A power distribution pay-off pulley with self-locking function and method

Abstract

The present invention provides a distribution wire-paying pulley and method with a self-locking function, comprising a mounting frame, a pulley mounted in the mounting frame, and a self-locking device on the mounting frame; the self-locking device comprises a limit plate and a swing plate, the swing plate is located below the limit plate, and the wire passes between the swing plate and the limit plate; when the wire sag is too large, the swing plate is positively deflected by a certain angle under the pressure of the wire, so that it cooperates with the limit plate to press the entrance end of the wire, thereby locking the wire and stopping wire pay-out; when the wire sag returns to a normal range, the swing plate is reversely deflected so that the wire is unlocked and wire pay-out is normal; the wire pay-out process can be made safer, and line contact and friction can be avoided, and left-right swinging due to excessive line sag can be avoided, which may cause the line to touch houses and trees. The upper end of the self-locking device can be adjusted up and down to meet the needs of wires with different diameters passing through.

Description

Technical Field

[0001] The present invention belongs to the technical field of power distribution equipment, and in particular relates to a power distribution pay-off pulley with a self-locking function and a method thereof. Background Art

[0002] Currently, during line installation, construction workers use payout pulleys to reduce friction between conductors and crossarms and increase controllability of the payout trajectory. However, in practice, due to the weight of the conductors and the uncontrollability of the payout pulleys, the conductors often experience significant sag during the payout process, naturally hanging downward. This inevitably leads to contact and friction with conductors and communication lines passing below, potentially causing breakage and resulting in safety hazards, unnecessary economic losses, and public opinion.

[0003] Existing pay-out pulleys cannot automatically adjust the sag during the pay-out process. Excessive sag can cause friction with the wires passing below. Furthermore, excessive sag can increase the left-right swing of the conductor during pay-out, making it more likely to contact surrounding structures, such as houses and trees, leading to unnecessary civil disputes.

[0004] Therefore, how to avoid excessive sag during the distribution line laying process and apply it conveniently, quickly and efficiently in line installation construction is a difficult problem that needs to be solved. Summary of the Invention

[0005] To address the aforementioned issues, the present invention has designed a power distribution pay-off pulley with a self-locking function. During the pay-off process, the invention can self-lock or unlock based on the sag of the conductor passing through the front end of the pay-off pulley, thereby reducing the hidden dangers caused by excessive sag.

[0006] According to some embodiments, the present invention adopts the following technical solutions:

[0007] In a first aspect, the present invention provides a power distribution pay-off pulley with a self-locking function, comprising a mounting frame, a pulley mounted in the mounting frame, and a self-locking device further provided on the mounting frame;

[0008] The self-locking device includes a limit plate and a swing plate, the swing plate is located below the limit plate, and the wire passes through between the swing plate and the limit plate;

[0009] When the conductor sag is too large, the swing plate is deflected forward by a certain angle due to the pressure of the conductor, so that it cooperates with the limit plate to press the entrance end of the conductor, thereby locking the conductor and stopping the wire payout; when the conductor sag returns to the normal range, the swing plate deflects in the opposite direction to unlock the conductor and pay out normally.

[0010] Furthermore, the mounting frame includes a base, on which are mounted two parallel vertical plates arranged at a set interval, ribs are arranged between the vertical plates and the base, and the base is fixed to the set plane by fasteners.

[0011] Furthermore, a pulley is installed between the two vertical plates via a rotating shaft, a swing shaft is provided below the pulley, and a swing plate is installed on the swing shaft.

[0012] Furthermore, the base is U-shaped, the U is placed horizontally, a vertical plate is installed on the left side of the U, and fastener mounting holes are set on the right side.

[0013] Furthermore, the swing plate includes a front end section and a rear end section, a swing shaft is installed between the front end section and the rear end section, and the front end section is longer than the rear end section.

[0014] Furthermore, the swing plate is a rectangular plate with arc-shaped protrusions at both ends, and the arc-shaped protrusions are used to fit the wires.

[0015] Furthermore, the swing shaft is mounted on the side of the vertical plate through fasteners.

[0016] Furthermore, the limit plate is mounted on the mounting frame by fastening screws and is located above the pulley. The end of the limit plate is provided with a limit protrusion, which cooperates with the arc-shaped protrusion of the swing plate to limit and lock the wire.

[0017] Furthermore, the limiting plate can be detachably installed, and the size of the opening can be controlled by adjusting the height of the limiting plate to adapt to different wires.

[0018] In a second aspect, the present invention provides a method for operating a power distribution pay-off pulley with a self-locking function, comprising:

[0019] When the conductor sag is too large, the swing plate is deflected in a certain angle by the pressure of the conductor, so that it cooperates with the limit plate to press the entrance end of the conductor, thereby tightening the conductor and stopping the pay-out;

[0020] When the conductor sag returns to the normal range, the swing plate deflects in the reverse direction so that the conductor is unlocked and the wire is paid out normally.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The present invention provides a pulley with a self-locking function, which includes a self-locking device. The self-locking device has a limit plate and a swing plate. The swing plate is located below the limit plate, and the wire passes between the swing plate and the limit plate. When the wire sag is too large, the swing plate is positively deflected by a certain angle under the pressure of the wire, so that it cooperates with the limit plate to press the entrance end of the wire, thereby locking the wire and stopping wire pay-out. When the wire sag returns to a normal range, the swing plate is reversely deflected to unlock the wire for normal wire pay-out, which can make the wire pay-out process safer, avoid line contact and friction, and prevent the line from swinging left and right due to excessive line sag, thereby avoiding touching houses and trees.

[0023] 2. The swing plate of the self-locking device adopted in the present invention includes a front end section and a rear end section, and a swing shaft is installed between the front end section and the rear end section. The front end section is longer than the rear end section. The torque is controlled by controlling the length of the front end section and the rear end section to achieve the tightening effect. The limit plate can be detachably installed, and the opening size can be controlled by adjusting the height of the limit plate to adapt to different wires, and provide limits at different heights. The self-locking and unlocking functions can be achieved through the size of the sag. The upper end of the self-locking device can be adjusted up and down to meet the passage of wires with different wire diameters.

[0024] Advantages of additional aspects of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention.

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0027] Figure 1 This is a structural diagram of a power distribution pay-off pulley with a self-locking function;

[0028] Figure 2 This is a working diagram of a power distribution pay-off pulley with a self-locking function;

[0029] Among them: 1. Vertical plate; 2. Limit plate; 3. Swing plate; 4. Pulley; 5. Base; 6. Wire; 7. Top plate. DETAILED DESCRIPTION

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0031] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present invention belongs.

[0032] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0033] Example 1:

[0034] like Figure 1 As shown, this embodiment provides a distribution wire-laying pulley with a self-locking function, including a mounting frame, a pulley installed in the mounting frame, and a self-locking device on the mounting frame. The self-locking device includes a limit plate and a swing plate. The swing plate is located below the limit plate, and the wire passes between the swing plate and the limit plate. When the wire sag is too large, the swing plate is deflected in the positive direction by a certain angle due to the pressure of the wire, so that it cooperates with the limit plate to press the entrance end of the wire, thereby tightening the wire. When the wire sag returns to the normal range, the swing plate deflects in the opposite direction so that the wire can be laid out normally.

[0035] In one embodiment, the mounting frame includes a base, on which are mounted two parallel vertical plates arranged at a set distance, a rib plate disposed between the vertical plates and the base, and the base is fixed to a set plane by fasteners. A pulley is mounted between the two vertical plates via a rotating shaft, and a swing shaft is disposed below the pulley. A swing plate is mounted on the swing shaft. The swing plate is a rectangular plate with arc-shaped protrusions at both ends. The arc-shaped protrusions are used to fit the wire. When the front end of the wire sags too much, the front end of the swing plate will drop, and the rear end of the swing plate will rise. The rear end of the swing plate will fit the wire and then contact the limit plate to lock the wire. As a result, the sag of the wire front end is reduced after being pulled, and the swing plate returns to normal, and the rear end of the wire drops, allowing normal wire payout.

[0036] A top plate is provided on the top of the two vertical plates, which is rotatably mounted on the vertical plates by a spring. The top plate can be opened manually to insert the wire and can be reset under the action of the spring. The cross section of the top plate can be rectangular, triangular or other polygonal.

[0037] As an embodiment, the base is U-shaped, the U-shape is placed horizontally, a vertical plate is installed on the left side of the U-shape, and fastener mounting holes are set on the right side.

[0038] As an embodiment, the swing plate includes a front end section and a rear end section, a swing shaft is installed between the front end section and the rear end section, the front end section is longer than the rear end section, and the torque is controlled by controlling the length of the front end section and the rear end section to achieve the tightening effect, the end of the front end section has an arc-shaped protrusion, and the end of the rear end section also has an arc-shaped protrusion. Figure 2 As shown in , the left side of the swing plate is the front end section, and the right side is the rear end section; the left end of the wire is the front end of the wire, and the right end of the wire is the rear end of the wire.

[0039] As an embodiment, the swing shaft is mounted on the side of the vertical plate through fasteners.

[0040] In one embodiment, the limit plate is mounted on the mounting frame via a set screw. Adjusting the screw's position adjusts the limit plate's mounting height. The limit plate is positioned above the pulley, and a stopper protrusion is provided at its end. This, in conjunction with the curved protrusion on the swing plate, allows the wire to be locked in place. The limit plate is detachable, and the height of the stopper can be adjusted to control the size of the opening, accommodating different wires and providing different stopper heights.

[0041] This invention incorporates a self-locking mechanism that adjusts the sag of the conductor. Specifically, the upper and rear ends of the self-locking mechanism are fixed, but can be adjusted up and down by adjusting a set screw to accommodate conductors of varying diameters. The lower end of the self-locking mechanism is fixed by a rotating shaft, while the front and rear portions can float up and down. It is important to note that the length of the lower front end of the self-locking mechanism is greater than the length of the lower rear end. This design aims to increase torque by controlling the length of the connecting rod, thereby achieving wire tension. When the sag of the conductor increases, the force on the lower front end of the self-locking mechanism increases, causing the lower front end to press downward. This, driven by the rotating shaft, causes the lower rear end of the self-locking mechanism to rise. Consequently, the rear end of the self-locking mechanism compresses and locks the conductor. As the conductor continues to stretch, the sag decreases, and the force on the lower front end of the self-locking mechanism gradually decreases. The lower front end of the self-locking mechanism rises, and the rotating shaft drives the lower rear end of the self-locking mechanism downward, gradually releasing the conductor and allowing the payout process to continue.

[0042] Example 2:

[0043] This embodiment provides a method for operating a power distribution pay-off pulley with a self-locking function, comprising:

[0044] When the conductor sag is too large, the swing plate is deflected in a certain angle by the pressure of the conductor, so that it cooperates with the limit plate to press the entrance end of the conductor, thereby tightening the conductor and stopping the pay-out;

[0045] When the conductor sag returns to the normal range, the swing plate deflects in the opposite direction so that the conductor can be paid out normally.

[0046] The present invention designs a power distribution pay-off pulley with a self-locking function, which can self-lock or self-unlock during the pay-off process according to the sag of the wire passing through the front end of the pay-off pulley, thereby reducing the hidden dangers caused by excessive sag.

[0047] Although the above describes the specific embodiments of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without any creative work are still within the scope of protection of the present invention.

Claims

1. A power distribution pay-off pulley with a self-locking function, characterized in that: It includes a mounting frame, a pulley is installed in the mounting frame, and a self-locking device is also provided on the mounting frame; The self-locking device includes a limit plate and a swing plate, the swing plate is located below the limit plate, and the wire passes through between the swing plate and the limit plate; The mounting frame includes a base, on which are mounted two parallel vertical plates arranged at a set distance, a rib plate being provided between the vertical plates and the base, and the base being fixed to a set plane by fasteners; a pulley is mounted between the two vertical plates via a rotating shaft, a swing shaft is provided below the pulley, and a swing plate is mounted on the swing shaft; When the conductor sag is too large, the swing plate is deflected forward by a certain angle due to the pressure of the conductor, so that it cooperates with the limit plate to press the entrance end of the conductor, thereby locking the conductor and stopping the wire payout; when the conductor sag returns to the normal range, the swing plate deflects in the opposite direction to unlock the conductor and pay out normally.

2. The power distribution pay-off pulley with self-locking function according to claim 1, characterized in that: The base is U-shaped, the U-shape is placed horizontally, the vertical plate is installed on the left side of the U-shape, and the fastener installation holes are arranged on the right side.

3. The power distribution pay-off pulley with self-locking function according to claim 1, characterized in that: The swing plate includes a front end section and a rear end section, a swing shaft is installed between the front end section and the rear end section, and the front end section is longer than the rear end section.

4. The power distribution pay-off pulley with self-locking function according to claim 1, characterized in that: The swing plate is a rectangular plate with arc-shaped protrusions at both ends, and the arc-shaped protrusions are used to fit the wires.

5. The power distribution pay-off pulley with self-locking function according to claim 1, characterized in that: The swing shaft is mounted on the side of the vertical plate through fasteners.

6. The power distribution pay-off pulley with self-locking function according to claim 1, characterized in that: The limit plate is mounted on the mounting frame by fastening screws and is located above the pulley. The end of the limit plate is provided with a limit protrusion, which cooperates with the arc-shaped protrusion of the swing plate to limit and lock the wire.

7. The power distribution pay-off pulley with self-locking function according to claim 1, characterized in that: The limiting plate can be detachably installed, and the size of the opening can be controlled by adjusting the height of the limiting plate to adapt to different wires.

8. A method for operating a power distribution pay-off pulley with a self-locking function according to any one of claims 1 to 7, characterized in that: include: When the conductor sag is too large, the swing plate is deflected in a certain angle by the pressure of the conductor, so that it cooperates with the limit plate to press the entrance end of the conductor, thereby tightening the conductor and stopping the pay-out; When the conductor sag returns to the normal range, the swing plate deflects in the reverse direction so that the conductor is unlocked and the wire is paid out normally.

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