DE2927383A1 - METHOD FOR SEALING COLUMNS BETWEEN A MOVING PART AND A FIXED PART ON ARMORED VEHICLES - Google Patents

Description

927383

The invention relates to a method for sealing gaps between a movable part and a fixed part on armored vehicles against incendiary agents and NBC warfare agents as well as an armored vehicle.

Between the hatch cover and the tower roof of an armored vehicle results inevitably a gap, since the hatch cover cannot be fitted completely free of play into the opening of the gap. The same problem arises the other openings of the armored vehicle, in particular at the sighting means ducts. At the bottom of the hatch or the Tower roofs are generally provided with seals to meet the requirement for gas and water tightness can. On the surface However, the circumferential gap remains in its full width. As a rule, these "depressions" do not have an effect during combat operations negative, although NBC warfare agents as well as unburned incendiary agents penetrate and even collect there can. In the case of incendiary equipment, this can mean that the phosphorus-containing systems in particular change after opening the hatch or after pulling it out from corner mirrors ignite by renewed oxygen supply and fall burning inside the tank. ABC warfare agents can also be dragged into the interior from the gap, with chemical warfare agents in the interior being very difficult to detoxify. Even after decontamination or detoxification or decontamination of the tank, both the incendiary equipment and the NBC warfare agents were removed from the smooth surfaces, but not from the columns. Detoxification solutions containing warfare agents can also be found there, for example accumulate during the ignition process, which can also get into the interior of the tank and remain there, since they cannot be removed from the crevices with troop funds. Covering this column with cover elements is very costly because these must be adjusted without play, taking into account that the gas- and water-tight seal through the sealing element also

⁸⁶²⁶ 030063/0485

must be retained after a long period of operation. Instead of the rigid Covering elements could also be used with resilient systems, but adaptation work is also necessary here, although such systems have the disadvantage that they may be caused by material fatigue caused reduced gas and water tightness hardly occurs. A redesign of the breakthroughs in such a way that running all around Metal-to-metal fits are also very expensive. On already Such changes are hardly feasible for imported vehicles, since both the costs and the effort are higher than for all of them mentioned protective measures.

The invention is accordingly based on the object of a method to propose by means of which the mentioned column inexpensively and safely can be sealed.

The solution to the problem arises from the features of the Characteristic of the main claim, the sub-claims describe preferred embodiments.

According to the invention, it becomes a hardenable one in the gaps and joints Plastic mixture introduced. The hardening plastic sticks through Use a bonding agent on one side of the gap or joint. The opposite side was before pouring the gap with the plastic mixture provided with a release agent, so that the hardened plastic does not adhere to this side. Since the liquid plastic mixture differs slightly from case to case Fits contours exactly, becomes a good and precise fit after curing Seal achieved.

So much plastic mixture is filled in that the gap is completely is filled out. There is accordingly a on the outer surface smooth surface without gaps or depressions. The hardened art

⁸⁶²⁶ 0 300 63/0485

Mixture of substances should include both incendiary agents and ABC warfare agents as well as withstand the detoxification and decontamination agents. The plastic can also be filled with insulating materials. So that the plastic cannot flow downwards or an excessively large space is filled, a sealing tape was inserted for each embodiment so that only a certain volume is filled. Hardening plastics are used as plastics, products with elastomeric Properties are preferred.

There have been experiments with polyurethane, epoxy, polyester resin and with Silicone rubber carried out, and satisfactory results were obtained with all products. Even with very hard products, a perfect sealing of the column achieved. In the course of the experiments However, it was found that elastomeric products are more suitable, since these foreign bodies can escape to a small extent without breaking out. Due to the high temperature stress that was required, inter alia. Silicone rubber proved suitable. Through use of insulation material which has been incorporated into the plastic, with this mixture both filling the entire gap as Even if only a cover layer can be applied to unfilled material, the thermal stability could be improved. As an insulation material A lightweight aluminum ceramic was preferably used in the form of hollow spheres. Comparative research have shown that, even with pure plastics, only the top layer is damaged by fire fighting agents. An intrusion the fire fighting agent in the joint does not take place. for protection against NBC ordnance does not require the use of insulation material. For wider gaps, where no great flowability is required, such hollow spheres can be used as a cheaper filler will. The use of plastic foam in the joints is also possible, but the foam is closed rows have to be.

8626-C / Li 030063/0485

·? ■ · ■. 2327383

The accompanying drawings serve in conjunction with the following specific description to further explain the invention.

Show it:

1 shows a section of a conventional hatch seal prior to application of the method according to the invention;

2 shows the hatch seal according to a somewhat enlarged scale 1 after a plastic mixture has been introduced;

Fig. 3

to 5 with respect to FIG. 2 modified embodiments.

In Fig. 1, the previous structure of a hatch seal is shown. Included the gap 4 can be seen, which between hatch cover 1 and z. B. Tower roof 3 is formed, the gas- and liquid-tight seal is carried out by a seal 2 running all around.

About the penetration of incendiary substances or NBC weapons To prevent this, as shown in FIG. 2, the gap is covered with plastic 6 filled. An adhesion promoter 7 can be applied to one of the steel parts 1, 3 be, which the adhesion of the plastic 6 z. B. on hatch cover 1 improved. The opposite side is coated with a release agent before potting 5, which prevents the plastic from sticking to the steel.

In order to prevent the cavity 8 from filling up, as in FIG. 3 shown, a seal 9 can be inserted, 'which can be removed after the gap 4 has been poured. This seal 9 can - as shown in FIG. 4 - also inserted in the region of the cavity 8 so that the gap 4 formed between the steel parts 1 and 3 is full

⁸⁶²⁶ 0 30063/0485

-ft- lying ~ -

can be filled with plastic 6. The plastic 6 can be a heat insulating aggregate 13, e.g. B. mineral hollow spheres, attached. This aggregate can, as shown in FIG. 4, either be mixed homogeneously into the plastic or, as in FIG Fig. 5, only added to the plastic, 6 for the uppermost zone 10, so that the lower area is the sealing material without filler contains. The underlying plastic thus retains its properties, but is protected from the effects of heat and therefore also retains it after prolonged exposure to fire fighting materials, its elasticity and thus its high sealing capacity.

As indicated in Fig. 5, to improve the adhesion of the plastic on a steel surface - apart from the adhesion-promoting layer 7, too mechanical elements 11 which are attached to the steel surface in such a way that they reach into the seal 6 and additionally hold it in place, be used.

8626 030063/0485

Claims (1)

LIEDL, NÖTH. ZEITLER Patent attorneys
8000 Munich 22 ■ Steinsdorfstrasse 21-22 · Telephone 089/22 94 41 9. 10. IS / S. · Engineering office Dr. -Ing. Gerhard Hopp Marsstrasse 46, 8000 Munich 2 Method for sealing gaps between a moving part and a fixed part on armored vehicles Patent claims: f 1.) Method for sealing gaps between a movable part and a fixed part of armored vehicles against incendiary agents and NBC warfare agents, since you rch characterized that one of the gap (4) forming surface with a separating agent (5) for a hardenable plastic mixture (6) is treated, while the counter surface remains untreated or is provided with an adhesive (7) for the plastic mixture (6) that the parts (1, 3) are brought into their closed position, with - if necessary - the bottom of the gap (4) is sealed against leakage of the plastic mixture (6), further that the plastic mixture (6) is poured into the gap (4), whereby it adheres to the opposite surface after hardening. 2. The method according to claim 1, characterized in that the movable part is the hatch cover (1) A8626-C / W 030063/0485 and the fixed part around the tower roof (3) of the armored vehicle acts. 3. The method according to claims 1 and 2, characterized in that a plastic mixture is used, which according to forms a plastic with elastomeric properties after curing. 4. The method according to claims 1 to 3, characterized in that the plastic mixture substances are added, which deteriorate the heat conduction. 5. The method according to claims 1 to 4, characterized in that a plastic mixture is used, which a plastic J ^; ^ rt, which is resistant to chemical warfare agents and detoxification solutions. 6 Process according to Claims 1 to 5, characterized in that the adhesive is applied to the counter surface by an adhesive and / or be formed by mechanical adhesive elements. 7. The method according to any one of claims 1 to 6, characterized in that the bottom of the gap by means of a removable Seal (9) is sealed and that the gap (4) is filled up to its uppermost edge with the plastic mixture. 8. The method according to any one of claims 1 to 7, characterized in that the plastic mixture is a heat insulating Additive (13) is added. 9. The method according to claim 8, characterized in that that hollow mineral spheres are used as heat-insulating aggregate. ⁸⁶²⁶ 030063/0485 10. The method according to claims 8 and 9, characterized in that the aggregate only in the uppermost zone of the gap is added to the plastic mixture. 11. Armored vehicle, characterized in that c h η e t between the moving parts, e.g. the hatch cover (1), and a fixed part, e.g. the tower roof (3), inevitably resulting gaps sealed by means of a seal formed from plastic are, which is firmly connected to one of the parts, which extends to the surface of the armored vehicle and which is adapted to the shape of the gap is. 030063/0 485