Corrosion-resistant bidirectional sealing adjustable three-eccentric metal hard sealing butterfly valve

Abstract

The application discloses a corrosion-resistant bidirectional sealing adjustable three-eccentric metal hard sealing butterfly valve, and particularly relates to the technical field of butterfly valves, which comprises a butterfly valve body, a butterfly plate, a valve rod, a valve seat, a metal sealing ring, a driving component and a flange, the inside of the butterfly valve body is provided with the butterfly plate, and the left end of the butterfly plate is provided with the valve rod; the pressure relief assembly is arranged, when the butterfly plate is opened, the valve rod is first driven to rotate anticlockwise by the driving component, at the moment, the fixed block rotates in the rotating groove and cannot drive the butterfly plate to rotate, the valve rod drives the convex block to rotate, and then drives the pressure relief plate to move rightwards, so that the pressure relief hole is opened, the pressure of the inflow end of the butterfly valve is released, when the fixed block abuts against one end of the rotating groove, the valve rod drives the butterfly plate to rotate at the moment, and then the butterfly valve is opened, so that the pressure difference between the two sides of the butterfly plate is avoided to be too large, the butterfly plate is not easy to rotate, the power consumption when the butterfly valve is opened is reduced, the stress on the valve rod is reduced, and the service life of the valve rod is prolonged.

Description

Technical Field

[0001] This invention relates to the field of butterfly valve technology, and more specifically, to a corrosion-resistant, bidirectional, adjustable, triple-eccentric metal hard-seal butterfly valve. Background Technology

[0002] A butterfly valve, also known as a flap valve, is a simple regulating valve used for on / off control of low-pressure pipeline media. A butterfly valve is defined as a valve whose closing element (valve disc or butterfly plate) is a disc that rotates around the valve shaft to achieve opening and closing. A triple-eccentric butterfly valve is one where the valve stem shaft is offset from both the disc center and the body center, and the valve seat rotation axis is at a certain angle to the valve body channel axis. Triple-eccentric butterfly valves are widely used in industrial pipelines in metallurgy, power, petrochemical, water supply and drainage, and municipal construction where the medium temperature is ≤425℃, for regulating flow and cutting off fluid flow.

[0003] A bidirectional pure metal sealed triple eccentric butterfly valve, disclosed in CN212338214U, includes a valve body, a butterfly plate, a valve stem, and a valve seat. A flow channel is provided within the valve body. The valve stem is vertically positioned and passes through the flow channel. The butterfly plate is disposed within the flow channel and fixedly mounted on the valve stem. An annular valve body boss is provided on the valve body along the inner wall of the flow channel. The valve seat is disposed on one side of the valve body boss. A fastening screw for connecting the valve seat is provided on the valve body boss. The valve seat has an S-shaped cross-section. The edge of the butterfly plate has an annular stepped surface, and a sealing ring and a pressure ring are installed at the stepped surface. The advantages of this utility model are: 1. Reliable bidirectional sealing; 2. Low driving torque; 3. Pure metal hard seal, high temperature resistance, corrosion resistance, and wear resistance.

[0004] When a butterfly valve is in use and the pressure inside the inflow end is high when it is in the closed state, the pressure difference between the two sides makes it difficult for the butterfly plate to flip open. This increases the power consumption when the butterfly valve is opened and also increases the burden on the valve stem. Over time, this will reduce the service life of the valve stem. Summary of the Invention

[0005] To overcome the above-mentioned defects of the prior art, the present invention provides a corrosion-resistant bidirectional sealing adjustable triple eccentric metal hard seal butterfly valve. The technical problem to be solved by the present invention is that when the butterfly valve is in the closed state, the pressure inside the inflow end is large. At this time, due to the pressure difference on both sides, the butterfly plate is difficult to rotate and open, which increases the power consumption when the butterfly valve is opened and also increases the burden on the valve stem. Over time, this will lead to damage to the valve stem.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a corrosion-resistant, bidirectional, adjustable, triple-eccentric metal hard-seal butterfly valve, comprising a butterfly valve body, a butterfly plate, a valve stem, a valve seat, a metal sealing ring, a drive component, and a flange. The butterfly valve body contains a butterfly plate, and a valve stem is installed at the left end of the butterfly plate. Both ends of the valve stem are rotatably connected to the middle of the butterfly valve body. A valve seat that cooperates with the butterfly plate is installed inside the butterfly valve body, and the butterfly plate is engaged within the valve seat. A metal sealing ring is fitted onto the outer side of the butterfly plate. A drive component is fixedly installed at the upper end of the butterfly valve body, and the output shaft of the drive component is fixedly installed at the upper end of the butterfly plate. Flanges are fixedly connected to both the left and right ends of the butterfly valve body. A pressure relief component is provided in the middle of the butterfly plate, and a cleaning component is provided on the right side of the butterfly plate.

[0007] The pressure relief assembly includes a pressure relief plate, which is engaged in the middle of the butterfly plate. A pressure relief hole that mates with the pressure relief plate is opened in the middle of the butterfly plate. A mounting post is fixedly connected to the left side of the pressure relief hole. A ball head is fixedly connected to the left end of the mounting post. A protrusion is fixedly installed in the middle of the valve stem. A first groove and a second groove that mate with the mounting post and the ball head are respectively opened on the outer side of the protrusion. The mounting post and the ball head are engaged in the first groove and the second groove respectively. The outer diameter of the protrusion gradually increases in a clockwise direction.

[0008] As a further embodiment of the present invention: both the upper and lower ends of the middle left side of the butterfly plate are fixedly connected to mounting ears, the valve stem is inserted into the middle of the pressure relief plate, the right end of the inner wall of the pressure relief plate is fixedly connected to a fixing block, and the valve stem is provided with a rotating groove that cooperates with the fixing block at the mounting ear.

[0009] As a further embodiment of the present invention: a mounting bracket is fixedly connected to the middle of the left end of the valve stem, a limit rod is fixedly connected to the left end of the pressure relief plate, the left end of the limit rod passes through the middle of the mounting bracket and extends to the left side of the mounting bracket, and a limit hole that cooperates with the limit rod is opened in the middle of the mounting bracket.

[0010] As a further aspect of the present invention: a sealing gasket is bonded to the outer side of the pressure relief plate, and the sealing gasket is made of rubber.

[0011] As a further aspect of the present invention: the pressure relief plate is designed in the shape of a frustum, and the diameter of the left end of the pressure relief plate is smaller than the diameter of the right end.

[0012] As a further aspect of the present invention, the right end of the pressure relief plate is designed with an arc surface.

[0013] As a further embodiment of the present invention: the cleaning assembly includes a mounting plate, the right side of the pressure relief plate is provided with the mounting plate, both ends of the mounting plate are fixedly connected to scrapers, the pressure relief hole is in contact with the right side surface of the pressure relief plate, the outer end of the scraper is fixedly connected to a slider, the right end of the butterfly plate is provided with a third sliding groove that cooperates with the slider, the slider is engaged in the third sliding groove, the middle of the right end of the pressure relief plate is fixedly connected to a spiral rod, the spiral rod is inserted into the middle of the mounting plate, and the middle of the mounting plate is provided with a spiral groove that cooperates with the spiral rod.

[0014] As a further aspect of the present invention: the inner wall of the butterfly valve body and the outer surface of the butterfly plate are both provided with a corrosion-resistant coating, which is a nano-ceramic wear-resistant coating.

[0015] The beneficial effects of this invention are as follows:

[0016] 1. This invention incorporates a pressure relief component. When the butterfly valve is opened, the driving component first rotates the valve stem counterclockwise. At this time, the fixed block rotates within the rotating groove and does not rotate the butterfly valve. The rotation of the valve stem causes the protrusion to rotate, thereby causing the ball head to slide along the second sliding groove, which in turn pushes the pressure relief plate to the right, thus opening the pressure relief hole and releasing the pressure at the inflow end of the butterfly valve. When the fixed block abuts against one end of the rotating groove, the rotation of the valve stem causes the butterfly valve to rotate, thereby opening the butterfly valve. This avoids a large pressure difference on both sides of the butterfly valve, which would make it difficult for the butterfly valve to rotate. It also reduces the power consumption when the butterfly valve is opened, reduces the stress on the valve stem, and improves the service life of the valve stem.

[0017] 2. This invention incorporates a cleaning component. When the butterfly valve is opened, the pressure relief plate moves to the right, causing the spiral rod to move to the right, which in turn drives the mounting plate to rotate. This, in turn, drives the scraper to rotate, allowing the scraper to clean the dirt on the surface of the butterfly plate and prevent long-term residue from corroding the butterfly plate. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0019] Figure 2 This is a top sectional view of the structure of the present invention;

[0020] Figure 3 For the present invention Figure 2 Enlarged structural diagram at point A;

[0021] Figure 4 This is a three-dimensional structural diagram of the butterfly plate, valve stem, and pressure relief assembly of the present invention;

[0022] Figure 5 This is a three-dimensional structural diagram of the butterfly plate, valve stem, pressure relief assembly, and cleaning assembly of the present invention;

[0023] Figure 6 This is a three-dimensional structural diagram of the butterfly plate, pressure relief hole, mounting ear, fixing block, mounting bracket and limiting hole of the present invention;

[0024] Figure 7 This is a three-dimensional structural diagram of the valve stem and rotating groove of the present invention;

[0025] Figure 8 For the present invention Figure 7 Enlarged schematic diagram of the mechanism at point B;

[0026] Figure 9 This is a three-dimensional structural diagram of the pressure relief plate, mounting column, ball head, limiting rod, and cleaning assembly of the present invention.

[0027] In the diagram: 1. Butterfly valve body; 2. Butterfly plate; 3. Valve stem; 4. Valve seat; 5. Metal sealing ring; 6. Drive component; 7. Flange; 811. Pressure relief plate; 812. Pressure relief hole; 813. Mounting column; 814. Ball head; 815. Protrusion; 816. First slide groove; 817. Second slide groove; 818. Mounting ear; 819. Fixing block; 820. Rotary groove; 821. Mounting bracket; 822. Limiting rod; 823. Limiting hole; 824. Sealing gasket; 911. Mounting plate; 912. Scraper; 913. Sliding block; 914. Third slide groove; 915. Helical rod. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9As shown, this invention provides a corrosion-resistant, bidirectional, adjustable, triple-eccentric metal hard-seal butterfly valve, comprising a butterfly valve body 1, a butterfly plate 2, a valve stem 3, a valve seat 4, a metal sealing ring 5, a drive component 6, and a flange 7. The butterfly plate 2 is disposed inside the butterfly valve body 1, and the valve stem 3 is installed at the left end of the butterfly plate 2. Both ends of the valve stem 3 are rotatably connected to the middle of the butterfly valve body 1. A valve seat 4, which cooperates with the butterfly plate 2, is installed inside the butterfly valve body 1. The butterfly plate 2 is engaged within the valve seat 4, and a metal sealing ring 5 is fitted onto the outer side of the butterfly plate 2. The valve body 1 is equipped with a sealing ring 5. A drive component 6 is fixedly installed on the upper end of the valve body 1. The drive component 6 can be an electric actuator. The output shaft of the drive component 6 is fixedly installed on the upper end of the butterfly plate 2. Flanges 7 are fixedly connected to both the left and right ends of the valve body 1. A pressure relief component is provided in the middle of the butterfly plate 2. The inner wall of the valve body 1 and the outer surface of the butterfly plate 2 are both provided with a corrosion-resistant coating. The corrosion-resistant coating is a nano-ceramic wear-resistant coating, which improves the corrosion resistance of the valve body 1 and the butterfly plate 2 and improves the service life of the butterfly valve.

[0030] The pressure relief assembly includes a pressure relief plate 811, which is engaged in the middle of the butterfly plate 2. A pressure relief hole 812, which mates with the pressure relief plate 811, is opened in the middle of the butterfly plate 2. A mounting post 813 is fixedly connected to the left side of the pressure relief hole 812. A ball head 814 is fixedly connected to the left end of the mounting post 813. A protrusion 815 is fixedly installed in the middle of the valve stem 3. A first groove 816 and a second groove 817, which mate with the mounting post 813 and the ball head 814, are respectively opened on the outer side of the protrusion 815. The mounting post 813 and the ball head 814 are engaged in the first groove 816 and the second groove 817, respectively. The outer diameter of the protrusion 815 gradually increases clockwise. Mounting ears 818 are fixedly connected to both the upper and lower ends of the middle left side of the butterfly plate 2. The valve stem 3 is inserted into the middle of the pressure relief plate 811. A fixing device is fixedly connected to the right end of the inner wall of the pressure relief plate 811. Block 819, valve stem 3 is provided with a rotating groove 820 at mounting ear 818 that cooperates with fixed block 819. When butterfly plate 2 is opened, first drive component 6 drives valve stem 3 to rotate counterclockwise. At this time, fixed block 819 rotates in rotating groove 820 and does not drive butterfly plate 2 to rotate. Valve stem 3 rotates and drives protrusion 815 to rotate, so that ball head 814 slides along second slide groove 817, thereby pushing pressure relief plate 811 to move to the right, thereby opening pressure relief hole 812 and releasing pressure at the inflow end of butterfly valve. When fixed block 819 abuts against one end of rotating groove 820, valve stem 3 rotates and drives butterfly plate 2 to rotate, thereby opening butterfly valve. This avoids large pressure difference on both sides of butterfly plate 2, which makes butterfly plate 2 difficult to rotate. It also reduces power consumption when butterfly valve is opened, reduces stress on valve stem 3, and improves service life of valve stem 3.

[0031] A mounting bracket 821 is fixedly connected to the middle of the left end of the valve stem 3. A limit rod 822 is fixedly connected to the left end of the pressure relief plate 811. The left end of the limit rod 822 passes through the middle of the mounting bracket 821 and extends to the left side of the mounting bracket 821. A limit hole 823 is provided in the middle of the mounting bracket 821 to cooperate with the limit rod 822. The limit rod 822 can ensure that the pressure relief plate 811 can move horizontally, thereby ensuring the reliability of the sealing of the pressure relief plate 811. A sealing gasket 8 is bonded to the outside of the pressure relief plate 811. 24. The sealing gasket 824 is made of rubber. The sealing gasket 824 ensures the airtightness of the pressure relief plate 811 when it is engaged in the pressure relief hole 812, preventing leakage. The pressure relief plate 811 is designed in the shape of a frustum. The diameter of the left end of the pressure relief plate 811 is smaller than the diameter of the right end. The frustum shape of the pressure relief plate 811 further improves the airtightness in the pressure relief hole 812. The right end of the pressure relief plate 811 is designed with an arc surface. When the inflow end is located on the right side of the butterfly plate 2, it can reduce the resistance to the pressure relief plate 811 moving to the right.

[0032] like Figure 2 , Figure 3 , Figure 5 and Figure 9 As shown, a cleaning assembly is provided on the right side of the butterfly plate 2. The cleaning assembly includes a mounting plate 911. A mounting plate 911 is also provided on the right side of the pressure relief plate 811. Scrapers 912 are fixedly connected to both ends of the mounting plate 911. The pressure relief hole 812 is in contact with the right side surface of the pressure relief plate 811. A slider 913 is fixedly connected to the outer end of the scraper 912. A third groove 914 is provided on the right end of the butterfly plate 2, which cooperates with the slider 913. The slider 913 is engaged in the third groove 914. The pressure relief plate 811... A spiral rod 915 is fixedly connected to the middle of the right end. The spiral rod 915 is inserted into the middle of the mounting plate 911. The middle of the mounting plate 911 has a spiral groove that cooperates with the spiral rod 915. When the butterfly valve is opened, the pressure relief plate 811 moves to the right, which causes the spiral rod 915 to move to the right, thereby driving the mounting plate 911 to rotate, which in turn drives the scraper 912 to rotate, so that the scraper 912 cleans the dirt on the surface of the butterfly plate 2, preventing the long-term residual dirt on the surface of the butterfly plate 2 from corroding the butterfly plate 2.

[0033] Working principle of this invention:

[0034] When the pressure difference between the two sides of the butterfly plate 2 is large, when the butterfly plate 2 is opened, the driving component 6 first drives the valve stem 3 to rotate counterclockwise. At this time, the fixed block 819 rotates in the rotating groove 820 and does not drive the butterfly plate 2 to rotate. The rotation of the valve stem 3 drives the protrusion 815 to rotate counterclockwise, so that the ball head 814 slides along the second sliding groove 817, thereby pushing the pressure relief plate 811 to move to the right, thereby opening the pressure relief hole 812 and releasing the pressure at the inflow end of the butterfly valve. Until the fixed block 819 abuts against one end of the rotating groove 820, the valve stem 3 rotates and drives the butterfly plate 2 to rotate, thereby opening the butterfly valve.

[0035] At the same time, when the pressure relief plate 811 moves to the right, the spiral rod 915 moves to the right, thereby driving the mounting plate 911 to rotate, which in turn drives the scraper 912 to rotate, so that the scraper 912 cleans the dirt on the surface of the butterfly plate 2.

[0036] When the butterfly valve needs to be closed, the drive component 6 drives the valve stem 3 to rotate clockwise, so that the fixed block 819 rotates in the rotating groove 820 without driving the butterfly plate 2 to rotate. The rotation of the valve stem 3 drives the protrusion 815 to rotate clockwise, so that the ball head 814 slides along the second sliding groove 817, thereby pulling the pressure relief plate 811 to move to the left. The pressure relief plate 811 is inserted into the pressure relief hole 812 and blocks the pressure relief hole 812 until the fixed block 819 abuts against the other end of the rotating groove 820. At this time, the rotation of the valve stem 3 drives the butterfly plate 2 to rotate, thereby closing the butterfly valve.

[0037] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0038] Secondly: The accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other.

[0039] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A corrosion-resistant, bidirectional, adjustable, triple-eccentric metal hard-seal butterfly valve, comprising a butterfly valve body (1), a butterfly plate (2), a valve stem (3), a valve seat (4), a metal sealing ring (5), a drive component (6), and a flange (7), characterized in that: The butterfly valve body (1) is provided with a butterfly plate (2) inside. A valve stem (3) is installed at the left end of the butterfly plate (2). The two ends of the valve stem (3) are rotatably connected to the middle of the butterfly valve body (1). A valve seat (4) that cooperates with the butterfly plate (2) is installed inside the butterfly valve body (1). The butterfly plate (2) is locked in the valve seat (4). A metal sealing ring (5) is sleeved on the outside of the butterfly plate (2). A drive component (6) is fixedly installed at the upper end of the butterfly valve body (1). The output shaft of the drive component (6) is fixedly installed at the upper end of the butterfly plate (2). Flanges (7) are fixedly connected to both the left and right ends of the butterfly valve body (1). A pressure relief component is provided in the middle of the butterfly plate (2). A cleaning component is provided on the right side of the butterfly plate (2). The pressure relief assembly includes a pressure relief plate (811), which is engaged in the middle of the butterfly plate (2). A pressure relief hole (812) is provided in the middle of the butterfly plate (2) to cooperate with the pressure relief plate (811). A mounting post (813) is fixedly connected to the left side of the pressure relief hole (812). A ball head (814) is fixedly connected to the left end of the mounting post (813). A protrusion (815) is fixedly installed in the middle of the valve stem (3). A first groove (816) and a second groove (817) are respectively provided on the outer side of the protrusion (815) to cooperate with the mounting post (813) and the ball head (814). The mounting post (813) and the ball head (814) are respectively engaged in the first groove (816) and the second groove (817). The outer diameter of the protrusion (815) gradually increases in the clockwise direction.

2. The corrosion-resistant, bidirectional, adjustable, triple-eccentric metal hard-seal butterfly valve according to claim 1, characterized in that: The butterfly plate (2) has mounting ears (818) fixedly connected to both the upper and lower ends of the middle left side. The valve stem (3) is inserted into the middle of the pressure relief plate (811). The right end of the inner wall of the pressure relief plate (811) is fixedly connected to a fixing block (819). The valve stem (3) is provided with a rotating groove (820) at the mounting ear (818) that cooperates with the fixing block (819).

3. The corrosion-resistant, bidirectional, adjustable, triple-eccentric metal hard-seal butterfly valve according to claim 1, characterized in that: A mounting bracket (821) is fixedly connected to the middle of the left end of the valve stem (3), and a limit rod (822) is fixedly connected to the left end of the pressure relief plate (811). The left end of the limit rod (822) passes through the middle of the mounting bracket (821) and extends to the left side of the mounting bracket (821). A limit hole (823) that cooperates with the limit rod (822) is provided in the middle of the mounting bracket (821).

4. The corrosion-resistant, bidirectional, adjustable, triple-eccentric metal hard-seal butterfly valve according to claim 1, characterized in that: A sealing gasket (824) is bonded to the outside of the pressure relief plate (811), and the sealing gasket (824) is made of rubber.

5. The corrosion-resistant, bidirectional, adjustable, triple-eccentric metal hard-seal butterfly valve according to claim 1, characterized in that: The pressure relief plate (811) is designed in the shape of a frustum, and the diameter of the left end of the pressure relief plate (811) is smaller than the diameter of the right end.

6. The corrosion-resistant, bidirectional, adjustable, triple-eccentric metal hard-seal butterfly valve according to claim 1, characterized in that: The right end of the pressure relief plate (811) is designed with a rounded surface.

7. The corrosion-resistant, bidirectional, adjustable, triple-eccentric metal hard-seal butterfly valve according to claim 1, characterized in that: The cleaning assembly includes a mounting plate (911). The mounting plate (911) is located on the right side of the pressure relief plate (811). Both ends of the mounting plate (911) are fixedly connected to scrapers (912). The pressure relief hole (812) is in contact with the right side surface of the pressure relief plate (811). The outer end of the scraper (912) is fixedly connected to a slider (913). The right end of the butterfly plate (2) is provided with a third groove (914) that cooperates with the slider (913). The slider (913) is engaged in the third groove (914). The middle part of the right end of the pressure relief plate (811) is fixedly connected to a spiral rod (915). The spiral rod (915) is inserted into the middle part of the mounting plate (911). The middle part of the mounting plate (911) is provided with a spiral groove that cooperates with the spiral rod (915).

8. The corrosion-resistant, bidirectional, adjustable, triple-eccentric metal hard-seal butterfly valve according to claim 1, characterized in that: The inner wall of the butterfly valve body (1) and the outer surface of the butterfly plate (2) are both provided with a corrosion-resistant coating, which is a nano-ceramic wear-resistant coating.

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