FR2605988A1 - TRANSPORT CONTAINER FOR LIQUID CHEMICALS - Google Patents

Abstract

THE INVENTION RELATES TO A CORROSION-RESISTANT STEEL TRANSPORT CONTAINER FOR LIQUID CHEMICALS. IT CONTAINS IN AN UPPER WALL 6 A CLEANING OPENING 7 WHICH IS CLOSED BY MEANS OF A REMOVABLE COVER 9. IN THE COVER 9 IS PROVIDED, NEXT TO A GAS INLET TUBING 20, A THREADED TUBING CENTERED BY WHICH A PLUNGER TUBE PENETS DOWN TO THE BOTTOM OF THE CONTAINER; THE LOWER END 24 OF THE PLUNGER TUBE IS ENGAGED, WHEN THE COVER 9 IS FITTED, IN A GUIDING OPENING 25 OF A SHEET 26 WHICH IS FIXED BY WELDING ON THE LOWEST ZONE 4 OF THE BOTTOM 3 OF THE CONTAINER; THUS THE DIVER TUBE IS PROTECTED AGAINST LATERAL FORCES THAT MAY BE PRODUCED DURING TRANSPORT BY THE MOVEMENT OF THE LIQUID CONTAINING IN THE CONTAINER; A PROTECTIVE COVER 27 IS PLACED REMOTELY ABOVE THE COVER 9 AND PROTECTS ALL THE FITTINGS AGAINST IMPURITY AND MECHANICAL DAMAGE DURING TRANSPORT.

Description

The present invention relates to a steel transport container

  resistant to corrosion for liquid chemicals, comprising at least one gas inlet pipe and a tubing outlet pipe extending to the lowest point of the bottom of the vessel. Such transport containers are designed in many cases for liquid chemicals which are subject to very strict conditions as to their purity. As long as the discharge of the liquid does not take place in an outlet provided in the bottom, it is necessary, both in the case of transport by suction pump and in the case of transport by gas under pressure, which tends to avoid wear particles in such applications, to use a plunger tube that extends

  to the lowest point of the bottom of the container.

  Particularly in the case of large transport containers, the movements of the liquid occurring during transport exert significant lateral forces on the dip tube. These stresses can cause, in many cases, that the fixation of the dip tube on the top wall of the container is altered. Because the forces occurring during transport are largely uncontrollable and must be avoided

  damage to the attachment of the dip tube to prevent

  expensive out of the often harmful chemicals, the dip tube is, in many cases, installed immediately

  after the transport for the purpose of discharging the contents of the

  transport. In this respect, it is often necessary to open the transport container so that impurities

  can enter this one. A rigid dip tube

  in the container could reduce the possibilities

of cleaning.

  The purpose of the invention is therefore to arrange a tube transport container defined above so that the obligation to subsequently install a dip tube in the container is removed, that the dip tube is also in progress. in the container is protected against the risk of damage by the liquid moving during transport and that the container can be opened for cleaning without

  the dip tube creates disturbances in this regard.

  This problem is solved according to the invention, thanks to the gas inlet inlet and the connecting pipe of the dip tube are disposed in a removable cover, which closes a cleaning opening in a top wall of the container, in that a hood protective cover covering the lid on all sides and at a distance is separably installed on the upper wall of the container and in that the lower end of the dip tube is engaged with the possibility of extraction in a guide opening in a guiding component arranged at a distance above the lowest point of the bottom of

container and attached to it.

  Due to the lateral support of the lower extremity

  the plunger tube on the guide component, which is advantageously a sheet metal splice welded at both ends to the container bottom, the plunger tube can not be deformed by the forces exerted by the liquid during transport. An alteration of the fixing of the dip tube in the area of the connection pipe is thus excluded. Because the dip tube is only engaged in the guide opening, it is possible, after loosening the lid, to remove it at the same time as the latter. The interior volume of the transport container is then easily accessible through the large opening

of cleaning.

  Because the gas inlet manifold and the plunger tube are disposed in the lid, the transport container can also be used with different chemicals when the

  pipe connections of these pipes are made differently

  for the corresponding chemicals, ie

  say are coded for these. It is then sufficient to

change the lid.

  The top protective cover provides effective mechanical protection against damage and impurities for all connections on the cover as well as for the cover and its fasteners themselves. It can be easily removed so that all necessary fittings for filling or unloading are easily accessible. According to other advantageous features of the subject of the invention: - the plunger tube is guided outwardly by a threaded closure and is connected thereto, which is removably screwed onto a threaded pipe disposed centrally; on the lid; the lid has a folded edge, containing a sealing ring, which hooks onto an upwardly directed marginal flange of the cleaning opening; on the periphery of the lid are distributed clamping bolts which are connected to the upper wall of the container

or at the marginal collar.

  Other features and advantages of the invention will be highlighted later in the

  description, given by way of non-limiting example, in

  Referring to the accompanying drawing, in which: Figure 1 shows in side elevational view and partly in section a transport container for liquid chemicals, and Figure 2 is a sectional view on an enlarged scale in

an area of the lid.

  The transport container shown in the drawing is for the transport and storage of high purity liquid chemicals, such as those required by

  example for the manufacture of electronic components.

  In a frame 1 is received a tank 2, which comprises in a bottom of the container 3 an outlet 5 placed in a recessed place 4. In an upper wall 6 of the container, there is provided a cleaning opening 7 whose edge is formed

  by a marginal flange 8 directed upwards.

  A cover 9 capable of closing off the cleaning opening 7 has a folded edge 10 which contains a resilient sealing ring 11. The sealing ring 11 also bears against the upper edge of the marginal collar 8, which is surrounded by the flanged edge 10. Clamping bolts 12 distributed on the periphery of the cover 9 are made as eyelet bolts and are each mounted so as to be folded into a support 13 which is installed on the outside of the flange. marginal 8. The clamping bolts 12 can be tilted and clamped in forked supports 14, which are distributed on the periphery of the cover 9. Thus the cover 9 is sealingly applied against the marginal collar 8. In the cover 9 at the center is a threaded pipe 15 on which is screwed a threaded closure 16. In the threaded closure 16 is fixed by welding or brazing a pipe of connection 17 of a dip tube 18 protruding vertically downwards and which, during transport, is closed sealingly to the

using a threaded cap 19.

  Laterally remote from the threaded pipe 15, there is provided a gas inlet pipe 20 welded into the cover 9 and which, during transport, is also sealingly closed by means of a threaded cap 21. another connection pipe 23, also closed by means of a threaded cap 22, can be arranged on the other side of the

cover 9.

  The plunger tube 18 is engaged by its lower end 24 in a guide opening 25 of a sheet metal plate 26, which is welded at both ends to the bottom 3 of the container and is slightly curved upwardly above the container. the lowest zone 4 of the bottom 3 of the container. The sheet metal plate 26 constitutes a guide component for the dip tube 18. When the cover 9 is put in place, the lower end 24 of the dip tube 18 is engaged in the guide opening 25. When the liquid contained in the transport container moves during transport, the forces exerted by the liquid on the dip tube 18 are absorbed not only by the fixing portion of the dip tube 18 in the threaded closure 16 but also by the sheet metal plate 26 so that the bending stress of the plunger tube 18 remains low. An upwardly bulging protective hood 27 is disposed on all sides at a distance above the cover 9 and the connections provided therein. The protective cover

  is supported by means of an elastic sealing ring

  28 against a collar 29 which remotely surrounds the marginal collar 8 of the cleaning opening 7. A clamping ring 30, provided with a separable closure, presses the edge of the protective cap 27 in a sealed manner against the collar 29 All the connecting and closing parts of the transport container are protected against contamination and mechanical damage by the protective cover 27. During filling and before emptying the transport container, the protective cover 27 is removed so that all

  fittings are freely accessible.

  The transport container and all connecting parts which come into contact with the received liquid are made of corrosion-resistant steel. The sealing rings 11 and 28 as well as the seals placed in the threaded closures 19, 21 and 22 are made of plastic, which is inert with respect to the liquid received. By an asymmetrical arrangement of the fixing bolts 12 or by means of guiding components which are arranged on the cover 9 and on the upper wall 6 of the container, it can be made sure that the cover 9 can be put in place only in a defined position and

  predetermined. This prevents the permutation of the connections.

Claims (4)

  1. Corrosion-resistant steel transport container for liquid chemicals, having at least one gas inlet pipe and an outlet pipe of a dip tube extending to the lowest point of the bottom of the pipe. container, characterized in that the gas inlet pipe (20) and the connecting pipe (17) of the dip tube (18) are arranged in a removable cover (9), which closes a cleaning opening (7) arranged in an upper wall (6) of the container, in that a protective cover (27) covering the cover (9) on all sides and at a distance is separably installed on the upper wall (6) of the container and in that that the lower end (24) of the dip tube (18) is engaged with the possibility of extraction in a guide opening (25) in a guide component (26) arranged at a distance above the lowest point ( 4) Bottom of container (3) and fixed on it.   2. Transport container according to claim 1, characterized in that the guide component is a sheet metal splice (26) welded at both ends to the bottom (3) of the container.   A transport container according to claim 1, characterized in that the dip tube (18) is guided outwardly by a threaded closure (16) and is connected thereto, which is removably screwed onto a tubular   threaded (15) disposed centrally on the cover (9).   Transport container according to Claim 1, characterized in that the cover (9) has a folded edge (10) containing a sealing ring (11) which hooks onto a marginal flange (8) directed upwards, from the cleaning opening (7) and in that on the periphery of the cover (9) there are distributed clamping bolts (12) which are connected to the upper wall (6) of the   container or at the marginal collar (8).