CN110566923B - Explosion door of waste heat boiler - Google Patents
Explosion door of waste heat boiler Download PDFInfo
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- CN110566923B CN110566923B CN201910917032.0A CN201910917032A CN110566923B CN 110566923 B CN110566923 B CN 110566923B CN 201910917032 A CN201910917032 A CN 201910917032A CN 110566923 B CN110566923 B CN 110566923B
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- rotating shaft
- door cover
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- cover
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- 238000004880 explosion Methods 0.000 title claims abstract description 165
- 239000002918 waste heat Substances 0.000 title claims abstract description 36
- 238000007789 sealing Methods 0.000 claims abstract description 19
- 238000001816 cooling Methods 0.000 claims description 23
- 239000004576 sand Substances 0.000 claims description 7
- 230000009191 jumping Effects 0.000 claims description 2
- 210000002445 nipple Anatomy 0.000 claims 1
- 230000009471 action Effects 0.000 abstract description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 16
- 239000003546 flue gas Substances 0.000 description 15
- 230000005484 gravity Effects 0.000 description 13
- 238000004200 deflagration Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 238000009434 installation Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000003723 Smelting Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000003915 liquefied petroleum gas Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
- F22B1/1807—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines using the exhaust gases of combustion engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/42—Applications, arrangements, or dispositions of alarm or automatic safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
- F23M11/00—Safety arrangements
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Pressure Vessels And Lids Thereof (AREA)
- Chimneys And Flues (AREA)
Abstract
The invention discloses an explosion door of a waste heat boiler, which comprises: explosion vent adapter tube, explosion vent cover and spacing subassembly. An outlet is formed at one end of the explosion vent adapter tube. The explosion door cover can rotationally seal the sealing outlet. The limiting component comprises a counterweight rotating shaft, a limiting block and balancing weights, the limiting block is arranged on the explosion door connecting pipe, the counterweight rotating shaft is connected with the explosion door cover and rotates synchronously with the explosion door cover, the counterweight rotating shaft is limited on the limiting block after rotating to limit the maximum opening angle of the explosion door cover, and the plurality of balancing weights are detachably connected to the counterweight rotating shaft so that the lifting pressure of the explosion door cover is adjustable. According to the explosion-proof door disclosed by the embodiment of the invention, after explosion occurs in the explosion-proof door and enough pressure is accumulated, the explosion-proof door cover and the counterweight rotating shaft rotate together and are opened under the action of impact force, and when the explosion-proof door rotates to the position where the counterweight rotating shaft is matched with the limiting block, the explosion-proof door cover is opened for pressure relief at the maximum angle. And the pressure can be quickly reset after the pressure is relieved. The jump pressure is adjustable, and the use reliability is high.
Description
Technical Field
The invention belongs to the technical field of boilers, and particularly relates to an explosion door of a waste heat boiler.
Background
The waste heat boiler is one of core equipment in nonferrous metal smelting process, can cool and recycle high-temperature flue gas discharged by metallurgical industry furnace, and utilizes heat carried by the high-temperature flue gas to produce steam required by process production. The smelting process usually involves the reduction reaction of metal oxide, regard heavy oil, natural gas, liquefied petroleum gas or coal, etc. as reducing agent, the chemical reaction involved is complicated and changeable, often there is the incomplete condition of reaction, make the high-temperature flue gas that gets into the waste heat boiler contain combustible components such as a certain amount of hydrocarbon, carbon monoxide and tiny carbon particle, when these combustible mixtures flow through the unsmooth and comparatively airtight flue of ventilation, very easy emergence deflagration phenomenon once meetting the fire source, especially when these combustible mixtures gathers in the somewhere of flue, the more easy emergence deflagration of meeting the fire source, leads to the waste heat boiler or the regional pressure surge in the flue, causes the accident.
It is necessary to install an explosion vent on the exhaust-heat boiler and the flue where the combustible mixture is easily collected. When deflagration occurs, the explosion door automatically opens the pressure relief, so that impact damage of deflagration to the waste heat boiler and the flue is reduced, and safe operation of the waste heat boiler is ensured.
The existing fuel oil industrial boiler, gas industrial boiler or coal powder industrial boiler is provided with explosion-proof doors, but the components of high-temperature smoke flowing through the waste heat boiler are complex, so that the explosion-proof doors have poor adaptability to the waste heat boiler. Such as gravity type explosion-proof door, the phenomena that the explosion-proof door is frequently jumped, the explosion-proof door is rotated greatly and can not be reset and the service life of the explosion-proof door is reduced often occur. Some explosion vents can be reset, but the pressure relief is not tight after reset, so that the phenomenon of air leakage is easy to occur, and harmful gas and dust in high-temperature flue gas enter the atmosphere to pollute the environment. The high-temperature flue gas at the leakage position can continuously wash the sealing ring, so that the burning of the sealing ring and the leakage of the flue gas are aggravated, the vicious circle is caused, and the operation efficiency of the boiler is reduced.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides the explosion-proof door of the waste heat boiler, which can adjust the tripping pressure by adjusting the number and the positions of the balancing weights, is easy to reset after tripping and solves the technical problems that the explosion-proof door is frequently tripped and is not easy to reset after tripping.
According to an embodiment of the invention, an explosion door of a waste heat boiler comprises: an explosion vent connection pipe, wherein one end of the explosion vent connection pipe forms an outlet; an explosion vent cover rotatably sealing the outlet; the limiting assembly comprises a counterweight rotating shaft, a limiting block and balancing weights, wherein the limiting block is arranged on the explosion-proof door connecting pipe, the counterweight rotating shaft is connected with the explosion-proof door cover and synchronously rotates with the explosion-proof door cover, the counterweight rotating shaft is limited on the limiting block after rotating so as to limit the maximum opening angle of the explosion-proof door cover, and the plurality of balancing weights are detachably connected to the counterweight rotating shaft so that the jumping pressure of the explosion-proof door cover is adjustable.
According to the explosion-proof door of the waste heat boiler, the limiting block is arranged on the explosion-proof door connecting pipe, when explosion occurs in the explosion-proof door connecting pipe and enough pressure is accumulated, the explosion-proof door cover and the counterweight rotating shaft rotate together under the action of the pressure and are opened, when the explosion-proof door cover rotates to the position where the counterweight rotating shaft is matched with the limiting block, the opening angle of the explosion-proof door cover is maximum, and after pressure relief is completed, the explosion-proof door cover is convenient and quick to reset. Because the counter weight rotating shaft is detachably connected with a plurality of counter weights, and the counter weight rotating shaft is connected with the explosion-proof door cover, the gravity of the counter weight rotating shaft and the explosion-proof door cover must be overcome simultaneously when the explosion-proof door cover is opened, so the jump pressure of the explosion-proof door cover can be adjusted by adjusting the number and the positions of the counter weights on the counter weight rotating shaft, frequent jump of the explosion-proof door cover when deflagration occurs is avoided, and the service life of the explosion-proof door cover is prolonged.
According to the explosion-proof door of the waste heat boiler, the explosion-proof door cover is rotatably connected to the explosion-proof door connecting pipe through the rotating shaft, the rotating shaft is connected with the counterweight rotating shaft, and the counterweight rotating shaft and the explosion-proof door cover are located at 30-80 degrees.
According to a further embodiment of the invention, the stop block is provided with a stop block, the rotating shaft is provided with a stop piece matched with the stop block, and when the stop piece is stopped on the stop block, the opening angle of the explosion door cover reaches the maximum.
Optionally, an avoidance hole is formed on the limiting block, and the avoidance hole penetrates through the rotating shaft.
According to a further embodiment of the invention, a plurality of mounting holes are axially formed in the counterweight rotating shaft at intervals, and the counterweight is detachably mounted in the mounting holes.
According to the explosion-proof door of the waste heat boiler, the limiting block is in a fan shape, a plurality of limiting holes are formed in the limiting block at intervals along the circumferential direction, and the counterweight rotating shaft is detachably connected with limiting pins matched with the limiting holes.
According to the explosion door of the waste heat boiler, the outlet is horizontally arranged, the horizontal projection area of the explosion door cover is larger than the outlet area of the explosion door connecting pipe, and the horizontal projection of the counterweight rotating shaft is positioned outside the horizontal projection of the explosion door cover.
According to the explosion-proof door of the waste heat boiler, the outlet is provided with the annular sealing groove, sealing sand is arranged in the annular sealing groove, and the explosion-proof door cover is provided with the joint edge matched with the annular sealing groove.
According to the explosion door of the waste heat boiler, the waste heat boiler further comprises a cooling piece, wherein the cooling piece is arranged at the inlet of the explosion door connecting pipe in a disc mode, and the cooling piece cools high-temperature air flowing through the explosion door connecting pipe.
According to the explosion-proof door of the waste heat boiler, a transparent observation port is arranged on the side wall of the explosion-proof door connecting pipe.
Additional aspects and advantages of the invention will become apparent in the following description or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
Fig. 1 is a schematic perspective view of an explosion vent according to an embodiment of the invention.
Fig. 2 is a schematic perspective view of another angle of the explosion vent according to an embodiment of the invention when the explosion vent is not opened.
Fig. 3 is a schematic perspective view of another angle of the explosion vent according to an embodiment of the invention.
Fig. 4 is a longitudinal cross-sectional view of an explosion vent in accordance with one embodiment of the invention.
Fig. 5 is a schematic view of a partial structure of a rotating shaft, a limiting block, a blocking piece and a stop block according to an embodiment of the present invention.
Fig. 6 is a cross-sectional view of plane F-F of fig. 5.
Fig. 7 is a top view (partially in cross-section) of an explosion vent in accordance with one embodiment of the invention.
Reference numerals:
Explosion vent 100,
Explosion vent adapter 1, outlet 11, inlet 12,
Explosion vent cover 2, joint edge 21,
A rotating shaft 3, a baffle plate 31, a rotating shaft sleeve 32, a connecting body 33, a supporting sleeve 34,
Cooling member 4, cooling tube 41,
A limit component 5,
Counterweight rotating shaft 51, mounting hole 512,
A limiting block 52, a limiting hole 521, an avoiding hole 522, a stop block 523, a supporting seat 524,
A counter weight 53,
A transparent observation port 6,
And an annular seal groove 7.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
In the description of the present invention, it should be understood that the terms "longitudinal," "length," "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "circumferential," etc. indicate or refer to an orientation or positional relationship based on that shown in the drawings, merely for convenience of describing the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
The explosion vent 100 of the waste heat boiler according to the embodiment of the present invention is described below with reference to the drawings of the specification.
An explosion vent 100 of a waste heat boiler according to an embodiment of the present invention, as shown in fig. 1, includes: explosion vent adapter 1, explosion vent cover 2 and spacing subassembly 5.
Wherein, one end of the explosion door connecting tube 1 forms an outlet 11, and the explosion door cover 2 rotatably seals the outlet 11.
As shown in fig. 1, the limiting component 5 includes a counterweight rotating shaft 51, a limiting block 52 and a counterweight 53, the limiting block 52 is disposed on the explosion door connection tube 1, the counterweight rotating shaft 51 is connected with the explosion door cover 2 and rotates synchronously with the explosion door cover 2, the counterweight rotating shaft 51 rotates and then is limited on the limiting block 52 to limit the maximum opening angle of the explosion door cover 2, and the counterweight rotating shaft 51 is detachably connected with a plurality of counterweights 53 to enable the tripping pressure of the explosion door cover 2 to be adjustable.
As can be seen from the above structure, in the explosion-proof door 100 of the exhaust-heat boiler according to the embodiment of the present invention, the limiting block 52 is disposed on the explosion-proof door connection pipe 1, when explosion occurs in the explosion-proof door and a sufficient pressure is accumulated, the explosion-proof door cover 2 and the counterweight rotating shaft 51 rotate together and are opened under the action of the pressure, and when the explosion-proof door cover 2 rotates to a position where the counterweight rotating shaft 51 is matched with the limiting block 52, the explosion-proof door cover 2 is opened at a maximum angle to release pressure. Because explosion vent 2 has the biggest angle of opening, when this angle reasonable in design, after the pressure release is accomplished, explosion vent 2 is under self gravity and counter weight pivot 51 common gravity effect, convenient quick reset.
According to the invention, the plurality of balancing weights 53 are detachably connected to the counterweight rotating shaft 51, and the counterweight rotating shaft 51 is connected with the explosion-proof door cover 2, so that the gravity of the counterweight rotating shaft 51 and the explosion-proof door cover 2 must be overcome simultaneously when the explosion-proof door cover 2 is opened, the tripping pressure of the explosion-proof door cover 2 can be adjusted by adjusting the number of the balancing weights 53 on the counterweight rotating shaft 51, frequent tripping of the explosion-proof door cover 2 when deflagration occurs is avoided, and correspondingly, the explosion-proof door cover 2 can be controlled to be opened again only under the action of a certain pressure, so that the service life of the explosion-proof door cover 2 is ensured. The explosion door cover 2 is prevented from being frequently opened to lead the connection between the explosion door cover 2 and the explosion door connecting pipe 1 to be invalid, and the explosion door cover 2 cannot be normally opened and closed.
It can be understood that compared with an explosion-proof door which is reset only by the self gravity of the door cover and is tripped only by overcoming the self gravity of the door cover, the tripping pressure of the explosion-proof door is adjustable, and the explosion-proof door is easy to reset after the tripping and is not easy to be blocked.
In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In some embodiments of the present invention, as shown in fig. 1 and 4, the explosion vent cover 2 is rotatably connected to the explosion vent adapter 1 through a rotation shaft 3, the rotation shaft 3 is connected to a weight rotation shaft 51, and the weight rotation shaft 51 forms 30 degrees to 80 degrees with the explosion vent cover 2. Through setting up axis of rotation 3, make explosion vent lid 2 and counter weight pivot 51 form synchronous rotation on the one hand, on the other hand can make explosion vent lid 2 rotatable for explosion vent takeover 1 to realize closing reset and opening the pressure release in the rotation in-process. When the angle between the counterweight rotating shaft 51 and the surface of the explosion door cover 2 is within the range of 30-80 degrees, the counterweight rotating shaft 51 and the counterweight 53 thereon apply certain gravity to the explosion door cover 2, so that the explosion door cover 2 needs to overcome larger tripping pressure when being opened; when the pressure is released, the counterweight rotating shaft 51 and the counterweight 53 thereon do not affect the resetting of the explosion door cover 2 to the outlet 11 of the explosion door connecting tube 1 under the action of the gravity. That is, when the angle between the weight rotating shaft 51 and the explosion vent cover 2 is smaller than 30 degrees, each additional weight 53 on the weight rotating shaft 51 will have a larger influence on the take-off pressure of the explosion vent cover 2, which is not beneficial to adjusting the take-off pressure of the explosion vent cover 3. When the angle between the counterweight rotating shaft 51 and the explosion door cover 2 is larger than 80 degrees, after the counterweight rotating shaft 51 and the explosion door cover 3 rotate to the maximum opening angle, the component force of the gravity of the counterweight rotating shaft 51 and the counterweight 53 counteracts part of the component force of the gravity of the explosion door cover 3, so that the explosion door cover 3 is not easy to reset. In addition, when the angle between the counterweight rotating shaft 51 and the explosion vent cover 2 is greater than 80 degrees, in order to enable the explosion vent cover 2 to reset, the actual opening angle of the explosion vent cover 2 is too small and the pressure release efficiency is low when the explosion vent cover 2 rotates to the maximum angle.
Alternatively, as shown in fig. 4, the rotating shaft 3 is fixedly sleeved with a rotating shaft sleeve 32, a plurality of connectors 33 are arranged on the rotating shaft sleeve 32, the other ends of the connectors 33 are connected to the explosion door cover 2, and when the rotating shaft 3 rotates, the rotating shaft sleeve 32 synchronously rotates, and the explosion door cover 2 also rotates.
In some specific examples, as shown in fig. 7, the connector 33 is formed as a hinge.
Alternatively, as shown in fig. 4 and 7, the outer sleeve of the rotary shaft 3 is provided with a support sleeve 34, the support sleeve 34 is in clearance fit with the rotary shaft 3, and the support sleeve 34 is connected to the explosion vent adapter 1.
Advantageously, as shown in fig. 2 and 3, the counterweight rotating shaft 51 is provided with a plurality of mounting holes 512 at intervals along the axial direction, and the counterweight 53 is detachably mounted in the mounting holes 512. By adding the corresponding balancing weights 53 in the mounting holes 512 and adding the balancing weights 53 by selecting the mounting holes 512 at different positions, the jump pressure of the explosion door cover 2 can be adjusted more flexibly. It will be appreciated that the weight 53 is mounted in the mounting hole 512 near one end of the stopper 52 and the weight 53 is mounted in the mounting hole 512 far from one end of the stopper 52, and the increased take-off pressure to the explosion vent 2 is different due to the difference in the rotational center of gravity. In some specific examples, to enable greater take-off pressure of the vent cap 3 or to enable easier repositioning of the vent cap 3, the weight 53 is mounted in a mounting hole 512 on the weight shaft 51 remote from the stopper 52.
The detachable connection manner may be that the balancing weight 53 is installed in the installation hole 512 through a positioning pin, or that the balancing weight 53 is installed in the installation hole 512 through a bolt-nut connector, which is not particularly limited herein.
Alternatively, as shown in fig. 3 and 6, the limiting block 52 is formed in a fan shape, a plurality of limiting holes 521 are circumferentially spaced on the limiting block 52, and a limiting pin matched with the limiting holes 521 is detachably connected to the counterweight rotating shaft 51. Here, on the one hand, when the explosion vent 100 is assembled with the rotation shaft 3, the explosion vent cover 2 and the counterweight rotation shaft 51 in the installation process, the explosion vent cover 2 is covered on the outlet 11, meanwhile, the counterweight rotation shaft 51 is connected with the rotation shaft 3, the angle between the counterweight rotation shaft 51 and the explosion vent cover 2 is rotated and adjusted, the explosion vent cover 2 is positioned on the limiting block 52 through limiting, so as to ensure the installation angle between the explosion vent cover 2 and the counterweight rotation shaft 51, finally, the explosion vent cover 2 and the rotation shaft 3 are connected through the rotation shaft sleeve 32 and the connecting body 33, a stable installation angle is formed, and then the limiting pin can be removed.
On the other hand, when the waste heat boiler needs to be overhauled internally, the explosion door cover 2 is opened, the counterweight rotating shaft 51 is fixed in one of the limiting holes 521 on the limiting block 52 through the limiting pin or the bolt, so that the explosion door cover 2 can form a certain opening angle relative to the outlet 11, and an overhauler can conveniently enter the corresponding position through the explosion door 100 to carry out overhauling work.
Alternatively, as shown in fig. 2,3 and 6, the stopper 52 is formed with a relief hole 522, and the relief hole 522 passes through the rotation shaft 3. That is, when the explosion door cover 2 rotates, the rotation shaft 3 passes through the avoidance hole 522, and the avoidance hole 522 can limit the rotation shaft 3 to a certain extent, so as to prevent the rotation shaft 3 from shaking; the rotating shaft 3 is prevented from being disturbed by the limiting block 52 in the rotating process and not rotating normally to the maximum angle.
In some embodiments of the present invention, as shown in fig. 2 and 3, the stopper 52 is provided with a stopper 523, as shown in fig. 1, the rotating shaft 3 is provided with a stopper 31 matching with the stopper 523, and when the stopper 31 is stopped against the stopper 523, the opening angle of the explosion vent 2 is maximized. The limit fit of the baffle 31 and the stop block 523 ensures that the explosion door cover 2 is kept motionless and begins to release pressure after being opened to the maximum angle, and the explosion door cover can begin to reset after the pressure release is finished. Through setting up the spacing cooperation structure of separation blade 31 and dog 523, limited rotatable extreme position of axis of rotation 3 effectively to further limited explosion vent lid 2 and opened the biggest angle, guaranteed explosion vent lid 2 and can realize smoothly resetting after opening to biggest angle, guaranteed exhaust-heat boiler system and resume normal operating fast.
Optionally, the limiting block 52 is vertically arranged, the surface of the limiting block 52 is perpendicular to the surface of the explosion-proof door cover 2, two opposite side surfaces of the limiting block 52 correspond to the counterweight rotating shaft 51 and the explosion-proof door cover 2 respectively, one side, close to the explosion-proof door cover 2, of the limiting block 52 is connected with the supporting seat 524, and the supporting seat 524 is connected to the explosion-proof door connecting tube 1. By providing the supporting seat 524, the limiting block 52 can be ensured to have certain supporting strength, and the limiting block 52 can be ensured to be stably connected to the explosion door connecting tube 1.
In some embodiments of the present invention, as shown in fig. 1, the outlet 11 is disposed horizontally, and the horizontally projected area of the explosion vent cover 2 is larger than the area of the outlet 11 of the explosion vent adapter 1. It can be understood that when the horizontal projection of the explosion door cover 2 is larger than the area of the outlet 11, the explosion door cover 2 can be ensured to completely seal the outlet 11 when being closed, and a relatively airtight space is formed in the explosion door 100 and the waste heat boiler system, so that the waste heat boiler can form a stable working environment when deflagration does not occur, and high-temperature flue gas is prevented from overflowing outwards.
Advantageously, as shown in fig. 7, the horizontal projection of the counterweight rotation shaft 51 is located outside the horizontal projection of the explosion vent cover 2. With the above structure, the counterweight rotating shaft 51 can be extended to a proper distance, the counterweight 53 can be conveniently assembled, and the counterweight rotating shaft 51 can be conveniently connected with the rotating shaft 3. It will be appreciated that when the counterweight rotating shaft 51 is welded to the rotating shaft 3, the counterweight rotating shaft 51 is spaced a horizontal distance from the explosion door cover 2, so that the welding point on the rotating shaft 3 is further, thereby facilitating rapid welding and preventing other parts from being affected during the welding process.
Advantageously, as shown in fig. 4, the weight rotating shaft 51 is disposed perpendicular to the rotating shaft 3, so that the assembly is easy and the center of gravity is stable.
In some embodiments of the present invention, as shown in fig. 1 and 7, the outlet 11 is provided with an annular seal groove 7, seal sand is provided in the annular seal groove 7, and as shown in fig. 3, the vent cap 2 is provided with a joint edge 21 that mates with the annular seal groove 7. By adopting the sand seal mode, the explosion door cover 2 can be good in tightness when being closed to the outlet 11, the pressure stability in the explosion door 100 is ensured, and the exhaust-heat boiler system is ensured to have no high-temperature flue gas leaking outwards in the normal operation process. In addition, when the explosion-proof door cover 2 is closed on the outlet 11, sealing sand can also form a certain buffer effect on the explosion-proof door cover 2, so that the impact force on the explosion-proof door connecting tube 1 is relieved when the explosion-proof door cover 2 is closed, and the joint edge 21 of the explosion-proof door cover is prevented from being damaged. Effectively avoid the emergence of conditions such as air leakage and flue gas leakage.
In some embodiments of the present invention, as shown in fig. 4, the cooling member 4 is further included, and the cooling member 4 is provided at the inlet 12 of the explosion vent adapter 1, and the cooling member 4 cools the high temperature air flowing through the explosion vent adapter 1. Through setting up cooling piece 4, can prevent that flue gas temperature from being too high and damaging explosion vent lid 2 for the high temperature flue gas cooling of flow through explosion vent takeover 1 effectively to extension explosion vent lid 2's life. Simultaneously, the temperature of the flue gas entering the explosion vent connecting pipe 1 is greatly reduced, the large-area slagging of the explosion vent connecting pipe 1 is prevented, and the blocking of the explosion vent connecting pipe 1 due to slagging is avoided. In addition, after the temperature in the explosion door connecting pipe 1 is reduced, lining heat preservation and refractory concrete are not required to be arranged, and the explosion door connecting pipe is simple in structure and low in cost.
Optionally, the cooling element 4 comprises a cooling tube 41, the cooling tube 41 is coiled at the inlet 12 of the explosion door connecting tube 1, and cooling water circularly flows into the cooling tube 41 to cool the high-temperature flue gas flowing through.
In other examples, the cooling element 4 is formed as an air-cooled heat exchanger, and the circulating gas having a lower temperature flows through the cooling pipe 41.
Advantageously, the explosion vent adapter 1 is formed in a cylindrical shape, and the overall height of the explosion vent adapter 1 is set higher, so that the temperature of the flue gas cooled by the cooling element 4 is lower when the flue gas passes through the outlet 11, and the use safety and durability of the explosion vent cover 2 are ensured.
In some embodiments of the present invention, as shown in fig. 1, the side wall of the explosion vent adapter 1 is provided with a transparent viewing port 6. Through setting up transparent observation mouth 6, make things convenient for the workman to observe and overhaul.
The specific structure of the explosion vent 100 of the exhaust heat boiler in the specific embodiment of the present invention will be described with reference to the drawings.
Examples
An explosion vent 100 of a waste heat boiler, comprising: explosion vent connecting pipe 1, explosion vent cover 2, rotation shaft 3, cooling piece 4, spacing subassembly 5, transparent observation mouth 6 and annular seal groove 7.
As shown in fig. 4 and 7, the explosion vent adapter tube 1 is in a vertical tube shape, the top end of the explosion vent adapter tube 1 is formed into an outlet 11, the bottom end of the explosion vent adapter tube is formed into an inlet 12, an annular sealing groove 7 is arranged around the outlet 11, sealing sand is arranged in the annular sealing groove 7, as shown in fig. 3, a joint edge 21 matched with the annular sealing groove 7 is arranged on the explosion vent cover 2, and when the explosion vent cover 2 is closed on the outlet 11, the joint edge 21 is buried in the sealing sand. The cooling element 4 is formed as a water-cooled tube, the water-cooled tube disc is arranged at the inlet 12 of the explosion-proof door connecting tube 1, and the cooling element 4 cools the high-temperature air flowing through the explosion-proof door connecting tube 1. As shown in fig. 1, the side wall of the explosion vent adapter tube 1 is provided with a transparent observation port 6.
As shown in fig. 1 and 4, the outlet 11 is provided with a supporting sleeve 34, the inside of the supporting sleeve 34 is rotatably connected with a rotating shaft 3, as shown in fig. 4, the outside of the rotating shaft 3 is sleeved with a rotating shaft sleeve 32, the rotating shaft sleeve 32 is provided with a plurality of connecting bodies 33, the other ends of the connecting bodies 33 are connected to the explosion-proof door cover 2, and when the rotating shaft 3 rotates, the rotating shaft sleeve 32 synchronously rotates, and the explosion-proof door cover 2 also rotates. The rotating shaft 3 is provided with a limiting component 5.
As shown in fig. 1, the limiting component 5 includes a counterweight rotating shaft 51, a limiting block 52 and a counterweight 53, as shown in fig. 3 and 6, the limiting block 52 is formed into a fan shape, a plurality of limiting holes 521 are circumferentially spaced on the limiting block 52, and a limiting pin matched with the limiting holes 521 is detachably connected to the counterweight rotating shaft 51. As shown in fig. 2,3 and 6, the stopper 52 is formed with a relief hole 522, and the relief hole 522 passes through the rotation shaft 3. The limiting block 52 is vertically arranged, the surface of the limiting block 52 is perpendicular to the surface of the explosion-proof door cover 2, two opposite side surfaces of the limiting block 52 correspond to the counterweight rotating shaft 51 and the explosion-proof door cover 2 respectively, one side, close to the explosion-proof door cover 2, of the limiting block 52 is connected with the supporting seat 524, and the supporting seat 524 is connected to the explosion-proof door connecting pipe 1. One end of the rotating shaft 3 is connected with a counterweight rotating shaft 51, and the counterweight rotating shaft 51 and the explosion door cover 2 are located at 30 degrees. As shown in fig. 7, the horizontal projection of the weight shaft 51 is located outside the horizontal projection of the explosion vent 2. As shown in fig. 2 and 3, a plurality of mounting holes 512 are axially provided on the weight shaft 51 at intervals, and the weight 53 is detachably mounted in the mounting holes 512.
According to the invention, the position and the number of the balancing weights 53 arranged on the balancing weight rotating shaft 51 are adjusted, so that the tripping pressure of the explosion-proof door cover 2 can be flexibly adjusted, the explosion-proof door cover 2 is ensured to be opened and closed infrequently, the pressure relief of the explosion-proof door cover 2 is ensured to be smoothly opened when the internal pressure is high, and the explosion-proof door cover 2 can be quickly restored to the original position after being opened. The explosion vent 100 of the present invention is highly reliable and does not easily present safety concerns.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Three weights 53 are shown in fig. 3 for illustrative purposes, but it is obvious to one of ordinary skill in the art after reading the above disclosure that the disclosure is applicable to other numbers of weights 53 and falls within the scope of the present invention.
Other configurations of the explosion vent 100 of the waste heat boiler according to the embodiment of the present invention, such as control of the trip pressure of the explosion vent 100 and the correspondence of the gravitational forces of the explosion vent cover 2 and the spacing assembly 5, are known to those skilled in the art, and will not be described in detail herein.
In the description herein, reference to the term "embodiment," "example," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.
Claims (8)
1. An explosion vent of a waste heat boiler, comprising:
an explosion vent connecting pipe, wherein one end of the explosion vent connecting pipe forms an outlet, and the outlet is horizontally arranged;
an explosion vent cover rotatably sealing the outlet;
The limiting assembly comprises a counterweight rotating shaft, a limiting block and a balancing weight, the limiting block is arranged on the explosion door connecting pipe, the counterweight rotating shaft is connected with the explosion door cover and rotates synchronously with the explosion door cover, the counterweight rotating shaft is limited on the limiting block after rotating so as to limit the maximum opening angle of the explosion door cover, the balancing weight rotating shaft is detachably connected with a plurality of balancing weights so that the jumping pressure of the explosion door cover is adjustable, the horizontal projection area of the explosion door cover is larger than the outlet area of the explosion door connecting pipe, and the horizontal projection of the counterweight rotating shaft is positioned outside the horizontal projection of the explosion door cover;
The explosion-proof door cover is rotatably connected to the explosion-proof door connecting pipe through a rotating shaft, the rotating shaft is connected with the counterweight rotating shaft, and the counterweight rotating shaft and the explosion-proof door cover are located at 30-80 degrees.
2. The explosion door of the waste heat boiler according to claim 1, wherein the limiting block is provided with a stop block, the rotating shaft is provided with a stop piece matched with the stop block, and when the stop piece is stopped on the limiting block, the opening angle of the explosion door cover reaches the maximum.
3. The explosion vent of a waste heat boiler according to claim 1, wherein the limiting block is provided with an avoidance hole, and the avoidance hole penetrates through the rotating shaft.
4. The explosion door of the waste heat boiler according to claim 1, wherein a plurality of mounting holes are axially formed in the counterweight rotating shaft at intervals, and the counterweight is detachably mounted in the mounting holes.
5. The explosion door of the waste heat boiler according to claim 1, wherein the limiting block is formed in a fan shape, a plurality of limiting holes are formed in the limiting block at intervals along the circumferential direction, and limiting pins matched with the limiting holes are detachably connected to the counterweight rotating shaft.
6. The explosion vent of the waste heat boiler according to claim 1, wherein the outlet is provided with an annular sealing groove, sealing sand is arranged in the annular sealing groove, and a joint edge matched with the annular sealing groove is arranged on the explosion vent cover.
7. The explosion vent of a waste heat boiler of claim 1, further comprising a cooling member disc disposed at an inlet of the explosion vent adapter, the cooling member cooling high temperature air flowing through the explosion vent adapter.
8. The explosion vent of a waste heat boiler of claim 1, wherein a transparent viewing port is provided in a sidewall of the explosion vent nipple.
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| CN201910917032.0A CN110566923B (en) | 2019-09-26 | 2019-09-26 | Explosion door of waste heat boiler |
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| CN201910917032.0A CN110566923B (en) | 2019-09-26 | 2019-09-26 | Explosion door of waste heat boiler |
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| US11910546B2 (en) * | 2019-06-03 | 2024-02-20 | Toshiba Mitsubishi-Electric Industrial Systems Corporation | Explosion-proof structure for electronic component |
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| CN110566923A (en) | 2019-12-13 |
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