CN116443587A - Flap valve and pneumatic ash conveying equipment - Google Patents
Flap valve and pneumatic ash conveying equipment Download PDFInfo
- Publication number
- CN116443587A CN116443587A CN202310640034.6A CN202310640034A CN116443587A CN 116443587 A CN116443587 A CN 116443587A CN 202310640034 A CN202310640034 A CN 202310640034A CN 116443587 A CN116443587 A CN 116443587A
- Authority
- CN
- China
- Prior art keywords
- flap
- flap valve
- swing arm
- valve according
- inlet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000012530 fluid Substances 0.000 claims abstract description 4
- 230000002441 reversible effect Effects 0.000 claims abstract description 3
- 239000011324 bead Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 abstract description 26
- 230000005484 gravity Effects 0.000 abstract description 6
- 239000002956 ash Substances 0.000 description 16
- 239000000843 powder Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/40—Feeding or discharging devices
- B65G53/46—Gates or sluices, e.g. rotary wheels
- B65G53/4608—Turnable elements, e.g. rotary wheels with pockets or passages for material
Abstract
The invention relates to the field of pneumatic ash conveying, and discloses a flap valve and pneumatic ash conveying equipment, wherein the flap valve comprises a shell (7) with an inlet (3) at the upper end and an outlet (8) at the lower end, a flap (5) and an air lifting cap (4), the flap (5) is arranged in the shell (7) in a reversible manner, a through hole is formed in the flap (5), and the air lifting cap (4) is arranged at the through hole to be in fluid communication with two sides of the flap (5). Through the technical scheme, the through holes and the air lifting caps are formed in the turning plate, so that the pressure on two sides can be balanced, and the problem that the turning plate cannot be turned over and opened under the action of gravity of materials due to unbalanced pressure is avoided.
Description
Technical Field
The invention relates to the field of pneumatic ash conveying, in particular to a flap valve and pneumatic ash conveying equipment.
Background
In the pneumatic ash conveying field, various feeding and gas locking feeding devices comprise a gas locking feeder, a heavy hammer flap valve and the like. The air locking feeder is suitable for the conditions that the pressure in a pneumatic conveying pipeline is low, material particles are not too fine, and the star-shaped rotor rotates under the power of a motor and a speed reducer to turn the materials to the pneumatic conveying pipeline one by one. The heavy hammer flap valve is suitable for the conditions of lower pressure of the pneumatic conveying pipeline and larger material particles, materials are gradually piled up above the flap valve, and when the weight of the materials is larger than the weight of the pendulum of the flap valve and the counter force of the bottom pneumatic pipeline, the flap valve opens the materials to enter the pneumatic conveying pipeline for material transportation under the action of the gravity.
When the flap valve is applied to a scene with higher pneumatic conveying pressure or smaller material volume weight, the bottom air pressure is far greater than the material weight, so that the flap valve cannot be normally opened.
Disclosure of Invention
The invention aims to overcome the defects existing in the prior art and the flap valve can not be normally opened during pneumatic conveying.
In order to achieve the above object, an aspect of the present invention provides a flap valve, wherein the flap valve includes a housing having an inlet at an upper end and an outlet at a lower end, a flap rotatably disposed in the housing, the flap being formed with a through hole, and an air-lifting cap disposed at the through hole to be in fluid communication with both sides of the flap.
In some embodiments, the gas cap is inserted into the through hole from a side of the flap toward the inlet.
In some embodiments, the flap valve includes a swing arm connected to the flap, the connection point of the swing arm and the flap being rotatably hinged to the housing by a hinge shaft.
In some embodiments, a counterweight is provided on the swing arm.
In some embodiments, the counterweight is movable along the length of the swing arm.
In some embodiments, in the closed state, the flap extends obliquely downward from the hinge axis, and the swing arm extends obliquely downward from the hinge axis.
In some embodiments, the flap valve comprises two flaps arranged symmetrically.
In some embodiments, a bead is provided in the housing, and in the closed state, a surface of the flap facing the inlet engages the bead.
In some embodiments, the inlet and the outlet are provided with flanges, respectively.
On the other hand, the scheme also provides pneumatic ash conveying equipment, wherein the pneumatic ash conveying equipment is provided with the flap valve.
Through the technical scheme, the through holes and the air lifting caps are formed in the turning plate, so that the pressure on two sides can be balanced, and the problem that the turning plate cannot be turned over and opened under the action of gravity of materials due to unbalanced pressure is avoided.
Drawings
FIG. 1 is a schematic structural view of a prior art flap valve;
FIG. 2 is a schematic structural view of a flap valve according to an embodiment of the present solution;
FIG. 3 is a force analysis diagram of a flap valve according to an embodiment of the present disclosure;
fig. 4 is a schematic structural view of the pneumatic ash conveying apparatus according to this embodiment.
Description of the reference numerals
1 balancing weight 2 swing arm
3-inlet 4-liter gas cap
5 turning plate 6 pressing strip
7 housing 8 outlet
9 flap valve 10 fan
11 buffer bin 12 ash bin
13 three-way valve
Detailed Description
The following describes specific embodiments of the present invention in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention.
In the present invention, unless otherwise indicated, terms of orientation such as "upper and lower" are used to generally refer to relative positional relationships in the use state, and are merely for the purpose of more clearly describing the present invention, and should not be construed as being particularly limited thereto.
As shown with reference to fig. 2 and 3, the present solution provides a flap valve, wherein the flap valve comprises a housing 7 having an inlet 3 at an upper end and an outlet 8 at a lower end, a flap 5 being reversibly arranged in the housing 7, and a gas cap 4, the flap 5 being formed with a through hole at which the gas cap 4 is arranged to be in fluid communication with both sides of the flap 5.
The housing 7 is formed in a substantially tubular shape, an inlet 3 is provided at an upper end thereof, an outlet 8 is provided at a lower end thereof, the flap 5 is provided in the housing 7 so as to be reversible, and the flap 5 is rotatable relative to the housing 7 to open or close the flap valve.
After the material enters the housing 7 from the inlet 3, the material is carried on the upper surface of the flap 5, and when the material exceeds a certain weight, the flap 5 is turned down to open the flap valve, thereby allowing the material to fall.
In some cases, when the flap 5 is closed, the pressure on both sides of the flap 5 is different, the pressure on the lower side is greater than the pressure on the upper side, and if the pressure difference is too great, the gravity of the material cannot drive the flap 5 to turn downwards.
In addition, the through holes are formed in the turning plate 5, the lower side and the upper side of the turning plate 5 are allowed to be communicated so as to balance pressure, and the air lifting caps 4 are arranged at the through holes, so that materials are prevented from directly entering the through holes or blocking the through holes.
In this scheme, set up through-hole and lift cap on turning over the board to can balance the pressure of both sides, avoid the unbalanced problem that leads to turning over the board and can not overturn under the gravity effect of material and open.
In some embodiments, the gas cap 4 is inserted into the through hole from the side of the flap 5 facing the inlet 3. Part of the lift cap 4 is inserted into the through hole, and the other part is positioned on the upper side of the turning plate 5, so that the material can be prevented from falling into the through hole in the lift cap 4 when the two sides of the turning plate 5 are communicated. In the embodiment of the air lift cap 4 inserted into the through hole, the air lift cap 4 and the turning plate 5 can be in interference fit or in a threaded connection or welding connection mode. In other embodiments, the gas cap 4 may be disposed on the upper surface of the flap 5 without being inserted into the through hole 5, and the gas cap 4 may be welded to the flap 5.
In addition, the flap valve comprises a swing arm 2 connected to the flap 5, and the connection point of the swing arm 2 and the flap 5 is rotatably hinged to the housing 7 through a hinge shaft. The swing arm 2 may extend from the inside of the housing 7 to the outside, and a hinge shaft (not shown) extends horizontally and is provided in the inside of the housing 7, and the swing arm 2 and the flap 5 are hinged to the hinge shaft at a connection position so as to be rotatable about the hinge shaft. When the material is not carried, the gravity moment of the swing arm 2 and the turning plate 5 is approximately balanced, so that the turning plate 5 is in a closed state, and when the turning plate 5 carries the material, the moment on two sides of the hinge shaft is gradually unbalanced, so that the turning plate 5 turns downwards.
In addition, a balancing weight 1 is arranged on the swing arm 2. The balancing weight 1 is detachably arranged on the swing arm 2, the densities of materials are different, and the balancing weights 1 with different masses can be selected to realize different balance states.
Further, the balancing weight 1 can move along the length direction of the swing arm 2. The balancing weight 1 can be selectively fixed at different positions on the swing arm 2, so that the overall moment of the balancing weight 1 and the swing arm 2 is changed, and different moment balance states are realized. Or, the moment balance between the swing arm 2 and the turning plate 5 is realized by adjusting the position of the balancing weight 1.
In general, the weight 1 is provided on the swing arm 2, so that the moment of the swing arm 2 with smaller mass can be ignored when the whole moment is calculated, and the moment of the swing arm 2 cannot be ignored when the mass of the swing arm 2 is larger when the fitting block 1 is not provided.
Wherein in the closed state, the flap 5 extends obliquely downward from the hinge axis, and the swing arm 2 extends obliquely downward from the hinge axis. In this embodiment, when the flap 5 is turned down, the swing arm 2 is turned up, the arm of force will be increased, and this will overcome the effect of the swing arm 2 when enough material is to be accumulated on the flap 5, so that the flap 5 is turned down.
Wherein the flap valve comprises two flaps 5 which are symmetrically arranged. As shown with reference to fig. 2 and 3, two flanges 5 are respectively located on the left and right sides, and are respectively connected with the above-described swing arm 2 and the fitting block 1, and are hinged to the hinge shaft. In other embodiments, only one flap 5 may be provided, but of course, other numbers of flaps 5 may be provided, such as a plurality of flaps 5 arranged in the circumferential direction.
In addition, a bead 6 is provided in the housing 7, and in the closed state, the surface of the flap 5 facing the inlet 3 is attached to the bead 6. The bead 6 may limit the turning up of the flap 5 so that the flap 5 remains in a closed state in which the flap 5 may just block the passage in the housing 7. In addition, under the limiting action of the pressing bar 6, the moment of the swing arm 2 can be changed according to the requirement (for example, by adjusting the weight and the position of the balancing weight 1) so as to adjust the weight of the material required when the turning plate 5 is opened, namely, the turning plate 5 can be opened when the material is accumulated to a certain weight.
Furthermore, flanges are provided at the inlet 3 and the outlet 8, respectively. The inlet 3 and the outlet 8 are provided with flanges, respectively, to facilitate the connection of other pipes.
The following is a stress analysis of the prior art flap valve and the flap valve according to the present embodiment.
When the flap valve without the lift cap 4 in the prior art is used, firstly, the position of the heavy hammer 1 on the swing arm 2 is adjusted to enable the flap 5 to be closed and cling to the pressing bar 6, and when a weight or powder is piled up to a certain weight above the flap 5, the flap valve opens the powder and drops to the next link. However, when the upper and lower air pressures of the turning plate 5 are inconsistent, that is, when P1 is more than P2, the weight of the powder at the upper part of the turning plate 5 needs to overcome not only the moment of the heavy hammer 1 but also the pressure generated by the upper and lower pressure differences. Since the device is of symmetrical construction, taking the left half analysis as an example:
Prior ArtReferring to FIG. 1, when m 1 *L 1 ＞m 2 *L 2 +F 1 *L 3 When the flap valve is opened, but when the pressure difference between the upper and lower sides of the flap valve is 50kPa, taking the dimension of the upper and lower interfaces of the flap valve as 500mmx500mm as an example, the dimension of the single-piece valve plate 5 is calculated according to 500mm by 250mm, F1 is equal to 6125N=612.5 kg, and the stacking density is according to 0.7t/m assuming that the upper part is fly ash 3 The upper stacking height is at least 875mm, and the height may reach 1.5m considering the stacking angle. That is, when the pressure difference between the upper and lower sides of the flap 5 is 50kPa, a material column of 875mm is additionally added to overcome the pressure difference. When the lift cap 4 is mounted on the valve plate 5, as shown in FIG. 3, the upper and lower air pressures of the valve plate are kept uniform, and only the moment (neglecting the moment of the swing arm 2) caused by the weight of the counterweight 1 is considered, namely, m 1 *L 1 ＞m 2 *L 2 。
On the other hand, the scheme also provides pneumatic ash conveying equipment, wherein the pneumatic ash conveying equipment is provided with the flap valve 9. The pneumatic ash conveying equipment comprises a fan 10, an ash bin 12, a first pipeline for connecting the ash bin 12 and the fan 10, and a three-way valve 13 arranged on the first pipeline, wherein the flap valve 9 is connected to the three-way valve 13 by the side and is communicated with the buffer bin 11 through a second pipeline. Fan 10 may provide a high pressure air flow into the first duct to blow ash entering the first duct from surge bin 11 to ash bin 12; if the prior art flap valve is adopted, the pressure of the lower side of the flap 5 is possibly larger than the pressure of the upper side, so that ash on the flap 5 cannot drive the flap 5 to turn downwards, the flap valve is blocked, and the upper side and the lower side of the flap 5 are communicated by adopting the flap valve 9 of the scheme, so that the pressure of the two sides is balanced, and the flap 5 cannot turn downwards to be blocked.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, a number of simple variants of the technical solution of the invention are possible, including combinations of individual specific technical features in any suitable way. The various possible combinations of the invention are not described in detail in order to avoid unnecessary repetition. Such simple variations and combinations are likewise to be regarded as being within the scope of the present disclosure.
Claims (10)
1. The flap valve is characterized by comprising a shell (7) with an inlet (3) at the upper end and an outlet (8) at the lower end, a flap (5) and an air lifting cap (4), wherein the flap (5) is arranged in the shell (7) in a reversible manner, the flap (5) is provided with a through hole, and the air lifting cap (4) is arranged at the through hole to be in fluid communication with two sides of the flap (5).
2. A flap valve according to claim 1, characterized in that the lift cap (4) is inserted into the through hole from the side of the flap (5) facing the inlet (3).
3. A flap valve according to claim 1, characterized in that the flap valve comprises a swing arm (2) connected to the flap (5), the connection point of the swing arm (2) and the flap (5) being rotatably hinged to the housing (7) by means of a hinge shaft.
4. A flap valve according to claim 3, characterized in that the swing arm (2) is provided with a counterweight (1).
5. A flap valve according to claim 3, characterized in that the balancing weight (1) is movable in the length direction of the swing arm (2).
6. A flap valve according to claim 5, characterized in that in the closed state the flap (5) extends obliquely downwards from the hinge axis and the swing arm (2) extends obliquely downwards from the hinge axis.
7. A flap valve according to claim 1, characterized in that the flap valve comprises two flaps (5) arranged symmetrically.
8. A flap valve according to claim 1, characterized in that a bead (6) is provided in the housing (7), the surface of the flap (5) facing the inlet (3) being in contact with the bead (6) in the closed state.
9. A flap valve according to claim 1, characterized in that the inlet (3) and the outlet (8) are provided with flanges, respectively.
10. A pneumatic ash conveying apparatus, characterized in that it is provided with a flap valve according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310640034.6A CN116443587A (en) | 2023-05-31 | 2023-05-31 | Flap valve and pneumatic ash conveying equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310640034.6A CN116443587A (en) | 2023-05-31 | 2023-05-31 | Flap valve and pneumatic ash conveying equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116443587A true CN116443587A (en) | 2023-07-18 |
Family
ID=87130390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310640034.6A Pending CN116443587A (en) | 2023-05-31 | 2023-05-31 | Flap valve and pneumatic ash conveying equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116443587A (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5174547A (en) * | 1990-10-02 | 1992-12-29 | Alcatel Cit | Butterfly valve for limiting sudden variations in gas flow along a duct |
| FR2819036A1 (en) * | 2001-01-04 | 2002-07-05 | Cit Alcatel | VALVE AND ELECTROCHEMICAL GENERATOR COMPRISING SUCH A VALVE |
| CN202597725U (en) * | 2012-05-15 | 2012-12-12 | 宝山钢铁股份有限公司 | Material-sealing type flap valve |
| EP2673536A1 (en) * | 2011-02-10 | 2013-12-18 | Fluid Automation Systems S.A. | Electrically actuated valve with a sealing ball |
| CN203806721U (en) * | 2014-03-19 | 2014-09-03 | 北京中冶设备研究设计总院有限公司 | Dry quenching vibration feeder ash discharging device |
| CN104676016A (en) * | 2013-12-03 | 2015-06-03 | 刘汉兴 | Gravity flap valve |
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| CN212711699U (en) * | 2020-07-24 | 2021-03-16 | 四川中科融宸环保科技有限公司 | Automatic turn over board airlock valve |
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| CN213512255U (en) * | 2020-08-31 | 2021-06-22 | 广东纤力玻璃钢有限公司 | Glass fiber reinforced plastic pressure relief device |
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-
2023
- 2023-05-31 CN CN202310640034.6A patent/CN116443587A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5174547A (en) * | 1990-10-02 | 1992-12-29 | Alcatel Cit | Butterfly valve for limiting sudden variations in gas flow along a duct |
| FR2819036A1 (en) * | 2001-01-04 | 2002-07-05 | Cit Alcatel | VALVE AND ELECTROCHEMICAL GENERATOR COMPRISING SUCH A VALVE |
| EP2673536A1 (en) * | 2011-02-10 | 2013-12-18 | Fluid Automation Systems S.A. | Electrically actuated valve with a sealing ball |
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| CN104676016A (en) * | 2013-12-03 | 2015-06-03 | 刘汉兴 | Gravity flap valve |
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| CN105724187A (en) * | 2016-02-18 | 2016-07-06 | 苏州仁和园林股份有限公司 | Solar garden irrigation device |
| CN209354673U (en) * | 2018-12-31 | 2019-09-06 | 河南汇金智能装备有限公司 | Flap valve |
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| CN213451835U (en) * | 2020-08-31 | 2021-06-15 | 广东万和热能科技有限公司 | Premixing valve and wall-mounted furnace |
| CN213512255U (en) * | 2020-08-31 | 2021-06-22 | 广东纤力玻璃钢有限公司 | Glass fiber reinforced plastic pressure relief device |
| CN215720998U (en) * | 2021-09-14 | 2022-02-01 | 中冶长天国际工程有限责任公司 | Electric three-way flue gas switching valve and double-flue sintering system thereof |
| CN216826140U (en) * | 2021-12-16 | 2022-06-28 | 国家能源集团宁夏煤业有限责任公司 | Distributor of Fischer-Tropsch synthesis reactor |
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