PIPING SYSTEM WITH VARIABLE CONFIGURATION

Abstract: A piping system has a variable configuration for spreading a fluid, suitably for extinguishing systems, emergency cooling systems and the like. The pipes (4, 5, 6, 7, 8) in the system do not have holes for branches, and are provided with pipe coupling (6, 7) of a type where the forced displacment of a cutting means provides an opening in a pipe to connect the pipe to a branch in the pipe coupling. The pipe couplings are provided with means (21) which are actuated for an abnormal state, said means (21) in turn activating the cutting means. As long as the piping system has not been given an abnormal state, the branches can be moved at will.

Description: PIPING SYSTEM WITH VARIABLE CONFIGURATION TECHNICAL FIELD The invention relates to a piping system with variable configuration for spreading a fluid, suitably in extinguishing systems, emergency cooling systems and the like. BACKGROUND ART In piping systems which branch out to form different configurations, the connections between the different pipe sections and between the means fed thereby, such as nozzles, must be made when the piping system is installed. Quite often, the placing partition walls is scarcely decided when a piping system, e.g. for a sprinkler installation, is installed. Consequently, when premises are redisposed the piping system must be dismantled and rebuilt at high cost. DISCLOSURE OF INVENTION The object of the invention is to provide a piping system where the connections between the different pipe sections as well as between the pipes and the means fed via the pipes are not made before the need of such connections arises. Alteration of the piping system configuration without large costs and material loss is thus enabLed for a desired redisposition or conversion of the premises. The invention is based on the utilization of removable branching means which first open the pipe walls when the need arises, so that both pipes and branching means can be used for fitting into new configurations. In this way great flexi- bility and low costs are achieved, while at the same time there is greater operational reliability due to less risk of Leakage. BRIEF DESCRIPTION OF DRAWING The invention will now be described in detail below with the aid of an embodiment example, while referring to the appended drawing, where Figure 1 schematically illustrates a piping systεn in accordance with the invention for a fire extinguishing installation, and Figures 2a and 2b schematically illustrate a branching means suited to connecting a pipe to another pipe or to a fluid spreading means. PREFERRED EMBODIMENT Figure 1 illustrates a part of a piping system intended for distrib¬ uting fire extinguishing fluid, e.g. water to the sprinkler heads 3, in a building 1. A main distribution pipe is denoted by the numeral and secondary pipes 5a, 5b are connectable to it via pipe couplings όa, όb. The dimensions of pipe couplings όa, 6b are suited to the respective diameters of the main distribution pipe and the secondary pipe. These couplings are of a type known per se, where an.opening i a pipe on which the coupling is fixed is provided by a cutting means displaced by a force. Couplings of this kind are described in the Swedish Patent Specification 377371 or the U S Patent Specification 3394 727, for example. Pipe couplings denoted by 7a, 7b are of the same type as couplings όa, 6b and so dimensioned that they can conne the secondary pipes 5a to the branch pipe 8 as well as connecting th sprinkler heads 3 to the branch pipe 8. A closed space 2, in which easily igniteable material is stored, .obtains extinguishing medium directly from the main distribution pipe 4 via a secondary pipe 5b s that the extinguishing medium is fed to the space via a spreader noz or sprinkler, not shown in detail. There are state indicating means 10 which are actuated by an abnormal state, e.g. the exceeding of a given temperature Limit, smoke generation, explosion or ionising etc According to the example, the alarm means 9 is actuated by ionizing, while the means 10 is actuated by exceeding a given temperature Limi The sprinkler heads can naturally be triggered manually also. Figures 2a and 2b illustrate the function of the pipe coupling known per se. The Latter includes an upper part 16 and a lower part 17, ea provided with a semi-cylindrical recess, and when these parts are assembled they sealingly enclose the pipe, e.g. pipe 8. The part 17 provided with a channel 18 extending at right angles to the pipe 8. A branch pipe or a fluid spreader means, e.g. a sprinkler head 3, is connected to the channel 18, ' hich is not in communication with the bore of the pipe on being fitted, since the pipe wall is (Figure 2a). The pipe coupling includes a cutting means 20, displace- able in a transverse channel 19. An explosive charge 21 is arranged in the transverse channel and can be caused to explode with the aid of an activating signal obtained on the wire 22. The cutting means 20 is displaced as a result of the explosion, and communication is opened between the pipe 8 and the sprinkler head 3, the latter only being schematically illustrated (Figure 2b). If a fire occurs in the building 1 and the alarm means 10 generates an activating signal, the explosive charges are triggered in the pipe couplings 6a, 7a and 7b, which are connected to the alarm means 10 via the wire indicated by a dashed line. Communication is thus opened in the pipe coupling 6a as well as 7a and 7b, so that the extinguishing fluid, e.g. water, can flow from the main distribution pipe 4 to the secondary pipe 5a and from there to the sprinkler heads 3 via the pipe couplings 7a and 7b. The extinguishing operation can start immediately in this mode. If the fire extinguishing installation is not put to use, and redisposition of the premises be of interest, the piping system can be taken apart and the pipes assembled in another configuration. An indicator reacting for oinization is arranged in the closed space 2. If a f re in this space should therefore cause ionization, an activating signal is sent on the wire, indicated by a dashed line, to the pipe coupling 6b. Passage is opened from the main distribution pipe_4 to—t-he 'branch pipe 5b so that the closed room 2 is fed with ex¬ tinguishing medium. It will thus be seen that a piping system is provided by the invention, and has a configuration which can be freely changed while using the former parts, which enables large savings and freedom in planning.

Claims: WHAT WE CLAIM IS:- Piping system with variable configuration for spreading a fluid, suitably in extinguishing installations, emergency cooling installat and the like, characterized in that the pipes (4, 5, 6, 7, 8) incorp rated in the piping system lack holes for branches and are provided with pipe couplings (6, 7), of a type having piercing means enabling communication to be made between the pipes connected by a pipe coupl in that the piping system is provided with alarm means (9, 10) which sense the state in the space which is to be monitored, and for an ab normal state in said space generate an alarm signal, and at the pier means are provided with triggering means (21) adapted for activating the hole-making means on receiving an alarm signal, so that the pipi system functions as an ordinary fluid spreading system, but where th branches can be optionally moved as long as the piping system has no been actuated by an alarm signal.

Inventors: JORUP L, TOOMINGAS I
Applicants: ERICSSON TELEFON AB L M, JORUP L, TOOMINGAS I, ERICSSON TELEFONAB L M
Application year: 1981
Main classification: A62C37
IPC codes: A62C35, A62C37, A62C39, F16L41