JPH0214791A - Apparatus for washing pipe - Google Patents

Abstract

PURPOSE:To effectively wash the insides of pipes by connecting a pulse generator for generating pulsating pressure to the fluid source sides of the pipes in a branched state and also connecting a gas blower for blowing gas to the fluid source sides in a branched state. CONSTITUTION:A pulse generator 1 for generating pulsating pressure is connected to the fluid source sides of pipes 20, 21 to be washed in a branched state. A gas blower 5 for blowing gas is also connected to the fluid source sides in a branched state. By using the resulting relatively simple apparatus, the insides of the pipes can be washed without requiring man power. When the pulse generator is previously programmed to make the pulse interval, etc., optimum, washing can be efficiently and automatically carried out.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a pipe cleaning device that is used for pipe parts constituting land use, marine wave breaking, and others.

[Conventional technology]

Oil pipes exist to supply lubricating oil to land and marine machinery, but if the inside of these pipes is contaminated with rust, scale, etc., this can contaminate bearings and other parts, leading to serious accidents. In order to prevent this, conventional technology uses a hammer 2 to strike the oil in the piping 1 before oil passes through the oil pipe 1 to the bearing, as shown in Figures 2(a) and 2(b). Flushing inside the piping was done by swinging it up and down.

[Problems to be Solved by the Invention] In the above-mentioned conventional technology, whether it is hitting with a hammer or swinging the oil temperature, it always has to be done manually. In addition, when performing oil temperature swing, separate equipment such as steam and heaters must be provided.

[Means to solve the problem] The present invention takes the following measures to solve the above problems.

In other words, the piping/jc cleaning device includes a pulse generator that is connected to a branch from the fluid source side of the piping to be cleaned and generates pulsating pressure, and a gas injection device that is also connected to the fluid source side and injects gas. and.

[Operation] When the above means is used to pulsate the fluid pressure flowing inside the pipe to be cleaned during cleaning and apply an excitation force to the pipe to cause the pipe to vibrate, scale and dirt are removed by the vibration. .

Moreover, when gas is injected at the same time to create a two-layer flow of fluid and gas, the cleaning effect is enhanced by its cleaning action.

〔Example〕

An embodiment of the present invention will be explained with reference to FIG.

Typically, a turbine plant is equipped with two systems of first piping 20 and second piping 21 each having a high-pressure pump and a low-pressure pump.

The high-pressure pump 12 is driven by a hydraulic pump 25, and a first pipe 20 is connected to its discharge side. Similarly, the low pressure pump 13 is driven by a hydraulic pump 25 and is connected to the second pipe 21.

Further, the first pulse tube 26 and the second pulse tube 27, which are branched from the fluid source side of the first piping 20 and the second piping 21 to be cleaned, that is, near the high-pressure pump 12 and the low-pressure pump 13, are hydraulically operated double It is connected to a first port 2a and a second port 2a' of a port valve type pulse generator 2. Further, the first outlet 2b and the second outlet 2b' are respectively connected to the one dollar valve 4.
and is connected to the drain via the second needle valve 4'. Further, the first port 3a of the four-port two-way switching valve type solenoid valve 3 is connected by a hydraulic pipe 28 branching from the fluid source side of the first pipe 20. Furthermore, the 103C and 203d are connected to the first working pressure port 2c and the second working pressure port 2d of the pulse generator 2, respectively. Moreover, the outlet 3b is connected to a drain.

The pulse generator 1 includes these pulse generators 2 and solenoid valves 3.
Consists of etc.

On the other hand, the compressed air supply pipe 31 passes through the first check valve 9
It is connected to the inlet lower a of the air receiver 7, and its first outlet lower b passes through the second freezing pressure valve 8, and then the inlet 9a of the second air receiver 9.
connected to. In addition, the first pulse tube 26 and the second pulse tube 2
A first air pipe 29 and a second air pipe 3 branch from the downstream side of 7.
0 through the first check valve 9 and the second check valve 10, respectively.
Second output lower c of air receiver 7 and second air receiver 9
is connected to outlet 9b of.

The gas injection device 5 includes the compressed air supply pipe 31, the first pressure reducing valve 6, the second pressure reducing valve 8, the first air receiver 7, the second air receiver 9, and the like.

In the above configuration, when the solenoid valve 3 is operated at a predetermined cycle, the high pressure oil in the first pipe 20 is guided to the right or left chamber of the piston 13 in the pulse generator 2 via the hydraulic pipe 28. Piston 13 moves to the left or right. For example, when the piston 13 moves to the right, the first outlet 2b and the second outlet 2b
' are respectively closed and opened by the piston 13, the oil pressure in the first pipe 20 is maintained at high pressure P, and the oil pressure in the second pipe 21 flows out as drain from the second outlet 2b' via the second needle valve 4'. As a result, the pressure becomes low pressure PL'. That is, the pressures in the first pipe 20 and the second pipe 21 become P and p% as shown in FIG. 1A and B, respectively. Conversely, when the piston 13 moves to the left, P++'(<Pu)
and P, (>PL'). P,' and PL' are set by the opening degrees of the first needle valve 4 and the second needle valve 4', respectively.

In this way, the first pipe 20 and the second pipe 21 are vibrated by the pulsating pressure, and scale and the like are removed.

On the other hand, air is injected into the pipe by the gas injection device 5 in parallel with the change in oil pressure, and the two-layer flow of air and oil enhances the cleaning effect. That is, before operation, the first relative pressure valve 6 and the second pressure reducing valve 8 are
The air pressure in the first air receiver 7 and the second air receiver 9 is adjusted to the oil pressure P of the first pipe 20 and the second pipe 21, respectively.
The oil pressure is set to be maintained at PL.

Next, when the pulse generator (■) operates and the oil pressure in the first pipe 20 drops from PM to PH', the air in the first air receiver 7 overcomes the first check valve 9 and automatically flows into the first pipe 20. When the oil pressure returns from PM' to the original P, the first reverse valve 9 stops the air injection. Second piping 2
The first side also works in the same way.

In other words, air is automatically injected in pulses in conjunction with pulse-like oil pressure changes, making it possible to effectively clean the inside of the pipe.

Although the above description has been applied to two systems, it is clear that the method may be applied to one system or other multiple systems.

〔Effect of the invention〕

As explained above, according to the present invention, it becomes possible to clean the inside of the pipe unattended with a relatively simple device. and,
If the pulse interval of the pulse generator is programmed in advance to be optimal, pipe cleaning can be carried out efficiently and automatically.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of an embodiment of the present invention, (a) is an explanatory diagram of a conventional example. 1-pulse generator, 3-...Solenoid valve, 4′-second needle valve; 6-.-first pressure reducing valve, 8-second pressure reducing valve; 10-first check valve, 12-High pressure pump, 13- Piston, 21-Second piping; 26--first pulse tube; 28 -- Hydraulic pipe, 30-Second air pipe, 2--Pulse generator, 4.-First, the dollar valve; 5-Gas injection device, 7-first air receiver; 9.-second air receiver, 11-second check valve; 13-Low pressure pump, 20-first piping, 25-hydraulic pump, 27.-second pulse tube, 29-first air pipe; 31--Compressed air supply piping. Figure 2(a).

Claims (1)

[Claims] It is characterized by comprising a pulse generator that is branched off and connected from the fluid source side of the piping to be cleaned and generates pulsating pressure, and a gas injection device that is also branched off and connected from the fluid source side and injects gas. Piping cleaning equipment.