KR200275592Y1 - Plugging machine for pipe's fitting - Google Patents

Abstract

The present invention can be installed more quickly and simply when installing the plug to the fitting to block the leakage of gas after the branching of the pipe or after the repair of the pipe. The simple structure of the plugging machine for the pipe fitting with low manufacturing cost It is about.

Plugging machine 30 of the present invention is installed in the intermediate shut-off valve (3) as the housing 31, the through-hole is formed in the center of the upper wall (31a), as the central through-hole of the housing 31 as The guide hole is formed in the center and the installation shaft guide member 32 having a male threaded line formed on the upper outer surface thereof is inserted into the through hole of the installation shaft guide member 32 and is moved to the lower end of the plug 10. It is connected to the connection portion 14d of the expansion device 14 and is installed so as to be movable on the mounting shaft 33, the pressing jaw 33a is formed in the middle portion, the upper pressing jaw 33a of the mounting shaft 33 It is fixed to the plug fastening handle 34 and the upper end of the installation shaft 33 is composed of a hub (34a) is formed with a female thread line for screwing the male thread of the mounting shaft guide member 32 Extended plate fastening handle 35 for rotating the installation shaft (33) Include.

Description

PLUGGING MACHINE FOR PIPE'S FITTING}

The present invention relates to various pipe fittings, such as branch fitting of pipes connecting a main pipe through which gas flows, and a branch pipe installed to a place requiring the gas, and more specifically, branching of pipes or repairing pipes. Later, when installing the plug to the fitting (fitting) to block the leakage of the gas can be installed more quickly and simply, and its structure is simple, and relates to a plugging machine for pipe fitting inexpensive manufacturing cost.

Recently, most households use city gas, and most buildings and houses use city gas as a fuel for heating, so city gas factories supply city gas to all the cities or villages where people live. Gas pipes are laid out like spider webs.

The gas is connected to the main pipe connected to the city gas plant and the branch pipe installed to the place requiring the gas by using a branch fitting (branch tee) to use the gas at the place of use.

In order to supply gas from the main pipe to the building or house which is the final place of use, in general, the branch pipe connected from the main pipe to the building and the house is first disposed, and then the main pipe and the branch pipe are connected by using branch fitting as the final work. do.

The connection of the main pipe and the branch pipe using the branch fitting is performed according to the following procedure while the gas flows through the main pipe.

(1) The branch fitting and the main pipe are welded by bringing the lower part of the branch fitting into contact with the main pipe, and the horizontal branch of the branch fitting is welded to the branch pipe already embedded.

(2) After installing the intermediate shutoff valve on the upper part of the branch fitting, install the perforator on the upper part of the intermediate shutoff valve, open the intermediate shutoff valve, lower the top part of the perforator to the main pipe, and rotate the top part. Drill the pipe.

(3) Pull the top of the drilling machine and the cut off part of the main pipe into the drilling body, put the intermediate shutoff valve closed and remove the puncturer from the intermediate shutoff valve.

(4) Install plugging machine in the intermediate shutoff valve to install the plug in the branch fitting to prevent gas leakage, remove the intermediate shutoff valve and install the cover plate for safety.

In this way, the main pipe and the branch pipe are safely connected while the gas flows through the main pipe.

In addition, when the pipe is to be repaired to repair the gas flow to the pipe portion to be repaired, this procedure will be described with reference to Figs.

(1) Weld the lower part of the fitting (2) to the pipe (1) and install the intermediate shut-off valve (3) to the fitting (2).

(2) After the perforator is installed in the intermediate shut-off valve (3), the intermediate shut-off valve (3) is opened, the top of the perforator is lowered to the pipe (1), and the top is rotated to drill the pipe.

(3) Pull up the top part of the punching machine and the cut part of the pipe (1) into the drilling base body, put the intermediate shut-off valve (3) closed and remove the punching machine from the intermediate shut-off valve.

(4) Next, install a plugging machine in the intermediate shut-off valve and install a temporary plug through the hole of the perforated pipe to cut off the gas flow to the downstream part of the pipe (1), and in this state, the downstream part of the pipe (1). After repairing, remove the temporary plug.

(5) Insert the plug (4) into the plugging machine to install the plug (4) to the fitting (2) to prevent gas leakage, remove the intermediate shut-off valve (3), and cover the top of the fitting (2) for safety Install the plate (5).

The upstream of the blocked pipe portion thus prevents the leakage of gas after repairing and repairing the downstream portion while the gas is flowing.

An example of a plug installed in a fitting to prevent gas leakage after branching and plumbing repairs is disclosed in US Pat. No. 4,058,142.

As shown in Fig. 2, the conventional plug 4 has a cylindrical body 4b in which an annular groove 4a is formed, and an O-ring 4c fitted in the annular groove 4a of the cylindrical body 4b. Expanding device (4d) is inserted into the annular groove (2a) formed in the fitting (2), expansion device connected to the plugging machine to expand the expansion plate (4d) by the operation of the plugging machine to insert into the annular groove (2a) (4e) is included.

In the conventional plug as described above, the plug 4 is installed on the fitting 2, and thus the extension device 4e is left in the state of being coupled to the plug 4 as it is. The manufacturing cost of the plug 4 is expensive, the structure of the plug 4 is complicated, and the height of the fitting 2 is unnecessarily high.

In addition, since the conventional plug 4 is once installed in the fitting 2, the expansion plate 4d cannot be contracted so that the plug 4 cannot be removed when the plug 4 is to be removed for repair, etc. There is a problem in that the fitting (2) to be installed again in the above-described procedure.

In order to solve the problems of the prior art as described above, the inventors can remove the expansion device after installing the plug inside the fitting, thereby simplifying the structure of the plug, making the manufacturing cost cheaper, and lowering the fitting height. Developed a pipe fitting plug that can be removed from the fitting if necessary, such as after installing it on a pipe fitting, and a pipe fitting plugging machine used to install and remove the plug, and patented on August 24, 2001. An application (application number: 2001-51338) has been filed.

The pipe fitting plug 10 of this prior application is fitted in the cylindrical body 11 in which the annular groove 11a is formed in the side surface, and the annular groove 11a of the said cylindrical body 11 is shown in FIG. 3A. O ring 12, a part of the edge of the expansion plate 13 is inserted into the annular groove (2a) formed in the fitting (2), is connected to the plugging machine 20 is connected to the plugging machine 20 by the operation of the plugging machine (20) 13, the expansion device 14 extends the edge of the extension plate 13 into the annular groove 2a of the fitting 2.

As shown in FIG. 5, the expansion plate 13 has a circular shape divided into two, and a central hole 13a is formed in the center of the dividing line short in the expansion direction and long in the direction perpendicular to the expansion direction. A plurality of long holes 13b are formed at positions symmetrical with respect to the dividing line, and pins 13c are provided at positions symmetrical with respect to the center of the dividing line.

The cylindrical body 11 has a spiral groove 11b formed at a position corresponding to the long hole 13b of the expansion plate 13 so that the screw 11c is used to open the long hole 13b of the expansion plate 13. The expansion plate 13 is coupled to the cylindrical body 11 by penetrating into the spiral groove 11b, and a circular groove 11d is formed in the center of the upper surface.

The screws 11c are loosely fastened before the expansion plate 13 is expanded, and the expansion plate 13 is movable. After the expansion plate 13 is expanded, the screws 11c are firmly tightened to fasten the expansion plate 13 to the cylindrical body 11. Strongly mount

The expansion plate 13 moves only in the longitudinal direction of the long hole by the long hole 13b and the screw 11c of the cylindrical body 11.

The expansion device 14 has a lower circular portion 14a inserted into the circular groove 11d of the cylindrical body 11 and a pin 13c mounted on the expansion plate 13 to insert the pin 13c. It is formed between the upper circular portion 14b and the lower circular portion 14a and the upper circular portion 14b in which the bending long hole 14ba for moving in the extension direction of the expansion plate 13 is formed. An annular groove 14c into which the inner end of 13) is inserted and detached in the lateral direction and a connecting portion 14d connected to the plugging machine 20 are integrally formed.

As shown in FIG. 6, the bent hole 14ba is formed such that the distance between one end thereof and the center of the upper circular portion 14b is shorter than the distance between the other end thereof and the center of the upper circular portion 14b. . Therefore, when the expansion device 14 rotates while the pin 13c of the expansion plate 13 is located at one end with a relatively short distance from the center, the pin 13c and the expansion plate 13 are expanded by the bending hole 14ba. Move in the direction of

As can be seen in Figure 5, before the expansion plate 13 is expanded, a portion of its inner end is fitted into the annular groove 14c of the expansion device 14, so the expansion device 14 is coupled to the plug 10. When the expansion plate 13 is expanded, but the inner end is separated from the annular groove 14c, the expansion device 13 is in the state of FIG. 3A, and the expansion device 14 can be separated from the plug 10 and lifted up.

The connecting portion 14d of the expansion device 14 is formed with a transverse through hole 14da for engaging with the adapter 22 of the plugging machine 20 which will be described later, and is bilaterally symmetrical to receive the rotational force of the adapter 22. The coupling groove 14db into which the coupling protrusion 22b of the adapter 22 is inserted is formed in the part.

While the plug 10 is moved downward to install the plug 10 in the fitting 2, it is difficult to move the bottom of the plug 10 because the plug 10 is pressed from the bottom by the gas pressure in the pipe 1. In particular, when the diameter of the plug 10 is large, since a large force is received from the bottom, a means for equalizing the pressure of the lower space and the upper space of the plug 10 is required. In order to provide a means for equalizing the pressure of the lower space and the upper space of the plug 10, a through hole 11e is formed in the center of the cylindrical body 11, and the lower circular portion of the expansion device 14 ( On the lower surface of 14a, a horizontal gas passage 14e is formed from the center toward the edge, and a vertical gas passage 14f cut upward from the edge of each horizontal gas passage 14e is formed. ; In order to open and close the lower end of the through hole 11e of the cylindrical body 11, the housing 11fa through which the inside is penetrated, the ball 11fb inserted into the housing 11fa, and the ball 11fb are upward. An opening / closing valve 11f consisting of a spring 11fc for applying a force and a snap ring 11fd for preventing the spring 11fc from being detached is provided at the center of the lower surface of the cylindrical body 11; A downwardly extending push rod 14g for moving the ball 11fb of the on / off valve 11f downward to open the on / off valve 11f is coupled to the center of the lower surface of the expansion device 14.

In the state where the expansion device 14 is connected to the cylindrical body 11, the pushing rod 14g pushes the ball 11fb to open the through-hole 11e. Therefore, a part of the gas in the pipe 1 passes through the inside of the housing 11fa, the through hole 11e, the horizontal gas passage 14e and the vertical gas passage 14f to the center hole 13a of the expansion plate 13. Since the contact surface of the upper circular portion 14b of the expansion device 14 and the expansion plate 13 is in a loose contact state, gas flows through the contact surface to the upper portion of the plug 10.

Since the upper space of the plug 10 is also sealed during installation of the plug 10, there is no fear of gas leakage.

Therefore, the lower space and the upper space of the plug 10 become dynamic pressure, which does not interfere with the downward movement of the plug 10.

When the extension device 14 is removed after the installation of the plug 10, the rod 11g of the expansion device 14 releases the state in which the ball 11fb of the on-off valve 11f is depressed. The flow of gas is blocked because the through hole 11e is closed by moving upward by the elasticity of 11fc.

Next, the plug-in machine 20 of the earlier application used for installing or removing the plug 10 to the fitting 2 will be described. Plugging machine 20 is installed on the intermediate shut-off valve (3) to the fitting (2). The plugging machine 20 connects the connecting portion 14d of the expansion device 14 of the plug 10 to move the plug 10 downward into the fitting 2, and then rotates the expansion device 14 to expand the expansion plate 13. A part of the edge is inserted into the annular groove (2a) of the fitting (2).

The plugging machine 20 has a housing 21 fixed to the intermediate shut-off valve 3, an adapter 22 adapted to be connected to the connecting portion 14d of the expansion device 14 of the plug 10, and a longitudinal direction therein. It consists of a pipe formed with a hole, the adapter 22 is fixed to the lower end, the bushing 23a formed with a screw thread on the upper part is coupled, the rotating means 23b for rotating operation is formed on the upper housing Shanghai copper pipe 23 that moves up and down through the central through hole of 21, an airtight means 24 formed between the shank east pipe 23 and the central through hole of the housing 21, the housing 21 A guide rod (25) installed in the guide rod (25) for guiding movement of the shanghai copper pipe (23), and releasably fixed to the shanghai copper pipe (23), and installed on the guide rod (25) to move up and down along the guide rod (25). Shanghai copper pipe fixing means (26), which moves to A screw line is formed to engage with the bushing 23a of the 23 to fix the upper portion of the screw rod 27 to rotate the shank copper pipe 23, and the guide rod 25 to rotate. It consists of a screw rod fixing means 28 is installed on the top.

The adapter 22 has an insertion hole into which the connection portion 14d of the plug extension device 14 is inserted, and a through hole 22a corresponding to the transverse through hole 14da of the connector 14d is formed. And a coupling protrusion 22b is inserted into the coupling groove 14db of the coupling portion 14d, so that the coupling portion 14d of the expansion device 14 of the plug is inserted into the insertion hole and coupled to the coupling groove 14db. The expansion device 14 of the plug 10 is connected by fitting the fastening screw 22c into the through holes 22a and 14da while the 22b is fitted.

The rotating means 23b of the shanghai copper pipe 23 is illustrated as a hole formed in the shanghai copper pipe 23 in FIG. 3b, but a tool may be inserted into the hole to rotate the shanghai copper pipe, or the handle may be coupled from the beginning. You can also rotate the Shanghai copper pipe.

The airtight means 24 includes a support 24a fixed to the central through hole of the housing 21, a lower bushing 24b inserted into the support 24a, and a support above the lower bushing 24b ( A packing 24c inserted into the 24a and an upper bushing 24d screwed to the support 24a while pressing the packing 24c.

The airtight means 24 functions to move the shanghai copper pipe 23 up and down and rotate while sealing the inside of the housing 21.

As shown in FIG. 7, the shanghai pipe fixing means 26 has bushing installation holes 26ab formed at both sides thereof to install a bushing 26aa into which two guide rods 25 are movable. A first fixing tool 26a having a semicircular hole 26ac formed at the center thereof so that half of the shanghai copper pipe 23 is inserted therein; A semi-circular hole 26ba is formed to be screwed into the first fixing tool 26a so that the other half of the shanghai moving pipe 23 is inserted, and a locking screw for preventing or releasing the rotation of the shanghai pipe 23. It consists of the 2nd fixing tool 26b in which 26bb is provided.

Locking screw (26bb) is when the shanghai copper pipe 23 moves the plug 10 to the inside of the fitting (2) to tighten the shanghai copper pipe (23) so as not to rotate and the plug (10) inside the fitting (2) When the rotary device 14 is rotated in order to expand the expansion plate 13 after moving downward to a predetermined position of the lock state, the shank copper pipe 23 can be rotated. That is, the shanghai copper pipe fixing means 26 is removably fixing the shanghai copper pipe 23 by the locking screw 26bb.

An upper end of the screw rod 27 is formed to rotate the screw rod 27 by a rotation means such as a wrench.

The screw rod fixing means 28 is a bearing housing (28b) for rotatably supporting the upper portion of the screw rod (27) by installing a bearing (28a) therein, and fixed to the bearing housing (28b) both guide rods It consists of the support 28c provided in the upper end of 25.

The plugging machine 20 configured as described above is installed in the intermediate shut-off valve 3 after connecting the expansion device 14 to the adapter 22 to install the plug 10 to the fitting 2.

In this state, a portion of the inner end of the expansion plate 13 of the plug 10 is inserted into the annular groove 14c of the expansion device 14, so that the expansion device 14 and the plug 10 remain connected. And since the screw 11c of the cylindrical body 11 is in the loosely fastened state, the expansion plate 13 is in the state which can be moved to an expansion direction.

When the screw bar 27 is rotated while the intermediate shut-off valve 3 is opened, the shanghai pipe 23 and the shanghai pipe fixing means 26 are formed by the screw action of the shanghai pipe 23 with the bushing 23a. ) Moves downward.

The plug 10 should be moved downward to a position where the extension plate 13 can be extended and inserted into the annular groove 2a of the fitting 2, so that the moving distance of the shanghai copper pipe 23 is predetermined. The measurement of the moving distance is performed by reading the change of the scale inscribed on the outer surface of the shanghai copper pipe 23.

After the downward movement of the shanghai copper pipe 23 is completed, loosen the locking screw 26bb of the upward movement pipe fixing means 26, and then rotate the rotating means 23b of the shanghai copper pipe 23 to rotate the shanghai copper pipe 23. Rotate). Then, the expansion plate 13 of the plug 10 is extended so that a part of the edge is inserted into the annular groove 23a of the fitting 2.

In this state, the inner end of the expansion plate 13 is separated from the annular groove 14c of the expansion device 14 of the plug 10 and the plug 10 is not lifted up by the gas pressure of the lower space of the plug 10. Since it is in the state, the Shanghai copper pipe 23 is moved upward, and the expansion device 14 is separated from the plug 10 and raised.

After removing the plugging machine 20 and the intermediate shut-off valve 3, the screw 11c of the cylindrical body 11 is tightened strongly, and the cover plate 5 is placed on the top of the fitting 2 as shown in FIG. 4 for safety. ).

In this way, after the installation of the plug 10, the expansion device 14 can be separated from the plug 10, so that the manufacturing cost of the plug 10 becomes inexpensive, and the expansion device 14 can be continuously used as a tool. have.

In addition, since there is no expansion device 14 in the installed plug 10, the height of the fitting 2 does not need to be unnecessarily high, thus making the fitting cost of the fitting 2 low.

On the other hand, when the plug 10 installed in the fitting 2 is to be removed for repair of the pipe 1, the cover plate 5 is removed from the fitting 2, and then the screw 11c of the cylindrical body 11 is removed. Loosely loosen and install the intermediate shut-off valve (3) and the plugging machine (20) to the fitting (2) can remove the plug 10 by the installation procedure and the reverse procedure.

However, the plugging machine 20 of the above-mentioned application is relatively complicated in structure, and the manufacturing cost is high, and the screw rod 27 is used to move the Shanghai copper pipe 23 downward in order to install the plug 10 in the fitting 2. Rotation) from the beginning to move down the Shanghai copper pipe 23 and the plug 10 there is a problem that takes a lot of time for installation work.

In addition, the plugging machine 20 has a slight deviation in its centerline due to the dimensional tolerance of each component. The plug 10 is visually approaching the fitting 2 during the installation of the plug 10. Unobservable so that the center of the plug 10 and the center of the fitting 2 cannot be exactly matched, and also the height at which the expansion plate 13 of the plug 10 can be inserted into the annular groove 2a of the fitting 2. There is a problem that the plug installation failure occurs because it can not accurately determine whether the location.

The present invention has been made to solve the above-mentioned problems of the prior art, the purpose is to provide a plugging machine for pipe fittings that can be installed quickly and simply when the structure is simplified to lower the manufacturing cost and install the plug in the fitting. I am doing it.

Another object of the present invention is to allow the user to visually observe the state of the plug approaching the fitting during installation of the plug, so that the center of the plug and the center of the fitting can be exactly matched, and the extension of the plug can be inserted into the annular groove of the fitting It is to provide a plugging machine for pipe fitting that can be visually confirmed whether it is located at a height.

The plug fitting machine for pipe fitting of the present invention for achieving the above object is fixed to the intermediate blocking valve housing is formed in the through-hole in the center of the upper wall, guide hole is formed in the center as being installed in the through-hole of the housing It is inserted into the through hole of the installation shaft guide member, the installation shaft guide member having a male thread formed on the upper outer surface, and is moved to the lower end is connected to the connecting portion of the expansion device of the plug and the pressing jaw is formed in the middle portion An installation shaft, which is installed to be movable above the pressing jaw of the installation shaft, and a handle for plugging in which a hub having a female thread line for screwing with a male thread line of the installation shaft guide member is formed, and an upper end of the installation shaft. It consists of a fixed expansion plate fastening handle.

In the pipe fitting plugging machine of the present invention for achieving the above another object, the upper wall of the housing is made of a transparent body.

1 is a cross-sectional view of the fitting in the state in which the intermediate shut-off valve is installed in the fitting in order to install a conventional pipe fitting plug

Figure 2 is a cross-sectional view of the fitting showing a state in which a conventional pipe fitting plug is installed

Figure 3a is a cross-sectional view showing a state in which the fitting for the pipe fitting of the prior application design to the fitting,

3b is a cross-sectional view of a plugging machine of the inventive design used to install and remove a plug;

4 is a cross-sectional view showing a state in which the plug for the pipe fitting of the design of the prior application completely installed in the fitting,

Figure 5 is a plan view of the expansion plate that is a component of the plug for pipe fittings of the present invention design,

6 is a plan view of the expansion device that is a component of the plug for pipe fittings of the present invention;

7 is a cross-sectional view of the shanghai copper pipe fixing means, which is a component of the plugging machine of the present invention devised by cutting line A-A in FIG.

8 is a cross-sectional view showing the configuration of the plugging machine for pipe fitting of the present invention.

<Explanation of symbols for the main parts of the drawings>

1: Piping 2: Fitting

2a: annular groove 3: intermediate blocking valve

4: Plug 4a: annular groove

4b: cylinder 4c: O ring

4d: Expansion 4e: Expansion

5: cover plate

10: plug 11: cylindrical

11a: annular groove 11b: spiral groove

11c: screw 11d: round groove

11e: through hole 11f: on-off valve

11fa: housing 11fb: ball

11fc: spring 11fd: snap ring

12: O ring

13: extension 13a: center hole

13b: long hole 13c: pin

14: expansion device 14a: lower circular portion

14b: upper circular part 14ba: bent long

14c: annular groove 14d: connection

14da: transverse through hole 14db: coupling groove

14e: horizontal gas passage 14f: horizontal gas passage

14g: straw

20: plugging machine 21: housing

22: adapter 22a: through hole

22b: engaging protrusion 22c: tightening screw

23: Shanghai East Pipe 23a: Bushing

23b: rotation means 24: airtight means

24a: support 24b: lower bushing

24c: packing 24d: upper bushing

25: guide rod 26: Shanghai East pipe fixing means

26a: first fixture 26aa: bushing

26ab: bushing hole 26ac: semicircular hole

26b: second fixing hole 26ba: semicircular hole

26bb: Locking screw 27: screw rod

28: screw rod fixing means 28a: bearing

28b: bearing housing 28c: support

30: plugging machine 31: housing

31a: upper wall 32: mounting shaft guide member

32a: flange 32b: nut

33: mounting shaft 33a: pressing jaw

33b: tightening screw 33c: sealing member

34: Handle for plugging in 33a: hub

34b: Thrust bearing 35: Handle for expansion plate fastening

35a: thread 36: tension spring

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

8 is a cross-sectional view showing the configuration of the plugging machine for pipe fitting of the present invention.

As shown, the plug fitting machine 30 for pipe fitting according to the present invention is fixed to the intermediate shut-off valve 3 and has a housing 31 having a through hole formed in the center of the upper wall 31 a, and the housing 31 of the housing 31. It is installed in the central through-hole, the guide hole is formed in the center and the installation shaft guide member 32, the male threaded line is formed on the upper outer surface, inserted into the through-hole of the installation shaft guide member, the lower end plug It is connected to the connecting portion 14d of the expansion device 14 of the 10 and the installation shaft 33, the pressing jaw 33a is formed in the middle portion, the movement of the mounting jaw 33a of the mounting shaft 33 It is installed so as to enable the plug fastening handle 34 and the mounting shaft 33 of the hub (34a) is formed with a female threaded wire threaded to the male threaded line of the mounting shaft guide member 32, It is fixed to the top to rotate the installation shaft 33 Includes an extension plate fastening handle 35.

The upper wall 31a of the housing 31 visually observes the state in which the plug 10 approaches the fitting 2 when the plug 10 is installed in the fitting 2, and centers the plug 10. The expansion plate 13 is made of a transparent body so that it can be visually confirmed whether it is located at a height that can be inserted into the annular groove (2a) of the fitting (2).

A discharge nozzle (not shown) may be installed on the sidewall of the housing 31 to remove the gas in the housing 31 when the installation of the plug 10 is completed.

The installation shaft guide member 32 is installed at the central through hole of the upper wall 31 a of the housing 31, and a flange 32 a is formed in the middle and penetrates through the central through hole of the upper wall 31 a. The screw thread is formed on the outer circumferential surface of the lower portion protruding downward so that the nut 32b is fastened to the screw thread portion and fixed to the upper wall 31a.

The mounting shaft 33 has a diameter smaller than that of the upper portion of the pressing jaw so that the pressing jaw 33a is pressed downward by the hub 34a of the plug fastening handle 34, and the mounting shaft 33 The top of the) is a rectangular cross section so that it can rotate together by the rotation of the expansion plate fastening handle 35.

A sealing member 33c is installed between the installation shaft guide member 32 and the installation shaft 33 to prevent the leakage of gas during the plug installation operation.

The plug fastening handle 34 is provided with a thrust bearing 34b at the lower portion of the central through hole to facilitate the rotation thereof.

The male thread wire of the installation shaft guide member 32 and the female thread wire of the hub 34a of the plug fastening handle 34 screwed thereto are preferably formed of square screws because they are not fastening but exercise.

The expansion plate fastening handle 35 is fixed to the upper end of the installation shaft 33, a square hole is formed in the center to be combined with the upper end of the square end of the installation shaft 33, the screw on the upper end of the installation shaft 33 A ball is formed and fastened by fastening a screw (35a) having a wide flange formed in the screw hole of the installation shaft (33).

Between the plug fastening handle 34 and the expansion plate fastening handle 35, the plug fastening handle 34 is brought into close contact with the pressing jaw 33a of the installation shaft 33, and the expansion plate fastening handle 35 is screwed to the screw. A tension spring 36 is provided to make close contact with the flange of 35a.

The process of installing the plug 10 to the fitting 2 of the pipe using the plugging machine 30 of the present invention configured as described above will be described.

First, the plug 10 and its expansion device 14 are connected in a conventional manner, and then the coupling portion 14d and the installation shaft 33 of the expansion device 14 are coupled to each other, and then between the installation shaft 33 and the connection portion 14d. Tighten the tightening screw (33b). And the housing 31 is installed in the intermediate | middle shutoff valve 3.

Next, the mounting shaft 33 is moved downward by pushing the plug fastening handle 34 downward and pressing the pressing jaw 33a of the mounting shaft 33. Then, the lower end of the hub 34a of the plug fastening handle 34 comes into contact with the installation shaft guide member 32. At this time, the plug 10 approximately approaches the installation location of the fitting 2.

At this time, the female screw portion of the hub 34a is rotated by rotating the plug fastening handle 34 while observing that the center of the plug 10 coincides with the center of the fitting 2 through the transparent upper wall 31a of the housing 31a. And screw the male screw portion of the installation shaft guide member 32 to gradually move the installation shaft 33 downward. If the center of the plug 10 and the center of the fitting 2 do not coincide with each other, the installation shaft 33 is moved in the transverse direction in the dimensional tolerance range.

When the extension shaft 13 of the plug 10 is lowered to a height at which the extension plate 13 of the plug 10 can be inserted into the annular groove 2a of the fitting 2, the extension plate fastening handle 35 is rotated 90 degrees. By the expansion plate 13 is inserted into the annular groove (2a) of the fitting (2).

The housing 31 is then removed from the intermediate shut-off valve 3 to remove the expansion device 14 coupled to the plugging machine 30 and the mounting shaft 33 and then the intermediate shut-off valve 3 from the fitting 2. After removing, the screw 11c of the installed plug 10 is firmly tightened to strongly couple the cylindrical body 11 and the expansion plate 13, and the cover plate 5 is coupled to the fitting 2 to complete the installation of the plug. .

As described above, the plugging machine for pipe fitting of the present invention has a simple structure, which lowers the manufacturing cost and can be quickly and simply installed when the plug is installed in the fitting. This ensures that the center of the plug and the center of the fitting are exactly matched, and that the plug's extension is located at a height that can be inserted into the annular groove of the fitting.

The present invention is not limited to the embodiments described, it is apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the present invention.

Therefore, such modifications or modifications will have to fall within the scope of the utility model registration claim of the present invention.

Claims (3)

The housing 31 is installed in the intermediate shut-off valve 3, the through-hole is formed in the center of the upper wall (31a), As installed in the central through-hole of the housing 31, the guide hole is formed in the center and the installation shaft guide member 32, the male screw line is formed on the upper outer surface, It is inserted into the through hole of the installation shaft guide member 32 and is moved to the lower end portion is connected to the connecting portion 14d of the expansion device 14 of the plug 10, the pressing jaw 33a is formed in the middle portion Mounting shaft (33), Plug which is installed so as to be movable above the pressing jaw (33a) of the mounting shaft 33 is formed a hub (34a) is formed with a female thread line for screwing the male thread line of the mounting shaft guide member 32 Fastening handle 34, and The pipe fitting plugging machine, characterized in that it comprises a handle for fixing the expansion plate fastening fixed to the upper end of the installation shaft 33, the installation shaft 33. 2. The plugging machine for piping fitting according to claim 1, wherein the upper wall (31a) of the housing (31) is made of a transparent body. The method of claim 1, wherein the plug fastening handle 34 is in close contact with the pressing jaw (33a) of the mounting shaft 33 between the plug fastening handle 34 and the expansion plate fastening handle 35, A plugging machine for pipe fittings, characterized in that a tension spring (36) is provided to bring the (35) into close contact with the flange of the screw (35a).