A rolling spraying device for processing thermal insulation pipes

Abstract

This utility model relates to a rolling spraying device for processing insulated pipes in the field of insulated pipe production technology. It includes a spray booth and a trolley. The spray nozzle of the spray gun extends into the spray booth. The trolley includes a vehicle body, a track-walking mechanism, and a rolling lifting mechanism. The track-walking mechanism includes a trolley chassis and two drive axles. Each drive axle has a track wheel fixedly connected to its left and right ends. The two drive axles are connected to a drive motor via a transmission assembly. The rolling lifting mechanism includes a support frame fixedly supported above the trolley chassis and two rolling axles. One end of each rolling axle is coaxially fixed to a lifting roller, and the other end is connected to the rolling motor via a transmission device. This rolling spraying device uses two small trolleys instead of a large tire drive line to roll and transport the pipes. The device structure is relatively simple, the equipment cost is low, the footprint is small, and the energy consumption for start-up and shutdown is relatively lower. It is energy-saving and environmentally friendly, and better suited for small-volume, short-distance pipe spraying operations.

Description

Technical Field

[0001] This utility model belongs to the field of thermal insulation pipe production technology, specifically relating to a rolling spraying device for processing thermal insulation pipes. Background Technology

[0002] Insulated pipes, also known as thermal pipelines, are mainly composed of a working pipe, an insulation layer, and an outer protective layer. The working pipe is mostly made of steel pipe. The insulation layer is generally a polyurethane foam layer sprayed on the outside of the working steel pipe. The outer protective layer is a polyethylene spiral layer wrapped around the polyurethane insulation layer (called plastic-coated steel insulated pipe) or a protective steel pipe sleeved on the outside of the insulation layer (called steel-clad steel insulated pipe). Thermal pipelines are mainly laid in two ways: direct-buried insulated pipelines and overhead insulated pipelines. Regardless of the laying method, the insulated pipelines are prefabricated in the factory and then transported one by one to the construction site for welding and laying. When it is necessary to connect branch pipes from the main pipe during the laying process, pipe joints are also required for connection. Existing prefabricated insulated pipe production lines generally use tire-type pipe transmission lines for pipe spraying and winding. For example, the spraying transmission lines disclosed in patent documents such as CN116872480A and CN119319672A are composed of several sets of rolling tire mechanisms. The structure is very complex, the equipment is large, the cost is high, the area occupied is large, and the cost of starting and stopping each time is also high. It is suitable for the batch continuous production of whole pipes. Moreover, the pipes continuously sprayed and wound need to be cut and separated. Furthermore, the two ends of each rated length of insulated pipe need to be reprocessed and peeled off to expose 15-20cm of the working steel pipe exposed end for subsequent construction and welding. However, for the production of insulated pipe fittings such as pipe joints, especially in the case of emergency preparation of a small number of pipe joints, using a spraying transmission line is somewhat wasteful of resources. Moreover, the pipes sprayed continuously require subsequent cutting, peeling and other processing, which is also quite troublesome. Therefore, there is an urgent need to design a small and convenient pipe spraying device that is more suitable for short-distance spraying of a small number of pipes. Utility Model Content

[0003] In view of the above situation, this utility model provides a rolling spraying device for processing thermal insulation pipes, which has a relatively simple structure and can be better applied to short-distance pipe spraying processing operations.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A rolling spraying device for processing thermal insulation pipes includes a pipe, a trolley assembly, a spray booth, and a spray gun installed on the side wall of the spray booth. The trolley assembly includes two trolleys arranged facing each other in front of and behind the spray booth for lifting and rolling the pipe. The front and rear sides of the spray booth are respectively provided with inlets and outlets for the pipe to enter and exit. The spray nozzle of the spray gun extends into the spray booth and close to the side surface of the pipe for spraying coating material onto the pipe surface. The two trolleys have the same structure, including a body, a track-walking mechanism located at the lower part of the body, and a rolling lifting mechanism located at the upper part of the body; The track-walking mechanism includes a trolley chassis and two drive wheel axles rotatably disposed below the trolley chassis on the front and rear sides. Each of the two drive wheel axles has a walking track wheel fixedly connected to its left and right ends. A walking motor is installed on the trolley chassis, and the two drive wheel axles are synchronously driven and connected to the walking motor through a transmission assembly. The rolling lifting mechanism includes a support frame fixedly supported above the trolley chassis and two rolling wheel axles rotatably and symmetrically disposed on the left and right sides of the support frame. One end of each rolling wheel axle near the pipe is coaxially fixedly connected to a lifting roller, and the other end is synchronously driven and connected to the rolling motor through a transmission device. The rolling motor is fixedly installed in the support frame.

[0005] Furthermore, an electromagnetic heating coil is provided in front of the spray gun, and a pipe passes through the middle of the electromagnetic heating coil to preheat the pipe so that the heat insulation coating material can better adhere to the surface of the working steel pipe. The electromagnetic heating coil is connected to an external power supply.

[0006] Furthermore, a cooling air ring is provided behind the spray gun, and the pipe passes through the middle of the cooling air ring. Several air jets are installed on the inner wall of the cooling air ring for air cooling of the pipe insulation layer and outer protective layer, so as to facilitate the timely cooling and shaping of the polyurethane insulation layer and polyethylene outer protective layer. The cooling air ring is connected to the compressed air pipeline network.

[0007] Furthermore, the coating material is polyurethane insulation foam, and an extrusion head is provided below the pipe between the spray gun and the cooling air ring for wrapping a polyethylene outer protective layer around the polyurethane insulation layer of the pipe. An exhaust port is also provided on the top of the spray booth, and the exhaust port is connected to the exhaust gas treatment system through an exhaust pipe.

[0008] Furthermore, two rails extending in the front-to-back direction are laid on the ground below the traveling wheels to ensure that the two trolleys travel in a straight line on the rails. The rails pass through the bottom of both sides of the spray booth, and flexible soft curtains are suspended on the front and rear entrances and exits of the spray booth.

[0009] Furthermore, the transmission device is a dual-output shaft reducer connected to the two roller shafts, and the two lifting rollers of the same trolley rotate in the same direction, ensuring that the pipe rotates and rolls in the same direction. The two ends of the pipe are respectively rotatably placed above the middle of the two lifting rollers of the two trolleys.

[0010] Furthermore, the transmission assembly includes a drive wheel mounted on the output shaft of the walking motor and a driven wheel fixedly mounted on the two drive wheel shafts. An intermediate transmission shaft is provided between the two drive wheel shafts. An intermediate wheel is fixedly mounted in the middle of the intermediate transmission shaft, and two transmission wheels are fixedly mounted at both ends of the intermediate transmission shaft. The intermediate wheel is connected to the drive wheel by a transmission belt, and the two driven wheels are connected to the two transmission wheels by a transmission belt.

[0011] Furthermore, both transmission belt one and transmission belt two are synchronous belts or transmission chains. Accordingly, when a synchronous belt is used, both the driving pulley and the driven pulley are synchronous belt pulleys; when a transmission chain is used, both the driving pulley and the driven pulley are transmission sprockets. However, regardless of whether a synchronous belt or a transmission chain is used, both transmission belt one and transmission belt two are equipped with adjustable tension pulleys on their sides for tensioning the transmission belts.

[0012] This utility model also includes other components that enable its normal use, all of which are conventional means in the field. In addition, devices or components not limited in this utility model, such as: spray booth, electromagnetic heating coil, polyurethane feeding equipment station, spray gun, polyethylene extruder, extrusion head, cooling air ring, exhaust gas treatment system, etc., all adopt the prior art in the field.

[0013] The beneficial effects of this utility model are as follows: This utility model provides a rolling spraying device for processing insulated pipes, which uses two small trolleys instead of large tire drive lines to roll and transport pipes. The device has a relatively simple structure, low equipment cost, small footprint, and relatively lower energy consumption during start-up and shutdown. It is energy-saving and environmentally friendly, and can better adapt to a small number of short-distance pipe spraying operations. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the rolling spraying device in this utility model; Figure 2 for Figure 1 A front view schematic diagram of the trolley structure along the AA direction; Figure 3 for Figure 1 Schematic diagram of the front structure of the spray booth along the BB direction; Figure 4 for Figure 1 Schematic diagram of the rear structure of the spray booth along the CC direction. Detailed Implementation

[0015] The present invention will now be clearly described with reference to the accompanying drawings and specific embodiments. Any modifications, equivalent substitutions, improvements, etc., made by those skilled in the art based on the embodiments of the present invention without creative effort to obtain all other embodiments should be included within the protection scope of the present invention.

[0016] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "inner," "outer," "center," "vertical," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of 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. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0017] Example 1 like Figure 1-4 As shown, a rolling spraying device for processing thermal insulation pipes includes a pipe 1, a trolley assembly, a spray booth 2, and a spray gun 3 installed on the side wall of the spray booth. The trolley assembly includes two trolleys arranged facing each other in front of and behind the spray booth, which are used to lift and roll the pipe. The front and rear sides of the spray booth are respectively provided with inlets and outlets for the pipe to enter and exit. The spray nozzle of the spray gun extends into the spray booth and close to the side surface of the pipe, for spraying coating material onto the pipe surface.

[0018] Both trolleys have the same structure, including a vehicle body, a track-walking mechanism located at the lower part of the vehicle body, and a rolling lifting mechanism located at the upper part of the vehicle body.

[0019] The track walking mechanism includes a trolley chassis 4 and two drive wheel axles 5 rotatably disposed on the front and rear sides below the trolley chassis. Each of the two drive wheel axles has a walking track wheel 6 fixedly connected to its left and right ends. A walking motor 7 is installed on the trolley chassis. The two drive wheel axles are synchronously connected to the walking motor through a transmission assembly.

[0020] The rolling lifting mechanism includes a support frame 8 fixedly supported above the trolley chassis, and two rolling wheel shafts rotatably and symmetrically arranged on the left and right sides of the support frame. One end of the two rolling wheel shafts near the pipe is coaxially fixedly connected to a lifting roller 9, and the other end is synchronously driven to a rolling motor 10 through a transmission device. The rolling motor is fixedly installed in the support frame.

[0021] Specifically, the transmission assembly includes a drive wheel 11 mounted on the output shaft of the walking motor and a driven wheel 12 fixedly mounted on the two drive wheel shafts. An intermediate transmission shaft 13 is provided between the two drive wheel shafts. An intermediate wheel 14 is fixedly mounted in the middle of the intermediate transmission shaft, and two transmission wheels 15 are fixedly mounted at both ends of the intermediate transmission shaft. The intermediate wheel is connected to the drive wheel by a transmission belt 16, and the two driven wheels are connected to the two transmission wheels by transmission belts 17. That is, the intermediate transmission shaft only serves as a power transmission intermediary.

[0022] Specifically, two rails 18 extending in the front-to-back direction are laid on the ground below the traveling wheels to ensure that the two trolleys travel in a straight line on the rails, which pass through the bottom of both sides of the spray booth; a cable trench is opened under the ground between the two rails, and a tank chain cable trench 19 and a moving cable are laid in the cable trench to provide power for the movement of the two trolleys; flexible soft curtains 20 are suspended on the front and rear entrances and exits of the spray booth, which not only improves the relative airtightness of the spray booth, but also does not obstruct or interfere with the lifting of the pipes by the two trolleys into and out of the spray booth.

[0023] Specifically, the transmission device is a dual-output shaft reducer connected to the two roller shafts, and the two lifting rollers on the same trolley rotate in the same direction, ensuring that the pipe rotates and rolls in the same direction. The two ends of the pipe are rotatably placed above the middle of the two lifting rollers on the two trolleys, and each lifting roller has a knurled surface to increase the rolling friction with the pipe. A rotatable end positioning wheel 21 is also vertically arranged between the two lifting rollers to roll against the end face of the pipe. A rotating shaft is rotatably arranged in the middle of the end positioning wheel, and the upper and lower ends of the rotating shaft are rotatably connected to a vertical connecting frame through bearings. The vertical connecting frame is fixedly connected to the support frame. The distance between the front side of the end positioning wheel and the front end face of the lifting roller is 15-20cm, which is exactly the length of the exposed end of the insulation pipe that needs to be peeled off.

[0024] Specifically, both transmission belt one and transmission belt two are synchronous belts, and correspondingly, both the driving pulley and the driven pulley are synchronous belt pulleys. Adjustable tension pulleys 22 are provided on the sides of both transmission belt one and transmission belt two to ensure that belt slippage or tooth skipping does not occur. The synchronous belts and adjustable tension pulleys are existing technologies and will not be described in detail here.

[0025] Specifically, both the traveling motor and the rolling motor are variable frequency motors. An electrical control cabinet (not shown in the figure) is installed outside the spray booth. Inside the cabinet are a first frequency converter for controlling the two traveling motors and a second frequency converter for controlling the two rolling motors, as well as a PLC controller for controlling the entire rolling spraying device. A control panel is located on the front panel of the cabinet, enabling forward and reverse rotation and speed control of the traveling and rolling motors. The electrical control cabinet and its internal electrical control system are existing technologies and will not be described in detail here.

[0026] Example 2 The only difference from Embodiment 1 is that both the first and second transmission belts are transmission chains, and correspondingly, both the driving wheel and the driven wheel are transmission sprockets.

[0027] The two vehicles also have suspended support eaves 23 fixedly connected to the outer wall of the support frame near the pipe. The two support eaves are located below the two ends of the pipe to prevent the two ends of the pipe from accidentally falling off the lifting rollers.

[0028] Example 3 Based on embodiment 1 or 2, an electromagnetic heating coil 24 is further provided in front of the spray gun. The electromagnetic heating coil is fixedly mounted on the front of the inner side of the spray booth by a heating bracket 31. The pipe passes through the middle of the electromagnetic heating coil to preheat the pipe so that the heat insulation coating material can better adhere to the surface of the working steel pipe. The electromagnetic heating coil is connected to an external power supply through an incoming cable 25.

[0029] Furthermore, a cooling air ring 26 is provided behind the spray gun. The cooling air ring is fixedly mounted on the rear side of the spray booth by a cooling bracket 32. The pipe passes through the middle of the cooling air ring. Several air outlets are opened on the inner wall of the cooling air ring, and each air outlet is equipped with a corresponding air nozzle 27 for air cooling of the pipe insulation layer and outer protective layer, so as to facilitate the timely cooling and shaping of the polyurethane insulation layer and the polyethylene outer protective layer. The cooling air ring is connected to the compressed air network (not shown in the figure) through a compressed air pipe 28.

[0030] Specifically, the coating material is polyurethane insulation foam material, the spray gun is connected to a polyurethane feeding equipment station (not shown in the figure), and an extrusion head 29 is also provided below the pipe between the spray gun and the cooling air ring. The extrusion head is connected to the mold outlet of a polyethylene extruder (not shown in the figure) for wrapping a polyethylene outer protective layer around the polyurethane insulation layer of the pipe. The top of the spray booth is also provided with an exhaust port, which is connected to the exhaust gas treatment system (not shown in the figure) through an exhaust pipe 30.

[0031] The electromagnetic heating coil, polyurethane feeding equipment station, spray gun, polyethylene extruder, extrusion head, cooling air ring, jet nozzle, compressed air pipeline network, exhaust gas treatment system, etc., are all existing technologies and will not be described in detail here.

[0032] The working principle of this utility model is as follows: Before spraying, the pipe to be sprayed is first lifted by a crane and slowly passed through the spray booth and the electromagnetic heating coil and cooling air ring inside. Then, two trolleys are controlled to move under the two ends of the pipe, and the pipe is placed on the lifting rollers of the two trolleys. Then, the rolling motors of the two trolleys are turned on to drive the lifting rollers to rotate synchronously, thereby driving the pipe to start rolling. At the same time, the walking motors of the two trolleys are controlled to drive the two trolleys to lift the pipe while rolling synchronously. Meanwhile, the electromagnetic heating coils are used to heat the steel pipe, and the spray gun sprays polyurethane insulation foam onto the surface of the steel pipe. The polyethylene extruder wraps a polyethylene outer protective layer around the insulation layer, and then the cooling air ring cools and shapes it. Finally, the two trolleys are controlled to carry the pipe out of the spray booth in the opposite direction, and the crane is used to lift the pipe away, thus completing the spraying process of the insulated pipe.

[0033] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A rolling spraying device for processing thermal insulation pipes, comprising pipes, a trolley assembly, a spray booth, and spray guns mounted on the side wall of the spray booth, characterized in that: The trolley assembly includes two trolleys positioned facing each other at the front and rear of the spray booth, used to lift and roll the pipeline. The front and rear sides of the spray booth have inlets and outlets for the pipeline to pass through. The spray gun's nozzle extends into the spray booth and onto the pipeline's surface to spray coating material onto the pipeline. Both trolleys have identical structures, including a vehicle body, a track-walking mechanism located at the lower part of the vehicle body, and a rolling and lifting mechanism located at the upper part of the vehicle body. The track-walking mechanism includes a trolley chassis and a mechanism rotatably mounted on the bottom of the trolley. Two drive wheel axles are located on the front and rear sides below the disc. Each of the two drive wheel axles has a travel track wheel fixedly connected to its left and right ends. A travel motor is installed on the chassis of the trolley. The two drive wheel axles are synchronously driven and connected to the travel motor through a transmission assembly. The rolling lifting mechanism includes a support frame fixedly supported above the chassis of the trolley, and two rolling wheel axles rotatably and symmetrically arranged on the left and right sides of the support frame. One end of each rolling wheel axle near the pipe is coaxially fixedly connected to a lifting roller, and the other end is synchronously driven and connected to the rolling motor through a transmission device. The rolling motor is fixedly installed in the support frame.

2. The rolling spraying device for processing thermal insulation pipes according to claim 1, characterized in that: An electromagnetic heating coil is also provided in front of the spray gun, and a pipe passes through the middle of the electromagnetic heating coil to heat the pipe.

3. The rolling spraying device for processing thermal insulation pipes according to claim 2, characterized in that: A cooling air ring is also provided behind the spray gun, and a pipe passes through the middle of the cooling air ring, which is connected to the compressed air pipeline.

4. The rolling spraying device for processing thermal insulation pipes according to claim 3, characterized in that: The coating material is polyurethane insulation foam, and an extrusion head is also provided below the pipe between the spray gun and the cooling air ring for wrapping a polyethylene outer protective layer around the polyurethane insulation layer of the pipe.

5. The rolling spraying device for processing thermal insulation pipes according to claim 1, characterized in that: Two rails extending in the front-to-back direction are laid on the ground below the traveling wheel. The rails pass through the bottom of both sides of the spray booth. Flexible soft curtains are suspended on the front and rear entrances and exits of the spray booth.

6. The rolling spraying device for processing thermal insulation pipes according to claim 1, characterized in that: The transmission device is a dual-output shaft reducer connected to the two roller shafts, and the two lifting rollers of the same trolley rotate in the same direction. The two ends of the pipe can be rolled on top of the lifting rollers of the two trolleys.

7. The rolling spraying device for processing thermal insulation pipes according to claim 1, characterized in that: The transmission assembly includes a drive wheel mounted on the output shaft of the walking motor and a driven wheel fixedly mounted on the two drive wheel shafts. An intermediate transmission shaft is provided between the two drive wheel shafts. An intermediate wheel is fixedly mounted in the middle of the intermediate transmission shaft, and two transmission wheels are fixedly mounted at both ends of the intermediate transmission shaft. The intermediate wheel is connected to the drive wheel by a transmission belt, and the two driven wheels are connected to the two transmission wheels by a transmission belt.

8. The rolling spraying device for processing thermal insulation pipes according to claim 7, characterized in that: Both transmission belt one and transmission belt two are synchronous belts, and both the driving pulley and the driven pulley are synchronous pulleys.

9. A rolling spraying device for processing thermal insulation pipes according to claim 7, characterized in that: Both the first and second transmission belts are transmission chains, and both the driving pulley and the driven pulley are transmission sprockets.

Images