JPS61279789A - Pump device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention [Field of Application] The present invention relates to the storage of liquids, for example, cryogenic liquids such as liquefied gases, such as in the hull of a cargo ship or in storage containers placed on the ground. This invention relates to a pump device for discharging water from a container.

BACKGROUND OF THE INVENTION An example of such a pumping device is shown in US Pat. No. R@31.445. In this type of device, the fluid transport casing extends downward into the reservoir.

The upper end of the casing is sealed by a removable head plate containing a sealing gland with a vertically movable lifting member. The upper portion of the casing is provided with an outlet leading to the exterior of the reservoir, and the lower end thereof is provided with a foot valve that is reversibly biased to a closed position to isolate the casing from the reservoir. ing. An integrated unit of an electrically powered motor and a pump driven thereby moves through the casing through the upper end of the casing to an operating position at the lower end of the casing and upwardly from the operating position. It has dimensions and structure suitable for vertical movement. In the operative position, the integrated unit exerts a force on the foot valve to open it, thereby pumping fluid from the reservoir through the casing and out the outlet.

The motor is electrically connected to a connection point provided below the head plate by flexible conduit extending upwardly within the casing. A grounding tube similarly extends upwardly from the motor through the casing to a grounding connection provided on the underside of the head plate. The flexible support cable is
It extends from the integrated unit through the casing to a vertically movable lifting member of the sealing gland. Additionally, another lifting cable also extends from the integrated unit through the casing to an upper portion of the casing where it connects with an external lifting mechanism.

If it is necessary to repair the integrated unit, ie the motor/pump unit, remove the unit from the casing as described below. The first unit is first lifted from the foot valve by lifting the movable member of the sealing gland connected to the device by means of a support cable. This causes the 17-gate valve to close. A purge gas is then flowed into the casing and the remaining fluid is returned from the casing to the reservoir via the foot valve. The head plate is then removed from the upper end of the casing and raised to open an entrance to the interior of the casing. After this has been done, the lifting cable 1 is attached to the winch, the conduit and grounding tube are removed from the top connection, and the support cable is removed from the vertically movable member of the sealing gland. Then use a winch to pull out the membrane mass. When withdrawing, the electrical wires, grounding cables, and support cables should be coiled at the top of the reservoir or rolled onto a storage reel. When placing the pump/motor unit in the casing, the procedure described above can basically be reversed (with the exception of introducing the purge gas).

The pumping devices described above are used and working well in all parts of the world. However, this type of device
It has certain problems. For example, during operation, separate tubes and cables may wave and come into contact with each other due to the upward flow of liquid within the casing. This carries the risk of wearing out the conduit and electrically shorting the circuit. Also, in extreme cases, the cables and tubing can become entangled with each other, making it difficult to remove the pump/motor unit.

Also, during removal, it is difficult to dispose of several separate spread capes, and the storage [
It becomes difficult to hold it at the top.

US Patent No. 3.876.126/No. 4.080.10
Nos. 6 and 4,435,132 show other pump devices that do not fully solve the problems mentioned above.
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i(:1 [Summary of the Invention]); An object of the present invention is to eliminate the above-mentioned problems.
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The goal is to provide a structure that is easy to understand.
;:1,'1 In the present invention, a conduit, a grounding pipe, and a support cable
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i(1'; Use a single multi-core cable. The outer sheath should preferably be porous so that condensation can evaporate. However,
': 11□: Both ends of the exterior are protected from condensation that forms between them.
1', , I may be sealed to prevent it. support cape
:) °°Tor and the lower end of the conduit and ground pipe, connect the lower end of the exterior
;: Extends beyond 1 and connects the motor/boot. 1'1, the upper ends of the support cables and conduits and ground tubes extend beyond the upper end of the sheath. The support cable connects to the movable lifting member of the two sealed glands, the conduit connects to the connection point, and the ground tube connects to earth. The multicore cable and the lifting cable are prevented from coming into contact by removable brackets that hold them laterally separated. However, even if such contact were to occur, the abrasion resistant sheath would not damage the conduit.

Additionally, the conduit, ground tube, and support cable are held tightly within the sheath to prevent wear and tear from relative movement between these members.

As mentioned above, the porous nature of the sheath allows condensation on the enclosed tube and support cable to evaporate into the atmosphere after removal of the multicore cable from the casing. The support cable is wrapped with insulating material to protect it in the event of a ground fault in the equipment.

Preferably, the protective sheath is made of metal mesh, such as stainless steel.

A removable bracket loosely surrounds the multicore cable and is firmly fixed to the lifting cable. Additionally, the collar is securely secured to the multicore cable at a location adjacent to each bracket. When lifting the lifting cable to raise the motor/pump unit, the connection bracket abuts the collar and raises the multicore cable. The lifting cable is wound on the rotating drum of a common hoisting device, and the connecting bracket is
When the upper end of the casing is reached, it is separated from the multicore cable and can be slid down the lifting cable. The multicore cable is then wound onto a storage drum or neatly wound onto the roof of a storage container.

〔Example〕

Hereinafter, the present invention will be described in detail based on the accompanying drawings.

In FIG. 1, tank 10 contains some liquid, such as natural gas, methane, butane, propane.

It is used as a storage R for liquefied gases such as ammonia and ethylene or cryogenic substances. The liquid level is some distance below the roof 12 of the reservoir, and the intervening space is filled with gas boiling off from the liquid, so that at typical surface temperatures, the vapor pressure of the liquid pressurizes the reservoir. ing. Further, the space may be filled with other suitable inert gas.

A cylindrical casing 14 extends downwards from the roof 12 to the bottom area of the tank. The upper end of the casing is closed with a movable head plate 16. The tank communicates with the outside through a discharge port 1B at the top of the casing. A purge gas inlet 20 is connected to the casing, and a 7-gate valve 22 is provided at the lower end of the casing.

The foot valve has a poppet 24 biased by a spring 26 into a normally closed position (FIGS. 4 and 5) in sealing engagement with an annular valve seat 28. The interior of the casing 14 is thereby separated from the reservoir R. An integrated unit or motor/pump unit 30 consisting of a pump 32 driven by an electrically energized motor 34 passes through the upper casing and is arranged on a seat 36, here shown in the form of a cone. It has dimensions and construction suitable for vertical movement downwardly toward or upwardly from the operating position. in the position shown in Figure 1.
1, the pump 32 engages the foot valve poppet 24 as indicated by reference numeral 38. The force exerted by the purge gas forced into the casing when required increases the apparent weight of the motor/pump unit 30, which increases the biasing force of the spring 26 and the poppet 24.
As a result, the poppet 24 of the foot valve is suppressed downward, and an inlet opening 4G is formed between the poppet 24 and the valve seat 28. When the foot valve is opened, there is no longer a differential pressure between the inside and outside of the casing, so that the weight of the motor/pump unit is continuously assisted by complementary dynamic means such as the force of the purge gas inside the casing. is sufficient to hold the foot valve open without the need for During operation, the pump opens at 40. ,.

takes in liquid from the reservoir R via the pump discharge part 4
The liquid is delivered from 2. From now on, the liquid rises within the casing 14 and exits through the outlet 18.

The aforementioned U.S. Patent No. RK 31,445 describes a foot valve 2
2 and motor/pump device 30 are shown in more detail.

The head plate 16 includes a sealing gland 44 along with a vertically movable member 46 having a rising member 48 at its upper end and a connecting member 50 at its lower end. The connecting member 50 is connected by a U-bolt and a cross-bin member 52.
It is removably coupled to support member 54 . The support member 54 is connected to the upper end of a flexible support cable 56. The lower end of the support cable is attached to a coupling member 58 on the top of the motor/pump unit 30.

In FIG. 2, support cable 56 includes flexible conduit 6
2 and at least one flexible ground tube 64.

Most of the length of these tubes are enclosed within a flexible, preferably perforated, protective sheath 68 and surrounded by a flexible filler such as the one designated by reference numeral 6B. and is enclosed within the outer case 68. The upper and lower ends of the electrical conduit 62 and the ground pipe 64 extend beyond the upper and lower ends of the exterior, respectively. The upper and lower ends of the conduit are connected to the head plate 16.
Separable connector 70 and motor 34 provided below
The connection boxes 72 are connected to the connection boxes 72, respectively. Ground pipe 64
The upper and lower ends of the head plate 16 are connected to a grounding bracket 74 and a connection box 72 provided on the lower surface of the head plate 16, respectively.

The lifting cable T6 is connected to the motor/pump unit'3°
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- Connected to the member 58) of the unit 30, and connected to the multi-core cape 60 in a substantially parallel relationship as a whole.
:□ - Extends above the sink 14. Lifting case
:□ When not using the upper end of the pull 76, use a spatula 1°7
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It is wrapped around door 8.
The i multicore cable 60 and the lifting cable 76 are
They are laterally separated by a plurality of brackets 80.

As shown in FIGS. 2 and 3, each bracket 80 is
It consists of two semi-relaxed members 80m and 80b held together by joint bolts 81 and the like.

By loosening the bolt, the two half-rest members can be separated in the front-rear direction. Two semi-rest members 80a
, 80b firmly grip the lifting cable T6 between them and fix the position of each bracket 80 therein. Further, the two half-rest members 80m and 80b form an enlarged opening 82 that loosely accommodates the multicore cable 60. Thus, the bracket 80 can slide along the cable 60.

Further, a collar 84 is firmly fixed to the multicore cable 60 adjacent to each platen. Collar 84 is too large to fit through opening 82 in the bracket.

Collar 84 has a removably attached centering bracket 86. The platen 8B supports a guide wheel 88 which is arranged to overflow into contact with the inside of the casing 14 and rotate. During operation of the device, the support cable 56 is held taut so that the multicore cable 60 and the lifting cable 76 within the casing (the cable 76 is connected to the multicore cable 60 by the bracket 80) are held taut. (by connecting) to minimize the wave motion.
Figure 1 shows the entire structure of the pump device in the operating position.
A one-piece member is shown. Motor/pump unit '11' 30 holds foot valve poppet 24 in open position
;1, the pump receives fluid from the reservoir R;
and 1: A discharge port 18 for pumping up the fluid and passing it through the casing.
Send to i. When the fluid flows upward inside the casing, [1;・ Waves are generated in the multicore cable 60 and the lifting cable 76.
I; □1・□ tends to occur. The bracket 80 is a cape.
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Since it has the function of keeping the 80.76 apart,
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Even if surface contact occurs, the conduit 62 and the ground pipe
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]II. The conduit pipe 62 and the ground pipe 64 are connected to the exterior 68
(Being tightly encapsulated with filler material 66 therein, mutual movement of these tubes and cables is largely prevented, thus further reducing the possibility of damaging wear.) In this way, wear of the tubes The risk of causing a mechanical short circuit can be almost eliminated.

In FIG. 4, if the motor/pump unit 30 is removed and subjected to normal maintenance or if worn parts need to be repaired or replaced, a winch or other lifting mechanism (not shown) is used. Rising member 48
, and the vertically liftable member 46 is pulled upwardly through the sealing gland 44 . The member 46 is
Motor/pump unit 30 via support cable 5B
When the unit 30 is raised, the foot valve poppet 24 is biased by the spring 26 into sealing engagement with the valve seat 28. The interior of the casing is therefore effectively separated from the reservoir 8. Thereafter, purge gas is introduced from the inlet 20. The purge gas passes fluid within the casing 14 past the motor/pump unit and out of the foot valve 22, which here effectively acts as a one-way check valve.

After purging the casing, head plate 16 is removed from the casing and raised sufficiently to allow support rod 90 to be inserted into support member 54, as shown in FIG. The head plate is then lowered slightly until the support rod 90 is located at the edge of the casing. At this point, the entire weight of the motor/pump unit 30 is supported by the support rods via the support cables 56. After that, remove the conduit 62 from the connector TO,
Remove the grounding tube 64 from the grounding bracket 74, and
By removing the bolt and crossbin member 52 from the support member 54, the head plate can be removed from the casing.

After this, the lifting cable T6 is connected to a lifting device, such as a winch 92, as shown in FIG. Winch 92 continuously lifts motor/pump unit 30 from the casing. The bracket 80 engages with the collar 84, so that the multicore cable 6G is pulled up together with the lifting cable. When each collar 8.4 reaches the upper end of the casing, the associated centering bracket 86 is removed and installed. Alternatively, the multicore cable 60 can be housed in the drum 94 with the collar 84 or wrapped around the roof of the tank. When each bracket 80 reaches the upper end of the casing, it is removed from the multicore cable 60 while remaining loosely attached to the lifting cable T6. Therefore, the bracket 80 has a lifting cable connected to the winch 92.
When hoisted up, it can slide along the lifting cable.

As described above, maintenance personnel only need to focus on two cables. Moisture condensed on the conduit and grounding tube evaporates through the perforated sheath 68 of the multicore cable, and the sheath protects the tubes from damage when the maintenance type handles them. .

To re-insert the same or replaced motor/pump unit into the casing and lower it to the operating position:
The procedure described above may be reversed, except that the purge gas does not have to be reintroduced into the casing during the installation phase.

As described above, the present invention is applicable to, for example, U.S. Pat. No. 4,080,106 and U.S. Pat.
It has wide application for a variety of immersion pump devices, including those of the type shown in No. 35,132.

[Brief explanation of the drawing]

FIG. 1 shows a pump device according to the present invention and a motor/
2 is a schematic view of the adjacent points of the multicore cable and the lifting cable separated by spacer brackets; FIG. The cross-sectional views taken along line 3--3 of the Figures, Figures 4, 5, and 6 are schematic diagrams illustrating the various stages of removing the motor/pump unit. 10.Tank, 14..Casing, 1B.
...Head plate, 18...Ejection port, 20...
・・Gas inlet, 22@-・7-to valve, 24・・e・
Poppet, 2B・e・・Valve seat, 30・・・Motor/pump unit, 32・・・Pump, 34・・・・Motor, 40＠・・Inlet opening, 44・Φ・・Sealing Gland, 52... U-bolt and cross pin member, 56... Support cable, 60... Multicore cable, 62... e conduit, 64... Ground tube, 66
...Filling material, 68...Protective exterior, 70...
Connector, 76... Lifting cable, 80---
Bracket, 84...Collar, 86...Centering bracket, 88...Guide wheel. Patent Applicant GAC Carter Rikinbunny-Incoholated

Claims (7)

[Claims] (1) closed at the upper end by a removable head plate and extending downward into the reservoir below the level of the fluid contained under pressure, with an outlet at the top leading to the exterior of the reservoir; a fluid conveying casing having; a pump driven by an electrically energized motor and passing through the upper end of the casing to an operating position at the lower end of the casing and upwardly from this operating position; an integral unit having dimensions and configuration suitable for vertical movement therein; and in said operating position the pump draws fluid from a reservoir and discharges said fluid from its outlet through a casing. a flexible conduit and ground conduit extending from the electrically energized motor to a connector at the upper end of the casing; and from said integrated unit to the upper end of the casing for releasably connecting each to a lifting means. an extended lifting cable and a flexible support cable; a flexible sheath surrounding a majority of the length of the support cable and the conduit and grounding conduit to form a single multicore cable; The lower ends of the support cable, conduit and ground tube extend beyond their lower ends to connect to said integrated unit, and the upper ends of said support cable, conduit and ground tube are connected to said lifting means and said connector, respectively. a flexible sheath extending beyond an upper end thereof for connection; transversely separating and removably interconnecting said multicore cable and said lifting cable; and bracket devices arranged at separate locations along the length of the lifting cable. (2) A pump device according to claim 1, characterized in that the exterior has a small hole. (3) The pump device according to claim 2, wherein the exterior is made of a metallic mesh. (4) The pump device according to claim 1, wherein the bracket device loosely surrounds the multicore cable and firmly grips the lifting cable. (5) The device according to claim 4, which has a collar firmly gripping the multicore cable at a position close to the bracket device, and the portion between the collars of the multicore cable is connected to the bracket. 1. A pump device, wherein the pump device is vertically movable within the device, and wherein the collar is dimensioned to engage the bracket device. (6) an electrically energized motor/pump unit is located in a subsurface operating position at the bottom of the fluid transfer casing extending downward into the reservoir, and the flexible conduit and a grounding conduit extending from the pump/motor unit in the operating position to the upper end of the casing for connection to a power source and ground, and an elongated flexible support member and an elongated lifting member comprising a lifting means. In an immersion pumping device for pumping a cryogenic liquid from a reservoir, the pump/motor unit being in an operative position extends from a pump/motor unit to an upper end of the casing so as to be removably connected to the flexible tube; a support member disposed within a flexible sheath to form a multi-core cable; and a bracket removably connected to the multi-core cable to laterally separate the multi-core cable from the lifting member. A pump device comprising: (7) a removable head plate closed at its upper end and extending downward into a reservoir suitable for containing a fluid under pressure, having an outlet in its upper part leading to the outside of the reservoir; a fluid transfer casing having at its lower end a foot valve reversibly biased to a normally closed position separating the casing from the reservoir; a pump driven by an electrically energized motor; an integrated unit having a size and configuration suitable for passing through the upper end of the casing and moving up and down through the casing to and upwardly from the operating position; In a pumping device where, in position, the integral unit applies a force to the foot valve to open it, thus pumping fluid from the reservoir and out through the casing and out the outlet; electrically energized. a flexible conduit and ground conduit extending from the motor to a connector at the upper end of the casing; extending from the integral unit to a vertically movable member in the sealing gland extending through the head plate; the integrated unit is raised by the movable sealing gland member and the support cable to close the foot valve, after which fluid is purged from the casing and the head plate is removed; a flexible lifting cable extending from the integrated unit to the upper end of the casing for connection to a lifting mechanism for moving the integrated unit up and down; a flexible lifting cable extending from the integrated unit to the upper end of the casing; encircling to form a single multicore cable, and the lower ends of the support cable and the conduit and ground tube extend beyond the lower ends to connect with the integrated unit; The upper ends of the conduit and ground tube have a flexible, perforated sheath extending beyond the upper end to connect to the movable sealing gland member and the connector, respectively; comprising a bracket arrangement for laterally separating and removably interconnecting the core cable and said lifting cable and disposed at spaced apart positions along the length of said multicore cable and said lifting cable; Characteristic pump device.