Hydropower station hydraulic hoist piston rod corrosion detection device

Abstract

The utility model discloses a hydraulic hoist piston rod corrosion detection device for a hydropower station, which relates to the technical field of hydraulic hoist piston rod corrosion detection device design and comprises an I-shaped circular frame, a corrosion detection unit and a clamping and fixing unit. A clamping and fixing unit is arranged in the I-shaped circular frame, the corrosion detection unit comprises an outer gear ring, a movable sliding block, a power motor, a rotating gear, a fixed vertical rod and an auxiliary vertical column, the movable sliding block is slidably connected to the annular sliding rail, and the outer gear ring fixedly sleeves the outer side surface of the annular sliding rail. The upper side surface of the movable sliding block is fixedly connected with a power motor through a supporting frame, different positions of the piston rod are detected conveniently, the corrosion detection efficiency is not affected, during detection, the hydraulic hoist of the hydropower station is fixed more stably, and use is not affected.

Description

Technical Field

[0001] The utility model relates to the technical field of the design of a rust detection device for the piston rod of a hydraulic hoist, in particular to a rust detection device for the piston rod of a hydraulic hoist in a hydropower station. Background Technique

[0002] The hydraulic hoist in a hydropower station is used for various large-scale water supply and drainage, water conservancy and hydropower projects. It is used to control the lifting of various large and medium-sized cast iron gates and steel gates to achieve the purpose of opening and closing. There are multiple hydraulic hoists in a hydropower station. After several years of operation, there is a certain degree of rust on the surface of their piston rods. If the piston rod rusts to a certain extent, it will cause damage to the oil cylinder seal during operation. The rust-detached pollutants will cause oil pollution, and even cause blockage and failure of the control valve, and ultimately the hoist cannot be opened and closed normally. Therefore, a rust detection device for the piston rod of a hydraulic hoist in a hydropower station is needed for convenient detection and use.

[0003] The existing rust detection devices for the piston rods of hydraulic hoists in hydropower stations are inconvenient for detecting different positions of the piston rods, which affects the rust detection efficiency. When detecting, the hydraulic hoists in hydropower stations are not fixed stably, which affects the use. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is to overcome the existing defects and provide a rust detection device for the piston rod of a hydraulic hoist in a hydropower station, which is more convenient for detecting different positions of the piston rod, does not affect the rust detection efficiency, and is more stable when fixing the hydraulic hoist in the hydropower station during detection, without affecting the use, and can effectively solve the problems in the background technique.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: A rust detection device for the piston rod of a hydraulic hoist in a hydropower station, including an I-shaped circular frame, a rust detection unit, and a clamping and fixing unit;

[0006] I-shaped circular frame: A circular slide rail is fixedly connected to the upper surface, and a clamping and fixing unit is arranged inside the I-shaped circular frame;

[0007] Rust detection unit: It includes an external toothed ring, a moving slider, a power motor, a rotating gear, a fixed vertical rod and an auxiliary vertical column. A moving slider is slidably connected to the annular slide rail. An external toothed ring is fixedly sleeved on the outer surface of the annular slide rail. The upper surface of the moving slider is fixedly connected to the power motor through a support frame. The output shaft of the power motor is fixedly connected to an output cylinder. The lower end of the output cylinder penetrates the moving slider and is fixedly connected to the rotating gear. The rotating gear is arranged outside the annular slide rail. The external toothed ring is meshed with the rotating gear. The upper surface of the moving slider is fixedly connected to a fixed vertical rod. A chute is opened on the fixed vertical rod. The chute penetrates the left and right sides of the fixed vertical rod. An auxiliary vertical column is fixedly connected in the chute. The input end of the power motor is electrically connected to the output end of an external power supply through an external control switch group.

[0008] The I-shaped circular frame is used to fix the device. The annular slide rail is used to drive the moving slider to slide. The power motor is started to drive the rotating gear to rotate. The rotating gear and the external toothed ring are meshed to drive the moving slider to move, so as to make the detection device rotate annularly and thus be used for detection. The fixed vertical rod is used to fix the auxiliary vertical column. The auxiliary vertical column is used to make the height adjustment slider move more stably, so as to adjust the position of the detection device and detect different positions.

[0009] Further, the rust detection unit further includes a height adjustment slider, a moving push plate and an electric telescopic column 1. A height adjustment slider is slidably connected in the chute on the fixed vertical rod. The sliding hole on the height adjustment slider is slidably connected to the corresponding auxiliary vertical column. The right surface of the height adjustment slider is fixedly connected to a moving push plate. The upper surface of the fixed vertical rod is fixedly connected to the electric telescopic column 1 through a support top plate. The lower end of the electric telescopic column 1 penetrates the corresponding support top plate and is fixedly connected to the moving push plate. The input end of the electric telescopic column 1 is electrically connected to the output end of an external power supply through an external control switch group.

[0010] The height adjustment slider is used to adjust the height to detect different positions. The electric telescopic column 1 is started to push the moving push plate to move. The moving push plate is used to drive the height adjustment slider to move, so as to adjust the height, which is convenient for detecting different positions of the piston rod and convenient for use.

[0011] Further, the rust detection unit further includes an electric telescopic column II, an arc plate, an auxiliary rotating roller, a support flat plate and a rust detector. The left end surface of the height adjustment slider is fixedly connected with an electric telescopic column II. The extended end of the electric telescopic column II is fixedly connected with an arc plate. A plurality of annularly arrayed clamping grooves are formed in the arc plate. Each clamping groove in the arc plate is rotatably connected with an auxiliary rotating roller respectively. The upper end face of the arc plate is fixedly connected with a support flat plate. The upper side surface of the support flat plate is fixedly connected with the rust detector through a support frame. The input ends of the electric telescopic column II and the rust detector are electrically connected with the output end of an external power supply through an external control switch group.

[0012] The electric telescopic column II is used to adjust the position of the arc plate. The arc plate is used to contact the piston rod for convenient detection. The auxiliary rotating roller is used to make the movement of the arc plate more stable. The support flat plate is used to fix the rust detector. The rust detector is used to detect rust, so as to conduct detection. The rust detector adopts an industrial rust detector for detection.

[0013] Further, the clamping and fixing unit includes an adjusting threaded column, a clamping arc plate, a rotating handrail and a connecting flat plate. Four annularly arrayed screw holes are formed in the end face of the I-shaped circular frame. The four screw holes respectively extend into the I-shaped circular frame. Each screw hole is threadedly connected with an adjusting threaded column respectively. A clamping arc plate is arranged on the corresponding side surfaces of the four adjusting threaded columns. Each clamping arc plate is rotatably connected with the corresponding adjusting threaded column through a rotating seat respectively. The non-corresponding end faces of the four adjusting threaded columns are fixedly connected with a rotating handrail respectively. The bottom surface in the I-shaped circular frame is fixedly connected with a connecting flat plate at the corresponding positions of the four adjusting threaded columns.

[0014] The rotating handrail is started to drive the adjusting threaded column to rotate. The adjusting threaded column rotates to push the position of the clamping arc plate. The clamping arc plate is used to fixedly clamp the hydraulic hoist of the hydropower station, so as to fix the hydraulic hoist of the hydropower station. The connecting flat plate is used to fix the double-threaded column, so as to fixedly clamp the hydraulic hoist of the hydropower station for convenient detection.

[0015] Further, the clamping and fixing unit further includes a double-threaded column and a moving slider II. A first sliding groove is formed on the upper side surface of each of the four connecting flat plates. A double-threaded column is rotatably connected in each sliding groove. The thread directions of each double-threaded column are opposite. Two equidistant moving sliders II are slidably connected in each first sliding groove respectively. The screw holes on each moving slider II are threadedly connected to the corresponding double-threaded column. The four double-threaded columns respectively extend to the outside of the corresponding connecting flat plate and are fixedly clamped with the handrail.

[0016] The two-way threaded column rotates to drive the second moving slider to move. The second moving slider moves to adjust the position of the limit clamping plate, thereby facilitating the clamping of the two-way threaded column and conveniently fixing and adjusting the threaded column for use.

[0017] Furthermore, the clamping and fixing unit further includes limit clamping plates. A limit clamping plate is fixedly connected to the upper surface of each second moving slider, and the two limit clamping plates on each connecting flat plate correspond to the two-way threaded column respectively.

[0018] The limit clamping plate is used to clamp the two-way threaded column. After adjusting to the appropriate position, the two-way threaded column is clamped by the limit clamping plate to make the fixation more stable.

[0019] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0020] 1. This rust detection device for the piston rod of the hydraulic hoist in the hydropower station has the following advantages: There is a rust detection unit. The annular slide rail is used to drive the moving slider to slide. When the power motor is started, it drives the rotating gear to rotate. The rotating gear meshes with the external gear ring to drive the moving slider to move, thereby making the detection device rotate annularly for detection use. The fixed vertical rod is used to fix the auxiliary vertical column, and the auxiliary vertical column is used to make the height adjustment slider move more stably. The height adjustment slider is used to adjust the height to detect different positions. When the first electric telescopic column is started, it pushes the moving push plate to move, and the moving push plate is used to drive the height adjustment slider to move, thereby adjusting the height. The second electric telescopic column is used to adjust the position of the arc plate, and the arc plate is used to contact the piston rod for convenient detection use. The auxiliary rotating roller is used to make the arc plate move more stably. The supporting flat plate is used to fix the rust detector, and the rust detector is used to detect rust for detection use.

[0021] 2. This rust detection device for the piston rod of the hydraulic hoist in the hydropower station has the following advantages: There is a clamping and fixing unit. When the rotating handrail is started, it drives the adjusting threaded column to rotate. The adjusting threaded column rotates to push the position of the clamping arc plate. The clamping arc plate is used to fixedly clamp the hydraulic hoist in the hydropower station, thereby fixing the hydraulic hoist in the hydropower station. The connecting flat plate is used to fix the two-way threaded column. Furthermore, the clamping and fixing unit further includes limit clamping plates. A limit clamping plate is fixedly connected to the upper surface of each second moving slider, and the two limit clamping plates on each connecting flat plate correspond to the two-way threaded column respectively. The limit clamping plate is used to clamp the two-way threaded column. After adjusting to the appropriate position, the two-way threaded column is clamped by the limit clamping plate to fix the hydraulic hoist in the hydropower station.

[0022] 3. The hydraulic hoist piston rod corrosion detection device of this hydropower station has the following advantages: it is convenient to detect different positions of the piston rod, does not affect the corrosion detection efficiency, and when detecting, it is more stable to fix the hydraulic hoist of the hydropower station and does not affect the use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a front structural schematic diagram of the present utility model;

[0024] Figure 2 is a rear cross-sectional structural schematic diagram of the present utility model;

[0025] Figure 3 For the present utility model Figure 2 is a partial enlarged structural schematic diagram at position A in the present utility model;

[0026] Figure 4 For the present utility model Figure 2 is a partial enlarged structural schematic diagram at position B in the present utility model.

[0027] In the figure: 1 I-shaped circular frame, 2 annular slide rail, 3 corrosion detection unit, 31 external toothed ring, 32 moving slider, 33 power motor, 34 rotating gear, 35 fixed vertical rod, 36 auxiliary vertical column, 37 height adjustment slider, 38 moving push plate, 39 electric telescopic column 1, 310 electric telescopic column 2, 311 arc plate, 312 auxiliary rotating roller, 313 support flat plate, 314 corrosion detector, 4 clamping and fixing unit, 41 adjusting threaded column, 42 clamping arc plate, 43 rotating handrail, 44 connecting flat plate, 45 double-threaded column, 46 moving slider 2, 47 limit clamping plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0029] Please refer to Figures 1-4 , this embodiment provides a technical solution: a hydraulic hoist piston rod corrosion detection device for a hydropower station, including an I-shaped circular frame 1, a corrosion detection unit 3, and a clamping and fixing unit 4;

[0030] I-shaped circular frame 1: A circular slide rail 2 is fixedly connected to the upper surface, and a clamping and fixing unit 4 is arranged inside the I-shaped circular frame 1;

[0031] Rust detection unit 3: It includes an external gear ring 31, a moving slider 32, a power motor 33, a rotating gear 34, a fixed vertical rod 35 and an auxiliary vertical column 36. A moving slider 32 is slidably connected to the annular slide rail 2. An external gear ring 31 is fixedly sleeved on the outer surface of the annular slide rail 2. The upper surface of the moving slider 32 is fixedly connected to the power motor 33 through a support frame. The output shaft of the power motor 33 is fixedly connected to the output cylinder. The lower end of the output cylinder penetrates through the moving slider 32 and is fixedly connected to the rotating gear 34. The rotating gear 34 is arranged outside the annular slide rail 2. The external gear ring 31 is meshed with the rotating gear 34. The upper surface of the moving slider 32 is fixedly connected to a fixed vertical rod 35. A chute is opened on the fixed vertical rod 35. The chute penetrates through the left and right sides of the fixed vertical rod 35. An auxiliary vertical column 36 is fixedly connected in the chute. The input end of the power motor 33 is electrically connected to the output end of the external power supply through an external control switch group.

[0032] The I-shaped circular frame 1 is used to fix the device. The annular slide rail 2 is used to drive the moving slider 32 to slide. The power motor 33 is started to drive the rotating gear 34 to rotate. The rotating gear 34 and the external gear ring 31 are meshed to drive the moving slider 32 to move, so as to make the detection device rotate annularly for detection. The fixed vertical rod 35 is used to fix the auxiliary vertical column 36. The auxiliary vertical column 36 is used to make the height adjustment slider 37 move more stably, so as to adjust the position of the detection device to detect different positions.

[0033] The rust detection unit 3 further includes a height adjustment slider 37, a moving push plate 38 and an electric telescopic column 39. A height adjustment slider 37 is slidably connected in the chute on the fixed vertical rod 35. The sliding hole on the height adjustment slider 37 is slidably connected to the corresponding auxiliary vertical column 36. The right surface of the height adjustment slider 37 is fixedly connected to a moving push plate 38. The upper surface of the fixed vertical rod 35 is fixedly connected to the electric telescopic column 39 through a support top plate. The lower end of the electric telescopic column 39 penetrates through the corresponding support top plate and is fixedly connected to the moving push plate 38. The input end of the electric telescopic column 39 is electrically connected to the output end of the external power supply through an external control switch group.

[0034] The height adjustment slider 37 is used to adjust the height to detect different positions. The electric telescopic column 39 is started to push the moving push plate 38 to move. The moving push plate 38 is used to drive the height adjustment slider 37 to move, so as to adjust the height, which is convenient to detect different positions of the piston rod and convenient to use.

[0035] The rust detection unit 3 further includes an electric telescopic column II 310, an arc plate 311, an auxiliary rotating roller 312, a support flat plate 313, and a rust detector 314. The left end surface of the height adjustment slider 37 is fixedly connected to an electric telescopic column II 310. The extended end of the electric telescopic column II 310 is fixedly connected to an arc plate 311. A plurality of annularly arrayed clamping grooves are formed in the arc plate 311. Each clamping groove in the arc plate 311 is rotatably connected to an auxiliary rotating roller 312. The upper end face of the arc plate 311 is fixedly connected to a support flat plate 313. The upper side surface of the support flat plate 313 is fixedly connected to the rust detector 314 through a support frame. The input ends of the electric telescopic column II 310 and the rust detector 314 are electrically connected to the output end of an external power supply through an external control switch group.

[0036] The electric telescopic column II 310 is used to adjust the position of the arc plate 311. The arc plate 311 is used to contact the piston rod for convenient detection. The auxiliary rotating roller 312 is used to make the movement of the arc plate 311 more stable. The support flat plate 313 is used to fix the rust detector 314. The rust detector 314 is used to detect rust, and thus detection is carried out. The rust detector 314 uses an industrial rust detector for detection.

[0037] The clamping and fixing unit 4 includes an adjusting threaded column 41, a clamping arc plate 42, a rotating handrail 43, and a connecting flat plate 44. Four annularly arrayed screw holes are formed in the end face of the I-shaped circular frame 1. The four screw holes respectively extend into the I-shaped circular frame 1. Each screw hole is threadedly connected to an adjusting threaded column 41. A clamping arc plate 42 is arranged on the corresponding side surfaces of the four adjusting threaded columns 41. Each clamping arc plate 42 is rotatably connected to the corresponding adjusting threaded column 41 through a rotating seat. The non-corresponding ends of the four adjusting threaded columns 41 are respectively fixedly connected to a rotating handrail 43. The bottom surface in the I-shaped circular frame 1 is fixedly connected to a connecting flat plate 44 at the positions corresponding to the four adjusting threaded columns 41.

[0038] The rotating handrail 43 is started to drive the adjusting threaded column 41 to rotate. The adjusting threaded column 41 rotates to push the position of the clamping arc plate 42. The clamping arc plate 42 is used to fixedly clamp the hydraulic hoist of the hydropower station, thereby fixing the hydraulic hoist of the hydropower station. The connecting flat plate 44 is used to fix the bidirectional threaded column 45, thereby fixedly clamping the hydraulic hoist of the hydropower station for convenient detection.

[0039] The clamping and fixing unit 4 further includes a bidirectional threaded column 45 and a second moving slider 46. Chutes 1 are respectively formed on the upper side surfaces of the four connecting plates 44. A bidirectional threaded column 45 is rotatably connected in each chute 1. The thread directions on each bidirectional threaded column 45 are opposite. Two equidistant second moving sliders 46 are respectively slidably connected in each chute 1. The threaded holes on each second moving slider 46 are threadedly connected to the corresponding bidirectional threaded column 45. The four bidirectional threaded columns 45 respectively extend to the outside of the corresponding connecting plates 44 and are fixedly clamped to the armrests.

[0040] The bidirectional threaded column 45 rotates to drive the second moving slider 46 to move. The second moving slider 46 moves to adjust the position of the limiting clamping plate 47, thereby facilitating the clamping of the bidirectional threaded column 45 and facilitating the fixing and adjustment of the threaded column 41, and thus for use.

[0041] The clamping and fixing unit 4 further includes a limiting clamping plate 47. A limiting clamping plate 47 is fixedly connected to the upper side surface of each second moving slider 46. The two limiting clamping plates 47 on each connecting plate 44 respectively correspond to the bidirectional threaded column 45.

[0042] The limiting clamping plate 47 is used to clamp the bidirectional threaded column 45. After being adjusted to a suitable position, the bidirectional threaded column 45 is clamped by the limiting clamping plate 47, thereby making the fixation more stable.

[0043] The working principle of a rust detection device for the piston rod of a hydraulic hoist in a hydropower station provided by the present utility model is as follows: First, it is started by rotating the handrail 43 to drive the adjustment threaded column 41 to rotate. When the adjustment threaded column 41 rotates, it is used to push the position of the clamping arc plate 42. The clamping arc plate 42 is used to fixedly clamp the hydraulic hoist in the hydropower station, thereby fixing the hydraulic hoist in the hydropower station. The connecting flat plate 44 is used to fix the bidirectional threaded column 45. Further, the clamping and fixing unit 4 further includes a limit clamping plate 47. A limit clamping plate 47 is fixedly connected to the upper surface of each moving slider two 46. The two limit clamping plates 47 on each connecting flat plate 44 correspond to the bidirectional threaded column 45 respectively. The limit clamping plate 47 is used to clamp the bidirectional threaded column 45. When adjusted to the appropriate position, the bidirectional threaded column 45 is clamped by the limit clamping plate 47 to fix the hydraulic opening and closing in the hydropower station. Then, the annular slide rail 2 is used to drive the moving slider 32 to slide. The power motor 33 is started to drive the rotating gear 34 to rotate. The rotating gear 34 meshes with the external tooth ring 31 to drive the moving slider 32 to move, thereby making the detection device rotate annularly for detection use. The fixed vertical rod 35 is used to fix the auxiliary vertical column 36. The auxiliary vertical column 36 is used to make the height adjustment slider 37 move more stably. The height adjustment slider 37 is used to adjust the height to detect different positions. The electric telescopic column one 39 is started to push the moving push plate 38 to move. The moving push plate 38 is used to drive the height adjustment slider 37 to move, thereby adjusting the height. The electric telescopic column two 310 is used to adjust the position of the arc plate 311. The arc plate 311 is used to contact the piston rod for convenient detection use. The auxiliary rotating roller 312 is used to make the arc plate 311 move more stably. The support flat plate 313 is used to fix the rust detector 314. The rust detector 314 is used to detect rust for detection use.

[0044] It should be noted that in the above embodiments, the core chip of the external control switch group disclosed is a PLC single-chip microcomputer. The power motor 33 is a servo motor, and the rust detector 314 is an industrial rust detector. The external control switch group controls the operation of the power motor 33, the electric telescopic column one 39, the rust detector 314, and the electric telescopic column two 310 using common methods in the prior art.

[0045] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied to other related technical fields, shall be equally included in the patent protection scope of the present utility model.

Claims

1. A device for detecting rust on the piston rod of a hydraulic gate hoist of a hydropower station, characterized in that: It comprises an I-shaped garden frame (1), a rust detection unit (3), and a clamping and fixing unit (4); I-shaped garden frame (1): an annular slide rail (2) is fixedly connected to the upper surface, and a clamping and fixing unit (4) is arranged inside the I-shaped garden frame (1); The rust detection unit (3) comprises an outer gear ring (31), a movable slider (32), a power motor (33), a rotating gear (34), a fixed vertical rod (35) and an auxiliary vertical column (36). The annular slide rail (2) is slidably connected to a movable slider (32). The outer surface of the annular slide rail (2) is fixedly sleeved with an outer gear ring (31). The upper surface of the movable slider (32) is fixedly connected to the power motor (33) through a support frame. The output shaft on the power motor (33) is fixedly connected to an output cylinder. The lower end of the output cylinder passes through the movable slide rail. The movable slider (32) is fixedly connected to a rotating gear (34), the rotating gear (34) is arranged at a position outside the annular slide rail (2), the outer gear ring (31) is meshed with the rotating gear (34), the upper surface of the movable slider (32) is fixedly connected to a fixed vertical rod (35), a slide groove is provided on the fixed vertical rod (35), the slide groove runs through the left and right sides of the fixed vertical rod (35), an auxiliary vertical column (36) is fixedly connected in the slide groove, and the input end of the power motor (33) is electrically connected to the output end of the external power supply through an external control switch group.

2. A device for detecting rust on piston rod of hydraulic gate hoist of a hydropower station according to claim 1, characterized in that: The rust detection unit (3) further comprises a height adjustment slider (37), a movable push plate (38) and an electric telescopic column (39); a height adjustment slider (37) is slidably connected in a slide groove on the fixed vertical rod (35); a slide hole on the height adjustment slider (37) is slidably connected on a corresponding auxiliary vertical column (36); a right side surface of the height adjustment slider (37) is fixedly connected to a movable push plate (38); an upper side surface of the fixed vertical rod (35) is fixedly connected to the electric telescopic column (39) through a supporting top plate; a lower end of the electric telescopic column (39) passes through the corresponding supporting top plate and is fixedly connected to the movable push plate (38); an input end of the electric telescopic column (39) is electrically connected to an output end of an external power supply through an external control switch group.

3. A device for detecting rust on piston rod of hydraulic gate hoist of a hydropower station according to claim 2, characterized in that: The rust detection unit (3) further comprises an electric telescopic column (310), an arc plate (311), an auxiliary rotating roller (312), a support plate (313) and a rust detector (314); the left end surface of the height adjustment slider (37) is fixedly connected to an electric telescopic column (310); the extended end of the electric telescopic column (310) is fixedly connected to an arc plate (311); a plurality of annular array clamping grooves are provided in the arc plate (311); each clamping groove on the arc plate (311) is respectively rotatably connected to the auxiliary rotating roller (312); the upper end surface of the arc plate (311) is fixedly connected to a support plate (313); the upper side surface of the support plate (313) is fixedly connected to the rust detector (314) via a support frame; the input ends of the electric telescopic column (310) and the rust detector (314) are electrically connected to the output end of an external power supply via an external control switch group.

4. A device for detecting rust on piston rod of hydraulic gate hoist of a hydropower station according to claim 1, characterized in that: The clamping and fixing unit (4) comprises an adjusting threaded column (41), a clamping arc plate (42), a rotating handrail (43) and a connecting plate (44). The end surface of the I-shaped garden frame (1) is provided with four screw holes in an annular array, and the four screw holes extend into the I-shaped garden frame (1). Each screw hole is threadedly connected to an adjusting threaded column (41). A clamping arc plate (42) is arranged on a side surface corresponding to the four adjusting threaded columns (41). Each clamping arc plate (42) is rotatably connected to the corresponding adjusting threaded column (41) through a rotating seat. The end surfaces of the four adjusting threaded columns (41) that do not correspond to each other are fixedly connected to a rotating handrail (43). The bottom end surface in the I-shaped garden frame (1) is located at a position corresponding to the four adjusting threaded columns (41) and is fixedly connected to a connecting plate (44).

5. A device for detecting rust on piston rod of hydraulic gate hoist of a hydropower station according to claim 4, characterized in that: The clamping and fixing unit (4) further comprises a bidirectional threaded column (45) and a second movable slider (46). The upper surfaces of the four connecting plates (44) are respectively provided with a first slide groove. A bidirectional threaded column (45) is rotatably connected in each slide groove. The threads on each bidirectional threaded column (45) are in opposite directions. Two equally spaced second movable sliders (46) are slidably connected in each slide groove. The screw hole on each second movable slider (46) is threadedly connected to the corresponding bidirectional threaded column (45). The four bidirectional threaded columns (45) respectively extend to the outside of the corresponding connecting plates (44) and are fixedly connected to the handrail.

6. A device for detecting rust on piston rod of hydraulic gate hoist of a hydropower station according to claim 5, characterized in that: The clamping and fixing unit (4) further comprises a limit clamping plate (47), and the upper surface of each movable sliding block (46) is respectively fixedly connected to a limit clamping plate (47), and the two limit clamping plates (47) on each connecting flat plate (44) respectively correspond to the bidirectional threaded columns (45).

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