Heating plate of tire vulcanizing machine

Abstract

The utility model discloses a heating plate of a tire vulcanizing machine, which belongs to the technical field of tire vulcanizing equipment and comprises a plate body, at least one heating area is arranged on the plate body, each heating area comprises three circumferentially distributed heating parts, each heating part comprises a plurality of electric heating elements, and the electric heating elements are arranged on the plate body. Each electric heating element comprises a plurality of curve sections and / or linear sections which are connected in sequence, and the electric heating elements are fully distributed on the heating part and can uniformly heat the heating part; the impedance of the heating parts belonging to the same heating area is equal; the electric heating elements of the three heating parts are respectively coupled with a symmetrical three-phase power supply to form a symmetrical three-phase circuit; according to the utility model, each heating area on the plate body is designed into three heating parts with equal impedance, the three heating parts are coupled with the symmetrical three-phase power supply to form a symmetrical three-phase circuit, the electric heating elements are reasonably arranged, any two-phase load balance can be ensured, and the reasonable layout of the tire vulcanizing machine in a tire vulcanizing workshop is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of tire vulcanizing equipment, in particular to a heating plate of a tire vulcanizing machine. Background Art

[0002] Tire vulcanizer is an indispensable equipment in the tire vulcanization process. Specifically, the tire vulcanizer provides a high temperature environment for the tire blank through a heating plate. Traditional tire vulcanizers usually require continuous and uninterrupted high-temperature steam to maintain a high temperature environment. The steam temperature in this process is difficult to control, and the discharged water and steam still contain a large amount of heat. The heat carried in the steam cannot be fully utilized, the energy utilization rate is low, and the energy consumption is high. At the same time, steam heating requires the configuration of a large boiler, the thermal pipeline is complex, and the heating cost and subsequent maintenance cost are high.

[0003] At present, some tire manufacturers have begun to use electric heating instead of steam heating. Specifically, the electric heating tube is embedded in the heating plate of the tire vulcanizer, and the alternating current is used to achieve resistance heating. The electric heating tube is connected to two phases of the three-phase power supply. If the electric heating tube is not arranged properly, the problem of load imbalance is prone to occur. When multiple tire vulcanizers are running at the same time, the load imbalance will have a great impact on the power grid of the tire vulcanization workshop.

[0004] Therefore, designing a tire vulcanizer heating plate with a reasonable arrangement of electric heating tubes and balanced loads on any two phases is a problem that needs to be solved urgently at this stage. Utility Model Content

[0005] In order to solve the problems existing in the prior art, the utility model provides a tire vulcanizer heating plate, in which each heating zone on the plate is designed as three heating parts with equal impedance, and the three heating parts are coupled with a symmetrical three-phase power supply to form a symmetrical three-phase circuit. The electric heating elements are arranged reasonably to ensure the load balance of any two phases, which is conducive to the reasonable layout of the tire vulcanizer in the tire vulcanization workshop.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] The utility model provides a tire vulcanizer heating plate, comprising:

[0008] A plate body, wherein at least one heating zone is provided on the plate body, each of the heating zones comprises three circumferentially distributed heating parts, each of the heating parts comprises a plurality of electric heating elements, and the electric heating elements comprise a plurality of curved segments and / or straight segments connected in sequence, and the electric heating elements are distributed all over the heating parts so as to heat the heating parts uniformly; the impedances of the heating parts belonging to the same heating zone are all equal;

[0009] The electric heating elements of the three heating parts are respectively coupled to a symmetrical three-phase power supply to form a symmetrical three-phase circuit.

[0010] As a preferred technical solution, the plate body includes an upper heating plate and a lower heating plate.

[0011] As a preferred technical solution, at least one temperature measuring element is provided in the plate body.

[0012] As a preferred technical solution, the temperature measuring element is configured as a temperature sensor.

[0013] As a preferred technical solution, the heating zone is ring-shaped; when there are multiple heating zones, the multiple heating zones are distributed radially.

[0014] As a preferred technical solution, the electric heating element is embedded in the plate body.

[0015] As a preferred technical solution, the heating parts belonging to the same heating zone have the same shape and are evenly distributed circumferentially;

[0016] And / or, the heating portion is fan-shaped.

[0017] As a preferred technical solution, the electric heating element is configured as an electric heating tube.

[0018] As a preferred technical solution, the electric heating elements are distributed in a continuous S shape.

[0019] As a preferred technical solution, the length, cross-sectional area, resistivity and coverage area of ​​the electric heating elements belonging to the same heating zone are the same.

[0020] The beneficial effects of the utility model are as follows:

[0021] 1. Each heating zone on the plate of the utility model is designed as three heating parts with equal impedance. The three heating parts are coupled with a symmetrical three-phase power supply to form a symmetrical three-phase circuit. The electric heating elements are arranged reasonably to ensure load balance between any two phases, which is conducive to the reasonable layout of the tire vulcanizer in the tire vulcanization workshop.

[0022] 2. The electric heating element of the utility model can be directly installed on the plate body. Heating can be achieved by connecting the wire of the electric heating element to the power supply. Steam and its thermal pipeline are no longer required, the energy utilization rate is high, and the production cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a tire vulcanizer heating plate of the utility model;

[0024] Figure 2 for Figure 1 A cross-sectional view of the plate along the AA direction;

[0025] Figure 3 for Figure 1 Cross-sectional view at the middle temperature measuring hole;

[0026] Figure 4 for Figure 1 A schematic diagram of an electrical connection between the electric heating element of the middle inner ring heating zone and a symmetrical three-phase power supply;

[0027] Figure 5 for Figure 1 Schematic diagram of another electrical connection between the electric heating element in the middle inner ring heating zone and the symmetrical three-phase power supply.

[0028] In the figure: 1-plate body, 11-temperature measuring hole, 2-heating zone, 21-inner ring heating zone, 22-outer ring heating zone, 3-heating part, 4-electric heating element, 5-symmetrical three-phase power supply, 6-temperature measuring element. DETAILED DESCRIPTION

[0029] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0030] Embodiment 1

[0031] Please refer to Figure 1-Figure 4 , is an embodiment of a tire vulcanizer heating plate provided by the utility model, comprising: a circular plate body 1, two heating zones 2 are arranged on the plate body 1, and the two heating zones 2 are both annular and nested inside and outside; four electric heating elements 4 in the outer ring heating zone 22 form a heating portion 3, and two electric heating elements 4 in the inner ring heating zone 21 form a heating portion 3; each electric heating element 4 is connected in sequence by a plurality of curved segments to form an S shape, and all the electric heating elements 4 are embedded in the plate body 1 and evenly distributed on the plate body 1, which can ensure the uniformity of the heating temperature of the plate body 1; the inner ring heating The impedances of the three heating parts 3 of the hot zone 21 are all equal, and the electric heating elements belonging to the same heating part 3 are connected in series in sequence; the three heating parts 3 of the inner ring heating zone 21 are connected end to end in sequence, and the end-to-end connection points of the three heating parts 3 are respectively coupled with the three phase lines of the symmetrical three-phase power supply 5 to form a symmetrical three-phase circuit; similarly, the three heating parts 3 of the outer ring heating zone 22 are also connected end to end in sequence, and the end-to-end connection points of the three heating parts 3 are respectively coupled with the three phase lines of the symmetrical three-phase power supply 5 to form a symmetrical three-phase circuit; the load balance of any two phases during the tire vulcanization process can be effectively guaranteed.

[0032] In other embodiments, the heating zone 2 on the plate body 1 can also be set to one or more than two, ensuring that each heating zone 2 can be divided into three heating parts 3 with equal impedance; when there are multiple heating zones 2 on the plate body 1, the multiple heating zones 2 should be nested inside and outside and distributed radially.

[0033] In other embodiments, the number of the electric heating elements 4 included in the outer ring heating zone 22 and the inner ring heating zone 21 may also be other multiples of 3, so as to facilitate processing and form three heating parts 3.

[0034] In other embodiments, the electric heating element 4 may also include several straight line segments or be composed entirely of straight line segments connected in sequence so as to be evenly distributed on the plate body 1; the plate body 1 may also be processed with a placement groove matching the shape of the electric heating element 4, and the electric heating element 4 is fixed in the placement groove.

[0035] It should be noted that the plate body 1 generally comprises an upper heating plate and a lower heating plate, and the upper heating plate and the lower heating plate can heat the tire blank from above and below respectively.

[0036] In this embodiment, please refer to Figure 1 and Figure 3 , a temperature measuring hole 11 is provided in the plate body 11, and a temperature measuring element 6 can be placed in the temperature measuring hole 11, and the temperature measuring element 6 is used to measure the temperature of the plate body 1; the temperature measuring element 6 can be connected to the control system of the vulcanizer, and the control system of the vulcanizer can control the heating power of the electric heating element 4 according to the output signal of the temperature measuring element 6 to ensure that the temperature of the plate body 1 is maintained within a suitable temperature range; in other embodiments, a plurality of temperature measuring holes 11 can also be provided in the plate body 1, and a plurality of temperature measuring holes 11 are provided with temperature measuring elements 6, and a plurality of temperature measuring elements 6 can respectively measure the temperature information of different areas of the plate body 1, and the control system of the vulcanizer can adjust the power of the electric heating element 4 of the corresponding area according to the temperature information of different areas of the plate body 1, which can further improve the uniformity of the heating temperature of the plate body 1; further, the temperature measuring element 6 can also be connected to an independent controller, and the independent controller can adjust the heating power of the electric heating element 4 according to the temperature information measured by the temperature measuring element 6, and the independent controller can be a PLC or a single-chip microcomputer.

[0037] It should be noted that the temperature measuring element 6 is preferably configured as a temperature sensor or an electronic thermometer, and the electric heating element 4 is preferably configured as an electric heating tube.

[0038] In this embodiment, please refer to Figure 1 The shapes of the heating parts 3 belonging to the same heating zone 2 should be the same and evenly distributed circumferentially to ensure uniform heating; specifically, the heating parts 3 are all fan-shaped, and the fan-shaped heating parts 3 can better cover the plate body 1 when distributed circumferentially to ensure the uniformity of the heating temperature of the plate body 1; in other embodiments, the heating parts 3 can also be set to a triangle or a trapezoid, so as to be able to heat the plate body 1 evenly.

[0039] It should be noted that the length, cross-sectional area, resistivity and coverage area of ​​the electric heating elements 4 belonging to the same heating zone 2 are preferably set to be the same, which can ensure that the resistance of each electric heating element 4 is the same, and the heating power per unit area in the same radial area is equal, so that the temperature of the plate body 1 is more uniform, and the heat transferred to the tire blank is uniform, thereby reducing the phenomenon of over-vulcanization or under-vulcanization of the tire, and can conveniently achieve load balancing of any two phases while also facilitating production and processing; further, the length, cross-sectional area, resistivity and coverage area of ​​the electric heating elements 4 in different heating zones 2 can be different. By flexibly setting the parameters of the electric heating elements 4 in different areas, it can be more convenient to achieve the same heating power per unit area of ​​different radial distribution positions of the plate body 1, thereby ensuring uniform heating of the plate body 1.

[0040] Embodiment 2

[0041] Please refer to Figure 5 The main difference between this embodiment and the first embodiment is that one ends of the three heating parts 3 of the inner ring heating zone 21 are connected together, and the other ends of the three heating parts 3 are respectively coupled with the three phase lines of the symmetrical three-phase power supply 5 to form a symmetrical three-phase circuit; this method can also ensure the load balance of any two phases during the tire vulcanization process.

[0042] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A tire vulcanizer heating plate, characterized in that: include: A plate body, wherein at least one heating zone is provided on the plate body, each of the heating zones comprises three circumferentially distributed heating parts, each of the heating parts comprises a plurality of electric heating elements, and the electric heating elements comprise a plurality of curved segments and / or straight segments connected in sequence, and the electric heating elements are distributed all over the heating parts so as to heat the heating parts uniformly; the impedances of the heating parts belonging to the same heating zone are all equal; The electric heating elements of the three heating parts are respectively coupled to a symmetrical three-phase power supply to form a symmetrical three-phase circuit.

2. A tire vulcanizer heating plate according to claim 1, characterized in that: The plate body comprises an upper heating plate and a lower heating plate.

3. A tire vulcanizer heating plate according to claim 1, characterized in that: At least one temperature measuring element is arranged in the plate body.

4. A tire vulcanizer heating plate according to claim 3, characterized in that: The temperature measuring element is configured as a temperature sensor.

5. A tire vulcanizer heating plate according to claim 1, characterized in that: The heating zone is ring-shaped; when there are multiple heating zones, the multiple heating zones are distributed radially.

6. A tire vulcanizer heating plate according to claim 1, characterized in that: The electric heating element is embedded in the plate body.

7. A tire vulcanizer heating plate according to claim 6, characterized in that: The heating parts belonging to the same heating zone have the same shape and are evenly distributed circumferentially; And / or, the heating portion is fan-shaped.

8. A tire vulcanizer heating plate according to claim 1, characterized in that: The electric heating element is configured as an electric heating tube.

9. A tire vulcanizer heating plate according to claim 1, characterized in that: The electric heating elements are distributed in a continuous S shape.

10. A tire vulcanizer heating plate according to claim 1 or 9, characterized in that: The electric heating elements belonging to the same heating zone have the same length, cross-sectional area, resistivity and coverage area.

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