A single-tube leak detection device for cooling walls

Abstract

A single-tube leak detection device for cooling walls includes a lifting section, a disc, a pressure measuring section, and a sealing section. The disc is mounted on the lifting section. The pressure measuring section is mounted on the disc. The sealing section is mounted on the pressure measuring section. The lifting section includes a base, columns, a sliding plate, a support plate, and a lifting mechanism. Two columns are arranged opposite each other on the top surface of the base. Vertical grooves are provided on the end faces of the two columns that are close to each other, and the sliding plate slides between the vertical grooves of the two columns. The lifting mechanism is located between the top of the columns and the base, and is connected to the sliding plate. Two support plates are provided, both mounted on the side wall of the sliding plate, and the disc presses against the top surfaces of the two support plates. This invention improves the reliability and efficiency of single-tube leak detection for cooling walls.

Description

Technical Field

[0001] This utility model relates to a single-tube leak detection device, and more particularly to a device capable of individually detecting leaks in each cooling tube of a cooling wall, belonging to the technical field of cooling wall leak detection equipment. Background Technology

[0002] In the extremely complex and continuous production process of blast furnace ironmaking in the metallurgical industry, the cooling wall is the core barrier protecting the life and safety of the blast furnace. However, the cooling wall is constantly subjected to the harsh environment of high temperature, high pressure, and high wear. Any seemingly small cooling pipe may be the first to break and leak due to localized corrosion, weld defects, water erosion, or thermal stress concentration. Once the leaked cooling water enters the high-temperature zone inside the furnace, the instantaneous vaporization and expansion may induce violent fluctuations or even an explosion in the furnace body, directly causing a catastrophic safety accident. At the same time, the blast furnace must be shut down immediately to deal with the leak, resulting in huge costs. Production interruption losses and repair costs, as well as irreversible damage to the furnace lining; traditionally, the industry generally relies on manual experience to judge, such as observing the actual condition of the furnace shell, monitoring the macroscopic changes in the total inlet and outlet water flow and temperature of the cooling system, or conducting offline hydrostatic tests regularly. These methods are not only seriously lagging and unable to respond in real time, but also difficult to accurately locate the initial leak point among hundreds of cooling pipes. Often, the leak is only discovered when the hidden danger has expanded into an accident, leaving the blast furnace in a passive protection state of "leaking operation" for a long time; therefore, a device that can detect leaks in each cooling pipe of the cooling wall individually is needed. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a single-tube leak detection device for cooling walls, which can efficiently detect leaks in a single cooling tube of the cooling wall.

[0004] The problem described in this utility model is solved by the following technical solution: A single-tube leak detection device for a cooling wall includes a lifting section, a disc, a pressure measuring section, and a sealing section. The disc is disposed on the lifting section. The pressure measuring section is disposed on the disc. The sealing section is disposed on the pressure measuring section. The lifting section includes a base, columns, a sliding plate, a support plate, and a lifting mechanism. There are two columns, which are disposed opposite each other on the top surface of the base. Vertical grooves are provided on the end faces of the two columns that are close to each other, and the sliding plate is slidably disposed between the vertical grooves of the two columns. The lifting mechanism is disposed between the top of the column and the base, and is connected to the sliding plate. There are two support plates, which are disposed on the side wall of the sliding plate, and the disc presses against the top surface of the two support plates.

[0005] The aforementioned single-tube leak detection device for cooling walls includes a lifting mechanism comprising a horizontal plate, a turntable, a lead screw, and a lead screw nut. The horizontal plate is positioned between the top surfaces of two columns. A hole is located at the center of the horizontal plate, and a bearing is installed on the inner wall of the hole. The top end of the lead screw is connected to the inner wall of the bearing ring on the horizontal plate. The center of the bottom surface of the turntable is connected to the top surface of the lead screw via a connecting rod, and a handle is provided on the top surface of the turntable. A blind hole is located on the top surface of the base, and a bearing is installed within the blind hole. The bottom end of the lead screw is connected to the inner wall of the bearing ring on the base. The lead screw nut is mounted on the lead screw and is connected to the end surface of the slide plate furthest from the support plate.

[0006] The aforementioned single-tube leak detection device for cooling walls includes a pressure testing component comprising a hollow rod, a pressure gauge, and a valve; a hole is provided in the center of the disc, and the hollow rod passes through the central hole of the disc, with the outer wall of the hollow rod welded to the inner wall of the central hole of the disc; a pressure gauge is provided at the bottom end of the side wall of the hollow rod; and a valve is provided at the bottommost end of the hollow rod.

[0007] The aforementioned single-tube leak detection device for cooling walls includes a sealing component comprising a conical sealing gasket, an inflation tube, and a neoprene rubber bladder. The conical sealing gasket is positioned on the top surface of a disc and has a hole at its center, through which a hollow rod passes. The neoprene rubber bladder surrounds the top of the side wall of the hollow rod. The inflation tube passes through the conical sealing gasket and the perforation on the disc, with its top end connected to the neoprene rubber bladder. The air nozzle at the bottom of the inflation tube can be connected to an air pump.

[0008] This invention ensures that the pressure measuring part and the sealing part are reliably supported inside the pipe end by the supporting part; the pressure measuring part reliably determines the sealing condition of a single pipe; and the sealing part ensures that the pressure measuring part can reliably measure the pressure inside the single pipe. Attached Figure Description

[0009] Figure 1 This is a first-view structural diagram of the present invention; Figure 2 This is a schematic diagram of the second-view structure of the present invention.

[0010] The list of items labeled in the diagram is as follows: 1. Disc, 2. Base, 3. Column, 4. Slide plate, 5. Support plate, 6. Horizontal plate, 7. Turntable, 8. Screw nut, 9. Hollow rod, 10. Pressure gauge, 11. Valve, 12. Conical sealing gasket, 13. Inflation tube, 14. Neoprene airbag. Detailed Implementation

[0011] See Figure 1 and Figure 2The present invention includes a lifting part, a disc 1, a pressure measuring part, and a sealing part; the disc 1 is disposed on the lifting part; the pressure measuring part is disposed on the disc 1; the sealing part is disposed on the pressure measuring part; the function of the lifting part is to press the disc 1 so that it touches the end of the pipe, and to ensure that the sealing part reliably seals the end of the pipe and does not detach from the pipe.

[0012] The lifting section includes a base 2, columns 3, a sliding plate 4, a support plate 5, and a lifting mechanism. There are two columns 3, which are opposite each other on the top surface of the base 2. Vertical grooves are provided on the end faces of the two columns 3 that are close to each other, and the sliding plate 4 is slidably disposed between the vertical grooves of the two columns 3. Guided by the grooves on both sides of the columns 3, the sliding plate 4 reliably slides vertically, thereby driving the support plate 5 to slide synchronously. The lifting mechanism is located between the top of the columns 3 and the base 2, and is connected to the sliding plate 4. There are two support plates 5, both disposed on the side wall of the sliding plate 4, with a disc 1 pressing against the top surface of the two support plates 5. The lifting mechanism drives the sliding plate 4 to rise and fall. The push plate 5 provides support for the disc 1, ensuring that it can reliably press against the bottom port of the pipe.

[0013] The lifting mechanism includes a horizontal plate 6, a turntable 7, a lead screw, and a lead screw nut 8. The horizontal plate 6 is positioned between the top surfaces of the two columns 3. A hole is provided in the center of the horizontal plate 6, and a bearing is provided on the inner wall of the hole. The top of the lead screw is connected to the inner wall of the bearing inner ring on the horizontal plate 6. The center of the bottom surface of the turntable 7 is connected to the top surface of the lead screw via a connecting rod, and a handle is provided on the top surface of the turntable 7. Rotating the turntable 7 will drive the lead screw to rotate, and the rotating lead screw will drive the lead screw nut to move along the axis of the lead screw. A blind hole is provided on the top surface of the base 2, and a bearing is provided in the blind hole. The bottom end of the lead screw is connected to the inner wall of the bearing inner ring on the base 2. The lead screw nut 8 is mounted on the lead screw, and the lead screw nut 8 is connected to the end surface of the slide plate 4 away from the support plate 5. The lead screw nut drives the slide plate 4 to move synchronously along the vertical direction.

[0014] The pressure measuring part includes a hollow rod 9, a pressure gauge 10, and a valve 11; the center of the disc 1 has a hole, and the hollow rod 9 passes through the central hole of the disc 1, with the outer wall of the hollow rod 9 welded to the inner wall of the central hole of the disc 1; the bottom end of the side wall of the hollow rod 9 is provided with a pressure gauge 10; the bottommost end of the hollow rod 9 is provided with a valve 11; the pressure inside the hollow rod 9 can be determined by the pressure gauge 10, because the hollow rod 9 extends into the pipe and both ends of the pipe are sealed, so the pressure inside the hollow rod 9 is the same as the pressure inside the pipe; therefore, the pressure gauge 10 can detect the real-time pressure inside the pipe.

[0015] The sealing part includes a conical sealing gasket 12, an inflation tube 13, and a neoprene rubber airbag 14. The conical sealing gasket 12 is disposed on the top surface of the disc 1, and has a hole in its center. The hollow rod 9 passes through the central hole of the conical sealing gasket 12. When the disc 1 presses against the end of the tube, the conical sealing gasket 12 seals the end of the tube. The neoprene rubber airbag 14 surrounds the top of the side wall of the hollow rod 9. The inflation tube 13 passes through the conical sealing gasket 12 and the perforation on the disc 1, and the top of the inflation tube 13 is connected to the neoprene rubber airbag 14. The air nozzle at the bottom of the inflation tube 13 can be connected to an air pump. Gas is injected into the neoprene rubber airbag 14 through the air pump to make it expand, and the expanded neoprene rubber airbag 14 seals the end of the tube.

[0016] Operating principle: Place base 2 on the ground and disc 1 on support plate 5. Adjust the positions of base 2 and disc 1 so that disc 1 is directly below the single tube of the cooling wall to be tested. Then rotate turntable 7 to move the lead screw nut upward, which drives slide plate 4 upward synchronously. Disc 1 also moves upward until it touches the bottom end of the single tube of the cooling wall to be tested. At this time, the conical sealing gasket 12 initially seals the end of the tube, and the cooling water inside the tube is depressurized through the channel of hollow tube 9. This ensures that the conical sealing gasket 12 will not encounter excessive resistance during the sealing process. After disc 1 is in place, inflate tube 13. The neoprene rubber bladder expands to further seal the inner wall of the tube. After the neoprene rubber bladder has expanded, the valve at the end of the hollow rod 9 is closed, and then the valve at the water inlet of the single tube of the cooling wall to be tested is closed. Finally, the data change of the pressure gauge is observed. If the data of the pressure gauge does not fluctuate significantly within a certain period of time, it indicates that there is no leakage; otherwise, it indicates that a leakage has occurred. After the test is completed, the valve at the end of the hollow rod 9 is opened, and the valve at the water inlet of the single tube of the cooling wall is opened. Then, the neoprene rubber bladder is depressurized through the air inlet pipe 13, the turntable 7 is reversed to make the disc 1 descend, and then the device is removed. At this point, the test of a single cooling wall tube is completed.

Claims

1. A single-tube leak detection device for a cooling wall, characterized in that: It includes a lifting part, a disc (1), a pressure measuring part and a sealing part; the disc (1) is set on the lifting part; the pressure measuring part is set on the disc (1); the sealing part is set on the pressure measuring part; the lifting part includes a base (2), a column (3), a slide plate (4), a support plate (5) and a lifting mechanism; there are two columns (3), which are set opposite each other on the top surface of the base (2); vertical grooves are provided on the end surfaces of the two columns (3) that are close to each other, and the slide plate (4) is slidably set between the vertical grooves of the two columns (3); the lifting mechanism is set between the top of the column (3) and the base (2), and it is connected to the slide plate (4); there are two support plates (5), which are set on the side wall of the slide plate (4), and the disc (1) touches the top surface of the two support plates (5).

2. The single-tube leak detection device for cooling walls according to claim 1, characterized in that: The lifting mechanism includes a horizontal plate (6), a turntable (7), a lead screw, and a lead screw nut (8); the horizontal plate (6) is located between the top surfaces of the two columns (3); the center of the horizontal plate (6) is provided with a hole, and a bearing is provided on the inner wall of the hole, and the top of the lead screw is connected to the inner wall of the bearing inner ring on the horizontal plate (6); the center of the bottom surface of the turntable (7) is connected to the top surface of the lead screw through a connecting rod, and a handle is provided on the top surface of the turntable (7); the top surface of the base (2) is provided with a blind hole, and a bearing is provided in the blind hole, and the bottom of the lead screw is connected to the inner wall of the bearing inner ring on the base (2); the lead screw nut (8) is located on the lead screw, and the lead screw nut (8) is connected to the end surface of the slide plate (4) away from the support plate (5).

3. The single-tube leak detection device for cooling walls according to claim 2, characterized in that: The pressure measuring part includes a hollow rod (9), a pressure gauge (10), and a valve (11); the center of the disc (1) is provided with a hole, and the hollow rod (9) passes through the center hole of the disc (1), and the outer wall of the hollow rod (9) is welded to the inner wall of the center hole of the disc (1); the bottom end of the side wall of the hollow rod (9) is provided with a pressure gauge (10); the bottom end of the hollow rod (9) is provided with a valve (11).

4. The single-tube leak detection device for cooling walls according to claim 3, characterized in that: The sealing part includes a conical sealing gasket (12), an inflation tube (13), and a neoprene rubber airbag (14); the conical sealing gasket (12) is set on the top surface of the disc (1) and has a hole in its center, and the hollow rod (9) passes through the central hole of the conical sealing gasket (12); the neoprene rubber airbag (14) surrounds the top of the side wall of the hollow rod (9); the inflation tube (13) passes through the conical sealing gasket (12) and the perforation on the disc (1), and the top of the inflation tube (13) is connected to the neoprene rubber airbag (14), and the air nozzle at the bottom of the inflation tube (13) can be connected to an air pump.

Images