CN210047121U - Be applied to and squeeze spiral shell subassembly that low temperature was squeezed or oil palm etc. hard oil squeezes - Google Patents

Abstract

The utility model relates to a squeezing screw component applied to low-temperature squeezing or squeezing of hard oil materials such as oil palm and the like, which comprises a squeezing cage, a plurality of squeezing strips, a squeezing screw, a driving shaft and a driver, wherein an oil discharge pipeline is formed at the bottom of the squeezing cage, and a feeding channel and a cake outlet channel are arranged at the two end parts; the pressing screw comprises a screw body and a spiral sheet; a cavity is formed inside the pressing cage, an oil cavity is formed between the pressing cage and the plurality of pressing strips, and an oil discharge pipeline penetrates through the cavity and is communicated with the oil cavity; the driving shaft is provided with a groove which is sunken inwards from the surface, a channel is formed between the groove and the inner wall of the screw body, and the screw squeezing assembly comprises a first condensing unit and a second condensing unit which are used for adding a flowable cooling medium into the cavity and the channel respectively. On one hand, the utility model increases the strength of the pressing screw and prolongs the service life of the pressing screw through the arrangement of the continuous spiral piece; on the other hand, the temperature of the extracting screw and the extracting barrel is reduced by the flow of the cooling medium in the cavity and the channel, thereby obtaining high-quality oil and cake.

Description

Be applied to and squeeze spiral shell subassembly that low temperature was squeezed or oil palm etc. hard oil squeezes

Technical Field

The utility model belongs to the oil squeezes the equipment field, concretely relates to be applied to the hard oil such as low temperature squeezes or oil palm and squeezes spiral shell subassembly.

Background

The method of extracting oil by squeezing oil from oil by mechanical external force is called squeezing method, which is an old method and has a long history and a long development process. From the beginning of the first Anderson oil presses in the early 20 th century, screw oil presses have been the main oil press in China. The screw oil press is a more advanced continuous pressing oil making device which is generally adopted in the modern world, and compared with an intermittent pressing method (such as a hydraulic oil press), the screw oil press has the remarkable characteristics that: the method is suitable for processing various oil materials, has continuous production, large single machine treatment capacity, good oil outlet effect, easy crushing of thin cakes, contribution to comprehensive utilization, low labor intensity and the like, but also has the problems of large power consumption, high maintenance cost, poor quality of the oil cakes compared with intermittent squeezing and the like. Because of the characteristics of the pressed oil and the defects of the leaching method, the pressed oil has a large specific gravity in the modern oil preparation industry, the pressed oil can be divided into primary pressing and pre-pressing, the primary pressing is called full pressing, the oil in the pressed material is required to be pressed as much as possible, the pre-pressing only requires that about 60-70% of the oil in the pressed oil is pressed, and then the pre-pressed cake is leached to obtain the oil.

Compared with other oil preparation methods, the oil preparation method by squeezing has the advantages of simple process, less matched equipment, strong adaptability to oil varieties, flexible production, good oil product quality, light color, pure flavor and the like.

The process of squeezing and taking oil, namely the process of squeezing oil from a squeezed material by means of the action of mechanical external force, with the further research of the theory of squeezing and taking oil, people have further knowledge on various factors influencing the efficiency of squeezing and taking oil and the mutual relation thereof, and according to the rule that liquid moves along a capillary and moves through a porous medium, the following conditions are met in order to squeeze the oil as much as possible: (1) the larger the hydraulic pressure of the grease in the channel inside the material is, the better the grease is; (2) the larger the diameter of the oil flow capillary tube in the pressing process, the more the number of the oil flow capillary tubes, the better the pressing process; (3) the shorter the length of the oil flow capillary tube, the better; (4) the squeezing time is as long as possible within a certain limit; (5) the lower the viscosity of the grease under pressure, the better.

Factors affecting oil press oil yield and capacity:

(1) the pressure in the barrel and the pressure in the barrel space are caused by the reaction of the squeezed materials on the corresponding parts of the structure of the squeezer, and meanwhile, the pressure in the barrel space is the driving force in the squeezing process, so that the elasticity and plasticity of the cooked blank are properly matched in order to ensure that the grease is fully squeezed by the pressure generated in the barrel space, namely, the cooked blank has a proper structure.

(2) The influence of temperature, which directly influences the oil extraction depth and the quality of the pressed grease and cake, is that pressing with a cold unheated oil press, which generally cannot obtain a formed hard pressed cake, presses the maximum amount of grease, and when the temperature rises to 70-80 ℃, hard cake blocks and normal oil flow begin to form, and the pressing temperature is maintained by the temperature of the cooked blank supplied by a steamer, but the heat generated by friction among the cooked blank, a pressing cage and a pressing screw greatly exceeds the heat loss and the normal heat required by cake formation in the press, so that the establishment of a heat balance relationship is the key point for obtaining high-quality oil and cake.

(3) The longer the pressing time is, the more complete the grease is pressed out, and the lower the production capacity of the oil press is, and the pressing time when performing pre-pressing is shorter than the one-time pressing time. On the premise of meeting the oil production efficiency, the squeezing time is shortened as much as possible.

At present, a plurality of screw oil presses are adopted, the pressed materials are continuously pushed forward under the propelling action of a rotating screw shaft in a barrel, meanwhile, the space volume of the barrel is continuously reduced to press the pressed materials due to the shortening of the screw pitch of the pressing screw shaft, the increase of the diameter of a root circle and the reduction of the inner diameter of the barrel, after the pressed materials are compressed, grease is extruded and flows out from the gap of a pressing cage, and meanwhile, the pressed materials are pressed into cakes and are discharged from the tail end of the barrel.

However, when the screw shaft is an integral screw shaft, the replacement of the entire shaft is not economical because the screw shaft is easily worn out. The screw is easy to wear, the hardness is insufficient, and the service life of the screw is short. When the sleeved spiral shaft is used, the pressing screws are assembled on the spiral shaft in a section, the assembly is complicated, the manufacturing of the pressing screws is troublesome, single sections of the pressing screws are easy to wear and damage, particularly when palm fruits are pressed, the palm kernels are hard in texture, the wear of the pressing screws in the processing process is quite large, generally, a set of pressing screws which are just delivered from a factory needs manual surfacing repair after the service life of the pressing screws does not exceed 3 weeks, and the use cost is very high.

Meanwhile, a large amount of heat energy is generated due to friction in the pressing process, and the compression ratio is reduced and the quality of the oil cake is deteriorated due to overheating of the pressed materials, and even the pressing effect is seriously influenced.

Disclosure of Invention

The utility model aims to solve the technical problem that overcome prior art not enough, provide a modified and guaranteeing to press under the higher prerequisite of intensity and the hardness of spiral shell, can control the spiral shell subassembly that presses of the temperature of extracting oil.

In order to solve the technical problem, the utility model discloses take following technical scheme:

a squeezing screw assembly applied to low-temperature squeezing or squeezing of hard oil such as oil palm and the like comprises a squeezing cage, a plurality of squeezing strips, a squeezing screw, a driving shaft and a driver, wherein the squeezing strips extend along the length direction of the squeezing cage and are positioned on the inner wall of the squeezing cage;

the squeezing screw comprises a screw body fixedly sleeved on the periphery of the driving shaft and a spiral sheet spirally and continuously wound on the periphery of the screw body along the length direction of the screw body;

a cavity is formed inside the pressing cage, an oil cavity is formed between the inner wall of the pressing cage and the plurality of pressing strips, and an oil discharge pipeline penetrates through the cavity and is communicated with the oil cavity;

the drive shaft is provided with a groove which is inwards sunken from the surface, a channel which is opened from two end parts is formed between the groove and the inner wall of the screw body, and the screw squeezing assembly comprises a first condensation unit and a second condensation unit which are respectively used for adding a flowable cooling medium into the cavity and the channel.

Preferably, the flow direction of the cooling medium in the cavity is opposite to the flow direction of the cooling medium in the channel.

Specifically, the flow direction of the cooling medium in the channel is the same as the movement direction of the oil cake extruded by the pressing screw.

According to a specific implementation and preferred aspect of the invention, the recess has many, and round the circumference evenly distributed of drive shaft. Thus, the temperature of the pressing screw can be uniformly reduced.

According to another embodiment and preferred aspect of the present invention, the first condensing unit includes a water inlet pipe and a water outlet pipe respectively disposed at both ends of the squeezing cage and a cooling water circulating part communicated with the water inlet pipe and the water outlet pipe to enable the cooling water in the cavity to be in a flowing state.

The water inlet pipe is positioned above the cake outlet end of the pressing screw corresponding to the pressing cage, and the water outlet pipe is positioned below the feeding end of the pressing screw corresponding to the pressing cage.

According to another embodiment and preferred aspect of the present invention, the shaft seats are fixedly disposed at both ends of the driving shaft, wherein the shaft seats are formed with solute cavities inside, and both ends of the passage are respectively communicated with the solute cavities corresponding to the ends, the second condensing unit includes two solute cavities for cooling fluid and a cooling fluid circulating part, wherein the cooling fluid in the passage is always in a flowing state under the circulating operation of the cooling fluid circulating part.

Specifically, the shaft seat is arranged on the end part of the screw body and the driving shaft protruding out of the end part of the screw body through sealing elements.

In addition, the screw body and the flight integrated into one piece set up, and the material is 40cr steel. The strength of the pressing screw is enhanced, and the service life is prolonged.

Furthermore, the press screw also comprises a tungsten carbide layer which is formed on the surfaces of the screw body and the spiral piece by spraying. The tungsten carbide further reduces the abrasion of the pressing screw and prolongs the service life of the pressing screw.

Due to the implementation of the above technical scheme, compared with the prior art, the utility model have the following advantage:

on one hand, the utility model increases the strength of the pressing screw and prolongs the service life of the pressing screw through the arrangement of the continuous spiral piece; on the other hand, the temperature of the extracting screw and the extracting barrel is reduced by the flow of the cooling medium in the cavity and the channel, thereby obtaining high-quality oil and cake.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

FIG. 1 is a schematic structural view (partially in section) of a screw assembly of the present invention;

FIG. 2 is a schematic longitudinal cross-sectional view of the expeller screw assembly of FIG. 1;

wherein: 1. a pressing cage; 10. a cavity; 1a, an oil discharge pipeline; 1b, a feeding channel; 1c, a cake outlet channel;

2. squeezing into strips; q, an oil cavity;

3. pressing the snails; 30. a screw body; 31. a spiral sheet; t, a channel;

4. a drive shaft; 40. a groove;

5. a first condensing unit; 50. a water inlet pipe; 51. a water outlet pipe;

6. a second condensing unit;

7. a shaft seat;

8. and a seal.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature. It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1, the screw assembly according to the present embodiment for low temperature pressing or pressing of hard oil such as oil palm includes a pressing cage 1, a plurality of pressing bars 2 extending along the length direction of the pressing cage 1 and positioned on the inner wall of the pressing cage 1, a pressing screw 3 located inside a pressing chamber formed by the plurality of pressing bars 2, a driving shaft 4 passing through the middle of the pressing screw 3, and a driver (not shown, but not shown, for example, a combination of a motor and a driving belt) for driving the driving shaft 4 to rotate around its axis.

An oil discharge pipeline 1a is formed at the bottom of the squeezing cage 1, and a feeding channel 1b and a cake discharging channel 1c communicated with the squeezing chamber are respectively arranged on the shells at the two ends.

Referring to fig. 2, a cavity 10 is formed inside the press cage 1, an oil cavity q is formed between the inner wall of the press cage 1 and the plurality of press bars, an oil discharge pipeline 1a penetrates through the cavity 10 to be communicated with the oil cavity q, and a material inlet channel 1b and a cake outlet channel 1c penetrate through the cavity 10 and the oil cavity q respectively to be communicated with the press chamber.

The squeezing screw 3 comprises a screw body 30 fixedly sleeved on the periphery of the driving shaft 4, a spiral piece 31 spirally and continuously wound on the periphery of the screw body 30 along the length direction of the screw body 30, and a tungsten carbide layer sprayed and formed on the surfaces of the screw body 30 and the spiral piece 31, wherein the abrasion of the squeezing screw is reduced through the tungsten carbide layer, and the service life of the squeezing screw 3 is prolonged.

Specifically, the thickness of the tungsten carbide layer is 0.2-0.5 mm, in this example the thickness of the tungsten carbide layer is 0.3 mm.

Further, the screw body 30 and the spiral piece 31 are integrally formed and made of 40cr steel. The strength of the squeezer 3 is enhanced, and the service life is prolonged

The drive shaft 4 is formed with a groove 40 recessed inward from the surface, wherein a passage t opened from both end portions is formed between the groove 40 and the inner wall of the screw body 30.

The grooves 40 are plural and evenly distributed around the circumference of the drive shaft 4. Thus, the temperature of the pressing screw can be uniformly reduced.

In this case, the above-mentioned assembly further comprises a first condensation unit 5 and a second condensation unit 6 for feeding a flowable cooling medium into the cavity 10 and the channel t, respectively.

In particular, the flow direction of the cooling medium in the cavity 10 is opposite to the flow direction of the cooling medium in the channel t.

In this case, the flow direction of the cooling medium in the channel t is the same as the direction of movement of the cake pressed out by the expeller screw 3.

The first condensation unit 5 comprises a water inlet pipe 50 and a water outlet pipe 51, which are respectively arranged at both ends of the extraction cage 1 in communication, and a cooling water circulation part (not shown, but not shown) in communication with the water inlet pipe 50 and the water outlet pipe 51, which enables the cooling water in the cavity to be in a flowing state.

Here, the applicant briefly describes a cooling water circulation component, which at least comprises a water tank, a water pump and a water pipe, wherein the water pipe connects a water outlet of the water pump with the water inlet pipe 50, so that water can flow in the cavity 10, and then the water pipe connects the water outlet pipe 51 with the water tank, so that water flows back to the water tank, circulation is realized, and water in the cavity 10 is always in a flowing state.

Specifically, the water inlet pipe 50 is positioned above the cake outlet end of the squeezer 3 corresponding to the squeezing cage 1, and the water outlet pipe 51 is positioned below the feeding end of the squeezer 3 corresponding to the squeezing cage 1.

Shaft seats 7 are fixedly arranged at two ends of the driving shaft 4, solute cavities are formed in the shaft seats 7, two ends of the channel t are respectively communicated with the solute cavities at the corresponding ends, the second condensing unit 6 comprises cooling liquid and a cooling liquid circulating component which are contained in the two solute cavities, and under the circulating work of the cooling liquid circulating component, the cooling liquid in the channel t is always in a flowing state.

Here, the applicant also explains a cooling liquid circulation unit including at least a circulation line communicating two solute cavities, and a circulation pump provided on the circulation line, wherein the cooling liquid of the two solute cavities is circulated by the circulation pump so that the cooling liquid is always in a flowing state in the passage t.

In addition, the shaft seat 7 is provided on the end of the screw body 30 and the drive shaft 4 emerging from the end of the screw body 30 via a seal 8.

In conclusion, the screw component of the embodiment can be used for a low-temperature cold pressing process, the low-temperature cold pressing process mainly prepares natural oil with original fragrance, the pressing is carried out at the barrel temperature lower than 60 ℃, and because a large amount of friction heat is generated during pressing, the barrel temperature of the traditional oil press is far higher than 60 ℃, and the screw component cannot be applied to the low-temperature cold pressing process.

Secondly, in this embodiment, a circulating cooling liquid channel is designed in the interior of the pressing screw, the outer layer is a cooling water jacket of the pressing cage, and under the action of flowing cooling liquid and cooling water, heat generated by friction between the pressing material and the pressing chamber is conducted and taken away in the inner and outer directions, so that the normal temperature of the pressing chamber is maintained, and the temperature of the discharged cake is below the required temperature.

Finally, the screw rod body and continuous flight integrated into one piece of this application, by the setting on the tungsten carbide layer on surface simultaneously, the intensity of the enhancement squeeze spiral, consequently, can be used to squeezing of the hard oil of texture such as palm benevolence, and the first life of the squeeze spiral of current oil press does not exceed 3 weeks, just need artifical the repair, the squeeze spiral of this novel oil press, use alloy cast iron to replace low carbon steel to make and squeeze the spiral, intensity and hardness are strengthened greatly, the reinforcing wear resistance can, first life can reach two months, through repairing repeatedly usable four to five times, make and squeeze spiral general life and exceed 6 months, the life of squeeze spiral has been prolonged, greatly reduced manufacturing cost.

The present invention has been described in detail, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the same, and the scope of the present invention is not limited thereto, and the present invention is not limited to the above-mentioned embodiments, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the scope of the present invention.

Claims (10)

1. A squeezing screw component applied to low-temperature squeezing or squeezing of hard oil such as oil palm and the like comprises a squeezing cage, a plurality of squeezing bars which extend along the length direction of the squeezing cage and are positioned on the inner wall of the squeezing cage, a squeezing screw which is positioned inside a squeezing chamber formed by the plurality of squeezing bars, a driving shaft which penetrates through the middle part of the squeezing screw and a driver which drives the driving shaft to rotate around the axis of the driving shaft, wherein an oil discharge pipeline is formed at the bottom of the squeezing cage, and a feeding channel and a cake discharging channel which are communicated with the squeezing chamber are respectively arranged on the shells at the two end parts,

the method is characterized in that:

the squeezing screw comprises a screw body fixedly sleeved on the periphery of the driving shaft and a spiral sheet which is spiral along the length direction of the screw body and continuously wound on the periphery of the screw body;

a cavity is formed inside the squeezing cage, an oil cavity is formed between the inner wall of the squeezing cage and the plurality of squeezing strips, and the oil discharge pipeline penetrates through the cavity and is communicated with the oil cavity;

the driving shaft is provided with a groove which is inwards sunken from the surface, a channel which is opened from two end parts is formed between the groove and the inner wall of the screw body, and the screw squeezing assembly comprises a first condensation unit and a second condensation unit which are respectively used for adding a flowable cooling medium into the cavity and the channel.

2. The screw press assembly as claimed in claim 1, wherein the screw press assembly is used for low temperature pressing or pressing of hard oil such as oil palm, and is characterized in that: the flow direction of the cooling medium in the cavity is opposite to the flow direction of the cooling medium in the channel.

3. The screw press assembly as claimed in claim 2, wherein the screw press assembly is used for low temperature pressing or pressing of hard oil such as oil palm, and is characterized in that: the flow direction of the cooling medium in the channel is the same as the movement direction of the oil cake extruded by the pressing screw.

4. The screw press assembly as claimed in claim 1, wherein the screw press assembly is used for low temperature pressing or pressing of hard oil such as oil palm, and is characterized in that: the grooves are multiple and evenly distributed around the circumference of the driving shaft.

5. The screw press assembly as claimed in claim 1, wherein the screw press assembly is used for low temperature pressing or pressing of hard oil such as oil palm, and is characterized in that: the first condensing unit comprises a water inlet pipe and a water outlet pipe which are respectively arranged at two end parts of the squeezing cage and communicated with each other, and a cooling water circulating part which is communicated with the water inlet pipe and the water outlet pipe and can enable cooling water in the cavity to be in a flowing state.

6. The screw press assembly applied to low-temperature pressing or oil palm and other hard oil pressing as claimed in claim 5, wherein: the water inlet pipe is positioned above the cake outlet end part of the pressing screw corresponding to the pressing cage, and the water outlet pipe is positioned below the feeding end part of the pressing screw corresponding to the pressing cage.

7. The screw press assembly as claimed in claim 1, wherein the screw press assembly is used for low temperature pressing or pressing of hard oil such as oil palm, and is characterized in that: the two ends of the driving shaft are fixedly provided with shaft seats, solute cavities are formed in the shaft seats, the two ends of the channel are communicated with the solute cavities corresponding to the ends respectively, the second condensation unit comprises cooling liquid and a cooling liquid circulating component which are contained in the two solute cavities, and the cooling liquid in the channel is always in a flowing state under the circulating work of the cooling liquid circulating component.

8. The screw press assembly as claimed in claim 7, wherein the screw press assembly is used for low temperature pressing or pressing of hard oil such as oil palm, and is characterized in that: the shaft seat is arranged on the end part of the screw body and the driving shaft protruding out of the end part of the screw body through sealing elements.

9. The screw press assembly as claimed in claim 1, wherein the screw press assembly is used for low temperature pressing or pressing of hard oil such as oil palm, and is characterized in that: the screw rod body with flight integrated into one piece sets up, and the material is 40cr steel.

10. The screw press assembly as claimed in claim 1, wherein the screw press assembly is used for low temperature pressing or pressing of hard oil such as oil palm, and is characterized in that: the pressing screw further comprises a tungsten carbide layer formed on the surfaces of the screw body and the spiral piece in a spraying mode.

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