Smoke channeling prevention flow guide type uniform exhaust flue forming equipment

Abstract

The utility model discloses smoke channeling prevention flow guide type uniform exhaust flue forming equipment which is composed of an inner mold walking support, a pipeline outer mold, a pipeline inner mold and a track base, the inner mold walking support is connected with the track base in a sliding mode, the pipeline inner mold is composed of two main flue inner molds and an auxiliary flue inner mold, and the two main flue inner molds are connected with the track base in a sliding mode. The auxiliary flue inner mold is divided into two sections and is composed of a long auxiliary flue inner mold and a short auxiliary flue inner mold, the short auxiliary flue inner mold is fixed to the right end of the pipeline outer mold, and an air guide partition plate pouring gap is reserved between the long auxiliary flue inner mold and the short auxiliary flue inner mold. Compared with the prior art, in order to enable the Y-shaped vertical partition plate and the square outer pipe structure to be integrally poured and formed, the auxiliary flue inner mold is designed into two sections, an air guide partition plate pouring gap flows out between the two sections of the auxiliary flue inner mold, the walking supports are inserted into the flue outer mold from the two ends respectively, and the pouring mold is formed in a combined mode. In this way, integrated one-time pouring forming of the smoke exhaust pipeline is achieved.

Description

Technical Field

[0001] The utility model relates to the field of mold manufacturing, in particular to a smoke-proof and flow-guiding uniform exhaust flue forming device. Background Art

[0002] In order to solve the problem of odor leakage in the exhaust pipes between upper and lower floors, a prefabricated residential kitchen and bathroom exhaust duct and exhaust duct system was designed. For details, see patent number: CN202421165406.0. Figure 4 The smoke exhaust duct is divided into a left main flue, a right main flue and a secondary flue in the middle triangle by arranging a Y-shaped vertical partition in the smoke exhaust duct. The smoke exhaust duct is provided with an exhaust valve installation port connected to the secondary flue. The vertical partition in the secondary flue is provided with an exhaust port connected to the left main flue or the right main flue. The left main flue and the right main flue exhaust smoke independently without affecting each other, and the secondary flue of each floor can be flexibly designed to discharge to the left main flue or the right main flue according to the opening direction of the exhaust port according to needs. The exhaust port is provided with an air guide partition for guiding air. The secondary flue is divided into independent flues by the air guide partition, which can effectively avoid the influence of smoke between floors.

[0003] When exhausting smoke on a single floor, an exhaust one-way valve is installed at the exhaust valve installation port, and the exhaust pipe of the range hood or exhaust fan is connected, so that the indoor smoke and waste gas can be discharged into the auxiliary flue. The auxiliary flue can discharge the smoke in the auxiliary flue into the corresponding main flue through the exhaust port. The air guide baffle provided at the exhaust port plays an air guide role. The air guide baffle is arranged upward along the exhaust direction of the exhaust port. The smoke enters the auxiliary flue from the exhaust valve, moves upward in the auxiliary flue, is blocked by the air guide baffle, and is guided to the exhaust port to discharge, and then enters the left main flue or the right main flue, and moves upward along the main flue until it is discharged from the wind hood on the top of the exhaust pipe.

[0004] The exhaust system is composed of multiple sets of exhaust pipes, see Figure 5 , multiple groups of smoke exhaust ducts are arranged in sequence along the vertical direction, and each group of smoke exhaust ducts is arranged on the floor slab of each floor. By connecting and arranging multiple groups of smoke exhaust ducts in the vertical direction, a complete assembled kitchen and bathroom exhaust system is formed. The secondary flue is staggered from top to bottom, and its exhaust port is connected with the left main flue and the right main flue in sequence. For example, the odd-numbered floors uniformly use the left main flue, and the even-numbered floors uniformly use the right main flue. Through the staggered exhaust method, the impact of smoke exhaust between adjacent floors is greatly reduced.

[0005] Since the exhaust duct is equipped with a Y-shaped vertical partition, it is impossible to use the traditional square exhaust duct casting mold for one-piece casting. Therefore, it is urgent to design a casting mold specifically for the exhaust duct with a Y-shaped vertical partition. The casting mold needs to solve the following problems:

[0006] 1. The air guide baffle structure needs to be cast in the auxiliary flue inner mold, which is not conducive to one-piece casting;

[0007] 2. The auxiliary flue is provided with an exhaust port connected to the main flue, which is not conducive to one-piece casting;

[0008] 3. Compared with the square straight-cylinder smoke exhaust duct, the Y-shaped vertical partition divides it into multiple chambers, and the mold needs to be expanded before pouring. The expansion mechanism and mold structure need to be redesigned. Utility Model Content

[0009] The purpose of the utility model is to provide a smoke-proof and flow-guiding uniform exhaust flue forming device that solves the above-mentioned problem.

[0010] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a smoke-proof and flow-guiding uniform exhaust flue forming device, the forming device is composed of an inner mold walking bracket, a pipe outer mold, a pipe inner mold and a track base, the inner mold walking bracket is located on the left side of the pipe outer mold, and is slidably connected to the track base through a positioning roller group, the pipe inner mold is composed of two main flue inner molds and one auxiliary flue inner mold, the auxiliary flue inner mold is divided into two sections, consisting of a long auxiliary flue inner mold and a short auxiliary flue inner mold, the long auxiliary flue inner mold and the two main flue inner molds are respectively fixed horizontally on the side end faces of the inner mold walking bracket, the short auxiliary flue inner mold is fixed to the right end of the pipe outer mold, and a casting gap for the air guide partition is left between the long auxiliary flue inner mold and the short auxiliary flue inner mold.

[0011] Preferably, a casting gap is left between the main flue inner mold and the auxiliary flue inner mold, and an exhaust port baffle is inserted between the casting gap between the long auxiliary flue inner mold and the main flue inner mold, and the exhaust port baffle is placed close to the casting gap of the air guide partition.

[0012] Preferably, the pipe outer mold consists of a bottom mold, a front mold, a rear mold, a left end plate and a right end plate. The bottom mold is mounted on a track base. The left end plate and the right end plate have the same end face structure as the Y-shaped exhaust pipe. The left end plate is mounted on the main flue inner mold and the left end of the long secondary flue, and is fixedly connected to the main flue inner mold and the long secondary flue inner mold. The short secondary flue inner mold is welded and fixed to the secondary flue inner mold position of the right end plate, and the right end plate is detachably connected to the main flue inner mold.

[0013] Preferably, the front template and the rear template are respectively located at the front and rear sides of the bottom template and are rotatably connected to the bottom template. A connecting rod for connecting and positioning is provided between the front template and the rear template.

[0014] Preferably, a hydraulic motor, a transmission gear and a rack shaft are provided on the track base. The rack shaft is mounted on the bottom track bracket, and one end is fixedly connected to the inner mold walking bracket, and the other end is connected to the hydraulic motor through a transmission gear. A small hydraulic station that provides power for the hydraulic motor is installed on the inner mold walking bracket.

[0015] Preferably, it also includes an expansion mechanism A and an expansion mechanism B, wherein the expansion mechanism A is located in the inner molds of the two main flues, and the expansion mechanism B is located in the inner mold of the long secondary flue. The inner mold walking bracket is provided with a push plate and a hydraulic cylinder for driving the expansion mechanism A and the expansion mechanism B to move synchronously. The hydraulic cylinder is installed on the inner mold walking bracket, and its hydraulic rod passes through the inner mold walking bracket and is fixedly connected to the push plate.

[0016] Preferably, the main flue inner mold is composed of a main flue upper mold and a main flue lower mold. The main flue lower mold is U-shaped, the main flue upper mold is buckled on the upper end port of the main flue lower mold, and has flanges on both sides. An expansion gap A is left between the flange and the outer side wall of the main flue lower mold.

[0017] Preferably, the expansion mechanism A consists of a push rod A, a group of guide grooves, a group of guide wheels and a triangular expansion block. The guide grooves are horizontally welded on the inner side walls on both sides of the main flue lower mold. The guide wheels are arranged on the left and right sides of the push rod A and are located in the guide grooves. One end of the push rod A is fixed on the push plate, and the other end moves along the length direction of the main flue inner mold through the guide wheel and the guide groove. The triangular expansion block is located behind the guide wheel and is respectively arranged in the notch of the guide groove. The width of the triangular expansion block gradually increases along the forward direction of the push rod A.

[0018] Preferably, the long auxiliary flue inner mold is an inverted triangle with an opening at the lower end to form an expansion gap B. The short auxiliary flue inner mold has the same cross-sectional shape as the long auxiliary flue inner mold and a closed structure at the lower end.

[0019] Preferably, the expansion mechanism B is composed of a push rod B, a swing arm, a positioning shaft and a strip expansion block. The strip expansion block is located below the push rod B and has the same shape as the expansion gap B of the auxiliary flue. The two ends of the swing arm are rotatably connected to the push rod B and the strip expansion block respectively. The positioning shaft is mounted between the left and right side walls of the auxiliary flue inner mold, and the middle part of the swing arm is rotatably connected to the positioning shaft.

[0020] Compared with the prior art, the advantages of the present invention are:

[0021] (1) In order to enable the Y-shaped vertical partition and the square outer tube structure to be integrally cast, the utility model designs the auxiliary flue inner mold into two sections, and leaves a casting gap for the air guide partition between the two sections of the auxiliary flue inner mold. The inner mold walking bracket and the right walking bracket are respectively inserted into the flue outer mold from both ends to form a casting mold, thereby realizing the one-stop casting of the exhaust pipe.

[0022] (2) In order to solve the problem of exhaust port casting, the utility model designs a plastic exhaust port baffle according to the size of the exhaust port. It only needs to be inserted into the exhaust port position corresponding to the casting gap to prevent the exhaust port position from being cast by concrete. After the casting is completed, the plastic exhaust port baffle can be knocked down and removed. It is very convenient and does not affect the integrated casting and molding of the smoke exhaust duct.

[0023] (3) In addition, the present invention also designs the structure of the main flue inner mold and the auxiliary flue inner mold, and designs an expansion mechanism inside them to facilitate mold expansion and demoulding operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0025] Figure 2 Schematic diagram of the cross section of the inner mold AA of the pipeline of the present invention;

[0026] Figure 3 This is a schematic structural diagram of the end plate of the utility model;

[0027] Figure 4 This is a schematic diagram of the product structure of the utility model;

[0028] Figure 5 This is a schematic diagram of the assembly of the product produced by this utility model on the smoke exhaust pipe system.

[0029] Figure: 1. Inner mold traveling support; 11. Small hydraulic station; 12. Hydraulic cylinder; 13. Push plate; 2. Pipe outer mold; 21. Front mold; 22. Rear mold; 23. Left end plate; 24. Right end plate; 25. Stop plate; 26. Hooking rod; 27. Handle; 3. Pipe inner mold; 31. Main flue inner mold; 311. Main flue upper mold; 312. Main flue lower mold; 313. Expansion gap A; 32. Auxiliary flue inner mold; 321. Long auxiliary flue inner mold. 322. Inner mold of short auxiliary flue; 323. Expansion gap B; 4. Casting gap of air guide baffle; 5. Track base; 51. Hydraulic motor; 52. Transmission gear; 53. Rack shaft; 6. Casting gap; 7. Exhaust port baffle; 8. Expansion mechanism A; 81. Push rod A; 82. Guide groove; 83. Triangular expansion block; 84. Guide wheel; 9. Expansion mechanism B; 91. Push rod B; 92. Swing arm; 93. Positioning shaft; 94. Strip expansion block; 10. Exhaust duct; 101. Main flue; 102. Auxiliary flue; 103. Air guide baffle; 104. Exhaust port. DETAILED DESCRIPTION

[0030] The utility model is a special molding device for integrally casting a smoke exhaust duct with a Y-shaped vertical partition. The utility model will be further described below:

[0031] Example: A smoke-proof and uniform exhaust flue forming device, see Figures 1 to 3 The forming equipment is composed of an inner mold walking bracket 1, a pipe outer mold 2, a pipe inner mold 3 and a track base 5. The inner mold walking bracket 1 is located on the left side of the pipe outer mold 2 and is slidably connected to the track base 5 through a positioning roller group. The pipe inner mold 3 is composed of two main flue inner molds 31 and one auxiliary flue inner mold 32. The auxiliary flue inner mold 32 is divided into two sections, consisting of a long auxiliary flue inner mold 321 and a short auxiliary flue inner mold 322. The long auxiliary flue inner mold 321 and the two main flue inner molds 31 are horizontally fixed on the side end surfaces of the inner mold walking bracket 1 respectively. The short auxiliary flue inner mold 322 is fixed to the right end of the pipe outer mold 2. A wind guide partition casting gap 4 is left between the long auxiliary flue inner mold 321 and the short auxiliary flue inner mold 322.

[0032] In order to enable the Y-shaped vertical partition and the square outer tube structure to be integrally cast and formed to form the main flue 101 and auxiliary flue 102 structures of the smoke exhaust duct 10, the utility model designs two main flue inner molds 31 and one auxiliary flue inner mold 32, and the auxiliary flue inner mold 32 is designed to be divided into two sections. The long auxiliary flue inner mold 321, together with the two main flue inner molds 31, is inserted into the pipe outer mold 2 through the inner mold walking bracket 1, and the short auxiliary flue inner mold 322 is directly welded to the right end plate 24 of the pipe outer mold 2. When the right end is installed, it is simultaneously inserted into the pipe outer mold 2, and a casting gap 4 for the air guide partition flows out between the two sections of the auxiliary flue inner molds 32, which is used to form the air guide partition 103 after casting, thereby realizing the integral casting molding of the smoke exhaust duct.

[0033] Regarding the opening of the exhaust port 104 on the secondary flue 102, if the exhaust port 104 is opened manually after pouring, it is difficult to open it manually due to the small operating space in the exhaust duct and the deep position of the exhaust port 104. Therefore, the utility model designs a plastic exhaust port baffle 7 according to the size of the exhaust port 104. Since there is a pouring gap 6 between the main flue inner mold 31 and the secondary flue inner mold 32, it is only necessary to insert an exhaust port baffle plate 7 into the pouring gap 6 at the exhaust port position of the secondary flue 102, that is, the position between the long secondary flue inner mold 321 and the main flue inner mold 31 close to the pouring gap 6 of the air guide baffle. The exhaust port baffle plate 7 can block the concrete from sealing the exhaust port 104. After the pouring is completed, the plastic exhaust port baffle plate 7 can be knocked down and taken out, which is very convenient and does not affect the one-piece pouring and molding of the exhaust duct 10.

[0034] Its pipe outer mold 2 is mainly used to form a square outer pipe wall structure. Regarding the design of the pipe outer mold 2, the pipe outer mold 2 consists of a bottom mold, a front template 21, a rear template 22, a left end plate 23 and a right end plate 24. The bottom mold is mounted on a track base 5. The front template 21 and the rear template 22 are respectively located on the front and rear sides of the bottom mold, and are connected to the bottom mold at a 90° flip rotation. A connecting rod 26 for connecting and positioning is provided between the front template 21 and the rear template 22. The front template 21 and the rear template 22 are limited and fixed by the connecting rod 26. The left end plate 23 and the right end plate 24 are used to seal the left and right ends. The left end plate 23 and the right end plate 24 have the same structure as the end face of the Y-shaped exhaust pipe.

[0035] As a preferred solution, a row of rollers can be set up on the track base 5, and the bottom mold can be placed directly on the rollers. A handle 27 is designed on the right side of the bottom mold. When the demoulding work is completed, the product has been formed but has not yet completely dried. In order to speed up the pouring of the next product, the bottom mold can be pulled out together with the poured product, placed on a cart, and pushed to the side to dry.

[0036] The left end plate 23 is mounted on the main flue inner mold 31 and the left end of the long secondary flue, and is fixedly connected to the main flue inner mold 31 and the long secondary flue inner mold 321. The main flue inner mold 31 and the secondary flue inner mold 32 can be limited and fixed into one through the left end plate 23, and the left end of the outer mold is sealed. The short secondary flue inner mold 322 is welded and fixed to the position of the secondary flue inner mold 32 of the right end plate 24. The right end plate 24 is detachably connected to the main flue inner mold 31. Since the short secondary flue is shorter and relatively lighter, the right end plate 24 can be used as a bearing part, and the assembly of the pipeline inner mold 3 is completed with the installation of the right end plate 24.

[0037] The installation steps of the inner mold and the outer mold during pouring are as follows: first start the inner mold walking bracket 1, and push the pipe inner mold 3 into the pipe outer mold 2, that is, above the bottom mold. When the inner mold walking bracket 1 moves to the specified position, it means that the main flue inner mold 31 has been moved into place, and the left end plate 23 completes the outer mold sealing on the left side. Then the right end plate 24 is clamped on the right end of the main flue inner mold 31 to realize the installation and erection of the main flue inner mold 31 and complete the sealing on the right side. Then the front side template 21 and the rear side template 22 are erected, and they are limited and fixed by the hanging rod 26 so that they stand upright on both sides of the pipe inner mold 3 to form a square outer mold structure, thereby completing the assembly of the entire set of molds. Finally, pour concrete from the top of the mold for pouring.

[0038] In order to prevent the right end plate 24 from retreating to the right during pouring, as a preferred solution, a limit baffle 25 is provided on the right side of the front side formwork 21 and the rear side formwork 22 to prevent the right end plate 24 from moving to the right.

[0039] Since the main flue inner mold 31 is heavy, in order to reduce the intensity of manual labor, the utility model adopts a hydraulic drive device to drive the inner mold walking bracket 1. The track base 5 is provided with a hydraulic motor 51, a transmission gear 52 and a rack shaft 53. The rack shaft 53 is mounted on the bottom track bracket, and one end is fixedly connected to the inner mold walking bracket 1, and the other end is connected to the hydraulic motor 51 through the transmission gear 52. A small hydraulic station 11 for providing power to the hydraulic motor 51 is installed on the inner mold walking bracket 1. The small hydraulic station 11 can provide power to the hydraulic motor 51 and the hydraulic cylinder 12.

[0040] It also includes an expansion mechanism A8 and an expansion mechanism B9. The expansion mechanism A8 is located in the two main flue inner molds 31 and is used for expanding and demolding the main flue inner mold 31. The expansion mechanism B9 is located in the long auxiliary flue inner mold 321 and is used for expanding and demolding the long auxiliary flue inner mold 321. The short auxiliary flue inner mold 322 is relatively short and easier to demold without expansion. As a preferred solution, the short auxiliary flue inner mold 322 can be designed into a variable diameter structure with a thin left and a thick right, which is more conducive to demolding the short auxiliary flue.

[0041] The inner mold traveling support 1 is provided with a push plate 13 and a hydraulic cylinder 12 that drive the synchronous movement of the expansion mechanism A8 and the expansion mechanism B9. The hydraulic cylinder 12 is mounted on the inner mold traveling support 1, and its hydraulic rod passes through the inner mold traveling support 1 and is fixedly connected to the push plate 13. The hydraulic cylinder 12 pushes the push plate 13 to perform reciprocating motion, thereby achieving synchronous movement of the expansion mechanism A8 and the expansion mechanism B9 on the inner mold traveling support 1, thereby achieving mold expansion and demolding operations. Numerous mechanisms are currently available for driving the expansion mechanism A8 and the expansion mechanism B9. This embodiment uses hydraulic drive as an example, and other drive mechanisms such as motors can be replaced according to actual conditions.

[0042] In order to facilitate the expansion and demolding of the main flue inner mold 31, the main flue inner mold 31 is designed. The main flue inner mold 31 consists of a main flue upper mold 311 and a main flue lower mold 312. The main flue lower mold 312 is U-shaped. The main flue upper mold 311 is buckled on the upper end port of the main flue lower mold 312, and has flanges on both sides. An expansion gap A313 is left between the flange and the outer side wall of the main flue lower mold 312. The U-shaped main flue lower mold 312 is provided with an elastic variable at its upper end. When the two sides of the main flue lower mold 312 expand to both sides, its outer side surface is just close to the inner side surface of the flange to achieve the sealing of the expansion gap A313. During pouring, concrete will not enter the main flue inner mold 31. When pouring is completed and the concrete is solidified, the two sides of the main flue lower mold 312 are loosened, and the port retracts to achieve its demolding operation.

[0043] In order to realize the expansion and demoulding of the main flue inner mold 31, an expansion mechanism A8 is designed. The expansion mechanism A8 consists of a push rod A81, a set of guide grooves 92, a set of guide wheels 84 and a triangular expansion block 83. The guide grooves 92 are horizontally welded on the inner side walls of the main flue lower mold 312. The guide wheels 84 are arranged on the left and right sides of the push rod A81 and are located in the guide grooves 92. One end of the push rod A81 is fixed on the push plate 13, and the other end is connected to the push plate 13 through the guide wheels 84. The guide groove 92 moves along the length direction of the main flue inner mold 31. The triangular expansion block 83 is located behind the guide wheel 84 and is respectively arranged in the notch of the guide groove 9282. The width of the triangular expansion block 83 gradually increases along the forward direction of the push rod A81. When the push rod extends forward, due to the limitation of the triangular expansion block 83, the two side walls of the main flue lower mold 312 expand outward to realize mold expansion. When the push rod moves back, the tension disappears, and the main flue inner mold 31 can be demoulded.

[0044] To facilitate expansion and demolding of the auxiliary flue inner mold 32, the long auxiliary flue inner mold 321 is designed to have an inverted triangular shape, with an opening at its lower end forming an expansion gap B323. The expansion mechanism B9 consists of a push rod B91, a swing arm 92, a positioning shaft 93, and a strip expansion block 94. One end of the push rod B91 is fixedly connected to the push plate 13. The strip expansion block 94 is located below the push rod B91 and has the same shape as the auxiliary flue expansion gap B323. The two ends of the swing arm 92 are rotatably connected to the push rod B91 and the strip expansion block 94, respectively. The positioning shaft 93 is mounted between the left and right sidewalls of the long auxiliary flue inner mold 321, and the middle portion of the swing arm 92 is rotatably connected to the positioning shaft 93. During mold expansion, the push rod retracts, and the swing arm 92 rotates about the positioning shaft 93. When it rotates to the vertical position, the strip expansion block 94 reaches its lowest point, just expanding the lower opening of the long auxiliary flue inner mold 321 and sealing the expansion gap B323, preventing concrete from entering the auxiliary flue inner mold 32 during pouring. After pouring is completed and the concrete solidifies, the push rod B91 is driven forward, and the swing arm 92 pulls up the strip expansion block 94, retracting the lower opening of the auxiliary flue inner mold 32, allowing demolding. Because the short auxiliary flue inner mold 322 is shorter and easier to demold, there is no need for an expansion mechanism. Therefore, the short auxiliary flue inner mold 322 has the same cross-sectional shape as the long auxiliary flue inner mold 321, but its lower end is closed.

[0045] The above is a detailed introduction to the anti-smoke diversion type uniform exhaust flue forming equipment provided by the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention; at the same time, for general technical personnel in this field, based on the idea of ​​the present invention, there will be changes in the specific implementation method and application scope, and changes and improvements to the present invention will be possible without exceeding the concept and scope specified in the appended claims. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A smoke-proof and flow-guiding uniform exhaust flue forming device, characterized by: The forming equipment consists of an inner mold walking bracket, a pipe outer mold, a pipe inner mold and a track base. The inner mold walking bracket is located on the left side of the pipe outer mold and is slidably connected to the track base through a positioning roller group. The pipe inner mold consists of two main flue inner molds and one auxiliary flue inner mold. The auxiliary flue inner mold is divided into two sections, consisting of a long auxiliary flue inner mold and a short auxiliary flue inner mold. The long auxiliary flue inner mold and the two main flue inner molds are horizontally fixed on the side end faces of the inner mold walking bracket, and the short auxiliary flue inner mold is fixed to the right end of the pipe outer mold. A gap for casting an air guide partition is left between the long auxiliary flue inner mold and the short auxiliary flue inner mold.

2. The smoke-proof and smoke-guiding uniform exhaust flue forming device according to claim 1, characterized in that: A casting gap is left between the main flue inner mold and the auxiliary flue inner mold, and an exhaust port baffle is inserted between the casting gap between the long auxiliary flue inner mold and the main flue inner mold. The exhaust port baffle is placed near the casting gap of the air guide partition.

3. The smoke-channeling-proof and uniform exhaust flue forming device according to claim 1 is characterized in that: The pipe outer mold consists of a bottom mold, a front mold, a rear mold, a left end plate and a right end plate. The bottom mold is mounted on a track base. The left end plate and the right end plate have the same end face structure as the Y-shaped exhaust pipe. The left end plate is mounted on the main flue inner mold and the left end of the long secondary flue, and is fixedly connected to the main flue inner mold and the long secondary flue inner mold. The short secondary flue inner mold is welded and fixed to the secondary flue inner mold position of the right end plate. The right end plate is detachably connected to the main flue inner mold.

4. The smoke-channeling-proof and uniform exhaust flue forming device according to claim 3 is characterized by: The front template and the rear template are respectively located at the front and rear sides of the bottom template and are rotatably connected to the bottom template. A connecting rod for connecting and positioning is provided between the front template and the rear template.

5. The smoke-channeling-proof and uniform exhaust flue forming device according to claim 1 is characterized in that: A hydraulic motor, a transmission gear and a rack shaft are provided on the track base. The rack shaft is mounted on the bottom track bracket, and one end is fixedly connected to the inner mold walking bracket, and the other end is connected to the hydraulic motor through a transmission gear. A small hydraulic station that provides power for the hydraulic motor is installed on the inner mold walking bracket.

6. The smoke-channeling-proof and uniform exhaust flue forming device according to claim 1 is characterized in that: It also includes an expansion mechanism A and an expansion mechanism B, wherein the expansion mechanism A is located in the inner molds of the two main flues, and the expansion mechanism B is located in the inner mold of the long secondary flue. The inner mold walking bracket is provided with a push plate and a hydraulic cylinder for driving the expansion mechanism A and the expansion mechanism B to move synchronously. The hydraulic cylinder is installed on the inner mold walking bracket, and its hydraulic rod passes through the inner mold walking bracket and is fixedly connected to the push plate.

7. The smoke-channeling-proof and uniform exhaust flue forming device according to claim 6, characterized in that: The main flue inner mold is composed of a main flue upper mold and a main flue lower mold. The main flue lower mold is U-shaped. The main flue upper mold is buckled on the upper end port of the main flue lower mold, and has flanges on both sides. An expansion gap A is left between the flange and the outer side wall of the main flue lower mold.

8. The smoke-channeling-proof and uniform exhaust flue forming device according to claim 6 is characterized in that: The expansion mechanism A consists of a push rod A, a group of guide grooves, a group of guide wheels and triangular expansion blocks. The guide grooves are horizontally welded on the inner side walls on both sides of the main flue lower mold. The guide wheels are arranged on the left and right sides of the push rod A and are located in the guide grooves. One end of the push rod A is fixed on the push plate, and the other end moves along the length direction of the main flue inner mold through the guide wheels and the guide grooves. The triangular expansion blocks are located behind the guide wheels and are respectively arranged in the notches of the guide grooves. The width of the triangular expansion blocks gradually increases along the forward direction of the push rod A.

9. The smoke-channeling-proof and uniform exhaust flue forming device according to claim 6, characterized in that: The long auxiliary flue inner mold is in the shape of an inverted triangle, with its lower end open to form an expansion gap B. The short auxiliary flue inner mold has the same cross-sectional shape as the long auxiliary flue inner mold, and its lower end is a closed structure.

10. The smoke-channeling-proof and uniform exhaust flue forming device according to claim 9, characterized in that: The expansion mechanism B consists of a push rod B, a swing arm, a positioning shaft and a strip expansion block. The strip expansion block is located below the push rod B and has the same shape as the expansion gap B of the auxiliary flue. The two ends of the swing arm are rotatably connected to the push rod B and the strip expansion block respectively. The positioning shaft is mounted between the left and right side walls of the auxiliary flue inner mold, and the middle part of the swing arm is rotatably connected to the positioning shaft.

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