A black soybean oil extractor and a method for extracting black soybean oil

Abstract

The invention provides a black soybean oil extractor and an extraction method, comprising a mounting frame, on which an oil pressing cylinder with a protective cylinder on the outer side is fixed, one end of the protective cylinder is provided with a hopper which is connected with the inner space of the oil pressing cylinder for supplying oil, the oil pressing cylinder is driven by a driving wheel on one side and is connected with a driving motor for transmission, a negative pressure mechanism is fixed on the outer side of the oil pressing cylinder, a negative pressure environment is formed on the outer side of the oil pressing cylinder to actively extract the oil, an active pressurizing mechanism is also provided on one side of the oil pressing cylinder, which is connected with the inner side of the oil pressing cylinder to form a high-pressure environment on the inner side of the oil pressing cylinder, a guide plate is provided on the mounting frame at the lower side of the negative pressure mechanism to collect the oil, and a slag frame is provided at the tail end of the oil pressing cylinder to collect the waste slag, the invention forms a pressure difference between the inner and outer sides through the negative pressure mechanism on the outer side of the oil pressing cylinder and the active pressurizing mechanism at one end, drives the oil between the bean dregs to flow and precipitate, improves the oil yield of black beans, and has good development prospects.

Description

Technical Field

[0001] The invention relates to the field of soybean oil production, in particular to a black soybean oil extractor and an extracting method. Background Art

[0002] Black bean oil is made from black beans and squeezed out. The virgin oil is dark green, and the refined oil is transparent yellow. It is a kind of edible oil. It can be eaten and used as medicine. Due to the characteristics of black beans, a screw press is usually used to squeeze soybean oil.

[0003] The existing screw oil press mainly squeezes the oil by squeezing the oil material through the screw rod and the outer cylinder wall. For example, a sesame oil production pressing equipment with application number CN202210827203.2 presses the oil through a fixed oil pressing pipe and a spiral oil pressing piece arranged in the oil pressing pipe. However, a large amount of oil will still remain in the gaps between the residues of the oil material, which cannot be extracted by relying on gravity and the squeezing effect of the spiral oil pressing piece, resulting in a decrease in the overall oil yield, a decrease in output rate, an increase in the overall production cost, and a waste of raw materials. Summary of the invention

[0004] The purpose of the present invention is to provide a black soybean oil extractor and a pressing method which can improve the oil yield by assisting oil extraction through negative pressure extraction.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A black soybean oil extractor comprises a mounting frame, on which an oil pressing cylinder with a protective cylinder on the outside is fixed, one end of the protective cylinder is provided with a hopper which is connected with the inner space of the oil pressing cylinder for supplying oil, the oil pressing cylinder is driven by a driving wheel on one side and is connected with a driving motor for transmission, a negative pressure mechanism is fixed on the outside of the oil pressing cylinder to form a negative pressure environment on the outside of the oil pressing cylinder to actively extract the oil, a guide plate is provided on the mounting frame on the lower side of the negative pressure mechanism to collect the oil, and a slag frame is provided at the tail end of the oil pressing cylinder to collect waste slag.

[0007] As a further solution of the present invention: the negative pressure mechanism includes a negative pressure cylinder, a one-way valve, and a piston ring driven by a hydraulic rod. The negative pressure cylinder is a metal cylinder with a diameter larger than that of the oil pressing cylinder. It is mounted on the outside of the oil pressing cylinder and is connected to the space inside the oil pressing cylinder through a one-way oil outlet hole arranged on the circumference of the oil pressing cylinder. A piston ring is slidably arranged between the negative pressure cylinder and the oil pressing cylinder. The piston ring is driven by the extension and contraction of a hydraulic rod fixed on the end face of the negative pressure cylinder to divide the space inside the negative pressure cylinder. One-way valves from the negative pressure cylinder to the outside are arranged at both ends of the separated negative pressure cylinder.

[0008] As a further solution of the present invention: the structural length of the piston ring along the axial direction of the oil pressing cylinder is greater than the axial length of the oil outlet hole of the oil pressing cylinder.

[0009] As a further solution of the present invention: a mounting connecting rod is arranged across the center of the oil outlet hole of the oil press cylinder, a membrane flap is fixed on the mounting connecting rod by a fixing pin, and the membrane flap is limited to one-way opening from inside to outside by a protruding structure on the outer edge of the oil outlet hole.

[0010] As a further solution of the present invention: the oil outlet hole located on the upper half of the oil pressing cylinder is connected to the lower half through the arc-shaped groove on the peripheral surface of the oil pressing cylinder.

[0011] As a further solution of the present invention: the space inside the negative pressure cylinder is divided into a negative pressure chamber and a diversion chamber. The negative pressure chamber is a cylindrical space formed with the oil pressing cylinder. Axially protruding fan-shaped diversion chambers are provided at both ends of the negative pressure chamber, and the one-way valve is connected to the diversion chamber position.

[0012] As a further solution of the present invention: a group of second electrically controlled valves communicating with the inside of the negative pressure cylinder are arranged at the position of the one-way valve at the bottom side of the negative pressure cylinder.

[0013] As a further solution of the present invention: the spiral auger in the oil pressing barrel is a hollow structure, one end of which is connected to the active pressurizing mechanism, the circumferential surface of the spiral auger is provided with an air groove which is connected to the space inside the oil pressing barrel, the active pressurizing mechanism includes an air intake pipe, a first electric control valve and a rotary joint, the air intake pipe is connected to the external high-pressure air circuit, the air intake pipe is connected in series with the first electric control valve to control the on-off of the air circuit, and the tail end of the air intake pipe is connected to the spiral auger through a rotary joint and is connected to the air circuit.

[0014] As a further solution of the present invention: the guide plate includes an oil collecting frame, an oil guide nozzle and a filter plate. The oil collecting frame is a frame structure arranged on the lower side of the oil pressing cylinder, and an oil guide nozzle for oil outlet is arranged on one side. A filter plate with holes at the bottom is inserted and fixed at the oil guide nozzle position.

[0015] A method for extracting black soybean oil using the above-mentioned extractor comprises the following steps:

[0016] S1: After sieving the black bean raw material and removing dust, the raw material is introduced into a preheated dryer to evaporate excess water in the black bean. After drying, the raw material is introduced into a frying machine, and is turned over and fried at high temperature for uniform heating;

[0017] S2: After the extractor is preheated, the roasted black beans are added through the top hopper while they are still hot, the oil pressing cylinder is started to extract the black beans, and the negative pressure mechanism on the outside and the active pressure mechanism on one end are simultaneously started to use the pressure difference between the inside and outside to drive the oil between the bean dregs to flow and precipitate, and the oil is finally discharged and collected through the bottom guide plate;

[0018] S3: The black soybean oil after primary pressing is introduced into a filter to filter out impurities from the residue machine;

[0019] S4: The filtered black soybean oil is introduced into a cooling cylinder to cool the temperature.

[0020] Beneficial Effects

[0021] 1. A negative pressure mechanism is fixedly mounted on the outer side of the oil pressing cylinder of the present invention. The negative pressure mechanism includes a negative pressure cylinder, a one-way valve, and a reciprocating piston ring. The axial reciprocating motion of the piston ring is used to compress the space on one side of the negative pressure cylinder, and the gas and oil are discharged through the one-way valve, while the volume of the space on the opposite side is expanded, and the air pressure per unit volume is reduced, thereby forming a negative pressure environment on the outer side of the oil pressing cylinder, forming a movement trend from the space inside the oil pressing cylinder to the space inside the negative pressure cylinder, which plays a role in strengthening the effect of oil extraction and improving the oil yield.

[0022] 2. The oil outlet holes on the upper half of the oil press cylinder of the present invention are connected to the lower half through the arc-shaped grooves on the peripheral surface of the oil press cylinder. The groove structure connecting the oil outlet holes can be used to guide and discharge the oil that cannot be discharged under the action of gravity at the edge gaps of the oil outlet holes on the upper half, thereby avoiding oil residue.

[0023] 3. The space inside the negative pressure cylinder of the present invention is divided into a negative pressure chamber and a guide chamber. The negative pressure chamber is a cylindrical space formed with the oil pressing cylinder. Axially protruding fan-shaped guide chambers are arranged at both ends of the negative pressure chamber. The one-way valve is connected to the guide chamber. Through the arrangement of the guide chambers on both sides, it can not only guide the residual oil when the piston ring runs to the end position of the stroke, and facilitate the discharge of the oil, but also reserve a certain space for retaining some gas to prevent the piston ring from moving to the end face position of the negative pressure cylinder, and forming a vacuum environment after the gas inside the negative pressure cylinder end face is exhausted, which creates resistance for the reset of the piston ring, thereby ensuring the normal reset of the piston ring.

[0024] 4. The spiral auger in the oil pressing barrel of the present invention is a hollow structure, one end of which is connected to the active pressurizing mechanism. The circumferential surface of the spiral auger is provided with an air groove connected to the space inside the oil pressing barrel. The active pressurizing mechanism includes an air inlet pipe, a first electrically controlled valve and a rotary joint. The air inlet pipe is connected to the external high-pressure air circuit. The air inlet pipe is connected in series with the first electrically controlled valve to control the on-off of the air circuit. The tail end of the air inlet pipe is rotatably connected to the spiral auger through a rotary joint and is connected to the air circuit. High-pressure gas is introduced into the spiral auger side, i.e., the inner side of the bean dregs, through the air inlet pipe. The oil remaining between the bean dregs is driven by the pressure difference and the flow of gas, thereby accelerating the oil precipitation efficiency and improving the extraction effect of the residual oil, thereby improving the overall oil yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0026] Figure 2 For the present invention Figure 1 A schematic diagram of the enlarged structure of .

[0027] Figure 3 It is a schematic diagram of the installation of the negative pressure mechanism of the present invention.

[0028] Figure 4 It is a schematic diagram of the structure of the oil pressing cylinder of the present invention.

[0029] Figure 5 It is a schematic diagram of the oil outlet structure of the oil press cylinder of the present invention.

[0030] Figure 6 It is a schematic diagram of the structure of the negative pressure mechanism of the present invention.

[0031] Figure 7 It is a schematic diagram of the piston ring structure of the present invention.

[0032] Figure 1-7 In: 1-mounting frame, 2-protection cylinder, 3-hopper, 4-oil pressing cylinder, 41-mounting connecting rod, 41-membrane flap, 42-fixing pin, 5-driving wheel, 6-driving motor, 7-rotating joint, 8-intake pipe, 9-first electric control valve, 10-negative pressure cylinder, 101-negative pressure chamber, 102-guide chamber, 11-hydraulic rod, 12-piston ring, 13-check valve, 14-second electric control valve, 15-guide plate, 151-oil collecting frame, 152-oil guide nozzle, 153-filter plate, 16-slag frame. DETAILED DESCRIPTION

[0033] The following will be combined with the accompanying drawings in the present invention Figure 1-Figure 7 , clearly and completely describe the specific technical solutions of the present invention;

[0034] See also Figure 1-Figure 7 , Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 For the present invention Figure 1 A schematic diagram of the structure at A; Figure 3 It is a schematic diagram of the installation of the negative pressure mechanism of the present invention; Figure 4 It is a schematic diagram of the structure of the oil pressing cylinder of the present invention; Figure 5 This is a schematic diagram of the oil outlet structure of the oil press cylinder of the present invention; Figure 6 It is a schematic diagram of the structure of the negative pressure mechanism of the present invention; Figure 7 It is a schematic diagram of the piston ring structure of the present invention.

[0035] A black soybean oil extractor provided in the present embodiment includes a mounting frame 1, on which an oil pressing cylinder 4 with a protective cylinder 2 on the outside is fixed, one end of the protective cylinder 2 is provided with a hopper 3 which is connected with the inner space of the oil pressing cylinder 4 for supplying oil, the oil pressing cylinder 4 is driven by a driving wheel 5 on one side and a driving motor 6, a negative pressure mechanism is fixed on the outside of the oil pressing cylinder 4, a negative pressure environment is formed on the outside of the oil pressing cylinder 4 to actively extract the oil, a guide plate 15 is provided on the mounting frame 1 on the lower side of the negative pressure mechanism 4 to collect the oil, and a slag frame 16 is provided at the tail end of the oil pressing cylinder 4 to collect the waste slag.

[0036] The negative pressure mechanism includes a negative pressure cylinder 10, a one-way valve 13, and a piston ring 12 driven by a hydraulic rod 11. The negative pressure cylinder 10 is a metal cylinder with a diameter larger than that of the oil pressing cylinder 4. It is sleeved on the outside of the oil pressing cylinder 4 and communicates with the inner space of the oil pressing cylinder 4 through a one-way oil outlet hole arranged on the circumference of the oil pressing cylinder 4. A piston ring 12 is slidably arranged between the negative pressure cylinder 10 and the oil pressing cylinder 4. The piston ring 12 is driven by the extension and contraction of a hydraulic rod 11 fixed on the end face of the negative pressure cylinder 10 to separate the inner space of the negative pressure cylinder 10. Both ends of the separated negative pressure cylinder 10 are provided with one-way valves 13 from the negative pressure cylinder 10 to the outside.

[0037] By setting the negative pressure mechanism on the outside of the squeezing cylinder and utilizing the axial movement of the piston ring 12, the space on one side of the negative pressure cylinder 10 is compressed, and the gas and oil are discharged through the one-way valve 13, while the volume of the space on the opposite side is expanded, and the gas pressure per unit volume is reduced, thereby forming a negative pressure environment on the outside of the oil pressing cylinder 4, forming a movement trend from the space inside the oil pressing cylinder 4 to the space inside the negative pressure cylinder 10, which plays a role in strengthening the effect of oil extraction and improving the oil yield.

[0038] Specifically, the structural length of the piston ring 12 along the axial direction of the oil pressing cylinder 4 is greater than the axial length of the oil outlet hole of the oil pressing cylinder 4. By limiting the length data of the oil outlet hole and the piston ring 12, it is ensured that the oil outlet hole is always on one side of the piston ring 12, and the negative pressure chamber 101 cannot achieve communication between the cavities on both sides through the overly long oil outlet hole, thereby preventing the loss of the negative pressure environment after the cavities on both sides are connected, thereby ensuring the stability of the negative pressure environment.

[0039] Specifically, a mounting connecting rod 41 is arranged across the center of the oil outlet hole of the oil pressing cylinder 4, and a diaphragm 42 is fixed on the mounting connecting rod 41 by a fixing pin 43. The diaphragm 42 is limited to be opened one-way from the inside to the outside by a protruding structure on the outer edge of the oil outlet hole, thereby realizing one-way connection of the oil outlet hole. When the piston ring 12 moves, the oil outlet hole on the compressed side will be closed under the action of pressure to prevent the oil from flowing back into the oil pressing cylinder 4.

[0040] Specifically, the oil outlet hole located on the upper half of the oil pressing cylinder 4 is connected to the lower half through the arc-shaped groove on the peripheral surface of the oil pressing cylinder 4;

[0041] The groove structure is used to guide and discharge the oil that cannot be discharged under the action of gravity at the edge gap of the oil outlet hole on the upper half side, thereby avoiding oil residue.

[0042] Specifically, the space inside the negative pressure cylinder 10 is divided into a negative pressure chamber 101 and a diversion chamber 102. The negative pressure chamber 101 is a cylindrical space formed with the oil pressing cylinder 4. Both ends of the negative pressure chamber 101 are provided with axially protruding fan-shaped diversion chambers 102. The one-way valve 13 is connected to the diversion chamber 102.

[0043] By setting the guide chambers 102 on both sides, it can not only play a guiding role for the residual oil when the piston ring 12 runs to the end position of the stroke, thereby facilitating the discharge of the oil, but also reserve a certain space for retaining some gas to prevent the piston ring 12 from moving to the end face position of the negative pressure cylinder 10, and from forming a vacuum environment after the gas inside is exhausted after the piston ring 12 is in contact with the end face of the negative pressure cylinder 10, which creates resistance for the reset of the piston ring 12, thereby ensuring the normal reset of the piston ring 12.

[0044] Specifically, a set of second electrically controlled valves 14 connected to the negative pressure cylinder 10 is arranged at the position of the one-way valve 13 on the bottom side of the negative pressure cylinder 10. The setting of the second electrically controlled valve 14 at the bottom is used to discharge the residual oil in the negative pressure cylinder 10 when the one-way valve 13 loses its pressure and is closed after the operation of the device is completed.

[0045] Among them, the spiral auger in the oil pressing cylinder 4 is a hollow structure, one end of which is connected to the active pressurizing mechanism, the circumference of the spiral auger is provided with an air groove which is connected to the space in the oil pressing cylinder 4, the active pressurizing mechanism includes an air inlet pipe 9, a first electric control valve 8 and a rotary joint 7, the air inlet pipe 7 is connected to the external high-pressure air circuit, the air inlet pipe 7 is connected in series with the first electric control valve 8 to control the on and off of the air circuit, and the tail end of the air inlet pipe 7 is connected to the spiral auger through the rotary joint 7 and is connected to the air circuit;

[0046] High-pressure gas is introduced into the spiral auger side, i.e., the inner side of the bean dregs, through the air inlet pipe 7, and the residual oil between the bean dregs is driven by the pressure difference and the flow of gas, thereby accelerating the separation efficiency of the oil and improving the extraction effect of the residual oil, thereby improving the overall oil yield.

[0047] Among them, the guide plate 15 includes an oil collecting frame 151, an oil guide nozzle 152 and a filter plate 153. The oil collecting frame 151 is a frame structure arranged on the lower side of the oil pressing cylinder 4, and an oil guide nozzle 152 for oil discharge is arranged on one side. A filter plate 153 with holes at the bottom is fixedly connected to the oil guide nozzle 152, and the scum formed after the black soybean oil is squeezed is coarsely filtered through the filter plate 153.

[0048] A method for extracting black soybean oil using the above-mentioned extractor comprises the following steps:

[0049] S1: After sieving the black bean raw material and removing dust, the raw material is introduced into a preheated dryer to evaporate excess water in the black bean. After drying, the raw material is introduced into a frying machine, and is turned over and fried at high temperature for uniform heating;

[0050] S2: After the extractor is preheated, the roasted black beans are added through the top hopper 3 while they are still hot, and the oil pressing cylinder 4 is started to extract the black beans. The negative pressure mechanism on the outside and the active pressure mechanism on one end are simultaneously started to use the pressure difference between the inside and outside to drive the oil between the bean dregs to flow and precipitate, and the oil is finally discharged and collected through the bottom guide plate 15;

[0051] S3: The black soybean oil after primary pressing is introduced into a filter to filter out impurities from the residue machine;

[0052] S4: The filtered black soybean oil is introduced into a cooling cylinder to cool the temperature.

Claims

1. A black soybean oil extractor, characterized in that: include: A mounting frame (1), a protective cylinder (2) is fixed on the mounting frame (1), a spirally squeezed oil pressing cylinder (4) is fixed inside the protective cylinder (2), a hopper (3) is provided at one end of the protective cylinder (2) and is connected to the inner space of the inner oil pressing cylinder (4) for supplying oil, and the oil pressing cylinder (4) is driven by a driving wheel (5) on one side and a driving motor (6) through transmission connection; A negative pressure mechanism, the outer side of the oil pressing cylinder (4) is fixedly provided with a negative pressure mechanism consisting of a negative pressure cylinder (10), so as to form a negative pressure environment on the outer side of the oil pressing cylinder (4) to actively extract the oil; A guide plate (15) is provided on the mounting frame (1) at the lower side of the negative pressure mechanism to collect oil; A slag frame (16), a slag frame (16) is provided at the tail end of the oil pressing cylinder (4) to collect waste slag; The spiral auger in the oil pressing cylinder (4) is a hollow structure, one end of which is connected to the active pressurizing mechanism. The circumference of the spiral auger is provided with an air groove which is connected to the space in the oil pressing cylinder (4). The active pressurizing mechanism comprises an air inlet pipe (8), a first electric control valve (9) and a rotary joint (7). The air inlet pipe (8) is connected to an external high-pressure air circuit. The first electric control valve (9) is connected in series to the air inlet pipe (8) to control the on-off of the air circuit. The tail end of the air inlet pipe (8) is connected to the spiral auger through the rotary joint (7) and is connected to the air circuit at the same time. The negative pressure mechanism comprises: The negative pressure cylinder (10) is a metal cylinder with a diameter larger than that of the oil pressing cylinder (4), which is sleeved on the outside of the oil pressing cylinder (4) and communicates with the inner space of the oil pressing cylinder (4) through a one-way oil outlet hole provided on the circumference of the oil pressing cylinder (4), so as to form a structure of an outer negative pressure chamber; A piston ring (12) is slidably arranged between the negative pressure cylinder (10) and the oil pressing cylinder (4). The piston ring (12) is driven by the extension and retraction of a hydraulic rod (11) fixed to the end surface of the negative pressure cylinder (10), so as to divide the space inside the negative pressure cylinder (10). The movement of the piston ring (12) drives the volume of the chamber to change and the air pressure to change. One-way valves (13) are provided at both ends of the separated negative pressure cylinder (10) from the negative pressure cylinder (10) to the outside, and are used to limit the air intake from the outside to ensure the stability of the negative pressure ring.

2. A black soybean oil extractor according to claim 1, characterized in that: The structural length of the piston ring (12) along the axial direction of the oil pressing cylinder (4) is greater than the axial length of the oil outlet hole of the oil pressing cylinder (4).

3. A black soybean oil extractor according to claim 1, characterized in that: A mounting connecting rod (41) is arranged across the center of the oil outlet hole of the oil pressing cylinder (4), a membrane flap (42) is fixed on the mounting connecting rod (41) via a fixing pin (43), and the membrane flap (42) is limited by a protruding structure on the outer edge of the oil outlet hole to open in one direction from the inside to the outside.

4. A black soybean oil extractor according to claim 1, characterized in that: The oil outlet hole located on the upper half of the oil pressing cylinder (4) is connected to the lower half through an arc-shaped groove on the peripheral surface of the oil pressing cylinder (4).

5. A black soybean oil extractor according to claim 1, characterized in that: The space inside the negative pressure cylinder (10) is divided into a negative pressure chamber (101) and a flow guide chamber (102). The negative pressure chamber (101) is a cylindrical space formed with the oil pressing cylinder (4). Axially protruding fan-shaped flow guide chambers (102) are provided at both ends of the negative pressure chamber (101). The one-way valve (13) is connected to the flow guide chamber (102).

6. A black soybean oil extractor according to claim 1, characterized in that: A set of second electrically controlled valves (14) communicating with the inside of the negative pressure cylinder (10) is arranged at the position of the one-way valve (13) at the bottom side of the negative pressure cylinder (10).

7. A black soybean oil extractor according to claim 1, characterized in that: The guide plate (15) comprises: An oil collecting frame (151), which is a frame structure arranged at the lower side of the oil pressing cylinder (4) and is used to collect the oil falling after pressing; An oil guide nozzle (152), an oil guide nozzle (152) for discharging oil is provided on one side of the oil collecting frame (151) to guide the oil; A filter plate (153) with holes at the bottom is inserted and fixed at the position of the oil guide nozzle (152) to perform coarse filtering of floating foam in the oil.

8. A method for extracting black soybean oil, characterized in that: A black soybean oil extractor according to any one of claims 1 to 7, comprising the following steps: S1: After sieving the black bean raw material and removing dust, the raw material is introduced into a preheated dryer to evaporate excess water in the black bean. After drying, the raw material is introduced into a frying machine, and is turned over and fried at high temperature for uniform heating; S2: After the extractor is preheated, the roasted black beans are added through the top hopper (3) while they are still hot, and the oil pressing cylinder (4) is started to extract the black beans. The negative pressure mechanism on the outside and the active pressure mechanism on one end are simultaneously started, and the oil between the bean dregs is driven to flow and precipitate by the pressure difference between the inside and outside. The oil is finally discharged through the bottom guide plate (15) and then collected; S3: The black soybean oil after primary pressing is introduced into a filter to filter out impurities from the residue machine; S4: The filtered black soybean oil is introduced into a cooling cylinder to cool the temperature.

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