CN219861040U - Rotary tube assembly and muffle furnace - Google Patents

Abstract

The present disclosure provides a rotatory pipe assembly and muffle furnace, relates to glass pipe production technical field. The rotating tube assembly includes: a rotating tube body; a heat insulation buffer layer covering the outer peripheral surface of the rotary pipe body; and a protective layer covering the outer peripheral surface of the heat insulation buffer layer, wherein the protective layer is made of platinum; the technical scheme provided by the disclosure can realize the technical effects of reducing the erosion of the rotary tube generated under the continuous flushing of glass liquid, prolonging the service life of the rotary tube and improving the yield of products.

Description

Rotary tube assembly and muffle furnace

Technical Field

The disclosure relates to the technical field of glass tube production, in particular to a rotary tube assembly and a muffle furnace.

Background

In the process of forming a neutral medicinal glass tube, molten glass flows down through a feed pipe (groove) and is wound on a rotating tube rotating in a muffle furnace, the molten glass flows to an end head in a flattened manner at a high temperature (about 1250 ℃), an automatic blowing system blows air to a mandrel through hole to form a tube bubble, the tube bubble is pulled out of the muffle furnace by a tractor, the temperature is gradually reduced through a forming chamber and a runway, and finally, the glass tube with a certain length is cut by a primary cutting device. The rotary pipe is a key component for glass pipe molding, and is assembled on a heat-resistant steel mandrel through matching of an end head, a gland, a sleeve, a pressure spring, a lock nut and the like, the mandrel is arranged in a hollow shaft sleeve of a Danner machine, and power is provided by a servo motor, bevel gear transmission is carried out, so that rotation is completed.

At present, the material of revolving tube mostly is refractory material, mainly has: sillimanite, mullite, corundum mullite, quartz, ceramic and the like, and the materials are continuously flushed by high-temperature glass liquid in the actual production process, so that the rotating tube is corroded quickly and has short service life, and the glass tube is easy to generate stones, nodes, bubbles and the like after being corroded, so that the appearance and the yield of products are seriously influenced.

Therefore, how to reduce the erosion of the rotary tube caused by continuous flushing of the glass liquid, and to improve the service life and the yield of the product are the problems to be solved at present.

Disclosure of Invention

One technical problem to be solved by the present disclosure is: how to reduce the erosion of the rotary tube under the continuous scouring of the glass liquid, and improve the service life and the yield of the product.

To solve the above technical problem, an embodiment of the present disclosure provides a rotary pipe assembly, which further includes: a rotating tube body;

the heat insulation buffer layer covers the outer peripheral surface of the rotary pipe main body; and

and the protective layer is covered on the outer peripheral surface of the heat insulation buffer layer, and the material of the protective layer comprises platinum.

In some embodiments, further comprising: the mandrel is a hollow shaft body, and the rotary pipe body is sleeved outside the mandrel; and

the inner end is arranged in the groove and is used for being connected with the air outlet end of the mandrel.

In some embodiments, the groove bottom surface of the groove and the surface of the built-in end matched with the groove bottom surface of the groove are conical surfaces.

In some embodiments, further comprising: the air outlet end of the mandrel is provided with a ring groove corresponding to the built-in end along the circumferential direction, and the half ring is positioned between the ring groove and the built-in end;

the surfaces of the half ring and the ring groove which are matched with each other and the surfaces of the half ring and the built-in end socket which are matched with each other are conical surfaces;

wherein the diameter of the conical surface gradually increases in the direction from the air inlet end to the air outlet end of the mandrel.

In some embodiments, the swivel tube body further comprises:

the rivets are uniformly arranged in the circumferential direction and the axial direction of the protective layer and used for fixing the protective layer on the rotary tube main body.

In some embodiments, the material of the protective layer is a platinum-rhodium alloy.

In some embodiments, the insulating buffer layer is made of ceramic fiber.

In some embodiments, the rotating tube body is nichrome.

In some embodiments, the swivel body is a cylindrical swivel with a consistent outer diameter along its radial direction.

The embodiment of the disclosure also provides a muffle furnace, which comprises: the rotary tube assembly described above.

Through above-mentioned technical scheme, the rotatory tub of subassembly and muffle furnace that this disclosure provided, rotatory tub of body includes rotatory tub of main part and layer by layer set up in the outside thermal-insulated buffer layer and the protective layer of rotatory tub of body, rotatory tub of main part is the main part of rotatory tub of body, mainly bear the weight and the axial assembly force of glass liquid, thermal-insulated buffer layer is smooth laminating on the outer peripheral face of rotatory tub of main part, can play thermal-insulated effect, can alleviate the expansion that produces because the nuances of expansion coefficient between rotatory tub of main part and the protective layer simultaneously, the protective layer covers in thermal-insulated buffer layer's outer peripheral face, for outermost layer structure, in the part of production process, through adopting the material that includes platinum to make the protective layer, make it have high temperature resistant, oxidation resistance and corrosion resistance etc. performance, neither can receive the erosion of glass liquid, also can not pollute high quality glass liquid, can prolong the life of rotatory tub of body greatly, and can effectively improve the yields of product, and can not produce the phenomenon of cracking in toasting, heat exchange and normal use, because of not erosion, in the production process also need exist after the stability is good.

Drawings

In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and other drawings may be obtained according to these drawings without inventive effort to a person of ordinary skill in the art.

FIG. 1 is a schematic cross-sectional view of a rotary union body of a rotary union assembly according to embodiments of the present disclosure;

FIG. 2 is a schematic illustration of another cross-sectional configuration of a spin tube body of a spin tube assembly disclosed in an embodiment of the present disclosure;

FIG. 3 is a schematic cross-sectional view of a spin tube body and a built-in tip of a spin tube assembly according to an embodiment of the present disclosure;

fig. 4 is a schematic cross-sectional view of a built-in tip of a rotary union assembly according to an embodiment of the present disclosure.

Reference numerals illustrate:

1. a rotary pipe body; 11. a rotating tube body; 111. a groove; 111a, a first contact surface; 12. a thermal insulation buffer layer; 13. a protective layer; 14. a rivet; 2. a mandrel; 3. a built-in end is arranged; 3a, a second contact surface; 4. a half ring.

Detailed Description

Embodiments of the present disclosure are described in further detail below with reference to the drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the disclosure and not to limit the scope of the disclosure, which may be embodied in many different forms and not limited to the specific embodiments disclosed herein, but rather to include all technical solutions falling within the scope of the claims.

The present disclosure provides these embodiments in order to make the present disclosure thorough and complete, and fully convey the scope of the disclosure to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values set forth in these embodiments should be construed as exemplary only and not limiting unless otherwise specifically stated.

In the description of the present disclosure, unless otherwise indicated, the meaning of "plurality" is greater than or equal to two; the terms "upper," "lower," "left," "right," "inner," "outer," and the like indicate an orientation or positional relationship merely for convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the devices or elements being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present disclosure. When the absolute position of the object to be described is changed, the relative positional relationship may be changed accordingly.

Furthermore, the use of the terms first, second, and the like in this disclosure do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The "vertical" is not strictly vertical but is within the allowable error range. "parallel" is not strictly parallel but is within the tolerance of the error. The word "comprising" or "comprises" and the like means that elements preceding the word encompass the elements recited after the word, and not exclude the possibility of also encompassing other elements.

It should also be noted that, in the description of the present disclosure, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the terms in the present disclosure may be understood as appropriate by those of ordinary skill in the art. When a particular device is described as being located between a first device and a second device, there may or may not be an intervening device between the particular device and either the first device or the second device.

All terms used in the present disclosure have the same meaning as understood by one of ordinary skill in the art to which the present disclosure pertains, unless specifically defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods, and apparatus should be considered part of the specification.

Example 1

Referring to fig. 1, an embodiment of the present utility model provides a rotary pipe assembly including: a rotary pipe body 11; a heat insulating buffer layer 12 covering the outer peripheral surface of the rotary pipe body 11; and a protective layer 13 covering the outer peripheral surface of the thermal insulation buffer layer 12, wherein the material comprises platinum.

Specifically, the present embodiment provides a rotary tube assembly, which is applied to a process of producing glass tubes by the danna method, and the rotary tube assembly includes a rotary tube body 1 and related connection structures, such as: dabber 2, pressure spring, gland, end etc. rotating tube body 1 and dabber 2 coaxial and cover establish in dabber 2's outside, are located dabber 2's end of giving vent to anger, and rotating tube body 1's front end and rear end are supported through end and gland respectively, and the rear end provides axial force through the pressure spring to realize rotating tube body 1's support is fixed. In the glass tube forming process, glass liquid flows down through a feed pipe (groove) and is wound on a rotating pipe rotating in a muffle furnace, the flow direction end is evenly flattened at high temperature (about 1250 ℃), an automatic blowing system blows air to a through hole of a mandrel 2 to form a tube bubble, the tube bubble is pulled out of the muffle furnace by a tractor, gradually cooled through a forming chamber and a runway, and finally, the glass tube with a certain length is cut by a primary cutting device. At present, the rotating tube is made of refractory materials, and is continuously flushed by high-temperature glass liquid in the production process, the rotating tube is corroded quickly under the continuous flushing of the high-temperature glass liquid, so that the service life is short, the rotating tube is generally within 45 days, the problems of stones, nodes, bubbles and the like of the glass tube can be caused after the rotating tube is corroded, the appearance and the yield of the glass tube are seriously influenced, in addition, the rotating tube is easy to crack and scrap due to poor thermal shock resistance of the refractory materials in the pre-baking and heat exchanging processes of the rotating tube, in addition, refraction is easily caused due to uneven corrosion in the later use period of the rotating tube, the thickness deviation of the glass tube wall is excessive, the size yield of a product is influenced, and in order to ensure that the glass liquid material belt (winding position) avoids the corrosion position, the rotating tube is required to be withdrawn 1-3mm every day, so that the post-use molding process is frequently fluctuated.

In order to solve the problems in the production, the utility model adopts the technical scheme that a main structure of a rotary pipe assembly, namely a rotary pipe body 1, is formed by adopting a multi-layer structure, and specifically comprises the following steps: the rotary pipe body 1 comprises a rotary pipe main body 11, a heat insulation buffer layer 12 and a protective layer 13, wherein the rotary pipe main body 11 is a main body part of the rotary pipe main body 1 and mainly bears the weight and the axial assembly force of glass liquid, a channel for penetrating the mandrel 2 is arranged in the middle of the rotary pipe main body, the external shape of the rotary pipe main body can be a cylinder, the front end of the rotary pipe main body is provided with a cone part, and the rotary pipe main body 11 can be made of nichrome material, so that the rotary pipe main body has good oxidation resistance and higher mechanical strength; the heat insulation buffer layer 12 is arranged between the rotary pipe main body 11 and the protective layer 13, is made of a material with good heat resistance, can be made of a ceramic fiber material, has a thickness of about 5mm, has a heat resistance of 1600 ℃, can play a role in heat insulation, can relieve expansion between the rotary pipe main body 11 and the protective layer 13 due to slight difference of expansion coefficients, and needs to be ensured to be flatly attached to the outer peripheral surface of the rotary pipe main body 11 when the heat insulation buffer layer 12 is formed; the protective layer 13 is a part directly contacted with high temperature glass liquid in the production process, and covers the outer peripheral surface of the heat insulation buffer layer 12, in order to avoid corrosion caused by the high temperature glass liquid, the protective layer 13 is made of high temperature resistant, oxidation resistant and corrosion resistant metal or alloy material, in the specific implementation, the material forming the protective layer 13 comprises platinum, and can be specifically pure platinum or alloy containing platinum, in the technical scheme adopted by the utility model, the protective layer 13 is made of platinum-rhodium alloy (such as platinum-rhodium-20) material, so that the protective layer 13 has the following properties: the melting point is about 1885 ℃, the hardness reaches 120HB, the tensile strength is about 483MPa, and the design can lead the outermost layer of the rotary tube body 1 not to be corroded by glass liquid, also not to pollute high-quality glass liquid, can solve the problems of easy corrosion and the like of the rotary tube made of refractory materials, and can effectively prolong the service life of the rotary tube body 1.

According to the above-mentioned embodiments, the rotary tube assembly is provided in the present utility model, the rotary tube body 1 includes the rotary tube main body 11, and the heat insulation buffer layer 12 and the protection layer 13 disposed outside the rotary tube main body 1 layer by layer, the rotary tube main body 11 is a main body component of the rotary tube main body 1, and mainly bears the weight and the axial assembly force of the glass liquid, the heat insulation buffer layer 12 is flatly attached to the outer circumferential surface of the rotary tube main body 11, so as to play a role of heat insulation, and meanwhile, the expansion generated between the rotary tube main body 11 and the protection layer 13 due to the slight difference of expansion coefficients can be relieved, the protection layer 13 covers the outer circumferential surface of the heat insulation buffer layer 12, and is an outermost layer structure, and in the production process, the part directly contacting the high-temperature glass liquid is made of the protection layer 13 by adopting the material including platinum, so that the protection layer has the performances of high temperature resistance, oxidation resistance, corrosion resistance, etc., and neither can be subject to the corrosion resistance of the glass liquid, nor pollute the high-quality glass liquid, the service life of the rotary tube main body 1 can be greatly prolonged, and the good product yield can be effectively improved, and the good product can not be broken due to the normal post-explosion process in baking, heat and use process.

Referring to fig. 1, in an implementation, the rotary tube assembly provided in this embodiment further includes: a plurality of rivets 14 are uniformly provided in the circumferential and axial directions of the protective layer 13 for fixing the protective layer 13 to the rotary pipe body 11.

Specifically, in order to achieve the fixation of the protective layer 13 and the rotary tube body 11, in the technical solution adopted in the present utility model, a plurality of rivets 14 may be adopted, and the protective layer 13 is uniformly disposed in the circumferential direction and the axial direction respectively so as to be connected to the rotary tube body 11, for example: the number of rivets 14 may be three, and the protective layer 13 is divided into three groups in the axial direction, and the three groups are uniformly distributed in the axial direction, each group including three rivets 14, and the three rivets 14 are uniformly distributed in the circumferential direction at the same axial position of the protective layer 13; of course, the number and distribution of rivets 14 is not limited thereto.

Referring to fig. 3 to 4, in a specific implementation, the rotary tube assembly provided in this embodiment further includes: the mandrel 2 is a hollow shaft body, and the rotary pipe body 1 is sleeved outside the mandrel 2; and the inner end head 3 is arranged in the groove 111, and the inner end head 3 is used for being connected with the air outlet end of the mandrel 2.

Specifically, the rotating pipe is coaxial with the mandrel 2 and sleeved outside the mandrel 2, and is positioned at the air outlet end of the mandrel 2, and the front end and the rear end of the rotating pipe are respectively supported by the end head and the gland.

Referring to fig. 3-4, in the embodiment, the bottom surface of the groove 111 and the surface of the built-in end 3 matching with the bottom surface of the groove 111 are both conical surfaces.

Specifically, at present, the contact surface of the end head and the rotary pipe body 1 is radial surface contact, in the technical scheme adopted by the utility model, the second contact surface 3a of the built-in end head 3 and the first contact surface 111a of the groove 111 of the rotary pipe body 11 are respectively conical surfaces which deviate in the radial direction, namely, the two conical surfaces contact each other, a specific deviation angle can be but is not limited to 15 degrees, and the problem of non-concentricity caused by dislocation of the rotary pipe body 1 and the built-in end head 3 in the using process can be solved by adopting the design, so that the problem of exceeding of the thickness deviation of the glass pipe wall can be avoided.

Specifically, referring to fig. 3, the air outlet end of the mandrel 2 is circumferentially provided with a ring groove corresponding to the built-in end 3, the huff ring 4 is disposed between the ring groove and the built-in end 3, the surface of the huff ring 4 and the ring groove, and the surface of the huff ring 4 and the built-in end 3, which are mutually matched, are conical surfaces, and the diameter of the conical surfaces is gradually increased in the direction from the air inlet end to the air outlet end of the mandrel 2.

Referring to fig. 2, in the embodiment, the spin tube body 1 is a cylindrical spin tube having a uniform outer diameter in a radial direction thereof.

Specifically, in order to reduce the cost, the utility model adopts the technical scheme that the conical part at the front end of the rotary pipe body 1 is canceled, and the rotary pipe body 11 and the protective layer 13 are provided with cylindrical shapes with consistent radial outer diameters, so that the cost and the processing difficulty can be reduced.

Example two

A second embodiment of the present utility model provides a rotary pipe assembly including: the rotary tube assembly described above.

Specifically, in the glass tube forming process, molten glass flows down through a feed pipe (groove) and is wound on a rotating pipe rotating in a muffle furnace, the molten glass flows to an end head in a flattened mode at a high temperature (about 1250 ℃), an automatic blowing system blows air to a through hole of a mandrel 2 to form a tube bubble, the tube bubble is pulled out of the muffle furnace by a tractor, the temperature of the tube is gradually reduced through a forming chamber and a runway, and finally, the tube is cut into glass tubes with a certain length by a primary cutting device. According to the technical scheme adopted by the utility model, the rotary pipe assembly comprises the rotary pipe body 1 formed by the rotary pipe main body 11, the heat insulation buffer layer 12 and the protective layer 13, the protective layer 13 on the outermost layer of the rotary pipe body 1 has the performances of high temperature resistance, oxidation resistance, corrosion resistance and the like, cannot be corroded by glass liquid, cannot pollute high-quality glass liquid, can greatly prolong the service life of the rotary pipe body 1, can effectively improve the yield of products, cannot generate burst phenomenon in baking, heat exchange and normal use, and has good process stability because the rotary pipe body is not corroded, and no back-off operation is needed in the production process.

Thus, various embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concepts of the present disclosure, some details known in the art are not described. How to implement the solutions disclosed herein will be fully apparent to those skilled in the art from the above description.

Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It will be understood by those skilled in the art that the foregoing embodiments may be modified and equivalents substituted for elements thereof without departing from the scope and spirit of the disclosure. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict.

Claims (10)

1. A rotary union assembly, comprising: swivel tube body (1), comprising:

a rotary pipe body (11);

a heat insulating buffer layer (12) covering the outer peripheral surface of the rotary pipe body (11); and

and a protective layer (13) which covers the outer peripheral surface of the heat insulation buffer layer (12) and is made of platinum.

2. The rotating tube assembly of claim 1, further comprising:

the mandrel (2) is a hollow shaft body, and the rotary pipe body (1) is sleeved outside the mandrel (2); and

the inner end (3) is arranged, a groove (111) is formed in the front end of the rotary pipe main body (11), and the inner end (3) is arranged in the groove (111) and is used for being connected with the air outlet end of the mandrel (2).

3. The rotating tube assembly of claim 2 wherein the rotating tube assembly comprises a tube,

the bottom surface of the groove (111) and the surface of the built-in end head (3) matched with the bottom surface of the groove (111) are conical surfaces.

4. The rotating tube assembly of claim 2, further comprising:

the half ring (4) is arranged at the air outlet end of the mandrel (2) along the circumferential direction, a ring groove corresponding to the built-in end (3), and the half ring (4) is positioned between the ring groove and the built-in end (3);

the surfaces of the half ring (4) and the ring groove which are matched with each other and the surfaces of the half ring (4) and the built-in end (3) which are matched with each other are conical surfaces;

the diameter of the conical surface gradually increases in the direction from the air inlet end to the air outlet end of the mandrel (2).

5. The rotating tube assembly of claim 1 wherein the rotating tube assembly comprises a tube,

the rotary pipe body (1) further includes:

and a plurality of rivets which are uniformly arranged in the circumferential direction and the axial direction of the protective layer (13) and are used for fixing the protective layer (13) on the rotary pipe main body (11).

6. The rotating tube assembly of claim 1 wherein the rotating tube assembly comprises a tube,

the material of the protective layer (13) is platinum-rhodium alloy.

7. The rotating tube assembly of claim 1 wherein the rotating tube assembly comprises a tube,

the heat insulation buffer layer (12) is made of ceramic fiber.

8. The rotating tube assembly of claim 1 wherein the rotating tube assembly comprises a tube,

the rotary pipe main body (11) is made of nichrome.

9. The rotating tube assembly of claim 1 wherein the rotating tube assembly comprises a tube,

the rotary pipe body (1) is a cylindrical rotary pipe with a consistent outer diameter along the radial direction.

10. A muffle furnace, comprising:

a rotary union assembly as claimed in any one of claims 1 to 9.