Bottom die disengaging type needle beam trolley

Abstract

The invention relates to the technical field of tunnel construction equipment, in particular to a needle beam trolley with a separated bottom formwork, which is characterized in that a side formwork and a top formwork are designed into an integral linkage structure, and an electric telescopic rod and a plurality of groups of oil cylinders are integrated for cooperative control, so that efficient and accurate demolding and quick positioning of the side top formwork are realized. Electric telescopic rods are removed firstly, then the side molds are driven to overturn inwards for demolding through contraction of the oil cylinders, and the side molds are naturally folded to the two sides of the needle beam through the hinge relation; and the top die is driven to integrally move to the next bin through winch traction, and is aligned with the bottom die which is in place to form a closed lining ring. According to the integrated moving and positioning mode, the transition time is greatly shortened, parallel operation of the bottom die and the side top die is supported, multi-bin-section circulating pouring is achieved, the construction continuity and the trolley utilization rate are remarkably improved, and the method is suitable for concrete lining construction of various circular and quasi-circular tunnels.

Description

Technical Field

[0001] This invention relates to the field of tunnel construction equipment technology, and in particular to a bottom formwork detachable needle beam trolley. Background Technology

[0002] With the advancement of science and technology, the uneven distribution of water resources has become a prominent issue. For arid regions, constructing long-distance canals or waterways is particularly important to divert water from water-rich areas to distribution points and downstream areas along the way. When canals encounter roads or ditches at level, inverted siphon technology is typically used to address this, allowing water to pass under the road surface or ditch. Inverted siphon projects offer advantages such as convenient construction and low cost. Inverted siphon technology has been widely adopted in my country, with numerous inverted siphon projects implemented to transport water resources through straight and inclined inverted siphon tunnels. In inverted siphon projects, needle-beam trolleys are commonly used for lining and pouring operations.

[0003] A search revealed that Chinese patent CN114810151B discloses a needle beam trolley, and this invention also discloses a needle beam trolley. The invention comprises a needle beam and a trolley, with the trolley traveling along the needle beam. The needle beam consists of multiple needle beam units, which are detachably connected. The trolley consists of multiple trolley units. During straight section construction, the needle beam units and trolley units are assembled into a whole for lining construction. During curved section construction, the trolley is disassembled into independent units, and the trolley units are moved to the needle beam units. Each needle beam unit is disassembled, and excess units are removed. Lining construction is carried out using the front needle beam unit and the trolley unit above it. After construction, demolding is performed. The assembly of each needle beam unit and trolley unit independently navigates curves. Furthermore, by designing the trolley unit to include multiple side formwork components to increase the clearance after demolding, the trolley units do not interfere with the tunnel wall when navigating curves. This significantly simplifies the construction process, reduces construction difficulty, improves construction efficiency, and shortens the construction cycle.

[0004] Alternatively, it could be a needle-beam type steel formwork trolley with publication number CN119957261A. This invention discloses a needle-beam type steel formwork trolley for the secondary lining construction of a full-circle water diversion tunnel, comprising: a needle-beam system composed of needle beams and formwork frames, a hydraulic system, a formwork system, and a traction system; the formwork system includes a top formwork and two side formworks along the tunnel longitudinal direction, with the two side formworks hinged to both ends of the top formwork; the top formwork is supported on the formwork frame, and the fan-shaped angle formed by the cross-section of the top formwork is 90 degrees; the side formworks are supported and connected to the formwork frame through multiple sets of hydraulic cylinders, with the ends of the two side formworks located at the junction of the secondary lining platform and the sidewall of the full-circle water diversion tunnel; the top formwork has two rows of top formwork loading holes located on both sides of the longitudinal centerline along the tunnel longitudinal direction, and each side formwork has one row of side formwork loading holes along the tunnel longitudinal direction, above the waistline, and multiple rows of venting holes along the tunnel longitudinal direction, below the waistline. This invention effectively solves a series of problems such as concrete venting, top voiding, trolley floating, and formwork cleaning, effectively improving construction quality and efficiency.

[0005] However, both of the above-mentioned schemes employ an integral formwork structure, which has inherent flaws in its construction process: the entire formwork can only be demolded and moved to the next section after one section has been poured and the concrete has reached its demolding strength, forming a single, non-intersecting linear operation mode. This intermittent construction method results in the trolleys and workers being idle for extended periods during the concrete curing of each section, leading to low equipment utilization and labor efficiency, severely restricting construction progress and becoming a key bottleneck affecting the overall project duration. Simultaneously, because the bottom formwork cannot be demolded separately in advance, construction workers miss the optimal time for initial concrete setting, making it difficult to perform timely and effective finishing, compaction, and defect repair on the bottom lining surface. This results in permanent quality defects such as porosity and pitting, affecting not only the structural appearance but also potentially damaging its flow performance and long-term durability. Furthermore, this rigid construction sequence lacks flexibility; if any link is blocked, the entire construction chain comes to a standstill, exhibiting poor risk resistance and making it impossible to optimize resources to achieve parallel processing and shorten the overall project duration.

[0006] Therefore, this invention proposes a bottom mold detachable needle beam trolley. Summary of the Invention

[0007] Technical problems to be solved: The above-mentioned solution adopts an integral formwork structure, which has inherent defects in its construction process: it can only be demolded and moved to the next section after the concrete of one section has been poured as a whole and reached the demolding strength, forming a single, non-intersecting linear operation mode. This intermittent construction method results in the trolley and workers being idle for a long time during the concrete curing period of each section, with low equipment utilization and labor efficiency, which seriously restricts the construction progress and becomes a key bottleneck affecting the overall project duration. At the same time, because the bottom formwork cannot be demolded separately in advance, the construction workers miss the best time to treat the initial setting of the concrete, making it difficult to perform timely and effective finishing, compaction and defect repair on the bottom lining surface. This results in permanent quality defects such as air holes and pitting, which not only affect the appearance quality of the structure, but may also damage its flow performance and long-term durability. In addition, this rigid construction sequence lacks flexibility. Once a link is blocked, the entire construction chain comes to a standstill, with poor risk resistance, and it is impossible to optimize resources to achieve parallel operation of processes to shorten the overall project duration.

[0008] To address the shortcomings of existing technologies, this invention provides a bottom mold detachable needle beam trolley, thereby solving the technical problems mentioned in the background section.

[0009] To achieve the above objectives, the present invention provides the following technical solution: The bottom template detachable needle beam trolley includes a needle beam frame for receiving subsequent objects. A bottom template is set at the bottom of the needle beam frame, a first connecting plate is set above the bottom template, a first hydraulic cylinder is set above the first connecting plate, a columnar object is rotatably set at the other end of the first hydraulic cylinder, and a rotating block is set at the other end of the columnar object. A connecting seat is set above the first connecting plate. The connecting seat is triangular in shape, and a second hydraulic cylinder is set at the tip of the connecting seat. A beam frame bottom structure is slidably set at the bottom of the needle beam frame. The other end of the second hydraulic cylinder is fixedly connected to the beam frame bottom structure, and the first connecting plate and the first hydraulic cylinder are also rotatably connected.

[0010] In one possible implementation, the needle beam frame is six meters long, made of low-alloy high-strength structural steel, and consists of five needle beam frames arranged in parallel.

[0011] In one possible implementation, the outer side of the rotating block is arc-shaped, the overall shape of the rotating block is trapezoidal, and the two sides of the bottom template are also inclined. The rotating block is hinged to both sides of the bottom template.

[0012] In one possible implementation, a first winch is installed on the needle beam frame, and a first traction wheel is installed on the same side of the needle beam frame. The first traction wheel is fixed to the bottom structure of the beam frame, and a middle support leg is provided under the needle beam frame that moves synchronously with the bottom template structure.

[0013] In one possible implementation, an electric telescopic rod is provided on the side wall of the needle beam frame, and a first fixed column is provided at the other end of the electric telescopic rod. A side template is provided at the other end of the first fixed column, and the two are connected by a pin and threaded detachable method. A top template is hinged to the upper end of the side template. A needle beam top structure is slidably provided on the top of the needle beam frame. A second winch is provided on the top of the needle beam frame. A second traction wheel is provided on the same side of the needle beam frame as the second winch. The second traction wheel is provided on the side wall of the top structure of the beam frame.

[0014] In one possible implementation, the bottom module, top template, and side template are all arc-shaped. A second connecting plate is provided inside the top template and is fixedly connected to the upper structure of the beam frame. A third hydraulic cylinder is provided on the side wall of the needle beam frame and is rotatably connected to the needle beam frame. A second fixing column is provided on the inner wall of the side template and is rotatably connected to the other end of the third hydraulic cylinder and the second fixing column is located below the first fixing column.

[0015] In one possible implementation, the first winch and the second winch are respectively located at the bottom and top of the tail of the needle beam frame, and side beams are provided at both ends of the needle beam frame.

[0016] In one possible implementation, wheels are provided at the connection points between the bottom mechanism of the beam frame and the top structure of the beam frame and the needle beam frame.

[0017] Beneficial effects compared to existing technologies: 1. In this solution, by designing the side and top formwork as an integrated linkage structure and integrating electric telescopic rods and multiple sets of hydraulic cylinders for coordinated control, efficient and precise demolding and rapid positioning of the side and top formwork are achieved. After the concrete reaches its strength, the electric telescopic rods are first released, and then the hydraulic cylinders retract to drive the side formwork to flip inwards for demolding. The hinged connection allows the side formwork to naturally retract to both sides of the needle beam. The top formwork is then moved to the next section by a winch and aligned with the already positioned bottom formwork to form a closed lining ring. This integrated movement and positioning method greatly shortens the transfer time, supports parallel operation of the bottom and side / top formwork, enables multi-section cyclic pouring, significantly improves construction continuity and trolley utilization, and is suitable for concrete lining construction of various circular and quasi-circular tunnels. 2. In this scheme, by designing the bottom formwork as an independently detachable and horizontally movable structure, early demolding and exposure of the bottom concrete are achieved. This provides construction personnel with ample working space for concrete surface finishing. The bottom formwork is lifted by hydraulic cylinders and pulled by a winch, allowing it to move smoothly forward on the track, thoroughly exposing the initially set bottom concrete surface. Construction personnel can then enter the underside of the trolley for fine finishing and defect repair, significantly improving the concrete surface quality and overall lining density. Simultaneously, this structure supports the independent movement of the bottom formwork to the next section for positioning and pouring, enabling segmented cyclical construction of the bottom section without affecting the upper concrete work, thereby greatly improving overall construction efficiency. This is particularly suitable for long-distance, large-section tunnel projects. 3. In this solution, by installing a middle support leg structure at the bottom of the needle beam that can move synchronously with the bottom formwork, and equipping it with a lifting cylinder to adjust the support height in real time, the problem of the needle beam deflecting due to suspension after the bottom formwork is removed is effectively solved. Under the linkage mechanism between the middle support leg and the bottom formwork, the middle support leg is ensured to move synchronously and lift the support when the bottom formwork moves forward, keeping the needle beam in a stable state with multi-point stress. This structure significantly enhances the rigidity and flexural strength of the needle beam, ensuring that the formwork system does not deform or shift during the pouring of the upper concrete, thereby improving the accuracy of the lining section and construction safety, while also extending the service life of the equipment. Attached Figure Description

[0018] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0019] Figure 1 This is the left view of the present invention; Figure 2 This is a schematic diagram of the bottom structure of the beam frame of the present invention; Figure 3 This is a front view of the present invention; Figure 4 This is a schematic diagram of the bottom template separation structure of the present invention; Figure 5 This is a schematic diagram of the tunnel construction of the present invention.

[0020] Legend: 11. Needle beam frame; 12. Bottom template; 13. First connecting plate; 14. First hydraulic cylinder; 15. Column; 16. Rotating block; 17. Connecting seat; 18. Second hydraulic cylinder; 19. Beam frame bottom structure; 21. First winch; 22. First traction wheel; 23. Middle support leg; 24. Electric telescopic rod; 25. First fixed column; 26. Side template; 27. Top template; 28. Beam frame top structure; 29. ​​Second winch; 31. Second traction wheel; 32. Second connecting plate; 33. Third hydraulic cylinder; 34. Side beam; 35. Wheel. Detailed Implementation

[0021] Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention can also be implemented in various different forms, and therefore the present invention is not limited to the embodiments described below. In addition, for the purpose of more clearly describing the present invention, parts not connected to the invention will be omitted from the drawings. In the description of this invention, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" 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.

[0022] 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 technical features indicated. 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, "a plurality of" means two or more, unless otherwise explicitly specified.

[0023] 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 part; they can refer to a mechanical connection, an electrical connection, or a communication 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. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0024] In this invention, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples. The technical solution in this application addresses the inherent flaws in the construction process of the aforementioned integrated formwork structure. It requires that each section be poured and the concrete reach its demolding strength before demolding and moving to the next section, creating a single, non-intersecting linear operation. This intermittent construction method results in prolonged idleness of the formwork and workers during the concrete curing period of each section, leading to low equipment utilization and labor efficiency, severely restricting construction progress and becoming a key bottleneck affecting the overall project duration. Furthermore, because the bottom formwork cannot be demolded separately in advance, workers miss the optimal time for initial concrete setting, making it difficult to perform timely and effective surface finishing and compaction, and defect repair. This results in permanent defects such as porosity and pitting, affecting not only the structural appearance but also potentially damaging its flow performance and long-term durability. In addition, this rigid construction sequence lacks flexibility; if any link is blocked, the entire construction chain stagnates, exhibiting poor risk resistance and failing to address the issue of parallel processing through resource optimization to shorten the overall project duration. The overall approach is as follows: Example: Please refer to Figures 1 to 5 As shown in the figure, this embodiment introduces the specific structure of the bottom formwork detachable needle beam trolley, including a needle beam frame 11 for receiving subsequent objects. The needle beam frame 11 is six meters long and there are five needle beam frames 11, which divide the needle beam frame 11 into five compartments, which are arranged in parallel. The needle beam frame 11, as the core load-bearing and stress-bearing structure, is made of low alloy high-strength structural steel. When it is needed, the entire needle beam trolley is assembled, and concrete is poured for the bottom formwork 12. When the concrete on the bottom formwork 12 has reached the specified strength, the first hydraulic cylinder 14 of the first connecting plate 13 on the bottom formwork 12 is activated. The first hydraulic cylinder 14 will drive the rotating block 16 to flip from both sides to the middle. Then the second hydraulic cylinder 18 is activated, which will drive the bottom formwork 12 to move from bottom to top. At this time, the bottom formwork 12 will move away from the bottom concrete block, completing the function of demolding the bottom concrete.

[0025] The bottom of the bottom module is arc-shaped, and a first connecting plate 13 parallel to the arc shape is set inside it. This serves two purposes: first, to increase the overall strength of the bottom template 12, and second, to provide space for the bottom template 12 to connect with the needle beam frame 11. A connecting seat 17 is set above the first connecting plate 13. The connecting seat 17 is triangular, and the tip of the triangle of the connecting seat 17 is rotatably mounted to the second hydraulic cylinder 18. The other end of the second hydraulic cylinder 18 and the connecting seat 17 is fixedly connected to the lower structure of the beam frame. The first connecting plate 13 and the first hydraulic cylinder 14 are also rotatably mounted to prevent the first hydraulic cylinder 14 from interfering with its movement trajectory during movement, which would prevent the device from completing normal retraction.

[0026] A protruding column 15 is provided above the rotating block 16. The column 15 is rotatably mounted with the first oil cylinder 14. If it is directly mounted above the rotating block 16, the rotation angle may be too large and it may get stuck above the rotating block 16. The first oil cylinder 14 may be squeezed, which may cause damage to the device.

[0027] The outer side of the rotating block 16 is arc-shaped, just like the bottom template 12. The bottom of the rotating block 16 is shorter and the arc is not obvious, but the overall shape of the rotating block 16 is similar to a trapezoid. The two sides of the bottom template 12 are also inclined. The rotating blocks 16 are respectively set on both sides of the bottom module, and the rotating blocks 16 are hinged to the bottom template 12. When the rotating blocks 16 move from both sides to the middle, the inclined surface of the rotating blocks 16 will contact the inclined surface of the bottom template 12, and there will be no problem of motion interference. In addition, the two connecting seats 17 are located between the two first oil cylinders 14 and there is a large distance between them. Therefore, when the first oil cylinder 14 retracts and reverses, there will be no interference between the connecting seats 17 and the first oil cylinder 14.

[0028] After the bottom module separates from the bottom concrete, the first winch 21 on the needle beam frame 11 is started to drive the first traction wheel 22 to move. The first traction wheel 22 then drives the lower structure of the beam frame to move. The lower structure of the beam frame drives the bottom template 12 to the next compartment. After the bottom template 12 moves to the next compartment, the initially set concrete surface at the bottom is exposed, providing enough space for construction workers to perform concrete surface finishing treatment, eliminating surface quality defects such as air holes and pitting formed during the pouring process. After positioning and adjustment, the bottom concrete can be poured separately. At this time, the bottom of the needle beam lacks the support of the bottom template 12 structure. To prevent the needle beam frame 11 from deflecting under the force of the concrete, a middle support leg 23 that moves synchronously with the bottom template 12 structure is provided under the needle beam. The support height is adjusted by lifting the fourth hydraulic cylinder.

[0029] When preparing to pour concrete for the sides and top, the electric telescopic rod 24 will fix and position the side formwork 26. Under the pulling of the third hydraulic cylinder 33 and the electric telescopic rod 24, the side formwork 26 will be stably fixed above the bottom set concrete inner wall. Then, concrete will be poured again onto the top formwork 27 and the side formwork 26. When the concrete poured into the top formwork 27 and the side formwork 26 reaches the specified strength, and it is time to demold the top formwork 27 and the side formwork 26, the electric telescopic rod 24 will be pulled from the side... The side template 26 is disassembled from the inner wall. At this time, the electric telescopic rod 24 will no longer fix the side template 26. The third hydraulic cylinder 33 is activated again. The retraction of the third hydraulic cylinder 33 will cause the side template 26 to move from both sides to the middle. At the same time, the third hydraulic cylinder 33 will also flip. Since the side template 26 is hinged to the top template 27, after the third hydraulic cylinder 33 retracts, the tail of the side template 26 will directly overlap the side wall of the needle beam frame 11. The side template 26 will be perfectly disassembled from the side-cured concrete.

[0030] After the side formwork detaches from the concrete surface, the support leg 23 is slowly retracted by the hydraulic cylinder. As the support leg retracts, the force supporting the top formwork 27 gradually weakens and disappears. Under its own weight, the top formwork 27 slowly detaches from the concrete surface until the side and top formswork are completely detached from the concrete. Then the hydraulic cylinder of the support leg 23 is extended to support the entire system.

[0031] At this point, the second winch 29 is started to drive the second traction wheel 31 to move. The second traction wheel 31 drives the upper structure of the beam frame to move, and the upper structure of the beam frame drives the top template 27 to move. The top template 27 and the side template 26 are hinged, so when the top template 27 moves, it will drive the side template 26 to move to the next compartment. At this time, the bottom template 12, the side template 26 and the top template 27 will be on the same plane again. After aligning with the bottom template 12 that has been positioned and fixed, a circular integral structure is formed. Concrete pouring can be carried out again on the sides and top. The above scheme is repeated and so on to complete the entire tunnel concrete pouring work.

[0032] The top template 27 and the side template 26 are also arc-shaped. The top template 27 has a second connecting plate 32 inside, which is fixed to the upper structure of the beam frame. This connection has the same effect as the first connection, thus increasing the overall strength of the top template 27. The arc-shaped inner wall of the side template 26 has a first fixing column 25, which is connected to the electric telescopic rod 24. This connection can be a detachable connection such as a pin or thread. The other end of the electric telescopic rod 24 is rotatably connected to the needle beam frame 11. At the same time, the side wall of the needle beam frame 11 is also equipped with a third hydraulic cylinder 33, which is also rotatably connected to the needle beam frame 11. The other end of the third hydraulic cylinder 33 is rotatably connected to the second fixing column. The second fixing column is also located on the arc-shaped inner wall of the side template 26, and it is located below the first fixing column 25. Similarly, the third hydraulic cylinder 33 is also located below the electric telescopic rod 24.

[0033] The first winch 21 and the second winch 29 are respectively located at the bottom and top of the tail of the needle beam frame 11, and the first traction wheel 22 and the second traction wheel 31 are respectively located on the side of the bottom structure 19 and the top structure 28 of the beam frame close to the first winch 21 and the second winch 29. Side beams 34 are provided at both ends of the needle beam frame 11 to facilitate workers to climb up and down to carry out pouring and other operations.

[0034] Wheels 35 are provided at the connection points between the bottom structure 19 and the top structure 28 of the beam frame and the needle beam frame 11. This will reduce the friction between the bottom structure 19 and the top structure 28 of the beam frame, reduce the degree of damage during operation, and increase the service life of the device.

[0035] The needle beam trolley disconnects the columns of the beam frame structure, sets the bottom formwork 12 as an independent structure, and sets the side formwork 26 and the top formwork as an integral structure. This allows the bottom and top concrete of the circular tunnel to be poured separately or poured as a whole.

[0036] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A bottom-mold detachable needle beam trolley, comprising a needle beam frame (11) for receiving subsequent objects, characterized in that, The bottom of the needle beam frame (11) is provided with a bottom template (12), and a first connecting plate (13) is provided above the bottom template. A first oil cylinder (14) is provided above the first connecting plate (13). A column (15) is rotatably provided at the other end of the first oil cylinder (14). A rotating block (16) is provided at the other end of the column (15). A connecting seat (17) is provided above the first connecting plate (13). The connecting seat (17) is triangular. A second oil cylinder (18) is provided at the tip of the connecting seat (17). A beam frame bottom structure (19) is slidably provided at the bottom of the needle beam frame (11). The other end of the second oil cylinder (18) is fixedly connected to the beam frame bottom structure (19). The first connecting plate (13) and the first oil cylinder (14) are also rotatably installed.

2. The bottom mold detachable needle beam trolley as described in claim 1, characterized in that, The needle beam frame (11) is six meters long and is made of low-alloy high-strength structural steel. There are five needle beam frames (11) in total, and they are arranged in parallel.

3. The bottom mold detachable needle beam trolley as described in claim 1, characterized in that, The outer side of the rotating block (16) is arc-shaped, the overall shape of the rotating block (16) is similar to a trapezoid, and the two sides of the bottom template (12) are also inclined. The rotating block (16) is hinged to both sides of the bottom template.

4. The bottom mold detachable needle beam trolley as described in claim 1, characterized in that, A first winch (21) is provided on the needle beam frame (11). A first traction wheel (22) is provided on the same side of the needle beam frame (11). The first traction wheel (22) is fixed to the bottom structure (19) of the beam frame. A middle support leg (23) is provided under the needle beam frame (11) and moves synchronously with the bottom template (12) structure.

5. The bottom mold detachable needle beam trolley as described in claim 1, characterized in that, An electric telescopic rod (24) is provided on the side wall of the needle beam frame (11). A first fixed column (25) is provided at the other end of the electric telescopic rod (24). A side template (26) is provided at the other end of the first fixed column (25). The templates are connected by a pin and threaded detachable method. A top template (27) is hinged to the upper end of the side template (26). A needle beam top structure (28) is slidably provided on the top of the needle beam frame (11). A second winch (29) is provided on the top of the needle beam frame (11). A second traction wheel (31) is provided on the same side of the needle beam frame (11). The second traction wheel (31) is provided on the side wall of the top structure (28) of the beam frame.

6. The bottom mold detachable needle beam trolley as described in claim 1, characterized in that, The bottom template, top template (27) and side template (26) are all arc-shaped. The top template (27) is equipped with a second connecting plate (32), which is fixed to the upper structure of the beam frame. The side wall of the needle beam frame (11) is equipped with a third oil cylinder (33), which is rotatably connected to the needle beam frame (11). The inner wall of the side template (26) is equipped with a second fixing column, and the other end of the third oil cylinder (33) is rotatably connected to the second fixing column. The second fixing column is located below the first fixing column (25).

7. The bottom mold detachable needle beam trolley as described in claim 1, characterized in that, The first winch (21) and the second winch (29) are respectively located at the bottom and top of the tail of the needle beam frame (11), and side beams (34) are provided at both ends of the needle beam frame (11).

8. The bottom mold detachable needle beam trolley as described in claim 1, characterized in that, Wheels (35) are provided at the connection points between the bottom structure and top structure of the beam frame (28) and the needle beam frame (11).

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