Linkage control device for three valves of bypass pipeline

Abstract

The invention relates to the technical field of valve control equipment, in particular to a bypass pipeline three-valve linkage control device which comprises a first valve, a second valve and a third valve, a first door leaf is movably mounted on the first valve, a second door leaf is slidably mounted on the second valve, and a third door leaf is movably mounted on the third valve; the first valve and the second valve are connected with a first control assembly for controlling the first door leaf and the second door leaf to be opened and closed, and the first control assembly and the third valve are connected with a second control assembly for controlling the third door leaf to be opened and closed. The bypass pipeline three-valve linkage control device has the effect that the convenience of the bypass pipeline three-valve linkage control device in the operation process is improved.

Description

Technical Field

[0001] This application relates to the field of valve control equipment technology, and in particular to a three-valve linkage control device for a bypass pipeline. Background Technology

[0002] In industrial piping systems, bypass lines are widely used to regulate main line flow, reduce system pressure, or switch flow paths during equipment maintenance. Common bypass systems typically employ multiple valves to control the opening and closing of the main and bypass lines. For example, in a high-temperature gas transmission pipeline, high-temperature gas is normally delivered to the equipment pipeline via the main line; when equipment malfunctions or requires maintenance, the bypass line must be opened to divert the gas to a backup or venting pipeline. This requires the coordinated operation of multiple valves to achieve a rapid and safe switching of flow paths.

[0003] Currently, most multi-valve systems employ independent control, meaning each valve is driven by a separate actuator. This approach not only increases system complexity and manufacturing costs but also requires individual valve control during operation, resulting in low efficiency. Furthermore, it struggles to achieve rapid, synchronized valve switching in emergency situations, posing risks of misoperation or delayed response. While some mechanical linkage solutions have been proposed to synchronize the actions of some valves, their structures are often relatively simple, making it difficult to achieve coordinated control with temporal or logical relationships between the three valves. Particularly under certain process requirements, it is necessary for one valve to open or close with an appropriate delay to accommodate airflow stabilization or equipment protection needs; traditional linkage mechanisms struggle to achieve such precise timing control. Summary of the Invention

[0004] To improve the ease of operation of the three-valve linkage control device for bypass pipelines, this application provides a three-valve linkage control device for bypass pipelines.

[0005] This application provides a three-valve linkage control device for a bypass pipeline, which adopts the following technical solution: A bypass pipeline three-valve linkage control device includes a first valve, a second valve, and a third valve. A first door leaf is movably mounted on the first valve, a second door leaf is slidably mounted on the second valve, and a third door leaf is movably mounted on the third valve. A first control component for controlling the opening and closing of the first and second door leaves is connected to the first valve and the second valve, and a second control component for controlling the opening and closing of the third door leaf is connected to the first control component and the third valve.

[0006] By adopting the above technical solution, and by setting up a first control component and a second control component, and establishing a linkage between them, it is possible to synchronously control the opening and closing of the first and second valves by simply driving the first control component, and then control the action of the third valve according to a predetermined program via the second control component. This achieves centralized linkage control of three valves driven by a single power source, greatly simplifying the operation steps, improving control efficiency, and enabling the realization of specific timing relationships between valve actions through mechanical structure design.

[0007] In one specific implementation, the first control component includes a mounting plate on which a first servo motor is mounted. The output shaft of the first servo motor is connected to a first connecting rod, which is connected to the first door leaf. A first swing plate is mounted on the first connecting rod, and first push-pull rods are respectively hinged to both ends of the first swing plate. The two first push-pull rods are arranged in parallel. A second swing plate is hinged to the first push-pull rod, which is arranged in parallel with the first swing plate. A second connecting rod is mounted on the second swing plate, which is connected to the second door leaf.

[0008] By adopting the above technical solution, the first servo motor acts as a single power source, directly driving the first door leaf through the first connecting rod. Simultaneously, the first connecting rod drives the first swing plate to oscillate, transmitting the motion to the second swing plate via two parallel first push-pull rods. The second swing plate then drives the second door leaf through the second connecting rod. This linkage mechanism ensures that the first and second valves can be precisely and synchronously driven by a single motor, resulting in a compact structure and reliable transmission.

[0009] In one specific implementation, the second control component includes a support frame connected to the third valve. A fixed rod is mounted on the support frame, and a slide cylinder is slidably mounted on the fixed rod. A turntable is rotatably mounted on the support frame, and a fourth rocker arm is connected to the turntable. A first movable rod is hinged to the fourth rocker arm and is hinged to the slide cylinder. A base is mounted on the support frame, and a gear plate is rotatably mounted on the base. A second movable rod is hinged to the gear plate and is hinged to the slide cylinder. A rack is slidably mounted on the base and meshes with the gear plate. A slide plate is mounted on the rack. A second sliding groove is provided on the support frame, and the slide plate is slidably connected to the support frame through the second sliding groove. A first spring is connected to the slide plate, and a slider for controlling the opening and closing of the third door is connected to the end of the first spring away from the slide plate. The slider is also slidably mounted on the support frame through the second sliding groove. A stop component for controlling the movement of the slider is mounted on the support frame.

[0010] By adopting the above technical solution, the rotation of the turntable is converted into the linear motion of the slide cylinder through the fourth rocker arm and the first movable rod. The motion of the slide cylinder is transmitted through the first movable rod and also drives the gear plate to rotate through the second movable rod. The rotation of the gear plate drives the rack to move linearly, thereby moving the slide plate. The slide plate pushes the slider through the first spring, while the blocking component provides phased control over the movement of the slider. This transmission system converts rotational motion into linear motion, and together with the blocking component, provides a structural basis for achieving the delayed release of the third valve relative to the first and second valves.

[0011] In one specific implementation, a third swing arm is connected to the third door leaf, and a third lever is hinged to the third swing arm; a guide plate is installed on the third lever, and a guide groove is formed on the guide plate, the guide groove including a first groove segment and a second groove segment, the first groove segment and the second groove segment being arranged perpendicularly; a vertical plate is installed on the upright frame, and a lifting block is slidably installed on the vertical plate, an insert rod is installed on the lifting block, the insert rod extends into the first groove segment and is slidably connected to the guide plate, and a third movable rod is hinged to the lifting block, the end of the third movable rod away from the lifting block being hinged to the slider.

[0012] By adopting the above technical solution, the linear motion of the slider is converted into the vertical sliding of the lifting block through the third movable rod. The lifting block drives the insertion rod to move along the first groove section of the guide groove, thereby pushing the guide plate and the third lever to swing. Finally, the third door leaf is driven to rotate through the third swing rod, realizing the opening and closing of the third valve. The vertically set first groove section and second groove section can realize the precise conversion of the movement direction during the movement of the insertion rod, ensuring the stability and accuracy of the third door leaf movement.

[0013] In one specific implementation, the blocking assembly includes a first sliding sleeve mounted on the upright frame, a first sliding rod slidably mounted on the first sliding sleeve, a pressure plate mounted on the first sliding rod, a second spring sleeved on the first sliding rod, a pressure block mounted on the pressure plate, and a first pressure rod and a second pressure rod mounted on the sliding plate to press the pressure block, the first pressure rod and the second pressure rod being spaced apart; a second sliding sleeve mounted on the upright frame, a second sliding rod slidably mounted on the second sliding sleeve, a carrier plate mounted on the second sliding rod, a third spring sleeved on the second sliding rod, a push block mounted on the pressure plate to push the carrier plate to move, the push block abutting against the carrier plate, and a stop block mounted on the carrier plate to block the movement of the slider.

[0014] By adopting the above technical solution, when the slide plate moves, it drives the first or second pressure rod to press the pressure block, causing the pressure plate to move down along the first sliding sleeve and compress the second spring. At the same time, the push block pushes the carrier plate along the second sliding sleeve through the inclined surface, causing the stop block to disengage from the second sliding groove and release the obstruction to the slider. When the first or second pressure rod disengages from the pressure block, the second and third springs reset, and the stop block re-extends into the second sliding groove to block the slider, thereby achieving phased control of the slider movement and thus achieving the delayed action of the third valve.

[0015] In one specific implementation, the end of the pressure block away from the pressure plate is set as an arc-shaped surface, and the side of the push block that abuts against the carrier plate is opened as a beveled surface.

[0016] By adopting the above technical solutions, the arc-shaped surface of the pressure block can reduce the friction when the first pressure rod, the second pressure rod and the pressure block come into contact, making the pressing action smoother; the beveled surface of the push block can convert the vertical downward movement of the pressure plate into the horizontal movement of the carrier plate, realize the conversion of the force direction, and improve the continuity and reliability of the action of the resisting component.

[0017] In one specific implementation scheme, the first control component is connected to the turntable via a linkage, the linkage including a third swing plate, the third swing plate being connected to the first control component, the two ends of the third swing plate being hinged with second push-pull rods, the two second push-pull rods being arranged in parallel, and the ends of the two second push-pull rods away from the third swing plate being hinged with a fourth swing plate, the fourth swing plate being arranged in parallel with the third swing plate, and the fourth swing plate being connected to the turntable.

[0018] By adopting the above technical solution, the power of the first control component is transmitted to the turntable through the third swing plate, the parallel second push-pull rod and the fourth swing plate, forming a stable parallelogram linkage mechanism, ensuring the accuracy and synchronization of power transmission, and making the rotation of the turntable strictly match the action of the first control component, providing structural guarantee for the linkage timing control of the three valves.

[0019] In one specific implementation, a first sliding groove is provided on the sliding cylinder, and a limiting piece is installed on the fixed rod. The limiting piece extends into the first sliding groove and is slidably connected to the sliding cylinder.

[0020] By adopting the above technical solution, the cooperation between the limiting plate and the first sliding groove plays a guiding and limiting role in the sliding of the slide cylinder, preventing the slide cylinder from deviating or rotating during the movement, ensuring that the slide cylinder moves stably along the axis of the fixed rod, and improving the accuracy of the transmission of the second control component.

[0021] In one specific implementation, the second groove is an inverted T-shaped groove, the cross-section of the slide plate is inverted T-shaped, and the slider is also an inverted T-shaped block.

[0022] By adopting the above technical solution, the inverted T-shaped slide plate and slider are adapted to the second inverted T-shaped slide groove, which can not only ensure that the slide plate and slider slide smoothly along the second slide groove, but also limit their vertical displacement, avoid the situation of detaching from the slide groove during the sliding process, and improve the stability of the structural connection and the reliability of the movement.

[0023] In summary, this application includes at least one of the following beneficial technical effects: 1. More convenient linkage control: The first control component is driven by a single power source to simultaneously open and close the first and second valves, and the second control component controls the action of the third valve. There is no need to operate the valves one by one, which greatly simplifies the operation steps and improves the control efficiency.

[0024] 2. Precise timing control: By using the blocking component and spring storage structure, the opening and closing of the third valve is delayed relative to the first and second valves, which meets the precise timing requirements for airflow stability and equipment protection in industrial pipelines, and avoids the control lag problem of traditional linkage mechanisms.

[0025] 3. Compact and reliable structure: It adopts mechanical structures such as parallel linkage mechanism and gear rack transmission, with clear transmission path and strong adaptability of parts. The design of inverted T-shaped slide groove and slider, limit plate and first slide groove, etc., effectively prevents movement deviation and improves the stability of device operation. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the valve and linkage device according to an embodiment of this application.

[0027] Figure 2 This is a schematic diagram of the first valve in an embodiment of this application.

[0028] Figure 3 This is a schematic diagram of the third valve in an embodiment of this application.

[0029] Figure 4 This is a schematic diagram of the second control component according to an embodiment of this application.

[0030] Figure 5 This is a schematic diagram of the mounting position of the slider according to an embodiment of this application.

[0031] Figure 6 This is a schematic diagram of the blocking component according to an embodiment of this application.

[0032] Figure 7 This is a schematic diagram of a push block according to an embodiment of this application.

[0033] Reference numerals: 1. First valve; 11. First door frame; 12. First stop frame; 13. First rotating rod; 14. First door leaf; 15. First swing rod; 16. First lever; 2. Second valve; 21. Second door frame; 22. Second stop frame; 23. Second rotating rod; 24. Second door leaf; 25. Second swing rod; 26. Second lever; 3. Third valve; 31. Third door frame; 32. Third stop frame; 33. Third rotating rod 34. Third door leaf; 35. Third swing arm; 36. Third lever; 4. First control component; 41. Mounting plate; 42. First servo motor; 43. First connecting rod; 44. First swing plate; 45. First push-pull rod; 46. Second swing plate; 47. Second connecting rod; 5. Second control component; 51. Stand; 511. Second slide rail; 521. Fixing rod; 5211. Limiting plate; 522. Slide cylinder; 5221. 523. First sliding groove; 524. First movable rod; 525. Turntable; 526. Fourth swing rod; 531. Base; 532. Gear plate; 533. Second movable rod; 534. Rack; 535. Slide plate; 536. First spring; 537. Slider; 541. Guide plate; 542. Guide groove; 5421. First groove segment; 5422. Second groove segment; 543. Vertical plate; 544. Lifting block; 545. Insert rod; 546. Three movable rods; 55, blocking assembly; 551, first sliding sleeve; 552, first sliding rod; 553, pressure plate; 554, second spring; 555, pressure block; 556, first pressure rod; 557, second pressure rod; 561, second sliding sleeve; 562, second sliding rod; 563, carrier plate; 564, third spring; 565, stop block; 566, push block; 571, third swing plate; 572, second push-pull rod; 573, fourth swing plate. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0035] This application discloses a three-valve linkage control device for a bypass pipeline, referring to... Figure 1 and Figure 2 It includes a first valve 1, a second valve 2 and a third valve 3. The first valve 1 and the second valve 2 are arranged in parallel, and the third valve 3 is arranged vertically directly above the first valve 1. A first control component 4 is connected to the first valve 1 and the second valve 2, and a second control component 5 is connected to the first control component 4 and the third valve 3.

[0036] The first valve 1 includes a first door frame 11, on which a first baffle 12 is fixedly installed. A first rotating rod 13 is rotatably installed on the first door frame 11, and a first door leaf 14 is fixedly installed on the first rotating rod 13. Three sets of first door leaves 14 are provided on the first door frame 11. A first swing rod 15 is fixedly installed on the first rotating rod 13 of each set of first door leaves 14. The three first swing rods 15 are arranged parallel to each other, and a first lever 16 is hinged to all three first swing rods 15. The second valve 2 includes a second door frame 21, on which a second baffle 22 is fixedly installed. A second rotating rod 23 is rotatably installed on the second door frame 21, and a second door leaf 24 is fixedly installed on the second rotating rod 23. The second door leaf 24 is arranged parallel to the first door leaf 14. In this embodiment, the structure of the second valve 2 is the same as that of the first valve 1. It is also equipped with a second swing rod 25 and a second lever 26 to control the rotation of the second rotating rod 23. The second swing rod 25 is fixedly connected to the second rotating rod 23, and the second lever 26 is hinged to the second swing rod 25.

[0037] The first control component 4 includes a mounting plate 41, which is used to fix to a wall or a rib connected to the wall. A first servo motor 42 is fixedly mounted on the mounting plate 41. A first connecting rod 43 is fixedly connected to the output shaft of the first servo motor 42. The end of the first connecting rod 43 away from the first servo motor 42 is fixedly connected to a first rotating rod 13. A first swing plate 44 is fixedly mounted on the first connecting rod 43. The center of the first swing plate 44 is connected to the first connecting rod 43. A first push-pull rod 45 is hinged to both ends of the first swing plate 44. The two first push-pull rods 45 are arranged in parallel. A second swing plate 46 is hinged to the end of the two first push-pull rods 45 away from the first swing plate 44. The second swing plate 46 is arranged in parallel with the first swing plate 44. A second connecting rod 47 is fixedly mounted on the second swing plate 46. The second connecting rod 47 is fixedly connected to the second rotating rod 23.

[0038] When it is necessary to switch the first valve 1 and the second valve 2, the first servo motor 42 controls the first connecting rod 43 to rotate. The first connecting rod 43 drives the first rotating rod 13 to rotate, controlling the first door leaf 14 to rotate, thereby realizing the opening and closing of the first door leaf 14. The first connecting rod 43 drives the first swing plate 44 to swing. The first swing plate 44 controls the first push-pull rod 45 to move. The first push-pull rod 45 drives the second swing plate 46 to swing. The second swing plate 46 controls the second connecting rod 47 to rotate. The second connecting rod 47 controls the second rotating rod 23 to rotate, thereby realizing the opening and closing of the second door leaf 24.

[0039] Reference Figure 1 and Figure 3The third valve 3 includes a third door frame 31, a third baffle 32 fixedly mounted on the third door frame 31, a third rotating rod 33 rotatably mounted on the third door frame 31, and a third door leaf 34 fixedly mounted on the third rotating rod 33. In this embodiment, the third valve 3 has the same structure as the first valve 1, and is also equipped with a third swing rod 35 and a third lever 36 for controlling the rotation of the third rotating rod 33. The third swing rod 35 is fixedly connected to the third rotating rod 33, and the third lever 36 is hinged to the third swing rod 35.

[0040] The second control component 5 includes a support frame 51, which is fixedly installed on the third door frame 31. (Refer to...) Figure 4 and Figure 5 A fixed rod 521 is fixedly installed on the upright frame 51. A sliding cylinder 522 is slidably installed on the fixed rod 521. A first sliding groove 5221 is opened on the sliding cylinder 522. A limiting piece 5211 is fixedly installed on the fixed rod 521. The limiting piece 5211 extends into the first sliding groove 5221 and is slidably connected to the sliding cylinder 522. A first movable rod 523 is hinged to the sliding cylinder 522. A turntable 524 is rotatably installed on the upright frame 51. A fourth swing rod 525 is fixedly installed on the turntable 524. The end of the fourth swing rod 525 away from the turntable 524 is hinged to the first movable rod 523.

[0041] A base 531 is fixedly mounted on the upright frame 51, and the base 531 is located below the slide cylinder 522. A gear plate 532 is rotatably mounted on the base 531, and a second movable rod 533 is hinged to the gear plate 532. The end of the second movable rod 533 away from the gear plate 532 is hinged to the slide cylinder 522. A rack 534 is slidably mounted on the base 531, and the rack 534 meshes with the gear plate 532. A slide plate 535 is fixedly mounted on the rack 534. A second slide groove 511 is provided on the upright frame 51. The second slide groove 511 is an inverted T-shaped groove. The cross-section of the slide plate 535 is an inverted T-shape. The slide plate 535 is slidably connected to the upright frame 51 through the second slide groove 511. A first spring 536 is fixedly connected to the slide plate 535. A slider 537 is fixedly connected to the end of the first spring 536 away from the slide plate 535. The slider 537 is also an inverted T-shaped block. The slider 537 is also slidably mounted on the upright frame 51 through the second slide groove 511.

[0042] A guide plate 541 is fixedly installed on the third lever 36. The guide plate 541 has a guide groove 542, which is divided into a first groove segment 5421 and a second groove segment 5422, perpendicular to each other. A vertical plate 543 is fixedly installed on the stand 51. A lifting block 544 is slidably installed on the vertical plate 543. A plug rod 545 is fixedly installed on the lifting block 544, extending into the first groove segment 5421 and slidably connected to the guide plate 541. A third movable rod 546 is hinged to the lifting block 544, with the end of the third movable rod 546 away from the lifting block 544 hinged to the slider 537.

[0043] Reference Figure 5 , Figure 6 and Figure 7 A blocking assembly 55 for controlling the movement of the slider 537 is installed on the support frame 51. The blocking assembly 55 includes a first sliding sleeve 551, which is fixedly installed on the support frame 51. A first sliding rod 552 is slidably installed on the first sliding sleeve 551. A pressure plate 553 is installed on the first sliding rod 552. A second spring 554 is sleeved on the first sliding rod 552. One end of the second spring 554 is fixedly connected to the pressure plate 553, and the other end is fixedly connected to the support frame 51. A pressure block 555 is fixedly installed on the pressure plate 553. The end of the pressure block 555 away from the pressure plate 553 is set as an arc surface. A first pressure rod 556 and a second pressure rod 557 for pressing the pressure block 555 are fixedly installed on the sliding plate 535. The first pressure rod 556 and the second pressure rod 557 are spaced apart. A second sliding sleeve 561 is fixedly installed on the upright frame 51. A second sliding rod 562 is slidably installed on the second sliding sleeve 561. A carrier plate 563 is fixedly installed on the second sliding rod 562. A third spring 564 is sleeved on the second sliding rod 562. One end of the third spring 564 is fixedly connected to the carrier plate 563, and the other end is fixedly connected to the upright frame 51. A push block 566 is fixedly installed on the pressure plate 553 to push the carrier plate 563 to move. The push block 566 abuts against the carrier plate 563. The side of the push block 566 that abuts against the carrier plate 563 is cut with a bevel. A stop block 565 is fixedly installed on the carrier plate 563 to prevent the movement of the slider 537.

[0044] Reference Figure 1 , Figure 2 and Figure 3 A linkage component for controlling the rotation of the turntable 524 is connected to the first connecting rod 43. The linkage component includes a third swing plate 571, which is fixedly installed on the first connecting rod 43. The center of the third swing plate 571 is connected to the first connecting rod 43. The third swing plate 571 is set perpendicular to the first swing plate 44. The two ends of the third swing plate 571 are hinged to second push-pull rods 572, which are arranged in parallel. The ends of the two second push-pull rods 572 away from the third swing plate 571 are hinged to a fourth swing plate 573, which is arranged in parallel with the third swing plate 571. The fourth swing plate 573 is fixedly connected to the turntable 524.

[0045] In this embodiment, the third door leaf 34 is perpendicular to the first door leaf 14, which can be understood as the third door leaf 34 being fully open when the first door leaf 14 is completely closed. Figure 1The state shown is that the first door leaf 14 and the second door leaf 24 are closed, and the third door leaf 34 is open. When it is necessary to close the third door leaf 34 and open the first door leaf 14 and the second door leaf 24, the first servo motor 42 controls the first connecting rod 43 to rotate clockwise. The first connecting rod 43 drives the first swing plate 44 to rotate. The first swing plate 44 pushes and pulls the first push-pull rod 45 to move. The first push-pull rod 45 controls the rotation of the second swing plate 46 and the second connecting rod 47. Because the first connecting rod 43 is connected to the first rotating rod 13 and the second connecting rod 47 is connected to the second rotating rod 23, the synchronous opening and closing of the first door leaf 14 and the second door leaf 24 can be controlled simultaneously.

[0046] When the first connecting rod 43 rotates, the turntable 524 can rotate synchronously through the action of the second push-pull rod 572 and the fourth swing plate 573, as shown in the reference. Figure 4 and Figure 5 When the turntable 524 rotates, it will drive the fourth rocker arm 525 to rotate. The fourth rocker arm 525 pushes the first movable rod 523 to move. The first movable rod 523 pushes the slide cylinder 522 to slide upward on the fixed rod 521. The slide cylinder 522 will pull the second movable rod 533 to move upward. The second movable rod 533 will pull the gear plate 532 to rotate. When the gear plate 532 rotates, it pushes the rack 534 to move. The rack 534 will press the first spring 536 and push the slider 537 to slide on the stand 51.

[0047] Reference Figure 5 , Figure 6 and Figure 7 When slider 537 moves, it drives the third movable rod 546 to move. The third movable rod 546 pushes the lifting block 544 upward. The lifting block 544 drives the insert rod 545 to the top of the first groove section 5421. At the same time, the first pressure rod 556 moves away from the pressure block 555. After the pressure plate 553 loses pressure, the second spring 554 pushes the pressure plate 553 upward. The pressure plate 553 drives the push block 566 away from the carrier plate 563. The third spring 564 pushes the carrier plate 563 to move. The carrier plate 563 drives the stop block 565 to move into the second slide groove 511 to block slider 537. When the slide plate 535 continues to move, it will press the first spring 536. When the first door leaf 14 and the second door leaf 24 are about to be fully opened, the second pressure rod 557 will move onto the pressure block 555 and press the pressure block 555. The pressure block 555 will drive the pressure plate 553 and the push block 566 to move downwards and press the carrier plate 563. The carrier plate 563 will drive the stop block 565 to leave the second slide groove 511. After the slider 537 is no longer blocked by the stop block 565, the first spring 536 will release the stored force and push the slider 537 to move again, so that the lifting block 544 will move upwards again. The insertion rod 545 will push the guide plate 541 and the third lever 36 to move upwards, so that the third lever 36 will drive the third door leaf 34 to rotate and close the third door leaf 34.

[0048] When it is necessary to open the third door 34 and close the first door 14 and the second door 24, the second pressure rod 557 will move away from the pressure block 555, the pressure plate 553 will move upward again, and the third spring 564 will push the stop block 565 into the second slide groove 511 to block the slider 537. At the same time, the movement of the slider 537 will drive the third movable rod 546 to move. The third movable rod 546 will cause the insertion rod 545 to pull the guide plate 541 and the third lever 36 downward, thereby gradually opening the third door 34. When the slider 537 is blocked by the stop block 565, the third door 34 is in a half-open state. The slide plate 535 will continue to move and stretch the first spring 536 to store force again. When the first door 14 and the second door 24 are about to close, the first pressure rod 556 will press down on the pressure block 555 again, thereby releasing the slider 537. The first spring 536 will pull the slider 537 to fully open the third door 34.

[0049] The implementation principle of this application embodiment is as follows: by setting a first control component 4, using a single first servo motor 42 as a power source, the opening and closing of the first valve 1 and the second valve 2 are synchronously driven through a linkage mechanism, simplifying the control structure of the two valves; the power of the first control component 4 is transmitted to the second control component 5 through a linkage component, and with the help of the linkage and blocking components 55 in the second control component 5, the delayed opening and closing control of the third valve 3 relative to the first and second valves is realized, meeting the precise requirements for valve action timing in industrial pipelines; the entire device realizes centralized linkage control of the three valves through a mechanical structure, eliminating the need for multiple independent actuators, reducing system complexity and manufacturing costs, while improving operational convenience and response speed, and effectively avoiding misoperation and response lag problems in emergency situations.

[0050] 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 three-valve linkage control device for a bypass pipeline, characterized in that: It includes a first valve (1), a second valve (2) and a third valve (3). A first door leaf (14) is movably mounted on the first valve (1), a second door leaf (24) is slidably mounted on the second valve (2), and a third door leaf (34) is movably mounted on the third valve (3). A first control component (4) for controlling the opening and closing of the first door leaf (14) and the second door leaf (24) is connected to the first valve (1) and the second valve (2), and a second control component (5) for controlling the opening and closing of the third door leaf (34) is connected to the first control component (4) and the third valve (3).

2. The bypass pipeline three-valve linkage control device according to claim 1, characterized in that: The first control component (4) includes a mounting plate (41), on which a first servo motor (42) is mounted. The output shaft of the first servo motor (42) is connected to a first connecting rod (43). The first connecting rod (43) is connected to the first door leaf (14). A first swing plate (44) is mounted on the first connecting rod (43). A first push-pull rod (45) is hinged to both ends of the first swing plate (44). The two first push-pull rods (45) are arranged in parallel. A second swing plate (46) is hinged to the first push-pull rod (45). The second swing plate (46) is arranged in parallel with the first swing plate (44). A second connecting rod (47) is mounted on the second swing plate (46). The second connecting rod (47) is connected to the second door leaf (24).

3. The bypass pipeline three-valve linkage control device according to claim 1, characterized in that: The second control component (5) includes a stand (51) connected to the third valve (3). A fixed rod (521) is mounted on the stand (51), and a slide cylinder (522) is slidably mounted on the fixed rod (521). A turntable (524) is rotatably mounted on the stand (51), and a fourth rocker arm (525) is connected to the turntable (524). A first movable rod (523) is hinged to the fourth rocker arm (525), and the first movable rod (523) is hinged to the slide cylinder (522). A base (531) is mounted on the stand (51), and a gear plate (532) is rotatably mounted on the base (531). A second movable rod (533) is hinged to the gear plate (532), and the second movable rod (533) is hinged to the slide cylinder (522). Hinged; a rack (534) is slidably mounted on the base (531), the rack (534) meshes with the gear disc (532), a slide plate (535) is mounted on the rack (534), a second slide groove (511) is provided on the stand (51), the slide plate (535) is slidably connected to the stand (51) through the second slide groove (511), a first spring (536) is connected to the slide plate (535), a slider (537) for controlling the opening and closing of the third door leaf (34) is connected to the end of the first spring (536) away from the slide plate (535), the slider (537) is also slidably mounted on the stand (51) through the second slide groove (511), and a stop component (55) for controlling the movement of the slider (537) is mounted on the stand (51).

4. The bypass pipeline three-valve linkage control device according to claim 3, characterized in that: The third door leaf (34) is connected to a third swing rod (35), and a third lever (36) is hinged to the third swing rod (35); a guide plate (541) is installed on the third lever (36), and a guide groove (542) is provided on the guide plate (541). The guide groove (542) includes a first groove segment (5421) and a second groove segment (5422), and the first groove segment (5421) and the second groove segment (5422) are arranged vertically; the support frame (51) A vertical plate (543) is installed on the vertical plate (543), a lifting block (544) is slidably installed on the vertical plate (543), a plug rod (545) is installed on the lifting block (544), the plug rod (545) extends into the first groove section (5421) and is slidably connected to the guide plate (541), a third movable rod (546) is hinged on the lifting block (544), and the end of the third movable rod (546) away from the lifting block (544) is hinged to the slider (537).

5. A bypass pipeline three-valve linkage control device according to claim 4, characterized in that: The blocking assembly (55) includes a first sliding sleeve (551), which is mounted on the upright (51). A first sliding rod (552) is slidably mounted on the first sliding sleeve (551). A pressure plate (553) is mounted on the first sliding rod (552). A second spring (554) is sleeved on the first sliding rod (552). A pressure block (555) is mounted on the pressure plate (553). A first pressure rod (556) and a second pressure rod (557) are mounted on the sliding plate (535) to press the pressure block (555). The first pressure rod (556) and the second pressure rod (557) are connected to the pressure block (555). Two pressure rods (557) are spaced apart; a second sliding sleeve (561) is installed on the upright frame (51), a second sliding rod (562) is slidably installed on the second sliding sleeve (561), a carrier plate (563) is installed on the second sliding rod (562), a third spring (564) is sleeved on the second sliding rod (562), a push block (566) is installed on the pressure plate (553) to push the carrier plate (563) to move, the push block (566) abuts against the carrier plate (563), and a stop block (565) is installed on the carrier plate (563) to block the movement of the slider (537).

6. The bypass pipeline three-valve linkage control device according to claim 5, characterized in that: The end of the pressure block (555) away from the pressure plate (553) is set as an arc surface, and the side of the push block (566) that abuts against the carrier plate (563) is opened as a beveled surface.

7. A bypass pipeline three-valve linkage control device according to claim 3, characterized in that: The first control component (4) is connected to the turntable (524) via a linkage. The linkage includes a third swing plate (571), which is connected to the first control component (4). The two ends of the third swing plate (571) are hinged with second push-pull rods (572). The two second push-pull rods (572) are arranged in parallel. The ends of the two second push-pull rods (572) away from the third swing plate (571) are hinged with a fourth swing plate (573). The fourth swing plate (573) is arranged in parallel with the third swing plate (571) and is connected to the turntable (524).

8. A bypass pipeline three-valve linkage control device according to claim 3, characterized in that: The slide cylinder (522) has a first slide groove (5221), and a limiting piece (5211) is installed on the fixed rod (521). The limiting piece (5211) extends into the first slide groove (5221) and is slidably connected to the slide cylinder (522).

9. A bypass pipeline three-valve linkage control device according to claim 3, characterized in that: The second groove (511) is an inverted T-shaped groove, the cross-section of the slide plate (535) is an inverted T-shaped, and the slider (537) is also an inverted T-shaped block.

Images