CN214999758U - Steam turbine speed regulating valve position monitoring device - Google Patents
Steam turbine speed regulating valve position monitoring device Download PDFInfo
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- CN214999758U CN214999758U CN202120635683.3U CN202120635683U CN214999758U CN 214999758 U CN214999758 U CN 214999758U CN 202120635683 U CN202120635683 U CN 202120635683U CN 214999758 U CN214999758 U CN 214999758U
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- governing valve
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Abstract
The utility model relates to a chemical production equipment technical field discloses a steam turbine speed governing valve position monitoring device. Steam turbine governing valve position monitoring device is including being located inside speed governing valve rod (80) of casing (70), setting up in outside feedback piece (10) of steam turbine governing valve casing (70) and can the transmission connection speed governing valve rod (80) with the driving medium of feedback piece (10), be provided with in casing (70) with valve rod (80) backstop in extreme position's backstop face, speed governing valve rod (80) can be at the zero position and surpass the zero position move between the extreme position, with through the driving medium drives feedback piece (10) motion. Through setting up with the feedback piece that the speed governing valve rod links to each other, and will the feedback piece sets up outside the steam turbine speed governing valve casing, can with the displacement volume below the zero position of speed governing valve rod transmits the feedback piece, and then reaches the control the effect of speed governing valve rod position.
Description
Technical Field
The utility model relates to a chemical production equipment technical field specifically relates to a steam turbine speed governing valve position monitoring device.
Background
Along with the increase of coal mining, the discharge capacity of the coal gangue is greatly increased, and in order to strengthen the environmental protection and improve the comprehensive utilization efficiency of the coal gangue renewable resources, the coal gangue can be utilized to carry out thermal power generation. However, the coal gangue boiler has short operation time and high failure rate, and sudden failures are easy to occur, so that the turbine is stopped frequently, and the turbine speed regulating valve (mainly a pre-starting valve seat and a valve rod) is impacted by starting and stopping the turbine, so that the turbine speed regulating valve and the like are damaged; on the other hand, the maintenance period of the steam turbine is long, parts of the speed regulating valve of the steam turbine are not replaced timely, and the damage of the parts is not easy to find. When a speed regulating valve (a pre-opening valve seat and a valve rod) of the steam turbine is damaged, the valve rod of the speed regulating valve of the steam turbine can downwards run to a position below the lowest position of normal operation, so that the faults of over-rotation speed and the like of the steam turbine when the steam turbine is started or stopped are easily caused, the safe operation of the steam turbine is restricted, and the economic benefit of enterprises is influenced.
Therefore, one of the methods for solving the above problems is to find out that the speed regulating valve of the steam turbine is damaged in time and replace parts, but the current monitoring device for the valve position of the speed regulating valve of the steam turbine can only perform the stroke above the zero position (the lowest position in normal operation), and cannot monitor the valve position of the speed regulating valve of the steam turbine when the valve position of the speed regulating valve of the steam turbine runs below the zero position, so that the damage of the parts of the speed regulating valve of the steam turbine cannot be found, and therefore, a monitoring device capable of monitoring the valve position of the speed regulating valve of the steam turbine when the valve position of the speed regulating valve of the steam turbine runs below the zero position is urgently needed.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a steam turbine speed governing valve position monitoring device and steam turbine speed governing valve in order to overcome the problem that can't monitor below the steam turbine speed governing valve position zero-bit that prior art exists to the stroke is monitored below the steam turbine speed governing valve zero-bit.
In order to achieve the above object, the utility model provides a steam turbine speed governing valve position monitoring device. Steam turbine governing valve position monitoring device is including being located the inside speed governing valve rod of casing, setting up in the outside feedback piece of steam turbine governing valve casing and can the transmission connection the speed governing valve rod with the driving medium of feedback piece, be provided with in the casing with the valve rod stop is in extreme position's backstop face, the speed governing valve rod can be in the zero-bit and surpass the zero-bit remove between the extreme position, with through the driving medium drives the motion of feedback piece.
Optionally, movement of the valve stem from the zero position to the extreme position can drive movement of the feedback member from a first position to a second position.
Optionally, the feedback member is provided with a support surface, and the transmission member is capable of applying a pushing force to the support surface to move the feedback member from the first position to the second position.
Optionally, the transmission member includes a first connecting rod passing through the housing and connected to the speed regulating valve rod, and a second connecting rod connected to the first connecting rod, the second connecting rod being located on the upper side of the supporting surface and capable of pushing the supporting surface downward.
Optionally, the steam turbine governor valve position monitoring device further comprises an elastic component disposed between the casing and the feedback member, and an elastic force of the elastic component acting on the feedback member can drive the feedback member to move from the second position to the first position.
Optionally, the steam turbine governor valve position monitoring device further comprises a limiting device capable of limiting the feedback member from moving from the first position in a direction from the second position toward the first position.
Optionally, the limiting device includes a limiting block disposed at the top of the feedback member and a positioning block fixedly connected to the steam turbine speed regulating valve housing and located on the upper side of the limiting block, and when the feedback member is located at the first position, the top surface of the limiting block can be connected to the bottom surface of the positioning block.
Optionally, the steam turbine governor valve position monitoring device further comprises a guide member having a guide hole arranged in a vertical direction, and the feedback member slidably passes through the guide hole.
Optionally, the steam turbine governor valve position monitoring device further comprises an alarm component, and the alarm component can trigger the alarm component when the feedback component moves from the first position to the second position.
Optionally, the steam turbine governor valve position monitoring device includes a limit switch electrically connected to the alarm component, and the feedback member is capable of triggering the limit switch when the feedback member moves from the first position to the second position.
Through the technical scheme, the feedback piece connected with the speed regulation valve rod is arranged and is arranged outside the steam turbine speed regulation valve shell, so that the displacement below the zero position of the speed regulation valve rod can be transmitted to the feedback piece, and the position of the speed regulation valve rod is monitored.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of a speed regulation valve position monitoring device of a steam turbine according to the present invention;
FIG. 2 is a schematic structural view of an embodiment of the feedback member of the present invention;
fig. 3 is the structure schematic diagram of the middle speed regulating valve rod and the connecting assembly of the present invention.
Description of the reference numerals
10-a feedback piece, 11-a hook, 111-a supporting surface, 12-a guiding section, 13-a limiting block, 21-a first connecting rod, 22-a second connecting rod, 30-an elastic part, 40-a positioning block, 50-a limiting switch, 60-a guiding part, 70-a shell and 80-a speed regulating valve rod.
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.
In the present invention, unless otherwise specified, the use of the terms "upper", "lower", "top" and "bottom" generally refer to the orientation as shown in the drawings. It should be noted that this is only for the convenience of describing the present invention, and should not be construed as a limitation of the present invention.
In the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
The utility model provides a steam turbine speed governing valve position monitoring device. Steam turbine governing valve position monitoring device is including being located the inside speed governing valve rod 80 of casing 70, setting up in the outside feedback piece 10 of steam turbine governing valve casing 70 and can the transmission connection speed governing valve rod 80 with the driving medium of feedback piece 10, be provided with in the casing 70 with valve rod 80 backstop is in extreme position's backstop face, speed governing valve rod 80 can be at the zero position and surpass the zero position move between the extreme position, with through the driving medium drives the motion of feedback piece.
It should be noted that the stop surface is provided for protecting the governor valve rod 80 from excessively moving downward due to a governor valve damage failure, when the governor valve rod 80 normally works, due to movement inertia, the governor valve rod may slightly exceed the zero position downward, in order to prevent the stop surface from being damaged by the governor valve rod 80 and the housing 70 caused by impact generated on the governor valve rod 80 when the governor valve rod 80 normally works, and therefore the stop surface is located at a position a distance below the zero position, and the present solution is directed to a steam turbine governor valve position monitoring device in which the governor valve rod 80 crosses the zero position to reach the limit position or is located at a position between the zero position and the limit position.
Through the arrangement of the transmission parts connected with the speed regulation valve rod 80 and the feedback part 10, the movement of the speed regulation valve rod 80 is transmitted to the feedback part 10, so that the movement of the speed regulation valve rod 80 which is originally difficult to observe and is arranged in the shell 70 can be observed through the movement of the feedback part 10, and then whether the speed regulation valve rod 80 is positioned between the zero position and the extreme position can be conveniently determined. The transmission member may be connected to the speed control valve rod 80 and the feedback member 10 in various ways, such as welding, mechanical connection through bolts or pins, movable connection through hinges, or overlapping part provided on the feedback member 10 to overlap the transmission member.
Specifically, movement of the governor valve stem 80 from the zero position to the extreme position can drive the feedback member 10 from the first position to the second position. That is, when the speed-regulating valve rod 80 moves from the zero position to the extreme position, it can drive the transmission member fixedly connected with the speed-regulating valve rod, and further drive the feedback member 10 to move. Accordingly, the first position of the feedback element 10 corresponds to the zero position of the governor valve rod 80, and the second position of the feedback element 10 corresponds to the extreme position of the governor valve rod 80. The first position may be above the second position when the transmission member is fixedly connected to the feedback member 10 and the governor valve stem 80, respectively, and the first position may be below the second position when the transmission member is rotatably connected to the feedback member 10 and the governor valve stem 80, respectively, and the center position of the transmission member is fixed with respect to the housing 70.
In the utility model discloses in, refer to fig. 1 and fig. 2 and show, be provided with holding surface 111 on the feedback piece 10, the driving medium can to holding surface 111 applys thrust so that feedback piece 10 follows the first position to the second position removes. Referring to fig. 2, the feedback member 10 may include a hook 11 horizontally disposed at a bottom thereof, the supporting surface 111 may be disposed on an upper surface of the hook 11, a bottom surface of one end of the transmission member is overlapped with the supporting surface 111, and another end of the transmission member is fixedly connected to the governor valve rod 80, when the governor valve rod 80 moves from the zero position to the limit position, the transmission member may drive the feedback member 10 to move from the first position to the second position through the overlapped supporting surface 111, where the first position is located above the second position.
As a preferred embodiment, referring to fig. 1 and 3, the transmission member includes a first connecting rod 21 passing through the housing 70 and connected to the governor valve stem, and a second connecting rod 22 connected to the first connecting rod 21, wherein the second connecting rod 22 is located on the upper side of the supporting surface 111 and can push the supporting surface 111 downward. The housing 70 may be provided with a long hole through which the first connection rod passes, the upper end of the long hole needs to be higher than the first position, and the lower end of the long hole needs to be lower than the second position, that is, the connection rod may move up and down in the long hole without being blocked, one end of the first connection rod 21 may be connected to the speed control valve rod 80 through a bolt, the other end of the first connection rod may be provided with a mounting groove, and the second connection rod 22 is provided in the mounting groove and passes through and fixes the first connection rod and the second connection rod through a bolt. Through the arrangement mode, the movement of the speed regulating valve rod 80 can be conveniently and effectively transmitted to the feedback piece 10, and the second connecting rod 22 can be connected with a valve position monitoring device above a zero position, a mechanical indication device and the like.
In order to enable the steam turbine governor valve to be a monitoring device capable of automatically resetting and to be in a movement trend of moving upwards all the time, the steam turbine governor valve position monitoring device further comprises an elastic component 30 arranged between the shell 70 and the feedback piece 10, and the elastic force of the elastic component 30 acting on the feedback piece 10 can drive the feedback piece 10 to move from the second position to the first position. The elastic component may be a metal spring, or may be in the form of a rubber rod, and specifically, as shown in fig. 1, as an alternative embodiment, a spring fixing plate may be fixedly connected to the housing 70, the feedback member 10 may have an elastic member mounting position for mounting the elastic component 30, the elastic component 30 may be a spring, the spring is sleeved on the feedback member 10, an upper end of the spring is connected to the elastic member mounting position, a lower end of the spring is connected to the spring fixing plate, and the feedback member 10 may balance with an elastic force provided by the spring by its own gravity and may stay at the first position.
In order to make the feedback rod 10 stay at the first position more accurately, referring to fig. 1, the steam turbine governor valve position monitoring device further includes a limiting device capable of limiting the movement of the feedback member 10 from the first position to the second position toward the first position. The limiting device can be arranged at the top of the feedback part, positioned by using the positioning block and arranged in the middle of the feedback part, and limited by using a slide way and a slide block in a matching way. Since it is difficult for the feedback member 10 to accurately stay at the zero position when the self weight of the feedback member 10 is balanced with the elastic force provided by the elastic member 30, the elastic force applied by the elastic member 30 to the feedback member 10 can be made to be greater than the gravity of the feedback member itself, and at this time, the feedback member 10 will be located above the first position, so that the limiting device will force the spring to compress and make the feedback member 10 stay at the first position.
The utility model discloses in, stop device including set up in stopper 13 and rigid coupling at feedback piece 10 top in casing 70 just is located the locating piece 40 of stopper 13 upside, feedback piece 10 is located during the first position, stopper 13 the top surface can with locating piece 40's bottom surface meets. The limiting device is simple in arrangement and convenient to adjust, and the position of the positioning block on the shell can be directly adjusted.
In order to allow the feedback member to move in the vertical direction more smoothly, referring to fig. 1, the steam turbine governor valve position monitoring apparatus further includes a guide member 60, the guide member 60 having a guide hole provided in the vertical direction, through which the feedback member 10 slidably passes. The guide hole can limit the circumferential movement of the feedback member 10, so that the feedback member 10 can only move linearly in the vertical direction, and the movement of the speed regulating valve rod 80 can be more accurately transmitted to the feedback member 10. The guide member 60 may be fixed to the housing 70, the guide hole may be a circular hole or a square hole, and accordingly, the feedback member 10 may have a guide section, and the shape of the guide section matches the shape of the guide hole. Furthermore, the guide section may be provided with a smaller diameter, so that the guide section in cooperation with the guide member 60 may limit the range of movement of the feedback member 10 in the vertical direction.
In order to better play a role of reminding workers, the steam turbine speed regulating valve position monitoring device can further comprise an alarm component, and when the feedback piece 10 moves from the first position to the second position, the feedback piece 10 can trigger the alarm component. Specifically, as an alternative embodiment, the alarm component may be a bell connected to the feedback piece 10, and when the feedback piece 10 moves from the first position to the second position, the feedback piece 10 drives the bell, and the bell sounds to remind a worker.
According to a preferred embodiment of the present invention, referring to fig. 2, the steam turbine speed regulating valve position monitoring device includes a limit switch 50 electrically connected to the alarm component, and the feedback member 10 is capable of triggering the limit switch 50 when moving from the first position to the second position. As an alternative embodiment, the top of the feedback member 10 has a hook, the lower portion of the hook has a semicircular shape, the limit switch 50 has a triggering part capable of being lifted in a rotating manner, the hook is connected to the triggering part of the limit switch 50, and when the feedback member 10 moves from the first position to the second position, the triggering part is driven by the hook, so that the limit switch 50 converts the displacement of the feedback member 10 into an electrical signal and transmits the electrical signal to the alarm part. Alarm component can be parts such as simple loudspeaker, warning light, also can be remote connection's siren, steam turbine speed governing valve generally control and monitor through the DCS control room, consequently can with in signal of telecommunication transmission to the DCS control room that limit switch 50 sent to send out the acousto-optic warning, in time indicate the staff to go to the maintenance.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited thereto. In the technical idea scope of the present invention, it is possible to provide a solution of the present invention with a plurality of simple modifications to avoid unnecessary repetition, and the present invention is not described separately for various possible combinations. These simple variations and combinations should also be considered as disclosed in the present invention, all falling within the scope of protection of the present invention.
Claims (10)
1. The utility model provides a steam turbine governing valve position monitoring device, its characterized in that, steam turbine governing valve position monitoring device is including being located inside speed governing valve rod (80) of casing (70), setting up in outside feedback piece (10) of steam turbine governing valve casing (70) and can the transmission connection speed governing valve rod (80) with the driving medium of feedback piece (10), be provided with in casing (70) with valve rod (80) backstop in extreme position's backstop face, speed governing valve rod (80) can be at the zero position and surpass the zero position move between the extreme position, with through the driving medium drives feedback piece (10) motion.
2. A turbine governor valve position monitoring apparatus according to claim 1, wherein movement of the valve stem (80) from the zero position to the extreme position is operable to move the feedback member (10) from the first position to the second position.
3. A turbine governor valve position monitoring apparatus according to claim 2, wherein the feedback member (10) is provided with a bearing surface (111), and the transmission member is capable of applying a pushing force to the bearing surface (111) to move the feedback member (10) from the first position to the second position.
4. The steam turbine governor valve position monitoring device according to claim 3, characterized in that the transmission member includes a first connecting rod (21) passing through the casing (70) and connected to the governor valve stem, and a second connecting rod (22) connected to the first connecting rod (21), the second connecting rod (22) being located on the upper side of the support surface (111) and being capable of pushing the support surface (111) downward.
5. The turbine governor valve position monitoring device according to claim 1, further comprising an elastic member (30) disposed between the housing (70) and the feedback member (10), wherein an elastic force of the elastic member (30) acting on the feedback member (10) can drive the feedback member (10) to move from the second position to the first position.
6. A turbine governor valve position monitoring apparatus according to claim 2, characterized in that the turbine governor valve position monitoring apparatus further comprises a limiting device capable of limiting movement of the feedback member (10) from the first position in a direction from the second position toward the first position.
7. The steam turbine speed regulating valve position monitoring device according to claim 6, wherein the limiting device comprises a limiting block (13) arranged at the top of the feedback member (10) and a positioning block (40) fixedly connected to the casing (70) and located on the upper side of the limiting block (13), and when the feedback member (10) is located at the first position, the top surface of the limiting block (13) can be connected with the bottom surface of the positioning block (40).
8. The turbine governor valve position monitoring device according to claim 1, further comprising a guide member (60), the guide member (60) having a guide hole provided in a vertical direction, the feedback member (10) slidably passing through the guide hole.
9. A turbine governor valve position monitoring apparatus according to claim 2, further comprising an alarm component, wherein the feedback member (10) is capable of triggering the alarm component when the feedback member (10) moves from the first position to the second position.
10. A turbine governor valve position monitoring apparatus according to claim 9, including a limit switch (50) electrically connected to the alarm member, the limit switch being actuatable by the feedback member (10) when the feedback member (10) is moved from the first position to the second position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120635683.3U CN214999758U (en) | 2021-03-29 | 2021-03-29 | Steam turbine speed regulating valve position monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120635683.3U CN214999758U (en) | 2021-03-29 | 2021-03-29 | Steam turbine speed regulating valve position monitoring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214999758U true CN214999758U (en) | 2021-12-03 |
Family
ID=79163221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120635683.3U Active CN214999758U (en) | 2021-03-29 | 2021-03-29 | Steam turbine speed regulating valve position monitoring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214999758U (en) |
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2021
- 2021-03-29 CN CN202120635683.3U patent/CN214999758U/en active Active
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