Roller kiln electric heating element capable of replacing multiple partitions on line

Abstract

The utility model discloses a multi-partition roller kiln electric heating element capable of being replaced on line, which solves the technical problems of non-uniform temperature in the kiln width direction, temperature difference between two sides of a kiln body and the middle of the kiln and the like in the prior art, and is characterized in that three electric heating wires are arranged on a ceramic rod in sections, and one electric heating wire is arranged at each of two ends of the ceramic rod; binding posts are led out from the two ends of the exterior of the ceramic rod respectively, the middle electric heating wire is led out from the interior of the ceramic rod through a hole in the middle of the ceramic rod, each section of electric heating wire controls a temperature interval, temperature is controlled in multiple groups in the width direction of the kiln, the three binding posts do not make contact with one another and are independently wired, the electric heating wires can be replaced by independently drawing out the ceramic rod and the electric heating wires on line, and overhauling is convenient. A good electric heating element fixing mode and a good electric heating element grouping mode are provided for the roller kiln, the temperature uniformity of the section of the kiln is improved, the productivity is greatly improved, compared with other electric heating wire arrangement modes, the production cost is greatly saved, and the electric heating roller kiln can be widely applied to electric heating roller kilns.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the electric heating element of thermal engineering, especially, it relates to a kind of electric heating element of multi-partitioned roller kiln that can be replaced on line, which can reduce the cross-section temperature difference of roller kiln, improve production efficiency and reduce maintenance cost. BACKGROUND

[0002] The electric heating element of electric heating roller kiln is generally single ceramic rod sleeve single electric heating wire, which is inserted from one side of kiln wall, and the whole electric heating wire is arranged horizontally in hearth, because the heat dissipation of both sides and middle of hearth is not the same, it involves the problem of reducing temperature difference in the width direction of kiln, currently, single electric heating wire is inserted into hearth from one side of kiln wall, and the temperature of both sides and middle of hearth in the width direction of kiln is not the same, which leads to uneven heating of product in the same cross-section, seriously affecting product quality and qualification rate. SUMMARY

[0003] The utility model aims at providing a kind of electric heating element of multi-partitioned roller kiln that can be replaced on line, which has scientific and reasonable structure, good protection performance, is convenient to replace on line and saves maintenance cost.

[0004] The technical scheme of the utility model is as follows: it includes ceramic rod and electric heating wire etc., the ceramic rod is hollow tubular structure, hole is arranged in the middle of ceramic rod, and three electric heating wires are arranged in sections.The left electric heating wire and right electric heating wire are respectively spirally wound in the left and right ends of ceramic rod, and left electric heating wire terminal and right electric heating wire terminal are respectively led out from the outside of left and right ends of ceramic rod, middle electric heating wire is spirally wound in the middle of ceramic rod, and terminal is led out from the inside of ceramic rod through the hole arranged in the middle of ceramic rod, and it is insulated from left and right electric heating wires.The left electric heating wire, middle electric heating wire and right electric heating wire can be grouped for temperature control along the width direction of kiln.

[0005] The utility model has the advantages of scientific and reasonable structure, good protection performance, convenient replacement on line, saving maintenance cost and the like, and can be widely applied to electric heating roller kiln.

[0006] The utility model will be further described below in combination with the drawings. DRAWINGS

[0007] Figure 1 It is the front view structural schematic diagram of the utility model;

[0008] Figure 2 It is the left view structural schematic diagram of the utility model.

[0009] In the figure: 1 is the middle heating wire terminal, 2 is the left heating wire terminal, 3 is the porcelain rod, 4 is the left heating wire, 5 is the middle heating wire, 6 is the right heating wire, and 7 is the right heating wire terminal. DETAILED DESCRIPTION

[0010] Taking the construction of a 60-meter roller kiln as an example, the kiln is 1.5 meters wide with a pitch of 2 meters. It consists of the kiln body, electric heating elements, etc. Each individual electric heating element is composed of a porcelain rod 3 and a heating wire. The porcelain rod 3 is a hollow tubular structure with a hole set in the middle of the porcelain rod 3. Three heating wires are arranged in sections. The left heating wire 4 and the right heating wire 6 are spirally wound around the left and right ends of the porcelain rod 3, respectively. At the same time, the left heating wire terminal 2 and the right heating wire terminal 7 are led out from the left and right ends of the porcelain rod 3 respectively. The middle heating wire 5 is spirally wound around the middle of the porcelain rod 3. The terminal 1 is led out from the inside of the porcelain rod through the hole set in the middle of the porcelain rod 3. It is insulated from the left and right heating wires. The left heating wire 4, the middle heating wire 5, and the right heating wire 6 are divided into three groups along the width of the kiln for temperature control. When the temperature in a certain zone across the kiln width falls below the process temperature, the heating wire in that zone automatically increases heating power, and vice versa, reducing it to maintain a uniform temperature within the furnace. Because the three terminal blocks are independent and non-contacting, the porcelain rod and heating wire can be individually removed online for wire replacement, facilitating maintenance. This design not only provides an optimal method for securing and grouping heating elements in roller hearth kilns, improving temperature uniformity across the kiln cross section, but also significantly increases productivity. Compared to other heating wire arrangements, it significantly reduces production costs, making it suitable for a wide range of applications in electrically heated roller hearth kilns.

Claims

1. An electric heating element for a roller kiln with multiple zones that can be replaced online, comprising a porcelain rod (3) and a heating wire, characterized in that: The porcelain rod (3) is a hollow tubular structure. A hole is provided in the middle of the porcelain rod (3), and three heating wires are arranged in sections. The left heating wire (4) and the right heating wire (6) are respectively spirally wound around the left and right ends of the porcelain rod (3). At the same time, the left heating wire terminal (2) and the right heating wire terminal (7) are respectively led out from the left and right ends of the porcelain rod (3). The middle heating wire (5) is spirally wound around the middle of the porcelain rod (3). The terminal (1) is led out from the inside of the porcelain rod through the hole provided in the middle of the porcelain rod (3). The heating wire is insulated from the left and right heating wires. The left heating wire (4), the middle heating wire (5) and the right heating wire (6) are grouped along the kiln width direction for temperature control.

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