A boiler pipe expansion pressure testing device

Abstract

The utility model relates to pressure testing device technical field discloses a kind of boiler pipe expansion joint pressure testing device, comprising: boiler pipeline, the inner circular wall surface expansion joint of boiler pipeline has connecting pipe, further include the pressure testing assembly for expansion joint pressure testing, the pressure testing assembly is arranged in the inner circular wall surface of the connecting pipe, the pressure testing assembly includes: plug, the plug is movably sleeved in the inner circular wall surface of the connecting pipe, the inner circular wall surface of the plug is fixedly sleeved with first fixed pipe, the outer circular wall surface of the first fixed pipe is threadedly connected with water pressure gauge, the utility model passes through the overall structure design of optimization device, cancel the setting of frame body, reduce overall space, simplify component volume and weight, avoid the problem that traditional device volume is huge, heavy, single person can complete carrying or short-distance transportation, can flexibly adapt to different operating positions of boiler installation site, effectively solve the defects of poor portability, inconvenient movement transportation.

Description

Technical Field

[0001] This utility model relates to the field of pressure testing devices, and in particular to a boiler tube expansion joint pressure testing device. Background Technology

[0002] As the core pressure-bearing component of a boiler system, the quality of the expansion joint between the boiler tubes and connecting pipes directly determines the safety and stability of boiler operation. During boiler assembly, the expansion joint process is required to ensure a tight fit between the connecting pipes and the inner wall of the boiler piping, forming a sealed pressure-bearing structure. After expansion, pressure testing is essential to verify the sealing and pressure resistance of the connection, preventing equipment damage or safety accidents caused by leakage under subsequent high-temperature and high-pressure conditions. Therefore, the pressure testing device is a key piece of equipment for controlling the quality of boiler tube expansion joints.

[0003] An existing boiler tube expansion and pressure testing device (announcement number: CN223154469U) has at least the following drawbacks: The aforementioned expansion joint pressure testing device is bulky and inconvenient to move and transport, resulting in poor portability and cumbersome use. In addition, the disassembly and assembly process requires tightening bolts one by one and making multiple adjustments and adjustments, which is cumbersome, time-consuming, affects construction efficiency, and is inconvenient to use. Therefore, there is an urgent need for a boiler tube expansion joint pressure testing device to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a boiler tube expansion and pressure testing device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A boiler tube expansion joint pressure testing device includes: a boiler pipe, a connecting pipe being expanded onto the inner circular wall of the boiler pipe, and a pressure testing assembly for performing expansion joint pressure testing. The pressure testing assembly is disposed on the inner circular wall of the connecting pipe. The pressure testing assembly includes: a plug, the plug being movably sleeved on the inner circular wall of the connecting pipe, a first fixing pipe being fixedly sleeved on the inner circular wall of the plug, a water pressure gauge being threadedly connected to the outer circular wall of the first fixing pipe, a second fixing pipe being threadedly connected to the other end of the water pressure gauge, a valve being threadedly connected to one end of the second fixing pipe, an end pipe being threadedly connected to the inner circular wall of the valve, a first quick clamp and a second quick clamp being fixedly installed on the outer circular walls of the connecting pipe and the boiler pipe, respectively, two U-shaped plates being fixedly installed on the outer circular walls of the first quick clamp and the second quick clamp, and two threaded tie rods being hinged to the outer circular wall of the plug. The threaded tie rods pass through the interior of the U-shaped plates and are threadedly connected to two threaded sleeves on their outer circular walls.

[0006] As a further embodiment of this utility model, the first quick clamp and the second quick clamp are respectively equipped with a coarse washer and a fine washer inside, and the inner diameters of the coarse washer and the fine washer are respectively matched with the outer diameters of the connecting pipe and the boiler pipe.

[0007] As a further embodiment of this invention, the outer circular wall surface of the plug is equipped with several sealing rings.

[0008] As a further embodiment of this utility model, a nut is fixedly installed at one end of the threaded sleeve.

[0009] As a further embodiment of this utility model, a limiting groove is provided on one side of the U-shaped plate, and the threaded sleeve abuts against the inner side of the U-shaped plate.

[0010] As a further embodiment of this utility model, the plug, the first quick clamp, and the second quick clamp are made of stainless steel.

[0011] As a further embodiment of this invention, the threaded tie rod is made of high-strength alloy steel. Compared with the prior art, the present invention has the following beneficial effects: 1. This utility model optimizes the overall structural design of the device, eliminates the frame, reduces the overall space, simplifies the size and weight of components, avoids the problem of traditional devices being bulky and heavy, and can be carried out by a single person for short-distance transportation. It can flexibly adapt to different working positions at the boiler installation site and effectively solve the defects of poor portability and inconvenience in moving and transporting.

[0012] 2. This utility model uses a threaded tie rod and a threaded sleeve with a nut for quick engagement, combined with the precise positioning of the U-shaped plate limiting groove, to reduce multiple adjustment and debugging steps, making the device assembly and disassembly process simpler, shortening the preparation and finishing time of a single pressure test, significantly improving construction efficiency, and solving the problems of cumbersome operation and long time consumption of traditional devices. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of a boiler tube expansion and pressure testing device proposed in this utility model; Figure 2 This is a schematic diagram of the boiler pipe structure of a boiler tube expansion and pressure testing device proposed in this utility model; Figure 3 This is a schematic diagram of the connecting pipe structure of a boiler tube expansion and pressure testing device proposed in this utility model; Figure 4 This is a schematic diagram of the first quick clamp structure of a boiler tube expansion and pressure testing device proposed in this utility model; Figure 5This is a schematic diagram of the second quick clamp structure of a boiler tube expansion and pressure testing device proposed in this utility model; Figure 6 This is a schematic diagram of the U-shaped plate structure of a boiler tube expansion joint pressure testing device proposed in this utility model.

[0014] In the diagram: 1. Boiler pipe; 2. Connecting pipe; 3. Plug; 4. First quick clamp; 5. Second quick clamp; 6. U-shaped plate; 7. Threaded tie rod; 8. Threaded sleeve; 9. First fixed pipe; 10. Second fixed pipe; 11. End pipe; 12. Water pressure gauge; 13. Valve; 14. Coarse washer; 15. Fine washer; 16. Sealing ring; 17. Limiting groove; 18. Nut. Detailed Implementation

[0015] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0016] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0018] Reference Figures 1-6A boiler tube expansion joint pressure testing device includes: a boiler pipe 1, a connecting pipe 2 expanded onto the inner circular wall of the boiler pipe 1, and a pressure testing assembly for performing expansion joint pressure testing. The pressure testing assembly is disposed on the inner circular wall of the connecting pipe 2 and includes: a plug 3, the plug 3 being movably sleeved on the inner circular wall of the connecting pipe 2, a first fixing pipe 9 being fixedly sleeved on the inner circular wall of the plug 3, a water pressure gauge 12 being threadedly connected to the outer circular wall of the first fixing pipe 9, and a second fixing pipe being threadedly connected to the other end of the water pressure gauge 12. 10. One end of the second fixed pipe 10 is threadedly connected to a valve 13. The inner circular wall of the valve 13 is threadedly connected to an end pipe 11. The outer circular walls of the connecting pipe 2 and the boiler pipe 1 are respectively fixedly installed with a first quick clamp 4 and a second quick clamp 5. The outer circular walls of the first quick clamp 4 and the second quick clamp 5 are respectively fixedly installed with two U-shaped plates 6. The outer circular wall of the plug 3 is hinged with two threaded tie rods 7. The threaded tie rods 7 pass through the interior of the U-shaped plate 6 and are threadedly connected to two threaded sleeves 8 on their outer circular walls.

[0019] In this embodiment, a coarse washer 14 and a fine washer 15 are respectively installed inside the first quick clamp 4 and the second quick clamp 5. The inner diameters of the coarse washer 14 and the fine washer 15 are matched with the outer diameters of the connecting pipe 2 and the boiler pipe 1, respectively. Several sealing rings 16 are installed on the outer circular wall of the plug 3. A nut 18 is fixedly installed at one end of the threaded sleeve 8. A limit groove 17 is opened on one side of the U-shaped plate 6. The threaded sleeve 8 abuts against the inner side of the U-shaped plate 6. The plug 3, the first quick clamp 4 and the second quick clamp 5 are made of stainless steel. The threaded tie rod 7 is made of high-strength alloy steel.

[0020] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects: When the user needs to expand and test the boiler pipe 1 and the connecting pipe 2 through the boiler pipe 1, after the connecting pipe 2 is expanded inside the boiler pipe 1, a suitable coarse washer 14 and a fine washer 15 are selected. The coarse washer 14 and the fine washer 15 are matched with the outer diameter of the boiler pipe 1 and the connecting pipe 2 respectively, so that the first quick clamp 4 and the second quick clamp 5 can be fixed on the outside of the boiler pipe 1 and the connecting pipe 2 respectively. Then, push the plug 3 and fit it inside the connecting pipe 2. Seal the gap between the two by several sealing rings 16. Then rotate the threaded pull rod 7 and place it inside the U-shaped plate 6 outside the first quick clamp 4 and the second quick clamp 5 (the U-shaped plate 6 on the outer wall of the first quick clamp 4 and the second quick clamp 5 is coaxially set). Then, rotate the threaded sleeve 8 so that it abuts against one side of the U-shaped plate 6. The first quick clamp 4 and the second quick clamp 5 pull the plug 3 through the threaded pull rod 7 (the length is sufficient and can be extended by connecting the ends with threaded sleeves, etc.) to prevent the plug 3 from sliding out of the connecting pipe 2 due to water pressure. Afterwards, the pressurizing equipment is connected to the end pipe 11, the valve 13 controls the switch, and the water pressure is detected by the water pressure gauge 12, and then the pressure test can be carried out. This device eliminates the frame setting, greatly reduces the overall space, simplifies the size and weight of the components, avoids the problem of traditional devices being bulky and heavy, and can be carried out by a single person for short-distance transportation. It can flexibly adapt to different working positions at the boiler installation site and effectively solve the defects of poor portability and inconvenience in moving and transporting.

[0021] After the pressure test is completed, tighten the threaded sleeve 8 so that it no longer abuts against the U-shaped plate 6, and then remove the plug 3. The disassembly and assembly process is convenient and quick. The threaded tie rod 7 is limited by the limiting groove 17 to prevent the connection between the threaded sleeve 8 and the U-shaped plate 6 from failing. The nut 18 allows the user to easily tighten the threaded sleeve 8. The quick-release design of the first quick clamp 4 and the second quick clamp 5 facilitates quick fixing of the device.

[0022] The other end of boiler pipe 1 is connected to the boiler equipment. During testing, valves such as the water inlet pipe of the boiler equipment must be closed to prevent water leakage and pressure drop.

[0023] The threaded tie rod 7 and the threaded sleeve 8 with nut 18 quickly engage, and combined with the precise positioning of the U-shaped plate limiting groove 17, the number of adjustment and debugging steps is reduced, making the disassembly and assembly process of the device simpler, shortening the preparation and finishing time of a single pressure test, and significantly improving construction efficiency.

[0024] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A boiler tube expansion joint pressure testing device, comprising: Boiler pipe (1), wherein a connecting pipe (2) is expanded to the inner circular wall of the boiler pipe (1), characterized in that: It also includes a pressure testing assembly for performing expansion joint pressure testing. The pressure testing assembly is disposed on the inner circular wall surface of the connecting pipe (2). The pressure testing assembly includes: a plug (3), which is movably sleeved on the inner circular wall surface of the connecting pipe (2). A first fixing pipe (9) is fixedly sleeved on the inner circular wall surface of the plug (3). A water pressure gauge (12) is threadedly connected to the outer circular wall surface of the first fixing pipe (9). A second fixing pipe (10) is threadedly connected to the other end of the water pressure gauge (12). A valve (13) is threadedly connected to one end of the second fixing pipe (10). The inner wall of the valve (13) is threaded with an end pipe (11). The outer wall of the connecting pipe (2) and the boiler pipe (1) are respectively fixedly installed with a first quick clamp (4) and a second quick clamp (5). The outer wall of the first quick clamp (4) and the second quick clamp (5) are respectively fixedly installed with two U-shaped plates (6). The outer wall of the plug (3) is hinged with two threaded pull rods (7). The threaded pull rods (7) pass through the interior of the U-shaped plate (6) and the outer wall is threaded with two threaded sleeves (8).

2. The boiler tube expansion and pressure testing device according to claim 1, characterized in that, The first quick clamp (4) and the second quick clamp (5) are respectively equipped with a coarse washer (14) and a fine washer (15), the inner diameters of the coarse washer (14) and the fine washer (15) being matched with the outer diameters of the connecting pipe (2) and the boiler pipe (1).

3. The boiler tube expansion joint pressure testing device according to claim 1, characterized in that, The outer circular wall of the plug (3) is fitted with several sealing rings (16).

4. The boiler tube expansion joint pressure testing device according to claim 1, characterized in that, A nut (18) is fixedly installed at one end of the threaded sleeve (8).

5. A boiler tube expansion joint pressure testing device according to claim 1, characterized in that, A limiting groove (17) is provided on one side of the U-shaped plate (6), and the threaded sleeve (8) abuts against the inside side of the U-shaped plate (6).

6. The boiler tube expansion and pressure testing device according to claim 1, characterized in that, The plug (3), the first quick clamp (4) and the second quick clamp (5) are made of stainless steel.

7. A boiler tube expansion joint pressure testing device according to claim 1, characterized in that, The threaded tie rod (7) is made of high-strength alloy steel.

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