JP3354071B2 - Method of inserting instruments into water flow pipe and method of stopping water flow in water flow pipe - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The device of the present invention is water flow in the pipe
Regarding the method of insertion and the method of stopping water in the water pipe, particularly, installing a measuring instrument or a freezing instrument for implementing an ice plug without stopping the water flow operation inside the pipe in the water flow state. The present invention relates to an instrument insertion method and a water stopping method for a water flow pipe.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 13, for example, when repairing or replacing a hot / cold water pipe used for an air conditioner, a crack or the like is generated on the way from the tank 1 to the pipe 2 connected. At the repair / replacement location 3a, the valve 4 interposed between the paths leading to the location 3a is closed to shut off the flow of the liquid from the tank 1, and then the repair / replacement work is performed.

[0003] However, at the repair / replacement location 3b where no valve is disposed around the periphery, the water of the tank 1 and the pipe 2 is drained, and then the repair / replacement work of the pipe is performed. For this reason, if the water filling after the operation is also taken into consideration, the time and cost are increased. Therefore, when repairing or replacing parts like 3b,
A freezing method has been considered in which a part of a flow pipe to the repair / replacement point 3b is formed with a water plug 5 by an ice plug (Japanese Patent Application Laid-Open Nos. 51-102220 and 63-26).
No. 491).

As shown in FIG. 14, a jacket 7 for holding a cooling medium 6 such as liquid nitrogen is formed on the outer surface of the pipe 2 around the pipe, as shown in FIG. An ice plug (ice plug) 9 is formed to temporarily stop the flow of the liquid inside the pipe.

[0005]

However, in order to stop the liquid inside the pipe using the above-described conventional ice plug, it is necessary to completely freeze the liquid at the center of the pipe. The time required for complete freezing increases with the increase in Also, in the case of large-diameter piping, the temperature is balanced with an ice layer of a certain thickness formed on the inner surface of the piping, and it does not freeze completely to the center of the piping, so there is a technical problem that ice plugs cannot be applied to large-diameter piping. was there.

When an ice plug can be applied to such a large-diameter pipe, a rod or one end is closed inside the pipe in order to promote freezing of the pipe and to surely form ice inside the pipe in a short time. It was found that a hollow tube-shaped freezing promoting device should be placed in the pipe, but the work of attaching the freezing promoting device while maintaining the water flow in the pipe and preventing water leakage was It was difficult. Such a situation is the same when a flow rate measuring instrument, a pressure measuring instrument, or the like is installed in the water flow pipe. It was desired to be able to be easily attached while aiming.

SUMMARY OF THE INVENTION An object of the present invention is to firstly focus on the above-mentioned conventional problems, and to easily insert a pipe insertion instrument into a pipe in which water is flowing while preventing leakage. It is an object of the present invention to provide a method for inserting an instrument into a water flow pipe . Secondly, it is another object of the present invention to provide a water stopping method using a pipe insertion device as a heat transfer member so that water can be stopped by an ice plug regardless of the diameter of a water passage pipe.

[0008]

[0009]

[MEANS FOR SOLVING THE PROBLEMS] To achieve the above object
The method for inserting an instrument into a water flow pipe according to the present invention is characterized in that a small socket formed with a fitting screw of an instrument to be inserted into the water flow pipe is fixed to the outer peripheral surface of the water pipe, After fixing the insertion guide using the screws described above, a water faucet is attached by being guided by the insertion guide, and a large socket screwed to the insertion end portion of the water faucet is attached to the outer periphery of the small socket. After abutting on the pipe, it is fixed, and after forming a through hole in the pipe through the inside of the small socket by the drilling machine through the water faucet, an insertion tool in the pipe is inserted into the through hole and fixed to the small socket. It is characterized by having made it. In this case, when the large socket is fixed to the pipe, a wedge is attached to the insertion guide and inserted into the guide insertion opening of the water faucet, thereby centering the water faucet with respect to the insertion guide. The socket may be arranged concentrically with the small socket and fixed to the outer peripheral surface of the pipe.

Further, the method for stopping water in a water pipe according to the present invention comprises a small socket fixed to the outer peripheral surface of the water pipe and a large socket for fixing a water faucet fixed concentrically and fixed to the outer periphery of the small socket. In the state where a water faucet was attached to the large socket and water was stopped, a perforator was attached to the water faucet to form a through hole in the pipe through the small socket part, and then a pipe with a closed end was inserted inside the pipe. After screwing and fixing to the small socket and removing the water faucet, a refrigerant jacket is attached to the outer periphery of the pipe including the large socket, and a cooling medium is supplied into the refrigerant jacket and the pipe to supply the pipe surface and the insertion pipe. It is characterized in that the fluid inside the pipe is frozen from the surface to stop the water in the pipe.

[0011]

According to the above construction, a double socket is provided on the outer peripheral surface of the water pipe, and a water tap is attached to the outer large socket.
The pipe insertion device can be securely attached to the inner small socket or the fastening portion directly formed in the pipe while using the water tap to prevent water leakage from the water pipe. The pipe insertion device is formed by a refrigerant conduit, and a jacket surrounding the outer circumference of the double socket is attached to the outer circumference of the pipe, so that the cold heat source of the refrigerant installed on the pipe surface can be extended to the center of the pipe freezing position.
In order to transfer heat efficiently, an ice plug can be formed inside the pipe in a water-flowing state, and the repair and replacement work of the pipe can be reliably performed in a short time.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1A is a cross-sectional view of a main part showing a state where a pipe is being drilled using the apparatus for inserting an instrument into a water flow pipe according to the present invention, and FIG. FIG. 4 is a cross-sectional view of a state in which an ice plug is formed in a pipe to perform water stoppage of the pipe by using the tool to be used as a freezing promoting device.

As shown in FIG. 1, the device insertion device includes a small socket 12 fixed to an outer peripheral surface of a pipe 10 in a water-passing state, and a concentrically fixedly arranged outer peripheral portion of the small socket 12. And a large socket 14. The small socket 12 has a female screw formed on the inner peripheral surface thereof, and is provided with a freezing promoting tube 16 (FIG.
(Refer to (2)). In addition, large socket 1
Reference numeral 4 denotes a cylindrical body having a female screw for fixing a water faucet 18 formed on an inner peripheral surface thereof. The cylindrical body is formed by piercing the pipe 10 along the center of the small socket 12 in order to mount the freeze accelerating pipe 16 on the pipe 10. The water faucet 18 is used to prevent water leakage from the pipe 10 when the freeze accelerating pipe 16 is attached to the small socket 12.

The water tap 18 forms a cross passage inside,
The ball valve body 20 is built in the passage intersection. A vertical passage along the radial direction of the pipe 10 is used as a working passage for a mounting means for the drilling machine and the freeze accelerating pipe 16, and a rotation operation shaft 22 of the ball valve body 20 is attached to one end of the horizontal passage. The other end is plugged with a cap 24. FIG. 1A shows a state in which a hole is drilled in the pipe 10. The lower base 26 of the vertical passage of the water tap 18 is screwed and fixed to the large socket 14, and the upper base 28 is bored. Through the mounting flange 32 of the machine 30, the water is stopped by the packing 34 provided in the flange 32, and the pipe 10 is connected to the pipe 10 at the position of the center of the small socket 12 by using the drill 36 introduced into the vertical passage. The instrument insertion hole is opened.
After the piercing operation is completed, the piercing drill 36 is pulled out, the passage is temporarily blocked by the ball valve body 20, and then a jig (not shown) in which the freezing promoting tube 16 is attached to the tip instead of the piercing machine 30. Similarly, the freezing promoting tube 16 is inserted through the mounting flange 32 and screwed to the small socket 12 to insert the freezing promoting tube 16 inside the pipe 10.

After the freezing promoting tube 16 is inserted into the pipe 10 in a water-permeable state in this way, the freezing promoting tube 1
When an ice plug is formed in the pipe 10 by using 6, a freezing device is configured as shown in FIG. That is, the jacket 38 is attached to the surface of the pipe 10 so as to incorporate the double sockets 12 and 14. A coolant 40 such as liquid nitrogen is held inside the jacket 38, and an ice plug 42 is formed inside the pipe.
At this time, the cooling heat of the refrigerant in the jacket 38 is efficiently transmitted to the center of the freezing position in the pipe via the freezing promotion pipe 16.

FIG. 2 shows a water faucet on the outer periphery of the small socket 12 when a double socket for inserting and removing the freezing accelerating pipe 16 into and from the water pipe 10 when implementing the ice plug. 18 large fixing sockets 1
4 shows a method of concentrically centering No. 4. First, as shown in FIG. 1A, the small socket 12 is weld-stopped at the corresponding position of the pipe 10 to be frozen. And the same figure (2)
As shown in FIG.
Is to be attached. This insertion guide 44
One end of the screw portion 44A that matches the screw diameter of the small socket 12 at one end
The other end is formed of a columnar body provided with a square portion 44B so as to be rotatable with a spanner or the like. The outer diameter of the lower half of the cylindrical body 44C of the insertion guide 44 inserted into the faucet 18 is equal to or smaller than the inner diameter of the vertical passage of the faucet 18. The upper half is formed with a smaller diameter than this, and a thread is cut here to mount a centering cone 46 as a wedge body. The centering cone 46 is inserted into the upper base of the water faucet 18, and the insertion guide 44 and the small socket 12
Can be adjusted so that the large socket 14 is properly concentrically arranged. From this state,
Insert the faucet 18 into which the large socket 14 is screwed, and insert it into the guide 4.
After passing through 4, the outer periphery of the large socket 14 is welded to the pipe 10. Thereby, the small socket 12 and the water faucet 1
The center of the hole of No. 5 is the same, and a double socket in which the centering is accurately realized is formed.

FIG. 3 to FIG.
2 shows a series of specific processing steps for inserting and removing inside a 0.

FIG. 3 shows a process for constructing a water pipe insertion device comprising a double socket. At a location where the fluid flowing through the pipe 10 is to be frozen to form an ice plug, the small socket 12 is fixed to the location of the pipe 10 by welding (FIG. 1A). Using the female screw of the small socket 12, the insertion guide 44 is screwed and fixed (FIG. 2B). Then, the insertion guide 44
The water faucet 18 is mounted on the water pipe 18 so that the guide 44 penetrates the vertical passage of the water faucet 18. The large socket 14 is screwed onto the lower base 22 of the water tap 18,
By mounting the water tap 18 on the insertion guide 44, the large socket 14 is centered with respect to the small socket 12 (FIG. 3 (3)). In this case, as shown in FIG. 2C, centering can be accurately performed using the centering cone 46. In this state, the large socket 14 and the pipe 10 are welded, and the large socket 14 is connected to the pipe 10.
It sticks to. Then, by removing the insertion guide 44 from the small socket 12, a double socket having a concentric arrangement is formed, and the operation of preparing to attach the instrument to the pipe 10 is completed (FIG. 4D).

Next, as shown in FIG. 4, a drilling operation is performed on the pipe 10 at the center of the small socket 12. First, the attachment flange 32A is screwed into the upper base 26 of the water faucet 18, and then the flange 32B to which the drill 36 is attached is bolted. Flange 32B with drill 36 attached
Is provided with a water stop packing 34, and a drill 36
Water does not leak during rotation or movement of the. Water tap 1
The sealing cap 24 is screwed into the opening 8 (FIG. 1A). Then, the drill 36 is pushed in to make a through hole in the pipe 10. At this time, water comes out from the inside of the pipe 10, but does not accumulate inside the water faucet 18 and the flange portion 32 </ b> A, and does not leak to the outside by the water stopping packing 34 attached to the flange portion 32 </ b> B (see FIG. (FIG. 2).
After the penetration process is completed, the drill 36 is pulled back, and the water tap ball valve body 20 is rotated by the valve rotation operation shaft 22 attached to the water tap 18 to stop the water (FIG. 3 (3)). Thereafter, the flange 32B to which the drill 36 is attached is removed, and the flange 32A is further removed.

Thereafter, as shown in FIG. 5, a flange 32C for the freeze accelerating tube 16 is screwed into the water faucet 18. Flange 32D with freeze promotion tube 16 attached
Bolt. An insertion rod 54 having a socket wrench 50 at one end and a handle 52 at the other end is attached to the flange 32D. Water does not leak even when the insertion rod 54 is rotated or moved by the waterproof packing 34. (FIG. (1)).

The outer diameter of the freezing promoting tube 16 is smaller than the hole made by the drill 36. It also has a threaded portion that matches the small socket 12. Further, the end portion has a square shape so as to fit into the socket wrench portion 50.

The faucet ball valve body 20 is rotated by a valve rotation operation shaft 22 attached to the faucet 18, and the faucet 18 is rotated.
Open. The freeze-promoting tube 16 is screwed into the small socket 12 while the insertion rod 54 is pushed in and rotated by the handle 52 (FIG. 2B). When the screwing is completed, the insertion rod 54 is pulled back, and the socket wrench 50 is removed from the freeze accelerating tube 16. Thereafter, the water faucet ball valve body 20 is rotated by the valve rotation operation shaft 22 attached to the water faucet 18 to stop water ((3) in the same figure).

After the freezing accelerating pipe 16 is mounted inside the water pipe 10 in this manner, the ice plug is implemented.
This is, as shown in FIG.
2D, the water faucet 18 is removed (FIG. 1A). And
A jacket 38 is attached to the pipe 10,
Is filled with a refrigerant 40, and an ice plug 42 is
Is formed to stop the water inside the pipe 10 (FIG. 2B).
Such an ice plug 42 may be implemented before and after a place where repair or the like is required, and the work may be performed.

After the construction at the predetermined portion and the thawing of the ice plug 42 have been completed, the dismantling process is performed. As shown in FIG. 7, the dismantling process is performed by the water tap 18, the flange 32C, and the flange 32D.
Is attached to the large socket 14. The water tap ball valve body 20 is rotated and opened by the valve rotation operation shaft 22 attached to the water tap 18. The insertion rod 54 is pushed in, and the socket wrench 50 is attached to the freezing promoting tube 16. Handle 5
The freeze accelerating tube 16 is removed from the small socket 12 while rotating by (2) (FIG. 1 (1)). Then, after pulling back the insertion rod 54 and extracting the freezing promoting tube 16, the water faucet 18
Then, the water tap ball valve body 20 is rotated by the valve rotation operation shaft 22 attached thereto to stop water ((2) in the same figure).

After that, as shown in FIG. 8, the flange 32D is removed, and the freeze accelerating tube 16 is removed from the socket wrench 50. Further, a plug 56 having a screw corresponding to the small socket 12 is attached to the socket wrench part 50. The flange portion 32D is bolted to the flange portion 32C (FIG. 1A). A water tap ball valve body 20 is operated by a valve rotation operation shaft 22 attached to the water tap 18.
Rotate to open. The insertion rod 54 is pushed in, and the plug 56 is inserted into the small socket 12 while being rotated by the handle 52.
Screw. Thus, the water inside the pipe 10 does not leak to the outside ((2) in the same figure). Then, the insertion rod 54 is pulled back, and the socket wrench 50 is
Remove from Thereafter, the water tap ball valve body 20 is rotated by the valve rotation operation shaft 22 attached to the water tap 18 to stop water. Flange 32C, flange 32D, water faucet 1
Remove 8 Then, the welded portion of the outer periphery of the large socket 14 is scraped off, the large socket 14 is removed from the pipe 10, and the operation is completed (FIG. 3C).

FIGS. 9 to 11 show modifications of the apparatus for inserting an instrument into a water pipe. That is, in the above-described embodiment, the double socket structure including the small socket 12 and the large socket 14 has been described as a method of forming the screw portion to which the freeze accelerating tube 16 is attached. However, as long as the fastening part of the freeze accelerating pipe 16 can be formed in the pipe 10, the following method may be adopted.

FIG. 9 shows a method in which a thread portion is formed directly on the pipe 10 without using the small socket 12. This may be performed in the following steps. First, a water tap 18 is connected to the pipe 10.
A socket (or saddle) 58 corresponding to the male screw portion of the lower base 26 is welded (FIG. 9A). Then, the pipe 10 is pierced in the same step as the first embodiment (the step in FIG. 4) (FIG. 2B). Then, a screw portion 62 is formed in the hole 60 thus drilled (FIG. 3C). This screw portion may be formed by attaching a tap in place of the drill 36.

FIG. 10 uses a bottomed socket (or saddle) 64 whose inside is sealed from the other end or the other end of the screw portion to which the water faucet 18 is attached. In this method, a screw portion 62 is formed on both. First, a socket (or saddle) 64 that matches the male thread portion of the lower cap 26 of the water tap 18 and is sealed at the other end or the inside from the other end is welded to the pipe 10 (FIG. 1). (1)). Next, the pipe 10 is pierced in the same step as in the first embodiment (the step in FIG. 4) (FIG. 2B). Then, a screw portion 68 is formed at the hole 66 thus drilled (FIG. 3 (3)).

Further, FIG. 11 uses a socket (or saddle) 70 with a bottom having a screw portion for mounting the water faucet 18. The screw of the freezing accelerating tube 16 is previously set to the concentric position at the bottom. This is a method of forming a socket (or saddle) structure in which a screw part 72 corresponding to the part is formed. That is, a socket (or saddle) having a threaded portion 72 that matches the threaded portion of the freezing promoting tube 16 so that the threaded portion is coaxial with the female screw formed on the inner peripheral surface of the cylinder in advance for screwing the water faucet 18. 70 is welded (FIG. 1 (1)). Next, steps similar to those in the first embodiment (steps in FIG. 4)
To pierce the pipe 10 (FIG. 2B). Perforated hole 74
, The freezing promoting tube 16 may be screwed into the threaded portion 72 of the socket (or saddle) 70 (FIG. 3 (3)).

FIG. 12 shows a modification of the penetration-type freezing promoting device. This is because, by using an umbrella-shaped penetration-type freezing promoting device 76 with an umbrella-shaped freezing promoting device inserted into the pipe 10, it can be inserted from a small hole in a folded state. In this state, the cooling surface area can be increased, and the freezing time can be further reduced.

According to the above-described embodiment, the freezing promoting tube 1
6 and the umbrella-shaped freezing promoting device 76 can be arranged to the center of the freezing position in the pipe 10 without stopping the water flow operation of the pipe 10, thereby efficiently cooling regardless of the diameter of the pipe 10. Since the ice plug 42 can be reliably formed, the repair and replacement of the pipe can be performed in a short time and reliably. In particular, large-diameter pipes that could not be completely frozen in the past have been repaired using ice plugs.
Replacement work was made possible. In the above embodiment, the pipe 1
Although the example in which the ice plug 42 is formed at 0 has been described, the present invention is also applicable to a case in which an instrument for measuring the temperature of the internal fluid or measuring the flow velocity is attached to the pipe 10 in a flowing state.

[0032]

As described above, according to the present invention,
Forming screws for fittings to be inserted inside the water pipe
This small socket is fixed to the outer peripheral surface of the water pipe.
After fixing the insertion guide using the screw of the bracket,
Guide the insertion guide and attach a water faucet.
Insert the large socket screwed into the insertion end of the stopper into the small socket
After contacting the pipe at the outer periphery of the
Drilling machine to make through hole in piping through small socket
After forming, insert the pipe insertion tool into the through hole
Since it is configured to be fixed to the socket, the pipe drilling operation using the faucet passage can be accurately adjusted to the drilling position without hindering the water flow operation of the piping and the center of the faucet passage. Therefore, the pipe insertion device can be easily inserted, and the effect of mounting the pipe insertion device on the water pipe in a short time can be obtained.

In addition, a small socket fixed to the outer peripheral surface of the water flow pipe and a large socket for fixing a water tap which is concentrically arranged and fixed to the outer circumference were used, and a water tap was attached to the large socket to stop water. After attaching a drilling machine to the water faucet in this state and forming a through hole in the pipe through the small socket, a pipe with a closed end is inserted into the pipe and screwed and fixed to the small socket. After removal, a refrigerant jacket is attached to the outer periphery of the pipe including the large socket, a cooling medium is supplied to the inside of the refrigerant jacket and the pipe to freeze the pipe internal fluid from the pipe surface and the inserted pipe surface, and to stop the water stop of the pipe. Since it is configured to perform the operation, there is an effect that the water stop of the water supply pipe by the ice plug can be easily and easily realized.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a main part of an apparatus for inserting an instrument into a water pipe according to an embodiment, and a cross-sectional view illustrating a state in which an ice plug is formed.

FIG. 2 is an explanatory view of a step of forming an apparatus for inserting an instrument into a water pipe according to the embodiment.

FIG. 3 is a process diagram for attaching a small socket and a large socket to a pipe.

FIG. 4 is a process chart of a drilling operation on a pipe.

FIG. 5 is a view showing a process of attaching a freeze accelerating pipe to a pipe.

FIG. 6 is an explanatory diagram of a state of forming an ice plug.

FIG. 7 is a process diagram of removing the freeze accelerating tube.

FIG. 8 is a process diagram of attaching a plug to a pipe hole.

FIG. 9 is an explanatory view of a first modification of the device insertion device.

FIG. 10 is an explanatory view of a second modification of the device insertion device.

FIG. 11 is an explanatory view of a third modification of the device insertion device.

FIG. 12 is an explanatory view of a modification of the freeze accelerating device.

FIG. 13 is an explanatory diagram of a place where the freezing method is performed.

FIG. 14 is an explanatory sectional view and a perspective view of a conventional freezing method.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 water passage pipe 12 small socket 14 large socket 16 freezing promotion pipe 18 minute faucet 20 ball valve 22 rotation operation shaft 24 cap 26 lower base 28 upper base 30 drilling machine 32 mounting flange 34 packing 36 drilling hole 38 jacket 40 refrigerant 42 Ice plug 44 Insertion guide 46 Centering cone 50 Socket wrench 52 Handle 54 Insertion rod 56 Plug

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-8-75077 (JP, A) JP-A-56-150692 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F16L 55/00 F16L 41/04

Claims (3)

(57) [Claims] 1. A small socket formed with a fitting screw for an instrument to be inserted into a water flow pipe is fixed to an outer peripheral surface of the water flow pipe, and an insertion guide is fixed using the screw of the small socket. Thereafter, a water faucet is attached by being guided by the insertion guide, and a large socket screwed to the insertion end of the water faucet is fixed after being brought into contact with piping at an outer peripheral portion of the small socket, and After forming a through-hole in the pipe through the inside of the small socket by the drilling machine through the stopper, the insertion device in the pipe is inserted into the through-hole and fixed to the small socket, into the water-flowing pipe. Instrument insertion method. 2. When the large socket is fixed to the pipe, a wedge body is attached to the insertion guide and inserted into the guide insertion opening of the water faucet to center the water faucet with respect to the insertion guide. The method according to claim 1, wherein the large socket is arranged concentrically with the small socket and is fixed to an outer peripheral surface of the pipe. 3. A small socket fixed to the outer peripheral surface of the water flow pipe and a large socket for concentrically fixing and fixing a water faucet fixed to the outer periphery thereof, and a water faucet is attached to the large socket to stop water. After attaching a piercing machine to the water faucet in this state and forming a through hole in the pipe through the small socket, a heat conductor is inserted into the pipe and screwed and fixed to the small socket. After removal, a refrigerant jacket is attached to the outer periphery of the pipe including the large socket, a cooling medium is supplied to the inside of the refrigerant jacket and to the heat transfer body to freeze the pipe internal fluid from the pipe surface and the inserted pipe surface, and to stop the pipe from stopping. A method for stopping water from flowing water piping.