High-temperature sealing butterfly valve for hot primary air at inlet of coal mill

Abstract

The utility model discloses a coal mill inlet hot primary air high-temperature sealing butterfly valve which comprises a valve body, a disc is installed on the inner wall of the valve body in a rotating mode, a sealing buckle block is fixedly connected to the edge of the side face of the disc, the sealing buckle block and a sealing buckle groove are installed in an inserted mode, and a rotating gear is installed at the upper end of the disc. And one side of the rotating gear is engaged with a transmission gear, one side of the transmission gear is engaged with a driving gear, and the upper end of the driving gear is provided with a rotating disc. According to the coal mill inlet hot primary air high-temperature sealing butterfly valve, double-set sealing can be achieved through the disc, the disc and the limiting check block can be buckled and sealed through the sealing buckling groove and the sealing buckling block, the sealing effect is good and more stable, the disc can be driven to rotate in an engaged linkage mode through the transmission gear, the driving gear and the rotating gear, opening and closing are more convenient, and the sealing effect is better. And the communicating pipe and the valve body can be rapidly and stably installed through the locking bolt, the threaded installation groove and the threaded installation ring, and use is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly valves, in particular to a high-temperature sealed butterfly valve for the hot primary air inlet of a coal mill. Background Technique

[0002] A coal mill is a machine that crushes coal blocks and grinds them into pulverized coal. It is an important auxiliary equipment for a pulverized coal boiler, and a butterfly valve is required for opening and closing control at the inlet air guiding place.

[0003] A butterfly valve, also called a flap valve, is a simple-structured regulating valve. A butterfly valve that can be used for the on-off control of a medium in a low-pressure pipeline refers to a valve in which the closing member (valve flap or butterfly plate) is a disc and rotates around the valve shaft to achieve opening and closing.

[0004] There is a prior CN213541326U, a non-jamming high-sealing high-temperature butterfly valve with good sealing effect. The setting of the valve cover and the valve cover flipping mechanism avoids jamming between the valve cover and the valve body in a high-temperature state. However, there are deficiencies. The existing equipment has a single closed structure, an unstable sealing structure, inconvenient opening and closing operations, and inconvenient installation and use. Therefore, a high-temperature sealed butterfly valve for the hot primary air inlet of a coal mill is needed to solve the above problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide a high-temperature sealed butterfly valve for the hot primary air inlet of a coal mill to solve the problems of the non-jamming high-sealing high-temperature butterfly valve mentioned in the above background technique, such as a single closed structure, an unstable sealing structure, inconvenient opening and closing operations, and inconvenient installation and use.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A high-temperature sealed butterfly valve for the hot primary air inlet of a coal mill, including a valve body. A communicating pipe is connected and installed on one side of the valve body. A turntable is installed at the upper end of the valve body. Communicating interfaces are installed on both sides of the valve body. A threaded installation groove is opened on the inner wall of the communicating interface. A threaded installation ring is inserted and installed in the inner wall of the threaded installation groove. One end of the threaded installation ring is communicated with the communicating pipe. A locking bolt is inserted and installed on the outer wall edge of the communicating interface. A limiting stop block is fitted and installed on the inner wall of the valve body. A sealing buckle groove is opened on one side of the limiting stop block. A disc is rotatably installed on the inner wall of the valve body. A sealing buckle block is fixedly connected to the side edge of the disc. The sealing buckle block is inserted and installed with the sealing buckle groove. A rotating gear is installed at the upper end of the disc. A transmission gear is meshed and installed on one side of the rotating gear. A driving gear is meshed and installed on one side of the transmission gear. A turntable is installed at the upper end of the driving gear. A protective cover is installed on the outer walls of the transmission gear, the driving gear and the rotating gear.

[0007] Preferably, the valve body is rotationally spliced and communicated with the communicating pipe through the threaded installation groove and the threaded installation ring, and the inner wall of the threaded installation groove and the outer wall of the threaded installation ring are both wrapped with rubber materials.

[0008] Preferably, the connecting pipe is fixedly installed by bolt clamping with the connecting interface through locking bolts, and the locking bolts are distributed in a circular position on the connecting interface.

[0009] Preferably, the protective cover is made of metal, and the protective cover is installed in a closed manner on the outer walls of the transmission gear, the driving gear, and the rotating gear.

[0010] Preferably, the disc plates are distributed in two groups in parallel on the inner wall of the valve body, and the disc plates are rotationally connected in a meshing and linkage manner with the valve body through the transmission gear, the driving gear, and the rotating gear. Both the disc plates and the valve body are made of superalloy materials.

[0011] Preferably, the disc plates are connected in a snap-sealing manner with the limit stop blocks through the sealing buckle grooves and the sealing buckle blocks.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows: The high-temperature sealing butterfly valve for the primary hot air inlet of the coal mill can be closed by two groups of disc plates, and the disc plates can be snap-sealed with the limit stop blocks through the sealing buckle grooves and the sealing buckle blocks, with good sealing effect and higher stability. Moreover, the disc plates can be driven to rotate in a meshing and linkage manner through the transmission gear, the driving gear, and the rotating gear, making the opening and closing more convenient. In addition, the connecting pipe can be quickly and stably installed on the valve body through the locking bolts, the threaded installation grooves, and the threaded installation rings, which is convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is the front view of the high-temperature sealing butterfly valve for the primary hot air inlet of the coal mill of the present utility model;

[0014] Figure 2 is the schematic diagram of the internal structure of the high-temperature sealing butterfly valve for the primary hot air inlet of the coal mill of the present utility model;

[0015] Figure 3 is the schematic diagram of the internal structure of the high-temperature sealing butterfly valve for the primary hot air inlet of the coal mill of the present utility model when viewed from above;

[0016] Figure 4 is the high-temperature sealing butterfly valve for the primary hot air inlet of the coal mill of the present utility model Figure 2 the enlarged view at position A in;

[0017] Figure 5 is the high-temperature sealing butterfly valve for the primary hot air inlet of the coal mill of the present utility model Figure 2 the enlarged view at position B in;

[0018] Figure 6 is the high-temperature sealing butterfly valve for the primary hot air inlet of the coal mill of the present utility model Figure 3 the enlarged view at position C in.

[0019] In the figure: 1. Valve body, 2. Connecting pipe, 3. Protective cover, 4. Turntable, 5. Disc, 6. Connecting interface, 7. Locking bolt, 8. Threaded installation groove, 9. Threaded installation ring, 10. Transmission gear, 11. Driving gear, 12. Rotating gear, 13. Limit stop block, 14. Sealing buckle groove, 15. Sealing buckle block. Specific implementation mode

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0021] Please refer to Figures 1-6 , the present invention provides a technical solution: a high-temperature seal butterfly valve for the hot primary air inlet of a coal mill, including a valve body 1, a connecting pipe 2, a protective cover 3, a turntable 4, a disc 5, a connecting interface 6, a locking bolt 7, a threaded installation groove 8, a threaded installation ring 9, a transmission gear 10, a driving gear 11, a rotating gear 12, a limit stop block 13, a sealing buckle groove 14 and a sealing buckle block 15. A connecting pipe 2 is connected and installed on one side of the valve body 1, and a turntable 4 is installed at the upper end of the valve body 1. The valve body 1 is rotationally spliced and connected with the connecting pipe 2 through the threaded installation groove 8 and the threaded installation ring 9, and the inner wall of the threaded installation groove 8 and the outer wall of the threaded installation ring 9 are both wrapped with rubber material, so that the valve body 1 can be conveniently and quickly rotationally sealed and installed with the connecting pipe 2.

[0022] The connecting pipe 2 is fixedly installed with the connecting interface 6 by bolt clamping through the locking bolt 7, and the locking bolts 7 are distributed in a circular position on the connecting interface 6, so that the connecting pipe 2 can be assisted in fixing and the installation is stable. Connecting interfaces 6 are installed on both sides of the valve body 1, and threaded installation grooves 8 are opened on the inner walls of the connecting interfaces 6. A threaded installation ring 9 is inserted and installed on the inner wall of the threaded installation groove 8, and one end of the threaded installation ring 9 is communicated with the connecting pipe 2. A locking bolt 7 is inserted and installed at the edge of the outer wall of the connecting interface 6. A limit stop block 13 is fitted and installed on the inner wall of the valve body 1, and a sealing buckle groove 14 is opened on one side of the limit stop block 13. A disc 5 is rotationally installed on the inner wall of the valve body 1, and a sealing buckle block 15 is fixedly connected to the side edge of the disc 5. The discs 5 are distributed in two groups in parallel on the inner wall of the valve body 1, and the discs 5 are rotationally connected with the valve body 1 through the transmission gear 10, the driving gear 11 and the rotating gear 12 in a meshing linkage manner. Both the disc 5 and the valve body 1 are made of high-temperature alloy material, so that the discs 5 can be distributed in two groups and can be rotationally connected in a meshing linkage manner, and the opening and closing are convenient.

[0023] The disc 5 is connected to the limit block 13 in a buckled and sealed manner through the sealing buckle groove 14 and the sealing buckle block 15, so that the disc 5 can be buckled and sealed, and the closing effect is better. The sealing buckle block 15 is inserted into the sealing buckle groove 14 and installed. A rotating gear 12 is installed on the upper end of the disc 5, and a transmission gear 10 is meshed and installed on one side of the rotating gear 12. A drive gear 11 is meshed and installed on one side of the transmission gear 10, and a turntable 4 is installed on the upper end of the drive gear 11. A protective cover 3 is installed on the outer walls of the transmission gear 10, the drive gear 11 and the rotating gear 12. The protective cover 3 is made of metal, and the protective cover 3 is installed in a closed cover with the outer walls of the transmission gear 10, the drive gear 11 and the rotating gear 12, so that the protective cover 3 can cover the transmission gear 10, the drive gear 11 and the rotating gear 12, thereby achieving a good protection effect and avoiding damage.

[0024] Working principle: When using the high-temperature sealing butterfly valve for hot primary air at the inlet of the coal mill, first rotate and splice the valve body 1 threaded mounting groove 8, the threaded mounting ring 9 and the connecting pipe 2 of the device, and then rotate and tighten the locking bolt 7 to clamp and fix the connecting pipe 2, and then use it to guide the air. When it needs to be closed, the disc 5 can be driven to rotate and close through the transmission gear 10, the drive gear 11, and the rotating gear 12, and then the sealing buckle groove 14, the sealing buckle block 15 and the limit block 13 are buckled and installed to form a sealed closure. When it is impacted, the transmission gear 10, the drive gear 11, and the rotating gear 12 can be covered and protected by the protective cover 3. This is the use process of the high-temperature sealing butterfly valve for hot primary air at the inlet of the coal mill.

[0025] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. High-temperature sealing butterfly valve for hot primary air at the inlet of coal mill, including valve body (1), a connecting pipe (2) is connected and installed on one side of the valve body (1), and a turntable (4) is installed at the upper end of the valve body (1), characterized in that: On both sides of the valve body (1), communication interfaces (6) are installed, and threaded installation grooves (8) are provided on the inner wall of the communication interfaces (6). A threaded installation ring (9) is inserted and installed on the inner wall of the threaded installation groove (8), and one end of the threaded installation ring (9) is communicated with the communication pipe (2). A locking bolt (7) is inserted and installed on the outer wall edge of the communication interface (6). A limiting stop block (13) is fitted and installed on the inner wall of the valve body (1), and a sealing buckle groove (14) is provided on one side of the limiting stop block (13). A disc (5) is rotatably installed on the inner wall of the valve body (1), and a sealing buckle block (15) is fixedly connected to the side edge of the disc (5). The sealing buckle block (15) is inserted and installed with the sealing buckle groove (14). A rotating gear (12) is installed on the upper end of the disc (5), and a transmission gear (10) is meshed and installed on one side of the rotating gear (12). A driving gear (11) is meshed and installed on one side of the transmission gear (10), and a turntable (4) is installed on the upper end of the driving gear (11). A protective cover (3) is installed on the outer walls of the transmission gear (10), the driving gear (11), and the rotating gear (12).

2. The high-temperature sealed butterfly valve for the primary hot air at the inlet of the coal mill according to claim 1, characterized in that: The valve body (1) is rotationally spliced and communicated with the communication pipe (2) through the threaded installation groove (8) and the threaded installation ring (9), and the inner wall of the threaded installation groove (8) and the outer wall of the threaded installation ring (9) are both wrapped with rubber material.

3. The high-temperature seal butterfly valve for the primary hot air at the inlet of the coal mill according to claim 2, characterized in that: The communication pipe (2) is bolt-clamped and fixed to the communication interface (6) through the locking bolt (7), and the locking bolts (7) are distributed in a circular position on the communication interface (6).

4. The high-temperature sealed butterfly valve for the primary hot air at the inlet of the coal mill according to claim 3, characterized in that: The protective cover (3) is made of metal material, and the protective cover (3) is hermetically covered and installed on the outer walls of the transmission gear (10), the driving gear (11), and the rotating gear (12).

5. The high-temperature sealed butterfly valve for the primary hot air at the inlet of the coal mill according to claim 4, characterized in that: The discs (5) are distributed in two groups in parallel on the inner wall of the valve body (1), and the discs (5) are rotationally connected to the valve body (1) in a meshing and linkage manner through the transmission gear (10), the driving gear (11), and the rotating gear (12). Both the discs (5) and the valve body (1) are made of superalloy material.

6. The high-temperature sealed butterfly valve for the primary hot air at the inlet of the coal mill according to claim 5, characterized in that: The disc (5) is buckled and sealed with the limiting stop block (13) through the sealing buckle groove (14) and the sealing buckle block (15).

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