An external wall concrete structure flue formwork device

Abstract

The present invention discloses a formwork device for a flue of an external wall concrete structure, specifically relating to the technical field of flue construction. It includes guiding columns, and a plurality of socket ring blocks are arranged at equal intervals from top to bottom on the outer wall of the guiding columns. A synchronous linkage mechanism is provided at the top of the socket ring blocks; the synchronous linkage mechanism includes a plurality of downward pressing support blocks arranged at equal intervals in a circular ring at the top of the socket ring blocks. The present invention uses the synchronous linkage mechanism to start a plurality of hydraulic cylinders. The socket ring blocks drive a plurality of support shafts to move upward, and the four extrusion support plates all contract and approach the guiding columns. The four extrusion support plates no longer support the inner walls of the right-angle inner formwork, the first corner formwork, the first middle formwork, the second corner formwork, the second middle formwork, and the third corner formwork. The formwork can be disassembled synchronously and retracted. There is no need to enter the flue to disassemble the nuts one by one or install the nuts one by one, which improves the demoulding or mould installation efficiency and the overall construction efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of flue construction, and more specifically to a flue template device for an exterior wall concrete structure. Background Art

[0002] The kitchen flue is a vertical pipe used to exhaust oil smoke. It is the main component of the shared exhaust pipe system of residential kitchens. A flue must be set up where there is kitchen exhaust smoke. Unorganized emission of oil smoke is not allowed. Therefore, when making an external wall mounted flue, it is necessary to use various templates to splice to form a gap, and then pour concrete into the gap and wait for it to solidify to form an external wall mounted flue.

[0003] After searching the existing public documents, the patent publication number CN114961239A discloses an aluminum mold device and construction method for a cast-in-place kitchen flue. In current residential projects, most of the kitchen flue exhaust systems are finished flues that are installed twice. The construction is cumbersome and must be manually transported and installed after the construction elevator is installed. The finished flues have many defects, which can easily lead to floor leakage at the upper and lower interfaces of the flue. Bumps during transportation and aging of the material lead to subsequent smoke leakage in the flue. The conventional wooden formwork system has many safety hazards of falling from high places because the gaps in the flue are small and workers cannot demold. This makes it impossible for the kitchen flue to be cast in place in one go. This patent improves the construction efficiency of the installation and disassembly of the flue formwork, so that the flue can be cast in place in one go without leaking smoke, with good molding quality, and without the need for secondary flue construction. However, the mold device still has the following defects;

[0004] During use, although the above-mentioned mold device can rely on the rotation connection of the nuts to complete the splicing of the template, personnel are still required to enter the flue to rotate and fix each nut during the splicing. During the later demolding, multiple nuts inside the flue need to be rotated and disassembled, and the mold cannot be quickly and synchronously installed or demolded. Therefore, the later demolding efficiency is low, which reduces the overall construction efficiency. For this reason, it is necessary to provide an exterior wall concrete structure flue template device. Summary of the invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a flue template device for an exterior wall concrete structure.

[0006] To achieve the above object, the present invention provides the following technical solution: a flue formwork device for an exterior wall concrete structure, comprising a guide pillar, a plurality of sleeve ring blocks are arranged equidistantly from top to bottom on the outer wall of the guide pillar, and a synchronous linkage mechanism is provided on the top of the sleeve ring block;

[0007] The camming mechanism comprises a plurality of downward pressure support blocks which are equidistantly distributed in a circular ring at the top of the sleeve ring block, and a hydraulic cylinder is provided at the top of each downward pressure support block, and a positioning linkage assembly is provided on one side of the hydraulic cylinder. The outer wall of the sleeve ring block is equidistantly embedded with a plurality of support shaft rods in a circular ring. The outer wall of the support shaft rod is rotatably connected to a hinge sleeve rod, and the outer wall of the hinge sleeve rod is rotatably connected to a sleeve sliding recess near its bottom position. Both sides of the sleeve sliding recess are welded with an inclined support plate, and an extrusion support plate is welded at one end of the inclined support plate. The inner side of the sleeve sliding recess is horizontally slidably connected to a guide sliding rod, and a distribution support assembly is provided under the sleeve sliding recess, and the inner walls of the plurality of sleeve ring blocks are vertically slidably connected to the outer wall of the guide pillar, and the pushing end of the hydraulic cylinder and the top of the sleeve ring block are fixedly connected to the downward pressure support block, and the plurality of extrusion support plates are arranged in a rectangular equidistant distribution, and the extrusion support plates are made of stainless steel.

[0008] Preferably, the outer wall of the sleeve sliding block is horizontally slidably connected with a ring guide plate welded to one end of the guide slide rod, the inner wall of the guide slide rod is welded to the outer wall of the guide pillar, and a linkage push rod is provided on one side of the sleeve sliding block and on both sides of the outer wall of the guide slide rod, and the two ends of the linkage push rod are respectively fixedly connected to one side of the extrusion support plate and one side of the sleeve sliding block, a support plate is welded to the top of the guide pillar, a lifting hook is fixedly connected to the top of the support plate, and a through hole with a circular vertical cross-section is penetrated on one side of the lifting hook.

[0009] Preferably, the positioning linkage assembly includes a linkage bracket arranged on one side of the hydraulic cylinder, and a reinforcement inner ring and a reinforcement outer ring are sequentially provided at the bottom end of the linkage bracket from the inside to the outer wall, a plurality of S-shaped support blocks are fixed in a circular ring with equal distances between the reinforcement inner ring and the reinforcement outer ring, and four first concave addition blocks are fixed in a circular ring with equal distances at the bottom end of the reinforcement outer ring, and a second concave addition block and a third concave addition block are sequentially arranged from left to right on one side of each first concave addition block, cross brackets are welded on both sides of the outer wall of the second concave addition block, and an outer frame template is vertically inserted into the inner wall of the first concave addition block.

[0010] Preferably, the bottom end lengths of the inner walls of the first concave adding block, the second concave adding block and the third concave adding block are all smaller than the top end lengths of the inner walls thereof, the inner wall of the outer frame template is movably connected with a right-angle inner template, one side of the right-angle inner template is movably connected with a first corner template, a first middle template is vertically slidably connected with one side of the first corner template, and a second corner template is provided on one side of the first middle template, a second middle template is provided on one side of the second corner template, a third corner template is vertically slidably connected with one side of the second middle template, the first middle template and the second middle template are both vertically slidably connected with the second corner template, large lifting ears are welded on the tops of the right-angle inner template, the first corner template, the second corner template and the third corner template, and two small lifting ears are fixed on the tops of the first middle template and the second middle template.

[0011] Preferably, the distribution support assembly includes an inclined support block arranged below the sleeve sliding recess, and a ring support block is fixed to the bottom end of the outer frame template, and a support column is fixed to the inner wall of the ring support block, and one end of the support column is provided with a reinforcement ring and a limit ring in sequence from top to bottom, and the inner walls of the reinforcement ring and the limit ring are welded to the outer wall of the guide pillar.

[0012] Technical effects and advantages of the present invention:

[0013] The present invention adopts a synchronous linkage mechanism to start multiple hydraulic cylinders, the hydraulic cylinder drives the downward pressure support block to move upward, the downward pressure support block drives the sleeve ring block to move vertically upward along the outer wall of the guide pillar, the sleeve ring block drives multiple support shafts to move upward, and the four extrusion support plates are all retracted to approach the guide pillar, so that the four extrusion support plates no longer support the inner walls of the right-angle inner template, the first corner template, the first middle template, the second corner template, the second middle template, and the third corner template, and the template can be retracted and disassembled synchronously without entering the flue to disassemble the nuts one by one, or to install the nuts one by one. Therefore, the template can be disassembled or installed synchronously, thereby improving the demoulding or mold installation efficiency and the overall construction efficiency.

[0014] The present invention adopts a positioning linkage component to enable the lifting hook to drive the support plate to move upward, the support plate drives the guide pillar to move upward, the linkage bracket drives the reinforcement inner ring to move multiple S-shaped support blocks upward, the S-shaped support block drives the reinforcement outer ring to move the first concave addition block upward, the first concave addition block, the second concave addition block and the third concave addition block are all separated from the outer wall of the outer frame template, and then the various lifting hooks of the lifting machine are placed inside the multiple small lifting ears and the multiple large lifting ears, the first middle template and the second corner template move upward, the second middle template and the third corner template can be synchronously moved up for demoulding, and the demoulding is synchronously lifted and separated, and the demoulding efficiency is higher;

[0015] The present invention adopts a distributed support assembly so that when the sleeve sliding concave block moves horizontally, the sleeve guide plate supports the guide slide rod, and the limit ring supports the reinforcement ring vertically. The sleeve support block supports the inclined support block, and the inclined support block can support the sleeve sliding concave block horizontally, ensuring that the sleeve sliding concave block slides horizontally and stably, and demoulding and molding are more stable, avoiding wasting demoulding and molding time.

[0016] In summary, through the mutual influence of the above-mentioned multiple effects, firstly, the four extrusion support plates no longer support the inner walls of the right-angle inner template, the first corner template, the first middle template, the second corner template, the second middle template, and the third corner template, and then the first middle template and the second corner template are moved upward, and the second middle template and the third corner template can be moved up and demoulded synchronously, and finally the inclined support block can provide horizontal support for the sleeve sliding recessed block, ensuring that the sleeve sliding recessed block can slide horizontally and stably. In summary, the mold can be installed or demoulded quickly and synchronously, so the demoulding efficiency in the later stage is higher, thereby improving the overall construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The present invention is a schematic diagram of the structure of a flue formwork device for an exterior wall concrete structure viewed from above.

[0018] Figure 2 The present invention is a schematic diagram of the disassembled structure of a flue formwork device for an exterior wall concrete structure.

[0019] Figure 3 The present invention is a schematic diagram of a partial structure of a guide support cutoff in a flue formwork device for an exterior wall concrete structure.

[0020] Figure 4 The present invention is a schematic diagram of a partial structure of a guide support of a flue formwork device for an exterior wall concrete structure cut off when viewed from above.

[0021] Figure 5 The present invention is a front view structural schematic diagram of an exterior wall concrete structure flue formwork device.

[0022] Figure 6 The present invention is a schematic diagram of a partial structure of a truncated outer frame template in an outer wall concrete structure flue template device.

[0023] Figure 7 The present invention is a schematic diagram of the local structure of the connection between the first corner formwork and the large lifting ear in an exterior wall concrete structure flue formwork device.

[0024] Figure 8 For the present invention Figure 4 Enlarged structural diagram at A in the middle.

[0025] The accompanying drawings are marked as follows: 1, guide pillar; 2, sleeve ring block; 3, hydraulic cylinder; 4, pressing support block; 5, support shaft rod; 6, hinged sleeve ring rod; 7, sleeve sliding concave block; 8, inclined support plate; 9, extrusion support plate; 10, guide slide rod; 11, sleeve guide plate; 12, linkage push rod; 13, support plate; 14, lifting hook; 15, linkage bracket; 16, reinforcement inner ring; 17, S-shaped support block; 18, reinforcement outer ring; 19, first concave Adding block; 20, second concave adding block; 21, third concave adding block; 22, cross bracket; 23, outer frame template; 24, right-angle inner template; 25, first corner template; 26, first middle template; 27, second corner template; 28, second middle template; 29, third corner template; 30, large lifting ear; 31, small lifting ear; 32, inclined support block; 33, sleeve support block; 34, support column; 35, reinforcement ring; 36, limit ring. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] As attached Figure 1-8 The external wall concrete structure flue formwork device shown in the figure is provided with a synchronous linkage mechanism, a positioning linkage component, and a distributed support component. The settings of each mechanism and component can quickly and synchronously load or demould, so the later demoulding efficiency is higher, and the overall construction efficiency is improved. The specific structural settings of each mechanism and component are as follows:

[0028] In some embodiments, as shown in the attached Figure 1-8 As shown, the synchronous linkage mechanism includes a plurality of downward pressure support blocks 4 arranged at the top of the sleeve ring block 2 and distributed in a circular ring at equal intervals. A hydraulic cylinder 3 is provided at the top of each downward pressure support block 4, and a positioning linkage assembly is provided on one side of the hydraulic cylinder 3. The outer wall of the sleeve ring block 2 is embedded with a plurality of supporting shaft rods 5 at equal intervals in the form of a circular ring. The outer wall of the supporting shaft rod 5 is rotatably connected with a hinged sleeve rod 6, and the outer wall of the hinged sleeve rod 6 and the sleeve sliding recessed block 7 is rotatably connected near its bottom position. Inclined support plates 8 are welded on both sides of the sleeve sliding recessed block 7, and an extrusion support plate 9 is welded at one end of the inclined support plate 8. The interior of the sleeve sliding recessed block 7 is horizontally slidably connected with a guide slide rod 10, and a distributed support assembly is provided below the sleeve sliding recessed block 7. The inner walls of the plurality of sleeve ring blocks 2 are vertically slidably connected to the outer wall of the guide pillar 1, the pushing end of the hydraulic cylinder 3 and the top of the sleeve ring block 2 are fixedly connected to the downward pressure support block 4, and the plurality of extrusion support plates 9 are arranged in a rectangular equidistant distribution, and the extrusion support plates 9 are made of stainless steel.

[0029] In some embodiments, as shown in the attached Figure 3-4 As shown, the outer wall of the sleeve sliding concave block 7 is horizontally slidably connected with a collar guide plate 11 welded to one end of the guide slide bar 10, and the inner wall of the guide slide bar 10 is welded to the outer wall of the guide pillar 1, so that the sleeve sliding concave block 7 can move horizontally along the outer wall of the collar guide plate 11, and the collar guide plate 11 can support the guide slide bar 10. One side of the sleeve sliding concave block 7 and both sides of the outer wall of the guide slide bar 10 are provided with linkage push rods 12, and the two ends of the linkage push rod 12 are respectively fixedly connected to one side of the extrusion support plate 9 and one side of the sleeve sliding concave block 7, so that The sleeved sliding recessed block 7 drives two linked push rods 12 to squeeze the extrusion support plate 9, so that the two linked push rods 12 can increase the horizontal supporting force of the extrusion support plate 9, and a support plate 13 is welded to the top of the guide pillar 1, and a lifting hook 14 is fixedly connected to the top of the support plate 13, and a through hole with a circular vertical cross-section is penetrated on one side of the lifting hook 14 to facilitate the crane hook to be hooked to the lifting hook 14, and the lifting hook 14 is moved upward, and the lifting hook 14 drives the support plate 13 to move upward, and the support plate 13 drives the guide pillar 1 to move upward, thereby playing a linked lifting role.

[0030] In some embodiments, as shown in the attached Figure 5-7 As shown, the positioning linkage assembly includes a linkage bracket 15 arranged on one side of the hydraulic cylinder 3, and a reinforcement inner ring 16 and a reinforcement outer ring 18 are sequentially arranged at the bottom end of the linkage bracket 15 from the inside to the outside wall, and a plurality of S-shaped support blocks 17 are fixed in a circular ring with equal spacing between the reinforcement inner ring 16 and the reinforcement outer ring 18, and four first concave addition blocks 19 are fixed in a circular ring with equal spacing at the bottom end of the reinforcement outer ring 18, and one side of each first concave addition block 19 is provided with a second concave addition block 20 and a third concave addition block 21 arranged sequentially from left to right, and cross brackets 22 are welded on both sides of the outer wall of the second concave addition block 20, and an outer frame template 23 is vertically inserted into the inner wall of the first concave addition block 19, and the bottom end lengths of the inner walls of the first concave addition block 19, the second concave addition block 20 and the third concave addition block 21 are all smaller than the top end lengths of their inner walls;

[0031] The inner wall of the outer frame template 23 is movably connected with a right-angle inner template 24, one side of the right-angle inner template 24 is movably connected with a first corner template 25, one side of the first corner template 25 is vertically slidably connected with a first middle template 26, and one side of the first middle template 26 is provided with a second corner template 27, one side of the second corner template 27 is provided with a second middle template 28, and one side of the second middle template 28 is vertically slidably connected with a third corner template 29, the first middle template 26 and the second middle template 28 are both vertically slidably connected to the second corner template 27, and large lifting ears 30 are welded to the tops of the right-angle inner template 24, the first corner template 25, the second corner template 27, and the third corner template 29, and two small lifting ears 31 are fixed to the tops of the first middle template 26 and the second middle template 28.

[0032] In some embodiments, as shown in the attached Figure 4-8 As shown, the distribution support assembly includes an inclined support block 32 arranged below the sleeve sliding recessed block 7, and a collar support block 33 is fixed to the bottom end of the outer frame template 23, and a support column 34 is fixed to the inner wall of the collar support block 33, and one end of the support column 34 is provided with a reinforcement ring 35 and a limit ring 36 in sequence from top to bottom, and the inner walls of the reinforcement ring 35 and the limit ring 36 are welded to the outer wall of the guide pillar 1.

[0033] Working principle of the present invention:

[0034] When synchronously locking, multiple hydraulic cylinders 3 are started, and the hydraulic cylinders 3 drive the downward pressure support block 4 to move downward, and the downward pressure support block 4 drives the sleeve ring block 2 to move vertically downward along the outer wall of the guide pillar 1, and the sleeve ring block 2 drives multiple supporting shafts 5 to move downward, and the supporting shaft 5 drives the hinged sleeve ring rod 6 to move downward, and the hinged sleeve ring rod 6 drives the sleeve sliding concave block 7 to move horizontally along the outer wall of the guide slide rod 10, and at the same time, the sleeve sliding concave block 7 moves horizontally along the outer wall of the sleeve guide plate 11, and the sleeve sliding concave block 7 drives two inclined support plates 8 to move, and the inclined support plate 8 drives the extrusion support plate 9 moves, and at the same time, the sleeved sliding concave block 7 drives the two linkage push rods 12 to squeeze the squeezing support plates 9, so that the four squeezing support plates 9 are expanded, and the four squeezing support plates 9 can be squeezed in the inner wall of the rectangular gap surrounded by the right-angle inner template 24, the first corner template 25, the first middle template 26, the second corner template 27, the second middle template 28, and the third corner template 29, thereby increasing the expansion squeezing force of the right-angle inner template 24, the first corner template 25, the first middle template 26, the second corner template 27, the second middle template 28, and the third corner template 29;

[0035] During the distributed support, when the sleeve sliding concave block 7 moves horizontally, the guide slide bar 10 is supported by the collar guide plate 11, and the limit ring 36 vertically supports the reinforcement ring 35, the reinforcement ring 35 supports the multiple support columns 34, the support columns 34 vertically support the collar support block 33, the collar support block 33 supports the inclined support block 32, and the inclined support block 32 can horizontally support the sleeve sliding concave block 7, thereby increasing the vertical stability of the sleeve sliding concave block 7;

[0036] During pouring, concrete is poured onto the inner wall of the outer frame template 23 and the outer walls of the right-angle inner template 24, the first corner template 25, the first middle template 26, the second corner template 27, the second middle template 28, and the third corner template 29, and a flue can be formed after solidification;

[0037] During demoulding, multiple hydraulic cylinders 3 can be started, and the hydraulic cylinders 3 drive the downward pressure support block 4 to move upward, and the downward pressure support block 4 drives the sleeve ring block 2 to move vertically upward along the outer wall of the guide pillar 1, and the sleeve ring block 2 drives multiple support shafts 5 to move upward, and the support shaft 5 drives the hinged sleeve ring rod 6 to move upward, and the hinged sleeve ring rod 6 drives the sleeve sliding concave block 7 to move horizontally along the outer wall of the guide slide rod 10, and the sleeve sliding concave block 7 drives the inclined support plate 8 to move the extrusion support plate 9, and the four extrusion support plates 9 are all contracted to approach the guide pillar 1, so that the four extrusion support plates 9 no longer support the inner walls of the right-angle inner template 24, the first corner template 25, the first middle template 26, the second corner template 27, the second middle template 28, and the third corner template 29;

[0038] During synchronous linkage lifting, the crane hook is connected to the lifting hook 14, and the lifting hook 14 is moved upward. The lifting hook 14 drives the support plate 13 to move upward, and the support plate 13 drives the guide pillar 1 to move upward, so that the hydraulic cylinder 3 drives the linkage bracket 15 to move upward, and the linkage bracket 15 drives the reinforcement inner ring 16 to move multiple S-shaped support blocks 17 upward, and the S-shaped support block 17 drives the reinforcement outer ring 18 to move the first concave addition block 19 upward, and the second concave addition block 20 and the third concave addition block 21 can be driven to move upward through the two cross brackets 22, so that the first concave addition block 19 and the second concave addition block 20 and The third concave additional blocks 21 are separated from the outer wall of the outer frame template 23, and then the hooks of the crane are placed inside the multiple small lifting ears 31 and the multiple large lifting ears 30. The crane drives the multiple small lifting ears 31 and the multiple large lifting ears 30 to move upward, the right-angle inner template 24 and the first corner template 25 move upward, the first middle template 26 and the second corner template 27 move upward, the second middle template 28 and the third corner template 29 can be moved up synchronously, and synchronously positioned, lifted and separated. Finally, the welded lifting ears on the outer frame template 23 are lifted out to complete the demoulding of the external wall mounted flue.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An external wall concrete structure flue formwork device, comprising a guiding pillar (1), and a plurality of socket ring blocks (2) are arranged at equal intervals from top to bottom on the outer wall of the guiding pillar (1). Characterized in that: A synchronous linkage mechanism is provided at the top end of the socket ring block (2); The synchronous linkage mechanism includes a plurality of downward pressing support blocks (4) arranged at equal intervals in a circular shape at the top end of the socket ring block (2). A hydraulic cylinder (3) is provided at the top end of each downward pressing support block (4). A positioning linkage component is provided on one side of the hydraulic cylinder (3). A plurality of support shaft rods (5) are embedded in the outer wall of the socket ring block (2) at equal intervals in a circular shape. An articulated sleeve rod (6) is rotatably connected to the outer wall of the support shaft rod (5). A socket sliding concave block (7) is rotatably connected to the outer wall of the articulated sleeve rod (6) and near its bottom position. Tilted support plates (8) are welded on both sides of the socket sliding concave block (7). An extrusion support plate (9) is welded at one end of the tilted support plate (8). A guiding slide rod (10) is horizontally slidably connected inside the socket sliding concave block (7). A distributed support component is provided below the socket sliding concave block (7); The positioning linkage component includes a linkage bracket (15) provided on one side of the hydraulic cylinder (3). A reinforcing inner ring (16) and a reinforcing outer ring (18) are sequentially provided on the bottom end of the linkage bracket (15) from the inner wall to the outer wall. A plurality of S-shaped support blocks (17) are fixedly arranged at equal intervals in a circular shape between the reinforcing inner ring (16) and the reinforcing outer ring (18). Four first concave-shaped reinforcing blocks (19) are fixedly arranged at equal intervals in a circular shape at the bottom end of the reinforcing outer ring (18). A second concave-shaped reinforcing block (20) and a third concave-shaped reinforcing block (21) are arranged in sequence from left to right on one side of each first concave-shaped reinforcing block (19). Cross brackets (22) are welded on both outer sides of the outer wall of the second concave-shaped reinforcing block (20). An outer frame formwork (23) is vertically inserted into the inner wall of the first concave-shaped reinforcing block (19).

2. The external wall concrete structure flue formwork device according to claim 1, Characterized in that: The inner walls of the plurality of socket ring blocks (2) are vertically slidably connected to the outer wall of the guiding pillar (1). The pushing end of the hydraulic cylinder (3) and the top end of the socket ring block (2) are both fixedly connected to the downward pressing support block (4).

3. The external wall concrete structure flue formwork device according to claim 1, Characterized in that: The plurality of extrusion support plates (9) are arranged at equal intervals in a rectangular shape, and the extrusion support plates (9) are made of stainless steel.

4. The external wall concrete structure flue formwork device according to claim 1, Characterized in that: A socket ring guiding disc (11) welded to one end of the guiding slide rod (10) is horizontally slidably connected to the outer wall of the socket sliding concave block (7). The inner wall of the guiding slide rod (10) is welded to the outer wall of the guiding pillar (1).

5. The external wall concrete structure flue formwork device according to claim 1, Characterized in that: On one side of the socket sliding concave block (7) and at both positions on the outer wall of the guiding sliding rod (10), linkage push rods (12) are provided. The two ends of each linkage push rod (12) are fixedly connected to one side of the extrusion support plate (9) and one side of the socket sliding concave block (7) respectively.

6. The formwork device for the external wall concrete structure flue according to claim 1, characterized in that: A support disk (13) is welded to the top end of the guiding pillar (1). A lifting hook (14) is fixedly connected to the top end of the support disk (13). A through hole with a circular cross-sectional shape is formed through one side of the lifting hook (14).

7. The formwork device for the external wall concrete structure flue according to claim 1, characterized in that: The length of the bottom end of the inner wall of the first concave-shaped adding block (19), the second concave-shaped adding block (20), and the third concave-shaped adding block (21) is less than the length of the top end of their inner walls.

8. The formwork device for the external wall concrete structure flue according to claim 1, characterized in that: A right-angle inner formwork (24) is movably connected to the inner wall of the outer frame formwork (23). A first corner formwork (25) is movably connected to one side of the right-angle inner formwork (24). A first middle formwork (26) is vertically slidably connected to one side of the first corner formwork (25). A second corner formwork (27) is provided on one side of the first middle formwork (26). A second middle formwork (28) is provided on one side of the second corner formwork (27). A third corner formwork (29) is vertically slidably connected to one side of the second middle formwork (28). The first middle formwork (26) and the second middle formwork (28) are both vertically slidably connected to the second corner formwork (27). Large lifting lugs (30) are welded to the top ends of the right-angle inner formwork (24), the first corner formwork (25), the second corner formwork (27), and the third corner formwork (29). Two small lifting lugs (31) are fixed to the top ends of the first middle formwork (26) and the second middle formwork (28).

9. The formwork device for the external wall concrete structure flue according to claim 1, characterized in that: The distributed support assembly includes an inclined support block (32) arranged below the socket sliding concave block (7). A sleeve support block (33) is fixed to the bottom end of the outer frame formwork (23). A support column (34) is fixed to the inner wall of the sleeve support block (33). A reinforcement ring (35) and a limit ring (36) are sequentially arranged from top to bottom at one end of the support column (34). The inner walls of the reinforcement ring (35) and the limit ring (36) are welded to the outer wall of the guiding pillar (1).

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