Y-shaped sealing test tool

Abstract

The Y-shaped sealing test tool comprises a Y-shaped pipe, a pressure gauge control valve and a pressure reduction gauge control valve are installed on two pipes on the upper portion of the Y-shaped pipe respectively, and a pressure gauge and a pressure reduction gauge are correspondingly installed at the ends of the Y-shaped pipe; a pipe opening mask is arranged at the end of a lower pipe of the Y-shaped pipe in a penetrating mode and used for being connected with a vent pipe flange. The tool is easy to manufacture and high in practicability, the universality of the tool can be enhanced through the detachable design, and the safety and reliability of the tool are guaranteed through the pressure reduction safety device.

Description

Technical Field

[0001] This invention belongs to the field of ship communication technology, specifically relating to a Y-type precision testing tool. Background Technology

[0002] Currently, in the shipbuilding industry, a pneumatic test method is used to inspect the tightness of various liquid tanks. Specifically, after the tank is sealed, it is inflated for one hour according to tightness requirements. A pressure gauge is then installed at a position 500mm above the deck pressure on the vent pipe of a specific tank. This gauge is used to check whether the pressure drop in the tank after one hour of inflation is less than 3%, and to verify that no bubbles form in the soap solution on the weld inspection surface, thus determining whether the tank's tightness meets the requirements. Traditional self-made tooling is used to seal the vent pipe opening with a masking plate, and a threaded pipe is welded and fixed on it for installing the pressure gauge, etc. This tooling is not versatile enough for the various vent pipe diameters in many tanks throughout the ship. For each different vent pipe, a set of such tooling needs to be welded together with the masking plate and a set of threaded pipes to create a new set, consuming a large number of threaded pipes. If the threaded pipes are removed after use, repeated disassembly will shorten the length of the threaded pipes until they are unusable, which is also a form of waste. Therefore, it is necessary to research and develop a universal tightness testing tooling that can be reused and is safe and efficient, in conjunction with this pneumatic tightness testing method. Summary of the Invention

[0003] To address the technical problems existing in the prior art, the present invention provides a Y-type pressure testing fixture, comprising a Y-shaped tube, wherein a pressure gauge control valve and a pressure reducing gauge control valve are respectively installed on the upper two tubes of the Y-shaped tube, and a pressure gauge and a pressure reducing gauge are correspondingly installed at the end; a pipe end cover is provided at the end of the lower tube of the Y-shaped tube, and the pipe end cover is used to connect with the vent pipe flange.

[0004] Furthermore, the lower end of the Y-shaped tube is connected to the tube opening cover plate via a hollow first fastening bolt.

[0005] Furthermore, the nozzle cover is a circular plate with a through hole at the center, and bolt holes are pre-drilled along the outer edge of the nozzle cover. The nozzle cover is connected to the vent pipe flange by a second fastening bolt.

[0006] Furthermore, the size of the through hole matches the diameter of the first fastening bolt.

[0007] Therefore, the number of bolt holes is four.

[0008] Furthermore, the outer edge of the nozzle cover is provided with four circumferentially arranged grooves, the width of which matches the diameter of the second fastening bolt.

[0009] Furthermore, the nozzle cover plate and the vent flange, as well as the nozzle cover plate and the Y-shaped pipe, are both sealed.

[0010] The installation and use method of the above-mentioned Y-type precision testing fixture includes the following steps:

[0011] The first step is to install a Y-type test fixture at the vent pipe opening at a certain height above the deck according to the test procedure requirements before pressurizing the compartment. Check the tightness of the connection of this test fixture, and open the pressure gauge control valve and the pressure relief gauge control valve. Set the pressure relief value on the pressure relief gauge.

[0012] The second step is to pressurize the compartment through the air inlet and continuously observe the pressure value on the pressure gauge. Pressurization is stopped once the pressure value on the pressure gauge reaches the range required by the process. If the pressure in the compartment exceeds the range that the compartment can withstand, that is, exceeds the pressure reduction value set on the pressure reduction gauge, the pressure reduction gauge can automatically release pressure and restore the air pressure in the compartment to the normal range, which can prevent problems such as deformation of the compartment wall caused by excessive air pressure.

[0013] The third step is to spray soap solution onto the surface of all welds in the compartment after the pressure of the chamber meets the process requirements. The presence of bubbles is used to determine whether the welds are leaking. After checking that there are no leaks in all welds, the pressure gauge pressure is kept constant for 1 hour after the chamber is filled. This indicates that the chamber's tightness meets the requirements.

[0014] The fourth step is to adjust the pressure gauge value to the lowest level after the chamber tightness test is completed and meets the requirements, and slowly depressurize until there is no strong air pressure in the chamber, and then remove the Y-type tightness test fixture.

[0015] The fifth step is to conduct a tightness test on a compartment with a different pipe diameter. Simply remove the Y-tube, adapt the pipe end cover to match the vent pipe flange, and assemble the tightness test fixture for use.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] This tooling is simple to manufacture and highly practical. Its detachable design enhances its versatility, and its pressure-reducing safety device ensures its safety and reliability. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the Y-type precision testing fixture of the present invention;

[0019] Figure 2 This is a schematic diagram of the structure of the vent pipe flange of the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of the nozzle cover plate of the present invention. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0022] Reference Figure 1-3 This application proposes a Y-type precision testing fixture, which specifically includes:

[0023] The main materials are: Y-tube, pressure gauge, pressure reducing gauge, fastening stud, control panel, rubber sheet 1, rubber sheet 2, rubber sheet 3, and fastening bolts.

[0024] The Y-type pressure testing fixture uses internal threads at all three ends of the Y-shaped tube. Pressure gauge control valves and pressure reducing gauge control valves are installed at the middle of both upper ends, with corresponding pressure gauges and pressure reducing gauges installed at the ends. The lower end connects to the tube opening cover plate. Specifically, hollow fastening bolts pass through the central hole of the tube opening cover plate and are inserted into the threaded tube. Rubber is used between the threaded tube and the cover plate to ensure a tight connection. The cover plate is made in batches according to different vent pipe diameters, with holes drilled in the center and bolt holes pre-drilled at the four corners. The radius of these bolt holes matches the center radius of the bolt holes on the vent pipe flange. Specifically, when the tube opening cover plate is installed on the vent pipe flange, it is fixed at the four corners with fastening bolts. To ensure a tight connection, rubber is added between the cover plate and the flange.

[0025] Tooling Installation and Use: First, before pressurizing the compartment, install the Y-type pressure testing tooling at a certain height above the deck according to the pressure testing process requirements. Check the tightness of the tooling connection and open the pressure gauge control valve and pressure relief gauge control valve. Set the pressure relief value on the pressure relief gauge. Second, pressurize the compartment through the air inlet and continuously observe the pressure gauge reading. Stop pressurizing once the pressure gauge reading reaches the required range. If the compartment pressure exceeds the compartment's tolerable range (i.e., exceeds the pressure relief value set on the pressure relief gauge), the pressure relief gauge will automatically release pressure to restore the compartment's pressure. The third step involves spraying soap solution onto the surfaces of all welds in the compartment after the chamber pressure meets the process requirements. The presence of bubbles indicates potential leaks. After confirming no leaks, the chamber pressure is maintained constant for one hour to ensure the chamber's tightness meets requirements. The fourth step, after the chamber tightness test is completed and meets requirements, is to adjust the pressure gauge to its lowest setting and slowly depressurize until there is no significant pressure in the chamber. Then, the Y-type tightness testing fixture is removed. The fifth step is that when testing the tightness of a compartment with a different pipe diameter, simply remove the Y-type pipe, adapt a matching vent flange cover, and assemble the tightness testing fixture for use.

[0026] The Y-type pressure testing fixture proposed in this application is used for chamber pressure testing. This fixture combines a Y-shaped internally threaded tube with nozzle covers of different diameters to form a pressure testing fixture suitable for different vent pipes. The innovative connection between the Y-shaped internally threaded tube and the nozzle cover uses hollow studs, avoiding the problem of direct welding between the Y-shaped tube and the nozzle cover, increasing the adaptability of the Y-shaped tube. One set of Y-shaped tubes can be used with nozzle covers of all different diameters, thus improving the convenience of on-site chamber pressure testing. This fixture uses a Y-shaped design, with a pressure gauge installed on one side and a pressure reducing gauge and pressure reducing valve installed on the other side, which also improves safety during chamber pressurization and testing. By manufacturing a batch of control nozzles of different diameters and producing several sets of Y-shaped tubes as needed, a standard fixture can be made that can be reused for a long time. This solves the problem of material loss and replenishment after multiple uses in traditional pressure testing fixtures, reducing material and welding waste and achieving lean production.

[0027] In summary, these are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. All equivalent changes and modifications made in accordance with the scope of the present invention and the contents of the specification are within the scope of the present invention.

Claims

1. A Y-shaped precision testing fixture, characterized in that: The device includes a Y-shaped pipe, on which pressure gauge control valve and pressure reducing gauge control valve are respectively installed on the two upper pipes, and pressure gauge and pressure reducing gauge are respectively installed at the ends; the lower pipe of the Y-shaped pipe is provided with a pipe end cover plate, which is used to connect with the vent pipe flange.

2. The tooling according to claim 1, characterized in that: The lower end of the Y-shaped tube is connected to the tube opening cover plate via a hollow first fastening bolt.

3. The tooling according to claim 2, characterized in that: The nozzle cover is a circular plate with a through hole at the center. Bolt holes are pre-drilled along the outer edge of the nozzle cover. The nozzle cover is connected to the vent pipe flange by a second fastening bolt.

4. The tooling according to claim 3, characterized in that: The size of the through hole matches the diameter of the first fastening bolt.

5. The tooling according to claim 3, characterized in that: Therefore, there are four bolt holes.

6. The tooling according to claim 5, characterized in that: The outer edge of the pipe opening cover has four circumferentially arranged grooves, the width of which matches the diameter of the second fastening bolt.

7. The tooling according to claim 1, characterized in that: The pipe opening cover plate and the vent pipe flange, as well as the pipe opening cover plate and the Y-shaped pipe, are both sealed.

8. A method for installing and using the Y-type precision testing fixture as described in any one of claims 1-7, characterized in that, Includes the following steps: The first step is to install a Y-type test fixture at the vent pipe opening at a certain height above the deck according to the test procedure requirements before pressurizing the compartment. Check the tightness of the connection of this test fixture, and open the pressure gauge control valve and the pressure relief gauge control valve. Set the pressure relief value on the pressure relief gauge. The second step is to pressurize the compartment through the air inlet and continuously observe the pressure value on the pressure gauge. Pressurization is stopped once the pressure value on the pressure gauge reaches the range required by the process. If the pressure in the compartment exceeds the range that the compartment can withstand, that is, exceeds the pressure reduction value set on the pressure reduction gauge, the pressure reduction gauge can automatically release pressure and restore the air pressure in the compartment to the normal range, which can prevent problems such as deformation of the compartment wall caused by excessive air pressure. The third step is to spray soap solution onto the surface of all welds in the compartment after the pressure of the chamber meets the process requirements. The presence of bubbles is used to determine whether the welds are leaking. After checking that there are no leaks in all welds, the pressure gauge pressure is kept constant for 1 hour after the chamber is filled. This indicates that the chamber's tightness meets the requirements. The fourth step is to adjust the pressure gauge value to the lowest level after the chamber tightness test is completed and meets the requirements, and slowly depressurize until there is no strong air pressure in the chamber, and then remove the Y-type tightness test fixture. The fifth step is to conduct a tightness test on a compartment with a different pipe diameter. Simply remove the Y-tube, adapt the pipe end cover to match the vent flange, and assemble the tightness test fixture for use.

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