Double-sealing type three-eccentric center butterfly valve

Abstract

The utility model relates to the field of sealing valves, and discloses a double-sealing type three-eccentric center butterfly valve which comprises a valve body, and an anti-vibration mechanism is arranged at the bottom of the valve body. The anti-seismic mechanism comprises a box body, four hinge frames and two supporting rods, a four-hole corner plate is fixedly connected to the bottom of the box body, a fixing plate is arranged on the top wall of the interior of the box body, the bottom of the valve body is in threaded connection to the top wall of the fixing plate, and first connecting blocks are rotationally connected to the interiors of the four hinge frames. By means of the anti-seismic mechanism, the problems that leakage or out-of-control of media in a pipeline system is possibly caused, abrasion and damage of valve parts are caused, and the service life of the valve is shortened can be solved, the bottom of the valve body is fixed to the fixing plate, and when vertical shaking and vibration are generated, the anti-seismic mechanism is fixed to the bottom of the valve body. Therefore, the overall stability of the valve is effectively improved, and the service life of the valve is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of sealing valves, in particular to a double-sealing three-eccentric butterfly valve. Background Art

[0002] A butterfly valve, also called a flap valve, is a simple regulating valve that can be used for the on-off control of low-pressure pipeline media. A butterfly valve is a valve whose closing member (valve disc or butterfly plate) is a disc that rotates around the valve axis 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, liquid metal and radioactive media. It mainly plays the role of cutting off and throttling on the pipeline.

[0003] The triple eccentricity of the butterfly valve means that the rotation axis of the valve disc, the sealing axis of the valve seat and the central axis of the valve body are all offset to a certain extent. This design reduces the friction between the valve disc and the valve seat, reduces the operating torque during opening and closing, and makes the valve have better control accuracy and longer service life. In the existing butterfly valve device, most butterfly valves may cause leakage or loss of control of the medium in the pipeline system due to external collision or excessive internal pressure during use, resulting in wear and damage to valve parts and shortening the service life of the valve. In addition, the sealing performance of the butterfly valve may not be able to effectively provide sufficient sealing performance after long-term use, and leakage problems are prone to occur under high pressure or high temperature conditions. This may threaten the safety and reliability of the pipeline system. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art. The utility model provides a method to improve the prior art, which may cause leakage or loss of control of the medium in the pipeline system, cause wear and damage to valve parts, shorten the service life of the valve, and may not effectively provide sufficient sealing performance. Under high pressure or high temperature conditions, leakage problems are likely to occur. This may threaten the safety and reliability of the pipeline system.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a double-seal type three-eccentric butterfly valve, comprising a valve body, wherein a seismic resistance mechanism is provided at the bottom of the valve body;

[0006] The anti-seismic mechanism comprises: a box body, four articulated frames and two support rods, the bottom of the box body is fixedly connected with a four-hole angle plate, the inner top wall of the box body is provided with a fixing plate, the bottom of the valve body is threadedly connected to the top wall of the fixing plate, the insides of the four articulated frames are rotatably connected with a first connecting block, the other sides of the four first connecting blocks are rotatably connected with a triangular block, the bottoms of the four triangular blocks are fixedly connected with a sleeve, the four sleeves are slidably connected to the outsides of the two support rods, the left and right ends of the two support rods are fixedly connected to the inside of the box body, the outsides of the two support rods are provided with a first spring, the two ends of the two first springs are fixedly connected to one end of the two sleeves, the bottom of the fixing plate is fixedly connected with an outer sleeve, the insides of the four outer sleeves are slidably connected with an inner sleeve, the bottoms of the four inner sleeves are fixedly connected to the bottom wall of the inside of the box body, and the outsides of the four inner sleeves are provided with a second spring.

[0007] Furthermore, the top walls of the four articulated frames are fixedly connected to the bottom wall of the fixed plate, the top of the valve body is fixedly connected to a bracket, the top of the bracket is fixedly connected to a connecting column, and the top ends of the four connecting columns are fixedly connected to a fixing ring.

[0008] Furthermore, the valve body is rotatably connected to a valve stem inside, the bracket is fixedly connected to an O-ring inside, the O-ring is rotatably connected to the outside of the valve stem inside, and the top end of the valve stem is rotatably connected to a turbine.

[0009] Furthermore, a sealing ring is fixedly connected to the inner front side wall of the valve body, a butterfly is arranged inside the valve body, and the rear side walls of the two butterfly plates are fixedly connected to a second connecting block.

[0010] Furthermore, an upper sleeve is fixedly connected to the other side of the upper four second connecting blocks, and a lower sleeve is fixedly connected to the other side of the lower four second connecting blocks. The front butterfly is arranged corresponding to the sealing ring, and a sealing ring is fixedly connected to the outer side of the middle part of the butterfly.

[0011] Furthermore, the interior of the upper sleeve is fixedly connected to the bottom end of the valve stem, the interior of the lower sleeve is rotatably connected to a bearing, and the bottom end of the bearing is fixedly connected to the interior of the valve body.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] 1. The utility model can solve the problem of leakage or loss of control of the medium in the pipeline system, wear and damage of valve parts, and shortening the service life of the valve by setting the anti-seismic mechanism. By fixing the bottom of the valve body on the fixed plate, when it shakes up and down and vibrates, the bottom will drive the first connecting block to rotate through the hinge frame, and the rotating first connecting block will drive the sleeve at the bottom of the triangular block to slide left and right on the outside of the support rod, and then squeeze the first spring on the outside of the support rod through the two sleeves to reduce the frequency generated during vibration. In addition, when vibrating, when the outer sleeve inside the box slides on the outside of the inner sleeve, the top of the second spring on the outside of the inner sleeve is on the bottom of the outer sleeve, so as to reduce the floating generated during vibration and improve the stability of the valve body, thereby effectively improving the overall stability of the valve and increasing the service life of the valve.

[0014] 2. The sealing ring, butterfly, bearing and sealing ring can solve the problem that the valve may not be able to effectively provide sufficient sealing performance and may easily leak under high pressure or high temperature conditions. This may threaten the safety and reliability of the pipeline system. The two butterfly plates are driven to rotate by the bottom end of the valve stem to achieve the effect of opening and closing. The sealing rings on the outside of the two butterfly plates can improve the front and back sealing of the inside of the valve body after closing to prevent leakage and backflow. After closing, there will be some gas or liquid inside the two butterfly plates. The sealing ring inside the valve body corresponds to a butterfly and a sealing ring to ensure that the valve has excellent sealing performance in the closed state and effectively prevent medium leakage. When rotating, the two butterfly plates and sealing rings can be effectively reversed and rotated 360 degrees to achieve the same control effect, thereby effectively improving the flexibility, adjustability and durability of the valve, meeting the needs of fluid control in the pipeline system, and providing reliable protection for industrial production.

[0015] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a three-dimensional structural diagram of a double-sealed triple-eccentric butterfly valve proposed by the utility model;

[0017] Figure 2 A schematic diagram of an anti-seismic mechanism of a double-seal type triple-eccentric butterfly valve proposed in the utility model;

[0018] Figure 3 This is a cross-sectional structural diagram of the internal structure of the anti-seismic mechanism of a double-seal type triple-eccentric butterfly valve proposed by the utility model;

[0019] Figure 4This is a schematic diagram of an outer sleeve of a double-seal type triple-eccentric butterfly valve proposed by the utility model;

[0020] Figure 5 This is an internal cross-sectional structural diagram of a double-seal triple-eccentric butterfly valve proposed by the utility model;

[0021] Figure 6 This is a structural diagram of the second connection block of a double-seal type triple-eccentric butterfly valve proposed by the utility model;

[0022] Figure 7 This is a butterfly plate structure diagram of a double-seal triple-eccentric butterfly valve proposed by the utility model;

[0023] Figure 8 The utility model discloses a sealing ring structure diagram of a double-sealed triple-eccentric butterfly valve.

[0024] Legend:

[0025] 1. Valve body; 2. Anti-seismic mechanism; 201. Box body; 202. Four-hole angle plate; 203. Fixed plate; 204. Articulated frame; 205. First connecting block; 206. Triangular block; 207. Sleeve; 208. Support rod; 209. First spring; 210. Outer sleeve; 211. Inner sleeve; 212. Second spring; 3. Bracket; 4. Connecting column; 5. Fixed ring; 6. Valve stem; 7. O-ring; 8. Sealing ring; 9. Butterfly; 10. Second connecting block; 11. Upper sleeve; 12. Lower sleeve; 13. Bearing; 14. Sealing ring; 15. Turbine. DETAILED DESCRIPTION

[0026] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0027] like Figure 1 - Figure 4 As shown: a double-sealed triple-eccentric butterfly valve, comprising a valve body 1, and an anti-vibration mechanism 2 is arranged at the bottom of the valve body 1;

[0028] The anti-seismic mechanism 2 includes: a box body 201, four articulated frames 204 and two support rods 208. The bottom of the box body 201 is fixedly connected with a four-hole angle plate 202, and the four-hole angle plate 202 is fixed to the ground by bolts. The device can effectively support the entire device. A fixing plate 203 is arranged on the inner top wall of the box body 201. The bottom of the valve body 1 is threadedly connected to the top wall of the fixing plate 203. The inside of the four articulated frames 204 are all rotatably connected with a first connecting block 205. The first connecting block 205 is connected to the articulated frame 204, and can be driven to rotate when vibration occurs. The other sides of the four first connecting blocks 205 are rotatably connected to the triangular blocks 206, and the bottoms of the four triangular blocks 206 are fixedly connected to the sleeves 207, and the four sleeves 207 are slidably connected to the outer sides of the two support rods 208. The sleeves 207 at the bottom of the triangular blocks 206 are driven to slide on the support rods 208 by the rotating first connecting block 205 to change the motion trajectory. To provide shockproof for the valve body 1, the left and right ends of the two support rods 208 are fixedly connected to the inside of the box body 201, and the outer sides of the two support rods 208 are provided with first springs 209, and the two ends of the two first springs 209 are fixedly connected to one end of the two sleeves 207. When the sleeves 207 slide on the support rods 208, the first springs 209 on the outer sides of the support rods 208 are squeezed to reduce the frequency of vibration. The bottom of the fixed plate 203 is fixedly connected with an outer sleeve 210. The four outer sleeves 210 are fixedly connected to the bottom of the fixed plate 203. The inside of the sleeve 210 is slidably connected with an inner sleeve 211, and the inner sleeve 211 slides inside the outer sleeve 210 to reduce the up and down floating. The bottom ends of the four inner sleeves 211 are fixedly connected to the bottom wall inside the box body 201, and the outside of the four inner sleeves 211 is provided with a second spring 212. When the outer sleeve 210 slides on the outside of the inner sleeve 211, the outer sleeve 210 will squeeze the second spring 212 on the outside of the inner sleeve 211 to achieve the effect of buffering and rebounding.

[0029] like Figure 1 - Figure 7As shown, the top walls of the four articulated frames 204 are fixedly connected to the bottom wall of the fixed plate 203, the top of the valve body 1 is fixedly connected to the bracket 3, and the valve stem 6 is supported by the bracket 3. The top of the bracket 3 is fixedly connected to the connecting column 4, and the top ends of the four connecting columns 4 are fixedly connected to the fixing ring 5. The fixing ring 5 is fixed to the top of the bracket 3 by the connecting column 4, which can effectively protect the valve stem 6 to prevent impurities from entering the interior. The interior of the valve body 1 is rotatably connected to the valve stem 6, and the butterfly 9 is controlled by the valve stem 6. The interior of the bracket 3 is fixedly connected to the O-ring 7, and the internal rotation of the O-ring 7 is connected to the outer side of the valve stem 6. The O-ring 7 can ensure the sealing between the valve stem 6 and the valve body 1 to prevent medium leakage. The top end of the valve stem 6 is rotatably connected to the turbine 15, and the valve stem 6 is rotated by the turbine 15 to open the butterfly 9 at the bottom.

[0030] like Figure 1 - Figure 8 As shown, the inner front side wall of the valve body 1 is fixedly connected with a sealing ring 8, and the sealing ring 8 can enhance the sealing performance of the valve. The valve body 1 is provided with butterfly pieces 9, and the rear side walls of the two butterfly pieces 9 are fixedly connected with second connecting blocks 10. The other side of the upper four second connecting blocks 10 is fixedly connected with an upper shaft sleeve 11, and the butterfly piece 9 is fixed with the upper shaft sleeve 11 by the second connecting block 10, so as to control the butterfly piece 9, and the other side of the lower four second connecting blocks 10 is fixedly connected with a lower shaft sleeve 12, and the front butterfly piece 9 is arranged corresponding to the sealing ring 8, and the sealing ring 8 and a butterfly piece 9 are arranged relative to each other. The sealing performance of the interior of the valve body 1 can be improved. A sealing ring 14 is fixedly connected to the outer side of the middle part of the butterfly plate 9. The front and rear sides of the valve body 1 can be sealed by the two butterfly plates 9 and the sealing ring 14 to improve the service life. The interior of the upper sleeve 11 is fixedly connected to the bottom end of the valve stem 6. By fixing the upper sleeve 11 to the bottom end of the valve stem 6, the butterfly plate 9 is driven to open and close. The interior of the lower sleeve 12 is rotatably connected to the bearing 13. The bottom end of the bearing 13 is fixedly connected to the interior of the valve body 1. When opened, the lower sleeve 12 rotates on the outer side of the bearing 13 to achieve bottom support for the butterfly plate 9.

[0031] It should be noted that the utility model is a double-sealed three-eccentric butterfly valve. First, the front and rear of the valve body 1 are connected to the external conveying pipeline. After the connection, the valve stem 6 is driven to rotate the upper sleeve 11 by rotating the turbine 15 and drive the two butterfly leaves 9 to open. After opening, the liquid or gas will pass through the front and rear sides of the two butterfly leaves 9. After closing, the two butterfly leaves 9 and the sealing ring 14 will seal the front and rear ends of the valve body 1. However, after closing, there may be some liquid and gas inside the two butterfly leaves 9, which will fit with the front butterfly leaf 9 and the sealing ring 14 through the sealing ring 8 inside the valve body 1 to achieve a re-sealing effect to prevent gas and liquid from flowing out through the tiny gap.

[0032] When the internal air pressure is too high or it is hit by the outside, the fixed plate 203 at the bottom of the valve body 1 will slide up and down inside the box 201, and the inside of the hinged frame 204 at the bottom of the fixed plate 203 will drive the first connecting block 205 to rotate. The rotating first connecting block 205 drives the sleeve 207 to slide on the support rod 208 through the triangular block 206 to change the motion trajectory. The sliding sleeve 207 will squeeze the first spring 209 on the outside of the support rod 208 to reduce the frequency of vibration. In addition, when the fixed plate 203 slides, the outer sleeve 210 at the bottom will slide up and down on the outside of the inner sleeve 211. When the outer sleeve 210 slides downward, it will squeeze the second spring 212 to achieve the effect of buffering and rebound.

[0033] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A double-seal triple-eccentric butterfly valve, comprising a valve body (1), characterized in that: The bottom of the valve body (1) is provided with an anti-vibration mechanism (2); The anti-seismic mechanism (2) comprises: a box body (201), four hinged frames (204) and two support rods (208); the bottom of the box body (201) is fixedly connected to a four-hole angle plate (202); the inner top wall of the box body (201) is provided with a fixing plate (203); the bottom of the valve body (1) is threadedly connected to the top wall of the fixing plate (203); the inside of the four hinged frames (204) are all rotatably connected to a first connecting block (205); the other sides of the four first connecting blocks (205) are all rotatably connected to a triangular block (206); the bottoms of the four triangular blocks (206) are all fixedly connected to a sleeve (207); the four sleeves (207) are all slidably connected to the valve body (1); On the outer sides of the two support rods (208), the left and right ends of the two support rods (208) are fixedly connected to the inside of the box (201), and the outer sides of the two support rods (208) are provided with first springs (209), and the two ends of the two first springs (209) are fixedly connected to one end of the two sleeves (207). The bottom of the fixed plate (203) is fixedly connected to an outer sleeve (210), and the inside of the four outer sleeves (210) is slidably connected to an inner sleeve (211), and the bottom ends of the four inner sleeves (211) are fixedly connected to the bottom wall inside the box (201), and the outer sides of the four inner sleeves (211) are provided with second springs (212).

2. A double-seal triple-eccentric butterfly valve according to claim 1, characterized in that: The top walls of the four hinged frames (204) are fixedly connected to the bottom wall of the fixed plate (203); the top of the valve body (1) is fixedly connected to a bracket (3); the top of each bracket (3) is fixedly connected to a connecting column (4); and the tops of the four connecting columns (4) are fixedly connected to a fixing ring (5).

3. A double-seal triple-eccentric butterfly valve according to claim 2, characterized in that: The valve body (1) is rotatably connected to a valve stem (6) inside, the bracket (3) is fixedly connected to an O-ring (7) inside, the O-ring (7) is rotatably connected to the outside of the valve stem (6), and the top end of the valve stem (6) is rotatably connected to a turbine (15).

4. A double-seal triple-eccentric butterfly valve according to claim 1, characterized in that: A sealing ring (8) is fixedly connected to the inner front side wall of the valve body (1), a butterfly (9) is provided inside the valve body (1), and the rear side walls of the two butterfly plates (9) are fixedly connected to a second connecting block (10).

5. A double-seal triple-eccentric butterfly valve according to claim 4, characterized in that: An upper shaft sleeve (11) is fixedly connected to the other side of the four upper second connection blocks (10), and a lower shaft sleeve (12) is fixedly connected to the other side of the four lower second connection blocks (10). The front butterfly (9) is arranged corresponding to the sealing ring (8), and a sealing ring (14) is fixedly connected to the outer side of the middle part of the butterfly (9).

6. A double-seal triple-eccentric butterfly valve according to claim 5, characterized in that: The interior of the upper shaft sleeve (11) is fixedly connected to the bottom end of the valve stem (6), the interior of the lower shaft sleeve (12) is rotatably connected to a bearing (13), and the bottom end of the bearing (13) is fixedly connected to the interior of the valve body (1).

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