CN111847844B

CN111847844B - Platinum channel for reducing temperature difference of glass melt

Info

Publication number: CN111847844B
Application number: CN202010818849.5A
Authority: CN
Inventors: 彭寿; 张冲; 岳凯; 张晓春; 高多军
Original assignee: Bengbu Zhongguangdian Technology Co Ltd
Current assignee: Bengbu Zhongguangdian Technology Co Ltd
Priority date: 2020-08-14
Filing date: 2020-08-14
Publication date: 2022-05-24
Anticipated expiration: 2040-08-14
Also published as: CN111847844A

Abstract

The invention provides a platinum channel for reducing glass liquid temperature difference, which comprises a platinum channel body (1), wherein flanges (2) are sleeved at two ends of the platinum channel body (1), and power lines (3) are communicated on the flanges (2), and the platinum channel is characterized in that: a heating shaft (4) which is coaxially distributed is arranged in the platinum channel body (1), and a group of supporting bodies (5) which are coaxially distributed are arranged between the heating shaft (4) and the platinum channel body (1). The invention effectively ensures the consistency of the temperature of the glass liquid in the platinum channel body, increases the strength of the platinum channel body and prevents the problem of creep collapse of the platinum channel at high temperature.

Description

Platinum channel for reducing temperature difference of glass melt

The technical field is as follows:

the invention relates to the production field of electronic display glass, in particular to a platinum channel for reducing the temperature difference of glass liquid.

Background art:

in the manufacturing process of the TFT-LCD, LTPS and other electronic display glass substrates, after the batch materials are melted at high temperature in a kiln, the batch materials enter a high-temperature-resistant and corrosion-resistant platinum channel to finish the process treatments of clarification, homogenization and the like, and glass liquid with few defects is formed for forming and drawing the glass substrates.

The glass liquid temperature of each functional segment of the platinum channel has a key influence on the physicochemical properties of the glass substrate. If the glass liquid temperature is not uniform, the optical characteristics of the glass substrate, such as striae, refractive index, or transmittance, are affected. For electronic display glass substrates, the stripes are one of serious defects, and especially the requirement on the stripes on a high-quality liquid crystal display is very high, which can seriously affect the use quality of products.

In production, the most common method is to directly guide and heat the platinum channel with the circular structure, the flange structure is utilized to directly guide current to the platinum channel body, and the current flows through the platinum channel with certain internal resistance to generate heat so as to heat glass liquid. As the glass liquid flows in the platinum channel, the glass liquid is heated from outside to inside, the temperature difference between the central temperature of the glass liquid and the temperature of the contact part of the platinum body on the same section is 10-20 ℃, and the temperature difference is larger on a part of functional sections. Under such production conditions, the glass substrate has a high streak and optical defect rate, which is troubled by many glass substrate manufacturers.

As advanced glass substrates become mainstream, a general method is to thicken a platinum channel and heat more molten glass in a unit time, thereby satisfying production requirements. However, the thicker the platinum channel, the greater the temperature difference, and the higher the striations and optical defectivity.

Although some glass substrate manufacturers adopt platinum channels of oval, rectangular and other structures to heat to solve the problem of temperature difference, because platinum is influenced by gravity under high temperature and can creep and subside, structurally there is not circular stable, and the life of platinum channel is influenced because of creep collapse more easily.

The invention content is as follows:

the invention aims to overcome the defects in the prior art and provides a platinum channel for reducing the temperature difference of molten glass.

The application provides the following technical scheme:

the utility model provides a reduce platinum passageway of glass liquid difference in temperature, it includes platinum passageway body, overlaps at platinum passageway body both ends and is equipped with the flange, and it has power cord, its characterized in that all to communicate on the flange: heating shafts which are coaxially distributed are arranged in the platinum channel body, and a group of supporting bodies which are coaxially distributed are arranged between the heating shafts and the platinum channel body.

On the basis of the technical scheme, the following further technical scheme can be provided:

the supporter includes that the equipartition has a set of bracing piece between the outer wall of heating shaft and platinum passageway body inner wall, is equipped with the strengthening rib on the platinum passageway body inner wall between two adjacent bracing pieces, the both ends of strengthening rib respectively with the bracing piece end connection that corresponds.

At least one reinforcing ring which is coaxially distributed with the heating shaft is arranged on the supporting body.

The support rods of the adjacent support bodies are arranged in a staggered way

The flange is made of copper, nickel and other materials with good conductivity and high temperature resistance.

The supporting body, the reinforcing ring and the heating shaft are all made of platinum materials the same as the platinum channel body.

The invention has the advantages that:

the invention effectively ensures the consistency of the temperature of the glass liquid in the platinum channel body, increases the strength of the platinum channel body and prevents the problem of creep collapse of the platinum channel at high temperature. Particularly, because the angles of the supporting rods in the adjacent supporting bodies are arranged in a staggered mode, the glass liquid can form turbulent flow when passing through the platinum channel, and the clarification and homogenization capacity of the platinum channel on the glass liquid is improved.

Description of the drawings:

FIG. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic structural view of a single support.

The specific implementation mode is as follows:

as shown in figures 1 and 2, a platinum passageway for reducing glass liquid temperature difference comprises a platinum passageway body 1, wherein flanges 2 are sleeved on the end parts of two ends of the platinum passageway body 1, the flanges 2 are made of materials with good conductivity such as copper, nickel and the like and high temperature resistance, the flanges 2 are communicated with cables 3, and the cables 3 are communicated with a mains supply or a matched UPS (uninterrupted power supply) so as to electrify the platinum passageway body 1.

A heating shaft 4 which is coaxially distributed is arranged in the platinum channel body 1, and a group of supporting bodies 5 which are coaxially distributed are arranged between the heating shaft 4 and the platinum channel body 1. The heating shaft 4 is a hollow platinum round tube, and two ends of the heating shaft are provided with sealing structures.

The supporter 5 include that the equipartition has a set of bracing piece 5a that forms radial distribution between the outer wall of heating shaft 4 and 1 inner wall of platinum passageway body, be equipped with strengthening rib 5b on the 1 inner wall of platinum passageway body between two adjacent bracing pieces 5a, strengthening rib 5b welds on 1 inner wall of platinum passageway body, and its both ends weld together with corresponding bracing piece 5a tip respectively. In addition, the bracing pieces of two adjacent supporters are arranged in a staggered manner.

Each support body 5 is also welded with a reinforcing ring 6 arranged coaxially to the heating shaft 4. The supporting body 5, the reinforcing ring 6 and the heating shaft 4 are all made of the same platinum material as the platinum channel body 1.

The working principle is as follows:

the cable connected to the power source 2b is fixed to the cable hole 2c of the different flange 2 using the bolt 2 a.

After the circular telegram, under the conduction of bracing piece, partly electric current passes through the platinum body, and another part passes through the heating shaft, and the platinum body that makes generates heat with the heating shaft simultaneously, and the glass liquid that can more even convection current flow through the platinum passageway heats to reduce the difference in temperature of glass liquid central temperature and platinum body contact site on same cross-section.

In the process that the glass liquid passes through the platinum channel, because the angles of the supporting rods in the adjacent supporting bodies are arranged in a staggered mode, the glass liquid forms turbulent flow, the glass liquid with certain temperature and component difference is continuously mixed, and therefore the uniformity of the heating temperature of the glass liquid and the uniformity of the glass liquid on the components are improved.

Due to the turbulent flow, in the process of continuously mixing the glass liquid, small bubbles existing in the glass liquid can be continuously fused and changed into large bubbles, and then the glass floats upwards to be discharged under the action of buoyancy, so that the clarification of the glass is facilitated.

The more the support bodies are distributed, the more the number of the support rods is, the larger the angle difference is, the more obvious the turbulent flow formed by the glass liquid is, and the existence of the reinforcing ring can also strengthen the turbulent flow and also can strengthen the integral strength of the support bodies.

In addition, the support rod, the reinforcing ribs and the reinforcing ring provide effective support for the platinum body, and the risk of creep collapse of the platinum channel at high temperature is reduced.

Claims

1. The utility model provides a reduce platinum passageway of glass liquid difference in temperature, it includes platinum passageway body (1), overlaps at platinum passageway body (1) both ends and is equipped with flange (2), all communicates power cord (3), its characterized in that on flange (2): a heating shaft (4) which is coaxially distributed is arranged in the platinum channel body (1), and a group of supporting bodies (5) which are coaxially distributed are arranged between the heating shaft (4) and the platinum channel body (1); the support body (5) comprises a group of support rods (5 a) which are uniformly distributed between the outer wall of the heating shaft (4) and the inner wall of the platinum channel body (1), reinforcing ribs (5 b) are arranged on the inner wall of the platinum channel body (1) between two adjacent support rods (5 a), and two ends of each reinforcing rib (5 b) are respectively connected with the end parts of the corresponding support rods (5 a); the supporting body (5) is also provided with at least one reinforcing ring (6) which is coaxially distributed with the heating shaft (4); the supporting rods (5 a) of the adjacent supporting bodies (5) are arranged in a staggered mode.

2. A platinum channel for reducing the temperature differential between molten glass as defined in claim 1 wherein: the flange (2) is made of copper or nickel materials with good conductivity and high temperature resistance.

3. A platinum channel for reducing the temperature differential between molten glass as defined in claim 1 wherein: the supporting body (5), the reinforcing ring (6) and the heating shaft (4) are all made of the same platinum material as the platinum channel body (1).