Fabricated plastering-free composite exhaust system

Abstract

The utility model discloses an assembly type plastering-free composite exhaust system which comprises a square exhaust pipeline, the exhaust pipeline is of an inner-outer double-layer composite structure, the inner layer of the exhaust pipeline is a metal exhaust inner pipe, the outer layer of the exhaust pipeline is a composite cement mortar outer pipe, a metal partition plate is vertically arranged in the exhaust inner pipe, and the outer layer of the exhaust pipeline is a composite cement mortar outer pipe. The metal partition plates divide the exhaust inner pipe into a plurality of vertical independent exhaust pipelines, and exhaust valve mounting ports are formed in the upper portions of the exhaust pipelines. Compared with the prior art, the exhaust inner pipe adopts the stainless steel pipeline and has the advantages of oil stain resistance and long service life, the cement mortar outer pipe is poured on the outer layer of the exhaust pipeline, so that the exhaust pipeline has the functions of high temperature resistance and fire prevention, residents can directly lay tiles according to own decoration styles without distributing a net and plastering, and the exhaust pipeline is very convenient to use. The overall structural strength of the exhaust pipeline can be greatly improved through the metal partition plates, mutual influence between floors during flue gas emission is reduced, and fire disasters are prevented from spreading through the exhaust pipeline.

Description

Technical Field

[0001] The utility model relates to the field of exhaust pipes, in particular to an assembled plaster-free composite exhaust system. Background Art

[0002] The kitchen and bathroom exhaust ducts of prefabricated houses are usually arranged in the corners of kitchens or bathrooms in multi-story buildings. They are used for the centralized discharge of kitchen smoke and bathroom waste gas. The kitchen fumes and waste gas are collected through the exhaust duct and then discharged from the roof hood. Most of the existing kitchen and bathroom exhaust ducts use hollow prefabricated cement pipes and artificially pasted cement exhaust ducts, which are particularly prone to cracking. Their lateral impact resistance is weak. The strength can only be improved by increasing the wire diameter of the steel mesh to achieve impact resistance. If the fire check valve installed on the pipeline is stuck by oil and dirt, it will cause the valve plate to be not closed tightly. If a fire occurs downstairs, the flames will extend along the pipeline and cause the upper kitchen to burn and catch fire. In particular, the smoke and odor are serious, causing indoor air pollution, which directly endangers personal safety and health. Some hand-pasted exhaust ducts have uneven wall thickness, rough inner walls, and air blocking curtains to form vortices during ventilation. The uniformity of smoke emission cannot be guaranteed. When the exhaust pressure is high, it is easy to cause the kitchen range hood to be blocked. Over time, it is easy to damage electrical appliances and cause economic losses. When the above two exhaust ducts were installed on the construction site, the installation technology was too rough, and after the installation was completed, the nets had to be plastered. In particular, the traditional method of sealing the joints between the two floors would cause smoke leakage and odor due to poor air tightness, and the defects were more prominent. The tiles pasted on during the secondary decoration were prone to corner jumping or falling off.

[0003] Some high-end residences directly use stainless steel pipes as exhaust pipes, which have the advantages of easy installation, easy cleaning, and oil resistance. However, stainless steel pipes also have the disadvantages of fast heat transfer and no heat insulation. Due to different preferences and home decoration styles of each household, residents build bricks around the exhaust pipes to wrap them, then apply cement mortar and paste tiles to achieve the kitchen decoration effect. The exhaust pipes made of bricks occupy kitchen space, reduce the kitchen use area, and are time-consuming and laborious for workers to work.

[0004] Furthermore, most of the existing exhaust pipes have only one main exhaust pipe, and since the upper and lower floors are separated only by exhaust valves, the exhaust valves alone cannot completely block the smell. Moreover, if a fire occurs in the kitchen downstairs, the flames may climb along the exhaust pipe to the exhaust pipe upstairs, and spread from the exhaust valve installation port to the kitchen upstairs, causing safety risks. Therefore, it is urgent to design the existing kitchen and bathroom exhaust pipes. Utility Model Content

[0005] The purpose of the utility model is to provide an assembled plaster-free composite exhaust system which solves the above-mentioned problem.

[0006] To achieve the above object, the technical solution adopted by the utility model is: a prefabricated plaster-free composite exhaust system, including a square exhaust pipe. The exhaust pipe is a double-layer composite structure inside and outside. The inner layer of the exhaust pipe is a metal exhaust inner pipe, and the outer layer is a composite cement mortar outer pipe. A metal partition is vertically arranged in the exhaust inner pipe. The metal partition divides the exhaust inner pipe into multiple vertical independent exhaust pipes. An exhaust valve installation port is opened at the upper part of the exhaust pipe.

[0007] Preferably, the metal partition is Y-shaped. The metal partition divides the smoke exhaust pipe into a left main exhaust pipe, a right main exhaust pipe, and a middle triangular auxiliary exhaust pipe. The exhaust valve installation port is communicated with the auxiliary exhaust pipe. A partition board is arranged in the auxiliary exhaust pipe. The partition board divides the auxiliary exhaust pipe into independent exhaust chambers in units of floors. An exhaust port is arranged at the top of the exhaust chamber. The exhaust port is opened on the metal partition. The exhaust chamber is communicated with the left main exhaust pipe or the right main exhaust pipe through the exhaust port.

[0008] Preferably, the metal partition is arranged at the exhaust port and is inclined upward along the exhaust direction of the exhaust port.

[0009] Preferably, the cross-section of the metal partition is groove-shaped. The metal partition divides the smoke exhaust pipe into a main exhaust pipe and an auxiliary exhaust pipe. The auxiliary exhaust pipe is located at the upper part of the smoke exhaust pipe and is communicated with the exhaust valve installation port at the lower end. The top end of the auxiliary exhaust pipe is open, and a partition board is arranged at the bottom end of the auxiliary exhaust pipe.

[0010] Preferably, the partition board is inclined upward.

[0011] Preferably, flanges are arranged on the side edges of the metal partition, and the flanges are closely attached to the inner side wall of the exhaust inner pipe.

[0012] Preferably, a horizontal hanging plate is bent on the upper end surface of the metal partition. The metal partition is lapped on the upper end of the exhaust inner pipe and spot-welded to the fixed exhaust inner pipe. A limiting block for limiting the metal partition is arranged on the inner side wall of the exhaust inner pipe.

[0013] Preferably, the exhaust inner pipe is made of stainless steel pipe, with a matte outer wall and a smooth inner wall.

[0014] Preferably, hanging nails are welded on the outer side wall of the exhaust inner pipe.

[0015] Preferably, the metal partition is made of stainless steel sheet by pressing.

[0016] A prefabricated plaster-free exhaust system. There are multiple groups of the exhaust pipes. The multiple groups of exhaust pipes are arranged in sequence along the vertical direction to form an exhaust system. A wind cap is arranged at the top of the exhaust system.

[0017] Compared with the prior art, the advantages of the present utility model are as follows:

[0018] (1) The exhaust inner pipe of the present utility model adopts a stainless steel pipe, which has the advantages of being resistant to oil stains and having a long service life. The outer wall of the stainless steel pipe is a matte surface, which is convenient for the outer pipe of the outer layer of cement mortar to be tightly bonded to the inner pipe when casting with a mold. The inner wall of the stainless steel pipe is a smooth surface, which is not easy to condense oil stains and is also convenient for cleaning the exhaust pipe in the later stage.

[0019] (2) Since the outer layer of the exhaust pipe is cast with a cement mortar outer pipe, during on-site decoration, the household only needs to lay tiles according to their own decoration style, without the need to brick or plaster the exhaust pipe, which is very convenient, time-saving and labor-saving, and reduces the construction cost.

[0020] (3) Through the design of the metal partition, the overall structural strength of the exhaust pipe can be greatly increased, and the exhaust inner pipe can be divided into multiple vertical independent exhaust pipes. The independent exhaust pipes can be used for the separate discharge of flue gas of users on different floors, reducing the mutual influence of flue gas discharge between floors.

[0021] (4) Through the partition board, the auxiliary exhaust pipes on each floor can be separately separated to exhaust the main exhaust pipe, avoiding the smell of flue gas from spreading between adjacent upper and lower floors. When a fire occurs downstairs, the flame will only enter the main exhaust pipe upward and will not pour downward into the exhaust chamber upstairs, preventing the fire from spreading through the exhaust pipe.

[0022] (5) The metal partition is Y-shaped, and the exhaust direction of the exhaust pipe is arranged alternately left and right. Specifically, the left main exhaust pipe is used on odd-numbered floors, and the right main exhaust pipe is used on even-numbered floors. Through the staggered exhaust method, the influence of flue gas exhaust between adjacent floors is greatly reduced. Brief Description of the Drawings

[0023] Figure 1 is the overall structural schematic diagram of the present utility model;

[0024] Figure 2 is the enlarged end face structural schematic diagram of the present utility model;

[0025] Figure 3 is the sectional structural schematic diagram of the present utility model;

[0026] Figure 4 is the internal structural schematic diagram of the present utility model;

[0027] Figure 5 is the structural schematic diagram of the Y-shaped metal partition inside the exhaust pipe of the present utility model;

[0028] Figure 6Schematic structural diagram of a smoke exhaust duct system formed by connecting multiple exhaust ducts of the present utility model;

[0029] Figure 7 Schematic structural diagram of the present utility model with a square groove-shaped metal partition inside the exhaust pipe;

[0030] Figure 8 Schematic structural diagram of the present utility model with an arc-shaped groove-shaped metal partition inside the exhaust pipe;

[0031] Figure 9 Schematic structural diagram of the present utility model with a triangular groove-shaped metal partition inside the exhaust pipe.

[0032] In the figure: 1, outer cement mortar pipe; 2, inner exhaust pipe; 3, metal partition; 31, flanging; 32, hanging plate; 4, left main exhaust pipe; 5, right main exhaust pipe; 6, auxiliary exhaust pipe; 7, exhaust valve installation port; 8, partition board; 9, exhaust port; 10, hanging nail; 11, limit block. Detailed implementation mode

[0033] The present utility model will be further described as follows: An assembled non-plastering composite exhaust system, see Figures 1 to 4 , including a square exhaust duct, the exhaust duct is a double-layer composite structure inside and outside, the inner layer of the exhaust duct is a metal inner exhaust pipe 2, and the outer layer is a composite cement mortar outer pipe 1. The cement mortar outer pipe 1 can adopt a composite fiber mortar pipe compounded with steel fibers or carbon fibers to increase the strength of the cement mortar outer pipe 1. A metal partition 3 is vertically arranged inside the inner exhaust pipe 2. The metal partition 3 is made by pressing stainless steel plates, or can also be made of other fireproof and flame-retardant materials. The metal partition 3 divides the inner exhaust pipe 2 into multiple vertical independent exhaust ducts. A limit block 11 for limiting the metal partition 3 is arranged on the inner side wall of the inner exhaust pipe 2. The limit block 11 plays a role of limiting and fixing during the installation and disassembly of the metal partition 3, avoiding the deviation of the installation position of the metal partition. An exhaust valve installation port 7 is opened at the upper part of the exhaust duct. The inner exhaust pipe 2 of the present utility model adopts a stainless steel pipe, which has the advantage of being resistant to oil stains. The outer wall of the stainless steel pipe is a matte surface. When pouring the outer layer of the cement mortar outer pipe 1 with a mold, the outer pipe and the inner pipe are tightly fitted, making it have the advantages of high temperature resistance, not easy to condense oil stains and long service life. Since the formed cement mortar outer pipe 1 is poured, during on-site decoration, the household only needs to lay tiles according to their own decoration style, which is very convenient and saves time and effort.

[0034] The metal exhaust inner pipe 2 is also conducive to the installation and fixation design of the metal partition 3. Through the metal partition 3, the overall structural strength of the exhaust pipe can be greatly increased, and the lateral compressive resistance can be improved. The metal partition 3 can also divide the exhaust inner pipe 2 into multiple vertical independent exhaust pipes, which can be used for the separate emission of flue gas of users on different floors, reducing the mutual influence during the flue gas emission between floors. The specific structural design is as follows:

[0035] The metal partition 3 is Y-shaped, see Figure 5 , the metal partition 3 divides the smoke exhaust pipe into a left main exhaust pipe 4, a right main exhaust pipe 5 and a middle triangular auxiliary exhaust pipe 6. The exhaust valve installation port 7 is communicated with the auxiliary exhaust pipe 6. A partition plate 8 is arranged in the auxiliary exhaust pipe 6. The partition plate 8 divides the auxiliary exhaust pipe 6 into independent exhaust chambers in units of floors. An exhaust port 9 is arranged at the top of the exhaust chamber. The exhaust port 9 is opened on the metal partition 3. There are multiple groups of exhaust pipes, and multiple groups of exhaust pipes are arranged in sequence in the vertical direction to form an exhaust system, see Figure 6 , a wind cap is arranged at the top of the exhaust system. Through the partition plate 8, the auxiliary exhaust pipe 6 of each floor can be separately separated to exhaust the main exhaust pipe, avoiding the smell of flue gas between adjacent upper and lower floors. When a fire occurs downstairs, the flame will only enter the main exhaust pipe upward and will not pour downward into the exhaust chambers on the upper floors, preventing the spread of the fire through the exhaust pipe. The exhaust chamber is communicated with the left main exhaust pipe 4 or the right main exhaust pipe 5 through the exhaust port 9, and it can be designed which main exhaust pipe the exhaust chamber exhausts to according to the specific situation. Moreover, the Y-shaped metal partition 3 structure can greatly increase the structural strength of the exhaust pipe and make it have a high lateral impact resistance. As a preferred solution, the exhaust directions of the exhaust pipes on the entire floor are arranged alternately left and right. Specifically, the left main exhaust pipe 4 is used on odd-numbered floors, and the right main exhaust pipe 5 is used on even-numbered floors. Through the staggered exhaust method, the influence of flue gas exhaust between adjacent floors is greatly reduced.

[0036] Since the metal partition 3 has the advantages of light weight and small surface smooth resistance, in the actual use process, its steel cost is the key to determining the market acceptance. Therefore, without considering the diversion of multiple main flue ducts, for cost considerations, the present utility model proposes a design scheme of the metal partition 3 that is more suitable for market application. The specific structural design is as follows:

[0037] The cross-section of the metal partition 3 is in a groove shape, and its shape is a triangular groove, a square groove or an arc groove, such as Figures 7 to 9As shown, the metal partition 3 divides the smoke exhaust duct into a main exhaust pipe and a secondary exhaust pipe. The secondary exhaust pipe is located at the upper part of the smoke exhaust duct and its lower end is connected to the exhaust valve installation port 7. The top end of the secondary exhaust pipe is open and serves as the exhaust port 9. A partition plate 8 is provided at the bottom end of the secondary exhaust pipe. The partition plate 8 functions to seal the lower end of the secondary exhaust pipe. The partition plate 8 is inclined upward. When the exhaust pipe downstairs exhausts upward, the partition plate 8 can play a guiding role to direct the flue gas into the main exhaust pipe, avoiding the generation of turbulence and making the flue gas discharge more smoothly. Its advantages are: the secondary exhaust pipe can play a certain role in blocking the flue gas from downstairs, and at the same time, only a 40-cm-long secondary exhaust pipe is needed, with low steel cost, easy to process, and high market acceptance; its disadvantages are: the structural stability of the smoke exhaust duct is a bit worse than that of the Y-shaped one, and there is only one main exhaust pipe, so it is impossible to carry out split and staggered exhaust.

[0038] The metal partition 3 is arranged at the exhaust port 9 and is inclined upward along the exhaust direction of the exhaust port 9. The inclined metal partition 3 can direct the flue gas rising from the lower secondary exhaust pipe 6 to the exhaust port 9 and discharge it into the main exhaust pipe through the exhaust port 9.

[0039] Since both the exhaust inner pipe 2 and the metal partition 3 of the present utility model are made of metal materials, there is no need for prior installation and fixation. They can be quickly assembled and fixed on-site. The orientation of the exhaust port 9 can be selected according to the actual situation on-site, and only different metal partitions 3 need to be replaced, which is very convenient. Therefore, the structure of the metal partition 3 is designed. Flanges 31 are provided on the side edges of the metal partition 3. The flanges 31 are closely attached to the inner side wall of the exhaust inner pipe 2. The design of the flanges 31 can facilitate the fitting with the inner wall of the exhaust inner pipe 2 so as to smoothly insert the metal partition 3 along the exhaust inner pipe 2.

[0040] A horizontal hanging plate 32 is bent on the upper end surface of the metal partition 3. The metal partition 3 is installed by overlapping it on the upper end of the exhaust inner pipe 2. During installation, the metal partition 3 can be overlapped on the exhaust duct through the hanging plate 32 and fixed after the upper and lower exhaust ducts are butted. To avoid insufficient firmness of the connection, the hanging plate 32 is spot-welded to the fixed exhaust inner pipe 2 to achieve reinforcement. When disassembly is required, the metal partition 3 can be taken out by melting the spot-welded position, which is very convenient.

[0041] When pouring the outer layer of cement mortar outer pipe 1, the exhaust inner pipe 2 can be directly used as the inner mold and there is no need for demolding. Only an outer mold is built around it for pouring. Hanging nails 10 are welded on the outer side wall of the exhaust inner pipe 2. The hanging nails 10 can limit the distance between the exhaust inner pipe 2 and the outer mold, ensuring the thickness of the poured cement mortar outer pipe 1, and at the same time increasing the structural connection stability between the cement mortar outer pipe 1 and the exhaust inner pipe 2 after pouring.

[0042] The exhaust inner pipe 2 and the metal partition 3 can also be replaced with a flame-retardant material with a smooth inner wall.

[0043] The above has introduced in detail a prefabricated plaster-free composite exhaust system provided by the present utility model. Specific examples are used in this article to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model; at the same time, for those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. It is possible to make changes and improvements to the present utility model without exceeding the concept and scope defined by the appended claims. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. An assembled plaster-free composite exhaust system, characterized in that: It comprises a square exhaust duct, which is an inner and outer double-layer composite structure, wherein the inner layer of the exhaust duct is a metal exhaust inner pipe, and the outer layer is a composite cement mortar outer pipe, a metal partition is vertically arranged inside the exhaust inner pipe, and the metal partition divides the exhaust inner pipe into a plurality of vertical independent exhaust ducts, and an exhaust valve installation port is opened at the upper part of the exhaust duct.

2. The assembled plaster-free composite exhaust system according to claim 1 is characterized in that: The metal partition is Y-shaped, and the metal partition divides the smoke exhaust duct into a left main exhaust pipe, a right main exhaust pipe and a secondary exhaust pipe in the middle triangle. The exhaust valve installation port is connected with the secondary exhaust pipe. The secondary exhaust pipe is provided with a partition plate, and the partition plate divides the secondary exhaust pipe into independent exhaust chambers on a floor basis. An exhaust port is provided on the top of the exhaust chamber, and the exhaust port is opened on the metal partition. The exhaust chamber is connected with the left main exhaust pipe or the right main exhaust pipe through the exhaust port.

3. The assembled plaster-free composite exhaust system according to claim 2 is characterized in that: The metal partition is arranged at the exhaust port and is arranged obliquely upward along the exhaust direction of the exhaust port.

4. The assembled plaster-free composite exhaust system according to claim 1 is characterized in that: The cross-section of the metal partition is groove-shaped, and the metal partition divides the smoke exhaust pipe into a main exhaust pipe and a secondary exhaust pipe. The secondary exhaust pipe is located at the upper part of the smoke exhaust pipe, and the lower end is connected to the exhaust valve installation port. The top end of the secondary exhaust pipe is open, and a partition plate is provided at the bottom end of the secondary exhaust pipe.

5. The assembled plaster-free composite exhaust system according to claim 4 is characterized in that: The partition plate is arranged obliquely upward.

6. The assembled plaster-free composite exhaust system according to claim 1 is characterized in that: The sides of the metal partition are all provided with flanges, and the flanges are closely attached to the inner wall of the exhaust inner pipe.

7. The assembled plaster-free composite exhaust system according to claim 1 is characterized in that: A horizontal hanging plate is bent on the upper end surface of the metal partition, and the metal partition is overlapped on the upper end of the exhaust inner pipe and spot welded to the fixed exhaust inner pipe. A limit block is provided on the inner wall of the exhaust inner pipe to limit the metal partition.

8. The assembled plaster-free composite exhaust system according to claim 1 is characterized in that: The exhaust inner pipe is a stainless steel pipe with a rough outer wall and a smooth inner wall.

9. The assembled plaster-free composite exhaust system according to claim 1 is characterized in that: A hanging nail is welded on the outer side wall of the exhaust inner pipe.

10. An assembled plaster-free composite exhaust system according to any one of claims 1 to 9, characterized in that: There are multiple groups of exhaust pipes, which are arranged in sequence along the vertical direction to form an exhaust system, and a hood is provided on the top of the exhaust system.

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