Spiral exhaust pipe, exhaust pipe splicing auxiliary equipment and splicing method

Abstract

The invention relates to a spiral exhaust pipe, exhaust pipe splicing auxiliary equipment and a splicing method, and belongs to the technical field of industrial ventilation, the spiral exhaust pipe comprises multiple spiral pipe fitting units and splicing pieces, the multiple spiral pipe fitting units are used for being sequentially spliced to form the exhaust pipe, and the splicing pieces are used for splicing the multiple spiral pipe fitting units to form the spiral exhaust pipe. The spiral pipe fitting units are formed by spirally bending and rolling sheet-shaped base materials, and the splicing pieces are used for connecting the adjacent spiral pipe fitting units. The method has the effect of reducing the transportation cost.

Description

Technical Field

[0001] This application relates to the field of industrial ventilation technology, and in particular to a spiral exhaust duct, exhaust duct splicing auxiliary equipment, and splicing method. Background Technology

[0002] Exhaust ducts are an important component of industrial ventilation systems, primarily used to exhaust harmful gases from their source to the outdoors or to purification equipment, powered by a fan.

[0003] Traditional exhaust ducts are mostly molded as a whole and then transported to the installation site by special vehicles for installation; because the molded exhaust ducts take up a lot of space, the transportation cost is high. Summary of the Invention

[0004] To help reduce transportation costs, this application provides a spiral exhaust duct, exhaust duct splicing auxiliary equipment, and splicing method.

[0005] Firstly, the spiral exhaust duct provided in this application adopts the following technical solution: A spiral exhaust duct, comprising: A spiral tube unit, comprising multiple spiral tube units, which are sequentially spliced ​​together to form an exhaust duct, wherein the spiral tube unit is formed by spirally bending and rolling a sheet substrate. Connecting components are used to connect adjacent spiral tube units.

[0006] Preferably, a male buckle is provided on one side of the sheet substrate and a female buckle is provided on the other side. The female buckle is used to engage with the male buckle during the spiral bending of the sheet substrate, and a pipe clamp is fitted on the spiral pipe unit.

[0007] Preferably, the splicing component includes a connector, a sealing ring, and a heat-shrink sleeve. Two connectors are arranged opposite each other, and each connector corresponds to a spiral tube unit on both sides. The connector extends into the opening of the corresponding spiral tube unit. The sealing ring is located between the two connectors, and the two connectors are detachably connected. The heat-shrink sleeve corresponds to each connector and is used to be heat-shrinked and fitted onto the outer wall of the corresponding connector and spiral tube unit.

[0008] Secondly, the exhaust pipe splicing auxiliary equipment provided in this application adopts the following technical solution: An auxiliary device for splicing exhaust pipes, used to assist in splicing the spiral exhaust pipes, comprising: Base; A tube-winding mechanism, which is mounted on a machine base, is used to spirally bend sheet-like substrates into spiral tube units; A clamping and fixing mechanism is mounted on the machine base and is used to clamp and fix the spiral tube unit formed by bending.

[0009] Preferably, the tube winding mechanism includes a support base, a support roller, a positioning base, a positioning roller, a support, a pressure roller, and a feeder. The end of the support base away from the clamping and fixing mechanism is disposed on the machine base. The support roller is rotatably mounted on the support base and is used to abut against the inner wall of the sheet substrate when it is bent. Multiple positioning bases are provided, and all of the multiple positioning bases are disposed on the machine base. The support base is located between the multiple positioning bases. The positioning roller corresponds to each positioning base and is mounted on the corresponding positioning base. The multiple positioning rollers are distributed circumferentially at intervals along the center of the sheet substrate when it is bent. The positioning roller is used to roll against the outer wall of the sheet substrate when it is spirally bent. The support is disposed on the machine base. The pressure roller is mounted on the support and is used to abut against the sheet substrate. The pressure roller and the support roller are respectively located on opposite sides of the sheet substrate. The feeder is disposed on the machine base and is used to drive the sheet substrate to continuously enter toward the support roller. The sheet substrate entering from the feeder slides against the pressure roller, the support roller, and the multiple positioning rollers in sequence.

[0010] Preferably, the clamping and fixing mechanism includes a mounting base and a supporting clamping assembly. The mounting base is disposed on the machine base and is located on the discharge side of the tube winding mechanism. The supporting clamping assembly is disposed on the mounting base and is used to clamp and fix the spiral tube unit.

[0011] Preferably, the support clamping assembly includes two clamping seats that are slidably disposed relative to each other. The clamping seats are slidably disposed on the mounting base. The clamping seats have arc surfaces for fitting against the outer wall of the spiral pipe unit. The mounting base is provided with a clamping drive source for driving the two clamping seats to move closer or further apart from each other.

[0012] Preferably, the splicing auxiliary equipment further includes an airtightness testing mechanism, which is mounted on the mounting base. The airtightness testing mechanism includes a support plate, a sealing cover plate, a testing cover plate, a testing hood, and a rotation drive source. The support plate is rotatably mounted on opposite sides of the mounting base. The sealing cover plate and the testing cover plate are rotatably mounted on the two support plates respectively. The sealing cover plate and the testing cover plate are located at both ends of the spiral tube unit on the mounting base. The sealing cover plate is used to abut against one end of the spiral tube unit on the mounting base, and the testing cover plate is used to abut against the other end of the spiral tube unit on the mounting base. A ventilation pipe is connected to the testing cover plate, which is used to connect to an external air source. The testing hood is hinged to the mounting base and is used to determine the airtightness of the spiral tube unit on the mounting base. The rotation drive source is used to drive the two support plates to rotate.

[0013] Preferably, the detection cover has a mesh structure and multiple ribbons are provided on the detection cover.

[0014] Thirdly, this application provides a method for splicing exhaust pipes, which adopts the following technical solution: A method for splicing exhaust ducts, using the aforementioned exhaust duct splicing auxiliary equipment, further includes the following steps: The sheet substrate is placed into the tube winding mechanism, which spirally winds the sheet substrate into a spiral tube unit, and positions it using male and female buckles on the sheet substrate. Next, the spiral pipe unit is clamped and fixed by the clamping and fixing mechanism, and the end of the spiral pipe unit is cut to form a flat end; Then install pipe clamps on the outside of the spiral pipe unit; Next, multiple spiral pipe units are connected in sequence using splicing components to complete the assembly of the exhaust pipe.

[0015] In summary, this application includes the following beneficial technical effects: When assembling exhaust ducts, multiple sheet-like substrates are spirally bent into multiple spiral pipes at the installation site using assembly auxiliary equipment. Then, the ends of the multiple spiral pipes are cut to form flat ports. Next, multiple spiral pipe units are connected in sequence using splicing components to complete the assembly of the exhaust duct. Since the sheet-like substrates can be stacked and occupy little space, only one set of assembly auxiliary equipment needs to be transported, which helps to reduce transportation costs compared to transporting the pre-formed exhaust duct. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the spiral exhaust duct according to an embodiment of this application.

[0017] Figure 2 This is a partial structural cross-sectional view of the spiral exhaust duct according to an embodiment of this application.

[0018] Figure 3 yes Figure 2 Enlarged view of part A in the middle.

[0019] Figure 4 This is a schematic diagram of the overall structure of the exhaust pipe splicing auxiliary equipment in the embodiment of this application.

[0020] Figure 5 This is a schematic diagram of the overall structure of the exhaust pipe splicing auxiliary equipment from another perspective in the embodiments of this application.

[0021] Figure 6 This is a partial exploded view of the exhaust pipe splicing auxiliary equipment in an embodiment of this application.

[0022] Explanation of reference numerals in the attached drawings: 1. Spiral pipe unit; 2. Sheet substrate; 3. Male buckle; 4. Female buckle; 5. Pipe clamp; 6. Splice; 61. Connector; 62. Sealing ring; 63. Heat shrink sleeve; 7. Machine base; 8. Support base; 9. Support roller; 10. Positioning base; 11. Positioning roller; 12. Support; 13. Pressure roller; 14. Feeder; 15. Mounting base; 16. Clamping base; 17. Clamping drive source; 171. Gear motor; 172. Bidirectional screw; 18. Support plate; 19. Sealing cover plate; 21. Detection cover plate; 22. Detection cover; 23. Rotation drive source; 24. Ventilation pipe; 25. Belt; 26. Placement port. Detailed Implementation

[0023] The following combination Figures 1-6 This application will be described in further detail.

[0024] This application discloses a spiral exhaust duct. (Refer to...) Figure 1 and Figure 2 The spiral exhaust duct includes spiral pipe unit 1 and splicing component 6. Multiple spiral pipe units 1 are sequentially spliced ​​to form the exhaust duct. Each spiral pipe unit 1 is formed by spirally bending and rolling a sheet-like substrate 2, resulting in a circular cross-section. Specifically, the sheet-like substrate 2 is elongated and made of a steel-plastic composite material. The steel-plastic composite sheet-like substrate 2 has a steel middle layer, with inner and outer layers made of plastic materials such as polypropylene or polyethylene. It combines the strength of steel with the corrosion resistance of plastic, and possesses better static electricity conductivity and flame retardancy compared to inorganic fiberglass ducts and pure plastic ducts. The splicing component 6 is used to connect two adjacent spiral pipe units 1.

[0025] When assembling the exhaust duct, multiple sheet-like substrates 2 are spirally bent into multiple spiral pipe units 1 using assembly auxiliary equipment at the installation site. Then, the two ends of the multiple spiral pipe units 1 are cut to form flat ports. Next, the multiple spiral pipe units 1 are connected in sequence using splicing parts 6 to complete the assembly of the exhaust duct. Since the sheet-like substrates 2 can be stacked and occupy little space, and only one set of assembly auxiliary equipment needs to be transported, it helps to reduce transportation costs compared to transporting the whole pre-formed exhaust duct.

[0026] Reference Figure 2 and Figure 3 The sheet substrate 2 has a male buckle 3 integrally formed on one side and a female buckle 4 integrally formed on the other side. Specifically, the male buckle 3 and the female buckle 4 are located on the same side of the sheet substrate 2, that is, on the outer wall after being rolled into a tube. The female buckle 4 is used to engage with the male buckle 3 during the spiral bending of the sheet substrate 2. Through the engagement of the male buckle 3 and the female buckle 4, the spiral bending of the sheet substrate 2 can be positioned and engaged.

[0027] Reference Figure 2 and Figure 3 The cross-sectional shape of the male buckle 3 and the female buckle 4 is designed in an Ω shape, which prevents them from easily falling off after being engaged under external force. The male buckle 3 and the female buckle 4 form a single unit after being tightened, which helps improve the rigidity of the spiral pipe unit 1 and makes it less prone to deformation when negative pressure is generated during pipe ventilation. Furthermore, the male buckle 3 has a groove. This groove allows the male buckle 3 to be forcibly contracted towards the center under external force when engaged with the female buckle 4, facilitating the engagement. Additionally, the groove can be filled with sealant or a sealing strip, helping to ensure the sealing performance of the spiral pipe unit 1.

[0028] Reference Figure 2 and Figure 3 To ensure the structural stability and strength of the spiral pipe unit 1, a clamp 5 is fitted onto the spiral pipe unit 1 for tightening it. Specifically, the clamp 5 consists of two U-shaped semi-clamps, which are fitted over the circular spiral pipe unit 1 and fixed with bolts and nuts. The joint of the two semi-clamps can be designed at the corresponding cross-section of the spiral pipe unit 1 at the sub-clamp 3 position, so that the semi-clamps can fit well against the outer wall of the spiral pipe unit 1 at the corresponding position. To improve the fixing effect of the spiral pipe unit 1, clamps 5 are distributed at both ends of each spiral pipe unit 1.

[0029] Reference Figure 1 and Figure 2 To facilitate the connection of adjacent spiral pipe fitting units 1, the splice 6 includes a connector 61, a sealing ring 62, and a heat shrink sleeve 63. The connector 61 specifically adopts a connecting flange, and two connectors 61 are arranged opposite each other, with each connector 61 corresponding to one of the spiral pipe fitting units 1 on both sides. One end of the connector 61 extends into the pipe opening of the corresponding spiral pipe fitting unit 1 and fits against its inner wall. The sealing ring 62 is located between the two connectors 61. The two connectors 61 are detachably connected, specifically, by bolts and nuts. In other embodiments, in conjunction with the detachable connection, the two connectors 61 can also be fixed by means of rivets, interference fits, etc. A heat-shrink sleeve 63 corresponds one-to-one with each connector 61, and is fitted onto the corresponding connector 61. Specifically, the heat-shrink sleeve 63 is used to heat-shrink and fit onto the outer wall of the corresponding connector 61 and the spiral pipe unit 1. The heat-shrink sleeve 63 is made of double-layer polyethylene material. By heating, the heat-shrink sleeve 63 tightly wraps around the connector 61 and the corresponding spiral pipe unit 1 on one side, which helps to improve the connection sealing effect. Because the splice 6 is a detachable structure, the exhaust pipe can meet the requirements for disassembly and recycling.

[0030] The implementation principle of the spiral exhaust duct in this application embodiment is as follows: When assembling the exhaust duct, multiple sheet-like substrates 2 are spirally bent sequentially to form multiple spiral pipe units 1 using assembly auxiliary equipment at the installation site. During the bending process, the male and female buckles 3 and 4 on the sheet-like substrates 2 are used for positioning and engagement. Then, the ends of the spiral pipe units 1 are cut to form flat ends. Next, pipe clamps 5 are installed at both ends of each spiral pipe unit 1. Then, multiple spiral pipe units 1 are arranged sequentially along their own length direction. Next, two heat shrink sleeves 63 are respectively fitted onto the corresponding connectors 61. Then, the two connectors 61 are placed between adjacent spiral pipe units 1, and the ends of the two connectors 61 are inserted into the corresponding... Inside the port of one spiral pipe unit 1, a sealing ring 62 is placed between two connectors 61. The two connectors 61 are fixed relative to each other with bolts and nuts. Then, the position of the heat shrink sleeve 63 is adjusted so that the heat shrink sleeve 63 covers the outer wall of the corresponding connector 61 and the outer wall of the corresponding spiral pipe unit 1. Then, the heat shrink sleeve 63 is heated so that it tightly wraps around the joint between the connector 61 and the corresponding spiral pipe unit 1. Multiple spiral pipe units 1 are connected in sequence through the splicing piece 6 to complete the assembly of the exhaust pipe. Since the sheet substrate 2 can be stacked and occupies little space, and only one set of assembly auxiliary equipment needs to be transported, it helps to reduce transportation costs compared to transporting the integrally formed exhaust pipe.

[0031] This application also discloses an auxiliary device for splicing exhaust pipes. (Refer to...) Figure 4 and Figure 5 The exhaust pipe splicing auxiliary equipment is used to splice the above-mentioned spiral exhaust pipes. Specifically, it includes a base 7, a pipe rolling mechanism, and a clamping and fixing mechanism. The pipe rolling mechanism is set on the base 7 and is used to spirally bend and roll the sheet substrate 2 into a spiral pipe unit 1. The clamping and fixing mechanism is set on the base 7 and is used to clamp and fix the rolled spiral pipe unit 1.

[0032] When installing the exhaust duct, the splicing auxiliary equipment is transported to the installation site. Multiple sheet substrates 2 are spirally bent and rolled into spiral pipe units 1 by the pipe rolling mechanism. Then, the rolled spiral pipe units 1 are clamped and fixed by the clamping and fixing mechanism to facilitate the cutting of the ends of the spiral pipe units 1, which facilitates the installation of pipe clamps 5 and the splicing of adjacent spiral pipe units 1.

[0033] Reference Figure 4 and Figure 5To facilitate the spiral bending and rolling of the sheet substrate 2 into a spiral tube unit 1, a frame is fixed on the machine base 7. The tube winding mechanism includes a support seat 8, a support roller 9, a positioning seat 10, a positioning roller 11, a support 12, a pressure roller 13, and a feeder 14. The end of the support seat 8 away from the clamping and fixing mechanism is fixedly mounted on the frame of the machine base 7. The support roller 9 is rotatably mounted on the support seat 8 and is located above the support seat 8. The support roller 9 is used to abut against the inner wall of the sheet substrate 2 during bending. Multiple positioning seats 10 are provided, and all positioning seats 10 are set on the machine base 7 driving frame. The support seat 8 is located on the support seat 8. Positioning rollers 11 are positioned one-to-one with each positioning seat 10, and are rotatably mounted on their respective seats 10. The positioning rollers 11 are circumferentially spaced along the center of the sheet substrate 2 during bending. The positioning rollers 11 abut against the outer wall of the sheet substrate 2 during spiral bending. Supports 12 are mounted on the frame of the machine base 7, and pressure rollers 13 are rotatably mounted on the supports 12 for abutting against the sheet substrate 2. The pressure rollers 13 and support rollers 9 are located on opposite sides of the sheet substrate 2. Specifically, the rotation axes of the support rollers 9, positioning rollers 11, and pressure rollers 13 are parallel. In other embodiments, the positioning seats 10 and supports 12 can also be mounted on the frame of the machine base 7 via telescopic cylinders to facilitate bending into spiral tube units 1 of different diameters.

[0034] Reference Figure 4 and Figure 5 The feeder 14 is fixed on the base 7. The feeder 14 has a placement port 26 for the sheet substrate 2 to pass through. The feeder 14 also has a pair of feeding rollers (not shown in the figure) for driving the sheet substrate 2 forward. The feeding rollers are driven by a motor. The sheet substrate 2 entering from the feeder 14 slides against the pressure roller 13, the support roller 9, and multiple positioning rollers 11 in sequence. The tube winding mechanism and the feeder 14 are both existing technologies; their specific connection structures and principles will not be elaborated here.

[0035] Reference Figure 4 and Figure 5 To facilitate engagement with the male buckle 3 and female buckle 4 on the sheet substrate 2, the positioning roller 11 has an annular groove (not shown in the figure) for engaging with the male buckle 3 and female buckle 4.

[0036] During the coiling process, the sheet substrate 2 is placed into the placement port 26 at a certain angle to the axis of the support roller 9. The male buckle 3 and female buckle 4 on the sheet substrate 2 are located on the side away from the support roller 9. Under the action of the feeder 14, the sheet substrate 2 is conveyed forward, so that the sheet substrate 2 passes through the pressure roller 13, the support roller 9 and multiple positioning rollers 11 in sequence. The support roller 9 is located on the inner side of the sheet substrate 2, and the multiple positioning rollers 11 are located on the outer side of the sheet substrate 2. As the sheet substrate 2 is continuously fed in, it is spirally bent to form the spiral tube unit 1.

[0037] Reference Figure 4 and Figure 6 To facilitate clamping and fixing of the spiral pipe unit 1, the clamping and fixing mechanism includes a mounting base 15 and a support clamping assembly. The mounting base 15 is fixedly connected to the machine base 7 by bolts. The mounting base 15 is located on the side of the pipe winding mechanism's discharge. The support clamping assembly is respectively set on the mounting base 15. The support clamping assembly is used to clamp and fix the spiral pipe unit 1.

[0038] Reference Figure 4 and Figure 6 To facilitate clamping and fixing of the spiral pipe unit 1, the support clamping assembly includes two clamping seats 16. The two clamping seats 16 are slidably disposed on the mounting base 15. The clamping seats 16 and the mounting base 15 are slidably engaged by guide rails. The sliding direction of the clamping seats 16 is perpendicular to the rotation axis of the support roller 9. The clamping seats 16 have arc surfaces for fitting against the outer wall of the spiral pipe unit 1. The mounting base 15 is provided with a clamping drive source 17 for driving the two clamping seats 16 to move closer or further apart.

[0039] Reference Figure 4 and Figure 6 To facilitate the movement of the two corresponding clamping seats 16 closer together or further apart, the clamping drive source 17 can employ a combination of a geared motor 171 and a bidirectional screw 172. The geared motor 171 is fixedly mounted on the corresponding mounting base 15, and the bidirectional screw 172 is fixed to the output shaft of the geared motor 171. The two corresponding clamping seats 16 are threadedly connected to both ends of the bidirectional screw 172. By starting the geared motor 171, the bidirectional screw 172 is driven to rotate, causing the two clamping seats 16 to move closer together or further apart, thereby clamping or releasing the spiral pipe unit 1. Alternatively, the clamping drive source 17 can also be an electric cylinder, with each electric cylinder corresponding to one of the clamping seats 16. The electric cylinder is mounted on the mounting base 15, and the output end of the clamping seat 16 is fixed to the corresponding electric cylinder. Using an electric cylinder can also achieve the same effect of moving the two clamping seats 16 closer together or further apart.

[0040] The spiral pipe unit 1 output from the pipe winding mechanism gradually moves between the two clamping seats 16 of the mounting base 15. After a sheet substrate 2 is completely bent, the spiral pipe unit 1 moves toward the mounting base 15 so that the center of the spiral pipe unit 1 is aligned with the center of the mounting base 15. Then, the clamping drive source 17 drives the two clamping seats 16 on the mounting base 15 to clamp the spiral pipe unit 1, thereby facilitating the cutting of both ends of the spiral pipe unit 1 and the installation of the pipe clamp 5.

[0041] Reference Figure 4 and Figure 6To facilitate the assessment of the airtightness of the spiral pipe unit 1, the splicing auxiliary equipment also includes an airtightness testing mechanism. This mechanism is mounted on the mounting base 15 and includes support plates 18, sealing cover plates 19, testing cover plates 21, a testing hood 22, and a rotation drive source 23. The support plates 18 are rotatably mounted on opposite sides of the mounting base 15, with their rotation axes parallel to the rotation axis of the support roller 9. The sealing cover plates 19 and 21 are rotatably mounted on the two support plates 18, with their rotation axes parallel to the rotation axis of the support plates 18. The sealing cover plates 19 and 21 are located on the mounting base 15. Specifically, at both ends of the spiral pipe unit 1, the sealing cover plate 19 is located on the side of the mounting base 15 near the pipe winding mechanism. The sealing cover plate 19 is used to abut against the end of the spiral pipe unit 1 on the mounting base 15 near the pipe winding mechanism. The detection cover plate 21 is used to abut against the other end of the spiral pipe unit 1 on the mounting base 15. A ventilation pipe 24 is connected to the detection cover plate 21. The ventilation pipe 24 is used to connect to an external air source through a flexible hose. The detection cover 22 is hinged to the mounting base 15. The hinge axis of the detection cover 22 is parallel to the rotation axis of the support plate 18. The detection cover 22 is used to determine the airtightness of the spiral pipe unit 1 on the mounting base 15. The rotation drive source 23 is used to drive the two support plates 18 to rotate.

[0042] Reference Figure 6 The rotation drive source 23 is installed on the side of the mounting base 15 and corresponds one-to-one with the support plate 18. Specifically, the rotation drive source 23 can be one of a servo geared motor, stepper geared motor, or geared motor, etc., without limitation. The support plate 18 is fixed to the output shaft of the corresponding rotation drive source 23. When the support plate 18 rotates to the vertically upward position, the sealing cover plate 19 and the detection cover plate 21 are both concentrically arranged with the spiral tube unit 1 on the clamping base 16. To facilitate judgment by operators, the detection cover 22 has a mesh structure and multiple flexible ribbons 25 are provided on the detection cover 22. The length of the ribbons 25 is less than 10cm.

[0043] The implementation principle of the exhaust pipe splicing auxiliary equipment in this application embodiment is as follows: When installing the exhaust pipe, the splicing auxiliary equipment is transported to the installation site. The sheet substrate 2 is placed into the placement port 26 at a certain angle with the axis of the support roller 9. The male buckle 3 and female buckle 4 on the sheet substrate 2 are located on the side away from the support roller 9. Under the action of the feeder 14, the sheet substrate 2 is conveyed forward, so that the sheet substrate 2 passes through the pressure roller 13, the support roller 9 and multiple positioning rollers 11 in sequence. The support roller 9 is located on the inner side of the sheet substrate 2, and the multiple positioning rollers 11 are located on the outer side of the sheet substrate 2. As the sheet substrate 2 is continuously fed in, it is spirally bent to form a spiral pipe unit 1. When a sheet substrate 2 is completely bent, the spiral pipe unit 1 is moved toward the mounting seat 15 so that the spiral pipe unit 1 is located on the two clamping seats 16 and the center is aligned with the center of the mounting seat 15. Then, the clamping drive source 17 drives the two clamping seats 16 to clamp the spiral pipe unit 1. Then, the two ends of the spiral pipe unit 1 are cut, and then the pipe clamp 5 is installed.

[0044] After the pipe clamp 5 is installed, drive the two clamping seats 16 to release the spiral pipe fitting unit 1. At this time, the spiral pipe fitting unit 1 is still located on the two clamping seats 16 but can rotate. Then start the rotation drive source 23, which drives the two support plates 18 to rotate towards the spiral pipe fitting unit 1 until the support plates 18 rotate to a vertically upward position. At this time, the sealing cover plate 19 and the detection cover plate 21 will seal the two ends of the corresponding spiral pipe fitting unit 1. Then rotate the detection cover 22 towards the spiral pipe fitting unit 1 so that the detection cover 22 covers the spiral pipe fitting unit 1. Connect the external air source, and the airflow enters the spiral pipe fitting unit 1 through the ventilation pipe 24. Manually rotate the sealing cover plate 19 and the detection cover plate 21 to drive the spiral pipe fitting unit 1 to rotate and observe the inspection. If the ribbon 25 on the test cover 22 flutters, it proves that there is a leak in the spiral pipe unit 1; if not, it proves that the airtightness of the spiral pipe unit 1 meets the requirements, thus facilitating the operator to judge the airtightness and leak location of the spiral pipe unit 1. After the test is completed, the test cover 22 is flipped away from the spiral pipe unit 1, and the support plate 18 is driven away from the spiral pipe unit 1 by rotating the drive source 23, so that the sealing cover 19 and the test cover 21 are separated from the spiral pipe unit 1. The tested spiral pipe unit 1 can then be removed for subsequent assembly. The next sheet substrate 2 is bent at the pipe winding mechanism. After the airtightness test of multiple spiral pipe units 1 is completed, they can be connected in sequence by the splicing parts 6 to form an exhaust pipe.

[0045] This embodiment also discloses a method for splicing exhaust ducts. The exhaust duct splicing method uses the aforementioned exhaust duct splicing auxiliary equipment and further includes the following steps: Step 1: Place the sheet substrate 2 into the tube winding mechanism, and use the tube winding mechanism to spirally wind the sheet substrate 2 into a spiral tube unit 1, and use the male buckle 3 and female buckle 4 on the sheet substrate 2 for positioning; Step 2: Next, place the spiral pipe unit 1 on the two clamping seats 16 of the mounting base 15 and clamp it in place. Cut the end of the spiral pipe unit 1 to form a flat port. Step 3: Install pipe clamps 5 on the spiral pipe unit 1, and test the airtightness of the spiral pipe unit 1 using an airtightness testing mechanism; Step 4: Arrange the multiple spiral pipe fitting units 1, which have been cut, installed with pipe clamps 5, and tested for air tightness, along their length. Place two heat shrink sleeves 63 onto the corresponding connectors 61. Then, place the two connectors 61 between adjacent spiral pipe fitting units 1, inserting them into the ports of their respective units. Place the sealing ring 62 between the two connectors 61 and secure them together with bolts and nuts. Next, adjust the position of the heat shrink sleeves 63 so that they cover the outer wall of the corresponding connector 61 and the outer wall of the corresponding spiral pipe fitting unit 1. Then, heat the heat shrink sleeves 63 to tightly wrap around the joint between the connector 61 and the port of the spiral pipe fitting unit 1. Connect adjacent spiral pipe fitting units 1 sequentially according to this step to complete the exhaust pipe assembly.

[0046] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A spiral exhaust duct, characterized in that, include: Spiral tube unit (1), wherein there are multiple spiral tube units (1), and multiple spiral tube units (1) are used to be spliced ​​in sequence to form an exhaust pipe. The spiral tube unit (1) is formed by spirally bending and rolling a sheet substrate (2). The splicing component (6) is used to connect adjacent spiral pipe units (1).

2. The spiral exhaust duct according to claim 1, characterized in that: The sheet substrate (2) has a male buckle (3) on one side and a female buckle (4) on the other side. The female buckle (4) is used to engage with the male buckle (3) during the spiral bending of the sheet substrate (2). The spiral tube unit (1) is fitted with a tube clamp (5).

3. A spiral exhaust duct according to claim 1, characterized in that: The splicing component (6) includes a connector (61), a sealing ring (62), and a heat shrink sleeve (63). There are two connectors (61) arranged opposite each other, and the two connectors (61) correspond one-to-one with the spiral pipe units (1) on both sides. The connector (61) extends into the pipe opening of the corresponding spiral pipe unit (1). The sealing ring (62) is located between the two connectors (61). The two connectors (61) are detachably connected. The heat shrink sleeve (63) corresponds one-to-one with the connector (61). The heat shrink sleeve (63) is used to be heat-shrinked and fitted onto the outer wall of the corresponding connector (61) and the spiral pipe unit (1).

4. An auxiliary device for splicing exhaust ducts, used to assist in splicing the spiral exhaust duct as described in any one of claims 1-3, characterized in that, include: Base (7); A tube winding mechanism is provided on a machine base (7) for spirally bending a sheet substrate (2) into a spiral tube unit (1); A clamping and fixing mechanism is provided on the machine base (7) for clamping and fixing the spiral tube unit (1) formed by bending.

5. The auxiliary equipment for splicing exhaust pipes according to claim 4, characterized in that: The tube winding mechanism includes a support base (8), a support roller (9), a positioning base (10), a positioning roller (11), a support (12), a pressure roller (13), and a feeder (14). The end of the support base (8) away from the clamping and fixing mechanism is set on the machine base (7). The support roller (9) is rotatably mounted on the support base (8) and is used to abut against the inner wall of the sheet substrate (2) when it is bent. Multiple positioning bases (10) are provided, and multiple positioning bases (10) are all set on the machine base (7). The support base (8) is located between multiple positioning bases (10). The positioning roller (11) corresponds one-to-one with the positioning base (10) and is mounted on the corresponding positioning base (10). Multiple positioning rollers (11) are circumferentially spaced along the center of the sheet substrate (2) when it is bent. The positioning rollers (11) are used to roll against the outer wall of the sheet substrate (2) when it is spirally bent. The support (12) is set on the machine base (7). The pressure roller (13) is installed on the support (12) and is used to abut against the sheet substrate (2). The pressure roller (13) and the support roller (9) are located on opposite sides of the sheet substrate (2). The feeder (14) is set on the machine base (7) and is used to drive the sheet substrate (2) to continuously enter towards the support roller (9). The sheet substrate (2) entering from the feeder (14) slides against the pressure roller (13), the support roller (9) and multiple positioning rollers (11) in sequence.

6. The auxiliary equipment for splicing exhaust pipes according to claim 4, characterized in that: The clamping and fixing mechanism includes a mounting base (15) and a support clamping assembly. The mounting base (15) is mounted on the machine base (7) and is located on the discharge side of the tube winding mechanism. The support clamping assembly is mounted on the mounting base (15) and is used to clamp and fix the spiral tube unit (1).

7. The auxiliary device for splicing exhaust pipes according to claim 6, characterized in that: The support clamping assembly includes two clamping seats (16) that are slidably disposed relative to each other. The clamping seats (16) are slidably disposed on the mounting base (15). The clamping seats (16) have an arc surface for fitting against the outer wall of the spiral pipe unit (1). The mounting base (15) is provided with a clamping drive source (17) for driving the two clamping seats (16) to move closer or further apart from each other.

8. The auxiliary equipment for splicing exhaust pipes according to claim 6, characterized in that: The splicing auxiliary equipment also includes an airtightness testing mechanism, which is mounted on the mounting base (15). The airtightness testing mechanism includes a support plate (18), a sealing cover plate (19), a testing cover plate (21), a testing hood (22), and a rotation drive source (23). The support plate (18) is rotatably mounted on opposite sides of the mounting base (15). The sealing cover plate (19) and the testing cover plate (21) are rotatably mounted on the two support plates (18), respectively. The sealing cover plate (19) and the testing cover plate (21) are located at both ends of the spiral pipe unit (1) on the mounting base (15). The sealing cover (19) is used to abut one end of the spiral tube unit (1) on the mounting base (15), the detection cover (21) is used to abut the other end of the spiral tube unit (1) on the mounting base (15), the detection cover (21) is connected to a ventilation pipe (24), the ventilation pipe (24) is used to connect to an external air source, the detection cover (22) is hinged to the mounting base (15), the detection cover (22) is used to determine the airtightness of the spiral tube unit (1) on the mounting base (15), and the rotation drive source (23) is used to drive the two support plates (18) to rotate.

9. The auxiliary equipment for splicing exhaust pipes according to claim 8, characterized in that: The detection cover (22) has a mesh structure and multiple ribbons (25) are provided on the detection cover (22).

10. A method for splicing exhaust ducts, using the exhaust duct splicing auxiliary equipment as described in any one of claims 4-9, characterized in that, It also includes the following steps: The sheet substrate (2) is placed into the tube winding mechanism, and the sheet substrate (2) is spirally wound into a spiral tube unit (1) by the tube winding mechanism. The positioning is achieved by the male buckle (3) and female buckle (4) on the sheet substrate (2). Next, the spiral pipe unit (1) is clamped and fixed by the clamping and fixing mechanism, and the end of the spiral pipe unit (1) is cut to form a flat port; Then, pipe clamps (5) are installed outside the spiral pipe unit (1); Next, multiple spiral pipe units (1) are connected in sequence through splicing parts (6) to complete the assembly of the exhaust pipe.

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