Device for assembling and disassembling aluminum template in narrow space

Abstract

The utility model discloses a narrow space internal aluminum formwork mounting and dismounting device which comprises a cast-in-place formed reinforced concrete wall, a flue well is integrally formed at the corner of the reinforced concrete wall, and an internal formwork mechanism is arranged in the flue well. The inner formwork mechanism is of a structure with a square section formed by connecting an inner fixing aluminum formwork and an inner connecting aluminum formwork in the flue well, and a detachable check valve hole embedded part is fixedly installed in the flue well. According to the utility model, the mounting and dismounting are convenient, the aluminum template which is large in rigidity, not easy to deform and smooth in surface is used, the plastering-free effect can be achieved, and the flue well is formed by cast-in-place of reinforced concrete, so that the strength and durability of the flue are enhanced, the precision is improved, the quality problems of water seepage, cracking, hollowing and the like are effectively solved, and the production cost is reduced. The check valve hole embedded part is convenient to mount and dismount and can be recycled.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, in particular to an aluminum formwork installation and removal device inside a narrow space. Background Art

[0002] In high-rise buildings, there are many flue shafts, and the designed size of the flue shafts is uniformly 420mm×420mm; if the formwork is supported for one-time in-situ casting, the inner formwork cannot be removed; if the finished flue shaft is installed twice using the traditional process, quality defects such as water seepage, cracking, hollowing, and uneven straightness of the lines are likely to occur at the joint between the finished flue shaft and the structure. After installation, wet operations such as caulking, plastering, and waterproofing are required, with complicated processes, time-consuming labor, and high costs. In addition, during the construction process, the opening is left for a long time, with great potential safety hazards and a large amount of edge protection work; and after the project is completed and handed over, due to the too thin wall thickness of the traditional finished flue shaft, it is not heat-resistant, afraid of vibration, and easy to deform. During the use of wall tiles by residents, problems such as hollowing, cracking, or falling off are likely to occur after heating; therefore, many residents need to increase the protective layer through processes such as bricklaying, wire meshing, and plastering during decoration, greatly reducing the net usable area of the kitchen, and the housing rate and satisfaction also decrease accordingly. Content of the Utility Model

[0003] Aiming at the deficiencies of the existing technology, the utility model proposes an aluminum formwork installation and removal device inside a narrow space, which can realize the one-time integral in-situ casting of the flue shaft and can easily remove the internal aluminum formwork, solving the technical problem that construction workers cannot enter the narrow space for aluminum formwork installation and removal.

[0004] To achieve the above purposes, the utility model is realized through the following technical solutions: an aluminum formwork installation and removal device inside a narrow space, including a cast-in-place reinforced concrete wall, an outer aluminum formwork and an outer back rib are sequentially arranged on the outer side wall of the reinforced concrete wall, and are fixedly connected by a first pair of pull bolts and a first nut between adjacent outer back ribs. A flue shaft is integrally formed at the corner of the reinforced concrete wall, and an inner formwork mechanism is arranged inside the flue shaft. The inner formwork mechanism is formed by connecting two right-angle corner inner fixed aluminum formworks with bevels and two right-angle corner inner connecting aluminum formworks with bevels in the flue shaft into a square cross-section structure. The diagonally arranged inner connecting aluminum formworks are respectively fixedly connected with the inner back ribs as a whole, and the two ends of the inner back ribs respectively extend to the other diagonally arranged inner fixed aluminum formworks and are in contact and connected; a second pair of pull bolts sequentially pass through the outer back rib, the outer aluminum formwork, the inner connecting aluminum formwork and the inner back rib and are fixed by a second nut; a check valve hole is cast in place at one time at the position of the smoke exhaust hole in the flue shaft, and a detachable check valve hole embedded part is installed and fixed in the check valve hole.

[0005] Preferably, the bevel angles of the right-angle corner inner fixed aluminum formwork and the inner connecting aluminum formwork form an angle of 40° to 45° with the inner wall of the corresponding side flue shaft.

[0006] Preferably, the check valve hole embedded part includes a cylinder, a screw rod, and a fastening ring. The cylinder designed with a gradually changing diameter (big end and small end) is located inside the check valve hole. The rear end of the screw rod is fixedly connected to the inside of the cylinder. The front end of the screw rod with the screwed fastening ring passes through the outer aluminum formwork and contacts the outer side of the reinforced concrete wall. The rear end of the cylinder contacts the inner connecting aluminum formwork and the inner fixing aluminum formwork.

[0007] Preferably, the diameter of the cylinder near the end of the inner connecting aluminum formwork is smaller than the end near the outer aluminum formwork.

[0008] Preferably, the outer side wall of the inner backing rib is fixedly connected to the inner side wall of the inner fixing aluminum formwork, and both ends of the inner fixing aluminum formwork are respectively connected to the inner connecting aluminum formwork.

[0009] Preferably, the second tie bolt passes through the tapered sleeve inside the reinforced concrete wall. Baffles are respectively sleeved at both ends of the second tie bolt. The baffles are respectively located inside the inner backing rib and outside the outer backing rib. A second nut is screwed on the outer side of the baffle.

[0010] Preferably, the position of each layer of smoke exhaust opening in the flue shaft is upturned by 200 mm, and tie bolt holes are provided at the elevation position of 100 mm in the upturned part.

[0011] Preferably, shear wall steel bars and steel mesh sheets are tied to the inner walls of the reinforced concrete wall and the flue shaft. The specifications of the shear wall steel bars and the steel mesh sheets on the inner walls of the flue shaft are ø6@200 and are arranged in a single layer and bidirectionally. Beneficial Effects

[0012] The present utility model provides an internal aluminum formwork installation and removal device for a narrow space. Compared with the prior art, it has the following beneficial effects:

[0013] 1. For the internal aluminum formwork installation and removal device in the narrow space, by setting the inner formwork mechanism, its installation and removal are convenient. Aluminum formwork with high stiffness, not easily deformed, and smooth surface is used, which can achieve the effect of avoiding plastering. The flue shaft is cast in-situ with reinforced concrete, so the strength and durability of the flue are enhanced, the precision is improved, and quality problems such as water seepage, cracking, and hollowing are effectively solved. The inclination angle of the contact surface between the inner fixing aluminum formwork and the inner connecting aluminum formwork with the flue shaft wall it contacts is 40°, which is convenient for the removal of the inner fixing aluminum formwork.

[0014] 2. The installation and removal of the check valve hole embedded part are convenient, and it can be recycled and reused. Description of the Drawings

[0015] Figure 1 is a schematic structural diagram of the present utility model;

[0016] Figure 2 isFigure 1 Schematic diagram of the structure at position A;

[0017] Figure 3 Schematic diagram of the structure of the concrete wall;

[0018] Figure 4 Schematic diagram of the structure of the embedded part of the check valve hole;

[0019] Figure 5 Schematic diagram of the structure of the second pair of tie bolts, tapered sleeves and nut protectors in the present utility model;

[0020] Figure 6 Schematic diagram of the structure of the inner back formwork, inner fixed aluminum formwork and inner connecting aluminum formwork in the present utility model;

[0021] Figure 7 is Figure 6 Schematic diagram of the separated state between the components in;

[0022] In the figure: 1. First nut; 2. First pair of tie bolts; 3. Fixed block; 4. Baffle; 5. Second nut; 6. Outer back formwork; 7. Reinforced concrete wall; 8. Outer aluminum formwork; 9. Inner back formwork; 10. Inner fixed aluminum formwork; 11. Nut protector; 12. Inner connecting aluminum formwork; 13. Flue shaft; 14. Check valve hole; 15. Embedded part of the check valve hole; 16. Cylinder; 17. Fastening ring; 18. Screw rod; 19. Inner formwork mechanism; 20. Tapered sleeve; 21. Second pair of tie bolts. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0024] Please refer to Figures 1-7, an embodiment of the present utility model provides a technical solution: a device for installing and disassembling aluminum formwork inside a narrow space, and the materials used include: C30 concrete with the same strength grade as the main structure; ø6@200 steel bar mesh arranged in a single layer and two-way; fixing aluminum formwork and connecting aluminum formwork at two right-angle corners with a 40° angle groove; several back ribs at right-angle corners; a check valve embedded part configured at the flue check valve opening and capable of being disassembled and reused repeatedly; parts such as outer aluminum profile formwork, outer back ribs, tie bolts, nuts, and formwork anti-falling steel wires. It includes a plurality of outer aluminum formworks 8, and a plurality of outer back ribs 6 are provided on the outer side of the outer aluminum formwork 8. Fixed blocks 3 are provided between adjacent outer back ribs 6, and the fixed blocks 3 are fixedly connected to each other through first tie bolts 2 and first nuts 1. The plurality of outer aluminum formworks 8 are connected to the inner side wall of the reinforced concrete wall 7. A flue shaft 13 is integrally formed inside the reinforced concrete wall 7, and an inner formwork mechanism 19 is provided inside the flue shaft 13. The inner formwork mechanism 19 includes two inner fixed aluminum formworks 10, two connecting inner connecting aluminum formworks 12, and a plurality of inner back ribs 9. The outer side wall surface of the inner back rib 9 is fixedly connected to the inner side wall of the inner fixed aluminum formwork 10. The two ends of the inner fixed aluminum formwork 10 are respectively connected to the inner connecting aluminum formwork 12. A plurality of tapered sleeves 20 are provided inside the reinforced concrete wall 7. A second tie bolt 21 is provided inside the tapered sleeve 20. Two baffles 4 are sleeved on the outer side of the second tie bolt 21. Second nuts 5 are screwed on the outer side of the second tie bolt 21 and located outside the two baffles 4. The two ends of the second tie bolt 21 respectively pass through the outer aluminum formwork 8, the outer back rib 6, the inner connecting aluminum formwork 12, and the inner back rib 9, and a plurality of baffles 4 are respectively located inside the inner back rib 9 and outside the outer back rib 6.

[0025] During construction, first clean the base layer and carry out structural positioning and setting out. Bind the steel bars of the shear wall and the steel bar mesh of the flue shaft wall, and install and fix the embedded part 15 of the check valve hole at the designed position of the check valve hole. Then install the internal fixed aluminum formwork 10 and the internal connecting aluminum formwork 12. When installing the special-shaped corner aluminum formwork, release agent should be brushed. Pass the second tie bolt 21 with a tapered sleeve 20 through the internal back brace 9, the internal connecting aluminum formwork 12, the external aluminum formwork 8 and the external back brace 6, and tighten the second nut 5 for fastening. Put on the nut protection sleeve 11, and use the screw holes in the upward part of the flue for additional fixing and positioning. Finally, pass the first tie bolt 2 through the two fixing blocks 3, then tighten the first nut 1. After installation, concrete can be poured. Within 12h - 24h after pouring, find a suitable time to remove the internal formwork mechanism 19. Its installation and disassembly are convenient, and aluminum formwork is used. The aluminum formwork has high rigidity, is not easy to deform, has high precision and a smooth surface, and can achieve the effect of avoiding plastering. The flue shaft 13 is cast in one go with reinforced concrete, so the strength and durability of the flue shaft are enhanced, the precision is improved, and quality problems such as water seepage, cracking, and hollowing are effectively solved. The inclination angle of the contact surface between the internal fixed aluminum formwork 12 and the internal connecting aluminum formwork 10 is 40° of the included angle with the flue wall it contacts, which is convenient for the removal of the internal fixed aluminum formwork 12. When removing, first remove the internal fixed aluminum formwork 12 and then remove the internal connecting aluminum formwork 10.

[0026] The check valve hole 14 is integrally formed inside the reinforced concrete wall 7. The internal part of the check valve hole 14 is provided with an embedded part 15 of the check valve hole. The embedded part 15 of the check valve hole includes a cylinder 16, a screw 18 and a fastening ring 17. The cylinder 16 is located inside the check valve hole 14. The rear end of the screw 18 is fixedly connected with the inside of the cylinder 16. The front end of the screw 18 of the screwed fastening ring 17 passes through the external aluminum formwork 8. The rear end of the cylinder 16 contacts the internal connecting aluminum formwork 12 and the internal fixed aluminum formwork 10, and the rear end of the cylinder 16 contacts the side of the external aluminum formwork 8 close to the reinforced concrete wall 7. The fastening ring 17 is located at the end of the external aluminum formwork 8 away from the cylinder 16. The diameter of one end of the cylinder 16 close to the internal connecting aluminum formwork 12 is smaller than the end close to the external aluminum formwork 8. Pass the screw 18 through the external aluminum formwork 8 and rotate the fastening ring 17. The fastening ring 17 and the cylinder 16 clamp the external aluminum formwork 8. In this way, a circular check valve hole 14 will be formed when pouring concrete. After the concrete dries, remove the external aluminum formwork 8, and then remove the device. The installation and removal of the device are convenient, and it can be recycled and reused.

[0027] In this embodiment, the external cross-sectional dimension of the flue shaft 13 is 420mm × 420mm. The material of the flue shaft wall is fully cast-in-place reinforced concrete, and the wall on the side close to the structure shares the wall with the shear wall; in order to ensure the net usable area of the kitchen, the wall thickness on the non-shear wall side is designed to be 100mm, and a single-layer bidirectional steel bar mesh of ø6@100 is arranged and tied firmly to the shear wall. When pouring the structure, the flue shaft is cast in one go with the concrete of the same mix ratio.

[0028] The inner formwork of the flue duct shaft consists of two right-angled inner fixed aluminum formworks 10 each 3m long and two inner connecting aluminum formworks 12. The end parts of the sides of each formwork are designed as 40° bevels, and the bevels form a 40° angle with the adjacent flue duct shaft wall.

[0029] The nut protection sleeve 11 at the end of the nut is beneficial to protecting the nut, preventing concrete from splashing on the bolt rod or inside the nut during the pouring process and affecting formwork removal. During the concrete pouring process, a special person is assigned for supervision. First, pour a 200mm-thick shear wall, and then pour a 50mm-thick flue duct shaft wall. The mortar for lubricating the pipe can be used for pouring at this part. Therefore, the mortar for lubricating the pipe transported by the pump pipe before pouring should be collected in the hopper for standby, and the pouring process is supplemented by vibrating with a wooden stick or tapping with a hammer to make it dense.

[0030] At the external corner part of the flue duct shaft, the external aluminum formwork 8 and the external backing strip 6 are integrally used for reinforcement. The external aluminum formwork and the external backing strip should be connected into a whole in advance to ensure that the strength, stiffness and stability after reinforcement meet the requirements. During the construction process, since personnel cannot enter the inside of the flue duct shaft, the operators can only install, reinforce and remove the tie rods from the outside unilaterally. During installation, the tie rods are sequentially passed through the nut, the backing strip, the external aluminum formwork, the tapered sleeve, the inner aluminum formwork, the nut on the formwork, etc. from the outside to realize formwork reinforcement; during formwork removal, after the tie rods are screwed out from the outside, a round steel with a diameter one size smaller than that of the tie rod is inserted into each bolt rod hole to tighten the nut protection sleeve, and then the formwork is loosened by knocking inward with a hammer, and the aluminum formwork can be directly pulled out from the top of the flue duct shaft.

[0031] The opening of the check valve hole is cast in one piece on the spot, and a detachable tapered check valve hole embedded part with a gradually changing diameter is used for reservation. When installing the external aluminum formwork, the reserved tapered part is installed on the external aluminum formwork and fixed firmly. It is convenient for disassembly and assembly and can be recycled.

[0032] As Figure 6 shown, at the corner part of the flue duct shaft, the inner connecting aluminum formwork 12 arranged diagonally is welded to the inner backing strip 9 to form a whole. The inner backing strip extends to the inside of the other inner fixed aluminum formwork 10 arranged diagonally. The second tie rod 6 passes through the hole on the inner fixed aluminum formwork 10 for reinforcement. The integrity is relatively strong, which can effectively prevent formwork bulging.

[0033] The device in this embodiment is ingeniously designed from the perspective of formwork removal, and the formwork should be removed in a reasonable order during construction. Since the cross-section of the flue shaft is square, theoretically, when the bevel angle of the formwork joint on each side of the flue shaft is designed to be 45° with the included angle of the flue wall on that side, the aluminum formwork can just be removed. For safety and smoother formwork removal, the bevel angle is designed to be 40° with the corresponding side of the flue shaft wall. Therefore, during formwork removal, after simply screwing out the second pair of tie bolts from the outside, first remove the inner connecting aluminum formwork integrated with the inner backing rib, and then remove the inner fixed aluminum formwork not connected to the inner backing rib. For smooth formwork removal of the flue, the internal formwork of the flue part should be removed at an appropriate time within 12h - 24h after pouring. The formwork removal process should be carried out carefully, paying attention to the protection of the finished product.

[0034] To effectively ensure the construction quality of the flue shaft and prevent water seepage, the cast-in-place wall at the flue shaft position on each floor is turned up by 200mm. A pair of tie bolt holes is set at appropriate positions on the turned-up part on each side of the flue shaft, which can not only be used for the formwork support reinforcement of the previous concrete pouring but also for the formwork positioning reinforcement of the next concrete pouring.

[0035] Meanwhile, the content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0036] It should be noted that in the specification of this application, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0037] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for installing and removing aluminum formwork inside a narrow space, comprising a cast-in-place reinforced concrete wall (7), the outer side wall of the reinforced concrete wall (7) being provided with an outer aluminum formwork (8) and an outer back rib (6) in sequence, and adjacent outer back ribs (6) being fixedly connected by first tension bolts (2) and first nuts (1), characterized in that: A flue shaft (13) is integrally formed at the corner of the reinforced concrete wall (7), and an inner formwork mechanism (19) is arranged inside the flue shaft (13). The inner formwork mechanism (19) is composed of two right-angled inner fixed aluminum formworks (10) with grooves and two right-angled inner connecting aluminum formworks (12) with grooves, which are connected in the flue shaft to form a structure with a square cross-section. The diagonally arranged inner connecting aluminum formworks (12) are respectively fixedly connected to the inner back ribs (9) as a whole, and the two ends of the inner back ribs (9) extend to the other diagonally arranged inner fixed aluminum formworks (10) and are in contact and connected. The second tension bolts (21) pass through the outer back ribs (6), the outer aluminum formwork (8), the inner connecting aluminum formwork (12) and the inner back ribs (9) in sequence and are then fixedly connected by a second nut (5). A check valve hole (14) is cast-in-place at the position of the smoke exhaust hole in the flue shaft (13), and a detachable check valve hole embedded part (15) is installed and fixed in the check valve hole (14).

2. The device for installing and removing aluminum formwork in a narrow space according to claim 1 is characterized in that: The groove angles of the right-angled internal fixed aluminum template (10) and the internal connection aluminum template (12) form an angle of 40° to 45° with the inner wall of the corresponding side flue shaft.

3. The device for installing and removing aluminum formwork in a narrow space according to claim 1 is characterized in that: The check valve hole embedded part (15) comprises a cylinder (16), a screw (18) and a fastening ring (17); the cylinder (16) designed to have a gradually changing diameter reducer is located inside the check valve hole (14); the rear end of the screw (18) is fixedly connected to the inside of the cylinder (16); the front end of the screw (18) screwed to the fastening ring (17) passes through the outer aluminum template (8) and contacts the outer side of the reinforced concrete wall (7); the rear end of the cylinder (16) contacts the inner connecting aluminum template (12) and the inner fixed aluminum template (10).

4. The device for installing and removing aluminum formwork in a narrow space according to claim 3 is characterized in that: The diameter of the cylinder (16) at one end close to the inner connection aluminum template (12) is smaller than the diameter of the end close to the outer aluminum template (8).

5. The device for installing and removing aluminum formwork in a narrow space according to claim 1 is characterized in that: The outer side wall of the inner back rib (9) is fixedly connected to the inner side wall of the inner fixed aluminum template (10), and both ends of the inner fixed aluminum template (10) are respectively connected to the inner connecting aluminum template (12).

6. The device for installing and removing aluminum formwork in a narrow space according to claim 1, characterized in that: The second tension bolt (21) passes through a tapered sleeve (20) in the reinforced concrete wall (7), and baffles (4) are respectively sleeved on both ends of the second tension bolt (21), the baffles (4) are respectively located on the inner side of the inner back rib (9) and the outer side of the outer back rib (6), and the outer side of the baffle (4) is threaded with a second nut (5).

7. The device for installing and removing aluminum formwork in a narrow space according to claim 1, characterized in that: The position of each smoke exhaust hole in the flue shaft is turned up by 200mm, and tension bolt holes are provided at an elevation of 100mm at the turned-up position.

8. The device for installing and removing aluminum formwork in a narrow space according to claim 1, characterized in that: The reinforced concrete wall (7) and the inner wall of the flue shaft (13) are tied with shear wall steel bars and steel mesh. The shear wall steel bars and the steel mesh of the inner wall of the flue shaft have a size of ø6@200 and are arranged in a single layer and in two directions.

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