Multi-caliber adaptive plugging plug for preventing foreign matters from falling into boiler heating surface pipe

Abstract

The utility model discloses a boiler heating surface pipe foreign matter falling prevention plugging plug with multi-caliber adaptability, which comprises a plugging plug body, a connecting chain and a magnetic spring clip, one end of the connecting chain is connected with the plugging plug body, and the other end of the connecting chain is connected with the magnetic spring clip; the plugging plug body comprises an elastic plug and an end cover, and the elastic plug is connected to the bottom of the end cover; the elastic plug comprises an elastic cone and elastic pressing plates, and the elastic pressing plates are circumferentially distributed on the outer side of the elastic cone. The pipe orifice temporary plugging device can adapt to temporary plugging of pipe orifices in a certain specification range, and has high field applicability; and the connecting chain and the magnetic spring clamp are additionally arranged, so that the plugging plug can be locked outside the pipe, the plugging plug is prevented from falling off and hurting people, the pipe and the like due to improper installation and the like, and the use safety is high.

Description

Technical Field

[0001] The utility model belongs to the field of boiler steel pipe welding, and in particular relates to a plug for preventing foreign objects from falling into a boiler heating surface pipe with multi-caliber adaptability. Background Art

[0002] With the advancement of the transformation and development of the power system, thermal power companies play a pivotal role in the power system. At present, thermal power units are developing in the direction of high parameters and large capacity. At the same time, the frequency of thermal power units participating in the deep peak regulation of the power grid is increasing, which also puts forward higher requirements for the monitored metal materials of the units.

[0003] The boiler heating surface tubes are also called the "four tubes" of the boiler, including water-cooled walls, superheaters, reheaters and economizers. Their main function is to transfer the heat generated by the combustion of fuel to the working fluid, and then heat the working fluid to a high-pressure steam state during the circulation process. Therefore, the service environment of the boiler heating surface tubes is relatively harsh, which also leads to the explosion and leakage of the boiler heating surface tubes becoming an important reason for the unit's non-stop shutdown.

[0004] In recent years, we have reviewed the explosion and leakage accidents of boiler heating surface tubes and found that some explosions and leakages of boiler heating surface tubes occurred because the tubes were blocked by foreign objects, which prevented the working fluid from passing through and taking away the heat in time, resulting in over-temperature leakage of the steel tubes. The investigation found that some foreign objects were dropped into the pipeline during installation or welding, and during the work communication, it was found that some installation or welding personnel had foreign objects dropped into the tubes during work. Although timely discovery avoided overheating and tube explosion after startup, the subsequent handling of foreign objects often caused time and economic losses.

[0005] Therefore, it is of great significance to design a component that can effectively, conveniently and quickly temporarily block the pipe opening of the boiler heating surface to prevent foreign matter from falling in. Utility Model Content

[0006] The purpose of the utility model is to overcome the above-mentioned shortcomings in the prior art and to provide a boiler heating surface tube anti-foreign matter falling-in plug with a reasonable structural design and adaptability to multiple calibers. The utility model can temporarily block the tube openings of the boiler heating surface tubes before they are installed in place and welding is not carried out. The utility model is easy to install and disassemble, can adapt to the requirements for blocking the tube openings of heating surface tubes with different diameters and wall thicknesses, and prevent foreign matter from falling into the tube due to negligence or the like.

[0007] The technical solution adopted by the utility model to solve the above-mentioned problem is: a plug for preventing foreign objects from falling into the heating surface tube of a boiler with multi-caliber adaptability, characterized in that it includes a plug body, a connecting chain and a magnetic spring clip, one end of the connecting chain is connected to the plug body, and the other end of the connecting chain is connected to the magnetic spring clip; the plug body includes an elastic plug and an end cover, and the elastic plug is connected to the bottom of the end cover; the elastic plug includes an elastic cone and an elastic pressure plate, and the elastic pressure plate is circumferentially distributed on the outside of the elastic cone.

[0008] Furthermore, the elastic cone is a conical structure composed of a plurality of stainless steel sheets, and the elastic pressure plate is made of a stainless steel sheet; the elastic cone and the elastic pressure plate have high elasticity and can undergo large elastic deformation during use.

[0009] Furthermore, a connecting column is provided on the top of the end cover, a connecting hole is opened on the connecting column, and one end of the connecting chain passes through the connecting hole and is connected to the connecting column.

[0010] Furthermore, a step is provided on the top of the elastic cone.

[0011] When in use, insert the elastic plug into the pipe until the end cap contacts the pipe section, which plays a role in temporarily blocking the pipe. When the device is inserted into the pipe, the elastic cone and the elastic pressure plate clamp the pipe wall to prevent the plug from falling. After the plug is installed in place, clamp the magnetic spring clip or use magnetism to adsorb it on the pipe section.

[0012] As mentioned above, when the device is inserted into the pipe, the elastic cone cooperates with the elastic pressure plate to clamp the pipe wall to prevent the plug from falling off. The principle is that the elastic cone and the elastic pressure plate are both made of stainless steel sheets with high elasticity. When the device is inserted into the pipe, the inner wall of the pipe generates an inward force on the elastic cone 6, and at this time the elastic cone generates an opposite reaction force on the pipe wall, and the outer wall of the pipe generates an outward force on the elastic pressure plate 7, and the elastic pressure plate 7 generates an opposite force on the outer wall of the pipe. At this time, the reaction of the elastic cone and the elastic pressure plate to the inner and outer walls of the pipe respectively enables the device to clamp the pipe wall.

[0013] In order to increase the stability of the elastic cone after it is inserted into the tube, a step is provided at the top of the elastic cone, that is, the size of the upper part of the cone is rapidly reduced through the step. At this time, when the plug is inserted into the tube, it is ensured that the cone part is completely located in the tube, thereby avoiding the reaction force of the inner wall of the tube on the cone causing the cone to slide out automatically.

[0014] The elastic plug design enables the plug to adapt to the temporary blocking of pipes of various specifications. It has good applicability and is convenient for temporary blocking of pipe openings during the installation and replacement of boiler heating surface pipes.

[0015] At the same time, a magnetic spring clip is used to fix the plug outside the pipe. After the plug is used or used, it can be fixed outside the heated surface pipe to prevent the plug from falling due to improper placement or other reasons, which has strong safety. It should be particularly noted here that the magnetic spring clip involved in the utility model is not made of magnetic material itself, but a magnet sheet is attached to the side of the spring clip support part.

[0016] Compared with the prior art, the utility model has the following advantages and effects: the utility model can adapt to the temporary blocking of pipe openings within a certain specification range and has strong on-site applicability; a connecting chain and a magnetic spring clip are added to lock the plug outside the pipe, thereby preventing the plug from falling and injuring people and pipes due to improper installation and the like, and has greater safety in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the plug of the utility model.

[0018] Figure 2 It is a structural schematic diagram of the plug body in the utility model.

[0019] Figure 3 It is a schematic diagram of the top view of the end cover of the utility model.

[0020] Figure 4 It is a schematic diagram of the top view of the elastic cone in the utility model.

[0021] Figure 5 It is a side structural schematic diagram of the elastic pressing plate in the utility model.

[0022] In the figure: the plug body 1, the connecting chain 2, the magnetic spring clip 3, the elastic plug 4, the end cover 5, the elastic cone 6, the elastic pressure plate 7, and the connecting column 8. DETAILED DESCRIPTION

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and through examples. The following examples are provided to explain the present invention, but the present invention is not limited to the following examples.

[0024] Example

[0025] See also Figures 1 to 5In the present embodiment, a plug for preventing foreign objects from falling into the heating surface tube of a boiler with adaptability to multiple calibers includes a plug body 1, a connecting chain 2 and a magnetic spring clip 3, one end of the connecting chain 2 is connected to the plug body 1, and the other end of the connecting chain 2 is connected to the magnetic spring clip 3; the plug body 1 includes an elastic plug 4 and an end cover 5, and the elastic plug 4 is connected to the bottom of the end cover 5; the elastic plug 4 includes an elastic cone 6 and an elastic pressure plate 7, and the elastic pressure plate 7 is circumferentially distributed on the outside of the elastic cone 6; a connecting column 8 is provided on the top of the end cover 5, and a connecting hole is opened on the connecting column 8, and one end of the connecting chain 2 is connected to the connecting column 8 through the connecting hole.

[0026] Specifically, the elastic cone 6 is a conical structure composed of multiple stainless steel sheets, a step is provided on the top of the elastic cone 6, and the elastic pressure plate 7 is made of stainless steel sheets; the elastic cone 6 and the elastic pressure plate 7 have high elasticity and can undergo large elastic deformation during use.

[0027] When in use, the elastic plug 4 is inserted into the pipe until the end cap 5 contacts the pipe orifice section, which plays a role in temporarily blocking the pipe orifice. When the device is inserted into the pipe, the elastic cone 6 cooperates with the elastic pressure plate 7 to clamp the pipe wall to prevent the plug from falling off. After the plug is installed in place, the magnetic spring clip 3 is clamped or magnetically adsorbed on the pipe section to prevent the plug from falling off due to improper placement after disassembly, thereby eliminating possible safety hazards.

[0028] In this embodiment, the elastic cone 6 and the elastic pressing plate 7 are made of a stainless steel sheet with a width of 7 mm and a thickness of 0.5 mm, and have high elasticity, wherein the gap between the elastic cone 6 and the elastic pressing plate 7 is 1 mm.

[0029] In this embodiment, the elastic cone 6 and the elastic pressure plate 7 are fixed on the end cover 5, and the fixing method can be riveted or bolted. A through hole with a diameter of 3.5 mm is opened at the center of the end cover 5, and the rivet or bolt passes through the through hole and is fixed on the end cover 5, which is convenient for disassembly.

[0030] In this embodiment, a step with a length of 10 mm is formed inwardly at the upper portion of the elastic cone 6 , and the distance between the plane of the step and the lower surface of the end cover 5 is 15 mm.

[0031] The plug is inserted into the pipe orifice, the elastic cone 6 is located inside the pipe, and the elastic pressure plate 7 is located outside the pipe. At this time, the elastic cone 6 and the elastic pressure plate 7 exert forces on the pipe wall in opposite directions, so after the plug is inserted into the pipe orifice, the pipe wall can be clamped effectively. The end of the elastic pressure plate 7 is bent, and the bending process can be backward bending to form an obtuse angle, or bending to form a ring with a diameter greater than 1 cm. The main purpose is to facilitate the elastic pressure plate 7 to be pulled up and placed outside the pipe when installing the plug.

[0032] In this embodiment, a cylindrical protruding connecting column 8 is provided on the end cover 5 , and a connecting hole with a diameter of 3 mm is opened on the connecting column 8 . The connecting chain 2 passes through the connecting hole and is connected to the plug body 1 .

[0033] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0034] In addition, it should be noted that the above content described in this specification is only an example of the structure of the utility model. All equivalent changes made based on the structure, features and principles described in the utility model patent are included in the protection scope of the utility model patent. Technicians in the technical field of the utility model can make various modifications, supplements or replace the specific embodiments described in a similar manner, as long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims, they should all fall within the protection scope of the utility model.

Claims

1. A plug for preventing foreign matter from falling into the heating surface tube of a boiler with multi-caliber adaptability, characterized in that: The plugging plug comprises a plug body (1), a connecting chain (2) and a magnetic spring clip (3), wherein one end of the connecting chain (2) is connected to the plug body (1), and the other end of the connecting chain (2) is connected to the magnetic spring clip (3); the plug body (1) comprises an elastic plug (4) and an end cover (5), wherein the elastic plug (4) is connected to the bottom of the end cover (5); the elastic plug (4) comprises an elastic cone (6) and an elastic pressure plate (7), wherein the elastic pressure plate (7) is circumferentially distributed on the outside of the elastic cone (6).

2. The plug for preventing foreign matter from falling into the boiler heating surface tube with multi-caliber adaptability according to claim 1 is characterized in that: The elastic cone (6) is a cone structure composed of a plurality of stainless steel thin plates, and the elastic pressure plate (7) is made of stainless steel thin plates.

3. The plug for preventing foreign matter from falling into the boiler heating surface tube with multi-caliber adaptability according to claim 1 is characterized in that: A connecting column (8) is provided on the top of the end cover (5), a connecting hole is provided on the connecting column (8), and one end of the connecting chain (2) passes through the connecting hole and is connected to the connecting column (8).

4. The plug for preventing foreign matter from falling into the boiler heating surface tube with multi-caliber adaptability according to claim 1 is characterized in that: The top of the elastic cone (6) is provided with a step.

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