A smoke exhaust duct mold and use method thereof

Abstract

A smoke exhaust duct mold comprises an outer mold plate, an inner mold positioning former (3), a base (6) and an opening and closing device, wherein the outer mold plate and the inner mold positioning former (3) stand on the base (6), the outer mold plate comprises at least an L-shaped body (1) and a buckle body (2), the L-shaped body (1) and the buckle body (2) can be combined into a vertical mold body with an upper end open under the action of the opening and closing device, the inner mold positioning former (3) is located inside the vertical mold body, and is connected to a lifting device, which can move up and down in a vertical plane, and the inner mold positioning former (3) is provided with a slurry outlet (31) and a slurry inlet (32). The smoke exhaust duct mold of the present invention adopts the method of inner mold positioning molding slurry coating and steam delayed curing to produce a smoke exhaust duct with high strength and good quality, and is particularly suitable for assembly line operation to improve production efficiency.

Description

Technical Field

[0001] The invention relates to the field of building smoke exhaust ducts, and in particular to a smoke exhaust duct mold and a use method thereof. Background Art

[0002] With the continuous advancement of urban modernization, integrated residential smoke exhaust ducts have been widely used in construction projects. As we all know, smoke exhaust ducts are also called ventilation ducts, flues, and ventilation ducts. They are pipe products that centrally discharge the living smoke in the kitchen and bathroom of a house, and discharge the kitchen cooking oil smoke or the foul air in the bathroom.

[0003] At present, most of the exhaust ducts on the market are cement handmade flues and cement machine flues, which generally have the problems of low quality of prefabricated products, easy cracking, and airflow in floor flues that causes smoke and odor to flow back and forth between upper and lower floors. The production of such exhaust ducts mainly adopts three methods: on-site pure manual production, forming mold grouting, and internal mold pumping production, among which:

[0004] The purely manual production method has the problems of occupying a lot of space on site and serious waste of raw materials. In addition, the thickness of the smoke exhaust duct wall is affected by uncontrollable factors such as the operator's technical proficiency, attitude, awareness, and responsibility. The quality is difficult to guarantee, the labor intensity is high, and the work efficiency is low.

[0005] Although the grouting forming mold can effectively improve the uniformity of product thickness, in order to make the poured cement mortar flow, the water-cement ratio will be seriously unbalanced. After the cement is hydrated, the strength of the mortar is reduced, and cracks are easily generated. There are still problems such as reduced durability and uncontrollable problems.

[0006] Although the inner mold pumping production method can quickly demold, and grout with a high water-cement ratio in the short term, and then pump out the water to dry it to a low water-cement ratio, a large amount of cement has not been hydrated and solidified during molding. As the cement continues to hydrate in the later stage, the newly generated hydration products expand and produce microcracks, resulting in reduced strength.

[0007] In addition, there are also methods for producing flue gas ducts in the prior art that use special molds for rapid molding and demolding. For example, the application document of patent number CN106142335B discloses a method for producing a square flue gas duct and a special mold. The method uses a V-shaped special mold and an inverted V-shaped special mold mounted on the inner side of the upper part of the V-shaped special mold to cast and mold the four sides of the flue gas duct at one time. The cross-section of the cast flue gas duct is a square structure, and the special mold that is movable up and down can be easily demolded. However, the actual operation is complicated in the production process, and the cast flue gas duct is not convenient for steam maintenance at any time, the production efficiency is not high, and it is not suitable for mass production line operation. Summary of the invention

[0008] The present invention mainly solves the problems that the smoke exhaust duct produced in the prior art has complex production process and the finished product is prone to cracks, which causes the airflow to flow back and forth between the upper and lower layers. By providing a vertical smoke exhaust duct mold, the present invention adopts the method of inner mold positioning molding slurry coating and steam delayed curing to produce a high-strength and good-quality smoke exhaust duct, which is particularly suitable for assembly line operations and improves production efficiency.

[0009] The technical solution of the present invention is as follows:

[0010] A smoke exhaust duct mold comprises an outer mold plate, an inner mold positioning former, a base and an opening and closing device. The outer mold plate and the inner mold positioning former stand on the base. The outer mold plate at least comprises an L-shaped body and a buckle body. The buckle body comprises a straight plate and / or an L-plate. The L-shaped body and the buckle body can be combined into a vertical mold body with an upper end open under the action of the opening and closing device. The inner mold positioning former is located inside the vertical mold body and is connected to a lifting device so as to move up and down in a vertical plane. A slurry outlet and a slurry inlet are provided on the inner mold positioning former.

[0011] As described above, the smoke exhaust duct mold, the L-shaped body and the buckle body on the outer mold plate include a permeable plate surface layer and a vertical plate. The permeable plate surface layer is made of absorbent material and is arranged on the surface of the vertical plate and is used toward the inner mold positioning former side.

[0012] Furthermore, a heat-insulating layer is provided between the surface layer of the water-permeable board and the vertical board.

[0013] As described above, the smoke exhaust duct mold, the slurry inlet is located on the upper plane of the inner mold positioning former, which is convenient for connecting the slurry inlet pipe, and the slurry outlet is located on the lower side of the inner mold positioning former, slightly higher than the bottom plane.

[0014] Furthermore, a plurality of distance blocks are provided on the side of the inner mold positioning former, and the height of the distance blocks on the side of the inner mold positioning former is greater than the highest point of the slurry outlet. Preferably, the top of the distance block is a sliding member, which is located in the middle of the side of the inner mold positioning former to facilitate the inner mold positioning former to move up and down.

[0015] Preferably, a groove is provided on the side of the positioning former, and a distance block is arranged inside the groove and movably connected to the inner mold positioning former, and the length of the portion of the distance block exposed from the inner mold positioning former can be freely adjusted.

[0016] The smoke exhaust duct mold as described above also includes a heat-insulating layer cover plate, the size of which is larger than the inner diameter of the closed vertical body formed by the outer mold plates.

[0017] In the exhaust air duct mold as described above, the opening and closing device includes a plurality of mechanisms capable of linear telescopic movement, such as a conveyor belt, a slide, a hydraulic cylinder, a cylinder, an electric cylinder, etc., which are respectively connected to the L-shaped body and the buckle body of the outer template. A base is provided under the outer template, and the base can be a fixed base or can be respectively provided under the L-shaped body and the buckle body to move with the L-shaped body and the buckle body.

[0018] Furthermore, at least one steam inlet is provided on the outer template or the base below the outer template. Preferably, when the steam inlet is located on the outer template, it is arranged at the bottom.

[0019] A method for using the smoke exhaust duct mold as described above is characterized by comprising the following steps:

[0020] Step 1: Start the opening and closing device to combine the L-shaped body and the buckle body into a vertical body with an upper end open;

[0021] Step 2: Adjust the distance block to expose the inner mold positioning former to a certain height, insert the slurry inlet pipe into the slurry inlet port, and then lower the inner mold positioning former to the base;

[0022] Step 3: Start the slurry switch to allow the slurry to enter the inner mold positioning former and then flow out from the slurry outlet;

[0023] Step 4: Slowly lift the inner mold positioning former to evenly spread the slurry on the permeable panel layer;

[0024] Step 5: After the inner mold positioning former reaches the specified height, turn off the slurry switch and continue to raise the inner mold positioning former to make it higher than or away from the outer mold plate;

[0025] Step 6: Buckle the insulation layer cover plate on top of the outer template, turn on the steam switch, and allow steam to enter the inner space of the outer template from the steam inlet;

[0026] Step 7: Apply the inner mold positioning former to the subsequent production line, and the current exhaust gas duct enters the steam curing production line along with its mold;

[0027] Step 8: After steam curing is completed, start the opening and closing device to separate the outer template from the exhaust duct and take out the exhaust duct.

[0028] The beneficial effects of the present invention are:

[0029] 1. The smoke exhaust duct mold disclosed in the present invention does not need to lower the water-cement ratio of the slurry. A normal water-cement ratio suitable for the properties of cement is used to coat and shape the smoke exhaust duct, which effectively eliminates the defects of traditional pure manual production or grouting molding molds and inner mold pumping production, and improves the strength and quality of the smoke exhaust duct.

[0030] 2. The exhaust duct mold disclosed in the present invention has a water-permeable board surface layer and a heat-insulating layer on the inner side of the outer template, which is easy to absorb slurry. The subsequent steam curing can replenish the moisture of cement hydration during heating, so that the formed exhaust duct is further hydrated and condensed, so that the quality of the exhaust duct is effectively guaranteed.

[0031] 3. The exhaust duct mold disclosed in the present invention can be separated from the outer mold plate after the inner mold positioning former has coated one exhaust duct with slurry, and can continue to extend into another outer mold plate for coating with slurry. The completed outer mold plate and exhaust duct are transferred to the steam curing line at the back, and the production efficiency is greatly improved through assembly line production. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] By reading the detailed description of the preferred embodiment below, the scheme and advantages of the present application will become clear to those skilled in the art. The accompanying drawings are only for the purpose of illustrating the preferred embodiment and are not to be considered as limiting the present invention.

[0033] In the attached picture:

[0034] Figure 1 This is a structural schematic diagram of the present embodiment 1;

[0035] Figure 2 A half-section view of the former for positioning the outer mold plate and the inner mold;

[0036] Figure 3 It is a schematic diagram of the structure of each layer of the outer template;

[0037] The components represented by the reference numerals in the figure are:

[0038] 1. L-shaped body, 11. Permeable board surface layer, 12. Insulation layer, 13. Vertical board, 2. Buckle body, 3. Inner mold positioning former, 31. Slurry outlet, 32. Slurry inlet, 33. Distance block, 34. Pull rope, 4. Hydraulic cylinder, 5. Support seat, 6. Base, 61. Steam inlet. DETAILED DESCRIPTION

[0039] The exemplary embodiments of the present disclosure will be described in more detail below in conjunction with the accompanying drawings. It should be noted that these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. The present disclosure can be implemented in various forms and should not be limited by the embodiments described herein.

[0040] Example 1

[0041] See also Figure 1 , Figure 1This is a smoke exhaust duct mold of the present embodiment, including an outer template, an inner mold positioning former 3, a base 6 and an opening and closing device. The outer template and the inner mold positioning former 3 stand on the base 6. The outer template includes an L-shaped body 1 and a buckle body 2. The L-shaped body 1 is an integral structure, including two right-angled sides. The buckle body 2 is an L-plate, or an L-plate is formed by two straight plates. The buckle body 2 in this embodiment adopts an L-plate with a similar structure to the L-shaped body 1. Preferably, the size of the buckle body 2 is slightly smaller than the L-shaped body 1. The opening and closing device is connected to the rear side of the L-shaped body 1 and the buckle body 2, and can be opened and closed under the action of the opening and closing device. When the L-shaped body 1 and the buckle body 2 are closed together, the two can be combined into a cubic structure with an open upper end.

[0042] Furthermore, the inner mold positioning former 3 is located inside the outer mold plate, and is connected to a lifting device so as to be able to move up and down in a vertical plane. The inner mold positioning former 3 is provided with a slurry outlet 31 and a slurry inlet 32. The slurry inlet 32 ​​is connected to a slurry inlet pipe 35, and the slurry can enter from the slurry inlet 32 ​​and flow out from the slurry outlet 31.

[0043] Further, the slurry inlet 32 ​​is located in the middle of the upper plane of the inner mold positioning former 3, which is convenient for connecting the slurry inlet pipe 35, and the slurry outlet 31 is located on the lower side of the inner mold positioning former 3, slightly higher than the bottom plane, see Figure 2 Preferably, the slurry outlet 31 is a flat structure, and the opening is preferably such that the slurry can flow out. The outflowing slurry is smeared on the inner side of the outer template, and then adhered to the inner side of the outer template under the pressure of the lower side of the slurry outlet 31.

[0044] Furthermore, a plurality of distance blocks 33 are provided on the side of the inner mold positioning former 3 to limit the thickness of the exhaust gas duct to be processed, and the height of the distance blocks 33 on the side of the inner mold positioning former 3 is greater than the highest point of the slurry outlet 31. Preferably, a pulley is provided on the top of the distance block 33 to facilitate the up and down movement of the inner mold positioning former 3. The distance block 33 is assembled on the side of the inner mold positioning former 3 through a movable support frame (not shown in the figure), and a groove is provided in the middle position of the side of the inner mold positioning former 3 for placing the distance block 33 and the movable support frame, and the movable support frame can adjust the length of the distance block 33 exposed from the inner mold positioning former 3.

[0045] Furthermore, a lifting device is provided above the inner mold positioning former 3 , and the lifting device drives the inner mold positioning former 3 to move up and down through a pull rope 34 .

[0046] In this embodiment, the L-shaped body 1 and the buckle body 2 on the outer template are multi-layer structures, which are the vertical plate 13, the insulation layer 12 and the permeable plate surface layer 11 from the outside to the inside. Figure 3The permeable board surface layer 11 is made of water-absorbing material and is used toward the side of the inner mold positioning former 3. When the slurry flowing out of the slurry outlet 31 is applied to the outer template, it will directly contact the permeable board surface layer 11, which helps the slurry to adhere to the outer template and prevent it from flowing downward. Preferably, the cement slurry used in this embodiment conforms to the physical and chemical properties of the cement water-cement ratio. After the slurry is applied to the permeable board surface layer 11, it continues to adhere to the permeable board surface layer 11 under the extrusion of the lower end of the inner mold positioning former 3. Compared with the thin cement ash used in traditional grouting, the strength of the smoke exhaust duct is greatly improved.

[0047] In this embodiment, the opening and closing device is located at the rear of the L-shaped body 1 and the buckle body 2, and includes a hydraulic cylinder 4 and a support seat 5. The telescopic distance of the hydraulic cylinder 4 is greater than the width of the smoke exhaust duct, and its end is fixed on the support seat 5. Preferably, the hydraulic cylinder 4 includes multiple groups, which can clamp the upper and lower sides of the L-shaped body 1 and the buckle body 2 at the same time to ensure that the L-shaped body 1 and the buckle body 2 are in close contact. As an alternative, the opening and closing device can also be realized by a slideway, and the slideway includes a slide plate under the L-shaped body 1 and a slide plate under the buckle body 2. The slide plate can move linearly along the fixed slideway to realize the opening and closing operation of the L-shaped body 1 and the buckle body 2.

[0048] In this embodiment, at least one steam inlet 61 is provided on the outer template or the base 6 below it. The steam inlet 61 in this embodiment is located at the center of the base 6, and is connected to a steam pipeline and a steam supply valve at the bottom. When the inner mold positioning former 3 is coated with slurry, the steam supply valve is opened to supply steam to the inner side of the outer template to perform steam maintenance on the exhaust air duct.

[0049] Furthermore, a special insulation layer cover plate (not shown) is provided above the outer formwork, and the size of the insulation layer cover plate is larger than the size of the smoke exhaust duct. When the smoke exhaust duct is steam-cured, the insulation layer cover plate on the top and the insulation layer 12 in the middle layer of the outer formwork can effectively maintain the internal temperature and humidity of the outer formwork.

[0050] Specifically, the method for using the smoke exhaust duct mold includes the following steps:

[0051] Step 1: Start the opening and closing device, so that the hydraulic cylinder 4 pushes the L-shaped body 1 and the buckle body 2 to form a vertical body with an upper end opening;

[0052] Step 2: Adjust the distance block 33 to expose the inner mold positioning former 3 to a certain height, insert the slurry inlet pipe 35 into the slurry inlet port 32, and then lower the inner mold positioning former 3 to the base 6;

[0053] Step 3: Start the slurry switch to allow the slurry to enter the inner mold positioning former 3 and then flow out from the slurry outlet 31;

[0054] Step 4: slowly lift the inner mold positioning former 3 so that the slurry flowing out of the slurry outlet 31 is evenly smeared on the water-permeable panel layer 11;

[0055] Step 5: After the inner mold positioning former 3 reaches the specified height, turn off the slurry switch and continue to raise the inner mold positioning former 3 to make it higher than or away from the outer mold plate;

[0056] Step 6: buckle the insulation layer cover plate above the outer template, turn on the steam switch, and allow steam to enter the inner space of the outer template from the steam inlet 61;

[0057] Step 7: Apply the lifted inner mold positioning former 3 to the outer mold plate on the subsequent production line, and the current exhaust gas duct enters the steam curing production line along with the outer mold plate;

[0058] Step 8: After the steam curing is completed, the hydraulic cylinder 4 is retracted to separate the outer template from the exhaust duct, and the exhaust duct is taken out.

[0059] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or additions, subtractions or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A smoke exhaust duct mold, characterized in that: The invention comprises an outer mold plate, an inner mold positioning former (3), a base (6) and an opening and closing device, wherein the outer mold plate and the inner mold positioning former (3) are erected on the base (6), the outer mold plate comprises at least an L-shaped body (1) and a buckle body (2), the L-shaped body (1) and the buckle body (2) can be combined into a vertical mold body with an upper end open under the action of the opening and closing device, the inner mold positioning former (3) is located inside the vertical mold body, is connected to a lifting device and can move up and down in a vertical plane, and the inner mold positioning former (3) is provided with a slurry outlet (31) and a slurry inlet (32); The slurry inlet (32) is located on the upper plane of the inner mold positioning shaper (3), and the slurry outlet (31) is located on the lower side of the inner mold positioning shaper (3); The slurry outlet (31) is a flat structure.

2. A smoke exhaust duct mold according to claim 1, characterized in that: The buckle body (2) comprises a straight plate and / or an L-plate.

3. A smoke exhaust duct mold according to claim 1, characterized in that: The L-shaped body (1) and the buckled body (2) comprise a water-permeable plate surface layer (11) and a vertical plate (13), wherein the water-permeable plate surface layer (11) faces the side of the inner mold positioning former (3).

4. A smoke exhaust duct mold according to claim 3, characterized in that: A heat-insulating layer (12) is also provided between the water-permeable board surface layer (11) and the vertical board (13).

5. The smoke exhaust duct mold according to claim 1, characterized in that: At least one steam inlet (61) is provided on the outer template or the base (6) below the outer template.

6. A smoke exhaust duct mold according to claim 4, characterized in that: A plurality of distance blocks (33) are provided on the side of the inner mold positioning former (3), and the height of the distance blocks (33) is greater than the highest point of the slurry outlet (31).

7. A smoke exhaust duct mold according to claim 6, characterized in that: The distance block (33) is movably connected to the inner mold positioning former (3), and the portion of the distance block (33) exposed from the inner mold positioning former (3) can be freely adjusted.

8. The smoke exhaust duct mold according to claim 7, characterized in that: It also includes a heat-insulating layer cover plate, the size of which is larger than the inner diameter of a closed vertical body formed by combining the outer templates.

9. A method for using the smoke exhaust duct mold according to claim 8, characterized in that: The following steps are involved: Step 1: activating the opening and closing device so that the L-shaped body (1) and the buckle body (2) are combined into a vertical body with an open top; Step 2: adjusting the distance block (33) to expose the inner mold positioning former (3) to a certain height, inserting the slurry inlet pipe (35) into the slurry inlet port (32), and then lowering the inner mold positioning former (3) onto the base (6); Step 3: activating the slurry switch, so that the slurry enters the inner mold positioning forming device (3) and then flows out from the slurry outlet (31); Step 4: slowly lifting the inner mold positioning former (3) to evenly spread the slurry on the permeable board surface layer (11); Step 5: After the inner mold positioning former (3) reaches the specified height, turn off the slurry switch and continue to raise the inner mold positioning former (3) so that it is higher than or away from the outer mold plate; Step 6: buckle the insulation layer cover plate onto the outer template, turn on the steam switch, and allow steam to enter the inner space of the outer template from the steam inlet (61); Step 7: Apply the inner mold positioning former (3) to the subsequent production line, and the current exhaust gas duct enters the steam curing production line along with its mold; Step 8: After steam curing is completed, start the opening and closing device to separate the outer template from the exhaust duct and take out the exhaust duct.

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