JPH0135814Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention is a pipe flange installation method for screwing and fastening a pipe flange to the end of a pipe in order to connect pipes such as gas pipes, water pipes, and plant pipes. Regarding tools for use.

[Conventional technology]

Conventionally, when connecting relatively large-diameter pipes to each other, a male thread was formed at the end of the pipe, and a female thread formed on the pipe flange was screwed into the male thread to be attached to each pipe. The flanges were connected by bolting them together. When the pipe flange is screwed onto the end of the pipe, a so-called chain wrench that wraps around the outer periphery of the pipe flange is used to perform the fastening operation.

[Problem that the invention attempts to solve]

If you use the chain wrench mentioned above to perform fastening work, there is a risk that the chain wrench will slip off the pipe flange, and you will have to wind it each time, which is time-consuming and makes work at heights difficult. there was. In addition, there is a high possibility that the anti-corrosion film applied to the surface of the pipe flange will be damaged by the slippage of the chain wrench, resulting in a disadvantage in that the appearance will be impaired. Therefore, the present invention provides a tool that facilitates the fastening work and prevents damage to the appearance of the corrosion-preventing film and the like.

[Means for solving problems]

The technical means is a tool 6 that screws together the female threaded part 4 of the pipe flange 3 with the male threaded part 2 formed at the end of the pipe 1, and the tool body 7 is provided with a turnbuckle-structured screw that can be rotated freely. A shaft 8 is provided, a rotation operation part 15 is provided at the end of the screw shaft 8, and a right-hand threaded portion 12 on one side of the screw shaft 8 and a left-hand threaded portion 13 on the other side cannot rotate relative to the tool body 7. An engagement nut body 9 is screwed into each of the screw shafts 8 so as to be movable in the longitudinal direction, and an engagement shaft 19 is provided protruding from each engagement nut body 9 to be inserted into the bolt insertion hole 5 of the pipe flange 3. At the same time, the protruding end of each engagement shaft 19 is provided with a locking portion 20 that locks on the peripheral edge of the bolt insertion hole 5, and the tool body 7 has a fastening operation portion that rotates the body 7. 11 is provided.

[Effect]

According to the present invention, the distance between each engagement shaft 19 of each engagement nut body 9 is adjusted by rotating the rotation operation part 15, and each engagement shaft 19 is inserted into the bolt insertion hole 5 of the pipe flange 3. After that, the rotation operation part 15 is rotated to lock the locking part 20 of each engagement shaft 19 to the peripheral edge of the bolt insertion hole 5. Here, the pipe flange 3 and the tool 6 are integrally connected. By rotating the fastening operation part 11, the pipe flange 3 can be rotated together with the tool body 7, and the pipe flange 3 can be screwed onto the pipe 1. As described above, since the tool 6 is rotated to attach the pipe flange 3 with the tool 6 integrally connected to the pipe flange 3, there is no risk of the tool 6 coming off from the pipe flange 3.
Fastening work can be easily performed even at high places. In addition, each engagement shaft 1 inserted into the bolt insertion hole 5
Since the pipe flange 3 is rotated and screwed together through the pipe 9, there is no risk of damage to the appearance of the corrosion-preventing film or the like.

〔Example〕

Hereinafter, the first embodiment of the present invention will be described based on the drawings. In FIGS. 1 to 3, 1 is a relatively large diameter pipe for water, gas, etc., and the end thereof has a male threaded part 2. is formed. Reference numeral 3 designates a pipe flange, in the center of which a female threaded portion 4 is formed to be screwed into the male threaded portion 2, and on the outer periphery, four bolt insertion holes 5 are formed at predetermined intervals in the circumferential direction. ing. Reference numeral 6 denotes an attachment tool for attaching the pipe flange 3 to the pipe 1, and includes an elongated flat tool body 7, a threaded shaft 8, and a pair of engaging nut bodies 9. A concave groove 10 is formed in the longitudinal direction on one side of the tool body 7, and on the other side, a six-piece hole having the same shape and size as the head of the bolt for fastening the pipe flanges 3, 3 to each other is provided at the center in the longitudinal direction. A rectangular columnar fastening operation part 11 is fixed by welding or the like. The threaded shaft 8 has a right-handed threaded portion 12 formed on one side and a left-handed threaded portion 13 on the other side. The screw shaft 8 is longer than the tool body 7, and is loosely inserted into the groove 10 of the tool body 7 with both ends protruding.
The tool body 7 is rotatably mounted by fastening each mounting member 14 inserted onto both ends of the screw shaft 8 to both sides of the tool body 7. Further, rotation operation knobs 15 as rotation operation parts are fitted onto both protruding ends of the screw shaft 8, and the screw shaft 8 is fitted with a roll pin 16 or the like.
Fixed. 17 is Watshiya. Each of the engaging nut bodies 9 includes a substantially cubic nut body 18 that is screwed into the right-hand threaded portion 12 and the left-hand threaded portion 13 of the screw shaft 8, respectively, and a nut body 18 that protrudes from one side of each nut body 18 by an appropriate length. It includes an engagement shaft 19 and locking portions 20 that project in directions away from each other from the protruding end portions of each engagement shaft 19, that is, in the up and down direction in FIG. As shown in FIG. 3, the locking portion 20 is formed in a circular shape with a smaller diameter than the bolt insertion hole 5 of the pipe flange 3, and the engagement shaft 19 is formed in a substantially elliptical shape. The nut body 18 of each engagement nut body 9 is screwed into the right-hand threaded portion 12 and left-hand threaded portion 13 of the screw shaft 8, respectively, and is housed in the recessed groove portion 10 of the tool body 7. 19 is made to project laterally. And each nut body 18
is configured so that it cannot rotate around the screw shaft 8 by engaging with the groove 10, that is, it cannot rotate relative to the tool body 7, and in the longitudinal direction of the screw shaft 8 along the groove 10. It is structured so that it can be moved freely.
By rotating the rotary operation knob 15 at the end of the screw shaft 8, the respective engaging nut bodies 9 screwed onto the right-hand threaded portion 12 and the left-hand threaded portion 13 of the screw shaft 8 can be adjusted in distance from each other. It is constructed as a so-called turnbuckle structure that can be freely adjusted for expansion and contraction. Also, the tool body 7
A recess 21 is formed in the center of one side, scales 22 are provided on both sides of the recess 10, and alignment marks 23 are provided on the engaging nut body 9.

The first embodiment of the present invention is constructed as described above, and when attaching the pipe flange 3 to the pipe 1, the female threaded part 4 of the pipe flange 3 is lightly screwed into the male threaded part 2 of the pipe 1. . Then, when tightening after that, the rotation operation knob 1 of the installation tool 6
5 to adjust the distance of each engaging nut body 9 to the distance of the bolt insertion hole 5 corresponding to the radial direction of the pipe flange 3, and then rotate the engaging shaft 1 of each engaging nut body 9.
9 is inserted into the bolt insertion hole 5. Thereafter, the rotation operation knob 15 is rotated to lock each engagement nut body 9.
As shown in FIG. 2, when the locking portions 20 of each engaging shaft 19 are locked to the peripheral edge of the bolt insertion hole 5, the pipe is held in place and held in place. The flange 3 and the installation tool 6 are integrally connected. Thereafter, by engaging the hexagonal wrench 24 corresponding to the fastening operation part 11 and rotating it, the pipe flange 3 is rotated together with the tool body 7, and the pipe flange 3 is screwed and fastened to the pipe 1 here. . Moreover, after fastening, by rotating the rotation operation knob 15 and slightly moving each engagement nut body 9 in the direction of approaching each other, each locking part 20 and the peripheral edge of the bolt insertion hole 5 can be engaged with each other. The lock is released and the installation tool 6 can be removed from the pipe flange 3. As described above, the installation tool 6 is configured to rotate and fasten the pipe flange 3 in a state where the installation tool 6 and the pipe flange 3 are integrally connected, so the installation tool 6 may come off inadvertently. There is no fear,
Stable working conditions can be ensured, fastening work can be performed easily, and even work at high places can be performed easily. In addition, since the pipe flange 3 is configured to be rotated and screwed together via each engagement shaft 19 inserted into the bolt insertion hole 5 of the pipe flange 3, even if the pipe flange 3 is coated with a corrosion prevention film. The only part that is likely to be damaged is the part of the bolt insertion hole 5, which is covered by bolting to the opposing pipe flange 3 and does not cause any problem to the appearance. Furthermore, since the tool body 7 is formed into an elongated flat plate shape, there is less material to be removed.
Lighter weight can be achieved. Further, the distance between the bolt insertion holes 5 of the pipe flange 3 can be adjusted in advance using the scale 22, which is very convenient. Further, the recess 21 allows the tip of the pipe 1 to be screwed into the female threaded portion 4 of the pipe flange 3 to be visually recognized, and it is possible to prevent the tip of the pipe 1 from being overtightened by protruding from one side of the pipe flange 3. Furthermore, since the fastening operation part 11 is formed in the shape of a hexagonal column with the same shape and size as the head of the bolt that fastens each pipe flange 3, one type of hexagonal wrench 2 can be used.
4, the pipe flanges 3 can be attached and each pipe flange 3 can be fastened with bolts, which is very convenient.

Note that although a configuration in which a hexagonal wrench 24 is connected to the fastening operation section 11 for rotation operation is shown, a structure may be adopted in which a lever for rotation operation is integrally provided on the fastening operation section 11. .

FIG. 4 shows a second embodiment, in which operating rods as the fastening operating portion 11 are screwed onto both sides of the tool body 7.

Further, in each of the above embodiments, the locking portions 20 provided on each engagement shaft 19 are configured to project outward from each other, but they may also be configured to project inward. .

[Effect of idea]

According to the present invention, the engagement shaft of each engagement nut body is inserted into the bolt insertion hole of the pipe flange, and the locking part of each engagement shaft is locked to the peripheral edge of the bolt insertion hole, so that the pipe flange and the tool can be connected. The pipe flange is screwed onto the pipe by rotating the tool while the pipes are integrally connected, so there is no risk of the tool accidentally coming off the pipe flange, and stable working conditions can be ensured. Fastening work can be easily performed, and even work at high places can be performed easily. Further, since the pipe flange is rotated and screwed together via each engagement shaft inserted into the bolt insertion hole of the pipe flange, there is an advantage that there is no risk of damage to the appearance of the corrosion-preventing film or the like.

[Brief explanation of drawings]

FIG. 1 is an exploded side view showing the first embodiment of the present invention, FIG. 2 is a side view showing the assembled state, FIG. It is a bottom view showing an example. 1... Pipe, 2... Male threaded part, 3... Pipe flange, 4... Female threaded part, 5... Bolt insertion hole, 6... Installation tool, 7... Tool body, 8... Screw shaft, 9... Engaging nut body, 11... Fastening operation part, 12... Right threaded part, 13... Left threaded part, 15
... Rotating operation knob, 19 ... Engagement shaft, 20 ... Locking part.

Claims (1)

[Scope of utility model registration request] A tool 6 for screwing together a female threaded part 4 of a pipe flange 3 with a male threaded part 2 formed at the end of a pipe 1, and a tool body 7 is provided with a turnbuckle structure screw shaft 8 that can be rotated freely, A rotation operation part 15 is provided at the end of the screw shaft 8, and a tool body 7 is provided at one right-hand threaded part 12 and the other left-hand threaded part 13 of the screw shaft 8.
An engaging nut body 9 is screwed into each engaging nut body 9 so as to be immovable relative to the threaded shaft 8 and movable in the longitudinal direction of the screw shaft 8. The mating shafts 19 are provided in a protruding manner, and a locking portion 20 is provided at the protruding end of each of the mating shafts 19 to be secured to the peripheral edge of the bolt insertion hole 5. A pipe flange installation tool characterized by being provided with a fastening operation part 11 that can be rotated.