Composite pipe preheating box

Abstract

The utility model relates to the technical field of plastic pipe processing, in particular to a composite pipe preheating box. Comprising a box mechanism and a heating mechanism, a heating space allowing pipes to penetrate through is formed in the middle of the box mechanism, and the heating space is provided with an inlet and an outlet; a blocking adjusting mechanism is arranged on each of the inlets and outlets, each blocking adjusting mechanism comprises a limiting plate, a rotating disc, a rotating mechanism and a plurality of fan blades, the multiple fan blades are circumferentially and uniformly distributed on the limiting plate, one sides of the multiple fan blades are slidably connected with the limiting plate, and the other sides of the multiple fan blades are slidably connected with the rotating disc; when the rotating disc rotates, the multiple fan blades all move towards the inner side or the outer side of the rotating disc. The plugging adjusting mechanism is arranged, the fan blades are attached to the periphery of the pipe, the gap between the pipe and the inlet and outlet of the preheating box can be reduced, heat lost from the inlet and outlet of the pipe is reduced, the preheating effect on pipes with different outer diameters is good, and the heating efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic pipe processing, and more specifically, to a preheating box for composite pipes. Background Art

[0002] Composite pipes are pipes based on the composite structure of metal and thermoplastic plastics, and are formed by lining with polypropylene, polyethylene or externally welding cross-linked polyethylene and other non-metallic materials, having the advantages of both metal pipes and non-metallic pipes. When composite pipes enter an injection molding machine for processing into other shapes, they need to be preheated through a preheating box first.

[0003] The prior art discloses a high-temperature ceramic infrared plate-shaped radiator oven. Two moving parts can make two box body parts form a box body or be disassembled through two moving frames; when combined into a box body, a heating space is formed in the middle of the box body, a high-temperature ceramic infrared plate-shaped radiator group is arranged in the heating space, and a blowing system is communicated with a blowing gap; a control electric box is electrically connected to the moving mechanism, the box body and the blowing system. This oven effectively improves the accuracy of temperature control, reduces the rejection rate, and reduces the labor intensity and production cost, improving the production efficiency. However, when preheating pipes with a smaller outer diameter, the heat generated by the oven is easily lost from the inlet and outlet of the pipes, resulting in a large difference in the preheating effect of the oven on pipes with different outer diameters. Content of the Utility Model

[0004] The purpose of the utility model is to provide a preheating box for composite pipes, which reduces the heat loss from the inlet and outlet of the pipes, so as to have a better preheating effect on pipes with different outer diameters.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A preheating box for composite pipes includes a box body mechanism and a heating mechanism. There is a heating space for the pipe to pass through in the middle of the box body mechanism, and the heating space has an inlet and an outlet; the heating mechanism is arranged on the box body mechanism and is located at the heating space; plugging and adjusting mechanisms are arranged on both the inlet and the outlet. The plugging and adjusting mechanism includes a limiting plate, a rotating disc, a rotating mechanism and a plurality of fan blades. The limiting plate is arranged on the box body mechanism, the plurality of fan blades are circumferentially and evenly arranged on the limiting plate, one side of each of the plurality of fan blades is slidably connected to the limiting plate, and the other side of each of the plurality of fan blades is slidably connected to the rotating disc; the rotating mechanism is arranged on the box body mechanism, and the rotating disc is connected to the output end of the rotating mechanism; when the rotating disc rotates, the plurality of fan blades all move towards the inside or the outside of the rotating disc.

[0007] According to the above technical means, a composite pipe preheating box provided by the utility model, before preheating the pipe, starts the rotating mechanism to drive multiple fan blades to move towards the outside of the rotating disk, leaving enough space for the pipe to enter. The pipe is fed into the box mechanism from the inlet, and the part to be heated is located in the heating space. Then start the rotating mechanism to drive the rotating disk to rotate in the reverse direction, so that the fan blades move towards the inside of the rotating disk under the action of the limiting plate and the rotating disk, making the fan blades fit against the outer circumference of the pipe, and start the heating mechanism to heat the pipe. The fan blades that fit against the outer circumference of the pipe can reduce the gap between the pipe and the inlet and outlet of the preheating box, reduce the heat loss from the inlet and outlet of the pipe, so that the preheating effect on pipes with different outer diameters is better, and the heating efficiency is improved.

[0008] Further, the fan blade is provided with a first slider and a second slider, the limiting plate is provided with limiting straight grooves equal in number to the fan blades, and the first slider is slidably connected in the limiting straight grooves; the rotating disk is provided with arc-shaped sliding grooves equal in number to the fan blades, the concave arc surface of the arc-shaped sliding groove faces the center of the rotating disk, and the second slider is slidably connected in the arc-shaped sliding grooves; the limiting straight grooves gradually incline clockwise from the center of the limiting plate to the outside, and the arc-shaped sliding grooves gradually incline counterclockwise from the center of the rotating disk to the outside; or, the limiting straight grooves gradually incline counterclockwise from the center of the limiting plate to the outside, and the arc-shaped sliding grooves gradually incline clockwise from the center of the rotating disk to the outside. When the rotating disk is rotated, the second slider slides in the arc-shaped sliding groove, and at the same time the first slider slides in the limiting straight groove, so that the fan blade moves towards the inside or outside of the rotating disk, thereby changing the distance between the fan blade and the pipe.

[0009] Further, the adjacent two fan blades are hermetically connected to prevent heat from flowing out of the gap between the adjacent fan blades, making the preheating effect better.

[0010] Further, the fan blade is made of high-temperature soft glue. This enables the fan blade to fit more closely to the pipe, thereby further preventing heat from flowing out between the fan blade and the pipe, making the preheating effect better.

[0011] Further, the rotating mechanism includes a mounting seat, a rotating shaft, a gear, an arc-shaped rack and a handwheel. The mounting seat is arranged on the box mechanism, the rotating shaft is rotatably arranged on the mounting seat, and the gear is sleeved on the rotating shaft; the arc-shaped rack is arranged on the outer circumference of the rotating disk, and the rotating shaft of the arc-shaped rack is coaxial with the rotating shaft of the rotating disk; the gear is meshed with the arc-shaped rack, and the handwheel is coaxially arranged on the rotating shaft with the gear. When changing the distance between the fan blade and the pipe, rotate the handwheel to drive the gear to rotate, the gear drives the arc-shaped rack to move, and the arc-shaped rack drives the rotating disk to rotate.

[0012] Further, it also includes a frame assembly and a moving mechanism. The box body mechanism includes a first box body assembly and a second box body assembly which are oppositely arranged. When the first box body assembly and the second box body assembly are combined to form the box body mechanism, the cavity enclosed by the first box body assembly and the second box body assembly is the heating space. The moving mechanism is installed on the frame assembly and is respectively connected to the first box body assembly and the second box body assembly, and is used to drive the first box body assembly and the second box body assembly to move towards or away from each other. The heating mechanism is arranged on the first box body assembly and the second box body assembly, and the limiting plate and the rotating mechanism are both arranged on the first box body assembly or both arranged on the second box body assembly. By setting the moving mechanism, the first box body assembly and the second box body assembly can move towards or away from each other. When moving towards each other and combining to form the box body mechanism, the local part of the pipe entering the heating space is heated. When moving away from each other and disassembling, the remaining pipes that do not need to be heated can pass through, so as to control the heating position of the pipes.

[0013] Further, mounting plates and electric fans are both arranged on the first box body assembly and the second box body assembly. The heating mechanism is arranged on the mounting plates. Ventilation slots are formed in the mounting plates, and the blowing direction of the electric fans faces the heating space. Through the setting of the electric fans, the heat distribution in the heating space can be made uniform. By setting the ventilation slots, the pipes can be directly blown, so that the pipes are heated evenly and the heating efficiency is improved.

[0014] Further, a protective cover is arranged on the mounting plates. The wires of the heating mechanism are located between the protective cover and the mounting plates. A maintenance opening is formed in the protective cover, and a protective cover lid is detachably installed on the protective cover. The protective cover lid is located at the maintenance opening. Single-opening door panels are detachably arranged on the first box body assembly and the second box body assembly. The wires of the heating mechanism are protected by the protective cover to prevent the wiring ends of the wires from loosening after the electric fans blow the wires for a long time, and at the same time, it can also prevent dust and water, and protect the wires. Through the setting of the protective cover lid and the single-opening door panels, it is convenient to repair the heating mechanism.

[0015] Furthermore, a temperature measuring mechanism is further included. The temperature measuring mechanism includes a first bracket, a second bracket, a fastener, and a temperature sensor. The first bracket is arranged on the first box body assembly and / or the second box body assembly along the axial direction of the pipe. The second bracket is slidably connected to the first bracket along the radial direction of the pipe; alternatively, the first bracket is arranged on the first box body assembly and / or the second box body assembly along the radial direction of the pipe, and the second bracket is slidably connected to the first bracket along the axial direction of the pipe. The fastener is used to fix the position of the second bracket on the first bracket. The temperature sensor is arranged on the second bracket, and the detection direction faces the inlet and outlet. By adjusting the position of the temperature sensor relative to the pipe through the first bracket and the second bracket, the temperature of the pipe can be measured, and the heating state of the pipe can be fed back in real time.

[0016] Furthermore, the heating mechanism includes a plurality of high-temperature ceramic infrared plate radiators, and the plurality of high-temperature ceramic infrared plate radiators are all installed and connected to the mounting plate. The maximum heating temperature of the high-temperature ceramic infrared plate radiator can reach above 1000 °C, which can effectively increase the temperature upper limit, make the heating faster, and improve the heating efficiency.

[0017] Furthermore, the moving mechanism includes a first moving component and a second moving component. The first moving component is connected to the first box body assembly, and the second moving component is connected to the second box body assembly. Both the first moving component and the second moving component include a guide rail, a slider, a cylinder fixing seat, and an opening and closing cylinder. The guide rail and the cylinder fixing seat are both arranged on the frame assembly. The slider is slidably connected to the guide rail. The first box body assembly or the second box body assembly is installed and connected to the slider. The opening and closing cylinder is installed and connected to the cylinder fixing seat. The opening and closing cylinder is located inside the frame assembly, and there is a gap between the opening and closing cylinder and both the first box body assembly and the second box body assembly. Cylinder rod end seats are also arranged on both the first box body assembly and the second box body assembly, and the cylinder rod end seats are connected to the output end of the opening and closing cylinder. When controlling the opening and closing state of the box body mechanism, start the opening and closing cylinder to drive the cylinder rod end seat to move, drive the first box body assembly and the second box body assembly to move towards or away from each other. The first box body assembly and the second box body assembly drive the slider to slide on the guide rail, making the movement of the first box body assembly and the second box body assembly smoother. By setting the opening and closing cylinder to drive the box body mechanism to move, the production beat can be accelerated. By making the opening and closing cylinder have no contact with the first box body assembly and the second box body assembly, it can be avoided that the opening and closing cylinder is damaged due to excessive temperature.

[0018] Compared with the prior art, the beneficial effects are:

[0019] 1. A preheating box for composite pipes provided by the utility model can reduce the gap between the pipe and the inlet and outlet of the preheating box by setting a plugging and adjusting mechanism to make the fan blades fit the outer circumference of the pipe, reduce the heat loss from the inlet and outlet of the pipe, and thus have a good preheating effect on pipes with different outer diameters and improve the heating efficiency.

[0020] 2. A preheating box for composite pipes provided by the utility model can make the heat distribution in the heating space uniform by setting an electric fan, and can directly blow the pipe through the ventilation slot to make the pipe heated evenly and improve the heating efficiency.

[0021] 3. A preheating box for composite pipes provided by the utility model can protect the wires of the heating mechanism through a protective cover, prevent the wiring ends of the wires from loosening after the electric fan blows the wires for a long time, and can also prevent dust and water, protecting the wires; the setting of the protective cover and the single-opening door panel can facilitate the maintenance of the heating mechanism.

[0022] 4. A preheating box for composite pipes provided by the utility model can accelerate the production rhythm by setting an opening and closing cylinder to drive the box body mechanism; by making the opening and closing cylinder have no contact with the first box body component and the second box body component, it can avoid damage caused by overheating of the opening and closing cylinder and extend the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the overall structure of the preheating box for composite pipes of the utility model;

[0024] Figure 2 is a schematic diagram of the structure of the plugging and adjusting mechanism of the utility model;

[0025] Figure 3 is a schematic diagram of the structure of the rotating mechanism of the utility model;

[0026] Figure 4 is a schematic diagram of the structure of the box body mechanism of the utility model;

[0027] Figure 5 is a schematic diagram of the structure of the first box body component of the utility model from the first perspective;

[0028] Figure 6 is a schematic diagram of the structure of the first box body component of the utility model from the second perspective;

[0029] Figure 7 is a schematic diagram of the structure of the frame component of the utility model;

[0030] Figure 8 is a schematic diagram of the structure of the moving mechanism of the utility model.

[0031] Among them, the illustration marks are explained as follows: 1. Cabinet mechanism; 101. First cabinet component; 111. Mounting plate; 1111. Ventilation slot; 112. Electric fan; 113. Protective cover; 114. Protective cover lid; 115. Single-opening door panel; 116. Cylinder rod end seat; 117. Male connector; 102. Second cabinet component; 2. Heating mechanism; 3. Plugging and adjusting mechanism; 301. Limiting plate; 311. Limiting straight slot; 302. Fan blade; 321. First slider; 322. Second slider; 303. Rotating disk; 331. Arc-shaped sliding slot; 304. Rotating mechanism; 341. Mounting seat; 342. Rotating shaft; 343. Gear; 344. Arc-shaped rack; 345. Handwheel; 4. Frame component; 401. Frame; 402. Support plate; 421. Sliding slot; 403. Double-opening door; 404. Foot cup; 5. Moving mechanism; 501. Guide rail; 502. Slider; 503. Cylinder fixing seat; 504. Opening and closing cylinder; 6. Temperature measuring mechanism; 601. First bracket; 602. Second bracket; 603. Fastener; 604. Temperature sensor; 7. Control electric box. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. The present invention will be described in one of the embodiments in conjunction with the specific implementation manners. Among them, the accompanying drawings are only for illustrative purposes, showing only schematic diagrams, rather than physical diagrams, and cannot be construed as a limitation to the present invention; in order to better illustrate the embodiments of the present invention, some components in the accompanying drawings will be omitted, enlarged or reduced, and do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted.

[0033] In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc., the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms used to describe the positional relationship in the drawings are only for illustrative purposes and should not be construed as a limitation of the present invention. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances. Additionally, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, such descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. Additionally, the meaning of "and / or" that appears throughout the text is that it includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or the solution where A and B are satisfied simultaneously.

[0034] Embodiment 1

[0035] As Figures 1 to 8 shown, this embodiment provides a preheating box for composite pipes, which includes a box body mechanism 1 and a heating mechanism 2. There is a heating space for the pipes to pass through in the middle of the box body mechanism 1, and the heating space has an inlet and an outlet; the heating mechanism 2 is arranged on the box body mechanism 1 and is located at the heating space; sealing and adjusting mechanisms 3 are arranged on both the inlet and the outlet. The sealing and adjusting mechanism 3 includes a limit plate 301, a rotating disk 303, a rotating mechanism 304, and a plurality of fan blades 302. The limit plate 301 is arranged on the box body mechanism 1, and the plurality of fan blades 302 are circumferentially and evenly arranged on the limit plate 301. One side of each of the plurality of fan blades 302 is slidably connected to the limit plate 301, and the other side of each of the plurality of fan blades 302 is slidably connected to the rotating disk 303; the rotating mechanism 304 is arranged on the box body mechanism 1, and the rotating disk 303 is connected to the output end of the rotating mechanism 304; when the rotating disk 303 rotates, the plurality of fan blades 302 all move towards the inner or outer side of the rotating disk 303.

[0036] According to the above technical means, a preheating box for composite pipes provided by the utility model, before preheating the pipes, start the rotating mechanism 304 to drive multiple fan blades 302 to move outward from the rotating disk 303, leaving enough space at the inlet and outlet for the pipes to enter. Insert the pipes into the box mechanism 1 from the inlet, so that the part to be heated is located in the heating space. Start the rotating mechanism 304 to drive the rotating disk 303 to rotate in the reverse direction, so that the fan blades 302 move toward the inner side of the rotating disk 303 under the action of the limiting plate 301 and the rotating disk 303, making the fan blades 302 fit against the outer circumference of the pipes. Then start the heating mechanism 2 to heat the pipes. The fan blades 302 that fit against the outer circumference of the pipes can reduce the gap between the pipes and the inlet and outlet of the preheating box, reduce the heat loss from the inlet and outlet of the pipes, and thus have a good preheating effect on pipes with different outer diameters and improve the heating efficiency.

[0037] Embodiment 2

[0038] A preheating box for composite pipes proposed in this embodiment, on the basis of Embodiment 1, in this embodiment, as Figure 2 shown, the fan blade 302 is provided with a first slider 321 and a second slider 322, and the limiting plate 301 is provided with limiting straight grooves 311 equal in number to the fan blades 302, and the first slider 321 is slidably connected in the limiting straight grooves 311; the rotating disk 303 is provided with arc-shaped sliding grooves 331 equal in number to the fan blades 302, and the concave arc surface of the arc-shaped sliding grooves 331 faces the center of the rotating disk 303, and the second slider 322 is slidably connected in the arc-shaped sliding grooves 331; the limiting straight grooves 311 gradually incline clockwise from the center of the limiting plate 301 to the outside, and the arc-shaped sliding grooves 331 gradually incline counterclockwise from the center of the rotating disk 303 to the outside; or, the limiting straight grooves 311 gradually incline counterclockwise from the center of the limiting plate 301 to the outside, and the arc-shaped sliding grooves 331 gradually incline clockwise from the center of the rotating disk 303 to the outside. When the rotating disk 303 is rotated, the second slider 322 slides in the arc-shaped sliding grooves 331, and at the same time the first slider 321 slides in the limiting straight grooves 311, so that the fan blades 302 move toward the inner or outer side of the rotating disk 303, thereby changing the distance between the fan blades 302 and the pipes.

[0039] Adjacent two fan blades 302 are sealed and connected, that is, adjacent two fan blades 302 are in contact with each other, avoiding heat from flowing out through the gaps between adjacent fan blades 302 and making the preheating effect better. The fan blades 302 are made of high-temperature soft glue, enabling the fan blades 302 to fit more closely to the pipes, thereby further avoiding heat from flowing out between the fan blades 302 and the pipes and making the preheating effect better. At the same time, the high-temperature soft glue can prevent the fan blades 302 from damaging the pipes.

[0040] As Figure 3As shown in the figure, the rotating mechanism 304 includes a mounting base 341, a rotating shaft 342, a gear 343, an arc-shaped rack 344, and a handwheel 345. The mounting base 341 is provided on the box body mechanism 1. The rotating shaft 342 is rotatably provided on the mounting base 341. The gear 343 is sleeved on the rotating shaft 342. The arc-shaped rack 344 is provided on the outer periphery of the rotating disk 303. The rotating shaft of the arc-shaped rack 344 is coaxial with the rotating shaft of the rotating disk 303. The gear 343 is meshed and connected with the arc-shaped rack 344. The handwheel 345 is coaxially provided on the rotating shaft 342 with the gear 343. When changing the distance between the fan blade 302 and the pipe, rotate the handwheel 345 to drive the gear 343 to rotate. The gear 343 drives the arc-shaped rack 344 to move. The arc-shaped rack 344 drives the rotating disk 303 to rotate.

[0041] Embodiment 3

[0042] A composite pipe preheating box proposed in this embodiment, on the basis of Embodiment 1, in this embodiment, as Figure 1 and Figure 4 shown, further includes a frame assembly 4 and a moving mechanism 5. The box body mechanism 1 includes a first box body assembly 101 and a second box body assembly 102 which are oppositely arranged. When the first box body assembly 101 and the second box body assembly 102 are assembled to form the box body mechanism 1, the cavity surrounded by the first box body assembly 101 and the second box body assembly 102 is the heating space. The heating mechanism 2 is provided on the first box body assembly 101 and the second box body assembly 102. The limiting plate 301 and the rotating mechanism 304 are both provided on the first box body assembly 101 or both provided on the second box body assembly 102. By providing the moving mechanism 5, the first box body assembly 101 and the second box body assembly 102 can move towards or away from each other. When moving towards each other and assembling into the box body mechanism 1, the pipe entering the heating space is locally heated. When moving away from each other and disassembling, the remaining pipes that do not need to be heated can pass through, so as to control the heating position of the pipes.

[0043] As Figure 1 and Figure 8As shown in the figure, the moving mechanism 5 is installed on the frame assembly 4 and is respectively connected to the first box assembly 101 and the second box assembly 102, and is used to drive the first box assembly 101 and the second box assembly 102 to move towards or away from each other. The moving mechanism 5 includes a first moving component and a second moving component. The first moving component is connected to the first box assembly 101, and the second moving component is connected to the second box assembly 102. Both the first moving component and the second moving component include a guide rail 501, a slider 502, a cylinder fixing seat 503, and an opening and closing cylinder 504. The guide rail 501 and the cylinder fixing seat 503 are both arranged on the frame assembly 4. The slider 502 is slidably connected to the guide rail 501. The first box assembly 101 or the second box assembly 102 is installed and connected to the slider 502. The opening and closing cylinder 504 is installed and connected to the cylinder fixing seat 503. The opening and closing cylinder 504 is located inside the frame assembly 4, and there are gaps between the opening and closing cylinder 504 and both the first box assembly 101 and the second box assembly 102. Cylinder rod end seats 116 are also provided on both the first box assembly 101 and the second box assembly 102, and the cylinder rod end seats 116 are connected to the output ends of the opening and closing cylinder 504. When controlling the opening and closing state of the box body mechanism 1, the opening and closing cylinder 504 is started to drive the cylinder rod end seats 116 to move, driving the first box assembly 101 and the second box assembly 102 to move towards or away from each other. The first box assembly 101 and the second box assembly 102 drive the slider 502 to slide on the guide rail 501, making the movement of the first box assembly 101 and the second box assembly 102 smoother. By setting the opening and closing cylinder 504 to drive the box body mechanism 1 to move, the production beat can be accelerated. By making the opening and closing cylinder 504 have no contact with the first box assembly 101 and the second box assembly 102, it can avoid damage to the opening and closing cylinder 504 due to overheating.

[0044] As Figure 7 shown, the frame assembly 4 includes a frame 401, a support plate 402 arranged at the top of the frame 401, a double - door 403 rotatably arranged on the frame 401, and foot cups 404 arranged at the bottom of the frame 401. A sliding groove 421 is opened on the support plate 402, and the cylinder rod end seat 116 is slidably connected to the sliding groove 421. The opening and closing cylinder 504 is located below the support plate 402, and the support plate 402 further insulates the opening and closing cylinder 504, further avoiding high - temperature damage to the opening and closing cylinder 504. Through the double - door 403, it is convenient to repair the opening and closing cylinder 504 located inside the frame 401. Through the foot cups 404, anti - slip can be achieved, avoiding the movement of the entire device.

[0045] Embodiment 4

[0046] A composite pipe preheating box proposed in this embodiment, on the basis of Embodiment 3, in this embodiment, as Figure 1 and Figure 5As shown, mounting plates 111 and electric fans 112 are provided on both the first box body assembly 101 and the second box body assembly 102. The blowing direction of the electric fan 112 faces the heating space. By arranging the electric fan 112, the heat in the heating space can be evenly distributed. The heating mechanism 2 is arranged on the mounting plate 111. Ventilation grooves 1111 are formed on the mounting plate 111. By arranging the ventilation grooves 1111, the pipes can be directly blown, so that the pipes are heated evenly and the heating efficiency is improved.

[0047] A protective cover 113 is provided on the mounting plate 111. The wires of the heating mechanism 2 are located between the protective cover 113 and the mounting plate 111. The protective cover 113 protects the wires of the heating mechanism 2, avoiding the loosening of the wiring ends of the wires after the electric fan 112 blows the wires for a long time. At the same time, it can also prevent dust and water, and protect the wires. A maintenance opening is formed on the protective cover 113. A protective cover lid 114 is detachably installed on the protective cover 113. The protective cover lid 114 is located at the maintenance opening. Single-opening door panels 115 are detachably provided on both the first box body assembly 101 and the second box body assembly 102, as Figure 6 shown. By arranging the protective cover lid 114 and the single-opening door panel 115, it is convenient to repair the heating mechanism 2.

[0048] Embodiment 5

[0049] A composite pipe preheating box proposed in this embodiment, on the basis of Embodiment 4, in this embodiment, as Figure 1 and Figure 5 shown, it further includes a temperature measuring mechanism 6. The temperature measuring mechanism 6 includes a first bracket 601, a second bracket 602, a fastener 603 and a temperature sensor 604. The first bracket 601 is arranged on the first box body assembly 101 and / or the second box body assembly 102 along the axial direction of the pipe. The second bracket 602 is slidably connected to the first bracket 601 along the radial direction of the pipe; or, the first bracket 601 is arranged on the first box body assembly 101 and / or the second box body assembly 102 along the radial direction of the pipe. The second bracket 602 is slidably connected to the first bracket 601 along the axial direction of the pipe; the fastener 603 is used to fix the position of the second bracket 602 on the first bracket 601; wherein the first bracket 601 and the second bracket 602 can be made of aluminum profiles. The temperature sensor 604 is arranged on the second bracket 602, and the detection direction faces the inlet and outlet. By adjusting the position of the temperature sensor 604 relative to the pipe through the first bracket 601 and the second bracket 602, the temperature of the pipe can be measured, and the heating state of the pipe can be fed back in real time.

[0050] As Figure 5 and Figure 6As shown, the heating mechanism 2 includes a plurality of high-temperature ceramic infrared plate radiators, and all of the plurality of high-temperature ceramic infrared plate radiators are installed and connected to the mounting plate 111. The maximum heating temperature of the high-temperature ceramic infrared plate radiator can reach above 1000 °C, which can effectively increase the temperature upper limit, make the heating faster, and improve the heating efficiency.

[0051] Among them, a plurality of high-temperature ceramic infrared plate radiators are evenly distributed on the mounting plate 111 of the first box body assembly 101 and the second box body assembly 102. The radiation directions of the radiators all face the inner sides of the first box body assembly 101 and the second box body assembly 102. The high-temperature ceramic infrared plate radiators located in the same box body assembly are divided into upper and lower groups, and the two groups of radiators form a semi-circular shape. Male connectors 117 are also provided on both the first box body assembly 101 and the second box body assembly 102. The wires of the two groups of radiators in the same box body assembly are electrically connected to the male connector 117 provided on this box body assembly.

[0052] As Figure 1 shown, it also includes a control electric box 7. The control electric box 7 is arranged on the frame assembly 4, and the control electric box 7 is controllably connected to the electric fan 112, the heating mechanism 2 and the opening and closing cylinder 504.

[0053] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0054] Obviously, the above-mentioned embodiments of the present invention are only examples for clearly explaining the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A composite pipe preheating box, comprising a box body (1) and a heating mechanism (2), wherein the box body (1) has a heating space in the middle for the pipe to pass through, and the heating space has an inlet and an outlet; the heating mechanism (2) is arranged on the box body (1) and is located in the heating space; and the characteristics are as follows: The inlet and outlet are each provided with a blocking adjustment mechanism (3), the blocking adjustment mechanism (3) comprising a limit plate (301), a rotating disk (303), a rotating mechanism (304) and a plurality of blades (302); the limit plate (301) is provided on the box mechanism (1); the plurality of blades (302) are evenly distributed on the limit plate (301) on a circumference; one side of the plurality of blades (302) is slidably connected to the limit plate (301); the other side of the plurality of blades (302) is slidably connected to the rotating disk (303); the rotating mechanism (304) is provided on the box mechanism (1); the rotating disk (303) is connected to an output end of the rotating mechanism (304); when the rotating disk (303) rotates, the plurality of blades (302) move toward the inside or outside of the rotating disk (303).

2. The composite pipe preheating box according to claim 1, characterized in that: The fan blade (302) is provided with a first slider (321) and a second slider (322); the limiting plate (301) is provided with limiting straight grooves (311) equal in number to the fan blade (302); the first slider (321) is slidably connected to the limiting straight grooves (311); the rotating disk (303) is provided with arc-shaped sliding grooves (331) equal in number to the fan blade (302); the concave arc surface of the arc-shaped sliding groove (331) faces the center of the rotating disk (303); the second slider (322) is slidably connected to the arc-shaped sliding groove (331); the limiting straight groove (311) is gradually inclined in a clockwise direction from the center of the limiting plate (301) to the outside, and the arc-shaped sliding groove (331) is gradually inclined in a counterclockwise direction from the center of the rotating disk (303) to the outside; Alternatively, the limiting straight groove (311) gradually tilts counterclockwise from the center of the limiting plate (301) to the outside, and the arc-shaped sliding groove (331) gradually tilts clockwise from the center of the rotating disk (303) to the outside.

3. The composite pipe preheating box according to claim 2, characterized in that: The two adjacent fan blades (302) are sealed and connected to each other, and the fan blades (302) are made of high-temperature soft glue.

4. The composite pipe preheating box according to claim 1, characterized in that: The rotating mechanism (304) comprises a mounting seat (341), a rotating shaft (342), a gear (343), an arc-shaped rack (344) and a hand wheel (345); the mounting seat (341) is arranged on the box mechanism (1); the rotating shaft (342) is rotatably arranged on the mounting seat (341); the gear (343) is sleeved on the rotating shaft (342); the arc-shaped rack (344) is arranged on the outer periphery of the rotating disk (303); the rotating shaft of the arc-shaped rack (344) is coaxial with the rotating shaft of the rotating disk (303); the gear (343) is meshedly connected with the arc-shaped rack (344); the hand wheel (345) is coaxially arranged on the rotating shaft (342) with the gear (343).

5. The composite pipe preheating box according to any one of claims 1 to 4, characterized in that: The heating device further comprises a frame assembly (4) and a moving mechanism (5); the box structure (1) comprises a first box assembly (101) and a second box assembly (102) which are arranged opposite to each other; when the first box assembly (101) and the second box assembly (102) are assembled to form the box structure (1), the cavity enclosed by the first box assembly (101) and the second box assembly (102) is the heating space; the moving mechanism (5) is mounted on the frame assembly (4) and is respectively connected to the first box assembly (101) and the second box assembly (102) to drive the first box assembly (101) and the second box assembly (102) to move towards or away from each other; the heating mechanism (2) is arranged on the first box assembly (101) and the second box assembly (102); the limiting plate (301) and the rotating mechanism (304) are both arranged on the first box assembly (101) or both arranged on the second box assembly (102).

6. The composite pipe preheating box according to claim 5, characterized in that: The first box assembly (101) and the second box assembly (102) are both provided with a mounting plate (111) and an electric fan (112); the heating mechanism (2) is arranged on the mounting plate (111); a ventilation slot (1111) is provided on the mounting plate (111); and the blowing direction of the electric fan (112) is toward the heating space.

7. The composite pipe preheating box according to claim 6, characterized in that: A protective cover (113) is provided on the mounting plate (111); the electric wires of the heating mechanism (2) are located between the protective cover (113) and the mounting plate (111); a maintenance opening is provided on the protective cover (113); a protective cover cover (114) is detachably mounted on the protective cover (113); the protective cover cover (114) is located at the maintenance opening; and a single-opening door panel (115) is detachably provided on both the first box assembly (101) and the second box assembly (102).

8. The composite pipe preheating box according to claim 5, characterized in that: The temperature measuring device (6) further comprises a temperature measuring mechanism (6), wherein the temperature measuring mechanism (6) comprises a first bracket (601), a second bracket (602), a fastener (603) and a temperature sensor (604), wherein the first bracket (601) is arranged on the first box assembly (101) and / or the second box assembly (102) along the axial direction of the pipe, and the second bracket (602) is slidably connected to the first bracket (601) along the radial direction of the pipe; Alternatively, the first bracket (601) is arranged on the first box assembly (101) and / or the second box assembly (102) along the radial direction of the tube, and the second bracket (602) is slidably connected to the first bracket (601) along the axial direction of the tube; The fastener (603) is used to fix the position of the second bracket (602) on the first bracket (601); the temperature sensor (604) is arranged on the second bracket (602), and the detection direction is toward the inlet and outlet.

9. The composite pipe preheating box according to claim 6, characterized in that: The heating mechanism (2) comprises a plurality of high-temperature ceramic infrared plate-shaped radiators, and the plurality of high-temperature ceramic infrared plate-shaped radiators are all mounted and connected to the mounting plate (111).

10. The composite pipe preheating box according to claim 5, characterized in that: The moving mechanism (5) comprises a first moving assembly and a second moving assembly, wherein the first moving assembly is connected to the first box assembly (101), and the second moving assembly is connected to the second box assembly (102), and the first moving assembly and the second moving assembly both comprise a guide rail (501), a slider (502), a cylinder fixing seat (503) and an opening and closing cylinder (504), wherein the guide rail (501) and the cylinder fixing seat (503) are both arranged on the frame assembly (4), the slider (502) is slidably connected to the guide rail (501), and the first box assembly (101) is ) or the second box assembly (102) is installed and connected to the slider (502), the opening and closing cylinder (504) is installed and connected to the cylinder fixing seat (503), the opening and closing cylinder (504) is located in the frame assembly (4), and there is a gap between the opening and closing cylinder (504) and the first box assembly (101) and the second box assembly (102); the first box assembly (101) and the second box assembly (102) are also provided with a cylinder rod end seat (116), and the cylinder rod end seat (116) is connected to the output end of the opening and closing cylinder (504).

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