CN203131143U - Pressure difference adjusting valve - Google Patents
Pressure difference adjusting valve Download PDFInfo
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- CN203131143U CN203131143U CN 201320130051 CN201320130051U CN203131143U CN 203131143 U CN203131143 U CN 203131143U CN 201320130051 CN201320130051 CN 201320130051 CN 201320130051 U CN201320130051 U CN 201320130051U CN 203131143 U CN203131143 U CN 203131143U
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- pressure
- valve
- handwheel
- sleeve
- adjusting
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Abstract
The utility model provides a pressure difference adjusting valve. A pressure sensing diaphragm component of the pressure difference adjusting device comprises a pressure sensing diaphragm, as well as an upper pressing piece and a lower pressing piece which vertically clamp the central part of the pressure sensing diaphragm; the periphery of the pressure sensing diaphragm is clamped by an upper cover and a balance seat, and an upper pressure sensing cavity and a lower pressure sensing cavity which are divided by the pressure sensing diaphragm vertically are formed; an interface is formed in the upper cover and used for communicating a pressure pipe and the upper pressure sensing cavity; a pressure spring is arranged outside a central shaft in a sleeving manner, and tightly clamped between a spring seat and a pressure spring bracket; and pressure difference of the upper pressure sensing cavity and the lower sensing cavity results in up-and-down motion of the pressure sensing diaphragm component, correspondingly, the pressure spring is compressed or released, a balance plug is driven to move up and down, and the position of the balance plug entering a fluid flow passage at the center of a valve cavity is changed, so that the flow rate of a fluid is changed. The pressure difference adjusting valve provided by the utility model can operate without external energy, is used in heating collection and air conditioning systems, and is simple and reasonable in structure and large in work pressure difference range.
Description
Technical field
The utility model relates to a kind of modulating valve, particularly relates to a kind of pressure-difference valve.
Background technique
In heating, air-conditioning system, use pressure-difference valve, can play the absorption system network and disturb outward, weaken the effect of disturbing in the controlled part, make system's pressure reduction keep setting value, thus the hydraulic equilibrium of the system of assurance.Because differential pressure control valve has the function that automatic constant is controlled loop pressure reduction, thereby no matter how system pressure changes, and also no matter how the branch road beyond the controlled loop is regulated, and it is constant that differential pressure control valve can both be kept the pressure reduction of controlled loop.When outer net pressure changes, differential pressure control valve is by regulating the aperture of self, absorb the ambient pressure conversion, it is constant with the pressure reduction of keeping controlled loop by the pressure reduction of differential pressure control valve to change fluid, thereby the pressure of isolating beyond the controlled loop changes the influence that controlled loop is caused.Differential pressure control valve also can weaken influencing each other between inner each the branch road load of controlled loop.Because its 26S Proteasome Structure and Function special in different applications, should be determined the position that arranges of pressure difference valve according to usage requirement, system form, and accurate Calculation, setting are controlled pressure difference.
The principle of modulating valve is the same with self-balancing valve in essence.Only in the self-balancing valve, orifice plate is present in the valve body as parts; And do not have these parts of orifice plate in the differential pressure regulating valve, but the system of differential pressure regulating valve back is regarded as an orifice plate, therefore, the actual system gateway pressure difference value thereafter that refers to of the differential pressure value of modulating valve.From the structure of differential pressure regulating valve as can be seen: this modulating valve, purpose are to control thereafter that system gateway pressure difference value immobilizes.Fundamental function is the demand according to hot user's heat load, adjusts hot user's operation flow automatically.
When building building, because the hot customer requirements room temperature that has reduces, then the aperture of corresponding room thermostat valve diminishes, cause the pressure difference of differential pressure regulating valve to become big, surpass setting value, this moment, pressure-difference valve was heightened spool automatically, its system's pressure difference is reduced, until reverting to setting value.Final effect is can not influence other users because of a user, adapts to controlled whole hot users' need heat request, so as to alleviating the frequent operation of thermostat valve.When hot customer requirements improved room temperature, the effect of pressure-difference valve was just in time opposite.
The model utility content
The purpose of this utility model provides a kind of pressure-difference valve that remains unchanged for the pressure reduction of finishing between heating, air-conditioning system different circuit, the differential pressure control valve of same bore can be as required, in its control range, select different control pressure differences to set, and once setting, no matter be that fluctuation appears in networking pressure, still the resistance of controlled device inside changes, and it is constant that differential pressure control valve all will be kept the pressure reduction of controlled device.
In order to solve the problems of the technologies described above, the utility model is achieved through the following technical solutions:
Pressure-difference valve, comprise the handwheel adjusting part and be positioned at described handwheel adjusting part below, with described handwheel adjusting part is fixedlyed connected and the center is coaxial one valve, described one valve comprises loam cake, lower cover, tightens together between loam cake and lower cover and with loam cake and lower cover, its two ends arrange the valve body that flange is connected and be positioned at valve inner and with the differential pressure adjusting device of valve body concentric, it is characterized in that:
Described handwheel adjusting part comprises the coaxial handwheel in center, dial, adjusting axle, Regulation spring and sleeve from top to bottom; The bottom of described sleeve is inserted the central opening of described loam cake and is fixedlyed connected with described loam cake; Described handwheel is fixedlyed connected with the spindle nose of described adjusting axle; The axostylus axostyle of described adjusting axle inserts the center cavity of described sleeve; The rotation of described handwheel drives described adjusting axle and rotates; Described Regulation spring is sheathed on the bottom of described axostylus axostyle outward; Adjusting nut is set in outside the axostylus axostyle of described adjusting axle, and is threaded with described axostylus axostyle and cooperates the bottom crimping of its lower surface and described Regulation spring; Described adjusting nut is spacing by the inwall of described sleeve, moves up and down at the axostylus axostyle of the described adjusting axle in the drive lower edge of adjusting axle, thus correspondingly compression or discharge Regulation spring, and change the setting pressure difference of described pressure-difference valve;
Described differential pressure adjusting device comprises the below that is vertically set on described adjusting axle, vertical coaxial central shaft with described adjusting axle and from top to bottom the pressure-sensitive diaphragm assembly centered by described central shaft, spring seat, stage clip, stage clip support, balance seat and balanced plug;
Described balance seat is connected with the inner wall sealing of described valve body;
The periphery of described stage clip support is connected with the inner wall sealing of described balance seat;
Described pressure-sensitive diaphragm assembly is formed by pressure-sensitive diaphragm with last compressing tablet and lower sheeting that the core of described pressure-sensitive diaphragm clamps up and down; The periphery of described pressure-sensitive diaphragm is clamped by described loam cake and described balance seat, in described valve pocket, form by described pressure-sensitive diaphragm separate up and down on pressure-sensitive chamber and following pressure-sensitive chamber;
Cover on described and have interface, described interface is communicated with PRESSURE PIPE with the described pressure-sensitive chamber of going up; Described spring seat holds out against described lower sheeting from bottom to top;
Described compression spring sleeve is located at outside the described central shaft, and between described spring seat and described stage clip support, and with the upper surface crimping of lower surface and the described stage clip support of described spring seat; Described balanced plug is inserted the center drilling of described balance seat from bottom to top and is tightly connected with the hole wall of described balance seat; Fixedly connected with described balanced plug in the bottom of described central shaft;
Describedly go up the pressure reduction in pressure-sensitive chamber and described pressure-sensitive chamber down and cause moving up and down of pressure-sensitive diaphragm assembly, correspondingly compress or discharge described stage clip, driving described balanced plug moves up and down, change the position of fluid passage that described balanced plug enters the center of described valve pocket, change the negotiable area of described fluid, thereby change the flow of fluid.
Further, the technical solution of the utility model can also be:
The center of described handwheel is cubic hole, and it matches with the cubic spindle nose of described adjusting axle, and locks with socket head screw, and the rotation of described handwheel drives described adjusting axle and rotates thereupon.
Described valve body is made by spheroidal graphite cast iron.
The operating pressure differential scope of described pressure-difference valve is 400-1800mbar/300-1000mbar.
On described balanced plug, the stage clip support passage is arranged, what make described pressure-difference valve goes into water cavity and described down pressure-sensitive chamber conducting.
All indicate registration on the end face of described dial, all indicate the refinement registration on the upper surface of sleeve, described handwheel is provided with dial form and sleeve form; The rotation of described handwheel drives half tooth that assembles on the described sleeve and the engagement of described dial, the number of turns that reads from described dial and the pressure differential resetting value that is described pressure-difference valve from the further refinement number of turns sum that the upper surface of described sleeve reads.
Pressure-difference valve of the present utility model for need not the proportion expression pressure-difference valve that external energy gets final product work, is used for finishing heating, air-conditioning system, guarantees to remain unchanged by the fluid pressure difference in this loop, valve place, and simple and reasonable, the operating pressure differential scope is big.
Description of drawings
Fig. 1 is the structural representation of pressure-difference valve of the present utility model.
Fig. 2 is the surface structure schematic representation of pressure-difference valve of the present utility model.
Fig. 3 is the force analysis figure of the pressure-sensitive diaphragm of pressure-difference valve of the present utility model.
Description of reference numerals
1, stifled 20, the ball valve 21 of handwheel 2, dial 3, half tooth 4, mandrel 5, sleeve 6, jump ring 7, adjusting nut 8, adjusting axle 9, Regulation spring 10, loam cake 11, pressure-sensitive diaphragm assembly 12, spring seat 13, stage clip 14, balanced plug 15, lower cover 16, valve body 17, stage clip support 18, balance seat 19, valve, dial form 22, sleeve form 23, central shaft 24, PRESSURE PIPE 11-1, pressure-sensitive diaphragm
Embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail.
Pressure-difference valve of the present utility model shown in Fig. 1-2, comprise the handwheel adjusting part and be positioned at handwheel adjusting part below, with the one valve that the handwheel adjusting part is fixedlyed connected and the center is coaxial, the one valve comprises loam cake 10, lower cover 15, between loam cake and lower cover, and tighten together with loam cake and lower cover, its two ends arrange the valve body 16 that flange connects, and be positioned at valve inner, and the differential pressure adjusting device with the valve body concentric, wherein, the handwheel adjusting part comprises the coaxial handwheel in center 1 from top to bottom, dial 2, adjusting axle 8, Regulation spring 9 and sleeve 5.
The bottom of sleeve of the present utility model is inserted the central opening of loam cake and is fixedlyed connected with loam cake.
Handwheel of the present utility model is fixedlyed connected with the spindle nose of adjusting axle.
The axostylus axostyle of adjusting axle inserts the center cavity of described sleeve; The rotation of handwheel drives adjusting axle and rotates; Regulation spring is sheathed on the bottom of axostylus axostyle outward and is positioned at the top of differential pressure adjusting device; Adjusting nut 7 is set in outside the axostylus axostyle of adjusting axle, and is threaded with axostylus axostyle and cooperates the top crimping of its lower surface and Regulation spring.
Adjusting nut is spacing by the inwall of sleeve, moves up and down at the axostylus axostyle of the drive lower edge of adjusting axle adjusting axle, thus correspondingly compression or discharge Regulation spring, and change the setting pressure difference of pressure-difference valve.
In this example, the center of handwheel is cubic hole, and it matches with the cubic spindle nose of adjusting axle, and locks with socket head screw, and the rotation of handwheel drives adjusting axle and rotates thereupon.
Valve body of the present utility model is made by spheroidal graphite cast iron.Gray cast iron valve body than same specification can bear bigger working pressure.
All indicate registration 0-9 on the end face of dial of the present utility model, all indicate refinement registration 0-9 on the upper surface of sleeve, handwheel is provided with dial form 21 and sleeve form 22, half tooth 3 that assembles on the rotating band moving sleeve of handwheel and dial engagement, the number of turns on the dial that reads from the dial form, for example 8, with the further refinement number of turns on the sleeve that reads from the sleeve form, for example, the number of turns on the dial that reads from the dial form is 8, and the further refinement number of turns on the sleeve that reads from the sleeve form is 3, and this moment, the handwheel total indicator reading was 8.3 circles, according to corresponding list data, corresponding pressure differential resetting value at this moment.The dextrorotation handwheel, handwheel mark scale indication pressure reduction augment direction.
Differential pressure adjusting device of the present utility model comprises the below that is vertically set on adjusting axle, vertical coaxial central shaft 23 with adjusting axle and from top to bottom the pressure-sensitive diaphragm assembly 11 centered by central shaft, spring seat 12, stage clip 13, stage clip support 17, balance seat 18 and balanced plug 14.
Balance seat of the present utility model is connected with the inner wall sealing of valve body.
The periphery of stage clip support of the present utility model is connected with the inner wall sealing of balance seat.
Pressure-sensitive diaphragm assembly of the present utility model is formed by pressure-sensitive diaphragm 11.1 with last compressing tablet and lower sheeting that the core of pressure-sensitive diaphragm clamps up and down, and spring abutment holds out against lower sheeting from bottom to top.The periphery of pressure-sensitive diaphragm is fixedly clamped by loam cake and balance seat, relies on the ductility of self to extend up and down, and in valve pocket, form by pressure-sensitive diaphragm separate up and down on pressure-sensitive chamber and following pressure-sensitive chamber.
The operating pressure differential scope of pressure-difference valve of the present utility model is 400-1800mbar/300-1000mbar.In the 400-1800mbar/300-1000mbar, the displacement amount that produces is very little.Pressure-difference valve of the present utility model can not insert pipeline, rotate handwheel and preset pressure difference, by fully can be with the relative setting value of control pressure reduction (handwheel show value) of equilibrium state to the selection of spring rate, pre compressed magnitude depart from control within more among a small circle.
Compression spring sleeve of the present utility model is located at outside the central shaft, and between spring seat and stage clip support, and with the upper surface crimping of lower surface and the stage clip support of spring seat; Balanced plug is inserted the center drilling of balance seat from bottom to top and is tightly connected with the hole wall of balance seat; Fixedly connected with balanced plug in the bottom of central shaft.
Of the present utility modelly go up the pressure reduction in pressure-sensitive chamber and following pressure-sensitive chamber and cause moving up and down of pressure-sensitive diaphragm assembly, correspondingly compress or discharge stage clip, the drive balanced plug moves up and down, change the position of fluid passage C that balanced plug enters the center of valve pocket, change the negotiable area of fluid, thereby change the flow by the fluid of modulating valve.
On balanced plug of the present utility model, the stage clip support passage is arranged, what make pressure-difference valve goes into water cavity and following pressure-sensitive chamber conducting.
Pressure-difference valve of the present utility model is installed on the water return pipeline, by on cover the interface that has, PRESSURE PIPE 24 is communicated with last pressure-sensitive chamber.PRESSURE PIPE is connected on the water pipe, and interface and PRESSURE PIPE are led into pressure-sensitive diaphragm top with pressure of supply water P1.
The passage of ball valve 20 sealings with water-inlet cavity A conducting, is the designated lane of the measurement intake pressure P2 of reservation; Can also annotate draining by ball valve 20.The intake pressure of pressure-difference valve of the present utility model is P2.
The passages of stifled 19 sealings of valve, can with backwater cavity B conducting, be the designated lane of the measurement pressure of return water P3 that reserves.
The control pressure reduction of differential pressure control valve of the present utility model is P1-P2.
Be that object carries out force analysis with the pressure-sensitive diaphragm to the differential pressure control valve that is installed on the return pipe, as shown in Figure 3, when the pressure-sensitive diaphragm stress balance, have:
P1·S+F1=P2·S+F2
S---effective diaphragm area
F1---Regulation spring pretightening force
K1---Regulation spring elasticity coefficient
△ L1---Regulation spring decrement
F2---stage clip elastic force
K2---stage clip elasticity coefficient
△ L2---stage clip decrement
Be △ P=P1-P2=(F2-F1)/S=(K2 △ L2-K1 △ L1)/S
Working condition analyzes one: (network is disturbed outward, the ambient pressure conversion)
When pressure of supply water P1 increase, this moment, pressure of return water P3 is constant, and the supply head at networking (P1-P3) increases, and pressure-sensitive diaphragm drives balanced plug and moves down, and namely moves to valve closing direction, and the resistance of valve this moment is increased, (P2-P3) increase, and namely P2 increases; Otherwise in like manner, P1 reduces when pressure of supply water, and this moment, pressure of return water P3 is constant, the supply head at networking (P1-P3) reduces, and pressure-sensitive diaphragm drives on the balanced plug and moves, and namely moves to the valve opening direction, the resistance of valve this moment is reduced, (P2-P3) reduce, namely P2 reduces.Working condition analyzes two: (disturbing the conversion of the inner branch road pressure of controlled loop in the controlled part)
Resistance when controlled loop inside changes, and turn-offs such as a certain branch road, and the drag overall of loop increases, and this moment, P2 increases, and pressure-sensitive diaphragm drives on the balanced plug and moves, and namely moves to the valve opening direction, and the resistance of valve this moment is reduced, and P2 reduces again to fall after rise; Otherwise in like manner, the drag overall of loop reduces, and this moment, P2 reduces, and pressure-sensitive diaphragm drives balanced plug and moves down, and namely moves to valve closing direction, and the resistance of valve this moment is increased, and P2 increases rise again.
The operating pressure differential scope of differential pressure control valve of the present utility model: 400-1800mbar/300-1000mbar finally reaches state of equilibrium, and △ P=P1-P2 is almost constant.Actual pressure differential is excessive or too smallly all will make spring failure, causes the valve can't proper functioning.So, must guarantee that the pipeline pressure reduction of valve mounting point point changes in the scope that valve allows.
New balance situation has, △ P '=P1 '-P2 '=(F2 '-F1 ')/S.Obviously, under the new balance condition, △ P ' ≠ △ P, F2 ' ≠ F2, F1 ' ≠ F1.Working condition one and two times, stroke is very little up and down in balanced plug work, namely the decrement under the working state of stage clip change very little, with respect to the initial compression amount of stage clip, very little.So, under the new balance condition, △ P ' and △ P approximately equal.Strict says that under the different opening, the control pressure reduction of equilibrium state is different, but by to the selection of spring rate, pre compressed magnitude fully can with the control pressure reduction absolute presupposition definite value of equilibrium state depart from control within more among a small circle, be generally about 5%.
Above-mentionedly only several specific embodiments in the utility model are illustrated; but can not be as protection domain of the present utility model; every equivalence of having done according to the design spirit in the utility model changes or modifies, and all should think to fall into protection domain of the present utility model.
Claims (6)
1. pressure-difference valve, comprise the handwheel adjusting part and be positioned at described handwheel adjusting part below, with described handwheel adjusting part is fixedlyed connected and the center is coaxial one valve, described one valve comprises loam cake, lower cover, tightens together between loam cake and lower cover and with loam cake and lower cover, its two ends arrange the valve body that flange is connected and be positioned at valve inner and with the differential pressure adjusting device of valve body concentric, it is characterized in that:
Described handwheel adjusting part comprises the coaxial handwheel in center, dial, adjusting axle, Regulation spring and sleeve from top to bottom; The bottom of described sleeve is inserted the central opening of described loam cake and is fixedlyed connected with described loam cake; Described handwheel is fixedlyed connected with the spindle nose of described adjusting axle; The axostylus axostyle of described adjusting axle inserts the center cavity of described sleeve; The rotation of described handwheel drives described adjusting axle and rotates; Described Regulation spring is sheathed on the bottom of described axostylus axostyle outward; Adjusting nut is set in outside the axostylus axostyle of described adjusting axle, and is threaded with described axostylus axostyle and cooperates the bottom crimping of its lower surface and described Regulation spring; Described adjusting nut is spacing by the inwall of described sleeve, moves up and down at the axostylus axostyle of the described adjusting axle in the drive lower edge of adjusting axle, thus correspondingly compression or discharge Regulation spring, and change the setting pressure difference of described pressure-difference valve;
Described differential pressure adjusting device comprises the below that is vertically set on described adjusting axle, vertical coaxial central shaft with described adjusting axle and from top to bottom the pressure-sensitive diaphragm assembly centered by described central shaft, spring seat, stage clip, stage clip support, balance seat and balanced plug;
Described balance seat is connected with the inner wall sealing of described valve body;
The periphery of described stage clip support is connected with the inner wall sealing of described balance seat;
Described pressure-sensitive diaphragm assembly is formed by pressure-sensitive diaphragm with last compressing tablet and lower sheeting that the core of described pressure-sensitive diaphragm clamps up and down; The periphery of described pressure-sensitive diaphragm is clamped by described loam cake and described balance seat, in described valve pocket, form by described pressure-sensitive diaphragm separate up and down on pressure-sensitive chamber and following pressure-sensitive chamber;
Cover on described and have interface, described interface is communicated with PRESSURE PIPE with the described pressure-sensitive chamber of going up; Described spring seat holds out against described lower sheeting from bottom to top;
Described compression spring sleeve is located at outside the described central shaft, and between described spring seat and described stage clip support, and with the upper surface crimping of lower surface and the described stage clip support of described spring seat; Described balanced plug is inserted the center drilling of described balance seat from bottom to top and is tightly connected with the hole wall of described balance seat; Fixedly connected with described balanced plug in the bottom of described central shaft;
Describedly go up the pressure reduction in pressure-sensitive chamber and described pressure-sensitive chamber down and cause moving up and down of pressure-sensitive diaphragm assembly, correspondingly compress or discharge described stage clip, driving described balanced plug moves up and down, change the position of fluid passage that described balanced plug enters the center of described valve pocket, change the negotiable area of described fluid, thereby change the flow of fluid.
2. pressure-difference valve according to claim 1, it is characterized in that: the center of described handwheel is cubic hole, it matches with the cubic spindle nose of described adjusting axle, and with socket head screw locking, the rotation of described handwheel drives described adjusting axle and rotates thereupon.
3. pressure-difference valve according to claim 1, it is characterized in that: described valve body is made by spheroidal graphite cast iron.
4. pressure-difference valve according to claim 1, it is characterized in that: the operating pressure differential scope of described pressure-difference valve is 400-1800mbar/300-1000mbar.
5. pressure-difference valve according to claim 1 is characterized in that: on described balanced plug, the stage clip support passage is arranged, what make described pressure-difference valve goes into water cavity and described pressure-sensitive chamber conducting down.
6. pressure-difference valve according to claim 1, it is characterized in that: all indicate registration on the end face of described dial, all indicate the refinement registration on the upper surface of sleeve, described handwheel is provided with dial form and sleeve form; The rotation of described handwheel drives half tooth that assembles on the described sleeve and the engagement of described dial, the number of turns that reads from described dial and the pressure differential resetting value that is described pressure-difference valve from the further refinement number of turns sum that the upper surface of described sleeve reads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320130051 CN203131143U (en) | 2013-03-21 | 2013-03-21 | Pressure difference adjusting valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320130051 CN203131143U (en) | 2013-03-21 | 2013-03-21 | Pressure difference adjusting valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203131143U true CN203131143U (en) | 2013-08-14 |
Family
ID=48939123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320130051 Expired - Lifetime CN203131143U (en) | 2013-03-21 | 2013-03-21 | Pressure difference adjusting valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203131143U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106594342A (en) * | 2015-10-15 | 2017-04-26 | 北京海林绿建节能技术有限公司 | Pressure difference balance valve |
-
2013
- 2013-03-21 CN CN 201320130051 patent/CN203131143U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106594342A (en) * | 2015-10-15 | 2017-04-26 | 北京海林绿建节能技术有限公司 | Pressure difference balance valve |
| CN106594342B (en) * | 2015-10-15 | 2019-03-15 | 北京优能智慧节能科技有限公司 | Differential pressure balancing valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130814 |