CN102927669A - Bilateral shock-wave resistant air vent valve - Google Patents
Bilateral shock-wave resistant air vent valve Download PDFInfo
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- CN102927669A CN102927669A CN2012104808992A CN201210480899A CN102927669A CN 102927669 A CN102927669 A CN 102927669A CN 2012104808992 A CN2012104808992 A CN 2012104808992A CN 201210480899 A CN201210480899 A CN 201210480899A CN 102927669 A CN102927669 A CN 102927669A
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- shock wave
- spool
- valve body
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Abstract
The invention relates to heating and ventilation equipment for buildings, particularly to heating and ventilation equipment for buildings in case of explosion, and particularly provides a bilateral shock-wave resistant air vent valve, which includes a valve body and valve cores, wherein the valve body forms a valve body framework with a front cover, a rear cover, a beam A and a beam B. The bilateral shock-wave resistant air vent valve is characterized in that holes are arranged in the valve body and communicated with the front cover and the rear cover; the valve cores are placed in the holes and performs translational movement inside the holes; the bilateral shock-wave resistant air vent valve further includes a reset device connected with the valve body and the valve cores respectively; under the normal ventilation condition, the valve cores are placed inside the middle parts of the holes under the acting force of the reset device, and when explosive shock wave impacts the valve cores and force exerted on the valve cores within the action scope of the shock wave exceeds the set value of the reset device, the valve cores move toward one sides of the holes gradually to close a ventilation passage. The invention has the advantages that the bilateral shock-wave resistant air vent valve can be used for protecting the building and inside facilities in case of shock wave, and meets the requirement for ventilation under the normal condition.
Description
Technical field
The present invention relates to the heating and ventilating equipment of building, relate in particular to the heating and ventilating equipment of building when blasting, be specially a kind of bilateral shock wave resistance ventilation valve.
Background technology
As shown in Figure 1, explosion wave mainly contains two stages and can produce large broken ring: the phase I be blast when occuring explosion center point emit 3000 high temperature and several ten thousand atmospheric shock waves about spending thereupon.Shock wave with the sphere form at a high speed to around mobile, this shock wave object is had very large impact cutting ring power.The thereupon increase of shock wave displacement, the pressure of shock wave is decay rapidly; Second stage be the air of explosion center point because the effect of inertia of fluctuation, air occurs to be shunk and produce negative pressure, incident is once strong suction wave.When suction wave produces, build internal gas pressure greater than outdoor air pressure, thereby ventilation valve is produced the thrust of from-inner-to-outer.The suction wave of some strength can cause brokenly ring to facility in the building equally, particularly when ventilation valve is very near by explosion center.
Such as the shock wave resistance ventilation valve of Fig. 2, prior art shown in Figure 3, all adopt the mode of moving vane rotation to close or open vent passages.When normal the ventilation, apply certain torsion by spring mechanism to blade, make it open to set angle, ventilation function is provided.When being subject to shock wave and impacting, the torsion that produces when the shock wave pressure that puts on blade is during greater than design torsion, and blade is closed, and prevents that shock wave from entering shielded Architectural Equipment.Existing shock wave resistance ventilation valve all considers to tackle the impact of malleation shock wave, but when suction wave arrives, as shown in Figure 4, the shock wave resistance ventilation valve of prior art will be opened blade automatically to maximum angle, thereby can not provide enough protection for building interior facility.
Summary of the invention
The technical problem to be solved in the present invention is: a kind of two stages that malleation is impacted and negative pressure is impacted at blast impulse are provided, all can protect facility in building and the building, and when normal condition, can satisfy the bilateral shock wave resistance ventilation valve of satisfactory draught capacity.
The object of the present invention is achieved like this:
Bilateral shock wave resistance ventilation valve comprises valve body and spool, and valve body consists of the valve body framework by protecgulum, bonnet, Liang Jia and Liang Yi, it is characterized in that, described valve body is provided with the hole, and described hole connects protecgulum and bonnet; Described spool places in the described hole and can translation in described hole, also comprise resetting means, described resetting means connects respectively described valve body and described spool, under the normal ventilation condition, described spool is in the middle part in described hole by the active force of described resetting means, when the described spool of blast impulse wave impact, and the stressed setting value that surpasses described resetting means of the described spool in shock wave territory, described spool is to a side shifting in described hole, until close vent passages.
Hole on wherein said spool and the described valve body is complementary, can translation in described hole to guarantee described spool, the cross section of described spool can be round, also can be rectangle etc.
Generally, air between the described bilateral shock wave resistance ventilation valve outside and the described bilateral shock wave resistance ventilation valve inboard can carry out convection current by vent passages, but after described bilateral shock wave resistance ventilation valve is subject to malleation or negative pressure impact, described spool is to a side shifting, until close vent passages.
Described resetting means is stage clip, and described stage clip is arranged at the both sides of described spool, and described spool is connected with described valve body by described stage clip.Described stage clip can be arranged at the both sides of described spool symmetrically.
Also comprise axle, described stage clip is through on the axle, and described spool is provided with through hole, and described axle passes described through hole and is connected with valve body.
Described valve body also comprises right baffle-plate and the right baffle plate that is respectively in longitudinal centre line both sides, described hole, described right baffle-plate and described right baffle plate are positioned at the valve body framework and are fixed on the valve body framework, and described right baffle-plate comprises upper left baffle plate and the lower-left baffle plate of the both sides that are respectively in described hole cross central line; Described right baffle plate comprises the upper right baffle plate in both sides and the bottom right baffle plate that is respectively in described hole cross central line.
Further, also comprise framework, described valve body fixing with described framework on, described framework is used for fixing with building masonry wall.
Further, also be provided with shock wave peak records device, described shock wave peak records device is fixed on the described framework.Described shock wave peak records device comprises lower cover, upper rack, axle A, spring A, spring B and lower tooth bar; Described spring A places and covers under described, and described lower tooth bar places on the described spring A; Described upper rack and described spring B are through on the described axle A, and described axle A two ends and described lower cover are fixed, and the described lower cover of described spring B two ends butt and described upper rack; Described upper rack places on the described lower tooth bar.Also be provided with loam cake, described loam cake is covered on and covers and detachably be fixedly connected with described lower cover under described.
Further, also comprise pad, described pad is arranged between described spool and the described stage clip.
The achieved beneficial effect of the present invention is: when blast occurs, no matter be malleation shock wave or negative pressure shock wave thereupon, the present invention all can protect simultaneously to building and inner facility, but and the impact intensity of wave carry out record.
Description of drawings
Fig. 1 is that shock wave shows brokenly ring power intention.
Fig. 2 is the normal lower prior art view of ventilating.
Fig. 3 is phase I prior art view during the malleation shock wave.
Prior art view when Fig. 4 is second stage negative pressure shock wave.
Fig. 5 is the present invention's schematic diagram in normal ventilation situation.
Fig. 6 is the schematic diagram of the present invention under malleation is impacted.
Fig. 7 is the schematic diagram of the present invention under negative pressure is impacted.
Fig. 8 is structural representation of the present invention.
Fig. 9 is C part enlarged diagram among Fig. 8.
Figure 10 is valve body 2 schematic diagrames of the present invention.
Figure 11 is the schematic perspective view of valve body 2 of the present invention.
Figure 12 is local enlarged diagram among Fig. 5 of the present invention.
Figure 13 is the schematic diagram of the present invention when being provided with shock wave peak records device.
Figure 14 is shock wave peak records device schematic diagram of the present invention.
Figure 15 is Figure 14 A-A generalized section of the present invention.
Among the figure:
1 framework,
2 valve bodies,
21 holes, 22 protecgulums, 23 bonnets, 24 Liang Jia, 25 beam second, 26a1 baffle plate, 26a2 baffle plate, 26c1 baffle plate, 26c2 baffle plate, 26c3 baffle plate, 26c4 baffle plate, 26b1 baffle plate, 26b2 baffle plate;
3 stage clips,
4 axles,
5 spools,
51 through holes,
6 bolts,
7 pads,
The width in H hole 21,
Distance between Wa1 baffle plate 26a1 and the baffle plate 26c1, the distance between Wa2 baffle plate 26c1 and the baffle plate 26c3,
Distance between Wa3 baffle plate 26c3 and the baffle plate 26a2, the distance between Wb1 baffle plate 26b1 and the baffle plate 26c2,
Distance between Wb2 baffle plate 26c2 and the baffle plate 26c4, the distance between Wb3 baffle plate 26c4 and the baffle plate 26b2,
8 vent passages,
9 shock wave peak records devices,
901 loam cakes, 902 lower covers, 903 upper racks, 904 times tooth bars, 905 spring B, 906 spring A, 907 axle A, 908 lid holes, 909 installing holes, 914 teeth groove.
The specific embodiment
Beneficial effect in order more properly to describe the present invention and to bring is described further the present invention below in conjunction with accompanying drawing, but protection scope of the present invention is not limited to the content that the specific embodiment is explained.
In conjunction with Fig. 8, Fig. 9, Figure 10, Figure 11, Figure 12 as can be known,
Bilateral shock wave resistance ventilation valve comprises the compositions such as framework 1, valve body 2, stage clip 3, axle 4, spool 5, pad 7.
Valve body 2: are connected respectively beam first 24 and the Liang Yi 25 that connects with bonnet by tandem protecgulum 22 and form the valve body framework, valve body 2 is hollow out.Its mesopore 21 connects protecgulum 22 and bonnet 23.
Baffle plate is fixed on the valve body framework.Baffle plate comprises right baffle-plate and right baffle plate.Right baffle-plate comprises baffle plate 26a1 and the baffle plate 26a2 of apportion upper/lower terminal; And baffle plate 26c1 and baffle plate 26c3 between adjacent two holes 21, wherein baffle plate 26c1 and baffle plate 26c3 are U-shaped; And baffle plate 26c1 and baffle plate 26c3 are between baffle plate 26a1 and baffle plate 26a2.
Right baffle plate comprises baffle plate 26b1 and the 26b2 of apportion upper/lower terminal, and the baffle plate 26c2 between adjacent two holes and baffle plate 26c4, and wherein baffle plate 26c2 and baffle plate 26c4 are U-shaped.And baffle plate 26c2 and baffle plate 26c4 are between baffle plate 26b1 and baffle plate 26b2.
Baffle plate 26a1 and baffle plate 26b1, baffle plate 26c1 and baffle plate 26c2, baffle plate 26c3 and baffle plate 26c4, baffle plate 26a2 and baffle plate 26b2 are respectively in the both sides of hole 21 longitudinal centre lines.
Distance W a1 between baffle plate 26a1 and the baffle plate 26c1 is less than the width H in hole 21.Distance W b1 between baffle plate 26b1 and the baffle plate 26c2 is less than the width H in hole 21.And distance W a1 is identical with distance W b1.
Distance W a2 between baffle plate 26c1 and the baffle plate 26c3 is less than the width H in hole 21.Distance W b2 between baffle plate 26c2 and the baffle plate 26c4 is less than the width H in hole 21.And distance W a2 is identical with distance W b2.
Distance W a3 between baffle plate 26a2 and the baffle plate 26c3 is less than the width H in hole 21.Distance W b3 between baffle plate 26b2 and the baffle plate 26c4 is less than the width H in hole 21.And distance W a3 is identical with distance W b3.
Spool 5 is tubulose, and spool 5 is provided with the through hole 51 of a perforation both sides tube wall.Spool 5 can be rectangular tube, square tube, pipe etc., and the outline of the shape in hole 21 and spool 5 is complementary, and spool 5 is through in the hole 21 and can the 21 interior translations in the hole.Under the normal ventilation condition, when the active force of spool 5 by resetting means was in the pressure balance district, middle part in hole 21, spool 5 did not contact with right baffle plate with right baffle-plate, the inside and outside both sides of body of wall air by passage 8 ventilate, convection current.
Formed by the gap between baffle plate 26a1, baffle plate 26b1, baffle plate 26c1, baffle plate 26c2, baffle plate 26c3, baffle plate 26c4, baffle plate 26a2, baffle plate 26b2 and hole 21 and the spool 5 by passage 8.
Between stage clip 3 and spool 5, be provided with pad 7.Pad 7 plays the effect of sealing.
Under different situations, the operation principle of bilateral shock wave resistance ventilation valve is as follows:
Resetting means connects respectively valve body 2 and spool 5, under the normal ventilation condition, spool 5 is in the middle part (pressure balance district) in hole 21 by the effect of resetting means, when explosion wave dash valve 5, the spool 5 stressed setting values that surpass resetting means in shock wave territory, spool 5 is a side shifting of 21 to the hole, until against right baffle-plate or right baffle plate.
Such as Fig. 5, Fig. 8, shown in Figure 12: under the normal ventilation condition, bilateral shock wave resistance ventilation valve is in the pars intermedia (pressure balance district) in hole 21 by the active force of stage clip 3; There is the space between baffle plate 26a1 and hole 21 and the spool 5, there is the space between baffle plate 26b1 and hole 21 and the spool 5, there is the gap between baffle plate 26c1 and hole 21 and the spool 5, there is the gap between baffle plate 26c2 and hole 21 and the spool 5, there is the gap between baffle plate 26c3 and hole 21 and the spool 5, there is the gap between baffle plate 26c4 and hole 21 and the spool 5, there is the space between baffle plate 26a2 and hole 21 and the spool 5, there is the space between baffle plate 26b2 and hole 21 and the spool 5, air flows between above-mentioned space, forms vent passages 8; Interior of building and extraneous air carry out ventilation by forced draft by vent passages 8, can air intake or outwards air draft.
As shown in Figure 6: when explosion wave impacts spool 5 in the export-oriented building, pressure such as shock wave territory spool 5 surpasses setting value, spool 5 will move to the right, reach the setting close value such as shock wave in the pressure of spool 5, spool 5 will be simultaneously closely against baffle plate 26b1, baffle plate 26c2, baffle plate 26c4 and baffle plate 26b2, thereby close vent passages 8, namely by having closed the gap between baffle plate 26b1 and hole 21 and the spool 5, space between baffle plate 26c2 and hole 21 and the spool 5, space between baffle plate 26c4 and hole 21 and the spool 5, gap between baffle plate 26b2 and hole 21 and the spool 5, intercepted shock wave, made the building inner air and outer air can not form convection current.
As shown in Figure 7: when explosion wave from interior when outside building, impacting spool 5, namely when explosion wave transfers negative pressure to from malleation, act on the setting value of spool 5 such as building pressure, spool 5 will move to the left, reach the setting close value such as shock wave in the pressure of spool 5, spool 5 will be close to baffle plate 26a1 simultaneously, baffle plate 26c1, baffle plate 26c3, baffle plate 26a2, namely closed the space between baffle plate 26a1 and hole 21 and the spool 5, space between baffle plate 26c1 and hole 21 and the spool 5, space between baffle plate 26c3 and hole 21 and the spool 5, space between baffle plate 26a2 and hole 21 and the spool 5, thereby close vent passages 8, intercept shock wave, make the building inner air and outer air can not form convection current.
In conjunction with Figure 13,14 and 15 as can be known: framework 1 is provided with screwed hole, lower the covering of shock wave peak records device 9 is provided with installing hole 909, bolt is through at installing hole 909 simultaneously and framework 1 is provided with screwed hole, shock wave peak records device 9 is fixed on the framework 1.
Shock wave peak records device 9 comprises lower cover 902, upper rack 903, axle A907, spring A905, spring B 906 and lower tooth bar 904; Spring A906 places on the lower cover 902, and lower tooth bar 904 places on the spring A906; Upper rack 903 and spring B are through on the described axle A907, and axle A907 two ends are fixing by nut and lower cover 902, and spring B 905 two ends butt lower cover 902 and upper racks 903; Upper rack 903 places on the lower tooth bar 904.
When shock wave impacted by covering hole 908, upper rack 903 can press tooth bar 904 to be moved to the left, and when shock wave disappeared, upper rack 903 descended tooth bar 904 to form displacement relatively, and card is to a certain teeth groove 914 places.Record shock wave peak value, teeth groove 914 numbers that only need numerical digit to move past, teeth groove 914 numbers are equivalent to the rank of shock wave.
Back out bolt and nut, loosen loam cake 901, upper rack 903 is returned to initial position can again carries out record.
Claims (9)
1. bilateral shock wave resistance ventilation valve comprises valve body and spool, and valve body consists of the valve body framework by protecgulum, bonnet, Liang Jia and Liang Yi, it is characterized in that, described valve body is provided with the hole, and described hole connects protecgulum and bonnet;
Described spool places in the described hole and can translation in described hole,
Also comprise resetting means, described resetting means connects respectively described valve body and described spool,
Under the normal ventilation condition, described spool is in the middle part in described hole by the active force of described resetting means, and the air of described bilateral shock wave resistance ventilation valve both sides can be by the vent passages convection current,
When the described spool of blast impulse wave impact, the stressed setting value that surpasses described resetting means of the described spool in shock wave territory, described spool is to a side shifting in described hole, until close vent passages.
2. bilateral shock wave resistance ventilation valve according to claim 1 is characterized in that, described resetting means is stage clip, and described stage clip is arranged at the both sides of described spool, and described spool is connected with described valve body by described stage clip.
3. bilateral shock wave resistance ventilation valve according to claim 2 is characterized in that, also comprise axle, described stage clip is through on the axle, and described spool is provided with through hole, and described axle passes described through hole and is connected with valve body.
4. according to claim 1 to 3 each described bilateral shock wave resistance ventilation valves, it is characterized in that, described valve body also comprises right baffle-plate and the right baffle plate that is respectively in longitudinal centre line both sides, described hole, and described right baffle-plate and described right baffle plate are positioned at the valve body framework and are fixed on the valve body framework.
5. according to claim 1 to 3 each described bilateral shock wave resistance ventilation valves, it is characterized in that, also comprise framework, described valve body is fixed on the described framework, and described framework is used for fixing with building masonry wall.
6. according to claim 1 to 3 each described bilateral shock wave resistance ventilation valves, it is characterized in that, also comprise pad, described pad is arranged between described spool and the described stage clip.
7. bilateral shock wave resistance ventilation valve according to claim 5 is characterized in that, also is provided with shock wave peak records device, and described shock wave peak records device is fixed on the described framework.
8. bilateral shock wave resistance ventilation valve according to claim 7 is characterized in that, described shock wave peak records device comprises lower cover, upper rack, axle A, spring A, spring B and lower tooth bar; Described spring A places and covers under described, and described lower tooth bar places on the described spring A; Described upper rack and described spring B are through on the described axle A, and described axle A two ends and described lower cover are fixed, and the described lower cover of described spring B two ends butt and described upper rack; Described upper rack places on the described lower tooth bar.
9. bilateral shock wave resistance ventilation valve according to claim 8 is characterized in that, also is provided with loam cake, and described loam cake is covered on and covers and detachably be fixedly connected with described lower cover under described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210480899.2A CN102927669B (en) | 2012-11-23 | 2012-11-23 | Bilateral shock-wave resistant air vent valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210480899.2A CN102927669B (en) | 2012-11-23 | 2012-11-23 | Bilateral shock-wave resistant air vent valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102927669A true CN102927669A (en) | 2013-02-13 |
| CN102927669B CN102927669B (en) | 2015-05-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210480899.2A Active CN102927669B (en) | 2012-11-23 | 2012-11-23 | Bilateral shock-wave resistant air vent valve |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105370945A (en) * | 2015-11-06 | 2016-03-02 | 江苏爵格工业设备有限公司 | Impact wave resisting valve |
| CN108344142A (en) * | 2018-01-23 | 2018-07-31 | 浙江上风高科专风实业有限公司 | A kind of sector structure shock-wave resistant air vent valve |
| CN113027796A (en) * | 2021-04-26 | 2021-06-25 | 江苏赛夫特防爆电气有限公司 | Large-diameter explosion-proof type axial flow fan for ship |
| CN114226853A (en) * | 2021-12-16 | 2022-03-25 | 浙江上风高科专风实业股份有限公司 | Double-row valve shaft shock wave resistant valve and machining equipment thereof |
| CN117552701A (en) * | 2023-11-10 | 2024-02-13 | 常州华东人防设备有限公司 | Bidirectional wave-absorbing explosion-proof valve |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB847283A (en) * | 1957-12-11 | 1960-09-07 | English Electric Co Ltd | Improvements in and relating to relief valves |
| GB2203232B (en) * | 1986-11-13 | 1991-01-16 | Colt Int Ltd | Improvements relating to ventilators |
| CN201013994Y (en) * | 2007-03-13 | 2008-01-30 | 辽宁良工阀门厂 | Pressure relief voltage stabilizer |
| KR101102451B1 (en) * | 2009-04-09 | 2012-01-05 | (주)인디고존 | Explosion-proof Valve |
| CN202992294U (en) * | 2012-11-23 | 2013-06-12 | 无锡斐冠工业设备有限公司 | Double-side shock wave resistant vent valve |
-
2012
- 2012-11-23 CN CN201210480899.2A patent/CN102927669B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB847283A (en) * | 1957-12-11 | 1960-09-07 | English Electric Co Ltd | Improvements in and relating to relief valves |
| GB2203232B (en) * | 1986-11-13 | 1991-01-16 | Colt Int Ltd | Improvements relating to ventilators |
| CN201013994Y (en) * | 2007-03-13 | 2008-01-30 | 辽宁良工阀门厂 | Pressure relief voltage stabilizer |
| KR101102451B1 (en) * | 2009-04-09 | 2012-01-05 | (주)인디고존 | Explosion-proof Valve |
| CN202992294U (en) * | 2012-11-23 | 2013-06-12 | 无锡斐冠工业设备有限公司 | Double-side shock wave resistant vent valve |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105370945A (en) * | 2015-11-06 | 2016-03-02 | 江苏爵格工业设备有限公司 | Impact wave resisting valve |
| CN108344142A (en) * | 2018-01-23 | 2018-07-31 | 浙江上风高科专风实业有限公司 | A kind of sector structure shock-wave resistant air vent valve |
| CN113027796A (en) * | 2021-04-26 | 2021-06-25 | 江苏赛夫特防爆电气有限公司 | Large-diameter explosion-proof type axial flow fan for ship |
| CN114226853A (en) * | 2021-12-16 | 2022-03-25 | 浙江上风高科专风实业股份有限公司 | Double-row valve shaft shock wave resistant valve and machining equipment thereof |
| CN117552701A (en) * | 2023-11-10 | 2024-02-13 | 常州华东人防设备有限公司 | Bidirectional wave-absorbing explosion-proof valve |
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| CN102927669B (en) | 2015-05-20 |
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