Pneumatic expansion butterfly valve

Abstract

The utility model discloses a pneumatic expansion butterfly valve which comprises a valve seat, a pneumatic actuator is arranged at the top end of the valve seat, a protective shell is installed between the valve seat and the pneumatic actuator through a bolt, and a valve rod is arranged at the bottom end of the pneumatic actuator. According to the pneumatic expansion butterfly valve, the limiting groove, the limiting rod, the connecting plate, the damper, the spring, the sliding groove and the sliding block are arranged, when the rotating plate rotates to a proper position and then presses the connecting plate, the limiting rod descends when the connecting plate extrudes the damper and the spring, and after the limiting rod descends, the connecting plate is pushed so that the connecting plate can drive the limiting rod to move; when a limiting rod moves to a proper position and then a connecting plate is loosened, a spring enables the limiting rod to be embedded in a limiting groove through elasticity of the spring, so that a rotating plate can be limited and fixed, the rotating shaft can be prevented from driving a first gear to rotate by limiting the rotating plate, and the problem that the rotating plate is not limited and fixed is solved; and the valve rod is easy to drive the valve to rotate accidentally.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly valves, in particular to a pneumatic expansion butterfly valve. Background Art

[0002] Valves can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. Butterfly valve is a regulating valve with a simple structure. Butterfly valve is widely used, and its variety and quantity are still expanding. Users can choose the appropriate butterfly valve according to their own needs.

[0003] There are still some problems with common pneumatic expansion butterfly valves. For example, some expansion butterfly valves are provided with a manual execution structure, but when the manual execution structure is used, the rotating plate is not limited and fixed, and the valve stem can easily cause the valve to rotate unexpectedly, which can easily affect the use of the butterfly valve.

[0004] Therefore, we proposed a new type of pneumatic expansion butterfly valve to improve the above problems. Utility Model Content

[0005] The utility model aims to provide a pneumatic expansion butterfly valve to solve the problem in the background technology that the valve stem is prone to cause the valve to rotate unexpectedly because the rotating plate is not limited and fixed.

[0006] To achieve the above object, the utility model provides the following technical solutions: a pneumatic expansion butterfly valve, comprising a valve seat, a pneumatic actuator is arranged at the top of the valve seat, a protective shell is installed between the valve seat and the pneumatic actuator by bolts, a valve stem is arranged at the bottom end of the pneumatic actuator, a valve plate is arranged at the bottom end of the valve stem, and a limited position fixing structure is arranged on the right side of the top end of the protective shell;

[0007] The limiting and fixing structure includes a connecting plate, a damper and a spring. A slide groove is arranged on the right side of the top of the protective shell, a slider is movably connected inside the slide groove, the top of the slider is fixedly connected with a spring, a damper is arranged inside the spring, the top of the damper and the spring are fixedly connected with a connecting plate, the left side of the top of the connecting plate is fixedly connected with a limiting rod, and a rotating plate is arranged on the top of the limiting rod.

[0008] Preferably, the slider slides left and right inside the slide groove, and the slider and the slide groove cooperate with each other.

[0009] Preferably, a limiting groove is provided at the bottom end of the rotating plate, the limiting grooves are distributed in a circular shape with equal intervals at the bottom end of the rotating plate, and the limiting rods are embedded in the limiting grooves.

[0010] Preferably, the outside of the valve stem is fixedly connected to a second gear, the right side of the inside of the protective shell is movably connected to a rotating shaft, the rotating plate is fixedly connected to the top of the rotating shaft, and the bottom end of the outside of the rotating shaft is fixedly connected to the first gear.

[0011] Preferably, a tooth block is processed on the outside of the second gear, and a tooth block of the same size as that of the outside of the second gear is processed on the outside of the first gear, and the first gear and the second gear cooperate with each other.

[0012] Preferably, a reserved groove is provided inside the valve plate, mounting grooves are provided inside the reserved groove and the valve stem respectively, mounting bolts are provided inside the mounting grooves, a rubber pad is provided at one end outside the mounting bolts, a sealing pad is provided on the outer wall of the valve plate, and the valve plate is fixed to the bottom end outside the valve stem by the mounting grooves and the mounting bolts.

[0013] Preferably, a protective plate is movably hinged on the right side of the front end of the pneumatic actuator, a fixed block is fixedly connected to the right side of the front end of the protective plate, a groove is provided inside the fixed block, a support block is provided on the right side of the protective plate, a hinge block is movably hinged on the front end of the support block, and a protrusion is fixedly connected to the left side of the hinge block.

[0014] Preferably, the convex block is embedded in the inner part of the concave block, and the convex block and the concave block cooperate with each other.

[0015] Compared with the prior art, the utility model has the following beneficial effects: the pneumatic expansion butterfly valve not only facilitates the limit fixing of the rotating plate and the protection of the components on the pneumatic actuator, but also facilitates the replacement of the valve;

[0016] (1) By providing a limit groove, a limit rod, a connecting plate, a damper, a spring, a sliding groove and a sliding block, when the rotating plate rotates to a suitable position, the connecting plate is pressed, and the limit rod descends when the connecting plate squeezes the damper and the spring. After the limit rod descends, it pushes the connecting plate so that the connecting plate drives the limit rod to move. When the limit rod moves to a suitable position, the connecting plate is released, and the spring causes the limit rod to be embedded in the limit groove through its own elasticity, so that the rotating plate can be limited and fixed. The limit of the rotating plate can prevent the rotating shaft from driving the first gear to rotate;

[0017] (2) By providing a protective plate, a fixed block, a protrusion, a hinge block, a groove, a first gear and a second gear, when the pneumatic actuator is damaged, the rotating plate is rotated, and the rotating plate drives the first gear to rotate through the rotating shaft. The rotation of the first gear can drive the valve stem to rotate through the second gear, so that the valve plate can be manually opened. The protective plate can protect the components on the pneumatic actuator to prevent the components from being crushed. When the protective plate needs to be limited, the hinge block is rotated so that the protrusion on one side of the hinge block is stuck in the inside of the groove, so that the protective plate can be limited and fixed;

[0018] (3) By providing a sealing gasket, mounting bolts, reserved grooves, rubber pads and mounting grooves, the valve plate is easily damaged after long-term use. When the valve plate needs to be replaced, the mounting bolts are screwed out of the mounting grooves to make the valve plate lose its fixation, and then the valve seat is removed from the bottom end of the protective shell, so that the valve stem can be taken out from the inside of the valve seat to disassemble the valve plate. When the unused valve plate needs to be installed, the unused valve plate is placed inside the valve seat, and then the valve seat is installed at the bottom end of the protective shell. When installing the valve seat and the protective shell, the valve stem and the reserved groove inside the valve plate are aligned. After installation, the mounting bolts are screwed into the inside of the mounting grooves again to fix the valve plate. The rubber pad not only prevents the mounting bolts from being stuck inside the mounting grooves, but also prevents liquid from entering the inside of the valve plate through the mounting grooves. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view cross-sectional structural schematic diagram of the utility model;

[0020] Figure 2 It is a schematic diagram of the cross-sectional structure of the second gear of the utility model from top view;

[0021] Figure 3 It is a partial side view structural diagram of the valve plate of the utility model;

[0022] Figure 4 For the utility model Figure 1 Schematic diagram of the enlarged cross-section structure at point A in the middle.

[0023] In the figure: 1. valve seat; 2. sealing gasket; 3. valve plate; 4. protective shell; 5. valve stem; 6. pneumatic actuator; 7. protective plate; 8. fixing block; 9. protrusion; 10. hinge block; 11. support block; 12. groove; 13. first gear; 14. second gear; 15. mounting bolt; 16. reserved groove; 17. rubber pad; 18. rotating shaft; 19. mounting groove; 20. limiting groove; 21. rotating plate; 22. limiting rod; 23. connecting plate; 24. damper; 25. spring; 26. slide groove; 27. slider. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Example 1: Please refer to Figure 1-4A pneumatic expansion butterfly valve comprises a valve seat 1, a pneumatic actuator 6 is arranged at the top of the valve seat 1, a protective shell 4 is installed between the valve seat 1 and the pneumatic actuator 6 by bolts, a valve stem 5 is arranged at the bottom end of the pneumatic actuator 6, a valve plate 3 is arranged at the bottom end of the valve stem 5, and a limited position fixing structure is arranged on the right side of the top of the protective shell 4;

[0026] The limiting fixing structure includes a connecting plate 23, a damper 24 and a spring 25. A slide groove 26 is provided on the right side of the top of the protective shell 4. A slider 27 is movably connected inside the slide groove 26. The top of the slider 27 is fixedly connected to the spring 25. The damper 24 is provided inside the spring 25. The tops of the damper 24 and the spring 25 are fixedly connected to the connecting plate 23. The left side of the top of the connecting plate 23 is fixedly connected to the limiting rod 22. The top of the limiting rod 22 is provided with a rotating plate 21.

[0027] The slider 27 slides left and right inside the slide groove 26, and the slider 27 and the slide groove 26 cooperate with each other;

[0028] Specifically, Figure 1 and Figure 4 As shown, when the rotating plate 21 rotates to a suitable position, the connecting plate 23 is pressed. When the connecting plate 23 squeezes the damper 24 and the spring 25, the limiting rod 22 drops. After the limiting rod 22 drops, it pushes the connecting plate 23 so that the connecting plate 23 drives the limiting rod 22 to move. When the limiting rod 22 moves to a suitable position, the connecting plate 23 is released. The spring 25 will use its own elasticity to make the limiting rod 22 embedded in the limiting groove 20, so that the rotating plate 21 can be limited and fixed. Limiting the rotating plate 21 can prevent the rotating shaft 18 from driving the first gear 13 to rotate.

[0029] Embodiment 2: A limiting groove 20 is provided at the bottom end of the rotating plate 21, and the limiting grooves 20 are distributed in a circular shape with equal intervals at the bottom end of the rotating plate 21. The limiting rod 22 is embedded in the limiting groove 20. The outside of the valve stem 5 is fixedly connected with the second gear 14, and the right side of the protective shell 4 is movably connected with the rotating shaft 18. The rotating plate 21 is fixedly connected to the top of the rotating shaft 18, and the bottom end of the outside of the rotating shaft 18 is fixedly connected with the first gear 13. The outside of the second gear 14 is processed with a tooth block, and the outside of the first gear 13 is processed with a tooth block of the same size as the outside of the second gear 14. The first gear 13 and the second gear 14 cooperate with each other. A reserved groove 16 is provided inside the valve plate 3, and mounting grooves 19 are respectively provided inside the reserved groove 16 and the valve stem 5. A mounting bolt 15 is provided inside the mounting groove 19, and a rubber pad 17 is provided at one end of the outside of the mounting bolt 15. A sealing gasket 2 is provided on the outer wall of the valve plate 3, and the valve plate 3 is fixed to the bottom end of the outside of the valve stem 5 through the mounting groove 19 and the mounting bolt 15.

[0030] Specifically, Figure 1 and Figure 2As shown, when the pneumatic actuator 6 is damaged, the rotating plate 21 is rotated, and the rotating plate 21 drives the first gear 13 to rotate through the rotating shaft 18. The rotation of the first gear 13 can drive the valve stem 5 to rotate through the second gear 14, so that the valve plate 3 can be manually opened. The protective plate 7 can protect the components on the pneumatic actuator 6 to prevent the components from being crushed. When the protective plate 7 needs to be limited, the hinge block 10 is rotated so that the protrusion 9 on one side of the hinge block 10 is stuck in the inside of the groove 12, so that the protective plate 7 can be limited and fixed.

[0031] Embodiment 3: A protective plate 7 is movably hinged on the right side of the front end of the pneumatic actuator 6, a fixed block 8 is fixedly connected to the right side of the front end of the protective plate 7, a groove 12 is provided inside the fixed block 8, a support block 11 is provided on the right side of the protective plate 7, a hinge block 10 is movably hinged on the front end of the support block 11, a convex block 9 is fixedly connected to the left side of the hinge block 10, the convex block 9 is embedded in the groove 12, and the convex block 9 and the groove 12 cooperate with each other;

[0032] Specifically, Figure 1 and Figure 3 As shown, the valve plate 3 is easily damaged after long-term use. When the valve plate 3 needs to be replaced, the mounting bolts 15 are screwed out of the mounting grooves 19 to make the valve plate 3 lose its fixation, and then the valve seat 1 is removed from the bottom end of the protective shell 4, so that the valve stem 5 can be taken out from the inside of the valve seat 1 to disassemble the valve plate 3. When the unused valve plate 3 needs to be installed, the unused valve plate 3 is placed inside the valve seat 1, and then the valve seat 1 is installed at the bottom end of the protective shell 4. When installing the valve seat 1 and the protective shell 4, the valve stem 5 is aligned with the reserved groove 16 inside the valve plate 3. After installation, the mounting bolts 15 are screwed into the inside of the mounting grooves 19 again to fix the valve plate 3. The rubber pad 17 not only prevents the mounting bolts 15 from being stuck in the inside of the mounting grooves 19, but also prevents liquid from entering the inside of the valve plate 3 through the mounting grooves 19.

[0033] Working principle: when the pneumatic actuator 6 is damaged during use, the utility model rotates the rotating plate 21, and the rotating plate 21 drives the first gear 13 to rotate through the rotating shaft 18. The rotation of the first gear 13 can drive the valve stem 5 to rotate through the second gear 14, so that the valve plate 3 can be manually opened. When the valve plate 3 needs to be closed, the rotating plate 21 can be rotated again. When the rotating plate 21 is rotated to a suitable position, the connecting plate 23 is pressed. When the connecting plate 23 squeezes the damper 24 and the spring 25, the limit rod 22 drops. After the limit rod 22 drops, the connecting plate 23 is pushed so that the connecting plate 23 drives the limit rod 22 to move. When the limit rod 22 moves to a suitable position, the connecting plate 23 is released, and the spring 25 can make the limit rod 22 embedded in the inside of the limit groove 20 through its own elasticity, so that the rotating plate 21 can be limited and fixed. Limiting the rotating plate 21 can prevent the liquid from rushing open the valve 3, and the protective plate 7 can protect the components on the pneumatic actuator 6 to prevent the components from being damaged. When the protective plate 7 needs to be limited, the hinge block 10 is rotated so that the protrusion 9 on one side of the hinge block 10 is stuck in the inside of the groove 12, so that the protective plate 7 can be limited and fixed. When the valve plate 3 needs to be replaced, the mounting bolts 15 are screwed out of the mounting groove 19 to make the valve plate 3 lose its fixation, and then the valve seat 1 is removed from the bottom end of the protective shell 4, so that the valve stem 5 can be taken out from the inside of the valve seat 1 to disassemble the valve plate 3. When the unused valve plate 3 needs to be installed, the unused valve plate 3 is placed inside the valve seat 1, and then the valve seat 1 is installed at the bottom of the protective shell 4. When installing the valve seat 1 and the protective shell 4, the valve stem 5 is aligned with the reserved groove 16 inside the valve plate 3. After installation, the mounting bolts 15 are screwed into the inside of the mounting groove 19 again to fix the valve plate 3. The rubber pad 17 not only prevents the mounting bolts 15 from being stuck in the inside of the mounting groove 19, but also prevents the liquid from entering the inside of the valve plate 3 through the mounting groove 19.

[0034] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A pneumatic expansion butterfly valve, comprising a valve seat (1), characterized in that: A pneumatic actuator (6) is arranged at the top end of the valve seat (1), a protective shell (4) is installed between the valve seat (1) and the pneumatic actuator (6) by bolts, a valve stem (5) is arranged at the bottom end of the pneumatic actuator (6), a valve plate (3) is arranged at the bottom end outside the valve stem (5), and a limited position fixing structure is arranged on the right side of the top end of the protective shell (4); The limiting fixing structure comprises a connecting plate (23), a damper (24) and a spring (25); a slide groove (26) is arranged on the right side of the top of the protective shell (4); a slider (27) is movably connected inside the slide groove (26); a spring (25) is fixedly connected to the top of the slider (27); a damper (24) is arranged inside the spring (25); the tops of the damper (24) and the spring (25) are fixedly connected to the connecting plate (23); a limiting rod (22) is fixedly connected to the left side of the top of the connecting plate (23); a rotating plate (21) is arranged at the top of the limiting rod (22).

2. A pneumatic expansion butterfly valve according to claim 1, characterized in that: The slider (27) slides left and right inside the slide groove (26), and the slider (27) and the slide groove (26) cooperate with each other.

3. A pneumatic expansion butterfly valve according to claim 1, characterized in that: A limiting groove (20) is provided at the bottom end of the rotating plate (21), and the limiting grooves (20) are distributed in a circular shape at equal intervals at the bottom end of the rotating plate (21), and the limiting rod (22) is embedded in the limiting groove (20).

4. A pneumatic expansion butterfly valve according to claim 1, characterized in that: The outside of the valve stem (5) is fixedly connected to a second gear (14), the right side of the inside of the protective shell (4) is movably connected to a rotating shaft (18), the rotating plate (21) is fixedly connected to the top end of the rotating shaft (18), and the bottom end of the outside of the rotating shaft (18) is fixedly connected to the first gear (13).

5. A pneumatic expansion butterfly valve according to claim 4, characterized in that: The second gear (14) is processed with a tooth block on its exterior, and the first gear (13) is processed with a tooth block of the same size as the exterior of the second gear (14) on its exterior; the first gear (13) and the second gear (14) cooperate with each other.

6. A pneumatic expansion butterfly valve according to claim 1, characterized in that: A reserved groove (16) is provided inside the valve plate (3), and mounting grooves (19) are provided inside the reserved groove (16) and the valve stem (5) respectively. A mounting bolt (15) is provided inside the mounting groove (19), and a rubber pad (17) is provided at one end outside the mounting bolt (15). A sealing pad (2) is provided on the outer wall of the valve plate (3), and the valve plate (3) is fixed to the bottom end outside the valve stem (5) through the mounting groove (19) and the mounting bolt (15).

7. A pneumatic expansion butterfly valve according to claim 1, characterized in that: The right side of the front end of the pneumatic actuator (6) is movably hinged with a protective plate (7), the right side of the front end of the protective plate (7) is fixedly connected with a fixed block (8), a groove (12) is provided inside the fixed block (8), a support block (11) is provided on the right side of the protective plate (7), the front end of the support block (11) is movably hinged with an articulated block (10), and the left side of the articulated block (10) is fixedly connected with a protrusion (9).

8. A pneumatic expansion butterfly valve according to claim 7, characterized in that: The convex block (9) is embedded in the inner part of the concave groove (12), and the convex block (9) and the concave groove (12) cooperate with each other.

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