CN102692157A - Pressure equalizing device of fixed spraying systems - Google Patents
Pressure equalizing device of fixed spraying systems Download PDFInfo
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- CN102692157A CN102692157A CN2012102168328A CN201210216832A CN102692157A CN 102692157 A CN102692157 A CN 102692157A CN 2012102168328 A CN2012102168328 A CN 2012102168328A CN 201210216832 A CN201210216832 A CN 201210216832A CN 102692157 A CN102692157 A CN 102692157A
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- conical shell
- pressure
- switch
- shower nozzle
- regulating spring
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Abstract
The invention relates to a pressure equalizing device of fixed spraying systems, and the device comprises a conical shell, a float switch, a regulating spring, a nozzle and a bracket. The nozzle and a water inlet pipe are connected by virtue of the conical shell; the regulating spring is arranged at the bracket which is positioned at the bottom of the inner side of the conical shell; the float switch is connected with the regulating spring and can slide back and forth along a guide rail which is fixed between the top in the conical shell and the bracket at the bottom in the conical shell; in order to reduce the incoming flow impact loss, the upper tip part of the float switch is arc-shaped. By adopting the conical shell, the float switch and the regulating spring of different sizes, the device can be matched with the nozzles of various fixed spraying systems for use so as to uniformize the pressure and speed of the inlet of each nozzle. When the pressure and speed of the nozzle inlets are the same, the water sprayed by the nozzle can be the same in flow and spray radius so as to achieve the aim of equalizing the water distribution.
Description
Technical field
The present invention relates to fixedly sprinkling system of a kind of cooling tower, the fixedly spray system of the shared same water inlet pipe of especially a kind of a plurality of shower nozzles.
Background technology
Cooling tower generally can according to working medium whether directly ingress of air be divided into open type cooling tower and closed cooling tower; But no matter Kai Ta still closes tower; A requisite link is to be spread across cooling water or circulated sprinkling water in the tower equably in the heat transfer process; Let water fully contact, thereby utilize evaporation of water that heat is taken away with air.
Now spray system has rotary spray system and fixing two kinds of spray systems usually on the market.Two big systems respectively have superiority, and are generally used for difform cooling tower, but no matter use which kind of spray system, the most important thing is to guarantee that spray system can be with the water sprinkling evenly.For the rotary spray system, generally use turning spurt water device, its principle is intake in the middle of being; Water distributor around in spraying layer, getting into then; At this moment, as long as the size of water jet is controlled well, can reach the purpose of even sprinkling according to hydromechanical universal law; And it is not just so simple for stationary nozzle.
Usually, stationary nozzle is a lot of the shared same water inlet pipes of shower nozzle, because the influence of factors such as on-way resistance causes the pressure of each shower nozzle porch and speed all to be not quite similar, cause sprinkling inhomogeneous through regular meeting, even the shower nozzle that has sprays not water outlet.
Summary of the invention
In order to solve the fixedly uniform technical problem of sprinkling of spray system of many shower nozzles; The present invention provides a kind of fixedly spray system pressure-equalizing device; The supporting use of shower nozzle of this device and various fixedly spray systems; Pressure and speed to regulate each shower nozzle import are consistent, thereby reach the purpose of uniform water distribution.
For realizing above-mentioned purpose; Technical scheme of the present invention is: a kind of fixedly spray system pressure-equalizing device; Comprise conical shell, switch, regulating spring, shower nozzle, support, be characterized in: be connected through conical shell between shower nozzle and the water inlet pipe, be positioned on the support of conical shell inside bottom regulating spring is housed; Be connected with switch above the regulating spring, and switch can slidably reciprocate along the guide rail between the support that is fixed on conical shell inner top and bottom.For reducing the incoming flow impact loss, switch upper end head is circular arc.
The decrement Δ x of regulating spring and the pressure P of shower nozzle porch relation are:
The invention has the beneficial effects as follows:
Conical shell, switch and the regulating springs of the present invention through different sizes can with the supporting use of the shower nozzle of various fixedly spray systems; Pressure and speed to regulate each shower nozzle import are consistent; Pressure and speed one timing when the shower nozzle import; The water that shower nozzle sprayed just can be consistent with spraying on the radius at flow, therefore can reach the purpose of uniform water distribution.
Description of drawings
Fig. 1 is a structure cutaway view of the present invention;
Fig. 2 is the left cutaway view of Fig. 1.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described further.
Like Fig. 1, shown in 2, fixedly spray system pressure-equalizing device of the present invention comprises conical shell 4, switch 3, regulating spring 5, shower nozzle 6, support 7 etc.
Be connected through conical shell 4 between shower nozzle 6 and the water inlet pipe 1; Be positioned on the support 7 of conical shell 4 inside bottom regulating spring 5 is housed; Be connected with switch 3 above the regulating spring 5, and switch can slidably reciprocate along the guide rail 2 on 7 on the support that is fixed on conical shell 4 inner tops and bottom.For reducing the incoming flow impact loss, switch 3 upper end heads are circular arc.
The present invention adopts the method for making overall plans and coordinate variation relation between elastic force and the throttling differential water pressures, and the inlet pressure that can adjust each shower nozzle in the trickle pipe network within the specific limits reaches unanimity, and then reaches the purpose of water distribution uniformity.
The concrete course of work is following: shower water gets into pressure-equalizing device by water inlet pipe 1, rushes at the switch 3 that has dome, under the effect of shower water; Switch moves downward along the guide rail 2 on the support 7 that is fixed on the pressure-equalizing device import and export, compressing regulating spring 5, and regulating spring 5 compressions increase elastic force; Runner dwindles chock pressure difference is increased simultaneously; Stop switch 3 to move downward, under the acting in conjunction of elastic force and water pressure, switch 3 finally reaches balance.At this moment, the runner that shower water is formed along switch 3 and conical shell 4 flows through, and gets into shower nozzle 6, and final the sprinkling come.In whole process, when incoming-flow pressure changed, spring can be regulated through the variation of elastic force automatically, and brings the variation of runner, finally made the pressure of device outlet (being the shower nozzle import) keep constant, thereby reached the purpose of water distribution uniformity.
Pressure-equalizing device of the present invention need be installed between water distributor and the shower nozzle can play regulating action, and its design principle introduction is following: shower water is with speed V
0(m/s) and pressure P
0(Pa) get into pressure-equalizing device from water distributor, impact switch 3 and make regulating spring 5 compress, regulating spring 5 decrements are different, and the switching amount of switch 3 changes immediately, thereby the pressure that guarantees the pressure-equalizing device outlet is constant.
If when switch 3 and water inlet pipe 1 level; Regulating spring 5 is former length; Can get shower water applied energy law of conservation: the pressure potential of the preceding shower water of entering pressure-equalizing device and its gravitional force and kinetic energy sum equal pressure potential, kinetic energy and the pressure-equalizing device energy loss sum after elastic potential energy of the spring and the shower water outflow, that is:
P
0N+?Ng+1/2ρNV
0 2=1/2kΔx
2+PN+1/2ρNV
2+ΔE(Δx)
In the formula: N---the volume of contained shower water in the pressure-equalizing device, unit: m
3
G---acceleration of gravity, unit: m/s
2
The density of ρ---shower water, unit: kg/m
3
The coefficient of elasticity of k---spring, unit: N/m;
The decrement of Δ x---spring, unit: m;
P---the pressure of shower nozzle porch, unit: Pa;
V---the speed of shower nozzle porch, unit: m/s;
p
0---conical shell porch pressure, unit: Pa;
V
0---the conical shell porch speed, unit: m/s;
H---conical shell height, unit: mm;
Big mouthful of diameter of D---conical shell, unit: mm;
D---switch diameter, unit: mm;
A---switch height, unit: mm;
H---the distance of switch bottom to conical shell bottom surface, unit: mm.
Δ E (Δ x)---pressure-equalizing device energy loss function comprises friction loss, restriction loss and reduces loss.This tittle also can be confirmed after spring elongation Δ x confirms, therefore gets the functional relation that energy consumption is Δ x, unit: J.
According to data shown in Figure 1, abbreviation obtains:
Thus it is clear that, only need choose suitable regulating spring 5, for the shower nozzle 6 of different size, all just like drawing a conclusion: as Δ x and P
0During respective change, can keep P constant basically.
Comprehensive above analysis can be found out, wants to adjust mouth pressure, and key is coupling and the coordination between elastic force and the variation of throttling differential water pressures.This device is independent of outside water distributor and the shower nozzle, freely matees according to different tube diameters and all desirable corresponding specification of shower nozzle diameter.Therefore this device can be used for any one stationary nozzle, and the inlet pressure that can adjust each shower nozzle in the trickle pipe network within the specific limits reaches unanimity, and then reaches the purpose of water distribution uniformity.
Claims (3)
1. fixing spray system pressure-equalizing device; Comprise conical shell (4), switch (3), regulating spring (5); Shower nozzle (6); Support (7) is characterized in that: be connected through conical shell (4) between said shower nozzle (6) and the water inlet pipe (1), be positioned on the support (7) of conical shell (4) inside bottom regulating spring (5) is housed; Be connected with switch (3) above the regulating spring (5), and switch (3) can slidably reciprocate along the guide rail (2) between the support that is fixed on the conical shell top and bottom (7).
2. fixedly spray system pressure-equalizing device according to claim 1 is characterized in that: said switch (3) upper end head is circular arc.
3. fixedly spray system pressure-equalizing device according to claim 1 is characterized in that: said regulating spring (5), and the pressure P relation of its decrement Δ x and shower nozzle (6) porch is:
As Δ x and P
0During respective change, keep P constant, wherein: g is an acceleration of gravity, and ρ is the density of shower water, and k is the coefficient of elasticity of spring, and Δ x is the decrement of spring, and P is the pressure of shower nozzle porch, and V is the speed of shower nozzle porch, P
0Be conical shell porch pressure, V
0For the conical shell porch speed, Δ E (Δ x) is a pressure-equalizing device energy loss function, H is the conical shell height; D is big mouthful of diameter of conical shell; D is the switch diameter, and a is the switch height, and h is the distance of switch bottom to conical shell bottom surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102168328A CN102692157A (en) | 2012-06-28 | 2012-06-28 | Pressure equalizing device of fixed spraying systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102168328A CN102692157A (en) | 2012-06-28 | 2012-06-28 | Pressure equalizing device of fixed spraying systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102692157A true CN102692157A (en) | 2012-09-26 |
Family
ID=46857773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102168328A Pending CN102692157A (en) | 2012-06-28 | 2012-06-28 | Pressure equalizing device of fixed spraying systems |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102692157A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109458868A (en) * | 2018-12-13 | 2019-03-12 | 新菱空调(佛冈)有限公司 | The rectangular spray head of countercurrent tower variable-flow |
| CN109498929A (en) * | 2018-12-10 | 2019-03-22 | 李从宾 | A kind of department of anesthesia's spraying device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2043895U (en) * | 1988-12-29 | 1989-09-06 | 李保民 | Adjustable dished spray head |
| CN1388424A (en) * | 2001-05-25 | 2003-01-01 | 株式会社省电舍 | Constant flow device |
| CN1408481A (en) * | 2001-09-12 | 2003-04-09 | 株式会社池内 | Nozzle |
| CN2629830Y (en) * | 2003-06-06 | 2004-08-04 | 中国农业大学 | Pressure type variable spray head body |
| JP2006125023A (en) * | 2004-10-28 | 2006-05-18 | Taiheiyo Material Kk | Spray nozzle with pressure valve |
| CN1932380A (en) * | 2006-01-23 | 2007-03-21 | 中国人民解放军国防科学技术大学 | Back pressure adaptive constant-flow nozzle |
| CN102039229A (en) * | 2011-01-27 | 2011-05-04 | 中国农业科学院农田灌溉研究所 | Steady flow nozzle |
-
2012
- 2012-06-28 CN CN2012102168328A patent/CN102692157A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2043895U (en) * | 1988-12-29 | 1989-09-06 | 李保民 | Adjustable dished spray head |
| CN1388424A (en) * | 2001-05-25 | 2003-01-01 | 株式会社省电舍 | Constant flow device |
| CN1408481A (en) * | 2001-09-12 | 2003-04-09 | 株式会社池内 | Nozzle |
| CN2629830Y (en) * | 2003-06-06 | 2004-08-04 | 中国农业大学 | Pressure type variable spray head body |
| JP2006125023A (en) * | 2004-10-28 | 2006-05-18 | Taiheiyo Material Kk | Spray nozzle with pressure valve |
| CN1932380A (en) * | 2006-01-23 | 2007-03-21 | 中国人民解放军国防科学技术大学 | Back pressure adaptive constant-flow nozzle |
| CN102039229A (en) * | 2011-01-27 | 2011-05-04 | 中国农业科学院农田灌溉研究所 | Steady flow nozzle |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109498929A (en) * | 2018-12-10 | 2019-03-22 | 李从宾 | A kind of department of anesthesia's spraying device |
| CN109458868A (en) * | 2018-12-13 | 2019-03-12 | 新菱空调(佛冈)有限公司 | The rectangular spray head of countercurrent tower variable-flow |
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Application publication date: 20120926 |