Double-turning-plate air locker used in flue negative pressure area
By designing a double-flip airlock, the angle of the flip plate is adjusted using a counterweight and an adjusting nut. Combined with the central cavity structure, this solves the problem of poor ash discharge under negative pressure caused by a single-flip airlock, achieving automatic ash discharge and sealing with low air leakage rate, and adapting to the ash discharge needs of different ash types.
Patent Information
- Application Number
- CN202423178793.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2034-12-23
AI Technical Summary
When the ash hopper is under negative pressure, the single-flip airlock cannot automatically discharge ash or will draw in air when it is opened, causing the ash to be drawn back into the flue, which affects the ash discharge efficiency and the normal operation of the system.
The system employs a double-flip airlock, consisting of an upper and lower flap. The opening angle and weight of the flaps are adjusted by a counterweight and an adjusting nut. Combined with the intermediate cavity structure as a buffer zone, the flaps open and close alternately, preventing accumulated ash from being re-inhaled into the flue.
Automatic ash removal with low air leakage rate is achieved under negative pressure environment to prevent dust from re-entering the flue, ensure normal system operation and sealing, and adapt to the ash removal needs of different ash types.
Smart Images
Figure CN223691071U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to ash fall all pressure relief device field, concretely relates to a double flap lock air device for flue negative pressure area. BACKGROUND
[0002] Ash bucket negative pressure refers to the air pressure inside the ash bucket is lower than the external atmospheric pressure. The main reason for generating negative pressure is usually the induced draft fan in the system works, which will cause the pressure in the connected ash bucket to decrease during the suction of dust-containing gas. The negative pressure state will affect the normal ash discharge of the ash bucket. For example, it will interfere with the operation of the ash discharge device like single flap lock air device, and cannot discharge ash smoothly. Moreover, if the negative pressure is not controlled well, external air may be sucked into the ash bucket, which not only affects the collection efficiency of dust, but also may cause the dust to be raised again and enter other equipment pipelines, affecting the normal operation of the whole system.
[0003] The working principle of single flap lock air device is to use gravity and ash column pressure to make ash fall through the flap, while preventing air leakage. In the case of negative pressure in the ash bucket, the pressure difference between the inside and outside will cause the flap to be attracted inward. This may cause the flap to close tightly and cannot be normally opened by the self-weight of the ash to realize ash discharge.
[0004] In addition, if the flap is accidentally opened, for example, in the case of equipment vibration, due to the effect of negative pressure, air will quickly flow into the ash bucket. This incoming air may wrap the ash and re-enter the flue, so that the single flap lock air device often cannot realize automatic ash discharge or cannot discharge the ash because the air is sucked into the flue in the opening moment. INVENTION CONTENTS
[0005] The utility model discloses a double flap lock air device for flue negative pressure area to solve the problem that the single flap lock air device often cannot realize automatic ash discharge or cannot discharge the ash because the air is sucked into the flue in the opening moment when the ash bucket is in negative pressure state.
[0006] The technical scheme of the utility model is:
[0007] A double flap lock air device for flue negative pressure area, which comprises a valve body, an ash inlet is formed in the top of the valve body, an ash outlet is formed in the top of the valve body, an upper flap and a lower flap are respectively installed in the valve body, and the upper flap and the lower flap are arranged in a inclined surface structure in the valve body, and when the upper flap and the lower flap are in a closed state, the upper flap and the lower flap are in a parallel structure.
[0008] The tail of the upper and lower turning plates is fixedly connected with the shaft body of the door shaft, the two ends of the door shaft pass through the side of the valve body, and the shaft surface of the door shaft is rotatably connected between the bearing and the bearing sleeve, the shaft surface of any end of the door shaft close to the end is fixedly connected with a sleeve, the sleeve is fixed on the shaft surface of the door shaft, and the outer cylinder surface of the sleeve is fixedly connected with an adjustable counterweight, which rotates synchronously with the counterweight when the door shaft rotates, and the upper and lower turning plates are automatically reset after being turned over by the counterweight.
[0009] Preferably, the counterweight includes a counterweight rod, a counterweight weight, an upper adjusting nut and a lower adjusting nut.
[0010] The counterweight rod is in a threaded structure, the counterweight weight is sleeved on the counterweight rod, the upper adjusting nut and the lower adjusting nut are screwed on the counterweight rod, and the position of the counterweight weight on the counterweight rod is changed by adjusting the upper adjusting nut and the lower adjusting nut.
[0011] Preferably, the top end of the counterweight rod is fixedly connected with the outer cylinder surface of the sleeve, the upper adjusting nut and the lower adjusting nut on the counterweight rod adjust the length of the force arm of the counterweight weight on the counterweight rod, so as to adjust the weight of the accumulated ash when the upper and lower turning plates are automatically opened, and the ash hopper angle is adjusted.
[0012] Preferably, the upper and lower turning plates have a cavity structure with a storage space, the lower turning plate is in a closed state when there is no ash in the cavity structure, and the upper turning plate is opened when the weight of the accumulated ash in the hopper reaches a critical value, and the accumulated ash gradually flows into the cavity structure.
[0013] Preferably, the upper and lower turning plates have an L-shaped structure, and the horizontal plate surface and the longitudinal plate surface of the upper and lower turning plates are respectively provided with mounting holes.
[0014] Preferably, rivets are inserted into the mounting holes in the horizontal plate surface of the upper and lower turning plates.
[0015] An asbestos plate is laid on the horizontal plate surface of the upper and lower turning plates, and a galvanized sheet is arranged above the asbestos plate, and the asbestos plate and the galvanized sheet are fixed on the horizontal plate surface of the upper and lower turning plates by the rivets.
[0016] Preferably, bolts are inserted into the mounting holes in the longitudinal plate surface of the upper and lower turning plates, and the longitudinal plate surface of the upper and lower turning plates is combined with the door shaft by the bolts.
[0017] Preferably, the door shaft is a hollow shaft structure, and the middle part of the door shaft is a planar structure, and the planar structure is provided with mounting holes corresponding to the upper turning plate and the lower turning plate; when the longitudinal plate surface of the upper turning plate and the lower turning plate is attached to the planar part of the door shaft, the door shaft is detachably connected with the upper turning plate and the lower turning plate through bolts.
[0018] Preferably, the upper turning plate and the lower turning plate form an angle of 90 degrees with the counterweight rod of the counterweight.
[0019] Preferably, the valve body is provided with an inspection door.
[0020] Compared with the prior art, the utility model has the following effects:
[0021] The utility model discloses a asbestos board is arranged on the surface of the upper turning plate and the lower turning plate, and the asbestos board can be arranged to realize soft contact between the cylindrical body of the square ash hopper in the valve body and the upper turning plate and the lower turning plate, strengthen the sealing property of the combination surface between the upper turning plate and the lower turning plate and the square cylindrical body, and reduce the rebound of the upper turning plate and the lower turning plate when closing and the occurrence of air leakage.
[0022] The utility model discloses a double turning plate structure with a certain storage space in the middle, and when there is no ash in the cavity structure, the lower turning plate is in the closed state; when the accumulated ash in the upper hopper reaches the critical weight, the upper turning plate opens, and the accumulated ash gradually flows into the cavity; when the accumulated ash in the cavity reaches a certain amount, the lower turning plate opens to release the ash, and even if the upper turning plate is in the open state, it will be closed first due to the negative pressure suction in the ash hopper, so that the lower turning plate can smoothly release the ash and then return to the closed state.
[0023] The utility model discloses a double turning plate structure with a certain storage space in the middle, and when there is no ash in the cavity structure, the lower turning plate is in the closed state; when the accumulated ash in the upper hopper reaches the critical weight, the upper turning plate opens, and the accumulated ash gradually flows into the cavity; when the accumulated ash in the cavity reaches a certain amount, the lower turning plate opens to release the ash, and even if the upper turning plate is in the open state, it will be closed first due to the negative pressure suction in the ash hopper, so that the lower turning plate can smoothly release the ash and then return to the closed state.
[0024] The tail part of the upper turning plate and the lower turning plate is combined with the door shaft through bolts, so that stress deformation caused by welding is prevented, the sealing property is affected, and if the upper turning plate and the lower turning plate are corroded or overheated and deformed during use, the upper turning plate and the lower turning plate can be conveniently replaced.
[0025] The counterweight is composed of the counterweight rod, the counterweight weight, the upper adjusting nut and the lower adjusting nut, the counterweight weight can adjust the length of the force arm in the counterweight rod structure through the upper adjusting nut and the lower adjusting nut, so that the weight of the accumulated ash when the upper turning plate and the lower turning plate are automatically turned open is adjusted, and different ash hoppers, different materials and densities, such as coal ash and biomass ash, can be adjusted. BRIEF DESCRIPTION OF DRAWINGS
[0026] Figure 1 is a structural schematic view of the utility model;
[0027] Figure 2 is Figure 1 is a top view of the utility model;
[0028] Figure 3 is Figure 1 is a partial enlarged view of A part in the utility model;
[0029] Figure 4 is a structural schematic view of the counterweight hammer;
[0030] Figure 5 is a structural schematic view of the lower layer flap;
[0031] Figure 6 is a front view of the lower layer flap;
[0032] Figure 7 is a connecting schematic view of the lower layer flap and the asbestos board;
[0033] In the drawing: 1, valve body, 2, ash inlet, 3, ash outlet, 4, upper layer flap, 5, lower layer flap, 6, door shaft, 7, bearing and bearing sleeve, 8, sleeve, 9, counterweight hammer, 10, cavity structure, 11, mounting hole, 12, asbestos board, 13, thin galvanized sheet, 14, inspection door, 15, bolt, 91, counterweight rod, 92, counterweight weight, 93, upper adjusting nut, 94, lower adjusting nut. DETAILED DESCRIPTION
[0034] In order to make the purpose, technical scheme and advantages of the utility model embodiment clearer, the technical scheme in the embodiment will be clearly and completely described below in combination with the drawings in the utility model embodiment, and the following embodiments are used to illustrate the utility model, but not to limit the scope of the utility model.
[0035] Specific implementation one: in combination with Figure 1 — Figure 3 The utility model discloses a double-flap gas lock for flue negative pressure area, which comprises a valve body 1, an ash inlet 2 is formed in the top of the valve body 1, an ash outlet 3 is formed in the top of the valve body 1, an upper layer flap 4 and a lower layer flap 5 are respectively installed in the valve body 1, and the upper layer flap 4 and the lower layer flap 5 are arranged in a slope structure in the valve body 1, and the upper layer flap 4 and the lower layer flap 5 are in parallel structure when the upper layer flap 4 and the lower layer flap 5 are in a closed state.
[0036] The tail of the upper and lower turning plates 4 and 5 is fixedly connected with the shaft body of the door shaft 6, the two ends of the door shaft 6 pass through the side of the valve body 1, and the shaft surface of the door shaft 6 is rotatably connected with the bearing and the bearing sleeve 7, the shaft surface of the door shaft 6 near the end is fixedly connected with the sleeve 8, and the sleeve 8 is fixed on the shaft surface of the door shaft 6, the outer cylinder surface of the sleeve 8 is fixedly connected with the adjustable counterweight hammer 9, the door shaft 6 drives the counterweight hammer 9 to rotate synchronously when rotating, and the counterweight hammer 9 makes the upper and lower turning plates 4 and 5 automatically reset after being turned over.
[0037] The upper and lower turning plates 4 and 5 adopt double turning plates to alternately open and close, the intermediate cavity structure is used as a negative pressure buffer area, the flue in the negative pressure area is used for discharging ash, and the accumulated ash is prevented from being reabsorbed into the flue, the air leakage rate is low during operation, the reserved space is sufficient, and the sealing plate can be fully opened or closed to guarantee good passability.
[0038] Specific implementation method two: in combination with Figure 4 It is explained that the embodiment is a double turning plate air lock for a flue negative pressure area, the counterweight hammer 9 includes a counterweight rod 91, a counterweight weight 92, an upper adjusting nut 93 and a lower adjusting nut 94.
[0039] The counterweight rod 91 is a threaded structure, the counterweight weight 92 is sleeved on the counterweight rod 91, the counterweight weight 92 is arranged between the upper adjusting nut 93 and the lower adjusting nut 94, the upper adjusting nut 93 and the lower adjusting nut 94 are screwed on the counterweight rod 91 through the threaded structure, and the position of the counterweight weight 92 on the counterweight rod 91 is changed through adjustment of the upper adjusting nut 93 and the lower adjusting nut 94.
[0040] Specific implementation method three: in combination with Figure 4 It is explained that the embodiment is a double turning plate air lock for a flue negative pressure area, the top end of the counterweight rod 91 is fixedly connected with the outer cylinder surface of the sleeve 8, the upper adjusting nut 93 and the lower adjusting nut 94 on the counterweight rod 91 adjust the length of the force arm of the counterweight weight 92 on the counterweight rod 91, so as to adjust the weight of the ash carried by the upper and lower turning plates 4 and 5 when the upper and lower turning plates 4 and 5 are automatically turned open, and different ash hopper angles are adjusted.
[0041] The counterweight hammer is composed of the counterweight rod 91, the counterweight weight 92, the upper adjusting nut 93 and the lower adjusting nut 94, the counterweight weight 92 can adjust the length of the force arm in the counterweight rod 91 structure through the upper adjusting nut 93 and the lower adjusting nut 94, so as to adjust the weight of the ash carried by the upper and lower turning plates 4 and 5 when the upper and lower turning plates 4 and 5 are automatically turned open, and different ash hopper angles, different textures and densities such as coal ash and biomass ash are adjusted.
[0042] Specific implementation method four: in combination with the drawings Figure 4The embodiment is described, and the double-flap air lock used in the flue negative pressure area of the embodiment has a cavity structure 10 with a storage space between the upper flap 4 and the lower flap 5. When there is no ash in the cavity structure 10, the lower flap 5 is in a closed state. When the accumulated ash in the hopper of the upper flap 4 reaches a critical weight, the upper flap 4 opens to allow the ash to gradually flow into the cavity structure 10.
[0043] Specific implementation five: in combination Figure 5 — Figure 7 The embodiment is described, and the double-flap air lock used in the flue negative pressure area of the embodiment has a cavity structure 10 with a storage space between the upper flap 4 and the lower flap 5. When there is no ash in the cavity structure 10, the lower flap 5 is in a closed state. When the accumulated ash in the hopper of the upper flap 4 reaches a critical weight, the upper flap 4 opens to allow the ash to gradually flow into the cavity structure 10.
[0044] The upper flap 4 and the lower flap 5 are arranged in an L-shaped structure, which facilitates the disassembly and installation of the tail vertical plate of the upper flap 4 and the lower flap 5 and the door shaft 6. The installation hole 11 is inserted with a bolt 15, which facilitates the installation of the upper flap 4 and the lower flap 5 between the door shaft 6.
[0045] Specific implementation six: in combination Figure 5 — Figure 7 The embodiment is described, and the double-flap air lock used in the flue negative pressure area of the embodiment has a cavity structure 10 with a storage space between the upper flap 4 and the lower flap 5. When there is no ash in the cavity structure 10, the lower flap 5 is in a closed state. When the accumulated ash in the hopper of the upper flap 4 reaches a critical weight, the upper flap 4 opens to allow the ash to gradually flow into the cavity structure 10.
[0046] The upper surface of the transverse plate of the upper flap 4 and the lower flap 5 is paved with an asbestos board 12, and the upper surface of the asbestos board 12 is provided with a thin galvanized sheet 13. The asbestos board 12 and the thin galvanized sheet 13 are fixed on the transverse plate of the upper flap 4 and the lower flap 5 by rivets.
[0047] The asbestos board 12 is arranged on the surface of the upper flap 4 and the lower flap 5. The asbestos board 12 can be used to achieve soft contact between the cylindrical body of the square ash hopper in the valve body and the upper flap 4 and the lower flap 5, strengthen the sealing performance of the combined surface between the upper flap 4 and the lower flap 5 and the square cylindrical body, and reduce the rebound of the upper flap 4 and the lower flap 5 when they are closed, thereby reducing the occurrence of air leakage.
[0048] Specific implementation seven: in combination Figure 1 — Figure 7 The embodiment is described, and the double-flap air lock used in the flue negative pressure area of the embodiment has a cavity structure 10 with a storage space between the upper flap 4 and the lower flap 5. When there is no ash in the cavity structure 10, the lower flap 5 is in a closed state. When the accumulated ash in the hopper of the upper flap 4 reaches a critical weight, the upper flap 4 opens to allow the ash to gradually flow into the cavity structure 10.
[0049] The upper and lower flaps are bolted to the door hinges to prevent stress deformation caused by welding, which could affect the sealing performance. At the same time, it is also convenient to replace the upper and lower flaps if they are corroded or deformed due to overheating during use.
[0050] Specific implementation method eight: Combination Figure 1 — Figure 7 This embodiment describes a double-flip airlock for use in a negative pressure zone of a flue. The door hinge 6 is a hollow shaft structure, and the middle part of the door hinge 6 is a flat structure. The flat structure has mounting holes corresponding to the upper flap 4 and the lower flap 5. When the longitudinal plate surfaces of the upper flap 4 and the lower flap 5 are in contact with the flat surface of the door hinge 6, the door hinge 6 is detached and connected to the upper flap 4 and the lower flap 5 by bolts 15.
[0051] The above structure facilitates the disassembly of the upper flap 4 and the lower flap 5 from the door hinge 6, and makes it easy to replace the upper flap 4 and the lower flap 5.
[0052] Specific Implementation Method Nine: Combining Figure 1 — Figure 7 This embodiment describes a double-flip airlock device used in a flue negative pressure zone, wherein the upper flap 4 and the lower flap 5 form a 90-degree angle with the counterweight rod 91 of the counterweight hammer 9.
[0053] With the above structure, when there is no ash in the cavity structure 10, the lower flap 5 is in the closed state. When the weight of the ash accumulated in the upper hopper reaches the critical point, the upper flap 4 opens and the ash gradually flows into the cavity. When the amount of ash accumulated in the cavity structure 10 reaches a certain amount, the lower flap 5 opens to discharge ash. At this time, even if the upper flap 4 is in the open state, it will close first due to the negative pressure suction in the ash hopper, so that the lower layer can be discharged smoothly and then return to the closed state.
[0054] Specific Implementation Method Ten: Combining Figure 1 — Figure 7 This embodiment describes a double-flip airlock used in a flue negative pressure zone, wherein the valve body 1 has an inspection door 14.
[0055] An upper flap 4 and a lower flap 5 are installed inside the valve body 1, forming a double flap structure with a certain storage space in between. When there is no ash in the cavity structure 10, the lower flap 5 is in the closed state. When the weight of the ash accumulated in the upper hopper reaches the critical point, the upper flap 4 opens and the ash gradually flows into the lower cavity structure 10. When the amount of ash accumulated in the cavity structure 10 reaches a certain amount, the lower flap 5 opens to discharge ash through the counterweight 9. At this time, even if the upper flap 4 is in the open state, it will close first due to the negative pressure suction in the ash hopper, so that the lower flap 4 can discharge ash smoothly and then return to the closed state.
[0056] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above with a preferred embodiment, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the disclosed technical content without departing from the technical solution of the present application, and make equivalent embodiments with equivalent changes. Any simple modification, equivalent replacement and improvement of the above embodiments, which does not depart from the technical solution of the present application, and is within the spirit and principles of the present application, are still within the protection scope of the technical solution of the present application.
Claims
1. A double flap lock hopper for use in the negative pressure zone of a flue, comprising a valve body (1), a top of the valve body (1) being provided with an ash inlet (2), and a top of the valve body (1) being provided with an ash outlet (3), characterized in that, The valve body (1) is respectively provided with an upper flap (4) and a lower flap (5), and the upper flap (4) and the lower flap (5) are arranged in a slope structure in the valve body (1), and the upper flap (4) and the lower flap (5) are in parallel when the upper flap (4) and the lower flap (5) are in a closed state. The tail of the upper flap (4) and the lower flap (5) is fixedly connected with the shaft body of the door shaft (6), the two ends of the door shaft (6) pass through the side of the valve body (1), and the shaft surface of the door shaft (6) is rotatably connected with the bearing and the bearing sleeve (7), and the shaft surface of the door shaft (6) near the end is fixedly connected with the sleeve (8), and the sleeve (8) is fixed on the shaft surface of the door shaft (6), and the outer cylinder surface of the sleeve (8) is fixedly connected with the adjustable counterweight (9), when the door shaft (6) rotates, the counterweight (9) rotates synchronously, and the upper flap (4) and the lower flap (5) are automatically reset after being turned over by the counterweight (9).
2. The double flap lockhopper for use in the flue negative pressure zone according to claim 1, characterized in that, The counterweight (9) comprises a counterweight rod (91), a counterweight weight (92), an upper adjusting nut (93) and a lower adjusting nut (94). The counterweight rod (91) is in a threaded structure, the counterweight weight (92) is sleeved on the counterweight rod (91), the counterweight weight (92) is arranged between the upper adjusting nut (93) and the lower adjusting nut (94), and the upper adjusting nut (93) and the lower adjusting nut (94) are screwed on the counterweight rod (91) through the threaded structure, and the position of the counterweight weight (92) on the counterweight rod (91) is changed by adjusting the upper adjusting nut (93) and the lower adjusting nut (94).
3. The double flap lockhopper for use in the flue negative pressure zone according to claim 2, characterized in that, The top end of the counterweight rod (91) is fixedly connected with the outer cylinder surface of the sleeve (8), the upper adjusting nut (93) and the lower adjusting nut (94) on the counterweight rod (91) adjust the length of the force arm of the counterweight weight (92) on the counterweight rod (91), so that the weight of the ash carried by the upper flap (4) or the lower flap (5) when the upper flap (4) or the lower flap (5) is automatically opened is adjusted, and different ash hopper angles are adjusted.
4. The double flap lockhopper for use in the flue negative pressure zone according to claim 3, characterized in that, The upper flap (4) and the lower flap (5) have a cavity structure (10) with a storage space, the lower flap (5) is in a closed state when the cavity structure (10) is empty, and the upper flap (4) is opened when the accumulated ash weight in the hopper reaches a critical value, and the accumulated ash gradually flows into the cavity structure (10).
5. Double flap lockhopper for use in the flue underpressure zone according to claim 3 or 4, characterized in that, The upper flap (4) and the lower flap (5) are in an L-shaped structure, and the horizontal plate surface and the longitudinal plate surface of the upper flap (4) and the lower flap (5) are respectively provided with mounting holes (11).
6. Double flap lockhopper for use in the flue underpressure zone according to claim 3 or 4, characterized in that, The mounting holes (11) on the horizontal plate surface of the upper flap (4) and the lower flap (5) are inserted with rivets; The horizontal plate surface of the upper flap (4) and the lower flap (5) is paved with an asbestos board (12), and the upper side of the asbestos board (12) is provided with a galvanized sheet (13), and the asbestos board (12) and the galvanized sheet (13) are fixed on the horizontal plate surface of the upper flap (4) and the lower flap (5) by the rivets.
7. The double flap puffer for use in the flue underpressure zone according to claim 6, characterized in that, The bolt (15) is inserted into the mounting hole on the longitudinal plate surface of the upper and lower turning plates (4, 5), and the longitudinal plate surface of the upper and lower turning plates (4, 5) is combined with the door shaft (6) through the bolt (15).
8. The double flap puffer for use in the flue underpressure zone according to claim 7, characterized in that The door shaft (6) is a hollow shaft structure, and the middle part of the door shaft (6) is a planar structure, and the planar structure is provided with mounting holes corresponding to the upper and lower turning plates (4, 5); when the longitudinal plate surface of the upper and lower turning plates (4, 5) is attached to the planar structure of the door shaft (6), the door shaft (6) is detachably connected with the upper and lower turning plates (4, 5) through the bolt (15).
9. The double flap puffer for use in the flue underpressure zone according to claim 8, characterized in that, The angle between the upper and lower turning plates (4, 5) and the counterweight rod (91) of the counterweight (9) is 90 degrees.
10. The double flap lockhopper for use in flue negative pressure zone according to claim 1, characterized in that, The valve body (1) is provided with an inspection door (14).