Swing mechanism limiting device

Abstract

The utility model discloses a slewing mechanism limiting device which comprises a left limiting buffer, a right limiting buffer, a left slewing limiting switch collision frame, a right slewing limiting switch collision frame, a left slewing limiting switch, a right slewing limiting switch and a buffer collision frame. The left limiting buffer, the right limiting buffer, the left rotation limiting switch collision frame and the right rotation limiting switch collision frame are all installed at the bottom of the rotation platform, and the buffer collision frame, the left rotation limiting switch and the right rotation limiting switch are all installed on the portal overhanging beam. The slewing mechanism limiting device provided by the utility model can realize mechanical and electrical dual slewing limiting, avoids collision between a slewing crane and a portal frame, and is safe, reliable and convenient to use and maintain.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydroelectric power station revolving cranes, and particularly relates to a revolving mechanism limit device. Background Technique

[0002] In hydroelectric power station lifting equipment, revolving cranes are often used. As an important component of the revolving crane, the safety of the revolving mechanism becomes particularly important. The revolving crane installed on the gantry crane usually has a working angle of 0° to 180°, and can rotate clockwise or counterclockwise. The stroke limit device, as a protection measure for the revolving mechanism, has been widely used. By controlling the angles of the revolving mechanism rotating clockwise and counterclockwise, the collision between the revolving crane and the gantry crane can be prevented.

[0003] Due to different types of revolving mechanisms, different revolving platform heights and shapes, there are various revolving limit devices. A common one is to control through an angle encoder installed in the revolving motor or revolving reducer, and the other is to limit through installing limit switches. The former method has a high manufacturing cost, and the latter method is prone to limit failure in the case of power failure and misoperation. Content of the Utility Model

[0004] The purpose of the utility model is to provide a revolving mechanism limit device aiming at the deficiencies of the prior art, which has low manufacturing cost, can realize double mechanical and electrical revolving limits, is safe and reliable, and is convenient for use and maintenance.

[0005] The technical solution adopted by the utility model is a revolving mechanism limit device, which includes a left limit buffer, a right limit buffer, a left revolving limit switch striker, a right revolving limit switch striker, a left revolving limit switch, a right revolving limit switch and a buffer striker. The left limit buffer, the right limit buffer, the left revolving limit switch striker and the right revolving limit switch striker are all installed at the bottom of the revolving platform, and the buffer striker, the left revolving limit switch and the right revolving limit switch are all installed on the outrigger beam of the gantry.

[0006] Further, the included angle between the buffer end faces of the left limit buffer and the right limit buffer and the longitudinal center line L1 of the revolving platform is α. The buffer striker is installed on the transverse center line L2 of the revolving platform and is on the same circumference as the left limit buffer and the right limit buffer. The included angle between the collision end faces on both sides of the buffer striker is 2α. The included angle between the left revolving limit switch and the right revolving limit switch and the longitudinal center line L1 of the revolving platform is β. The included angle between the left revolving limit switch striker and the right revolving limit switch striker and the transverse center line L2 of the revolving platform is β. The longitudinal center line L1 and the transverse center line L2 of the revolving platform are perpendicular to each other, and the left revolving limit switch, the right revolving limit switch, the left revolving limit switch striker and the right revolving limit switch striker are on the same circumference.

[0007] Further, two buffer supports are symmetrically installed at the bottom of the slewing platform, and the left limit buffer and the right limit buffer are respectively and fixedly installed on the two buffer supports through bolts.

[0008] Further, two travel limit switch supports are symmetrically and fixedly installed on the outer extension beam of the gantry, and the left slewing limit switch and the right slewing limit switch are respectively fixedly installed on the two travel limit switch supports.

[0009] Further, the value range of α is from 5° to 10°, and the value range of β is from 20° to 25°.

[0010] The beneficial effects of the present utility model are as follows:

[0011] The slewing mechanism limit device provided by the present utility model has low manufacturing cost, can achieve double mechanical and electrical slewing limits, avoids the collision between the slewing crane and the gantry, is safe and reliable, and is convenient for use and maintenance. Description of the Drawings

[0012] Figure 1 is the front view schematic diagram of the slewing mechanism limit device of the present utility model;

[0013] Figure 2 is the side view schematic diagram of the slewing mechanism limit device of the present utility model;

[0014] Figure 3 is another installation method of the slewing mechanism limit device of the present utility model;

[0015] Markings in the figure: 1. Outer extension beam of the gantry; 2. Slewing platform; 3. Buffer collision frame; 4. Buffer support; 5. Travel limit switch support; 6. Left slewing limit switch; 7. Left limit buffer; 8. Left slewing limit switch collision frame; 9. Right slewing limit switch; 10. Right limit buffer; 11. Right slewing limit switch collision frame. Specific Embodiments

[0016] In order to make the purpose, technical solutions and advantages of the present utility model clearer and more understandable, the technical solutions of the present utility model will be further described in detail below with reference to the accompanying drawings in the embodiments of the present utility model.

[0017] Refer to Figures 1 to 2, a limit device for a slewing mechanism of the present utility model includes a left limit buffer 7, a right limit buffer 10, a left slewing limit switch striker 8, a right slewing limit switch striker 11, a left slewing limit switch 6, a right slewing limit switch 9, and a buffer striker 3. The left limit buffer 7, the right limit buffer 10, the left slewing limit switch striker 8, and the right slewing limit switch striker 11 are all installed at the bottom of the slewing platform 2, and the buffer striker 3, the left slewing limit switch 6, and the right slewing limit switch 9 are all installed on the outrigger beam 1 of the gantry.

[0018] The included angle between the buffer end faces of the left limit buffer 7 and the right limit buffer 10 and the longitudinal center line L1 of the slewing platform 2 is α. The buffer striker 3 is installed on the transverse center line L2 of the slewing platform 2 and is on the same circumference as the left limit buffer 7 and the right limit buffer 10. The included angle between the collision end faces on both sides of the buffer striker 3 is 2α. The included angles between the left slewing limit switch 6 and the right slewing limit switch 9 and the longitudinal center line L1 of the slewing platform 2 are β. The included angles between the left slewing limit switch striker 8 and the right slewing limit switch striker 11 and the transverse center line L2 of the slewing platform 2 are β. The longitudinal center line L1 and the transverse center line L2 of the slewing platform 2 are perpendicular to each other. The left slewing limit switch 6, the right slewing limit switch 9, the left slewing limit switch striker 8, and the right slewing limit switch striker 11 are on the same circumference. Among them, the value range of α is 5° to 10°, and the value range of β is 20° to 25°.

[0019] Two buffer supports 4 are symmetrically installed at the bottom of the slewing platform 2. The left limit buffer 7 and the right limit buffer 10 are respectively fixedly installed on the two buffer supports 4 by bolts. Two travel limit switch supports 5 are symmetrically and fixedly installed on the outrigger beam 1 of the gantry. The left slewing limit switch 6 and the right slewing limit switch 9 are respectively fixedly installed on the two travel limit switch 5 supports.

[0020] The center of the limit buffer and the center of the buffer striker are on the same horizontal line, and the center of the limit buffer and the center of the buffer striker must be higher than the top of the slewing limit switch.

[0021] When the slewing platform 2 rotates, it can drive the left limit buffer 7, the right limit buffer 10, the left slewing limit switch striker 8, and the right slewing limit switch striker 11 to rotate synchronously.

[0022] The working principle of the present utility model is as follows:

[0023] The working angle of the slewing crane in the hydropower station is usually 0° to 180°. When the slewing crane is in the locked state, i.e., not working, the angle is 0°. At this time, the left limit buffer 7 is close to the buffer striker 3. When the slewing mechanism starts, the slewing platform 2 drives the buffer support 4 welded to the bottom, the left slewing limit switch striker 8 and the right slewing limit switch striker 11 to rotate together. The buffer support 4 is fixed to the left limit buffer 7 and the right limit buffer 8 respectively by bolts. Therefore, the left limit buffer 7 and the right limit buffer 8 will also rotate accordingly. When the slewing mechanism rotates 180° clockwise as shown in Figure 2 , the right slewing limit switch striker 11 touches the right slewing limit switch 9 to trigger the contact, and the right limit buffer 10 touches the buffer striker 3 at this time, and the slewing mechanism stops moving.

[0024] It should be noted that as shown in Figure 3 , the installation positions of the buffer striker 3, the left limit buffer 7, and the right limit buffer 10 are on the same circumference, and the installation positions of the right slewing limit switch striker 11, the right slewing limit switch 9, the left slewing limit switch striker 8, and the left slewing limit switch 6 are on the same circumference, and the installation positions of the buffer striker 3 and the right slewing limit switch 9 may not be on the same circumference.

[0025] The slewing mechanism limit device provided by the present utility model can achieve double mechanical and electrical slewing limits, avoid the collision between the slewing crane and the gantry, is safe and reliable, and is convenient for use and maintenance.

[0026] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art. It should also be noted that in this specification, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, the element defined by the statement "comprising one..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

Claims

1. A limiting device for a slewing mechanism, characterized in that, It includes a left limit buffer, a right limit buffer, a left slewing limit switch striker, a right slewing limit switch striker, a left slewing limit switch, a right slewing limit switch and a buffer striker. The left limit buffer, the right limit buffer, the left slewing limit switch striker and the right slewing limit switch striker are all installed at the bottom of the slewing platform, and the buffer striker, the left slewing limit switch and the right slewing limit switch are all installed on the outrigger beam of the gantry.

2. The swing mechanism limit device according to claim 1, characterized in that, The included angle between the buffer end faces of the left limit buffer and the right limit buffer and the longitudinal center line L1 of the slewing platform is α. The buffer striker is installed on the transverse center line L2 of the slewing platform and is on the same circumference as the left limit buffer and the right limit buffer. The included angle between the collision end faces on both sides of the buffer striker is 2α. The included angle between the left slewing limit switch and the right slewing limit switch and the longitudinal center line L1 of the slewing platform is β. The included angle between the left slewing limit switch striker and the right slewing limit switch striker and the transverse center line L2 of the slewing platform is β. The longitudinal center line L1 and the transverse center line L2 of the slewing platform are perpendicular to each other. The left slewing limit switch, the right slewing limit switch, the left slewing limit switch striker and the right slewing limit switch striker are on the same circumference.

3. The rotational mechanism limit device according to claim 2, wherein Two buffer supports are symmetrically installed at the bottom of the slewing platform, and the left limit buffer and the right limit buffer are respectively fixedly installed on the two buffer supports through bolts.

4. The rotational mechanism limiting device according to claim 2, characterized in that, Two travel limit switch supports are symmetrically and fixedly installed on the outrigger beam of the gantry, and the left slewing limit switch and the right slewing limit switch are respectively fixedly installed on the two travel limit switch supports.

5. The rotational mechanism limiting device according to claim 2, characterized in that, The value range of α is from 5° to 10°, and the value range of β is from 20° to 25°.

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