A multi-strand bidirectional parallel power transmission cable

Abstract

The present invention relates to the technical field of high-voltage power transmission. The present application discloses a multi-strand bidirectional parallel power transmission cable, comprising a travel rod, which is movably installed inside a travel pipe, a first spring is fixedly installed at the bottom of the travel rod, an insulating lock buckle for connecting the cable is fixedly installed on the top of the travel rod, a second spring for connecting to a connecting base is fixedly installed at the bottom of the travel rod, and a first spring fixedly installed at the bottom of the travel rod for fixed connection with the travel pipe, so that the locking device as a whole can freely expand and contract inside the travel pipe and is limited by the first spring. When the cable fixedly sleeved by the insulating lock buckle becomes too loose, the force acting on the device by the cable can be released by the expansion and contraction of the travel rod, thereby ensuring that the equipment used to support the deadweight of the cable is always an iron tower connected to both ends of the cable. The present application document avoids this problem well and improves the stability of the operation of the device.

Description

Technical Field

[0001] The present application relates to the technical field of high voltage power transmission, and in particular to a multi-strand bidirectional parallel power transmission cable. Background Art

[0002] In UHV power transmission operations, due to the use of exposed transmission cables, once the transmission lines come into contact with each other, it will cause a short circuit, tripping and power supply cessation. This situation may occur in some complex and windy environments. In order to avoid this situation, partition frames are used to fix the cables during the line installation process, so that the swing amplitude of each cable is reduced when the wind speed is fast, and the swing amplitude is the same, greatly reducing the risk of cable contact.

[0003] In order to avoid this situation, a partition frame will be installed on the outside of the cable. The traditional partition frame for multi-strand bidirectional parallel transmission cables is composed of a polygonal bracket, and an insulating cable clip is fixed at the corner of the outer side of the polygonal bracket to fix the transmission cable. The number of partition frames installed is determined by the span of the cable, which increases the load on the cable to a certain extent. This type of high-voltage transmission partition frame composed of a polygonal bracket has the advantages of simple structure, easy use and low cost, and is currently the most widely used one.

[0004] Although the existing high-voltage power transmission partition frame composed of polygonal brackets has the above-mentioned advantages, it still has certain limitations in actual use. Since the cable clips are connected to the brackets in a rigid manner and the cables have different degrees of slack, once the upper cable is too slack, the weight of this cable will act on the lower cable through the partition frame, resulting in an increase in the load on the lower cable. Once there are too many slack cables, the lowermost cable will bear a greater load, greatly reducing the service life of the cable. In this regard, the present application document proposes a high-voltage power transmission partition frame composed of polygonal brackets, aiming to solve the above-mentioned problems. Summary of the invention

[0005] The present application proposes a multi-strand bidirectional parallel power transmission cable, which has the advantage of being elastically retractable through sliding fit, and is used to solve the problem of increased load on the lower cable caused by excessive cable relaxation.

[0006] To achieve the above-mentioned purpose, the present application adopts the following technical solution: a multi-strand bidirectional parallel power transmission cable, comprising a main body support, the outer surface of the main body support is provided with a travel pipe, the number of the travel pipes is six, the interior of the travel pipe is movably installed with a locking device in a telescopic manner, the top and bottom of the inner side of the main body support are fixedly installed with a connecting pipe, the bottom of the inner cavity of the connecting pipe is movably sleeved with a windward device through a bearing connection, the interior of the windward device is movably sleeved with a rotating device through a bearing connection, and the tail end of the windward device is fixedly installed with a torque spring for connecting the rotating device;

[0007] A cable is fixedly sleeved at one end of the locking device. The cable adopts a multi-strand parallel bidirectional transmission mode, and the maximum number of strands does not exceed four. Under the action of the locking device, the cables are spaced apart to prevent short circuit caused by mutual contact. The locking device is made of steel-core aluminum stranded wire, which can carry out bidirectional power transmission at the same time.

[0008] Furthermore, the locking device includes a travel rod, which is movably installed in a telescopic manner inside the travel pipe, the bottom of the travel rod is fixedly installed with a first spring for fixed connection with the travel pipe, the top of the travel rod is fixedly installed with an insulating lock buckle for connecting a cable, and the bottom of the travel rod is fixedly installed with a second spring for connecting to a connecting base.

[0009] Furthermore, the windward device includes a connecting sleeve, and a connecting shaft for connecting a connecting pipe is fixedly installed on the top and bottom of the outer surface of the connecting sleeve. A connecting channel is provided on the top of the connecting shaft, and the number of the connecting channels is three and distributed in parallel. A rotating device is connected to a movable sleeve through a bearing at a position near the tail end of the inner wall of the connecting channel.

[0010] Furthermore, the rotating device includes a guide tube, and fan blades are arranged on the inner wall of the guide tube near the tail end, and the fan blades are distributed in a circular array. An annular connecting plate is fixedly installed on the outer surface of the guide tube near the tail end, and the annular connecting plate is connected to the tail end of the connecting sleeve through a torque spring.

[0011] Furthermore, the diameter of the front end opening of the guide tube is larger than the diameter of the rear end opening, and the cross-sectional shape of the guide tube is a combination of a truncated cone and a cylinder.

[0012] Furthermore, a traction rope is provided at the bottom of the connection base, and the traction rope passes through the communication channel and is connected to the outer surface of the guide tube.

[0013] Furthermore, the torque spring provides torque to the entire rotating device in an initial state, and under the action of the torque, the traction rope connected to the bottom of the base is wound around the outer surface of the guide tube.

[0014] This application has the following beneficial effects.

[0015] 1. When the bending degree of the transmission cable is different, the force acting on the device by the cable is released by the extension and retraction of the travel rod, ensuring that the equipment used to support the weight of the cable is always the iron tower connected to both ends of the cable, rather than other transmission cables, thereby improving the stability of the operation of the device.

[0016] 2. When the wind is strong, the airflow can enter the interior of the guide tube and generate torque at the connection with the fan blades. The rotating device is reset, so that the traction line wrapped around the outer surface of the guide tube is released. Under the action of the first spring, the locking device as a whole can extend out from the inside of the travel pipe, so that the distance between the cables is increased, reducing the probability of direct contact between the cables, and the entire adjustment process is automated and does not require human intervention.

[0017] 3. The front opening diameter of the guide tube is larger than the rear opening diameter, so that the airflow can better enter the interior of the guide tube, and the flow velocity increases continuously in the process of passing through the guide tube, which has a stronger force on the fan blades and generates a greater torque, ensuring that the cables maintain a larger spacing in strong wind conditions.

[0018] 4. After the windward device rotates as a whole, the traction ropes connected to the bottom of the base will be entangled with each other and generate a reset torque. When the wind stops, the windward device can be reset as a whole under the action of the reset torque, ensuring that the device can operate normally when the wind blows next time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which constitute a part of the specification, illustrate embodiments disclosed in the present application and, together with the description, serve to explain the principles disclosed in the present application.

[0020] The present disclosure may be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Figure 2 It is a front view of the structure of the present invention;

[0023] Figure 3 The structure of the present invention Figure 2 Sectional view in the A direction;

[0024] Figure 4 The structure of the present invention Figure 3 Cross-section along the middle B direction;

[0025] Figure 5 The structural locking device of the present invention;

[0026] Figure 6It is a schematic diagram of the windward device and the rotating device of the structure of the present invention;

[0027] Figure 7 It is a front view of the windward device and the rotating device of the structure of the present invention;

[0028] Figure 8 The structure of the present invention Figure 7 Sectional view in the middle C direction;

[0029] Fig. 9 The structure of the present invention Figure 8 Cross-sectional view in the middle D direction.

[0030] In the figure; 1. main bracket; 2. travel pipe; 3. locking device; 31. travel rod; 32. first spring; 33. insulating lock buckle; 34. connecting base; 35. second spring; 4. connecting pipe; 5. windward device; 51. connecting sleeve; 52. connecting shaft; 53. connecting channel; 6. rotating device; 61. guide pipe; 62. fan blade; 63. annular connecting plate; 7. torque spring; 8. cable. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0032] A multi-strand bidirectional parallel power transmission cable, see Figure 1-Figure 4 , comprising a main body support 1, the outer surface of the main body support 1 is provided with a travel pipe 2, the number of the travel pipes 2 is six, the interior of the travel pipe 2 is movably installed with a locking device 3 in a telescopic manner, the top and bottom of the inner side of the main body support 1 are fixedly installed with a connecting pipe 4, the bottom of the inner cavity of the connecting pipe 4 is movably sleeved with a windward device 5 through a bearing connection, the interior of the windward device 5 is movably sleeved with a rotating device 6 through a bearing connection, and the tail end of the windward device 5 is fixedly installed with a torque spring 7 for connecting the rotating device 6;

[0033] A cable 8 is fixedly sleeved at one end of the locking device 3. The cable 8 adopts a multi-strand parallel bidirectional transmission mode, and the maximum number of strands does not exceed four. Under the action of the locking device 3, the cables 8 are spaced apart to prevent mutual contact and short circuit. The locking device 3 is made of steel-core aluminum stranded wire, which can carry out bidirectional power transmission at the same time.

[0034] See also Figure 4-Figure 5The locking device 3 includes a travel rod 31, which is movably mounted inside the travel pipe 2 in a telescopic manner. A first spring 32 fixedly connected to the travel pipe 2 is fixedly mounted at the bottom of the travel rod 31, an insulating lock buckle 33 for connecting the cable 8 is fixedly mounted on the top of the travel rod 31, and a second spring 35 connected to the connecting base 34 is fixedly mounted at the bottom of the travel rod 31. The travel rod 31 is movably mounted inside the travel pipe 2 in a telescopic manner. A first spring 32 fixedly connected to the travel pipe 2 is fixedly mounted at the bottom of the travel rod 31, so that the locking device 3 as a whole can freely expand and contract inside the travel pipe 2 and is limited by the first spring 32, which makes When the cable 8 fixedly sleeved with the insulating lock buckle 33 becomes too loose, the force acting on the device by the cable 8 can be released by extending and retracting the travel rod 31, thereby ensuring that the equipment used to support the weight of the cable 8 is always an iron tower connected to both ends of the cable 8. In traditional equipment, since the buckle locked with the cable 8 is fixedly connected to the main frame, when the cable 8 bends or becomes tight under the influence of temperature, the force will be transmitted to other cables 8 through the main structure of the equipment, resulting in an increase in the force borne by other cables 8, which makes it easy for the cable 8 to be subjected to excessive stress and a decrease in its service life. The present application document avoids this problem well and improves the stability of the operation of the device.

[0035] See also Figure 4 and Figure 6-Figure 9 The windward device 5 includes a connecting sleeve 51, and a connecting shaft 52 for connecting the connecting pipe 4 is fixedly installed on the top and bottom of the outer surface of the connecting sleeve 51. A connecting channel 53 is arranged on the top of the connecting shaft 52, and the number of the connecting channels 53 is three and they are distributed in parallel. A rotating device 6 is connected to the movable sleeve through a bearing at a position near the tail end of the inner wall of the connecting channel 53.

[0036] See also Figure 4 and Figure 6-Figure 9The rotating device 6 includes a guide tube 61, and a fan blade 62 is arranged on the inner wall of the guide tube 61 near the tail end, and the fan blades 62 are distributed in a circular array. An annular connecting plate 63 is fixedly installed on the outer surface of the guide tube 61 near the tail end, and the annular connecting plate 63 is connected to the tail end of the connecting sleeve 51 through a torque spring 7. The fan blades 62 are arranged on the inner wall of the guide tube 61 near the tail end, and the fan blades 62 are distributed in a circular array. When the wind speed is increased, the airflow can enter the interior of the guide tube 61 and generate torque at the connection with the fan blades 62. The torque is opposite to the torque provided by the torque spring 7 to the rotating device 6. At this time, the rotating device 6 is reset, so that the airflow wound on the outer surface of the guide tube 61 The traction line is released, and under the action of the first spring 32, the locking device 3 as a whole can extend out from the inside of the stroke pipe 2, so that the spacing between the cables 8 is increased, the probability of direct contact between the cables 8 is reduced, and the safety performance is improved. In addition, the greater the wind force, the greater the torque received by the rotating device 6 as a whole, the greater the rotation angle, and the greater the spacing between the cables 8, so that the spacing between the cables 8 is proportional to the wind force, achieving the effect of automatic adjustment and improving the automation of the device. In addition, this adjustment method does not require the cables 8 to be directly fixed with a larger spacing, and the cables 8 will not be subjected to greater stress in the initial state. It is only adjusted to a state of larger spacing when the wind force is strong, which further improves the service life of the cables 8.

[0037] A connecting channel 53 is provided at the top of the connecting shaft 52, and the number of the connecting channels 53 is three and they are distributed in parallel, and a traction rope is provided at the bottom of the connecting base 34, and the traction rope passes through the connecting channel 53 and is connected to the outer surface of the guide tube 61, so that after the windward device 5 rotates as a whole, the traction ropes at the bottom of the connecting base 34 will be entangled with each other and generate a reset torque. When the wind stops, the windward device 5 can be reset as a whole under the action of the reset torque, ensuring that the device can operate normally when the wind blows next time. At the same time, it also avoids the problem of excessive winding of the traction rope at the bottom of the connecting base 34 caused by excessive rotation of the windward device 5, thereby improving the reliability of the device.

[0038] See also Figure 4 and Figure 6-Figure 9The front end opening diameter of the guide tube 61 is larger than the rear end opening diameter, and the cross-sectional shape of the guide tube 61 is a combination of a truncated cone and a cylinder. A connecting shaft 52 for connecting the connecting tube 4 is fixedly installed on the top and bottom of the outer surface of the connecting sleeve 51, so that the windward device 5 and the rotating device 6 can rotate with the axis of the connecting tube 4 as the rotation center, ensuring that the axis of the guide tube 61 can remain parallel to the wind direction, and the front end opening diameter of the guide tube 61 is larger than the rear end opening diameter, so that the airflow can better enter the interior of the guide tube 61, and the flow velocity increases continuously in the process of passing through the guide tube 61, the force on the fan blades 62 is stronger, and the torque generated is greater, ensuring that the cables 8 maintain a larger spacing under strong wind conditions, thereby improving the stability of the operation of the device.

[0039] See also Figure 5-Figure 9 A traction rope is provided at the bottom of the connecting base 34 , and the traction rope passes through the connecting channel 53 and is connected to the outer surface of the guide tube 61 .

[0040] See also Figure 4 and Figure 6-Figure 9 In the initial state, the torque spring 7 provides torque to the rotating device 6 as a whole. Under the action of the torque, the traction rope connected to the bottom of the base 34 is wound around the outer surface of the guide tube 61.

[0041] The method of use of the present invention is as follows:

[0042] During use, when the cable 8 fixed by the insulating lock buckle 33 becomes too loose, the force acting on the device by the cable 8 can be released by the extension and retraction of the travel rod 31, ensuring that the equipment used to support the deadweight of the cable 8 is always the iron tower connected to the two ends of the cable 8. After the wind speed increases, the airflow can enter the interior of the guide tube 61 and connect with the fan blades 62 to generate torque. The torque is opposite to the torque provided by the torque spring 7 to the rotating device 6. At this time, the rotating device 6 is reset, so that the traction line wrapped around the outer surface of the guide tube 61 is released. Under the action of the first spring 32, the locking device 3 as a whole can be extended from the inside of the travel pipe 2, so that the spacing between the cables 8 is increased, reducing the probability of direct contact between the cables 8, and the greater the wind force, the greater the torque received by the rotating device 6 as a whole, and the greater the rotation angle, the greater the line The larger the spacing between the cables 8, the larger the spacing between the cables 8 is, and the spacing between the cables 8 is proportional to the wind force, achieving an automatic adjustment effect. The windward device 5 and the rotating device 6 can rotate with the axis of the connecting tube 4 as the rotation center, ensuring that the axis of the guide tube 61 can remain parallel to the wind direction, and the front end opening diameter of the guide tube 61 is larger than the rear end opening diameter, so that the airflow can better enter the interior of the guide tube 61, and the flow velocity increases continuously in the process of passing through the guide tube 61, the force on the fan blades 62 is stronger, and the torque generated is greater, ensuring that the cables 8 maintain a larger spacing under strong winds. After the windward device 5 rotates as a whole, the traction ropes at the bottom of the connecting base 34 will be entangled with each other and generate a reset torque. When the wind stops, under the action of the reset torque, the windward device 5 can be reset as a whole, ensuring that the device can operate normally when the wind blows next time.

Claims

1. A multi-strand bidirectional parallel power transmission cable, characterized in that: The invention comprises a main frame (1), wherein the outer surface of the main frame (1) is provided with a travel pipe (2), the number of the travel pipes (2) is six, the interior of the travel pipes (2) is movably installed with a locking device (3) in a telescopic manner, the top and bottom of the inner side of the main frame (1) are both fixedly installed with a connecting pipe (4), the bottom of the inner cavity of the connecting pipe (4) is movably sleeved with a windward device (5) through a bearing connection, the interior of the windward device (5) is movably sleeved with a rotating device (6) through a bearing connection, and the tail end of the windward device (5) is fixedly installed with a torque spring (7) for connecting to the rotating device (6); one end of the locking device (3) is fixedly sleeved with a cable (8), the cable (8) adopts a multi-strand parallel bidirectional transmission mode, and the maximum number of strands does not exceed four, and the cables (8) are spaced apart under the action of the locking device (3) to prevent mutual contact and short circuit, and the material used for the locking device (3) is steel core aluminum stranded wire. Bidirectional power transmission can be performed simultaneously; the locking device (3) comprises a travel rod (31), the travel rod (31) is movably mounted inside the travel pipe (2) in a telescopic manner, a first spring (32) fixedly mounted on the bottom of the travel rod (31) for being fixedly connected to the travel pipe (2), an insulating lock buckle (33) for connecting a cable (8) is fixedly mounted on the top of the travel rod (31), and a second spring (35) for connecting to a connecting base (34) is fixedly mounted on the bottom of the travel rod (31); the windward device (5) comprises a connecting sleeve (51), a connecting shaft (52) for connecting to a connecting pipe (4) is fixedly mounted on the top and bottom of the outer surface of the connecting sleeve (51), a connecting channel (53) is arranged on the top of the connecting shaft (52), and the number of the connecting channels (53) is three and they are arranged in parallel, and a rotating device (6) is movably sleeved at a position near the rear end of the inner wall of the connecting channel (53) through a bearing connection.

2. A multi-strand bidirectional parallel power transmission cable according to claim 1, characterized in that: The rotating device (6) comprises a flow guide tube (61), a fan blade (62) is arranged on the inner wall of the flow guide tube (61) near the rear end, and the fan blades (62) are distributed in a circular array. An annular connecting plate (63) is fixedly mounted on the outer surface of the flow guide tube (61) near the rear end, and the annular connecting plate (63) is connected to the rear end of the connecting sleeve (51) via a torque spring (7).

3. A multi-strand bidirectional parallel power transmission cable according to claim 2, characterized in that: The diameter of the front end opening of the flow guide tube (61) is larger than the diameter of the rear end opening, and the cross-sectional shape of the flow guide tube (61) is a combination of a truncated cone and a cylinder.

4. A multi-strand bidirectional parallel power transmission cable according to claim 3, characterized in that: A traction rope is provided at the bottom of the connection base (34), and the traction rope passes through the communication channel (53) and is connected to the outer surface of the flow guide tube (61).

5. A multi-strand bidirectional parallel power transmission cable according to claim 4, characterized in that: The torque spring (7) provides torque to the entire rotating device (6) in the initial state, and under the action of the torque, the traction rope connected to the bottom of the base (34) is wound around the outer surface of the guide tube (61).

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