CN210671326U - A double-cylinder screen cleaning device and its longitudinal axial flow regeneration rice combine harvester - Google Patents

Abstract

The utility model provides a double-cylinder screen cleaning device and its longitudinal axial flow regeneration rice combine harvester, comprising a double-cylinder screen and a double-outlet cleaning fan, wherein the lower air outlet of the double-outlet cleaning fan is located at a The front of the double-cylinder screen is used to cooperate with the double-cylinder screen to blow the large impurities out of the machine; the upper air outlet of the double-outlet cleaning fan is located above the double-cylinder screen, which is used for the threshing device. Light impurities are blown out of the machine directly. The grain slide plate and the shaking plate divide the cleaning chamber into an upper cleaning area and a lower cleaning area, and the upper cleaning area is used to blow the light impurities discharged from the threshing device directly out of the machine; the lower cleaning area The area is used to blow large debris out of the machine. The utility model makes full use of the limited longitudinal space between the threshing device and the cleaning mechanism to carry out preliminary air selection, can reduce the design power of the cylindrical screen, reasonably utilize the fan, and directly blow the light impurities out of the machine without passing through the cylinder. Sieve toss.

Description

A double-cylinder screen cleaning device and its longitudinal axial flow regeneration rice combine harvester

technical field

The utility model relates to the field of harvester cleaning devices or the field of agricultural harvesting equipment, in particular to a double-cylinder screen cleaning device and a longitudinal axial flow regeneration rice combine harvester.

Background technique

Regenerative rice is a type of rice variety that uses dormant buds surviving on the rice piles after harvesting to make it head and mature again. Compared with traditional rice, it has many advantages. In recent years, the yield per unit of rice has reached a bottleneck. Planting regenerative rice can effectively improve Multiple cropping index to improve rice yield. When the first season rice is harvested, the stems of the crops are lush and leafy, and the moisture content is high; in order to ensure that the rice piles can be headed again in the second season, the agronomic requirements of high stubble remaining in the first season of regenerated rice are harvested; After the rolling of rice piles is unavoidable, losses should be minimized.

The threshing device is an important working part of the combine harvester, which is used to separate the fed crop grains from its stalks. According to the arrangement characteristics of the threshing drum, the commonly used threshing devices can be roughly divided into horizontal axial flow and vertical axial flow. Among them, the horizontal axial flow threshing device has a simple structure, is convenient for maintenance, and has common accessories, but its harvesting varieties are single. The axial flow threshing device has a large threshing area and good effect, and is suitable for a variety of crops.

The cleaning device is an important part of the rice-wheat combine harvester, and its performance directly affects the operation effect of the whole machine. Fan vibrating screen cleaning device has high stability and strong adaptability. It is a widely used cleaning device at present, but its structure is huge and complex, and it requires high power and vibration. Therefore, it cannot fully meet the working requirements of the regenerative rice harvester. There are agronomic requirements for high stubble left in the first season of regenerated rice, that is, only the length of about 40cm below the ear of the rice is harvested. Compared with harvesting traditional rice, the exudates of regenerated rice have high water content and extremely large grain content, which can reach 80 cm. % to 90%, and the rest is generally a combination of light impurities and short stalks. Therefore, under the appropriate feeding amount, it is more suitable to use a drum sieve cleaning mechanism to harvest regenerated rice than to harvest traditional rice.

Compared with the vibrating screen cleaning device, the double-cylinder screen cleaning device has the advantages of simple structure, reliable operation, light weight, low vibration, good moisture performance, good cleaning effect on materials with high grain content and low impurity content, and is in line with regeneration. Characteristics of rice exudates. However, due to its structural characteristics, the traditional cylindrical screen cleaning mechanism is usually used in conjunction with the horizontal axial flow threshing drum. As shown in Figure 1, the cylindrical screen is placed horizontally in the casing, the cylindrical screen shaft, the threshing drum shaft and the fan The shafts are arranged in parallel, the front sieve is located directly below the threshing drum, the material to be excreted falls above the front cylindrical sieve first, and the rear cylindrical sieve only accepts the materials thrown by the front cylindrical sieve. With the cooperation of the high suspension speed, the grains with high suspension speed fall into the grain feeding auger through the cylindrical screen, the light impurities with low suspension speed are blown out of the machine, and the impurities such as stems and leaves are thrown out by the rear cylindrical screen. Air blows out of the case. In this way, the light impurities, short stalks and stalk leaves need to be thrown through the cylindrical screen, which increases the rated power of the cylindrical screen; and the tuyere of the fan removes the light impurities, short stems and leaves from the bottom of the cylindrical screen. The stalk leaves are blown out of the casing, and the utilization rate of the fan is not high.

SUMMARY OF THE INVENTION

Aiming at the deficiencies in the prior art, the utility model provides a double-cylinder screen cleaning device and its longitudinal axial flow regeneration rice combine harvester, which make full use of the limited longitudinal space between the threshing device and the cleaning mechanism for preliminary Air selection can reduce the design power of the cylindrical screen, and make reasonable use of the fan to blow the light impurities directly out of the machine without the need of throwing through the cylindrical screen.

The present invention achieves the above technical purpose through the following technical means.

A double-cylinder screen cleaning device includes a double-cylinder screen and a double-outlet cleaning fan. The lower air outlet of the double-outlet cleaning fan is located in front of the double-cylinder screen and is used to cooperate with the double-cylinder The screen blows the large impurities out of the machine; the upper air outlet of the double outlet cleaning fan is located above the double cylinder screen, and is used to directly blow the light impurities discharged from the threshing device out of the machine.

Further, the lower air outlet of the double outlet cleaning fan is divided into an upper air duct and a lower air duct by an air guide plate; It is used to blow the air flow below the screen shaft of the double-cylinder screen.

Further, the air inlet angle a of the double outlet cleaning fan is not less than 120°, the lower air outlet angle b of the double outlet cleaning fan is 120°～140°; the upper air outlet of the double outlet cleaning fan The angle c is 90° to 100°.

Further, the double-cylinder screen includes a front cylinder screen and a rear cylinder screen, the diameter of the rear cylinder screen is 0.8-1 times the diameter of the front cylinder screen; the rotation speed of the rear cylinder screen is not less than the front cylinder screen The rotating speed of the drum screen.

Further, the double-cylinder screen adopts a fence-type screen, and the screen gap is between 10mm and 20mm.

Further, it also includes a grain sliding plate and a shaking plate, the grain sliding plate and the shaking plate divide the cleaning room into an upper cleaning area and a lower cleaning area, and the upper cleaning area is used for the light impurities discharged from the threshing device. Directly blow out of the machine; the lower cleaning area is used to blow out the large debris out of the machine.

Further, between the double-cylinder screen and the threshing device, a grain sliding plate and a shaking plate in the shape of a funnel are arranged; the upper air outlet of the double-outlet cleaning fan is located above the grain sliding plate.

Further, one end of the grain slide plate is located below the air outlet on the cleaning fan, and the other end of the grain slide plate extends to the edge of the double-cylinder sieve; The included angle between the formed plane and the horizontal plane is greater than 45°; the included angle between the grain sliding plate and the horizontal plane is greater than the internal friction angle of the threshed grains.

Further, the grain slide plate is provided with a guide strip, which is used to guide the materials accumulated on both sides of the grain slide plate to the middle.

Further, the guide strips are symmetrically distributed in the shape of "eight" on the grain slide, and the angle between the guide strips symmetrically distributed in the shape of "eight" is 40° to 80°; the distribution is symmetrical in the shape of "eight". The guide strips divide the blanking openings of the grain slide plate into equal widths. Due to the large amount of material discharged from the longitudinal axial flow threshing device in the front of the cleaning chamber and the uneven horizontal distribution, it follows the law of "high on both sides and low in the middle". The materials accumulated on both sides of the grain slide are guided towards the middle.

Further, one end of the shaking plate is located below the other end of the threshing device, and the other end of the shaking plate is located above the double-cylinder screen; one end of the shaking plate is provided with a vibration mechanism, which is used to make the shaking plate clamp with the horizontal plane. The angle swings between 10° and 25°.

A longitudinal axial flow regeneration rice combine harvester includes the double-cylinder screen cleaning device.

The beneficial effects of the present utility model are:

1. The double-cylinder screen cleaning device of the present utility model can make full use of the limited longitudinal space between the threshing device and the cleaning mechanism to carry out preliminary wind selection through the double-outlet cleaning fan, which can reduce the design power of the cylindrical screen, Reasonable use of the fan, the light impurities are blown out of the machine directly, without the need to throw through the cylindrical screen.

2. The double-cylinder screen cleaning device of the present utility model is used in the vertical axial flow regeneration rice combine harvester through the double-cylinder screen and the double-outlet cleaning fan, which can make full use of their respective advantages and meet the requirements of regeneration. The material characteristics of the first season rice can effectively improve the working effect of the regenerative rice combine harvester.

3. The double-cylinder screen cleaning device of the utility model, the double-outlet cleaning fan can adapt to the working conditions under various feeding amounts on the basis of weight reduction and vibration reduction.

4. The double-cylinder screen cleaning device of the present utility model is divided into an upper air channel and a lower air channel by an air guide plate at the lower air outlet, and the airflow is directed to the upper and lower sides of the double-cylinder screen screen shaft, which can not only effectively improve the The cleaning capacity can also make up for the shortcoming of the limited diameter of the front cylindrical screen.

5. In the double-cylinder screen cleaning device of the present invention, the cylinder screen is driven by a pulley, and the rotation speed of the cylinder screen can be changed by replacing the pulleys with different diameters, and the different rotation speed of the front and rear cylinder screens can be matched, Therefore, it can adapt to different working conditions and improve the cleaning efficiency.

6. The double-cylinder sieve cleaning device of the present utility model adopts a grid screen mesh, which can greatly improve the sieving rate of grains, and is suitable for the characteristics of high grain content of regenerated rice exudates, which is not easy to cause blockage. , improve the cleaning efficiency.

7. In the double-cylinder sieve cleaning device described in the present utility model, the grain distribution of the product of the longitudinal axial flow threshing device is that the grain content gradually decreases from the front to the back, and the grains in the front 2/3 of the casing are prone to accumulation, and the grain slides. The angle between it and the horizontal plane is greater than the internal friction angle of the rice grains, which can ensure that the grains slide into the front cylindrical sieve smoothly.

8. In the double-cylinder sieve cleaning device of the present utility model, the grain distribution of the product of the longitudinal axial flow threshing device is that the grain content gradually increases from the middle to the two sides. It can make the exudates evenly fall on the front cylindrical screen, reduce the cleaning load and improve the cleaning effect.

9. The vertical axial flow regeneration rice combine harvester of the present utility model has a small vertical space between the threshing drum and the cleaning screen, and the double-exit cleaning fan, the grain sliding plate and the shaking plate divide the cleaning room into two parts. The upper and lower areas, and the rear half of the casing adopts a shaking plate, which can shake the protruding material to the front cylindrical screen within a limited inclination angle, leaving more longitudinal space, and the gap between the shaking plate and the concave plate screen is formed. In the process of falling into the front cylindrical sieve along the grain sliding plate and the shaking plate, the protruding material first passes through the air selection of the air outlet on the cleaning fan, so that the material is cleaned twice in the limited space. , improve the cleaning quality.

Description of drawings

Fig. 1 is the schematic diagram of cylinder screen cleaning mechanism in the prior art;

Fig. 2 is the structural schematic diagram of the double-cylinder screen cleaning device according to the utility model;

3 is a schematic diagram of the angle of the inlet and outlet of the dual-outlet cleaning fan according to the utility model;

Fig. 4 is the structural representation of the cylindrical sieve described in the utility model;

FIG. 5 is a schematic view of the structure of the grain slide plate according to the present utility model;

Fig. 6 is the top view of the grain sliding plate according to the utility model;

FIG. 7 is a schematic structural diagram of the shaking plate according to the present invention.

In the picture:

1- Double outlet cleaning fan; 2- Air deflector; 3- Cylinder screen; 4- Grain slide plate; 5- Grain feeding auger; 6- Shaking plate; 7- Vibration mechanism; Front cylindrical screen; 302-rear cylindrical screen; 401- guide strip.

Detailed ways

The present utility model will be further described below with reference to the accompanying drawings and specific embodiments, but the protection scope of the present utility model is not limited thereto.

As shown in Figure 2, the double-cylinder screen cleaning device of the present invention includes a longitudinal axial flow threshing device, a grain feeding auger 5, a double cylinder screen 3 and a double outlet cleaning fan 1. The longitudinal axial flow threshing device The device is located above the double-cylinder sieve 3, and the grain feeding auger 5 is located at the bottom of the double-cylinder sieve 3; the longitudinal axial flow threshing device and the grain feeding auger 5 are existing structures and will not be described. The lower air outlet of the double-outlet cleaning fan 1 is located in front of the double-cylinder screen 3, and is used to cooperate with the double-cylinder screen 3 to blow the large debris out of the machine; The air outlet is located above the double-cylinder screen 3, and the light impurities discharged from the threshing device are directly blown out of the machine. The double outlet cleaning fan 1 makes full use of the limited longitudinal space between the threshing device and the cleaning mechanism for preliminary air separation, which can reduce the design power of the cylindrical screen, and make reasonable use of the fan to blow the light impurities directly out of the machine, instead of Requires throwing through a cylindrical sieve.

The lower air outlet of the double-outlet cleaning fan 1 is divided into an upper air duct and a lower air duct by an air deflector 2; It is used to blow the airflow to the bottom of the double-cylinder screen 3 screen shaft. The lower air outlet is divided into an upper air duct and a lower air duct by an air guide plate, and the airflow is directed to the upper and lower sides of the double-cylinder screen 3 screen shafts, which can not only effectively improve the cleaning capacity, but also make up for the limited diameter of the front cylinder screen. .

The double outlet cleaning fan 1 can be a cross-flow fan. As shown in FIG. 2 , the air inlet angle a of the double outlet cleaning fan 1 is not less than 120°, and the lower air outlet of the double outlet cleaning fan 1 Angle b, that is, the central angle corresponding to the lower diffuser arc is 120°-140°; the upper outlet angle c of the double outlet cleaning fan 1 corresponds to the central angle of the upper diffuser arc is 90°-100°.

The double cylinder screen 3 includes a front cylinder screen 301 and a rear cylinder screen 302, which are used in the longitudinal axial flow regeneration rice combine harvester through the double cylinder screen and the double outlet cleaning fan, which can make full use of their respective advantages. The advantages are in line with the material characteristics of the first crop of regenerated rice, and can effectively improve the working effect of the regenerated rice combine harvester. The rotation speed of the front drum screen 301 and the rear drum screen 302 may be inconsistent, and the rotation speed of the front drum screen 301 and the rear drum screen 302 may be inconsistent through any transmission shaft in the harvester and using different belt rotations. The rotating speed of the cylindrical screen can be changed by replacing the pulleys with different diameters, and the different rotating speeds of the front and rear cylindrical screens can be matched, so as to adapt to different working conditions and improve the cleaning efficiency; the diameter of the rear cylindrical screen 302 is the same as that of the front cylindrical screen. The diameter of the sieve 301 is 0.8-1 times; the rotational speed of the rear cylindrical sieve 302 is not less than the rotational speed of the front cylindrical sieve 301 . As shown in FIG. 3 , the double-cylinder screen 3 adopts a fence-type screen, and the gap between the screens is between 10mm and 20mm, which can greatly improve the sieving rate of grains, and is suitable for regenerated rice with high grain content. It is not easy to cause blockage and improves the cleaning efficiency.

As shown in Fig. 2, Fig. 5 and Fig. 6, the grain sliding plate 4 and the shaking plate 6 divide the cleaning chamber into an upper cleaning area and a lower cleaning area, and the upper cleaning area is used to discharge the threshing device The light impurities are directly blown out of the machine; the lower cleaning area is used to blow the large impurities out of the machine. Between the double-cylinder screen 3 and the concave screen 8 of the threshing device, a grain sliding plate 4 and a shaking plate 6 that form a funnel shape are arranged; the upper air outlet of the double-outlet cleaning fan 1 is located above the grain sliding plate 4 . One end of the grain slide 4 is located below the air outlet on the cleaning fan 1, and the other end of the grain slide 4 extends to the edge of the front cylindrical screen 301; the end edge of the grain slide 4 is connected to the front cylindrical screen 301. The included angle between the plane formed by the axis of the sieve shaft and the horizontal plane is greater than 45°; the included angle between the grain slide plate 4 and the horizontal plane is greater than the internal friction angle of the threshed grains. Since the distribution of grains of the threshing device of the longitudinal axial flow is that the content of grains gradually decreases from front to back, the grains in the front 2/3 of the casing are prone to accumulation, and the angle between the grain sliding plate and the horizontal plane is greater than the internal friction angle of the rice grains. Ensure that the kernels slide smoothly into the front drum screen. The grain slide 4 is provided with a guide strip 401 for guiding the materials accumulated on both sides of the grain slide 4 to the middle. The guide strips 401 are symmetrically distributed in the shape of "eight" on the grain slide 4, and the angle between the guide strips 401 symmetrically distributed in the shape of "eight" is 40°-80°; The distributed guide strips 401 equally divide the blanking openings of the grain slide plate 4 into equal widths. Due to the large amount of material and uneven lateral distribution of the material discharged from the longitudinal axial flow drum in the front of the cleaning room, the rule of "two sides is high and the middle is low", therefore, the upper surface of the grain slide plate 4 is provided with two "eight" shaped The distributed guide bars 401 guide the materials accumulated on both sides to the middle. The two guide bars 401 are symmetrically distributed, and the included angle between the two and the symmetry axis is 20° to 40°. The blanking area is divided into three areas of equal length, as shown in Figure 6.

As shown in FIG. 2 and FIG. 7 , one end of the shaking plate 6 is located below the other end of the concave screen 8 of the threshing device, and the other end of the shaking plate 6 is located above the rear cylindrical screen 302; one end of the shaking plate 6 A vibrating mechanism 7 is provided, and the vibrating mechanism 7 is an eccentric vibrating mechanism for swinging the shaking plate 6 at an included angle of 10° to 25° with the horizontal plane.

A longitudinal axial flow regenerative rice combine harvester, including the double-cylinder screen cleaning device, the longitudinal space between the threshing device and the cleaning screen is small, and the double-outlet cleaning fan 1, the grain sliding plate 4 and the vertical space are small. The shaker plate 6 divides the cleaning room into two areas, the upper and lower areas, and the shaker plate 6 is used in the rear part of the casing to shake off the protruding material to the front cylindrical screen 301 within a limited inclination angle, leaving more vertical space. , the gap between the shaking plate 6 and the concave plate screen 8 constitutes the air outlet, and the protruding material first passes through the air outlet on the cleaning fan in the process of falling into the front cylindrical screen along the grain slide plate 4 and the shaking plate 6 Wind selection, so that the material is cleaned twice in a limited space, which improves the cleaning quality.

work process:

As shown in Figure 2, the threshed material falls on the grain slide plate 4 and the shaking plate 6 above the cleaning mechanism from the longitudinal direction of the entire threshing device. According to the characteristics of the longitudinal axial flow threshing drum, the first 2/3 length of the mechanism is released The grain content of the material is high and the distribution is uneven, and the fallen grains are easy to accumulate. The grain content of the protruding material in the last 1/3 of the length is low and the distribution is relatively uniform. The angle between the grain sliding plate 4 and the horizontal plane is greater than the inner friction angle of the grain. Therefore, the exudates can slide down the grain slide plate 4; the shaking plate 6 can be a corrugated plate by shaking at a certain frequency, and pushes the exudates falling on it forward, and the guide strips welded on the upper surface of the grain slide plate 5 have It is beneficial for the protruding material to fall horizontally and evenly above the front cylindrical screen 301. At the same time, the air flow blown out from the air outlet on the double outlet cleaning fan 1 will be air-selected during the process of falling to the front cylindrical screen 301. The light impurities in the protruding material will be blown out of the machine from the air outlet formed between the rear of the shaking plate 6 and the concave screen 8 along with the air flow. The cylindrical screen 3 adopts a fence type screen, which effectively improves the penetration rate of the grains. The cylindrical screen 3 rotates at a uniform speed, and the smaller-sized particles such as grains and some fine impurities in the exudate pass through the screen, and the floating coefficient of the grains is relatively high. Large, after passing through the cylindrical screen 3, it falls into the grain feeding auger 6, and the floating coefficient of fine impurities is small. Large debris such as blades that do not pass through the sieve holes are thrown backward by the front cylindrical screen 301 and the rear cylindrical screen 302 successively, and are blown out of the machine through the debris outlet with the cooperation of the airflow.

The embodiments are the preferred embodiments of the present invention, but the present invention is not limited to the above-mentioned embodiments, and any obvious improvements that can be made by those skilled in the art without departing from the essence of the present invention , replacement or modification all belong to the protection scope of the present invention.

Claims (12)

1. A double-cylinder screen cleaning device is characterized in that, comprising a double-cylinder screen (3) and a double-outlet cleaning fan (1), and the lower air outlet of the double-outlet cleaning fan (1) is located at the The front of the double-cylinder screen (3) is used to cooperate with the double-cylinder screen (3) to blow the large debris out of the machine; the upper air outlet of the double-outlet cleaning fan (1) is located in the double-cylinder Above the screen (3), the light impurities discharged from the threshing device are directly blown out of the machine. 2. The double-cylinder screen cleaning device according to claim 1, wherein the lower air outlet of the double-outlet cleaning fan (1) is divided into an upper air duct and a lower air duct by an air guide plate (2). ; The upper air duct is used to blow the air flow to the top of the screen shaft of the double-cylinder screen (3), and the lower air duct is used to blow the air flow to the bottom of the screen shaft of the double-cylinder screen (3). 3. The double-cylinder sieve cleaning device according to claim 1, characterized in that, the air inlet angle a of the double-outlet cleaning fan (1) is not less than 120°, and the double-outlet cleaning fan (1) is not less than 120°. ) of the lower air outlet angle b is 120°～140°; the upper air outlet angle c of the double outlet cleaning fan (1) is 90°～100°. 4. The double-cylinder screen cleaning device according to claim 1, wherein the double-cylinder screen (3) comprises a front cylindrical screen (301) and a rear cylindrical screen (302), and the rear cylindrical screen (302) The diameter of the cylindrical screen (302) is 0.8-1 times the diameter of the front cylindrical screen (301); the rotational speed of the rear cylindrical screen (302) is not less than the rotational speed of the front cylindrical screen (301). 5 . The double-cylinder screen cleaning device according to claim 1 , wherein the double-cylinder screen ( 3 ) adopts a fence-type screen, and the gap between the screens is between 10 mm and 20 mm. 6 . 6. The double-cylinder sieve cleaning device according to claim 1, characterized in that it further comprises a grain sliding plate (4) and a shaking plate (6), the grain sliding plate (4) and the shaking plate (6) will clean the The selection chamber is divided into an upper cleaning area and a lower cleaning area. The upper cleaning area is used to blow the light impurities discharged from the threshing device directly out of the machine; the lower cleaning area is used to blow the large impurities out of the machine. outside. 7. The double-cylinder sieve cleaning device according to claim 1, characterized in that, between the double-cylinder sieve (3) and the threshing device, a grain slide plate (4) and a shaking plate ( 6); the upper air outlet of the double outlet cleaning fan (1) is located above the grain slide plate (4). 8. The double-cylinder sieve cleaning device according to claim 6, wherein one end of the grain slide (4) is located below the air outlet on the cleaning fan (1), and the other end of the grain slide (4) extending to the edge of the double-cylinder screen (3); the included angle between the plane and the horizontal plane formed by the end edge of the grain slide (4) and the axis of the screen axis of the double-cylinder screen (3) is greater than 45°; the The angle between the grain sliding plate (4) and the horizontal plane is greater than the internal friction angle of the threshed grain. 9 . The double-cylinder sieve cleaning device according to claim 6 , wherein the grain slide plate ( 4 ) is provided with guide strips ( 401 ) for separating the two sides of the grain slide plate ( 4 ). 10 . The accumulated material is directed towards the middle. 10. The double-cylinder sieve cleaning device according to claim 9, characterized in that, the guide strips (401) are symmetrically distributed in the shape of an "eight" on the grain slide plate (4), and are in the shape of an "eight". The angle between the symmetrically distributed guide strips (401) is 40° to 80°; the symmetrically distributed guide strips (401) in the shape of an "eight" equalize the width of the blanking opening of the grain slide plate (4). point. 11. The double-cylinder screen cleaning device according to claim 6, wherein one end of the shaking plate (6) is located below the other end of the threshing device, and the other end of the shaking plate (6) is located at the double-circle Above the drum screen (3); one end of the shaking plate (6) is provided with a vibrating mechanism (7) for swinging the shaking plate (6) at an angle of 10° to 25° with the horizontal plane. 12. A longitudinal axial-flow regenerated rice combine harvester, characterized in that it comprises the double-cylinder screen cleaning device according to any one of claims 1-11.

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