JPS58167897A - Pump device able to be submerged - Google Patents

Abstract

PURPOSE:To make it possible to prevent a fluid within a storage reservoir from leaking out by tightly sealing the space between a housing and the storage reservoir by closing a bottom valve when a pump is housed in the housing. CONSTITUTION:A pump 3 is wholly housed in a housing 30 by winding it up, and a sealing plate 23a on a pump bottom part is closely brought in tight contact with the ceiling cover 31 of a storage reservoir 1 via a gasket 30 while a blowing-in plate 23b is brought in tight contact with the sealing plate 23a via a gasket 31. Thereafter, by removing an operating cover 54 mounted on a casing top part 2a, and fitting a box nut 53 on a seal bolt 26 and clamping it, the space between the housing 30 and the storage reservoir 1 is sealed, allowing the storage reservoir 1 to be entirely sealed. In this way, the leakage of a fluid can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a submersible pump device used, for example, when transferring a solution in an LNG tank to the outside.

As shown in FIG. 1, a conventional submersible pump device of this type has a fluid transfer casing 2 (2) that protrudes from the ceiling 11 of the reservoir 1 and that hangs down from the ceiling 1a. (hereinafter referred to as a casing) and a pump 3 that moves up and down inside this casing 2. When this pump 3 is placed at the bottom of the casing 2, the casing is moved by the weight of the pump 3 as shown in Fig. 2. The bottom plate 4, which is attached to the lower end of the bottom plate 2 via a spring 5 and a bolt 6t so as to be vertically movable, is lowered to form an open lower part. Then run pump 3.
When the rotation is turned □, the fluid in the storage reservoir l is sucked in from the open lower part, and the storage chamber 8 formed by the top part 2a protruding above the ceiling IJI of the casing 2 shown in FIG.
The liquid is then discharged through a discharge pipe 9 having a valve 18.

The upper end of the storage chamber 8 is sealed by an upper lid 10 equipped with a seal sleeve 11 and a sleeve seat 12.
4 is attached to the hanging plate 13. A wire 16 for hoisting the pump 3 is connected to the lifting tool 14, and a cable 17 connected to a pump motor (not shown) is attached to the seal sleeve 11.

When the pump 3 is lifted by the cable 16 at the same time as the seal sleeve 11 is lifted by the above-mentioned hanging ring 15, the force of the spring 5 pushes up the bolt 6, so that the bottom plate 4
also rises and closes the open lower.

Before this opening lower is closed by the bottom plate 4, the fluid in the casing 2 is replaced with nitrogen or the like, and the fluid is removed from the casing 2. Then, after removing the upper cover 10 of the storage chamber 8, The castle is lifted up and the castle is removed.

However, the sealing of the fluid in the reservoir 1 during the pump removal operation relies on the bottom plate 4 and the spring 5 at the bottom of the casing 2. However, in reality, due to age-related changes such as deterioration of the spring 5, the seal often no longer functions adequately. In addition, the above seal part is the reservoir 1.
Since it is located at the bottom of the
This is extremely dangerous for storage reservoirs that handle explosive gases such as LNG.

On the other hand, to remove the pump, use a tow truck or the like to lift the suspension ring 15 shown in FIG. 3 upward, or attach the suspension ring 19 to the pump 3 as shown in FIG. In order to lift the hanging pipe 18 upward,
The drawback is that it requires a lot of effort and time.

The present invention has long been proposed to facilitate the work of taking out the irrigation pump, and to completely seal the space between the storage reservoir and the pump storage chamber during maintenance work on the pump, thereby preventing fluid in the reservoir from leaking. The pump is installed in a fluid transfer casing suspended in a storage reservoir so as to be movable up and down, and the casing is protruded above the storage reservoir to form a storage chamber for the pump. In the pump device, a bottom valve t that is opened when the pump is set at the lowest position in the casing is attached to an airtight lid having a suction hole provided at the bottom of the pump, and a winding drum device for raising and lowering the pump is stored in the lid. The machine is installed above the room at any time, and when the winding drum device stores the grain in the storage chamber and the bottom valve is closed during running, the space between the grain storage chamber and the storage reservoir is sealed. It is characterized by this.

An embodiment of the present invention will be described below with reference to the drawings.

FIG.
A seal plate 45 provided inside the lower end of the fluid transfer casing 2 (hereinafter referred to as casing) which is placed on the bottom of side a.
Bo/G 3 is set on top to show that it is in good condition.

The pump 3 is housed in the casing 2 so that it can be raised and lowered,
The airtight lid 21 having a suction hole 22 attached to the bottom of the bong 13 has a suction hole 2 inside that communicates with the suction hole 22.
4, and a sealing plate 23m having a pulley 25 attached to the outside that slides on the inner circumferential surface of the casing 2, and a tapered portion 26a.

A bottom valve 23 is fitted, consisting of a suction plate 23b fitted with a seal port 26, 27, respectively. The seal bolt 26 is inserted through the sealing plate 23at, and the sealing bolt 27 is attached to the sealing lid 2 and the sealing plate 23a1:
[The hanging tool 28 connected to the hanging shear wire 29 while passing through
is combined with

In this case, the suction plate 23b separates from the sealing plate 23a and descends to form the opening 46 due to the lowering of the seal bolts 26 and 27.

1g1J The ceiling 1at of the storage reservoir 1 is exposed, and is stored by the top 2M of the casing 2 supported by the ceiling cover 31 fixed to this ceiling 1a, and the storage chamber upper lid 32 fixed to the upper end of this top 2a. A chamber 30 is formed, and a discharge port [33 having a valve 34 is connected to this storage chamber 30. The upper lid 32 of the storage chamber has a seal 35 to which a hoisting wire 37 connected to the hanging choir 29 is attached, a sleeve 36 that engages with this seal 35, and a cable protection tube 40 connected to a pump motor (not shown). A seal 38 for mounting and a sleeve 39 for engaging the seal 38 are attached. The cable protection tube 40 is connected via a joint 41 to an external cable storage 142 connected to a source (not shown). The winding wire 37
The end portion 37a is covered with a cover 44.

When the pump 3 is operated in the above-mentioned state, the liquid in the storage reservoir l is sucked in through the opening 44 between the sealing plate 23m and the suction plate 23b, and the liquid in the casing 2 is discharged from the outlet (not shown) into the outflow of the pump 3. It flows out and is further discharged through the storage chamber 30 and the discharge pipe 33. At this time, the seal pol) 26, 27 is attached to the tapered part 26a.
, 27a, so the seal pol) 26.27
Since the bolt holes provided in the sealing plate 23a and the sealing lid 21 are sealed by the lowering of the casing 2, the pressure fluid in the casing 2 can be prevented from leaking into the reservoir l.

Next, when storing the pump 3 in the storage chamber 30, first remove the external cable 42 from the joint 41 and store it in the cable box 43, and then place the external cable 42 on the upper cover 32 as shown in FIG. , a case 47 with a cover 48 containing a winding drum full 149 and a motor 51 for driving the winding drum full 149 via a gear mechanism 5° is fixed.

Next, a wire 37 for winding the pump 3 on the winding drum device 1149 and a cable protection tube 4 connected to the pump motor are attached.
When the motor 51 is driven after fixing one end of the wire 37 to the winding body fj149, the cable 40 is also wound around the winding body device 49, so the pump 3 pulls up the inside of the casing 2. It will be done. and pump 3
As shown in FIG.
7 and the storage chamber 30, and the case 47 and the storage chamber 3
Replace with liquefied gas within 0.

Next, the bo/g 3 is rolled up and completely stored in the storage chamber 30,
The sealing plate 23a at the bottom of the pump is brought into close contact with the ceiling cover 31 of the storage reservoir 1 through a gasket 30t, and the suction plate 23b is brought into close contact with the sealing board 23a through a gasket 31. After that, remove the operation lid 54 attached to the casing top 2a, insert a tool from the operation port 55, tighten the bolt 52, and attach and tighten the cap nut 531&: to the seal bolt 26. Room 3
The storage reservoir 1 can be completely sealed by sealing between the storage reservoir 1 and the storage reservoir 1.

During the hoisting work of the pump 30, the hoisting wire 37
Since the sealing state between the cable protection tube 40 and each of the seals 37 and 38 provided on the upper lid 32 of the storage chamber is released, the winding operation can be easily performed.

As explained above, according to the present invention, by installing the winding drum device on the storage chamber during pump hoisting work, the pump can be easily stored in the storage chamber, and during pump maintenance work. By completely sealing the space between the storage chamber and the reservoir, it is possible to prevent the fluid in the reservoir from leaking and improve safety.

[Brief explanation of the drawing]

Fig. 1 is an overall sectional view of a storage reservoir, Fig. 2 is a partially cutaway view showing a valve device of a conventional submersible pump, Fig. 3 is a longitudinal sectional view of a conventional submersible pump device, and Fig. 4 5 is a longitudinal sectional view showing a modified example of the hoisting device in a conventional submersible pump device, FIG. 5 is a longitudinal sectional view showing an embodiment of the submersible pump of the present invention, and FIG. 6 is a pump of the same embodiment. It is a longitudinal cross-sectional view showing the winding device W1. l...Storage reservoir, 2...Casing for fluid transfer, 3
... pump, 21 ... sealing lid, 22.24 ... suction hole, 23 ... bottom valve, 23a ... sealing plate, 23b.
...Suction plate, 49...Storage room. 1 figure; +3 figure! 7 Fourth country l Quo ni mouth ///

Claims (1)

[Scope of Claims] 1. A pump is provided in a fluid transfer casing that is suspended within a fluid storage reservoir so as to be movable up and down, and the casing is made to protrude above the fluid storage reservoir to form a storage chamber for the pump. In the submersible pump device, a bottom valve that is opened when the pump is set at the lowest position in the casing is attached to a sealed lid having nine suction holes at the bottom of the pump, and a winding body for raising and lowering the pump is provided. A device is installed on the storage chamber at any time, and when the pump is stored in the storage chamber by the winding drum device, the bottom valve is closed to create a hermetic seal between the storage chamber and the storage reservoir. Features a submersible pump device. 2. The bottom valve shall be attached to a sealing lid having a suction hole at the bottom of the pump, and shall consist of a sealing plate having a suction hole communicating with the suction hole, and a suction plate attached to the sealing plate so as to be movable up and down. A submersible pump device according to claim 1, characterized in that: