Thermoplastic pipe blank preheater

Abstract

The utility model discloses a pipe blank preheater for a thermoplastic pipe. Belongs to the technical field of thermoplastic pipe production equipment, and comprises a preheating frame, a positioning assembly arranged in the preheating frame and used for fixing a pipe blank, and a preheating assembly arranged in the preheating frame and used for preheating, according to the pipe blank preheating device, when a pipe blank needs to be preheated, the pipe blank is connected to the fixing cylinder in a sleeved mode, then the installing shaft is rotated to drive the abutting blocks to rotate, the abutting blocks are arranged on the fixing cylinder, and the abutting blocks are arranged on the abutting blocks in a circumferential array mode by taking the central axis of the installing shaft as the center. The abutting blocks can drive the abutting balls and the connecting rods to move towards the position away from the central axis of the mounting shaft in the rotating process, so that the fixing diameter is enlarged, pipe blanks of different diameters can be fixed conveniently, and the pipe blanks of different models can be fixed conveniently.

Description

Technical Field

[0001] The utility model belongs to the technical field of thermoplastic pipe production equipment. Specifically, it relates to a preheater for thermoplastic pipe blanks. Background Art

[0002] In the production process of thermoplastic pipes, the preheating of pipe blanks is a crucial step. Preheating can soften the pipe blanks and facilitate subsequent processing operations.

[0003] The existing Chinese patent (Application No.: CN98211255.6) proposes that the preheater for injection stretch blow molded plastic preforms consists of a heat preservation barrel and a cover plate on the top of the barrel to form a preheating chamber. There is a hot gas as a heat conduction medium flowing forcibly in the preheating chamber. Pipe blank placement holes are evenly opened on the cover plate on the top of the barrel, and a pipe blank neck clamp for hanging the pipe blank in the preheating chamber is arranged in the holes. Using the forcibly flowing hot gas as a heat conduction medium, its unique structural setting can be widely applied to the preheating of various raw material preforms including PET, PC, and PE. Its uniform temperature field in a sufficiently large range can meet the preheating requirements of any capacity preforms, and the preheating time is greatly shortened.

[0004] During the use of the above device, the pipe blank to be preheated is placed in the pipe blank neck clamp to fix the pipe blank. However, since there is no effective adjustment component in the pipe blank neck clamp of the above device, each time different types of pipe blanks are fixed, the pipe blank neck clamp needs to be replaced again, which will undoubtedly reduce the working efficiency.

[0005] In view of this, this application is specifically proposed. Summary of the Utility Model

[0006] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a preheater for thermoplastic pipe blanks, achieving the purpose of clamping and fixing different pipe blanks.

[0007] To solve the above technical problem, a preheater for thermoplastic pipe blanks provided by the utility model includes:

[0008] A preheating frame;

[0009] A positioning component arranged in the preheating frame for fixing the pipe blank;

[0010] A preheating component arranged in the preheating frame for preheating;

[0011] The positioning component includes a fixed cylinder connected to the preheating frame. A mounting shaft is rotatably connected inside the fixed cylinder. A plurality of abutting blocks are connected to the mounting shaft, and the abutting blocks are distributed in a circumferential array centered on the central axis of the mounting shaft. An abutting ball that cooperates with and abuts against the abutting blocks is arranged inside the fixed cylinder. One side of the abutting ball is connected to a connecting rod, and one end of the connecting rod extends to the outside of the fixed cylinder. A compression spring is sleeved on the connecting rod, and the two ends of the compression spring are respectively connected to one side of the abutting ball and the inner wall of the fixed cylinder.

[0012] Further, one end of the connecting rod is connected to an abutting airbag, and one side of the abutting airbag is connected to an inflation tube. The shape of the abutting block is arc-shaped, and at least four of the abutting blocks form a set of abutting members. At least two sets of abutting members are arranged inside the fixed cylinder.

[0013] Further, a fixed frame is connected to the fixed cylinder. One end of the mounting shaft extends to the outside of the fixed frame and is connected to a positioning plate. One side of the fixed frame is threadedly connected with a transmission bolt, and one end of the transmission bolt is rotatably connected to a positioning ring for limiting the positioning plate.

[0014] Further, two symmetrically arranged guide rods are connected to one side of the positioning ring. The guide rods are slidably connected inside the fixed frame. A connection port adapted to the guide rods is opened on the fixed frame. Anti-slip particles are integrally formed on the opposite sides of the positioning plate and the positioning ring.

[0015] Further, the preheating component includes a heating resistance wire connected inside the preheating frame for generating heat. A servo motor is slidably arranged inside the preheating frame. The driving end of the servo motor is connected to a connecting shaft. One end of the connecting shaft is connected to a fan blade. A driving gear is connected to the connecting shaft. A fixed rack that meshes with the driving gear is connected inside the preheating frame.

[0016] Further, the bottom of the servo motor is connected to a sliding plate. The sliding plate is slidably connected to the inner bottom wall of the preheating frame. A sliding groove adapted to the sliding plate is opened on the inner bottom wall of the preheating frame. A filter screen plate is connected inside the preheating frame.

[0017] After adopting the above technical solution, the present utility model has the following beneficial effects compared with the prior art.

[0018] 1. In the present utility model, when it is necessary to preheat the tube blank, the tube blank is sleeved on the fixed cylinder, and then the mounting shaft is rotated to drive the plurality of abutting blocks to rotate. During the rotation of the plurality of abutting blocks, the plurality of abutting balls and the connecting rod can be driven to move away from the position of the central axis of the mounting shaft, so as to expand the fixing diameter and facilitate the fixing of tube blanks with different diameters. This setting facilitates the fixing of tube blanks of different models.

[0019] 2. In the present utility model, the heating resistance wire is activated to generate heat, and then the servo motor is activated to drive the fan blade to rotate, transferring the heat generated by the heating resistance wire into the preheating frame. During the startup process of the servo motor, the driving gear can be driven to rotate, causing the driving gear to move horizontally on the fixed rack, thereby driving the fan blade to move. This setting ensures uniform temperature distribution within the preheating frame and guarantees the uniformity of the preheating of the pipe blanks within the preheating frame. Description of the Drawings

[0020] The drawings, as a part of the present utility model, are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof are used to explain the present utility model, but do not constitute an improper limitation to the present utility model. Obviously, the drawings described below are only some embodiments. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. In the drawings:

[0021] Figure 1 It is a schematic diagram of the overall structure of a preheater for thermoplastic pipe blanks;

[0022] Figure 2 It is a schematic diagram of the internal structure of a preheater for thermoplastic pipe blanks;

[0023] Figure 3 It is a sectional view of a preheater for thermoplastic pipe blanks;

[0024] Figure 4 It is a schematic diagram of the connection structure of the positioning plate and the positioning ring in a preheater for thermoplastic pipe blanks;

[0025] Figure 5 It is a schematic diagram of the connection structure of the positioning components in a preheater for thermoplastic pipe blanks.

[0026] Reference numerals in the figures: 1, preheating frame; 2, positioning components; 201, fixed cylinder; 202, mounting shaft; 203, abutting block; 204, abutting ball; 205, connecting rod; 206, compression spring; 3, abutting airbag; 4, fixed frame; 5, positioning plate; 6, transmission bolt; 7, positioning ring; 8, guide rod; 9, preheating components; 901, heating resistance wire; 902, servo motor; 903, fan blade; 904, driving gear; 905, fixed rack; 10, filter mesh plate.

[0027] It should be noted that these drawings and text descriptions are not intended to limit the scope of the concept of the present utility model in any way, but to illustrate the concept of the present utility model to those skilled in the art by referring to specific embodiments. Detailed Embodiments

[0028] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments in conjunction with the accompanying drawings in the embodiments of the present utility model. The following embodiments are used to illustrate the present utility model but not to limit the scope of the present utility model.

[0029] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model 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, and therefore should not be construed as a limitation of the present utility model.

[0030] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0031] As Figures 1 to 5 shown, the present utility model provides a preheater for a thermoplastic pipe blank.

[0032] Specifically, as Figures 1 - 5 given, it includes:

[0033] A preheating frame 1;

[0034] A positioning assembly 2 disposed in the preheating frame 1 for fixing the pipe blank;

[0035] A preheating assembly 9 disposed in the preheating frame 1 for preheating;

[0036] The positioning assembly 2 includes a fixed cylinder 201 connected to the preheating frame 1. A mounting shaft 202 is rotatably connected in the fixed cylinder 201. A plurality of abutting blocks 203 are connected to the mounting shaft 202. The abutting blocks 203 are circumferentially arranged around the central axis of the mounting shaft 202. Abutting balls 204 that cooperate with and abut against the abutting blocks 203 are disposed in the fixed cylinder 201. One side of the abutting ball 204 is connected to a connecting rod 205. One end of the connecting rod 205 extends to the outside of the fixed cylinder 201. A compression spring 206 is sleeved on the connecting rod 205. The two ends of the compression spring 206 are respectively connected to one side of the abutting ball 204 and the inner wall of the fixed cylinder 201.

[0037] It should be noted that a sealing door is hinged to one side of the preheating frame 1.

[0038] In the present utility model, when it is necessary to preheat the tube blank, the tube blank is sleeved on the fixed cylinder 201, and then the installation shaft 202 is rotated to drive a plurality of abutting blocks 203 to rotate. During the rotation of the plurality of abutting blocks 203, a plurality of abutting balls 204 and the connecting rod 205 can be driven to move away from the central axis of the installation shaft 202, thereby expanding the fixed diameter to facilitate the fixation of tube blanks with different diameters.

[0039] Further, as a specific embodiment of the present utility model, the present utility model provides a preheater for a thermoplastic tube blank.

[0040] Specifically, as Figure 5 shown, one end of the connecting rod 205 is connected with an abutting airbag 3, one side of the abutting airbag 3 is connected with an inflation tube, the shape of the abutting block 203 is arc-shaped, at least four abutting blocks 203 are a set of abutting members, and at least two sets of abutting members are arranged in the fixed cylinder 201.

[0041] In the present utility model, the abutting airbag 3 is provided, and by utilizing the relatively soft characteristic of the abutting airbag 3, a certain degree of freedom is given to the tube blank to reduce the deformation caused by restraint. The multiple sets of abutting members provided improve the stability of the fixation of the tube blank.

[0042] Further, as another specific embodiment of the present utility model, the present utility model provides a preheater for a thermoplastic tube blank.

[0043] Specifically, as Figure 4 shown, a fixed frame 4 is connected to the fixed cylinder 201, one end of the installation shaft 202 extends to the outside of the fixed frame 4 and is connected with a positioning plate 5, one side of the fixed frame 4 is threadedly connected with a transmission bolt 6, and one end of the transmission bolt 6 is rotatably connected with a positioning ring 7 for limiting the positioning plate 5.

[0044] In the present utility model, after the position adjustment of the installation shaft 202 is completed, the transmission bolt 6 can be rotated to drive the positioning ring 7 to move horizontally to fix the positioning plate 5 and the installation shaft 202.

[0045] Further, as another specific embodiment of the present utility model, the present utility model provides a preheater for a thermoplastic tube blank.

[0046] Specifically, as Figure 4 shown, two symmetrically arranged guide rods 8 are connected to one side of the positioning ring 7, the guide rods 8 are slidably connected in the fixed frame 4, connection ports adapted to the guide rods 8 are opened on the fixed frame 4, and anti-slip particles are integrally formed on the opposite sides of the positioning plate 5 and the positioning ring 7.

[0047] In the present utility model, this setting can provide a limiting and guiding effect for the sliding of the positioning ring 7, and improve the stability of the positioning ring 7 during the sliding process.

[0048] Further, as another specific embodiment of the present utility model, the present utility model provides a preheater for a thermoplastic pipe blank.

[0049] Specifically, as shown in Figure 2 and Figure 3 , the preheating assembly 9 includes a heating resistance wire 901 connected in the preheating frame 1 for generating heat. A servo motor 902 is slidably provided in the preheating frame 1. The driving end of the servo motor 902 is connected to a connecting shaft. One end of the connecting shaft is connected to a fan blade 903. A driving gear 904 is connected to the connecting shaft. A fixed rack 905 meshing with the driving gear 904 is connected in the preheating frame 1.

[0050] It should be noted that an air inlet is provided on one side of the preheating frame 1.

[0051] In the present utility model, in order to facilitate uniform heating of the pipe blank in the preheating frame 1, the preheating assembly 9 is designed. The heating resistance wire 901 is started to generate heat. Subsequently, the servo motor 902 is started to drive the fan blade 903 to rotate, and the heat generated by the heating resistance wire 901 is transferred into the preheating frame 1. During the start of the servo motor 902, the driving gear 904 can be driven to rotate, so that the driving gear 904 moves horizontally on the fixed rack 905, thereby driving the fan blade 903 to move, making the temperature distribution in the preheating frame 1 uniform and ensuring the uniform preheating degree of the pipe blank in the preheating frame 1.

[0052] Further, as another specific embodiment of the present utility model, the present utility model provides a preheater for a thermoplastic pipe blank.

[0053] Specifically, as shown in Figure 2 , the bottom of the servo motor 902 is connected to a sliding plate. The sliding plate is slidably connected to the inner bottom wall of the preheating frame 1. A sliding groove adapted to the sliding plate is opened on the inner bottom wall of the preheating frame 1. A filter screen plate 10 is connected in the preheating frame 1.

[0054] In the present utility model, the provided sliding plate facilitates the sliding of the servo motor 902, and the provided filter screen plate 10 prevents the pipe blank from directly falling on the fan blade 903 and damaging the equipment when the pipe blank accidentally drops.

[0055] Working principle: When the pipe blank needs to be preheated, the pipe blank is sleeved on the fixed cylinder 201. Subsequently, the mounting shaft 202 is rotated to drive a plurality of abutting blocks 203 to rotate. During the rotation of the plurality of abutting blocks 203, a plurality of abutting balls 204 and connecting rods 205 can be driven to move away from the central axis of the mounting shaft 202, thereby expanding the fixing diameter to facilitate the fixing of pipe blanks with different diameters;

[0056] To facilitate the uniform heating of the billet in the preheating frame 1, a preheating component 9 is designed. The heating resistance wire 901 is started to generate heat, and then the servo motor 902 is started to drive the fan blade 903 to rotate, transferring the heat generated by the heating resistance wire 901 into the preheating frame 1. During the startup process of the servo motor 902, the driving gear 904 can be driven to rotate, causing the driving gear 904 to move horizontally on the fixed rack 905, thereby driving the fan blade 903 to move, making the temperature distribution in the preheating frame 1 uniform and ensuring the uniformity of the billet preheating in the preheating frame 1.

[0057] The above description is only a preferred embodiment of the present invention and does not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art of this patent, without departing from the scope of the technical solution of the present invention, can make some changes or modifications using the technical content prompted above to form equivalent embodiments of equivalent changes. The implementation schemes in the above embodiments can also be further combined or replaced. However, as long as the content does not depart from the technical solution of the present invention, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the present invention's solution.

Claims

1. A thermoplastic tube preheater, comprising: Preheating frame (1); A positioning component (2) disposed in the preheating frame (1) and used for fixing the tube blank; A preheating component (9) disposed in the preheating frame (1) for preheating; The invention is characterized in that the positioning assembly (2) comprises a fixed cylinder (201) connected to the preheating frame (1), the fixed cylinder (201) is rotatably connected with a mounting shaft (202), a plurality of abutment blocks (203) are connected to the mounting shaft (202), the abutment blocks (203) are distributed in a circular array with the central axis of the mounting shaft (202) as the center, a abutment ball (204) is arranged in the fixed cylinder (201) for use with the abutment blocks (203) and abutting against each other, a connecting rod (205) is connected to one side of the abutment ball (204), one end of the connecting rod (205) extends to the outside of the fixed cylinder (201), a compression spring (206) is sleeved on the connecting rod (205), and the two ends of the compression spring (206) are respectively connected to one side of the abutment ball (204) and the inner wall of the fixed cylinder (201).

2. A thermoplastic tube preheater according to claim 1, characterized in that: One end of the connecting rod (205) is connected to a resistance airbag (3), one side of the resistance airbag (3) is connected to an inflation tube, the resistance block (203) is arc-shaped, at least four of the resistance blocks (203) form a group of resistance pieces, and at least two groups of resistance pieces are arranged in the fixed tube (201).

3. A thermoplastic tube preheater according to claim 1, characterized in that: The fixing tube (201) is connected to a fixing frame (4), one end of the mounting shaft (202) extends to the outside of the fixing frame (4) and is connected to a positioning plate (5), one side of the fixing frame (4) is threadedly connected to a transmission bolt (6), and one end of the transmission bolt (6) is rotatably connected to a positioning ring (7) for limiting the positioning plate (5).

4. A thermoplastic tube preheater according to claim 3, characterized in that: One side of the positioning ring (7) is connected to two mutually symmetrical guide rods (8), the guide rods (8) are slidably connected in the fixed frame (4), and the fixed frame (4) is provided with a connection port adapted to the guide rods (8), and the opposite sides of the positioning plate (5) and the positioning ring (7) are integrally formed with anti-skid particles.

5. A thermoplastic tube preheater according to claim 1, characterized in that: The preheating assembly (9) comprises a heating resistance wire (901) connected to a preheating frame (1) for generating heat, a servo motor (902) is slidably arranged in the preheating frame (1), a driving end of the servo motor (902) is connected to a connecting shaft, one end of the connecting shaft is connected to a fan blade (903), a driving gear (904) is connected to the connecting shaft, and a fixed rack (905) meshing with the driving gear (904) is connected to the preheating frame (1).

6. A thermoplastic tube preheater according to claim 5, characterized in that: A slide plate is connected to the bottom of the servo motor (902), and the slide plate is slidably connected to the inner bottom wall of the preheating frame (1). A slide groove adapted to the slide plate is provided on the inner bottom wall of the preheating frame (1), and a filter screen plate (10) is connected inside the preheating frame (1).

Images