Rear plug for large-specification glass pouring forming

Abstract

The utility model provides a rear plug for large-specification glass pouring forming. The rear plug comprises a plurality of cooling grooves, a plurality of groups of cooling holes, a plurality of liquid outlet pipes, a plurality of temperature measuring devices and a plurality of sealing caps. According to temperature distribution of molten glass in an inner cavity of the rear plug, a proper number of cooling grooves are formed in proper positions in the inner cavity of the rear plug in the length direction, and each cooling groove is communicated with a plurality of cooling holes which are distributed at equal intervals in the length direction of the rear plug; and a plurality of liquid outlet pipes are arranged in the cooling holes at proper positions, so that each cooling tank, the liquid inlet pipe communicated with the cooling tank and the plurality of liquid outlet pipes form an independent cooling system. Therefore, the number of the cooling systems arranged at the high-temperature position of the molten glass in the rear plug is large, the number of the cooling systems arranged at the low-temperature position of the molten glass in the rear plug is small, the temperature of the molten glass at each position in the inner cavity of the rear plug is kept consistent, and the processing and forming quality of the molten glass is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of optical glass molding, in particular to a back plug used for casting and molding of large-size glass. Background Art

[0002] The optical glass industry is developing faster and faster, and new glass products are emerging one after another. At the same time, the market has more and more requirements for different specifications of glass, especially large-size K9 optical and radiation-proof glass. At present, some optical glasses have uneven cooling during the one-time molding process due to high temperature and low viscosity, especially in the rear blocking part, it is not easy to achieve uniform and controllable cooling effect on the glass liquid, so the produced glass has stripes or sticking to the mold, which affects the glass quality.

[0003] During the molding process of large pieces of optical glass, high-temperature molten glass flows into the back plug from the middle of the back plug, so the temperature of the middle of the back plug increases accordingly. As the molten glass flows to both sides, its temperature also decreases. The temperature close to the two sides of the back plug will decrease accordingly, resulting in a larger temperature difference between the two sides and the center of the back plug, making the produced glass prone to molding stripes due to uneven temperature. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a back plug for casting and molding large-sized glass. According to the temperature distribution of the molten glass in the inner cavity of the back plug and the specifications and dimensions of the produced glass products and the processing requirements, a suitable number of multiple groups of cooling systems consisting of liquid inlet pipes, cooling troughs and liquid outlet pipes are arranged at suitable positions in the inner cavity of the back plug, and a cooling medium with the best cooling effect is selected to cool the molten glass in the back plug, so that the temperature of the molten glass in the inner cavity of the back plug remains consistent. The temperature of the molten glass at various locations can be monitored in real time, the cooling medium can be controlled and adjusted in time, and the glass processing effect can be improved.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A back plug for casting and molding large-size glass, wherein a glass liquid inlet is opened at the top center of the back plug, and the glass liquid to be molded flows into the inner cavity of the back plug from the glass liquid inlet, and the back plug comprises:

[0007] A plurality of cooling grooves are provided in the inner cavity of the rear plug along the length direction of the rear plug, and the specific opening positions and numbers thereof are adapted to the temperature distribution of the glass liquid in the inner cavity of the rear plug, and one end of each cooling groove is connected to a liquid inlet pipe for introducing a cooling medium to cool the glass liquid in the inner cavity of the rear plug;

[0008] A plurality of groups of cooling holes, each cooling slot is connected to a group of cooling holes, and each group of cooling holes includes a plurality of cooling holes arranged at equal intervals along the length direction of the rear plug;

[0009] A plurality of liquid outlet pipes, some of the cooling holes are equipped with liquid outlet pipes, which are used to form a cooling circuit with the corresponding cooling grooves to discharge the cooling medium, and the position distribution of the liquid outlet pipes is adapted to the temperature distribution of the glass liquid in the rear plug inner cavity;

[0010] A number of temperature measuring devices, wherein some cooling holes without liquid outlet pipes are equipped with temperature measuring devices, for blocking the corresponding cooling holes and monitoring the temperature of the glass liquid in the rear plugging cavity at the position;

[0011] Several sealing caps are installed in all cooling holes that are not equipped with liquid outlet pipes and temperature measuring devices, and are used to block the corresponding cooling holes.

[0012] Furthermore, the liquid inlet pipe and the liquid outlet pipe are both threaded pipes made of copper or heat-resistant steel pipes.

[0013] Furthermore, the opening diameter of the cooling groove is larger than the opening diameter of the cooling hole, and the diameter of the liquid outlet pipe is matched with the opening diameter of the cooling hole.

[0014] Furthermore, the opening diameter of the cooling groove is 20-25 mm, and the opening diameter of the cooling hole is 8-12 mm.

[0015] Furthermore, a valve switch and a flow meter are provided on the liquid inlet pipe.

[0016] Furthermore, the cross-section of the rear plug is trapezoidal, the length of the rear plug is 600mm~1200mm, the height is 80-200mm, the width of the upper bottom of the trapezoidal cross-section is 50~150mm, and the width of the lower bottom is 100~300mm.

[0017] Furthermore, the temperature measuring device is an S-type thermocouple, the depth of the S-type thermocouple is 50mm-150mm, the temperature measurement accuracy is ±0.6°C, and the diameter of the thermocouple wire is 0.3-1mm.

[0018] Furthermore, the material of the S-type thermocouple is platinum and platinum-rhodium alloy.

[0019] Furthermore, the rear plug is made of heat-resistant cast iron.

[0020] Furthermore, one end of the liquid inlet pipe is connected to the cooling tank, and the other end is sealed and connected to a high temperature resistant hose, and the hose is a stainless steel metal corrugated hose.

[0021] The beneficial effects of the utility model are:

[0022] 1. The utility model opens a suitable number of cooling grooves at suitable positions in the rear plug inner cavity along the length direction of the rear plug according to the temperature distribution of the glass liquid in the rear plug inner cavity, and the opening length and aperture size of the cooling groove can be designed according to the temperature distribution of the glass liquid in the rear plug inner cavity and the specifications and dimensions of the glass product. Each cooling groove is connected with a number of cooling holes arranged at equal intervals along the length direction of the rear plug, and according to the temperature distribution of the glass liquid in the rear plug inner cavity, the viscosity of the glass liquid and the processing requirements, a number of liquid outlet pipes are selected to be installed in the cooling holes at suitable positions, so that each cooling groove and the liquid inlet pipe and a number of liquid outlet pipes connected thereto form an independent cooling system together. Therefore, the number of cooling systems set at the places where the temperature of the glass liquid in the rear plug inner cavity is high is relatively large, and the number of cooling systems set at the places where the temperature of the glass liquid is low is relatively small, so that the cooling medium (such as water, compressed air) runs according to the designed effect and route to realize uniform cooling of the glass liquid in the rear plug inner cavity, so that the temperature of the glass liquid at various positions in the rear plug inner cavity is kept consistent, and the quality of the processing and molding of the glass liquid is improved.

[0023] 2. By setting up multiple independent cooling systems, the cooling medium entering each cooling system can be controlled separately to achieve the purpose of separate temperature control and achieve better cooling effect.

[0024] 3. By installing several temperature measuring devices in the cooling holes, the temperature of the glass liquid at different positions in the back plug cavity can be monitored in real time, which is convenient for monitoring the temperature of the glass liquid during the forming process, and timely adjusting the flow of the cooling medium to improve the cooling efficiency and effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the overall structure of the rear plug used for casting and molding large-sized glass in the utility model;

[0026] Figure 2 It is a schematic diagram of the positions of the cooling grooves and cooling holes of the utility model;

[0027] Figure 3 It is a schematic diagram of the connection between the cooling groove and the cooling hole of the utility model.

[0028] Reference numerals:

[0029] 1-rear plug, 2-glass liquid inlet, 3-cooling trough, 4-liquid inlet pipe, 5-cooling hole, 6-liquid outlet pipe, 7-S type thermocouple, 8-sealing cap. DETAILED DESCRIPTION

[0030] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0031] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] like Figures 1 to 3 As shown, the utility model provides a back plug for casting and molding large-sized glass, wherein a glass liquid inlet 2 is provided at the top center of the back plug 1, and the glass liquid to be molded flows into the inner cavity of the back plug 1 from the glass liquid inlet 2, and the back plug 1 comprises:

[0034] A plurality of cooling grooves 3 are provided in the inner cavity of the rear plug 1 along the length direction of the rear plug 1, and the specific opening positions and numbers thereof are adapted to the temperature distribution of the glass liquid in the inner cavity of the rear plug 1, and one end of each cooling groove 3 is connected to a liquid inlet pipe 4 for introducing a cooling medium to cool the glass liquid in the inner cavity of the rear plug 1;

[0035] A plurality of groups of cooling holes 5, each cooling slot 3 is connected to a group of cooling holes 5, and each group of cooling holes 5 includes a plurality of cooling holes 5 arranged at equal intervals along the length direction of the rear plug 1;

[0036] A plurality of liquid outlet pipes 6, some of the cooling holes 5 are equipped with liquid outlet pipes 6, which are used to form a cooling circuit with the corresponding cooling grooves 3 to discharge the cooling medium, and the position distribution of the liquid outlet pipes 6 is adapted to the temperature distribution of the glass liquid in the inner cavity of the rear plug 1;

[0037] A plurality of temperature measuring devices, wherein a temperature measuring device is installed in some cooling holes 5 where no liquid outlet pipe 6 is installed, for blocking the corresponding cooling holes 5 and monitoring the temperature of the glass liquid in the inner cavity of the rear plug 1 at the position;

[0038] A plurality of sealing caps 8 are installed in all cooling holes 5 that are not equipped with a liquid outlet pipe 6 and a temperature measuring device, and are used to block the corresponding cooling holes 5.

[0039] like Figure 2 and Figure 3 As shown, when the high-temperature glass liquid flows out from the platinum discharge nozzle and flows into the inner cavity of the rear plug 1 through the glass liquid inlet 2 opened at the top center of the rear plug 1, the temperature of the glass liquid at the glass liquid inlet 2 is as high as 1200-1350°C. The glass liquid will lose temperature in the process of diffusing to the surroundings in the inner cavity of the rear plug 1, resulting in a higher temperature at the center of the inner cavity of the rear plug 1 and a lower temperature around. According to the temperature distribution of the glass liquid in the inner cavity of the rear plug 1, the utility model opens a suitable number of cooling grooves 3 at a suitable position in the inner cavity of the rear plug 1 along the length direction of the rear plug 1, and can design the opening length and aperture size of the cooling groove 3 according to the temperature distribution of the glass liquid in the inner cavity of the rear plug and the specifications of the glass product. Each cooling groove 3 is connected with a plurality of cooling holes 5 arranged at equal intervals along the length direction of the rear plug 1, and according to the temperature distribution of the glass liquid in the inner cavity of the rear plug 1, the viscosity of the glass liquid and the processing requirements, select to install a plurality of liquid outlet pipes 6 in the cooling holes 5 at a suitable position, so that each cooling groove 3 and the liquid inlet pipe 4 and a plurality of liquid outlet pipes 6 connected thereto form an independent cooling system. Therefore, a larger number of cooling systems are set up in places where the temperature of the glass liquid is high in the inner cavity of the rear plug 1, and a smaller number of cooling systems are set up in places where the temperature of the glass liquid is low, so that the cooling medium (such as water, compressed air) can run according to the designed effect and route to achieve uniform cooling of the glass liquid in the inner cavity of the rear plug 1, so that the temperature of the glass liquid at various positions in the inner cavity of the rear plug is kept consistent, thereby improving the processing and molding quality of the glass liquid.

[0040] Each cooling slot 3 on the rear plug 1 provided by the utility model is independently arranged. By arranging a plurality of independent cooling slots 3, multiple groups of cooling systems can independently control the cooling medium introduced to achieve the purpose of separately controlling the temperature. Different cooling media can be selected and used according to the temperature distribution of the glass liquid in the inner cavity of the rear plug 1 and the specific viscosity of the formed glass to achieve a better cooling effect. For example, air cooling is used in the cooling slot 3 located at the upper part of the rear plug 1, water cooling is used in the cooling slot 3 located at the lower part of the rear plug 1, or one of the cooling slots 3 is sealed and does not need cooling. The cooling method of the utility model is flexible and changeable, so as to adjust and solve the problems arising from glass forming, and multiple methods can be used to select the best corresponding method for different glass products.

[0041] In the present invention, a temperature measuring device is installed in some cooling holes 5 where the liquid outlet pipe 6 is not installed, which is used to block the corresponding cooling holes 5 and monitor the temperature of the glass liquid in the inner cavity of the rear plug 1 at that position, so as to facilitate the monitoring of the temperature during the glass liquid forming process and timely adjust the flow of the cooling medium to improve the cooling efficiency and effect. A sealing cap 8 is installed in all cooling holes 5 where the liquid outlet pipe 6 and the temperature measuring device are not installed, so as to seal the cooling holes 5 in the rear plug 1 where cooling is not required, and prevent the cooling medium from flowing out and affecting the uniformity of the glass liquid temperature in the inner cavity of the rear plug.

[0042] In some embodiments, the liquid inlet pipe 4 and the liquid outlet pipe 6 are both threaded pipes made of copper or heat-resistant steel pipes, which have good thermal conductivity and can help cool the glass liquid. One end of the liquid inlet pipe 4 is connected to the cooling tank 3, and the other end is sealed with a high-temperature resistant hose. The hose is a stainless steel corrugated hose, which is used to connect an external cooling medium source and introduce the cooling medium into the cooling tank 3 through the liquid inlet pipe 4. The liquid inlet pipe 4 is provided with a valve switch and a flow meter, and the flow meter can identify the flow rate of the cooling medium flowing into the cooling tank 3. The flow rate of the cooling medium can be adjusted by adjusting the valve switch, so that the cooling effect of the glass liquid can be controlled and the cooling effect can be improved.

[0043] In some embodiments, the cooling groove 3 is a circular cooling groove, the cooling hole 5 is a circular cooling hole, and the opening diameter of the cooling groove 3 is larger than the opening diameter of the cooling hole 5, and the diameter of the liquid outlet pipe 6 is adapted to the opening diameter of the cooling hole 5. Specifically, the opening diameter of the cooling groove 3 is 20-25 mm, and the opening diameter of the cooling hole 5 is 8-12 mm. When in use, the cooling groove 3 and the cooling hole 5 with appropriate opening diameters can be selected according to the process requirements of glass production to achieve the best cooling effect.

[0044] In some embodiments, the cross section of the rear plug 1 is a trapezoid, the length of the rear plug 1 is 600mm-1200mm, the height is 80-200mm, the width of the upper bottom of the trapezoidal cross section is 50-150mm, and the width of the lower bottom is 100-300mm. The cooling groove 3 is drilled from one side of the rear plug 1 along the length direction of the rear plug 1, but cannot penetrate the rear plug 1. In actual design, the length and diameter of the opening can be designed according to the specifications of the glass product.

[0045] As a preferred embodiment, the material of the rear plug 1 is heat-resistant cast iron, which has the advantages of high temperature resistance and oxidation resistance.

[0046] In some embodiments, the temperature measuring device is an S-type thermocouple 7, and the S-type thermocouple 7 is provided with multiple groups and is symmetrically distributed front and back along the length direction of the rear plug 1. The depth of the S-type thermocouple 7 is 50mm-150mm, the temperature measurement accuracy is ±0.6°C, and the diameter of the thermocouple wire is 0.3-1mm. By arranging multiple S-type thermocouples 7 at different positions on the rear plug 1, on the one hand, the cooling medium in the cooling tank 3 can be blocked to prevent the cooling medium from flowing out. More importantly, the temperature of the glass liquid at different positions in the rear plug 1 can also be monitored, and the flowmeter on the liquid inlet pipe 4 is adjusted according to the temperature data read by the S-type thermocouple 7, the flow rate of the cooling medium is adjusted, and the molding temperature of each section of the glass liquid is accurately controlled, so that the cooling is more uniform and controllable, and the cooling efficiency and glass molding effect are improved. The temperature measuring device is an S-type thermocouple 7, which can measure higher temperatures than K-type thermocouples, and has higher accuracy, and can achieve better measurement effects.

[0047] As a preferred embodiment, the material of the S-type thermocouple 7 is platinum and platinum-rhodium alloy.

[0048] As a preferred embodiment, the sealing cap is made of copper, which has good thermal conductivity and can improve heat exchange efficiency.

[0049] The above implementation modes are only used to illustrate the present invention, but not to limit the present invention. Although the present invention is described in detail with reference to the embodiments, a person skilled in the art should understand that various combinations, modifications or equivalent substitutions of the technical solutions of the present invention do not deviate from the spirit and scope of the technical solutions of the present invention, and should be included in the scope of the claims of the present invention.

Claims

1. A back plug for casting large-size glass, wherein a glass liquid inlet is provided at the top center of the back plug, and the glass liquid to be formed flows into the inner cavity of the back plug from the glass liquid inlet, characterized in that: The back plugging includes: A plurality of cooling grooves are provided in the inner cavity of the rear plug along the length direction of the rear plug, and the specific opening positions and numbers thereof are adapted to the temperature distribution of the glass liquid in the inner cavity of the rear plug, and one end of each cooling groove is connected to a liquid inlet pipe for introducing a cooling medium to cool the glass liquid in the inner cavity of the rear plug; A plurality of groups of cooling holes, each cooling slot is connected to a group of cooling holes, and each group of cooling holes includes a plurality of cooling holes arranged at equal intervals along the length direction of the rear plug; A plurality of liquid outlet pipes, some of the cooling holes are equipped with liquid outlet pipes, which are used to form a cooling circuit with the corresponding cooling grooves to discharge the cooling medium, and the position distribution of the liquid outlet pipes is adapted to the temperature distribution of the glass liquid in the rear plug inner cavity; A number of temperature measuring devices, wherein some cooling holes without liquid outlet pipes are equipped with temperature measuring devices, for blocking the corresponding cooling holes and monitoring the temperature of the glass liquid in the rear plugging cavity at the position; Several sealing caps are installed in all cooling holes that are not equipped with liquid outlet pipes and temperature measuring devices, and are used to block the corresponding cooling holes.

2. The back plug for large-size glass casting according to claim 1 is characterized in that: The liquid inlet pipe and the liquid outlet pipe are both threaded pipes made of copper or heat-resistant steel pipe.

3. The back plug for large-size glass casting according to claim 2 is characterized in that: The opening diameter of the cooling groove is larger than the opening diameter of the cooling hole, and the diameter of the liquid outlet pipe is matched with the opening diameter of the cooling hole.

4. The back plug for large-size glass casting and molding according to claim 3 is characterized in that: The opening diameter of the cooling groove is 20-25 mm, and the opening diameter of the cooling hole is 8-12 mm.

5. The back plug for large-size glass casting and molding according to claim 2 is characterized in that: The liquid inlet pipe is provided with a valve switch and a flow meter.

6. The back plug for large-size glass casting according to claim 1 is characterized in that: The cross section of the rear plug is a trapezoid, the length of the rear plug is 600mm~1200mm, the height is 80-200mm, the width of the upper bottom of the trapezoidal cross section is 50~150mm, and the width of the lower bottom is 100~300mm.

7. The back plug for large-size glass casting according to claim 1 is characterized in that: The temperature measuring device is an S-type thermocouple, the depth of the S-type thermocouple is 50mm-150mm, the temperature measuring accuracy is ±0.6°C, and the diameter of the thermocouple wire is 0.3-1mm.

8. The back plug for large-size glass casting according to claim 7, characterized in that: The material of the S-type thermocouple is platinum and platinum-rhodium alloy.

9. The back plug for large-size glass casting according to claim 1 is characterized in that: The material of the rear plug is heat-resistant cast iron.

10. The back plug for large-size glass casting and molding according to claim 9, characterized in that: One end of the liquid inlet pipe is connected to the cooling tank, and the other end is sealed and connected to a high-temperature resistant hose, which is a stainless steel metal corrugated hose.

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