JPH0210907Y2 - - Google Patents

Description

[Detailed description of the invention] Conventionally, the sorting air passage communicating with the pressure fan was made up of a primary sorting air passage passing above the No. 1 receiving gutter and a secondary screening air passage passing below the No. 1 receiving gutter. It is already known that the filter has an upper and lower two-stage configuration to enhance the wind selection effect.

However, in this type of configuration, the slope of the secondary sorting air passage passing below the No. 1 receiving gutter cannot be made large, and especially the slope between the outlet of the pressure fan and the lower part of the No. 1 receiving gutter cannot be maintained. Since the bottom of the air channel has to be configured almost horizontally, if grains or straw waste left on the swinging sorting shelf accidentally fall due to interruptions in work, this will cause There was a problem in that the particles accumulated at the horizontal bottom of the air passage, blocking the air passage, weakening the wind speed and worsening the sorting effect.

The purpose of the present invention is to eliminate such problems before they occur. To achieve this purpose, a wind pressure sensing valve is installed at an appropriate location in the secondary screening air passage, and when the wind pressure decreases below a predetermined value, a wind pressure sensing valve is installed. This system detects air flow and notifies the operator of the problem, and detects blockages in the air passages due to accumulation of straw debris at an early stage, thereby preventing problems from occurring.

Below, one embodiment of the present invention will be described based on the drawings. 1 is a handling chamber in which a handling cylinder 2 is mounted on an internal shaft; a sorting chamber formed below the handling chamber 1 includes a swinging transfer chamber consisting of a grain pan 3 and a grain sheave 4; A sorting shelf 5 and a stroller rack 6 are arranged behind it.
Reference numeral 7 denotes a pressure air fan provided at the front of the sorting room, which sends pressure air to the swing transfer sorting shelf 5 and the stroke rack 6 through a sorting air path to be described later. 8 is the first receiving gutter, and 9 is the second receiving gutter.

The sorting air passage communicating with the pressure fan 7 is a primary sorting air passage 10 that passes above the first receiving gutter 8 and blows through towards the grain sieve 4 of the swinging transfer sorting shelf 5 rearward and upper from this. and a secondary sorting air passage 11 which passes below the first receiving gutter 8 and blows through towards the stroller rack 6 above, so that it is independently constructed into two upper and lower stages. The lower secondary sorting air passage 11 has a horizontal portion 11a between the discharge port 7a of the pressure fan 7 and the lower part of the first receiving gutter 8;
Slanted portion 11b extending rearward and upward from this horizontal portion
It is composed of:

Reference numeral 12 denotes a wind pressure sensing valve provided in the secondary screening air passage 11, which is suspended swingably around the pivot axis P at the inclined part 11b rearward from the horizontal part 11a of the air passage 11, When the wind pressure generated by the pressure fan 7 is maintained, the wind pressure sensing valve 12 is oscillated to the virtual line position, and the switch 14, which can be connected to the alarm lamp 13, is turned off. When the wind pressure weakens below a certain value, the switch 14 is turned on by moving away from the switch 14, and the alarm lamp 13 lights up to notify the operator.

Reference numeral 15 denotes a threshing clutch lever, which is continuously connected so that when the threshing clutch is turned on, a main switch 16 of the alarm circuit is turned on and the main switch 16 is turned on.

During the threshing operation, the threshed material is oscillatedly sorted by the oscillating transfer sorting shelf 5 and the straw rack 6 in the sorting room, and is further transferred from the pressure fan 7 to the primary sorting air path 10 and Secondary sorting air path 1
1 and is selected by the sorting wind that blows upward.

If work is interrupted due to trouble in the threshing section or sorting section, grains and straw waste remaining on the sorting shelves, straw racks, etc. may inadvertently fall into the secondary sorting air passage 11 and cause the problem. It may stay in the horizontal part 11a of the air passage 11. If work is started in such a state, the force of the sorting air will be weakened, which will worsen the sorting effect, but at this time, according to the present invention, a wind pressure sensing valve 12 is installed in the secondary sorting air path. This prevents the objects to be sorted from colliding with this, causing turbulence and causing sorting failures, and detects that the sorting wind has weakened, and, for example, turns on the alarm lamp 13. It is possible to turn on the light and report it to the operator, so that the operator can quickly detect the problem and take action to prevent trouble from occurring.

[Brief explanation of drawings]

The figures show one embodiment of this invention, in which Fig. 1 is a vertical side view of the thresher, Fig. 2 is a side sectional view of its main parts, and Fig. 3 is an alarm circuit diagram. 1 is a handling room, 5 is a swinging transfer sorting shelf, 6 is a stroke rack, 7 is a pressure fan, 8 is a first receiving gutter, 9 is a second receiving gutter, 10 is a primary sorting air path, and 11 is a secondary sorting. Air passage, 12 is a wind pressure sensing valve, 13 is a warning lamp, 14
indicates a switch.

Claims (1)

[Scope of utility model registration request] The sorting air passage from the pressure fan is made up of a primary sorting air passage that blows further backward and upwards through the upper part of the No. 1 receiving gutter, and a secondary sorting air passage that blows upward through the lower part of the No. 1 receiving gutter. A sorting device for a threshing machine constructed as above, characterized in that a wind pressure sensing valve connected to an appropriate alarm mechanism is provided at an appropriate position in the secondary sorting air path.