CN202041417U - Quick connector used in small diameter pipe pressure test - Google Patents

Abstract

The utility model relates to a quick connector for pressure testing of small-diameter pipelines, which comprises first and second components, wherein the front end of the first component has a cylinder connected to a gas supply source, and the rear end of the first component has a An inner cavity with an internal thread at the mouth, a hollow elastic packing body for the pipeline to be tested is installed in the inner cavity, and the front end of the first member is opened with a through hole axially penetrating the cylinder and communicating with the inner cavity; The front end of the second member has a stud threaded with the mouth of the inner cavity, and the second member has an axial hole for the pipe to be tested to extend into and pass through the stud to be opposite to the inner cavity. The second component is also disassembled and connected with a clamping body that hugs the pipeline to be tested to the second component. After adopting the above structure, during the pressure test, the connection between the small-diameter pipe and the gas source connection can be realized conveniently and quickly without welding, and the operation is convenient, the cost is low, and it can be used repeatedly, so it is especially suitable for production, engineering projects and Pressure testing of small bore pipes in equipment manufacturing.

Description

A quick coupler for pressure test of small diameter pipeline

technical field

The utility model relates to an interface device for connecting two pipelines, in particular to a quick interface device suitable for being connected to a gas source connecting pipe during a pressure test of a small-diameter pipeline to be tested.

Background technique

In order to ensure that the final product has sufficient strength and compactness, some welded pipes (such as stainless steel welded pipes for heat exchangers, fluid pipes, instrument pipes, electric heating pipes, etc.), regardless of the size of the caliber, require comprehensive inspection of the base material before use. Mechanical properties, chemical composition, physical and chemical indicators and eddy current testing, but also strict pressure tests one by one according to product requirements. The traditional pressure test method is: connect the nozzle of the pipeline to be tested with the nozzle of the gas source connection by welding in advance; then put the pipeline to be tested into the water tank; then pass high-pressure gas into the pipeline to be tested, Then observe the air bubbles in the water tank, and judge the quality of the pipe to be tested by the presence or absence of air bubbles. Although this welded pressure test interface method can also complete the rigorous inspection of the pipeline to be tested, this method is time-consuming, laborious, material-intensive, costly, and cannot be used repeatedly. At the same time, it cannot adapt to large quantities of pipelines of the same specification. Pressure test.

For this reason, the applicant once designed the "quick interface device for pressure test" as the Chinese patent authorization announcement number CN201628615U. This quick interface device does not need any auxiliary power and devices. The pipeline to be tested and the gas source connecting pipe can be easily assembled and disassembled, and the production is convenient, the cost is low, and it can be used repeatedly. Therefore, it overcomes the defects caused by the traditional welding fixing method.

However, the above-mentioned quick coupler for pressure testing can only be applied to large-diameter pipelines because of the internal tight structure. When encountering small-diameter pipes, especially pipes below φ12mm, it still needs to be fixed by welding. Therefore still await further improvement.

Utility model content

The technical problem to be solved by the utility model is to provide a quick interface device for pressure testing of small-diameter pipelines which is easy to operate, low in cost and can be used repeatedly.

The technical solution adopted by the utility model to solve the above-mentioned technical problems is: the quick interface device for small-diameter pipeline pressure test includes first and second components, and the feature is that: the front end of the first component has a gas supply source connecting pipe Connected cylinder, the rear end of the first member has an inner cavity with an internal thread at the mouth, and a hollow elastic packing body is installed in the inner cavity for the pipe to be tested to extend into. The front end of the first member There is a through hole axially penetrating through the cylinder and communicating with the inner cavity; the front end of the second member has a stud screwed with the mouth of the inner cavity, and the second member has a The pipe to be tested extends into and passes through the stud to the axial hole opposite to the above-mentioned inner cavity. At the same time, the second member is also disassembled and connected to the pipe to be tested on the second member. Clamping body.

As a further improvement of the present utility model, the rear end of the second member has a notch, and the clamping body is seated in the notch. And the clamping body is preferably designed as a hoop, correspondingly, lugs corresponding to both ends of the hoop extend from the outer walls on both sides of the second member, and each lug corresponds to a corresponding part of the hoop. The ends are connected by bolts, which is convenient for operation. Of course, the notch can also be provided in the middle of the second member, and the purpose of clamping the pipeline to be tested can also be achieved.

In order to facilitate the connection with the air source connection, the cylinder has external threads.

In each of the above solutions, the cross-sectional profile of the first and second components is designed as a regular hexagonal structure, which facilitates the use of conventional tools to pull the first and second components.

Compared with the prior art, when the utility model is in use, as long as the pipeline to be tested passes through the axial hole of the second component and extends into the elastic packing body, by rotating the second component, it is driven by screwing in the stud. The elastic packing body shrinks, so that the inner diameter of the elastic packing body shrinks and clings to the smooth outer wall of the pipe to be tested to play a sealing role; at the same time, the outer tight structure of the clamping body is used to tightly clamp the outer wall of the pipe to be tested, And it can also ensure that the elastic packing body will not move outward and slide out with the increase of pressure under a certain high pressure. Therefore, the utility model can conveniently and quickly realize the pressure test operation of small-diameter pipelines without welding, and is easy to operate, low in cost, and can be used repeatedly, so it is especially suitable for small-diameter pipelines in production, engineering projects and equipment manufacturing. stress test.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment;

Fig. 2 is the sectional view of Fig. 1;

FIG. 3 is a side view of FIG. 1 .

Detailed ways

The utility model is described in further detail below in conjunction with the accompanying drawings.

As shown in Figures 1 to 3, the quick connector for small-caliber pipeline pressure testing includes a first component 1, a second component 2 and a clamping body 3, wherein the section profile of the first component 1 is a regular hexagonal structure, so that In the rotation operation of conventional tools such as wrenches, the front end of the first member 1 has a cylinder 11 with external threads for connecting the air source connection; the rear end of the first member has an inner cavity 12, The inner wall of the mouth of the inner cavity is provided with an internal thread, and a hollow elastic packing body 4 is installed in the inner cavity, and the elastic packing body can be inserted into the pipe to be tested; the front end of the first member is also provided with an axial through The cylinder 11 and the through hole 13 communicating with the inner chamber 12, when the gas source is connected to the cylinder, the high pressure gas can enter the inner chamber 12 through the through hole 13.

The sectional profile of the aforementioned second member 2 also becomes a regular hexagonal structure, and the front end of the second member 2 has a stud 21 that is threadedly connected with the mouth of the above-mentioned inner cavity. The axial hole 22 opposite to the above-mentioned inner cavity has a gap 23 at the rear end of the second member. The pipe to be tested can extend into the axial hole 21 and can be inserted into the elastic packing body in the inner cavity 12 of the first member. 4 within.

The aforementioned clamping body 3 is located in the gap 23 of the above-mentioned second member. In this embodiment, the clamping body is a hoop. The corresponding lugs 24 are connected by bolts 5 between each lug and the corresponding end of the hoop.

During the pressure test, the cylinder of the first component is threadedly connected to the gas source connection, and the high-pressure gas source is connected through the gas source connection. The nozzle of the pipeline to be tested is inserted into the axial hole of the second component, and continues to extend into the first Inside the hollow elastic filler in the cavity of one component, then turn the second component so that the stud of the second component is screwed into the mouth of the cavity of the first component, and as the stud is continuously screwed in, the stud pushes the elastic filler , so that the inner diameter of the elastic packing body is reduced and clings to the smooth outer wall of the pipeline to be tested to play a sealing role. At the same time, the clamping body is wrapped around the pipeline to be tested, and the clamping body is fastened to the second On the two lugs of the component, the pipe to be tested is tightly connected to the second component to realize the connection with the gas source connection. Apparently, after adopting the utility model, the pressure test can be carried out on pipelines with an outer diameter of ≤12mm without any auxiliary power and device. The actual test shows that after adopting the utility model, the pressure value of the hydraulic test can reach 18MPa, and the underwater The pressure value of the air pressure test can reach 14Mpa, and the clamping time is only within 20 seconds, which can significantly improve the pressure test efficiency, and this clamping method will not damage the pipe, so it is especially suitable for production, engineering projects and equipment manufacturing. Pressure testing of small bore pipes.

Claims (5)

1. fast interface device that the small-bore pipeline pressure testing is used, comprise first, second member (1,2), it is characterized in that: the front end of described first member (1) has air supply source and takes over the cylinder (11) that connects, the rearward end of this first member (1) has the tapped inner chamber of oral area (12), the elastic filler body (4) that the confession pipe under test of hollow stretches into is installed in this inner chamber, and the leading section of described first member (1) has the through hole (13) that axially runs through described cylinder and be communicated with described inner chamber; The leading section of described second member (2) has the double-screw bolt (21) that is threaded mutually with the oral area of above-mentioned inner chamber, have in this second member (2) for pipe under test and stretch into and run through double-screw bolt and the axial hole (22) relative with above-mentioned inner chamber, simultaneously on described second member (2) also dismounting be connected with the clamping body of described pipe under test being held tightly on described second member (2) (3).

2. the fast interface device that small-bore pipeline pressure testing according to claim 1 is used is characterized in that: the rearward end of described second member (2) has a breach (23), and described clamping body (3) is seated in this breach (23).

3. the fast interface device that small-bore pipeline pressure testing according to claim 2 is used, it is characterized in that: described clamping body (3) is an anchor ear, accordingly, on the outer wall of described second member (2) both sides, extend and the corresponding lugs in described anchor ear both ends (24), be connected by bolt (5) between the end of each lug (24) and described anchor ear.

4. the fast interface device of using according to claim 1 or 2 or 3 described small-bore pipeline pressure testings, it is characterized in that: described cylinder has external thread on (11).

5. the fast interface device of using according to claim 1 or 2 or 3 described small-bore pipeline pressure testings, it is characterized in that: the profiled outline of described first and second member (1,2) is designed to the regular hexagon structure.

Images