Upward air suction rice husking machine with three-change type uniform pressure emery roll

Abstract

The utility model discloses a lower air suction rice mill with a three-change type uniform pressure emery roll, which comprises a rack (14), a rice milling device (2) and an air suction device (1) are fixed on the rack (14), an upper air suction cover (5) is fixed at the top of the air suction device (1), a selenium collecting hopper (6) is fixed at the bottom of the air suction device (1), a selenium discharging device (7) is fixed at the bottom of the selenium collecting hopper (6), and the emery roll (9) is arranged in the rice milling device (2). The device is characterized in that the outer diameter of the emery roll (13) is gradually reduced from front to back, the front propelling angle alpha of the front section of a spiral groove of the emery roll (13) is smaller than the front propelling angle alpha 1 of the rear section of the emery roll (13), and the rear propelling angle beta of the front section of the spiral groove of the emery roll (13) is larger than the rear propelling angle beta 1 of the rear section of the emery roll (13); the screw pitch S of the front section of the spiral groove of the emery roll (13) is larger than the screw pitch S1 of the rear section of the emery roll. The pressure in the rice milling chamber can be uniform, the conveying capacity is improved, and stuffy running caused by insufficient front-section conveying force is avoided.

Description

Technical Field

[0001] The utility model relates to an upper suction rice milling machine with a three-variable uniform pressure sand roller, which is specifically suitable for grain milling equipment for roughing, whitening and fine milling of various grains such as white rice, glutinous rice, sorghum and coix rice. Technical Background

[0002] Rice is the staple food of more than half of the world's population. About 60% of the population in my country relies on rice as their staple food. It is the top priority to ensure food security. Appropriate processing and precise processing have become the main theme of the rice milling industry, and its main goal is to increase the yield of rice and reduce energy consumption. The rice mill is the core equipment of the rice processing industry, and plays a pivotal role in improving the yield and reducing energy consumption. At present, the suction methods of horizontal rice mills are divided into two forms: upper suction and lower suction. Relatively traditional and widely used suction methods, the lower suction method is the most common. However, the upper suction method has been gradually adopted by the market due to its unique technical advantages, and a market pattern has been formed in which the two suction methods coexist. Working principle of horizontal rice milling machine: brown rice passes through the feed hopper, magnetic separation device, flow regulating mechanism and enters the whitening chamber, and is then sent to the sand roller by the spiral head and spirally moves along the surface of the sand roller. The sharp sand grains on the surface of the diamond sand roller rotating at a certain linear speed grind the cortex of the brown rice, and make the rice grains and the rice grains and the rice sieve rub against each other to make the rice rough and whitened. The sand roller is one of the most core parts of the rice milling machine, symbolizing the "heart" of the rice milling machine. The determination of important technical parameters such as the external size and shape of the sand roller plays a vital role in energy saving and consumption reduction of the rice milling machine, and improving the rice output rate and whitening efficiency. Traditionally, the sand roller of the suction rice milling machine has the following defects: such as Figure 1 Shown

[0003] 1. The outer diameter ΦD is usually the same from front to back and does not change;

[0004] 2. The advancing front angle ɑ and the advancing rear angle β of the spiral groove are usually the same from front to back and do not change;

[0005] 3. The pitch S of the spiral groove is usually the same from front to back and does not change;

[0006] This will lead to uneven pressure in the front and back of the rice milling room and inconsistent wear on the front and back sections. At the same time, since the pitch has not changed, the conveying capacity of the emery roller cannot be guaranteed, and the insufficient conveying force in the front section may cause rice to accumulate and cause "stuck mill". Summary of the invention

[0007] The utility model aims to solve the defects of the existing rice milling machines and provide an upper suction rice milling machine with a three-variable uniform pressure sand roller, which can achieve uniform pressure in the rice milling chamber, reduce the wear of the sand roller, improve the conveying capacity, and avoid "stuck car" caused by insufficient conveying force in the front section.

[0008] The technical scheme of the utility model is implemented as follows: it comprises a frame (14), on which a rice milling device (2), an air suction device (1), a feeding device (3) and a driving motor (4) are fixed, an upper air suction cover (5) is fixed on the top of the air suction device (1), a selenium collecting hopper (6) is fixed on the bottom of the air suction device (1), and a selenium discharge device (7) is fixed on the bottom of the selenium collecting hopper (6), and a sand roller (9) is installed in the rice milling device (2), characterized in that: the outer diameter of the sand roller (9) gradually decreases from front to back, the advancing front angle ɑ of the front section of the spiral groove of the sand roller (9) is smaller than the advancing front angle ɑ1 of the rear section of the sand roller (9), and the advancing rear angle β of the front section of the spiral groove of the sand roller (9) is larger than the advancing rear angle β1 of the rear section of the sand roller (9); the pitch S of the front section of the spiral groove of the sand roller (9) is larger than the pitch S1 of the rear section of the sand roller. This strengthens the driving force of the front section of the sand roller. The pitch S of the front section of the spiral groove of the sand roller (9) is greater than the pitch S1 of the rear section of the sand roller. This can improve the conveying capacity of the sand roller and avoid "stuck car" caused by insufficient conveying force in the front section.

[0009] The preferred technical solution of the utility model is: the front angle ɑ is 22.5-35 degrees, the rear angle β is 57-69.5 degrees, and the pitch S is 70-120 mm.

[0010] The preferred technical solution of the utility model is: the feeding device (3) is equipped with a manual adjustment self-locking device, the manual adjustment self-locking device comprises a rotating rod (16), the top of the rotating rod (16) is equipped with a rotating handle (17), the front end of the rotating rod (16) is fixed with a rotating rod bracket (18), a row of fan-shaped circular holes (19) are opened on the support plate of the rotating rod bracket (18), a rotating arm (20) is fixed behind the rotating rod bracket (18), a spring ball (21) is fixed at a position corresponding to the fan-shaped circular hole (19) on the rotating arm (20), and the rear end of the rotating rod (16) is connected to the gate (24) of the feeding device (3). The rear end of the rotating rod (16) is connected with a coupling (22), the output shaft of the coupling (22) is connected with a fan-shaped gear (23), and the fan-shaped gear (23) is meshed with a rack (25) fixed on the gate (24).

[0011] The utility model optimizes and precisely designs the "emery roller", the core component of the rice milling machine, so that the three core rice milling functions of the emery roller, "whitening, tumbling, and conveying", can be fully exerted at different stages in the whitening room. Through reasonable optimization combination, the purpose of appropriate processing and precise processing of different rice varieties can be achieved, thereby improving the output rate and reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 . It is a schematic diagram of the structure of the prior art;

[0013] Figure 2 .It is a schematic diagram of the structure of the utility model;

[0014] Figure 3 .It is a schematic diagram of the structure of the rice milling device of the utility model;

[0015] Figure 4 .It is a schematic diagram of the structure of the sand roller of the utility model;

[0016] Figure 5 .It is a structural diagram of the selenium collecting bucket of the utility model;

[0017] Figure 6 for Figure 5 AA section view;

[0018] Figure 7 for Figure 5 BB section view; DETAILED DESCRIPTION

[0019] The utility model is further described below in conjunction with the accompanying drawings:

[0020] like Figure 2 , Figure 3 As shown, the utility model comprises a frame (14), on which a rice milling device (2), an air suction device (1), a feeding device (3) and a driving motor (4) are fixed, an upper air suction cover (5) is fixed on the top of the air suction device (1), a selenium collecting hopper (6) is fixed on the bottom of the air suction device (1), a selenium discharge device (7) is fixed on the bottom of the selenium collecting hopper (6), and a sand roller (9) is installed in the rice milling device (2), and the outer diameter of the sand roller (9) is It gradually decreases from large to small from front to back, ensuring that the volume of the front section of the grinding chamber is reduced, thereby increasing the pressure on the front of the emery roller, making the pressure and wear of the emery roller consistent; the front thrust angle ɑ of the front section of the spiral groove of the emery roller (9) must be smaller than the front thrust angle ɑ1 of the rear section of the emery roller (9), and the rear thrust angle β of the front section of the spiral groove of the emery roller (9) must be larger than the rear thrust angle β1 of the rear section of the emery roller (9); the pitch S of the front section of the spiral groove of the emery roller (9) must be larger than the pitch S1 of the rear section of the emery roller. This strengthens the driving force of the front section of the emery roller, and the pitch S of the front section of the spiral groove of the emery roller (9) must be larger than the pitch S1 of the rear section of the emery roller. This can improve the conveying capacity of the emery roller and avoid "stuck vehicle" caused by insufficient conveying force in the front section. Figure 4 As shown, the front angle ɑ is 22.5-35 degrees, the back angle β is 57-69.5 degrees, and the pitch S is 70-120 mm. Figure 5 , Figure 6 and Figure 7As shown, the feeding device (3) is provided with a manually adjustable self-locking device, which comprises a rotating rod (16), a rotating handle (17) is provided at the top of the rotating rod (16), a rotating rod bracket (18) is fixed at the front end of the rotating rod (16), a row of fan-shaped circular holes (19) are opened on the support plate of the rotating rod bracket (18), a rotating arm (20) is fixed behind the rotating rod bracket (18), a spring ball (21) is fixed at a position corresponding to the fan-shaped circular holes (19) on the rotating arm (20), and the rear end of the rotating rod (16) is connected to the gate (24) of the feeding device (3). The rear end of the rotating rod (16) is connected to a coupling (22), the output shaft of the coupling (22) is connected to a fan-shaped gear (23), and the fan-shaped gear (23) is meshed with a rack (25) fixed on the gate (24).

Claims

1. An upper suction rice milling machine with a three-variable uniform pressure sand roller, comprising a frame (14), a rice milling device (2), a suction device (1), a feeding device (3) and a driving motor (4) are fixed on the frame (14), an upper suction cover (5) is fixed on the top of the suction device (1), a selenium collecting hopper (6) is fixed on the bottom of the suction device (1), a selenium discharge device (7) is fixed on the bottom of the selenium collecting hopper (6), and a sand roller (9) is installed in the rice milling device (2), characterized in that: The outer diameter of the sand roller (9) gradually decreases from front to back, the advancing front angle ɑ of the front section of the spiral groove of the sand roller (9) is smaller than the advancing front angle ɑ1 of the rear section of the sand roller (9), the advancing rear angle β of the front section of the spiral groove of the sand roller (9) is larger than the advancing rear angle β1 of the rear section of the sand roller (9); the pitch S of the front section of the spiral groove of the sand roller (9) is larger than the pitch S1 of the rear section of the sand roller.

2. The upper suction rice milling machine with three-variable uniform pressure sand roller according to claim 1, characterized in that: The front angle ɑ is 22.5-35 degrees, the rear angle β is 57-69.5 degrees, and the pitch S is 70-120 mm.

3. The upper suction rice milling machine with three-variable uniform pressure sand roller according to claim 1, characterized in that: The feeding device (3) is provided with a manually adjustable self-locking device, which comprises a rotating rod (16), a rotating handle (17) is provided at the top of the rotating rod (16), a rotating rod bracket (18) is fixed at the front end of the rotating rod (16), a row of fan-shaped circular holes (19) are opened on the support plate of the rotating rod bracket (18), a rotating arm (20) is fixed behind the rotating rod bracket (18), a spring ball (21) is fixed at a position on the rotating arm (20) corresponding to the fan-shaped circular holes (19), and the rear end of the rotating rod (16) is connected to the gate (24) of the feeding device (3).

4. The upper suction rice milling machine with three-variable uniform pressure sand roller according to claim 3, characterized in that: The rear end of the rotating rod (16) is connected to a coupling (22), the output shaft of the coupling (22) is connected to a sector gear (23), and the sector gear (23) is meshed with a rack (25) fixed on the gate (24).

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