JPS6026594B2 - Plug pressure feeding device for cleaning clogged objects in pipes - Google Patents

Description

[Detailed description of the invention] The present invention relates to a device for removing an intraductal obstruction.

More specifically, the present invention relates to a device for removing blockages by inserting and feeding a pipe cleaning plug into a pipe using pressurized fluid. Conventionally, when boilers, condensers, heat exchangers, multi-tubular reactors, pipelines, etc. are used for a certain period of time, the inside of the pipes become clogged with various blockages, such as resin blockages, and eventually become unusable. .

Therefore, it is necessary to clean the inside of the pipe by removing these blockages, but since the blockages are firmly fixed inside the pipe, cleaning and removing them is extremely difficult. Currently, methods for cleaning and removing such materials include a high-pressure jet water jet cleaning method, a mechanical drill cleaning method, and a burnt birch insertion combustion cleaning method. However, the high-pressure jet water cleaning method has the disadvantage of disposing of a large amount of dirty wastewater as it destroys and removes blockages with water jets.
In addition, in order to spray high-pressure water through a small hole, a large reaction force is generated in the opposite direction, causing fatigue and danger to workers, and there is a risk of injury if the sprayed water hits the human body. The problem is that high-pressure water does not destroy these substances, but only deforms them and does not remove them, and that large-scale equipment such as large-capacity water pressure pumps, high-pressure hoses, nozzles, etc. is required.

In addition, the mechanical drill cleaning method is difficult to implement when it comes to long objects because there is a limit to the length of the drill.
In addition, if you do not replace the drill bit with a smaller one and then a larger one, it will take time to clean because unreasonable force is applied to the drive side.Furthermore, since rubber-like substances cannot be cut, there is a risk that the drill bit will wrap around the drill bit and break. It has disadvantages in that it needs to be extracted from time to time, requires special machinery, has high equipment costs, and requires skill to handle.

Furthermore, the burner insertion combustion cleaning method cannot be applied to anything other than combustible materials, and since the blockage is burned with a red-hot iron rod, it is dangerous due to flames and hot oil spewing out. There is a problem with pollution due to the generation of black smoke, and there is also the disadvantage that combustion carbon remains in the pipe, which requires cleaning.

In order to eliminate these drawbacks of the conventional method, a hand-operated high pressure plug made of a self-retaining fiber material, a soft foam, a foamed elastic material with an abrasion-resistant skin, etc. is inserted into the pipe to be cleaned from one end. A method has been proposed in which a blockage in a pipe is removed from the end of the pipe by inserting an iron and passing it through using fluid pressure from a fluid gun (Japanese Patent Publication No. 46-39678,
Jitsukō 53-5 Paper No. 04 and Tokkō Sho 54 Yama 4897 Pi Publication).

However, such methods require greater fluid pressure if the obstruction is firmly attached within the tube. However, as the fluid pressure increases, in the case of a conventional hand-operated high-pressure fluid gun, the back pressure gradually increases, making it extremely difficult and dangerous to support it manually. The present invention has been made in order to eliminate the various drawbacks of the conventional methods as described above. a pressurized fluid injection gun body having means, a cylindrical back pressure chamber into which the distal end of the injection gun body is slidably inserted via the liquid tight means, and a fixing for the cylindrical back pressure chamber. 1 is a feeding device for a plug for cleaning an obstruction in a pipe, comprising means.

Next, an embodiment of the present invention will be described with reference to the drawings, taking as an example a case where a blockage in a pipe of a heat exchanger is removed.

That is, as shown in FIG. 1, the tip 2 of a cylindrical pressurized fluid injection gun body 3 is provided with a tip 2 that fits into a tube having an outer diameter slightly smaller than the inner diameter of the tube 1 to be cleaned. ni, 0
Attach liquid-tight means 4 such as a ring. Further, a liquid-tight means 6 such as a ring is attached to the distal end 5 of the coin body 3, and this is slidably inserted into the cylindrical back pressure chamber 7. This back pressure chamber 7 has a cylindrical shape, one end of which is closed, and a handle 48 is fixed to the cylindrical portion by screws, welding, or other means. On the other hand, a pressurized fluid inlet 9 is provided in the middle of the injection gun body 3. One end of a high-pressure flexible tube 11 is connected to this via a connection cap nut 10', and the other end is connected to a pressurized fluid source. , for example, an electric high-pressure plunger pump 13 driven by a motor 12,
Connected to a diaphragm pump, etc. On the other hand, tube plate 1
The bolt hole 15 of 4 has a predetermined length, that is, a length that almost matches the length when the injection gun body 3 is inserted into the pipe 1 and the back pressure chamber 7 is positioned. Insert one end of the bolt 17 inserted into the holding sleeve 16 of the machine, lock it with the nut 18, and then attach the machine to the injection gun fixing plate 1.
9, and lock it with the nut 21. The fixing plate 19 may be beam-shaped, but when cleaning a large number of pipes 1, a plate-shaped one is preferable since it saves the effort of setting the fixing plate 19. FIG. 2 shows another embodiment of the present invention, in which a distal end member having a different outer diameter is detachably attached to the distal end portion 2 of the injection gun body 3 in a device similar to that in FIG. 1. 22 is attached by screwing or other means, and this tip member 22 is provided with a liquid-tight means such as a circle. Therefore, the tip members 22 with different outer diameters
If several types are prepared, they can be used to remove obstructions in pipes of various internal diameters. Note that the same reference numerals in this figure as in FIG. 1 represent the same members. FIG. 3 shows still another embodiment of the present invention, in which the outer diameter of the distal end of the injection gun body 3 becomes smaller toward the distal end in a device similar to that shown in FIG. The 7-par structure 23 forms a liquid-tight means.

Therefore, with such a structure, even if inserted into a tube of any inner diameter, the inclined surface will come into contact with one end of the tube, making it liquid-tight. Note that the same reference numerals in this figure as in FIG. 1 represent the same villages. Next, the operation of the device according to the present invention will be explained.

First, as shown in FIG. 1, the bolt 17 is inserted into the bolt hole 15 of the tube sheet 14, one end of which is screwed and locked with a nut 18, and the bolt 17 is inserted into the holding sleeve 16 of a predetermined length. In addition, this bolt 17 is attached to the injection gun fixing plate 19.
Insert the two holes into the hole and screw on the nut 21 to lock it. Then, a plug 25 is inserted into the pipe 1 filled with the obstruction 24 to be cleaned. Furthermore, the injection gun main body 3 is moved into the back pressure chamber 7 by the handle 8, and the main body 3 and the back pressure chamber 7 are moved.
After adjusting the length of the injection gun constituted by and shortening it, insert the tip 2 of the injection gun main body 3 into the tube 1,
Next, when the back pressure chamber 7 is moved rearward using the handle 8 and is brought into contact with the fixing plate 19, the tube 1 and the injection gun body 3 become liquid-tight with the liquid-tight means 4 such as an O-ring. When the switch 26 is turned on, the motor 12 starts rotating.
The electric high-pressure plunger pump 13 is actuated by the power, and the pressurized fluid enters the pressurized fluid passage 27 of the injection gun body 3 from the high-pressure flexible tube 11 through the pressurized fluid inlet 9, and the fluid flowing backward is Although it flows into the pressure chamber 7 and presses the chamber wall, the back pressure chamber 7 is fixed by the reaction force of the fixing plate 19. In this case, there is no fear that the pressurized fluid will leak out due to the action of the liquid-tight means such as the O-ring and cylinder.
On the other hand, the fluid flowing forward (to the left in FIG. 1) is ejected from the tip of the injection gun body 3 and presses the plug 25, so that the plug 25 moves within the tube 1. For this reason, the pipe blockage 24 is discharged from the pond end (not shown) of the pipe 1 in the shape of, for example, a udon, so that when the plug 2'5 reaches the other end, the pressure force causes the pipe blockage 24 to be discharged. All will be removed. In this case, the pressurized fluid is water,
Although oil and the like can be used, water is preferred from the viewpoint of cost and waste liquid disposal. The pressure is appropriately selected depending on the difficulty of removing the blockage in the pipe, but is usually 0 to 300 kg/lump G, and is measured using a pressure gauge 27 to reach a predetermined pressure. In this case, the tube 1 and the injection gun body 3 are made liquid-tight by a liquid-tight means such as a ring as shown in Figs. 1 and 2, and a liquid-tight means by a tapered structure as shown in Fig. There is no need to worry about pressure fluid leaking outside. On the other hand, once removal is complete, the plug moves out of the pipe and the high pressure fluid pressure decreases.
Since this is immediately detected by the pressure gauge 28, the plunger pump 13 is stopped.

Since the pressure is removed by this, the back pressure chamber 7 can be easily moved to the side of the injection gun body 3 (to the left in Fig. 1) using the handle 8, so it is retracted and released from the fixed plate 19, and then the injection gun body 3 is moved to the side of the injection gun body 3. Remove it by pulling it out from 1. By repeating this operation in sequence, all the pipes 1 are cleaned.
4. As the plug used for removing the blockage in the pipe by the device of the present invention, any material can be used as long as it is flexible and does not allow pressurized fluid to flow through it. Examples include rubber, plastic, If there is a self-decomposing fibrous material (manila hemp, sisal hemp, etc.), or if there is a blockage that is strongly stuck to the pipe, a metal material is inserted between the flexible plugs 25 and 25 as shown in Figure 4. A brush cleaning plug 29 may also be used. In this case, the pressurized fluid injected from the tip of the injection gun body 3 presses the flexible plug 25 with its fluid pressure and pushes it forward (leftward in FIG. 4). Therefore, the movable plug 25 on the front side is mainly used for the intraductal obstruction 2
The brush cleaning plug 29 in the middle removes most of the blockage 24 stuck to the tube wall even after passing through the flexible plug 25. The flexible plug 25 on the rear side is mainly for receiving pressurized fluid and is for completely removing the obstruction in the brackets. No matter what kind of plug you use, if a blockage in the pipe reaches the end of the pipe and cannot be inserted into the pipe by pressing it by hand, clean the entrance of pipe 1 with a hand reamer, etc., and then remove the plug with a bale. Insert. As described above, the iron insertion and pressure feeding device for a plug for cleaning plugs in pipes according to the present invention has liquid-tight means at the tip and end parts, which are connected to a pressurized fluid source and are iron-fitted to the pipe to be cleaned. a pressurized fluid injection gun body, a cylindrical back pressure chamber into which a distal end of the injection gun body is slidably fitted with iron via the liquid-tight means, a fixing means for the cylindrical back pressure chamber; Even if a high-pressure fluid that cannot be used with a conventional hand-operated high-pressure fluid gun is used, it can be held sufficiently by the reaction force of the fixing means supported by the back pressure chamber. Therefore, the work is very easy and can be done with a small number of workers, which saves labor and is also safe.

Additionally, this device is compact, easy to move, and inexpensive to manufacture. The cylindrical back pressure chamber is slidably fitted with iron at one end of the injection gun body, making it easy to adjust the length of the gun and fixed by supporting the fixing means, while making it easy to remove after use. And it is easy to move. Further, because of the liquid-tight means provided at both ends of the injection gun body, there is no risk of leakage of the pressurized fluid to the outside except by flowing out from the tip and pushing the plug forward. Furthermore, when cleaning with the device of the present invention, a plug is used, so the pressurized fluid flowing out of the device is separated from the blockage by the plug, and therefore the amount of fluid is only within the pipe and is extremely small. Only a small amount is required. Furthermore, it is safe to use water as the pressurized fluid, and there is no problem in wastewater treatment. therefore,
Removal of rubber-like blockages, resin polymers, oil sludge, crystal precipitates, residual liquid, water scale, sludge, etc., which were previously difficult, is now much faster than before, and the removal cost is also significantly reduced. effective. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view showing one embodiment of the apparatus for removing an intraductal obstruction according to the present invention, FIGS. 2 and 3 are sectional views showing other embodiments, and FIG. It is a sectional view showing an example.

1...Tube, 3...Fluid injection gun body, 4
, 6... Secret means, 7... Back pressure chamber, 8...
Handle, 9... Pressurized fluid inlet, 14...
...Flange, 16...Sleeve, 17...Bolt, 18, 21...Nut, 19...Fixing plate, 24...
...Pipe obstruction, 25, 25'...Plug. Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Scope of Claims] 1. A pressurized fluid injection gun body whose intermediate portion is connected to a source of pressurized fluid and whose distal end portion and distal end portion, which are connected to a source of pressurized fluid and which fit into a pipe to be cleaned, are provided with liquid-tight means, respectively; A plug for cleaning an obstruction in a pipe, comprising a cylindrical back pressure chamber into which the distal end of the injection gun body is slidably inserted through a sealing means, and a fixing means for the cylindrical back pressure chamber. Pumping device. 2. The device according to claim 1, wherein the liquid tight means are O-rings fitted to each end of the injection gun body. 3. The device according to any one of claims 1 to 2, wherein the pressurized fluid is water. 4. The device according to claim 1, wherein the tubes to be cleaned are tubes of a shell-and-tube heat exchanger. 5. The device according to claim 1 or 4, wherein the cylindrical back pressure chamber fixing means is a plate body fixed to the tube sheet bolt hole of the multi-tubular heat exchanger via a bolt nut.