CN202349380U - Surging-prevention adjusting valve with speeding-up compensation - Google Patents
Surging-prevention adjusting valve with speeding-up compensation Download PDFInfo
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- CN202349380U CN202349380U CN 201120463243 CN201120463243U CN202349380U CN 202349380 U CN202349380 U CN 202349380U CN 201120463243 CN201120463243 CN 201120463243 CN 201120463243 U CN201120463243 U CN 201120463243U CN 202349380 U CN202349380 U CN 202349380U
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Abstract
The utility model relates to a valve, and aims at providing a surging prevention adjusting valve with speeding-up compensation. The valve comprises a butterfly valve body and an pneumatic actuating mechanism, wherein a pneumatic control mechanism connected to an air cylinder comprises an electromagnetic valve, a valve positioner, a pressure switch, two pneumatic control valves and pipeline for realizing connection; the valve positioner and the electromagnetic valve are connected with an air source, and the electromagnetic valve is used for providing driving air for the two pneumatic control valves; and the air cylinder at least is provided with two mutually non-communicated cavity bodies, and the cavity bodies are respectively connected with the two pneumatic control valve by respective vent hole, one cavity body is communicated to the P port of the valve positioner and the other cavity body is communicated to the A port of the valve positioner. By adopting the valve, the accurate control of the valve can be realized under normal conditions; on occasions that the electromagnetic valve is powered-off, the problem of insufficient restoring force of the spring is offset by a manner of rapidly introducing air to the air in which the spring is located, so that the opening speed of the valve is increased; and when the air source goes wrong, the normal working function can be maintained by the resetting of the spring in the air cylinder.
Description
Technical field
The utility model relates to a kind of valve.More particularly, the utility model relates to a kind of anti-surge modulating valve with the speedup compensation.
Background technique
In the blower operation process, when flow constantly reduced near minimum value Qmin (surging condition), the air-flow that gets into leaf grating separated, and moves along the impeller sense of rotation and with the speed littler than impeller angular velocity of rotation in the separation zone.When breaking away from, rotation is diffused into whole passage; Blower export pressure is declined to a great extent suddenly; And pressure does not lower at once in the pipe network; So the gas pressure in the pipe network is just greater than the pressure at blower export place, the gas in the pipe network flows backwards to blower, and the pressure in pipe network drops to and is lower than blower export pressure and just stops.Then, blower begins to the pipe network air feed, the gas that flows backwards is extruded go; Make flow minimizing in the machine, pressure descends suddenly once more, and the gas in the pipe network flows backward in the blower fan again; So go round and begin again, in whole system, produce the pressure pulsation and the air-flow oscillatory occurences of periodic low frequency high amplitude, and send the very big sound; Machine produces high vibration, so that can't work, and this has just produced surge.
Because the surge meeting makes the unit high vibration, the flow fluctuation possibly damaged the blower machine and cause serious production accident.For preventing the generation of surge, reduce the energy loss that vibration interference causes, need to use the anti-surge valve and come control flow rate.The task of blower Anti-surge Control when gas flow drops to a certain lower safety limit value, is automatically opened the anti-surge valve exactly fast, through the external resistance transmission & distribution characteristic of quick change blower, thereby avoids getting into surge area.A kind of being specifically designed to also useless prevents that the safety control valving of surging phenomenon from appearring in blower at work at present.
The model utility content
The technical problem that the utility model will solve is, overcomes deficiency of the prior art, and a kind of anti-surge modulating valve with the speedup compensation is provided.
In order to solve the problems of the technologies described above, the utility model is realized through following technological scheme:
A kind of anti-surge modulating valve with speedup compensation is provided, comprises butterfly valve body and pneumatic actuator, the pneumatic control mechanism that is connected to cylinder comprises solenoid valve, valve positioner, pressure switch, two Pneumatic valves and the pipeline that is used to realize being connected; Said valve positioner all links to each other with source of the gas with solenoid valve, and is that two Pneumatic valves provide driving gas by solenoid valve; Said cylinder has two mutual disconnected cavitys at least, and one of them is for being provided with Returnning spring in another cavity of cavity; Linked to each other with the A mouth of two Pneumatic valves respectively by separately vent on two cavitys, first Pneumatic valve that joins with cavity is communicated to the P mouth of valve positioner, and second Pneumatic valve that joins with Returnning spring place cavity is communicated to the A mouth of valve positioner.
As a kind of improvement, said source of the gas links to each other with valve positioner, solenoid valve and pressure switch respectively after filtering reduction valve.
As a kind of improvement, said cylinder is a single-acting angle stroke cylinder.
As a kind of improvement, the power line of said pressure switch and solenoid valve is for connecting.
As a kind of improvement, under nominal situation: the gas through filtering pressure reducing valve is divided into two-way, and one the tunnel connects the P mouth of solenoid valve, and this moment, solenoid valve was charged, and A mouth and P mouth are communicated with, and R mouth and A mouth break off, and first Pneumatic valve and second Pneumatic valve are brought about the desired sensation; The A mouth of first Pneumatic valve and P mouth are communicated with, and R mouth and A mouth break off; The R mouth of second Pneumatic valve is communicated with the A mouth, and A mouth and P mouth break off; Another road gas connects the P mouth of valve positioner, and the A mouth of valve positioner is connected to first Pneumatic valve and second Pneumatic valve respectively; Under urgent anti-surge operating mode: the solenoid valve dead electricity, the A mouth of solenoid valve and R mouth are communicated with, and P mouth and A mouth break off, and first Pneumatic valve and second Pneumatic valve lose gas; The A mouth of second Pneumatic valve and R mouth break off, and P mouth and A mouth are communicated with; The A mouth of second Pneumatic valve and R mouth are communicated with; When source of the gas lost gas, pressure switch was broken off, the solenoid valve dead electricity.
Compared with prior art, the beneficial effect of the utility model is:
1. under normal circumstances, can realize the accurate control of valve.
2. under solenoid valve dead electricity situation, can remedy spring through the mode that belongs to the gas fast aeration toward spring and reply hypodynamic problem, improve the opening speed of valve.
3. when source of the gas breaks down, can keep the function of proper functioning through resetting of spring in the cylinder.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Each reference character is: 1 valve positioner, 2 first Pneumatic valves, 3 cylinders, 4 second Pneumatic valves, 5 solenoid valves, 6 pressure switches, 7 filtering pressure reducing valves, 8 sources of the gas.
Embodiment
As shown in Figure 1; The anti-surge modulating valve of the band speedup compensation in the utility model; Comprise butterfly valve body and pneumatic actuator, the pneumatic control mechanism that is connected to cylinder 3 comprises solenoid valve 5, valve positioner 1, pressure switch 6, two Pneumatic valves and the pipeline that is used to realize being connected; Valve positioner 1 all links to each other with source of the gas 8 with solenoid valve 5, and is that two Pneumatic valves provide driving gas by solenoid valve 5; Cylinder 3 has two mutual disconnected cavitys at least, and one of them is for being provided with Returnning spring in another cavity of cavity; Linked to each other with the A mouth of two Pneumatic valves respectively by separately vent on two cavitys, first Pneumatic valve 2 that joins with cavity is communicated to the P mouth of valve positioner 1, and second Pneumatic valve 4 that joins with Returnning spring place cavity is communicated to the A mouth of valve positioner 1.
In the utility model, the P mouth of said each valve is a suction port, and the A mouth is the air outlet, and the R mouth is row's atmospheric air port.
The P mouth of valve positioner 1 links to each other with source of the gas, and according to the size of external control signal, the gas that gets into the P mouth is imported the A mouth, the opening big or turn down of control valve.
First Pneumatic valve 2 is the three port two position type, and its P mouth links to each other with the A mouth of valve positioner 1, and the A mouth links to each other with the cavity of cylinder 3.Under the situation of bringing about the desired sensation, the P mouth of first Pneumatic valve 2 and A mouth are communicated with; Losing under the gas situation, the R mouth of first Pneumatic valve 2 and A mouth are communicated with.
Second Pneumatic valve 4 is the three port two position type, and its A mouth is connected with the cavity at cylinder 3 inner springs place.Under the situation of bringing about the desired sensation, the R mouth of second Pneumatic valve 4 and A mouth are communicated with; Losing under the gas situation, the P mouth of second Pneumatic valve 4 and A mouth are communicated with.
1, normal regulating valve operating mode:
Under the normal condition, the gas through filtering pressure reducing valve 7 is divided into two-way, and one the tunnel connects the P mouth of solenoid valve 5, and this moment, solenoid valve 5 was charged, and the A mouth is communicated with the P mouth, R mouth and the disconnection of A mouth, and gas brings about the desired sensation win Pneumatic valve 2 and second Pneumatic valve 4 through solenoid valve 5.This moment, the A mouth and the P mouth of first Pneumatic valve 2 were communicated with, and R mouth and A mouth break off, and the R mouth of second Pneumatic valve 4 is communicated with the A mouth, and A mouth and P mouth break off.Another road gas is switched to the P mouth of valve positioner 1, and when control signal (DCS or PLC output to the 4-20mA signal of intelligent positioner) increased, the P mouth of valve positioner 1 and A mouth were communicated with, and gas enters into the cavity of cylinder 3 through first Pneumatic valve 2; Meanwhile the gas in the cavity of spring place is discharged through the R mouth of second Pneumatic valve 4, and valve is closed gradually.Otherwise when control signal reduced, the gas of cylinder 3 inner chamber body was discharged from the A mouth of valve positioner 1 through first Pneumatic valve 2, spring reset, and valve is opened gradually.
2, urgent anti-surge operating mode:
This moment solenoid valve 5 dead electricity, the A mouth of solenoid valve 5 is communicated with the R mouth, P mouth and the disconnection of A mouth, first Pneumatic valve 2 and second Pneumatic valve, 4 mistake gas.The A mouth of second Pneumatic valve and R mouth break off; P mouth and A mouth are communicated with, and the A mouth of second Pneumatic valve and R mouth are communicated with, and this moment, gas got into the cavity at spring place fast through second Pneumatic valve 4; Gas in another cavity is discharged through the outspoken speed of R of first Pneumatic valve 2; Spring reset quickens fast open procedure simultaneously, and valve is opened fast.
3, pressurized air emergency operating mode:
After pressure switch 6 is connected on filtering pressure reducing valve 7, connect, be used to monitor source of the gas 8 pressure size with the power line of solenoid valve 5.When source of the gas 8 pressure just often, pressure switch 6 is in opening state, solenoid valve 5; When source of the gas 8 underpressures, pressure switch 6 is in closed condition, solenoid valve 5 dead electricity, and the anti-asthma valve is opened fast.
Claims (5)
1. anti-surge modulating valve with speedup compensation; Comprise butterfly valve body, pneumatic actuator and pneumatic control mechanism; It is characterized in that the pneumatic control mechanism that is connected to cylinder comprises solenoid valve, valve positioner, pressure switch, two Pneumatic valves and the pipeline that is used to realize being connected; Said valve positioner all links to each other with source of the gas with solenoid valve, and is that two Pneumatic valves provide driving gas by solenoid valve; Said cylinder has two mutual disconnected cavitys at least, and one of them is for being provided with Returnning spring in another cavity of cavity; Linked to each other with the A mouth of two Pneumatic valves respectively by separately vent on two cavitys, first Pneumatic valve that joins with cavity is communicated to the P mouth of valve positioner, and second Pneumatic valve that joins with Returnning spring place cavity is communicated to the A mouth of valve positioner.
2. modulating valve according to claim 1 is characterized in that, said source of the gas links to each other with valve positioner, solenoid valve and pressure switch respectively after filtering reduction valve.
3. modulating valve according to claim 1 is characterized in that, said cylinder is a single-acting angle stroke cylinder.
4. modulating valve according to claim 1 is characterized in that, the power line of said pressure switch and solenoid valve is for connecting.
5. modulating valve according to claim 1 is characterized in that, under nominal situation: the gas through filtering pressure reducing valve is divided into two-way; One the tunnel connects the P mouth of solenoid valve, and this moment, solenoid valve was charged, and A mouth and P mouth are communicated with; R mouth and A mouth break off, and first Pneumatic valve and second Pneumatic valve are brought about the desired sensation; The A mouth of first Pneumatic valve and P mouth are communicated with, and R mouth and A mouth break off; The R mouth of second Pneumatic valve is communicated with the A mouth, and A mouth and P mouth break off; Another road gas connects the P mouth of valve positioner, and the A mouth of valve positioner is connected to first Pneumatic valve and second Pneumatic valve respectively; Under urgent anti-surge operating mode: the solenoid valve dead electricity, the A mouth of solenoid valve and R mouth are communicated with, and P mouth and A mouth break off, and first Pneumatic valve and second Pneumatic valve lose gas; The A mouth of second Pneumatic valve and R mouth break off, and P mouth and A mouth are communicated with; The A mouth of second Pneumatic valve and R mouth are communicated with; When source of the gas lost gas, pressure switch was broken off, the solenoid valve dead electricity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120463243 CN202349380U (en) | 2011-11-18 | 2011-11-18 | Surging-prevention adjusting valve with speeding-up compensation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120463243 CN202349380U (en) | 2011-11-18 | 2011-11-18 | Surging-prevention adjusting valve with speeding-up compensation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202349380U true CN202349380U (en) | 2012-07-25 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120463243 Expired - Lifetime CN202349380U (en) | 2011-11-18 | 2011-11-18 | Surging-prevention adjusting valve with speeding-up compensation |
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| Country | Link |
|---|---|
| CN (1) | CN202349380U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103470843A (en) * | 2013-08-15 | 2013-12-25 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Double-acting pneumatic actuator self-lock device |
| CN106352121A (en) * | 2016-08-30 | 2017-01-25 | 杭州方圆塑机股份有限公司 | Automatic driving device for balance valve sticking prevention |
-
2011
- 2011-11-18 CN CN 201120463243 patent/CN202349380U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103470843A (en) * | 2013-08-15 | 2013-12-25 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Double-acting pneumatic actuator self-lock device |
| CN103470843B (en) * | 2013-08-15 | 2016-01-13 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Double-action pneumatic actuator self-lock device |
| CN106352121A (en) * | 2016-08-30 | 2017-01-25 | 杭州方圆塑机股份有限公司 | Automatic driving device for balance valve sticking prevention |
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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 |
Granted publication date: 20120725 |
|
| CX01 | Expiry of patent term |