DE2950662C2 - Pneumatic conveyor - Google Patents

Description

The invention relates to a pneumatic conveying device, in which the material to be conveyed Via a suction line of a blower from a warehouse the lower one, which is provided with a lower removal flap Space of a container divided by a sieve is supplied, while the conveying air from the upper one Container space is suctioned off.

Such conveyors for powdery or dusty goods, eg. B. plastics are known (GB-PS 10 70 161) and are used to periodically transfer the material from the space under the sieve via a To feed the bottom flap of a consumer point.

For removing dry stalks or leaves from a stock or for removing silage The known devices are from a silo and for the pneumatic conveyance of such goods into a cowshed not expedient, since the material is only fed to a single point, so that the distribution

Requires a lot of manual labor over long feeding courses.

To feed cattle in cow stalls, the only approach that has been taken so far is that the feed is closed to one another a line leading to a blower was fed by suction and then after passing through the blower was fed on the pressure side to a fixed point of the feed passage of a cowshed. There were handicrafts for distributing the feed and shredding the feed as it passes through the fan

ίο not to be avoided and caused by the compressed air The resulting air movements caused severe damage to the health of the cattle.

The object of the invention is therefore to prevent strong conveying air movements in cattle stalls and at the same time to achieve that dry stalks and leaves without any manual work can be fed to the cattle with gentle treatment. This task is mentioned in the introduction pneumatic conveying device solved by the characterizing features of claim 1.

As a result, the conveying air reaches the container space below the longitudinal dividing sieve by means of negative pressure, and the conveying air flows to the fan, which can be installed anywhere outside the cowshed, and into the Free, so that when the container separating the conveyed material is arranged in a cowshed, no stronger ones Air movements can occur. The conveyed goods never come with rotating parts the fan in contact, d. H. it reaches the container space practically undamaged without crumbling under the sieve, from which it falls down over the length or part of a length of a feed alley is removed as soon as the negative pressure in the space above the screen is lifted. That’s a Feeding the cattle in cow stalls without any manual labor enabled.

The invention is explained below with reference to the drawing. It shows
F i g. 1 shows a schematic longitudinal section through horizontal containers holding the feed with a connected suction fan,

F i g. 2 shows a cross section through one of the two horizontal containers according to FIG. 1.
According to the invention and the example, dry stalks or leaf material or silage is pneumatically fed via a suction line 1 to a horizontal container 2a extending over the length or part length of a feed alley of a cattle shed, which is passed through a sieve 3a into an upper space 4a and a lower space 5a is divided.

The feed is conveyed at one end into the lower space 5a of the container 2a in that the upper Container space 4a at the other end of the container leading to the fan 7 mounted at any point Suction line 6 is connected.

The upper container space 4a is divided at appropriate intervals by hanging flaps 13, and accordingly of this subdivision is the bottom of the lower container space 5 a with suspended flaps 14 which are held in their closed position by counterweights 15 and / or by the negative pressure. The material to be conveyed is first fed to the end of the lower space 5a. When the filling reaches the place on which the first hanging flap 13a is located, this flap is indicated by the dashed line promoting air flow pivoted into the dashed position, so that then gradually the lower space 5a is filled. As well as the filling reaches the point that

corresponds to the last flap 13c, is swiveled out this flap 13c actuates a switch 16a, by means of which the fan 7 or its throttle is switched off in line 6 is closed. This removes the negative pressure in the container 2a, and the weight of the material to be conveyed in space 5a pushes the flaps 14 down into the open position, so that the material is in the longitudinal direction can fall down distributed over the feeding alley.

In the case described, a container 2b can be connected in parallel in addition to the container 2u, e.g. B. for a second feed course, and then the connection of the conveyor pipe string 1 can be done by a switch 17 to the lower space 5a dos container 2a or to the lower Ra to 5b of the container 2b .

If, for example, the space 5a of the container 2a is filled with conveyed goods, the last hanging flap 13c actuates the switch 166, which is then in a circuit through which the switch 17 is switched over in order to be able to load the space 5b of the container 2b with conveyed goods . If the space 5b is filled with material, a switch 16Ö for switching the switch 17 is actuated again through the last hanging flap 13c and, under certain circumstances, the fan 7 is switched off at the same time or a throttle valve in the line 6 is closed, causing the negative pressure in both Containers 2a and 2b is lifted and the container spaces 5a and 5b are emptied via the bottom flaps 14a and 14 £> which then pivot downwards.

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Claims (3)

Patent claims: 1. Pneumatic conveying device, in which the material to be conveyed is fed via a suction line of a blower from a store to the lower space, which is provided with a lower removal flap, of a container divided by a sieve, while the conveying air is sucked out of the upper container space, characterized in, that for the removal and promotion of dry stalks or leaf material from a stock or of silage from a silo, the container (2a) extends horizontally in the longitudinal direction over a feed alley of a cowshed and the one below the sieve (3a) , closed at one end and At the other end, the space (5a, 5b ) connected to the suction line (1) has a floor made up of flaps (14, 14a) suspended one behind the other and closed by counterweights and / or the blower vacuum, while the top, at the other end, is on the suction side of the fan (7) connected space (4a, Ab) by hanging, by the negative pressure in the direction of the G ebläse evasive flaps (13a-13c), whose flap (13c,) which is furthest away from the fan (7) and which swivels after filling the lower space (5a) actuates a switch (t6a) to switch off the fan or a throttle in front of the fan . 2. Apparatus according to claim 1, characterized in that two containers (2a, 2b) designed according to claim 1 are each mounted above a feed alley, the upper spaces (4a, 4b) of the two containers (2a, 2b) with one End are connected to the suction side of the fan (7a) and the lower rooms (5a, 5b) on the other end can optionally be charged with the conveyed material from the silo or a haystack through a switch (17). 3. Apparatus according to claim 2, characterized in that the switch (17) for switching with two switches (16a, 16i>) cooperates in the upper spaces (4a, 4b) of the two containers (2a, 2b) with those hanging Flaps (13c ^ which are furthest away from the fan work together.