Temperature measuring mechanism for cross-linking extruder head and co-extrusion device

Abstract

The utility model belongs to the technical field of cable production, and discloses a temperature measuring mechanism for a cross-linking extruder head and a co-extrusion device. The temperature measuring mechanism for the crosslinking extruder head comprises a connecting piece and a temperature measuring piece, one end of the connecting piece is configured to be connected with the water outlet end of the water inlet pipe, and the other end of the connecting piece is configured to be connected with the water inlet end of the crosslinking extruder head; two ends of the communicating hole are respectively communicated with the water outlet end of the water inlet pipe and the water inlet end of the cross-linking extrusion machine head; the temperature measuring piece is fixed to the connecting piece in a penetrating mode and can make contact with water in the communicating hole. The connecting piece is arranged between the water outlet end of the water inlet pipe and the water inlet end of the cross-linking extrusion machine head, and the temperature measuring piece is in direct contact with water entering from the water inlet pipe, so that the hot melting temperature of raw materials can be effectively monitored, and the extrusion quality is prevented from being influenced. The connecting piece can realize a water passing function and also can realize an installation function of the temperature measuring piece. In addition, the temperature measuring mechanism for the cross-linking extruder head is positioned outside the cross-linking extruder head, so that the installation is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of cable production, in particular to a temperature measuring mechanism for a cross-linking extruder head and a co-extrusion device. Background Art

[0002] With the rapid development of the electric power industry and the increasing reliability of power supply, power cables using cross-linked polyethylene (XLPE) as the primary insulation material are currently the most widely used cables, covering all voltage levels from low voltage to medium-high voltage and ultra-high voltage. Medium-voltage cables using XLPE as the primary insulation material are generally produced using co-extrusion equipment, while medium- and high-voltage cables can be produced using catenary cross-linking production lines. Ultra-high voltage cables of 110kV and above are currently primarily produced using vertical tower cross-linking production lines.

[0003] When using a co-extrusion device to produce cables, it is necessary to use a heating component to convert the solid raw materials into fluids to facilitate the extrusion of the raw materials. At present, the heating component mainly heats the solid raw materials located in the cross-linked extruder head by supplying water. In this process, the continuous stability of the hot melt temperature of the raw materials is extremely important. If the hot melt temperature is abnormal, it will affect the extrusion quality and cause defects in the cable insulation layer. The existing technology uses a temperature measuring component to perform contact temperature measurement on the outer wall of the cross-linked extruder head. It only measures the temperature of the outer wall and cannot effectively monitor the hot melt temperature of the reaction raw materials. As a result, the temperature value measured by the temperature measuring component has a large error. When the temperature measuring component finds that the temperature is abnormal, the internal temperature of the fluid may have been abnormal for some time, and there is a high probability that the cable has problems. Utility Model Content

[0004] The purpose of the utility model is to provide a temperature measuring mechanism for a cross-linking extruder head and a co-extrusion device, which can effectively monitor the hot melt temperature of raw materials, detect temperature anomalies in time, and avoid affecting the extrusion quality.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] On the one hand, a temperature measuring mechanism for a cross-linking extruder head is provided, comprising:

[0007] A connecting piece, one end of which is configured to be connected to the water outlet end of the water inlet pipe, and the other end of which is configured to be connected to the water inlet end of the cross-linking extruder head; the connecting piece is provided with a communicating hole, and the two ends of the communicating hole are respectively connected to the water outlet end of the water inlet pipe and the water inlet end of the cross-linking extruder head;

[0008] The temperature measuring component is passed through and fixed to the connecting component and can contact the water in the communicating hole.

[0009] In some possible embodiments, one end of the connecting member is provided with a first external thread, which is threadedly connected to the water outlet end of the water inlet pipe, and the other end of the connecting member is provided with a second external thread, which is threadedly connected to the water inlet end of the cross-linking extruder head.

[0010] In some possible implementations, the connecting member is provided with a through hole, and the temperature measuring member is threadedly connected to the through hole.

[0011] In some possible embodiments, the connecting part includes a first connecting part, a second connecting part and a third connecting part arranged in sequence, the first connecting part is used to connect to the water inlet pipe, the second connecting part is used to connect to the temperature measuring part, and the third connecting part is used to connect to the cross-linking extruder head, and the inner diameters of the first connecting part and the third connecting part are the same and are both smaller than the inner diameter of the second connecting part.

[0012] In some possible implementations, a curved guide surface is provided at the water outlet of the second connecting portion.

[0013] In some possible implementations, two gripping grooves are provided on an outer wall of the second connecting portion in an opposite direction.

[0014] In some possible implementations, the temperature measuring element is a thermocouple.

[0015] On the other hand, a co-extrusion device is provided, comprising a water inlet pipe, a cross-linked extruder head, and a temperature measuring mechanism for the cross-linked extruder head as described in any of the above schemes, one end of the connecting piece is connected to the water outlet end of the water inlet pipe, and the other end of the connecting piece is connected to the water inlet end of the cross-linked extruder head; the two ends of the connecting hole are respectively connected to the water outlet end of the water inlet pipe and the water inlet end of the cross-linked extruder head.

[0016] In some possible embodiments, the co-extrusion device further includes a temperature control box and a water outlet pipe, the water outlet end of the temperature control box is connected to the water inlet end of the water inlet pipe, the cross-linking extruder head is provided with a water outlet end, the water inlet end of the water outlet pipe is connected to the water outlet end of the cross-linking extruder head, the water outlet end of the water outlet pipe is connected to the water inlet end of the temperature control box, and the temperature control box is communicatively connected to the temperature measuring component for controlling the temperature of water entering the water inlet pipe.

[0017] In some possible embodiments, the co-extrusion device further includes a wire mechanism, which includes a wire seat and a wire wheel. The wire wheel can rotate relative to the wire seat to pull the wire so that the wire is inserted into the wire inlet of the cross-linking extruder head.

[0018] Beneficial effects of the utility model:

[0019] The temperature measuring mechanism for a cross-linked extruder head provided by the utility model includes a connecting piece and a temperature measuring piece. The connecting piece is arranged between the water outlet end of the water inlet pipe and the water inlet end of the cross-linked extruder head, and the temperature measuring piece can directly contact the water entering from the water inlet pipe to measure the temperature. Since the cross-linked extruder head heats the raw materials through the water flow, the temperature measuring piece can accurately and effectively detect the hot melt temperature of the raw materials by monitoring the water temperature, and promptly detect the abnormality of the hot melt temperature, thereby reducing the error of the temperature value measured by the temperature measuring piece and avoiding affecting the extrusion quality. While the connecting piece realizes the water flow function, it can also realize the installation function of the temperature measuring piece. In addition, the temperature measuring mechanism for the cross-linked extruder head is located outside the cross-linked extruder head, which makes installation convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of a temperature measuring mechanism for a cross-linking extruder head provided by the present invention (temperature measuring element not shown);

[0021] Figure 2 It is a cross-sectional view of the temperature measuring mechanism for the cross-linking extruder head provided by the present invention (the temperature measuring component is not shown);

[0022] Figure 3 This is a schematic structural diagram of the co-extrusion device provided by the utility model;

[0023] Figure 4 yes Figure 3 A partial enlarged view of point A in the middle.

[0024] In the picture:

[0025] 1. Connecting piece; 11. Connecting hole; 12. First external thread; 13. Second external thread; 14. Through hole; 15. First connecting portion; 16. Second connecting portion; 161. Gripping groove; 17. Third connecting portion; 2. Temperature measuring element;

[0026] 100, water inlet pipe; 200, cross-linking extruder head; 201, feed funnel; 300, temperature control box; 400, wire mechanism; 401, wire holder; 402, wire wheel; 500, wire. DETAILED DESCRIPTION

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0028] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0029] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0030] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0031] like Figures 1 to 4As shown, the utility model provides a temperature measuring mechanism for a cross-linking extruder head, comprising a connector 1 and a temperature measuring member 2. One end of the connector 1 is configured to be connected to the water outlet end of a water inlet pipe 100, and the other end of the connector 1 is configured to be connected to the water inlet end of a cross-linking extruder head 200. The connector 1 is provided with a connecting hole 11, and the two ends of the connecting hole 11 are respectively connected to the water outlet end of the water inlet pipe 100 and the water inlet end of the cross-linking extruder head 200. The temperature measuring member 2 is fixed to the connector 1 and can contact the water in the connecting hole 11. The connector 1 is set between the water outlet end of the water inlet pipe 100 and the water inlet end of the cross-linking extruder head 200. The temperature measuring member 2 can directly contact the water entering from the water inlet pipe 100 to measure the temperature. Since the cross-linking extruder head 200 heats the raw materials through water flow, the temperature measuring member 2 can accurately and effectively detect the hot melt temperature of the raw materials by monitoring the water temperature, and promptly detect the abnormality of the hot melt temperature, thereby reducing the error of the temperature value measured by the temperature measuring member 2 and avoiding affecting the extrusion quality. The connecting piece 1 realizes the water-passing function and can also realize the installation function of the temperature measuring piece 2. In addition, the temperature measuring mechanism for the cross-linking extruder head is located outside the cross-linking extruder head 200, making installation convenient.

[0032] Optionally, in the present embodiment, one end of the connector 1 is provided with a first external thread 12, which is threadedly connected to the water outlet end of the water inlet pipe 100, and the other end of the connector 1 is provided with a second external thread 13, which is threadedly connected to the water inlet end of the cross-linked extruder head 200. By means of threaded connection, the connection between the connector 1 and the water inlet pipe 100 and the cross-linked extruder head 200 is firm, which can play a certain sealing role and is convenient for assembly and disassembly. In other embodiments, the two ends of the connector 1 are respectively welded, clamped or bonded to the water inlet pipe 100 and the cross-linked extruder head 200, and the connector 1 can be connected and fixed to the water inlet pipe 100 and the cross-linked extruder head 200, which is not limited to the present embodiment.

[0033] Optionally, in this embodiment, the connector 1 is provided with a through-hole 14, and the temperature measuring element 2 is threadedly connected to the through-hole 14. This threaded connection secures the connection between the temperature measuring element 2 and the connector 1, provides a certain sealing effect, and facilitates assembly and disassembly. In other embodiments, the temperature measuring element 2 can be welded, clamped, or bonded to the connector 1 to securely connect the temperature measuring element 2 to the connector 1, and this embodiment is not limiting.

[0034] Optionally, in this embodiment, the connector 1 includes a first connector 15, a second connector 16, and a third connector 17, which are sequentially arranged. The first connector 15 is used to connect to the water inlet pipe 100, the second connector 16 is used to connect to the temperature measuring element 2, and the third connector 17 is used to connect to the cross-linking extruder head 200. The inner diameters of the first and third connectors 15, 17 are the same and smaller than the inner diameter of the second connector 16. This arrangement allows the inner cavity of the second connector 16 to easily accommodate the temperature measuring element 2, allowing the temperature measuring head of the temperature measuring element 2 to better contact with water.

[0035] To ensure smooth flow of water from the inner cavity of the second connecting portion 16 into the inner cavity of the third connecting portion 17, a curved guide surface is optionally provided at the water outlet of the second connecting portion 16. Optionally, in this embodiment, the temperature measuring element 2 is a thermocouple, which offers advantages such as high measurement accuracy, a wide temperature measurement range, a simple and robust structure, rapid response, and affordability. Other types of contact temperature sensors may also be used as the temperature measuring element 2. Furthermore, in this embodiment, two gripping grooves 161 are disposed on the outer wall of the second connecting portion 16 in opposing relation. This arrangement facilitates gripping during installation of the connector 1.

[0036] like Figure 3 As shown, the utility model also provides a co-extrusion device, including a water inlet pipe 100, a cross-linking extruder head 200, and a temperature measuring mechanism for the cross-linking extruder head. One end of the connector 1 is connected to the water outlet end of the water inlet pipe 100, and the other end of the connector 1 is connected to the water inlet end of the cross-linking extruder head 200; the two ends of the connecting hole 11 are respectively connected to the water outlet end of the water inlet pipe 100 and the water inlet end of the cross-linking extruder head 200. The co-extrusion device can accurately and effectively detect the hot melt temperature of the raw materials by monitoring the water temperature, and promptly detect abnormalities in the hot melt temperature, thereby reducing the error of the temperature value measured by the temperature measuring member 2 and avoiding affecting the extrusion quality. In addition, the temperature measuring mechanism for the cross-linking extruder head is located outside the cross-linking extruder head 200, making installation convenient.

[0037] Optionally, in this embodiment, the co-extrusion device further includes a temperature control box 300 and a water outlet pipe. The water outlet end of the temperature control box 300 is connected to the water inlet end of the water inlet pipe 100. The cross-linked extruder head 200 is provided with a water outlet end. The water inlet end of the water outlet pipe is connected to the water outlet end of the cross-linked extruder head 200. The water outlet end of the water outlet pipe is connected to the water inlet end of the temperature control box 300. The temperature control box 300 is communicatively connected to the temperature measuring element 2 for controlling the temperature of the water entering the water inlet pipe 100. When the water temperature is too high, the temperature measuring element 2 transmits a signal to the temperature control box 300. The temperature control box 300 lowers the water temperature through an internal cooling structure, and then injects the cooled water into the cross-linked extruder head 200. The high-temperature water in the cross-linked extruder head 200 flows back to the temperature control box 300 through the water outlet pipe to cool the high-temperature water.

[0038] Optionally, in this embodiment, the coextrusion device further includes a wire mechanism 400, which includes a wire holder 401 and a wire pulley 402. The wire pulley 402 is rotatable relative to the wire holder 401 and is used to pull the wire 500 so that the wire 500 is inserted into the wire inlet of the cross-linking extruder head 200. The wire pulley 402 pulls the wire 500, allowing the wire 500 to enter the wire inlet of the cross-linking extruder head 200 straightly for coating with an outer insulating layer. In this embodiment, the cross-linking extruder head 200 includes three coextrusion components, each of which is used to extrude a conductor shielding layer, a cross-linked polyethylene insulation layer, and an insulating shielding layer. Each of the three coextrusion components is equipped with a feed hopper 201 for adding solid raw materials. The outer periphery of the wire 500 is coated with the conductor shielding layer, the cross-linked polyethylene insulation layer, and the insulating shielding layer in sequence from the inside out.

[0039] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A temperature measuring mechanism for a cross-linking extruder head, characterized in that: include: A connecting piece (1), one end of the connecting piece (1) is configured to be connected to the water outlet end of the water inlet pipe (100), and the other end of the connecting piece (1) is configured to be connected to the water inlet end of the cross-linking extruder head (200); the connecting piece (1) is provided with a communicating hole (11), and the two ends of the communicating hole (11) are respectively connected to the water outlet end of the water inlet pipe (100) and the water inlet end of the cross-linking extruder head (200); The temperature measuring component (2) is fixed to the connecting component (1) and is capable of contacting the water in the communicating hole (11).

2. The temperature measuring mechanism for a cross-linking extruder head according to claim 1, characterized in that: One end of the connecting piece (1) is provided with a first external thread (12), which is threadedly connected to the water outlet end of the water inlet pipe (100), and the other end of the connecting piece (1) is provided with a second external thread (13), which is threadedly connected to the water inlet end of the cross-linking extruder head (200).

3. The temperature measuring mechanism for a cross-linking extruder head according to claim 1, characterized in that: The connecting piece (1) is provided with a through hole (14), and the temperature measuring piece (2) is threadedly connected to the through hole (14).

4. The temperature measuring mechanism for a cross-linking extruder head according to claim 1, characterized in that: The connecting member (1) comprises a first connecting portion (15), a second connecting portion (16) and a third connecting portion (17) which are arranged in sequence, wherein the first connecting portion (15) is used to connect to the water inlet pipe (100), the second connecting portion (16) is used to connect to the temperature measuring member (2), and the third connecting portion (17) is used to connect to the cross-linking extruder head (200), and the inner diameters of the first connecting portion (15) and the third connecting portion (17) are the same in size and are both smaller than the inner diameter of the second connecting portion (16).

5. The temperature measuring mechanism for a cross-linking extruder head according to claim 4, characterized in that: An arc-shaped guide surface is provided at the water outlet of the second connecting portion (16).

6. The temperature measuring mechanism for a cross-linking extruder head according to claim 4, characterized in that: The outer wall of the second connecting portion (16) is provided with two gripping grooves (161) facing each other.

7. The temperature measuring mechanism for a cross-linking extruder head according to any one of claims 1 to 6, characterized in that: The temperature measuring element (2) is a thermocouple.

8. A co-extrusion device, characterized in that: It comprises a water inlet pipe (100), a cross-linking extruder head (200) and a temperature measuring mechanism for a cross-linking extruder head as described in any one of claims 1 to 7, one end of a connecting piece (1) is connected to the water outlet end of the water inlet pipe (100), and the other end of the connecting piece (1) is connected to the water inlet end of the cross-linking extruder head (200); and both ends of a connecting hole (11) are respectively connected to the water outlet end of the water inlet pipe (100) and the water inlet end of the cross-linking extruder head (200).

9. The coextrusion device according to claim 8, characterized in that: The co-extrusion device further comprises a temperature control box (300) and a water outlet pipe, the water outlet end of the temperature control box (300) is connected to the water inlet end of the water inlet pipe (100), the cross-linking extruder head (200) is provided with a water outlet end, the water inlet end of the water outlet pipe is connected to the water outlet end of the cross-linking extruder head (200), the water outlet end of the water outlet pipe is connected to the water inlet end of the temperature control box (300), and the temperature control box (300) is communicatively connected to the temperature measuring element (2) for controlling the temperature of water entering the water inlet pipe (100).

10. The co-extrusion device according to claim 8, characterized in that: The co-extrusion device further comprises a wire mechanism (400), wherein the wire mechanism (400) comprises a wire seat (401) and a wire wheel (402), wherein the wire wheel (402) is rotatable relative to the wire seat (401) and is used to pull the wire (500) so that the wire (500) is inserted into the wire inlet of the cross-linking extruder head (200).

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