Energy-saving heating structure of double-screw extruder for color master batch production

Abstract

The application discloses an energy-saving heating structure of a double-screw extruder for color master batch production, belongs to the technical field of extruder components, and is used for providing an energy-saving heating structure of a double-screw extruder for color master batch production which can realize directional heat transfer, and comprises a plurality of heat sealing units which are adapted to be tightly attached to end faces, wherein the heat sealing unit comprises an annular electric heating core, the inner side of the electric heating core is provided with a wear-resistant ring, the outer side of the electric heating core is provided with a heat insulation ring, one end of the electric heating core is provided with a first side ring, the other end of the electric heating core is provided with a second side ring, the first side ring and the second side ring are fixedly connected with the wear-resistant ring, the heat insulation ring is located between the first side ring and the second side ring, the edge of the heat insulation ring is sealed with the first side ring and the second side ring, and the edges of the first side ring and the second side ring are fixedly connected with a sealing ring. According to the application, the material with high thermal conductivity is arranged on the inner side of the electric heating core, and the material with low thermal conductivity is arranged at both ends and the outer side of the electric heating core, so that most of the heat is collected in the center where the barrel is located.

Description

Technical Field

[0001] This application relates to the field of extruder component technology, and in particular to an energy-saving heating structure for a twin-screw extruder used in masterbatch production. Background Technology

[0002] In order to make the material in the extruder flow, a heating structure needs to be installed outside the extruder barrel. Since the heat generated by the heating element will diffuse in all directions, placing the heating element directly on the outside of the barrel results in a high waste of heat and a lot of useless energy consumption. Utility Model Content

[0003] The purpose of this application is to provide an energy-saving heating structure for a twin-screw extruder for masterbatch production that can transfer heat in a directional manner.

[0004] To achieve the above objectives, this application provides an energy-saving heating structure for a twin-screw extruder used in masterbatch production: it includes several heat-sealing units, which are adapted to have their end faces tightly attached. Each heat-sealing unit includes an annular heating core. The inner side of the heating core is provided with a wear-resistant ring, and the outer side is provided with a heat-insulating ring. One end of the heating core is provided with a first side ring, and the other end is provided with a second side ring. The first side ring and the second side ring are simultaneously fixedly connected to the wear-resistant ring. The heat-insulating ring is located between the first side ring and the second side ring, and the edge of the heat-insulating ring is sealed with the first side ring and the second side ring. The edges of the first side ring and the second side ring are jointly fixedly connected with a sealing ring. A heat-insulating cavity is formed between the opposing surfaces of the first side ring and the second side ring and the outer surface of the heat-insulating ring and the inner wall of the sealing ring, which can effectively prevent heat from diffusing outward.

[0005] As a preferred embodiment, the surface of the first side ring facing away from the heating core has a positioning plate, and the surface of the second side ring facing away from the heating core has a positioning groove. The positioning plate on one heat-sealing unit is adapted to fit with the positioning groove on another heat-sealing unit, so that the heat-sealing units restrain each other and can maintain the consistency and stability of the angle.

[0006] As a preferred embodiment, the shape, number, and position of the positioning plate and positioning groove of each heat-sealing unit are corresponding to ensure that the heat-sealing units have a consistent angle after assembly.

[0007] As a preferred embodiment, the wear-resistant ring is made of aluminum-based silicon carbide material, and the first side ring, the second side ring, the heat insulation ring, and the sealing ring are all made of strontium zirconate ceramic, which is one of the keys to achieving directional heat conduction.

[0008] As a preferred embodiment, the inner walls of the first and second side rings are in contact with the outer surface of the wear-resistant ring and are fixedly connected by a curing adhesive, thus balancing structural strength and sealing performance.

[0009] As a preferred embodiment, the edge of the heat insulation ring is fixed to the first side ring and the second side ring by a ring-coated curing adhesive; the edges of both the first side ring and the second side ring are fixedly connected to the sealing ring by a ring-coated curing adhesive, which also has good structural strength and sealing performance.

[0010] As a preferred embodiment, one end of the wear-resistant ring and the sealing ring is flush with the surface of the first side ring facing away from the second side ring, and the other end of the wear-resistant ring and the sealing ring is flush with the surface of the second side ring facing away from the first side ring, ensuring that the rear end face of the heat-sealing unit assembly can fit tightly.

[0011] As a preferred embodiment, the outer surface of the sealing ring has an extension tube, the end of the extension tube has a pipe joint, the pipe joint is connected to the insulation cavity through the extension tube, and a one-way valve is provided inside the extension tube to maintain the internal state of the insulation cavity.

[0012] Compared with the prior art, the beneficial effects of this application are as follows: (1) By setting a material with high thermal conductivity on the inner side of the heating core and a material with low thermal conductivity on both ends and the outer side of the heating core, most of the heat will be concentrated in the center of the barrel, thus realizing the directional conduction of heat, improving thermal efficiency and reducing useless energy consumption. (2) By designing the heat insulation ring and sealing ring to form a heat insulation cavity structure with the two side rings, the resistance to heat diffusion to the outside is further enhanced, so that the heating structure has a stronger heat sealing capacity and is more energy-efficient when working. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the energy-saving heating structure of the twin-screw extruder used for the production of this masterbatch.

[0014] Figure 2 This is a three-dimensional structural diagram of the heat-sealing unit of the energy-saving heating structure of the twin-screw extruder used for the production of this masterbatch.

[0015] Figure 3 This is a schematic diagram of the first three-dimensional structure of the energy-saving heating structure of the twin-screw extruder used for the production of this masterbatch, showing the cooperation between the two side rings, the wear-resistant ring, and the heat-insulating ring.

[0016] Figure 4 This is a schematic diagram of the second three-dimensional structure of the energy-saving heating structure of the twin-screw extruder used for the production of this masterbatch, showing the cooperation between the two side rings, the wear-resistant ring, and the heat-insulating ring.

[0017] Figure 5 A three-dimensional structural diagram of the heating element of the energy-saving heating structure of the twin-screw extruder used for the production of this masterbatch, arranged between the wear-resistant ring and the heat insulation ring.

[0018] In the diagram: 1. Heat sealing unit; 110. Wear-resistant ring; 120. Heating core; 130. First side ring; 131. Positioning plate; 140. Second side ring; 141. Positioning groove; 150. Heat insulation ring; 160. Sealing ring; 161. Extension tube; 162. Pipe connection end; 163. One-way valve; 156. Insulation cavity. Detailed Implementation

[0019] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0020] In the description of this application, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this application.

[0021] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0022] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0023] like Figure 1-5The energy-saving heating structure of the twin-screw extruder for masterbatch production shown includes several heat-sealing units 1. These units 1 need to be tightly joined at their end faces, forming a continuous heating structure outside the extruder barrel. Each heat-sealing unit 1 includes an annular heating element 120, which generates heat to raise the temperature when energized. The heating element 120 has a wear-resistant ring 110 on its inner side and a heat-insulating ring 150 on its outer side. The wear-resistant ring 110 is typically made of aluminum-based silicon carbide material, which has good thermal conductivity and wear resistance. The heat-insulating ring 150 is typically made of strontium zirconate ceramic, which has low thermal conductivity. For thermal insulation performance, the heating core 120 has a first side ring 130 at one end and a second side ring 140 at the other end. Both the first side ring 130 and the second side ring 140 are made of strontium zirconate ceramic, which also has good low thermal conductivity and thermal insulation performance. The first side ring 130 and the second side ring 140 are fixedly connected to the wear-resistant ring 110. Since the materials are different, welding is not possible. Therefore, the inner walls of the first side ring 130 and the second side ring 140 need to contact the outer surface of the wear-resistant ring 110 and be fixedly connected by curing adhesive. This also has good structural stability and sealing performance.

[0024] The heat insulation ring 150 is located between the first side ring 130 and the second side ring 140. The edge of the heat insulation ring 150 is sealed to the first side ring 130 and the second side ring 140. Although the heat insulation ring 150 is made of the same material as the first side ring 130 and the second side ring 140, it is not suitable to be integrally molded because the heating element 120 needs to be installed. Therefore, the edge of the heat insulation ring 150 also needs to be fixed to the first side ring 130 and the second side ring 140 by ring-coating curing adhesive. It also has good structural strength and sealing performance. The edges of the first side ring 130 and the second side ring 140 are jointly fixedly connected to the sealing ring 160. Similarly, because the heat insulation ring 150 needs to be installed, the sealing ring 160 is not suitable to be integrally molded with the first side ring 130 and the second side ring 140. The edges of the first side ring 130 and the second side ring 140 are fixedly connected to the sealing ring 160 by ring-coating curing adhesive, ensuring structural strength while also ensuring sealing performance.

[0025] A heat insulation cavity 156 is formed between the opposing surfaces of the first side ring 130 and the second side ring 140, the outer surface of the heat insulation ring 150, and the inner wall of the sealing ring 160. Regardless of whether the heat insulation cavity 156 has a heat insulation medium, it can effectively prevent heat from spreading outward. The outer surface of the sealing ring 160 has an extension tube 161, and the end of the extension tube 161 has a pipe connection end 162, which is convenient for connecting to an external pipe. The pipe connection end 162 is connected to the heat insulation cavity 156 through the extension tube 161. A one-way valve 163 is provided in the extension tube 161. In this embodiment, the one-way valve 163 only allows the air in the heat insulation cavity 156 to flow outward. Therefore, the pipe connection end 162 can be connected to an external vacuum machine to remove the air in the heat insulation cavity 156 to form a vacuum environment, which can also effectively prevent heat loss and has a good heat insulation effect.

[0026] One end of the wear-resistant ring 110 and the sealing ring 160 is flush with the surface of the first side ring 130 facing away from the second side ring 140, and the other end of the wear-resistant ring 110 and the sealing ring 160 is flush with the surface of the second side ring 140 facing away from the first side ring 130. In this way, only the wear-resistant ring 110 will contact the extruder barrel, while the first side ring 130 and the second side ring 140 will not be worn, thus maintaining structural integrity for a long time and extending service life.

[0027] The surface of the first side ring 130 facing away from the heating core 120 has a positioning plate 131, and the surface of the second side ring 140 facing away from the heating core 120 has a positioning groove 141. The shape, number and position of the positioning plate 131 and the positioning groove 141 of each heat sealing unit 1 are corresponding. The positioning plate 131 on one heat sealing unit 1 fits exactly with the positioning groove 141 on another heat sealing unit 1, thereby suppressing relative rotation and maintaining the angular consistency of all heat sealing units 1.

[0028] Installation method: Before installation, first connect each heat-sealing unit 1 to a vacuum machine to remove the air from the insulation cavity 156. The one-way valve 163 can maintain the vacuum state inside the insulation cavity 156 for a long time. Then, the heat-sealing units 1 are sequentially placed on the outside of the extruder barrel, and the positioning plates 131 and positioning grooves 141 on the end face of the heat-sealing unit 1 are mutually constrained. Finally, the heating cores 120 of each heat-sealing unit 1 are connected to the power supply equipment. Because the fit clearance between the inner wall of the wear-resistant ring 110 and the outer side of the barrel is very small... The wear-resistant ring 110 is small and has high thermal conductivity. After the heating core 120 is energized and heated, it can quickly transfer heat to the extruder barrel through the wear-resistant ring 110. The thermal conductivity of the first side ring 130, the second side ring 140 and the heat insulation ring 150 is very low. With the heat insulation cavity 156 structure surrounding the heating core 120, the heat generated by the heating core 120 is difficult to diffuse outward. Most of it is transferred to the material in the barrel through the wear-resistant ring 110. Therefore, the heating structure has higher thermal efficiency and is more energy-saving.

[0029] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. An energy-saving heating structure for a twin-screw extruder used in masterbatch production, characterized in that: The device includes several heat-sealing units (1), which are adapted to have their end faces tightly attached. Each heat-sealing unit (1) includes an annular heating core (120). The heating core (120) has a wear-resistant ring (110) on its inner side and a heat-insulating ring (150) on its outer side. One end of the heating core (120) has a first side ring (130), and the other end has a second side ring (140). The first side ring (130) and the second side ring (140) are simultaneously fixedly connected to the wear-resistant ring (110). The heat insulation ring (150) is located between the first side ring (130) and the second side ring (140). The edge of the heat insulation ring (150) is sealed with the first side ring (130) and the second side ring (140). The edges of the first side ring (130) and the second side ring (140) are fixedly connected to a sealing ring (160). A heat insulation cavity (156) is formed between the opposing surfaces of the first side ring (130) and the second side ring (140) and the outer surface of the heat insulation ring (150) and the inner wall of the sealing ring (160).

2. The energy-saving heating structure of the twin-screw extruder for masterbatch production as described in claim 1, characterized in that: The first side ring (130) has a positioning plate (131) on the surface facing away from the heating core (120), and the second side ring (140) has a positioning groove (141) on the surface facing away from the heating core (120). The positioning plate (131) on one heat sealing unit (1) is adapted to fit with the positioning groove (141) on another heat sealing unit (1).

3. The energy-saving heating structure of the twin-screw extruder for masterbatch production as described in claim 2, characterized in that: The shape, number, and position of the positioning plate (131) and positioning groove (141) of each heat-sealing unit (1) are corresponding.

4. The energy-saving heating structure of the twin-screw extruder for masterbatch production as described in claim 3, characterized in that: The wear-resistant ring (110) is made of aluminum-based silicon carbide material, and the first side ring (130), the second side ring (140), the heat insulation ring (150) and the sealing ring (160) are all made of strontium zirconate ceramic.

5. The energy-saving heating structure of the twin-screw extruder for masterbatch production as described in claim 4, characterized in that: The inner walls of the first side ring (130) and the second side ring (140) are in contact with the outer surface of the wear-resistant ring (110) and are fixedly connected by a curing adhesive.

6. The energy-saving heating structure of the twin-screw extruder for masterbatch production as described in claim 5, characterized in that: The edge of the heat insulation ring (150) is fixed to the first side ring (130) and the second side ring (140) by ring-coating curing adhesive; the edges of the first side ring (130) and the second side ring (140) are both fixedly connected to the sealing ring (160) by ring-coating curing adhesive.

7. The energy-saving heating structure of the twin-screw extruder for masterbatch production as described in claim 6, characterized in that: One end of the wear-resistant ring (110) and the sealing ring (160) is flush with the surface of the first side ring (130) facing away from the second side ring (140), and the other end of the wear-resistant ring (110) and the sealing ring (160) is flush with the surface of the second side ring (140) facing away from the first side ring (130).

8. The energy-saving heating structure of the twin-screw extruder for masterbatch production as described in any one of claims 1 to 7, characterized in that: The outer side of the sealing ring (160) has an extension tube (161), and the end of the extension tube (161) has a pipe connector (162). The pipe connector (162) is connected to the heat preservation cavity (156) through the extension tube (161). A one-way valve (163) is provided inside the extension tube (161).

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