JPS6012168B2 - Coupling mounting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the invention of a coupling installation device, which enables continuous and smooth installation of a coupling (including a threaded protector) to a pipe body of a threaded pipe and application of grease to the threaded portion. The objective is to perform the work accurately and relieve heavy manual labor, thereby achieving appropriate labor savings in the work.

In threaded pipes such as oil country tubular goods and gas pipes, a coupling (threaded protector) is attached to the threaded portion of the pipe body.

However, this work is carried out in two steps: after threading the pipe, applying grease to the mounting surface, and then screwing the coupling onto the threaded part of the pipe. Two workers were stationed at the rear of the vehicle, and these workers manually performed the two tasks of applying grease and installing the coupling.

As a result, workability is poor and many workers are required.
Moreover, the important thing about the coupling is the considerable weight (approximately 244.50
It was extremely hard work due to the fact that thread cutting efficiency was improved (1 thread per 4 pieces) and threads could be machined one after another in a short period of time. Of course, for this reason several methods have been used in the industry for mounting and greasing couplings. In other words, for the former method, there are two methods: a collet chuck method that grips the coupling and rotates it to thread it onto the tube held in the tube body chuck, or a method that attaches the coupling between parallel turning rolls and rotates the coupling. On the other hand, there is a method in which the tube is screwed forward and screwed together, and a method in which a evening roll is used in conjunction with a belt that moves up and down in a cylinder.For the latter, a brush coated with grease is applied to the threaded part while rotating the tube. There are ways to do this. However, in these methods, coupling installation and grease application work are performed separately, which not only makes it impossible to improve efficiency as a whole, but also prevents bending of the pipe. Since automatic centering is not possible and poor alignment occurs during installation, a considerable number of workers are required for adjustment and correction, making it impossible to achieve complete labor savings. Since this is done manually by touching the brush while turning the pipe, it is inefficient, and it is difficult to uniformly apply grease unless you constantly pay attention to defects in the brush, making it impossible to achieve appropriate labor savings. As a result, heavy manual labor cannot be relieved, and the waiting time for the thread cutting machine increases, making it impossible to take full advantage of the long-awaited improvement in capacity. It had the disadvantage that it was not. The present invention eliminates the disadvantages and shortcomings of the conventional method as described above, and allows the grease application work and the coupling installation work to be carried out continuously and accurately in the manufacture of pipes with couplings, thereby achieving appropriate labor savings. We proposed a new device that can improve efficiency and efficiency, and its basic feature is a device for attaching a coupling to a threaded part formed at the end of a tube, and it can be raised and lowered. The upper frame that has become
A coupling mount is installed on this upper frame and is movable in the direction of the pipe axis, a floating pedestal is installed above the coupling mount in a floating manner via an elastic body, and a an automatic grease applicator having a high-speed rotating header that can move forward and backward in the direction of the core, and a stand that supports the end of the tube on the floating stand;
A roller for supporting and rotating the coupling and a micro-vibration generator are provided.

One embodiment of the present invention will be described below with reference to the accompanying drawings. Figures 1 to 4 show an outline of the apparatus according to the present invention, in which a main body 1 of a coupling mounting machine is fixed on a base. It consists of a lower frame 2 and an upper frame 3 that can be raised and lowered by a cylinder 4 and a guide 5 for raising and lowering the frame provided on the lower frame 2,
As shown in FIG. 2, the upper frame 3 is provided with running grooves 6, 6 in the Soni direction, and wheels 8 that engage with the running grooves 6, 6 are provided.
. The coupling mounting base 9 is integrally provided with a plurality of spring receivers 12 on both sides in the direction perpendicular to the pipe axis direction. fixed,
Suspension springs 13, 13 are provided between the respective spring receivers 12, 12 and the coupling mounting base 9, and the suspension springs 13, 13 are used to provide a suspension.

The floating table 14 is supported in a floating manner, and on the bottom surface of the floating table 14, there is installed an existing vibration motor 15, such as a Urasmo motor, which vibrates with a constant amplitude and a constant force.
A vibration motor 15 is used to apply vibration to a coupling B mounted on a floating table 14, which will be described later. When the vibration motor 15 is rotated with its center of gravity centered, it produces vibrations due to an unbalanced load. And the above.

On the coupling table 14, there is a V roller 1 that supports the tip of the pipe A to which the coupling is to be attached on the front side.
A pedestal 16 equipped with 7, 17 is attached, and parallel rollers 18, 18 for rotating the coupling are arranged on the rear side of the floating pedestal 14. Both parallel rollers 18, 18 thus have a centering adjustment mechanism.
An example of this is as shown in FIGS. 2 and 3, that is, in this embodiment, each of the bearings 21, 21 supporting both ends of the shafts of the parallel rollers 18, 18 is connected to the opposing bearing part and its bearing part. The bottoms of the parts are integrally connected, and a dovetail part 20 is provided at each bottom to fit into a dovetail groove 19 provided in the floating table 14, and the bearings 21, 21 are connected to both ends of the floating table 14. A screw shaft 22 like a turnbuckle supported by the bearings 21, 21 is threaded through the screw shaft 22. Therefore, in adjustment, by rotating the screw shaft 22, both bearings 21,
are moved toward or backward from each other, thereby adjusting the degree of opening between the two parallel rollers 18, 18, and centering the coupling B mounted thereon. A hydraulic motor 23 is fixed to the rear side of the coupling mount 9, and its output shaft is connected to one of the rotating shafts of the parallel rollers 18 by a universal joint 24, so that the parallel rollers 18, 18
is rotated at a predetermined speed.

The hydraulic motor 23 can be set to a constant torque, and if the mounting torque between the tapered threaded part A' of the pipe A and the coupling B exceeds a certain level, excessive pressure will occur and the automatic shutoff will occur. It is designed to stop rotating automatically. Furthermore, a pedestal 26 that pivotally supports the middle of the lever arm 25 is erected on the coupling mounting base 9 near the hydraulic motor 23, and the lever arm 25
An operating rod of a pinch roll actuating cylinder 27 fixed to the pedestal 26 is connected to one end, and a pinch roll 28 is attached to the end of the lever arm 25 facing the center line of the tube axis between the parallel rollers 18, 18. It is being Incidentally, two pinch rolls 28 may be installed diagonally above and on the left and right sides. On the other hand, in contrast to the above-described coupling mounting device, an automatic grease applicator is provided on a support base 29 attached to the rear side of the lower frame 2.

That is, the configuration of the device is as shown in FIGS. 1 and 4. First, the rear part is placed on a support base 29 with a propulsion hydraulic cylinder 3.
A slide stand 31 connected to the tube 0 and configured to move forward and backward in the tube axis direction is disposed, and a header 32 extending in the tube axis direction can be installed on the front surface of the slide stand 31 according to the diameter of the coupling B. As shown in FIG. 4, the outer pin 33 is fixed to the tip of the header 32 as shown in FIG. A head 36 is attached and rotated at high speed by an air turbine 33. On the other hand, a grease tank 37 which is pushed out by air is fixed above the support base 29, and below this grease tank 37 is a grease supply plunger. 38 and a midget cylinder 39 for supplying grease to the rear of this grease plunger 38.
A flexible hose 40 for sending the grease pushed out by the cylinder 39 is connected to the front part of the grease supply plunger 38, and the flexible hose 40 is connected to a grease supply pipe 41 provided in the header 32. The grease supply pipe 41 is connected to the grease application head 3 through the hollow shaft of the air turbine 33.
6 to the nozzle 42. Although not shown, the automatic grease applicator is slidably provided with a limit device so as to automatically stop the rotation of the head when the grease application to the coupling B is completed.

In addition, as a mechanism for raising and lowering the header 32, the header 32 is slid in the height direction through a guide hole formed in the rear part 32' by a bolt inserted into the front surface of the slide base 31. A simple method is to use a nut as thin as desired, but of course a lifting mechanism such as a cylinder may also be used. In other drawings, reference numeral 43 denotes a coupling supply mechanism provided on the side of the coupling mount 9, which is inclined toward the parallel rollers 18, 18 and feeds an appropriate number (for example, 20 to 4 boxes) of couplings B. A chute 44 whose pupils are loaded in parallel, and a locking means 4 provided near the tip of the chute 44 for sequentially loading the coupling B onto the parallel rollers 18, 18 as the work progresses.
It consists of 5.

Reference numeral 46 is a skid that supports the tip of the pipe A and allows the pipe to slide on it and is made of a fixed rail with a side track.

However, to explain the state of applying grease and installing the coupling according to the present invention, first, the tapered threaded portion A' of the pipe A' has been machined by a thread cutter and is kicked in with a so-called snap-in device of the so-called lumber bar type or walking beam type. It is stopped on a slit 46 whose stopper position has been slid in advance according to the diameter.

Now that the tube A is stopped at the center position of the coupling installation machine, the cylinder 4 is activated and the upper frame 3 is raised until the V rollers 17, 17 placed above it come into contact with the tube A. . Thus, the tip of the tube A is supported by the V rollers 17, 17. On the other hand, at the same time or around the same time, Coupling Kousonsha Mechanism 4
The locking means 45 of No. 3 is activated, whereby the couplings B lined up on the chute 44 and the parallel rollers 18, 18 are automatically supplied. Although the coupling B and the tube A are thus positioned opposite each other, the tube A is often bent slightly during manufacturing or subsequent handling.

If the coupling B is screwed together in such a state, the alignment may become defective due to misalignment, or accidents such as jamming may occur. However, in the present invention, the V rollers 17, 17 and the parallel rollers 18, 18 are provided on the floating base 14, and the floating base 14 is connected to the suspension spring 13, which is disposed on the coupling mounting base 9.
13, the suspension springs 13, 13 are actuated when the tube A comes into contact with the V rollers 17, 17, and this causes the parallel rollers 18, 18 and the coupling B sent thereto to be activated. Since the coupling B floats and naturally follows the bending of the pipe A, by simply stopping the coupling B between the parallel rollers 18 and 18, the center between the tapered threaded part A' and the coupling B can be automatically aligned regardless of the bending of the pipe. This will ensure consistency. In addition, since the parallel rollers 18, 18 have a centering adjustment mechanism, by setting the opening degree of the parallel loafs 18, 18 in advance, even if the outer diameter of the pipe A changes, the floating method described above can be maintained. alignment can be performed smoothly. When coupling B and pipe A are set as described above, coupling B is rotated by the hydraulic motor 23 whose torque is set to a constant value, and at the same time, the pinch roll 28 is lowered by the pinch roll operating cylinder 27. to contact coupling B.

Next, the cylinder turtle 0 for forward and backward movement is activated, and the coupling mounting base 9 having the floating base turtle & to which the coupling B is attached begins to move forward toward the pipe A. If the hydraulic cylinder 30 is actuated at this stage or when the rotation of the coupling B starts, the slide table 3 to which the header 32 is attached is moved forward at low speed, thereby causing the grease application bed at the tip of the header 32 to move forward at low speed. 36 is inserted into coupling B. Then, a certain amount of the grease stored in the tobuko grease tank 37 is supplied to the grease supply plunger 38 by the midget cylinder 39.
From there, the flexible hose passes through the grease supply pipe 41 in the header 32 and is extruded from the nozzle 42 in the grease application head 36. At the same time, the air turbine 33 is driven. As a result, the grease application head 36 starts to rotate at high speed, so if the hydraulic cylinder 30 is operated at a constant speed in conjunction with this, the grease in the grease application head 36 will be released into fine particles from the slit 35 by the centrifugal force caused by the high speed rotation. The grease is applied uniformly to the inner surface of the coupling B.When the grease is applied to the end of the coupling B, the limit device automatically removes the air tar pin 3 as described above.
3 stops rotating, and the header 32 also moves back due to the retraction operation of the hydraulic cylinder 30, which completes the automatic grease application work.

In other words, a limit switch is provided on the fixed side of the coupling mounting base 9, etc., and a striker is provided on the header 32 side. As a result, the rotation of the air turbine 33 is stopped, and the hydraulic cylinder 30 is operated backward by the electromagnetic switching valve.The coupling B coated with grease in this way is as described above. While being rotated by the hydraulic motor 23, the cylinder IQ for forward and backward movement approaches the pipe A and begins to screw into the tapered threaded portion A'.At this time, the vibration motor 15 operates and the rotating coupling B slightly Since the vibration is applied, the slight vibration causes no biting failure at the start of screwing, and smooth installation is achieved.

When the coupling B is fully screwed into the tapered threaded portion and reaches a certain torque, the hydraulic motor 23 stops driving, the parallel rollers 18, 18 stop rotating, and then the rod of the cylinder 27 is retracted. When the lever 25 is turned, the pinch roll 28 is raised, thus completing the automatic coupling installation work. When both operations are completed in this way, the cylinder 4 is lowered to the extent that the raised pinch roll 28 does not come into contact with the coupling B, and the pipe A' to which the coupling B has been attached becomes free. A is jumped onto the rear skid by a lever of a jumping device (not shown), and when this is finished, the next pipe is loaded again, and by repeating the above operation, both the grease application and coupling installation operations are performed automatically. It will be carried out in the future.

According to the present invention as described above, it is now possible to perform the coupling attachment work to the pipe body and the grease application work, which were conventionally performed separately, in succession, smoothly and accurately. Not only can the overall coupling installation process be appropriately labor-saving and streamlined, but it is also possible to support the pipe end and the coupling on a floating stand installed via an elastic body. As a result, the pipe and coupling cores can be automatically aligned, and the high-speed rotating header in the automatic applicator can use centrifugal force to turn the grease into fine particles and evenly apply it to the inner surface of the coupling. Moreover, since a micro-vibration generator is installed on the floating table to give micro-vibrations to the coupling, various excellent effects can be obtained, such as properly preventing the occurrence of gluing defects at the beginning of installation. It is.

[Brief explanation of the drawing]

Fig. 1 is a side view showing one embodiment of the device according to the present invention, Fig. 2 is a vertical sectional front view taken along the row 0 line in Fig. 1, and Fig. 3 is a centering adjustment of the coupling mounting machine according to the present invention. An explanatory view showing one embodiment of the mechanism, FIG. 4 is a partially cutaway enlarged view of the grease supply head portion. In the figure, 2 is the lower frame, 3 is the upper frame, and 4 is the lower frame.
1 is a cylinder for raising and lowering the frame, 9 is a coupling mounting base, 10 is a hydraulic cylinder for forward and backward movement, 13 is a suspension spring, 14 is a floating stand, 15 is a vibration motor, 1
7 and 17 are V rollers, 18 and 18 are parallel loafs,
30 is a hydraulic cylinder, 31 is a slide table, 32 is a header, 33 is an air turbine, 36 is a grease application head, 37 is a grease tank, 39 is a midget cylinder,
A indicates a pipe, A' indicates a tapered threaded portion, and B indicates a coupling. Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] 1. A device for attaching a coupling to a threaded part formed at the end of a tube body, which includes an upper frame that can be raised and lowered, and a device installed on this upper frame that can reciprocate in the direction of the tube axis. It consists of a coupling mount, a floating table floatingly installed above the coupling mount via an elastic body, and an automatic grease coating device having a high-speed rotating header that can move forward and backward in the direction of the pipe core. A coupling mounting device characterized in that a floating table is provided with a frame for supporting an end of a tube, a roller for supporting and rotating the coupling, and a micro-vibration generator.