Double-flange butterfly valve

Abstract

The utility model relates to a double-flange butterfly valve, which belongs to the technical field of flange butterfly valves and comprises a double-flange butterfly valve body, a valve rod is rotatably connected inside the double-flange butterfly valve body through a sealing bearing, a valve plate is arranged at the bottom end of the valve rod, and a rubber sealing ring is arranged on the outer side of the valve plate. According to the double-flange butterfly valve, when the opening and closing mechanism is arranged to open and close the double-flange butterfly valve body, the double-flange butterfly valve body needs to be operated through two hands, a first rotating handle is pulled, then a second handle is rotated, opening and closing of the double-flange butterfly valve are achieved, and therefore the opening and closing difficulty of the double-flange butterfly valve can be improved; according to the double-flange butterfly valve, the butterfly valve is not prone to being opened and closed by strangers, a certain anti-misoperation effect can be achieved, meanwhile, the left side of the inserting rod can be inserted into the corresponding inserting groove in a sliding mode, limiting and fixing of the valve plate can be achieved, the valve plate is prevented from rotating in the double-flange butterfly valve body, and the closing stability of the double-flange butterfly valve body can be improved.

Description

Technical Field

[0001] This utility model relates to the field of flange butterfly valve technology, specifically a double flange butterfly valve. Background Technology

[0002] Currently, butterfly valves, also known as flap valves, are a type of simple regulating valve that can be used for on / off control of low-pressure pipeline media. A butterfly valve is a valve in which the closing element, the valve disc or butterfly plate, is a disc that rotates around the valve shaft to achieve opening and closing. Butterfly valves are not only simple in structure, small in size, light in weight, economical in material consumption, small in installation size, low in driving torque, easy and quick to operate, but also have good flow regulation function and sealing characteristics.

[0003] For example, Chinese patent CN217207961U discloses a double-flange butterfly valve, including a butterfly valve body. First flanges are fixed to the openings at both ends of the butterfly valve body, and a second flange is inserted into the outer side of each first flange. The outer side of the second flange can connect to an external pipeline. The first flange includes a first disc and a retaining ring disposed on one side of the first disc. The retaining ring is arranged circumferentially outward along the first through hole in the middle of the first disc. The second flange includes a second disc, and a U-shaped retaining groove with an outward opening is provided on one side of the second disc corresponding to the retaining ring. A sealing ring is provided circumferentially outward on the inner wall of the retaining groove at the second through hole in the middle of the second disc. The first flange is engaged with the retaining ring through the engagement of the retaining ring and the retaining groove, and the sealing surface on the outer side of the retaining ring is pressed tightly against the sealing ring. The advantages of this utility model are: it facilitates the disassembly and assembly of the butterfly valve body and the external pipeline, allowing the butterfly valve body to be directly removed from between the two second flanges without having to disassemble the bolts used to connect the first flanges to the external pipeline one by one.

[0004] Although the aforementioned patent allows the butterfly valve body to be removed directly between the two second flanges without having to disassemble the bolts used to connect the first flange to the external pipeline, the double-flanged butterfly valve in this patent is easily operated by outsiders during use, opening and closing the double-flanged butterfly valve without preventing misoperation, thus reducing its practicality. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a double-flanged butterfly valve, which has the advantages of increasing the difficulty of opening and closing the butterfly valve and making it difficult for outsiders to open and close it. This solves the problem that double-flanged butterfly valves are easily operated by outsiders during use, and the valve cannot be opened and closed by outsiders, thus failing to prevent misoperation and reducing its practicality.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a double-flanged butterfly valve, comprising a double-flanged butterfly valve body, a valve stem rotatably connected inside the double-flanged butterfly valve body via a sealed bearing, a valve plate provided at the bottom end of the valve stem, a rubber sealing ring provided on the outer side of the valve plate, the valve plate being located inside the double-flanged butterfly valve body, the rubber sealing ring fitting with the gap of the double-flanged butterfly valve body, a cavity shell provided on the upper surface of the double-flanged butterfly valve body, the top end of the valve stem rotatably penetrating the double-flanged butterfly valve body and extending into the cavity shell, and an opening and closing mechanism provided on the right side of the cavity shell;

[0007] The opening and closing mechanism includes a fixed shell, at least two insertion slots, an insertion rod, two spring telescopic rods, a movable plate, a first rotating handle, and a connecting assembly. The fixed shell is fixed to the right side of the cavity shell by bolts. The at least two insertion slots are all opened on the outer side of the valve stem tip. The left side of the insertion rod is slidably inserted into the inside of the right insertion slot. The two spring telescopic rods are arranged on the upper and lower sides of the right side wall of the fixed shell cavity. The movable plate is arranged on the left side of the upper and lower spring telescopic rods. The insertion rod is fixed inside the movable plate. The first rotating handle is arranged on the right side of the insertion rod. The insertion rod is slidably connected inside the fixed shell.

[0008] The connecting assembly includes a first sliding hole, a second sliding hole, a first bevel gear, a second bevel gear, a drive rod, and a second handle. The first sliding hole is opened through the right side of the cavity shell, and the plug rod is slidably connected inside the first sliding hole with a clearance fit. The second sliding hole is opened through the right side of the fixed shell, and the plug rod is slidably connected inside the second sliding hole with a clearance fit. The first bevel gear is located on the outer side of the valve stem tip, and the second bevel gear meshes with the outer side of the first bevel gear. The drive rod is located inside the second bevel gear.

[0009] By adopting this technical solution, the difficulty of opening and closing the butterfly valve can be increased, making it less likely for outsiders to open or close the butterfly valve.

[0010] Furthermore, the drive rod is rotatably connected to the left side wall of the cavity via a sealed bearing, and the left side rotates through the cavity and extends to the left side, with the second handle located on the left side of the drive rod.

[0011] By adopting this technical solution, the drive rod can be rotated by turning the second handle.

[0012] Furthermore, at least two of the aforementioned insertion slots are evenly distributed on the outer side of the valve stem.

[0013] By adopting this technical solution, the stability of the valve plate inside the double-flanged butterfly valve body can be improved.

[0014] Furthermore, the spring telescopic rod includes a first movable rod, a second movable rod is slidably connected inside the first movable rod, and a spring is movably fitted on the outer side of the first movable rod.

[0015] By adopting this technical solution, the stress of the upper and lower spring telescopic rods can drive the left side of the plug rod to slide into the corresponding plug slot.

[0016] Furthermore, the movable plate and the fixed shell are fitted together with a gap, and the left side of the movable plate is attached to the right side of the cavity shell.

[0017] By adopting this technical solution, the movable plate can move inside the fixed shell, improving the stability of the left and right movement of the plug rod.

[0018] Furthermore, a supporting U-shaped frame is provided on the left side of the cavity shell, and the drive rod is rotatably connected to the inside of the supporting U-shaped frame through a bearing.

[0019] By adopting this technical solution, the stability of the drive rod rotation can be improved by supporting the U-shaped frame.

[0020] Furthermore, an anti-slip layer, which is a rubber layer, is provided on the outer side of the first rotating handle.

[0021] By adopting this technical solution, the anti-slip performance of the outer side of the first rotating handle is improved.

[0022] Furthermore, a baffle is provided on the right side wall of the inner cavity of the double-flange butterfly valve body, and the baffles are all located on the front of the valve plate and the rubber sealing ring.

[0023] By adopting this technical solution, one side of the valve plate can be blocked by a baffle, which facilitates the limiting of the valve plate after the butterfly valve is opened.

[0024] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0025] This double-flanged butterfly valve requires two hands to operate during opening and closing. The first handle is pulled, and then the second handle is rotated to open and close the valve. This increases the difficulty of opening and closing the valve, making it less likely for unauthorized personnel to operate and preventing accidental operation. Additionally, the left side of the plug rod can slide into the corresponding plug groove, limiting and fixing the valve plate to prevent rotation within the valve body and improving the stability of the valve when closed. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of this utility model;

[0027] Figure 2 This is a schematic diagram of the opening and closing mechanism of this utility model;

[0028] Figure 3 This is a schematic diagram of the connection structure between the plug rod and the movable plate of this utility model.

[0029] In the diagram: 1. Double-flanged butterfly valve body; 2. Valve stem; 3. Valve plate; 4. Rubber sealing ring; 5. Cavity shell; 6. Opening and closing mechanism; 61. Fixed shell; 62. Insertion groove; 63. Insertion rod; 64. Spring telescopic rod; 65. Moving plate; 66. First rotating handle; 671. First sliding hole; 672. Second sliding hole; 673. First bevel gear; 674. Second bevel gear; 675. Drive rod; 676. Second handle; 7. Baffle plate. Detailed Implementation

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] Please see Figure 1 This embodiment of a double-flanged butterfly valve includes a double-flanged butterfly valve body 1. A valve stem 2 is rotatably connected inside the double-flanged butterfly valve body 1 via a sealed bearing. A valve plate 3 is provided at the bottom end of the valve stem 2. A rubber sealing ring 4 is provided on the outer side of the valve plate 3. The valve plate 3 is located inside the double-flanged butterfly valve body 1. The rubber sealing ring 4 is fitted with the gap of the double-flanged butterfly valve body 1. A cavity shell 5 is provided on the upper surface of the double-flanged butterfly valve body 1. The top end of the valve stem 2 rotatably passes through the double-flanged butterfly valve body 1 and extends into the cavity shell 5. An opening and closing mechanism 6 is provided on the right side of the cavity shell 5. The opening and closing mechanism 6 can increase the difficulty of opening and closing the butterfly valve, making it difficult for outsiders to open and close the butterfly valve.

[0032] In this embodiment, the double-flanged butterfly valve body 1, valve stem 2, valve plate 3, and rubber sealing ring 4 are all existing technologies. Flanges are provided on both the front and back sides of the double-flanged butterfly valve body 1.

[0033] Please see Figures 2 to 3To increase the difficulty of opening and closing the butterfly valve and prevent unauthorized personnel from opening and closing it, the opening and closing mechanism 6 in this embodiment includes a fixed shell 61, at least two insertion slots 62, an insertion rod 63, two spring telescopic rods 64, a moving plate 65, a first rotating handle 66, and a connecting assembly. The fixed shell 61 is fixed to the right side of the cavity shell 5 by bolts. At least two insertion slots 62 are all opened on the outer side of the top of the valve stem 2. The left side of the insertion rod 63 is slidably inserted into the inside of the right insertion slot 62. The two spring telescopic rods 64 are both arranged on the upper and lower sides of the right side wall of the inner cavity of the fixed shell 61. The moving plate 65 is arranged on the left side of the upper and lower spring telescopic rods 64. The insertion rod 63 is fixed inside the moving plate 65. The first rotating handle 66 is arranged on the right side of the insertion rod 63. The insertion rod 63 is slidably connected inside the fixed shell 61.

[0034] In this embodiment, the connecting assembly includes a first sliding hole 671, a second sliding hole 672, a first bevel gear 673, a second bevel gear 674, a drive rod 675, and a second handle 676. The first sliding hole 671 is opened through the right side of the cavity shell 5, and the plug rod 63 is slidably connected inside the first sliding hole 671 with a gap fit. The second sliding hole 672 is opened through the right side of the fixed shell 61, and the plug rod 63 is slidably connected inside the second sliding hole 672 with a gap fit.

[0035] In this embodiment, the opening and closing mechanism 6 is set to operate the double flange butterfly valve body 1 with both hands. The first rotating handle 66 is pulled and the second handle 676 is rotated to open and close the double flange butterfly valve. This increases the difficulty of opening and closing the double flange butterfly valve, making it less likely for outsiders to open and close the butterfly valve, and can play a certain role in preventing misoperation.

[0036] In this embodiment, the first bevel gear 673 is disposed on the outer side of the top of the valve stem 2, the second bevel gear 674 meshes with the outer side of the first bevel gear 673, the drive rod 675 is disposed inside the second bevel gear 674, the drive rod 675 is rotatably connected to the left side wall of the cavity 5 through a sealed bearing, and the left side rotates through the cavity 5 and extends to the left side, the second handle 676 is disposed on the left side of the drive rod 675, and at least two insertion slots 62 are evenly distributed on the outer side of the valve stem 2.

[0037] In this embodiment, when the double-flanged butterfly valve is opened, the first rotating handle 66 can be pulled to the right with one hand, compressing the upper and lower spring telescopic rods 64. The moving plate 65 moves to the right inside the fixed shell 61, causing the plug rod 63 to move to the right inside both the first sliding hole 671 and the second sliding hole 672. The left side of the plug rod 63 moves out of the right plug groove 62. Then, the second handle 676 is rotated with the other hand. Through the interaction of the drive rod 675, the second bevel gear 674, the first bevel gear 673 and the valve stem 2, the valve plate 3 is rotated inside the double-flanged butterfly valve body 1, and then the double-flanged butterfly valve is opened.

[0038] In this embodiment, the spring telescopic rod 64 includes a first movable rod, a second movable rod is slidably connected inside the first movable rod, a spring is movably fitted on the outer side of the first movable rod, the movable plate 65 is fitted with the gap between the fixed shell 61, the left side of the movable plate 65 is in contact with the right side of the cavity shell 5, a supporting U-shaped frame is provided on the left side of the cavity shell 5, the drive rod 675 is rotatably connected to the inside of the supporting U-shaped frame through a bearing, an anti-slip layer is provided on the outer side of the first rotating handle 66, the anti-slip layer is a rubber layer, a baffle 7 is provided on the right side wall of the inner cavity of the double flange butterfly valve body 1, the baffle 7 is located on the front of the valve plate 3 and the rubber sealing ring 4 and is in contact with each other.

[0039] It should be noted that after opening, the first rotating handle 66 on the right side can be released, and the upper and lower spring telescopic rods 64 can be reset, which can drive the left side of the plug rod 63 to slide into the corresponding plug groove 62, thereby limiting and fixing the valve plate 3 and improving the stability of the valve plate 3 inside the double flange butterfly valve body 1. After the double flange butterfly valve body 1 is closed, the left side of the plug rod 63 can slide into the corresponding plug groove 62 to limit and fix the valve plate 3, preventing the valve plate 3 from rotating in the double flange butterfly valve body 1, and improving the stability of the double flange butterfly valve body 1 when closed.

[0040] The working principle of the above embodiment is:

[0041] When opening the double-flanged butterfly valve, the first rotating handle 66 can be pulled to the right with one hand, compressing the upper and lower spring telescopic rods 64. The moving plate 65 moves to the right inside the fixed housing 61, causing the insertion rod 63 to move to the right inside both the first sliding hole 671 and the second sliding hole 672. The left side of the insertion rod 63 moves out of the right insertion slot 62. Then, the second handle 676 can be rotated with the other hand. Through the interaction of the drive rod 675, the second bevel gear 674, the first bevel gear 673, and the valve stem 2, the valve plate 3 moves inside the double-flanged butterfly valve body 1. The valve is rotated, and then the double-flanged butterfly valve is opened. After opening, the first rotating handle 66 on the right side can be released, and the upper and lower spring telescopic rods 64 are reset. This allows the left side of the plug rod 63 to slide and insert into the corresponding plug groove 62, thereby limiting and fixing the valve plate 3 and improving the stability of the valve plate 3 inside the double-flanged butterfly valve body 1. After the double-flanged butterfly valve body 1 is closed, the left side of the plug rod 63 can slide and insert into the corresponding plug groove 62 to limit and fix the valve plate 3, preventing the valve plate 3 from rotating in the double-flanged butterfly valve body 1 and improving the stability of the double-flanged butterfly valve body 1 when closed.

Claims

1. A double-flanged butterfly valve, comprising a double-flanged butterfly valve body (1), characterized in that: The double-flanged butterfly valve body (1) is rotatably connected to a valve stem (2) via a sealed bearing. A valve plate (3) is provided at the bottom end of the valve stem (2). A rubber sealing ring (4) is provided on the outer side of the valve plate (3). The valve plate (3) is located inside the double-flanged butterfly valve body (1). The rubber sealing ring (4) is fitted with the gap of the double-flanged butterfly valve body (1). A cavity shell (5) is provided on the upper surface of the double-flanged butterfly valve body (1). The top end of the valve stem (2) rotates through the double-flanged butterfly valve body (1) and extends into the cavity shell (5). An opening and closing mechanism (6) is provided on the right side of the cavity shell (5). The opening and closing mechanism (6) includes a fixed shell (61), at least two insertion slots (62), insertion rods (63), two spring telescopic rods (64), a moving plate (65), a first rotating handle (66), and a connecting assembly. The fixed shell (61) is fixed to the right side of the cavity shell (5) by bolts. At least two insertion slots (62) are opened on the outer side of the top of the valve stem (2). The left side of the insertion rod (63) is slidably inserted into the inside of the right insertion slot (62). The two spring telescopic rods (64) are set on the upper and lower sides of the right side wall of the inner cavity of the fixed shell (61). The moving plate (65) is set on the left side of the upper and lower spring telescopic rods (64). The insertion rod (63) is fixed inside the moving plate (65). The first rotating handle (66) is set on the right side of the insertion rod (63). The insertion rod (63) is slidably connected inside the fixed shell (61). The connecting assembly includes a first sliding hole (671), a second sliding hole (672), a first bevel gear (673), a second bevel gear (674), a drive rod (675), and a second handle (676). The first sliding hole (671) is opened through the right side of the cavity shell (5). The plug rod (63) is slidably connected to the inside of the first sliding hole (671) with a clearance fit. The second sliding hole (672) is opened through the right side of the fixed shell (61). The plug rod (63) is slidably connected to the inside of the second sliding hole (672) with a clearance fit. The first bevel gear (673) is located on the outside of the top of the valve stem (2). The second bevel gear (674) meshes with the outside of the first bevel gear (673). The drive rod (675) is located inside the second bevel gear (674).

2. The double-flanged butterfly valve according to claim 1, characterized in that: The drive rod (675) is rotatably connected to the left side wall of the cavity (5) via a sealed bearing, and the left side rotates through the cavity (5) and extends to the left side. The second handle (676) is located on the left side of the drive rod (675).

3. A double-flanged butterfly valve according to claim 1, characterized in that: No fewer than two of the insertion slots (62) are evenly distributed on the outside of the valve stem (2).

4. A double-flanged butterfly valve according to claim 1, characterized in that: The spring telescopic rod (64) includes a first movable rod, a second movable rod is slidably connected inside the first movable rod, and a spring is movably fitted on the outside of the first movable rod.

5. A double-flanged butterfly valve according to claim 1, characterized in that: The movable plate (65) is fitted with the fixed shell (61) with a gap, and the left side of the movable plate (65) is attached to the right side of the cavity shell (5).

6. A double-flanged butterfly valve according to claim 1, characterized in that: A supporting U-shaped frame is provided on the left side of the cavity shell (5), and the drive rod (675) is rotatably connected to the inside of the supporting U-shaped frame through a bearing.

7. A double-flanged butterfly valve according to claim 1, characterized in that: The outer side of the first rotating handle (66) is provided with an anti-slip layer, which is a rubber layer.

8. A double-flanged butterfly valve according to claim 1, characterized in that: The right side wall of the inner cavity of the double flange butterfly valve body (1) is provided with baffles (7), and the baffles (7) are all located on the front of the valve plate (3) and the rubber sealing ring (4).

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