KR20110002914A - An ice-plugging for pipe isolation and process thereof - Google Patents

Abstract

PURPOSE: A pipe ice-plugging device and an ice-plugging method thereof are provided to facilitate the freezing of pipes since refrigerant is automatically supplied to a wrapping tube. CONSTITUTION: A device for freezing the front end and rear end of a pipe(10) comprises a wrapping tube(30), a holder(40), a cooling jacket(50), a supply tube(60), a storage tank(70), and a stop valve(80). The wrapping tube comprises multiple injection nozzles and is wrapped in the both ends of the circumference of a pipe. The injection nozzle sprays refrigerant and freezes water flowing in the front-end and back-end of the pipe. The holder clinches both ends of the wrapping tube on the pipe. The cooling jacket coats and cools the wrapping tube fixed by the holder. The supply tube connects to the wrapping tube and supplies refrigerant to the wrapping tube. The storage tank is connected to the supply tube and stores the refrigerant. The stop valve controls the flow of the refrigerant stored in the storage tank.

Description

Pipe frosting device and its freezing method {AN ICE-PLUGGING FOR PIPE ISOLATION AND PROCESS THEREOF}

The present invention relates to a pipe freezing device and a freezing method of the present invention, and more particularly, in the case of maintenance of a system facility including a power plant and the like, when the drainage and isolation of the system water filled in the pipe is impossible, the both ends of the pipe flow safely and conveniently. The present invention relates to a pipe freezing device and a freezing method thereof that can freeze the system water to facilitate maintenance.

As is well known, piping is connected to the system equipment including the power plant and the like to guide the flow of the system water.

And in order to maintain the system equipment, it is necessary to freeze the front and rear ends of the pipe, this operation is performed when the drainage of the system water filled in the pipe is impossible or impossible to isolate.

As described above, in the prior art of freezing both ends of the pipe, a temporary jacket manufactured at the site is installed at both ends of the pipe, and the operator carries a kettle filled with liquid nitrogen to pour it onto the jacket to freeze both ends of the pipe. Let's go.

However, this conventional freezing technique has the following problems.

First, the conventional icing technology is difficult to install a jacket on both ends of the pipe, because the work space is not secured when the pipe connected to the grid equipment is located in the high place or the surrounding space is not secured, the work according to the installation There was a problem that it takes longer time.

Secondly, the conventional icing technology temporarily fabricates the jacket in the field, so that the jacket is rough and the accuracy of the dimension is significantly reduced, which increases the leakage of liquefied nitrogen injected into the jacket and increases the consumption by vaporization. There was a problem that the time is longer and the efficiency is lowered.

Third, the conventional icing technology is not only inconvenient for the installation work of the jacket due to the narrow working space when there is a device or equipment where the position of the pipe connected to the grid equipment is located close to the ceiling of the structure or interfere with the surrounding area, There was a problem that can not be injected into the liquid nitrogen contained in the jacket.

Fourth, the conventional icing technology must maintain the freezing state if the maintenance time of the system equipment is long, the conventional icing technology is to separate the worker to carry the liquid nitrogen in the kettle to the jacket while transporting one by one, separate workers As needed, there was a problem that led to a decrease in work efficiency along with labor cost burden.

The present invention has been made to solve the conventional problems as described above, the object of the present invention is to simply and conveniently install the jacket at both ends of the pipe located in a narrow space or a space that is not sufficiently secured, The present invention relates to a pipe freezing device and a freezing method thereof, which can prevent the leakage of liquid nitrogen injected into a jacket in advance, thereby shortening freezing time and economically reducing costs.

Another object of the present invention relates to a pipe freezing device that can reduce the labor cost according to the needs of the operator by automatically injecting liquid nitrogen into the jacket and a freezing method thereof.

In order to achieve the above object, the pipe freezing device of the present invention, in the freezing device for freezing the front end and the rear end of the pipe connected to the system equipment, the refrigerant is injected to freeze the system water flowing through the front end and the rear end of the pipe. Wrapping tubes are provided with a plurality of injection nozzles, each wrapped around both ends of the pipe; Holders removably coupled to both front and rear ends of the pipe so as to fix both ends of each wrapping tube to the pipe; A cooling jacket covering the wrapping tube fixed by the holder to be cooled; A supply pipe connected to both of the wrapping tubes to supply a refrigerant; A storage tank connected to the supply pipe to store a refrigerant; And a stop valve installed to control the flow of the refrigerant stored in the storage tank.

The pipe freezing device of the present invention preferably further includes a diffusion sheet wound on the front and rear ends of the pipe so as to absorb the refrigerant injected from the injection nozzle of the wrapping tube and to diffuse it evenly to the surface of the pipe.

Here, the one of the holder, the supply hole may be perforated so that one end of the supply pipe and the wrapping tube is connected.

The holder may include a first holder formed to surround one side of the outer diameter of the pipe, a second holder rotatably connected to the first holder by a hinge, and formed to surround the other side of the outer diameter of the pipe, the first holder and the second holder. A clamp connected to the pipe so as to be removably coupled to the pipe. In this case, a fixing ring groove may be formed inside the first holder and the second holder to fix the outer diameter of the wrapping tube.

In addition, it is preferable that both ends of the cold insulation jacket have a Velcro tape attached thereto to cover the wrapping tube detachably.

In addition, the pipe freezing device of the present invention may further include a control valve installed to adjust the flow rate of the refrigerant supplied to the wrapping tube.

On the other hand, in order to achieve the above object, the pipe freezing method of the present invention, in the pipe freezing method for freezing the front end and the rear end of the pipe connected to the system equipment, the refrigerant to freeze the system water flowing through the front end and the rear end of the pipe. A wrapping step of wrapping the wrapping tubes provided with a plurality of spray nozzles for spraying around both ends of the pipe; A fixing step of coupling the holder to both front and rear ends of the pipe to fix both ends of the wrapping tube; A coating step of covering the cold jacket on the wrapping tube; And a freezing step of supplying the refrigerant stored in the storage tank through supply pipes connected to the two lapping tubes to freeze the system water flowing through the front and rear ends of the pipe.

Here, before the lapping step, it is preferable to further include a sheet mounting step of winding the diffusion sheet in each of the front end and the rear end of the pipe to absorb the refrigerant injected from the injection nozzle of the wrapping tube to diffuse evenly to the surface of the pipe. .

According to the present invention implemented by the above means, at both ends of the pipe located in a narrow space or a space where the working space is not sufficiently secured, after wrapping the wrapping tube, joining the holder and covering the cold jacket, the wrapping tube Through the process of automatically supplying the coolant, there is a very useful effect that can freeze the pipe simply and easily.

In particular, in the present invention, since the refrigerant injected from the injection nozzle of the wrapping tube diffuses through the diffusion sheet and diffuses evenly to the surface of the pipe, the freezing time is shortened and the leakage of the refrigerant is prevented in advance, thereby reducing the freezing time and cost effectively. The savings can be expected.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail.

As shown in FIG. 1, the pipe icing apparatus of the present invention includes a diffusion sheet 20 wound around the front end 12 and the rear end 14 of the pipe 10 connected to the system, respectively, the pipe ( 10 are provided with a plurality of injection nozzles 32 for injecting refrigerant into the diffusion sheet 20 to freeze the system water flowing through the front end portion 12 and the rear end portion 14 of the diffusion sheet 20. Each of the wrapping tubes 30, which are respectively wrapped, and both ends of each of the wrapping tubes 30 are detachably coupled to the outer diameter sides of the front end portion 12 and the rear end portion 14 of the pipe 10 so as to secure the pipe 10 to both ends thereof. Holder 40, a cold insulation jacket 50 for covering the lapping tube 30 fixed by the holder 40 to cool, a supply pipe 60 connected to both lapping tubes 30 to supply a refrigerant, A storage tank 70 connected to the supply pipe 60 to store the refrigerant, and a stop valve installed to control the flow of the refrigerant stored in the storage tank 70. What constitutes 80 is considered to be a technical idea.

The piping icing apparatus of the present invention freezes the system water flowing through the front end portion 12 and the rear end portion 14 of the pipe 10 connected to the system equipment to enable maintenance of the system equipment.

Diffusion sheet 20 is made of a fiber material that absorbs the refrigerant well, is wound along the circumference of the front end portion 12 and the rear end portion 14 of the pipe 10 to be frozen. The diffusion sheet 20 absorbs the refrigerant injected from the injection nozzle 32 and evenly diffuses the surface of the pipe 10 to freeze the front end 12 and the rear end 14 of the pipe 10 within a short time. In addition, the refrigerant is prevented from flowing to the outside in advance.

The wrapping tube 30 is made of a flexible material and is wrapped along the outer circumference of the diffusion sheet 20. Each of the wrapping tubes 30 is provided with a plurality of injection nozzles 32 at regular intervals, preferably at 40 mm equal intervals, to inject the refrigerant introduced into the wrapping tube 30 toward the pipe 10. It is preferable that the diameter of the injection nozzle 32 is 1 mm, but it is clear that the diameter of the injection nozzle 32 may be changed as necessary. In addition, one end of the wrapping tube 30 is blocked by a plug or cap.

The holder 40 is to firmly fix both ends of each wrapping tube 30, such a holder 40 is hinged to the first holder 41 and the first holder 41 surrounding one side of the outer diameter of the pipe (10) A second holder 42 rotatably connected to a 43 to surround the other side of the outer diameter of the pipe 10, and a clamp 44 to detachably couple the first holder 41 and the second holder 42. It is composed.

As illustrated in FIGS. 2A and 2B, the first holder 41 and the second holder 42 are formed in a semi-circular ring shape having a substantially rectangular cross section, and are arranged symmetrically with one end thereof. Is connected to and becomes rotatable. The other ends of the first holder 41 and the second holder 42 are disassembled or coupled by the clamp 44. The clamp 44 is enlarged in the upper portion of FIG. A female clamp 44a provided on the outer side of the other end of 41 and a male clamp 44b provided on the second holder 42 to be coupled to the female clamp 44a. The u-bolt 44c (formed as a 'U' shape on a plane) provided in the male clamp 44b and coupled to the female clamp 44a is screwed into the nut 44d so that the length can be adjusted. If the outer diameter of the) is different, lengthening or reducing the length thereof is adjusted to match the outer diameter of the pipe (10) is coupled to the outer diameter of the pipe (10).

In addition, fixing ring grooves 41a and 42a are formed in the first holder 41 and the second holder 42 to surround and fix the outer diameter of the wrapping tube 30. The fixed ring grooves 41a and 42a are formed to have a diameter larger than the inner diameters of the first holder 41 and the second holder 42 surrounding the outer diameter of the pipe 10.

In addition, as shown in FIG. 3, the holder 40, that is, the holder 40 to which the supply pipe 60 is connected, is drilled with a supply hole 42b so that one end of the supply pipe 10 and the wrapping tube 30 are connected to each other. do. Accordingly, the refrigerant supplied through the supply pipe 60 is moved to the wrapping tube 30 through the supply hole 42b of the holder 40.

The cold jacket 50 is to wrap and wrap the outer surface of the wrapping tube 30, the cold jacket 50 is made of a rastan (lastan) material plasticized and carbonized acrylic fibers to block the heat source of the outside air to maintain the freezing state And further, it is possible to prevent the thawing of the pipe 10 frozen in a short time in advance. Velcro tape (not shown) is attached to both ends of the cold jacket 50 to detachably cover the outside of the wrapping tube 30.

Supply pipe 60 is to supply the refrigerant to both of the wrapping tube 30, this supply pipe 60, as shown in Figure 1, one end is connected to the storage tank 70 and the other end branched to both sides pipe The refrigerant is supplied to the wrapping tube 30 wrapped at the front end 12 and the rear end 14 of the 10, respectively.

In addition, a stop valve 80 is installed at one side of the supply pipe 60 adjacent to the storage tank 70 to control the flow of the refrigerant stored in the storage tank 70, and a flow control valve 90 is installed at the other side of the supply pipe 60. The flow rate of the refrigerant flowing through the 60 is adjusted.

The storage tank 70 stores the coolant, and discharges the stored coolant to the supply pipe 60 by the internal pressure. The discharge of the coolant is interrupted by a stop valve 80 installed in the supply pipe 60. And the refrigerant is preferably implemented by liquefied nitrogen, the system water filled in the pipe 10 by the evaporation heat of the liquefied nitrogen is frozen.

The overall installation process and operation relationship of the present invention configured as described above will be described in detail with reference to FIGS. 4A to 4F.

First, as shown in FIG. 4A, the holder 40 connected to the wrapping tube 30 is coupled to the outer diameters of the front end portion 12 and the rear end portion 14 of the pipe 10 to be frozen. Likewise, the diffusion mat 20 is wound along the circumference of the pipe 10.

Subsequently, the wrapping tube 30 is wrapped so that the injection nozzle 32 faces the diffusion sheet 20 as shown in FIG. 4C, and the end of the wrapping tube 30 uses the remaining holder 40 as shown in FIG. 4D. To be fixed to the pipe (10).

Next, as shown in FIG. 4E, the insulation jacket 50 is coated on the wrapping tube 30, and as shown in FIG. 4F, the supply pipe 60 is connected to the supply hole 42b of the holder 40.

According to the present invention provided as described above, when the stop valve 80 is opened, the refrigerant stored in the storage tank 70 is discharged into the supply pipe 60 by the internal pressure, and the refrigerant introduced into the supply pipe 60 is formed on both sides of the wrapping tube. 30, wherein the flow rate of the refrigerant is appropriately adjusted according to the control state of the flow control valve 90.

The refrigerant introduced into the wrapping tube 30 is injected into the diffusion sheet 20 through the injection nozzle 32, and the diffusion sheet 20 absorbing the injected refrigerant evenly distributes the refrigerant on the surface of the pipe 10. By diffusing, the system water flowing inside the pipe 10 is frozen by the heat of evaporation of the refrigerant.

On the other hand, the pipe freezing method according to the present invention, the wrapping step of wrapping each of the wrapping tube 30 with a plurality of injection nozzles 32 for injecting the refrigerant into the pipe 10 around both ends of the pipe 10 ( S20); Fixing step (S30) for coupling the holder 40 to both the outer diameter of the front end and the rear end of the pipe 10 to fix both ends of the wrapping tube 30; A coating step (S40) of coating the cold jacket 50 on the wrapping tube 30; Freezing step of supplying the refrigerant stored in the storage tank 70 through the supply pipe 60 connected to both the wrapping tube 30 to freeze the flow of water flowing through the front end portion 12 and the rear end portion 14 of the pipe 10 ( S50);

Here, the pipe freezing method according to the present invention, before the lapping step (S20), to absorb the refrigerant injected from the injection nozzle 32 of the wrapping tube 30 to distribute the pipe evenly to the surface of the pipe (10) It is preferable to further include a sheet mounting step (S10) of winding the diffusion sheet 20 to the front end portion 12 and the rear end portion 14 of 10), respectively.

Therefore, in the present invention, even if the piping 10 to be frozen is located in the height area or the surrounding space is not enough, the work space is not sufficient, the diffusion sheet 20, the wrapping tube 30, the holder 40 in the pipe 10 ), And after the cold jacket 50 is simply installed, the refrigerant stored in the storage tank 70 is supplied to the wrapping tube 30 through the supply pipe 60 by the stop valve 80. It is expected to be simple and short work time.

In particular, according to the present invention, as the refrigerant stored in the storage tank 70 is directly injected into the pipe 10 through the supply pipe 60 and the wrapping tube 30, the leakage of the refrigerant lost outside is prevented in advance and freezing time. Will shorten.

In addition, the present invention, even if the maintenance time of the system equipment is long, as the refrigerant can be supplied to the wrapping tube 30 by a simple operation of the stop valve (80), to maintain the freezing state of the pipe (10) continuously It becomes possible.

1 is a schematic diagram showing the overall configuration and the flow of the refrigerant according to the present invention.

2a and 2b is a front view and an operation of the holder according to the present invention.

Figure 3 is an enlarged view showing an enlarged main portion according to the present invention.

Figures 4a to 4f is an exemplary view showing step by step installation procedure according to the present invention.

Figure 5 is a block diagram showing the steps of the pipe freezing method according to the present invention.

♠ Explanation of symbols on the main parts of the drawing ♠

10: pipe 20: diffusion sheet

30: wrapping tube 40: holder

50: cold jacket 60: supply pipe

70: storage tank 80: stop valve

Claims (9)

In the freezing device for freezing the front end and the rear end of the pipe connected to the grid facility, Wrapping tubes are provided with a plurality of injection nozzles for injecting a refrigerant to freeze the flow of water flowing through the front end and the rear end of the pipe, each wrapped around both ends of the pipe; Holders removably coupled to both front and rear ends of the pipe so as to fix both ends of each wrapping tube to the pipe; A cooling jacket covering the wrapping tube fixed by the holder to be cooled; A supply pipe connected to both of the wrapping tubes to supply a refrigerant; A storage tank connected to the supply pipe to store a refrigerant; A stop valve installed to control the flow of the refrigerant stored in the storage tank; Piping freezing device, characterized in that consisting of. The method according to claim 1, And a diffusion sheet wound around the front and rear ends of the pipe so as to absorb the refrigerant injected from the injection nozzle of the lapping tube and evenly spread it to the surface of the pipe. The method according to claim 1, The pipe icing device, characterized in that the supply hole is perforated so that one end of the supply pipe and the wrapping tube is connected to the holder. The method according to claim 1 or 3, The holder, A first holder formed to surround one side of the outer diameter of the pipe, a second holder rotatably connected to the first holder is hinged to the other side of the outer diameter of the pipe, the first holder and the second holder can be disassembled in the pipe Pipe icing device, characterized in that consisting of a clamp connected to be coupled. The method according to claim 4, The inside of the first holder and the second holder pipe icing device, characterized in that the fixing ring groove is formed to be fixed while wrapping the outer diameter of the wrapping tube. The method according to claim 1, Velocity tape is attached to both ends of the cold jacket, the pipe icing device, characterized in that for covering the wrapping tube detachably. The method according to claim 1, And a flow control valve installed to adjust the flow rate of the refrigerant supplied to the wrapping tube. In the pipe freezing method for freezing the front end and the rear end of the pipe connected to the grid facility, A wrapping step of wrapping a wrapping tube having a plurality of injection nozzles for injecting a refrigerant to freeze the system water flowing through the front and rear ends of the pipe, around both ends of the pipe; A fixing step of coupling the holders to both front and rear ends of the pipe so as to fix both ends of the wrapping tube; A coating step of covering the cold jacket on the wrapping tube; Freezing step of supplying the refrigerant stored in the storage tank through the supply pipe connected to the both sides of the wrapping tube, to freeze the flow of water flowing through the front and rear ends of the pipe; Piping freezing method comprising a. The method according to claim 8, Before the lapping step, the pipe further comprising a sheet mounting step of winding the diffusion sheet in each of the front end and the rear end of the pipe to absorb the refrigerant injected from the injection nozzle of the wrapping tube to diffuse evenly to the surface of the pipe Freezing method.

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