CN103791511A - Spraying gun self-sealing tube base device for flue system - Google Patents
Spraying gun self-sealing tube base device for flue system Download PDFInfo
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- CN103791511A CN103791511A CN201410027909.6A CN201410027909A CN103791511A CN 103791511 A CN103791511 A CN 103791511A CN 201410027909 A CN201410027909 A CN 201410027909A CN 103791511 A CN103791511 A CN 103791511A
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- spray gun
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- flue
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Abstract
The invention discloses a spraying gun self-sealing tube base device for a flue system. The spraying gun self-sealing tube base device comprises a spraying gun tube base. A plug support which is clamped and fixed to the inner wall of the spraying gun tube base in a sealing mode is arranged inside the front end of the spraying gun tube base. A through hole for a spraying gun to penetrate is formed in the middle of the plug support. A plug fixing piece and a plug cover plate are arranged on the side, close to a flue, of the plug support; the plug fixing piece is fixed to the plug support; one end of the plug cover plate is fixedly connected with the plug fixing piece through a rotating shaft with a spring, the plug cover plate can rotate around the rotating shaft, and the other end of the plug cover plate covers the through hole in a sealing mode. A gasket support which is clamped and fixed to the inner wall of the spraying gun tube base in a sealing mode is arranged inside the middle section of the spraying gun tube base, multi-stage sealing gaskets are arranged in the middle of the gasket support, and holes for the spraying gun to penetrate are formed in the middles of the sealing gaskets. Tube base internal threads are arranged inside the rear end of the spraying gun tube base. The spraying gun tube base is provided with a three-stage sealing structure, the overall structure is simple, safe and efficient, and the purposes of sealing the tube base and preventing flue gas from flowing outwards are achieved.
Description
Technical field
The present invention relates to a kind of spray gun self sealss header assembly for flue system, belong to flue tight socket technical field.
Background technology
Domestic electricity market is substantially take coal-burning boiler as main, along with national environmental protection policy is strict all the more, also more and more higher for the requirement of emission of NOx of boiler.In order to reduce the discharge of pollutant, SCR(selective catalytic oxidation reduction reaction) and SNCR(selective non-catalytic redox reaction) etc. denitration technology be used to boiler smoke emission-reducing system.
Flue need to use spray gun to spray into reducing agent at boiler correct position toward boiler internal.But flue inside is high-temperature flue gas environment, is generally positive pressure system simultaneously, therefore, spray gun needs sealing in base, to prevent the leakage of flue gas.
At present, existing base does not have automatic sealing function, for meeting sealing, prevents flue gas leakage, and the normal way adopting is: in the time throwing in spray gun, the method connecting by flange couples together spray gun and flue, reaches the effect of sealing, prevents flue gas outflow.While adopting flange to connect, when spray gun needs maintenance, after demounting flange, cannot carry out effective sealing, therefore, only have in the situation of blowing out and can overhaul; Meanwhile, the dismounting of flange also bothers very much, waste of manpower and time, after dismantling, having overhauled, also need to reinstall flange, and need equally manpower and time.
In addition the mode that, existing base is also threaded with base by spray gun is connected.Its complex structure, security is low.This patent has well solved this problem, when spray gun inserts, automatically opens base seal member, moves back base seal return after rifle, automatically keeps sealing.
Summary of the invention
The object of the invention is to: a kind of spray gun self sealss header assembly for flue system is provided, in the time there is no spray gun, automatically keep sealing, prevent flue gas outflow, in the time inserting spray gun without base is operated, seal can enter and open along with spray gun, does not affect the work of spray gun; Solve existing base and prevent flue gas outflow by flange or the mode that is threaded, its sealing effectiveness is not good, the technical problem of installing/dismounting inconvenience and waste of manpower and time, thus can effectively solve above-mentioned problems of the prior art.
The object of the invention realizes by following technical proposals: a kind of spray gun self sealss header assembly for flue system, comprise spray gun base, the front end of spray gun base and the heat-insulation layer of flue are fixed, spray gun enters from the rear end of spray gun base, be provided with the plug bearing fixing with its inner wall sealing in the front end inside of spray gun base, the middle part of described plug bearing is provided with the through hole passing for spray gun, plug bearing is provided with plug fixture and plug cover plate near a side of flue, described plug fixture is fixed on plug bearing, one end of plug cover plate is fixed by the rotating shaft with spring and plug fixture, plug cover plate can rotate around rotating shaft, the other end sealing of plug cover plate is placed on through hole, the middle intersegmental part of described spray gun base is provided with the packing ring bearing fixing with its inner wall sealing, and the middle part of described packing ring bearing is provided with multi-stage sealed packing ring, and the middle part of seal washer is provided with the hole of passing through for spray gun, the inside, rear end of described spray gun base is provided with base internal thread.
As a kind of optimal way, described through hole is that front end is little, large tubaeform in rear end, and its flaring osculum diameter is greater than spray gun external diameter 0.5-1mm.
As further preferred embodiment, described plug cover plate is up big and down small wedge shape, and this plug cover plate is fixed on rotating shaft, and spring one end of rotating shaft is threaded onto on rotating shaft, and the other end is pressed on plug bearing.
As further preferred embodiment, the described plug cover plate near flue place equals the thickness of heat-insulation layer apart from the distance of burner hearth.
As further preferred embodiment, described plug bearing, plug fixture and plug cover plate form one group of seal plug, are provided with two groups of seal plugs in described spray gun base, and spacing distance between two groups is greater than the length of plug cover plate.
As a kind of optimal way, described seal washer is three refractory seals rubber rings.
As a kind of optimal way, spray gun is provided with adjustable thread piece, when spray gun is combined with spray gun base, and the sealing corresponding to adjustable thread piece of described base internal thread.
As further preferred embodiment, described adjustable thread piece is fastening by trip bolt and spray gun.
As a kind of optimal way, described spray gun base is connected with the heat-insulation layer of flue by flange.
The course of work of the present invention and realize principle and be:
When spray gun is inserted by base, the two-layer plug of base leading portion can be backed down automatically, thereby gets out of the way space for spray gun enters, and in the time that spray gun is extracted, plug can drive self-return by self gravitation and spring force, prevents flue gas outflow.
Compared with prior art, beneficial effect of the present invention: spray gun base of the present invention is provided with three grades of sealings, overall structure is simple, safety, efficient, when throwing in insertion, can automatically open by spray gun the placement of seal member assurance spray gun, base seal member self-return when spray gun is extracted, the sealing that realizes base prevents flue gas outflow; Specifically, the present invention possesses following advantage:
1. base is provided with three grades of sealing mechanisms, and wherein the first order is for being threaded, and the second level is for effectively to connect by seal washer, and the third level, for connecting by twin-stage cover plate for sealing plug, plays multi-sealed effect;
2. the plug of the inner leading portion of base is movable part, and spray gun can be backed down while insertion automatically, can not hinder entering of spray gun, easy to use, reaches the efficient effect of application;
3. the plug of the inner leading portion of base can rely on own wt and spring force to drive self-return in the time that spray gun takes out, and automatically prevents flue gas outflow;
4. the first order of sealing is female thread structure, is having twin-stage cover plate for sealing plug connect and seal washer sealing in the situation that, by the spacing screw thread on spray gun and base screw-internal thread fit to reach the spacing of spray gun;
5. the spacing screw thread on spray gun is removable threaded block, the spacing position of the Depth determination screw thread that can need to insert according to spray gun, convenient adjusting.
Accompanying drawing explanation
Fig. 1 is the structural representation of spray gun self sealss base of the present invention;
Fig. 2 is that base is connected with flue, schematic diagram when spray gun is extracted;
Fig. 3 is that base is connected with flue, schematic diagram when spray gun inserts.
Wherein: 1-base internal thread, 2-base outer wall, 3-seal washer, 4-packing ring bearing, 5-plug bearing, 6-plug fixture, 7-plug cover plate, 8-flange, the rotating shaft of 9-with spring, 10-adjustable thread piece, 11-trip bolt, 101-spray gun base, 102-spray gun, 103-flue, 104-heat-insulation layer.
The specific embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Disclosed all features in this description, or step in disclosed all methods or process, except the speciality and/or step of mutual repulsion, all can combine by any way, unless narration especially, all can be replaced by other equivalences or the alternative features with similar object,, unless narration especially, an embodiment in a series of equivalences of each feature or similar characteristics.
embodiment 1
As shown in Figure 1, Figure 2, Figure 3 shows, comprise spray gun base 101, the heat-insulation layer 104 of the front end of spray gun base 101 and flue 103 is fixing, and spray gun 102 enters from the rear end of spray gun base 101.Described spray gun base 101 is connected with the heat-insulation layer 104 of flue 103 by flange 8.In base, be provided with 3 grades of sealing mechanisms, wherein the first order is for being threaded, and the second level is for effectively to connect by seal washer, and the third level is for connecting by twin-stage cover plate for sealing plug, and concrete structure is as follows:
Third level sealing mechanism: be provided with the plug bearing 5 fixing with its inner wall sealing in the front end inside of spray gun base 101, the middle part of described plug bearing 5 is provided with the through hole 2 passing for spray gun 102, plug bearing 5 is provided with plug fixture 6 and plug cover plate 7 near a side of flue, described plug fixture 6 is fixed on plug bearing 5, one end of plug cover plate 7 is fixing with plug fixture 6 by the rotating shaft 9 with spring, plug cover plate 7 can rotate around rotating shaft 9, and the other end sealing of plug cover plate 7 is placed on through hole 2.Plug is movable part, and spray gun can be backed down while insertion automatically, can not hinder entering of spray gun.
Specifically, described through hole 2 is that front end is little, large tubaeform in rear end, and its flaring osculum diameter is greater than spray gun external diameter 0.5-1mm, like this, when spray gun is during through this through hole 2, between spray gun and hole wall, can form interference fit, plays the effect of sealing.Described plug cover plate 7 is up big and down small wedge shape, and this plug cover plate 7 is fixed on rotating shaft 9, and spring one end of rotating shaft 9 is threaded onto on rotating shaft 9, and the other end is pressed on plug bearing 5.Plug cover plate is shaped as Wedge-shaped, up big and down small, and top is fixed with pin, is placed with spring structure simultaneously.Whole plug cover plate can pivot, and realizes and opening or closure.In the time that spray gun inserts, cover plate can be backed down as spray gun is by open position, and cover plate can be realized sealing by self-return under the driving of self gravitation and spring force in the time that spray gun exits.
The described plug cover plate 7 near flue place equals the thickness of heat-insulation layer 104 apart from the distance of burner hearth.
Described plug bearing 5, plug fixture 6 and plug cover plate 7 form one group of seal plug, in described spray gun base 101, be provided with two groups of seal plugs, and the spacing distance between two groups is greater than the length of plug cover plate 7, at the inner leading portion of base, two-layer seal plug is set, fixing better when spray gun is entered, sealing is stronger.
Second level sealing mechanism: the middle intersegmental part of described spray gun base 101 is provided with the packing ring bearing 4 fixing with its inner wall sealing, and the middle part of described packing ring bearing 4 is provided with multi-stage sealed packing ring 3, the middle part of seal washer 3 is provided with the hole of passing through for spray gun 102; The inside, rear end of described spray gun base 101 is provided with base internal thread 1.Specifically, described seal washer 3 is three refractory seals rubber rings, and seal washer and body of spray gun rifle closely cooperate, and can be resistance to 200 ℃ with interior high temperature, improved base sealing effectiveness.
First order sealing mechanism: spray gun 102 is provided with adjustable thread piece 10, described adjustable thread piece 10 is fastening by trip bolt 11 and spray gun 102.The spacing position of the Depth determination screw thread that the adjustable thread piece 10 on spray gun can need to insert according to spray gun, the structure adaptability of removable adjusting screw thread is strong, in realizing spray gun and base sealing, can carry out as required the adjustment of position, spray gun simple to operate 102 and spray gun base 101 in conjunction with time, the sealing corresponding to adjustable thread piece 10 of described base internal thread 1.
Having twin-stage cover plate for sealing plug connect and seal washer sealing in the situation that, by the spacing screw thread on spray gun and base screw-internal thread fit to reach the spacing of spray gun.
The described base of this invention is not limited to be applied on boiler SCR or SNCR spray gun, also can be applicable to other and the present invention need technical solution question marks with place.
Engineering Application Example:
Application background: carry out CFB-SNCR technological development test on the CFBB testing stand of certain 3MW, spray urea by spray gun toward boiler furnace correct position, to verify denitration effect.
Application process: spray gun inserts by base, the plug in base is convenient to entering of spray gun by jack-up automatically, and base can be realized the fixing of spray gun, guarantees that pot inner flue gas of the stove can not flow outward by base simultaneously.
The beneficial effect reaching: this base has been realized the safety of denitrification apparatus and convenient.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (9)
1. the spray gun self sealss header assembly for flue system, comprise spray gun base (101), the heat-insulation layer (104) of the front end of spray gun base (101) and flue (103) is fixing, spray gun (102) enters from the rear end of spray gun base (101), it is characterized in that: be provided with the plug bearing (5) fixing with its inner wall sealing in the front end inside of spray gun base (101), the middle part of described plug bearing (5) is provided with the through hole (2) passing for spray gun (102), plug bearing (5) is provided with plug fixture (6) and plug cover plate (7) near a side of flue, described plug fixture (6) is fixed on plug bearing (5), one end of plug cover plate (7) is fixing by the rotating shaft with spring (9) and plug fixture (6), plug cover plate (7) can rotate around rotating shaft (9), the other end sealing of plug cover plate (7) is placed on through hole (2), the middle intersegmental part of described spray gun base (101) is provided with the packing ring bearing (4) fixing with its inner wall sealing, and the middle part of described packing ring bearing (4) is provided with multi-stage sealed packing ring (3), and the middle part of seal washer (3) is provided with the hole of passing through for spray gun (102), the inside, rear end of described spray gun base (101) is provided with base internal thread (1).
2. the spray gun self sealss header assembly for flue system as claimed in claim 1, is characterized in that: described through hole (2) for front end little, large tubaeform in rear end, its flaring osculum diameter is greater than spray gun external diameter 0.5-1mm.
3. as the spray gun self sealss header assembly for flue system as described in arbitrary in claim 1 or 2, it is characterized in that: described plug cover plate (7) is up big and down small wedge shape, this plug cover plate (7) is fixed on rotating shaft (9), and it is upper that spring one end of rotating shaft (9) is threaded onto rotating shaft (9), and the other end is pressed on plug bearing (5).
4. the spray gun self sealss header assembly for flue system as claimed in claim 3, is characterized in that: the described plug cover plate (7) near flue place equals the thickness of heat-insulation layer (104) apart from the distance of burner hearth.
5. the spray gun self sealss header assembly for flue system as claimed in claim 4, it is characterized in that: described plug bearing (5), plug fixture (6) and plug cover plate (7) form one group of seal plug, in described spray gun base (101), be provided with two groups of seal plugs, and spacing distance between two groups is greater than the length of plug cover plate (7).
6. the spray gun self sealss header assembly for flue system as claimed in claim 1, is characterized in that: described seal washer (3) is three refractory seals rubber rings.
7. the spray gun self sealss header assembly for flue system as claimed in claim 1, it is characterized in that: spray gun (102) is provided with adjustable thread piece (10), spray gun (102) and spray gun base (101) in conjunction with time, described base internal thread (1) sealing corresponding to adjustable thread piece (10).
8. the spray gun self sealss header assembly for flue system as claimed in claim 7, is characterized in that: described adjustable thread piece (10) is fastening by trip bolt (11) and spray gun (102).
9. the spray gun self sealss header assembly for flue system as claimed in claim 1, is characterized in that: described spray gun base (101) is connected with the heat-insulation layer (104) of flue (103) by flange (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410027909.6A CN103791511B (en) | 2014-01-22 | 2014-01-22 | A kind of spray gun self sealss header assembly for flue system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410027909.6A CN103791511B (en) | 2014-01-22 | 2014-01-22 | A kind of spray gun self sealss header assembly for flue system |
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| Publication Number | Publication Date |
|---|---|
| CN103791511A true CN103791511A (en) | 2014-05-14 |
| CN103791511B CN103791511B (en) | 2016-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410027909.6A Active CN103791511B (en) | 2014-01-22 | 2014-01-22 | A kind of spray gun self sealss header assembly for flue system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109708470A (en) * | 2019-02-19 | 2019-05-03 | 江苏新春兴再生资源有限责任公司 | A kind of smelting furnace side-blown spray gun jack automatic hole sealing device |
| CN109900113A (en) * | 2019-02-19 | 2019-06-18 | 江苏新春兴再生资源有限责任公司 | A kind of smelting furnace spray gun work servomechanism installation |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004030827A1 (en) * | 2002-10-02 | 2004-04-15 | Spraying Systems Co. | Lance-type liquid reducing agent spray device |
| US20120121475A1 (en) * | 2010-11-12 | 2012-05-17 | Cummins Cal Pacific, Llc | Fluid Injector |
| CN202803096U (en) * | 2012-05-25 | 2013-03-20 | 中国华能集团清洁能源技术研究院有限公司 | Water-cooling air atomizing spray gun |
| CN203030181U (en) * | 2012-11-15 | 2013-07-03 | 西安天立能源环保工程技术有限公司 | Denitration liquid jetting device and jetting gun |
| CN203170210U (en) * | 2013-04-10 | 2013-09-04 | 南京西普水泥工程集团有限公司 | Special spray gun for SNCR (Selective Non-Catalytic Reduction) denitration process |
| CN203718812U (en) * | 2014-01-22 | 2014-07-16 | 东方电气集团东方锅炉股份有限公司 | Self-sealing tube base device of spray gun for flue system |
-
2014
- 2014-01-22 CN CN201410027909.6A patent/CN103791511B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004030827A1 (en) * | 2002-10-02 | 2004-04-15 | Spraying Systems Co. | Lance-type liquid reducing agent spray device |
| US20120121475A1 (en) * | 2010-11-12 | 2012-05-17 | Cummins Cal Pacific, Llc | Fluid Injector |
| CN202803096U (en) * | 2012-05-25 | 2013-03-20 | 中国华能集团清洁能源技术研究院有限公司 | Water-cooling air atomizing spray gun |
| CN203030181U (en) * | 2012-11-15 | 2013-07-03 | 西安天立能源环保工程技术有限公司 | Denitration liquid jetting device and jetting gun |
| CN203170210U (en) * | 2013-04-10 | 2013-09-04 | 南京西普水泥工程集团有限公司 | Special spray gun for SNCR (Selective Non-Catalytic Reduction) denitration process |
| CN203718812U (en) * | 2014-01-22 | 2014-07-16 | 东方电气集团东方锅炉股份有限公司 | Self-sealing tube base device of spray gun for flue system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109708470A (en) * | 2019-02-19 | 2019-05-03 | 江苏新春兴再生资源有限责任公司 | A kind of smelting furnace side-blown spray gun jack automatic hole sealing device |
| CN109900113A (en) * | 2019-02-19 | 2019-06-18 | 江苏新春兴再生资源有限责任公司 | A kind of smelting furnace spray gun work servomechanism installation |
| CN109900113B (en) * | 2019-02-19 | 2023-11-03 | 江苏新春兴再生资源有限责任公司 | Smelting furnace spray gun work servo device |
| CN109708470B (en) * | 2019-02-19 | 2023-11-03 | 江苏新春兴再生资源有限责任公司 | Automatic hole sealing device for side-blown spray gun jacks of smelting furnace |
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| Publication number | Publication date |
|---|---|
| CN103791511B (en) | 2016-01-20 |
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