An oil-water separation apparatus

Abstract

The application provides an oil-water separation device, belonging to the technical field of catering equipment, comprising a storage tank, a residue removal device, an oil discharge pipeline assembly, an air charging device and a water discharge pipeline assembly; the residue removal device is connected with a waste discharge end of a catering place and the storage tank respectively; the oil discharge pipeline assembly and the water discharge pipeline assembly are both communicated with the storage tank at one end and communicated with the outside of the oil-water separation device at the other end; the air charging device comprises an inflatable air bag, an air charging pipe and an air charging component; the air bag is in the storage tank and communicated with the air charging component through the air charging pipe; the air charging component is used for inflating the air bag to make it swell, so as to lift the liquid level in the storage tank and force the grease to be discharged through the oil discharge pipeline assembly. The oil-water separation device can discharge the residual grease in the interior.

Description

Technical Field

[0001] This invention belongs to the field of catering equipment technology, and specifically relates to an oil-water separation device. Background Technology

[0002] With the continuous expansion of large-scale centralized catering operation scenarios such as commercial complexes, government canteens, school canteens, hotels, and food courts, the burden of food waste and waste oil disposal is increasing year by year.

[0003] Existing conventional oil-water separation equipment relies on the characteristic that the density of oil is lower than that of water to achieve stratification, with oil floating on the surface of the wastewater; after the oil-water mixture has accumulated inside the equipment for a long time, the floating oil can only overflow from the oil outlet when the height of the floating oil exceeds the elevation of the oil outlet.

[0004] The overflow oil draining structure has inherent defects, and the floating oil inside the equipment cavity cannot be completely drained, resulting in a large amount of residual oil and making it difficult to achieve full recycling and disposal of waste oil. Summary of the Invention

[0005] This invention proposes an oil-water separation device that can lift the grease in the oil-water separator by inflating it with air, thereby discharging the residual grease from the oil-water separator.

[0006] To achieve the above objectives, the present invention proposes the following technical content:

[0007] An oil-water separation device includes a storage tank, a slag removal device, an oil discharge pipeline assembly, a drainage pipeline assembly, and an air supply device;

[0008] The slag removal device is connected to the swill discharge end of the catering establishment and the storage tank respectively, and is used to separate the solid and liquid of the incoming swill and discharge the oily wastewater into the storage tank;

[0009] Both the oil drain pipe assembly and the drain pipe assembly are connected to the storage tank at one end, and the other end is the drain outlet and the oil drain outlet, respectively;

[0010] The inflation device includes an inflatable airbag, an inflation tube, and an inflation component. The airbag is located in a storage tank and is connected to the inflation component through the inflation tube. The inflation component is used to inflate the airbag to raise the liquid level in the storage tank.

[0011] Furthermore, the slag removal device includes a slag removal box, at least one primary filtration and slag removal mechanism, a slag scraping mechanism of the same number as the filtration and slag removal mechanism and used in conjunction with it, and a swill inlet pipe;

[0012] The slag removal box is connected to the storage box; the swill inlet pipe is fixedly installed on the slag removal box and is used to guide the swill into the slag removal box. The swill is separated into solid and liquid by the filtration and slag removal mechanism. The solid residue remains on the filtration and slag removal mechanism, and the filtrate enters the storage box; the slag scraping mechanism is used to scrape the solid residue on the filtration and slag removal mechanism to the outside of the slag removal box.

[0013] Furthermore, each stage of the filtration and slag removal mechanism includes a concave-facing semi-circular filter grid plate, which is fixedly installed inside the slag removal box.

[0014] Each stage of the slag scraping mechanism includes a rotating shaft, a connecting structure, and a brush. One end of the connecting structure is fixed to the rotating shaft, and the brush is fixedly installed at the other end of the connecting structure. The rotating shaft is rotatably connected inside the slag removal box, and the brush of each stage of the slag scraping mechanism contacts the concave surface of the corresponding filter grid plate. A power component that drives the rotating shaft to rotate is provided outside the slag removal box.

[0015] When the filtration and slag removal mechanism has multiple stages, the solid slag on the previous stage of the filtration and slag removal mechanism can be scraped to the next stage of the filtration and slag removal mechanism by the scraping mechanism of that stage. The scraping mechanism at the last stage scrapes the solid slag on the last stage of the filtration and slag removal mechanism to the outside of the slag removal box. The rotating shafts of each stage of the scraping mechanism are equipped with transmission components, and all rotating shafts are driven to rotate in the same direction at the same time by the power components.

[0016] When the filtration and slag removal mechanism is only a single stage, the solid slag on the filtration and slag removal mechanism of that stage is directly scraped to the outside of the slag removal box by the slag scraping mechanism of that stage, and the power unit is directly connected to the rotating shaft of the slag scraping mechanism of that stage and drives it to rotate.

[0017] Furthermore, the transmission component is a chain-sprocket drive, a gear meshing drive, or a belt-pulley drive.

[0018] Furthermore, when the filtration and slag removal mechanism has multiple stages, the bristles of the brushes of adjacent two-stage slag scraping mechanisms can abut against each other during rotation.

[0019] Furthermore, the storage box includes a primary buffer compartment and a secondary separation compartment that are interconnected.

[0020] Furthermore, the oil drain pipeline assembly includes an oil drain channel, an oil outlet, and a valve;

[0021] The lower end of the oil drain channel is fixedly connected to the storage tank, and the oil drain channel is connected to the interior of the storage tank; the oil outlet is horizontally opened on the oil drain channel and is connected to the oil drain channel; the valve is fixedly installed on the oil drain channel and is used to open and close the oil outlet.

[0022] Furthermore, a sensor for detecting grease is installed in the oil discharge channel, and the sensor is located below the oil outlet; the sensor is connected to a control module; the valve is an electric valve, and the control module is electrically connected to the valve. When the sensor detects a grease signal, the sensor transmits the signal to the control module, and the control module opens the valve after receiving the signal to achieve automatic oil discharge; when the sensor does not detect a grease signal, the control module does not receive a signal from the sensor, and the valve remains closed.

[0023] Furthermore, the drainage pipeline assembly includes a drainage channel and a water outlet; the drainage channel is fixedly installed on the secondary separation chamber, with its bottom end connected to the secondary separation chamber and its top end connected to the water outlet, which is located on the storage tank.

[0024] Furthermore, the bottom of the water outlet is lower than the bottom of the oil outlet by (0, 15] cm.

[0025] Furthermore, it also includes a valve mechanism for controlling the opening and closing of the water outlet;

[0026] When the upper end of the drainage channel is the outlet, the valve mechanism is a solenoid valve or a manual valve. The valve mechanism is fixedly installed on the drainage channel and is used to directly open and close the outlet.

[0027] When the upper end of the drainage channel is indirectly connected to the outlet, a frame is fixedly installed at the upper end of the drainage channel. The frame is fitted and fixed to the drainage channel by the through hole at its bottom. The bottom plate of the frame is sealed to the drainage channel, and the outlet is opened on the side wall of the frame. The valve mechanism includes: a sealing fixed flange, a sealing gasket, at least one guide rod, a sealing movable flange, a linear drive component, a push-pull rod connecting plate, at least one elastic component, and a guide rod fixed flange.

[0028] The guide rod fixing flange is horizontally fixed to the inner side wall of the frame; the sealing fixing flange is welded and fixed to the top end face of the drainage channel, keeping it coaxial with the drainage channel; the upper end of the guide rod is fixedly connected to the guide rod fixing flange, and the lower end is fixedly connected to the sealing fixing flange.

[0029] Each guide rod has a stepped shaft section with a narrower diameter at its upper end. The push-pull rod connecting plate is horizontally sleeved on the stepped shaft section at the upper end of the guide rod and slides freely up and down along the axial direction of the guide rod. Multiple elastic components are sleeved on the outer side of the stepped shaft section of each guide rod and are in a pre-compressed state after assembly. The upper end of the elastic component abuts against the lower surface of the guide rod fixing flange, and the lower end abuts against the upper surface of the push-pull rod connecting plate.

[0030] Furthermore, the overall preload of the elastic component is less than the rated thrust of the linear drive component.

[0031] Furthermore, the top of the secondary separation chamber is configured as an inverted funnel shape.

[0032] The beneficial effects that can be achieved by adopting the above technologies are:

[0033] 1. This solution uses an air-filling device to increase the grease level, allowing residual grease in the oil-water separator to be discharged from the separator, resulting in a more thorough discharge.

[0034] 2. The slag removal device uses a multi-stage filter grid plate, which makes the solid-liquid separation more thorough; at the same time, the bristles of the adjacent two-stage slag scraping mechanism can touch each other during operation to achieve a self-cleaning function.

[0035] 3. By using a valve mechanism instead of a transmission-driven electric ball valve, maintenance costs can be reduced for non-high-requirement sealing conditions in this solution. At the same time, the overall preload of the elastic component is less than the rated thrust of the linear drive component, which can protect the linear drive component under imperfect process conditions. Attached Figure Description

[0036] Figure 1 This is one of the overall views of this equipment;

[0037] Figure 2 This is the second overall view of the equipment;

[0038] Figure 3 This is a schematic diagram of the slag removal device;

[0039] Figure 4 This is a schematic diagram of the oil drain line assembly;

[0040] Figure 5 This is a schematic diagram of the drainage pipe assembly.

[0041] 1. Storage tank; 11. Partition; 12. Primary buffer chamber; 13. Secondary separation chamber; 14. Connecting pipe; 2. Slag removal device; 21. Slag removal box; 22. Filter grid plate; 23. Swill inlet pipe; 24. Oily wastewater discharge pipe; 25. Slag collector; 26. Brush; 3. Aeration device; 31. Air pump; 32. Airbag; 33. Aeration pipe; 4. Oil drain pipeline assembly; 41. Oil drain channel; 42. Oil outlet; 43. Valve; 5. Drainage pipeline assembly; 51. Drainage channel; 52. Enclosure; 53. Water outlet; 54. Sealing flange; 55. Sealing gasket; 56. Guide rod; 57. Sealing movable flange; 58. Linear drive component; 59. Push-pull rod connecting plate; 510. Elastic component; 511. Guide rod fixing flange; 6. Observation window; 7. Heating rod. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] Example 1: As Figure 1 As shown, an oil-water separation device includes a storage tank 1, a slag removal device 2, an aeration device 3, an oil discharge pipeline assembly 4, and a drainage pipeline assembly 5; the various mechanisms work together to sequentially complete the solid-liquid separation of swill, oil-water stratification, timed oil discharge, and drainage operations.

[0044] like Figure 3 As shown, the slag removal device 2 includes a slag removal box 21, a filtration and slag removal mechanism of at least one stage, a slag scraping mechanism of the same number of stages as the filtration and slag removal mechanism, a swill inlet pipe 23, and a slag collector 25.

[0045] The slag removal box 2 is connected to the top plate of the storage box 1, and the connection method is either fixed connection or detachable connection; the swill inlet pipe 23 is fixedly installed on the side wall of the slag removal box 21, one end of which is connected to the swill discharge end of the catering establishment, and the other end is connected to the inside of the slag removal box 21, for conveying swill to the slag removal box 21.

[0046] In this embodiment, the filtration and slag removal mechanism is configured with at least two stages. Each stage of the filtration and slag removal mechanism includes a concave-facing semi-circular filter grid plate 22. All filter grid plates 22 are fixedly installed inside the slag removal box 21, arranged sequentially in the horizontal direction with their axes parallel to each other. When viewed from the axial projection along the filter grid plate 22, the ends of two adjacent filter grid plates 22 are connected. The outlet end of the swill inlet pipe 23 faces upwards towards the first-stage filter grid plate, and is used to guide the swill to the first-stage filter grid plate. The surface of each filter grid plate 22 is densely covered with filter holes to intercept solid residues in the swill.

[0047] like Figure 3 As shown, each stage of the slag scraping mechanism includes a rotating shaft, a connecting structure, and a brush 26. In this embodiment, since the slag scraping mechanism has multiple stages, there are multiple rotating shafts, referred to as one active rotating shaft and multiple driven rotating shafts.

[0048] The axes of the active rotating shaft and each driven rotating shaft are parallel to the axis of the filter grid plate 22, and are rotatably mounted on the slag removal box 21. When viewed along the axial direction of the active rotating shaft, the active rotating shaft and each driven rotating shaft are located at the center of the corresponding filter grid plate 22, ensuring that the brush 26 can stably and concentrically fit with the concave surface of the filter grid plate 22 when it rotates.

[0049] The connecting structures are fixedly installed on the side walls of the corresponding active rotating shaft and multiple driven rotating shafts. Brushes 26 are fixedly installed at the ends of the connecting structures away from the corresponding rotating shafts. Each brush 26 corresponds to one of the multiple filter grid plates 22. The bristles of the brush 26 extend along the axial direction of the filter grid plate 22. After installation, the bristles of the brush 26 completely cover the axial length of the filter grid plate 22 and contact the concave inner wall of the filter grid plate 22, ensuring that the brush 26 can scrape across the entire wall surface of the filter grid plate 22 as the active rotating shaft or each driven rotating shaft rotates. The top of the slag removal box 21 is an inspection port for installing and maintaining internal equipment. In this embodiment, the connecting structure is a connecting rod or a connecting plate.

[0050] It also includes a transmission component for driving the rotating shafts of all slag scraping mechanisms to rotate synchronously and in the same direction; in this embodiment, the transmission component is a chain-sprocket drive. In other embodiments, gear meshing transmission or belt-pulley transmission may also be used. The transmission component is driven by a slag removal motor fixedly installed outside the storage tank 1.

[0051] 1. When using chain-sprocket drive, sprockets are fixedly installed on the driving shaft and multiple driven shafts respectively. Simultaneously, a tensioning shaft is rotatably mounted on the slag removal housing 21, and sprockets are fixedly mounted on the tensioning shaft. Chains are simultaneously fitted onto and meshing with all sprockets. The shaft of the slag removal motor is coaxially connected to the driving shaft. Through this chain-sprocket drive structure, the slag removal motor simultaneously drives all shafts to rotate synchronously and in the same direction. Both the chain and sprockets can be located outside the slag removal housing 21, saving internal space.

[0052] 2. When using belt-pulley drive, pulleys are fixedly installed on the driving shaft and multiple driven shafts respectively. Simultaneously, a tensioning shaft is rotatably mounted on the slag removal box 21, and pulleys are fixedly mounted on the tensioning shaft. Belts are simultaneously fitted onto all pulleys, and all pulleys rotate in the same direction and synchronously through the friction of the belts. Both the belts and pulleys can be located outside the slag removal box 21, saving internal space.

[0053] 3. When using gear meshing transmission, gears are fixedly installed on the driving shaft and multiple driven shafts respectively. At the same time, multiple transmission shafts are rotatably assembled on the slag removal box 21, and gears are fixedly installed on each transmission shaft, so that the gears on the driving shaft and multiple driven shafts rely on the meshing of the gears on each transmission shaft for transmission. All gears can be set on the outside of the slag removal box 21, which can save internal space of the slag removal box 21.

[0054] The area of ​​the slag removal box 21 located below the filter grid plate 22 is connected to the storage tank 1. In this embodiment, an oily wastewater discharge pipe 24 is fixedly installed at the bottom of the slag removal box 21. The oily wastewater discharge pipe 24 is located below the filter grid plate 22 and can collect the oily wastewater that leaks through each filter grid plate 22. One end of the oily wastewater discharge pipe 24 is connected to the chamber of the slag removal box 21, and the other end is connected to the storage tank 1, for discharging the collected oily wastewater into the storage tank 1. In other embodiments, the area of ​​the slag removal box 21 located below the filter slag removal mechanism is set as a hollow structure, so that the wastewater discharged from the filter grid plate 22 of the filter slag removal mechanism can directly collect into the chamber of the slag removal box 21.

[0055] The specific slag scraping process is as follows: The slag removal motor is installed on the slag removal box 21. When the slag removal motor simultaneously drives all the active rotating shafts, multiple driven rotating shafts, and multiple brushes 26 to rotate through the transmission components, the bristles of each brush 26 can contact the surface of the corresponding filter grid plate 22, thereby scraping the solid slag on the surface of the previous filter grid plate 22 to the next filter grid plate 22. Finally, the final slag scraping mechanism scrapes the solid slag towards the slag collector 25 fixedly installed on the slag removal box 21. During the movement of the solid slag on the multi-stage filter grid plates 22, the oily wastewater on the surface can be filtered more comprehensively.

[0056] During the rotation of two adjacent brushes 26, their bristles can touch each other. Upon contact, solid debris trapped on the brushes 26 is brushed off, achieving self-cleaning of the brushes 26. In this embodiment, when viewed by projection along the axis of rotation, the distance between the active and driven shafts of two adjacent scraping mechanisms, or the distance between two driven shafts, is less than the sum of the lengths of the brushes and connecting structures on the two adjacent scraping mechanisms. Therefore, during the rotation of two adjacent brushes 26, their bristles can achieve the aforementioned mutual contact. The bristles of the brushes 26 are made of nylon or fine steel wire.

[0057] like Figure 1As shown, in this embodiment, the storage tank 1 is internally divided into a primary buffer chamber 12 and a secondary separation chamber 13 that are interconnected. The internal cavity of the storage tank 1 is first divided into the primary buffer chamber 12 and the secondary separation chamber 13 by a partition, and then a connecting pipe 14 is fixedly installed on the storage tank 1. Both ends of the connecting pipe 14 are connected to the primary buffer chamber 12 and the secondary separation chamber 13 respectively, thus achieving interconnection between the primary buffer chamber 12 and the secondary separation chamber 13. The oily wastewater entering the storage tank 1 first enters the primary buffer chamber 12, and then overflows through the connecting pipe 14 into the secondary separation chamber 13. When the primary buffer chamber 12 receives the oily wastewater discharged from the oily wastewater discharge pipe 24, the original oily wastewater in the primary buffer chamber 12 remains agitated under the impact of the newly entering oily wastewater. The agitated oily wastewater overflows through the connecting pipe 14 and enters the secondary separation chamber 13. In other embodiments, the storage tank 1 may not be divided into two compartments, and the oily wastewater after slag removal treatment may directly enter the storage tank 1. Subsequently, the oil drain assembly 4 and the drainage assembly 5 will be directly connected to the interior of the storage tank 1.

[0058] like Figure 2 and Figure 5 As shown, it also includes an oil drain pipeline assembly 4, comprising an oil drain channel 41, a heating rod 7, an oil outlet 42, and a valve 43; as Figure 4 As shown, in this embodiment, the oil drain channel 41 is located at the top of the secondary separation chamber 13, and its lower end is connected to the secondary separation chamber 13. The top of the secondary separation chamber 13 has an inverted funnel-shaped structure, which facilitates the flow of grease into the oil drain channel. The heating rod 7 is installed on the secondary separation chamber 13 and extends into the oil drain channel 41 to heat the grease in the oil drain channel 41, enabling it to flow. The oil outlet 42 is horizontally opened on the oil drain channel 41, with one end connected to the oil drain channel 41 and the other end connected to the outside. In other embodiments where the two chambers are not separated, the lower end of the oil drain channel 41 is directly located in and connected to the storage tank 1 cavity.

[0059] Valve 43 is fixedly installed on the oil drain channel 41 and is used to control the opening and closing of the oil outlet 42. In this embodiment, valve 43 is a manual valve; in other embodiments, it may be an electric valve.

[0060] In this embodiment, an observation window 6 is provided on the side of the secondary separation chamber 13, which can be used to observe the degree of grease accumulation in the secondary separation chamber 13, and the operator can start the oil drainage operation in time.

[0061] like Figure 1 and Figure 5As shown, the drainage pipe assembly 5 includes a drainage channel 51 and a water outlet 53. In this embodiment, the drainage channel 51 is a straight pipe structure, vertically inserted into and fixedly connected to the secondary separation chamber 13. The upper half of the drainage channel 51 is outside the secondary separation chamber 13, and the lower half is inside. The bottom inlet of the drainage channel 51 is close to the bottom surface of the secondary separation chamber 13. This design ensures that the drainage channel 51 is positioned well within the stratified water surface, rather than within the grease layer. The water outlet 53 is used to guide water away from the device. In other embodiments where the system is not divided into two chambers, the lower end of the drainage channel 51 is directly inside and connected to the storage tank 1 cavity.

[0062] In this embodiment, the upper end of the drainage channel 51 is indirectly connected to the outlet 53. A frame 52, which is a barrel-shaped structure with only a bottom surface, is fixedly installed on the upper end of the drainage channel 51. A through hole is opened on the bottom surface of the frame 52, which is fitted onto the drainage channel 51 through the through hole. The through hole of the frame 52 is welded to the outer wall of the drainage channel 51. After welding, the bottom plate of the frame 52 and the drainage channel 51 remain sealed. The top end of the drainage channel 51 is connected to the cavity of the frame 52. The aforementioned outlet 53 is opened on the side wall of the frame, and the cavity of the frame 52 is connected to the outlet 53.

[0063] A valve mechanism is installed in the cavity of the enclosure 52 to control the opening and closing of the top of the drainage channel 51, thereby controlling the opening and closing of the outlet 53. When the top opening of the drainage channel 51 is closed, the outlet 53 cannot drain water; when the top opening of the drainage channel 51 is open, wastewater can enter the cavity of the enclosure 52 through the drainage channel 51, and then be discharged from the enclosure of the enclosure 52 through the outlet 53 away from this separation equipment.

[0064] In this embodiment, the bottom of the water outlet 53 is lower than the bottom of the oil outlet 42 by (0, 15] cm, preferably 0.5 cm. Based on the principle of communicating vessels, when both the water outlet 53 and the oil outlet 42 are open, the water levels in the drainage channel 51 and the oil discharge channel 41 are at the same height. However, since the grease floats on the water surface, the aforementioned height value of (0, 15] cm is designed to ensure that the grease is smoothly discharged from the oil outlet 42.

[0065] like Figure 5 As shown, the valve mechanism includes: a sealing fixed flange 54, a silicone sealing gasket 55, at least one guide rod 56, a sealing movable flange 57, a linear drive component 58, a push-pull rod connecting plate 59, at least one elastic component 510, and a guide rod fixed flange 511.

[0066] The guide rod fixing flange 511 is horizontally fixed to the inner wall of the frame 52, serving as the upper fixing reference for the overall guide structure; the sealing fixing flange 54 is welded and fixed to the top end face of the drainage channel 51, maintaining coaxiality with the drainage channel 51. In this embodiment, four guide rods 56 are arranged vertically and parallelly. The upper end of each guide rod 56 is fixed to the guide rod fixing flange 511 with M6*20 hexagon socket head cap screws, and the lower end is fixed to the sealing fixing flange 54 with screws of the same specification. Each guide rod 56 has a stepped shaft section with a narrower diameter at the upper end, so that the guide rod 56 as a whole forms a stepped structure with a small-diameter guide section at the top and a large-diameter support section at the bottom.

[0067] The push-pull rod connecting plate 59 is horizontally sleeved on the upper stepped shaft section of the four guide rods 56, and is fitted with the stepped shaft section with a sliding clearance of 1-2mm, allowing it to slide freely up and down along the axial direction of the guide rods 56. Four elastic components 510 are correspondingly sleeved on the outer side of the stepped shaft section of each guide rod 56, and are in a pre-compressed state after assembly. The upper end of the elastic component 510 abuts against the lower surface of the guide rod fixing flange 511, and the lower end abuts against the upper surface of the push-pull rod connecting plate 59. This device uses parameter matching settings to ensure that the overall preload of the elastic component 510 is less than the rated thrust of the linear drive component 58. For example, the overall preload of the elastic component 510 is set to 700N (if there are four elastic components 510, the preload of a single set of elastic components 510 is 700 / 4=175N), and the rated thrust of the linear drive component 58 is set to 750N. In this embodiment, the elastic component 510 is a spring, a sheet, or rubber, preferably a spring.

[0068] Under normal no-load conditions, the push-pull rod connecting plate 59 is stably fitted and limited at the bottom end of the stepped shaft of the guide rod 56 by the preload force of the elastic component 510. The fixed end of the linear drive component 58 is fixed to the lower surface of the push-pull rod connecting plate 59 and is vertically arranged. The downward telescopic end of the linear drive component 58 is fixedly connected to the sealing movable flange 57 by screws. The sealing movable flange 57 is simultaneously slidably sleeved on the lower large-diameter area of ​​the four guide rods 56, forming a clearance sliding fit with the guide rods 56. It can smoothly rise and fall vertically along the guide rods 56 under the drive of the linear drive component 58 to ensure sealing alignment accuracy. The sealing gasket 55 is fixedly embedded in the upper end face of the sealing fixed flange 54 and simultaneously sleeved on the outside of the four guide rods 56 to achieve end face sealing of the drainage channel 51 port. In this embodiment, the linear drive component 58 is an electric push rod or a hydraulic push rod.

[0069] The valve mechanism works as follows: When the linear drive 58 extends outward, it pushes the sealing flange 57 downward along the guide rod 56, gradually compressing the sealing gasket 55, causing the sealing gasket 55 to undergo elastic deformation, filling the gap at the top end face of the drainage channel 51, and closing the drainage channel 51; when the linear drive 58 retracts and resets, it drives the sealing flange 57 upward along the guide rod 56, releasing the compression and locking of the sealing gasket 55, forming a flow gap on the sealing surface, opening the drainage channel 51, and allowing wastewater in the secondary separation chamber 13 to reach the cavity of the enclosure 52 through the drainage channel 51, and then be discharged from the equipment through the outlet 53 from the cavity of the enclosure 52. A drain outlet is provided at the bottom of the secondary separation chamber 13.

[0070] To address stroke interference issues caused by assembly errors, welding deformation, and thickness deviations of the sealing gasket 55, this valve mechanism incorporates a dedicated overload protection mechanism. Due to variations in on-site welding processes, cumulative assembly errors, and differences in the deformation of the sealing gasket 55, the linear drive 58 may experience a stall condition during sealing and clamping operations, where the sealing flange 57 has already pressed against the sealing gasket 55 before reaching the preset extension / retraction stroke, resulting in stroke obstruction. In this situation, the linear drive 58 continuously outputs its rated thrust. Since the rated thrust of the linear drive 58 exceeds the preload of the elastic component 510, the excess thrust overcomes the preload of the elastic component 510, pushing the push-pull rod connecting plate 59 upward along the guide rod 56, further compressing the elastic component 510. This secondary compression of the elastic component 510 absorbs the overload thrust and compensates for stroke errors. This elastic component 510 structure effectively releases the stall pressure of the linear drive 58, preventing it from burning out due to jamming overload and sudden current surges, significantly improving the operational stability and service life of the device.

[0071] If this device relies on natural water intake for oil drainage, grease will always remain in the secondary separation chamber 13, resulting in incomplete oil drainage. Therefore, this device is equipped with an air-filling device 3 to solve the above problem. The air-filling device 3 passively raises the grease level in the oil drainage channel 41, allowing the residual grease to be passively discharged from the equipment.

[0072] like Figure 2 As shown, the inflation device 3 includes an inflation component 31, an inflation pipe 33, and an airbag 32. In this embodiment, the airbag 32 is located in the secondary separation chamber 13 and is fixedly connected to and communicates with the inflation component 31 via the inflation pipe 33. Both the inflation pipe 33 and the inflation component 31 are located outside the secondary separation chamber 13. One end of the inflation pipe 33 is connected to and communicates with the airbag 32 via a sealing joint, and the other end is connected to and communicates with the air pump outlet via another sealing joint. The inflation component 31 is an air pump with a capacity of 15L / min or 30L / min, which can be selected according to the space dimensions of the secondary separation chamber 13. In other embodiments where the chamber is not divided into two chambers, the airbag 32 is located in the storage tank 1.

[0073] The drainage process of this device is as follows: the drainage channel 51 is opened while the oil outlet 42 is closed. As the swill from the catering establishments continues to enter this device, the wastewater in the secondary separation chamber 13 increases. When the water level is higher than the lower end of the outlet 53, the excess wastewater will be discharged from the device through the outlet 53.

[0074] The oil discharge process of this device is as follows: the drainage channel 51 is opened, and the oil outlet 42 is opened simultaneously. As the device continuously receives swill from catering establishments, the amount of grease in the secondary separation chamber 13 increases, and the stratified grease accumulates on the water surface. The upper layer of grease is guided by the inverted funnel-shaped structure to converge into the oil discharge pipe. In this embodiment, the operator periodically opens the valve 43 to open the oil outlet 42; simultaneously, the inflation component 31 is opened, and the inflation of the air bladder 32 further raises the height of the grease, forcing the bottom of the grease layer to be higher than the bottom of the oil outlet 42, thus completely discharging the grease from the device. During the oil discharge process, since the drainage channel 51 is not closed, the water outlet 53 can complete the drainage operation normally. When wastewater is observed being discharged from the oil outlet 42, the inflation component 31 can be stopped, and under the pressure of the wastewater in the secondary separation chamber 13, the air bladder deflates again.

[0075] The slag removal process of this device is as follows: the drainage channel 51 is closed, and the oil outlet 42 is opened simultaneously. After the device has been running for a period of time, a small amount of slag will remain suspended in the water in the secondary separation chamber 13. At this time, as the air bladder 32 is inflated, the slag suspended at a certain position (about 1-2 cm) below the water surface is lifted, and finally the slag is discharged from the device through the oil outlet.

[0076] Example 2: An oil-water separation device, differing from Example 1 in that: in this example, the filtration and slag removal mechanism is only single-stage, and the matching number of slag scraping mechanisms is also single-stage, and only has an active rotating shaft; a motor installed outside the storage tank 1 drives the active rotating shaft to rotate, thereby realizing the slag scraping operation. The brush in this example does not have a self-cleaning function.

[0077] Example 3: An oil-water separation device, differing from Example 1 in that: in this example, the lower end of the drainage channel extends into the secondary separation chamber 13, and the other end is the outlet. A valve mechanism is fixedly installed on the drainage channel; the valve mechanism is a solenoid valve or a manual valve, used to directly open and close the outlet.

[0078] Example 4: An oil-water separation device, differing from Example 1 in that: in this example, a sensor, such as an oil level sensor, is installed in the oil discharge channel 41, and used in conjunction with an electric valve and a control module, with the three electrically connected; when the sensor detects grease and triggers a signal, the controller transmits the signal to the control module, which then controls the valve 43 to open, automatically initiating the oil discharge operation. When the sensor does not detect a grease signal, the valve 43 remains closed.

[0079] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An oil-water separation device, characterized in that, It includes a storage tank (1), a slag removal device (2), an oil drain pipeline assembly (4), a drainage pipeline assembly (5), and an air filling device (3). The slag removal device (2) is connected to the swill discharge end of the catering establishment and the storage tank (1) respectively, and is used to separate the solid and liquid of the incoming swill and discharge the oily wastewater into the storage tank (1); The oil drain pipe assembly (4) and the drain pipe assembly (5) are connected at one end to the storage tank (1), and at the other end to the drain outlet and the oil drain outlet, respectively. The inflation device (3) includes an inflatable airbag (32), an inflation tube (33), and an inflation component (31). The airbag (32) is located in the storage tank (1) and is connected to the inflation component (31) through the inflation tube (33). The inflation component (31) is used to inflate the airbag (32) to raise the liquid level in the storage tank (1).

2. The oil-water separation device according to claim 1, characterized in that, The slag removal device (2) includes a slag removal box (21), at least one-stage filtration and slag removal mechanism, a slag scraping mechanism of the same number as the filtration and slag removal mechanism and used in conjunction with it, and a swill inlet pipe (23). The slag removal box (21) is connected to the storage box (1); the swill inlet pipe (23) is fixedly installed on the slag removal box (21) to guide the swill into the slag removal box (21). The swill is separated into solid and liquid by the filtration and slag removal mechanism. The solid residue remains on the filtration and slag removal mechanism, and the filtrate enters the storage box (1); the slag scraping mechanism is used to scrape the solid residue on the filtration and slag removal mechanism to the outside of the slag removal box (21).

3. The oil-water separation device according to claim 2, characterized in that, Each stage of the filtration and slag removal mechanism includes a concave-facing semi-circular filter grid plate (22), which is fixedly installed inside the slag removal box (21); Each scraping mechanism includes a rotating shaft, a connecting structure, and a brush (26). One end of the connecting structure is fixed to the rotating shaft, and the brush (26) is fixedly installed at the other end of the connecting structure. The rotating shaft is rotatably connected inside the slag removal box (21), and the brush of each scraping mechanism contacts the concave surface of the corresponding filter grid plate (22). The slag removal box (21) is provided with a power component that drives the rotating shaft to rotate. When the filtration and slag removal mechanism has multiple stages, the solid slag on the previous stage filtration and slag removal mechanism can be scraped to the next stage filtration and slag removal mechanism by the scraping mechanism of that stage. The scraping mechanism at the last stage scrapes the solid slag on the last stage filtration and slag removal mechanism to the outside of the slag removal box (21). The rotating shafts of each stage scraping mechanism are equipped with transmission components, and all rotating shafts are driven to rotate in the same direction simultaneously by the power components. When the filtration and slag removal mechanism is only a single stage, the solid slag on the filtration and slag removal mechanism of that stage is directly scraped to the outside of the slag removal box (21) by the slag scraping mechanism of that stage, and the power component is directly connected to the rotating shaft of the slag scraping mechanism of that stage and drives it to rotate.

4. The oil-water separation device according to claim 3, characterized in that, The transmission component is a chain-sprocket drive, a gear meshing drive, or a belt-pulley drive.

5. The oil-water separation device according to claim 3, characterized in that, When the filtration and slag removal mechanism has multiple stages, the bristles of the brushes of the adjacent two stages of the slag scraping mechanism can abut against each other during rotation.

6. The oil-water separation device according to claim 3, characterized in that, The storage box (1) includes a primary buffer compartment (12) and a secondary separation compartment (13) that are interconnected.

7. The oil-water separation device according to claim 6, characterized in that, The oil drain pipeline assembly (4) includes an oil drain channel (41), an oil outlet (42), and a valve (43). The lower end of the oil drain channel (41) is fixedly connected to the storage tank (1), and the oil drain channel (41) is connected to the interior of the storage tank (1); The oil outlet (42) is horizontally located above the oil drain channel (41); the valve (43) is fixedly installed at the oil outlet (42) to open and close the oil outlet (42).

8. The oil-water separation device according to claim 7, characterized in that, The oil drain channel (41) is equipped with a sensor for detecting grease. The sensor is located below the oil outlet (42). The sensor is connected to a control module. The valve (43) is an electric valve. The control module is electrically connected to the valve (43). When the sensor detects a grease signal, the sensor transmits the signal to the control module. After receiving the signal, the control module opens the valve (43) to achieve automatic oil drain. When the sensor does not detect a grease signal, the control module does not receive a signal from the sensor, and the valve (43) remains closed.

9. An oil-water separation device according to claim 7, characterized in that, The drainage pipeline assembly (5) includes a drainage channel (51) and a water outlet (53). The drainage channel (51) is fixedly installed on the storage tank (1), with its lower end extending into the storage tank (1) and communicating with it; the wastewater in the storage tank (1) can be discharged from the separation device through the drainage channel (51) and the outlet (53).

10. An oil-water separation device according to claim 9, characterized in that, The bottom of the water outlet (53) is lower than the bottom of the oil outlet (42) by 0, 15 cm.

11. An oil-water separation device according to claim 9, characterized in that, It also includes a valve mechanism for controlling the opening and closing of the outlet (53); 1) When the upper end of the drainage channel (51) is the outlet (53), the valve mechanism is a solenoid valve or a manual valve. The valve mechanism is fixedly installed on the drainage channel (51) and is used to directly open and close the outlet. 2) When the upper end of the drainage channel (51) is indirectly connected to the outlet (53), the upper end of the drainage channel (51) is fixedly installed with a frame (52). The frame (52) is fitted and fixed on the drainage channel (51) by the through hole on its bottom surface. The bottom plate of the frame (52) is sealed with the drainage channel (51). The outlet (53) is opened on the side wall of the frame (52). The valve mechanism includes: a sealing fixed flange (54), a sealing gasket (55), at least one guide rod (56), a sealing movable flange (57), a linear drive (58), a push-pull rod connecting plate (59), at least one elastic component (510), and a guide rod fixing flange (511). The guide rod fixing flange (511) is horizontally fixed on the inner side wall of the frame (52); the sealing fixing flange (54) is welded and fixed to the top end face of the drainage channel (51), and is coaxial with the drainage channel (51); the upper end of the guide rod (56) is fixedly connected to the guide rod fixing flange (511), and the lower end is fixedly connected to the sealing fixing flange (54). Each guide rod (56) has a stepped shaft section with a narrower diameter at its upper end. The push-pull rod connecting plate (59) is horizontally sleeved on the stepped shaft section at the upper end of the guide rod (56) and slides freely up and down along the axial direction of the guide rod (56). Multiple elastic components (510) are sleeved on the outer side of the stepped shaft section of each guide rod (56) and are in a pre-compressed state after assembly. The upper end of the elastic component (510) abuts against the lower surface of the guide rod fixing flange (511) and the lower end abuts against the upper surface of the push-pull rod connecting plate (59).

12. An oil-water separation device according to claim 11, characterized in that, The overall preload of the elastic component (510) is less than the rated thrust of the linear drive component (58).

13. An oil-water separation device according to claim 6, characterized in that, The top of the secondary separation chamber (13) is configured as an inverted funnel shape.

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