Novel full-circular-exhaust spiral oil press

Abstract

A novel full-round-row spiral oil press mainly comprises a base, a transmission mechanism, a machine frame, a stock bin and a pressing cage, pressing ring sets are tightly arranged in the pressing cage and are in threaded connection with the machine frame to be locked through adjusting nuts, a barrel is formed in the pressing ring sets, a pressing screw shaft matched with the barrel is further arranged between the transmission mechanism and the machine frame, a pressing screw is arranged on the pressing screw shaft, and the stock bin is arranged on the stock bin. A cake adjusting mechanism is further arranged on the machine frame, an inclined petal-shaped protrusion is arranged in each pressing ring forming the pressing ring set, and the high-point parts of the petal-shaped protrusions form an inclined line after being arranged in the pressing chamber; the included angle between the threaded vertical face of the material pushing side of the pressing screw and the bottom face of the pressing screw is an obtuse angle. A cambered surface is formed at the joint of the threaded vertical surface of the material pushing side on the pressing screw and the bottom surface of the pressing screw; by means of the structure, oil crops are always in a wriggling state in the barrel, the squeezing effect of the squeezing ring is stimulated to the maximum degree, the material conveying smoothness is improved, and the phenomenon that the oil crops are blocked in the barrel is avoided.

Description

Technical Field

[0001] This utility model relates to a screw oil press, and more particularly to a novel all-circular screw oil press. Background Technology

[0002] A screw oil press is a device that uses mechanical pressure to continuously extract vegetable oil. It is widely used in the processing of oil crops such as rapeseed, peanuts, soybeans, and sesame. During operation, the oilseeds are fed into the pressing chamber, and the rotation of the screw shaft propels the oilseeds forward. The space in the pressing chamber continuously narrows, generating strong pressure on the oilseeds, causing the oil to separate from the oilseeds and flow out from the oil outlet, while the residue is discharged from the outlet.

[0003] In existing screw oil presses, the area below the feed hopper consists of strip presses. After passing through the strip presses, the oilseeds are fed into the pressing chamber, which is composed of circular press rings. These circular press rings have multiple petal-shaped protrusions (see...). Figure 1 The lines connecting the highest points of the petal-shaped protrusions form a straight line (see...). Figure 2 The petal-shaped protrusions, along with the high-pressure pressing ring and screw press, work together to press oil crops. This type of oil press has the following shortcomings:

[0004] On the one hand, because the threaded surface on the pushing side of the screw press is perpendicular to the bottom surface of the screw press, oilseed residue will accumulate and stick at the connection point, affecting the material flow; on the other hand, because the petal-shaped protrusions on the circular press ring form a straight line, the oilseeds will be pushed onto the threaded surface during the screw press process, affecting the peristalsis of the oilseeds, making the oilseeds prone to dead material, sticking together, and even blockage, seriously affecting the pressing process.

[0005] In summary, a new technical solution is needed to address the aforementioned problems in the existing technology. Utility Model Content

[0006] The purpose of this invention is to provide a novel all-circular screw oil press. Compared with the prior art, the bar press is eliminated and replaced with a circular press ring, and oblique petal-shaped protrusions are set on the circular press ring. The petal-shaped protrusions form an oblique line after being arranged in the pressing chamber. In addition, the included angle between the threaded vertical surface on the pushing side of the screw and the bottom surface of the screw is set to a uniform obtuse angle, and the connection between the threaded vertical surface on the pushing side and the bottom surface of the screw forms an arc surface. Through the above settings, the smoothness of material flow is improved, and the oil crops are prevented from clogging in the pressing chamber.

[0007] The technical solution of this utility model is as follows:

[0008] A novel all-circular spiral oil press includes a base, with a transmission mechanism and a frame respectively installed at both ends of the base. A hopper and a pressing cage are sequentially connected between the transmission mechanism and the frame. A pressing ring assembly is tightly arranged inside the pressing cage. The pressing ring assembly is threadedly connected to the frame and locked with an adjusting nut. The pressing ring assembly forms a pressing chamber inside. A screw shaft that cooperates with the pressing chamber is also installed between the transmission mechanism and the frame. A screw is installed on the screw shaft. A cake adjusting mechanism is also installed on the frame. Each pressing ring that constitutes the pressing ring assembly has an oblique petal-shaped protrusion inside. The high points of the petal-shaped protrusions form an oblique line after being arranged inside the pressing chamber.

[0009] The angle between the threaded surface on the pushing side of the screw press and the bottom surface of the screw press is an obtuse angle. Furthermore, the connection between the threaded surface on the pushing side of the screw press and the bottom surface of the screw press forms an arc surface.

[0010] Furthermore, each of the pressing rings constituting the pressing ring group has 1-6 petal-shaped protrusions.

[0011] Furthermore, the obtuse angle is between 93° and 130°.

[0012] Furthermore, the screw press has a segmented structure, consisting of at least three segments arranged sequentially from the transmission mechanism to the frame.

[0013] Furthermore, the screw press has a segmented structure, with the diameter of the screw press surface increasing uniformly from the middle of the second screw press to the tail screw press.

[0014] Furthermore, the angle between the projection of the oblique line and the center line of the screw shaft on the same horizontal plane is between 3° and 30°.

[0015] Furthermore, the press cage is bolted to an isolation frame for segmented adjustment of the pressure between the press ring groups.

[0016] The present invention, by adopting the above technical solution, can bring the following beneficial effects:

[0017] This invention sets the angle between the threaded vertical surface on the pushing side of the screw press and the bottom surface of the screw press to an obtuse angle. The connection between the threaded vertical surface on the pushing side and the bottom surface of the screw press forms an arc surface. During the pushing process, the oil crops will spread outward along the arc surface and the threaded vertical surface. Combined with the oblique pushing line formed by the slanted petal-shaped protrusions on the pressing ring, the oil crops are always in a peristaltic state in the pressing chamber, which maximizes the pressing effect of the pressing ring and improves the smoothness of material flow, thus avoiding the blockage of oil crops in the pressing chamber. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a circular press ring in the prior art;

[0019] Figure 2A schematic diagram showing the lines connecting the highest points of the petals after the circular pressing rings are arranged in the existing technology;

[0020] Figure 3 This is a schematic diagram of the external structure of the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the circular press ring of this utility model;

[0022] Figure 5 This is a schematic diagram showing the lines connecting the highest points of the petals after the circular pressing rings of this utility model are arranged.

[0023] Figure 6 This is a schematic diagram of the screw press structure of this utility model. Figure 1 ;

[0024] Figure 7 This is a schematic diagram of the screw press structure of this utility model. Figure 2 ;

[0025] Figure 8 This is a schematic diagram of the structure of the isolation frame of this utility model;

[0026] Figure 9 This is a schematic diagram showing the connection relationship between the isolation frame, the pressing cage, and the pressing ring assembly of this utility model.

[0027] In the diagram, 1-base; 2-transmission mechanism; 3-frame; 4-hopper; 5-pressing cage; 6-pressing ring assembly; 7-pressing screw shaft; 8-pressing screw; 9-cake adjusting mechanism; 10-petal-shaped protrusion; 11-arc surface; 12-isolation frame; 13-high pressure pressing ring; 100-high point section. Detailed Implementation

[0028] like Figures 3-9 As shown, a novel all-circular spiral oil press includes a base 1. A transmission mechanism 2 and a frame 3 are respectively provided at both ends of the base 1. A hopper 4 and a pressing cage 5 are sequentially connected between the transmission mechanism 2 and the frame 3. A pressing ring group 6 is tightly arranged inside the pressing cage 5. The pressing ring group 6 is threadedly connected to the frame 3 and locked with an adjusting nut. The pressing ring group 6 forms a pressing chamber inside. A screw shaft 7 that cooperates with the pressing chamber is also provided between the transmission mechanism 2 and the frame 3. A screw 8 is provided on the screw shaft 7. A cake adjusting mechanism 9 is also provided on the frame 3. Each pressing ring constituting the pressing ring group 6 is a circular pressing ring, and each has an oblique petal-shaped protrusion 10 inside. The high point 100 of the petal-shaped protrusion 10 forms an oblique line after being arranged in the pressing chamber. The angle between the threaded vertical surface on the pushing side of the screw 8 and the bottom surface of the screw 8 is an obtuse angle. The connection between the threaded vertical surface on the pushing side and the bottom surface of the screw 8 forms an arc surface 11.

[0029] The oblique line formed by the high point 100 of the petal-shaped protrusions 10 on the pressing ring group 6, when combined with the screw press 8, reduces the obstruction to oil crops, thus facilitating the material flow. Moreover, the angle between the threaded vertical surface and the bottom surface of the screw press 8 is an obtuse angle, which can promote the tumbling and peristalsis of oil crops in the pressing chamber, and promote the extraction of oil from the oil crops. The arc surface 11 formed at the connection between the threaded vertical surface and the bottom surface of the screw press 8 can prevent the accumulation and adhesion of oil crop residues, and improve the smoothness of material flow.

[0030] In existing technology, the pressing ring of an oil press typically has about 10 petal-shaped protrusions. Correspondingly, the high points of these petal-shaped protrusions 100 are arranged to form about 10 straight lines. The excessive number of petal-shaped protrusions causes the screw 8 to push the material cake against the front wall of the screw during the feeding process, as the screw thread is oblique. This makes the oil crops very easy to be excessively ground due to adhesion and retention, or the material may feed very slowly, or it may not feed at all, forming a dead cake.

[0031] In this embodiment, the number of oblique petal-shaped protrusions 10 on each pressing ring group 6 is set to 1-6. Correspondingly, the number of oblique lines formed by the high points 100 of the petal-shaped protrusions 10 after being arranged in the pressing chamber is also 1-6. The oblique lines push the material along the spiral direction, and the cake is easily pushed away. The cake will not be repeatedly ground due to stagnation, resulting in excessive mud. The material flow becomes easy and smooth, and high temperature will not be generated due to slow material flow. In this way, the oil is clear and the cake quality is excellent. It should be noted that the angle between the projection of the oblique lines formed by the petal-shaped protrusions 10 and the center line of the screw shaft 7 on the same horizontal plane is preferably between 3° and 30°.

[0032] Thanks to improvements in the structure and number of petals on the pressing ring, as well as improvements to the screw 8, the oil crops are fully tumbled and peristaltic when squeezed in the pressing chamber. The oil crops are not excessively rubbed in the pressing chamber to form oil sludge, the oil is clearer, and the oil channels on the pressing ring are less prone to blockage. Both material flow and oil discharge are smoother. Compared with existing technologies, the improvement in performance is quite significant.

[0033] Specifically, the obtuse angle formed between the threaded vertical surface of the screw 8 and the bottom surface of the screw 8 is between 93° and 130°. The screw 8 adopts a segmented structure, and each segment of the screw 8 is connected to the screw shaft 7 by a key. This segmented structure facilitates the maintenance and replacement of the screw 8. When one segment of the screw 8 is damaged, it can be replaced individually without replacing the whole thing, thus reducing maintenance costs.

[0034] In this embodiment, the screw 8 is divided into at least three segments, arranged sequentially from the transmission mechanism 2 to the frame 3, as #1, #2, #3...#n. Screw #1 is located below the hopper 4. The position of screw #2 needs to be described relative to existing oil presses. Because this embodiment replaces the strip press with a circular pressing ring compared to existing technologies, screw #2 is located where the original strip press was. From the middle of screw #2 to the tail section #n, the diameter of the bottom surface of screw 8 increases uniformly, forming a pressure ramp. In contrast, in existing oil presses of the same specifications as this embodiment, the starting position of the pressure ramp on the screw 8 is at the strip... If the starting position of the pressure ramp is inside the bar, the gaps in the bar will cause serious slag leakage, severely affecting oil flow and material flow. Taking the screw press 8 of this embodiment as an example, the pressure ramp of the oil press of the same specification as this embodiment starts at the #3 screw press 8 in the prior art, while the pressure ramp of the screw press 8 in this embodiment starts from the middle position of #2. Obviously, the slope of the pressure ramp of the screw press 8 in this embodiment is gentler than the slope of the pressure ramp of the screw press 8 in the prior art. Correspondingly, the pressure increase process of the oil crops in the pressing chamber is also gentler, the material flow process is more stable and continuous, and the slag leakage rate is reduced accordingly.

[0035] Currently, most oil presses on the market have a staged pressing function. This is achieved by using high-pressure pressing rings 13 to separate the pressing rings 6, resulting in different pressing pressures in different sections of the pressing chamber, allowing for more comprehensive pressing of oil crops. The gap between the pressing rings can be adjusted by tightening the nuts; a larger gap results in smoother oil flow but also more residue. This adjustment is overall and cannot be adjusted segmentally, often leading to blockages of oil crops within the pressing chamber due to improper adjustment.

[0036] Therefore, in this embodiment, the pressing cage 5 is bolted to an isolation frame 12 for segmented adjustment of the pressure between the pressing rings 6; the isolation frame 12 includes a base 1 and a stop block, wherein the base 1 is bolted to the pressing cage 5, one end of the stop block is fixedly connected to the base 1, and the other end abuts against the side of the pressing ring; it should be noted that in order to ensure balanced force, at least two isolation frames 12 should be evenly distributed around the same pressing ring.

[0037] Furthermore, to elaborate further, the high-pressure pressing ring 13 of existing oil presses all adopt a wide ring (a high-pressure pressing ring with a large width). This high-pressure pressing ring 13 gradually narrows from both ends to the middle, that is, the middle part of the pressing ring has a small diameter. In fact, only the front half of the pressing ring in the direction of the oil crop movement plays a role in increasing pressure, and the space in the rear half is wasted. It is possible to explore and try to use a narrow ring for the high-pressure pressing ring 13, that is, the width is only half of the existing high-pressure pressing ring 13, and only the front half that plays a role in increasing pressure is retained. Then, under the premise that the length of the pressing chamber is fixed, more pressing rings can be added to the pressing ring group 6. This setting can increase the effective length of the pressing chamber and improve the pressing effect. This part is only an extension and is not intended to limit this utility model.

[0038] In summary, this utility model provides a novel all-circular screw oil press. Compared to existing technologies, it eliminates the bar press and adopts a completely circular press ring. Furthermore, structural optimizations have been made to the petal-shaped protrusions 10 within the press ring and the screw 8, enabling this utility model to achieve advantages such as fast and stable material flow, minimal residue, and clear oil. It is highly worthy of widespread promotion. Moreover, upgrading existing oil presses to the one provided by this utility model is not difficult. It only requires replacing the bar press and press ring assembly 6 with the circular press ring of this utility model, replacing the press cage 5, and modifying the screw 8. All other components can be reused, greatly reducing modification costs.

[0039] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any equivalent substitutions and modifications made by those skilled in the art without departing from the guidance of the present utility model shall be deemed to fall within the protection scope of the present utility model.

Claims

1. A novel all-circular spiral oil press, comprising a base (1), wherein a transmission mechanism (2) and a frame (3) are respectively provided at both ends of the base (1), a hopper (4) and a pressing cage (5) are sequentially connected between the transmission mechanism (2) and the frame (3), a pressing ring group (6) is tightly arranged inside the pressing cage (5), the pressing ring group (6) is threadedly connected to the frame (3) and locked with an adjusting nut, the pressing ring group (6) forms a pressing chamber inside, a pressing screw shaft (7) cooperating with the pressing chamber is also provided between the transmission mechanism (2) and the frame (3), a pressing screw (8) is provided on the pressing screw shaft (7), and a cake adjusting mechanism (9) is also provided on the frame (3), characterized in that: Each of the pressing rings constituting the pressing ring group (6) has an oblique petal-shaped protrusion (10) inside, and the high point part (100) of the petal-shaped protrusion (10) forms an oblique line after being arranged in the pressing chamber; The angle between the threaded vertical surface of the upper pushing side of the screw (8) and the bottom surface of the screw (8) is an obtuse angle.

2. The novel all-circular spiral oil press according to claim 1, characterized in that: The connection between the threaded vertical surface of the pushing side and the bottom surface of the screw (8) forms an arc surface (11).

3. The novel all-circular spiral oil press according to claim 1, characterized in that: The number of petal-shaped protrusions (10) on each of the pressing rings constituting the pressing ring group (6) is 1-6.

4. The novel all-circular spiral oil press according to claim 1, characterized in that: The obtuse angle is between 93° and 130°.

5. The novel all-circular spiral oil press according to claim 1, characterized in that: The screw press (8) has a segmented structure, consisting of at least 3 segments arranged sequentially from the transmission mechanism (2) to the frame (3).

6. The novel all-circular spiral oil press according to claim 5, characterized in that: The diameter of the screw (8) increases uniformly from the middle of the second screw section to the tail screw section.

7. The novel all-circular spiral oil press according to claim 1, characterized in that: The angle between the projection of the oblique line and the center line of the screw shaft (7) on the same horizontal plane is between 3° and 30°.

8. The novel all-circular spiral oil press according to claim 1, characterized in that: The press cage (5) is bolted to an isolation frame (12) for segmented adjustment of the pressure between the press ring groups (6).

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