Deslagging control valve structure
By using a conical valve head and fluidized purge system on the CFB boiler slag discharge pipe, the problems of valve body deformation and seal leakage at high temperature are solved, and the valve is flexible to switch and tightly sealed at high temperature are achieved, ensuring the stable operation and cleaning of the system.
Patent Information
- Application Number
- CN202422815131.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-19
- Publication Date
- 2025-09-02
- Estimated Expiration
- 2034-11-19
AI Technical Summary
The plug-in valve of the existing CFB boiler slag discharge pipe is deformed due to high-temperature hot slag burning, the connection weld fails, and leakage and poor sealing effect occur.
The conical valve head and valve stem structure is adopted, combined with a fluidized purge system, a sealed compression structure and a high-temperature observation mirror to achieve flexible switching and tight sealing of the valve, and a metal hose and water cooling system are used to ensure stable operation at high temperatures.
It reduces the deformation of the valve, ensures the flexible switching and tight sealing of the valve, avoids dust and smoke leakage, and improves the operating reliability and cleaning of the system.
Smart Images
Figure CN223294261U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of boiler slag discharge control valves, in particular to a slag discharge control valve structure. Background Art
[0002] Currently, the gate valves used on CFB boiler slag pipes are welded at both ends. Made entirely of stainless steel, they lack insulation. As a result, the high-temperature slag flow through them is affected by the heat of the slag flow and, over time, burns the valve body and disc, causing deformation. This ultimately renders the disc inoperable and the welds ineffective, cracking, and leaking. Furthermore, the sealing effect at the connection between the disc and the body is poor, resulting in significant ash and smoke leakage. Utility Model Content
[0003] The purpose of this utility model is to provide a slag discharge control valve structure to address the problems mentioned in the background art above, such as prolonged exposure to high-temperature slag, which can cause deformation of the valve body and valve plate, ultimately leading to valve plate inoperability and weld failure, cracking, and leakage. Furthermore, the sealing effect at the connection between the valve plate and the valve body is poor, resulting in severe ash and smoke leakage.
[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a slag discharge control valve structure, comprising a valve body, a valve plate, a fluidization purge structure and a sealing compression structure, the valve body has a built-in valve stem, a valve core is installed at the bottom of the valve stem, a conical valve head is installed on the top of the valve body, the conical valve head is connected with the fluidization purge structure, the conical valve head and the valve body are detachably installed through a sealing cover structure, the valve stem is connected with a sealing compression structure, the valve stem is provided with water supply and return water, the conical valve head is provided with an electric actuator, the bottom of the valve stem is fixed with a connecting base, the bottom of the connecting base is provided with a card groove, the top of the valve core is provided with a convex seat, the connecting base and the convex seat are respectively provided with a plurality of connecting holes one and a connecting hole two, the plurality of connecting holes one and the corresponding plurality of connecting holes two are all engaged with the matching plug rods, and the plurality of Each of the insertion rods is equipped with a tight cap gasket, and the bottom of the valve core is provided with a core seat, and the bottom of the core seat is provided with a groove plate, and the core seat and the groove plate are detachably connected to the connecting bolts, and a plurality of pressure plates are installed on the valve plate, and a plurality of soft convex balls are provided on the pressure plates. The bottom of the fluidized purge structure is connected to two inner sweeping pipes, and the two inner sweeping pipes are evenly distributed with explosion holes, and the two inner sweeping pipes are provided with connecting strips, and the two connecting strips are evenly distributed with soft swing pieces, and the fluidized purge structure is connected to a connecting pipe, and the connecting pipe is respectively connected to a connecting pipe and a metal hose, and the metal hose is connected to the lower slag pipe, and the metal hose is connected to the sealing compression structure, and the connecting pipe is connected to the purge box, and a switch valve is provided on the connecting pipe, and the purge box is connected to a flow controller, a pressure regulating controller and a transmitter.
[0005] As an optimal technical solution of the present invention, an observation tube is installed on the outside of the valve stem near the edge, and an upper mirror and a lower mirror are respectively provided at the top and bottom of the observation tube. A pressure cover is provided near the conical valve head of the observation tube, and the observation tube, upper mirror and lower mirror are all treated to resist high-temperature heat radiation.
[0006] As a preferred technical solution of the present invention, a connecting rod is installed at the bottom of the valve plate, a rotating disk is provided on the connecting rod, and a lower filter plate is detachably connected to the bottom of the connecting rod away from the valve plate.
[0007] As a preferred technical solution of the present invention, a slag pipe filter screen is detachably connected to the lower slag pipe, and a lower filter pipe passes through the right bottom of the slag pipe filter screen.
[0008] As a preferred technical solution of the present invention, a through pipe is provided on the purge box, and a filter is provided in the through pipe.
[0009] As an optimal technical solution of the present invention, the fluidized purge structure is detachably connected to the connecting pipe at the junction with a first tight connection structure, and the connecting pipe is detachably connected to the metal hose at the junction with a second tight connection structure.
[0010] As a preferred technical solution of the present invention, the electric actuator is connected to a voltage regulating controller.
[0011] As a preferred technical solution of the present invention, a support frame is installed on the valve stem, and a plurality of connecting screws are detachably connected to the support frame, and the plurality of connecting screws can be detachably connected to the valve body.
[0012] Compared with the prior art, the beneficial effects of the present invention are:
[0013] 1. The valve head adopts a conical structure to ensure that the overall deformation after heating is reduced. There is a clearance fit between the valve head and the valve port, and the valve can be opened and closed flexibly without jamming and tightly closed. The valve body and valve stem adopt a reasonable sealing method to ensure that there is no leakage of ash and air during operation. The conical valve head is equipped with a fluidized air purge system, and the valves and pipes of the air path use metal hoses to facilitate system connection. The conical valve stem is sealed with compressed air, and the compressed air uses metal pipes, which are connected to the system compressed air pipe nearby. The conical valve stem is water-cooled, and the cooling water supply and return are equipped with metal hoses and joints, which can not only ensure long-term operation at high temperatures, but also achieve the adjustment of ash discharge;
[0014] 2. The position of the valve head, stem, and valve core, as well as the slag discharge, can be observed through the observation tube, upper sight glass, and lower sight glass. Both the upper sight glass and the lower sight glass are magnifying glasses that can magnify the internal situation. The observation tube, upper sight glass, and the lower sight glass have been treated to resist high-temperature heat radiation, preventing injuries caused by accidental entry due to the valve not being tightly closed. The rotating disk can rotate under impact to clean the bottom of the valve plate and the surrounding area, and filter through the lower filter plate. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a cutaway perspective view of the present utility model;
[0016] Figure 2 This is an overall display diagram of the internal structure of the utility model;
[0017] Figure 3 This is a structural breakdown diagram of the present utility model;
[0018] Figure 4 This is a pipeline flow diagram of the utility model;
[0019] Figure 5 This is a main perspective view of the present utility model;
[0020] Figure 6 This is a structural diagram of the inner sweeping pipe, connecting strip and soft swing piece of the utility model;
[0021] Figure 7 This is a structural diagram of the flow controller, pressure regulating controller and transmitter of the utility model.
[0022] Figure: 1. Valve body; 2. Conical valve head; 3. Sealing cover structure; 4. Valve stem; 5. Connecting base; 6. Slot; 7. Connecting hole 1; 8. Valve core; 9. Boss; 10. Connecting hole 2; 11. Insert rod; 12. Tight cap gasket; 13. Core seat; 14. Groove plate; 15. Connecting bolt; 16. Valve plate; 17. Pressure plate; 18. Soft convex ball; 19. Connecting rod; 20. Rotating disk; 21. Lower filter plate; 22. Observation tube; 23. Lower microscope; 24. Upper microscope; 25. Fluidized purge structure; 26. Sealing compression structure ; 27. Lower slag pipe; 28. Water supply; 29. Return water; 30. Electric actuator; 31. Internal sweeping pipe; 32. Explosion hole; 33. Connecting pipe; 34. Connecting pipe; 35. Switch valve; 36. Purge box; 37. Through pipe; 38. Metal hose; 39. Slag pipe filter screen; 40. Lower filter pipe; 41. Tight connection structure 1; 42. Tight connection structure 2; 43. Support frame; 44. Connecting screw; 45. Pressure cover; 46. Connecting strip; 47. Soft pendulum; 48. Flow controller; 49. Pressure regulator; 50. Transmitter. DETAILED DESCRIPTION
[0023] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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 making creative efforts are within the scope of protection of the present invention.
[0024] See also Figure 1-7The utility model provides a slag discharge control valve structure, including a valve body 1, a valve plate 16, a fluidization purge structure 25 and a sealing compression structure 26. The valve body 1 has a built-in valve stem 4, a valve core 8 is installed at the bottom of the valve stem 4, a conical valve head 2 is installed on the top of the valve body 1, the conical valve head 2 is connected to the fluidization purge structure 25, the conical valve head 2 and the valve body 1 are detachably installed through a sealing cover structure 3, the valve stem 4 is connected to the sealing compression structure 26, the valve stem 4 is provided with a water supply 28 and a return water 29, the conical valve head 2 is provided with an electric actuator 30, the bottom of the valve stem 4 is fixed with a connecting base 5, and the bottom of the connecting base 5 is provided with a card Groove 6, a convex seat 9 is provided on the top of the valve core 8, and a plurality of connection holes 7 and connection holes 2 10 are respectively provided on the connecting base 5 and the convex seat 9. The plurality of connection holes 1 7 and the corresponding plurality of connection holes 2 10 are engaged with the adapted plug rod 11, and a tight cap gasket 12 is installed on the plurality of plug rods 11. A core seat 13 is provided at the bottom of the valve core 8, and a groove plate 14 is provided at the bottom of the core seat 13. The core seat 13 and the groove plate 14 are both detachably connected to the connecting bolt 15. A plurality of pressure plates 17 are installed on the valve plate 16, and a plurality of soft convex balls 18 are provided on the pressure plate 17. The bottom of the fluidized purge structure 25 is connected to two inner sweep pipes 31. The two inner sweeping pipes 31 are evenly spaced with blasting holes 32, and the two inner sweeping pipes 31 are both provided with connecting strips 46, and the two connecting strips 46 are evenly spaced with soft swing pieces 47. The fluidized purge structure 25 is connected to the connecting pipe 33, and the connecting pipe 33 is respectively connected to the connecting pipe 34 and the metal hose 38. The metal hose 38 is connected to the lower slag pipe 27, and the metal hose 38 is connected to the sealing compression structure 26. The connecting pipe 34 is connected to the purge box 36, and the connecting pipe 34 is provided with a switch valve 35. The purge box 36 is connected to a flow controller 48, a pressure regulating controller 49 and a transmitter 50. The valve stem 4 and the valve core 8 can be easily disassembled. To disassemble and install, specifically, the protrusion 9 on the valve core 8 is first engaged and fixed with the groove 6 on the connecting base 5, and then fixed with the protrusion 9 and the multiple connecting holes 1 7 and multiple connecting holes 2 10 on the connecting base 5 through multiple plug rods 11, and the groove plate 14 is installed on the valve core 8 through the connecting bolts 15, which plays a protective role when the valve core 8 is in operation. The groove plate 14 also increases the downward pressure area of the valve core 8. Multiple pressure plates 17 and soft convex balls 18 on the pressure plate 17 are added to the traditional valve plate 16, which increases the sealing effect between the valve plate 16 and the valve stem 4. The sealing effect of the connection position is good and there will be no ash or smoke leakage. The fluidized purge structure 25 drives the piston to move by alternately introducing the reversing operating air source, driving the slide block to slide left and right. The fuel and purge gas are alternately turned on and off to achieve fuel reversing and purging. During oil reversal, the oil is connected to the spray gun through the oil inlet hole of the slide block, and the slide block shifts to close the air inlet hole; while during oil shut-off purging, the air is connected to the spray gun through the air inlet hole of the slide block, and the slide block shifts to close the oil inlet hole.The effective switching of fuel and purge gas is ensured, thereby achieving cleaning and maintenance of the system. The internal purge pipe 31 extends to the inside of the valve body 1 to the valve plate 16 and is provided with a blast hole 32 to increase the purge efficiency. The soft swing pieces 47 evenly distributed on the connecting strip 46 can increase the fluidity during purge.
[0025] The slag discharge control valve, a regulating valve located on the slag discharge pipe from the furnace to the slag cooler, primarily regulates the amount of high-temperature material entering the slag cooler from the furnace. The slag discharge control valve operates in a high-temperature ash environment and adjusts as the boiler load changes. Even under stable boiler load, the slag discharge control valve can operate with subtle opening and closing movements within a certain timeframe to prevent jamming. The valve head 2 features a conical structure to minimize overall deformation after heating. A clearance fit between the valve head 2 and the valve port ensures flexible opening and closing, ensuring a tight closing. The valve body 1 and valve stem 4 utilize a comprehensive sealing mechanism to prevent ash and air leakage during operation. The conical valve head incorporates a fluidizing air purge system, and metal hoses are used for the airway valves and piping, facilitating connection of the system to the fluidizing air main pipe and the boiler slag discharge outlet. Compressed air is used to seal the conical valve stem, which is supplied by metal piping and conveniently connected to the system's compressed air piping. The cone valve stem is water cooled, and the cooling water supply and return water are equipped with a DN25 metal hose and joints.
[0026] An observation tube 22 is installed near the edge of the outside of the valve stem 4, and an upper mirror 24 and a lower mirror 23 are respectively provided at the top and bottom of the observation tube 22. A pressure cover 45 is provided near the conical valve head 2 of the observation tube 22. The observation tube 22, the upper mirror 24 and the lower mirror 23 are all treated to resist high-temperature heat radiation. The observation tube 22, the upper mirror 24 and the lower mirror 23 can observe the positions of the valve head 2, the valve stem 4 and the valve core 8 as well as the slag discharge situation. The upper mirror 24 and the lower mirror 23 are both magnifying glasses that can magnify the internal situation. The observation tube 22, the upper mirror 24 and the lower mirror 23 are all treated to resist high-temperature heat radiation, and will not cause damage due to accidental entry of personnel due to the valve not being tightly closed.
[0027] A connecting rod 19 is installed at the bottom of the valve plate 16, and a rotating disk 20 is provided on the connecting rod 19. The bottom of the connecting rod 19 is detachably connected to a lower filter plate 21 at a position away from the valve plate 16. The rotating disk 20 can rotate under impact to clean the bottom of the valve plate 16 and the vicinity, and filter through the lower filter plate 21.
[0028] A slag pipe filter screen 39 is detachably connected to the lower slag pipe 27, and a lower filter pipe 40 is passed through the right bottom of the slag pipe filter screen 39. The slag pipe filter screen 39 has a certain filtering effect on the lower slag pipe 27, increases the patency of the lower slag pipe 27, and the lower filter pipe 40 can collect the filtered slag.
[0029] The purge box 36 is provided with a through pipe 37 , and a filter is provided in the through pipe 37 . The purge box 36 is connected to the filter through the through pipe 37 , and the slag in the purge box 36 is filtered through the filter.
[0030] The fluidized purge structure 25 and the connecting pipe 33 are detachably connected with a tight connection structure 1 41 at the connection point, and the connecting pipe 33 and the metal hose 38 are detachably connected with a tight connection structure 2 42 at the connection point. The tight connection structure 1 41 facilitates the connection of the fluidized purge structure 25 and the connecting pipe 33, and also facilitates disassembly. The tight connection structure 2 42 facilitates the connection of the connecting pipe 33 and the metal hose 38, and also facilitates disassembly.
[0031] The electric actuator 30 is connected to the pressure regulating controller 49. A support frame 43 is mounted on the valve stem 4. A plurality of connecting screws 44 are detachably connected to the support frame 43. The plurality of connecting screws 44 are detachably connected to the valve body 1. The support frame 43 stabilizes the valve stem 4 and can be easily removed and installed via the connecting screws 44.
[0032] In the present invention, the valve stem 4 and the valve core 8 can be easily disassembled and installed. Specifically, the protrusion 9 on the valve core 8 is first fixed to the groove 6 on the connecting base 5, and then fixed to the protrusion 9 and the multiple connecting holes 1 7 and multiple connecting holes 2 10 on the connecting base 5 by multiple plug rods 11. The groove plate 14 is installed on the valve core 8 by connecting bolts 15, which plays a protective role when the valve core 8 is in operation. The groove plate 14 also increases the downward pressure area of the valve core 8. Multiple pressure plates 17 and soft convex balls 18 on the pressure plate 17 are added to the traditional valve plate 16, which increases the sealing effect between the valve plate 16 and the valve stem 4. The sealing effect of the connection position is good and there will be no ash or smoke leakage. The fluidized purge structure 25 drives the piston to move by alternately introducing the reversing operating air source, which drives the slide block to slide left and right. The fuel and purge gas are alternately turned on and off to achieve fuel reversal and purging. When the oil is switched, the oil is connected to the oil inlet of the slide block and the spray gun, and the slide block is shifted to close the air inlet; when the oil is shut off for purging, the air is connected to the air inlet of the slide block and the spray gun, and the slide block is shifted to close the oil inlet. This ensures the effective switching of fuel and purge gas, thereby achieving cleaning and maintenance of the system. The internal purge pipe 31 extends to the inside of the valve body 1 to the valve plate 16 and is provided with an explosion hole 32 to increase the purge efficiency. The soft pendulum pieces 47 evenly distributed on the connecting strip 46 can increase the fluidity during purging. The valve head 2 adopts a conical structure to ensure that the overall deformation is reduced after heating. There is a clearance fit between the valve head 2 and the valve port, and the valve can be opened and closed flexibly without jamming and tightly closed. The valve body 1 and the valve stem 4 adopt a reasonable sealing method to ensure that no ash or air leaks out during operation. The conical valve head is equipped with a fluidizing air purge system. Metal hoses are used for the airway valves and piping, facilitating connection of the system to the fluidizing air main pipe and the boiler's slag discharge port. The conical valve stem seal is sealed with compressed air, which is supplied by metal piping and connected to the system's compressed air piping. The conical valve stem is water-cooled, with DN25 metal hoses and connectors used for the cooling water supply and return. This not only ensures long-term operation at high temperatures but also allows for regulation of ash discharge.
[0033] The observation tube 22, upper viewing mirror 24, and lower viewing mirror 23 allow observation of the position of the valve head 2, valve stem 4, and valve core 8, as well as slag discharge. Both the upper viewing mirror 24 and the lower viewing mirror 23 function as magnifying glasses, enabling amplification of internal conditions. These viewing tubes 22, upper viewing mirror 24, and lower viewing mirror 23 are all treated to withstand high-temperature radiation, preventing injury from accidental entry due to a loose valve closure. The rotating disk 20 rotates under impact to clean the bottom and vicinity of the valve plate 16, filtering liquid through the lower filter plate 21.
[0034] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A slag discharge control valve structure, comprising a valve body (1), a valve plate (16), a fluidizing and purge structure (25) and a sealing and compression structure (26), characterized in that: The valve body (1) has a built-in valve stem (4), a valve core (8) is installed at the bottom of the valve stem (4), a conical valve head (2) is installed at the top of the valve body (1), the conical valve head (2) is connected to a fluidization purge structure (25), the conical valve head (2) and the valve body (1) are detachably installed through a sealing cover structure (3), the valve stem (4) is connected to a sealing compression structure (26), the valve stem (4) is provided with a water supply (28) and a water return (29), the conical valve head (2) is provided with an electric actuator (30), the valve stem (4) ) is fixed with a connecting base (5) at the bottom, a card slot (6) is provided at the bottom of the connecting base (5), a convex seat (9) is provided on the top of the valve core (8), a plurality of connecting holes (7) and connecting holes (10) are respectively provided on the connecting base (5) and the convex seat (9), a plurality of connecting holes (7) and corresponding plurality of connecting holes (10) are engaged with matching plug rods (11), a plurality of plug rods (11) are installed with tight cap pads (12), a core seat (13) is provided at the bottom of the valve core (8), and the core seat (13) is provided with a plurality of connecting holes (7) and corresponding plurality of connecting holes (10). A groove plate (14) is provided at the bottom, and the core seat (13) and the groove plate (14) are detachably connected to the connecting bolts (15). A plurality of pressure plates (17) are installed on the valve plate (16), and a plurality of soft convex balls (18) are provided on the pressure plates (17). The bottom of the fluidized purge structure (25) is connected to two inner sweeping pipes (31), and the two inner sweeping pipes (31) are evenly distributed with explosion holes (32). The two inner sweeping pipes (31) are provided with connecting strips (46), and the two connecting strips (46) are evenly distributed with soft swing pieces. (47), the fluidized purge structure (25) is connected to a connecting pipe (33), the connecting pipe (33) is respectively connected to a connecting pipe (34) and a metal hose (38), the metal hose (38) is connected to the lower slag pipe (27), the metal hose (38) is connected to the sealing compression structure (26), the connecting pipe (34) is connected to the purge box (36), the connecting pipe (34) is provided with a switch valve (35), and the purge box (36) is connected to a flow controller (48), a pressure regulating controller (49) and a transmitter (50).
2. The slag discharge control valve structure according to claim 1, characterized in that: An observation tube (22) is installed on the outside of the valve stem (4) near the edge, and an upper viewing mirror (24) and a lower viewing mirror (23) are respectively provided at the top and bottom of the observation tube (22). A pressure cover (45) is provided near the conical valve head (2) of the observation tube (22), and the observation tube (22), the upper viewing mirror (24) and the lower viewing mirror (23) are all treated to resist high-temperature heat radiation.
3. The slag discharge control valve structure according to claim 1, characterized in that: A connecting rod (19) is installed at the bottom of the valve plate (16), a rotating disk (20) is provided on the connecting rod (19), and a lower filter plate (21) is detachably connected to the bottom of the connecting rod (19) away from the valve plate (16).
4. The slag discharge control valve structure according to claim 1, characterized in that: A slag pipe filter screen (39) is detachably connected to the lower slag pipe (27), and a lower filter pipe (40) is passed through the right bottom of the slag pipe filter screen (39).
5. The slag discharge control valve structure according to claim 1, characterized in that: The purge box (36) is provided with a through pipe (37), and a filter is provided in the through pipe (37).
6. The slag discharge control valve structure according to claim 1, characterized in that: The fluidized purge structure (25) and the connecting pipe (33) are detachably connected to a first tight connection structure (41), and the connecting pipe (33) and the metal hose (38) are detachably connected to a second tight connection structure (42).
7. The slag discharge control valve structure according to claim 1, characterized in that: The electric actuator (30) is connected to a voltage regulating controller (49).
8. The slag discharge control valve structure according to claim 1, characterized in that: A support frame (43) is installed on the valve stem (4), and a plurality of connecting screws (44) are detachably connected to the support frame (43), and the plurality of connecting screws (44) can be detachably connected to the valve body (1).