A rotary support mechanism of a holding pole with an anti-overturning safety protection structure

Abstract

The application discloses a holding pole rotary support mechanism with an anti-overturning safety protection structure and relates to the hoisting technical field.The holding pole rotary support mechanism comprises, from top to bottom, a rotary upper seat, a rotary support and a rotary lower seat, and an insurance ring.The insurance ring is arranged at the bottom of the rotary lower seat, and an overturning gap is formed between the insurance ring and the rotary lower seat.A connecting piece penetrates through the rotary upper seat and is connected with the insurance ring, so that when the rotary upper seat overturns, the connecting piece drags the insurance ring to abut against the bottom wall of the rotary lower seat.The rotary lower seat is provided with a lower seat hole, and the insurance ring abuts against the outside of the lower seat hole when it is inclined.The insurance ring is arranged at the bottom of the rotary lower seat and is connected with the rotary upper seat, passive bearing and graded energy absorption are realized when the rotary support fails or the arm frame generates unbalanced partial load, and therefore, the anti-overturning capacity of the holding pole rotary support mechanism and the overall operation safety are remarkably improved.

Description

Technical Field

[0001] This application relates to the field of hoisting technology, specifically to a slewing support mechanism with an anti-tipping safety protection structure. Background Technology

[0002] In the construction of power transmission lines, the erection of ultra-high voltage (UHV) towers is currently the main task of line construction. UHV towers are generally four-sided pyramidal towers assembled from steel pipes.

[0003] When erecting ultra-high voltage transmission towers, it is necessary to first build the ground foundation and tower base on the ground, and then gradually build the tower components upwards. When the ultra-high voltage transmission tower is erected to a certain height, in order to safely transport each component to the erection height, it is necessary to use a lifting pole as an auxiliary hoisting tool.

[0004] The boom consists of the boom body, the turntable, and the boom. The boom is rotatably connected to the boom body through the turntable. The boom is at a high construction height, and it is prone to overturning accidents due to force imbalance, improper operation, and external factors (such as strong winds). The turntable is the weakest part of the boom and is very easy to overturn, resulting in great safety risks.

[0005] CN121672351A discloses a steel rope type boom slewing support mechanism with anti-tipping function, including a safety ring. The top of the safety ring is fixedly connected to the upper slewing seat so that when the upper slewing seat deflects, the safety ring abuts against the bottom of the lower slewing seat. An anti-tipping mechanism is provided at the bottom of the safety ring. This invention uses the anti-tipping mechanism to apply the deflection force to the fixed boom section at the bottom of the lower slewing seat, thereby increasing the support points for the slewing support and upper slewing seat after deflection. By supporting the safety ring and upper slewing seat at multiple points, the anti-tipping capacity of the boom section and boom is improved. In addition, by integrating most of the structure of the anti-tipping mechanism, except for the mounting sleeve, onto the anti-tipping rod, it is easy to disassemble and assemble the anti-tipping mechanism as a whole, facilitating maintenance and replacement by workers at high altitudes without affecting the anti-tipping function.

[0006] In the aforementioned support mechanism, an anti-tipping mechanism is installed at the bottom of the slewing lower seat to provide rigid support for the safety ring. This means that the deflection force is applied to the fixed mast section at the bottom of the slewing lower seat, and when an abnormal unbalanced bias load occurs, it will act on the entire mast. Summary of the Invention

[0007] In view of this, the embodiments of this application aim to provide a slewing support mechanism with an anti-overturning safety protection structure, which can effectively prevent overall overturning when the slewing support fails or an unbalanced load occurs.

[0008] To achieve the above objectives, the first aspect of this application provides: a slewing support mechanism with an anti-overturning safety protection structure, comprising a slewing upper seat, a slewing support, and a slewing lower seat arranged sequentially from top to bottom, and further comprising: A safety ring is located at the bottom of the lower rotating seat, and an overturning gap is formed between the safety ring and the lower rotating seat; A connector that passes through the upper slewing seat and is connected to the safety ring, so that when the upper slewing seat overturns, the connector pulls the safety ring against the bottom wall of the lower slewing seat. The rotating lower seat is provided with a lower seat hole, and the safety ring abuts against the outside of the lower seat hole when tilted.

[0009] Furthermore, the upper rotary seat is provided with an upper seat hole, the rotary support is provided with a support hole, and the rotary support includes a rotating part and a fixed part. The upper rotary seat is connected to the rotating part, and the lower rotary seat is connected to the fixed part, so that the upper rotary seat can drive the rotating part to rotate relative to the fixed part and the lower rotary seat. The upper rotating seat has a rectangular frame on its outer side, and the top surface of the rectangular frame protrudes to form a connecting seat.

[0010] Furthermore, the diameter of the upper seat hole is smaller than the diameter of the support hole, so that the projections of the rotating upper seat and the safety ring in the height direction have an overlapping area, and the connecting member is located in the overlapping area and is equally spaced along the circumference of the upper seat hole.

[0011] Furthermore, a support ring is provided between the rotating part and the fixed part. The upper and lower sides of the support ring respectively contact the fixed part and the rotating part, and the support ring can rotate relative to the rotating part and the fixed part. Several reinforcing ribs are provided on the inner side of the support ring. The rotating part is provided with a positioning post at the connection between the rotating part and the support ring. One side of the positioning post is provided with an end face so that when the rotating part rotates toward the end face, it drives the support ring to rotate. A first spring is provided at one end of the positioning post that extends into the rotating part to support the positioning post so that when the rotating part rotates in the opposite direction to the end face, the positioning post is squeezed into the rotating part.

[0012] Furthermore, a positioning head is provided at the connection between the fixing part and the support ring. A second spring is provided at one end of the positioning head that extends into the fixing part to support the positioning head, so that when the rotating part drives the support ring to rotate toward the end face, the positioning head is squeezed into the fixing part. The support ring has a first recess on the side facing the positioning post and a second recess on the side facing the positioning head. The first recess and the second recess are respectively adapted to the positioning post and the positioning head.

[0013] Furthermore, a first chamber is provided on the inner side of the rotating lower seat. The first chamber is equally spaced along the circumference of the lower seat hole. A first top block is provided on the inner side of the first chamber facing the safety ring. The first chamber is filled with a medium, and the first top block contacts the safety ring under the pressure of the filling medium. When the safety ring is tilted, the first top block is pushed to retract into the first chamber.

[0014] Furthermore, a second chamber is provided inside the rotating part, the second chambers are evenly spaced along the support holes, a second top block is provided inside the second chamber facing the fixed part, the second chamber is filled with a medium, and a perforation is opened on the top of the rotating part; The end of the second top block is located inside the perforation and is connected to the rotating part after being at least partially melted, so that when the rotating part is subjected to overturning load deformation, the second top block and the molten position of the rotating part are deformed, and the second top block is pushed out under the pressure of the filling medium inside the second chamber.

[0015] Furthermore, a top rod is provided inside the first chamber, the top rod passes through the first chamber and extends toward the second chamber, a push rod is provided inside the second chamber, the push rod passes through the second chamber and extends toward the first chamber, and a linkage is provided between the top rod and the push rod; The linkage includes a positioning plate and a push block. The positioning plate is located in the lower seat hole and welded to the rotary lower seat. The push block is installed inside the positioning plate and can rotate relative to the positioning plate. The top rod and the push rod both abut against the push block.

[0016] Furthermore, a deformation gap is formed between the second chamber and the rotating part.

[0017] Furthermore, the overturning gap between the rotating lower seat and the safety ring is 1.5-2.5cm.

[0018] This invention achieves passive bearing and graded energy absorption when the slewing support fails or the boom generates unbalanced loads by setting a safety ring at the bottom of the lower slewing support that connects to the upper slewing support. This significantly improves the overturning resistance and overall operational safety of the slewing support mechanism, reduces the risk of major overturning accidents, and facilitates on-site inspection and maintenance.

[0019] The safety ring is connected to the upper slewing seat through a through connector. When the upper seat is offset, it can quickly change from a follower to a load-bearing component, directly transferring the lateral overturning load to the lower slewing seat. This achieves immediate mechanical restraint on the upper slewing table and boom, preventing overall overturning after the slewing support fails.

[0020] The support ring, together with the positioning column and positioning head, features a one-way limiting design, allowing the force to shift along a predetermined direction under repeated eccentric loading of the boom. Combined with the inner reinforcing ribs to disperse stress, this can reduce local fatigue accumulation and extend the service life of the slewing bearing.

[0021] The first and second chambers, the top block, and the linkage mechanism of the top rod, push rod, and push block, located in the lower seat and rotating part, constitute a graded buffer and trigger release system. This system can absorb impact energy in the initial stage and trigger controllable release and linkage under overload conditions, providing a smooth energy transfer path and structural self-rescue capability, and reducing the damage to components caused by instantaneous impact.

[0022] Other features and advantages of this application will be set forth in the following description, and in part will be apparent from the description, or may be learned by practicing the application. The objectives and other advantages of this application may be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings. Attached Figure Description

[0023] Figure 1 This is the assembly drawing for this application; Figure 2 This is a disassembled diagram of this application; Figure 3 This is a cross-sectional view of this application; Figure 4 This is a schematic diagram of the support ring structure of this application; Figure 5 This is a plan view of the rotating and fixed parts of this application; Figure 6 This is a schematic diagram of the first recess in this application; Figure 7 This is a schematic diagram of the positioning column and positioning head structure of this application; Figure 8 This is a schematic diagram of the first chamber and the second chamber of this application; Figure 9 This is a schematic diagram of the second chamber and rotating part structure of this application; Figure 10 This is a schematic diagram of the linkage structure in this application; Figure 11 This is a schematic diagram of the push rod and push rod structure of this application.

[0024] In the diagram: 100° upper seat, 200° support, 300° lower seat, 400° safety ring, 500° connector; 10 upper seat hole, 20 support hole, 30 lower seat hole; 21 Rotating part, 22 Fixed part, 23 Rectangular frame; 211 Support ring, 212 Reinforcing rib, 213 Positioning post, 214 End face, 215 First spring, 216 Positioning head, 217 Second spring, 218 First recess, 219 Second recess; 221 First chamber, 222 First top block, 223 Second chamber, 224 Second top block, 225 Perforation, 226 Top rod, 227 Push rod, 228 Linkage component; 81 Positioning plate, 82 Push block; k-deformation gap, r-overturning gap. Detailed Implementation

[0025] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion.

[0027] In the description of the embodiments of this application, the technical terms "first," "second," "third," etc., are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0028] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0029] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0030] The boom consists of the boom body, the turntable, and the boom. The boom is rotatably connected to the boom body through the turntable. The boom is at a high construction height, and it is prone to overturning accidents due to force imbalance, improper operation, and external factors (such as strong winds). The turntable is the weakest part of the boom and is very easy to overturn, resulting in great safety risks.

[0031] Because the boom is rigidly connected to the slewing platform, when a lateral force deviates from the vertical direction on the boom, and the lateral overturning force exceeds the load that the slewing support can withstand, the entire boom will overturn.

[0032] To address the aforementioned problems, this application provides a pole slewing support mechanism with an anti-overturning safety protection structure, see reference. Figures 1-3 As shown, the structure includes a slewing upper seat 100, a slewing support 200, and a slewing lower seat 300 arranged sequentially from top to bottom. The slewing upper seat 100 is connected to the boom, and the slewing lower seat 300 is connected to the boom body. The slewing upper seat 100, the slewing support 200, and the slewing lower seat 300 are arranged coaxially. A connector 500 is provided inside the slewing upper seat 100. The connector 500 passes through the slewing upper seat 100 and extends to the bottom of the slewing lower seat 300. A safety ring 400 is provided at the bottom of the slewing lower seat 300, and the safety ring 400 is connected to the connector 500.

[0033] The safety ring 400 and the bottom of the slewing lower seat 300 are fitted with a clearance to create an overturning clearance r between the safety ring 400 and the slewing lower seat. When the boom causes the slewing upper seat 100 to overturn, the slewing upper seat 100 tilts the safety ring 400 through the connector 500, so that the side of the safety ring 400 away from the overturning direction abuts against the bottom of the slewing lower seat 300, transferring the overturning load to the slewing lower seat 300. This prevents the slewing support 200 from failing, which could lead to the overall overturning of the slewing platform and boom, thus avoiding serious safety incidents.

[0034] It should be noted that the overturning clearance r between the slewing lower seat 300 and the safety ring 400 is 1.5-2.5cm.

[0035] When the boom causes the upper slewing seat to overturn laterally, the upper slewing seat 100 transmits the overturning displacement to the safety ring 400 through the through connector 500. During the tilting process, the side of the safety ring 400 away from the overturning direction quickly abuts against the bottom of the lower slewing seat 300, thereby transmitting the lateral overturning load from the slewing support 200 to the lower slewing seat 300, thus blocking the overall overturning link between the upper slewing table and the boom and achieving passive anti-overturning protection.

[0036] In some embodiments, see Figures 2-3As shown, the upper rotating seat 100 is provided with an upper seat hole 10 on its inner side, the rotating support 200 is provided with a support hole 20 on its inner side, and the lower rotating seat 300 is provided with a lower seat hole 30 on its inner side. The outer diameter of the safety ring 400 is larger than the diameter of the lower seat hole 30. When the safety ring 400 is tilted against the lower rotating seat 300, it abuts against the outside of the lower seat hole 30.

[0037] For example, the lower seat hole 30 has a diameter of 630mm, and the safety ring 400 has an outer diameter of 670mm, an inner diameter of 390mm, a thickness of 22mm, and is made of Q355B material.

[0038] The upper seat hole 10 has a smaller diameter than the support hole 20, so that the projections of the rotating upper seat 100 and the safety ring 400 in the height direction overlap. The connecting piece 500 is located between the overlapping areas of the projections of the rotating upper seat 100 and the safety ring 400 in the height direction and is evenly spaced along the circumference.

[0039] Furthermore, the connector 500 includes a bolt and a nut, with the bolt passing downwards through at least the upper rotating seat 100, the support hole 20, the lower seat hole 30, and the safety ring 400 in sequence before being locked by the nut. For example, the number of bolts is 8, the nominal diameter of the bolts is 24 mm, the bolt grade is 10.9, the tensile strength is 1000 MPa, and the yield strength is 900 MPa.

[0040] As a further illustration of this embodiment, the number of bolts, nominal diameter of the bolts, grade of the bolts, and size and material data of the safety ring 400 used in this embodiment are not limitations on the present invention, but merely exemplary illustrations. Those skilled in the art can reasonably set these parameters according to the magnitude of the overturning force, and they belong to known technologies.

[0041] In some embodiments, see Figure 2 As shown, a rectangular frame 23 is provided on the outer side of the upper slewing seat 100 and welded to the rectangular frame 23. The rectangular frame 23 is located at the four corners, and the top surface of the rectangular frame 23 protrudes to form a connecting seat. The lower slewing seat 300 is annular, and the bottom surface of the lower slewing seat 300 protrudes to form a connecting seat. The upper slewing seat 100 is connected to the boom through the connecting seat, and the lower slewing seat 300 is connected to the main body of the boom through the connecting seat.

[0042] The upper slewing seat 100 and the connecting seat or the lower slewing seat 300 and the connecting seat are all integral parts.

[0043] See Figure 4 As shown, the slewing support 200 includes a rotating part 21 and a fixed part 22. The rotating part 21 is connected to the upper slewing seat 100, and the fixed part 22 is connected to the lower slewing seat 300. After the rotating part 21 is connected to the upper slewing seat 100, it can rotate synchronously with the upper slewing seat 100 relative to the fixed part 22.

[0044] Understandably, the rotating upper seat 100 can be connected to the rotating part 21 independently via the connecting member, and can also be connected to the rotating part 21 via the connecting member 500. When the rotating upper seat 100 and the rotating part 21 are connected via the connecting member 500, the rotating part 21 extends to the connecting member 500 and is penetrated by bolts and fixed by nuts.

[0045] In some embodiments, see Figures 4-7 As shown, a support ring 211 is provided between the rotating part 21 and the fixed part 22. The support ring 211, the rotating part 21 and the fixed part 22 are all coaxially arranged, and the upper and lower parts of the support ring 211 contact the fixed part 22 and the rotating part 21 respectively. When the rotating upper seat 100 experiences a lateral force biased towards the vertical direction, the rotating part 21 and the fixed part 22 squeeze the support ring 211. Several reinforcing ribs 212 are provided on the inner side of the support ring 211 to enhance the strength of the support ring 211.

[0046] Because the boom's lifting position is fixed, when it tilts during rotation, it will repeatedly apply pressure to one side of the support ring 211, leading to increased fatigue on that side of the support ring 211.

[0047] Furthermore, a first recess 218 and a second recess 219 are respectively provided at the contact positions between the support ring 211 and the rotating part 21 and the fixed part 22. A positioning post 213 is provided inside the rotating part 21. One side of the positioning post 213 is an end face 214, and the positioning post 213 can be stored inside the rotating part 21. A first spring 215 is provided at one end of the positioning post 213 located inside the rotating part 21 to support the positioning post 213. The positioning post 213 is pushed outward under the action of the first spring 215. The first recess 218 is adapted to the positioning post 213. A positioning head 216 is provided inside the fixing part 22. The positioning head 216 can be stored inside the fixing part 22. A second spring 217 is provided at one end of the positioning head 216 inside the fixing part 22 to support the positioning head 216. The positioning head 216 is pushed outward under the action of the second spring 217. The second recess 219 is adapted to the positioning head 216.

[0048] It should be noted that the number of positioning heads 216 and second recesses 219 is greater than the number of positioning posts 213 and first recesses 218. The positioning posts 213 and positioning heads 216 are both set to be arc-shaped on the side where they are inserted into the first recesses 218 and second recesses 219, and their end faces 214 are perpendicular to the bottom surface of the support ring 211, so that the rotating part 21 can only drive the support ring 211 to rotate in one direction.

[0049] When the rotating part 21 rotates toward the end face 214, since the end face 214 is perpendicular to the end face 214 of the support ring 211, the first recess 218 is adapted to the positioning post 213 with the end face 214, and the positioning post 213 is not subject to contraction force, thereby driving the support ring 211 to rotate. When the rotating part 21 rotates in the opposite direction toward the end face 214, the contact position between the positioning pin 213 and the first recess 218 is arc-shaped, and the number of positioning heads 216 is greater than the number of positioning pins 213. The positioning pins 213 will be subjected to contraction force, thereby contracting into the rotating part 21, at which time the support ring 211 is limited.

[0050] With this configuration, the force position of the support ring 211 can be changed unidirectionally when the boom rotates during hoisting.

[0051] When the support ring 211 between the rotating part 21 and the fixed part 22 is subjected to repeated eccentric load, the reinforcing rib 212 on the inner side of the support ring 211 disperses the stress, and the one-way limiting cooperation between the positioning column 213 and the positioning head 216 causes the support ring 211 to change the force position in a predetermined direction under repeated eccentric load of the boom: when the rotating part 21 rotates toward the end face 214, the positioning column 213 does not retract and pushes the support ring 211 to rotate; when it rotates in the opposite direction, the positioning column 213 retracts into the rotating part 21, and the support ring 211 is limited and does not move, thereby realizing unidirectional force transfer to reduce local fatigue.

[0052] In some embodiments, see Figures 8-9 As shown, a first chamber 221 is provided inside the rotating lower seat 300. A first top block 222 extending towards the safety ring 400 is disposed in the first chamber 221. The first chamber 221 is filled with a medium so that the first top block 222 contacts the safety ring 400. When the safety ring 400 is pulled and tilted by the rotating upper seat 100 to abut against the rotating lower seat 300, it pushes the first top block 222 to retract into the first chamber 221, increasing the pressure of the filling medium.

[0053] The first chamber 221 and its first top block 222 provided in the rotary lower seat 300 play a buffering role when the safety ring 400 abuts against the rotary lower seat 300: the safety ring 400 squeezes the first top block 222 to make it contract and enter the first chamber 221, the pressure of the medium filling the first chamber 221 increases, thereby absorbing part of the impact energy and making the load transmission smoother, reducing the risk of damage to the lower seat and support components from instantaneous impact.

[0054] Furthermore, a second chamber 223 is provided inside the rotating part 21, and a deformation gap k is formed between the second chamber 223 and the rotating part 21. The deformation gap k is located at a weak point of the rotating part 21 to avoid damage to the second chamber 223 after deformation of the rotating part 21. The second chambers 223 are evenly spaced along the circumference of the support hole 20. A second top block 224 facing the fixing part 22 is arranged inside the second chamber 223. The second chamber 223 is filled with a medium.

[0055] The rotating part 21 has a perforation 225 at its top. The end of the second top block 224 extends into the perforation 225 and is at least partially melted and connected to the rotating part 21. The first chamber 221 and the second chamber 223 are connected by a hydraulic pipe so that when the rotating upper seat 100 drives the rotating part 21 to tilt and deform, the molten position of the second top block 224 and the connecting part is stretched and broken. Under the pressure of the medium filling the second chamber 223, the second top block 224 is pushed out.

[0056] When the rotating part 21 is subjected to excessive deformation, the second top block 224 in the second chamber 223 triggers release through local fusion connection with the perforation 225 at the top of the rotating part 21: the deformation stretches the fusion connection of the rotating part 21, causing it to break. The pressure of the medium in the connected second chamber 223 pushes the second top block 224 out, triggering subsequent linkage or deformation release, thereby providing a controllable energy release and structural self-rescue mechanism.

[0057] It should be noted that the first chamber 221 and the second chamber 223 are connected. When overturning occurs, the first top block 222 on the side away from the overturning direction is squeezed by the safety ring 400. The safety ring 400 abuts against the rotating lower seat 300, and the medium inside the first chamber 221 enters the second chamber 223, further increasing the medium pressure inside the second chamber 223, thereby causing the second top block 224 to break at the melting position of the rotating part 21.

[0058] When the first chamber 221 is connected to the second chamber 223, the pressure of the safety ring 400 on the first top block 222 will cause the medium to flow to the second chamber 223 and increase its internal pressure, thereby causing the second top block 224 to detach from the molten connection and be ejected, forming a graded protection process from passive contact to active release, ensuring the orderly distribution of deformation and energy at different overturning stages.

[0059] In some embodiments, see Figures 10-11As shown, a push rod 226 is provided inside the first chamber 221. The push rod 226 passes through the first chamber 221 and extends to the outside of the first chamber 221. A push rod 227 is provided inside the second chamber 223. The push rod 227 passes through the second chamber 223 and extends to the outside of the second chamber 223. A linkage 228 is provided between the push rod 226 and the push rod 227 so that the rotating part 21 can drive the second chamber 223 to rotate without affecting the pressurization of the first chamber 221 on the second chamber 223 when overturning.

[0060] The linkage 228 includes a positioning plate 81 and a push block 82. The positioning plate 81 is located inside the lower seat hole 30 and welded to the rotary lower seat 300. The push block 82 is oscillatingly mounted inside the positioning plate 81. The push rod 226 contacts the push block 82 with the push rod 227. When the safety ring 400 is tilted, the first push block 222 is squeezed, and the push rod 226 pushes the push block 82 to oscillate, causing the push rod 227 to move into the second chamber 223, increasing the medium pressure inside the second chamber 223.

[0061] The push rod 226 in the first chamber extends outward and pushes the push block 82 in the positioning plate 81 to swing when the safety ring 400 is pressed. The push block 82 drives the push rod 227 in the second chamber 223 to move inward, thereby further increasing the medium pressure in the second chamber 223 and assisting in pushing out the second top block 224. The linkage of the push rod 226, push rod 227 and push block 82 amplifies the local displacement into the chamber pressure increment, realizing mechanical amplification and linkage protection.

[0062] It should be noted that this application does not limit the filling medium inside the first chamber 221 and the second chamber 223, and those skilled in the art can reasonably replace it according to the usage scenario. In a preferred embodiment, the filling medium is water or calcium chloride solution.

[0063] The advantages of calcium chloride solution compared to water are its higher density and lower freezing point.

[0064] For example, a 20% calcium chloride solution has a freezing point of approximately -18°C. A 30% calcium chloride solution can drop to below -48°C. For high-altitude mountainous areas, and especially for low nighttime and winter temperatures, preparing an appropriately concentrated calcium chloride solution ensures that the filling medium remains liquid at extreme temperatures, thus guaranteeing the continuity and safety of construction.

[0065] The above embodiments are merely illustrative of the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and all should be covered within the scope of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein.

Claims

1. A derrick swing support mechanism with anti-overturning safety protection structure, comprising a swing upper seat (100), a swing support (200) and a swing lower seat (300) arranged in sequence from top to bottom, characterized in that, It also includes: a safety ring (400), which is located at the bottom of the slewing lower seat (300), and an overturning gap (r) is formed between the safety ring (400) and the slewing lower seat (300); A connector (500) passes through the upper slewing seat (100) and is connected to the safety ring (400) so that when the upper slewing seat (100) overturns, the connector (500) pulls the safety ring (400) to abut against the bottom wall of the lower slewing seat (300). The rotary lower seat (300) is provided with a lower seat hole (30), and the safety ring (400) abuts against the outside of the lower seat hole (30) when tilted; The upper rotating seat (100) is provided with an upper seat hole (10), the rotating support (200) is provided with a support hole (20), and the rotating support (200) includes a rotating part (21) and a fixed part (22). The upper rotating seat (100) is connected to the rotating part (21), and the lower rotating seat (300) is connected to the fixed part (22), so that the upper rotating seat (100) can drive the rotating part (21) to rotate relative to the fixed part (22) and the lower rotating seat (300). The upper rotating seat (100) is provided with a rectangular frame (23) on its outer side, and the top surface of the rectangular frame (23) protrudes to form a connecting seat; The diameter of the upper seat hole (10) is smaller than the diameter of the support hole (20) so that the projection of the rotating upper seat (100) and the safety ring (400) in the height direction has an overlapping area. The connector (500) is located in the overlapping area and is evenly spaced along the circumference of the upper seat hole (10). A support ring (211) is provided between the rotating part (21) and the fixed part (22). The upper and lower sides of the support ring (211) respectively contact the fixed part (22) and the rotating part (21), and the support ring (211) can rotate relative to the rotating part (21) and the fixed part (22). Several reinforcing ribs (212) are provided on the inner side of the support ring (211). A positioning post (213) is provided at the connection between the rotating part (21) and the support ring (211). An end face (214) is provided on one side of the positioning post (213) so that when the rotating part (21) rotates toward the end face (214), it drives the support ring (211) to rotate. A first spring (215) is provided at one end of the positioning post (213) that extends into the rotating part (21) to support the positioning post (213) so that when the rotating part (21) rotates in the opposite direction toward the end face (214), the positioning post (213) is squeezed into the rotating part (21). A positioning head (216) is provided at the connection between the fixed part (22) and the support ring (211). A second spring (217) is provided at one end of the positioning head (216) extending into the fixed part (22) to support the positioning head (216) so that when the rotating part (21) drives the support ring (211) to rotate toward the end face (214), the positioning head (216) is squeezed into the fixed part (22). The support ring (211) is provided with a first recess (218) on the side facing the positioning post (213), and a second recess (219) is provided on the side facing the positioning head (216). The first recess (218) and the second recess (219) are respectively adapted to the positioning post (213) and the positioning head (216).

2. The rotary support mechanism of the holding pole with the anti-overturning safety protection structure according to claim 1, characterized in that, The inner side of the rotary lower seat (300) is provided with a first chamber (221). The first chamber (221) is arranged at equal intervals along the circumference of the lower seat hole (30). The inner side of the first chamber (221) is provided with a first top block (222) facing the safety ring (400). The first chamber (221) is filled with a medium. The first top block (222) contacts the safety ring (400) under the pressure of the filling medium. When the safety ring (400) is tilted, it pushes the first top block (222) to retract into the first chamber (221).

3. The rotary support mechanism of the holding pole with the anti-overturning safety protection structure according to claim 2, characterized in that, The rotating part (21) is provided with a second chamber (223) on its inner side. The second chamber (223) is evenly spaced along the support hole (20). The second chamber (223) is provided with a second top block (224) facing the fixed part (22) on its inner side. The second chamber (223) is filled with a medium. The rotating part (21) has a perforation (225) on its top. The end of the second top block (224) is located inside the perforation (225) and is connected to the rotating part (21) after being at least partially melted, so that when the rotating part (21) is subjected to overturning load deformation, the second top block (224) and the rotating part (21) are deformed at the melt position, and the second top block (224) is pushed out under the pressure of the filling medium inside the second chamber (223).

4. The rotary support mechanism of the holding pole with the anti-overturning safety protection structure according to claim 3, characterized in that, A push rod (226) is provided inside the first chamber (221). The push rod (226) passes through the first chamber (221) and extends toward the second chamber (223). A push rod (227) is provided inside the second chamber (223). The push rod (227) passes through the second chamber (223) and extends toward the first chamber (221). A linkage (228) is provided between the push rod (226) and the push rod (227). The linkage component (228) includes a positioning plate (81) and a push block (82). The positioning plate (81) is located in the lower seat hole (30) and welded to the rotary lower seat (300). The push block (82) is installed inside the positioning plate (81) and can rotate relative to the positioning plate (81). The top rod (226) and the push rod (227) both abut against the push block (82).

5. A slewing support mechanism with an anti-overturning safety protection structure according to claim 4, characterized in that, A deformation gap (k) is formed between the second chamber (223) and the rotating part (21).

6. A slewing support mechanism with an anti-overturning safety protection structure according to claim 1, characterized in that, The overturning gap (r) between the slewing lower seat (300) and the safety ring (400) is 1.5-2.5cm.

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