JP3151627U - Oil spill shut-off device - Google Patents

Abstract

Provided is a safety device that detects a change in the flow rate of oil and quickly stops the outflow of oil when an oil feeding pipe from a kerosene tank is cut. The apparatus is a tube having a length of about 60 mm and an inner diameter of about 8 mm, and is attached between an oil tank outlet and an oil feeding pipe, and a steel ball having a diameter slightly smaller than the inner diameter of the pipe is placed in the pipe. Near the entrance in the pipe where oil flows, there is a metastable place that is slightly recessed so that the steel ball is stopped there. In addition, the inside of the tube outlet is narrowed to a taper shape, and finally the diameter of the steel ball is made smaller. [Selection] Figure 1

Description

  The present invention relates to a safety device for stopping oil outflow when an oil feeding pipe such as a kerosene tank is cut.

Conventional technology

  Usually, the kerosene tank is placed outdoors at a location adjacent to the building, and the oil supply pipe extending from the kerosene tank once dives into the basement and rises in the building and is connected to a boiler or the like.

  The oil feeding pipe is a copper pipe having a diameter of about 10 mm, and can be easily cut by using a tool. There are not a few cases in which an unskilled person cuts the pipe, removes kerosene from the tank and steals it.

  Various ideas have been made to prevent this. For example, as described in the new literature, the lever fixed to the handle of the stop valve of the oil tank is designed to close the stop valve with the force of the spring, but the lever resists the force of the spring from that position. The lever is held by a hook when the valve is in the open position, and the hook is released when the oil supply pipe is cut or shaken. However, since these devices are located outside the oil feeding pipe, the device may be avoided and oil may be stolen.

New literature

Shinshin No. 3120227

  The present invention has been made in view of the above problems, and when the device is installed in the flow path instead of being set on the outside of the valve or the oil feeding pipe, and the oil feeding pipe from the kerosene tank is cut, the flow rate of the oil Provide a safety device that detects changes and quickly stops oil spills.

  Focusing on the fact that when the oil supply pipe is cut and the oil flows out, the flow rate of the oil is higher than during normal use.

  Connect the oil tank outlet and the oil feed pipe to a joint with a tubular device with a length of about 60 mm and an inner diameter of about 8 mm so that the oil tank outlet and the oil feed pipe communicate with each other while making the rear part slightly higher. The inner diameter of a part of the front is slightly thicker, a steel ball with a diameter of about 7.5 mm is placed in that part, and the inner diameter is narrowed to a tapered shape at the rear of the device, and finally it is made thinner than the diameter of the steel ball. Keep it.

  The place where the inner diameter is a little thicker is a metastable place where the steel ball is deep enough to hold it at the normal oil flow rate, but when the flow rate increases, the steel ball is pushed out of it by the force of the oil. It goes forward and fits into the narrowed part of the inner diameter to stop the flow of oil.

  The device of the present invention has an operating part in the pipe and is designed to automatically operate when the oil flow rate increases, so it cannot be operated from the outside, and it is effective in preventing kerosene theft There is.

  The device of the present invention is a tube having a length of about 60 mm and an inner diameter of about 8 mm, and is attached at the outlet of the oil tank in front of the oil feeding pipe. A steel ball having a diameter slightly smaller than the inner diameter of the pipe is put in the pipe. Near the entrance in the flowing pipe, there is a slightly stable metastable place so that the steel ball is stopped there. In addition, the inside of the tube outlet is narrowed to a taper shape, and finally the diameter of the steel ball is made smaller.

  The oil spill blocking device of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view passing through the central axis of the device as viewed from the side, and is made by cutting from a hexagonal prism made of brass having a side of 22 mm. The left end of the figure is male threaded at the insertion port 1 for attachment to the oil tank outlet side, and the right end is female threaded at the receiving port 2 for inserting and fixing the oil feed pipe. Oil flows from left to right in this figure.

  The inner diameter of the tube is 8 mm, but is partially crafted as described below. The metastable place 3 near the entrance has an inner diameter of about 9 mm over a length of about 5 mm. When this apparatus is placed horizontally, the steel ball 4 having a diameter of 7.5 mm remains metastable in this place.

  A part of the rear part of the tube is a steel ball catching portion 5, which is narrowed in a tapered shape from an inner diameter of 8 mm to 7.45 mm over a length of 7 mm.

  A 4 mm screw hole 6 is cut in the lower part of the metastable place 3 and a 4 mm flow rate threshold adjusting screw 7 is attached. By turning this, the depth of the metastable place can be adjusted. It is like that. By varying the depth, the oil flow threshold required to push the steel ball out of the metastable location can be determined. The oil flow rate during normal use is such that the steel ball remains at the metastable location.

  FIG. 2 is a cross-sectional view taken along the line AA ′ showing a portion cut perpendicularly to the central axis of the tube at the metastable location. A hole 8 for fitting a window with a step on the left and right sides of the steel ball 4 is shown. A transparent plastic plate 9 is fitted as a window and bonded to the step portion of the hole. When light is applied from one of the windows, if there is a steel ball, light does not pass through, so the presence or absence of the steel ball can be confirmed.

  Further, a steel ball holding screw 10 is attached obliquely to the same cut surface, and the screw can be tightened at the time of shipment so that the steel ball can be fixed so as not to move from a metastable place. When all the sets are completed, the steel ball holding screw 10 is loosened so that the steel ball can move freely.

  FIG. 3 is a partial cross-sectional view showing a state in which the steel ball is captured by the steel ball capturing portion 5 and is cut by a plane passing through the central axis of the tube. The steel ball 4 is captured by the portion narrowed down in a tapered shape. ing. A screw hole 11 is formed in the pipe and a steel ball pushing screw 12 is fitted so that the screw can protrude from the rear side of the steel ball. After the steel ball is caught by the steel ball catching portion 5, when this steel ball push-out screw 12 is fed out and pushed into the steel ball, the device has a gentle gradient, so the steel ball rolls and is metastable. Return to.

  The flow rate threshold adjusting screw 7, the steel ball holding screw 10 and the steel ball pushing screw 12 are devised such as sandwiching a packing so that oil does not leak from the screw portion, and the screw is not pulled out. After fitting the screw, it is necessary to caulk around the screw head.

Industrial applicability

  As described above, the mechanism of the oil spill blocking device of the present invention is not visible from the outside, and when the oil feeding pipe is cut, the steel ball in the pipe moves to the steel ball catching part and shuts off the oil flow Thus, oil theft can be prevented.

Sectional view of the device of the present invention A-A 'sectional view showing a portion obtained by cutting a metastable place vertically Partial cross-sectional view of the steel ball catcher

DESCRIPTION OF SYMBOLS 1 Insertion port to tank outlet 2 Oil supply pipe receptacle 3 Steel ball stop position 4 Steel ball 5 Steel ball catching part 6 Threshold setting screw hole 7 Threshold setting screw 8 Window insertion hole 9 Transparent plastic plate 10 Steel ball holding Screws 11 Screw holes 12 Steel ball extrusion screws

Claims (5)

  This device has a tubular shape with a hole of about 60 mm in length, a diameter of 20 to 25 mm, and an inner diameter of about 8 mm. In order to stop the oil from flowing out when an oil feed pipe such as a kerosene tank is broken, Connect the outlet and oil supply pipe so that the rear part is slightly higher (1 to 2 degrees in angle), and increase the diameter of a part of the pipe near the inlet in the device to an inner diameter of about 9 mm. A steel ball having a diameter of about 7.5 mm is placed there, and the pipe diameter near the outlet of the apparatus is made 8 mm to a diameter smaller than the diameter of the steel ball for a while. An oil spill blocking device which is pushed out from a stable place and is pressed against a thin steel ball catching portion near an outlet to stop the flow of oil.   At the bottom of the thickened part of the metastable place where the steel ball is placed, there is a tip of a screw with a diameter of about 4 mm. By rotating the screw and moving the tip up and down, An adjusting mechanism is attached which can change the flow rate threshold for blocking the oil flow by adjusting the depth and changing the force required to push the steel ball out of the stable place. Item 3. The oil spill blocking device according to Item 1.   A transparent small window is fitted on both the front and rear sides of the tube wall across the metastable place to confirm whether or not there is a steel ball at the metastable place of the device. The oil spill blocking device according to claim 1.   A screw for pushing out the steel ball is attached to the rear of the steel ball catching part to remove the steel ball pressed against the steel ball catching part near the outlet of this device. The oil spill shut-off device according to claim 1, wherein the tip of the steel ball protrudes into the pipe so that the steel ball can be removed from the steel ball catching portion.   Attach a screw for holding the steel ball to the metastable place and hold the steel ball so that the steel ball does not move from the metastable place until the equipment is installed in a kerosene tank, etc. The oil spill shut-off device according to claim 1, wherein when all the sets are completed, the screw is loosened by turning the screw from the outside so that the steel ball can move freely.

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