Feeding heat preservation device for glass production and feeding structure comprising feeding heat preservation device

Abstract

The invention discloses a feeding heat preservation device for glass production and a feeding structure comprising the device, the heat preservation device comprises a heat preservation sleeve, blocking handles are distributed on the outer side face of the heat preservation sleeve in the circumferential direction, the heat preservation sleeve comprises a left half sleeve and a right half sleeve which are split in the axial direction, and during use, the left half sleeve and the right half sleeve are oppositely spliced to wrap a feeding pipe; heat preservation cotton is laid on the outer edge of the heat preservation sleeve in the circumferential direction through the blocking handle, heat loss of the feeding pipe is reduced through the heat preservation sleeve and the heat preservation cotton, the temperature reduction amplitude of molten glass is reduced, the problem that the temperature is prone to being reduced when the molten glass flows through the feeding pipe can be effectively solved, and the effect of improving the forming quality and the production stability is achieved. Besides, the heat preservation sleeve is composed of a heat preservation sleeve section, a buffering sleeve section and a bearing sleeve section in the axial direction, the heat preservation sleeve section, the buffering sleeve section and the bearing sleeve section are each composed of two sleeve sections which are split in the axial direction, the three sleeve sections on the same side are axially spliced to form a left half sleeve and a right half sleeve, and the modular structure is convenient to install and disassemble.

Description

Technical Field

[0001] The invention belongs to the technical field of material supply passages in glass forming, and in particular relates to a material supply and heat preservation device for glass production and a material supply structure containing the device. Background Art

[0002] In the production process of ultra-thin microcrystalline glass, the molding method and the temperature, viscosity and flow rate of the glass liquid during molding are crucial to the molding quality. When calendering ultra-thin microcrystalline glass, the glass liquid is vertically transported from the discharge port of the platinum channel feeding section to the front and rear calendering rollers through a feed pipe. The glass liquid is exposed to the air before flowing out of the feed pipe and reaching the front and rear calendering rollers. The temperature of the glass liquid will drop significantly, which can easily lead to an increase in the viscosity of the glass liquid and a decrease in the pulling amount, which is not conducive to calendering molding. Therefore, in order to prevent the temperature of the glass liquid from dropping too much before reaching the front and rear calendering rollers, a feeding device for glass calendering method such as the one disclosed in Chinese patent CN221940314U is generally provided between the feed pipe and the front and rear calendering rollers. The specific connection structure is as shown in the attached specification of this application. Fig.11 As shown, both ends of the feed pipe 32 are connected to the discharge port of the feed section 31 and the feed port of the feed device 33 respectively. The feed device heats the molten glass flowing out from the feed section through the feed pipe, and guides the molten glass 34 to flow out in a strip shape for easy calendering.

[0003] Although the feeding device can regulate the temperature of the molten glass when it reaches the front and rear calendering rollers by heating the molten glass flowing through it, it ignores the fact that the feeding pipe exposed to the air between the feeding section and the feeding device is also likely to cause the temperature of the molten glass to drop. In addition, because the feeding pipe extends too far into the feeding device, it will affect the effect of the feeding device in regulating the temperature of the molten glass and guiding the molten glass to flow out in a strip shape. In addition, in order to meet the discharge requirements of the feeding section, the feeding pipe between the feeding section and the feeding device must not only exist, but also have a length requirement. The temperature drop of the molten glass in the feeding pipe will not only affect the discharge of the feeding section, but also limit the effect of the feeding device in regulating the temperature of the molten glass, which may easily lead to problems such as fluctuations in the discharge flow rate of the feeding device, uneven discharge distribution and crystallization of the discharge. Therefore, in order to improve the molding quality and production stability, it is necessary to design a heat preservation device suitable for the feeding pipe. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a feeding insulation device for glass production and a feeding structure containing the device, so as to solve the technical problem that the temperature of the glass liquid is easily reduced when flowing through the feeding pipe, thereby achieving the effect of improving the molding quality and production stability.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A feeding insulation device for glass production includes an insulation sleeve, which is composed of an axially split and detachable left half sleeve and a right half sleeve that are relatively spliced ​​together. A plurality of baffles are distributed on the outer circumference of the insulation sleeve, and the baffles include a baffle and an extension portion. The extension portion is connected to the outer side surface of the insulation sleeve, and the end of the baffle is arranged at an end of the extension portion away from the outer side surface of the insulation sleeve. The length direction of the baffle corresponds to the axial direction of the insulation sleeve, and a spacing is arranged with the outer side surface of the insulation sleeve, and the spacing is used to make way for thermal insulation cotton laid on the outer circumference of the insulation sleeve so as to fix the thermal insulation cotton laid outside the insulation sleeve through the baffle.

[0007] Furthermore, the insulation sleeve is divided into an insulation sleeve section, a buffer sleeve section and a load-bearing sleeve section with increasing outer diameters in the axial direction. The buffer sleeve section is located between the insulation sleeve section and the load-bearing sleeve section, and the axial dimension of the insulation sleeve section is larger than the sum of the axial dimensions of the buffer sleeve section and the load-bearing sleeve section; the gear lever is located outside the insulation sleeve section, and a circle of receiving grooves for filling insulation cotton is provided on the end surface of the insulation sleeve section away from the load-bearing sleeve section.

[0008] Furthermore, the axial dimension ratio of the heat-insulating sleeve section, the buffer sleeve section and the load-bearing sleeve section is 4-5:1-1.5:2-2.5.

[0009] Furthermore, the insulation sleeve section, the buffer sleeve section and the load-bearing sleeve section are independent of each other and can be detachably connected. The insulation sleeve section is composed of an axially split left half insulation section and a right half insulation section, the buffer sleeve section is composed of an axially split left half buffer section and a right half buffer section, and the load-bearing sleeve section is composed of an axially split left half load-bearing section and a right half load-bearing section; the left half insulation section, the left half buffer section and the left half load-bearing section are axially connected to form the left half sleeve, and the right half insulation section, the right half buffer section and the right half load-bearing section are axially connected to form the right half sleeve.

[0010] Furthermore, a first expansion hole coaxial with the inner hole of the insulation sleeve is provided on the end surface of the load-bearing sleeve section away from the insulation sleeve section, and the first expansion hole forms a first annular overflow prevention cavity outside the inner hole of the insulation sleeve.

[0011] Furthermore, a second expansion hole coaxial with the inner hole of the insulation sleeve is provided on the end surface of the buffer sleeve section away from the insulation sleeve section, and the second expansion hole forms an annular second overflow prevention cavity outside the inner hole of the insulation sleeve.

[0012] Furthermore, the axial dimension of the buffer sleeve section is expressed as Q, and the axial dimension of the first anti-overflow cavity is expressed as q, then Q=2×q should be satisfied.

[0013] Furthermore, if the inner diameter of the heat-insulating sleeve section is represented by r, the minimum inner diameter of the buffer sleeve section is represented by Z1, and the minimum inner diameter of the load-bearing sleeve section is represented by Z2, then r<Z1≤r+0.05cm and r<Z2≤r+0.05cm should be satisfied.

[0014] Furthermore, the maximum inner diameter of the buffer sleeve section is represented as C1 and the outer diameter is represented as X, then X×3 / 5<C1≤X×4 / 5 and Z1×7 / 3<X≤Z1×8 / 3 should be satisfied.

[0015] Furthermore, the maximum inner diameter of the load-bearing sleeve section is denoted as C2 and the outer diameter is denoted as K, then X×3 / 5<C2≤X×7 / 10 and X×8 / 3<K≤X×10 / 3 should be satisfied.

[0016] Furthermore, a plurality of exhaust holes are circumferentially distributed on the end surface of the buffer sleeve section close to the heat-insulating sleeve section. The exhaust holes are located outside the heat-insulating sleeve section and axially connected to the second anti-overflow cavity.

[0017] Furthermore, splicing grooves are provided on the circumferential end surfaces of the left half insulation section, the left half buffer section and the left half load-bearing section, and splicing blocks are correspondingly provided on the circumferential end surfaces of the right half insulation section, the right half buffer section and the right half load-bearing section. The splicing blocks are located in the corresponding splicing grooves to achieve relative splicing of the left half sleeve and the right half sleeve.

[0018] Furthermore, a plurality of positioning holes are circumferentially distributed on the end surfaces of the insulation sleeve section and the buffer sleeve section facing the load-bearing sleeve section, and a plurality of positioning pins are circumferentially distributed on the end surfaces of the buffer sleeve section and the load-bearing sleeve section facing the insulation sleeve section. The positioning pins on the buffer sleeve section are inserted one-to-one into the positioning holes on the insulation sleeve section, and the positioning pins on the load-bearing sleeve section are inserted one-to-one into the positioning holes on the buffer sleeve section, so as to realize the detachable connection between the insulation sleeve section, the buffer sleeve section and the load-bearing sleeve section.

[0019] Furthermore, in the radial direction, the splicing groove and the splicing block on the load-bearing sleeve section are located outside the buffer sleeve section, and a first limiting hole is opened on the end face of the load-bearing sleeve section close to the heat-insulating sleeve section. The first limiting hole is axially connected to the splicing groove on the load-bearing sleeve section, and a second limiting hole coaxial with the first limiting hole is axially penetrated on the splicing block of the load-bearing sleeve section. The load-bearing sleeve section has a limiting pin movably inserted in the first limiting hole and the second limiting hole.

[0020] The present invention also includes a feeding structure for glass production, which includes a feeding section of a platinum channel, a feeding pipe, a feeding device and the feeding and insulation device for glass production as described above, the feeding pipe is vertically arranged below the feeding section and the upper end is connected to the discharge port of the feeding section, the feeding device is located below the feeding pipe and the feed port of the feeding device is connected to the lower end of the feeding pipe; the insulation sleeve is sleeved outside the feeding pipe, the end face of the insulation sleeve section away from the load-bearing sleeve section abuts and seals with the plane where the discharge port is located, the end face of the load-bearing sleeve section away from the insulation sleeve section abuts and seals with the plane where the feed port is located, the distance between the plane where the discharge port is located and the plane where the feed port is located is denoted as h, and the axial size of the insulation sleeve is denoted as H, then H<h≤H+0.4cm should be satisfied.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The feeding insulation device for glass production described in the present invention is used for the insulation of the feeding pipe between the feeding section and the feeding device. When in use, the left half sleeve and the right half sleeve are relatively spliced ​​and wrapped around the outside of the feeding pipe, and then insulation cotton is laid circumferentially on the outside of the insulation sleeve, and the insulation cotton is squeezed through between each baffle and the insulation sleeve in turn, so that the insulation cotton is fixed outside the insulation sleeve and keeps it in contact, and the heat loss of the feeding pipe is reduced by the insulation sleeve and the insulation cotton, thereby reducing the temperature drop of the glass liquid flowing through it; the present invention can effectively solve the problem that the temperature of the glass liquid is easy to drop when it flows through the feeding pipe, and achieves the effect of improving the molding quality and production stability.

[0023] 2. The feeding and heat preservation device for glass production described in the present invention wraps the feeding pipe by relatively splicing the left half sleeve and the right half sleeve. Not only does it not need to move the feeding device for installation and disassembly, it is relatively simple to use, and the influence of thermal expansion on the structure of the insulation sleeve can be reduced. Insulation cotton is wound around the outside of the insulation sleeve, which is beneficial to improving the heat insulation and thermal insulation effects of the insulation sleeve. The insulation cotton is fixed to the outside of the insulation sleeve by the stopper, which not only keeps the insulation cotton and the insulation sleeve in close fit, but also avoids the insulation cotton from falling off due to thermal expansion, which is beneficial to improving the reliability of use and maintaining good heat insulation and thermal insulation effects. There is no need to use other fixings for the insulation cotton, and it is convenient for installation, disassembly and replacement.

[0024] 3. The feeding insulation device for glass production described in the present invention is designed to have an insulation sleeve composed of an insulation sleeve section with increasing outer diameters, a buffer sleeve section and a load-bearing sleeve section. The size of the insulation sleeve section is adapted to the feeding pipe to reduce the overall weight and save the amount of insulation cotton. The buffer sleeve section is used for size transition and to improve the structural strength. The load-bearing sleeve section is used to cooperate with the feeding device over a large area to improve the sealing and reduce the possibility of glass liquid overflow. A first anti-overflow cavity is formed on the end surface of the load-bearing sleeve section away from the insulation sleeve section through a first expanded hole. When glass liquid overflows from the gap, the glass liquid will enter the first anti-overflow cavity to cool and solidify, thereby preventing the glass liquid from continuing to overflow.

[0025] 4. The feeding and insulation device for glass production described in the present invention is assembled on the feeding device by first axially splicing the left half sleeve and the right half sleeve separately, and then closing and splicing the left half sleeve and the right half sleeve to obtain the insulation sleeve; in the axial direction, the positioning pin cooperates with the positioning hole, which not only facilitates assembly and positioning, but also helps to improve the radial integrity of the left half sleeve and the right half sleeve after assembly, and avoids thermal expansion and dislocation during use; in the radial direction, the limit pin cooperates with the first limit hole and the second limit hole respectively, so as to lock the relative movement of the left half sleeve and the right half sleeve in the radial direction, so that the insulation sleeve section and the buffer sleeve section do not need to be separately provided with fasteners for locking radial movement, which helps to simplify the structure and reduce the difficulty of loading and unloading. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A three-dimensional diagram of a feeding and heat preservation device for glass production according to an embodiment;

[0027] Figure 2 It is a three-dimensional view of the left half sleeve of the embodiment;

[0028] Figure 3 It is a three-dimensional diagram of the right half sleeve of the embodiment;

[0029] Figure 4 A is a three-dimensional diagram of the thermal insulation sleeve segment in a split state according to the embodiment;

[0030] Figure 5 A perspective view B of the thermal insulation sleeve section in a split state according to the embodiment;

[0031] Figure 6 A is a three-dimensional diagram of the buffer sleeve segment in a split state according to the embodiment;

[0032] Figure 7 A perspective view B of the separated state of the buffer sleeve segment according to the embodiment;

[0033] Figure 8 A is a three-dimensional diagram of the load-bearing sleeve section in a split state with some limit pins hidden;

[0034] Fig. 9A perspective view B of the split state of the load-bearing sleeve section described in the embodiment;

[0035] Fig.10 A perspective view of a feeding structure for glass production according to an embodiment;

[0036] Fig.11 for Fig.10 The stereoscopic view of the feeding and heat preservation device for glass production is hidden;

[0037] Among them, the left half sleeve 1, the right half sleeve 2, the gear handle 3, the baffle 4, the extension part 5, the insulation sleeve section 6, the buffer sleeve section 7, the load-bearing sleeve section 8, the first expansion hole 9, the first anti-overflow chamber 10, the left half insulation section 11, the right half insulation section 12, the left half buffer section 13, the right half buffer section 14, the left half load-bearing section 15, the right half load-bearing section 16, the second expansion hole 17, the second anti-overflow chamber 18, the exhaust hole 19, the connecting groove 20, the splicing groove 21, the splicing block 22, the first limiting hole 23, the second limiting hole 24, the limiting pin 25, the pull ring 26, the positioning hole 27, the positioning pin 28, the accommodating groove 29, the handle groove 30, the feeding section 31, the feeding pipe 32, the feeding device 33, and the glass liquid 34. DETAILED DESCRIPTION

[0038] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0039] Example:

[0040] See also Figure 1 , Figure 2 and Figure 3 A feeding insulation device for glass production includes an insulation sleeve, which is composed of an axially split left half sleeve 1 and a right half sleeve 2 relatively spliced ​​together. A plurality of baffles 3 are distributed on the outer circumference of the insulation sleeve. The baffles 3 include baffles 4 and extensions 5. There are two extensions 5 and they are respectively located at both ends of the baffles 4. One end of the extension 5 is connected to the end of the baffle 4, and the other end is connected to the outer side surface of the insulation sleeve. The length direction of the baffle 4 corresponds to the axial direction of the insulation sleeve. The baffle 4 leaves a spacing with the outer side surface of the insulation sleeve through the extension 5. The spacing is used to make room for laying insulation cotton on the outer circumference of the insulation sleeve so that the insulation cotton laid outside the insulation sleeve can be fixed by the baffles 4.

[0041] The feeding and heat-insulating device for glass production of the present invention is used for heat-insulating the feeding pipe 32 between the feeding section 31 and the feeding device 33. When in use, the left half sleeve 1 and the right half sleeve 2 are relatively spliced ​​and wrapped around the outside of the feeding pipe 32, and then heat-insulating cotton is laid circumferentially on the outside of the heat-insulating sleeve, and the heat-insulating cotton is squeezed and passed through between each baffle 4 and the heat-insulating sleeve in turn, so that the heat-insulating cotton is fixed outside the heat-insulating sleeve and keeps fitting, and the heat loss of the feeding pipe 32 is reduced by the heat-insulating sleeve and the heat-insulating cotton, thereby reducing the temperature drop of the glass liquid 34 flowing therein; the feeding and heat-insulating device for glass production relatively splices and wraps the feeding pipe 32 with the left half sleeve 1 and the right half sleeve 2, so that not only the feeding device 33 does not need to be moved during installation and disassembly, The use is relatively simple and can reduce the influence of thermal expansion on the insulation sleeve structure. The insulation cotton is wound around the outside of the insulation sleeve, which is beneficial to improving the thermal insulation and heat preservation effects of the insulation sleeve. The insulation cotton is fixed to the outside of the insulation sleeve by the stopper 3, which not only makes the insulation cotton and the insulation sleeve keep a close fit, but also avoids the insulation cotton from falling off due to thermal expansion, which is beneficial to improving the reliability of use and maintaining good thermal insulation and heat preservation effects. There is no need to use other fixings for the insulation cotton, which is convenient for installation and disassembly and replacement. The present invention is used for the insulation of the feed pipe 32 between the feed section 31 and the feed device 33, which can effectively solve the problem that the temperature of the glass liquid 34 is easy to drop when flowing through the feed pipe 32, thereby achieving the effect of improving the molding quality and production stability.

[0042] See also Figure 1 The insulation sleeve is divided into an insulation sleeve section 6, a buffer sleeve section 7 and a load-bearing sleeve section 8 with increasing outer diameters in the axial direction. The buffer sleeve section 7 is located between the insulation sleeve section 6 and the load-bearing sleeve section 8. The gear lever 3 is located outside the insulation sleeve section 6. A circle of receiving grooves 29 for filling insulation cotton is provided on the end surface of the insulation sleeve section 6 away from the load-bearing sleeve section 8; the axial dimension of the insulation sleeve section 6 is greater than the sum of the axial dimensions of the buffer sleeve section 7 and the load-bearing sleeve section 8. Specifically, the axial dimension ratio of the insulation sleeve section 6, the buffer sleeve section 7 and the load-bearing sleeve section 8 is 4-5:1-1.5:2-2.5.

[0043] In this way, the insulation sleeve is designed to consist of an insulation sleeve section 6, a buffer sleeve section 7 and a load-bearing sleeve section 8 with increasing outer diameters. The size of the insulation sleeve section 6 is adapted to the feeding pipe 32 to reduce the overall weight and save the amount of insulation cotton. The buffer sleeve section 7 is used for size transition and to improve the structural strength. The load-bearing sleeve section 8 is used to cooperate with the feeding device 33 over a large area to improve the sealing and reduce the possibility of overflow of the glass liquid 34. In addition, the buffer sleeve section 7 and the load-bearing sleeve section 8, which have a relatively small axial size and a certain radial size, can also provide a certain insulation effect for the feeding pipe 32; the accommodating groove 29 is used to fill the insulation cotton. When the insulation sleeve is installed between the feeding section 31 and the feeding device 33, the insulation cotton separates the insulation sleeve from the feeding section 31, which can not only reduce heat transfer and avoid affecting the operation of the platinum channel and the feeding device 33, but also improve the reliability of the sealing cooperation between the insulation sleeve and the feeding section 31.

[0044] See also Figure 4 , Figure 6 and Figure 8 The insulation sleeve section 6, the buffer sleeve section 7 and the load-bearing sleeve section 8 are independent of each other and can be detachably connected. The insulation sleeve section 6 is composed of an axially split left half insulation section 11 and a right half insulation section 12, the buffer sleeve section 7 is composed of an axially split left half buffer section 13 and a right half buffer section 14, and the load-bearing sleeve section 8 is composed of an axially split left half load-bearing section 15 and a right half load-bearing section 16; the left half insulation section 11, the left half buffer section 13 and the left half load-bearing section 15 are axially connected to form the left half sleeve 1, and the right half insulation section 12, the right half buffer section 14 and the right half load-bearing section 16 are axially connected to form the right half sleeve 2.

[0045] In this way, the insulation sleeve is divided into a mutually independent insulation sleeve section 6, a buffer sleeve section 7 and a load-bearing sleeve section 8 in the axial direction, and the left half sleeve 1 is divided into a left half insulation section 11, a left half buffer section 13 and a left half load-bearing section 15, and the right half sleeve 2 is divided into a right half insulation section 12, a right half buffer section 14 and a right half load-bearing section 16. Not only is the weight and volume of each independent component reduced by further splitting, which is also more conducive to installation and disassembly and storage, but the structural composition of the insulation sleeve is also made more dispersed, and the radial and axial fitting clearances of each component leave a margin for thermal expansion, so as to further reduce the influence of thermal expansion on the insulation sleeve structure.

[0046] See also Figure 4 , Figure 6 and Figure 8 The left half insulation section 11, the left half buffer section 13 and the left half load-bearing section 15 are each provided with a splicing groove 21 on their circumferential end surfaces, and the right half insulation section 12, the right half buffer section 14 and the right half load-bearing section 16 are each provided with a splicing block 22 on their circumferential end surfaces, and the splicing block 22 is located in the corresponding splicing groove 21.

[0047] In this way, the left half insulation section 11 and the right half insulation section 12, the left half buffer section 13 and the right half buffer section 14, the left half load-bearing section 15 and the right half load-bearing section 16 are all radially spliced ​​relative to each other, which is convenient for assembly and positioning, thereby realizing the relative splicing of the left half sleeve 1 and the right half sleeve 2.

[0048] See also Figure 5 , Figure 6 , Figure 7 and Figure 8 There are multiple positioning holes 27 distributed circumferentially on the end surfaces of the insulation sleeve section 6 and the buffer sleeve section 7 facing the load-bearing sleeve section 8, and there are multiple positioning pins 28 distributed circumferentially on the end surfaces of the buffer sleeve section 7 and the load-bearing sleeve section 8 facing the insulation sleeve section 6. The positioning pins 28 on the buffer sleeve section 7 are inserted one-to-one into the positioning holes 27 on the insulation sleeve section 6, and the positioning pins 28 on the load-bearing sleeve section 8 are inserted one-to-one into the positioning holes 27 on the buffer sleeve section 7, so as to realize the detachable connection between the insulation sleeve section 6, the buffer sleeve section 7 and the load-bearing sleeve section 8.

[0049] In this way, during assembly, the left half sleeve 1 and the right half sleeve 2 are first axially spliced ​​on the feeding device 33. Taking the left half sleeve 1 as an example, the left half load-bearing section 15 can be placed on the feeding device 33 first, with the side with the positioning pin 28 facing upwards, and then the left half buffer section 13 can be placed on the left half load-bearing section 15, and the positioning pins 28 on the left half load-bearing section 15 are inserted one-to-one into the positioning holes 27 of the left half buffer section 13, and finally the left half heat-insulating section 11 is placed on the left half buffer section 13, and the positioning pins 28 of the left half heat-insulating section 11 are inserted one-to-one into the positioning holes 27 of the left half buffer section 13, so as to obtain the left half sleeve 1, and the right half sleeve 2 is the same. Then the left half sleeve 1 and the right half sleeve 2 are folded and spliced ​​to obtain the heat-insulating sleeve; the positioning pins 28 cooperate with the positioning holes 27, which not only facilitates assembly and positioning, but also helps to improve the radial integrity of the left half sleeve 1 and the right half sleeve 2 after assembly, and avoids thermal expansion and dislocation during use.

[0050] See also Figure 1 , Figure 8 and Fig. 9 In the radial direction, the splicing groove 21 and the splicing block 22 on the load-bearing sleeve segment 8 are located outside the buffer sleeve segment 7. A first limiting hole 23 is opened on the end surface of the load-bearing sleeve segment 8 close to the insulation sleeve segment 6. The first limiting hole 23 is axially connected to the splicing groove 21 on the load-bearing sleeve segment 8. A second limiting hole 24 coaxial with the first limiting hole 23 is axially penetrated on the splicing block 22 of the load-bearing sleeve segment 8. The load-bearing sleeve segment 8 has a limiting pin 25 movably inserted in the first limiting hole 23 and the second limiting hole 24.

[0051] In this way, after the left half sleeve 1 and the right half sleeve 2 are closed and spliced ​​to obtain the insulation sleeve, the limit pin 25 is finally inserted into the first limit hole 23 and the second limit hole 24, so as to lock the relative movement of the left half sleeve 1 and the right half sleeve 2 in the radial direction; this design cooperates with the insertion of the positioning pin 28 into the positioning hole 27, so that the insulation sleeve section 6 and the buffer sleeve section 7 do not need to be separately provided with fasteners for locking radial movement, which is conducive to simplifying the structure and reducing the difficulty of installation and disassembly; in this embodiment, handle grooves 30 are respectively provided on the outer surfaces of the buffer sleeve section 7 and the load-bearing sleeve section 8, so that the position can be adjusted by hand to achieve splicing, and a pull ring 26 is provided on the upper end of the limit pin 25 to facilitate the insertion and removal of the limit pin 25.

[0052] See also Figure 2 , Figure 8 and Fig. 9 A first expansion hole 9 coaxial with the inner hole of the insulation sleeve is provided on the end surface of the load-bearing sleeve section 8 away from the insulation sleeve section 6. The first expansion hole 9 forms an annular first overflow prevention cavity 10 outside the inner hole of the insulation sleeve.

[0053] In this way, in order to facilitate installation and docking and avoid the influence of thermal expansion, a certain gap needs to be retained between the feed port of the feeding device 33 and the feeding pipe 32. However, when the feed amount of the feeding pipe 32 is greater than the discharge amount of the feeding device 33, the glass liquid 34 is likely to overflow from the gap. To avoid this situation, the gap is generally filled with glass liquid 34 in advance and cooled and sealed. However, in actual production, due to the small gap and limited pre-filled glass liquid 34, the glass liquid 34 in the gap is likely to re-melt due to the heating of the feeding device 33 and the accumulation of glass liquid 34, resulting in overflow of the glass liquid 34. The present invention designs the load-bearing sleeve section 8 to form a first overflow prevention cavity 10 through a first expansion hole 9 on the end surface away from the insulation sleeve section 6. When glass liquid 34 overflows from the gap, the glass liquid 34 will enter the first overflow prevention cavity 10 and be cooled and solidified in conjunction with the cooling air duct, thereby preventing the glass liquid 34 from continuing to overflow. The first overflow prevention cavity 10 is larger than the volume of the gap. Even if part of the glass liquid 34 is melted by heat, it will not affect the overflow prevention effect.

[0054] See also Figure 2 , Figure 6 and Figure 7 A second expansion hole 17 coaxial with the inner hole of the insulation sleeve is provided on the end surface of the buffer sleeve section 7 away from the insulation sleeve section 6. The second expansion hole 17 forms an annular second overflow prevention cavity 18 outside the inner hole of the insulation sleeve.

[0055] In this way, a second anti-overflow cavity 18 is formed through the second expansion hole 17 on the end surface of the buffer sleeve section 7 away from the insulation sleeve section 6, thereby increasing the space for accommodating overflowing glass liquid 34. When the amount of overflow of glass liquid 34 is large and the first anti-overflow cavity 10 is filled, the glass liquid 34 can enter the second anti-overflow cavity 18 along the inner wall of the load-bearing sleeve section 8, and be cooled and solidified in conjunction with the cooling air duct, thereby preventing the glass liquid 34 from continuing to overflow, which is beneficial to improving the anti-overflow effect.

[0056] See also Figure 2 , Figure 6 and Figure 7 A plurality of exhaust holes 19 are circumferentially distributed on the end surface of the buffer sleeve section 7 close to the heat-insulating sleeve section 6 . The exhaust holes 19 are located outside the heat-insulating sleeve section 6 and axially connected to the second anti-overflow cavity 18 .

[0057] In this way, when the insulation sleeve is sleeved outside the feeding pipe 32 and sealed between the feeding section 31 and the feeding device 33, the exhaust hole 19 connects the inside of the insulation sleeve with the outside world, which can not only exhaust air when the glass liquid 34 overflows, so that the overflowing glass liquid 34 can smoothly enter the first anti-overflow chamber 10 and the second anti-overflow chamber 18 to avoid the insulation sleeve from exploding due to excessive internal air pressure, but also facilitate the overflowing glass liquid 34 to quickly cool and solidify in the first anti-overflow chamber 10 and the second anti-overflow chamber 18 to prevent excessive and continuous overflow; in this embodiment, a circle of connecting grooves 20 are provided on the end face of the buffer sleeve section 7 close to the insulation sleeve section 6, and the connecting grooves 20 are located on the outside of the insulation sleeve section 6, and the exhaust holes 19 are located at the bottom of the connecting grooves 20. The connecting grooves 20 connect the exhaust holes 19 and are lower than the upper end face of the buffer sleeve section 7, which is beneficial to improving the stability of exhaust and the safety of use.

[0058] In order to meet production needs and ensure the reliability of the anti-overflow effect, based on the actual situation of the ultra-thin microcrystalline glass calendering molding production process, the dimensional relationship in the insulation sleeve is set as follows: the axial dimension of the buffer sleeve section 7 is expressed as Q, and the axial dimension of the first anti-overflow cavity 10 is expressed as q, then Q=2×q should be satisfied; the inner diameter of the insulation sleeve section 6 is expressed as r, the minimum inner diameter of the buffer sleeve section 7 is expressed as Z1, and the minimum inner diameter of the load-bearing sleeve section 8 is expressed as Z2, Then r<Z1≤r+0.05cm and r<Z2≤r+0.05cm should be satisfied; the maximum inner diameter of the buffer sleeve section 7 is expressed as C1 and the outer diameter is expressed as X, then X×3 / 5<C1≤X×4 / 5 and Z1×7 / 3<X≤Z1×8 / 3 should be satisfied; the maximum inner diameter of the load-bearing sleeve section 8 is expressed as C2 and the outer diameter is expressed as K, then X×3 / 5<C2≤X×7 / 10 and X×8 / 3<K≤X×10 / 3 should be satisfied.

[0059] See also Fig.10 and Fig.11To facilitate further understanding of the present invention, this embodiment introduces a feeding structure obtained by installing the feeding and heat preservation device for glass production as follows: the feeding structure includes a feeding section 31 of a platinum channel, a feeding pipe 32 and a feeding device 33, the feeding pipe 32 is vertically arranged below the feeding section 31 and the upper end is connected to the discharge port of the feeding section 31, the feeding device 33 is located below the feeding pipe 32 and the feeding port of the feeding device 33 is connected to the lower end of the feeding pipe 32; the heat preservation sleeve is sleeved on Outside the feeding pipe 32, the end face of the insulation sleeve section 6 away from the load-bearing sleeve section 8 abuts against and seals with the plane where the discharge port is located, and the end face of the load-bearing sleeve section 8 away from the insulation sleeve section 6 abuts against and seals with the plane where the feed port is located; the distance between the plane where the discharge port is located and the plane where the feed port is located is denoted as h, and the axial dimension of the insulation sleeve is denoted as H. During implementation, H<h≤H+0.4cm should be satisfied to leave a margin for the thermal expansion of the insulation sleeve.

[0060] The above relationship is mainly based on the size of the feeding device 33 and the feeding pipe 32. The feeding insulation device is linked together from top to bottom, from the insulation sleeve section 6 to the buffer sleeve section 7 and then to the load-bearing section section 8. For example, the size formula of the insulation sleeve section 6 is designed based on the size of the feeding pipe 32. The inner diameter r of the insulation sleeve section 6 is based on the outer diameter of the feeding pipe 32, and a gap of 0.05 cm is reserved for matching. The matching effect and insulation effect of the insulation sleeve section 6 are better. R refers to r, which can make the insulation sleeve section 6 more convenient to process and assemble. Therefore, the size control of the inner diameter and outer diameter of the insulation sleeve section 6 comes from this. The size design of the buffer sleeve section 7 and the load-bearing section barrel section 8 is the same, so the various sections of the feeding insulation device can form a good fit and achieve the desired effect. Good coordination can effectively reduce the temperature loss of the feeding insulation device due to improper coordination during use, and can further increase the service life of the feeding insulation device, thereby increasing the insulation time of the feeding insulation device.

[0061] In order to verify the heat preservation effect of the present invention, a comparative experiment was conducted with the feed pipe being equipped with the feed heat preservation device for glass production and without the feed heat preservation device for glass production being equipped. The pulling amount and temperature of the glass liquid were respectively counted and a comparative table was formed as follows:

[0062]

[0063] Result analysis: From the comparison table of glass liquid pulling amount, it can be seen that under the same conditions, the glass liquid pulling amount with the insulation sleeve installed is higher than that without the insulation sleeve installed, and is about 0.5-0.7t / d higher than the set value. Therefore, the use of the insulation sleeve reduces the heat loss of the glass liquid in the feed pipe, which can effectively increase the glass liquid pulling amount, makes crystallization less likely to occur, and is more conducive to glass forming.

[0064]

[0065] Result analysis: It can be seen from the temperature comparison table that, under the same conditions, the temperature of the feed pipe with an insulation sleeve installed is higher than that of the feed pipe without an insulation sleeve, and is about 5-8°C higher. The temperature of the glass liquid with an insulation sleeve installed is higher than that of the glass liquid without an insulation sleeve, and is about 6-10°C higher. Therefore, the installation of an insulation sleeve can provide better insulation effect for the feed pipe and the glass liquid therein, and can reduce the cooling amplitude of the glass liquid after it flows out of the feeding section. The glass liquid maintains a higher temperature when entering the feeding device, which is beneficial for the feeding device to output the glass liquid in a uniform strip shape, which is more conducive to glass forming.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the technical solution. Those skilled in the art should understand that those modifications or equivalent substitutions of the technical solution of the present invention that do not depart from the purpose and scope of the technical solution should be included in the scope of the claims of the present invention.

Claims

1. A feeding and heat preservation device for glass production, characterized in that: The thermal insulation sleeve comprises a thermal insulation sleeve which is composed of an axially split and detachable left half sleeve and a right half sleeve which are relatively spliced ​​together. A plurality of baffles are distributed on the outer circumference of the thermal insulation sleeve. The baffles comprise a baffle and an extension portion. The extension portion is connected to the outer side surface of the thermal insulation sleeve. The end portion of the baffle is arranged at an end of the extension portion which is away from the outer side surface of the thermal insulation sleeve. The length direction of the baffle corresponds to the axial direction of the thermal insulation sleeve and a spacing is arranged with the outer side surface of the thermal insulation sleeve. The spacing is used to make way for thermal insulation cotton laid on the outer circumference of the thermal insulation sleeve so as to fix the thermal insulation cotton laid on the outside of the thermal insulation sleeve through the baffle.

2. A feeding and heat preservation device for glass production according to claim 1, characterized in that: The insulation sleeve is divided into an insulation sleeve section, a buffer sleeve section and a load-bearing sleeve section with increasing outer diameters in the axial direction. The buffer sleeve section is located between the insulation sleeve section and the load-bearing sleeve section, and the axial dimension of the insulation sleeve section is larger than the sum of the axial dimensions of the buffer sleeve section and the load-bearing sleeve section. The gear lever is located outside the insulation sleeve section, and a circle of receiving grooves for filling insulation cotton is provided on the end surface of the insulation sleeve section away from the load-bearing sleeve section.

3. A feeding and heat preservation device for glass production according to claim 2, characterized in that: The axial dimension ratio of the heat-insulating sleeve section, the buffer sleeve section and the load-bearing sleeve section is 4-5:1-1.5:2-2.

5.

4. A feeding and heat preservation device for glass production according to claim 2, characterized in that: The insulation sleeve section, the buffer sleeve section and the load-bearing sleeve section are independent of each other and detachably connected. The insulation sleeve section is composed of an axially split left half insulation section and a right half insulation section, the buffer sleeve section is composed of an axially split left half buffer section and a right half buffer section, and the load-bearing sleeve section is composed of an axially split left half load-bearing section and a right half load-bearing section; the left half insulation section, the left half buffer section and the left half load-bearing section are axially connected to form the left half sleeve, and the right half insulation section, the right half buffer section and the right half load-bearing section are axially connected to form the right half sleeve.

5. The feeding and heat preservation device for glass production according to claim 2, characterized in that: A first expansion hole coaxial with the inner hole of the insulation sleeve is arranged on the end surface of the load-bearing sleeve section away from the insulation sleeve section. The first expansion hole forms a first annular overflow prevention cavity outside the inner hole of the insulation sleeve.

6. A feeding and heat preservation device for glass production according to claim 5, characterized in that: A second expansion hole coaxial with the inner hole of the insulation sleeve is provided on the end surface of the buffer sleeve section away from the insulation sleeve section. The second expansion hole forms an annular second overflow prevention cavity outside the inner hole of the insulation sleeve.

7. The material supply and heat preservation device for glass production according to claim 2, characterized in that: The axial dimension of the buffer sleeve section is expressed as Q, and the axial dimension of the first anti-overflow cavity is expressed as q, then Q=2×q should be satisfied.

8. The material supply and heat preservation device for glass production according to claim 2, characterized in that: The inner diameter of the insulation sleeve section is represented by r, the minimum inner diameter of the buffer sleeve section is represented by Z1, and the minimum inner diameter of the load-bearing sleeve section is represented by Z2, then r<Z1≤r+0.05cm and r<Z2≤r+0.05cm should be satisfied.

9. A feeding and heat preservation device for glass production according to claim 8, characterized in that: The maximum inner diameter of the buffer sleeve section is represented by C1 and the outer diameter is represented by X, then X×3 / 5<C1≤X×4 / 5 and Z1×7 / 3<X≤Z1×8 / 3 should be satisfied.

10. A feeding and heat preservation device for glass production according to claim 9, characterized in that: The maximum inner diameter of the load-bearing sleeve section is denoted as C2 and the outer diameter is denoted as K, then X×3 / 5<C2≤X×7 / 10 and X×8 / 3<K≤X×10 / 3 should be satisfied.

11. A feeding and heat preservation device for glass production according to claim 6, characterized in that: A plurality of exhaust holes are circumferentially distributed on the end surface of the buffer sleeve section close to the heat-insulating sleeve section. The exhaust holes are located outside the heat-insulating sleeve section and axially connected to the second anti-overflow cavity.

12. A feeding and heat preservation device for glass production according to claim 4, characterized in that: The circumferential end surfaces of the left half insulation section, the left half buffer section and the left half load-bearing section are all provided with splicing grooves, and the circumferential end surfaces of the right half insulation section, the right half buffer section and the right half load-bearing section are all provided with corresponding splicing blocks, which are located in the corresponding splicing grooves to achieve relative splicing of the left half sleeve and the right half sleeve.

13. A feeding and heat preservation device for glass production according to claim 12, characterized in that: There are multiple positioning holes distributed circumferentially on the end surfaces of the insulation sleeve section and the buffer sleeve section facing the load-bearing sleeve section, and there are multiple positioning pins distributed circumferentially on the end surfaces of the buffer sleeve section and the load-bearing sleeve section facing the insulation sleeve section. The positioning pins on the buffer sleeve section are inserted one-to-one into the positioning holes on the insulation sleeve section, and the positioning pins on the load-bearing sleeve section are inserted one-to-one into the positioning holes on the buffer sleeve section, so as to realize the detachable connection of the insulation sleeve section, the buffer sleeve section and the load-bearing sleeve section.

14. A feeding and heat preservation device for glass production according to claim 13, characterized in that: In the radial direction, the splicing groove and the splicing block on the load-bearing sleeve section are located outside the buffer sleeve section. A first limiting hole is opened on the end face of the load-bearing sleeve section close to the heat-insulating sleeve section. The first limiting hole is axially connected to the splicing groove on the load-bearing sleeve section. A second limiting hole coaxial with the first limiting hole is axially penetrated on the splicing block of the load-bearing sleeve section. The load-bearing sleeve section has a limiting pin movably inserted in the first limiting hole and the second limiting hole.

15. A feeding structure for glass production, characterized in that: A feeding section, a feeding pipe, a feeding device and a feeding and heat-insulating device for glass production comprising a platinum channel, wherein the feeding pipe is vertically arranged below the feeding section and the upper end is connected to the discharge port of the feeding section, the feeding device is located below the feeding pipe and the feed port of the feeding device is connected to the lower end of the feeding pipe; the insulation sleeve is sleeved outside the feeding pipe, the end surface of the insulation sleeve section away from the load-bearing sleeve section abuts against and seals the plane where the discharge port is located, the end surface of the load-bearing sleeve section away from the insulation sleeve section abuts against and seals the plane where the feed port is located, the distance between the plane where the discharge port is located and the plane where the feed port is located is denoted as h, and the axial dimension of the insulation sleeve is denoted as H, then H<h≤H+0.4cm should be satisfied.

Images