JP5756207B1 - Oil leak prevention material for hydraulic hoses and pile construction method - Google Patents

Abstract

An oil leakage prevention material that is wound around a hydraulic hose to prevent oil leakage to the surroundings and is applicable to various pipe diameters and lengths by a simple operation. . An oil leakage prevention material for use by wrapping around a hydraulic hose, comprising a belt-like first sheet member and a second sheet member that are stacked on each other and at least one of which is oil permeable. One or a plurality of rectangular oil absorption units are formed in the width direction, and a belt-shaped main body sheet is formed continuously in the length direction. Each of the oil absorption units includes a first sheet member and the second sheet. The sheet member has a peripheral part joined and sealed, and a bag part surrounded by the peripheral part and filled with a powdery oil gelling agent between the first sheet member and the second sheet member. And [Selection] Figure 1

Description

  The present invention relates to an oil leakage prevention material for use by wrapping around a hydraulic hose and a method for constructing a pile using the same.

  A large number of hydraulic hoses are used at the site of pile driving or drawing using a hydraulic system such as a pile punching machine. There are a variety of such sites on the sea, underwater, rivers, and land. In that case, if hydraulic oil or lubricating oil flows out due to loosening of the screw at the connecting portion of the hydraulic hose or damage to the hose itself, these places are polluted. Even with biodegradable hydraulic fluid, temporary environmental pollution is inevitable if it is in large quantities. The amount of oil in the hydraulic system is usually 100 to 600 liters / minute per hose. Therefore, since a large amount of oil flows out in a short time, when a hydraulic hose is damaged, it is important to prevent early leakage and early detection.

  Patent Document 1 discloses an oil leakage prevention device that is wound around a connection portion of an oil supply hose, and includes a winding portion provided with a winding fixing means, and an oil absorption bag provided on the back side of the winding portion. .

  Patent Document 2 discloses a detection paint for detecting an oil leak. When a paint is applied to a pipe or pipe in advance, the oil-soluble dye in the white paint is dissolved by the oil that oozes out due to the oil leak. A dark colored instruction pattern is formed.

JP 2004-116579 A Japanese Patent Laid-Open No. 11-44605

  Since the oil absorbing material wound around a hose or the like that is likely to leak oil is provided with a fixing means using a hook-and-loop fastener described in Patent Document 1, it can cope with a certain change in tube diameter, but the tube diameter varies greatly. Not compatible with any type of hydraulic hose. Also, the length is fixed and cannot be adjusted. In a construction site using a hydraulic system such as a pile punching machine, there are a large number of hydraulic hoses with various pipe diameters, and there are a great number of places where there is a risk of oil leakage. Therefore, the oil absorbent material having a limited application range as in Patent Document 1 is not versatile and the installation work becomes complicated.

  The detection paint for detecting oil leakage based on the color change described in Patent Document 2 needs to be applied to a portion where oil leakage is likely to occur, and has no effect of preventing oil leakage itself.

  In view of the above situation, the present invention is an oil leakage prevention material that is wound around a hydraulic hose to prevent oil leakage to the surroundings, and can be attached to various pipe diameters and lengths with a simple operation. An object is to provide an oil leakage prevention material. Another object of the present invention is to provide an oil leakage preventing material that can easily detect oil leakage from a hydraulic hose. Furthermore, an object of this invention is to provide the construction method of the pile using such an oil leak prevention material.

In order to achieve the above object, the present invention provides the following configuration.
A first aspect of the present invention is an oil leakage prevention material for use by wrapping around a hydraulic hose,
One or a plurality of rectangular oil absorption units are formed in the width direction and are continuous in the length direction, the belt-shaped first sheet member and the second sheet member being overlapped with each other and at least one of which is oil permeable. It is provided with a belt-shaped body sheet formed on
Each of the oil absorbing units includes a peripheral edge portion where the first sheet member and the second sheet member are joined and sealed, and a space between the first sheet member and the second sheet member surrounded by the peripheral edge portion. And a bag portion filled with a powdery oil gelling agent.

  The said aspect WHEREIN: The said main body sheet | seat is formed with the perforation which can be cut | disconnected on the boundary line of the said adjacent oil absorption units.

  In the above aspect, an oil detection agent that develops color in the presence of oil is filled together with the powdery oil gelling agent.

  In the above aspect, an adhesive layer is provided on a part of the outer surface of the first sheet member or the second sheet member that is oil permeable.

The second aspect of the present invention is a pile construction method in which a pile is driven or pulled out using a pile punching machine,
The number and the shape which can respond to the required size from the oil leakage preventing material for hydraulic hose according to any one of claims 1 to 4, in order to wind around a portion where there is a possibility of oil leakage in the hydraulic hose of the pile punching machine Cut off the oil absorption unit at
One or a plurality of the oil absorbing units cut out are wound around and fixed to a portion of the hydraulic hose where there is a possibility of oil leakage, and then the pile is driven or pulled out by a pile punching machine.

  In the oil leakage prevention material according to the present invention, a large number of oil absorption units are continuously formed on the belt-shaped main body sheet. Therefore, the oil absorption units are cut from the main body sheet in the number and shape necessary for the application location. Can be used by wrapping around a hydraulic hose. In the oil absorption unit, the sheet member (side contacting the hydraulic hose) on at least one side (side contacting the hydraulic hose) is oil permeable, and the bag portion is filled with powdered oil gelling agent. When oil leakage occurs, the leaked oil is absorbed by the powdered oil gelling agent and remains gelled. Thereby, the diffusion of oil to the surroundings can be prevented. After use, it is possible to easily perform an appropriate process such as removing and collecting the oil absorption unit and incineration. Moreover, it can be manufactured at low cost.

  Further, by filling an oil detection agent that develops color with the presence of oil together with a powdery oil gelling agent, early detection of oil leakage can be performed easily and reliably.

1 (a) and 1 (b) are external perspective views showing two examples of the oil leakage preventing material according to the present invention. 2 is a diagram showing an example of a specific configuration of the oil absorption unit shown in FIG. 1, (a) is a front view when one oil absorption unit is cut out, (b) is a back view, and (c) ) Is a cross-sectional view taken along the line II. FIG. 3 is a schematic side view showing a state in which the oil leakage preventing material of the present invention is applied to a hydraulic hose. (A) is a hydraulic hose before installation of the oil leakage preventing material, and (b) is attached with the oil leakage preventing material. (C) shows the state of the hydraulic hose when oil leakage occurs. FIG. 4 is a diagram showing another application example of the oil leakage preventing material of the present invention, (a) and (b) are external perspective views of various protective covers attached to a hydraulic hose, and (c) is (a) ) (B) is a schematic side view using the oil leakage preventing material of the present invention in combination.

Embodiments of the present invention will be described below with reference to the drawings showing examples of the present invention.
The oil leakage preventing material of the present invention is used by being wound around a hydraulic hose. The hydraulic hose is used in a hydraulic system such as a pile punching machine, for example. In the case of a pile punching machine, a hydraulic hose is used as a piping member of a bearing oil supply device to a pile gripping device, a machine body, an electric motor, a gear device, etc. In addition, “around the hydraulic hose” includes both the periphery of the connection portion between the hoses, the periphery of the connection portion between the hose and various devices, and the periphery of the hose body.

FIGS. 1A and 1B are external perspective views showing two embodiments of the oil leakage preventing material according to the present invention.
The oil leakage preventing material 1 according to the present invention has a belt-like (tape-like) main body sheet. This oil leakage preventing material 1 is used by cutting out a size necessary for an application location. A large number of oil absorbing units 10 having an oil absorbing function are formed on the main body sheet. The cut-off unit of the oil leakage prevention material 1 is one oil absorption unit.

  In the example of FIG. 1A, four rectangular oil absorption units 10 having a predetermined size are formed in the width direction of the belt-shaped main body sheet, and are continuously formed in the length direction. In the example of FIG. 1B, only one oil absorption unit 10 is formed in the width direction of the belt-shaped main body sheet, and is continuously formed in the length direction. The size of one oil absorption unit 10 is, for example, about 65 to 70 mm in width and about 70 to 80 mm in length, but is not limited to these ranges. A specific configuration of the oil absorption unit 10 will be described later with reference to FIG.

  It is preferable to form separable perforations 20a and 20b on the boundary line between adjacent oil absorption units 10. With the perforations 20a and 20b, a desired size can be easily cut from the main body sheet. Any cutting method may be used depending on the pipe diameter and length of the application location. Moreover, when winding around a hydraulic hose, you may wind regardless of the width direction and length direction of an original main body sheet | seat.

  Note that the perforation is not essential, and if the perforation is not formed, the perforation can be cut with a scissor or a cutter.

  FIGS. 1A and 1B show a state in which the entire main body sheet of the oil leakage preventing material 1 is wound in a coil shape. For example, when making a product, one turn may be made one product. As another example, the entire main body sheet may be folded.

  FIG. 2 is a diagram illustrating an example of a specific configuration of the oil absorption unit 10 illustrated in FIG. 1, (a) is a front view when one oil absorption unit is cut out, (b) is a back view, c) is a sectional view taken along line II.

  The main body sheet includes a first sheet member 11 and a second sheet member 12 that are stacked on each other. For convenience of explanation, here, the first sheet member 11 is disposed on the surface side (the side opposite to the side in contact with the hydraulic hose) when the oil leakage prevention material is wound, and the second side is disposed on the back side (side in contact with the hydraulic hose). It is assumed that the sheet member 12 is disposed. At least the second sheet member 12 on the back side is an oil-permeable sheet member for allowing oil leaked from the hydraulic hose to pass therethrough. As the oil-permeable sheet member, for example, a nonwoven fabric is suitable. The first sheet member 11 on the front side may be oil permeable or non-oil permeable. In terms of cost, it is preferable that both the first sheet member 11 and the second sheet member 12 are nonwoven fabrics.

  The oil absorbing unit 10 is formed with a peripheral edge portion 10a having a predetermined width in which the first sheet member 11 and the second sheet member 12 are joined at the peripheral edge thereof. As a joining method, known means such as adhesion, welding, and pressure bonding can be used. As a result, the inner portion surrounded by the peripheral edge portion 10a becomes the bag portion 10b sandwiched between the first sheet member 11 and the second sheet member. The bag part 10b is sealed by the peripheral part 10a.

  The bag portion 10b between the first sheet member 11 and the second sheet member 12 is filled with a powdery oil gelling agent 13 before being sealed. The powdery oil gelling agent 13 is composed of a lipophilic polymer, and when oil is absorbed, it swells while holding the oil in the space between the molecular chains. That is, the powder gels into a jelly form or a solid form. As such a powdery oil gelling agent, there is, for example, trade name Alpha Gel manufactured by Japan Corporation. The powdery oil gelling agent 13 is selected according to the type of oil used in the target hydraulic hose. The filling amount of the powdery oil gelling agent 13 is a volume change when the bag part 10b between the first sheet member 11 and the second sheet member 12 expands and the powdery oil gelling agent gels. Set appropriately in consideration.

  Preferably, the adhesive layer 30 is provided on a part of the outer surface of the second sheet member 12 that is oil permeable. In the example of FIG. 2, an adhesive layer 30 is provided on the back side of the peripheral edge portion 10 a of the oil absorption unit 10. The pattern of the adhesive layer 30 is not limited to the illustrated example. The second sheet member 12 on the back side is preferably provided at the peripheral edge 10a as in the example of FIG. 2 because it is necessary to allow the leaked oil to pass through. An adhesive layer may be provided in addition to the peripheral edge portion 10a.

  The adhesive layer 30 is used for fixing the oil absorbing unit 10 (that is, the oil leakage preventing material) to the hydraulic hose. Even when the oil absorption unit 10 absorbs the leaked oil and increases its weight, an adhesive having an adhesive strength that can maintain a fixed state without falling is selected. In addition, when the oil leakage prevention material is wound in a coil shape as shown in FIG. 1, the adhesive layer 30 on the back surface side contacts the front surface side, but the adhesive layer 30 before use does not adhere to unnecessary portions. Thus, it is preferable to take appropriate measures. Although not shown, for example, release paper may be stuck on the adhesive layer 30. Such release paper is known.

  The adhesive layer 30 is not essential, and means for winding and fixing the oil absorption unit 10 around the hydraulic hose is not limited to adhesion. For example, the oil absorption unit 10 can be wound around a hydraulic hose and fixed with a hook-and-loop fastener, a binding band, a heat shrinkable tube, a self-bonding tape, or the like. Further, these fixing means and the adhesive layer 30 may be used in combination. When used together, the adhesive layer 30 may have a weak adhesive strength that can be temporarily fixed.

  More preferably, in addition to the powdery oil gelling agent 13, the bag portion 10b is filled with an oil detection agent 14 that can indicate the presence of oil by color development. The oil detection agent 14 may be mixed with the powdered oil gelling agent 13 in advance. As such an oil detection agent 14, there is an oil-soluble dye that develops color when dissolved in oil. The color can be selected from red, black, blue, green and the like. The oil-soluble dye is almost white in a fine powder state (for example, a particle size of about several μm to 10 μm).

  When the oil detection agent 14 is mixed, it is preferable to select a white or light-colored oil gelling agent 13 so that the color of the oil detection agent 14 can be easily identified. Moreover, it is preferable that the 1st sheet | seat member 11 of the surface side of the oil absorption unit 10 also has a color and thickness which can confirm the color of the filling in the bag part 10b from the outside. Thereby, when the powdery oil gelling agent 13 absorbs oil, the oil detecting agent 14 dissolves in the oil and develops color, and this can be observed from the outside of the oil absorbing unit 10.

  FIG. 3 is a schematic side view showing a state in which the oil leakage preventing material of the present invention is applied to a hydraulic hose. (A) is a hydraulic hose before installation of the oil leakage preventing material, and (b) is attached with the oil leakage preventing material. (C) shows the state of the hydraulic hose when oil leakage occurs.

  FIG. 3A illustrates the connecting portion 101 of the hydraulic hose 100 and the hose body 102, respectively. In the connection part 101, there are joint fittings, bolts and the like. The hose body 102 is usually made of a flexible material.

  FIG. 3B shows a state in which the oil leakage preventing material cut out to an appropriate size for each oil absorption unit is wound and fixed to the connecting portion 101 of the hydraulic hose and the hose body 102, respectively. In the illustrated example, the oil leakage preventing material 1A wound around the connecting portion 101 has a size composed of four oil absorption units 10A, 10B, 10C, and 10D in total, two in the length direction and in the circumferential direction of the hydraulic hose. is there. The oil leakage prevention material 1B wound around the hose body 102 has a size composed of two oil absorption units 10E and 10F, two in the length direction of the hydraulic hose and one in the circumferential direction. The oil leakage preventing materials 1A and 1B are usually wound around a hydraulic hose so that the adhesive layer at the winding end is overlapped on the winding start end and bonded. Although not shown, it may be reinforced with a binding band or the like.

  In FIG. 3B, since there are a large number of hydraulic hoses at the construction site like another hydraulic hose 200 shown next to the hydraulic hose 100, the hydraulic hoses frequently rub against each other. When wound around the hose body like the oil leakage prevention member 1B, it can also play a role of preventing damage due to friction between such hydraulic hoses and friction between the hydraulic hoses and other devices.

  In the oil leakage occurrence state of FIG. 3C, in the oil leakage prevention member 1A attached to the connection part 101 of the hydraulic hose 100, the oil absorption unit 10B on the left side gels and swells toward the lower half, and is colored. . In the oil leakage prevention material 1B attached to the hose body 102, the upper half of the oil absorption unit 10E gels and swells and develops color. Thereby, it can be confirmed that oil leakage has occurred at the positions of these oil absorption units 10.

  The oil leakage preventing material of the present invention can absorb oil quickly at the initial stage of oil leakage and can be visually recognized by a change in shape or color, so that the oil leakage can be kept within a limited range. The oil leakage prevention material of the present invention is based on the premise that oil leakage is detected at an early stage before the oil leakage exceeds the absorption allowable amount of the powdered oil gelling agent and leaks to the surroundings. Accordingly, inspection and maintenance can be performed before proceeding to a major oil leakage accident. As a result, environmental pollution can be prevented.

  Moreover, the oil leakage prevention material of this invention can narrow down the location where the oil leakage has generate | occur | produced to the comparatively narrow range by comprising the several independent oil absorption unit. If the oil leakage prevention material wrapped around the hydraulic hose is composed of only one oil absorption unit, the entire oil will swell and develop color even if oil leakage occurs at one location. It is difficult to specify the location.

  The oil leakage preventing material that has absorbed the oil can be removed and collected, and can be easily treated by incineration or the like. The oil leakage preventing material of the present invention is used without cutting a necessary size from a belt-like main body, and is therefore resource-saving. The strip-shaped oil leakage prevention material in which a large number of oil absorption units are arranged is suitable for mass production and can be manufactured at low cost. Therefore, it is suitable also for a disposable use.

  FIG. 4 is a diagram showing another application example of the oil leakage preventing material of the present invention, (a) and (b) are external perspective views of various protective covers attached to a hydraulic hose, and (c) is (a) FIG. 4 is a schematic side view in which the protective cover of (b) and the oil leakage preventing material of the present invention are used in combination.

  Currently, various protective covers attached around the hydraulic hose are used. For example, there are a cover for preventing oil splattering (no oil absorbing function) when the hydraulic hose is broken, a wear preventing cover due to friction between the hydraulic hose and surrounding members, a heat-resistant cover for protecting the hydraulic hose from a high temperature ambient environment, and the like. The “protective cover” includes both the purpose of protecting the hydraulic hose itself and the purpose of protecting the worker around the hydraulic hose.

  As the shape of these protective covers, for example, those shown in FIGS. 4A and 4B are known. FIG. 4A shows a cylindrical or sheath (sleeve) -like member 300 that can be opened from one location of the main body 301. For example, hook-and-loop fasteners 302a and 302b are respectively attached to one surface and the other back surface at the end portion of the cut portion. When attaching to the hydraulic hose, the surface fasteners 302a and 302b are overlapped and fixed. FIG. 4B shows a cylindrical or sheath (sleeve) -like member 400, and since the main body 401 is not cut, when attaching to the hydraulic hose, the hydraulic hose is penetrated.

  FIG. 4C shows an example of a state in which the known hydraulic hose protective covers 300 and 400 as shown in FIGS. 4A and 4B and the oil leakage preventing materials 1A and 1B of the present invention are used in combination. First, the oil leakage prevention materials 1A and 1B of the present invention are attached to the hydraulic hose 100, and the protective covers 300 and 400 are attached thereto. You may fix by interposing a double-sided tape etc. between the oil leak prevention materials 1A and 1B and the protective covers 300 and 400.

  Finally, the construction method of the pile which drives or draws out a pile using the oil leak prevention material of this invention is demonstrated. First, the size of the oil leakage prevention material necessary for each of the places where there is a possibility of oil leakage of the hydraulic hose of the pile punching machine is determined. A sheet satisfying the size of each part is cut out from the above-described strip-shaped oil leak prevention material for a hydraulic hose. Cut out the oil leakage prevention material only on the boundary line between adjacent oil absorption units. Usually, since the sheet is cut into a rectangle, one or a plurality of oil absorbing units are arranged in the vertical direction and the horizontal direction on the cut sheet.

  After winding and fixing the cut sheet around the application point of the hydraulic hose, the pile is driven or pulled out by a pile punching machine. If the oil absorption unit of the wound sheet is swelled during construction (when the oil detection agent is included, color is also detected), it is determined that the oily gelation of the powdered oil gelling agent has occurred due to oil leakage. Inspect and maintain the relevant parts.

DESCRIPTION OF SYMBOLS 1 Oil leak prevention material 10, 10A, 10B, 10C, 10D, 10E, 10F Oil absorption unit 10a Peripheral part 10b Bag part 11 1st sheet member 12 2nd sheet member 13 Oil gelling agent powder 14 Oil detection agent 20a, 20b Perforation 30 Adhesive layer 100, 200 Hydraulic hose 101 Joint part 102 Hose part 300, 400 Hydraulic hose protective cover

Claims (5)

An oil leakage prevention material to be used around the hydraulic hose,
One or a plurality of rectangular oil absorption units are formed in the width direction and are continuous in the length direction, the belt-shaped first sheet member and the second sheet member being overlapped with each other and at least one of which is oil permeable. It is provided with a belt-shaped body sheet formed on
Each of the oil absorbing units includes a peripheral edge portion where the first sheet member and the second sheet member are joined and sealed, and a space between the first sheet member and the second sheet member surrounded by the peripheral edge portion. An oil leakage prevention material for a hydraulic hose, characterized by having a bag portion filled with a powdery oil gelling agent.   The oil leakage preventing material for a hydraulic hose according to claim 1, wherein the main body sheet is formed with a perforation that can be separated on a boundary line between the adjacent oil absorbing units.   The oil leakage preventing material for a hydraulic hose according to claim 1 or 2, which is filled with an oil detection agent that develops color by the presence of oil together with the powdery oil gelling agent.   The hydraulic hose according to any one of claims 1 to 3, wherein an adhesive layer is provided on a part of the outer surface of the first sheet member or the second sheet member that is permeable to oil. Oil leakage prevention material. In the construction method of the pile that drives or pulls out the pile using a pile punching machine,
The number and the shape which can respond to the required size from the oil leakage preventing material for hydraulic hose according to any one of claims 1 to 4, in order to wind around a portion where there is a possibility of oil leakage in the hydraulic hose of the pile punching machine Cut off the oil absorption unit at
A pile construction method, wherein one or a plurality of the oil absorbing units cut out are wound around and fixed to a portion of the hydraulic hose where there is a possibility of oil leakage, and then the pile is driven or pulled out by a pile punching machine.

Images