JPS6335833Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a liquid injection device that can be effectively used, for example, when treating sludge accumulated inside a floating roof type oil tank.

Tanks that store crude oil and other oils accumulate solid oil sludge inside them over a long period of time. This sludge must be removed because it reduces the internal volume of the tank or becomes a hindrance when maintaining and inspecting the tank.

In the sludge removal process, if the amount of sludge deposited is small, for example if the sludge is deposited below the height of the manhole at the bottom of the side wall of the tank, after removing the oil from inside the tank, open the manhole and remove the sludge. A sludge removal device can be carried into the tank through the manhole and removed. However, if the amount of accumulated sludge exceeds the height of the manhole, the manhole cannot be opened, making it difficult to remove the sludge. Also,
According to labor safety regulations, crude oil tanks are subject to organic solvent storage regulations because they contain components that are harmful to the human body, and data entry operations in the presence of crude oil are, in principle, prohibited for various safety reasons.

Therefore, when removing sludge from a tank, the most common method is to heat the sludge to a temperature higher than the fluidization temperature using various means to fluidize it, and then suck the fluidized sludge with a pump and discharge it to the outside of the tank. ing.

However, recently there are large oil tanks with an internal volume of 50,000 to 150,000 ^m3 , and 20,000 to 20,000 m3 inside.
As much as 50,000 Kl of sludge may accumulate, and heating this huge amount of sludge to above the flow temperature (50 to 70°C) requires an enormous amount of heat and heating time. Therefore, not only is there a great economic loss, but the work period is long, and the inside of the tank cannot be used during that time, and furthermore, it cannot be used if a heating source is not present.

Also, insert the flexible pipe into the oil tank,
A method in which the accumulated sludge is broken down and removed by pressurized oil spouted from the tip of the pipe is known, for example, from Japanese Patent Laid-Open No. 140260/1983.

However, in this method, the oil injection direction of the flexible pipe is unstable and the sludge cannot be broken down efficiently, so the working period is extremely long, and the method cannot meet the requirement of reliably processing all the sludge in a short period of time.

The inventors of this invention proposed that when sludge is highly accumulated inside the oil tank, the sludge is inserted into the oil tank in the form of a straight tube through some of the many pillar openings provided on the floating roof, and after insertion, the sludge is bent and inserted into the oil tank. liquid injection equipment effective for treating sludge,
It was previously disclosed in Japanese Patent Application Laid-open No. 57-68379, Japanese Patent Application Publication No. 57-110380, and Japanese Patent Application Publication No. 58-114783. These liquid ejecting devices have a simple structure, are easy to use, and can be bent at any angle.

However, although these liquid ejecting devices can arbitrarily change the direction of a nozzle that ejects liquid, they cannot eject liquid in a plurality of different directions at the same time. Therefore, it cannot be said that the liquid injection device has the highest efficiency in removing and dissolving the sludge adhering to the inside of the oil tank.

This invention was made based on the above-mentioned circumstances, and aims to provide a liquid injection device that can simultaneously inject liquid in multiple different directions and has high efficiency in dissolving and cleaning. .

Next, an embodiment of this invention will be described with reference to the drawings.

A liquid ejecting device 1 according to an embodiment of this invention includes:
As shown in FIG. 1, it consists of a long first cylindrical part 2 and a bendable second cylindrical part 4 connected to the lower end of the first cylindrical part 2 in an articulated manner by a connecting part 3.

A watertight outer frame 5 is attached to the upper outer periphery of the first cylindrical portion 2, and a fluid supply pipe 6 is connected to the outer frame 5. The inside of the outer frame 5 and the inside of the first cylindrical part 2 are defined by a vertically long through hole 7 opened above the first cylindrical part 2.
Communicate with... The first cylindrical body 2 is rotatable relative to the outer frame 5, and even if the outer frame 5 is fixed, for example, when the flange 8 provided at the upper end of the first cylindrical part 2 is operated, the first cylindrical body 2 is rotated relative to the outer frame 5. The cylinder part 2 can be rotated.

On the other hand, the second cylindrical part 4 has a first liquid injection nozzle 9 at its tip, and the base end of the second cylindrical part 4 and the lower end of the first cylindrical part 2 are connected in an articulated manner by a connecting part 3. do.

A second injection nozzle 24 is provided on the side surface of the second cylindrical portion 4 . The second injection nozzle 24 is a tubular body whose one end is connected to a nozzle hole 25 that penetrates the side surface of the second cylindrical portion 4 and extends toward the inside of the second cylindrical portion 4. A taper-shaped liquid sampling port 26 is formed at the other end located inside the cylinder portion 4, and the liquid sampling port 26 is opened toward the upstream side of the liquid, so that the liquid sampling port 26 and the nozzle hole 25 are connected. There is a liquid sampling port 2 in between.
A rectifying section 27 is provided to rectify the liquid taken in from 6. The rectifier 27 can be configured by, for example, arranging a plurality of radial rectifier plates around the center line of the flow pipe within the flow pipe between the liquid sampling port 26 and the nozzle hole 25. In addition, the nozzle hole 25
By making the diameter smaller than the inner diameter of the straightening section 27, the injection force from the second injection nozzle 24 can be further increased. Therefore, the second injection nozzle 24 configured as described above rectifies the flow of the fluid taken in from the liquid sampling port 26 with the rectifier 27 to remove turbulent flow, and the flow is smaller than the inner diameter of the rectifier 27. High-pressure fluid can be injected toward the side of the second cylindrical portion 4 from the nozzle hole 25 having an inner diameter.

On the other hand, as a specific structure of the connecting part 3, for example, as shown in FIGS. 2 and 3, the lower end of the first cylindrical part 2 and the second
Closing parts 10 and 10' that are inclined with respect to the axial direction of each cylinder part are provided at the base end of the cylinder part 4, respectively, and each closing part 10,
10' is formed with short annular parts 11, 11' facing outward, and flanged end face parts 12, 12' formed at the tips of each annular part 11, 11' are brought into surface contact and rotatably supported. It is. Each end face part 12,1
Since the surface of 2' is inclined similarly to the inclined closing parts 10, 10', the end face part 12' of the second cylinder part 4 rubs against the end face part 12 of the first cylinder part 2 while in surface contact. When rotated together, the second cylindrical portion 2 rotates with the connecting portion 3 as the base end in accordance with the inclination state of the end surface portion (closing portion). Therefore, the first cylindrical part 2 and the second cylindrical part 4 can have a straight pipe shape as shown in FIG.
It can also have a bent shape as shown in FIG.

In the above configuration, if the end face part 12 is inclined by α degree (45°) with respect to the axial direction of the first cylinder part 2, and the end face part 12' is also inclined in the same way, the second cylinder part 4 is It is bent to β degrees (90 degrees) with respect to the cylindrical portion 2.
Also, if α becomes 30 degrees, β will become 60 degrees, so the second
The cylindrical portion 4 is bent obliquely upward.

The first cylindrical part 2 and the second cylindrical part 4 have a retaining ring attached to the outer periphery of the overlapping end surfaces 12 and 12'.
Connect by fitting 3. This retaining ring 1
As shown in FIG.
Grooves 15, 15' are formed on the inner surface of the groove 4' into which the overlapping end surfaces 12, 12' are fitted, and fastening pieces 16, 16' are provided at each end to protrude outward. Therefore, after the end surfaces 12, 12' of each cylinder are brought into surface contact and overlapped, the frames 14, 14' are applied from the left and right, and the outer circumferences of both end surfaces are fitted into the respective grooves 15, 15', and the opposing fastenings are made. 1 bolt on pieces 16 and 16'
7 and is strongly tightened with a nut 18, the first cylindrical part 2 and the second cylindrical part 4 are internally communicated and connected watertightly and rotatably.

In the above configuration, in order to rotate the second cylindrical portion 4, the operating rod 19 passed through the center of the first cylindrical portion 2 is used.
All you have to do is rotate. The operating rod 19 has an upper end protruding from the upper end of the first cylindrical portion 2 and can be rotated by a handle (not shown) or the like, and a lower end reaching the connecting portion 3. The inner surface of the second cylindrical portion 4 has a diagonal fixing rod 20 extending to the connecting portion 3, and the lower end of the operating rod 19 and the tip of the fixing rod 20 are connected by a flexible joint 21.
According to the illustrated embodiment, this flexible joint 21 connects one end of the connecting member 22 and the lower end of the operating rod 19, and the other end of the connecting member 22 and the tip of the fixed rod 20 via rotators 23. When the operating rod 19 rotates, the connecting member 22 rotates, so the fixed rod 20 tilts, and the second cylindrical portion 4 rotates and tilts due to the friction caused by surface contact between the end surfaces 12 and 12'. do. Therefore, by rotating the operating rod 19, the second cylindrical part 4 can be set at any angle with respect to the first cylindrical part 2, and can be changed to a straight pipe shape or a right angle shape bent at 90 degrees. No matter what state it is in, the first cylindrical part 2 and the second
The inside communicates with the cylindrical portion 4.

The above-mentioned flexible joint 21 is just one example; for example, when one rod is rotated, the angle of the other rod changes, such as an elastic joint made of a coil spring with strong tension or a pin joint in which a pin is fitted into a slot. Any type of joint can be used.

In order to discharge the sludge b accumulated inside the floating roof type oil tank a by using the liquid injection device 1 constructed as described above, for example, as shown in FIG. The cylindrical portion 4 is shaped into a straight tube and inserted into the post opening d provided in the floating roof c, and the mounting frame 5' extending downward from the outer frame 5 is fitted into the cylindrical portion d' of the post opening d from above. Then, tighten the lock bolts 28 to the outer surface of the cylindrical portion d' from the outside of the mounting frame 5'. In this state, the first cylindrical portion 2 and the second cylindrical portion 4 are hanging down from the floating roof c into the oil tank a, so rotate the operating rod 19 to bend the second cylindrical portion 4 at an appropriate angle. let After the liquid injection device 1 is attached to a suitable support port in this way, the first cylinder part 2 is rotated at a low speed while the cleaning liquid is forced into the first cylinder part 2 from the supply pipe 6. Then, the first injection nozzle 9 and the second injection nozzle 24 rotate while simultaneously injecting the cleaning liquid in two directions at high pressure. Due to this injection pressure, the sludge b inside the tank collapses, dissolves, and becomes fluidized, so that the liquefied liquid is discharged out of the tank by the pump e. In particular, when the second injection nozzle 24 is provided at a position close to the closing part 10' on an arbitrary circumference on the side surface of the second cylindrical part 4,
By bending the second cylindrical portion 4 in the horizontal direction, the cleaning liquid can be jetted horizontally from the first injection nozzle 9 and at the same time the cleaning liquid can be jetted upward from the second injection nozzle 24. Sludge adhering to the side surfaces and the lower surface of the floating roof c can be melted and removed at the same time. Since the second injection nozzle 24 is provided with the rectifying part 27, the liquid injected from the second injection nozzle 24 is linear, and a sufficient amount of liquid is collected from the trumpet-shaped liquid sampling port 26. Strong disintegrating power and cleaning power can be obtained. Note that if the second injection nozzle 24 does not have the rectifying part 27, the liquid will be ejected in a horizontally diffused state, and therefore sufficient disintegration power and cleaning power cannot be expected.

Although one embodiment of this invention has been described in detail above, this invention is not limited to the above embodiment, and it goes without saying that it can be implemented with appropriate modifications within the scope of the gist of this invention. Nor.

The number of second injection nozzles is not limited to one, and a plurality of second injection nozzles may be provided. When the number of second injection nozzles is two or more, liquid can be ejected in multiple directions.

According to this invention, the liquid can be jetted out at high pressure from the second jet nozzle in a direction perpendicular to the jet direction of the first jet nozzle, so that, for example, it is possible to simultaneously clean the circumferential side and the ceiling of the tank. Therefore, the cleaning efficiency of the liquid jet device can be further improved. Moreover, in the present invention, the liquid sampling port of the second injection nozzle is shaped like a rudder and opens toward the upstream side of the liquid, so that a sufficient amount of liquid can be collected into the second injection nozzle, and the liquid is rectified in the middle. Since a section is provided, the flow of the collected liquid can be rectified. Therefore, the high-pressure liquid can be injected in a straight line from the nozzle hole opened on the circumferential side of the cylinder without being diffused. Therefore, even if the cylindrical body is thin, strong disintegration power and cleaning power can be obtained.

In addition, in this invention, the second injection nozzle extends inside the cylindrical body, and nothing protrudes from the outside of the cylindrical body, so it can be used in small openings such as the floating roof support opening of a floating roof type oil tank. Also when inserting the cylindrical body, the second
The injection nozzle does not get caught on the opening edge of the post opening and can be taken in and out smoothly.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a longitudinal sectional view, FIG. 2 is a sectional view of a straight pipe-like main part, FIG. 3 is a cross-sectional view of a bent main part, and FIG. 4 is a frame. FIG. 5 is an exploded perspective view of the body, and FIG. 5 is a schematic front view when attached to an oil tank. 1...Liquid injection device, 2...First cylindrical portion, 3...
Connecting part, 4... Second cylindrical part, 12, 12'... End face part, 19... Operation rod, 20... Fixed rod,
21...Flexible joint, 24...Second
Injection nozzle, 25... nozzle hole, 26... liquid sampling port, 27... rectifier.

Claims (1)

[Scope of claim for utility model registration] (1) A liquid injection device that injects high-pressure liquid from a first injection nozzle formed at the tip of a long cylindrical body, in which a nozzle hole is provided on the circumferential side near the tip of the cylindrical body. One end of a tubular second injection nozzle extending toward the inside of the cylinder is connected to the nozzle hole, and a lug-shaped liquid sampling port is formed at the other end of the second injection nozzle located inside the cylinder. is opened toward the upstream side of the liquid, and a rectifying part for rectifying the liquid taken from the liquid sampling port is provided in the second injection nozzle between the liquid sampling port and the nozzle hole, and A high-pressure liquid is injected from one injection nozzle to the front of the cylinder, and a part of the high-pressure liquid is also injected toward the side of the cylinder from a nozzle hole opened on the circumferential side of the cylinder. liquid injection device. (2) The liquid ejecting device according to claim 1, wherein the vicinity of the tip of the cylindrical body including the first and second ejecting nozzles is bendable.