CN102505734B - Secondary constant-pressure water supply system of high-rise building - Google Patents
Secondary constant-pressure water supply system of high-rise building Download PDFInfo
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- CN102505734B CN102505734B CN 201110291601 CN201110291601A CN102505734B CN 102505734 B CN102505734 B CN 102505734B CN 201110291601 CN201110291601 CN 201110291601 CN 201110291601 A CN201110291601 A CN 201110291601A CN 102505734 B CN102505734 B CN 102505734B
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Abstract
The invention relates to a secondary constant-pressure water supply system of a high-rise building, which comprises a variable-frequency speed-regulating primary constant-pressure water supply device, a main pipe, constant-pressure water flow servo valves of a secondary constant-pressure water supply device and floor water branches. The variable-frequency speed-regulating primary constant-pressure water supply device is placed in a sectional manner according to the height the high-rise building, sections of the variable-frequency speed-regulating primary constant-pressure water supply device are serially connected via the main pipe, the main pipe is located at the center of the building and is arranged perpendicularly, the floor water branches are horizontally arranged from the main pipe to two sides of the building, the constant-pressure water flow servo valves are mounted at inlets of the floor water branches, secondary constant pressure is realized by the constant-pressure water flow servo valves, the problem that water supply pressures of the various floor water branches are inconsistent due to height change when in primary constant-pressure water supply is resolved, and watersupply quality is high. The secondary constant-pressure water supply system is simple in structure, does not increase control and management difficulty, is high in reliability and small in occupied space of the building, and does not increase running noise of equipment, and secondary pollution of running water is avoided.
Description
Technical field:
The present invention relates to the constant pressure water supply technical field, relate in particular to a kind of highrise building secondary constant pressure water supply system.
Background technology:
A large amount of high levels, super highrise building have appearred in the continuous expansion along with rapid economy development and city size.High rise building water supply generally adopts the way of supplying water of secondary pressurization, at present state-of-the-art is to adopt multistage relay constant pressure water supply system to realize second pressure water supply, the method of having avoided traditional employing water tank secondary to pressurize, the secondary pollution of the tap water that may cause and water tank take building space.
Multistage relay constant pressure water supply system, at first be building to be divided into low district (1～17 floor), three districts, middle district (18～35 floor) He Gao district (36～50 floor), and in the bottom in each district (1 floor, 18 floor, 36 floor) single-stage constant pressure water supply equipment is installed respectively, then three complete equipment cascades are constituted.The key of whole water system control is interlock and the interlock protection of respectively distinguishing between the supply equipment.In order to prevent that commentaries on classics takes place to do respectively to distinguish water pump, to the order from low district to the height district start successively when system starts, and must not start simultaneously; During normal the operation, when certain district's intake pressure deficiency is must earlier each the district's equipment more than this district be shut down successively according to order from high to low, and then make this district's equipment out of service; When needing to shut down because of maintenance, whole system also must shut down successively according to order Jiang Ge district equipment from high to low.
Multistage relay constant pressure water supply system, still there is the excessive defective of water pressure difference between same district bottom and high-rise user, and by further reducing the method that the subregion number of plies increases relay progression, reduce this water pressure difference, not only to significantly increase input, to make operation control more difficult and the reduction reliability simultaneously, and further increase the space that constant pressure water supply equipment occupies building, and further increase the operation noise of constant pressure water supply equipment.Therefore, overcome the excessive defective of water pressure difference between the user, need look for another way.
Summary of the invention:
The object of the present invention is to provide a kind of simple in structure, do not increase control and management difficulty, reliability height, can effectively reduce water pressure difference between each floor user, take that building space is little, the highrise building secondary constant pressure water supply system of not increase equipment operation noise, tap water non-secondary pollution.
The object of the present invention is achieved like this:
A kind of highrise building secondary constant pressure water supply system, comprise: constant pressure water supply equipment of frequency control, main, secondary constant pressure water supply equipment constant voltage discharge servo valve, floor water arm, constant pressure water supply equipment of frequency control is placed by the height subregion, connect by main, main is positioned at the center of building, be arranged vertically, floor water arm then by main to the both sides horizontal arrangement, in floor water arm entrance, constant voltage discharge servo valve is installed, constant voltage discharge servo valve, comprise: valve body, barrier film, the barrier film of horizontal positioned is divided into valve body with reference to pressure chamber and water flow sensing chamber two parts, with reference to having in the pressure chamber, venthole, spring, leading screw, slide block, the cross section of leading screw is circular hollow, last connecting rod is through wherein, the round slider that circular upright opening is arranged of horizontal positioned is placed in outside the leading screw, both are connected by the slideway that spirals of slide block endoporus and leading screw outer wall, the top of going up connecting rod in the leading screw of hollow is provided with venthole, the top of leading screw is provided with the cross gap that spanner is regulated in interim installation, on the barrier film of horizontal positioned, following two sides is coated with the corrosion resistant plate that area equates respectively, perpendicular to diaphragm plane, be positioned on the barrier film, on the following both sides, lower link connects together, pass with the perpendicular bisector of barrier film from the center of barrier film and to overlap, by last, the holding screw of lower link will cover barrier film on, the corrosion resistant plate on following two sides is pressed on the barrier film, the water flow sensing is provided with delivery port in the chamber, the bottom in water flow sensing chamber connects the water inlet choke valve, it is the water inlet throttle valve seat of level circle and the water inlet throttling valve core that circular cross section changes from small to big from top to bottom that the water inlet choke valve is provided with the cross-section of river, the water inlet throttling valve core is vertically passed the into circular cross-section of river of level of water throttle valve seat, overlap with the perpendicular bisector of the circular cross-section of river of level of water inlet throttle valve seat, the big end of water inlet throttling valve core cross section, be positioned at into water inlet one side of water throttle valve seat, the upstream face of water inlet throttling valve core is circular flat, the area of the following corrosion resistant plate that covers on the barrier film is far longer than the into upstream face of water throttling valve core, the top of water inlet throttling valve core is connected with lower link, the bottom of water inlet choke valve is circular intake tunnel, and intake tunnel is provided with three deflectors that are evenly arranged in circular intake tunnel inwall perpendicular to the circular cross-section of river.
The operating principle of highrise building secondary constant pressure water supply system is as follows:
In highrise building secondary constant pressure water supply system of the present invention, one time constant pressure water supply is same as the prior art, difference is to have adopted the constant voltage discharge servo valve of especial manufacture, and be installed in the entrance of floor water arm, carry out the secondary constant voltage by constant voltage with the discharge servo valve, eliminated constant pressure water supply makes each floor because of height change the inconsistent situation of water arm pressure of supply water.
Constant voltage is with the operating principle of discharge servo valve: because the area of the following corrosion resistant plate that covers on the barrier film is far longer than the upstream face of throttling valve core, generally, the pressure that this upstream face is accepted also is far smaller than the pressure that the following corrosion resistant plate that covers on the barrier film is accepted, and the compression that this upstream face produces can be ignored with reference to the active force of the spring in the pressure chamber.When the user stops water, be minimum value with discharge, the liquid in the water flow sensing chamber stops to flow, flowing pressure is zero, and hydrostatic pressure to be maximum value (equal discharge pressure H
Out), at this moment, acting on the pressure maximum on the following corrosion resistant plate that covers on the barrier film, the compression of generation (equals H with reference to the active force maximum of the spring in the pressure chamber
Out* A
p, A
pArea for the following corrosion resistant plate that covers on the barrier film), make the displacement maximum that water throttling valve core into makes progress (equal the maximum displacement s that water throttling valve core into makes progress
Max, mark is arranged in the accompanying drawing); After the user begins water, liquid in the water flow sensing chamber has also produced thereupon and has flowed, part hydrostatic pressure is converted into flowing pressure, the pressure that acts on the following corrosion resistant plate that covers on the barrier film is reduced, the compression that produces also reduces with reference to the active force of the spring in the pressure chamber thereupon, the elastic force of compressed spring obtains part and discharges, and making into, the water throttling valve core moves down from the displacement maximum that makes progress; The user is more big with discharge, the speed of the liquid flow in the water flow sensing chamber is just more big, the part that hydrostatic pressure is converted into flowing pressure is just more many, the pressure that acts on the following corrosion resistant plate that covers on the barrier film is just more few, the compression that produces is also more little with reference to the active force of the spring in the pressure chamber, it is just more many that the elastic force of compressed spring obtains discharging, and makes that into the water throttling valve core is just more big from the distance that the displacement maximum that makes progress moves down.If represent with mathematic(al) representation be exactly:
s＝f(Q)——1
That is, the displacement s of water inlet throttling valve core is the function that the user uses discharge Q.More particularly, the displacement s of water inlet throttling valve core and user use discharge Q negative correlation.
Because intake tunnel is connected with the one-level constant-voltage system, intake pressure H
InBe steady state value, constant voltage is to carry out the secondary constant voltage with the purpose of discharge servo valve, and delivery port is connected discharge pressure H with secondary watering equipment (user)
OutAlso be steady state value, the constant voltage pressure differential H of the rear and front end of discharge servo valve
In-H
OutAlso be steady state value, constant voltage satisfies relational expression with the discharge servo valve:
H
in-H
out＝S
uQ
2——2
In the formula, S
uBe the modulus of resistance of constant voltage with the discharge servo valve; Q was the volume flow of valve fluid, that is, the user uses discharge Q.Because constant voltage is crossed the size of water resistance with the discharge servo valve, depend primarily on the into size of water choke valve resistance, S
uCan regard the into modulus of resistance of water choke valve as.And the modulus of resistance S of water inlet choke valve
uBe the function of the area A of the cross-section of river of water choke valve into, that is:
S
u＝f(A)——3
More particularly, the modulus of resistance S of water inlet choke valve
uThe area A negative correlation of the cross-section of river with the water inlet choke valve.
And the area A of the cross-section of river of water inlet choke valve is the function of the displacement s of into water throttling valve core, that is:
A＝f(s)——4
More particularly, the displacement s negative correlation of the area A of the cross-section of river of water inlet choke valve and water inlet throttling valve core.
With 3,4 replacement, 2 formulas, obtain following formula:
H
in-H
out＝S
u(f(s))Q
2——5
Be transformed to following formula again:
From 1 formula and 6 formulas as can be seen: the user all is functions of the displacement s of into water throttling valve core with discharge Q, namely, the user uses the variation of discharge Q each time, the displacement s of an equal corresponding water inlet throttling valve core, and the equal corresponding constant voltage of the variation of the displacement s of the throttling valve core of intaking the each time modulus of resistance S of discharge servo valve
u(f (s)).
According to 6 formulas, make the constant voltage pressure differential H of the rear and front end of discharge servo valve
In-H
OutBe steady state value, that is, make constant voltage play the constant voltage effect with the discharge servo valve, only need make the constant voltage modulus of resistance S of discharge servo valve
u(f (s)) and user square are inverse relation and get final product with discharge Q's.
Spring adopts following formula to select for use:
F
max＝K×s
max+F
0＝H
out×A
p——7
In the formula, F
MaxBe positioned at the elastic force of maximum compression point for spring; K is the modulus of elasticity of spring; s
MaxBe the maximum displacement (mark is arranged in the accompanying drawing) that makes progress of water inlet throttling valve core; F
0Initial elastic force for spring; H
OutBe the discharge pressure of constant voltage with the discharge servo valve, that is, and user's water constant pressure value; A
pArea for the following corrosion resistant plate that covers on the barrier film.If selected spring has deviation, that is, and F
MaxH has appearred being not equal to
Out* A
pSituation, can be by regulate the adjusting spanner that is installed in leading screw top cross gap temporarily, rotating threaded shaft makes the upper and lower movement of slide block, compresses or pull-off spring, up to F
MaxEqual H
Out* A
p, unload interim spanner.The purpose of this micromatic setting is set, and is to be convenient to produce in batches.
The change curve of the circular cross section that changes from small to big from top to bottom of water inlet throttling valve core, can launch according to 4 formulas and 6 formulas, obtain with Calculation Method, also can be with testing the method for demarcating, the sample of the change curve of the circular cross section that changes from small to big from top to bottom of the throttling valve core of acquisition water inlet earlier, by the curve fitting method, carry out batch machining production by numerically controlled lathe again.
The method that so-called test is demarcated: be at intake tunnel, adding upward pressure is H
InThe constant pressure source that drives of variable-frequency governor, keep H
InBe steady state value, at delivery port a water tap be installed, by the different opening of water tap, the analog subscriber variation of discharge.Flow of every output, the radius of the circular cross section by changing the water inlet throttling valve core that flushes with water inlet throttle valve seat level circle water inlet makes measured water pressure be stabilized in the discharge pressure steady state value H of design
OutOn.With the radius of the circular cross section of a series of water inlet throttling valve core of obtaining as abscissa x, the length travel of corresponding water inlet throttling valve core is as ordinate y, the line of mapping has just obtained the sample of change curve of the circular cross section that changes from small to big from top to bottom of water inlet throttling valve core.
The present invention has following good effect:
1, highrise building secondary constant pressure water supply system of the present invention carries out the secondary constant voltage by constant voltage with the discharge servo valve, has eliminated constant pressure water supply and has made the inconsistent situation of water arm pressure of supply water of each floor, quality of water supply height because of height change;
2, highrise building secondary constant pressure water supply system of the present invention is simple in structure, does not increase control and management difficulty, the reliability height, and it is little to take building space, not increase equipment operation noise, tap water non-secondary pollution.
Description of drawings:
Accompanying drawing is constant voltage discharge servo valve schematic diagram.
The specific embodiment:
A kind of highrise building secondary constant pressure water supply system, comprise: constant pressure water supply equipment of frequency control, main, secondary constant pressure water supply equipment constant voltage discharge servo valve, floor water arm, constant pressure water supply equipment of frequency control is placed by the height subregion, connect by main, main is positioned at the center of building, be arranged vertically, floor water arm then by main to the both sides horizontal arrangement, in floor water arm entrance, constant voltage discharge servo valve is installed, constant voltage discharge servo valve, as shown in drawings, comprise: valve body 1, barrier film 2, the barrier film 2 of horizontal positioned is divided into valve body 1 with reference to pressure chamber 3 and water flow sensing chamber 4 two parts, with reference to having in the pressure chamber 3, venthole 3-1, spring 3-2, leading screw 3-3, slide block 3-4, the cross section of leading screw 3-3 is circular hollow, last connecting rod 8-2 is through wherein, the round slider 3-4 that circular upright opening is arranged of horizontal positioned is placed in outside the leading screw 3-3, both are connected by the slideway that spirals of slide block 3-4 endoporus with leading screw 3-3 outer wall, the top of going up connecting rod 8-2 among the leading screw 3-3 of hollow is provided with venthole 3-3-1, the top of leading screw 3-3 is provided with the cross gap 3-3-2 that spanner is regulated in interim installation, on the barrier film 2 of horizontal positioned, following two sides is coated with the corrosion resistant plate 2-1 that area equates respectively, 2-2, perpendicular to barrier film 2 planes, be positioned on the barrier film 2, on the following both sides, lower link 8-2,8-1 connects together, pass with the perpendicular bisector of barrier film 2 from the center of barrier film 2 and to overlap, by last, lower link 8-2, the holding screw of 8-1 will cover barrier film 2 on, the corrosion resistant plate 2-1 on following two sides, 2-2 is pressed on the barrier film 2, be provided with delivery port 4-1 in the water flow sensing chamber 4, the bottom in water flow sensing chamber 4 connects the water inlet choke valve, it is the water inlet throttle valve seat 6 of level circle and the water inlet throttling valve core 7 that circular cross section changes from small to big from top to bottom that the water inlet choke valve is provided with the cross-section of river, water inlet throttling valve core 7 is vertically passed the into circular cross-section of river of level of water throttle valve seat 6, overlap with the perpendicular bisector of the circular cross-section of river of level of water inlet throttle valve seat 6, the big end of water inlet throttling valve core 7 cross sections, be positioned at into water inlet one side of water throttle valve seat 6, the upstream face 7-1 of water inlet throttling valve core 7 is circular flat, the area of the following corrosion resistant plate 2-2 that covers on the barrier film 2 is far longer than the into upstream face 7-1 of water throttling valve core 7, the top of water inlet throttling valve core 7 is connected with lower link 8-1, the bottom of water inlet choke valve is circular intake tunnel 5, and intake tunnel 5 is provided with three deflector 5-1 that are evenly arranged in circular intake tunnel 5 inwalls perpendicular to the circular cross-section of river.
The operating principle of highrise building secondary constant pressure water supply system is as follows:
In highrise building secondary constant pressure water supply system of the present invention, one time constant pressure water supply is same as the prior art, difference is to have adopted the constant voltage discharge servo valve of especial manufacture, and be installed in the entrance of floor water arm, carry out the secondary constant voltage by constant voltage with the discharge servo valve, eliminated constant pressure water supply makes each floor because of height change the inconsistent situation of water arm pressure of supply water.
The constant voltage operating principle of discharge servo valve: as shown in drawings, because the area of the following corrosion resistant plate 2-2 that covers on the barrier film 2 is far longer than the upstream face 7-1 of throttling valve core 7, generally, the pressure that this upstream face 7-1 accepts also is far smaller than on the barrier film 2 pressure that the following corrosion resistant plate 2-2 that covers accepts, and the compression that this upstream face 7-1 produces can be ignored with reference to the active force of the spring 3-2 in the pressure chamber 3.When the user stops water, be minimum value with discharge, the liquid in the water flow sensing chamber 4 stop to flow, flowing pressure is zero, and hydrostatic pressure to be maximum value (equal discharge pressure H
Out), at this moment, acting on the pressure maximum on the following corrosion resistant plate 2-2 that covers on the barrier film 2, the compression of generation (equals H with reference to the active force maximum of the spring 3-2 in the pressure chamber 3
Out* A
p, A
pArea for the following corrosion resistant plate 2-2 that covers on the barrier film 2), make the displacement maximum that water throttling valve core 7 into makes progress (equal the maximum displacement s that water throttling valve core 7 into makes progress
Max, mark is arranged in the accompanying drawing); After the user begins water, liquid in the water flow sensing chamber 4 has also produced thereupon and has flowed, part hydrostatic pressure is converted into flowing pressure, the pressure that acts on the following corrosion resistant plate 2-2 that covers on the barrier film 2 is reduced, the compression that produces also reduces with reference to the active force of the spring 3-2 in the pressure chamber 3 thereupon, the elastic force of compressed spring 3-2 obtains part and discharges, and making into, water throttling valve core 7 moves down from the displacement maximum that makes progress; The user is more big with discharge, the speed of the liquid flow in the water flow sensing chamber 4 is just more big, the part that hydrostatic pressure is converted into flowing pressure is just more many, the pressure that acts on the following corrosion resistant plate 2-2 that covers on the barrier film 2 is just more few, the compression that produces is also more little with reference to the active force of the spring 3-2 in the pressure chamber 3, it is just more many that the elastic force of compressed spring 3-2 obtains discharging, and makes that into water throttling valve core 7 is just more big from the distance that the displacement maximum that makes progress moves down.If represent with mathematic(al) representation be exactly:
s＝f(Q)——1
That is, the displacement s of water inlet throttling valve core 7 is functions that the user uses discharge Q.More particularly, the displacement s of water inlet throttling valve core 7 and user use discharge Q negative correlation.
Because intake tunnel 5 is connected with the one-level constant-voltage system, intake pressure H
InBe steady state value, constant voltage is to carry out the secondary constant voltage with the purpose of discharge servo valve, and delivery port 4-1 is connected discharge pressure H with secondary watering equipment (user)
OutAlso be steady state value, the constant voltage pressure differential H of the rear and front end of discharge servo valve
In-H
OutAlso be steady state value, constant voltage satisfies relational expression with the discharge servo valve:
H
in-H
out＝S
uQ
2——2
In the formula, S
uBe the modulus of resistance of constant voltage with the discharge servo valve; Q was the volume flow of valve fluid, that is, the user uses discharge Q.Because constant voltage is crossed the size of water resistance with the discharge servo valve, depend primarily on the into size of water choke valve resistance, S
uCan regard the into modulus of resistance of water choke valve as.And the modulus of resistance S of water inlet choke valve
uBe the function of the area A of the cross-section of river of water choke valve into, that is:
S
u＝f(A) ——3
More particularly, the modulus of resistance S of water inlet choke valve
uThe area A negative correlation of the cross-section of river with the water inlet choke valve.
And the area A of the cross-section of river of water inlet choke valve is the function of the displacement s of into water throttling valve core 7, that is:
A＝f(s)——4
More particularly, the displacement s negative correlation of the area A of the cross-section of river of water inlet choke valve and water inlet throttling valve core 7.
With 3,4 replacement, 2 formulas, obtain following formula:
H
in-H
out＝S
u(f(s))Q
2——5
Be transformed to following formula again:
From 1 formula and 6 formulas as can be seen: the user all is functions of the displacement s of into water throttling valve core 7 with discharge Q, namely, the user uses the variation of discharge Q each time, the displacement s of an equal corresponding water inlet throttling valve core 7, and the equal corresponding constant voltage of the variation of the displacement s of the throttling valve core 7 of intaking the each time modulus of resistance S of discharge servo valve
u(f (s)).
According to 6 formulas, make the constant voltage pressure differential H of the rear and front end of discharge servo valve
In-H
OutBe steady state value, that is, make constant voltage play the constant voltage effect with the discharge servo valve, only need make the constant voltage modulus of resistance S of discharge servo valve
u(f (s)) and user square are inverse relation and get final product with discharge Q's.
Spring 3-2 adopts following formula to select for use:
F
max＝K×s
max+F
0＝H
out×A
p——7
In the formula, F
MaxBe positioned at the elastic force of maximum compression point for spring 3-2; K is the modulus of elasticity of spring 3-2; s
MaxBe the maximum displacement (mark is arranged in the accompanying drawing) that makes progress of water inlet throttling valve core 7; F
0Initial elastic force for spring 3-2; H
OutBe the discharge pressure of constant voltage with the discharge servo valve, that is, and user's water constant pressure value; A
pArea for the following corrosion resistant plate 2-2 of covering on the barrier film 2.If selected spring has deviation, that is, and F
MaxH has appearred being not equal to
Out* A
pSituation, can be by regulate the adjusting spanner that is installed in leading screw 3-3 top cross gap 3-3-2 temporarily, rotating threaded shaft 3-3 makes the upper and lower movement of slide block 3-4, compresses or pull-off spring 3-2, up to F
MaxEqual H
Out* A
p, unload interim spanner.The purpose of this micromatic setting is set, and is to be convenient to produce in batches.
The change curve 7-2 of the circular cross section that changes from small to big from top to bottom of water inlet throttling valve core 7, can launch according to 4 formulas and 6 formulas, obtain with Calculation Method, also can be with testing the method for demarcating, the sample of the change curve 7-2 of the circular cross section that changes from small to big from top to bottom of the throttling valve core 7 of acquisition water inlet earlier, by the curve fitting method, carry out batch machining production by numerically controlled lathe again.
The method that so-called test is demarcated: be at intake tunnel 5, adding upward pressure is H
InThe constant pressure source that drives of variable-frequency governor, keep H
InBe steady state value, at delivery port 4-1 a water tap be installed, by the different opening of water tap, the analog subscriber variation of discharge.Flow of every output, the radius of the circular cross section by changing the water inlet throttling valve core 7 that flushes with water inlet throttle valve seat 6 levels circle water inlet makes measured water pressure be stabilized in the discharge pressure steady state value H of design
OutOn.With the radius of the circular cross section of a series of water inlet throttling valve core 7 of obtaining as abscissa x, the length travel of corresponding water inlet throttling valve core 7 is as ordinate y, the line of mapping has just obtained the sample of change curve 7-2 of the circular cross section that changes from small to big from top to bottom of water inlet throttling valve core 7.
Claims (1)
1. highrise building secondary constant pressure water supply system, it is characterized in that: comprise constant pressure water supply equipment of frequency control, main, secondary constant pressure water supply equipment constant voltage discharge servo valve, floor water arm, constant pressure water supply equipment of frequency control is placed by the height subregion, connect by main, main is positioned at the center of building, be arranged vertically, floor water arm then by main to the both sides horizontal arrangement, in floor water arm entrance, constant voltage discharge servo valve is installed, constant voltage comprises valve body (1) with the discharge servo valve, barrier film (2), the barrier film of horizontal positioned (2) is divided into valve body (1) with reference to pressure chamber (3) and water flow sensing chamber (4) two parts, with reference to having in the pressure chamber (3), venthole (3-1), spring (3-2), leading screw (3-3), slide block (3-4), the cross section of leading screw (3-3) is circular hollow, last connecting rod (8-2) is through wherein, the round slider that circular upright opening is arranged (3-4) of horizontal positioned is placed in outside the leading screw (3-3), both are connected by the slideway that spirals of slide block (3-4) endoporus with leading screw (3-3) outer wall, the top of going up connecting rod (8-2) in the leading screw of hollow (3-3) is provided with venthole (3-3-1), the top of leading screw (3-3) is provided with the cross gap (3-3-2) that spanner is regulated in interim installation, on the barrier film of horizontal positioned (2), following two sides is coated with the corrosion resistant plate (2-1) that area equates respectively, (2-2), perpendicular to barrier film (2) plane, be positioned on the barrier film (2), on the following both sides, lower link (8-2), (8-1) connect together, pass with the perpendicular bisector of barrier film (2) from the center of barrier film (2) and to overlap, by last, lower link (8-2), holding screw (8-1) will cover barrier film (2) on, the corrosion resistant plate on following two sides (2-1), (2-2) be pressed on the barrier film (2), be provided with delivery port (4-1) in the water flow sensing chamber (4), the bottom in water flow sensing chamber (4) connects the water inlet choke valve, it is the water inlet throttle valve seat (6) of level circle and the water inlet throttling valve core (7) that circular cross section changes from small to big from top to bottom that the water inlet choke valve is provided with the cross-section of river, water inlet throttling valve core (7) is vertically passed the into circular cross-section of river of level of water throttle valve seat (6), overlap with the perpendicular bisector of the circular cross-section of river of the level of water inlet throttle valve seat (6), the big end of water inlet throttling valve core (7) cross section, be positioned at into water inlet one side of water throttle valve seat (6), the upstream face (7-1) of water inlet throttling valve core (7) is circular flat, the area that barrier film (2) is gone up the following corrosion resistant plate (2-2) that covers is far longer than the into upstream face (7-1) of water throttling valve core (7), the top of water inlet throttling valve core (7) is connected with lower link (8-1), the bottom of water inlet choke valve is circular intake tunnel (5), and intake tunnel (5) is provided with three deflectors (5-1) that are evenly arranged in circular intake tunnel (5) inwall perpendicular to the circular cross-section of river.
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| CN 201110291601 CN102505734B (en) | 2011-09-30 | 2011-09-30 | Secondary constant-pressure water supply system of high-rise building |
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|---|---|---|---|
| CN 201110291601 CN102505734B (en) | 2011-09-30 | 2011-09-30 | Secondary constant-pressure water supply system of high-rise building |
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| CN108252903B (en) * | 2018-01-10 | 2019-05-31 | 江苏环力科技发展股份有限公司 | A kind of Water pump pressure controller accurately controlled |
| CN114016574B (en) * | 2021-11-18 | 2023-09-26 | 浙江南方智慧水务有限公司 | Integrated variable-frequency constant-pressure secondary water supply equipment |
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| CN201358490Y (en) * | 2009-02-10 | 2009-12-09 | 王雷 | Combined type intelligent positive pressure superimposed feed water device |
| CN201621341U (en) * | 2010-02-08 | 2010-11-03 | 高振龙 | Tap water constant pressure water-saving valve |
| CN202227394U (en) * | 2011-09-30 | 2012-05-23 | 中国农业科学院农田灌溉研究所 | Secondary constant-pressure water supply system for high-rise buildings |
-
2011
- 2011-09-30 CN CN 201110291601 patent/CN102505734B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2095988U (en) * | 1991-03-09 | 1992-02-12 | 许志翔 | Constant output valve |
| JP2002023856A (en) * | 2000-07-07 | 2002-01-25 | Fujikura Rubber Ltd | Reducing valve for liquid |
| CN2921113Y (en) * | 2006-06-20 | 2007-07-11 | 王伐帝 | High-building pipe network pressurizing district water supply device |
| CN201358490Y (en) * | 2009-02-10 | 2009-12-09 | 王雷 | Combined type intelligent positive pressure superimposed feed water device |
| CN201621341U (en) * | 2010-02-08 | 2010-11-03 | 高振龙 | Tap water constant pressure water-saving valve |
| CN202227394U (en) * | 2011-09-30 | 2012-05-23 | 中国农业科学院农田灌溉研究所 | Secondary constant-pressure water supply system for high-rise buildings |
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| CN102505734A (en) | 2012-06-20 |
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