JPS6220857B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lubricant application device for a threaded portion that applies a lubricant such as grease to a threaded portion provided at a pipe end for connecting a pipe joint.

For example, when shipping oil country tubular goods from a pipe manufacturing factory, a thread must be cut on the outer surface of the pipe end in advance, and a pipe joint must be screwed thereon. In order to ensure this screwing, a lubricant made of grease of a specified standard is applied evenly and without defects to the threaded part on the outer surface of the pipe end and the threaded part on the inner surface of the pipe fitting. It is necessary to screw a plug into the internal thread of one side of the pipe joint.

This lubricant is generally applied manually in many cases, and a known method of applying lubricant by mechanical means is to rotate a nozzle at high speed and spray using centrifugal force. However, with this conventional device, it is difficult to apply lubricant to the outer surface of the tube end, and furthermore, since high-speed rotation is required, the seal portion is likely to be damaged, and maintenance etc. requires considerable effort.

An object of the present invention is to provide a lubricant application device for a threaded part, which eliminates the above-mentioned drawbacks and uses a brush to automatically and reliably apply lubricant to the threaded part on the outer surface of a pipe end or the inner surface of a pipe fitting. The gist of the device is to provide a device for applying lubricant to a pipe end or a threaded portion of a pipe joint connected to a pipe end, the device comprising:
A nozzle mechanism for supplying lubricant to the threaded section, a brush for applying the lubricant to the surface of the threaded section, a mechanism for rotating the brush, and a brush and tube for changing the surface contact position between the brush and the threaded section. It has a relatively rotating mechanism and is characterized in that it applies lubricant evenly to the entire surface of the threaded section.

The present invention will be explained in detail based on illustrated embodiments.

Figures 1 and 2 show an embodiment of an applicator for applying grease to a threaded portion on the outer surface of a tube end. installed. Furthermore, this coating device is provided with a hydraulic cylinder device 4 for moving the movable base 3, a brush drive device 5, a power transmission device 6, a brush device 7, and a grease dripping device 8.

The drive device 5 includes a motor 51 fixed on the movable base 3 and a reduction gear 52 directly connected to the motor 51.
A sprocket 53 is attached to the output end of the reduction gear 52, a chain 54 is driven by the sprocket 53, and a sprocket 55 meshes with the chain 54. It is pivotally attached to the input shaft 61.

An input shaft 61 of the power transmission device 6 is rotatably supported by a support 63 provided on the movable base 3 via a bearing 62 . As shown in the mechanism diagram in FIG. 2, the disc 6 attached to the bearing box 64 of the bearing 62
5 is provided with an internal gear 66, and a sun gear 67 is fixed to the input shaft 61. These internal gear wheels 6
6. A pin 70 to which two planetary gears 68 that mesh together with the sun gear 67 are fixed to a planetary gear carrier 69.
It is rotatably supported by. These internal gears 66, sun gear 67, and planetary gears 68 form a planetary gear system, and in this embodiment, the internal gears 66 are fixed, and the planetary gear carrier 69 rotates at a reduced speed. ing.

A cylinder 41 of the hydraulic cylinder device 4 is constructed on the frame 1 by a bracket 42, and the left end of the cylinder rod 42 is attached to the movable base 3. A limit switch 11 provided on the frame 1 has a cam plate 31 attached to the lower part of the movable base 3,
12, the stopping position of the movable base 3 is determined. Further, the stroke of the movable base 3 is determined by an operating section 32 fixed to the movable base and a limit switch 13 attached to the frame 1.

In the brush device 7, a brush rotating gear 71 that meshes with two planetary gears 68 is connected to two rotating shafts 72.
are each attached to a shaft. At the tip of the rotating shaft 72, there are brushes 7 each having a large number of stiff bristles.
A bearing device 74 that supports the rotating shaft 72 is connected to the planetary gear 68 along two arc-shaped slots 75 formed in the planetary gear carrier 69 and centered on the center point of the planetary gear 68. It is designed to move while maintaining engagement with the brush rotation gear 71. Two brackets 76 as shown in FIG. 2 are arranged at the intermediate side of the two rotating shafts 72 so as to rotatably support the rotating shafts 72, respectively. A screw shaft 77 consisting of a turnbuckle is screwed into the internal thread in the opposite direction. Both ends of the bracket 75 are connected so as to move in parallel, and if the protruding end 78 of the screw shaft 77 is made, for example, a square bar, and the screw shaft 77 is rotated with a necessary tool, the distance between the brackets 76, That is, the distance between the centers of the rotating shafts 72 can be changed. Further, a front-open cover 79 is provided to surround the brush 73 to prevent grease from scattering to the outside. However, the upper part of this cover 79 is opened so as not to prevent dripping of grease, which will be described later.

A grease dripping device 8 having a nozzle 81 for dripping grease onto the tube end is arranged above the brush 73. This nozzle 81 can move with the movement of the movable base 3, that is, with the forward and backward movement of the brush 73, and the grease is sent to the nozzle 81 at high pressure via an automatic ball valve 82, from where it is sent to the end of the pipe. It is adapted to be dripped onto the threaded section.

Next, the operation of this embodiment will be explained. When applying grease to the threaded portion on the outer surface of the end of an oil country tubular goods pipe before fitting a pipe joint, the required pipe P is transported by a conveyor (not shown) and fed in the direction of arrow A with its axis aligned with the center axis of the input shaft 61. , clamp in place.

When the motor 5 is operated, the power is transmitted through the reduction gear 52, sprocket 53, chain 54, and sprocket 55 to the input shaft 61 and the sun gear 67.
Rotate. Then, the planetary gear 68 that meshes with the sun gear 67 rotates, and this planetary gear 68 rotates the rotating shaft 72 and the brush 73 via the brush rotating gear 71 on the one hand, and the fixed internal gear 66 on the other hand.
to rotate the planetary gear carrier 69. Therefore, the brush 73 rotates itself, rotates about the axis of the input shaft 61 in the same direction as the rotation direction, and rotates while being in surface contact with the threaded portion around the pipe P.

At the same time, grease is dripped from the nozzle 81 of the grease supply device 8 onto the threaded portion of the pipe P, and the hydraulic cylinder device 4 is operated to cause the movable base 3 to reciprocate at a predetermined stroke. Therefore, the brush 73 turns around the tube end while rotating around its central axis 72, and further reciprocates in the longitudinal direction of the tube. As a result, the threaded portion of the tube end is uniformly coated with grease in a short period of time.

Note that the predetermined interval between the greases 73 must be set in advance according to the diameter of the pipe P. To do this, a necessary tool must be engaged with the protruding shaft end 78 of the screw shaft 77 to rotate the screw shaft 77. 75 brackets,
The distance between the rotating shafts 72 is adjusted to a predetermined interval with respect to the planetary gear carrier 69. During this time, the bearing device 74 is inserted into the curved slot 7 provided in the planetary gear carrier 69.
5, a planetary gear 68, a brush rotation gear 71
maintain the interlocking between them. Furthermore, in this embodiment, by placing the rotary shafts 72 in close proximity using the threaded shaft 77, it is possible to even out the grease on the threaded portion of the inner surface of the pipe joint.

Figures 3 to 5 show a second embodiment of the apparatus for applying grease to the threaded part on the inner surface of a pipe joint C;
The brush does not revolve, but the pipe P connected to the pipe joint C is rotated by a turning roller R. As shown in FIG. 3, a movable base 92 is mounted on a guide rail 91 provided on a frame 90 so as to be movable back and forth by a hydraulic cylinder 93. As shown in FIG. Piston rod 9 of hydraulic cylinder 93
4 is connected to a movable base 92, and a cam 95 attached to the movable base 92 operates limit switches 96, 97.
The amount of movement of the movable base 93 is determined by operating the movable base 93.

Further, the drive/brush device 10 is slidably placed on the movable base 92, and the adjustment screw 102 is screwed into the threaded portion of the support 101 provided on the movable base 92.
The initial position between the handle 103 and the end face of the pipe joint C is determined. This drive
A necessary motor and a reduction gear are built into the housing 105 of the brush device 10, and a sprocket 107 is attached to the output shaft 106 of the reduction gear as shown in FIG.
is attached to the shaft, and the central axis of the output shaft 106 is connected to the pipe P.
The position is different from the axis of A swinging member 110 that is rotatable about an output shaft 106 is supported by the housing 105.
A rotation shaft 112 of a brush 111 is rotatably supported on the shaft 112 of the brush 111. A sprocket 113 is fixed to the rotating shaft 112, and a sprocket 114 is supported on the singing member 110 so as to be vertically adjustable.
Then, the chain 115 is engaged between the sprockets 107, 113, and 114, and the sprocket 11
By adjusting the position of 4, the tension of the chain 115 can be adjusted.

An adjustment screw 121 is supported on an adjustment frame 120 attached to the housing 105.
A bracket 112 is supported by this adjustment screw 121 so as to be vertically movable. The pin 123 fixed to the bracket 122 is inserted into the elongated hole 116 of the swinging member 110.
By rotating a handle 124 that is engaged with the handle 124 and fixed to the upper end of the adjustment screw 121, the bracket 122 is moved up and down, and the swinging member 110 is rotated about the output shaft 106.
Since the axis of the output shaft 106 and the axis of the tube P are different,
The brush 111 supported by the swinging member 110 moves up and down with respect to the pipe P and the pipe fitting C, conforming to the inner surface of the pipe fitting and coming into surface contact with the threaded portion of the inner surface of the pipe fitting C at a predetermined position. There is.

A hydraulic cylinder 125 is attached to the housing 105, a piston rod 126 extends rearward to support a support member 131 of a grease dripping device 130, and a nozzle 133 is provided at the end of a tube body 132 extending forward from the support member 130. It is mounted facing downward. Furthermore, a tube end detector 127 attached to the housing 105 detects the end surface of the tube joint C, and can start and stop the operation of the brush 111.

Next, the operation of the grease applicator of this second embodiment will be explained. The hydraulic cylinder 93 is operated to advance the movable base 92, and the brush 111 and the nozzle 133 of the grease dripping device 130 are inserted into the pipe joint C to be greased. The handle 124 of the adjustment screw 121 is rotated to move the bracket 122 up and down, and the pin 123 rotates the swinging member 110 about the output shaft 106 through the elongated hole 106, and the brush shaft 112 is moved up and down to move the brush 11.
1 into contact with the threaded part of the pipe fitting C at a predetermined position. Next, the motor of the drive device is activated, and the output shaft 1
06, sprocket 107, chain 11
5. Rotate the rotating shaft 112 via the sprocket 113, and rotate the brush 111 along with this rotation. Furthermore, the grease dripping device 130 is operated to supply grease to the inner surface of the pipe fitting C from the nozzle 133. When the pipe P and the pipe joint C are rotated by the turning roller R and the hydraulic cylinder 93 is operated to move the movable base 92, the housing 105, and the brush 111 back and forth, the hydraulic cylinder 125 moves the nozzle 13
3 back and forth, the grease is applied to the threaded part. Similar to the devices shown in FIGS. 1 and 2, the brush 111 rotates and moves forward and backward at the same time, and also rotates relative to the pipe P to perform a relative rotation along the pipe P. Therefore, the threaded portion of the pipe joint C can be evenly coated with grease.

As explained above, the device for applying lubricant to a threaded part according to the present invention, when applying lubricant to a pipe end or a threaded part of a pipe joint connected to a pipe end,
It is possible to automatically apply the coating efficiently and evenly to any pipe diameter, contributing to increased work efficiency, stabilization of product quality, and labor savings.

[Brief explanation of the drawing]

The drawings show an embodiment of a device for applying lubricant to a threaded portion according to the present invention, and FIG. 1 is a side view of the device for applying lubricant to an external threaded portion, and FIG. 2 is a mechanical diagram of a power transmission device of the device. FIG. 3 is a side view of the device for applying the coating to the inner threaded portion, FIG. 4 is a front view of the swinging member thereof, and FIG. 5 is an explanatory view of the application state. 3 is a movable base, 5 is a brush drive device, 6 is a power transmission device, 7 is a brush device, 8, 130 is a grease dripping device, 10 is a drive/brush device, 61,
106 is an input shaft, 66 is an internal gear, 67 is a sun gear, 68 is a planetary gear, 69 is a planetary gear carrier,
71 is a brush rotating gear, 72 and 112 are rotating shafts,
73 and 111 are brushes, and 81 and 13 are nozzles.

Claims (1)

[Claims] 1. A device for applying lubricant to a pipe end or a threaded part of a pipe joint connected to a pipe end, comprising: a nozzle mechanism for supplying lubricant to the threaded part; and a brush for applying lubricant to the surface of the threaded part; It has a mechanism that rotates the brush and a mechanism that rotates the brush and the tube relative to each other in order to change the surface contact position between the brush and the threaded part, and it is possible to apply lubricant evenly to the entire surface of the threaded part. Features a device for applying lubricant to threaded parts.