A powder heating and solidifying device for the inside and outside of a hot-dip plastic steel pipe

Abstract

This invention provides a device for heating and curing internal and external powders of hot-dip plastic-coated steel pipes, including a heating furnace. A conveyor belt is installed through the heating furnace, and multiple evenly distributed support components are installed on both sides of the conveyor belt surface. Each support component includes two connecting blocks and two toothed drive components. The two connecting blocks are fixedly installed on the upper surface of the conveyor belt, and a retainer is fixedly connected to the top of each connecting block. Rollers are rotatably connected inside each retainer, and a gear is provided on the side wall of one of the retainers. This invention supports the pipe through the two rollers, and during the movement of the conveyor belt, the gear and rack contact cause one of the rollers to rotate, thereby driving the pipe to rotate. This improves the uniformity of material melting and flowing on the outer wall of the rotating pipe during the heating and curing process in the heating furnace.

Description

Technical Field

[0001] This utility model belongs to the technical field of hot-dip plastic-coated steel pipes, and in particular relates to a device for heating and curing internal and external powders for hot-dip plastic-coated steel pipes. Background Technology

[0002] Hot-dip plastic-coated steel pipe is a new type of steel-plastic composite pipe formed by uniformly coating a polymer material onto the surface of a steel pipe using a fluidized bed impregnation process, followed by plasticization and curing. It combines the mechanical properties of steel pipe with the chemical corrosion resistance of polymer materials, exhibiting excellent corrosion resistance, wear resistance, antistatic properties, and flame retardancy.

[0003] Existing hot-dip plastic-coated steel pipes require heating and curing after the plastic coating process, necessitating the use of appropriate heating devices. These devices typically consist of a heating furnace and a conveyor belt, with supports on the conveyor belt to place the plastic-coated steel pipes. The pipes are then conveyed into the heating furnace for curing. However, during curing, the plastic coating on the pipe surface melts, causing slight flow. As the pipe moves within the furnace, its position remains constant, causing the surface material to flow downwards, resulting in localized accumulation and affecting flatness. Furthermore, existing devices are not conducive to rotating the pipe to ensure uniform material flow. Summary of the Invention

[0004] In view of this, the present invention aims to propose an internal and external powder heating and curing device for hot-dip plastic-coated steel pipes, so as to solve the technical problem that it is not convenient to drive the pipe to rotate so as to make the material flow uniformly.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] A device for heating and curing internal and external powders of hot-dip plastic-coated steel pipes includes a heating furnace. A conveyor belt is installed through the heating furnace. Multiple evenly distributed bearing components are installed on both sides of the surface of the conveyor belt. Each bearing component includes two connecting blocks and two toothed drive components. The two connecting blocks are fixedly installed on the upper surface of the conveyor belt. A retainer is fixedly connected to the top of each of the two connecting blocks. A roller is rotatably connected inside each of the two retainers. A gear is provided on the side wall of one of the retainers. One side wall of the gear passes through the retainer through a short shaft and is fixedly connected to one end of the roller. The two toothed drive components are respectively installed on the two side walls of the inner cavity of the heating furnace. The toothed drive components are used to drive the gear to rotate.

[0007] Furthermore, the toothed drive assembly includes a rack and a reinforcing rib. The rack is fixedly installed on the inner wall of the heating furnace cavity and meshes with a corresponding gear. The reinforcing rib is fixedly installed at the bottom of the rack and is fixedly connected to the inner wall of the heating furnace.

[0008] Furthermore, it also includes a blower assembly, which includes a high-temperature resistant fan, which is fixedly installed on the top of the heating furnace; an air inlet pipe and an air outlet pipe are respectively connected to both sides of the heating furnace, and the air inlet pipe is connected to the air inlet of the high-temperature resistant fan; one end of the air outlet pipe is connected to the other side wall of the heating furnace, and the other end of the air outlet pipe is connected to the air outlet of the high-temperature resistant fan.

[0009] Furthermore, a groove is provided on the top of the connecting block, and a screw is rotatably installed in the inner cavity of the groove. One end of the screw passes through the connecting block and is fixedly connected to a rotating block. A matching threaded slider is fitted on the outer wall of the screw, and the top of the threaded slider is fixedly connected to the bottom of the corresponding retainer.

[0010] Furthermore, hollow plates are fixed to both sides of the inner cavity of the heating furnace, and multiple evenly distributed holes are opened on the outer wall of the hollow plates. The air inlet pipe and the air outlet pipe both pass through the heating furnace and are respectively connected to the two hollow plates.

[0011] Furthermore, cloth pads are fixedly installed on the upper side of the openings at both ends of the heating furnace.

[0012] Furthermore, partitions are fixed to the lower sides of the openings at both ends of the heating furnace.

[0013] Compared with the prior art, the internal and external powder heating and curing device for hot-dip plastic-coated steel pipes described in this utility model has the following advantages:

[0014] The present invention discloses an internal and external powder heating and curing device for hot-dip plastic-coated steel pipes. The device supports the pipe with two rollers, and during the movement of the conveyor belt, the contact between the gear and the rack causes one of the rollers to rotate, thereby driving the pipe to rotate. This facilitates the uniform flow of the material melting on the outer wall of the rotating pipe during the heating and curing process in the heating furnace, and helps to avoid unevenness caused by local accumulation of material on the pipe surface, thus improving the heating and curing effect.

[0015] The high-temperature fan draws air from one side of the heating furnace and introduces it along the other side of the furnace cavity, creating a flow of hot air within the furnace. This allows the gas to pass through the pipes, improving the contact between the hot air and the inner wall of the pipes, thus enhancing the heating and curing effect.

[0016] The present invention discloses an internal and external powder heating and curing device for hot-dip plastic-coated steel pipes. By rotating the screw, the threaded slider can be moved, thereby adjusting the distance between the two side retainers and the distance between the two rollers, which helps to improve the stability when supporting different pipes. Attached Figure Description

[0017] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0018] Figure 1 This is a schematic diagram of the overall structure of an internal and external powder heating and curing device for a hot-dip plastic-coated steel pipe according to an embodiment of the present invention.

[0019] Figure 2 This is a cross-sectional structural schematic diagram of an internal and external powder heating and curing device for a hot-dip plastic-coated steel pipe according to an embodiment of the present invention;

[0020] Figure 3 This is a side view of the internal and external powder heating and curing device for a hot-dip plastic-coated steel pipe according to an embodiment of the present invention.

[0021] Figure 4 This is a schematic diagram of the rack and gear connection structure of the internal and external powder heating and curing device for a hot-dip plastic-coated steel pipe according to an embodiment of the present invention;

[0022] Figure 5 for Figure 4 Enlarged diagram of part A in the middle;

[0023] Figure 6 This is a schematic diagram of the blower assembly structure of an internal and external powder heating and curing device for hot-dip plastic-coated steel pipe according to an embodiment of the present invention;

[0024] Figure 7 This is a schematic diagram of the separation structure of the connecting block and the retainer of the internal and external powder heating and curing device for a hot-dip plastic-coated steel pipe according to an embodiment of the present invention.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Heating furnace; 11. Conveyor belt; 12. Cloth pad; 13. Baffle plate; 2. Bearing assembly; 21. Connecting block; 22. Cage; 23. Roller; 24. Gear; 25. Rack; 26. Reinforcing rib; 27. Screw; 28. Threaded slider; 3. High-temperature resistant fan; 31. Inlet pipe; 32. Outlet pipe; 33. Hollow plate; 34. Hole. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0028] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] like Figure 1-7 As shown in the figure, as an embodiment, a heating and curing device for the inner and outer powders of a hot-dip plastic-coated steel pipe includes a heating furnace 1. A conveyor belt 11 is installed through the heating furnace 1. Multiple evenly distributed bearing components 2 are installed on both sides of the surface of the conveyor belt 11. The bearing components 2 include two connecting blocks 21, which are fixedly installed on the upper surface of the conveyor belt 11. A roller 23 is rotatably installed in a retainer 22. The two retainers 22 are respectively installed on the top of the two connecting blocks 21. A gear 24 is disposed on one side of one of the retainers 22. One side wall of the gear 24 passes through the retainer 22 through a short shaft and is fixedly connected to one end of the roller 23. Two tooth drive components are respectively installed on the two side walls of the inner cavity of the heating furnace 1. The tooth drive components are used to drive the gear 24 to rotate.

[0032] It should be understood that in actual use, the hot-dip plastic-coated steel pipe is placed on the bearing components 2 on both sides, and the two rollers 23 form support for the pipe ends. When the conveyor belt 11 drives the pipe into the heating furnace 1 for heating and curing, the gear 24 will be driven by the gear drive component when it moves to the gear drive component, causing the gear 24 to rotate. This will drive one of the rollers 23 to rotate, and the roller 23 will drive the pipe to rotate. As a result, when the material melts during the heating and curing process, the molten material can flow along the outer wall of the rotating pipe, which helps to improve the uniformity of the flow and thus improve the heating and curing effect.

[0033] It should be noted that, in order to prevent slippage when the roller 23 drives the pipe to rotate, anti-slip textures can be made on the outer wall of the roller 23 to increase friction. This is a standard technical point and has not been elaborated in the text or the figure.

[0034] Furthermore, a cloth pad 12 is fixedly installed on the upper side of the openings at both ends of the heating furnace 1, and the outer walls of the cloth pad 12 are provided with forks on both sides. The cloth pad 12 can form a certain shield, which helps to reduce the temperature loss of the heating furnace 1. In addition, the cloth pad 12 is soft and can deform when the pipe enters, so that the cloth pad 12 can be bent at the inside of the fork, which helps to avoid causing spatial obstacles to the pipe entry.

[0035] Furthermore, baffles 13 are fixed to the lower sides of the openings at both ends of the heating furnace 1. The baffles 13 are designed to further reduce heat loss.

[0036] like Figure 1 , 2 As shown in Figures 4 and 5, in one embodiment, the tooth drive assembly includes a rack 25, which is fixedly installed on the inner wall of the heating furnace 1. The rack 25 meshes with the corresponding gear 24. The reinforcing rib 26 is fixedly installed on the bottom of the rack 25 and is fixedly connected to the inner wall of the heating furnace 1.

[0037] It should be understood that the use of reinforcing ribs 26 to support rack 25 results in high stability, and when gear 24 moves to rack 25, rack 25 can drive gear 24 to rotate.

[0038] like Figure 1 , 3 As shown in Figure 6, as an embodiment, it also includes a blower assembly, which includes a high-temperature resistant fan 3. The high-temperature resistant fan 3 is fixedly installed on the top of the heating furnace 1. One end of the air inlet pipe 31 is connected to one side wall of the heating furnace 1, and the other end of the air inlet pipe 31 is connected to the air inlet of the high-temperature resistant fan 3. One end of the air outlet pipe 32 is connected to the other side wall of the heating furnace 1, and the other end of the air outlet pipe 32 is connected to the air outlet of the high-temperature resistant fan 3.

[0039] It should be understood that by drawing air from one side of the heating furnace 1 through the high-temperature fan 3 and then introducing it along the other side of the inner cavity of the heating furnace 1, the hot air is made to flow in the heating furnace 1, so that the gas can pass through the direction of the pipe, which is conducive to the contact effect between the hot air and the inner wall of the pipe, thereby further improving the heating and curing effect.

[0040] Hollow plates 33 are fixed on both sides of the inner cavity of the heating furnace 1. Multiple evenly distributed holes 34 are opened on the outer wall of the hollow plates 33. The air inlet pipe 31 and the air outlet pipe 32 both pass through the heating furnace 1 and are connected to the two hollow plates 33 respectively.

[0041] It should be understood that by using the holes 34 on the two hollow plates 33 for air distribution and extraction, the gas flows more evenly in the heating furnace 1, which is conducive to increasing the flow area, thereby increasing the number of pipes passing through, and thus extending the time that a single pipe acts on the flowing hot air area, which is conducive to further improving the hot air curing effect.

[0042] like Figure 1 , 6 As shown in the figure, in one embodiment, the top of the connecting block 21 is provided with a sliding groove, and a screw 27 is rotatably installed in the inner cavity of the sliding groove. One end of the screw 27 passes through the connecting block 21 and is fixedly connected to a rotating block. The outer wall of the screw 27 is fitted with a matching threaded slider 28, and the top of the threaded slider 28 is fixedly connected to the bottom of the corresponding retainer 22.

[0043] It should be understood that rotating the screw 27 can drive the threaded slider 28 to move, thereby adjusting the distance between the two retainers 22 and the distance between the two rollers 23, which helps to improve the stability when supporting different pipes.

[0044] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A device for heating and curing internal and external powders of hot-dip plastic-coated steel pipes, comprising a heating furnace (1), wherein a conveyor belt (11) is installed through the heating furnace (1), and multiple evenly distributed bearing components (2) are installed on both sides of the surface of the conveyor belt (11), characterized in that: The bearing assembly (2) includes two connecting blocks (21) and two tooth drive assemblies. The two connecting blocks (21) are fixedly installed on the upper surface of the conveyor belt (11). A retainer (22) is fixedly connected to the top of each of the two connecting blocks (21). A roller (23) is rotatably connected inside each of the two retainers (22). A gear (24) is provided on the side wall of one of the retainers (22). One side wall of the gear (24) passes through the retainer (22) through a short shaft and is fixedly connected to one end of the roller (23). The two tooth drive assemblies are respectively installed on the two side walls of the inner cavity of the heating furnace (1). The tooth drive assemblies are used to drive the gear (24) to rotate.

2. The internal and external powder heating and curing device for hot-dip plastic-coated steel pipe according to claim 1, characterized in that: The tooth drive assembly includes a rack (25) and a reinforcing rib (26). The rack (25) is fixedly installed on the inner wall of the heating furnace (1) and meshes with the corresponding gear (24). The reinforcing rib (26) is fixedly installed at the bottom of the rack (25) and is fixedly connected to the inner wall of the heating furnace (1).

3. The internal and external powder heating and curing device for hot-dip plastic-coated steel pipe according to claim 2, characterized in that: It also includes a blower assembly, which includes a high-temperature resistant fan (3) fixedly installed on the top of the heating furnace (1); the heating furnace (1) is connected to an air inlet pipe (31) and an air outlet pipe (32) on both sides respectively, the air inlet pipe (31) is connected to the air inlet of the high-temperature resistant fan (3); one end of the air outlet pipe (32) is connected to the other side wall of the heating furnace (1), and the other end of the air outlet pipe (32) is connected to the air outlet of the high-temperature resistant fan (3).

4. The internal and external powder heating and curing device for hot-dip plastic-coated steel pipe according to claim 3, characterized in that: The top of the connecting block (21) is provided with a sliding groove, and a screw (27) is rotatably installed in the inner cavity of the sliding groove. One end of the screw (27) passes through the connecting block (21) and is fixedly connected to a rotating block. The outer wall of the screw (27) is fitted with a matching threaded slider (28), and the top of the threaded slider (28) is fixedly connected to the bottom of the corresponding retainer (22).

5. The internal and external powder heating and curing device for hot-dip plastic-coated steel pipe according to claim 4, characterized in that: Hollow plates (33) are fixed on both sides of the inner cavity of the heating furnace (1). Multiple evenly distributed holes (34) are opened on the outer wall of the hollow plate (33). The air inlet pipe (31) and the air outlet pipe (32) both pass through the heating furnace (1) and are respectively connected to the two hollow plates (33).

6. The internal and external powder heating and curing device for hot-dip plastic-coated steel pipe according to claim 5, characterized in that: Cloth pads (12) are fixedly installed on the upper side of the openings at both ends of the heating furnace (1).

7. The internal and external powder heating and curing device for hot-dip plastic-coated steel pipe according to claim 6, characterized in that: The heating furnace (1) has partitions (13) fixed on the lower side of the openings at both ends.

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