CN200979053Y

CN200979053Y - Self-expansion type pressure testing plugging device

Info

Publication number: CN200979053Y
Application number: CN 200620093672
Authority: CN
Inventors: 周慨; 刘俊鹏; 周少明
Original assignee: Bohai Shipbuilding Heavy Industry Co Ltd
Current assignee: Bohai Shipyard Group Co Ltd
Priority date: 2006-10-17
Filing date: 2006-10-17
Publication date: 2007-11-21
Anticipated expiration: 2016-10-17

Abstract

A group of self expansion pressure testing plugging device is formed of a self expansion plugging and a self expansion air inlet plugging wherein the self expansion plugging comprises an expansion bar, an expansion sleeve, an apical plate, a nut, an O shaped sealing ring, a sealing plate, a sealing outer nut and a pad. Put the expansion bar inside the pressure testing pipe mouth, then orderly put the expansion sleeve and the top plate, the nut on the tight expansion bar holds the apical plate to the expansion sleeve, the expansion sleeve grows on the effect of a cone head on the expansion bar and is fixed on the inner wall of the pipe mouth, the sealing plate equipped with the O shaped sealing ring and the pad are orderly sleeve equipped on the expansion bar and are equipped on the pipe mouth, and the tight sealing outer nut is pressed on the pad for sealing, which forms a self expansion plugging. The structure of the self expansion air inlet plugging is nearly the same with that of the self expansion plugging, and the difference is that the expansion bar and the sealing outer nut are respectively equipped with an air inlet hole and a bulge air inlet hole. The self expansion air inlet plugging and the self expansion plugging respectively plug the pipe mouths on two ends of the pressure testing pipe. The device can prevent bulge leakage, with the advantages of simple manipulation, quick equipment and detachment, and being able to increase working efficiency.

Description

One group of self-inflated pressure testing blocking device

Technical field

The utility model relates to pipe and suppresses blocking device, particularly be at one group of self-inflated pressure testing blocking device of the line seal test of tape welding joint chair plate or flange weldment not.

Background technique

In the shipbuilding process, the guard system seal tightness test be one extremely important and use and to work extremely widely.When carrying out pipe bulge test sealing in the past, often run into the situation that to carry out shutoff to not tape welding joint chair plate or not flanged (FLGD) weldment mouth of pipe, this structural traps are difficulty relatively, can only adopt the method shutoff that hammers into stopper, be that the taper stopper is driven in the weldment opening or the mouth of pipe, but because stopper can only use once, and because the accumulation of error of pipe fitting processing, manufacturing, make that the sealing effect of stopper is undesirable, particularly under the high situation of pressure, more can not satisfy sealing shutoff requirement.

Summary of the invention

The technical problems to be solved in the utility model provides a kind of pipe that prevents and suppresses leakage, and simple to operate, installing/dismounting is quick, one group of self-inflated pressure testing blocking device can increasing work efficiency.

The technological scheme that adopts is:

One group of self-inflated pressure testing blocking device, but one group of self-inflated pressure testing blocking device forming by self-inflated shutoff and self-inflated air inlet shutoff.Described self-inflated shutoff, comprise expansion rod, expansion sleeve, top board, nut, O RunddichtringO, sealing plate, hermetically sealed case nut, pad.Its bar portion of expansion rod is a threaded stem, its termination portion is a taper, expansion sleeve one end endoporus is set as taper and expansion rod termination taper is complementary, expansion rod is put into the pipe mouth of pipe of pressure testing, put into expansion sleeve again, top board is installed on the expansion rod, the nut spinning is on expansion rod, screwing nut pushes up on the expansion sleeve top board, expansion sleeve is fixed on the mouth of pipe inwall bulging under the effect of expansion rod cone-shaped end, the sealing plate of O RunddichtringO and pad is housed is installed on expansion rod successively and places on the mouth of pipe, and hermetically sealed case nut spinning is on expansion rod, and screw and be pressed on the pad, constitute the self-inflated shutoff.But self-inflated air inlet shutoff, its structure and self-inflated plugging structure are basic identical, are not both: expansion rod and hermetically sealed case nut are established inlet hole in respectively and are suppressed inlet hole and hermetically sealed case nut one end peripheral hardware screw thread also.But constitute one group self-inflated shutoff and self-inflated air inlet shutoff respectively shutoff at mouth of pipe place, pipeline two ends, but the hermetically sealed case nut of self-inflated air inlet shutoff with suppress the suction tude joint screw thread and be connected, constituted one group of self-inflated pressure testing blocking device.

The utility model prevents that effectively pipe from suppressing leakage, and it is little, simple to operate to have a volume, and installing/dismounting is quick, the advantage of high working efficiency.

Description of drawings

Fig. 1 is the utility model embodiment's a structural representation.

Embodiment

One group of self-inflated pressure testing blocking device, but one group of self-inflated pressure testing blocking device forming by self-inflated shutoff 1 and self-inflated air inlet shutoff 2.But self-inflated shutoff 1 and self-inflated air inlet shutoff 2 difference shutoff are at mouth of pipe place, pipe 3 two ends, but self-inflated shutoff 1 and self-inflated air inlet shutoff 2 structures are basic identical, include expansion rod 4, expansion sleeve 5, top board 6, nut 7, O RunddichtringO 8, sealing plate 9, hermetically sealed case nut 10, pad 11, but different be that the expansion rod of self-inflated air inlet shutoff 2 and hermetically sealed case nut are established inlet hole 12 in respectively and suppressed inlet hole 13 and hermetically sealed case nut one end peripheral hardware screw thread 14 also.Described expansion rod 4 its bar portions are threaded stem, its termination portion is a taper, described expansion sleeve 5 one end endoporus are set as taper and expansion rod 4 termination tapers are complementary, when shutoff is installed, earlier expansion rod 4 is put into the mouth of pipe of pressure testing, put into expansion sleeve 5 again, top board 6 is installed on the expansion rod 4, nut 7 spinnings are on expansion rod 4, screwing nut 7 pushes up on the expansion sleeve 5 top board 6, move behind the expansion rod 4, tapered portion slowly bulges expansion sleeve 5 until firmly being fixed on the mouth of pipe inwall, the sealing plate 9 of O RunddichtringO 8 and pad 11 is housed is installed on expansion rod 4 successively and places on the mouth of pipe, and hermetically sealed case nut 10 spinnings are on expansion rod 4, the screwing hermetic cap nut 10 once more, and the pressure in the pipe 3 is sealed up by O RunddichtringO 8 and pad 11.During pressure testing, but the hermetically sealed case nut of self-inflated air inlet shutoff 2 with suppress the suction tude joint screw thread and be connected, suppress gas and enter supercharging in the pipe 3, constitute one group of self-inflated pressure testing blocking device through the inlet hole of suppressing inlet hole 13 and expansion rod 12 of hermetically sealed case nut.

Claims

1, one group of self-inflated pressure testing blocking device, by self-inflated shutoff (1) but and one group of self-inflated pressure testing blocking device forming of self-inflated air inlet shutoff (2), it is characterized in that described self-inflated shutoff (1), comprise expansion rod (4), expansion sleeve (5), top board (6), nut (7), O RunddichtringO (8), sealing plate (9), hermetically sealed case nut (10), pad (11), its bar portion of expansion rod (4) is a threaded stem, its termination portion is a taper, described expansion sleeve (5) one end endoporus are set as taper and expansion rod (4) termination taper is complementary, expansion rod (4) is put into pipe (3) mouth of pipe of pressure testing, put into expansion sleeve (5) again, top board (6) is installed on the expansion rod (4), nut (7) spinning is on expansion rod (4), screwing nut (7) pushes up on the expansion sleeve (5) top board (6), expansion sleeve (5) bulges under the effect of expansion rod (4) cone-shaped end and is fixed on the mouth of pipe inwall, the sealing plate (9) of O RunddichtringO (8) and pad (11) are housed to be installed on expansion rod (4) successively and to place on the mouth of pipe, hermetically sealed case nut (10) spinning is on expansion rod (4), and screw and be pressed on the pad (11), constitute the self-inflated shutoff, but self-inflated air inlet shutoff (2), its structure and self-inflated shutoff (1) structure are basic identical, different is: expansion rod and hermetically sealed case nut are established inlet hole (12) in respectively and are suppressed inlet hole (13) and hermetically sealed case nut one end peripheral hardware screw thread (14) also, its peripheral hardware screw thread (14) when pressure testing with suppress the suction tude joint screw thread and be connected.