CN2804557Y

CN2804557Y - Rubber cup pipe blocking device

Info

Publication number: CN2804557Y
Application number: CN 200520018309
Authority: CN
Inventors: 冯颖; 彭国晟; 刘辉
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-04-29
Filing date: 2005-04-29
Publication date: 2006-08-09
Anticipated expiration: 2015-04-29

Abstract

The utility model provides a rubber cup pipeline plugging device. The utility model comprises a rubber cup and a plugging head, wherein a plugging rubber cup is fixed on the plugging head; the sealing surface of the rubber cup forms staircase-shaped annular bulges. The plugging head comprises a pressing plate body, a tension spring, a scraping plate bracket, a tension spring positioning pin, a roller, a rolling shaft, an iron pin baffle plate, a scraping plate and a positioning pin. With the rubber cup pipeline plugging device of the utility model, not only is the problem that wrinkles are generated because of the nonuniform stress of a sealing layer after the plugging rubber cup enters a pipeline solved, but also the problem of the edge cutting of the plugging rubber cup after the plugging rubber cup enters the pipeline is solved, and the problem that an iron pin is clamped between the rubber cup and the inner wall of the pipeline is solved; because the problems are solved, the sealing performance of the pipeline is improved. The utility model is used for shortening construction operation time on sites and improving work efficiency.

Description

A kind of leather cup formula pipe plugging device

Technical field

The utility model relates to the pipe plugging device, relates in particular to a kind of leather cup formula pipe plugging device.

Background technique

In order to satisfy the needs of long-range conveying, media such as oil, rock gas, liquid gas and coal gas are generally transported in fields such as petrochemical industry, gas industry by pipeline.Under the effect of self corrosion or artificial and external force etc., conveyance conduit can leak.In case leak, must carry out the mending-leakage repairing to pipeline timely, when repairing, need carry out the perforate shutoff to pipeline.When pipeline is carried out shutoff, adopted external leather cup formula pipe plugging device at present, as shown in Figure 1, leather cup formula pipe plugging device comprises shutoff leather cup 11 and block head 12, block head 12 comprises pressing plate body 31 as shown in Figure 3, extension spring 32, roller 33, roller bearing 34 and extension spring locating stud 35, pressing plate body 31 comprises base plate and gusset, its base plate is round table-like, the bottom surface of base plate is stuck in the shutoff leather cup, with screw the two is fixed together, gusset is roughly triangle, be welded on the center line of base plate upper bottom surface, the bottom surface of gusset is opened a U-shaped groove, and perforate on groove two walls is fixed on roller 33 on the groove by roller bearing 34, bore a hole in the back upper place of groove, extension spring locating stud 35 is connected on by this eyelet welding on the gusset of pressing plate body 31, and extension spring 32 1 ends are fixed on the extension spring locating stud 35, and the other end is fixed on the roller 33.Shutoff leather cup 11 and block head 12 are fixed on the bent plate 14 together, and bent plate 14 is shipped and resell on another market by connection and 15 is flexibly connected with support plate 13.Bent plate 14 drives shutoff leather cups 11 and block head 12, and to ship and resell on another market 15 be that the center centers on support plate 13 and rotates to be connected together, so that blocking device can enter by blocking pipe smoothly.This leather cup formula pipe plugging device is applicable to seamless steel pipe made in Great Britain, and is not fully up to expectations for the plugging effect of the spiral-selded pipe of metric system.

The pipeline of the present domestic overwhelming majority all is the metric system spiral-selded pipe that adopts, and the ovality of this pipeline and the degree of finish of inner-walls of duct are all very poor, and in there is a spiral at spiral weld inwall place recessed joint.Before existing shutoff leather cup enters pipeline, as shown in Figure 5, its sealing surface 51 is tapered planes, enter pipeline after because sealing surface is that whole plane is all stressed, be subjected to the influence of pipeline ovality, the sealing surface unbalance stress of leather cup, whole sealing surface produces fold, as shown in Figure 6, cause the leakage of medium like this, had a strong impact on the effect of sealing.

When pipeline is carried out the perforate shutoff, field by using is that the external cutter of producing carries out perforate to pipeline at present, because the external diameter of the boring cutter that is adopted makes boring cutter after perforate less than internal diameter of the pipeline, can stay the sharp circular arc limit of twice on the pipeline, as shown in Figure 8, after the shutoff leather cup enters pipeline, just cut out the twice deep cut by the sharp circular arc limit 81 of these twice, when shutoff, pipeline internal medium flows out by the otch that the leather cup both sides cut out, and 82 is by the pipeline of shutoff.In order to prevent the dielectric leakage in the pipeline, in the reality after pipeline is carried out perforate, adopt a kind of barrel pipeline that expands to carry out shutoff to opening, adopt this mode shutoff, need increase the activity duration of site operation to the whole cut-out of pipeline so greatly, not only cause the reduction of working efficiency, and there is potential safety hazard in this long operation meeting, and performance is extremely unstable.

After pipeline is carried out perforate, can produce the iron pin, stockpile on the inwall of pipeline, adopt existing leather cup formula pipe plugging device, carry out shutoff, the iron pin remains in the middle of inner-walls of duct and the leather cup, form the slit, the medium in the pipe can flow out from the slit, and sealing effect is very undesirable.

Because side cut, fold, the iron pin of shutoff leather cup remain between leather cup and the inner-walls of duct and the existence of the problems such as difference of metric system and pipeline made in Great Britain, cause the sealing effect of currently used this leather cup formula pipe plugging device bad.

Summary of the invention

The purpose of this utility model provides a kind of leather cup formula pipe plugging device, solves the shutoff leather cup and produce the problem of fold when entering pipeline and carry out shutoff, thereby improved the seal for pipe joints effect.

To achieve these goals, a kind of leather cup formula pipe plugging device that the utility model proposes, comprise shutoff leather cup and block head, the stepped annular protrusion of the sealing surface of shutoff leather cup, wherein block head comprises pressing plate body 31, extension spring 32, roller 33, roller bearing 34, extension spring locating stud 35, also comprises scraper stent 41, iron pin baffle plate 42, scraper plate 43, locating stud 44.Scraper stent 41 and roller 33 are fixed on the groove by roller bearing 34 together, and scraper plate 43 and iron pin baffle plate 42 are screwed on scraper stent 41 is exposed at projection outside the groove.Locating stud 44 is fixed on the gusset, is positioned at base plate one side of roller bearing near pressing plate body 31, is used for when iron pin baffle plate leaves inner-walls of duct scraper stent being fixed.

Adopt leather cup formula pipe plugging device described in the utility model, not only having solved the shutoff leather cup enters behind the pipeline because the sealing surface unbalance stress produces the problem of fold, solved the side cut problem that the shutoff leather cup enters pipeline, but also solved the problem of shim pin between leather cup and the inner-walls of duct, the solution of the problems referred to above, improve the sealing effect of pipeline, and adopted this device to shorten the construction operation time of site widely, improved working efficiency.

Description of drawings

Fig. 1 is for having the schematic representation after leather cup formula pipe plugging device enters pipeline now;

Fig. 2 is the schematic representation after the utility model leather cup formula pipe plugging device enters pipeline;

Fig. 3 is the structural representation of block head shown in Figure 1;

Fig. 4 is the structural representation of block head shown in Figure 2;

Fig. 5 is the generalized section of leather cup shown in Figure 1;

Fig. 6 is the schematic representation that the sealing surface unbalance stress of leather cup shown in Figure 5 produces fold;

Fig. 7 is the generalized section of leather cup shown in Figure 2;

Fig. 8 produces the schematic representation of cutting edge for existing leather cup enters pipeline;

Fig. 9 enters schematic representation behind the pipeline for the utility model leather cup;

Figure 10 is the structural representation of scraper plate shown in Figure 4.

Embodiment

Below in conjunction with the drawings and specific embodiments the utility model is done further specific description.

Be illustrated in figure 2 as the schematic representation after a kind of leather cup formula pipe plugging device that the utility model proposes enters pipeline, 21 for iron pin baffle plate 1,22 for iron pin baffle plate 2,23 for the position that scanned out the iron pin, 24 for shutoff leather cup of the present utility model, 25 for block head of the present utility model, bent plate 14 by connection ship and resell on another market 15 with support plate 13 flexible connections.Bent plate 14 drives shutoff leather cups 24 and block head 25, and to ship and resell on another market 15 be that the center centers on support plate 13 and rotates to be connected together, so that blocking device can enter by blocking pipe smoothly.When blocking device enters pipeline, at first iron pin baffle plate 121 iron pin that perforate is stayed is to left translation, along with blocking device continue move down, iron pin baffle plate 121 moved behind the segment distance, when iron pin baffle plate 121 leaves inner-walls of duct fully, then iron pin baffle plate 222 is started working, the iron pin is continued to left translation, the iron pin is pushed away out the sealing surface of leather cup, and iron pin baffle plate 222 has also left inner-walls of duct, and the iron pin is pulled to 23 position, iron pin between shutoff leather cup and the pipeline has been eliminated, shutoff leather cup and internal diameter of the pipeline coincide, and the medium in the pipe can not leak, and has strengthened the sealing effect of pipeline.

Distance between iron pin baffle plate 1 and the iron pin baffle plate 2 can remain between the 70mm-100mm.Scraper plate uses the material material softer than pipeline, all can remove the iron pin that remains on the inner-walls of duct, such as materials such as rubber, wood, hair are sticking.The internal diameter of iron pin baffle plate and pipeline matches.

In the leather cup formula pipe plugging device that the utility model proposes as shown in Figure 4, the structural representation of block head, pressing plate body 31, extension spring 32, roller 33, roller bearing 34, extension spring locating stud 35 also comprise scraper stent 41, iron pin baffle plate 42, scraper plate 43, locating stud 44.Scraper stent 41 and roller 33 are fixed on the U-shaped groove by roller bearing 34 together, scraper plate 43 and iron pin baffle plate 42 are screwed on scraper stent 41 is exposed at projection outside the groove, be the structural representation of scraper plate as shown in figure 10, the structure of iron pin baffle plate and scraper plate is the same, in the sidetracking hole of roller bearing near the base plate of pressing plate body 31, be fixed on the gusset by this hole locating stud 44, when iron pin baffle plate when inner-walls of duct is removed the work of iron pin, locating stud contracts in the hole, along with moving down of block head, finish when the removing work of iron pin baffle plate in pipeline and to leave pipeline, locating stud ejects in the hole, and scraper stent is fixed.

Be illustrated in figure 6 as existing leather cup and enter pipeline, because the sealing surface unbalance stress produces the schematic representation of fold, wherein 61 be pipeline, and 62 for entering the leather cup behind the pipeline, 63 leather cup folds for amplification, and fold has produced the slit, causes the leakage of medium.

Be illustrated in figure 7 as the generalized section of the utility model leather cup, 71 is the sealing surface of leather cup, stepped annular protrusion, the number of projection can be 3-8, the shape of projection can be carried out shutoff when blocking device enters pipeline for shapes such as circle, triangle, rectangles on the sealing surface, and the whole sealing surface of leather cup is all stressed, be equivalent to seal ring and in pipeline, seal, prevent dielectric leakage.

When pipeline is carried out perforate, the utility model adopts improved boring cutter that pipeline is carried out perforate, the external diameter of improved boring cutter equates with the external diameter of pipeline, internal diameter is less than the internal diameter of pipeline, upper half part of pipeline just is cut off like this, can not stay sharp circular arc limit again, when blocking device enters pipeline, can not cut edge, Fig. 9 is for adopting the schematic representation after leather cup described in the utility model enters pipeline.

Claims

1, a kind of leather cup formula pipe plugging device comprises shutoff leather cup and block head, and wherein block head comprises, pressing plate body (31), extension spring (32), roller (33), roller bearing (34), extension spring locating stud (35);

It is characterized in that: the annular protrusion that the sealing surface of described shutoff leather cup is stepped.

2, device according to claim 1 is characterized in that, described projection can be 3-8.

3, device according to claim 1 and 2 is characterized in that, described block head also comprises scraper stent (41), iron pin baffle plate (42), scraper plate (43), locating stud (44);

Scraper stent (41) and roller (33) are fixed on the groove by roller bearing (34) together, iron pin baffle plate (42) and scraper plate (43) are screwed onto scraper stent (41) and are exposed on the outer projection of groove, iron pin baffle plate (42) and scraper plate (43) link together with screw, locating stud (44) is fixed on the gusset, is positioned at base plate one side of roller bearing near the pressing plate body.

4, device according to claim 3 is characterized in that, the distance between the described iron pin baffle plate is 70mm-100mm.

5, device according to claim 3 is characterized in that, the material that described scraper plate adopts is softer than the material that pipeline adopts.