CN201153402Y - Half-feed rice thresher - Google Patents

Abstract

The utility model discloses a semi-feeding rice thresher, which comprises an upper drum, a lower drum and an auxiliary drum, a clamping and conveying mechanism, a lifter, a bag filling device and a transmission mechanism, and is characterized in that: the main The cleaning screen is a double-layer screen. Two cleaning fans are arranged side by side at the end of the lower drum. The main fan has a suction port at one end of the upper screen. The air suction ports are respectively arranged at one end of the lower sieve. An air discharge cylinder is arranged above the auxiliary drum, which is connected with the miscellaneous air duct provided on the auxiliary fan, and a spiral piece is arranged on the inner wall of the air discharge cylinder. The main cleaning sieve of the utility model adopts a reciprocating double-layer vibrating screen, and is equipped with two cleaning fans and three suction ports for the main and auxiliary to improve the cleaning rate of rice grains. With the function of the inner spiral, the light material and debris are ejected with the wind, and the heavy granules directly enter the auxiliary drum for re-cleaning. The cleaning effect is excellent, and the impurity content can be close to zero.

Description

Half-feed rice thresher

technical field

The utility model relates to a crop harvesting machine, in particular to a grain thresher.

Background technique

At present, there are many types of crop threshing machines in agriculture, such as single-drum and double-drum, which generally have the problems of unclean air selection, many impurities, low grain removal rate and cleanliness rate, and when threshing rice, rice grains It is more difficult to take off the short stalks with 2 to 3 millimeters at the tail end, and the patent No. applied by the applicant in 2002 is: "three-roller automatic clamping rice thresher" of 02211211.1, and a third roller is added on the thresher Re-extraction improves the grain removal rate and cleaning rate. The cleaning rate of the rice thresher is improved, but the corresponding impurity rate in the rice grains is also high, especially small impurities, such as small stems, etc. Especially when the rice plants are dry and threshing, the impurity content in the rice grains is even higher, and a second impurity removal is required.

Contents of the invention

The purpose of the utility model is to provide a semi-feeding type rice thresher, which can thoroughly remove impurities in rice and reduce the impurity rate.

The semi-feeding rice thresher of the utility model includes an upper drum, a lower drum and an auxiliary drum, a clamping conveying mechanism, a lifter and a bag filling device, and is characterized in that the main cleaning screen arranged under the lower drum is a double-layer screen , two cleaning fans are arranged side by side at the end of the lower drum, the main fan has a suction port set at one end of the upper sieve, the auxiliary fan has two suction ports and a miscellaneous air duct, and the two suction ports are respectively set at the lower sieve one end.

An air discharge cylinder is arranged above the auxiliary drum, which is connected with the miscellaneous air duct provided on the auxiliary fan, and a spiral piece is arranged on the inner wall of the air discharge cylinder.

The main cleaning sieve of the utility model adopts a reciprocating double-layer vibrating screen, and is provided with two cleaning fans and three air suction ports for the main and auxiliary, to supplement the residuals left by the single air suction, and improve the cleaning rate of rice grains. A blower tube is set above, and under the action of the spiral blades in the blower tube, the light material and debris are ejected with the wind, and the heavy granules directly enter the auxiliary drum for re-cleaning. The cleaning effect is excellent, and the impurities rate can be close to zero.

Description of drawings

Fig. 1, Fig. 2 and Fig. 3 are respectively the front view, the back view and the left side view of the semi-feeding rice thresher of the utility model.

Detailed ways

As shown in the figure, the semi-feeding threshing machine consists of a frame 1, an upper drum 8, a lower drum 3, an auxiliary drum 20, a cover plate, a main fan 27, an auxiliary fan 29, an automatic feeding table 5, and a clamping and conveying mechanism 6 , grass discharge plate 15, main cleaning screen 2, auxiliary cleaning screen 21, lifter 9, rice grain removal cylinder 11, reducer 24 and transmission mechanism, the upper and lower drum assemblies are installed on the frame, and the cover The plate is buckled on the upper drum, and the clamping mechanism 6 is composed of two main and auxiliary clamping belts. The tensioning wheel assembly 7 is arranged on the two belts respectively. The main clamping belt is supported and installed on the frame by the pulling wheel and the driving wheel. The auxiliary clamping belt is driven by friction, an automatic feeding table 5 is set at one end of the drum, a grass discharge board 15 is provided at the other end, a main fan 27 and an auxiliary fan 29 are arranged side by side at the tail end of the lower drum shaft, and the auxiliary fan is equipped with a miscellaneous discharge Duct19. The main cleaning screen set under the lower drum is a double-layer screen driven by an eccentric wheel mechanism. Two cleaning fans are arranged side by side at the end of the lower drum, the main fan is provided with a suction port 26 which is arranged at one end of the upper screen, and the auxiliary fan 29 is provided with two suction ports 28, 30 which are respectively arranged at one end of the lower screen. The rear of the frame is provided with an auxiliary drum 20, an air discharge tube 34 arranged above the auxiliary drum, a spiral piece is arranged on the inner wall of the air discharge tube, and the miscellaneous air duct 19 of the auxiliary blower fan is connected with the air discharge tube. A cleaning screen 21 is provided below the auxiliary drum, a lifter 9 is provided at the rear end of the frame, the entrance of the lifter is arranged at the end of the lower sieve, and the rice grain removal cylinder 10 is connected below the outlet. The rice grain removal cylinder is provided with fixed nail teeth 4 in the cylinder, a spiral blade 12 and nail teeth 13 are arranged on the cylinder shaft, and a bag filling device 14 is provided below the outlet. The lifter outlet can also be directly connected with the bag filling device 14, saving the rice grain impurity removal cylinder 10.

When threshing, the grain is placed on the automatic feeding table and transported to the plucking roller, which is sent to the automatic clamping and conveying mechanism by the plucking roller, and is clamped and fed by the clamping belt. Under the action of the teeth, the grains are separated from the stalks, and the stalks that have been removed from the grains are discharged by the grass discharge plate 15 through the grass discharge port 25, and are manually bundled for sideline production; The plates fall into the upper sieve of the main cleaning sieve, the upper sieve is a large-hole sieve, which allows rice grains and small impurities to pass through, while the large stems and impurities remain on the sieve surface and are directly discharged out of the machine by the main fan 27; the lower sieve Part of the impurities in the rice grains is discharged through the sieve holes, and the impurities and shriveled grains (slightly granulated in the shriveled grains) are inhaled through the front and rear suction ports of the auxiliary fan above the lower sieve, and enter the exhaust duct through the miscellaneous discharge air duct , Affected by the helical piece in the blower tube, the light material and debris are sprayed out with the wind, and the heavy granules directly enter the auxiliary drum for re-cleaning.

Claims (2)

1. A semi-feeding rice thresher, comprising an upper drum (8), a lower drum (3), an auxiliary drum (20), a clamping and conveying mechanism, a lifter (9) and a bag filling device (14). It is characterized in that the main cleaning screen (2) arranged under the lower drum is a double-layer reciprocating screen, two cleaning fans are arranged side by side at the end of the lower drum, and the main fan (27) is provided with a suction port (26) on the upper layer One end of the sieve; the auxiliary fan is provided with two air suctions (28, 30) and a miscellaneous air duct (19), and two air suction ports (28, 30) are respectively arranged at one end of the lower sieve. 2. The semi-feeding rice thresher according to claim 1, characterized in that: an air discharge tube (34) is arranged above the auxiliary drum (20) to connect with the miscellaneous air duct (19) arranged on the auxiliary fan, A helical piece is arranged on the inner wall of the vent tube.

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