An integrated mechanical device for producing polyethylene-sheathed rigid polyurethane insulation pipes

Abstract

The present invention discloses an integrated mechanical device for producing polyethylene outer sheathed rigid polyurethane insulation pipes, which belongs to the technical field of insulation pipe production. It aims at solving the problems of inconvenience in rapid integrated production operations and the need for multiple hoisting and moving, which not only increases labor costs but also poses production safety hazards. The device comprises an outer sheathed pipe extruder main body, a water circulation cooling device, a cutting device, a support bracket, a medium frequency heating coil and a pipe threading machine, wherein a mobile processing mechanism is arranged below the pipe threading machine. The present invention uses the mobile processing mechanism to align the pipe threading machine with the outer sheathed pipe extruder main body, so that the processed outer sheathed pipe can be conveniently threaded through the pipe threading machine, and the mobile processing mechanism provides two working stations thereon, which cooperate with the provided foaming platform to realize the pouring of the insulation layer on the pipe after the threading is completed. At the same time, the double-station arrangement can greatly improve its processing and production efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of thermal insulation pipe production, and in particular relates to an integrated mechanical device for producing polyethylene-sheathed rigid polyurethane thermal insulation pipes. Background Art

[0002] Insulated pipe, short for insulated pipe, is used for conveying liquids, gases, and other media. It is used for thermal insulation in pipelines in the petroleum, chemical, aerospace, hot spring, military, central heating, central air conditioning, and municipal engineering sectors. The polyurethane rigid foam insulation layer is tightly bonded to the outer steel pipe, isolating it from air and water, providing excellent corrosion protection. Furthermore, its foam cells are closed, minimizing water absorption. Both the high-density polyethylene (HDPE) and fiberglass (FRP) outer shells offer excellent corrosion resistance, insulation, and mechanical properties. Consequently, the outer surface of the working steel pipe is less susceptible to erosion by air and water.

[0003] In the existing polyurethane insulation pipe production process, the molten polyethylene resin is first rotated through the screw of the extruder and extruded out by the mold in the barrel of the extruder. The extruded polyethylene pipe needs to be cooled to make it quickly solidify to form an outer protective pipe, and the outer protective pipe of the required length is cut by a cutting device, and it is hoisted and moved to the position where the pipe needs to be threaded. Then, the working steel pipe is placed on the pipe threading machine and the pipe threading operation is carried out in conjunction with the outer protective pipe. After the pipe threading is completed, it is hoisted and moved to the foaming platform, and the prepared raw materials are injected into the annular space between the working steel pipe and the outer protective pipe through the high-pressure foaming machine. After completion, the qualified insulation pipe is packaged and stored after quality inspection. In the above work process, the pipe needs to be hoisted and transported many times, which greatly increases the difficulty of the work and requires multiple staff to operate, which increases labor costs. At the same time, during the hoisting and transportation process, there are great safety hazards when the pipe moves in the air, and it is not convenient to complete various processing operations quickly, which reduces work efficiency.

[0004] Therefore, there is a need for an integrated mechanical device for the production of polyethylene-sheathed rigid polyurethane insulated pipes to solve the problems in the prior art of being inconvenient for rapid integrated production operations and requiring multiple lifting and moving operations, which not only increases labor costs but also poses production safety risks. Summary of the Invention

[0005] The object of the present invention is to provide an integrated mechanical device for producing polyethylene-sheathed rigid polyurethane insulated pipes, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an integrated mechanical device for the production of polyethylene outer sheathed rigid polyurethane insulation pipes, comprising an outer sheathed pipe extruder body, a water circulation cooling device, a cutting device, a support bracket, a medium frequency heating coil and a pipe threading machine, wherein the water circulation cooling device, the cutting device, the support bracket and the medium frequency heating coil are sequentially arranged on the left side of the outer sheathed pipe extruder body, and the processed outer sheathed pipe is supported and placed by the support bracket, a mobile processing mechanism is provided under the pipe threading machine, and the pipe threading machine is arranged on the left side of the medium frequency heating coil through the mobile processing mechanism, a foaming platform is provided on the front and rear sides of the mobile processing mechanism, and screw lifts are provided on the left and right sides of the foaming platform, and the foaming platform is lifted and lowered by the screw lift, and a controller is provided on the left side of the foaming platform, and the overall operation of the device is controlled by the controller.

[0007] The foaming platform includes a mounting seat, a blocking device, a limit frame and a connecting rod. The mounting seat is fixedly connected to the left and right sides of the limit frame through the connecting rod. The mounting seat is connected to the screw elevator and is lifted and lowered by the screw elevator. The blocking device is fixedly mounted on both sides of the limit frame through the mounting seat. Synchronous limit mechanisms are provided on the left and right sides of the limit frame for limiting and adjusting the inside of the limit frame. Clamping limit mechanisms are provided on the front and rear sides of the limit frame.

[0008] The mobile processing mechanism includes a fixed frame and a linear guide rail. The linear guide rail is fixedly connected to the fixed frame and is arranged below the limit frame. A slider is slidably arranged on the linear guide rail. The slider is fixedly connected to the bottom of the pipe threading machine. The linear guide rail is electrically connected to the controller.

[0009] The synchronous limit mechanism includes an annular frame, the annular frame is fixedly connected to the outer side of the limit frame and is connected to the connecting rod, the upper part of the annular frame is fixedly connected to a support plate, the front surface of the support plate is fixedly installed with a motor, the output end of the motor is fixedly connected to a worm gear, and the worm gear is rotatably mounted on the upper part of the annular frame through the support plate, and the worm gear is provided with a through-opening corresponding to the upper part of the annular frame. A rotating block is provided for rotation inside the annular frame, and a tooth groove is provided on the upper part of the rotating block for meshing with the worm gear. The rotating block is provided with an adjusting slot through which a limiting rod is limited and slidably provided in the adjusting slot, and the limiting rod is fixedly connected to the support rod at one end inside the motor,

[0010] It is further worth mentioning that two pipe threading machines are arranged on the upper part of the linear guide rail through a slider, and the two pipe threading machines are arranged at intervals in front and behind and are respectively matched with the medium frequency heating coil and the foaming platform.

[0011] As a preferred embodiment, two annular frames are provided on the limiting frame and are symmetrically arranged on the left and right. The annular frames are arranged in a circular ring shape and are through in the middle. The rotating block matches the annular frame and is limitedly rotated inside the annular frame.

[0012] As a preferred embodiment, three adjusting grooves are provided on the rotating block, the three adjusting grooves are provided on the rotating block at the same intervals, and the adjusting grooves are provided in an arc-shaped groove.

[0013] As a preferred embodiment, three guide rods are provided through matching adjustment grooves of the limiting rod and the supporting rod, and the central axes of the three guide rods are arranged to coincide with the center of the annular frame.

[0014] As a preferred embodiment, the clamping limit mechanism includes a mounting plate, the mounting plate is fixedly connected to the limit frame, a pull rod is slidably provided on the mounting plate, the pull rod is fixedly connected to the limit block at one end inside the limit frame, a spring is sleeved on the outside of the pull rod and is arranged between the limit block and the mounting plate, the limit block is provided with a matching groove on one side inside the limit frame, a fixed seat is rotatably arranged in the matching groove, the left and right ends of the fixed seat are fixedly connected to a connecting shaft, a connecting seat is rotatably connected to the connecting shaft, the connecting seat is fixedly connected to the inner side of the limit frame, the fixed seat is rotatably set on the connecting seat through the connecting shaft, the limiting plate is fixedly connected to the fixed seat, a handle is fixedly connected to the bottom outside the limit plate, and a convex strip is provided on the corresponding matching groove on the fixed seat.

[0015] As a preferred embodiment, a limiting groove matching the convex strip is provided on the inner surface of the matching groove, which is used to limit the rotation of the fixing seat.

[0016] Compared with the prior art, the integrated mechanical device for producing polyethylene-sheathed rigid polyurethane insulation pipes provided by the present invention has at least the following beneficial effects:

[0017] (1) Through the mobile processing mechanism, the pipe threading machine and the outer protective pipe extruder body are installed in alignment, so that the outer protective pipe that has been processed can be easily threaded through the pipe threading machine, and the mobile processing mechanism is provided with two working positions, which, in conjunction with the foaming platform, can realize the pouring of the insulation layer of the pipe that has been threaded. At the same time, through the setting of the double working positions, the processing and production efficiency can be greatly improved. The overall integrated production capacity of the device is relatively strong, and the lifting work of pipe threading and foaming pouring is reduced during the processing of the pipeline, which reduces the labor cost and increases the safety of the pipeline transportation process on the basis of reducing its production cost.

[0018] (2) By setting up the synchronous limiting mechanism and the clamping limiting mechanism on the foaming platform, the pipe can be clamped and limited quickly and conveniently, so that it can be poured through the foaming machine and its working stability can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the present invention from a first perspective;

[0020] Figure 2 This is a schematic diagram of the structure from a second viewing angle of the present invention;

[0021] Figure 3 It is a schematic diagram of the local structure of the present invention;

[0022] Figure 4 It is a schematic diagram of the partial split structure of the present invention;

[0023] Figure 5 Schematic diagram of the foaming platform structure of the present invention;

[0024] Figure 6 This is a schematic diagram of the split structure of the foaming platform of the present invention;

[0025] Figure 7 for Figure 6 A schematic diagram of the structure enlarged in the middle;

[0026] Figure 8 It is a schematic cross-sectional view of the clamping and limiting mechanism of the present invention.

[0027] Figure: 1, outer tube extruder body; 2, water circulation cooling device; 3, cutting device; 4, support frame; 5, medium frequency heating coil; 6, pipe threading machine; 7, mobile processing mechanism; 701, fixed frame; 702, linear guide rail; 703, slider; 8, screw lift; 9, foaming platform; 901, mounting base; 902, blocking device; 903, limit frame; 904, connecting rod; 91, synchronous limit mechanism; 911, ring frame; 912, support plate; 913, motor; 914, worm; 9 15. Through-hole; 916. Rotating block; 917. Tooth groove; 918. Adjusting groove; 919. Limit rod; 9110. Support rod; 9111. Guide rod; 9112. Sleeve; 9113. Limit frame; 92. Clamping and limiting mechanism; 921. Mounting plate; 922. Pull rod; 923. Limit block; 924. Spring; 925. Matching groove; 926. Fixed seat; 927. Raised strip; 928. Limit plate; 929. Connecting shaft; 9210. Connecting seat; 9211. Handle; 10. Controller. DETAILED DESCRIPTION

[0028] The present invention will be further described below with reference to the embodiments.

[0029] See also Figure 1-8 The present invention provides an integrated mechanical device for producing polyethylene outer sheathed rigid polyurethane insulation pipes, comprising an outer sheathed pipe extruder body 1, a water circulation cooling device 2, a cutting device 3, a supporting frame 4, a medium frequency heating coil 5 and a pipe threading machine 6. The water circulation cooling device 2, the cutting device 3, the supporting frame 4 and the medium frequency heating coil 5 are sequentially arranged on the left side of the outer sheathed pipe extruder body 1, and the processed outer sheathed pipe is supported and placed by the supporting frame 4. A mobile processing mechanism 7 is provided below the pipe threading machine 6, and the pipe threading machine 6 is arranged on the left side of the medium frequency heating coil 5 through the mobile processing mechanism 7. A foaming platform 9 is provided on the front and rear sides of the mobile processing mechanism 7, and screw lifts 8 are provided on the left and right sides of the foaming platform 9. The foaming platform 9 is lifted and lowered by the screw The machine 8 (the working principle of the screw lift 8 is realized by the existing technology and will not be described in detail here) performs the lifting operation. A controller 10 is provided on the left side of the foaming platform 9. The overall operation of the device is controlled by the controller 10. The outer protective tube is processed and produced by the outer protective tube extruder body 1. The produced outer protective tube is cooled by water circulation through the water circulation cooling device 2 to make it hardened, and is supported by the support frame 4. At this time, it is cut by the cutting device 3, and the processed outer protective tube is placed on the upper part of the support frame 4 (the production working principle of the outer protective tube is realized by the existing technology principle, and only a brief description is made here. The specific working principle is a technical solution that can be easily known to those skilled in the art and will not be described in detail here).

[0030] The foaming platform 9 includes a mounting seat 901, a sealing device 902, a limit frame 903 and a connecting rod 904. The mounting seat 901 is fixedly connected to the left and right sides of the limit frame 903 through the connecting rod 904. The mounting seat 901 is connected to the screw elevator 8 and is lifted and lowered by the screw elevator 8. The sealing device 902 is fixedly installed on both sides of the limit frame 903 through the mounting seat 901. Synchronous limit mechanisms 91 are provided on the left and right sides of the limit frame 903 for limiting and adjusting the inside of the limit frame 903. Clamping limit mechanisms 92 are provided on the front and back sides of the limit frame 903.

[0031] Further as Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, it is worth mentioning that the mobile processing mechanism 7 includes a fixed frame 701 and a linear guide rail 702. The linear guide rail 702 is fixedly connected to the fixed frame 701 and is arranged below the limit frame 903. A slider 703 is slidingly arranged on the linear guide rail 702. The slider 703 is fixedly connected to the bottom of the pipe threading machine 6. The linear guide rail 702 is electrically connected to the controller 10. Two pipe threading machines 6 are arranged on the upper part of the linear guide rail 702 through the slider 703. The two pipe threading machines 6 are arranged at intervals in front and back and are respectively matched with the medium frequency heating coil 5 and the foaming platform 9.

[0032] When in use, the linear guide rail 702 is operated to make the pipe threading machine 6 slide on it through the slider 703, and one pipe threading machine 6 is moved to a station that matches the medium frequency heating coil 5, and the working steel pipe is placed on it. At this time, the medium frequency heating coil 5 and the pipe threading machine 6 are used to thread the working steel pipe and the outer protective pipe (the pipe threading working principle is the existing technology and is not described in detail here). The double station set by the linear guide rail 702 is combined with the foaming platform 9 set before and after it. When the pipe threading work on one of the pipe threading machines 6 is completed, it can be quickly It is transported to one of the foaming platforms 9 for foaming and pouring. At the same time, another pipe threading machine 6 is transported to the medium frequency heating coil 5 through the linear guide rail 702 to perform another pipe threading work. After the pipe threading is completed and the pipes in the foaming platform 9 are foamed and poured, the pipes with completed pipe threading are transported to another foaming platform 9 for pouring, and the poured pipes are unloaded for subsequent inspection, packaging and storage. In this way, double-station alternating production is realized, thereby improving its production efficiency.

[0033] According to the above working process, it can be known that: through the mobile processing mechanism 7, the pipe threading machine 6 and the outer protective pipe extruder body 1 are installed in alignment, so that the processed outer protective pipe can be conveniently threaded through the pipe threading machine 6, and through the mobile processing mechanism 7, two working positions are provided on it, and the foaming platform 9 is provided, which can realize the pouring of the insulation layer of the pipe after the pipe threading is completed. At the same time, through the setting of the double working position, its processing and production efficiency can be greatly improved. The overall integrated production capacity of the device is relatively strong, and the lifting work of pipe threading and foaming pouring is reduced during the processing of the pipeline, which reduces the labor cost and increases the safety of the pipeline transportation process on the basis of reducing its production cost.

[0034] Further as Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7As shown, it is worth mentioning that the synchronous limiting mechanism 91 includes an annular frame 911, which is fixedly connected to the outside of the limiting frame 903 and connected to the connecting rod 904. A support plate 912 is fixedly connected to the upper part of the annular frame 911. Two annular frames 911 are provided on the limiting frame 903 and are symmetrically arranged on the left and right. The annular frame 911 is arranged in a circular ring shape and is passed through the middle. The rotating block 916 matches the annular frame 911 and rotates within the annular frame 911. A motor 913 is fixedly installed on the front surface of the support plate 912. A worm 914 is fixedly connected to the output end of the motor 913. The worm 914 is rotatably installed on the upper part of the annular frame 911 through the support plate 912. The worm 914 is correspondingly provided with a through hole 915 on the upper part of the annular frame 911. A rotating block 916 is provided for rotation inside the annular frame 911. The upper part of the rotating block 916 is provided with a connection with the worm 914 The meshing tooth grooves 917, the rotating block 916 is provided with an adjustment groove 918, and a limit rod 919 is provided in the adjustment groove 918 to limit the sliding. Three adjustment grooves 918 are provided on the rotating block 916, and the three adjustment grooves 918 are provided on the rotating block 916 at the same intervals. The adjustment grooves 918 are arranged in an arc-shaped groove. The limit rod 919 is fixedly connected to a support rod 9110 at one end inside the motor 913, and a guide rod 9111 is fixedly connected to the upper part of the support rod 9110. A sleeve 9112 is slidingly provided on the outside of the guide rod 9111, and the sleeve 9112 is fixedly connected to the limit frame 903. The support rod 9110 is fixedly connected to a limit frame 9113 on one side inside the limit frame 903. The guide rod 9111 is provided with three adjustment grooves 918 through the limit rod 919 and the support rod 9110. The central axes of the three guide rods 9111 coincide with the center of the annular frame 911.

[0035] During use, the motor 913 is operated to cause the worm 914 to rotate, and then the rotating block 916 is driven to rotate in the annular frame 911 through the tooth groove 917. Since the limiting rod 919 slides in the adjustment groove 918, the adjustment groove 918 rotates under the rotation of the rotating block 916 to push the limiting rod 919 therein, so that the support rod 9110 slides under the setting of the sleeve 9112 through the guide rod 9111, thereby adjusting the position of the limit frame 9113 and performing matching limit work on the pipeline.

[0036] Further as Figure 3 、 Figure 5 、 Figure 6 and Figure 8As shown, it is worth mentioning that the clamping limit mechanism 92 includes a mounting plate 921, which is fixedly connected to the limit frame 903, and a pull rod 922 is slidably provided on the mounting plate 921. The pull rod 922 is fixedly connected to a limit block 923 at one end inside the limit frame 903. A spring 924 is provided on the outer side of the pull rod 922 and is provided between the limit block 923 and the mounting plate 921. The limit block 923 is provided with a matching groove 925 on one side inside the limit frame 903, and a fixed seat 926 is rotatably provided in the matching groove 925. The left and right ends of the fixed seat 926 are fixedly connected It is connected to a connecting shaft 929, and a connecting seat 9210 is rotatably connected to the connecting shaft 929. The connecting seat 9210 is fixedly connected to the inner side of the limit frame 903. The fixed seat 926 is rotatably set on the connecting seat 9210 through the connecting shaft 929. A limiting plate 928 is fixedly connected to the fixed seat 926, and a handle 9211 is fixedly connected to the outer bottom of the limiting plate 928. A ridge 927 is provided on the corresponding matching groove 925 on the fixed seat 926, and a limiting groove matching the ridge 927 is opened on the inner surface of the matching groove 925 for limiting the rotation of the fixed seat 926.

[0037] When in use, pull the pull rod 922 so that the pull rod 922 slides and drives the limit block 923 to move, so that the matching groove 925 is released from the limit on the protrusion 927, so that the limit plate 928 can be rotated on the connecting seat 9210 through the connecting shaft 929, thereby limiting the outside of the pipe by rotating the limit plate 928, and under the setting of the spring 924, the limit block 923 can limit the protrusion 927 through the matching groove 925, thereby completing the limiting operation of the limit plate 928, thereby facilitating the foaming pouring work through the foaming machine (not shown in the figure), and improving the stability of the pipe processing.

[0038] This solution has the following working process: when this device is used, the outer protective tube is processed and produced by the outer protective tube extruder main body 1, and the produced outer protective tube is cooled by water circulation through the water circulation cooling device 2 to make it hardened, and is supported by the support bracket 4. At this time, it is cut by the cutting device 3, and the processed outer protective tube is placed on the upper part of the support bracket 4 (the production working principle of the outer protective tube is realized by the existing technical principle, and only a brief description is made here. The specific working principle is a technical solution that can be easily known to those skilled in the art, and will not be described in detail here). At this time, the linear guide rail 702 is operated to make the pipe threading machine 6 slide on it through the slider 703, and a pipe threading machine 6 is moved to a work station matching the medium frequency heating coil 5, and the working steel pipe is placed on it. At this time, the medium frequency heating coil 5 and the pipe threading machine 6 are used to thread the working steel pipe and the outer protective tube (the pipe threading working principle is The prior art is not described in detail here. The double workstations are set by the linear guide rail 702, and the foaming platforms 9 are set in front and behind it. When the pipe threading work on one of the pipe threading machines 6 is completed, it can be quickly transported to one of the foaming platforms 9 for foaming and pouring. At the same time, the other pipe threading machine 6 is transported to the medium frequency heating coil 5 through the linear guide rail 702 to perform other pipe threading work. When the pipe threading is completed and the pipes in the foaming platform 9 are foamed and poured, the pipes with completed pipe threading are transported to another foaming platform 9 for pouring, and the poured pipes are unloaded for subsequent inspection, packaging and storage. In this way, the alternating production work of the double workstations is realized, thereby improving its production efficiency. At the same time, compared with the existing production technology, two lifting processes are reduced, thereby reducing labor costs and increasing the safety of pipeline transportation.

[0039] When the pipe is foamed and poured through the foaming platform 9, the pipe is transported to the bottom of the limit frame 903 through the pipe threading machine 6. At this time, the screw lifter 8 is operated to move the limit frame 903 down to the outside of the pipe through the mounting seat 901. At this time, the motor 913 is operated to rotate the worm 914, and then the rotating block 916 is driven to rotate in the annular frame 911 through the tooth groove 917. Since the limit rod 919 slides in the adjustment groove 918, the adjustment groove 918 rotates under the rotation of the rotating block 916 to push the limit rod 919 inside it, so that the support rod 9110 slides under the setting of the sleeve 9112 through the guide rod 9111, thereby making The position of the limit frame 9113 is adjusted to match and limit the pipeline, and the pull rod 922 is pulled so that the pull rod 922 slides and drives the limit block 923 to move, so that the matching groove 925 is released from the limit on the convex strip 927, so that the limit plate 928 can be rotated on the connecting seat 9210 through the connecting shaft 929, thereby limiting the outside of the pipeline by rotating the limit plate 928, and under the setting of the spring 924, the limit block 923 can limit the convex strip 927 through the matching groove 925, thereby completing the limiting operation of the limit plate 928, thereby facilitating the foaming pouring work through the foaming machine (not shown in the figure) and improving the stability of pipeline processing.

[0040] In summary: through the mobile processing mechanism 7, the pipe threading machine 6 and the outer protective pipe extruder body 1 are installed in alignment, so that the processed outer protective pipe can be conveniently threaded through the pipe threading machine 6, and through the mobile processing mechanism 7, two working positions are provided on it, and the foaming platform 9 is provided, which can realize the pouring of the insulation layer of the pipe after the pipe threading is completed. At the same time, through the setting of the double workstations, its processing and production efficiency can be greatly improved. The overall integrated production capacity of the device is relatively strong, and the lifting work of pipe threading and foaming pouring is reduced during the processing of the pipeline, which reduces the labor cost and increases the safety of the pipeline transportation process on the basis of reducing its production cost; through the synchronous limiting mechanism 91 and the clamping limiting mechanism 92 provided on the foaming platform 9, the pipeline can be clamped and limited quickly and conveniently, so that it can be poured through the foaming machine, thereby improving its working stability.

[0041] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

[0042] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An integrated mechanical device for producing polyethylene outer sheathed rigid polyurethane insulation pipes, comprising an outer sheathed pipe extruder body (1), a water circulation cooling device (2), a cutting device (3), a support frame (4), a medium frequency heating coil (5) and a pipe threading machine (6), wherein the water circulation cooling device (2), the cutting device (3), the support frame (4) and the medium frequency heating coil (5) are sequentially arranged on the left side of the outer sheathed pipe extruder body (1), and the processed outer sheathed pipe is supported and placed by the support frame (4), characterized in that: A mobile processing mechanism (7) is provided below the pipe threading machine (6), and the pipe threading machine (6) is provided on the left side of the medium frequency heating coil (5) through the mobile processing mechanism (7). A foaming platform (9) is provided on the front and rear sides of the mobile processing mechanism (7), and screw lifts (8) are provided on the left and right sides of the foaming platform (9). The foaming platform (9) is lifted and lowered by the screw lifts (8). A controller (10) is provided on the left side of the foaming platform (9), and the overall operation of the device is controlled by the controller (10); The foaming platform (9) comprises a mounting seat (901), a blocking device (902), a limiting frame (903) and a connecting rod (904); the mounting seat (901) is fixedly connected to the left and right sides of the limiting frame (903) via the connecting rod (904); the mounting seat (901) is connected to a screw elevator (8) and is lifted and lowered via the screw elevator (8); the blocking device (902) is fixedly mounted on both sides of the limiting frame (903) via the mounting seat (901); synchronous limiting mechanisms (91) are provided on the left and right sides of the limiting frame (903) for limiting and adjusting the interior of the limiting frame (903); and clamping limiting mechanisms (92) are provided on the front and rear sides of the limiting frame (903); The mobile processing mechanism (7) includes a fixed frame (701) and a linear guide rail (702), wherein the linear guide rail (702) is fixedly connected to the fixed frame (701) and is arranged below the limit frame (903), a slider (703) is slidably arranged on the linear guide rail (702), and the slider (703) is fixedly connected to the bottom of the pipe threading machine (6), and the linear guide rail (702) is electrically connected to the controller (10); The synchronous limiting mechanism (91) includes an annular frame (911), the annular frame (911) is fixedly connected to the outside of the limiting frame (903) and connected to the connecting rod (904), the upper part of the annular frame (911) is fixedly connected to a support plate (912), the front surface of the support plate (912) is fixedly mounted with a motor (913), the output end of the motor (913) is fixedly connected with a worm (914), the worm (914) is rotatably mounted on the upper part of the annular frame (911) through the support plate (912), the worm (914) is correspondingly provided with a through opening (915) on the upper part of the annular frame (911), and a rotating block (916) is rotatably provided inside the annular frame (911). A tooth groove (917) meshing with the worm (914) is provided on the upper portion of the rotating block (916); an adjustment groove (918) is provided through the rotating block (916); a limit rod (919) is provided in the adjustment groove (918) for limiting sliding; one end of the limit rod (919) is fixedly connected to a support rod (9110) inside the motor (913); a guide rod (9111) is fixedly connected to the upper portion of the support rod (9110); a sleeve (9112) is slidably provided on the outside of the guide rod (9111); the sleeve (9112) is fixedly connected to the limit frame (903); and the support rod (9110) is fixedly connected to a limit frame (9113) on one side inside the limit frame (903).

2. The integrated mechanical device for producing polyethylene-sheathed rigid polyurethane thermal insulation pipes according to claim 1, characterized in that: Two pipe threading machines (6) are provided on the upper part of the linear guide rail (702) via a slider (703), and the two pipe threading machines (6) are spaced apart from each other and are respectively matched with the medium frequency heating coil (5) and the foaming platform (9).

3. The integrated mechanical device for producing polyethylene-sheathed rigid polyurethane thermal insulation pipes according to claim 1, characterized in that: Two annular frames (911) are provided on the limiting frame (903) and are symmetrically arranged on both sides. The annular frames (911) are arranged in a circular ring shape and are through-through in the middle. The rotating block (916) matches the annular frame (911) and is limitedly rotated inside the annular frame (911).

4. The integrated mechanical device for producing polyethylene-sheathed rigid polyurethane thermal insulation pipes according to claim 3, characterized in that: Three adjusting grooves (918) are provided on the rotating block (916). The three adjusting grooves (918) are provided on the rotating block (916) at uniform intervals. The adjusting grooves (918) are provided in the form of arc grooves.

5. The integrated mechanical device for producing polyethylene-sheathed rigid polyurethane thermal insulation pipes according to claim 4, characterized in that: The guide rods (9111) are provided with three adjustment slots (918) through the limiting rods (919) and the supporting rods (9110), and the central axes of the three guide rods (9111) are arranged to coincide with the center of the annular frame (911).

6. The integrated mechanical device for producing polyethylene-sheathed rigid polyurethane thermal insulation pipes according to claim 1, characterized in that: The clamping and limiting mechanism (92) includes a mounting plate (921), the mounting plate (921) is fixedly connected to the limiting frame (903), a pull rod (922) is slidably provided on the mounting plate (921), one end of the pull rod (922) is fixedly connected to the limiting block (923) inside the limiting frame (903), a spring (924) is sleeved on the outside of the pull rod (922) and is arranged between the limiting block (923) and the mounting plate (921), a matching groove (925) is opened on one side of the limiting frame (903), and a fixed seat (925) is rotatably provided in the matching groove (925). 6), the left and right ends of the fixed seat (926) are fixedly connected with a connecting shaft (929), the connecting shaft (929) is rotatably connected with a connecting seat (9210), the connecting seat (9210) is fixedly connected to the inner side of the limiting frame (903), the fixed seat (926) is rotatably arranged on the connecting seat (9210) through the connecting shaft (929), the fixed seat (926) is fixedly connected with a limiting plate (928), the outer bottom of the limiting plate (928) is fixedly connected with a handle (9211), and the fixed seat (926) is provided with a convex strip (927) corresponding to the matching groove (925) thereof.

7. The integrated mechanical device for producing polyethylene-sheathed rigid polyurethane thermal insulation pipe according to claim 6, characterized in that: The inner surface of the matching groove (925) is provided with a limiting groove for matching the convex strip (927), which is used to limit the rotation of the fixing seat (926).

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