Vehicle-mounted folding arm type network blocking device for spanning construction of overhead line of distribution network

Abstract

The invention relates to a vehicle-mounted folding arm type network blocking device for distribution network overhead line crossing construction, and belongs to the technical field of electric power line construction crossing frames. The device is composed of a blocking net main arm, a cavel unfolding device, a pitching and rotating mechanism and a connecting base. A plurality of rolling shafts are arranged on the net blocking main arm, resistance during wire traction can be effectively reduced, the net blocking device is small in size and light in weight, the net blocking device is connected with a crane through an adjustable base, the net blocking device is suitable for various hoisting equipment such as spider cranes, crawler cranes and small-tonnage automobile cranes, and the net blocking device can be used in narrow spaces, farmlands or mountain forest zones. Transportation is convenient, and multiple transportation devices and on-site secondary assembly are not needed. And during construction, the crane can be parked in place for construction, so that the crane can be stopped at any time when walking and used at any time when rising, aerial work and near live-line work of personnel are not needed, and the safety is high. The problem that the structural form, transportation portability, construction efficiency and the like of an existing mobile crossing frame cannot completely meet the operation requirements of a distribution line is solved.

Description

Technical Field

[0001] This invention relates to a vehicle-mounted folding arm type netting device for overhead power line crossing construction, belonging to the field of power line crossing construction technology. Background Technology

[0002] With the development of the national economy, the integration of new energy vehicles, the growth of electricity load, and the increasing expectations of users, the power distribution network is undergoing continuous optimization and upgrading, transforming from the traditional "passive power supply" model to a modern power distribution network that is "active, intelligent, efficient, reliable, and green." Power line crossing construction is a crucial link in the construction and renovation of power facilities. In power line construction scenarios, the construction lines are 0.4kV-10kV lines, and the objects being crossed are often communication fiber optic cables, self-built ropes by residents, photovoltaic feeders, low-voltage lines, etc., with the line height mostly around 12 meters. To prevent guide ropes or conductors from accidentally falling onto the objects being crossed during construction, traditional crossing construction methods usually require a protective netting support above the crossed facilities. However, through our research on the on-site construction of traditional crossing methods, we have found that power line crossing construction faces two major core challenges.

[0003] First, the construction site environment is complex: construction sites are often located in narrow alleys, dense residential areas, rural roads, farmland or mountainous areas, where large machinery and large crossing frames are difficult to enter. In many cases, it is necessary to rely on manpower to transport materials and erect traditional crossing frames, which not only takes a long time, but also poses great safety hazards during the construction process.

[0004] Second, there is a strong demand for uninterrupted power supply: power outages affect residents' lives, shops' operations, and small factories' production, resulting in a high rate of user complaints. Therefore, power companies are pushing for live-line construction, which leads to a surge in safety risks.

[0005] The existing mobile crossing frames cannot fully meet the operational requirements of the aforementioned power distribution lines in terms of structural form, economic cost, transportation portability, and construction efficiency. Therefore, it is necessary to develop a new type of mobile crossing frame to meet the construction requirements of the aforementioned power distribution lines. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of the prior art by providing a mobile crossing frame with a horn-turning device and multiple rollers on the main arm of the netting device. This effectively expands the protection range of the netting device and reduces the resistance during conductor traction. The device is small in size and lightweight, allowing the crane to carry the crossing frame along with it, eliminating the need for multiple transport devices and on-site secondary assembly, thus facilitating convenient and quick construction. Connected to the crane boom via a base, it is compatible with various small cranes and can meet the needs of use in confined spaces, farmland, or mountainous areas for overhead power line crossing construction.

[0007] The present invention achieves the above objectives through the following technical solution: A vehicle-mounted folding arm type netting device for overhead power line crossing construction, comprising a netting main arm, a horn-turning device, a pitching and rotating mechanism, and a connecting base, characterized in that: one end of the netting main arm is equipped with a pitching and rotating mechanism, and a connecting base is mounted on the pitching and rotating mechanism; the netting main arm is connected to the front end of a crane boom through the connecting base; and horn-turning devices are symmetrically arranged on both sides of the length direction of the netting main arm.

[0008] The main arm of the sealing net consists of a main beam, wing beams and rollers. The wing beams are evenly distributed on both sides of the main beam and are perpendicular to the main beam. Rollers are installed on the top of the wing beams.

[0009] The horn-turning device consists of a horn-turning mechanism, a horn-turning mechanism connecting rod, an electric push rod, and an electric push rod pin. The horn-turning mechanism is bolted to the end of the wing beam, and the horn-turning mechanism connecting rod is connected to the horn-turning mechanism. One end of the electric push rod is mounted on the horn-turning mechanism on the wing beam at the end of the main arm of the sealing net via an electric push rod pin; the other end of the electric push rod is connected to the horn-turning mechanism connecting rod via an electric push rod pin. The horn-turning mechanism consists of a horn rod, a horn-turning base, a horn-turning pin, a sliding fork, and a fork pin. The horn rod is hinged to the horn-turning base via the horn-turning pin, and the fork pin hinges the sliding fork and the groove at the bottom of the horn rod within the groove of the horn-turning base.

[0010] The pitch and rotation mechanism consists of a pitch base, a rotation support, a pitch mechanism, a rotary table reducer, and a rotation drive module. The pitch base has an upper lug and a lower lug on one side. The upper lug at the top of the pitch base is hinged to the long lug of the rotation support via a connecting pin. The lower lug at the bottom of the pitch base is hinged to one end of the pitch mechanism via a connecting pin, and the other end of the pitch mechanism is hinged to the short lug of the rotation support via a connecting pin. The rotary table reducer and the rotation drive module are mounted on the top of the rotation support.

[0011] The pitch mechanism consists of two horizontal connecting rods, four movable connecting rods, a T-shaped lead screw assembly, a lead screw nut, a lead screw drive module, and a connecting shaft. The T-shaped lead screw assembly is equipped with four movable connecting rods via the lead screw nut. Each pair of movable connecting rods is connected to a horizontal connecting rod via a connecting rod pin. The two horizontal connecting rods and the four movable connecting rods form a hexagonal structure symmetrical to the T-shaped lead screw assembly. The lead screw drive module and the connecting shaft are mounted on one end of the T-shaped lead screw assembly.

[0012] The T-shaped lead screw assembly consists of a T-shaped lead screw, a lead screw sleeve, two bearing seats, two thrust bearings, a bearing pressure plate, a bushing, and a locking nut. Two bearing seats are spaced apart on one end of the T-shaped lead screw driven by the lead screw module. The two bearing seats respectively contain a thrust bearing and a bearing pressure plate, and are locked by a locking nut. A bushing and a lead screw sleeve are installed on the T-shaped lead screw between the two bearing seats.

[0013] The lead screw drive module consists of a pitch drive motor and a pitch planetary reducer. The pitch drive motor is connected to the T-type lead screw assembly through the pitch planetary reducer and a connecting shaft.

[0014] The connecting base consists of a first spacing adjustment connecting seat, a second spacing adjustment connecting seat, a third spacing adjustment connecting seat, a fourth spacing adjustment connecting seat, and a connecting base plate. The first and second spacing adjustment connecting seats are symmetrically installed on the upper end of the connecting base plate, and the third and fourth spacing adjustment connecting seats are symmetrically installed on the lower end of the connecting base plate. Each of the first, second, third, and fourth spacing adjustment connecting seats is provided with an adjustment mechanism, which adjusts the spacing between the four connecting seats.

[0015] The first and second spacing adjustment connecting seats are symmetrical and identical in structure, with the first spacing adjustment connecting seat being described in the following description. The first spacing adjustment connecting seat consists of an upper support leg, an upper support leg seat, a support leg pin, an upper support leg pull rod, an upper support leg pull rod pin, an upper support leg T-shaped adjusting screw, an upper support leg screw forward rotation nut, a limiting ear plate, and an upper support leg screw limit nut. The upper support leg T-shaped adjusting screw is mounted on the limiting ear plate and secured by the upper support leg screw limit nut. One end of the upper support leg T-shaped adjusting screw is connected to the upper support leg screw forward rotation nut. The upper support leg seat is fixed to the upper end of the connecting seat base plate by bolts. The upper support leg is hinged to the upper support leg seat via the support leg pin. The upper support leg screw forward rotation nut is installed in the sliding groove of the upper support leg seat. One end of the upper support leg pull rod is connected to the upper support leg via the upper support leg pull rod pin, and the other end is connected to the upper support leg screw forward rotation nut.

[0016] The third and fourth spacing adjustment connecting seats are symmetrical and identical in structure, and the third spacing adjustment connecting seat will be described in the following description. The third spacing adjustment connecting seat consists of a lower left support leg, a lower left support leg seat, a support leg pin, a lower support leg T-shaped adjusting screw, a lower support leg screw nut, a lower support leg screw sleeve, and a lower support leg screw limiting nut. The lower left support leg seat is connected to the lower end of the connecting seat base plate by bolts and can slide up and down through the sliding groove on the lower left support leg seat. The lower left support leg is hinged to the lower left support leg seat by the support leg pin. The lower support leg screw sleeve is installed on the lower left support leg. The lower support leg T-shaped adjusting screw is fitted inside the lower support leg screw sleeve and secured by the lower support leg screw limiting nut. The lower support leg screw nut is installed on the lower left support leg seat, and the lower support leg T-shaped adjusting screw is installed inside the lower support leg screw nut.

[0017] The pitch base has multiple connection holes and is fixedly connected to the base plate of the connecting seat by bolts.

[0018] The advantages of this invention compared to the prior art are as follows: This mobile folding boom crossing frame, used for overhead power line crossing construction, features multiple rollers on its main boom to effectively reduce resistance during conductor traction. It is small in size and lightweight, and connects to the crane via an adjustable base, making it compatible with various types of lifting equipment such as spider cranes, crawler cranes, and small-tonnage truck cranes. It can be used in confined spaces, farmland, or mountainous areas. Transportation is convenient; it can be transported to the site along with the crane, eliminating the need for multiple transport devices and on-site reassembly. Construction is quick and easy; the crane can be parked in position for immediate operation, allowing for convenient movement and use without personnel working at height or near live electrical lines, ensuring high safety. Attached Figure Description

[0019] Figure 1 A frontal view of a mobile folding boom crossing frame used for overhead power line crossing construction, mounted on a crane boom for transportation. Figure 2 A three-dimensional schematic diagram of a mobile folding arm crossing frame used for overhead power line crossing construction, installed on a crane boom for transportation. Figure 3 This is a schematic diagram of the construction status of a mobile folding arm crossing frame used for overhead power line crossing construction. Figure 4 This is a schematic diagram of the main structure of a mobile folding arm gantry; Figure 5 This is a top view of the mobile folding arm gantry. Figure 6 This is a side view of the mobile folding arm gantry. Figure 7A three-dimensional structural diagram of a mobile folding arm gantry; Figure 8 A three-dimensional structural diagram of the ram's horn flipping device mounted on a mobile folding arm crossover frame; Figure 9 for Figure 8 Enlarged view of point A; Figure 10 A three-dimensional structural diagram of the ram's horn-flipping device; Figure 11 This is a left-side three-dimensional structural diagram of the pitch and rotation mechanism; Figure 12 This is a front-view three-dimensional structural diagram of the pitch and rotation mechanism; Figure 13 This is a top-view three-dimensional structural diagram of the pitch and rotation mechanism; Figure 14 This is a side view of the three-dimensional structure of the pitch and rotation mechanism; Figure 15 This is a right-view three-dimensional structural diagram of the pitch and rotation mechanism; Figure 16 This is a schematic diagram of the main structure of the pitch mechanism; Figure 17 This is a top-view sectional structural diagram of the pitch mechanism; Figure 18 This is a three-dimensional structural diagram of the pitch mechanism; Figure 19 A schematic diagram of the structure for adjusting the connecting base; Figure 20 This is a schematic diagram of the structure of the first pitch adjustment connector; Figure 21 This is a schematic diagram of the main structure of the third spacing adjustment connector; Figure 22 A three-dimensional structural diagram of the third spacing adjustment connector; Figure 23 This is a three-dimensional structural diagram of the tilting base.

[0020] In the diagram: 1. Main arm of the sealing net; 101. Main beam; 102. Wing beam; 103. Roller; 2. Horn-turning device; 201. Horn-turning mechanism; 20101. Horn rod; 20102. Horn-turning base; 20103. Horn-turning pin; 20104. Sliding fork; 20105. Fork pin. 202. Horn-turning mechanism connecting rod; 203. Electric push rod; 204. Electric push rod pin; 3. Pitch and rotation mechanism, 301. Pitch base; 30101. Upper ear seat; 30102. Lower ear seat; 302. Rotation support; 30201. Long ear seat; 30202. Short ear seat; 303. Rotation support connecting pin; 304. Pitch mechanism; 30401. Horizontal connecting rod; 30402. Movable connecting rod; 30403. Connecting rod pin; 30404. T-type lead screw assembly. 3040401, T-type lead screw; 3040402, lead screw sleeve; 3040403, bearing housing; 3040404, thrust bearing; 3040405, bearing pressure plate; 3040406, bushing; 3040407, lock nut; 30405, lead screw nut; 30406, lead screw drive module; 3040601, pitch drive motor; 3040602, pitch planetary reducer; 30407, connecting shaft; 305, pitch mechanism connecting pin; 306. Rotary turntable reducer, 307. Rotary drive module; 4. Connecting base, 401. First spacing adjustment connecting seat, 40101. Upper support leg, 40102. Upper support leg seat, 40103. Support leg pin, 40104. Upper support leg pull rod, 40105. Upper support leg pull rod pin, 40106. Upper support leg T-type adjusting screw, 40107. Upper support leg screw forward rotation nut, 40108. Limiting ear plate, 40109. Upper support leg screw limiting nut, 402. Second spacing adjustment connecting seat 40201. Upper outrigger screw reverse nut; 403. Third spacing adjustment connector; 40301. Lower left outrigger; 40302. Lower left outrigger seat; 40303. Outrigger pin; 40304. Lower outrigger T-shaped adjusting screw; 40305. Lower outrigger screw nut; 40306. Lower outrigger screw sleeve; 40307. Lower outrigger screw limit nut; 404. Fourth spacing adjustment connector; 405. Connecting seat base plate; 5. Crane boom; 6. Object being crossed; 7. Construction line. Detailed Implementation

[0021] The following is in conjunction with the instruction manual appendix. Figure 1-23 The technical solution of the present invention will be further described in detail below: like Figure 1-3As shown, the mobile folding arm crossing frame used for overhead power line crossing construction consists of a main shielding arm 1, a horn-turning device 2, a pitching and rotating mechanism 3, and a connecting base 4. The main shielding arm 1 is located at the top of the crossing frame. One end of the main shielding arm 1 is equipped with the pitching and rotating mechanism 3, and the connecting base 4 is mounted on the pitching and rotating mechanism 3. The main shielding arm 1 is connected to the front end of the crane boom 5 through the connecting base 4. The horn-turning devices 2 are symmetrically arranged on both sides of the main shielding arm 1 along its length. The main function of this mobile folding arm crossing frame used for overhead power line crossing construction is to place it above the object being crossed 6 to provide protection and prevent the construction line 7 from falling directly onto the object being crossed 6. During transportation, the mobile folding boom crossing frame used for overhead power line crossing construction is installed at the front end of the crane boom 5 via the connecting base 4. The horn-turning device 2 lowers the horns, and the pitching and rotating mechanism 3 rotates and folds the main boom 1 of the crossing frame above the crane boom 5, minimizing the overall dimensions of the crossing frame and its height when stacked with the crane, making it convenient for the crane to carry the crossing frame to the site. During construction, the crane is parked in the designated position, the grounding support is completed, and the crossing frame is unfolded and placed at the crossing point for construction to begin. It allows for easy movement and use, is convenient to erect, and is highly safe.

[0022] Furthermore, the main arm 1 of the sealing net consists of a main beam 101 located in the middle, eight wing beams 102 located on both sides of the main beam, and four rollers 103 above the wing beams (see Appendix). Figure 4-7 The wing beams 102 are evenly distributed on both sides of the main beam 101 and are perpendicular to the main beam 101. They are made of welded steel sections, which are simple to manufacture and have high strength. Rollers 103 are installed on the top of the wing beams 102. The rollers 103 can significantly reduce the resistance when the construction line 7 is pulled through, and prevent the construction line 7 from being cut or damaged when it passes through.

[0023] Furthermore, the horn-turning device 2 is installed on both sides of the sealing net main arm 1 along the length of the sealing net, arranged symmetrically from left to right. The horn-turning device 2 consists of a horn-turning mechanism 201, a horn-turning mechanism connecting rod 202, an electric push rod 203, and an electric push rod pin 204 (see Appendix). Figure 8-10The horn-turning mechanism 201 is bolted to the end of the wing beam 102. The horn-turning mechanism connecting rod 202 connects each horn-turning mechanism 201, enabling the horn-turning mechanism 201 on one side to move together. One end of the electric push rod 203 is mounted on the horn-turning mechanism 201 of the wing beam 102 at the end of the main arm 1 of the netting via an electric push rod pin 204. The other end of the electric push rod 203 is connected to the horn-turning mechanism connecting rod 202 via an electric push rod pin 204. The extension and retraction of the electric push rod 203 pushes the horn-turning mechanism connecting rod 202 to raise and lower the horn-turning device 2. When raised, it can expand the protection range of the main arm 1 of the netting. The upward extension angle can transfer the load to the main arm 1 of the netting when the construction line 7 accidentally falls onto the horn, and effectively prevent the construction line 7 from sliding off both sides of the main arm 1 of the netting. When lowered and retracted, it greatly reduces the transportation height of the mobile folding arm gantry.

[0024] The ram's horn flipping mechanism 201 consists of a ram's horn rod 20101, a ram's horn flipping base 20102, a ram's horn flipping pin 20103, a sliding fork 20104, and a fork pin 20105 (see appendix). Figure 10 The ram's horn rod 20101 is hinged to the ram's horn flip base 20102 via the ram's horn flip pin 20103. The shift fork pin 20105 hinges the sliding shift fork 20104 and the sliding groove at the bottom of the ram's horn rod 20101 in the sliding groove of the ram's horn flip base 20102. Pushing the sliding shift fork 20104 can drive the ram's horn rod 20101 to rotate along the ram's horn flip pin 20103, realizing the conversion between the supported and flat states of the ram's horn rod 20201.

[0025] Furthermore, the pitch and rotation mechanism 3 is connected below one end of the main arm 1 of the sealing net to adjust the horizontal angle of the main arm 1 and the angle between the main arm 1 and the ground. The pitch and rotation mechanism 3 consists of a pitch base 301, a rotation support 302, a pitch mechanism 304, a rotary turntable reducer 306, and a rotation drive module 307 (see appendix). Figure 11-17The pitch base 301 has two upper ear seats 30101 and two lower ear seats 30102 on one side. The upper ear seat 30101 at the upper end of the pitch base 301 is hinged to the long ear seat 30201 of the rotary support 302 through the rotary support connecting pin 303. The lower ear seat 30102 at the lower end of the pitch base 301 is hinged to one end of the pitch mechanism 304 through the pitch mechanism connecting pin 305. The other end of the pitch mechanism 304 is hinged to the short ear seat 30202 of the rotary support 302 through the pitch mechanism connecting pin 305. A rotary turntable reducer 306 and a rotary drive module 307 are mounted on the rotary support 302. During construction, the main boom 1 of the netting can be adjusted to a horizontal position at any location via the pitching mechanism 304. The rotary drive module 307 drives the rotary turntable reducer 306 to rotate, which can change the horizontal direction of the main boom 1 of the netting and adjust it to be parallel to the direction of the construction line 7. This not only ensures the protection range of the netting platform, but also improves the flexibility of the layout and makes it easier to select the parking and placement position of the crane.

[0026] Furthermore, the pitch mechanism 304 consists of two horizontal connecting rods 30401, four movable connecting rods 30402, a T-shaped lead screw assembly 30404, a lead screw nut 30405, a lead screw drive module 30406, and a connecting shaft 30407 (see Appendix). Figure 16-18 The T-shaped lead screw assembly 30404 is equipped with four movable connecting rods 30402 via lead screw nuts 30405. Each pair of movable connecting rods 30402 is connected to a horizontal connecting rod 30401 via a connecting rod pin 30403. The two horizontal connecting rods 30401 and the four movable connecting rods 30402 form a hexagonal structure symmetrical to the T-shaped lead screw assembly 30404. One end of the T-shaped lead screw assembly 30404 is equipped with a lead screw drive module 30406 and a connecting shaft 30407. The lead screw drive module 30406 drives the T-shaped lead screw assembly 30404 to rotate via the connecting shaft 30407, changing the position of the lead screw nut 30405 on the T-shaped lead screw assembly 30404, thereby driving the four movable connecting rods 30402 and changing the distance between the upper and lower horizontal connecting rods 30401.

[0027] Furthermore, the T-shaped lead screw assembly 30404 comprises a T-shaped lead screw 3040401, a lead screw sleeve 3040402, two bearing seats 3040403, two thrust bearings 3040404, two bearing pressure plates 3040405, three bushings 3040406, and a locking nut 3040407. The T-shaped lead screw 3040401 is connected to one end of the lead screw drive module 30406. Two bearing housings 3040403 are installed separately. The two bearing housings 3040403 respectively contain a thrust bearing 3040404 and a bearing pressure plate 3040405, which are locked by a lock nut 3040407 to withstand the axial force of the T-shaped lead screw 3040401. The T-shaped lead screw 3040401 between the two bearing housings 3040403 is equipped with a bushing 3040406 and a lead screw sleeve 3040402.

[0028] Furthermore, the lead screw drive module 30406 consists of a pitch drive motor 3040601 and a pitch planetary reducer 3040602. The pitch drive motor 3040601 is connected to the T-type lead screw assembly 30404 via the pitch planetary reducer 3040602 and a connecting shaft 30407. The lead screw drive module 30406 is powered by the pitch drive motor 3040601, and the pitch planetary reducer 3040602 amplifies the input torque.

[0029] Furthermore, the connecting base 4 is fixedly connected to the extended functional lug at the front end of the crane boom 5, and the spacing adjustment connecting seat equipped on it is used to meet the fixed connection with the front end of different crane booms. The connecting base 4 consists of a first spacing adjustment connecting seat 401, a second spacing adjustment connecting seat 402, a third spacing adjustment connecting seat 403, a fourth spacing adjustment connecting seat 404, and a connecting base plate 405 (see Appendix). Figure 19-22 The first spacing adjustment connecting seat 401 and the second spacing adjustment connecting seat 402 are symmetrically installed on the upper end of the connecting seat base plate 405, and the third spacing adjustment connecting seat 403 and the fourth spacing adjustment connecting seat 404 are symmetrically installed on the lower end of the connecting seat base plate 405. The first spacing adjustment connecting seat 401 and the second spacing adjustment connecting seat 402 are provided with adjustment mechanisms for adjusting the spacing between the two pin holes on both sides, and the third spacing adjustment connecting seat 403 and the fourth spacing adjustment connecting seat 404 are provided with adjustment mechanisms for adjusting the spacing between the two pin holes on both sides. At the same time, a sliding groove is provided to adjust the vertical spacing with the first spacing adjustment connecting seat 401 and the second spacing adjustment connecting seat 402. By adjusting the spacing between the pin holes on both sides and the vertical spacing, it can be adapted to the spacing specifications of the mounting holes on different crane booms 5, which facilitates installation and meets the needs of different construction scenarios.

[0030] Furthermore, the first pitch adjustment connector 401 and the second pitch adjustment connector 402 are symmetrical and identical in structure (see Appendix). Figure 19 The following description focuses on the first spacing adjustment connecting seat 401. The first spacing adjustment connecting seat 401 comprises an upper support leg 40101, an upper support leg seat 40102, a support leg pin 40103, an upper support leg pull rod 40104, an upper support leg pull rod pin 40105, an upper support leg T-shaped adjusting screw 40106, an upper support leg screw forward nut 40107, a limiting ear plate 40108, and an upper support leg screw limiting nut 40109. The upper support leg T-shaped adjusting screw 40106 is mounted on the limiting ear plate 40108 and secured by the upper support leg screw limiting nut 40109, ensuring the upper support... The T-shaped adjusting screw 40106 of the upper support leg can rotate without any slippage; the upper support leg seat 40102 is fixed to the upper end of the connecting seat base plate 405 by bolts; the upper support leg 40101 is hinged to the upper support leg seat 40102 via the support leg pin 40103; the upper support leg screw forward nut 40107 is installed in the slide groove of the upper support leg seat 40102; one end of the upper support leg pull rod 40104 is connected to the upper support leg 40101 via the upper support leg pull rod pin 40105, and the other end is connected to the upper support leg screw forward nut 40107. Rotating the upper support leg T-shaped adjusting screw 40106 can adjust and fix the upper support leg 40101 inward or outward along the hinge point, thereby changing the position of the pin hole of the upper support leg. The upper outrigger T-shaped adjusting screw 40106 has threads on both ends, with forward and reverse threads, which cooperate with the upper outrigger screw forward nut 40107 and the upper outrigger screw reverse nut 40201. When the upper outrigger T-shaped adjusting screw 40106 is rotated, the pin hole spacing of the first spacing adjusting connecting seat 401 and the second spacing adjusting connecting seat 402 can be adjusted symmetrically to ensure the force balance of the two outriggers after installation, improve the lateral force of the crane boom 5, and enhance the safety of use.

[0031] The third pitch adjustment connecting seat 403 and the fourth pitch adjustment connecting seat 404 are symmetrical and identical in structure. The third pitch adjustment connecting seat 403 will be described below. The third pitch adjustment connecting seat 403 consists of a lower left support leg 40301, a lower left support leg seat 40302, a support leg pin 40303, a lower support leg T-shaped adjusting screw 40304, a lower support leg screw nut 40305, a lower support leg screw sleeve 40306, and a lower support leg screw limiting nut 40307. The lower left support leg seat 40302 is connected to the lower end of the connecting seat base plate 405 by bolts and can slide up and down through the sliding groove on the lower left support leg seat 40302. The lower left support leg 40301 is hinged to the lower left support leg seat 40302 through the support leg pin 40303. The lower support leg screw… The sleeve 40306 is installed on the lower left outrigger 40301. The lower outrigger T-shaped adjusting screw 40304 is fitted inside the lower outrigger screw sleeve 40306 and secured by the lower outrigger screw limiting nut 40307, ​​ensuring that the lower outrigger T-shaped adjusting screw 40304 can rotate without slippage. The lower outrigger screw nut 40305 is installed on the lower left outrigger seat 40302. The lower outrigger T-shaped adjusting screw 40304 is installed inside the lower outrigger screw nut 40305. Rotating the lower outrigger T-shaped adjusting screw 40304 can screw the screw into the lower outrigger screw nut 40305, causing the lower left outrigger 40301 to move around the hinge point, thereby changing the position of the pin hole to adapt to the spacing of the mounting holes on different crane booms 5, facilitating installation and meeting the needs of different construction scenarios.

[0032] Furthermore, the pitch base 301 has multiple height connection holes distributed on it (see Appendix). Figure 23 The connecting hole is used to connect with the base plate 405. By changing the relative position of the pitch and rotation mechanism 3 and the connecting base 4 through the connecting hole, the height of the first spacing adjustment connecting seat 401 and the second spacing adjustment connecting seat 402 on the connecting base 4 can be changed when the mobile folding arm is in the transportation state. This can avoid the situation where the main arm of the netting cannot be adjusted to be parallel with the crane arm 5 after rotation and folding during transportation due to the functional expansion lug of the crane boom 5 being too low, resulting in an excessively high transportation height.

[0033] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement this application. The above examples do not limit the substantive content of the present invention in any way. Any simple modifications or variations made by those skilled in the art to the above specific embodiments based on the technical essence of the present invention after reading this specification, as well as equivalent embodiments that may be changed or modified using the disclosed technical content, all still fall within the scope of the present invention and do not depart from the essence and scope of the present invention.

Claims

1. A vehicle-mounted folding arm type netting device for overhead power line crossing construction, comprising a netting main arm (1), a horn-turning device (2), a pitching and rotating mechanism (3), and a connecting base (4), characterized in that: One end of the main arm (1) of the netting is equipped with a pitch and rotation mechanism (3), and a connecting base (4) is mounted on the pitch and rotation mechanism (3). The main arm (1) of the netting is connected to the front end of the crane boom (5) through the connecting base (4). The main arm (1) of the netting is symmetrically arranged with horn-turning devices (2) on both sides of the length direction.

2. The vehicle-mounted folding arm type netting device for overhead power line crossing construction according to claim 1, characterized in that: The main arm (1) of the sealing net is composed of a main beam (101), wing beams (102) and rollers (103). The wing beams (102) are evenly distributed on both sides of the main beam (101) and are perpendicular to the main beam (101). Rollers (103) are installed above the wing beams (102).

3. A vehicle-mounted folding arm type netting device for overhead power line crossing construction according to claim 1, characterized in that: The horn-turning device (2) consists of a horn-turning mechanism (201), a horn-turning mechanism connecting rod (202), an electric push rod (203), and an electric push rod pin (204). The horn-turning mechanism (201) is installed at the end of the wing beam (102). The horn-turning mechanism connecting rod (202) connects each horn-turning mechanism (201). One end of the electric push rod (203) is installed on the horn-turning mechanism (201) through the electric push rod pin (204), and the other end is connected to the horn-turning mechanism connecting rod (202) through the electric push rod pin (204).

4. A vehicle-mounted folding arm type netting device for overhead power line crossing construction according to claim 3, characterized in that: The ram's horn flipping mechanism (201) consists of a ram's horn rod (20101), a ram's horn flipping base (20102), a ram's horn flipping pin (20103), a sliding fork (20104), and a fork pin (20105). The ram's horn rod (20101) is hinged to the ram's horn flipping base (20102) through the ram's horn flipping pin (20103). The fork pin (20105) hinges the sliding fork (20104) and the sliding groove at the bottom of the ram's horn rod (20101) in the sliding groove of the ram's horn flipping base (20102).

5. A vehicle-mounted folding arm type netting device for overhead power line crossing construction according to claim 1, characterized in that: The pitch and rotation mechanism (3) consists of a pitch base (301), a rotation support (302), a pitch mechanism (304), a rotary turntable reducer (306), and a rotation drive module (307). An upper ear (30101) and a lower ear (30102) are fabricated on one side of the pitch base (301). The upper ear (30101) at the upper end of the pitch base (301) is hinged to the long ear (30201) of the rotation support (302) via a connecting pin (303) of the rotation support. 301) The lower ear seat (30102) at the lower end is hinged to one end of the pitch mechanism (304) through the pitch mechanism connecting pin (305), and the other end of the pitch mechanism (304) is hinged to the short ear seat (30202) of the rotating support (302) through the pitch mechanism connecting pin (305); a rotary turntable reducer (306) and a rotary drive module (307) are installed on the top of the rotating support (302); the pitch base (301) has multiple connecting holes that connect to the connecting seat base plate (405).

6. A vehicle-mounted folding arm type netting device for overhead power line crossing construction according to claim 5, characterized in that: The pitch mechanism (304) consists of two horizontal connecting rods (30401), four movable connecting rods (30402), a T-shaped lead screw assembly (30404), a lead screw nut (30405), a lead screw drive module (30406), and a connecting shaft (30407). The T-shaped lead screw assembly (30404) is equipped with four movable connecting rods (30402) via lead screw nuts (30405). Each pair of movable connecting rods (30402) is connected to a horizontal connecting rod (30401) via a connecting rod pin (30403). The two horizontal connecting rods (30401) and the four movable connecting rods (30402) form a hexagonal structure symmetrical to the T-shaped lead screw assembly (30404). The lead screw drive module (30406) and the connecting shaft (30407) are mounted on one end of the T-shaped lead screw assembly (30404).

7. A vehicle-mounted folding arm type netting device for overhead power line crossing construction according to claim 6, characterized in that: The T-shaped lead screw assembly (30404) consists of a T-shaped lead screw (3040401), a lead screw sleeve (3040402), two bearing seats (3040403), two thrust bearings (3040404), a bearing pressure plate (3040405), a bushing (3040406), and a locking nut (3040407). The T-shaped lead screw (3040401) is driven by the lead screw drive module (30406). Two bearing housings (3040403) are installed at intervals on one end. The two bearing housings (3040403) are respectively equipped with a thrust bearing (3040404) and a bearing pressure plate (3040405), and are locked by a lock nut (3040407). A bushing (3040406) and a screw sleeve (3040402) are installed on the T-shaped screw (3040401) between the two bearing housings (3040403).

8. A vehicle-mounted folding arm type netting device for overhead power line crossing construction according to claim 6, characterized in that: The lead screw drive module (30406) consists of a pitch drive motor (3040601) and a pitch planetary reducer (3040602). The pitch drive motor (3040601) is connected to the T-type lead screw assembly (30404) through the pitch planetary reducer (3040602) and the connecting shaft (30407).

9. A vehicle-mounted folding arm type netting device for overhead power line crossing construction according to claim 1, characterized in that: The connecting base (4) consists of a first spacing adjustment connecting base (401), a second spacing adjustment connecting base (402), a third spacing adjustment connecting base (403), a fourth spacing adjustment connecting base (404), and a connecting base base plate (405). The first spacing adjustment connecting base (401) and the second spacing adjustment connecting base (402) are symmetrically installed on the upper end of the connecting base base plate (405), and the third spacing adjustment connecting base (403) and the fourth spacing adjustment connecting base (404) are symmetrically installed on the lower end of the connecting base base plate (405). Each of the first spacing adjustment connecting base (401), the second spacing adjustment connecting base (402), the third spacing adjustment connecting base (403), and the fourth spacing adjustment connecting base (404) is provided with an adjustment mechanism, which adjusts the spacing between the four connecting bases.

10. A vehicle-mounted folding arm type netting device for overhead power line crossing construction according to claim 9, characterized in that: The first pitch adjustment connector (401) and the second pitch adjustment connector (402) are symmetrical and identical in structure. The first pitch adjustment connector (401) will be described in the following description. The first pitch adjustment connector (401) consists of an upper support leg (40101), an upper support leg seat (40102), a support leg pin (40103), an upper support leg pull rod (40104), an upper support leg pull rod pin (40105), an upper support leg T-shaped adjusting screw (40106), an upper support leg screw forward nut (40107), a limiting ear plate (40108), and an upper support leg screw limiting nut (40109). The upper support leg T-shaped adjusting screw (40106) is installed on the limiting ear plate (40108) and secured by the upper support leg screw limiting nut (40109); both ends of the upper support leg T-shaped adjusting screw (40106) are connected to the upper support leg screw forward rotation nut (40107); the upper support leg seat (40102) is fixed to the upper end of the connecting seat base plate (405) by bolts; the upper support leg (40101) is hinged to the upper support leg seat (40102) through the support leg pin (40103), and the upper support leg screw forward rotation nut (40107) is installed in the sliding groove of the upper support leg seat (40102). One end of the upper support leg pull rod (40104) is connected to the upper support leg (40101) through the upper support leg pull rod pin (40105), and the other end is connected to the upper support leg screw forward rotation nut (40107).

11. A vehicle-mounted folding arm type netting device for overhead power line crossing construction according to claim 9, characterized in that: The third and fourth pitch adjustment connecting seats (403 and 404) are symmetrical and identical in structure. The third pitch adjustment connecting seat (403) will be used as an example. The third pitch adjustment connecting seat (403) consists of a lower left support leg (40301), a lower left support leg seat (40302), a support leg pin (40303), a lower support leg T-shaped adjusting screw (40304), a lower support leg screw nut (40305), a lower support leg screw sleeve (40306), and a lower support leg screw limiting nut (40307). The lower left support leg seat (40302) is connected to the lower end of the connecting seat base plate (405) by bolts and can be connected via the lower left... The slide groove on the outrigger seat (40302) slides up and down. The lower left outrigger (40301) is hinged to the lower left outrigger seat (40302) through the outrigger pin (40303). The lower outrigger screw sleeve (40306) is installed on the lower left outrigger (40301). The lower outrigger T-shaped adjusting screw (40304) is fitted inside the lower outrigger screw sleeve (40306) and is fixed by the lower outrigger screw limiting nut (40307). The lower outrigger screw nut (40305) is installed on the lower left outrigger seat (40302). The lower outrigger T-shaped adjusting screw (40304) is installed inside the lower outrigger screw nut (40305).

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