Double-eccentric hard sealing butterfly valve

Abstract

The utility model relates to the technical field of butterfly valves, and discloses a double-eccentric hard sealing butterfly valve which comprises an outer shell and a protective shell, a motor is fixedly connected to the inner wall of the protective shell, a rotating shaft is fixedly connected to the output end of the motor, an adjusting rod is movably connected to the inner wall of the outer shell, and a fixing sleeve and a limiting rod are fixedly connected to the inner wall of the outer shell. The outer wall of the adjusting rod is fixedly connected with an ejector rod, the inner wall of the fixing sleeve is fixedly connected with a clamping ring, the inner wall of the clamping ring is movably connected with a rotating core, the outer wall of the rotating core is fixedly connected with a functional rod, the outer wall of the functional rod is fixedly connected with a first gear, and a cleaning assembly is arranged at the bottom of a rotating shaft. According to the butterfly valve, the adjusting rod is pressed to drive the clamping block on the ejector rod to extrude the protruding block on the rotating core, the protruding block is clamped with the sliding groove and the clamping groove in the outer wall of the clamping ring in turn through the stress of the spring, the two gears are driven to be meshed and disengaged, and switching of control modes of opening and closing of the butterfly valve is achieved.

Description

Technical Field

[0001] This utility model relates to the field of butterfly valve technology, and in particular to a double eccentric hard-seal butterfly valve. Background Technology

[0002] A butterfly valve is a type of valve that controls the flow of fluid by rotating a valve plate. It features a compact structure and rapid opening and closing. The double eccentric hard-seal butterfly valve, as an important branch, utilizes a design with two eccentric shafts between the valve body and the valve plate. This design allows the valve plate to gradually detach from the sealing surface during opening, reducing friction and wear. It also employs a metal-to-metal hard seal structure, making it suitable for high-temperature, high-pressure, and clean media applications.

[0003] Existing double eccentric hard-seal butterfly valves typically use a manually rotated rocker wheel to drive the internal shaft and valve plate to rotate for opening and closing. However, this is easily caused by accidental contact during operation, which can alter the sealing condition. In the control of some high-pressure and high-flow fluids, the operating torque required to close the valve increases significantly due to the excessive flow rate. In such cases, a motor is needed to control the valve. However, electric valves cannot control the valve body when encountering a power failure. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a double eccentric hard-seal butterfly valve, which aims to improve the problem that the manual crank of the existing butterfly valve is easily accidentally activated, while the electric valve cannot be used when encountering a power failure.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a double eccentric hard-seal butterfly valve, comprising a housing and a protective housing. A motor is fixedly connected to the inner wall of the protective housing, and a rotating shaft is fixedly connected to the output end of the motor. An adjusting rod is movably connected to the inner wall of the housing. A fixed sleeve and a limiting rod are fixedly connected to the inner wall of the housing. A top rod is fixedly connected to the outer wall of the adjusting rod. A retaining ring is fixedly connected to the inner wall of the fixed sleeve. A rotating core is movably connected to the inner wall of the retaining ring. A functional rod is fixedly connected to the outer wall of the rotating core. A gear one is fixedly connected to the outer wall of the functional rod. A spring is provided on the outer wall of the limiting rod. A rotating rod and a synchronizing column are rotatably connected to the inner wall of the housing. A gear two is fixedly connected to the outer wall of the rotating rod. A gear three is fixedly connected to the outer wall of the synchronizing column. Synchronizing wheels are fixedly connected to the outer walls of both the rotating shaft and the synchronizing column. A cleaning component is provided at the bottom of the rotating shaft.

[0006] Preferably, the cleaning component includes a connecting block, which is fixedly connected to the bottom end of the rotating shaft. A valve plate is fixedly connected to the outer wall of the connecting block, and a rotating column is rotatably connected to the outer wall of the valve plate. Multiple scrapers are fixedly connected to the outer wall of the rotating column.

[0007] Preferably, a protective sleeve is fixedly connected to the bottom end of the protective shell, a valve body is fixedly connected to the bottom end of the protective sleeve, the rotating shaft is rotatably connected to the inner wall of the protective sleeve, and the valve plate is slidably connected to the inner wall of the valve body.

[0008] Preferably, the outer wall of the top rod is uniformly fixedly connected with multiple locking blocks, the outer wall of the rotating core is uniformly fixedly connected with multiple protrusions, and the outer wall of the retaining ring is uniformly provided with multiple sliding grooves and retaining slots.

[0009] Preferably, the push rod is movably connected to the inner wall of the fixed sleeve, the push rod is slidably connected to the inner wall of the retaining ring, and the functional rod is movably connected to the outer wall of the limiting rod.

[0010] Preferably, the locking block is slidably connected to the inner wall of the slide groove, the protrusion is slidably connected to the inner walls of the slide groove and the locking groove, and the outer wall of the top rod is evenly provided with a plurality of protrusions, and the outer walls of the protrusions and the protrusions are slidably connected.

[0011] Preferably, the tooth ends of gear one and gear two are slidably connected and can mesh, the tooth ends of gear two and gear three are meshed, and the outer walls of the two synchronous pulleys are fitted with synchronous belts.

[0012] Preferably, the outer wall of the scraper and the outer wall of the valve plate are slidably connected, and the outer wall of the scraper is provided with a scraper blade.

[0013] This utility model has the following beneficial effects:

[0014] 1. In this utility model, pressing the adjusting rod drives the locking block on the top rod to squeeze the protrusion on the rotating core. Through the stress of the spring, the protrusion and the sliding groove and locking groove on the outer wall of the locking ring are engaged alternately, driving the two gears to mesh and disengage, realizing the switching of the control mode for opening and closing the butterfly valve. Even in the event of a power failure, the valve can still be controlled, and the risk of accidental contact with the traditional manual butterfly valve is avoided.

[0015] 2. In this utility model, a rotating column is installed on the water-facing side of the valve plate, and multiple scrapers with scrapers are installed on the outer wall of the rotating column. The water flow impact force is used to scrape the outer wall of the valve plate to remove the attached substances and prevent corrosion of the valve plate. Attached Figure Description

[0016] Figure 1 This is a front view of the double eccentric hard-seal butterfly valve proposed in this utility model;

[0017] Figure 2 This is a cross-sectional view of the double eccentric hard-seal butterfly valve proposed in this utility model.

[0018] Figure 3 This is a schematic diagram of the power switching component structure of the double eccentric hard seal butterfly valve proposed in this utility model;

[0019] Figure 4 This is a cross-sectional view of the power switching component of the double eccentric hard seal butterfly valve proposed in this utility model.

[0020] Figure 5 An exploded view of the power switching component of the double eccentric hard-seal butterfly valve proposed in this utility model;

[0021] Figure 6 for Figure 2 Enlarged view of point A;

[0022] Figure 7 This is an internal sectional view of the valve body of the double eccentric hard-seal butterfly valve proposed in this utility model.

[0023] Legend:

[0024] 1. Outer shell; 2. Protective shell; 3. Protective sleeve; 4. Valve body; 5. Motor; 6. Rotating shaft; 7. Connecting block; 8. Valve plate; 9. Adjusting rod; 10. Fixing sleeve; 11. Top rod; 12. Snap ring; 13. Rotating core; 14. Snap block; 15. Protrusion; 16. Slide groove; 17. Snap groove; 18. Function rod; 19. Gear one; 20. Limiting rod; 21. Spring; 22. Rotating rod; 23. Gear two; 24. Gear three; 25. Synchronizing pulley; 26. Rotating column; 27. Scraper; 28. Synchronizing column. Detailed Implementation

[0025] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] Reference Figure 3 , Figure 4 and Figure 5This utility model provides an embodiment of a double eccentric hard-seal butterfly valve, comprising a housing 1 and a protective housing 2. A motor 5 is fixedly connected to the inner wall of the protective housing 2, and a rotating shaft 6 is fixedly connected to the output end of the motor 5. An adjusting rod 9 is movably connected to the inner wall of the housing 1. A fixing sleeve 10 and a limiting rod 20 are fixedly connected to the inner wall of the housing 1. A top rod 11 is fixedly connected to the outer wall of the adjusting rod 9. A retaining ring 12 is fixedly connected to the inner wall of the fixing sleeve 10. A rotating core 13 is movably connected to the inner wall of the retaining ring 12. A functional rod 18 is fixedly connected to the outer wall of the rotating core 13. A gear 19 is fixedly connected to the outer wall of the functional rod 18. A spring 21 is provided on the outer wall of the limiting rod 20. The inner wall of the outer casing 1 is rotatably connected to a rotating rod 22 and a synchronizing column 28. The outer wall of the rotating rod 22 is fixedly connected to a gear 23, and the outer wall of the synchronizing column 28 is fixedly connected to a gear 3 24. The outer walls of the rotating shaft 6 and the synchronizing column 28 are both fixedly connected to synchronizing pulleys 25. A cleaning component is provided at the bottom of the rotating shaft 6. The top rod 11 is movably connected to the inner wall of the fixed sleeve 10 and slidably connected to the inner wall of the retaining ring 12. The function rod 18 is movably connected to the outer wall of the limiting rod 20. The tooth ends of gear 19 and gear 23 are slidably connected and can mesh. The tooth ends of gear 23 and gear 3 24 are meshed. The outer walls of the two synchronizing pulleys 25 are fitted with synchronizing belts.

[0027] Specifically, in the default state, the sealing butterfly valve uses motor 5 to drive shaft 6 to rotate, thereby using shaft 6 to drive the bottom connecting block 7 and valve plate 8 to rotate for opening and closing. At this time, gear 19 and gear 23 disengage. Although shaft 6 will drive rod 22 to rotate through synchronous wheel 25 when rotating, there are no other contact points, so there will be no motion interference, and it can prevent personnel from accidentally touching the regulating rod 9 and affecting the opening and closing of the valve. When the power is off and motor 5 cannot be used, the adjusting rod 9 can be manually pressed to push the top rod 11 to slide synchronously. The fixing sleeve 10 limits the sliding of the top rod 11. When the adjusting rod 9 and the top rod 11 slide together, the top rod 11 will push the rotating core 13 at its other end to slide synchronously. In the default state, multiple protrusions 15 fixed on the outer wall of the rotating core 13 are located in the groove 17 on the outer wall of the retaining ring 12. When the rotating core 13 is pushed, the protrusions 15 gradually slide along the groove 17. When they slide out, the protrusions 15 continue to slide along the inclined outer wall of the retaining ring 12, driving the rotating core 13 to rotate until it slides into the outer wall of the slide groove 16. When the rotating core 13 is pushed, the rotating core 13... The functional rod 18, which is fixedly connected at the end, will also be driven to slide. The inner wall of the functional rod 18 slides along the limiting rod 20 and gradually squeezes the spring 21. When the protrusion 15 moves from the shallower groove 17 to the deeper slide groove 16, the spring 21 loses its squeezing force and drives the front component to retract through stress, so that the gear 19 on the functional rod 18 retracts to the position of meshing with the gear 23. After that, the subsequent component can be rotated by rotating the adjusting rod 9. The rotational force is transmitted to the rotating rod 22 through the meshing relationship between the gear 19 and the gear 23, and then transmitted to the rotating shaft 6 through the synchronous wheel 25, so that the function of manually opening and closing the valve plate 8 can be realized.

[0028] Reference Figure 2 , Figure 6 and Figure 7 The cleaning component includes a connecting block 7, which is fixedly connected to the bottom end of the rotating shaft 6. A valve plate 8 is fixedly connected to the outer wall of the connecting block 7. A rotating column 26 is rotatably connected to the outer wall of the valve plate 8. Multiple scrapers 27 are fixedly connected to the outer wall of the rotating column 26. The outer walls of the scrapers 27 and the outer walls of the valve plate 8 are slidably connected. A scraper blade is provided on the outer wall of the scraper 27. A protective sleeve 3 is fixedly connected to the bottom end of the protective shell 2. A valve body 4 is fixedly connected to the bottom end of the protective sleeve 3. The rotating shaft 6 is rotatably connected to the inner wall of the protective sleeve 3. The valve plate 8 is slidably connected to the inner wall of the valve body 4.

[0029] Specifically, the protective sleeve 3 protects the rotating shaft 6 from corrosion, and the connecting block 7 connects the rotating shaft 6 and the valve plate 8. When the rotating shaft 6 is rotated, the valve plate 8 can be rotated synchronously to complete the opening, closing and adjustment of the valve. When water flows through, the impact force will hit the scraper 27, causing it to rotate around the rotating column 26, and then contact the outer wall of the valve plate 8. The scraper cleans the deposits on the outer wall, achieving an automatic cleaning effect. The outer circumference of the valve plate 8 is equipped with a metal sealing gasket, which fits against the inner wall of the valve body 4 during rotation to achieve a hard seal of the valve.

[0030] Reference Figure 5 Multiple locking blocks 14 are evenly fixedly connected to the outer wall of the push rod 11, multiple protrusions 15 are evenly fixedly connected to the outer wall of the rotating core 13, multiple sliding grooves 16 and slots 17 are evenly opened on the outer wall of the retaining ring 12, the locking blocks 14 are slidably connected to the inner wall of the sliding groove 16, the protrusions 15 are slidably connected to the inner walls of the sliding groove 16 and slots 17, and multiple protrusions are evenly arranged on the outer wall of the push rod 11, with the protrusions 15 and the outer walls of the protrusions slidably connected.

[0031] Specifically, the locking block 14 is always slidably connected inside the slide groove 16 to prevent the push rod 11 from rotating, so that the push rod 11 can only slide. When the butterfly valve has been switched to manual control, if it is to be switched to electric control, when the adjusting rod 9 is pressed, the adjusting rod 9 squeezes the push rod 11. Then the protrusion at the top of the push rod 11 will press against the protrusion 15 inside the slide groove 16, thereby driving the protrusion 15 to slide synchronously. The protrusion 15 slides along the slide groove 16. When the protrusion 15 slides out of the slide groove 16, it will continue to slide along the inclined outer wall of the retaining ring 12 into the retaining groove 17. Since the slide groove 16 is deeper and the retaining groove 17 is shallower, the sliding distance of the rotating core 13 is changed, and the travel distance of the function rod 18 driven by the rear end of the rotating core 13 is also changed, causing the gear 19 and gear 23 to disengage. At this time, the rotating adjusting rod 9 can no longer control the rotation of the subsequent components, and thus loses the ability to manually control. After that, the motor 5 can be used to drive the valve plate 8 for control.

[0032] Working principle: When using this double eccentric hard seal butterfly valve, under normal conditions, the opening and closing of the valve plate 8 is controlled by the motor 5. The motor 5 starts and drives the rotating shaft 6 to rotate. The rotating shaft 6 drives the valve plate 8 to rotate around the axis through the fixed connecting block 7 to open and close. When the liquid in the pipe passes through the valve plate 8, it impacts the scraper 27, causing multiple scrapers 27 to rotate around the rotating column 26, which scrapes the surface of the valve plate 8 to remove the adhering substances on its surface, achieving the effect of automatic cleaning and preventing long-term adhesion from corroding the valve plate 8.

[0033] When the power fails and the motor 5 cannot be started, the adjusting rod 9, which is movably connected to the outer casing 1, needs to be manually pressed inward. The adjusting rod 9 will drive the top rod 11, which is fixedly connected to it, to slide along the inner wall of the fixed sleeve 10. The top rod 11 will then push the rotating core 13 to slide synchronously. At this time, the multiple protrusions 15 connected to the outer wall of the rotating core 13 will slide along the groove 17 on the outer wall of the retaining ring 12. During the sliding process, the functional rod 18 will squeeze the spring 21. When the protrusions 15 slide out of the groove 17, they will continue to slide along the inclined outer wall of the rotating core 13 until they slide down to the outer wall of the slide groove 16. At this time, the adjusting rod 9 is released. Under the stress of the spring 21, all devices are pushed back, and the protrusions 15 are engaged in the inner wall of the slide groove 16. During the retraction process, the gear sleeved on the functional rod 18... Gear 19 will be driven to slide synchronously back to the position where it meshes with gear 23. At this time, the adjusting rod 9, the push rod 11, the rotating core 13, and the function rod 18 can rotate together due to the engagement. Then, the hand crank on the outer wall of the adjusting rod 9 can be rotated, thereby driving the push rod 11, the rotating core 13, and the function rod 18 to rotate synchronously, which in turn drives gear 19 to rotate. Through the meshing of the tooth walls, gear 23 is driven to rotate, which in turn drives the synchronous column 28 to rotate. The power is transmitted to the rotating shaft 6 through the synchronous wheel 25, thereby realizing the manual opening and closing of the valve plate 8. When the power is restored, the adjusting rod 9 is pressed again, and the locking block 14 pushes the protrusion 15 to slide out of the slide groove 16, re-enter the locking groove 17 and engage. Gear 19 and gear 23 disengage and return to the default state.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A double eccentric hard-seal butterfly valve, comprising a housing (1) and a protective housing (2), characterized in that: A motor (5) is fixedly connected to the inner wall of the protective shell (2), and a rotating shaft (6) is fixedly connected to the output end of the motor (5). An adjusting rod (9) is movably connected to the inner wall of the outer shell (1). A fixing sleeve (10) and a limiting rod (20) are fixedly connected to the inner wall of the outer shell (1). A top rod (11) is fixedly connected to the outer wall of the adjusting rod (9). A retaining ring (12) is fixedly connected to the inner wall of the fixing sleeve (10). A rotating core (13) is movably connected to the inner wall of the retaining ring (12). A rotating core (13) is fixedly connected to the outer wall of the rotating core (13). Function rod (18), gear one (19) is fixedly connected to the outer wall of the function rod (18), spring (21) is provided on the outer wall of the limiting rod (20), rotating rod (22) and synchronous column (28) are rotatably connected to the inner wall of the outer shell (1), gear two (23) is fixedly connected to the outer wall of the rotating rod (22), gear three (24) is fixedly connected to the outer wall of the synchronous column (28), synchronous wheel (25) is fixedly connected to the outer walls of the rotating shaft (6) and the synchronous column (28), and a cleaning component is provided at the bottom of the rotating shaft (6).

2. The double eccentric hard-seal butterfly valve according to claim 1, characterized in that: The cleaning component includes a connecting block (7), which is fixedly connected to the bottom end of the rotating shaft (6). A valve plate (8) is fixedly connected to the outer wall of the connecting block (7). A rotating column (26) is rotatably connected to the outer wall of the valve plate (8). A plurality of scrapers (27) are fixedly connected to the outer wall of the rotating column (26).

3. The double eccentric hard-seal butterfly valve according to claim 2, characterized in that: The bottom end of the protective shell (2) is fixedly connected to a protective sleeve (3), the bottom end of the protective sleeve (3) is fixedly connected to a valve body (4), the rotating shaft (6) is rotatably connected to the inner wall of the protective sleeve (3), and the valve plate (8) is slidably connected to the inner wall of the valve body (4).

4. The double eccentric hard-seal butterfly valve according to claim 1, characterized in that: The outer wall of the top rod (11) is uniformly fixedly connected with multiple locking blocks (14), the outer wall of the rotating core (13) is uniformly fixedly connected with multiple protrusions (15), and the outer wall of the retaining ring (12) is uniformly provided with multiple sliding grooves (16) and retaining slots (17).

5. The double eccentric hard-seal butterfly valve according to claim 1, characterized in that: The top rod (11) is movably connected to the inner wall of the fixed sleeve (10), the top rod (11) is slidably connected to the inner wall of the retaining ring (12), and the functional rod (18) is movably connected to the outer wall of the limiting rod (20).

6. The double eccentric hard-seal butterfly valve according to claim 4, characterized in that: The card block (14) is slidably connected to the inner wall of the slide groove (16), the protrusion (15) is slidably connected to the inner walls of the slide groove (16) and the card slot (17), and the outer wall of the top rod (11) is evenly provided with a plurality of protrusions, and the outer walls of the protrusions (15) and the protrusions are slidably connected.

7. The double eccentric hard-seal butterfly valve according to claim 1, characterized in that: The tooth ends of gear one (19) and gear two (23) are slidably connected and can mesh, the tooth ends of gear two (23) and gear three (24) are meshed, and the outer walls of the two synchronous pulleys (25) are fitted with synchronous belts.

8. The double eccentric hard-seal butterfly valve according to claim 2, characterized in that: The outer wall of the scraper (27) and the outer wall of the valve plate (8) are slidably connected, and the outer wall of the scraper (27) is provided with a scraper blade.

Images