Internal pressure measuring and controlling device of rice polishing machine

Abstract

The utility model relates to the technical field of rice processing, in particular to an internal pressure measuring and controlling device of a rice polishing machine, which comprises a polishing roll, a roll screen is arranged outside the polishing roll, a plurality of groups of support ribs are distributed on the outer wall of the roll screen, and the support ribs are fixedly welded with the surface of the roll screen. A supporting frame is arranged between every two adjacent supporting rib pieces, the two ends of each supporting frame are fixed to the corresponding supporting rib pieces through screws, a plurality of cushion blocks are distributed on the inner side of each supporting frame, strain gauge carriers are arranged on the sides, close to the roller screen, of the cushion blocks, and the supporting frames, the cushion blocks and the strain gauge carriers are fixed through screws. The construction of the internal pressure detection system of the polishing machine is completed by designing a multi-point strain gauge measurement sensor and a multi-path acquisition module; based on measurement data of an internal pressure detection system, quantitative analysis on the influence of factors such as the position of a pressing weight, the rotating speed and feeding control on the polishing pressure is achieved.

Description

Technical Field

[0001] This utility model relates to the field of rice processing technology, and in particular to an internal pressure measurement and control device for a rice polishing machine. Background Technology

[0002] The rice processing generally involves a series of steps, including cleaning, hulling, hulling, milling, polishing, grading, and color sorting. Rice grains milled in a rice mill have a rough surface, with many fine endosperm starch and bran residues accumulating in the depressions, affecting the appearance and storage performance of the rice. Polishing is necessary to address this. After milling, the rice is sprayed with water to moisten it before entering the polishing chamber of the polishing machine. The rotating polishing rollers propel the rice through the chamber, and under certain pressure and temperature, friction polishes the surface of the rice grains, removing surface bran and causing pregelatinization and gelatinization of the starch. The gelatinized starch fills in cracks, resulting in a bright, clean appearance and improved storage and edible quality. However, the polishing process also produces a lot of broken rice, leading to a decrease in polished rice yield and low production efficiency.

[0003] The root cause of broken rice is that the rice grains break when subjected to force exceeding their strength. The key to controlling the broken rice rate lies in controlling the polishing pressure. Higher polishing pressure results in a smoother finish, but it also increases the likelihood of grain breakage, leading to a higher broken rice rate. Different rice varieties require different polishing pressures due to their shape and characteristics. For example, Japonica rice is short, thick, and strong, with good pressure resistance. Indica rice is thin, long, and flat, with low strength and poor pressure resistance. Generally, the polishing pressure is controlled between 39.2-68.6 kPa, but the specific pressure needs to be flexibly adjusted in actual production based on the different rice varieties.

[0004] Currently, polishing pressure is mainly adjusted by applying pressure externally through the pressure gate at the polishing chamber outlet. However, the polishing roller speed, water application rate, air intake, and rice flow rate also affect the polishing pressure. In addition, there are structural factors related to the polishing roller and rice sieve. Under the influence of multiple factors, the pressure inside the polishing chamber exhibits dynamic changes and regional imbalances. Therefore, it is necessary to design a device that can measure and control the internal pressure of the polishing machine to enable real-time pressure adjustment. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned shortcomings in the existing technology by proposing an internal pressure measurement and control device for a rice polishing machine.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] Design an internal pressure measurement and control device for a rice polishing machine, including a polishing roller, a roller screen is provided on the outside of the polishing roller, and support ribs are distributed on the outer wall of the roller screen. Several groups of support ribs are arranged, and the support ribs are welded and fixed to the surface of the roller screen. Support frames are arranged between adjacent support ribs, and the two ends of the support frames are fixed to the corresponding support ribs by screws. Several pads are distributed on the inner side of the support frame, and strain gauge carriers are arranged on the side of the pads near the roller screen. The support frame, pads and strain gauge carriers are fixed together by screws.

[0008] A force-bearing column is provided at one end of the strain gauge carrier away from the pad block. One end of the force-bearing column is welded to the inside of the strain gauge carrier, and the other end of the force-bearing column is installed through the roller screen. A resistance strain gauge is fixedly installed in the middle of the strain gauge carrier.

[0009] In detail, the supporting ribs, support frame, and strain gauge carrier are all made of aluminum alloy.

[0010] In detail, a through hole is provided at the connection position between the roller screen and the force-bearing column, and the inner diameter of the through hole is 0.1 mm longer than the outer diameter of the end of the force-bearing column.

[0011] In detail, two sets of resistance strain gauges are respectively set on the same cross-section of the roller screen, with one set of resistance strain gauges set in each of the horizontal and vertical directions of the roller screen.

[0012] In detail, the number of resistance strain gauges can be set to 8, 16 or 32 groups, and they are evenly distributed on the surface of the roller screen.

[0013] The design scheme proposed in this utility model has the following beneficial effects in application:

[0014] 1. The internal pressure detection system of the polishing machine was constructed by designing a multi-point strain gauge measurement sensor and a multi-channel acquisition module;

[0015] 2. As described in 1, based on the measurement data of the internal pressure detection system, a quantitative analysis of the influence of factors such as the position of the pressure roller, the rotation speed, and the feed control on the polishing pressure is realized. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall front structure of this utility model;

[0017] Figure 2 This is an enlarged schematic diagram of point A in this utility model;

[0018] Figure 3 This is a side view of the overall structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the internal structure of this utility model.

[0020] In the figure: 1. Polishing roller; 2. Roller screen; 3. Support rib; 4. Support frame; 5. Strain gauge carrier; 6. Force column; 7. Pad block; 8. Resistance strain gauge. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Reference Figures 1-4 An internal pressure measurement and control device for a rice polishing machine includes a polishing roller 1, a roller screen 2 is provided on the outside of the polishing roller 1, and support ribs 3 are distributed on the outer wall of the roller screen 2. Several groups of support ribs 3 are provided. The support ribs 3 are welded and fixed to the surface of the roller screen 2. A support frame 4 is provided between adjacent support ribs 3. The two ends of the support frame 4 are fixed to the corresponding support ribs 3 by screws. Several pads 7 are distributed on the inner side of the support frame 4. A strain gauge carrier 5 is provided on the side of the pads 7 near the roller screen 2. The support frame 4, the pads 7 and the strain gauge carrier 5 are fixed together by screws.

[0023] A force-bearing column 6 is provided at the end of the strain gauge carrier 5 away from the pad block 7. One end of the force-bearing column 6 is welded to the inside of the strain gauge carrier 5, and the other end of the force-bearing column 6 is provided through the roller screen 2. A resistance strain gauge 8 is fixedly installed in the middle of the strain gauge carrier 5.

[0024] It should be further noted that the supporting ribs 3, the supporting frame 4, and the strain gauge carrier 5 are all made of aluminum alloy.

[0025] It should be further noted that a through hole is provided at the connection position between the roller screen 2 and the force-bearing column 6, and the inner diameter of the through hole is 0.1 mm longer than the outer diameter of the end of the force-bearing column 6.

[0026] It should be further noted that two sets of resistance strain gauges 8 are respectively arranged on the same cross section of the roller screen 2, and the two sets of resistance strain gauges 8 are respectively arranged in the horizontal and vertical directions of the roller screen 2.

[0027] It should be further noted that the number of resistance strain gauges 8 can be set to 8, 16 or 32 groups, and they are evenly distributed on the surface of the roller screen 2.

[0028] Working method: A support frame 4 is installed on the support rib 3. The support frame 4 has a U-shaped structure. One end of the strain gauge carrier 5 is fixedly installed on the support frame 4 and raised by the pad block 7 so that the strain gauge carrier 5 is in a cantilever state. The other end is equipped with a force-bearing column 6. A hole is made on the roller screen 2. The size of the hole is slightly larger than the force-bearing surface of the force-bearing column 6 by 0.1mm. The force-bearing column 6 is inserted into the hole and bears the material pressure from the polishing chamber.

[0029] The force-bearing column 6 can be of various sizes to meet the pressure sampling requirements of different areas. The force-bearing column 6 can be adjusted up and down on the strain gauge carrier 5 to penetrate into the polishing chamber, so that the upper surface of the force-bearing column 6 is flush with the sieve plate, and the pressure measurement does not affect the gap characteristics of the original polishing chamber.

[0030] Without altering the original polishing characteristics of the system, resistance strain gauges 8 are attached to strain gauge carriers 5, one in each of the X and Y directions. Multiple sets of measurement units can be deployed on a single polishing machine, supporting combined applications of 8, 16, and 32 sets, enabling multi-point measurement and analysis of the overall pressure distribution.

[0031] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A device for measuring and controlling the internal pressure of a rice polisher, comprising a polishing roller (1), characterized in that: The outer part of the polishing roller (1) is provided with a roller screen (2), support ribs (3) are arranged on the outer wall of the roller screen (2), the support ribs (3) are arranged in groups, the support ribs (3) are welded and fixed with the surface of the roller screen (2), support frames (4) are arranged between adjacent support ribs (3), the two ends of the support frame (4) are fixed with the corresponding support rib (3) through screws, a plurality of cushion blocks (7) are arranged on the inner side of the support frame (4), a strain gage carrier (5) is arranged on the side of the cushion block (7) close to the roller screen (2), the support frame (4), the cushion block (7) and the strain gage carrier (5) are fixed through screws; One end of the strain gage carrier (5) away from the cushion block (7) is provided with a stress column (6), one end of the stress column (6) is welded in the inner part of the strain gage carrier (5), the other end of the stress column (6) penetrates the roller screen (2), and a resistance strain gage (8) is fixedly installed at the middle position of the strain gage carrier (5).

2. The internal pressure measuring and controlling device of a rice polisher according to claim 1, wherein: The support rib (3), the support frame (4) and the strain gage carrier (5) are all made of aluminum alloy material.

3. The internal pressure measuring and controlling device of a rice polisher according to claim 1, wherein: The connecting position of the roller screen (2) and the stress column (6) is provided with a via hole, and the inner diameter of the via hole is 0.1mm longer than the outer diameter of the end of the stress column (6).

4. The internal pressure measuring and controlling device of a rice polisher according to claim 1, wherein: Two groups of resistance strain gauges (8) are arranged on the same cross section of the roller screen (2), and one group of resistance strain gauges (8) is arranged along the horizontal and vertical directions of the roller screen (2) respectively.

5. The internal pressure measuring and controlling device of a rice polisher according to claim 1, wherein: The number of resistance strain gauges (8) can be 8 groups, 16 groups or 32 groups, and they are uniformly distributed on the surface of the roller screen (2).

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