Fluid handling – With casing – support – protector or static constructional... – With hose storage or retrieval means
Patent
1997-02-03
1998-10-27
Chambers, A. Michael
Fluid handling
With casing, support, protector or static constructional...
With hose storage or retrieval means
13735527, B65H 7534
Patent
active
058266143
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a device for automatic closing of cut-off throttle at hose reels including a rotatable reeling or wind-up drum with at least one suction hose for extracting or sucking-out contaminated gases, whereby one or preferably several hose reels are provided at an extracting system, whereby each hose reel cooperates with a cut-off throttle which is intended to completely or partially close the through-flow of gas from the suction hose to the extracting system, whereby the cut-off throttle is provided to close said through-flow of gas completely or partially when the suction hose is completely or partially wound up on the reeling drum or for opening said through-flow of gas completely or partially when the suction hose is completely or partially unwound from the reeling drum and whereby a throttle pivoting or rotating means is provided to pivot or rotate the cut-off throttle to said completely or partially open position or completely or partially closed position.
At devices of the abovementioned type the suction hoses are connected to suction systems for generating a negative pressure in the suction hoses and thereby suck contaminated gases into and through said hoses. Several hose reels are often connected to one and same extracting or exhausting system, which means that gases are sucked into the suction hoses of the various hose reels whether they are used of not, whereby large volumes of air are unnecessarily extracted.
This problem has been eliminated by providing a cut-off throttle at each hose reel and by closing this cut-off throttle at the hose reel which is not used.
Various devices for automatic closing of cut-off throttles at hose reels with suction hoses are known from SE,A,8303147-6 and SE,A,9103188-0. These prior art devices however, are rather expensive and unreliable and they require a transmitter/receiver or switch, which means that they must be connected to a source of current.
The object of the present invention is to provide at devices of the abovementioned type a substantially less complex and less sensitive construction which requires no circuitry. For this purpose, said device has the characterizing features of subsequent claim 1.
Since the position changing device is mounted on or at the reeling or wind-up drum so that it cooperates with the throttle pivoting means one or more times per revolution of the wind-up drum and changes position of the throttle pivoting means when the direction of rotation of the wind-up drum is reversed, the device becomes simple, reliable and easy to maintain.
The invention will be further described below with reference to the accompanying drawings, wherein
FIG. 1 schematically illustrates an extracting system to which three hose reels are connected, whereby at each hose reel there is provided a cut-off throttle with a device according to the invention;
FIG. 2 is a plan view of one of the hose reels of FIG. 1;
FIG. 3 is a perspective view of a part of the hose reel and a part of a stand therefore as well as the device according to the invention, whereby the cut-off throttle is set in an open position;
FIG. 4 is a perspective view of a part of the gable-end of the hose reel and a part of a stand for the hose reel as well as the device according to the invention, whereby the cut-off throttle is set in a closing position;
FIG. 5 illustrates parts of a hose reel according to preceding figures, whereby the cut-off throttle by means of the device according to the invention is set in open position;
FIG. 6 illustrates the same parts as in FIG. 5, whereby the cut-off throttle is set in closed position;
FIG. 7 illustrates the same parts as in FIGS. 5 and 6, whereby the cut-off throttle is set in an intermediate position while the device according to the invention is brought to change position; and
FIG. 8 is a plan view of a gable-end side of the hose reel according to the preceding figures, whereby said gable-end side has blocking or retaining means which can cooperate with a ratchet located on a stand.
The exhausting or extracting system 1 s
REFERENCES:
patent: Re18016 (1931-03-01), Woodford
patent: 176337 (1876-04-01), Neracher
patent: 659996 (1900-10-01), Young
patent: 720228 (1903-02-01), Couch
patent: 2519064 (1950-08-01), Palm
patent: 4315522 (1982-02-01), Brown
patent: 4649954 (1987-03-01), Dunwoody
AB. Ph. Nederman & Co.
Chambers A. Michael
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