Node connecting structure for heat collector space frame structure

Abstract

The utility model discloses a node connecting structure for a space frame structure of a heat collector, a node and a connecting end of a branch pipe are mutually embedded and installed, the node connecting structure further comprises a plurality of inner supporting columns, the inner supporting columns are supported in the connecting end of the branch pipe, and the connecting end of the branch pipe and the node is fixedly connected with two ends of the inner supporting columns. The utility model not only can improve the strength of the supporting structure at the joint, but also has high manufacturing precision and low cost, and is beneficial to realizing mechanical and automatic production.

Description

Technical Field

[0001] The utility model belongs to the technical field of solar thermal power generation, in particular to a node connection structure for a collector space frame structure. Background Art

[0002] Parabolic trough solar thermal power generation systems convert solar radiation into heat through focusing collectors. The structural design of the collector is crucial, affecting not only its strength, rigidity, and assembly precision, which in turn influences the focusing effect of the reflectors and the efficiency of solar-to-heat conversion, but also the production, manufacturing, assembly, and transportation costs, as well as the efficiency of production and assembly. Currently, manufacturing costs and efficiency are the main factors limiting the application of CSP technology.

[0003] Although space grid trough collectors have attracted attention in the industry due to their advantages such as light weight, easy mechanized production and reduced transportation costs, the node connection technology has not been effectively improved, resulting in insufficient structural rigidity and strength, which in turn affects the optical performance and photothermal conversion efficiency. Therefore, they have not yet been widely used in the field of trough solar collectors.

[0004] Traditional node connection methods include welding and riveting, but there are two problems:

[0005] 1. Welding efficiency is low and cost is high; 2. The riveted structure is prone to local deformation and even compression deformation of the support tube. Summary of the Invention

[0006] In response to the existing node connection technology problems, the utility model proposes a node connection structure for the collector space frame structure, which not only improves the supporting structure strength of the node connection, but also has high manufacturing precision and low cost, which is conducive to the realization of mechanized and automated production.

[0007] The above technical objectives of the present invention are achieved through the following technical solutions:

[0008] A node connection structure for a collector space frame structure, in which the connecting ends of the node and the branch pipe are interlocked and installed. It is characterized in that it also includes a plurality of internal support columns, and the internal support columns are supported in the connecting ends of the branch pipes, and the connecting ends of the branch pipes and the nodes are fixedly connected to the two ends of the internal support columns.

[0009] Preferably, the connecting end of the branch pipe is a hexagonal structure, and each surface of the connecting end of the branch pipe is processed with a connecting hole I for fitting with the inner support column.

[0010] Preferably, a connection hole II corresponding one-to-one to the connection hole I is provided on the connection end of the node.

[0011] Preferably, the diameter of the mounting end of the inner support column is larger than the diameter of the middle section of the inner support column.

[0012] Preferably, the connection hole I is processed by hot melt drilling technology, so that flanges are formed on the inner wall surface around the connection hole I for positioning the inner support column.

[0013] Preferably, the mounting end of the inner support column is provided with a countersunk hole for accommodating the flange.

[0014] Preferably, there are three inner support columns, and the three inner support columns do not interfere with each other.

[0015] Beneficial effects: The utility model discloses a node connection structure for a collector space frame structure, which has the following advantages:

[0016] (1) The utility model adopts an internal support column to support the connection between the node and the branch pipe, which can meet the strength and rigidity requirements of the bolt or rivet connection structure, achieve reliable connection, and facilitate mechanized and automated production.

[0017] (2) The utility model adopts hot melt drilling technology for drilling, so that the connection hole I is turned inward. The turning edge can be used to accurately position the inner support column to achieve riveting fixation, which is beneficial to improving manufacturing accuracy and accelerating assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of the connection between the circular tube and the node in Example 1;

[0019] Figure 2 for Figure 1 Schematic diagram of the middle AA section;

[0020] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0021] Figure 4 This is a structural diagram of the inner support column of Example 1;

[0022] Figure 5 This is a schematic diagram of hot melt drilling in Example 1;

[0023] Figure 6 This is a schematic diagram of the flanging riveting positioning of Example 1.

[0024] In the figure: branch pipe 1, connecting hole I1-1, inner support column 2, mounting end 2-1, middle section 2-2, countersunk hole 2-3, node 3, rivet 4, hot melt drill bit 5. DETAILED DESCRIPTION

[0025] To make the purpose, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and examples. The examples only illustrate the support tube structure and the flow drill riveting process. However, it should be understood that the specific examples described herein are merely illustrative of the present invention and are not intended to limit the present invention. Example

[0026] A node connection structure for a collector space frame structure, such as Figure 1-3 As shown, the node 3 and the connecting end of the branch pipe 1 are interlocked and installed, and a plurality of internal support columns 2 are included. The internal support columns 2 are supported within the connecting end of the branch pipe 1, and the connecting end of the branch pipe 1 and the node 3 are fixedly connected to both ends of the internal support columns 2. In the present invention, the fixed connection method can be rivets 4 or bolts. The function of the internal support columns 2 is to withstand the clamping force of the riveted or bolted connection and prevent the connecting end of the branch pipe 1 from deforming, thereby achieving a reliable connection and sufficient friction.

[0027] like Figure 5 As shown, the connecting end of branch pipe 1 is a hexagonal structure, and each surface of the connecting end of branch pipe 1 is machined with a connecting hole I1-1 for mounting with inner support column 2. The connecting end of node 3 is provided with a connecting hole II corresponding to the connecting hole I1-1.

[0028] In this embodiment 1, the connection hole Ⅰ1-1 is processed by hot melt drilling technology, so that the connection hole Ⅰ1-1 is surrounded by flanges 1-2 on the inner wall surface for positioning the inner support column 2.

[0029] like Figure 4 As shown, the diameter of the mounting end 2-1 of the inner support column 2 is larger than the diameter of the middle section 2-2 of the inner support column 2. This increases the contact area between the inner support column 2 and the branch pipe 1, meeting the requirements of riveting or bolting. It also prevents interference between the three support pipes 2, reduces the hole spacing, and reduces the length of the branch pipe 1 connection end (formed hexagon).

[0030] In addition, in this embodiment, the mounting end 2-1 of the inner support column 2 is provided with a countersunk hole 2-3. This serves to accommodate the flanging metal, providing a riveting and positioning function for the inner support column 2. It also prevents the flanging metal from entering the gap between the end of the inner support column 2 and the connecting end surface of the branch pipe 1, thereby affecting the performance of the riveted or bolted connection.

[0031] In this embodiment 1, there are three inner support columns 2, and the three inner support columns 2 do not interfere with each other.

[0032] The specific connection method of the utility model is as follows:

[0033] like Figure 5As shown, a hot melt drill bit 5 is used instead of an ordinary drill bit to punch the connection end of the branch pipe 1. The friction heat generated by the hot melt drill bit 5 during rotation and feeding heats and softens the metal punching position of the connection end of the branch pipe 1, thereby forming a connection hole Ⅰ1-1 and a flange 1-2. The flange 1-2 is used to position and fix the inner support column 2. Figure 6 As shown, rivets 4 are then used to pass through the connection holes II and I1-1 in sequence and riveted together with the countersunk holes 2-3 of the inner support column 2.

[0034] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A node connection structure for a collector space frame structure, wherein the node and the connecting end of the branch pipe are interlocked and installed, characterized in that: It also includes a plurality of inner support columns, and the inner support columns are supported in the connecting ends of the branch pipes, and the connecting ends of the branch pipes and the nodes are fixedly connected to the two ends of the inner support columns.

2. The node connection structure for the collector space frame structure according to claim 1, characterized in that: The connecting end of the branch pipe is a hexagonal structure, and each surface of the connecting end of the branch pipe is processed with a connecting hole I for mounting in cooperation with the inner support column.

3. The node connection structure for the collector space frame structure according to claim 2, characterized in that: The connection end of the node is provided with a connection hole II corresponding to the connection hole I one by one.

4. The node connection structure for the collector space frame structure according to claim 2, characterized in that: The diameter of the mounting end of the inner support column is larger than the diameter of the middle section of the inner support column.

5. The node connection structure for the collector space frame structure according to claim 2, characterized in that: The connection hole I is processed by hot melt drilling technology, so that a flange is formed on the inner wall surface around the connection hole I for positioning the inner support column.

6. The node connection structure for the collector space frame structure according to claim 5, characterized in that: The mounting end of the inner support column is provided with a countersunk hole for accommodating the flange.

7. The node connection structure for a collector space frame structure according to claim 1, characterized in that: There are three inner support columns, and the three inner support columns do not interfere with each other.

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