CN203718812U - Self-sealing tube base device of spray gun for flue system - Google Patents
Self-sealing tube base device of spray gun for flue system Download PDFInfo
- Publication number
- CN203718812U CN203718812U CN201420038199.2U CN201420038199U CN203718812U CN 203718812 U CN203718812 U CN 203718812U CN 201420038199 U CN201420038199 U CN 201420038199U CN 203718812 U CN203718812 U CN 203718812U
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- China
- Prior art keywords
- spray gun
- plug
- base
- cover plate
- flue
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Abstract
The utility model discloses a self-sealing tube base device of a spray gun for a flue system. The device comprises a spray gun tube base, plug supports which are sealed and fixedly clamped with the inner wall is arranged inside the front end of the spray gun tube base, a through hole allowing a spray gun to penetrate is formed in the middle of each plug support, a plug fixing part and a plug cover plate are arranged on one side, close to a flue, of each plug support, each plug fixing part is fixed on the corresponding plug support, one end of each plug cover plate is fixed with the corresponding plug fixing part through a rotating shaft with a spring, each plug cover plate can rotate around the corresponding rotating shaft, and the other end of each plug cover plate hermetically covers the corresponding through hole. A washer support which is hermitically and fixedly clamped with the inner wall is arranged inside the middle of the spray gun tube base, multiple stages of sealing washers are arranged in the middle of the washer support, and a hole allowing the spray gun to pass through is formed in the middle of each sealing washer. A tube-base internal thread is arranged inside the rear end of the spray gun tube base. The spray gun tube base is provided with three-stage seal, the device is simple in integral structure, safe and efficient, sealing of the tube base is realized, and flue gas is prevented from outflow.
Description
Technical field
The utility model relates to a kind of spray gun self sealss header assembly for flue system, belongs to flue tight socket technical field.
Background technology
Domestic electricity market be take coal-burning boiler substantially 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 be used spray gun toward boiler internal, to spray into reducing agent at boiler correct position.Yet 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: when 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.
Utility model content
The purpose of this utility model is: a kind of spray gun self sealss header assembly for flue system is provided, when there is no spray gun, automatically keep sealing, prevent flue gas outflow, when 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 that by flange or the mode that is threaded flue gas from outflowing, 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 utility model object 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, in the front end inside of spray gun base, be provided with the plug bearing fixing with its inner wall sealing, 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, 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 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 utility model 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 when spray gun is extracted, plug can drive self-return by self gravitation and spring force, prevents flue gas outflow.
Compared with prior art, the beneficial effects of the utility model: the utility model spray gun base 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 utility model 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 to connect 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 inserting 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 when 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 the utility model spray gun self sealss base;
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 piece, 11-trip bolt, 101-spray gun base, 102-spray gun, 103-flue, 104-heat-insulation layer.
The specific embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with embodiment, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
Disclosed all features in this description, or the 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 to connect 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 inserting 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.When 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 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, 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, when 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.
Described in this utility model, base is not limited to be applied on boiler SCR or SNCR spray gun, also can be applicable to other and the utility model 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 utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.
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: in the front end inside of spray gun base (101), be provided with the plug bearing (5) fixing with its inner wall sealing, 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 the 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) and the corresponding sealing of 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 |
|---|---|---|---|
| CN201420038199.2U CN203718812U (en) | 2014-01-22 | 2014-01-22 | Self-sealing tube base device of spray gun for flue system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420038199.2U CN203718812U (en) | 2014-01-22 | 2014-01-22 | Self-sealing tube base device of spray gun for flue system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203718812U true CN203718812U (en) | 2014-07-16 |
Family
ID=51157959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420038199.2U Withdrawn - After Issue CN203718812U (en) | 2014-01-22 | 2014-01-22 | Self-sealing tube base device of spray gun for flue system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203718812U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103791511A (en) * | 2014-01-22 | 2014-05-14 | 东方电气集团东方锅炉股份有限公司 | Spraying gun self-sealing tube base device for flue system |
-
2014
- 2014-01-22 CN CN201420038199.2U patent/CN203718812U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103791511A (en) * | 2014-01-22 | 2014-05-14 | 东方电气集团东方锅炉股份有限公司 | Spraying gun self-sealing tube base device for flue system |
| CN103791511B (en) * | 2014-01-22 | 2016-01-20 | 东方电气集团东方锅炉股份有限公司 | A kind of spray gun self sealss header assembly for flue system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140716 Effective date of abandoning: 20160120 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |