Cross arm device for temporarily supporting flexible cable

Abstract

The invention discloses a cross arm device for temporary supporting of a flexible cable. The technical problem that in the prior art, a cross arm device for reliably supporting the flexible cable for low-voltage power protection in a transformer area is lacked is solved. The cross arm device for temporary supporting of the flexible cable is used for supporting the flexible cable electrically connected with an outdoor box-type substation and a generator car in a short term and comprises a cross arm mechanism and a cable fixing mechanism, and the two ends of the cross arm mechanism are fixedly connected with telegraph poles on the two sides of the outdoor box-type substation respectively. The cross arm mechanism is located above the outdoor box-type substation, the cable fixing mechanism is borne on the cross arm mechanism and comprises a clamping groove and a clamping block, and the flexible cable extends from an upper pile head of the outdoor box-type substation to the cross arm mechanism. The clamping block and the clamping groove are matched to clamp a flexible cable located between the clamping block and the clamping groove so as to fix the flexible cable to the cable fixing mechanism, and the cross arm mechanism provides supporting force for the cable fixing mechanism and the flexible cable.

Description

Technical Field

[0001] This invention relates to the field of cable support crossarms, and in particular to crossarm devices for temporary support of flexible cables. Background Technology

[0002] As users demand higher reliability of power supply, power grid companies are also placing greater demands on the safe, economical, and stable operation of distribution networks and the provision of high-quality power supply services. Since power outages are unavoidable during distribution network construction, using mobile low-voltage generators to ensure power supply to low-voltage distribution areas becomes the best option.

[0003] The flexible cable connecting the generator truck is plugged into the upper terminal of the prefabricated substation. The cable is only secured to the terminal with bolts, making it susceptible to damage due to factors such as sagging under its own weight, vibration fatigue, and excessive operating angles. Furthermore, the flexible cable supplying power to the distribution area has a large diameter (typically over 50 square millimeters), and due to the design requirements of the prefabricated substation, the upper terminal is at least 2.5 meters above the ground. This results in a significant sag of the flexible cable (greater than 2.5 meters), leading to its substantial weight. Since the upper terminal supports most of the cable's weight, it is prone to deformation during use, potentially causing loose connections or even sparking.

[0004] Therefore, it is essential to develop a crossarm device for temporary support of flexible cables during low-voltage power supply protection in distribution transformer areas, so as to effectively protect the flexible cables and ensure a stable connection between the flexible cables and the prefabricated substation during the power supply protection process. Summary of the Invention

[0005] This invention proposes a crossarm device for temporary support of flexible cables to overcome the shortcomings of the prior art, thereby solving the technical problem of the lack of a crossarm device that can reliably support flexible cables for low-voltage power supply in transformer substations.

[0006] To achieve the above technical objectives, the present invention proposes a crossarm device for temporary support of flexible cables, used to support flexible cables for short-term electrical connections in outdoor box-type substations and generator vehicles, comprising: A crossarm mechanism, whose two ends are fixedly connected to the utility poles on both sides of the outdoor prefabricated substation, and the crossarm mechanism is located above the outdoor prefabricated substation; and, A cable securing mechanism, which is supported on the crossarm mechanism, includes a clamping groove and a clamping block. The flexible cable extends from the upper pile head of the outdoor box-type substation towards the crossarm mechanism. The clamping block and the clamping groove cooperate to clamp the flexible cable located between them to fix the flexible cable to the cable fixing mechanism. The crossarm mechanism provides support force to the cable fixing mechanism and the flexible cable.

[0007] The crossarm device for temporary support of flexible cables proposed in this invention places the crossarm mechanism, which supports the cable fixing mechanism, above the outdoor substation, ensuring a certain insulation distance between the crossarm device and the outdoor substation, thus improving safety. Simultaneously, the crossarm mechanism provides support force to the flexible cable, preventing the cable's own weight from being directly borne by the upper pile head, reducing the probability of damage to the flexible cable joint and the upper pile head. Furthermore, by fixing the flexible cable through the cable fixing mechanism, the flexible cable between the cable fixing mechanism and the upper pile head can be in a stable state of stress balance, and the flexible cable is less prone to swaying, thereby reducing the force between the flexible cable and the upper pile head, further reducing the probability of damage to the flexible cable joint and the upper pile head.

[0008] Preferably, the flexible cable passes over the crossarm mechanism, allowing the crossarm mechanism to temporarily support the flexible cable that is not fixed by the cable fixing mechanism.

[0009] By adopting the aforementioned technical solution, during the connection process between the flexible cable and the upper pile head, the crossarm mechanism serves as a temporary support for the flexible cable, reducing the force that operators need to apply to the flexible cable and alleviating the workload during operation. At the same time, the support of the crossarm mechanism for the flexible cable also reduces the force between the flexible cable and the upper pile head, which greatly reduces the difficulty of connecting the flexible cable and the upper pile head.

[0010] Preferably, the clamping groove and the clamping block are disposed on the side of the crossbar mechanism facing away from the outdoor box-type substation. The clamping groove is configured to extend vertically and has an opening that opens horizontally. The flexible cable has a drooping section that hangs down toward the generator vehicle. Part of the drooping section enters the clamping groove through the opening and is fixed to the cable fixing mechanism.

[0011] Using the aforementioned technical solution, most of the weight of the flexible cable is provided by the drooping section. By configuring the clamping groove to match the drooping section, when the drooping section is fixed to the cable fixing mechanism, the self-weight of the cable in the part of the drooping section below the cable fixing mechanism is transferred from the cable fixing mechanism to the crossarm mechanism and is borne by the crossarm mechanism, thereby reducing the weight of the flexible cable that needs to be supported at the top pile. Secondly, this clamping groove design allows operators to push the flexible cable into the clamping groove without having to lift the flexible cable significantly, greatly reducing the difficulty and labor intensity of the operator's work. Finally, since the clamping groove and clamping block are located on the side of the crossbar mechanism facing away from the outdoor box-type substation, the position where the flexible cable is clamped by the cable fixing mechanism is separated from the upper pile head by a distance in the horizontal direction. This distance allows the flexible cable to have two bends in opposite directions, and these two bends in opposite directions generate opposing torques that can cancel each other out, thereby reducing the torque of the flexible cable at the joint position, and thus reducing the force between the joint and the upper pile head.

[0012] Preferably, the crossarm mechanism includes two main support rods and a crossbar connecting the two main support rods. The two main support rods are fixedly connected to two utility poles. The cable fixing mechanism is installed on the crossbar. The main support rods extend horizontally away from the outdoor box-type substation, so that the cable fixing mechanism is spaced apart from the outdoor box-type substation in the horizontal direction.

[0013] By adopting the aforementioned technical solution, the cable fixing mechanism and the outdoor box-type substation can be further spaced apart in the horizontal direction, which makes it easier to eliminate the torque generated by the bending of the flexible cable between the upper pile head and the cable fixing mechanism, and further reduce the force between the joint and the upper pile head.

[0014] Preferably, the crossbar includes a first crossbar and a second crossbar that are connected by insertion, and a pin. One of the first crossbar and the second crossbar is provided with a plurality of positioning holes, and the other is provided with an insertion hole. The pin passes through the insertion hole and one of the positioning holes, so that the length of the crossbar is adjustable.

[0015] By adopting the aforementioned technical solution, the length of the crossbar is adjustable, enabling the crossbar mechanism to adapt to two utility poles with different spacings, thereby improving the applicability of the crossarm device.

[0016] Preferably, the crossarm mechanism further includes a connecting assembly connecting the main support rod and the crossbar. The connecting assembly includes an openable locking ring and a plug-in. One end of the plug-in is hinged to the locking ring, and the other end is plugged into one end of the crossbar. The locking ring can be locked onto the main support rod, and the plug-in swings horizontally relative to the locking ring.

[0017] By adopting the aforementioned technical solution, the connecting component between the main support rod and the crossbar can, on the one hand, absorb the error caused by the included angle between the two main support rods, allowing the crossbar to be stably connected between the two main support rods; on the other hand, through the cooperation of the locking ring with the main support rod, the locking position of the locking ring on the main support rod is adjustable, making the horizontal distance between the crossbar and the outdoor box-type substation adjustable, thereby making the length of the flexible cable between the upper pile head and the cable fixing mechanism adjustable in the horizontal direction. This section of flexible cable can be adjusted to have a suitable bending angle, further reducing the torque generated by the bending of the flexible cable, and also further reducing the force between the joint of the flexible cable and the upper pile head.

[0018] Preferably, the crossarm mechanism further includes a fixed base, a belt, and a tensioner. The tensioner is installed at one end of the fixed base, and the other end of the fixed base is provided with a connecting rod that is detachably connected to the belt. The tensioner includes a rotating shaft that is fixedly connected to the belt and a ratchet mechanism. The belt passes around the utility pole and connects to the connecting rod. The ratchet mechanism drives the rotating shaft to rotate and tighten the belt and restricts the rotating shaft from rotating in the opposite direction to fix the fixed base to the utility pole. The main support rod is fixedly connected to the fixed base.

[0019] By adopting the aforementioned technical solution, the crossarm mechanism can be easily connected to the utility pole, and it can also be adapted to utility poles of different thicknesses, further improving the versatility of the crossarm device.

[0020] Preferably, the cable fixing mechanism further includes an elbow mechanism consisting of a base, a handle, a connecting rod, and a pressure rod. The pressure rod constitutes the output end of the elbow mechanism, the handle constitutes the input end of the elbow mechanism, the clamping groove is disposed on the base, the base is fixedly connected to the crossarm mechanism, and the pressure rod can move in a first direction toward the clamping groove or in a second direction away from the clamping groove. The toggle mechanism has an unlocked state and a self-locking state. In the unlocked state, the movement of the handle drives the pressure rod to move. In the self-locking state, the pressure rod is locked. The clamping block is adjustablely mounted on the pressure rod, so that the depth to which the clamping block extends into the clamping groove is adjustable.

[0021] By adopting the aforementioned technical solution, by setting an elbow mechanism on the cable fixing mechanism, the clamping block can self-lock when it cooperates with the clamping groove to clamp the flexible cable, thus preventing the cable fixing mechanism from loosening when fixing the flexible cable; secondly, by adjusting the depth of the clamping block extending into the clamping groove, the cable fixing mechanism can adapt to flexible cables of different diameters.

[0022] Preferably, the clamping block has a concave arc surface on the side facing the flexible cable.

[0023] By adopting the aforementioned technical solution, on the one hand, the friction between the clamping block and the flexible cable can be increased, so that the flexible cable can be better fixed to the cable fixing mechanism. On the other hand, it can also avoid the damage to the outer sheath of the flexible cable caused by excessive pressure due to the small contact area between the clamping block and the flexible cable.

[0024] Preferably, the cable fixing mechanism is provided in four groups, and the four groups of cable fixing mechanisms fix three phase cables and one neutral cable respectively.

[0025] Using the aforementioned technical solution, outdoor prefabricated substations typically supply three-phase power to the distribution area. By setting four cable fixing mechanisms, all three phase cables and one neutral cable can be supported by the crossarm device, eliminating the need for multiple crossarm devices and greatly saving costs and manpower.

[0026] These features and advantages of the present invention will be disclosed in detail in the following specific embodiments and accompanying drawings. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the crossarm device in an embodiment of the present invention; Figure 2 This is a schematic diagram of the crossbar and connecting parts in the crossarm mechanism of this invention. Figure 3 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the cable fixing mechanism in an embodiment of the present invention; Figure 5 This is a schematic diagram of the fixed seat, main support rod, belt, tensioner, and connecting parts in the crossarm mechanism of this invention. Figure 6 This is a schematic diagram of the tensioner and belt in an embodiment of the present invention; Figure 7 This is a cross-sectional view of the tensioner in an embodiment of the present invention; Figure 8 This is a schematic diagram of an outdoor prefabricated substation, flexible cables, and crossarm assembly.

[0028] Figure label: 10. Crossarm mechanism; 11. Main support rod; 12. Crossbar; 12a. First crossbar; 12a1. Positioning hole; 12b. Second crossbar; 12b1. Insertion hole; 13. Fixing seat; 13a. Connecting rod; 14. Belt. 20. Cable fixing mechanism; 21. Base; 21a. Clamping groove; 22. Handle; 23. Connecting rod; 23a. Stop block; 24. Pressure rod; 24a. Connecting groove; 25. Clamping block; 25a. Concave arc surface; 6. Adjusting screw; 27. Adjusting nut. 30. Flexible cable; 31. Drooping section; 40. Outdoor prefabricated substation; 100. Connecting component; 110. Locking ring; 111. First locking latch; 112. Second locking latch; 112a. Groove; 113. Locking screw; 114. Lock head; 120. Connector. 200. Wire tensioner; 210. First housing; 211. Baffle; 220. Second housing; 221. First protrusion; 222. Second protrusion; 230. First elastic element; 240. Second elastic element; 250. First pawl; 260. Second pawl; 261. Guide hole; 262. Mating groove; 263. Handle; 270. Shaft; 280. Ratchet; 281. Ratchet tooth; 282. Tooth groove. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be explained and described below with reference to the accompanying drawings. However, the following embodiments are only preferred embodiments of the present invention and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of the present invention.

[0030] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" or "a number" means two or more, unless otherwise expressly defined.

[0032] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0033] like Figures 1 to 8 As shown, this embodiment of the invention proposes a crossarm device for temporary support of flexible cables, used to support the flexible cable 30 of a short-term electrical connection between an outdoor prefabricated substation 40 and a generator vehicle. The crossarm device includes a crossarm mechanism 10 and a cable fixing mechanism 20. The two ends of the crossarm mechanism 10 are respectively fixedly connected to the utility poles on both sides of the outdoor prefabricated substation 40, and the crossarm mechanism 10 is located above the outdoor prefabricated substation 40. The cable fixing mechanism 20 is supported on the crossarm mechanism 10. The cable fixing mechanism 20 includes a clamping groove 21a and a clamping block 25.

[0034] The flexible cable 30 extends from the upper pile head of the outdoor box-type substation 40 toward the crossarm mechanism 10. The clamping block 25 and the clamping groove 21a cooperate to clamp the flexible cable 30 located between them to fix the flexible cable 30 to the cable fixing mechanism 20. The crossarm mechanism 10 provides support force to the cable fixing mechanism 20 and the flexible cable 30.

[0035] It should be noted that the materials of the parts of the crossarm mechanism 10 and the cable fixing mechanism 20 that are in direct contact with the flexible cable 30 (e.g., the groove wall of the clamping groove 21a, the clamping block 25, etc.) must pass at least a 10kV insulation test. Other parts of the crossarm mechanism 10 and the cable fixing mechanism 20 should be insulated as much as possible (e.g., reduce the number of metal components, wrap insulating material around the outside of the metal components, etc.).

[0036] It should be noted that the flexible cable 30 includes an insulating outer sheath and a copper conductor wrapped in the insulating outer sheath. The copper conductor is composed of multiple thin copper cores, allowing the flexible cable 30 to bend and twist to a certain extent. The flexible cable 30 also includes a shielding layer, which wraps around the copper conductor to shield it from electromagnetic interference generated when the copper conductor is energized.

[0037] Of the outdoor prefabricated substation 40, one of the utility poles on both sides is used for the high-voltage side overhead line to enter the substation 40, and the other is used for the low-voltage side overhead line to exit. When the transformer area experiences a power outage, one end of the flexible cable 30 is connected to the upper terminal of the outdoor prefabricated substation 40 along with the low-voltage side overhead line. The upper terminal is the output end of the outdoor prefabricated substation 40, allowing the generator truck to directly supply power to the transformer area.

[0038] Since there are inevitably some metal parts (such as screws, pins, etc.) on the crossarm mechanism 10 and the cable fixing mechanism 20, the crossarm mechanism 10 is located above the outdoor box-type substation 40 so that sufficient insulation distance can be maintained between the two.

[0039] The crossarm device for temporary support of flexible cable 30 proposed in this invention places the crossarm mechanism 10, which supports the cable fixing mechanism 20, above the outdoor substation, so that there is a certain insulation distance between the crossarm device and the outdoor substation, improving safety. At the same time, the crossarm mechanism 10 provides support force to the flexible cable 30, avoiding the direct bearing of the self-weight of the flexible cable 30 by the upper pile head, reducing the probability of damage to the joint of the flexible cable 30 and the upper pile head. Furthermore, by fixing the flexible cable 30 through the cable fixing mechanism 20, the flexible cable 30 can be in a stable state of stress balance between the cable fixing mechanism 20 and the upper pile head, and the flexible cable 30 is not easy to shake, thereby reducing the force between the flexible cable 30 and the upper pile head, further reducing the probability of damage to the joint of the flexible cable 30 and the upper pile head.

[0040] It is understandable that the crossarm mechanism 10 is detachably fixed to the utility pole.

[0041] In this preferred embodiment, such as Figure 8 As shown, the flexible cable 30 passes over the crossarm mechanism 10, so that the crossarm mechanism 10 can temporarily support the flexible cable 30 which is not fixed by the cable fixing mechanism 20.

[0042] After the crossarm mechanism 10 is fixedly connected to the utility pole, the flexible cable 30 is driven around the crossarm mechanism 10 by a crane or a traction rope that passes around the crossarm mechanism 10. The workers working at height connect the terminals of the flexible cable 30 to the upper pile head. At this time, part of the flexible cable 30 is laid on the crossarm mechanism 10, and the crossarm mechanism 10 temporarily supports the flexible cable 30.

[0043] With this configuration, during the connection process between the flexible cable 30 and the upper pile head, the crossarm mechanism 10 serves as a temporary support for the flexible cable 30, reducing the force that the operator needs to apply to the flexible cable 30 and alleviating the workload during operation. At the same time, the support of the crossarm mechanism 10 on the flexible cable 30 also reduces the force between the flexible cable 30 and the upper pile head, greatly reducing the difficulty of connecting the flexible cable 30 and the upper pile head.

[0044] In a more preferred embodiment, such as Figure 1 , Figure 8 As shown, the clamping groove 21a and the clamping block 25 are disposed on the side of the crossarm mechanism 10 facing away from the outdoor box-type substation 40. The clamping groove 21a is configured to extend in the vertical direction and has an opening that opens in the horizontal direction. The flexible cable 30 has a hanging section 31 that hangs down towards the generator vehicle. Part of the hanging section 31 enters the clamping groove 21a through the opening and is fixed to the cable fixing mechanism 20.

[0045] The drooping section 31 of the flexible cable 30 is in a vertical or nearly vertical state. After the flexible cable 30 is connected to the upper pile head, the operator pushes the flexible cable 30 into the clamping groove 21a and fixes it with the clamping block 25. The clamping groove 21a is configured to extend in the vertical direction and has an opening that opens in the horizontal direction so that the clamping groove 21a can fit the drooping section 31 well. The drooping section 31 can also enter the clamping groove 21a more easily and be fixed by the cable fixing mechanism 20.

[0046] Because the upper pile head is set vertically, the joint of the flexible cable 30 needs to be fitted horizontally onto the upper pile head. This results in a large bending angle for the portion of the flexible cable 30 from the joint to the cable fixing mechanism 20. This bending angle causes the flexible cable 30 to generate a large torque, which also acts on the upper pile head, increasing the stress on the upper pile head. Figure 1 , Figure 8 As shown, since the clamping groove 21a and the clamping block 25 are located on the side of the crossarm mechanism 10 facing away from the outdoor box-type substation 40, the position where the flexible cable 30 is clamped by the cable fixing mechanism 20 is separated from the upper pile head by a distance in the horizontal direction. This distance allows the flexible cable 30 to have two bends in opposite directions. These two bends in opposite directions generate torques in opposite directions that can cancel each other out.

[0047] The weight of the flexible cable 30 is mostly provided by the drop section 31. By configuring the clamping groove 21a to fit the drop section 31, when the drop section 31 is fixed to the cable fixing mechanism 20, the weight of the cable in the part of the drop section 31 below the cable fixing mechanism 20 is transferred from the cable fixing mechanism 20 to the crossarm mechanism 10 and is borne by the crossarm mechanism 10, thereby reducing the weight of the flexible cable 30 that needs to be supported by the upper pile head. Secondly, the way the clamping groove 21a is set up allows the operator to push the flexible cable 30 into the clamping groove 21a without having to lift the flexible cable 30 significantly, which greatly reduces the difficulty of operation and the labor intensity of the operator. Finally, since the clamping groove 21a and the clamping block 25 are located on the side of the crossarm mechanism 10 facing away from the outdoor box-type substation 40, the position where the flexible cable 30 is clamped by the cable fixing mechanism 20 is separated from the upper pile head by a distance in the horizontal direction. This distance allows the flexible cable 30 to have two bends in opposite directions, and these two bends in opposite directions generate opposing torques that can cancel each other out, thereby reducing the torque of the flexible cable 30 at the joint position, and thus reducing the force between the joint and the upper pile head.

[0048] In another preferred embodiment, the clamping block 25 has a concave arc surface 25a on the side facing the flexible cable 30.

[0049] The concave arc surface 25a is used to crimp the flexible cable 30 and increase the contact area between the clamping block 25 and the flexible cable 30.

[0050] This configuration serves two purposes: firstly, it increases the friction between the clamping block 25 and the flexible cable 30, allowing the flexible cable 30 to be better fixed to the cable fixing mechanism 20; secondly, it prevents damage to the outer sheath of the flexible cable 30 due to excessive pressure caused by the small contact area between the clamping block 25 and the flexible cable 30.

[0051] In another preferred embodiment, the cable fixing mechanism 20 is provided in four sets, and the four sets of cable fixing mechanisms 20 respectively fix three phase cables and one neutral cable.

[0052] The three phase cables and the neutral cable are respectively connected to the four upper terminals of the outdoor box-type substation 40.

[0053] Outdoor box-type substation 40 typically supplies three-phase power to the distribution area. By setting four cable fixing mechanisms 20, all three phase cables and one neutral cable can be supported by the crossarm device, eliminating the need to install multiple crossarm devices and greatly saving costs and manpower.

[0054] Based on the foregoing embodiments, such as Figures 1 to 3 , Figure 5 As shown, in this embodiment, the crossarm mechanism 10 includes two main support rods 11 and a crossbar 12 connected between the two main support rods 11. The two main support rods 11 are fixedly connected to two utility poles. The cable fixing mechanism 20 is installed on the crossbar 12. The main support rods 11 extend horizontally in the direction away from the outdoor box-type substation 40 so that the cable fixing mechanism 20 is spaced apart from the outdoor box-type substation 40 in the horizontal direction.

[0055] The main support rod 11 extends in a direction perpendicular or approximately perpendicular to the plane in which the two utility poles are located, such that the main support rod 11 extends horizontally in a direction away from the outdoor box-type substation 40.

[0056] This arrangement allows for a further horizontal separation between the cable fixing mechanism 20 and the outdoor box-type substation 40, making it easier to eliminate the torque generated by the bending of the flexible cable 30 between the upper pile head and the cable fixing mechanism 20, and further reducing the force between the joint and the upper pile head.

[0057] Understandably, the crossarm mechanism 10 is installed as horizontally as possible so that the two main support rods 11 are subjected to force more evenly, thereby improving the support stability of the two main support rods 11 on the crossarm mechanism 10.

[0058] It should be noted that, in order to ensure that the crossarm mechanism 10 is horizontal, when fixing the two main support rods 11, it is necessary to make the two main support rods 11 as close as possible to the same horizontal plane.

[0059] In a preferred embodiment, such as Figure 2 , Figure 3 As shown, the crossbar 12 includes a first crossbar 12a and a second crossbar 12b that are connected by insertion, as well as a pin. One of the first crossbar 12a and the second crossbar 12b is provided with a plurality of positioning holes 12a1, and the other is provided with an insertion hole 12b1. The pin passes through the insertion hole 12b1 and one of the positioning holes 12a1, so that the length of the crossbar 12 is adjustable.

[0060] The length of the crossbar 12 is adjustable, which allows the crossarm mechanism 10 to be adapted to two utility poles with different spacing, thus improving the applicability of the crossarm device.

[0061] In another preferred embodiment, such as 1 to Figure 3 , Figure 5 As shown, the crossarm mechanism 10 also includes a connecting assembly 100 connected between the main support rod 11 and the crossbar 12. The connecting assembly 100 includes an openable locking ring 110 and a plug 120. One end of the plug 120 is hinged to the locking ring 110, and the other end is plugged into one end of the crossbar 12. The locking ring 110 can be locked onto the main support rod 11, and the plug 120 swings horizontally relative to the locking ring 110.

[0062] The locking ring 110 includes a first locking buckle 111, a second locking buckle 112, a locking screw 113, and a locking head 114. One end of the first locking buckle 111 is rotatably connected to one end of the second locking buckle 112. The first locking buckle 111 and the second locking buckle 112 have arc-shaped inner walls, forming a ring. One end of the locking screw 113 is rotatably connected to the other end of the first locking buckle 111. The other end of the second locking buckle 112 has a slot 112a for the locking screw 113 to pass through. The locking head 114 is screwed to the locking screw 113, and the distance between the locking head 114 and the first locking buckle 111 is changed by rotation. The locking screw 113 passes through the second locking buckle 112 and presses the second locking buckle 112 with the locking head 114, so that the first locking buckle 111 and the second locking buckle 112 lock the main support rod 11.

[0063] The distance between the two utility poles is fixed, but it is not possible to ensure that the two main support poles 11 are parallel to each other during the installation process. The error caused by this is absorbed by the horizontal swing of the connector 120 relative to the locking ring 110.

[0064] By connecting the main support rod 11 and the crossbar 12 with the connecting assembly 100, on the one hand, the error caused by the included angle between the two main support rods 11 can be absorbed, so that the crossbar 12 can be stably connected between the two main support rods 11; on the other hand, by cooperating with the main support rod 11, the locking position of the locking ring 110 on the main support rod 11 is adjustable, so that the horizontal distance between the crossbar 12 and the outdoor box-type substation 40 is adjustable, thereby making the length of the flexible cable 30 between the upper pile head and the cable fixing mechanism 20 adjustable in the horizontal direction. This section of flexible cable 30 can be adjusted to have a suitable bending angle, further reducing the torque generated by the bending of the flexible cable 30, and also further reducing the force between the joint of the flexible cable 30 and the upper pile head.

[0065] In another preferred embodiment, such as Figures 5 to 7 As shown, the crossarm mechanism 10 also includes a fixed base 13, a belt 14, and a tensioner 200. The tensioner 200 is installed at one end of the fixed base 13, and the other end of the fixed base 13 is provided with a connecting rod 13a that is detachably connected to the belt 14. The tensioner 200 includes a rotating shaft 270 that is fixedly connected to the belt 14 and a ratchet mechanism. The belt 14 passes around the utility pole and connects to the connecting rod 13a. The ratchet mechanism 280 drives the rotating shaft 270 to rotate and tighten the belt 14 and restricts the rotating shaft 270 to rotate in the opposite direction, thereby fixing the fixed base 13 to the utility pole. The main support rod 11 is fixedly connected to the fixed base 13.

[0066] In this embodiment, the belt 14 is provided with a hook 14a that engages with the connecting rod 13a.

[0067] In this embodiment, the tensioner 200 further includes a first housing 210, a second housing 220, a first elastic element 230, and a second elastic element 240. The ratchet 280 mechanism includes a ratchet 280 fixedly connected to the rotating shaft 270, a first pawl 250, and a second pawl 260. One end of the first housing 210 is rotatably connected to the fixed seat 13, and the other end of the first housing 210 is rotatably connected to the rotating shaft 270. The second housing 220 is rotatably connected to the first housing 210 via the rotating shaft 270. The ratchet 280 is provided with a plurality of ratchet teeth 281, and a tooth groove 282 is formed between adjacent ratchet teeth 281.

[0068] The first housing 210 is provided with a baffle 211. The first pawl 250 is radially slidably mounted on the first housing 210 relative to the ratchet 280 and located between the baffle 211 and the ratchet 280. The first elastic member 230 is supported between the baffle 211 and the first ratchet 280 and presses the first pawl 250 into the tooth groove 282.

[0069] The second pawl 260 is radially slidably mounted on the second housing 220 relative to the ratchet 280. The second pawl 260 is provided with a guide hole 261 and a mating groove 262. One end of the second elastic member 240 passes through the second housing 220 and the guide hole 261 in sequence and is placed in the mating groove 262. The elastic force of the second elastic member 240 presses the second pawl 260 into another tooth groove 282 on the ratchet 280.

[0070] The ratchet 280 mechanism has a locked position and an unlocked position. The second housing 220 has a first protrusion 221 and a second protrusion 222 corresponding to the locked and unlocked positions. When the ratchet 280 is locked, the first protrusion 221 stops the first pawl 250 near the first elastic member 230, preventing the first pawl 250 from moving radially along the ratchet 280, thus locking the ratchet 280 mechanism. When the ratchet 280 is unlocked, the second protrusion 222 pushes the first pawl 250 in a direction away from the ratchet 280, causing the first pawl 250 to disengage from the tooth groove 282. The end of the second pawl 260 away from the ratchet 280 has a handle 263. Pulling the handle 263 causes the second pawl 260 to disengage from the tooth groove 282, thus unlocking the ratchet 280 mechanism. When the ratchet 280 mechanism moves from the locked position to the unlocked position, the first protrusion 221 disengages from the stop position of the first pawl 250. Under the action of the ratchet 281, the first pawl 250 moves away from the ratchet 280 and releases the lock on the ratchet 280. The ratchet 280 rotates and tightens the belt 14 under the drive of the second pawl 260.

[0071] The above-mentioned configuration allows the crossarm mechanism 10 to be easily connected to the utility pole, and also enables the crossarm mechanism 10 to be adapted to utility poles of different thicknesses, further improving the versatility of the crossarm device.

[0072] Based on all the aforementioned embodiments, such as Figure 4 As shown, in this embodiment, the cable fixing mechanism 20 is an elbow mechanism composed of a base 21, a handle 22, a connecting rod 23, and a pressure rod 24. The pressure rod 24 constitutes the output end of the cable fixing mechanism 20, and the handle 22 constitutes the input end of the cable fixing mechanism 20. The clamping groove 21a is disposed on the base 21, and the base 21 is fixedly connected to the crossarm mechanism 10. The pressure rod 24 can move in a first direction toward the clamping groove 21a or in a second direction away from the clamping groove 21a. The cable fixing mechanism 20 has an unlocked state and a self-locking state. In the unlocked state, the movement of the handle 22 drives the pressure rod 24 to move. In the self-locking state, the pressure rod 24 is locked. The clamping block 25 is adjustablely mounted on the pressure rod 24 so that when the cable fixing mechanism 20 is in the self-locking state, the clamping block 25 presses the flexible cable 30 into the clamping groove 21a.

[0073] The pressure rod 24 and handle 22 are rotatably connected to two rotating connection points of the base 21, and the two ends of the connecting rod 23 are rotatably connected to the pressure rod 24 and handle 22, forming a four-bar linkage mechanism consisting of the base 21, handle 22, connecting rod 23, and pressure rod 24. The cable fixing mechanism 20 has a dead point position and self-locks to lock the pressure rod 24 when the mechanism moves to the dead point position.

[0074] In this embodiment, the dead position of the cable fixing mechanism 20 is when the connecting rod 23 and the pressure rod 24 are perpendicular and the connecting rod 23 and the handle 22 are on the same plane. At this time, the reaction force of the flexible cable 30 on the pressure rod 24 is transmitted vertically to the handle 22. This force will not cause the handle 22 to move, thereby locking the pressure rod 24. The connecting rod 23 is also provided with a stop block 23a. When the handle 22 moves to the dead position of the cable fixing mechanism 20, the stop block 23a stops the pressure rod 24 and restricts the pressure rod 24 from continuing to move, thereby keeping the cable fixing mechanism 20 in a self-locking state.

[0075] The pressure rod 24 is provided with a connecting groove 24a. The cable fixing mechanism 20 also includes an adjusting screw 26 and a pair of adjusting screws 27. One end of the adjusting screw 26 passes through the connecting groove 24a and is connected to the clamping block 25. The two adjusting screws 27 are respectively located on both sides of the connecting groove 24a, so that the length of the adjusting screw 26 passing through the connecting groove 24a is adjustable, thereby adjusting the depth of the clamping block 25 extending into the clamping groove 21a to adapt to flexible cables 30 with different diameters.

[0076] The base 21 includes an upper base and a lower base. The upper base and the lower base close together to clamp the crossbar mechanism 10, thereby fixing the base 21 onto the crossbar mechanism 10.

[0077] By setting the cable fixing mechanism 20 on the cable fixing mechanism 20, the clamping block 25 can self-lock when it cooperates with the clamping groove 21a to clamp the flexible cable 30, thus preventing the cable fixing mechanism 20 from loosening when fixing the flexible cable 30; secondly, by adjusting the depth of the clamping block 25 into the clamping groove 21a, the cable fixing mechanism 20 can be adapted to flexible cables 30 with different cable diameters.

[0078] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes, but is not limited to, the contents described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of the present invention will be included within the scope of the claims.

Claims

1. A crossarm device for temporary support of flexible cables, used to support flexible cables for short-term electrical connections in outdoor box-type substations and generator vehicles, characterized in that, include: A crossarm mechanism is fixedly connected at both ends to the utility poles on both sides of the outdoor prefabricated substation, and the crossarm mechanism is located above the outdoor prefabricated substation. as well as, A cable securing mechanism, which is supported on the crossarm mechanism, includes a clamping groove and a clamping block. The flexible cable extends from the upper pile head of the outdoor box-type substation towards the crossarm mechanism. The clamping block and the clamping groove cooperate to clamp the flexible cable located between them to fix the flexible cable to the cable fixing mechanism. The crossarm mechanism provides support force to the cable fixing mechanism and the flexible cable.

2. The crossarm device as described in claim 1, characterized in that, The flexible cable passes over the crossarm mechanism, allowing the crossarm mechanism to temporarily support the flexible cable that is not fixed by the cable fixing mechanism.

3. The crossarm device as described in claim 2, characterized in that, The clamping groove and the clamping block are disposed on the side of the crossbar mechanism facing away from the outdoor box-type substation. The clamping groove is configured to extend vertically and has an opening that opens horizontally. The flexible cable has a drooping section that hangs down toward the generator vehicle. Part of the drooping section enters the clamping groove through the opening and is fixed to the cable fixing mechanism.

4. The crossarm device as described in claim 1, characterized in that, The crossarm mechanism includes two main support rods and a crossbar connecting the two main support rods. The two main support rods are fixedly connected to two utility poles. The cable fixing mechanism is installed on the crossbar. The main support rods extend horizontally away from the outdoor box-type substation, so that the cable fixing mechanism is spaced apart from the outdoor box-type substation in the horizontal direction.

5. The crossarm device as described in claim 4, characterized in that, The crossbar includes a first crossbar and a second crossbar that are connected by insertion, and a pin. One of the first crossbar and the second crossbar is provided with a plurality of positioning holes, and the other is provided with an insertion hole. The pin passes through the insertion hole and one of the positioning holes, so that the length of the crossbar is adjustable.

6. The crossarm device as described in claim 4, characterized in that, The crossarm mechanism further includes a connecting assembly connecting the main support rod and the crossbar. The connecting assembly includes an openable locking ring and a plug-in. One end of the plug-in is hinged to the locking ring, and the other end is plugged into one end of the crossbar. The locking ring can be locked onto the main support rod, and the plug-in swings horizontally relative to the locking ring.

7. The crossarm device as described in claim 4, characterized in that, The crossarm mechanism also includes a fixed base, a belt, and a tensioner. The tensioner is installed at one end of the fixed base, and the other end of the fixed base is provided with a connecting rod that is detachably connected to the belt. The tensioner includes a rotating shaft that is fixedly connected to the belt and a ratchet mechanism. The belt passes around the utility pole and connects to the connecting rod. The ratchet mechanism drives the rotating shaft to rotate and tighten the belt and restricts the rotating shaft from rotating in the opposite direction to fix the fixed base to the utility pole. The main support rod is fixedly connected to the fixed base.

8. The crossarm device as described in claim 1, characterized in that, The cable fixing mechanism is an elbow mechanism consisting of a base, a handle, a connecting rod, and a pressure rod. The pressure rod constitutes the output end of the cable fixing mechanism, and the handle constitutes the input end. The clamping groove is disposed on the base, and the base is fixedly connected to the crossarm mechanism. The pressure rod can move in a first direction toward the clamping groove or in a second direction away from the clamping groove. The cable fixing mechanism has an unlocked state and a self-locking state. In the unlocked state, the movement of the handle drives the pressure rod to move. In the self-locking state, the pressure rod is locked. The clamping block is adjustablely mounted on the pressure rod, so that the depth to which the clamping block extends into the clamping groove is adjustable.

9. The crossarm device as described in claim 1, characterized in that, The clamping block has a concave arc surface on the side facing the flexible cable.

10. The crossarm device as described in claim 1, characterized in that, The cable fixing mechanism is provided in four groups, and the four groups of cable fixing mechanisms fix three phase cables and one neutral cable respectively.

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