Plasma leak detection device for thermal power plant

Abstract

A thermal power plant plasma leak detection device disclosed by the present invention comprises an installation hoop and a leak detection assembly, the installation hoop comprises a lower hoop ring and an upper hoop ring, one end of the lower hoop ring is movably connected with one end of the upper hoop ring, the leak detection assembly comprises a lower thermal resistor, an upper thermal resistor and a control box, the lower thermal resistor is fixedly installed on the inner side of the lower hoop ring, and the upper thermal resistor is fixedly installed on the inner side of the lower hoop ring. The upper thermal resistor is fixedly installed on the inner side of the upper hoop ring, and the two sides of the control box are fixedly connected with connecting steel belts. The lower thermal resistor and the upper thermal resistor are attached to the lower side and the upper side of the horizontal position of the powder pipe correspondingly, the temperature of the upper side and the temperature of the lower side of the powder pipe are measured, and when a plasma cathode probe leaks water, due to the fact that water exists in the horizontal position of the powder pipe, pulverized coal is gradually adhered and accumulated; at the moment, the temperature measured by the lower thermal resistor and the upper thermal resistor changes, an obvious temperature difference is formed, the timeliness of plasma leakage detection is guaranteed, and the device can also be used for detecting the blocking condition of the branch pipe under the normal condition.

Description

Technical Field

[0001] The invention relates to the technical field of thermal power plants, in particular to a plasma leak detection device for thermal power plants. Background Art

[0002] Plasma is an important device for ignition of boilers in thermal power plants. It can effectively reduce the ignition time, and its good combustion-supporting properties can avoid incomplete combustion of pulverized coal. However, the cooling water in the cooling pipe of the cathode probe in the plasma often leaks, causing the powder pipe to be blocked.

[0003] At present, plasma cooling water leakage detection in thermal power plants mainly relies on indirect monitoring of changes in powder hose wind speed. The possibility of plasma leakage can be detected through the powder hose wind speed measuring device, but this method has significant limitations. During the monitoring process, once the wind speed changes, it usually means that the cooling water has formed a serious blockage or even a complete blockage in the powder hose. This blockage not only increases the detection delay, but also greatly increases the difficulty and workload of maintenance personnel when clearing and repairing. Summary of the invention

[0004] The purpose of the present invention is to provide a plasma leak detection device for a thermal power plant to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a plasma leak detection device for a thermal power plant, comprising a mounting clamp and a leak detection assembly, the mounting clamp comprising a lower clamp ring and an upper clamp ring, and one end of the lower clamp ring and the upper clamp ring are movably connected to each other, the leak detection assembly comprises a lower thermal resistor, an upper thermal resistor and a control box, the lower thermal resistor is fixedly installed on the inner side of the lower clamp ring, the upper thermal resistor is fixedly installed on the inner side of the upper clamp ring, both sides of the control box are fixedly connected with connecting steel belts, and one end of the connecting steel belt away from the control box is fixedly connected to the lower thermal resistor and the upper thermal resistor respectively, an upper temperature display screen is fixedly installed on one side of the control box, a lower temperature display screen is fixedly installed on the side of the control box where the upper temperature display screen is installed, an external socket is fixedly installed on one side of the control box, and an information transmitter is fixedly installed on the side of the control box where the external socket is installed.

[0006] Preferably, a lock head is fixedly mounted on one end of the lower hoop away from the upper hoop, and a lock seat is fixedly mounted on one end of the upper hoop away from the lower hoop, and the specifications of the lock head and the lock seat are compatible.

[0007] Preferably, a light alarm is fixedly installed on one side of the control box where the upper temperature display screen and the lower temperature display screen are installed, a buzzer alarm is fixedly installed on the side of the control box where the light alarm is installed, and a power socket is fixedly installed on the side of the control box where the external socket and the information transmitter are installed.

[0008] Preferably, a dredging knocking assembly is fixedly installed on the outer side of the upper hoop ring, and the dredging knocking assembly includes a driving assembly and a knocking assembly, and the knocking assembly is movably installed on the outer side of the driving assembly, and the driving assembly includes a mounting ear plate, one end of the mounting ear plate is fixedly connected to the outer side of the upper hoop ring, and a forward and reverse motor is fixedly installed on one side of the mounting ear plate, and a threaded rod is fixedly installed on the output end of the forward and reverse motor through the mounting ear plate, and an anti-slip plate is fixedly installed on the end of the threaded rod away from the forward and reverse motor, and a limiting slide rod is fixedly installed on one side of the mounting ear plate.

[0009] Preferably, the knocking assembly includes a movable seat and three movable blocks, a threaded hole is provided inside the movable seat, the threaded hole is threadedly connected to the outside of the threaded rod, a sliding hole is provided inside the movable seat, the movable seat is slidably installed on the outside of the limiting sliding rod through the sliding hole, three movable grooves are provided at the bottom of the movable seat, and the three movable blocks are slidably installed on the inner sides of the three movable grooves respectively, and knocking heads are fixedly installed at the bottom ends of the three movable blocks.

[0010] Preferably, pressure plate slide grooves are provided on both sides of the movable groove, and spring pressure plates are fixedly installed on both sides of one end of the movable block located inside the movable groove. The spring pressure plate is slidably installed on the inner side of the pressure plate slide groove, and a return spring is fixedly installed on the bottom end of the spring pressure plate, and the end of the return spring away from the spring pressure plate is fixedly connected to the bottom of the inner cavity of the pressure plate slide groove.

[0011] Preferably, the striking heads fixedly mounted at the bottom ends of the three moving blocks are shaped like a triangular pointed cone, a circular arc convex shape, and a circular arc concave shape, respectively.

[0012] Preferably, second magnets are fixedly mounted on the tops of the three moving blocks, first magnets are fixedly mounted at intervals on the outer sides of the limiting slide bar, and the magnetic poles of the opposing surfaces of the first magnet and the second magnet are the same.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The lower thermal resistor and the upper thermal resistor in the leak detection assembly are respectively fitted with the lower and upper sides of the horizontal position of the powder hose to measure the temperature of the upper and lower sides of the powder hose. When the plasma cathode probe leaks, the coal powder will gradually stick and accumulate due to the water in the horizontal position of the powder hose. At this time, the temperature measured by the lower thermal resistor and the upper thermal resistor will change, forming an obvious temperature difference. While ensuring the timeliness of plasma leakage detection, it can also be used to detect the blockage of branch pipes under normal circumstances, and greatly reduces the difficulty and time of maintenance. The device is more reliable and flexible, and does not need to change the original powder hose structure. It has the advantages of more convenient installation and accurate and timely detection.

[0015] 2. When the powder hose is struck by the set striking head, a series of vibration waves will be generated. When these vibration waves propagate inside the powder hose, they will interact with the coal powder particles, thereby changing their original static state or adhesion state. Under the action of vibration, the adhesion between the coal powder particles will be weakened or even completely destroyed, so that the coal powder can fall off the pipe wall more easily and flow with the airflow, thereby clearing the powder hose. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional appearance structure of the present invention.

[0017] Figure 2 It is a schematic diagram of the side-view stereoscopic structure of the present invention.

[0018] Figure 3 It is a schematic diagram of the three-dimensional structure of the present invention when viewed from above.

[0019] Figure 4 It is a schematic diagram of the three-dimensional structure of the striking component of the present invention.

[0020] Figure 5 It is a schematic diagram of the three-dimensional structure of the movable seat of the present invention.

[0021] Figure 6 It is a schematic diagram of the local three-dimensional structure of the present invention.

[0022] In the figure: 1. lower hoop; 2. upper hoop; 3. lower thermal resistor; 4. upper thermal resistor; 5. connecting steel belt; 6. control box; 7. light alarm; 8. buzzer alarm; 9. upper temperature display screen; 10. lower temperature display screen; 11. lock head; 12. lock seat; 13. forward and reverse motor; 14. mounting ear plate; 15. moving seat; 16. limit slide rod; 17. threaded rod; 18. first magnet; 19. threaded hole; 20. slide hole; 21. moving block; 22. knocking head; 23. second magnet; 24. spring pressure plate; 25. reset spring; 26. moving groove; 27. pressure plate slide groove; 28. anti-slip plate; 29. ​​external socket; 30. information transmitter. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] See also Figure 1-Figure 6The present invention provides a technical solution: a plasma leak detection device for a thermal power plant, comprising an installation hoop and a leak detection component, the installation hoop comprising a lower hoop ring 1 and an upper hoop ring 2, and one end of the lower hoop ring 1 and the upper hoop ring 2 are movably connected to each other, a lock 11 is fixedly installed at one end of the lower hoop ring 1 away from the upper hoop ring 2, a lock seat 12 is fixedly installed at one end of the upper hoop ring 2 away from the lower hoop ring 1, the specification of the lock 11 is compatible with the specification of the lock seat 12, the leak detection component comprises a lower thermal resistor 3, an upper thermal resistor 4 and a control box 6, the lower thermal resistor 3 is fixedly installed on the inner side of the lower hoop ring 1, the upper thermal resistor 4 is fixedly installed on the inner side of the upper hoop ring 2, both sides of the control box 6 are fixedly connected with connecting steel belts 5, and the connecting steel belts 5 are away from One end of the control box 6 is fixedly connected to the lower thermal resistor 3 and the upper thermal resistor 4 respectively, an upper temperature display screen 9 is fixedly installed on one side of the control box 6, a lower temperature display screen 10 is fixedly installed on the side of the control box 6 where the upper temperature display screen 9 is installed, an external socket 29 is fixedly installed on one side of the control box 6, an information transmitter 30 is fixedly installed on the side of the control box 6 where the external socket 29 is installed, a light alarm 7 is fixedly installed on the side of the control box 6 where the upper temperature display screen 9 and the lower temperature display screen 10 are installed, a buzzer alarm 8 is fixedly installed on the side of the control box 6 where the light alarm 7 is installed, and an electrical socket is fixedly installed on the side of the control box 6 where the external socket 29 and the information transmitter 30 are installed.

[0025] The working principle of the above technical solution is as follows: when in use, first install the mounting clamp sleeve on the outer side of the horizontal position of the powder hose, so that the lower hoop ring 1 and the upper hoop ring 2 are respectively located directly below and directly above the powder hose, and the lower hoop ring 1 and the upper hoop ring 2 are fixed to the outer side of the horizontal position of the powder hose through the cooperation of the lock head 11 and the lock seat 12, so that the lower thermal resistor 3 and the upper thermal resistor 4 in the leak detection assembly are respectively in contact with the lower side and the upper side of the horizontal position of the powder hose, and the temperatures of the upper and lower sides of the powder hose are measured, and the temperature data measured by the lower thermal resistor 3 and the upper thermal resistor 4 will be transmitted to the control box 6 through the connecting steel belt 5, and then the temperatures measured by the lower thermal resistor 3 and the upper thermal resistor 4 will be displayed respectively through the lower temperature display screen 10 and the upper temperature display screen 9, so as to facilitate on-site inspection by the staff. When the plasma cathode probe leaks water, the coal powder will gradually stick and accumulate due to the presence of water in the horizontal position of the powder hose. At this time, the temperatures measured by the lower thermal resistor 3 and the upper thermal resistor 4 will change. Due to the thermal conductivity of water and the presence of coal powder, the temperature of the lower thermal resistor 3 and the upper thermal resistor 4 will change. In the difference, coupled with the obstruction of heat conduction caused by the accumulation of coal powder, the upper thermal resistor 4 will detect a relatively high temperature, while the lower thermal resistor 3 will measure a relatively low temperature due to the accumulation of coal powder and the influence of moisture, which will form an obvious temperature difference. At this time, the powder pipe is not blocked, but there is a small amount of coal powder accumulated. At this time, the control box 6 will emit light and sound alarms through the light alarm 7 and the buzzer alarm 8 to notify nearby staff to check. This situation will greatly reduce the difficulty of staff maintenance and clearing, and will also shorten the maintenance time. In addition, the control box 6 can also be connected to the external data transmission cable through the external socket 29, and can transmit temperature data to the remote. At the same time, it can also be connected to the local area network through the information transmitter 30 to directly transmit temperature information to the remote, so that the remote can quickly understand the powder pipe situation and contact the on-site staff in time. The staff can more easily locate the accumulation area and take effective cleaning measures, which is of great significance to improving production efficiency and reducing downtime.

[0026] In another embodiment, Figure 1-Figure 6As shown, a dredging knocking assembly is fixedly installed on the outer side of the upper hoop ring 2, and the dredging knocking assembly includes a driving assembly and a knocking assembly. The knocking assembly is movably installed on the outer side of the driving assembly. The driving assembly includes a mounting ear plate 14, one end of the mounting ear plate 14 is fixedly connected to the outer side of the upper hoop ring 2, a forward and reverse motor 13 is fixedly installed on one side of the mounting ear plate 14, and a threaded rod 17 is fixedly installed on the output end of the forward and reverse motor 13 through the mounting ear plate 14, and an anti-slip plate 28 is fixedly installed on the end of the threaded rod 17 away from the forward and reverse motor 13, and a limited slide bar 16 is fixedly installed on one side of the mounting ear plate 14. The knocking assembly includes a moving seat 15 and three moving blocks 21. A threaded hole 19 is opened inside the moving seat 15, and the threaded hole 19 is threadedly connected to the outer side of the threaded rod 17. A sliding hole 20 is opened inside the moving seat 15, and the moving seat 15 is slidably installed on the outer side of the limiting slide bar 16 through the sliding hole 20. The bottom of the moving seat 15 Three moving grooves 26 are provided, and the three moving blocks 21 are slidably installed on the inner sides of the three moving grooves 26 respectively, and the bottom ends of the three moving blocks 21 are fixedly installed with knocking heads 22. The shapes of the knocking heads 22 fixedly installed on the bottom ends of the three moving blocks 21 are respectively triangular pointed cones, arc convex shapes and arc concave shapes. Pressure plate slide grooves 27 are provided on both sides of the moving grooves 26, and spring pressure plates 24 are fixedly installed on both sides of one end of the moving block 21 located inside the moving groove 26. The spring pressure plate 24 is slidably installed on the inner side of the pressure plate slide groove 27, and a return spring 25 is fixedly installed on the bottom end of the spring pressure plate 24, and the end of the return spring 25 away from the spring pressure plate 24 is fixedly connected to the bottom of the inner cavity of the pressure plate slide groove 27, and the tops of the three moving blocks 21 are fixedly installed with second magnets 23, and the outer sides of the limiting slide rod 16 are fixedly installed with first magnets 18 at intervals, and the magnetic poles of the first magnet 18 and the opposite surfaces of the second magnet 23 are the same.

[0027] When the control box 6 receives that there is a temperature difference between the temperatures measured by the lower thermal resistor 3 and the upper thermal resistor 4, the forward and reverse motor 13 can be controlled to perform intermittent forward and reverse transmission. The output end of the forward and reverse motor 13 can drive the threaded rod 17 to perform intermittent forward and reverse transmission, and under the limit of the limit slide 16 and the slide hole 20, the movable seat 15 can reciprocate on the outside of the limit slide 16 and the threaded rod 17. When the movable seat 15 moves on the outside of the limit slide 16, the movable seat 15 will continuously pass through the first magnet 18 on the outside of the limit slide 16. The first magnet 18 will exert a repulsive force on the second magnet 23 on the top of the movable block 21, so that the movable block 21 moves inside the movable groove 26, so that the knocking head 22 knocks on the outside of the powder tube. When the knocking head 22 knocks on the powder tube, a series of vibration waves will be generated. When these vibration waves propagate inside the powder tube, they will interact with the coal powder particles, thereby changing their original static state or attachment state. Under the action of vibration, the adhesion between coal powder particles will be weakened or even completely destroyed, so that the coal powder can fall off the pipe wall more easily and flow with the airflow to dredge the powder pipe. In addition, when the moving block 21 moves inside the moving groove 26, the spring pressure plate 24 can slide inside the pressure plate slide groove 27 and squeeze the reset spring 25 to deform the reset spring 25. When the moving seat 15 passes through the first magnet 18, the first magnet 18 no longer applies a repulsive force to the second magnet 23, and the reset spring 25 restores its deformation, so that the moving block 21 and the knocking head 22 are reset, thereby continuously knocking on the powder pipe. The three different knocking heads 22 can enhance the knocking effect, generate different vibration sources, and enhance the dredging effect. In addition, continuously knocking on the powder pipe will also produce sound to inform the surrounding staff.

[0028] Working principle: First, install the mounting hoop sleeve on the outside of the horizontal position of the powder hose, so that the lower hoop ring 1 and the upper hoop ring 2 are located directly below and directly above the powder hose, respectively, and the lower hoop ring 1 and the upper hoop ring 2 are fixed on the outside of the horizontal position of the powder hose through the cooperation of the lock head 11 and the lock seat 12, so that the lower thermal resistor 3 and the upper thermal resistor 4 in the leak detection assembly are respectively fitted with the lower side and the upper side of the horizontal position of the powder hose, and the temperature of the upper and lower sides of the powder hose is measured, and the temperature data measured by the lower thermal resistor 3 and the upper thermal resistor 4 will be transmitted to the control box 6 through the connecting steel belt 5, and then the lower temperature display screen 10 and the upper temperature display screen 9 will respectively measure the temperature of the lower thermal resistor 3 and the upper thermal resistor 4. The temperature is displayed to facilitate on-site inspection by staff. When the plasma cathode probe leaks, the coal powder will gradually stick and accumulate due to the water in the horizontal position of the powder pipe. At this time, the temperature measured by the lower thermal resistor 3 and the upper thermal resistor 4 will change, and an obvious temperature difference will be formed. At this time, the control box 6 will emit light and sound alarms through the light alarm 7 and the buzzer alarm 8. In addition, the control box 6 can also be connected to the external data transmission cable through the external socket 29 to transmit the temperature data to the remote. At the same time, it can also be connected to the local area network through the information transmitter 30 to directly transmit the temperature information to the remote. When the control box 6 receives the temperature measured by the lower thermal resistor 3 and the upper thermal resistor 4, there is a temperature difference. When the forward and reverse motor 13 is controlled to perform intermittent forward and reverse operation, the output end of the forward and reverse motor 13 can drive the threaded rod 17 to perform intermittent forward and reverse operation, and under the limit of the limit slide bar 16 and the slide hole 20, the moving seat 15 can reciprocate on the outside of the limit slide bar 16 and the threaded rod 17. When the moving seat 15 moves on the outside of the limit slide bar 16, the moving seat 15 will continuously pass through the first magnet 18 on the outside of the limit slide bar 16, and the first magnet 18 will exert a repulsive force on the second magnet 23 on the top of the moving block 21, so that the moving block 21 moves inside the moving groove 26, so that the knocking head 22 knocks on the outside of the powder tube. When the striking head 22 strikes the powder tube, the spring pressure plate 24 can slide inside the pressure plate slide groove 27 when the moving block 21 moves inside the moving groove 26, and squeeze the reset spring 25 to deform the reset spring 25. When the moving seat 15 passes the first magnet 18, the first magnet 18 no longer applies a repulsive force to the second magnet 23, and the reset spring 25 restores its deformation, so that the moving block 21 and the striking head 22 are reset, thereby continuously striking the powder tube. The three different striking heads 22 can enhance the striking effect, generate different vibration sources, and enhance the dredging effect. In addition, continuously striking the powder tube will also produce sound to inform the surrounding staff.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A plasma leak detection device for a thermal power plant, comprising a mounting clamp and a leak detection assembly, characterized in that: The mounting hoop comprises a lower hoop ring (1) and an upper hoop ring (2), and one end of the lower hoop ring (1) and the upper hoop ring (2) are movably connected to each other. The leak detection assembly comprises a lower thermal resistor (3), an upper thermal resistor (4) and a control box (6). The lower thermal resistor (3) is fixedly mounted on the inner side of the lower hoop ring (1), and the upper thermal resistor (4) is fixedly mounted on the inner side of the upper hoop ring (2). Both sides of the control box (6) are fixedly connected with connecting steel belts (5), and one end of the connecting steel belt (5) away from the control box (6) is fixedly connected to the lower thermal resistor (3) and the upper thermal resistor (4), respectively. An upper temperature display screen (9) is fixedly mounted on one side of the control box (6), and a lower temperature display screen (10) is fixedly mounted on the side of the control box (6) where the upper temperature display screen (9) is mounted. An external socket (29) is fixedly mounted on one side of the control box (6), and an information transmitter (30) is fixedly mounted on the side of the control box (6) where the external socket (29) is mounted.

2. The plasma leak detection device for a thermal power plant according to claim 1, characterized in that: A lock head (11) is fixedly mounted on one end of the lower hoop ring (1) away from the upper hoop ring (2), and a lock seat (12) is fixedly mounted on one end of the upper hoop ring (2) away from the lower hoop ring (1), and the specifications of the lock head (11) and the specifications of the lock seat (12) are compatible.

3. A thermal power plant plasma leak detection device according to claim 2, characterized in that: A light alarm (7) is fixedly mounted on one side of the control box (6) on which the upper temperature display screen (9) and the lower temperature display screen (10) are mounted, a buzzer alarm (8) is fixedly mounted on one side of the control box (6) on which the light alarm (7) is mounted, and a power socket is fixedly mounted on one side of the control box (6) on which the external socket (29) and the information transmitter (30) are mounted.

4. The plasma leak detection device for a thermal power plant according to claim 3, characterized in that: A dredging knocking assembly is fixedly mounted on the outer side of the upper hoop ring (2), and the dredging knocking assembly includes a driving assembly and a knocking assembly, and the knocking assembly is movably mounted on the outer side of the driving assembly, and the driving assembly includes a mounting ear plate (14), one end of the mounting ear plate (14) is fixedly connected to the outer side of the upper hoop ring (2), a forward and reverse motor (13) is fixedly mounted on one side of the mounting ear plate (14), an output end of the forward and reverse motor (13) passes through the mounting ear plate (14) and is fixedly mounted with a threaded rod (17), an end of the threaded rod (17) away from the forward and reverse motor (13) is fixedly mounted with an anti-slip plate (28), and a limiting sliding rod (16) is fixedly mounted on one side of the mounting ear plate (14).

5. The plasma leak detection device for a thermal power plant according to claim 4, characterized in that: The knocking assembly comprises a movable seat (15) and three movable blocks (21); a threaded hole (19) is provided inside the movable seat (15); the threaded hole (19) is threadedly connected to the outer side of a threaded rod (17); a sliding hole (20) is provided inside the movable seat (15); the movable seat (15) is slidably mounted on the outer side of a limit slide rod (16) through the sliding hole (20); three movable grooves (26) are provided at the bottom of the movable seat (15); and the three movable blocks (21) are respectively slidably mounted on the inner sides of the three movable grooves (26); and knocking heads (22) are fixedly mounted at the bottom ends of the three movable blocks (21).

6. The plasma leak detection device for a thermal power plant according to claim 5, characterized in that: A pressure plate slide groove (27) is provided on both sides of the movable groove (26); a spring pressure plate (24) is fixedly installed on both sides of one end of the movable block (21) located inside the movable groove (26); the spring pressure plate (24) is slidably installed on the inner side of the pressure plate slide groove (27); a return spring (25) is fixedly installed on the bottom end of the spring pressure plate (24); and the end of the return spring (25) away from the spring pressure plate (24) is fixedly connected to the bottom of the inner cavity of the pressure plate slide groove (27).

7. The plasma leak detection device for a thermal power plant according to claim 6, characterized in that: The striking heads (22) fixedly mounted at the bottom ends of the three moving blocks (21) are shaped in a triangular pointed cone, a circular arc convex shape, and a circular arc concave shape.

8. The plasma leak detection device for a thermal power plant according to claim 7, characterized in that: The tops of the three moving blocks (21) are all fixedly mounted with second magnets (23), and the outer sides of the limiting slide bars (16) are fixedly mounted with first magnets (18) at intervals, and the magnetic poles of the opposing surfaces of the first magnets (18) and the second magnets (23) are the same.

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