Butterfly valve with operation indication function

Abstract

The invention relates to the technical field of butterfly valves, in particular to a butterfly valve with an operation indication function, which comprises a valve body and a valve rod seat fixedly arranged at the top end of the valve body, a valve plate and an opening and closing piece serving as a valve channel are arranged in the valve body, and a valve rod connected with the valve plate is arranged in the valve rod seat and is used for controlling the valve plate to be rotationally opened and closed. An extending body is fixedly welded to each of the two ends of the valve body, a channel of the valve body is communicated with channels of the extending bodies and serves as a fluid channel, a plurality of flow blocking blades are arranged in the channels of the extending bodies and used for sensing the pressure of fluid, and the flow blocking blades are driven to deflect through the opening and closing process of the valve channels. The faces of the flow blocking blades are used for sensing fluid pressure, the sensed pressure is the opening angle of the valve plate, the effects of accurate control and operation prompting are achieved, and the situation that due to the fact that the opening and closing state of the valve is misjudged and cannot be found in time, the situation that liquid is excessively discharged, and consequently a large amount of leakage and waste are generated is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of butterfly valves, in particular to a butterfly valve with an operation indication function. Background Art

[0002] A butterfly valve is a valve that uses a disc-type opening and closing member to reciprocate about 90° to open, close or adjust the flow of the medium. The butterfly valve is not only simple in structure, small in size, light in weight, economical in material consumption, small in installation size, small in driving torque, easy and quick to operate, but also has good flow regulation function and closing and sealing characteristics. The opening and closing of the butterfly valve can be controlled not only by manually rotating the handwheel to control the valve stem to open and close the valve plate, but also by setting an actuator such as a motor to drive the valve stem to control the opening and closing of the valve plate.

[0003] However, existing butterfly valves often do not have the function of accurately indicating the opening and closing status and opening and closing angles, so that when different operators open and close the butterfly valve, it is impossible to intuitively and accurately judge the actual operating status of the butterfly valve at this time, and it is easy to misjudge the opening and closing status of the valve, resulting in excessive or insufficient liquid discharge or substandard discharge speed. Once the liquid is discharged excessively, a large amount of leakage and waste will occur. Summary of the invention

[0004] Technical Solution To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a butterfly valve with an operation indication function, comprising a valve body and a valve stem seat fixedly arranged at the top end of the valve body, a valve plate is arranged inside the valve body as an opening and closing member of a valve passage, a valve stem connected to the valve plate is arranged inside the valve stem seat for controlling the rotation opening and closing of the valve plate, an extension body is fixedly welded at both ends of the valve body, the extension body comprises a valve extension outer shell and a valve extension inner shell, a sandwich is arranged between the valve extension outer shell and the valve extension inner shell, the passage of the valve body is communicated with the passage of the extension body and serves as a fluid passage; A plurality of flow-blocking blades are arranged in the passage of the extension body for sensing the pressure of the fluid, the plurality of flow-blocking blades are distributed in a circular array and one side of the plurality of flow-blocking blades is attached to the inner wall of the valve extension inner shell, and an adjusting mechanism for driving the plurality of flow-blocking blades to move is arranged in the interlayer; The interlayer is also provided with a prompt system, which includes a pressure sensor installed in the interlayer for sensing the pressure of the liquid on the choke blade, and a controller installed in the valve stem seat and wirelessly connected to the pressure sensor.

[0005] Preferably, the valve stem seat is provided with an active worm wheel fixedly connected to the top end of the valve stem, and the valve stem seat is also provided with an active worm with both ends extending to the outside of the valve stem seat, and the active worm is meshed with the active worm wheel.

[0006] Preferably, the valve stem seat is composed of a top seat and a base connected up and down by bolts, and both side end faces of the top seat and the base are provided with upper and lower recesses corresponding to the transverse penetration of the active worm, and the top of the top seat of the valve stem seat is provided with a chassis communicated with the interior of the valve stem seat, and a drive motor is installed inside the chassis, and the output shaft of the drive motor is downwardly connected to the valve stem, and the drive motor is electrically connected to the controller.

[0007] Preferably, a sealing shell is provided at the outer top end of the valve extension shell of the extension body on both sides, a plug hole is provided on the surface of the sealing shell opposite to the valve stem seat, and a driven worm is provided inside the sealing shell with one end passing through the plug hole and extending to the outside.

[0008] Preferably, the driven worm is connected to one end of the driving worm located outside the valve stem seat via a coupling, and a hand wheel is provided on the driven worm located between the valve stem seat and the sealing shell.

[0009] Preferably, the side wall of the valve extension inner shell is provided with bayonet holes equal in number to the flow-blocking blades, and a sealing block is fixedly arranged in each bayonet hole; The regulating mechanism comprises a short rod which movably penetrates each sealing block and extends into the passage of the extension body, and one end of the short rod is fixedly connected to one side surface of the choke blade.

[0010] Preferably, the other end of each of the short rods is also fixedly connected to a connecting block located in the interlayer, and each connecting block is movably connected to a connecting plate 1 and a connecting plate 2, respectively. Both connecting plate 1 and connecting plate 2 are arc-shaped structures and the curvature is consistent with the curvature of the interlayer.

[0011] Preferably, the other end of the connecting plate 1 located on the connecting block is movably connected to an adjacent connecting block, and the other end of the connecting plate 2 located on the same connecting block is movably connected to another adjacent connecting block.

[0012] Preferably, a rotating rod is fixedly connected to the outer surface of one of the connecting blocks, and the rotating rod movably passes through the valve extension inner shell and the valve extension outer shell and extends to the inside of the sealing shell. The top end of the rotating rod is fixedly connected to a driven worm gear located in the sealing shell, and the driven worm gear is meshed with the driven worm.

[0013] Beneficial Effects Compared with the prior art, the present invention provides a butterfly valve with an operation indication function, which has the following beneficial effects: The opening and closing process of the valve channel simultaneously drives several choke blades to deflect, so that the surfaces of the several choke blades sense the fluid pressure, and the sensed fluid pressure value is transmitted to the operator's display through the pressure sensor. The operator judges the valve opening and closing state and the opening and closing angle according to the displayed value, and then executes the operation of issuing instructions to the drive motor through the controller, thereby achieving the effect of precise control and operation prompts, facilitating the intuitive judgment and operation of different operators, avoiding the misjudgment of the valve opening and closing state and the failure to discover it in time, and avoiding the excessive discharge of liquid resulting in large amounts of leakage and waste.

[0014] A number of throttling blades are arranged to fit the inner wall of the valve extension inner shell. Therefore, whenever the valve extension inner shell rotates at any angle, the inner wall of the valve extension inner shell at that position will be scraped and rubbed. At the same time, the inner wall of the channel of the valve body is scraped and rubbed by the rotation of the valve plate, thereby avoiding the accumulation of dirt on the inner wall of the extension body and the valve body channel, which not only ensures the smooth flow of the channel, but also avoids the corrosion of the valve and leakage caused by the accumulation of dirt, further extending the service life of the butterfly valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the butterfly valve of the present invention; Figure 2 It is a cross-sectional view of a portion of the internal structure of the valve stem seat and the sealing shell of the present invention; Figure 3 It is a partial structural cutaway view of the extended housing of the valve of the present invention; Figure 4 It is a side view of the butterfly valve of the present invention; Figure 5 This is a structural diagram of the connection between the valve extension outer shell and the valve extension inner shell of the present invention; Figure 6 It is a structural diagram of the present invention located in the interlayer of the valve extension outer shell and the valve extension inner shell; Figure 7 This is another external perspective view of the butterfly valve of the present invention.

[0016] Description of reference numerals: 1. Valve body; 11. Valve plate; 2. Valve extension outer shell; 21. Valve extension inner shell; 211. Bayonet; 212. Sealing block; 22. Short rod; 221. Connecting block; 222. Connecting plate 1; 223. Connecting plate 2; 224. Turning rod; 225. Driven worm gear; 23. Thwart vane; 3. Valve stem seat; 31. Valve stem; 32. Active worm gear; 33. Active worm; 4. Sealing shell; 41. Driven worm; 42. Handwheel; 43. Socket; 5. Chassis. DETAILED DESCRIPTION

[0017] The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0018] like Figure 1-7 The figure shows an embodiment of the present invention. To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a butterfly valve with an operation indication function, comprising a valve body 1 and a valve stem seat 3 fixedly arranged at the top of the valve body 1, a valve plate 11 is arranged inside the valve body 1 as an opening and closing member of the valve channel, a valve stem 31 connected to the valve plate 11 is arranged inside the valve stem seat 3 for controlling the rotation opening and closing of the valve plate 11, an extension body is fixedly welded at both ends of the valve body 1, the extension body comprises a valve extension outer shell 2 and a valve extension inner shell 21, an interlayer is arranged between the valve extension outer shell 2 and the valve extension inner shell 21, the channel of the valve body 1 is communicated with the channel of the extension body and serves as a fluid channel, wherein the channel of the valve body 1 has the same diameter as the channel of the extension body; Further, such as Figure 4 As shown, a plurality of flow-blocking blades 23 are arranged in the channel of the extension body for sensing the pressure of the fluid. The plurality of flow-blocking blades 23 are distributed in a circular array and one side thereof is attached to the inner wall of the valve extension inner shell 21. Since each flow-blocking blade 23 is attached to the inner wall of the valve extension inner shell 21, whenever the valve extension inner shell 21 rotates at any angle, the inner wall of the valve extension inner shell 21 at that position will be scraped and rubbed. The inner wall of the channel of the valve body 1 is scraped and rubbed by the rotation of the valve plate 11, thereby preventing the extension body and the inner wall of the valve body channel from accumulating dirt, which not only ensures the smooth flow of the channel, but also prevents the accumulation of dirt from corroding the valve and causing leakage, further extending the service life of the butterfly valve. Further, such as Figure 1 and Figure 2As shown, the valve stem seat 3 is provided with an active worm wheel 32 fixedly connected to the top of the valve stem 31, and the valve stem seat 3 is also provided with an active worm 33 with both ends extending to the outside of the valve stem seat 3. The active worm 33 is meshed with the active worm wheel 32. The valve stem seat 3 is composed of a top seat and a base connected up and down by bolts. The top seat and the two side end surfaces of the base are provided with upper and lower recesses corresponding to the active worm 33 passing through horizontally. When assembling the valve stem seat 3, the active worm 33 is first placed on the top of the base, and the two sides of the active worm 33 are clamped on the base. At the notches at both ends of the valve stem seat 3, the top seat is then buckled with the base, so that the notches of the top seat are also snapped onto the outer surface of the active worm 33. After the valve stem seat 3 is installed, the rotation of the active worm 33 will not be inhibited. The top of the top seat of the valve stem seat 3 is provided with a chassis 5 that is communicated with the inside of the valve stem seat 3. A driving motor is installed inside the chassis 5. The output shaft of the driving motor is downwardly connected to the valve stem 31. The driving motor is electrically connected to the controller. The controller controls the opening and closing of the driving motor. The driving motor drives the valve stem 31 to rotate and controls the valve plate 11 to rotate and open and close. Further, such as Figure 2-4 As shown, a sealing shell 4 is provided at the external top end of the valve extension shell 2 of the extension body on both sides. The sealing shell 4 is hollow inside. A plug hole 43 is provided on the surface of the sealing shell 4 opposite to the valve stem seat 3. A driven worm 41 with one end passing through the plug hole 43 and extending to the outside is provided inside the sealing shell 4. The driven worm 41 is connected to one end of the active worm 33 located outside the valve stem seat 3 through a coupling. The driven worm 41 and the plug hole 43 are on the same central axis. When the driving motor drives the valve stem 31 to rotate, the valve stem 31 drives the active worm wheel 32 to rotate synchronously, and then the active worm wheel 32 drives the active worm 33 to rotate, and the active worm 33 drives the two driven worms 41 connected at both ends to rotate synchronously. A hand wheel 42 is provided on the driven worm 41 located between the valve stem seat 3 and the sealing shell 4. The hand wheel 42 can manually rotate the driven worm 41 and the active worm 33 to achieve the effect of manually controlling the opening and closing of the butterfly valve channel. Further, such as Figure 3 and Figure 6As shown, the side wall of the valve extension inner shell 21 is provided with bayonet holes 211 equal in number to the flow-blocking blades 23, and a sealing block 212 is fixedly arranged in each bayonet hole 211. An adjusting mechanism for driving a plurality of flow-blocking blades 23 to move is arranged in the interlayer, and the adjusting mechanism comprises a short rod 22 movably penetrating each sealing block 212 and extending into the extension body channel, one end of the short rod 22 is fixedly connected to a side surface of the flow-blocking blade 23, and the other end of each short rod 22 is also fixedly connected to a connecting block 221 located in the interlayer, and each connecting block 221 is movably connected with a connecting plate 1 222 and a connecting plate 2 223, respectively, and the connecting plate 1 222 and the connecting plate 2 223 are both arc-shaped structures and the curvature is consistent with the curvature of the interlayer, and the connecting plate 1 222 and the connecting plate 2 223 are mainly used to dynamically connect a plurality of connecting blocks 221 into one, and when any connecting block 221, the connecting plate 1 222 or the connecting plate 2 223 moves, the three as a whole will move, thereby achieving a linkage effect; Further, such as Figure 2 and Figure 6 As shown, the other end of the connecting plate 1 222 located on the connecting block 221 is movably connected to an adjacent connecting block 221, and the other end of the connecting plate 223 located on the same connecting block 221 is movably connected to another adjacent connecting block 221. A rotating rod 224 is fixedly connected to the outer surface of one of the connecting blocks 221. The rotating rod 224 movably penetrates the valve extension inner shell 21 and the valve extension outer shell 2 and extends to the inside of the sealing shell 4. The top of the rotating rod 224 is fixedly connected to a driven worm gear 225 located in the sealing shell 4. The driven worm gear 225 is meshed with the driven worm 41. When the active worm 33 rotates as the valve plate 11 is opened, it drives the driven worm 41 to rotate synchronously. The driven worm 41 drives the driven worm gear 225 to rotate. The driven worm gear 225 rotates by rotating The rod 224 is connected to the outer surface of one of the connecting blocks 221, which will drive one of the connecting blocks 221 to deflect at a certain angle. The deflection of the driven worm gear 225 will drive all the connecting blocks 221 to deflect synchronously at the same angle through a plurality of connected connecting plates 1 222 and 223, so that each connecting block 221 drives the short rod 22 fixedly connected thereto to deflect synchronously, and finally drives each choke blade 23 to deflect in the same direction and at the same angle, so that each choke blade 23 gradually changes from an initial state in which the surface is perpendicular to the central axis of the channel to a state in which the surface is parallel to the central axis of the channel, so that the resistance of the choke blade 23 to the fluid can be reduced from large to small, so as to achieve the effect of sensing the fluid pressure through a plurality of choke blades 23, and then judge the open or closed state of the valve by the fluid pressure; Furthermore, a prompt system is provided in the interlayer, and the prompt system includes a pressure sensor installed in the interlayer for sensing the pressure of the liquid on the choke blade 23. The pressure sensor can transmit the sensed pressure value to the operator's display via wireless. The prompt system also includes a controller installed in the valve stem seat 3 and wirelessly connected to the pressure sensor. Several choke blades 23 transmit the sensed fluid pressure values ​​to the operator's display via the pressure sensor. The operator determines the valve opening and closing state and the opening and closing angle according to the displayed values, and then executes the operation of issuing instructions to the drive motor through the controller to achieve precise control.

[0019] When the above embodiment is working, when the valve channel is in the closed state: the valve plate 11 completely blocks the channel, and at this time, the surface of each choke blade 23 is perpendicular to the central axis of the channel; When the valve channel is opened: the controller sends an opening command to the drive motor, the drive motor drives the valve stem 31 to rotate and controls the valve plate 11 to rotate and open, and the active worm 33 rotates as the valve plate 11 is opened, driving the driven worm 41 to rotate synchronously, and the driven worm 41 drives the driven worm wheel 225 to rotate, and the driven worm wheel 225 is connected to the outer surface of one of the connecting blocks 221 through the rotating rod 224, which will drive one of the connecting blocks 221 to deflect at a certain angle, wherein the deflection of the driven worm wheel 225 will drive all the connecting blocks 221 to deflect synchronously at the same angle through a plurality of connected connecting plates 1 222 and connecting plates 2 223, thereby causing each connecting block 221 to drive the short rod 22 fixedly connected thereto to deflect synchronously, and finally bring Each baffle blade 23 is moved to deflect in the same direction and at the same angle, so that each baffle blade 23 is gradually changed from an initial state in which the surface is perpendicular to the central axis of the channel to a state in which the surface is parallel to the central axis of the channel. In this way, the resistance of the baffle blade 23 to the fluid can be reduced, so as to achieve the effect of sensing the fluid pressure through a plurality of baffle blades 23. The plurality of baffle blades 23 transmit the sensed fluid pressure values ​​to the operator's display through the pressure sensor. The operator determines the valve opening and closing state and the opening and closing angle according to the displayed values, and then executes the operation of issuing instructions to the drive motor through the controller, so as to realize precise control and operation prompts, and avoid the situation in which a large amount of leakage and waste are caused by excessive discharge of liquid due to misjudgment of the valve opening and closing state and failure to discover it in time.

[0020] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A butterfly valve with an operation indication function, comprising a valve body (1) and a valve stem seat (3) fixedly arranged at the top end of the valve body (1), wherein a valve plate (11) is arranged inside the valve body (1) as an opening and closing member of a valve passage, and a valve stem (31) connected to the valve plate (11) is arranged inside the valve stem seat (3) for controlling the rotation opening and closing of the valve plate (11), characterized in that: An extension body is fixedly welded to both ends of the valve body (1), the extension body comprising a valve extension outer shell (2) and a valve extension inner shell (21), an interlayer is provided between the valve extension outer shell (2) and the valve extension inner shell (21), and the channel of the valve body (1) is communicated with the channel of the extension body and serves as a fluid channel; A plurality of flow-blocking blades (23) are arranged in the channel of the extension body for sensing the pressure of the fluid, the plurality of flow-blocking blades (23) are distributed in a circular array and one side of each of the plurality of flow-blocking blades is attached to the inner wall of the valve extension inner shell (21), and an adjustment mechanism for driving the plurality of flow-blocking blades (23) to move is arranged in the interlayer; A prompt system is also provided in the interlayer, the prompt system comprising a pressure sensor installed in the interlayer for sensing the pressure of the liquid on the choke blade (23), and a controller installed in the valve stem seat (3) and wirelessly connected to the pressure sensor.

2. A butterfly valve with operation indication function according to claim 1, characterized in that: The valve stem seat (3) is provided with an active worm wheel (32) fixedly connected to the top end of the valve stem (31) inside, and the valve stem seat (3) is also provided with an active worm (33) with both ends extending to the outside of the valve stem seat (3), and the active worm (33) is meshed with the active worm wheel (32).

3. A butterfly valve with operation indication function according to claim 2, characterized in that: The valve stem seat (3) is composed of a top seat and a base connected up and down by bolts, and both side end surfaces of the top seat and the base are provided with recesses corresponding to the active worm (33) passing through horizontally, and a chassis (5) communicating with the inside of the valve stem seat (3) is arranged at the top of the top seat of the valve stem seat (3), and a drive motor is installed inside the chassis (5), and the output shaft of the drive motor is connected to the valve stem (31) downwardly, and the drive motor is electrically connected to the controller.

4. A butterfly valve with operation indication function according to claim 2, characterized in that: A sealing shell (4) is provided at the external top end of the valve extension housing (2) of the extension body on both sides. A plug hole (43) is provided on the surface of the sealing shell (4) opposite to the valve stem seat (3). A driven worm (41) is provided inside the sealing shell (4) with one end penetrating the plug hole (43) and extending to the outside.

5. A butterfly valve with operation indication function according to claim 4, characterized in that: The driven worm (41) is connected to one end of the driving worm (33) located outside the valve stem seat (3) via a coupling, and a hand wheel (42) is provided on the driven worm (41) located between the valve stem seat (3) and the sealing shell (4).

6. The butterfly valve with operation indication function according to claim 1, characterized in that: The side wall of the valve extension inner shell (21) is provided with a number of bayonet holes (211) equal to the number of flow-blocking blades (23), and a sealing block (212) is fixedly arranged in each bayonet hole (211); The adjustment mechanism comprises a short rod (22) which movably penetrates each sealing block (212) and extends into the extension body channel, and one end of the short rod (22) is fixedly connected to a side surface of the choke blade (23).

7. A butterfly valve with operation indication function according to claim 6, characterized in that: The other end of each short rod (22) is also fixedly connected to a connecting block (221) located in the interlayer, and each connecting block (221) is movably connected to a connecting plate 1 (222) and a connecting plate 2 (223), respectively. The connecting plate 1 (222) and the connecting plate 2 (223) are both arc-shaped structures, and the curvature is consistent with the curvature of the interlayer.

8. The butterfly valve with operation indication function according to claim 7, characterized in that: The other end of the connecting plate 1 (222) located on the connecting block (221) is movably connected to an adjacent connecting block (221), and the other end of the connecting plate 2 (223) located on the same connecting block (221) is movably connected to another adjacent connecting block (221).

9. The butterfly valve with operation indication function according to claim 7, characterized in that: A rotating rod (224) is fixedly connected to the outer surface of one of the connecting blocks (221); the rotating rod (224) movably penetrates the valve extension inner shell (21) and the valve extension outer shell (2) and extends into the interior of the sealing shell (4); a driven worm gear (225) located in the sealing shell (4) is fixedly connected to the top end of the rotating rod (224); the driven worm gear (225) is meshed with the driven worm (41).

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