JPH0135991Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a pipe grip for a pipe support device used to connect a pipe to a support device such as a snubber.

[Conventional technology]

For example, piping in various chemical plants and nuclear power plants is supported using pipe support devices such as snubbers, hangers, and struts. Conventionally, when connecting these pipe support devices to a pipe, a pair of two-piece clamp fittings each having an arcuate support surface that follows the outer shape of the pipe are placed facing each other across the pipe and tightened with bolts. The pipe was fixed by tightening between the arcuate support surfaces of the metal fittings. However, with this structure, not only is the weight quite heavy, especially for large-diameter pipes, but also the bending rigidity of the clamp fittings is relatively high, and there are dimensional tolerances, etc. There are cases where it is difficult to restrain in the rotational direction.

Therefore, the inventor of the present invention developed a pipe grip using wire rope (Utility Application No. 57-65972 (Utility Model Application No.
(Refer to Publication No. 167384)). This thing is
A support base (mounting fitting) having a support surface that circumscribes the pipe to be supported, and a wire rope that is wrapped around the pipe and has both ends locked to wire support parts of the support base to tighten the pipe. It is equipped with A single lock with a threaded end is secured to at least one end of the wire rope. A nut is screwed into the threaded end, and by tightening it to the wire support section, the wire rope is adjusted to a desired tension and tightened in the pulling direction.

[Problem that the invention attempts to solve]

However, since the wire rope can rotate relatively freely around the axis, the wire rope rotates when tightening or loosening the nut on the screw end of the single lock in the above structure, making tightening work difficult and difficult. Ta. Additionally, forcibly twisting the wire rope may damage the wire rope and reduce its durability.

[Means for solving problems]

The present invention includes a support base having a support seat that is in contact with the outer surface of the tube to be supported either directly or via a mount member, and which is wrapped around the tube and has both ends locked to the wire support portion of the support base. Accordingly, the present invention is applied to a pipe grip for a pipe support device, which is equipped with a wire rope for tightening and fixing the pipe.

In the present invention, an end member having a threaded end is fixed to at least one end of the wire rope, and a nut is screwed to the threaded end to attach the wire rope to the wire support part. A receptacle that can be tightened in the traction direction and that has a non-circular cross-sectional shape in the radial direction forming a detent part in a portion of the end member having the threaded end, and that the detent part is locked to the wire support part. It is characterized by having a section.

[Effect]

In the pipe grip with the above structure, the non-circular cross section anti-rotation part provided on the end member having a threaded end is locked to the receiving part provided on the wire support part of the support base, so when turning the nut, It is possible to prevent the end member, that is, the wire rope, from rotating together. Therefore, the workability when tightening or loosening nuts is greatly improved. Furthermore, since the wire rope is not twisted when rotating the nut, the wire rope is not damaged.

In the pipe grip of the present invention, by rotating the nut, the wire rope tightens the outer surface of the pipe with a desired tension, thereby firmly fixing the pipe to the support base. Also, attach the wire rope to the tube.
If the wire rope is wrapped more than 10 times, the pipe can be firmly restrained without rotational deviation due to the braking action of the wire rope.

〔Example〕

In one embodiment shown in FIGS. 1 to 5, a support base 10 made of metal such as steel has a pair of parallel plate-shaped portions 11 and 12 at the front and rear. On the lower surface side of these plate-like parts 11 and 12 in the drawing, there is provided an arc-shaped support seat 1 having a curvature corresponding to the outer diameter of the pipe A to be supported.
1a and 12a are provided, and these support seats 1
1a and 12a are in contact with the outer surface of the tube A.

Further, the upper end portions of the plate portions 11 and 12 in the drawing are connected to each other by a load pin 15, and one end side of an earthquake-resistant pipe support device 16 such as a snapper, strut, hanger, etc. is connected using this pin 15. The other end of the tube support device 16 is connected to a support structure such as a beam (not shown).

A pair of parallel support plates 1 are provided on both the left and right sides of the plate-like parts 11 and 12, respectively, along the axial direction of the tube A.
8 are fixed and constitute wire support parts 20 and 21. A pair of arcuate recesses 24 are formed in each of the wire support parts 20 and 21, spaced apart in the axial direction of the tube A. Each recess 24 has a semi-cylindrical movable washer 2 as shown in FIG.
8 is fitted. Each movable washer 28 can freely rotate on the arcuate surface of the recess 24. Further, each of the movable washers 28 has a through hole 30 formed therein.

And across the wire support parts 20 and 21,
A pair of front and rear wire ropes 33 are provided. These wire ropes 33 are steel-core structural wire ropes, and are wound around the outer surface of the tube A by about one and a half turns. End members 37 are fixed to both ends of each wire rope 33, respectively.

Each end member 37 has the same structure. That is, as shown in FIG.
7 is a cylindrical part 38 into which the end of the wire rope 33 is inserted and fixed, and a screw end 39 provided at the end.
and a rotation preventing portion 40 located between the cylindrical portion 38 and the screw end 39.

After the end of the wire rope 33 is inserted, the cylindrical portion 38 is welded by a swaging process and is firmly integrated with the wire rope 33. The detent part 40 has a larger outer diameter than the cylindrical part 38, and has a non-circular cross-sectional shape in the radial direction by forming a pair of parallel flat parts 43 as shown in FIG. . Distance l between plane parts 43, 43
is set to be slightly narrower than the distance between the support plates 18, 18 described above. Therefore, the rotation prevention part 40 can be guided and fitted between the support plates 18, 18, but rotation is prevented in the axial direction by hitting the mutually parallel inner walls of the support plates 18, 18. Ru. Therefore, the inner walls of the support plates 18, 18 function as a receiving part 45 for locking the rotation stop part 40.

The screw end 39 is inserted into a through hole 30 formed in the movable washer 28, and a nut 50 is screwed into the screw end 39. The nut 50 tightens the wire rope 33 with a desired tension in the pulling direction. As shown in the illustrated example, loosening is achieved by a locking nut method in which nuts are stacked in two layers, or by a split pin or other appropriate means.

In addition, as shown in FIG. 6, the support seat 11a,
The local stress generated in the tube A may be alleviated by interposing a mount member 52 between the tube 12a and the tube A, which is made of a mesh tangled body formed by intertwining metal wires such as stainless steel wires and compression-molding them. This is suitable when the wall thickness of the tube A is relatively thin.

According to the pipe grip having the above configuration, the nut 5
By rotating the wire rope 33 to apply a desired tension to the wire rope 33, the support base 10 and the wire rope 33 can tighten the tube A with the desired strength.

Since the wire rope 33 has low bending rigidity, it easily conforms to the outer circumferential surface of the pipe and has excellent adhesion, is less likely to cause local stress, and has a strong tightening force.
Relative rotation and axial displacement of the tube A can be effectively prevented. It is also lightweight despite its high rigidity. In addition, since the wire rope 33 is highly elastic, the tightening force is less likely to decrease due to creep, etc., and since it is wound about one and a half turns around the outer circumference of the pipe A, it can provide sufficient braking force against relative rotation. arise. Therefore, even when a vibration-proofing or earthquake-proofing device such as a snubber, a hanger, or a strut is used in the tube support device 16, these functions can be fully exerted.

According to the pipe grip of this embodiment, the detent portion 40 at the end of the wire is connected to the wire support portion 20,
Since the wire rope 33 can be prevented from rotating by being locked to the receiving portion 45 of the nut 50, the wire rope 33 will not rotate together when tightening or loosening the nut 50. This greatly improves the workability of tightening pipe grips.

Moreover, since the movable washer 28 is rotatably fitted into the arc-shaped recess 24, even if the end of the wire rope 33 is bent in the tube axis direction, the end member 37 will rotate in the direction in which the force is applied. be able to. Therefore, excessive bending can be prevented from being applied to the wire rope 33 near the cylindrical portion 38.

Further, according to the above structure, even when the wire rope is attached to the bent part A' of the pipe as shown in FIG. Excessive bending is no longer applied to the end of pipe 33, and the bent part of the pipe is
It becomes easy to apply to A′.

FIG. 8 shows another embodiment of the invention. In this embodiment, a pair of load pins 15 are provided on the support base 10, and a pair of support devices 16, 1 are connected via each pin 15.
6 are connected to support in two directions.
However, since the basic structure and operation are the same as those of the previous embodiment, the same reference numerals are given to the common parts and the explanation thereof will be omitted.

Note that the wire rope 33 may be wound around the tube A twice or more. Alternatively, if the support device 16 is to simply support the weight of the tube A using a spring hanger or the like, the wire rope 33 may be wound around the tube A by about half a turn. In addition, the wire rope 33
An end member 37 having the above structure is adopted only on one end side of the
The other end side is attached to the support base 1 by a well-known general means.
It may be connected to 0.

[Effect of idea]

According to the present invention, in a pipe grip in which a pipe is restrained to a support base using a wire rope, when the nut that tightens the wire rope to a desired tension is rotated, the wire rope does not rotate together, and the installation work and Tightening work, etc. is facilitated, and damage to the wire rope can be prevented.

[Brief explanation of drawings]

Figures 1 to 5 show an embodiment of the present invention, in which Figure 1 is a front view with a part of the pipe grip cut away, Figure 2 is a side view, and Figure 3 is a partially cutaway side view of the pipe grip. FIG. 4 is a cross-sectional view taken along the - line in FIG. 3, FIG. 5 is a perspective view of the movable washer, and FIG. 6 is a front view showing a part of the pipe grip using the mounting member. be. FIG. 7 is a side view when the device is attached to a bent portion of a pipe, and FIG. 8 is a front view showing another embodiment of the present invention. A...Pipe, 10...Support base, 11a, 12
a...Support seat, 16...Pipe support device, 20, 21
...Wire support part, 24...Circular recess, 28...
...Movable washer, 33...Wire rope, 37...End member, 38...Cylindrical part, 39...Screw end, 4
0... Rotating part, 45... Receiving part, 50... Nut, 52... Mounting member.

Claims (1)

[Claims for Utility Model Registration] A support base having a support seat that is in contact with the outer surface of a pipe to be supported directly or via a mount member, and a wire support part of the support base that is wrapped around the pipe and has both ends attached to the wire support part of the support base. A pipe grip for a pipe support device comprising a wire rope that tightens and fixes the pipe by being locked, an end member having a threaded end fixed to at least one end of the wire rope;
By screwing a nut into this threaded end, this wire rope can be tightened to the wire support part in the rope pulling direction, and a part of the end member having the threaded end has a non-circular radial cross-sectional shape. A pipe grip for a pipe support device, characterized in that a rotation prevention part is formed, and the wire support part is provided with a receiving part for locking the rotation prevention part.