CN102430522A - Cereal gravity grading stoner - Google Patents

Abstract

The present invention relates to a grain gravity grading stone removal machine, comprising a screen body, an air suction device, a feeding device, a vibration motor, a material outlet and a vibration support. An upper and a lower screen surface are arranged in the screen body, the upper screen surface is composed of an upper screen sheet and a material balancing section, and the lower screen surface is composed of a lower screen sheet and a selection plate. The upper screen surface is connected to the light material outlet, the lower screen surface is connected to the heavy material outlet, a channel connected to the selection plate is arranged at the top of the material balancing section, and the top of the selection plate is connected to the stone discharge port. The feeding device is provided with a material receiving plate, a pressure control plate, a material balancing plate and a material receiving guide plate. The vibration motors are respectively installed on the two side walls of the screen body, and the upper screen sheet and the lower screen sheet are hung and installed on the mounting frame on the side of the screen body by bolts. The improvement of the feeding device by the present invention enables the material to be evenly distributed three times in the feeding device, thereby improving the grading stone removal effect. The external vibration motor has a reasonable vibration direction and low power consumption. The upper and lower screen sheets are hung and installed, and the use performance of the screen sheets is good.

Description

Grain Gravity Grading Stoner

technical field

The invention belongs to the technical field of grain processing equipment, and relates to a grain grading and impurity removal equipment, in particular to a grain gravity grading destoner.

Background technique

In the grain processing industry, grain quality grading and dust removal and cleaning equipment are crucial to the quality of grain products. Gravity grading and destoner machine is widely used in the grain processing industry for grain grading and purification and dust removal equipment. Gravity classifying de-stoner machine is to use the difference of suspension speed between grain particles and heavy impurities (such as stones, metal, glass, etc.) and the difference of suspension speed between heavy and light grain particles to continuously remove stone and Grading not only separates light and heavy impurities, but also effectively classifies heavy and light grain particles. The gravity grading destoner of the prior art has a good destoner effect, but it is difficult to separate out 1%-2% of low-quality wheat. The main problems are: 1. The proportion of separated light wheat is relatively high, 2. There is too much wheat in the stone, 3. The operation is unstable and often changes. The main reasons for the analysis are: ① uneven feed distribution, ② unstable feed volume, and ③ unstable air volume.

The utility model patent with the authorized announcement number CN201799413U discloses "a gravity grading stone removal machine, which involves cleaning equipment for grain processing materials, including a frame, an angle adjustment device on the frame, a sieve body, a material inlet and outlet device, a suction device, The rubber spring and the vibrating motor are characterized in that a feed slot hole is set between the front end of the upper screen body at the feed port end and the screen body positioning plate at the front end of the frame, and the horizontal clearance of the feed slot hole is 10-18mm. The beneficial effect is through A feeding slot is set between the front end of the upper screen surface and the positioning plate of the front screen body of the frame, so that the large stones and heavy materials originally stranded on the upper screen body at the feed inlet can fall smoothly to the lower screen through the feeding slot. Surface cleaning improves the effect of stone removal, which is conducive to improving the production efficiency and economic benefits of the user unit, and is widely applicable to milling enterprises.”. But this utility model patent does not solve the problem of poor classification quality caused by the above-mentioned uneven feeding.

Contents of the invention

In order to overcome the deficiencies of the above-mentioned prior art, the present invention provides a grain gravity grading destoner machine, which improves the feeding device, realizes the uniform distribution of processed grain materials, improves the effect of grading destoner, and improves the quality of processed grain products .

A grain gravity grading destoner machine comprises a sieve body, a suction device, a feeding device, two vibrating motors, a discharge port and a vibrating support. The sieve body is connected with the suction device through the suction pipe, and the inlet of the feeding device is connected with the feed port through the feed pipe. The discharge port includes a light material export, a heavy material export and a stone discharge port. The sieve body is equipped with an upper screen surface and a lower screen surface, the upper screen surface is composed of the upper screen plate and the material equalizing section, and the lower screen surface is composed of the lower screen plate and the selection plate. The upper sieve is connected to the light material outlet, and the lower sieve is connected to the heavy material outlet. The top of the uniform material section is provided with a channel connected to the selection plate, and the top of the selection plate is connected to the stone discharge port. The feeding device is composed of a material receiving plate, a pressure control plate, a material receiving deflector, and a material receiving deflector. Located between the material receiving plate and the uniform material plate, the pressure control plate is located at the outlet end of the material receiving deflector. Two vibrating motors are installed on the two side walls of the lower part of the sieve body, and the upper and lower sieves are hung and installed on the mounting frame on the side of the sieve body with bolts.

The material receiving deflector is an "L" shaped structure. The vibration support includes a front vibration support and a rear vibration support. The front vibration support is a rubber spring structure, and the rear vibration support is equipped with a rubber spring support and adjustment mechanism. The lower part of the feed inlet is provided with a differential pressure gauge. The pressure control plate is composed of a rubber plate and a steel plate, the upper part of the pressure control plate is a rubber plate, the lower part is a steel plate, and the rubber plate is fixed under the receiving plate. The suction pipe and the feed pipe are elastic pipe structures, and the material of the suction pipe and the feed pipe is preferably a rubber hose. The upper sieve is a perforated plate structure, and the aperture of the perforated plate is determined according to the type of grain to be processed. The material of the lower sieve is a steel wire braided mesh structure.

The grain material to be processed is sent to the grain gravity grading destoner through the feeding equipment, and enters the feeding plate of the feeding device through the feeding port for initial homogenization, and the material after the initial homogenization flows to the material receiving deflector, The material is homogenized again on the material receiving deflector, and the material that has been homogenized twice is scattered on the homogeneous plate through the distribution of the pressure control plate for the third homogenization. The pressure control plate is used to make the material receive a certain elastic resistance in the process of flowing downward, and separate it horizontally to avoid local density and ensure the uniform and consistent distribution of the material in the screen width direction.

The invention utilizes the structural characteristics of the feeding device, and the processed materials are homogenized three times during the feeding process of the feeding device, so that the materials are evenly distributed in the homogenizing section, and create a good process for the materials to be classified and stone-removed on the upper and lower sieve surfaces. The conditions are conducive to improving the effect of grain grading and stone removal, and improving the quality of processed grain. Due to the uniform distribution, the problem of grain in the stone is reduced, high-quality wheat does not flow out from the stone discharge port, and the yield of processed grain is improved, which not only ensures high stone removal efficiency, but also increases production. The vibration motor is installed on the two side walls of the screen body, and the external vibration motor drives the screen body to vibrate regularly. The reasonable vibration direction and angle change the material operation system and reduce the dynamic consumption per unit output; at the same time, the vibration motor is external, The space for the export of light materials and heavy materials is expanded, which is beneficial to improve the processing capacity of the grain gravity grading destoner. The upper and upper sieves are respectively hung and installed on the mounting frame on the side of the sieve body by bolts, and fixed tightly to ensure that the upper plane of the sieve is close to the upper plane of the side plate guide groove of the vibrating body, and the screen surface is not easy to move, which is conducive to Improve the performance of the upper and lower sieves and prolong their service life.

Description of drawings

Fig. 1 is the structural representation of grain gravity classification destoner of the present invention;

Fig. 2 is the structural representation of feeding device;

Figure 3 is a schematic diagram of the pressure control board;

Figure 4 Schematic diagram of the installation of the sieve.

in:

1—feed inlet, 2—feed pipe, 3—feeding device, 4—feeding section, 5—selection plate, 6—stone discharge port, 7—sieve body, 8—rear vibrating support, 9— Suction device, 10—suction pipe, 11—upper sieve, 12—light material outlet, 13—lower sieve, 14—heavy material outlet, 15—vibration motor, 16—support, 17—feed plate, 18—pressure control plate, 19—uniform material plate, 20—feeding device inlet, 21—receiving guide plate, 22—rubber plate, 23—steel plate, 24—bolt, 25—glass window, 26—front vibration support.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

Gravity classification destoner of the present invention is as shown in Figure 1, comprises sieve body 7, suction device 9, feeding device 3, two vibrating motors 15, discharge port, front part vibrating support 26 and rear part vibrating support seat 8. The sieve body is connected with the suction device through the suction pipe 10, and the suction device is connected with the vacuum system, and the suction pipe and the feed pipe are all made of rubber hoses. The inlet 20 of the feeding device is connected to the feed port 1 through the feed pipe 2, and the feed port is connected to the grain material conveying equipment through a pipeline. The discharge port includes a light material outlet 12, a heavy material outlet 14 and a stone discharge port 6. The sieve body 7 is provided with an upper sieve surface and a lower sieve surface. The upper sieve surface is composed of an upper sieve 11 and an equalizing section 4. The front part is the upper sieve and the rear is an equalizing section. The upper sieve is a perforated plate structure, and the aperture of the perforated plate is determined according to the type of grain to be processed. The lower sieve surface is composed of the lower sieve 13 and the selection plate 5. The lower sieve is located at the front, and the selection plate is located at the rear. The material of the lower sieve is steel wire mesh. The type is determined. The upper sieve is a large-aperture sieve, and the lower sieve is a small-aperture sieve. The specific size of the sieve is selected according to the particle size of the processed grain. The upper sieve 11 communicates with the light material outlet 12, the lower sieve 13 communicates with the heavy material outlet, the top of the uniform material section is provided with a channel connected with the selection plate, and the top of the selection plate is connected with the stone discharge port. As shown in FIG. 2 , the feeding device 3 is provided with a material receiving plate 17 , a pressure control plate 18 , a material equalizing plate 19 and a material receiving deflector 21 . The material receiving plate is located below the inlet 20 of the feeding device, the material receiving plate is located at the inlet end of the material equalizing section 4, the material receiving deflector is located between the material receiving plate and the material uniforming plate, and the material receiving deflector 21 is "L" Shaped structure, the pressure control plate is located at the outlet end of the material receiving deflector. As shown in Figure 3, pressure control plate 18 is made of rubber plate 22 and steel plate 23, and the top of pressure control plate is rubber plate, and the bottom is steel plate, and rubber plate is fixed on the following of receiving plate 17 with bolt. As shown in FIG. 4 , the upper sieve 11 and the upper sieve 13 are hung and installed on the mounting frame on the side of the sieve body with bolts 24 . Two vibrating motors 15 are respectively installed on the two side walls of the bottom of the screen body. A differential pressure gauge is provided on the suction device. The front vibrating support 26 is a rubber spring structure, and the rear vibrating support 8 is equipped with a rubber spring support and adjustment mechanism. The adjustment mechanism is used to adjust the inclination angle of the upper and lower screen surfaces of the gravity grading destoner machine. Glass windows 25 are installed on the sidewall on the top of the upper sieve surface and the sidewall between the upper sieve surface and the lower sieve surface to observe the situation of the material in the sieve.

Gravity grading stone removal machine of the present invention uses the principle of different specific gravity and suspension speed of processed grain materials and sand to carry out classification and remove impurities. The equipment sends the processed grain (such as wheat) into the feeding device 3 through the feeding port 1 and the feeding pipe 2. In the feeding device, the grain material passes through the feeding plate 17, the feeding guide plate 21 and the uniform material plate 19. The elastic throttling effect of three times of equalizing process and pressure control plate 18 makes grain horizontally and evenly distributed in the equalizing section. The structure with low front and high rear and the vibration effect of the vibrating motor make the grains to be processed run from the material equalizing section 4 to the direction of the screen plate 11 on the upper layer. The grains on the upper sieve are separated under the combined action of the suction wind and the vibrating motor, and the materials with small bulk density and light impurities are suspended on the materials and become the oversize of the upper sieve surface, which is discharged from the light material outlet 12. Light impurities such as material shells and dust on the upper screen surface are sucked away by the suction wind. Part of the materials with small bulk density, sand and mud are separated through the passage from the top of the uniform material section 4 to the selection plate 5 on the lower screen surface, and most of the bulk materials and some sand and mud are under the material flow Pass through the sieve holes and enter the lower sieve surface for re-screening. On the lower sieve surface, heavy impurities such as sand, mud, etc. climb up along the steel wire weaving surface to form a stone collection area by using the difference in material specific gravity and suspension speed, and are discharged from the stone discharge port 6 in turn. The materials with good quality and large volume are discharged from the heavy material outlet 14 to achieve the purpose of grain grading and stone removal. the

Claims (8)

1. A grain gravity grading destoner, comprising a sieve body (7), a suction device (9), a feeding device (3), two vibration motors (15), a discharge port and a vibration support, the The sieve body is connected to the suction device through the suction pipe (10), the inlet of the feeding device is connected to the feed port (1) through the feed pipe (2), and the discharge port includes the light material outlet (12 ), the heavy material outlet (14) and the stone discharge port (6); the upper sieve surface and the lower sieve surface are arranged in the sieve body, the upper sieve surface is composed of the upper sieve sheet (11) and the uniform material section (4), the lower sieve The surface is composed of the lower sieve (13) and the selection plate (5); the upper sieve is connected to the light material outlet (12), the lower sieve is connected to the heavy material outlet (14), and the top of the material equalization section is equipped with a connecting fine The channel of the selection plate, the top of the selection plate is connected with the stone discharge port (10), and the feature is that: the feeding device is composed of a material receiving plate (17), a pressure control plate (18), a uniform material plate 19) and a material receiving guide The material receiving plate is located below the inlet of the feeding device (3), the uniform material plate is located at the inlet end of the uniform material section, and the material receiving deflector is located between the material receiving plate and the uniform material plate Between, the pressure control plate is located at the outlet end of the material receiving deflector; the two vibrating motors are installed on the two side walls of the lower part of the screen body, and the upper screen (11) and the lower screen (13) are bolted ( 24) Hang and install on the mounting frame on the side of the screen body. 2. The grain gravity grading destoner according to claim 1, characterized in that: the material receiving deflector (21) is an "L" shaped structure. 3. Grain gravity grading destoner according to claim 1, characterized in that: the vibration support includes a front vibration support (26) and a rear vibration support (8), and the front vibration support The seat is a rubber spring structure, and the rear vibration support is equipped with a rubber spring support and adjustment mechanism. 4. The grain gravity grading destoner according to claim 1, characterized in that: the lower part of the feed inlet (1) is provided with a differential pressure gauge. 5. Grain Gravity Classification Destoner according to claim 1, characterized in that: the pressure control plate (18) is composed of a rubber plate (22) and a steel plate (23), the upper part of the pressure control plate is a rubber plate, The bottom is a steel plate, and the rubber plate is fixed below the receiving plate (17). 6. The grain gravity grading destoner according to claim 1, characterized in that: the suction pipe (10) and the feed pipe (2) are elastic pipe structures. 7. The grain gravity grading destoner according to claim 6, characterized in that: the suction pipe (10) and the feed pipe (2) are made of rubber hose. 8. The grain gravity grading destoner according to claim 1, characterized in that: the upper sieve (11) is a perforated plate structure, and the aperture of the perforated plate is determined according to the type of grain to be processed; the lower sieve (13) The material is a steel wire braided mesh structure.

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