Zirconium oxide probe heater

Abstract

The utility model discloses a zirconia probe, and particularly relates to a zirconia probe heater. The furnace tube comprises a furnace tube body, the furnace tube body is a tubular electric furnace frame, wire penetrating holes are evenly distributed in the opposite positions of an upper installation face and a lower installation face of the furnace tube body, an annular channel is longitudinally formed in the furnace tube body, partition plates which are staggered up and down are arranged in the annular channel, and the adjacent partition plates are connected with the upper installation face and the lower installation face respectively. The two ends of the spiral electric heating wire are connected with the inlet wire and the outlet wire respectively, and the spiral electric heating wire is arranged in the annular channel of the furnace tube body and sequentially penetrates through the partition plates. The heating furnace is long in service life, the furnace tube body is insulated, heat-conducting and good in mechanical strength performance, the spiral electric heating wires circularly and oppositely penetrate into the channels separated by the partition plates in the furnace tube body, induced electromotive forces generated by the heating coils are mutually counteracted by utilizing induced electromotive forces generated in the same group in opposite directions at the same time, work of other elements is not interfered, and the service life of the heating furnace is prolonged. And the measurement accuracy is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a zirconium oxide probe, especially a zirconium oxide probe heater. BACKGROUND

[0002] The state is more and more strict to environmental protection requirement now, and the zirconium oxide probe is used in the instrument of environmental protection and energy saving, is widely used in power plant generation, chemical industry, heating boiler etc. field, and plays the role of "guarding" for the environmental protection of these industries. The zirconium oxide probe is an important part of zirconium oxide oxygen analyzer.

[0003] The detection principle of the zirconium oxide probe is based on oxygen concentration difference potential, and the oxygen content in the gas is reflected by measuring the potential signal generated by the oxygen concentration difference of the zirconium oxide ceramic on both sides. The zirconium oxide probe needs to work at high temperature, and the zirconium tube is heated to stable working temperature by heating element. The zirconium oxide electrode has the function of measuring oxygen content only after being heated to 700 DEG C. A coil heater is usually added to the outside of the electrode. It needs constant temperature, so the current on the coil will be frequently turned on and off. This will generate an induced electromotive force on the zirconium oxide electrode, which will interfere with the potential signal output by the zirconium oxide electrode. This interference cannot be eliminated, and the main technical problems are as follows: the potential signal output by the zirconium oxide electrode will cause the measured value to fluctuate up and down when the induced electromotive force electric field is generated; the thermocouple signal of the heater temperature control will cause the measured value to fluctuate up and down when the induced electromotive force electric field is generated; the oxygen content measured by the zirconium oxide is calculated by the Nernst equation, so the fluctuation of the two values will cause large error and large fluctuation of the measured value.

[0004] Therefore, it is a technical problem that needs to be solved by those skilled in the art to develop a long service life and a non-sensing heater that can eliminate the induced electromotive force electric field. SUMMARY

[0005] In order to solve the above technical problems, the utility model provides a kind of zirconium oxide probe heater, and the purpose is to prolong heater, eliminate the interference of induced electromotive force, improve the accuracy of measurement.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A kind of zirconium oxide probe heater, it includes furnace tube body, the furnace tube body is tubular electric furnace frame, and the upper mounting surface and the lower mounting surface of furnace tube body are uniformly distributed with threading hole at opposite positions, and the inside of furnace tube body is longitudinally provided with annular channel, and annular channel is provided with upper and lower staggered partition plates, and adjacent partition plates are connected with upper mounting surface and lower mounting surface respectively, and spiral heating wire two ends are connected with incoming line and outgoing line respectively, and spiral heating wire is arranged in the annular channel of furnace tube body, and spiral heating wire passes through partition plate in sequence.

[0008] Preferably, the inlet wire and the outlet wire are arranged in the same wire passing hole.

[0009] Preferably, the spiral heating wire is made of nickel-chromium alloy heating wire with a diameter of 0.4 mm.

[0010] Preferably, the spiral heating wire is wound into a spiral heating coil with a diameter of 3.0 mm and a turn spacing of 0.8 mm.

[0011] Preferably, the furnace tube body is made of high-alumina ceramic to form a tubular electric furnace frame with an outer diameter of 25 mm and an inner diameter of 14 mm.

[0012] Due to the above technical solutions, the utility model has the following beneficial effects:

[0013] The utility model discloses simple structure, and the service life of heater is longer, and the furnace tube body is used as the coil support frame structure and material, and the insulation, heat conduction, mechanical strength performance are considered, the spiral heating wire circulates, and the opposite passage in the furnace tube body is passed into the partition, and the induced electromotive force of the heating coil is offset each other by using the induced electromotive force of the same group direction opposite simultaneously, so that the normal use of heater can be achieved, and other components work is not disturbed, and the accuracy of measurement is improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a three-dimensional structure schematic view of the zirconia probe heater.

[0015] Figure 2 It is a top view structure schematic view of the zirconia probe heater.

[0016] Figure 3 It is a partial sectional view structure schematic view of the zirconia probe heater.

[0017] LEGEND:

[0018] 1, inlet wire, 2, outlet wire, 3, furnace tube body, 4, spiral heating wire, 5, upper mounting surface, 6, wire passing hole, 7, lower mounting surface, 8, partition. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0020] As Figure 1 - Figure 3As shown, the utility model discloses a zirconium oxide probe heater, and its structure is as follows: furnace pipe body 3 is a tubular electric furnace frame, the upper end surface of furnace pipe body 3 is upper mounting surface 5, the lower end surface of furnace pipe body 3 is lower mounting surface 7, and there are wire holes 6 uniformly distributed at the opposite positions on upper mounting surface 5 and lower mounting surface 7, Figure 2 As can be seen, seven wire holes 6 are arranged on the upper and lower parts respectively, which can not be used to limit the protection scope of the utility model, and can be adjusted according to specific requirements. A circular annular channel is longitudinally arranged in the inside of furnace pipe body 3, and the circular annular channel is provided with upper and lower staggered partition plates 8, adjacent partition plates 8 are connected with upper mounting surface 5 and lower mounting surface 7 respectively, and the two ends of spiral electric heating wire 4 are connected with incoming line 1 and outgoing line 2 respectively, spiral electric heating wire 4 is arranged in the circular annular channel of furnace pipe body 3 and sequentially passes through partition plate 8, and incoming line 1 and outgoing line 2 are arranged in the same wire hole 6.

[0021] As shown in the drawings, Figure 3 The structure and shape of spiral electric heating wire 4 directly affect the service life of the heater, and through experiments, the effect is best by adopting nickel-chromium alloy heating wire with nickel 80 and chromium 20, winding into a spiral heating coil with a diameter of 3.0 mm, a pitch of 0.8 mm and 1500 turns.

[0022] As shown in the drawings, Figure 1 And Figure 3 As shown in the drawings, the structure and material of furnace pipe body 3 are as follows: it needs to have high temperature resistance, good insulation, high mechanical strength and fast heat conduction. The tubular electric furnace frame with an outer diameter of 25 mm and an inner diameter of 14 mm is made of high-aluminum ceramic, and the thinnest part of the ceramic pipe is 1 mm. That is, the insulation, heat conduction and mechanical strength are guaranteed, and the heat can also be conducted quickly.

[0023] The working principle and installation method of the utility model are as follows: threading, circulating and oppositely threading incoming line 1 and spiral electric heating wire 4 into the wire hole 6 of high-aluminum ceramic furnace pipe body 3, and making spiral electric heating wire 4 circulate and oppositely thread into the snakelike channel formed by the partition plate 8 arranged in the furnace pipe body 3, and the other end of outgoing line 2 threads out, and incoming line 1 and outgoing line 2 are in the same wire hole, and there are wire holes 6 uniformly distributed at the opposite positions on upper mounting surface 5 and lower mounting surface 7, so that when the heater is turned on and off, the heating collar will generate induced electromotive force in opposite directions and equal groups, and they will offset each other in the disturbed line, so as to achieve the effect of eliminating induced electromotive force.

[0024] The structure design of the heater makes its service life longer, the furnace pipe body serves as a coil support frame structure and material, and the insulation, heat conduction and mechanical strength performance are considered, spiral electric heating wire circulates and oppositely threads into the channel separated by the partition plate in the furnace pipe body, the induced electromotive force generated by the heating coil is offset by using the induced electromotive force generated by the same group in opposite directions, so that the heater can be used normally, other components are not disturbed, and the measurement accuracy is improved.

Claims

1. A zirconia probe heater comprising a furnace tube body (3), characterised in that: The furnace tube body (3) is a tubular electric furnace frame, and the wire passing holes (6) are uniformly distributed on the upper mounting surface (5) and the lower mounting surface (7) of the furnace tube body (3) at opposite positions, a circular annular channel is longitudinally arranged in the furnace tube body (3), the circular annular channel is provided with upper and lower staggered partition plates (8), the adjacent partition plates (8) are connected with the upper mounting surface (5) and the lower mounting surface (7) respectively, the spiral electric heating wire (4) is connected with the incoming wire (1) and the outgoing wire (2) at two ends respectively, the spiral electric heating wire (4) is arranged in the circular annular channel of the furnace tube body (3), and the spiral electric heating wire (4) sequentially passes through the partition plates (8).

2. A zirconia probe heater according to claim 1, wherein The incoming wire (1) and the outgoing wire (2) are arranged in the same wire passing hole (6).

3. A zirconia probe heater as defined in claim 1, wherein The spiral electric heating wire (4) adopts a nickel-chromium alloy heating wire with a diameter of 0.4 mm.

4. A zirconia probe heater according to claim 1 or 3, characterised in that The spiral electric heating wire (4) is wound into a spiral heating coil with a diameter of 3.0 mm and a turn spacing of 0.8 mm.

5. A zirconia probe heater as defined in claim 1, wherein The furnace tube body (3) is made of high-aluminum ceramic to form a tubular electric furnace frame with an outer diameter of 25 mm and an inner diameter of 14 mm.

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