Eccentric half ball valve with adjustable cushioning opening and closing mechanism

Abstract

The application relates to the technical field of ball valves, in particular to an eccentric half-ball valve with a buffer opening and closing mechanism convenient to adjust, which comprises a ball valve, a buffer opening and closing mechanism, a torsion mechanism and a top driving mechanism, the ball valve is fixedly connected with mounting flanges on both sides, the buffer opening and closing mechanism comprises side support rods, sliding blocks and hydraulic oil cylinders, connecting rods are hingedly arranged between the sliding blocks and the side support rods, pistons are slidably arranged in the hydraulic oil cylinders, the pistons are fixedly connected with sliding rods on the side edges, communicating side pipes are fixedly and communicatively arranged on the side walls of the hydraulic oil cylinders, adjusting cylinders are fixedly arranged on the communicating side pipes, conical heads are slidably arranged in the adjusting cylinders, the torsion mechanism is arranged on the upper side of the ball valve, and the top driving mechanism is arranged on the upper side of the torsion mechanism. The buffer opening and closing mechanism is arranged, the crank slider structure is combined with the hydraulic oil cylinder, the self-adaptive strengthening of buffer damping is realized, the rigid impact and water hammer effect during the closing of the valve disc are effectively inhibited, and the sealing surface is prevented from being abraded and deformed.

Description

Technical Field

[0001] This invention relates to the field of ball valve technology, and more particularly to an eccentric hemispherical valve with an adjustable buffer opening and closing mechanism. Background Technology

[0002] A ball valve is a mechanical valve that uses a spherical sealing body as its opening and closing element and rotates around its axis to open and close. Its core consists of components such as the valve body, valve disc (ball), valve seat, and valve stem. With its compact structure, rapid opening and closing, convenient operation, excellent sealing performance, and low fluid resistance, it is widely used in fluid control scenarios in many industries such as petroleum refining, long-distance pipelines, chemical industry, water supply and drainage, power, and municipal engineering.

[0003] However, in special applications such as high-pressure pipelines in petrochemicals, tailings transportation in mines, and high-pressure water transmission in large-scale water conservancy projects, the opening and closing mechanism of existing ball valves has significant drawbacks. Specifically, during the closing process of existing ball valves, when the valve disc rotates to the last small angle (usually 10°-15°), due to the lack of an effective buffer adjustment structure, the valve disc forms a wedge-shaped clamping state with the valve seat, generating an instantaneous rigid impact. This impact force is further amplified under water flow impact or high-pressure pipeline conditions. Long-term repeated wedge-shaped clamping impacts not only cause rapid wear and deformation of the sealing surfaces of the valve disc and valve seat, leading to problems such as increased sealing gaps and media leakage, but also exacerbate fatigue damage to components such as the valve stem and valve body, shortening the overall service life of the valve.

[0004] To address the aforementioned issues, we propose an eccentric hemispherical valve with an easily adjustable buffer opening and closing mechanism. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art by proposing an eccentric hemispherical valve with an adjustable buffer opening and closing mechanism.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An eccentric hemispherical valve with an adjustable buffer opening and closing mechanism includes a ball valve, a buffer opening and closing mechanism, a torsion mechanism, and a top drive mechanism. The ball valve has mounting flanges fixedly connected to both sides. The buffer opening and closing mechanism includes a side support rod, a slider, and a hydraulic cylinder. A connecting rod is hinged between the slider and the side support rod. A piston is slidably disposed inside the hydraulic cylinder, and a sliding rod is fixedly connected to the side of the piston. A connecting side pipe is fixedly installed on the side wall of the hydraulic cylinder, and an adjusting cylinder is fixedly installed on the connecting side pipe. A conical head is slidably disposed inside the adjusting cylinder. The torsion mechanism is disposed above the ball valve, and the top drive mechanism is disposed above the torsion mechanism.

[0008] Furthermore, the torsion mechanism includes a connecting plate, on which a rotating column is rotatably mounted. Several side guide tubes are fixedly mounted on the outer wall of the rotating column. A locking block is slidably mounted on the lower end of the side guide tube. A first compression spring is fixedly connected between the inner wall of the side guide tube and the upper end of the locking block. An inner circular hole is provided at the center of the rotating column. A column block is slidably disposed inside the inner circular hole. A cable is mechanically anchored between the upper end of the column block and the locking block. The cable slides through the side guide tube.

[0009] Furthermore, the top drive mechanism includes a sleeve, a rotating seat is provided on the outer side of the sleeve, an internal hexagonal groove is provided on the inner side of the sleeve, and an abutment post is fixedly installed on the inner side of the internal hexagonal groove, the outer diameter of the abutment post being adapted to the inner diameter of the inner circular hole.

[0010] Furthermore, a hemispherical valve disc is rotatably provided on the inner side of the ball valve, and a rotating shaft is fixedly connected to the upper side of the hemispherical valve disc. The rotating shaft is located in an eccentric position, and a hexagonal insertion hole is opened at the upper end of the rotating shaft. An annular groove is provided at the inner port of the ball valve, and an mounting ring seat is screwed onto the side of the annular groove. A valve port abutting ring seat is press-fitted between the mounting ring seat and the annular groove, and the valve port abutting ring seat abuts against the spherical surface of the hemispherical valve disc.

[0011] Furthermore, the buffer opening and closing mechanism also includes a structural side seat, on the upper side of which a guide groove is fixedly installed. The slider is slidably engaged in the inner side of the guide groove. The hydraulic cylinder is fixedly installed on the upper side of the structural side seat. A sealing cylinder cover is screwed onto the port of the hydraulic cylinder. The slide rod slides through the sealing cylinder cover. A connecting plate is fixedly connected to the end of the slide rod. The connecting plate is screwed onto the slider. The side support rod is fixedly connected to the side wall of the rotating column. The structural side seat is fixedly connected to the side wall of the disc.

[0012] Furthermore, a sealing cover is screwed onto the upper end of the adjusting cylinder, a rotating rod is rotatably mounted on the sealing cover, a nut is fixedly mounted on the upper end of the rotating rod, a cylinder is screwed onto the lower end of the rotating rod, a conical head is fixedly mounted on the bottom of the cylinder, a sealing ring is fixedly sleeved on the outer wall of the cylinder, convex heads are symmetrically arranged on the side wall of the cylinder, and guide grooves are symmetrically opened on the inner wall of the adjusting cylinder, with the convex heads slidingly engaging inside the guide grooves.

[0013] Furthermore, the torsion mechanism also includes a disc, which is fixedly connected to the upper side of the ball valve. A through hole is provided in the center of the disc. The connecting disc is screwed onto the upper side of the disc. A hexagonal socket is fixedly connected to the bottom of the rotating column. The hexagonal socket rotates through the through hole and fits into the inside of the hexagonal socket hole.

[0014] Furthermore, the upper side of the connecting plate is provided with several slots, which are arranged equidistantly in a circle. The inner circle of the slots is provided with cleaning marking lines. The slots are adapted to the card blocks. A pad is fixedly installed at the bottom of the inner circular hole. A second compression spring is fixedly installed on the upper side of the pad. A limit stop is fixedly installed at the center of the pad. The top of the second compression spring abuts against the bottom of the block. A movable circular block is fixedly connected to the upper side of the block. The movable circular block is slidably disposed inside the inner circular hole.

[0015] Furthermore, an external hexagonal surface is provided on the outer side of the upper end of the rotating column, and a limiting elongated hole is formed on the side wall of the external hexagonal surface.

[0016] Furthermore, a connecting round rod is fixedly connected between the sleeve and the rotating seat, and a limiting screw is screwed onto the side wall of the sleeve. The inner end of the limiting screw is provided with an arc head, which is adapted to the limiting elongated hole. The cross-sectional dimensions of the inner hexagonal groove are adapted to the cross-sectional dimensions of the outer hexagonal surface.

[0017] Compared with related technologies, the eccentric hemispherical valve with an easily adjustable buffer opening and closing mechanism proposed in this invention has the following advantages:

[0018] In this invention, an eccentric hemispherical valve with an easily adjustable buffer opening and closing mechanism is described. This mechanism combines a crank-slider structure with a hydraulic cylinder, using a rotating column as the power input. The crank rotates synchronously with the valve stem, driving the slider in reciprocating linear motion via a kinematic pair. Based on the kinematic characteristics of the crank-connecting rod, the linear motion rate of the slider is non-linearly coupled with the angular velocity of the valve stem. At the end of the valve's closing stroke, corresponding to the crank's limit angle range, the slider's linear feed rate passively increases. This drives the piston inside the hydraulic cylinder to rapidly compress the damping medium, causing an instantaneous increase in the flow rate of the hydraulic oil through the throttling channel. The fluid throttling pressure drop and viscous resistance increase simultaneously, achieving adaptive reinforcement of the buffer damping. This effectively suppresses the rigid impact and water hammer effect during valve disc closure, preventing wear and deformation of the sealing surface. Meanwhile, the adjusting cylinder on the side connecting pipe of the hydraulic cylinder can adjust the flow inner diameter of the throttling channel to achieve adjustable damping and adapt to different working conditions. Combined with the eccentrically set hemispherical valve disc, the valve shaft center is misaligned with the ball center. When opening and closing, the valve disc first separates from the valve seat to achieve frictionless rotation, and then wedges to press and seal at the end of the closure. It has the advantages of wear resistance, resistance to particulate slurry, and small opening and closing torque, thus extending the service life of the valve.

[0019] This invention discloses an eccentric hemispherical valve with an adjustable buffer opening and closing mechanism. Through a torsion mechanism, the hemispherical valve disc can be stably rotated and locked. When the rotating column rotates, it drives the internal hemispherical valve disc to rotate synchronously, meeting the valve's opening and closing adjustment requirements. The internal limiting block, under the elastic force of the first compression spring, can stably lock with the groove on the connecting plate. Under normal valve operation, this effectively restricts the rotation of the rotating column, keeping the hemispherical valve disc in a stable locked state, preventing accidental rotation due to high-speed water flow impact, and ensuring the valve's sealing performance. Unlocking is convenient; simply press down on the movable round block to push the column downwards, and then pull the locking block back to the inside of the side guide tube via the cable. After unlocking, the rotating column can be rotated for adjustment, achieving a forced unlocking function before valve adjustment. This simple operation effectively reduces the risk of misoperation.

[0020] This invention discloses an eccentric hemispherical valve with an adjustable buffer opening and closing mechanism. Through a top-drive mechanism, the internal hexagonal groove on the inner side of the sleeve and the abutment post form a special internal cross-section, serving as a dedicated unlocking and adjusting key for the rotating column. The structure is rationally designed. The sleeve fits snugly onto the outer side of the rotating column, and the inner abutment post simultaneously abuts against and presses downwards against the movable circular block, completing the unlocking action. Simultaneously, the internal hexagonal groove stably transmits torque, achieving integrated "unlocking-driving" operation and significantly improving adjustment efficiency. The dedicated key design effectively prevents unauthorized personnel from misoperating, improving the safety of the valve in special fields such as petrochemicals and high-pressure water transmission. Furthermore, multiple valves can share a single dedicated key, reducing equipment maintenance and management costs and enhancing ease of use. Attached Figure Description

[0021] Figure 1 A three-dimensional structural diagram of an eccentric hemispherical valve with an adjustable buffer opening and closing mechanism proposed in this invention. Figure 1 ;

[0022] Figure 2 A three-dimensional structural diagram of an eccentric hemispherical valve with an adjustable buffer opening and closing mechanism proposed in this invention. Figure 2 ;

[0023] Figure 3 This is a three-dimensional cross-sectional schematic diagram of an eccentric hemispherical valve with an adjustable buffer opening and closing mechanism proposed in this invention.

[0024] Figure 4 This is a three-dimensional cross-sectional schematic diagram of an eccentric hemispherical valve with an adjustable buffer opening and closing mechanism proposed in this invention.

[0025] Figure 5 This is a three-dimensional structural diagram of a hemispherical valve disc;

[0026] Figure 6This is a schematic diagram of a portion of the three-dimensional structure;

[0027] Figure 7 This is a schematic diagram of the three-dimensional disassembled structure of some components;

[0028] Figure 8 A three-dimensional structural diagram of the buffer opening and closing mechanism;

[0029] Figure 9 A three-dimensional, disassembled structural diagram of the buffer opening and closing mechanism;

[0030] Figure 10 Schematic diagram of the three-dimensional structure of some components of the buffer opening and closing mechanism Figure 1 ;

[0031] Figure 11 A three-dimensional disassembled structural diagram of some components of the buffer opening and closing mechanism;

[0032] Figure 12 Schematic diagram of the three-dimensional structure of some components of the buffer opening and closing mechanism Figure 2 ;

[0033] Figure 13 A three-dimensional cross-sectional diagram of some components of the buffer opening and closing mechanism;

[0034] Figure 14 This is a three-dimensional structural diagram of the torsion mechanism;

[0035] Figure 15 Schematic diagram of the three-dimensional disassembled structure of the torsion mechanism Figure 1 ;

[0036] Figure 16 Schematic diagram of the three-dimensional disassembled structure of the torsion mechanism Figure 2 ;

[0037] Figure 17 A three-dimensional cross-sectional schematic diagram of some components of the torsion mechanism;

[0038] Figure 18 A schematic diagram of the three-dimensional structure of some components of the torsion mechanism. Figure 1 ;

[0039] Figure 19 A schematic diagram of the three-dimensional structure of some components of the torsion mechanism. Figure 2 ;

[0040] Figure 20 Schematic diagram of the three-dimensional structure of the top drive mechanism Figure 1 ;

[0041] Figure 21 Schematic diagram of the three-dimensional structure of the top drive mechanism Figure 2 .

[0042] In the diagram: 1. Ball valve; 2. Mounting flange; 3. Hemispherical valve disc; 4. Rotary shaft; 5. Buffer opening and closing mechanism; 51. Structural side seat; 52. Side support rod; 53. Guide groove; 54. Slider; 55. Connecting rod; 56. Hydraulic cylinder; 57. Sealing cylinder cover; 58. Slide rod; 59. Connecting plate; 510. Piston; 511. Connecting side pipe; 512. Adjusting cylinder; 513. Sealing cover; 514. Rotating rod; 515. Rotary nut seat; 516. Cylindrical cylinder; 517. Conical head; 518. Sealing ring; 6. Torsion mechanism; 61. Disc; 62. Connecting disc; 63. Rotating column; 64. Hexagonal socket; 65. External hexagonal face; 66. Limiting elongated hole; 67. Internal circular hole; 68. Slot; 69. Cleaning / dirt marking line; 610. Side guide tube; 611. Locking block; 612. First compression spring; 613. Pull cable; 614. Movable circular block; 615. Column block; 616. Pad; 617. Second compression spring; 618. Limiting abutment post; 7. Top drive mechanism; 71. Sleeve; 72. Connecting circular rod; 73. Rotary seat; 74. Limiting screw; 75. Internal hexagonal groove; 76. Abutting post; 8. Ring groove; 9. Valve port abutting ring seat; 10. Mounting ring seat. Detailed Implementation

[0043] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0044] First embodiment: Please refer to the following: Figures 1-13 In the first embodiment of the present invention, an eccentric hemispherical valve with an adjustable buffer opening and closing mechanism includes a ball valve 1, a buffer opening and closing mechanism 5, a torsion mechanism 6, and a top drive mechanism 7. The ball valve 1 is fixedly connected to mounting flanges 2 on both sides. The buffer opening and closing mechanism 5 includes a side support rod 52, a slider 54, and a hydraulic cylinder 56. A connecting rod 55 is hinged between the slider 54 and the side support rod 52. A piston 510 is slidably disposed inside the hydraulic cylinder 56. A sliding rod 58 is fixedly connected to the side of the piston 510. A connecting side pipe 511 is fixedly installed on the side wall of the hydraulic cylinder 56. An adjusting cylinder 512 is fixedly installed on the connecting side pipe 511. A conical head 517 is slidably disposed inside the adjusting cylinder 512. The torsion mechanism 6 is disposed above the ball valve 1, and the top drive mechanism 7 is disposed above the torsion mechanism 6.

[0045] Through the above-described configuration, the assembly and linkage of the core valve mechanisms are achieved. The ball valve 1, as the main load-bearing component, has mounting flanges 2 on both sides that facilitate quick connection and installation of the valve in various pipelines, reducing installation difficulty. The side support rod 52, slider 54, connecting rod 55, and hydraulic cylinder 56 in the buffer opening and closing mechanism 5 constitute a complete buffer transmission structure. The connecting rod 55 enables the hinged linkage between the side support rod 52 and the slider 54. The piston 510 inside the hydraulic cylinder 56 cooperates with the slide rod 58 to transmit the hydraulic damping force to the slider 54, which in turn drives the torsion mechanism 6 through the side support rod 52. The connecting side pipe 511 cooperates with the adjusting cylinder 512 and the conical head 517 to flexibly adjust the size of the hydraulic throttling channel, achieving adjustable buffer damping and ensuring the buffering effect of valve opening and closing. The layered arrangement of the torsion mechanism 6 and the top drive mechanism 7 separates the driving and locking functions of valve opening and closing, improving operational stability.

[0046] In this method, a hemispherical valve disc 3 is rotatably provided on the inner side of the ball valve 1. A rotating shaft 4 is fixedly connected to the upper side of the hemispherical valve disc 3. The rotating shaft 4 is set in an eccentric position (the eccentric position is offset from the center of the ball). A hexagonal insertion hole is opened at the upper end of the rotating shaft 4. An annular groove 8 is provided at the inner port of the ball valve 1. An mounting ring seat 10 is screwed to the side of the annular groove 8. A valve port abutment ring seat 9 is pressed between the mounting ring seat 10 and the annular groove 8. The valve port abutment ring seat 9 abuts against the spherical surface of the hemispherical valve disc 3.

[0047] With the above configuration, the hemispherical valve disc 3 serves as the core opening and closing component of the valve. Its rotational cooperation with the ball valve 1 enables pipeline on / off control. The eccentrically positioned rotating shaft 4 misaligns its center with the center of the hemispherical valve disc 3, allowing the hemispherical valve disc 3 to first disengage from the valve port and abut against the annular seat 9 during opening and closing, rotating without friction, and then wedge-shaped to seal at the end, reducing wear on the sealing surface. The hexagonal socket at the upper end of the rotating shaft 4 facilitates precise docking with the hexagonal socket 64 of the torsion mechanism 6, enabling power transmission. The annular groove 8 provides installation positioning for the valve port abutment annular seat 9. The installation annular seat 10 can firmly press the valve port abutment annular seat 9 into the annular groove 8, ensuring stable contact between the valve port abutment annular seat 9 and the hemispherical valve disc 3, improving sealing performance, and facilitating the disassembly and replacement of the valve port abutment annular seat 9, reducing maintenance costs.

[0048] In this configuration, the buffer opening and closing mechanism 5 also includes a structural side seat 51. A guide groove 53 is fixedly installed on the upper side of the structural side seat 51. The slider 54 is slidably engaged in the inner side of the guide groove 53. A hydraulic cylinder 56 is fixedly installed on the upper side of the structural side seat 51. A sealing cylinder cover 57 is screwed onto the port of the hydraulic cylinder 56. A slide rod 58 slides through the sealing cylinder cover 57. A connecting plate 59 is fixedly connected to the end of the slide rod 58. The connecting plate 59 is screwed onto the slider 54. A side support rod 52 is fixedly connected to the side wall of the rotating column 63. The structural side seat 51 is fixedly connected to the side wall of the disc 61.

[0049] Through the above-described configuration, the structural side seat 51 serves as the mounting carrier for the buffer opening and closing mechanism 5, providing stable mounting support for the hydraulic cylinder 56 and guide groove 53, ensuring the firmness of the installation of each component; the guide groove 53 limits and guides the sliding of the slider 54, preventing the slider 54 from deviating during reciprocating motion and ensuring transmission accuracy; the sealing cylinder cover 57 seals the port of the hydraulic cylinder 56, preventing internal hydraulic oil leakage and ensuring the stable realization of the hydraulic damping function; the connecting plate 59 achieves a firm connection between the slide rod 58 and the slider 54, ensuring that the linear movement of the slide rod 58 can accurately drive the slider 54 to move; the fixed connection between the side support rod 52 and the rotating column 63, and the fixed connection between the structural side seat 51 and the disc 61, realize the linkage between the buffer opening and closing mechanism 5 and the torsion mechanism 6, enabling the buffer damping force to act precisely on the rotating column 63, thereby controlling the opening and closing buffer of the hemispherical valve 3.

[0050] In this method, a sealing cover 513 is screwed onto the upper end of the adjusting cylinder 512, and a rotating rod 514 is rotatably mounted on the sealing cover 513. A nut seat 515 is fixedly mounted on the upper end of the rotating rod 514, and a cylinder 516 is screwed onto the lower end of the rotating rod 514. A conical head 517 is fixedly mounted on the bottom of the cylinder 516, and a sealing ring 518 is fixedly sleeved on the outer wall of the cylinder 516. Protrusions are symmetrically arranged on the side wall of the cylinder 516, and guide grooves are symmetrically opened on the inner wall of the adjusting cylinder 512. The protrusions are slidably engaged with the inner side of the guide grooves.

[0051] Through the above-described configuration, the sealing cover 513 seals the upper end of the adjusting cylinder 512, preventing impurities from entering the interior of the adjusting cylinder 512 and affecting the sliding of the conical head 517, while ensuring the sealing performance of the hydraulic oil. The rotating nut 515 facilitates the operator to rotate the rotating rod 514. The rotating rod 514 is screwed into the cylinder 516, allowing the cylinder 516 to slide up and down along the adjusting cylinder 512 by rotating the rotating rod 514, thereby moving the conical head 517 and adjusting the throttling channel of the connecting side pipe 511, achieving adjustable damping. The sealing ring 518 on the outer wall of the cylinder 516 enhances the sealing between the cylinder 516 and the adjusting cylinder 512, preventing hydraulic oil leakage. The protrusion on the side wall of the cylinder 516 cooperates with the guide groove on the inner wall of the adjusting cylinder 512, limiting and guiding the sliding of the cylinder 516, preventing the cylinder 516 from rotating, ensuring that the conical head 517 can accurately adjust the size of the throttling channel, thereby adjusting the size of the buffer damping.

[0052] Second embodiment: Please refer to the following: Figures 14-19In this embodiment, the torsion mechanism 6 includes a connecting plate 62, a rotating column 63 is rotatably mounted on the connecting plate 62, a plurality of side guide tubes 610 are fixedly mounted on the outer wall of the rotating column 63, a locking block 611 is slidably mounted on the lower end of the side guide tube 610, a first compression spring 612 is fixedly connected between the inner wall of the side guide tube 610 and the upper end of the locking block 611, an inner circular hole 67 is provided in the center of the rotating column 63, a column block 615 is slidably arranged inside the inner circular hole 67, a cable 613 is mechanically anchored between the upper end of the column block 615 and the locking block 611, and the cable 613 slides through the side guide tube 610.

[0053] Through the above-described configuration, the connecting disc 62 provides rotational support for the rotating column 63, enabling the rotating column 63 to rotate stably and thus drive the hemispherical valve disc 3 to achieve opening and closing actions. The side guide tube 610 provides sliding installation space for the locking block 611. The first compression spring 612 applies a downward elastic force to the locking block 611, enabling the locking block 611 to stably engage with the slot 68 on the connecting disc 62, thereby locking the rotating column 63 and preventing accidental rotation. The inner circular hole 67 provides sliding space for the column block 615. The column block 615 is mechanically anchored to the cable 613. The downward movement of the column block 615 can drive the cable 613 to pull the locking block 611, thereby separating and engaging the locking block 611 with the slot 68, completing the unlocking and locking of the rotating column 63. The cable 613 slides through the side guide tube 610, ensuring the smooth transmission of the cable 613. The overall structure achieves stable locking and convenient unlocking of the rotating column 63, improving the stability of valve use.

[0054] In this method, the torsion mechanism 6 also includes a disc 61, which is fixedly connected to the upper side of the ball valve 1. A through hole is opened in the center of the disc 61. A connecting disc 62 is screwed onto the upper side of the disc 61. A hexagonal socket 64 is fixedly connected to the bottom of the rotating column 63. The hexagonal socket 64 rotates through the through hole and fits into the inside of the hexagonal socket.

[0055] With the above-described configuration, the disc 61 is fixed to the upper side of the ball valve 1, providing stable installation support for the connecting disc 62 and ensuring the overall robustness of the torsion mechanism 6. The through hole in the center of the disc 61 allows the hexagonal socket 64 to pass through, enabling the hexagonal socket 64 at the bottom of the rotating column 63 to precisely mate with the hexagonal socket at the upper end of the rotating shaft 4, thus realizing the power transmission between the rotating column 63 and the rotating shaft 4. This ensures that when the rotating column 63 rotates, it can synchronously drive the rotating shaft 4 and the hemispherical valve disc 3 to rotate, guaranteeing the synchronicity and accuracy of the valve opening and closing actions. The screw connection between the connecting disc 62 and the disc 61 facilitates the disassembly and maintenance of the torsion mechanism 6.

[0056] In this method, several slots 68 are evenly distributed on the upper side of the connecting plate 62. The slots 68 are arranged in a circumferentially equidistant and dense manner. The inner circle of the slots 68 is provided with a cleaning mark 69 (which corresponds to the 10° opening angle of the hemispherical valve disc 3). The guide tube 610 on the side wall of the rotating column 63 corresponds to the reference. Figure 14 As shown), the slot 68 is adapted to the card block 611. A pad 616 is fixedly installed at the bottom of the inner circular hole 67. A second compression spring 617 is fixedly installed on the upper side of the pad 616. A limit abutment 618 is fixedly installed at the center of the pad 616. The top of the second compression spring 617 abuts against the bottom of the column block 615. A movable circular block 614 is fixedly connected to the upper side of the column block 615. The movable circular block 614 is slidably disposed inside the inner circular hole 67.

[0057] Through the above-described configuration, several circumferentially equidistantly arranged slots 68 allow the locking block 611 to engage with the connecting plate 62 at different angles, thereby locking the rotating column 63 at different rotation angles and adapting to the fixing requirements of different opening degrees of the hemispherical valve disc 3. The cleaning mark 69 corresponds to the 10° opening angle of the hemispherical valve disc 3 and can serve as a reference for operators to adjust the valve opening degree. At this opening angle, the hemispherical valve disc 3 can form a small-angle misalignment gap with the valve port abutment ring 9. At this time, the liquid in the pipeline passes through quickly, which can carry away impurities at the mating surface of the valve port abutment ring 9, achieving an internal self-cleaning effect. The pad 616 provides support for the second compression spring 617 and the limiting abutment column 618. The mounting support and the second compression spring 617 apply an upward elastic force to the column block 615, allowing the column block 615 to drive the cable 613 to reset when no external force is applied. This keeps the locking block 611 engaged with the slot 68, achieving automatic locking of the rotating column 63. The limiting abutment 618 restricts the downward movement of the column block 615, preventing excessive downward movement of the column block 615 from over-compressing the second compression spring 617 and the first compression spring 612, thus ensuring the durability of the springs. The movable circular block 614 allows the operator to apply a downward force to move the column block 615 downward, completing the unlocking operation. The movable circular block 614 is slidably positioned inside the inner circular hole 67, ensuring the stability of the movement.

[0058] In this method, an external hexagonal surface 65 is provided on the outer side of the upper end of the rotating column 63, and a limiting elongated hole 66 is provided on the side wall of the external hexagonal surface 65.

[0059] With the above-mentioned configuration, the outer hexagonal surface 65 can be precisely matched with the inner hexagonal groove 75 of the top drive mechanism 7, ensuring that the top drive mechanism 7 can stably transmit torque and drive the rotating column 63 to rotate; the limiting elongated hole 66 matches the limiting screw 74 of the top drive mechanism 7, so that the sleeve 71 can be locked on the upper end of the rotating column 63, but at the same time, the sleeve 71 can have a distance that can be moved and pressed down on the upper end of the rotating column 63.

[0060] Third embodiment: Please refer to the following: Figures 20-21 In this embodiment, the top drive mechanism 7 includes a sleeve 71, a rotating seat 73 is provided on the outer side of the sleeve 71, an internal hexagonal groove 75 is provided on the inner side of the sleeve 71, and an abutment post 76 is fixedly installed on the inner side of the internal hexagonal groove 75. The outer diameter of the abutment post 76 is adapted to the inner diameter of the inner circular hole 67.

[0061] With the above-described configuration, the sleeve 71, as the core load-bearing component of the top drive mechanism 7, has an inner hexagonal groove 75 that precisely matches the outer hexagonal surface 65 at the upper end of the rotating column 63, ensuring that the sleeve 71 can stably drive the rotating column 63 to rotate when it rotates, thus achieving stable power transmission. The outer diameter of the abutment pin 76 is adapted to the inner diameter of the inner circular hole 67, allowing the abutment pin 76 to be inserted into the inner circular hole 67 of the rotating column 63. The abutment pin 76 can also abut against and press down on the movable circular block 614 to achieve the unlocking action. The rotating seat 73 makes it easy for the operator to hold and rotate the sleeve 71, realizing the integrated operation of "unlocking-driving" and improving the convenience of valve adjustment. At the same time, the exclusive cooperation between the sleeve 71 and the rotating column 63 forms a dedicated unlocking and adjustment structure, improving the safety of valve use.

[0062] In this method, a connecting rod 72 is fixedly connected between the sleeve 71 and the rotating seat 73. A limiting screw 74 is screwed onto the side wall of the sleeve 71. The inner end of the limiting screw 74 is provided with an arc head, which is adapted to the limiting elongated hole 66. The cross-sectional dimensions of the inner hexagonal groove 75 are adapted to the cross-sectional dimensions of the outer hexagonal surface 65.

[0063] Through the above-described configuration, the connecting rod 72 securely connects the sleeve 71 and the rotating base 73, ensuring that the rotating base 73 can synchronously drive the sleeve 71 to rotate, thus guaranteeing the stability of power transmission. The screw connection between the limiting screw 74 and the sleeve 71 allows the inner arc head of the limiting screw 74 to be inserted into the limiting elongated hole 66 of the rotating column 63 by adjusting its position, so that the sleeve 71 can be locked at the upper end of the rotating column 63. At the same time, the sleeve 71 can have a distance at the upper end of the rotating column 63 that can be moved and pressed down, which facilitates the pressing of the inner abutment post 76 of the sleeve 71 to complete the unlocking action of the column block 615. The cross-sectional dimensions of the inner hexagonal groove 75 and the outer hexagonal surface 65 are matched to ensure that the two fit tightly, improve the stability of torque transmission, and avoid slippage.

[0064] It should be further explained that, among the above components, the ball valve 1, as the main load-bearing structure, has mounting flanges 2 on both sides that adopt existing standard flange structures, which can be precisely connected to existing pipeline flanges to achieve rapid installation and fixation of the valve; the hemispherical valve disc 3 is made of wear-resistant alloy material, and its eccentrically positioned rotating shaft 4 is connected to the inner wall of the ball valve 1 through existing sealed bearings, which not only ensures the smooth rotation of the hemispherical valve disc 3, but also effectively prevents media leakage; the structural side seat 51 in the buffer opening and closing mechanism 5 is firmly connected to the disc 61 by bolts, and the sliding fit between the guide groove 53 and the slider 54 adopts existing sliding pairs. The structure features wear-resistant bushings at the hinges of connecting rod 55, side support rod 52, and slider 54. The hydraulic cylinder is filled with conventional hydraulic oil as a damping medium. A sealing gasket is installed at the threaded connection between the sealing cylinder cover 57 and the hydraulic cylinder 56 to further enhance sealing performance. The connection between the connecting side pipe 511 and the hydraulic cylinder 56 and adjusting cylinder 512 is sealed by welding. The conical head 517 inside the adjusting cylinder 512 precisely corresponds to the port of the connecting side pipe 511. The effective flow area of ​​the throttling channel can be precisely adjusted by the up-and-down movement of the conical head 517. The disc 61 in the torsion mechanism 6 is welded... The connection method is fixed on the upper side of the ball valve 1. The screw connection between the connecting plate 62 and the disc 61 adopts the existing bolt connection structure. A sealing washer is placed at the screw connection to ensure sealing. The rotating column 63 and the connecting plate 62 are rotated through the existing rolling bearing. The side guide tube 610 is fixed to the rotating column 63 by welding. The first compression spring 612 and the second compression spring 617 are both made of durable stainless steel. The cable 613 is made of high-strength steel wire rope. Its mechanical anchoring connection with the column block 615 and the clamping block 611 adopts the existing steel wire rope anchoring process. The pad 616 is fixed to the bottom of the inner circular hole 67 by bolts. The limiting abutment 618 and the pad 616 adopt an integrated molding structure. The movable round block 614 and the column block 615 are fixed by welding. The slot 68 on the connecting plate 62 and the contact surface of the locking block 611 are both treated with wear resistance. The connecting round rod 72, sleeve 71, and rotating seat 73 in the top drive mechanism 7 are all fixed by welding. The limiting screw 74 adopts existing standard bolts, and its inner arc head is rounded to avoid scratching the inner wall of the limiting elongated hole 66. The fixing of the abutment insertion post 76 and the sleeve 71 is done by welding, and its end is rounded to facilitate insertion into the inner round hole 67 and pressing down the movable round block 614. The connection method, material selection, and basic structure of the above components are all existing technical means. Those skilled in the art can make conventional adjustments and adaptations to their specifications and dimensions according to actual working conditions, and can achieve normal assembly and functional performance of each component without creative labor.

[0065] The working principle of the eccentric hemispherical valve with an easily adjustable buffer opening and closing mechanism provided by this invention is as follows:

[0066] The working principle of this invention mainly revolves around the coordinated linkage of the buffer opening and closing mechanism 5, the torsion mechanism 6, and the top drive mechanism 7, with the core function of achieving safe opening and closing, buffer adjustment, and stable locking of the valve. Before adjustment, the operator needs to place the sleeve 71 of the top drive mechanism 7 onto the upper end of the rotating column 63 of the torsion mechanism 6, so that the inner hexagonal groove 75 of the sleeve 71 is precisely fitted with the outer hexagonal surface 65 of the rotating column 63. At the same time, the abutment pin 76 inside the sleeve 71 is inserted into the inner circular hole 67 of the rotating column 63. The limiting screw 74 is adjusted so that the arc head is engaged in the limiting elongated hole 66 of the rotating column 63, thus achieving the initial fixation of the sleeve 71 and the rotating column 63, while retaining space for the sleeve 71 to move downwards, completing the preparatory work before adjustment.

[0067] When adjusting the valve opening and closing, the operator holds the rotary seat 73 and presses the sleeve 71 downwards, causing the abutment pin 76 to press down on the movable block 614 inside the inner circular hole 67. The movable block 614 pushes the column block 615 to compress the second compression spring 617 and move it downwards. The column block 615 pulls the locking block 611 inside the side guide tube 610 through the cable 613 to compress the first compression spring 612, causing the locking block 611 to disengage from the locking groove 68 on the connecting plate 62, thus unlocking the torsion mechanism 6. Then, the rotary seat 73 is rotated to... The connecting rod 72 drives the sleeve 71 to rotate. The sleeve 71 drives the rotating column 63 to rotate through the cooperation of the inner hexagonal groove 75 and the outer hexagonal surface 65. The hexagonal socket 64 at the bottom of the rotating column 63 drives the rotating shaft 4 and the hemispherical valve disc 3 inside the ball valve 1 to rotate synchronously. The eccentrically set rotating shaft 4 causes the hemispherical valve disc 3 to first separate from the valve port and abut against the ring seat 9 to rotate without friction, thereby realizing the opening or closing of the valve. The cleaning mark 69 can be used as a reference for the opening angle of the hemispherical valve disc 3. At this time, the fluid carries away the impurities in the valve port through the gap, realizing self-cleaning.

[0068] During the opening and closing process, the buffer opening and closing mechanism 5 works synchronously. When the rotating column 63 rotates, it drives the side support rod 52 to rotate synchronously on a fixed axis. The side support rod 52 drives the slider 54 to make reciprocating linear motion in the guide groove 53 of the structural side seat 51 through the connecting rod 55. The slider 54 drives the slide rod 58 and piston 510 to slide in the hydraulic cylinder 56 through the connecting plate 59. The hydraulic oil flows through the small diameter pipe of the connecting side pipe 511, forming a hydraulic damping effect. In the final stage of valve closure, the crank's limit angle causes the slider 54 to increase its feed rate, and the piston 510 quickly... The hydraulic fluid is rapidly compressed and flows through the connecting side pipe 511 and the adjusting cylinder 512. The fluid throttling pressure drop and viscous resistance increase simultaneously, achieving adaptive reinforcement of the buffer damping. This effectively suppresses the rigid impact and water hammer effect when the valve disc closes. After adjustment, the sleeve 71 is released, the second compression spring 617 pushes the column block 615 to reset, the cable 613 loosens, and the first compression spring 612 pushes the locking block 611 into the corresponding slot 68, locking the rotating column 63. The hemispherical valve disc 3 remains stably in its current state, completing the entire opening and closing adjustment process. It should be noted that the throttling channel size adjustment of the connecting side pipe 511 is a separate working condition adaptation function. According to actual operating conditions, the operator can rotate the rotating nut 515 to drive the rotating rod 514 to rotate, causing the cylinder 516 to move the conical head 517 up and down along the adjusting cylinder 512, thereby adjusting the throttling channel size and achieving adaptive adjustment of the buffer damping.

[0069] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. An eccentric hemispherical valve with an easily adjustable buffer opening and closing mechanism, characterized in that, include: A ball valve (1) is fixedly connected to two mounting flanges (2) on both sides. A buffer opening and closing mechanism (5) includes a side support rod (52), a slider (54) and a hydraulic cylinder (56). A connecting rod (55) is hinged between the slider (54) and the side support rod (52). A piston (510) is slidably arranged inside the hydraulic cylinder (56). A sliding rod (58) is arranged on the side of the piston (510). A connecting side pipe (511) is connected to the side wall of the hydraulic cylinder (56). An adjusting cylinder (512) is arranged on the connecting side pipe (511). A conical head (517) is slidably arranged inside the adjusting cylinder (512). Torsion mechanism (6), which is disposed on the upper side of ball valve (1); A top drive mechanism (7) is disposed on the upper side of the torsion mechanism (6).

2. The eccentric hemispherical valve with an easily adjustable buffer opening and closing mechanism according to claim 1, characterized in that, The torsion mechanism (6) includes a connecting plate (62), on which a rotating column (63) is rotatably mounted. Several side guide tubes (610) are provided on the outer wall of the rotating column (63). A locking block (611) is slidably mounted on the lower end of the side guide tube (610). A first compression spring (612) is provided between the inner wall of the side guide tube (610) and the upper end of the locking block (611). An inner circular hole (67) is provided in the center of the rotating column (63). A column block (615) is slidably mounted inside the inner circular hole (67). A cable (613) is mechanically anchored between the upper end of the column block (615) and the locking block (611). The cable (613) slides through the side guide tube (610).

3. The eccentric hemispherical valve with an easily adjustable buffer opening and closing mechanism according to claim 1, characterized in that, The top drive mechanism (7) includes a sleeve (71), a rotating seat (73) is provided on the outer side of the sleeve (71), an internal hexagonal groove (75) is provided on the inner side of the sleeve (71), and an abutment post (76) is provided on the inner side of the internal hexagonal groove (75).

4. The eccentric hemispherical valve with an easily adjustable buffer opening and closing mechanism according to claim 1, characterized in that, The ball valve (1) has a rotatable hemispherical valve disc (3) on its inner side. A rotating shaft (4) is provided on the upper side of the hemispherical valve disc (3). The rotating shaft (4) is located at an eccentric position. A hexagonal insertion hole is provided at the upper end of the rotating shaft (4). An annular groove (8) is provided at the inner port of the ball valve (1). An mounting ring seat (10) is provided on the side of the annular groove (8). A valve port abutting ring seat (9) is press-fitted between the mounting ring seat (10) and the annular groove (8). The valve port abutting ring seat (9) abuts against the spherical surface of the hemispherical valve disc (3).

5. An eccentric hemispherical valve with an easily adjustable buffer opening and closing mechanism according to claim 1, characterized in that, The buffer opening and closing mechanism (5) also includes a structural side seat (51), a guide groove (53) is provided on the upper side of the structural side seat (51), the slider (54) is slidably engaged in the inner side of the guide groove (53), the hydraulic cylinder (56) is provided on the upper side of the structural side seat (51), a sealing cylinder cover (57) is provided at the port of the hydraulic cylinder (56), the slide rod (58) slides through the sealing cylinder cover (57), and a connecting plate (59) is provided between the end of the slide rod (58) and the slider (54).

6. An eccentric hemispherical valve with an easily adjustable buffer opening and closing mechanism according to claim 1, characterized in that, The upper end of the adjusting cylinder (512) is provided with a sealing cover (513), and a rotating rod (514) is rotatably mounted on the sealing cover (513). The upper end of the rotating rod (514) is provided with a nut seat (515), and the lower end of the rotating rod (514) is provided with a cylinder (516). The conical head (517) is provided at the bottom of the cylinder (516). A sealing ring (518) is sleeved on the outer wall of the cylinder (516). Protrusions are symmetrically arranged on the side wall of the cylinder (516). Guide grooves are symmetrically opened on the inner wall of the adjusting cylinder (512). The protrusions are slidably engaged with the inner side of the guide groove.

7. An eccentric hemispherical valve with an easily adjustable buffer opening and closing mechanism according to claim 2, characterized in that, The torsion mechanism (6) also includes a disc (61), which is located on the upper side of the ball valve (1). A through hole is provided in the center of the disc (61). The connecting disc (62) is located on the upper side of the disc (61). A hexagonal socket (64) is provided at the bottom of the rotating column (63).

8. An eccentric hemispherical valve with an easily adjustable buffer opening and closing mechanism according to claim 2, characterized in that, The upper side of the connecting plate (62) is provided with a number of slots (68), which are arranged in a circumferentially equidistant and dense manner. The inner circle of the slot (68) is provided with a cleaning mark (69). The slot (68) is adapted to the card block (611). The bottom of the inner circular hole (67) is provided with a pad (616). The upper side of the pad (616) is provided with a second compression spring (617). The center of the pad (616) is provided with a limit stop (618). The top of the second compression spring (617) abuts against the bottom of the column block (615). The upper side of the column block (615) is provided with a movable round block (614), which is slidably disposed inside the inner circular hole (67).

9. An eccentric hemispherical valve with an easily adjustable buffer opening and closing mechanism according to claim 2, characterized in that, The upper outer side of the rotating column (63) is provided with an external hexagonal surface (65), and a limiting elongated hole (66) is provided on the side wall of the external hexagonal surface (65).

10. An eccentric hemispherical valve with an easily adjustable buffer opening and closing mechanism according to claim 3, characterized in that, A connecting rod (72) is provided between the sleeve (71) and the rotating seat (73). A limiting screw (74) is provided on the side wall of the sleeve (71), and an arc head is provided on the inner end of the limiting screw (74).

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