Concrete precast beam pouring mold with connecting groove and mold assembling and disassembling method thereof

Abstract

The invention discloses a concrete precast beam pouring mold with a connecting groove, which comprises a side mold for pouring a precast beam, the side mold consists of two side molds and two end molds, and a hollow cuboid middle mold matched with the connecting groove in the middle of the precast beam is arranged in the middle of the side mold. A long-strip-shaped stirrup avoiding groove capable of avoiding a stirrup of a precast beam part is formed in the bottom face of the middle mold, long-strip-shaped main reinforcement avoiding grooves capable of avoiding a section of a main reinforcement part are formed in the two side faces, perpendicular to the side molds, of the middle mold, the middle mold is formed by splicing two half middle molds in the width direction of the side molds, and the two half middle molds are connected with the corresponding side molds through first connecting pieces correspondingly. The stirrup avoiding groove and the main reinforcement avoiding groove are each composed of two sections, and the two sections of the stirrup avoiding groove and the two sections of the main reinforcement avoiding groove are located on the two half middle molds correspondingly. The die is convenient to assemble and disassemble. The invention further discloses a die assembling and disassembling method of the concrete precast beam pouring die with the connecting groove.

Description

Technical Field

[0001] The present invention relates to prefabricated buildings, and particularly to a casting mold for a concrete precast beam with connecting grooves, and also to a method for installing and removing the mold of the concrete precast beam with connecting grooves. Background Art

[0002] Nowadays, with the continuous development of the construction industry, prefabricated buildings have been more and more widely used. Among prefabricated buildings, concrete precast structures (PC) are mainly used, accounting for more than 68.3%. Currently, precast beams, precast columns, composite slabs, etc. are mainly used among concrete precast components. Precast beams are used more and more in prefabricated buildings, and the structural assembly modes are becoming more and more diverse, more and more complex, and the precision requirements for precast components are getting higher and higher.

[0003] The forming of concrete precast components mainly depends on steel molds. With the increasing requirements for the structure and precision of concrete precast components, the requirements for the forming steel molds are also increasing. It is necessary to consider the operability of precast component production, the forming precision of components, the processability of molds, and at the same time, the convenience of mold installation and removal during the production process.

[0004] A precast beam with a middle connecting groove and shear groove for connecting with secondary beams in the middle and end connecting grooves at both ends is relatively typical. The existing molds for casting this precast beam are not convenient for mold installation and removal. Based on this, a mold for casting this precast beam is proposed and this mold is convenient for mold installation and removal. Summary of the Invention

[0005] In view of this, one of the purposes of the present invention is to provide a casting mold for a concrete precast beam with connecting grooves to solve the technical problems proposed in the background art; the second purpose of the present invention is to provide a method for installing and removing the mold of the concrete precast beam with connecting grooves.

[0006] One of the purposes of the present invention is achieved through the following technical solutions: A casting mold for a concrete precast beam with connecting grooves, which includes side molds for casting precast beams. The side molds are composed of two side forms and two end forms. A hollow cuboid middle mold matching the middle connecting groove of the precast beam is arranged in the middle of the side molds. A long strip-shaped stirrup avoidance groove for avoiding part of the stirrups of the precast beam is arranged on the bottom surface of the middle mold. Long strip-shaped main reinforcement avoidance grooves for avoiding part of the main reinforcement segments are arranged on the two side surfaces of the middle mold perpendicular to the side forms. The middle mold is spliced by two half middle molds in the width direction of the side mold. The two half middle molds are respectively connected to the corresponding side forms through first connectors. The stirrup avoidance groove and the main reinforcement avoidance groove are both composed of two segments. The two segments of the stirrup avoidance groove and the main reinforcement avoidance groove are respectively located on the two half middle molds.

[0007] Further, one half of the middle mold includes two modules spliced in the length direction of the side mold.

[0008] Furthermore, one module is formed by vertically connecting three templates.

[0009] Furthermore, the splicing seam between two modules in the length direction of the side form gradually increases starting from the edge form.

[0010] Furthermore, on both outer sides of the middle form perpendicular to the edge form, there are middle shear forms matching the middle shear grooves of the precast beam, and both ends of the middle shear form are respectively connected to the two half middle forms through second connectors.

[0011] Furthermore, the end form is formed by connecting an end template and an end module inside the end template that matches the end connection groove of the precast beam through a third connector. The end template is provided with main reinforcement passing holes matching the main reinforcement of the precast beam and embedded part installation holes matching the end embedded parts of the precast beam.

[0012] Furthermore, the end module is cuboid-shaped, and the two sides of the end module opposite to the two edge forms gradually move away from bottom to top.

[0013] Even further, on the lower side of the end module of the end template, there is an end shear form matching the end shear groove of the precast beam fixed.

[0014] Still further, along the length direction of the edge form in the middle of the edge form, there are three rows of first connection holes. The row of first connection holes at the edge is a shared connection hole. On both sides of the middle form corresponding to the edge form along the length direction of the edge form, there are two rows of first connection holes. The row of first connection holes of multiple middle forms corresponding to precast beams of different specifications can be aligned with the shared connection hole, and the other row of first connection holes can be aligned with one row of first connection holes of the other two rows of first connection holes of the edge form. The middle form and the edge form are connected by bolts passing through the aligned first connection holes; at both ends of the edge form along the length direction of the edge form, there are multiple rows of second connection holes respectively, and there is one row of second connection holes on the end form. The row of second connection holes of multiple end forms corresponding to precast beams of different specifications can be aligned with one row of second connection holes at one end of the edge form. The end form and the edge form are connected by bolts passing through the aligned second connection holes. The distances between the middle form and each row of second connection holes on its two sides match precast beams of different specifications.

[0015] The second object of the present invention is achieved through the following technical solutions: A method for installing and removing the formwork of a concrete precast beam casting mold with connection grooves, which uses the concrete precast beam casting mold with connection grooves according to any one of claims 5 - 9, including an installation method and a removal method: The installation method includes the following steps: S1. Apply a release agent to the mold; S2. Place the steel reinforcement cage on the mold table; S3. Place two modules on both sides of the corresponding connection groove in the middle of the precast beam of the steel reinforcement cage respectively, and align the stirrup avoidance grooves of the modules with the stirrups. Push each module from both sides of the steel reinforcement cage towards the middle to splice the four modules into a complete middle mold; S4. Install two side molds and two end molds; S5. Use the first connecting piece to connect each module with the two side molds respectively; S6. Place the middle shear molds on the two outer sides perpendicular to the side molds, and use the second connecting piece to connect the two ends of the middle shear molds with the two modules respectively; The formwork removal method includes the following steps: S1. Remove the first connecting piece connecting each module with the two side molds; S2. Remove the side molds; S3. Remove the third connecting piece connecting the end formwork and the end module, remove the end formwork, and use a hoisting device to lift the end module upwards to remove the end module; S4. Remove the second connecting piece connecting the two middle shear molds with the modules, pull each module towards the two sides of the precast beam respectively to remove the middle mold, and pull the middle shear molds into the middle connection groove of the precast beam to remove the two middle shear molds.

[0016] The beneficial effects of the present invention are: For the concrete precast beam casting mold with a connection groove proposed by the present invention, the middle mold is spliced by two half middle molds. The two half middle molds are connected with the two side molds through the first connecting piece. The installation and removal of the middle mold are carried out by pushing and pulling the two half middle molds from both sides of the side mold respectively, which is convenient for installation and removal.

[0017] One half of the middle mold includes two modules spliced in the length direction of the side mold. The splicing seam of these two modules gradually increases from the side mold, which solves the technical problem that it is difficult to remove the two half middle molds due to excessive concrete pressure on both sides.

[0018] The setting of the middle shear mold can not only form shear grooves on the precast beam, but also play a role in connecting the two half middle molds, thereby improving the strength and stiffness of the middle mold.

[0019] The end mold is composed of an end formwork and an end module inside the end formwork connected by a third connecting piece. The two sides of the end module opposite to the two side molds gradually move away from bottom to top. During formwork removal, first remove the end formwork, and then use a hoisting device to lift the end module upwards, making the removal of the end module more convenient.

[0020] By arranging three rows of first connection holes in the middle of the side mold and multiple rows of second connection holes at the end of the side mold, the end molds and middle molds of precast beams with different specifications can be combined with this side mold, so as to realize the sharing of a set of molds for multiple precast beams and reduce the mold cost.

[0021] The method for installing and disassembling the casting mold of the precast concrete beam with connecting grooves proposed by the present invention is convenient for installation and disassembly.

[0022] Other advantages, objectives and features of the present invention will be elaborated to some extent in the subsequent specification, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the following specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the drawings, where: Figure 1 is the first perspective three-dimensional view of the present invention.

[0024] Figure 2 is the second perspective three-dimensional view of the present invention.

[0025] Figure 3 is the third perspective three-dimensional view of the present invention.

[0026] Figure 4 is the fourth perspective three-dimensional view of the present invention.

[0027] Figure 5 is Figure 4 the enlarged schematic view of part A in

[0028] Figure 6 is Figure 4 the enlarged schematic view of part B in

[0029] Figure 7 is the three-dimensional view of the middle mold in the present invention.

[0030] Figure 8 is the front view of the first precast beam to be produced by the present invention.

[0031] Figure 9 is the front view of the layout position of the middle mold and the end mold in the side mold when the first precast beam is produced by the present invention.

[0032] Figure 10 is the front view of the second precast beam to be produced by the present invention.

[0033] Figure 11 is the front view of the layout position of the middle mold and the end mold in the side mold when the second precast beam is produced by the present invention.

[0034] Figure 12 is the front view of the third precast beam to be produced by the present invention.

[0035] Figure 13This is the front view of the layout positions of the middle mold and the end mold in the side mold when producing the third precast beam of the present invention.

[0036] Figure 14 This is the front view of the fourth precast beam to be produced by the present invention.

[0037] Figure 15 This is the front view of the layout positions of the middle mold and the end mold in the side mold when producing the fourth precast beam of the present invention.

[0038] In the figure: side mold 1, end mold 2, tooling 3, embedded part installation rack 4, end formwork 5, end module 6, main reinforcement of precast beam 7, main reinforcement through hole 8, embedded part installation hole 9, end shear mold 10, lifting lug 11, middle connection groove of precast beam 12, middle mold 13, stirrup 14, stirrup avoidance groove 15, main reinforcement avoidance groove 16, module 17, splicing joint 18, middle shear groove of precast beam 19, middle shear mold 20, first connection hole 21, second connection hole 22. Detailed implementation manners

[0039] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the preferred embodiments are only for explaining the present invention, rather than limiting the protection scope of the present invention.

[0040] Embodiment 1 As Figure 1-7 shown, the concrete precast beam casting mold with a connection groove is used on a mold table. It includes a side mold for casting a precast beam. The side mold is composed of two side molds 1 and two end molds 2. The lower sides of the two side molds 1 are fixed to the mold table by bolts, and the upper sides of the two side molds 1 are connected by tooling 3. There are many existing technologies for such tooling 3. For example, the tooling 3 includes two inverted S-shaped connecting blocks, and the two inverted S-shaped connecting blocks are respectively welded to the two side molds. A connecting rod is placed in the two opposite connection grooves of the two inverted S-shaped connecting blocks, and the two ends of the connecting rod are threadedly connected with connection heads that can be clamped on the S-shaped connecting blocks. An embedded part installation rack 4 is also detachably connected between the upper sides of the two side molds 1. There are various existing technologies for the embedded part installation rack 4. For example, the embedded part installation rack 4 includes two support rods, a cross bar is supported by the two support rods, a hanging rod is connected to the cross bar by bolts, and an embedded part is connected to the hanging rod by bolts. The two support rods are connected to the two side molds by bolts.

[0041] The end formwork 2 is formed by connecting an end template 5 and an end module 6 inside the end template 5 that matches the connection groove at the end of the precast beam through a third connecting piece. The third connecting piece is a bolt. Two side formworks 1 are respectively connected to both sides of the end template 5 through bolts. The end template 5 is provided with a main reinforcement passing hole 8 that matches the main reinforcement 7 of the precast beam and an embedded part installation hole 9 that matches the embedded part at the end of the precast beam. At the lower side of the end module 6 on the end template 5, an end shear form 10 that matches the end shear groove of the precast beam is fixed. The end module 6 is cuboid-shaped and has two lifting lugs 11 at the top. The two sides of the end module 6 opposite to the two side formworks 1 gradually move away from bottom to top. For such an end formwork 2, when removing the formwork, the end template 5 is first removed, and then a lifting device is used to lift the end module 6 upward through the lifting lugs 11. Such an end formwork 2 can avoid the problem that it is difficult to remove the formwork due to the end module 6 being embedded in the concrete.

[0042] In the middle of the side formwork, there is a hollow cuboid-shaped middle form 13 that matches the middle connection groove 12 of the precast beam. The bottom surface of the middle form 13 is provided with a long strip-shaped stirrup avoidance groove 15 that can avoid part of the stirrups 14 of the precast beam. Both side surfaces of the middle form 13 perpendicular to the side formwork 1 are provided with long strip-shaped main reinforcement avoidance grooves 16 that can avoid part of the segments of the main reinforcement 7 of the precast beam; the middle form 13 is formed by splicing two half-middle forms in the width direction of the side formwork. The two half-middle forms are respectively detachably connected to the corresponding side formworks 1 through a first connecting piece. The first connecting piece is a bolt. Both the stirrup avoidance groove 15 and the main reinforcement avoidance groove 16 are composed of two segments. The two segments of the stirrup avoidance groove 15 and the main reinforcement avoidance groove 16 are respectively located on the two half-middle forms; one half-middle form includes two modules 17 spliced in the length direction of the side formwork. One module 17 is formed by vertically connecting three templates. One of the three templates is 1 / 4 of the bottom surface of the middle form and has one segment of the stirrup avoidance groove 15, another template is connected to the side formwork 1, and the remaining one template is 1 / 2 of the side surface of the middle form 13 and has one segment of the main reinforcement avoidance groove 7. The splicing seam 18 of the two modules 17 in the length direction of the side formwork gradually increases starting from the side formwork 1; on both sides of the middle form 13 perpendicular to the side formwork 1, there is a middle shear form 20 that matches the middle shear groove 19 of the precast beam. Both ends of the middle shear form 20 are respectively connected to the two half-middle forms through a second connecting piece. The second connecting piece is a bolt; for the middle form 13 with such a structure, both the formwork installation and removal are carried out by pushing and pulling each module 17 from both sides of the side formwork. The formwork installation and removal are convenient. The splicing seam 18 of the two modules 17 spliced in the length direction of the side formwork gradually increases starting from the side formwork, which can avoid the situation that it is difficult to remove each module 17 due to excessive concrete pressure on both sides of the middle form 13. The setting of the middle shear form 20 can not only form a shear groove 19 on the precast beam, but also play a role in connecting the two half-middle forms, thereby improving the strength and stiffness of the middle form 13.

[0043] Embodiment 2 As Figure 1-7As shown, the difference from the first embodiment is as follows: Three rows of first connection holes 21 are provided in the middle of the side form 1 along the length direction of the side form 1. One row of first connection holes 21 on the right edge is a shared connection hole, and the remaining holes on both sides of the first connection holes in the middle of the side form are precast beam embedded part installation holes. Two rows of first connection holes 21 are respectively provided on both sides of the middle form 13 corresponding to the side form 13 along the length direction of the side form. One row of first connection holes 21 of various middle forms 13 corresponding to precast beams of different specifications can be aligned with the shared connection hole, and the other row of first connection holes 21 can be aligned with one row of the remaining two rows of first connection holes 21 on the side form. The middle form 13 and the side form 1 are connected by bolts passing through the aligned first connection holes 21; A plurality of rows of second connection holes 22 are provided at the left end of the side form 1 along the length direction of the side form, and a plurality of rows of second connection holes 22 are provided at the right end of the side form 1 along the length direction of the side form 1; One row of second connection holes 22 is provided on the end form 2. One row of second connection holes 22 of various end forms 22 corresponding to precast beams of different specifications can be aligned with one row of second connection holes 22 at one end of the side form 1. The end form 22 and the side form 1 are connected by bolts passing through the aligned second connection holes 22. The distances between the middle form 13 and each row of second connection holes 22 on both sides of it match precast beams of different specifications (as Figure 8-15 shown). By providing three rows of first connection holes 21 in the middle of the side form 1 and a plurality of rows of second connection holes 22 at the ends of the side form 2, the end form 2 and the middle form 13 of precast beams of different specifications can be connected to this side form 1, so as to realize the sharing of a set of molds for multiple precast beams and reduce the mold cost.

[0044] Embodiment Three As Figure 1-7 shown, a mold loading and unloading method for a concrete precast beam casting mold with connection grooves uses the above-mentioned concrete precast beam casting mold with connection grooves, including a mold loading method and a mold unloading method: The mold loading method includes the following steps: S1. Apply mold release agent to the mold; S2. Place the steel reinforcement cage on the mold table; S3. Place two blocks of modules 17 on both sides of the steel reinforcement cage corresponding to the middle connection groove 13 of the precast beam respectively, and make the stirrup avoidance grooves 15 of the modules 17 align with the stirrups 14. Push each module 17 from both sides of the steel reinforcement cage towards the middle to splice the four modules 17 into a complete middle form 13; S4. Install two side forms 1 on the mold table with bolts, connect the upper sides of the two side forms 1 with a tooling 3, and connect the two end forms 2 to the two ends of the two side forms 1 with bolts; S5. Connect each module 17 to the two side forms 1 with bolts respectively; S6. Place the middle shear molds 20 on both sides perpendicular to the side form 1 of the middle form 13 respectively, and connect the two ends of the middle shear molds 20 to the two modules 17 with bolts; S7. Use a plugging member such as a rubber plug or foam to plug the unused holes or grooves.

[0045] The formwork removal method includes the following steps: S1. Remove the bolts connecting each module 17 to the two side forms 1, remove the bolts connecting the two end forms 2 to the two side forms 1, remove the tooling 3, and remove the connecting bolts between the side form 1 and the form table. S2. Remove the side form 1. S3. Remove the bolts connecting the end form 5 to the end module 6, remove the end form 5, and use a hoisting device to lift the end module 6 upward to remove the end module 6. S4. Remove the bolts connecting the two middle shear forms 20 to the middle form 13, pull each module 17 to both sides of the precast beam to remove the middle form 13, and pull the middle shear forms into the middle connecting groove 13 of the precast beam to remove the two middle shear forms 20.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the present technical solution, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A casting mold for a precast concrete beam with a connecting groove, which comprises side molds for casting the precast beam. The side molds are composed of two side forms (1) and two end forms (2), and are characterized in that: A hollow cuboid-shaped middle mold (13) matching the middle connection groove (12) of the precast beam is provided in the middle of the side mold. A strip-shaped stirrup avoidance groove (15) capable of avoiding part of the stirrups (14) of the precast beam is provided on the bottom surface of the middle mold (13). Long strip-shaped main reinforcement avoidance grooves (16) capable of avoiding part of the segments of the main reinforcement (7) of the precast beam are provided on both sides of the middle mold (13) perpendicular to the side mold (1). The middle mold (13) is formed by splicing two half middle molds in the width direction of the side mold. The two half middle molds are respectively connected to the corresponding side molds (1) through first connectors. Both the stirrup avoidance groove (15) and the main reinforcement avoidance groove (16) are composed of two segments, and the two segments of the stirrup avoidance groove (15) and the main reinforcement avoidance groove (16) are respectively located on the two half middle molds.

2. The concrete precast beam casting mold with a connecting groove according to claim 1, wherein: One half of the middle mold includes two modules (17) spliced in the length direction of the side mold.

3. The concrete precast beam casting mold with a connecting groove according to claim 2, characterized in that: One module (17) is formed by vertically connecting three templates.

4. The concrete precast beam casting mold with a connecting groove according to claim 2, wherein: The splicing seam (18) of the two modules (17) in the length direction of the side mold gradually increases starting from the side mold (1).

5. The concrete precast beam casting mold with a connecting groove according to claim 1, characterized in that: Middle shear molds (20) matching the middle shear grooves (19) of the precast beam are provided on both sides of the middle mold (13) perpendicular to the side mold (1). The two ends of the middle shear molds (20) are respectively connected to the two half middle molds through second connectors.

6. The concrete precast beam casting mold with a connecting groove according to claim 1, characterized in that: The end mold (2) is formed by connecting an end template (5) and an end module (6) inside the end template (5) matching the end connection groove of the precast beam through a third connector. Main reinforcement passing holes (8) matching the main reinforcement (7) of the precast beam and embedded part installation holes (9) matching the end embedded parts of the precast beam are provided on the end template (5).

7. The concrete precast beam casting mold with a connecting groove according to claim 6, characterized in that: The end module (6) is cuboid-shaped, and the two sides of the end module (6) opposite to the two side molds (1) gradually move away from bottom to top.

8. The concrete precast beam casting mold with a connecting groove according to claim 6, characterized in that: An end shear mold (10) matching the end shear groove of the precast beam is fixed on the lower side of the upper end module (6) of the end template (5).

9. The concrete precast beam casting mold method with a connecting groove according to any one of claims 1-9, characterized in that: Three rows of first connection holes (21) are provided in the middle of the side mold (1) along the length direction of the side mold (1). The row of first connection holes (21) at the edge is a common connection hole. Two rows of first connection holes (21) are provided on both sides of the middle mold (13) corresponding to the side mold (1) along the length direction of the side mold (1). One row of first connection holes (21) of multiple middle molds (13) corresponding to different specifications of precast beams can be aligned with the common connection hole, and the other row of first connection holes (21) can be aligned with one row of the other two rows of first connection holes (21) on the side mold. The middle mold (13) and the side mold (1) are connected by bolts passing through the aligned first connection holes (21). Multiple rows of second connection holes (22) are respectively provided at both ends of the side mold (1) along the length direction of the side mold (1). One row of second connection holes (22) is provided on the end mold (2). One row of second connection holes (22) of multiple end molds (2) corresponding to different specifications of precast beams can be aligned with one row of second connection holes (22) at one end of the side mold (1). The end mold (2) and the side mold (1) are connected by bolts passing through the aligned second connection holes (22). The distances between the middle mold (13) and each row of second connection holes (22) on both sides of it match different specifications of precast beams.

10. A method for installing and removing the formwork of a concrete precast beam casting mold with a connection groove, characterized in that: It utilizes the concrete precast beam casting mold with connecting grooves described in any one of claims 5-9, including a mold installation method and a mold removal method: The mold installation method includes the following steps: S1. Apply a mold release agent to the mold; S2. Place the steel reinforcement cage on the mold table; S3. Place two modules (17) on both sides of the steel reinforcement cage corresponding to the middle connecting groove (12) of the precast beam, and align the stirrup avoidance grooves (15) of the modules (17) with the stirrups (14). Push each module (17) from both sides of the steel reinforcement cage towards the middle to splice the four modules (17) into a complete middle mold (13); S4. Install two side molds (1) and two end molds (2); S5. Use the first connecting piece to connect each module (17) to the two side molds (1) respectively; S6. Place the middle shear molds (20) on the two outer sides perpendicular to the side mold (1) of the middle mold (13), and use the second connecting piece to connect the two ends of the middle shear mold (20) to the two modules (17) respectively; The mold removal method includes the following steps: S1. Remove the first connecting piece connecting each module (17) to the two side molds (7); S2. Remove the side molds; S3. Remove the third connecting piece connecting the end template (5) to the end module (6), remove the end template (5), and use a lifting device to lift the end module (6) upwards to remove the end module (6); S4. Remove the second connecting piece connecting the two middle shear molds (20) to the module (17), pull each module (17) towards the two sides of the precast beam to remove the middle mold (13), and pull the middle shear molds (20) into the middle connecting groove (12) of the precast beam to remove the two middle shear molds (20).

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