A boiler coil plugging and welding testing device

Abstract

The utility model belongs to the technical field of boiler equipment, more specifically, relate to a kind of boiler coil plugging welding testing device. Water tank (1) is communicated with the one end of first pipeline (2), first pipeline (2) is installed first stop valve (3) and water pump (4), the other end of first pipeline (2) is communicated with the one end of second pipeline (5), and multiple test branch pipes (6) are installed on second pipeline (5), the other end of second pipeline (5) is communicated with the one end of third pipeline (7), and the other end of third pipeline (7) is communicated with water tank (1), and pressure relief valve (8) is installed on third pipeline (7). The boiler coil plugging welding testing device, simple structure can be used to carry out plugging welding test to waste boiler coil, obtain the best welding data, effectively reduce the cost of on-site trial and error.

Description

Technical Field

[0001] This utility model belongs to the field of boiler equipment technology, and more specifically, it relates to a boiler coil sealing welding test device. Background Technology

[0002] In the field of boiler equipment, boiler coils are arranged in dense tube bundles and narrow spaces, making sealing and welding operations difficult and on-site maintenance risky (high temperature, limited space). The boiler water filling and draining pressure testing time is long, making it impossible to repeatedly test and optimize the process, which affects the welding quality.

[0003] Existing technology includes a designation titled "An Industrial Boiler with Waste Heat Recovery Capability," with publication number CN209688869U. This technology discloses an industrial boiler with waste heat recovery capability, comprising a base, an outer shell welded to the top outer wall of the base, and an inner shell welded to one side inner wall of the outer shell. An end cap is hinged to one side inner wall of the outer shell, and a burner is fixed to one side outer wall of the end cap by screws. A combustion furnace body is also fixed to one side outer wall of the end cap by screws. Both the top outer wall of the combustion furnace body and the top inner wall of the inner shell have vent pipes. A heat exchange coil is inserted into one end of the vent pipe, located between the outer shell and the inner shell. This invention ensures that water fully absorbs the heat from the flue gas, improving the utilization rate of thermal energy, accelerating the efficiency of subsequent water heating, improving the insulation effect of the inner shell, reducing heat loss from the outer shell, improving the working environment, reducing heat loss from the water tank, and preventing filter clogging.

[0004] However, this technology does not address the technical issues and solutions of this application. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a boiler coil sealing and welding test device that is simple in structure, can use waste boiler coils to perform sealing and welding tests, obtain the best welding data, and effectively reduce the cost of on-site trial and error, in order to overcome the shortcomings of the existing technology.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] This utility model is a boiler coil sealing welding test device. A water tank is connected to one end of a first pipeline. A first shut-off valve and a water pump are installed on the first pipeline. The other end of the first pipeline is connected to one end of a second pipeline. Multiple test branch pipes are installed on the second pipeline. The other end of the second pipeline is connected to one end of a third pipeline. The other end of the third pipeline is connected to the water tank. A pressure relief valve is installed on the third pipeline.

[0008] A one-way valve and a second shut-off valve are also installed on the first pipeline.

[0009] The first pipeline is equipped with a first shut-off valve, a water pump, a check valve, and a second shut-off valve in sequence from the end closest to the water tank to the end connecting to the second pipeline.

[0010] Each test branch is connected to a boiler coil to be welded.

[0011] A drain valve is installed on the drain pipe outlet of the water tank.

[0012] A first pressure gauge is installed on the first pipeline.

[0013] A second pressure gauge is installed on the third pipeline.

[0014] The first pipe connects to the bottom of the water tank, and the third pipe connects to the top of the water tank.

[0015] The drain outlet is installed near the bottom of the water tank.

[0016] The working principle and beneficial effects of this utility model are as follows:

[0017] The boiler coil plugging and welding testing device of this utility model is designed specifically for the actual layout of boiler coils in boiler equipment. A water tank stores test water and is connected to one end of a first pipeline. The other end of the first pipeline is connected to one end of a second pipeline. Multiple test branch pipes are installed on the second pipeline, and the other end of the second pipeline is connected to one end of a third pipeline. The other end of the third pipeline is connected to the water tank. A first shut-off valve and a water pump are installed on the first pipeline. The first shut-off valve can control the opening and closing of the pipeline, and the water pump pumps water from the tank when it starts. A pressure relief valve is installed on the third pipeline to control the opening and closing of the pipeline. For specific boiler equipment, to obtain optimal plugging and welding data, on-site testing is not required; instead, testing is performed using scrap boiler coils on the device of this utility model. Before conducting the tests, the drain pipe, the first pressure relief valve before the water pump, and the second shut-off valve before the boiler coils were closed. Water was added to the tank to the upper level. Then, multiple used boiler coils were connected to their corresponding test branches. The sealing joints of different used boiler coils were welded using different welding materials, parameters, and welding wires, and the results were recorded. The first shut-off valve before the water pump and the second shut-off valve after the water pump were opened, and the water pump was started to pump water through the different test branches into each boiler coil. The water pressure was increased to approximately 1.5 times the working pressure of the boiler coils and maintained for about 2 hours. The weld joints of the sealing joints of each used boiler coil were observed for leaks and pressure reduction. The observation results were recorded, and then the pressure relief valves were opened to release the pressure. The quality of the weld joints of the sealing joints after the pressure test of different used boiler coils was evaluated, and the best group was selected. The welding materials, parameters, and welding wire of this group were used as the data standard. When welding the sealing joints of boiler coils in boiler equipment, the welding materials, parameters, and welding wires specified in this design are used. This allows for testing with additional scrap boiler coils to obtain optimal welding data, eliminating the need for multiple welding tests on-site. Using this device eliminates the need for repeated testing in densely packed boiler coil configurations and confined spaces, reducing the difficulty of sealing welding operations and effectively lowering construction costs by eliminating the need for multiple welding tests. Attached Figure Description

[0018] The following is a brief explanation of the contents depicted in the accompanying drawings and the markings therein:

[0019] Figure 1 This is a schematic diagram of the boiler coil plugging welding test device of this utility model;

[0020] The labels in the attached diagram are as follows: 1. Water tank; 2. First pipeline; 3. First shut-off valve; 4. Water pump; 5. Second pipeline; 6. Test branch pipe; 7. Third pipeline; 8. Pressure relief valve; 9. Check valve; 10. Second shut-off valve; 11. Boiler coil; 12. Sewage outlet; 13. Sewage valve; 14. First pressure gauge; 15. Second pressure gauge. Detailed Implementation

[0021] The following description, with reference to the accompanying drawings, provides a more detailed explanation of the specific embodiments of this utility model, including the shape and structure of each component, the relative positions and connections between the parts, the functions and working principles of each part:

[0022] As attached Figure 1As shown, this utility model is a boiler coil plugging welding test device. A water tank 1 is connected to one end of a first pipeline 2. A first shut-off valve 3 and a water pump 4 are installed on the first pipeline 2. The other end of the first pipeline 2 is connected to one end of a second pipeline 5. Multiple test branch pipes 6 are installed on the second pipeline 5. The other end of the second pipeline 5 is connected to one end of a third pipeline 7. The other end of the third pipeline 7 is connected to the water tank 1. A pressure relief valve 8 is installed on the third pipeline 7. This structure addresses the shortcomings of existing technologies by proposing an improved technical solution. The structural design is tailored to the actual layout of boiler coils in boiler equipment, providing a boiler coil plugging welding test device. The water tank 1 is used to store test water. The water tank 1 is connected to one end of the first pipeline 2. The other end of the first pipeline 2 is connected to one end of the second pipeline 5. Multiple test branch pipes 6 are installed on the second pipeline 5. The other end of the second pipeline 5 is connected to one end of the third pipeline 7. The other end of the third pipeline 7 is connected to the water tank 1. A first shut-off valve 3 and a water pump 4 are installed on the first pipeline 2. The first shut-off valve 3 can control the opening and closing of the pipeline, and the water pump 4 pumps water out of the water tank when it starts. A pressure relief valve 8 is installed on the third pipeline 7, which can also control the opening and closing of the pipeline. For specific boiler equipment, in order to obtain the best sealing welding data, it is not necessary to conduct tests on the boiler equipment site. Instead, tests are conducted on the device of this utility model using scrap boiler coils. Before the test, the drain pipe 12 is closed, the first pressure relief valve 3 before the water pump 4 is closed, and the second shut-off valve 10 before the coil is closed. Water is filled into the water tank 1 to the upper liquid level. Then, multiple scrap boiler coils 11 are connected to the corresponding test branch pipes 6. The sealing ports of different scrap boiler coils 11 are welded using different welding materials, parameters, welding wires, etc., and the results are recorded. The first shut-off valve 3 before the water pump and the second shut-off valve 10 after the water pump are opened, and the water pump 4 is started to pump water through different test branch pipes 6 into each boiler coil 11. Pressurize the water to approximately 1.5 times the working pressure of the boiler coil 11, and maintain the pressure for about 2 hours. Observe the weld joints of the sealing pipes of each scrap boiler coil 11 for leaks and pressure drop. Record the observation results after observation, and then open the pressure relief valve 8 to release pressure. Evaluate the weld quality of the sealing pipe joints after pressure testing of different scrap boiler coils 11, and select the best group. Use the welding materials, parameters, and welding wire of this group as the data standard. When welding the sealing pipe joints of the boiler coils 11 in the boiler equipment, use the welding materials, parameters, and welding wire of this group for welding. In this way, the best welding data can be obtained by testing with additional scrap boiler coils 11, without having to conduct multiple welding tests on the boiler equipment site to obtain the best data. After adopting the device of this utility model, it is not necessary to conduct repeated tests in the dense tube bundles and confined spaces of the boiler coils 11, reducing the difficulty of sealing welding operations, and effectively reducing construction costs by eliminating the need for multiple welding tests.The boiler coil plugging welding test device described in this utility model has a simple structure and can use waste boiler coils to perform plugging welding tests, obtain the best welding data, and effectively reduce the cost of on-site trial and error.

[0023] A one-way valve 9 and a second shut-off valve 10 are also installed on the first pipeline 2. With this structure, the one-way valve ensures that water in the first pipeline can only flow from the water tank 1 to the test branch pipe 6, and will not flow back to the water tank 1. The second shut-off valve 10 can control its opening and closing. When connecting the test branch pipe 6 to the boiler coil, it can be a welded connection, or the test branch pipe 6 can be threaded, the boiler coil 11 can be welded with a threaded section, and sealing tape can be added to achieve a sealed connection.

[0024] The first pipe 2 is equipped with a first shut-off valve 4, a water pump 5, a one-way valve 9, and a second shut-off valve 10 in sequence from the end near the water tank 1 to the end connecting to the second pipe 5.

[0025] Each test branch pipe 6 is connected to a boiler coil 11 to be welded. In the above structure, the boiler coil 11 to be welded is the same as the coil actually used in the boiler equipment, except that it is a used coil. This ensures that the welding result is consistent with the actual coil used, and also realizes the reuse of waste resources.

[0026] A drain valve 13 is installed on the drain outlet 12 of the water tank 1. The drain outlet 12 is installed near the bottom of the water tank 1. In the above structure, the drain valve 13 installed on the drain outlet 12 can realize the closing and opening control, and the drain valve 13 can discharge sewage when it is open.

[0027] A first pressure gauge 14 is installed on the first pipeline 2. With this structure, the first pressure gauge 14 monitors the water pressure in the first pipeline in real time, effectively controlling the pressure during pressurization.

[0028] A second pressure gauge 15 is installed on the third pipeline 7. With this structure, the second pressure gauge 15 monitors the water pressure in the first pipeline in real time, effectively controlling the pressure during pressurization.

[0029] The first pipe 2 connects to the bottom of the water tank 1, and the third pipe 7 connects to the top of the water tank 1. In this structure, the first pipe 2 connecting to the bottom of the water tank 1 ensures a constant water supply to the test branch pipe during pressure testing. The third pipe 7 connecting to the top of the water tank 1 ensures that water in the pipes flows back to the water tank via the third pipe during pressure release, achieving water reuse.

[0030] The boiler coil plugging and welding testing device of this utility model is designed specifically for the actual layout of boiler coils in boiler equipment. A water tank 1 stores test water and is connected to one end of a first pipeline 2. The other end of the first pipeline 2 is connected to one end of a second pipeline 5. Multiple test branch pipes 6 are installed on the second pipeline 5, and the other end of the second pipeline 5 is connected to one end of a third pipeline 7. The other end of the third pipeline 7 is connected to the water tank 1. A first shut-off valve 3 and a water pump 4 are installed on the first pipeline 2. The first shut-off valve 3 can control the opening and closing of the pipeline, and the water pump 4 pumps water from the tank when started. A pressure relief valve 8 is installed on the third pipeline 7 and can also control the opening and closing of the pressure relief valve. For specific boiler equipment, to obtain optimal plugging and welding data, on-site testing is not required; instead, the testing is conducted using a discarded boiler coil on the device of this utility model. Before conducting the tests, the drain pipe 12, the first pressure relief valve 3 before the water pump 4, and the second shut-off valve 10 before the boiler coils were closed. Water was added to the water tank 1 to the upper level. Then, multiple used boiler coils 11 were connected to their corresponding test branch pipes 6. The sealing ports of different used boiler coils 11 were welded using different welding materials, parameters, and welding wires, and the results were recorded. The first shut-off valve 3 before the water pump and the second shut-off valve 10 after the water pump were opened, and the water pump 4 was started to pump water through the different test branch pipes 6 into each boiler coil 11. The water pressure was increased to approximately 1.5 times the working pressure of the boiler coil 11 and maintained for approximately 2 hours. The welds at the sealing ports of each used boiler coil 11 were observed for leaks and pressure reduction. The observation results were recorded, and then the pressure relief valve 8 was opened to release the pressure. The weld quality of the sealing joints of different scrap boiler coils 11 after pressure testing is evaluated, and the optimal group is selected. The welding materials, parameters, and welding wire of this group are used as the data standard. When welding the sealing joints of the boiler coils 11 in the boiler equipment, the welding materials, parameters, and welding wire of this group are used for welding. In this way, the optimal welding data can be obtained by testing with additional scrap boiler coils 11, without having to conduct multiple welding tests on the boiler equipment site to obtain the best data. After adopting the device of this utility model, it is not necessary to conduct repeated tests in the dense tube bundles and confined spaces of the boiler coils 11, reducing the difficulty of sealing welding operations, and effectively reducing construction costs by eliminating the need for multiple welding tests.

[0031] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any improvements made using the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A boiler coil plugging weld test apparatus, characterized by: The water tank (1) is connected to one end of the first pipeline (2). The first shut-off valve (3) and the water pump (4) are installed on the first pipeline (2). The other end of the first pipeline (2) is connected to one end of the second pipeline (5). Multiple test branch pipes (6) are installed on the second pipeline (5). The other end of the second pipeline (5) is connected to one end of the third pipeline (7). The other end of the third pipeline (7) is connected to the water tank (1). A pressure relief valve (8) is installed on the third pipeline (7).

2. The boiler coil plugging weld test device of claim 1, wherein: A check valve (9) and a shut-off valve (10) are also installed on the first pipeline (2).

3. The boiler coil plugging weld test apparatus of claim 2, wherein: The first pipeline (2) is equipped with a first shut-off valve (3), a water pump (4), a check valve (9), and a second shut-off valve (10) in sequence from the end closest to the water tank (1) to the end connecting to the second pipeline (5).

4. The boiler tube plugging weld test apparatus of claim 1 or 2, wherein: Each test branch (6) is connected to a boiler coil (11) to be welded.

5. The boiler tube plugging weld test apparatus of claim 1 or 2, wherein: A drain valve (13) is installed on the drain pipe (12) of the water tank (1).

6. The boiler tube plugging weld test apparatus of claim 1 or 2, wherein: A first pressure gauge (14) is installed on the first pipeline (2).

7. The boiler tube plugging weld test apparatus of claim 1 or 2, wherein: A second pressure gauge (15) is installed on the third pipeline (7).

8. The boiler tube plugging weld test apparatus of claim 1 or 2, wherein: The first pipe (2) connects to the water tank (1) near the bottom, and the third pipe (7) connects to the water tank (1) near the top.

9. The boiler coil plugging welding test device according to claim 5, characterized in that: The drain outlet (12) is installed near the bottom of the water tank (1).

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