A gate valve with a valve core protection structure

Abstract

This invention relates to the field of gate valve technology, specifically to a gate valve with a valve core protection structure, comprising a valve disc, a valve core coaxially inserted within the valve disc, and operated vertically and coaxially by a valve stem. A sealing cover is provided at the top of the valve body, through which the valve stem slides, supported by a support column and mounting plate. A cylindrical seat is coaxially provided at the bottom of the valve core, with a sliding rod inserted around its outer circumference and equipped with a scraper. A first top spring keeps the valve core in contact with the inner wall of the valve disc, extending its lifespan. An isolation cover is coaxially provided at the bottom of the sealing cover; a semi-circular protective plate achieves isolation and sealing through hinges, protecting the bottom of the valve core. A top rod is connected to the bottom of the sealing cover via an L-shaped hanger, and has a gear system at its top, allowing the valve core to be raised and lowered via a handwheel. A first bevel is provided at the bottom of the valve core, forming a seal with a second bevel on the inner annular surface of the valve disc. This gate valve design features a reliable valve core protection structure, is suitable for various industrial applications, and ensures the safe and stable operation of fluid systems.

Description

Technical Field

[0001] This invention relates to the field of gate valve technology, and more particularly to a gate valve with a valve core protection structure. Background Technology

[0002] A gate valve is an industrial valve used to control the flow of fluid in pipelines. It gets its name from the closing element inside the valve, called the valve core or valve plate, which moves within the valve to open or close the pipeline. Gate valves belong to the category of linear motion valves; their operating mechanism involves raising or lowering the valve core to control the flow of fluid. Gate valves are frequently used in drainage and sewage management systems in high-temperature, high-pressure power systems and in the petrochemical industry. The valve core of a gate valve must withstand the erosion of high-temperature, high-pressure media while also ensuring a complete seal. The erosive and corrosive effects of the fluid medium on the valve core are significant, causing considerable damage and wear, thus reducing the service life of the gate valve.

[0003] A search revealed that CN117072694A discloses a valve that reduces the erosion corrosion of the valve core. This technical solution can use two sealing wheels to wrap the valve core when the valve is opened to connect the water circuit, so as to prevent the water flow from eroding the valve core. At the same time, when the valve is closed again, a layer of wax is evenly applied to the surface of the valve core to fill the pits caused by erosion on the valve core and ensure the sealing effect.

[0004] However, the applicant's research revealed the following problems with the proposed solution: First, the wax coating on the valve core surface would cause contamination when fluid flows inside the valve, and the wax would melt rapidly when high-temperature liquids flow. Second, the sealing wheel and valve core in the proposed solution do not meet the actual usage scenarios, thus limiting its application. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a shut-off valve with a valve core protection structure to solve the above-mentioned problems.

[0006] To achieve the above objectives, the present invention provides a shut-off valve with a valve core protection structure.

[0007] A shut-off valve with a valve core protection structure includes a valve body, an internal inlet for a valve disc, a valve core coaxially inserted inside the valve disc, a valve stem vertically coaxially positioned at the top of the valve core, a sealing cover at the top of the valve body, the valve stem slidingly passing through the top of the sealing cover, multiple supports evenly spaced in a circular array at the top of the valve body, each support topped with a common mounting plate, and an adjustment component for controlling the raising and lowering of the valve core at the top of the mounting plate, a cylindrical seat coaxially positioned at the bottom of the valve core, and multiple sliding rods equidistantly slidably inserted laterally on the outer circumference of the cylindrical seat, each sliding rod having a scraper at the end away from the valve core, the scraper ends slidingly abutting against the inner wall of the valve disc, and the sliding rods near the circular... A first top spring is fitted on the outer circumferential surface between the outer wall of the cylinder base and the scraper. An isolation cover is coaxially provided at the bottom of the sealing cover. Semicircular guard plates are symmetrically hinged at both ends of the bottom of the isolation cover. An L-shaped hanging seat is vertically symmetrically provided at the bottom of the sealing cover. A top rod is vertically slidably inserted into the lower part of the L-shaped hanging seat. A number of teeth are vertically and equidistantly provided on the outer circumferential surface of the top rod. Each tooth meshes with a gear. A rotating rod is horizontally and coaxially inserted into each gear. A hanging rod is symmetrically rotatably fitted on the outer circumferential surface of the rotating rod. The hanging rod is fixed to the bottom of the sealing cover. A disc is coaxially provided at both ends of the rotating rod. A pull rope is wound around the outer circumferential surface of each disc. The bottom end of each pull rope is connected to the side wall of the semicircular guard plate on the adjacent side.

[0008] Through the above technical solution, the first top spring ensures that the scraper is always in contact with the inner wall of the valve disc. When the valve core rotates and descends, it scrapes and cleans the inner wall of the valve disc, thereby effectively preventing the accumulation of impurities inside the valve disc, thus effectively extending the service life of the valve disc and ensuring a good sealing effect. Secondly, when the valve core rises, it abuts against the bottom of the top rod, causing the gear to drive the disc to rotate. When the disc rotates, it drives the semi-circular guard plate to rotate through the pull rope until the semi-circular guard plate merges and isolates and seals the bottom of the isolation cover. This allows the bottom parts of the valve core to be protected from fluid corrosion when the liquid flows inside the valve body, thus providing efficient protection for the valve core.

[0009] Furthermore, the adjustment assembly includes a first bevel gear rotatably connected to the top of the mounting plate, a second bevel gear meshing with the top of the first bevel gear, an adjustment rod coaxially inserted into the second bevel gear, a mounting cover rotatably sleeved on the outer circumference of the adjustment rod, the mounting cover being fixed to the top of the mounting plate, a handwheel at the end of the adjustment rod, and a square column portion openly formed on the upper part of the valve rod, the square column portion being coaxially and slidably inserted into the center of the first bevel gear.

[0010] The above technical solution utilizes a handwheel to drive the adjusting rod to rotate, which in turn drives the valve stem to rotate through the cooperation of the second bevel gear and the first bevel gear. When the valve stem rotates, it drives the valve core to rise and fall, thereby completing the shut-off or connection of the water passage by the valve body.

[0011] Furthermore, a first bevel is formed on the outer circumferential surface at the bottom of the valve core, and a second bevel is formed on the inner circumferential surface of the valve disc, with the second bevel and the first bevel having the same opening angle.

[0012] By using the above technical solution, the setting of the second bevel and the first bevel makes the contact surface form a seal when the valve core and the valve disc come into contact, thus improving the sealing effect.

[0013] Furthermore, a third bevel is provided at the bottom of each scraper, and the third bevel is opened at the same angle as the second bevel.

[0014] Through the above technical solution, the third bevel can be used to slide a certain distance towards the center of the cylindrical seat during the descent of the scraper, thereby enabling the scraper to smoothly enter the valve disc.

[0015] Furthermore, each of the top rods has a rounded protrusion at its bottom.

[0016] The above technical solution effectively reduces the friction of the push rod during the rotation of the valve core by utilizing the round bottom protrusion, thereby making it easier for the push rod to rise under pressure.

[0017] Furthermore, a sliding sleeve is provided on the top of the sealing cover, through which the valve stem slides.

[0018] The above technical solution utilizes a sliding sleeve to guide the movement of the valve stem.

[0019] Furthermore, a nut is provided on the top of the sealing cap, and the nut is threaded onto the outer circumferential surface of the valve stem.

[0020] The above technical solution utilizes a nut and valve stem to achieve a lifting and lowering effect as the valve stem rotates, thereby driving the valve core to lift and lower synchronously.

[0021] Furthermore, the valve stem is made of precipitation-hardening steel for high-temperature applications.

[0022] The above technical solution utilizes high-temperature precipitation-hardening steel to make the valve stem effectively resistant to high temperatures and corrosion, avoiding deformation caused by high temperatures.

[0023] Furthermore, each end of the slide bar is coaxially equipped with a limiting piece.

[0024] The above technical solution uses a limiting plate to restrict the movement position of the slide rod, preventing it from slipping.

[0025] Furthermore, each top rod is equipped with a second top spring, the top of which abuts against the bottom of the sealing cover.

[0026] The above technical solution utilizes a second top spring to automatically lower the top rod, thereby automatically opening the semi-circular guard plate when the bottom component of the valve core machine descends.

[0027] The beneficial effects of this invention are:

[0028] 1. The present invention utilizes a first top spring to keep the scraper in contact with the inner wall of the valve disc. When the valve core rotates and descends, it scrapes and cleans the inner wall of the valve disc, thereby effectively preventing the accumulation of impurities inside the valve disc, thus effectively extending the service life of the valve disc and ensuring the sealing effect.

[0029] 2. This invention utilizes the fact that when the valve core rises, it abuts against the bottom of the push rod, causing the gear to drive the disc to rotate. When the disc rotates, it drives the semi-circular guard plate to rotate through the pull rope until the semi-circular guard plate merges and isolates and seals the bottom of the isolation cover. This allows the valve core to be protected from fluid corrosion when the liquid flows inside the valve body, thus providing efficient protection for the valve core.

[0030] 3. The present invention utilizes the setting of the second bevel and the first bevel to form a seal on the contact surface when the valve core and the valve disc come into contact, thereby improving the sealing effect. The third bevel allows the scraper to slide a certain distance towards the center of the cylindrical seat during the descent, thus enabling the scraper to smoothly enter the interior of the valve disc. The round bottom protrusion can effectively reduce the friction of the push rod during the rotation of the valve core, thereby making it easier for the push rod to rise under pressure. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram of the internal cross-sectional structure of an embodiment of the present invention;

[0034] Figure 3 This is a schematic diagram of the bottom planar structure of the valve core according to an embodiment of the present invention;

[0035] Figure 4 Embodiments of the present invention Figure 2 A magnified schematic diagram of the local structure at point A;

[0036] Figure 5 Embodiments of the present invention Figure 2 A magnified schematic diagram of the local structure at point B;

[0037] Figure 6 This is a schematic diagram of the internal cross-sectional structure of an embodiment of the present invention;

[0038] Figure 7 Embodiments of the present invention Figure 3 A magnified schematic diagram of the local structure at point C;

[0039] Figure 8 This is a schematic diagram of the internal structure of the isolation cover according to an embodiment of the present invention;

[0040] Figure 9 Embodiments of the present invention Figure 6 A magnified schematic diagram of the local structure at point D;

[0041] Figure 10 This is a side view cross-sectional structural diagram of the valve body according to an embodiment of the present invention.

[0042] The diagram is marked as follows:

[0043] 1. Valve body; 2. Valve core; 201. First bevel; 3. Valve stem; 301. Square column; 4. Valve disc; 401. Second bevel; 5. Sealing cover; 6. Support column; 7. Mounting plate; 8. First bevel gear; 9. Second bevel gear; 10. Adjusting rod; 11. Handwheel; 12. Sliding sleeve; 13. Nut; 14. Cylindrical seat; 15. Sliding rod; 16. Scraper; 1601. Third bevel; 17. First top spring; 18. Limiting plate; 19. L-shaped hanger; 20. Top rod; 2001. Toothed part; 2002. Round bottom protrusion; 21. Hanging rod; 22. Rotating rod; 23. Disc; 24. Pull rope; 25. Second top spring; 26. Isolation cover; 27. Semi-circular guard plate; 28. Gear; 29. ​​Mounting cover. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0045] See Figures 1 to 10

[0046] A gate valve with a valve core protection structure includes a valve body 1, a valve disc 4 embedded in the valve body 1, a valve core 2 coaxially inserted inside the valve disc 4, a valve stem 3 vertically and coaxially mounted on the top of the valve core 2, a sealing cover 5 on the top of the valve body 1, the valve stem 3 slidingly passing through the top of the sealing cover 5, multiple support pillars 6 evenly distributed in a circular array on the top of the valve body 1, a common mounting plate 7 on the top of the support pillars 6, an adjustment component for controlling the lifting and lowering of the valve core 2 on the top of the mounting plate 7, and a cylindrical seat 14 coaxially mounted on the bottom of the valve core 2, the outer circumference of the cylindrical seat 14 sliding laterally at equal distances. Multiple sliding rods 15 are inserted, and each sliding rod 15 has a scraper 16 at the end away from the valve core 2. The ends of the scrapers 16 slide against the inner wall of the valve disc 4. A first top spring 17 is fitted on the outer circumference of each sliding rod 15 near the outer wall of the cylindrical seat 14 and the scraper 16. An isolation cover 26 is coaxially provided at the bottom of the sealing cover 5. Semi-circular guard plates 27 are symmetrically hinged at both ends of the bottom of the isolation cover 26. An L-shaped hanger 19 is vertically symmetrically provided at the bottom of the sealing cover 5. A top rod 20 is vertically slidably inserted at the lower part of the L-shaped hanger 19. A number of teeth are vertically and evenly spaced on the outer circumference of the top rod 20. Part 2001 and toothed part 2001 are both meshed with gears 28. Gears 28 are coaxially inserted with rotating rods 22 laterally. The outer circumference of the rotating rods 22 is symmetrically fitted with lifting rods 21. The lifting rods 21 are fixed to the bottom of the sealing cover 5. Both ends of the rotating rods 22 are coaxially provided with discs 23. Pull ropes 24 are wound around the outer circumference of the discs 23. The bottom end of the pull ropes 24 is connected to the side wall of the semi-circular guard plate 27 on the adjacent side. The first top spring 17 keeps the scraper 16 abutting against the inner wall of the valve disc 4. When the valve core 2 rotates and descends, it scrapes and cleans the inner wall of the valve disc 4. This effectively prevents impurities from accumulating inside the valve disc 4, thus extending the service life of the valve disc 4 and ensuring a good seal. Secondly, when the valve core 2 rises, it abuts against the bottom of the push rod 20, causing the gear 28 to drive the disc 23 to rotate. When the disc 23 rotates, it drives the semi-circular guard plate 27 to rotate through the pull rope 24 until the semi-circular guard plate 27 merges and seals the bottom of the isolation cover 26. This prevents the bottom parts of the valve core 2 from being corroded by the fluid when the liquid flows inside the valve body 1, thus providing efficient protection for the valve core 2.

[0047] For details, please refer to Figure 2 as well as Figure 5 The adjustment assembly includes a first bevel gear 8 rotatably connected to the top of the mounting plate 7, a second bevel gear 9 meshing with the top of the first bevel gear 8, an adjustment rod 10 coaxially inserted into the second bevel gear 9, a mounting cover 29 rotatably sleeved on the outer circumference of the adjustment rod 10, the mounting cover 29 being fixed to the top of the mounting plate 7, a handwheel 11 at the end of the adjustment rod 10, and a square column portion 301 openly formed on the upper part of the valve stem 3, the square column portion 301 being coaxially slidably inserted into the center of the first bevel gear 8. The handwheel 11 drives the adjustment rod 10 to rotate, which in turn drives the valve stem 3 to rotate through the cooperation of the second bevel gear 9 and the first bevel gear 8. When the valve stem 3 rotates, it drives the valve core 2 to rise and fall, thereby completing the shut-off or connection of the water passage of the valve body 1.

[0048] For details, please refer to Figure 4 The valve core 2 has a first bevel 201 on its bottom outer circumferential surface and a second bevel 401 on its inner circumferential surface. The second bevel 401 and the first bevel 201 have the same opening angle. By using the setting of the second bevel 401 and the first bevel 201, the valve core 2 and the valve disc 4 can form a seal on the contact surface when they come into contact, thereby improving the sealing effect.

[0049] For details, please refer to Figure 7 The bottom of the scraper 16 is provided with a third bevel 1601. The third bevel 1601 is opened at the same angle as the second bevel 401. The third bevel 1601 can be used to slide the scraper 16 a certain distance towards the center of the cylindrical seat 14 during the descent, so that the scraper 16 can smoothly enter the valve disc 4.

[0050] For details, please refer to Figure 9 The bottom of the push rod 20 is provided with a round bottom protrusion 2002. The round bottom protrusion 2002 can effectively reduce the friction of the push rod 20 during the rotation of the valve core 2, thereby making the push rod 20 easier to rise under pressure.

[0051] For details, please refer to Figure 6 The top of the sealing cover 5 is provided with a sliding sleeve 12, through which the valve stem 3 slides and passes. The sliding sleeve 12 guides the movement of the valve stem 3.

[0052] For details, please refer to Figure 6 as well as Figure 8 The top of the sealing cover 5 is provided with a nut 13, which is threaded onto the outer circumference of the valve stem 3. The nut 13 and the valve stem 3 cooperate to make the valve stem 3 rise and fall in rotation, thereby driving the valve core 2 to rise and fall synchronously.

[0053] For details, please refer to Figure 10 The valve stem 3 is made of high-temperature precipitation hardening steel. The use of high-temperature precipitation hardening steel can make the valve stem 3 effectively resistant to high temperature and corrosion, and avoid deformation caused by high temperature.

[0054] For details, please refer to Figure 7 Each end of the slide rod 15 is provided with a limiting piece 18 on the same axis. The limiting piece 18 is used to limit the movement position of the slide rod 15 and prevent it from slipping.

[0055] For details, please refer to Figure 9 Each top rod 20 is equipped with a second top spring 25. The top of the second top spring 25 abuts against the bottom of the sealing cover 5. The second top spring 25 causes the top rod 20 to automatically descend, and then the semi-circular guard plate 27 automatically opens when the bottom part of the valve core 2 machine descends.

[0056] This invention is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, substitutions, or improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A shut-off valve with a valve core protection structure, comprising a valve body (1), characterized in that, The valve body (1) has a valve disc (4) embedded in its internal water inlet. A valve core (2) is coaxially inserted inside the valve disc (4). A valve stem (3) is vertically coaxially mounted on the top of the valve core (2). A sealing cover (5) is mounted on the top of the valve body (1). The valve stem (3) slides through the top of the sealing cover (5). Multiple support columns (6) are distributed in an equidistant circular array on the top of the valve body (1). The same mounting plate (7) is mounted on the top of the support columns (6). An adjustment component for controlling the lifting and lowering of the valve core (2) is mounted on the top of the mounting plate (7). A cylindrical seat (14) is coaxially mounted on the bottom of the valve core (2). Multiple sliding rods (15) are equidistantly slidably inserted on the outer circumference of the cylindrical seat (14). A scraper (16) is mounted on the end of each sliding rod (15) away from the valve core (2). The ends of the scrapers (16) slide against the inner wall of the valve disc (4). The outer circumference of the sliding rod (15) near the position between the outer wall of the cylindrical seat (14) and the scraper (16) is... Each surface is fitted with a first top spring (17). The bottom of the sealing cover (5) is coaxially provided with an isolation cover (26). The bottom ends of the isolation cover (26) are symmetrically hinged with semi-circular guard plates (27). The bottom of the sealing cover (5) is vertically symmetrically provided with L-shaped hanging seats (19). The lower part of the L-shaped hanging seat (19) is vertically slidably inserted with a top rod (20). The outer circumference of the top rod (20) is provided with several teeth (2001) vertically at equal intervals. The teeth (2001) All gears (28) are meshed with each other. All gears (28) are coaxially inserted with rotating rods (22) in the transverse direction. All rotating rods (22) are symmetrically fitted with hanging rods (21) on their outer circumference. The hanging rods (21) are fixed to the bottom of the sealing cover (5). Both ends of the rotating rods (22) are coaxially provided with discs (23). All discs (23) are wrapped with pull ropes (24) on their outer circumference. The bottom end of each pull rope (24) is connected to the side wall of the semi-circular guard plate (27) on the adjacent side. When the valve core (2) rises, it can abut against the bottom of the push rod (20), causing the gear (28) to drive the disc (23) to rotate. When the disc (23) rotates, it drives the semi-circular guard plate (27) to rotate through the pull rope (24) until the semi-circular guard plate (27) merges and isolates and seals the bottom of the isolation cover (26), so that when the liquid flows inside the valve body (1), the valve core (2) and the bottom parts of the machine are protected from fluid corrosion.

2. A shut-off valve with a valve core protection structure according to claim 1, characterized in that, The adjustment assembly includes a first bevel gear (8) rotatably connected to the top of the mounting plate (7), a second bevel gear (9) meshing with the top of the first bevel gear (8), an adjustment rod (10) coaxially inserted into the second bevel gear (9), a mounting cover (29) rotatably sleeved on the outer circumference of the adjustment rod (10), the mounting cover (29) fixed to the top of the mounting plate (7), a handwheel (11) at the end of the adjustment rod (10), and a square column portion (301) openly opened on the upper part of the valve stem (3), the square column portion (301) being coaxially slidably inserted into the center of the first bevel gear (8).

3. A shut-off valve with a valve core protection structure according to claim 2, characterized in that, The valve core (2) has a first bevel (201) on its bottom outer circumferential surface, and the valve disc (4) has a second bevel (401) on its inner circumferential surface. The second bevel (401) and the first bevel (201) are opened at the same angle.

4. A shut-off valve with a valve core protection structure according to claim 3, characterized in that, The bottom of each scraper (16) is provided with a third bevel (1601), and the third bevel (1601) is opened at the same angle as the second bevel (401).

5. A shut-off valve with a valve core protection structure according to claim 4, characterized in that, The bottom end of each top rod (20) is provided with a round bottom protrusion (2002).

6. A shut-off valve with a valve core protection structure according to claim 5, characterized in that, The sealing cover (5) is provided with a sliding sleeve (12) at the top, and the valve stem (3) slides through the sliding sleeve (12).

7. A shut-off valve with a valve core protection structure according to claim 6, characterized in that, The sealing cap (5) is provided with a nut (13) on the top, and the nut (13) is threaded onto the outer circumference of the valve stem (3).

8. A shut-off valve with a valve core protection structure according to claim 7, characterized in that, Each end of the slide bar (15) is provided with a limiting piece (18) on the same axis.

9. A shut-off valve with a valve core protection structure according to claim 8, characterized in that, Each of the top rods (20) is provided with a second top spring (25), and the top of the second top spring (25) abuts against the bottom of the sealing cover (5).

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