Molybdenum electrode bottom insertion type kiln structure

Abstract

The utility model relates to a molybdenum electrode bottom inserting type kiln structure which comprises a kiln body and a molybdenum electrode assembling unit, the molybdenum electrode assembling unit comprises a rod-shaped molybdenum electrode, and one end of the molybdenum electrode is an inner end used for heating molten glass in a kiln; the inner end of the rod-shaped molybdenum electrode is connected with a molybdenum plate for heating molten glass in the kiln; the thickness of the molybdenum plate is smaller than the radius of the rod-shaped molybdenum electrode; and the molybdenum plate and the axis of the rod-shaped molybdenum electrode are coplanar and are symmetrically arranged about the axis. The rod-shaped molybdenum electrode is connected to the bottom wall of the kiln body in a penetrating mode, the inner end of the rod-shaped molybdenum electrode and the molybdenum plate are both located in the kiln body, and the plate face of the molybdenum plate is parallel to the flowing direction of molten glass in the kiln body. The molybdenum electrode disclosed by the utility model is large in conductive area, low in current density and low in use consumption; and under the condition of the same heating effect, fewer materials are used. When the molybdenum electrode is applied to a kiln with a bottom insertion structure, the molybdenum electrode is firm and reliable and is not easy to break, the overall use stability of the electrode can be kept, and high-quality glass products can be produced.

Description

Technical Field

[0001] The utility model belongs to the technical field of glass manufacturing and forming in chemistry and metallurgy, and specifically relates to a molybdenum electrode bottom-inserted kiln structure. Background Art

[0002] In the glass manufacturing industry, the molybdenum electrode heating method can be used to melt most glasses, including refractory glass, glass with high viscosity, glass with high volatile components, etc., except lead glass. Molybdenum is stable to glass components. Therefore, molybdenum electrodes are widely used to improve the heating design of glass kilns to improve glass quality. Molybdenum electrodes are used in the design of glass kiln heating structures. At present, rod-shaped molybdenum electrodes are mostly inserted vertically and connected to the side wall of the glass kiln. See the electric melting glass kilns disclosed in CN210892992U and CN203319857U.

[0003] However, after the molybdenum electrode is side-plugged and connected to the side wall of the glass furnace for a long time, the molybdenum electrode will sink due to its own weight and be eroded by the continuous flushing of the glass liquid, and may deform or break; if the molybdenum electrode breaks and sinks to the bottom of the furnace, it may also block the bubbling port of the bubbler.

[0004] On the other hand, the uneven release of electric energy by rod-shaped molybdenum electrodes will produce strong convection on the glass liquid, affecting the clarification effect and resulting in poor quality of glass products. At the same time, the current density is large, and the electrode material will melt, volatilize and oxidize due to the excessive current density, which will not only affect the heating quality, but the melted electrode will also contaminate the glass liquid.

[0005] In view of this, further improving the design of the molybdenum electrode structure and operating conditions is an urgent problem to be solved in this application. Summary of the invention

[0006] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the utility model is to provide a molybdenum electrode bottom-inserted kiln structure, so as to avoid the problems of unstable molybdenum electrode side-inserted connection and poor electrode electric power effect, and to achieve better and more stable kiln heating effect.

[0007] A molybdenum electrode bottom-inserted kiln structure comprises a kiln body and a molybdenum electrode assembly unit, wherein the molybdenum electrode assembly unit comprises a rod-shaped molybdenum electrode and a molybdenum plate, wherein the rod-shaped molybdenum electrode is penetrated and connected to the bottom wall of the kiln body, wherein the inner end of the rod-shaped molybdenum electrode is connected to the molybdenum plate and both are located in the kiln body, and the plate surface of the molybdenum plate is parallel to the flow direction of the glass liquid in the kiln body.

[0008] To further improve the above technical solution, the thickness of the molybdenum plate is smaller than the radius of the rod-shaped molybdenum electrode.

[0009] Further, the molybdenum plate is parallel to the axis of the rod-shaped molybdenum electrode.

[0010] Furthermore, the molybdenum plate is coplanar with the axis of the rod-shaped molybdenum electrode.

[0011] Furthermore, the molybdenum plates are arranged symmetrically about the axis of the rod-shaped molybdenum electrode.

[0012] Furthermore, a mounting groove is recessed on the end surface of the inner end of the rod-shaped molybdenum electrode, and one side edge of the molybdenum plate falls into the mounting groove. A bolt passes through the inner end of the rod-shaped molybdenum electrode, the mounting groove and the molybdenum plate part in the mounting groove for connection.

[0013] Furthermore, in the installation groove, the edge of the molybdenum plate and the bottom wall of the installation groove are arranged in a surface-to-surface contact manner.

[0014] Furthermore, the molybdenum plate is square; and the bottom wall of the mounting groove is perpendicular to the axis of the rod-shaped molybdenum electrode.

[0015] Furthermore, the arc-shaped edge on the inner end surface of the rod-shaped molybdenum electrode is chamfered, and the surface formed by the chamfer is parallel to the edge of the installation notch portion and the flow direction of the glass liquid in the furnace body.

[0016] Furthermore, a cooling unit is sleeved on the outer end of the rod-shaped molybdenum electrode outside the bottom wall, and an auxiliary conductor for implementing electrical connection is extended and connected to the end surface of the outer end.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] 1. The molybdenum electrode bottom-inserted kiln structure of the utility model applies the molybdenum electrode assembly unit with molybdenum plates to the bottom-inserted structure, which has a good force advantage. There are rod-shaped molybdenum electrodes under the molybdenum plates to provide support from bottom to top. The molybdenum plates will not be cantilevered like side-inserted ones, and have a tendency to sink due to their own weight. The electrode structure is firm and reliable, and is not prone to breakage, which can maintain the overall stability of the molybdenum electrode assembly unit.

[0019] 2. In the molybdenum electrode bottom-inserted kiln structure of the utility model, the inner end of the rod-shaped molybdenum electrode is connected to the molybdenum plate to form a plate-shaped molybdenum electrode in the kiln. The area of ​​the molybdenum plate is larger, and the conductive area is more than four times that of the rod electrode of the same weight, and the current density is smaller, which can avoid the electrode material from melting, volatilizing and oxidizing due to excessive current density, and the consumption is less. On the contrary, under the same heating effect, the combined structure of the rod-shaped molybdenum electrode + the plate-shaped molybdenum electrode uses less material and is lighter than the single rod-shaped molybdenum electrode structure, which can reduce the problem of high-temperature creep of the electrode. When in use, the main composition of the electric lines of the plate-shaped molybdenum electrode is a parallel electric field, and the electric energy release between the two molybdenum plates is more uniform, which will not produce strong convection on the glass liquid, can achieve a better clarification effect, and produce high-quality glass products. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1It is a schematic diagram of a molybdenum electrode bottom plug-in kiln structure of a specific embodiment;

[0021] Figure 2 for Figure 1 Side view of the molybdenum electrode assembly unit alone;

[0022] Figure 3 for Figure 1 A top view of a separate molybdenum electrode assembly unit;

[0023] Among them, there are a rod-shaped molybdenum electrode 1, a mounting groove 11, a chamfer 12, a molybdenum plate 2, a bolt 3, a nut 31, a bottom wall 5, a cooling unit 6, a cooling water inlet 61, a cooling water outlet 62, and an auxiliary conductor 7. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiments of the present utility model clearer, the technical solution in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model.

[0025] See also Figure 2 , Figure 3 The molybdenum electrode assembly unit used in the specific embodiment "molybdenum electrode bottom plug-in kiln structure" is first introduced as follows.

[0026] The molybdenum electrode assembly unit includes a rod-shaped molybdenum electrode 1, the inner end of the rod-shaped molybdenum electrode 1 is used for heating the glass liquid in the kiln, and the outer end of the rod-shaped molybdenum electrode 1 is used for passing through the wall of the kiln and connecting to external electrical components; a molybdenum plate 2 for heating the glass liquid in the kiln is connected to the inner end of the rod-shaped molybdenum electrode 1 to form a combined structure of the rod-shaped molybdenum electrode 1 + the plate-shaped molybdenum electrode.

[0027] The molybdenum electrode assembly unit connects the molybdenum plate 2 to the inner end of the rod-shaped molybdenum electrode 1 to form a plate-shaped molybdenum electrode in the kiln. The area of ​​the molybdenum plate 2 is larger, and the conductive area is more than four times that of the rod electrode of the same weight, and the current density is smaller, which can avoid the melting, volatilization and oxidation of the electrode material due to excessive current density, and the consumption is less. On the contrary, under the same heating effect, the combined structure of the rod-shaped molybdenum electrode and the plate-shaped molybdenum electrode uses less material and is lighter than the single rod-shaped molybdenum electrode structure, which can reduce the problem of high-temperature creep of the electrode. When in use, the main composition of the electric lines of the plate-shaped molybdenum electrode is a parallel electric field, and the electric energy between the two molybdenum plates 2 is released more evenly, which will not produce strong convection on the glass liquid, can achieve a better clarification effect, and produce high-quality glass products.

[0028] During implementation, the molybdenum plate 2 can be welded and fixedly connected to the inner end of the rod-shaped molybdenum electrode 1, or it can be disassembled and connected by maintaining a conductive connection; the relative position relationship is preferably conducive to heating the glass liquid in the furnace under actual working conditions.

[0029] To ensure less material and lower mass under the same thermal effect, the thickness of the molybdenum plate 2 should be smaller than the radius of the rod-shaped molybdenum electrode 1. In this embodiment, the thickness of the molybdenum plate 2 is 15 mm, and the radius of the rod-shaped molybdenum electrode 1 is 40 mm.

[0030] The molybdenum plate 2 is parallel to the axis of the rod-shaped molybdenum electrode 1. In this way, regardless of side insertion or bottom insertion, it is convenient to control the posture of the molybdenum plate 2 in the kiln, and it is convenient to control the parallel relationship between the molybdenum plates 2 in multiple units and the relationship with the flow direction of the glass liquid.

[0031] The molybdenum plate 2 is coplanar with the axis of the rod-shaped molybdenum electrode 1. Since the molybdenum plate 2 has a certain thickness, here specifically refers to the central plane of the molybdenum plate 2 in the thickness direction being coplanar with the axis of the rod-shaped molybdenum electrode 1. In this way, the center connection is conducive to ensuring the strength of the connection.

[0032] The molybdenum plate 2 is symmetrically arranged with respect to the axis of the rod-shaped molybdenum electrode 1, so that the force balance is better and the damage rate of the connection during use is reduced.

[0033] Please continue to see Figure 2 , Figure 3 In the assembly connection form of the molybdenum electrode assembly unit of this embodiment, a mounting groove 11 is recessed on the end surface of the inner end of the rod-shaped molybdenum electrode 1, and one side edge of the molybdenum plate 2 falls into the mounting groove 11. A bolt 3 is movably passed through the inner end of the rod-shaped molybdenum electrode 1, the mounting groove 11, and the molybdenum plate part in the mounting groove and connected with a nut 31 to implement bolting. The bolt 3 and the nut 31 are both made of molybdenum.

[0034] In this way, the molybdenum plate 2 is detachably connected to the inner end of the rod-shaped molybdenum electrode 1 by bolting, and the connection is stable, easy to assemble and manufacture, and can be replaced and maintained, reducing the cost of use. During implementation, the bolt 3 can be movably passed through the molybdenum rod and the molybdenum plate 2 and connected to the nut 31, or the hole on the molybdenum rod on one side of the mounting groove 11 can be an internal threaded hole, and the bolt 3 can be movably passed through the molybdenum rod on the other side of the mounting groove 11, the mounting groove 11, and the molybdenum plate part in the mounting groove 11, and then directly threadedly connected to the internal threaded hole and tightened. During manufacturing, the width of the mounting groove 11 is adapted to the molybdenum plate 2 or slightly larger than the thickness of the molybdenum plate 2.

[0035] In the installation groove 11, the edge of the molybdenum plate 2 and the bottom wall of the installation groove 11 are in surface-to-surface contact. In this way, the molybdenum plate 2 is not only clamped by the opening of the installation groove 11 and the bolt connection, but before clamping, the molybdenum plate 2 and the bottom wall of the installation groove 11 of the molybdenum rod are first pressed tightly, and then bolted and clamped, so as to further improve the force transmission and balance between the molybdenum plate 2 and the molybdenum rod.

[0036] The size of the molybdenum plate 2 can be determined according to the capacity of the kiln, the melting area and other data. In this embodiment, the molybdenum plate 2 is square, 600 mm long, 500 mm wide, and the long side is perpendicular to the axis of the rod-shaped molybdenum electrode 1. Since the plate surface is parallel and symmetrical to the axis, the bottom wall of the mounting groove 11 is also perpendicular to the axis of the rod-shaped molybdenum electrode 1, meeting the structural design and construction requirements.

[0037] The remaining arc-shaped edge after the installation groove 11 is formed on the inner end surface of the rod-shaped molybdenum electrode 1 is chamfered, and the surface formed by the chamfer 12 is parallel to the edge of the mouth of the installation groove 11 and coplanar with the edge of the corresponding side. In this way, the erosion of the sharp parts by the glass liquid can be reduced, the service life can be improved, and it is also convenient to cover the electrode surface treatment. A layer of MoZrO can be selected on the surface of the electrode. 2 , additive processing is carried out to improve the electrode's oxidation resistance and corrosion resistance at the same time.

[0038] Considering that the molybdenum electrode assembly unit is inserted sideways in the glass furnace, the molybdenum plate 2 sinks due to its own weight and is prone to deformation or breakage, the molybdenum electrode assembly unit is applied to the molybdenum electrode bottom-inserted furnace structure of this embodiment.

[0039] See also Figure 1 The molybdenum electrode bottom-inserted kiln structure of this embodiment includes a kiln body and the above-mentioned molybdenum electrode assembly unit. The rod-shaped molybdenum electrode 1 is vertically penetrated and connected to the bottom wall 5 of the kiln body. The inner end of the rod-shaped molybdenum electrode 1 and the molybdenum plate 2 are located in the kiln body.

[0040] The furnace body has a glass liquid inlet and a glass liquid outlet (not shown in the figure, the furnace body is an existing one, Figure 1 Only the bottom wall is indicated in the figure), the positions of the glass liquid inlet and the glass liquid outlet on the kiln body determine the flow direction of the glass liquid in the kiln body, the plate surface of the molybdenum plate 2 is parallel to the flow direction, that is, the side of the molybdenum plate with a smaller area is opposite to the bottom wall of the kiln, and the axis of the rod-shaped molybdenum electrode 1 is perpendicular to the flow direction.

[0041] In this way, in the bottom-inserted structure, the rod-shaped molybdenum electrode 1 under the molybdenum plate 2 provides support from bottom to top, and the molybdenum plate 2 will not be cantilevered like in the side-inserted structure and have a tendency to sink due to its own weight. The overall stability of the molybdenum electrode assembly unit can be maintained, and the electrode structure is firm and reliable, and is not prone to breakage.

[0042] When in use, the molybdenum plate 2 is parallel to the flow direction of the glass liquid, and will not hinder the flow of the glass liquid, or hinder the fluidity of the glass liquid very little; the glass liquid sinks into the gap between the holes of the molybdenum rod passing through the bottom wall 5 due to gravity, forming a fixed layer that fills the gap between the molybdenum rod and the refractory bricks of the bottom wall 5, which can fully protect the electrode and prevent the electrode from being easily oxidized.

[0043] During implementation, it is preferred that the lower edge of the molybdenum plate 2 is about fifty millimeters away from the inner side of the bottom wall 5 of the kiln body to reduce the erosion of the electrode on the bottom bricks of the kiln body.

[0044] Among them, the rod-shaped molybdenum electrode 1 is sleeved with a cooling unit 6 on the outer end outside the bottom wall 5, and the end surface of the outer end is extended and connected with an auxiliary conductor 7 for implementing electrical connection. The auxiliary conductor 7 can be an alloy rod, which has high mechanical strength, is not easily deformed or damaged by external factors, and will not oxidize even if exposed to air for a long time. The alloy rod is socket-connected or welded to the outer end of the rod-shaped molybdenum electrode 1, and the copper plate for supplying electricity to the electrode is connected to the alloy rod. The cooling unit 6 is usually a cooling water jacket with a cooling water inlet 61 and a cooling water outlet 62, which prevents the outer end of the rod-shaped molybdenum electrode 1 from oxidizing. It is an existing means and will not be repeated here.

[0045] The bottom wall 5 of the kiln body is made of refractory material, and the 41# AZS brick is generally in direct contact with the glass liquid. For example, in the molybdenum electrode bottom plug-in kiln structure provided by the utility model, when there are multiple molybdenum electrode assembly units, the arrangement of the molybdenum plates 2 is evenly arranged according to the actual situation in the kiln body, generally in the form of an array with evenly spaced vertical and horizontal intervals, and adjacent molybdenum plates are parallel and facing each other horizontally. The current on the molybdenum plates 2 is uniform, and the heating is also very uniform. The glass liquid is well heated by the electrode to eliminate bubbles, and the bubble-free glass liquid is sent to the subsequent platinum channel through the flow liquid to produce high-quality glass products.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A molybdenum electrode bottom insertion kiln structure, comprising a kiln body, characterized in that: It also includes a molybdenum electrode assembly unit, which includes a rod-shaped molybdenum electrode and a molybdenum plate. The rod-shaped molybdenum electrode is penetrated and connected to the bottom wall of the kiln body, and the inner end of the rod-shaped molybdenum electrode is connected to the molybdenum plate and both are located in the kiln body. The plate surface of the molybdenum plate is parallel to the flow direction of the glass liquid in the kiln body.

2. The molybdenum electrode bottom plug-in kiln structure according to claim 1, characterized in that: The thickness of the molybdenum plate is smaller than the radius of the rod-shaped molybdenum electrode.

3. The molybdenum electrode bottom plug-in kiln structure according to claim 2, characterized in that: The molybdenum plate is parallel to the axis of the rod-shaped molybdenum electrode.

4. The molybdenum electrode bottom plug-in kiln structure according to claim 3, characterized in that: The molybdenum plate is coplanar with the axis of the rod-shaped molybdenum electrode.

5. The molybdenum electrode bottom plug-in kiln structure according to claim 2, characterized in that: The molybdenum plates are arranged symmetrically with respect to the axis of the rod-shaped molybdenum electrode.

6. A molybdenum electrode bottom plug-in kiln structure according to any one of claims 1 to 5, characterized in that: A mounting groove is recessed on the end surface of the inner end of the rod-shaped molybdenum electrode, and one side edge of the molybdenum plate falls into the mounting groove. A bolt passes through the inner end of the rod-shaped molybdenum electrode, the mounting groove and the molybdenum plate part in the mounting groove for connection.

7. The molybdenum electrode bottom insertion kiln structure according to claim 6, characterized in that: In the installation groove, the edge of the molybdenum plate and the bottom wall of the installation groove are arranged in a surface-to-surface contact manner.

8. The molybdenum electrode bottom insertion kiln structure according to claim 7, characterized in that: The molybdenum plate is square; the bottom wall of the mounting groove is perpendicular to the axis of the rod-shaped molybdenum electrode.

9. The molybdenum electrode bottom insertion kiln structure according to claim 6, characterized in that: The arc-shaped edge on the inner end surface of the rod-shaped molybdenum electrode is chamfered, and the surface formed by the chamfer is parallel to the edge of the installation groove portion and the flow direction of the glass liquid in the kiln body.

10. The molybdenum electrode bottom plug-in kiln structure according to claim 1, characterized in that: A cooling unit is sleeved on the outer end of the rod-shaped molybdenum electrode outside the bottom wall, and an auxiliary conductor for implementing electrical connection is extended and connected to the end surface of the outer end.

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