An inner mold of a caisson

Abstract

The present invention discloses an inner mold of a caisson, comprising two longitudinal and transverse inner molds, an inner frame, a steel bottom support platform and four chamfering mechanisms; the two longitudinal and transverse inner molds each comprise a panel, a plurality of channel steel horizontal ribs fixed at intervals on the inner side of the panel and a vertical truss connected to the inner side of the plurality of channel steel horizontal ribs; the inner frame is connected to the vertical trusses of the two longitudinal and transverse inner molds respectively through an adjusting mechanism. The two ends of the panels of the two longitudinal inner molds are each connected to a longitudinal chamfering panel, and an edge-sealing channel steel is fixed to the outer end of the inner side of each longitudinal chamfering panel; the two ends of the two transverse inner molds are each connected to a chamfering template, and the chamfering template comprises a chamfering panel, a plurality of channel steel chamfering ribs and an edge-sealing steel plate; the four chamfering mechanisms are arranged one by one between the two ends of the two longitudinal and transverse inner molds; each chamfering mechanism comprises a chamfering frame, an opening and closing rotating component and a slurry-stopping rubber strip. The present invention can greatly improve the chamfering appearance quality of the caisson.

Description

Technical Field

[0001] The invention relates to an inner mould of a caisson. Background Art

[0002] Caisson is a commonly used structure in water transport engineering. It is widely used in dock and breakwater construction due to its strong and durable structure, good integrity, strong adaptability to load changes, and fast construction speed. As the main structure of the gravity dock, the caisson is relatively high, so the caisson is made by layered prefabrication.

[0003] During the manufacturing process of the caisson, it is necessary to separate several compartments in the caisson (see Figure 1a and Figure 1b ) to prevent water from entering the entire caisson after the caisson shell is damaged, so several inner molds need to be set in the caisson to achieve the construction of several compartments. The four corners of each compartment of the caisson have 45° chamfers.

[0004] The inner mold of the caisson adopts an integral core-pulling process, and each inner mold includes two longitudinal inner molds 11, two transverse inner molds 12, an inner frame 2 and a steel bottom supporting platform; the two longitudinal inner molds 11 and the two transverse inner molds 12 each include a panel 1A, a horizontal rib 1B fixed on the inner side of the panel 1A, and a vertical truss 1C fixed on the inner side of the horizontal rib 1B; the panel 1A is made of a 6mm thick steel plate; the horizontal rib 1B is made of No. 6.3 channel steel; the inner frame 2 is welded to the steel bottom supporting platform as a whole, the two longitudinal inner molds 11 and the two transverse inner molds 12 are both placed on the steel bottom supporting platform, and are respectively connected and fixed to the inner frame 2 by two-way adjusting bolts 20. Both ends of the two longitudinal inner formworks 11 and both ends of the two transverse inner formworks 12 are connected with a section of chamfered formwork, and each section of chamfered formwork also includes a chamfered panel 1D and a chamfered rib 1E fixed on the inner side of the chamfered panel. The chamfered panel 1D is also a 6mm thick steel plate; the chamfered rib 1E is also a 6.3 channel steel; the chamfered formworks at both ends of the two longitudinal inner formworks 11 and the chamfered formworks at both ends of the two transverse inner formworks 12 are connected by a 6mm thick steel gate plate 4, and a number of hooks 40 are connected to the middle of the inner side of the steel gate plate 4 at intervals along the length direction. When the caisson is prefabricated, four steel gate plates 4 with a number of hooks 40 are hung one by one between the chamfered panels 1D at both ends of the two longitudinal inner formworks 11 and the chamfered panels 1D at both ends of the two transverse inner formworks 12, and a number of wooden blocks 5 are inserted one by one between the several hooks 40 and the inner side of the chamfered rib 1E at both ends of the transverse inner formworks 12 (see Figure 2a and Figure 2b ). This chamfered structure will produce the following defects:

[0005] ① The steel gate is hung between the chamfered sections at both ends of each two inner templates. The position is different each time, which will cause the steel gate of the chamfered section of the upper layer to not match the position of the chamfered section of the lower layer that has been poured, resulting in gaps and a large amount of slurry leakage;

[0006] ② When cleaning concrete slag at the steel gate, it is necessary to separate the steel gate from the chamfered panels on both sides to facilitate cleaning. Since the length of the steel gate is usually about 4 meters (consistent with the height of the inner mold), it is difficult to directly take out the inner mold for cleaning (even so, it is very time-consuming and labor-intensive, and requires the assistance of a crane). Cleaning directly on the inner mold is difficult to clean, and even workers are unwilling to clean;

[0007] ③ As the steel gate plate is long and has weak rigidity, it is easy to deform after long-term use, and the deformation will further lead to leakage of grout at the chamfer, which will have a very adverse impact on the quality control of the caisson. Summary of the invention

[0008] The purpose of the present invention is to overcome the defects of the prior art and provide an inner mold of a caisson, which can improve the chamfer appearance quality of the caisson and greatly improve the installation and removal efficiency of the inner mold.

[0009] The object of the present invention is achieved as follows: an inner mold of a caisson comprises two longitudinal inner molds, two transverse inner molds, an inner frame, a steel bottom support platform and four chamfering mechanisms; the two longitudinal inner molds and the two transverse inner molds each comprise a panel, a plurality of channel steel horizontal ribs fixed at intervals on the inner side of the panel and a vertical truss connected to the inner side of the plurality of channel steel horizontal ribs; the inner frame is respectively connected to the vertical trusses of the two longitudinal inner molds and the vertical trusses of the two transverse inner molds through an adjusting mechanism; wherein,

[0010] The two ends of the panels of the two longitudinal inner formworks are respectively connected to a longitudinal chamfered panel, and an edge-sealed channel steel is fixed to the outer end of the inner side surface of the longitudinal chamfered panel;

[0011] The two ends of the two transverse inner templates are respectively connected to a chamfered template, which includes a chamfered panel, a plurality of channel steel chamfered ribs fixed at intervals on the inner side of the chamfered panel, and an edge-sealing steel plate fixed to the outer ends of the plurality of channel steel chamfered ribs;

[0012] Four chamfering mechanisms are correspondingly arranged between the two ends of the two longitudinal inner templates and the two ends of the two transverse inner templates; each chamfering mechanism includes a chamfering frame, an opening and closing rotating component and a slurry-stopping rubber strip; the length of the chamfering frame is the same as the length of the longitudinal inner template and the transverse inner template, and the cross-section of the chamfering frame is a pentagonal frame with three right inner angles and includes a chamfered channel steel back to back with the edge sealing channel steel, an outer chamfered panel with an inner end connected to the outer end of the outer waist of the chamfered channel steel, an inner chamfered panel with an inner end fixed to the outer end of the inner waist of the chamfered channel steel, a chamfered inclined panel with an upper end connected to the outer end of the outer chamfered panel, and a chamfered straight panel connected between the lower end of the chamfered inclined panel and the outer end of the inner chamfered panel; the opening and closing rotating component is composed of a plurality of groups of hinge mechanisms arranged at intervals between the edge sealing channel steel and the chamfered channel steel; each group of hinge mechanisms includes a first shaft sleeve, a second ... A sleeve, a third sleeve and a hinge shaft; the first sleeve and the third sleeve are coaxially fixed at the intersection of the leg and the inner waist of the edge banding channel steel, the second sleeve is fixed on the outer surface of the leg and the inner waist of the chamfered channel steel of the chamfered frame and is coaxially located between the first sleeve and the third sleeve; the hinge shaft is rotatably inserted into the inner hole of the first sleeve, the inner hole of the second sleeve and the inner hole of the third sleeve, so that the chamfer frame can be rotatably connected to the edge banding channel steel; the length of the stop slurry rubber strip is the same as the length of the chamfer frame and the cross-section is an isosceles right triangle, a plurality of positioning grooves are arranged at intervals along the length direction in the middle part of the inclined surface of the stop slurry rubber strip, a right-angled surface of the stop slurry rubber strip opposite to the edge banding steel plate is tightly attached to the outer side surface of the edge banding steel plate of the transverse inner template and is fixed to the edge banding steel plate by drilling a self-tapping screw in each positioning groove.

[0013] The inner mold of the caisson mentioned above, wherein each chamfering mechanism also includes a locking channel steel fixed between the inner side surface of the chamfering rib of the transverse inner mold and the vertical truss of the transverse inner mold, and a plurality of wooden blocks embedded at intervals between the locking channel steel and the intersection of the inner chamfered panel and the chamfered straight panel of the chamfered frame.

[0014] The inner mold of the caisson mentioned above, wherein a plurality of nuts are welded on the inner side surface of the edge-sealed steel plate in one-to-one correspondence with a plurality of self-tapping screws.

[0015] The inner mold of the caisson mentioned above, wherein the inner frame includes a rectangular top frame, four columns, four upper horizontal longitudinal connecting rods, four upper horizontal transverse connecting rods, four lower horizontal longitudinal connecting rods and four lower horizontal transverse connecting rods; the top ends of the four columns are connected to the four corners of the rectangular top frame one by one, and the bottom ends of the four columns are welded and fixed on the steel bottom supporting platform; the four upper horizontal longitudinal connecting rods are connected to the tops of the four columns one by one; the four upper horizontal transverse connecting rods are connected to the tops of the four columns one by one; the four lower horizontal longitudinal connecting rods are connected to the four corners of the rectangular top frame one by one Connected to the lower part of the four columns; the four lower horizontal transverse connecting rods are connected to the lower part of the four columns one by one; the adjusting mechanism includes sixteen two-way adjusting bolts, which are arranged one by one between the four upper horizontal longitudinal connecting rods and the hangers of the vertical trusses of the two longitudinal inner templates, between the four lower horizontal longitudinal connecting rods and the lower parts of the vertical trusses of the two longitudinal inner templates, between the four upper horizontal transverse connecting rods and the upper parts of the vertical trusses of the two transverse inner templates, and between the four lower horizontal transverse connecting rods and the lower parts of the vertical trusses of the two transverse inner templates.

[0016] The inner mold of the caisson of the present invention has the following characteristics:

[0017] 1. The chamfered frames rotatably connected to the two ends of the longitudinal inner template and the stop-slurry rubber strips fixed to the two ends of the transverse inner template can cooperate with each other, which can not only ensure that the chamfered frames can fit in place with the stop-slurry rubber strips each time, but also quickly realize the installation and removal of the inner mold, greatly improving the installation and removal efficiency of the inner mold. Each installation and removal of the inner mold can save at least one man-day;

[0018] 2. The chamfered frame is made of chamfered channel steel, outer chamfered panel 42, inner chamfered panel 43, chamfered inclined panel 44 and chamfered straight panel 45 to form a pentagonal frame structure with three right inner angles. Compared with the steel gate plate in the prior art, it not only has enhanced rigidity, but is also not easily deformed after long-term use;

[0019] 3. As a part of the chamfering mechanism, the slurry-stopping rubber strip has a strict slurry-stopping function, which effectively improves the chamfering appearance quality of the caisson. Even if a small amount of concrete slag penetrates, it can be cleaned immediately after demolding without the cooperation of a crane. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1a is an axial section of the caisson;

[0021] Figure 1b This is a top view of the caisson;

[0022] Figure 2a is a plan view of the inner mold of a caisson of the prior art;

[0023] Figure 2b yes Figure 2a Enlarged view of the middle P site;

[0024] Figure 3 is a plan view of the inner mold of the caisson of the present invention;

[0025] Figure 4 yes Figure 3 AA view in the figure;

[0026] Figure 5 yes Figure 3 Enlarged view of the middle Q area;

[0027] Figure 6 It is a schematic structural diagram of the opening and closing rotating component in the inner mold of the caisson of the present invention;

[0028] Figure 7a It is a schematic structural diagram of the slurry-stopping rubber strip in the inner mold of the caisson of the present invention;

[0029] Figure 7b yes Figure 7a BB view in the figure;

[0030] Figure 8 It is a plan view of the four chamfering mechanisms in the inner mold of the caisson of the present invention when they are opened. DETAILED DESCRIPTION

[0031] The present invention will be further described below in conjunction with the accompanying drawings.

[0032] See also Figures 3 to 8 The inner mold of the caisson of the present invention includes two longitudinal inner molds 11, two transverse inner molds 12, an inner frame 2, a steel bottom supporting platform 3 and four chamfering mechanisms 4A.

[0033] The two longitudinal inner formworks 11 and the two transverse inner formworks 12 each include a panel 1A, a plurality of channel steel horizontal ribs 1B fixed at intervals on the inner side of the panel 1A, and a vertical truss 1C connected to the inner side of the plurality of channel steel horizontal ribs 1B;

[0034] Two ends of the panels 1A of the two longitudinal inner formworks 11 are respectively connected to a longitudinal chamfered panel 13 , and an edge-sealing channel steel 14 is fixed to the outer end of the inner side surface of the longitudinal chamfered panel 13 .

[0035] The two ends of the two transverse inner templates 12 are respectively connected to a chamfer template 15, which includes a chamfered panel 1D, a plurality of channel steel chamfered ribs 1E fixed at intervals on the inner side of the chamfered panel 1D, and an edge-sealing steel plate 1F fixed to the outer ends of the plurality of channel steel chamfered ribs 1E.

[0036] The inner frame 2 is connected to the vertical trusses 1C of the two longitudinal inner templates 11 and the vertical trusses 1C of the two transverse inner templates 12 respectively through the adjustment mechanism; the inner frame 2 includes a rectangular top frame 21, four columns 22, four upper horizontal longitudinal connecting rods 23, four upper horizontal transverse connecting rods 24, four lower horizontal longitudinal connecting rods 25 and four lower horizontal transverse connecting rods 26; the top ends of the four columns 22 are connected to the four corners of the rectangular top frame 21 one by one, and the bottom ends of the four columns 22 are welded and fixed on the steel bottom supporting platform 3; the four upper horizontal longitudinal connecting rods 23 are connected to the tops of the four columns 22 one by one; the four upper horizontal transverse connecting rods 24 are connected to the tops of the four columns 22 one by one; the four The lower horizontal longitudinal connecting rods 25 are connected to the lower parts of the four columns 22 in a one-to-one correspondence; the four lower horizontal transverse connecting rods 26 are connected to the lower parts of the four columns 22 in a one-to-one correspondence; the adjustment mechanism includes sixteen two-way adjusting bolts 20, which are arranged one-to-one between the four upper horizontal longitudinal connecting rods 23 and the hangers of the vertical trusses 1C of the two longitudinal inner formworks 11, between the four lower horizontal longitudinal connecting rods 25 and the lower parts of the vertical trusses 1C of the two longitudinal inner formworks 11, between the four upper horizontal transverse connecting rods 24 and the upper parts of the vertical trusses 1C of the two transverse inner formworks 12, and between the four lower horizontal transverse connecting rods 26 and the lower parts of the vertical trusses 1C of the two transverse inner formworks 12.

[0037] Four chamfering mechanisms are arranged one by one between the two ends of the two longitudinal inner templates 11 and the two ends of the two transverse inner templates 12; each chamfering mechanism includes a chamfering frame 4A, an opening and closing rotating component 4B, a grout-stopping rubber strip 4C, a locking channel steel 4D and a plurality of wooden blocks 5; wherein,

[0038] The length of the chamfered frame 4A is the same as that of the longitudinal inner template 11 and the transverse inner template 12. The cross section of the chamfered frame 4A is a pentagonal frame with three right angles and includes a chamfered channel steel 41 back to back with the edge banding channel steel 1F, an outer chamfered panel 42 whose inner end is connected to the outer end of the outer waist of the chamfered channel steel 41, an inner chamfered panel 43 whose inner end is fixed to the outer end of the inner waist of the chamfered channel steel 41, a chamfered inclined panel 44 whose upper end is connected to the outer end of the outer chamfered panel 42, and a chamfered straight panel 45 connected between the lower end of the chamfered inclined panel 44 and the outer end of the inner chamfered panel 43;

[0039] The opening and closing rotating component 4B is composed of a plurality of hinge mechanisms arranged between the edge banding channel steel 14 and the chamfered channel steel 41 at intervals of 800 mm; each hinge mechanism comprises a first sleeve 401, a second sleeve 402, a third sleeve 403 and a hinge shaft 400; the lengths of the first sleeve 401, the second sleeve 402 and the third sleeve 403 are all 50 mm; the first sleeve 401 and the third sleeve 403 are coaxially fixed at the intersection of the leg and the inner waist of the edge banding channel steel 14, and the second sleeve 402 is fixed at the intersection of the leg and the inner waist of the chamfered channel steel 41 of the chamfered frame 4A and is coaxially located between the first sleeve 401 and the third sleeve 403; the hinge shaft 400 is rotatably inserted into the inner holes of the first sleeve 401, the second sleeve 402 and the third sleeve 403, so that the chamfered frame 4A is rotatably connected to the edge banding channel steel 14;

[0040] The length of the stop slurry rubber strip 4C is the same as that of the chamfer frame 4A and its cross-section is an isosceles right triangle. The lengths of the right-angled surfaces on both sides of the stop slurry rubber strip 4C are both 69 mm. A positioning groove 404 is opened in the middle of the inclined surface of the stop slurry rubber strip 4C every 500 mm along the length direction. The cross-section of the positioning groove 404 is V-shaped with an angle of 90°. A right-angled surface of the stop slurry rubber strip 4C opposite to the edge-sealing steel plate 1F is tightly attached to the outer side surface of the edge-sealing steel plate 1F of the transverse inner template 12, and is fixed to the edge-sealing steel plate 1F by drilling a self-tapping screw 4D in each positioning groove 404. A number of nuts 4E are also welded on the inner side surface of the edge-sealing steel plate 1F corresponding to the self-tapping screws 4D, so that the end of the self-tapping screw 4D is screwed into the nut 4E to increase the connection strength between the stop slurry rubber strip 4C and the edge-sealing steel plate 1F.

[0041] The locking channel steel 4F is fixed between the inner side surface of the chamfered rib 1E of the transverse inner formwork 12 and the vertical truss 1C of the transverse inner formwork 12;

[0042] A plurality of wooden blocks 5 are embedded at intervals between the locking channel steel 4F and the intersection of the inner chamfered panel 43 and the chamfered straight panel 45 of the chamfered frame 1A.

[0043] When installing the inner mold of the caisson of the present invention, first install the two longitudinal inner molds 11 and the two transverse inner molds 12 and connect them to the inner frame 2. After the two longitudinal inner molds 11 and the two transverse inner molds 12 are installed in place by sixteen two-way adjusting bolts 20, the inner lower corners of the chamfering frame 4A of the four chamfering mechanisms are pushed outward through the opening and closing rotating component 4B to rotate the chamfering frame 4A around the twist shaft 400. When the chamfered channel steel 41 of the chamfering frame 4A is back to back with the edge sealing channel steel 14 and the chamfered inclined panel 44 is tightly attached to the inclined surface of the stop slurry rubber strip 4C, it is rotated into place, and then a number of wooden blocks 5 are intermittently embedded between the locking channel steel 4D and the intersection of the inner chamfered panel 43 and the chamfered straight panel 45 of the chamfering frame 1A to fix the chamfering frame 4A.

[0044] When removing the mold, first knock out a number of wooden blocks 5, then shrink the two longitudinal inner templates 11 and the two transverse inner templates 12 through the sixteen bidirectional adjustment bolts 20, and the chamfering frames 4A of the four chamfering mechanisms rotate under the shrinkage of the two longitudinal inner templates 11 and the two transverse inner templates 12 and separate from the stop rubber strip 4C (see Figure 8 ), so that the entire inner mold can be removed.

[0045] The inner mold of the caisson of the present invention can quickly realize the installation and removal of the inner mold through the cooperation of the chamfering frame 4A rotatably connected to the two ends of the longitudinal inner mold 11 and the stop slurry rubber strip 4C fixed to the two ends of the transverse inner mold 12 through the opening and closing rotating part 4B, which greatly improves the installation and removal efficiency of the inner mold. At least one man-day can be saved when installing and removing each inner mold; the stop slurry rubber strip 4C is not only a part of the chamfering mechanism, but also has a strict stop slurry function, so that the chamfer appearance quality of the caisson is effectively improved. Even if a small amount of concrete slag penetrates, it can be cleaned immediately after demolding without the cooperation of a crane. The inner mold of the caisson of the present invention solves the problems of the original chamfered structure, such as insufficient rigidity of the steel gate plate, easy deformation, easy leakage and difficult cleaning, and cumbersome installation and disassembly.

[0046] The above embodiments are only used to illustrate the present invention, rather than to limit the present invention. Those skilled in the relevant technical field may make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also belong to the scope of the present invention and should be defined by the claims.

Claims

1. An inner mold of a caisson, comprising two longitudinal inner molds, two transverse inner molds, an inner frame, a steel bottom support platform and four chamfering mechanisms; the two longitudinal inner molds and the two transverse inner molds each comprise a panel, a plurality of channel steel horizontal ribs fixed at intervals on the inner side of the panel and a vertical truss connected to the inner side of the plurality of channel steel horizontal ribs; the inner frame is respectively connected to the vertical trusses of the two longitudinal inner molds and the vertical trusses of the two transverse inner molds through an adjustment mechanism; it is characterized in that: The two ends of the panels of the two longitudinal inner formworks are respectively connected to a longitudinal chamfered panel, and an edge-sealed channel steel is fixed to the outer end of the inner side surface of the longitudinal chamfered panel; The two ends of the two transverse inner templates are respectively connected to a chamfered template, which includes a chamfered panel, a plurality of channel steel chamfered ribs fixed at intervals on the inner side of the chamfered panel, and an edge-sealing steel plate fixed to the outer ends of the plurality of channel steel chamfered ribs; Four chamfering mechanisms are arranged one by one between the two ends of the two longitudinal inner templates and the two ends of the two transverse inner templates; each chamfering mechanism includes a chamfering frame, an opening and closing rotating component, a slurry-stopping rubber strip, a locking channel steel and a number of wooden blocks; The length of the chamfered frame is the same as that of the longitudinal inner template and the transverse inner template. The cross section of the chamfered frame is a pentagonal frame with three right angles and includes a chamfered channel steel back to back with the edge banding channel steel, an outer chamfered panel with an inner end connected to the outer end of the outer waist of the chamfered channel steel, an inner chamfered panel with an inner end fixed to the outer end of the inner waist of the chamfered channel steel, a chamfered inclined panel with an upper end connected to the outer end of the outer chamfered panel, and a chamfered straight panel connected between the lower end of the chamfered inclined panel and the outer end of the inner chamfered panel; The opening and closing rotating component is composed of a plurality of groups of hinge mechanisms arranged at intervals between the edge banding channel steel and the chamfered channel steel; each group of hinge mechanisms includes a first shaft sleeve, a second shaft sleeve, a third shaft sleeve and a hinge shaft; the first shaft sleeve and the third shaft sleeve are coaxially fixed at the intersection of the leg and the inner waist of the edge banding channel steel, and the second shaft sleeve is fixed on the outer surface of the leg and the inner waist of the chamfered channel steel of the chamfered frame and is coaxially located between the first shaft sleeve and the third shaft sleeve; the hinge shaft is rotatably inserted into the inner hole of the first shaft sleeve, the inner hole of the second shaft sleeve and the inner hole of the third shaft sleeve, so that the chamfered frame can be rotatably connected to the edge banding channel steel; The length of the stop-slurry rubber strip is the same as that of the chamfer frame and its cross section is an isosceles right triangle. A plurality of positioning grooves are provided at intervals along the length direction in the middle of the inclined surface of the stop-slurry rubber strip. A right-angled surface of the stop-slurry rubber strip opposite to the edge-sealing steel plate is tightly attached to the outer side surface of the edge-sealing steel plate of the transverse inner template and is fixed to the edge-sealing steel plate by drilling a self-tapping screw in each positioning groove. A plurality of nuts are also welded on the inner side surface of the edge-sealing steel plate corresponding to the plurality of self-tapping screws. The locking channel steel is fixed between the inner side surface of the chamfered rib of the transverse inner template and the vertical truss of the transverse inner template; A plurality of wooden blocks are embedded at intervals between the locking channel steel and the intersection of the inner chamfered panel and the chamfered straight panel of the chamfered frame.

2. The inner mold of the caisson according to claim 1, characterized in that: The inner frame includes a rectangular top frame, four columns, four upper horizontal longitudinal connecting rods, four upper horizontal transverse connecting rods, four lower horizontal longitudinal connecting rods and four lower horizontal transverse connecting rods; the top ends of the four columns are connected to the four corners of the rectangular top frame one by one, and the bottom ends of the four columns are welded and fixed on the steel bottom support platform; the four upper horizontal longitudinal connecting rods are connected to the tops of the four columns one by one; the four upper horizontal transverse connecting rods are connected to the tops of the four columns one by one; the four lower horizontal longitudinal connecting rods are connected to the four columns one by one the lower part of the four columns; the four lower horizontal transverse connecting rods are connected to the lower parts of the four columns one by one; the adjusting mechanism includes sixteen two-way adjusting bolts, which are arranged one by one between the four upper horizontal longitudinal connecting rods and the hangers of the vertical trusses of the two longitudinal inner templates, between the four lower horizontal longitudinal connecting rods and the lower parts of the vertical trusses of the two longitudinal inner templates, between the four upper horizontal transverse connecting rods and the upper parts of the vertical trusses of the two transverse inner templates, and between the four lower horizontal transverse connecting rods and the lower parts of the vertical trusses of the two transverse inner templates.

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