Improved novel hydraulic test device for sealing illegal flange connection through ball indicator

Abstract

An improved novel hydraulic test device for a sealing flange connection through ball indicator comprises a blocking plate, a pressure maintaining pipe, a sealing body and a pressing plate from bottom to top, the blocking plate and the pressure maintaining pipe are welded and sealed, the pressure maintaining pipe and the sealing body are welded and sealed, and the pressing plate and the sealing body are detachably connected; the sealing body and the pressure maintaining pipe form a tubular structure for accommodating the ball passing indicator, a sealing surface is arranged on the inner surface of the sealing body, the sealing surface is an inclined surface of which the diameter is gradually reduced, the sealing body at the sealing surface inwards forms an annular boss structure, and the minimum diameter of the annular boss is equal to the outer diameter of the lower part of the ball passing indicator; and an O-shaped sealing ring is arranged on the sealing surface and is pressed between the outer circle step of the ball passing indicator and the sealing surface for sealing. Through the above structure, the utility model provides the improved novel hydraulic test device for the sealing illegal flange connection through ball indicator, which is low in cost, quick to operate and good in test effect.

Description

Technical Field

[0001] The utility model relates to a device for carrying out a water pressure test on a special type ball indicator, namely a non-flange connected ball indicator, in particular to an improved new type sealed non-flange connected ball indicator water pressure test device. Background Art

[0002] A ball-pass indicator is a device used to display the ball-pass status on industrial pipelines or pipeline accessories. It detects and displays the ball-pass status through a specific working principle. Ball-pass indicators are widely used in various industrial control systems. They are of great significance for real-time understanding of the ball-pass status, fault diagnosis and timely processing. There are many types of ball-pass indicators, including electronic ball-pass indicators, magnetic induction ball-pass indicators and mechanical ball-pass indicators. Some structures are flange connection structures, which can be subjected to water pressure tests through flange pressure test fixtures, but some ball-pass indicators are welded structures, not flange connection types. In order to achieve the purpose of water pressure testing of such ball-pass indicators, it is an urgent need for production and manufacturing to develop and research a new improved sealing device. Summary of the invention

[0003] In order to solve the above problems, the utility model provides a device for performing water pressure test on a ball indicator of welding connection type, i.e., a ball indicator of non-flange connection. When performing water pressure test on the ball indicator of non-flange connection, the seal is tight, the pressure test process is safe, and the operation is convenient and quick.

[0004] In order to solve the above technical problems, the technical solution of the utility model is as follows: an improved new-type sealed non-flange-connected ball-through indicator water pressure test device is provided, which includes, from bottom to top, a plugging plate, a pressure-maintaining tube, a sealing body, and a pressure plate. The plugging plate and the pressure-maintaining tube, and the pressure-maintaining tube and the sealing body are welded and sealed, and the pressure plate and the sealing body are detachably connected; the sealing body and the pressure-maintaining tube form a tubular structure for accommodating the ball-through indicator, and a sealing surface is provided inside the sealing body, and the sealing surface is an inclined surface with a gradually decreasing diameter. The sealing body at the sealing surface forms an annular boss structure inwardly, and the minimum diameter of the annular boss is equal to the outer diameter of the lower part of the ball-through indicator; an O-ring is provided on the sealing surface, and the O-ring is pressed between the outer circular step of the ball-through indicator and the sealing surface for sealing.

[0005] Preferably, the inner diameter of the pressure-maintaining tube is equal to the inner diameter of the sealing body at the lower part of the boss structure, and is larger than the outer diameter of the lower part of the ball indicator. The angle of the sealing surface corresponds to the angle of the outer circle step of the ball indicator. The inner diameter of the sealing body at the upper part of the boss structure is equal to the outer diameter of the upper part of the ball indicator.

[0006] Preferably, the pressure plate is connected to the sealing body by bolts.

[0007] Preferably, the blocking plate is provided with a through hole, which is connected to an external water pipeline. The water pipeline is provided with a pressure gauge and a pressure test pump to facilitate testing.

[0008] The beneficial effects of the utility model are:

[0009] The utility model adopts a unique concept to realize high pressure sealing, has low requirements on the roughness of the sealing surface, is easy to process, and also reduces the processing cost. Moreover, the operation is faster, more convenient and safer. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 : Schematic diagram of the structure of the ball indicator without flange connection;

[0011] Figure 2 : Schematic diagram of the structure of the utility model;

[0012] Figure 3a : Sectional view of sealing body;

[0013] Figure 3b : Top view of the sealing body;

[0014] Figure 4a : Cross-sectional view of the plugging plate;

[0015] Figure 4b :Top view of the blocking plate;

[0016] Figure 5a : Cross-sectional view of pressure plate;

[0017] Figure 5b : Top view of the pressure plate;

[0018] Figure 6 : Schematic diagram of the operation of the water pressure test process of the utility model. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] The improved new type sealed non-flange connected ball indicator water pressure test device comprises, from bottom to top, a plugging plate 1, a pressure-maintaining tube 2, a sealing body 3, and a pressing plate 5. The plugging plate 1 and the pressure-maintaining tube 2, and the pressure-maintaining tube 2 and the sealing body 3 are welded and sealed, and the pressing plate 5 and the sealing body 3 are detachably connected. Preferably, the pressing plate 5 is connected to the sealing body 3 by bolts.

[0021] The sealing body 3 and the pressure-maintaining tube 2 form a tubular structure for accommodating the ball-passing indicator 6. The inner surface of the sealing body 3 is provided with a sealing surface 3-1, and the sealing surface 3-1 is a slope with a gradually decreasing diameter. The sealing body 3 at the sealing surface 3-1 forms an annular boss structure inwardly, and the minimum diameter of the annular boss is equal to the lower outer diameter of the ball-passing indicator 6. Preferably, the inner diameter of the pressure-maintaining tube 2 is equal to the inner diameter of the sealing body 3 at the lower part of the boss structure, and is larger than the lower outer diameter of the ball-passing indicator 6. The angle of the sealing surface 3-1 corresponds to the angle of the outer circular step of the ball-passing indicator 6. The inner diameter of the sealing body 3 at the upper part of the boss structure is equal to the upper outer diameter of the ball-passing indicator 6. An O-type sealing ring 4 is provided on the sealing surface 3-1, and the O-type sealing ring 4 is pressed between the outer circular step of the ball-passing indicator 6 and the sealing surface 3-1 for sealing.

[0022] Preferably, the blocking plate 1 is provided with a through hole, which is connected to an external water pipeline. The water pipeline is provided with a pressure gauge and a pressure test pump to facilitate testing.

[0023] When used specifically, Figure 1 The non-flange connected ball indicator 6 structure shown is installed in Figure 2 In the device shown in the figure. The lower part of the sealing body 3 is welded to the pressure-bearing pipe 2, and the pressure-bearing pipe 2 is welded to the plugging plate 1. After placing the O-ring 4 of reasonable size in the position shown in the figure, the ball indicator 6 is manually installed in the device. The upper part of the sealing body 3 is fastened with the pressure plate 5 with bolts. The center hole of the plugging plate 1 is connected to the NPT1 / 2 external threaded joint, connected to the tee, and the pressure gauge and the inlet and outlet water pipelines are connected. When the pressure plate 5 is fastened to the sealing body 3 with bolts, the O-ring 4 is squeezed between the sealing surface of the sealing body and the outer circular step of the main body of the ball indicator 6 to form a double sealing surface, forming a strict sealing structure. When the pressure of the pressure test pump increases, the pressure test medium increases the medium pressure in the pressure chamber 2-1 to the pressure required by the process specification through the pipeline. At this time, the pressure medium performs a pressure test on the sealing surface structure inside the ball indicator 6. The structure of the ball indicator 6 is closed and fixed by the device of the utility model. Whether the ball indicator 6 can withstand the specified pressure can be tested on the pressure gauge. Specifically, if the pressure gauge pressure drops after the pressure test pump pressurizes and seals the device, it indicates that there is a problem with the sealing of the ball indicator 6 to be tested.

Claims

1. Improved new sealed non-flange connected ball indicator water pressure test device, characterized by: From bottom to top, it comprises a plugging plate (1), a pressure-maintaining tube (2), a sealing body (3), and a pressure plate (5); the plugging plate (1) and the pressure-maintaining tube (2), and the pressure-maintaining tube (2) and the sealing body (3) are welded and sealed, and the pressure plate (5) and the sealing body (3) are detachably connected; the sealing body (3) and the pressure-maintaining tube (2) form a tubular structure for accommodating a ball-passing indicator (6); a sealing surface (3-1) is provided on the inner surface of the sealing body (3); the sealing surface (3-1) is an inclined surface with a gradually decreasing diameter; the sealing body (3) at the sealing surface (3-1) forms an annular boss structure inwardly, and the minimum diameter of the annular boss is equal to the outer diameter of the lower part of the ball-passing indicator (6); an O-type sealing ring (4) is provided on the sealing surface (3-1), and the O-type sealing ring (4) is pressed between the outer cylindrical step of the ball-passing indicator (6) and the sealing surface (3-1) for sealing.

2. The improved new sealed non-flange connected ball indicator water pressure test device according to claim 1 is characterized in that: The inner diameter of the pressure-maintaining tube (2) is equal to the inner diameter of the sealing body (3) at the lower part of the boss structure, and is larger than the outer diameter of the lower part of the ball indicator (6).

3. The improved new sealed non-flange connected ball indicator water pressure test device according to claim 1 is characterized in that: The angle of the sealing surface (3-1) corresponds to the angle of the outer circular step of the ball passing indicator (6).

4. The improved new sealed non-flange connected ball indicator water pressure test device according to claim 1 is characterized in that: The inner diameter of the sealing body (3) at the upper part of the boss structure is equal to the outer diameter of the upper part of the ball indicator (6).

5. The improved new sealed non-flange connected ball indicator water pressure test device according to claim 1 is characterized in that: The pressing plate (5) is connected to the sealing body (3) via bolts.

6. The improved new sealed non-flange connected ball indicator water pressure test device according to claim 1 is characterized in that: The blocking plate (1) is provided with a through hole, which is connected to an external water pipeline, and a pressure gauge and a pressure test pump are provided on the water pipeline.

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