SE420076B - DOUBLE WALL TANK - Google Patents

Description

', as 152-0 the tank atmosphere from hot dishwashing liquid gets elevated temperature and increased steam intake to then cool rapidly. For pressure equalization to take place sufficiently quickly, the pressure equalization material must have sufficient cross-rivet area. As example It can be mentioned that for pressure tanks of about 50 m5 pressure equalization pipes have been used a diameter of the order of 150-200 mm. As a pressure equalization channel you have long for simplicity used a chimney-smelling opening at the top of the tank.

The disadvantages of this solution are obvious. Despite gallery elements and the like can not be prevented that particles from the surrounding atmosphere, small animals, etc. can penetrate and contaminate the tank contents. Furthermore, in geographical areas with cold seasons slight freezing in lattice elements or of channel openingzm.

The problem of pollution is, of course, particularly acute in food tanks, such as a milk tax outside a dairy premises. The frost problems also occur with such applications particularly noticeable due to “vapor- ooh condensate formation in in connection with frequent emptying and filling processes, and in particular from those intermediate washing cycle.

To remedy the aforementioned soiling and freezing problems, one has for tanks that are set up in connection with a user room suggested that arrange a connecting pipe from the top of the tank, either directly into the room or to a corridor at the 'bank's bottom. By corridor is meant in this context an arbitrary arrangement between the tank and the adjacent premises, towards the surroundings shielded connection, which can, for example, serve as a connection path between the room and a manluclca existing on the tank, as a culvert for wires between '' the tank and the room, for housing tankaruntwzr etc.

The relatively coarse pressure equalization pipe as well as the others outside the tank sr- required pipelines such as sink line and pipes for protection against overfilling requires for each tank application its individual connection work. For use places with cold seasons, the various pipes must also be insulated for prevention of freezing. ' The object of the present invention is to. a manufacturing economy advantageously eliminates said pipe pulling. think outside and reduce the connection work on. the application site with respect to. pressure equalization duct, possibly also sink line and overfill pipes.

This object has been achieved in a tank of the kind mentioned in the introduction, which tank is mainly characterized by the pressure equalization channel being arranged inside the insulation space existing between the inner wall of the tank and the outer casing and : 091162-6 " communicates at the top with the interior of the tank and at the bottom with said premises.

The required. relatively large cross-sectional area of the pressure equalization channel is thus obtained according to the invention by giving the cross section of the channel significantly greater extent in the circumferential direction of the storage space than across the perimeter wall of the tank and adapted to the shape of the tank so that the duct is completely housed inside the insulation space between the inner and outer jacket of the tank. Thus achieved also the manufacturing advantage of half the channel so. to say already are located through the inner wall and the rest of the channel surface of the channel is held by welding a simple sheet metal element to the tank wall along two essentially vertical edges. Other advantages and details of the invention are set forth in the following by way of example shown embodiment thereof, reference being made to the accompanying drawing, in which Fig. 1 shows a vertical section through an uninsulated tank at the installation site and Fig. 2 shows a cross section through the tank according to Fig. 1, however with additions of insulation ooh outer casing.

A tank Cross at the bottom via. a corridor 2 connected to a user room 5. The tank has a non-cylindrical inner wall 4 and one via dietan means 5, 6 mnt this arranged outer jacket 7, so that a cross-sectional insulating space 8 is formed between the inner wall 4 and the outer shell 7. In a connection within the corridor 2 sector CX located part of the annular insulation drain 7 is a plate element 9 fixed to the inner wall 4 along two. vertical edges and forming with said wall a narrow pressure equalization channel 10.

The pressure equalization channel 10 is open at the top into the tank via an inside of the tank. wall 4 occupied column 11, which extends along the whole. the width of the channel 10, and at the bottom open into the corridor 2 below the lower edge of the plate 9. For collection of possibly condensate and overflow liquid, a collecting gutter 12 has been designed of a sheet metal element fixed to the inner wall 4 of the tank. Hàlnnan 12 is drained by means a drainage line 15.

Inside the pressure equalization channel 10 has a line 14 for washing liquid. arranged, which leads up to the top of the tank to a spreader device (not shown).

As shown in Fig. 2, the pressure relief valve 10 has been made sufficiently narrow to make room for a barrel insulation layer between the channel and the outer casing 7.

In applications where not too low external temperatures occur, insulation ring fair. outside the pressure equalization kexal is dispensed with, when said channel in connection

Claims (6)

v as 1.6 2- o with the atmosphere in the user room and the interior of the tank itself offers sufficient insulation. The servo equalization duct can also be used to load other servio cables from the Q user room or the corridor to the top of the tank, such as electrical cables for lighting and level sensing. The pressure equalization channel with its elongated opening gap at the top of the tank and a collecting chute connected to a drainage pipe at the bottom also functions as an effective overfill protection. Petentkr-av i A tank with a substantially vertical circumferential wall comprising an inner wall (4) and a vie 'atetene eng (s, 6) outside this penetrating outer wall (7), after an ieeleringentnynne (s) nttllane nellen inner wall (14) een nzslget (7), which tank is intended to be set up outdoors and connected at the bottom to an indoor lane (3) or a combined one. down a tnyeknmanningekennl (m) for fönninarenae of the fact that underpressure or overpressure occurs in the storage state, e.g. at. washing of aeneenne, 1; e n n e t e e k n e <1 n v a said pressure detection coil (10) is arranged inside said insulating space '(8) and communicates at the top with the tanks not one neatm down nënae lekei (s). 2. A tank according to claim 1, characterized in that the cross section of the pressure equalization channel (10) has a considerably greater extent in the circumferential direction of the tank than across the said. perimeter wall. Tarxk according to claim Teller 2, characterized in that the pressure equalization channel (10) is formed by a part of said inner wall (4) and a sheet metal element (9) which is fixed to said inner wall along two. essentially vertical edges. A tank according to any one of the preceding claims, characterized in that a line (14) for dishwashing medium ooh / or other lines, such as cables for lighting een level / truth, than nannenanna inside the names tryekntjänningeunnl (10). Conceivable any of the foregoing, characterized in that the pressure equalization channel (10) is arranged to function as an overfill valve. A tank according to any one of the preceding claims, characterized in that it has the shape of a standing cylinder. ''