CN216492127U - Pulverized straw returning device - Google Patents

Abstract

The utility model relates to the field of agricultural equipment, in particular to a pulverized straw returning device, which comprises a device main body and a pulverizing mechanism, wherein a pulverizing cavity is arranged in the device main body, the pulverizing mechanism comprises a driving motor and a rotating shaft driven by the driving motor, a pulverizing blade is arranged on the rotating shaft, a discharge hole is formed in the device main body, a screen is arranged at the discharge hole, a cleaning piece is connected to the rotating shaft in a driving manner, and the cleaning piece is driven to rotate along the inner wall of the pulverizing cavity and the screen; the straw crushing device is simple in structure, and can be used for further crushing the primarily crushed straws of the combine harvester and returning the crushed straws to the field after being screened by the screen.

Description

A powdered straw returning device

technical field

The utility model relates to the field of agricultural equipment, in particular to a powdered straw returning device.

Background technique

Crop straw is a very valuable biomass energy resource in the agricultural ecosystem, rich in nitrogen, phosphorus, potassium and other trace elements required for crop growth. Half of the photosynthetic products of crops are in the seeds and half in the straw. The total annual output of farmland straw in my country is as high as 800 million tons, of which about 300 million tons of straw are used for direct return to the field.

However, the current methods of returning straw to the field are mostly combined harvesters, and the returning straw is generally 5-10cm. In the early stage of returning to the field, the main organic components of straw, including lignin and cellulose, decompose slowly, which is not conducive to the release and utilization of nutrients. At the same time, the planting system of two or more crops a year in most areas of my country makes the number of straw returning to the field large and the interval short, which exceeds the soil absorption capacity. The phenomenon of "holes" in the soil of the farmland plough layer due to the accumulation of straw in a short period of time. The seed germination of the stubble crops and the rooting of the seedlings will affect the crop yield. In addition, when the straw is returned to the field, it carries a large number of insect eggs, which makes the next crop vulnerable to insect damage.

In recent years, the method of physically processing straw to the millimeter level and returning it to the field has been proposed. However, due to the high cost of straw transportation and processing, it is difficult to apply powder straw to the field on a large scale. In addition, after the straw is returned to the field, it needs to use soil microorganisms to help itself decompose, and in the process, it needs to consume a lot of soil basic nitrogen to maintain the reproduction of microorganisms.

Utility model content

In view of this, the purpose of this utility model is to overcome the defects in the prior art, and to provide a powdered straw returning device, which has a simple structure and can further pulverize the straw that has been initially pulverized by the combine harvester, and returns to the field after being screened by a screen. field.

The pulverized straw returning device of the utility model includes a device main body and a pulverizing mechanism. The device main body is provided with a pulverizing cavity, and the pulverizing mechanism includes a driving motor and a rotating shaft driven by the driving motor. A crushing blade is provided, a discharge port is provided on the main body of the device, a screen mesh is provided at the discharge port, and a screen cleaning member is driven and connected to the rotating shaft, and the screen cleaning member is driven to stick to the inner wall of the crushing cavity and The screen rotates.

Further, the main body of the device is provided with a feed pipe communicating with the crushing cavity, and a one-way opening gate is provided at the outlet of the feed pipe of the crushing cavity.

Further, the screen cleaning member is flexible and deformable.

Further, the screen cleaning element is a chain, and the chain is wound in a ring shape and connected to the upper end of the rotating shaft.

Further, the crushing cavity is a spherical cavity.

Further, a screen cleaning piece is fixedly arranged on the screen cleaning member.

Further, an auxiliary material machine is arranged on the main body of the device, and an auxiliary material inlet connected to the outlet of the auxiliary material machine is opened in the pulverizing cavity.

The beneficial effects of the utility model are as follows: the powdered straw returning device disclosed by the utility model can pulverize the straw in the pulverizing cavity through the pulverizing mechanism, and screen through the screen, and meanwhile, a cleaning element is also provided, The straw docked on the screen is cleaned so that it will be pulverized by the pulverizing mechanism again, so the pulverization degree of the straw is high, and the screen is not easy to be blocked.

Description of drawings

Below in conjunction with accompanying drawing and embodiment, the utility model is further described:

Figure 1 is a schematic structural diagram of the utility model.

Reference numeral description: device main body 100, crushing chamber 101, feeding pipe 102, one-way opening gate 103, auxiliary material machine 104, auxiliary material inlet 105, moving wheel 106, connecting piece 107, screen 108, driving motor 201, rotating shaft 202 , the crushing blade 203 , the screen cleaning piece 204 , and the screen cleaning piece 205 .

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

As shown in FIG. 1 , a powdered straw returning device in this embodiment includes a device main body 100 . The device main body 100 is connected to the combine harvester through a connector 107. The device main body 100 has a pulverizing cavity 101 and a feeding pipe 102 communicating with the pulverizing cavity 101. In order to connect various types of combine harvesters, the feeding pipe 102 Using a plastic hose with a variable diameter at the top, the main body 100 of the device is provided with a pulverizing mechanism. The pulverizing mechanism includes a driving motor 201 installed outside the main body 100 of the device and a rotating shaft 202 connected to the output end of the motor. The rotating shaft 202 extends into the pulverizing cavity In 101, the shaft body is connected with a crushing blade 203, the crushing chamber 101 is provided with an outlet, and a screen 108 is provided at the outlet. In the actual implementation process, the preliminarily crushed straw is fed into the crushing chamber by the combine harvester through the feeding pipe 102. 101. The crushing blade 203 driven by the rotating shaft 202 further crushes the straw, and the crushed straw is filtered by the screen 108 and discharged back to the field. The screen 108 is preferably connected and fixed in a detachable manner, which is convenient for replacing the screen 108 and adjusting the size of the screen holes. Of course, a screen 108 with a screen hole adjustment function can also be used. It can be pulled forward by the combine harvester.

In this embodiment, a screen cleaning member 204 is arranged in the crushing chamber 101 to clean the large grain straw accumulated on the screen 108. The screen cleaning member 204 is drivingly connected with the rotating shaft 202 and rotates together with the rotating shaft 202. The cleaning element 204 of the wall agitates the straw that is close to the inner wall of the crushing chamber 101 and accumulated on the screen 108 . Avoid incomplete crushing of straw and clogging of screen holes.

In some embodiments, the screen cleaning member 204 may be a rigid rod-shaped member. As a more preferred embodiment, the screen cleaning member 204 adopts a flexible and deformable structure, such as a chain, which is wound in a ring and connected to the rotating shaft At the upper end of 202, the chain is driven by the drive motor 201 and can be rotated clockwise or counterclockwise. During the rotation process, it automatically sticks to the wall under the action of centrifugal force, collides with the straw, and throws the straw again. In order to increase the throwing effect, a cleaning screen is set on the chain. The sheet 205 increases the impact area with the straw particles.

In order to adapt to the deformation of the chain during the rotation process and make the chain as close as possible to the wall, the crushing chamber 101 is designed to be spherical, and a one-way opening gate 103 is set at the outlet of the feeding pipe 102 of the crushing chamber 101. It is opened by gravity pressure, and closed by spring contraction after feeding, to prevent the thrown straw particles from flying out.

In another embodiment, the screen cleaning member 204 is drivingly connected with the rotating shaft 202 through a deceleration mechanism, so that the rotation speed of the screen cleaning member 204 is reduced to a certain extent.

The drive motor 201 is electrically connected with a speed control controller, so that the speed of the drive motor 201 can be adjusted as required.

The main body 100 of the device in this embodiment is further provided with an auxiliary material machine 104 for adding fertilizers or microbial inoculants. During the pulverization process, it is thrown into the pulverizing cavity 101 according to the set speed, mixed with the powder straw to make a compound fertilizer and returned to the field.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should The technical solutions are modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and all of them should be included in the scope of the claims of the present invention.

Claims (8)

1. A powdered straw returning device, comprising a device main body and a pulverizing mechanism, wherein a pulverizing cavity is arranged in the device main body, and the pulverizing mechanism includes a driving motor and a rotating shaft driven by the driving motor, and the rotating shaft is provided with a The crushing blade is characterized in that: the main body of the device is provided with a discharge port, a screen mesh is provided at the discharge port, and a screen cleaning member is driven and connected to the rotating shaft, and the screen cleaning member is driven to stick to the crushing cavity. The inner wall and the screen rotate. 2 . The powdered straw returning device according to claim 1 , wherein the main body of the device is provided with a feeding pipe that communicates with the crushing cavity, and a unidirectional outlet is provided at the outlet of the feeding pipe of the crushing cavity. 3 . Open gate. 3 . The powdered straw returning device according to claim 1 , wherein the screen cleaning member is flexible and deformable. 4 . 4 . The powdered straw returning device according to claim 3 , wherein the screen cleaning member is a chain, and the chain is wound in a ring shape and connected to the upper end of the rotating shaft. 5 . 5 . The powdered straw returning device according to claim 4 , wherein the pulverizing cavity is a spherical cavity. 6 . 6. The powdered straw returning device according to any one of claims 1-5, wherein a screen cleaning piece is fixed on the screen cleaning member. 7 . The powdered straw returning device according to claim 6 , wherein an auxiliary material machine is arranged on the main body of the device, and an auxiliary material inlet connected to the outlet of the auxiliary material machine is opened in the crushing chamber. 8 . 8 . The powdered straw returning device according to claim 7 , wherein a moving wheel is arranged at the bottom of the main body of the device, and a connecting piece is arranged at the front end. 9 .

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