CN203783336U - Anti-leakage coal mill hot air insulation gate - Google Patents
Anti-leakage coal mill hot air insulation gate Download PDFInfo
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- CN203783336U CN203783336U CN201420214991.9U CN201420214991U CN203783336U CN 203783336 U CN203783336 U CN 203783336U CN 201420214991 U CN201420214991 U CN 201420214991U CN 203783336 U CN203783336 U CN 203783336U
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- door
- hot air
- guide rod
- doorframe
- plate
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Abstract
The utility model provides an anti-leakage coal mill hot air insulation gate. The insulation gate comprises a gate framework, a gate plate, a drive mechanism, a travel guide rod, a sealing device, a locking device and a detection system, wherein the drive mechanism is connected with the gate plate; the travel guide rod is connected with the drive mechanism; a sealing device is arranged on the gate framework; the locking device is used for locking the gate plate and the gate framework; the detection system is used for detecting the opening/closing state of the gate plate, and comprises a detection block movingback and forth along the travel guide rod, and a limit switch arranged on a movement track of the detection block, and further comprises two springs arranged on the outer side ofthe travel guide rod, which are used for pushing the detection block to move along the travel switch to be in contact with the limit switch when the gate plate is closed. Therefore, the problem about failure of the springs, caused by the dust accumulated on the springs is foundationally solved, and further the risk, namely a locking cylinder acts in advance since the travel switch does not properly contact at a proper position, is avoided.
Description
Technical field
The utility model relates to coal pulverizer equipment, relates in particular to be arranged on coal pulverizer inlet place and to be used for stopping that hot blast enters the hot air isolating door of coal pulverizer.
Background technology
Hot air isolating door is as the main xegregating unit of coal pulverizer and steam generator system, and it is for cutting off hot blast in the time stopping grinding, and in the time catching fire in coal pulverizer, quick closedown, cuts off the hot blast source of a wind, prevents coal dust generation detonation in coal pulverizer.And switch is frequent, the double action that hot air isolating door has isolation door concurrently and closes the door soon owing to switching coal pulverizer for hot air isolating door.For this reason, there is regular hour requirement for the opening and closing of hot air isolating door, and all higher for the requirement of the leakproofness of closing, reliability.
There is isolation door to mainly contain air channel, doorframe (also can be described as " external door "), door-plate (also can be described as " inside door "), comprise the composition such as driving mechanism, locking cylinder of stroke guide rod and spring, and between the surrounding of door-plate and doorframe, be provided with packing_seal bar.When major control mode, when closing the door after instruction issuing, driving mechanism action, door-plate compresses the packing_seal bar of doorframe to realize the isolated of high-temperature hot-air, reduces the temperature in coal pulverizer.But through observing, for many years, all there is problems such as " are not closed completely, isolation door in leak outside " in the isolation door that domestic each power plant is used, so that frequent passive shutdown, causes maintenance difficulty, and maintainer's safety is also failed effectively to ensure.
As shown in Figure 1, the main cause that causes the problems referred to above to exist is that hot air isolating door stroke guide rod 10 interior dust stratifications are serious, cause the spring 20 that is arranged on stroke guide rod 10 inside lost efficacy and caused the travel switch that detects piece 30 and isolation door not reach position, switching signals etc. can not be returned, operations staff cannot judge the accurate location of door-plate, even cause above-mentioned locking cylinder on-line operation to apply external force to doorframe owing to not contacting to put in place in the given time, cause doorframe to deform, lose sealing function, in easily producing, leak.On this basis, due to primary air pressure compared with high, dust burdening is large, in the time that doorframe deforms, wind, ash etc. leak from doorframe, thereby cause hot air isolating door to leak outside.
In addition, find through also observing, above-mentioned hot air isolating door is because adopted packing form is poor, the elasticity of packing and flexible poor in the time of high temperature, frangible, cause the sealing of packing short application life, and, above-mentioned packing is also easily pressed partially and is affected sealing effectiveness in the time that isolation door is closed, thereby easily makes it occur leaking outside.
Utility model content
The purpose of this utility model is to provide a kind of coal pulverizer hot air isolating door tight, that completely cut off, without leakage, conveniently overhaul of closing.
In order to achieve the above object, the utility model adopts following technical scheme:
A kind of coal pulverizer hot air isolating door of Leakage prevention, comprise doorframe, door-plate, the driving mechanism being connected with described door-plate, the stroke guide rod being connected with described driving mechanism, be arranged on the sealing device of described doorframe, for the locking device of lock door panel and doorframe, for detection of the detection system of door-plate on off state, wherein, the detection piece that described detection system comprises limit switch and moves around along described stroke guide rod, it is characterized in that, described detection system also comprises two springs that are arranged on described stroke guide rod outside, move to contact with described limit switch for promote described detection piece in the time that described door-plate cuts out along described stroke guide rod.
Particularly, described driving mechanism comprises switch gate cylinder, and described locking device comprises locking cylinder, the lock shaft matching with locking cylinder and the lock cam being connected with lock shaft.
Further, while closing for fear of isolation door, the position of sealing device is offset, and the utility model also provides following technical scheme:
Described doorframe is located to be also provided with limiting section in the inner part, and described sealing device is fixed on described doorframe to surround the mode of described limiting section;
The internal diameter of described sealing device is suitable with the external diameter of described limiting section, and the thickness of described sealing device is 3-5mm; Described limiting section is band steel or the channel-section steel being installed on described doorframe, and described sealing device is graphite nickel wire packing;
And, the interior leakage of hot blast while closing in order to strengthen isolation door, the utility model also provides following technical scheme: described hot air isolating door is provided with the packing for sealing, and described packing is kalamein wire tray root.
Obviously, adopt after technique scheme, because spring is arranged on stroke guide rod outside, even if dust stratification seriously also can ensure can return in time switching signal when door-plate cuts out, ensure that locking device can lock doorframe and door-plate in time, ensure that isolation door closes tightly; And, due to the coordinating and be arranged on the packing of door-plate of limiting section and sealing device, when being closed, hot air isolating door can avoid occurring the phenomenon of interior leakage.
Brief description of the drawings
Figure 1 shows that the structural representation of prior art stroke guide rod;
Figure 2 shows that the structural representation of the hot air isolating door of the utility model embodiment;
Figure 3 shows that the structural representation of the stroke guide rod of the utility model embodiment;
Figure 4 shows that the sash structure schematic diagram of the utility model embodiment.
Symbol description: 1,10 stroke guide rods, 2,20 springs, 3,30 detect piece, 4 doorframes, 41 band steels, 42 graphite nickel wire packings, 5 door-plates, 6 switching cylinders, 7 locking cylinders, 8 lock shafts, 9 lock cams, A limit switch.
Detailed description of the invention
The technical solution of the utility model is the built-in spring of stroke guide rod to be revised as external spring, and the motion track of stroke guide rod can not affected by dust stratification, can feed back in time the tram of door-plate, ensures that door-plate is tight with coordinating of doorframe.
Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described in detail, it should be noted that, these specific descriptions just allow those of ordinary skill in the art be more prone to, clearly understand the utility model, but not to limited explanation of the present utility model.
Fig. 2 is the structural representation of the utility model embodiment hot air isolating door.As shown in Figure 2, hot air isolating door comprises: doorframe 4, and be provided with sealing device on doorframe 4, in the present embodiment, sealing device is 42 graphite nickel wire packings; Door-plate 5, matches with above-mentioned doorframe 4; Driving mechanism, comprises switch cylinder 6; Locking device, for lock door panel 5 and doorframe 4, also comprise locking cylinder 7, with the suitable lock shaft 8 of locking cylinder 7, wherein, above-mentioned lock shaft 8 run through above-mentioned doorframe 4 and extend on door-plate 5 with the supporting lock door panel 5 of lock cam 9 and doorframe 4 that are arranged on door-plate 5; Detection system, for detection of the on off state of above-mentioned door-plate 5, it comprises stroke guide rod 1 suitable with above-mentioned switch cylinder 6 and that be connected with above-mentioned door-plate 5, the detection piece 3 moving along stroke guide rod 1, near door-plate 5 fastening positions and be arranged on limit switch A on the motion track that detects piece 3 etc., so, in the time that above-mentioned door-plate 5 cuts out, above-mentioned detection piece 3 moves to along stroke guide rod 1 with above-mentioned limit switch A and contacts to represent that door-plate 5 cut out, otherwise, in the time that door-plate 5 is opened, 3 of above-mentioned detection pieces do not contact with above-mentioned limit switch A.
Fig. 3 is the structural representation of the present embodiment stroke guide rod.As shown in Figure 3, in order to ensure to detect the smooth movement of piece on stroke guide rod, can not be subject to the impact of the dust stratification on guide rod, preferred, in this enforcement, be provided with symmetrically two springs 2 in the outside of above-mentioned stroke guide rod 1, one end of these two springs 2 is cemented on stroke guide rod 1, and the other end is cemented in and detects on piece 3, thereby if door-plate 5 in the time of opening, above-mentioned spring 2 is compressed, detects piece 3 and does not contact with limit switch A; Otherwise, detect piece 3 under the promotion of the deformation force of spring 2, move to along stroke guide rod 1 position contacting with above-mentioned limit switch A.
Fig. 4 is the structural representation of the present embodiment doorframe.Can find out from the operation conditions of current actual hot air isolating door, one of them reason that hot air isolating door leaks outside is that the packing of isolation door inner side is pressed partially; For this reason, in the present embodiment, as shown in Figure 4, be also provided with limiting section on doorframe 4, it can match with the sealing device being arranged on doorframe 4, exactly, sealing device on doorframe 4 is fixed on above-mentioned doorframe 4 to surround the mode of above-mentioned limiting section, and, preferably, the internal diameter of above-mentioned sealing device is suitable with the external diameter of limiting section, and the thickness of sealing device is 3-5mm.And in order to improve the versatility of component, preferably, above-mentioned limiting section can be and installs (or welding) band steel 41 or channel-section steel on doorframe 4 additional, above-mentioned sealing device is graphite nickel wire packing 42, so, adopt after this structure, close Shi Buhui when door-plate 5 and cause the packing 42 on doorframe 4 partially to be affected sealing effectiveness by pressure.
On the basis of the above, in order to increase further the effect of closing of isolation door, preferred, on door-plate 5, be also provided with the packing for sealing, as the kalamein wire tray root that the present embodiment adopted; Particularly, above-mentioned kalamein wire tray root is fibrous by the netted burden expanded graphite of Ni-Cr.And, the method that above-mentioned door-plate 5 should adopt band steel that packing is beaten out in the time that packing is installed, can make packing surface comparatively smooth, and the method that should avoid maintainer directly to strike with a hammer, prevent because of the uneven gapped sealing effectiveness that affects in position that it is contacted with the packing that is arranged on doorframe 4 of packing, so, also greatly improve the application life of packing.
Particularly, the course of work of above-mentioned coal pulverizer hot air isolating door is as follows:
Isolation door is opened: open command is assigned, coal mill control cabinet guiding driving switch cylinder 6 moves, apply force on door-plate 5 to drive above-mentioned door-plate 5 to move, separate with doorframe 4 via stroke guide rod 1, now detect piece 3 and also move and do not contact with limit switch A along stroke guide rod 1 towards door-plate 5 moving directions, spring 2 is compressed;
Isolation door is closed: out code is assigned, coal mill control cabinet guiding driving switch cylinder 6 moves, carry active force to door-plate 5 via stroke guide rod 1, move to fastening position from enable possition to promote door-plate 5, detect piece 3 also moves along stroke guide rod 1 towards door-plate 5 moving directions under the promotion of the deformation restoring force of above-mentioned spring 2, until it contacts and exports one stroke signal to switch board with the limit switch A arranging near door-plate 5 fastening positions, represent that door-plate 5 has moved to suitable position, now switch board is controlled locking cylinder 7 and is started, compress door-plate 5 and doorframe 4 via lock shaft 8 and the effect of lock cam 9, thereby realize hot air isolating.
Those of ordinary skill in the art should be understood that above-mentioned locking device also can adopt all the other suitable retaining mechanisms; The above-mentioned packing being arranged on door-plate and doorframe also can be taked dissimilar packing according to real needs.
Obviously, adopt technique scheme, adopt the technical scheme described in above-described embodiment, comparatively sensitive for the closing control of door-plate, fundamentally solve that the spring failure that dust stratification causes, travel switch do not reach position and the risk that causes locking cylinder to move in advance; And, owing to also hermetically-sealed construction etc. being transformed, the technical problems such as hot air isolating door leaks outside, interior leakage are also solved, and method is simple, cost is low, respond well, also less to the transformation degree of equipment, thereby for overhaul of the equipments brings larger convenience, also improve maintainer's safety.
Finally it should be noted that, above-mentioned explanation is only most preferred embodiment of the present utility model, not the utility model is done to any pro forma restriction.Any those of ordinary skill in the art; do not departing within the scope of technical solutions of the utility model; all can utilize way and the technology contents of above-mentioned announcement to make many possible variations and simple replacement etc. to technical solutions of the utility model, these all belong to the scope of technical solutions of the utility model protection.
Claims (6)
1. the coal pulverizer hot air isolating door of a Leakage prevention, comprise doorframe, door-plate, the driving mechanism being connected with described door-plate, the stroke guide rod being connected with described driving mechanism, be arranged on the sealing device of described doorframe, for the locking device of lock door panel and doorframe, for detection of the detection system of door-plate on off state, wherein, described detection system comprises the detection piece moving around along described stroke guide rod and is arranged on the limit switch on described detection piece motion track, it is characterized in that, described detection system also comprises two springs that are arranged on described stroke guide rod outside, move to contact with described limit switch for promote described detection piece in the time that described door-plate cuts out along described stroke guide rod.
2. the coal pulverizer hot air isolating door of Leakage prevention as claimed in claim 1, it is characterized in that, described driving mechanism comprises switch gate cylinder, and described locking device comprises locking cylinder, the lock shaft matching with locking cylinder and the lock cam being connected with lock shaft.
3. the coal pulverizer hot air isolating door of Leakage prevention as claimed in claim 1 or 2, is characterized in that, described doorframe is located to be also provided with limiting section in the inner part, and described sealing device is fixed on described doorframe to surround the mode of described limiting section.
4. the coal pulverizer hot air isolating door of Leakage prevention as claimed in claim 3, is characterized in that, the internal diameter of described sealing device is suitable with the external diameter of described limiting section, and the thickness of described sealing device is 3-5mm.
5. the coal pulverizer hot air isolating door of Leakage prevention as claimed in claim 4, is characterized in that, described limiting section is band steel or the channel-section steel being installed on described doorframe, and described sealing device is graphite nickel wire packing.
6. the coal pulverizer hot air isolating door of the Leakage prevention as described in arbitrary claim in claim 4 or 5, is characterized in that, described hot air isolating door is provided with the packing for sealing, and described packing is kalamein wire tray root.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420214991.9U CN203783336U (en) | 2014-04-29 | 2014-04-29 | Anti-leakage coal mill hot air insulation gate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420214991.9U CN203783336U (en) | 2014-04-29 | 2014-04-29 | Anti-leakage coal mill hot air insulation gate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203783336U true CN203783336U (en) | 2014-08-20 |
Family
ID=51319536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420214991.9U Expired - Fee Related CN203783336U (en) | 2014-04-29 | 2014-04-29 | Anti-leakage coal mill hot air insulation gate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203783336U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105042170A (en) * | 2015-04-23 | 2015-11-11 | 肖华 | Mechanical in-place feedback device for travel switch of plugboard type air door |
| CN106639723A (en) * | 2016-11-25 | 2017-05-10 | 辽宁虹圆现代农业装备技术开发有限公司 | Linking device for mechanically opening window of greenhouse |
-
2014
- 2014-04-29 CN CN201420214991.9U patent/CN203783336U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105042170A (en) * | 2015-04-23 | 2015-11-11 | 肖华 | Mechanical in-place feedback device for travel switch of plugboard type air door |
| CN106639723A (en) * | 2016-11-25 | 2017-05-10 | 辽宁虹圆现代农业装备技术开发有限公司 | Linking device for mechanically opening window of greenhouse |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140820 Termination date: 20190429 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |