JP2008248854A - Liquid reservoir facility - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide liquid reservoir facilities capable of preventing calcium carbonate from depositing and building up on a motor part casing outer circumference part of a pump motor with a simple structure. <P>SOLUTION: The liquid reservoir facilities are provided with a pump motor 23 arranged in a liquid reservoir tank provided in a rock bed underground, feed liquid (specified liquid) 11 stored in the liquid reservoir tank by the pump motor 23, and cool the motor part 21 by the fed liquid. A chemicals feed pipe 40 feeding chemicals preventing deposition of Ca component flowing out of a wall surface of the liquid reservoir tank is provided, and a chemicals delivery port 40a of the chemicals feed pipe 40 is arrange at the lowermost end part of the pump motor 23 or below the lowermost part. A protection pipe 20 is arranged with surrounding a pump motor outer periphery. A partition pipe 43 is arranged between an outer circumference surface of the motor part 21 and an inner circumference surface of the protection pipe 20. The specified liquid 11 mixed with chemicals flows through a part between the outer circumference surface of the motor part 21 and the inner circumference surface of the protection pipe 20. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a liquid storage facility for storing a liquid such as petroleum or LPG in a liquid storage tank provided in a rock basement, and in particular, a motor unit of a pump motor installed in the liquid storage tank is sent from the liquid storage tank. The present invention relates to a liquid storage facility configured to be cooled by liquid feeding.

  FIG. 1 is a diagram showing a configuration example of a liquid storage facility in which a pump motor is installed in a liquid storage tank provided in the basement of the rock. A liquid storage tank 1 for storing a liquid such as oil or LPG is provided by excavating a bedrock layer 2, and bottom water (ground water or the like) 10 is introduced into the bottom 3, and petroleum or LPG or the like is placed above the bottom water 10. Liquid (hereinafter referred to as “specification liquid”) 11 is stored. A cylindrical protective tube 20 extending in the vertical direction is installed in the liquid storage tank 1, and a pump motor 23 including a motor unit 21 and a pump unit 22 is disposed in the protective tube 20. A pumping pipe 24 is connected to the discharge port of the pump unit 22 of the pump motor 23.

  The protective tube 20 protrudes to the ground, and a head plate 25 is attached to the upper end and is closed. The pumping pipe 24 penetrates the head plate 25, and an upper end thereof serves as a discharge port 26. A plug (closed body) 6 and a sealing portion 7 are provided in a portion where the protective tube 20 penetrates the rock layer 2, and the space between the protective tube 20 and the rock layer 2 is sealed and stored in the liquid storage tank 1. This prevents gas such as petroleum and LPG from gasifying and leaking to the ground.

  On the other hand, a skirt 8 erected on the bottom 3 of the liquid reservoir 1 is provided around the lower end of the protective tube 20. The height of the skirt 8 is set so that the upper end portion 8a is higher than the upper surface of the bottom water 10 in a normal state, and the bottom water 10 flows around the lower end opening of the protective tube 20 by the skirt 8. It is supposed not to. The periphery of the lower end opening of the protective tube 20 is filled with the specification liquid 11. A check valve mechanism 30 is provided at the lower end of the pump motor 23 via a short pipe 27, and a seal mechanism 31 is provided between the outer periphery of the lower end opening of the protective tube 20 and the inner periphery of the lower end of the protective tube 20. ing.

  In the liquid storage facility having the above-described configuration, the check valve mechanism 30 is opened in the storage liquid discharge operation or in the standby state (the valve is opened by a pressurizing mechanism such as hydraulic pressure, and the pressure is removed or reduced when necessary to close the valve. ) By operating the pump motor 23, the specification liquid 11 flows into the check valve mechanism 30, flows out from the opening 27 a of the short tube 27 into the protective tube 20, and is sucked from the suction port 22 a of the pump unit 22 of the pump motor 23. Then, the liquid is fed to a predetermined place on the ground through the liquid pump 24. At this time, the specification liquid comes into contact with the outer periphery of the casing of the motor unit 21 of the pump motor 23, heat exchange is performed between the specification liquid and the casing, and the motor unit 21 is cooled.

  When storing liquid such as petroleum or LPG in the liquid storage tank 1 provided in the basement of the rock as described above, the inner wall surface of the liquid storage tank 1 is used to prevent the liquid from leaking or to prevent the rock from peeling. A concrete reinforcing layer (not shown) is applied to the steel, and a large amount of Ca outflow is expected from the concrete reinforcing layer. When the stored liquid in the liquid storage tank 1 has a Ph state (high alkalinity) and a large amount of Ca, calcium carbonate and the like are likely to precipitate. Precipitation of carbonic acid carbonate or the like causes deposits to adhere to a rotating sliding portion such as a mechanical seal portion of the rotating machine, or a portion having a gap is buried, thereby impairing the function as the rotating machine.

Therefore, a chemical solution injection part is provided in a rotary sliding part such as a mechanical seal (not shown) installed between the motor unit 21 and the pump unit 22 of the pump motor 23, and precipitation of calcium carbonate or the like from the chemical solution injection pipe 40 is performed. The chemical | medical solution 41 to prevent is inject | poured and calcium carbonate etc. precipitate on rotation sliding parts, such as a mechanical seal part, and it prevents that a deposit adheres.
JP 2006-061797 A JP 2006-226335 A

  In the liquid storage facility, not only the rotary sliding part of the pump motor 23 but also the casing surface of the motor part 21 in contact with the specification liquid 11 having an important function for cooling the motor part 21 is not limited to calcium carbonate or the like. There is a problem that deposits adhere. Thus, when deposits with low thermal conductivity such as calcium carbonate adhere to the casing surface, the heat exchange function between the motor unit 21 and the specification liquid 11 gradually decreases. In particular, when the motor unit 21 adopts a sealed water-sealed self-circulating cooling system, the original heat exchange function is hindered, and in the worst case, the motor coil is burned out.

  The present invention has been made in view of the above points, and provides a liquid storage facility that can prevent calcium carbonate from being deposited and deposited on the outer periphery of a motor motor casing of a pump motor with a simple configuration. Objective.

  In order to solve the above-mentioned problem, the invention described in claim 1 is provided with a liquid storage tank provided in the bedrock basement, a pump motor disposed in the liquid storage tank, and a liquid stored in the liquid storage tank. A liquid storage facility configured to supply liquid by the pump motor and cool at least a motor portion of the pump motor by the liquid supply, and prevents precipitation of Ca component flowing out from the wall surface of the liquid storage tank. A chemical solution injection tube for injecting a chemical solution is provided, and a chemical solution discharge port of the chemical solution injection tube is arranged at the lowermost end portion of the pump motor or below the lowermost end portion.

  According to a second aspect of the present invention, in the liquid storage facility according to the first aspect, a protective pipe is disposed so as to surround the outer periphery of the pump motor. It is configured to flow between the inner peripheral surfaces of the protective tube, and the chemical solution discharge port of the chemical solution injection tube is disposed at the lowermost end portion of the pump motor in the protective tube or below the lowermost end portion. And

  According to a third aspect of the present invention, in the liquid storage facility according to the second aspect, a partition pipe is disposed between the outer peripheral surface of the motor portion of the pump motor and the inner peripheral surface of the protective tube, and is discharged from the chemical liquid injection pipe. The liquid feed mixed with the chemical solution is configured to flow between the outer peripheral surface of the motor portion and the inner peripheral surface of the protective tube.

  According to a fourth aspect of the present invention, in the liquid storage facility according to the third aspect, the lower end portion in the partition pipe is configured to cover the chemical liquid discharge port of the chemical liquid injection pipe.

  According to a fifth aspect of the present invention, in the liquid storage facility according to the third or fourth aspect, the material of the partition pipe is a material that is more easily corroded than the material of the material constituting the outer peripheral surface of the motor portion of the pump motor. It is characterized by that.

  According to a sixth aspect of the present invention, in the liquid storage facility according to any one of the third to fifth aspects, the outer peripheral surface of the motor portion of the pump motor is formed smoothly.

  The invention according to claim 7 is the liquid storage facility according to any one of claims 1 to 6, wherein the liquid stored in the liquid storage tank is petroleum or LPG.

  According to invention of Claim 1 and 2, Since the chemical | medical solution discharge port of the chemical | medical solution injection pipe | tube has been arrange | positioned below the lowest end part or lowermost part of the motor part of a pump motor, the chemical | medical solution which prevents precipitation of Ca content Will be poured into the lowermost part of the motor part or the specification liquid below the lowermost part, and the liquid mixture (specification liquid) mixed with the chemical will rise while coming into contact with the outer surface of the casing of the motor part. It can suppress that deposits, such as a calcium carbonate, adhere to the outer surface of this casing. Therefore, it is possible to maintain a good heat exchange action between the motor portion of the pump motor and the liquid feeding over a long period of time, and it is possible to prevent accidents such as burnout due to heat generation of the motor portion.

  According to the third aspect of the present invention, the partition pipe is disposed between the outer peripheral surface portion of the motor portion of the pump motor and the inner peripheral portion of the protective tube, and the liquid feed mixed with the chemical solution discharged from the chemical injection tube is the outer peripheral portion of the motor portion. Since the liquid solution mixed with the chemical solution contacts the outer periphery of the motor portion, precipitation of calcium carbonate and the like is suppressed, and the motor of the precipitate is prevented. Adhesion to the outer peripheral surface of the part can also be suppressed.

  According to the invention described in claim 4, since the lower end portion in the partition pipe is configured to cover the chemical liquid discharge port of the chemical liquid injection pipe, the liquid feed mixed with the chemical liquid is effectively transferred to the outer periphery of the motor section and the partition pipe. It will flow between circumferences, and adhesion of deposits, such as a carbonic acid calcium carbonate, to the motor part casing surface can be controlled.

  According to the fifth aspect of the present invention, the partition pipe is made of a material that is more easily corroded than the material of the outer peripheral surface of the motor part of the pump motor, and therefore deposits such as calcium carbonate adhere from the outer periphery of the motor part. As a result, adhesion of precipitates to the outer periphery of the motor unit is suppressed.

  According to the sixth aspect of the present invention, since the outer peripheral surface of the motor part of the pump motor is formed smoothly, the deposition of precipitates such as calcium carbonate on the outer periphery of the motor part is suppressed.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 is a diagram illustrating a configuration example of a pump motor unit of the liquid storage facility according to the present invention. Note that the schematic configuration of the liquid storage facility is the same as that of the liquid storage facility shown in FIG. 2, the same reference numerals as those in FIG. 1 denote the same or corresponding parts. As shown in the figure, the chemical solution discharge port 40 a of the chemical solution injection pipe 40 is arranged at the lowermost end portion of the pump motor 23. In the drawing, the pump motor 23 is disposed in the vicinity of the opening 27 a of the short pipe 27 disposed below the lowermost end portion of the motor portion 21. A partition pipe 43 is disposed on the outer peripheral portion of the motor portion 21 of the pump motor 23 via a stay 42.

  By operating the pump motor 23, the specification liquid 11 flows into the check valve mechanism 30, and the specification liquid flows into the protective tube 20 from the opening 27 a of the short tube 27, and a part of the outer periphery of the partition tube 43. Between the inner peripheral surface of the protective tube 20 and the suction port 22a of the pump unit 22. In addition, the specification liquid mixed with the chemical liquid 41 discharged from the chemical liquid discharge port 40 a flows between the casing outer peripheral surface of the motor unit 21 and the inner peripheral surface of the partition pipe 43 and flows into the suction port 22 a of the pump unit 22. As a result, the specification liquid mixed with the chemical liquid 41 comes into contact with the outer peripheral surface of the casing of the motor unit 21, and deposition of calcium carbonate or the like on the outer peripheral surface of the casing can be suppressed.

  The partition tube 43 is attached to improve the cooling action of the motor unit 21 by allowing the specification liquid to sufficiently flow around the outer periphery of the motor unit 21. Therefore, the shape of the partition tube 43 is such that the tip portion 43a of the partition tube 43 is injected with the chemical solution so that the specification liquid mixed with the chemical solution discharged from the chemical solution discharge port 40a of the chemical solution injection tube 40 flows easily to the outer periphery of the motor unit 21. It has a shape that wraps around the chemical solution outlet 40 a of the tube 40. The partition pipe 43 is made of a material that is more easily corroded than the casing material of the motor portion 21 of the pump motor 23, and the casing material of the motor portion 21 is made of a material that is not easily rusted such as stainless steel, and the surface thereof is processed smoothly.

  Here, the reason why the partition pipe 43 is made to be more easily corroded than the casing material of the motor unit 21 is that the easily corroded material is faster in depositing precipitates such as calcium carbonate as compared with stainless steel. Moreover, the reason why the surface of the casing of the motor unit 21 is smoothly processed is that precipitates such as calcium carbonate are difficult to adhere. As a result, precipitates such as calcium carbonate do not adhere as much as possible to the outer surface of the casing of the motor section 21 of the pump motor 23, and a good heat exchange function between the specification liquid and the motor section 21 is maintained for a long time. The part 21 is efficiently cooled. This is particularly effective when the sealed water-sealed self-circulating cooling system is adopted for the motor unit 21.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea described in the claims and the specification and drawings. Is possible. In the liquid storage facility according to the present invention, the liquid to be stored is mainly LPG and petroleum (crude oil), but the liquid may be ground water, geothermal water, or the like, and similar effects can be expected.

It is a figure which shows the schematic structural example of the liquid storage equipment provided in the bedrock basement. It is a figure which shows the schematic structural example of the pump motor part of the liquid storage equipment which concerns on this invention.

Explanation of symbols

1 Liquid storage tank 2 Rock bed layer 3 Bottom 6 Plug (closed body)
DESCRIPTION OF SYMBOLS 7 Sealing part 8 Skirt 10 Bottom water 11 Specification liquid 20 Protection pipe 21 Motor part 22 Pump part 23 Pump motor 24 Lifting pipe 25 Head plate 26 Outlet 27 Short pipe 30 Check valve mechanism 31 Sealing mechanism 40 Chemical solution injection pipe 41 Chemical solution 42 Stay 43 Partition tube

Claims (7)

A liquid storage tank provided in the basement of the rock, and a pump motor disposed in the liquid storage tank. A liquid storage facility configured to cool a motor portion of a motor,
A chemical solution injection pipe for injecting a chemical solution for preventing the Ca component flowing out from the wall surface of the liquid storage tank from being deposited;
A liquid storage facility, wherein a chemical liquid discharge port of the chemical liquid injection pipe is disposed at a lowermost end portion of the pump motor or below the lowermost end portion. The liquid storage facility according to claim 1,
A protective tube is disposed around the outer periphery of the pump motor,
The liquid feeding is configured to flow between the outer peripheral surface of the motor part of the pump motor and the inner peripheral surface of the protective tube,
The liquid storage facility, wherein the chemical liquid discharge port of the chemical liquid injection pipe is disposed at a lowermost end portion of the pump motor in the protective tube or below the lowermost end portion. The liquid storage facility according to claim 2,
A partition pipe is arranged between the outer peripheral surface of the motor part of the pump motor and the inner peripheral surface of the protective tube, and the liquid feed mixed with the chemical liquid discharged from the chemical liquid injection pipe is the outer peripheral surface of the motor part and the inner peripheral surface of the protective tube. A liquid storage facility characterized by being configured to flow between the two. The liquid storage facility according to claim 3,
A liquid storage facility, wherein a lower end portion of the partition pipe is configured to cover a chemical liquid discharge port of the chemical liquid injection pipe. In the liquid storage facility according to claim 3 or 4,
The liquid storage equipment according to claim 1, wherein the partition pipe is made of a material that is more easily corroded than the material of the outer peripheral surface of the motor portion of the pump motor. In the liquid storage equipment described in any one of claims 3 to 5,
The liquid storage facility, wherein the outer peripheral surface of the motor part of the pump motor is formed smoothly. In the liquid storage equipment according to any one of claims 1 to 6,
A liquid storage facility, wherein the liquid stored in the liquid storage tank is petroleum or LPG.

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