Hydrodynamic triple offset butterfly valve

Abstract

The utility model discloses a kind of liquid-driven three-eccentric butterfly valves, including valve body, valve plate, valve rod main shaft, valve seat, valve plate is connected with the valve port of valve body, valve rod main shaft is connected with valve plate, valve seat is set in the valve port circumferential side of valve body;The top of the valve body is provided with pressure lan, and the drive mechanism for driving valve rod main shaft rotation is installed on pressure lan;Indicating table for showing angle is provided on the drive mechanism, and pointer for indicating angle is installed on the top of valve rod main shaft;The utility model is in cooperation with the pointer of indicating table and the coaxial setting of valve rod main shaft, the rotation angle of valve rod main shaft and valve plate is shown in real time, the flow of the present time is accurately obtained by directly reading angle value and calculating according to valve flow characteristic curve, the accurate adjustment of butterfly valve flow is realized, and valve rod main shaft is rotated by hydraulic cylinder and crank drive, drive mechanism structure is simple, easy to maintain, solve the problem that transmission drive mechanism transmission chain is long, efficiency loss, maintenance is complex.

Description

Technical Field

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

[0002] A butterfly valve is called a triple-eccentric butterfly valve, where the valve stem axis is offset from both the disc center and the body center, and the valve seat rotation axis is at a certain angle to the valve body channel axis. Currently, the rotation angle of the valve stem main shaft cannot be directly observed in triple-eccentric butterfly valves, resulting in the inability to accurately control the flow rate of the butterfly valve. Moreover, the drive mechanism of existing electric butterfly valves may be relatively complex, often using multi-stage gear transmission or worm gear transmission structures, which have problems such as long transmission chains, efficiency loss, and complex maintenance. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a hydraulic triple eccentric butterfly valve with a simple drive structure, which can also measure the rotation angle of the valve stem shaft in order to accurately control the flow of the butterfly valve.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows.

[0005] The hydraulic triple eccentric butterfly valve includes a valve body, a valve plate, a valve stem spindle, and a valve seat. The valve plate is connected to the valve port of the valve body, the valve stem spindle is connected to the valve plate, and the valve seat is located around the valve port of the valve body. A flange is provided on the top of the valve body, and a drive mechanism for rotating the valve stem spindle is installed on the flange. An indicator for displaying the angle is provided on the drive mechanism, and a pointer for indicating the angle is installed on the top of the valve stem spindle.

[0006] The aforementioned hydraulic triple eccentric butterfly valve has a drive mechanism including a crank mounted on the upper part of the valve stem shaft, one end of which is hinged to the movable end of the hydraulic cylinder, a hydraulic cylinder mounting seat for mounting the hydraulic cylinder is provided on the top of the flange, and a hinge seat that is hinged to the hydraulic cylinder mounting seat is sleeved on the outside of the hydraulic cylinder.

[0007] In the aforementioned hydraulic triple eccentric butterfly valve, the indicator is mounted on the top of the hydraulic cylinder mounting base and is concentrically positioned with the valve stem spindle.

[0008] In the aforementioned hydraulic triple eccentric butterfly valve, a sealing ring is provided between the valve seat and the valve body to cooperate with the valve plate and ensure the sealing performance of the valve body.

[0009] In the aforementioned hydraulic triple eccentric butterfly valve, pressure caps are respectively provided between the top of the valve body and the upper part of the valve stem main shaft, and between the bottom of the valve body and the lower part of the valve stem main shaft to ensure the sealing of the valve body.

[0010] The aforementioned hydraulic triple eccentric butterfly valve also has a baffle plate on its valve body for limiting the rotation of the valve plate.

[0011] Due to the adoption of the above technical solutions, the technological progress achieved by this utility model is as follows.

[0012] This utility model provides a hydraulic triple eccentric butterfly valve. By setting an indicator and a pointer coaxially set with the valve stem spindle, the rotation angle of the valve stem spindle and the valve plate is displayed in real time. By directly reading the angle value and calculating according to the valve flow characteristic curve, the flow rate at that time can be accurately obtained, realizing the precise adjustment of the butterfly valve flow rate. Furthermore, the valve stem spindle is driven to rotate by a hydraulic cylinder and a crank. The drive mechanism has a simple structure and is easy to maintain, solving the problems of long transmission chain, efficiency loss and complex maintenance of transmission drive mechanisms. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the specific structure of the present utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of this utility model.

[0015] The components are: 1. Valve body, 2. Valve plate, 3. Valve stem spindle, 4. Crank, 5. Hydraulic cylinder, 6. Pressure flange, 7. Hydraulic cylinder mounting base, 8. Hinge seat, 9. Indicator, 10. Pointer, 11. Baffle, 12. Valve seat, 13. Sealing ring. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0017] Hydraulic triple offset butterfly valve, such as Figures 1 to 2 As shown, the valve includes a valve body 1, a valve plate 2, a valve stem 3, and a valve seat 12. The valve plate 2 is connected to the valve port of the valve body 1, and the valve stem 3 is connected to the valve plate 2. The valve seat 12 is located around the valve port of the valve body 1. A flange 6 is provided on the top of the valve body 1. A drive mechanism for rotating the valve stem 3 is installed on the flange 6. An indicator 9 for displaying the angle is provided on the drive mechanism. A pointer 10 for indicating the angle is installed on the top of the valve stem 3.

[0018] A sealing ring 13 is provided between the valve seat 12 and the valve body 1. The edge of the sealing ring 13 contacts the outer periphery of the valve plate to seal, thereby ensuring the sealing performance of the valve body.

[0019] The drive mechanism includes a crank 4 mounted on the upper part of the valve stem main shaft 3. One end of the crank 4 is hinged to the movable end of the hydraulic cylinder 5. A hydraulic cylinder mounting seat 7 for mounting the hydraulic cylinder 5 is provided on the top of the flange 6. A hinge seat 8 that is hinged to the hydraulic cylinder mounting seat 7 is sleeved on the outside of the hydraulic cylinder 5.

[0020] The indicator 9 is set on the top of the hydraulic cylinder mounting base 7 and is concentrically set with the valve stem spindle 3. The hydraulic cylinder 5 drives the crank 4 to rotate, which in turn drives the valve stem spindle 3 to rotate, thereby realizing the rotation of the valve plate and realizing the flow regulation. At the same time, the top of the valve stem spindle 3 is equipped with an indicator to display the rotation angle of the valve plate. The flow rate at that time is obtained by reading the angle, so as to realize the precise regulation of the flow rate.

[0021] Pressure caps are provided between the top of the valve body 1 and the upper part of the valve stem main shaft 3, and between the bottom of the valve body 1 and the lower part of the valve stem main shaft 3, respectively, to ensure the sealing of the valve body.

[0022] The valve body 1 is also provided with a baffle 11 for limiting the rotation of the valve plate 2 to prevent the rotation angle of the valve plate 2 from exceeding the limit.

[0023] This utility model provides a hydraulic triple eccentric butterfly valve. By setting an indicator and a pointer coaxially set with the valve stem spindle, the rotation angle of the valve stem spindle and the valve plate is displayed in real time. By directly reading the angle value and calculating according to the valve flow characteristic curve, the flow rate at that time can be accurately obtained, realizing the precise adjustment of the butterfly valve flow rate. Furthermore, the valve stem spindle is driven to rotate by a hydraulic cylinder and a crank. The drive mechanism has a simple structure and is easy to maintain, solving the problems of long transmission chain, efficiency loss and complex maintenance of transmission drive mechanisms.

Claims

1. A hydraulically operated triple eccentric butterfly valve, characterized in that: The valve body (1), valve plate (2), valve stem spindle (3), and valve seat (12) are included. The valve plate (2) is connected to the valve port of the valve body (1), the valve stem spindle (3) is connected to the valve plate (2), and the valve seat (12) is located on the periphery of the valve port of the valve body (1). A pressure flange (6) is provided on the top of the valve body (1), and a drive mechanism for rotating the valve stem spindle (3) is installed on the pressure flange (6). An indicator (9) for displaying the angle is provided on the drive mechanism, and a pointer (10) for indicating the angle is installed on the top of the valve stem spindle (3).

2. The hydraulic triple eccentric butterfly valve according to claim 1, characterized in that: The drive mechanism includes a crank (4) located on the upper part of the valve stem (3), one end of the crank (4) is hinged to the movable end of the hydraulic cylinder (5), and a hydraulic cylinder mounting seat (7) for mounting the hydraulic cylinder (5) is provided on the top of the flange (6), and a hinge seat (8) that is hinged to the hydraulic cylinder mounting seat (7) is sleeved on the outside of the hydraulic cylinder (5).

3. The hydraulic triple eccentric butterfly valve according to claim 2, characterized in that: The indicator (9) is set on top of the hydraulic cylinder mounting base (7) and is concentrically set with the valve stem spindle (3).

4. The hydraulic triple eccentric butterfly valve according to claim 1, characterized in that: A sealing ring (13) is provided between the valve seat (12) and the valve body (1) to cooperate with the valve plate (2) to ensure the sealing of the valve body.

5. The hydraulic triple eccentric butterfly valve according to claim 1, characterized in that: Pressure caps are provided between the top of the valve body (1) and the upper part of the valve stem main shaft (3) and between the bottom of the valve body (1) and the lower part of the valve stem main shaft (3) to ensure the sealing of the valve body.

6. The hydraulic triple eccentric butterfly valve according to claim 1, characterized in that: The valve body (1) is also provided with a baffle (11) for limiting the rotation of the valve plate (2).

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