Manufacturing jig frame suitable for variable-diameter reinforcement cage of pile foundation

Abstract

The utility model relates to a manufacturing jig frame suitable for a variable-diameter reinforcement cage of a pile foundation, which comprises a base, a diameter adjusting plate is mounted on the base and provided with a plurality of positioning points, and the positioning points are arranged along the length direction of the diameter adjusting plate; one end of each supporting plate is detachably connected to the corresponding positioning point; and the inner diameters of the multiple arc-shaped clamp plates are different, and one of the multiple arc-shaped clamp plates is detachably connected with the other ends of the pair of supporting plates and used for being matched with reinforcement cages with different diameters. Due to the fact that the multiple positioning points are arranged in the length direction of the diameter adjusting plate, the position of the supporting plate in the diameter adjusting plate can be changed by connecting the different positioning points, at the moment, arc-shaped clamp plates with different inner diameters need to be replaced to be connected with the supporting plate, and therefore the supporting plate and the arc-shaped clamp plates which are detachably connected are used, and the supporting plate and the arc-shaped clamp plates are convenient to use. In this way, under the condition that the jig frame base is not replaced, different variable-diameter reinforcement cages can be manufactured.

Description

Technical Field

[0001] The utility model relates to the field of foundation construction, and particularly relates to a manufacturing jig suitable for a variable-diameter steel reinforcement cage of a pile foundation. Background Art

[0002] Steel reinforcement cages are widely used in the construction field, mainly playing the roles of tensile resistance, restricting the lateral deformation of concrete, and assisting in bearing pressure. During the construction of bridges, culverts or high-rise buildings, steel reinforcement cages with different diameters need to be manufactured according to different requirements. However, in the conventional manufacturing of variable-diameter steel reinforcement cages, a fixed-type jig is often used. When manufacturing steel reinforcement cages with multiple diameters, a matching jig needs to be made for each diameter of the steel reinforcement cage, and the number of types of jigs required is relatively large. Summary of the Utility Model

[0003] An embodiment of the utility model provides a manufacturing jig suitable for a variable-diameter steel reinforcement cage of a pile foundation to solve the problem in the related art that in the conventional manufacturing of variable-diameter steel reinforcement cages, a fixed-type jig is often used, and when manufacturing steel reinforcement cages with multiple diameters, a matching jig needs to be made for each diameter of the steel reinforcement cage, and the number of types of jigs required is relatively large.

[0004] In a first aspect, a manufacturing jig suitable for a variable-diameter steel reinforcement cage of a pile foundation is provided, which includes: a base, a diameter adjusting plate is installed on the base, the diameter adjusting plate is provided with a plurality of positioning points, and the plurality of positioning points are arranged along the length direction of the diameter adjusting plate; at least a pair of support plates, one end of the support plate is detachably connected to the positioning point; and a plurality of arc clamping plates, the inner diameters of the plurality of arc clamping plates are different, and the plurality of arc clamping plates are selectively and detachably connected to the other end of a pair of support plates for adapting to steel reinforcement cages with different diameters.

[0005] In some embodiments, there are multiple pairs of the support plates, the sizes of the multiple pairs of support plates are different, the multiple pairs of support plates are selectively connected to the corresponding positioning points, and different support plates cooperate with the corresponding arc clamping plates to adapt to steel reinforcement cages with different diameters.

[0006] In some embodiments, the positioning points are circular holes, at least two first connection holes are opened at one end of the support plate, and the support plate and the diameter adjusting plate are connected by bolts passing through the positioning points and the first connection holes; at least two second connection holes are opened at the other end of the support plate, and the arc clamping plate is correspondingly provided with the same number and size of third connection holes at the connection position with the support plate, and the support plate and the arc clamping plate are connected by bolts passing through the second connection holes and the third connection holes.

[0007] In some embodiments, the line connecting the two first connection holes and the line connecting the two second connection holes enclose a quadrilateral structure, where the length of the line connecting the two second connection holes is greater than the length of the line connecting the two first connection holes.

[0008] In some embodiments, the manufacturing jig further includes: a baffle, the baffle protruding upward from two long sides of the base; two plugging plates, the two plugging plates are respectively fixed at two ends of the baffle, and the two plugging plates are respectively limited at two ends of the diameter adjusting plate.

[0009] In some embodiments, a plurality of groups of limiting plates are connected to the upper surface of the base, and each group of limiting plates is clamped on opposite side surfaces of the diameter adjusting plate.

[0010] In some embodiments, the manufacturing jig further includes: a reinforcing plate, one end of the reinforcing plate is connected to the lowest point of the arc-shaped clamping plate, the other end is connected to the diameter adjusting plate, and the reinforcing plate vertically supports at the lowest point of the arc-shaped clamping plate.

[0011] In some embodiments, the reinforcing plate is provided with three through holes, the three through holes are connected to form a triangular structure, the reinforcing plate and the arc-shaped clamping plate are connected through one of the through holes, and the reinforcing plate and the diameter adjusting plate are connected through the other two through holes.

[0012] In some embodiments, each arc-shaped clamping plate is provided with a plurality of arc-shaped clamping grooves facing the center of the circle, the sizes of the plurality of arc-shaped clamping grooves are the same, and the distance between adjacent two arc-shaped clamping grooves is the same.

[0013] In some embodiments, the cross-section of the base is designed as a quadrilateral structure, a support is formed by protruding downward along the long side of the base; and at least two connecting steel bars are installed on the support, the two connecting steel bars respectively extend from the support on one side of the base to the support on the other side along the diagonal of the quadrilateral structure of the base, and the two connecting steel bars are used to contact the ground.

[0014] The beneficial effects brought by the technical solution provided by the present utility model include:

[0015] The embodiment of the present utility model provides a manufacturing jig applicable to a variable-diameter steel reinforcement cage for a pile foundation. Since a plurality of positioning points are arranged along the length direction of the diameter adjusting plate, the support plate can be connected to different positioning points in the diameter adjusting plate, and the distance between the two support plates can be changed by connecting different positioning points, so as to match arc-shaped clamping plates with different inner diameters and fix the arc-shaped clamping plates with different inner diameters on the diameter adjusting plate. Therefore, by using a detachable connection between the support plate and the arc-shaped clamping plate, different variable-diameter steel reinforcement cages can be manufactured without replacing the base of the jig. Description of the Drawings

[0016] To more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 The front view structural schematic diagram of the first size of the manufacturing jig for the present utility model embodiment;

[0018] Figure 2 The front view structural schematic diagram of the second size of the manufacturing jig for the present utility model embodiment;

[0019] Figure 3 The side view structural schematic diagram of the manufacturing jig for the present utility model embodiment;

[0020] Figure 4 The top view of the base provided by the present utility model embodiment

[0021] Figure 5 The side view of the base provided by the present utility model embodiment;

[0022] Figure 6 The front view of the diameter adjustment plate provided by the present utility model embodiment;

[0023] Figure 7 The front view of the support plate provided by the present utility model embodiment;

[0024] Figure 8 The front view of the arc clamping plate provided by the present utility model embodiment.

[0025] In the figure:

[0026] 1. Base; 11. Baffle; 12. Plug plate; 13. Limiting plate; 14. Support; 15. Connecting steel bar;

[0027] 2. Diameter adjustment plate; 21. Positioning point;

[0028] 3. Support plate; 31. First connection hole; 32. Second connection hole;

[0029] 4. Arc clamping plate; 41. Arc slot; 42. Third connection hole. Detailed implementation manners

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0031] The embodiment of the present utility model provides a manufacturing jig for a variable-diameter steel reinforcement cage suitable for pile foundations, which can solve the problem in the related art that in the conventional manufacturing of variable-diameter steel reinforcement cages, a fixed-type jig is often used. When manufacturing steel reinforcement cages of multiple diameters, a jig matching each diameter needs to be made, and the number of types of jigs required is relatively large.

[0032] See Figures 1 to 3 As shown, it is a manufacturing jig for a variable-diameter steel reinforcement cage suitable for pile foundations provided by the embodiment of the present utility model, which may include: a base 1, a diameter adjusting plate 2 is installed on the base 1, the diameter adjusting plate 2 is provided with a plurality of positioning points 21, and the plurality of positioning points 21 are arranged along the length direction of the diameter adjusting plate 2; the base 1 may be set to have a long side and a short side. At this time, the diameter adjusting plate 2 may be installed on the side surface of the long side of the base 1, or the diameter adjusting plate 2 may be installed on the upper surface of the long side of the base 1. Preferably, the connection method between the base 1 and the diameter adjusting plate 2 is welding. Among them, the positioning points 21 on the diameter adjusting plate 2 may be set in the shape of holes, or may be set in other forms such as short rods. At least a pair of support plates 3, one end of the support plate 3 is detachably connected to the positioning point 21, and the two support plates 3 in each pair of support plates 3 may have the same size. One end of the support plate 3 is provided with a structure matching the positioning point 21, so that the support plate 3 can be connected to the diameter adjusting plate 2 through the positioning point 21. And a plurality of arc-shaped clamping plates 4, the inner diameters of the plurality of arc-shaped clamping plates 4 are different, and the plurality of arc-shaped clamping plates 4 are alternatively detachably connected to the other end of a pair of support plates 3 for adapting to steel reinforcement cages of different diameters. Each arc-shaped clamping plate 4 has a different inner diameter, and each arc-shaped clamping plate 4 is detachably connected to the support plate 3; the corresponding arc-shaped clamping plate 4 can be selected according to the diameter of the steel reinforcement cage to be manufactured, so as to replace the matching support plate 3 according to the arc-shaped clamping plate 4 and select the connection position of the support plate 3 on the diameter adjusting plate 2. The materials for making the base 1, the diameter adjusting plate 2, the support plate 3, and the arc-shaped clamping plate 4 may be easily obtained steel, preferably Q235B steel, and the whole bodies of the base 1, the diameter adjusting plate 2, the support plate 3, and the arc-shaped clamping plate 4 may be subjected to anti-corrosion coating to enhance their durability.

[0033] The embodiment of the utility model provides a manufacturing jig for a variable-diameter steel reinforcement cage suitable for a pile foundation. Since a plurality of positioning points 21 are arranged along the length direction of the diameter adjusting plate 2, the support plate 3 can be connected to different positioning points 21 in the diameter adjusting plate 2. By connecting different positioning points 21, the support plate 3 can change its position in the diameter adjusting plate 2, that is, the distance between a pair of support plates 3 can be changed. When the distance between a pair of support plates 3 changes, the arc-shaped clamping plate 4 connected to the support plate 3 also needs to change accordingly, that is, replace the arc-shaped clamping plate 4 with different inner diameters. Therefore, by using the detachable connection between the support plate 3 and the arc-shaped clamping plate 4, it is possible to manufacture different variable-diameter steel reinforcement cages without replacing the jig base 1.

[0034] When replacing the arc-shaped clamping plate 4 with different inner diameters, it is also possible not to change the position of a pair of support plates 3 in the diameter adjusting plate 2. The arc-shaped clamping plates 4 with different inner diameters can be provided with fixing structures adapted to this pair of support plates 3, so that the arc-shaped clamping plates 4 with different inner diameters can be installed without adjusting the position of the support plate 3, realizing the manufacture of different variable-diameter steel reinforcement cages.

[0035] In some alternative embodiments, multiple pairs of the support plates 3 may be provided, and the sizes of the multiple pairs of support plates 3 are different, that is, the shapes of each pair of support plates 3 may also be different. The multiple pairs of support plates 3 are alternatively connected to the corresponding positioning points 21. The positioning points 21 to which the support plates 3 of different sizes are connected in the diameter adjusting plate 2 may also be different, and different support plates 3 can cooperate with the corresponding arc-shaped clamping plates 4 to adapt to reinforcement cages of different diameters. During the manufacturing process of a variable-diameter reinforcement cage, multiple manufacturing jigs are required, and an arc-shaped clamping plate 4 is installed on each manufacturing jig. During the manufacturing process of the reinforcement cage, an arc-shaped clamping plate 4 can be placed on each manufacturing jig according to the different diameter requirements that each section of the reinforcement cage may need, and the inner diameter sizes of the arc-shaped clamping plates 4 at different positions match the diameter requirements of the corresponding positions of the reinforcement cage. That is to say, an arc-shaped clamping plate 4 with a larger inner diameter is correspondingly arranged at the position where the diameter of the reinforcement cage to be manufactured is larger, and an arc-shaped clamping plate 4 with a smaller inner diameter is correspondingly arranged at the position where the diameter of the reinforcement cage to be manufactured is smaller. It should be noted that at this time, all the arc-shaped clamping plates 4 are placed to ensure that the reinforcement cages of different diameters manufactured are on the same axis. Therefore, it is necessary to select support plates 3 and arc-shaped clamping plates 4 with appropriate sizes for connection, and connect the other ends of the support plates 3 to the appropriate positioning points 21. Preferably, when a pair of support plates 3 are respectively connected to the diameter adjusting plate 2, they extend obliquely in the direction of approaching each other to meet the requirements for manufacturing a variable-diameter reinforcement cage. In other embodiments, after the manufacture of the previous variable-diameter reinforcement cage is completed, at this time, it is not necessary for the reinforcement cage to be on the same axis as the previously manufactured variable-diameter reinforcement cage. That is, some manufacturing jigs can, according to the size of the arc-shaped clamping plate 4 required now, without replacing the support plates 3, only change the positions of the positioning points 21 to which the support plates 3 are connected in the diameter adjusting plate 2 to achieve the manufacture of the reinforcement cage.

[0036] See Figure 6As shown, preferably, the positioning points 21 are round holes. The distribution pattern of the positioning points 21 in the diameter adjustment plate 2 can be symmetrically arranged on the left and right sides of the diameter adjustment plate 2, or asymmetrically distributed on both sides of the diameter adjustment plate 2. Even in some other cases, the positioning points 21 can be set at different heights in the diameter adjustment plate 2. The support plate 3 can select different positioning points 21 for connection according to different requirements. In this embodiment, the positioning points 21 are set as round holes and are symmetrically arranged along the diameter adjustment plate 2, with four points set on each side and the four points at the same height. At least two first connection holes 31 are provided at one end of the support plate 3, which can facilitate the stability of the connection between the support plate 3 and the diameter adjustment plate 2. The first connection holes 31 can also be three or more. The support plate 3 and the diameter adjustment plate 2 are connected by bolts passing through the positioning points 21 and the first connection holes 31. At this time, the connection method between the support plate 3 and the diameter adjustment plate 2 is to use bolts to pass through the first connection holes 31 provided on the support plate 3 respectively. Preferably, the bolts used here are hex head high-strength bolts because the self-weight of the fabricated tire rack is relatively heavy, and the hex head high-strength bolts can bear greater shear force and are convenient for removal. At least two second connection holes 32 are provided at the other end of the support plate 3. Corresponding to the connection part of the arc-shaped fixture plate 4 and the support plate 3, third connection holes 42 of the same number and size are provided. The support plate 3 and the arc-shaped fixture plate 4 are connected by bolts passing through the second connection holes 32 and the third connection holes 42. The connection bolts between the second connection holes 32 and the third connection holes 42 are also preferably hex head high-strength bolts.

[0037] See Figure 7 As shown, in some embodiments, the connection lines between the two first connection holes 31 and the two second connection holes 32 form a quadrilateral structure. Preferably, the support plate 3 is also set as a quadrilateral structure. The two first connection holes 31 and the two second connection holes 32 are respectively located at the four corners of the support plate 3 at this time. The length of the connection line between the two second connection holes 32 is greater than the length of the connection line between the two first connection holes 31, that is, the length of the support plate 3 connected to the arc-shaped fixture plate 4 is greater than the length of the support plate 3 connected to the diameter adjustment plate 2. This can enable the arc-shaped fixture plate 4 to have greater support force during the process of fabricating the steel reinforcement cage. When placing the steel bars on the arc-shaped fixture plate 4, the arc-shaped fixture plate 4 hardly deforms.

[0038] See Figure 4 and Figure 5As shown, in some alternative embodiments, the manufacturing jig further includes a baffle 11, which protrudes upward from two long sides of the base 1. In this embodiment, the baffle 11 and the base 1 are integrally formed, preferably the flange of an I-beam. In other embodiments, the base 1 and the baffle 11 can also be separate. The base 1 is made of a channel steel or a welded channel section, and then the base 1 and the baffle 11 are welded; two plug plates 12, which are respectively fixed to both ends of the baffle 11. The baffle 11 is arranged on two long sides of the base 1 and is connected to the plug plates 12. At this time, a groove is formed on the upper surface of the base 1, which increases the stability of the base 1 itself. And the two plug plates 12 are respectively limited at both ends of the diameter adjustment plate 2. The arrangement of the plug plates 12 can limit the diameter adjustment plate 2. At this time, the diameter adjustment plate 2 can be in contact with the plug plates 12 or not in contact with them.

[0039] See Figure 4 and Figure 5 As shown, in some alternative embodiments, a plurality of groups of limit plates 13 are connected to the upper surface of the base 1. Each group of limit plates 13 is clamped on opposite side surfaces of the diameter adjustment plate 2. In this embodiment, three groups of limit plates 13 are provided, and each group of limit plates 13 is symmetrically arranged on both side surfaces of the diameter adjustment plate 2 to clamp the diameter adjustment plate 2; the limit plates 13 on one side of the diameter adjustment plate 2 evenly divide the long side of the base 1 into three parts, and the end of the limit plate 13 away from the diameter adjustment plate 2 can be connected to the baffle 11 or not connected. The arrangement of the limit plates 13 can not only limit the diameter adjustment plate 2 but also play a certain supporting role for the diameter adjustment plate 2.

[0040] In some alternative embodiments, the manufacturing jig further includes a reinforcing plate. One end of the reinforcing plate is connected to the lowest point of the arc clamping plate 4, and the other end is connected to the diameter adjustment plate 2. And the reinforcing plate vertically supports at the lowest point of the arc clamping plate 4. At this time, the reinforcing plate is arranged perpendicular to the diameter adjustment plate 2. When the diameter of the steel reinforcement cage to be processed is relatively large, the inner diameter of the arc clamping plate 4 used is also relatively large and the mass is also relatively large. The reinforcing plate being perpendicular to the diameter adjustment plate 2, that is, perpendicular to the base 1, can give an upward supporting force to the arc clamping plate 4 to make it more stable.

[0041] Preferably, the reinforcing plate is provided with three through holes, and the three through holes are connected to form a triangular structure. The reinforcing plate is connected to the arc-shaped clamping plate 4 through one of the through holes, and the reinforcing plate is connected to the diameter adjusting plate 2 through the other two through holes. At this time, the arc-shaped clamping plate 4 and the diameter adjusting plate 2 are also provided with corresponding holes for connection with the reinforcing plate. The connection method here can be bolt connection. A triangle has stability, with the characteristics of firmness, steadiness, and pressure resistance. At this time, the reinforcing plate can also be set into a triangular structure, and each through hole is located at the three corners of the triangle, further providing a supporting force to the arc-shaped clamping plate 4 to make it more stable.

[0042] See Figure 8 As shown, each arc-shaped clamping plate 4 is provided with a plurality of arc-shaped grooves 41 facing the center of the circle. The sizes of the plurality of arc-shaped grooves 41 are the same. The size of each steel bar in a steel cage needs to be the same. The same size of the arc-shaped grooves 41 enables the same-sized steel bars to be clamped during the manufacturing process of the steel cage, and the distance between adjacent two arc-shaped grooves 41 is the same. The same distance enables the distance between each steel bar in the completed steel cage to be the same.

[0043] In this embodiment, the base 1 is designed as a quadrilateral structure, and a support 14 is formed by protruding downward along the long side of the base 1. Here, it is preferably a regular quadrilateral structure, which can appropriately reduce the floor area. The base 1 protrudes downward to form the support 14, that is, the manufacturing jig is supported by the support 14 at this time. And at least two connecting steel bars 15 are installed on the support 14. The two connecting steel bars 15 respectively extend from the support 14 on one side of the base 1 to the support 14 on the other side along the diagonal of the quadrilateral structure of the base 1. The connection method here is preferably welding. The two connecting steel bars 15 are used to contact the ground. At this time, the two connecting steel bars 15 are cross-set, and the end points of each connecting steel bar 15 are set at the vertices of the support 14 and the parts in contact with the ground. Because the self-weight of the manufacturing jig itself is relatively large, setting the support 14 to contact the ground forms a cavity between the base 1 and the ground, which can effectively reduce the use of materials. The two cross-set connecting steel bars 15 can also increase the friction with the ground, so that the manufacturing jig will not shake. When the jig needs to be moved later, the weld connecting the support 14 and the two connecting steel bars 15 can be removed to achieve this.

[0044] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. Unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0045] It should be noted that in the present utility model, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0046] The above are only specific embodiments of the present utility model, enabling those skilled in the art to understand or implement the present utility model. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features claimed herein.

Claims

1. A manufacturing frame suitable for a variable diameter steel cage of a pile foundation, characterized in that: It includes: A base (1), the base (1) being equipped with a diameter adjustment plate (2), the diameter adjustment plate (2) being provided with a plurality of positioning points (21), the plurality of positioning points (21) being arranged along the length direction of the diameter adjustment plate (2); at least one pair of support plates (3), one end of each support plate (3) being detachably connected to the positioning point (21); And a plurality of arc-shaped fixture plates (4), wherein the inner diameters of the plurality of arc-shaped fixture plates (4) are different, and one of the plurality of arc-shaped fixture plates (4) is detachably connected to the other end of a pair of support plates (3) to adapt to steel cages of different diameters.

2. The manufacturing frame for the variable diameter steel cage of pile foundation according to claim 1, characterized in that: The support plates (3) are provided in a plurality of pairs, and the sizes of the plurality of pairs of support plates (3) are different. The plurality of pairs of support plates (3) are selectively connected to corresponding positioning points (21), and different support plates (3) cooperate with corresponding arc-shaped clamping plates (4) to adapt to steel cages with different diameters.

3. The manufacturing frame for the variable diameter steel cage of pile foundation according to claim 1, characterized in that: The positioning point (21) is a circular hole, one end of the support plate (3) is provided with at least two first connection holes (31), and the support plate (3) and the diameter adjustment plate (2) are connected by bolts passing through the positioning point (21) and the first connection holes (31); The other end of the support plate (3) is provided with at least two second connection holes (32), and the connection between the arc-shaped fixture plate (4) and the support plate (3) is correspondingly provided with third connection holes (42) of the same number and size, and the support plate (3) and the arc-shaped fixture plate (4) are connected by bolts passing through the second connection holes (32) and the third connection holes (42).

4. The manufacturing frame for the variable diameter steel cage of pile foundation as claimed in claim 3, characterized in that: The connection line between the two first connection holes (31) and the two second connection holes (32) forms a quadrilateral structure, wherein the length of the connection line between the two second connection holes (32) is greater than the length of the connection line between the two first connection holes (31).

5. The manufacturing frame for the variable diameter steel cage of pile foundation according to claim 1, characterized in that: It also includes: a baffle (11), the baffle (11) protruding upward from two long sides of the base (1); Two plugging plates (12), the two plugging plates (12) are respectively fixed at two ends of the baffle plate (11), and the two plugging plates (12) are respectively limited at two ends of the diameter adjustment plate (2).

6. The manufacturing frame for the variable diameter steel cage of pile foundation according to claim 5, characterized in that: The upper surface of the base (1) is connected to a plurality of groups of limit plates (13), and each group of the limit plates (13) is clamped on two opposite side surfaces of the diameter adjustment plate (2).

7. The manufacturing frame for the variable diameter steel cage of pile foundation according to claim 1, characterized in that: It also includes: A reinforcing plate, one end of which is connected to the lowest point of the arc-shaped fixture plate (4), and the other end of which is connected to the diameter adjustment plate (2), and the reinforcing plate is vertically supported at the lowest point of the arc-shaped fixture plate (4).

8. The manufacturing cradle for variable diameter steel cage of pile foundation according to claim 7, characterized in that: The reinforcing plate is provided with three through holes, and the three through holes are connected to form a triangular structure. The reinforcing plate is connected to the arc-shaped clamping plate (4) through one of the through holes, and the reinforcing plate is connected to the diameter adjustment plate (2) through the other two through holes.

9. The manufacturing frame for variable diameter steel cage of pile foundation according to claim 1, characterized in that: Each of the arc-shaped fixture plates (4) is provided with a plurality of arc-shaped slots (41) towards the center of the circle, the plurality of arc-shaped slots (41) have the same size, and the spacing between two adjacent arc-shaped slots (41) is the same.

10. The manufacturing frame for variable diameter steel cage of pile foundation according to claim 1, characterized in that: The cross section of the base (1) is designed to be a quadrilateral structure, and a support (14) is formed by protruding downward along the long side of the base (1); Furthermore, the support (14) is installed with at least two connecting steel bars (15), and the two connecting steel bars (15) respectively extend from the support (14) on one side of the base (1) to the support (14) on the other side along the diagonal of the quadrilateral structure of the base (1), and the two connecting steel bars (15) are used to contact the ground.

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