CN216998145U

CN216998145U - Integrated heating device for platinum channel

Info

Publication number: CN216998145U
Application number: CN202123210013.6U
Authority: CN
Inventors: 王答成; 王梦龙; 杨威; 王苍龙
Original assignee: Irico Display Devices Co Ltd
Current assignee: Irico Display Devices Co Ltd
Priority date: 2021-12-20
Filing date: 2021-12-20
Publication date: 2022-07-19
Anticipated expiration: 2031-12-20

Abstract

The utility model discloses an integrated heating device for a platinum channel, and belongs to the technical field of substrate glass manufacturing. An integrated heating device for a platinum channel comprises an inner filling layer, wherein the inner filling layer is arranged on the periphery of a platinum pipe, a plurality of support frames are radially arranged on the outer wall of the inner filling layer, each support frame is provided with a plurality of U-shaped grooves along the axial direction, heating wires are wound in the U-shaped grooves, and the heating wires are wound from one end to the other end of the platinum pipe; an external supporting brick is sleeved on the platinum pipe on which the heating wire is wound, and an external grouting layer is filled in a gap between the external supporting brick and the platinum pipe on which the heating wire is wound. The utility model can prolong the service life of the platinum channel heating wire.

Description

Integrated heating device for platinum channel

Technical Field

The utility model belongs to the technical field of substrate glass manufacturing, and particularly relates to an integrated heating device for a platinum channel.

Background

The heating mode of the platinum channel is mainly divided into two modes, one mode is that a current loop is formed between electrodes welded on a channel body, and then joule heat is generated on the platinum body to form a direct heating mode for the internal glass melt; the other is an auxiliary heater installed outside the platinum body, a platinum wire is wound inside the auxiliary heater, joule heat is also generated by electrifying the platinum wire, but the heat generated by the auxiliary heater needs to be conducted to the platinum body through an intermediate filling layer, so the heating method is generally called indirect heating. The indirect heating is generally arranged in the rear half area of the channel, mainly because the indirect heating action is slow, but the heat source is uniform, and the indirect heating is suitable for temperature control of the rear half area with the purpose of cooling and radiating, namely, the indirect heating has the capability of bidirectional temperature regulation. Because the internal structure matched with the indirect heating can be designed according to the shape of the platinum body, the heating wire and the platinum body form basically consistent equal-spacing conditions, and the heating effect on various special-shaped platinum structures is better and more uniform. However, the pure platinum wire which generates joule heat in the auxiliary heater is easy to generate oxidation and volatilization reactions, so that the reduction of the wire diameter of the heating wire is often caused, and the melting can be generated after the reduction reaches a certain degree, so that the improvement of the anti-oxidation volatilization capability of the platinum heating wire is a key way for improving the problem. Through the analysis to many line bodies, it has certain law to find volatilizing on platinum heater strip surface, and it is comparatively serious to be located one side of inslot promptly to volatilize, has formed more platinum crystallization particulate matter, and outside one side is better relatively. The heater structure is mainly related to the sealing degree of the platinum wire placed in the heater brick groove, and a continuous wire groove structure is distributed on the surface of the heater structure and mainly used for insulating and sealing the platinum wire, but the wire groove structure is narrow in space and has a certain depth, so that the platinum wire cannot be completely wrapped and sealed in the sealing and filling process.

SUMMERY OF THE UTILITY MODEL

The object of the present invention is to overcome the above-mentioned drawbacks of the prior art and to provide an integrated heating device for platinum channels.

In order to achieve the purpose, the utility model adopts the following technical scheme to realize the purpose:

an integrated heating device for a platinum channel comprises an inner filling layer, wherein the inner filling layer is arranged on the periphery of a platinum pipe, a plurality of support frames are radially arranged on the outer wall of the inner filling layer, each support frame is provided with a plurality of U-shaped grooves along the axial direction, heating wires are wound in the U-shaped grooves, and the heating wires are wound from one end of the platinum pipe to the other end of the platinum pipe;

an external supporting brick is sleeved on the platinum pipe for winding the upper heating wire, and an external grouting layer is filled in a gap between the external supporting brick and the platinum pipe for winding the upper heating wire.

Further, the thickness of the inner filling layer is 15 mm.

Further, the distance between adjacent U type grooves is 8 ~ 15 mm.

Further, the slurry of the outer grouting layer is formed by mixing alumina filler, industrial sodium silicate and water according to the ratio of 1:1.5: 1.5.

Furthermore, the diameter of the heating wire is 2.5-4.0 mm.

Further, the heating wire is a platinum heating wire.

Further, the slurry of the inner filling layer is formed by mixing alumina and industrial sodium silicate in a mass ratio of 1:1.

Furthermore, the supporting frames are uniformly distributed on the outer wall of the inner filling layer in the radial direction.

Furthermore, the U-shaped grooves are uniformly distributed on the support frame along the axial direction.

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

the integrated heating device for the platinum channel can prolong the service life of the heating wire of the platinum channel, the heating wire can realize free sealing and filling of a space, grouting filling is utilized, the original heater brick is replaced by solidification of filling slurry, omnibearing sealing and protection are formed on the platinum heating wire, and the high-temperature volatilization rate of the platinum wire is slowed down. According to the utility model, the whole heating wire is not contacted with the refractory material of the inner filling layer through the support frame, so that a good operation space is provided for the omnibearing sealing of the heating wire; the design of heater strip and support frame is based on the principle in heater strip silk groove, and the heater strip is located U type groove, and area of contact between them is little, can realize the equidistant distribution and the good insulation of heater strip simultaneously again.

Drawings

FIG. 1 is a schematic structural view of sealing of a heating wire;

FIG. 2 is a schematic view showing the distribution of heating wires and supporting frames;

fig. 3 is a schematic structural view of the support frame.

Wherein: 1-platinum tube; 2-inner filling layer; 3-a support frame; 4-heating the wire; 5-outer grouting layer; 6-external support brick.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the utility model described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The utility model can reduce the length of the wire groove and simultaneously seal and insulate the heating wire, and the overall sealing performance of the heating wire is greatly improved by combining a targeted local supporting structure and a systematic grouting filling method, thereby improving the anti-oxidation volatilization performance of the heating wire and finally prolonging the service life of the heating wire.

The utility model is described in further detail below with reference to the accompanying drawings:

the utility model provides an integral type heating device for platinum passageway, through the brand-new heater strip mounting means of design, adopts support frame 3 that a certain amount of law distributes to be fixed in heater strip 4 on the certain height apart from inner filling layer 2 wholly, makes it possess certain grout space, again through carrying out whole grout to this space, with heater strip 4 overall seal, forms to 1 inside fine and close heating structure of platinum pipe.

Referring to fig. 1 and 2, fig. 1 is a sectional view of the utility model, fig. 2 is an internal structure view of the utility model, an inner filling layer 2 is arranged on the periphery of a platinum tube 1, support frames 3 are uniformly distributed on the outer wall of the inner filling layer 2 in the radial direction, U-shaped grooves are uniformly distributed on the support frames 3 along the axial direction, and heating wires 4 are arranged in the U-shaped grooves and wound from one end to the other end of the platinum tube 1; an external supporting brick 6 is sleeved on the platinum pipe 1 wound with the upper heating wire 4, and an external grouting layer 5 is filled in a gap between the external supporting brick 6 and the platinum pipe 1 wound with the upper heating wire 4.

The platinum tube 1 is a precious metal pipeline for conveying glass liquid and is made of platinum-rhodium alloy materials, wherein the Rh content needs to be controlled within 15%, and the basic strength requirement under the process condition of 1400 ℃ is met. The thickness of the platinum tube wall is 1.0-1.5 mm, and the platinum tube can bear long-term scouring and erosion action of glass melt without deformation.

The inner filling layer 2 is arranged at the periphery of the platinum pipe 1 and is used for sealing and protecting the platinum pipe 1; the inner filling layer 2 is made of aluminum pug, the main component of the aluminum pug is aluminum oxide, the content of the aluminum oxide is more than 99 percent, and the aluminum pug and industrial sodium silicate are mixed according to the proportion of 1:1 to form pug with a certain binding degree. In the filling process, firstly, pug is adopted to paint and cover the platinum pipe 1, then the thickness is gradually increased, and finally, the inner filling layer 2 with the thickness of about 15mm is formed.

Support frame 3, its structure is as shown in fig. 3, a plurality of "U" type groove of equidistant distribution on support frame 3, whole support frame 3 adopts isostatic pressing alumina brick to support, its compressive strength is greater than 100MPa, in the actual installation, treat the thorough solidification back of intussuseption layer 2, place support frame 3 round intussuseption layer 2 according to certain interval, its bottom surface should be with intussuseption layer 2 contact, distribute on the circumferencial direction according to the support needs, distribution quantity contains all arrangement and the quantity of this structure, support frame 3 is not once only put all around, but need cooperate heater strip 4 to go on in the synchronous installation of platinum pipe 1 and intussuseption layer 2's overall structure. When beginning to install heater strip 4 round the body promptly, with the first groove of the beginning one end of support frame 3, it is fixed with its coiling with heater strip 4, after accomplishing a week, all support frames 3 have already been fixed the completion, carry out endless installation wire winding.

The width of the U-shaped groove of the support frame 3 is related to the diameter of the heating wire 4, so that the installation is convenient, and the width of the U-shaped groove is about 50 percent larger than the diameter of the heating wire. The space between the grooves is a very important parameter index, which determines the heating power of the heating wires 4, and the smaller the space is, the more densely the heating wires 4 are installed, and the larger the heating power is; the larger the distance is, the looser the heating wire 4 is installed, and the smaller the heating power is. According to the current equipment design scheme, the problem that insulation failure of the heating wires 4 possibly exists in a too close mode needs to be considered, and the interval of the heating wires 4 is designed to be optimal in the range of 8-15 mm. The thickness of the support frame 3 is 5mm, and the height is about 3 times of that of the support frame supported by the heating wires 4.

The heating wire 4 is made of pure platinum, the Pt content needs to be more than 99.9%, the surface of the heating wire 4 needs to have no defects of scratches, missing points and the like, the platinum heating wire 4 can bear 1600 ℃ temperature, but the long-time operation is generally controlled within the range of about 1400 ℃, actually, when the temperature exceeds 1000 ℃, the heating wire 4 can generate oxidation volatilization phenomena, and along with the higher temperature, the volatilization rate is faster, the volatilization is related to the temperature, and the volatilization is also related to the sealing degree.

The diameter of the heating wire 4 is 2.5-4.0 mm, the heating wire is related to heating power required to be provided, the larger wire diameter can bear higher limiting current, and then higher power can be generated, and after the wire diameter of the heating wire 4 is determined, the size of a U-shaped groove of the corresponding support frame 3 and the height of the support frame 3 are determined synchronously.

The outer grouting layer 5 is filled in the space between the outer supporting brick 6 and the inner filling layer 2, the supporting frame 3 and the heating wire 4, the slurry is dilute slurry formed by mixing alumina filler, industrial sodium silicate and water according to the ratio of 1:1.5:1.5, the slurry has certain fluidity, the slurry is grouted from one side to the other side of the whole heating module, an outlet in the circumferential direction of the other side is sealed in advance, so that the dilute slurry can fully flow into the outer grouting layer 5, and after grouting is completed, one side of grouting is sealed by using alumina mud by adopting the same method to form a complete filling layer.

The external supporting brick 6 is made of the same material as the supporting frame 3, the internal part of the external supporting brick 6 is of the same structure with the platinum pipe 1, the gap of a grouting layer is guaranteed to be 20-30 mm, and the thin slurry can flow sufficiently easily.

The utility model adopts the integrated heating device formed by system grouting aiming at the heating wire, realizes the omnibearing sealing aiming at the heating wire, effectively inhibits the oxidation volatilization rate of the heating wire, and prolongs the service life of the heating wire. In the practical application of the wire body, compared with the traditional heater brick winding method, the service life of the heating wire installed by adopting the method provided by the utility model is prolonged by at least more than 30%.

The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.

Claims

1. The integrated heating device for the platinum channel is characterized by comprising an inner filling layer (2), wherein the inner filling layer (2) is arranged on the periphery of a platinum pipe (1), a plurality of support frames (3) are radially arranged on the outer wall of the inner filling layer (2), each support frame (3) is axially provided with a plurality of U-shaped grooves, heating wires (4) are wound in the U-shaped grooves, and the heating wires (4) are wound from one end to the other end of the platinum pipe (1);

an external supporting brick (6) is sleeved on the platinum pipe (1) wound with the upper heating wire (4), and an external grouting layer (5) is filled in a gap between the external supporting brick (6) and the platinum pipe (1) wound with the upper heating wire (4).

2. The integrated heating device for platinum channels according to claim 1, characterized in that the thickness of the inner filling layer (2) is 15 mm.

3. The integrated heating device for the platinum channel as claimed in claim 1, wherein the distance between adjacent U-shaped grooves is 8-15 mm.

4. An integrated heating device for platinum channels according to claim 1, characterised in that the diameter of the heating wire (4) is 2.5-4.0 mm.

5. The integrated heating apparatus for platinum passage according to claim 1, wherein the heating wire (4) is a platinum heating wire.

6. The integrated heating device for the platinum channel as claimed in claim 1, wherein the supporting frames (3) are radially and uniformly distributed on the outer wall of the inner filling layer (2).

7. The integrated heating device for the platinum channel as claimed in claim 1, wherein the U-shaped grooves are uniformly distributed on the support frame (3) along the axial direction.