JPS6156834A - Coupling starter - Google Patents

Abstract

PURPOSE:To prevent incomplete screwing due to unmatch between the centers of threaded sections of coupling and pipe and the center line by providing a circumferential floating mechanism and an angular floating mechanism. CONSTITUTION:After carrying a coupling B to face against a pipe A, an oil motor 5 is functioned to rotate a spindle 4 and a chuck 1 to be engaged through an Oldham's coupling to one end of said spindle through gears 6, 7. Upon movement of the pipe A to predetermined position through driving of D.C. motor 18, a circumferential floating mechanism comprised of a spring box 8 and a casing 11 is functioned. While upon reaching of the threaded section B' of coupling to the vicinity to contact against the threaded section A' of pipe, an angular floating mechanism comprised of a spherical face seat 10 and the body 12 is functioned. By means of said two mechanisms, the coupling can be advanced smoothly to predetermined position.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention (c) relates to an improvement in a coupling starter for attaching a threaded part such as a coupling to a threaded seal pipe.

[Prior art]

When shipping thread-sealed pipes such as oil country tubular goods and gas pipes, a coupling starter is used to attach the coupling (including thread protector) to the threads machined in the oil part of the pipe body. is being installed.

5 to 7 are diagrams of a conventional coupling starter disclosed in Japanese Patent Publication No. 56-42415. However, in the figure, the grease application device disclosed in the above publication is not shown.

In the figure, 61 is the main body of the coupling cylinder starter, 62
is a frame fixed on the base floor, 66 is an upper frame,
64 is a cylinder for vertically moving the frame, 65 is a guide, 66 is a running groove running in the tube axis direction provided in the frame 66, 67
a mounting base 70 with wheels 68 that engage with the running groove 66;
72 is a cylinder connected to the rear of the mounting base 67 via a buffer body 71; 72 is a spring fixed to the upper surface of the mounting base 67 and suspending the floating base 74 via a spring 76; and 75 is a bracket. A vibration motor 76 is attached to the lower surface of the floating table 74, and a pair of V-shaped rolls 77 are pivotally attached to the upper part, and a pedestal 81 is fixed to the floating table 174. Arrived at @ and installed on floating stand 74.
The dovetail part 80 is fitted into the dovetail groove 79, and the threaded shaft 820 times 820 times kK is attached to the floating table 74, so that a pair of bearings 86 slide in the direction of the U angle with the bone thin 1. is a hydraulic motor whose output shaft is connected to one IT1 rolling shaft of the parallel roller 78 by a universal joint 84; 86 is installed upright on the mounting base 67;
- This is a pedestal on which a pinch roll 88 is attached, and a lever arm 85, to which a rod of an operating cylinder 87 is connected to the narrow end, is centrally supported. -1'Al-1-Threaded W, A'
is its tapered threaded portion, B is the coupling, 90 is the coupling supply mechanism provided on the side of the mounting base 7, and 91 is g.
This is a skid that supports the tip of A.

Next, the operation will be explained. First, the pipe A has a skid 9 whose stopper position is slid in advance according to its diameter.
It is stopped at 1. Next, the cylinder 64 is operated to raise the upper frame 63i until the V-type roller 77 comes into contact with the tube AK, and the tip of the tube A is supported by the V-type roller 77. -1000' At the same time, the coupling supply t'jN71t9G is operated, and the coupling B is automatically supplied to the parallel roller 78, so that the coupling B and the pipe A are positioned facing each other. Generally, tube A is often slightly bent during manufacturing or subsequent handling. Therefore, in this state, coupling B is connected to pipe A.
If it is installed on the holder, the center lines of the two may not match, which may cause problems such as fitting problems or jamming. However, in this device, the V-shaped roller 77 and the Hihararel roller ;'a are provided on the ;yo-ting table 74,
Since the 70-tinder stand 74 is supported in a floating manner by a spring 76 disposed on the camp ring mount 67, when the pipe A comes into contact with the ■-shaped roller 77, the spring 73 is actuated. Since the parallel roller 78 and the coupling B placed on it are also floating and naturally follow the music of the person V, simply leaving the coupling B stationary on the parallel roll 78 will cause the connection to the bending of the pipe. Therefore, the centers of the tapered threaded portion A' and the coupling B can be automatically aligned. Note that the parallel rollers 78 have a center alignment adjustment (4), so by rotating the screw shaft 82 in advance to move the bearing 81 and fully adjusting the opening of the pair of parallel rollers 78,
Even if the outer diameter of the tube changes, the upper 11 can float.

Next, the coupling B approaches the pipe by the cylinder 70 while being rotated by the hydraulic tongue 83 and begins to engage the tapered threaded portion A', but at this time, the vibration motor 75 is activated. By applying slight vibrations to the rotating coupling B, it is possible to prevent a spraying failure at the start of screwing.

In this conventional device, the camp ring B is attached to the threaded part A of the WA.
When screwing on the coupling B (!: Pipe A is a large
- 70 is supported by a parallel roller 78 fixed on a holding table 74 and a V-shaped roller 77;
If the parallel rollers 78t are set in advance, the centers of the coupling B and the pipe A can be aligned with each other based on their respective outer diameters. Shirikiji 1. Looking at the state of thread machining for couplings B and 9A, the centers of the outer diameters of the couplings and pipes do not exactly match the centers of the threaded parts, and furthermore, pipe A has a curved υ after machining. So, when the center lines of the threaded part of the coupling and the threaded part of the pipe coincide,
This is almost impossible to expect.

If the thread is a triangular thread, even if there is a certain degree of mismatch in the center lines of the threaded parts of the coupling and the pipe, there will not be a significant difference in the threaded connection between the coupling and the pipe, but in the case of a square thread, If the center lines of the threaded portions do not match, and even if the centers of the threaded portions do not match, the threaded portions will interfere and it will be difficult to screw the coupling B into the threaded portion of the pipe A. It is impossible to screw in the screws smoothly, and there is a risk of the screws galling or damage to the threads. For this purpose, a watchman must be constantly on the move, which was a major drawback of conventional systems.

[Purpose of the invention]

The present invention provides a coupling starter in which a threaded part such as a coupling is screwed onto a threaded bamboo pipe as described above.
This is one of the inventions made to solve the drawbacks of the conventional 6° device, and it can prevent screwing failure caused by mismatch between the center of the threaded part of the coupling and the center of the threaded part of the pipe, or the bend 9 of the pipe. The purpose is to prevent screw galling, damage to threads, etc.

[Summary of the invention]

In order to achieve the above object, the present invention provides a circumferential floating mechanism and an angular floating mechanism in a screwing device constituting a coupling starter, and when installing a coupling on a threaded portion of a pipe, Circumferential floating machine in place? Then, by operating the angle floating mechanism near where the threaded part of the coupling and the threaded part of the pipe contact, the centers and center lines of the threaded part of the coupling and the threaded part of the pipe are aligned, and the coupling is removed. It is an object of the present invention to provide a coupling starter that can be smoothly screwed into a pipe to a predetermined position t.

[Embodiments of the invention]

FIG. 1 is a cross-sectional view of a main part of a screwing device showing an embodiment of the present invention, in which 1 is a chuck configured to open and close a collet 1at via a shaft 3 by driving an oil motor 2;
4 is a spindle, 5 is a gear, an oil motor rotates the spindle 4 via 6°7, and 8 is a spring box. As shown in FIG. 2, the spring box 8 includes a spring casing 8a, a rod 8b having a cam 7 lower 8d attached to one end thereof, and a spring 8c.
Toyorinashi, outer peripheral part 1 of chuck 1 of casing 11
The outer periphery of the chucks 1, which are disposed in plural pieces on the chuck 1a and are engaged with the spindle 4 via a Waldham joint (not shown), is
Since the spring 8C is held in a rotatable state, the chuck 1 can float freely in the circumferential direction to some extent, thus forming a circumferential floating mechanism. Reference numeral 9 denotes a locking device operated by a hydraulic cylinder for fixing the chuck 1 to the casing 11 at a predetermined position. As shown in FIG. 6, this locking device is a hydraulic device consisting of a hydraulic cylinder 9a and a plunger 9b, and presses the cam 7 of the spring box 8 in the direction of the arrow 8d'i, thereby locking the outer peripheral portion 11a of the chuck of the casing.
The floating chuck 1 is fixed at a predetermined position by being fixed to the chuck 1. Further, reference numeral 10 denotes a chuck part 21 consisting of a casing 11 of a screwing device, a spindle 4, a chuck 1, an oil motor 2.5, etc.
14 is a spherical seat that makes spherical contact with the main body 12 about the center point 16 of the chuck part 21, and 14 is a spherical seat that allows the chuck part 21 to slide on the spherical seat AO and move toward the chuck 1 about the center point 16 due to its own weight. Main body 12 for the purpose of balancing tilting.
A plurality of pieces are fixed to the casing 11 via springs.
This is a paralyzer that supports the outer periphery of the . The above-mentioned spherical seat 10 and the balancer 14 balance the weight of the chuck part 21 and the spring force of the balancer 14, so that the center line 15 of the chuck part 21 freely precesses to a certain extent from the center point 13t of the spherical seat 10 to the center. It constitutes an angular floating mechanism that can be used. Further, 16 is a locking device operated by a hydraulic cylinder for returning and fixing the angle floating 14 in the 70 to ting state to its original position, and 18 is a screw shaft 19.
This is a DC motor that drives the screwing device main body 12 in the horizontal direction. Also, A is the tube, A/ is its threaded portion, and B is the coupling, and B/ is its threaded portion.

Next, the operation will be explained. In Fig. 4, the conveyor P
1 Coupling B k transported via insertion device Q
, the screwing device R gripped by the chuck 1 is rotated 90' in the direction of the arrow 2o about its central axis of rotation 17, so that the coupling B is opposed to the pipe A clamped on the pipe flang device fj3s). Next, the oil motor 5 is operated as shown in FIG. 1, and the gear 6. 7 to rotate the spindle 4 and the chuck 1, which is connected to one end of the spindle 4 via a Waldham joint (not shown). At the same time, DC motor 1
8 to move the screwing device main body 12 in the direction of the pipe A via the screw 19. When the coupling holder B reaches a predetermined position on the pipe A, the locking device of the circumferential floater (1-ing mechanism) is released to allow the chuck 1 to float in the circumferential direction, and the coupling B held by the chuck 11C Even if the centers of the threaded part B of the coupling and the threaded part A' of the pipe A do not coincide, interference of the threads can be prevented by floating the chuck 1 in the circumferential direction. ′ reaches the vicinity where it comes into contact with the threaded portion A′ of the pipe, the center line of the threaded portion B′ of the camp ring does not coincide with that of the threaded portion A′ of the pipe due to the curvature of the pipe, and the thread Since there is a risk of interference between the ridges, if the lock of the angle floating mechanism is released and the angle floating mechanism is allowed to function freely, the chuck part 21 will be aligned with the center line of the threaded part A' of the pipe and its center line 15 will be moved. Since the inclination angle can be changed freely and it floats, the threaded part B of the coupling
' is screwed into the threaded part A' of the pipe without interference, and the coupling B can be smoothly advanced to the predetermined position tM of the pipe A without galling the thread or damaging the thread thread. can.

Although the above embodiment is an example in which the camp ring is attached to a threaded bamboo tube, it goes without saying that it can be used similarly for other threaded parts.

〔Effect of the invention〕

As mentioned above, the chuck part of the one-cut printer starter screwing device is equipped with a circumferential floating mechanism and an angular floating mechanism, and when the coupling is screwed into the threaded part of the pipe, the first circumferential floating mechanism Next, we developed the angle floating mechanism to function, so even if there is a mismatch in the center or mismatch in the center line of the respective threaded parts of the coupling and the pipe, there will be no risk of galling or damage to the threads due to this. It is now possible to smoothly advance the coupling T'' pipe to the specified position without causing any problems.

[Brief explanation of drawings]

Figures 1 to 34 show embodiments of the present invention.
2 is an enlarged view of the spring box, FIG. 6 is an enlarged view of the circumferential floating locking device, and FIG. 4 is a plan view of related devices of the cup cylinder starter. 5 to 7 are a plan view, a side view, and a partially enlarged view of the conventional device. In the figure, 1 is a chuck, 2 is an oil motor, 6 is a shaft, 4 is a spindle, 5 is a first motor, 6.7 is a gear 18 is a spring box, 8a is a spring casing, 8b
is rod, 8C is spring, 8d is cam 7 lower, 9
is a locking device, 9a is a cylinder, 9b is a plunger, 1
0 is a spherical seat, 11 is a casing, 12 is a main body, 13 is a center point of a spherical seat, 14 is a balancer, 15 is a center line of a chuck part, 16 is a locking device, 17 is a rotation center axis of the main body, 1
8 is a DC motor, 19 is a threaded shaft, 21 is a chuck part A is a pipe, A/ is its threaded part, B is a coupling, and B/ is its threaded part.

Claims (2)

[Claims] (1) In a coupling starter screwing device comprising a screwing device and a tube clamp device, the casing of the screwing device is connected to the screwing device through a plurality of spring boxes each consisting of a spring, a spring casing, a rod, and a cam follower. A circumferential floating mechanism is provided so that the chuck can float in the circumferential direction relative to the casing by freely holding the chuck, and the casing, chuck, spindle, and rotational drive of the screwing device are provided. A chuck part consisting of a device etc. is pivotally attached to the screwing device main body by a spherical seat, and a plurality of balancers consisting of a spring, a rod and a spring case are arranged on the outer periphery of the screwing device main body, A coupling starter further comprising an angular floating mechanism configured to allow the chuck portion to precess around the center point of the spherical seat. (2) The circumferential floating mechanism and the angular floating mechanism are each equipped with a locking device, and when the locking device is activated, the former locks the chuck at a predetermined position due to the floating movement, and the latter locks the center line of the chuck due to the floating movement. 2. The coupling starter according to claim 1, wherein the coupling starter is configured to return and fix the change in inclination angle to the original position.