Non-pressure silicon carbide extrusion molding pipe blank connecting device

Abstract

The utility model belongs to the technical field of pipe extrusion processes, and discloses a non-pressure silicon carbide extrusion molding pipe blank receiving device which comprises a blank receiving pipe, a heating pipe is arranged at the feeding end of the blank receiving pipe, the heating pipe and the blank receiving pipe are coaxially arranged, and a molding pipe can be heated and cured when passing through the heating pipe. The heating pipe is arranged at the feeding end of the blank receiving pipe, so that a formed pipe can be heated in the heating pipe before entering the blank receiving pipe, water on the surface of the formed pipe is lost to be in a semi-solidified state, the strength of the solidified formed pipe can overcome the effect of self gravity, and the forming pipe is prevented from being damaged. And therefore, deformation of the formed pipe in the blank receiving pipe is avoided, and the forming quality of the formed pipe is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe extrusion technology, in particular to a pressureless silicon carbide extrusion molding pipe blank connecting device. Background Art

[0002] When the pressureless silicon carbide tube is extruded, the tube wall is thin and the water content is high. After extrusion, it is generally in a plastic state. The tube can easily undergo elliptical deformation under its own gravity, affecting the molding quality. Utility Model Content

[0003] The utility model aims to provide a pressureless silicon carbide extrusion forming pipe blank joining device to solve the problem that the pipe is easy to deform and improve the quality of the pipe.

[0004] To achieve this purpose, the utility model adopts the following technical solutions:

[0005] The invention discloses a pressureless silicon carbide extrusion molding pipe material splicing device, comprising a splicing pipe, a heating pipe is arranged at the feeding end of the splicing pipe, the heating pipe is coaxially arranged with the splicing pipe, and the molded pipe can be heated and solidified when passing through the heating pipe.

[0006] In some embodiments, an infrared heater is provided outside the heating tube.

[0007] In some embodiments, the heating tube has a U-shaped cross section or a circular cross section, and the bottom end of the U-shaped cross section is semicircular.

[0008] In some embodiments, a first vent is provided on the lower tube wall of the heating tube, and the air intake airflow at the first vent can suspend the shaped tube in the heating tube so that the heating tube does not contact the shaped tube.

[0009] In some embodiments, the length of the heating tube is shorter than the length of the connecting tube.

[0010] In some embodiments, the cross-section of the connecting tube is circular.

[0011] In some embodiments, the inner diameter D1 of the blank connecting tube is larger than the outer diameter d of the formed tube, and D1-d is not larger than 0.5 mm.

[0012] In some embodiments, the inner diameter D2 of the heating tube is larger than the inner diameter D1 of the connecting tube.

[0013] In some embodiments, a second vent is provided on the lower tube wall of the blank connecting tube, and the air intake at the second vent can suspend the formed tube in the blank connecting tube.

[0014] In some embodiments, a plurality of first vents are provided, and the plurality of first vents are spaced apart along the long axis direction of the heating tube, and an area where the plurality of first vents are provided on the lower tube wall of the heating tube does not exceed the height of the long axis of the heating tube; a plurality of second vents are provided, and the plurality of second vents are spaced apart along the long axis direction of the connecting tube, and an area where the plurality of second vents are provided on the lower tube wall of the connecting tube does not exceed the height of the long axis of the connecting tube.

[0015] Beneficial effects of the utility model:

[0016] The utility model provides a pressureless silicon carbide extrusion molding pipe connecting device, by arranging a heating pipe at the feeding end of the connecting pipe, so that the molded pipe can be heated in the heating pipe before entering the connecting pipe, so that the surface moisture of the molded pipe is lost and it becomes a semi-solidified state. The strength of the solidified molded pipe can overcome the effect of its own gravity, thereby avoiding deformation of the molded pipe in the connecting pipe, which is beneficial to improving the molding quality of the molded pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional view of the pressureless silicon carbide extrusion molding pipe blank joining device provided by the utility model;

[0018] Figure 2 This is a schematic diagram of the cross-sectional structure of the heating tube in the pressureless silicon carbide extrusion molding tube blank joining device provided by the utility model Figure 1 ;

[0019] Figure 3 This is a schematic diagram of the cross-sectional structure of the heating tube in the pressureless silicon carbide extrusion molding tube blank joining device provided by the utility model Figure 2 ;

[0020] Figure 4 The utility model discloses a schematic diagram of the cross-sectional structure of a pipe for connecting a blank in a pressureless silicon carbide extrusion molding pipe connecting device.

[0021] In the figure:

[0022] 100. Formed pipes;

[0023] 1. Connect the blank tube; 11. Second vent;

[0024] 2. Heating tube; 21. First vent. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0026] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0028] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0029] The utility model provides a pressureless silicon carbide extrusion molding pipe blank joining device, such as Figure 1 As shown, it includes a connecting tube 1. In the prior art, after the formed tube 100 is extruded from the mold, it directly enters the connecting tube 1. Since the tube wall of the silicon carbide formed tube 100 is thin, the formed tube 100 will also be deformed under the action of its own gravity. In order to solve this problem, a heating tube 2 is provided at the feeding end of the connecting tube 1 in the utility model embodiment of the present invention. The heating tube 2 is coaxially arranged with the connecting tube 1, and the formed tube 100 can be heated and solidified when passing through the heating tube 2.

[0030] The pressureless silicon carbide extrusion forming pipe material connection device provided by the utility model is provided with a heating tube 2 at the feeding end of the connection pipe 1, so that the formed pipe can be heated in the heating tube 2 before entering the connection pipe 1, so that the surface moisture of the formed pipe 100 is lost and it becomes a semi-solidified state, and the strength of the solidified formed pipe 100 can overcome the effect of its own gravity, thereby avoiding the deformation of the formed pipe 100 in the connection pipe 1, which is conducive to improving the forming quality of the formed pipe 100. The heating tube 2 and the connection pipe 1 are coaxially arranged, which is conducive to uniform heating of the circumference of the formed pipe 100, and enables the formed pipe 100 to smoothly enter the heating tube 2 and the connection pipe 1 during the extrusion process from the mold.

[0031] In some embodiments, the heating tube 2 is provided with an infrared heater outside.

[0032] Among them, the infrared heater can be set outside the heating tube 2 to heat the formed tube 100 in the heating tube 2, thereby realizing non-contact heating of the formed tube 100. The infrared heating method can quickly heat the formed tube 100 so that its tube wall strength meets the requirements.

[0033] In some embodiments, the heating tube 2 has a U-shaped cross section or a circular cross section, and the bottom end of the U-shaped cross section is semicircular.

[0034] like Figure 2 and Figure 3 As shown, when the heating tube 2 is a U-shaped cross-section, the bottom arc segment of the U-shaped cross-section is a semicircular arc. The U-shaped cross-section or the circular cross-section is conducive to uniform heating of the formed tube 100, can reduce the contact of the formed tube 100 caused by structural changes, and try to avoid the formed tube 100 from touching or squeezing and deforming. Even if contact occurs, the deformation of the formed tube 100 can be reduced due to the arc-shaped inner wall of the U-shaped cross-section or the circular cross-section.

[0035] In some embodiments, a first vent 21 is provided on the lower wall of the heating tube 2 , and the air intake at the first vent 21 can suspend the formed tube 100 in the heating tube 2 so that the heating tube 2 and the formed tube 100 are not in contact.

[0036] like Figure 1-Figure 3 A first vent 21 is provided on the heating tube 2, and the first vent 21 is used to supply air to the inside of the heating tube 2, so that the airflow can overcome the gravity of the formed tube 100, so that the formed tube 100 can be suspended in the heating tube 2, and gradually pass through the heating tube 2 and enter the blank tube 1 under the extrusion force of the mold.

[0037] In a preferred solution, a plurality of first vents 21 are provided, and the plurality of first vents 21 are arranged at intervals along the long axis direction of the heating tube 2, so as to evenly supply air to the shaped tube 100 in the long axis direction; the arrangement area of ​​the plurality of first vents 21 on the lower tube wall of the heating tube 2 does not exceed the height of the long axis of the heating tube 2; Figure 2 and Figure 3 The area where the multiple first vents 21 are arranged along the lower tube wall of the heating tube 2 refers to the semicircular area below the long axis of the heating tube 2. The multiple first vents 21 are arranged at intervals on the lower semicircular surface, so that the area below the long axis of the formed tube 100 can be uniformly stressed under the action of the airflow, avoiding deformation of the formed tube 100 caused by uneven airflow. In some embodiments, the first vents 21 can be long strip holes or circular holes, and can be specifically arranged according to the length or aperture of the heating tube 2.

[0038] In some embodiments, the length of the heating tube 2 is shorter than the length of the connecting tube 1 .

[0039] like Figure 1 As shown, the heating tube 2 is arranged at the front end of the blank tube 1, between the die extrusion port and the blank tube 1. When the formed tube 100 leaves the die, it preferentially enters the heating tube 2 to be heated. Since the other end of the formed tube 100 is still in the die at this time, the end of the formed tube 100 located in the heating tube 2 will be suspended in the heating tube 2. When the formed tube 100 is heated and solidified, the tube wall strength increases, and then it enters the subsequent blank tube 1. It can be understood that the length of the heating tube 2 is related to the heating temperature, the moisture content of the formed tube 100, and the curing reaction rate. This embodiment does not limit the specific length of the heating tube 2.

[0040] In some embodiments, the cross section of the blank tube 1 is circular. Figure 4 As shown, the connecting tube 1 is a circular tube, which is compatible with the structural shape of the formed tube 100. After the formed tube 100 enters the connecting tube 1, it can be forcibly straightened by the connecting tube 1. Therefore, the inner diameter D1 of the connecting tube 1 is larger than the outer diameter d of the formed tube 100, and D1-d is not larger than 0.5mm. This structure can ensure that the curvature of the formed tube 100 is less than 0.3mm, meeting the quality requirements of the formed tube 100.

[0041] In some embodiments, the inner diameter D2 of the heating tube 2 is larger than the inner diameter D1 of the connecting tube 1 .

[0042] like Figure 1 and Figure 3The inner diameter D2 of the heating tube 2 is larger than the outer diameter d of the formed tube 100, so that the formed tube 100 can smoothly enter the heating tube 2. At the same time, in order to further prevent the formed tube 100 from contacting the tube wall of the heating tube 2, the inner diameter D2 of the heating tube 2 is set to be larger than the inner diameter D1 of the blank tube 1, thereby ensuring that the formed tube 100 can always be suspended in the heating tube 2 without contacting the tube wall of the heating tube 2, and avoiding contact deformation of the formed tube 100 before heating and curing.

[0043] In some embodiments, a second vent 11 is disposed on the lower tube wall of the blank-joining tube 1 , and the air intake at the second vent 11 can suspend the formed tube 100 in the blank-joining tube 1 .

[0044] like Figure 1 and Figure 4 A second vent 11 is provided on the tube wall below the long axis of the connecting tube 1, and the second vent 11 is used to blow air into the connecting tube 1, so that the formed tube 100 can be suspended in the connecting tube 1 under the action of the airflow, reducing contact deformation of the formed tube 100.

[0045] In some embodiments, a plurality of second vents 11 are provided, and the plurality of second vents 11 are spaced apart along the long axis direction of the connecting tube 1 , and the setting area of ​​the plurality of second vents 11 on the lower tube wall of the connecting tube 1 does not exceed the height of the long axis of the connecting tube 1 .

[0046] The second ventilation openings 11 may be elongated holes or circular holes. The second ventilation openings 11 are evenly arranged and can provide uniform airflow for the formed tube 100 .

[0047] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. Pressureless silicon carbide extrusion molding pipe blank joining device, characterized in that: It comprises a blank-joining tube (1), wherein a heating tube (2) is provided at the feeding end of the blank-joining tube (1), wherein the heating tube (2) is coaxially arranged with the blank-joining tube (1), and a formed tube (100) can be heated and solidified when passing through the heating tube (2).

2. The pressureless silicon carbide extrusion molding pipe blank joining device according to claim 1 is characterized in that: The heating tube (2) is externally provided with an infrared heater.

3. The pressureless silicon carbide extrusion molding pipe blank joining device according to claim 1 is characterized in that: The heating tube (2) has a U-shaped cross section or a circular cross section, and the bottom end of the U-shaped cross section is in a semicircular arc shape.

4. The pressureless silicon carbide extrusion molding pipe blank joining device according to claim 1 is characterized in that: A first vent (21) is provided on the lower tube wall of the heating tube (2), and the air intake airflow at the first vent (21) can suspend the shaped tube (100) in the heating tube (2) so that the heating tube (2) and the shaped tube (100) are not in contact.

5. The pressureless silicon carbide extrusion molding pipe blank joining device according to any one of claims 1 to 4, characterized in that: The length of the heating tube (2) is shorter than the length of the blank connecting tube (1).

6. The pressureless silicon carbide extrusion molding pipe blank joining device according to any one of claims 1 to 4, characterized in that: The cross section of the blank connecting tube (1) is circular.

7. The pressureless silicon carbide extrusion molding pipe blank joining device according to any one of claims 1 to 4, characterized in that: The inner diameter D1 of the blank-joining tube (1) is larger than the outer diameter d of the shaped tube (100), and D1-d is not larger than 0.5 mm.

8. The pressureless silicon carbide extrusion molding pipe blank joining device according to any one of claims 1 to 4, characterized in that: The inner diameter D2 of the heating tube (2) is larger than the inner diameter D1 of the blank connecting tube (1).

9. The pressureless silicon carbide extrusion molding pipe blank joining device according to claim 4, characterized in that: A second vent (11) is provided on the lower tube wall of the blank-joining tube (1), and the air intake airflow at the second vent (11) can suspend the formed tube (100) in the blank-joining tube (1).

10. The pressureless silicon carbide extrusion molding pipe blank joining device according to claim 9, characterized in that: A plurality of first vents (21) are provided, and the plurality of first vents (21) are arranged at intervals along the long axis direction of the heating tube (2), and the arrangement area of ​​the plurality of first vents (21) on the lower tube wall of the heating tube (2) does not exceed the height of the long axis of the heating tube (2); a plurality of second vents (11) are provided, and the plurality of second vents (11) are arranged at intervals along the long axis direction of the connecting tube (1), and the arrangement area of ​​the plurality of second vents (11) on the lower tube wall of the connecting tube (1) does not exceed the height of the long axis of the connecting tube (1).

Images