of oil is drained through a simple oil discharge device, while the lower layer of solution flows back to the water tank for reuse. Some processes also utilize compressed air to drive a pneumatic diaphragm pump to transport the oil-water mixture to the separation equipment to accelerate the separation process. In addition, some processes incorporate simple filtration devices to pre-filter the solution, removing impurities and some grease, thereby improving the purity of the solution.

[0004] However, existing oil-water separation methods have significant drawbacks. Due to the lack of effective water flow buffering and level control measures, the water flow is significantly disturbed during separation, leading to unstable top levels and difficulty in effective oil accumulation, greatly affecting the separation effect. Furthermore, the inability to precisely control the suction port position easily results in the suction of clean liquid from the lower part of the tank for separation, increasing the workload and causing unnecessary disturbance to the tank, thus reducing separation efficiency. Utility Model Content

[0005] In order to effectively separate oil and water in the spraying tank and reduce tank disturbance, this application provides a two-stage separation oil removal mechanism.

[0006] The two-stage separation oil removal mechanism provided in this application adopts the following technical solution:

[0007] The two-stage separation degreasing mechanism includes a spray tank and also includes...

[0008] The separation box is horizontally fixed inside the spray tank, and the separation box is equipped with a water inlet, an oil outlet, and a sewage outlet.

[0009] Water suction device: The water suction device includes a float assembly, which floats in the spray tank and is connected to the separation box by a water inlet pipe. The float assembly is equipped with an adjustment component for adjusting its own height.

[0010] The conveying device includes a pneumatic diaphragm pump, which is fixedly connected to the inlet pipe.

[0011] Separation Zone: The separation device includes a buffer zone and a return water zone. The buffer zone is located inside the separation box and is connected to the inlet pipe. A baffle plate assembly is installed inside the buffer zone. An overflow pipe and a return water pipe are installed between the return water zone and the buffer zone. The top of the overflow pipe is installed at a height lower than the oil outlet height. The return water pipe is connected to the outside of the separation box.

[0012] By adopting the above technical solution, during the spraying production line operation, a float assembly floats within the spraying tank. The float height is adjusted using an adjusting assembly, ensuring the suction port is below the water surface. Only the oily portion of the tank liquid is drawn out for oil-water separation, minimizing disturbance to the tank liquid. A pneumatic diaphragm pump, powered by compressed air, is used to transport the oil-water mixture, ensuring safety and convenience. A buffer zone and guide plate assembly within the separation tank reduce water flow disturbance, preventing significant fluctuations in the top liquid level. Utilizing the fact that oil is less dense than water, the overflow pipe height is adjusted so that the overflow baffle at the oil outlet is higher than the water outlet. Oil accumulates at the outlet and is discharged, while water returns to the tank through the overflow and return pipes, achieving oil-water separation. This separation method requires no consumables and is simple to operate.

[0013] Optionally, the buffer zone includes a first isolation plate, which is fixed to the bottom of the separation tank. The water inlet pipe extends into the buffer space enclosed by the first isolation plate. The guide plate assembly includes multiple staggered arc-shaped baffles, which are fixedly connected to the first isolation plate.

[0014] By adopting the above technical solution, a buffer space surrounded by a first isolation plate and staggered arc-shaped baffles are set in the separation tank, which can effectively reduce water flow disturbance, make the top liquid level fluctuate without significant fluctuations, provide a stable environment for the oil to float and accumulate, and at the same time play a preliminary role in separating the oil-water mixture.

[0015] Optionally, the return water zone includes a second isolation plate, which is fixed to the side wall of the separation tank, and the bottom plate of the second isolation plate does not contact the bottom of the separation tank. The overflow pipe includes an inner pipe and an outer pipe, the inner pipe is fixedly connected to the second isolation plate, and the outer pipe slides relative to the inner pipe in a vertical direction. The second isolation plate is provided with a sliding component for driving the outer pipe to slide relative to the inner pipe.

[0016] By adopting the above technical solution, the height of the overflow pipe can be flexibly adjusted by the sliding component to adapt to different oil and water separation requirements, which enhances the adaptability of the device to different working conditions. In addition, the design of the second isolation plate not contacting the bottom of the separation tank ensures that water can smoothly enter the return water area, which is conducive to the return and recycling of water.

[0017] Optionally, an anti-vortex grid is fixed to the top of the overflow pipe, and a cover net is fixed to the bottom of the overflow pipe.

[0018] By adopting the above technical solutions, the grid can prevent eddy currents in the overflow pipe, and the cover can prevent bottom sediment from entering the overflow pipe, ensuring the purity of the liquid in the overflow pipe and improving the effect and stability of oil-water separation.

[0019] Optionally, a ball valve is fixed on the return water pipe.

[0020] By adopting the above technical solution, the flow of water in the return water pipe can be controlled by a ball valve, which facilitates flexible adjustment of the return water volume.

[0021] Optionally, an oil collection device is provided at the oil outlet. The oil collection device includes an oil collector, an oil scraper, and an oil drain pipe. A third partition plate is fixed on the side wall of the separator. The oil collector is conical and fixedly connected to the third partition plate. The oil scraper abuts against the inner wall of the oil collector and rotates relative to the oil collector. A rotating assembly for driving the oil scraper to rotate is provided inside the third partition plate. The oil drain pipe is fixed at the oil outlet of the separator.

[0022] By adopting the above technical solution, an oil collection device is set at the oil outlet, and the oil is collected by the oil collector. The oil scraper rotates relative to the oil collector to scrape the oil in the oil collector to the oil discharge pipe for discharge. This can collect and discharge the separated oil more efficiently and improve the oil removal efficiency.

[0023] Optionally, the rotating assembly includes a rotating rod, a driving gear, a driven gear, and a rotating motor. The rotating motor is fixedly connected to the third isolation plate, the rotating motor is fixed to the driving gear, the oil scraper is fixed to the driving gear, the driven gear is fixed to the rotating rod, and the driving gear meshes with the driven gear.

[0024] By adopting the above technical solution, the active gear is driven by a rotating motor, which in turn drives the driven gear and the rotating rod to rotate, thereby causing the oil scraper to rotate relative to the oil collector. This effectively scrapes the oil in the oil collector to the oil drain pipe for discharge, thus improving the oil discharge efficiency.

[0025] Optionally, the adjustment assembly includes a rack, a transmission gear set, and a throttle. The rack reciprocates in the vertical direction and is fixedly connected to the float assembly. The rack meshes with the transmission gear set, and the throttle is fixed to the transmission gear set.

[0026] By adopting the above technical solution, the height of the float assembly can be conveniently adjusted by rotating the throttle and utilizing the meshing transmission of the transmission gear set and rack. This allows for flexible control of the water suction position of the suction device, enabling better adaptation to different liquid level conditions and precise suction of the oily portion of the liquid at the top of the tank.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. The position of the suction port is controlled by the float assembly and the adjustment assembly, so that only the oily part of the liquid in the upper part of the tank is sucked out for separation, reducing the disturbance to the tank liquid;

[0029] 2. Oil-liquid separation is achieved by gravity separation using a separation tank, buffer zone, and return water zone. No consumables are required, and the operation is simple.

[0030] 3. Powered by a pneumatic diaphragm pump driven by compressed air, it makes the transportation and separation of oil-water mixtures safe and convenient. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0032] Figure 2 This is a schematic diagram of the internal separation box, water suction device and conveying device of the spray tank in this application;

[0033] Figure 3 This is a schematic diagram of the cross-sectional structure of the separation box in this application;

[0034] Figure 4 This is a top view of the separation box in this application.

[0035] In the diagram, 1. Separation box; 11. Inlet pipe; 12. Drain pipe; 2. Suction device; 21. Float assembly; 22. Adjustment assembly; 221. Rack; 222. Transmission gear set; 223. Throttle; 3. Conveying device; 31. Pneumatic diaphragm pump; 4. Separation zone; 41. Buffer zone; 411. First isolation plate; 412. Guide plate assembly; 42. Return water zone; 421. Second isolation plate; 42 2. Overflow pipe; 4221. Inner pipe; 4222. Outer pipe; 423. Anti-vortex grille; 424. Cover mesh; 425. Return water pipe; 5. Sliding assembly; 51. Screw; 52. Screw block; 53. Drive motor; 6. Oil collection device; 61. Oil collector; 62. Oil scraper; 63. Oil drain pipe; 7. Rotating assembly; 71. Rotating rod; 72. Driving gear; 73. Driven gear; 74. Rotating motor. Detailed Implementation

[0036] The following is in conjunction with the appendix Figures 1-4 This application will be described in further detail.

[0037] This application discloses a two-stage separation oil removal mechanism.

[0038] refer to Figure 1 and Figure 2 The two-stage separation oil removal mechanism includes a spray tank and a separation box 1. The separation box 1 is horizontally fixed in the spray tank. The spray tank is equipped with a water suction device 2 and a conveying device 3. The separation box 1 is equipped with a buffer zone 41 and a return water zone 42. The separation box 1 is provided with a water inlet, an oil outlet and a sewage outlet, and is equipped with a water inlet pipe 11, an oil outlet pipe 63 and a sewage outlet pipe 12 respectively.

[0039] refer to Figure 1 and Figure 2 The water absorption device 2 includes a float assembly 21, which includes three floats and a connecting plate. The connecting plate is arranged in an equilateral triangle, and the three floats are evenly distributed on the connecting plate and fixed by bolts. The floats are made of plastic or rubber material with a certain buoyancy.

[0040] The adjustment assembly 22 includes a rack 221, a transmission gear set 222, and a throttle 223. A bracket is vertically fixed inside the spray tank. The rack 221 is vertically set inside the bracket. The transmission gear set 222 includes a large gear and a small gear, which mesh with each other. The large gear meshes with the rack 221. The throttle 223 is fixed to the small gear. Both the large gear and the small gear rotate relative to the bracket. When the throttle 223 is rotated, the small gear drives the large gear to rotate, thereby driving the rack 221 to move up and down. This allows the float assembly 21 to be adjusted in vertical height, so that the water inlet is lower than the water surface. The transmission gear set 222 can play a role in deceleration and buffering.

[0041] refer to Figure 2 The conveying device 3 includes a pneumatic diaphragm pump 31, which is fixedly connected to the water inlet pipe 11. The pneumatic diaphragm pump 31 drives the internal diaphragm to move by compressed air, pumping the oil-water mixture into the separator 1, which can achieve the purpose of convenience and efficiency.

[0042] refer to Figure 2 and Figure 3 The buffer zone 41 of the separation zone 4 includes a first isolation plate 411, which is fixed to the bottom of the separation tank 1 to form a buffer space. The water inlet pipe 11 extends into the buffer space. The guide plate group 412 includes multiple staggered baffles. The baffles are corrugated and curved. The baffles are fixedly connected to the side wall of the first isolation plate 411. The curved baffles can be made of metal or plastic. Their shape design can effectively reduce water flow disturbance and make the top liquid level have no obvious fluctuations. The buffer zone 41 allows the oil-water mixture entering the separation tank 1 to be initially buffered in the buffer space, reducing the impact on the subsequent separation process.

[0043] refer to Figure 2 and Figure 3 The return water zone 42 includes a second isolation plate 421, which is fixed to the side wall of the separation box 1, and the bottom plate of the second isolation plate 421 does not contact the bottom of the separation box 1, forming a relatively independent area; the return water zone 42 is provided with an overflow pipe 422 and a return water pipe 425.

[0044] The overflow pipe 422 is in the form of a sleeve, including an inner pipe 4221 and an outer pipe 4222. The inner pipe 4221 is fixedly connected to the second isolation plate 421, and the outer pipe 4222 slides vertically relative to the inner pipe 4221. The inner pipe 4221 and the outer pipe 4222 can be made of corrosion-resistant materials. An anti-vortex grid 423 is fixed at the top of the overflow pipe 422 to prevent the water in the overflow pipe 422 from forming vortices. A cover net 424 is fixed at the bottom of the overflow pipe 422 to filter impurities and prevent blockage of the overflow pipe 422.

[0045] The second isolation plate 421 is equipped with a sliding component 5, which includes a screw 51, a screw block 52 and a drive motor 53. The drive motor 53 is fixed to the second isolation plate 421. The motor shaft of the drive motor 53 is fixed to the screw 51. The screw block 52 is fixed to the outer tube 4222 and threadedly connected to the screw 51. When the drive motor 53 is started, it drives the screw 51 to rotate. Because the screw block 52 moves threadedly with the screw 51 and is fixedly connected to the outer tube 4222, it can achieve reciprocating motion in the vertical direction. By adjusting the height of the outer tube 4222, the height of the top of the overflow pipe 422 can be controlled, thereby adjusting the water level at the outlet.

[0046] The return water pipe 425 is connected to the outside of the separation tank 1. Water enters the return water area 42 from the bottom through the overflow pipe 422, and then returns to the tank through the return water pipe 425. A ball valve is fixed inside the return water pipe 425. The ball valve can be made of metal and is used to control the opening and closing of the return water pipe 425 and the flow rate.

[0047] refer to Figure 2 and Figure 4 An oil collection device 6 is provided at the oil outlet. The oil collection device 6 includes an oil collector 61, an oil scraper 62, and a rotating assembly 7 for driving the oil scraper 62 to rotate. The oil collector 61 is conical and fixedly connected to the third isolation plate. This conical design is conducive to the oil gathering towards the center. There are three oil scrapers 62, all of which abut against the inner wall of the oil collector 61. The three oil scrapers 62 are arranged at equal intervals along the oil collector 61 and rotate relative to the oil collector 61.

[0048] The rotating assembly 7 includes a rotating rod 71, a driving gear 72, a driven gear 73, and a rotating motor 74. A support rod is horizontally fixed on the third isolation plate. The rotating motor 74 is fixedly connected to the support rod and fixed to the driving gear 72. The driven gear 73 is fixed to the rotating rod 71. The oil scraper 62 is fixed to the rotating rod 71. The driving gear 72 meshes with the driven gear 73. When the rotating motor 74 starts, it drives the driving gear 72 to rotate. Through the meshing of the driving gear 72 and the driven gear 73, the rotating rod 71 rotates, thereby causing the oil scraper 62 to rotate relative to the oil collector 61, scraping the oil collected in the oil collector 61 towards the oil drain pipe 63.

[0049] The implementation principle of the two-stage separation degreasing mechanism in this application embodiment is as follows: the float assembly 21 and the adjustment assembly 22 of the water suction device 2 are used to precisely control the water suction port to be lower than the water surface, so that only the oily part of the liquid in the upper part of the tank is sucked out, reducing the disturbance to the tank liquid; the oil-water mixture is pumped into the separation tank 1 by the pneumatic diaphragm pump 31, and the water flow disturbance is reduced by the buffer zone 41 in the separation tank 1, so that the top liquid level is stabilized; taking advantage of the fact that the specific gravity of oil is less than that of water, the oil is gathered and discharged to the oil outlet by adjusting the height of the overflow pipe 422, while the water is returned to the tank through the return water pipe 425; the whole process adopts the gravity separation method, which has no consumables, is simple to operate, and uses compressed air as a power source, which is safe and convenient, effectively solving the problem of oil-water separation in the circulating water before the spraying production line, improving the cleaning effect of the workpiece and the recycling rate of the tank liquid.

[0050] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A two-stage separation degreasing mechanism, including a spray tank, characterized in that: Also includes Separation box (1) is horizontally fixed in the spray tank. The separation box (1) is provided with a water inlet, an oil outlet and a sewage outlet. Water suction device (2): The water suction device (2) includes a float assembly (21), which floats in the spray tank and is connected to the separation box (1) by a water inlet pipe (11). The float assembly (21) is equipped with an adjustment component (22) for adjusting its own height. Conveying device (3); the conveying device (3) includes a pneumatic diaphragm pump (31), which is connected and fixed to the inlet pipe (11). Separation zone (4): The separation device includes a buffer zone (41) and a return water zone (42). The buffer zone (41) is located inside the separation box (1) and is connected to the inlet pipe (11). A guide plate group (412) is provided inside the buffer zone (41). An overflow pipe (422) and a return water pipe (425) are provided between the return water zone (42) and the buffer zone (41). The top of the overflow pipe (422) is set at a height lower than the height of the oil outlet. The return water pipe (425) is connected to the outside of the separation box (1).

2. The two-stage separation oil removal mechanism according to claim 1, characterized in that: The buffer zone (41) includes a first isolation plate (411), which is fixed to the bottom of the separation box (1). The water inlet pipe (11) extends into the buffer space enclosed by the first isolation plate (411). The guide plate group (412) includes multiple staggered arc-shaped baffles, which are fixedly connected to the first isolation plate (411).

3. The two-stage separation oil removal mechanism according to claim 2, characterized in that: The return water zone (42) includes a second isolation plate (421), which is fixed to the side wall of the separation box (1), and the bottom plate of the second isolation plate (421) does not contact the bottom of the separation box (1). The overflow pipe (422) includes an inner pipe (4221) and an outer pipe (4222). The inner pipe (4221) is fixedly connected to the second isolation plate (421), and the outer pipe (4222) slides vertically relative to the inner pipe (4221). A sliding component (5) is provided inside the second isolation plate (421) for driving the outer pipe (4222) to slide relative to the inner pipe (4221).

4. The two-stage separation oil removal mechanism according to claim 3, characterized in that: The top of the overflow pipe (422) is fixed with an anti-vortex grid (423), and the bottom of the overflow pipe (422) is fixed with a cover net (424).

5. The two-stage separation oil removal mechanism according to claim 1, characterized in that: A ball valve is fixed on the return water pipe (425).

6. The two-stage separation oil removal mechanism according to claim 1, characterized in that: An oil collection device (6) is provided at the oil outlet. The oil collection device (6) includes an oil collector (61), an oil scraper (62), and an oil drain pipe (63). A third isolation plate is fixed on the side wall of the separator (1). The oil collector (61) is conical and fixedly connected to the third isolation plate. The oil scraper (62) abuts against the inner wall of the oil collector (61) and rotates relative to the oil collector (61). A rotating assembly (7) for driving the oil scraper (62) to rotate is provided inside the third isolation plate. The oil drain pipe (63) is fixed at the oil outlet of the separator (1).

7. The two-stage separation oil removal mechanism according to claim 6, characterized in that: The rotating assembly (7) includes a rotating rod (71), a driving gear (72), a driven gear (73), and a rotating motor (74). The rotating motor (74) is fixedly connected to the third isolation plate. The rotating motor (74) is fixed to the driving gear (72). The oil scraper (62) is fixed to the driving gear (72). The driven gear (73) is fixed to the rotating rod (71). The driving gear (72) meshes with the driven gear (73).

8. The two-stage separation oil removal mechanism according to claim 1, characterized in that: The adjustment assembly (22) includes a rack (221), a transmission gear set (222), and a throttle (223). The rack (221) moves back and forth in the vertical direction and is fixedly connected to the float assembly (21). The rack (221) meshes with the transmission gear set (222), and the throttle (223) is fixed to the transmission gear set (222).

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