CN101614294B - Negative pressure explosion-proof valve - Google Patents
Negative pressure explosion-proof valve Download PDFInfo
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- CN101614294B CN101614294B CN2009100748401A CN200910074840A CN101614294B CN 101614294 B CN101614294 B CN 101614294B CN 2009100748401 A CN2009100748401 A CN 2009100748401A CN 200910074840 A CN200910074840 A CN 200910074840A CN 101614294 B CN101614294 B CN 101614294B
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- ring
- negative pressure
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- valve plate
- proof valve
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Abstract
The invention relates to a negative pressure explosion-proof valve with a flat sealing surface. The structure of the invention is that a plurality of elastic expansion open and close control mechanisms which are provided with springs and are distributed evenly around the periphery are arranged in an interlayer of the double-layer ring type tank body, wherein, the lower end of the elastic expansion open and close control mechanism is connected with a valve plate which closes over the lower opening of the double-layer ring type tank body. The negative pressure explosion-proof valve in the invention is a reusable automatic valve which can automatically open or close by utilizing the structure of the valve itself under certain negative pressure conditions; by timely balancing and adjusting medium pressure in the gas flue of the deduster outlet, over negative pressure running of the dedusting system can be prevented, and cracking and explosion of dedusters and gas flue pipes can be further prevented. The invention is applicable to the dedusting system of boiler soot and gas in a thermoelectric plant and dedusting systems of sintering, pelletizing and coking soot and gas in industries like iron and steel and metallurgy and the like.
Description
Technical field
The present invention relates to a kind of gate valve with flat sealing surface, is a kind of negative pressure explosion-proof valve particularly.
Background technique
The flue dust gas of the sintering of industries such as the boiler smoke gas of thermoelectricity plant and Ferrous Metallurgy, pelletizing, coking is in the negative pressure operation through after the dedusting on the deduster exhaust pass.In case it is unusual that system's operation occurs, blower fan remains in operation, and causes the negative pressure in the deduster exhaust pass to increase sharply.If continue this state, will take place that deduster and flue break even serious consequences such as blast and blower fan stall scaling loss.
Summary of the invention
Purpose of the present invention just provides a kind of negative pressure explosion-proof valve, to solve the existing safety in production hidden danger of described flue dust gas dust pelletizing system.
The present invention is achieved in that a kind of negative pressure explosion-proof valve, in the interlayer of the ring-like casing of bilayer, be provided with the elastic telescopic opening-closing control mechanism of some band springs that are uniformly distributed along the circumference, the following termination valve plate of described elastic telescopic opening-closing control mechanism, valve plate is sealed on the lower end mouth of double-deck ring-like casing.
The present invention is a kind of heavy caliber negative pressure explosion-proof valve, is installed on the exhaust pass of deduster.Flue gas pressures in flue after the dedusting keeps just often, and this negative pressure explosion-proof valve is in closed condition, and whole dust-removal system is normally moved.In case the operation of dust pelletizing system occurs unusual, flue gas pressures drops to setting value when following after the deduster outlet dedusting, the valve plate of this negative pressure explosion-proof valve is opened under the active force of big negative pressure automatically, and extraneous air can enter into rapidly in the deduster exhaust pass by this negative pressure explosion-proof valve.It is low more that pressure in the deduster exhaust pass descends, and this negative pressure is just big more to the active force of this negative pressure explosion-proof valve valve plate, and the valve plate open amount is also just big more, and the air inlet is just many more.Pressure recovery in the deduster exhaust pass is behind normal value, and this negative pressure explosion-proof valve is promptly closed under the effect of described elastic telescopic opening-closing control mechanism automatically.
Negative pressure explosion-proof valve of the present invention is a kind of important device that guarantees normal operation of dust pelletizing system and personal device security, can and adjust the interior pressure medium of deduster exhaust pass by timely balance, prevent the super negative pressure operation of dust pelletizing system, and then prevent breaking and exploding of deduster and flue.The present invention is applicable to sintering, the pelletizing of industries such as the boiler smoke dedusting system of thermoelectricity plant and iron and steel, metallurgy, the flue dust gas dust pelletizing system of coking.
The elastic telescopic opening-closing control mechanism of negative pressure explosion-proof valve of the present invention is divided into tension spring type and pressure spring type structure, corresponding to negative pressure explosion-proof valve, also just can be divided into tension spring type negative pressure explosion-proof valve and pressure spring type negative pressure explosion-proof valve thereupon.
Described elastic telescopic opening-closing control mechanism in the tension spring type negative pressure explosion-proof valve is: by connecing regulating lever on the spring, connect pull bar down; The upper end of described regulating lever passes the end face of the ring-like casing of described bilayer, and adjusting nut and locknut are threaded; Described pull bar lateral opening from the described valve plate upwards penetrates, and there is the end cap pocket pull bar lower end in the lateral opening bottom surface of valve plate.
Upper end at described regulating lever is snapped with the threaded bush, and threaded bush's lower edge is positioned at the end face of the ring-like casing of described bilayer.
Be provided with some guide rods that are uniformly distributed along the circumference in the interlayer of the ring-like casing of described bilayer, the lower end of guide rod is fixed on the described valve plate.
Be provided with guide wheel assembly in the interlayer of the ring-like casing of described bilayer, on the described guide wheel assembly upper saw pulley be housed, described upper saw pulley rides over the side of described pull bar or described guide rod.
Be provided with seal ring at the end face of described valve plate or the end opening bottom surface of the ring-like casing of described bilayer.
A kind of implementation of the described elastic telescopic opening-closing control mechanism in the pressure spring type negative pressure explosion-proof valve is: by spring pull bar cross-under pressure ring, the lower end of spring pull bar passes lateral opening on the base plate of the ring-like casing of described bilayer and the described valve plate, and adjusting nut and locknut are threaded; Spring housing is connected on the described spring pull bar between the base plate of described pressure ring and the ring-like casing of described bilayer.
Cross-under has some directional posts between the bottom surface of described pressure ring and the ring-like casing of described bilayer, the lower end of directional post be threaded adjusting nut and locknut; Be provided with guide wheel assembly in the ring-like casing of described bilayer, on the described guide wheel assembly upper saw pulley be housed, upper saw pulley rides over the side of described directional post.
Described directional post and described spring pull bar are along the circumferentially-spaced of the ring-like casing of described bilayer.
The another kind of implementation of the described elastic telescopic opening-closing control mechanism in the pressure spring type negative pressure explosion-proof valve is: by spring pull bar cross-under pressure ring, the bottom of spring pull bar passes lateral opening on the base plate of the ring-like casing of described bilayer and the described valve plate, the lower end of spring pull bar be threaded adjusting nut and locknut; The tubular spring housing is contained in the ring-like casing of described bilayer, and its above and below contacts with the base plate of described pressure ring and the ring-like casing of described bilayer respectively.
The mounting type of pressure spring type negative pressure explosion-proof valve of the present invention and tension spring type negative pressure explosion-proof valve and action mechanism basically identical, different is the opening and closing of valve plate, and the former is the pressure by spring, and the latter is the pulling force by spring.
Description of drawings
Fig. 1 is the structural representation of tension spring type negative pressure explosion-proof valve.
Fig. 2 is the structural representation of pressure spring type negative pressure explosion-proof valve.
Embodiment 1:
In the tension spring type negative pressure explosion-proof valve of Fig. 1, double-deck ring-like casing 1 is to be welded by two anisodiametric cylinders and last ring-like plate, following ring-like plate, the internal diameter of following ring-like plate and the internal diameter basically identical of inner core or smaller, the external diameter of following ring-like plate is greater than the external diameter of urceolus.The place of extending out at following ring-like plate leaves flange hole, so that dock installation with the adapter 11 on the deduster exhaust pass.The lower end of pull bar 3 is fixed on the lateral opening place of valve plate 10, and the following ring-like plate that double-deck ring-like casing 1 is passed in the upper end is connected with the lower end of spring 4.The bar footpath of pull bar 3 is less than the penetration hole diameter of following ring-like plate, so that pull bar is not produced collision or friction when moving up and down.The last ring-like plate of ring-like casing 1 is passed in the lower end of regulating lever 5, is connected with the upper end of spring 4.Regulating lever 5 tops be threaded an adjusting nut 7 and a locknut.Rotate adjusting nut 7 and can adjust the pulling force of spring 4, lock with locknut again after adjusting by regulating lever 5.Top at regulating lever 5 also is connected with threaded bush 8, with the screw thread that exposes of protection regulating lever 5 upper ends.In addition, a nonmetallic gasket is housed in the bottom surface of adjusting nut 7, after threaded bush 8 tightens, can prevent ambient air from the last ring-like plate of regulating lever 5 and double-deck ring-like casing 1 by entering in the deduster exhaust pass.Guide wheel assembly 2 is fixed on the last plane of following ring-like plate of double-deck ring-like casing 1, and pull bar 3 is lived in two guide wheel pressings on the guide wheel assembly 2, to guarantee that valve plate 10 does not produce radial displacement after keying.
The elastic telescopic opening-closing control mechanism of forming this negative pressure explosion-proof valve by pull bar 3, spring 4, regulating lever 5, adjusting nut 7 and guide wheel assembly 2 etc.This mechanism should be provided with three groups at least, and along the circumference uniform distribution of double-deck ring-like casing 1.Its quantity can be decided according to the caliber size of negative pressure explosion-proof valve and the height of pressure, operates steadily in opening-closing process reliably in order to valve plate 10.This negative pressure explosion-proof valve is if the level installation, the elastic telescopic opening-closing control mechanism should be uniform four groups (as more than four groups, except that four groups have guide wheel assembly, all the other can not establish guide wheel assembly), can guarantee valve plate 10 like this in opening-closing process, guiding all be arranged at four direction up and down.
Valve plate 10 is held by the some pull bars 3 that are fixed on its edge, and under the tension of spring 4, is close on the lower plane of following ring-like plate of double-deck ring-like casing 1.Between the following ring-like plate lower plane of valve plate 10 and double-deck ring-like casing 1, be provided with seal ring 9.
Flue gas negative pressure operation in the deduster exhaust pass after the dedusting.Pressure just often, valve plate 10 presses down tight seal 9 at the pulling force of spring 4, this moment, the pulling force of spring 4 gave the active force of valve plate 10 greater than negative pressure, this negative pressure explosion-proof valve is closed.In case dust pelletizing system operation irregularity, pressure in the deduster exhaust pass is reduced to below the regulation numerical value, valve plate 10 promptly moves down under this suction function power, the mesopore of ambient air this moment by negative pressure explosion-proof valve, by the space between the following ring-like plate lower plane of valve plate 10 and double-deck ring-like casing 1, enter in the deduster exhaust pass by valve plate 10 peripheries and spaces between the deduster exhaust pass adapter 11 again, the interior pressure of deduster exhaust pass is recovered rapidly.When returning to the authorized pressure value, spring 4 with drawing on the valve plate 10, is got back to closed position again.
Embodiment 2:
Present embodiment can be referring to the tension spring type negative pressure explosion-proof valve of Fig. 1, its overall structure and embodiment's 1 structure is basic identical, just in the interlayer of the ring-like casing 1 of bilayer, be provided with some guide rods that are uniformly distributed along the circumference, the lower end of guide rod is fixed on the valve plate 10, the upper end of guide rod can be free end, and its length should be able to guarantee that valve plate finishes normal switching motion.Upper saw pulley in the interlayer of the ring-like casing 1 of bilayer on the set guide wheel assembly 2 is the side that rides over each guide rod, and does not contact with pull bar 3.
This structure can suitably shorten the length of pull bar 3, thereby reduces the whole height of negative pressure explosion-proof valve.
Embodiment 3:
In the pressure spring type negative pressure explosion-proof valve of Fig. 2, be still by urceolus, inner core, go up ring-like plate and down ring-like plate connect to form double-deck ring-like casing 1, the sponson of following ring-like plate is provided with flange hole, with the deduster exhaust pass on adapter 11 connect.The ring-like casing 1 of bilayer respectively cross-under directional post 12 and spring pull bar 14 are arranged.Directional post 12 is equipped with end cap with the upper end of spring pull bar 14.The cylinder of directional post 12 passes the lateral opening of the following ring-like plate of pressure ring 13, double-deck ring-like casing 1 and valve plate 10 and stretches out downwards; The body of rod of spring pull bar 14 stretches out downwards after passing the following ring-like plate of pressure ring 13, spring 4, double-deck ring-like casing 1 and valve plate 10 lateral opening.The lower end of directional post 12 and spring pull bar 14 be threaded respectively adjusting nut 7 and locknut, in order to adjusting the distance between pressure ring 13 and the valve plate 10, and then the pressure of adjustment spring 4.Keep certain clearance between the Internal and external cycle edge of pressure ring 13 and the inside and outside barrel of double-deck ring-like casing 1, so that pressure ring unlikely generation collision and friction when moving up and down.
The elastic telescopic opening-closing control mechanism of this negative pressure explosion-proof valve is made up of spring 4, spring pull bar 14, pressure ring 13 and adjusting nut 7 etc.This mechanism should be provided with three groups at least, and along the circumference uniform distribution of double-deck ring-like casing 1.Its quantity can be decided according to the caliber size of negative pressure explosion-proof valve and the height of pressure, operates steadily in opening-closing process reliably in order to valve plate 10.
Be provided with guide wheel assembly 2 in the ring-like casing 1 of bilayer, on the guide wheel assembly 2 upper saw pulley be housed, upper saw pulley rides over the side of directional post 12.Directional post 12 and the circumferentially-spaced of spring pull bar 14 along double-deck ring-like casing 1.For the negative pressure explosion-proof valve that substantially horizontal is installed and used, four groups of directional posts and guide wheel assembly preferably are set, so just can lead to valve plate on the four direction up and down, thereby guarantee valve plate 10 accurate return after unlatching.
Valve plate 10 is fastening with it by the adjusting nut 7 and the locknut of spring pull bar 14 lower ends, and makes plane on it be close to the lower plane of the following ring-like plate of double-deck ring-like casing 1 by the elastic acting force of spring 4.Between this two plane, be provided with seal ring 9.
Embodiment 4:
Present embodiment can be referring to the pressure spring type negative pressure explosion-proof valve of Fig. 2, its overall structure and embodiment's 3 structure is basic identical, elastic telescopic opening-closing control mechanism wherein is by spring pull bar 14 cross-under pressure rings 13, the bottom of spring pull bar 14 passes lateral opening on the base plate of double-deck ring-like casing 1 and the valve plate 10, the lower end of spring pull bar 14 be threaded adjusting nut 7 and locknut; Tubular spring 4 is sleeved in the ring-like casing 1 of described bilayer, and its above and below contacts with the base plate of described pressure ring 13 and the ring-like casing 1 of described bilayer respectively.
Present embodiment and embodiment's 3 the main distinction is to use the tubular compression spring sleeve of an integral body to be contained in the interlayer of double-deck ring-like casing 1, to replace the setting of several discrete springs.Like this, in the elastic telescopic opening-closing control mechanism, just can save the setting of directional post 12 and guide wheel assembly 2, thereby make that the structure of negative pressure explosion-proof valve is simplified.
Claims (3)
1. negative pressure explosion-proof valve, it is characterized in that in the interlayer of the ring-like casing of bilayer (1), being provided with the elastic telescopic opening-closing control mechanism of some band springs that are uniformly distributed along the circumference, the following termination valve plate (10) of described elastic telescopic opening-closing control mechanism, described valve plate (10) is sealed on the lower end mouth of double-deck ring-like casing (1);
Described elastic telescopic opening-closing control mechanism connects pull bar (3) down by connecing regulating lever (5) on the spring (4); The upper end of described regulating lever (5) passes the end face of the ring-like casing of described bilayer (1), adjusting nut that is threaded (7) and locknut; Described pull bar (3) lateral opening from the described valve plate (10) upwards penetrates, and there is the end cap pocket pull bar lower end in the lateral opening bottom surface of valve plate;
Be provided with some guide rods that are uniformly distributed along the circumference in the interlayer of the ring-like casing of described bilayer (1), the lower end of guide rod is fixed on the described valve plate (10);
Be provided with guide wheel assembly (2) in the interlayer of the ring-like casing of described bilayer (1), described guide wheel assembly is equipped with upper saw pulley on (2), and described upper saw pulley rides over the side of described pull bar (3) or described guide rod.
2. negative pressure explosion-proof valve according to claim 1 is characterized in that being snapped with threaded bush (8) in the upper end of described regulating lever (5).
3. negative pressure explosion-proof valve according to claim 1 and 2 is characterized in that being provided with seal ring (9) at the end face of described valve plate (10) or the end opening bottom surface of the ring-like casing of described bilayer (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100748401A CN101614294B (en) | 2009-07-09 | 2009-07-09 | Negative pressure explosion-proof valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100748401A CN101614294B (en) | 2009-07-09 | 2009-07-09 | Negative pressure explosion-proof valve |
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| Publication Number | Publication Date |
|---|---|
| CN101614294A CN101614294A (en) | 2009-12-30 |
| CN101614294B true CN101614294B (en) | 2011-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009100748401A Expired - Fee Related CN101614294B (en) | 2009-07-09 | 2009-07-09 | Negative pressure explosion-proof valve |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104696565A (en) * | 2015-03-30 | 2015-06-10 | 济南大学 | Guide structure based anti-explosion valve |
| CN106310574B (en) * | 2016-08-31 | 2019-01-25 | 大庆市让胡路区昊淼消防设备制造有限责任公司 | It is a kind of for conveying the device of fire-fighting foams liquid |
| CN108731497A (en) * | 2017-04-18 | 2018-11-02 | 中国石油天然气股份有限公司 | Liquid level control device and steam condenser with same |
| CN108302233B (en) * | 2018-01-31 | 2023-10-17 | 江苏爵格工业集团有限公司 | Explosion venting device with guide device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201462129U (en) * | 2009-07-09 | 2010-05-12 | 邢建栋 | Negative-pressure anti-explosion valve |
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- 2009-07-09 CN CN2009100748401A patent/CN101614294B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201462129U (en) * | 2009-07-09 | 2010-05-12 | 邢建栋 | Negative-pressure anti-explosion valve |
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| CN101614294A (en) | 2009-12-30 |
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