High-sealing butterfly valve

Abstract

The invention relates to the field of butterfly valves, in particular to a high-sealing butterfly valve which comprises a valve body main pipe, two round seats are symmetrically fixed to the outer side of the middle of the valve body main pipe, middle shafts are rotationally arranged in the two round seats, a round plate is fixed between the two middle shafts, the round plate can rotate in the valve body main pipe through the middle shafts, and T-shaped ring grooves are formed in the two side faces of the round plate. The two ends of the valve body main pipe are connected with extending pipes through threads, inner sleeves are arranged in the two extending pipes in a sealed and sliding mode, top rings are fixed to the ends, close to the center shaft, of the two inner sleeves, springs are arranged between the two top rings and the two inner sleeves, the top rings move towards the center shaft direction, and when the circular plate and the valve body main pipe are coaxial, the circular plate and the valve body main pipe are coaxial. And the two T-shaped sealing rings are respectively jacked tightly, so that the formed butterfly valve is sealed and closed. The sealing performance is good.

Description

Technical Field

[0001] The invention relates to the field of butterfly valves, in particular to a high-sealing butterfly valve. Background Art

[0002] Butterfly valve, also called flap valve, is a simple regulating valve that can be used for the on-off control of low-pressure pipeline media. Butterfly valve refers to a valve whose closing part (valve disc or butterfly plate) is a disc that rotates around the valve axis to achieve opening and closing. Butterfly valve can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. It mainly plays the role of cutting off and throttling in pipelines.

[0003] The opening and closing part of the butterfly valve is a disc-shaped butterfly plate, which rotates around its own axis in the valve body to achieve the purpose of opening, closing or regulating. When the butterfly valve is closed, most of the existing butterfly valves are sealed by the edge of the disc-shaped butterfly plate contacting the inner wall of the valve body pipe, which has poor sealing performance and is prone to leakage. Therefore, a butterfly valve with high sealing performance is needed. Summary of the invention

[0004] The purpose of the present invention is to provide a high-sealing butterfly valve with good sealing performance.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] A high-sealing butterfly valve comprises a valve body main pipe, wherein two round seats are symmetrically fixed on the outer side of the middle part of the valve body main pipe, a central axis is rotated in each of the two round seats, a circular plate is fixed between the two central axes and can rotate in the valve body main pipe through the central axis, T-shaped ring grooves are arranged on both sides of the circular plate, T-shaped sealing rings are installed in the two T-shaped ring grooves, extension pipes are connected to both ends of the valve body main pipe by threads, inner sleeves are sealingly slid in the two extension pipes, top rings are fixed to the two inner sleeves near the ends of the central axis, springs are arranged between the two top rings and the two inner sleeves to move the top rings toward the central axis, and when the circular plate is coaxial with the valve body main pipe, the two T-shaped sealing rings are respectively pressed tightly to form a sealed and closed butterfly valve.

[0007] The outer side of the inner sleeve is provided with a plurality of annular grooves for accommodating sealing rings.

[0008] The inner sleeve is provided with a chamfer at the end away from the top ring.

[0009] The outer surface of the extension tube is sleeved with a nut sleeve.

[0010] Both side surfaces of the circular plate are coaxially provided with circular grooves, and the inner diameter of the circular groove is the same as the inner diameter of the inner sleeve.

[0011] A dial plate is vertically fixed to one of the central axes away from the circular plate end, and is used to control the opening or closing of the butterfly valve.

[0012] A plurality of tooth grooves are evenly arranged on the circumference of the round seat on the same side of the shift plate, a control plate is slidably passed through the shift plate, a tooth is arranged on the control plate near the main pipe end of the valve body, a tension spring is arranged between the control plate and the central axis, so that the tooth is inserted into one of the tooth grooves to lock the state of the butterfly valve.

[0013] A ring groove is provided in the middle of the inner wall of the main pipe of the valve body, and mounting grooves I are provided at both ends of the ring groove. Two mounting grooves II are provided on the ring groove, and the two mounting grooves II are symmetrically arranged about the central axis. Mounting rings I are fixedly installed in the two mounting grooves I, and mounting rings II are fixedly installed in the two mounting grooves II. An elastic rubber membrane is installed between the mounting rings I and II on the same side, and a filler is filled between the elastic rubber membrane and the inner wall of the ring groove.

[0014] A protective sleeve is fixed on the outer end of the top ring to isolate the elastic rubber membrane from the spring.

[0015] Two filling nozzles for adding fillers into the elastic rubber membrane are fixedly mounted on the side of the main pipe of the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of a high sealing butterfly valve;

[0017] Figure 2 This is a schematic diagram of the cross-sectional structure of the high-sealing butterfly valve when it is closed;

[0018] Figure 3 yes Figure 2 A schematic diagram of the structure partially enlarged at V;

[0019] Figure 4 This is a schematic diagram of the cross-sectional structure of the high-sealing butterfly valve when it is fully opened;

[0020] Figure 5 yes Figure 4 A schematic diagram of the structure partially enlarged at W;

[0021] Figure 6 It is a schematic diagram of the cross-sectional structure of the valve body main pipe;

[0022] Figure 7 It is a schematic diagram of the cross-sectional structure of a circular plate;

[0023] Figure 8 It is a schematic diagram of the cross-sectional structure of a T-shaped sealing ring;

[0024] Fig. 9 It is a schematic diagram of the structure of the extension tube;

[0025] Fig.10 It is a schematic diagram of the cross-sectional structure of the inner sleeve;

[0026] Fig.11 It is a schematic diagram of the structure of the mounting ring I, mounting ring II, and elastic rubber membrane;

[0027] Fig.12 It is a structural diagram of the gear and control board.

[0028] In the figure:

[0029] Valve body main pipe 101; round seat 102; annular groove 103; mounting groove I 104; mounting groove II 105;

[0030] Circular plate 201; central axis 202; shift plate 203; T-shaped ring groove 204; T-shaped sealing ring 205;

[0031] Extension tube 301; nut sleeve 302;

[0032] Inner sleeve 401; top ring 402; spring 403; protective sleeve 404;

[0033] Mounting ring I 501; mounting ring II 502; elastic rubber membrane 503; filling nozzle 504;

[0034] Insert gear 601; control plate 602; tension spring 603. DETAILED DESCRIPTION

[0035] like Figure 1-12 As shown, the high sealing butterfly valve is described in detail:

[0036] A high-sealing butterfly valve comprises a valve body main pipe 101, two round seats 102 are symmetrically fixed on the outer side of the middle of the valve body main pipe 101, a central shaft 202 is rotated in the two round seats 102, a circular plate 201 is fixed between the two central shafts 202, and can be rotated in the valve body main pipe 101 through the central shaft 202, two sides of the circular plate 201 are provided with T-shaped ring grooves 204, and T-shaped sealing rings 205 are installed in the two T-shaped ring grooves 204. Both ends are connected with extension pipes 301 through threads, and inner sleeves 401 are sealingly slidably arranged inside the two extension pipes 301. Top rings 402 are fixed to the ends of the two inner sleeves 401 close to the central axis 202. Springs 403 are arranged between the two top rings 402 and the two inner sleeves 401 to make the top rings 402 move toward the central axis 202 and tighten the two T-shaped sealing rings 205 respectively when the circular plate 201 is coaxial with the valve body main pipe 101, so that the butterfly valve is sealed and closed.

[0037] The end of the extension tube 301 close to the valve body main tube 101 is inserted into the valve body main tube 101, and the two are connected and sealed by threads. The end of the extension tube 301 away from the valve body main tube 101 is provided with threads on the surface for butterfly valve installation. At the same time, a nut sleeve 302 is sleeved on the outer surface of the extension tube 301, so that the extension tube 301 can be screwed with a wrench to complete the threaded installation and fixation of the extension tube 301.

[0038] Moreover, the inner wall diameter of the extension tube 301 is smaller than the inner wall diameter of the valve body main tube 101, so that the spring 403 can be easily sleeved on the inner sleeve 401, with one end pressing against the end surface of the extension tube 301 and the other end pressing against the top ring 402, so that the top ring 402 moves closer to the center axis 202;

[0039] When in use, the butterfly valve is fixed to the pipeline through the threaded connection at the outer end of the extension tube 301. The fluid enters through one end of the extension tube 301 and flows into the inner sleeve 401 on that side. When the butterfly valve is opened, the fluid passes through the inner sleeve 401 and passes through the circular plate 201 to flow into the other inner sleeve 401, and then flows out through the other extension tube 301. When the butterfly valve is closed, since the circular plate 201 is coaxial with the valve body main pipe 101 at this time, the elastic force of the spring 403 will push the top ring 402 to press against the T-shaped sealing ring 205, thereby forming a seal between the top ring 402 and the circular plate 201. The fluid enters the inner sleeve When the fluid flows from the inner portion of the valve body 101 to the circular plate 201, it will be blocked by the T-shaped sealing ring 205, thus forming a sealed closure of the butterfly valve. Even if the fluid passes through the T-shaped sealing ring 205 and enters the valve body main pipe 101, it will flow to the other side of the circular plate 201, but it still needs to pass through another tightly pressed T-shaped sealing ring 205 before leakage occurs. Moreover, at this time, the fluid passing through the first T-shaped sealing ring 205 will lose its high pressure, making it even more difficult to pass through the second T-shaped sealing ring 205, thereby forming a graded seal of the two T-shaped sealing rings 205, thereby achieving the purpose of high sealing of the butterfly valve.

[0040] Further:

[0041] The outer wall of the inner sleeve 401 and the extension tube 301 slide in cooperation, and the outer side of the inner sleeve 401 is provided with a plurality of annular grooves for placing sealing rings; thus, a plurality of sealing rings are installed side by side between the inner sleeve 401 and the extension tube 301 to form a seal between the inner sleeve 401 and the extension tube 301; at the same time, a plurality of sealing rings are also installed side by side between the central axis 202 and the round seat 102 to perform sealing, thereby effectively preventing the fluid from entering the valve body main pipe 101 and causing leakage of the valve body main pipe 101.

[0042] The inner sleeve 401 is chamfered at the end away from the top ring 402 to facilitate the fluid to enter the extension tube 301 and flow quickly into the inner sleeve 401 on that side.

[0043] Further:

[0044] Circular grooves are coaxially disposed on both sides of the circular plate 201 , and the inner diameter of the circular groove is the same as the inner diameter of the inner sleeve 401 .

[0045] When the butterfly valve is closed, the fluid will vertically impact the side of the circular plate 201, and after being blocked by the side of the circular plate 201, it will diverge circumferentially and then impact the T-shaped sealing ring 205 between the side and the top ring 402. Through the setting of the circular groove, the fluid will enter the circular groove and impact the side of the circular groove, thereby reducing the risk of leakage.

[0046] like Figure 6 , 7, 12 as shown:

[0047] A shift plate 203 is vertically fixed to one end of the central axis 202 away from the circular plate 201 for controlling the butterfly valve to open or close.

[0048] When the butterfly valve is controlled to be opened or closed, the dial plate 203 is directly rotated to drive the circular plate 201 to rotate through the central axis 202, and then the top ring 402 is squeezed through the edge of the circular plate 201, so that the top rings 402 overcome the elastic force of the spring 403 and move away from each other until the circular plate 201 rotates 90 degrees, and the two top rings 402 are symmetrically pressed against the two sides of the circular plate 201. At this time, the butterfly valve is fully opened;

[0049] Further:

[0050] The round seat 102 on the same side of the shift plate 203 is evenly provided with a plurality of tooth grooves in the circumferential direction, and a control plate 602 is slidably passed through the shift plate 203. The control plate 602 is provided with a tooth 601 near the end of the valve body main pipe 101, and a tension spring 603 is provided between the control plate 602 and the central axis 202, so that the tooth 601 is inserted into one of the tooth grooves to lock the state of the butterfly valve.

[0051] When the flow needs to be controlled by the butterfly valve, the circular plate 201 needs to be rotated to a different angle and locked at this angle state. Thus, the insert tooth 601 is inserted into the corresponding tooth groove to lock the butterfly valve in this state. When it needs to be adjusted again, the dial plate 203 is held with one hand, and the control plate 602 is hooked back with the thumb, so that the control plate 602 overcomes the tension of the tension spring 603, and the insert tooth 601 slides out of the tooth groove, so that the dial plate 203 can be pushed to rotate, and after rotating to a suitable position, the control plate 602 can be released.

[0052] like Figure 3 ,5,6,10,11 as shown:

[0053] An annular groove 103 is provided in the middle of the inner wall of the valve body main pipe 101, and mounting grooves I 104 are provided at both ends of the annular groove 103. Two mounting grooves II 105 are provided on the annular groove 103, and the two mounting grooves II 105 are symmetrically arranged about the central axis 202. Mounting rings I 501 are fixedly installed in the two mounting grooves I 104, and mounting rings II 502 are fixedly installed in the two mounting grooves II 105. An elastic rubber membrane 503 is installed between the mounting rings I 501 and II 502 on the same side, and a filler is filled between the elastic rubber membrane 503 and the inner wall of the annular groove 103.

[0054] A protective sleeve 404 is fixed to the outer end of the top ring 402 for isolating the elastic rubber membrane 503 from the spring 403 .

[0055] Two filling nozzles 504 for adding fillers into the elastic rubber membrane 503 are fixedly mounted on the side of the valve body main pipe 101 .

[0056] When the butterfly valve is closed, the top ring 402 and the protective sleeve 404 squeeze the elastic rubber membrane 503, causing the filler in the elastic rubber membrane 503 to flow toward the central axis 202, thereby squeezing the elastic rubber membrane 503 to deform, and then pressing it against the outer ring surface of the circular plate 201, thereby forming a seal on the valve body again. After the fluid passes through the first T-shaped sealing ring 205, it also needs to pass through the elastic rubber membrane 503 and the outer ring surface of the circular plate 201 before entering the valve body main pipe 101, and then needs to pass through the elastic rubber membrane 503 on the other side and the outer ring surface of the circular plate 201 again, and finally pass through the second T-shaped sealing ring 205 before it can leak, further achieving the purpose of high sealing of the butterfly valve.

[0057] When the butterfly valve is opened, the top ring 402 and the protective sleeve 404 will not squeeze the elastic rubber membrane 503, and the elastic rubber membrane 503 is in a state of naturally approaching the inner wall of the valve body main pipe 101, ensuring that the butterfly valve is in a flow-open state.

[0058] The protective sleeve 404 has the effects of squeezing the elastic rubber membrane 503 and isolating the elastic rubber membrane 503 from contacting the spring 403, thereby causing the elastic rubber membrane 503 to be damaged;

[0059] Filler can be added into the elastic rubber membrane 503 through the filling nozzle 504 , and the filler can be water, air, etc.

[0060] Among them, the elastic rubber membrane 503 is ring-shaped, and its two ends are fixedly connected to the mounting ring I 501 and the mounting ring II 502 respectively, and are fixedly connected to the mounting groove I 104 and the mounting groove II 105 through the mounting ring I 501 and the mounting ring II 502 respectively, so that an annular cavity is formed between the elastic rubber membrane 503 and the inner wall of the annular groove 103 for containing fillers.

Claims

1. A high sealing butterfly valve, characterized in that: The invention comprises a valve body main pipe (101), wherein two round seats (102) are symmetrically fixed on the outer side of the middle part of the valve body main pipe (101), a central shaft (202) is rotatable in the two round seats (102), a circular plate (201) is fixed between the two central shafts (202) and can be rotated in the valve body main pipe (101) through the central shaft (202), two side surfaces of the circular plate (201) are provided with T-shaped ring grooves (204), two T-shaped sealing rings (205) are installed in the two T-shaped ring grooves (204), and both ends of the valve body main pipe (101) are An extension tube (301) is connected by threads, and an inner sleeve (401) is sealingly slidably disposed inside the two extension tubes (301). Top rings (402) are fixed to the ends of the two inner sleeves (401) close to the middle axis (202). Springs (403) are disposed between the two top rings (402) and the two inner sleeves (401) to enable the top rings (402) to move toward the middle axis (202) and to respectively press against two T-shaped sealing rings (205) when the circular plate (201) is coaxial with the valve body main pipe (101), thereby forming a sealed and closed butterfly valve.

2. A high sealing butterfly valve according to claim 1, characterized in that: The outer side of the inner sleeve (401) is provided with a plurality of annular grooves for accommodating sealing rings.

3. A high sealing butterfly valve according to claim 1, characterized in that: The inner sleeve (401) is provided with a chamfer at the end away from the top ring (402).

4. A high sealing butterfly valve according to claim 1, characterized in that: The outer surface of the extension tube (301) is sleeved with a nut sleeve (302).

5. A high sealing butterfly valve according to claim 1, characterized in that: Circular grooves are coaxially arranged on both side surfaces of the circular plate (201), and the inner diameter of the circular groove is the same as the inner diameter of the inner sleeve (401).

6. A high sealing butterfly valve according to claim 1, characterized in that: A shift plate (203) is vertically fixed to one end of the central shaft (202) away from the circular plate (201) for controlling the butterfly valve to open or close.

7. A high sealing butterfly valve according to claim 6, characterized in that: The round seat (102) on the same side of the shifting plate (203) is evenly provided with a plurality of tooth grooves in the circumferential direction. A control plate (602) is slidably passed through the shifting plate (203). The control plate (602) is provided with a tooth insert (601) at the end close to the valve body main pipe (101). A tension spring (603) is provided between the control plate (602) and the central axis (202), so that the tooth insert (601) is inserted into one of the tooth grooves to lock the state of the butterfly valve.

8. A high sealing butterfly valve according to claim 1, characterized in that: An annular groove (103) is provided in the middle of the inner wall of the valve body main pipe (101), and mounting grooves I (104) are provided at both ends of the annular groove (103). Two mounting grooves II (105) are provided on the annular groove (103), and the two mounting grooves II (105) are symmetrically arranged about the central axis (202). Mounting rings I (501) are fixedly installed in the two mounting grooves I (104), and mounting rings II (502) are fixedly installed in the two mounting grooves II (105). An elastic rubber membrane (503) is installed between the mounting rings I (501) and II (502) on the same side, and a filler is filled between the elastic rubber membrane (503) and the inner wall of the annular groove (103).

9. A high sealing butterfly valve according to claim 8, characterized in that: A protective sleeve (404) is fixed to the outer end of the top ring (402) for isolating the elastic rubber membrane (503) from the spring (403).

10. A high sealing butterfly valve according to claim 8, characterized in that: Two filling nozzles (504) for adding fillers into the elastic rubber membrane (503) are fixedly mounted on the side of the valve body main pipe (101).

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