CN103411006B - Unitary air handling unit system air compartment pressure relief device - Google Patents
Unitary air handling unit system air compartment pressure relief device Download PDFInfo
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- CN103411006B CN103411006B CN201310323224.1A CN201310323224A CN103411006B CN 103411006 B CN103411006 B CN 103411006B CN 201310323224 A CN201310323224 A CN 201310323224A CN 103411006 B CN103411006 B CN 103411006B
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Abstract
The invention discloses a kind of unitary air handling unit system air compartment pressure relief device, between unitary air handling unit plemum and negative pressure chamber, vertical closure plate is provided with Decompression valves, and described Decompression valves comprises: the valve gap being provided with a guide rod in the middle part of in the of; Be provided with the valve seat of a conduit in the middle part of in the of one, the position that valve seat is positioned at suitable patterns is provided with relief hole; A pulley be fixed on the support on valve seat; One gravity block; One rope; Described valve seat is installed on described vertical closure plate relief hole position, described valve gap is positioned at described negative pressure chamber side and guide rod on valve gap pierces into the conduit on described valve seat, the pulley assembly that described valve seat is installed and described gravity block are positioned at plemum, described rope one end is connected to valve gap guide rod tail end, the other end is walked around described pulley and is connected on described gravity block, and gravity block freely dangles.This device can avoid unitary air handling unit system air compartment not superpressure, and structure is simple, assembling and easy to adjust, reliable.
Description
Technical field
The present invention relates to the air compartment safety protection device of unitary air handling unit; avoid the decompression protection device of air compartment superpressure specifically, when the positive and negative pressure chamber superpressure of unitary air handling unit, the pressure release of plemum to negative pressure chamber can be realized; with balance pressure to normal range (NR), assurance device security of operation.
Background technique
The unitary air handling unit of HVAC refrigeration industry, the cold that cooling machine set produces is transported to associated room with the form of cold wind by airduct by blower fan, closure plate both sides are divided into two air compartments by closure plate by fan outlet place, i.e. plemum and negative pressure chamber, blower fan and drip disc are arranged on negative pressure chamber, and plemum is provided with diffuser and filter.During owing to normally working, plemum and negative pressure chamber's pressure and external atmospheric pressure difference are not very large, and it is lower to reduce costs that pressure is born in general air compartment wall design.In use having plemum due to reasons such as outlet valve are malfunctioning causes plemum superpressure, and overpressure not only can cause plemum to be out of shape, damage, if blower fan does not stop the burn-down of electric motor that yet can cause blower fan because blower fan load is excessive simultaneously.In addition, during negative pressure chamber's hypotony, negative pressure chamber and negative pressure chamber's external environmemt pressure difference excessive, the distortion of the locular wall of same Hui Shi negative pressure chamber, to damage.But current the sector does not have effective measures to ensure positive and negative pressure chamber not superpressure (plemum superelevation and negative pressure chamber ultralow).
Decompression valves is that one realizes self-relieving device when pressure superelevation, and Decompression valves mainly contains two large classes, spring and Lever type, and spring leans on the active force of spring to be pressed on valve seat by flap to realize, and Lever type is the active force realization by lever and weight.This Decompression valves has following shortcoming: (1) is generally all pipe type structure, complex structure, and volume and weight is large, and major part requires vertical installation.(2) owing to adopting pipeline configuration, by restrictions such as processing, flow area is little.And the larger required pressure of its pressure release aperture is also larger, therefore pressure release is slow.(3) that vent pressure is accurately regulated is more difficult for its structural type.The elastic force of such as spring not easily accurately adjusts to desirable value.And Lever type pressure release, pressure depends on weight weight and flap weight.User is the unclear weight being arranged on tubular type valve seat internal valve lobe usually, thus oneself change weight weight becomes difficulty with accurate adjustment vent pressure.(4) because flap is mounted in valve seat, keep in repair more difficult, also easily block.(5) due to complex structure, poor reliability, easily malfunctioning.(5) cracking pressure of existing pressurized container Decompression valves is high, and the pressure of air-conditioning system does not reach the working pressure of existing pressurized container Decompression valves, makes it not be applied to air-conditioning system.This is also unitary air handling unit air compartment not one of reason adopting Decompression valves in prior art.
Summary of the invention
The object of the present invention is to provide a kind of unitary air handling unit security of system protective gear, positive and negative pressure chamber superpressure can be avoided, improve the Security of system, and vent pressure value easily accurately regulates, to meet the lower requirement of air compartment pressure release working pressure.
In order to realize object of the present invention, adopt following technological scheme:
A kind of unitary air handling unit system air compartment pressure relief device, between unitary air handling unit plemum and negative pressure chamber, vertical closure plate is provided with Decompression valves, described Decompression valves comprises:
One valve gap, is provided with a guide rod in the middle part of valve gap, valve gap edge is sealing surface;
One board-like valve seat, is provided with a conduit in the middle part of valve seat, the position that valve seat is positioned at suitable patterns is provided with relief hole, and relief hole is outward annular sealing surface, forms sealing pair with valve bonnet seal face;
One pulley assembly, comprises a support be fixed on valve seat, support is provided with pulley; Pulley is positioned at beyond the conduit end face of described valve seat;
One gravity block;
One rope;
Described valve seat is installed on described vertical closure plate relief hole position, described valve gap is positioned at described negative pressure chamber side, and the guide rod on valve gap pierces in the conduit on described valve seat, the pulley assembly that described valve seat is installed and described gravity block are positioned at plemum, described rope one end is connected to valve gap guide rod tail end, the other end is walked around described pulley and is connected described gravity block, and gravity block freely dangles.
Described valve seat is one flat plate, and described relief hole is multiple, and arranging around dull and stereotyped middle part, is that gusset is with A/C between adjacent relief hole.Board-like valve seat not only structure is simply easy to be shaped by steel plate punch process, to reduce material consumption and processing cost, to be simultaneously also easily arranged on vertical closure plate by bolt.Simultaneously lightweight and center of gravity, at the center of plate, can not make thinner closure plate by torsional deformation when being arranged on vertical closure plate.What is more important, dull and stereotyped valve seat, compared with tubular type valve seat, can adopt larger diameter to increase Decompression valves circulation area, both be conducive to realizing quick pressure releasing, also can obtain larger opening force when valve both sides low voltage difference.
Described tube at one end is flange, and catheter outer surface arranges outside thread and mounting nuts, and the flat board that conduit clamps described formation valve seat by flange and nut makes conduit be fixed on valve seat.This mode compared with welding manner, parts interchangeability good and processing and assembly precision easily ensure, easy to assembly.
Described valve gap is a disk, and the web of disk is described sealing surface, and on web, cover has O-ring seal.This disc structure, compared with slab construction, can avoid conduit flange on the impact of valve gap, dull and stereotyped middle part poor flatness also can be avoided the impact of sealing effect, be conducive to adopting punch process valve seat.
Guide rod mounting hole is provided with, together with guide rod end to be fixed on through described valve gap top guide bar mounting hole and by the nut that is positioned at disk two sides with disk in the middle part of described disc type valve gap.
One piece of backing plate can be set between described disk outer side surface and this side nut, between disk inner side surface and this side nut, packing ring is set, to ensure that nut does not loosen, backing plate can avoid pulling force suffered by valve gap to concentrate on middle part simultaneously, reducing pressure by increasing valve gap lifting surface area, stressedly when avoiding valve gap to adopt thinner plate to make concentrating the distortion or damage that cause, valve gap integral thickness can be reduced thus, further reduction overall weight, strengthens interchangeability simultaneously.
Described guide rod tail end is provided with double nut to limit Decompression valves opening travel and to avoid valve gap to come off from valve seat.
Described support can be the floor of at least two block weldings on described valve seat, and floor tail end is welded with a fixed plate with holes for installing pulley and floor being connected as a single entity.Adopt floor mode compared with employing pipe mode, floor and valve seat weld locations can bear more high pulling torque, and the assembly manipulation of conduit upper cap nut is convenient in the space between floor, and be convenient to the assembly manipulation of tie rod end nut, and rope is fastened on guide rod.
Described gravity block is metal cylinder, and cylindrical end over glaze heart place is provided with draw ring by screw thread, and described rope is arranged on described draw ring.
Described guide rod tail end has radial direction through hole, and described rope is fastened on guide rod through this through hole, so that connect and change.
This unitary air handling unit system air compartment pressure relief device of the present invention, has following beneficial effect:
(1) by installing Decompression valves on the plemum of air compartment and the vertical closure plate of negative pressure chamber, when plemum pressure superelevation or negative pressure chamber's hypotony, capital causes positive and negative pressure chamber pressure reduction overrate, now Decompression valves is opened, the pressure air in plemum is made to be discharged to negative pressure chamber, the plemum avoiding plemum superpressure to bring damages or fan motor scaling loss, and avoids negative pressure chamber's hypotony.Plemum and negative pressure chamber's overpressure or too low problem can be solved with a Decompression valves simultaneously; Simultaneously with Decompression valves is set on plemum locular wall to environment exhaust or arrange Decompression valves environmental air to be introduced compared with negative pressure chamber on negative pressure chamber's locular wall, avoid the loss of cold (heat) energy, reach effects of energy conservation and environmental protection.And valve gap both sides pressure reduction is large, is easy to realize superpressure and opens.
(2) adopt gravity block as the power of valve closing, and only need a pulley and rope that vertical for gravity block gravity can be realized to be transformed into horizontal pull, not only structure is simple, and can ensure that required power is in the same size when any valve opening, valve opening can be made large, realize quick pressure releasing.And because plemum pressure is higher than ambient pressure environment, negative pressure chamber's pressure is lower than ambient pressure environment, and positive and negative pressure chamber pressure reduction is conducive to quick pressure releasing greatly.
(3) weight by changing gravity block can facilitate, accurately arrange the working pressure of Decompression valves, makes it have wider applicable pressure range.
(4) between valve gap and guide rod, between valve seat and conduit, all adopt nut structure to be assembled together, due to can separate machined and accurate Assembling again after processing, not only can ensure machining accuracy, and accumulating be convenient.And only can change single part during a certain parts damages, maintenance cost is low, and interchangeability is good.And for different valve gap diameter, can only join a kind of conduit and guide rod, be easy to realize standardized production.
Figure of description
Fig. 1 is the erection drawing of Decompression valves;
Fig. 2 is a kind of valve seat planes figure;
Fig. 3 is unitary air handling unit system wind pressure room pressure relief device figure of the present invention.
Embodiment
Below in conjunction with preferred embodiments and drawings, the invention will be further described, to help understanding content of the present invention.
Figure 3 shows that the plenum of unitary air handling unit, air compartment is separated into the plemum 100 in left side and the negative pressure chamber 200 on right side in figure by vertical closure plate 12.In negative pressure chamber 200, blower fan and drip disc etc. are installed, its effect be cool air that cooling machine set is produced by blower fan supercharging to realize conveying in unitary air handling unit system in each airduct.Diffuser and filter are installed, to carry out diffusing and purification to air in plemum 100.
As shown in Figure 1, a kind of unitary air handling unit system air compartment pressure relief device, the Decompression valves mounting hole between unitary air handling unit plemum and negative pressure chamber, vertical closure plate 12 offered is provided with Decompression valves.
Fig. 1 and Fig. 2 shows the structure of Decompression valves, and Decompression valves comprises:
One valve gap 11, is provided with a guide rod 5 in the middle part of valve gap 11, valve gap 11 edge is sealing surface, and cover has ring-shaped rubber seal ring;
One board-like valve seat 3, is provided with a conduit 4 in the middle part of valve seat 3, the position that valve seat 3 is positioned at suitable patterns is provided with relief hole 2 as shown in Figure 2, and relief hole 2 is outer is annular sealing surface, forms sealing pair with the sealing surface of valve gap 11;
One pulley assembly, comprises a support 1 be fixed on valve seat, support is provided with pulley 7; Pulley 7 is positioned at beyond conduit 4 and guide rod 5 end face, and the center of circle line of pulley groove and guide rod 5 shaft axis are on same straight line;
One cylindrical gravity block 9;
One rope;
Valve seat 3 is installed on vertical closure plate 12 relief hole position, valve gap 11 is positioned at unitary air handling unit and bears negative pressure chamber 200 side of room and the guide rod 5 on valve gap 11 pierces into the conduit 4 on valve seat, the pulley assembly that valve seat 3 is installed and gravity block 9 are positioned at plemum 100, rope one end is connected to valve gap guide rod 5 tail end, the other end is walked around pulley 7 and is connected on gravity block 9, and gravity block 9 is freely dangled.
As shown in Figure 2, valve seat 3 is one flat plate, and relief hole 2 is two half-lune holes arranged around dull and stereotyped middle part, is gusset 13 between two relief holes 2, in the middle part of suitable patterns, flat board.Flat valve type valve seat 3 is fixed on closure plate 12 by bolt, realizes the installation of whole Decompression valves.
Conduit 4 one end is flange, and conduit 4 outer surface arranges outside thread and mounting nuts, and conduit 4 forms the flat board of valve seat 3 by flange and nut clamping, and conduit 4 is fixed on valve seat 3.
Guide rod 5 tail end is provided with double nut, to limit valve gap maximum opening shown in Decompression valves opening travel to Fig. 1, and avoids valve gap 11 to come off from valve seat.
Valve gap 11 is a disk, and the web of disk is sealing surface, and on web, cover has O-ring seal (not shown).
Guide rod mounting hole is provided with, together with guide rod 5 end to be fixed on through valve gap 11 top guide bar mounting hole and by the nut that is positioned at disk two sides with disk in the middle part of disc type valve gap 11.
Arrange one piece of backing plate 10 between disk outer side surface and nut, backing plate 10 arranges packing ring between disk inner side surface and nut, particularly spring washer together with being bolted with valve gap 11.
Support 1 is the floors of two block weldings on valve seat 3, and floor adopts gusset to make, and the fixed plate 6 through the hole of rope is with in floor tail end welding one, for installing wheel shaft and the pedestal of pulley 7.
Gravity block 9 is metal cylinder, and cylindrical end over glaze heart place is provided with draw ring 8 by screw thread, and rope is arranged on draw ring 8, the gravity block of replaceable Different Weight.
No matter be that plemum 100 pressure exceedes design pressure, or negative pressure chamber 200 pressure is lower than setting pressure, the working pressure that plemum 100 and negative pressure chamber 200 pressure difference all can be caused to exceed Decompression valves design.Now under pressure difference effect, air makes valve gap 11 right side in Fig. 1 move to shown position to the gravity that the pressure that valve gap 11 produces overcomes gravity block 9, valve gap 11 is departed from the sealing pair of flat valve seat 3 seal, air in plemum 100 enters in negative pressure chamber 200, reduce plemum pressure, improve negative pressure chamber's pressure.When pressure difference gets back to design load, the pulling force that the gravity of gravity block 9 produces makes valve gap 11 be returned to sealing station.The effect of guide rod 5 and conduit 4 ensures that valve gap 11 can only do level of linearity translation.What this mounting type produced sealing force only has the gravity of gravity block and the gravity of rope hanging portion.During the employing nonmetallic material such as cotton cord, nylon rope, rope gravity can be ignored.And the gravity such as valve gap 11 and guide rod 5, nut can not produce direct effect power, therefore for the Decompression valves of different operating pressure, only need change the gravity block varied in weight and can realize setting.Easy to adjust and accurate.
Claims (10)
1. a unitary air handling unit system air compartment pressure relief device, is characterized in that: between unitary air handling unit plemum and negative pressure chamber, vertical closure plate is provided with Decompression valves, described Decompression valves comprises:
One valve gap, is provided with a guide rod in the middle part of valve gap, valve gap edge is sealing surface;
One board-like valve seat, is provided with a conduit in the middle part of valve seat, the position that valve seat is positioned at suitable patterns is provided with relief hole, and relief hole is outward that annular sealing surface and valve bonnet seal face form sealing pair;
One pulley assembly, comprises a support be fixed on valve seat, support is provided with pulley; Pulley is positioned at beyond the conduit end face of described valve seat;
One gravity block;
One rope;
Described valve seat is installed on described vertical closure plate relief hole position, described valve gap is positioned at described negative pressure chamber side and guide rod on valve gap pierces into the conduit on described valve seat, the pulley assembly that described valve seat is installed and described gravity block are positioned at plemum, described rope one end is connected to valve gap guide rod tail end, the other end is walked around described pulley and is connected described gravity block, and gravity block freely dangles.
2. unitary air handling unit system air compartment pressure relief device as claimed in claim 1, is characterized in that: described valve seat is one flat plate, and described relief hole is multiple and arranges around dull and stereotyped middle part, is gusset between adjacent relief hole.
3. unitary air handling unit system air compartment pressure relief device as claimed in claim 2, it is characterized in that: described tube at one end is flange, catheter outer surface arranges outside thread and mounting nuts, and the flat board that conduit clamps described formation valve seat by flange and nut makes conduit be fixed on valve seat.
4. unitary air handling unit system air compartment pressure relief device as claimed in claim 3, it is characterized in that: described valve gap is a disk, the web of disk is described sealing surface, and on web, cover has O-ring seal.
5. unitary air handling unit system air compartment pressure relief device as claimed in claim 4, it is characterized in that: in the middle part of described disc type valve gap, be provided with guide rod mounting hole, together with guide rod end to be fixed on through described valve gap top guide bar mounting hole and by the nut that is positioned at disk two sides with disk.
6. unitary air handling unit system air compartment pressure relief device as claimed in claim 5, is characterized in that: arrange one piece of backing plate between described disk outer side surface and this side nut, arranges packing ring between disk inner side surface and this side nut.
7., as the unitary air handling unit system air compartment pressure relief device as described in one of in claim 1-6, it is characterized in that: described guide rod tail end is provided with double nut.
8. as the unitary air handling unit system air compartment pressure relief device as described in one of in claim 1-6, it is characterized in that: described support is the floors of at least two block weldings on described valve seat, floor tail end is welded with a fixed plate with holes for installing pulley.
9., as the unitary air handling unit system air compartment pressure relief device as described in one of in claim 1-6, it is characterized in that: described gravity block is metal cylinder, cylindrical end over glaze heart place is provided with draw ring by screw thread, and described rope is arranged on described draw ring.
10., as the unitary air handling unit system air compartment pressure relief device as described in one of in claim 1-6, it is characterized in that: described guide rod tail end has radial direction through hole, described rope is fastened on guide rod through this through hole.
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| CN201310323224.1A CN103411006B (en) | 2013-07-29 | 2013-07-29 | Unitary air handling unit system air compartment pressure relief device |
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| CN201310323224.1A CN103411006B (en) | 2013-07-29 | 2013-07-29 | Unitary air handling unit system air compartment pressure relief device |
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| CN103411006A CN103411006A (en) | 2013-11-27 |
| CN103411006B true CN103411006B (en) | 2015-10-28 |
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| CN106481837B (en) * | 2016-12-02 | 2019-02-22 | 上海化工研究院有限公司 | A kind of gravity formula ball valve moment folding control device |
| CN114392982A (en) * | 2021-12-02 | 2022-04-26 | 上海建工四建集团有限公司 | Blowing-sucking integrated electric dust-free device |
| CN114433562A (en) * | 2021-12-02 | 2022-05-06 | 上海建工四建集团有限公司 | Blowing-sucking integrated electric closed dust removal construction method |
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| US3395568A (en) * | 1963-08-10 | 1968-08-06 | Lodige Alois | Arrangement for automatically closing energy passage systems, especially air passages |
| CN201836417U (en) * | 2010-11-05 | 2011-05-18 | 西华大学 | Ultrahigh pressure automatic exhaust and pressure relief valve |
| CN201884736U (en) * | 2010-11-18 | 2011-06-29 | 唐山贺祥集团有限公司 | Gas pressure relief device |
| CN102392908A (en) * | 2011-11-02 | 2012-03-28 | 浙江盾安阀门有限公司 | Non-return pressure reducing valve |
-
2013
- 2013-07-29 CN CN201310323224.1A patent/CN103411006B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3395568A (en) * | 1963-08-10 | 1968-08-06 | Lodige Alois | Arrangement for automatically closing energy passage systems, especially air passages |
| CN201836417U (en) * | 2010-11-05 | 2011-05-18 | 西华大学 | Ultrahigh pressure automatic exhaust and pressure relief valve |
| CN201884736U (en) * | 2010-11-18 | 2011-06-29 | 唐山贺祥集团有限公司 | Gas pressure relief device |
| CN102392908A (en) * | 2011-11-02 | 2012-03-28 | 浙江盾安阀门有限公司 | Non-return pressure reducing valve |
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Inventor after: Bao Feng Inventor after: Liu Hongyu Inventor after: Zhang Jian Inventor before: Bao Feng Inventor before: Liu Hongyu |