Temperature measuring device of double-screw extruder

Abstract

The utility model discloses a temperature measuring device of a double-screw extruder, and belongs to the field of extruders. According to the technical scheme, the temperature measuring device of the double-screw extruder comprises an extrusion mechanism, the extrusion mechanism is provided with a feeding end and a discharging end, a plurality of sets of sealing shells are arranged on the outer wall of the extrusion mechanism from the feeding end to the discharging end at intervals, and a sealing heat exchange cavity is formed between the sealing shells and the outer wall of the extrusion mechanism. An exhaust hole penetrating into the sealed heat exchange cavity is formed in the sealed shell, an air guide pipe is arranged on the extrusion mechanism, the air guide pipe is connected with the exhaust hole through an exhaust pipeline, a temperature measuring assembly is arranged on the air guide pipe, and an air guide mechanism is arranged on the sealed shell; according to the utility model, the sealing shell is arranged outside the extrusion mechanism, so that the later repair and maintenance are convenient, the extrusion mechanism is convenient to protect, the service life of the extrusion mechanism is prolonged, the fault occurrence rate of the extrusion mechanism is reduced, and the maintenance cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of extruders, and in particular relates to a temperature measuring device for a twin-screw extruder. Background Art

[0002] Twin-screw extruders are developed on the basis of single-screw extruders. They have been widely used in the molding of extruded products due to their good feeding performance, mixing and plasticizing performance, exhaust performance, extrusion stability and other characteristics. The temperature of the extruder screw plays a key role in the production quality control of the product. In order to optimize the mixing and plasticizing effect and efficiency, existing extruder designers will set multiple groups of heating elements at intervals along the extruder discharge direction. The heating temperature of each group of heating elements is set to a specific temperature difference. In actual use, the temperature of each heating section needs to be tested to ensure the mixing and plasticizing effect of the material.

[0003] In the prior art, patent document with application number 202022467903.4 discloses a twin-screw extruder with a temperature detection function, which uses a temperature measuring device built into the barrel to measure the internal temperature of the barrel. The disadvantage of this temperature detection method is that the temperature measuring device is not easy to maintain, the maintenance cost is high, and it is not easy to measure the temperature of different heating sections, and its practicality is low. Utility Model Content

[0004] The utility model provides a temperature measuring device for a twin-screw extruder to solve at least one of the above technical problems.

[0005] The technical solution adopted by the utility model is:

[0006] A temperature measuring device for a twin-screw extruder comprises an extrusion mechanism, the extrusion mechanism having a feed end and a discharge end, a plurality of sealed shells are arranged on the outer wall of the extrusion mechanism at intervals from the feed end to the discharge end, a sealed heat exchange chamber is provided between the sealed shell and the outer wall of the extrusion mechanism, an exhaust hole penetrating into the sealed heat exchange chamber is provided on the sealed shell, an air guide pipe is provided on the extrusion mechanism, the air guide pipe and the exhaust hole are connected via an exhaust duct, a temperature measuring component is provided on the air guide pipe, and an air guide mechanism is provided on the sealed shell.

[0007] Preferably, a heat exchange plate is provided in the sealed shell, and the heat exchange plate abuts against the outer wall of the extrusion mechanism.

[0008] Preferably, the outer walls of the sealed shell, the air duct and the exhaust duct are all provided with a thermal insulation layer.

[0009] Preferably, the air guiding mechanism comprises a blower having an exhaust end and an air inlet end, and the exhaust end is connected to the sealed heat exchange chamber.

[0010] Preferably, the extrusion mechanism comprises an extrusion tube, in which two push screws rotating in opposite directions are arranged.

[0011] Preferably, a detection port is provided on one side of the extrusion tube close to the discharge end, a sealing cover is fixedly connected to the detection port, a pressure sensor is provided on the sealing cover, and a pressure display for receiving a signal from the pressure sensor is provided on the sealing cover.

[0012] Preferably, the air duct is fixed on the sealing cover, and the temperature measuring component includes a thermometer, the thermometer has a temperature measuring probe, and the temperature measuring probe is connected to the air duct through a thread.

[0013] Preferably, a protective cover is provided outside the extrusion tube.

[0014] Preferably, the thermometer and the pressure display are both located outside the protective cover.

[0015] Preferably, the feed end is connected with a feed assembly, a feed pipe of the feed assembly, the feed pipe is connected to the feed end via a flange, and a hopper is provided on the feed pipe.

[0016] Due to the adoption of the above technical solution, the beneficial effects achieved by the utility model are as follows:

[0017] 1. In this application, the number of sealed shells is the same as the number of heating components, and each heating component corresponds to a sealed shell. The output temperature of the heating component is transferred to the sealed shell along the outer shell of the extrusion mechanism. When it is necessary to measure the temperature of any heating section of the extrusion mechanism, it is only necessary to open the air guide mechanism set on the sealed shell of the section. The air guide mechanism introduces the outside air into the sealed heat exchange chamber to exchange heat with the extrusion mechanism. After the air entering the sealed heat exchange chamber is heat exchanged, its temperature is the same as the output temperature of the heating component. The air that absorbs heat is discharged into the air guide pipe along the exhaust hole and the exhaust pipe, and is discharged from the exhaust port of the air guide pipe. The temperature measuring component can measure the temperature of the air entering the air guide pipe. The staff can know the temperature value of the temperature detection section of the extrusion mechanism through the temperature value measured by the temperature measuring component. The sealed shell is installed outside the extrusion mechanism, which is convenient for later repair and maintenance, and is convenient for protecting the extrusion mechanism, thereby increasing the service life of the extrusion mechanism, reducing the failure rate of the extrusion mechanism, and reducing the maintenance cost.

[0018] 2. As a preferred embodiment of the utility model, a heat exchange plate is provided in the sealed housing, and the heat exchange plate is against the outer wall of the extrusion mechanism. The heat exchange efficiency of the air entering the sealed housing can be improved by setting the heat exchange plate, thereby reducing the heat exchange time for the air to reach the temperature peak and accelerating the temperature detection efficiency.

[0019] 3. As a preferred embodiment of the utility model, the provision of an insulation layer facilitates the insulation of the sealed shell, the air duct, and the exhaust duct, thereby preventing the air from exchanging heat with the outside world during the process of flowing through the sealed shell, the air duct, and the exhaust duct, causing detection errors, and improving the accuracy of temperature detection.

[0020] 4. As a preferred embodiment of the present invention, the sealing cover is provided to facilitate sealing of the detection port, the pressure sensor is provided to detect the internal pressure of the extrusion tube, and the pressure display is provided to facilitate receiving and displaying the detection signal of the pressure sensor, so that the staff can monitor the material pressure near the discharge end of the extrusion tube in real time to avoid material breakage during the extrusion process due to insufficient pressure.

[0021] By fixing the air duct on the sealing cover, the assembly can be made more compact, saving the assembly space of the thermometer and the pressure display. The staff can obtain the temperature data and the pressure data at the same position, and the design is more in line with the staff's usage habits.

[0022] 5. As a preferred embodiment of the present invention, the provision of a protective cover facilitates the protection of the extrusion tube and the blower, preventing personnel from contacting the outer wall of the extrusion tube and causing burns.

[0023] The thermometer and pressure display are both located outside the protective cover. This design makes it easy for workers to observe the temperature and pressure values ​​directly. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is one of the structural schematic diagrams of a specific implementation method of the utility model;

[0025] Figure 2 It is a schematic diagram of the structure of the extrusion tube in the utility model;

[0026] Figure 3 This is a schematic diagram of the connection between the thermometer and the pressure display in the specific implementation mode of the utility model;

[0027] Figure 4 This is the second structural schematic diagram of a specific implementation method of the utility model.

[0028] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0029] In the attached picture:

[0030] 10. Extrusion tube; 101. Feed end; 1011. Feed pipe; 1012. Hopper; 102. Discharge end; 103. Inspection port; 20. Sealed shell; 201. Exhaust hole; 30. Blower; 40. Sealing cover; 401. Air guide tube; 403. Thermometer; 404. Pressure display; 405. Exhaust duct; 50. Protective cover. DETAILED DESCRIPTION

[0031] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in the form of examples in conjunction with the accompanying drawings.

[0032] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0033] In addition, in the description of the present invention, it should be understood that the terms "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like 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, an electrical connection, or a communication; 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.

[0035] In the present utility model, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "implementation method", "example", "one embodiment", "example" or "specific example" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0036] Reference Figure 1-Figure 4 A temperature measuring device for a twin-screw extruder includes an extrusion mechanism, the extrusion mechanism having a feed end 101 and a discharge end 102, a plurality of sealed shells 20 are arranged on the outer wall of the extrusion mechanism from the feed end 101 to the discharge end 102, a sealed heat exchange chamber is provided between the sealed shell 20 and the outer wall of the extrusion mechanism, an exhaust hole 201 penetrating into the sealed heat exchange chamber is provided on the sealed shell 20, an air guide pipe 401 is provided on the extrusion mechanism, the air guide pipe 401 and the exhaust hole 201 are connected by an exhaust pipe 405, a temperature measuring component is provided on the air guide pipe 401, and an air guide mechanism is provided on the sealed shell 20.

[0037] Those skilled in the art can understand that a heating component is provided on the housing of the extrusion mechanism, and the solid raw material particles enter the extrusion mechanism from the feed end 101 and are heated to a molten state. The molten material is discharged from the discharge end 102 to the molding module under the push and compression of the extrusion mechanism. The molding module extrude and mold the molten raw material under the push of the extrusion mechanism. After being extruded from the molding module, the raw material is solidified after being cooled and further processed into a finished workpiece.

[0038] Along the discharge direction of the extrusion mechanism, multiple groups of heating components are arranged at intervals, and the heating temperature of each group of heating components is set to a specific temperature difference. The number of sealed shells 20 is the same as the number of heating components, and each heating component corresponds to a sealed shell 20. The output temperature of the heating component is transferred to the sealed shell 20 along the outer shell of the extrusion mechanism. When it is necessary to measure the temperature of any heating section of the extrusion mechanism, it is only necessary to open the air guide mechanism set on the sealed shell 20 of the section. The air guide mechanism introduces the outside air into the sealed heat exchange chamber to exchange heat with the extrusion mechanism. After the air entering the sealed heat exchange chamber is heat exchanged, its temperature is the same as the output temperature of the heating component. The air that absorbs heat is discharged into the air duct 401 along the exhaust hole 201 and the exhaust pipe 405, and is discharged from the exhaust port of the air duct 401. The temperature measuring component can measure the temperature of the air entering the air duct 401, and the staff knows the temperature value of the temperature detection section of the extrusion mechanism through the temperature value measured by the temperature measuring component. The sealing shell 20 is installed outside the extrusion mechanism, which is convenient for later repair and maintenance, and is also convenient for protecting the extrusion mechanism, thereby increasing the service life of the extrusion mechanism, reducing the failure rate of the extrusion mechanism, and reducing the maintenance cost.

[0039] As a preferred embodiment of the sealed housing 20, a heat exchange plate is provided in the sealed housing 20, and the heat exchange plate is against the outer wall of the extrusion mechanism. The heat exchange efficiency of the air entering the sealed housing 20 can be improved by providing the heat exchange plate, thereby reducing the heat exchange time for the air to reach the temperature peak and accelerating the temperature detection efficiency.

[0040] Furthermore, the outer walls of the sealed housing 20, the air duct 401, and the exhaust duct 405 are all provided with an insulation layer. The provision of the insulation layer facilitates the insulation of the sealed housing 20, the air duct 401, and the exhaust duct 405, thereby preventing the air from exchanging heat with the outside world during the process of passing through the sealed housing 20, the air duct 401, and the exhaust duct 405, thereby causing detection errors and improving the accuracy of temperature detection.

[0041] As a specific implementation of the air guide mechanism, refer to Figure 1-Figure 2 The air guide mechanism comprises a blower 30, which has an exhaust end and an air inlet end, and the exhaust end is connected to the sealed heat exchange chamber.

[0042] When it is necessary to detect the temperature of a specified section of the extrusion mechanism, the blower 30 of the corresponding section is turned on to allow outside air to enter through the air inlet end of the blower 30, and the air outlet end discharges the air into the sealed heat exchange chamber for heat exchange with the extrusion mechanism shell.

[0043] As a specific embodiment of the extrusion mechanism, the extrusion mechanism includes an extrusion tube 10, and two push screws rotating in opposite directions are arranged in the extrusion tube 10. Through the inner wall of the extrusion tube 10 and the two push screws rotating in opposite directions, the material particles can be quickly fused, thereby improving the production efficiency.

[0044] As a preferred embodiment of the present application, refer to Figure 2 and Figure 3 A detection port 103 is provided on one side of the extrusion tube 10 near the discharge end 102, and a sealing cover 40 is fixedly connected to the detection port 103. The sealing cover 40 is provided with a pressure sensor, and the sealing cover 40 is provided with a pressure display 404 for receiving the pressure sensor signal. The setting of the sealing cover 40 facilitates sealing the detection port 103, and the setting of the pressure sensor can detect the internal pressure of the extrusion tube 10. The setting of the pressure display 404 facilitates receiving and displaying the detection signal of the pressure sensor, so that the staff can monitor the material pressure near the discharge end 102 of the extrusion tube 10 in real time, so as to avoid the phenomenon of material breaking during the extrusion process due to insufficient pressure.

[0045] Furthermore, the air guide tube 401 is fixed on the sealing cover 40, and the temperature measuring component includes a thermometer 403, and the thermometer 403 has a temperature measuring probe, which is connected to the air guide tube 401 through a thread. By fixing the air guide tube 401 on the sealing cover 40, the assembly can be more compact, saving the assembly space of the thermometer 403 and the pressure display 404, and the staff can obtain the temperature data and the pressure data at the same position, and the design is more in line with the staff's usage habits.

[0046] As a preferred embodiment of the present application, refer to Figure 4, a protective cover 50 is provided outside the extrusion tube 10. The provision of the protective cover 50 facilitates the protection of the extrusion tube 10 and the blower 30, and prevents personnel from contacting the outer wall of the extrusion tube 10 and causing burns.

[0047] Furthermore, the thermometer 403 and the pressure display 404 are both located outside the protective cover 50. This design facilitates the staff to visually observe the temperature value and the pressure value.

[0048] As a preferred embodiment of the present application, refer to Figure 1 and Figure 3 The feed end 101 is connected to a feed assembly, a feed pipe 1011 of the feed assembly, the feed pipe 1011 is connected to the feed end 101 through a flange, and a hopper 1012 is provided on the feed pipe 1011.

[0049] By adding raw material particles into the hopper 1012, the hopper 1012 can temporarily store a certain amount of raw material particles to reduce the frequency of adding. The raw materials in the hopper 1012 enter the feeding pipe 1011 under the action of gravity, and the raw materials in the feeding pipe 1011 enter the extrusion tube 10 from the feeding end 101 for fusion.

[0050] The parts not described in the present invention can be realized by adopting or drawing on the existing technology.

[0051] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0052] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A temperature measuring device for a twin-screw extruder, comprising an extrusion mechanism, wherein the extrusion mechanism has a feed end (101) and a discharge end (102), characterized in that: The outer wall of the extrusion mechanism is provided with a plurality of groups of sealed shells (20) spaced apart from the feed end (101) to the discharge end (102); a sealed heat exchange chamber is provided between the sealed shell (20) and the outer wall of the extrusion mechanism; an exhaust hole (201) penetrating into the sealed heat exchange chamber is provided on the sealed shell (20); an air guide pipe (401) is provided on the extrusion mechanism; the air guide pipe (401) and the exhaust hole (201) are connected via an exhaust pipe (405); a temperature measuring component is provided on the air guide pipe (401); and an air guide mechanism is provided on the sealed shell (20).

2. A temperature measuring device for a twin-screw extruder according to claim 1, characterized in that: A heat exchange plate is provided in the sealed shell (20), and the heat exchange plate abuts against the outer wall of the extrusion mechanism.

3. A temperature measuring device for a twin-screw extruder according to claim 1, characterized in that: The outer walls of the sealed housing (20), the air guide pipe (401), and the exhaust pipe (405) are all provided with a thermal insulation layer.

4. A temperature measuring device for a twin-screw extruder according to claim 1, characterized in that: The air guide mechanism comprises a blower (30), the blower (30) having an air exhaust end and an air inlet end, the air exhaust end being connected to the sealed heat exchange chamber.

5. A temperature measuring device for a twin-screw extruder according to claim 1, characterized in that: The extrusion mechanism comprises an extrusion tube (10), wherein two pushing screws rotating in opposite directions are arranged inside the extrusion tube (10).

6. A temperature measuring device for a twin-screw extruder according to claim 5, characterized in that: A detection port (103) is provided on one side of the extrusion tube (10) close to the discharge end (102), a sealing cover (40) is fixedly connected to the detection port (103), a pressure sensor is provided on the sealing cover (40), and a pressure display (404) for receiving a pressure sensor signal is provided on the sealing cover (40).

7. A temperature measuring device for a twin-screw extruder according to claim 6, characterized in that: The air guide tube (401) is fixed on the sealing cover (40), and the temperature measurement component comprises a thermometer (403). The thermometer (403) has a temperature measurement probe, and the temperature measurement probe is connected to the air guide tube (401) through a thread.

8. A temperature measuring device for a twin-screw extruder according to claim 5, characterized in that: A protective cover (50) is provided outside the extrusion tube (10).

9. A temperature measuring device for a twin-screw extruder according to claim 7, characterized in that: The thermometer (403) and the pressure display (404) are both located outside the protective cover (50).

10. The temperature measuring device for a twin-screw extruder according to claim 1, characterized in that: The feed end (101) is connected to a feed assembly, a feed pipe (1011) of the feed assembly, the feed pipe (1011) is connected to the feed end (101) via a flange, and a hopper (1012) is provided on the feed pipe (1011).

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