A centrifugal filtration device for edible oil

Abstract

This invention discloses an edible oil centrifugal filtration device, including a machine body structure and a control console for adjusting the rotation speed. A hopper cover is installed at the upper end of the machine body structure, and the control console is integrated into the hopper cover. The device also includes an oil inlet device, an oil pump, a centrifugal assembly, an extrusion assembly, a storage tank, a first drive device, a second drive device, and an oil outlet device. The extrusion assembly is coaxially mounted with the centrifugal assembly, and both the centrifugal assembly and the extrusion assembly are rotatably mounted to the machine body structure. The first drive device drives the centrifugal assembly to rotate at high speed, and the second drive device drives the extrusion assembly to rotate at slow speed. Waste residue generated during oil filtration is carried out from the centrifugal assembly through the extrusion assembly. This device uses centrifugation to separate solid particles in crude oil and can push out the separated solid particles, resulting in high separation efficiency and easier maintenance.

Description

Technical Field

[0001] This invention relates to a centrifugal filtration device for edible oil. Background Technology

[0002] Edible oils often contain solid impurities (such as oil cake, fiber, and gum), moisture, and other suspended solids during production and processing. These impurities affect the oil's transparency, flavor, storage stability, and food safety. Therefore, the filtration process in edible oil refining is crucial. Traditional filtration technologies mainly include gravity sedimentation, plate and frame filtration, bag filtration, and membrane filtration, but these methods generally suffer from low efficiency, high energy consumption, frequent filter media replacement, or unsatisfactory separation results.

[0003] Limitations of traditional filtration technology

[0004] Gravity sedimentation method: relies on the natural sedimentation of impurities, which takes a long time and is difficult to separate micron-sized particles, and cannot meet the needs of continuous industrial production.

[0005] Plate and frame filters: Although they can effectively trap solid impurities, the filter cloth is prone to clogging, requiring frequent shutdowns for cleaning, resulting in low production efficiency. Furthermore, the waste residue contains a high oil content (approximately 15%-20%), leading to oil waste.

[0006] Membrane filtration: Although it has high precision, the equipment is expensive and is prone to membrane fouling due to high oil viscosity, resulting in high maintenance costs.

[0007] Based on the above problems, we designed an edible oil centrifugal filtration device that uses centrifugation to separate solid particles from crude oil, and can push out the separated solid particles, resulting in high separation efficiency and easier maintenance. Summary of the Invention

[0008] The technical problem to be solved by the present invention is to provide an edible oil centrifugal filtration device that uses centrifugation to separate solid particles in crude oil, and can push out the separated solid particles, with high separation efficiency and more convenient maintenance.

[0009] To solve the above problems, the present invention adopts the following technical solution:

[0010] A centrifugal filtration device for edible oil includes a machine body structure and a control console for adjusting the rotation speed. A hopper cover is installed at the upper end of the machine body structure, and the control console is integrated into the hopper cover. The device also includes an oil inlet device, an oil pump, a centrifugal assembly, an extrusion assembly, a storage tank, a first drive device, a second drive device, and an oil outlet device. The extrusion assembly is coaxially mounted with the centrifugal assembly, and both the centrifugal assembly and the extrusion assembly are rotatably mounted to the machine body structure. The first drive device drives the centrifugal assembly to rotate at high speed, and the second drive device drives the extrusion assembly to rotate at a slow speed. Waste residue generated during oil filtration is carried out from the centrifugal assembly through the extrusion assembly, and the filtered edible oil is drawn into the storage tank through the oil outlet device. The oil pump is connected to an oil suction pipe and an oil delivery pipe. The oil suction pipe is connected to the oil inlet device, and the oil delivery pipe cooperates with the extrusion assembly. The control console connects and controls the oil pump, the first drive device, the second drive device, and the oil outlet device.

[0011] Preferably, the oil inlet device includes an oil inlet tank, an inner tube, a diverter hood, and an electric heater. The bottom of the oil inlet tank is machined into a conical gathering part, and a connecting pipe is welded to the bottom axis of the gathering part. The inner tube is threaded to the axis of the gathering part. A groove is machined on the outer wall of the inner tube, and a filter screen is welded in the groove. The diverter hood is frustum-shaped, with its diameter gradually decreasing upwards. A connecting part is installed at the bottom axis of the diverter hood, and the connecting part is inserted into and fixed to the upper end of the inner tube. The electric heater is connected to an electric heating tube. The edible oil diverted by the diverter hood falls and contacts the electric heating tube. The oil extraction pipe is connected to the connecting pipe. Multiple overflow holes are provided on the outer wall of the connecting part, and the overflow holes are exposed above the inner tube.

[0012] Preferably, an oil inlet pipe is installed at the axis of the oil inlet tank, a bracket is fixed between the oil inlet pipe and the oil inlet tank, the oil inlet pipe is coaxial with the flow divider, a concave hole is machined on the top of the flow divider, a filter cylinder is fixed in the concave hole, and the oil inlet pipe delivers oil into the filter cylinder.

[0013] Preferably, the centrifugal assembly includes a centrifugal cylinder and a slag discharge box. A hollow shaft is provided at one end of the centrifugal cylinder, and a conical barrel is fixedly installed at the end of the centrifugal cylinder away from the hollow shaft. The diameter of the conical barrel gradually decreases in the direction away from the centrifugal cylinder. The end of the conical barrel is inserted into the slag discharge box. The extrusion assembly passes through the slag discharge box and is then inserted into the centrifugal cylinder. The slag discharge box is fixed to the machine body structure, and there is a rotatable fit between the slag discharge box and the conical barrel. The hollow shaft is rotatably fitted to the machine body structure. The oil discharge device is installed via the hollow shaft, and the first driving device is connected to drive the hollow shaft. A slag discharge channel is welded downwards at an angle to the outside of the slag discharge box, and the slag discharge channel extends to the outside of the machine body structure.

[0014] Preferably, an annular recess is machined on the outer wall of the centrifuge cylinder at a position away from the conical barrel. Edible oil separated under the centrifugal force of the centrifuge cylinder collects in the annular recess, and the oil outlet device is used in conjunction with the annular recess.

[0015] Preferably, the oil outlet device includes an oil outlet pipe, a push rod, and a three-axis cylinder. The oil outlet pipe is coaxially inserted into the hollow shaft, and the oil outlet pipe and the hollow shaft are rotatably coupled. A bracket is fixedly installed between the oil outlet pipe and the machine body structure. A first connecting pipe is provided on the side of the oil outlet pipe, and a first oil pump is connected through the first connecting pipe. The first oil pump is connected to a three-way valve, and the first oil outlet pipe and the return oil pipe are connected through the three-way valve. A control valve is installed on the three-way valve, one of which corresponds to the first oil outlet pipe, and the other... The control valve corresponds to the return oil pipe, the end of which is inserted into the oil inlet device; the first oil outlet pipe corresponds to the storage tank; the three-axis cylinder is fixedly installed via the bracket body; a connecting plate is fixed to the outside of the push rod, the connecting plate is fixed to the movable end of the three-axis cylinder; the push rod is coaxial with the oil outlet pipe, the push rod is inserted into the oil outlet pipe, the push rod and the oil outlet pipe are clearance-fitted, edible oil passes through the clearance; a pipe cap is threaded to the end of the oil outlet pipe, and a sealing ring is sandwiched between the pipe cap and the oil outlet pipe. The push rod passes through the sealing ring and forms a seal with it; the oil outlet pipe is inserted into the centrifuge cylinder via a hollow shaft, and a housing is provided at the end of the oil outlet pipe that inserts into the centrifuge cylinder. A cap is detachably installed at the end of the housing. Two or more sleeves are arranged in a ring around the outer wall of the housing. A movable tube is slidably installed inside the sleeve. Both ends of the movable tube are spherically transitioned, and through holes are provided on the spherical surfaces at both ends of the movable tube. A limit cap is installed at the opening of the sleeve. A fixed position is provided at the position of the movable tube inside the sleeve. A limiting ring is provided, and a first sealing ring is fitted on the outer wall of the limiting ring. The first sealing ring forms a seal with the inner wall of the sleeve. A spring is fitted on the movable tube, and the spring acts between the limiting cap and the limiting ring. Under the action of the spring, the movable tube slides towards the inside of the sleeve. The push rod is inserted into the housing, and a push block is fixed at the end of the push rod that is inserted into the housing. The push block has an outer conical surface, which acts on the spherical surface of the movable tube. The outer end of the movable tube is located in the annular recess.

[0016] Preferably, a bristle holder is fixedly installed on the outer wall of the movable tube, and bristles are distributed in a ring on the outer end face of the bristle holder. The spherical end of the movable tube is located at the center of the multiple bundles of bristles. After the movable tube extends outward, the bristles act on the inner wall of the annular recess.

[0017] Preferably, the extrusion assembly includes an extrusion roller, one end of which passes through the slag discharge box and extends into the centrifuge cylinder, and this end is closed. The other end of the extrusion roller is fixed with a first hollow shaft. A second driving device is connected to drive the first hollow shaft. The first hollow shaft is rotatably engaged with the machine body structure. The extrusion roller is also rotatably engaged with the slag discharge box. A straight tube is inserted into the first hollow shaft. The straight tube is rotatably engaged with the first hollow shaft. A first support body is fixed between the straight tube and the machine body structure. One end of the straight tube is inserted to the middle position of the extrusion roller. The other end of the straight tube is connected to the oil delivery pipe. A spiral blade is fixed on the outer wall of the extrusion roller. The spiral blade is attached to the inner wall of the centrifuge cylinder and the conical barrel. Multiple conical oil nozzles are distributed in a ring on the outer wall of the extrusion roller.

[0018] Preferably, the extrusion roller is provided with a plurality of dispersing plates in a ring at the position corresponding to the slag discharge box.

[0019] The beneficial effects of this invention are:

[0020] Firstly, this device separates solid particles from crude oil using centrifugal force. The particles adhering to the inner wall of the centrifuge tube are pushed out by a spiral, achieving automatic slag discharge. The separated edible oil accumulates on the left side of the centrifuge tube under gravity and is extracted by pumping through an oil discharge device.

[0021] Secondly, the extraction diameter of the oil extraction device can be extended or retracted, which can reduce the residue of edible oil.

[0022] Thirdly, this device achieves preliminary filtration of crude oil through the oil inlet device, reducing the chance of blockage in the internal pipelines of the equipment.

[0023] Fourthly, this equipment has a high separation efficiency, strong self-cleaning ability, and is more convenient to maintain, making it suitable for widespread use. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of the present invention;

[0026] Figure 2 This is a schematic diagram showing the assembly of the centrifugal assembly and the extrusion assembly;

[0027] Figure 3This is a cross-sectional view of the oil inlet equipment;

[0028] Figure 4 This is a partial schematic diagram of the present invention;

[0029] Figure 5 for Figure 2 In a partial schematic diagram;

[0030] Figure 6 This is a half-sectional view of the oil outlet device;

[0031] Figure 7 This is a magnified view of point B;

[0032] Figure 8 This is a magnified view of point C;

[0033] Figure 9 This is a magnified view of point D;

[0034] Figure 10 This is a magnified view of point E;

[0035] Figure 11 This is a bottom view of the brush holder;

[0036] Figure 12 This is a magnified view of point A. Detailed Implementation

[0037] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0038] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0039] In the description of this invention, it should be understood that the terms "one end", "the other end", "outer side", "upper", "inner side", "horizontal", "coaxial", "center", "end", "length", "outer end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0040] Furthermore, in the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0041] In this invention, unless otherwise explicitly specified and limited, the terms "set," "socket," "connect," "through," and "plug-in" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0042] See Figure 1 and Figure 2 The illustrated edible oil centrifugal filtration device includes a body structure 1 and a control console 2 for adjusting the rotation speed. A chamber cover 3 is installed on the upper end of the body structure 1, and the control console 2 is integrated into the chamber cover 3. It also includes an oil inlet device 4, an oil pump, a centrifugal assembly 6, an extrusion assembly 7, a storage tank 8, a first drive device 9, a second drive device 10, and an oil outlet device 11. The extrusion assembly 7 is coaxially mounted with the centrifugal assembly 6, and both the centrifugal assembly 6 and the extrusion assembly 7 are rotatably mounted to the body structure 1. The first drive device 9 drives the... The centrifugal assembly 6 rotates at high speed, while the second drive device 10 drives the extrusion assembly 7 to rotate at a slow speed. The waste residue produced by oil filtration is carried out from the centrifugal assembly 6 through the extrusion assembly 7. The filtered edible oil is drawn into the storage tank 8 through the oil outlet device 11. The oil pump is connected to an oil extraction pipe 12 and an oil delivery pipe 13. The oil extraction pipe 12 is connected to the oil inlet device 4, and the oil delivery pipe 13 works in conjunction with the extrusion assembly 7. The control console 2 connects and controls the oil pump, the first drive device 9, the second drive device 10, and the oil outlet device 11.

[0043] In the above technical solution, the edible oil extracted by the oil press is pumped into the oil inlet device 4 through a pipeline, and the edible oil in the oil inlet device 4 is pumped into the extrusion assembly 7 by the oil pump, and then flows out from the extrusion assembly 7 into the centrifugal assembly 6.

[0044] The centrifugal assembly 6 is driven to rotate at high speed by the first driving device 9, with a rotation speed of 1500~3000 rpm. Under the high-speed rotation of the centrifugal assembly 6, solid particles in the edible oil are adhered to the inner wall of the centrifugal assembly 6.

[0045] The extrusion component 7 rotates at a slow speed, which is lower than the rotational speed of the centrifugal component 6.

[0046] The difference in rotation speed causes the extrusion assembly 7 to push out the solid particles adhering to the inner wall of the centrifugal assembly 6, while the liquid edible oil gathers on the left side of the centrifugal assembly 6 and is extracted through the oil outlet device 11.

[0047] The above-mentioned equipment can separate edible oil from residue and push out the separated residue.

[0048] See Figure 3 As shown, the oil inlet device 4 includes an oil inlet tank 41, an inner tube 42, a diversion hood 43, and an electric heater 44. The bottom of the oil inlet tank 41 is machined into a conical gathering part 45. A connecting pipe 46 is welded to the bottom axis of the gathering part 45. The inner tube 42 is threaded to the axis of the gathering part 45. A groove is machined on the outer wall of the inner tube 42, and a filter screen 47 is welded in the groove. The diversion hood 43 is frustum-shaped, and its diameter gradually decreases upward. A connecting part 48 is installed at the bottom axis of the diversion hood 43. The connecting part 48 is inserted into the upper end of the inner tube 42 and fixed. The electric heater 44 is connected to an electric heating tube 441. The edible oil diverted by the diversion hood 43 falls and contacts the electric heating tube 441. The oil extraction pipe 12 is connected to the connecting pipe 46. The outer wall of the connecting part 48 is provided with a plurality of overflow holes 481, which are exposed above the inner tube body 42.

[0049] In the above technical solution, the heating temperature of the electric heating tube 441 is 70~80 degrees Celsius. By heating the crude oil, the viscosity of the oil can be reduced, which facilitates subsequent centrifugal separation.

[0050] In the above technical solution, crude oil is temporarily stored in oil tank 41. When the crude oil is pumped by the oil pump, the crude oil needs to pass through filter screen 47 so that large particles in the crude oil are passively separated out, reducing the chance of pipeline blockage.

[0051] The design of the flow divider 43 allows the incoming crude oil to first come into contact with the heating element 441, improving the heating efficiency of the crude oil. When the liquid level exceeds the heating element 441, this method of dispersing the crude oil into the oil can make the temperature of the crude oil in the oil inlet 41 more uniform.

[0052] The overflow hole 481 is designed so that when the filter screen is clogged, the oil level in the oil tank 41 rises and can overflow in an emergency when it rises to the overflow hole 481.

[0053] See Figure 1 , Figure 3 and Figure 4 As shown, an oil inlet pipe 442 is installed at the axis of the oil inlet tank 41. A bracket 443 is fixed between the oil inlet pipe 442 and the oil inlet tank 41. The oil inlet pipe 442 is coaxial with the flow divider 43. A concave hole 444 is machined on the top of the flow divider 43. A filter cylinder 445 is fixed in the concave hole 444. The oil inlet pipe 442 delivers oil into the filter cylinder 445.

[0054] In the above technical solution, crude oil is transported to the center of the distribution shroud 43 through the oil inlet pipe 442. When the crude oil is transported, it is first filtered through the filter cylinder 445. After flowing out from the filter hole of the filter cylinder 445, the crude oil is evenly distributed along the distribution shroud 43.

[0055] The filter pore size of filter cartridge 445 is larger than that of filter screen 47.

[0056] In this embodiment, the filter cylinder 445 has a filter pore size of 20-30 mesh, and the filter screen 47 has a filter pore size of 40-60 mesh.

[0057] See Figure 1 and Figure 2 As shown, the centrifugal assembly 6 includes a centrifugal cylinder 61 and a discharge box 62. A hollow shaft 63 is provided at one end of the centrifugal cylinder 61. A conical barrel 64 is fixedly installed at the end of the centrifugal cylinder 61 away from the hollow shaft 63. The diameter of the conical barrel 64 gradually decreases in the direction away from the centrifugal cylinder 61. The end of the conical barrel 64 is inserted into the discharge box 62. The extrusion assembly 7 passes through the discharge box 62 and is then inserted into the centrifugal cylinder 61. The discharge box 62 is fixed to the machine body structure 1, and there is a rotatable fit between the discharge box 62 and the conical barrel 64. The rotational fit is achieved through the cooperation of the bearing and the shaft seal. The shaft seal is sealed inside the bearing. The hollow shaft 63 is rotatably fitted with the machine body structure 1. The rotational fit is supported by the bearing. The oil outlet device 11 is installed via the hollow shaft 63. The first drive device 9 is connected to drive the hollow shaft 63. The first drive device 9 is specifically a drive motor. The drive motor and the hollow shaft 63 are connected by a synchronous toothed belt. The slag outlet box 62 has a slag outlet channel 662 welded downwards on its outer side. The slag outlet channel 662 extends to the outside of the machine body structure 1.

[0058] In the above technical solution, the slag discharge box 62 is fixed to the machine body structure 1 and the bin cover 3 by a bracket. In addition to removing slag, the slag discharge box 62 can also center the centrifuge cylinder 61 that is rotating at high speed, making the centrifuge cylinder 61 more stable when rotating at high speed.

[0059] The conical barrel 64 design ensures that the separated edible oil can only flow towards the oil outlet 11 under the influence of gravity.

[0060] See Figure 5 As shown, an annular recess 661 is machined on the outer wall of the centrifuge cylinder 61 at a position away from the conical barrel 64. Edible oil separated under the centrifugal force of the centrifuge cylinder 61 is collected in the annular recess 661, and the oil outlet device 11 is used in conjunction with the annular recess 661.

[0061] The design of the annular recess 661 can better collect the edible oil after separation, so that the oil outlet device 11 can extract it.

[0062] See Figures 5 to 10As shown, the oil outlet device 11 includes an oil outlet pipe 111, a push rod 112, and a three-axis cylinder 113. The oil outlet pipe 111 is coaxially inserted into the hollow shaft 63. The oil outlet pipe 111 and the hollow shaft 63 are rotatably engaged. The rotatable engagement is accomplished by the engagement of a bearing and a shaft seal. The shaft seal is sealed inside the bearing. This structure allows the hollow shaft 63 to rotate while the oil outlet pipe 111 remains stationary.A bracket 114 is fixedly installed between the oil outlet pipe 111 and the machine body structure 1. A first connecting pipe 115 is provided on the side of the oil outlet pipe 111, and a first oil pump 116 is connected to the first connecting pipe 115. The first oil pump 116 is connected to a three-way valve 117, and a first oil outlet pipe 118 and a return pipe 119 are connected through the three-way valve 117. A control valve 120 is installed on the three-way valve 117, one of which corresponds to the first oil outlet pipe 118, and the other corresponds to the return pipe 119. The end of the return pipe 119 is inserted into the oil inlet device 4. The first oil outlet pipe 118 corresponds to the storage tank. 8. The triaxial cylinder 113 is fixedly installed via the bracket body 114. A connecting plate 121 is fixed to the outside of the push rod 112. The connecting plate 121 is fixed to the movable end of the triaxial cylinder 113. The push rod 112 is coaxial with the oil outlet pipe 111. The push rod 112 is inserted into the oil outlet pipe 111. The push rod 112 and the oil outlet pipe 111 are clearance-fitted, and edible oil passes through the gap. A pipe cap 122 is threaded to the end of the oil outlet pipe 111. A sealing ring 123 is sandwiched between the pipe cap 122 and the oil outlet pipe 111. The push rod 112 passes through the sealing ring 123 and forms a seal with the sealing ring 123. The oil outlet pipe 111 passes through... A hollow shaft 63 is inserted into the centrifuge cylinder 61. A housing 124 is provided at the end of the oil outlet pipe that inserts into the centrifuge cylinder. A housing cover 125 is detachably installed at the end of the housing 124. Two or more sleeves 126 are arranged annularly on the outer wall of the housing 124. A movable tube 127 is slidably installed inside the sleeve 126. Both ends of the movable tube 127 have spherical transitions, and through holes 128 are provided on the spherical surfaces at both ends of the movable tube 127. A limit cap 129 is installed at the opening of the sleeve 126. A limit ring 130 is fixedly installed at the position of the movable tube 127 within the sleeve 126. A first sealing ring 130 is engaged on the outer wall of the limit ring 130. A sealing ring 131 is provided, forming a seal between the first sealing ring 131 and the inner wall of the sleeve 126. A spring 132 is sleeved on the movable tube 127, and the spring 132 acts between the limiting cap 129 and the limiting ring 130. Under the action of the spring 132, the movable tube 127 slides towards the inside of the sleeve 126. The push rod 112 is inserted into the housing 124, and a push block 133 is fixed at the end of the push rod 112 that is inserted into the housing 124. The push block 133 has an outer conical surface 134, which acts on the spherical surface of the movable tube 127. The outer end of the movable tube 127 is located in the annular recess 661.

[0063] The specific oil dispensing method of the oil dispensing device 11 is as follows:

[0064] By adjusting the position of the push rod 112 through the movement of the three-axis cylinder 113, the push block 133 acts on the outer end face of the movable tube 127. At this time, the external through hole 128 is located in the annular recess 661, but the spherical end of the movable tube 127 does not contact the inner wall of the annular recess 661. Under the high-speed rotation of the centrifuge cylinder 61, the edible oil is separated from the solid particles. The solid particles are pushed out to the slag box 62 by the extrusion component 7, while the liquid edible oil flows into the annular recess 661. Through the operation of the first oil pump 116, a negative pressure is generated at the through hole 128, which pumps out the edible oil that has accumulated in the annular recess 661.

[0065] The design of the separate control valve 120 allows for direct oil return when the particulate matter content in the separated edible oil exceeds the standard. The edible oil is then injected into the oil inlet device 4 for direct secondary separation.

[0066] See Figure 10 and Figure 11 As shown, a bristle seat 14 is fixedly installed on the outer wall of the movable tube 127. Bristles 144 are distributed in a ring on the outer end face of the bristle seat 14. The spherical end of the movable tube 127 is located at the center of the multiple bundles of bristles 144. After the movable tube 127 extends outward, the bristles 144 act on the inner wall of the annular recess 661.

[0067] In the above technical solution, by continuing to move the push block 133 outward, the movable tube 127 is pushed outward, so that the bristles 144 remain in contact with the inner wall of the annular recess 661, and the device enters the cleaning mode.

[0068] In cleaning mode, high-temperature water is injected into the oil inlet device 4. The water is pumped into the extrusion assembly 7 by the oil pump and flows out from the extrusion assembly 7 into the centrifuge drum 61. Under the flushing of the high-temperature water, the centrifuge drum 61 rotates at a speed of 500 rpm. The fine solid particles attached are washed off by the contact between the bristles 144 and the annular recess 661. The wastewater washed off is pumped out by the first oil pump 116 until the water flowing out from the first oil outlet pipe 118 is clean.

[0069] After cleaning, push block 133 retracts, causing the spring to spring back and retract movable tube 127 to its original position.

[0070] The brush bristles are made of coarse bristles with a diameter greater than 0.8mm. Even if the bristles fall off, you can easily separate them by adding a filter screen at the oil outlet.

[0071] See Figure 2 and Figure 12As shown, the extrusion assembly 7 includes an extrusion roller 71. One end of the extrusion roller 71 passes through the slag discharge box 62 and extends into the centrifuge cylinder 61, and this end is closed. The other end of the extrusion roller 71 is fixed to a first hollow shaft 72. A second drive device 10 is connected to drive the first hollow shaft 72. The second drive device 10 is a drive motor. The second drive device 10 and the first hollow shaft 72 are also driven by a synchronous toothed belt. The first hollow shaft 72 is rotatably engaged with the machine body structure 1, and the rotatable engagement is supported by bearings. The extrusion roller 71 is also rotatably engaged with the slag discharge box 62, and this rotatable engagement is achieved through the engagement of bearings and shaft seals. The completed shaft seal is located inside the bearing. With the support of the double bearing, the rotation of the extrusion roller 71 is more stable. A straight tube 73 is inserted inside the first hollow shaft 72. The straight tube 73 is rotatably engaged with the first hollow shaft 72. A first support body 74 is fixed between the straight tube 73 and the machine body structure 1. One end of the straight tube 73 is inserted to the middle position of the extrusion roller 71, and the other end of the straight tube 73 is connected to the oil delivery pipe 13. A spiral blade 75 is fixed on the outer wall of the extrusion roller 71. The spiral blade 75 is attached to the inner wall of the centrifuge cylinder 61 and the conical barrel 64. Multiple conical oil nozzles 76 are distributed in a ring on the outer wall of the extrusion roller 71.

[0072] In the above technical solution, the rotation of the extrusion roller 71 drives the spiral blade 75 to run at a speed lower than that of the centrifuge cylinder 61. Under the high-speed rotation of the centrifuge cylinder 61, solid particles adhere to the inner wall of the centrifuge cylinder and the conical barrel. The rotation of the spiral blade 75 pushes out this part of the residue, while the liquid edible oil is collected at the left end of the centrifuge cylinder 61 along the spiral channel of the spiral blade 75.

[0073] The rotation speed of the spiral blade 75 is set according to the fluidity of the edible oil. During the equipment debugging stage, the centrifuge cylinder 61 is kept rotating at high speed, and the rotation speed of the spiral blade 75 is adjusted separately. When the rotation of the spiral blade 75 pushes the edible oil out of the residue box 62, it means that the rotation speed of the spiral blade 75 is too high and needs to be reduced.

[0074] See Figure 2 As shown, the extrusion roller 71 is provided with multiple dispersing plates 771 in a ring at the position corresponding to the slag discharge box 62.

[0075] The dispersing plate 771 is designed to disperse the residue when it is agglomerated and pushed out, so that the residue can leak out from the slag discharge box 62.

[0076] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A centrifugal filtration device for edible oil, comprising a body structure (1) and a control console (2) for adjusting the rotation speed, wherein a bin cover (3) is installed on the upper end of the body structure (1), and the control console (2) is integrated on the bin cover (3), characterized in that: It also includes an oil inlet device (4), an oil pump, a centrifugal assembly (6), an extrusion assembly (7), a storage tank (8), a first drive device (9), a second drive device (10), and an oil outlet device (11). The extrusion assembly (7) is coaxially mounted with the centrifugal assembly (6). Both the centrifugal assembly (6) and the extrusion assembly (7) are rotatably mounted with the machine body structure (1). The first drive device (9) drives the centrifugal assembly (6) to rotate at high speed, and the second drive device (10) drives the extrusion assembly (7) to rotate at low speed. Rotation causes the waste residue generated during oil filtration to be carried out from the centrifugal assembly (6) through the extrusion assembly (7), and the filtered edible oil to be drawn into the storage tank (8) through the oil outlet device (11). The oil pump is connected to the oil extraction pipe (12) and the oil delivery pipe (13). The oil extraction pipe (12) is connected to the oil inlet device (4), and the oil delivery pipe (13) is used in conjunction with the extrusion assembly (7). The control console (2) is connected to control the oil pump, the first drive device (9), the second drive device (10), and the oil outlet device (11). The centrifugal assembly (6) includes a centrifugal cylinder (61) and a slag discharge box (62). A hollow shaft (63) is provided at one end of the centrifugal cylinder (61). A conical barrel (64) is fixedly installed at the end of the centrifugal cylinder (61) away from the hollow shaft (63). The diameter of the conical barrel (64) gradually decreases in the direction away from the centrifugal cylinder (61). The end of the conical barrel (64) is inserted into the slag discharge box (62). The extrusion assembly (7) passes through the slag discharge box (62) and then inserts into the centrifugal cylinder (61). Inside the machine body (1), the slag discharge box (62) is fixed to the machine body structure (1), the slag discharge box (62) is rotatably engaged with the conical barrel (64), the hollow shaft (63) is rotatably engaged with the machine body structure (1), the oil discharge device (11) is installed via the hollow shaft (63), and the first drive device (9) is connected to drive the hollow shaft (63); the slag discharge box (62) is inclined downward welded to the outside of the slag discharge box (62), and the slag discharge channel (662) passes through the outside of the machine body structure (1); An annular recess (661) is machined on the outer wall of the centrifuge cylinder (61) at a position away from the conical barrel (64). Edible oil separated by the centrifugal force of the centrifuge cylinder (61) is collected in the annular recess (661). The oil outlet device (11) is used in conjunction with the annular recess (661). The oil outlet device (11) includes an oil outlet pipe (111), a push rod (112), and a three-axis cylinder (113). The oil outlet pipe (111) is coaxially inserted into the hollow shaft (63). The oil outlet pipe (111) and the hollow shaft (63) are rotatably coupled. A bracket (114) is fixedly installed between the oil outlet pipe (111) and the machine body structure (1). A first connecting pipe (115) is provided on the side of the oil outlet pipe (111). A first oil pump (116) is connected to a first connecting pipe (115). The first oil pump (116) is connected to a three-way valve (117). A first oil outlet pipe (118) and a return pipe (119) are connected to the three-way valve (117). A control valve (120) is installed on the three-way valve (117), one of which corresponds to the first oil outlet pipe (118), and the other corresponds to the return pipe (119). 119), the end of the return oil pipe (119) is inserted into the oil inlet device (4); the first oil outlet pipe (118) corresponds to the storage tank (8), the three-axis cylinder (113) is fixedly installed through the bracket body (114), the push rod (112) is fixed with a connecting plate (121) on the outside, the connecting plate (121) is fixed to the movable end of the three-axis cylinder (113), and the push rod (112) is connected to the oil outlet pipe (111). Coaxial, the push rod (112) is inserted into the oil outlet pipe (111), the push rod (112) and the oil outlet pipe (111) are in clearance fit, the edible oil passes through the gap, the end of the oil outlet pipe (111) is threaded with a pipe cap (122), a sealing ring (123) is sandwiched between the pipe cap (122) and the oil outlet pipe (111), the push rod (112) passes through the sealing ring (123) and forms a seal with the sealing ring (123);The oil outlet pipe (111) passes through the hollow shaft (63) into the centrifuge cylinder (61). A housing (124) is provided at the end of the oil outlet pipe that passes through the centrifuge cylinder. A cover (125) is detachably installed at the end of the housing (124). Two or more sleeves (126) are arranged in a ring around the outer wall of the housing (124). A movable tube (127) is slidably installed inside the sleeve (126). Both ends of the movable tube (127) are spherically transitioned. Through holes (128) are provided on the spherical surfaces at both ends of the movable tube (127). A limit cap (129) is installed at the opening of the sleeve (126). A limit ring (130) is fixedly provided at the position of the movable tube (127) inside the sleeve (126). A first limit ring (130) is clamped on the outer wall of the limit ring (130). A sealing ring (131) forms a seal with the inner wall of the sleeve (126). A spring (132) is sleeved on the movable tube (127). The spring (132) acts between the limiting cap (129) and the limiting ring (130). Under the action of the spring (132), the movable tube (127) slides towards the inside of the sleeve (126). The push rod (112) is inserted into the housing (124). A push block (133) is fixed at the end of the push rod (112) that is inserted into the housing (124). The push block (133) has an outer conical surface (134). The outer conical surface (134) acts on the spherical surface of the movable tube (127). The outer end of the movable tube (127) is located in the annular recess (661).

2. The edible oil centrifugal filtration device according to claim 1, characterized in that: The oil inlet device (4) includes an oil inlet tank (41), an inner tube (42), a flow divider (43), and an electric heater (44). The bottom of the oil inlet tank (41) is machined into a conical gathering part (45). A connecting pipe (46) is welded to the bottom axis of the gathering part (45). The inner tube (42) is threaded to the axis of the gathering part (45). A groove is machined on the outer wall of the inner tube (42), and a filter screen (47) is welded in the groove. The flow divider (43) is frustum-shaped, and its diameter gradually decreases upward. The bottom axis of the diversion shroud (43) is equipped with a connecting part (48), which is inserted into the upper end of the inner tube (42) and fixed. The electric heater (44) is connected to the electric heating tube (441). The edible oil diverted by the diversion shroud (43) falls and contacts the electric heating tube (441). The oil extraction tube (12) is connected to the connecting tube (46). Multiple overflow holes (481) are provided on the outer wall of the connecting part (48), and the overflow holes (481) are exposed above the inner tube (42).

3. The edible oil centrifugal filtration device according to claim 2, characterized in that: An oil inlet pipe (442) is installed at the center of the oil inlet tank (41). A bracket (443) is fixed between the oil inlet pipe (442) and the oil inlet tank (41). The oil inlet pipe (442) is coaxial with the flow divider (43). A concave hole (444) is machined on the top of the flow divider (43). A filter cylinder (445) is fixed in the concave hole (444). The oil inlet pipe (442) delivers oil into the filter cylinder (445).

4. The edible oil centrifugal filtration device according to claim 1, characterized in that: A bristle seat (14) is fixedly installed on the outer wall of the movable tube (127). Bristles (144) are distributed in a ring on the outer end face of the bristle seat (14). The spherical end of the movable tube (127) is located at the center of the multiple bundles of bristles (144). After the movable tube (127) extends outward, the bristles (144) act on the inner wall of the annular recess (661).

5. The edible oil centrifugal filtration device according to claim 1, characterized in that: The extrusion assembly (7) includes an extrusion roller (71), one end of which passes through the slag discharge box (62) and extends into the centrifuge cylinder (61), and this end is closed. The other end of the extrusion roller (71) is fixed with a first hollow shaft (72). The second drive device (10) drives the first hollow shaft (72). The first hollow shaft (72) is rotatably engaged with the machine body structure (1). The extrusion roller (71) is also rotatably engaged with the slag discharge box (62). A straight tube (73) is inserted inside the first hollow shaft (72). (73) Rotatably engages with the first hollow shaft (72), and a first support body (74) is fixed between the straight tube (73) and the machine body structure (1). One end of the straight tube (73) is inserted into the middle position of the extrusion roller (71), and the other end of the straight tube (73) is connected to the oil delivery pipe (13). A spiral blade (75) is fixed on the outer wall of the extrusion roller (71). The spiral blade (75) is attached to the inner wall of the centrifuge cylinder (61) and the conical barrel (64). Multiple conical oil nozzles (76) are distributed in a ring on the outer wall of the extrusion roller (71).

6. The edible oil centrifugal filtration device according to claim 5, characterized in that: The extrusion roller (71) is provided with multiple dispersing plates (771) in a ring at the position corresponding to the slag box (62).

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