Electric heating disc for tire vulcanizing machine

Abstract

The utility model provides an electric heating plate for a tire vulcanizer, which comprises a heating plate body, at least one heating area is arranged on the heating plate body in a partitioned manner, and one or more heating components are arranged in each heating area. Wherein the heating assembly comprises a first heating element, a second heating element and a third heating element, and the first heating element, the second heating element and the third heating element are coupled with a three-phase power supply to form a three-phase circuit. According to the utility model, at least one group of heating assemblies comprising the first heating element, the second heating element and the third heating element are arranged in each area through the newly designed electric heating disc; the first heating element, the second heating element and the third heating element are used as a whole to be coupled with the three phase lines of the three-phase power supply to form a three-phase circuit, so that any two-phase loads are balanced, and the utilization rate of energy is improved.

Description

Technical Field

[0001] This utility model relates to the field of tire vulcanizing equipment, and in particular to an electric heating plate for a tire vulcanizing machine. Background Technology

[0002] The applicant has been dedicated to transforming traditional steam vulcanizing machines into tire vulcanizing technologies using pure nitrogen and electric heating. During this process, the applicant discovered that the existing arrangement of electric heating elements within the heating plate of the tire vulcanizing machine, connecting the heating elements to two phases of the three-phase power supply, easily leads to three-phase load imbalance. When multiple tire vulcanizing machines operate simultaneously, this load imbalance can have a significant impact on the power grid of the tire vulcanizing workshop. Summary of the Invention

[0003] To solve the above-mentioned technical problems, this utility model provides an electric heating plate for a tire vulcanizing machine, including a heating plate body. The heating plate body is divided into at least one heating area, and one or more heating components are provided in each heating area. The heating components include a first heating element, a second heating element, and a third heating element. The first heating element, the second heating element, and the third heating element are coupled with a three-phase power supply to form a three-phase circuit.

[0004] Preferably, the heating area is annular.

[0005] Preferably, the first heating element, the second heating element, and the third heating element each include a heating element body and a cold end, wherein the cold end includes a first cold end and a second cold end respectively disposed at both ends of the heating element body.

[0006] Preferably, the first heating element, the second heating element, and the third heating element are configured as arcs with the same radius and the same or different center positions.

[0007] Preferably, the first heating element, the second heating element, and the third heating element are arranged in an approximately U-shape.

[0008] Preferably, the first heating element, the second heating element, and the third heating element are arranged in an approximately S-shape or a combination of S-shapes.

[0009] Preferably, within the same heating area, the bodies of the first heating element, the second heating element, and the third heating element are approximately aligned and connected.

[0010] Preferably, the heating plate body is provided with a mounting groove, and the heating element is disposed in the mounting groove.

[0011] Preferably, the first heating element, the second heating element, and the third heating element have the same resistance.

[0012] Preferably, the first heating element, the second heating element, and the third heating element have the same resistivity, length, and cross-sectional area.

[0013] As can be seen from the above-disclosed technical content, the present invention mainly uses a newly designed electric heating plate to set at least one heating assembly including a first heating element, a second heating element and a third heating element in each area. The first heating element, the second heating element and the third heating element are coupled as a whole with the three phase lines of the three-phase power supply to form a three-phase circuit, so that the load of any two phases is balanced and the energy utilization rate is improved. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the first embodiment of the electric heating plate described in this utility model.

[0015] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle.

[0016] Figure 3 for Figure 1 A schematic diagram showing the electrical connection between the first, second, and third heating elements and the three-phase power supply in a delta configuration.

[0017] Figure 4 for Figure 1 A schematic diagram showing the electrical connection between the first, second, and third heating elements and the three-phase power supply in a heart-shaped configuration.

[0018] Figure 5 This is a schematic diagram of the second embodiment of the electric heating plate described in this utility model.

[0019] Figure 6 This is a schematic diagram of the electrical connection between the first heating element, the second heating element, and the third heating element in Figure 5 and the three-phase power supply in a delta configuration.

[0020] Figure 7 This is a schematic diagram of the electrical connection between the first heating element, the second heating element, and the third heating element in Figure 5 and the three-phase power supply in a heart-shaped configuration.

[0021] Figure 8 This is a schematic diagram of the third embodiment of the electric heating plate described in this utility model. Detailed Implementation

[0022] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0023] See appendix Figures 1 to 8As shown, this utility model discloses an electric heating plate 1 for a tire vulcanizing machine, including a heating plate body 10 with a hollow center. On one side of the heating plate body 10, at least one annular heating area is provided from the edge of the hollow structure 11 in the center of the heating plate body to the edge of the heating plate body 10. In each annular heating area, one or more heating components 20 are provided. The heating component 20 includes a first heating element 21, a second heating element 22, and a third heating element 23. The first heating element 21, the second heating element 22, and the third heating element 23 are coupled with a three-phase power supply 30 to form a three-phase circuit.

[0024] The heating plate body 10 of this utility model is provided with one or more heating components 20 in each annular heating area. The following embodiments and drawings are described using only one heating component 20 as an example. When multiple heating components 20 are provided in an annular heating area, the multiple heating components 20 are coupled to the three-phase power supply 30 in parallel. That is, the first heating element 21, the second heating element 22 and the third heating element 23 in each group of heating components 20 are coupled as a whole to the three phase lines of the three-phase power supply 30, so that the load of any two phases is balanced.

[0025] The first heating element 21, the second heating element 22, and the third heating element 23 of this utility model each include a heating element body (21M, 22M, 23M), a first cold end (21L, 22L, 23L), and a second cold end (21R, 22R, 23R). The first cold end and the second cold end are respectively disposed at both ends of the heating element body. The first heating element 21, the second heating element 22, and the third heating element 23, as well as the heating elements (referring to the first heating element 21, the second heating element 22, and the third heating element 23) and the three-phase power supply 30 are connected at the cold end of the heating element.

[0026] As a simple connection method, the first heating element 21, the second heating element 22, and the third heating element 23 can be set as arcs with the same center and radius, thus forming an approximate circle in the heating area. Since multiple heating elements are connected at the first cold end (21L, 22L, 23L) and the second cold end (21R, 22R, 23R), and the temperature at the first cold end (21L, 22L, 23L) and the second cold end (21R, 22R, 23R) is lower than the temperature at the heating element body (21M, 22M, 23M), when the heating elements form an approximate circle, the temperature at the first and second cold ends of the circle will be lower than the temperature at the heating element body, resulting in uneven temperature distribution on the heating plate and affecting the tire vulcanization quality. Figures 1 to 4 As shown, in order to solve the problem of uneven temperature distribution in the heating plate caused by the heating element forming an approximately circular shape, the first heating element 21, the second heating element 22, and the third heating element 23 of this invention are set as arcs with the same radius but different center positions, so that the first heating element 21, the second heating element 22, and the third heating element 23 form an approximately overlapping arrangement. Taking the first heating element 21 as a reference, the two ends of the first heating element 21 are respectively the first cold end 21L and the second cold end 21R. The approximately overlapping arrangement of this invention means that the first cold end 21L of the first heating element 21 is closer to the center C of the heating plate relative to the body 22M of the second heating element, and the second cold end 21R of the first heating element is farther away from the center C of the heating plate relative to the body 23M of the third heating element. In other words, within the annulus formed by the same heating area, the cold ends (21L, 21R) of the first heating element coincide with the bodies 22M and 23M of the second heating element, respectively; the cold ends (22L, 22R) of the second heating element coincide with the bodies 23M and 21M of the third heating element, respectively; and the cold ends (23L, 23R) of the third heating element coincide with the bodies 21M and 22M of the first and second heating elements, respectively. The coincidence described in this invention does not refer to complete positional overlap, but rather to positional overlap on the circumference of the heating area, although they are located at different positions radially within the heating area.

[0027] The more cold ends of the heating elements on the heating plate, the more wiring joints there are, making them more prone to failure. Therefore, to reduce the number of wiring joints and thus reduce potential points of failure, such as... Figures 5 to 7As shown, as another distribution method of heating elements, the first heating element 21, the second heating element 22, and the third heating element 23 are approximately U-shaped. In this way, compared with the above-mentioned method in which the first heating element 21, the second heating element 22, and the third heating element 23 form an approximately circular structure, the first heating element 21, the second heating element 22, and the third heating element 23 can form two approximately circular structures, so that a set of heating components can be arranged over a larger area and with fewer wiring joints.

[0028] Preferably, to avoid uneven temperature distribution on the circumference of the heating area caused by the lower temperature of the first heating element 21, the second heating element 22, and the third heating element 23 at their cold end positions, the first heating element 21, the second heating element 22, and the third heating element 23 overlap at their cold end positions in any heating area. Here, overlapping at the cold end positions means that the cold end (22L, 22R) of the second heating element overlaps with the body 21M of the first heating element, the cold end (23L, 23R) of the third heating element overlaps with the body 22M of the second heating element, and the cold end (21L, 21R) of the first heating element overlaps with the body 23M of the third heating element. This ensures that the circumference of the heating area is covered by the bodies of the first heating element, the second heating element, and the third heating element, preventing a situation where there is only the cold end of the heating element at a certain position on the circumference without the body of the heating element. This makes the temperature on the circumference of the tire more uniform.

[0029] Furthermore, the first heating element 21, the second heating element 22, and the third heating element 23 can be distributed in an approximately S-shape or a combination of several S-shapes, thereby allowing for a larger arrangement range of a group of heating elements and fewer wiring connections. Similarly, to avoid the first heating element 21, the second heating element 22, and the third heating element 23 affecting the tire vulcanization quality due to lower temperatures at their cold ends, within the same heating area, the cold ends (21L, 21R) of the first heating element coincide with the bodies 22M and 23M of the second and third heating elements; the cold ends (22L, 22R) of the second heating element coincide with the bodies 21M and 23M of the first and third heating elements; and the cold ends (23L, 23R) of the third heating element coincide with the bodies 21M and 22M of the first and second heating elements.

[0030] In other words, regardless of how the first heating element 21, the second heating element 22, and the third heating element 23 are distributed, within the same heating area, the bodies and cold ends of the heating elements can be aligned in the aforementioned manner, so that the bodies 21M of the first heating element, the bodies 22M of the second heating element, and the bodies 23M of the third heating element are approximately aligned, thereby making the temperature distribution within the heating area uniform.

[0031] Preferably, the heating plate body 10 of the present invention is provided with a mounting groove (not shown) with the same shape as the heating element, and the heating element is disposed in the mounting groove.

[0032] Preferably, the first heating element 21, the second heating element 22, and the third heating element 23 within the same heating area of ​​the present invention have the same resistance, thereby ensuring uniform temperature within the same heating area and keeping the temperature consistent at different locations on the same circumference of the vulcanized tire, thus better meeting the vulcanization temperature requirements.

[0033] Preferably, the resistivity, length, and cross-sectional area of ​​the first heating element 21, the second heating element 22, and the third heating element 23 within the same heating area of ​​this invention are all the same, thereby better meeting the vulcanization temperature requirements under the premise that any two phases of the three-phase circuit are balanced. Of course, according to actual wiring needs, the first heating element 21, the second heating element 22, and the third heating element 23 can achieve the same resistance by using different resistivities, lengths, and cross-sectional areas.

[0034] The coupling methods of the first heating element 21, the second heating element 22, and the third heating element 23 with the three-phase power supply can be as follows: Figure 3 and 6 The triangle connection shown or as shown Figure 4 and 7 The heart-shaped connection shown.

[0035] This invention primarily utilizes a newly arranged heating assembly. By coupling the first, second, and third heating elements with the three phase lines of a three-phase power supply to form a three-phase circuit, any two phases can be balanced, improving energy utilization. By arranging the first, second, and third heating elements in a U-shape, S-shape, or a combination of S-shapes, the number of cold ends of the heating elements is reduced, thus reducing the failure rate of the joints. Within the same heating area, the cold ends of the heating elements coincide with the body of the heating elements, ensuring that the circumference of the heating area is covered by the body of the heating elements, thereby making the temperature around the tire's circumference similar.

[0036] The above description is only a partial embodiment of this application, and its purpose is to illustrate the technical concept and features of this application. Any equivalent changes or alternative technical solutions that can be easily conceived by those skilled in the art under the guidance of the technical content of this application should be included within the protection scope of this application. Therefore, the protection scope of this application should be determined by the protection scope of the claims.

Claims

1. An electric heating disc for a tire curing press, characterized by, The heating disc body is divided into at least one heating area, and one or more heating components are arranged in each heating area, wherein the heating components include a first heating element, a second heating element and a third heating element, and the first heating element, the second heating element and the third heating element are coupled with a three-phase power supply to form a three-phase circuit.

2. The electric heating disc according to claim 1, characterized in that, The heating area is annular.

3. The electrically heated pan of claim 1, wherein, The first heating element, the second heating element and the third heating element each include a heating element body and a cold end, wherein the cold end includes a first cold end and a second cold end arranged at both ends of the heating element body respectively.

4. The electrically heated pan of claim 3, wherein, The first heating element, the second heating element and the third heating element are arranged as arcs with the same radius, the same or different center positions.

5. The electrically heated pan of claim 3, wherein, The first heating element, the second heating element and the third heating element are approximately U-shaped.

6. The electrically heated pan of claim 3, wherein, The first heating element, the second heating element and the third heating element are approximately S-shaped or combined S-shaped.

7. The electrically heated pan according to any one of claims 4 to 6, characterized in that In the same heating area, the bodies of the first heating element, the second heating element and the third heating element are approximately butt-jointed.

8. The electric heating disc according to any one of claims 1 to 6, characterized in that, The heating disc body is provided with a mounting groove, and the heating elements are arranged in the mounting groove.

9. The electric heating disc according to any one of claims 1 to 6, characterized in that, The first heating element, the second heating element and the third heating element have the same resistance.

10. The electrically heated pan of claim 9, wherein, The first heating element, the second heating element and the third heating element have the same resistivity, length and cross-sectional area.

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