Glass liquid blocking device and blocking method thereof

Abstract

The present invention provides a blocking device and a blocking method for quickly blocking the flow of molten glass during the glass production process. The molten glass blocking device includes an indirect cooling ring, a flow blocking device, and a cut-off device. The indirect cooling ring is arranged above the pipe mouth and surrounds the pipe surface; the flow blocking device is arranged at the pipe mouth, and the leakage hole of the flow blocking device is arranged at the center of the pipe mouth, and the size of the leakage hole is smaller than the size of the pipe mouth; the cut-off device is arranged below the flow blocking device, and the size of the sealing plate of the cut-off device is larger than the size of the leakage hole. The present invention utilizes the organic coordination of the indirect cooling ring, the flow blocking device, and the cut-off device to form a method of gradually increasing the flow resistance of the molten glass to achieve step-by-step blocking of the pipeline, solving the technical problem that the pipeline is difficult to quickly block during short-term high-flow production.

Description

Technical Field

[0001] The present invention relates to a device in a glass production process, in particular to a rapid blocking device for blocking molten glass from continuing to flow in a pipeline at the end of a high-temperature production process on a glass production line, and a blocking method for rapidly blocking the flow of molten glass at the end of a high-flow process by utilizing the blocking device. Background Art

[0002] In the production of glass blocks, glass melting and glass forming are important thermal processes. In the glass melting process, bubbles and stones inside the glass are refined through the melting system, and after a homogenization process, the internal striations of the glass are significantly improved, thereby melting glass with intrinsic quality that meets customer needs. In the glass forming process, the molten glass liquid needs to be transferred through a controlled pipeline to a forming mold, where the glass block is then formed into the desired shape. The glass block is then cooled to form a glass blank product.

[0003] In the above production process, when the production process is finished, the pipe for conveying molten glass is still in a high temperature state. In order to block the flow of molten glass in the pipe, the following methods are usually used: Figure 1 In the manner shown, by lowering the external temperature of the pipe 1 or reducing the output power of the pipe, the glass liquid 6 in the pipe 1 is quickly cooled and thus loses its fluidity, thereby achieving the purpose of blocking the flow of the glass liquid in the pipe. In addition, in order to improve the efficiency of blocking the flow of the glass liquid, reduce the operation time and reduce the amount of glass liquid loss, compressed air, nitrogen or other gases can be passed through the cooling air duct 103 to accelerate the heat dissipation efficiency of the glass liquid 6 flowing out of the pipe 1, such as Figure 1 As shown, the glass liquid 6 at the pipe mouth is quickly cooled and the viscosity of the glass liquid 6 is increased, so that the glass liquid 6 flowing out near the pipe mouth quickly loses fluidity, and the flow of the glass liquid in the pipeline 1 is blocked.

[0004] As demand for glass used in optoelectronics and specialized applications shifts, the demand for large-diameter products with diameters of 300mm and above has increased significantly, becoming a key material for research in certain specialized fields. In particular, demand for ultra-large-diameter glass blocks measuring 1m and above has surged. To ensure quality, the molding time of each block of glass must be controlled to ensure that critical technical specifications such as internal bubbles, streaks, stress, and optical uniformity are met. The longer the molding time for a single block of glass, the more likely it is to experience defects due to temperature gradients causing uniformity or insufficient high-temperature resistance of materials in contact with the glass, thus reducing product quality. To address the molding time issue, flow optimization is required in the pipeline design between the glass melting and molding processes to increase the glass flow rate within the pipeline cross-section. However, this increased flow rate results in a larger pipeline diameter and a lower high-temperature viscosity of the glass. This makes it difficult to block the glass at the end of the production process, making it impossible to efficiently seal the pipeline and block the flow of glass. Therefore, solving the problem of sealing large-flow and large-diameter pipes is particularly urgent for realizing the molding of large-diameter and ultra-large-diameter block products. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a blocking device for quickly blocking the glass liquid from continuing to flow in a pipeline at the end of the production process in a large-diameter glass production process.

[0006] The present invention also provides a method for quickly blocking the flow of molten glass in a pipeline.

[0007] The technical solution adopted by the present invention to solve the technical problem is: a glass liquid blocking device, including an indirect cooling ring, a flow blocking device and a cut-off device, the indirect cooling ring is arranged above the pipe mouth and surrounds the pipe surface; the flow blocking device is arranged at the pipe mouth, and the leakage hole of the flow blocking device is arranged at the center of the pipe mouth, and the size of the leakage hole is smaller than the size of the pipe mouth; the cut-off device is arranged below the flow blocking device, and the size of the sealing plate of the cut-off device is larger than the size of the leakage hole.

[0008] Furthermore, the ring body is provided with a cavity within, an inlet connected to the cavity, and a plurality of annular outlets are evenly distributed inside the ring body. The inner diameter of the ring body is 2-5 times the outer diameter of the pipe. The cooling medium introduced into the indirect cooling ring has a pressure of 0.3 MPa or above, preferably 0.3-0.7 MPa. The cooling medium is compressed gas with a temperature below 35°C.

[0009] Furthermore, the flow blocking device includes a first support, a first support rod, a cooling plate, a leakage hole, a first cooling medium inlet and a first cooling medium outlet, a cavity is provided inside the cooling plate, and the first cooling medium inlet and the first cooling medium outlet are provided on the cooling plate; a leakage hole is provided at the center position of the cooling plate; the cooling plate is connected to the first support rod, and the first support rod is provided on the first support.

[0010] Furthermore, the leakage hole consists of three parts: a leakage hole inlet, a middle section of the leakage hole and a leakage hole outlet. The cross-sectional area of ​​the leakage hole inlet is less than or equal to the cross-sectional area of ​​the pipe orifice, and the cross-sectional area of ​​the leakage hole inlet is greater than or equal to the cross-sectional area of ​​the leakage hole outlet. The minimum cross-sectional area of ​​the leakage hole is greater than or equal to 0.5 times the cross-sectional area of ​​the pipe orifice.

[0011] Furthermore, the flow blocking device also includes an auxiliary support and a limit block, the auxiliary support is arranged below the first support rod; the limit block is arranged on the upper surface of the cooling plate, and the height of the limit block is greater than or equal to 10 mm, and the limit block is 10-50 mm away from the outer surface of the pipe.

[0012] Furthermore, the cooling plate and leakage hole of the flow-blocking device are divided into two parts from the center, and the two parts are mirror-symmetrical structures. The cooling circuits in the cooling plates of the two parts are independent structures, and are respectively provided with a first cooling medium inlet and a first cooling medium outlet.

[0013] Furthermore, the height h of the leakage hole is greater than or equal to 5 mm, and preferably the height h is less than or equal to the outer diameter of the pipe.

[0014] Furthermore, the central axis of the leakage hole coincides with the central axis of the pipeline, and the flow blocking device is arranged between the cutting device and the pipeline orifice.

[0015] Furthermore, the cutting device includes a second support, a second support rod, a second cooling medium inlet, a second cooling medium outlet and a sealing plate, a cavity is provided inside the sealing plate, and the second cooling medium inlet and the second cooling medium outlet are provided on the sealing plate; the sealing plate is connected to the second support rod, and the second support rod is provided on the second support; the sealing plate is provided directly below the leakage hole and is close to the lower surface of the cooling plate.

[0016] A glass liquid blocking method, comprising the following steps:

[0017] 1) After the glass block production process is completed, the ambient temperature and heat of the pipeline are quickly reduced. When the glass liquid flows through the pipeline, the temperature of the glass liquid near the wall of the pipeline is indirectly reduced through heat exchange, thereby increasing the glass viscosity, increasing the flow pressure loss of the glass liquid, and reducing the fluidity of the glass liquid in the pipeline;

[0018] 2) Place the indirect cooling ring above the pipe orifice, and introduce the cooling medium into the indirect cooling ring. The cooling medium is evenly distributed to the pipe orifice of the pipe through the annular outlet on the indirect cooling ring. The cooling medium flows at a high speed to quickly remove the heat from the surface of the glass liquid, reduce the flow speed and surface temperature of the glass liquid, and increase its flow resistance;

[0019] 3) Adjust the first support of the flow-blocking device and adjust the height of the upper surface of the cooling plate to below the pipe orifice. Then, quickly move the cooling plate directly below the pipe. The pipe, cooling plate, and leakage hole cooperate to rapidly reduce the flow cross-section of the molten glass. The area on the upper surface of the cooling plate that contacts the molten glass can achieve rapid cooling of the molten glass flowing out of the pipe. At the same time, due to the diameter difference between the leakage hole and the pipe, the cross-sectional area of ​​the molten glass after flowing through the leakage hole is greatly reduced, thereby increasing the flow resistance and causing a decrease in the glass flow rate.

[0020] 4) Adjust the position of the second support and sealing plate of the cut-off device, fit the sealing plate to the lower surface of the flow-blocking device, and quickly cut off the glass liquid flowing out of the leakage hole. The glass liquid above the sealing plate is quickly cooled by the cooling circuit in the sealing plate to achieve the blocking of the glass liquid in the pipeline.

[0021] Furthermore, rapid blocking of a large flow rate of molten glass above 50 L / h can be achieved, preferably the flow rate of the molten glass is 100-2000 L / h, and most preferably the flow rate of the molten glass is 300-1500 L / h.

[0022] Furthermore, high-efficiency blocking can be achieved during the flow of the molten glass in the pipeline when the viscosity is in the range of 10-5000 poise, and the preferred range of the molten glass viscosity is 10-2000 poise.

[0023] Furthermore, high-efficiency blocking can be achieved when the temperature of the molten glass in the pipeline is 1200-1500°C at the end of the glass block production process, and preferably the temperature range of the molten glass is 1250-1425°C.

[0024] Furthermore, the diameter of the pipe is 20-100 mm, preferably the diameter of the pipe is 30-90 mm.

[0025] The beneficial effects of the present invention are as follows: the present invention utilizes the organic combination of an indirect cooling ring, a flow blocking device, and a shut-off device to form a method of gradually increasing the flow resistance of the glass liquid to achieve step-by-step blocking of the pipeline, thereby solving the technical problem that the pipeline is difficult to block quickly during short-term high-flow production; the technical solution of step-by-step blocking improves the mechanical fatigue problem of the pipe wall material caused by the pressure change of the glass liquid on the pipe wall caused by the rapid change of the glass flow rate during the blocking process, thereby improving the service life of the entire pipeline; by improving the cooling method of the pipe nozzle, the problem of rapid spread of cracks caused by aging and deterioration of the pipe nozzle material due to the rapid temperature change caused by the rapid cooling of the pipe nozzle is greatly reduced, as well as the resulting shortened service life of the pipe nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the existing glass liquid blocking method.

[0027] Figure 2 It is a sectional view of the front view of the blocking device of the present invention.

[0028] Figure 3 It is a cross-sectional view of the indirect cooling ring of the present invention.

[0029] Figure 4 It is a cross-sectional view of the flow blocking device of the present invention.

[0030] Figure 5 It is a cross-sectional view of another structure of the flow blocking device of the present invention.

[0031] Figure 6 It is a front view of the cutting device of the present invention.

[0032] Figure 7 yes Figure 6 Top view of . DETAILED DESCRIPTION

[0033] When pipeline 1 completes the block production process, during the high-flow, high-temperature production process, it is difficult to stop the flow of molten glass 6 in pipeline 1 by simply lowering the temperature of pipeline 1 or using simple air cooling. To reduce the loss of molten glass 6 caused by the blocking process, it is necessary to stop the normal flow of molten glass 6 in pipeline 1 as soon as possible to quickly stop the flow of molten glass 6 in pipeline 1.

[0034] like Figure 2As shown, the glass liquid rapid blocking device of the present invention includes an indirect cooling ring 3, a flow blocking device 4 and a cut-off device 5, wherein the indirect cooling ring 3 is arranged above the pipe mouth of the pipeline 1 and surrounds the surface of the pipeline 1; the flow blocking device 4 is arranged between the cut-off device 5 and the pipe mouth of the pipeline 1, and the flow blocking device 4 is arranged at the pipe mouth of the pipeline 1, and the leakage hole 404 of the flow blocking device 4 is arranged at the center of the pipe mouth of the pipeline 1, and the size of the leakage hole 404 is smaller than the size of the pipe mouth of the pipeline 1; the cut-off device 5 is arranged below the flow blocking device 4, and the size of the sealing plate 505 of the cut-off device 5 is larger than the size of the leakage hole 404.

[0035] The indirect cooling ring 3 includes a ring body inlet 301, a ring body 302 and a ring outlet 303. Figure 3 As shown. The ring body 302 is a hollow structure with a cavity provided inside. The ring body 302 is provided with a ring body inlet 301 connected to the cavity, and a number of annular outlets 303 are evenly distributed on the inner side of the ring body 302. When the indirect cooling ring 3 is working, cooling gas, such as air, oxygen, nitrogen and other cooling gases, is fed in through the ring body inlet 301. After the gas enters the ring body 302, it quickly fills the internal cavity of the ring body 302 and is blown out from the several annular outlets 303 of the ring body 302 to the surface of the pipe 1, thereby quickly realizing convection heat exchange on the surface of the pipe 1, taking away the heat of the glass liquid 6 in the pipe 1 and the pipe mouth, and achieving the purpose of assisting in lowering the temperature of the glass liquid 6. In order to achieve the best effect of the indirect cooling ring 3 during use, it is preferred that the inner diameter of the ring body 302 is 2-5 times the outer diameter of the pipe 1, so as to ensure the cooling uniformity of the gas blown out of the annular outlet 303. The cooling medium introduced into the indirect cooling ring 3 preferably has a pressure of 0.3 MPa or higher, with an optimal pressure of 0.3-0.7 MPa, to ensure that the gas flow rate blown out of the annular outlet 303 meets the process requirements. The gas source used for the cooling medium is preferably compressed gas with a temperature below 35°C to ensure effective heat exchange on the surface of the pipeline 1.

[0036] The flow blocking device 4 includes a first support 401, a first support rod 402, a cooling plate 403, a leakage hole 404, a first cooling medium inlet 405 and a first cooling medium outlet 406. Figure 2 、 4As shown, the cooling plate 403 is a hollow structure with a cavity provided inside, a first cooling medium inlet 405 and a first cooling medium outlet 406 are provided on the cooling plate 403 and connected to the cavity, the cooling medium enters through the first cooling medium inlet 405 and fills the cavity, and then flows out through the first cooling medium outlet 406, circulating continuously; a leakage hole 404 is provided at the center of the cooling plate 403, the leakage hole 404 consists of three parts: a leakage hole inlet 701, a leakage hole middle section 702 and a leakage hole outlet 703; the cooling plate 403 is connected to the first support rod 402, and the first support rod 402 is provided on the first support 401, which is used to adjust the position of the cooling plate 403 and the leakage hole 404 to ensure that when the flow blocking device 4 is working, the cooling plate 403 can be quickly positioned below the pipe 1, and the leakage hole 404 is within the flow cross-section of the glass liquid 6 in the pipe 1, and preferably the central axis of the leakage hole 404 coincides with the central axis of the pipe 1.

[0037] In order to ensure the deceleration effect of the flow-blocking device 4 on the flow of the glass liquid 6, the cross-sectional area of ​​the leakage hole inlet 701 is preferably less than or equal to the cross-sectional area of ​​the pipe mouth 1, but the minimum cross-sectional area of ​​the leakage hole 404 is greater than or equal to 0.5 times the cross-sectional area of ​​the pipe mouth 1. The height h of the leakage hole 404 is greater than or equal to 5 mm, and preferably the height h is less than or equal to the outer diameter of the pipe 1. The shape of the leakage hole 404 in the height direction can be a geometric structure with a large inlet and a small outlet, such as a columnar or stepped columnar shape, so as to achieve a gradual decrease in the cross-sectional area of ​​the glass liquid 6. When the glass liquid 6 flows through the leakage hole 404, the resistance gradually increases. Therefore, it is preferred that the cross-sectional area of ​​the leakage hole inlet 701 is greater than or equal to the cross-sectional area of ​​the leakage hole outlet 703.

[0038] The flow blocking device 4 also includes an auxiliary support 407, which is arranged below the first support rod 402, for supporting the first support rod 402 and improving the structural stability of the first support rod 402 and fine-tuning the cooling plate 403, thereby preventing the first support rod 402 from being significantly deformed during operation, causing the glass liquid 6 to overflow directly from the upper surface of the cooling plate 403.

[0039] The flow blocking device 4 also includes a stopper 408, which is disposed on the upper surface of the cooling plate 403. The stopper 408 has a height greater than or equal to 10 mm and is preferably 10-50 mm away from the outer surface of the pipe 1. The narrow gap formed between the stopper 408 and the outer surface of the pipe 1 effectively prevents the molten glass 6 from overflowing when flowing through the cooling plate 403.

[0040] The main function of flow blocking device 4 during the blocking process is as follows: cooling plate 403 contacts and cools the molten glass 6 discharged from the outlet of pipe 1, increasing the local resistance to glass flow. The cooled molten glass 6 quickly forms an immobile layer, and then flows through leakage hole inlet 701, through leakage hole middle section 702, to leakage hole outlet 703, and finally out of leakage hole outlet 703. During this process, the molten glass 6 contacting the surface of leakage hole 404 cools and changes its cross-section, causing the flow rate of the molten glass 6 to decrease rapidly, creating favorable conditions for blocking device 5.

[0041] like Figure 5 As shown, in another embodiment, the cooling plate 403 and the leakage hole 404 of the flow blocking device 4 are divided into two parts from the center, and the two parts are mirror-symmetrical structures. Among them, the leakage hole 404 of one part is a semicircular structure, and the cooling circuit in the cooling plate 403 is an independent structure, which is respectively provided with a first cooling medium inlet 405 and a first cooling medium outlet 406. When working, the cooling plates 403 and the leakage hole 404 on both sides are placed under the pipe 1 at the same time. At this time, the leakage hole 404 forms a similar Figure 4 The circular cross-section shown in FIG. 1 is used to achieve local cooling of the glass liquid 6 and increase the local resistance to the flow of the glass liquid 6 .

[0042] like Figure 6 、 7 As shown, the cutting device 5 includes a second support 501, a second support rod 502, a second cooling medium inlet 503, a second cooling medium outlet 504 and a sealing plate 505, wherein the sealing plate 505 is a hollow structure with a cavity provided inside, the second cooling medium inlet 503 and the second cooling medium outlet 504 are provided on the sealing plate 505 and connected to the cavity, the cooling medium enters the internal cavity of the sealing plate 505 through the second cooling medium inlet 503, then circulates inside the sealing plate 505, and finally flows out through the second cooling medium outlet 504; the sealing plate 505 is connected to the second support rod 502, and the second support rod 502 is provided on the second support 501, the second support 501 is used to adjust the horizontal and height positions of the sealing plate 505, and provide structural support for the sealing plate 505 through the second support rod 502; the sealing plate 505 is provided directly below the leakage hole 404 and is close to the lower surface of the cooling plate 403.

[0043] The sealing plate 505 is made of a heat-resistant metal material with a thickness of 2-8 mm; the cooling plate 403 and the sealing plate 505 are made of a metal material with good ductility and thermal conductivity, preferably a nickel-chromium alloy material with good heat resistance, and the cooling plate 403 can be made of a heat-resistant metal material with a thickness of 2-8 mm; in order to ensure normal heat exchange between the cooling medium and the high-temperature glass, the sealing plate 505 is preferably made of a metal material with a thermal conductivity coefficient of not less than 15 w / (mK) at room temperature, and more preferably a metal material with a thermal conductivity coefficient of 20 w / (mK) or more at room temperature.

[0044] Before working, the cutting-off device 5 needs to pass the cooling medium into the sealing plate 505 so that the cooling medium in the sealing plate 505 is in a circulating flow state. Then, after confirming that the indirect cooling ring 3 and the flow-blocking device 4 are installed normally, the position of the second support 501 of the cutting-off device 5 is adjusted, and the sealing plate 505 is pressed against the lower surface of the cooling plate 403 of the flow-blocking device 4 through the second support rod 502 and quickly pushed into the bottom of the leakage hole 404 to cut off the glass liquid 6 flowing out of the leakage hole outlet 703. Then, the sealing plate 505 is kept stationary, and the cooling effect and flow blocking effect of the sealing plate 505, the leakage hole 404, the cooling plate 403, and the indirect cooling ring 3 are used to achieve rapid cooling and deceleration of the glass liquid 6 flowing out of the pipe mouth of the pipe 1, thereby achieving a change in the flow state of the glass liquid 6 in the pipe 1 and achieving the interruption and blocking of the glass liquid 6 at the pipe mouth of the pipe 1.

[0045] The blocking device 4 and the shut-off device 5 both use a cooling medium to perform heat exchange with the glass liquid 6. The cooling medium is preferably liquid or gas. When a liquid is used, a material with a large specific heat capacity is preferred, and water or oil can be preferably used as the cooling medium. The pressure of the cooling medium source is preferably not less than 0.3 MPa, and the inlet temperature is not more than 30°C, so as to facilitate on-site blocking operation control.

[0046] By adopting the blocking device of the present invention, at the end of the process, the indirect cooling ring 3 can be first set above the pipe mouth of the pipeline 1 and surround the surface of the pipeline 1, and the cooling gas can be passed into the indirect cooling ring 3, and the pipe mouth of the pipeline 1 and the glass liquid 6 at the pipe mouth are cooled by the indirect cooling ring 3; then the flow blocking device 4 is moved to the bottom of the pipeline 1, and the flow area of ​​the glass liquid 6 below the pipe mouth is reduced by the cooling effect of the cooling plate 403 and the diversion effect of the leakage hole 404, and the heat exchange effect when the cooling plate 403 contacts the glass liquid 6 can form a larger local resistance position when the glass liquid 6 flows through this place, thereby increasing the pressure loss during the flow of the glass liquid 6, and then reducing the flow dynamics of the glass liquid 6; then the cut-off device 5 is quickly placed directly below the flow blocking device 4 to achieve the sealing and cooling effects on the glass liquid 6, thereby quickly cooling the glass liquid 6 flowing out of the pipe mouth, thereby blocking the flow of the glass liquid 6 in the pipeline 1 and achieving the blocking of the pipeline 1.

[0047] The various parts of the blocking device of the present invention are organically combined, and the blocking of the pipeline 1 is achieved by gradually increasing the flow resistance of the glass liquid 6, which solves the problem that the pipeline 1 is difficult to block quickly after a short period of high flow production, and reduces the pressure change on the pipe wall of the pipeline 1 caused by the rapid change in the flow rate of the glass liquid 6 when the pipeline 1 is blocked, thereby improving the overall service life of the pipeline 1; the indirect cooling blocking method of the above-mentioned blocking device can greatly reduce the problem of aging of the pipe mouth material and shortened service life caused by the rapid temperature change caused by the rapid cooling of the pipe mouth of the pipeline 1.

[0048] The present invention provides a method for quickly blocking the flow of molten glass in a pipeline by using the blocking device of the above structure. The method comprises the following steps:

[0049] 1) After the glass block production process is completed, the ambient temperature of the pipe 1 and the heat of the pipe 1 are quickly reduced, thereby indirectly reducing the temperature of the glass liquid 6 near the wall of the pipe 1 through heat exchange when the glass liquid 6 flows through the pipe 1, thereby increasing the glass viscosity and the flow pressure loss of the glass liquid 6, thereby reducing the fluidity of the glass liquid 6 in the pipe 1;

[0050] 2) Adjust the position of the indirect cooling ring 3 and place it above the nozzle of the pipeline 1. Then, introduce a cooling medium into the indirect cooling ring 3 and evenly distribute the cooling medium to the nozzle of the pipeline 1 through the annular outlet 303 on the indirect cooling ring 3. The cooling medium flows at a high speed and quickly removes the heat from the surface of the molten glass 6, thereby reducing the flow velocity and surface temperature of the molten glass 6 and increasing its flow resistance.

[0051] 3) After the indirect cooling ring 3 starts working, the first support 401 of the flow blocking device 4 is adjusted, and the height position of the upper surface of the cooling plate 403 is adjusted to be below the pipe opening of the pipe 1. The cooling plate 403 is quickly moved to be directly below the pipe 1. Through the coordinated action of the pipe 1, the cooling plate 403, and the leakage hole 404, the flow cross-section of the glass liquid 6 is rapidly reduced. The area of ​​the upper surface of the cooling plate 403 contacting the glass liquid 6 can achieve rapid cooling of the glass liquid 6 flowing out of the pipe 1. At the same time, due to the diameter difference between the leakage hole 404 and the pipe 1, the cross-sectional area of ​​the glass liquid 6 after flowing through the leakage hole 404 is greatly reduced. The increased flow resistance will also lead to a decrease in the glass flow rate.

[0052] 4) After the flow blocking device 4 is operating normally, adjust the position of the second support 501 and the sealing plate 505 of the cut-off device 5, fit the sealing plate 505 to the lower surface of the flow blocking device 4, and quickly cut off the glass liquid 6 flowing out of the leakage hole 404. The cooling circuit in the sealing plate 505 can quickly cool the glass liquid 6 above the sealing plate 505, so that the glass liquid 6 in the pipeline 1 no longer flows, and the pipeline 1 is blocked.

[0053] By adopting the above blocking method, the blocking device can realize rapid blocking of a large flow of glass liquid 6 above 50 L / h. The preferred flow of glass liquid 6 is 100-2000 L / h, and the most preferred flow of glass liquid 6 is 300-1500 L / h.

[0054] By adopting the above blocking method, the blocking device can achieve high-efficiency blocking during the flow of the glass liquid 6 in the pipeline when the viscosity is in the range of 10-5000 poise. The preferred viscosity range of the glass liquid 6 is 10-2000 poise.

[0055] By adopting the above blocking method, the applicable temperature range of the blocking device can be enhanced by selecting a suitable cooling medium, thereby achieving high-efficiency blocking when the temperature of the glass liquid 6 in the pipeline 1 is 1200-1500°C at the end of the glass block production process, and the preferred temperature range of the glass liquid 6 is 1250-1425°C.

[0056] When using the above blocking method, the size of the pipe 1 carrying the glass liquid has a great influence on blocking the flow of the glass liquid 6. It is preferred to use the pipe 1 when its diameter is in the range of 20-100mm, and more preferably the pipe 1 diameter is 30-90mm, at which time efficient blocking of the pipe 1 can be achieved.

[0057] The above blocking method is particularly suitable for blocking pipelines during the production of glass block products with a diameter exceeding 300 mm, and is particularly suitable for blocking pipelines during the production of glass block products with a diameter exceeding 1 m.

[0058] The present invention uses a cooling plate 403, a leakage hole 404, and a sealing plate 505 to cooperate with each other, thereby gradually increasing the pressure loss during the flow of the glass liquid, thereby quickly reducing the flow dynamics of the glass liquid. Moreover, through the heat exchange between the three and the glass liquid, the glass liquid flowing out of the pipe nozzle can be quickly cooled, so that the viscosity of the glass liquid increases rapidly near the interface after contacting the cooling plate 403, the leakage hole 404, and the sealing plate 505, and loses fluidity, thereby gradually reducing the flow cross-section of the glass liquid and ultimately blocking the flow of the glass liquid at the pipe nozzle. The above device and method can greatly improve the success rate of pipe blocking when producing high-flow, ultra-high-temperature glass liquid, thereby reducing the glass loss rate caused by long glass blocking time and reducing production and research and development costs.

[0059] The blocking device and blocking method of the present invention are suitable for blocking the flow of glass liquid in the pipeline at the end of large-flow production of products such as high-viscosity glass, glass containing volatile components, easy-to-crystallize glass, and special-purpose glass. They are particularly suitable for blocking the pipeline at the end of production of large-block glass such as microcrystalline glass and radiation-resistant glass.

Claims

1. Glass liquid blocking device, characterized in that: The invention comprises an indirect cooling ring (3), a flow blocking device (4) and a cut-off device (5), wherein the indirect cooling ring (3) is arranged above the pipe mouth of the pipeline (1) and surrounds the surface of the pipeline (1); the flow blocking device (4) comprises a cooling plate (403), a leakage hole (404), a first cooling medium inlet (405) and a first cooling medium outlet (406); the flow blocking device (4) is arranged at the pipe mouth of the pipeline (1), and the leakage hole (404) is arranged at the center of the pipe mouth of the pipeline (1); the size of the leakage hole (404) is smaller than the size of the pipe mouth of the pipeline (1); and the cooling plate (403) is provided inside. A cavity is provided, and the first cooling medium inlet (405) and the first cooling medium outlet (406) are provided on the cooling plate (403); the cut-off device (5) comprises a second cooling medium inlet (503), a second cooling medium outlet (504) and a sealing plate (505); the cut-off device (5) is provided below the flow-blocking device (4), and the size of the sealing plate (505) is larger than the size of the leakage hole (404); a cavity is provided inside the sealing plate (505), and the second cooling medium inlet (503) and the second cooling medium outlet (504) are provided on the sealing plate (505).

2. The glass liquid blocking device according to claim 1, wherein: A cavity is provided inside the ring body (302) of the indirect cooling ring (3); a ring body inlet (301) connected to the cavity is provided on the ring body (302); and a plurality of annular outlets (303) are evenly distributed inside the ring body (302).

3. The glass liquid blocking device according to claim 2, wherein: The inner diameter of the ring body (302) is 2-5 times the outer diameter of the pipeline (1); the pressure of the cooling medium introduced into the indirect cooling ring (3) is 0.3 MPa or above; and the cooling medium is compressed gas with a temperature below 35°C.

4. The glass liquid blocking device according to claim 1, wherein: The pressure of the cooling medium introduced into the indirect cooling ring (3) is 0.3-0.7 MPa.

5. The glass liquid blocking device according to claim 1, wherein: The flow blocking device (4) further comprises a first support (401) and a first support rod (402); a material leakage hole (404) is provided at the center of the cooling plate (403); the cooling plate (403) is connected to the first support rod (402), and the first support rod (402) is provided on the first support (401).

6. The glass liquid blocking device according to claim 1, wherein: The leakage hole (404) consists of three parts: a leakage hole inlet (701), a leakage hole middle section (702) and a leakage hole outlet (703); the cross-sectional area of ​​the leakage hole inlet (701) is less than or equal to the cross-sectional area of ​​the pipe mouth (1), and the cross-sectional area of ​​the leakage hole inlet (701) is greater than or equal to the cross-sectional area of ​​the leakage hole outlet (703); and the minimum cross-sectional area of ​​the leakage hole (404) is greater than or equal to 0.5 times the cross-sectional area of ​​the pipe mouth (1).

7. The glass liquid blocking device according to claim 1, wherein: The flow blocking device (4) further comprises an auxiliary support (407) and a limit block (408), wherein the auxiliary support (407) is arranged below the first support rod (402); the limit block (408) is arranged on the upper surface of the cooling plate (403), and the height of the limit block (408) is greater than or equal to 10 mm, and the limit block (408) is 10-50 mm away from the outer surface of the pipeline (1).

8. The glass liquid blocking device according to claim 1, wherein: The cooling plate (403) and the leakage hole (404) of the flow blocking device (4) are divided into two parts from the center, and the two parts are mirror-symmetrical structures. The cooling circuits in the cooling plates (403) of the two parts are independent structures, and are respectively provided with a first cooling medium inlet (405) and a first cooling medium outlet (406).

9. The glass liquid blocking device according to claim 1, wherein: The height h of the leakage hole (404) is greater than or equal to 5 mm.

10. The glass liquid blocking device according to claim 1, wherein: The height h of the leakage hole (404) is less than or equal to the outer diameter of the pipeline (1).

11. The glass liquid blocking device according to claim 1, wherein: The central axis of the leakage hole (404) coincides with the central axis of the pipeline (1), and the flow blocking device (4) is arranged between the cut-off device (5) and the pipe opening of the pipeline (1).

12. The glass liquid blocking device according to claim 1, wherein: The cutting device (5) further comprises a second support (501) and a second support rod (502), the sealing plate (505) is connected to the second support rod (502), and the second support rod (502) is arranged on the second support (501); the sealing plate (505) is arranged directly below the leakage hole (404) and in close contact with the lower surface of the cooling plate (403).

13. A glass liquid blocking method, characterized in that: The method comprises the following steps: 1) After the glass block production process is completed, the ambient temperature of the pipe (1) and the heat of the pipe (1) are quickly reduced, and when the glass liquid (6) flows through the pipe (1), the temperature of the glass liquid (6) near the wall of the pipe (1) is indirectly reduced through heat exchange, thereby increasing the glass viscosity, increasing the flow pressure loss of the glass liquid (6), and reducing the fluidity of the glass liquid (6) in the pipe (1); 2) placing the indirect cooling ring (3) above the nozzle of the pipeline (1), and introducing a cooling medium into the indirect cooling ring (3), and evenly distributing the cooling medium to the nozzle of the pipeline (1) through the annular outlet (303) on the indirect cooling ring (3), so that the cooling medium flows at a high speed, quickly removing the heat on the surface of the glass liquid (6), reducing the flow speed of the glass liquid (6) and the surface temperature of the glass liquid (6), and increasing its flow resistance; 3) When adjusting the first support (401) of the flow-blocking device (4) and adjusting the height position of the upper surface of the cooling plate (403) to below the pipe opening of the pipe (1), the cooling plate (403) is quickly moved to directly below the pipe (1), and the flow cross-section of the glass liquid (6) is quickly reduced through the cooperation of the pipe (1), the cooling plate (403), and the leakage hole (404), and the area of ​​the upper surface of the cooling plate (403) in contact with the glass liquid (6) can achieve rapid cooling of the glass liquid (6) flowing out of the pipe (1); at the same time, due to the diameter difference between the leakage hole (404) and the pipe (1), the cross-sectional area of ​​the glass liquid (6) after flowing through the leakage hole (404) can be greatly reduced, and the flow resistance is increased, resulting in a decrease in the glass flow rate; 4) adjusting the positions of the second support (501) and the sealing plate (505) of the blocking device (5), placing the sealing plate (505) on the lower surface of the flow blocking device (4), and quickly blocking the glass liquid (6) flowing out of the leakage hole (404); and rapidly cooling the glass liquid (6) above the sealing plate (505) through a cooling circuit in the sealing plate (505), thereby blocking the glass liquid (6) in the pipeline (1).

14. The glass liquid blocking method according to claim 13, wherein: The rapid blocking of large-flow glass liquid (6) with a flow rate of more than 50 L / h can be achieved.

15. The glass liquid blocking method according to claim 13, wherein: The rapid blocking of the glass liquid (6) with a flow rate of 100-2000 L / h can be achieved.

16. The glass liquid blocking method according to claim 13, wherein: The rapid blocking of the glass liquid (6) with a flow rate of 300-1500 L / h can be achieved.

17. The glass liquid blocking method according to claim 13, wherein: High-efficiency blocking can be achieved during the flow of glass liquid (6) in the pipeline (1) when the viscosity is 10-5000 poise.

18. The glass liquid blocking method according to claim 13, wherein: High-efficiency blocking can be achieved during the flow of glass liquid (6) in the pipeline (1) when the viscosity is 10-2000 poise.

19. The glass liquid blocking method according to claim 13, wherein: The invention can realize high-efficiency blocking when the temperature of the glass liquid (6) in the pipeline (1) is 1200-1500° C. at the end of the glass block production process.

20. The glass liquid blocking method according to claim 13, wherein: High-efficiency blocking can be achieved when the temperature of the glass liquid (6) in the pipeline (1) is 1250-1425° C. at the end of the glass block production process.

21. The glass liquid blocking method according to claim 13, wherein: The diameter of the pipe (1) is 20-100 mm.

22. The glass liquid blocking method according to claim 13, wherein: The diameter of the pipe (1) is 30-90 mm.

Images