DE102009050428A1 - Blasting material storage - Google Patents

Abstract

The invention relates to a blasting agent storage device with a plurality of buffer containers for storing blasting agent, each of which has at least one inlet for filling with blasting agent and at least one outlet for supplying a blasting agent accelerating device with stored blasting agent, the buffer containers being arranged offset in height and at least one buffer container having an overflow the abrasive overflowing when filling the buffer tank flows into a lower-lying buffer tank under the influence of gravity.

Description

The invention relates to a blasting medium storage for blasting equipment, in which for surface treatment abrasive is directed at high speed on workpieces. In particular, stationary blast machines usually have a blasting agent circuit with a blasting agent storage in order to reduce the blasting agent consumption by reuse of the blasting agent.

From the blasting agent storage blasting agent is directed by gravity through lines to one or more blast accelerating devices, which then accelerate the abrasive towards the workpiece. The blast accelerating devices may include, for example, blast wheels or blast systems operated by compressed air.

The blasting agent is collected after impact with the workpiece and transported by means of transport components, such as screw conveyors, conveyor belts, vibrating conveyor troughs, vibrating conveyor tubes or bucket elevators, to various processing units to be cleaned and reprocessed for reuse. Such processing units include, for example, pneumatic screening, screening equipment and grain-forming sorting equipment.

The cleaned blasting agent is finally fed back to the blasting agent storage. Caching in the blasting media store is particularly necessary to bridge the time delay that arises between the beginning of the blasting process and the provision of the recycled blasting media for reuse. The blasting agent storage serves, so to speak, as an intermediate storage, in order to ensure that all blasting agent consumers are supplied without interruption with purified blasting agent.

Conventional blasting agent storage, as z. B. off DE 33 38 980 C2 are known are formed as a simple solid, which are usually located above the highest Strahlmittelbeschleunigungsvorrichtung. Due to the force of gravity, the blasting medium reaches the blast-medium accelerating devices via a plurality of processes arranged at the bottom of the blasting agent reservoir and hose lines connected thereto.

In blasting medium stores which supply a larger number of consumers, several, mostly juxtaposed outlets are provided, often an elaborate distribution of the blasting agent storage supplied blasting agent is provided by pivotable blasting media slides or screw conveyors to always at high Abrasive flow rates and / or low blasting medium level ensure uninterrupted supply of all outlets with blasting media. In particular, it is intended to prevent a bulk cone from forming in the blasting agent accumulator which reliably supplies blasting media located close to the blasting medium inlet, but not more distant outlets.

A continuous blasting agent supply to all consumers is important, since even a short interruption of the blasting medium supply of individual blasting medium accelerating devices would lead to an uneven blasting result that subsequently becomes difficult to correct.

It is therefore an object of the invention to provide a blasting agent storage, which ensures a reliable and continuous supply of all connected Strahlmittelbeschleunigungsvorrichtungen with blasting.

The object is achieved by the features of claim 1 and in particular by a blasting agent storage with a plurality of buffer tanks for storing blasting agent, each having at least one inlet for filling with blasting agent and at least one outlet for supplying a Strahlmittelbeschleunigungsvorrichtung with stored blasting agent, wherein the buffer tank offset in height are arranged and at least one buffer tank has an overflow, flows over the overflowing during the filling of the buffer tank blasting agent under the influence of gravity into a lower-lying buffer tank.

In the case of the blasting agent storage device according to the invention, therefore, conditioned blasting agent flowing in initially passes into a first buffer vessel. As soon as this buffer container is filled, the overflowing blasting medium flows under the influence of gravity into a lower-lying buffer container. Depending on the number of buffer tanks, this process is repeated until all buffer tanks are filled. The cascade-shaped arrangement of the buffer container ensures that there is always sufficient blasting medium available to supply all the blast accelerating devices connected to the outlets. It is understood as a matter of course that over a longer period of time the blasting agent amount flowing to the blasting agent storage is not or only insignificantly smaller than the blasting agent amount delivered to the blasting agent consumers via the entirety of the outlets.

At the beginning of a blasting process, in which the blasting abrasive used has not yet gone through all the treatment stages and for another Use is available, or in a short-term interruption of the supply of the blasting agent storage with treated blasting agent to ensure the buffer container that all blast accelerating devices continue to be supplied at least for a certain time evenly with blasting agent.

All buffer containers of the blasting agent storage can have the same volume. However, it is also possible to use buffer containers of different volumes to accommodate different-use blasting media accelerating devices, with the buffer containers adapted to consumption such that the maximum buffering period is approximately equal for all the blast accelerating devices.

In principle, the buffer container volume can also be chosen to be greater, the deeper the relevant buffer container is arranged in the cascade. Thus, the certain time delay in refilling the buffer container can be taken into account, since due to the cascade arrangement, the higher-lying buffer container are first filled.

Another advantage of the cascaded arrangement of the buffer container in the blasting medium storage according to the invention is that with a height-staggered arrangement of the blasting means acceleration devices higher consumers with higher-lying buffer tanks and lower consumers can be connected to lower-lying buffer tanks. This shortens the length of the hose feed lines, in particular for the lower-lying consumers, and the trickling speed of the blasting medium in these hose lines is considerably reduced, so that the service life of these hose lines is significantly increased. In addition, there is an approximation of the buffer volumes, since ultimately the volume stored in the hose lines must be added to the buffered blasting agent volume.

Finally, with the blasting medium storage device according to the invention, a substantial reduction in the overall height of the blasting installation can be achieved. While in conventional blasting agent storage the entire storage volume must be located above the highest consumer, it is sufficient in the blasting medium storage according to the invention, if only a partial volume, namely the volume of the highest buffer container is located above the highest consumer.

According to an advantageous embodiment of the invention, part of the buffer containers are associated with a first group of buffer containers and another part with the second group of buffer containers horizontally spaced from the first group, the buffer containers of each group being vertically stacked and the groups being vertical Direction are offset from one another in such a way that overflowing abrasive flows from a buffer tank of a group to a immediately below this arranged buffer tank of the same group via a buffer tank of the other group. The blasting agent flowing from a buffer container of one group to a buffer container of the same group arranged directly below it takes a detour via a buffer container of the other group. In this arrangement, the flow path of the overflowing blasting agent, as it were, zigzags from one group of buffer containers to the other group. This makes it possible to achieve a particularly compact design.

Preferably, the overflow is designed such that during the filling of a buffer tank overflowing abrasive is directed in the direction of the inlet of the immediately below the buffer tank. This allows a simple construction of the blasting agent storage.

Advantageously, the inlet is formed by an opening provided at the top of the buffer container. If the overflow is formed by a recess of an edge delimiting the opening, in particular by a recess in a side wall, the buffer containers can be very easily manufactured.

Alternatively, the overflow of a buffer tank can also be connected via a line to a lower-lying buffer tank. This ensures that the overflowing abrasive reaches as completely as possible in the lower-lying buffer tank.

At least one buffer container preferably has the shape of a funnel. This ensures that the stored blasting agent can reach the outlet of the buffer tank solely by the action of gravity.

According to a further advantageous embodiment, the buffer containers are at least partially disposed in the interior of a collecting container, which preferably has at least one outlet for supplying a blasting medium accelerating device. In this embodiment, that blasting agent is collected, which is not completely absorbed by overflowing buffer containers when overflowing. In addition, the collecting container provides an additional buffer volume, so that the Spaces between the individual buffer containers can be exploited. This significantly increases the buffer volume. Via the at least one outlet of the collecting container further consumers can be supplied with blasting agent. In addition, this outlet allows complete emptying of the blasting agent storage.

According to another advantageous embodiment, a portion of the buffer container comprising the inlet within the collecting container and / or a section of the buffer container comprising the outlet is provided outside the collecting container, wherein in particular all buffer containers are arranged at least in sections in the collecting container. In this arrangement, as it were, the buffer containers penetrate an outer wall of the collecting container, so that the outlets of the individual buffer containers are accessible from the outside. This simplifies both the design and installation of the blasting media storage as well as its subsequent maintenance.

Further advantageous embodiments of the invention are specified in the subclaims, the description and the drawings.

The invention will be explained below with reference to an embodiment with reference to the drawings. Show it:

1 a perspective view of two mirror-symmetrical to each other formed buffer containers of a blasting agent storage according to the invention;

2 a perspective view of a blasting agent according to the invention in a semi-transparent representation; and

3 a cross section through a blasting agent storage according to the invention.

1 shows two buffer tanks 12A . 12B , which next to a collection container 26 Part of a blasting agent storage according to the invention 10 are ( 2 and 3 ). The mirror-symmetrical to each other formed buffer container 12A . 12B have a funnel-shaped shape and are made for example of sheet metal, in particular sheet steel.

Both buffer tanks 12A . 12B each include a floor 18 , which is horizontally aligned and an outlet 22 for the blasting agent. The outlet 22 can be connected by means of a hose line, not shown, with a Strahlmittelbeschleunigungsvorrichtung also not shown. To the ground 18 closes a sloping wall 20 at, which in the illustrated embodiment by about 45 ° relative to the ground 18 inclined obliquely upwards. On the two long sides of the inclined wall 20 as well as on the ground 18 are two side walls 14 . 16 attached.

From the sloping wall 20 spaced is a top wall 24 provided, which also on the ground 18 and the side walls 14 . 16 is attached. The top wall 24 is opposite the sloping wall 20 inclined so that the cross section of the buffer tank 12A respectively. 12B towards the outlet 22 rejuvenated.

A vertical surface made up of vertical edges of the sidewalls 14 . 16 and an upper edge of the top wall 24 is limited after installation in the sump 26 ( 2 ) through a portion of an end wall 28 of the collection container 26 completed.

The upper edges of the side walls 14 . 16 and the sloping wall 20 define together with the front wall 28 an inlet 30 for the blasting agent.

As in particular in 1 It is easy to see that is one side wall 14 shorter than the other side wall 16 so that the top edge of the sidewall 14 lower than the upper edge of the sidewall 16 , Will the buffer tank 12A . 12B now filled with blasting agent, so on reaching the maximum filling overflowing blasting agent always flows over the upper edge of the side wall 14 from the buffer tank 12A . 12B out. The upper edge of the side wall 14 So defines together with a partial area of the front wall 28 and the free portion of the one longitudinal edge of the inclined wall 20 a recess which forms an overflow for the excess abrasive and at the same time directs it in a desired direction.

Regarding 2 and 3 Now the arrangement of the buffer tank 12A . 12B in the substantially cuboid collecting container 26 and the operation of the blasting medium storage 10 explained in more detail.

At the bottom of the collection container 26 are also one or more outlets 22 intended. A lower section of the collection container 26 is for easier removal of abrasive 36 funnel-shaped.

The front wall 28 has a total of five passages 32 on, in each of which a buffer tank 12A respectively. 12B is arranged such that the respective passage 32 through an outer buffer container section 34 is completed. This outer buffer tank section 34 includes each the ground 18 with the outlet 22 , the top wall 24 and lower sections of the side walls 14 . 16 ,

The sloping wall 20 as well as the larger part of the side walls 14 . 16 as well as the inlet 30 are located inside the collection container 26 ,

Three buffer tanks 12A are vertically stacked on a front left side of the front wall 28 arranged and form a first group of buffer containers 12A , Two buffer tanks 12B are vertically one above the other on the right side of the front wall seen from the front 28 arranged and form a second group of buffer containers 12B , Thus, the overflows of the first group of buffer containers are located 12A on the right, while the overflows of the second group of buffer tanks 12B located on the left side. The overflows of one group are thus facing the overflows of the other group.

Furthermore, the two groups are buffer tanks 12A respectively. 12B Horizontally spaced from each other and arranged vertically offset from one another such that viewed in the vertical direction alternately a buffer container 12A the first group or a buffer tank 12B the second group in the front wall 28 is provided. So if you would connect a buffer tank with the nearest buffer memory by means of an imaginary line, the result would be a zigzag line.

Looking now in particular 3 , it becomes clear in what way the individual buffer tanks 12A . 12B with blasting medium flowing in from above 36 be filled. First, this flows to the blasting agent storage 10 supplied blasting agent 36 in the upper buffer tank 12A the first group of buffer containers 12A , Once this is filled, the now overflowing blasting medium flows 36 over the overflow, ie over the upper edge of the sidewall 14 , from the upper buffer tank 12A out and fall through the inlet 30 of the upper buffer tank 12B the second group of buffer containers 12B into this.

Even though this buffer tank 12B filled, the blasting medium flows 36 over its side wall 14 in the middle buffer tank 12A the first group of buffer containers 12A ,

The process is repeated accordingly, so that the lower buffer tank 12B and 12A be filled one after the other. As soon as the lower buffer tank 12A the first group of buffer containers 12A is completely filled, collects the overflowing blasting agent 36 finally at the bottom of the collection container 26 ,

To hold a larger amount of abrasive 36 at the end of the blasting process, when the blast accelerating devices are already switched off, but still processed blasting means 36 From the top flows into the blasting medium storage, the interior 38 of the collection container 26 be used for additional blasting media storage. That in the interior 38 of the collection container 26 stored blasting agents 36 can later depending on the level both on the buffer tank 12A . 12B as well as over or at the bottom of the collection container 26 provided outlets 22 be removed again.

As already mentioned above, the buffer containers shown here have 12A . 12B same volumes. However, it is also possible that the volume of the respective buffer tank 12A . 12B from top to bottom increases to compensate for the staggered filling of the buffer tank cascade.

Alternatively, the overflows of the buffer containers can also be connected via lines to the inlets of the respective lower-lying buffer containers, so that the buffer container cascade represents a closed system. In the case can be dispensed with a collecting container, as overflowing abrasive completely enters the lower-lying buffer tank.

LIST OF REFERENCE NUMBERS

10

Blasting material storage

12A, 12B

buffer tank

14, 16

Side wall

18

ground

20

scaling wall

22

outlet

24

top wall

26

Clippings

28

bulkhead

30

inlet

32

passage

34

Buffer tank portion

36

blasting agent

38

inner space

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 3338980 C2 [0005]

Claims (10)

Blast media storage, with several buffer containers ( 12A . 12B ) for storing abrasive ( 36 ), each having at least one inlet ( 30 ) for filling with blasting agent ( 36 ) and at least one outlet ( 22 ) for supplying a blasting medium accelerating device with stored blasting agent ( 36 ), the buffer containers ( 12A . 12B ) are arranged offset in height and at least one buffer container ( 12A . 12B ) has an overflow, over which during the filling of the buffer tank ( 12A . 12B ) overflowing abrasive ( 36 ) under the influence of gravity into a lower-lying buffer tank ( 12A . 12B ) flows. Blasting medium storage according to claim 1, characterized in that the buffer container ( 12A . 12B ) are arranged one above the other, wherein in particular in each case two directly superimposed buffer container ( 12A . 12B ) have a lateral offset from one another. Blasting medium storage according to claim 1 or 2, characterized in that a part of the buffer container ( 12A . 12B ) a first group of buffer containers ( 12A ) and another part of a second group of buffer containers horizontally spaced from the first group ( 12B ), the buffer containers ( 12A . 12B ) of each group are respectively arranged vertically one above the other and the groups are arranged offset from one another in the vertical direction in such a way that overflowing abrasive ( 36 ) from a buffer tank ( 12A ) of a group to a directly below this arranged buffer container ( 12A ) of the same group via a buffer container ( 12B ) of the other group flows. Blasting medium storage according to one of the preceding claims, characterized in that the overflow is designed such that during the filling of a buffer tank ( 12A . 12B ) overflowing abrasive in the direction of the inlet ( 30 ) of the immediately below arranged buffer container ( 12A . 12B ). Blasting medium storage according to one of the preceding claims, characterized in that the inlet ( 30 ) by a at the top of the buffer tank ( 12A . 12B ) provided opening is formed. Blasting medium storage according to claim 5, characterized in that the overflow through a recess of the opening bounding edge, in particular by a recess in a side wall ( 14 ), wherein the recess preferably the inlet ( 30 ) of an immediately adjacent buffer memory ( 12A . 12B ) is facing. Blasting medium storage according to one of claims 1 to 5, characterized in that the overflow of a buffer tank ( 12A . 12B ) via a line with a lower-lying buffer tank ( 12A . 12B ) connected is. Blasting medium storage according to one of the preceding claims, characterized in that at least one buffer container ( 12A . 12B ) has the shape of a funnel. Blasting medium storage according to one of the preceding claims, characterized in that the buffer container ( 12A . 12B ) at least in sections inside a collecting container ( 26 ), which preferably has at least one outlet ( 22 ) for supplying a blasting medium accelerating device with stored blasting agent ( 36 ) having. A blasting medium store according to claim 9, characterized in that the inlet ( 30 ) comprehensive section of the buffer container ( 12A . 12B ) within the collecting container ( 26 ) and / or an outlet ( 22 ) comprehensive section ( 34 ) the buffer container outside the collecting container ( 26 ), in particular all buffer containers ( 12A . 12B ) at least in sections in the collecting container ( 26 ) are arranged.

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