Ceramic liquid-lift tube flange sealing and compression device

Abstract

The utility model discloses a kind of ceramic liquid lift pipe flange sealing compression devices, it is related to flange sealing compression device technical field, including first flange, second flange and sealing structure;First, the connecting ring of sealing structure is attached to the inner side wall of first flange and second flange respectively, then screw is rotated into connecting groove and is connected with round hole thread, by the fastening effect of screw, the connecting ring with sealing ring can be detachably fixed in the inner side wall of first flange and second flange, to complete the sealing assembly assembly of two flanges, and the characteristics of flexible graphite composite sealing ring are used to build sealing base;Sealing ring uses flexible graphite composite material, with good high-temperature resistance, corrosion resistance and sealing performance, under the compression effect of flange, it can tightly fill the gap in the inner side of flange, prevent fluid leakage;When sealing ring appears abrasion or aging, connecting ring can be removed by disassembling screw, and after replacing new sealing ring, it is reinstalled, ensure that the sealing reliability of device long-term use.

Description

Technical Field

[0001] This utility model relates to the technical field of flange sealing and pressing devices, specifically a ceramic riser pipe flange sealing and pressing device. Background Technology

[0002] Ceramic riser pipes are tubular components made primarily of high-temperature and corrosion-resistant special ceramics such as corundum ceramics and silicon nitride ceramics. They are widely used in metal casting processes, especially in low-pressure and differential-pressure casting. As a crucial channel connecting the holding furnace and the mold, their core function is to transport the molten metal in the holding furnace to the mold cavity, providing a stable source of molten metal for casting. Commonly transported metals include aluminum alloys, magnesium alloys, and copper alloys. During the transport process, it is essential to ensure the stability and continuity of the molten metal flow to avoid affecting the casting quality due to unstable flow. The advantages of ceramic riser pipes stem from the ceramic material... The ceramic riser pipe possesses excellent physicochemical properties, allowing it to withstand the erosion of molten metal at temperatures ranging from several hundred to over a thousand degrees Celsius without deformation or damage. It also exhibits good chemical stability, not reacting with the molten metal and effectively preventing contamination, thus ensuring the purity of the molten metal. These two characteristics not only guarantee the safety of the molten metal transport process but also lay the foundation for the quality of subsequent castings. In actual casting operations, ceramic riser pipes typically employ a segmented design. This design is primarily to adapt to the structural differences of various casting equipment, meet the production requirements of different casting heights, and facilitate equipment installation, maintenance, and repair. The riser pipe is assembled by connecting flanges, forming a complete molten metal transport pipeline. However, the performance of the flange connection directly affects the safety and efficiency of casting production. Since it transports high-temperature molten metal, and the casting process often requires applying pressure to the molten metal (e.g., in low-pressure casting, where gas pressure propels the molten metal upwards along the riser pipe), gaps or poor sealing at the flange connection can cause a series of problems. High-temperature molten metal may leak from the gaps, resulting in significant waste of raw materials. Splashing molten metal can also damage casting equipment and molds, and even burn operators. Personnel can be injured, leading to safety accidents. Simultaneously, outside air can enter the pipeline through gaps, forming oxide inclusions upon contact with the high-temperature molten metal. These impurities enter the mold with the molten metal, causing defects such as porosity and sand holes in the casting, significantly reducing the product qualification rate. Furthermore, leaks under pressure can disrupt the pressure stability of the molten metal transport, resulting in uneven filling speed, affecting the casting accuracy, and in severe cases, forcing the casting process to stop, causing production losses for the enterprise. Therefore, those skilled in the art have provided a ceramic riser pipe flange sealing and clamping device to solve the problems mentioned in the background art. Utility Model Content

[0003] The purpose of this invention is to provide a ceramic riser pipe flange sealing and pressing device to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A ceramic riser pipe flange sealing and clamping device includes a first flange, a second flange, and a sealing structure. A first ceramic riser pipe is fixedly connected to the top of the first flange, and a second ceramic riser pipe is fixedly connected to the bottom of the second flange. The sealing structure can be detachably connected to the inner sidewalls of both the first flange and the second flange.

[0005] As a further embodiment of this utility model: the sealing structure includes a connecting ring, a sealing ring, a screw, and a connecting groove. The inner sidewall of the connecting ring is fixedly connected to the sealing ring, and the sealing ring is a flexible graphite composite sealing ring. The top of the connecting ring is circularly and equidistantly provided with four connecting grooves, and each connecting groove is threaded with a screw.

[0006] As a further embodiment of this utility model: the outer wall of the first flange is circularly fixedly connected with a number of first connecting blocks arranged at equal intervals, and each first connecting block is provided with an upper connecting hole, and a bolt is fitted into the upper connecting hole.

[0007] As a further improvement of this utility model: the bottom of the first flange is circularly fixedly connected with a number of locating bolts arranged at equal intervals.

[0008] As a further embodiment of this utility model: the outer wall of the second flange is circularly fixedly connected with a number of second connecting blocks arranged at equal intervals, and each second connecting block is provided with a lower connecting hole corresponding to the bolt.

[0009] As a further improvement of this utility model: a first nut is threaded onto the bolt, the outer end of the first connecting block, and the outer end of the second connecting block.

[0010] As a further embodiment of this utility model: the bottom of the first flange and the top of the second flange are both circularly and equally spaced, with four circular holes corresponding to the screws on the sealing structure, and the circular holes are threadedly connected to the screws.

[0011] As a further embodiment of this utility model: the top of the second flange is provided with a plurality of through holes that are equally spaced in a circle and correspond to the positioning bolts, and the positioning bolts and the bottom of the second flange are threadedly connected with second nuts.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. In use, firstly, the connecting ring of the sealing structure is fitted onto the inner walls of the first and second flanges respectively, so that the connecting groove on the connecting ring is aligned with the round hole on the first and second flanges. Then, the screw is screwed into the connecting groove and threaded into the round hole. Through the tightening action of the screw, the connecting ring with the sealing ring is detachably fixed to the inner walls of the first and second flanges, thereby completing the assembly of the sealing components of the two flanges, and the sealing foundation is constructed by utilizing the characteristics of the flexible graphite composite sealing ring. Since the sealing ring is made of flexible graphite composite material, it has good high temperature resistance, corrosion resistance and sealing performance. Under the compression of the flange, it can tightly fill the gap inside the flange, effectively preventing fluid leakage. At the same time, the detachable sealing structure design facilitates the subsequent replacement and maintenance of the sealing ring. When the sealing ring is worn or aged, the connecting ring can be removed by removing the screw, and a new sealing ring can be replaced and reinstalled to ensure the sealing reliability of the device for long-term use. 2. Next, align the locating bolt at the bottom of the first flange with the through hole at the top of the second flange, and insert the locating bolt into the through hole until the bottom of the first flange and the top of the second flange are in contact. At this time, the sealing structure on the inner side of the first flange and the sealing structure on the inner side of the second flange are also aligned, and the two sealing rings press against each other, thereby achieving a seal at the flange connection. At the same time, the insertion of the locating bolt ensures that the first flange and the second flange will not shift relative to each other during the subsequent connection process, ensuring accurate alignment of the connection holes. 3. After positioning, pass the bolts through the upper connecting hole on the first connecting block and the lower connecting hole on the second connecting block, ensuring that each bolt passes through the corresponding upper and lower connecting holes. Then, screw the first nut into both ends of each bolt, i.e. the outer ends of the first and second connecting blocks. By tightening the first nut symmetrically and gradually, the bolts will generate tension, causing the first flange and the second flange to fit more tightly together. At the same time, the sealing rings of the two sealing structures will be subjected to greater compressive force, giving full play to the sealing performance of the flexible graphite composite sealing ring and achieving reliable sealing of the flange connection. 4. Finally, after the bolts and the first nut are tightened, the second nut is screwed into the part of the positioning bolt that extends out of the bottom of the second flange, and the second nut is tightened until it fits tightly against the bottom of the second flange. Through the threaded engagement between the second nut and the positioning bolt, the relative positions of the first flange and the second flange are fixed for a second time, which further enhances the stability of the flange connection. This effectively prevents the flange from shifting due to vibration and other factors during the use of the device, and further ensures the sealing effect of the sealing structure and the connection reliability of the overall device. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of a ceramic riser pipe flange sealing and clamping device.

[0014] Figure 2This is a schematic diagram showing the structural separation of a ceramic riser pipe flange sealing and clamping device.

[0015] Figure 3 This is a schematic diagram of the first flange connection structure in a ceramic riser pipe flange sealing and clamping device.

[0016] Figure 4 This is a schematic diagram of the second flange connection structure in a ceramic riser pipe flange sealing and clamping device.

[0017] Figure 5 This is a schematic diagram of the sealing structure in a ceramic riser pipe flange sealing and tightening device.

[0018] In the diagram: 1. First ceramic riser pipe; 2. Second ceramic riser pipe; 3. First flange; 4. Second flange; 5. Sealing structure; 51. Connecting ring; 52. Sealing ring; 53. Screw; 54. Connecting groove; 6. First connecting block; 7. Second connecting block; 8. Upper connecting hole; 9. Bolt; 10. First nut; 11. Locating bolt; 12. Second nut; 13. Through hole; 14. Lower connecting hole; 15. Round hole. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0020] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5This embodiment provides a ceramic riser pipe flange sealing and clamping device, including a first flange 3, a second flange 4, and a sealing structure 5. A first ceramic riser pipe 1 is fixedly connected to the top of the first flange 3, and a second ceramic riser pipe 2 is fixedly connected to the bottom of the second flange 4. The sealing structure 5 is detachably connected to the inner walls of both the first flange 3 and the second flange 4. A plurality of equally spaced first connecting blocks 6 are fixedly connected to the outer wall of the first flange 3 in a circular shape, and each first connecting block 6 has an upper connecting hole 8, with a bolt 9 fitted inside each upper connecting hole 8. A plurality of equally spaced... The positioning bolt 11; the outer wall of the second flange 4 is circularly fixedly connected with several equally spaced second connecting blocks 7, and each second connecting block 7 has a lower connecting hole 14 corresponding to the bolt 9; the bolt 9, the outer ends of the first connecting block 6 and the second connecting block 7 are all threaded with a first nut 10. The bolt 9 is passed through the upper connecting hole 8 on the first connecting block 6 and the lower connecting hole 14 on the second connecting block 7, respectively, to ensure that each bolt 9 passes through the corresponding upper and lower connecting holes. Then, the first nut 10 is screwed into both ends of each bolt 9, that is, the outer ends of the first connecting block 6 and the second connecting block 7, respectively. By symmetrically and gradually tightening the first nut 10, the bolt 9 generates tension, causing the first flange 3 and the second flange 4 to fit more tightly together. Simultaneously, the sealing rings 52 of the two sealing structures 5 are subjected to greater compressive force, fully utilizing the sealing performance of the flexible graphite composite sealing rings to achieve reliable sealing at the flange connection. The bottom of the first flange 3 and the top of the second flange 4 each have four circular holes 15 at equal intervals, corresponding to the screws 53 on the sealing structure 5, and these holes 15 are threadedly connected to the screws 53. The top of the second flange 4 has several circular through holes 13 at equal intervals, corresponding to the positioning bolts 11. Furthermore, a second nut 12 is threaded onto the positioning bolt 11 and the bottom of the second flange 4. Align the positioning bolt 11 at the bottom of the first flange 3 with the through hole 13 at the top of the second flange 4, and insert the positioning bolt 11 into the through hole 13 until the bottom of the first flange 3 and the top of the second flange 4 are in contact. At this time, the sealing structure 5 on the inner side of the first flange 3 and the sealing structure 5 on the inner side of the second flange 4 are also connected, and the two sealing rings 52 are pressed against each other, thereby achieving a seal at the flange connection. At the same time, the insertion of the positioning bolt 11 ensures that the first flange 3 and the second flange 4 will not be relatively offset during subsequent connection, ensuring accurate alignment of the connection holes. Example

[0021] Reference Figure 5This embodiment is based on the previous embodiment, but differs in that the sealing structure 5 includes a connecting ring 51, a sealing ring 52, a screw 53, and a connecting groove 54. The sealing ring 52 is fixedly connected to the inner wall of the connecting ring 51, and the sealing ring 52 is a flexible graphite composite sealing ring. The top of the connecting ring 51 has four circularly spaced connecting grooves 54, and each connecting groove 54 is threaded with a screw 53. The connecting ring 51 of the sealing structure 5 is respectively attached to the inner wall of the first flange 3 and the second flange 4, so that the connecting groove 54 on the connecting ring 51 is aligned with the circular hole 15 on the first flange 3 and the second flange 4. Then, the screw 53 is screwed into the connecting groove 54 and threadedly connected to the circular hole 15. The screw 53 tightens and the sealing structure is sealed. The connecting ring 51 with sealing ring 52 is detachably fixed to the inner wall of the first flange 3 and the second flange 4, thereby completing the assembly of the sealing components of the two flanges and constructing a sealing base using the characteristics of the flexible graphite composite sealing ring. Since the sealing ring 52 is made of flexible graphite composite material, it has good high temperature resistance, corrosion resistance and sealing performance. Under the compression of the flange, it can tightly fill the gap inside the flange and effectively prevent fluid leakage. At the same time, the detachable sealing structure 5 is designed to facilitate the subsequent replacement and maintenance of the sealing ring 52. When the sealing ring 52 is worn or aged, the connecting ring 51 can be removed by removing the screw 53, and a new sealing ring 52 can be replaced and reinstalled to ensure the sealing reliability of the device for long-term use.

[0022] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0023] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A ceramic riser pipe flange sealing and clamping device, comprising a first flange (3), a second flange (4), and a sealing structure (5), characterized in that, The first flange (3) is fixedly connected to the top of the first ceramic riser pipe (1), and the second flange (4) is fixedly connected to the bottom of the second ceramic riser pipe (2). The inner walls of the first flange (3) and the second flange (4) are detachably connected to a sealing structure (5). The sealing structure (5) includes a connecting ring (51), a sealing ring (52), a screw (53) and a connecting groove (54). The inner side wall of the connecting ring (51) is fixedly connected to the sealing ring (52), and the sealing ring (52) is a flexible graphite composite sealing ring. The top of the connecting ring (51) is provided with four connecting grooves (54) at equal intervals in a circular shape. Each connecting groove (54) is threaded with a screw (53).

2. The ceramic riser pipe flange sealing and clamping device according to claim 1, characterized in that, The outer wall of the first flange (3) is fixedly connected with a number of first connecting blocks (6) arranged at equal intervals, and each first connecting block (6) is provided with an upper connecting hole (8), and a bolt (9) is fitted in the upper connecting hole (8).

3. The ceramic riser pipe flange sealing and clamping device according to claim 1, characterized in that, The bottom of the first flange (3) is circular and fixedly connected with several locating bolts (11) arranged at equal intervals.

4. The ceramic riser pipe flange sealing and clamping device according to claim 1, characterized in that, The outer wall of the second flange (4) is fixedly connected with a number of second connecting blocks (7) arranged at equal intervals, and each second connecting block (7) is provided with a lower connecting hole (14) corresponding to the bolt (9).

5. The ceramic riser pipe flange sealing and clamping device according to claim 4, characterized in that, The bolt (9), the first connecting block (6), and the outer ends of the second connecting block (7) are all threaded with a first nut (10).

6. The ceramic riser pipe flange sealing and clamping device according to claim 1, characterized in that, The bottom of the first flange (3) and the top of the second flange (4) are both circularly and equally spaced with four circular holes (15) corresponding to the screws (53) on the sealing structure (5), and the circular holes (15) are threadedly connected to the screws (53).

7. The ceramic riser pipe flange sealing and clamping device according to claim 1, characterized in that, The top of the second flange (4) is circularly and equidistantly provided with several through holes (13) corresponding to the positioning bolts (11), and the positioning bolts (11) and the bottom of the second flange (4) are threaded with second nuts (12).

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