Guide vane opening sensor

Abstract

The invention discloses a guide vane opening sensor, and relates to the technical field of water turbine guide vanes, the guide vane opening sensor comprises a bottom plate, the outer wall of the top of the bottom plate is provided with equidistantly distributed mounting blocks, the outer walls of the tops of the mounting blocks are provided with telescopic grooves matched with the mounting blocks, the inner walls of the telescopic grooves are slidably provided with telescopic rods, and the telescopic rods are of cylindrical structures. According to the invention, the interior of the telescopic groove is inflated to enable the telescopic rod to jack the measuring block to the tail end, the device is placed at the position of the guide vane, the guide vane is jacked through the measuring block, the measuring block is extruded along with the change of the span when the guide vane is started, and the measuring block gradually slides along the top of the measuring plate under the action of the pressure along with the increase of the pressure of the guide vane. Scale data on the measuring block and the dial represent span data of the guide vane, compared with manual judgment of the opening condition of the guide vane, the measuring block and the dial are matched with each other, the opening data of the guide vane are specified, the opening condition of the guide vane can be judged conveniently, and the working condition of a machine can be known in time for corresponding processing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water turbine guide vane, in particular to a guide vane opening degree sensor. BACKGROUND

[0002] The water turbine guide vane is a core component of the water turbine generator set water guide mechanism, mainly used for adjusting and controlling the water flow and flow rate entering the runner, which is mainly composed of a hollow airfoil guide vane body, two ends of which are welded with stainless steel end plates, the water inlet side is stacked with stainless steel, and the water outlet side is welded with stainless steel strips. The guide vane plays a role in controlling the flow and flow rate of the water turbine in the water turbine set, which directly affects the efficiency and stability of the unit. By adjusting the opening degree of the guide vane, power regulation and water head control can be achieved. In order to achieve power regulation and water head control, the opening degree of the guide vane needs to be known in time so as to adjust the machine in time.

[0003] However, the existing technology has certain deficiencies in judging the opening degree of the guide vane:

[0004] One of the existing technologies for judging the opening degree of the guide vane is to directly observe by the operator, but this method has certain disadvantages:

[0005] Firstly, due to the obstruction of other machine components, there is certain limitation in observing the opening degree of the water turbine, and the opening degree cannot be observed comprehensively;

[0006] Secondly, due to different station or posture, there is a large error between the visual observation and the actual situation, which affects the judgment of the opening degree of the guide vane;

[0007] Finally, visual observation has high requirements for the professional technology of the judgment personnel, and is not suitable for daily observation. SUMMARY

[0008] The purpose of the present application is to provide a guide vane opening degree sensor to solve the problems in the background art.

[0009] In order to achieve the above purpose, the present application provides the following technical scheme: a guide vane opening degree sensor, comprising a bottom plate, the top outer wall of the bottom plate is provided with installation blocks distributed at equal distances, the top outer wall of each installation block is provided with a telescopic slot matched therewith, a telescopic rod is slidably installed in the inner wall of the telescopic slot, the telescopic rod is of a cylindrical structure, the telescopic slot is of a square structure, the telescopic rod is matched with the telescopic slot, a connecting rod is arranged at the end of the telescopic rod, a measuring block is connected to the end of the connecting rod, the connecting rod is matched with the measuring block, a measuring plate is welded to the outer wall of one side of the bottom plate, the measuring block is slidably connected to the outer wall of the measuring plate, a scale disc is arranged at the top outer wall of each end of the measuring plate, scale lines are sprayed on the scale disc at equal distances, the scale disc is matched with the measuring plate, and the length of the scale disc is less than the length of the measuring plate.

[0010] Preferably, a moving groove is arranged in the middle of the top outer wall of the measuring plate, the moving groove is matched with the dial, the dial is arranged on both sides of the moving groove, a moving block is arranged in the middle of the bottom outer wall of the measuring block, and the moving block is slidably connected with the inner wall of the moving groove.

[0011] Preferably, a control disc is slidably arranged on the inner wall of the telescopic groove, the control disc is circular, the control disc is matched with the telescopic groove, springs are arranged on the outer wall of the control disc, a connecting disc is arranged on one end of the telescopic rod close to the control disc, the connecting disc is matched with the control disc, the end of the spring is connected with the connecting disc, and the elastic force of the spring is greater than the friction force between the connecting disc and the telescopic groove.

[0012] Preferably, pressure sensors are arranged on the outer wall of the connecting disc, the pressure sensors are matched with the springs, the pressure sensors are arranged in the springs, a piston is arranged on the outer wall of the control disc away from the spring, the piston is matched with the control disc, and the thickness of the piston is less than the thickness of the control disc.

[0013] Preferably, a base is arranged at the end of the telescopic groove, the base is matched with the telescopic groove, an inflation pipe is arranged on the outer wall of the base away from the telescopic groove, a micro air pump is arranged on the outer wall of the inflation pipe, the micro air pump is matched with the inflation pipe, and the inflation pipe penetrates into the telescopic groove.

[0014] Preferably, air outlet pipes are arranged on the outer wall of the telescopic groove close to the base, and electric control valves matched with the air outlet pipes are arranged on the outer wall of the air outlet pipes.

[0015] Preferably, the pressure sensors are connected with a PLC controller through a wireless network, the PLC controller is connected with the electric control valves through wires, and the PLC controller is arranged in the base.

[0016] Preferably, fixed grooves are arranged on the top outer wall of the mounting block at equal distances, fixed blocks are arranged on the bottom outer wall of the telescopic groove at equal distances, and the fixed blocks are matched with the fixed grooves.

[0017] Preferably, mounting holes are arranged on the outer wall of the fixed block and the inner wall of the fixed groove at both ends, mounting bolts are arranged in the mounting holes in a threaded mode, and the length of the mounting bolts is greater than the thickness of the fixed block.

[0018] Preferably, a non-slip pad is arranged on the outer wall of the measuring block away from the connecting rod, the non-slip pad is matched with the measuring block, and the thickness of the non-slip pad is less than the thickness of the measuring block.

[0019] In summary, the present application has the following technical effects and advantages:

[0020] In the application, when working, the inside of the telescopic groove is inflated to make the telescopic rod slide along the inner wall of the telescopic groove to top the measuring block to the end, then the device is placed in the guide vane position, the guide vane is topped by the measuring block, when the guide vane is started, the guide vane extrudes the measuring block with the change of the span, with the increase of the pressure of the guide vane, the measuring block slides along the top of the measuring plate under the action of the pressure, since the bottom outer wall of the measuring block is in contact with the top outer wall of the measuring plate, therefore, the scale data on the dial at the bottom of the measuring block represents the opening data of the guide vane, compared with the artificial judgment of the guide vane opening, the guide vane opening data is concretized through the cooperation of the measuring block and the dial, which is convenient for judging the guide vane opening and can understand the working condition of the machine in time and make corresponding treatment.

[0021] In the application, during the extrusion of the guide vane to the measuring block, the pressure received by the measuring block is gradually transmitted to the connecting disc, at this time, the connecting disc extrudes the spring, with the contraction of the spring under the pressure, the pressure sensor gradually approaches the control disc and contacts with it, with the increase of the pressure, the pressure received by the pressure sensor gradually increases, when the pressure reaches a certain limit, the telescopic groove timely exhausts to reduce the air pressure inside the telescopic groove, with the decrease of the air pressure inside the telescopic groove, the telescopic rod gradually contracts under the pressure of the measuring block, at this time, the movement of the measuring block on the measuring plate feeds back the opening data of the guide vane, when the guide vane stops extruding, the telescopic groove continues to exhaust, the control disc continues to move under the action of the spring force, at this time, the control disc is separated from the pressure sensor, when the pressure sensor no longer feeds back the pressure data, the exhaust is stopped, the air inside the telescopic groove is kept, through the cooperation of the spring and the pressure sensor, the exhaust amount of the telescopic groove is accurately controlled, so that the guide vane opening measurement is more accurate, since the spring force is greater than the friction between the connecting disc and the telescopic groove, under the condition that no external force is applied, the spring can push the connecting disc and the telescopic rod to move and itself will not be deformed, at the same time, during the working of the device, due to the influence of the pressure of the guide vane and the air pressure inside the telescopic groove, the spring will not repeatedly rebound after being deformed under the pressure or recovering from the deformation, therefore, it is not necessary to set a damper to apply damping to the spring. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a schematic diagram of the appearance structure of the main body of the application;

[0023] Figure 2 It is a schematic diagram of the movement state structure of the measuring block of the application;

[0024] Figure 3 It is a schematic diagram of the dial structure of the application;

[0025] Figure 4 It is a schematic diagram of the spring structure of the application;

[0026] Figure 5 It is a schematic diagram of the pressure sensor structure of the application;

[0027] Figure 6 The appearance structure diagram of the telescopic rod and the telescopic slot of the present application.

[0028] In the figure: 1, bottom plate; 2, mounting block; 3, telescopic slot; 4, telescopic rod; 5, connecting rod; 6, measuring block; 7, measuring plate; 8, dial; 9, moving slot; 10, non-slip pad; 11, control disc; 12, spring; 13, pressure sensor; 14, piston; 15, base; 16, inflation tube; 17, miniature air pump; 18, air outlet tube; 19, electric control valve; 20, fixing slot; 21, fixing block; 22, mounting bolt. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0030] Reference Figures 1-6 The guide vane opening sensor shown includes a bottom plate 1, the top outer wall of the bottom plate 1 is provided with mounting blocks 2 distributed at equal distances, the top outer wall of each mounting block 2 is provided with a telescopic slot 3 matched therewith, the telescopic slot 3 is internally provided with a telescopic rod 4 slidingly installed, the telescopic rod 4 is of a cylindrical structure, the telescopic slot 3 is of a square structure, the telescopic rod 4 is matched with the telescopic slot 3, the telescopic rod 4 is provided with a connecting rod 5 at the end thereof, the connecting rod 5 is connected with a measuring block 6 at the end thereof, the connecting rod 5 is matched with the measuring block 6, a measuring plate 7 is welded to one side outer wall of the bottom plate 1, the measuring block 6 is slidingly connected with the outer wall of the measuring plate 7, the top outer wall of the measuring plate 7 is provided with dials 8 at both ends thereof, the dials 8 are sprayed with scale lines distributed at equal distances, the dials 8 are matched with the measuring plate 7, and the length of the dials 8 is less than the length of the measuring plate 7.

[0031] Through the above structure: when working, the telescopic slot 3 is inflated to make the telescopic rod 4 slide along the inner wall of the telescopic slot 3 to top the measuring block 6 to the end, then the device is placed at the guide vane position, the guide vane is topped by the measuring block 6, when the guide vane is started, the guide vane is pressed against the measuring block 6 with the change of the span thereof, with the increase of the pressure of the guide vane, the measuring block 6 is gradually slid along the top of the measuring plate 7 under the action of the pressure, since the bottom outer wall of the measuring block 6 is in contact with the top outer wall of the measuring plate 7, therefore, the scale data of the bottom of the measuring block 6 on the dial 8 represents the span data of the guide vane, compared with the manual judgment of the guide vane opening condition, through the cooperation of the measuring block 6 and the dial 8, the guide vane opening data is specified, which is convenient for judging the guide vane opening condition, can timely understand the working condition of the machine and perform corresponding treatment.

[0032] AsFigure 2 As shown in the figure, the measuring plate 7 is provided with a moving groove 9 in the middle of the top outer wall, the moving groove 9 is matched with the scale disc 8, the scale disc 8 is located on both sides of the moving groove 9, the measuring block 6 is provided with a moving block in the middle of the bottom outer wall, the moving block is slidingly connected with the inner wall of the moving groove 9, the measuring block 6 is provided with a non-slip pad 10 on the outer wall of the side away from the connecting rod 5, the non-slip pad 10 is matched with the measuring block 6, the thickness of the non-slip pad 10 is less than the thickness of the measuring block 6, the measuring block 6 is slidingly connected with the moving groove 9, the measuring block 6 will slide along the inner wall of the moving groove 9 when it is pressed, the non-slip pad 10 protects the measuring block 6 to prevent its outer wall from being worn under the extrusion of the guide vane.

[0033] As shown in the figure, Figure 5 The control disc 11 is slidingly installed in the inner wall of the telescopic groove 3, the control disc 11 is circular, the control disc 11 is matched with the telescopic groove 3, the control disc 11 is provided with a spring 12 on the outer wall, the telescopic rod 4 is provided with a connecting disc on the end close to the control disc 11, the connecting disc is matched with the control disc 11, the end of the spring 12 is connected with the connecting disc, the elastic force of the spring 12 is greater than the friction between the connecting disc and the telescopic groove 3, the connecting disc is provided with a pressure sensor 13 on the outer wall, the pressure sensor 13 is matched with the spring 12, the pressure sensor 13 is located inside the spring 12, the control disc 11 is provided with a piston 14 on the outer wall of the side away from the spring 12, the piston 14 is matched with the control disc 11, the thickness of the piston 14 is less than the thickness of the control disc 11, in the process of the guide vane extruding the measuring block 6, the pressure of the measuring block 6 is gradually transmitted to the connecting disc, at this time the connecting disc extrudes the spring 12, with the spring 12 being pressed and contracted, the pressure sensor 13 gradually approaches the control disc 11 and contacts it, with the increase of the pressure, the pressure of the pressure sensor 13 gradually increases, when the pressure reaches a certain limit, the telescopic groove 3 timely exhausts to reduce the air pressure inside the telescopic groove 3, with the decrease of the air pressure inside the telescopic groove 3, the telescopic rod 4 gradually contracts under the pressure of the measuring block 6, at this time the measuring block 6 moves on the measuring plate 7 to feedback the guide vane opening data, when the guide vane stops extruding, the telescopic groove 3 continues to exhaust, the control disc 11 continues to move under the elastic force of the spring 12, at this time the control disc 11 is separated from the pressure sensor 13, when the pressure sensor 13 no longer feedbacks the pressure data, the exhaust stops, the amount of air inside the telescopic groove 3 is maintained, through the cooperation of the spring 12 and the pressure sensor 13, the exhaust amount of the telescopic groove 3 is accurately controlled, so that the guide vane opening measurement is more accurate, because the elastic force of the spring 12 is greater than the friction between the connecting disc and the telescopic groove 3, therefore, without external force, the spring 12 can push the connecting disc and the telescopic rod 4 to move and itself will not deform, at the same time, during the work of the device, due to the influence of the pressure of the guide vane and the air pressure inside the telescopic groove 3, after the spring 12 is deformed under pressure or restores, it will not repeatedly rebound, therefore, there is no need to set a damper to apply damping to the spring 12.

[0034] As shown in the figure, Figure 1As shown, a base 15 is provided at the end of the telescopic groove 3. The base 15 is adapted to the telescopic groove 3. An inflation pipe 16 is provided on the outer wall of the base 15 away from the telescopic groove 3. A miniature air pump 17 is provided on the outer wall of the inflation pipe 16. The miniature air pump 17 is adapted to the inflation pipe 16. The inflation pipe 16 leads into the interior of the telescopic groove 3. An air outlet pipe 18 is provided on the outer wall of the top of the telescopic groove 3 near the base 15. An electrically controlled valve 19 adapted to the air outlet pipe 18 is installed on the outer wall of the air outlet pipe 18. The pressure sensor 13 is connected to a PLC via a wireless network. The controller, a PLC controller, is connected to the electric control valve 19 via wires. The PLC controller is installed inside the base 15. When the device is working, the micro air pump 17 inflates the telescopic groove 3, thereby driving the telescopic rod 4 to move the measuring block 6 to the initial position at the very end of the measuring plate 7. When the measuring block 6 is under pressure, the electric control valve 19 opens when the pressure sensor 13 reaches the critical value, thereby completing the venting work. This makes it easier for the telescopic rod 4 and the measuring block 6 to retract and measure the guide vane opening data, making the operation more convenient.

[0035] like Figure 3 As shown, the top outer wall of the mounting block 2 is provided with equally spaced fixing grooves 20, and the bottom outer wall of the telescopic groove 3 is provided with equally spaced fixing blocks 21. The fixing blocks 21 are adapted to the fixing grooves 20. The outer wall of the fixing blocks 21 and the bottom inner wall of the fixing groove 20 are provided with mounting holes at both ends. The mounting holes are threaded with mounting bolts 22. The length of the mounting bolts 22 is greater than the thickness of the fixing blocks 21. The connection between the fixing grooves 20 and the fixing blocks 21 facilitates the installation of the telescopic groove 3 and the mounting block 2.

[0036] Working principle of this invention:

[0037] During operation, the telescopic groove 3 is inflated, causing the telescopic rod 4 to slide along the inner wall of the telescopic groove 3, thereby pushing the measuring block 6 to its end. Then, the device is placed in the guide vane position, and the measuring block 6 holds the guide vane in place. When the guide vane is activated, it compresses the measuring block 6 as its span changes. As the pressure of the guide vane increases, the measuring block 6 gradually slides along the top of the measuring plate 7 under pressure. Since the bottom outer wall of the measuring block 6 is in contact with the top outer wall of the measuring plate 7, the scale data on the dial 8 at the bottom of the measuring block 6 represents the opening data of the guide vane. Compared with manual judgment of the guide vane opening, the measuring block 6 and the dial 8 work together to specify the guide vane opening data, making it easier to judge the guide vane opening and to understand the machine's working status in a timely manner and take appropriate action. The measuring block 6 is slidably connected to the moving groove 9. When the measuring block 6 is pressed, it will slide along the inner wall of the moving groove 9. The anti-slip pad 10 protects the measuring block 6 to prevent its outer wall from being worn under the pressure of the guide vane.

[0038] During the process of the guide vane pressing the measuring block 6, the pressure on the measuring block 6 is gradually transmitted to the connecting disc, at this time, the connecting disc presses the spring 12, with the spring 12 shrinking under pressure, the pressure sensor 13 gradually approaches and contacts the control disc 11, with the increase of pressure, the pressure sensor 13 gradually increases under pressure, when the pressure reaches a certain limit, the telescopic slot 3 timely exhausts to reduce the air pressure inside the telescopic slot 3, with the decrease of the air pressure inside the telescopic slot 3, the telescopic rod 4 gradually shrinks under the pressure of the measuring block 6, at this time, the measuring block 6 moves on the measuring plate 7 to feedback the guide vane opening data, when the guide vane stops pressing, the telescopic slot 3 continues to exhaust, the control disc 11 continues to move under the elastic force of the spring 12, at this time, the control disc 11 is separated from the pressure sensor 13, when the pressure sensor 13 no longer feedbacks the pressure data, the exhaust is stopped, the air amount inside the telescopic slot 3 is maintained, through the cooperation of the spring 12 and the pressure sensor 13, the exhaust amount of the telescopic slot 3 is accurately controlled, so that the guide vane opening measurement is more accurate, since the elastic force of the spring 12 is greater than the friction between the connecting disc and the telescopic slot 3, under the condition that no external force is applied, the spring 12 can push the connecting disc and the telescopic rod 4 to move and itself will not be deformed, at the same time, during the working of the device, due to the influence of the pressure of the guide vane and the air pressure inside the telescopic slot 3, the spring 12 will not repeatedly rebound after being deformed under pressure or recovering from deformation, therefore, it is not necessary to set a damper to apply damping to the spring 12.

[0039] During the working of the device, the micro air pump 17 fills air into the telescopic slot 3 to drive the telescopic rod 4 to move and move the measuring block 6 to the last end initial position of the measuring plate 7, when the measuring block 6 is pressed, the electric control valve 19 is opened when the pressure sensor 13 reaches the critical value under pressure to complete the exhaust work, so as to facilitate the contraction of the telescopic rod 4 and the measuring block 6 to measure the guide vane opening data, and the operation is more convenient.

[0040] Finally, it should be noted that: the above is only the preferred embodiment of the present application and is not used to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced equivalently, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A vane opening sensor comprising a base plate (1), characterized in that: The outer wall of the top of the bottom plate (1) is provided with mounting blocks (2) distributed at equal distances, the outer wall of the top of the mounting blocks (2) is provided with elastic grooves (3) matched therewith, the inner wall of the elastic grooves (3) is slidably provided with elastic rods (4), the elastic rods (4) are of cylindrical structure, the elastic grooves (3) are of square structure, the elastic rods (4) are matched with the elastic grooves (3), the ends of the elastic rods (4) are provided with connecting rods (5), the ends of the connecting rods (5) are connected with measuring blocks (6), the connecting rods (5) are matched with the measuring blocks (6), the outer wall of one side of the bottom plate (1) is welded with a measuring plate (7), the outer wall of the measuring block (6) is slidably connected with the measuring plate (7), the outer wall of the top of the measuring plate (7) is provided with scale discs (8) at both ends, the scale discs (8) are sprayed with scale lines distributed at equal distances, the scale discs (8) are matched with the measuring plate (7), and the length of the scale disc (8) is less than that of the measuring plate (7).

2. The wicket gate opening sensor according to claim 1, characterized in that: The outer wall of the top of the bottom plate (1) is provided with mounting blocks (2) distributed at equal distances, the outer wall of the top of the mounting blocks (2) is provided with elastic grooves (3) matched therewith, the inner wall of the elastic grooves (3) is slidably provided with elastic rods (4), the elastic rods (4) are of cylindrical structure, the elastic grooves (3) are of square structure, the elastic rods (4) are matched with the elastic grooves (3), the ends of the elastic rods (4) are provided with connecting rods (5), the ends of the connecting rods (5) are connected with measuring blocks (6), the connecting rods (5) are matched with the measuring blocks (6), the outer wall of one side of the bottom plate (1) is welded with a measuring plate (7), the outer wall of the measuring block (6) is slidably connected with the measuring plate (7), the outer wall of the top of the measuring plate (7) is provided with scale discs (8) at both ends, the scale discs (8) are sprayed with scale lines distributed at equal distances, the scale discs (8) are matched with the measuring plate (7), and the length of the scale disc (8) is less than that of the measuring plate (7).

3. The wicket gate opening sensor according to claim 2, characterized in that: The inner wall of the elastic grooves (3) is slidably provided with a control disc (11), the control disc (11) is circular, the control disc (11) is matched with the elastic grooves (3), the outer wall of the control disc (11) is provided with springs (12), one end of the elastic rod (4) close to the control disc (11) is provided with a connecting disc, the connecting disc is matched with the control disc (11), the end of the spring (12) is connected with the connecting disc, and the elastic force of the spring (12) is greater than the friction force between the connecting disc and the elastic grooves (3).

4. The wicket gate opening sensor according to claim 3, characterized in that: The outer wall of the connecting disc is provided with pressure sensors (13), the pressure sensors (13) are matched with the springs (12), the pressure sensors (13) are located inside the springs (12), the outer wall of the side of the control disc (11) away from the spring (12) is provided with a piston (14), the piston (14) is matched with the control disc (11), and the thickness of the piston (14) is less than that of the control disc (11).

5. The wicket gate opening sensor of claim 4, wherein: The end of the elastic grooves (3) is provided with a base (15), the base (15) is matched with the elastic grooves (3), the outer wall of the side of the base (15) away from the elastic grooves (3) is provided with an inflation tube (16), the outer wall of the inflation tube (16) is provided with a micro air pump (17), the micro air pump (17) is matched with the inflation tube (16), and the inflation tube (16) penetrates into the inside of the elastic grooves (3).

6. The wicket gate opening sensor of claim 5, wherein: The outer wall of the top of the bottom plate (1) is provided with mounting blocks (2) distributed at equal distances, the outer wall of the top of the mounting blocks (2) is provided with elastic grooves (3) matched therewith, the inner wall of the elastic grooves (3) is slidably provided with elastic rods (4), the elastic rods (4) are of cylindrical structure, the elastic grooves (3) are of square structure, the elastic rods (4) are matched with the elastic grooves (3), the ends of the elastic rods (4) are provided with connecting rods (5), the ends of the connecting rods (5) are connected with measuring blocks (6), the connecting rods (5) are matched with the measuring blocks (6), the outer wall of one side of the bottom plate (1) is welded with a measuring plate (7), the outer wall of the measuring block (6) is slidably connected with the measuring plate (7), the outer wall of the top of the measuring plate (7) is provided with scale discs (8) at both ends, the scale discs (8) are sprayed with scale lines distributed at equal distances, the scale discs (8) are matched with the measuring plate (7), and the length of the scale disc (8) is less than that of the measuring plate (7).

7. The wicket gate opening sensor of claim 6, wherein: The outer wall of the top of the bottom plate (1) is provided with mounting blocks (2) distributed at equal distances, the outer wall of the top of the mounting blocks (2) is provided with elastic grooves (3) matched therewith, the inner wall of the elastic grooves (3) is slidably provided with elastic rods (4), the elastic rods (4) are of cylindrical structure, the elastic grooves (3) are of square structure, the elastic rods (4) are matched with the elastic grooves (3), the ends of the elastic rods (4) are provided with connecting rods (5), the ends of the connecting rods (5) are connected with measuring blocks (6), the connecting rods (5) are matched with the measuring blocks (6), the outer wall of one side of the bottom plate (1) is welded with a measuring plate (7), the outer wall of the measuring block (6) is slidably connected with the measuring plate (7), the outer wall of the top of the measuring plate (7) is provided with scale discs (8) at both ends, the scale discs (8) are sprayed with scale lines distributed at equal distances, the scale discs (8) are matched with the measuring plate (7), and the length of the scale disc (8) is less than that of the measuring plate (7).

8. The wicket gate opening sensor of claim 1, wherein: The outer wall of the top of the mounting block (2) is provided with equidistantly distributed fixing grooves (20), the outer wall of the bottom of the telescopic groove (3) is provided with equidistantly distributed fixing blocks (21), and the fixing blocks (21) are matched with the fixing grooves (20).

9. The wicket gate opening sensor of claim 8, wherein: Mounting holes are formed in the outer wall of the fixing blocks (21) and the inner wall of the bottom of the fixing grooves (20) at both ends, mounting bolts (22) are mounted in the mounting holes in a threaded mode, and the length of the mounting bolts (22) is greater than the thickness of the fixing blocks (21).

10. The wicket gate opening sensor of claim 1, wherein: The outer wall of the side, away from the connecting rod (5), of the measuring block (6) is provided with a non-slip pad (10), the non-slip pad (10) is matched with the measuring block (6), and the thickness of the non-slip pad (10) is less than the thickness of the measuring block (6).

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