JPH057356Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a pipe clamp device for clamping pipes of various diameters, and in particular to a pipe clamp device suitable for a pipe conveying device used in an oil drilling rig. .

(Prior art) Conventionally, when drilling an oil field on land or under the sea using an oil drilling rig, a large number of pipes (drilling pipes,
Casing pipe, riser pipe) will be used to excavate deep into the soil.

A large number of the pipes are stored in a pipe rack near the drilling tower, sorted by diameter and type, and it is necessary to transport these pipes one by one from the pipe rack to the drill floor of the drilling tower.

Therefore, conventionally, as shown in FIG. 4, a bridge crane 101 is provided which can move above the pipe storage formed in the pipe rack 102 on one side of the drilling tower 100, and a bridge crane 101 is provided at both ends of the bridge crane 101 as shown in FIG. A pipe conveying device having a hook-type pipe clamping device that is provided with a hook 104 that can be raised and lowered as shown in FIG. Pipes 10 of different diameters are attached to a bridge crane 101 as shown.
Pipe clamp device 105 that clamps each pipe.
Pipe clamp devices 105A, 105 suitable for the diameter, with A, 105B, and 105C movable up and down.
A pipe conveying device is used that has a pipe clamp device with a combination of clamps that grips and conveys the pipe 103 with B and 105C.

On the other hand, Japanese Unexamined Patent Publication No. 55-161191 describes two types of pipe clamp devices that are installed in oil drilling equipment and can clamp pipes of various diameters.

The first pipe clamp device (No. 20 of the publication)
21), a pair of left and right jaw members are attached to the clamp body so that they can be opened and closed, and these jaw members can be driven open and closed by a hydraulic motor via a rack and pinion mechanism. It is configured to clamp the pipe with a metal member. The second clamp device (Figures 32 and 33 of the publication)
In Figure), a pair of left and right jaw members are attached to the clamp body so that they can be opened and closed, and a V-shaped pipe holding part is formed on one jaw member. Attach the fingering metal to the hinge part,
The pair of jaw members can be driven open and closed by a hydraulic motor via a rack and pinion mechanism, and the pipe is held by the jaw members and the finger metal.

On the other hand, Japanese Utility Model Application No. 50-119209 describes a clamping device that is attached to the undulating beam of a civil engineering construction vehicle and used for transporting wood or the like. This clamp device has one left and right one at the bottom end of the clamp body.
A pair of curved root-side claw members are attached to each other via front-rearward pins so as to be able to swing open and close, and a curved tip-side claw member is attached to the lower end of each base-side claw member to open and close via front-rear pins. There are 0 pairs of opening/closing hydraulic cylinders on the left and right which are swingably provided to swing open and close a pair of left and right root-side claw members, respectively, and also drive a tip-end claw member to swing relative to each root-side claw member. It is equipped with a hydraulic cylinder for relative refraction.

(Problems to be Solved by the Invention) In the hook-type pipe clamp device of the pipe conveying device, when the hook is engaged with the end of the pipe, a protection is provided to protect the connecting screw portion provided at the end of the pipe. It is necessary to remove the cap and engage the hook with the end of the pipe, which not only requires a great deal of labor and time, but is also often dangerous.

Furthermore, the hooks engaged with both ends of the pipe may damage the threads of the connecting thread, making the pipe unusable.

On the other hand, when a pipe clamp device is provided that is suitable for each pipe having a diameter within a predetermined range, there is a problem that the types and number of pipe clamp devices increase, and the equipment cost becomes extremely high.

In the first and second pipe clamp devices of the former publication, the distance from the pipe holding part of the pair of jaw members to the clamp body is not configured to be variable, so the range of variation in the diameter of the pipe to be clamped cannot be changed. Also, the total width of the pipe clamp device increases in proportion to the maximum diameter of the pipe to be clamped, and the rack and pinion mechanism and sliding guide part cannot be manufactured with high precision. The manufacturing cost of the device is high due to the use of fixed structural parts, and the concave shape of the pipe gripping part of the jaw member has a fixed angle, so for cylindrical pipes, it is necessary to grip and hold the pipe with four-point support.
However, if there is a buoyancy material or control pipe on the outside of the pipe such as a riser pipe, and the comprehensive line of the pipe cross section including these accessories is not circular, it may be difficult to grasp and hold the pipe.
There are problems such as instability.

In the clamp device of the latter publication,
It was originally devised for the purpose of being attached to the tip of a hoisting boom installed on a civil engineering construction work vehicle to carry lumber, etc., in a pinched manner. 1 book
It is intended to be picked up and transported in bundles, and is designed to securely grasp and hold pipes of different types from 2" to 40" one by one, and to be able to stand vertically. It is not something that is taken into account.

In other words, with the mechanism of this device, the minimum pipe diameter that can be reliably grasped and held using both the base side claw member and the tip side claw member is limited to approximately the distance between the bases of the base side claw members. If the pipe is smaller than this, 2 at the curved part of the base claw member.
Needless to say, the pipe is only supported at a point, making grasping and holding the pipe uncertain and unstable, and the claw member on the tip side is not useful. Also, at this time,
If the pipe is supported only by the claw member on the tip side, the pipe may not touch the claw member on the base side, and the grip on the pipe may become loose, making it impossible to stand the pipe vertically. be.

Furthermore, in addition to the fact that the length of the proximal claw member and the curvature of the curved part are constant, the distal claw member may not be useful at all depending on the diameter of the pipe, so grasping and holding pipes of various diameters is possible. The number of points varies from 2 to 5 points depending on the diameter of the pipe, and there is a problem in that it is difficult to grasp and hold the pipe in a reliable and stable manner.

(Means for Solving the Problems) A pipe clamp device according to the present invention is a pipe clamp device that clamps pipes of various diameters, and has a pair of left and right swingers on both left and right sides of the clamp body that are approximately the same height as the clamp body. A movable bracket member is provided, and the upper end portions of these swing bracket members are connected to the upper end portion of the clamp body at both left and right ends thereof so as to be freely rotatable about an axis in the front and back directions, and the upper end portions of these swing bracket members are connected to the upper end portion of the clamp body so as to be rotatable about an axis in the longitudinal direction. A sliding member that can extend downward from the lower end of the swing bracket member is attached to each guide part so that it can be sliced freely in the length direction of the swing bracket member. A pair of left and right clamp members which are opposed to each other and which hold both left and right sides of the lower part of the pipe are connected to the lower end of the sliding member so as to be rotatable about the longitudinal axis, respectively,
A contact part for receiving the upper end of the pipe is provided at the lower end of the clamp body, and a lifting hydraulic cylinder is provided to drive each sliding member up and down relative to the swinging bracket member, and each clamp member is connected to the sliding member. A hydraulic cylinder for clamping is provided which swings relative to the sliding member with the part as a rotation center, and a hydraulic cylinder for opening and closing is provided to drive a pair of left and right swinging bracket members to open and close in the left-right direction relative to the clamp body. It is something.

(Function) In the pipe clamp device according to the present invention,
Basically, the upper end of the pipe is received by the abutting part at the lower end of the clamp body, and the left and right sides of the lower part of the pipe are held down by a pair of left and right clamp members, thereby clamping three places on the outer circumferential surface of the pipe. Become.

For small diameter pipes, the opening degree of the left and right swinging bracket members is set small via the opening/closing hydraulic cylinder, and the position of the left and right sliding members is set high via the lifting hydraulic cylinder, and By setting a large amount of upward swing of the left and right clamp members via the clamp hydraulic cylinder,
Since the left and right clamp members can be brought close to the contact portion, it is possible to securely clamp a small-diameter pipe by pressing three points on the outer circumferential surface of the pipe.

For large-diameter pipes, the opening degree of the left and right swinging bracket members is set large via the opening/closing hydraulic cylinder, and the position of the left and right sliding members is set low via the lifting hydraulic cylinder. In addition, by setting the upward swing amount of the left and right clamp members to a small value via the clamp hydraulic cylinder,
Since the left and right clamp members can be moved away from the contact portion, it is possible to securely clamp a large-diameter pipe by pressing three locations on the outer circumferential surface of the pipe.

In this way, the horizontal position of the clamp member can be changed independently via the swing bracket member and the sliding member by the opening/closing hydraulic cylinder, and the swing bracket member and the slider can be moved by the lifting hydraulic cylinder. The vertical position of the clamp member can be changed independently via the riding member, and the amount of swing of the clamp member can be changed independently using the clamp hydraulic cylinder, so it is possible to reliably handle pipes of various diameters. Can be clamped stably.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

Figure 1 is a schematic overall perspective view of an oil drilling rig installed on an offshore workbench for offshore oil field drilling. A pipe rack 2 (pipe storage) is arranged in front of a drilling tower 1, and a pipe 3 (casing pipes, riser pipes, etc.) are sorted and stored by type and diameter, and the pipes 3 are supplied from the pipe rack 2 to the pipe hanger 5 of the drilling tower 1 by the pipe conveying device 4.

The pipe transport device 4 is a self-propelled pipe transport device 4 configured to reciprocate on two rails 6 laid along the pipe rack 2 between the pipe rack 2 and the drilling tower 1.

The pipe conveying device 4 includes a truck 7 that runs on the rails 6, and a swivel table 8 that is mounted on the truck 7 so as to be horizontally rotatable and is driven to rotate by a rotation drive means.
A multi-joint arm 10 whose lower end is hinged to the swivel table 8 and is driven to swing up and down by a hydraulic cylinder 9 serving as a swing drive means; A set of pipe clamp devices 20 are provided.

The multi-joint arm 10 includes a first arm member 11
, a second arm member 12 , and a third arm member 13 , the lower end of the first arm member 11 is hinged to a pair of brackets at the upper part of the swivel base 8 by a horizontal support shaft, and and the first arm member 1
Hydraulic cylinder 9 is mounted on the middle part of 1.
It is designed to be oscillatingly driven.

The lower end of the second arm member 12 is attached to the upper end of the first arm member 11 with a support shaft 12a parallel to the support shaft.
The proximal end (lower end) of the third arm member 13 is hinged to the tip (upper end) of the second arm member 12 by a support shaft parallel to the support shaft 12a. A hydraulic cylinder 18, which is attached to the upper part of the first arm member 11 and the distal end portion of the second arm member 12,
The arm member 11 and the second arm member 12 are driven to bend, extend, and swing relative to each other, and the distal end portion of the second arm member 12 and the proximal end portion of the third arm member 13 are aligned with each other on the rear side of the arm 10. The second arm member 12 and the third arm member 13 are driven to bend and extend and swing relative to each other by a mounted hydraulic cylinder 19.

With the above configuration, the multi-joint arm 10 is driven to bend and extend almost freely in a vertical plane by the hydraulic cylinders 9, 18, and 19, and the inclination of the third arm member 13 and the distance from the swivel base 8 can be freely adjusted.

Next, the pipe clamp device 20 attached to the tip of the third arm member 13 will be explained.

As shown in FIGS. 2 and 3, a pair of front and rear V-shaped support brackets 21 are fixed to the upper surface of the third arm member 13 so as to face left and right. The pivot portion 2 protrudes outward from the side surface of the third arm member 13.
1a is formed. In addition, the third arm member 1
A rectangular parallelepiped block 22 is fixed to the lower surface of the clamp 3, and the third arm member 13, the support bracket 21, and the block 22 constitute a clamp body 23.

Clamp body 2 is placed on both the left and right sides of the clamp body 23.
A swing bracket member 26 consisting of a pair of front and rear swing plates 24 and a connecting plate 25 connecting them to each other is arranged symmetrically, and the upper end of each swing bracket member 26 is The swinging bracket members 26 are rotatably connected to the pivot portion 21a of the support bracket 21 by a pin 27 extending in the front-back direction. A plate-shaped sliding member 29, which is longer than the swing bracket member 26 and can extend downward from its lower end, is attached to the swing bracket member 26 so that it can be sliced freely in the longitudinal direction. Each of the guide portions 28 is formed of a rib 28a fixed to the front and rear swing plates 24 and a connecting plate 25, and the sliding member 26 is disposed in contact with the outside of the connecting plate 25. Further, a pair of front and rear guide tools 30 are fixed to the side surface of the third arm member 13 for restraining the back and forth movement of each swing bracket member 26 and guiding the swing bracket member 26 in the left-right direction.

A pair of connecting brackets 31 are provided on the outer surfaces of the lower ends of the left and right pairs of sliding members 26, respectively.
are fixed to these left and right connecting brackets 31, and a pair of left and right clamp members 32 which are opposed to each other and which hold down both left and right sides of the lower part of the pipe 3 are rotatable in the front and rear direction via pins 33. They are each connected.

A presser portion 34 for holding down the pipe 3 is formed on the upper surface of the inner half of each clamp member 32, and an arm 35 extending outward is formed on the outer half of each clamp member 32. And clamp body 2
A contact portion 36 for receiving the upper end of the pipe 3 is formed on the lower surface of the block 22 at the lower end of the pipe 3.

A lifting hydraulic cylinder 37 is provided for driving each sliding member 29 up and down relative to the swinging bracket member 26, and the upper end of the cylinder body of this lifting hydraulic cylinder 37 is connected to the pin 27 of the pivot portion 21a.
The lower end of the rod is connected to a connecting bracket 31 via a pin 38 extending forward and backward. Also, a connecting portion (pin 33) connects each clamp member 32 to the sliding member 29.
A clamping hydraulic cylinder 39 is provided that swings relative to the sliding member 29 with the rotation center at . The lower end of the rod is connected to the clamp member 3 via a front-rearward pin 41.
It is connected to the outer end of the second arm 35 via a front-rear pin 42. An opening/closing hydraulic cylinder 43A drives the left swing bracket member 26 to open and close in the left-right direction with respect to the third arm member 13, and an opening/closing hydraulic cylinder 43A drives the right swing bracket member 26 to open and close in the left-right direction with respect to the third arm member 13. An opening/closing hydraulic cylinder 43B is provided, and an opening/closing hydraulic cylinder 43B is provided.
The right end of the cylinder body of A is the third arm member 13
It is connected to a support bracket 44A protruding from the lower surface of the rod by a front-back pin, and the left end of the rod is connected to a support bracket 45A projecting from the inner surface of the left swing bracket member 26 by a front-rear pin. has been done. Further, the right end of the cylinder body of the opening/closing hydraulic cylinder 43B is connected to a support bracket 44B protruding from the lower surface of the third arm member 13 by a longitudinal pin, and the left end of the rod is connected to the right swing bracket member 26. It is connected to a support bracket 45B protruding from the inner surface of the support bracket 45B with a front-rear pin.

The operation of the pipe clamp device 20 explained above will be explained.

For small-diameter pipes 3, as shown on the right side of FIG.
3B, the opening degree of the left and right swing bracket members 26 is set small, and the lifting hydraulic cylinder 37
When the left and right sliding members 29 are raised through the clamp members 32, the left and right clamp members 32 move upward. As a result, the left and right holding parts 34 approach the contact part 36, so the left and right clamping hydraulic cylinders 39
By driving the small diameter pipe 3 in the clamping direction, the small diameter pipe 3 can be reliably and stably clamped by the contact portion 36 and the left and right holding portions 34.

For the large diameter pipe 3, as shown on the left side of FIG.
3B, the opening degree of the left and right swing bracket members 26 is set large, and the lifting hydraulic cylinder 37
When the left and right sliding members 29 are greatly lowered through 3 can be reliably and stably clamped by the contact part 36 and the left and right holding parts 34.

(Effects of the invention) As described above, according to the pipe clamp device according to the invention, a pair of left and right swinging bracket members are provided, and a sliding member is attached to each swinging bracket member in the longitudinal direction through the guide portion. A clamp member is swingably provided on each sliding member, and a hydraulic cylinder that drives a pair of left and right swinging bracket members to open and close, respectively.A hydraulic cylinder that drives each sliding member up and down, and each clamp member. A hydraulic cylinder is provided to swing and drive the pair of left and right clamp members, so that the left and right positions, up and down positions, and swing positions of the pair of left and right clamp members can be independently changed with respect to the contact portion at the lower end of the clamp body. With this structure, it is possible to reliably and stably grasp and hold pipes ranging from extremely small diameter pipes to large diameter pipes with one type of pipe clamp device. Furthermore, since structural parts having a complicated structure and highly precisely machined are not required, it can be manufactured at a relatively low cost.

In addition, the pipe can be gripped and held at three points, which are always divided into three equal parts on the circumference of the pipe by the abutting part at the lower end of the clamp body and both clamp members, regardless of the diameter of the pipe, so the pipe can be stabilized and held. Not only can the pipe be gripped and held securely, but even a pipe whose cross section including the appendages on the outer periphery of the pipe is not circular can be held stably and reliably with three-point support.

In addition, one type of pipe clamp device can stably and reliably hold pipes ranging from extremely small diameter pipes to large diameter pipes, and when grasping a pipe, the top surface of the pipe should be in contact with the abutting part of the lower end of the clamp body. This makes it easy to position the clamp body when grasping a pipe, and it has many advantages, such as the ability to easily automate pipe grasping, holding, and conveyance.

[Brief explanation of the drawing]

Among the drawings, FIGS. 1 to 3 are related to an embodiment of the present invention, in which FIG. 1 is a schematic overall perspective view of an oil drilling rig, FIG. 2 is a perspective view of a pipe clamp device, and FIG. 3 is a perspective view of a pipe. A front view of the clamp device, FIGS. 4 to 6 are related to a conventional example, FIG. 4 is a schematic overall perspective view of an oil drilling rig, FIG. 5 is a side view of a hook-type bridge crane, and FIG. 6 is a clamp It is a front view of a type bridge crane. 3... Pipe, 13... Third arm member, 20
... Pipe clamp device, 21 ... Support bracket, 22 ... Block, 23 ... Clamp body,
26... Swing bracket member, 28... Guide section,
29... Sliding member, 32... Clamping member, 36... Contact portion, 37... Hydraulic cylinder for lifting, 39... Hydraulic cylinder for clamping, 43
A, 43B...Hydraulic cylinder for opening and closing.

Claims (1)

[Scope of Claim for Utility Model Registration] In a pipe clamp device for clamping pipes of various diameters, a pair of right and left swinging bracket members are provided on both left and right sides of the clamp body and are approximately the same height as the clamp body, and these swing bracket members The upper end portions are connected to both left and right end portions of the upper end portion of the clamp body so as to be rotatable about an axis in the front and back direction, and guide portions are formed along the length direction of these swing bracket members, respectively. A sliding member that can extend downward from the lower end of the swinging bracket member is attached to the guide portion so as to be slidable in the length direction of the swinging bracket member, and a pair of left and right sliding members are attached to the lower end of the pair of left and right sliding members. Clamp members that press the left and right sides of the lower part of the pipe are connected to each other so as to be rotatable about the longitudinal axis, and the lower end of the clamp body has an abutment part that receives the upper end of the pipe. A lifting hydraulic cylinder is provided to drive each sliding member up and down with respect to the swinging bracket member, and each clamp member is driven to swing relative to the sliding member around the connecting portion to the sliding member. A hydraulic cylinder for clamping is installed,
A pipe clamp device comprising an opening/closing hydraulic cylinder that drives a pair of left and right swinging bracket members to open and close in the left and right directions with respect to a clamp body.