Encrypted soft seal gate valve

Abstract

The application relates to the technical field of valves, and particularly discloses an encrypted soft-sealed gate valve which comprises pipeline sections, a gate shell, gate plates and a valve rod; the pipeline sections are provided in two, the two pipeline sections are integrally formed on the two end faces of the bottom of the gate shell, the gate plates are arranged in the gate shell and used for vertical lifting of the gate plates; the valve rod is rotationally connected to the top of the gate shell, and the bottom end of the valve rod is threadedly connected to the top of the gate plate; the gate plates are provided in two, the two gate plates are connected through connecting portions, the side faces of the two gate plates away from each other are provided with annular grooves, and the annular grooves are slidably provided with sealing rings; the end faces of the two pipeline sections close to each other are provided with annular sealing grooves, and the end faces of the sealing rings are pressed against the bottom faces of the annular sealing grooves; the driving mechanism for driving the two sealing rings to slide is arranged between the two gate plates, and the side faces of the gate plates slide in the inner wall of the gate shell and the end faces of the pipeline sections. The application has the effect of improving the sealing performance of the gate valve.

Description

Technical Field

[0001] This invention relates to the field of valve technology, and in particular to an encrypted soft-seal gate valve. Background Technology

[0002] A soft-seal gate valve is a fluid control valve that uses non-metallic elastic materials (such as rubber) as the core sealing component.

[0003] A soft-seal gate valve mainly consists of a valve body, a gate, and a valve stem. The valve body has a valve cavity for the gate to move up and down. The valve stem is rotatably and sealingly connected to the valve cover of the valve body. The portion of the valve stem located within the valve cavity passes through the gate, and the gate and valve stem are threaded together. The valve stem drives the gate to move up and down. The gate is wedge-shaped, with a first sealing ring installed on both sides. A second sealing ring is installed on the end face of the pipeline section of the valve body. The end faces of the pipeline sections at both ends of the valve body are flush with the two sides of the gate. As the gate descends, it causes the first sealing ring to descend as well. The first sealing ring gradually approaches the second sealing ring on the pipeline section, and the first and second sealing rings are pressed together by oblique pressure to achieve a seal, thus blocking the flow in the pipeline.

[0004] Because the gate and the pipeline are pressed together by the oblique pressure of the sealing ring, there is friction between the first and second sealing rings during each pressing process. After long-term use, the sealing surface will wear down. In addition, the residue of dirt between the sealing surfaces can easily cause internal leakage of the gate, resulting in a decrease in the sealing performance of the gate valve. Summary of the Invention

[0005] To address the problem of decreased sealing performance of gate valves, this application provides an encrypted soft-seal gate valve.

[0006] The encrypted soft-seal gate valve provided in this application adopts the following technical solution: An encrypted soft-seal gate valve includes pipe sections, a gate housing, gate plates, and a valve stem. Two pipe sections are integrally formed on both ends of the bottom of the gate housing. The gate plates are disposed within the gate housing, which is used for vertical lifting and lowering of the gate plates. The valve stem is rotatably connected to the top of the gate housing, and its bottom end is threadedly connected to the top of the gate plates. Two gate plates are connected by a connecting part. Each gate plate has an annular groove on its far-away sides, within which a sealing ring slides. An annular sealing groove is provided on the close-away end faces of the two pipe sections, with the sealing ring end faces pressed against the bottom surface of the annular sealing groove. A driving mechanism is installed between the two gate plates to drive the two sealing rings to slide, with the gate plate sides sliding against the inner wall of the gate housing and the end faces of the pipe sections.

[0007] Optionally, the gate is provided with an annular oil passage, which is connected to an annular groove. An annular piston is provided in the annular oil passage. A slip ring is connected to the side of the annular piston near the annular groove. An annular mounting groove for installing a sealing ring is provided on the end face of the slip ring away from the annular piston. The end of the slip ring away from the annular piston extends out of the annular groove. An annular limiting groove for the end of the pipe section is provided on the end face of the pipe section for the slip ring end to enter. The drive mechanism is used to inject hydraulic oil into both sides of the annular piston in the annular oil passage.

[0008] Optionally, the drive mechanism includes hydraulic cylinders and a drive assembly. Two hydraulic cylinders are provided, each injecting hydraulic oil into one of the two annular oil passages. The drive assembly is mounted on the bottom of the valve stem, and the two hydraulic cylinders are mounted between two gates, located on opposite sides of the drive assembly. Each hydraulic cylinder contains a piston head. A first piston rod is connected to the end of the piston head near the drive assembly, extending beyond the cylinder's end face. A second piston rod is connected to the other end of the piston head, extending beyond the other end of the cylinder. The diameter of the first piston rod is smaller than the diameter of the second piston rod. A first oil pipe connects to the circumferential surface of the cylinder near the drive assembly, with its end connected to the end of the annular oil passage near the connecting portion. A second oil pipe connects to the circumferential surface of the cylinder away from the drive assembly. A connecting channel is provided on the circumferential surface of the annular oil passage near the annular groove, and the second oil pipe connects to this connecting channel. The drive assembly is used to drive the two first piston rods.

[0009] Optionally, the drive assembly includes an upper push block, a sliding block, a lower push block, and a U-shaped connecting frame. The upper push block is located at the bottom of the valve stem, and its diameter is the same as that of the valve stem. The bottom of the upper push block has two inclined surfaces, each facing the first piston rod. A connecting plate is connected to the bottom surface of the upper push block. Two lower push blocks are provided, each connected to one of the two sides of the bottom of the connecting plate. The top surface of the lower push block is inclined, and the inclined surfaces of the two lower push blocks are parallel to the two inclined surfaces of the upper push block. The diameter of the lower push block is larger than that of the upper push block. Two sliding blocks are provided, sliding between the inclined surfaces of the upper and lower push blocks. Two U-shaped connecting frames are provided, with their ends connected to the two sides of the two sliding blocks. The lower push block is located inside the U-shaped connecting frames, and two second piston rods are connected to the middle of the two U-shaped connecting frames. A drive component for driving the upper push block to rise and fall is installed inside the valve stem.

[0010] Optionally, a rotating seat is installed at the top of the valve stem, and the rotating seat is rotatably connected to the top of the gate housing. The driving component includes an internally threaded tube and a screw. The internally threaded tube passes through the valve stem, and the top end of the internally threaded tube is rotatably connected to the rotating seat. The screw passes through the internal screw and is threadedly connected. The bottom end of the screw is rotatably connected to the top surface of the upper push block.

[0011] Optionally, a protective shell is installed on the outer circumference of the two gates, which encloses the space between the two gates; a threaded seat is installed on the top surface of the protective shell, and the valve stem passes through the threaded seat, which is threadedly connected to the valve stem and passes through the protective shell.

[0012] Optionally, a rotating mechanism for driving the screw rotation is installed on the top of the rotating seat; the rotating mechanism includes a turntable, a rotating rod, a rotating plate, a rotating shaft, a first spring, a hexagonal prism, and a positioning component; a driving plate is connected to the top of the screw, the driving plate rotates within the rotating seat, a sliding cavity for the driving plate to rise and fall is provided on the top surface of the rotating seat, the bottom of the rotating shaft rotates within the top of the sliding cavity, and the bottom surface of the rotating shaft is in contact with the top surface of the driving plate; a receiving cavity is provided inside the rotating shaft, the hexagonal prism is located within the receiving cavity, a sliding plate is connected to the top surface of the hexagonal prism, the sliding plate slides against the inner wall of the receiving cavity, the bottom end of the hexagonal prism extends out of the bottom surface of the rotating shaft, and a first rotating groove for the hexagonal prism to be inserted is provided on the top surface of the driving plate; a first spring is located within the receiving cavity, one end of the first spring is pressed against the top surface of the sliding plate, and the other end of the first spring is pressed against the top surface of the receiving cavity; the rotating plate is connected to the top of the rotating shaft, the bottom end of the rotating rod is rotatably connected to the rotating plate, and the turntable is connected to the top of the rotating rod; a positioning component is installed on the circumference of the rotating rod and is used to connect to the rotating plate.

[0013] Optionally, the rotating rod is a hexagonal prism; the positioning component includes a rotating plate and positioning rods, the rotating plate is sleeved on the rotating rod, and four positioning rods are provided. The top ends of the four positioning rods are connected to the circumference of the rotating plate, and the four positioning rods are evenly distributed around the circumference of the rotating plate. The inner side of the bottom end of the positioning rod is connected to an insertion block; four positioning blocks are connected to the circumference of the rotating plate, and the positioning blocks are evenly distributed around the circumference of the rotating plate. The top surface of the positioning blocks is provided with a first positioning groove for the insertion block to be inserted.

[0014] Optionally, the rotating shaft is fitted with a rotating tube, and the inner wall of the top of the rotating tube is rotatably connected to the top circumference of the rotating shaft; the top of the rotating seat is hexagonal, and the inner wall of the bottom end of the rotating tube is provided with a second rotating groove for the hexagonal block to be inserted; the top surface of the rotating tube is provided with four second positioning grooves for the insertion of four plug-in blocks, and the four second positioning grooves are evenly distributed around the circumference of the rotating tube.

[0015] Optionally, the drive plate has two symmetrically arranged through holes, each containing a limit rod. The end faces of the limit rods are connected to arc-shaped plates, which slide at the bottom of the through holes and extend into the first rotating groove. A wedge-shaped block is connected to the top surface of the arc-shaped plate away from the limit rods. Six clearance grooves are evenly distributed along the circumference of the drive plate, allowing the arc-shaped plate to enter. The bottom of each clearance groove has a wedge-shaped groove for the wedge-shaped block to slide into. A baffle is connected to the inner wall of the top of the through hole. A second spring is positioned above the arc-shaped plate, with one end pressing against the limit rod and the other end pressing against the baffle. An annular groove for the limit rods to rotate is provided on the inner wall of the sliding cavity.

[0016] In summary, this application includes at least one of the following beneficial technical effects: 1. When sealing the gate valve is required, the valve stem is rotated, causing the gate valve to descend. The gate valve moves downward from the top of the gate housing, gradually covering the pipe section until it is aligned with the pipe section and the sealing ring is aligned with the annular sealing groove. The drive assembly then drives the two sealing rings to gradually extend out of the annular groove and enter it. The sealing rings are pressed against the bottom of the annular sealing groove, filling it completely and achieving a seal between the gate valve and the pipe section, thus cutting off the fluid being transported by the pipeline. Sealing is achieved through positive pressure of the sealing rings, avoiding friction and reducing wear. Furthermore, the annular sealing groove accommodates the sealing rings, preventing them from being washed away and contaminated by the fluid, reducing residue on the sealing surface, thereby extending the service life of the sealing rings and improving the sealing performance of the gate valve. 2. When the sealing ring needs to extend out of the annular groove, the drive mechanism injects hydraulic oil into the annular oil passage on the side of the annular piston away from the slip ring. The hydraulic oil pushes the annular piston, which drives the slip ring. The slip ring drives the sealing ring to extend out of the annular groove, and the end of the slip ring is inserted into the annular limiting groove to limit the slip ring and improve the stability of the gate. 3. When it is necessary to drive the screw to rotate, align the rotating shaft of the rotating mechanism with the sliding cavity, so that the hexagonal prism is inserted into the first rotating groove. Continue to press down the turntable, so that the hexagonal prism contacts the bottom of the first positioning groove and presses the first spring. Rotate the rotating tube so that the hexagonal block of the rotating seat is inserted into the second rotating groove. First, insert the docking block into the first positioning groove and drive the turntable to rotate. The turntable drives the rotating plate to rotate through the rotating rod. The rotating plate drives the rotating plate to rotate through the plug block and the positioning block. The rotating plate drives the hexagonal prism to rotate through the rotating shaft. The hexagonal prism drives the screw to rotate through the driving plate. During the screw's lifting and lowering process, the hexagonal prism is always pressed against the bottom surface of the first rotating groove through the first spring. 4. When it is necessary to drive the valve stem to rotate, lift the rotating plate upwards. The rotating plate drives the plug block to disengage from the first positioning groove, drives the rotating rod to rotate, and the rotating rod drives the rotating plate to rotate, so that the plug block is aligned with the second positioning groove. Lower the rotating plate so that the plug block is inserted into the second positioning groove. Drive the turntable to rotate. The turntable drives the rotating plate to rotate through the rotating rod. The rotating plate rotates through the plug block and the rotating tube. The rotating tube drives the rotating seat to rotate through the hexagonal block. The rotating seat drives the valve stem to rotate. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the soft-seal gate valve according to an embodiment of this application; Figure 2 This is a cross-sectional structural diagram of the gate housing according to an embodiment of this application; Figure 3 This is a cross-sectional structural diagram of the protective shell according to an embodiment of this application; Figure 4This is a cross-sectional structural diagram of the gate according to an embodiment of this application; Figure 5 yes Figure 4 Enlarged structural diagram of part A in the middle; Figure 6 This is a partial cross-sectional structural diagram of the gate in an embodiment of this application; Figure 7 yes Figure 6 A magnified structural diagram of part B in the middle section; Figure 8 This is a schematic diagram of the structure of the driving component in an embodiment of this application; Figure 9 yes Figure 8 A magnified structural diagram of section C; Figure 10 This is a cross-sectional structural diagram of the valve stem according to an embodiment of this application; Figure 11 This is a cross-sectional structural diagram of the driver board according to an embodiment of this application; Figure 12 This is a schematic diagram of the rotating mechanism according to an embodiment of this application; Figure 13 This is a cross-sectional structural schematic diagram of the rotating mechanism according to an embodiment of this application; Figure 14 yes Figure 13 A magnified structural diagram of part D in the middle.

[0018] Explanation of reference numerals in the attached figures: 1. Pipeline section; 11. Gate shell; 111. Protective shell; 112. Threaded seat; 113. Guide plate; 12. Annular sealing groove; 13. Annular limiting groove; 2. Gate plate; 21. Connecting part; 22. Annular groove; 23. Sealing ring; 24. Annular oil passage; 25. Annular piston; 26. Slip ring; 261. Annular mounting groove; 3. Valve stem; 31. Rotating seat; 311. Sliding cavity; 312. Hexagonal block; 313. Annular sliding groove; 4. Drive mechanism; 41. Oil cylinder; 411. Piston head; 412. First piston rod; 413. Second piston rod; 414. First oil pipe; 415. Second oil pipe; 416. Connecting channel; 42. Drive assembly; 421. Upper push block; 4211. Connecting plate; 422. Sliding block; 423. Lower push block 424. Moving block; 5. U-shaped connecting frame; 6. Driving component; 51. Internally threaded tube; 52. Screw; 521. Driving plate; 5211. First rotating groove; 5212. Through hole; 522. Limiting rod; 523. Arc plate; 524. Wedge block; 525. Baffle; 526. Second spring; 6. Rotating mechanism; 61. Turntable; 62. Rotating rod; 63. Rotating plate; 631. Positioning block; 6311. First positioning groove; 64. Rotating shaft; 641. Receiving cavity; 65. First spring; 66. Hexagonal prism; 661. Slide plate; 662. Leaving groove; 663. Wedge groove; 67. Positioning component; 671. Rotating plate; 672. Positioning rod; 673. Insertion block; 68. Rotating tube; 681. Second rotating groove; 682. Second positioning groove. Detailed Implementation

[0019] The following is in conjunction with the appendix Figures 1-14 This application will be described in further detail.

[0020] This application discloses an encrypted soft-seal gate valve. (Refer to...) Figure 1-14 The encrypted soft-seal gate valve includes a pipe section 1, a gate housing 11, a gate plate 2, and a valve stem 3. Two pipe sections 1 are provided, each integrally formed on both ends of the bottom of the gate housing 11. The gate plate 2 is located inside the gate housing 11, which is used for the vertical lifting and lowering of the gate plate 2. The valve stem 3 is rotatably connected to the top of the gate housing 11, and its bottom end is threadedly connected to the top of the gate plate 2. Two gate plates 2 are provided, connected by a connecting part 21. Both gate plates 2 have annular grooves 22 on their far sides, and sealing rings 23 are slidably disposed within these grooves. Both pipe sections 1 have annular sealing grooves 12 on their near ends, and the sealing rings 23 are pressed against the bottom surface of the annular sealing grooves 12. A driving mechanism 4 is installed between the two gate plates 2 to drive the two sealing rings 23 to slide, and the side of the gate plate 2 slides against the inner wall of the gate housing 11 and the end face of the pipe section 1.

[0021] When the gate valve 2 needs to be sealed, the valve stem 3 is driven to rotate, and the valve stem 3 drives the gate valve 2 to descend. The gate valve 2 moves downward from the top of the gate housing 11, and the gate valve 2 gradually covers the pipe section 1 until the gate valve 2 is aligned with the pipe section 1 and the sealing ring 23 is aligned with the annular sealing groove 12. The drive assembly 42 drives the two sealing rings 23 to gradually extend out of the annular groove 22 and enter the annular sealing groove 12. The sealing rings 23 are pressed against the bottom of the annular sealing groove 12 and fill the annular sealing groove 12, thus achieving a seal between the gate valve 2 and the pipe section 1 and cutting off the fluid transported by the pipeline. The sealing is achieved by positive pressure of the sealing rings 23, which avoids friction of the sealing rings 23 and reduces wear of the sealing rings 23. Furthermore, the annular sealing groove 12 accommodates the sealing rings 23, preventing the sealing rings 23 from being washed away and contaminated by the fluid, reducing the residue of dirt on the sealing surface of the sealing rings 23, thereby extending the service life of the sealing rings 23 and improving the sealing performance of the gate valve.

[0022] An annular oil passage 24 is provided inside the gate 2, and the annular oil passage 24 is connected to the annular groove 22. An annular piston 25 is provided inside the annular oil passage 24. A slip ring 26 is connected to the side of the annular piston 25 near the annular groove 22. An annular mounting groove 261 for installing a sealing ring 23 is provided on the end face of the slip ring 26 away from the annular piston 25. The end of the slip ring 26 away from the annular piston 25 extends out of the annular groove 22. An annular limiting groove 13 for the end of the slip ring 26 to enter is provided on the end face of the pipe section 1. The drive mechanism 4 is used to inject hydraulic oil into both sides of the annular piston 25 in the annular oil passage 24.

[0023] When the sealing ring 23 needs to extend out of the annular groove 22, the drive mechanism 4 injects hydraulic oil into the annular oil passage 24 on the side of the annular piston 25 away from the slip ring 26. The hydraulic oil pushes the annular piston 25, which drives the slip ring 26. The slip ring 26 drives the sealing ring 23 to extend out of the annular groove 22, and the end of the slip ring 26 is inserted into the annular limiting groove 13 to limit the slip ring 26 and improve the stability of the gate 2.

[0024] The drive mechanism 4 includes two hydraulic cylinders 41 and a drive assembly 42. Two hydraulic cylinders 41 are provided, each injecting hydraulic oil into one of the two annular oil passages 24. The drive assembly 42 is mounted on the bottom end of the valve stem 3. The two hydraulic cylinders 41 are mounted between the two gate plates 2, located on opposite sides of the drive assembly 42. A piston head 411 is provided inside each hydraulic cylinder 41. A first piston rod 412 is connected to one end of the piston head 411 near the drive assembly 42, extending beyond the end face of the hydraulic cylinder 41. A second piston rod 413 is connected to the other end of the piston head 411. The other end of piston rod 413 extends beyond the other end of piston rod 41. The diameter of piston rod 412 is smaller than that of piston rod 413. A first oil pipe 414 is connected to the end circumferential surface of piston rod 411 near drive assembly 42. The end of first oil pipe 414 is connected to the end of annular oil passage 24 near connecting part 21. A second oil pipe 415 is connected to the end circumferential surface of piston rod 411 away from drive assembly 42. A connecting channel 416 is provided on the end circumferential surface of annular oil passage 24 near annular groove 22. Second oil pipe 415 is connected to the connecting channel 416. Drive assembly 42 is used to drive the two first piston rods 412 to move.

[0025] When hydraulic oil needs to be injected into the annular oil passage 24, the drive assembly 42 drives the first piston rod 412 to move. When the two first piston rods 412 approach each other, the piston head 411 squeezes the hydraulic oil from the first oil passage into the annular oil passage 24. The annular piston 25 pushes the hydraulic oil in the annular oil passage 24 back into the cylinder 41 through the connecting channel 416 and the second oil pipe 415. When the two first piston rods 412 move away from each other, the piston head 411 pushes the hydraulic oil in the cylinder 41 into the annular oil passage 24 through the second oil pipe 415 and the connecting channel 416. The piston head 411 pushes the hydraulic oil in the annular oil passage 24 back into the cylinder 41.

[0026] The drive assembly 42 includes an upper push block 421, a sliding block 422, a lower push block 423, and a U-shaped connecting frame 424. The upper push block 421 is located at the bottom end of the valve stem 3, and its diameter is the same as that of the valve stem 3. The bottom end of the upper push block 421 has two inclined surfaces, which face the first piston rod 412. A connecting plate 4211 is connected to the bottom surface of the upper push block 421. Two lower push blocks 423 are provided, and the two lower push blocks 423 are respectively connected to the two sides of the bottom end of the connecting plate 4211. The top surface of the lower push block 423 is inclined, and the inclined surfaces of the two lower push blocks 423 are respectively connected to the upper push block 421. The two inclined surfaces of the upper push block 421 are parallel, and the diameter of the lower push block 423 is larger than that of the upper push block 421; two sliding blocks 422 are provided, and the two sliding blocks 422 slide between the inclined surfaces of the upper push block 421 and the lower push block 423 respectively; two U-shaped connecting frames 424 are provided, and the two ends of the two U-shaped connecting frames 424 are respectively connected to the two sides of the two sliding blocks 422. The lower push block 423 is located inside the U-shaped connecting frame 424, and two second piston rods 413 are connected to the middle position of the two U-shaped connecting frames 424; a driving component 5 for driving the upper push block 421 to rise and fall is installed inside the valve stem 3.

[0027] A rotating seat 31 is installed at the top of the valve stem 3. The rotating seat 31 is rotatably connected to the top of the gate housing 11 via a bearing. The driving component 5 includes an internally threaded tube 51 and a screw 52. The internally threaded tube 51 passes through the valve stem 3. The top of the internally threaded tube 51 is rotatably connected to the rotating seat 31 via a bearing. The screw 52 passes through the internally threaded tube 52 and is threadedly connected. The bottom end of the screw 52 is rotatably connected to the top surface of the upper push block 421 via a bearing.

[0028] When the first piston rod 412 needs to be driven to move, the drive screw 52 rotates, and the screw 52 moves up and down within the internal threaded tube 51. The screw 52 drives the upper push block 421 to move up and down, and the upper push block 421 drives the lower push block 423 to move up and down through the connecting plate 4211. When the upper push block 421 descends, the upper push block 421 squeezes the two sliding blocks 422 out between the upper push block 421 and the lower push block 423 through the inclined surface. At this time, the bottom surface of the sliding block 422 is still in contact with the inclined surface of the lower push block 423. 2. When the two sliding blocks 422 move away from each other, the two sliding blocks 422 drive the two U-shaped connecting frames 424 away from each other, and the two U-shaped connecting frames 424 drive the two first piston rods 412 away from each other; when the lower pushing block 423 rises, the lower pushing block 423 pushes the two sliding blocks 422 between the upper pushing block 421 and the lower pushing block 423 through the inclined surface, and the two sliding blocks 422 move closer to each other horizontally, and the two sliding blocks 422 drive the two U-shaped connecting frames 424 to move closer to each other, and the two U-shaped connecting frames 424 drive the two first piston rods 412 to move closer to each other.

[0029] A protective shell 111 is installed on the outer periphery of the two gates 2, which encloses the space between the two gates 2; a threaded seat 112 is installed on the top surface of the protective shell 111, and the valve stem 3 passes through the threaded seat 112. The valve stem 3 is threadedly connected to the threaded seat 112 and passes through the protective shell 111; the drive mechanism 4 between the two gates 2 is protected by the protective shell 111.

[0030] A rotating mechanism 6 for driving the screw 52 to rotate is installed on the top of the rotating seat 31. The rotating mechanism 6 includes a turntable 61, a rotating rod 62, a rotating plate 63, a rotating shaft 64, a first spring 65, a hexagonal prism 66, and a positioning element 67. A driving plate 521 is connected to the top of the screw 52. The driving plate 521 rotates within the rotating seat 31. A sliding cavity 311 for the driving plate 521 to rise and fall is provided on the top surface of the rotating seat 31. The bottom of the rotating shaft 64 rotates within the top of the sliding cavity 311, and the bottom surface of the rotating shaft 64 is in contact with the top surface of the driving plate 521. A receiving cavity 641 is provided inside the rotating shaft 64. The hexagonal prism 66 is disposed within the receiving cavity 641, and the top surface of the hexagonal prism 66 is connected to... A sliding plate 661 is attached, which slides against the inner wall of the receiving cavity 641. The bottom end of the hexagonal prism 66 extends out of the bottom surface of the rotating shaft 64. The top surface of the drive plate 521 is provided with a first rotating groove 5211 for the hexagonal prism 66 to be inserted. A first spring 65 is disposed in the receiving cavity 641, with one end of the first spring 65 pressed against the top surface of the sliding plate 661 and the other end of the first spring 65 pressed against the top surface of the receiving cavity 641. A rotating plate 63 is connected to the top end of the rotating shaft 64. The bottom end of the rotating rod 62 is rotatably connected to the rotating plate 63 through a bearing. A turntable 61 is connected to the top end of the rotating rod 62. A positioning member 67 is installed on the circumference of the rotating rod 62 and is used to connect to the rotating plate 63.

[0031] The rotating rod 62 is a hexagonal prism; the positioning component 67 includes a rotating plate 671 and positioning rods 672. The rotating plate 671 is sleeved on the rotating rod 62. There are four positioning rods 672. The top ends of the four positioning rods 672 are connected to the circumference of the rotating plate 671. The four positioning rods 672 are evenly distributed around the circumference of the rotating plate 671. The inner side of the bottom end of the positioning rods 672 is connected to a plug-in block 673. The circumference of the rotating plate 63 is connected to four positioning blocks 631. The positioning blocks 631 are evenly distributed around the circumference of the rotating plate 63. The top surface of the positioning blocks 631 is provided with a first positioning groove 6311 for the plug-in block 673 to be inserted.

[0032] A rotating tube 68 is fitted around the rotating shaft 64. The inner top wall of the rotating tube 68 is rotatably connected to the top circumference of the rotating shaft 64 via a bearing. The top of the rotating seat 31 is a hexagonal block 312. The inner bottom wall of the rotating tube 68 is provided with a second rotating groove 681 for the hexagonal block 312 to be inserted. The top surface of the rotating tube 68 is provided with four second positioning grooves 682 for the four plug-in blocks 673 to be inserted. The four second positioning grooves 682 are evenly distributed around the circumference of the rotating tube 68.

[0033] When it is necessary to drive the screw 52 to rotate, align the rotating shaft 64 of the rotating mechanism 6 with the sliding cavity 311, so that the hexagonal prism 66 is inserted into the first rotating groove 5211. Continue to press down the turntable 61, and the hexagonal prism 66 contacts the bottom of the first positioning groove 6311 and presses up the first spring 65. Rotate the rotating tube 68 so that the hexagonal block 312 of the rotating seat 31 is inserted into the second rotating groove 681. First, insert the docking block into the first positioning groove 6311 and drive the turntable 61 to rotate. The turntable 61 drives the rotating plate 671 to rotate through the rotating rod 62. The rotating plate 671 drives the rotating plate 63 to rotate through the plug block 673 and the positioning block 631. The rotating plate 63 drives the hexagonal prism 66 to rotate through the rotating shaft 64. The hexagonal prism 66 drives the screw 52 to rotate through the driving plate 521. During the lifting and lowering process of the screw 52, ​​the hexagonal prism 66 is always pressed against the bottom surface of the first rotating groove 5211 through the first spring 65.

[0034] When it is necessary to drive the valve stem 3 to rotate, lift the rotating plate 671 upwards. The rotating plate 671 drives the plug block 673 to disengage from the first positioning groove 6311, drives the rotating rod 62 to rotate, and the rotating rod 62 drives the rotating plate 671 to rotate, so that the plug block 673 is aligned with the second positioning groove 682. Lower the rotating plate 671 so that the plug block 673 is inserted into the second positioning groove 682. Drive the turntable 61 to rotate. The turntable 61 drives the rotating plate 671 to rotate through the rotating rod 62. The rotating plate 671 rotates through the plug block 673 and the rotating tube 68. The rotating tube 68 drives the rotating seat 31 to rotate through the hexagonal block 312. The rotating seat 31 drives the valve stem 3 to rotate.

[0035] When the gate 2 needs to rise, the two sliding blocks 422 are driven to move away from between the upper pushing block 421 and the lower pushing block 423. At this time, the sealing ring 23 and the slip ring 26 are retracted into the annular groove 22, releasing the restriction on the gate 2. Then, the valve stem 3 is driven to rotate, and the valve stem 3 drives the gate 2 to rise, and the inner side of the sliding plate slides on the outer circumference of the valve stem 3. When the gate 2 needs to fall, the valve stem 3 drives the gate 2 to fall to the corresponding position, and then drives the sliding block 422 to move between the upper pushing block 421 and the lower pushing block 423. The sealing ring 23 seals the annular sealing groove 12.

[0036] Two symmetrically arranged through holes 5212 are provided in the drive plate 521, and limit rods 522 are provided in the through holes 5212. The end faces of the limit rods 522 are connected to arc-shaped plates 523, which slide at the bottom of the through holes 5212 and extend into the first rotating groove 5211. The top surface of the end of the arc-shaped plate 523 away from the limit rods 522 is connected to a wedge block 524. The bottom surface of the hexagonal prism 66 is provided with six clearance grooves 662, which extend along the drive plate 521. 21. The circumference is evenly distributed, and the clearance groove 662 is used for the arc plate 523 to enter. The bottom of the clearance groove 662 is provided with a wedge groove 663 for the wedge block 524 to slide into. The top inner wall of the through hole 5212 is connected to a baffle 525. A second spring 526 is provided above the arc plate 523. One end of the second spring 526 is pressed against the limiting rod 522, and the other end of the second spring 526 is pressed against the baffle 525. The inner wall of the sliding cavity 311 is provided with an annular sliding groove 313 for the limiting rod 522 to rotate.

[0037] By inserting the limiting rod 522 into the annular groove 313, the drive plate 521 and the rotating seat 31 are bound together. It is difficult to rotate the rotating seat 31 alone. Driving the drive plate 521 requires a specific hexagonal prism 66. The hexagonal prism 66 is inserted into the first rotating groove 5211. The wedge groove 663 pulls the arc plate 523 through the wedge block 524. The arc plate 523 pulls the limiting rod 522. The limiting rod 522 compresses the second spring 526, so that the limiting rod 522 is disengaged from the annular groove 313, which facilitates the raising and lowering of the drive plate 521.

[0038] The drive mechanism 4 is a specific encryption mechanism that requires the switch gate 2 and the drive mechanism 4 to function.

[0039] Two guide plates 113 are connected to the two symmetrical sides of the gate housing 11, and the two sides of the protective housing 111 slide on the sides of the two guide plates 113 that are close to each other.

[0040] The implementation principle of the encrypted soft-seal gate valve in this application embodiment is as follows: When the gate plate 2 needs to be sealed, the valve stem 3 is driven to rotate, and the valve stem 3 drives the gate plate 2 to descend. The gate plate 2 moves downward from the top of the gate shell 11, and the gate plate 2 gradually covers the pipeline section 1 until the gate plate 2 is aligned with the pipeline section 1 and the sealing ring 23 is aligned with the annular sealing groove 12. The drive assembly 42 drives the two sealing rings 23 to gradually extend out of the annular groove 22 and enter the annular sealing groove 12. The sealing rings 23 are pressed against the bottom of the annular sealing groove 12 and fill the annular sealing groove 12, thereby achieving a seal between the gate plate 2 and the pipeline section 1 and cutting off the fluid transported by the pipeline. The sealing is achieved by positive pressure of the sealing rings 23, which avoids friction of the sealing rings 23 and reduces wear of the sealing rings 23. Furthermore, the annular sealing groove 12 accommodates the sealing rings 23, preventing the sealing rings 23 from being washed away and contaminated by the fluid, reducing the residue of dirt on the sealing surface of the sealing rings 23, thereby extending the service life of the sealing rings 23 and improving the sealing performance of the gate valve.

[0041] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A type of encrypted soft-seal gate valve, characterized in that: It includes a pipe section (1), a gate housing (11), a gate plate (2), and a valve stem (3); there are two pipe sections (1), which are integrally formed on the two ends of the bottom of the gate housing (11), and the gate plate (2) is set inside the gate housing (11). The gate housing (11) is used for the vertical lifting and lowering of the gate plate (2); the valve stem (3) is rotatably connected to the top of the gate housing (11), and the bottom end of the valve stem (3) is threadedly connected to the top of the gate plate (2); there are two gate plates (2), which are connected by a connecting part (21). The two gate plates (2) are provided with annular grooves (22) on the sides of the two gate plates (2) that are far apart from each other. A tight seal is slidably arranged in the annular grooves (22). A sealing ring (23) is provided; annular sealing grooves (12) are provided on the end faces of the two pipe sections (1) that are close to each other, and the end face of the sealing ring (23) is pressed against the bottom surface of the annular sealing groove (12); a driving mechanism (4) for driving the two sealing rings (23) to slide is installed between the two gates (2), and the side of the gate (2) slides against the inner wall of the gate shell (11) and the end face of the pipe section (1); annular oil passage (24) is provided in the gate (2), and the annular oil passage (24) is connected to the annular groove (22); the driving mechanism (4) includes a cylinder (41) and a driving assembly (42), and there are two cylinders (41), which are respectively directed towards the... Hydraulic oil is injected into two annular oil passages (24); a drive assembly (42) is installed at the bottom of the valve stem (3), and two cylinders (41) are installed between two gates (2), with the two cylinders (41) located on both sides of the drive assembly (42); a piston head (411) is provided inside the cylinder (41), and a first piston rod (412) is connected to one end of the piston head (411) near the drive assembly (42), with the first piston rod (412) extending out of the end face of the cylinder (41), and a second piston rod (413) is connected to the other end of the piston head (411), with the other end of the second piston rod (413) extending out of the other end of the cylinder (41), the first piston... The diameter of the piston rod (412) is smaller than the diameter of the second piston rod (413); the end circumference of the cylinder (41) near the drive assembly (42) is connected to the first oil pipe (414), and the end of the first oil pipe (414) is connected to the end of the annular oil passage (24) near the connecting part (21); the end circumference of the cylinder (41) away from the drive assembly (42) is connected to the second oil pipe (415), and the end circumference of the annular oil passage (24) near the annular groove (22) is provided with a connecting channel (416), and the second oil pipe (415) is connected to the connecting channel (416); the drive assembly (42) is used to drive the two first piston rods (412) to move.

2. The encrypted soft-seal gate valve according to claim 1, characterized in that: An annular piston (25) is provided in the annular oil passage (24). A slip ring (26) is connected to the side of the annular piston (25) near the annular groove (22). An annular mounting groove (261) for installing a sealing ring (23) is provided on the end face of the slip ring (26) away from the annular piston (25). The end of the slip ring (26) away from the annular piston (25) extends out of the annular groove (22). An annular limiting groove (13) for the end of the slip ring (26) to enter is provided on the end face of the pipe section (1). The drive mechanism (4) is used to inject hydraulic oil into both sides of the annular piston (25) in the annular oil passage (24).

3. The encrypted soft-seal gate valve according to claim 1, characterized in that: The drive assembly (42) includes an upper push block (421), a sliding block (422), a lower push block (423), and a U-shaped connecting frame (424). The upper push block (421) is located at the bottom end of the valve stem (3), and the diameter of the upper push block (421) is the same as the diameter of the valve stem (3). The bottom end of the upper push block (421) is provided with two inclined surfaces, which face the first piston rod (412) respectively. A connecting plate (4211) is connected to the bottom surface of the upper push block (421). There are two lower push blocks (423), which are respectively connected to the two sides of the bottom end of the connecting plate (4211). The top surface of the lower push block (423) is inclined, and the inclined surfaces of the two lower push blocks (423) are respectively connected to the two sides of the bottom end of the connecting plate (4211). The two inclined surfaces of the upper push block (421) are parallel, and the diameter of the lower push block (423) is larger than that of the upper push block (421). There are two sliding blocks (422), which slide between the inclined surfaces of the upper push block (421) and the lower push block (423). There are two U-shaped connecting frames (424), with the two ends of the two U-shaped connecting frames (424) connected to the two sides of the two sliding blocks (422). The lower push block (423) is located inside the U-shaped connecting frame (424), and the two second piston rods (413) are connected to the middle position of the two U-shaped connecting frames (424). A driving component (5) for driving the upper push block (421) to rise and fall is installed inside the valve stem (3).

4. The encrypted soft-seal gate valve according to claim 3, characterized in that: A rotating seat (31) is installed at the top of the valve stem (3). The rotating seat (31) is rotatably connected to the top of the gate housing (11). The driving component (5) includes an internal threaded tube (51) and a screw (52). The internal threaded tube (51) passes through the valve stem (3). The top of the internal threaded tube (51) is rotatably connected to the rotating seat (31). The screw (52) passes through the internal threaded tube (51) and is threaded. The bottom end of the screw (52) is rotatably connected to the top surface of the upper push block (421).

5. The encrypted soft-seal gate valve according to claim 1, characterized in that: A protective shell (111) is installed on the outer periphery of the two gates (2), and the protective shell (111) encloses the space between the two gates (2); a threaded seat (112) is installed on the top surface of the protective shell (111), and the valve stem (3) passes through the threaded seat (112). The valve stem (3) is threadedly connected to the threaded seat (112), and the valve stem (3) passes through the protective shell (111).

6. The encrypted soft-seal gate valve according to claim 4, characterized in that: A rotating mechanism (6) for driving the screw (52) to rotate is installed on the top of the rotating seat (31); the rotating mechanism (6) includes a turntable (61), a rotating rod (62), a rotating plate (63), a rotating shaft (64), a first spring (65), a hexagonal prism (66), and a positioning element (67); a driving plate (521) is connected to the top of the screw (52), the driving plate (521) rotates in the rotating seat (31), the top surface of the rotating seat (31) is provided with a sliding cavity (311) for the driving plate (521) to rise and fall, the bottom of the rotating shaft (64) rotates in the top of the sliding cavity (311), and the bottom surface of the rotating shaft (64) is in contact with the top surface of the driving plate (521); a receiving cavity (641) is provided in the rotating shaft (64), and the hexagonal prism (66) is provided in the receiving cavity (641). 6) A sliding plate (661) is connected to the top surface. The sliding plate (661) slides on the inner wall of the receiving cavity (641). The bottom end of the hexagonal prism (66) extends out of the bottom surface of the rotating shaft (64). The top surface of the drive plate (521) is provided with a first rotating groove (5211) for the hexagonal prism (66) to be inserted. A first spring (65) is provided in the receiving cavity (641). One end of the first spring (65) is pressed against the top surface of the sliding plate (661), and the other end of the first spring (65) is pressed against the top surface of the receiving cavity (641). A rotating plate (63) is connected to the top end of the rotating shaft (64). The bottom end of the rotating rod (62) is rotatably connected to the rotating plate (63). A turntable (61) is connected to the top end of the rotating rod (62). A positioning piece (67) is installed on the circumference of the rotating rod (62). The positioning piece (67) is used to connect to the rotating plate (63).

7. The encrypted soft-seal gate valve according to claim 6, characterized in that: The rotating rod (62) is a hexagonal prism; the positioning component (67) includes a rotating plate (671) and positioning rods (672). The rotating plate (671) is sleeved on the rotating rod (62). There are four positioning rods (672). The top ends of the four positioning rods (672) are connected to the circumference of the rotating plate (671). The four positioning rods (672) are evenly distributed around the circumference of the rotating plate (671). The inner side of the bottom end of the positioning rod (672) is connected to a plug-in block (673). The circumference of the rotating plate (63) is connected to four positioning blocks (631). The positioning blocks (631) are evenly distributed around the circumference of the rotating plate (63). The top surface of the positioning block (631) is provided with a first positioning groove (6311) for the plug-in block (673) to be inserted.

8. The encrypted soft-seal gate valve according to claim 7, characterized in that: A rotating tube (68) is fitted around the rotating shaft (64), and the inner wall of the top of the rotating tube (68) is rotatably connected to the top circumference of the rotating shaft (64); the top of the rotating seat (31) is a hexagonal block (312), and the inner wall of the bottom end of the rotating tube (68) is provided with a second rotating groove (681) for the hexagonal block (312) to be inserted; the top surface of the rotating tube (68) is provided with four second positioning grooves (682) for the insertion of four plug-in blocks (673), and the four second positioning grooves (682) are evenly distributed around the circumference of the rotating tube (68).

9. A cryptographic soft-seal gate valve according to claim 6, characterized in that: Two symmetrically arranged through holes (5212) are provided in the drive plate (521), and limit rods (522) are provided in the through holes (5212); the end faces of the limit rods (522) are connected to arc plates (523), the arc plates (523) slide at the bottom of the through holes (5212), and the arc plates (523) extend into the first rotating groove (5211); the top surface of the end of the arc plate (523) away from the limit rods (522) is connected to a wedge block (524), and the bottom surface of the hexagonal prism (66) is provided with six clearance grooves (662), the six clearance grooves (662) are arranged along the drive plate (521). 21) The circumference is evenly distributed, and the clearance groove (662) is used for the arc plate (523) to enter. The bottom of the clearance groove (662) is provided with a wedge groove (663) for the wedge block (524) to slide into. The top inner wall of the through hole (5212) is connected with a baffle (525). A second spring (526) is provided above the arc plate (523). One end of the second spring (526) is pressed against the limiting rod (522), and the other end of the second spring (526) is pressed against the baffle (525). The inner wall of the sliding cavity (311) is provided with an annular sliding groove (313) for the limiting rod (522) to rotate.

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