Device and method for automatically retracting rocker arm based on combined spring for rocker arm landing support rod

Abstract

The present invention belongs to the field of transmission line tower assembly and construction, and discloses a combination spring-based self-retracting device and method for preventing rocker arms from collapsing when the rocker arms are in a grounded state. The device comprises a loading module, a transmission module, and an installation module. The loading module comprises a support rod and a push rod; the transmission module comprises a push rod pressure plate and a combination spring; and the installation module comprises a support front plate, a support rear plate, and an inner spring guide rod. The support rod is fixedly connected to one end of a plurality of push rods, the other ends of which are fixed to the push rod pressure plate; a plurality of inner spring guide rods have one end fixed to the support front plate and the other end fixed to the support rear plate; and each spring guide rod is provided with a combination spring sleeved around the outer circumference of the portion between the push rod pressure plate and the support rear plate. The present invention has a simple structure and is easy to manufacture and install. It solves the problem of difficulty in self-locking and deploying the rocker arms of the grounded state, thereby improving the efficiency of tower assembly for double rocker arms in a grounded state.

Description

Technical Field

[0001] The invention belongs to the field of transmission line tower assembly construction, and particularly relates to a device and method for preventing a rocker arm from self-retracting when the rocker arm is grounded and the rocker arm is grounded. Background Art

[0002] Transmission line tower assembly is a critical step in power grid construction, characterized by large workloads, high construction difficulty, and numerous technical procedures. Compared to internally suspended booms, jib-type floor-mounted booms allow for simultaneous lifting on both sides, resulting in high construction efficiency. Furthermore, the boom columns are directly supported on the ground, providing excellent structural stability and safety. Therefore, jib-type floor-mounted booms are a commonly used and important piece of equipment for tower assembly.

[0003] The basic structure of the existing rocker arm landing bracket includes: luffing wire rope, mast, rocker arm and pole body, etc. The rocker arm achieves luffing through the movement of the luffing wire rope. When the pole body of the rocker arm landing bracket reaches a certain height, the length of the luffing wire rope increases, resulting in an increase in its own weight. When the angle between the rocker arm and the mast is small, the traction force of the luffing wire rope and the wind load on the rocker arm will cause the rocker arm to fold and self-lock. At present, the rocker arm bracket has not been installed with an anti-folding self-locking device, and the method of manual or winch dragging from below is generally adopted. It can be seen from the search that Zhang Weimin and others once designed a double rocker arm bracket rocker anti-overturning support device, but it did not achieve the expected effect.

[0004] Currently, manual or capstan-driven dragging poses safety risks and is prone to accidents. A dual-arm rocker arm anti-tilt support designed by Zhang Weimin et al., mounted on the top of the arm, suffers from a small spring extension and short travel, resulting in a weak spring force and difficulty in successfully releasing the rocker arm. Furthermore, the high friction of the push plate against the rocker arm can easily damage the main arm material. These shortcomings have prevented this device from being widely adopted.

[0005] Some manufacturers have carried out relevant device design work, but have not carried out detailed theoretical research, and the problem of self-locking of the rocker arm when it is retracted has not been effectively solved. Summary of the Invention

[0006] The purpose of the present invention is to provide a device and method for preventing the rocker arm from self-retracting when the rocker arm is grounded based on a combination spring, so as to solve the problem of self-retraction caused by the increase in the deadweight of the variable-length wire rope after the rocker arm grounded holding rod reaches a certain height.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0008] In a first aspect, the present invention provides a self-retracting device for a rocker arm grounded holding rod anti-rocker arm based on a combination spring, comprising: a loading module, a transmission module and an installation module;

[0009] The loading module includes: a support rod and a push rod;

[0010] The transmission module includes: a push rod pressure plate and a combination spring;

[0011] The mounting module comprises: a supporting front plate, a supporting rear plate and an inner spring guide rod;

[0012] The support rod is fixedly connected to one end of several push rods, and the other end of the push rod is fixed to the push rod pressure plate; one end of several inner spring guide rods is fixed to the support front plate, and the other end is fixed to the support rear plate; a combined spring is provided on the outer periphery of each spring guide rod located between the push rod pressure plate and the support rear plate.

[0013] A further improvement of the present invention is that: a plurality of bushings are fixedly mounted on the push rod pressure plate; and a plurality of inner spring guide rods pass through the corresponding bushings.

[0014] A further improvement of the present invention is that the combined spring comprises an inner spring sleeved on the outer periphery of the inner spring guide rod and an outer spring sleeved on the outer periphery of the inner spring.

[0015] A further improvement of the present invention is that the inner ring of the outer spring and the outer ring of the bushing are clearance fit, and the inner ring of the inner spring and the outer ring of the inner spring guide rod are transition fit.

[0016] A further improvement of the present invention is that an outer spring block is provided on the supporting rear plate.

[0017] A further improvement of the present invention is that the support rod includes a first steel tube;

[0018] Two connecting ear plates are fixed in the middle of the first steel pipe, and a rib plate is fixed between the connecting ear plate and the side wall of the first steel pipe; each connecting ear plate is provided with two mounting holes, and each rib plate is provided with a mounting hole, for a total of six mounting holes, for installing the corresponding six push rods.

[0019] A further improvement of the present invention is that: the push rod includes an ear plate, a second steel pipe and a joint; the ear plate is fixed to one end of the second steel pipe and forms an L shape together with the second steel pipe; the other end of the second steel pipe is a joint; the joint is fixed to the push rod pressure plate.

[0020] A further improvement of the present invention is that: a steel plate is fixed to both ends of the first steel pipe; a stop sleeve is installed on both sides of the first steel pipe, and a second short shaft sleeve, a long shaft sleeve and a first short shaft sleeve are installed in sequence between the stop sleeve and the corresponding steel plate.

[0021] A further improvement of the present invention is that one or both of the supporting front plate and the supporting rear plate are fixedly connected to the main material of the uppermost mast standard section in the rocker arm landing bracket, and the supporting rod protrudes from the outer wall of the uppermost mast standard section.

[0022] In the second aspect, the present invention provides a method for preventing the rocker arm from self-collapse when the rocker arm is on the ground based on a combination spring, comprising: after the rocker arm of the rocker arm is folded, it hits the support rod, driving the support rod and the push rod to press against the push rod pressure plate, so that the combination spring is compressed and the kinetic energy is stored as elastic potential energy, which reacts to the rocker arm, causing the rocker arm to rebound, thereby preventing the rocker arm from self-locking when folded.

[0023] Compared with the existing technology, this device has the following beneficial effects:

[0024] The present invention provides a self-retracting device and method for a rocker arm anti-sway arm using a combination spring. The device comprises a loading module, a transmission module, and an installation module. The loading module comprises a support rod and a push rod; the transmission module comprises a push rod pressure plate and a combination spring; and the installation module comprises a support front plate, a support rear plate, and an inner spring guide rod. The support rod is fixedly connected to one end of several push rods, the other ends of which are fixed to the push rod pressure plate; several inner spring guide rods have one end fixed to the support front plate and the other end fixed to the support rear plate; and each spring guide rod is sheathed with a combination spring around the outer circumference of the portion between the push rod pressure plate and the support rear plate. The present invention has a simple structure and is easy to manufacture and install.

[0025] The invention has a good energy storage effect. Within the operating range of the rocker arm's luffing angle of 70° to 87°, the device can directly open the rocker arm by compressing the combined spring to store energy, solving the problem of the ground-mounted rocker arm's self-locking when folded and the difficulty of extending it, thereby improving the efficiency of the double-rocker arm ground-mounted tower assembly construction.

[0026] The present invention can be reused after the holding pole is dismantled, the device is quick and convenient to install, the workload and labor intensity of construction workers are reduced, and resources and engineering costs are saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0028] Figure 1 It is a structural diagram of the anti-rocker arm self-retracting device;

[0029] Figure 2 Schematic diagram of the structure of the support rod;

[0030] Figure 3 Schematic diagram of the structure of the push rod;

[0031] Figure 4 It is the structural diagram of the combined spring;

[0032] Figure 5 Schematic diagram of the structure of the inner spring guide rod;

[0033] Figure 6 This is a structural diagram of the rocker arm landing arm.

[0034] Figure: 1, support rod; 2, push rod; 3, support front plate; 4, bushing; 5, push rod pressure plate; 6, inner spring; 7, inner spring guide rod; 8, outer spring; 9, support rear plate; 10, outer spring clamp; 101, luffing wire rope; 102, safety rope; 103, mast standard section; 104, lifting wire rope; 105, hook; 106, hanging piece; 107, inner pull wire; 108, reinforced anti-lock Twisting ring; 109, pole body; 110, turntable; 111, rocker arm; 112, mast; 11, steel plate; 12, first short shaft sleeve; 121, second short shaft sleeve; 13, long shaft sleeve; 14, stop sleeve; 15, connecting ear plate; 16, rib plate; 17, first steel pipe; 21, ear plate; 22, second steel pipe; 23, joint; 71, first screw hole plate; 72, third steel pipe; 73, second screw hole plate. DETAILED DESCRIPTION

[0035] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other.

[0036] The following detailed description is an exemplary description and is intended to provide further detailed description of the present invention. Unless otherwise indicated, all technical terms used in the present invention have the same meaning as those generally understood by those skilled in the art to which the present invention belongs. The terms used in the present invention are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention.

[0037] Example 1

[0038] See also Figure 1 As shown, the present invention provides a rocker arm grounding holding rod anti-rocker arm self-retraction device based on a combined spring, comprising: a loading module, a transmission module and an installation module.

[0039] The loading module includes a support rod 1 and a push rod 2;

[0040] The transmission module includes a bushing 4, a push rod pressure plate 5, an inner spring 6, an outer spring 8 and an outer spring block 10;

[0041] The mounting module comprises a supporting front plate 3 , an inner spring guide rod 7 and a supporting rear plate 9 .

[0042] The support rod 1 is fixedly connected to one end of the six push rods 2 through bolt connection, and the other ends of the six push rods 2 are fixed on the push rod pressure plate 5 to transmit force.

[0043] Six bushings 4 are fixedly mounted on the push rod pressure plate 5; six inner spring guide rods 7 are fixed at one end to the support front plate 3 and at the other end to the support rear plate 9; the six inner spring guide rods 7 pass through corresponding bushings 4. Each spring guide rod 7, located between the push rod pressure plate 5 and the support rear plate 9, is sheathed with a combination spring. This combination spring comprises an inner spring 6 sheathed around the outer circumference of the inner spring guide rod 7 and an outer spring 8 sheathed around the outer circumference of the inner spring 6. An outer spring retaining block 10 is provided on the support rear plate 9. The inner ring of the outer spring 8 has a clearance fit with the outer ring of the bushing 4, while the inner ring of the inner spring 6 has a transition fit with the outer ring of the inner spring guide rod 7. Furthermore, the outer spring retaining block 10 and the inner spring guide rod 7 act as limiters, preventing the spring from skewing during operation.

[0044] See also Figure 2 As shown, the support rod 1 includes a steel plate 11 , a first short shaft sleeve 12 , a second short shaft sleeve 121 , a long shaft sleeve 13 , a stop sleeve 14 , a connecting ear plate 15 , a rib plate 16 and a first steel tube 17 .

[0045] A steel plate 11 is fixed to each end of the first steel tube 17. A stopper 14 is installed on each side of the first steel tube 17. A second short shaft sleeve 121, a long shaft sleeve 13, and a first short shaft sleeve 12 are sequentially installed between the stopper sleeve 14 and the corresponding steel plate 11. Two connecting lugs 15 are fixed to the middle of the first steel tube 17. Ribs 16 are also fixed between the connecting lugs 15 and the sidewalls of the first steel tube 17. Each connecting lug 15 has two mounting holes, and each rib 16 has one mounting hole, for a total of six mounting holes for mounting the corresponding six push rods 2.

[0046] See also Figure 3 As shown, the push rod 2 includes an ear plate 21, a second steel pipe 22 and a joint 23. The ear plate 21 is fixed to one end of the second steel pipe 22 and forms an L shape with the second steel pipe 22. The other end of the second steel pipe 22 is a joint 23.

[0047] See also Figure 4 As shown, the inner spring 6 and the outer spring 8 form a combined spring.

[0048] See also Figure 5 As shown, the inner spring guide rod 7 includes a first screw hole plate 71, a third steel tube 72, and a second screw hole plate 73. The first screw hole plate 71 and the second screw hole plate 73 are respectively fixed to the ends of the third steel tube 72. The first screw hole plate 71 is used to be fixedly connected to the support front plate 3, and the second screw hole plate 73 is used to be fixedly connected to the support rear plate 9.

[0049] Example 2

[0050] See also Figure 6As shown, the rocker arm landing holding rod includes a variable length wire rope 101, a safety rope 102, a mast standard section 103, a lifting wire rope 104, a hook 105, a hanging piece 106, an inner pull wire 107, a reinforced anti-torsion waist ring 108, a pole body 109, a turntable 110, a rocker arm 111 and a mast 112.

[0051] The top of the shaft 109 is fixedly connected to the mast 112; the lower part of the shaft 109 is connected to a reinforced anti-torsion waist ring 108, which is connected to the top of the shaft 109 via an internal tension wire 107. A turntable 110 is provided between the shaft 109 and the mast 112; multiple rocker arms 111 are connected to the turntable 110. A hanging piece 106 is hung on the hook 105. A lifting wire rope 104 is provided on the hook 105; one end of the lifting wire rope 104 is fixed, and the other end is connected to the lifting winch (not shown) through the rocker arm 111. One end of the luffing wire rope 101 is fixed, and the luffing wire rope 101 passes through the outer end of the rocker arm 111, the top of the mast 112, and the inside of the mast 112 to connect to the luffing winch (not shown). The rocker arm 111 and the top of the mast 112 are connected by a safety rope 102.

[0052] By calculating the luffing wire rope and wind load, the optimal installation position of the anti-sway arm self-retracting device is selected as the mast standard section 103 at the top of the mast 112, wherein the supporting front plate 3 is fixedly connected to the main material on one side of the top mast standard section 103 by bolts, and the supporting rear plate 9 is fixedly connected to the main material on the other side of the top mast standard section 103 by bolts; so that the supporting rod 1 protrudes from the outer wall of the top mast standard section 103.

[0053] The present invention provides a method for preventing a rocker arm from self-retracting when it falls to the ground based on a combination spring, comprising: within a working range of 70° to 87° of the rocker arm 111 amplitude variation angle, the rocker arm 111 is retracted and impacts the support rod 1 located on the outer wall of the uppermost mast standard section 103, driving the support rod 1 and the push rod 2 to press against the push rod pressure plate 5, so that the combination spring composed of the inner spring 6 and the outer spring 8 is compressed, and the kinetic energy is stored as elastic potential energy, which reacts to the rocker arm 111 to make it rebound, thereby playing a role in preventing the rocker arm from self-locking when retracting, and protecting the rocker arm from overturning when it falls to the ground.

[0054] It is understood from common technical knowledge that the present invention may be implemented by other embodiments that do not depart from its spirit or essential features. Therefore, the embodiments disclosed above are, in all respects, merely illustrative and not exclusive. All modifications within the scope of the present invention or equivalent to the scope of the present invention are intended to be encompassed by the present invention.

Claims

1. The rocker arm grounding holding rod anti-rocker arm self-retraction device based on the combined spring is characterized by: include: Loading module, transmission module and installation module; The loading module comprises: a support rod (1) and a push rod (2); The transmission module comprises: a push rod pressure plate (5) and a combined spring; The mounting module comprises: a supporting front plate (3), a supporting rear plate (9) and an inner spring guide rod (7); The support rod (1) is fixedly connected to one end of a plurality of push rods (2), and the other end of the push rod (2) is fixed to the push rod pressure plate (5); one end of a plurality of inner spring guide rods (7) is fixed to the support front plate (3), and the other end is fixed to the support rear plate (9); a combined spring is provided on the outer periphery of each inner spring guide rod (7) located between the push rod pressure plate (5) and the support rear plate (9); A plurality of bushings (4) are fixedly mounted on the push rod pressure plate (5); a plurality of inner spring guide rods (7) pass through the corresponding bushings (4); The combined spring comprises an inner spring (6) sleeved on the outer periphery of an inner spring guide rod (7) and an outer spring (8) sleeved on the outer periphery of the inner spring (6); The inner ring of the outer spring (8) and the outer ring of the bushing (4) are clearance fit, and the inner ring of the inner spring (6) and the outer ring of the inner spring guide rod (7) are transition fit; An outer spring block (10) is provided on the supporting rear plate (9).

2. The rocker arm grounding holding rod anti-rocker arm self-retracting device based on a combination spring according to claim 1 is characterized in that: The support rod (1) includes a first steel tube (17); Two connecting ear plates (15) are fixed to the middle of the first steel tube (17), and a rib plate (16) is fixed between the connecting ear plate (15) and the side wall of the first steel tube (17); each connecting ear plate (15) is provided with two mounting holes, and each rib plate (16) is provided with a mounting hole, for a total of six mounting holes for mounting the corresponding six push rods (2).

3. The rocker arm grounding holding rod anti-rocker arm self-retraction device based on a combination spring according to claim 1 is characterized in that: The push rod (2) comprises an ear plate (21), a second steel pipe (22) and a joint (23); the ear plate (21) is fixed to one end of the second steel pipe (22) and forms an L-shape together with the second steel pipe (22); the other end of the second steel pipe (22) is a joint (23); the joint (23) is fixed to the push rod pressure plate (5).

4. The rocker arm grounding holding rod anti-rocker arm self-retracting device based on a combination spring according to claim 2 is characterized in that: A steel plate (11) is fixed to both ends of the first steel tube (17); a stopper sleeve (14) is installed on both sides of the first steel tube (17); a second short shaft sleeve (121), a long shaft sleeve (13) and a first short shaft sleeve (12) are installed in sequence between the stopper sleeve (14) and the corresponding steel plate (11).

5. The rocker arm grounding holding rod anti-rocker arm self-retracting device based on a combination spring according to claim 1 is characterized in that: One or both of the supporting front plate (3) and the supporting rear plate (9) are fixedly connected to the main material of the uppermost mast standard section (103) in the rocker arm landing bracket, and the supporting rod (1) protrudes from the outer wall of the uppermost mast standard section (103).

6. A self-retracting method for rocker arm when rocker arm is grounded based on a combination spring, characterized in that: A rocker arm grounding holding rod anti-rocker arm self-retracting device based on a combined spring according to any one of claims 1 to 5; comprising: The rocker arm (111) of the rocker arm landing holding rod is folded and hits the support rod (1), driving the support rod (1) and the push rod (2) to press against the push rod pressure plate (5), so that the combined spring is compressed and the kinetic energy is stored as elastic potential energy, which reacts to the rocker arm (111) and causes the rocker arm (111) to rebound, thereby playing the role of preventing the rocker arm from folding and self-locking.

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