CN215170226U - Control device for bypass discharge system of steam turbine of nuclear power station - Google Patents
Control device for bypass discharge system of steam turbine of nuclear power station Download PDFInfo
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- CN215170226U CN215170226U CN202120700350.4U CN202120700350U CN215170226U CN 215170226 U CN215170226 U CN 215170226U CN 202120700350 U CN202120700350 U CN 202120700350U CN 215170226 U CN215170226 U CN 215170226U
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Abstract
The utility model relates to a controlling means for nuclear power station steam turbine bypass discharge system, include: the magnetic strip type position feedback device is fixed on the valve body through the first mounting piece; the magnetic strip is fixed on the coupler through the second mounting piece, arranged in the induction groove of the feedback device and connected with the junction box of the feedback device; a locator connected with the junction box; the first switch valve and the second switch valve are used for connecting a main gas source; the filtering pressure reducing valve is connected with the first switch valve and the air source input port of the positioner; a gas passage connecting the second switching valve and the valve cylinder; a flow amplifier connecting the gas passage with a gas output port of the positioner, the positioner configured to control its output gas flow in accordance with the feedback signal; the gas path includes a first control valve connected to the flow amplifier and open when the flow amplifier has an output, so that its gas output is input to the valve cylinder. Implement the utility model discloses system reliability can be improved.
Description
Technical Field
The utility model relates to a control system technical field, more specifically say, relate to a controlling means for nuclear power station steam turbine bypass discharge system.
Background
Currently, in a bypass exhaust system of a steam turbine of a nuclear power plant, a positioner and a position feedback device are used together to control the valve action of a regulating valve in the control process of the regulating valve. The position feedback device is generally used for feeding back valve position information through a feedback cross rod connected with the coupler in a hard connection mode, and the valve vibrates greatly when put into use, so that the position feedback device and connecting accessories of the position feedback device are prone to being affected by vibration and broken, and faults are caused.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to the above-mentioned partial technical defect of prior art, provide a controlling means for nuclear power station steam turbine bypass discharge system.
The utility model provides a technical scheme that its technical problem adopted is: a control apparatus for a nuclear power plant steam turbine bypass bleed system is constructed, comprising: the magnetic strip type position feedback device is fixed on a valve body of the steam turbine valve through a first mounting piece;
the magnetic strip is fixed on a coupler of the steam turbine valve through a second mounting piece and arranged in an induction groove of the magnetic strip type position feedback device;
the junction box is connected with the magnetic strip type position feedback device;
the locator is connected with the junction box and receives a feedback signal of the magnetic strip type position feedback device through the junction box;
the first switch valve and the second switch valve are used for connecting a main gas source;
a filter pressure reducing valve connected between the first switch valve and the air source input port of the positioner;
a gas passage connected between the second switching valve and a valve cylinder of the turbine valve;
a flow amplifier connecting the gas pathway with a gas output port of the positioner, wherein the positioner is configured to control the gas flow at its gas output port in accordance with the feedback signal;
the gas passage includes a first control valve connected to the flow amplifier for communication when the flow amplifier has an output, such that the gas output of the flow amplifier is input to the valve cylinder.
Preferably, the distance between the magnetic strip and two side walls of the induction groove in the induction groove is the same.
Preferably, the length of the working area of the magnetic strip is greater than the moving stroke of the turbine valve, and when the turbine valve is in a fully closed state and a fully opened state, the center line of the magnetic strip type position feedback device is located in the working area of the magnetic strip.
Preferably, the second installation part comprises a first connection part and a second connection part, the first extension end of the first connection part is connected with the coupler, the second extension end of the first connection part and the first extension end of the first connection part are bent in an L shape and connected with the first extension end of the second connection part, and the second extension end of the second connection part and the first extension end of the second connection part are bent in an L shape and then connected with the magnetic stripe.
Preferably, the gas passage includes a third switch valve and a first quick-opening electromagnetic valve, a first end of the third switch valve is connected to the second switch valve, a second end of the third switch valve is connected to a first end of the first quick-opening electromagnetic valve, a second end of the first quick-opening electromagnetic valve is connected to a first end of the first control valve, a third end of the first quick-opening electromagnetic valve is connected to the flow amplifier, a second end of the first control valve is connected to an output end of the flow amplifier, and a third end of the first control valve is connected to the valve cylinder.
Preferably, the first control valve comprises a solenoid valve.
Preferably, the gas passage further comprises a second quick-opening electromagnetic valve and a second control valve, the first end of the second quick-opening electromagnetic valve is connected with the second end of the first quick-opening electromagnetic valve, the second end of the second quick-opening electromagnetic valve is connected with the first end of the first control valve, and the third end of the second quick-opening electromagnetic valve is connected with the third end of the second control valve.
Preferably, the magnetic stripe type position feedback device is of model DVC6215, the positioner is of model DVC6205, the filter pressure reducing valve is of model 67CFR, and/or the flow amplifier is of model BV 2625.
Preferably, the first switching valve is of the model number GCT335VA, the second switching valve is of the model number GCT335VA, and/or the third switching valve is of the model number GCT113 FF.
Preferably, the gas outlet port of the positioner is connected to the flow amplifier by 3/8 inch tubing, and the flow amplifier is connected to the first control valve by 1/2 inch tubing. Implement the utility model discloses a controlling means for nuclear power station steam turbine bypass discharge system has following beneficial effect: and the system reliability is improved.
Drawings
The invention will be further explained with reference to the drawings and examples, wherein:
fig. 1 is a schematic structural diagram of an embodiment of the control device for a bypass exhaust system of a steam turbine of a nuclear power plant according to the present invention.
Fig. 2 is a schematic partial structural view of an embodiment of a control apparatus for a bypass bleed system of a steam turbine of a nuclear power plant according to the present invention;
fig. 3 is a schematic structural view of the mounting position of the magnetic stripe in fig. 1.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1 to 3, in a first embodiment of the present invention, a control device for a bypass exhaust system of a steam turbine in a nuclear power plant includes: a magnetic strip type position feedback device 220 fixed to the valve body 110 of the steam turbine valve by a first mounting member 210; a magnetic strip 230 fixed to the coupling 120 of the steam turbine valve by a second mounting member 240, the magnetic strip 230 being disposed in the sensing groove 210 of the magnetic strip type position feedback device 220, and a junction box 340 connected to the magnetic strip type position feedback device 220; the positioner 310 is connected with the junction box 340 and receives the feedback signal of the magnetic strip type position feedback device 220 through the junction box 340; a first switching valve 321 and a second switching valve 322 for connecting the main gas source 410; a filter pressure relief valve 330 connected between the first on-off valve 321 and the air supply input port of the positioner 310; a gas passage connected between the second switching valve 322 and the valve cylinder 420 of the turbine valve; a flow amplifier 360 connecting the gas pathway to a gas output port of the positioner 310, wherein the positioner 310 is configured to control the gas flow at its gas output port in accordance with the feedback signal; the gas path includes a first control valve 380 connected to the flow amplifier 360 for communication when the flow amplifier has an output, such that the gas output of the flow amplifier is input to the valve cylinder 420. Specifically, in the bypass discharge system of the steam turbine of nuclear power station, it installs magnetic stripe formula position feedback ware 220 on the valve body 110 of steam turbine valve through first installed part 210, install magnetic stripe 230 on the shaft coupling 120 of steam turbine valve through second installed part 240, in the installation, guarantee that magnetic stripe 230 sets up in magnetic stripe formula position feedback ware 220's induction groove 221, wherein shaft coupling 120 is connected with the valve rod of steam turbine valve, when the valve rod of steam turbine valve slides in the cylinder, it can drive shaft coupling 120 motion, shaft coupling 120 motion can drive magnetic stripe 230 and move in magnetic stripe formula position feedback ware 220's induction groove 221, magnetic stripe formula position feedback ware 220 removes the feedback signal that generates the correspondence according to magnetic stripe 230's position. The positioner 310 is connected with the magnetic stripe type position feedback device 220 through the junction box 340, and receives a feedback signal output by the magnetic stripe type position feedback device 220 through the junction box 340, the gas source input port of the positioner 310 is connected to the main gas source 410 through the first switch valve 321 and the filtering and pressure reducing valve 330, and the positioner 310 controls the internal work thereof according to the feedback signal so as to control the gas flow rate of the gas output end thereof. The main gas source 410 is also connected via the second on-off valve 322 to a gas passage connected between the second on-off valve 322 and the valve cylinder 420 of the turbine valve, which can be used to charge the valve cylinder 420 for valve actuation. The flow amplifier 360 is connected to the gas output port of the positioner 310 and the gas passage, amplifies the gas flow at the gas output port, and outputs the amplified gas to turn on the first control valve 380, and when the first control valve 380 is turned on, the amplified gas is output to the valve cylinder 420 through the gas passage via the first control valve 380, and drives the valve to perform a corresponding operation. The feedback signal is used for feeding back the position of the valve rod in the cylinder so as to finally judge the opening and closing degree of the valve, and the position of the valve rod in the cylinder so as to finally judge the opening and closing degree of the valve is obtained, so that the valve is further controlled to perform corresponding action according to the opening and closing degree. In a specific embodiment, the first mounting member 210 is a back plate structure, and the back plate is fixed to the valve body 110 by bolts, and the bolts can be fastened by thread glue. Wherein the magnetic stripe position feedback 220 may be secured to the mounting backplate by 3M 8 bolts, the mounting backplate secured to the valve body 110 by 4 5/16 bolts, the mounting backplate may be provided with two bolts using 1/2 stainless steel tubes as sleeves to be supported between the mounting backplate and the valve body 110.
Optionally, the distance between the magnetic stripe 230 and two sidewalls of the sensing slot 221 in the sensing slot 221 is the same. Specifically, when the magnetic stripe 230 is installed in the sensing slot 221 of the magnetic stripe type position feedback device 220, the magnetic stripe 230 does not scratch the sensing slot 221, and the distance between the magnetic stripe 230 and the sensing slot 221 is moderate, for example, the magnetic stripe can be disposed in the middle of the sensing slot 221, so that the gaps between the two sidewalls of the sensing slot 221 and the magnetic stripe 230 are equal or approximately equal.
Optionally, the length of the working area of the magnetic stripe 230 is greater than the moving stroke of the turbine valve, and when the turbine valve is in a fully closed state and a fully opened state, the center line of the magnetic stripe type position feedback 220 is located in the working area of the magnetic stripe 230. Specifically, in order to guarantee that the whole stroke of turbine valve can be monitored, wherein the working area length of magnetic stripe sets up will be greater than the removal stroke of turbine valve, simultaneously in the magnetic stripe installation, guarantee that the valve is under any aperture, and magnetic stripe formula feedback ware induction zone does not all exceed the working area of magnetic stripe, is in at the turbine valve promptly and closes completely and open two kinds of extreme condition under, and the central line of magnetic stripe formula position feedback ware 220 all is in the working area of magnetic stripe 230.
Optionally, the second mounting element 240 includes a first connecting portion 241 and a second connecting portion 242, the first extending end of the first connecting portion 241 is connected to the coupler 120, the second extending end of the first connecting portion 241 and the first extending end thereof are bent in an L shape and connected to the first extending end of the second connecting portion 242, and the second extending end of the second connecting portion 242 and the first extending end thereof are bent in an L shape and then connected to the magnetic stripe 230. Specifically, the second mounting member 240 for mounting the magnetic stripe 230 may be composed of a first connection portion 241 and a second connection portion 242, wherein the first connection portion 241 is connected to the coupler 120, extends in an L-shape in space, and is connected to the second connection portion 242 at an extending end. The first connection portion 241 extends in a direction away from the valve body to prevent the installed magnetic stripe 230 from interfering with the valve body 110, and the second connection portion 242 connects the magnetic stripe 230 and the first connection portion 241, which can be used to finely adjust the position of the magnetic stripe 230, so that the magnetic stripe 230 can just be in the sensing slot 221 of the magnetic stripe type position feedback device 220. The second connection portion 242 may have an L-shaped bent shape on a plane.
Optionally, the gas passage includes a third on-off valve 323 and a first quick-opening solenoid valve 350, a first end of the third on-off valve 323 is connected to the second on-off valve 322, a second end of the third on-off valve 323 is connected to a first end of the first quick-opening solenoid valve 350, a second end of the first quick-opening solenoid valve 350 is connected to a first end of the first control valve 380, a third end of the first quick-opening solenoid valve 350 is connected to the flow amplifier, a second end of the first control valve 380 is connected to an output end of the flow amplifier 360, and a third end of the first control valve 380 is connected to the valve cylinder 420. Specifically, a third switch valve 323 connected with the second switch valve 322 is arranged on the gas passage, data of the third switch valve 323 is split by the first quick-opening electromagnetic valve 350, one end of the third switch valve is input and connected with the flow amplifier 360 to assist the flow amplifier 360 in amplifying the output flow of the positioner 310, the second switch valve 322 may be a gas path isolation valve, and the third switch valve 323 may be a filtering and pressure reducing valve to realize the function of reducing pressure and filtering the gas source pressure. And then connected to the first quick-opening solenoid valve 350, wherein the first quick-opening solenoid valve 350 is used for forming a quick-opening loop connected to the valve cylinder 420, when the solenoid valve of the first quick-opening solenoid valve 350 is excited, the quick-opening loop is selected, and the air source directly passes through the first quick-opening solenoid valve 350 and then reaches the valve membrane head without passing through the positioner 310, so that the quick-opening function of the valve is realized.
Wherein the first control valve 380 comprises a solenoid valve. That is, the output of the flow amplifier can enter the cylinder by the electromagnetic valve triggering conduction.
Optionally, the gas path further includes a second quick-opening solenoid valve 370 and a second control valve 390, a first end of the second quick-opening solenoid valve 370 is connected to a second end of the first quick-opening solenoid valve 350, a second end of the second quick-opening solenoid valve 370 is connected to a first end of the first control valve 380, and a third end of the second quick-opening solenoid valve 370 is connected to a third end of the second control valve 390. The connection of the second quick opening solenoid valve 370 to two solenoid valves in series that allow valve actuation, namely the first control valve 380 and the second control valve 390, provides a redundant function that allows a switching action when both solenoid valves are energized simultaneously.
Optionally, the magnetic stripe position feedback device 220 is model DVC6215, the positioner 310 is model DVC6205, the filter and pressure relief valve is model 67CFR, and/or the flow amplifier 360 is model BV 2625. The magnetic stripe type position feedback device adopts DVC6215, adopts non-contact position induction and can effectively solve the reliability problem caused by vibration. The filter pressure reducing valve 67CFR is directly mounted on the positioner DVC6205, an O-ring is arranged in the middle of mounting to improve sealing performance, and meanwhile, lubricating oil can be coated on the O-ring, and a useless OUT port of the filter pressure reducing valve 67CFR is blocked, for example, by using an 1/4NPT plug.
Optionally, the first switch valve 321 has a model number of GCT335VA, the second switch valve 322 has a model number of GCT335VA, and/or the third switch valve 323 has a model number of GCT113 FF. Specifically, the type of one or more of the first switching valve 321, the second switching valve 322, and the third switching valve 323 may be used.
Optionally, the gas outlet port of the positioner is connected to the flow amplifier via 3/8 inch tubing, and the flow amplifier is connected to the first control valve via 1/2 inch tubing. In particular, different conduits may be employed therein for different gas flows. In one embodiment, a total source gas supply pressure of 4.5Barg may be set.
It is to be understood that the foregoing examples merely represent preferred embodiments of the present invention, and that the description thereof is more specific and detailed, but not intended to limit the scope of the invention; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims (10)
1. A control apparatus for a nuclear power plant steam turbine bypass bleed system, comprising: the magnetic strip type position feedback device is fixed on a valve body of the steam turbine valve through a first mounting piece;
the magnetic strip is fixed on a coupler of the steam turbine valve through a second mounting piece and arranged in an induction groove of the magnetic strip type position feedback device;
the junction box is connected with the magnetic strip type position feedback device;
the locator is connected with the junction box and receives a feedback signal of the magnetic strip type position feedback device through the junction box;
the first switch valve and the second switch valve are used for connecting a main gas source;
a filter pressure reducing valve connected between the first switch valve and the air source input port of the positioner;
a gas passage connected between the second switching valve and a valve cylinder of the turbine valve;
a flow amplifier connecting the gas pathway with a gas output port of the positioner, wherein the positioner is configured to control the gas flow at its gas output port in accordance with the feedback signal;
the gas passage includes a first control valve connected to the flow amplifier for communication when the flow amplifier has an output, such that the gas output of the flow amplifier is input to the valve cylinder.
2. The control apparatus for the nuclear power plant steam turbine bypass vent system according to claim 1, wherein the magnetic strip is spaced apart from both sidewalls of the induction tank by the same distance within the induction tank.
3. The control device for the bypass emission system of a steam turbine of a nuclear power plant according to claim 1, wherein the length of the working area of the magnetic strip is greater than the moving stroke of the steam turbine valve, and when the steam turbine bypass valve is in a fully closed state and a fully open state, the magnetic force receiving area of the magnetic strip type position feedback device is located in the working area of the magnetic strip, so that the magnetic signal receiving of the position feedback device is continuous in the valve action process.
4. The control device for the bypass exhaust system of the steam turbine of the nuclear power plant according to claim 1, wherein the second mounting member includes a first connecting portion and a second connecting portion, a first extending end of the first connecting portion is connected to the coupler, a second extending end of the first connecting portion and a first extending end thereof are bent in an L shape and connected to a first extending end of the second connecting portion, and a second extending end of the second connecting portion and the first extending end thereof are bent in an L shape and then connected to the magnetic stripe.
5. The control apparatus for the bypass emission system of a steam turbine in a nuclear power plant according to claim 1, wherein the gas path includes a third on/off valve and a first quick opening solenoid valve, a first end of the third on/off valve is connected to the second on/off valve, a second end of the third on/off valve is connected to a first end of the first quick opening solenoid valve, a second end of the first quick opening solenoid valve is connected to a first end of the first control valve, a third end of the first quick opening solenoid valve is connected to the flow amplifier, a second end of the first control valve is connected to an output end of the flow amplifier, and a third end of the first control valve is connected to the valve cylinder.
6. The control apparatus for a nuclear power plant steam turbine bypass discharge system according to claim 5, wherein the first control valve includes a solenoid valve.
7. The control apparatus for the bypass emission system of a steam turbine of a nuclear power plant according to claim 5, wherein the gas path further includes a second quick-opening solenoid valve and a second control valve, a first end of the second quick-opening solenoid valve is connected to a second end of the first quick-opening solenoid valve, a second end of the second quick-opening solenoid valve is connected to a first end of the first control valve, and a third end of the second quick-opening solenoid valve is connected to a third end of the second control valve.
8. The control apparatus for a nuclear power plant steam turbine bypass vent system according to claim 1, wherein the magnetic strip position feedback is of the type DVC6215, the positioner is of the type DVC6205, the filter and pressure relief valve is of the type 67CFR, and/or the flow amplifier is of the type BV 2625.
9. The control apparatus for a nuclear power plant steam turbine bypass emission system according to claim 5, wherein the first switching valve is of the type GCT335VA, the second switching valve is of the type GCT335VA, and/or the third switching valve is of the type GCT113 FF.
10. The control apparatus for a nuclear power plant steam turbine bypass discharge system according to claim 1, wherein the gas outlet port of the positioner is connected to the flow amplifier by 3/8 inch piping, and the flow amplifier is connected to the first control valve by 1/2 inch piping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120700350.4U CN215170226U (en) | 2021-04-06 | 2021-04-06 | Control device for bypass discharge system of steam turbine of nuclear power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120700350.4U CN215170226U (en) | 2021-04-06 | 2021-04-06 | Control device for bypass discharge system of steam turbine of nuclear power station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215170226U true CN215170226U (en) | 2021-12-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120700350.4U Active CN215170226U (en) | 2021-04-06 | 2021-04-06 | Control device for bypass discharge system of steam turbine of nuclear power station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215170226U (en) |
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2021
- 2021-04-06 CN CN202120700350.4U patent/CN215170226U/en active Active
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