Stay wire protection device for blocking organisms

Abstract

The invention relates to the technical field of electric pole stay wires, in particular to a living organism blocking stay wire protection device which comprises a protection cover, the protection cover is fixed to a stay wire of an electric pole, the protection cover is hemispherical, a bottom plate is fixed to the bottom of the protection cover, and a guide frame is fixed to the side wall of the protection cover; a strip-shaped hole is formed in the bottom plate in the direction of the outer end of the guide frame, an inclined plate is fixed between the bottom of the protective cover and the side wall of the bottom plate, an anti-skid rod is arranged in the middle of the protective cover, the top end of the anti-skid rod penetrates through the top of the protective cover after passing through the strip-shaped hole, and the anti-skid rod is fixed to the periphery of the stay wire. Convex sawteeth are arranged on the inner circumference of the anti-skid rod, and a hemispherical protective cover is matched with the guide frame to form a protective cover which cannot pass through, so that various animals and plants are prevented from climbing on the electric pole.

Description

Technical Field

[0001] The invention relates to the technical field of electric pole cable pulling, in particular to a cable pulling protective device for blocking creatures. Background Art

[0002] Distribution lines are an important part of the power system. The power towers in the distribution lines are often exposed to harsh natural environments due to design requirements, and guy wires are set according to their stress to prevent the power towers from collapsing. However, the lines are in harsh environments such as mountainous areas and bushes for a long time. From time to time, forest snakes and vines will climb up the towers along the guy wires, causing power line failures, resulting in frequent power outages, and in severe cases, damage to equipment.

[0003] The Chinese invention patent with announcement number CN109865687B, published on June 28, 2022, discloses a vine processing structure on the pole wire, whose fasteners can adjust the fixed position of the baffle on the wire, and the baffle can change the growth direction of the vines, preventing the vines from attaching to the wire above the baffle, and can circumcise the vines near the wire, which can basically clean up the vines on the wire hanger, but it cannot protect against animals such as forest snakes. Summary of the invention

[0004] In view of the above technical problems, the present invention provides a wire protection device for blocking organisms, which uses a hemispherical protective cover in conjunction with a guide frame to form an impenetrable protective cover to prevent various animals and plants from climbing up the poles.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A wire protection device for blocking organisms comprises a protective cover, which is fixed to the wire of an electric pole, the protective cover is hemispherical, a bottom plate is fixed to the bottom of the protective cover, a guide frame is fixed to the side wall of the protective cover, and the bottom plate is provided with strip holes along the outer end direction of the guide frame.

[0007] Furthermore, the movement of organisms inside the protective shield satisfies the formula:

[0008] f hemisphere min = Fcosθ = 0, f hemisphere max = Fcosθ = F

[0009] Where: f is the static friction force on the organism during movement; F is the force on the organism moving along the inner wall of the protective cover.

[0010] Furthermore, an inclined plate is fixed between the bottom of the protective cover and the side wall of the bottom plate.

[0011] Furthermore, an anti-slip rod is arranged in the middle of the protective cover, and the top end of the anti-slip rod passes through the strip hole and penetrates the top of the protective cover, and the anti-slip rod is fixed to the outer periphery of the pull wire.

[0012] Furthermore, the inner periphery of the anti-slip rod is provided with convex serrations.

[0013] Furthermore, the force between the convex sawtooth and the pull wire satisfies the formula:

[0014]

[0015] Where: F represents the positive force on the anti-slip bar, and S represents the contact area between the inner periphery of the anti-slip bar and the pull wire.

[0016] Furthermore, the distance between the anti-slip bar and the bottom plate is not less than the diameter of the organism.

[0017] Furthermore, along the advancing direction of the organism, the guide frame is provided with an arc-shaped plate, and the arc-shaped plate and the protective cover form a closed opening.

[0018] Furthermore, it is assumed that the arc plate satisfies the formula:

[0019]

[0020] Where: ɑ is the angle between the arc plate and the guide frame, H is the height of the arc plate, and L is the horizontal length of the slide.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The present invention uses a hemispherical protective cover in conjunction with a guide frame to form an impenetrable protective cover to prevent various animals and plants from climbing onto the electric pole.

[0023] 2. The present invention is designed for electric power cable pulling. The hemispherical and reverse-wrapped design of the protective cover can effectively block the crawling paths of vines and forest snakes, firmly confining them inside the protective cover so that they cannot cross the cable pulling, thereby effectively reducing the occurrence of power line faults and improving the reliability of line operation.

[0024] 3. When organisms move on the surface of the pull wire, they are in a state of equilibrium. Therefore, the static friction formula is used for calculation based on the slope of the organism's movement. It can be seen from the calculation that the greater the angle encountered by the organism when moving, the smaller the inner surface friction. Therefore, the organism can be guided to move to a place with greater friction and enter the guiding part of the device, thereby enhancing the effect of the device.

[0025] 4. The present invention can be adjusted according to actual needs, adapted to different environments and line requirements, adapted to different sizes of cables, easy and quick to install, easy to promote and apply. It is also weather-resistant and can be used in outdoor environments for a long time, reducing operation and maintenance costs and improving the reliability of distribution network lines.

[0026] 5. The present invention is easy to maintain and does not require regular replacement, effectively reducing operation and maintenance costs. Compared with existing protective covers, it is easy to disassemble and replace, reducing the workload of operation and maintenance and further reducing labor costs.

[0027] 6. The anti-slip rod of the present invention adopts a convex sawtooth design, which can not only play an anti-slip effect, but also prevent the pull wire from being excessively damaged. And because of its large contact surface and certain bite, it is less likely to damage the pull wire and the friction force is also large enough. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the present invention;

[0029] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0030] Figure 3 It is a schematic diagram of the bottom structure of the present invention;

[0031] Figure 4 It is a structural schematic diagram of the anti-slip bar;

[0032] Figure 5 is a side view of the anti-slip bar;

[0033] Figure 6 It is a schematic diagram of the structure of the protective cover;

[0034] Figure 7 is a schematic diagram of the structure of the guide frame;

[0035] Figure 8 It is a schematic diagram of the use state of the present invention;

[0036] Fig. 9 It is a schematic diagram of a sawtooth structure;

[0037] Fig.10 It is a schematic diagram of the convex sawtooth structure.

[0038] The reference numerals in the accompanying drawings are:

[0039] 1. Protective cover; 2. Guide frame; 3. Anti-slip rod; 31. Convex serration; 4. Bottom plate; 5. Inclined plate; 6. Strip hole; 7. Electric pole; 8. Pull wire. DETAILED DESCRIPTION

[0040] like Figure 1-Figure 10As shown, the biological blocking pull wire 8 protection device of this embodiment includes a protective cover 1, which is fixed to the pull wire 8 of the electric pole 7. The protective cover 1 is hemispherical, and a bottom plate 4 is fixed to the bottom of the protective cover 1. A guide frame 2 is fixed to the side wall of the protective cover 1, and a strip hole 6 is opened on the bottom plate 4 along the outer end direction of the guide frame 2.

[0041] Creatures such as forest snakes and vines usually use the guy wire 8 of the pole 7 as a support for climbing upward. The existing protective device has a smooth surface, which can slow down the crawling speed of vines and forest snakes to a certain extent. However, they can still find a suitable support point through their own strength and skills and continue to climb up along the guy wire 8. For example, vines can gradually increase their height by winding and interlacing, using the gaps or protrusions on the edge of the device; while forest snakes can use their flexible bodies and strong muscle strength to bypass the blocking part of the device and continue to climb upward. In this case, the protective effect of the protective device becomes limited, and it cannot completely prevent the creatures from crossing the guy wire 8, thereby failing to effectively reduce the incidence of line failures. Therefore, the present invention sets a protective device in the middle of the pull wire 8. When creatures such as forest snakes and / or vines spirally wrap around the pull wire 8 and rise to the protective device, the creatures will first enter the interior of the protective cover 1 through the strip hole 6. Since the top of the protective cover 1 is a spherical closed structure, the supporting force received by the creatures will gradually decrease in the process of gradually moving toward the top of the protective cover 1. At this time, utilizing the characteristic that the creatures need to rely on supports to move, a guide frame 2 is set outside the strip hole 6. When the creatures find it difficult to continue moving upward, they will spontaneously move in the direction of the guide frame 2. Because the guide frame 2 extends to the outside of the protective cover 1, the protective device as a whole can prevent the creatures from crossing the pull wire 8, thereby reducing the occurrence rate of power line failures.

[0042] Furthermore, the movement of the organism inside the protective cover 1 satisfies the formula:

[0043] f hemisphere min = Fcosθ = 0, f hemisphere max = Fcosθ = F

[0044] Where: f is the static friction force on the organism during movement; F is the force on the organism moving along the inner wall of the protective cover 1.

[0045] The protective cover 1 of the present invention is the first layer of protection, which is mainly used to initially block the biological route and make it enter the device. Its shape is similar to a protective cover. Because the device needs to operate outdoors for a long time, the volume needs to be as small as possible, and the inner surface slope of the blocking part should be large enough and the friction should be small.

[0046] Therefore, assume that the device is hemispherical, with a radius of r = 10 cm and a height of h = 10 cm, and substitute it into the formula for calculation:

[0047]

[0048] When the forest snake crawls on the pull line 8, it is approximately moving at a uniform speed, and the tree vine can be considered to move slowly. Therefore, the forest snake (generally referring to animals) and the tree vine (generally referring to plants) are in a state of equilibrium when moving on the surface of the pull line 8. Therefore, according to the slope of the biological movement, the static friction formula is used for calculation. Suppose the external force along the inclined plane of the biological movement is F. Under the action of F, the biological movement remains stationary or moves at a uniform speed.

[0049] It can be known from calculation that the hemispherical friction force varies from 0 to F depending on the angle. The larger the angle, the smaller the inner surface friction force, which can just guide the organism to move to the place with large friction force and enter the guiding part of the device, so that the effect of the device is enhanced. Therefore, the hemispherical protective cover 1 is selected as the structure of the blocking part of the device.

[0050] Furthermore, an inclined plate 5 is fixed between the bottom of the protective cover 1 and the side wall of the bottom plate 4 .

[0051] The inclined plate 5 is arranged in a direction opposite to the guide frame 2. The inclined plate 5 can further increase the inclination angle to better prevent the organisms from moving upward. The inclined plate 5 cooperates with the bottom plate 4 to form the second protection of the device, which mainly prevents the organisms from moving upward after entering the device, and can effectively prevent the organisms from bypassing the device and guide the organisms back to the bottom of the device. Its inclined design makes it difficult for the organisms to find a support point for climbing, thereby effectively preventing the organisms from continuing to rise. In addition, the inclined plate 5 adds a part of the device with a larger curvature above the bottom plate 4, so that the volume of the protective cover 1 and the entire device is smaller, which is easier to install and transport.

[0052] Furthermore, an anti-slip rod 3 is provided in the middle of the protective cover 1 , and the top end of the anti-slip rod 3 passes through the strip hole 6 and penetrates the top of the protective cover 1 , and the anti-slip rod 3 is fixed to the periphery of the pull wire 8 .

[0053] Furthermore, the anti-slip bar 3 is provided with convex serrations 31 on its inner periphery.

[0054] Furthermore, the force between the convex sawtooth 31 and the pull wire 8 satisfies the formula:

[0055]

[0056] Wherein: F represents the positive force applied to the anti-slip bar 3 , and S represents the contact area between the inner periphery of the anti-slip bar 3 and the pull wire 8 .

[0057] Since the present invention is fixed on the cable 8, and may also be fixed on the cable 8 protected by a shield, in order to ensure that the present invention does not slip, it is necessary to design an anti-skid structure at the connection between the present invention and the cable 8 to increase the friction. In actual distribution network line operation, the cable 8 used by the pole 7 is mostly steel-core aluminum stranded wire, and some of the cable 8 is equipped with a plastic protective sleeve. Therefore, the device needs to face two situations during installation: the first is the cable 8 without a protective sleeve, and the second is the cable 8 with a protective sleeve.

[0058] According to actual needs, a deductive comparative test was conducted on the anti-slip performance of the device, and the rules were summarized:

[0059] Since the contact area of ​​the sawtooth tooth peak contact surface is the smallest compared with the convex sawtooth tooth peak contact surface, the measured value of the sawtooth tooth peak contact surface must be the minimum value. The inventors use the sawtooth tooth peak contact surface as a control group and name this value as the minimum tooth peak contact area, denoted as S Min齿峰接触面 , while the contact area of ​​convex serrated type was used as the experimental group.

[0060]

[0061] Table 1 Comparative test of contact area and stress of wire 8

[0062] The inventor team found that when the contact area of ​​the convex sawtooth tooth peak reaches 7 times the contact area of ​​the sawtooth, the positive force F reaches its maximum value. Therefore, the maximum value of F is named the optimal pull wire 8 anti-slip stress.

[0063] When the device is fixed on the pull wire 8, it is equivalent to applying a positive force F to the pull wire 8. The sawtooth contact area is M, and the contact area of ​​the convex sawtooth tooth peak is equivalent to 7 times the sawtooth contact area. Combined with Pascal's formula (P=F / S), it can be seen that under the same pressure, the larger the actual contact area, the stronger the friction and the better the anti-slip performance; the smaller the actual contact area, the sharper the tooth peak, and the greater the damage to the pull wire 8.

[0064] In summary, the convex sawtooth design can not only prevent slipping, but also prevent the cable 8 from being damaged too much. In addition, due to its large contact surface and certain bite, it is less likely to damage the cable 8, and the friction force is also large enough.

[0065] S convex sawtooth type = 7S sawtooth type = 7M

[0066]

[0067] Furthermore, the distance between the anti-slip bar 3 and the bottom plate 4 is not less than the diameter of the organism.

[0068] To prevent organisms from being directly entangled around the outer periphery of the protective cover 1, the distance between the bottom plate 4 and the anti-slip rod 3 is greater than or equal to the diameter of the organism climbing up the pull wire 8, to ensure that the organism will enter the interior of the protective cover 1 and move downward to the protective cover 1 through the setting of the guide frame 2, inclined plate 5 and other devices after entering.

[0069] Furthermore, along the advancing direction of the organism, the guide frame 2 is provided with an arc plate, and the arc plate and the protective cover 1 form a closed end.

[0070] The part where the top of the guide frame 2 is connected to the protective cover 1 forms a simple closing design, which can effectively prevent the creature from being unable to touch the outer periphery of the protective cover 1 when climbing out of the guide frame 2, that is, prevent the creature from bypassing the protective device and returning to the pull line 8. The closing design limits the space of the creature at the end of the slide, making it difficult to turn around or change direction, thereby ensuring that it can eventually leave the device. The experimental process is shown in Table 2:

[0071]

[0072]

[0073] Table 2: Control experiment of closing design Further, it is assumed that the curved plate satisfies the formula:

[0074]

[0075] Wherein: ɑ is the angle between the arc plate and the guide frame 2, H is the height of the arc plate, and L is the horizontal length of the slide.

[0076] The curved plate has a smooth surface and is arranged at different positions of the pull wire 8 according to By setting different tilt angles, after creatures such as forest snakes and / or vines enter the device, they will naturally move toward the end of the curved plate due to the influence of gravity and the guidance of the curved plate surface, and eventually leave the device and fall to the ground.

[0077] Experimental analysis shows that the slopes listed in Table 1 below are most effective in guiding organisms to move downward along the route.

[0078]

[0079] Table 3 Slope of each position of the guide part

[0080] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A wire protection device for blocking organisms, comprising a protective cover (1), wherein the protective cover (1) is fixed to a wire (8) of an electric pole (7), and characterized in that: The protective cover (1) is hemispherical, a bottom plate (4) is fixed to the bottom of the protective cover (1), a guide frame (2) is fixed to the side wall of the protective cover (1), and a strip-shaped hole (6) is opened on the bottom plate (4) along the outer end direction of the guide frame (2).

2. A wire protection device for blocking organisms according to claim 1, characterized in that: The movement of organisms inside the protective cover (1) satisfies the formula: f hemisphere min = Fcosθ = 0, f hemisphere max = Fcosθ = F Where: f is the static friction force on the organism during movement; F is the force on the organism moving along the inner wall of the protective cover (1).

3. A wire protection device for blocking organisms according to claim 1, characterized in that: An inclined plate (5) is fixed between the bottom of the protective cover (1) and the side wall of the bottom plate (4).

4. A wire protection device for blocking organisms according to claim 1, characterized in that: An anti-slip rod (3) is arranged in the middle of the protective cover (1), the top end of the anti-slip rod (3) passes through the strip hole (6) and penetrates the top of the protective cover (1), and the anti-slip rod (3) is fixed to the outer periphery of the pull wire (8).

5. A wire protection device for blocking organisms according to claim 4, characterized in that: The anti-slip rod (3) is provided with convex saw teeth (31) on its inner periphery.

6. A wire protection device for blocking organisms according to claim 5, characterized in that: The force between the convex sawtooth (31) and the pull wire (8) satisfies the formula: Wherein: F is the positive force applied to the anti-slip bar (3), and S is the contact area between the inner periphery of the anti-slip bar (3) and the pull wire (8).

7. A wire protection device for blocking organisms according to claim 4, characterized in that: The distance between the anti-slip rod (3) and the bottom plate (4) is not less than the diameter of the organism.

8. A wire protection device for blocking organisms according to claim 1, characterized in that: Along the advancing direction of the organism, the guide frame (2) is provided with an arc-shaped plate, and the arc-shaped plate and the protective cover (1) form a closed end.

9. A wire protection device for blocking organisms according to claim 8, characterized in that The arc plate satisfies the formula: Wherein: ɑ is the angle between the arc plate and the guide frame (2), H is the height of the arc plate, and L is the horizontal length of the slide.

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