DE8209380U1 - FLOOR TENSIONING FRAME - Google Patents

Description

Floor tensioning frame

The invention relates to a floor tensioning frame made up of several |

vertically joined sections for the treatment of a *

Web with a heated, essentially circular ρ running gaseous treatment medium, part of which flows off via a heat exchanger, the energy of the outflowing part to a part flowing towards the circuit

feeds.

In well-known heat treatment devices with a plurality of treatment sections, the part to be removed is suction of the treatment medium through individual channels from the individual treatment zones of the device and fed to a central heat exchanger, which is followed by a fan that cools the consumed and cooled Releases treatment medium to the atmosphere. A quantitative part of the treatment medium to be removed The corresponding part of the medium is preheated in countercurrent via the central heat exchanger and a fan and the individual channels connected to it are fed back to the individual treatment zones.

For the heat treatment of a web of material, a device is already known to which several exhaust air heat exchangers are assigned are (DE-OS 27 19 67o). The heat exchangers are placed directly on the cover plate of the device, with one heat exchanger each for two or three sections of the device designed as a dryer is determined. tf

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In all known heat treatment devices with an external heat recovery system, this results from this required channel or line system sin great effort, which is increased by the fact that in addition to the circulation In addition, one central fan or even several in groups are already present in the individual treatment zones Fans combining sections are required, which require an appropriate installation room. Furthermore, fans, heat exchangers and the entire duct and pipe system must be carefully sealed in order to to separate the part to be removed from the part of the treatment medium to be supplied, otherwise the mode of action heat exchange is adversely affected by the loss of energy that can be recovered. Continue to have to the ducts and lines are well insulated, since their relatively large total surface in the absence of or Inadequate insulation would cause correspondingly large heat losses.

For a heat treatment device designed as a plan frame, it has therefore already been proposed that in each Treatment zone to integrate at least one heat exchanger, with which the inflowing part of the medium of the suction side a fan maintaining the media flow can be supplied (DE-GM 79 28 21o). Through one in the treatment device Integrated heat recovery system can have significant disadvantages compared to the devices avoid an external heat recovery system. It is omitted for example the extensive channels and lines for the part of the treatment medium to be discharged and supplied.

Furthermore, heat exchangers of constant size can be used and, by varying their number, the for a treatment zone required performance make a simple adjustment, so that a larger number and so that a cheaper production of the heat exchanger is made possible. The running cost of the device is up the drive power of an additional central fan is lower.

The invention is based on the object of providing a floor tensioning frame of the type described above with one Equip heat recovery system that the advantages of being equipped with an integrated heat system known heat treatment device can be adopted in the form of a plan frame.

Based on the floor tensioning frame described above, it is proposed to solve the problem that within each section on both sides one over the height of the section reaching exhaust duct is arranged, which with openings opening on each floor are provided, and that the exhaust air ducts on each side in a common collective exhaust air duct open, which leads to an integrated heat exchanger, to which a supply air duct is connected, via the supply air flows into the circuit of the treatment medium, while exhaust air flowing out of both heat exchangers via one each another exhaust duct enters a common additional collective exhaust duct.

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The inventive training it is also with one Floor tensioning frames possible, instead of a central external heat exchanger, two corresponding sections for each individual section to assign smaller heat exchangers, whereby significant disadvantages of the previously known device can be avoided. For example, the extensive channels and lines outside the device for the to be removed and supplied are omitted Part of the treatment medium. Instead, the floor tensioning frame according to the invention only requires at the end of the device a non-insulated exhaust air duct, which can be arranged on the machine ceiling. Furthermore you can Use heat exchangers of constant size, which are required by their number within the individual sections Performance are adjusted. This results in larger quantities, which means that the price for a heat exchanger is lower can be held. Finally, the operating costs of the device are lower, since the drive power for one no additional central fan is required.

According to one embodiment of the invention, the free cross section is the openings of the exhaust air duct which open on each floor can be changed by means of a slide, with each exhaust air duct connected downstream of the heat exchanger in the direction of flow a throttle valve is arranged, which is synchronized with one in each case arranged in the supply air duct and is proportionally adjustable.

The inventive design, the fresh air and exhaust air flaps are adjusted together, which ensures that

that with each setting a constant ratio between the amount of exhaust air and the amount of supply air is established. This Ratio is particularly important for the optimal efficiency of the heat recovery system.

According to a further embodiment of the invention, those arranged upstream of the heat exchanger in the direction of flow run Collective exhaust air ducts in the area of the tenter frame floor are preferred under this and extend over the length of the clamping frame.

According to a further embodiment of the invention, each is preferably downstream of the heat exchanger in the direction of flow The connected exhaust air duct with the supply air duct is arranged on both sides at the end of the clamping frame.

To further improve the heat exchange effect, an embodiment of the invention finally provides that each exhaust air duct and the respective supply air duct connected downstream of the heat exchanger in the direction of flow Form part of their pipe wall together, so that in the flow direction of the exhaust air behind the heat exchanger further residual heat exchange can take place.

In the drawing is an embodiment of an inventive Floor clamping frame shown. Show it:

Fig. 1 is a cross section; FIG. 2 shows a longitudinal section and FIG. 3 shows a plan view.

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A web of material 1 runs through rollers 2 by 180 ° each time deflected, several sections 3 of the device equipped with an insulated housing 4 in layers.

Each section 3 is assigned an exhaust air duct 5 extending over the height of the device on both sides. As In particular, FIG. 3 shows, the amount of the treatment medium sucked out of the device can be controlled by slides be dosed.

The treatment medium flows through the exhaust air ducts 5 each side of the device down into a common collecting exhaust air duct 7, which is in a foundation base 8 of the Device is cast. The treatment medium arrives at two corner areas via the collective exhaust air duct 7 Device end and flows there - as FIG. 1 in particular shows - from bottom to top through a respective lint filter 9 and then through a heat exchanger 1o, passes a cross section that can be regulated via a throttle valve 11 Another exhaust air duct 12 and arrives via a collective exhaust air duct 13 to an exhaust air fan, not shown.

The treatment medium to be supplied as fresh air is on both sides of the device via fans 14 on the Blown into the ceiling of the housing 4 and flows through an air inlet duct 15 in which a throttle valve 16 is arranged, Via a lint filter 17 transversely to the exhaust air flow through the heat exchanger 1o further into the interior of the device.

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The heat exchangers 1o consist - as FIG. 3 in particular shows - of similar modules 18, the number of which varies according to the size of the device. The modules 18 can be just as convenient as the fluff filters on the exhaust air and fresh air sides 9 and 17 can be removed from the device for cleaning.

The connected in parallel above the heat exchanger Io Exhaust air ducts 12 and supply air ducts 15 together form a part 19 of their duct wall, whereby an additional Heat exchange is made possible.

A coupling member 2o connect the throttle valves 7 and 9 so that a common adjustment of these valves is guaranteed is. This ensures a constant ratio between the amount of exhaust air and the amount of incoming air, so that a optimal efficiency of the heat recovery system can be achieved.

Claims (5)

1. Etagenspannraen from several vertically joined sections (3) for the heat treatment of a web (1) with a heated, essentially circulating gaseous treatment medium, part of which is passed through a Heat exchanger (Ίο) flows away, the energy of the flowing out Part of a part flowing into the circuit, characterized in that within each section (3) to an exhaust duct (5) reaching over the height of the section is arranged on both sides, which is on each floor opening openings, and that the exhaust air ducts (5) on each side open into a common collective exhaust air duct (7) which leads to the integrated heat exchanger (1o) leads, to which a supply air duct (15) is connected, via which supply air flows into the circuit of the treatment medium, while exhaust air flowing out from both heat exchangers (1o) enters a common one via a further exhaust air duct (12) each another collective exhaust duct (13) arrives. 2. Floor tensioning frame according to claim 1, characterized in that the free cross section of the opening on each floor The openings of the exhaust air duct can be changed by means of a slide (6) is and that in each downstream of the heat exchanger (1o) connected exhaust air duct (12) one Throttle valve (11) is arranged, each with a flap (16) arranged in the relevant supply air duct (15) synchronously and proportionally adjustable. 3. Floor tensioning frame according to claims 1 and 2, characterized characterized in that the collective exhaust air ducts (7) arranged upstream of the heat exchangers (1o) in the direction of flow run in the area of the tenter frame base, preferably below it, and extend over the length of the tenter frame. 4. floor tensioning frame according to claims 1 to 3, characterized in that each in the flow direction behind the Heat exchanger (1o) connected exhaust air duct (12) with the supply air duct (15) arranged on both sides at the end of the clamping frame is. 5. floor tensioning frame according to claims 1 to 4, characterized characterized in that each exhaust duct (12) and the exhaust air duct (12) connected in the flow direction behind the heat exchanger (1o) each supply air duct (15) jointly form a part (19) of their duct wall.