CN218674252U - Steam turbine valve adjusting detection device - Google Patents
Steam turbine valve adjusting detection device Download PDFInfo
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- CN218674252U CN218674252U CN202223320295.XU CN202223320295U CN218674252U CN 218674252 U CN218674252 U CN 218674252U CN 202223320295 U CN202223320295 U CN 202223320295U CN 218674252 U CN218674252 U CN 218674252U
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- linear displacement
- steam turbine
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- displacement sensors
- piston rod
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Abstract
The utility model discloses a steam turbine valve adjusting detection device, which comprises linear displacement sensors for detecting the current valve position of the steam turbine valve adjusting, wherein each steam turbine valve is provided with at least two linear displacement sensors, namely at least two linear displacement sensors simultaneously acquire the feedback signals of the valve position of the same steam turbine valve adjusting; at least two linear displacement sensors are arranged on the same side or two sides of a piston rod of a high-speed-adjusting throttle servomotor corresponding to the current turbine throttle, the detection end of each linear displacement sensor is rotatably connected with the piston rod of the high-speed-adjusting throttle servomotor through a connecting seat, the linear displacement sensors can synchronously move along with the piston rod of the high-speed-adjusting throttle servomotor, the detection device can be used for improving the reliability and accuracy of the acquisition of valve position feedback signals of the turbine throttle, the stability of the operation of a turbine set can be improved, and the service life of each linear displacement sensor can be prolonged.
Description
Technical Field
The utility model belongs to the field of machinery, especially, relate to a steam turbine valve detection device.
Background
The steam turbine is also called a steam turbine engine and is a rotary steam power device; the rotating speed of the steam turbine, the front pressure of the steam turbine and the output power of the steam turbine are all realized by controlling the opening of the regulating valve.
Each turbine regulating valve of the unit adopts a sequence valve operation mode, namely the starting of each turbine regulating valve is started according to a certain sequence; at present, a set of valve positioners are generally used for carrying out displacement signal acquisition on feedback signals of the opening degree of a turbine regulating valve, and in actual use, if the regulating valve is closed due to the fact that the feedback signals are abnormal due to the self abnormality (such as coil disconnection or short circuit, grounding and the like) of the valve positioners, the regulating valve is closed, the operation mode of the turbine regulating valve is switched from a sequence valve to a single valve, the conditions of instability, load shedding and the like of a unit are caused, and meanwhile, the parameters such as main steam pressure, temperature, steam pocket water level and the like are abnormal, so that the safety of the unit is threatened; therefore, the problems of low reliability and high safety risk exist when a group of valve positioners are adopted to collect feedback signals of the opening degree of the adjusting valve of the steam turbine. Meanwhile, the existing valve positioner is in rigid connection with a piston rod of a high-speed-adjusting-valve servomotor corresponding to the steam turbine adjusting valve, and in actual operation, the piston rod 2 is difficult to ensure that the piston rod does not displace in the X-axis and Y-axis directions during high-speed operation, so that in the long-term operation process, the valve positioner is damaged to a certain extent, the acquisition precision and the service life of the valve positioner are influenced, and the accuracy of the feedback signal acquisition of the steam turbine adjusting valve is further influenced.
Disclosure of Invention
The utility model aims at providing a steam turbine valve adjusting detection device utilizes this detection device not only to improve the reliability and the degree of accuracy that steam turbine valve adjusting valve position feedback signal gathered, and the stability of multiplicable steam turbine unit operation and the life who improves linear displacement sensor 4.
The application provides a steam turbine regulating valve detection device, which comprises linear displacement sensors (4) for detecting the current valve position of a steam turbine regulating valve, wherein each steam turbine regulating valve is provided with at least two linear displacement sensors (4), namely the at least two linear displacement sensors (4) simultaneously acquire feedback signals of the valve position of the same steam turbine regulating valve; the linear displacement sensors (4) are arranged on the same side or two sides of a piston rod (2) of the high-speed governor servomotor (1) corresponding to the current turbine governor, the detection ends of the linear displacement sensors (4) are rotatably connected with the piston rod (2) through a connecting seat (5), and the linear displacement sensors (4) can synchronously move along with the piston rod (2); the connecting seat (5) is fixedly arranged at the top end of the piston rod (2), a universal butt joint assembly is arranged on the connecting seat (5), the universal butt joint assembly comprises a universal joint (6) and a hoop clamping piece (7) connected with the universal joint, and the detection end of the linear displacement sensor (4) is fixed through the hoop clamping piece (7).
As a preferable scheme of the application, the universal joint (6) is an existing ball joint type universal joint, the upper end of the universal joint (6) is provided with an external thread or a screw hole (61), and the lower end of the universal joint is provided with a flange plate (62).
As a preferable scheme of the application, the hoop clamping piece (7) comprises a hoop ring (71) and a connecting plate (72) connected with the flange plate (62).
As the preferable scheme of the application, a fixing groove (8) is formed in the connecting seat (5), and the universal joint (6) is fixed in the fixing groove (8) in a threaded connection or pin connection mode.
In a preferred embodiment of the present invention, the linear displacement sensor (4) is a tension type displacement sensor.
The method has the advantages that at least two linear displacement sensors 4 are adopted to simultaneously acquire feedback signals of the valve position of the same turbine valve, so that when the feedback signal acquired by one linear displacement sensor 4 is abnormal and the feedback signal acquired by the other linear displacement sensor 4 is normal, the linear displacement sensor 4 with abnormal work is indicated, the trip action of the turbine can not be controlled, the running stability of a turbine unit can be improved, the reliability of the acquisition of the feedback signals of the valve position of the turbine valve can be improved, and the abnormal linear displacement sensor 4 can be maintained under the non-stop state; simultaneously, this application passes through 2 rotatable coupling of piston rod of connecting seat 5 and high accent door servomotor 1 with this linear displacement sensor 4's sense terminal, so, can ensure linear displacement sensor 4 when Z axle direction is along with piston rod 2 synchronous motion, can realize the buffering through this swing joint point when the displacement appears in X axle or Y axle direction, avoid current rigid coupling to cause the damage to linear displacement sensor 4, the collection precision and the life of linear displacement sensor 4 have been improved.
Drawings
Fig. 1 is a schematic view of a connection structure between a steam turbine throttle detection device and a piston rod of a high-speed throttle servomotor provided by an embodiment of the present invention.
Fig. 2 is a schematic diagram of a partially enlarged structure at a in fig. 1 according to an embodiment of the present invention.
Fig. 3 is a schematic view of a connection structure between the connection seat and the universal docking assembly according to an embodiment of the present invention.
Fig. 4 is a schematic view of a connection relationship structure between the hoop fastener and the linear displacement sensor provided by the embodiment of the present invention.
Fig. 5 is a schematic bottom view of the connection seat according to the embodiment of the present invention.
Fig. 6 is a schematic structural diagram of a universal docking assembly according to an embodiment of the present invention.
Fig. 7 is a schematic structural diagram of another universal docking assembly according to an embodiment of the present invention.
Reference numerals
The high-speed adjusting door oil-operated machine comprises a high-speed adjusting door oil-operated machine 1, a piston rod 2, an adjusting door base 3, a linear displacement sensor 4, a connecting seat 5, a universal joint 6, a screw hole 61, a flange plate 62, a hoop clamping piece 7, a hoop ring 71, a connecting plate 72, a fixing groove 8 and an intermediate piece 9.
Detailed Description
In the following detailed description of the present invention, reference is made to the accompanying drawings in which the above detailed description is made to illustrate and not to limit the scope of the invention.
In the description of the present invention, it should be understood that the terms "upper end", "bottom", "upper", "lower", "outside", "inside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or mechanism referred to must have a specific orientation, be constructed in a specific orientation, or be operated, and therefore, should not be construed as limiting the present invention; meanwhile, in the description of the present invention, the meaning of "at least" includes one, two and more than two.
In the present invention, unless otherwise explicitly specified or limited, the terms "fixed", "connected", "mounted", and the like are to be understood in a broad sense, and may be, for example, fixedly connected, detachably connected, and rotatably connected, or integrally connected, directly connected, or indirectly connected through an intermediate medium; the specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.
The embodiment provides a steam turbine valve adjusting detection device, which comprises linear displacement sensors 4 for detecting the current valve positions of steam turbine valves, wherein each steam turbine valve is provided with at least two linear displacement sensors 4, namely at least two linear displacement sensors 4 simultaneously acquire feedback signals of the valve positions of the same steam turbine valve, referring to fig. 1, the embodiment is preferably provided with two linear displacement sensors 4, the two linear displacement sensors 4 are equidistantly arranged on two sides of a piston rod 2 of a high-valve-adjusting servomotor 1 corresponding to the current steam turbine valve, and the arrangement structure can enable the two linear displacement sensors 4 to receive uniform push-pull force of the piston rod 2, so that the accuracy of the two linear displacement sensors 4 in acquiring the feedback signals of the valve positions can be improved; in this embodiment, when the linear displacement sensors 4 include more than two linear displacement sensors, preferably, the linear displacement sensors 4 are uniformly and equidistantly arranged on two sides of the piston rod 2 of the high-governor servomotor 1 corresponding to the current turbine governor; in this embodiment, the shell end of linear displacement sensor 4 passes through the fixing base to be fixed in the side of ground or high accent door servomotor 1, the fixing base is the massive structure that can fix the 4 shells of linear displacement sensor, linear displacement sensor 4's sense terminal passes through connecting seat 5 and 2 rotatable coupling of piston rod, and this linear displacement sensor 4 can be along with piston rod 2 in Z axle direction synchronous motion, this embodiment can play the cushioning effect to linear displacement sensor 4 in X axle and Y axle direction with linear displacement sensor 4's sense terminal and 2 rotatable coupling's of piston rod mode, avoid under the hard existing connected mode, easily cause the problem of damage to linear displacement sensor 4 when piston rod 2 moves the in-process about at a high speed and produces the displacement in X axle or Y axle direction.
In this embodiment, preferably, the connecting base 5 is fixedly arranged at the top end of the piston rod 2 (or the door adjusting base 3) by bolts or screws, and the connecting base 5 is provided with a universal docking assembly, in this embodiment, the universal docking assembly comprises a universal joint 6 and a hoop clamping piece 7 connected thereto, and the detection end of the linear displacement sensor 4 is fixed by the hoop clamping piece 7, see fig. 2-4; in this embodiment, the universal joint 6 is an existing ball-and-socket universal joint, the upper end of the universal joint 6 is provided with an external thread or screw hole 61, the lower end of the universal joint 6 is provided with a flange plate 62, in this embodiment, it is preferable that the connection base 5 is provided with a fixing groove 8, as shown in fig. 5, the fixing groove 8 is provided with an internal thread or orifice corresponding to the external thread or screw hole 61 at the upper end of the universal joint 6, the universal joint 6 is fixed in the fixing groove 8 in a screw connection manner through the internal thread and the external thread or in a pin connection manner through the screw hole 61 and the orifice, and the lower end of the universal joint 6 is connected with the hoop clamp 7 through the flange plate 62 and the hoop clamp 7, in this embodiment, the hoop clamp 7 includes a hoop ring 71 and a connecting plate 72 connected with the flange plate 62, the hoop 71 can lock and limit the linear displacement sensor 4, in this embodiment, the hoop ring 71 is an existing double-sided hoop 71; in this embodiment, the hoop fastener 7 is directly connected to the flange 62 through a connecting plate 72, as shown in fig. 7, or the connecting plate 72 on the hoop fastener 7 is indirectly connected to the flange 62 through an i-shaped or frame-shaped intermediate member 9, as shown in fig. 6, and may be specifically selected according to the length of the linear displacement sensor 4.
In the present embodiment, the linear displacement sensor 4 is a conventional tension type displacement sensor.
The specific use principle of this embodiment includes: when a turbine governor operates normally, feedback signals of the current valve position of the turbine governor are acquired simultaneously through two linear displacement sensors 4 connected with the top of a piston rod 2 (the bottom of the governor) of a high governor throttle servomotor 1, and because the two linear displacement sensors 4 are arranged on two sides of the piston rod 2 of the high governor servomotor 1 at equal intervals, the two linear displacement sensors 4 can move synchronously and in equal displacement along with the piston rod 2 of the high governor servomotor 1, namely valve feedback signals acquired by the two linear displacement sensors 4 in a normal state are the same, when the feedback signal acquired by one linear displacement sensor 4 is abnormal and the feedback signal acquired by the other linear displacement sensor 4 is normal, the linear displacement sensor 4 with abnormal work is indicated to be out of control of the trip operation of the turbine, meanwhile, an operator can replace or maintain the abnormal linear displacement sensor 4 in a non-stop state, the trip operation of the turbine is controlled when the feedback signals acquired by the two linear displacement sensors 4 are abnormal simultaneously, the feedback signals of the same valve position of the turbine are acquired simultaneously, the reliability of the turbine governor valve position can be improved, and the reliability of the turbine can be improved when the feedback signals acquired by the turbine governor valve position and the turbine is abnormal, the turbine is maintained in the abnormal state; simultaneously, this embodiment passes through connecting seat 5 with the 2 rotatable coupling of piston rod of high accent door servomotor 1 with this linear displacement sensor 4's sense terminal, so, can ensure linear displacement sensor 4 when Z axle direction is along with piston rod 2 synchronous motion, can realize the buffering through rotatable joint point when the displacement appears in X axle or Y axle direction, avoid current rigid coupling to cause the damage to linear displacement sensor 4, improved linear displacement sensor 4's collection precision and life.
In conclusion, the detection device in the embodiment can improve the reliability and accuracy of the steam turbine valve position feedback signal acquisition, can improve the running stability of the steam turbine set and can prolong the service life of the linear displacement sensor 4.
The above description is only an example of the present invention, and the common general knowledge of the known specific structures and characteristics of the embodiments is not described herein. It should be noted that, for those skilled in the art, without departing from the scope of the present invention, several modifications can be made, which should also be considered as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of protection claimed in the present application shall be subject to the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (5)
1. The steam turbine valve adjusting detection device is characterized by comprising linear displacement sensors (4) for detecting the current valve positions of the steam turbine valves, wherein each steam turbine valve is provided with at least two linear displacement sensors (4), namely the at least two linear displacement sensors (4) simultaneously acquire feedback signals of the valve positions of the same steam turbine valve; the linear displacement sensors (4) are arranged on the same side or two sides of a piston rod (2) of the high-speed governor servomotor (1) corresponding to the current turbine governor, the detection ends of the linear displacement sensors (4) are rotatably connected with the piston rod (2) through a connecting seat (5), and the linear displacement sensors (4) can synchronously move along with the piston rod (2); the connecting seat (5) is fixedly arranged at the top end of the piston rod (2), a universal butt joint assembly is arranged on the connecting seat (5), the universal butt joint assembly comprises a universal joint (6) and a hoop clamping piece (7) connected with the universal joint, and the detection end of the linear displacement sensor (4) is fixed through the hoop clamping piece (7).
2. The steam turbine valve adjusting detection device according to claim 1, wherein the universal joint (6) is an existing ball-and-socket universal joint, and the upper end of the universal joint (6) is provided with an external thread or screw hole (61) and the lower end is provided with a flange (62).
3. The steam turbine valve adjusting detection device according to claim 2, wherein the hoop clamping piece (7) comprises a hoop ring (71) and a connecting plate (72) connected with the flange plate (62).
4. The steam turbine damper adjusting detection device according to claim 1, wherein the connecting base (5) is provided with a fixing groove (8), and the universal joint (6) is fixed in the fixing groove (8) in a threaded or pin-jointed manner.
5. The steam turbine valve detecting device according to claim 1, characterized in that the linear displacement sensor (4) is an extension type displacement sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223320295.XU CN218674252U (en) | 2022-12-09 | 2022-12-09 | Steam turbine valve adjusting detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223320295.XU CN218674252U (en) | 2022-12-09 | 2022-12-09 | Steam turbine valve adjusting detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218674252U true CN218674252U (en) | 2023-03-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223320295.XU Active CN218674252U (en) | 2022-12-09 | 2022-12-09 | Steam turbine valve adjusting detection device |
Country Status (1)
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|---|---|
| CN (1) | CN218674252U (en) |
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2022
- 2022-12-09 CN CN202223320295.XU patent/CN218674252U/en active Active
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