Cutting type dry rice washing machine

Abstract

The cutting-type dry rice washer according to the present invention includes a hopper (220) into which polished rice is introduced, a transfer screw (260) for transferring the polished rice introduced from the hopper (220), and a no-wash rice processing unit (280) for finely cutting the surface of the polished rice transferred from the transfer screw (260) and separating and removing residual rice bran adhering to the surface of the polished rice, The device is expected to provide a cutting-type dry rice washer that can reliably remove residual rice bran while maintaining an appropriate amount of surface cutting of the white rice during the no-wash rice processing process, and prevent white rice fed into the previous and subsequent no-wash rice processing processes from mixing, thereby improving the quality of the processed no-wash rice.It is also expected to provide a cutting-type dry rice washer that can increase the efficiency of no-wash rice processing by simplifying the equipment configuration as it does not use abrasives or adsorbents.

Description

Technical Field

[0001] The present invention relates to a rice washer that processes regular polished rice into pre-washed rice, and more particularly to a cutting-type dry rice washer that processes polished rice into pre-washed rice by smoothing the surface of polished rice with a metal mesh coupled to a cutting roller, and using air pressure to separate residual rice bran adhering to the surface of polished rice and discharge the same to the outside. Background Art

[0002] Currently, the rice milling method used in comprehensive grain processing plants comprises arranging a grinding-type rice mill and a friction-type rice mill in a tandem arrangement to process rice into polished rice, then removing rice bran remaining in the polished rice with a rice polishing machine after a sorting step. However, this method cannot completely remove residual rice bran on the surface of polished rice, thus causing problems such as reduced storage stability of polished rice, deteriorated taste, the inconvenience for consumers to wash rice multiple times before cooking, and environmental pollution caused by rice washing wastewater.

[0003] To solve these problems, pre-washed rice has been increasingly popularized, and the popularization of pre-washed rice processing machinery has accordingly expanded.

[0004] In this regard, Korean Patent Laid-Open Publication No. 10-2000-0017015, published on March 25, 2000, entitled "Apparatus and Method for Producing Cleaned Rice" discloses an apparatus for producing cleaned rice as a dry-type cleaned rice production apparatus capable of obtaining cleaned rice that does not require rice polishing operations such as rice washing before cooking, wherein the apparatus uses a cleaning material made of a fibrous material that absorbs or adsorbs oil and fat, and a pressure material that cleans raw milled rice via the cleaning material. However, this apparatus comprises a dispersing section, a stirring section, a wind separation section and the like that filter and sort milled rice, the pressure material and the cleaning material with a sorting device, discharge cleaned rice and remove fine powder such as rice bran adhering to rice grains, thus having a complicated structure, additionally requiring the cleaning material and the pressure material, and therefore has problems such as difficult maintenance and increased costs.

[0005] On the other hand, Registered Patent Publication No. 10-1105968 of the Republic of Korea (published January 17, 2012), "Method for Manufacturing Wash-Free Rice and Apparatus Thereof," discloses an apparatus for manufacturing wash-free rice, characterized by comprising a stirring device (1) for peeling the bran layer from polished rice and a separation device (6) for separating the polished rice and bran layer peeled off by the stirring device (1). This apparatus removes the bran from the polished rice by repeatedly rubbing the polished rice against a hard object to cause the bran layer remaining on the polished rice to adhere to the hard object, and then rubbing the bran layer attached to the hard object against a group of polished rice to peel it off from the hard object. However, this method has problems such as low production efficiency for wash-free rice, a complex configuration due to the independent provision of the stirring device and separation device, and difficulty in manufacturing and maintenance. [Overview of the project] [Problems that the invention aims to solve]

[0006] The present invention aims to solve the above-mentioned problems and to provide a cutting-type dry rice washing machine that does not require mediating materials such as abrasives and adsorbents, has a simple equipment configuration, and improves the processing efficiency of pre-washed rice. [Means for solving the problem]

[0007] The cutting-type dry rice washing machine according to the present invention has the following features.

[0008] The cutting-type dry rice washing machine according to the present invention is a cutting-type dry rice washing machine that includes a rice input hopper (220) into which polished rice is fed, a transfer screw (260) for transferring the polished rice fed from the rice input hopper (220), and a rinse-free rice processing unit (280) for removing residual rice bran adhering to the surface of the polished rice transferred from the transfer screw (260). The aforementioned pre-washed rice processing unit (280) includes a cutting roller (160) and a wire mesh (180), The cutting roller (160) is A support shaft (110) is connected to the joint of the drive shaft (250); A number of cutting rings (120) and spacing rings (130) are alternately inserted into the outer circumferential surface of the support shaft (110); A fastening member (150) is fastened to the end of the support shaft (110) to prevent the cutting ring (120) and the spacing ring (130) from falling off; The present invention is characterized by including a transport guide (140) attached to the surface of a cylindrical member formed by inserting the cutting ring (120) and the spacing ring (130) into the outer circumferential surface of the support shaft (110), such that it has a predetermined inclination angle with respect to the axial direction of the cylindrical member.

[0009] The transport guidance guide (140) is characterized by joining a metal member having a length that covers the entire length of the cylindrical member by welding.

[0010] The transport guide (140) is formed by creating a groove on the surface of the cylindrical member and joining the metal member in the groove, characterized in that the outer surface of the joined metal member protrudes outward from the upper surface of the cutting teeth (123) of the cutting ring (120) and does not come into contact with the inner circumferential surface of the wire mesh (180).

[0011] The transport guidance guides (140) are characterized in that one is placed at each of the cylindrical members at opposing positions in the diametrical direction, and a total of two or four are installed.

[0012] The cutting passage (122) formed between the cutting teeth (123) of the cutting ring (120) is characterized by being formed in an arc shape.

[0013] The aforementioned spacing ring (130) is characterized in that a large number of rotational guide vanes (133) are formed at equal intervals along the circumferential direction across its entire outer surface.

[0014] The wire mesh (180) includes a single-stage wire mesh (181) and a double-stage wire mesh (182), wherein the outer circumferential surface of the single-stage wire mesh (181) has numerous slit-type through holes, and the inner circumferential surface of the single-stage wire mesh (181) has multiple cutting guides (183) attached at equal intervals along the circumferential direction, and the outer circumferential surface of the double-stage wire mesh (182) has numerous circular through holes, and the lengths of the single-stage wire mesh (181) and the double-stage wire mesh (182) are formed in a ratio of 1:2 to 1:4.

[0015] The aforementioned single-stage wire mesh (181) and double-stage wire mesh (182) are characterized by being formed as a single unit or being detachably joined together. [Effects of the Invention]

[0016] The cutting-type dry rice washing machine according to the present invention processes polished rice to produce pre-washed rice without using mediating materials such as abrasives and adsorbents. Therefore, it is expected to reduce operating and maintenance costs, eliminate the need for mixing, stirring, and separating mediating materials, simplify the configuration and production process, reduce manufacturing costs, and improve processing efficiency.

[0017] Furthermore, since the cutting passage (122) of the cutting ring (120) of the present invention is configured in an arc shape, the transfer of polished rice within the pre-washed rice processing unit (280) becomes smoother, so the surface of the polished rice is cut uniformly, and it is expected that the quality of the pre-washed rice will be improved.

[0018] Furthermore, by forming numerous rotating guide blades (133) on the outer surface of the spacing ring (130), the transfer of rice is promoted, and the transfer guide (140) promotes the separation of residual rice bran. As a result, the transfer of rice becomes smoother, improving the efficiency of pre-washed rice processing, and at the end of the pre-washed rice processing work, no polished rice remains in the pre-washed rice processing unit (280) and is completely discharged. [Brief explanation of the drawing]

[0019] [Figure 1] This is a block diagram showing the configuration of a conventional clean rice production apparatus and production method. [Figure 2]It is a partial cross-sectional view of the front of an unwashed rice production apparatus in the prior art. [Figure 3] It is a schematic cross-sectional view showing the configuration of a cutting-type dry rice washing machine according to the present invention. [Figure 4] It is an exploded perspective view of a non-washed rice processing unit according to the first embodiment of the present invention. [Figure 5] It is a front view of a cutting ring according to the present invention. [Figure 6] It is a front view of a spacing ring according to the present invention. [Figure 7] It is an exploded perspective view of a non-washed rice processing unit according to the second embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] Hereinafter, a cutting-type dry rice washing machine according to a preferred embodiment of the present invention will be described in detail with reference to the drawings.

[0021] Hereinafter, descriptions of conventional well-known matters will be omitted or briefly stated in order to clarify the gist of the present invention.

[0022] As shown in Fig. 3, the cutting-type dry rice washing machine according to the present invention comprises: a main body housing (210) forming the outer shape of the rice washing machine (200); a non-washed rice processing unit (280) installed inside the main body housing (210) for processing polished rice into non-washed rice; a polished rice feeding hopper (220) arranged on the upper side of the main body housing (210) for feeding polished rice into the main body housing (210); a transfer screw (260) for transferring polished rice supplied from the polished rice feeding hopper (220) to one end of the non-washed rice processing unit (280); a hollow drive shaft (250) for supplying driving force to the transfer screw (260); a non-washed rice discharge port (230) formed at the other end of the non-washed rice processing unit (280) for discharging non-washed rice; a rice bran discharge port (240) formed in the lower main body housing (210) of the non-washed rice processing unit (280) for discharging rice bran and air; and a blower (not shown) for supplying external air from the outer end of the drive shaft (250) into the hollow portion of the drive shaft (250).

[0023] The drive shaft (250) is a substantially hollow cylindrical member, and its outer surface is formed in the order of a drive unit, a transfer screw (260), and a coupling unit from one end (the end connected to the blower) to the other end (the end opposite to the one end). The one end is installed so as to be exposed to the outside through a through hole formed on one side of the main body housing (210), and an electric pulley (270) for supplying power from the outside is mounted on the outer surface of the drive unit. Bearings (290) are installed on both sides of the electric pulley (270) to rotatably support the drive shaft (250). When power is supplied from the outside through the electric pulley (270), the drive shaft (250) rotates, and the transfer screw (260) rotates as a result.

[0024] The transfer screw (260) extends from the lower side of the white rice input hopper (220) to one end of the rinse-free rice processing unit (280), and is a component that transfers the input white rice to the rinse-free rice processing unit (280). A helical transfer blade is formed on the outer circumferential surface of the hollow cylindrical member, and the transfer screw (260) is inserted into and fixed to the outer circumferential surface of the drive shaft (250).

[0025] Furthermore, the connecting portion is formed by extending from the end of the transfer screw (260), and a plurality of air supply holes for releasing air to the outside from the hollow portion are formed by penetrating the side wall. The other end is sealed to prevent air from leaking out.

[0026] As shown in Figure 4, the pre-washed rice processing unit (280) is composed of a cutting roller (160) and a wire mesh (180). The cutting roller (160) is composed of a support shaft (110) inserted into the outer circumferential surface of a joint formed at the other end of the drive shaft (250), a number of cutting rings (120) and spacing rings (130) alternately inserted around the outer circumference of the support shaft (110), a transport guide (140) installed diagonally across the number of cutting rings (120) and spacing rings (130) coupled to the support shaft (110), and a fastening member (150) coupled to the end of the support shaft (110) to prevent the cutting rings (120) or spacing rings (130) from falling off.

[0027] The support shaft (110) is a hollow cylindrical metal member, and as shown in Figure 4, a support flange (115) is formed at one end thereof to support the cutting ring (120) and spacing ring (130) which are inserted around the outer circumference of the support shaft (110). A male threaded portion (116) is formed on the outer surface of the other end, and fastens with the female threaded portion (151) of the fastening member (150). Three to six rows of air supply holes (114) are formed at equal intervals along the circumference on the side wall of the support shaft (110), and these air supply holes are formed to be long along the axial direction of the support shaft (110). Each row consists of two to three through holes, and is formed so as to match the position, shape, dimensions, and number of air supply holes formed at the joint of the drive shaft (250). By inserting the support shaft (110) into the joint and connecting it so that the air supply hole (114) and the air supply hole of the joint are aligned, external air supplied through the hollow portion of the drive shaft (250) is ejected, blowing away and removing the rice bran adhering to the surface of the polished rice.

[0028] As shown in Figures 4 and 5, the cutting ring (120) is an annular member formed by processing a metal plate member, and a circular support shaft insertion hole (121) is formed on its inner side. Multiple keyway coupling protrusions (124) are formed on the inner surface of the support shaft insertion hole (121) at equal intervals.

[0029] Furthermore, numerous cutting teeth (123) are formed at equal intervals along the circumferential direction on the entire outer surface of the cutting ring (120), and cutting passages (122) are formed between the cutting teeth (123). If the root portions of the cutting teeth (123) are formed with sharp angles, the flow of polished rice during processing will not be smooth, leading to uneven friction and processing pressure, which may increase the proportion of broken and shattered rice. Therefore, the cutting passages (122) are formed in an arc shape.

[0030] The cutting ring (120) is made of high-carbon steel or stainless steel, which has excellent hardness, strength, and wear resistance, and has a thickness of 5 mm. The outer diameter is determined considering the rotational speed of the drive shaft (250), but is configured so that the circumferential speed of the outer surface of the cutting ring (120) is 4.0 to 4.6 m / s. This value was calculated through experiments that took into account quality indicators such as the whiteness, turbidity, and percentage of broken rice in the pre-washed rice produced.

[0031] As shown in Figures 4 and 6, the spacing ring (130) is an annular member formed by processing a metal plate member, and a circular support shaft insertion hole (131) is formed on its inner side. In addition, a plurality of keyway coupling protrusions (134) are formed on the inner surface of the support shaft insertion hole (131) at equal intervals.

[0032] Furthermore, a notch (132) is formed by cutting out and removing a portion of the annular member, and numerous rotating guide blades (133) are formed at equal intervals along the circumference on the entire outer surface of the spacing ring (130). This configuration prevents the polished rice from sliding on the outer surface of the spacing ring (130) during processing and facilitates its flow.

[0033] The thickness of the aforementioned spacing ring (130) is 5 to 11 mm, and its outer diameter and material are the same as those of the aforementioned cutting ring (120).

[0034] Then, the cutting ring (120) or spacing ring (130) is inserted so that one side is in contact with the support flange (115) of the support shaft (110), and the keyway coupling projections (124, 134) are coupled to the outer keyway (112) of the support shaft (110). After that, the cutting ring (120) and spacing ring (130) are inserted in the same manner, but the cutting ring (120) and spacing ring (130) are inserted alternately, and after filling up to the male threaded portion (116) of the support shaft (110), the female threaded portion (151) of the fastening member (150) is fastened to the male threaded portion (116).

[0035] Furthermore, a transfer guide (140) is attached by welding to the outer circumferential surface of the cylindrical shape formed by inserting the cutting ring (120) and the spacing ring (130) into the support shaft (110). The guide is made of a metal member that is positioned at an inclination angle of 0° to 20° with respect to the axial direction of the cylinder and has a length that covers the entire length of the cylindrical member. If the inclination angle is 10° or more, the transfer guide (140) may be divided into two and separated so that they have the same inclination angle. The transfer guide (140) not only facilitates the transfer of polished rice but also comes into contact with the polished rice during transfer to remove residual rice bran from the surface of the polished rice.

[0036] Furthermore, grooves are formed in advance at the locations where the transport guide (140) is to be installed, and the transport guide (140) is installed with a portion of it inserted into these grooves. The outer surface of the installed transport guide (140) is configured to protrude above the upper surface of the cutting teeth (123) of the cutting ring (120), and not to come into contact with the inner surface of the wire mesh (180). By installing one transport guide (140) at each of the cylindrical member's opposing positions in the diametrical direction, a total of two or four transport guides (140) are installed, completing the cutting roller (160).

[0037] At this time, 4 to 8 keyway coupling protrusions (124, 134) of the cutting ring (120) and spacing ring (130) are formed at equal intervals along the inner circumferential surfaces of the cutting ring (120) and spacing ring (130). With the cutting ring (120) and spacing ring (130) inserted into the support shaft (110), the outer circumferential surface of the support shaft (110) and the inner circumferential surfaces of the cutting ring (120) and spacing ring (130) form concentric circles with each other. The keyway coupling protrusions (124, 134) of the cutting ring (120) and spacing ring (130) are formed higher than the depth of the outer keyway (112) of the support shaft (110), and air passages (125, 135) are formed between the outer circumferential surface of the support shaft (110) and the inner circumferential surfaces of the cutting ring (120) and spacing ring (130). External air ejected through the air supply hole (114) of the support shaft (110) flows through these air passages (125, 135) and is discharged through the notch (132) of the spacing ring (130).

[0038] The wire mesh (180) is a hollow cylindrical metal member as shown in Figure 4, and is formed in the order of a first-stage wire mesh (181), a second-stage wire mesh (182), and a connecting flange (186) from one side (the transfer screw (260) side).

[0039] The aforementioned single-stage wire mesh (181) is made by forming slit-type through-holes with a width of 1.1 mm and a length of 15 mm in the portion of a metal sheet material such as stainless steel with a thickness of 1.2 mm, excluding both ends, so as not to allow rice grains to pass through, setting the spacing between adjacent slit-type through-holes to 1.5 to 3.0 mm, and then rolling it up to form a cylindrical shape. Multiple cutting guides (183) are installed on the inner surface at equal intervals along the circumferential direction of the cylindrical shape, and 4 to 8 reinforcing ribs covering the entire length can be attached to the outer surface at equal intervals along the circumferential direction.

[0040] The slit-type through-holes are arranged at a 20° inclination with respect to the axial direction of the wire mesh (180). The narrower the spacing between adjacent slit-type through-holes, the greater the amount of material removed, so adjustments must be made to prevent excessive processing of the polished rice.

[0041] The cutting guide (183) is a component that works in conjunction with the cutting roller (160) to finely scrape the surface of the white rice that is fed in, smoothing the surface and improving the cutting efficiency of the white rice. The cutting guide (183) is attached to the inner surface of the wire mesh (180) by welding 4 to 8 strips of steel plate, each 0.7 to 1.2 mm thick and 8 to 12 mm wide, to the inner surface of the wire mesh (180) so that it is positioned at an inclination angle of 0 to 20° with respect to the axial direction of the wire mesh (180). The length of the cutting guide (183) is configured to cover the entire length of the single-stage wire mesh (181).

[0042] The two-tiered wire mesh (182) is formed by creating numerous circular through-holes with a diameter too small for rice grains to pass through at equal intervals along two diagonal directions in the portion of a metal plate excluding both ends, and then rolling it into a cylindrical shape. Circular reinforcing ribs (185) are attached to the outer surface at predetermined intervals along the length, and rod-shaped reinforcing ribs are also attached at predetermined intervals in the circumferential direction. The connecting flange (186) is constructed by forming through-holes for connecting the wire mesh (180) to the frame inside the main housing (210) with bolts and nuts.

[0043] The material, thickness, and outer diameter of the two-stage wire mesh (182) are the same as those of the one-stage wire mesh (181). However, the lengths of the one-stage wire mesh (181) and the two-stage wire mesh (182) are formed in a ratio of 1:2 to 1:4. The one-stage wire mesh (181) is configured to finely scrape the surface of the polished rice, and the two-stage wire mesh (182) is configured to rub the polished rice with its inner surface to separate the residual rice bran adhering to the surface of the polished rice. Therefore, as described above, the length of the two-stage wire mesh (182) is made relatively longer.

[0044] The wire mesh (180) is formed by attaching a reinforcing material to one end of the single-layer wire mesh (181) by welding or other means, and joining the other end of the single-layer wire mesh (181) with the end of the opposing double-layer wire mesh (182) by welding.

[0045] On the other hand, in a second embodiment of the present invention, as shown in Figure 7, the boundary portion (184) of the wire mesh (180) is not formed by welding, but flanges with connecting through holes are provided at the portions where the first-stage wire mesh (181) and the second-stage wire mesh (182) face each other, and the two are joined together with bolts and nuts.

[0046] This is because the cutting guide (183) attached to the inner surface of the first-stage wire mesh (181) wears out relatively quickly, so by making only the first-stage wire mesh (181) replaceable, the maintenance costs of the equipment can be reduced. In this case, the other components of the wire mesh (180) are the same as in the first embodiment.

[0047] The installation process and effects of the aforementioned pre-washed rice processing unit (280) are as follows.

[0048] First, the cutting roller (160) is inserted into the outer surface of a coupling portion formed on the outer surface of the drive shaft (250), or in contact with the end of a transfer screw (260) which is manufactured separately as a component and coupled to the outer surface of the drive shaft (250). After adjusting the inner keyway (113) formed on the support shaft (110) of the cutting roller (160) to match the keyway formed on the outer surface of the coupling portion, a key is inserted to connect them.

[0049] Subsequently, the wire mesh (180) is positioned so that the cutting roller (160) is inserted into the hollow portion of the wire mesh (180), and the connecting flange (186) of the wire mesh (180) is connected to the frame inside the main housing (210) using bolts and nuts, thereby installing the pre-washed rice processing unit (280). At this time, the outer circumferential surface of the cutting roller (160) and the inner circumferential surface of the wire mesh (180) form concentric circles with each other.

[0050] The processing of pre-washed rice using the cutting-type dry rice washing machine, including the pre-washed rice processing unit (280), proceeds as follows.

[0051] First, if the drive shaft (250) is driven with white rice already loaded into the white rice loading hopper (220), or if the drive shaft (250) is driven first and then the white rice is loaded into the white rice loading hopper (220), the loaded white rice is transported by the transfer screw (260) and flows into the space between the outer surface of the cutting roller (160) and the inner surface of the wire mesh (180) of the rinse-free rice processing unit (280).

[0052] The incoming polished rice is rotated by the cutting teeth (123) of the cutting ring (120) and the rotation guide vanes (133) of the spacing ring (130), its transfer is facilitated by the transfer guide (140), and it is discharged through the first-stage wire mesh (181) and the second-stage wire mesh (182) to the polished rice discharge port (230).

[0053] At this time, as the polished rice passes through the first-stage wire mesh (181), its surface is finely shaved by the action of the cutting teeth (123) and the cutting guide (183), resulting in a smooth surface. Then, as the polished rice passes through the second-stage wire mesh (182), it is pressed against the cutting teeth (123), rubbed against the inner surface of the second-stage wire mesh (182), and comes into contact with the transport guide (140), separating any remaining rice bran from the surface of the polished rice.

[0054] Meanwhile, external air with a wind speed of 25-45 m / s flows into the hollow portion of the drive shaft (250) from a blower (not shown). The external air is discharged through the air supply hole of the joint and the air supply hole (114) of the support shaft (110) via the hollow portion, flows through the supply passages (125, 135), and is ejected through the notch (132) of the spacing ring (130). As a result, residual rice bran separated from the polished rice being transported along the inner surface of the wire mesh (180) is ejected to the outside of the rinse-free rice processing unit (280) through the slit-type through holes or circular through holes formed in the wire mesh (180).

[0055] As described above, the rice bran ejected to the outside of the pre-washed rice processing unit (280) is discharged to the outside of the rice washing machine (200) along with air through the rice bran discharge port (240) formed at the bottom of the main housing (210).

[0056] On the other hand, by further equipping the rice bran discharge port (240) with a dust collector, it is possible to facilitate the collection of rice bran and improve the working environment.

[0057] This type of cutting-type dry rice washing machine is expected to have the following effects:

[0058] First, since the rice washing machine of the present invention processes polished rice to produce pre-washed rice without using mediating materials such as abrasives and adsorbents, operating and maintenance costs are reduced. Furthermore, because mixing, stirring, and separation processes for mediating materials are unnecessary, the configuration and production process are simplified, which is expected to reduce manufacturing costs and improve processing efficiency.

[0059] Furthermore, since the cutting passage (122) of the cutting ring (120) of the present invention is configured in an arc shape, the transfer of polished rice is carried out smoothly within the pre-washed rice processing unit (280), and the surface of the polished rice is uniformly cut, which is expected to improve the quality of the pre-washed rice.

[0060] In addition, the spacing ring (130) has numerous rotating guide blades (133) formed on it, which promotes the transfer of rice, and the transfer guide (140) promotes the separation of residual rice bran. Furthermore, the smooth transfer of rice improves the processing efficiency of pre-washed rice, and at the end of the pre-washed rice processing work, no polished rice remains in the pre-washed rice processing unit and is completely discharged.

[0061] The present invention is not limited to the specific preferred embodiments described above, and various modifications can be made by a person with ordinary skill in the art to which the invention belongs without departing from the spirit of the invention as claimed in the claims, and such modifications fall within the scope of the claims. [Explanation of Symbols]

[0062] 110: Support shaft 111: Hollow 112: External keyway 113: Internal keyway 114: Air supply port 115: Support flange 116: Male threaded section 120: Cutting ring 121: Support shaft insertion hole 122: Cutting passage 123: Cutting teeth 124: Keyway coupling projection 125: Air passage 130: Spacing ring 131: Support shaft insertion hole 132: Notch 133: Rotating induction vane 134: Keyway coupling projection 135: Air passage 140: Transport Guidance Guide 150: Fastening member 151: Female threaded section 160: Cutting roller 180: Wire mesh 181: 1-tier wire mesh 182: Two-tier wire mesh 183: Cutting guide 184: Boundary 185: Reinforcement Rib 186: Coupling flange 200: Rice washing machine 210: Main housing 220: Hopper for adding white rice 230: Wash-free rice outlet 240: Rice bran outlet 250: Drive shaft 260: Transfer screw 270: Electric pulley 280: Rinse-free rice processing unit 290: Bearings

Claims

1. A cutting-type dry rice washing machine comprising a rice input hopper (220) into which polished rice is fed, a transfer screw (260) for transferring the polished rice fed from the rice input hopper (220), a hollow drive shaft (250) for providing driving force to the transfer screw (260), and a rinse-free rice processing unit (280) for removing residual rice bran adhering to the surface of the polished rice transferred from the transfer screw (260), The aforementioned pre-washed rice processing unit (280) includes a cutting roller (160) and a wire mesh (180), The cutting roller (160) is connected to a support shaft (110) at the joint of the drive shaft (250); A number of cutting rings (120) and spacing rings (130) are alternately inserted into the outer circumferential surface of the support shaft (110); A fastening member (150) is fastened to the end of the support shaft (110) to prevent the cutting ring (120) and the spacing ring (130) from falling off; A transfer guide (140) is attached to the surface of a cylindrical member formed by inserting a cutting ring (120) and a spacing ring (130) into the outer circumferential surface of the support shaft (110) so as to have a predetermined inclination angle with respect to the axial direction of the cylindrical member; The system further includes a blower that supplies external air to the hollow portion of the drive shaft (250), The transport guidance guide (140) is made of a metal member having a length that covers the entire length of the cylindrical member, and the metal member is joined by welding with a part of the metal member inserted into a groove formed on the surface of the cylindrical member. A cutting-type dry rice washing machine characterized in that the outer surface of the metal member, when joined with a portion inserted into the groove, protrudes outward from the upper surface of the cutting teeth (123) of the cutting ring (120), and is configured not to come into contact with the inner circumferential surface of the wire mesh (180).

2. The cutting-type dry rice washing machine according to claim 1, characterized in that the transfer guidance guides (140) are arranged one at each of the cylindrical members at opposing positions in the diametrical direction, and a total of two or four are installed.

3. The cutting type dry rice washing machine according to claim 1, characterized in that the cutting passage (122) formed between the cutting teeth (123) of the cutting ring (120) is formed in an arc shape.

4. The cutting-type dry rice washing machine according to claim 1, characterized in that a number of rotating guide blades (133) are formed at equal intervals along the circumferential direction over the entire outer surface of the spacing ring (130).

5. The wire mesh (180) includes a single-layer wire mesh (181) and a double-layer wire mesh (182), Numerous slit-type through holes are formed on the outer surface of the single-stage wire mesh (181), and multiple cutting guides (183) are attached to its inner surface at equal intervals along the circumferential direction. Numerous circular through holes are formed on the outer surface of the two-tiered wire mesh (182). The cutting-type dry rice washing machine according to claim 1, characterized in that the lengths of the first-stage wire mesh (181) and the second-stage wire mesh (182) are formed in a ratio of 1:2 to 1:

4.

6. The cutting-type dry rice washing machine according to claim 5, characterized in that the first-stage wire mesh (181) and the second-stage wire mesh (182) are formed as a single unit.

7. The cutting-type dry rice washing machine according to claim 5, characterized in that the first-stage wire mesh (181) and the second-stage wire mesh (182) are detachably connected.

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