CN217354491U - Low-pressure valve position measuring device for steam turbine of nuclear power station - Google Patents
Low-pressure valve position measuring device for steam turbine of nuclear power station Download PDFInfo
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- CN217354491U CN217354491U CN202220141625.XU CN202220141625U CN217354491U CN 217354491 U CN217354491 U CN 217354491U CN 202220141625 U CN202220141625 U CN 202220141625U CN 217354491 U CN217354491 U CN 217354491U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The utility model relates to the technical field of steam turbine auxiliary systems, and discloses a low-pressure valve position measuring device of a steam turbine of a nuclear power station, which comprises at least one displacement sensor arranged on the outer wall surface of a low-pressure valve actuating mechanism, a feedback mechanism for feeding back the mechanical position of a valve to the displacement sensor, and a display mechanism connected with the displacement sensor and used for displaying the detection data of the displacement sensor; the feedback mechanism comprises a connecting component connected with the valve rod and a transmission component arranged on the connecting component and used for transmitting the valve rod to move; the displacement sensor comprises a sensor main body and a magnetic ring which is connected to the sensor main body in a sliding manner; the transmission piece is connected with the magnetic ring to drive the magnetic ring to move on the sensor main body synchronously with the valve rod, and the sensor main body induces the motion state of the magnetic ring; the transmission part drives the magnetic ring to move synchronously with the valve rod on the sensor main body, so that the valve position of the low-pressure valve is measured, the valve position of the low-pressure valve is reliably and accurately measured, and the sensor is simple in overall structure and easy to operate.
Description
Technical Field
The utility model relates to a steam turbine auxiliary system technical field especially relates to a nuclear power station steam turbine low pressure valve position of valve measuring device.
Background
The whole transformation of a certain nuclear power station is carried out, the original Alstom microgover control system is replaced by a Siemens T3000 steam turbine control/protection system, but the technical difficulty of how to realize the reliable and accurate measurement of the valve position of the low-pressure valve exists after the control system is replaced, and the defects of the original device, technology or implementation method exist: the original detection device adopts a mechanical feedback type valve position measuring device, and is not suitable for a Siemens T3000 system at present; the original mechanical feedback type valve position measuring device is a technology in the middle of the last century and has the problems of complex structure, more mechanical connections and low valve position measuring precision; at present, an LVDT (linear variable differential transformer) displacement sensor is generally adopted to directly measure a valve position, but the sensor can realize a measuring function only after proper integration, and no suitable product for measuring the valve position of the low-pressure valve of the steam turbine of the nuclear power station exists in the market at present.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to prior art's defect, provide a nuclear power station steam turbine low pressure valve position measuring device, realize that steam turbine low pressure valve position is reliable, accurate measurement, detection device overall structure is simple, easily operation.
The utility model provides a technical scheme that its technical problem adopted is: a valve position measuring device for a low-pressure valve of a steam turbine of a nuclear power station comprises at least one displacement sensor arranged on the outer wall surface of a low-pressure valve actuating mechanism, a feedback mechanism for feeding back the mechanical position of the valve to the displacement sensor, and a display mechanism connected with the displacement sensor and used for displaying the detection data of the displacement sensor;
the feedback mechanism comprises a connecting component connected with the valve rod boss and a transmission component arranged on the connecting component and used for transmitting the valve rod to move;
the displacement sensor comprises a sensor main body and a magnetic ring which is connected to the sensor main body in a sliding manner;
the transmission piece is connected with the magnetic ring to drive the magnetic ring to move on the sensor main body synchronously with the valve rod, and the sensor main body senses the motion state of the magnetic ring.
Preferably, the feedback mechanism further comprises an adjusting component for adjusting the movement direction of the transmission component, the adjusting component enables the transmission component to move along the length direction of the sensor main body, the number of the adjusting components is two, and the two adjusting components are respectively arranged at two ends of the transmission component.
Preferably, the two adjusting components are two universal joints, one universal joint connects the connecting component with one end of the transmission component, and the other universal joint connects the other end of the transmission component with the magnetic ring.
Further, preferably, the transmission member is a threaded rod.
Preferably, the displacement sensors are arranged in pairs, the corresponding transmission parts are arranged in pairs, and the two transmission parts are respectively connected with the magnetic rings on the corresponding displacement sensors to drive the magnetic rings to move synchronously with the valve rod on the corresponding sensor main bodies.
Preferably, the feedback mechanism further comprises two adjusting assemblies, the two adjusting assemblies are arranged in pairs and used for adjusting the movement directions of the corresponding two transmission members respectively, each pair of adjusting assemblies is provided with two adjusting assemblies, the two adjusting assemblies are arranged at two ends of the corresponding transmission member respectively, and the two adjusting assemblies enable the corresponding transmission members to move along the length direction of the corresponding sensor main body.
Preferably, each pair of adjusting components is two universal joints, one universal joint connects the connecting component with one end of the corresponding transmission member, and the other universal joint connects the other end of the corresponding transmission member with the corresponding magnetic ring.
Preferably, the displacement sensor further comprises an L-shaped fixed bottom plate for fixing the displacement sensor, the fixed bottom plate comprises a first folding edge and a second folding edge, the first folding edge is fixed on the outer wall surface of the low-pressure valve actuating mechanism, and two displacement sensors which are symmetrically arranged are respectively installed on two sides of the second folding edge.
Further, preferably, the displacement sensor is fixedly connected or detachably connected with the fixed bottom plate.
Further, preferably coupling assembling is the connecting plate, coupling assembling includes the perpendicular first connecting portion of connecting on the valve rod and connect in the second connecting portion of first connecting portion, the second connecting portion even with driving medium transmission is connected.
The utility model discloses following beneficial effect has: the utility model provides a nuclear power station steam turbine low pressure valve position measuring device, through setting up displacement sensor and feedback mechanism, feedback mechanism includes the coupling assembling of being connected with the valve rod and is used for transmitting the driving medium of valve rod motion, displacement sensor includes sensor main part and the magnetic ring of sliding connection in the sensor main part, the driving medium is connected with the magnetic ring and is done the motion synchronous with the valve rod in the sensor main part in order to drive the magnetic ring, the displacement that detects the magnetic ring through the sensor main part is measured with steam turbine low pressure valve position, it is reliable to realize steam turbine low pressure valve position, accurate measurement, detection device overall structure is simple, easy to operate.
Drawings
The invention will be further explained with reference to the drawings and examples, wherein:
fig. 1 is a schematic perspective view of a first embodiment of a valve position measuring device according to the present invention;
fig. 2 is a schematic perspective view of a second embodiment of the valve position measuring device according to the present invention;
FIG. 3 is a front cross-sectional view of a second embodiment of the valve position measuring device of the present invention; (ii) a
Fig. 4 is a plan view of a second embodiment of the valve position measuring device of the present invention.
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.
An element is said to be "secured to" or "disposed on" another element, either directly or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element.
The terms "upper," "lower," "left," "right," "front," "back," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like refer to an orientation or position based on the orientation or position shown in the drawings.
The terms "axial" and "radial" refer to the length of the entire device or component as "axial" and the direction perpendicular to the axial direction as "radial".
The terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "plurality" is two or more unless specifically limited otherwise.
The above terms are for convenience of description only and are not to be construed as limiting the present technical solution.
As shown in fig. 1-4, a device for measuring a valve position of a low-pressure valve of a steam turbine of a nuclear power plant comprises at least one displacement sensor 1 installed on an outer wall surface of a low-pressure valve actuating mechanism 10, a feedback mechanism 2 for feeding back a mechanical position of the valve to the displacement sensor 1, and a display mechanism 3 connected with the displacement sensor 1 and used for displaying detection data of the displacement sensor 1; the feedback mechanism 2 comprises a connecting component 21 connected with a boss of the valve rod 101 and a transmission piece 22 arranged on the connecting component 21 and used for transmitting the movement of the valve rod 101; one, 2 or even a plurality of displacement sensors 1 can be arranged, and each displacement sensor 1 comprises a sensor main body 11 and a magnetic ring 12 connected to the sensor main body 11 in a sliding manner; the transmission member 22 is connected to the magnetic ring 12 to drive the magnetic ring 12 to move on the sensor body 11 synchronously with the valve rod 101, and the sensor body 11 senses the moving state of the magnetic ring 12.
The use process of the detection device is as follows: the low-pressure valve of the steam turbine is provided with a cylindrical low-pressure valve actuating mechanism 10, a valve rod 101 which does piston motion is arranged in the low-pressure valve actuating mechanism 10, the motion state of the valve rod 101 indicates the valve position mechanical position of the valve, a displacement sensor 1 is arranged on the outer wall surface of the low-pressure valve actuating mechanism 10, the displacement sensor 1 is arranged on the outer wall surface of the low-pressure valve actuating mechanism 10 through a fixed bottom plate 4, the displacement sensor 1 and the fixed bottom plate 4 are fixedly connected or detachably connected, the displacement sensor 1 and the valve rod 101 are arranged in parallel, a magnetic ring 12 of the displacement sensor 1 and the valve rod 101 synchronously move, a connecting component 21 of a feedback mechanism 2 is vertically connected with a boss of the valve rod 101, the connecting component 21 extends from the inner part of the low-pressure valve actuating mechanism 10 to the outer wall surface, the connecting component 21 outside the low-pressure valve actuating mechanism 10 is connected with one end of a transmission piece 22, and the valve rod 101 and the transmission piece 22 are arranged in parallel, the other end of the transmission part 22 is connected with a magnetic ring 12 of the displacement sensor 1, the magnetic ring 12 is connected to a sensor main body 11 in a sliding manner, the transmission part 22 is driven to move when the valve rod 101 moves, the transmission part 22 drives the magnetic ring 12 to move on the sensor main body 11 synchronously with the valve rod 101, the sensor main body 11 senses the motion state of the magnetic ring 12 and measures real-time displacement data of the magnetic ring 12, the displacement sensor 1 is connected with a display mechanism 3, meanwhile, the displacement sensor 1 transmits the measured real-time displacement data to the display mechanism 3, the display mechanism 3 displays the structural data, the displacement data at the moment is the real-time displacement data of the low-pressure valve position of the turbine, the displacement of the magnetic ring 12 is measured through the sensor main body 11 to measure the low-pressure valve position of the turbine, the valve position of the low-pressure valve of the turbine is reliably and accurately measured, and the whole structure of the detection device is simple, the operation is easy.
The driving medium 22 can be the threaded rod, also can be pipe or cylinder, coupling assembling 21 is the connecting plate, coupling assembling 21 includes the perpendicular first connecting portion 211 of connecting on valve rod 101 and connects in the second connecting portion 212 of first connecting portion 211, first connecting portion 211 and second connecting portion 212 structure as an organic whole or fixed connection, second connecting portion 212 even is connected with driving medium 22 transmission, coupling assembling 21 and connecting plate are for dismantling to be connected or fixed connection, can dismantle the connection and can be the joint, the spiro union, connection modes such as grafting.
In embodiment 1, as shown in fig. 1, in the device for measuring a valve position of a low-pressure valve of a steam turbine, one displacement sensor 1 is provided, one corresponding transmission member 22 is provided, one end of the transmission member 22 is connected to a connection assembly 21, and the other end of the transmission member 22 is connected to a magnetic ring 12 on a displacement sensor, so as to drive the magnetic ring 12 to move synchronously with a valve rod 101 on a sensor body 11.
In embodiment 2, as shown in fig. 2 to 4, in the device for measuring a valve position of a low-pressure valve of a steam turbine, displacement sensors 1 are arranged in pairs, corresponding transmission members 22 are arranged in pairs, one end of each of the two transmission members 22 is connected to a connection assembly 21, and the other end of each of the two transmission members 22 is connected to a magnetic ring 12 on the corresponding displacement sensor 1, so as to drive the magnetic ring 12 to move synchronously with a valve rod 101 on the corresponding sensor body 11.
The feedback mechanism 2 further comprises two adjusting components 23, the adjusting components 23 are arranged in pairs and used for adjusting the movement directions of the two corresponding transmission pieces 22 respectively, two adjusting components 23 are arranged in each pair, the two adjusting components 23 are arranged at two ends of the corresponding transmission piece 22 respectively, and the two adjusting components 23 enable the corresponding transmission pieces 22 to move along the length direction of the corresponding sensor main body 11; each pair of adjusting components 23 are two universal joints, wherein one universal joint connects the connecting component 21 with one end of the corresponding transmission component 22, and the other universal joint connects the other end of the corresponding transmission component 22 with the corresponding magnetic ring 12; the setting of universal joint makes driving medium 22 be on a parallel with valve rod 101 all the time when moving, avoids leading to measuring the error because of driving medium 22 transmission direction skew, further improves and measures the accuracy.
The measuring device further comprises an L-shaped fixed base plate 4 for fixing the displacement sensors 1, the fixed base plate 4 comprises a first folded edge 41 and a second folded edge 42, the first folded edge 41 is fixed on the outer wall surface of the low valve actuating mechanism, two displacement sensors 1 which are symmetrically arranged are respectively installed on two sides of the second folded edge 42, and the displacement sensors 1 are fixedly connected with the fixed base plate 4 or detachably connected with the fixed base plate.
The displacement sensor 1, the transmission part 22 and the adjusting component 23 corresponding to the displacement sensor 1 and the connecting component 21 form a set of complete valve position measuring device, the displacement sensors 1 arranged in pairs, the transmission part 22 and the adjusting component 23 corresponding to the displacement sensors 1 are arranged in a redundant manner, namely two sets of valve position measuring devices are formed, the two sets of valve position measuring devices share one connecting component 21 and one fixed bottom plate 4, when one of the displacement sensors 1, the transmission part 22 or the adjusting component 23 has a fault, the other set of measuring device can replace the fault measuring device to complete valve position measuring work, shutdown maintenance caused by the fault is avoided, and the work efficiency is prevented from being influenced; two sets of valve position measuring devices share one connecting component 21 and one fixed bottom plate 4, so that the whole device is simpler and saves installation space.
Claims (10)
1. The device for measuring the valve position of the low-pressure valve of the steam turbine of the nuclear power station is characterized by comprising at least one displacement sensor (1) arranged on the outer wall surface of a low-pressure valve actuating mechanism (10), a feedback mechanism (2) for feeding back the mechanical position of the valve to the displacement sensor (1), and a display mechanism (3) which is connected with the displacement sensor (1) and is used for displaying the detection data of the displacement sensor (1);
the feedback mechanism (2) comprises a connecting component (21) connected with the boss of the valve rod (101) and a transmission piece (22) arranged on the connecting component (21) and used for transmitting the valve rod (101) to move;
the displacement sensor (1) comprises a sensor main body (11) and a magnetic ring (12) which is connected to the sensor main body (11) in a sliding manner;
the transmission piece (22) is connected with the magnetic ring (12) to drive the magnetic ring (12) to move on the sensor main body (11) synchronously with the valve rod (101), and the sensor main body (11) induces the movement state of the magnetic ring (12).
2. The nuclear power plant steam turbine low pressure valve position measuring device according to claim 1, characterized in that the feedback mechanism (2) further comprises an adjusting component (23) for adjusting the moving direction of the transmission member (22), the adjusting component (23) enables the transmission member (22) to move along the length direction of the sensor body (11), two adjusting components (23) are arranged, and the two adjusting components (23) are respectively arranged at two ends of the transmission member (22).
3. The device for measuring the valve position of the low-pressure valve of a steam turbine of a nuclear power plant according to claim 2, characterized in that the two adjusting components (23) are two universal joints, one universal joint connects the connecting component (21) with one end of the transmission member (22), and the other universal joint connects the other end of the transmission member (22) with the magnetic ring (12).
4. The nuclear power plant steam turbine low pressure valve position measuring device of claim 1, wherein the transmission member (22) is a threaded rod.
5. The device for measuring the valve position of the low-pressure valve of the steam turbine of the nuclear power plant as claimed in claim 1, wherein the displacement sensors (1) are arranged in pairs, the corresponding transmission members (22) are arranged in pairs, and the two transmission members (22) are respectively connected with the magnetic ring (12) on the corresponding displacement sensor (1) to drive the magnetic ring (12) to move synchronously with the valve rod (101) on the corresponding sensor body (11).
6. The nuclear power plant steam turbine low pressure valve position measuring device according to claim 5, wherein the feedback mechanism (2) further comprises two adjusting assemblies (23), the adjusting assemblies (23) are arranged in pairs and used for adjusting the movement directions of the corresponding two transmission members (22), two adjusting assemblies (23) are arranged in each pair, the two adjusting assemblies (23) are arranged at two ends of the corresponding transmission member (22), and the two adjusting assemblies (23) enable the corresponding transmission member (22) to move along the length direction of the corresponding sensor body (11).
7. The device for measuring the valve position of the low-pressure valve of a steam turbine of a nuclear power plant as claimed in claim 6, characterized in that each pair of adjusting components (23) is respectively two universal joints, one of which connects the connecting component (21) with one end of the corresponding transmission member (22), and the other universal joint connects the other end of the corresponding transmission member (22) with the corresponding magnetic ring (12).
8. The device for measuring the valve position of the low-pressure valve of the steam turbine of the nuclear power plant according to claim 5, characterized by further comprising an L-shaped fixed base plate (4) for fixing the displacement sensor (1), wherein the fixed base plate (4) comprises a first folded edge (41) and a second folded edge (42), the first folded edge (41) is fixed on the outer wall surface of the low-pressure valve actuating mechanism, and two symmetrically arranged displacement sensors (1) are respectively arranged on two sides of the second folded edge (42).
9. The nuclear power plant steam turbine low pressure valve position measuring device according to claim 8, characterized in that the displacement sensor (1) is fixedly or detachably connected with the fixed bottom plate (4).
10. The device for measuring the valve position of the low-pressure valve of the steam turbine of the nuclear power plant according to claim 1, wherein the connecting assembly (21) is a connecting plate, the connecting assembly (21) comprises a first connecting part (211) vertically connected to the valve rod (101) and a second connecting part (212) connected to the first connecting part (211), and the second connecting part (212) is in transmission connection with the transmission part (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220141625.XU CN217354491U (en) | 2022-01-19 | 2022-01-19 | Low-pressure valve position measuring device for steam turbine of nuclear power station |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220141625.XU CN217354491U (en) | 2022-01-19 | 2022-01-19 | Low-pressure valve position measuring device for steam turbine of nuclear power station |
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| CN217354491U true CN217354491U (en) | 2022-09-02 |
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| CN202220141625.XU Active CN217354491U (en) | 2022-01-19 | 2022-01-19 | Low-pressure valve position measuring device for steam turbine of nuclear power station |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115875506A (en) * | 2023-02-06 | 2023-03-31 | 泉州昆泰芯微电子科技有限公司 | Valve opening degree detection device and pipeline conveying control device |
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2022
- 2022-01-19 CN CN202220141625.XU patent/CN217354491U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115875506A (en) * | 2023-02-06 | 2023-03-31 | 泉州昆泰芯微电子科技有限公司 | Valve opening degree detection device and pipeline conveying control device |
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