A butterfly valve body sealing mechanism

Abstract

The present invention discloses a sealing mechanism for a butterfly valve body, comprising: a valve body main body, and a sealing assembly is arranged inside the valve body main body. In the present invention, the right end of the valve body main body is the water inlet, and the left end is the water outlet. At this time, the annular butterfly plate is in a closed state. When the annular butterfly plate is driven by the valve stem to open, as the annular butterfly plate rotates, it pushes the second sealing pad and the first sealing pad towards the support plate, and at the same time pushes the fixing plate to move and compresses a plurality of first springs. When the medium flows, it first passes through the support plate, and under the action of the triangular buffer rod, the medium is buffered to reduce the impact force of the medium. Then it flows to the fixing plate, and under the action of the flow splitting plate, the medium is split into multiple streams, and the impact force of the medium is buffered again. With the cooperation of the triangular buffer rod and the flow splitting plate, the impact force of the medium is split and buffered, reducing the wear of the annular sealing ring caused by the impact force and improving the sealing performance.

Description

Technical Field

[0001] The present invention relates to the technical field of butterfly valve bodies, and particularly to a sealing mechanism for a butterfly valve body. Background Art

[0002] 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 low-pressure pipeline medium 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. The valve can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil products, liquid metals, and radioactive media. It mainly functions as a cut-off and throttling in a pipeline. The opening and closing member of a butterfly valve is a disc-shaped butterfly plate that rotates around its own axis in the valve body to achieve opening, closing, or adjustment. The sealing of a butterfly valve directly affects its quality and service life, and as the market's sealing requirements for butterfly valves are increasing day by day.

[0003] In the prior art, such as Chinese Patent No.: CN202972106U, there is disclosed a valve body for a butterfly valve, which includes a base plate part with a valve seat mounting hole and a handle rod part provided with a valve stem mounting hole. It is characterized in that: on the base plate part, a first shoulder hole and a second shoulder hole are symmetrically arranged at both ends of the valve seat mounting hole. These two shoulder holes cooperate with the flanges at both ends of the valve seat to limit the axial movement of the valve seat and meet the fixing requirements of the valve seat. In addition, this structure facilitates the installation and disassembly of the valve seat and has the advantage of being convenient for maintenance.

[0004] However, in the prior art, the sealing mechanism of a butterfly valve body is mainly composed of a valve body sealing surface and a sealing ring installed on its surface. During the use of the butterfly valve body, the side of the sealing ring close to the water inlet will be strongly impacted by the medium. Over time, it is easy to cause the sealing effect of the sealing ring to be affected and the sealing effect to decline, thereby affecting the normal use of the butterfly valve.

[0005] Therefore, we propose a sealing mechanism for a butterfly valve body to solve the problems raised above. Summary of the Invention

[0006] The purpose of the present invention is to provide a sealing mechanism for a butterfly valve body to solve the problem that during the use of the butterfly valve body in the above-mentioned background art, the side of the sealing ring close to the water inlet will be strongly impacted by the medium. Over time, it is easy to cause the sealing effect of the sealing ring to be affected and the sealing effect to decline, thereby affecting the normal use of the butterfly valve.

[0007] To achieve the above object, the present invention provides the following technical solution: A butterfly valve body sealing mechanism, comprising: a valve body main body, a sealing assembly is arranged inside the valve body main body, a connection assembly is arranged on the outer surface of one side of the valve body main body, a fastening structure is arranged inside the connection assembly, an annular butterfly plate is arranged inside the valve body main body, a sealing ring is fixedly connected to the outer surface of the annular butterfly plate, and an annular sealing ring is fixedly connected to the inner wall of the valve body main body near the center;

[0008] The sealing assembly includes a support plate, a triangular buffer rod is fixedly installed inside the support plate, a plurality of first springs are fixedly connected to the outer surface of one side of the support plate, one end of each of the plurality of first springs is fixedly connected to a fixing plate, a flow dividing plate is fixedly installed inside the fixing plate, a first sealing pad is fixedly installed on the outer surface of one side of the fixing plate, and a second sealing pad is fixedly connected to the outer surface of one side of the first sealing pad;

[0009] The fastening structure includes an installation ring, and a plurality of fixing blocks are arranged on the outer surface of one side of the installation ring;

[0010] The connection assembly includes a connection seat, and an installation groove is formed on the outer surface of one side of the connection seat.

[0011] Preferably, a plurality of square grooves are formed on one side inside the installation groove, a plurality of support rods are fixedly installed on one side inside each of the plurality of square grooves, a plurality of card holes are equidistantly formed on the outer surface of the other side of the installation ring, a plurality of second springs are fixedly connected to the outer surface of one side of each of the plurality of fixing blocks, an annular groove is formed on the outer surface of the other side of each of the plurality of fixing blocks, a clamping rod is movably embedded in each of the plurality of annular grooves, a clamping plate is fixedly installed at one end of each of the plurality of clamping rods, and a reinforcing block is movably sleeved on the outer surface of each of the plurality of clamping plates.

[0012] Preferably, two fixing buckles are installed on the outer surface of one side of the annular butterfly plate by screws, a valve rod is arranged inside the valve body main body, the outer surface of the valve rod is fixedly installed inside the two fixing buckles, a rubber groove is formed on the outer surface of the other side of the connection seat, a rubber pad is fixedly connected to the outer surface of one side of the valve body main body, the outer surface of the rubber pad is movably embedded inside the rubber groove, and a plurality of threaded holes are formed on the outer surfaces of both sides of the connection seat.

[0013] Preferably, the plurality of threaded holes are evenly divided into two groups, fastening bolts are threadedly connected inside one group of the threaded holes, anti-slip nuts are threadedly sleeved on the outer surfaces of the plurality of fastening bolts near one end, and the outer surface of the other side of the connection seat is attached to the outer surface of one side of the valve body main body.

[0014] Preferably, a plurality of multi-stage telescopic rods are fixedly installed on one outer surface of the support plate, one ends of the plurality of multi-stage telescopic rods are fixedly installed on the other outer surface of the fixing plate, and a plurality of sliders are fixedly installed on the outer surface of the fixing plate.

[0015] Preferably, a plurality of chutes are formed in the inner wall of the valve body near one side, the outer surfaces of the plurality of sliders are respectively movably embedded in the plurality of chutes, a positioning block is fixedly installed on the inner wall of the valve body near the other side, and the outer surface of the sealing ring is in contact with the inner wall of the annular sealing ring.

[0016] Preferably, the outer surface of the support plate is fixedly connected to the inner wall of the mounting ring, one outer surface of the first gasket near the edge is fitted to one outer surface of the annular sealing ring, and one outer surface of the second gasket is fitted to one outer surface of the sealing ring.

[0017] Preferably, one outer surfaces of the plurality of reinforcing blocks are respectively in contact with the other outer surfaces of the plurality of fixing blocks, the outer surfaces of the plurality of reinforcing blocks are respectively fixedly connected to the inner walls of the plurality of square grooves, and a plurality of sliding holes are formed in the outer surfaces of the plurality of fixing blocks and the plurality of reinforcing blocks near the edge.

[0018] Preferably, the plurality of sliding holes are evenly divided into ten groups, the outer surfaces of the plurality of support rods are respectively movably embedded in each group of sliding holes, and a pull rod is fixedly installed on one outer surface of each of the plurality of clamping plates.

[0019] Preferably, the other outer surfaces of the plurality of clamping plates are respectively in contact with the other outer surface of the mounting ring, the outer surfaces of the plurality of clamping rods are respectively movably embedded in the plurality of clamping holes, one ends of the plurality of second springs are respectively fixedly connected to one side inside the plurality of square grooves, and the outer surface of the mounting ring is movably embedded in the mounting groove.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. The present invention shunts and buffers the medium by setting a sealing assembly to reduce the impact force of the medium. The right end of the valve body is the water inlet, and the left end is the water outlet. The connection assembly, fastening structure, and sealing assembly are all installed at the water inlet of the valve body. At this time, the annular butterfly plate is in a closed state. When the annular butterfly plate is driven by the valve stem to open, as the annular butterfly plate rotates, it pushes the second sealing pad and the first sealing pad towards the support plate, and at the same time pushes the fixing plate to move and compresses a plurality of first springs. When the medium flows, it first passes through the support plate, and under the action of the triangular buffer rod, the medium is buffered to reduce the impact force of the medium. Then it flows to the fixing plate, and under the action of the flow dividing plate, the medium is divided into multiple streams, and the impact force of the medium is buffered again. Under the cooperation of the triangular buffer rod and the flow dividing plate, the impact force of the medium is shunted and buffered to reduce the wear of the annular sealing ring caused by the impact force. When the valve stem drives the annular butterfly plate to close, the plurality of first springs lose the thrust, and under the elastic force of the plurality of first springs, the fixing plate, the first sealing pad, and the second sealing pad are pushed to reset, so that the first sealing pad and the second sealing ring are respectively fitted with the annular sealing ring and the sealing ring, thereby achieving the effect of improving the sealing performance.

[0022] 2. By setting the connection assembly and the fastening structure, it is convenient to disassemble the sealing assembly for maintenance. When the clamping plate is buckled on the outer surface of the mounting ring, the second spring is in a stretched state. The anti-slip threaded nut and the fastening bolt are unscrewed in turn. At this time, the connection seat loses its fixation, and the connection seat and the sealing assembly are disassembled from the water inlet of the valve body. Then, rotate a plurality of clamping plates so that when the clamping plates are in a horizontal state with the clamping holes, the second spring loses its tension, and under the elastic action, the clamping plates are driven to move, so that the clamping plates are embedded into the clamping holes. At this time, the mounting ring loses its fixation, and the sealing assembly and the mounting ring can be slid out from the inside of the connection seat, thus facilitating the staff to maintain or replace the sealing assembly.

[0023] 3. By setting the rubber pad, the sealing performance is improved. When the connection seat is installed at the water inlet of the valve body, the rubber pad just fits into the rubber groove and tightly adheres to the inner wall of the rubber groove, which is beneficial to improving the tightness at the connection between the connection seat and the valve body. When the fixing plate moves, a plurality of sliders slide in the corresponding sliding grooves, which is beneficial to improving the smooth movement of the fixing plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is the front perspective view of a butterfly valve body sealing mechanism of the present invention;

[0025] Figure 2 is the structural sectional perspective view of a butterfly valve body sealing mechanism of the present invention;

[0026] Figure 3 is the structural sectional expanded perspective view of the valve body of a butterfly valve body sealing mechanism of the present invention;

[0027] Figure 4 This is an exploded perspective view of the connection component in the valve body sealing mechanism of a butterfly valve according to the present invention;

[0028] Figure 5 This is an exploded perspective view of a partial structure of the connection seat in the valve body sealing mechanism of a butterfly valve according to the present invention;

[0029] Figure 6 This is an exploded perspective view of the sealing component in the valve body sealing mechanism of a butterfly valve according to the present invention;

[0030] Figure 7 This is an exploded perspective view of the fastening structure in the valve body sealing mechanism of a butterfly valve according to the present invention;

[0031] Figure 8 This is an exploded perspective view of the cross-section of the fixed block in the valve body sealing mechanism of a butterfly valve according to the present invention.

[0032] In the figure: 1, valve body main body; 2, connection component; 201, connection seat; 202, square groove; 203, support rod; 204, threaded hole; 205, fastening bolt; 206, anti-slip nut; 207, installation groove; 208, rubber groove; 3, fastening structure; 301, installation ring; 302, card hole; 303, fixed block; 304, card rod; 305, strengthening block; 306, second spring; 307, annular groove; 308, card plate; 309, pull rod; 310, sliding hole; 4, sealing component; 401, support plate; 402, triangular buffer rod; 403, first spring; 404, fixing plate; 405, flow dividing plate; 406, first sealing pad; 407, second sealing pad; 408, slider; 409, multi-section telescopic rod; 5, valve stem; 6, fixing buckle; 7, sealing ring; 8, positioning block; 9, rubber pad; 10, annular sealing ring; 11, sliding groove; 12, annular butterfly plate. Embodiment

[0033] 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0034] Please refer to Figure 1-8As shown in the figure, the present invention provides a technical solution: a butterfly valve body sealing mechanism, including: a valve body main body 1, a sealing component 4 is arranged inside the valve body main body 1, a connection component 2 is arranged on the outer surface of one side of the valve body main body 1, a fastening structure 3 is arranged inside the connection component 2, an annular butterfly plate 12 is arranged inside the valve body main body 1, a sealing ring 7 is fixedly connected to the outer surface of the annular butterfly plate 12, and an annular sealing ring 10 is fixedly connected to the inner wall of the valve body main body 1 near the center; the sealing component 4 includes a support plate 401, a triangular buffer rod 402 is fixedly installed inside the support plate 401, a plurality of first springs 403 are fixedly connected to the outer surface of one side of the support plate 401, one end of the plurality of first springs 403 is fixedly connected to a fixing plate 404, a flow dividing plate 405 is fixedly installed inside the fixing plate 404, a first sealing pad 406 is fixedly installed on the outer surface of one side of the fixing plate 404, and a second sealing pad 407 is fixedly connected to the outer surface of one side of the first sealing pad 406; the fastening structure 3 includes a mounting ring 301, and a plurality of fixing blocks 303 are arranged on the outer surface of one side of the mounting ring 301; the connection component 2 includes a connection seat 201, and a mounting groove 207 is opened on the outer surface of one side of the connection seat 201.

[0035] According to Figures 4-5 and Figures 7-8 As shown in the figure, a plurality of square grooves 202 are opened on one side inside the mounting groove 207, a plurality of support rods 203 are fixedly installed on one side inside each of the plurality of square grooves 202, a plurality of card holes 302 are equidistantly opened on the outer surface of the other side of the mounting ring 301, a plurality of second springs 306 are fixedly connected to the outer surface of one side of each of the plurality of fixing blocks 303, an annular groove 307 is opened on the outer surface of the other side of each of the plurality of fixing blocks 303, a clamping rod 304 is movably embedded inside each of the plurality of annular grooves 307, a clamping plate 308 is fixedly installed at one end of each of the plurality of clamping rods 304, a reinforcing block 305 is movably sleeved on the outer surface of each of the plurality of clamping plates 308. By arranging the plurality of clamping plates 308 to cross the plurality of card holes 302 respectively, under the elastic pulling force of the plurality of second springs 306, the clamping plate 308 is pulled to buckle on the outer surface of the mounting ring 301. At this time, the plurality of second springs 306 are in a stretched state. Under the action of the reinforcing block 305, the mounting ring 301 is fixed inside the mounting groove 207, thereby fixing the support plate 401 inside the connection seat 201 and preventing the support plate 401 from moving.

[0036] According to Figures 1-5As shown, two fixing buckles 6 are installed on the outer surface of one side of the annular butterfly plate 12 by screws. A valve stem 5 is arranged inside the valve body main body 1. The outer surface of the valve stem 5 is fixedly installed inside the two fixing buckles 6. A rubber groove 208 is formed on the outer surface of the other side of the connecting seat 201. One side outer surface of the valve body main body 1 is fixedly connected with a rubber pad 9. The outer surface of the rubber pad 9 is movably embedded inside the rubber groove 208. A plurality of threaded holes 204 are formed on the outer surfaces of both sides of the connecting seat 201, which is convenient for driving the annular butterfly plate 12 to open or close through the valve stem 5. Under the action of the rubber pad 9, it is beneficial to improve the tightness at the connection between the connecting seat 201 and the valve body main body 1.

[0037] According to Figures 1-5 As shown, the plurality of threaded holes 204 are evenly divided into two groups. One group of threaded holes 204 are all threadedly connected with fastening bolts 205. Anti-slip nuts 206 are threadedly sleeved on the outer surfaces of the plurality of fastening bolts 205 near one end. The outer surface of the other side of the connecting seat 201 is attached to the outer surface of one side of the valve body main body 1, which is convenient for installing the connecting seat 201 and the valve body main body 1 together through the fastening bolts 205 and the anti-slip nuts 206.

[0038] According to Figure 6 As shown, a plurality of multi-stage telescopic rods 409 are fixedly installed on the outer surface of one side of the support plate 401. One end of each of the plurality of multi-stage telescopic rods 409 is fixedly installed on the outer surface of the other side of the fixing plate 404. A plurality of sliders 408 are fixedly installed on the outer surface of the fixing plate 404, which is convenient for increasing the stability of the connection between the support plate 401 and the fixing plate 404 under the action of the plurality of multi-stage telescopic rods 409.

[0039] According to Figures 1-3 and Figure 6 As shown, a plurality of sliding grooves 11 are formed on the inner wall of the valve body main body 1 near one side. The outer surfaces of the plurality of sliders 408 are respectively movably embedded inside the plurality of sliding grooves 11. A positioning block 8 is fixedly installed on the inner wall of the valve body main body 1 near the other side. The outer surface of the sealing ring 7 is in contact with the inner wall of the annular sealing ring 10. When the fixing plate 404 moves, the plurality of sliders 408 slide inside the corresponding sliding grooves 11, which is beneficial to improving the smooth movement of the fixing plate 404. When the annular butterfly plate 12 contacts the positioning block 8, it is beneficial to maintain the maximum medium flow rate.

[0040] According to Figures 2-3 and Figures 6-7 As shown, the outer surface of the support plate 401 is fixedly connected with the inner wall of the mounting ring 301. The outer surface of one side of the first sealing pad 406 near the edge is attached to the outer surface of one side of the annular sealing ring 10. The outer surface of one side of the second sealing pad 407 is attached to the outer surface of one side of the sealing ring 7. Through the first sealing pad 406 and the second sealing pad 407, it is beneficial to improve the sealing performance.

[0041] According to Figures 4-5 and Figures 7-8 As shown, the outer surfaces of one sides of multiple reinforcing blocks 305 are respectively in contact with the outer surfaces of the other sides of multiple fixing blocks 303. The outer surfaces of multiple reinforcing blocks 305 are respectively fixedly connected to the inner walls of multiple square grooves 202. Multiple slide holes 310 are formed in the outer surfaces of multiple fixing blocks 303 and multiple reinforcing blocks 305 near the edges, which facilitates the limitation of the fixing blocks 303 by the reinforcing blocks 305 and prevents the fixing blocks 303 from sliding out of the square grooves 202.

[0042] According to Figures 4-5 and Figure 8 As shown, multiple slide holes 310 are evenly divided into ten groups. The outer surfaces of multiple support rods 203 are respectively movably embedded in each group of slide holes 310. One sides of the outer surfaces of multiple clamping plates 308 are respectively fixedly installed with pull rods 309. Under the action of multiple support rods 203, it is beneficial to improve the stability of the fixing blocks 303 when moving.

[0043] According to Figures 4-5 and Figures 7-8 As shown, the outer surfaces of the other sides of multiple clamping plates 308 are respectively in contact with the outer surfaces of the other sides of the mounting rings 301. The outer surfaces of multiple clamping rods 304 are respectively movably embedded in multiple clamping holes 302. One ends of multiple second springs 306 are respectively fixedly connected to one sides inside multiple square grooves 202. The outer surface of the mounting ring 301 is movably embedded in the mounting groove 207, which facilitates the fixing of the mounting ring 301 inside the mounting groove 207 under the action of the clamping plates 308, the clamping rods 304 and the second springs 306 to prevent movement.

[0044] The effect achieved by the whole mechanism is as follows: In the present invention, the right end of the valve body 1 is the water inlet and the left end is the water outlet. Threaded drill holes are formed on both sides of the valve body 1. The connecting seat 201 is installed at the water inlet of the valve body 1, and then the fastening bolts 205 are sequentially passed through the threaded holes 204 on the left side of the connecting seat 201 and the threaded drill holes at the water inlet of the valve body 1, and then the anti-slip nuts 206 are screwed on for fixed installation. The structures of multiple clamping plates 308 and multiple clamping holes 302 match, such as Figure 7As shown, multiple clamping plates 308 are respectively arranged in a crosswise manner with multiple clamping holes 302. Under the elastic force of multiple second springs 306, the clamping plates 308 are pulled to buckle on the outer surface of the mounting ring 301. At this time, multiple second springs 306 are in a stretched state. Under the action of the reinforcing block 305, the mounting ring 301 is fixed inside the mounting groove 207, thereby fixing the support plate 401 inside the connecting seat 201. The connecting assembly 2, the fastening structure 3, and the sealing assembly 4 are all installed at the water inlet of the valve body 1. The annular butterfly plate 12 is in a closed state at this time. When the annular butterfly plate 12 is driven by the valve stem 5 to open, as the annular butterfly plate 12 rotates, it pushes the second sealing gasket 407 and the first sealing gasket 406 to move towards the support plate 401. At the same time, it pushes the fixed plate 404 to move and squeezes multiple first springs 403. After the annular butterfly plate 12 is opened, the medium can flow. First, it flows to the support plate 401. Under the action of the triangular buffer rod 402, the medium is buffered to reduce the impact force of the medium. Then it flows to the fixed plate 404. Under the action of the flow splitting plate 405, the medium is split into multiple strands, and the impact force of the medium is buffered again. With the cooperation of the triangular buffer rod 402 and the flow splitting plate 405, the impact force of the medium is split and buffered, reducing the wear of the annular sealing ring 10 caused by the impact force, and solving the problem that in the process of using the butterfly valve body, the side of the sealing ring close to the water inlet will be strongly impacted by the medium. Over time, it is easy to cause the sealing effect of the sealing ring to be affected and the sealing effect to decline, thus affecting the normal use of the butterfly valve. When the valve stem 5 drives the annular butterfly plate 12 to close, multiple compressed first springs 403 lose the thrust. Under the elastic force of multiple first springs 403, the fixed plate 404, the first sealing gasket 406, and the second sealing gasket 407 are pushed to reset, so that the first sealing gasket 406 fits on the outer surface of one side of the annular sealing ring 10, and the outer surface of one side of the second sealing gasket 407 fits on the outer surface of one side of the sealing ring 7, thereby achieving the effect of improving the sealing performance. Unscrew the anti-slip nut 206 and the fastening bolt 205 in sequence. At this time, the connecting seat 201 loses its fixation, and the connecting seat 201 and the sealing assembly 4 are disassembled from the water inlet of the valve body 1. Then rotate multiple clamping plates 308 so that when the clamping plates 308 are in a horizontal state with the clamping holes 302, the second springs 306 lose the pulling force. Under the elastic action, the clamping plates 308 are driven to move, and the clamping plates 308 are embedded into the clamping holes 302. At this time, the mounting ring 301 loses its fixation, and the sealing assembly 4 and the mounting ring 301 can be slid out from inside the connecting seat 201, which is convenient for the staff to maintain or replace the sealing assembly 4. When the connecting seat 201 is installed at the water inlet of the valve body 1, the rubber pad 9 just fits into the rubber groove 208 and tightly fits with the inner wall of the rubber groove 208, which is beneficial to improving the tightness of the connection between the connecting seat 201 and the valve body 1. When the fixed plate 404 moves, multiple sliders 408 slide in the corresponding sliding grooves 11, which is beneficial to improving the smooth movement of the fixed plate 404.

[0045] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sealing mechanism for a butterfly valve body, characterized in that, Comprising: A valve body main body (1), inside which a sealing assembly (4) is provided. On one outer surface of the valve body main body (1), a connection assembly (2) is provided. Inside the connection assembly (2), a fastening structure (3) is provided. Inside the valve body main body (1), an annular butterfly plate (12) is provided. On the outer surface of the annular butterfly plate (12), a sealing ring (7) is fixedly connected. On the inner wall of the valve body main body (1) near the center, an annular sealing ring (10) is fixedly connected; The sealing assembly (4) includes a support plate (401), inside which a triangular buffer rod (402) is fixedly installed. On one outer surface of the support plate (401), a plurality of first springs (403) are fixedly connected. One ends of the plurality of first springs (403) are fixedly connected to a fixing plate (404). Inside the fixing plate (404), a flow dividing plate (405) is fixedly installed. On one outer surface of the fixing plate (404), a first sealing pad (406) is fixedly installed. On one outer surface of the first sealing pad (406), a second sealing pad (407) is fixedly connected; The fastening structure (3) includes a mounting ring (301), and on one outer surface of the mounting ring (301), a plurality of fixing blocks (303) are provided; The connection assembly (2) includes a connection seat (201), and on one outer surface of the connection seat (201), a mounting groove (207) is provided; On one side inside the mounting groove (207), a plurality of square grooves (202) are provided. On one side inside each of the plurality of square grooves (202), a plurality of support rods (203) are fixedly installed. On the other outer surface of the mounting ring (301) at equal intervals, a plurality of card holes (302) are provided. On one outer surface of each of the plurality of fixing blocks (303), a plurality of second springs (306) are fixedly connected. On the other outer surface of each of the plurality of fixing blocks (303), an annular groove (307) is provided. Inside each of the plurality of annular grooves (307), a clamping rod (304) is movably embedded. One ends of the plurality of clamping rods (304) are fixedly installed with clamping plates (308). On the outer surfaces of the plurality of clamping plates (308), reinforcing blocks (305) are movably sleeved; On one side outer surface of the annular butterfly plate (12), two fixing buckles (6) are installed by screws. Inside the valve body (1), a valve rod (5) is provided. The outer surface of the valve rod (5) is fixedly installed inside the two fixing buckles (6). On the other side outer surface of the connecting seat (201), a rubber groove (208) is provided. On one side outer surface of the valve body (1), a rubber pad (9) is fixedly connected. The outer surface of the rubber pad (9) is movably embedded inside the rubber groove (208). On both side outer surfaces of the connecting seat (201), a plurality of threaded holes (204) are provided; On one side outer surface of the support plate (401), a plurality of multi-stage telescopic rods (409) are fixedly installed. One end of each of the plurality of multi-stage telescopic rods (409) is fixedly installed on the other side outer surface of the fixing plate (404). On the outer surface of the fixing plate (404), a plurality of sliders (408) are fixedly installed.

2. The butterfly valve body sealing mechanism according to claim 1, characterized in that: The plurality of threaded holes (204) are evenly divided into two groups. Inside the threaded holes (204) of one of the groups, fastening bolts (205) are threadedly connected. On the outer surface near one end of each of the plurality of fastening bolts (205), anti-slip nuts (206) are threadedly sleeved. The other side outer surface of the connecting seat (201) is in contact with the one side outer surface of the valve body (1).

3. The butterfly valve body sealing mechanism according to claim 2, wherein: On the inner wall near one side of the valve body (1), a plurality of chutes (11) are provided. The outer surfaces of the plurality of sliders (408) are respectively movably embedded inside the plurality of chutes (11). On the inner wall near the other side of the valve body (1), a positioning block (8) is fixedly installed. The outer surface of the sealing ring (7) is in contact with the inner wall of the annular sealing ring (10).

4. The butterfly valve body sealing mechanism according to claim 1, characterized in that: The outer surface of the support plate (401) is fixedly connected to the inner wall of the mounting ring (301). On the outer surface near the edge of the first sealing pad (406), it is in contact with the one side outer surface of the annular sealing ring (10). On the one side outer surface of the second sealing pad (407), it is in contact with the one side outer surface of the sealing ring (7).

5. The butterfly valve body sealing mechanism according to claim 1, characterized in that: On the one side outer surface of each of the plurality of reinforcing blocks (305), it is in contact with the other side outer surface of each of the plurality of fixing blocks (303). The outer surfaces of the plurality of reinforcing blocks (305) are respectively fixedly connected to the inner walls of the plurality of square grooves (202). On the outer surfaces near the edge of each of the plurality of fixing blocks (303) and each of the plurality of reinforcing blocks (305), a plurality of sliding holes (310) are provided.

6. The butterfly valve body sealing mechanism according to claim 5, characterized in that: The plurality of sliding holes (310) are evenly divided into ten groups. The outer surfaces of the plurality of support rods (203) are respectively movably embedded inside each group of sliding holes (310). On the one side outer surface of each of the plurality of clamping plates (308) whose outer surfaces are respectively movable, a pull rod (309) is fixedly installed.

7. The butterfly valve body sealing mechanism according to claim 1, characterized in that: The outer surfaces of the other sides of the plurality of card boards (308) are all in contact with the outer surface of the other side of the mounting ring (301). The outer surfaces of the plurality of clamping rods (304) are respectively movably embedded in the interiors of a plurality of clamping holes (302). One ends of the plurality of second springs (306) are respectively fixedly connected to one sides inside a plurality of square grooves (202). The outer surface of the mounting ring (301) is movably embedded in the interior of the mounting groove (207).

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