A low temperature pressing process and device suitable for corn oil processing

Abstract

The invention discloses a low-temperature pressing process and a device suitable for corn oil processing, which belongs to the technical field of corn oil production, and comprises the following steps: raw material screening: selecting high-quality corn, cleaning and removing impurities, and then crushing the corn to separate corn germs from corn kernels, screening the corn germs by using a vibrating screen, removing impurities in the germs, and purifying the raw materials; low-temperature pressing: sending the corn germs after billet rolling into a low-temperature pressing device for pressing operation, and the low-temperature pressing temperature is 40°C-80°C; cake and dregs processing: the pre-pressed cakes after low-temperature pressing are sent to a leaching process, and the oil in the pre-pressed cakes is extracted by using an organic solvent, and the oil remaining in the cake and dregs is further recovered. The invention has the technical effects of being able to perform secondary pressing on material residues, without the need for additional secondary pressing equipment, and convenient automatic material discharge, and fully enhancing the oil output effect, further enhancing the oil output rate, ensuring production continuity, and improving work efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of corn oil production, and in particular relates to a low-temperature pressing process and a device thereof suitable for corn oil processing. Background Art

[0002] Corn oil, also known as corn germ oil, is an oil extracted from corn germ. The unsaturated fatty acid content in corn oil is as high as 83-85%. It has the effects of lowering blood cholesterol and triglycerides, reducing blood viscosity, improving blood microcirculation, improving human cell activity, enhancing memory and thinking ability, and enhancing human immunity. With the improvement of people's living standards and the enhancement of health awareness, the demand for high-quality, nutritious and safe corn oil has become more urgent. The low-temperature pressing process can retain the nutritional components and flavor quality of corn oil to the greatest extent, while reducing the generation of harmful substances, which is in line with the development trend and requirements of the modern oil processing industry for the production of high-quality edible oil.

[0003] However, during the low-temperature pressing process, the slag is generally discharged directly through the slag outlet, and the oil remaining in the slag is relatively wasted. In the prior art, a secondary pressing device is generally provided to send the slag into the secondary pressing process for pressing. This method not only consumes energy, but also affects the continuity of the pressing work, thereby affecting the efficiency of the oil pressing. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention provides a low-temperature pressing process and device suitable for corn oil processing, which can perform secondary pressing on the residue without the need for additional secondary pressing equipment, and is convenient for automatic discharge. The oil output effect is sufficient to further enhance the oil output rate, ensure production continuity, and improve work efficiency. It solves the problem in the prior art that a secondary pressing device is additionally set up to send the residue into the secondary pressing process for pressing. This method not only consumes energy, but also affects the continuity of the pressing work, thereby affecting the work efficiency of pressing oil.

[0005] The present invention is achieved by a low temperature pressing process for corn oil processing, comprising the following steps: S1. Raw material screening: Select high-quality corn, clean and remove impurities, then crush the corn to separate the corn germ from the corn kernels, and use a vibrating screen to screen the corn germ to remove impurities in the germ and purify the raw materials; S2. Magnetic separation and purification: After being screened by the vibrating screen, the corn germ enters the permanent magnetic drum, which uses a strong magnetic field adsorption effect to accurately remove the magnetic metal impurities mixed in the corn germ; S3. Crushing: using a toothed roller crusher to crush the corn germ, breaking the larger germ particles into small and uniform particles; S4, softening and tempering: The crushed corn germ enters the softening boiler, the temperature is set at 60-80℃, the moisture content of the corn germ is controlled at 12%-18%, and the corn germ is softened; S5, rolling and forming: the softened corn germ is rolled into a thin sheet of billet by a rolling mill; S6. Low temperature pressing: sending the corn germ after flaking into a low temperature pressing device for pressing at a temperature of 40°C-80°C; S7. Cake and meal processing: The pre-pressed cake after low-temperature pressing is sent to the leaching process, and the oil in the pre-pressed cake is extracted using an organic solvent to further recover the oil remaining in the cake and meal.

[0006] As a preferred embodiment of the present invention, in S6, the corn germ is first placed in a low-temperature pressing device, and is pushed to the right by a spiral pressing method for a first pressing. After the initial pressing, the corn oil is discharged, and then the device is reversed and pushed to the left to perform a second hammering and pressing of the residue by a ramming method. Finally, the corn oil from the second pressing is automatically discharged.

[0007] Through this setting, the nutrients in corn oil are effectively retained, the low temperature environment reduces chemical reactions, so that the corn oil maintains a good flavor, and reduces the production of harmful substances such as trans fatty acids, which helps to extract oil more fully and improve the oil yield. Magnetic separation and purification removes metal impurities to prevent equipment damage. The screening and impurity removal links ensure stable operation of the equipment. The low-temperature pressing device can perform secondary pressing on the residue without the need for additional secondary pressing equipment, and it is convenient for automatic discharge. The full oil output effect further enhances the oil yield, ensures production continuity, and improves work efficiency. The cake meal can be fully processed and used as animal feed, which is conducive to the recycling of resources.

[0008] The top of the support frame is provided with a toothed structure, and the toothed structure is constructed so that the toothed structure can be easily moved and the control wheel can be easily moved.

[0009] With this arrangement, the vertical rotating rod drives the pressing screw to rotate through the transverse rotating rod, and the pressing screw pushes the extruded material to the right to squeeze the oil and discharge it into the oil discharge box. When the initial slag needs to be discharged, the vertical rotating rod drives the transverse rotating rod and the pressing screw to reverse and push the slag to the left to discharge it into the discharge pipe. At the same time, through the cooperation of the transverse rotating rod, the tamping hammer mechanism and the material receiving mechanism, the pressing tamping hammer hammers the slag on the slag box up and down to perform an automatic secondary pressing operation. When the secondary slag needs to be discharged, the material receiving structure and the adjusting part cooperate to drive the slag box to rotate, and drive the discharge barrel to correspond to the discharge pipe, so that the final slag is fully discharged, which ensures the continuity of work, effectively improves the oil output efficiency and improves work efficiency.

[0010] As a preferred embodiment of the present invention, the vertical rotating rod is connected to the pressing cylinder and the support plate through a bearing, and the vertical rotating rod is sequentially sleeved and fixed with a slave gear, a worm and a spherical gear plate from top to bottom, the top of the pressing cylinder is fixedly connected to a motor, the output end of the motor is fixedly connected to a main gear, the main gear and the slave gear are meshingly connected, the worm wheel and the half-tooth rotating ring are sleeved and fixed on the horizontal rotating rod, and the worm and the worm wheel are meshingly connected.

[0011] With this arrangement, the motor drives the vertical rotating rod to rotate, which in turn drives the horizontal rotating rod to rotate through the worm and worm gear, thereby driving the pressing screw to rotate, thereby achieving the extrusion and squeezing operation of the material. When the pressing screw is reversed, the reverse movement of the material residue can be facilitated for discharge, which is easy to use.

[0012] As a preferred embodiment of the present invention, the lifting frame slides through the pressing cylinder, a telescopic spring is fixedly connected between the lifting frame and the top of the pressing cylinder, the semi-toothed swivel is slidably connected to the inner side of the lifting frame, a rack segment is fixedly connected to the inner wall of one side of the lifting frame, the rack segment and the tooth portion of the semi-toothed swivel are meshingly connected, a support rod is fixedly connected to the inner side of the lifting frame, the pressing ram is fixedly connected to the support rod, and a ring plate is fixedly connected to the bottom of the lifting frame.

[0013] With this arrangement, when the pressing screw rod is performing the pressing work, it pushes the extruded material to the right for pressing. At this time, the half-toothed swivel rotates on the lifting frame above the rack segment, and the pressing hammer remains stationary. At this time, the vertical rotating rod drives the slag box to rotate through the adjusting piece. After the initial pressing is completed, when the pressing screw rod performs the discharging work, the vertical rotating rod drives the pressing screw rod to reverse through the horizontal rotating rod, and pushes the slag to the left into the discharge pipe. At this time, through the adjusting piece, the slag box rotates to the corresponding position of the filter plate and the discharge pipe and remains stationary. At this time, the half-toothed swivel reverses, so that its tooth portion engages with the tooth segment to drive the lifting frame to lift upward. When the tooth portion disengages from the tooth segment, it automatically resets downward along the swivel portion of the half-toothed swivel under the action of the telescopic spring, and then drives the pressing hammer to move up and down, and performs a secondary hammering and squeezing on the discharge barrel and the filter plate.

[0014] As a preferred embodiment of the present invention, the bottom of the ring plate is connected to a rotating plate via a bearing, both ends of the bottom of the rotating plate are fixedly connected to rubber positioning columns, the top of the rotating plate is fixedly connected to evenly distributed scraping strips, and the scraping strips and the rotating plate both slide along the inner wall of the discharge pipe.

[0015] Through this arrangement, the movement of the lifting frame can be stably guided by the scraping bar and the rotating plate, thereby ensuring the stability of the pressing hammer during movement. The arrangement of the rotating plate makes it convenient for the scraping bar to cooperate with the discharge barrel during the secondary discharge of material slag. The discharge barrel drives the scraping bar to rotate to a certain extent, thereby facilitating the scraping of material slag attached to the inner wall of the discharge pipe, thereby facilitating quick discharge and improving work efficiency.

[0016] As a preferred embodiment of the present invention, an oil receiving chamber is provided inside the slag box, the filter hole plate is fixedly connected to the top of the slag box, the filter hole plate is communicated with the oil receiving chamber, the discharge barrel is connected to the slag box through a bearing, the bottom of the discharge pipe is slidably connected to the top of the slag box, the bottom of the slag box is connected to the support plate through a bearing, an outer guide ring and an inner guide ring are fixedly connected to the slag box, and the filter hole plate, the slag box and the discharge pipe are all located between the outer guide ring and the inner guide ring.

[0017] With this arrangement, the oil from the secondary pressing enters the oil receiving chamber through the filter plate, thereby improving the stability of the connection structure between the slag box and the discharge pipe, facilitating the rotation of the slag box, and facilitating the rapid discharge of the secondary slag.

[0018] As a preferred embodiment of the present invention, the adjusting member includes a push block and a dial plate, a rotating hole is provided in the middle of the slag box, the vertical rotating rod is passed through the rotating hole, the push block is fixedly connected to the side wall of the vertical rotating rod, a support seat is fixedly connected to the hole wall of the rotating hole, one end of the dial plate is hinged to the support seat, a stop block is fixedly connected to the support seat corresponding to one side of the dial plate, and a support spring is fixedly connected between the other side of the dial plate and the support seat.

[0019] With this arrangement, when the squeezing work is carried out, the squeezing screw rod squeezes the material to the right. At this time, the vertical rotating rod drives the push block to abut the paddle plate. Due to the blocking effect of the stop block, the push block drives the paddle plate to rotate, and then drives the slag box to rotate synchronously. When the initial slag discharge work is carried out, the squeezing screw rod pushes the slag to the left into the discharge pipe. At this time, the slag box drives the filter hole plate to correspond to the discharge pipe, and then the push block follows the vertical rotating rod to reverse. At this time, the push block abuts the paddle plate to squeeze the support spring, that is, the push block passes over the paddle plate, and the slag box does not rotate. At the same time, the lifting frame drives the squeezing hammer to squeeze the slag for the second time. When the secondary slag discharge is carried out, the same operation is performed. The push block abuts the paddle plate and the stop block again, so that the slag box drives the discharge barrel to rotate to the corresponding position of the discharge pipe and stops, thereby realizing automatic discharge operation.

[0020] As a preferred embodiment of the present invention, evenly distributed limit blocks are fixedly connected to the top inner wall of the discharge barrel, a spherical gear ring is sleeved and fixed to the bottom of the discharge barrel, the spherical gear disk and the spherical gear ring are meshingly connected, and the rubber positioning column is inserted between the limit blocks.

[0021] With this arrangement, when the secondary slag discharge is carried out, the discharge pipe corresponds to the discharge barrel, and the lifting frame, under the action of the telescopic spring and the rubber positioning column, makes the lower end part of the rubber positioning column extend into the discharge barrel, that is, the rubber positioning column is inserted between the limit blocks. At this time, due to the cooperation of the spherical tooth plate and the spherical tooth ring, the vertical rotating rod drives each discharge barrel to rotate on itself, and then drives the rubber positioning column to rotate to a certain extent through the limit block, and then drives the scraping bar and the rotating ring to rotate to a certain extent, and the scraping bar can be driven to rotate to a certain extent by rotating the vertical rotating rod forward and reverse by a certain angle, thereby realizing a full scraping operation on the inner wall of the discharge pipe, and the discharge is fast and sufficient, which effectively improves the work efficiency.

[0022] As a preferred embodiment of the present invention, the top of the pressing cylinder is fixedly connected to a feed hopper, the bottom of the pressing cylinder is fixedly connected to an oil outlet plate, the oil outlet plate is communicated with an oil outlet box, the bottom of the oil outlet box is fixedly connected to a support plate, and the top of the discharge pipe is fixedly connected to the pressing cylinder.

[0023] This arrangement facilitates stable connection of the feed hopper, the discharge pipe and the oil outlet box, and facilitates collection of the first pressed oil through the oil outlet hole plate and the oil outlet box.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows: the nutrients in corn oil are effectively retained, the low temperature environment reduces chemical reactions, so that the corn oil maintains a good flavor, and reduces the production of harmful substances such as trans fatty acids, which helps to more fully extract oil and improve the oil yield. Magnetic separation and purification remove metal impurities to prevent equipment damage, and the screening and impurity removal links ensure stable operation of the equipment. The low-temperature pressing device can perform secondary pressing on the residue without the need for additional secondary pressing equipment, and is convenient for automatic discharge. The oil output effect is sufficient to further enhance the oil yield, ensure production continuity, and improve work efficiency. The cake residue can be fully processed and used as animal feed, which is beneficial to the recycling of resources.

[0025] The vertical rotating rod drives the pressing screw to rotate through the horizontal rotating rod, and the pressing screw pushes the extruded material to the right to squeeze the oil and discharge it into the oil discharge box. When the initial slag needs to be discharged, the vertical rotating rod drives the horizontal rotating rod and the pressing screw to reverse and push the slag to the left to discharge it into the discharge pipe. At the same time, through the cooperation of the horizontal rotating rod, the tamping hammer mechanism and the material receiving mechanism, the pressing tamping hammer hammers the slag on the slag box up and down to perform an automatic secondary pressing operation. When the secondary slag needs to be discharged, the material receiving structure and the adjusting part cooperate to drive the slag box to rotate, and drive the discharge barrel to correspond to the discharge pipe, so that the final slag is fully discharged, ensuring the continuity of work, effectively improving the oil output efficiency and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure provided by an embodiment of the present invention; Figure 2 It is a schematic diagram of the internal structure provided by an embodiment of the present invention; Figure 3 is a schematic diagram of the bottom structure provided by an embodiment of the present invention; Figure 4 is a schematic diagram of a side cross-sectional structure provided by an embodiment of the present invention; Figure 5 The embodiment of the present invention provides Figure 4 An enlarged structural diagram of the middle pressing hammer; Figure 6 The embodiment of the present invention provides Figure 5 The enlarged structural diagram at A in the middle; Figure 7 is a schematic diagram of the top structure of the slag box provided by an embodiment of the present invention; Figure 8 The embodiment of the present invention provides Figure 7 Enlarged structural diagram of the transfer hole; Fig. 9 is a schematic diagram of the lifting frame structure provided by an embodiment of the present invention; Fig.10 The embodiment of the present invention provides Fig. 9 The middle part is an enlarged structural diagram; In the figure: 1. Pressing cylinder; 101. Horizontal rotating rod; 102. Pressing screw rod; 103. Half-tooth rotating ring; 104. Feed hopper; 105. Worm gear; 2. Vertical rotating rod; 201. Worm; 202. Slave gear; 203. Main gear; 204. Motor; 205. Round tooth plate; 206. Push block; 3. Slag box; 301. Oil receiving chamber; 302. Rotating hole; 303. Filter plate; 304. Outer guide ring; 305. Inner guide ring; 4. Discharge cylinder ; 401, limit block; 402, round tooth ring; 5, discharge pipe; 6, lifting frame; 601, telescopic spring; 602, rack segment; 603, support rod; 604, pressing hammer; 605, ring plate; 606, rotating plate; 607, rubber positioning column; 608, scraping strip; 7, support seat; 701, stop block; 702, support spring; 703, dial plate; 8, oil outlet box; 801, oil outlet hole plate; 9, support frame; 901, support plate. DETAILED DESCRIPTION

[0027] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings.

[0028] The structure of the present invention is described in detail below in conjunction with the accompanying drawings.

[0029] refer to Figures 1 to 10 As shown, a low-temperature pressing process for corn oil processing provided by an embodiment of the present invention comprises the following steps: S1. Raw material screening: Select high-quality corn, clean and remove impurities, then crush the corn to separate the corn germ from the corn kernels, and use a vibrating screen to screen the corn germ to remove impurities in the germ and purify the raw materials; S2. Magnetic separation and purification: After being screened by the vibrating screen, the corn germ enters the permanent magnetic drum, which uses a strong magnetic field adsorption effect to accurately remove the magnetic metal impurities mixed in the corn germ; S3. Crushing: using a toothed roller crusher to crush the corn germ, breaking the larger germ particles into small and uniform particles; S4, softening and tempering: The crushed corn germ enters the softening boiler, the temperature is set at 60-80℃, the moisture content of the corn germ is controlled at 12%-18%, and the corn germ is softened; S5, rolling and forming: the softened corn germ is rolled into a thin sheet of billet by a rolling mill; S6. Low temperature pressing: sending the corn germ after flaking into a low temperature pressing device for pressing at a temperature of 40°C-80°C; S7. Cake and meal processing: The pre-pressed cake after low-temperature pressing is sent to the leaching process, and the oil in the pre-pressed cake is extracted using an organic solvent to further recover the oil remaining in the cake and meal.

[0030] Specifically, in S6, the corn germ is first placed in a low-temperature pressing device, and is pushed to the right by a spiral pressing method for a first pressing. After the initial pressing, the corn oil is discharged. Then, the device is reversed and pushed to the left to perform a second hammering and pressing of the residue by a ramming method. Finally, the corn oil from the second pressing is automatically discharged.

[0031] The above scheme effectively retains the nutrients in corn oil, and the low temperature environment reduces chemical reactions, so that the corn oil maintains a good flavor and reduces the production of harmful substances such as trans fatty acids, which helps to more fully extract oil and improve the oil yield. Magnetic separation and purification remove metal impurities to prevent equipment damage. The screening and impurity removal process ensures stable operation of the equipment. The low-temperature pressing device can perform secondary pressing on the residue without the need for additional secondary pressing equipment, and it is convenient for automatic discharge. The oil output effect is sufficient to further enhance the oil yield, ensure production continuity, and improve work efficiency. The cake meal can be fully processed and used as animal feed, which is conducive to the recycling of resources.

[0032] Specifically, the low-temperature pressing device includes a support frame 9, a support plate 901 is fixed between the inner sides of the support frame 9, a pressing cylinder 1 is fixed between the tops of the support frames 9, a traverse rod 101 is connected to the inside of the pressing cylinder 1 through a bearing, a pressing screw rod 102 is sleeved and fixed at one end of the traverse rod 101, a tamping mechanism is installed at the other end of the traverse rod 101, and the tamping mechanism includes a lifting frame 6 and a pressing tamping hammer 604, a discharge pipe 5 and an oil outlet box 8 are respectively provided at the two ends of the bottom of the pressing cylinder 1, and the The squeezing hammer 604 extends into the discharge pipe 5, and a material receiving mechanism is installed on the corresponding support plate 901 below the discharge pipe 5, and the material receiving mechanism includes a slag box 3, and the slag box 3 is installed with staggered filter plates 303 and a discharge cylinder 4. A vertical rotation rod 2 runs through the middle part of the slag box 3, the squeezing cylinder 1 and the support plate 901. The upper part of the vertical rotation rod 2 can drive the horizontal rotation rod 101 to rotate, and the horizontal rotation rod 101 can drive the lifting frame 6 to move up and down. The lower part of the vertical rotation rod 2 drives the slag box 3 to rotate through the adjusting part.

[0033] By adopting the above scheme, the vertical rotating rod 2 drives the pressing screw 102 to rotate through the transverse rotating rod 101, and the pressing screw 102 pushes the extruded material to the right to squeeze the oil and discharge it into the oil outlet box 8. When the initial slag needs to be discharged, the vertical rotating rod 2 drives the transverse rotating rod 101 and the pressing screw 102 to reverse and push the slag to the left to discharge it into the discharge pipe 5. At the same time, through the cooperation of the transverse rotating rod 101, the tamping hammer mechanism and the material receiving mechanism, the pressing tamping hammer 604 hammers the slag on the slag box 3 up and down to perform an automatic secondary pressing operation. When the secondary slag needs to be discharged, the material receiving structure and the adjusting part cooperate to drive the slag box 3 to rotate, and drive the discharge barrel 4 to correspond to the discharge pipe 5, so that the final slag is fully discharged, ensuring the continuity of work, effectively improving the oil output efficiency and improving work efficiency.

[0034] Specifically, the vertical rotating rod 2 is connected to the pressing cylinder 1 and the support plate 901 through a bearing, and the vertical rotating rod 2 is sequentially sleeved and fixed with a slave gear 202, a worm 201 and a spherical gear plate 205 from top to bottom. The top of the pressing cylinder 1 is fixedly connected with a motor 204, and the output end of the motor 204 is fixedly connected with a main gear 203, and the main gear 203 and the slave gear 202 are meshingly connected. The worm wheel 105 and the half-tooth rotating ring 103 are sleeved and fixed on the horizontal rotating rod 101, and the worm 201 and the worm wheel 105 are meshingly connected.

[0035] By adopting the above scheme, the motor 204 drives the vertical rotating rod 2 to rotate, and drives the horizontal rotating rod 101 to rotate through the worm 201 and the worm wheel 105, and then drives the pressing screw rod 102 to rotate, thereby realizing the extrusion and squeezing operation of the material. When the pressing screw rod 102 is reversed, the reverse movement of the material residue can be facilitated, which is easy to use.

[0036] Specifically, the lifting frame 6 slides through the pressing cylinder 1, and a telescopic spring 601 is fixedly connected between the lifting frame 6 and the top of the pressing cylinder 1, the semi-toothed rotating ring 103 is slidably connected to the inner side of the lifting frame 6, and a rack segment 602 is fixedly connected to the inner wall of one side of the lifting frame 6, and the rack segment 602 and the tooth portion of the semi-toothed rotating ring 103 are meshingly connected, a support rod 603 is fixedly connected between the inner sides of the lifting frame 6, the pressing ram 604 is fixedly connected to the support rod 603, and a ring plate 605 is fixedly connected to the bottom of the lifting frame 6.

[0037] With the above scheme, when the squeezing screw rod 102 is squeezing, it pushes the extruded material to the right for squeezing. At this time, the half-toothed swivel ring 103 rotates on the lifting frame 6 above the rack segment 602, and the squeezing hammer 604 remains stationary. At this time, the vertical rotating rod 2 drives the slag box 3 to rotate through the adjusting member. After the initial squeezing is completed, when the squeezing screw rod 102 is discharging, the vertical rotating rod 2 drives the squeezing screw rod 102 to reverse through the horizontal rotating rod 101, and pushes the slag to the left to enter the discharge. Tube 5, at this time, through the adjustment part, the slag box 3 rotates to the corresponding position of the filter plate 303 and the discharge tube 5 and remains motionless. At this time, the half-toothed swivel 103 reverses, so that its tooth portion engages with the tooth segment to drive the lifting frame 6 to lift upward. When the tooth portion disengages from the tooth segment, it automatically resets downward along the swivel portion of the half-toothed swivel 103 under the action of the telescopic spring 601, and then drives the squeezing hammer 604 to move up and down, and the slag on the discharge barrel and the filter plate 303 is hammered and squeezed for the second time.

[0038] Specifically, the bottom of the ring plate 605 is connected to a rotating plate 606 via a bearing, both ends of the bottom of the rotating plate 606 are fixedly connected to rubber positioning columns 607, and the top of the rotating plate 606 is fixedly connected to evenly distributed scraping strips 608, and the scraping strips 608 and the rotating plate 606 both slide along the inner wall of the discharge pipe 5.

[0039] By adopting the above scheme, the movement of the lifting frame 6 can be stably guided by the scraping strip 608 and the rotating plate 606, thereby ensuring the stability of the pressing hammer 604 during movement. The setting of the rotating plate 606 makes it convenient for the scraping strip 608 to cooperate with the discharge barrel 4 during the secondary discharge of material residue. The discharge barrel 4 drives the scraping strip to rotate to a certain extent, thereby facilitating the scraping of material residue attached to the inner wall of the discharge pipe 5, thereby facilitating quick discharge and improving work efficiency.

[0040] Specifically, the interior of the slag box 3 is provided with an oil receiving chamber 301, the filter hole plate 303 is fixedly connected to the top of the slag box 3, the filter hole plate 303 is communicated with the oil receiving chamber 301, the discharge barrel 4 is connected to the slag box 3 through a bearing, the bottom of the discharge pipe 5 is slidably connected to the top of the slag box 3, the bottom of the slag box 3 is connected to the support plate 901 through a bearing, the slag box 3 is fixedly connected with an outer guide ring 304 and an inner guide ring 305, the filter hole plate 303, the slag box 3 and the discharge pipe 5 are all located between the outer guide ring 304 and the inner guide ring 305.

[0041] By adopting the above scheme, the secondary pressed oil enters the oil receiving chamber 301 through the filter plate 303, which improves the stability of the connection structure between the slag box 3 and the discharge pipe 5, facilitates the rotation of the slag box 3, and is conducive to the rapid discharge of the secondary slag.

[0042] Specifically, the adjusting member includes a push block 206 and a dial plate 703, a rotating hole 302 is provided in the middle of the slag box 3, the vertical rotating rod 2 is inserted into the rotating hole 302, the push block 206 is fixedly connected to the side wall of the vertical rotating rod 2, a support seat 7 is fixedly connected to the hole wall of the rotating hole 302, one end of the dial plate 703 is hinged to the support seat 7, a stop block 701 is fixedly connected to the support seat 7 corresponding to one side of the dial plate 703, and a support spring 702 is fixedly connected between the other side of the dial plate 703 and the support seat 7.

[0043] With the above scheme, when the squeezing work is carried out, the squeezing screw 102 squeezes the material to the right, and at this time the vertical rotating rod 2 drives the push block 206 to abut against the dial plate 703. Due to the blocking effect of the stop block 701, the push block 206 drives the dial plate 703 to rotate, and then drives the slag box 3 to rotate synchronously. When the initial slag discharge work is carried out, the squeezing screw 102 pushes the slag to the left to enter the discharge pipe 5. At this time, the slag box 3 drives the filter plate 303 to correspond to the discharge pipe 5, and then the push block 206 drives the dial plate 703 to rotate. 06 follows the vertical rotating rod 2 to reverse, at this time, the push block 206 pushes against the dial plate 703 to squeeze the support spring 702, that is, the push block 206 passes over the dial plate 703, and the slag box 3 does not rotate. At the same time, the lifting frame 6 drives the squeezing hammer 604 to perform secondary squeezing on the slag. When the secondary slag is discharged, the same operation is performed. The push block 206 pushes against the dial plate 703 and the stop block 701 again, so that the slag box 3 drives the discharge barrel 4 to rotate to the corresponding position of the discharge pipe 5 and stop, and the automatic discharge operation can be realized.

[0044] Specifically, evenly distributed limit blocks 401 are fixedly connected to the top inner wall of the discharge barrel 4, a spherical gear ring 402 is sleeved and fixed to the bottom of the discharge barrel 4, the spherical gear disk 205 and the spherical gear ring 402 are meshedly connected, and the rubber positioning column 607 is inserted between the limit blocks 401.

[0045] By adopting the above scheme, when the secondary slag discharge work is carried out, the discharge pipe 5 corresponds to the discharge barrel 4, and the lifting frame 6, under the action of the telescopic spring 601 and the rubber positioning column 607, makes the lower end part of the rubber positioning column 607 extend into the discharge barrel 4, that is, the rubber positioning column 607 is inserted between the limit blocks 401. At this time, due to the cooperation of the spherical tooth plate 205 and the spherical tooth ring 402, the vertical rotating rod 2 drives each discharge barrel 4 to rotate, and then drives the rubber positioning column 607 to rotate to a certain extent through the limit block 401, and then drives the scraping bar 608 and the rotating ring to rotate to a certain extent, and by the vertical rotating rod 2 rotating forward and reverse by a certain angle, the scraping bar 608 can be driven to rotate forward and reverse to a certain extent, thereby realizing a full scraping operation on the inner wall of the discharge pipe 5, and the discharge is fast and sufficient, which effectively improves the work efficiency.

[0046] Specifically, the top of the pressing cylinder 1 is fixedly connected to the feed hopper 104, the bottom of the pressing cylinder 1 is fixedly connected to the oil outlet plate 801, the oil outlet plate 801 is connected to the oil outlet box 8, the bottom of the oil outlet box 8 is fixedly connected to the support plate 901, and the top of the discharge pipe 5 is fixedly connected to the pressing cylinder 1.

[0047] The above solution facilitates the stable connection of the feed hopper 104, the discharge pipe 5 and the oil outlet box 8, and facilitates the collection of the first squeezed oil through the oil outlet hole plate 801 and the oil outlet box 8.

[0048] Working principle of the present invention: When the squeezing work is carried out, the starting motor 204 drives the vertical rotating rod 2 to rotate, and drives the horizontal rotating rod 101 to rotate through the worm 201 and the worm wheel 105, and then drives the squeezing screw rod 102 to rotate. The squeezing screw rod 102 pushes the extruded material to the right to squeeze the oil and discharge it into the oil outlet box 8. At this time, the half-toothed rotating ring 103 rotates on the lifting frame 6 above the rack segment 602, and the squeezing hammer 604 remains stationary. At this time, the vertical rotating rod 2 drives the push block 206 to abut against the dial plate 703. Due to the blocking effect of the stop block 701, the push block 206 drives the dial plate 703 to rotate, and then drives the slag box 3 to rotate synchronously until the initial squeezing is completed.

[0049] When it is necessary to discharge the initial slag, the vertical rotating rod 2 drives the horizontal rotating rod 101 and the pressing screw rod 102 to reverse, and push the slag to the left and discharge it into the discharge pipe 5. At this time, the slag box 3 drives the filter hole plate 303 to correspond to the discharge pipe 5, and then the push block 206 follows the vertical rotating rod 2 to reverse, and the push block 206 pushes the dial plate 703 to squeeze the support spring 702, that is, the push block 206 passes over the dial plate 703, and the slag box 3 does not rotate. At this time, the semi-toothed rotating ring 103 reverses, so that its tooth portion engages with the tooth segment to drive the lifting frame 6 to lift upward. When the tooth portion disengages from the tooth segment, it automatically resets downward along the rotating ring portion of the semi-toothed rotating ring 103 under the action of the telescopic spring 601, and then drives the pressing hammer 604 to move up and down, and the slag on the discharge barrel and the filter hole plate 303 is hammered and squeezed for the second time.

[0050] When it is necessary to discharge the secondary slag, the same operation is performed as above. The push block 206 pushes the dial plate 703 and the stop block 701 again, so that the slag box 3 drives the discharge barrel 4 to rotate to the corresponding position of the discharge pipe 5 and stop, and the automatic discharge operation can be realized. When the discharge barrel 4 and the discharge pipe 5 correspond, the lifting frame 6, under the action of the telescopic spring 601 and the rubber positioning column 607, makes the lower end part of the rubber positioning column 607 extend into the discharge barrel 4, and the discharge barrel 4 rotates by the cooperation of the vertical rotating rod 2, the spherical tooth plate 205 and the spherical tooth ring 402. The discharge barrel 4 drives the scraping strip 608 and the rotating ring to rotate to a certain extent through the rubber positioning column 607 and the limit block 401, and the scraping strip 608 can be driven to rotate to a certain extent by reversing the vertical rotating rod 2 at a certain angle, so as to realize the full scraping operation on the inner wall of the discharge pipe 5, and the discharge is fast and sufficient, which effectively improves the work efficiency.

[0051] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A low temperature pressing process suitable for corn oil processing, characterized in that: The following steps are involved: S1. Raw material screening: Select high-quality corn, clean and remove impurities, then crush the corn to separate the corn germ from the corn kernels, and use a vibrating screen to screen the corn germ to remove impurities in the germ and purify the raw materials; S2. Magnetic separation and purification: After being screened by the vibrating screen, the corn germ enters the permanent magnetic drum, which uses a strong magnetic field adsorption effect to accurately remove the magnetic metal impurities mixed in the corn germ; S3. Crushing: using a toothed roller crusher to crush the corn germ, breaking the larger germ particles into small and uniform particles; S4, softening and tempering: The crushed corn germ enters the softening boiler, the temperature is set at 60-80℃, the moisture content of the corn germ is controlled at 12%-18%, and the corn germ is softened; S5, rolling and forming: the softened corn germ is rolled into a thin sheet of billet by a rolling mill; S6. Low temperature pressing: sending the corn germ after flaking into a low temperature pressing device for pressing at a temperature of 40°C-80°C; S7. Cake and meal processing: The pre-pressed cake after low-temperature pressing is sent to the leaching process, and the oil in the pre-pressed cake is extracted using an organic solvent to further recover the oil remaining in the cake and meal.

2. A low temperature pressing process for corn oil processing as claimed in claim 1, characterized in that: In S6, the corn germ is first placed in a low-temperature pressing device, and is pushed to the right by a spiral pressing method for a first pressing. The corn oil is discharged after the initial pressing. Then the device is reversed and pushed to the left to perform a second hammering and pressing of the residue by a ramming method. Finally, the corn oil from the second pressing is automatically discharged.

3. A low temperature pressing process for corn oil processing as claimed in claim 2, characterized in that: The low-temperature pressing device comprises a support frame (9), a support plate (901) is fixed between the inner sides of the support frame (9), a pressing cylinder (1) is fixed between the tops of the support frame (9), the interior of the pressing cylinder (1) is connected to a transverse rod (101) via a bearing, a pressing screw rod (102) is sleeved and fixed to one end of the transverse rod (101), a ramming mechanism is installed at the other end of the transverse rod (101), the ramming mechanism comprises a lifting frame (6) and a pressing ramming hammer (604), a discharge pipe (5) and an oil discharge box (8) are respectively provided at the two ends of the bottom of the pressing cylinder (1), and the pressing ramming hammer ( 604) extends into the discharge pipe (5), and a material receiving mechanism is installed on the corresponding support plate (901) below the discharge pipe (5), and the material receiving mechanism includes a slag box (3), and the slag box (3) is installed with staggered filter holes (303) and a discharge cylinder (4), and a vertical rotating rod (2) passes through the middle of the slag box (3), the pressing cylinder (1) and the support plate (901), and the upper part of the vertical rotating rod (2) can drive the horizontal rotating rod (101) to rotate, and the horizontal rotating rod (101) can drive the lifting frame (6) to move up and down, and the lower part of the vertical rotating rod (2) drives the slag box (3) to rotate through an adjusting member.

4. A low temperature pressing process for corn oil processing as claimed in claim 3, characterized in that: The vertical rotating rod (2) is connected to the pressing cylinder (1) and the support plate (901) via a bearing; a slave gear (202), a worm (201) and a spherical gear plate (205) are sleeved and fixed to the vertical rotating rod (2) from top to bottom in sequence; a motor (204) is fixedly connected to the top of the pressing cylinder (1); an output end of the motor (204) is fixedly connected to a main gear (203); the main gear (203) and the slave gear (202) are meshingly connected; a worm wheel (105) and a half-tooth rotating ring (103) are sleeved and fixed to the horizontal rotating rod (101); the worm wheel (201) and the worm wheel (105) are meshingly connected.

5. A low temperature pressing process for corn oil processing as claimed in claim 4, characterized in that: The lifting frame (6) slides through the pressing cylinder (1); a telescopic spring (601) is fixedly connected between the lifting frame (6) and the top of the pressing cylinder (1); the semi-toothed rotating ring (103) is slidably connected to the inner side of the lifting frame (6); a rack segment (602) is fixedly connected to the inner wall of one side of the lifting frame (6); the rack segment (602) and the toothed portion of the semi-toothed rotating ring (103) are meshingly connected; a support rod (603) is fixedly connected to the inner side of the lifting frame (6); the pressing ram (604) is fixedly connected to the support rod (603); and a ring plate (605) is fixedly connected to the bottom of the lifting frame (6).

6. A low temperature pressing process for corn oil processing as claimed in claim 5, characterized in that: The bottom of the ring plate (605) is connected to a rotating plate (606) via a bearing, both ends of the bottom of the rotating plate (606) are fixedly connected to rubber positioning columns (607), and the top of the rotating plate (606) is fixedly connected to evenly distributed scraping strips (608), and the scraping strips (608) and the rotating plate (606) both slide along the inner wall of the discharge pipe (5).

7. A low temperature pressing process for corn oil processing as claimed in claim 3, characterized in that: An oil receiving chamber (301) is provided inside the slag box (3); the filter plate (303) is fixedly connected to the top of the slag box (3); the filter plate (303) is in communication with the oil receiving chamber (301); the discharge barrel (4) is connected to the slag box (3) via a bearing; the bottom of the discharge pipe (5) is slidably connected to the top of the slag box (3); the bottom of the slag box (3) is connected to the support plate (901) via a bearing; an outer guide ring (304) and an inner guide ring (305) are fixedly connected to the slag box (3); the filter plate (303), the slag box (3) and the discharge pipe (5) are all located between the outer guide ring (304) and the inner guide ring (305).

8. A low temperature pressing process for corn oil processing as claimed in claim 3, characterized in that: The adjusting member comprises a push block (206) and a dial plate (703); a rotating hole (302) is provided in the middle of the slag box (3); the vertical rotating rod (2) is inserted into the rotating hole (302); the push block (206) is fixedly connected to the side wall of the vertical rotating rod (2); a support seat (7) is fixedly connected to the hole wall of the rotating hole (302); one end of the dial plate (703) is hinged to the support seat (7); a stop block (701) is fixedly connected to the support seat (7) corresponding to one side of the dial plate (703); and a support spring (702) is fixedly connected between the other side of the dial plate (703) and the support seat (7).

9. A low temperature pressing process for corn oil processing as claimed in claim 3, characterized in that: The top of the pressing cylinder (1) is fixedly connected to a feed hopper (104), the bottom of the pressing cylinder (1) is fixedly connected to an oil outlet plate (801), the oil outlet plate (801) is connected to an oil outlet box (8), the bottom of the oil outlet box (8) is fixedly connected to a support plate (901), and the top of the discharge pipe (5) is fixedly connected to the pressing cylinder (1).

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