Head sheave encircling angle measuring scale

Abstract

The utility model discloses a head sheave embracing angle measuring scale which comprises a protractor, a fixed shaft is arranged at the central point position of the protractor, two rotating seats are connected to the fixed shaft through damping sleeves, the rotating seats are located on the back side of the protractor, adjusting plates are arranged on the rotating seats, sliding seats are arranged on the adjusting plates, and the sliding seats are connected with the protractor. The utility model relates to the technical field of head sheave embracing angle measurement, after the fixed shaft is centered with the central shaft of a head sheave to be measured, the adjusting plate is rotated, so that the scale plate is aligned with a steel wire rope in parallel; a calibration point at the connecting position of the scale plate and the adjusting plate just coincides with the tangent point position of the steel wire rope and the head sheave; after alignment, the mounting seat is rotated, so that laser emitted by the laser emitter on the mounting seat irradiates a calibration point on the scale plate; at the moment, the included angle between the laser rays emitted by the two laser emitters is the surrounding angle between the head sheave and the steel wire rope.

Description

Technical Field

[0001] The utility model relates to the technical field of sky wheel embracing angle measurement, in particular to a sky wheel embracing angle measuring ruler. Background Art

[0002] As mining continues to expand deeper into mines, large floor-standing friction hoists have become a crucial component of hoisting equipment. The head sheave is a key component of the friction hoist's operating system. Installed at the top of the derrick, it serves as a fixed pulley that adjusts the direction of the wire rope. It supports the wire rope connecting the hoist drum and the container and guides its direction. It bears the weight of the container, the hoisted load, and the wire rope. The proper operation of the head sheave directly impacts hoisting production. The wrap angle refers to the circumferential angle formed by the contact surface of the winch wire rope on the head sheave. The head sheave wrap angle plays a crucial role in mine hoisting systems, directly affecting the force applied to the wire rope and the hoisting system's stability. In the prior art, the head sheave wrap angle is typically measured using a protractor. However, due to the relatively short ends of the protractor, the wire rope's tangent point as it passes through the head sheave deviates from the center of the circle, resulting in inaccurate measurements of the wrap angle between the head sheave and the wire rope. In light of this, in-depth research into this issue led to the present case. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a head wheel encirclement angle measuring ruler, which solves the problems raised in the background technology.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: a top wheel encloses an angle measuring ruler, including a protractor, a fixed axis is provided at the center point of the protractor, two rotating seats are connected to the fixed axis through a damping sleeve, the rotating seat is located on the back side of the protractor, an adjustment plate is provided on the rotating seat, a sliding seat is provided on the adjustment plate, a scale plate is fixed on one side of the sliding seat, one end edge of the scale plate extends into the front side of the protractor and a calibration point is provided at the center of the exposed part, the angle between the scale plate and the adjustment plate is 90°, a limited locking component is provided on the sliding seat, two mounting seats are connected to the fixed axis through a damping sleeve, the mounting seat is located on the front side of the protractor, and a laser emitter is provided on the mounting seat.

[0005] The fixed shaft is located at one end of the back side of the protractor and is provided with a fixed seat. A strong magnetic disc is embedded in the fixed seat. The strong magnetic disc is coaxially arranged with the fixed shaft and the fixed seat.

[0006] The above-mentioned limit locking component includes a compression spring, a slider and a spherical head. Hemispherical positioning blind holes are evenly arranged on the front wall of the adjustment plate along its length direction. An installation blind hole is opened on the inner side of the sliding seat. The compression spring is arranged in the installation blind hole. The slider is slidably inserted in the installation blind hole and connected to the compression spring. The spherical head is fixed on the exposed end of the slider.

[0007] Scale lines are arranged on the front wall surface of the adjustment plate.

[0008] The utility model provides a sheave angle measuring ruler. The ruler has the following beneficial effects: the ruler improves the existing protractor, sets a fixed axis at the center point of the protractor, and is respectively connected to two rotating seats and two mounting seats with damping. The two rotating seats are mounted with scale plates via adjustment plates. When in use, after aligning the fixed axis with the center axis of the sheave to be measured, the scale plate is pulled so that the distance between the scale plate and the fixed axis matches the sheave radius. The adjustment plate is rotated so that the scale plate is aligned parallel to the wire rope. The calibration point at the connection position between the scale plate and the adjustment plate coincides with the tangent point of the wire rope and the sheave. After alignment, the mounting seat is rotated so that the laser emitted by the laser emitter on the mounting seat is irradiated onto the calibration point on the scale plate. At this time, the angle between the laser beams emitted by the two laser emitters is the encircling angle between the sheave and the wire rope. The ruler has a sophisticated design, is easy to operate, has high measurement accuracy, and is applicable to the measurement of encircling angles of sheaves of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the three-dimensional structure of the head wheel angle measuring ruler described in the present utility model.

[0010] Figure 2 This is a schematic diagram of the axonometric structure of the head wheel angle measuring ruler described in the present utility model.

[0011] Figure 3 For this utility model Figure 1 Schematic diagram of the main structure.

[0012] Figure 4 For this utility model Figure 3 Schematic diagram of the partial cross-section structure.

[0013] In the figure: 1. Protractor; 2. Fixed shaft; 3. Damping sleeve; 4. Rotating seat; 5. Adjustment plate; 6. Sliding seat; 7. Scale plate; 8. Calibration point; 9. Damping sleeve; 10. Mounting seat; 11. Laser transmitter; 12. Fixed seat; 13. Strong magnetic disc; 14. Compression spring; 15. Slider; 16. Ball head. DETAILED DESCRIPTION

[0014] 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.

[0015] Example: In conjunction with the specification Figure 1-4 It can be seen that the present application specifically designs a top wheel angle measuring ruler, a fixed shaft 2 is provided at the center point of the protractor 1, two rotating seats 4 are connected to the fixed shaft 2 through a damping sleeve 3, the rotating seat 4 is located on the back side of the protractor 1, an adjusting plate 5 is provided on the rotating seat 4, a sliding seat 6 is provided on the adjusting plate 5, a scale plate 7 is fixed on one side of the sliding seat 6, one end edge of the scale plate 7 extends into the front side of the protractor 1 and a calibration point 8 is provided at the center of the exposed part, the angle between the scale plate 7 and the adjusting plate 5 is 90°, a limited locking component is provided on the sliding seat 6, the fixed shaft 2 is connected to two mounting seats 10 through a damping sleeve 9, the mounting seat 10 is located on the front side of the protractor 1, and a laser emitter 11 is provided on the mounting seat 10. The existing protractor 1 is improved by providing a fixed shaft 2 at the center point of the protractor 1, and damping sleeves 9 are provided on the fixed shaft 2. It is connected to two rotating seats 4 and two mounting seats 10, and scale plates 7 are installed on the two rotating seats 4 through adjusting plates 5. When in use, after aligning the fixed shaft 2 with the central axis of the sheave to be measured, pull the scale plate 7 so that the distance between the scale plate 7 and the fixed shaft 2 matches the radius of the sheave, and rotate the adjusting plate 5 so that the scale plate 7 is parallel to the wire rope; the calibration point 8 at the connection position of the scale plate 7 and the adjusting plate 5 coincides with the tangent point position of the wire rope and the sheave; after alignment, rotate the mounting seat 10 so that the laser emitted by the laser emitter 11 on the mounting seat 10 is irradiated on the calibration point 8 on the scale plate 7; at this time, the angle between the laser rays emitted by the two laser emitters 11 is the embrace angle between the sheave and the wire rope. The measuring ruler is sophisticated in design, easy to operate, has high measurement accuracy, and is applicable to the measurement of the embrace angle of sheaves of different sizes and models.

[0016] During the specific implementation process, as a preferred setting, the above-mentioned fixed shaft 2 is provided with a fixed seat 12 at one end on the back side of the protractor 1, and a strong magnetic disc 13 is embedded in the fixed seat 12. The strong magnetic disc 13 is coaxially arranged with the fixed shaft 2 and the fixed seat 12, which facilitates the fixation of the protractor 1 on one end of the sky wheel mounting shaft, thereby improving the measurement efficiency.

[0017] During the specific implementation process, as a preferred setting, the above-mentioned limit locking component includes a compression spring 14, a slider 15 and a spherical head 16. Hemispherical positioning blind holes are evenly opened on the front wall of the adjustment plate 5 along its length direction, and an installation blind hole is opened on the inner side of the sliding seat 6. The compression spring 14 is set in the installation blind hole, and the slider 15 is slidably inserted in the installation blind hole and connected to the compression spring 14. The spherical head 16 is fixed on the exposed end of the slider 15. When in use, according to the radius of the sheave to be measured, the sliding seat 6 on the sliding adjustment plate 5 is slid so that the distance between the scale plate 7 and the center point of the protractor 1 matches the radius of the sheave. The compression spring 14 pushes the spherical head 16 at one end of the slider 15 out and snaps it into the corresponding hemispherical positioning blind hole to achieve temporary limiting of the sliding seat 6.

[0018] In the specific implementation process, as a preferred setting, scale lines are set on the front wall of the above-mentioned adjustment plate 5 to facilitate precise adjustment of the position of the sliding seat 6.

[0019] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A ruler for measuring the angle of a sheave, including a protractor, characterized in that: A fixed shaft is provided at the center point of the protractor, and two rotating seats are connected to the fixed shaft through a damping sleeve. The rotating seat is located on the back side of the protractor, and an adjustment plate is provided on the rotating seat. A sliding seat is provided on the adjustment plate. A scale plate is fixed to one side of the sliding seat, and an edge of one end of the scale plate extends into the front side of the protractor and a calibration point is provided at the center of the exposed part. The angle between the scale plate and the adjustment plate is 90°. A limited locking component is provided on the sliding seat, and two mounting seats are connected to the fixed shaft through a damping shaft sleeve. The mounting seat is located on the front side of the protractor, and a laser emitter is provided on the mounting seat.

2. The sky wheel embrace angle measuring ruler according to claim 1, characterized in that: The fixed shaft is located at one end of the back side of the protractor and is provided with a fixed seat. A strong magnetic disc is embedded in the fixed seat. The strong magnetic disc is coaxially arranged with the fixed shaft and the fixed seat.

3. The sheave angle measuring ruler according to claim 1, characterized in that: The limit locking component includes a compression spring, a slider and a spherical head. Hemispherical positioning blind holes are evenly arranged on the front wall of the adjustment plate along its length direction. A mounting blind hole is opened on the inner side of the sliding seat. The compression spring is arranged in the mounting blind hole. The slider is slidably inserted in the mounting blind hole and connected to the compression spring. The spherical head is fixed on the exposed end of the slider.

4. The ruler for measuring the sheave angle according to claim 1, characterized in that: Scale lines are arranged on the front wall surface of the adjustment plate.

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