Oil pressing equipment and technology for low-temperature cold pressing of flax and sesame olive oil

Abstract

The invention relates to the technical field of oil presses, in particular to oil pressing equipment and technology for low-temperature cold pressing of flax, sesame and olive oil. The oil pressing equipment for low-temperature cold pressing of the flax, sesame and olive oil comprises a feeding hopper, a driving unit and a supporting shell and further comprises an oil pressing barrel; the oil pressing barrel is composed of a horizontally-arranged screw barrel and a vertically-arranged pressing barrel, the driving unit and the pressing barrel are both installed at the same end of the screw barrel, and the oil pressing barrel extrudes materials horizontally and linearly through the screw barrel and conducts secondary vertical pressing through the pressing rod, so that the materials obtain more sufficient oil pressing operation; by arranging the oil pressing barrel, the oil pressing screw rod in the oil pressing barrel rotates for squeezing oil pressing, meanwhile, the oil pressing screw rod drives the connecting crank to rotate so that the pressing disc can slide up and down to press materials, and then the oil pressing yield of the materials is increased through repeated oil pressing of the oil pressing barrel.

Description

Technical Field

[0001] This invention relates to the field of oil press technology, specifically to a low-temperature cold-pressing equipment and pressing process for flax, sesame, and olive oil. Background Technology

[0002] The background technology of cold-pressed oil presses encompasses an oil-pressing device used to extract vegetable oil from various plant seeds, nuts, and oilseeds. Compared to traditional hot-pressing methods, cold-pressed oil presses employ a gentler process, using low-temperature and mechanical pressing to help retain more nutrients and natural flavors. This method avoids high-temperature heating and the use of chemical solvents, thus reducing the risk of residual solvents or impurities in the vegetable oil, resulting in purer and more nutritious oil. Furthermore, cold-pressed oil presses are suitable for various oilseeds, such as olives, flaxseeds, peanuts, and sesame seeds, meeting the production needs of different vegetable oils.

[0003] Although cold-press oil presses have advantages in preserving quality and nutrients, due to their low-temperature and mechanical pressing process, existing cold-press oil presses typically use screw or hydraulic pressing methods. This method has a relatively slow pressing speed and a lower oil extraction rate compared to hot-pressing equipment. This is because some oilseeds are difficult to fully release their oil content under low temperature and mechanical pressing, resulting in insufficient pressing and reduced oil production.

[0004] In view of the above, in order to overcome the above technical problems, the present invention designs a low-temperature cold-pressing oil pressing equipment and pressing process for flax, sesame and olive oil, thus solving the above technical problems. Summary of the Invention

[0005] The technical problem to be solved by the present invention is that the existing cold pressing oil pressing equipment does not have a sufficient oil pressing effect, and the extraction method for vegetable oils such as flax, sesame and olive oil is relatively simple, resulting in a low oil extraction rate.

[0006] To address the above problems, the present invention provides the following technical solution:

[0007] This invention provides a low-temperature cold-pressed oil pressing device for flax, sesame, and olive oil, comprising a feeding hopper, a drive unit, and a supporting shell. The supporting shell provides support for the drive unit and the feeding hopper. It also includes an oil pressing cylinder, which consists of a horizontally placed screw cylinder and a vertically placed pressing cylinder. The drive unit and the pressing cylinder are both installed at the same end of the screw cylinder. The oil pressing cylinder achieves more thorough oil extraction by horizontally and linearly pressing the material through the screw cylinder and by secondary vertical pressing through the pressing cylinder.

[0008] Based on the above, the feed hopper is installed on the upper side of the oil pressing cylinder by bolts or screws. The drive unit is used to provide power input to the oil pressing cylinder. The drive unit is installed on the support shell and the drive unit is located at the junction of the screw barrel and the pressing cylinder. This ensures that both the pressing cylinder and the screw barrel can obtain sufficient driving force, and also ensures that the pressing cylinder and the screw barrel work together to press the material, thereby improving pressing efficiency and oil production.

[0009] The oil press drum includes a screw drum and a pressing drum. An oil pressing screw is rotatably installed inside the screw drum, and an oil filter groove is opened on the screw drum. The screw drum and the pressing drum are installed perpendicular to each other, and the tail end outlet of the screw drum is connected to the upper opening of the pressing drum. A pressing disc is slidably installed inside the pressing drum. The pressing disc is connected to one end of the oil pressing screw through a connecting crank. The drive unit drives the oil pressing screw to rotate to squeeze and press the oil. At the same time, the oil pressing screw drives the connecting crank to rotate, causing the pressing disc to slide up and down to press the material. Thus, the oil press drum increases the oil yield by repeatedly pressing the material.

[0010] Based on the above analysis, an oil pressing screw is rotatably installed inside the screw barrel. The oil pressing screw is horizontally installed on the support shell, and the pressing cylinder is vertically installed on the support shell. The upper opening of the pressing cylinder is connected to the discharge port of the oil pressing cylinder. The oil pressing screw inside the oil pressing cylinder squeezes and presses the material under the spiral extrusion friction of the drive unit. The virgin oil produced by the pressing screw will be discharged through the oil filter groove at the bottom of the screw barrel.

[0011] The oil pressing screw is eccentrically installed in the cavity of the screw barrel, dividing the screw barrel into a pressing gap and a material discharge gap. The material discharge gap is located below the feed hopper, and the oil filter groove is opened on the inner wall of the screw barrel and located below the pressing gap. The oil pressing screw performs saturated pressing on the material in the pressing gap through eccentric installation, while the pressed oil flows into the oil filter groove under the action of gravity, thereby increasing the pressing stroke of the oil pressing barrel on the material.

[0012] Furthermore, the oil pressing screw and the screw barrel are eccentrically installed. Driven by the drive unit, the oil pressing screw squeezes the material within the eccentric cavity inside the screw barrel. The side of the oil pressing screw eccentrically installed close to the inner wall of the oil pressing barrel is the squeezing gap, where the material is squeezed and pressed for oil. Correspondingly, the cavity on the side of the oil pressing screw eccentrically installed away from the inner wall of the oil pressing barrel is the material discharge gap, used to accommodate the material falling from the feed hopper. The squeezing gap needs to consider both sufficient squeezing and pressing of the material and the location of the oil discharge. The pressing zones are matched, so the extrusion gap is set at a position 90° above the bottom of the screw barrel. This allows the material to be fully extruded, obtaining maximum pressure on the side of the screw barrel. The extracted oil flows down the inner wall of the screw barrel, and the oil filter is set below the extrusion gap. At the same time, to prevent insufficiently pressed oil from entering the oil filter prematurely, the oil filter is set between the extrusion gap and the bottom of the oil press barrel. This ensures that the oil extracted by the material through the extrusion gap flows fully into the oil filter, thereby achieving oil collection.

[0013] The surface of the oil filter tank is equipped with an oil filter screen, and an oil filter channel is opened in the oil filter tank. The oil filter channel is linearly distributed along the axial direction of the screw barrel, and the width of the oil filter channel at the front end is smaller than the width of the oil filter channel at the rear end. The oil filter channel fully presses the material through the narrower area, and then allows the oil press barrel to discharge sufficient oil through the wider oil filter channel.

[0014] Meanwhile, considering that the degree of material compression by the screw press gradually increases with the length of the screw barrel after the material enters the barrel, the material is not fully compressed when it first enters the barrel. Therefore, the width of the oil filter channel near the feed hopper is smaller than the width of the oil filter channel near the pressing barrel. Consequently, the oil filtration speed of the material passing through the front end of the screw barrel is relatively small, thus ensuring that the oil can be fully pressed. Moreover, the fully pressed oil is filtered out quickly and in large quantities through the wider oil filter channel, improving the oil pressing quality and efficiency of the screw press.

[0015] The oil pressing screw is equipped with a pressing thread. The upper end of the pressing thread has a pressing fillet for pressing the material. The cross-section of the pressing thread is an arc shape with the middle concave inward. The bottom end of the pressing thread has a connecting fillet for increasing the strength of the pressing screw. The radius of the connecting fillet is greater than the radius of the pressing fillet. The pressing thread, through the arc shape with the middle concave inward, allows the material to be filled into the oil pressing cylinder more saturatedly.

[0016] It is worth noting that the extrusion thread on the oil press screw, used for pressing and conveying materials, is the main part for pressing oil. The strength and load-bearing capacity of the extrusion thread are also key factors in oil pressing efficiency. In order to make the materials more saturated and smooth in the oil press cylinder, the cross-section of the extrusion thread is a concave arc shape in the middle, so that the space for material to be contained is fuller. The bottom end of the extrusion thread has a connecting fillet to strengthen the connection rigidity, and the top end of the extrusion thread has an extrusion fillet. This allows the material to smoothly enter the extrusion gap from the concave part of the extrusion thread. The radius of the connecting fillet is larger than the radius of the extrusion fillet. The extrusion thread, through the concave arc in the middle, makes the material more saturated and filled into the oil press cylinder.

[0017] One end of the oil pressing screw is equipped with a discharge drum, which is a tapered frustum shape. The end of the discharge drum is a discharge cylinder. A feeding thread is installed on the discharge drum, which is spirally distributed along the tapered shape of the discharge drum. The discharge drum conveys the material after the initial pressing into the discharge cylinder through the feeding thread. The discharge cylinder squeezes the material through the tapered frustum shape of the discharge drum, thereby allowing the oil pressing cylinder to smoothly convey the initial pressed material into the pressing cylinder.

[0018] As described above, the material in the screw barrel undergoes one pressing and is then discharged from the discharge drum with a tapered surface. The discharge drum is a tapered frustum shape, which smoothly transports the material after primary pressing. At this time, the discharge drum squeezes the material through the tapered frustum shape of the discharge drum, thereby causing the oil press to discharge the primary pressed material in a cylindrical shape.

[0019] The end of the screw barrel is equipped with a material cutter. The material cutter is fan-shaped and there are two material cutters. As the material cutter rotates synchronously with the pressing screw, the two fan-shaped material cutters alternately cut and drop the material discharged from the discharge cylinder, thereby making the material of the secondary pressing of the oil press barrel more loose and easier to extract oil.

[0020] Furthermore, the material cutter is fan-shaped and needs to rotate and cut above the pressing cylinder. Therefore, the cutting angle of the material cutter needs to be spirally tilted like the blades of a fan to obtain a more accurate cutting angle and a more reasonable material drop space. The material roll cut by the material cutter will move along the spiral blade surface of the material cutter and then be conveyed to the top of the pressing cylinder and fall into the pressing cylinder, thus making the linkage between the internal mechanisms of the oil pressing cylinder more stable and reliable.

[0021] A pressing disc is hinged below the connecting crank. The pressing disc is slidably installed inside the pressing cylinder in an arc shape, and a material discharge groove is opened at the inferior arc notch on one side of the pressing disc. The upper part of the pressing disc is an inclined surface that slopes towards the material discharge groove. The pressing disc allows the material to fall into the material discharge groove through the upper inclined surface, thereby ensuring that the material in the pressing cylinder falls accurately into the pressing area.

[0022] It is worth noting that the pressing cylinder is driven by the reciprocating rotation of the connecting crank to press the pressing disc up and down to press the material. The material cut by the crushing blade falls on the top of the pressing disc, leaving material residue on the pressing disc and affecting the oil yield. Therefore, the upper end of the pressing disc is set as an inclined surface towards the material drop chute. The pressing disc uses the upper inclined surface to allow the material to fall into the material drop chute, thus ensuring that the material in the pressing cylinder falls accurately into the pressing area.

[0023] A guide block is installed below the material discharge chute. The guide block is wedge-shaped. The material is discharged through the upper wedge-shaped inclined surface of the guide block. The lower end of the guide block is in close contact with the pressing disc, so that the pressing cylinder can perform material discharge and pressing operations in a reasonable manner.

[0024] The guide block is wedge-shaped and installed on the inner wall of the pressing cylinder. It is located below the discharge chute. When the pressing disc is lifted upward after pressing, it will fit against the guide block, thus closing the discharge chute. The material cannot fall into the area below the pressing disc through the discharge chute. When the pressing disc reaches a high position, the guide block separates from the pressing disc, and the material falls into the pressing area through the wedge-shaped inclined surface of the guide block. This allows the pressing cylinder to perform the discharge and pressing operations in a reasonable manner.

[0025] This invention also provides a low-temperature cold-pressing process for flaxseed olive oil, comprising the following steps:

[0026] S1: Pour the washed olives into the feed hopper. The olives are pressed once in the screw barrel to obtain extra virgin olive oil and olive pulp. The extra virgin olive oil flows through the filter tank and filter channel, and is then discharged from the bottom of the screw barrel.

[0027] S2: The olive pulp continues to be pressed forward by the oil press screw to extract oil. The degree of compression between the olive pulp and the oil press screw is the greatest when the olive pulp passes through the compression gap. As the oil filter tank gets larger and larger, the extra virgin olive oil produced by the olive pulp is discharged from the screw barrel through the oil filter tank.

[0028] S3: Olive paste is stirred and extruded by the screw drum and enters the discharge drum. Under the extrusion of the tapered discharge drum, the olive paste forms olive rolls through the discharge drum. The olive rolls are then crushed into olive scraps by the rotation of the scrap cutter on the side of the discharge drum.

[0029] S4: Olive scraps fall into the press cylinder. Under the pressure of the pressing discs inside the press cylinder, the olive scraps undergo secondary pressing to produce secondary olive oil and olive pomace. The olive pomace is discharged from the bottom of the press cylinder, and the secondary olive oil is collected through the side of the press cylinder.

[0030] The beneficial effects of this invention are as follows:

[0031] 1. This invention features an oil pressing cylinder with a rotating screw inside to press and extract oil. Simultaneously, the screw drives a connecting crank to rotate, causing the pressing disc to slide up and down to press the material. Through the combination of screw pressing and downward pressing, the material is pressed more thoroughly, thus increasing the oil extraction rate.

[0032] 2. This invention, by eccentrically installing the oil pressing screw and the oil pressing cylinder, enables the oil pressing screw to fully and meticulously stir the material inside the oil pressing cylinder. The eccentric installation of the oil pressing screw saturates the material in the extrusion gap, while the pressed oil flows into the oil filter tank under the action of gravity, thereby improving the oil pressing efficiency and oil yield of the oil pressing screw.

[0033] 3. The present invention also includes a pressing cylinder. Through the linkage design between the crank and the oil pressing screw inside the pressing cylinder, the pressing disc inside the pressing cylinder can synchronously press oil with the oil pressing screw, thereby performing secondary pressing on the material. This solves the problem of insufficient oil extraction in single-screw oil pressing and makes cold pressing more complete. Attached Figure Description

[0034] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0035] The above and other aspects of the invention will now be described by way of example only, with reference to the accompanying drawings, in which:

[0036] Figure 1 This is an overall schematic diagram of the invention;

[0037] Figure 2 This is an overall schematic diagram of the oil pressing cylinder of the present invention;

[0038] Figure 3 This is a schematic diagram of the inside of the oil press cylinder of the present invention;

[0039] Figure 4 This is the present invention. Figure 2 Cross-sectional view at point AA;

[0040] Figure 5 This is the present invention. Figure 2 Cross-sectional view at BB;

[0041] Figure 6 This is the present invention. Figure 2 A cross-sectional view at point CC;

[0042] Figure 7 This is the present invention. Figure 6 Enlarged view of point D;

[0043] Figure 8 This is a schematic diagram of material flow according to the present invention;

[0044] Figure 9 This is a process flow diagram of the present invention.

[0045] In the diagram: 1. Feed hopper; 2. Drive unit; 3. Support shell; 4. Oil pressing cylinder; 5. Screw barrel; 51. Oil pressing screw; 511. Extrusion thread; 512. Connecting fillet; 513. Extrusion fillet; 52. Oil filter trough; 521. Oil filter screen; 522. Oil filter channel; 53. Extrusion gap; 54. Material discharge gap; 55. Discharge drum; 56. Feeding thread; 57. Discharge cylinder; 58. Crusher; 6. Pressing cylinder; 61. Connecting crank; 62. Pressing disc; 63. Material discharge chute; 64. Guide block; 65. Wedge-shaped inclined plane; 66. Slag discharge filter screen; 67. Rotating valve disc; 68. Slag discharge sweeping rod; 69. Control motor. Detailed Implementation

[0046] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0047] like Figure 1 and Figure 2 As shown, the present invention provides a low-temperature cold-pressed oil pressing device for flax, sesame, and olive oil, including a feeding hopper 1, a drive unit 2, and a supporting shell 3. The supporting shell 3 provides support for the drive unit 2 and the feeding hopper 1. It also includes an oil pressing cylinder 4, which consists of a horizontally placed screw cylinder 5 and a vertically placed pressing cylinder 6. The drive unit 2 and the pressing cylinder 6 are both installed at the same end of the screw cylinder 5. The oil pressing cylinder 4 fully presses the material by the horizontal linear extrusion of the material by the screw cylinder 5 and the secondary vertical pressing by the pressing cylinder 6.

[0048] During operation, the material enters the oil pressing cylinder 4 through the feed hopper 1. The drive unit 2 simultaneously drives the screw barrel 5 and the pressing cylinder 6 to press the material. The screw barrel 5 uses a screw to squeeze and extract oil; the pressing cylinder 6 uses a reciprocating linear motion pressing disc 62 to press the material. The combination of the two achieves full pressing of the material and increases the oil yield.

[0049] The feed hopper 1 is installed on the upper side of the oil pressing cylinder 4 by screws. The drive unit 2 is used to provide power input to the oil pressing cylinder 4. The drive unit 2 is installed on the support shell 3. The drive unit 2 is installed at the junction of the screw barrel 5 and the pressing cylinder 6, so as to ensure that both the pressing cylinder 6 and the screw barrel 5 can obtain sufficient driving force, and ensure that the pressing cylinder 6 and the screw barrel 5 work together to press the material, thereby improving the pressing efficiency and oil production.

[0050] like Figures 3 to 4 As shown, the oil pressing cylinder 4 includes a screw cylinder 5 and a pressing cylinder 6. An oil pressing screw 51 is rotatably installed inside the screw cylinder 5, and an oil filter groove 52 is opened on the screw cylinder 5. The screw cylinder 5 and the pressing cylinder 6 are installed perpendicular to each other, and the tail end outlet of the screw cylinder 5 is connected to the upper end opening of the pressing cylinder 6. A pressing disc 62 is slidably installed inside the pressing cylinder 6. The pressing disc 62 is connected to one end of the oil pressing screw 51 through a connecting crank 61. The driving unit 2 drives the oil pressing screw 51 to rotate to squeeze and press oil. At the same time, the oil pressing screw 51 drives the connecting crank 61 to rotate, causing the pressing disc 62 to slide up and down to press the material. Thus, the oil pressing cylinder 4 increases the amount of oil extracted from the material through repeated pressing.

[0051] When the oil press cylinder 4 is working, the oil press screw 51 inside the screw barrel 5 will drive the material to be squeezed and rotated inside the screw barrel 5. The oil produced by the material will flow along the inside of the screw barrel 5 and then be discharged and collected through the oil filter tank 52. Furthermore, after the material is pressed once by the oil press screw 51, the material will fall into the press cylinder 6. The connecting crank 61 drives the press disc 62 to perform up and down pressing.

[0052] An oil pressing screw 51 is rotatably installed inside the screw barrel 5. The oil pressing screw 51 is horizontally installed on the supporting shell 3. The pressing cylinder 6 is vertically installed on the supporting shell 3, and the upper opening of the pressing cylinder 6 is connected to the discharge port of the oil pressing cylinder 4. The oil pressing screw 51 inside the oil pressing cylinder 4 squeezes and presses the material for oil under the spiral extrusion friction of the drive unit 2. The virgin oil produced by the pressing of the oil pressing screw 51 is discharged through the oil filter groove 52 at the bottom of the screw barrel 5.

[0053] like Figure 4 As shown, the oil pressing screw 51 is eccentrically installed in the cavity of the screw barrel 5. The oil pressing screw 51 divides the screw barrel 5 into a pressing gap 53 and a material discharge gap 54. The pressing gap 53 is located at a position 90° above the bottom of the oil pressing barrel 4, and the material discharge gap 54 is located below the feed hopper 1. The oil filter groove 52 is opened on the inner wall of the screw barrel 5 and is located below the pressing gap 53. The oil pressing screw 51 performs saturated pressing on the material in the pressing gap 53 through eccentric installation. At the same time, the pressed oil flows into the oil filter groove 52 under the action of gravity, thereby increasing the pressing stroke of the oil pressing barrel 4 on the material.

[0054] The oil pressing screw 51 is eccentrically installed with the screw barrel 5. Driven by the drive unit 2, the oil pressing screw 51 squeezes the material in the eccentric cavity inside the screw barrel 5. The side of the oil pressing screw 51 that is eccentrically installed and close to the inner wall of the oil pressing barrel 4 is the squeezing gap 53, in which the material is squeezed and pressed for oil. Correspondingly, the cavity on the side of the oil pressing screw 51 that is eccentrically installed away from the inner wall of the oil pressing barrel 4 is the material discharge gap 54, which is used to accommodate the material falling from the feed hopper 1. The squeezing gap 53 needs to consider both sufficient squeezing and pressing of the material and oil discharge. The position of the outlet matches the pressing area, so the extrusion gap 53 is set at a position of ° above the bottom of the screw barrel 5, so that the material is fully extruded and obtains the maximum extrusion force on the side of the screw barrel 5. The extracted oil flows down the inner wall of the screw barrel 5. The oil filter trough 52 is opened below the extrusion gap 53. At the same time, in order to prevent the oil that has not been fully pressed from entering the oil filter trough 52 in advance, the oil filter trough 52 is opened between the extrusion gap 53 and the bottom of the oil pressing barrel 4. This ensures that the oil extracted by the material through the extrusion gap 53 flows fully into the oil filter trough 52, thereby realizing the collection of oil.

[0055] like Figure 5 and Figure 6 As shown, an oil filter screen 521 is installed on the surface of the oil filter tank 52, and an oil filter channel 522 is opened in the oil filter tank 52. The oil filter channel 522 is linearly distributed along the axial direction of the screw barrel 5, and the width of the oil filter channel 522 at the front end is smaller than the width of the oil filter channel 522 at the rear end. The oil filter channel 522 fully presses the material through the area with a smaller width, and then the oil press barrel 4 discharges sufficient oil through the oil filter channel 522 with a larger width.

[0056] Considering that the degree of material compression by the screw 51 gradually increases with the length of the screw 5 after the material enters the screw barrel 5, the compression of the material by the screw 51 is not sufficient when the material first enters the screw barrel 5. Therefore, the width of the oil filtering channel 522 near the feed hopper 1 is smaller than the width of the oil filtering channel 522 near the pressing cylinder 6. Consequently, the oil filtration speed of the material passing through the front end of the screw barrel 5 is relatively small, thus ensuring that the oil can be fully pressed. Moreover, the fully pressed oil is filtered out quickly and in large quantities through the wider oil filtering channel 522, which improves the oil pressing quality and efficiency of the screw 51.

[0057] like Figure 6 and Figure 7As shown, the oil pressing screw 51 is equipped with a pressing thread 511. The upper end of the pressing thread 511 is provided with a pressing fillet 513 for pressing the material. The cross-section of the pressing thread 511 is an arc shape with the middle concave inward. The bottom end of the pressing thread 511 is provided with a connecting fillet 512 for increasing the strength of the pressing screw. The radius of the connecting fillet 512 is greater than the radius of the pressing fillet 513. The pressing thread 511, through the arc shape with the middle concave inward, allows the material to be filled into the oil pressing cylinder 4 more saturatedly.

[0058] The extrusion thread 511 on the oil press screw 51, used for extruding and conveying materials, is the main part for oil extraction. The strength and load-bearing capacity of the extrusion thread 511 are also key factors for oil extraction efficiency. In order to make the materials more saturated and smooth in the oil press cylinder 4, the cross-section of the extrusion thread 511 is a concave arc shape in the middle, so that the space for material to be contained is fuller. The bottom end of the extrusion thread 511 is provided with a connecting fillet 512 to enhance the connection rigidity, and the top end of the extrusion thread 511 is provided with an extrusion fillet 513, so that the materials can smoothly enter the extrusion gap 53 from the concave part of the extrusion thread 511. The radius of the connecting fillet 512 is greater than the radius of the extrusion fillet 513. The extrusion thread 511, through the concave arc in the middle, makes the materials more saturated and filled into the oil press cylinder 4.

[0059] like Figure 6 and Figure 8 As shown, a discharge drum 55 is installed at one end of the oil pressing screw 51. The discharge drum 55 is a truncated cone shape with a taper. The end of the discharge drum 55 is a discharge cylinder 57. A feeding thread 56 is installed on the discharge drum 55. The feeding thread 56 is spirally distributed along the taper of the discharge drum 55. The discharge drum 55 conveys the material after the initial pressing into the discharge cylinder 57 through the feeding thread 56. The discharge cylinder 57 squeezes the material through the truncated cone shape of the discharge drum 55, thereby allowing the oil pressing cylinder 4 to smoothly convey the initial pressed material into the pressing cylinder 6.

[0060] The material in the screw barrel 5 is pressed once and then discharged from the discharge drum 55 with a tapered surface. The discharge drum 55 is a truncated cone with a tapered shape, so as to smoothly transport the material after primary pressing. At this time, the discharge cylinder 57 squeezes the material through the tapered truncated cone shape of the discharge drum 55, so that the oil pressing cylinder 4 discharges the primary pressed material in a cylindrical shape.

[0061] like Figure 8As shown, a material cutter 58 is installed at the end of the screw barrel 5. The material cutter 58 is fan-shaped, and there are two material cutters 58. As the two fan-shaped material cutters 58 rotate synchronously with the pressing screw, they alternately cut and drop the material discharged from the discharge cylinder 57, thereby making the material from the secondary pressing of the oil pressing cylinder 4 more loose and easier to extract oil.

[0062] The material cutter 58 is fan-shaped. The material cutter 58 needs to rotate and cut above the pressing cylinder 6. Therefore, the cutting angle of the material cutter 58 needs to be spirally tilted like the fan blades of a fan to obtain a more accurate cutting angle and a more reasonable material drop space. The material roll cut by the material cutter 58 will move along the spiral fan blade surface of the material cutter 58 and then be transported to the top of the pressing cylinder 6 and fall into the pressing cylinder 6, thereby making the linkage between the internal mechanisms of the oil pressing cylinder 4 more stable and reliable.

[0063] like Figure 6 and Figure 8 As shown, a pressing disc 62 is hinged below the connecting crank 61. The pressing disc 62 is arc-shaped and slidably installed inside the pressing cylinder 6. A material discharge groove 63 is provided at the notch of the pressing disc 62. The upper part of the pressing disc 62 is an inclined surface that slopes towards the material discharge groove 63. The pressing disc 62 allows the material to fall into the material discharge groove 63 through the upper inclined surface, thereby ensuring that the material in the pressing cylinder 6 falls accurately into the pressing area.

[0064] The pressing cylinder 6 is driven by the reciprocating rotation of the connecting crank 61, which in turn drives the pressing disc 62 to press the material up and down. The material cut by the crushing cutter 58 falls above the pressing disc 62, causing material residue on the pressing disc 62 and affecting the oil extraction yield. Therefore, the upper end of the pressing disc is set as an inclined surface towards the material drop trough 63. The pressing disc 62 uses the upper inclined surface to allow the material to fall into the material drop trough 63, thereby ensuring that the material in the pressing cylinder 6 falls accurately into the pressing area.

[0065] A guide block 64 is installed below the material discharge chute 63. The guide block 64 is wedge-shaped. The guide block 64 discharges the material through the upper wedge-shaped inclined surface 65. The lower end of the guide block 64 is in close contact with the pressing disc 62, so that the pressing cylinder 6 can perform material discharge and pressing operations in a reasonable manner.

[0066] like Figure 6 and Figure 8As shown, the guide block 64 is wedge-shaped and is installed on the inner wall of the pressing cylinder 6. The guide block 64 is located below the discharge chute 63. When the pressing disc 62 completes the pressing and is lifted upward, it will fit with the guide block 64, thereby closing the discharge chute 63. The material cannot fall into the area below the pressing disc 62 through the discharge chute 63. When the pressing disc 62 reaches a high position, the guide block 64 separates from the pressing disc 62, and the material falls into the pressing area through the wedge-shaped inclined surface 65 of the guide block 64. This allows the pressing cylinder 6 to perform the material discharge and pressing operations in a reasonable manner.

[0067] like Figure 8 As shown, a slag discharge filter screen 66 is fixedly installed at the bottom of the pressing cylinder 6. The slag discharge filter screen 66 has a slit for slag discharge. A rotary valve disc 67 connected to the slag discharge slit is rotatably installed at the lower end of the slag discharge filter screen 66. Both the rotary valve disc 67 and the slag discharge filter screen 66 have corresponding slits. A control motor 69 for driving the rotary valve disc 67 to rotate is installed below the rotary valve disc 67. When the pressing disc 62 completes the pressing and is lifted, the control motor 69 will drive the rotary valve disc 67 to rotate. At the same time, a slag discharge sweeping rod 68 is installed at the upper end of the rotary valve disc 67 and above the slag discharge filter screen 66. The slag discharge sweeping rod 68 will rotate with the rotary valve disc 67, thereby cleaning the waste residue on the slag discharge sweeping rod 68, thus realizing material discharge.

[0068] In the operation of this invention, the worker first washes the olives and starts the drive unit 2. At this time, the oil pressing screw 51 and the connecting crankshaft both start to rotate. The worker then pours the washed olives into the feed hopper 1. The olives fall through the feed hopper 1 into the discharge gap 54 in the screw barrel 5. At this time, the extrusion threads 511 of the oil pressing screw 51 will squeeze and stir the olives. The olives will enter the extrusion gap 53 after passing through the discharge gap 54. After being squeezed by the oil pressing screw 51 in the extrusion gap 53, the olives will first turn into olive paste and produce extra virgin olive oil. The extra virgin olive oil is discharged from the oil filter tank 52. As the oil pressing screw 51 continues to move forward, the extra virgin olive oil produced by the olives becomes more abundant. A large amount of extra virgin olive oil is discharged from the oil filter channel 522 under the larger oil filter tank 52 at the rear of the screw barrel 5 for collection.

[0069] After being pressed by the screw drum 5, the olive fruit is turned into olive pulp. The olive pulp enters the discharge drum 55 along the oil pressing screw 51. Then, under the compression of the tapered plane of the discharge drum 55, the olive pulp is discharged from the discharge cylinder 57 in a cylindrical shape. The cylindrical olive pulp is then cut by the crushing cutter 58 and enters the pressing drum 6. The connecting crank 61 drives the pressing disc 62 to perform secondary pressing on the olive pulp. The secondary olive oil produced is collected at the bottom of the pressing drum 6 and the residue is discharged.

[0070] The description herein is provided to enable those skilled in the art to implement or use the present disclosure. Various modifications to the present disclosure will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other variations without departing from the scope of the disclosure. Therefore, this disclosure is not limited to the examples and designs described herein, but should be given the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A low-temperature cold-pressed oil pressing device for flax, sesame, and olive oil, comprising a feed hopper (1), a drive unit (2), and a supporting shell (3), wherein the supporting shell (3) provides support for the drive unit (2) and the feed hopper (1), characterized in that, It also includes an oil pressing cylinder (4), which is composed of a horizontally placed screw cylinder (5) and a vertically placed pressing cylinder (6). The drive unit (2) and the pressing cylinder (6) are both installed at the same end of the screw cylinder (5). The oil pressing cylinder (4) uses the horizontal linear extrusion of the material by the screw cylinder (5) and the secondary vertical pressing by the pressing cylinder (6) to make the oil pressing equipment fully press the material.

2. The low-temperature cold-pressing oil pressing equipment for flax, sesame, and olive oil according to claim 1, characterized in that: The main body of the oil pressing cylinder (4) is equipped with a screw cylinder (5), and a pressing cylinder (6) is installed at one end of the screw cylinder (5). An oil pressing screw (51) is rotatably installed inside the screw cylinder (5), and an oil filter groove (52) is opened on the screw cylinder (5). The screw cylinder (5) and the pressing cylinder (6) are installed perpendicular to each other, and the tail end outlet of the screw cylinder (5) is connected to the upper end opening of the pressing cylinder (6). A pressing disc (62) is slidably installed inside the pressing cylinder (6). The pressing disc (62) is connected to one end of the oil pressing screw (51) through a connecting crank (61). The oil pressing screw (51) drives the connecting crank (61) to rotate in the horizontal direction, so that the pressing disc (62) slides up and down in the vertical direction to press the material, thereby increasing the amount of oil extracted from the material through repeated pressing in the oil pressing cylinder (4).

3. The low-temperature cold-pressing oil pressing equipment for flax, sesame, and olive oil according to claim 2, characterized in that: The oil pressing screw (51) is eccentrically installed in the cavity of the screw barrel (5). The oil pressing screw (51) divides the screw barrel (5) into a pressing gap (53) and a material discharge gap (54). The material discharge gap (54) is located below the feed hopper (1). The oil filter groove (52) is opened on the inner wall of the screw barrel (5) and located below the pressing gap (53). The oil pressing screw (51) saturates the material in the pressing gap (53) by eccentric installation. At the same time, the pressed oil flows into the oil filter groove (52) under the action of gravity, thereby increasing the pressing stroke of the oil pressing barrel (4) on the material.

4. The low-temperature cold-pressing oil pressing equipment for flax, sesame, and olive oil according to claim 3, characterized in that: The surface of the oil filter tank (52) is equipped with an oil filter screen (521), and an oil filter channel (522) is opened in the oil filter tank (52). The oil filter channel (522) is linearly distributed along the axial direction of the screw barrel (5), and the width of the oil filter channel (522) at the front end is smaller than the width of the oil filter channel (522) at the rear end. The oil filter channel (522) fully presses the material through the area with a smaller width, and then the oil press barrel (4) discharges sufficient oil through the oil filter channel (522) with a larger width.

5. The low-temperature cold-pressing oil pressing equipment for flax, sesame, and olive oil according to claim 2, characterized in that: The oil pressing screw (51) is equipped with a pressing thread (511). The upper end of the pressing thread (511) is provided with a pressing fillet (513) for pressing the material. The cross-section of the pressing thread (511) is an arc shape with the middle concave inward. The bottom end of the pressing thread (511) is provided with a connecting fillet (512) for increasing the strength of the pressing screw. The radius of the connecting fillet (512) is greater than the radius of the pressing fillet (513). The pressing thread (511) allows the material to be filled into the oil pressing cylinder (4) more saturated through the arc shape with the middle concave inward.

6. The low-temperature cold-pressing oil pressing equipment for flax, sesame, and olive oil according to claim 2, characterized in that: One end of the oil pressing screw (51) is equipped with a discharge drum (55), which is a truncated cone shape with a taper. The end of the discharge drum (55) is a discharge cylinder (57). A feeding thread (56) is installed on the discharge drum (55), which is spirally distributed along the taper of the discharge drum (55). The discharge drum (55) conveys the material after the first pressing into the discharge cylinder (57) through the feeding thread (56). The discharge cylinder (57) squeezes the material through the truncated cone shape of the discharge drum (55), thereby enabling the oil pressing cylinder (4) to smoothly convey the first-pressed material into the pressing cylinder (6).

7. The low-temperature cold-pressing oil pressing equipment for flax, sesame, and olive oil according to claim 2, characterized in that: The end of the screw barrel (5) is equipped with a material cutter (58). The material cutter (58) is fan-shaped. As the material cutter (58) rotates synchronously with the pressing screw, the two fan-shaped material cutters (58) alternately cut and drop the material discharged from the discharge cylinder (57), thereby making the material of the secondary pressing in the oil pressing cylinder (4) more loose and easier to extract oil.

8. The low-temperature cold-pressing oil pressing equipment for flax, sesame, and olive oil according to claim 2, characterized in that: A pressing disc (62) is hinged below the connecting crank (61). The pressing disc (62) is arc-shaped and slidably installed inside the pressing cylinder (6). A material discharge groove (63) is provided at the notch of the pressing disc (62). The upper part of the pressing disc (62) is an inclined surface that slopes towards the material discharge groove (63). The pressing disc (62) allows the material to fall into the material discharge groove (63) through the upper inclined surface, thereby ensuring that the material in the pressing cylinder (6) falls accurately into the pressing area.

9. The low-temperature cold-pressing oil pressing equipment for flax, sesame, and olive oil according to claim 7, characterized in that: A guide block (64) is installed below the discharge chute (63). The guide block (64) is wedge-shaped. The guide block (64) discharges the material through the wedge-shaped inclined surface (65) at the upper end. The lower end of the guide block (64) is in close contact with the pressing disc (62), so that the pressing cylinder (6) can perform the discharge and pressing operations in a reasonable manner.

10. A low-temperature cold-pressing process for flaxseed olive oil, characterized in that: The process employs the low-temperature cold-pressed flaxseed olive oil pressing equipment as described in any one of claims 1 to 9, and the low-temperature cold-pressed flaxseed olive oil pressing process includes the following steps: S1: Pour the washed olives into the feed hopper (1). The olives are pressed once in the screw barrel (5) to obtain extra virgin olive oil and olive pulp. The extra virgin olive oil flows through the filter tank (52) and the filter channel (522) and is discharged from the bottom of the screw barrel (5). S2: The olive pulp continues to be pressed forward by the oil pressing screw (51) to extract oil. The olive pulp is pressed to the maximum degree when it passes through the pressing gap (53). As the oil filter tank (52) gets bigger and bigger, the extra virgin olive oil produced by the olive pulp is discharged from the screw barrel (5) through the oil filter tank (52). S3: The olive paste is stirred and extruded by the screw drum (5) and enters the discharge drum (55). Under the extrusion of the tapered discharge drum (55), the olive paste is formed into olive rolls through the discharge cylinder (57). The olive rolls are formed into olive scraps by the rotation of the scrap cutter (58) on the side of the discharge cylinder (57). S4: Olive crushed material falls into the press cylinder (6). Under the pressing action of the pressing disc (62) inside the press cylinder (6), the olive crushed material is pressed a second time to produce secondary olive oil and olive residue. The olive residue is discharged from the bottom of the press cylinder (6), and the secondary olive oil is collected through the side of the press cylinder (6).

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