A plastic pipe production guide and positioning device

Abstract

The present invention discloses a plastic pipe production guiding and positioning device. When guiding and positioning the plastic pipe, the lifting frame is first driven to rise and fall by a lifting cylinder so that the centers of the upper guide roller and the lower guide roller are at the height of the center lines of plastic pipes of different models, and the height between the upper guide roller and the lower guide roller is slightly larger than the diameter of the plastic pipe by adjusting the components; then, when the plastic pipe passes through and rests on the lower guide roller, the upper guide roller and the lower guide roller are brought close to each other so as to contact the top and bottom of the plastic pipe; then, the unfolding length of the folding frame is adjusted to provide good support for the suspended part of the plastic pipe according to the on-site installation conditions, so as to solve the problem of sagging deformation of the plastic pipe; at the same time, during the lifting and lowering process of the lifting frame and the lifting seat below, the ground support components can maintain a state of being supported on the ground and can maintain a vertical state, so as to improve the stability of the supporting mechanism during use.

Description

Technical Field

[0001] The invention relates to the technical field of plastic pipe production, and in particular to a plastic pipe production guiding and positioning device. Background Art

[0002] Plastic pipes are usually made of polyester, with stabilizers, lubricants, plasticizers, etc. added. They are extruded in a pipe making machine using a "molding" method. They are mainly used as pipes for tap water supply systems in buildings, drainage, exhaust and sewage sanitary pipes, underground drainage systems, rainwater pipes, and threading pipes for electrical wiring installation. After the plastic pipes are extruded from the pipe making machine, they will undergo subsequent processing steps such as cooling and cutting. In order to better connect the two processes, a guiding and positioning device is usually set between the two processes to reduce the deformation of the plastic pipe during transportation between the two processes. For example, a Chinese patent application with application publication number CN108527812A and application publication date of September 14, 2018 discloses a plastic pipe processing guide device that can guide the plastic pipe and correct the transmission path of the plastic pipe.

[0003] However, in the above-mentioned comparative patent, if the processing equipment of the two preceding and following processes are placed at a long distance, after a single guide positioning device is placed, there is still a problem of a large distance between the guide positioning device and the adjacent processing equipment, resulting in a problem that the part of the plastic pipe suspended between the processing equipment and the guide positioning device droops and deforms due to being too long. At the same time, when the length of the suspended part of the plastic pipe is constant, the thinner the diameter of the produced plastic pipe is, the more likely it is to droop and deform. Summary of the Invention

[0004] The purpose of the present invention is to provide a plastic pipe production guiding and positioning device, which solves the problem of sagging deformation of the plastic pipe by arranging a deployable supporting mechanism to support the suspended part of the plastic pipe.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions: A plastic pipe production guiding and positioning device, comprising a support frame, a guide mechanism lifted and lowered on the support frame, and two supporting mechanisms distributed on the front and rear sides of the support frame, wherein the guide mechanism comprises a lifting frame lifted and lowered on the support frame, a lifting cylinder arranged between the support frame and the lifting frame, two lifting seats lifted and lowered on the lifting frame, an upper guide roller arranged on the lower surface of the upper lifting seat, a lower guide roller arranged on the upper surface of the lower lifting seat, and a guide roller arranged between the lifting frame and the two lifting seats to drive the two lifting seats to move closer to or closer to each other. The support mechanism includes two support seats arranged at both ends of the side of the lifting seat located below, two mounting profiles respectively arranged on the support seats and arranged along the vertical direction, two folding frames respectively arranged on the mounting profiles and foldable or retractable, a plurality of auxiliary guide rollers, and a ground support component arranged on the two folding frames and supporting the ground; the folding frame includes a plurality of first connecting arms arranged side by side, a plurality of second connecting arms arranged side by side and respectively crossing the plurality of first connecting arms, the middle part of the first connecting arm is hinged to the middle part of the second connecting arm, and the lower end of the first connecting arm is hinged to the adjacent The lower end of the second connecting arm is hinged, the upper end of the first connecting arm is hinged to the upper end of the adjacent second connecting arm, the upper end of the first hinged arm close to the mounting profile is hinged to the upper end of the mounting profile, and the lower end of the second connecting arm close to the mounting profile is slidably arranged on the mounting profile along the vertical direction, and a plurality of telescopic parts in a "diamond shape" and hinged at the end points are formed on the folding frame, the top hinge of the telescopic part is provided with a first hinge shaft hinged to the first connecting arm and the second connecting arm, and the bottom hinge of the telescopic part is provided with a second hinge shaft hinged to the first connecting arm and the second connecting arm; the two folding frames correspond to The first connecting shaft is provided at one end of the telescopic part of the two folding frames, and the first hinge axes are close to each other. The two ends of the auxiliary guide roller are arranged between the corresponding two first connecting shafts. The rotation axes of the lower guide roller and the auxiliary guide roller are at the same height. The plastic pipe extends in a straight line when placed on the lower guide roller and multiple auxiliary guide rollers; the second connecting shaft is provided at one end of the telescopic part of the two folding frames, which are away from each other, and the second hinge axes are away from each other. The ground support assembly is arranged between the two second connecting shafts, and during the lifting process of the lifting frame and the lifting seat below, the ground support assembly can remain supported on the ground and can remain in a vertical state.

[0006] By adopting the above technical solution, since the centerline heights of different types of plastic pipes processed by the pipe making machine are the same (the centerline heights of the corresponding processing molds are the same), when guiding and positioning the plastic pipe, the lifting frame is first driven to rise and fall by the lifting cylinder so that the centers of the upper guide roller and the lower guide roller are at the heights of the centerlines of plastic pipes of different types, and the height between the upper guide roller and the lower guide roller is slightly larger than the diameter of the plastic pipe by adjusting the components; then, when the plastic pipe passes through and rests on the lower guide roller, the upper guide roller and the lower guide roller are brought close to each other so as to contact the top and bottom of the plastic pipe; then the unfolded length of the folding frame is adjusted to provide good support for the suspended part of the plastic pipe according to the on-site installation conditions to solve the problem of sagging deformation of the plastic pipe; at the same time, during the lifting and lowering process of the lifting frame and the lifting seat below, the ground support components can remain supported on the ground and can remain in a vertical state to improve the stability of the supporting mechanism during use.

[0007] The present invention is further configured as follows: the adjustment assembly includes a guide shaft, a bidirectional lead screw rotatably connected to the lifting frame and having two threaded ends with opposite thread directions, two lead screw nuts respectively arranged on the two threaded ends, and an adjustment handwheel arranged at the upper end of the bidirectional lead screw; the guide shaft passes through one end of the upper lifting seat and the lower lifting seat in the vertical direction, and the two lead screw nuts are installed at the other end of the upper lifting seat and the lower lifting seat.

[0008] By adopting the above technical solution, by rotating the adjusting handwheel, the upper lifting seat and the lower lifting seat can be driven closer to or away from each other through the bidirectional screw and the two screw nuts, so as to drive the upper guide roller and the lower guide roller closer to or away from each other, so as to support and guide the plastic pipes with different diameters.

[0009] The present invention is further configured as follows: the ground support assembly includes a base, a plurality of rollers arranged on the lower surface of the base, two telescopic tubes arranged at both ends of the base, two telescopic arms respectively arranged on the telescopic tubes, a locking knob bolt threadedly connected to the upper end of the telescopic tube and pressed against the circumference of the telescopic arm, and two support sleeves respectively arranged at the upper end of the telescopic arm and sleeved on the corresponding second connecting shaft; during the lifting and lowering process of the lifting frame and the lifting seat below, the telescopic arm is raised and lowered along the telescopic tube to adjust its height.

[0010] By adopting the above technical solution, during the lifting process of the lifting frame and the lower lifting seat, the telescopic arm is lifted and lowered along the telescopic tube to adjust the height, so that the ground support assembly can be supported on the ground.

[0011] A further setting of the present invention is that a chute extending along the vertical direction is provided at the upper end of the telescopic arm. A slider is slidably connected in the chute. A compression spring is provided between the bottom of the chute and the lower surface of the slider. The support sleeve is provided at the upper end of the slider. During the process of the second hinge shaft adjusting its height as the folding frame folds, the slider is always within the chute, and the compression spring is always in an elastically compressed state.

[0012] By adopting the above technical solution, the ground support component is connected to the two second connecting shafts. The lifting of the lifting frame, the lowering of the lower lifting seat, and the folding and unfolding of the folding frame all involve the lifting of the second connecting shaft. Only through the adjustment of the telescopic tube, the telescopic arm, and the locking knob bolt, it is necessary to wait until the final position of the folding frame is determined before fixing it with the locking knob bolt, resulting in a poor ground support effect during the unfolding process of the folding frame; because the adjustment of the lifting frame is adjusted in the early stage, and the initial height of the lower lifting seat can also be determined in the early stage. At this time, the telescopic tube, the telescopic arm, and the locking knob bolt can be adjusted correspondingly after the height of the lifting frame is adjusted; then after adjusting the unfolding length of the folding frame, through the setting of the chute, the slider, and the compression spring, during the process of the second hinge shaft adjusting its height as the folding frame folds, the slider is always within the chute, and the compression spring is always in an elastically compressed state, so as to achieve elastic support for the folding frame.

[0013] A further setting of the present invention is that on the sides of the two telescopic arms away from each other, there are tooth grooves extending along the vertical direction near the chute. On the sides of the two sliders away from each other, there are limiting pieces. The limiting pieces are provided with racks that do not contact the tooth grooves in the natural state corresponding to the tooth grooves; on the end faces of the two sliders close to each other, there are thread sleeves with opposite thread directions respectively. A pull rod is provided between the two thread sleeves. The middle of the pull rod is in a "U" shape and does not interfere with the auxiliary guide roller during rotation. During the rotation of the pull rod, it can drive the two thread sleeves to approach each other so that the tooth grooves and the racks are engaged, and during the movement of the slider, the second connecting shaft always remains in the state of being embedded in the support sleeve.

[0014] By adopting the above technical solution, due to the setting of the chute, the slider, and the compression spring, the second hinge shaft of the folding frame is finally elastically supported, and the support effect is relatively poor. At this time, by rotating the pull rod, during the process of the two thread sleeves approaching each other, the tooth grooves and the racks are engaged. At this time, the support sleeve and the telescopic arm are in a fixed relationship, thereby improving the support stability at the second hinge shaft of the folding frame; at the same time, the setting of the pull rod has the effect of facilitating the pulling of the folding frame to unfold and fold.

[0015] The present invention is further configured as follows: an induced draft fan is provided on the support frame, a tee is provided at the air outlet end of the induced draft fan, the other two joints of the tee are facing both sides of the support frame, a square telescopic ventilation pipe is provided between the tee and the base on the same side, a plurality of air outlets are arranged on the upper surface of the square telescopic ventilation pipe, and the square telescopic ventilation pipe is located below the plastic pipe transmission path.

[0016] By adopting the above technical solution, when the base moves with the expansion or contraction of the folding frame, the square telescopic ventilation duct is also expanded or contracted; at this time, if the guide positioning device is placed at the discharge of the pipe making machine of the plastic pipe production line, the cooling of the plastic pipe can be accelerated by air cooling; if the guide positioning device is placed behind the spray cooling device of the plastic pipe production line, the surface of the plastic pipe can be further dried by air cooling.

[0017] The present invention is further configured as follows: a first multi-section telescopic rod is respectively provided between the support frame and both ends of the base.

[0018] By adopting the above technical solution and setting the first multi-section telescopic rod, the stability of the base during movement can be improved.

[0019] The present invention is further configured as follows: a support rod is provided at the end of each telescopic section of the two first multi-section telescopic rods, two limit rods are provided on the support rod, and the square telescopic ventilation pipe is placed between the multiple support rods and the multiple limit rods.

[0020] By adopting the above technical solution, the provision of multiple support rods and limit rods can limit the square telescopic ventilation tube so that the air outlet of the square telescopic ventilation tube is aligned with the bottom of the plastic tube transmission path.

[0021] The present invention is further configured as follows: a holder having a U-shaped bayonet extending from bottom to bottom is provided on the first connecting shaft, the end of the auxiliary guide roller is rotatably connected to a holder shaft embedded in the U-shaped bayonet, and a second multi-section telescopic rod is provided between two adjacent holders to prevent the holder from rotating at an angle.

[0022] By adopting the above technical solution, during the process of unfolding or folding the folding frame, the distance between adjacent auxiliary guide wheels gradually increases or decreases. At this time, the card shaft of the auxiliary guide wheel is embedded in the U-shaped card slot of the card seat, which is convenient for disassembly and assembly. At this time, if the auxiliary guide rollers are felt to be too dense, some of the detachable auxiliary guide rollers can be used according to the implementation situation.

[0023] The present invention is further configured as follows: both sides of the lower end of the lifting frame are provided with limiting reinforcement sleeves for interference during the lifting and setting process of the installation profile.

[0024] By adopting the above technical solution, the limiting reinforcement sleeve and the mounting profile are slidingly arranged. At this time, the mounting profile can be supported by the limiting reinforcement sleeve, reducing the force at the connection between the support seat and the mounting profile, and improving the overall structural stability of the folding frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of Example 1;

[0026] Figure 2 This is a schematic structural diagram of the embodiment 1 in which the supporting mechanism is eliminated;

[0027] Figure 3 is a structural diagram of the supporting mechanism in Example 1;

[0028] Figure 4 yes Figure 3 Schematic diagram of the structure after omitting the supporting components on the foundation;

[0029] Figure 5 yes Figure 3 A local enlarged view at point A;

[0030] Figure 6 yes Figure 3 A partial enlarged view of position B in the middle;

[0031] Figure 7 It is a structural diagram of Example 2.

[0032] Figure numerals: 1. Support frame; 2. Guide mechanism; 21. Lifting frame; 22. Lifting cylinder; 23. Lifting seat; 24. Upper guide roller; 25. Lower guide roller; 26. Adjustment assembly; 261. Guide shaft; 262. Bidirectional screw; 263. Screw nut; 264. Adjustment hand wheel; 265. Positioning reinforcement sleeve; 3. Support mechanism; 31. Support seat; 32. Mounting profile; 33. Folding frame; 331. First connecting arm; 332. Second connecting arm; 333. Telescopic part; 334. First hinge axis; 335. Second hinge axis; 336. First connecting axis; 337. Second connecting arm Connecting shaft; 34, auxiliary guide roller; 341, clamping shaft; 35, ground support assembly; 351, base; 352, roller; 353, telescopic tube; 354, telescopic arm; 3541, slide groove; 3542, tooth groove; 355, locking knob bolt; 356, support sleeve; 357, slider; 3571, limit plate; 3572, rack; 3573, threaded sleeve; 358, compression spring; 359, pull rod; 4, induced draft fan; 41, tee pipe; 42, square telescopic ventilation duct; 5, first multi-section telescopic rod; 51, support rod; 52, limit rod; 6, clamping seat; 7, second multi-section telescopic rod. DETAILED DESCRIPTION

[0033] The present invention will be further described in detail below with reference to the accompanying drawings.

[0034] Example 1: A plastic pipe production guide and positioning device, such as Figure 1 As shown, it includes a support frame 1, a guide mechanism 2 that is lifted and lowered on the support frame 1, and two supporting mechanisms 3 distributed on the front and back sides of the support frame 1.

[0035] like Figure 1 and Figure 2 As shown, the guide mechanism 2 includes a lifting frame 21 mounted on the support frame 1 for lifting and lowering, a lifting cylinder 22 mounted between the support frame 1 and the lifting frame 21, two lifting seats 23 mounted on the lifting frame 21 for lifting and lowering, an upper guide roller 24 mounted on the lower surface of the upper lifting seat 23, a lower guide roller 25 mounted on the upper surface of the lower lifting seat 23, and an adjustment assembly 26 mounted between the lifting frame 21 and the two lifting seats 23 for driving the two lifting seats 23 toward or away from each other. The adjustment assembly 26 includes a guide shaft 261, a bidirectional lead screw 262 rotatably connected to the lifting frame 21 and having two threaded ends with opposite thread directions, two lead screw nuts 263 mounted on the two threaded ends, and an adjustment handwheel 264 mounted on the upper end of the bidirectional lead screw 262. The guide shaft 261 vertically passes through one end of the upper and lower lifting seats 23, and the two lead screw nuts 263 are mounted on the other ends of the upper and lower lifting seats 23.

[0036] like Figure 1 and Figure 3 As shown, the supporting mechanism 3 includes two support seats 31 arranged at both ends of the side of the lifting seat 23 located below, two mounting profiles 32 respectively arranged on the support seats 31 and arranged along the vertical direction, two folding frames 33 respectively arranged on the mounting profiles 32 and foldable or retractable, a plurality of auxiliary guide rollers 34, and a ground support component 35 arranged on the two folding frames 33 and supporting the ground.

[0037] like Figure 2 and Figure 3 As shown, both sides of the lower end of the lifting frame 21 are provided with limiting reinforcement sleeves 265 for the installation profile 32 to interfere with during the lifting and setting process.

[0038] like Figure 3 and Figure 4As shown, the folding frame 33 includes a plurality of first connecting arms 331 arranged side by side, and a plurality of second connecting arms 332 arranged side by side and respectively intersecting with the plurality of first connecting arms 331. The middle portion of the first connecting arm 331 and the middle portion of the second connecting arm 332 are hinged. The lower end of the first connecting arm 331 is hinged to the lower end of the adjacent second connecting arm 332. The upper end of the first connecting arm 331 is hinged to the upper end of the adjacent second connecting arm 332. The upper end of the first hinged arm close to the mounting profile 32 is hinged to the mounting profile 32. The upper end of the mounting profile 32 and the lower end of the second connecting arm 332, located near the mounting profile 32, are vertically slidably mounted on the mounting profile 32. The folding frame 33 is formed with multiple diamond-shaped telescopic sections 333 hinged at their endpoints. The top hinge of each telescopic section 333 is provided with a first hinge axis 334 hinged to the first connecting arm 331 and the second connecting arm 332. The bottom hinge of each telescopic section 333 is provided with a second hinge axis 335 hinged to the first connecting arm 331 and the second connecting arm 332. In other embodiments, the redundant portions of the first and second connecting arms 331, 332 at the ends are omitted.

[0039] like Figures 2 to 5 As shown, a first connecting shaft 336 is provided at the ends of the first hinge axes 334 of the corresponding telescopic portions 333 of the two folding frames 33, which are closer to each other. Both ends of the auxiliary guide rollers 34 are positioned between the two corresponding first connecting shafts 336. The rotation axes of the lower guide roller 25 and the auxiliary guide rollers 34 are at the same height, and the plastic pipe extends in a straight line when resting on the lower guide roller 25 and the multiple auxiliary guide rollers 34. A second connecting shaft 337 is provided at the ends of the second hinge axes 335 of the telescopic portions 333 of the two folding frames 33, which are farther away from the mounting profile 32. The ground support assembly 35 is positioned between the two second connecting shafts 337. During the raising and lowering of the lifting frame 21 and the lower lifting base 23, the ground support assembly 35 can remain supported on the ground and in an upright position.

[0040] like Figure 3 and Figure 5 As shown, a holder 6 with a U-shaped bayonet extending from bottom to bottom is provided on the first connecting shaft 336, and the end of the auxiliary guide roller 34 is rotatably connected to a holder shaft 341 embedded in the U-shaped bayonet, and a second multi-section telescopic rod 7 is provided between two adjacent holders 6 to prevent the holders 6 from rotating at an angle.

[0041] As shown in FIG. 3, the ground support component 35 includes a base 351, a plurality of rollers 352 provided on the lower surface of the base 351, two telescopic tubes 353 provided at both ends of the base 351, two telescopic arms 354 respectively provided on the telescopic tubes 353, a locking knob bolt 355 threadedly connected to the upper end of the telescopic tube 353 and abutting against the circumferential side of the telescopic arm 354, and two support sleeves 356 respectively provided on the upper ends of the telescopic arms 354 and sleeved on the corresponding second connecting shafts 337; during the lifting and lowering of the lifting frame 21 and the lower lifting seat 23, the telescopic arm 354 is lifted and lowered along the telescopic tube 353 for height adjustment.

[0042] As Figure 3 and Figure 6 shown, a chute 3541 extending in the vertical direction is provided at the upper end of the telescopic arm 354. A slider 357 is slidably connected in the chute 3541. A compression spring 358 is provided between the bottom of the chute 3541 and the lower surface of the slider 357. The support sleeve 356 is provided at the upper end of the slider 357. During the process of the second hinge shaft 335 adjusting the height as the folding frame 33 folds, the slider 357 is always within the chute 3541, and the compression spring 358 is always in an elastically compressed state. On the side where the two telescopic arms 354 are away from each other, a tooth groove 3542 extending in the vertical direction and close to the chute 3541 is provided. On the side where the two sliders 357 are away from each other, a limiting piece 3571 is provided. A rack 3572 that does not contact the tooth groove 3542 in the natural state is provided at the position corresponding to the tooth groove 3542 on the limiting piece 3571; on the end faces where the two sliders 357 are close to each other, threaded sleeves 3573 with opposite thread directions are respectively provided. A pull rod 359 is provided between the two threaded sleeves 3573. The middle of the pull rod 359 is in a "U" shape and does not interfere with the auxiliary guide roller 34 during rotation. During the rotation of the pull rod 359, the two threaded sleeves 3573 can be driven to approach each other so that the tooth groove 3542 and the rack 3572 are engaged, and during the movement of the slider 357, the second connecting shaft 337 always remains in the state of being embedded in the support sleeve 356.

[0043] Implementation effect: Because the centerline heights of different types of plastic pipes processed by the pipe making machine are all the same (the centerline heights of the corresponding processing molds are the same), when guiding and positioning the plastic pipes, the lifting frame 21 is first driven to rise and fall by the lifting cylinder 22 so that the centers of the upper guide roller 24 and the lower guide roller 25 are at the heights of the centerlines of the different types of plastic pipes, and the height between the upper guide roller 24 and the lower guide roller 25 is slightly larger than the diameter of the plastic pipe through the adjustment component 26. Then, when the plastic pipe passes through and rests on the lower guide roller 25, the upper guide roller 24 and the lower guide roller 25 are brought closer together so that they contact the top and bottom of the plastic pipe. Then, the unfolded length of the folding frame 33 is adjusted to provide good support for the suspended portion of the plastic pipe according to the on-site installation conditions, thereby solving the problem of sagging deformation of the plastic pipe. At the same time, during the lifting and lowering process of the lifting frame 21 and the lower lifting seat 23, the ground support component 35 can remain supported on the ground and can remain in a vertical state, thereby improving the stability of the supporting mechanism 3 during use.

[0044] The ground support assembly 35 is connected to the two second connecting shafts 337. The lifting and lowering of the lifting frame 21, the lower lifting seat 23, and the folding and unfolding of the folding frame 33 all involve the lifting and lowering of the second connecting shaft 337. Only by adjusting the telescopic tube 353, the telescopic arm 354 and the locking knob bolt 355, it is necessary to wait until the final position of the folding frame 33 is determined before it can be fixed by the locking knob bolt 355, resulting in a poor ground support effect during the unfolding of the folding frame 33. Because the adjustment of the lifting frame 21 is adjusted in the early stage, the initial position of the lower lifting seat 23 is not adjusted. The initial height can also be determined in advance. At this time, the telescopic tube 353, the telescopic arm 354 and the locking knob bolt 355 can be adjusted accordingly after the height of the lifting frame 21 is adjusted; then, after adjusting the unfolded length of the folding frame 33, through the setting of the slide groove 3541, the slider 357 and the compression spring 358, the second hinge shaft 335 is adjusted in height as the folding frame 33 is folded. In this process, the slider 357 is in the slide groove 3541 and the compression spring 358 is in an elastically compressed state, so as to realize elastic support for the folding frame 33.

[0045] Due to the setting of the slide groove 3541, the slider 357, and the compression spring 358, the second hinge shaft 335 of the folding frame 33 is ultimately elastically supported, and the supporting effect is relatively poor. At this time, by rotating the pull rod 359, the tooth groove 3542 and the rack 3572 are engaged with each other as the two threaded sleeves 3573 approach each other. At this time, the support sleeve 356 and the telescopic arm 354 are in a fixed relationship, thereby improving the support stability of the second hinge shaft 335 of the folding frame 33; at the same time, the setting of the pull rod 359 has the effect of facilitating the pulling of the folding frame 33 to expand and fold.

[0046] Example 2: A plastic pipe production guide and positioning device, such as Figure 7As shown, the difference from Example 1 is that an induced draft fan 4 is provided on the support frame 1. The outlet end of the induced draft fan 4 is provided with a tee 41. The other two joints of the tee 41 face the sides of the support frame 1. A square telescopic ventilation tube 42 is provided between the tee 41 and the base 351 on the same side. The upper surface of the square telescopic ventilation tube 42 is arranged with multiple air outlets (not marked in the figure). The square telescopic ventilation tube 42 is located below the plastic tube transmission path. Furthermore, a first multi-section telescopic rod 5 is provided between the support frame 1 and the base 351 at each end. Each telescopic section 333 of the two first multi-section telescopic rods 5 is provided with a support rod 51. The support rod 51 is provided with two limit rods 52. The square telescopic ventilation tube 42 is placed between the multiple support rods 51 and the multiple limit rods 52.

[0047] Implementation Effect: When the base 351 moves with the expansion or contraction of the folding frame 33, the square telescopic ventilation tube 42 also expands or contracts. At this time, if the guide positioning device is placed at the discharge of the pipe making machine in the plastic pipe production line, the cooling of the plastic pipe can be accelerated by air cooling. If the guide positioning device is placed behind the spray cooling device of the plastic pipe production line, the surface of the plastic pipe can be further dried by air cooling. The provision of the first multi-section telescopic rod 5 can improve the stability of the base 351 during movement. The provision of multiple support rods 51 and limit rods 52 can limit the square telescopic ventilation tube 42 so that the air outlet of the square telescopic ventilation tube 42 is aligned below the plastic pipe transmission path.

[0048] This specific embodiment is merely an explanation of the present invention and is not intended to limit the present invention. After reading this specification, those skilled in the art may make non-creative modifications to this embodiment as needed. However, as long as such modifications are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A plastic pipe production guide and positioning device, comprising a support frame (1), a guide mechanism (2) arranged to be lifted and lowered on the support frame (1), and two supporting mechanisms (3) located on the front and rear sides of the support frame (1), characterized in that: The guide mechanism (2) includes a lifting frame (21) that is lifted and lowered on the support frame (1), a lifting cylinder (22) that is set between the support frame (1) and the lifting frame (21), two lifting seats (23) that are lifted and lowered on the lifting frame (21), an upper guide roller (24) that is set on the lower surface of the upper lifting seat (23), a lower guide roller (25) that is set on the upper surface of the lower lifting seat (23), and an adjustment component (26) that is set between the lifting frame (21) and the two lifting seats (23) and drives the two lifting seats (23) to move closer to or away from each other; the supporting mechanism (3) includes two support seats (31) that are set at both ends of the side of the lower lifting seat (23), two mounting profiles (32) that are respectively set on the support seats (31) and are arranged along the vertical direction, two folding frames (33) that are respectively set on the mounting profiles (32) and can be folded or retracted, a plurality of auxiliary guide rollers (34), and a ground support component (35) that is set on the two folding frames (33) and supports the ground. The folding frame (33) includes a plurality of first connecting arms (331) arranged side by side, and a plurality of second connecting arms (332) arranged side by side and respectively intersecting the plurality of first connecting arms (331). The middle portion of the first connecting arm (331) and the middle portion of the second connecting arm (332) are hinged. The lower end of the first connecting arm (331) is hinged to the lower end of the adjacent second connecting arm (332). The upper end of the first connecting arm (331) is hinged to the upper end of the adjacent second connecting arm (332). The upper end of the first hinged arm close to the mounting profile (32) is hinged to the mounting profile. The upper end of the second connecting arm (332) close to the mounting profile (32) is slidably arranged on the mounting profile (32) along the vertical direction. The folding frame (33) is formed with a plurality of telescopic parts (333) in a "diamond shape" and hinged at the end points. The top hinge of the telescopic part (333) is provided with a first hinge shaft (334) hinged to the first connecting arm (331) and the second connecting arm (332). The bottom hinge of the telescopic part (333) is provided with a second hinge shaft (335) hinged to the first connecting arm (331) and the second connecting arm (332). A first connecting shaft (336) is provided at one end of the first hinge shafts (334) of the telescopic parts (333) corresponding to the two folding frames (33) that are close to each other, and both ends of the auxiliary guide roller (34) are provided between the two corresponding first connecting shafts (336). The rotation axes of the lower guide roller (25) and the auxiliary guide roller (34) are at the same height, and the plastic pipe extends in a straight line when placed on the lower guide roller (25) and the plurality of auxiliary guide rollers (34); At the ends of the second hinge shafts (335) of the telescopic parts (333) of the two folding frames (33) far from the mounting profile (32) that are away from each other, a second connecting shaft (337) is provided. The ground support assembly (35) is arranged between the two second connecting shafts (337), and during the lifting and lowering of the lifting frame (21) and the lower lifting seat (23), the ground support assembly (35) can maintain a state of being supported on the ground and can maintain a vertical state; The ground support assembly (35) includes a base (351), a plurality of rollers (352) arranged on the lower surface of the base (351), two telescopic tubes (353) arranged at both ends of the base (351), two telescopic arms (354) respectively arranged on the telescopic tubes (353), a locking knob bolt (355) threadedly connected to the upper end of the telescopic tube (353) and abutting against the circumferential side of the telescopic arm (354), and two support sleeves (356) respectively arranged at the upper ends of the telescopic arms (354) and sleeved on the corresponding second connecting shafts (337); during the lifting and lowering of the lifting frame (21) and the lower lifting seat (23), the telescopic arm (354) lifts and lowers along the telescopic tube (353) for height adjustment; At the upper end of the telescopic arm (354), a chute (3541) extending in the vertical direction is provided. A slider (357) is slidably connected in the chute (3541). A compression spring (358) is arranged between the bottom of the chute (3541) and the lower surface of the slider (357). The support sleeve (356) is arranged at the upper end of the slider (357). During the process of the second hinge shaft (335) adjusting its height as the folding frame (33) folds, the slider (357) is always in the chute (3541), and the compression spring (358) is always in an elastically compressed state; On the sides of the two telescopic arms (354) away from each other, a tooth groove (3542) close to the chute (3541) and extending in the vertical direction is provided. On the sides of the two sliders (357) away from each other, a limiting piece (3571) is provided. At the position corresponding to the tooth groove (3542) of the limiting piece (3571), a rack (3572) that does not contact the tooth groove (3542) in the natural state is provided; on the end faces of the two sliders (357) close to each other, threaded sleeves (3573) with opposite thread directions are respectively provided. A pull rod (359) is arranged between the two threaded sleeves (3573). The middle of the pull rod (359) is in a "U" shape and does not interfere with the auxiliary guide roller (34) during rotation. During the rotation of the pull rod (359), it can drive the two threaded sleeves (3573) to approach each other so that the tooth groove (3542) and the rack (3572) are engaged, and during the movement of the slider (357), the second connecting shaft (337) always maintains a state of being embedded in the support sleeve (356).

2. A plastic pipe production guiding and positioning device according to claim 1, characterized in that: The adjustment assembly (26) includes a guide shaft (261), a bidirectional lead screw (262) rotatably connected to the lifting frame (21) and having two threaded ends with opposite thread directions, two lead screw nuts (263) respectively arranged on the two threaded ends, and an adjustment hand wheel (264) arranged at the upper end of the bidirectional lead screw (262), wherein the guide shaft (261) passes through one end of the upper lifting seat (23) and the lower lifting seat (23) in the vertical direction, and the two lead screw nuts (263) are installed at the other end of the upper lifting seat (23) and the lower lifting seat (23).

3. A plastic pipe production guiding and positioning device according to claim 2, characterized in that: An induced draft fan (4) is provided on the support frame (1), and a three-way pipe (41) is provided at the air outlet end of the induced draft fan (4), and the other two joints of the three-way pipe (41) face the two sides of the support frame (1). A square telescopic ventilation pipe (42) is provided between the three-way pipe (41) and the base (351) on the same side, and a plurality of air outlets are arranged on the upper surface of the square telescopic ventilation pipe (42), and the square telescopic ventilation pipe (42) is located below the plastic pipe transmission path.

4. A plastic pipe production guiding and positioning device according to claim 3, characterized in that: A first multi-section telescopic rod (5) is respectively provided between the two ends of the support frame (1) and the base (351).

5. A plastic pipe production guiding and positioning device according to claim 4, characterized in that: The ends of each telescopic section (333) of the two first multi-section telescopic rods (5) are provided with a support rod (51), two limit rods (52) are provided on the support rod (51), and the square telescopic ventilation pipe (42) is placed between the multiple support rods (51) and the multiple limit rods (52).

6. The plastic pipe production guiding and positioning device according to claim 1, characterized in that: A holder (6) having a U-shaped bayonet extending downward is provided on the first connecting shaft (336); the end of the auxiliary guide roller (34) is rotatably connected to a holder shaft (341) embedded in the U-shaped bayonet; and a second multi-section telescopic rod (7) is provided between two adjacent holders (6) to prevent the holders (6) from rotating at different angles.

7. The plastic pipe production guiding and positioning device according to claim 1, characterized in that: Position limiting reinforcement sleeves (265) are provided on both sides of the lower end of the lifting frame (21) for resisting the installation profile (32) during the lifting and setting process.

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