JPH06134421A - Removing device for residual water of screw part in steel pipe - Google Patents

Abstract

PURPOSE:To provide the title device capable of perfectly removing the residual water of the screw part in a steel pipe and capable of also removing and drying the water film remaining on the inner surface of the screw part. CONSTITUTION:A residual water removing device has an upper nozzle 1 blowing off hot air provided to the upper part thereof and a lower nozzle 3 sucking residual water provided to the lower part thereof and the hot air formed by a hot air generator 2 passes through a hot air pipe 2 to be sprayed on the internal screw part 5a of a coupling 5 from the upper nozzle 1. The hot air downwardly flows from both left and right side surfaces of the coupling 5 from above along the inner periphery of the coupling 5 to suck the waterdrops bonded to the inner periphery of the coupling to gather the same to the lower part of the coupling and also dries the water film remaining on the inner periphery of the coupling. By providing the upper nozzle 1 blowing off hot air to the screw part in a steel pipe and the lower nozzle 3 sucking residual water downwardly, the residual water in the coupling can be perfectly removed and the water film remaining on the entire surface of the coupling can be also dried.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel pipe for removing and drying water remaining inside a fixed coupling in a process of removing pressure test water of a steel pipe having an inner screw cut on the inner surface of the steel pipe and a pipe coupling fixed thereto. The present invention relates to a residual water removing device for an inner screw part.

[0002]

2. Description of the Related Art FIG. 4 is a side view showing the structure of a conventional screw joint drying nozzle for steel pipes, 8 is a pipe in which a coupling 5 is screwed into an end portion, and 5a is a screw processed inside the coupling 5. Reference numeral 6 is an air nozzle, 7 is an electromagnetic valve, 9 is an air pipe for sending compressed air from the compressed air main pipe 10 to the air nozzle 6 through the electromagnetic valve 7, and 11 is a mount for mounting the pipe 8.

Next, this operation will be described. The conventional device for the screw joint drying nozzle for steel pipe is configured as described above, and when the pipe 8 having the coupling 5 fixed to the end thereof is transported and placed on the pedestal 11 after the water pressure test, The signal is transmitted, and the electromagnetic valve 7 is excited by this signal to be “open”, and the compressed air is sent to the air nozzle 6 through the air pipe 9. As a result, compressed air is ejected from the air nozzle 6 to blow off and diffuse the residual water below the coupling 5. After that, when the pipe 8 is transferred from the gantry 11 to another place, the electromagnetic valve 7 is released from the excitation and becomes “closed”, the compressed air is stopped, and the ejection of the compressed air from the air nozzle 6 is stopped. .

[0004]

A conventional steel pipe internal screw drying nozzle is one that simply blows compressed air toward the internal screw portion 5a of the coupling 5 when, for example, drying the coupling. The purpose is to diffuse the residual water, but this cannot (1) remove the residual water in the thread troughs of the screw portion 5a. (2) It is impossible to diffuse the entire length of the coupling 5 in the longitudinal direction. (3) There is a problem that a water film remains on the steel pipe 8, the coupling 5, and the entire inner surface.

The present invention has been made in order to solve the above problems, and completely removes the residual water inside the coupling and the residual screw water in the steel pipe inner screw, and also dries the water film remaining on the inner surface. An object of the present invention is to provide a residual water removing device for a threaded portion in a steel pipe that can be used.

[0006]

A residual water removing device for a threaded portion of a steel pipe according to the present invention solves the above problems by providing an upper nozzle for blowing gas at an upper portion and a lower nozzle for sucking residual water at a lower portion. It was done.

[0007]

In the present invention, the residual water remaining in the screw troughs inside the coupling is collected in the lower part by the gas blown from the upper nozzle, and at the same time the water film adhering to the screw parts is dried. The residual water collected in the lower part of the coupling is sucked by the lower nozzle. Thereby, residual water removal and drying can be performed simultaneously. This drying can be made more effective by using warm air.

Further, by forming the openings of the upper nozzle and the lower nozzle into slits elongated in the longitudinal direction, it is possible to simultaneously remove and dry residual water over the entire length of the coupling.

[0009]

1 is a side view showing the overall construction of an embodiment of the present invention, FIG. 2 is a detailed view of the apparatus, (a) is a plan view showing the upper surface of the upper nozzle, and (b) is the structure of the apparatus. Side view,
FIG. 3C is a bottom view showing the lower surface of the lower nozzle, and FIG. 3 is a front view of the nozzle inserted into the coupling. 1 in the figure
Is an upper nozzle, 1a is an opening of the upper nozzle 1, 2 is a hot air generator, 2a is a hot air tube, 3 is a lower nozzle, 3a is an opening of the lower nozzle 3, 4 is a suction blower, 4a is a suction tube, and the like. Reference numeral is exactly the same as that of the conventional device.

In the residual water removing device for the threaded portion of the steel pipe constructed as described above, the hot air produced by the hot air generating device 2 passes through the hot air pipe 2 and is coupled from the opening 1a of the upper nozzle 1 to the coupling. 5 is sprayed on the internal screw portion 5a. Opening 1a
As shown in FIG. 2 (a), the upper nozzle 1 is provided separately on the left and right sides of the upper surface, and the hot air blown from this is along the inner circumference of the coupling 5 as shown by the arrow A in FIG. To the lower part to collect the water droplets adhering to the inner periphery to the lower part and also to dry the water film left on the inner peripheral surface. Further, the water collected in the lower part of the inner circumference of the coupling 5 is sucked through the opening 3a of the lower nozzle 3 to be sucked into the suction pipe 4a.
Through the suction blower 4 and completely removed.

At this time, as shown in FIG. 2, if the opening 1a of the upper nozzle 1 and the opening 3a of the lower nozzle 3 are slit type elongated in the length direction of the screw joint, respectively, the entire length of the screw joint is obtained. It is possible to temporarily dry and remove residual water.

[0012]

As described above, the present invention is provided with an upper nozzle that blows warm air on the upper part of a steel pipe inner screw or a screw joint drying nozzle for a steel pipe, and a lower nozzle that sucks residual water on the lower part, thereby providing a coupling. It is possible to completely remove the residual water inside and to dry the water film remaining on the entire surface.

[Brief description of drawings]

FIG. 1 is a side view showing the overall configuration of an embodiment of the present invention.

2A and 2B are detailed views of an embodiment of the present invention, in which FIG. 2A is a plan view showing the upper surface of the upper nozzle, FIG. 2B is a side view showing the structure of the apparatus, and FIG. 2C is the lower surface of the lower nozzle. It is a bottom view.

FIG. 3 is a front view of an embodiment of the present invention inserted in a coupling.

FIG. 4 is a side view showing a configuration of a conventional screw joint drying nozzle for a steel pipe.

[Explanation of symbols]

 1 Upper Nozzle 1a Opening (Upper Nozzle) 2 Warm Air Generator 3 Lower Nozzle 3a Opening (Lower Nozzle) 4 Suction Blower 4a Suction Pipe 5 Coupling 5a Screw Part 6 Air Nozzle 7 Solenoid Valve 8 Steel Pipe 9 Air Pipe 10 Main Pipe 11 stand

Claims (2)

[Claims] 1. A residual water removing device for a threaded portion in a steel pipe, comprising an upper nozzle for blowing gas at an upper part and a lower nozzle for sucking residual water at a lower part. 2. The residual water removing device for a threaded portion in a steel pipe according to claim 1, wherein the openings of the upper nozzle and the lower nozzle are slit type elongated in the length direction of the steel pipe.