Low-temperature-resistant GD hanging point fitting
By using alloy structural steel 35CrMo material and specific hanging plate structure, the problem of cold neck fracture in low-temperature areas of existing GD hanging point tools is solved, high stability and safety in low-temperature environments are achieved, and the material is significantly improved Low temperature resistance.
Patent Information
- Application Number
- CN202323641853.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-29
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2033-12-29
AI Technical Summary
The existing GD hanging point metal tools are prone to cold neck fractures in low temperature areas, resulting in unstable quality and pose safety hazards to the operation of ultra-high voltage transmission lines.
The alloy structural steel 35CrMo material is used for forging and processing, and a hanging plate structure with horizontal bolt columns, fastening nuts and closed pins is designed, and it provides a high fatigue limit and elongation under low temperature conditions to enhance the low temperature resistance of the material.
It effectively prevents mass failure in low-temperature areas, significantly improves the low-temperature performance of the material, and ensures the stability and safety of the product in an environment of -35℃.
Smart Images
Figure CN222191800U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of power transmission, in particular to a low-temperature resistant GD hanging point hardware. Background Art
[0002] In the tension towers of domestic UHV transmission line projects, the first fitting that connects the tower to the string-type fittings is mostly GD hanging fittings. Since the GD hanging fittings and the tower are constructed simultaneously, the GD hanging fittings cannot be disassembled after construction, so the quality requirements for the GD hanging fittings are high.
[0003] Most of the materials of domestic GD hanging point fittings are made of 35 steel or 40Cr steel forging. Although these two types of steel have high strength, during the forging process, due to the product structure and forging fluidity, it is easy to cause material segregation and coarse grains inside the product, which makes the material toughness decrease. It can meet the requirements when used in areas with normal temperatures, but in high-altitude and cold areas, especially in areas with long-term freezing and low temperature climates, the quality of these two materials is unstable, which can easily cause the product to have cold brittle fracture, resulting in quality accidents and causing great safety hazards to line operation. Utility Model Content
[0004] The technical problem to be solved by the utility model is to provide a low-temperature resistant GD hanging point hardware in view of the deficiencies of the prior art.
[0005] The technical problem solved by the present invention can be achieved by adopting the following technical solutions:
[0006] A low temperature resistant GD hanging point hardware, comprising:
[0007] A hanging plate, wherein left and right bolt columns extending horizontally outward are formed on the left and right sides of the upper part of the hanging plate, and left and right pin holes are formed at the outer ends of the left and right bolt columns, and a connecting hanging hole is formed at the lower part of the hanging plate;
[0008] left and right fastening nuts installed on the left and right bolt columns; and
[0009] The closed pins are inserted into the left and right pin holes of the left and right bolt columns; characterized in that:
[0010] The hanging plate is made of forged alloy structural steel 35CrMo.
[0011] In a preferred embodiment of the present utility model, symmetrically arranged left and right limiting bosses are formed at the positions where the hanging plate is connected to the left and right bolt columns.
[0012] In a preferred embodiment of the utility model, left and right flat washers are sleeved on the left and right bolt columns, and the left and right flat washers are located on the inner sides of the left and right fastening nuts.
[0013] In a preferred embodiment of the utility model, the thickness of the hanging plate is 18 mm, the distance between the outer end faces of the left and right bolt columns is 240 mm, the outer diameters of the left and right bolt columns are 30 mm, and the inner diameter of the connecting hanging hole is 26 mm.
[0014] Due to the adoption of the above technical solution, the beneficial effect of the utility model is that the main part of the utility model, i.e. the hanging plate, is forged and processed with alloy structural steel 35CrMo. After comparing and testing various materials, alloy structural steel 35CrMo is selected as the base material of the hanging plate. This material has the advantages of low temperature resistance, stable performance, and simple processing in the production of various force-bearing parts that bear impact, bending moment, and high load. After forging, the product has a higher fatigue limit after quenching and tempering, and the hardenability is higher than that of 40Cr steel. When used in low temperature areas (-35℃), compared with the previous 35 steel and 40Cr steel, the elongation of this material can reach 12, and the low temperature performance is far better than 35 steel or 40Cr steel. Therefore, the utility model can effectively prevent the product from quality failure in low temperature areas. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0016] Figure 1 It is the front view of the utility model.
[0017] Figure 2 It is a top view of the utility model.
[0018] Figure 3 It is a front view of the hanging board of the utility model.
[0019] Figure 4 It is a top view of the hanging plate of the utility model.
[0020] Figure 5 It is a longitudinal sectional view of the hanging plate of the utility model.
[0021] Figure 6 It is an installation schematic diagram of the utility model. DETAILED DESCRIPTION
[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below.
[0023] See also Figure 1 and Figure 2 , shown in the figure is a low-temperature resistant GD hanging point hardware, including a hanging plate 100, left and right fastening nuts 200a, 200b and closed pins 300a, 300b.
[0024] See also Figures 3 to 5 Combined with Figure 1 and Figure 2 , left and right bolt columns 110a and 110b extending horizontally outward are formed at the left and right sides of the upper part of the hanging plate 100, and the left and right bolt columns 110a and 110b are integrally formed with the hanging plate 100, and left and right pin holes 111a and 111b are formed at the outer ends of the left and right bolt columns 110a and 110b, and a connecting hanging hole 120 is formed at the lower part of the hanging plate 100. In this embodiment, the thickness T of the hanging plate 100 is 18 mm, the distance L between the outer end surfaces of the left and right bolt columns 110a and 110b is 240 mm, the outer diameter D of the left and right bolt columns 110a and 110b is 30 mm, and the inner diameter d of the connecting hanging hole 120 is 26 mm.
[0025] The left and right fastening nuts 200a and 200b are installed on the left and right bolt columns 110a and 110b by threading. The closing pins 300a and 300b are inserted into the left and right pin holes 111a and 111b of the left and right bolt columns 110a and 110b.
[0026] Symmetrically arranged left and right limiting bosses 130a and 130b are formed at the positions where the hanging plate 100 is connected to the left and right bolt columns 110a and 110b, and the left and right limiting bosses 130a and 130b are integrally formed with the hanging plate 100. The left and right limiting bosses 130a and 130b can increase the contact area between the hanging plate 100 and the slot plate of the iron tower, effectively improving the installation stability.
[0027] Left and right flat washers 400a and 400b are mounted on the left and right bolt columns 110a and 110b. The left and right flat washers 400a and 400b are located on the inner sides of the left and right fastening nuts 200a and 200b, thereby improving the installation stability.
[0028] The hanging plate 100 is made of alloy structural steel 35CrMo by forging. After comparing and testing various materials, alloy structural steel 35CrMo is selected as the base material of the hanging plate. This material has the advantages of low temperature resistance, stable performance, and simple processing in the production of various force-bearing parts that bear impact, bending moment, and high load. After forging, the product has a higher fatigue limit after quenching and tempering, and the hardenability is higher than that of 40Cr steel. When used in low temperature areas (-35℃), compared with the previous 35 steel and 40Cr steel, the elongation of this material can reach 12, and the low temperature performance is far better than 35 steel or 40Cr steel. Therefore, the utility model can effectively prevent the product from quality failure in low temperature areas.
[0029] See also Figure 6 The installation process of the low temperature resistant GD hanging point hardware of the utility model is as follows:
[0030] 1. First, insert the left and right bolt columns 110a and 110b of the hanging plate 100 between two adjacent slot plates 10 of the iron tower and pass through the slot holes 11 of the slot plates 10;
[0031] 2. Install the left and right flat washers 400a and 400b on the left and right bolt columns 110a and 110b, and screw in the left and right fastening nuts 200a and 200b and tighten them, so that the left and right flat washers 400a and 400b squeeze the outer side surface of the slot plate 10, and the inner side surface of the slot plate 10 abuts against the left and right limiting bosses 130a and 130b;
[0032] 3. Insert the closing pins 300a, 300b into the left and right pin holes 111a, 111b of the left and right bolt columns 110a, 110b to prevent the left and right fastening nuts 200a, 200b from loosening and falling off.
[0033] After the low-temperature resistant GD hanging point hardware of the utility model is connected to the slot plate of the iron tower, it cannot be disassembled and is subjected to force as a whole. When wind deviation occurs, the whole swings.
[0034] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.
Claims
1. A low temperature resistant GD hanging point hardware, comprising: A hanging plate, wherein left and right bolt columns extending horizontally outward are formed on the left and right sides of the upper part of the hanging plate, and left and right pin holes are formed at the outer ends of the left and right bolt columns, and a connecting hanging hole is formed at the lower part of the hanging plate; left and right fastening nuts installed on the left and right bolt columns; and The closed pins are inserted into the left and right pin holes of the left and right bolt columns; characterized in that: The hanging plate is made of forged alloy structural steel 35CrMo.
2. The low temperature resistant GD hanging point hardware according to claim 1, characterized in that: Symmetrically arranged left and right limiting bosses are formed at the positions where the hanging plate is connected to the left and right bolt columns.
3. The low temperature resistant GD hanging point hardware according to claim 1, characterized in that: Left and right flat washers are sleeved on the left and right bolt columns, and the left and right flat washers are located on the inner sides of the left and right fastening nuts.
4. The low temperature resistant GD hanging point hardware according to claim 1, characterized in that: The thickness of the hanging plate is 18 mm, the distance between the outer end faces of the left and right bolt columns is 240 mm, the outer diameters of the left and right bolt columns are 30 mm, and the inner diameter of the connecting hanging hole is 26 mm.