Olive Fruit Green Color Retention Processing Apparatus and Method

Abstract

To provide an olive fruit green keeping and processing device and method.SOLUTION: A green keeping and processing device comprises a cylindrical body 10, a conveying auger 20, a conveying motor 1, a telescopic mechanism 2, and a water feeding pump 3. The inside of the cylindrical body is divided into an upper cylindrical cavity 11 and a lower cylindrical cavity 12. A plurality of nozzle holes 14 is provided on the cylindrical wall of the upper cylindrical cavity. The water feeding pump communicates with a nozzle hole through a water supply pipeline 3a. A vertically slidable first piston plate 31 is provided inside the lower cylindrical cavity. A telescopic end of the telescopic mechanism is connected to the first piston plate, and the first piston plate is driven to move vertically. An alkaline solution inlet 12a and an acidic liquid inlet 12b are installed on the side wall of the lower cylindrical cavity. An acidic liquid discharge outlet 12d, an alkaline solution discharge outlet 12c, and a clean water discharge outlet 12e are installed on the bottom of the lower cylindrical cavity.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to the technical field of processing of fruits harvested in large quantities, and particularly to an olive fruit green color retention processing device and method.

Background Art

[0002] Olive (Olea europaea) is an important oil crop and food crop in the world. Olive fruits are rich in unsaturated fatty acids, and also contain abundant functional components such as vanillic acid, caffeic acid, p-coumaric acid, arabic acid, maslinic acid, hydroxytyrosol, luteolin, apigenin, quercetin, tyrosol, etc. Since olives have effects such as antioxidant effect, antibacterial effect, anti-inflammatory effect, antitumor effect, and anticancer effect, continuous intake is beneficial to sub-healthy people.

[0003] Currently, the olives introduced into the country are mainly used for the production of olive oil, but the expandability of the industrial chain is not high. Olive foods in the domestic market are single, and the technology related to the development of olive products still remains at the research and development stage in the laboratory and cannot be transferred to actual production. Edible olives are often used for processing canned olive fruits. However, since olive fruits contain bitter glucosides and tannin substances, maintaining the color of the fruits throughout the processing process is a bottleneck problem in the canned olive processing. If the concentration of the alkaline solution cannot be properly controlled, the fruits will turn black or the skin will be easily peeled off. If the dealkalization in the dealkalization process is incomplete, the liquid in the can will become turbid or the color will be too dark, and the quality will be too poor.

[0004] Also, the conventional methods for debittering and dealkalizing olive fruits are relatively inefficient. Since there are many such processes and it takes a long time to connect the processes, olive fruits are easily exposed to air for a long time, which easily causes a decrease in color and quality due to oxidation.

Summary of the Invention

Problems to be Solved by the Invention

[0005] The object of the present invention is to provide an olive fruit green color retention processing device and method for solving at least one of the above-described technical problems in the prior art.

Means for Solving the Problems

[0006] In order to solve the above-described technical problems, the olive fruit green color retention processing method according to the present invention includes steps S10, S20, S30, S40, and S50. In S10, the picked olive fruits are washed with clean water to perform the first cleaning for removing dirt on the surface. In S20, the olive fruits are immersed for a set time using a sodium hydroxide alkaline solution at a set concentration to perform deoleuropein removal of the olive fruits. In S30, the second cleaning is performed to wash the alkaline solution on the surface of the olive fruits with clean water. In S40, the olive fruits are immersed using an organic acid citric acid aqueous solution to perform dealkalization for performing a dealkalization treatment on the olive fruits. In S50, a color protection freshness retention treatment is performed to perform color protection on the olive fruits using a color protection agent.

[0007] Further, the color protection agent contains 0.005% sodium copper chlorophyllin, 0.02% carotene powder, 0.03% lutein powder, and 0.5% calcium L-ascorbate.

[0008] Further, in step S50, the olive fruits are immersed for 2 to 10 hours using a color protection agent.

[0009] The color protection method of the present application can keep the olive fruits after debittering and dealkalization in a bright yellowish green color. Instead of the magnesium atoms in the chlorophyll structure in the conventional green protection agent method, low reagent agents such as copper, zinc, and magnesium are used. The residue of copper in the green protection detection is 0.5 ppm, which is much lower than the national health standard requirement (below 10 ppm). In the canning of olive fruits, it is a very hygienic and safe method. In the present application, the combination of the color protection agent is used for dipping, and the subsequent hardening and brittleness retention processes are reduced, and the addition of the hardening agent is reduced. Even after the obtained canned olives undergo high-temperature sterilization, they do not become soft or lose their crunchiness.

[0010] Also, the concentration of the aqueous solution of the organic acid citric acid is 0.3% - 0.5%.

[0011] Also, it further includes step S60. In S60, heat treatment is performed on the olive fruits after the color protection treatment to prevent discoloration, and the discoloration-prevented olive fruits are put into a can, sealed, and sterilized.

[0012] Also, in step S20, the mass concentration of the sodium hydroxide alkaline solution is 1.5% - 3%.

[0013] Also, in step S20, the olive fruits are immersed in the sodium hydroxide alkaline solution for 10 - 15 hours.

[0014] The present invention has the following beneficial effects.

[0015] 1. Realize the diversification of olive fruit products, expand the olive industrial chain. The canned olive fruits obtained have a crude fat content of 15% - 20%, protein of 1.58% - 3.24%, total amino acids of 3.28% - 4.55%, total carbohydrates of 2.89 - 4.12%, total polyphenols of 0.1% - 0.3%, flavonoids of 0.1% - 0.28%. The longer the shelf life, the more beneficial it is for the gradual release of the functional components of the human body, and the pharmacological effects of the effective physiological active components of olive fruits can be fully exerted.

[0016] 2. The manufacturing process is simple, easy to operate, has a short production cycle, and can be easily operated at home, which helps to realize industrial production, further promotes and improves the development of the olive industrial chain, increases the added value of products, and contributes to promoting the economic development of the olive cultivation areas in Yunnan Province.

[0017] In a second aspect of the present application, an olive fruit green color retention processing device is provided. The olive fruit green color retention processing device includes a cylindrical main body, a conveying auger, a conveying motor, a telescopic mechanism, and a water supply pump. The cylindrical main body is installed vertically, and the interior of the cylindrical main body is divided into an upper cylindrical cavity and a lower cylindrical cavity. The conveying auger is installed in the upper cylindrical cavity, and a material inlet / outlet is installed at the top of the side wall of the upper cylindrical cavity. The power transmission shaft of the conveying motor is connected to the conveying auger and is used to drive the conveying auger to rotate. A plurality of nozzle holes are installed on the cylindrical wall of the upper cylindrical cavity. The water supply pump communicates with the nozzle holes through a water supply pipeline and is used to spray purified water into the upper cylindrical cavity through the nozzle holes to wash the material on the conveying auger. A first piston plate capable of sliding up and down is installed in the lower cylindrical cavity. The telescopic end of the telescopic mechanism is connected to the first piston plate and is used to drive the first piston plate to move up and down. A plurality of first water passing holes communicating up and down are installed on the first piston plate. An alkali liquid inlet and an acid liquid inlet used to respectively input alkali liquid and acid liquid into the lower cylindrical cavity are installed on the side wall of the lower cylindrical cavity. An acid liquid discharge port, an alkali liquid discharge port, and a purified water discharge port used to respectively discharge alkali liquid, acid liquid, and purified water are installed at the bottom of the lower cylindrical cavity.

[0018] Preferably, the alkali liquid inlet and the acid liquid inlet are installed at the upper part of the side wall of the lower cylindrical cavity.

[0019] Preferably, the conveying motor is installed at the top of the cylindrical main body. Also, the telescopic mechanism is installed at the bottom of the cylindrical main body. In addition, the conveying auger includes a central shaft main body and spiral blades. The outer diameter of the spiral blades matches the inner wall diameter of the cylindrical main body (upper cylindrical cavity) (the outer diameter of the spiral blades is equal to or slightly smaller than the inner diameter of the cylindrical main body). A plurality of water permeable holes are provided in the spiral blades, and the diameter of the water permeable holes is smaller than the particle size of the olive fruits, so as to prevent the olive fruits from falling through the gap between the spiral blades and the inner wall of the color protection cylinder and through the water permeable holes.

[0020] In addition, an annular intermediate layer cavity is provided outside the side wall of the upper cylindrical cavity.

[0021] The inlet of the nozzle hole is installed in the annular intermediate layer cavity, and the water supply pipeline communicates with the nozzle hole through the annular intermediate layer cavity.

[0022] In addition, above the lower cylindrical cavity and above the first piston plate, a second piston plate is installed so as to be slidable up and down. A second water passage hole is provided in the second piston plate. (In the horizontal projection plane), the first water passage hole and the second water passage hole are completely offset, and the first piston plate and the second piston plate form a partition plate group that is in close contact up and down to prevent water from passing through.

[0023] When the telescopic end of the telescopic mechanism extends, the partition plate group is placed in the intermediate region between the upper cylindrical cavity and the lower cylindrical cavity, and the upper cylindrical cavity forms a water storage cavity for soaking olive fruits.

[0024] By installing the second piston plate, the first piston plate and the second piston plate are in close contact up and down to form the upper cylindrical cavity into a water storage cavity, and further, it can be used in step S30 to perform dealkalization by the purified water immersion method.

[0025] Whether the spraying method or the dipping method is used, after the first piston plate and the second piston plate are separated, all the purified water generated in step S30 can flow into the lower cylindrical cavity, the lower cylindrical cavity is washed, the alkaline liquid remaining in the lower cylindrical cavity is removed, and the acid dipping in the next step is prepared. Similarly, all the purified water generated in step S10 can flow into the lower cylindrical cavity, the lower cylindrical cavity is washed, the acidic liquid remaining in the lower cylindrical cavity is removed, and the acid dipping of the products in the next batch is prepared.

[0026] Also, between the upper cylindrical cavity and the lower cylindrical cavity, a position limiting table (preferably, an annular boss) for limiting the upward stroke of the second piston plate is installed.

[0027] By installing the position limiting table, when the second piston plate reaches the upper limit position, it is made to approach the lower end of the conveying auger. Therefore, when the conveying auger reverses, it is ensured that all the materials on the second piston plate can be conveyed from bottom to top by the conveying auger. At the same time, the position limiting table can prevent the members from being damaged when the second piston plate contacts the conveying auger.

[0028] Also, at the bottom of the side wall of the upper cylindrical cavity and above the position limiting table, a liquid discharge port is installed.

[0029] When the upper cylindrical cavity is used as a water storage cavity, the liquid discharge port can discharge the dipping liquid in the upper cylindrical cavity after the completion of the dipping process, or is used for the exchange of water liquid when dipping by the circulating water supply method during the dipping process.

[0030] Also, the first water passing hole and the second water passing hole are installed on different concentric circles respectively, so that it is possible to avoid causing water leakage of the partition plate group due to the first water passing hole and the second water passing hole overlapping on the horizontal projection plane.

[0031] Preferably, control valves for controlling the opening and closing are installed at the alkali liquid inlet, acid liquid inlet, acid liquid outlet, alkali liquid outlet, liquid outlet, and purified water outlet.

[0032] In addition, a packing made of a flexible sealing material (for example, rubber or silicon, etc.) is installed on the top surface of the first piston plate or the bottom surface of the second piston plate. The packing can enhance the sealing performance of the partition plate group.

[0033] In addition, an axial guide structure used to prevent the second piston plate from rotating along the circumferential direction is installed between the side wall of the upper cylindrical cavity and the second piston plate.

[0034] The axial guide structure is a prior art. Preferably, the axial guide structure includes a guide groove and a guide protrusion. The guide groove is installed on the side wall of the cylindrical body or the side surface of the second piston plate, and the guide protrusion is installed on the side surface of the second piston plate or the side wall of the upper cylindrical cavity and matches the guide groove.

[0035] In addition, a first screw portion is installed on the top surface of the first piston plate, and a second screw portion that engages with the first screw portion is installed on the bottom surface of the second piston plate.

[0036] By forcibly rotating the first piston plate in the forward direction with respect to the second piston plate, the first piston plate and the second piston plate are firmly adhered and fixedly connected by the first screw portion and the second screw portion. By forcibly rotating the first piston plate in the reverse direction with respect to the second piston plate, the first screw portion rotates in the reverse direction with respect to the second screw portion, and the first piston plate and the second piston plate are separated.

[0037] Note that the first screw portion is an internal screw hole, and the second screw portion is a male screw portion protruding downward, and vice versa.

[0038] In addition, the telescopic mechanism and the first piston plate are installed rotatably relative to the cylindrical main body, and further include a rotation mechanism. The rotation mechanism is connected to the telescopic mechanism and is used to drive the telescopic mechanism and the first piston plate to rotate.

[0039] Preferably, the main body of the telescopic mechanism is rotatably installed on the bottom plate of the cylindrical main body. The telescopic rod of the telescopic mechanism penetrates through the through hole on the bottom plate of the cylindrical main body and is fixedly connected to the first piston plate. The rotation mechanism includes a stepping motor, and the stepping motor is connected to the main body of the telescopic mechanism by a gear transmission pair.

[0040] The water supply pipeline is connected to a clean water source. The water pump is installed on the water supply pipeline and is used to inject clean water into the upper cylindrical cavity.

[0041] Furthermore, it further includes a color protection agent pipeline. One end of the color protection agent pipeline is connected to the annular intermediate layer cavity, and the other end is connected to a color protection agent supply source. On the color protection agent pipeline, there is installed a color protection agent pump body used to inject the color protection agent into the upper cylindrical cavity through the annular intermediate layer cavity and the nozzle holes, and perform color protection treatment on the olive fruits on the conveying auger.

[0042] In this application, color protection treatment may be performed on olive fruits using the spraying method. The bottom of the upper cylindrical cavity is blocked by a partition plate group, and the color protection agent is introduced into the upper cylindrical cavity. Color protection treatment may also be performed on olive fruits by the dipping method.

[0043] Furthermore, it further includes a steam pipeline. One end of the steam pipeline is connected to the annular intermediate layer cavity, and the other end is connected to a steam source. On the steam pipeline, there is installed a steam pump body used to inject steam into the upper cylindrical cavity through the annular intermediate layer cavity and the nozzle holes, and perform heat treatment on the olive fruits on the conveying auger to prevent discoloration.

[0044] The processing device according to the present application combines a plurality of processing steps into one. After the completion of one step, it is not necessary to expose the olive fruits to air, and they can be directly and quickly transferred to the next step, with high efficiency, and the color and quality of the olive fruits can be guaranteed.

[0045] The third aspect of the present application provides a method for processing olive fruits to maintain their green color based on the above-mentioned processing device. The method includes steps L10, L20, L30, and L40.

[0046] In L10, the first cleaning is performed. Specifically, the olive fruits are put into the cylindrical main body through the material inlet and outlet. The conveying motor drives the conveying auger to rotate forward (slowly), and the conveying auger conveys the olive fruits (slowly) downward. The water supply pump is turned on, and clean water is sprayed into the upper cylindrical cavity through the nozzle holes to wash the olive fruits on the conveying auger. The clean water flows into the lower cylindrical cavity through the first water passage holes on the first piston plate and is discharged through the clean water discharge port.

[0047] In L20, the deoleuropein of the olive fruits is carried out. Specifically, when the telescopic end of the telescopic mechanism extends, the first piston plate is driven to move upward to the top of the lower cylindrical cavity to receive the olive fruits input from the conveying auger.

[0048] As the conveying auger continues to put the olive fruits into the lower cylindrical cavity, the telescopic mechanism drives the first piston plate to move (slowly) downward. After all the olive fruits have fallen into the lower cylindrical cavity, the water supply pump is turned off, and all the clean water in the lower cylindrical cavity is discharged. Sodium hydroxide alkaline solution with a set concentration is put into the lower cylindrical cavity through the alkaline solution inlet, and the olive fruits are immersed for a set time.

[0049] At L30, the second cleaning is performed. Specifically, (before discharging the alkaline solution from the lower cylindrical cavity through the alkaline solution discharge port), as the telescopic end of the telescopic mechanism extends out for the second time, the first piston plate is driven to move upward (slowly), the olive fruits on the first piston plate come into contact with the lower end of the conveying auger, the conveying motor drives the conveying auger to rotate reversely (slowly), the conveying auger conveys the olive fruits (slowly) upward into the upper cylindrical cavity, the water supply pump is turned on for the second time, and purified water is sprayed into the upper cylindrical cavity through the nozzle holes to wash the olive fruits on the conveying auger, removing the alkaline solution on the surface of the olive fruits. The purified water passes through the first water passage holes on the first piston plate and flows into the lower cylindrical cavity, and is discharged from the purified water discharge port.

[0050] At L40, de-alkalization is performed. Specifically, the conveying motor drives the conveying auger to rotate forward (slowly), the conveying auger conveys the olive fruits (slowly) downward, the conveying auger continues to put the olive fruits into the lower cylindrical cavity, the telescopic mechanism drives the first piston plate to move downward (slowly), after all the olive fruits have fallen into the lower cylindrical cavity, the water supply pump is turned off, all the purified water in the lower cylindrical cavity is discharged, and an aqueous solution of organic acid citric acid is put into the lower cylindrical cavity through the acidic liquid inlet to immerse the olive fruits, performing a de-alkalization treatment on the olive fruits.

[0051] The olive fruit green color retention processing method further includes L50. In L50, a color protection and freshness retention treatment is performed. Specifically, when the telescopic end of the telescopic mechanism extends out for the third time, the first piston plate is driven to move upward (slowly), and the olive fruits on the first piston plate come into contact with the lower end of the conveying auger. The conveying motor drives the conveying auger to rotate (slowly) in the reverse direction. The conveying auger conveys the olive fruits (slowly) upward into the upper cylindrical cavity. Using the color protection agent pump body and the color protection agent pipeline, the color protection agent is sprayed into the upper cylindrical cavity through the nozzle holes, and the olive fruits on the conveying auger are sprayed to perform the color protection treatment.

[0052] The olive fruit green color retention processing method further includes L60. In L60, a heat treatment is carried out to prevent discoloration. Specifically, (turn off the color protection agent pump body), using the steam pump body and the steam pipeline, steam is sprayed into the upper cylindrical cavity through the nozzle holes, and sprayed onto the olive fruits on the conveying auger to carry out the heat treatment to prevent discoloration.

[0053] Also, the olive fruit green color retention processing method further includes L70. In L70, the conveying motor drives the conveying auger to rotate (slowly) in the reverse direction, and the conveying auger sends out the olive fruits from the cylindrical body through the material inlet and outlet.

[0054] The present invention combines a plurality of processing steps into one. After the end of one step, there is no need to expose the olive fruits to the air, and it can directly and quickly move to the next step, with high efficiency, and can guarantee the color and quality of the olive fruits.

Brief Description of the Drawings

[0055] To more clearly explain the specific embodiments of the present invention or the technical solutions of the prior art, the drawings necessary for the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention, and those skilled in the art can also obtain other drawings based on these drawings without creative labor.

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Modes for Carrying Out the Invention

[0056] Hereinafter, with reference to the drawings, the technical solutions of the present invention will be explained more clearly and completely. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the present invention.

[0057] Hereinafter, the present invention will be further interpreted and explained using specific embodiments.

[0058] <Example 1> As shown in Figure 1, this embodiment discloses an olive fruit green color retention processing method comprising the following steps.

[0059] In S10, the picked olive fruits are washed with purified water to perform the first cleaning (washing) to remove the dirt on the surface.

[0060] In S20, the olive fruits are immersed for a set time using a sodium hydroxide alkaline solution of a set concentration to perform deoleuropein removal of the olive fruits.

[0061] The olive varieties introduced into Yunnan Province are usually immersed in a 1.5% - 3% sodium hydroxide alkaline solution for 10 to 15 hours to remove bitterness. However, the bitterness removal technology of the present invention is shorter than the time required for deoleuropein removal of olive fruits in existing technical materials, the bitterness removal is complete, and the appearance can maintain a bright green color. For the bitterness removal technology of olive fruits of the same ripeness, the concentration of the alkaline solution can also be selected based on the glycoside content of the olive fruits. It is shown in the following table.

[0062] JPEG0007714715000001.jpg46170

[0063] In S30, the second cleaning is performed to wash the alkaline solution on the surface of the olive fruits with purified water.

[0064] In S40, the olive fruits are immersed using an aqueous solution of organic acid citric acid to perform dealkalization for dealkalizing the olive fruits.

[0065] After the olives are treated with alkali, the bitterness of the pulp disappears, but the taste of the alkali is very strong, so they are still not edible and need to be de-alkalized. Either purified water or acid can remove the taste of the alkali. Here, de-alkalization is carried out using an aqueous solution of 0.3% - 0.5% citric acid for food. When de-alkalizing, the fruits are cut (or the fruits are cut before the first cleaning or de-oleuropein), each fruit is cut 3 - 4 times, which is beneficial for the exchange of acidic and alkaline liquids, and the lemon juice needs to be changed every 4 hours. The alkali taste can be completely removed from the olive fruits in 24 hours, and the surface of the fruits will not turn black or the subsequent soup will not become turbid (due to incomplete de-alkalization), and there will also be no problem of poor flavor due to over-fermentation (processing in summer, the temperature is too high and it is easy to ferment).

[0066] In S50, a color protection freshness retention treatment for performing a color protection treatment on olive fruits using a color protection agent is carried out. The color protection agent contains 0.005% sodium copper chlorophyllin, 0.02% carotene powder, 0.03% lutein powder and 0.5% L calcium ascorbate. The immersion time of the color protection agent is 2 - 10 hours.

[0067] In S60, heat treatment is performed on the olive fruits after the color protection treatment to prevent discoloration (so-called blanching), the olive fruits whose discoloration is prevented are put into cans and sealed, and then sterilized.

[0068] The color protection method of the present application can keep the olive fruits after debittering and de-alkalization in a bright yellowish green color. Instead of the magnesium atom in the chlorophyll structure in the conventional green protection agent method, low reagents such as copper, zinc, and magnesium are used. The residue of copper in the green protection detection is 0.5 ppm, which is much lower than the national health standard requirement (10 ppm or less). In the canning of olive fruits, it is a very hygienic and safe method. In the present application, the combination of the color protection agent is used for immersion, and the subsequent hardening and brittleness retention processes are not required, the addition of the hardening agent is reduced, and the canned olives obtained will not become soft or lose their crunchiness even after high-temperature sterilization.

[0069] Also, the concentration of the aqueous solution of the organic acid citric acid is 0.3% - 0.5%.

[0070] For the canned olives after color protection and freshness retention, a comparison and evaluation are carried out. The results including the measurement of the components of the basic components and the sensory evaluation are shown in Tables 1 - 2.

[0071]

Table 1

[0072]

Table 2

[0073] The present invention has the following beneficial effects.

[0074] 1. It can realize the diversification of olive fruit products, expand the olive industrial chain. The obtained canned olives have a crude fat content of 15% - 20%, a protein content of 1.58% - 3.24%, a total amino acid content of 3.28% - 4.55%, a total carbohydrate content of 2.89 - 4.12%, a total polyphenol content of 0.1% - 0.3%, a flavonoid content of 0.1% - 0.28%. The longer the storage period, the more beneficial it is for the gradual release of the functional components of the human body, and it can fully exert the pharmacological effects of the effective physiological active components of olive fruits.

[0075] 2. The manufacturing process is simple, easy to operate, has a short production cycle, and can be easily operated at home, which is helpful for realizing industrial production, further promoting and improving the development of the olive industrial chain, increasing the added value of the product, and contributing to promoting the economic development of the olive cultivation areas in Yunnan Province.

[0076] <Example 2> As shown in FIGS. 2 to 6, the olive fruit green color retention processing apparatus according to this embodiment includes a cylindrical main body 10, a conveying auger 20, a conveying motor 1, a telescopic mechanism 2, and a water supply pump 3.

[0077] The cylindrical main body 10 is installed vertically. The interior of the cylindrical main body 10 is divided into an upper cylindrical cavity 11 and a lower cylindrical cavity 12. The conveying auger 20 is installed in the upper cylindrical cavity 11. A material inlet / outlet 13 is installed at the top of the side wall of the upper cylindrical cavity 11. The power transmission shaft of the conveying motor 1 is connected to the conveying auger 20 and is used to drive the conveying auger 20 to rotate. A plurality of nozzle holes 14 are installed on the cylindrical wall of the upper cylindrical cavity 11. One end of the water supply pump 3 is connected to a water supply source, and the other end communicates with the nozzle holes 14 through a water supply pipeline 3a. The nozzle holes 14 are used to spray purified water into the upper cylindrical cavity 11 to wash the materials on the conveying auger 20.

[0078] A first piston plate 31 that can slide up and down is installed in the lower cylindrical cavity 12.

[0079] The telescopic end of the telescopic mechanism 2 is connected to the first piston plate 31 and is used to drive the first piston plate 31 to move up and down. A plurality of first water passing holes 31a that communicate up and down are installed on the first piston plate 31.

[0080] An alkali liquid inlet 12a and an acid liquid inlet 12b that are used to respectively input alkali liquid and acid liquid into the lower cylindrical cavity 12 are installed on the side wall of the lower cylindrical cavity 12.

[0081] An acid liquid discharge port 12d, an alkali liquid discharge port 12c, and a purified water discharge port 12e that are used to respectively discharge alkali liquid, acid liquid, and purified water are installed at the bottom of the lower cylindrical cavity 12.

[0082] In this embodiment, the telescopic mechanism 2 is installed on the bottom plate of the cylindrical main body 10. The telescopic rod of the telescopic mechanism 2 passes through the through hole in the bottom plate of the cylindrical main body 10 and is fixedly connected to the first piston plate 31.

[0083] Preferably, the alkaline liquid inlet 12a and the acidic liquid inlet 12b are installed at the upper center of the side wall of the lower cylindrical cavity 12.

[0084] Also, the conveying motor 1 is installed at the top of the cylindrical main body 10. The telescopic mechanism 2 is installed at the bottom of the cylindrical main body 10.

[0085] Also, the conveying auger 20 includes a central shaft body 22 and spiral blades 21. The outer diameter of the spiral blades 21 matches the inner wall diameter of the cylindrical main body 10 (specifically, the upper cylindrical cavity 11) (specifically, the outer diameter of the spiral blades 21 is equal to or slightly smaller than the inner diameter of the cylindrical main body 10). A plurality of water permeable holes 21a are installed in the spiral blades 21, and the diameter of the water permeable holes 21a is smaller than the particle size of the olive fruits, so as to prevent the olive fruits from falling through the gap between the spiral blades 21 and the inner wall of the color protection cylinder and through the water permeable holes 21a.

[0086] Also, an annular intermediate layer cavity 11a is installed outside the side wall of the upper cylindrical cavity 11.

[0087] The inlet of the nozzle hole 14 is installed in the annular intermediate layer cavity 11a. The water supply pipeline 3a communicates with the nozzle hole 14 through the annular intermediate layer cavity 11a.

[0088] Above the first piston plate 31 and inside the lower cylindrical cavity 12, a second piston plate 32 is installed so as to be slidable up and down. The second piston plate 32 is provided with a second water passage hole 32a. In the horizontal projection plane, the first water passage hole 31a and the second water passage hole 32a are completely offset, and the first piston plate 31 and the second piston plate 32 are in close contact with each other up and down to form a partition plate group through which water does not pass, so that the upper cylindrical cavity 11 and the lower cylindrical cavity are relatively isolated, and it is possible to avoid the water liquid on the upper cylindrical cavity 11 from flowing into the lower cylindrical cavity 12. When the telescopic end of the telescopic mechanism 2 extends, the partition plate group is placed in the intermediate region between the upper cylindrical cavity 11 and the lower cylindrical cavity 12, and the upper cylindrical cavity 11 forms a water storage cavity for immersing olive fruits.

[0089] In the present application, by installing the second piston plate 32, the first piston plate 31 and the second piston plate 32 are in close contact with each other up and down to form the upper cylindrical cavity 11 into a water storage cavity, and further, it can be used in step S30 to perform dealkalization by the purified water immersion method.

[0090] Whether the spraying method or the immersion method is used, after the first piston plate 31 and the second piston plate 32 are separated, all the purified water generated in step S30 can flow into the lower cylindrical cavity 12, the lower cylindrical cavity 12 is washed, and the alkali liquid remaining in the lower cylindrical cavity 12 is removed to prepare for the acid immersion in the next step. Similarly, all the purified water generated in step S10 can flow into the lower cylindrical cavity 12, the lower cylindrical cavity 12 is washed, and the acidic liquid remaining in the lower cylindrical cavity 12 is removed to prepare for the alkali liquid immersion of the next batch of products.

[0091] Also, between the upper cylindrical cavity 11 and the lower cylindrical cavity 12, a position limiting base 16 (preferably, an annular boss) for limiting the upward stroke of the second piston plate 32 is installed.

[0092] When the telescopic end of the telescopic mechanism 2 extends upward, the first piston plate 31 and the second piston plate 32 move upward. After contacting the position limiting base 16, the telescopic end of the telescopic mechanism 2 forces the first piston plate 31 and the second piston plate 32 to be in close contact, thereby realizing the sealing of the partition plate group.

[0093] In addition, by installing the position limiting base 16, when the second piston plate 32 reaches the upper limit position, since the limit position approaches the lower end of the conveying auger 20, when the conveying auger 20 reverses, it is guaranteed that all the materials on the second piston plate 32 can be conveyed from bottom to top by the conveying auger 20. At the same time, the position limiting base 16 can prevent the members from being damaged when the second piston plate 32 contacts the conveying auger 20.

[0094] Also, a liquid discharge port 11b is installed at the bottom of the side wall of the upper cylindrical cavity 11 and above the position limiting base 16.

[0095] When the upper cylindrical cavity 11 is used as a water storage cavity, the liquid discharge port 11b can discharge the immersion liquid in the upper cylindrical cavity 11 after the completion of the immersion process, or is used for the circulation and exchange of the water liquid during the immersion process when immersing by the circulating water supply method.

[0096] As shown in FIG. 2, the first water through hole 31a and the second water through hole 32a are respectively installed in different concentric circles. The difference in the radii of two adjacent concentric circles (that is, the distance between them) is larger than the sum of the radii of the first water through hole 31a and the second water through hole 32a. Therefore, the first water through hole 31a and the second water through hole 32a do not overlap on the horizontal projection plane, avoiding causing water leakage in the partition plate group.

[0097] Preferably, control valves for controlling the opening and closing are installed at the alkali liquid inlet 12a, acid liquid inlet 12b, acid liquid discharge port 12d, alkali liquid discharge port 12c, liquid discharge port, and purified water discharge port 12e.

[0098] Note that a packing made of a flexible sealing material (such as rubber or silicon, etc.) is installed on the top surface of the first piston plate 31 or the bottom surface of the second piston plate 32. The sealing performance of the partition plate group can be enhanced by the packing.

[0099] In addition, an axial guide structure used to prevent the second piston plate 32 from rotating along the circumferential direction is installed between the side wall of the upper cylindrical cavity 11 and the second piston plate 32.

[0100] As shown in FIG. 3, the axial guide structure is a prior art. Preferably, the axial guide structure includes a guide groove 15 and a guide projection 32c. The guide groove 15 is installed on the side wall of the cylindrical body 10, and the guide projection 32c is installed on the side surface of the second piston plate 32 and matches the guide groove 15.

[0101] In addition, a first screw portion 31b is installed on the top surface of the first piston plate 31, and a second screw portion 32b that is screwed with the first screw portion 31b is installed on the bottom surface of the second piston plate 32. When the first piston plate 31 is forcibly rotated in the forward direction with respect to the second piston plate 32 so that the first screw portion 31b and the second screw portion 32b are firmly screwed together, the first piston plate 31 and the second piston plate 32 are firmly adhered and fixedly connected by the first screw portion 31b and the second screw portion 32b. When the first piston plate 31 is forcibly rotated in the reverse direction with respect to the second piston plate 32 so that the first screw portion 31b rotates and separates in the reverse direction with respect to the second screw portion 32b, the first piston plate 31 and the second piston plate 32 are separated.

[0102] In this embodiment, the first screw portion 31b is an internal screw hole, and the second screw portion 32b is a male screw portion protruding downward, and vice versa.

[0103] To achieve rotatably installing the first piston plate 31, this embodiment further includes a rotation mechanism 40, and the telescopic mechanism 2 and the first piston plate 31 are installed to be rotatable relative to the cylindrical main body 10. The rotation mechanism 40 is connected to the telescopic mechanism 2 and is used to drive the telescopic mechanism 2 and the first piston plate 31 to rotate.

[0104] Preferably, the rotation mechanism 40 includes a stepping motor 41, a mounting base 42, and a gear transmission pair. The mounting base 42 is rotatably installed at the bottom of the cylindrical main body 10. The main body of the telescopic mechanism 2 is fixed to the mounting base 42. The telescopic end of the telescopic mechanism 2 penetrates through the through holes on the mounting base 42 and the bottom plate of the cylindrical main body 10 and extends into the lower cylindrical cavity 12 and is fixedly connected to the first piston plate 31.

[0105] The stepping motor 41 is connected to the mounting base 42 by a gear transmission pair, and the gear transmission pair and the mounting base 42 drive the telescopic mechanism 2 and the first piston plate 31 to rotate in the forward or reverse direction, realizing that the first piston plate 31 and the second piston plate 32 are in close contact or separated. The gear transmission pair is a prior art. Preferably, it includes a driving gear 43 and an outer gear structure on the outer periphery of the mounting base 42, and the driving gear 43 is installed to cover the power output shaft of the stepping motor 41.

[0106] As shown in FIG. 6, after the first piston plate 31 and the second piston plate 32 rotate and are in close contact to form a sealing partition plate, then the telescopic mechanism 2 is used to synchronously drive the first piston plate 31 and the second piston plate 32 to move downward. Therefore, the volume of the upper cylindrical cavity 11 can be adjusted. When using the immersion mode, more immersion liquid (such as clean water or color protection agent, etc.) can be input to improve the immersion effect and efficiency.

[0107] More preferably, the present application may further include a color protection agent pipeline 11c. One end of the color protection agent pipeline 11c is connected to the annular intermediate layer cavity 11a, and the other end is connected to a color protection agent source. A color protection agent pump body (not shown) is installed in the color protection agent pipeline 11c for injecting the color protection agent into the upper cylindrical cavity 11 through the annular intermediate layer cavity 11a and the nozzle hole 14 to perform color protection treatment on the olive fruits on the conveying auger 20. Therefore, the present application may perform color protection treatment on olive fruits by using the spraying method, block the bottom of the upper cylindrical cavity 11 with a partition plate group, introduce the color protection agent into the upper cylindrical cavity 11, and perform color protection treatment on olive fruits by using the dipping method.

[0108] Also preferably, the present application may further include a steam pipeline 11d. One end of the steam pipeline 11d is connected to the annular intermediate layer cavity 11a, and the other end is connected to a steam source. A steam pump body (not shown) is installed in the steam pipeline 11d for injecting steam into the upper cylindrical cavity 11 through the annular intermediate layer cavity 11a and the nozzle hole 14 to perform heat treatment on the olive fruits on the conveying auger 20 to prevent discoloration.

[0109] The processing device according to the present application combines a plurality of processing steps into one. After the completion of one step, there is no need to expose the olive fruits to the air, and they can be directly and quickly transferred to the next step, with high efficiency and the ability to guarantee the color and quality of the olive fruits.

[0110] <Example 3> The third aspect of the present application provides a method for processing olive fruits to maintain their green color based on the above processing device. The processing method includes the following steps.

[0111] At L10, the first cleaning is performed. Specifically, olive fruits are fed into the cylindrical main body 10 through the material inlet / outlet 13. The conveying motor 1 drives the conveying auger 20 to rotate (slowly) clockwise, and the conveying auger 20 conveys the olive fruits (slowly) downward. The water supply pump 3 is turned on, and clean water is sprayed into the upper cylindrical cavity 11 through the nozzle holes 14 to wash the olive fruits on the conveying auger 20. The clean water flows into the lower cylindrical cavity through the first water passage holes 31a on the first piston plate 31 and is discharged through the clean water outlet 12e.

[0112] At L20, deoleuropein removal of the olive fruits is performed. Specifically, when the telescopic end of the telescopic mechanism 2 extends, the first piston plate 31 is driven to move upward to the top of the lower cylindrical cavity 12 to receive the olive fruits fed from the conveying auger 20.

[0113] As the conveying auger 20 continues to feed the olive fruits into the lower cylindrical cavity 12, the telescopic mechanism 2 drives the first piston plate 31 to move (slowly) downward. After all the olive fruits have fallen into the lower cylindrical cavity 12, the water supply pump 3 is turned off, and all the clean water in the lower cylindrical cavity 12 is discharged. Sodium hydroxide alkaline solution with a set concentration is fed into the lower cylindrical cavity 12 through the alkaline solution inlet 12a, and the olive fruits are immersed for a set time.

[0114] At L30, the second cleaning is performed. Specifically, the alkaline solution is discharged from the lower cylindrical cavity 12 through the alkaline solution discharge port 12c. As the telescopic end of the telescopic mechanism 2 extends out for the second time, the first piston plate 31 is driven to move upward (slowly), and the olive fruits on the first piston plate 31 come into contact with the lower end of the conveying auger 20. When reaching the upper limit position, the first piston plate 31 maintains a gap with the conveying auger 20. Since this gap is smaller than the particle size of the olive fruits, the purpose of conveying the olive fruits up and down is realized, and it is possible to avoid the first piston plate 31 directly contacting the lower end of the conveying auger 20.

[0115] The conveying motor 1 drives the conveying auger 20 to rotate reversely (slowly), and the conveying auger 20 conveys the olive fruits (slowly) upward into the upper cylindrical cavity 11. The water supply pump 3 is turned on for the second time, and purified water is sprayed into the upper cylindrical cavity 11 through the nozzle holes 14 to wash the olive fruits on the conveying auger 20 and remove the alkaline solution on the surface of the olive fruits. The purified water passes through the first water passage holes 31a on the first piston plate 31 and flows into the lower cylindrical cavity, and is discharged from the purified water discharge port 12e.

[0116] At L40, de-alkalization is performed. Specifically, the conveying motor 1 drives the conveying auger 20 to rotate forward (slowly), and the conveying auger 20 conveys the olive fruits (slowly) downward. The conveying auger 20 continues to put the olive fruits into the lower cylindrical cavity 12. The telescopic mechanism 2 drives the first piston plate 31 to move downward (slowly). The first piston plate 31 moves downward with the olive fruits after the second cleaning. After all the olive fruits have fallen into the lower cylindrical cavity 12, the water supply pump 3 is turned off, and all the purified water in the lower cylindrical cavity 12 is discharged. An organic acid citric acid aqueous solution is introduced into the lower cylindrical cavity 12 through the acidic liquid inlet 12b to immerse the olive fruits, and a de-alkalization treatment is performed on the olive fruits.

[0117] The olive fruit green color retention processing method further includes L50. In L50, a color protection and freshness retention treatment is performed. Specifically, when the telescopic end of the telescopic mechanism 2 extends out again, the first piston plate 31 is driven to move upward (slowly), and the olive fruits on the first piston plate 31 come into contact with the lower end of the conveying auger 20. The conveying motor 1 drives the conveying auger 20 to rotate (slowly) in the reverse direction. The conveying auger 20 conveys the olive fruits (slowly) upward into the upper cylindrical cavity 11. Using the color protection agent pump body and the color protection agent pipeline, the color protection agent is sprayed into the upper cylindrical cavity 11 through the nozzle holes 14, and the olive fruits on the conveying auger 20 are sprayed to perform the color protection treatment.

[0118] The olive fruit green color retention processing method further includes L60. In L60, a heat treatment is carried out to prevent discoloration. Specifically, the color protection agent pump body is turned off, and using the steam pump body and the steam pipeline, steam is sprayed into the upper cylindrical cavity 11 through the nozzle holes 14 and sprayed onto the olive fruits on the conveying auger 20 to carry out the heat treatment to prevent discoloration.

[0119] Also, the olive fruit green color retention processing method further includes L70. In L70, the conveying motor 1 drives the conveying auger 20 to rotate (slowly) in the reverse direction, and the conveying auger 20 sends out the olive fruits from the cylindrical main body 10 through the material inlet / outlet 13.

[0120] The present invention combines a plurality of processing steps into one. After the end of one step, there is no need to expose the olive fruits to the air, and they can be directly and quickly transferred to the next step, with high efficiency and the ability to guarantee the color and quality of the olive fruits.

[0121] Finally, it should be noted that each of the above-described embodiments is only used for explaining the technical solution of the present invention and does not limit the present invention. The present invention has been described in detail with reference to each of the above-described embodiments. Those skilled in the art can modify the technical solutions described in each of the above embodiments, or can equivalently replace some or all of the technical features. However, it should be understood that these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of each embodiment of the present invention.

Description of Reference Numerals

[0122] 1 Conveyor motor 2 Telescopic mechanism 3 Water supply pump 3a Water supply pipeline 10 Cylindrical body 11 Upper cylindrical cavity 11a Annular intermediate layer cavity 11b Liquid discharge port 11c Color protection agent pipeline 11d Steam pipeline 12 Lower cylindrical cavity 12a Alkali liquid inlet 12b Acid liquid inlet 12c Alkali liquid discharge port 12d Acid liquid discharge port 12e Purified water discharge port 13 Material inlet / outlet 12 Nozzle hole 15 Guide groove 16 Position limiting table 20 Conveyor auger 21 Helical blade 21a Water permeable hole 22 Central shaft body 31 First piston plate 31a First water passing plate 31b First screw part 32 Second piston plate 32a Second water passing plate 32b Second screw part 32c Guide protrusion 40 Rotation mechanism 41 Stepping motor 42 Mounting base 43 Driving gear

Claims

1. It comprises a cylindrical body, a conveying auger, a conveying motor, a telescopic mechanism, and a water supply pump. The cylindrical body is installed vertically, and the interior of the cylindrical body is divided into an upper cylindrical cavity and a lower cylindrical cavity. The conveying auger is installed in the upper cylindrical cavity, and a material inlet / outlet is installed at the top of the side wall of the upper cylindrical cavity. The power transmission shaft of the conveying motor is connected to the conveying auger and is used to drive the conveying auger to rotate. A plurality of nozzle holes are installed on the cylindrical wall of the upper cylindrical cavity. The water supply pump communicates with the nozzle holes through a water supply pipeline and is used to spray purified water into the upper cylindrical cavity through the nozzle holes to wash the materials on the conveying auger. [[ID=]]A first piston plate capable of sliding up and down is installed in the lower cylindrical cavity. The telescopic end of the telescopic mechanism is connected to the first piston plate and is used to drive the first piston plate to move up and down. A plurality of first water passage holes communicating up and down are provided on the first piston plate. An alkali liquid inlet and an acid liquid inlet used to respectively input alkali liquid and acid liquid into the lower cylindrical cavity are installed on the side wall of the lower cylindrical cavity. An acid liquid discharge port, an alkali liquid discharge port, and a purified water discharge port used to respectively discharge acid liquid, alkali liquid, and purified water are installed at the bottom of the lower cylindrical cavity. The conveying motor is installed at the top of the cylindrical body, and the telescopic mechanism is installed at the bottom of the cylindrical body. The conveying auger comprises a central axis body and spiral blades. The outer diameter of the spiral blades matches the inner wall diameter of the cylindrical body. A plurality of water permeable holes are provided on the spiral blades, and the diameter of the water permeable holes is smaller than the particle size of olive fruits to prevent the olive fruits from falling through the gaps between the spiral blades and the inner wall of the color protection cylinder and through the water permeable holes. A second piston plate is installed in the lower cylindrical cavity and above the first piston plate so as to be slidable up and down. Second water passage holes are provided on the second piston plate. The first water passage holes and the second water passage holes are completely offset. The first piston plate and the second piston plate form a partition plate group that does not allow water to pass through when they are in close contact up and down. When the telescopic end of the telescopic mechanism extends, the partition plate group is placed in the intermediate region between the upper cylindrical cavity and the lower cylindrical cavity. The upper cylindrical cavity forms a water storage cavity room for soaking olive fruits. An olive fruit green color retention processing device, characterized in that a position limiting platform for restricting the upward stroke of the second piston plate is installed in the middle between the upper cylindrical cavity and the lower cylindrical cavity. **Claim 2** An annular intermediate layer cavity is installed outside the side wall of the upper cylindrical cavity. The olive fruit green color retention processing device according to claim 1, characterized in that the inlet of the nozzle hole is installed in the annular intermediate layer cavity, and the water supply pipeline communicates with the nozzle hole through the annular intermediate layer cavity. **Claim 3** The olive fruit green color retention processing device according to claim 1, characterized in that the first water passing hole and the second water passing hole are installed on different concentric circles respectively, so that the first water passing hole and the second water passing hole overlap on the horizontal projection plane, thereby avoiding water leakage of the partition plate group. **Claim 4** The olive fruit green color retention processing device according to claim 1, characterized in that an axial guide structure is installed between the side wall of the upper cylindrical cavity and the second piston plate to prevent the second piston plate from rotating along the circumferential direction. **Claim 5** A first screw portion is installed on the top surface of the first piston plate, and a second screw portion that engages with the first screw portion is installed at the bottom of the second piston plate. The olive fruit green color retention processing device according to claim 1, characterized in that by forcibly rotating the first piston plate in the forward direction relative to the second piston plate, the first piston plate and the second piston plate are firmly adhered and fixedly connected by the first screw portion and the second screw portion. By forcibly rotating the first piston plate in the reverse direction relative to the second piston plate, the first screw portion rotates in the reverse direction relative to the second screw portion, and the first piston plate and the second piston plate are separated. **Claim 6** The telescopic mechanism and the first piston plate are installed rotatably relative to the cylindrical main body, and further include a rotation mechanism. The rotation mechanism is connected to the telescopic mechanism and is used to drive the telescopic mechanism and the first piston plate to rotate. The olive fruit green-holding processing device according to claim 1, characterized in that.

7. The main body of the telescopic mechanism is rotatably installed on the bottom plate of the cylindrical main body. The telescopic rod of the telescopic mechanism penetrates through the through hole on the bottom plate of the cylindrical main body and is fixedly connected to the first piston plate. The rotation mechanism includes a stepping motor, and the stepping motor is connected to the main body of the telescopic mechanism by a gear transmission pair. The olive fruit green-holding processing device according to claim 6, characterized in that.

8. It further includes a color protection agent pipeline. One end of the color protection agent pipeline is connected to the annular intermediate layer cavity, and the other end of the color protection agent pipeline is connected to a color protection agent supply source. On the color protection agent pipeline, there is installed a color protection agent pump body used to inject the color protection agent into the upper cylindrical cavity through the annular intermediate layer cavity and the nozzle holes, and perform color protection treatment on the olive fruits on the conveying auger. And / or, it further includes a steam pipeline. One end of the steam pipeline is connected to the annular intermediate layer cavity, and the other end of the steam pipeline is connected to a steam source. On the steam pipeline, there is installed a steam pump body used to inject steam into the upper cylindrical cavity through the annular intermediate layer cavity and the nozzle holes, and perform heat treatment on the olive fruits on the conveying auger to prevent discoloration. The olive fruit green-holding processing device according to claim 2, characterized in that.

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