Guide vane displacement sensor support suitable for large hydropower station

Abstract

The utility model relates to the field of supporting devices, and discloses a guide vane displacement sensor support suitable for a large hydropower station, which comprises an oil cylinder, a supporting mechanism is arranged on the upper surface of the oil cylinder, a moving mechanism is arranged on the upper surface of the supporting mechanism, the supporting mechanism comprises a rectangular strip, and the rectangular strip is fixedly connected to the upper surface of the oil cylinder through a bolt. A connecting plate is fixedly connected to the front surface of the rectangular strip, a supporting rod is fixedly connected to the right end of the lower surface of the connecting plate, a fixing plate is fixedly connected to the lower surface of the supporting rod, and an induction rod is installed on the upper surface of the front end of the fixing plate. According to the utility model, through the cooperation of the fixed plate, the connecting plate and the two groups of supporting rods and double-rod guiding, the sensing rod can stably move along with the movable plate, and meanwhile, the fixed plate, the connecting plate and the oil cylinder are directly and fixedly connected through the rectangular strip and the hoop, so that the stability of the bracket is improved.

Description

Technical Field

[0001] The utility model relates to the field of supporting devices, in particular to a bracket for a guide vane displacement sensor suitable for a large hydropower station. Background Art

[0002] Some large hydropower stations will install bulb-type cross-flow turbine units. Generally, each unit is equipped with 4 sets of guide vane displacement sensors, including 2 sets of wire-type guide vane displacement sensors and 2 sets of magnetostrictive guide vane displacement sensors. In order to ensure the synchronization of multiple sets of guide vane displacement sensors, all of them will be installed on the same bracket to ensure the accuracy of detection.

[0003] In the prior art, some guide vane displacement sensors are simply installed on a support column. Since the guide vane displacement sensor needs to move during use, it is simply guided and supported by a support rod, which may cause the bracket to shake during the operation of the bracket unit. Especially in the event of emergency start-up and shutdown, the bracket shaking is particularly obvious, which may cause damage to the wire-type guide vane displacement sensor and misalignment of the magnetostrictive guide vane displacement sensor, causing speed regulator failure. Therefore, a guide vane displacement sensor bracket suitable for large hydropower stations is proposed to solve the above problems. Utility Model Content

[0004] In order to make up for the above shortcomings, the utility model provides a bracket for a guide vane displacement sensor suitable for large hydropower stations, aiming to improve the problem of low stability of the bracket used in some large hydropower station guide vane displacement sensors in the prior art.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a bracket for guide vane displacement sensor suitable for large hydropower stations, comprising an oil cylinder, a supporting mechanism is provided on the upper surface of the oil cylinder, a movable mechanism is provided on the upper surface of the supporting mechanism, the supporting mechanism comprises a rectangular bar, the rectangular bar is fixedly connected to the upper surface of the oil cylinder by bolts, the front surface of the rectangular bar is fixedly connected to a connecting plate, the right end of the lower surface of the connecting plate is fixedly connected to a supporting rod, the lower surface of the support rod is fixedly connected to a fixing plate, the upper surface of the front end of the fixing plate is equipped with a sensing rod, the sensing rod passes through and slides on the lower surface of the front end of the connecting plate, the movable mechanism comprises a sliding rod, the sliding rod passes through and is slidably connected to the upper surface of the connecting plate, the lower surface of the sliding rod is fixedly connected to the movable plate, and the inner wall of the right end of the movable plate is slidably connected to the outer wall of the support rod.

[0006] As a further description of the above technical solution:

[0007] The moving mechanism also includes a fixed block, which is fixedly connected to the front surface of the top end of the cylinder by bolts. The outer wall of the top end of the slide rod contacts the inner wall of the front end of the fixed block, and the outer wall of the top end of the slide rod is threadedly connected with a nut.

[0008] As a further description of the above technical solution:

[0009] The support mechanism further comprises a connecting block, which is fixedly connected to the rear surface of the fixing plate. A clamp is fixedly connected to the rear surface of the connecting block, and the clamp is fixedly connected to the outer wall of the bottom end of the oil cylinder by bolts.

[0010] As a further description of the above technical solution:

[0011] The support rods are provided in multiple groups, and the multiple groups of support rods are symmetrically arranged with the center line of the connecting plate as the symmetry axis.

[0012] As a further description of the above technical solution:

[0013] A fixing assembly is provided on the front surface of the movable plate, and the fixing assembly includes a clamping block, the rear surface of the clamping block is slidably connected to the front surface of the movable plate, the left surface of the front end of the clamping block contacts the right surface of the sensing rod, the rear surface of the clamping block is fixedly connected to a slider, and the rear surface of the slider is fixedly connected to a sliding column.

[0014] As a further description of the above technical solution:

[0015] A second through slot is provided on the front surface of the movable plate, and the sliding block is slidably connected to the inner wall of the second through slot.

[0016] As a further description of the above technical solution:

[0017] The rear surface of the movable plate is slidably connected to a connecting strip, the lower surface of the connecting strip is fixedly connected to a guide plate, the rear surface of the guide plate is provided with a through slot 1, and the sliding column is slidably connected to the inner wall of the through slot 1.

[0018] As a further description of the above technical solution:

[0019] A fastening screw is threadedly connected through the right surface of the connecting bar, a bolt hole is opened on the right surface of the movable plate, and the outer wall of the left end of the fastening screw is threadedly connected to the inner wall of the bolt hole.

[0020] The utility model has the following beneficial effects:

[0021] 1. In the present invention, through the cooperation between the fixed plate, the connecting plate and the two sets of support rods, the double-rod guide can ensure that the sensing rod moves stably following the movable plate. At the same time, through the rectangular strips and clamps, the fixed plate, the connecting plate and the oil cylinder are directly fixedly connected, thereby improving the stability of the bracket.

[0022] 2. In the present invention, the stability of the connection between the sensing rod and the movable plate can be ensured by setting a clamping assembly. When disassembling the sensing rod, it is only necessary to push the connecting bar, and then through the cooperation between the set guide plate, through groove one, through groove two, sliding column and slider, multiple groups of sensing rods can detect the clamping limit together, thereby improving practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the overall device in the utility model;

[0024] Figure 2 This is a schematic diagram of the disassembled three-dimensional structure of the oil cylinder and the fixed plate in the utility model;

[0025] Figure 3 For this utility model Figure 1 A schematic diagram of the enlarged three-dimensional structure of the A region;

[0026] Figure 4 For this utility model Figure 2 An enlarged schematic diagram of the three-dimensional structure of region B.

[0027] Legend:

[0028] 1. Cylinder; 21. Clamp; 22. Fixed plate; 23. Support rod; 24. Connecting plate; 25. Sensing rod; 26. Rectangular bar; 27. Connecting block; 31. Sliding rod; 32. Fixed block; 33. Nut; 34. Moving plate; 35. Fixed assembly; 351. Clamp; 352. Sliding block; 353. Connecting bar; 354. Fastening screw; 355. Guide plate; 356. Through slot 1; 357. Sliding column; 36. Through slot 2; 37. Bolt hole. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] Reference Figure 1 - Figure 2, the utility model provides an embodiment: a guide vane displacement sensor bracket suitable for large hydropower stations, including a cylinder 1, the cylinder 1 is a prior art, which is a guide vane relay cylinder 1, ensuring that the device can operate normally, and technical personnel in this field can implement it. Since it is a prior art, it will not be described in detail in this case. A supporting mechanism is provided on the upper surface of the cylinder 1, and a moving mechanism is provided on the upper surface of the supporting mechanism. The supporting mechanism includes a rectangular bar 26 that ensures the installation stability of the connecting plate 24. The rectangular bar 26 is fixedly connected to the upper surface of the cylinder 1 by bolts, and is fixed by bolts. The front surface of the rectangular bar 26 is fixedly connected to the connecting plate 24, and the sensor support bracket is composed of the connecting plate 24, the support rod 23 and the fixing plate 22. The right end of the lower surface of the connecting plate 24 is fixedly connected to the support rod 23, and the lower surface of the support rod 23 is fixedly connected to the fixing plate 22. The upper surface of the front end of the fixing plate 22 is installed with a sensing rod 25. The sensing rod 25 is a prior art. It can sense the displacement of the guide vane and transmit it through the transmission line connected to its bottom end. The sensing rod 25 passes through the lower surface of the front end of the connecting plate 24.

[0031] Reference Figure 1 - Figure 2 The outer wall of the top end of the sliding rod 31 contacts the inner wall of the front end of the fixing block 32, and the outer wall of the top end of the sliding rod 31 is threadedly connected to a nut 33, which is a prior art. The nut 33 is threadedly connected to the outer wall of the top end of the sliding rod 31, and at the same time, it contacts the upper surface of the fixing block 32, ensuring that the oil cylinder 1 can smoothly drive the sliding rod 31 to move.

[0032] Reference Figure 2 The support mechanism also includes a connecting block 27 to ensure the stable connection between the clamp 21 and the fixed plate 22. The connecting block 27 is fixedly connected to the rear surface of the fixed plate 22. The rear surface of the connecting block 27 is fixedly connected to the clamp 21. The clamp 21 is in the prior art and is fixed to the outer wall of the cylinder 1 by bolts to ensure the stability of the connecting plate 24. The clamp 21 is fixedly connected to the outer wall of the bottom end of the cylinder 1 by bolts. There are multiple groups of support rods 23. Multiple groups of support rods 23 are set to ensure the stability of the up and down movement of the movable plate 34, and the multiple groups of support rods 23 are symmetrically arranged with the center line of the connecting plate 24 as the axis of symmetry.

[0033] Reference Figure 2 - Figure 4 The front surface of the movable plate 34 is provided with a fixing component 35, and the fixing component 35 includes a clamping block 351. The surface of the clamping block 351 in contact with the sensing rod 25 is provided with a rubber material to ensure the stability of the multiple groups of clamping blocks 351 when clamping the sensing rod 25. The rear surface of the clamping block 351 is slidably connected to the front surface of the movable plate 34. The left surface of the front end of the clamping block 351 contacts the right surface of the sensing rod 25. The rear surface of the clamping block 351 is fixedly connected with a slider 352 that ensures the stable movement of the clamping block 351. The rear surface of the slider 352 is fixedly connected with a sliding column 357. The front surface of the movable plate 34 is provided with a through groove 2 36 that ensures the stable left and right horizontal movement of the clamping block 351. The slider 352 is slidably connected to the inner wall of the through groove 2 36. The rear surface of the movable plate 34 is slidably connected with a connecting bar 353. By pushing the connecting bar 353 can drive multiple groups of guide plates 355 to move, ensuring that multiple groups of clamping blocks 351 can move synchronously, and multiple groups of sensing rods 25 can release the limit synchronously. The lower surface of the connecting bar 353 is fixedly connected to the guide plate 355, and the rear surface of the guide plate 355 is provided with a through groove 1 356. The through groove 1 356 has a certain slope to ensure that when the guide plate 355 is pushed to move, the sliding column 357 can move along the slope of the through groove 1 356. The sliding column 357 is slidably connected to the inner wall of the through groove 1 356. The right surface of the connecting bar 353 is threaded with a fastening screw 354. The fastening screw 354 is a prior art, and the connecting bar 353 can be fixed by it. The right surface of the movable plate 34 is provided with a bolt hole 37, and the outer wall of the left end of the fastening screw 354 is threadedly connected to the inner wall of the bolt hole 37.

[0034] Working principle: When the guide vane of a large hydropower station is displaced, since the sensing rod 25 is connected to the guide vane coherent structure through the transmission line connected to its bottom end, the displacement of the guide vane will cause the sensing rod 25 to expand and contract. The sensing rod 25 is slidably connected to the lower surface of the front end of the connecting plate 24. At the same time, the inner wall of the right end and the inner wall of the left end of the moving plate 34 are slidably connected with a group of support rods 23, which ensures the stability of the moving plate 34 during movement. In addition, when installing the overall bracket, use bolts to fix the rectangular bar 26 on the upper surface of the cylinder 1, and then use bolts to fix the clamp 21 on the outer wall of the bottom end of the cylinder 1. It is necessary to ensure that the outer wall of the top end of the slide rod 31 is on the inner wall of the front end of the fixed block 32, and use the nut 33 to rotate on the outer wall of the top end of the slide rod 31 to ensure that the slide rod 31 can be smoothly driven to move through the fixed block 32 when the cylinder 1 moves.

[0035] When the sensing rod 25 needs to be disassembled, the fastening screw 354 is turned to release the limit on the connecting bar 353, and then the connecting bar 353 is pushed. The guide plate 355 on the lower surface of the connecting bar 353 will move accordingly. At this time, the sliding column 357 will slide on the inner wall of the through groove 1 356 and drive the slider 352 to move in the through groove 2 36 along the inclination of the through groove 1 356, so that the clamping block 351 releases the clamping of the sensing rod 25, thereby releasing the limit of multiple groups of sensing rods 25 together, facilitating the disassembly of the sensing rod 25. In this way, the disassembly is completed. During installation, the operation method is simultaneous, but the direction of structural movement is opposite.

[0036] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A guide vane displacement sensor bracket for a large hydropower station, comprising an oil cylinder (1), characterized in that: The upper surface of the oil cylinder (1) is provided with a supporting mechanism, and the upper surface of the supporting mechanism is provided with a moving mechanism, the supporting mechanism comprises a rectangular bar (26), the rectangular bar (26) is fixedly connected to the upper surface of the oil cylinder (1) by bolts, the front surface of the rectangular bar (26) is fixedly connected to a connecting plate (24), the right end of the lower surface of the connecting plate (24) is fixedly connected to a supporting rod (23), the lower surface of the supporting rod (23) is fixedly connected to a fixing plate (22), the upper surface of the front end of the fixing plate (22) is provided with a sensing rod (25), the sensing rod (25) penetrates and slides on the lower surface of the front end of the connecting plate (24), and the moving mechanism comprises a sliding rod (31), the sliding rod (31) penetrates and slides on the upper surface of the connecting plate (24), the lower surface of the sliding rod (31) is fixedly connected to a moving plate (34), and the inner wall of the right end of the moving plate (34) is slidably connected to the outer wall of the supporting rod (23).

2. The guide vane displacement sensor bracket for a large hydropower station according to claim 1, characterized in that: The moving mechanism further comprises a fixed block (32), wherein the fixed block (32) is fixedly connected to the front surface of the top end of the oil cylinder (1) by means of bolts, the outer wall of the top end of the slide rod (31) contacts the inner wall of the front end of the fixed block (32), and the outer wall of the top end of the slide rod (31) is threadedly connected to a nut (33).

3. The guide vane displacement sensor bracket for a large hydropower station according to claim 1, characterized in that: The support mechanism further comprises a connecting block (27), wherein the connecting block (27) is fixedly connected to the rear surface of the fixing plate (22), and a clamp (21) is fixedly connected to the rear surface of the connecting block (27), and the clamp (21) is fixedly connected to the outer wall of the bottom end of the oil cylinder (1) by means of bolts.

4. The guide vane displacement sensor bracket for a large hydropower station according to claim 1, characterized in that: The support rods (23) are provided in multiple groups, and the multiple groups of support rods (23) are symmetrically arranged with the center line of the connecting plate (24) as the symmetry axis.

5. The guide vane displacement sensor bracket for a large hydropower station according to claim 2, characterized in that: The front surface of the movable plate (34) is provided with a fixed assembly (35), and the fixed assembly (35) includes a clamping block (351), the rear surface of the clamping block (351) is slidably connected to the front surface of the movable plate (34), the left surface of the front end of the clamping block (351) contacts the right surface of the sensing rod (25), the rear surface of the clamping block (351) is fixedly connected to a slider (352), and the rear surface of the slider (352) is fixedly connected to a sliding column (357).

6. The guide vane displacement sensor bracket for a large hydropower station according to claim 5, characterized in that: A second through slot (36) is provided on the front surface of the movable plate (34), and the slider (352) is slidably connected to the inner wall of the second through slot (36).

7. The guide vane displacement sensor bracket for a large hydropower station according to claim 5, characterized in that: The rear surface of the movable plate (34) is slidably connected to a connecting strip (353), the lower surface of the connecting strip (353) is fixedly connected to a guide plate (355), the rear surface of the guide plate (355) is provided with a through slot (356), and the sliding column (357) is slidably connected to the inner wall of the through slot (356).

8. The guide vane displacement sensor bracket for a large hydropower station according to claim 7, characterized in that: A fastening screw (354) is threadedly connected through the right surface of the connecting bar (353), a bolt hole (37) is opened on the right surface of the movable plate (34), and the outer wall of the left end of the fastening screw (354) is threadedly connected to the inner wall of the bolt hole (37).

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