CN113217645A - Anti-surge valve and anti-surge regulating valve control system - Google Patents
Anti-surge valve and anti-surge regulating valve control system Download PDFInfo
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- CN113217645A CN113217645A CN202110469437.XA CN202110469437A CN113217645A CN 113217645 A CN113217645 A CN 113217645A CN 202110469437 A CN202110469437 A CN 202110469437A CN 113217645 A CN113217645 A CN 113217645A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
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Abstract
The invention provides an anti-surge valve and an anti-surge regulating valve control system, wherein the anti-surge valve comprises a valve body, a valve seat and a sleeve, and a flow passage comprising an air inlet channel and an air outlet channel is formed in the valve body; an upward valve cavity is arranged between the air inlet channel and the air outlet channel, and the valve seat is positioned at the bottom of the valve cavity and is fixed in the valve body; the sleeve is cylindrical and is sleeved at the top of the valve seat, the top of the sleeve is provided with a valve cover, the valve cover is fixed on the valve body, a valve core is arranged in the sleeve, a valve rod is fixed on the valve core, and the top of the valve rod penetrates out of the valve cover. The anti-surge valve has the advantages of good sealing performance, good stability and low noise, can avoid the surge of the compressor, can realize the accurate adjustment of small opening and can realize the quick discharge of large opening. The anti-surge regulating valve control system can realize quick regulation and quick opening of the anti-surge valve. Meanwhile, the protection of the anti-surge valve for air source interruption, signal interruption and power supply interruption can be realized. The configuration of the flow regulating valve is increased, and the working stability of the large-size amplifier is effectively improved.
Description
Technical Field
The invention belongs to the field of surge control technology, and particularly relates to an anti-surge valve and an anti-surge regulating valve control system.
Background
Anti-surge valves are used primarily in compressors where process conditions can produce surge conditions characterized by rapid blow-back (e.g., in milliseconds), excessive vibration, and/or an increase in temperature and/or noise. In addition, surge can cause compressor or control system failure, shutdown. Anti-surge control valves are used to counteract surge. These valves must respond quickly to regulate the flow of the medium to eliminate the surge condition and ensure stable operation of the compressor system. Therefore, the anti-surge valve can effectively prevent the surging phenomenon of the centrifugal compressor. The action speed and the response speed are important indexes for measuring the performance of the anti-surge valve.
Disclosure of Invention
The invention aims to provide an anti-surge valve and an anti-surge regulating valve control system, which can realize flow regulation on a medium to eliminate a surge condition and ensure stable operation of a compressor system.
The technical scheme for solving the technical problems is as follows: an anti-surge valve comprises a valve body, a valve seat and a sleeve, wherein a flow passage is formed in the valve body and comprises an air inlet channel on one side and an air outlet channel on the other side; an upward valve cavity is arranged between the air inlet channel and the air outlet channel, and the valve seat is positioned at the bottom of the valve cavity and fixed in the valve body; the sleeve is cylindrical and is sleeved on the top of the valve seat, a valve cover is arranged on the top of the sleeve and is fixed on the valve body, a valve core is arranged in the sleeve, a valve rod is fixed on the valve core, and the top of the valve rod penetrates out of the valve cover.
The invention is further provided that a Lip-Seal sealing ring is arranged between the valve seat and the valve body.
The invention is further provided that the valve body and the valve cover are connected and fastened through a stud and a hexagon nut.
The invention is further provided that a stuffing box assembly is arranged between the valve rod and the valve cover, a gasket is arranged at the bottom of the stuffing box assembly, a stuffing pressing sleeve is arranged at the top of the stuffing box assembly, and the stuffing pressing sleeve is upwards provided with a stuffing pressing plate, a disc spring and a disc spring pressing cover in sequence and is connected and fastened through a stud and a hexagon nut.
The invention is further provided that the valve core is in a bowl shape, the side surface of the valve core is provided with a Lip-Seal sealing ring which is in contact with the sleeve, and a valve core cover plate is fixed on the top opening.
The invention is further arranged in that the bottom of the valve rod is in threaded connection with the valve core and is reversely screwed and fixed through a hexagonal thin nut.
The invention is further provided that the diameter of the valve rod located in the valve core is smaller than the diameter of the valve rod located above the valve core, and the bottom surface of the valve rod located above is in surface contact with the valve core.
The invention is further configured that a plurality of window structures are arranged on the sleeve in a surrounding manner, and a plurality of small hole structures are arranged below the window structures.
The invention is further configured such that the CV value (i.e., Q/Q) of the anti-surge valveMAX) The rate of change with stroke formula is as follows:
in the formula:
the corresponding flow at the stroke of Q-l;
qmax-the maximum flow corresponding to the maximum stroke L;
r-tunable ratio (referring to the ratio between the maximum controllable flow and the minimum controllable flow);
l-maximum stroke;
l-relative stroke.
The invention further provides an anti-surge regulating valve control system, which comprises the anti-surge valve of any one of claims 1 to 8, and further comprises a filtering pressure reducing valve A, a positioner, a position retaining valve, an electromagnetic valve, an amplifier, a flow regulating valve, a pneumatic control valve, a limit switch, a manual ball valve, a filtering pressure reducing valve B, an air storage tank, a one-way valve, an air source ball valve and a pneumatic actuating mechanism;
the air source ball valve is connected with the one-way valve, the one-way valve is connected with the filtering and reducing valve A, the filtering and reducing valve A is connected with the position retaining valve, the position retaining valve is connected with the electromagnetic valve and the positioner, the positioner is connected with the two amplifiers, each amplifier is connected with one pneumatic control valve, the electromagnetic valve is connected with the pneumatic control valve, the pneumatic control valve is also connected with the pneumatic actuating mechanism, the pneumatic actuating mechanism is connected with the limit switch, the pneumatic actuating mechanism is connected with the manual ball valve, and the pneumatic actuating mechanism is connected with the anti-surge valve;
the amplifier is connected with the filtering and pressure reducing valve B, the filtering and pressure reducing valve B is connected with the air storage tank, and the air storage tank is connected with the one-way valve.
The invention is further configured such that the air supply ball valve is connected to the outlet end of the compressor.
The invention is further provided that the positioner is connected with a DCS control chamber, and the DCS control chamber is used for outputting control signals to the positioner.
The amplifier is a gas source signal amplifying device which can receive the output pressure of the positioner, input a large flow gas source to the actuating mechanism at the same pressure and accelerate the action speed of the regulating valve.
The limit switch is an electrical switch used for limiting the movement limit position of the mechanical equipment, and the switch position of the valve can be fed back to the control end.
Pneumatic actuators, referred to as pneumatic heads for short, include diaphragm, piston, fork and rack and pinion, commonly used piston, such as air cylinders.
Compared with the prior art, the anti-surge valve has the following beneficial effects:
(1) and a Lip-Seal sealing ring is arranged to ensure the sealing property of the anti-surge valve.
(2) A plane is arranged at the bottom of the ladder of the valve rod and matched with the valve core, the concentricity of the valve rod and the valve core is guaranteed, and the valve rod has higher strength than a common valve rod structure.
(3) The case flip-chip saves space, and the sealing washer on case apron and the case forms the middle part direction, compares with traditional structure, has better guidance quality, very big reinforcing the stability of anti-surge valve fast action.
(4) The flow outlet of the sleeve is divided into an upper part and a lower part which comprise a window type structure and a small hole type structure. Compared with the traditional sleeve, the sleeve has the performance of both a low-noise sleeve and a window-type sleeve, and when the valve works, the flow under the normal working condition is controlled by the lower part of the sleeve in a porous mode, so that the noise generated when a medium flows can be effectively reduced; when the pressure of the upstream of the valve fluctuates, the flow window at the upper part of the sleeve is involved in working, the upstream pressure of the valve is quickly released, and the surge phenomenon of the compressor is avoided.
(5) According to CV value (i.e., Q/Q)MAX) The requirement of the surge working condition of the centrifugal compressor can be met according to the stroke change rate formula: the small opening degree is accurately adjusted, and the large opening degree is quickly released.
Compared with the prior art, the anti-surge regulating valve control system has the following advantages: the anti-surge valve can be quickly adjusted within 2 seconds and quickly opened within 1.5 seconds. Meanwhile, the protection of the anti-surge valve for air source interruption, signal interruption and power supply interruption can be realized. The configuration of the flow regulating valve is increased, and the working stability of the large-size amplifier is effectively improved.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic view of the structure within the sleeve;
FIG. 3 is an enlarged view of the contact structure of the valve body and the valve cartridge;
FIG. 4 is a schematic structural view of the sleeve;
FIG. 5 is a flow rate characteristic table;
fig. 6 is a schematic view of the connection structure of the present invention.
In fig. 1-4, 1, valve body; 2. a valve seat; 3. Lip-Seal ring; 4. a sleeve; 5. a valve core; 6. Lip-Seal ring; 7. a valve core cover plate; 8. a socket head cap screw; 9. a lock washer; 10. a gasket; 11. a valve cover; 12. a stud; 13. a hexagonal nut; 14. a liner; 15. a stuffing box assembly; 16. pressing and sleeving the filler; 17. a packing press plate; 18. a disc spring; 19. a disc spring gland; 20. a valve stem; 21. a stud; 22. a hexagonal nut; 23. a hexagonal thin nut; 24. a window-type structure; 25. a small hole type structure.
In FIG. 6, 1-1, filter pressure reducing valve A; 1-2, a positioner; 1-3, a position-keeping valve; 1-4, an electromagnetic valve; 1-5, an amplifier; 1-6, a flow regulating valve; 1-7, a pneumatic control valve; 1-8, limit switch; 1-9, manual ball valve; 1-10, anti-surge valves; 1-11, a filtering pressure reducing valve B; 1-12 parts of an air storage tank; 1-13, a one-way valve; 1-14, an air source ball valve; 1-15 and a pneumatic actuator.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides an anti-surge valve, which comprises a valve body 1, a valve seat 2 and a sleeve 4, wherein a flow passage is formed in the valve body 1, and the flow passage comprises an air inlet channel on one side and an air outlet channel on the other side, as one embodiment, referring to fig. 1 and 2. An upward valve cavity is arranged between the air inlet channel and the air outlet channel, and the valve seat 2 is positioned at the bottom of the valve cavity and fixed in the valve body 1. The sleeve 4 is cylindrical, is sleeved on the top of the valve seat 2, is suspended on a flange in the valve body 1 and is provided with a gasket 10, the top end of the sleeve is tightly pressed and fixed by a valve cover 11, the bottom of the valve seat 2 is sealed with an inner hole of the valve body 1 through a Lip-Seal sealing ring 3, and the valve body 1 and the valve cover 11 are connected and fastened with a hexagon nut 13 through a stud 12. The valve rod 20 and the valve core 5 are connected into a whole, the valve rod 20 penetrates through an inner hole of the valve cover 11, the valve rod 20 and the valve cover 11 are sealed through a stuffing box assembly 15, a gasket 14 is arranged at the bottom of the stuffing box assembly 15, a stuffing pressing sleeve 16 is arranged at the top of the stuffing box assembly 15, and the stuffing pressing sleeve 16 is upwards sequentially provided with a stuffing pressing plate 17, a disc spring 19 and a disc spring pressing cover 20 and is connected and fastened through a stud bolt 21 and a hexagon nut 22. When the valve works, a medium flows in from the left side of the valve body 1 and flows out from the right side of the valve body 1 after flowing through the window of the sleeve 4, and the valve core 5 reciprocates up and down in the sleeve 4, so that the size of the effective sectional area of the flow window of the sleeve 4 can be changed, and the adjustment of the medium flow is realized. After the valve core 5 and the valve rod 20 are connected, the valve core and the valve rod reciprocate up and down in the sleeve 4, and the Lip-Seal sealing ring 3 is tightly attached to the inner wall of the sleeve 4 to form sealing.
The valve rod 20 is of a stepped structure, the diameter of the valve rod 20 located in the valve core 5 is smaller than that of the valve rod 20 located above the valve core 5, the bottom surface of the valve rod 20 located above is in surface contact with the valve core 5, a plane C is arranged at the bottom of the step and is matched with the valve core 5, concentricity with the valve core 5 is guaranteed, and the valve rod 20 has higher strength than a common valve rod 20 structure. The valve rod 20 is connected with the bottom of the valve core 5 through threads, and is reversely screwed and fixed through a hexagonal thin nut 23 after the connection.
Referring to fig. 1-3, the upside-down opening of the valve core 5 is upward, the bottom edge of the valve core 5 is a small conical surface a, the inner side edge of the top of the valve seat 2 is provided with a curved surface B, the connecting position of the valve core 5 and the valve rod 20 moves downwards, and the conical surface a is flush with the curved surface B to form a tight sealing surface. Meanwhile, a valve core cover plate is arranged on an opening in the top of the valve core and is fixed with the anti-loosening gasket through a hexagon socket head cap screw, a Lip-Seal sealing ring 6 in contact with the sleeve is arranged on the side face of the valve core, and the Lip-Seal sealing ring 6 and the valve core cover plate 7 form middle guide.
Referring to fig. 4, the flow outlet of the sleeve 4 is divided into an upper part and a lower part, the upper part is provided with a plurality of window-type structures, and the lower part is provided with a plurality of small-hole-type structures. Compared with the traditional sleeve, the sealing pair has the advantages that: the valve has the performance of a low-noise sleeve and a window-type sleeve, and when the valve works, the flow under the normal working condition is controlled by the lower part of the sleeve 4 in a porous mode, so that the noise generated when a medium flows can be effectively reduced; when the pressure on the upstream of the valve fluctuates, the flow window on the upper part of the sleeve 4 is involved in working, the upstream pressure of the valve is quickly released, and the surge phenomenon of the compressor is avoided.
The flow characteristic curve of the regulating valve is generally divided into two types of percentage and linear, and of course, certain valves with certain structures have inherent flow characteristics, such as butterfly valves and the like which have approximately linear characteristics, and V-shaped ball valves and the like which have approximately equal percentage inherent characteristics. The flow curve of the valve with inherent characteristics is difficult to change on the valve structure.
The flow characteristic is the relationship between the relative flow and the relative opening degree of the valve under the condition that the pressure difference is not changed. And is typically expressed using an inherent formula.
Q/Qmax＝F(l/L)……R＝Qmax/Qmin＝Kv max/(Kv min)
The adjustable ratio R refers to the ratio between the maximum controllable flow and the minimum controllable flow, and is the flow adjusting range and capacity of one valve.
The linear flow characteristic curve formula is as follows:
Q/Qmax＝1/R[1+(R-1)/L]；
the equal percentage flow characteristic curve formula is as follows:
Q/Qmax＝R(1/L-1)；
from this formula, it can be seen that the flow rate of the linear characteristic curve is proportional to the opening degree, and is in a linear relationship. The equal percentage flow characteristic curve and the opening degree logarithmic characteristic are also called logarithmic curves.
The parabolic formula is as follows:
the principle is as follows: the change in relative travel causes the change in relative flow to be proportional to the square of the relative flow at that point. The adjustability of this curve is between linear and equal percentages, but still does not fully meet the requirements of anti-surge conditions.
CV values (i.e., Q/Q) of the anti-surge valves 1-10 of the present inventionMAX) The rate of change with stroke formula is as follows:
in the formula: the corresponding flow at the stroke of Q-l; qmax-the maximum flow corresponding to the maximum stroke L; r-tunable ratio (referring to the ratio between the maximum controllable flow and the minimum controllable flow); l-maximum stroke; l-relative stroke.
Referring to fig. 5, Linear and equal percentage EQ% are two valve flow characteristics commonly used in the market today. The parabolic characteristic is between Linear and equal percentage EQ%, and these three are fixed and not serviced for a certain condition. The applicable mode can be selected according to the working condition, but the whole application can not be achieved.
Requirement of surge condition of centrifugal compressor: the small opening degree is accurately adjusted, and the large opening degree is quickly released.
CV values (i.e., Q/Q) according to the inventionMAX) According to a change rate formula of the stroke, compared with an improved Linear curve (M-Linear) in the graph 5, the improved Linear curve is more suitable for an equal percentage curve when the opening degree is small (within 30%), accurate adjustment is achieved, the improved Linear curve is closer to the Linear curve when the opening degree is large (30% -70%), rapid discharge is achieved, 100% applicability is achieved, and the requirement of the surge working condition of the centrifugal compressor can be met. The shape of the throttling surface of the valve internals can be designed according to the formula, so that the actual flow characteristic curve of the anti-surge valve 1-10 is matched with the curve formed by the formula, and the optimization of the adjusting performance of the anti-surge valve 1-10 is realized.
The invention further provides an anti-surge valve control system, which is shown in figure 6 and comprises a filtering pressure reducing valve A1-1, a positioner 1-2, a position retaining valve 1-3, an electromagnetic valve 1-4, an amplifier 1-5, a flow regulating valve 1-6, an air control valve 1-7, a limit switch 1-8, a manual ball valve 1-9, an anti-surge valve 1-10, a filtering pressure reducing valve B1-11, an air storage tank 1-12, a check valve 1-13, an air source ball valve 1-14 and a pneumatic actuator 1-15. The air source ball valve 1-14 is connected with a one-way valve 1-13, the one-way valve 1-13 is connected with a filtering pressure reducing valve A1-1, the filtering pressure reducing valve A1-1 is connected with a position retaining valve 1-3, the position retaining valve 1-3 is connected with an electromagnetic valve 1-4 and a positioner 1-2, the positioner 1-2 is connected with a DCS control chamber, the DCS control chamber is used for outputting control signals to the positioner 1-2, the positioner 1-2 is also connected with two amplifiers 1-5, each amplifier 1-5 is connected with a pneumatic control valve 1-7, the electromagnetic valve 1-4 is connected with a pneumatic control valve 1-7, the pneumatic control valve 1-7 is also connected with a pneumatic actuating mechanism 1-15, the pneumatic actuating mechanism 1-15 is connected with a limit switch 1-8, the pneumatic actuating mechanism 1-15 is connected with a manual ball valve 1-9, the pneumatic actuators 1-15 are connected to anti-surge valves 1-10. The amplifier 1-5 is connected with a filtering pressure reducing valve B1-11, the filtering pressure reducing valve B1-11 is connected with an air storage tank 1-12, and the air storage tank 1-12 is connected with a one-way valve 1-13. The air supply ball valves 1-14 are connected to the outlet end of the compressor.
The working principle is as follows: when the device works normally, the filtering pressure reducing valve A1-1 supplies air to the positioner 1-2, the position retaining valve 1-3 and the electromagnetic valve 1-4. The electromagnetic valves 1-4 are excited to control the opening of the pneumatic control valves 1-7. The air source sequentially passes through a filtering pressure reducing valve B1-11, an amplifier 1-5 and an air control valve 1-7 to enter a pneumatic actuator 1-15, and then drives an anti-surge valve 1-10 to work. The limit switches 1-8 detect the motion amplitude of the pneumatic actuating mechanisms 1-15, indirectly detect the opening and closing positions of the anti-surge valves 1-10 and feed back the opening and closing positions to the control room.
In the process, the positioner 1-2 receives a 4-20mA control signal sent by the DCS control room, the opening degree of the amplifier 1-5 is adjusted, the air flow passing through the amplifier 1-5 is controlled, the flow regulating valve 1-6 can realize micro-adjustment, and the sensitivity of the amplifier 1-5 is controlled.
It is assumed that the pneumatic actuators 1 to 15 use air cylinders. The manual ball valve 1-9 is closed at ordinary times, and is opened during manual operation to balance the pressure of the upper cavity and the lower cavity of the cylinder; the air storage tanks 1-12 are used for supplying air to the lower cavity of the air cylinder and pushing the valve to open when an air source fails; the one-way valves 1-13 prevent the gas backflow of the gas storage tank when the gas source fails; the air supply ball valves 1-14 are used for switching the air supply of the whole air circuit.
And in an emergency working condition, cutting off the 1-44-20 mA control signal of the electromagnetic valve and controlling the 1-7 of the pneumatic control valve to be closed. The air source sequentially passes through the filtering pressure reducing valve B1-11 and the pneumatic control valve 1-7 (can reverse flow), then enters the air cylinder of the anti-surge valve 1-10, and controls the actuating mechanism to move upwards to drive the anti-surge valve 1-10 to be rapidly opened.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An anti-surge valve comprises a valve body, a valve seat and a sleeve, and is characterized in that a flow passage is formed in the valve body and comprises an air inlet channel on one side and an air outlet channel on the other side; an upward valve cavity is arranged between the air inlet channel and the air outlet channel, and the valve seat is positioned at the bottom of the valve cavity and fixed in the valve body; the sleeve is cylindrical and is sleeved on the top of the valve seat, a valve cover is arranged on the top of the sleeve and is fixed on the valve body, a valve core is arranged in the sleeve, a valve rod is fixed on the valve core, and the top of the valve rod penetrates out of the valve cover.
2. The anti-surge valve of claim 1, wherein the valve body and the valve cover are fastened together by a stud and a hex nut, and the bottom of the valve stem and the valve core are threaded and secured by a hex nut.
3. The anti-surge valve according to claim 1, wherein a stuffing box assembly is arranged between the valve rod and the valve cover, a gasket is arranged at the bottom of the stuffing box assembly, a stuffing pressing sleeve is arranged at the top of the stuffing box assembly, and a stuffing pressing plate, a disc spring and a disc spring pressing cover are sequentially arranged on the stuffing pressing sleeve upwards and are connected and fastened through a stud bolt and a hexagon nut.
4. The anti-surge valve of claim 1, wherein a Lip-Seal is provided between said valve seat and said valve body; the valve core is in a bowl shape, a Lip-Seal sealing ring in contact with the sleeve is arranged on the side face of the valve core, and a valve core cover plate is fixed on the top opening.
5. The anti-surge valve of claim 1, wherein the diameter of said stem within said spool is smaller than the diameter of said stem above said spool, the bottom surface of said stem above being in face contact with said spool.
6. The antisurge valve of claim 1 wherein said sleeve has a plurality of window-like structures formed therearound and a plurality of orifice-like structures formed thereunder.
7. The anti-surge valve according to any of claims 1-6, wherein the rate of change of the CV value of the anti-surge valve with stroke is formulated as follows:
in the formula:
the corresponding flow at the stroke of Q-l;
qmax-the maximum flow corresponding to the maximum stroke L;
r-tunable ratio (referring to the ratio between the maximum controllable flow and the minimum controllable flow);
l-maximum stroke;
l-relative stroke.
8. An anti-surge regulating valve control system is characterized by comprising the anti-surge valve of any one of claims 1 to 6, and further comprising a filtering pressure reducing valve A, a positioner, a position retaining valve, an electromagnetic valve, an amplifier, a flow regulating valve, a pneumatic control valve, a limit switch, a manual ball valve, a filtering pressure reducing valve B, an air storage tank, a one-way valve, an air source ball valve and a pneumatic actuating mechanism;
the air source ball valve is connected with the one-way valve, the one-way valve is connected with the filtering and reducing valve A, the filtering and reducing valve A is connected with the position retaining valve, the position retaining valve is connected with the electromagnetic valve and the positioner, the positioner is connected with the two amplifiers, each amplifier is connected with one pneumatic control valve, the electromagnetic valve is connected with the pneumatic control valve, the pneumatic control valve is also connected with the pneumatic actuating mechanism, the pneumatic actuating mechanism is connected with the limit switch, the pneumatic actuating mechanism is connected with the manual ball valve, and the pneumatic actuating mechanism is connected with the anti-surge valve;
the amplifier is connected with the filtering and pressure reducing valve B, the filtering and pressure reducing valve B is connected with the air storage tank, and the air storage tank is connected with the one-way valve.
9. The anti-surge regulator valve control system according to claim 8, wherein the air supply ball valve is connected to an outlet end of the compressor.
10. The anti-surge regulating valve control system of claim 8, wherein the positioner is connected to a DCS control chamber for outputting a control signal to the positioner.
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| CN202110469437.XA CN113217645A (en) | 2021-04-28 | 2021-04-28 | Anti-surge valve and anti-surge regulating valve control system |
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| CN202110469437.XA CN113217645A (en) | 2021-04-28 | 2021-04-28 | Anti-surge valve and anti-surge regulating valve control system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114763846A (en) * | 2022-03-11 | 2022-07-19 | 浙江永盛科技股份有限公司 | Pneumatic control quick exhaust valve capable of preventing opening degree from overshooting |
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