CN208719439U - A kind of double diaphragm counterbalance valves - Google Patents
A kind of double diaphragm counterbalance valves Download PDFInfo
- Publication number
- CN208719439U CN208719439U CN201821257194.3U CN201821257194U CN208719439U CN 208719439 U CN208719439 U CN 208719439U CN 201821257194 U CN201821257194 U CN 201821257194U CN 208719439 U CN208719439 U CN 208719439U
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- CN
- China
- Prior art keywords
- diaphragm
- valve
- spring
- damper
- counterbalance
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Abstract
The utility model discloses a kind of double diaphragm counterbalance valves, are made of valve body, valve deck, valve rod, load cell, spring, diaphragm, damper and display unit etc..Upper layer and lower layer diaphragm separates to form middle cavity by metal support chip, and spring and damper are fixed on the diaphragm of upper layer by bottom plate, and the upstream position of lower layer's diaphragm is provided with aperture.When work, rotation handwheel moves down valve rod, and valve is in close state.When Fluid pressure is greater than the set value, the upward compressed spring of diaphragm, counterbalance valve is opened, and fluid starts to flow；When Fluid pressure is less than setting value, spring pushes diaphragm to close counterbalance valve downwards, and flowing stops.The aperture of lower layer's diaphragm makes Fluid pressure be passed to cavity between two diaphragms, and upper layer diaphragm is pressurized uniformly, and diaphragm, spring and damper stress relative equilibrium, valve event are steady.Damper makes valve event gentle, reduces the disturbance to flowing.
Description
Technical field
The utility model relates to flow control valve technical field, specially a kind of double diaphragm counterbalance valves.
Background technique
The effect of counterbalance valve is to maintain pressure needed for pipeline, enables the normal output flow of pump in pipeline.For example, for
Metering pump isometric(al) pump, works in low loine pressure and will appear excessive conveying, in order to prevent this problem, need to measure
There is certain back pressure in the outlet of pump, generally just reaches this purpose by installing counterbalance valve in metering pump discharge.
Traditional back pressure valve arrangement is similar with one-way flow valve, and pressure control is realized by built-in spring, when flowing in pipe
Body pressure ratio set pressure hour, diaphragm close valve under the effect of spring force, when Fluid pressure is bigger than setting pressure,
Diaphragm compressed spring, valve opening.
The turning of conventional back pressure valve runner is more, and therefore, flow losses are bigger.In various types of valves, diaphragm valve is pressure
Damage smaller one kind.Diaphragm valve is provided with a flexible diaphragm in valve body and valve deck, and valve seat is generally weir shape, is opened and closed with diaphragm
Part closed flow, truncation fluid.Diaphragm is often made of the elasticity such as rubber, plastics, resistant material.The manipulation such as valve rod of diaphragm valve
Mechanism is separated with medium channel, ensure that the pure of working media, while not with media contact at valve rod, is not needed using any
The independent sealing of form, so that diaphragm valve structure is simple, sealing and antiseptic property are preferable, fluid resistance is small.
In conjunction with the work characteristics of common diaphragm valve, the counterbalance valve that a kind of flow resistance is small, is suitable for corrosive media is designed,
It is the starting point of utility model works.
Utility model content
In order to solve the above technical problems existing in the prior art, the utility model provides a kind of double diaphragm back pressures
Valve, including valve body, valve deck, lower layer's diaphragm, upper layer diaphragm, bottom plate, lower spring cup, sleeve, valve rod, handwheel, thrust bearing, upper bullet
Spring abutment, damper, spring, load cell, metal support chip, display unit, lower layer's diaphragm and upper layer diaphragm pass through metal branch
Blade separates to form middle cavity, and spring and damper are fixed on the diaphragm of upper layer by upper spring seat, lower spring cup and bottom plate.
Further, damper is installed between the upper and lower spring base.
Further, lower layer's diaphragm upstream position is provided with a Duan little Kong.
Further, the load cell is installed between lower spring cup and bottom plate.
Further, the thrust bearing is set between the valve rod and upper spring seat.
Further, the valve rod is connected with handwheel.
The utility model has the beneficial effect that
1) double diaphragm counterbalance valves of the utility model are as general as diaphragm valve form, and flow direction becomes when fluid flows through valve
Change gently, for overall flow close to axis stream, flow resistance is small；
2) design of double diaphragms and the aperture of lower layer's diaphragm, so that Fluid pressure is transmitted to the cavity between layer diaphragm,
Upper layer diaphragm is acted on by uniform pressure, deforms relatively uniform, the bottom plate and bullet fixed thereon being fixed on the diaphragm of upper layer
The movements such as spring, damper and radial force are relatively small and balanced, and valve event is steady.It should be noted that lower layer's diaphragm with
One lateral pressure of fluid contact is uneven, will affect biseptate structural strain's uniformity, but compare in the case of double diaphragm designs
Single-layer septum deformation uniformity is well very much.
3) in addition to installation spring is also equipped with damper between upper lower spring cup, damper has the higher-order of oscillation of spring
Good elimination effect thus can avoid spring caused by Fluid pressure quickly changes and acutely vibrate.This design is so that valve
Door opening and closing and aperture transition activities are gentle, reduce the disturbance to flowing in pipe.
4) in the back pressure valve arrangement of the utility model, thrust bearing is housed, thus very between valve rod and upper spring seat
Conduction of the valve rod rotating torque to the components such as spring and load cell, load cell and spring master are reduced in big degree
Responsive to axial force is born, so that valve operation is more flexible, smooth, steady.In addition, the presence of sleeve can make spring base only
It is vertically axially moved, guarantees the stability of valve long-term work.
5) by load cell and display unit, which can show preset pressure, carry out valve pressure with can be convenient
Power setting and monitoring.
Detailed description of the invention
Fig. 1 is double diaphragm counterbalance valve structural schematic diagrams；
Fig. 2 is that double diaphragm counterbalance valves close schematic diagram；
Fig. 3 is that regulating valve opens schematic diagram；
In figure: 1- valve body, 2- valve deck, 3- lower layer diaphragm, the upper layer 4- diaphragm, 5- bottom plate, 6- lower spring cup, 7- sleeve, 8-
Valve rod, 9- handwheel, 10- thrust bearing, 11- upper spring seat, 12- damper, 13- spring, 14- load cell, 15- metal branch
Blade, 16- display unit.
Specific embodiment
The utility model is described further below by attached drawing.
As shown in Figure 1, double diaphragm counterbalance valves of the utility model, by valve body 1, valve deck 2, lower layer's diaphragm 3, upper layer diaphragm 4,
Bottom plate 5, lower spring cup 6, sleeve 7, valve rod 8, handwheel 9, thrust bearing 10, upper spring seat 11, damper 12, spring 13, dynamometry
Sensor 14, metal support chip 15, display unit 16 form.Lower layer's diaphragm 3 and upper layer diaphragm 4 are separated by metal support chip 15
It forms middle cavity, spring 13 and damper 12 and upper layer diaphragm 4 is fixed on by upper spring seat 11, lower spring cup 6 and bottom plate 5
On, the upstream position of lower layer's diaphragm 3 is provided with a Duan little Kong.Damper 12 is installed between upper and lower spring base.Load cell 14 is pacified
Loaded between lower spring cup 6 and bottom plate 5.Thrust bearing 10 is housed between valve rod 8 and upper spring seat 11.
It when valve working, is flowed on the left of fluid, right side outflow, in axial flowing.Rotation handwheel 9 keeps valve rod 8 downward first
Mobile, spring 13 pushes diaphragm to close counterbalance valve downwards, and valve working back pressure is made to be set in preset value.When Fluid pressure is less than
When counterbalance valve preset value, valve is in close state；When Fluid pressure is greater than the set value, the upward compressed spring of diaphragm, back pressure
Valve is opened, and is managed interior medium and is started to flow.Pipeline work pressure is allowed in this way not less than setting value.3 upstream side of lower layer's diaphragm is small
The effect in hole be allow Fluid pressure be passed to two diaphragms between cavity so that upper layer diaphragm be pressurized it is relatively uniform, diaphragm, spring and
Damper stress relative equilibrium, valve event are steady.The effect of damper 12 is spring 13 caused by slow pressure quickly changes
Acutely oscillation, keeps valve event more gentle, reduces the disturbance to flowing in pipe.The work of load cell 14 and display unit 16
With being measurement and display spring force, which corresponds to the Fluid pressure of valve opening, so as to easily carry out valve pressure
The setting of power.The effect of thrust bearing 10 is reduced when valve rod 8 rotates to components such as lower lateral spring 13 and load cells 14
Torsional moment so that valve operation is more flexible, smooth.
Fig. 2 shows back pressure valve closing state.Rotate handwheel and preset pipeline back pressure, when in pipeline Fluid pressure be less than it is default
When pressure, diaphragm is in close contact with valve body under the effect of spring force, and close flow channel, fluid cannot pass through counterbalance valve.
Due to being equipped with thrust bearing between valve rod and upper spring seat, when handwheel band ovable valve stem is rotated and is moved up and down, spring and dynamometry
The rotating torque of sensor greatly reduces, and keeps valve operation steady, flexible.Due to being equipped with load cell and display unit, valve
Door preset pressure can show that valve operation is convenient, intuitive, accurate.
Fig. 3 shows regulating valve open state.When pipeline pressure is more than preset pressure, lower diaphragm plate is acted in Fluid pressure
Push the spring and damper move up, and flow channel is connected, and fluid flows on the left of regulating valve, right side outflow.Due to valve
Axial-flow type diaphragm valve scheme is generally used, flow resistance is relatively small, belongs to energy-saving valve.When there are pressure in pipeline
It, can be to avoid the additional vibration generated by counterbalance valve due to making valve event than more gentle equipped with damper when with flowed fluctuation
It swings, reduces the interference flowed to tube fluid.The design of double diaphragms makes the pressure conduction of fluid to the cavity between two-layer separator,
Upper layer diaphragm is acted on by uniform pressure, deforms relatively uniform, the bottom plate and bullet fixed thereon being fixed on the diaphragm of upper layer
The movements such as spring, damper and radial force are relatively small and balanced, and valve event is steady, while can extend valve and use the longevity
Life.
Claims (6)
1. a kind of double diaphragm counterbalance valves, including valve body (1), valve deck (2), lower layer's diaphragm (3), upper layer diaphragm (4), bottom plate (5), under
Spring base (6), sleeve (7), valve rod (8), handwheel (9), thrust bearing (10), upper spring seat (11), damper (12), spring
(13), load cell (14), metal support chip (15), display unit (16), it is characterised in that: lower layer's diaphragm (3) and upper layer
Diaphragm (4) separates to form middle cavity by metal support chip (15), and spring (13) and damper (12) pass through upper spring seat
(11), lower spring cup (6) and bottom plate (5) are fixed on upper layer diaphragm (4).
2. double diaphragm counterbalance valves as described in claim 1, it is characterised in that: install damper between the upper and lower spring base
(12).
3. double diaphragm counterbalance valves as described in claim 1, it is characterised in that: lower layer's diaphragm (3) upstream position is provided with one
Duan little Kong.
4. double diaphragm counterbalance valves as claimed in claim 3, it is characterised in that: the load cell (14) is installed on lower spring
Between seat (6) and bottom plate (5).
5. double diaphragm counterbalance valves as described in claim 1, it is characterised in that: between the valve rod (8) and upper spring seat (11)
The thrust bearing (10) are set.
6. double diaphragm counterbalance valves as described in claim 1, it is characterised in that: the valve rod (8) and handwheel (9) connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821257194.3U CN208719439U (en) | 2018-08-06 | 2018-08-06 | A kind of double diaphragm counterbalance valves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821257194.3U CN208719439U (en) | 2018-08-06 | 2018-08-06 | A kind of double diaphragm counterbalance valves |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208719439U true CN208719439U (en) | 2019-04-09 |
Family
ID=65976324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821257194.3U Expired - Fee Related CN208719439U (en) | 2018-08-06 | 2018-08-06 | A kind of double diaphragm counterbalance valves |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208719439U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108869785A (en) * | 2018-08-06 | 2018-11-23 | 中国计量大学 | A kind of double diaphragm counterbalance valves |
-
2018
- 2018-08-06 CN CN201821257194.3U patent/CN208719439U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108869785A (en) * | 2018-08-06 | 2018-11-23 | 中国计量大学 | A kind of double diaphragm counterbalance valves |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190409 Termination date: 20200806 |