A new type of rubber-lined butterfly valve with strong corrosion resistance

Abstract

This invention discloses a novel rubber-lined butterfly valve with strong corrosion resistance, comprising a valve body, an internal disc plate, a valve stem extending through the top of the valve body near the center of the disc plate, a sealing ring surrounding the disc plate, and an annular pressure plate abutting the outer edge of the disc plate near the sealing ring. In operation, when the external sealing ring of the disc plate is damaged, rotating the threaded rod raises the bottom sealing plug, drawing in and recovering the oil from the compression groove. Simultaneously, the return spring causes multiple piston rods to be pulled out from the contact groove on one side of the pressure plate, allowing the pressure plate to be removed directly from the side. The damaged internal sealing ring can then be removed without disassembling the disc plate or other complex procedures. The overall operation is convenient, requiring no disassembly of the disc plate and valve stem, and minimizing the need for numerous disassembly tools, facilitating on-site disassembly.

Description

Technical Field

[0001] This invention relates to the field of butterfly valve technology, specifically to a novel rubber-lined butterfly valve with strong corrosion resistance. Background Technology

[0002] Currently, commonly used seawater-resistant butterfly valves achieve the purpose of preventing seawater corrosion by either using corrosion-resistant materials (such as copper alloys or stainless steel) to make the valve body and butterfly plate, or using a rubber lining to isolate the valve body and butterfly plate from the seawater medium. Both methods have their advantages and disadvantages.

[0003] CN105221762B discloses a seawater-resistant butterfly valve, which consists of a valve body, valve stem, butterfly plate, and worm gear assembly. The butterfly plate and valve body are coated with a rubber lining layer to prevent seawater corrosion and extend service life. The butterfly plate of this invention is optimized to effectively increase the flow area of ​​the butterfly valve and reduce fluid resistance. Appropriate butterfly plate sealing rings can be selected according to different working conditions to ensure that the valve will not produce internal leakage within a maintenance cycle.

[0004] However, it still has certain drawbacks in actual use. For example, when installing the sealing ring on the outside of the butterfly plate, it is only installed by fitting and locking it through the mounting groove. After a certain period of use, when the sealing ring is damaged, it needs to be disassembled from the valve body and the valve stem. Then, the sealing ring needs to be pried out of the mounting groove using tools, and then the new sealing ring needs to be pulled and locked into the mounting groove. The whole replacement is quite troublesome and inconvenient when replacing it on site, especially when replacing the sealing ring of some large-diameter butterfly valves, which reduces the overall replacement efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a novel rubber-lined butterfly valve with strong corrosion resistance, to solve the problem mentioned in the background art where the sealing ring on the outside of the butterfly plate is only installed by fitting it into the mounting groove. After a certain period of use, when the sealing ring is damaged, disassembly and replacement require disassembling the butterfly plate and valve stem from the valve body, then using tools to pry the sealing ring out of the mounting groove, and then pulling and fitting the new sealing ring into the mounting groove. This whole replacement is cumbersome and inconvenient for on-site replacement, especially for some large-diameter butterfly valves, which reduces the overall replacement efficiency.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a novel rubber-lined butterfly valve with strong corrosion resistance, comprising a valve body, wherein a disc is provided inside the valve body, a valve stem is provided through the top of the valve body at the middle position near the disc, a sealing ring is sleeved around the outside of the disc, and an annular pressure plate is attached to the outer edge of the disc near the sealing ring, and the parts of the valve body, the disc, and the pressure plate that are in contact with the medium are all covered with a rubber lining layer; a disassembly and assembly mechanism is provided on one side of the disc, and the function of the disassembly and assembly mechanism is to quickly disassemble and assemble the sealing ring on one side; the disassembly and assembly mechanism includes a liquid storage chamber, a threaded rod, a sealing plug, a squeezing groove, a guide groove, and an abutment. The valve includes a reservoir and a piston rod. The reservoir is pre-installed inside the valve rod, and a threaded rod is threadedly installed inside the top of the valve rod. A sealing plug is installed at the bottom of the threaded rod, and the sealing plug is slidably sealed to the inner wall of the reservoir. The contact groove is embedded and pre-installed at equal intervals around the inside of the pressure plate near the middle of the disc plate. The extrusion groove is embedded and pre-installed at equal intervals around the inside of the disc plate near the contact groove. Each extrusion groove near the contact groove has a pre-installed guide groove, and one end of the guide groove is connected to the outside of the disc plate near the pressure plate. The piston rod is slidably engaged inside the extrusion groove and the guide groove, and one end of the piston rod is inserted through the inside of one side of the contact groove.

[0007] Preferably, the sealing ring has a T-shaped cross-section, and the disc plate and the pressure plate have embedded grooves on their protruding surfaces near the sealing ring. The protruding surfaces of the sealing ring are engaged in the corresponding grooves. The disc plate has an embedded mounting groove at its top end near the valve stem. The bottom end of the valve stem is inserted into the mounting groove, and a pin is threaded between the valve stem and the disc plate.

[0008] By adopting the above technical solution, the sealing ring is designed with a T-shaped cross-section and is positioned by the slots on the pressure plate and disc side, thus preventing the sealing ring from falling off during use and maintaining a tight seal at all points.

[0009] Preferably, the disassembly and assembly mechanism further includes a first connecting cavity, a second connecting cavity, a through hole, a second connecting channel, a return spring, and a ball bearing. The first connecting cavity is embedded in the bottom end of the valve stem, the second connecting cavity is embedded in the inner wall of the bottom end of the mounting groove, and the through hole is connected between the outer bottom end of the valve stem and the inner wall of the bottom end of the first connecting cavity.

[0010] The above technical solution facilitates liquid flow during use through the design of the first and second connecting chambers. Furthermore, a sealing ring and a sealing groove can be pre-set at the interface between the bottom of the valve stem and the inner wall of the mounting groove to ensure the sealing performance of the first and second connecting chambers after they are connected, thus guaranteeing the overall performance.

[0011] Preferably, the valve stem is located between the liquid storage chamber and the first connecting chamber and is located away from the pin shaft, and a connecting channel 1 is pre-set inside the valve stem. The disc is located near the second connecting chamber, and a connecting channel 2 is pre-set inside the disc. One end of the connecting channel 2 is connected to one side of the second connecting chamber, and the other end of the connecting channel 2 is connected to one end of the extrusion groove.

[0012] The above technical solution facilitates smooth flow between the liquid inside the storage chamber and the connecting channel 2 during use.

[0013] Preferably, a return spring is sleeved on the outside of one side of the piston rod inside the extrusion groove, and the two ends of the return spring are respectively embedded in the inner wall of one side of the extrusion groove and the inner wall of one side of the piston rod. Ball bearings are rotatably embedded in the inner wall of the guide groove at equal intervals, and one side of the ball bearings is in contact with the outer surface of one side of the piston rod.

[0014] The above technical solution ensures that when the liquid inside the subsequent extrusion groove is drawn back during use, the piston rod rebounds quickly due to the return of the reset spring and the smooth rolling of the ball bearings. This causes one end of the piston rod to disengage from the inner part of the contact groove, making it easier to disassemble the pressure plate.

[0015] Preferably, a self-sealing mechanism is pre-installed between the first and second connecting cavities. The self-sealing mechanism includes a cavity column, a spherical rod, a compression spring, and a top rod. The cavity column is fixedly installed on the inner wall of the top side of the first connecting cavity, and the spherical rod is slidably engaged inside the bottom opening of the cavity column. The center of the sealing ball at the bottom of the spherical rod is on the same vertical line as the center of the through hole.

[0016] The above technical solution ensures that the ball rod can block the through hole after rebounding during use, thereby preventing the internal liquid from flowing out from the bottom after the valve stem is disassembled from the mounting groove, thus ensuring the overall performance.

[0017] Preferably, the top rod is fixedly installed on the bottom wall of the second guiding cavity near the spherical rod, and a compression spring is connected and installed between the outer surface of the top end of the spherical rod and the inner wall of the top end of the cavity column;

[0018] The above technical solution enables the valve stem to contact the ball rod during use through the contact of the push rod, thereby allowing the first and second connecting chambers to automatically connect and facilitating subsequent use.

[0019] Preferably, a sealing and isolating mechanism is provided between the inner wall of the pressure plate away from the sealing ring and the outer surface of the disc plate. The sealing and isolating mechanism includes a sealing ring, a sealing groove, an air bladder, and an air guiding channel. The sealing ring is embedded in the connection between the extrusion groove and the guide groove, and the piston rod passes through the sealing ring to slide and seal it. A sealing groove is embedded around the inner wall of the pressure plate away from the sealing ring. A circular air bladder is surrounded around the outer surface of the disc plate near the sealing groove. An air guiding channel is pre-set inside the disc plate near the air bladder, and the two ends of the air guiding channel are respectively connected to the inside of one side of the air bladder and the inside of the extrusion groove near the guide groove, so that the piston rod moves to squeeze the gas inside the extrusion groove into the air bladder.

[0020] By adopting the above technical solution, when the pressure plate and disc are installed and fitted, one side of the gap is sealed by the compression of the sealing ring, and the other side is sealed by the expansion of the airbag. This ensures the airtightness of the installation and fit between the pressure plate and disc, preventing seawater from entering the gap between the pressure plate and disc during use and entering the guide groove or abutment groove, which could cause corrosion inside the pressure plate and disc. This ensures the overall performance, extends the overall service life, and provides better overall corrosion resistance.

[0021] Preferably, a leakage monitoring mechanism is pre-installed on the bottom side of the valve body near the drain end. The leakage monitoring mechanism includes a collection box, a guide hole, a connecting carbon rod, a connecting iron rod, a warning light, a contact block, a push switch, an electromagnet, a guide rail, a moving block, a tension spring, an iron block, and a sealing plate. The collection box is installed on the bottom side of the valve body, and a guide hole is pre-installed between the inside of one side of the valve body and the inside of the top of the collection box. The connecting carbon rod and the connecting iron rod are both installed through the bottom of the collection box, and the warning light is installed on the outside of one side of the valve body. The connecting carbon rod and the connecting iron rod are both connected to the terminal of the warning light through wires.

[0022] The above technical solution ensures that when the sealing ring on one side of the disc is damaged during use, seawater on that side will seep out through the guide hole and enter the collection box. Because seawater contains high salt content, and the two metals with different reactivity levels, carbon rod and iron rod, come into contact with the seawater, a potential energy difference is generated, thus generating electricity. This causes the warning light on one side to light up, making it easier for staff to detect the leak in time and carry out timely repairs.

[0023] Preferably, the contact block is fixedly installed through the valve stem on the outer side near the top, the push switch is installed on the outer side of the valve body near the contact block, the guide rails are symmetrically installed on the inner walls of both sides of the collection box, the moving block is slidably engaged inside the guide rails on one side of the collection box, an iron block is installed at the end of the moving block outside the collection box, the electromagnet is installed on the outer side of the collection box near the iron block via a bracket, the electromagnet is electrically connected to and controlled by the push switch, the top of the sealing plate is slidably sealed and installed on the inner wall of the bottom end of the valve body near the guide hole, and the bottom end of the sealing plate is fixedly installed on the outer side of the top of the moving block, and tension springs are symmetrically connected between the outer surface of the moving block on the edge away from the iron block and the inner wall of the collection box on one side.

[0024] The above technical solution ensures that when the electromagnet is energized during use, it attracts and adheres the iron block and moving block on one side, thereby putting the top sealing plate in a retracted state. This allows leaked water to flow in through the guide hole, ensuring real-time monitoring. When the disc needs to be rotated to open, the contact block disengages from the push switch, de-energizing the electromagnet. In conjunction with the tension spring, the electromagnet retracts, automatically sealing the top sealing plate and preventing the warning light from malfunctioning during normal valve opening and drainage.

[0025] Compared with the prior art, the beneficial effects of the present invention are: this novel rubber-lined butterfly valve has strong corrosion resistance.

[0026] 1. When using this rubber-lined butterfly valve, if the outer sealing ring of the disc is damaged, rotating the threaded rod causes the bottom sealing plug to rise, thereby drawing and recovering the oil inside the compression groove. Simultaneously, the return spring causes multiple piston rods to be pulled out from the contact groove on one side of the pressure plate, allowing the pressure plate to be removed directly from the side. Then, the damaged internal sealing ring can be removed. This eliminates the need for disc disassembly and other complex procedures, making the overall operation convenient. It avoids the need to disassemble the disc and valve stem, and utilizes numerous disassembly tools, facilitating on-site disassembly. Furthermore, during installation, only the new sealing ring needs to be installed... The sealing ring is inserted into the slot, then the pressure plate is pressed tightly, and the threaded rod is reversed to evenly squeeze the internal oil into multiple extrusion grooves. This causes the piston rod to be pressed again and pressed into the contact groove of the pressure plate, thus completing the replacement and positioning of the pressure plate and sealing ring. This ensures the overall installation stability and makes the overall disassembly and assembly simple and easy. In addition, the T-shaped cross-section of the sealing ring and the slot positioning on one side of the pressure plate and disc plate ensure that the sealing ring will not fall off during use, maintaining a seal everywhere. At the same time, the pressing of the pressure plate can limit the deformation of the sealing ring to a controllable range, ensuring the performance of the product.

[0027] 2. When the rubber-lined butterfly valve is in use, the piston rod extends to position the pressure plate. At this time, the sealing ring inside the sealing and isolation mechanism seals one side of the compression groove. As the piston rod extends, the gas inside one side is forced into the annular air bladder through the air guide channel. This causes the air bladder to expand and fill the sealing groove. Thus, when the pressure plate and disc are installed together, one side of the gap is sealed by the compression of the sealing ring, and the other side is sealed by the expansion of the air bladder. This ensures the sealing performance of the pressure plate and disc, preventing seawater from entering the gap between the pressure plate and disc and entering the guide groove or the contact groove, which could cause corrosion inside the pressure plate and disc. This ensures the overall performance, extends the service life, and provides better overall corrosion resistance.

[0028] 3. When in use, the self-sealing mechanism utilizes a hollow column, ball rod, compression spring, and push rod to allow the valve stem to be inserted into the mounting groove on one side of the disc. The push rod on the inner wall of the mounting groove abuts against the ball rod, causing the ball rod to retract and compress the compression spring. This opens the through hole at the bottom of the first conduction chamber, automatically connecting the first and second conduction chambers for subsequent liquid supply. Simultaneously, during disassembly and maintenance, when the valve stem detaches from the mounting groove on one side of the disc, the compression spring rebounds and resets the ball rod, automatically sealing the through hole. This prevents liquid stored in the reservoir from flowing out from the bottom after disassembly, avoiding waste and ensuring overall performance. The entire valve is self-opening and self-closing.

[0029] 4. When this rubber-lined butterfly valve is in use, the leakage monitoring mechanism works in conjunction with the liquid collection box, guide hole, connecting carbon rod, connecting iron rod, and warning light. When the sealing ring on one side of the disc is damaged, seawater seeps out through the guide hole and enters the liquid collection box. Because seawater contains high salt content, and the two metals with different reactivity levels, the connecting carbon rod and connecting iron rod, come into contact with the seawater, a potential energy difference is generated, thus generating electricity, which causes the warning light on one side to light up. This makes it easy for staff to detect the leakage in time and carry out timely repairs. The overall performance is good.

[0030] 5. When in use, this rubber-lined butterfly valve utilizes the internal components of its leakage monitoring mechanism: an abutment block, a push-button switch, an electromagnet, a guide rail, a moving block, a tension spring, an iron block, and a sealing plate. When the disc is closed, the abutment block on one side contacts the push-button switch, energizing both the push-button switch and the electromagnet. This causes the iron block and the moving block on one side to adhere to each other, retracting the sealing plate at the top. This allows leaked water to flow in through the guide hole, ensuring real-time monitoring. When the disc needs to be rotated open, the abutment block disengages from the push-button switch, de-energizing the electromagnet. The tension spring then retracts the valve, automatically sealing the top sealing plate and preventing the warning light from malfunctioning during normal valve opening and drainage. This ensures the accuracy of overall monitoring and the overall effectiveness of the valve. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0032] Figure 2 This is a three-dimensional structural diagram of the disc and valve stem installation of the present invention;

[0033] Figure 3 This is a cross-sectional perspective view of the disassembly and assembly mechanism and disc mounting structure of the present invention.

[0034] Figure 4 For the present invention Figure 3 Enlarged structural diagram at point B;

[0035] Figure 5 This is a three-dimensional cross-sectional view of the installation of the threaded rod and the liquid storage cavity of the present invention;

[0036] Figure 6 This is a partial cross-sectional perspective view of the three-dimensional structure of the self-sealing mechanism and the conductive cavity of the present invention.

[0037] Figure 7 This is a top sectional view of the installation structure of the sealing ring and valve body of the present invention;

[0038] Figure 8 This is a top sectional view of the sealing and isolation mechanism and the pressure plate installation of the present invention;

[0039] Figure 9 This is a partial cross-sectional three-dimensional structural diagram of the leakage monitoring mechanism and valve body installation of the present invention;

[0040] Figure 10 For the present invention Figure 1 Enlarged structural diagram at point A in the middle.

[0041] In the diagram: 1. Valve body; 2. Disc; 3. Valve stem; 4. Sealing ring; 5. Pressure plate; 6. Slot; 7. Mounting slot; 8. Pin; 9. Disassembly / assembly mechanism; 901. Liquid storage chamber; 902. Threaded rod; 903. Conducting chamber one; 904. Connecting channel one; 905. Conducting chamber two; 906. Through hole; 907. Connecting channel two; 908. Sealing plug; 909. Extrusion groove; 9010. Guide groove; 9011. Contact groove; 9012. Piston rod; 9013. Return spring; 9014. Ball bearing; 10. Self-sealing mechanism; 1001. Hollow column; 1002. Spherical shape 1003. Rod; 1004. Compression spring; 1005. Top rod; 11. Sealing and isolation mechanism; 1106. Sealing ring; 1107. Sealing groove; 1108. Airbag; 1109. Air guide channel; 12. Leakage monitoring mechanism; 12001. Liquid collection box; 1201. Flow guide hole; 1202. Connecting carbon rod; 1203. Connecting iron rod; 1204. Warning light; 1205. Contact block; 1206. Press switch; 1207. Electromagnet; 1208. Guide rail; 12010. Moving block; 12011. Tension spring; 12012. Iron block; 12013. Sealing plate. Detailed Implementation

[0042] 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.

[0043] Please see Figure 1-10 This invention provides a technical solution: a novel rubber-lined butterfly valve with strong corrosion resistance, comprising a valve body 1, a disc 2 inside the valve body 1, a valve stem 3 extending through the top of the valve body 1 near the middle position of the disc 2, a sealing ring 4 surrounding the disc 2, and an annular pressure plate 5 attached to the outer edge of the disc 2 near the sealing ring 4. The parts of the valve body 1, the disc 2, and the pressure plate 5 that are in contact with the medium are all covered with a rubber lining layer; and a disassembly and assembly mechanism 9, which is located on one side of the disc 2, and whose function is to quickly disassemble and assemble the sealing ring 4 on one side.

[0044] In this embodiment, the new type of rubber-lined butterfly valve with strong corrosion resistance mainly includes a valve body 1, a disc 2, a valve stem 3, a pressure plate 5, and a disassembly and assembly mechanism 9. When the sealing ring 4 is damaged and needs to be replaced, the pressure plate 5 can be quickly disassembled through the disassembly and assembly mechanism 9. The overall disassembly and assembly is simple and easy, without the need to disassemble the disc 2 or other complicated procedures. The overall operation is convenient, without the need to disassemble the disc 2 and valve stem 3 or use many disassembly and assembly tools, which is convenient for on-site disassembly. At the same time, the disassembly and assembly mechanism 9 is embedded and will not be corroded by seawater immersion, resulting in good overall performance.

[0045] In some embodiments, the sealing ring 4 has a T-shaped cross section. The protruding surfaces of the disc plate 2 and the pressure plate 5 near the sealing ring 4 are both embedded with a pre-set groove 6, and the protruding surfaces of the sealing ring 4 are all engaged in the corresponding groove 6. The top of the disc plate 2 near the valve stem 3 is embedded with a pre-set mounting groove 7, the bottom end of the valve stem 3 is inserted into the mounting groove 7, and a pin 8 is threadedly installed between the valve stem 3 and the disc plate 2.

[0046] When using the whole, combine Figure 7 As shown, during use, the sealing ring 4 is T-shaped, and it engages with the grooves 6 on the protruding surfaces of the disc 2 and pressure plate 5 near the sealing ring 4. This ensures the stability of the installation of the sealing ring 4 and the disc 2, as well as the overall sealing performance. This prevents the sealing ring 4 from falling off during use, maintaining a tight seal. The pressure plate 5 also limits the deformation of the sealing ring 4 to a controllable range, ensuring the performance. The pin 8 is made of carbon steel, and a stainless steel ring can be installed around the inner wall of the valve body 1 near the sealing ring 4 during manufacturing. The sealing ring 4 is made of a seawater corrosion-resistant material, ensuring overall corrosion resistance.

[0047] In some embodiments, the disassembly and assembly mechanism 9 includes a liquid storage chamber 901, a threaded rod 902, a sealing plug 908, a compression groove 909, a guide groove 9010, an abutment groove 9011, and a piston rod 9012. The liquid storage chamber 901 is pre-installed inside the valve rod 3, and the threaded rod 902 is threadedly installed inside the top end of the valve rod 3. The bottom end of the threaded rod 902 is fitted with a sealing plug 908, which is in sliding sealing connection with the inner wall of the liquid storage chamber 901. The abutment groove 9011 is evenly embedded and surrounded inside the pressure plate 5 on one side near the middle position of the disc 2. The compression groove... The 909 is evenly spaced and embedded around the disc plate 2 on the side near the contact groove 9011. Each of the compression grooves 909 on the side near the contact groove 9011 has a pre-set guide groove 9010, and one end of the guide groove 9010 is connected to the outside of the disc plate 2 on the side near the pressure plate 5. The piston rod 9012 is slidably engaged inside the compression groove 909 and the guide groove 9010, and one end of the piston rod 9012 is inserted through the inside of one side of the contact groove 9011. The disassembly and assembly mechanism 9 also includes a first connecting cavity 903, a first connecting channel 904, a second connecting cavity 905, and a through hole 9. 06. Connecting channel 2 907, return spring 9013, and ball bearing 9014; First guiding cavity 903 is embedded in the bottom end of valve stem 3; Second guiding cavity 905 is embedded in the bottom inner wall of mounting groove 7; Through hole 906 connects the valve stem 3 between the bottom outer end of valve stem 3 and the bottom inner wall of first guiding cavity 903; Connecting channel 1 904 is pre-set inside the valve stem 3 on the side between liquid storage cavity 901 and first guiding cavity 903, away from pin 8; Connecting channel 2 907 is pre-set inside the disc 2 on the side near second guiding cavity 905, and the connecting channel... One end of the second 907 is connected to the inside of the second 905, and the other end of the second 907 is connected to one end of the extrusion groove 909; a return spring 9013 is sleeved on the outside of the piston rod 9012 inside the extrusion groove 909, and the two ends of the return spring 9013 are respectively embedded in the inner wall of one side of the extrusion groove 909 and the inner wall of one side of the piston rod 9012; ball bearings 9014 are rotatably embedded in the inner wall of the guide groove 9010 at equal intervals, and one side of the ball bearings 9014 is in contact with the outer surface of one side of the piston rod 9012;

[0048] During overall use, when the leakage monitoring mechanism 12 monitors the damage to the internal sealing ring 4 of the valve body 1, and when leakage occurs due to damage to the sealing ring 4, requiring replacement of the sealing ring 4, this is combined with... Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown;

[0049] First, the pressure plate 5 pressed on one side needs to be disassembled. Simply rotate the auxiliary handle at the top of the threaded rod 902 to make the threaded rod 902 rotate and rise, thereby driving the sealing plug 908 at the bottom to rise, thus generating a certain suction force, thereby drawing back the liquid filled in the multiple extrusion grooves 909. During the process of drawing back the liquid, the piston rod 9012 inside the extrusion groove 909 begins to move smoothly away from the contact groove 9011 due to the rebound and reset characteristics of the return spring 9013 on one side and the multiple ball bearings 9014 set in contact on the inner wall of the guide groove 9010. After moving a certain distance, the piston rod 9012 disengages from the inside of the contact groove 9011, thereby causing the pressure plate 5 to lose its limit, making it easy to remove the pressure plate 5 from the disc plate 2. Then, remove the sealing ring 4 that is in contact inside. The overall disassembly is convenient and does not require disassembling the disc plate 2 or other complicated procedures. The overall operation is relatively convenient and does not require disassembling the disc plate 2 and valve stem 3 or using many disassembly and assembly tools, making it easy to disassemble on site.

[0050] Next, the new sealing ring 4 is pressed into the groove 6. Then, the pressure plate 5 is aligned and pressed against the outside of one side of the sealing ring 4. Then, the threaded rod 902 is rotated in the opposite direction of the original disassembly, so that it begins to descend. This causes the bottom sealing plug 908 to descend, and the liquid inside the liquid storage chamber 901 is evenly pressed into the multiple extrusion grooves 909 through the connecting channel 1 904, the guiding cavity 1 903, the guiding cavity 2 905, and the connecting channel 2 907. This causes the piston rod 9012 inside the extrusion groove 909 to be hydraulically pressed and begin to move towards the contact groove 9011. This causes one end of the piston rod 9012 to evenly press into the contact groove 9011 inside one side of the pressure plate 5, thus completing the installation and positioning of the pressure plate 5. This completes the overall disassembly and replacement of the sealing ring 4, and the overall performance is good.

[0051] Meanwhile, the overall sealing performance is improved when the sealing ring 4 is pressed and installed by the cooperation of multiple contact grooves 9011 and piston rod 9012, as well as the annular pressure plate 5, thus ensuring the overall installation effect and stability.

[0052] In some embodiments, a self-sealing mechanism 10 is pre-installed between the first conductive cavity 903 and the second conductive cavity 905. The self-sealing mechanism 10 includes a cavity column 1001, a spherical rod 1002, a compression spring 1003, and a top rod 1004. The cavity column 1001 is fixedly installed on the inner wall of the top side of the first conductive cavity 903, and the spherical rod 1002 is slidably engaged inside the bottom opening end of the cavity column 1001. The center of the sealing ball at the bottom end of the spherical rod 1002 is on the same vertical line as the center of the through hole 906. The top rod 1004 is fixedly installed on the bottom wall of the second conductive cavity 905 near the spherical rod 1002. A compression spring 1003 is connected and installed between the outer surface of the top end of the spherical rod 1002 and the inner wall of the top end of the cavity column 1001.

[0053] When using the whole system, when installing the valve stem 3 into the mounting groove 7 on one side of the disc 2, combined with... Figure 2 , Figure 5 and Figure 6 As shown;

[0054] First, insert the bottom end of the valve stem 3 into the mounting groove 7 and press it down. When the ball-shaped rod 1002 on one side of the bottom end of the valve stem 3 abuts against the top rod 1004 on the inner wall of the bottom end of the mounting groove 7, continue to press down. At this time, the top rod 1004 presses the ball-shaped rod 1002 into the interior of the first connecting cavity 903, thereby disengaging the bottom end of the ball-shaped rod 1002 from the through hole 906 at the bottom end of the first connecting cavity 903. This allows the first connecting cavity 903 and the second connecting cavity 905 to be fully connected, facilitating the subsequent flow and transportation of liquid. The automatic connection results in good overall performance.

[0055] After the overall pressing is completed, the valve stem 3 and the disc 2 are installed and fixed together by the pin 8;

[0056] When the valve stem 3 and disc 2 need to be disassembled for maintenance, the pin 8 on one side is removed, and then the valve stem 3 is pulled up and lifted out of the mounting groove 7. During the removal process, through continuous lifting and the rebound of the internal compression spring 1003, the ball rod 1002 at the bottom rebounds and falls again, thereby blocking the through hole 906 at the bottom again. This automatically rebounds and seals the through hole 906, preventing the liquid stored in the liquid storage chamber 901 from flowing out from the bottom after disassembly, thus avoiding waste and ensuring the overall performance. The whole unit can open and close automatically.

[0057] In some embodiments, a sealing and isolating mechanism 11 is provided between the inner wall of the pressure plate 5 away from the sealing ring 4 and the outer surface of the disc 2. The sealing and isolating mechanism 11 includes a sealing ring 1101, a sealing groove 1102, an air bladder 1103, and an air guide channel 1104. The sealing ring 1101 is embedded in the conductive connection between the extrusion groove 909 and the guide groove 9010, and the sealing ring 1101 is slidably sealed and fitted inside by the piston rod 9012. The inner wall of the pressure plate 5 away from the sealing ring 4 is ring-shaped. A sealing groove 1102 is embedded around the disc plate 2. A circular airbag 1103 is arranged around the outer surface of the side of the disc plate 2 near the sealing groove 1102. An air guide channel 1104 is pre-set inside the side of the disc plate 2 near the airbag 1103. The two ends of the air guide channel 1104 are respectively connected to the inside of one side of the airbag 1103 and the inside of the side of the compression groove 909 near the guide groove 9010, so that the piston rod 9012 moves to squeeze the gas inside the side of the compression groove 909 into the airbag 1103.

[0058] During use, when the piston rod 9012 abuts against the inside of the contact groove 9011 on one side of the pressure plate 5 to fix the pressure plate 5, at this time... Figure 7 and Figure 8 As shown;

[0059] When the piston rod 9012 moves from the squeezing groove 909 to the contact groove 9011, the piston movement on one side of the piston rod 9012 squeezes the gas inside the squeezing groove 909 near the contact groove 9011 into the air guide channel 1104. Then, it is transported to the airbag 1103 through the air guide channel 1104, causing the airbag 1103 to expand. This causes the airbag 1103 to expand and fill the sealing groove 1102. As a result, when the pressure plate 5 and the disc 2 are installed and fitted, one side of the gap is sealed by the squeezing of the sealing ring 4, and the other side is sealed by the expansion of the airbag 1103. This ensures the sealing performance of the installation and fitting of the pressure plate 5 and the disc 2, preventing seawater from entering the gap between the pressure plate 5 and the disc 2 and entering the guide groove 9010 or the contact groove 9011 during use, which would cause corrosion inside the pressure plate 5 and the disc 2. This ensures the overall performance, extends the overall service life, and enhances the overall corrosion resistance.

[0060] At the same time, when the pressure plate 5 is disassembled, the piston rod 9012 retracts, which can retract the gas inside the airbag 1103, causing the airbag 1103 to collapse. This reduces the friction against the outer wall of the airbag 1103 when the pressure plate 5 is removed or installed, thus extending its service life. In addition, the annular design of the airbag 1103 makes the overall sealing effect better and more comprehensive.

[0061] In some embodiments, a leakage monitoring mechanism 12 is pre-installed on the bottom side of the valve body 1 near the drain end. The leakage monitoring mechanism 12 includes a collection box 1201, a guide hole 1202, a connecting carbon rod 1203, a connecting iron rod 1204, a warning light 1205, a contact block 1206, a push switch 1207, an electromagnet 1208, a guide rail 1209, a moving block 12010, a tension spring 12011, an iron block 12012, and a sealing plate 1201. 3. The liquid collection box 1201 is installed on one side of the bottom end of the valve body 1, and a guide hole 1202 is pre-set between the inside of one side of the valve body 1 and the inside of the top of the liquid collection box 1201. The connecting carbon rod 1203 and the connecting iron rod 1204 are both installed through the inside of the bottom end of the liquid collection box 1201, and the warning light 1205 is installed on the outside of one side of the valve body 1. The connecting carbon rod 1203 and the connecting iron rod 1204 are both connected to the terminal of the warning light 1205 through wires.

[0062] When using the whole, combine Figure 1 and Figure 9 As shown;

[0063] During use, when the sealing ring 4 on the outside of the disc 2 is damaged, seawater will flow out from the drain side of the valve. At this time, the seawater flows into the collection box 1201 through the guide hole 1202. When a certain volume of seawater is collected, the high salt content of the seawater and the contact between the two metals with different activity levels, carbon rod 1203 and iron rod 1204, will generate a potential energy difference, thereby generating electricity. This will cause the warning light 1205 on one side to light up, making it easier for staff to detect the leak in time and carry out timely repairs. The overall performance is good. After the staff has inspected and repaired the leak, they can open the existing drain valve connected to the bottom of the collection box 1201 to drain the water inside and turn off the warning light 1205, which will facilitate subsequent secondary monitoring.

[0064] In some embodiments, the abutment block 1206 is fixedly installed through the valve stem 3 on the outside near the top end; the push switch 1207 is installed on the valve body 1 on the outside near the abutment block 1206; the guide rails 1209 are symmetrically installed on the inner walls of both sides of the collection box 1201; the moving block 12010 is slidably engaged with the guide rails 1209 on one side of the collection box 1201; an iron block 12012 is installed at one end of the moving block 12010 located outside the collection box 1201; and the electromagnet 1208 is mounted on the collection box via a bracket. The outer side of the box 1201 near the iron block 12012 is controlled by an electromagnet 1208 and a push switch 1207. The top of the sealing plate 12013 is fitted and slidably sealed on the inner wall of the bottom end of the valve body 1 near the guide hole 1202. The bottom end of the sealing plate 12013 is fixedly installed on the outer side of the top of the moving block 12010. A tension spring 12011 is symmetrically connected between the outer surface of the moving block 12010 away from the iron block 12012 and the inner wall of the liquid collection box 1201.

[0065] When using the whole, combine Figure 9 and Figure 10 As shown;

[0066] When the butterfly valve needs to be opened to discharge seawater, the existing worm gear assembly drives the valve stem 3 to rotate, which in turn drives the bottom disc 2 to rotate. When the disc 2 rotates, the contact block 1206 on the outside of the valve stem 3 disengages from the existing external conductive control push switch 1207 on one side, causing the copper sheet inside the push switch 1207 to spring back, thus de-energizing the whole system and de-energizing the electromagnet 1208 on one side. When the electromagnet 1208 is de-energized and loses its electromagnetic attraction, it cooperates with the spring 12011 on one side to move the moving block 12010 on one side inside the guide rail 1209, thereby moving the sealing plate 12013 at the top, thus sealing the guide hole 1202 at the top. This prevents seawater from entering the collection box 1201 during normal drainage and triggering the internal monitoring elements, thus ensuring the orderly operation of the whole system.

[0067] When the butterfly valve finishes draining, the disc 2 rotates to its initial position, thus contacting the push switch 1207 again, energizing the electromagnet 1208. This causes the movable block 12010, on which the iron block 12012 is mounted, to be attracted, moved, and fitted together, thereby moving the sealing plate 12013 and opening the top guide hole 1202. This facilitates the re-monitoring of the overall sealing performance, resulting in good overall performance.

[0068] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0069] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel rubber-lined butterfly valve with strong corrosion resistance, comprising a valve body (1), characterized in that: The valve body (1) is provided with a disc plate (2) inside. A valve stem (3) is provided through the top of the middle position of the valve body (1) near the disc plate (2). A sealing ring (4) is provided around the outside of the disc plate (2). A circular pressure plate (5) is attached to the edge of the outer surface of the disc plate (2) near the sealing ring (4). The parts of the valve body (1), the disc plate (2) and the pressure plate (5) that are in contact with the medium are all covered with a rubber lining layer. The disassembly and assembly mechanism (9) is located on one side of the disc plate (2). The function of the disassembly and assembly mechanism (9) is to quickly disassemble and assemble the sealing ring (4) on one side. The disassembly and assembly mechanism (9) includes a liquid storage chamber (901), a threaded rod (902), a sealing plug (908), a squeezing groove (909), a guide groove (9010), an abutment groove (9011), and a piston rod (9012). The liquid storage chamber (901) is pre-installed inside the valve stem (3), and the threaded rod (902) is threaded through and installed inside the top end of the valve stem (3). A sealing plug (908) is installed at the bottom end of the threaded rod (902). The sealing plug (908) is in sliding sealing connection with the inner wall of the liquid storage chamber (901). The abutment groove (9011) is embedded and pre-installed around the pressure plate (5) at equal intervals. Inside the disc (2) near the middle position, the extrusion groove (909) is embedded and pre-set at equal intervals around the disc (2) near the contact groove (9011). The extrusion groove (909) near the contact groove (9011) is connected to a guide groove (9010), and one end of the guide groove (9010) is connected to the outside of the disc (2) near the pressure plate (5). The piston rod (9012) is slidably engaged inside the extrusion groove (909) and the guide groove (9010), and one end of the piston rod (9012) is inserted through the inside of the contact groove (9011).

2. The novel rubber-lined butterfly valve with strong corrosion resistance according to claim 1, characterized in that: The sealing ring (4) has a T-shaped cross section. The disc (2) and the pressure plate (5) have pre-embedded slots (6) on the protruding surfaces of the side near the sealing ring (4). The protruding surfaces of the sealing ring (4) are engaged in the corresponding slots (6). The disc (2) has a pre-embedded mounting groove (7) at the top of the side near the valve stem (3). The bottom end of the valve stem (3) is inserted into the mounting groove (7). A pin (8) is threaded between the valve stem (3) and the disc (2).

3. The novel rubber-lined butterfly valve with strong corrosion resistance according to claim 2, characterized in that: The disassembly and assembly mechanism (9) further includes a first guiding cavity (903), a first connecting channel (904), a second guiding cavity (905), a through hole (906), a second connecting channel (907), a return spring (9013), and a ball bearing (9014). The first guiding cavity (903) is embedded in the bottom end of the valve stem (3). The second guiding cavity (905) is embedded in the inner wall of the bottom end of the mounting groove (7). The through hole (906) is connected between the outer bottom end of the valve stem (3) and the inner wall of the bottom end of the first guiding cavity (903).

4. A novel rubber-lined butterfly valve with strong corrosion resistance according to claim 3, characterized in that: The valve stem (3) is located between the liquid storage chamber (901) and the first guiding chamber (903) and is located away from the pin (8) with a pre-set connecting channel 1 (904) inside. The disc (2) is located near the second guiding chamber (905) with a pre-set connecting channel 2 (907) inside. One end of the connecting channel 2 (907) is connected to the inside of the second guiding chamber (905) inside, and the other end of the connecting channel 2 (907) is connected to one end of the extrusion groove (909).

5. A novel rubber-lined butterfly valve with strong corrosion resistance according to claim 3, characterized in that: The piston rod (9012) is located inside the extrusion groove (909) and a return spring (9013) is sleeved on the outside of one side. The two ends of the return spring (9013) are respectively embedded in the inner wall of one side of the extrusion groove (909) and the inner wall of the piston rod (9012). The inner wall of the guide groove (9010) is rotatably embedded with balls (9014) at equal intervals, and one side of the balls (9014) is in contact with the outer surface of one side of the piston rod (9012).

6. A novel rubber-lined butterfly valve with strong corrosion resistance according to claim 3, characterized in that: A self-sealing mechanism (10) is pre-installed between the first (903) and the second (905) of the conductive cavity. The self-sealing mechanism (10) includes a cavity column (1001), a spherical rod (1002), a compression spring (1003), and a top rod (1004). The cavity column (1001) is fixedly installed on the inner wall of the top side of the first (903) of the conductive cavity, and the spherical rod (1002) is slidably engaged inside the bottom opening of the cavity column (1001). The center of the sealing ball at the bottom of the spherical rod (1002) is on the same vertical line as the center of the through hole (906).

7. A novel rubber-lined butterfly valve with strong corrosion resistance according to claim 6, characterized in that: The top rod (1004) is fixedly installed on the bottom wall of the second guide cavity (905) near the spherical rod (1002). A compression spring (1003) is installed between the outer surface of the top end of the spherical rod (1002) and the inner wall of the top end of the cavity column (1001).

8. A novel rubber-lined butterfly valve with strong corrosion resistance according to claim 1, characterized in that: A sealing and isolating mechanism (11) is provided between the inner wall of the pressure plate (5) away from the sealing ring (4) and the outer surface of the disc plate (2). The sealing and isolating mechanism (11) includes a sealing ring (1101), a sealing groove (1102), an air bladder (1103), and an air guide channel (1104). The sealing ring (1101) is embedded in the conductive connection between the extrusion groove (909) and the guide groove (9010), and the sealing ring (1101) is slidably sealed and fitted by the piston rod (9012) through it. The inner wall of the pressure plate (5) away from the sealing ring (4) is surrounded and embedded with... The disc (2) has a pre-set sealing groove (1102). A circular airbag (1103) is arranged around the outer surface of the side of the disc (2) near the sealing groove (1102). An air guide channel (1104) is pre-set inside the side of the disc (2) near the airbag (1103). The two ends of the air guide channel (1104) are respectively connected to the inside of one side of the airbag (1103) and the inside of the side of the compression groove (909) near the guide groove (9010), so that the piston rod (9012) moves to squeeze the gas inside the side of the compression groove (909) into the airbag (1103).

9. A novel rubber-lined butterfly valve with strong corrosion resistance according to claim 1, characterized in that: A leakage monitoring mechanism (12) is pre-installed on the bottom side of the valve body (1) near the drain end. The leakage monitoring mechanism (12) includes a collection box (1201), a guide hole (1202), a connecting carbon rod (1203), a connecting iron rod (1204), a warning light (1205), a contact block (1206), a push switch (1207), an electromagnet (1208), a guide rail (1209), a moving block (12010), a tension spring (12011), an iron block (12012), and a sealing plate (12013). The liquid collection box (1201) is installed on one side of the bottom end of the valve body (1), and a flow guide hole (1202) is pre-set between the inside of one side of the valve body (1) and the inside of the top of the liquid collection box (1201). The connecting carbon rod (1203) and the connecting iron rod (1204) are both installed through the inside of the bottom end of the liquid collection box (1201), and the warning light (1205) is installed on the outside of one side of the valve body (1). The connecting carbon rod (1203) and the connecting iron rod (1204) are both connected to the terminal of the warning light (1205) through wires.

10. A novel rubber-lined butterfly valve with strong corrosion resistance according to claim 9, characterized in that: The contact block (1206) is fixedly installed on the outside of the valve stem (3) near the top. The push switch (1207) is installed on the outside of the valve body (1) near the contact block (1206). The guide rails (1209) are symmetrically installed on the inner walls of both sides of the collection box (1201). The moving block (12010) is slidably engaged with the guide rails (1209) on one side of the collection box (1201). An iron block (12012) is installed at one end of the moving block (12010) outside the collection box (1201). The electromagnet (1208) is installed on the collection box via a bracket. The box (1201) is located on the outside of the side near the iron block (12012). The electromagnet (1208) is electrically connected to the push switch (1207) for control. The top of the sealing plate (12013) is fitted and slidably sealed on the inner wall of the bottom end of the valve body (1) near the guide hole (1202). The bottom end of the sealing plate (12013) is fixedly installed on the outside of the top side of the moving block (12010). A tension spring (12011) is symmetrically connected between the outer surface of the edge of the moving block (12010) away from the iron block (12012) and the inner wall of the liquid collection box (1201).

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