JPH11292469A - Tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely lift a pump with the bending of a jib suppressed. SOLUTION: In a tank where a pump 4, for pumping out residues in the tank main body in a pump barrel 3 arranged vertically in the tank main body from a roof 2, is lifted by using a jib crane 1, a supporting means is provided which is movably supporting the tip part of a crane jib. The supporting means is constituted of a rail arranged on the roof so as to receive a wheel provided on the tip part of the jib.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a tank,
In particular, the present invention relates to a technique for lifting a pump in a pump barrel.

[0002]

2. Description of the Related Art In recent years, when an LNG base or LPG base is constructed, LPG or LN bases are considered in consideration of harmony with the surrounding environment.
Construction of a tank for storing G is underground. When such an underground tank is constructed, a cylindrical tank body is constructed in an underground pit, and a circular dome-shaped roof is constructed on the ground surface so as to cover the tank body from above. One end of a pump barrel containing a pump is provided in the tank roof in an open state. A plurality of pump barrels are provided vertically from the roof in the tank body, and a pump is housed at the bottom. The pump is for pumping the stored material.

[0003] Such underground tanks include
A jib crane for lifting the pump is provided. The jib crane lifts the pump in the pump barrel from the bottom by pivoting the jib about a post in a horizontal plane and moving a hook along the jib.

[0004]

In the above jib crane, one end of a bar-shaped jib is supported by a post in a cantilever state. Therefore, when the pump is hung on the hook, the jib bends according to the weight of the pump and the position of the hook.

On the other hand, tanks for storing LPG and LNG tend to be large, and the jib needs to be lengthened. Due to the lengthening of the jib, there is a concern that the bending of the jib may exceed an allowable value. In addition, there has been a growing concern that the post supporting the jib may be deformed. Due to such bending of the jib and deformation of the post, a situation occurs in which the pump in the pump barrel cannot be reliably lifted by the jib crane.

The present invention has been made in view of the above-mentioned problems, and has the following objects. Lift the pump without fail to increase the size of the tank. Prevents deformation of the jib crane that lifts the pump.

[0007]

In order to achieve the above object, as a first means, a jib crane is used to pump a pump for pumping out the stored material in a tank body in a pump barrel vertically arranged in the tank body from a roof. In the tank to be lifted by using a jib crane, there is adopted a means for providing a supporting means for movably supporting the tip of the jib of the jib crane. As a second means, in the first means, there is adopted a means in which a support means is constituted by a wheel provided at a tip portion of the jib and a rail arranged on a roof to receive the wheel. .

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a tank according to the present invention will be described below with reference to the drawings. The tank described below stores LNG and LPG at an LNG base or LPG base, and is an underground buried tank in which a tank body is buried underground.

FIG. 1 is a front view showing a configuration of a main part of the present embodiment. In this figure, reference numeral 1 denotes a jib crane. The jib crane 1 is provided, for example, on a roof 2 provided on a tank body, and lifts a pump 4 housed in a pump barrel 3. The jib crane 1 includes a post 1a, a jib 1b, a turning device 1c, a first hoist 1d, a second hoist 1e, wheels 1f, and the like.

The post 1a is formed in a cylindrical shape.
It is erected on the roof 2. The tip of the post 1a is driven to rotate by a turning device 1c. The jib 1b is a beam-like member supported at the tip of the post 1a, and has a first hoist 1d and a second hoist 1e attached to a lower portion thereof, and a wheel 1f attached to the tip thereof. . 1st hoist 1d and 2nd
Each hoist 1e has a moving device, and is configured to move toward and away from the post 1a by moving along the jib 1b.

The first hoist 1d is provided with a hook 1g provided to be able to move up and down, and the second hoist 1e is provided with a wire rope 1h which is able to move up and down. Wheel 1f
Is for movably supporting the end of the jib 1b together with the rail 5. The wheel 1f is configured to rotate on the rail 5 when the jib 1b is turned in a horizontal plane by the turning device 1c. That is, the rail 5 is provided on the roof 2 along the movement locus of the wheel 1f when the jib 1b is turned.

That is, as shown in FIG. 2, the jib crane 1 configured as described above can move the first hoist 1d and the second hoist 1e up to just above the four pump barrels 3A to 3D interspersed. It is configured as follows. The wheel 1f and the rail 5 constitute supporting means for movably supporting the distal end of the jib 1b.

The pump barrel 3 is a tubular member provided vertically in the tank from the roof 2 to the bottom of the tank, and has one end open on the roof 2 and a pump 4 on the bottom. Is stored. A plurality of the pump barrels 3 are provided in a certain area. The pump 4 is for pumping out the stored material of the tank to the outside, and is housed in the pump barrel 3. Also,
A head plate 3a is provided as a lid at the open end of the pump barrel 3, and an end of a wire 4a attached to the pump 4 is locked to the head plate 3a.

According to the underground tank constructed as described above, when the pump 4 in the pump barrel 3 is pulled up, first, the turning device 1c is driven to move the jib 1b to the pump barrel 3 (for example, the pump barrel 3A). Is swung so that it is located directly above. During this turn, the tip of the jib 1b
Since it is movably supported by the support means composed of the wheel 1f and the rail 5, the load due to the weight of the jib 1b, the first hoist 1d, the second hoist 1e, etc. is distributed to the post 1a and the support means. Is done.

Thus, the jib 1b is connected to the pump barrel 3
When pivoted just above A, the first hoist 1d is driven to travel, whereby the hook 1g is moved directly above the pump barrel 3A, and the head plate 3a is removed from the pump barrel 3A. Subsequently, the second hoist 1e is moved immediately above the pump barrel 3A, and the wire 4a locked on the head plate 3a is replaced with a wire rope 1h. Then, the wire 4a is hoisted by the second hoist 1e, so that the pump 4 is hoisted upward.

In this case, the weight of the pump 4 is applied to the first hoist 1d and the second hoist 1e as a load. In this case, the load is also distributed to the post 1a and the supporting means. And pump 4 is pump barrel 3
The inside of A is lifted to a predetermined height.

Therefore, since the tip of the jib 1b is supported by the support means, even if the underground tank is enlarged and the length of the jib 1b is increased, the bending of the jib 1b is suppressed and the pump barrel is prevented from being bent. The pump 4 in 3A can be reliably lifted. At the same time, it is possible to suppress deformation of the post 1a, the jib 1b, and the like.

[0018]

As described above, the tank according to the present invention has the following effects. (1) A support for movably supporting the tip of a jib of a jib crane in a tank in which a pump for pumping a stored substance in a tank body in a pump barrel vertically arranged in the tank body from the roof is pulled up using a jib crane. Since the means is provided, the pump 4 can be lifted reliably without bending the jib. (2) It is possible to suppress the deformation of the jib crane.

[Brief description of the drawings]

FIG. 1 is a front view showing a configuration of a main part of an underground buried tank according to an embodiment of the present invention.

FIG. 2 is a top view showing a configuration of a main part of an underground buried tank according to an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Jib crane 1a ... Post 1b ... Jib 1c ... Swivel device 1d ... 1st hoist 1e ... 2nd hoist 1f ... Wheel 1g ... Hook 1h ... Wire rope 2 ... Roof 3 ... Pump Barrel 3a Head plate 4 Pump 4a Wire 5 Rail

Claims (2)

[Claims] 1. A tank for lifting a pump for pumping a stored substance in a tank body in a pump barrel vertically arranged in the tank body from a roof using a jib crane,
A tank comprising a support means for movably supporting a tip of a jib of a jib crane. 2. The tank according to claim 1, wherein the support means comprises a wheel provided at a tip portion of the jib, and a rail disposed on a roof to receive the wheel.