JPH0638950Y2 - Hand tight device for pipe fittings - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention relates to a handtight device for screwing, for example, a coupling for coupling oil well pipes (hereinafter referred to as "coupling") into a pipe end thread portion. is there.

(Prior Art) There are three types of oil well pipes: a drill pipe, a casing, and a tubing. Usually, a pipe body is directly threaded and connected by a coupling. In this type of oil country tubular goods, the tightening of the coupling is managed mainly in accordance with the API standard (standard established by the American Petroleum Institute).

(Problems to be solved by the device) The API standard has been standardized sequentially according to the application conditions of oil well pipes, that is, the depth of wells, changes in the environment, etc. I have to manufacture it. That is, a pipe joint or a special pipe joint having a screw with a clearance smaller than that of the conventional API standard screw is used. However, this pipe joint has an extremely small screwing gap between the pipe end screw and the coupling screw. It is the actual situation.

The present invention has been made to solve such a problem, and an object thereof is to obtain a handtight device capable of automatically screwing a pipe joint.

(Means for Solving the Problems) In order to achieve the above-mentioned object, in a handtight device for a pipe joint of the present invention, an abutment supporting a pair of parallel receiving rollers is movable via a vibration-proof rubber. The tire is installed on a table, is provided with a vibration motor for slightly vibrating the receiving roller, and is further provided with a tire and an operating mechanism for giving a rotational motion to a pipe joint supported by the receiving roller.

(Operation) In the handtight device for pipe fittings of the present invention, an abutment supporting a pair of receiving rollers arranged in parallel is installed on a movable table via a vibration-proof rubber and a vibration for vibrating the receiving rollers slightly. It is equipped with a motor and a tire that gives a rotational motion to the coupling supported by the receiving rollers and its operating mechanism.The coupling supported by the pair of receiving rollers facilitates screw engagement. A slight vibration is applied to the pipe end, and the pipe is screwed into the pipe end threaded portion at a low speed while rotating.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings.

Reference numeral 1 denotes a pair of receiving rollers which are supported by an abutment 2 and which are parallel to each other, and a roller slightly longer than the length of the coupling A is applied. And the abutment 2 is a vibration-proof rubber 3
The vibration motors 5 are installed on the movable table 4 via the, and the vibration motors 5 that give a slight vibration to the coupling A are further mounted on the back surfaces of the respective supports 2.

By the way, the movable table 4 is composed of a traverse table 6 having a function of adjusting the roller interval corresponding to the diameter of the coupling A, and a forward / backward moving table 7 for moving the coupling A back and forth toward the pipe end screw portion. Has been done. That is, the pedestal 6 is designed so that the center of the coupling A is aligned with the center of the pipe end threaded portion by changing the interval between the left and right by the screw shaft 9 which is rotated by the operation of the handle 8. A lock knob 10 is provided on the outer end of the screw shaft 9. The forward / backward moving table 7 is slidably mounted on a base 11, and a hydraulic cylinder 12 for forward / backward movement thereof is provided.

Reference numeral 13 is a radial tire that presses the coupling A with a required force and gives it a rotational movement. The rotational movement of the radial tire is carried out via a transmission mechanism consisting of a drive shaft 15 and a transmission gear 16 connected by a universal joint 14. A holder for supporting the drive shaft 15, which is given by the motor 17 and further pressed.
It is given by the actuation of an air cylinder 19 via 18.

In the figure, 20 is an adjusting rod corresponding to the difference in outer diameter of the coupling A, 21 is a guide shaft, 22 is a rotation detecting means, and 23 is an underframe for supporting the above-mentioned respective mechanical members. It is erected on the forward / backward moving table 7 described in Section 1.

The present invention has the above-mentioned structure, and its operation will be described below.

That is, although not shown, the steel pipe after the thread cutting is conveyed onto the V-shaped table and clamped. After that, the coupling A is carried in from the supply device and placed on the receiving roller 1, and the hydraulic cylinder 12 is operated to advance the coupling A together with the movable table 4 to the pipe end thread portion of the steel pipe. Here, the handle 8 is operated to adjust the roller interval by the rotation of the screw shaft 9 and the movement of the traverse base 6 in accordance therewith, whereby the height of the coupling A and the pipe end screw portion, that is, the center alignment is performed. Then activate the hydraulic cylinder 12,
Automatic operation is started when the coupling A is retracted.

In this automatic operation, the radial tire 13 is lowered by the air cylinder 19, the coupling A is pressed by a required force, and the radial tire 13 is rapidly advanced to about 10 mm from the tip of the pipe end screw portion, and then the radial tire 13 is moved to the hydraulic motor 17. The coupling A is screwed to the pipe end thread portion by the low speed forward movement while rotating the vibration motor 5 to give a slight vibration, and after the screwing is started, the rotation of the cup relang A by the radial tire 13 is started. Screwed by.

(Effects of the Invention) As described above, the present invention installs the abutment supporting the pair of receiving rollers arranged in parallel on the movable table through the vibration-proof rubber, and vibrates the receiving rollers slightly. Since the tire is provided with the motor and the operation mechanism of the tire is provided to rotate the coupling supported by the receiving roller, the following effects are achieved.

Since slight vibration and rotation are applied to the coupling roller on the receiving roller, screwing into the threaded portion of the pipe end is performed smoothly and automatically, and the height of the coupling to the threaded portion of the pipe end is automatically adjusted. The operation until shifting to the operation can be performed accurately.

[Brief description of drawings]

The drawings show one embodiment of the present invention. FIG. 1 is a side view and FIG. 2 is a front view. 1 is a receiving roller, 2 is an abutment, 3 is an anti-vibration rubber, 4 is a movable base, 5 is a vibration motor, 13 is a radial tire, 17 is a hydraulic motor, and 19 is an air cylinder.

Claims (1)

[Scope of utility model registration request] 1. An abutment supporting a pair of receiving rollers arranged in parallel is installed on a movable table through a vibration-proof rubber, and a vibration motor for slightly vibrating the receiving roller is provided, and the receiving roller is further supported. A handtight device for a pipe joint, which is provided with a tire that gives a rotational motion to the pipe joint and an operating mechanism thereof.