JP3206860U - Fire prevention equipment - Google Patents

Abstract

Disclosed is an ignition prevention device that reliably prevents charging of a can when a can is filled with or extracted from a can and prevents ignition of the petroleum product. An apparatus for preventing ignition of a can for storing petroleum products. A metal screw portion that can be screwed into a threaded portion provided on the upper portion of the storage can body, and a metal knob portion that is fixed to the metal screw portion and that is screwed and rotated relative to the threaded portion. The metal knob portion is characterized in that the tip of a grounded conductive wire is detachable. It is preferable that the metal knob portion has a tongue-like shape roughened in a linear shape, or has a shaft body that rotationally connects the tips of the conductive wires. [Selection] Figure 1

Description

  TECHNICAL FIELD The present invention relates to an ignition prevention device for a petroleum product storage can that stores petroleum products, and in particular, to prevent ignition of the petroleum product when the petroleum product is filled in or removed from the can. It relates to equipment.

  When a can body such as a drum can storing liquid is shaken by transportation or the like, if the can body is not grounded, static electricity is generated by friction between the insulated liquid and the can body. On the other hand, when a metal product such as a pump nozzle is brought close to the can body in order to extract liquid from the can body, the accumulated static electricity is discharged and a spark is generated. In some cases, there is a risk of explosion by igniting and igniting the liquid that is the contents of the can body or the gas in which the liquid has volatilized.

  In view of this, an apparatus has been proposed for preventing the ignition of the liquid which is the contents of the can once charged or the gas in which the liquid is volatilized.

  For example, Patent Document 1 discloses a pump nozzle with an ignition prevention mechanism that prevents ignition of petroleum products inside a can body even when a discharge occurs when a petroleum product is extracted from a can body such as a drum can. Such a pump nozzle includes a nozzle that discharges an inert gas having a specific gravity equal to or higher than that of air, such as nitrogen gas, and the petroleum product is extracted by another nozzle while filling the inside of the can body with the inert gas.

  Patent Document 2 discloses a device for discharging static electricity generated when a drum can, which is a large can, is transported by an automatic transport device such as a belt conveyor before work. Conventionally, when a grounded earth grip was connected to the drum can to remove static electricity, the drum can be grounded before the actuator for detecting the position of the drum can contact and act on the side of the drum can. Says.

  On the other hand, there has also been proposed an apparatus that prevents charging of the can body and prevents ignition of the liquid that is the contents of the can or the gas in which the liquid is volatilized.

  For example, in Patent Document 3, an apparatus for measuring an insulation resistance between a can body and a ground in an operation of filling a can body such as a drum can with a flammable or combustible organic solvent, a synthetic resin, a paint, or the like by a certain amount. Is disclosed. The filling operation is performed only when the insulation resistance is measured to be sufficiently small.

  Patent Document 4 relates to an apparatus for automatically removing a plug screwed into a base even when the shape of the drum can, particularly the top plate surface on which the base is disposed, is deformed. It discloses that the drum can be grounded through changing the sealing member pressed against the end face from a soft resin to a conductive metal plate. It is possible to prevent the can from being charged when the liquid is filled.

JP-A-11-180500 JP 2006-164665 A Japanese Unexamined Patent Publication No. 6-66758 JP-A-6-255603

  By the way, as in the case described above, a drum that is a storage can for storing petroleum products such as gasoline, kerosene, or lubricating oil, when charged, there is a risk of ignition of the liquid that is the contents or the volatilized gas of the liquid. There is.

  When storing the waste oil of petroleum products in the storage can body, the operation of charging and discharging the waste oil is repeatedly performed, and thus the opportunity for charging and the opportunity for discharging are repeated. In order to prevent charging in such work, a grounded ground clip is also attached to the can body. However, the surface of the can body is painted, and when attaching the ground clip, it is necessary to scrape the paint on the attachment portion to ensure sufficient conduction. Also, if the ground clip is attached again to the part where the paint has been scraped off, or if the outer appearance of the can is allowed to become dirty, dirt may be attached or rust may have occurred. In some cases, sufficient conduction cannot be ensured. Further, scraping the paint every time work is done, the corrosion of the can body is accelerated and the service life is shortened.

  The present invention has been made in view of such a situation, and an object of the present invention is to reliably prevent charging of the can body when the petroleum product is filled into or extracted from the can body. An object of the present invention is to provide an ignition prevention device for preventing the occurrence of fire.

  An ignition prevention device according to the present invention is an ignition prevention device for a petroleum product storage can body, and includes a metal screw portion that can be screwed into a threaded portion provided on an upper portion of the storage can body, and the metal screw portion. A metal knob portion that is fixed and rotates the metal screw portion relative to the threaded portion, and a tip of a grounded conductive wire is detachably attached to the metal knob portion to electrically It is possible to connect to.

  According to this device, the fire prevention device can be easily screwed into the threaded portion by the metal knob portion, and when the petroleum product is filled into the can body or pulled out from the can body by the ground via the metal knob portion. The can can be reliably prevented from being charged, and the ignition of the petroleum product can be prevented.

  In the above-described device, the metal knob portion may have a width that is at least larger than a diameter of the metal screw portion. According to this device, the screwing to the threaded portion can be more reliably performed, and charging of the can body can be more reliably prevented.

  In the above-described device, the metal knob portion may be a tongue-like piece. According to this device, the screwing of the ignition prevention device to the threaded portion can be simplified, and the can body can be reliably prevented from being charged.

  In the above-described device, the tongue-like piece may be provided with a rough surface. According to such a device, when the tip of the conductive wire is attached / detached by an instrument that holds a tongue-like piece such as an earth clip, the possibility of the instrument being displaced or dropped can be reduced. That is, charging of the can body can be prevented more reliably.

  In the above-described device, the rough surface may be formed of a filament. According to such a device, the possibility of shifting or dropping of a device that holds a tongue-shaped piece such as a ground clip can be reduced by simple processing. It can reduce, and can prevent charging of a can body reliably.

  In the above-described device, the metal knob portion may include a shaft body that rotatably connects the tip of the conductive wire. According to this device, the grounding of the ignition prevention device can be easily screwed into the threaded portion, and the storage can body can be reliably prevented from being charged by the grounding through the metal knob portion including the shaft body. can do.

1 is a perspective view of a fire prevention device according to one embodiment of the present invention. (A) The side view of a drum can, (b) The side sectional view of the ignition prevention instrument attached to the drum can. It is a side view which shows the use condition of an ignition prevention instrument. FIG. 6 is a perspective view of a fire prevention device according to another embodiment of the present invention. FIG. 6 is a perspective view of a fire prevention device according to still another embodiment of the present invention. It is the (a) side view and (b) upper sectional view showing the use condition of the ignition prevention instrument. It is the (a) side view and (b) upper sectional view showing the use condition of the ignition prevention instrument.

  The details of an ignition prevention device according to one embodiment of the present invention will be described with reference to FIG.

  As shown in FIG. 1, the ignition prevention device 1 includes a substantially cylindrical metal screw portion 2 and a flat plate that extends in a direction along the axis of the metal screw portion 2 and is fixed to a root side end portion of the metal screw portion 2. Shaped tongue 3. The metal screw portion 2 has a male screw 21 cut from the front end side on the outer peripheral surface thereof. The metal screw portion 2 and the tongue portion 3 are made of a metal conductor and are electrically connected to each other. In addition, the metal screw part 2 and the tongue part 3 may be integrally molded. Here, the X axis is set in the direction along the axis of the metal screw portion 2, the Y axis is set in a direction parallel to the main surface 31 of the tongue portion 3 in a direction perpendicular thereto, and the Z axis is set in the normal direction of the main surface 31. , + X is directed to the base side of the metal screw portion 2.

  The pair of main surfaces 31 of the tongue 3 are substantially parallel to each other, and have a substantially rectangular shape whose ends are cut along the X-axis direction and the Y-axis direction. The width of the main surface 31 in the Y-axis direction is at least larger than the diameter of the metal screw portion 2. In addition, a plurality of grooves 32 extending in the direction along the Y axis are provided in the vicinity of the + X side end on the main surface 31. Further, a packing 11 is attached in the vicinity of the + X side end of the metal screw portion 2.

  Next, the usage method of the ignition prevention instrument 1 is demonstrated using FIG.2 and FIG.3.

  As shown in FIG. 2 (a), a drum can 5 as a can for storing petroleum products is a so-called tight head drum, and a large plug used for extracting a small plug hole including a base 51 and contents not shown. A top plate 50 having holes is provided on the top thereof. Further, when each of the small stopper hole and the large stopper hole is closed by a plug (not shown), the drum can 5 can be hermetically sealed, and the stopper 51 of the small stopper hole is prevented from igniting instead of the plug as will be described later. The instrument 1 can be attached.

  Referring also to FIG. 2 (b), the base 51 has a threaded portion in which the metal skin by the female screw 52 is bare on the inner peripheral side. If the plug is attached to the base 51 prior to the operation of filling or extracting the waste oil of the petroleum product into the drum can 5, the plug is first removed. Then, the metal screw portion 2 is screwed with the female screw 52 of the base 51 to attach the ignition preventing device 1 to the plug 51, thereby closing the small hole.

  Here, since the ignition preventing device 1 has the tongue portion 3, it is easy to pinch and rotate it. In other words, the male screw 21 of the metal screw portion 2 can be tightened by rotating relative to the female screw 52 like a butterfly bolt without using a tool. When the width in the Y-axis direction of the main surface 31 (see FIG. 1) is larger than the diameter of the metal screw portion 2, a larger torque for rotating the metal screw portion 2 can be obtained. It can be screwed and rotated more easily, and can be screwed more reliably. In this way, the metal screw portion 2 is screwed into the threaded portion of the base 51 and tightened, whereby the packing 11 of the ignition prevention device 1 can be pressed against the inner peripheral surface of the base 51 to seal the small hole. . At the same time, the ignition preventing device 1 can be brought into contact with the female screw 52 so as to press the male screw 21, thereby ensuring electrical continuity with the base 51. Further, the base 51 is fixed to the top plate 50 of the drum can 5 to obtain electrical connection with the drum can 5.

  Subsequently, as shown in FIG. 3, a ground clip 4 is attached to the fire prevention device 1. The ground clip 4 has a gripping portion 41 and a clamping portion 42, and one end of a conductive wire 49 is connected to the gripping portion 41. The other end of the conductive wire 49 is connected to a ground line (not shown), thereby ensuring electrical grounding of the earth clip 4.

  The ground clip 4 can be expanded so that the two claw portions 43 at the front end of the sandwiching portion 42 are separated from each other by gripping the grip portion 41 so as to be compressed in the Z-axis direction. Further, the ground clip 4 urges the claw portions 43 by a spring (not shown) in a direction approaching each other. Here, the tongue portion 3 of the ignition preventing device 1 is inserted between the claw portions 43 while the grip portion 41 is gripped so as to be compressed. Next, when the gripping part 41 is released, the ground clip 4 is connected to the ignition preventing device 1 by pressing the claw part 43 against the main surface 31 in the Z-axis direction to sandwich the tongue part 3. By making the tongue portion 3 a plate-like body having main surfaces 31 substantially parallel on both sides, the ground clip 4 can be easily attached and detached, and the conduction between the ignition prevention device 1 and the ground clip 4 can be obtained stably. Can do. That is, the drum can 5 can be grounded by obtaining continuity from the drum 51, the base 51, the ignition prevention device 1, the earth clip 4, the conductive wire 49, and the grounding wire (not shown). Thereby, it is possible to prevent the drum 5 from being charged prior to the operation of filling or extracting the waste oil of the petroleum product.

  The ground clip 4 and the conductive wire 49 can be connected by a component such as a slip ring that can be rotated while ensuring electrical continuity. In this case, the ignition preventing instrument 1 can be rotated while the ground clip 4 is connected to the tongue 3. That is, it can be screwed and rotated with respect to the threaded portion of the base 51 while the ignition preventing device 1 is grounded. Also by this, the drum can 5 can be grounded to prevent charging.

  After the drum can 5 is grounded, the plug of the large plug hole (not shown) is removed, and a nozzle for discharging or sucking the waste oil of the petroleum product is inserted into the large plug hole to fill the drum can 5 with the waste oil of the petroleum product or the drum can 5 Work to extract from. Such work is performed with the drum 5 standing on the floor or the ground. Since the drum can 5 is grounded by the earth clip 4 through the ignition prevention device 1, it does not generate static electricity and is not charged by friction due to the flow of petroleum products. That is, it is possible to reliably prevent the drum 5 from being charged and prevent ignition of the petroleum product.

  As described above, in the ignition preventing device 1, the main surface 31 of the tongue 3 has the groove 32 (see FIG. 1), and the + X side of the groove 32 is convex. When the claw portion 43 is caught in the groove 32, the movement of the ground clip 4 in the X-axis direction is suppressed. Thus, by providing the groove 32 and making the main surface 31 rough, the movement of the ground clip 4 on the main surface 31 is suppressed, the drop off from the tongue 3 is prevented, and the ignition prevention device 1 Ensuring continuity with is more ensured. In addition, a groove extending in the X-axis direction can be provided together with the groove 32 to suppress the movement of the earth clip 4 in the Y-axis direction.

  Furthermore, as another embodiment, a fire prevention device 1 ′ as shown in FIG. 4 may be used. The ignition preventing instrument 1 ′ includes protrusions 33 a and 33 b that protrude in the normal direction of the main surface 31 along the edge of the end portion in the direction excluding the −X direction in the periphery of the main surface 31. The protrusions 33a and 33b are provided by a plate material 33 attached along the periphery of the tongue portion 3, but may be provided by cutting the main surface 31 or attaching a bar material to the main surface 31. it can. Similarly to the groove 32, the protrusions 33a and 33b can suppress the movement of the attached earth clip 4 to prevent the drop and prevent the protrusions 33a and 33b from being connected.

  In addition, the combination of a line | wire, such as a groove | channel and a protrusion, is not restricted to these, For example, a groove | channel and a protrusion can be provided so that it may extend vertically and horizontally, or it can provide in the center part vicinity of the main surface 31. In particular, by providing a groove or a ridge substantially parallel to the end portion of the main surface 31, it is easy to suppress the movement of the ground clip 4 in the direction approaching the end portion. Moreover, the movement of the earth clip 4 can also be suppressed, for example, by applying a texture process or providing a recess to make the main surface 31 rough.

  As yet another embodiment, a fire prevention device 60 as shown in FIG. 5 may be used. The ignition prevention device 60 includes a substantially cylindrical metal screw portion 2, a flange portion 62 fixed to the base side end portion of the metal screw portion 2, and a coaxial shaft extending from the flange portion 62 along the axis of the metal screw portion 2. It has a shaft portion 61 and a head portion 63 having an outer shape larger than that of the shaft portion 61 and fixed to the tip of the shaft portion 61. The metal screw portion 2 has a male screw 21 cut from the front end side on the outer peripheral surface thereof. The metal screw portion 2 and the shaft portion 61 are made of a metal conductor and are electrically connected to each other. It is preferable that the flange part 62 and the head part 63 are also electrically connected. The metal screw portion 2 can be screwed and rotated with respect to the base 51 of the drum can 5 by pinching and rotating the shaft portion 61 or the head portion 63. In addition, it is preferable that the shaft part 61 and the head part 63 have a larger diameter than the metal screw part 2 because a large torque can be obtained. Although not shown in the drawings, it is preferable that the head 63 easily obtains a large torque when it is rotated by pinching the outer periphery of the head 63 by processing a groove for preventing slipping.

  When using such an ignition prevention device 60, for example, a grounding clip 70 as shown in FIG. 6 can be attached to the shaft portion 61 to obtain grounding. In other words, the ground clip 70 has a gripping portion 71 and a sandwiching portion 72, and the conductive wire 49 is once connected to the gripping portion 71 and conducted to the sandwiching portion 71. In particular, referring to FIG. 6B, the ground clip 70 is urged by a spring 74 in a direction in which the tips of the holding portions 72 are brought close to each other, and is thereby detachably attached to the shaft portion 61 of the ignition prevention device 60. It is done. The sandwiching portion 72 is made of a member having a shape in which a flat plate is bent at the bent portion 73 and the tip thereof is directed inward. With this shape, the holding portion 72 can hold the shaft portion 61 by setting the distance of the tip thereof to be smaller than the diameter of the shaft body 61, thereby preventing the ground clip 70 from falling off the shaft body 61. In addition, the sandwiching portion 72 can rotate around the shaft portion 61 with respect to the shaft portion 61, and the ignition preventing device 60 can be rotated while the continuity is ensured by connecting the ground clip 70. In other words, the drum can 5 can be attached to and detached from the ignition prevention device 60 while being grounded.

  Further, in place of the earth clip 70, a ring 65 as shown in FIG. The ring 65 is a ring body that allows the shaft portion 61 to be rotatably inserted and obtains electrical connection with the metal screw portion 2 by contact with the outer peripheral surface of the shaft portion 61, the flange portion 62, or the head portion 63. Connected to one end. This also allows the ignition prevention device 60 to be attached to and detached from the drum 5 while being grounded. In this case, the head portion 63 is detachably fixed to the shaft portion 61, thereby making the ring 65 detachable. The ring 65 may be an assembly part that can be separated by a plane along the axis, and the ring 65 can be detachably attached to the shaft portion 61.

  Also with the above-described ignition prevention device 60, the drum can 5 can be grounded, and its charging can be reliably prevented, and the ignition of petroleum products can be prevented.

  Up to this point, the representative embodiments according to the present invention and the modifications based thereon have been described. However, the present invention is not necessarily limited to these embodiments and modifications, and those skilled in the art will be able to request the attached utility model registration. Various alternative embodiments could be found without departing from the scope.

1, 1 ', 60 Fire prevention device 2 Metal screw part 3 Tongue part 4, 70 Earth clip 5 Drum can 61 Shaft part 63 Head

Claims (6)

An apparatus for preventing ignition of a can for storing petroleum products,
A metal screw portion that can be screwed into a threaded portion provided on the upper portion of the storage can body;
A metal knob portion that is fixed to the metal screw portion and rotates the metal screw portion relative to the threaded portion.
An ignition prevention device characterized in that a grounded conductive wire tip is detachable and electrically connectable to the metal knob portion.   The ignition prevention device according to claim 1, wherein the metal knob portion has a width at least larger than a diameter of the metal screw portion.   The ignition prevention device according to claim 1 or 2, wherein the metal knob portion is a tongue-like piece.   The ignition preventive device according to claim 3, wherein the tongue-like piece has a rough surface.   The ignition preventing device according to claim 4, wherein the rough surface is formed of a filament.   The ignition prevention device according to claim 1, wherein the metal knob portion includes a shaft body that rotatably connects a distal end of the conductive wire.

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