CN212617032U

CN212617032U - Cast iron pipeline water-closing test tool

Info

Publication number: CN212617032U
Application number: CN202021498458.1U
Authority: CN
Inventors: 牛宗志; 张金强; 姬鹏; 王娜; 刘允; 李有才
Original assignee: Sinopec Tenth Construction Co Ltd
Current assignee: Sinopec Tenth Construction Co Ltd
Priority date: 2020-07-24
Filing date: 2020-07-24
Publication date: 2021-02-26
Anticipated expiration: 2030-07-24

Abstract

The utility model relates to a cast iron pipeline water-closing test tool, belonging to the technical field of pipeline detection, which comprises a first connecting plate and a second connecting plate; the second connecting plate is sleeved on the outer surface of the cast iron pipeline and is detachably connected with the cast iron pipeline; the first connecting plate is connected with a breather pipe, and the first connecting plate is connected with the second connecting plate in a sealing manner. Compared with other plugging methods, the water closing test tool disclosed by the utility model improves the efficiency, reduces the construction time and reduces the cost; meanwhile, the structure is simple, the occupied space is small, and the device is suitable for various field environments, particularly limited spaces; the device has light weight, convenient movement, repeated use and good economy.

Description

Cast iron pipeline water-closing test tool

Technical Field

The utility model belongs to the technical field of the pipeline detects, specifically a cast iron pipeline water shutoff test frock has been related to.

Background

The statements herein merely provide background related to the present disclosure and may not necessarily constitute prior art.

Most of petrochemical engineering water supply and drainage pipelines are cast iron pipelines, and after the cast iron pipelines are installed, a water closing test needs to be carried out on the cast iron pipelines so as to confirm that the tightness of the installed cast iron pipelines meets the design requirements. In order to realize the test process, the cast iron pipeline is ensured to be free of leakage, but the problems that the plugging device is difficult to install and too much time is consumed in dismantling construction in the pressure test process of the cast iron pipeline exist in the existing water closing test.

SUMMERY OF THE UTILITY MODEL

In order to solve the defects existing in the prior art, the utility model aims to provide a cast iron pipeline water-closing test tool. This pipeline chucking frock does not need external flange. The outer wall of the cast iron pipeline is clamped as a friction surface, an outer side blind flange of the tool is clamped through friction force, and the pipeline and the tool are combined into a whole so as to achieve the purpose of sealing the pipeline and further testing the tightness of the pipeline.

In order to achieve the above purpose, the present invention is realized by the following technical solution:

the utility model discloses a water-closing test tool for cast iron pipelines, which comprises a first connecting plate and a second connecting plate; the second connecting plate is sleeved on the outer surface of the cast iron pipeline and is detachably connected with the cast iron pipeline; the first connecting plate is connected with a breather pipe, and the first connecting plate is connected with the second connecting plate in a sealing manner.

Furthermore, the central position of first connecting plate sets up the air vent, and the breather pipe is connected to one side that second connecting plate was kept away from to first connecting plate, and the tip and the air vent of breather pipe are linked together.

Furthermore, a sealing gasket is arranged on one surface where the first connecting plate and the second connecting plate are combined.

Further, the first connecting plate and the second connecting plate are respectively provided with a first reserved bolt hole at the same position in the circumferential direction.

Furthermore, a second connecting plate is fixed on the outer surface of the cast iron pipeline through a hoop, and the second connecting plate and the hoop are welded together.

Further, the second connecting plate and the hoop can also be integrated.

Furthermore, the second connecting plate is composed of two semicircular plates, and each semicircular hoop is connected with one semicircular hoop respectively.

Furthermore, a combination plate is connected to the two ends of the semicircular hoop in the length direction respectively, and a second reserved bolt hole is formed in the combination plate.

Further, the second connecting plate is fixed at a position 10mm away from the cast iron pipe head.

Compared with the prior art, the utility model has the advantages and positive effect be:

(1) the utility model discloses a field operation environment and operating cost have fully been considered to the chucking frock, and its simple structure, not heavy are applicable to on-the-spot cast iron pipeline and close experimental shutoff. Through the second connecting plate that relies on the frictional force suit to fix on cast iron pipeline outer wall face, can dismantle the connection with the sealed first connecting plate that has the breather pipe, it is more convenient than blind plate shutoff dismantlement in the past, have practical strong, should operate, can use repeatedly, characteristics such as efficient effectively solve cast iron pipeline pressure testing process plugging device installation difficulty and demolish the too much problem of being under construction consuming time.

(2) The utility model discloses a chucking frock has considered the pressure testing frock and can bear suitable pressure and keep indeformable, do not slide according to on-the-spot actual operation space and field operation condition. The pipeline clamping tool is simple to manufacture, convenient to install and disassemble, high in utilization rate and easy to manufacture at present, and is suitable for being applied to construction sites of construction units.

Drawings

The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without unduly limiting the scope of the invention.

Fig. 1 is a schematic structural view of a water shut-off test tool for a cast iron pipeline provided by an embodiment of the invention;

in the figure: 1. breather pipe, 2, blind flange, 3, movable flange, 4, connecting plate, 5, staple bolt, 6, reservation bolt hole, 7, second reservation bolt hole.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

For convenience of description, the words "upper", "lower", "left" and "right" in the present application, if any, merely indicate correspondence with the upper, lower, left and right directions of the drawings themselves, and do not limit the structure, but merely facilitate the description of the present invention and simplify the description, rather than indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

As shown in fig. 1, the cast iron pipeline water shut-off test fixture disclosed in this embodiment mainly includes two parts, namely a blind flange 2 and a movable flange 3, wherein the blind flange 2 and the movable flange 3 are both circular plates, and the diameters of the blind flange 2 and the movable flange 3 are the same.

The movable flange 3 in this embodiment is sleeved on the outer surface of the cast iron pipeline, the movable flange 3 is arranged on the anchor ear 5, and the movable flange is mainly formed by connecting two semicircular plates, and each semicircular plate is connected with a semicircular anchor ear.

The semicircular anchor ear is obtained by bending a rectangular steel plate strip into a semicircular body with the same diameter as that of the cast iron pipeline, and then welding the movable flange on the anchor ear.

Of course, in other embodiments, the movable flange may be integrated with the anchor ear.

Furthermore, two ends of the semicircular hoop in the length direction are respectively connected with a connecting plate 4, and the connecting plates 4 are provided with second reserved bolt holes 7, so that the connecting plates at the two ends are combined together and then fixed together through bolts, the hoop 5 can be fixed on the outer surface of the cast iron pipeline, and meanwhile, the friction force between the hoop 5 and the outer surface of the pipeline can be improved by increasing the pretightening force of the bolts.

Furthermore, the center position of the blind flange 2 is provided with an air vent, one side of the blind flange is connected with an air vent pipe 1, and the end part of the air vent pipe 1 is communicated with the air vent on the blind flange.

In order to realize the connection of the blind flange and the movable flange, a first reserved bolt hole 6 is arranged in the circumferential direction of the blind flange and the movable flange, so that the blind flange and the movable flange can be connected through bolts.

The pipeline clamping tool disclosed by the embodiment does not need an external connecting flange. The outer wall of the cast iron pipeline is clamped as a friction surface, an outer side blind flange of the tool is clamped through friction force, and the pipeline and the tool are combined into a whole so as to achieve the purpose of sealing the pipeline and further testing the tightness of the pipeline. Respectively determining the specifications of the water closing test tool according to the cast iron pipelines with different pipe diameters; the water-closing test is different from the pressure test, and the tool can be firmly attached to the cast iron pipe. The water-closing test tool is simple to manufacture, and can utilize the existing excess materials and waste materials on the site.

Therefore, the plugging tool for the water closing test of the cast iron pipeline, provided by the embodiment, has strong practicability and is easy to operate, and compared with other plugging methods, the efficiency is improved, the construction time is shortened, and the cost is reduced; meanwhile, the structure is simple, the occupied space is small, and the device is suitable for various field environments, particularly limited spaces; the device has light weight, convenient movement, repeated use and good economy. Meanwhile, the fixture can realize the segmental installation and the segmental backfill of the cast iron pipe, and has positive promotion effects on the aspects of on-site civilized construction, quality control, shortening of the construction period and the like. Especially, the cast iron pipeline without well construction conditions has more obvious use effect.

Before the water-closing experiment of the cast iron pipeline, firstly fixing a combined flange (a combination of a movable flange, a hoop and a connecting plate) to a position 10mm away from the head of the cast iron pipeline; screwing bolts for connecting the combined flanges, and knocking the combined flanges by using a 1kg hand hammer for inspection, wherein the combined flanges are qualified as not sliding; cutting and processing the rubber gasket according to the pipe diameter of the cast iron pipe; connecting and screwing a flange cover with an air pipe and a processed rubber gasket with a combined flange fixed on the cast iron pipe through bolts; the installation of the water closing test tool is completed, and the water closing test tool has a water injection condition.

The working principle is as follows:

2 semicircular movable flanges are tightly pressed on the outer pipe wall of the cast iron pipeline through 4 sets of bolts; then connecting the blind flange plate and the assembled movable flange into a whole by using bolts arranged in the circumferential direction, and adding a rubber pad between the blind flange plate and the movable flange as pipe orifice plugging seal; the friction force generated between the fastened movable flange and the outer pipe wall offsets the internal pressure borne by the tool after the pipe is filled with water, so that the stability of the tool is ensured, and the tool and the pipe orifice joint are ensured to have no leakage.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Although the present invention has been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without inventive work are still within the scope of the present invention.

Claims

1. A water closing test tool for a cast iron pipeline is characterized by comprising a first connecting plate and a second connecting plate; the second connecting plate is sleeved on the outer surface of the cast iron pipeline and is detachably connected with the cast iron pipeline; the first connecting plate is connected with a breather pipe, and the first connecting plate is connected with the second connecting plate in a sealing manner.

2. The water shut-off test tool for the cast iron pipeline as claimed in claim 1, wherein a vent hole is formed in the center of the first connecting plate, a vent pipe is connected to one side of the first connecting plate, which is far away from the second connecting plate, and the end of the vent pipe is communicated with the vent hole.

3. The water shut-off test fixture for cast iron pipelines as claimed in claim 1, wherein a gasket is arranged on one surface of the first connecting plate, which is combined with the second connecting plate.

4. The water shutoff test fixture for the cast iron pipeline as claimed in claim 1, wherein the first connecting plate and the second connecting plate are respectively provided with first reserved bolt holes at the same positions in the circumferential direction.

5. The water shut-off test fixture for the cast iron pipeline as claimed in claim 1, wherein the second connecting plate is fixed on the outer surface of the cast iron pipeline through an anchor ear, and the second connecting plate and the anchor ear are welded together.

6. The water shutoff test fixture for cast iron pipelines as claimed in claim 5, wherein the second connecting plate and the anchor ear are also integrated.

7. The water shut-off test fixture for cast iron pipelines as claimed in claim 5, wherein the second connecting plate is composed of two semicircular plates, and each semicircular hoop is connected with one semicircular hoop.

8. The water shutoff test tool for the cast iron pipeline as claimed in claim 7, wherein two ends of the semicircular anchor ear in the length direction are respectively connected with a combination plate, and the combination plates are provided with second reserved bolt holes.

9. The water shutoff test tool for the cast iron pipe as claimed in claim 1, wherein the second connecting plate is fixed at a position 10mm away from the head of the cast iron pipe.

10. The water shut-off test fixture for cast iron pipelines as claimed in claim 1, wherein the first connecting plate and the second connecting plate are circular plates, and the diameters of the first connecting plate and the second connecting plate are the same.