CN103791511B - A kind of spray gun self sealss header assembly for flue system - Google Patents
A kind of spray gun self sealss header assembly for flue system Download PDFInfo
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- CN103791511B CN103791511B CN201410027909.6A CN201410027909A CN103791511B CN 103791511 B CN103791511 B CN 103791511B CN 201410027909 A CN201410027909 A CN 201410027909A CN 103791511 B CN103791511 B CN 103791511B
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- flue
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Abstract
The invention discloses a kind of spray gun self sealss header assembly for flue system, comprise spray gun base, the plug bearing fixed with its inner wall sealing is provided with in inside, the front end of spray gun base, the middle part of described plug bearing is provided with the through hole passed for spray gun, plug bearing is provided with plug fixture and plug cover plate near the side of flue, described plug fixture is fixed on plug bearing, one end of plug cover plate is fixed by the rotating shaft and plug fixture being with spring, plug cover plate can rotate around rotating shaft, and 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 fixed 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 passed through for spray gun; The inside, rear end of described spray gun base is provided with base internal thread.Spray gun base of the present invention is provided with three grades of sealings, and overall structure is simple, safely, efficiently, the sealing realizing base prevents flue gas from outflowing.
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 electrical market is substantially based on coal-burning boiler, and along with national environmental protection policy is strict all the more, the requirement for emission of NOx of boiler is also more and more higher.In order to the discharge of decreasing pollution thing, 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 needs 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, is satisfied sealing, prevents flue gas from revealing, and the normal way adopted is: when throwing in spray gun, spray gun and flue being coupled together, reaching the effect of sealing, prevent flue gas from outflowing by the method for Flange joint.When adopting Flange joint, when spray gun needs maintenance, cannot effective sealing be carried out after demounting flange, therefore, only have when blowing out and can overhaul; Meanwhile, the dismounting of flange also bothers very much, waste of manpower and time, dismounting, overhauled after, also need to reinstall flange, need manpower and time equally.
In addition, the mode that existing base is also threaded by spray gun and base is connected.Its complex structure, security is low.This patent well solves this problem, automatically opens base seal member when spray gun inserts, and 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, automatically keeping sealing when there is no spray gun, preventing flue gas from outflowing, when inserting spray gun without the need to operating base, seal can enter along with spray gun and open, and does not affect the work of spray gun; Solving existing base prevents flue gas from outflowing by flange or the mode that is threaded, and its sealing effectiveness is not good, installing/dismounting inconvenience and the technical problem of waste of manpower and time, thus can effectively solve above-mentioned problems of the prior art.
The object of the invention is realized 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, the plug bearing fixed with its inner wall sealing is provided with in inside, the front end of spray gun base, the middle part of described plug bearing is provided with the through hole passed for spray gun, plug bearing is provided with plug fixture and plug cover plate near the side of flue, described plug fixture is fixed on plug bearing, one end of plug cover plate is fixed by the rotating shaft and plug fixture being with spring, 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 fixed 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 passed through for spray gun, the inside, rear end of described spray gun base is provided with base internal thread.
As a kind of preferred embodiment, described through hole is that front end is little, and large tubaeform in rear end, 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 the 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 distance of the described distance of the plug cover plate near flue place burner hearth equals the thickness of heat-insulation layer.
As further preferred embodiment, described plug bearing, plug fixture and plug cover plate form one group of seal plug, be provided with two groups of seal plugs, and the spacing distance between two groups are greater than the length of plug cover plate in described spray gun base.
As a kind of preferred embodiment, described seal washer is three refractory seals rubber rings.
As a kind of preferred embodiment, spray gun is provided with adjustable thread block, spray gun and spray gun base in conjunction with time, described base internal thread is corresponding with adjustable thread block to be sealed.
As further preferred embodiment, described adjustable thread block by trip bolt and spray gun fastening.
As a kind of preferred embodiment, 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 being inserted by base by spray gun, the two-layer plug of base leading portion can be backed down automatically, thus gets out of the way space for spray gun enters, and when spray gun is extracted, plug can drive self-return by self gravitation and spring force, prevents flue gas from outflowing.
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 simply, safely, efficiently, automatically the placement that seal member ensures spray gun can be opened when insertion thrown in by spray gun, the base seal member self-return when spray gun is extracted, the sealing realizing base prevents flue gas from outflowing; 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 is connected 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, automatically can be backed down, can not hinder entering of spray gun when spray gun inserts, easy to use, reaches the efficient effect of application;
3. the plug of the inner leading portion of base is relying on own wt and spring force driving self-return when spray gun takes out, and automatically prevents flue gas from outflowing;
4. the first order of sealing is female thread structure, connect when there being twin-stage cover plate for sealing plug and seal washer sealing, 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, can need the restraining position of the degree of depth determination screw thread inserted, convenient adjustment according to spray gun.
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, 9-is with the rotating shaft of spring, 10-adjustable thread block, 11-trip bolt, 101-spray gun base, 102-spray gun, 103-flue, 104-heat-insulation layer.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearly understand, 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, be not intended to limit the present invention.
All features disclosed in this description, or the step in disclosed all methods or process, except the speciality mutually repelled and/or step, all can combine by any way, unless specifically stated otherwise, all can be replaced by other equivalences or the alternative features with similar object, namely, unless specifically stated otherwise, an embodiment in a series of equivalence of each feature or similar characteristics.
embodiment 1
As shown in Figure 1, Figure 2, Figure 3 shows, comprise spray gun base 101, the front end of spray gun base 101 and the heat-insulation layer 104 of flue 103 are fixed, 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.Be provided with 3 grades of sealing mechanisms in base, 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 connected 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 fixed with its inner wall sealing in inside, the front end of spray gun base 101, the middle part of described plug bearing 5 is provided with the through hole 2 passed for spray gun 102, plug bearing 5 is provided with plug fixture 6 and plug cover plate 7 near the side of flue, described plug fixture 6 is fixed on plug bearing 5, one end of plug cover plate 7 is fixed with plug fixture 6 by the rotating shaft 9 of band 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, automatically can be backed down, can not hinder entering of spray gun when spray gun inserts.
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 through this through hole 2, can forms interference fit, play the effect of sealing between spray gun and hole wall.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 the 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 shape is Wedge-shaped, up big and down small, and top pin is fixed, and is placed with spring structure simultaneously.Whole plug cover plate can pivot, and realizes opening or closing.When spray gun inserts, cover plate can be backed down as spray gun is by open position, and cover plate can realize sealing by self-return under the driving of self gravitation and spring force when 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, two groups of seal plugs are provided with in described spray gun base 101, 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 fixed with its inner wall sealing, 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 passed 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 high temperature within resistance to 200 DEG C, improves base sealing effectiveness.
First order sealing mechanism: spray gun 102 is provided with adjustable thread block 10, described adjustable thread block 10 is fastening by trip bolt 11 and spray gun 102.Adjustable thread block 10 on spray gun can need the restraining position of the degree of depth determination screw thread inserted according to spray gun, the structure adaptability of removable adjustment screw thread is strong, realizing the adjustment carrying out position while spray gun and base seal as required, spray gun 102 simple to operate and spray gun base 101 in conjunction with time, described base internal thread 1 is corresponding with adjustable thread block 10 to be sealed.
Connect when there being twin-stage cover plate for sealing plug and seal washer sealing, 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.
Engineer applied embodiment:
Application background: the CFBB testing stand of certain 3MW carries out CFB-SNCR technological development test, sprays urea, to verify denitration effect by spray gun toward boiler furnace correct position.
Application process: spray gun is inserted by base, the plug in base is convenient to entering of spray gun by jack-up automatically, and base can realize the fixing of spray gun, guarantees that pot inner flue gas of the stove can not be flowed outward by base simultaneously.
The beneficial effect reached: this base achieves 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 amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within 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 front end of spray gun base (101) and the heat-insulation layer (104) of flue (103) are fixed, spray gun (102) enters from the rear end of spray gun base (101), it is characterized in that: be provided with in inside, the front end of spray gun base (101) the plug bearing (5) fixed with its inner wall sealing, the middle part of described plug bearing (5) is provided with the through hole (2) passed for spray gun (102), plug bearing (5) is provided with plug fixture (6) and plug cover plate (7) near the side of flue, described plug fixture (6) is fixed on plug bearing (5), one end of plug cover plate (7) is fixed with plug fixture (6) by the rotating shaft (9) of band spring, 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) fixed 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 passed through for spray gun (102), the inside, rear end of described spray gun base (101) is provided with base internal thread (1).
2., as claimed in claim 1 for the spray gun self sealss header assembly of flue system, it 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 claims 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 the spring one end of rotating shaft (9) is threaded onto on rotating shaft (9), the other end is pressed on plug bearing (5).
4. as claimed in claim 3 for the spray gun self sealss header assembly of flue system, it is characterized in that: the distance of the described distance of the plug cover plate (7) near flue place burner hearth equals the thickness of heat-insulation layer (104).
5. as claimed in claim 4 for the spray gun self sealss header assembly of flue system, 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 the spacing distance between two groups is greater than the length of plug cover plate (7).
6., as claimed in claim 1 for the spray gun self sealss header assembly of flue system, it is characterized in that: described seal washer (3) is three refractory seals rubber rings.
7. as claimed in claim 1 for the spray gun self sealss header assembly of flue system, it is characterized in that: spray gun (102) is provided with adjustable thread block (10), spray gun (102) and spray gun base (101) in conjunction with time, described base internal thread (1) is corresponding with adjustable thread block (10) to be sealed.
8. as claimed in claim 7 for the spray gun self sealss header assembly of flue system, it is characterized in that: described adjustable thread block (10) is fastening by trip bolt (11) and spray gun (102).
9., as claimed in claim 1 for the spray gun self sealss header assembly of flue system, it 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 |
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| CN103791511A CN103791511A (en) | 2014-05-14 |
| CN103791511B true CN103791511B (en) | 2016-01-20 |
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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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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
Citations (5)
| 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 |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8549840B2 (en) * | 2010-11-12 | 2013-10-08 | Cummins Cal Pacific, Llc | Fluid injector |
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2014
- 2014-01-22 CN CN201410027909.6A patent/CN103791511B/en active Active
Patent Citations (5)
| 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 |
| 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 |
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| CN103791511A (en) | 2014-05-14 |
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