A boiler pressure pipe detection device

Abstract

The utility model belongs to pressure pipeline measurement testing technical field relates to a boiler pressure pipeline detection device, including the matched structure's cylindrical shell for being sleeved on pressure pipeline and forming the sealed annular space with it and the fastening bolt for locking the cylindrical shell, the outside wall of cylindrical shell is provided with the connector, the inside of connector is communicated with the inside of cylindrical shell, is connected with the transparent rigid pipeline on the connector, and the inside of rigid pipeline is accommodated with liquid. The detection device can be used for detecting pressure pipeline leakage, and whether gas leakage exists in the sealed annular space can be judged by observing the liquid level change of the liquid in the rigid pipeline, which has the advantages of low cost compared with ultrasonic detection equipment and ray detection equipment.

Description

Technical Field

[0001] This utility model belongs to the field of pressure pipeline measurement and testing technology, specifically relating to a boiler pressure pipeline testing device. Background Technology

[0002] Boiler pressure pipelines, as pressure-bearing equipment, operate under harsh conditions of high temperature, high pressure, and sometimes corrosive media. To prevent accidents and ensure safety, leak detection is a routine part of the daily maintenance of pressure pipelines. Welds, flange connections, and threaded connections are the most common locations for leaks. Various methods exist for leak detection in pressure pipelines, each with its own advantages and disadvantages. For example, ultrasonic testing is non-destructive and accurate, but its equipment is expensive, requires coupling agents, and demands highly skilled personnel. Similarly, radiographic testing is non-destructive and accurate, but its equipment is expensive, involves radiation, and is bulky. Furthermore, soapy water testing is a classic and intuitive leak detection method, offering advantages of low cost and low technical requirements. However, it is labor-intensive, requiring personnel to spray soapy water at all potential leak locations (e.g., around the weld) and meticulously observe for visible soap bubbles. A slight oversight can cause the appearance of soap bubbles to be missed, leading to the leak being overlooked. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention proposes a boiler pressure pipeline detection device. This device is based on macroscopic detection methods for detecting leaks in pressure pipelines and has the advantages of low cost and the ability to detect leaks easily.

[0004] This utility model is achieved through the following technical solution: A boiler pressure pipeline inspection device includes a cylindrical outer shell with a mating structure for fitting onto the pressure pipeline to form a sealed annular space, and fastening bolts for locking the cylindrical outer shell. A connector is provided on the outer wall of the cylindrical outer shell, and the interior of the connector communicates with the interior of the cylindrical outer shell. A transparent rigid pipe is connected to the connector, and the interior of the rigid pipe contains liquid. The cylindrical outer shell of the inspection device can be installed outside the pressure pipeline to be inspected to form a sealed annular space. When a gas leak occurs at the pressure pipeline to be inspected, gas enters the sealed annular space. As the internal pressure increases, the gas can enter the rigid pipe through the connector, pushing the liquid inside. By observing the change in the liquid level inside the rigid pipe, it can be determined whether there is a gas leak in the sealed annular space.

[0005] Furthermore, the rigid pipe includes an upward-opening U-shaped connecting pipe with a connecting pipe extending outward at one end, which is connected to a connector. The other end of the connecting pipe is open. When there is a gas leak in the pressure pipe, the gas can push the liquid in the U-shaped connecting pipe to flow, causing the liquid level near the connector end of the U-shaped connecting pipe to be lower than the liquid level at the other end, thereby reflecting the gas leak.

[0006] Furthermore, the outer wall of the cylindrical shell is provided with a bracket for fixing the rigid pipe.

[0007] Furthermore, the bracket consists of a rod and a clamp. One end of the rod is fixed to the outer wall of the cylindrical shell, and the clamp is rotatably installed on the other end of the rod. A first bolt for locking the clamp is provided between the clamp and the other end of the rod. Opening the first bolt allows the clamp to be rotated to adjust the extension direction of the rigid pipe. When the cylindrical shell is installed on a horizontally extending, vertically extending, or inclined pressure pipe, it always ensures that the U-shaped connecting pipe of the rigid pipe has its opening facing upward in the vertical direction. A second bolt for closing the clamp to clamp and fix the rigid pipe is provided at the open end of the clamp.

[0008] Furthermore, the cylindrical outer shell includes two semi-circular tubes, each with an integrally formed flange on both sides. The two semi-circular tubes are joined together to form a circular tube, and the two sets of flanges are detachably connected by multiple fastening bolts. A semi-circular sealing plate is fixedly installed at both ends of each semi-circular tube, and a semi-circular groove is opened at the center of the semi-circular sealing plate. A sealing gasket is provided on each semi-circular tube, which consists of two semi-circular parts and two U-shaped parts. The two semi-circular parts are fixed to the inner walls of the two semi-circular grooves, and the two U-shaped parts are fixed to the two flanges. The two semi-circular parts and the two U-shaped parts are integrally formed. When the two semi-circular tubes are joined together and installed on the pressure pipe, after tightening the fastening bolts, the two sealing gaskets form a seal between the pressure pipe and the two semi-circular tubes, ensuring that the annular space formed between the cylindrical outer shell and the pressure pipe is a sealed space.

[0009] Furthermore, the inner wall and flange of the semi-circular slot are provided with grooves that fit with the sealing gasket, making the sealing gasket structure more stable and less likely to fall off.

[0010] Furthermore, the connector is connected to the rigid pipe via a flexible hose, and both ends of the flexible hose are detachably connected to the connector and the rigid pipe respectively. This allows for the installation of the cylindrical outer shell before the installation of the rigid pipe or the removal of the rigid pipe before the removal of the cylindrical outer shell, thus avoiding damage to the rigid pipe during the installation and removal of the cylindrical outer shell.

[0011] As can be seen from the above technical solution, the boiler pressure pipeline detection device provided by this utility model has the following advantages: This detection device can be used to detect leaks in pressure pipelines. Its cylindrical outer shell can be fitted and installed at the location to be inspected in the pressure pipeline, forming a sealed annular space between the shell and the pipeline. A rigid pipe can be mounted on the cylindrical outer shell via a bracket. The rigid pipe is connected to the annular space inside the cylindrical outer shell through a connector. Once a gas leak occurs at the location to be inspected in the pressure pipeline, the pressure in the sealed annular space will increase. The gas pressure can push the liquid inside the rigid pipe. By observing the change in the liquid level inside the rigid pipe, it can be determined whether there is a gas leak in the sealed annular space. Compared with ultrasonic testing equipment and X-ray testing equipment, this detection device has the advantage of low cost and low operating technical requirements. Based on the macroscopic visual inspection method, it only requires focusing on the change in the liquid level inside the rigid pipe to indicate whether there is a gas leak at the location to be inspected in the pressure pipeline, making it difficult to miss leaks. Attached Figure Description

[0012] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0013] Figure 1 This is a three-dimensional structural diagram of Example 1.

[0014] Figure 2 This is a schematic diagram of the exploded structure of Example 1.

[0015] Figure 3 This is a cross-sectional structural diagram of Example 1.

[0016] Figure 4 This is a schematic diagram of the structure of Example 2.

[0017] The components in the diagram are named as follows: 1. Pressure pipe; 2. Cylindrical outer shell; 2.1. Semi-circular pipe body; 2.2. Flange; 2.3. Sealing gasket; 2.3.1. Semi-circular part; 2.3.2. U-shaped part; 2.4. Semi-circular sealing plate; 3. Fastening bolt; 4. Connector; 5. Hoose; 6. Bracket; 6.1. Rod; 6.2. Pipe clamp; 6.3. First bolt; 6.4. Second bolt; 7. Rigid pipe. Detailed Implementation

[0018] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0019] Example 1 A boiler pressure pipeline detection device, such as Figures 1 to 3 As shown, it mainly consists of a cylindrical outer shell 2, fastening bolts 3, connectors 4, hoses 5, supports 6, and rigid pipes 7.

[0020] The cylindrical outer shell 2, such as Figure 1 and Figure 2 As shown, it is a mating structure, comprising two semi-circular tubes 2.1. Each semi-circular tube 2.1 has integrally formed flanges 2.2 on both sides. The two semi-circular tubes 2.1 are mated to form a circular tube, and the two sets of flanges 2.2 are detachably connected by multiple fastening bolts 3. Each semi-circular tube 2.1 has a semi-circular sealing plate 2.4 fixedly installed at both ends, and a semi-circular groove is opened at the center of the semi-circular sealing plate 2.4. Each semi-circular tube 2.1 is provided with a sealing gasket 2.3, which consists of two semi-circular parts 2.3. It consists of 1 and two U-shaped parts 2.3.2. The two semi-circular parts 2.3.1 are fixed to the inner walls of the two semi-circular slots respectively, and the two U-shaped parts 2.3.2 are fixed to the two flanges 2.2 respectively. The two semi-circular parts 2.3.1 and the two U-shaped parts 2.3.2 are integrally formed. When the two semi-circular tubes 2.1 are installed on the pressure pipe 1, after tightening the fastening bolts 3, the two sealing gaskets 2.3 form a seal between the pressure pipe 1 and the two semi-circular tubes 2.1, ensuring that the annular space formed between the cylindrical shell 2 and the pressure pipe 1 is a sealed space.

[0021] The connector 4, as Figures 1 to 3 As shown, it is welded to the outer wall of one of the semi-circular tubes 2.1, and the inside of the connector 4 is connected to the inside of the cylindrical shell 2. The bracket 6, as Figures 1 to 3 As shown, it is welded to the outer wall of the semi-circular pipe 2.1 where the connector 4 is located, and it is used to fix the rigid pipe 7. The rigid pipe 7, such as Figures 1 to 3 As shown, it is made of transparent material and includes a U-shaped connecting tube with the opening facing upward. One end of the connecting tube extends outward and is connected to the connector 4. The other end is open. The connecting tube of the rigid pipe 7 is fixed on the bracket 6. The end of the connecting tube away from the U-shaped connecting tube is connected to the connector 4 through the hose 5. The U-shaped connecting tube of the rigid pipe 7 contains liquid. When there is a gas leak in the pressure pipe 1, the gas can push the liquid in the U-shaped connecting tube to flow, so that the liquid level in the U-shaped connecting tube near the connector is lower than the liquid level at the other end, thereby reflecting the gas leak. In addition, the rigid pipe 7 can also be a corrugated pipe extending in the horizontal direction. When there is a gas leak in the pressure pipe 1, the gas can drive the liquid in the corrugated pipe to flow, so that the liquid in the trough near the joint end is pushed away, thereby reflecting the gas leak.

[0022] In this embodiment, as Figure 2 As shown, the inner wall of the semi-circular slot and the flange 2.2 are provided with grooves (2.5) that fit with the sealing gasket 2.3, making the structure of the sealing gasket 2.3 more stable and less likely to fall off.

[0023] In this embodiment, the two ends of the flexible tube 5 are detachably connected to the connector 4 and the rigid pipe 7, respectively, so that the cylindrical shell 2 can be installed first and then the rigid pipe 7 can be installed, or the rigid pipe 7 can be removed first and then the cylindrical shell 2 can be removed, thus avoiding damage to the rigid pipe 7 when disassembling or assembling the cylindrical shell 2.

[0024] The principle of this detection device for detecting leaks in pressure pipeline 1 in this embodiment is as follows: When detecting a leak in the boiler pressure pipeline 1, open the cylindrical outer shell 2 and align its two semi-circular tubes 2.1 at the location to be inspected (e.g., the weld seam) of the pressure pipeline 1. Install the various fastening bolts 3 to fix the cylindrical outer shell 2 to the pressure pipeline 1, forming a sealed annular space between the cylindrical outer shell 2 and the pressure pipeline 1. Fix the rigid pipe 7 to the bracket 6. The rigid pipe 7 and the connector 4 are connected by a flexible hose 5. Fill the U-shaped connecting pipe of the rigid pipe 7 with clean water. If a gas leak occurs at the location to be inspected in the pressure pipeline 1, the gas will enter the sealed annular space. As the internal pressure increases, after a period of time, the gas can enter the rigid pipe 7 through the connector 4 and push the liquid inside. Since the rigid pipe 7 is a transparent structure, after the detection device has been installed for a period of time, the liquid level change inside the rigid pipe 7 can be observed to determine whether there is a gas leak in the sealed annular space. It should be noted that the pressure inside the boiler pressure pipeline 1 is greater than atmospheric pressure and the liquid column pressure inside the rigid pipe 7. Therefore, when a gas leak occurs, the increase in gas pressure inside the sealed annular space can push the liquid inside the rigid pipe 7 to move.

[0025] Example 2 A boiler pressure pipeline testing device, which differs from Embodiment 1 in that: Figure 4 As shown, the bracket 6 is composed of a rod 6.1 and a clamp 6.2. One end of the rod 6.1 is fixed to the outer wall of the cylindrical shell 2, and the clamp 6.2 is rotatably installed on the other end of the rod 6.1. A first bolt 6.3 for locking the clamp 6.2 is provided between the clamp 6.2 and the other end of the rod 6.1. A second bolt 6.4 for closing the clamp 6.2 to clamp and fix the rigid pipe 7 is provided at the open end of the clamp 6.2. Opening the first bolt 6.3 allows the pipe clamp 6.2 to be rotated to adjust the extension direction of the rigid pipe 7. When the cylindrical shell 2 is installed on the horizontally extending, vertically extending, or inclined extending pressure pipe 1, it is always ensured that the U-shaped connecting pipe of the rigid pipe 7 has its opening facing upward in the vertical direction, and that there are liquid columns at both ends of the U-shaped connecting pipe in the initial state, and that the liquid level is level.

Claims

1. A boiler pressure pipeline inspection device, comprising a cylindrical outer shell (2) of a mating structure for fitting onto a pressure pipeline (1) to form a sealed annular space therewith, and fastening bolts (3) for locking the cylindrical outer shell (2), characterized in that: The outer wall of the cylindrical shell (2) is provided with a connector (4), the inside of the connector (4) is connected to the inside of the cylindrical shell (2), and a transparent rigid pipe (7) is connected to the connector (4), the inside of the rigid pipe (7) is filled with liquid.

2. The boiler pressure pipeline detection device according to claim 1, characterized in that: The rigid pipe (7) includes an upward-opening U-shaped connecting pipe with a connecting pipe extending outward at one end, which is connected to the connector (4), and the other end is open.

3. The boiler pressure pipeline detection device according to claim 2, characterized in that: The outer wall of the cylindrical shell (2) is provided with a bracket (6) for fixing the rigid pipe (7).

4. The boiler pressure pipeline detection device according to claim 3, characterized in that: The bracket (6) consists of a rod (6.1) and a clamp (6.2). One end of the rod (6.1) is fixed to the outer wall of the cylindrical shell (2). The clamp (6.2) is rotatably installed on the other end of the rod (6.1). A first bolt (6.3) for locking the clamp (6.2) is provided between the clamp (6.2) and the other end of the rod (6.1). A second bolt (6.4) for closing the clamp (6.2) to clamp and fix the rigid pipe (7) is provided at the open end of the clamp (6.2).

5. The boiler pressure pipeline detection device according to claim 1, characterized in that: The cylindrical outer shell (2) includes two semi-circular tubes (2.1). Each semi-circular tube (2.1) has flanges (2.2) integrally formed on both sides. The two semi-circular tubes (2.1) are joined together to form a circular tube. The two sets of flanges (2.2) are detachably connected by multiple fastening bolts (3). Each semi-circular tube (2.1) has a semi-circular sealing plate (2.4) fixedly installed at both ends. The semi-circular sealing plate (2.4) has a semi-circular opening at its center. The shaped slot; each semi-circular tube (2.1) is provided with a sealing gasket (2.3). The sealing gasket (2.3) is composed of two semi-circular parts (2.3.1) and two U-shaped parts (2.3.2). The two semi-circular parts (2.3.1) are fixed to the inner walls of the two semi-circular slots respectively, and the two U-shaped parts (2.3.2) are fixed to the two flanges (2.2) respectively. The two semi-circular parts (2.3.1) and the two U-shaped parts (2.3.2) are integrally formed.

6. The boiler pressure pipeline detection device according to claim 5, characterized in that: The inner wall of the semi-circular slot and the flange (2.2) are provided with grooves (2.5) that mate with the sealing gasket (2.3).

7. The boiler pressure pipeline detection device according to claim 1, characterized in that: The connector (4) is connected to the rigid pipe (7) via a flexible hose (5), and both ends of the flexible hose (5) are detachably connected to the connector (4) and the rigid pipe (7) respectively.

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