JPS5917132A - Composite testing device for steel pipe - Google Patents

Abstract

PURPOSE:To obtain the highly reliable results of tests by mounting a high pressure vessel device on a movable base and providing the same movably into and out from the testing region of a device for applying tension, compressive force and torsional force. CONSTITUTION:A frame body 2 forming the outside part of a device 1 for applying tension, compression and torsional force is built to a rectangular parallele piped by means of four side frames 2a, a stationary head 2b and a cylinder head 2c. A chuck mechanism for applying torsional force is mounted to the head 2b, and a root part 11 and a chuck part 12 are connected by means of a universal joint. The shaft 13 that supports the part 11 is supported to the head 2b by means of a thrust bearing 14. An auxiliary base 7 is attached on the outside of the head 2b and a rotating mechanism 8 provided with a means for detecting torsional torque is installed thereto and is connected to the shaft 13. The mechanism 10 grips the one end of a test pipe P set in a high pressure vessel throughout the inside thereof and applies torsional force on the pipe P when said mechanism is rotated by the mechanism 8.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a composite testing device for evaluating the durability of steel pipes used in environments where complex and severe external forces act, such as steel pipes for oil wells.

Steel pipes for oil wells are buried vertically in oil extraction wells that reach several thousand meters underground, but they are subjected to enormous tensile stress during the burying process and while they are used for many months after being buried. Stress, compressive stress, torsional stress, and bending stress act in a superimposed manner. Steel pipes for oil wells must be able to withstand such external forces. The present invention aims to provide a composite testing device that can evaluate the durability required for steel pipes under conditions as close as possible to the actual field conditions.

Conventional composite test equipment of this type includes
Some of these are published in Publication No. 8, Japanese Patent Application Laid-open No. 18741/1983, and the like. One of these test devices consists of a pressure vessel main body in which a steel pipe to be tested is set in a penetrating manner, and two vessel caps that pass through and hold both ends of the steel pipe and are watertightly sealed at both ends of the pressure vessel main body. There was a problem with the means. The connecting means is formed into a hollow flange having an outer circumferential surface with a tapered cross section where the abutting portions of the vessel body and the vessel cap meet each other, and a tapered inner surface that fits the tapered outer circumference of the flange. A tool is provided for tightening the two halves having circumferential surfaces, and the tool is clamped to the tapered outer peripheral surface of the flange No. 111 by an appropriate means such as a hydraulic cylinder. As such connection means are repeatedly tested, the tapered surfaces of both the flanges and the fasteners wear out, creating a step, resulting in an incomplete watertight seal. This could lead to unreliable test results. The present invention has been made with the aim of solving these conventional problems.

The present invention will be explained below based on embodiments shown in the drawings.

FIG. 1 is a plan view of the entire steel pipe composite testing device (hereinafter referred to as the present testing device) according to the present invention, and shows the second (third)
) is a sectional view taken along line 1-1 in FIG.

The main components of this test equipment can be roughly divided into a leg device 1 with tension/compression/torsion force, a high-pressure vessel device 60, and a leg device 90 with bending force.

A frame body forming the outer shell of the leg device 1, which includes four parallel side frames 2a, and the side frames 2.
A fixed head 2b that connects one end of the side frame 2a and a cylinder head 2c that connects the other end of the side frame 2a are framed in a rectangular parallelepiped shape, and a plurality of beams 2d are installed in the intermediate portion VcVi of the side frame 2a. A torsional force applying chuck mechanism 10 is attached to the fixed head 2b. This torsional force adding chuck mechanism
o, the base 11 and the chuck capital 12 are connected by a universal joint structure, and the shaft 13 supporting the base 11 is rotatably supported via the fixed head 2bK thrust bearing 14. An auxiliary stand 7 is attached to the outside of the fixed head 2b, and a rotation mechanism 8 equipped with a torsion torque detection means (not shown) connected to a drive motor (not shown) is installed on the auxiliary stand 7. Torsional force adding chuck mechanism lOO
It is connected to the shaft 13. Torsional force adding chuck machine 4R1
1 (l is VC shell 1lIJ in direct pressure vessel device u60
L is for gripping one end of the steel pipe P to be tested that has been completely set, and in the case where the rotational force is transmitted through the rotation mechanism 8, this is for applying a twisting force to the steel pipe P to be tested. I can do it. On the other hand, the cylinder head 2clC is installed in the longitudinal direction VC of the cylinder 3 or the frame body 2 by hydraulic drive,
The tip of the piston rod 4 is connected to the tension/compression force applying chuck mechanism 200 and the shaft 23i'. If possible, it is rotatably supported by the loss head 5 via a thrust bearing 9.The other parts have almost the same structure as the torsional force applying chuck mechanism 10.Tension/compressive force applying chuck mechanism 20 The chuck capital 22iIJ piece is opposed to the chuck capital 12IifJ surface of the torsional force applying chuck mechanism 10, sandwiching the test area 6 in the frame main body 2.
When the piston rod 4 moves back and forth by driving the cylinder 3, compressive force and tensile force can be applied to the steel pipe PK to be tested held by the two opposing chuck parts 12 and 22. When applying a torsional force to the YA copper QT p to be tested, K must be prevented from rotating the tension-compression force applying chuck mechanism 20 fXl8. Therefore, we use a tension/compression chuck machine! lJ! 20 base 2N
Brackets 25 are provided on both sides of Qj, and positive pins 26 are attached to both ends of the brackets 25 to be inserted into holes drilled in the crosshead 5. If the stop pin 26 is operated by a solenoid (not shown) or the like, the tension/compression force applying chuck mechanism 20 can be made rotatable or prevented from rotating depending on the need. Note that the stopper K that prevents the rotation of the tension/compression force applying chuck mechanism 20 may have a structure in which it is fixed to the crosshead 5vc. In addition'! In addition, the torsional torque described in 11J can be detected by using a tensile or
It may be provided on the 2° side of the compressive force applying chuck mechanism.

For example, this is a bracket (not shown) in which a marking pin 26 is fixed and suspended downwardly or upwardly relative to the bracket 25, and its tip is projected from the front surface of the crosshead 5.
A detector such as a load cell is interposed between the bracket and the main bottle 26, and the torsional torque is detected by the load cell. Structure of the chuck part 12.22 of the force-applying chuck mechanism 20 and this chuck part 1-2.2
The gripping of the end portion of the steel pipe P to be tested by No. 2 will be explained in more detail as follows. In addition, the chuck part 12.2
Since both structures of No. 2 are rotary, the chuck portion 12 of the torsional force applying chuck mechanism 10 will be mainly explained below with reference to FIGS. 3 to 7. FIG. 3 shows the torsion applying chuck. FIG. 3 is a longitudinal cross-sectional view of the mechanism 10. base 1
The two prongs 15 of 1 and the two prongs 16 of the chuck portion 12 intersect and fit together, forming a universal joint structure in which they are connected to each other by a cross piece 17. Inside the case 30 of the chuck part 12, a plurality of claws 31 (six in this embodiment) are arranged radially, and these claws slide together in the radial direction to attach the end of the steel pipe P to be tested by welding. One end fitting 4 that can grip and release the fixed end fitting 44
4 is as shown in FIG. 4 when viewed from perspective. That is, it has a joint portion 44a to which the steel pipe to be tested PVc is fixed, followed by a neck portion 44t+ having a hexagonal cross section and a head portion 44c at the tip.

The plurality of claws 31 can grip the tip fitting 44 by bringing their tip surfaces into contact with the hexagonal surfaces of the neck cap 44b, respectively. In this gripping state, torsional force, tensile force, compressive force, and bending force of ``i!'' can be individually applied to the steel pipe P under test, as well as necessary for conducting the test. Select the additional force accordingly,
It is possible to double or triple overlap. Fifth
The figure clearly shows the state in which the tip fitting 44 has been released and released. Chuck part 12#-1: Due to its weight, it will sag slightly, but the bifurcated edge of the base 11 will serve as a stopper and will not sag any further, so next time, replace the tip fitting 44. It does not cause any trouble when grasping. In addition, 18 is a notch with Vce so that the PK curve of the steel pipe to be tested can be sufficiently rotated upward by chuck i12'i when force is applied. The gripping means of the claws 31 in the case 30 of the chuck portion 12 is an interlocking chuck system. The main parts of the chuck portion 12 are shown in enlarged scale as shown in FIGS. 6 and 7. 6 is a sectional view taken along the line Tl-1 in FIG. 7, and FIG. 7 is a right side view of FIG. 6 (a front view of the cover 41 of the case 30). According to FIG. 6, the case 3 of the chuck part 12
0 internal structure can be known. 33 is a screw shaft rotatably supported by upper and lower support members 32. The screw shaft 33 has a female thread engraved on its outer periphery to fit the T screw thread.
are fitted. Slide collar 34Kij: A protrusion 35 is pushed out, and this protrusion 35 is fitted into a hole drilled in the claw 31 and engaged. A bevel gear 36 is spline-coupled to the shaft end of the screw shaft 33 near the outside of the chuck section 12, and an interlocking fitting 37 is coupled to the outer circumferential surface of the chuck section 12. This interlocking metal fitting 37 has snow (
Slide collar 34 and claw 31t
-t Slides in the radial direction of the chuck portion 12. The driving mechanism of the pawls 31 described in ltl is the same for all the pawls 31. Reference numeral 39 denotes a ring-shaped interlocking ring that can rotate and slide against the surface of the face filler 38. The interlocking ring 39 is provided with rack teeth 40 that mesh with the teeth of the bevel gear 36.
meshes with bevel gears 36 associated with all pawls 31, respectively. Therefore, by rotating one interlocking fitting 37, all the claws 31 can be simultaneously driven in the same direction, and the tip fitting 4 fixed to the end π of the pot under test P can be moved simultaneously.
4 can be gripped and released.

In addition, O? Reference numeral 41 is a face cover that covers the chuck portion, 42 is a bolt for fixing the face cover 41, and 43 is a claw lead that prevents the claw 31 from coming off. 7th
As is clear from the figure, the neck portion 4 of the tip fitting 44
4b An object with a large outer diameter is gripped by all six claws 31, and an object with a small outer diameter is gripped by all six claws 31.
: This can be done using the three claws 31. However, when holding a small-diameter gear, the meshing relationship with the rack teeth 40 of the interlocking ring 39 is released for the bevel gear 36 associated with the pawl 31 that is not used.

The gripping means for the end fitting 44 of the steel pipe to be tested P@↑6- of the chuck mechanism may be the same as the embodiment of A10. An example is the fv, LI kimono shown in FIGS. 8 to 11. FIG. 8 is a longitudinal sectional view of the chuck mechanism. As can be seen from this figure, rnlin VC of 51 sides.

Two gripping members 52, 52"k are provided which slide downward by 2" with respect to the center thereof, and the gripping members 52.52"
The end metal fitting 57 is gripped via the vc fixed adapters 53, 53'. 54, 54' are keys for fixing the adapters 53, 53' to the gripping members 52, 52'. Although the mechanism for driving the gripping members 52 and 52' is not shown, a cylinder attached to the face plate 51 may be used. gripping members 52, 52'
The sliding can be done along the dovetail groove (N not shown) VC formed in the face plate 51. No. 9N is a sectional view taken along the line ■-■ in FIG.

The shape of the tip end fitting 57 in this case is as shown in FIG. 10 when viewed from perspective. Joint portion 57a, neck portion 57b, and head portion 57
c is similar to that shown in FIG. 4, but the neck portion 57b has a circular cross section and the head portion 57c
has a notch plane 57di parallel to the longitudinal direction.

Figure 11 shows an adapter divided into upper and lower halves 53゜53'
It is a perspective view showing the shape of one of them.

The inner surface of the adapter 53 is formed to match the shape of the neck portion 57b and the head 57c of the tip fitting 57, and the outer surface is formed to match the inner shape of the gripping member 52, and the fixing key 54 is A keyway 56 for fitting is provided. With this gripping means, it is possible to apply torsional force, tensile force, compressive force, and bending force individually to the steel pipe pi't' under test, or to superimpose two or three of these forces. Possible 0 Next, the high pressure vessel device 60 will be explained.

12 is a plan view of the high-pressure vessel device 60, FIG. 13 is a sectional view taken along the line IV-fV in FIG. 12, and FIG. 14 is a right side view of FIG. 12. As can be seen from these marks, the high-pressure vessel device 60 mainly consists of a vessel main body 61 that penetrates the steel pipe P to be tested, and both ends of the steel pipe P to be tested.
... 2 that is held and watertightly sealed at both ends of the vessel body 61
Two cap bodies 70. Four wooden tie rods 67 (67a) for screwing and guiding the two cap bodies 70 to the vessel body 611'U watertightly.

67b) and a drive transmission plate structure that rotates and drives the four tie rods 67, and the vessel main body 61, the tie rod 67, and the drive 1I (I) transmission mechanism transfer II stand 79VC are installed. The cap body 70 can be screwed onto or unscrewed from the tie rod 07.

The vessel main body 61 is a thick cylindrical body having a through hole 62 in the axial direction of the center portion. The inner diameter of the through hole 62 is larger than the outer diameter of the steel pipe P to be tested, and external pressure is applied to the steel pipe PK to be tested installed inside the shell hole 62. An inflow hole 63 for supplying a high-pressure liquid fluid with external pressure added is provided in the first direction Ifft of the vessel body 61, and an air vent hole 64 with a stop valve is provided in the upper direction of the vessel. Four bearing brackets 05 are disposed protruding from the outer periphery JJπ of the longitudinal center portion of the vessel body 61. The upper side edge π of the vessel main body 61 further includes saddles 66 for gear box supports installed at both ends of the vessel main body 61. A gear box 86b is installed on each of the saddles 66.A gear box 86a is also installed at a position perpendicular to the top of the moving table 79 from the center of each gear box 86b. The bearing hole of the bearing bracket 65 and the gear boxes 86b, 86'b are arranged in a straight line fq parallel to the longitudinal direction π of the vessel body 61.This linear arrangement state is similar to that of other bearing brackets. The same applies to the single bearing hole drilled in the shaft and the gear box.

The tie rods 67 include two lower tie rods 67a and two upper tie rods (i7b), each of which has a center portion rotatably supported in a bearing hole of each bearing bracket 65, and each linearly arranged gear. Boxes 86a and 86a, 8
6b and 86bt shell 1111 are extended. Gear pock 86a, 86aJ and ff86b are provided on both sides of each tie rod 67a, 67b.

A screw is cut through the 86bis from the protruding part to both ends. One of the screws on both sides is right-handed,
It is used as a left-handed screw, and all screws have the same pitch.

Each of the tie rods 67a, 67b has a non-threaded portion 68 at its tip end having the same diameter as the root diameter of the thread. In this embodiment, the threaded length L on the left side is longer than the threaded length L on the right side. is equal to or greater than t. That is, L≧l+t. Each tie rod 67a, 67
bVc also has a bevel gear fitted in the facing portion of each gear box 86a, )t6b.

Two cap bodies (70 pieces), 1) are also steel pipes to be tested p'2
The small diameter part 72 that penetrates and holds and the large diameter that contacts and closes the end face of the vessel body 61? 41973, large diameter part 73
and the small diameter portion 72 are integrally formed.

The outer periphery of the large diameter portion 73 has four wooden tie rods 67 (67a
.

A screw receiving bracket 74 is provided protrudingly provided with a screw hole into which the screw 67b) is screwed. Each of the screw receiving brackets 74 is provided with a lip 75 that connects to the small diameter portion 72 in order to compensate for its strength. Inside the large diameter portion 730, there is a packing unit mounting chamber 76 that is thicker than the insertion hole 78 of the small diameter portion 72 (and has an inner diameter approximately the same as the through 31D hole 62 of the vessel main body 61. A packing unit 77 is installed to ensure watertightness.
A portion of the packing unit 77 protrudes toward the end surface of the vessel body 61. The steel pipe P to be tested is held through the packing unit 77 and the insertion hole 76 of the small diameter portion 72. Therefore, the through hole 62 of the vessel body 61 and the cap body 70
The insertion hole 78 and the continuous mounting chamber 76 are concentric.
It is designed to be placed on a straight line.

In FIG. 13, a motor 81 with a shear reducer 82 is placed on a movable table 79 directly below the center of the vessel body 61, and is coaxial with the motor 81. The main gear box 85 is installed on top of the 14th gear box.
Kb, 83 Ire:, Saddle 66 for receiving the box inside and above the gear box 86a on the transfer 1110 machine 79
This is an interlocking shaft that connects the inside of the upper gear box 86'b. The inside of the main gear box 85 and the inside of the gear box 86a are connected by a distribution drive shaft 84, and the main gear box 85 and the other gear boxes 86a and 86b both have built-in gear devices for drive transmission. VC is applied so that the four tie rods 67a and 67b rotate synchronously. The drive transmission mechanism is schematically developed and illustrated in FIG. 15. In the figure, 85 is a main gearbox, 86a is a gearbox installed on the three transfer units 79, and 86b is a gearbox installed on the saddle 66. Four tie rods (i7a, 67bi) are each rotatably supported at approximately the center by a bearing bracket 65, and are arranged in a straight line, respectively, and connect to gear boxes 86a and 86b.
'iiq, a threaded portion T portion vcll-1: the screw receiving bracket 74 of the cap body 70 is screwed together.

The driving force of the motor 81 is transmitted to the left and right lower tie rods 67aVc by the distribution drive shaft 84, and is transmitted from the left and right lower tie rods 67a to the upper tie rod 67 via the interlocking shaft 83.
bK is transmitted, and the four tie rods 67a and 67b rotate synchronously. And those tie rods 67a, 6
When the cap body 7b rotates forward, the cap body 70 moves in a direction to close the vessel body 61, and when it rotates in a reverse direction, it moves in a direction to open the vessel body 61.

A separate bending force applying device 90 is shown in FIG. That is, two push-up cylinders 92 are erected on the moving table 91, and a rotatable roller 94 is provided at the head of the piston rod 93 of each push-up cylinder 92. The separate bending force applying device 90 includes the torsional force applying chuck mechanism 1
0 and the tensile/compressive force applying chuck mechanism 20 grips the steel to be tested %iP, the center part of the steel pipe to be tested P is positioned between the two rollers 94 tEfK, and the push-up cylinder By driving the rollers 92 and pushing the rollers 94 upward, the receiver applies a bending force to the steel pipe P to be tested. At this time, the central part of the steel pipe P to be tested curves upward, and the chuck parts 12 of the torsional force applying chuck mechanism 10 and the tensile force applying chuck mechanism 20 are rotated slightly upward.
) In order to provide room for upward rotation of the zero chuck portion 12, it is preferable to provide an inclined friend notch 18 at the upper end of the forked piece 15. In addition, the cylinder 3 and rotation mechanism 8 of the separate tension-compression/torsion force device 1#1, and the high-pressure vessel 1t
ff 60 (7J vessel main body 61. The push-up cylinder 92 of the separate bending force applying device 90 is provided with a detection end (not shown) which applies the force t to the steel pipe under test pr, respectively), Those detected value signals are sent to the control room (
(not shown).

The above is a separate explanation of the main components of "Nonexplosion", namely the tension/compression/twisting force applying device 1, the high pressure vessel system@60, and the bending force applying device 90r, but the arrangement of all of these is explained separately. The relationship and the arrangement of the equipment attached to these are as shown in Figure 1.

That is, the tensile/compressive/twisting force applying device 1, which is the central feature of this testing device, is installed, and the movable table 7 intersects at right angles to the longitudinal direction of the separate tensile/compressive fist twisting force applying device 1.
9. Rails 95 for loading and unloading are laid in the test area 6 minutes apart.
The high-pressure vessel device 60 is placed in a testing state, and the high-pressure vessel device 60 can be taken in and out of the test area 6 from a standby position indicated by a broken line at one end of the loading/unloading rail 95. However, at the other end of the loading/unloading rail 95, a separate bending force applying device 90 is placed in a standby state, and this bending force applying device 90 can also be moved in and out of the test area 6. A preparation rail 96 extending parallel to the longitudinal direction of the tension/compression/torsion force adding device w1 is laid from the standby position of the high-pressure vessel device @60 at one end of the preparation rail 95, and an insertion stand 97 is installed at the end of the preparation rail 96. has been prepared,
This insertion table 97Vi can be moved on the preparation rail 96. Note that the steel pipe y to be tested is indicated by a broken line on the preparation rail 96 and is prepared to be subjected to a displacement test.

Next, the implementation of the test using this test device will be explained.

First, we will discuss the case in which tension, compression, and torsion tests are performed on the steel pipe PK to be tested while applying external pressure around it. The high pressure vessel device 60 is placed in the preparation position shown by the broken line in FIG. 1 in preparation for the test. It has been completely unscrewed from the tie rod 67' and placed on the insertion table 97 and is in good condition.The other cap body 70'' is still attached to the left tie rod 67'' and in a fixed state. The position corresponds to the threaded length l of the right tie rod 67', and is NG away from the end surface of the vessel body 61'. The steel pipe y to be tested is suspended by a hoist (not shown), etc., and then the cap body 70' is placed on it, the box insertion table 97 is moved to the left, and the pipe end is inserted into the packing unit of the cap body 70'. After the insertion, the insertion table 97 is still moved to the left. By doing so, the free end of the test object 1yf11' is inserted through the through hole of the vessel body 61', and then the left tie rod 67''
The cap body 70'' is inserted into the sealing unit of the cap body 70'' which is in the engagement state i1 at the left end of the frame.Subsequently, the insertion table 97 is moved to the left, and the cap body 70' placed on the table is inserted into the sealing unit of the cap body 70'' placed on the table. It locks on the right end unthreaded part.Therefore,
The steel pipe y to be tested is in a good condition with its central part inside the vessel body 61' and both ends inserted and held in the two cap bodies 70' and 70''.
The direction V in which the two cap bodies 70' and 70'' are threaded
C4 tie rods 67', 67"i rotate (drive the motor. Then the two cap bodies 70'
, 70'' are synchronously narrowing the distance between them and both ends of the vessel body 61' at a cooling speed, and the protruding portion of the packing unit is pushed into the through-hole opening of the vessel body 61', and eventually the two cap bodies 70', 70'' completely closes both end surfaces of the vessel body 61'. At this time, the left end of the installed good steel pipe y to be tested is connected to the left cap body 70.
It is desirable to make the adjustment so that the insertion table 97 is slightly exposed. For this adjustment, a known chuck (not shown) is provided on the insertion table 97, and the end of the steel pipe to be tested y is gripped and the insertion table 97 is exposed. 97 to the left or right as appropriate.In this way, the work of setting the steel pipe y to be tested is completed.

The vessel device 1-"t with the tube to be tested mounted is moved on the loading/unloading rail 95, moved into the test area 6, and spaced by 11°qtπ as shown by the solid line. Next, the crosshead 5 is moved to the left. Move to the 1st side (drive the cylinder for 3 minutes, tension/pressure; 20 pieces of force-applying chuck mechanism are fixed to the right end of the steel pipe P to be tested, grip the foot end fitting, and the steel to be tested 'F(' When the left end of P hits the surface of the torsional force adding chuck mechanism 10 in the open state, the crosshead moves to the left, and then twists.
When the chuck mechanism 1 (1'l) is used to grip the tip fitting fixed to the left end of the steel pipe P to be tested, the test preparation is completely completed. After that, external pressure is applied to the same curve of the steel pipe P to be tested. In order to do this, while discharging air from the air vent hole 04, liquid b' To analyze the PIC tensile force of the steel pipe under test by month, move the crosshead 5 to the right (press the cylinder 3 to the drive 11), then increase the PVc pressure of the copper pipe under test, 1
To apply the force, move the crosshead 5 all the way to the left (drive the cylinder 3 and force it to ρ).・It is best to rotate it in either direction.

Next, bending force? When conducting a test by applying bending force, the receiver of the bending force applying device 90 in the standby position is placed horizontally on the roller 94-H, and the high-pressure vessel device 60Iri in the test area 6 is placed in its standby position. In place of this, the force-applying shield 90 is transferred into the test area 6. After that, the force-applying chuck is fixed to both ends of the 1st class test steel pipe and twisting the end fitting as described in ITJ. What is necessary is to grip it with the mechanism 1o and the tension/compression force adding chuck mechanism 20 and drive the push-up cylinder 92. At this time, it goes without saying that the torsional force can also be differentiated by month.

Since this test equipment line is as described above, in the test VC for evaluating the durability of oil-exposed steel and bamboo, it is possible to carry out the test by applying a compound external force similar to the conditions used in the field. Therefore, extremely reliable test results 1 can be obtained. The means for closing the vessel with the cap body, which has a large diameter, is constructed using four tie rods, so there is a risk that the watertight sealing function will be diminished due to wear.
Therefore, even if many tests are repeated over a long period of time, there will be no change in its function, and from this point of view, it is possible to conduct all tests with high -N reliability.

[Brief explanation of drawings]

Figure 1 is a plan view showing the main test equipment and the entire equipment connected to it; Figure 2 is a cross-sectional view of Figure 1;
Figure 3 is a longitudinal sectional view showing the chuck mechanism gripping the end fitting fixed to the end of the steel pipe under test, and Figure 4 is a perspective view of the end fitting fixed to the end of the steel pipe to be tested. Figure, S
Figure 5 is a vertical sectional view showing the chuck mechanism in Figure 3 releasing its grip on the tip metal fitting, and Figure 6 is a cross-sectional view of Figure 7 t/c showing the structure inside the case of the chuck mechanism.
Line sectional view, Figure 7 is the right side of Figure 6 (front of the lid)
8 to 11 show other embodiments of the chuck mechanism, and FIG. 8 is a longitudinal sectional view showing the chuck mechanism fixed to the end fJ of the steel pipe to be tested and gripping the companion end fitting. , FIG. 9 is a sectional view taken along line 10-III in FIG.
Figure 11 is a perspective view showing another embodiment of the tip fitting; Figure 11 is a perspective view of the adapter fitted into the chuck mechanism shown in Figures 8 and 9; Figure @12 is a plan view of the vessel device;
Figure 3 is a sectional view taken along the line IV-fV in Figure 12, Figure 14 is a right side view (front view of the cap body) of Figure 13, and Figure 15 is a schematic expanded view of the drive mechanism of the vessel device. The figure shown in FIG. 16 is a front blade in a partial cross section showing a state where a bending force is being applied by the bending force applying device to the steel to be tested 9 held by the chuck mechanism. 1... Tension/compression/torsion force applying device 2... Frame body 3... Cylinder 8... Rotation mechanism 10.
... Torsional force adding chuck mechanism 20... Tension/compression force adding chuck mechanism 60... High pressure vessel device 61
...Heracel main body 67.67a, 67b...Tie rod 70...Cap body 90...Bending force addition equipment w
92... Push-up cylinder 95... Rail for loading/unloading 96... Preparation rail 97... Insertion clock Applicant Sumitomo Kinshiku Industries Co., Ltd. Agent Patent attorney Toshihiko Uchida

Claims (1)

[Claims] 1. A rectangular framework structure is provided with an fxT frame, and a fixed head constituting one end of the frame main body has a shaft connected to a rotating mechanism and grips one end of the steel pipe to be tested. A torsional force applying chuck mechanism is provided as shown in FIG. A tensile/compressive bone torsion force applying device y supported slidably in the longitudinal direction of the frame body and provided with a tensile/compressive force applying chuck mechanism so as to grip the other end of the steel pipe to be tested; A vessel body is provided, which is disposed on the outer periphery of the vessel body in the axial direction thereof, is connected to a rotation drive mechanism so as to be able to rotate synchronously, and has left and right reverse screws screwed near both ends. A wooden tie rod is provided, and is screwed onto the tie rod to penetrate and hold both ends of the set steel pipe to be tested and to be watertightly sealed at both ends of the vessel body (the two cap bodies A high-pressure container is installed on a movable platform to be taken in and out.
A composite testing device for steel pipes characterized by: 2. A frame body having a rectangular framework structure is provided, and a fixed head constituting one end of the frame body is connected to a shaft or rotating mechanism, and is twisted so as to grip one end of the steel pipe to be tested. A chuck mechanism is provided, which is connected to a cylinder installed with a cylinder head VC constituting fIJ of the frame body, and is arranged in the longitudinal direction of the frame body, facing the U distribution force applying chuck mechanism across an intermediate test area. A tensile/compressive/torsional force applying device, which is slidably supported by the steel pipe under test and grips the other end of the steel pipe under test (a tensile/compressive force applying chuck mechanism is installed), and a Vessel main body that penetrates the steel pipe under test. Four tie rods are provided on the same outer part of the vessel main body, are arranged in the axial direction thereof, are connected to the rotation drive mechanism so as to be rotatable at the same time, and have left and right opposite threads on both ends. is provided, and penetrates and holds both ends of the steel pipe to be tested set with FirJ mark.
2. A high-pressure vessel device comprising two cap bodies (vIJ) screwed onto the four tie rods to be water-tightly sealed at both ends of the vessel body, the torsional force applying chuck mechanism, and the tension/compression force applying chuck mechanism. Chuck machine @ [A push-up cylinder that applies a pushing force in a direction perpendicular to the gripped steel pipe under test's axis? 1. A composite testing device for steel pipes, characterized in that the device is mounted on separate movable tables so as to be moved in and out of the testing area of the bending device that generates 1kW.