Powder sintering pipeline

Abstract

The utility model belongs to the technical field of powder sintering, and discloses a powder sintering pipeline which comprises a pipeline body erected in a furnace body, powder to be sintered enters from the upper end of the pipeline body and is discharged from the lower end of the pipeline body, and heating is completed in the process that the powder freely falls from the upper end to the lower end. The pipeline body comprises a constant-temperature section and a buffering section located below the constant-temperature section, the constant-temperature section is used for heating powder, the buffering section is used for cooling the powder, the constant-temperature section and the buffering section are connected through a reducing section, the pipe diameter of the buffering section is smaller than that of the constant-temperature section, and a flow control mechanism is arranged at a bottom end opening of the buffering section. And the flow control mechanism is used for controlling the discharge amount of the powder. According to the powder sintering pipeline, the vertically-arranged pipeline body is designed, powder is sintered in the process that the pipeline body freely falls off, extra driving force is not needed, the falling mode is more beneficial to powder scattering, the heating effect is fully guaranteed, energy consumption is reduced, and a new machining mode and implementation equipment are provided for powder sintering.

Description

Technical Field

[0001] The utility model relates to the technical field of powder sintering, in particular to a powder sintering pipeline. Background Art

[0002] At present, the powder sintering process is mainly carried out by loading the powder in a sagger and passing it through a roller furnace, and the process requires heating, heat preservation, cooling and other processes. Since the surface powder and the inner powder in the sagger are heated to different degrees, to ensure that all the powder is burned through, greater heat and longer heating time are required. In addition, power to drive the sagger is required during the circulation between various processes. Therefore, it is hoped that the equipment or method for powder sintering will be optimized. Utility Model Content

[0003] Based on the above problems, the purpose of the utility model is to provide a powder sintering pipeline to reduce processing energy consumption and meet production requirements.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A powder sintering pipeline comprises a pipeline body erected in a furnace body, the powder to be sintered enters from the upper end of the pipeline body and is discharged from the lower end, and is heated in the process of freely falling from the upper end to the lower end, the pipeline body comprises a constant temperature section and a buffer section located below the constant temperature section, the constant temperature section is used to heat the powder, the buffer section is used to cool the powder, the constant temperature section and the buffer section are connected by a reducing section, the diameter of the buffer section is smaller than the diameter of the constant temperature section, and a flow control mechanism is provided at the bottom end port of the buffer section, the flow control mechanism is used to control the discharge amount of the powder.

[0006] As an optional solution, the flow control mechanism includes an adjusting plate, which is conical in shape. The tip of the adjusting plate extends into the port of the buffer section. The diameter of the cone bottom of the adjusting plate is larger than the pipe diameter of the buffer section. The distance between the adjusting plate and the port of the buffer section determines the amount of powder discharged per unit time.

[0007] As an optional solution, the flow control mechanism also includes an adjusting rod, a connecting rod and a top screw. The adjusting rod is located below the adjusting plate. The middle part of the adjusting rod is hinged and fixed to the furnace body. One end of the connecting rod is hinged to the bottom of the adjusting plate, and the other end of the connecting rod is hinged to one end of the adjusting rod. The top screw applies pressure to the other end of the adjusting rod.

[0008] As an optional solution, a plurality of limit rods are provided on the outer edge of the adjustment plate, and the limit rods enable the adjustment plate to move only up and down.

[0009] As an optional solution, the flow control mechanism includes a manual butterfly valve, which controls the opening degree of the port of the buffer section.

[0010] As an optional solution, the pipeline body is made of SiC material, and the furnace body is provided with heating wires arranged around the constant temperature section.

[0011] As an optional solution, an air cooling cavity is provided in the furnace body, the buffer section is in the air cooling cavity, and a cooling air inlet and a hot air outlet communicating with the air cooling cavity are provided on the outer surface of the furnace body.

[0012] As an optional solution, at least one pipeline body is provided. When a plurality of pipeline bodies are provided, the plurality of pipeline bodies are evenly distributed in an annular direction or in an array in the furnace body.

[0013] The beneficial effects of the utility model are as follows: the powder sintering pipeline is designed with a vertically arranged pipeline main body, so that the powder can be sintered in the process of free falling of the pipeline main body without additional driving force, and this falling method is more conducive to the dispersion of the powder, fully ensuring the heating effect, reducing energy consumption, and providing a new processing method and implementation equipment for powder sintering. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of a powder sintering pipeline provided in an embodiment of the utility model;

[0015] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0016] Figure 3 It is a schematic diagram of the installation of the flow control mechanism involved in the embodiment of the utility model on the furnace body;

[0017] Figure 4 It is another structural schematic diagram of the flow control mechanism involved in the embodiment of the utility model.

[0018] In the attached figure:

[0019] 1. Furnace body; 2. Pipeline body; 21. Constant temperature section; 22. Buffer section; 23. Variable diameter section; 3. Adjustment plate; 4. Adjustment rod; 5. Connecting rod; 6. Top screw; 7. Limit rod; 8. Manual butterfly valve; 9. Heating wire; 10. Air cooling chamber; 11. Cooling air inlet; 12. Hot air outlet. DETAILED DESCRIPTION

[0020] 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.

[0021] 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.

[0022] 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.

[0023] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships 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.

[0024] See also Figures 1 to 3 As shown, the preferred embodiment provides a powder sintering pipeline, including a pipeline body 2 erected in a furnace body 1, the powder to be sintered enters from the upper end of the pipeline body 2 and is discharged from the lower end, and is heated in the process of freely falling from the upper end to the lower end, the pipeline body 2 includes a constant temperature section 21 and a buffer section 22 located below the constant temperature section 21, the constant temperature section 21 is used to heat the powder, and the buffer section 22 is used to cool the powder, the constant temperature section 21 and the buffer section 22 are connected by a reducing section 23, the diameter of the buffer section 22 is smaller than the diameter of the constant temperature section 21, and the bottom end port of the buffer section 22 is provided with a flow control mechanism, and the flow control mechanism is used to control the discharge amount of the powder.

[0025] Therefore, the powder sintering pipeline is designed with a vertically arranged pipeline main body 2, so that the powder can be sintered in the process of free falling in the pipeline main body 2 without the need for additional driving force. This falling method is more conducive to the dispersion of the powder, fully ensuring the heating effect, reducing energy consumption, and providing a new processing method and implementation equipment for powder sintering.

[0026] Among them, the variable diameter design and flow control mechanism can be used to control the residence time of the powder in each section of the pipeline body 2 to meet the process requirements of the heating, insulation, cooling and other stages. Compared with the sagger flow method, the powder flow control is simpler and does not require additional power.

[0027] Specifically, the flow control mechanism here includes an adjusting plate 3, which is conical, and the cone tip of the adjusting plate 3 extends into the port of the buffer section 22. The cone bottom diameter of the adjusting plate 3 is larger than the pipe diameter of the buffer section 22. The distance between the adjusting plate 3 and the port of the buffer section 22 determines the discharge amount of powder per unit time. The smaller the distance between the adjusting plate 3 and the port of the buffer section 22, the smaller the discharge amount per unit time; the larger the distance between the adjusting plate 3 and the port of the buffer section 22, the larger the discharge amount per unit time. Therefore, by controlling the upper and lower positions of the adjusting plate 3 relative to the port of the buffer section 22, the discharge amount of powder can be controlled.

[0028] Furthermore, the flow control mechanism also includes an adjusting rod 4, a connecting rod 5 and a top screw 6. The adjusting rod 4 is located below the adjusting plate 3. The middle part of the adjusting rod 4 is hinged and fixed on the furnace body 1. One end of the connecting rod 5 is hinged to the bottom of the adjusting plate 3, and the other end of the connecting rod 5 is hinged to one end of the adjusting rod 4. The top screw 6 presses on the other end of the adjusting rod 4. The amount of pressure exerted by the top screw 6 on the adjusting rod 4 can thereby control the port distance between the adjusting plate 3 and the buffer section 22.

[0029] Furthermore, a plurality of limit rods 7 are provided on the outer edge of the adjustment plate 3. In this embodiment, four limit rods 7 evenly distributed on the circumference are used as an example. The four limit rods 7 enable the adjustment plate 3 to move only up and down, thereby ensuring accurate movement of the adjustment plate 3.

[0030] Alternatively, the flow control mechanism here can also use a common valve body, such as Figure 4 As shown, the flow control mechanism includes a manual butterfly valve 8. By controlling the opening angle of the manual butterfly valve 8, the opening degree of the port of the buffer section 22 can be controlled, thereby controlling the discharge amount of the powder.

[0031] Specifically, the pipeline body 2 is made of SiC material, which has the advantages of high pressure resistance, high frequency resistance and high temperature resistance, and will not react with the powder. The furnace body 1 is provided with heating wires 9 arranged around the constant temperature section 21 to provide the required heating temperature.

[0032] Specifically, an air-cooling cavity 10 is provided in the furnace body 1, and the buffer section 22 is in the air-cooling cavity 10. The outer surface of the furnace body 1 is provided with a cooling air inlet 11 and a hot air outlet 12 which are connected to the air-cooling cavity 10. The low-temperature air entering from the cooling air inlet 11 and exiting from the hot air outlet 12 takes away the heat in the air-cooling cavity 10, so as to reduce the powder temperature of the buffer section 22.

[0033] In particular, at least one pipeline body 2 is provided. When multiple pipeline bodies 2 are provided, the multiple pipeline bodies 2 are evenly distributed in a ring or in an array in the furnace body 1, so that each pipeline body 2 is heated evenly in the furnace body 1. This embodiment takes four pipeline bodies 2 distributed in a rectangular shape as an example.

[0034] 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. Powder sintering pipeline, characterized in that: The invention comprises a pipe body (2) erected in a furnace body (1), wherein powder to be sintered enters from the upper end of the pipe body (2) and is discharged from the lower end, and is heated in the process of freely falling from the upper end to the lower end, wherein the pipe body (2) comprises a constant temperature section (21) and a buffer section (22) located below the constant temperature section (21), wherein the constant temperature section (21) is used to heat the powder, and the buffer section (22) is used to cool the powder, wherein the constant temperature section (21) and the buffer section (22) are connected via a reducing section (23), wherein the diameter of the buffer section (22) is smaller than that of the constant temperature section (21), and a flow control mechanism is provided at the bottom end port of the buffer section (22), wherein the flow control mechanism is used to control the discharge amount of the powder.

2. The powder sintering pipeline according to claim 1, characterized in that: The flow control mechanism comprises an adjusting plate (3), the adjusting plate (3) is in a conical shape, the tip of the adjusting plate (3) extends into the port of the buffer section (22), the diameter of the cone bottom of the adjusting plate (3) is larger than the pipe diameter of the buffer section (22), and the distance between the adjusting plate (3) and the port of the buffer section (22) determines the discharge amount of the powder in a unit time.

3. The powder sintering pipeline according to claim 2, characterized in that: The flow control mechanism also includes an adjusting rod (4), a connecting rod (5) and a top screw (6); the adjusting rod (4) is located below the adjusting plate (3); the middle part of the adjusting rod (4) is hingedly fixed to the furnace body (1); one end of the connecting rod (5) is hingedly connected to the bottom of the adjusting plate (3); the other end of the connecting rod (5) is hingedly connected to one end of the adjusting rod (4); and the top screw (6) acts on the other end of the adjusting rod (4) by pressing.

4. The powder sintering pipeline according to claim 3, characterized in that: A plurality of limiting rods (7) are arranged on the outer edge of the adjustment plate (3), and the limiting rods (7) enable the adjustment plate (3) to move only up and down.

5. The powder sintering pipeline according to claim 1, characterized in that: The flow control mechanism comprises a manual butterfly valve (8), and the manual butterfly valve (8) controls the opening degree of the port of the buffer section (22).

6. The powder sintering pipeline according to claim 1, characterized in that: The pipeline body (2) is made of SiC material, and a heating wire (9) arranged around the constant temperature section (21) is provided in the furnace body (1).

7. The powder sintering pipeline according to claim 1, characterized in that: An air cooling cavity (10) is provided in the furnace body (1), the buffer section (22) is located in the air cooling cavity (10), and a cooling air inlet (11) and a hot air outlet (12) which are in communication with the air cooling cavity (10) are provided on the outer surface of the furnace body (1).

8. The powder sintering pipeline according to claim 1, characterized in that: At least one pipeline main body (2) is provided. When a plurality of pipeline main bodies (2) are provided, the plurality of pipeline main bodies (2) are evenly distributed in an annular direction or in an array in the furnace body (1).

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