CN201387019Y - Throttle ring capable of adjusting flow rate - Google Patents
Throttle ring capable of adjusting flow rate Download PDFInfo
- Publication number
- CN201387019Y CN201387019Y CN200920115389U CN200920115389U CN201387019Y CN 201387019 Y CN201387019 Y CN 201387019Y CN 200920115389 U CN200920115389 U CN 200920115389U CN 200920115389 U CN200920115389 U CN 200920115389U CN 201387019 Y CN201387019 Y CN 201387019Y
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- throttle
- flashboard
- nut
- cavity
- screw rod
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Abstract
The utility model discloses a throttle ring capable of adjusting flow rate, which comprises a casing (6). A cavity (61) is disposed inside the casing (6), a valve body channel (8) is communicated with the cavity (61), a flashboard component for shielding the valve body channel (8) is placed inside the cavity (61), and the flashboard component is movably connected with the casing (6). The throttle ring is capable of freely adjusting real required flow areas.
Description
Technical field
The utility model relates to a kind of throttle.
Background technology
Current, owing to influenced by global financial crisis, industry-by-industry constantly carries out the exploitation of new technology and core technology, to spend this crisis; Add the more and more attention of country, cause the Related product of some power industries not catch up with production and environmental protection requirement, need carry out technological improvement one after another environmental protection industry (epi).The application of modern considerable coal-fired boiler unit pulverized-coal system is quite general, and whether each burner primary wind and powder distributed uniform is one of key factor of decision boiler combustion operating mode in the unit pulverized-coal system.The primary air velocity of each burner of reasonable disposition and coal powder density are the essential condition that guarantees boiler unit safety, economical operation, also are the preconditions of low NOx combusting technology smooth implementation.
An airduct wind powder that exports between each burner distributes uneven, catching fire and surely combustion of burner outlet breeze airflow will directly be influenced, cause eccentricity of fire, wash away furnace wall, furnace load and steam temperature deviation, the NOx discharge capacity increases, also can cause coal dust deposition in the horizontal pipe, cause plugging, cause that corresponding burner burns out, having a strong impact on the security and the economy of unit operation.Because of airduct wind powder distributes the uneven example that causes boiler normally not move too numerous to enumerate.Bear under the more and more stricter situation of peak regulation task and environmental requirement at unit, one time airduct wind powder distributing uniformity more seems particularly important.Power industry standard " thermal power plant coal dust preparation system design standard and computational methods " is clear and definite regulation in the 8.1st (DL/T5154-2002), to the medium-speed pulverizer unit pulverized-coal system, answer uniform distribution with coal dust and air between each airduct of layer burner, its air quantity deviation is not more than ± 8%, coal dust distribute deviation be not more than ± 10%.
Throttle is a kind of throttling arrangement that is used on the coal pulverizer outlet primary wind and powder pipe, and throttle can change each pipe interior orifice size, to reach the effect that changes flow in the pipeline.As far back as the 80s and 90s, just have domestic power plant to use throttle to change the wind speed size in the airduct one time, but effect is not very desirable always, lack and cost an arm and a leg its service life.The major technique and the performance indications of throttle are as follows at present:
The fixation type throttle circle, flow area: 1/3 cross-sectional area～entire cross section, but on a certain size, just fixed and can not change.Through-flow size: DN200～DN500 only can regulate in single flow area, once determining, just can not change.
Along with updating of combustion technology, these fixation type throttle circles can not satisfy present novel combustion technology, because therefore it can not satisfy the wind powder distributed uniform problem of each pipeline at any time with the size of the inner gatage of the adjusting throttle of carving.This kind fixation type throttle circle because flashboard can not be regulated arbitrarily, has therefore limited the development of novel combustion technology greatly.
The utility model content
The technical problems to be solved in the utility model provides a kind of throttle of adjustable throttle amount, uses this throttle can regulate actual required flow area arbitrarily.
In order to solve the problems of the technologies described above, the utility model provides a kind of throttle of adjustable throttle amount, establishes the housing of cavity in comprising, valve channel is connected with cavity, be provided with the flashboard assembly that is used to block valve channel in cavity, this flashboard assembly and housing are movably connected.
Improvement as the throttle of the novel adjustable throttle amount of this use: in establish passage nut tube and housing be fixedly linked, passage is connected with cavity; The connecting screw rod and the nut tube that are positioned at passage are rotatedly connected, and the nut that matches with it is set on connecting screw rod, and nut and flashboard assembly are fixedly linked.
Further improvement as the throttle of the novel adjustable throttle amount of this use: flashboard assembly comprises the shank of flashboard and hollow, and an end and the nut of shank is fixedly linked, the other end and flashboard are fixedly linked.
Further improvement as the throttle of the novel adjustable throttle amount of this use: flashboard is selenodont.
Further improvement as the throttle of the novel adjustable throttle amount of this use: the top at connecting screw rod is provided with regulating handle.
Further improvement as the throttle of the novel adjustable throttle amount of this use: on the surface of flashboard ceramic protective surface is set, ceramic guard circle is set at the inner surface of valve channel.
The throttle of adjustable throttle amount of the present utility model because flashboard assembly and housing are movably connected, therefore can change the flow area of valve channel by the upper-lower position of regulator board component in the housing cavity.The throttle of adjustable throttle amount of the present utility model is simple in structure, easy to operate, only needs to rotate regulating handle nut is moved up and down along connecting screw rod, moves up and down thereby drive flashboard.Use the throttle of adjustable throttle amount of the present utility model, can improve an airduct windward powder greatly and distribute uneven problem, burning for the optimization of boiler provides safety assurance.
Description of drawings
Below in conjunction with accompanying drawing the specific embodiment of the present utility model is described in further detail.
Fig. 1 is the schematic top plan view of the throttle of adjustable throttle amount of the present utility model;
Fig. 2 is the generalized section that the A-A among Fig. 1 cuts open;
Fig. 3 is the local enlarged diagram of Fig. 2;
Fig. 4 is the schematic diagram of Fig. 2 under another kind of state.
The specific embodiment
Fig. 1～Fig. 4 establishes the housing 6 of cavity 61 in conjunction with the throttle that has provided a kind of adjustable throttle amount in comprising, valve channel 8 vertically is connected with this cavity 61, is provided with the flashboard assembly that is used to block valve channel 8 in cavity 61.Flashboard assembly comprises the shank 71 of flashboard 72 and hollow, and the lower end of shank 71 and flashboard 72 are fixedly linked.
In establish passage 31 the upper surface of nut tube 3 and housing 6 vertically be fixedly linked, the passage 31 of nut tube 3 is connected with the cavity 61 of housing 6; In order to guarantee sealing, between the upper surface of nut tube 3 and housing 6, sealing strip 5 is set.
Connecting screw rod 2 is positioned at the passage 31 of nut tube 3, and the end face 32 of nut tube 3 is provided with through hole, and the top of connecting screw rod 2 links to each other with regulating handle 1 after passing the through hole of this end face 32, so regulating handle 1 is positioned at the outside of nut tube 3.
Be provided with positioning boss 21 on connecting screw rod 2, this positioning boss 21 is positioned on the end face 32 of nut tube 3, and the lower surface of positioning boss 21 is pasting end face 32.Fixture block 9 is fixed on the end face 32, and positioning boss 21 is clamped between fixture block 9 and the end face 32, and promptly the upper surface of positioning boss 21 is pasting fixture block 9.Therefore, connecting screw rod 2 can't move up and down, and connecting screw rod 2 can only rotate in the through hole of end face 32, thereby has realized being rotatedly connected of connecting screw rod 2 and nut tube 3.In order to increase sealing, can between the end face 32 of connecting screw rod 2 and nut tube 3, the wear-resistant seal circle be set.
The nut 4 match with it is set on connecting screw rod 2, so nut 4 is positioned at the passage 31 of nut tube 3, the upper end of shank 71 and nut 4 are fixedly linked.Cavity diameter in the shank 71 is greater than the external diameter of connecting screw rod 2, and therefore when nut 4 drives shanks 71 and moves up, connecting screw rod 2 can enter in the interior cavity of shank 71.
Flashboard 72 is selenodont, and promptly the bottom has the circle of breach, and this circular diameter equals or be slightly larger than the internal diameter of valve channel 8.Ceramic protective surface 73 is set on the surface of flashboard 72, in order to save material, can only in the front of flashboard 72 ceramic protective surface 73 be set, the front of flashboard 72 refers to that face over against the air inlet of valve channel 8.At valve channel 8 whole inner surfaces ceramic guard circle 81 is set.Pottery protective surface 73 can be protected the impact of breeze airflow to flashboard 72 effectively, and in like manner, ceramic guard circle 81 can be protected the impact of breeze airflow to valve channel 8 effectively; Thereby prolong the service life of whole throttle effectively.
The throttle of adjustable throttle amount of the present utility model, practical work process is as follows:
1, rotate counterclockwise regulating handle 1, connecting screw rod 2 is rotated counterclockwise, nut 4 can't rotate under the effect of whole flashboard assembly gravity, so nut 4 moves up along connecting screw rod 2.When nut 4 contacted with the end face 32 of nut tube 3, nut 4 just can not move up again; At this moment, flashboard 72 is positioned at the top (as shown in Figure 4) of whole valve body passage 8; The through-current capacity maximum of the throttle under this state is whole flow area of valve channel 8.
2, clockwise rotate regulating handle 1, connecting screw rod 2 is clockwise rotated, nut 4 can't rotate under the effect of whole flashboard assembly gravity, so nut 4 moves down along connecting screw rod 2.When nut 4 contacted with the bottom surface 33 of nut tube 3, nut 4 just can not move down again; At this moment, flashboard 72 has blocked 2/3 flow area (as shown in Figure 2) of valve channel 8, and the through-current capacity minimum of the throttle under this state has only 1/3 flow area of valve channel 8.
At last, it is also to be noted that what more than enumerate only is a specific embodiment of the present utility model.Obviously, the utility model is not limited to above embodiment, and many distortion can also be arranged.All distortion that those of ordinary skill in the art can directly derive or associate from the disclosed content of the utility model all should be thought protection domain of the present utility model.
Claims (6)
1, a kind of throttle of adjustable throttle amount, establish the housing (6) of cavity (61) in comprising, valve channel (8) is connected with described cavity (61), is provided with the flashboard assembly that is used to block valve channel (8) in cavity (61), it is characterized in that: described flashboard assembly and housing (6) are movably connected.
2, the throttle of adjustable throttle amount according to claim 1, its feature: in establish passage (31) nut tube (3) be fixedly linked with housing (6), described passage (31) is connected with cavity (61); The connecting screw rod (2) that is positioned at passage (31) is rotatedly connected with nut tube (3), goes up at connecting screw rod (2) nut (4) that matches with it is set, and described nut (4) is fixedly linked with flashboard assembly.
3, the throttle of adjustable throttle amount according to claim 2, it is characterized in that: described flashboard assembly comprises the shank (71) of flashboard (72) and hollow, and an end of described shank (71) and nut (4) are fixedly linked, the other end and flashboard (72) are fixedly linked.
4, the throttle of adjustable throttle amount according to claim 3 is characterized in that: described flashboard (72) is selenodont.
5, the throttle of adjustable throttle amount according to claim 4 is characterized in that: be provided with regulating handle (1) at the top of connecting screw rod (2).
6, the throttle of adjustable throttle amount according to claim 5 is characterized in that: on the surface of flashboard (72) ceramic protective surface (73) is set, at the inner surface of valve channel (8) ceramic guard circle (81) is set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920115389U CN201387019Y (en) | 2009-03-16 | 2009-03-16 | Throttle ring capable of adjusting flow rate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920115389U CN201387019Y (en) | 2009-03-16 | 2009-03-16 | Throttle ring capable of adjusting flow rate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201387019Y true CN201387019Y (en) | 2010-01-20 |
Family
ID=41579553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920115389U Expired - Fee Related CN201387019Y (en) | 2009-03-16 | 2009-03-16 | Throttle ring capable of adjusting flow rate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201387019Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102242542A (en) * | 2010-05-11 | 2011-11-16 | 上海市政工程设计研究总院 | Flow-regulating directional valve |
| CN103017528A (en) * | 2012-12-19 | 2013-04-03 | 中冶长天国际工程有限责任公司 | Micropressure regulating system for sintering ignition furnace |
-
2009
- 2009-03-16 CN CN200920115389U patent/CN201387019Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102242542A (en) * | 2010-05-11 | 2011-11-16 | 上海市政工程设计研究总院 | Flow-regulating directional valve |
| CN103017528A (en) * | 2012-12-19 | 2013-04-03 | 中冶长天国际工程有限责任公司 | Micropressure regulating system for sintering ignition furnace |
| CN103017528B (en) * | 2012-12-19 | 2015-03-11 | 中冶长天国际工程有限责任公司 | Micropressure regulating system for sintering ignition furnace |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100120 Termination date: 20130316 |