A casting template of prefabricated hollow reinforced concrete with cross holes and its use method

Abstract

The present invention provides a casting template for prefabricated hollow reinforced concrete with cross holes, including a molding cavity for molding reinforced concrete, a plurality of longitudinal core tubes for molding longitudinal core holes uniformly distributed in the molding cavity, a plurality of movable transverse core tubes for molding transverse core holes are retractably installed in each longitudinal core tube, the length of the movable transverse core tube is adapted to the spacing between two adjacent longitudinal core tubes, and the length direction of the movable transverse core tube is perpendicular to the length direction of the longitudinal core tube, and the casting template also includes a core retracting mechanism for driving the movable transverse core tube to move in a direction perpendicular to the length direction of the longitudinal core tube. The present invention effectively improves the on-site construction efficiency by pre-processing the hollow template in the factory, and the structure of the present invention is easy to operate, has high operating efficiency, and can greatly shorten the factory pre-processing time.

Description

Technical Field

[0001] The invention relates to the technical field of construction, and in particular to a casting template of prefabricated hollow reinforced concrete with cross holes therein and a use method thereof. Background Art

[0002] In existing construction, the formwork is usually installed first, and then concrete is poured on-site between the formworks to form the wall. The formwork is removed after the wall reaches a certain strength requirement. This construction method has many processes, a long construction period, and a huge workload for on-site assembly and removal of formworks. Moreover, a considerable portion of the removed formworks cannot be reused multiple times, resulting in material waste.

[0003] The Chinese patent number CN102581939A provides a prefabricated reinforced concrete hollow formwork with cross holes and its vertical formwork forming equipment, which is provided with vertical and horizontal holes that interpenetrate each other, so only a small amount of splicing and pouring between the boards is needed at the construction site to build an integrated wall that meets the requirements, and there is no need to disassemble after construction, which greatly simplifies the construction process and significantly shortens the construction period. However, when this hollow formwork is pre-processed in the factory, it still takes a lot of time to complete the assembly of the mold before pouring this hollow formwork, especially the assembly of the cross hole mold core, which is manually constructed, with low production efficiency and unstable quality. Summary of the invention

[0004] The first purpose of the present invention is to provide a casting template for prefabricated hollow reinforced concrete with cross holes inside, which can greatly improve the casting efficiency, is easy to operate and has high molding precision, in view of the above shortcomings.

[0005] The first solution adopted by the present invention to solve the technical problem is: a casting template of prefabricated hollow reinforced concrete with cross holes, the cross holes of the reinforced concrete are formed by the intersection of a plurality of transverse core holes and a plurality of longitudinal core holes, including a forming cavity for forming reinforced concrete, a plurality of longitudinal core tubes for forming the longitudinal core holes are evenly distributed longitudinally in the forming cavity, a plurality of movable transverse core tubes are telescopically installed in each longitudinal core tube, the length direction of the movable transverse core tube is perpendicular to the length direction of the longitudinal core tube, the movable transverse core tubes on each longitudinal core tube are arranged one by one and the length of the movable transverse core tube is adapted to the spacing between two adjacent longitudinal core tubes to form the transverse core hole.

[0006] Furthermore, in order to assemble the forming cavity, the forming cavity is composed of a bottom frame, a front side plate, a rear side plate, a left side plate and a right side plate. The bottom frame is also movably provided with a support plate. The front side plate and the rear side plate are provided with a plurality of core holes for passing the longitudinal core tubes. The left side plate or the right side plate is provided with a plurality of fixed transverse core tubes corresponding to the movable transverse core tubes on each longitudinal core tube.

[0007] Furthermore, in order to achieve the retractability of the movable transverse core tube, so that the movable transverse core tube can be pulled out during casting and the movable transverse core tube can be folded up during demolding, so that the movable transverse core tube can be pulled out together when the longitudinal core tube is extracted; the longitudinal core tube includes a tapered section and a straight section connected to both ends of the tapered section, the longitudinal core tube is composed of three fixed side panels and a movable side panel, a core tube cavity for accommodating the movable transverse core tube is formed between the three fixed side panels and the movable side panel, the three fixed side panels are fixedly connected, the movable side panel is movably connected to two adjacent fixed side panels and the movable side panel can move in the core tube cavity, the movable transverse core tube is fixedly set on the movable side panel, and the sum of the length of the movable transverse core tube and the thickness of the movable side panel is adapted to the transverse aperture of the core tube cavity.

[0008] Furthermore, in order to facilitate the extension and retraction of the movable transverse core tube outside the longitudinal core tube and ensure that the movable transverse core tube is always connected to the longitudinal core tube; both ends of the movable side plate are provided with paddles passing through the core tube cavity, and the width of the paddles is smaller than the width of the movable side plate. One end of the longitudinal core tube is fixedly provided with a fixed end cover, and the other end of the longitudinal core tube is installed with a movable end cover by screws. Both the fixed end cover and the movable end cover are provided with limiting core holes, and the paddles at both ends of the movable side plate extend out from the limiting core holes of the fixed end cover and the movable end cover respectively.

[0009] Furthermore, in order to control the uniform expansion and contraction of the movable transverse core tube within the longitudinal core tube and improve the mold assembly efficiency, the casting template also includes a core retracting and withdrawing mechanism for driving the movable transverse core tube to vertically expand and contract relative to the longitudinal core tube.

[0010] Furthermore, in order to control the movable transverse core tubes in all longitudinal core tubes to move out simultaneously and improve efficiency; the core retracting mechanism includes a driving shaft that can move left and right, the length direction of the driving shaft is perpendicular to the length direction of the longitudinal core tube, and a plurality of driving arms extend radially on the driving shaft, and each driving arm corresponds to each paddle one by one to move the paddle and thereby drive the movable transverse core tube to extend and retract.

[0011] Furthermore, in order to movably install the drive shaft and ensure that the drive shaft can rotate and move axially; there are two drive shafts, and the two drive shafts are respectively installed on the front side plate and the rear side plate, and the left and right ends of the front side plate and the rear side plate are provided with mounting blocks, and the two ends of the drive shaft are respectively movably passed through the two mounting blocks.

[0012] Furthermore, in order to complete the positioning connection of the front side panel, rear side panel, left side panel and right side panel; the front side panel, rear side panel, left side panel and right side panel are all provided with positioning columns extending toward one side of the bottom frame, and the four sides of the bottom frame are all provided with positioning holes for installing the positioning columns.

[0013] Furthermore, in order to complete the installation and connection of the front side panel, the rear side panel, the left side panel and the right side panel; the two sides of the front side panel and the rear side panel are respectively provided with I-shaped connecting heads for installing the left side panel and the right side panel, the left side panel and the right side panel are respectively inserted into the I-shaped connecting heads of the front side panel and the rear side panel, and eccentric sleeves are rotatably installed on both sides of the left side panel and the right side panel, and the I-shaped connecting head is provided with a pin inserted into the eccentric sleeve, and the eccentric sleeve is provided with a handle for rotating the eccentric sleeve to lock the pin.

[0014] The second object of the present invention is to address the above shortcomings and provide a method for using a casting template of prefabricated hollow reinforced concrete with cross holes, which can greatly improve the casting efficiency, is easy to operate, and has high molding accuracy.

[0015] The second solution adopted by the present invention to solve the technical problem is: a method for using a casting template, comprising the following steps:

[0016] (1) Insert the positioning posts on the front side panel, the rear side panel, the left side panel and the right side panel into the positioning holes of the bottom frame. At the same time, insert the left side panel and the right side panel into the I-shaped connectors of the front side panel and the rear side panel. Then, insert the pins into the eccentric sleeves of the left side panel and the right side panel, turn the handle to quickly lock, and then place the support plate on the bottom frame to form a molding cavity;

[0017] (2) laying steel bars in the forming cavity, and after laying, inserting the longitudinal core tube into the forming cavity through the core hole, with the picks at both ends of the longitudinal core tube exposed from the core tube cavity;

[0018] (3) The driving shaft is turned left or right, and the driving arm drives the paddle to move left or right to drive the movable side plate to move out of the core tube cavity, thereby controlling the movable transverse core tube to extend out of the core tube cavity, and the other end of the movable transverse core tube is close to the adjacent longitudinal core tube, completing the assembly of the casting template and starting casting;

[0019] (4) After the casting is completed, the driving shaft is pushed to the right or left, and the driving arm drives the paddle to move to the right or left, and the movable transverse core tube is retracted into the core tube cavity, and then the longitudinal core tube is pulled out from the core hole, and then the front side plate, the rear side plate, the left side plate and the right side plate are removed to complete the demoulding.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] (1) The present invention divides the mold core for forming the transverse core hole into several sections, and sets a core tube cavity in the longitudinal core tube to accommodate the movable transverse core tube. The movable transverse core tube is telescopically installed in the longitudinal core tube to ensure that during casting, the movable transverse core tube extends out of the longitudinal core tube to form the transverse core hole. When demolding, the movable transverse core tube retracts into the longitudinal core tube so as to be pulled out of the longitudinal core tube along the length direction of the longitudinal core tube. The installation and disassembly are very convenient. In addition, the straight sections at both ends of the longitudinal core tube facilitate the installation of the sealing structure, and the tapered section in the middle facilitates demolding.

[0022] (2) The present invention installs a plurality of movable transverse core tubes on the movable side plates, and sets a driving arm corresponding to each movable side plate. When the driving shaft is turned, each movable transverse core tube can be uniformly driven to extend out of the longitudinal core tube, thereby improving the template assembly efficiency. The turning of the driving shaft can be electrically controlled, which is more convenient to use. Moreover, when removing, the driving shaft can be rotated to make the driving arm away from the movable side plate, so as to avoid interference between the two and affect the removal of the longitudinal core tube.

[0023] (3) The molding cavity of the present invention is composed of a front side panel, a rear side panel, a left side panel and a right side panel, which are movably spliced ​​with a bottom frame, so that demolding is convenient. In addition, by setting positioning holes on the bottom frame and positioning columns on the front side panel, the rear side panel, the left side panel and the right side panel, the assembly accuracy is ensured. With the I-shaped connectors of the front side panel and the rear side panel, when the front side panel, the rear side panel, the left side panel and the right side panel are installed with the bottom frame, it is only necessary to insert the pin and rotate the eccentric sleeve to complete the positioning and assembly of the front side panel, the rear side panel, the left side panel and the right side panel, thereby greatly reducing the difficulty of assembly and improving efficiency.

[0024] (4) The present invention effectively improves on-site construction efficiency by pre-processing the hollow formwork in the factory. In addition, the structure of the present invention is easy to operate and has high operating efficiency, which can greatly shorten the factory pre-processing time. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below with reference to the accompanying drawings in conjunction with embodiments:

[0026] Figure 1 It is a structural schematic diagram of the present invention;

[0027] Figure 2 It is a structural explosion diagram of the present invention;

[0028] Figure 3 It is a structural schematic diagram of the latch and the eccentric sleeve;

[0029] Figure 4 It is a structural schematic diagram of a longitudinal core tube;

[0030] Figure 5 This is the structural explosion diagram of the longitudinal core tube.

[0031] In the figure: 1-longitudinal core tube; 101-fixed side plate; 102-movable side plate; 103-core tube cavity; 104-paddle; 105-fixed end cover; 106-movable end cover; 2-movable transverse core tube; 3-fixed transverse core tube; 4-bottom frame; 5-front side plate; 6-rear side plate; 7-left side plate; 8-right side plate; 9-driving shaft; 10-driving arm; 11-mounting block; 12-positioning column; 13-positioning hole; 14-I-shaped connector; 15-support plate; 16-eccentric sleeve; 17-latch pin; 18-handle. DETAILED DESCRIPTION

[0032] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments:

[0033] Specific embodiment 1: Figure 1-5 As shown, this embodiment provides a casting template for prefabricated hollow reinforced concrete with cross holes, the cross holes of the reinforced concrete are formed by the intersection of a plurality of transverse core holes and a plurality of longitudinal core holes, including a forming cavity for forming reinforced concrete, a plurality of longitudinal core tubes 1 for forming the longitudinal core holes are evenly distributed longitudinally in the forming cavity, a plurality of movable transverse core tubes 2 are telescopically installed in each longitudinal core tube 1, the length direction of the movable transverse core tube 2 is perpendicular to the length direction of the longitudinal core tube 1, the movable transverse core tubes 2 on each longitudinal core tube 1 are arranged one by one and the length of the movable transverse core tube 2 is adapted to the spacing between two adjacent longitudinal core tubes 1 to form the transverse core hole, wherein the longitudinal core shaft 1 and the movable transverse core tube 2 are arranged at equal spacing, the longitudinal core tube 1 and the movable transverse core tube 2 can be square, circular or other shapes, in this embodiment, the longitudinal core tube 1 is square, and the movable transverse core tube is circular.

[0034] In this embodiment, in order to assemble and enclose a molding cavity; the molding cavity is composed of a bottom frame 4, a front side plate 5, a rear side plate 6, a left side plate 7 and a right side plate 8. In order to mold brick panels of different lengths, the left side plate 7 and the right side plate 8 can be replaced. By selecting left side plates 7 and right side plates 8 of different lengths to mold finished products of different specifications, one mold can be used for multiple purposes. A support plate 15 is provided on the bottom frame 4. Here, the support plate 15 is demolded after the initial core pulling. During the secondary curing, the support plate 15 takes the wall panel to be cured. The front side plate 5 and the rear side plate 6 are each provided with a plurality of core holes for passing through the longitudinal core tube 1, and the left side plate 7 or the right side plate 8 is provided with a plurality of fixed transverse core tubes 3 corresponding to the movable transverse core tubes 2 on each longitudinal core tube 1.

[0035] In this embodiment, in order to realize the retractability of the movable transverse core tube 2, so that the movable transverse core tube 2 can be pulled out during casting and molding, the movable transverse core tube 2 is retracted during demoulding, so that the movable transverse core tube 2 can be pulled out together when the longitudinal core tube 1 is extracted; the longitudinal core tube 1 includes a tapered section and a straight section connected to the two ends of the tapered section, the straight section is an equiaxial diameter structure, and the two ends of the tapered section are respectively formed with a small diameter end and a large diameter end, the axial diameter of the tapered section gradually increases from the small diameter end to the large diameter end, the two straight sections are respectively connected to the small diameter end and the large diameter end, and the axial diameter of the straight section connected to the small diameter end is equal to the axial diameter of the small diameter end, and the axial diameter of the straight section connected to the large diameter end is equal to the axial diameter of the large diameter end, and the straight section and the tapered section are smooth The longitudinal core tube 1 is composed of three fixed side panels 101 and a movable side panel 102, and a core tube cavity 103 for accommodating a movable transverse core tube 2 is formed in the middle of the three fixed side panels 101 and the movable side panel 102. The three fixed side panels 101 are fixedly connected, and the movable side panel 102 is movably connected to two adjacent fixed side panels 101 and the movable side panel 102 can move in the core tube cavity 103. The movable transverse core tube 2 is fixedly arranged on the movable side panel 102, and the sum of the length of the movable transverse core tube 2 and the thickness of the movable side panel 102 is adapted to the transverse aperture of the core tube cavity 103.

[0036] In this embodiment, in order to facilitate the extension and retraction of the movable transverse core tube 2 outside the longitudinal core tube 1 and ensure that the movable transverse core tube 2 is always connected to the longitudinal core tube 1; both ends of the movable side plate 102 are provided with paddles 104 that pass through the core tube cavity 103, and the width of the paddles 104 is smaller than the width of the movable side plate 102, one end of the longitudinal core tube 1 is fixedly provided with a fixed end cover 105, and the other end of the longitudinal core tube 1 is installed with a movable end cover 106 by screws, and both ends of the two oppositely arranged fixed side plates 101 of the three fixed side plates 101 are provided with mounting flanges for installing the end covers, and the mounting flanges are vertically extended inwardly from the ends of the fixed side plates 101, and the two oppositely arranged fixed side plates 10 1, a gap adapted to the width of the paddle 104 is formed between the mounting flanges on the fixed end cover 105 and the movable end cover 106, and the paddles 104 at both ends of the movable side plate 102 extend from the limited core holes of the fixed end cover 105 and the movable end cover 106 respectively; the paddle 104 includes a first sheet connected to the movable side plate 102 and a second sheet connected to the other side of the first sheet, the thickness of the first sheet is adapted to the thickness of the movable side plate 102, the thickness of the second sheet is less than the thickness of the first sheet to form a step groove close to one side of the movable transverse core tube 2, and the depth of the step groove is adapted to the distance from the hole wall of the limited square hole of the end cover close to the side of the movable transverse core tube 2 to the edge of the end cover.

[0037] In this embodiment, in order to control the unified expansion and contraction of the movable transverse core tube 2 in the longitudinal core tube 1 and improve the mold assembly efficiency, the casting template also includes a core retracting and withdrawing mechanism for driving the movable transverse core tube 2 to vertically expand and contract relative to the longitudinal core tube 1.

[0038] In this embodiment, in order to control the movable transverse core tubes 2 in all longitudinal core tubes 1 to move out simultaneously and improve efficiency, the core retracting mechanism includes a driving shaft 9 that can move left and right, and the length direction of the driving shaft 9 is perpendicular to the length direction of the longitudinal core tube 1. A plurality of driving arms 10 extend radially from the driving shaft 9, and each driving arm 10 corresponds to each paddle 104 one by one to paddle the paddle 104 to move and thereby drive the movable transverse core tube 2 to retract or extend.

[0039] In this embodiment, in order to movably install the drive shaft 9 and ensure that the drive shaft 9 can rotate and move axially, the drive shaft 9 has two drive shafts 9, and the two drive shafts 9 are respectively installed on the front side plate 5 and the rear side plate 6, and the left and right ends of the front side plate 5 and the rear side plate 6 are provided with mounting blocks 11, and the two ends of the drive shaft 9 are respectively movably passed through the two mounting blocks 11.

[0040] In this embodiment, in order to complete the positioning connection of the front side panel 5, the rear side panel 6, the left side panel 7 and the right side panel 8; the front side panel 5, the rear side panel 6, the left side panel 7 and the right side panel 8 are all provided with positioning columns 12 extending toward one side of the bottom frame 4, and the four sides of the bottom frame 4 are all provided with positioning holes 13 for installing the positioning columns 12.

[0041] In this embodiment, in order to complete the installation and connection of the front side panel 5, the rear side panel 6, the left side panel 7 and the right side panel 8; the two sides of the front side panel 5 and the rear side panel 6 are respectively provided with I-shaped connecting heads 14 for installing the left side panel 7 and the right side panel 8, the left side panel 7 and the right side panel 8 are respectively inserted into the I-shaped connecting heads 14 of the front side panel 5 and the rear side panel 6, and the two sides of the left side panel 7 and the right side panel 8 are rotatably installed with eccentric sleeves 16, and an eccentric hole is formed in the eccentric sleeve 16, and the I-shaped connecting head 14 is provided with a pin 17 inserted into the eccentric sleeve 16, and the eccentric sleeve 16 is provided with a handle 18 for rotating the eccentric sleeve 16 to lock the pin 17.

[0042] Specific embodiment 2: This embodiment provides a method for using a casting template, comprising the following steps:

[0043] (1) Insert the positioning posts 12 on the front side plate 5, the rear side plate 6, the left side plate 7 and the right side plate 8 into the positioning holes 13 of the bottom frame 4. At the same time, the left side plate 7 and the right side plate 8 are inserted into the I-shaped connectors 14 of the front side plate 5 and the rear side plate 6. Then, insert the latch into the eccentric sleeves 16 of the left side plate 7 and the right side plate 8, turn the handle to quickly lock, and then place the support plate 15 on the bottom frame 4 to form a molding cavity;

[0044] (2) laying steel bars in the forming cavity. After laying, insert the longitudinal core tube 1 into the forming cavity through the core hole, and the paddles 104 at both ends of the longitudinal core tube 1 expose the core tube cavity 103;

[0045] (3) The driving shaft 9 is turned left or right, and the driving arm 10 drives the paddle 104 to move left or right to drive the movable side plate 102 to move out of the core tube cavity 103, thereby controlling the movable transverse core tube 2 to extend out of the core tube cavity 103, and the other end of the movable transverse core tube 2 is close to the adjacent longitudinal core tube 1, completing the assembly of the casting template and starting casting;

[0046] (4) After the casting is completed, the driving shaft 9 is moved to the right or left, and the driving arm 10 drives the paddle 104 to move to the right or left, and the movable transverse core tube 2 is retracted into the core tube cavity 103, and then the longitudinal core tube 1 is pulled out from the core hole, and then the front side plate 5, the rear side plate 6, the left side plate 7 and the right side plate 8 are removed to complete the demoulding.

[0047] The present invention can effectively improve the on-site construction efficiency by pre-processing the hollow template in the factory. In addition, the structure of the present invention is easy to operate and has high working efficiency, which can greatly shorten the factory pre-processing time. The core of the mold for forming the transverse core hole is split into several sections, and a core tube cavity 103 is set in the longitudinal core tube 1 to accommodate the movable transverse core tube 2. The movable transverse core tube 2 can be telescopically installed in the longitudinal core tube 1 to ensure that the movable transverse core tube 2 extends out of the longitudinal core tube 1 to form the transverse core hole during casting. When the mold is removed, the movable transverse core tube 2 is retracted into the longitudinal core tube 1 so as to be pulled out of the longitudinal core tube 1 along the length direction of the longitudinal core tube 1. The installation and disassembly are very convenient. Moreover, a plurality of movable transverse core tubes 2 are installed on the movable side plates 102, and a driving arm 10 is set to correspond to each movable side plate 102 one by one. When the driving shaft 9 is turned, each movable transverse core tube 2 can be uniformly driven to extend out of the longitudinal core tube 1, thereby Improve the template assembly efficiency, the driving shaft 9 can be electrically controlled, which is more convenient to use, and when dismantling, the driving shaft 9 can be rotated to make the driving arm 10 away from the movable side plate 102 to avoid interference between the two and affecting the dismantling of the longitudinal core tube 1; the molding cavity is composed of the front side plate 5, the rear side plate 6, the left side plate 7 and the right side plate 8, which are movably spliced ​​with the bottom frame 4, which is convenient for demolding, and by setting positioning holes 13 on the bottom frame 4, setting positioning columns 12 on the front side plate 5, the rear side plate 6, the left side plate 7 and the right side plate 8, the assembly accuracy is guaranteed, and the I-shaped connector 14 of the front side plate 5 and the rear side plate 6 is matched. When the front side plate 5, the rear side plate 6, the left side plate 7 and the right side plate 8 are installed with the bottom frame 4, you only need to insert the pin and rotate the eccentric sleeve 16 to complete the positioning and assembly of the front side plate 5, the rear side plate 6, the left side plate 7 and the right side plate 8, which greatly reduces the difficulty of assembly and improves efficiency.

[0048] The above descriptions are merely embodiments of the present invention, and are not intended to limit the scope of patent protection of the invention. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the scope of patent protection of the present invention.

Claims

1. A casting template of prefabricated hollow reinforced concrete with cross holes, wherein the cross holes of the reinforced concrete are formed by the intersection of a plurality of transverse core holes and a plurality of longitudinal core holes, characterized in that: It comprises a forming cavity for forming reinforced concrete, wherein a plurality of longitudinal core tubes for forming longitudinal core holes are evenly distributed in the longitudinal direction of the forming cavity, a plurality of movable transverse core tubes are telescopically installed in each longitudinal core tube, the length direction of the movable transverse core tube is perpendicular to the length direction of the longitudinal core tube, the movable transverse core tubes on each longitudinal core tube are arranged one by one and the length of the movable transverse core tube is adapted to the spacing between two adjacent longitudinal core tubes to form the transverse core hole, and the longitudinal core tubes and the movable transverse core tubes are arranged at equal spacing.

2. The casting formwork of prefabricated hollow reinforced concrete with cross holes according to claim 1, characterized in that: The molding cavity is composed of a bottom frame, a front side plate, a rear side plate, a left side plate and a right side plate. A supporting plate is also movably provided on the bottom frame. The front side plate and the rear side plate are each provided with a plurality of core holes for passing through the longitudinal core tube. The left side plate or the right side plate is provided with a plurality of fixed transverse core tubes corresponding one by one to the movable transverse core tubes on each longitudinal core tube.

3. The casting formwork of prefabricated hollow reinforced concrete with cross holes according to claim 2, characterized in that: The longitudinal core tube includes a tapered section and a straight section connected to both ends of the tapered section. The longitudinal core tube is composed of three fixed side plates and one movable side plate. A core tube cavity for accommodating a movable transverse core tube is formed between the three fixed side plates and the movable side plate. The three fixed side plates are fixedly connected to each other. The movable side plate is movably connected to two adjacent fixed side plates and the movable side plate can move in the core tube cavity. The movable transverse core tube is fixedly arranged on the movable side plate. The sum of the length of the movable transverse core tube and the thickness of the movable side plate is adapted to the transverse aperture of the core tube cavity.

4. The casting formwork of prefabricated hollow reinforced concrete with cross holes according to claim 3, characterized in that: Both ends of the movable side plate are provided with paddles that pass through the core tube cavity, and the width of the paddles is smaller than the width of the movable side plate. One end of the longitudinal core tube is fixedly provided with a fixed end cover, and the other end of the longitudinal core tube is installed with a movable end cover by screws. The fixed end cover and the movable end cover are both provided with limiting core holes, and the paddles at both ends of the movable side plate extend out from the limiting core holes of the fixed end cover and the movable end cover respectively.

5. The casting formwork of prefabricated hollow reinforced concrete with cross holes according to claim 4, characterized in that: The casting template also includes a core retracting and extending mechanism for driving the movable transverse core tube to vertically extend and retract relative to the longitudinal core tube.

6. The casting formwork of prefabricated hollow reinforced concrete with cross holes according to claim 5, characterized in that: The core retracting and extracting mechanism includes a driving shaft that can move left and right, the length direction of the driving shaft is perpendicular to the length direction of the longitudinal core tube, and a plurality of driving arms extend radially from the driving shaft, each driving arm corresponds to each paddle one by one to move the paddle and thereby drive the movable transverse core tube to extend and retract.

7. The casting formwork of prefabricated hollow reinforced concrete with cross holes according to claim 6, characterized in that: There are two drive shafts, which are respectively mounted on the front side plate and the rear side plate. Both left and right ends of the front side plate and the rear side plate are provided with mounting blocks, and both ends of the drive shaft are respectively movably inserted into the two mounting blocks.

8. The casting formwork of prefabricated hollow reinforced concrete with cross holes according to claim 2, characterized in that: The front side plate, the rear side plate, the left side plate and the right side plate are all provided with positioning posts extending toward one side of the bottom frame, and the four side surfaces of the bottom frame are all provided with positioning holes for installing the positioning posts.

9. The casting formwork of prefabricated hollow reinforced concrete with cross holes according to claim 8, characterized in that: The front side plate and the rear side plate are respectively provided with I-shaped connectors for installing the left side plate and the right side plate on both sides, and the left side plate and the right side plate are respectively inserted into the I-shaped connectors of the front side plate and the rear side plate. Eccentric sleeves are rotatably installed on both sides of the left side plate and the right side plate, and the I-shaped connector is provided with a pin inserted into the eccentric sleeve. The eccentric sleeve is provided with a handle for rotating the eccentric sleeve to lock the pin.

10. A method for using the casting template according to any one of claims 1 to 9, characterized in that: The following steps are involved: (1) Insert the positioning posts on the front side panel, the rear side panel, the left side panel and the right side panel into the positioning holes of the bottom frame. At the same time, insert the left side panel and the right side panel into the I-shaped connectors of the front side panel and the rear side panel. Then, insert the pins into the eccentric sleeves of the left side panel and the right side panel, turn the handle to quickly lock, and then place the support plate on the bottom frame to form a molding cavity; (2) laying steel bars in the forming cavity, and after laying, inserting the longitudinal core tube into the forming cavity through the core hole, with the picks at both ends of the longitudinal core tube exposing the core tube cavity; (3) The driving shaft is turned left or right, and the driving arm drives the paddle to move left or right to drive the movable side plate to move out of the core tube cavity, thereby controlling the movable transverse core tube to extend out of the core tube cavity, and the other end of the movable transverse core tube is close to the adjacent longitudinal core tube, completing the assembly of the casting template and starting casting; (4) After the casting is completed, the driving shaft is pushed to the right or left, and the driving arm drives the paddle to move to the right or left, and the movable transverse core tube is retracted into the core tube cavity, and then the longitudinal core tube is pulled out from the core hole, and then the front side plate, the rear side plate, the left side plate and the right side plate are removed to complete the demoulding.

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