CN101644620B - Module small- channel hydraulic pressure expansion plug device - Google Patents

Abstract

This invention relates to a modular small manifold hydrostatic expansion plug device, comprising a clamping bolt, a clamping nut, a tightening bolt, a tightening nut, a washer, a support plate, a sealing ring, a stop block, and a limiting nut. The bent section of the clamping bolt fits onto the small manifold, and the straight threaded section of the clamping bolt extends upward through the support plate and is tightened with the clamping nut. The tightening bolt is inserted into the mounting hole of the support plate. A limiting nut is provided at the bottom end of the tightening bolt. A stop block is fitted onto the tightening bolt above the limiting nut, and a sealing ring is fitted onto the tightening bolt above the stop block. A washer is fitted onto the tightening bolt above the support plate, and a tightening nut is screwed onto the tightening bolt above the washer. This invention ensures that the small manifold pipe joint cap and the pipe joint are tightly pressed together while retaining the sealing ring structure of the pipe joint. This allows for a faster and more efficient hydrostatic test, saving on the difficulties of processing the small manifold pipe joint after hydrostatic testing and shortening the manufacturing time.

Description

Modular small header water pressure expansion plug device

technical field

The invention relates to a hydraulic test tool, in particular to a modular small header hydraulic expansion plug device, which belongs to the technical field of hydraulic test equipment.

Background technique

The hydraulic test tool for internal expansion plug is an indispensable tool in the manufacturing process of pressure-bearing parts such as boiler coiled tubes. Press down, tightly bite the inner wall of the pipe, and tightly seal the sealing ring and the inner wall of the pipe, then enter the water through the water inlet, go through the stages of boosting and stabilizing the pressure until the hydraulic test is completed. In the past, the water pressure test of the small header required to release the water pressure allowance on the pipe joint, and weld the end cover and pipe joint. After the water test, it was necessary to cut the allowance, chamfer and other metal processing.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies in the prior art, to provide a small header pipe joint gland and pipe joint compression, and retain the sealing ring structure of the pipe joint, so that the hydraulic test can be carried out quickly It is a modular small header water pressure expansion plug device that is good, can save the difficulty of processing the small header pipe joint after hydraulic pressure, and shorten the manufacturing time.

According to the technical solution provided by the present invention, the hydraulic expansion plug device of the modular small header includes a tightening bolt, a tightening nut, a tightening bolt, a tightening nut, a washer, a support plate, a sealing ring, a stopper and a limit nut , the curved section of the holding bolt is set on the small header, the threaded straight section of the holding bolt goes out of the supporting plate upwards and is tightened with the holding nut, the tightening bolt is inserted into the mounting hole of the supporting plate, and there is a limiter at the bottom of the tightening bolt A position nut, a stopper is sleeved on the tightening bolt at the upper end of the limit nut, a sealing ring is sleeved on the tightening bolt at the upper end of the stopper, a washer is sleeved on the tightening bolt at the upper end of the support plate, and a screw connection is made on the tightening bolt above the washer Tighten the nuts.

The invention presses the gland of the pipe joint of the small header tightly with the pipe joint, and retains the structure of the sealing ring of the pipe joint, so that the hydraulic test can be carried out quickly and well, and the processing time of the small header pipe joint after the hydraulic pressure is saved. Difficulty, shorten manufacturing time.

Description of drawings

Fig. 1 is a front view of the present invention.

Fig. 2 is a left side view of the present invention.

Detailed ways

The present invention will be further described below in conjunction with specific drawings and embodiments.

As shown in the figure, the present invention is mainly composed of holding bolt 1, holding nut 2, tightening bolt 3, tightening nut 4, washer 5, supporting plate 6, sealing ring 7, stopper 8 and limit nut 9 and so on.

The modular small header hydraulic expansion plug device includes a tightening bolt 1, a tightening nut 2, a tightening bolt 3, a tightening nut 4, a washer 5, a support plate 6, a sealing ring 7, a stopper 8 and a limit nut 9 , the curved section of the holding bolt 1 is set on the small header, the threaded straight section of the holding bolt 1 passes through the support plate 6 upwards and tightened with the holding nut 2, and the tightening bolt 3 is inserted into the mounting hole of the support plate 6, and then tightened The bottom end of the bolt 3 is provided with a limit nut 9, and a stopper 8 is sleeved on the tightening bolt 3 at the upper end of the limit nut 9, and three sealing rings 7 are sleeved on the tightening bolt 3 at the upper end of the stopper 8. A washer 5 is sleeved on the tightening bolt 3 of the washer 5, and a tightening nut 4 is screwed on the tightening bolt 3 above the washer 5.

When working, the bent end of the U-shaped holding bolt 1 is set on the small header, and the other end passes through the support plate 6 and is tightened with the M12 holding nut 2, and at the same time, the stopper 8 and the high-pressure sealing ring 7 are tightened on the pipe joint Inside, when tightening the tightening nut 4, it is necessary to ensure that the four tightening nuts 2 are evenly stressed. Tighten the tightening nut 4 to expand the high-pressure sealing ring 7 and the pipe joint. Then the pipe body is connected to the water inlet, and after being filled with water, the pressure is slowly increased to the hydraulic test pressure. After the pressure is stabilized for 1 minute, the pressure does not drop, that is, the hydraulic test is successful. Slowly release the pressure to zero and then release the water to complete the hydraulic pressure test. The whole process of the test.

Claims (1)

1. A hydraulic expansion plug device for modular small headers, characterized in that it includes holding bolts (1), holding nuts (2), tightening bolts (3), tightening nuts (4), and washers (5) , support plate (6), sealing ring (7), block (8) and limit nut (9), the bent section of the holding bolt (1) is set on the small header, and the thread of the holding bolt (1) The straight section passes through the supporting plate (6) upwards and is tightened with the holding nut (2), the tightening bolt (3) is inserted into the mounting hole of the supporting plate (6), and a limit nut (9) is arranged at the bottom of the tightening bolt (3) ), the stopper (8) is sleeved on the tightening bolt (3) at the upper end of the limit nut (9), and the sealing ring (7) is sleeved on the tightening bolt (3) at the upper end of the stopper (8). (6) The tightening bolt (3) at the upper end is sleeved with a washer (5), and the tightening bolt (3) above the washer (5) is screwed with a tightening nut (4).

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