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, and three or more mounting holes are formed in the outer edge of the plate body; each heating module comprises a plurality of electric heating elements, the electric heating elements are in one-to-one correspondence with the mounting holes, and the electric heating elements are arranged in the mounting holes; the electric heating elements belonging to the same heating module are sequentially connected in series; the total impedance of the three heating modules is equal; the three heating modules are respectively coupled with a symmetrical three-phase power supply to form a symmetrical three-phase circuit; according to the utility model, the electric heating element is placed in the mounting hole at the outer edge of the plate body, so that the electric heating element can be taken out for maintenance under the condition that the plate body is not disassembled; all the electric heating elements form three heating modules with the same total impedance, and the three heating modules are coupled with a symmetrical three-phase power supply to form a symmetrical three-phase circuit, so that the 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] In the tire production process, tire vulcanization is an important process that requires the use of a tire vulcanizer. The hot plate and mold sleeve of the tire vulcanizer need to be continuously fed with high-temperature steam to provide a high-temperature environment for the vulcanization of the tire blank. During this process, the discharged water and steam still contain a large amount of heat, which cannot be fully utilized, resulting in high energy consumption and low energy utilization.

[0003] At present, in order to improve energy utilization, some tire manufacturers have begun to use electric heating instead of steam heating. Specifically, the heating tube is embedded in the heating plate of the tire vulcanizer. The heating tube is usually distributed in concentric circles on the heating plate. When the heating tube is abnormal, the heating plate must be removed and disassembled, which places high demands on on-site maintenance personnel and a large workload. At the same time, due to the different resistance values ​​of the concentrically distributed heating tubes; when multiple heating tubes with different resistance values ​​are connected to a three-phase AC power supply, the loads of each phase of the three-phase AC power supply are different and the difference is large, which has a greater impact on the power grid.

[0004] Therefore, designing an electrically heated tire vulcanizer heating plate that is easy to maintain and has a balanced load 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 the electric heating elements are placed in the mounting holes on the outer edge of the plate body, and the electric heating elements can be taken out for maintenance without disassembling the plate body; all the electric heating elements form three heating modules with equal total impedance, and the three heating modules are coupled with a symmetrical three-phase power supply to form a symmetrical three-phase circuit, which can ensure load balance and will not cause impact on the power grid, 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 three or more mounting holes are provided at the outer edge of the plate body;

[0009] Three heating modules, each of which comprises a plurality of electric heating elements, the electric heating elements correspond to the mounting holes one by one, and the electric heating elements are arranged in the mounting holes; the electric heating elements belonging to the same heating module are connected in series in sequence; the total impedance of the three heating modules is equal;

[0010] The three heating modules are respectively coupled to a symmetrical three-phase power supply to form a symmetrical three-phase circuit.

[0011] As a preferred technical solution, the plate body is circular, and a circumferentially arranged wiring groove is provided at the outer edge of the plate body, and the openings of the mounting holes are all located in the wiring groove.

[0012] As a preferred technical solution, a cover plate is provided at the notch of the wiring slot, and the cover plate is fixedly connected to the outer edge of the plate body;

[0013] And / or, the depth of the wiring groove is not greater than 50 mm.

[0014] As a preferred technical solution, the electric heating element is cylindrical, and the electric heating element is loosely matched with the mounting hole; a positioning piece is provided at one end of the electric heating element, and the positioning piece can be fixed in the wiring slot.

[0015] As a preferred technical solution, the plate body has a plurality of circumferentially distributed heating zones, each of the heating zones has three or more mounting holes, and the total impedance of the electric heating elements of the three heating modules distributed in each of the heating zones is equal.

[0016] As a preferred technical solution, the axes of the mounting holes in the same heating zone are parallel to or intersecting with each other; when the axes of the mounting holes in the same heating zone are parallel to each other, the distance between adjacent electric heating elements is set to 30 mm-200 mm;

[0017] And / or, the lengths of the mounting holes located in the same heating zone are the same or different.

[0018] As a preferred technical solution, the plate body has an inner hole, and the minimum distance between the bottom of the mounting hole and the wall of the inner hole is set to 10 mm-100 mm.

[0019] As a preferred technical solution, the plate body includes an upper heating plate and a lower heating plate;

[0020] And / or, a heat insulation board is provided on one side of the plate body.

[0021] As a preferred technical solution, at least one temperature measuring element is provided in the plate body.

[0022] As a preferred technical solution, the electric heating element is configured as a heating tube;

[0023] And / or, the cross-sectional areas and resistivities of all the electric heating elements are the same, and the lengths of all the electric heating elements are the same or different.

[0024] The beneficial effects of the utility model are as follows:

[0025] 1. The electric heating element of the utility model is placed in the installation hole on the outer edge of the plate body. The electric heating element can be taken out for maintenance without disassembling the plate body; at the same time, all the electric heating elements form three heating modules with equal total impedance. The three heating modules are coupled with a symmetrical three-phase power supply to form a symmetrical three-phase circuit, which can ensure load balance and will not cause impact on the power grid, which is conducive to the reasonable layout of the tire vulcanizer in the tire vulcanization workshop.

[0026] 2. When the utility model is used for the tire vulcanization process, steam and thermal pipelines are no longer needed, the energy utilization rate is higher, and the production cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a tire vulcanizer heating plate of the utility model;

[0028] Figure 2 for Figure 1 Sectional view along AA direction;

[0029] Figure 3 for Figure 1 Side view in mid-P direction;

[0030] Figure 4 for Figure 1 Schematic diagram of the structure of the electric heating element;

[0031] Figure 5 for Figure 1 A schematic diagram of an electrical connection between an electric heating element in a heating zone and a symmetrical three-phase power supply;

[0032] Figure 6 for Figure 1 Another schematic diagram of electrical connection between an electric heating element in a heating zone and a symmetrical three-phase power supply.

[0033] In the figure: 1-plate body, 11-mounting hole, 12-wiring slot, 13-cover plate, 14-heating zone, 2-electric heating element, 3-positioning sheet, 31-positioning hole, 4-insulation board, 5-temperature measuring element. DETAILED DESCRIPTION

[0034] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0035] Embodiment 1

[0036] Please refer to Figure 1-Figure 5 , is an embodiment of a tire vulcanizer heating plate provided by the utility model, comprising: a circular plate body 1, the plate body 1 is evenly divided into four heating zones 14 along its circumference (as shown in FIG. Figure 1 ), each heating zone 14 is fan-shaped with an angle of 90°; ten mounting holes 11 are arranged at the outer edge of the plate body 1 corresponding to each heating zone 14, wherein the ten mounting holes 11 are divided into two symmetrically distributed parts, the axes of the mounting holes 11 belonging to the same part are parallel and spaced at the same interval, the lengths of the mounting holes 11 belonging to the same part are different, and the length of the electric heating element 2 placed in the mounting hole 11 matches the depth of the mounting hole 11, so that the electric heating element 2 can be distributed as evenly as possible in the plate body 1 to ensure the uniformity of heating; at the same time, the ten electric heating elements 2 in each heating zone 14 belong to three heating modules, and the electric heating elements 2 belonging to the same heating module are connected in series in sequence, and the three heating modules are connected end to end in sequence, and the end to end connection of the three heating modules are respectively coupled with the three phase lines of the symmetrical three-phase power supply (UVW) to form a symmetrical three-phase circuit, which can effectively ensure the load balance during the tire vulcanization process.

[0037] In other embodiments, the number of heating zones 14 on the plate body 1 may also be other values, and the size of each heating zone 14 may also be different, so as to ensure that the plate body 1 is evenly heated; the number of mounting holes 11 in each heating zone 14 may also be other values, and the axes of the mounting holes 11 in each heating zone 14 may also intersect, such as the axes of the mounting holes 11 are all radially and centripetally arranged; the depth of the mounting holes 11 in each heating zone 14 may also be the same, so as to ensure that the electric heating elements 2 in each heating zone 14 are evenly distributed and can be evenly divided into three heating modules.

[0038] It should be noted that the plate body 1 should include an upper heating plate and a lower heating plate, the tire mold is arranged between the upper heating plate and the lower heating plate, and the upper heating plate and the lower heating plate heat the tire blank from the top and the bottom respectively; the electric heating element 2 is preferably set as a heating tube; the cross-sectional area and resistivity of all the electric heating elements 2 are the same, according to the resistance formula R=ρ·L / S, wherein R is resistance, ρ is resistivity, L is length, and S is cross-sectional area; when calculating and comparing the total impedance of all the electric heating elements 2 of each heating module, only the length parameter of the electric heating element 2 needs to be considered; the length of all the electric heating elements 2 matches the depth of the mounting hole 11.

[0039] In this embodiment, please refer to Figure 1 and Figure 2A circumferentially arranged wiring groove 12 is provided at the outer edge of the plate body 1, and the openings of the mounting holes 11 are all located in the wiring groove 12. When the electric heating element 2 is placed in the mounting hole 11, the wires used to supply power to the electric heating element 2 can be placed in the wiring groove 12; specifically, the depth x of the wiring groove 12 is not greater than 50 mm, which is convenient for processing and can accommodate all wires.

[0040] Based on the above examples, please refer to Figure 1 and Figure 2 A cover plate 13 is provided at the notch of the wiring slot 12, and the cover plate 13 is fixedly connected to the outer edge of the board body 1, which can prevent the wires from being exposed from the wiring slot 12; specifically, a plurality of fixing holes are provided on the cover plate 13, and fixing screws are provided in the fixing holes. A plurality of fixing screw holes are provided on the outer edge of the board body 1, and the fixing screws pass through the fixing holes and are threadedly connected with the fixing screw holes, which can effectively fix the cover plate 13 on the board body 1 and cover the wiring slot 12.

[0041] In this embodiment, please refer to Figure 3 The electric heating element 2 is cylindrical and is placed in the mounting hole 11 and is loosely matched with the mounting hole 11; a positioning piece 3 is provided at one end of the electric heating element 2, and the positioning piece 3 can be fixed in the wiring groove 12; specifically, the positioning piece 3 is fixed at one end of the electric heating element 2, and a positioning hole 31 is provided on the positioning piece 3, and a positioning screw is provided in the positioning hole 31, and a positioning screw hole is provided on the bottom wall of the wiring groove 12, and the positioning screw passes through the positioning hole 31 and is threadedly connected with the positioning screw hole, so that the electric heating element 2 can be effectively fixed in the mounting hole 11.

[0042] In this embodiment, please refer to Figure 1 In the same heating zone 14, the distance y between parallel and adjacent electric heating elements 2 is set to 30mm-200mm; the plate body 1 has an inner hole, and the minimum distance t between the bottom of the mounting hole 11 and the inner hole wall is set to 10mm-100mm; this can effectively ensure that the electric heating element 2 can heat the plate body 1 evenly.

[0043] In this embodiment, please refer to Figure 2 A heat insulation board 4 is provided on one side of the plate body 1, and the heat insulation board 4 can prevent the heat generated by the plate body 1 from being transferred away from the tire mold, thereby improving energy utilization; specifically, the heat insulation board 4 is preferably fixed to the plate body 1 using screws.

[0044] In this embodiment, please refer to Figure 1, a temperature measuring element 5 is provided in each heating zone 14 of the plate body 1, and the temperature measuring element 5 is used to measure the temperature of the plate body 1; the control system of the tire vulcanizer can control the power of the electric heating element 2 according to the temperature information measured by the temperature measuring element 5 to ensure that the temperature of the plate body 1 is maintained within a suitable temperature range; in other embodiments, the number of the temperature measuring elements 5 can also be other values, so as to accurately measure the temperature of each area of ​​the plate body 1; specifically, the temperature measuring element 5 is preferably set to a temperature sensor or an electronic thermometer.

[0045] Embodiment 2

[0046] Please refer to Figure 6 The main difference between this embodiment and the first embodiment is that one end of the three heating modules are connected together, and the other ends of the three heating modules are respectively coupled with the three phase lines of the symmetrical three-phase power supply (UVW) to form a symmetrical three-phase circuit. This method can also ensure the load balance of any two phases during the tire vulcanization process.

[0047] 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 three or more mounting holes are provided at the outer edge of the plate body; Three heating modules, each of which comprises a plurality of electric heating elements, the electric heating elements correspond to the mounting holes one by one, and the electric heating elements are arranged in the mounting holes; the electric heating elements belonging to the same heating module are connected in series in sequence; the total impedance of the three heating modules is equal; The three heating modules 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 is circular, and a circumferentially arranged wiring groove is provided at the outer edge of the plate body, and the openings of the mounting holes are all located in the wiring groove.

3. A tire vulcanizer heating plate according to claim 2, characterized in that: A cover plate is provided at the notch of the wiring slot, and the cover plate is fixedly connected to the outer edge of the plate body; And / or, the depth of the wiring groove is not greater than 50 mm.

4. A tire vulcanizer heating plate according to claim 2, characterized in that: The electric heating element is cylindrical and has a clearance fit with the mounting hole. A positioning piece is provided at one end of the electric heating element and can be fixed in the wiring slot.

5. A tire vulcanizer heating plate according to claim 1, characterized in that: The plate body is provided with a plurality of circumferentially distributed heating zones, each of the heating zones is provided with three or more mounting holes, and the total impedance of the electric heating elements of the three heating modules distributed in each of the heating zones is equal.

6. A tire vulcanizer heating plate according to claim 5, characterized in that: The axes of the mounting holes in the same heating zone are parallel to or intersecting with each other; when the axes of the mounting holes in the same heating zone are parallel to each other, the distance between adjacent electric heating elements is set to 30 mm-200 mm; And / or, the lengths of the mounting holes located in the same heating zone are the same or different.

7. A tire vulcanizer heating plate according to claim 1, characterized in that: The plate body is provided with an inner hole, and the minimum distance between the bottom of the mounting hole and the inner hole wall is set to 10mm-100mm.

8. 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; And / or, a heat insulation board is provided on one side of the plate body.

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

10. A tire vulcanizer heating plate according to claim 1, characterized in that: The electric heating element is configured as a heating tube; And / or, the cross-sectional areas and resistivities of all the electric heating elements are the same, and the lengths of all the electric heating elements are the same or different.

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