JP5149374B2 - Grain expansion machine - Google Patents

Description

  The present invention relates to a grain expansion machine that expands grains such as unmilled rice, rice, corn, and beans by an extrusion method without using a special heating device, and in particular, heat generated inside the grain expansion machine. The present invention relates to a grain expansion machine that can effectively dissipate heat and can expand the grain without stopping operation due to overheating of the grain expansion machine.

  The grain expansion machine usually includes a container having a closed space, and grains such as unmilled rice, rice, corn, and beans are introduced together with air through the inlet of the container to increase the internal pressure of the container, and then It is a device that expands the grains in the container by opening the outlets all at once. The conventional grain expansion machine has a structure in which the grain put in the closed space is heated and cooked, and the internal pressure of the closed space is increased by the steam discharged from the cooked grain. In the raised state, the grain is extruded outward and expanded.

  However, in the conventional grain expansion machine, the grain is processed in a state of being heated at about 280 ° C. However, if the grain is heated at a temperature of 150 ° C. or more, there is a problem that the nutrient is destroyed. It is not very appropriate to use the conventional grain expansion machine as a device for producing good food.

  In addition, since the conventional grain expander needs to heat the grain using a special heating source, there is a problem in that energy efficiency is lowered. Further, the conventional grain expander has the special problem. There is a problem that the apparatus becomes complicated due to the heating source, and furthermore, since the heating degree of the grain is different in each grain processing process, a separate circuit is required to control the temperature of the conventional grain expander. There is also a problem that it must be added as an indispensable thing.

  Therefore, in order to solve the above-mentioned problems, the present invention can expand the grain without using a heating source, and effectively dissipate the heat generated at the time of expansion to prevent backflow of steam. And it aims at providing the grain expansion machine which enables continuous operation of the said grain expansion machine.

  In order to achieve the object of the present invention, according to an aspect of the present invention, there is provided a grain expander comprising:

  A motor, one end of which is connected to the motor and which conveys and compresses the grain while rotating; a first screw spiral formed in a predetermined direction on the outer peripheral surface of the screw; and a first screw on the outer peripheral surface of the screw A second screw spiral formed in the same direction as the first screw spiral, starting from the center of the first pitch of the first screw spiral, and formed at the other end of the screw; the first screw spiral and the second screw spiral; At least one thread connecting part for connecting threads forming a screw spiral, a screw groove formed at the other end of the screw and formed along a circumferential direction of the screw, and an outer peripheral surface of the screw A cylinder that compresses the grain together with the screw, heats the grain with the compression heat, and further gels the grain First and second cylinder spirals respectively formed on the inner peripheral surface of the cylinder corresponding to the first screw spiral and the second screw spiral; and a grain inlet unit formed at a motor end of the cylinder; An expander that rapidly ejects the grain in a gel state with the screw and the cylinder, including a first space portion that accommodates the other end of the screw, and the other end of the cylinder; A main body that contains a part of the screw and includes a second space part that is open on one side, a cover that is configured to open and close one side of the main body, and in which a grain outlet is formed; A grain expansion machine comprising: a expansion machine comprising a clamp for fixing the cover and the main body.

  Preferably, the inner diameter of the cylinder is reduced from the motor to the expander.

  Preferably, the inner diameter of the cylinder is formed such that the minimum inner diameter of the portion where the thread is formed is larger than the outer diameter of the screw thread of the screw.

  Preferably, the grain expanding machine further includes a cutter for cutting the grain discharged through the grain outlet of the cover to a predetermined length while rotating at a constant speed on the outer side of the cover.

Schematic explaining the grain expansion machine which concerns on one Embodiment of this invention. 1 is an exploded perspective view of the motor, screw, cylinder, and expander described in FIG. Cross section of FIG.

  The above and other objects and advantages of the present invention will become more apparent from the following description.

  Hereinafter, a grain expansion machine according to an embodiment of the present invention will be described with reference to the accompanying drawings.

  As shown in FIG. 1, the grain expander according to an embodiment of the present invention includes a motor 10, a screw 20, a cylinder 30, a expander 40, and a cutter 50.

  The motor 10 rotates the screw 20.

  When the screw 20 rotates according to the rotation of the motor 10, the grain (g1) is conveyed and compressed. In FIG. 1, reference numeral (g1) represents a grain that needs to be expanded or is in the expansion process, and reference numeral (g2) represents a grain that has been expanded.

  The first screw spiral 21 and the second screw spiral 22 are formed on the outer peripheral surface 20 of the screw in a predetermined direction, respectively.

  The second screw spiral 22 is formed in a spiral shape starting from the center of the first pitch of the first screw spiral 21 and is formed at the same pitch as the pitch of the first screw spiral 21. The pitch between the spiral 21 and the second screw spiral 22 is half of the pitch of the first screw spiral 21, and the screw 20 has a double spiral structure of the first screw spiral 21 and the second screw spiral 22. Have The reason why the screw 20 has a double spiral structure is that the reverse flow of heat when the grain (g1) is conveyed from one end of the screw 20 to the other end, that is, the heat from the other end of the screw 20 to the one end. This is to block the flow.

  At least one thread connecting portion 23 that connects the threads forming the first screw spiral 21 and the second screw spiral 22 is formed at the other end of the screw 20. As described with reference to FIG. 2, the pair of screw connection portions 23 are provided at an angle of about 180 ° so as to face each other on the outer peripheral surface of the screw 20, and the degree of compression of the grain (g1) is determined by the screw. The frictional heat due to the friction between the grain (g1) and the inner surfaces of the screw 20, the cylinder 30 and the expander 40 increases further at the other end of 20. Preferably, the grain (g1) needs to be compressed in a gel state, and the heat conductivity is increased at the other end of the screw 20 by the thread connection 23, so that the amount of heat generated by the expander 40 is increased. Or calorie | heat amount becomes still higher, As a result, the advantage that the optimal expansion temperature of the said grain (g1) can be maintained is acquired.

  A screw groove 24 is formed along the outer periphery of the screw spiral at the other end of the screw 20, that is, at the side surface of the thread coupling portion 23.

  The screw groove 24 is formed in the thread portion of the first screw spiral 21 and the second screw spiral 22 and also in the thread connection portion 23 between the first screw spiral 21 and the second screw spiral 22. The outer diameter of the screw groove 24 is preferably formed to be slightly smaller than the outer diameter of the thread valley portion of the screw 20.

  The cylinder 30 compresses the grain (g1) conveyed by the screw 20 so as to surround the outer peripheral surface of the screw 20, and causes the grain (g1) to self-heat by the compression action, thereby the grain (g1). ) To a gel state.

  A first cylinder helix 31 and a second cylinder helix 32 are respectively formed on the inner peripheral surface of the cylinder 30-corresponding to the first screw helix 21 and the second screw helix 22.

  The pitch of the first screw spiral 21 is equal to the pitch of the first cylinder spiral 31, and the pitch of the second screw spiral 22 is equal to the pitch of the second cylinder spiral 32.

  Since the grain inlet 33 is formed at one end of the cylinder 30, that is, at the end of the motor 10, the grain (g 1) is in a space formed by the screw 20 and the cylinder 30 through the grain inlet 33. It is thrown.

  Since the inner diameter of the cylinder 30 decreases from the motor 10 to the expander 40, the distances d1, d2, d3, and d4 between the screw spirals 21 and 22 and the cylinder spirals 31 and 32 are gradually decreased. . This means that d1 is greater than d2, d2 is greater than d3, and d3 is greater than d4.

  Here, the minimum inner diameter of the portion of the inner peripheral surface of the cylinder where the screw thread 30 is formed is larger than the outer diameter of the screw thread portion of the screw 20.

  The inflator 40 includes a main body 41, a cover 42 and a clamp 43.

  A first space portion 411 that accommodates the other end of the screw 20 and a second space portion 412 that accommodates the other end of the cylinder 30 and a part of the screw 20 are formed in the main body 41. The other end is open.

  The cover 42 closes the opening of the main body 41, and a grain outlet 421 for discharging the expanded grain is formed in the cover 42.

  The clamp 43 has a structure for clamping the main body 41 and the cover 42 and can be deformed to some extent by heat and pressure generated from the inside of the expander 40.

  The cutter 50 cuts the grain (g2) discharged through the grain outlet 421 of the cover 42 after the expansion. Specifically, the cutter 50 rotates at a given speed outside the cover 42 to cut the expanded grain (g2) into a desired size. Reference numeral 55 in FIG. 1 denotes a motor for rotating the cutter 50.

  Hereinafter, at the same time as the grain expansion process, the operation, function, and effect of each component of the grain expansion machine according to the embodiment of the present invention will be described in detail with reference to FIGS.

  In FIG. 1, a fixed amount of grain (g 1) per unit time is put into a space formed by the screw 20 and the cylinder 30 through a hopper “H” and a grain inlet 33 of the cylinder 30.

  When the grain (g1) is charged through the hopper “H” and the grain inlet 33 of the cylinder 30, the screw 20 is rotated by the motor 10 to move the grain (g1) to the expander 40. During the movement of the grain (g1) to the expander 40, the grain (g1) generates friction with each other, and the grain (g1) is applied to both the outer peripheral surface of the screw 20 and the inner peripheral surface of the cylinder 30. Friction is generated, resulting in frictional heat. As the grain (g1) moves from the grain inlet 33 to the expander 40, the grain (g1) becomes a gel state by the frictional heat, so that the water present inside the grain (g1) evaporates. The pressure in the space formed by the screw 20 and the cylinder 30 (hereinafter referred to as the expansion space) is increased.

  Grain (g1) continuously moves toward the expander 40 in a high temperature and high pressure state.

  In the meantime, if the grain (g1) is moved at a suitable temperature and pressure, an appropriate swelling can be obtained. The internal temperature and pressure of the expansion space are sensitive to the temperature of the input cereal, the moisture contained in the cereal, and the ambient temperature of the cereal expansion machine.

  In the present invention, it is necessary to maintain the temperature in the expansion space at about 130 ° C. This is because, as described above, when the temperature in the expanded space becomes 150 ° C. or higher, the nutrients of the grains are destroyed.

  When the temperature in the expansion space exceeds a predetermined temperature, the vapor evaporating from the grain (g1) flows backward and heats the grain (g1) to be introduced into the grain inlet 33, so that the grain (g1) is introduced. Gradually, the grain (g1) is in a gel state, and as a result, there is a problem that it becomes difficult to transport the grain (g1). Further, since the temperature of the grain is lower than the temperature of the expansion space, the grain expansion machine is cooled by the grain, and therefore, if the input grain is heated immediately, the cooling effect of the grain expansion machine by the grain cannot be expected. There is also a problem.

  A screw groove 24 is formed to prevent the backflow of steam, and the gel-like grain is annularly engaged with the screw groove 24, so that a kind of wall is formed to prevent the backflow of steam toward the grain inlet 33. To do.

  On the other hand, since the steam does not flow backward due to the grain filled in the screw groove 24, the steam in the expansion space is discharged through the grain inlet 421. Here, when the vapor pressure in the expansion space is very high, the temperature in the expansion space rises, and as a result, the expansion efficiency is affected. Therefore, the vapor pressure in the expansion space has a predetermined pressure. In the case of exceeding the above, it is necessary to discharge the steam through a route other than the grain outlet 421.

  Therefore, the expander 40 includes the main body 41, the cover 42, and the clamp 43. As described above, the main body 41 and the cover 42 are fixed by the clamp 43, and the clamp 43 is a machine. When the vapor pressure in the expansion space exceeds a predetermined pressure, the vapor passes through a fine gap between the main body 41 and the cover 42 due to the vapor pressure. Discharged.

  With this configuration, the temperature and pressure in the expansion space are kept constant.

  The grain (g1) conveyed toward the cover 42 through the expanded space is discharged through the grain outlet 421. Here, since the atmospheric pressure is smaller than the pressure in the expansion space, the expansion space expands.

  On the other hand, since the inner peripheral surface of the cylinder 30 is gradually reduced in the length direction, the expansion space is gradually reduced during the conveyance of the grain (g1). The friction increases further, and the self-heating effect increases as the grain (g1) is conveyed toward the expander 40.

  When the expanded grain (g2) is discharged through the grain outlet 421, the expanded grain (g2) is cut into a desired size, the cut grain (g2) is packaged, and the expanded grain ( It should be easy to commercialize g2).

  Therefore, the cutter 50 is rotated by the motor 55 for the cutter 50 in order to cut the expanded grain (g2) into a desired size.

  As described above, the grain expansion machine having a structure in which the inner diameter of the cylinder according to an embodiment of the present invention gradually decreases has been described. However, the object of the present invention can be achieved even if the inner diameters of the cylinders are equal. Therefore, it will be apparent to those skilled in the art that such modifications and variations should be included in the technical considerations of the present invention.

  As described above, the grain expansion machine having the cutter according to an embodiment of the present invention has been described. However, the object of the present invention can be achieved even if the grain expansion machine does not include the cutter. Thus, it will be apparent to those skilled in the art that such modifications and variations should be included in the technical considerations of the present invention even when the grain expander does not include a cutter. .

  As described above, the grain expansion machine according to the preferred embodiment of the present invention has been described. However, the present invention is not limited to the above embodiment, and those skilled in the art will depart from the true spirit of the present invention. Various modifications and variations of the grain expander can be made without doing so.

  As described above, the present invention can expand grain without using a heating source, effectively dissipates heat generated during expansion to prevent backflow of steam, and continuous operation of the grain expander. Providing a grain expansion machine.

  As described above, the grain expansion machine according to the present invention expands grains such as unmilled rice, rice, corn, and beans by an extrusion method without using a special heating device, and inside the grain expansion machine. By effectively radiating the generated heat, the grain can be expanded without stopping its operation due to overheating of the grain expansion machine.

Claims (4)

A motor,
One end of which is connected to the motor and rotates and conveys and compresses the grain,
A first screw spiral formed in a predetermined direction on the outer peripheral surface of the screw;
A second screw helix formed in the same direction as the first screw helix, starting from the center of the first pitch of the first screw helix on the outer peripheral surface of the screw;
A screw thread connecting portion formed on the other end of the screw and connecting a screw thread forming the first screw spiral and the second screw spiral;
A screw groove formed at the other end of the screw and formed along a circumferential direction of the screw;
A cylinder surrounding the outer peripheral surface of the screw, compressing the grain together with the screw, heating the grain with the compression heat, and further bringing the grain into a gel state;
First and second cylinder spirals respectively formed on an inner peripheral surface of the cylinder corresponding to the first screw spiral and the second screw spiral;
A grain inlet unit formed at the motor end of the cylinder;
An expander that rapidly ejects the grain in a gel state with the screw and the cylinder, the first expander containing the other end of the screw, and the other end of the cylinder and the A body containing a part of the screw and including a second space portion that is open on one side, a cover configured to open and close one side of the body, and having a grain outlet formed thereon; A grain expansion machine comprising: an expansion machine comprising a cover and a clamp for fixing the main body.   The grain expander according to claim 1, wherein an inner diameter of the cylinder decreases from a side surface of the motor to the expander.   3. The grain expansion machine according to claim 2, wherein a minimum inner diameter of a portion of the inner peripheral surface of the cylinder where the thread is formed is larger than an outer diameter of the screw thread of the screw.   4. The grain expansion machine according to claim 3, further comprising a cutter for cutting the grain discharged through the grain outlet of the cover into a predetermined length while rotating at a constant speed in the outer portion of the cover. .