Corrosion resistant butterfly valve

Abstract

This application discloses a corrosion-resistant butterfly valve for use in the field of butterfly valves. This butterfly valve replaces the front and sides of the butterfly plate by adding a front plate and a sealing bladder to the existing butterfly plate, thereby effectively reducing the contact area between the butterfly plate and the medium. The front plate resists the impact of the medium, which not only effectively improves the corrosion resistance but also effectively weakens the impact force of the medium on the butterfly plate. While the front plate is impacted by the medium, its compressibility causes the sealing bladder to expand, thereby effectively improving the sealing performance of the butterfly plate's sides. In addition, a rear plate is added to the back of the butterfly plate. When the butterfly plate is opened, the impact of the medium on the external sealing membrane causes the rear plate to bulge, thereby effectively strengthening the flushing effect of the medium on the corrosive substances accumulated on the butterfly plate. This effectively improves the corrosion resistance, achieving improved corrosion resistance for the front and sides of the butterfly plate, while also effectively improving the sealing performance of the sides.

Description

Technical Field

[0001] This application relates to the field of butterfly valves, and in particular to a corrosion-resistant butterfly valve. Background Technology

[0002] A butterfly valve is a type of valve that uses a disc-shaped opening and closing element to rotate approximately 90° to open, close, or regulate the flow of media. Butterfly valves are not only simple in structure, small in size, lightweight, economical in material consumption, small in installation dimensions, low in driving torque, and easy and quick to operate, but they also simultaneously possess excellent flow regulation and sealing characteristics, making them one of the fastest-growing valve types in the past decade or so.

[0003] Butterfly valves have a simple structure and are easy to operate, and their sealing performance is relatively good. However, during long-term use, the scouring and corrosion of the medium can easily cause changes in the side dimensions of the butterfly plate, thus affecting the sealing effect. Currently, the methods used to solve the corrosion problem of butterfly valves are to use materials and coatings with anti-corrosion functions, but the effect is minimal.

[0004] Therefore, we use this technical solution to address the poor corrosion resistance of existing butterfly valves. Summary of the Invention

[0005] The purpose of this application is to improve the existing butterfly valve technology and provide a corrosion-resistant butterfly valve. By adding a front plate and a sealing bladder to the existing butterfly plate to replace the front and side of the butterfly plate, the contact area between the butterfly plate and the medium is effectively reduced. The front plate resists the impact of the medium, which not only effectively improves the corrosion resistance but also effectively weakens the impact force of the medium on the butterfly plate. When the front plate is impacted by the medium, the sealing bladder expands due to its compressibility, thereby effectively improving the sealing performance of the butterfly plate side. In addition, a rear plate is added to the back of the butterfly plate. When the butterfly plate is opened, the impact of the medium on the outer sealing membrane causes the rear plate to bulge, thereby effectively strengthening the flushing effect of the medium on the corrosive substances accumulated on the butterfly plate, thus effectively improving the corrosion resistance.

[0006] This improves the corrosion resistance of the front and sides of the butterfly plate, while also effectively enhancing the sealing effect of the sides.

[0007] Furthermore, a magnetic resisting disk is fixedly connected to the inner wall of the orifice, and the magnetic resisting disk and the fixed disk are opposite to each other and magnetically repel each other. The magnetic repulsion between the fixed disk and the magnetic resisting disk can effectively improve the impact resistance of the front plate surface and effectively prevent the front plate surface from being damaged by the impact force of the medium.

[0008] Furthermore, the front panel has a spherical structure and is made of corrosion-resistant polyurethane elastic material. The front panel replaces the front of the existing butterfly plate, effectively reducing the contact area between the butterfly plate and the medium, thereby effectively reducing the corrosion effect. The spherical structure has strong impact resistance and can effectively prevent the front panel from being deformed by impact.

[0009] Furthermore, multiple elastic strips are evenly distributed around the center of the fixed plate, and the elastic strips are made of elastic metal. The elastic strips provide support for the front panel, and the elastic strips rely on their elasticity to enhance the front panel's ability to resist impact, effectively preventing deformation of the front panel.

[0010] Furthermore, the interior of the orifice is filled with absorbent sponges, which have a mesh structure. When the butterfly plate is open, the absorbent sponges absorb deionized water. When the butterfly plate is closed, the absorbent sponges have a buffering effect, which can effectively prevent the front plate surface from being deformed by impact. When the front plate surface is impacted and flattened by the medium, the absorbent sponges release deionized water and squeeze it into the annular groove, causing the sealing bladder to expand, thereby effectively improving the sealing effect of the butterfly plate side.

[0011] Optionally, the back of the anti-corrosion butterfly plate has a back opening, and a rear plate surface is fixedly connected to the opening of the back opening. An L-shaped hydraulic cylinder is fixedly connected to the inner wall of the back opening, and a top head is internally and slidably connected to the end of the L-shaped hydraulic cylinder facing the rear plate surface. An elastic mesh is fixedly connected between the top head and the inner wall of the L-shaped hydraulic cylinder. A sliding plug is sealed and slidably connected to the end of the L-shaped hydraulic cylinder away from the top head, and a sealing fluid is filled between the sliding plug and the top head. The sliding plug extends to the outside of the anti-corrosion butterfly plate, and an outer sealing membrane covering the sliding plug is fixedly connected to the side wall of the anti-corrosion butterfly plate. When the anti-corrosion butterfly plate is in the open state, the outer sealing membrane faces the direction of medium flow. After being impacted by the medium, the outer sealing membrane collapses and pushes the sliding plug inward. The sliding plug pushes the top head outward against the rear plate surface through the sealing fluid, thereby making the rear plate surface bulge. This can effectively enhance the flushing effect of the medium on the rear plate surface, thereby flushing away the corrosive impurities accumulated on the surface of the rear plate surface, thus effectively improving the anti-corrosion effect of the butterfly plate.

[0012] Furthermore, the outer sealing membrane is located on the side wall facing the medium when the anti-corrosion butterfly plate is opened, and the outer sealing membrane is made of corrosion-resistant elastic material. When the anti-corrosion butterfly plate is opened, the outer sealing membrane is impacted by the medium and collapses, thus pushing against the rear plate surface and making it bulge. After the anti-corrosion butterfly plate is closed, the outer sealing membrane returns to its original shape by its own elasticity, which is convenient for the next impact.

[0013] Compared to existing technologies, the advantages of this application are:

[0014] (1) This solution replaces the front and side of the butterfly plate by adding a front plate and a sealing bladder to the existing butterfly plate, thereby effectively reducing the contact area between the butterfly plate and the medium. The front plate resists the impact of the medium, which not only effectively improves the anti-corrosion effect, but also effectively weakens the impact force of the medium on the butterfly plate. While the front plate is impacted by the medium, the sealing bladder expands due to its compressibility, thereby effectively improving the sealing performance of the butterfly plate side. In addition, a rear plate is added to the back of the butterfly plate. When the butterfly plate is opened, the impact of the medium on the outer sealing membrane causes the rear plate to bulge, thereby effectively strengthening the flushing effect of the medium on the corrosive substances accumulated on the butterfly plate, thus effectively improving the anti-corrosion effect. This improves the anti-corrosion effect on the front and side of the butterfly plate, and also effectively improves the sealing effect of the side.

[0015] (2) The inner wall of the orifice is also fixedly connected to a magnetic resisting disk, and the magnetic resisting disk and the fixed disk are opposite to each other and magnetically repel each other. The magnetic repulsion between the fixed disk and the magnetic resisting disk can effectively improve the impact resistance of the front plate and effectively prevent the front plate from being damaged by the impact force of the medium.

[0016] (3) The front panel is a spherical structure and is made of corrosion-resistant polyurethane elastic material. The front panel replaces the front of the existing butterfly plate, which effectively reduces the contact area between the butterfly plate and the medium, thereby effectively reducing the corrosion effect. The spherical structure has strong impact resistance and can effectively prevent the front panel from being deformed by impact.

[0017] (4) Multiple elastic strips are distributed at equal intervals around the center of the fixed plate. The elastic strips are made of elastic metal. The elastic strips provide support for the front panel and rely on elasticity to enhance the front panel's ability to resist impact, effectively preventing deformation of the front panel.

[0018] (5) The inside of the opening mouth is also filled with absorbent sponge, and the absorbent sponge has a mesh structure. When the butterfly plate is open, the absorbent sponge absorbs deionized water. When the butterfly plate is closed, the absorbent sponge has a buffering effect, which can effectively prevent the front plate surface from being impacted and deformed. When the front plate surface is impacted and flattened by the medium, the absorbent sponge removes deionized water and squeezes it into the annular groove, causing the sealing bag to expand, thereby effectively improving the sealing effect of the butterfly plate side.

[0019] (6) The back of the anti-corrosion butterfly plate is provided with a back opening, and the back plate is fixedly connected to the opening of the back opening. An L-shaped hydraulic cylinder is fixedly connected to the inner wall of the back opening. A top head is internally and slidably connected to the end of the L-shaped hydraulic cylinder facing the back plate. An elastic net is fixedly connected between the top head and the inner wall of the L-shaped hydraulic cylinder. A sliding plug is sealed and slidably connected to the end of the L-shaped hydraulic cylinder away from the top head. A sealing liquid is filled between the sliding plug and the top head. The sliding plug extends to the outside of the anti-corrosion butterfly plate. An outer sealing membrane covering the outside of the sliding plug is fixedly connected to the side wall of the anti-corrosion butterfly plate. When the anti-corrosion butterfly plate is in the open state, the outer sealing membrane faces the direction of medium flow. After being impacted by the medium, the outer sealing membrane collapses and pushes the sliding plug inward. The sliding plug pushes the top head outward to push the back plate through the sealing liquid, thereby making the back plate bulge. This can effectively enhance the flushing effect of the medium on the back plate, thereby flushing away the corrosive impurities accumulated on the surface of the back plate, thus effectively improving the anti-corrosion effect of the butterfly plate.

[0020] (7) The outer sealing membrane is located on the side wall facing the medium when the anti-corrosion butterfly plate is opened. The outer sealing membrane is made of corrosion-resistant elastic material. When the anti-corrosion butterfly plate is opened, the outer sealing membrane is impacted by the medium and becomes flat, thus pushing against the rear plate surface to make it bulge. After the anti-corrosion butterfly plate is closed, the outer sealing membrane returns to its original shape by its own elasticity, which is convenient for the next impact. Attached Figure Description

[0021] Figure 1 This is a perspective view of the present application;

[0022] Figure 2 This is a perspective view of the corrosion-resistant butterfly plate of this application;

[0023] Figure 3 This is a side view of the corrosion-resistant butterfly plate of this application;

[0024] Figure 4 This is a top view of the corrosion-resistant butterfly plate of this application;

[0025] Figure 5 This is a diagram showing the state of the corrosion-resistant butterfly plate in this application when it is closed;

[0026] Figure 6 This is a front view of the anti-corrosion butterfly plate of this application;

[0027] Figure 7 This is a top view of the rear panel before deformation in this application;

[0028] Figure 8 This is a top view of the rear panel after deformation in this application.

[0029] Explanation of the labels in the diagram:

[0030] 1 Valve body, 2 Valve stem, 3 Corrosion-resistant butterfly plate, 301 Forward opening cavity, 302 Annular groove, 3021 Liquid inlet, 303 Backward opening cavity, 4 Front plate, 5 Fixed plate, 6 Magnetic resistance plate, 7 Inner support ring, 8 Elastic strip, 9 Sealing bladder, 10 Rear plate, 11 L-shaped hydraulic cylinder, 12 Top head, 13 Elastic net, 14 Sliding plug, 15 Outer sealing membrane. Detailed Implementation

[0031] The embodiments will be described clearly and completely with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments in this application without creative effort are within the scope of protection of this application.

[0032] Example 1:

[0033] A corrosion-resistant butterfly valve, please refer to [link / reference]. Figure 1 , 2 and Figure 3 The valve body includes a valve body 1, inside which a valve stem 2 is installed. A corrosion-resistant butterfly plate 3 is fixedly connected to the valve stem 2. The front of the corrosion-resistant butterfly plate 3 has a front opening cavity 301, and a front plate surface 4 is fixedly connected to the opening of the front opening cavity 301. The front plate surface 4 has a spherical structure and is made of corrosion-resistant polyurethane elastic material. The front plate surface 4 replaces the front of the existing butterfly plate, effectively reducing the contact area between the butterfly plate and the medium, thereby effectively reducing the corrosion effect. The spherical structure has strong impact resistance and can effectively prevent the front plate surface 4 from being deformed by impact. A fixed plate 5 is fixedly connected to the inner wall of the middle part of the front plate surface 4. A magnetic resisting plate 6 is also fixedly connected to the inner wall of the front opening cavity 301. The magnetic resisting plate 6 and the fixed plate 5 are opposite to each other and magnetically repel each other. The magnetic repulsion between the fixed plate 5 and the magnetic resisting plate 6 can effectively improve the impact resistance of the front plate surface 4 and effectively prevent the front plate surface 4 from being damaged by the impact of the medium.

[0034] Please see Figure 4 , 5 and Figure 6An inner support ring 7 is fixedly connected to the inner wall of the orifice 301, and multiple elastic strips 8 are fixedly connected between the fixed plate 5 and the inner support ring 7. The multiple elastic strips 8 are evenly distributed around the center of the fixed plate 5, and the elastic strips 8 are made of elastic metal. The elastic strips 8 provide support for the front plate surface 4, and the elastic strips 8 rely on elasticity to enhance the front plate surface 4's ability to resist impact, effectively preventing deformation of the front plate surface 4. The anti-corrosion butterfly plate 3 has an annular groove 302 on its inner wall near the front plate surface 4, and multiple liquid inlets 3021 communicating with the inside of the annular groove 302 are opened on the side wall of the orifice 301. The sealing bladder 9 is fixedly connected (preferably made of corrosion-resistant rubber, but other materials can be selected according to actual needs). The interior of the orifice 301 and the annular groove 302 is filled with deionized water. The interior of the orifice 301 is also filled with absorbent sponge with a mesh structure. When the butterfly plate is open, the absorbent sponge absorbs the deionized water. When the butterfly plate is closed, the absorbent sponge has a buffering effect, which can effectively prevent the front plate surface 4 from being deformed by impact. When the front plate surface 4 is impacted and collapsed by the medium, the absorbent sponge releases the deionized water and squeezes it into the annular groove 302, causing the sealing bladder 9 to expand, thereby effectively improving the sealing effect of the butterfly plate side.

[0035] Example 2:

[0036] Based on Example 1, please refer to Figure 7 , 8The anti-corrosion butterfly plate 3 has a back opening 303 on its back side, and a back plate surface 10 (preferably made of polyurethane elastic material, but other materials can be selected according to actual needs) is fixedly connected to the opening of the back opening 303. An L-shaped hydraulic cylinder 11 is fixedly connected to the inner wall of the back opening 303, and a top head 12 is internally and slidably connected to the end of the L-shaped hydraulic cylinder 11 facing the back plate surface 10. An elastic net 13 is fixedly connected between the top head 12 and the inner wall of the L-shaped hydraulic cylinder 11. A sliding plug 14 is sealed and slidably connected to the end of the L-shaped hydraulic cylinder 11 away from the top head 12, and a sealing liquid is filled between the sliding plug 14 and the top head 12. The sliding plug 14 extends to the outside of the anti-corrosion butterfly plate 3, and an outer sealing membrane 15 covering the sliding plug 14 is fixedly connected to the side wall of the anti-corrosion butterfly plate 3. The outer sealing membrane 15 is located on the anti-corrosion butterfly plate 3. When the plate 3 is open, it faces the side wall of the medium, and the outer sealing membrane 15 is made of corrosion-resistant elastic material. When the anti-corrosion butterfly plate 3 is opened, the outer sealing membrane 15 is impacted by the medium and collapses, thus pushing the rear plate surface 10 outward and making it bulge. After the anti-corrosion butterfly plate 3 is closed, the outer sealing membrane 15 returns to its original shape due to its own elasticity, which facilitates the next impact. When the anti-corrosion butterfly plate 3 is in the open state, the outer sealing membrane 15 faces the direction of medium flow. After the outer sealing membrane 15 is impacted by the medium, it collapses and pushes the sliding plug 14 inward. The sliding plug 14 pushes the top head 12 outward and pushes the rear plate surface 10 outward through the sealing fluid, thus making the rear plate surface 10 bulge. This can effectively enhance the flushing effect of the medium on the rear plate surface 10, thereby flushing away the corrosive impurities accumulated on the surface of the rear plate surface 10, thus effectively improving the anti-corrosion effect of the butterfly plate.

[0037] The working principle of this solution is as follows: When the anti-corrosion butterfly plate 3 is in the closed state, the medium impacts the front plate surface 4. The front plate surface 4 replaces the front of the existing butterfly plate, effectively reducing the contact area between the butterfly plate and the medium, thereby effectively reducing the corrosion effect. The elastic strip 8 provides support for the front plate surface 4, and the elastic strip 8 relies on its elasticity to enhance the front plate surface 4's ability to resist impact, effectively preventing deformation of the front plate surface 4. In addition, the magnetic resisting disk 6 and the fixed disk 5 are opposite to each other and magnetically repel each other. The magnetic repulsion between the fixed disk 5 and the magnetic resisting disk 6... The force can effectively improve the impact resistance of the front plate 4. However, when the anti-corrosion butterfly plate 3 is in the open state, the outer sealing film 15 is facing the direction of medium flow. After the outer sealing film 15 is impacted by the medium, it collapses and pushes the sliding plug 14 inward. The sliding plug 14 pushes the top head 12 outward to push the rear plate 10 through the sealing fluid, so that the rear plate 10 bulges. This can effectively enhance the flushing effect of the medium on the rear plate 10, thereby flushing away the corrosive impurities accumulated on the surface of the rear plate 10, thus effectively improving the anti-corrosion effect of the butterfly plate.

[0038] The above description is only the best implementation method adopted in this application in combination with current practical needs, but the scope of protection of this application is not limited thereto.

Claims

1. A corrosion-resistant butterfly valve, comprising a valve body (1), characterized in that, A valve stem (2) is installed inside the valve body (1), and a corrosion-resistant butterfly plate (3) is fixedly connected to the valve stem (2). The front of the corrosion-resistant butterfly plate (3) has a front opening cavity (301), and a front plate surface (4) is fixedly connected to the opening of the front opening cavity (301). A fixing plate (5) is fixedly connected to the inner wall of the middle part of the front plate surface (4), and an inner support ring (7) is fixedly connected to the inner wall of the front opening cavity (301). The fixing plate (5) and the inner support ring (7) are also fixedly connected. Multiple elastic strips (8) are fixedly connected between the support rings (7). The inner wall of the anti-corrosion butterfly plate (3) near the front plate surface (4) is provided with an annular groove (302), and the side wall of the front opening cavity (301) is provided with multiple liquid inlets (3021) communicating with the inside of the annular groove (302). A sealing bladder (9) is fixedly connected to the opening of the annular groove (302). The inside of the front opening cavity (301) and the annular groove (302) is filled with deionized water.

2. The corrosion-resistant butterfly valve according to claim 1, characterized in that, The inner wall of the orthogonal opening (301) is also fixedly connected to a magnetic resisting disk (6), and the magnetic resisting disk (6) and the fixed disk (5) are opposite to each other and magnetically repel each other.

3. The corrosion-resistant butterfly valve according to claim 1, characterized in that, The front panel (4) has a spherical structure and is made of corrosion-resistant polyurethane elastic material.

4. The corrosion-resistant butterfly valve according to claim 1, characterized in that, Multiple elastic strips (8) are distributed at equal intervals around the center of the fixed disk (5), and the elastic strips (8) are made of elastic metal.

5. The corrosion-resistant butterfly valve according to claim 1, characterized in that, The interior of the orifice (301) is also filled with an absorbent sponge, and the absorbent sponge has a mesh structure.

6. The corrosion-resistant butterfly valve according to claim 1, characterized in that, The back of the anti-corrosion butterfly plate (3) is provided with a back opening mouth (303), and a back plate surface (10) is fixedly connected to the opening of the back opening mouth (303). An L-shaped hydraulic cylinder (11) is fixedly connected to the inner wall of the back opening mouth (303), and a top head (12) is internally sealed and slidably connected to one end of the L-shaped hydraulic cylinder (11) facing the back plate surface (10). An elastic net (13) is fixedly connected between the top head (12) and the inner wall of the L-shaped hydraulic cylinder (11). A sliding plug (14) is sealed and slidably connected to one end of the L-shaped hydraulic cylinder (11) away from the top head (12), and a sealing liquid is filled between the sliding plug (14) and the top head (12). The sliding plug (14) extends to the outside of the anti-corrosion butterfly plate (3), and an outer sealing membrane (15) covering the outside of the sliding plug (14) is fixedly connected to the side wall of the anti-corrosion butterfly plate (3).

7. The corrosion-resistant butterfly valve according to claim 6, characterized in that, The outer sealing membrane (15) is located on the side wall facing the medium when the anti-corrosion butterfly plate (3) is opened, and the outer sealing membrane (15) is made of corrosion-resistant elastic material.

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