Double-layer multi-roller self-balancing support node and mounting method

Abstract

The invention relates to a double-layer multi-roller self-balancing support node and an installation method, the self-balancing support node comprises a lower sliding part, a middle sliding part and an upper sliding part, the lower sliding part is provided with a lower roller assembly, the middle sliding part is provided with a middle roller assembly, and the upper sliding part is provided with an upper roller assembly; the bearing lower cable is arranged between the lower roller assembly and the middle roller assembly, and the bearing upper cable is arranged between the middle roller assembly and the upper roller assembly. The lower sliding piece, the middle sliding piece and the upper sliding piece are adopted to achieve adjustment of unbalanced force between adjacent spans of the photovoltaic flexible support through sliding of the upper bearing cable and the lower bearing cable, the whole middle support joint is reasonable in stress, cable bodies can be effectively prevented from being bent and abraded, and the whole middle support joint is convenient to stretch and draw through the lower bearing cable. The unbalanced force borne by adjacent spans of supports in the photovoltaic flexible support can be effectively adjusted, and the whole device is efficient and convenient to install and suitable for a double-layer cable photovoltaic flexible support structure.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic supports, and in particular to a double-layer multi-roller self-balancing support node and an installation method thereof. Background Art

[0002] In recent years, the installed capacity of photovoltaic power stations, which represent renewable energy, has grown rapidly. Photovoltaic flexible brackets are a new type of photovoltaic bracket. With their large span and high clearance, they have great advantages in special scenarios such as fish ponds, complex mountainous areas, and sewage treatment plants, and are widely favored by engineers.

[0003] The middle support of the flexible support supports the load-bearing cable through the middle support node. The load-bearing cable in the commonly used node form is in direct contact with the middle steel beam, which can easily cause wear on the load-bearing cable. There is also great friction between the two, making sliding difficult. In addition, due to the special requirements of many projects for pile points and the limitations of actual terrain, the actual engineering application of flexible supports often adopts unequal span schemes, resulting in large unbalanced forces on the middle support nodes. If this unbalanced force is transmitted to the middle support, it will bring the risk of cracking and overturning of the middle support foundation, posing a safety hazard. In order to eliminate the hidden dangers, the middle support usually needs to be reinforced during the design process, resulting in a significant increase in the cost of the middle support and a decrease in the economic efficiency of the entire flexible support project.

[0004] In order to solve the problem of load-bearing cables being easily worn at the middle support node, the patent "CN219918760U" proposes a roller-type node for sliding the suspension cable of the middle support. However, the contact area between the cable body and the middle support node of this patent solution is small, which can easily cause the cable body to bend and local stress concentration, and the installation process is relatively cumbersome; the patent "CN117780860A" proposes a load-bearing cable fixing structure and a load-bearing cable bracket to solve the problem of fixing load-bearing cables at different angles. The load-bearing cables are locked and fixed, and the unbalanced force on both sides of the middle support cannot be adjusted by sliding.

[0005] Existing solutions are only suitable for single-layer cable flexible support structures and cannot solve the unbalanced force problem faced by double-layer cable unequal span flexible support structures, which is not conducive to the promotion and application of photovoltaic flexible support in engineering. Therefore, how to improve the support node to ensure a smooth transition of the load-bearing cables at the node, and release and adjust the unbalanced forces on both sides of the support in unequal spans, so as to make it suitable for double-layer cable photovoltaic flexible support structures, is a key engineering and technical problem that needs to be solved urgently. Summary of the Invention

[0006] In order to solve the above problems, the present invention provides a double-layer multi-roller self-balancing support node and installation method, which reduces the bending of the load-bearing lower cable at the middle support node, reduces the friction between the load-bearing lower cable and the load-bearing upper cable and the middle support node, and facilitates the full-length tensioning of the load-bearing lower cable. At the same time, it can effectively adjust the unbalanced force exerted on adjacent spans of the support in the photovoltaic flexible bracket. The entire device is efficient and convenient to install and is suitable for double-layer cable photovoltaic flexible bracket structures.

[0007] The technical solution adopted by the present invention is: a double-layer multi-roller self-balancing support node, characterized in that: it includes a lower sliding member, a middle sliding member and an upper sliding member, the lower sliding member is fixed on the middle support steel beam, the middle sliding member is fixed on the lower sliding member, and the upper sliding member is fixed on the middle sliding member; the lower sliding member is provided with a lower roller assembly, the middle sliding member is provided with a middle roller assembly, and the upper pulley member is provided with an upper roller assembly; the load-bearing lower cable is arranged between the lower roller assembly and the middle roller assembly, and the load-bearing upper cable is arranged between the middle roller assembly and the upper roller assembly.

[0008] Preferably, the lower roller assembly includes at least three rolling pulleys arranged side by side along the traction direction of the load-bearing cable. The rolling pulleys have different heights and are symmetrically distributed along the middle axis. The middle rolling pulley has the highest height, and the rolling pulleys on both sides gradually decrease in height to reduce bending and cable wear.

[0009] Preferably, the middle roller assembly includes two groups of rolling pulleys arranged along the height direction, namely an upper rolling pulley group and a lower rolling pulley group. The upper rolling pulley group corresponds to the upper roller assembly, and the load-bearing upper cable is arranged between the upper rolling pulley group and the upper roller assembly; the lower rolling pulley group corresponds to the lower roller assembly, and the load-bearing lower cable is arranged between the lower rolling pulley group and the lower roller assembly.

[0010] Preferably, the upper rolling pulley assembly includes at least three rolling pulleys arranged side by side along the traction direction of the load-bearing cable, and the rolling pulleys are flush in height.

[0011] Preferably, the lower rolling pulley group includes at least three rolling pulleys arranged side by side along the traction direction of the load-bearing cable. The rolling pulleys have different heights and are symmetrically distributed along the middle axis. The middle rolling pulley has the highest height. In order to reduce the wear of the load-bearing lower cable during tensioning, the heights of the rolling pulleys on both sides gradually decrease.

[0012] Preferably, the upper roller assembly comprises at least three rolling pulleys arranged side by side along the traction direction of the load-bearing cable, and the rolling pulleys are flush in height.

[0013] Preferably, the middle sliding member uses a limiting rib to limit the lateral displacement of the load-bearing lower cable.

[0014] Preferably, if there is an unbalanced force on the upper load-bearing cables and the lower load-bearing cables on both sides of the middle support steel beam, it will drive the rolling pulley assemblies in the lower sliding member, the middle sliding member and the upper sliding member to slide, thereby releasing the unbalanced force and realizing the adjustment of the unbalanced force.

[0015] Preferably, the middle support steel beam can be made of I-beam, square steel or other shaped steel.

[0016] Preferably, the lower sliding member, the middle sliding member and the upper sliding member are all integrally cast components.

[0017] Preferably, the rolling pulleys are all saddle-shaped with an internal concave arc section, and are made of wear-resistant and elastic materials such as rubber.

[0018] Preferably, both ends of the lower sliding member are chamfered for rounding.

[0019] Preferably, the gaps between the rolling pulley assemblies of the lower sliding member, the middle sliding member and the upper sliding member can be adjusted by adjusting the diameter of the rolling pulleys or the heights of the support plates on both sides of the middle sliding member and the upper sliding member.

[0020] Preferably, the lower sliding member and the middle sliding member are mounted on the middle support steel beam by fastening bolts, and the upper sliding member is mounted on the middle sliding member by fastening bolts.

[0021] A method for installing the above-mentioned double-layer multi-roller self-balancing support node is characterized by comprising the following steps:

[0022] S1. Install the lower sliding part on the installed middle support steel beam by tightening the bolts;

[0023] S2. Place the load-bearing lower cable on the lower sliding member, and then install the middle sliding member to limit it;

[0024] S3. After placing the load-bearing upper cable on the middle sliding member, the upper sliding member is installed on the middle sliding member by tightening bolts to limit the load-bearing upper cable;

[0025] S4. Tension the upper load-bearing cable to the designed pre-tension;

[0026] S5. Tension the lower load-bearing cable to the designed pretension, thereby completing the installation of the middle support node.

[0027] The invention achieves the following beneficial effects: The lower, middle, and upper sliding members are used to adjust the unbalanced forces between adjacent spans of a photovoltaic flexible support through the sliding of the upper and lower load-bearing cables. This results in a rational force distribution throughout the middle support nodes, effectively preventing cable bending and wear. This facilitates full-length tensioning of the lower load-bearing cables while effectively adjusting the unbalanced forces between adjacent spans of the photovoltaic flexible support. The entire device is efficient and convenient to install, and is suitable for double-cable photovoltaic flexible support structures. This invention has promising engineering applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of a typical double-layer cable photovoltaic flexible support structure;

[0029] Figure 2 This is a schematic diagram of the node of a double-layer multi-roller self-balancing support;

[0030] Figure 3 Schematic diagram of the lower sliding member structure;

[0031] Figure 4 Schematic diagram of the structure of the middle sliding part;

[0032] Figure 5 Schematic diagram of the upper sliding member structure;

[0033] Figure 6 This is a schematic diagram of the installation of a double-layer multi-roller self-balancing support node;

[0034] In the figure: 1. Middle support steel beam; 2. Load-bearing upper cable; 3. Load-bearing lower cable; 4. Lower sliding member; 41. Lower roller assembly; 5. Middle sliding member; 51. Middle roller assembly; 511. Upper rolling pulley group; 512. Lower rolling pulley group; 6. Upper sliding member; 61. Upper roller assembly; 7. Fastening bolts; 9. Limiting ribs. DETAILED DESCRIPTION

[0035] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0036] like Figure 1-5 As shown, a double-layer multi-roller self-balancing support node of the present invention includes a lower sliding member 4, a middle sliding member 5 and an upper sliding member 6. The lower sliding member 4 is fixed to the middle support steel beam 1 by fastening bolts 7. The middle support steel beam 1 can be made of I-beam, square steel or other shaped steel; the middle sliding member 5 is fixed to the lower sliding member 4 by fastening bolts 7, and the upper sliding member 6 is fixed to the middle sliding member 5 by fastening bolts 7.

[0037] The lower slider 4 is provided with a lower roller assembly 42, the middle slider 5 is provided with a middle roller assembly 51, and the upper pulley 6 is provided with an upper roller assembly 61. The ends of the lower slider 4 are chamfered for smoothness. The load-bearing lower cable 3 is placed in the gap between the rolling pulley of the lower roller assembly 42 and the rolling pulley of the lower layer of the middle roller assembly 51 to limit its position, and a limiting rib 9 is used to limit the lateral displacement of the load-bearing lower cable 3. After the load-bearing lower cable 3 is placed on the lower slider 4, the middle slider 5 is installed on the lower slider 4 by tightening bolts 7. The load-bearing upper cable 2 is placed in the gap between the rolling pulley of the upper layer of the middle roller assembly 51 and the rolling pulley of the upper roller assembly 61 to limit its position. After the load-bearing upper cable 2 is placed on the middle slider 5, the upper slider 6 is installed on the middle slider 5 by tightening bolts 7.

[0038] In this embodiment, the lower roller assembly 41 includes at least three rolling pulleys arranged side by side along the traction direction of the load-bearing rope. The rolling pulleys have different heights and are symmetrically distributed along the middle axis. The middle rolling pulley has the highest height. In order to reduce bending and rope wear, the heights of the rolling pulleys on both sides gradually decrease.

[0039] In this embodiment, the middle roller assembly 51 includes two groups of rolling pulleys arranged along the height direction, namely an upper rolling pulley group 511 and a lower rolling pulley group 512. The upper rolling pulley group 511 corresponds to the upper roller assembly 61, and the load-bearing upper cable 2 is arranged between the upper rolling pulley group 511 and the upper roller assembly 61; the lower rolling pulley group 512 corresponds to the lower roller assembly 41, and the load-bearing lower cable 3 is arranged between the lower rolling pulley group 512 and the lower roller assembly 41.

[0040] In this embodiment, the upper rolling pulley group 511 includes at least three rolling pulleys arranged side by side along the traction direction of the load-bearing cable, and the rolling pulleys are at the same height; the lower rolling pulley group 512 includes at least three rolling pulleys arranged side by side along the traction direction of the load-bearing cable, and the rolling pulleys have different heights and are symmetrically distributed along the middle axis. The middle rolling pulley has the highest height, and the rolling pulleys on both sides are gradually reduced in height to reduce the wear of the load-bearing lower cable 3 during the full-length tensioning.

[0041] In this embodiment, the upper roller assembly 61 includes at least three rolling pulleys arranged side by side along the traction direction of the load-bearing cable, and the rolling pulleys are flush with each other.

[0042] The gap between the lower slider 4, the middle slider 5 and the upper slider 6 can be adjusted by adjusting the diameter of the rolling pulley on the roller assembly (upper roller assembly 61, middle roller assembly 51 and lower roller assembly 41) or the height of the support plates on both sides of the middle slider 5 and the upper slider 6. If there is an unbalanced force on the upper load-bearing cable 2 and the lower load-bearing cable 3 on both sides of the middle support steel beam 1, it will drive the rolling pulleys in the lower slider 4, the middle slider 5 and the upper slider 6 to slide, thereby releasing the unbalanced force. The adjustment of the unbalanced force between adjacent spans is achieved by sliding the upper load-bearing cable 2 and the lower load-bearing cable 3. The entire middle support node is reasonably stressed, which can effectively prevent the cable body from bending and wearing, and facilitates the full-length tensioning of the lower load-bearing cable 3. At the same time, it can effectively adjust the unbalanced force on the adjacent spans of the middle support of the photovoltaic flexible bracket. The entire device is efficient and convenient to install and is suitable for double-layer cable photovoltaic flexible bracket structures.

[0043] In this embodiment, the lower sliding member 4, the middle sliding member 5, and the upper sliding member 6 are all integrally cast components, and both ends of the lower sliding member 4 are chamfered for smoothness.

[0044] In this embodiment, the rolling pulleys all adopt a saddle-shaped inner concave arc section and are made of wear-resistant and elastic materials such as rubber.

[0045] A method for installing the above-mentioned double-layer multi-roller self-balancing support node is characterized by comprising the following steps:

[0046] S1. Install the lower sliding member 4 on the installed middle support steel beam 1 by tightening the bolts 7;

[0047] S2. Place the load-bearing lower cable 3 on the lower sliding member 4, and then install the middle sliding member 5 to limit it;

[0048] S3. After placing the load-bearing upper cable 2 on the middle sliding member 5, the upper sliding member 6 is installed on the middle sliding member 5 by tightening the bolts 7 to limit the load-bearing upper cable 2;

[0049] S4. Tension the upper load-bearing cable 2 to the designed pre-tension;

[0050] S5. Tension the lower load-bearing cables 3 to the designed pretension, and then complete the installation of the middle support node.

[0051] It should be noted that the description of the above technical solutions is illustrative only. This specification may be embodied in various forms and should not be construed as limiting the technical solutions set forth herein. Rather, these descriptions are provided to ensure that the disclosure of the present invention is thorough and complete and to fully convey the scope of the disclosure to those skilled in the art. Furthermore, the technical solutions of the present invention are limited only by the scope of the claims.

[0052] Finally, it should be noted that the above embodiments are merely representative examples of the present invention. Obviously, the present invention is not limited to the above embodiments and is susceptible to numerous variations. Any simple modifications, equivalent variations, and modifications to the above embodiments based on the technical essence of the present invention shall be deemed to fall within the scope of protection of the present invention.

Claims

1. A double-layer multi-roller self-balancing support node, characterized by: It includes a lower sliding member, a middle sliding member and an upper sliding member, the lower sliding member is fixed on the middle support steel beam, the middle sliding member is fixed on the lower sliding member, and the upper sliding member is fixed on the middle sliding member; the lower sliding member is provided with a lower roller assembly, the middle sliding member is provided with a middle roller assembly, and the upper pulley member is provided with an upper roller assembly; the load-bearing lower cable is arranged between the lower roller assembly and the middle roller assembly, and the load-bearing upper cable is arranged between the middle roller assembly and the upper roller assembly.

2. The double-layer multi-roller self-balancing support node according to claim 1, characterized in that: The lower roller assembly comprises at least three rolling pulleys arranged side by side along the traction direction of the load-bearing rope. The rolling pulleys have different heights and are symmetrically distributed along the middle axis. The middle rolling pulley is the highest, and the heights of the rolling pulleys on both sides gradually decrease.

3. The double-layer multi-roller self-balancing support node according to claim 1, characterized in that: The middle roller assembly includes two groups of rolling pulleys arranged along the height direction, namely an upper rolling pulley group and a lower rolling pulley group. The upper rolling pulley group corresponds to the upper roller assembly, and the load-bearing upper cable is arranged between the upper rolling pulley group and the upper roller assembly; the lower rolling pulley group corresponds to the lower roller assembly, and the load-bearing lower cable is arranged between the lower rolling pulley group and the lower roller assembly.

4. The double-layer multi-roller self-balancing support node according to claim 3, characterized in that: The upper rolling pulley group includes at least three rolling pulleys arranged side by side along the traction direction of the load-bearing cable. The rolling pulleys have different heights and are symmetrically distributed along the middle axis. The middle rolling pulley is the highest, and the heights of the rolling pulleys on both sides gradually decrease.

5. The double-layer multi-roller self-balancing support node and installation method according to claim 3, characterized in that: The lower rolling pulley group includes at least three rolling pulleys arranged side by side along the traction direction of the load-bearing cable. The rolling pulleys have different heights and are symmetrically distributed along the middle axis. The middle rolling pulley is the highest, and the heights of the rolling pulleys on both sides gradually decrease.

6. The double-layer multi-roller self-balancing support node according to claim 1, characterized in that: The upper roller assembly comprises at least three rolling pulleys arranged side by side along the traction direction of the load-bearing rope, and the rolling pulleys are flush in height.

7. The double-layer multi-roller self-balancing support node according to claim 1, characterized in that: The middle sliding member uses a limiting rib to limit the lateral displacement of the load-bearing lower cable.

8. The double-layer multi-roller self-balancing support node according to claim 1, characterized in that: If there is unbalanced force on the upper load-bearing cables and the lower load-bearing cables on both sides of the middle support steel beam, it will drive the rolling pulley assemblies in the lower sliding member, the middle sliding member and the upper sliding member to slide, thereby releasing the unbalanced force and realizing the adjustment of the unbalanced force.

9. A method for installing a double-layer multi-roller self-balancing support node according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. Install the lower sliding part on the installed middle support steel beam by tightening the bolts; S2. Place the load-bearing lower cable on the lower sliding member, and then install the middle sliding member to limit it; S3. After placing the load-bearing upper cable on the middle sliding member, the upper sliding member is installed on the middle sliding member by tightening bolts to limit the load-bearing upper cable; S4. Tension the upper load-bearing cable to the designed pre-tension; S5. Tension the lower load-bearing cable to the designed pretension, thereby completing the installation of the middle support node.

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