Drying device for thermal insulation pipe spraying and winding system
By designing a drying device for the insulation tube spray winding system, the high-temperature airflow and rotary conveying mechanism are used to solve the bulging problem caused by the evaporation of polyurethane foam, and the efficient drying and winding process of the insulation tube are achieved smoothly.
Patent Information
- Application Number
- CN202422457198.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-11
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-10-11
AI Technical Summary
During the production process of rigid polyurethane sprayed polyethylene wrapped prefabricated direct buried insulation pipes, the rapid evaporation of moisture on the surface of polyurethane foam under high humidity environments leads to bulging, affecting the quality of the insulation pipes.
A drying device for spraying and winding system of insulation pipes is designed. Through the combination of drying mechanism and pipe fitting conveying mechanism, the insulation pipe is dried using high-temperature airflow to prevent moisture from evaporating, including drying channels, heaters, exhaust pipes and roller components, so as to realize the rotary conveying and efficient drying of the insulation pipe.
It effectively avoids the bulging phenomenon caused by water vapor evaporation during the high-temperature winding process, and improves the winding quality and production efficiency of the insulation pipe.
Smart Images
Figure CN223069862U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pipeline engineering, and particularly relates to a drying device for a thermal insulation pipe spraying and winding system. Background Art
[0002] In the process of producing rigid polyurethane sprayed and polyethylene wound prefabricated directly buried thermal insulation pipes, a high-pressure spraying machine is usually used to evenly spray polyurethane foam on the surface of a stainless steel pipe (a steel pipe after rust removal) or a cast iron pipe to form a thermal insulation layer, and then an outer protective layer of the thermal insulation layer is made by extruding and forming a film of polyethylene plastic on the surface of the polyurethane foam in a winding manner (at a high temperature of 160 - 220 °C). However, there are some problems with this process: when the moisture content in the air is high (≥60%), water vapor is likely to form on the surface of the foam, which may cause the water in the thermal insulation pipe to rapidly evaporate into water vapor during the high-temperature polyethylene winding process, and then cause the phenomenon of bulging of the polyethylene layer. Content of the Utility Model
[0003] The technical problem to be solved by the utility model is to provide a drying device for a thermal insulation pipe spraying and winding system, so as to evaporate the moisture in the polyurethane foam before the process of winding high-temperature polyethylene, thereby avoiding the bulging phenomenon.
[0004] In order to solve the above problems, the technical solution adopted by the utility model is as follows:
[0005] A drying device for a thermal insulation pipe spraying and winding system, which comprises:
[0006] A drying mechanism, on which a drying channel is opened, an exhaust pipe is arranged at the top of the drying channel, an air inlet hole is opened at the bottom of the drying channel, the air inlet hole is connected with a heater, and the heater conveys high-temperature air flow into the drying channel through the air inlet hole to dry the thermal insulation pipe;
[0007] Two pipe component conveying mechanisms are respectively arranged on both sides of the drying mechanism. The pipe component conveying mechanism comprises two groups of pipe component conveying assemblies arranged side by side. The pipe component conveying assembly comprises a support box and a plurality of roller assemblies spaced on the support box. The thermal insulation pipe is placed on the roller assemblies of the two pipe component conveying assemblies. The rollers of the roller assemblies abut against the thermal insulation pipe. An included angle is arranged between the rollers and the thermal insulation pipe in the horizontal projection, so that when the synchronous rollers of the two pipe component conveying assemblies rotate, the thermal insulation pipe is driven to rotate and convey.
[0008] As an implementation manner of the present utility model, the drying mechanism includes a drying box body and drying pipes arranged inside the drying box body. Pipe through holes corresponding to the drying pipes are formed on both sides of the drying box body. The pipe through holes are communicated with the cavities of the drying pipes to form the drying channels. An exhaust pipe is arranged at the top of the drying pipe. A containing bin is arranged between the bottom plate of the drying pipe and the drying box body. An air inlet hole is formed at the bottom of the drying pipe. The containing bin is communicated with the drying pipe through the air inlet hole. The heater is arranged inside the containing bin.
[0009] As an implementation manner of the present utility model, the heater includes an open heating bin, a reducing pipe arranged at one end of the heating bin, and an air inlet pipe connected to one end of the reducing pipe;
[0010] The heating bin is arranged inside the containing bin, and its opening direction faces the air inlet hole;
[0011] The air inlet pipe protrudes from one side of the drying box body, and a pipe blower is arranged inside it for blowing air into the heating bin;
[0012] A heating pipe is arranged inside the heating bin for heating the blown air.
[0013] As an implementation manner of the present utility model, a connecting flange is arranged at one end of the heating bin close to the reducing pipe. A front side mounting hole corresponding to the heating bin is formed on the front side of the box body of the drying box body. After the heating bin is installed into the containing bin through the front side mounting hole, the connecting flange and the front side of the box body are fixedly connected through a bolt assembly.
[0014] As an implementation manner of the present utility model, the outer side of the drying pipe is connected to the inner side of the drying box body through support ribs, and a heat insulation material is filled between the drying pipe and the drying box body.
[0015] As an implementation manner of the present utility model, the diameter of the pipe through hole is smaller than the inner diameter of the drying pipe and larger than the outer diameter of the heat insulation pipe.
[0016] As an implementation manner of the present utility model, the upper end of the exhaust pipe is flange-connected to an exhaust pipe for collecting water vapor generated during the drying process.
[0017] As an implementation manner of the present utility model, the roller assembly includes a roller support seat. The roller is rotatably arranged on the roller support seat. A roller driving motor is installed on one side of the roller support seat. The output shaft of the roller driving motor is connected to the rotating shaft of the roller for driving the roller to rotate.
[0018] The beneficial effects produced by adopting the above technical solutions are as follows:
[0019] Through the drying mechanism arranged between the conveying assembly lines, the present application realizes the drying operation of the insulated pipes after spraying polyurethane foam, so that the insulated pipes entering the polyethylene winding process will not bulge due to water vapor evaporation after high-temperature winding.
[0020] The conveying assembly line of the present application adopts a pipe fitting conveying mechanism, which includes two pipe fitting conveying components arranged side by side. The rollers of the pipe fitting conveying components abut against the insulated pipe and form an angle in the horizontal projection, so that the rollers drive the insulated pipe to rotate and feed along the conveying direction when rotating, thereby ensuring that the insulated pipe rotates and dries in the drying mechanism, improving the drying quality while ensuring the smooth conveying of the insulated pipe.
[0021] An exhaust duct connected to the exhaust pipe line is arranged at the top of the drying mechanism of the present application, and the hot air with water vapor generated during the drying process can be recovered and condensed.
[0022] A heater is arranged at the bottom of the drying mechanism of the present application, and the heater can blow out high-temperature air flow to fully dry the insulated pipe. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 is a schematic structural diagram of this embodiment.
[0024] Figure 2 is a schematic structural diagram of the pipe fitting conveying component of this embodiment.
[0025] Figure 3 is a schematic structural diagram of the drying mechanism and the insulated pipe of this embodiment.
[0026] Figure 4 is Figure 3 a schematic structural diagram from another angle.
[0027] Figure 5 is a schematic internal structural diagram of the drying mechanism of this embodiment.
[0028] Figure 6 is a schematic separated structural diagram of the heater and the drying mechanism of this embodiment.
[0029] Figure 7 is a schematic structural diagram of the heater of this embodiment.
[0030] Wherein: 100 insulated pipe;
[0031] 200 pipe fitting conveying mechanism; 201 support box; 202 mounting plate; 203 roller assembly; 204 first connecting rod; 205 second connecting rod; 206 roller driving motor; 207 connecting rod driving motor; 208 connecting pin.
[0032] 300 Drying mechanism; 301 Drying box; 302 Front side of the box; 303 Rear side of the box; 304 Drying pipe; 305 Exhaust pipe; 306 Accommodation bin; 307 Air inlet hole;
[0033] 400 Heater; 401 Heating chamber; 402 Connecting flange; 403 Reducing pipe; 404 Intake pipe; 405 Heating pipe. Detailed implementation manners
[0034] To make the objectives, technical solutions and advantages of the present utility model clearer, the following describes the utility model clearly and completely in conjunction with specific embodiments.
[0035] As Figures 1 to 7 shown, a drying device for a thermal insulation pipe spraying and winding system includes:
[0036] A drying mechanism 300, on which a drying channel is provided. An exhaust pipe 305 is connected to the top of the drying channel. An air inlet hole 307 is provided at the bottom of the drying channel. The air inlet hole 307 is connected to a heater 400. The heater 400 conveys high-temperature air flow into the drying channel through the air inlet hole 307 to dry the thermal insulation pipe 100. The upper end of the exhaust pipe 305 is flange-connected to an exhaust pipe line for collecting water vapor generated during the drying process;
[0037] Two pipe component conveying mechanisms 200 are respectively arranged on both sides of the drying mechanism 300. The pipe component conveying mechanism 200 includes two groups of pipe component conveying assemblies arranged side by side. The pipe component conveying assembly includes a support box 201 and a plurality of roller assemblies 203 spaced apart on the support box 201. The thermal insulation pipe 100 is placed on the roller assemblies 203 of the two pipe component conveying assemblies. The rollers of the roller assemblies 203 abut against the thermal insulation pipe 100. An included angle is provided between the rollers and the thermal insulation pipe 100 in the horizontal projection, so that when the synchronous rollers of the two pipe component conveying assemblies rotate, the thermal insulation pipe 100 is driven to rotate and convey. See Figure 1 , the pipe component conveying mechanism 200 downstream in the conveying direction of this embodiment corresponds to the polyethylene winding system, so that the thermal insulation pipe 100 after drying can be directly subjected to the winding process, reducing the handling process and improving the efficiency.
[0038] See Figure 3 and Figure 4, the drying mechanism 300 includes a drying box body 301 and a drying pipe 304 arranged inside the drying box body 301. Pipe through-holes are formed on both sides of the drying box body 301 corresponding to the drying pipe 304. The pipe through-holes communicate with the cavity of the drying pipe 304 to form the drying channel. An exhaust pipe 305 is arranged at the top of the drying pipe 304. A storage bin 306 is arranged between the bottom plate of the drying pipe 304 and the drying box body 301. An air inlet hole 307 is formed at the bottom of the drying pipe 304. The storage bin 306 communicates with the drying pipe 304 through the air inlet hole 307. The heater 400 is arranged inside the storage bin 306.
[0039] See Figures 5 to 7 , the heater 400 includes an open-shaped heating bin 401, a reducing pipe 403 arranged at one end of the heating bin 401, and an air inlet pipe 404 connected to one end of the reducing pipe 403; the heating bin 401 is arranged inside the storage bin 306, and its opening direction faces the air inlet hole 307; the air inlet pipe 404 protrudes from one side of the drying box body 301, and a pipeline fan is arranged inside it for blowing air into the heating bin 401; heating pipes 405 are arranged inside the heating bin 401 for heating the blown air.
[0040] A connecting flange 402 is arranged at one end of the heating bin 401 close to the reducing pipe 403. A front-side mounting hole is formed on the front side 302 of the box body of the drying box body 301 corresponding to the heating bin 401. See Figure 4 , the rear side 303 of the box body in this embodiment seals the storage bin 306. After the heating bin 401 is installed into the storage bin 306 through the front-side mounting hole, the connecting flange 402 and the front side 302 of the box body are fixedly connected by a bolt assembly.
[0041] See Figure 5 and Figure 6 , the outer side of the drying pipe 304 is connected to the inner side of the drying box body 301 through support ribs, and heat-insulating materials, such as heat-insulating cotton, are filled between the drying pipe 304 and the drying box body 301.
[0042] See Figure 5 The diameter of the pipe through-hole is smaller than the inner diameter of the drying pipe 304 and larger than the outer diameter of the heat-insulating pipe 100, which is used to reduce the overflow of hot air and increase the drying effect.
[0043] In this embodiment, the heating tube 405 in the heating chamber 400, the duct fan disposed in the exhaust duct, and the duct fan disposed in the intake pipe 404 are all connected to the controller. A temperature sensor and a pressure sensor are disposed on the inner wall of the drying tube 304. The temperature sensor and the pressure sensor are connected to the controller. The temperature of the heating tube 405, the air intake speed of the intake pipe 404, and the air extraction speed of the exhaust duct can be adjusted according to the data transmitted by the temperature sensor and the pressure sensor.
[0044] Preferably, the length of the drying box body 301 of this example in the direction perpendicular to the conveying direction is 1 meter, the length in the conveying direction is 2 meters, and the height is 2 meters. The power of the heater 4 is 10 kW. The temperature inside the drying tube 304 is controlled between 50 °C and 80 °C. The wind speed generated by the duct fan in the intake pipe 404 is 2 m / s, and the air volume is 10 cubic meters per minute.
[0045] See Figure 2 . The roller assembly 203 includes a roller support seat. The roller is rotatably disposed on the roller support seat. A roller drive motor 206 is installed on one side of the roller support seat. The output shaft of the roller drive motor 206 is connected to the rotation shaft of the roller for driving the roller to rotate.
[0046] See Figure 2 , an installation plate 202 is disposed on the support box 201. The middle part of the roller support seat is hingedly connected to the installation plate 202. A connecting pin 208 is disposed at one end of the roller support seat. The connecting pins 208 of two adjacent roller assemblies 203 are connected by a first connecting rod 204. The end of the first connecting rod 204 is hingedly connected to the connecting pin 208.
[0047] A connecting rod drive motor 207 is disposed on the installation plate 202. A drive roller is disposed on the output shaft of the connecting rod drive motor 207. The drive roller is connected to the connecting pin 208 of the adjacent roller assembly 203 through a second connecting rod 205. One end of the second connecting rod 205 is hingedly connected to the drive roller, and the other end is hingedly connected to the connecting pin 208. The connecting rod drive motor 207 drives the drive roller to rotate, thereby driving the second connecting rod 205 to pull or push the adjacent connecting pin 208 to adjust the angle between the rollers of several roller assemblies 203 and the heat preservation pipe 100 in the horizontal projection, and changing the conveying speed of the heat preservation pipe 100. Preferably, the installation plate 202 can be moved and adjusted in the direction perpendicular to the conveying direction to adapt to heat preservation pipes 100 with different diameters.
[0048] Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims
1. A drying device for an insulating pipe spraying and winding system, characterized in that, It includes: A drying mechanism (300) is provided with a drying channel. An exhaust pipe (305) is arranged at the top of the drying channel. An air inlet hole (307) is opened at the bottom of the drying channel. The air inlet hole (307) is connected to a heater (400). The heater (400) conveys high-temperature air into the drying channel through the air inlet hole (307) to dry the heat preservation pipe (100). Two pipe conveying mechanisms (200) are respectively arranged on both sides of the drying mechanism (300). The pipe conveying mechanism (200) includes two groups of pipe conveying components arranged side by side. The pipe conveying component includes a support box (201) and a plurality of roller components (203) spaced apart on the support box (201). The heat preservation pipe (100) is placed on the roller components (203) of the two pipe conveying components. The rollers of the roller components (203) abut against the heat preservation pipe (100). An included angle is provided between the rollers and the heat preservation pipe (100) in the horizontal projection, so that when the synchronous rollers of the two pipe conveying components rotate, the heat preservation pipe (100) is driven to rotate and convey.
2. The drying device for the insulation pipe spraying and winding system according to claim 1, characterized in that, The drying mechanism (300) includes a drying box body (301) and a drying pipe (304) arranged in the drying box body (301). Pipe through holes corresponding to the drying pipe (304) are opened on both sides of the drying box body (301). The pipe through holes are communicated with the cavity of the drying pipe (304) to form the drying channel. The exhaust pipe (305) is arranged at the top of the drying pipe (304). A storage bin (306) is arranged between the drying pipe (304) and the bottom plate of the drying box body (301). The air inlet hole (307) is opened at the bottom of the drying pipe (304). The storage bin (306) is communicated with the drying pipe (304) through the air inlet hole (307). The heater (400) is arranged in the storage bin (306).
3. The drying device for the thermal insulation pipe spraying and winding system according to claim 2, characterized in that, The heater (400) includes an open heating bin (401), a reducing pipe (403) arranged at one end of the heating bin (401), and an air inlet pipe (404) connected to one end of the reducing pipe (403). The heating bin (401) is arranged in the storage bin (306), and its opening direction faces the air inlet hole (307). The air inlet pipe (404) protrudes from one side of the drying box body (301), and a pipeline blower is arranged inside it to blow air into the heating bin (401). A heating pipe (405) is arranged in the heating bin (401) to heat the blown air.
4. A drying device for a thermal insulation pipe spraying and winding system according to claim 3, characterized in that, A connecting flange (402) is arranged at one end of the heating bin (401) close to the reducing pipe (403). A front side mounting hole corresponding to the heating bin (401) is opened on the front side (302) of the box body of the drying box body (301). After the heating bin (401) is installed into the storage bin (306) through the front side mounting hole, the connecting flange (402) and the front side (302) of the box body are fixedly connected by a bolt assembly.
5. A drying device for a thermal insulation pipe spraying and winding system according to claim 2, characterized in that, The outer side of the drying pipe (304) is connected to the inner side of the drying box body (301) through support ribs, and a heat-insulating material is filled between the drying pipe (304) and the drying box body (301).
6. A drying device for a thermal insulation pipe spraying and winding system according to claim 2, characterized in that, The diameter of the pipe fitting through-hole is smaller than the inner diameter of the drying pipe (304) and larger than the outer diameter of the heat-insulating pipe (100).
7. A drying device for a heat-insulating pipe spraying and winding system according to claim 2, characterized in that, The upper end of the exhaust pipe (305) is flange-connected to the exhaust pipe line and is used for collecting the water vapor generated during the drying process.
8. The drying device for the thermal insulation pipe spraying and winding system according to claim 1, characterized in that, The roller assembly (203) includes a roller support seat. The roller is rotatably arranged on the roller support seat. A roller driving motor (206) is installed on one side of the roller support seat, and the output shaft of the roller driving motor (206) is connected to the rotation shaft of the roller for driving the roller to rotate.