JP3223249U - Inspection opening / closing device - Google Patents

Abstract

An inspection port opening / closing device capable of opening and closing a float switch inspection port from an oil storage floor without installing a ladder, a staircase, or the like. An inspection port opening / closing device comprising a locking / unlocking unit for locking and unlocking a float switch inspection port, and an opening / closing bar for opening / closing the float switch inspection port. A link mechanism that can operate the unlocking lever 73 of the lock unit 70 and a grip portion 83 that can operate the link mechanism are provided. [Selection] Figure 3

Description

  The present invention relates to an opening / closing device for a float switch inspection port used for maintenance inspection of a float switch for confirming the amount of fuel held in an oil tank used in a power generation device.

  In recent years, disasters such as earthquakes and heavy rains have occurred frequently, and emergency power generation devices have been provided as countermeasures against power outages. In addition, it is necessary to provide a power generation device on a remote island, a mountainous area, or the like. Since the power generation devices used for these are driven by fuel such as light oil and heavy oil, an oil tank for fuel supply is provided, and in order to check the amount of fuel held in the oil tank, A float switch is provided. Since the float switch has a length close to the inner diameter of the oil tank due to its structure, when it is necessary to extract from the oil tank in the maintenance and inspection of the float switch, a space is required in the extraction direction.

  Here, it is generally not possible to secure a space between the oil tank roof where the oil tank is installed and the upper surface of the oil tank so that the float switch can be pulled out. The float switch is pulled out after opening the inspection port. Normally, the inspection port is opened and closed by climbing from the outside to the roof of the oil storage. However, this is a work at a high place, which is not only dangerous, but there is a problem that a total of two workers have to be arranged on the roof of the oil storage and inside the oil storage.

  Therefore, if the inspection port can be opened and closed from the inside of the oil reservoir, the above problem can be solved. However, in order to access the inspection port provided on the roof, an access ladder and stairs are provided inside the oil reservoir. Etc. need to be provided. However, since there is a restriction that the inspection port must be provided almost directly above the float switch installed in the oil tank, it is not easy to install ladders, stairs and the like.

  Then, this invention makes it a subject to provide the inspection port opening / closing apparatus which can open and close a float switch inspection port from the floor of an oil reservoir, without installing a ladder, a staircase, etc.

In order to solve the above problems, the inspection opening and closing device of the present invention is
A locking / unlocking unit that locks and unlocks the float switch inspection port;
An inspection port opening and closing device comprising an opening and closing bar for opening and closing the float switch inspection port,
The open / close bar includes a link mechanism capable of operating an unlocking lever of the locking / unlocking unit and a gripper capable of operating the link mechanism.

  By providing the locking / unlocking unit, the float switch inspection port can be securely closed except during maintenance inspection of the float switch, and the unlocked state can be released by a link mechanism provided on the opening / closing bar. Therefore, the opening / closing operation of the inspection port can be performed using the opening / closing bar from the floor of the oil storage.

  The link mechanism of the opening / closing rod with the link mechanism is fixed to the float switch inspection port.

  By fixing the link mechanism, the link mechanism can easily and reliably operate the unlocking lever of the locking / unlocking unit. Furthermore, the operation of opening and closing the float switch inspection port with the opening and closing bar becomes easy.

  The grip portion of the opening / closing rod with the link mechanism can be detached from the link mechanism.

  If the grip portion of the opening / closing rod with the link mechanism can be removed from the link mechanism, the grip portion will not interfere with the operation in the oil reservoir when the float switch inspection port is not used.

It is a figure which shows an oil storage. It is a figure which shows the oil tank installed in the oil storage. It is a figure which shows one Embodiment of the inspection port opening / closing apparatus of this invention.

  Embodiments of the present invention will be described below with reference to the drawings. In addition, in each figure, the same code | symbol is attached | subjected to the same part.

  FIG. 1 is a diagram showing an oil storage 10. 1A is a front view, FIG. 1B is a right side view, FIG. 1C is a left side view, and FIG. 1D is a plan view. In the oil reservoir 10, an oil tank 20, a manual pump 30 (see FIG. 2), and a plurality of pipes connecting them are housed. A maintenance / inspection door 11 is provided in front of the oil tank 20, and a float switch inspection port 60 is provided on the roof for extracting the float switch 27 from the oil tank 20 during maintenance / inspection of the float switch 27. It has been. In the unlikely event that fuel oil flows out of the oil tank 20, an oil barrier 13 is provided around the inner side of the oil reservoir 10 in order to prevent diffusion to the outside.

  FIG. 2 is a view showing the oil tank 20 installed in the oil storage 10. 2A is a front view, FIG. 2B is a right side view, FIG. 2C is a left side view, and FIG. 2D is a plan view. In the present embodiment, the oil tank 20 has a rectangular parallelepiped shape, and its dimensions are, for example, 1120 mm in length, 700 mm in width, and 573 mm in height. Normally, about 90% of the total volume of the oil tank 20 is filled with fuel oil. The volume is about 390 liters. In order to supply fuel oil from the oil tank 20 to a power generator (not shown) without using a pump, the oil tank 20 is installed on a gantry.

  The oil tank 20 is provided with an oil tank inspection port 21 for internal inspection and a float switch 27 for confirmation of retained fuel. A fuel inlet pipe 22 and a fuel return pipe 23 are provided between the oil tank 20 and a power generator (not shown). It has been.

  Further, the oil tank 20 is provided with a pressure equalizing vent pipe 25 and a drain pipe 28 for draining liquid. Note that a flash prevention wire mesh 26 is attached to the tip of the vent pipe 25.

  The manual pump 30 shown in FIG. 2 represents a wing pump. The wing pump is a reciprocating pump that sucks fluid by moving the lever 31 in a fan shape and reciprocatingly moves an inner blade (not shown) in a seesaw shape, and pumps the sucked fluid. As the manual pump, a piston pump, a plunger pump, a diaphragm pump, etc. can be used in addition to a wing pump.

  The manual pump 30 is used to supply fuel to the oil tank 20. A fuel suction pipe 33 including an oil-resistant hose is inserted into a drum can containing fuel, and the sucked fuel is supplied to the oil tank 20 through a discharge pipe 32. Used to send oil to

  FIG. 3 is a view showing an embodiment of the inspection port opening / closing device 90 of the present invention. 3A is a plan view, FIG. 3B is a BB cross-sectional view of FIG. 3A, and FIG. 3C is a CC cross-sectional view of FIG. 3A. The inspection port opening / closing device 90 of the present invention includes a float switch inspection port 60, a locking / unlocking unit 70, and an opening / closing rod 80 with a link mechanism.

  FIG. 3A shows a plan view of the float switch inspection port 60. The inspection port 60 includes a cover portion 61 and an outer frame portion 62, and the shape of the cover portion 61 is a rectangle in plan view. This is because when the float switch 27 is extracted from the oil tank 20, the float switch 27 can be extracted upward from the oil tank 20 by passing through a rectangular space formed by opening the inspection port 60, and then the rectangular space. The float switch 27 is tilted obliquely using the above and is moved by moving it over the oil tank 20 so as to be extracted.

  The locking / unlocking unit 70 includes a locking / unlocking fitting 71 and a receiving fitting 72. As the locking / unlocking unit 70 shown in FIGS. 3 (a) to 3 (c), a commercially available locking / unlocking unit, for example, Snatchlock (registered trademark) manufactured by Takigen Manufacturing Co., Ltd. can be used. The snatch lock is unlocked by engaging the U-shaped bracket of the receiving bracket 72 with the locking / unlocking fitting 71 and operating the unlocking lever 73 of the locking / unlocking bracket 71 to release the engagement. Can be unlocked. As shown in FIG. 3 (c), the locking / unlocking metal fitting 71 is fixed to the cover part 61 by a metal holding part 74 attached to the cover part 61. As shown in c), it is fixed to the outer frame portion 62 by three bolts.

  As shown in FIG. 3C, the link mechanism-equipped opening / closing rod 80 includes a link tip 81, a link 82, a first link pin 85, and a second link pin 86 that actuate the unlocking lever 73 of the locking / unlocking fitting 71. And a rod-shaped gripping part 83 that operates the link mechanism and opens and closes the float switch inspection port 60. The link tip portion 81 and the link portion 82 are supported by a link holding portion 84 attached to the cover portion 61 so as to be rotatable by a predetermined angle by a first link pin 85. Here, since the link tip 81 is fixed to the first link pin 85, it rotates together with the first link pin 85. Similarly, since the link portion 82 is also fixed to the first link pin 85, if the first link pin 85 is rotated by the link portion 82, the link tip portion 81 is also rotated at the same time.

  As shown in FIG. 3C, the link portion 82 is divided into two parts in the vertical direction, and a second link pin 86 is provided therebetween. Here, the link part 82 divided into two can freely rotate around the second link pin 86.

  Here, when the float switch inspection port 60 is closed, that is, when the locking / unlocking unit 70 is locked (S1 in FIG. 3C), when the gripping portion 83 connected to the link portion 82 is pushed up, the link portion While rotating around the second link pin 86, 82 moves obliquely upward to the left as shown in FIG. 3C, and simultaneously rotates the first link pin 85. Therefore, the link front end 81 also rotates together with the first link pin 85 and presses the unlocking lever 73 from above, and the locking / unlocking metal fitting 71 releases the engagement with the receiving metal 72 and unlocks it. The state (S2 in FIG. 3C) is entered.

  Thereafter, when the grip portion 83 is further pushed up, the cover portion 61 is lifted upward, and the float switch inspection port 60 is opened (S3 in FIG. 3C). When the inspection port 60 is closed, the above-described operation is performed in reverse. That is, when the gripping portion 83 is pulled down from the state in which the inspection port 60 is open (S3), the cover portion 61 is closed at the position of S2, and the locking / unlocking metal fitting 71 is engaged with the receiving metal fitting 72 to be locked. When the grip portion 83 is pulled down, the inspection port 60 is locked and closed (S1).

  Since the gripping part 83 hangs down from the vicinity of the locking / unlocking metal fitting 71 so that it can be operated from the floor surface of the oil storage 10, if the gripping part 83 can be removed from the link part 82, the float switch inspection port 60 is opened. When not in use, the gripping part 83 does not interfere with the work in the oil reservoir 10.

DESCRIPTION OF SYMBOLS 10 Oil storage 11 Door 13 Oil breakwater 20 Oil tank 21 Oil tank inspection port 22 Fuel inlet pipe 23 Fuel return pipe 25 Ventilation pipe 26 Flame prevention metal mesh 27 Float switch 28 Drain pipe 30 Manual pump 31 Lever 32 Discharge pipe 33 Fuel suction pipe 60 Float switch inspection port 61 Cover portion 62 Outer frame portion 70 Locking / unlocking unit 71 Locking / unlocking bracket 72 Bracket 73 Unlocking lever 74 Bracket holding portion 80 Opening / closing rod with link mechanism 81 Link tip portion 82 Link portion 83 Holding portion 84 Link holding Portion 85 First link pin 86 Second link pin 90 Inspection port opening / closing device

Claims (3)

A locking / unlocking unit that locks and unlocks the float switch inspection port;
An inspection port opening and closing device comprising an opening and closing bar for opening and closing the float switch inspection port,
The inspection port opening / closing device, wherein the opening / closing bar includes a link mechanism capable of operating an unlocking lever of the locking / unlocking unit and a gripper capable of operating the link mechanism.   2. The inspection port opening / closing device according to claim 1, wherein the link mechanism of the opening / closing rod with the link mechanism is fixed to the float switch inspection port.   The inspection port opening / closing device according to claim 1 or 2, wherein the grip portion of the opening / closing rod with the link mechanism can be detached from the link mechanism.

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