SU443650A1 - A device for steam sterilization in a protected ground structure - Google Patents

Description

one

This invention relates to the field of agriculture.

A device is known for the sterilization of soil by steam in structures of a protected soil, made in the form of a harrow, with distribution pipelines to which hollow needles are attached to the bottom.

Before sterilization, the soil is loosened with a cutter to the depth of paring, then the steam harrow is pressed into the soil, connected to a steam source, after the soil is heated to the required temperature, the steam harrow is manually removed from the soil and transferred to the next section, and the heated soil section is manually covered with a tarpaulin , burlap or other materials.

The known device, however, has a low productivity, as the soil is sterilized with steam by hand, and the device also has a lot of weight and metal content.

The aim of the invention is to improve the performance of the device.

This is achieved by the fact that the steam distribution pipelines are made elastic in the form of hoses wound on coils, located on the transverse shaft of the self-propelled carriage, on the frame of which, along the track of the layout of the hoses, are mounted

for ensuring the vertical entry of the steam discharge needles into the soil.

For winding the hose onto the spools in several layers, the guides in front of the spools are made with a helical surface.

FIG. 1 shows the proposed device, side view; in fig. 2 - the same, with laying the hose on the spool in several layers, view in plan; in fig. 3-the same, with the laying of the hose on the spool in a single layer.

The device comprises a self-propelled trolley 1, a transverse shaft 2, steam distribution pipelines in the form of hoses 3, steam discharge hollow needles 4 mounted on the hoses, coils 5 for winding hoses 3, guides 6 for hoses 3, frame 7, clamping driven wheels 8 having a groove " but. Needle 4 has holes “b.

The device works as follows.

The steam distribution pipe-hose 3 in the working position is located on the soil surface, and the needles 4 are in the soil. One end of the hose 3 is plugged. The hose connected to the source of steam, steam enters through the needles 4 into the soil and heats it to the required temperature. The vertical distance from the soil surface to the end of the needle is 250 mm. Each needle 4 has two side

bore holes for steam passage; the end of the needle 4 is pointed and plugged.

Before operating the device, the hoses 3 are wound on the coils 5. During the forward movement of the trolley 1, the coils 5 (Fig. 1) are driven by an electric drive, and the rubberized hoses 3 with attached hollow needles 4 unwind and pass through the guides 6, which ensure the position of the hollow needles in the vertical plane and the ingress of rubberized hoses 3 into the groove of the pressure follower wheels 8, by the action of the latter hollow needles 4 are buried in the soil. After laying the rubberized hose 3 onto the soil surface, i.e., after bringing it to the working position, steam is supplied to it through ing. versti "hollow needle 4 used in the soil. After the soil is heated to the required temperature, the carriage I is directed in the opposite direction, the coils 5 rotate also in the opposite direction, winding rubberized hoses 3. The hose 3 is rolled onto the coil 5 in two ways:

when winding the hose onto the coil in several layers, the hollow needles 4 (Fig. 2) with the help of helical guides 6 lie along the axis of the coil 5;

when winding the hose 3 onto the reel 5 in one layer, the needle 4 (Fig. 3) is arranged along the normal to a cylindrical surface.

In both cases, when the soil surface touches the end of the needle 4, the latter will be in a plane perpendicular to the surface of the plot.

In the first case, this is achieved by the fact that the guide 6 in front of the coil has a helical surface, as well as due to the torque on the hose 3 created by connecting it to the steam distribution device (the coil 5 being only in rotational motion).

In the second case, the needle 4 is constantly in the plane perpendicular to the soil surface, and in order for the hose 3 to unwind along a straight line, the coil 5 is not only in rotational motion, but also progressively moves in the direction of its horizontal axis.

It is possible to use in the device hoses 3 of different lengths with different pitch between the needles 4, but with a constant hose 3 along the length, i.e. it is possible to change the performance of the installation.

The number of hoses 3 on cart 1 may be different, depending on the source's steam capacity, the distance between the coils 5, and therefore between the hoses 3 laid on the ground, can also be changed.

Subject invention

Claims (2)

1. A device for the sterilization of soil by steam in greenhouses, including steam distribution pipes with leveling needles, characterized in that, in order to increase productivity, the pipelines are made elastic in the form of hoses wound on coils located on the cross shaft of a self-propelled cart, on the frame of which, along the track of the hose layout, guides are installed to ensure vertical entry of steam discharge needles into the ground. 2. A device according to claim 2, characterized in that, in order to wind the hose onto the spools in several layers, the guides in front of the spools are screw-shaped by the surface. / U //// ,, i five  five 3