Universal bypass drainage device

Abstract

The present invention discloses a universal bypass drainage device, belonging to the technical field of power equipment, comprising two fixed blocks connected by copper core stranded wire, a first arc-shaped claw, and a second arc-shaped claw. One side of the fixed block is provided with a second arc-shaped portion for arranging the wire. The fixed block is fixed with a first arc-shaped claw on one side of the second arc-shaped portion. The fixed block is rotatably provided with an arc-shaped plate on the other side of the second arc-shaped portion. The arc-shaped plate is fixed with a second arc-shaped claw. The first arc-shaped claw and the second arc-shaped claw are staggered. A butterfly bolt is passed through one end of the fixed block. The end of the butterfly bolt is rotatably connected to the arc-shaped plate. The advantages of the present invention are that the universal bypass drainage device is fast to install and easy to operate. Only one person is required to install the auxiliary drainage line. The auxiliary drainage line (soft copper stranded wire) is light in weight, small in size, and easy to carry. The copper has good thermal conductivity, which helps to dissipate heat from the equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power equipment, and in particular to a universal bypass drainage device. Background Art

[0002] Overheating of drain plates is a common problem during the operation of ultra-high / ultra-high voltage transmission lines, especially during peak summer periods when the lines are heavily loaded or overloaded. This overheating can reach temperatures exceeding 200°C or even 500°C. If not promptly addressed, the temperature reaches the melting point of the metal fittings (660°C), causing the drain plates to melt, resulting in the disconnection of jumpers, which can cause line tripping and even grid instability, leading to severe economic and financial losses. If a power outage is implemented to address this issue, the load in the affected area must be transferred to other power sources or lines. This process is complex and, if not carried out promptly or smoothly, may prevent some load from being transferred, resulting in overload or power shortages in certain areas of the grid. Furthermore, even after the outage is resolved, restoring power can take time, including checking the status of line equipment and gradually restoring power transmission. During this period, some areas or users may not receive power, causing fluctuations and instability in the grid load. To avoid economic losses, live-line operations are often used to address this issue.

[0003] When dealing with overheating drain plates at the National Power Transmission and Transformation Company, the current method is for workers to bring a parallel groove clamp and a drain wire of the same cross-section to the work site. They then install a drain wire at both ends of the heated drain plate (the conductor end and the jumper end), connecting the two ends with a parallel groove clamp. Upon arrival, electricians first install the parallel groove clamp on the conductor side, ensuring the bolts are tightened, before moving to the jumper side and installing the parallel groove clamp.

[0004] like Figure 4-5 As shown, existing drainage devices are inadequate and complex. As shown in the figure, the parallel groove clamp has numerous bolts, which can easily fall during disassembly and assembly, posing a risk of falling objects. Furthermore, installation requires two people: one person holds the parallel groove clamp and the secondary drainage line while the other tightens the bolts. The parallel groove clamp is a complex and time-consuming process, particularly during the peak summer heat. The high temperatures can cause heatstroke and, if not handled properly, can even endanger workers' lives.

[0005] Commonly used parallel groove clamps are slow to install and cannot be installed quickly to cool the heated wires.

[0006] There are many types of existing UHV line conductors with cross-sectional areas ranging from 400-1250mm 2Different cross-sectional area wires require different parallel groove clamp devices to clamp the wires and drain wires, which makes the preparation process cumbersome.

[0007] The auxiliary drainage line adopts steel core aluminum stranded wire. Due to the limitation of the parallel groove wire clamp device, it is necessary to use wires with the same cross-section. A 400-1250mm 2 The steel core aluminum stranded wire is heavy and inconvenient to carry. Summary of the Invention

[0008] In view of the shortcomings of the prior art, the present invention aims to provide a universal bypass drainage device.

[0009] The technical solution of the present invention is as follows: A universal bypass drainage device includes two fixed blocks connected by copper core stranded wires, a first arc-shaped claw and a second arc-shaped claw, a second arc-shaped portion for placing the wire on one side of the fixed block, a first arc-shaped claw is fixed on one side of the second arc-shaped portion of the fixed block, an arc-shaped plate is rotatably provided on the other side of the second arc-shaped portion of the fixed block, a second arc-shaped claw is fixed on the arc-shaped plate, the first arc-shaped claw and the second arc-shaped claw are staggered, a butterfly bolt is passed through one end of the fixed block, and the end of the butterfly bolt is rotatably connected to the arc plate.

[0010] Preferably, a first arc-shaped portion is provided on the fixing block on the same side as the second arc-shaped portion, and a space on one side of the first arc-shaped portion is provided for the arc-shaped plate to unfold.

[0011] Preferably, a first fixing tube is fixed to one end of the fixing block, a through hole for a butterfly bolt to pass through is opened in the middle of the first fixing tube, a first rotating shaft is rotatably arranged inside the first fixing tube, and the butterfly bolt is arranged vertically through the first rotating shaft.

[0012] Preferably, a third fixing tube is fixed on the arc plate, a slot for the end of the butterfly bolt to pass through is opened in the middle of the third fixing tube, a third rotating shaft is rotatably arranged inside the third fixing tube, and the third rotating shaft and the butterfly bolt are vertically connected.

[0013] Preferably, a second fixing tube is fixed on one side of the second arc-shaped portion of the fixing block, an arc-shaped notch is opened on the second fixing tube, a second rotating shaft is provided inside the second fixing tube, and the arc-shaped plate is fixedly connected to the second rotating shaft at the position of the arc-shaped notch.

[0014] Preferably, when the first arc-shaped claw and the second arc-shaped claw clamp the wire;

[0015] First state: the ends of the first arc-shaped claw and the second arc-shaped claw are in a straight line;

[0016] Second state: the first arc-shaped claw and the second arc-shaped claw are in a crossed state.

[0017] Preferably, a fixing notch for connecting the copper core stranded wire is provided at the bottom of the fixing block, the fixing block and the copper core stranded wire are fixedly connected, and the right angle of the fixing notch is larger than the diameter of the copper core stranded wire.

[0018] Preferably, the first arc-shaped portion, the second arc-shaped portion and the arc-shaped plate have the same arc angle.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. This universal bypass drainage device is quick to install and easy to operate. Only one person is needed to install the auxiliary drainage wire. The auxiliary drainage wire (soft copper stranded wire) is light in weight and small in size, making it easy to carry. Copper has good thermal conductivity, which helps dissipate heat from the equipment.

[0021] 2. Compared with the multiple bolts of the parallel groove wire clamp device, the structure of this device is greatly simplified and the working efficiency is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The disclosure of the present invention is described with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of the present invention. In the drawings, the same reference numerals are used to refer to the same components. Among them:

[0023] Figure 1 Schematic diagram of the structure of the universal bypass drainage device of the present invention;

[0024] Figure 2 This is a schematic structural diagram of the first arc-shaped claw and the second arc-shaped claw when connected;

[0025] Figure 3 This is a schematic structural diagram of the present invention when two fixing blocks are connected;

[0026] Figure 4 This is a schematic diagram of the structure of the bypass drainage device when it is connected;

[0027] Figure 5 It is a structural schematic diagram of the clamping device of the background technology of the present invention.

[0028] Explanation of the markings in the figure: 10, fixed block; 11, first arc-shaped portion; 12, second arc-shaped portion; 13, fixed notch; 20, first fixed tube; 21, first rotating shaft; 30, arc-shaped plate; 31, second fixed tube; 32, second rotating shaft; 40, first arc-shaped claw; 50, second arc-shaped claw; 60, third fixed tube; 61, third rotating shaft. DETAILED DESCRIPTION

[0029] It is easy to understand that according to the technical solution of the present invention, without changing the essential spirit of the present invention, a person skilled in the art can propose a variety of interchangeable structural modes and implementation modes. Therefore, the following specific embodiments and drawings are only exemplary descriptions of the technical solution of the present invention and should not be regarded as the entire invention or as a limitation or restriction of the technical solution of the present invention.

[0030] like Figure 1 and Figure 3 As shown, as a universal bypass drainage device of the present invention, it includes two fixed blocks 10 connected by copper core stranded wires, a first arc-shaped claw 40 and a second arc-shaped claw 50, a second arc-shaped portion 12 for arranging the wire is provided on one side of the fixed block 10, and the first arc-shaped claw 40 is fixed on one side of the second arc-shaped portion 12 of the fixed block 10, and an arc-shaped plate 30 is rotatably provided on the other side of the second arc-shaped portion 12 of the fixed block 10, and the second arc-shaped claw 50 is fixed on the arc-shaped plate 30. The first arc-shaped claw 40 and the second arc-shaped claw 50 are staggered. A butterfly bolt 70 is passed through one end of the fixed block 10, and the end of the butterfly bolt 70 is rotatably connected to the arc plate 30.

[0031] Specifically, the wire that needs to be drained is placed in the space between the first arc-shaped claw 40 and the second arc-shaped claw 50. The first arc-shaped claw 40 and the second arc-shaped claw 50 are used to clamp the wire. The user rotates the butterfly bolt 70 to drive the arc plate 30 to rotate, thereby driving the second arc-shaped claw 50 on the arc plate 30 to move accordingly. When the first arc-shaped claw 40 and the second arc-shaped claw 50 fix the wire, the butterfly bolt 70 can be stopped from rotating, and the position of the second arc-shaped claw 50 can be fixed by the butterfly bolt 70, and the installation of the bypass drainage device can be completed. In this way, the installation speed is fast and the operation is simple. Only one person is needed to install the auxiliary drainage line, and the actual application effect is better.

[0032] like Figure 1-2 As shown, a first arc-shaped portion 11 is provided on the fixing block 10 on the same side as the second arc-shaped portion 12. The space on one side of the first arc-shaped portion 11 is provided for the arc-shaped plate 30 to unfold, so that there is enough space for the first arc-shaped portion 11 to move during the unfolding process. When installing and connecting the bypass drainage device, the user can conveniently connect the first arc-shaped claw 40 and the second arc-shaped claw 50 to the wire in time, making the installation and connection easier and the actual installation efficiency higher.

[0033] like Figure 1-2As shown, a first fixing tube 20 is fixed to one end of the fixing block 10, and a through hole for the butterfly bolt 70 to pass through is opened in the middle of the first fixing tube 20. A first rotating shaft 21 is rotatably arranged inside the first fixing tube 20, and the butterfly bolt 70 is arranged vertically through the first rotating shaft 21. Through this structural arrangement, the first rotating shaft 21 can be rotated in the first fixing tube 20. When the position of the curved plate 30 is adjusted, the butterfly bolt 70 can be rotated to a suitable position, so that the butterfly bolt 70 has a better limiting effect on the curved plate 30. At the same time, during the process of adjusting the butterfly bolt 70 to the curved plate 30, it will not be blocked by the first fixing tube 20, and the actual application effect is better.

[0034] like Figure 1-2 As shown, a third fixing tube 60 is fixed on the curved plate 30, and a slot is provided in the middle of the third fixing tube 60 for the end of the butterfly bolt 70 to pass through. A third rotating shaft 61 is rotatably provided inside the third fixing tube 60, and the third rotating shaft 61 and the butterfly bolt 70 are vertically connected. Through this structural setting, when the butterfly bolt 70 drives the curved plate 30 to rotate, the butterfly bolt 70 can drive the third rotating shaft 61 located in the third fixing tube 60 to rotate, and the angle of the curved plate 30 can be adjusted over a wide range.

[0035] like Figure 1-2 As shown, a second fixing tube 31 is fixed on the fixing block 10 on one side of the second arc-shaped portion 12, an arc-shaped notch is opened on the second fixing tube 31, a second rotating shaft 32 is provided inside the second fixing tube 31, and the second rotating shaft 32 is fixedly connected to the arc plate 30 at the position of the arc notch, so that the arc plate 30 and the fixing block 10 are connected as one, so that the arc plate 30 always rotates around the fixing block 10.

[0036] like Figure 1-2 As shown, when the first arc-shaped claw 40 and the second arc-shaped claw 50 clamp the wire;

[0037] First state: The ends of the first arc-shaped claw 40 and the second arc-shaped claw 50 are in a straight line, which can clamp large-diameter wires;

[0038] Second state: the first arc-shaped claw 40 and the second arc-shaped claw 50 are in a crossed state, which can clamp small-sized wires. The first arc-shaped portion 11, the second arc-shaped portion 12 and the arc-shaped plate 30 have the same arc angle.

[0039] This structural setting can make its application scope wider, and it is suitable for wires of various sizes to perform bypass drainage operations, and the actual application effect is better.

[0040] like Figure 1-2As shown, a fixing slot 13 for connecting the copper core stranded wire is provided at the bottom of the fixing block 10. The fixing block 10 and the copper core stranded wire are fixedly connected. The right angle of the fixing slot 13 is larger than the diameter of the copper core stranded wire, and the two fixing blocks 10 are connected by the copper core stranded wire.

[0041] Current carrying capacity calculation: The existing steel core aluminum stranded wire is heavy, bulky and inconvenient to carry, so we are looking for alternatives. The following is a theoretical calculation of the current carrying capacity to verify the current carrying capacity of the soft copper stranded wire.

[0042] Currently, there are three mainstream methods for calculating current carrying capacity: the table lookup method, the IEEE method, and the Morgan formula method. The table lookup method is the simplest; after limiting the calculation conditions, one can consult the "Quick Lookup Table of Overhead Conductor Current Carrying and Transmission Capacity." The IEEE method and the Morgan formula method share the same calculation principles, but their formulas differ. Both methods are based on the principle of thermal balance, which states that at the conductor's maximum allowable operating temperature, the heat generated by the conductor balances the heat lost. The current flowing through the conductor at this time is the allowable current carrying capacity. Heat generated by the conductor during operation comes from the resistance of the current flowing through the line and from sunlight, while heat is lost through radiation and convection.

[0043] Because the Morgan formula method is the most widely used and is also the calculation method recommended by GB50545-2010, this article chooses to use the Morgan formula method to calculate the current carrying capacity.

[0044] The formula for calculating the current carrying capacity is:

[0045]

[0046] W R is the radiation heat dissipation power (W / m), and its value is

[0047]

[0048] D is the wire diameter (m); ε is the wire surface radiation heat dissipation coefficient, which is 0.23 to 0.43 for new bright wire and 0.9 to 0.95 for old wire or wire coated with black preservative; S is the Stefan-Boltzmann constant, 5.67×10-8W / m 2 ; tp is the allowable surface temperature of the conductor (℃); ta is the ambient temperature (℃).

[0049] W F is the convection heat dissipation power (W / m), and its value is

[0050]

[0051] v is the wind speed perpendicular to the conductor (m / s).

[0052] Ws is the solar heat absorption power (W / m), and its value is:

[0053] Ws=αJD

[0054] Where α is the surface heat absorption coefficient of the conductor, which is 0.35-0.46 for bright new wires and 0.9-0.95 for old wires or wires coated with black preservatives; J is the sunlight intensity on the conductor.

[0055] R t is the AC resistance (Ω / m) at the allowable temperature, and its value is:

[0056] R t =kR 20 [1+β(t p -20)]

[0057] R 20 is the DC resistance of the wire at 20°C, α is the temperature coefficient of resistance of the wire at 20°C, and β is the AC / DC resistance ratio, which reflects the resistance changes caused by eddy currents, hysteresis, skin effect, and proximity effect. The calculation process is complex. Due to the influence of skin effect and proximity effect, the AC / DC resistance ratio k of copper wire is usually between 1.0 and 1.1. For simplicity, we can use a typical value of k = 1.005.

[0058] In this calculation process, the maximum allowable temperature tp is 80℃, the ambient temperature ta is 40℃, the calculated wind speed v is 0.5m / s, the conductor surface radiation heat dissipation coefficient ε is 0.9, the conductor surface heat absorption coefficient α is 0.9, and the sunlight intensity J on the conductor is 1000W / ㎡ when sunlight directly shines on the conductor on a sunny day.

[0059] The following table shows the calculated current carrying capacity of soft copper stranded wires with different cross-sectional areas.

[0060]

[0061] Transmission lines of different voltage levels were selected as references. The ±1100kV Jiquan line has a transmission capacity of 12000MV, a rated current of 5455A, a maximum overload current of 6446A (14400MV), and uses 8×JL1 / G3A-1250 / 70 steel core aluminum stranded wire. The current of a single sub-conductor is 681.875A to 818.25A, and 315 cross-section soft copper stranded wire can be used instead. The ±800kV Jinsu line has a transmission capacity of 7200MV, a load current of 3500 to 4500A, and uses 6×

[0062] JL / G3A-900 / 40 steel-core aluminum stranded conductor (SCRC), with a single conductor carrying a current of 583.3333333A to 750A, can be replaced with 250mm or 315mm cross-section soft copper stranded conductor. The ±500kV Genan / Linfeng line, with a transmission capacity of 3000MV and a rated current of 3000A, uses 4×ACSR-720 / 50 steel-core aluminum stranded conductor (SCRC), with a single conductor carrying a current of 750A. 250mm cross-section soft copper stranded conductor can be used instead.

[0063] Assuming that the length of the drainage line is 2 meters, the following weight comparison table can be obtained.

[0064] Steel core aluminum stranded wire model Weight (kg) Cross-sectional area of ​​soft copper stranded wire Weight (kg) JL1 / G3A-1250 / 70 8.0222 315 5.908 JL / G3A-900 / 40 5.5804 250 4.794 ACSR-720 / 50 4.7954 250 4.794

[0065] As can be seen from the figure above, using soft copper stranded wire as a drain wire is lighter than steel-core aluminum stranded wire. Moreover, because soft copper stranded wire with a small cross-section already has a strong current-carrying capacity, a prominent advantage of using soft copper stranded wire as a drain wire is its small size, light weight, and ease of portability. When working under the scorching sun, this can greatly reduce the physical exertion of workers.

[0066] The technical scope of the present invention is not limited to the contents of the above description. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical idea of ​​the present invention, and these deformations and modifications should all fall within the protection scope of the present invention.

Claims

1. A universal bypass drainage device, characterized by: The invention comprises two fixed blocks (10) connected by copper core stranded wires, a first arc-shaped claw (40) and a second arc-shaped claw (50), wherein a second arc-shaped portion (12) for arranging the electric wire is provided on one side of the fixed block (10), a first arc-shaped claw (40) is fixed on one side of the second arc-shaped portion (12) on the fixed block (10), an arc-shaped plate (30) is rotatably provided on the other side of the second arc-shaped portion (12) on the fixed block (10), a second arc-shaped claw (50) is fixed on the arc-shaped plate (30), the first arc-shaped claw (40) and the second arc-shaped claw (50) are staggered, a butterfly bolt (70) is passed through one end of the fixed block (10), and the end of the butterfly bolt (70) is rotatably connected to the arc-shaped plate (30); The fixing block (10) is provided with a first arc-shaped portion (11) on the same side as the second arc-shaped portion (12), and a space on one side of the first arc-shaped portion (11) is provided for the arc-shaped plate (30) to be unfolded; A first fixing tube (20) is fixed to one end of the fixing block (10), a through hole for a butterfly bolt (70) to pass through is provided in the middle of the first fixing tube (20), a first rotating shaft (21) is rotatably provided inside the first fixing tube (20), and the butterfly bolt (70) is vertically passed through the first rotating shaft (21).

2. A universal bypass drainage device according to claim 1, characterized in that: A third fixing tube (60) is fixed on the arc-shaped plate (30), a slot for the end of the butterfly bolt (70) to pass through is provided in the middle of the third fixing tube (60), a third rotating shaft (61) is rotatably provided inside the third fixing tube (60), and the third rotating shaft (61) and the butterfly bolt (70) are vertically connected.

3. A universal bypass drainage device according to claim 2, characterized in that: A second fixing tube (31) is fixed on one side of the second arc-shaped portion (12) on the fixing block (10), an arc-shaped notch is provided on the second fixing tube (31), a second rotating shaft (32) is provided inside the second fixing tube (31), and the second rotating shaft (32) is fixedly connected to the arc-shaped plate (30) at the position of the arc-shaped notch.

4. A universal bypass drainage device according to claim 3, characterized in that: When the first arc-shaped claw (40) and the second arc-shaped claw (50) clamp the electric wire; First state: the ends of the first arc-shaped claw (40) and the second arc-shaped claw (50) are in a straight line state; Second state: the first arc-shaped claw (40) and the second arc-shaped claw (50) are in a crossed state.

5. The universal bypass drainage device according to claim 3, characterized in that: A fixing notch (13) for connecting the copper core stranded wire is provided at the bottom of the fixing block (10), the fixing block (10) and the copper core stranded wire are fixedly connected, and the fixing notch (13) has a right angle greater than the diameter of the copper core stranded wire.

6. The universal bypass drainage device according to claim 3, characterized in that: The first arc-shaped portion (11), the second arc-shaped portion (12) and the arc-shaped plate (30) have the same arc angle.

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