Prefabricated steel structure box indoor mold

Abstract

The utility model provides a prefabricated steel structure box indoor mold, and relates to the field of building construction. The prefabricated steel structure box chamber inner mold comprises a first inner mold unit, a second inner mold unit and a supporting unit. The first inner mold unit comprises a first mold plate and a second mold plate which are rotatably matched, the second inner mold unit comprises a third mold plate and a fourth mold plate which are rotatably matched, the first mold plate is in butt joint with the third mold plate, the second mold plate is in butt joint with the fourth mold plate, and the first mold plate, the second mold plate, the third mold plate and the fourth mold plate are matched to define an annular supporting structure; the supporting unit is arranged in a cylindrical cavity defined by the annular supporting structure and used for being connected with the first inner mold unit and the second inner mold unit so as to limit relative rotation of the first mold plate and the second mold plate, relative rotation of the third mold plate and the fourth mold plate and mutual approaching of the first inner mold unit and the second inner mold unit. The internal mold is high in structural strength, long in service life and low in construction cost.

Description

Technical Field

[0001] The utility model relates to the field of building construction, and more specifically, to a prefabricated steel structure box interior formwork. Background Art

[0002] In the prior art, when constructing box girders, common interior formworks for box chambers include wooden formworks, air bags, and foam boards, etc. The production of wooden formworks usually uses boards and wooden strips, etc. The materials should be hard, clean, without spiral grains, and without decay diseases. The bonding seams of the boards should be flat, without cracks and joints, and appropriate glue can be used to reinforce the interfaces of the boards. The structure of the wooden strips should be matched and the distance between each wooden strip should be kept as uniform as possible to avoid unnecessary gaps. Before installing the wooden formwork on site, it is necessary to ensure that the required tools and personnel are ready and the time is arranged according to the construction plan. First, determine the placement position of the formwork and the type of wood to be used, and then install the fixing parts on the top of the formwork. Then, place the wooden strips on the ground and apply appropriate waterproof agent on the wooden strips to ensure a longer service life of the wooden strips. Finally, install the boards on the wooden strips to ensure the overall flatness of the boards with the ground, and use appropriate fixing parts to fix the boards.

[0003] After research by the inventor, it is found that the interior formwork of the wooden formwork in the prior art has at least the following disadvantages:

[0004] Because the wooden formwork is exposed to the external environment and is greatly affected by the weather. After being exposed to humid conditions for a long time, the wooden boards will become rotten and unusable. Long-term use, overloading, or high humidity are all likely to cause the boards of the formwork to warp. The turnover rate of the wooden formwork is low, which affects the construction progress and increases the construction cost. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a prefabricated steel structure box interior formwork, which can reduce the influence of short service life caused by the external environment, reduce the rework rate, shorten the construction period, and can also be reused multiple times to reduce the construction cost.

[0006] The embodiments of the utility model are implemented as follows:

[0007] In a first aspect, the utility model provides a prefabricated steel structure box interior formwork, including:

[0008] The first inner mold unit, the second inner mold unit and the support unit; the first inner mold unit includes a first template and a second template that are rotatably fitted, the second inner mold unit includes a third template and a fourth template that are rotatably fitted, the first template is docked with the third template, the second template is docked with the fourth template, and the first template, the second template, the third template and the fourth template cooperate to define an annular support structure; the support unit is arranged in a cylindrical cavity surrounded by the annular support structure and is used to connect with the first inner mold unit and the second inner mold unit to limit the relative rotation of the first template and the second template, the relative rotation of the third template and the fourth template, and the mutual approach of the first inner mold unit and the second inner mold unit.

[0009] In an alternative embodiment, a strengthening structure is provided on the inner side surface of at least one of the first template, the second template, the third template and the fourth template.

[0010] Based on the above method, by providing the strengthening structure, the structural strength of the first template, the second template, the third template and the fourth template can be improved, the structure is stable during use, the support effect is good, it is not easy to deform, the pouring quality of the beam box chamber is high, and the service life of the first template, the second template, the third template and the fourth template is long, and the use cost is low.

[0011] In an alternative embodiment, the strengthening structure includes a plurality of strengthening plates arranged in a criss-cross pattern, and the strengthening plates are fixedly welded to the first template, the second template, the third template or the fourth template.

[0012] Based on the above solution, the strengthening structure is simple in structure, convenient for processing and manufacturing, low in cost, and has a good support effect, and can effectively improve the structural strength of the first template, the second template, the third template and the fourth template.

[0013] In an alternative embodiment, the support unit includes a first support mechanism, the first support mechanism is connected to both the first template and the second template at the same time, and the first support mechanism is used to limit the rotation of the third template and the fourth template in the direction of approaching each other; a first docking inclined surface is provided on the first template, a second docking inclined surface is provided on the second template, a third docking inclined surface is provided on the third template, and a fourth docking inclined surface is provided on the fourth template, the first docking inclined surface is in contact with the third docking inclined surface, and the first template is used to limit the rotation of the third template in the direction of approaching the fourth template; the second docking inclined surface is in contact with the fourth docking inclined surface, and the second template is used to limit the rotation of the fourth template in the direction of approaching the third template.

[0014] Based on the above solution, the first support mechanism can limit the inward or outward rotation of the first template and the second template. At the same time, since the first template supports the third template and the second template supports the fourth template, during pouring, when subjected to the gravity of the concrete, the third template and the fourth template will not rotate inward relative to each other, with stable force and stable support, high safety during the pouring process, and high construction quality.

[0015] In an alternative embodiment, the first support mechanism includes a first drive sleeve, a first threaded rod, and a second threaded rod. The first drive sleeve is provided with a first thread groove and a second thread groove that are coaxial and arranged at intervals, and the helical directions of the first thread groove and the second thread groove are opposite; the first threaded rod is screwed to the first thread groove, the second threaded rod is screwed to the second thread groove, the first threaded rod is connected to the first template, the second threaded rod is connected to the second template, and the first drive sleeve is used to drive the first threaded rod and the second threaded rod to approach or move away synchronously.

[0016] Based on the above solution, when using the first support mechanism, the length of the first support mechanism can be adjusted adaptively according to the distance between the first template and the second template, improving the flexibility of the use of the first support mechanism and expanding the scope of use. Moreover, adjusting the length of the first support mechanism according to the actual situation can better adapt to the distance between the first template and the second template, providing more stable support.

[0017] In an alternative embodiment, fixing rings are provided on both the first template and the second template. A first fixing rod with an angle to the first threaded rod is provided on the first threaded rod, and a second fixing rod with an angle to the second threaded rod is provided on the second threaded rod. The first fixing rod and the second fixing rod are respectively inserted into the two fixing rings.

[0018] Based on the above solution, after the length of the first support mechanism is adjusted, the first fixing rod and the second fixing rod are respectively inserted into the two fixing rings, thereby realizing the support of the first support mechanism for the first template and the second template, with convenient operation and very convenient disassembly and assembly.

[0019] In an alternative embodiment, the support unit further includes a second support mechanism. The second support mechanism is simultaneously connected to the first template and the third template, or the second support mechanism is simultaneously connected to the second template and the fourth template. The second support mechanism is used to limit the first template and the third template from approaching each other, or the second support mechanism is used to limit the second template and the fourth template from approaching each other.

[0020] Based on the above solution, after the first template and the second template are respectively engaged with the third template and the fourth template, the first docking inclined surface and the third docking inclined surface are in contact, and the second docking inclined surface and the fourth docking inclined surface are in contact. By locking the first template and the third template with the second support mechanism, the third docking inclined surface can be pressed against the first docking inclined surface, and the fourth docking inclined surface can be pressed against the second docking inclined surface. The first template and the second template play a role in supporting the third template and the fourth template, and the sealing performance can also be improved. Moreover, after the length of the second support mechanism is determined, the distance between the first template and the third template is also determined. The first template and the third template neither approach each other nor move away from each other, and their positions are stable and reliable.

[0021] In an alternative embodiment, the second support mechanism is arranged as a linear telescopic mechanism.

[0022] Based on the above solution, the length of the second support mechanism can be adjusted adaptively according to the on-site installation conditions, and the application range is wide.

[0023] In an alternative embodiment, the second support mechanism includes a second driving sleeve, a third threaded rod, and a fourth threaded rod. The second driving sleeve is provided with a third thread groove and a fourth thread groove that are coaxial and arranged at intervals, and the helix directions of the third thread groove and the fourth thread groove are opposite; the third threaded rod is screwed with the third thread groove, the fourth threaded rod is screwed with the fourth thread groove, the third threaded rod is connected to the second template, the fourth threaded rod is connected to the fourth template, and the second driving sleeve is used to drive the third threaded rod and the fourth threaded rod to approach or move away synchronously to adjust the distance between the first inner mold unit and the second inner mold unit.

[0024] Based on the above solution, by rotating the second driving sleeve to adjust the positions of the third threaded rod and the fourth threaded rod relative to the driving sleeve, the operation is convenient and the adjustment efficiency is high.

[0025] In an alternative embodiment, connecting plates are provided on both sides of the first template, the second template, the third template, and the fourth template in the extending direction of the axis of the cylindrical cavity, and fixing holes are provided on the connecting plates for passing through fixing bolts.

[0026] Based on the above solution, the sealing plate can be connected to the connecting plate through fixing bolts to close the port of the annular cavity and prevent the slurry from entering the annular cavity.

[0027] The beneficial effects of the embodiments of the present utility model are:

[0028] In summary, for the prefabricated steel structure box interior formwork provided in this embodiment, the first formwork, the second formwork, the third formwork, and the fourth formwork are all set as steel structure members. The first formwork, the second formwork, the third formwork, and the fourth formwork cooperate to define an annular support structure. The outer contour of the cross-section of the annular support structure is basically the same as the cross-section contour of the box chamber. During pouring, the concrete slurry wraps around the annular support structure. After the pouring is completed, the concrete structure is cured for a set time, and then the first formwork, the second formwork, the third formwork, and the fourth formwork can be disassembled to complete the in-situ construction of the box chamber. When disassembling the formwork, first release the restriction of the support unit on the first inner formwork unit and the second inner formwork unit, and rotate the first formwork, the second formwork, the third formwork, and the fourth formwork. The demoulding is convenient, and the first formwork, the second formwork, the third formwork, and the fourth formwork are connected together under the action of the support unit and can move synchronously, which is convenient for operation. The first formwork, the second formwork, the third formwork, and the fourth formwork have high structural strength and long service life, can be reused multiple times, and have low construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0030] Figure 1 It is a cross-sectional view schematic diagram of the prefabricated steel structure box interior formwork of the embodiment of the present invention;

[0031] Figure 2 It is a schematic diagram of the prefabricated steel structure box interior formwork of the embodiment of the present invention;

[0032] Figure 3 It is a schematic diagram of the first support mechanism of the embodiment of the present invention;

[0033] Figure 4 It is a schematic diagram of the second support mechanism of the embodiment of the present invention.

[0034] ICON:

[0035] 001 - cylindrical cavity; 100 - first inner mold unit; 110 - first template; 111 - first docking inclined plane; 120 - second template; 121 - second docking inclined plane; 130 - fixing ring; 140 - strengthening structure; 200 - second inner mold unit; 210 - third template; 211 - third docking inclined plane; 220 - fourth template; 221 - fourth docking inclined plane; 300 - support unit; 310 - first support mechanism; 311 - first driving sleeve; 312 - first threaded rod; 313 - second threaded rod; 314 - first fixing rod; 315 - second fixing rod; 320 - second support mechanism; 321 - second driving sleeve; 322 - third threaded rod; 323 - fourth threaded rod; 324 - third fixing rod; 325 - fourth fixing rod; 400 - connecting plate; 410 - fixing hole. Detailed implementation manners

[0036] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated herein can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0038] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0039] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0040] In addition, terms such as "horizontal" and "vertical" do not require the components to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0041] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and limited, the terms "arranged", "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0042] In the prior art, when constructing a bridge box chamber formwork, the wooden formwork is exposed to humid conditions for a long time, and the wooden boards will become rotten and unusable, which affects the construction progress. Moreover, the formwork cannot be reused, resulting in high costs.

[0043] In view of this, the designer provides a prefabricated steel structure box inner formwork, which has high structural strength, is not easily deformed, and has high construction quality; at the same time, it is not easily corroded and damaged, has a long service life, can be reused multiple times, and has low construction costs.

[0044] Please combine Figures 1 - 4 , in this embodiment, the prefabricated steel structure box inner formwork includes a first inner formwork unit 100, a second inner formwork unit 200, and a support unit 300; the first inner formwork unit 100 includes a first template 110 and a second template 120 that are rotatably fitted, the second inner formwork unit 200 includes a third template 210 and a fourth template 220 that are rotatably fitted, the first template 110 is butted against the third template 210, the second template 120 is butted against the fourth template 220, and the first template 110, the second template 120, the third template 210, and the fourth template 220 cooperate to define an annular support structure; the support unit 300 is disposed in the cylindrical cavity 001 surrounded by the annular support structure and is used to connect with the first inner formwork unit 100 and the second inner formwork unit 200 to limit the relative rotation of the first template 110 and the second template 120, the relative rotation of the third template 210 and the fourth template 220, and the mutual approach of the first inner formwork unit 100 and the second inner formwork unit 200.

[0045] Continuing from the above, the working mode of the prefabricated steel structure box inner formwork provided in this embodiment is as follows:

[0046] The first formwork 110, the second formwork 120, the third formwork 210, and the fourth formwork 220 are all set as steel structural members. The first formwork 110, the second formwork 120, the third formwork 210, and the fourth formwork 220 cooperate to define an annular support structure. The outer contour of the cross-section of the annular support structure is substantially the same as the cross-sectional contour of the box chamber. During pouring, the concrete slurry wraps around the annular support structure. After the pouring is completed, the concrete structure is cured for a set time, and then the first formwork 110, the second formwork 120, the third formwork 210, and the fourth formwork 220 can be disassembled to complete the in-situ construction of the box chamber. When disassembling the formwork, first release the restriction of the support unit 300 on the first inner formwork unit 100 and the second inner formwork unit 200, and rotate the first formwork 110, the second formwork 120, the third formwork 210, and the fourth formwork 220. The demoulding is convenient, and the first formwork 110, the second formwork 120, the third formwork 210, and the fourth formwork 220 are connected together under the action of the support unit 300 and can move synchronously, which is convenient for operation. The first formwork 110, the second formwork 120, the third formwork 210, and the fourth formwork 220 have high structural strength, long service life, can be reused multiple times, and have low construction costs.

[0047] It should be understood that the bottom of the annular support structure is supported by a steel bar structure to be poured in the concrete.

[0048] The following embodiments illustrate the details of the precast steel structure box chamber inner formwork provided by the present application by way of example.

[0049] Please combine Figure 1 , in this embodiment, optionally, a strengthening structure 140 is provided on the inner side surface of at least one of the first formwork 110, the second formwork 120, the third formwork 210, and the fourth formwork 220. For example, in this embodiment, the first formwork 110, the second formwork 120, the third formwork 210, and the fourth formwork 220 are all provided with the strengthening structure 140.

[0050] Designed in this way, by providing the strengthening structure 140, the structural strength of the first formwork 110, the second formwork 120, the third formwork 210, and the fourth formwork 220 can be improved. During use, the structure is stable, the support effect is good, it is not easy to deform, the pouring quality of the beam box chamber is high, and the service life of the first formwork 110, the second formwork 120, the third formwork 210, and the fourth formwork 220 is long, and the use cost is low.

[0051] Optionally, the strengthening structure 140 includes a plurality of strengthening plates arranged in a criss-cross pattern, and the strengthening plates are fixedly welded to the first formwork 110, the second formwork 120, the third formwork 210, or the fourth formwork 220. The structure of the strengthening structure 140 is simple, convenient for processing and manufacturing, low in cost, and has a good support effect, and can effectively improve the structural strength of the first formwork 110, the second formwork 120, the third formwork 210, and the fourth formwork 220.

[0052] Please combine with Figure 1 Figure 1 , optionally, the first template 110, the second template 120, the third template 210, and the fourth template 220 are all set as bent plates, and the cross-sectional shapes of the first template 110, the second template 120, the third template 210, and the fourth template 220 are approximately L-shaped. Moreover, the outer sides at the bent positions of the first template 110, the second template 120, the third template 210, and the fourth template 220 are all beveled corners, which are not prone to stress concentration, not prone to cracking, have a stable structure, a long service life, and are convenient for subsequent demolding.

[0053] In this embodiment, optionally, the support unit 300 includes a first support mechanism 310. The first support mechanism 310 is simultaneously connected to the first template 110 and the second template 120. The first support mechanism 310 is used to restrict the third template 210 and the fourth template 220 from rotating towards each other. A first docking inclined surface 111 is provided on the first template 110, a second docking inclined surface 121 is provided on the second template 120, a third docking inclined surface 211 is provided on the third template 210, and a fourth docking inclined surface 221 is provided on the fourth template 220. The first docking inclined surface 111 is in contact with the third docking inclined surface 211, and the first template 110 is used to restrict the third template 210 from rotating towards the fourth template 220. The second docking inclined surface 121 is in contact with the fourth docking inclined surface 221, and the second template 120 is used to restrict the fourth template 220 from rotating towards the third template 210.

[0054] With such a design, the first support mechanism 310 can restrict the first template 110 and the second template 120 from rotating inwards or outwards. At the same time, since the first template 110 supports the third template 210 and the second template 120 supports the fourth template 220, during pouring, when subjected to the gravity of the concrete, the third template 210 and the fourth template 220 will not rotate inwards relative to each other, the force is stable, the support is stable, the safety during the pouring process is high, and the construction quality is high.

[0055] Please combine with Figure 2 and Figure 3 Figure 3 , optionally, the first support mechanism 310 includes a first driving sleeve 311, a first threaded rod 312, and a second threaded rod 313. The first driving sleeve 311 is provided with a first thread groove and a second thread groove that are coaxial and arranged at intervals, and the first thread groove and the second thread groove have opposite helix directions. The first threaded rod 312 is screwed into the first thread groove, the second threaded rod 313 is screwed into the second thread groove, the first threaded rod 312 is connected to the first template 110, the second threaded rod 313 is connected to the second template 120, and the first driving sleeve 311 is used to drive the first threaded rod 312 and the second threaded rod 313 to approach or move away from each other synchronously.

[0056] When the first support mechanism 310 is used, the length of the first support mechanism 310 can be adaptively adjusted according to the distance between the first template 110 and the second template 120, improving the flexibility of the use of the first support mechanism 310 and expanding the scope of use. Moreover, adjusting the length of the first support mechanism 310 according to the actual situation can better adapt to the distance between the first template 110 and the second template 120, providing more stable support. Also, the length adjustment can be achieved by rotating the first drive sleeve 311, which is convenient to operate.

[0057] Furthermore, fixing rings 130 are provided on both the first template 110 and the second template 120. A first fixing rod 314 with an angle to the first threaded rod 312 is provided on the first threaded rod 312, and a second fixing rod 315 with an angle to the second threaded rod 313 is provided on the second threaded rod 313. The first fixing rod 314 and the second fixing rod 315 are respectively inserted into the two fixing rings 130. After the length of the first support mechanism 310 is initially adjusted, the first fixing rod 314 and the second fixing rod 315 are respectively inserted into the two fixing rings 130, thus realizing the support of the first support mechanism 310 for the first template 110 and the second template 120. Then, according to the on-site situation, the first drive sleeve 311 can be rotated to achieve fine adjustment, further improving the tightness of the cooperation between the first support mechanism 310 and the first template 110 and the second template 120.

[0058] It should be noted that the first threaded rod 312 and the first fixing rod 314 can be perpendicularly arranged, and the second threaded rod 313 and the second fixing rod 315 can be perpendicularly arranged.

[0059] In this embodiment, optionally, the support unit 300 further includes a second support mechanism 320. The second support mechanism 320 is simultaneously connected to the first template 110 and the third template 210, or the second support mechanism 320 is simultaneously connected to the second template 120 and the fourth template 220. The second support mechanism 320 is used to limit the first template 110 and the third template 210 from approaching each other, or the second support mechanism 320 is used to limit the second template 120 and the fourth template 220 from approaching each other.

[0060] With such a design, when the first template 110 and the second template 120 are respectively mated with the third template 210 and the fourth template 220, the first docking inclined surface 111 and the third docking inclined surface 211 are in contact, and the second docking inclined surface 121 and the fourth docking inclined surface 221 are in contact. By locking the first template 110 and the third template 210 through the second support mechanism 320, the third docking inclined surface 211 can be pressed against the first docking inclined surface 111, and the fourth docking inclined surface 221 can be pressed against the second docking inclined surface 121. The first template 110 and the second template 120 play a role in supporting the third template 210 and the fourth template 220, and the sealing performance can also be improved. Moreover, after the length of the second support mechanism 320 is determined, the distance between the first template 110 and the third template 210 is also determined. The first template 110 and the third template 210 neither approach nor move away from each other, and their positions are stable and reliable.

[0061] Optionally, the second support mechanism 320 is set as a linear telescopic mechanism. The length of the second support mechanism 320 can be adaptively adjusted according to the on-site installation conditions, and it has a wide range of applications.

[0062] Please combine Figure 2 and Figure 4 Furthermore, the second support mechanism 320 includes a second driving sleeve 321, a third threaded rod 322, and a fourth threaded rod 323. The second driving sleeve 321 is provided with a third thread groove and a fourth thread groove that are coaxial and arranged at intervals, and the spiral directions of the third thread groove and the fourth thread groove are opposite; the third threaded rod 322 is screwed with the third thread groove, and the fourth threaded rod 323 is screwed with the fourth thread groove. The third threaded rod 322 is connected to the second template 120, and the fourth threaded rod 323 is connected to the fourth template 220. The second driving sleeve 321 is used to drive the third threaded rod 322 and the fourth threaded rod 323 to approach or move away synchronously to adjust the distance between the first inner mold unit 100 and the second inner mold unit 200. During operation, by rotating the second driving sleeve 321, the positions of the third threaded rod 322 and the fourth threaded rod 323 relative to the driving sleeve are adjusted, which is convenient to operate and has high adjustment efficiency.

[0063] It should be understood that a third fixing rod 324 can be provided on the third threaded rod 322, and a fourth fixing rod 325 can be provided on the fourth threaded rod 323. The third fixing rod 324 is perpendicular to the third threaded rod 322, and the fourth fixing rod 325 is perpendicular to the fourth threaded rod 323. Fixing rings 130 can be provided on the second template 120 and the fourth template 220, and the third fixing rod 324 and the fourth fixing rod 325 are inserted and matched with the corresponding fixing rings 130, which is convenient to operate.

[0064] To improve the operation flexibility, a handle or a clamping portion can be provided outside the first driving sleeve 311 and the second driving sleeve 321, and the clamping portion can be clamped and cooperated with tools such as a wrench. It should be understood that after the first fixing rod 314 and the second fixing rod 315 are inserted into the fixing ring 130, by rotating the first driving sleeve 311, it is possible to prevent the first threaded rod 312 and the second threaded rod 313 from rotating along with the first driving sleeve 311, thereby realizing fine length adjustment. Similarly, the second support mechanism 320 and the fixing ring 130 can cooperate to achieve the same function.

[0065] It should be noted that the fixing ring 130 can be a circular ring, the axis of the fixing ring 130 is parallel to the axis of the inner mold, the axis of the inner mold is parallel to the rotation axes of the first template and the second template, and the rotation axes of the first template and the second template are parallel to the rotation axes of the third template and the fourth template. During construction, the first support mechanism and the second support mechanism can be inserted into or pulled out of the fixing ring along the axis of the inner mold, which is convenient for operation.

[0066] Optionally, connecting plates 400 are provided on both sides of the first template 110, the second template 120, the third template 210, and the fourth template 220 in the extending direction of the axis of the cylindrical cavity 001. Fixing holes 410 are provided on the connecting plates 400 for passing through fixing bolts. After the formwork is erected, the sealing plate can be connected to the connecting plate 400 through the fixing bolts, and the sealing plate can seal the port of the annular cavity to prevent the slurry from entering the annular cavity and improve the construction safety.

[0067] In addition, the first template 110 and the second template 120 can be rotatably cooperated through hinges, and the third template 210 and the fourth template 220 can be rotatably cooperated through hinges.

[0068] For the prefabricated steel structure box inner mold provided in this embodiment, the first template 110, the second template 120, the third template 210, and the fourth template 220 are all set as steel structure members, with high structural strength and long service life, which improves the turnover rate and utilization rate of the formwork and helps to shorten the construction duration. At the same time, the first template 110, the second template 120, the third template 210, and the fourth template 220 are supported by the cooperation of the first support mechanism 310 and the second support mechanism 320, with stable and reliable structure, and are not prone to defects such as slurry leakage and formwork bulging, and are not likely to cause losses of formwork and other materials.

[0069] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, various changes and modifications can be made to the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A prefabricated steel structure box interior mold, characterized in that: include: A first inner mold unit (100), a second inner mold unit (200) and a supporting unit (300); the first inner mold unit (100) includes a first template (110) and a second template (120) that are rotatably matched, the second inner mold unit (200) includes a third template (210) and a fourth template (220) that are rotatably matched, the first template (110) is docked with the third template (210), the second template (120) is docked with the fourth template (220), the first template (110) and the second template (120) are connected to each other, and the first template (110) and the second template (120) are connected to each other. The template (120), the third template (210) and the fourth template (220) cooperate to define an annular support structure; the support unit (300) is arranged in a cylindrical cavity (001) surrounded by the annular support structure, and is used to connect with the first inner mold unit (100) and the second inner mold unit (200) to limit the relative rotation of the first template (110) and the second template (120), the relative rotation of the third template (210) and the fourth template (220), and the first inner mold unit (100) and the second inner mold unit (200) to approach each other.

2. The prefabricated steel structure box interior mold according to claim 1, characterized in that: A reinforcing structure (140) is provided on the inner side surface of at least one of the first template (110), the second template (120), the third template (210) and the fourth template (220).

3. The prefabricated steel structure box interior mold according to claim 2 is characterized in that: The reinforcement structure (140) comprises a plurality of reinforcement plates arranged in a crisscross pattern, and the reinforcement plates are welded and fixed to the first template (110), the second template (120), the third template (210) or the fourth template (220).

4. The prefabricated steel structure box interior mold according to claim 1, characterized in that: The support unit (300) comprises a first support mechanism (310), the first support mechanism (310) being connected to the first template (110) and the second template (120) at the same time, the first support mechanism (310) being used to limit the third template (210) and the fourth template (220) from rotating in a direction approaching each other; the first template (110) is provided with a first docking inclined surface (111), the second template (120) is provided with a second docking inclined surface (121), and the third template (210) is provided with a third docking inclined surface (112). A docking bevel (211), the fourth template (220) is provided with a fourth docking bevel (221), the first docking bevel (111) is in contact with the third docking bevel (211), and the first template (110) is used to limit the third template (210) from rotating in a direction approaching the fourth template (220); the second docking bevel (121) is in contact with the fourth docking bevel (221), and the second template (120) is used to limit the fourth template (220) from rotating in a direction approaching the third template (210).

5. The prefabricated steel structure box interior mold according to claim 4, characterized in that: The first supporting mechanism (310) comprises a first driving sleeve (311), a first threaded rod (312) and a second threaded rod (313); the first driving sleeve (311) is provided with a first thread groove and a second thread groove which are coaxially and spaced apart; the first thread groove and the second thread groove have opposite rotation directions; the first threaded rod (312) is screwed to the first thread groove, the second threaded rod (313) is screwed to the second thread groove, the first threaded rod (312) is connected to the first template (110), the second threaded rod (313) is connected to the second template (120), and the first driving sleeve (311) is used to drive the first threaded rod (312) and the second threaded rod (313) to move closer or farther synchronously.

6. The prefabricated steel structure box interior mold according to claim 5, characterized in that: The first template (110) and the second template (120) are both provided with a fixing ring (130); the first threaded rod (312) is provided with a first fixing rod (314) which has an angle with the first threaded rod (312); the second threaded rod (313) is provided with a second fixing rod (315) which has an angle with the second threaded rod (313); the first fixing rod (314) and the second fixing rod (315) are respectively passed through the two fixing rings (130).

7. The prefabricated steel structure box interior mold according to claim 4, characterized in that: The support unit (300) further includes a second support mechanism (320), wherein the second support mechanism (320) is simultaneously connected to the first template (110) and the third template (210), or the second support mechanism (320) is simultaneously connected to the second template (120) and the fourth template (220), and the second support mechanism (320) is used to limit the first template (110) and the third template (210) from approaching each other, or the second support mechanism (320) is used to limit the second template (120) and the fourth template (220) from approaching each other.

8. The prefabricated steel structure box interior mold according to claim 7, characterized in that: The second supporting mechanism (320) is configured as a linear telescopic mechanism.

9. The prefabricated steel structure box interior mold according to claim 8, characterized in that: The second supporting mechanism (320) comprises a second driving sleeve (321), a third threaded rod (322) and a fourth threaded rod (323); the second driving sleeve (321) is provided with a third thread groove and a fourth thread groove which are coaxial and spaced apart, and the third thread groove and the fourth thread groove have opposite rotation directions; the third threaded rod (322) is threadedly connected to the third thread groove, and the fourth threaded rod (323) is threadedly connected to the fourth thread groove; the third threaded rod (322) is connected to the second template (120), and the fourth threaded rod (323) is connected to the fourth template (220); the second driving sleeve (321) is used to drive the third threaded rod (322) and the fourth threaded rod (323) to move closer or farther synchronously, so as to adjust the distance between the first inner mold unit (100) and the second inner mold unit (200).

10. The prefabricated steel structure box interior mold according to claim 1, characterized in that: The first template (110), the second template (120), the third template (210) and the fourth template (220) are provided with connecting plates (400) on both side surfaces in the extension direction of the axis of the cylindrical cavity (001), and the connecting plates (400) are provided with fixing holes (410) for passing fixing bolts.

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