JPH0627594Y2 - Structure to prevent dust from entering the tank bottom nozzle - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a structure for preventing dust and the like from entering the tank lower nozzle, and in particular, an opening of the lower nozzle provided at the bottom of the tank, a lid and a sealing member are used. The present invention relates to a structure for preventing dust and the like in the tank from entering the nozzle by urging and sealing the bottom of the tank through the nozzle.

[Prior Art] Generally, a nozzle for supplying or discharging a fluid or the like is provided at the bottom of a tank. At the time of the final process of construction of this kind of tank, at the time of open inspection during operation of the tank, and at the time of repairs accompanying this, these operations were performed by the worker entering the tank.

Conventionally, in these working means, as shown in FIG. 4, dust such as welding slag and grinder debris generated during the work falls to the bottom of the tank and accumulates, or the worker carelessly works. In some cases, the tools may drop to the bottom of the tank, and these may enter the lower nozzle 2 provided at the bottom of the tank.

When the nozzle 2 provided at the bottom of the tank 1 is a curved pipe as shown in FIG. 4, dust 8 that has entered the nozzle 2 may accumulate in the bent portion. Was there. In order to prevent this, for example, the opening 3 of the nozzle 2 of the tank 1 is covered with a sheet 13 or the like for curing to perform the work.

[Problems to be Solved by the Invention] However, the above-described dust intrusion prevention means for covering the opening portion 3 of the nozzle 2 with the sheet 13 or the like is not perfect, and dust and fallen objects are lower nozzles at the bottom of the tank 1. It often happened that it would invade into 2. In such a case, there is a problem that it takes a lot of time and labor to take out the dust 8 and the like that has entered and accumulated in the nozzle 2. Further, when the nozzle 2 is not a curved pipe as shown in FIG. 4 but a straight pipe hanging from the bottom of the tank, it is necessary to remove the nozzle to remove these dusts. It happened.

Particularly, in the tank 1 that requires a high degree of cleanliness for storing food and the like, since it is made of stainless steel or the like, it is necessary to pickle the inside of the tank, and the residual liquid in this operation flows into the nozzle 2. However, there is a problem in that it may remain in the nozzle 2, and it takes a lot of trouble to clean and discharge the nozzle.

Further, even when the stored material in the tank 1 is, for example, fuel for space equipment, the tank 1 is required to have a high degree of cleanliness, and therefore it is necessary to pay close attention to the entry of dust into the nozzle 2. There was a problem that there was.

The present invention has been made to solve these problems all at once, and its purpose is to provide a nozzle member at the lower part of the tank with a seal member and a lid body biased to press the seal member. The purpose of the present invention is to provide a structure for preventing the entry of dust in the tank lower nozzle that prevents dust and the like in the tank from entering the nozzle.

[Means for Solving the Problems] In order to achieve the above object, the present invention connects a nozzle for supplying the storage to a storage utilization system to the bottom of a tank for storing the storage, and cleans the inside of the tank. When closing the tank, the nozzle opening of the tank is closed to prevent the entry of dust into the nozzle. In the structure of preventing entry of dust into the lower part of the tank, it was fixed in advance so as to cross the nozzle opening of the tank. Locking member, lid which is detachably provided so as to cover the locking member during operation and close the opening, a seal member provided between the lower edge of the lid and the tank bottom, and the lid thereof And a biasing means for connecting the body and the locking member to apply a biasing force to the lid to press the sealing member against the bottom of the tank, and after the work in the tank is completed, the lid, the sealing member and the Remove the force means outside the tank It was made to be able to.

[Operation] By removably covering the opening inside the tank of the nozzle provided at the bottom of the tank with the lid, it is possible to put it into the nozzle of work dust, dropped tools, etc. during the construction of the tank or during the open inspection and repair. Prevent intrusion. Further, by providing a biasing means below the lid via a seal member to apply a biasing force to the lid to press the seal member against the bottom of the tank, it is possible to enhance the sealing property thereof, and to remove residues of the cleaning liquid and It can be removed from the tank after cleaning without causing dust and the like to flow into the nozzle, and meets a demand for high cleanliness. Therefore, it is not necessary to carry out the cleaning work for the inside of the nozzle associated with the above-mentioned work, and the nozzle can be used as it is, which reduces the number of steps and improves the cleanliness of the nozzle as well as the cleanliness of the inside of the tank.

[Embodiment] A preferred embodiment of the present invention will be described with reference to the drawings.

As shown in FIGS. 1 and 2, in the dust intrusion prevention structure according to the present embodiment, a locking member 4 provided so as to traverse the opening 3 of the lower nozzle 2 provided at the bottom of the tank 1. And a lid 5 formed so as to cover it, and a sealing member 7 interposed between the lid 5 and the bottom of the tank 1.
And a biasing means 6 for biasing the lid 5 to press the seal member 7 against the bottom of the tank 1.

The tank 1 is for storing fluids and powders, and is formed in a spherical shape or a cylindrical shape. At the bottom of the tank 1, a lower nozzle 2 for supplying and discharging the fluid, powder, etc. stored in the tank 1 is provided.

The tank 1 and the nozzle 2 are connected, for example, by welding,
A circular opening 3 is formed in the connecting portion.

As shown in the figure, a U-shaped locking member 4 is fixedly provided in the opening 3 so as to cross the opening 3 by welding or the like. The locking member 4 serves as a vortex flow preventing member, and when the fluid stored in the tank 1 is discharged from the nozzle 2, a vortex flow is generated around the nozzle 2 to make normal liquid level detection difficult, and In order to prevent the gas from being trapped and discharged, it is possible to use the existing one in the opening 3.

A lid 5 is provided so as to cover the locking member 4 and the opening 3. The lid 5 is formed with an inner diameter enough to cover the opening 3 and the locking member 4, and the locking member 4
It is a cylindrical body having a top surface 15 at a position higher than the height of the above and the upper part is closed. A seal member 7 is provided between the lower end 10 of the lid 5 and the bottom of the tank 1. This seal member 7
Is made of an elastic material such as rubber in a ring shape having a width sufficient to seal the lower end 10 of the lid 5, and an oil-resistant or fire-resistant material is used if necessary.

A biasing means 6 is provided between the lid 5 and the locking member 4. The biasing means 6 applies a biasing force to the lid body 5 to enhance the sealing property of the seal member 7 between the lower end portion 10 and the bottom portion of the tank 1, and as shown in the figure, for example, J
It is constituted by a bolt 9. The lower end bent portion 11 of the J bolt 9 is engaged with the locking member 4, and the screw portion 14 at the upper portion thereof is passed through the bolt hole 12 of the lid body 5 and screwed at the top surface 15 of the lid body 5. Thus, the lid body 5 and the locking member 4 are connected to each other, and the lower end portion 10 of the lid body 5 is configured to be biased to the seal member 7.

Next, the operation of this embodiment will be described.

The dust intrusion prevention structure according to the present invention is used for finishing work at the time of construction of the tank 1, opening inspection of the inside of the tank 1, and repair work.

Prior to these operations, the fluid or powder in the tank 1 is discharged, and then a dust intrusion prevention structure is provided in the opening 3 of the nozzle 2.

First, the ring-shaped seal member 7 is arranged on the peripheral portion of the opening 3 of the nozzle 2 of the tank 1. Then, the lid 5 is placed on the seal member 7. The J-bolt 9 is penetrated and engaged with the bolt hole 12 of the top surface 15 of the lid 5 in advance with the threaded portion 14 thereof loosened. After the bent portion 11 of the J bolt 9 supported by the lid 5 is engaged with the locking member 4, the threaded portion 14 of the J bolt 9 protruding from the top surface 15 of the lid 5 is removed. Tighten the screw.
The lid 5 is urged by tightening the J-bolt 9 as the urging means 6, and the sealing member 7 provided between the lid 5 and the bottom of the tank 1 is pressed to obtain the sealing property. Is increased.

In this way, the dust intrusion prevention structure is attached to the opening 3 of the nozzle 2. In this state, finishing work, inspection, and repair work are performed in the tank 1. In these operations, tools that are inadvertently dropped are received by the lid 5 that constitutes the dust intrusion prevention structure and are prevented from flowing into the nozzle 2. Also, fine dust such as welding slag, grinder dust, or magnetic powder dust due to magnetic powder flaw detection of the welding line is sealed by a seal member 7 which is urged between the lid 8 and the bottom of the tank 1. , Will not flow into the nozzle 2. In particular, when pickling work is performed in the tank 1, this residual liquid is sealed by the sealing member 7 that maintains a high sealing property.
Is prevented from flowing into.

Therefore, in the work in the tank 1, the work can be performed without paying attention to the generation of dust and the like, so that the work can be performed efficiently.

After the completion of work such as opening inspection and repair of the tank 1,
The dust accumulated on the bottom of the tank 1 and the top surface 15 of the lid 8 is collected, discharged to the outside of the tank 1, and cleaned. In particular, fine dust and residual liquid after pickling are sucked by vacuum and discharged to the outside of the tank 1 for cleaning.

After that, the dust intrusion prevention structure is removed. First, the lid 7
The threaded portion 14 of the J-bolt 9 on the top surface 15 is loosened, and the bent portion 11 and the locking member 4 are disengaged. Then, the lid 7 is removed, then the seal member 7 is removed, and the removing work is completed. In particular, since the dust is sealed by the dust entry prevention structure according to the present invention and does not enter the nozzle 2, it is not necessary to clean the inside of the nozzle 2 after these operations, and it can be used as it is.

In addition, in this embodiment, an example in which the U-shaped member as the eddy current preventing member is used as the locking member 4 is shown, but it also serves as a cross-shaped U-shaped eddy current preventing member as shown in FIG. The locking member 18 may be used.

If such an existing eddy current prevention member is not attached, a new one will be attached.

[Advantages of the Invention] Since the present invention is as described above, the lid member is urged by the lid so as to cover the opening of the lower nozzle provided at the bottom of the tank to enhance the sealing property and to be installed in the tank. The dust and the like generated during the work of (1) does not enter the nozzle, and therefore, it is not necessary to clean the inside of the nozzle in accordance with the work inside the tank, and the work inside the tank can be performed efficiently.

[Brief description of drawings]

FIG. 1 is a sectional view of a tank provided with a dust intrusion prevention structure according to the present invention, FIG. 2 is a plan view of FIG. 1, and FIG. 3 is a diagram showing a modified example of the locking member shown in FIG. FIG. 4 is a sectional view of a conventional tank. In the figure, 1 is a tank, 2 is a nozzle, 3 is an opening, 4 is a locking member, 5 is a lid, 6 is a biasing means, and 7 is a sealing member.

Claims (1)

[Scope of utility model registration request] 1. A nozzle for supplying a stored material to a storage utilization system is connected to the bottom of a tank for storing the stored material, and when cleaning the inside of the tank, dust and the like are prevented from entering the nozzle. In a structure for preventing entry of dust and the like in a tank lower nozzle that closes a nozzle opening of a tank, a locking member that is fixedly provided in advance so as to cross the nozzle opening of the tank, and the locking member is covered during work. A lid provided detachably so as to close the opening together with the lid, and a seal member provided between the lower edge of the lid and the tank bottom,
A lid for connecting the lid and the locking member to each other to apply a biasing force to the lid to push the seal member against the bottom of the tank, and after the work in the tank is completed, the lid is provided. A structure for preventing dust and the like from entering a tank lower nozzle, wherein the body, the seal member, and the biasing means can be removed to the outside of the tank.