A bidirectional sealing valve device

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By designing wedges and sealing plates, continuous friction of the seals is avoided. Combined with anti-caking and polishing components, the wear problem of existing valve seals is solved, thereby improving the sealing effect and extending the valve life.

CN121229646BActive Publication Date: 2026-07-14WUXI YADI FLUID CONTROL TECH CO LTD

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Patent Information

Authority / Receiving Office: CN · China
Patent Type: Patents(China)
Current Assignee / Owner: WUXI YADI FLUID CONTROL TECH CO LTD
Filing Date: 2025-09-30
Publication Date: 2026-07-14

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Abstract

The application relates to the technical field of valves, and discloses a bidirectional sealing valve device, which comprises a valve body, two plate seats are arranged in the valve body, and a sliding plate is slidably connected between the two plate seats; a sealing assembly is arranged on the sliding plate, the sealing assembly comprises two sealing plates; an anti-caking assembly is arranged on the sliding plate and is used for preventing caking in a flow hole of the sliding plate. Through the arrangement of the sealing assembly, when a flow channel is closed, the two sealing plates tightly abut against two second sealing rings respectively, complete sealing of flow holes of the two plate seats is realized, the sealing plates only move outward and contact the second sealing rings when the sliding plate is about to be positioned, continuous friction between the sealing plates and the second sealing rings and the plate seats is avoided, the abrasion of the sealing plates is greatly reduced, and the service life of the sealing plates, the plate seats and the second sealing rings is effectively prolonged.

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Description

Technical Field

[0001] This invention relates to the field of valve technology, and more specifically to a bidirectional sealing valve device. Background Technology

[0002] In fluid transport and control systems, valves are key components for realizing medium flow control, flow regulation, and pressure control. They are widely used in many industrial and civil fields such as water supply and drainage, petrochemicals, power energy, metallurgy, and mining, playing an irreplaceable role in ensuring the safe and stable operation of fluid systems. While existing technologies offer a variety of valve structures, their basic components typically include a main load-bearing component and a functional control component. The main component is usually the valve body, serving as the channel for fluid flow and the mounting base for various components. The functional control component mainly encompasses the drive device, transmission mechanism, opening and closing elements, and sealing structure. The drive device can be manual, electric, or pneumatic, providing power for valve operation. The transmission mechanism often connects the drive device and the opening and closing elements through components such as the valve stem to transmit power. The opening and closing element is the core component that directly controls the flow path; common forms include slide plates, gates, ball valves, and butterfly valves, corresponding to different valve types such as slide valves, gate valves, ball valves, and butterfly valves. The sealing structure is located between the opening and closing element and the valve body or seat, achieving fluid sealing through the cooperation of the sealing element and the sealing surface, ensuring no leakage when the valve is closed.

[0003] However, the existing technology has the following problems:

[0004] In existing valves, the seals often move synchronously with the opening and closing parts. Throughout the movement of the opening and closing parts, they are constantly in contact with the sealing surface and valve seat surface. Small impurities entrained in the fluid will exacerbate this frictional loss, leading to wear and deformation of the seals. At the same time, valve seats are mostly rigid designs, which means that when the seals wear out after long-term use, gaps will appear between the seals and the sealing surface, affecting the overall sealing effect, shortening the overall service life of the valve, and increasing equipment maintenance costs and downtime frequency. Summary of the Invention

[0005] The purpose of this invention is to provide a bidirectional sealing valve device to solve the above-mentioned problems, and to overcome the defects of existing valve seals that are easily worn and deformed due to friction with the opening and closing parts throughout the process, thus affecting the sealing effect, as detailed below.

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

[0007] This invention provides a bidirectional sealing valve device, comprising: a valve body, wherein two plate seats are installed inside the valve body, and a sliding plate is slidably connected between the two plate seats; the plate seats and the sliding plate are respectively provided with flow holes of the same size; two first sealing rings are installed in the flow holes of the sliding plate, and a second sealing ring is installed in the flow holes of the plate seats; a sealing assembly is provided on the sliding plate, the sealing assembly including two sealing plates; a circular hole is provided on the sliding plate, and the two sealing plates are slidably connected in the circular hole of the sliding plate; the two sealing plates have chamfered edges on their adjacent sides; two wedges are horizontally slidably connected on the sliding plate; two protrusions are installed on the inner wall of the valve body, and the two protrusions are respectively located on the movement trajectory of the two wedges; during the contact between the two wedges and the two protrusions, the two wedges will move closer to each other; during the process of the two wedges moving closer to each other, the chamfers of the two sealing plates will cause the two sealing plates to abut against the two second sealing rings respectively; an anti-caking assembly is provided on the sliding plate to prevent caking in the flow holes of the sliding plate.

[0008] Preferably, a valve stem is connected to the top of the slide plate, a pressure cap is installed on the top of the valve body, the valve stem and the pressure cap are slidably connected through each other, and a driver is installed on the top of the valve body. The output end of the driver is connected to the valve stem, and the driver is used to drive the valve stem to move up and down.

[0009] Preferably, the second sealing ring protrudes from the plate seat surface on the side near the slide plate, the two first sealing rings abut against the two second sealing rings respectively, two disc springs are installed on the inner wall of the valve body, the disc springs abut against the pressure rings on the side near the plate seat, the two pressure rings abut against the two plate seats away from the slide plate respectively, and a set of first springs is connected between the side of the plate seat away from the slide plate and the valve body.

[0010] Preferably, the slide plate has two fixing rods installed inside, the two fixing rods are located between two sealing plates, and a set of second springs is respectively provided between the side of the two sealing plates near the fixing rods and the fixing rods.

[0011] Preferably, a sliding shaft is slidably connected through the center of the sealing plate, a smooth rod is connected between the two fixed rods, a turntable is rotatably connected to the outer wall of the smooth rod, two connecting rods are hinged on the turntable, the ends of the two connecting rods away from the turntable are respectively hinged to the two sliding shafts, a first gear is connected to the bottom of the turntable, and a first rack is connected to the side of the two sealing plates near the turntable. Both first racks mesh with the first gear. When the two first racks are far apart, they can drive the turntable to rotate counterclockwise through the first gear. When the turntable rotates counterclockwise, the two connecting rods respectively drive the two sliding shafts to slide away from the turntable on the two sealing plates. The ends of the sliding shafts away from the turntable are connected to multiple protruding rods.

[0012] Preferably, the anti-caking assembly includes a rotating ring, scraper strips, and a deflector shaft. The rotating ring is rotatably connected to the inside of the slide plate, and multiple scraper strips are connected to the inner side of the rotating ring. The deflector shaft is connected to the side wall of the rotating ring. A straight groove is formed on the plate base near the deflector shaft, and an arc-shaped groove is formed on the side of the slide plate near the straight groove. The deflector shaft is slidably connected to the arc-shaped groove, and the end of the deflector shaft away from the rotating ring is slidably connected to the straight groove. When the slide plate moves up and down, it drives the deflector shaft to slide horizontally in the straight groove. While sliding horizontally in the straight groove, the deflector shaft also slides along the arc-shaped groove, causing the deflector shaft to drive the rotating ring to rotate inside the slide plate.

[0013] Preferably, the two first sealing rings are rotatably connected to both sides of the rotating ring, and the plurality of scrapers are arranged in a circumferential array on the rotating ring. When the plurality of scrapers rotate, they scrape off the impurities attached to the inner side of the two first sealing rings.

[0014] Preferably, the slide plate is provided with a polishing assembly, which includes two polishing rollers. Both polishing rollers are rotatably installed inside the slide plate. Part of the outer wall of the polishing roller protrudes from the side wall of the slide plate. The two second sealing rings are respectively located on the movement trajectory of the two polishing rollers. During the movement, the two polishing rollers polish the side of the two second sealing rings that is close to the slide plate.

[0015] Preferably, one end of the grinding roller is connected to a second gear, and two second racks are connected to the protrusion near the second gear. The two second racks mesh with the two second gears respectively. When the slide moves up and down, the two second racks drive the two second gears to rotate, and when the two second gears rotate, they drive the two grinding rollers to rotate.

[0016] The beneficial effects are:

[0017] 1. This bidirectional sealing valve device, through the arrangement of the sealing components, ensures that when the flow channel is closed, the two sealing plates tightly abut against the two second sealing rings, achieving complete sealing of the flow holes of the two plate seats. The sealing plates only move outward and contact the second sealing rings when the sliding plate is about to be in place, avoiding continuous friction between the sealing plates and the second sealing rings and plate seats, significantly reducing the wear of the sealing plates, and effectively extending the service life of the sealing plates, plate seats, and second sealing rings. Through the setting of the sliding shaft, when the fluid in contact with the sealing plates forms an ice layer, the protruding rod and the end of the sliding shaft can apply shearing and extrusion forces from inside the ice layer at the same time as the flow channel is opened, breaking the ice layer into small pieces and promoting the rapid removal of ice fragments from the surface of the sealing plates.

[0018] 2. This bidirectional sealing valve device, through the setting of the anti-caking component, enables the rotating ring to rotate inside the slide plate when the rotating shaft moves up and down. When the rotating ring rotates, it drives multiple scrapers to rotate synchronously. When the multiple scrapers rotate, they continuously scrape off the impurities attached to the two first sealing rings through the scraping action, and also simultaneously carry away the impurities on the inner wall of the rotating ring. The impurities are suspended in the fluid and discharged with the fluid, thereby avoiding the deposition of impurities on the inner side of the two first sealing rings and the occurrence of agglomeration, ensuring the smooth flow of fluid.

[0019] 3. This bidirectional sealing valve device, through the setting of the grinding component, enables the two grinding rollers to effectively grind the two second sealing rings respectively as they move with the slide plate, promptly removing small scratches, burrs, and impurities from the surface of the second sealing rings and restoring the flatness of the sealing surface of the second sealing rings; through the cooperation of the second rack and the second gear, the grinding rollers can also rotate while moving, and the rotation direction of the grinding rollers is coordinated with the movement direction of the slide plate, so that the grinding material can cut into the scratches on the surface of the sealing ring more smoothly, increasing the contact area and enhancing the effect of impurity removal and scratch repair. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present 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 some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the valve body structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the plate base structure of the present invention;

[0024] Figure 4 This is a schematic diagram of the skateboard structure of the present invention;

[0025] Figure 5 This is a schematic diagram of the sealing assembly structure of the present invention;

[0026] Figure 6 This is a schematic diagram of the protrusion structure of the present invention;

[0027] Figure 7 This is a schematic diagram of the wedge block structure of the present invention;

[0028] Figure 8 This is a schematic diagram of the turntable structure of the present invention;

[0029] Figure 9 This is a schematic diagram of the first gear structure of the present invention;

[0030] Figure 10 This is a schematic diagram of the anti-caking component structure of the present invention;

[0031] Figure 11 This is a schematic diagram of the sliding shaft structure of the present invention;

[0032] Figure 12 This is a schematic diagram of the straight groove structure of the present invention;

[0033] Figure 13 This is a schematic diagram of the arc-shaped groove structure of the present invention;

[0034] Figure 14 This is a schematic diagram of the grinding component structure of the present invention.

[0035] The annotations in the attached figures are explained as follows:

[0036] 1. Valve body; 2. Actuator; 3. Valve stem; 4. Gland;

[0037] 5. Slide plate; 51. First sealing ring;

[0038] 6. Plate base; 61. Second sealing ring; 62. Disc spring; 63. Pressure ring; 64. First spring;

[0039] 7. Sealing assembly; 71. Sealing plate; 72. Fixing rod; 73. Second spring; 74. Wedge; 75. Protrusion; 76. Sliding shaft; 77. Protruding rod; 78. Polished rod; 79. Turntable; 710. Connecting rod; 711. First gear; 712. First rack;

[0040] 8. Anti-caking component; 81. Rotary ring; 82. Scraper; 83. Dial shaft; 84. Straight groove; 85. Arc groove;

[0041] 9. Grinding assembly; 91. Grinding roller; 92. Second gear; 93. Second rack. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0043] Example 1

[0044] In existing valves, the seals often move synchronously with the opening and closing parts. Throughout the movement of the opening and closing parts, they are constantly in contact with the sealing surface and the valve seat surface. Small impurities entrained in the fluid will exacerbate this frictional loss, leading to wear and deformation of the seals. At the same time, valve seats are mostly rigid designs, which means that when the seals wear after long-term use, gaps will appear between the seals and the sealing surface, affecting the overall sealing effect. This embodiment is invented to solve the above problems.

[0045] Please see Figure 1 - Figure 4 A bidirectional sealing valve device includes: a valve body 1, with two plate seats 6 installed inside the valve body 1, and a slide plate 5 slidably connected between the two plate seats 6. The plate seats 6 and slide plate 5 are each provided with flow holes of the same size. Two first sealing rings 51 are installed in the flow holes of the slide plate 5, and a second sealing ring 61 is installed in the flow holes of the plate seats 6. A valve stem 3 is connected to the top of the slide plate 5, and a pressure cap 4 is installed on the top of the valve body 1. The valve stem 3 and the pressure cap 4 are slidably connected through each other. An actuator 2 is installed on the top of the valve body 1, and the output end of the actuator 2 is connected to the valve stem 3. The actuator 2 is used to drive the valve stem 3 to move up and down. The slide plate 5 and the flow holes on the two plate seats 6 together constitute the core fluid channel of the valve. When the flow channel is opened, the actuator 2 is activated. The power is output to drive the valve stem 3 to slide upward along the through hole of the pressure plate 4. The valve stem 3 simultaneously pulls the slide plate 5 to move upward between the two plate seats 6 to the uppermost position inside the valve body 1. At this time, the flow hole of the slide plate 5 is completely aligned with the flow hole of the two plate seats 6, forming a smooth fluid passage. At the same time, the second sealing ring 61 on the two plate seats 6 is also precisely aligned with the two first sealing rings 51 in the flow hole of the slide plate 5. The two work together to initially achieve the basic sealing and adaptation of the flow channel. When the flow channel is closed, the actuator 2 drives the valve stem 3 to move downward in the opposite direction. The valve stem 3 drives the slide plate 5 to slide downward between the two plate seats 6 to the lowermost position, so that the flow hole of the slide plate 5 is completely misaligned with the flow hole of the two plate seats 6, cutting off the fluid flow path.

[0046] Furthermore, please refer to Figure 2 - Figure 6A sealing assembly 7 is provided on the slide plate 5. The sealing assembly 7 includes two sealing plates 71. The slide plate 5 has a circular hole, and the two sealing plates 71 are slidably connected in the circular hole of the slide plate 5. The edges of the two sealing plates 71 near each other are chamfered. Two wedges 74 are horizontally slidably connected on the slide plate 5. Two protrusions 75 are installed on the inner wall of the valve body 1. The two protrusions 75 are respectively located on the movement trajectory of the two wedges 74. During the contact between the two wedges 74 and the two protrusions 75, they will move closer to each other. During the process of the two wedges 74 moving closer to each other, the chamfers of the two sealing plates 71 will drive the two sealing plates 71 to move closer to each other. The two second sealing rings 61 are pressed against each other; the wedge 74 is generally wedge-shaped, with an inclined surface on the side facing the protrusion 75, and a pointed end near the sealing plate 71. When the slide plate 5 moves down to close the flow channel, the slide plate 5 simultaneously drives the two wedges 74 to move downward. The inclined surfaces of the two wedges 74 will contact the two protrusions 75 on the inner wall of the valve body 1 respectively. Since the position of the protrusions 75 is fixed, they will apply a lateral counter-force to the wedges 74 along the inclined surfaces of the wedges 74, forcing the two wedges 74 to slide in the slide plate 5 towards the two sealing plates 71. During this process, the pointed ends of the two wedges 74 will respectively The chamfered areas of the two sealing plates 71 are embedded in the plate. Through the guiding effect of the chamfer, the horizontal thrust of the wedge 74 is converted into a force that drives the sealing plates 71 to slide outward along the circular hole of the slide plate 5. This causes the two sealing plates 71 to move away from each other. As the slide plate 5 continues to move downward, the two sealing plates 71 gradually move to positions corresponding to the second sealing rings 61 of the two plate seats 6. When the slide plate 5 moves into position, the two sealing plates 71 are tightly abutting against the two second sealing rings 61. The outer diameter of the sealing plate 71 is larger than the outer diameter of the second sealing ring 61, and it can completely cover the second sealing ring 61. The sealing plate 71 and the second sealing ring 61 are closely abutting against the second sealing ring 61. The contact area of the second sealing ring 61 is made of elastic material, while the body of the second sealing ring 61 is made of rigid material. This combination of soft contact and hard support forms a sealing method that combines hard and soft sealing, which can completely block fluid leakage and achieve complete sealing of the flow holes of the two plate seats 6. At the same time, the sealing plate 71 only moves outward and contacts the second sealing ring 61 when the slide plate 5 is about to be in place, avoiding continuous friction between the sealing plate 71, the second sealing ring 61, and the plate seat 6 during the entire downward movement of the slide plate 5. This significantly reduces the wear of the sealing plate 71 and effectively extends the service life of the sealing plate 71, the plate seat 6, and the second sealing ring 61.

[0047] In addition, please see Figure 3 , Figure 4The second sealing ring 61 protrudes from the surface of the plate seat 6 on the side near the slide plate 5. The two first sealing rings 51 abut against the two second sealing rings 61 respectively. Two disc springs 62 are installed on the inner wall of the valve body 1. The side of the disc spring 62 near the plate seat 6 abuts against the pressure ring 63. The two pressure rings 63 abut against the sides of the two plate seats 6 away from the slide plate 5 respectively. A set of first springs 64 is connected between the side of the plate seat 6 away from the slide plate 5 and the valve body 1. The disc spring 62 has excellent elastic restoring performance and load bearing capacity. It is always in a pre-compressed state and applies a continuous and stable elastic force to the pressure ring 63 it abuts against. The pressure ring 63 then transmits this elastic force to the plate seat 6, so that the plate seat 6 maintains a pre-tight force in the direction of approaching the slide plate 5 in the valve body 1. At the same time, the pressure ring 63 and the valve body 1 maintain a pre-tight force. The first spring 64 further assists in providing elastic support. The plate seat 6 has a certain amount of axial movement within the valve body 1. Since the second sealing ring 61 protrudes from the surface of the plate seat 6, under the combined action of the disc spring 62 and the first spring 64, the plate seat 6 can drive the second sealing ring 61 to always tightly press against the outer wall of the slide plate 5, the first sealing ring 51, and the sealing plate 71 that subsequently contacts it. This elastic pre-tightening structure gives the second sealing ring 61 a certain buffer margin, avoiding severe friction caused by rigid collisions or hard contacts between parts, reducing wear and tear. At the same time, when the second sealing ring 61 wears out after long-term use, the elastic force of the disc spring 62 and the first spring 64 can push the plate seat 6 to move slightly, realizing automatic compensation of the sealing gap and ensuring long-term sealing effect.

[0048] In addition, please see Figure 7 , Figure 8 The slide plate 5 has two fixing rods 72 installed inside, located between two sealing plates 71. A set of second springs 73 is installed between each of the sealing plates 71 and the fixing rods 72. The fixing rods 72 provide fixed support points for the second springs 73. The two sets of second springs 73 apply a pulling force to the two sealing plates 71 towards the fixing rods 72. When the slide plate 5 moves upward, the two wedges 74 on the slide plate 5 also move upward, gradually disengaging from the protrusions 75 on the inner wall of the valve body 1. Upon contact, the pushing force of the wedge block 74 on the sealing plate 71 disappears. Subsequently, the two sets of second springs 73 pull the two sealing plates 71 to slide along the circular hole of the slide plate 5 towards the fixing rod 72 until the sealing plate 71 tightly abuts against the fixing rod 72, realizing the rapid reset of the sealing plate 71. This reset process causes the sealing plate 71 to disengage from the second sealing ring 61, avoiding friction between the sealing plate 71 and the second sealing ring 61 and the plate seat 6 during the upward movement of the slide plate 5, further protecting the seal and the plate seat 6, and extending the service life of the overall device.

[0049] It is worth noting that, please refer to Figure 7 - Figure 9A sliding shaft 76 is slidably connected through the center of the sealing plate 71. A smooth rod 78 is connected between the two fixed rods 72. A turntable 79 is rotatably connected to the outer wall of the smooth rod 78. Two connecting rods 710 are hinged to the turntable 79. The ends of the two connecting rods 710 away from the turntable 79 are respectively hinged to the two sliding shafts 76. A first gear 711 is connected to the bottom of the turntable 79. A first rack 712 is connected to the side of the two sealing plates 71 near the turntable 79. Both first racks 712 mesh with the first gear 711. When the two first racks 712 move away from each other, they can drive the turntable 79 to rotate counterclockwise through the first gear 711. When the turntable 79 rotates counterclockwise, it drives the two sliding shafts 76 to move away from the two sealing plates 71 through the two connecting rods 710. The sliding shaft 76 slides away from the turntable 79, and multiple protruding rods 77 are connected to the end of the sliding shaft 76 away from the turntable 79. When the two sealing plates 71 move away from each other under the push of the wedge block 74, the two sealing plates 71 synchronously drive the two first racks 712 to move to both sides. Since both first racks 712 are meshed with the first gear 711, the lateral movement of the two first racks 712 is converted into the rotational motion of the first gear 711, which in turn drives the turntable 79 connected to the first gear 711 to rotate counterclockwise along the smooth rod 78. When the turntable 79 rotates, the two connecting rods 710 hinged to its edge swing accordingly. The end of the connecting rod 710 away from the turntable 79 pushes the sliding shaft 76 to slide away from the center of the sealing plate 71 in a direction away from the turntable 79, so that the sliding shaft 76... Multiple protruding rods 77 at the ends of the valve gradually extend out of the sealing plate 71 toward the surface of the second sealing ring 61. The connection between the sliding shaft 76 and the sealing plate 71 is sealed, ensuring that the sliding shaft 76 can extend and retract on the sealing plate 71, and also ensuring that the fluid does not pass through the connection between the sliding shaft 76 and the sealing plate 71, thus ensuring the sealing effect. In low-temperature environments, if the flow channel is closed for a long time, the surface of the sealing plate 71 in contact with the fluid is prone to condensation and ice layer. When the valve is opened, the two sealing plates 71 move closer to each other under the pull of the second spring 73. At this time, the two first racks 712 move closer to each other, thereby driving the first gear 711 and the turntable 79 to rotate clockwise. The turntable 79 pulls the sliding shaft 76 and the protruding rods 77 closer together through the connecting rod 710. As the disc 79 retracts, the extended protruding rod 77 and the end of the sliding shaft 76 are pre-embedded in the ice layer on the surface of the sealing plate 71. With the retraction of the sliding shaft 76, the ends of the protruding rod 77 and the sliding shaft 76 can apply shearing and compressive forces from inside the ice layer, breaking the ice layer into small pieces. This promotes the rapid removal of ice fragments from the surface of the sealing plate 71, effectively preventing the ice layer from getting stuck in the gap between the sliding plate 5 and the plate seat 6 when the sealing plate 71 is reset. This prevents the sliding plate 5 from being obstructed due to ice layer jamming, or from scratching and abrading the surface of the plate seat 6 and the sliding plate 5 caused by the ice layer. This ensures the normal opening and closing of the valve in low-temperature environments. If the liquid inside the flow channel is completely frozen, the valve and flow channel need to be thawed before attempting operation to avoid damage to the components.

[0050] Example 2

[0051] Based on the above embodiment, when the flow channel is half open, that is, when the slide plate 5 moves down a certain distance and its flow hole is partially misaligned with the flow holes of the two plate seats 6, a portion of the flow hole portion of the slide plate 5 will appear in a recessed area. Impurities in the flow channel are easily deposited in this recessed area. If the flow channel is closed directly afterward, impurities will continue to be deposited in the flow holes of the slide plate 5. After a long period of sedimentation, some impurities will be deposited on the inner side of the two first sealing rings 51 and agglomerate. The agglomerated impurities are not easy to fall off after the flow channel is opened, which affects the smoothness of fluid flow. This embodiment is invented to solve the above problems.

[0052] Please see Figure 4 , Figure 10 - Figure 13 The slide plate 5 is equipped with an anti-caking component 8 to prevent agglomeration inside the flow holes of the slide plate 5. The anti-caking component 8 includes a rotating ring 81, scraper strips 82, and a deflector shaft 83. The rotating ring 81 is rotatably connected to the inside of the slide plate 5. Multiple scraper strips 82 are connected to the inner side of the rotating ring 81. The deflector shaft 83 is connected to the side wall of the rotating ring 81. A straight groove 84 is formed on the plate base 6 near the deflector shaft 83. An arc-shaped groove 85 is formed on the side of the slide plate 5 near the straight groove 84. The deflector shaft 83 is slidably connected to the arc-shaped groove 85. The end of the deflector shaft 83 away from the rotating ring 81 is connected to the straight groove. 84 Sliding connection, when the slide plate 5 moves up and down, it drives the pivot shaft 83 to slide horizontally in the straight groove 84. While sliding horizontally in the straight groove 84, the pivot shaft 83 slides along the arc groove 85, causing the pivot shaft 83 to drive the rotating ring 81 to rotate in the slide plate 5. The two first sealing rings 51 are rotatably connected to both sides of the rotating ring 81 respectively. Multiple scraper strips 82 are distributed in a circumferential array on the rotating ring 81. When the multiple scraper strips 82 rotate, they scrape off the impurities attached to the inner side of the two first sealing rings 51. When the slide plate 5 moves up and down, the rotating ring 81 moves vertically in sync with the slide plate 5. During the vertical displacement, the vertical limiting effect of the straight groove 84 prevents the shift shaft 83 from moving up and down with the rotating ring 81, maintaining only a fixed height. The other end of the shift shaft 83 passes through the arc-shaped groove 85 of the slide plate 5. The vertical movement of the slide plate 5 forces the shift shaft 83 to slide along the arc surface of the arc-shaped groove 85. At the same time, the shift shaft 83 slides horizontally along the straight groove 84. Through the dual guiding effect of the arc-shaped groove 85 and the straight groove 84, the shift shaft 83 can drive the rotating ring 81 to rotate within the slide plate 5 when the rotating ring 81 moves up and down. The first sealing ring 51 is rotatably connected to both sides of the rotating ring 81. The two first sealing rings 51 and the rotating ring 81 together form a complete ring structure. When the rotating ring 81 rotates, the scraper strips 82 in its inner circumferential array will rotate synchronously. The scraper strips 82 peel off the impurities attached to the two first sealing rings 51 through continuous scraping action, and also simultaneously carry away the impurities on the inner wall of the rotating ring 81. The impurities are suspended in the fluid and discharged with the fluid, thereby avoiding the deposition of impurities on the inner side of the two first sealing rings 51 and the occurrence of agglomeration, and ensuring the smooth flow of fluid.

[0053] Example 3

[0054] Based on the above embodiment, the second sealing ring 61 is in long-term contact and friction with the outer wall of the slide plate 5, the first sealing ring 51 and the sealing plate 71, and the fine hard impurities carried in the fluid will cause scratches on its surface during relative movement. At the same time, there is also the situation where hard impurities adhere to the second sealing ring 61, resulting in fine scratches, burrs and impurities on the sealing surface of the second sealing ring 61, which reduces the flatness of the sealing surface of the second sealing ring 61 and thus affects the sealing effect. This embodiment is invented to solve the above problems.

[0055] Please see Figure 3 , Figure 10 , Figure 11 , Figure 14 A grinding assembly 9 is provided on the slide plate 5. The grinding assembly 9 includes two grinding rollers 91, both of which are rotatably mounted inside the slide plate 5. Part of the outer wall of the grinding rollers 91 protrudes from the side wall of the slide plate 5. Two second sealing rings 61 are respectively located on the movement trajectory of the two grinding rollers 91. During the movement, the two grinding rollers 91 grind the side of the two second sealing rings 61 closest to the slide plate 5. When the slide plate 5 moves up and down under the drive of the driver 2, the grinding rollers 91 move synchronously with the slide plate 5, and the protruding outer wall of the grinding rollers 91 interacts with the second sealing rings 61. The surface of the second sealing ring 61 is in contact with the side of the slide plate 5. At the same time, the disc spring 62 and the first spring 64 inside the valve body 1 continuously push the plate seat 6 towards the slide plate 5, so that the second sealing ring 61 always maintains a slight pressure on the grinding roller 91. This ensures that the grinding roller 91 can effectively grind the second sealing ring 61, remove the small scratches, burrs and impurities on the surface of the second sealing ring 61 in time, restore the flatness of the sealing surface of the second sealing ring 61, and, together with the elastic compensation provided by the disc spring 62 and the first spring 64, ensure that the second sealing ring 61 maintains good sealing performance for a long time.

[0056] It is worth noting that, please refer to Figure 14 One end of the grinding roller 91 is connected to a second gear 92. Two second racks 93 are connected to the protrusion 75 near the second gear 92. The two second racks 93 mesh with the two second gears 92 respectively. When the slide plate 5 moves up and down, the two second racks 93 drive the two second gears 92 to rotate, and the rotation of the two second gears 92 drives the two grinding rollers 91 to rotate. Figure 14As shown, taking the right-side grinding roller 91 as an example, the second rack 93 on the protrusion 75 is a fixed straight rack, and its tooth surface is engaged with the second gear 92 at one end of the right-side grinding roller 91. When the slide plate 5 moves down, the second gear 92, which moves synchronously with the slide plate 5, slides relative to the fixed second rack 93, causing the second gear 92 to rotate clockwise, which in turn drives the right-side grinding roller 91 to rotate clockwise synchronously. At this time, the grinding roller 91 moves down with the slide plate 5 and rotates clockwise itself, forming a composite motion of translation and rotation. The rotation causes the grinding roller to rotate. The contact area between the roller 91 and the second sealing ring 61 is constantly updated to avoid excessive friction in a single area and increase the contact area. Furthermore, the rotation direction of the grinding roller 91 and the downward movement direction of the slide plate 5 work in synergy, allowing the grinding material to cut into the scratches on the surface of the sealing ring more smoothly, enhancing the removal of impurities and the repair of scratches. Similarly, when the slide plate 5 moves upward, the second gear 92 rotates in the opposite direction under the action of the second rack 93, driving the grinding roller 91 to rotate in the opposite direction. This also achieves efficient grinding through compound motion, ensuring that the surface of the second sealing ring 61 always remains flat and smooth.

[0057] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A bidirectional sealing valve device, characterized in that, include: Valve body (1), two plate seats (6) are installed inside the valve body (1), and a sliding plate (5) is slidably connected between the two plate seats (6). The plate seats (6) and the sliding plate (5) are respectively provided with flow holes of the same size. Two first sealing rings (51) are installed in the flow holes of the sliding plate (5), and a second sealing ring (61) is installed in the flow holes of the plate seats (6). A sealing assembly (7) is provided on the slide plate (5). The sealing assembly (7) includes two sealing plates (71). A round hole is provided on the slide plate (5). The two sealing plates (71) are slidably connected in the round hole of the slide plate (5). The two sealing plates (71) have chamfers on their respective edges. Two wedges (74) are horizontally slidably connected on the slide plate (5). Two protrusions (75) are installed on the inner wall of the valve body (1). The two protrusions (75) are respectively located on the movement trajectory of the two wedges (74). The two wedges (74) will approach each other during the contact process with the two protrusions (75). During the process of the two wedges (74) approaching each other, the chamfers of the two sealing plates (71) will drive the two sealing plates (71) to abut against the two second sealing rings (61) respectively. The slide plate (5) is provided with an anti-caking component (8) to prevent caking inside the flow holes of the slide plate (5); The top of the slide plate (5) is connected to a valve stem (3), the top of the valve body (1) is fitted with a pressure cap (4), the valve stem (3) and the pressure cap (4) are slidably connected through each other, the top of the valve body (1) is fitted with a driver (2), the output end of the driver (2) is connected to the valve stem (3), and the driver (2) is used to drive the valve stem (3) to move up and down; The anti-caking assembly (8) includes a rotating ring (81), scraper strips (82), and a pivot shaft (83). The rotating ring (81) is rotatably connected to the inside of the slide plate (5). Multiple scraper strips (82) are connected to the inner side of the rotating ring (81). The pivot shaft (83) is connected to the side wall of the rotating ring (81). A straight groove (84) is provided on the plate base (6) near the pivot shaft (83). An arc-shaped groove is provided on the side of the slide plate (5) near the straight groove (84). 85), the dial shaft (83) is slidably connected to the arc groove (85), and the end of the dial shaft (83) away from the rotating ring (81) is slidably connected to the straight groove (84). When the slide plate (5) moves up and down, it drives the dial shaft (83) to slide horizontally in the straight groove (84). While the dial shaft (83) slides horizontally in the straight groove (84), it slides along the arc groove (85), so that the dial shaft (83) drives the rotating ring (81) to rotate in the slide plate (5).

2. The valve device with bidirectional sealing according to claim 1, characterized in that: The second sealing ring (61) protrudes from the surface of the plate seat (6) on the side near the slide plate (5). The two first sealing rings (51) abut against the two second sealing rings (61) respectively. Two disc springs (62) are installed on the inner wall of the valve body (1). The disc springs (62) abut against the pressure rings (63) on the side near the plate seat (6). The two pressure rings (63) abut against the sides of the two plate seats (6) away from the slide plate (5) respectively. A set of first springs (64) is connected between the side of the plate seat (6) away from the slide plate (5) and the valve body (1).

3. The valve device with bidirectional sealing according to claim 2, characterized in that: The slide plate (5) has two fixing rods (72) installed inside. The two fixing rods (72) are located between two sealing plates (71). A set of second springs (73) is respectively provided between the side of the two sealing plates (71) near the fixing rods (72) and the fixing rods (72).

4. The bidirectional sealing valve device according to claim 3, characterized in that: A sliding shaft (76) is slidably connected through the center of the sealing plate (71). A smooth rod (78) is connected between the two fixed rods (72). A turntable (79) is rotatably connected to the outer wall of the smooth rod (78). Two connecting rods (710) are hinged on the turntable (79). The ends of the two connecting rods (710) away from the turntable (79) are respectively hinged to the two sliding shafts (76). A first gear (711) is connected to the bottom of the turntable (79). The two sealing plates (71) are respectively located on the side of the turntable (79). A first rack (712) is connected, and both first racks (712) mesh with a first gear (711). When the two first racks (712) are far apart from each other, they can drive the turntable (79) to rotate counterclockwise through the first gear (711). When the turntable (79) rotates counterclockwise, it drives two sliding shafts (76) to slide on two sealing plates (71) away from the turntable (79) through two connecting rods (710). The end of the sliding shaft (76) away from the turntable (79) is connected to a plurality of protruding rods (77).

5. A bidirectional sealing valve device according to claim 1, characterized in that: The two first sealing rings (51) are rotatably connected to the two sides of the rotating ring (81), and the multiple scrapers (82) are arranged in a circumferential array on the rotating ring (81). When the multiple scrapers (82) rotate, they scrape off the impurities attached to the inner side of the two first sealing rings (51).

6. A bidirectional sealing valve device according to claim 2, characterized in that: The slide plate (5) is provided with a grinding assembly (9), which includes two grinding rollers (91). Both grinding rollers (91) are rotatably installed inside the slide plate (5). Part of the outer wall of the grinding roller (91) protrudes from the side wall of the slide plate (5). The two second sealing rings (61) are respectively located on the movement trajectory of the two grinding rollers (91). During the movement, the two grinding rollers (91) grind the side of the two second sealing rings (61) close to the slide plate (5).

7. A bidirectional sealing valve device according to claim 6, characterized in that: One end of the grinding roller (91) is connected to a second gear (92). Two second racks (93) are connected to the protrusion (75) near the second gear (92). The two second racks (93) mesh with the two second gears (92) respectively. When the slide plate (5) moves up and down, the two second racks (93) drive the two second gears (92) to rotate. When the two second gears (92) rotate, they drive the two grinding rollers (91) to rotate.