Butterfly valve electro-hydraulic driving device for valve control

Abstract

The utility model discloses a butterfly valve electro-hydraulic driving device for valve control, and relates to the technical field of butterfly valves. Comprising a valve body, a valve seat is fixedly connected to the outer wall of the valve body, a connecting device is rotatably connected to the outer wall of the valve seat, butterfly wings are fixedly connected to the outer wall of the connecting device, the connecting device comprises a valve rod, a sealing ring is rotatably connected to the outer wall of the valve rod, and a gear ring is fixedly connected to the outer wall of the valve rod. A protective shell is fixedly connected to the outer wall of the valve seat, a hydraulic driving device is fixedly connected to the inner wall of the protective shell, an electronic adjusting device is fixedly connected to the outer wall of the valve seat, a rack and a gear are driven by a hydraulic cylinder to transmit, high-torque driving force is provided, and quick opening and closing of the butterfly wings are achieved. A servo motor in the electronic adjusting device is matched to control the position of the extrusion plate, a buffer structure composed of a damping rod and a compression spring is utilized, the movement inertia of the connecting block is effectively buffered, and vibration deviation during opening and closing is avoided.

Description

Technical Field

[0001] This utility model relates to the field of butterfly valve technology, specifically to an electro-hydraulic drive device for butterfly valve control. Background Technology

[0002] In high-pressure, high-velocity industrial fluid transportation scenarios such as petrochemicals and natural gas transmission, butterfly valves are core equipment for flow control and emergency shut-off. The performance of their drive devices directly affects the safety and stability of system operation. Traditional butterfly valve electro-hydraulic drive devices mostly rely on a single hydraulic drive structure: on the one hand, during the opening and closing process of the hydraulic system, the inertial impact causes the butterfly to vibrate violently after it reaches its position, especially under rapid opening and closing conditions, which leads to inaccurate valve opening control and causes the risk of fluid leakage. On the other hand, when the fluid pressure in the pipeline suddenly fluctuates, the butterfly is prone to angular deviation, making it difficult to maintain a stable control opening and thus ensuring stable flow regulation. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this utility model provides an electro-hydraulic drive device for butterfly valve control. Through the synergistic effect of hydraulic and electronic regulation, it utilizes a damping buffer structure to absorb inertial impacts and elastic clamping to ensure stable positioning of the butterfly wing, thereby solving the problem of valve control inaccuracy under high pressure and high frequency conditions and improving the reliability and safety of industrial fluid transport systems.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: an electro-hydraulic drive device for a butterfly valve for valve control, comprising a valve body, a valve seat fixedly connected to the outer wall of the valve body, a connecting device rotatably connected to the outer wall of the valve seat, a butterfly wing fixedly connected to the outer wall of the connecting device, the connecting device comprising a valve stem, a sealing ring rotatably connected to the outer wall of the valve stem, a toothed ring fixedly connected to the outer wall of the valve stem, a protective shell fixedly connected to the outer wall of the valve seat, a hydraulic drive device fixedly connected to the inner wall of the protective shell, and an electronic adjustment device fixedly connected to the outer wall of the valve seat;

[0007] Preferably, the hydraulic drive device includes a hydraulic cylinder, a first fluid inlet is fixedly connected to the inner wall of the hydraulic cylinder, a second fluid inlet is fixedly connected to the inner wall of the end of the hydraulic cylinder away from the first fluid inlet, a connecting block is fixedly connected to the outer wall of the hydraulic cylinder via a piston, and a rack is fixedly connected to the outer wall at the bottom of the connecting block.

[0008] Preferably, the outer wall of the hydraulic cylinder is fixedly connected to the inner wall of the protective shell, the outer walls of the first and second fluid inlets are both fixedly connected to the inner wall of the protective shell, the outer walls of the rack and the connecting block are slidably connected to the inner wall of the valve seat, the outer wall of the valve stem is fixedly connected to the outer wall of the butterfly wing, the outer side wall of the sealing ring is fixedly connected to the inner wall of the valve seat, and the gear ring meshes with the rack.

[0009] Preferably, the electronic adjustment device includes a limiting frame, a protective block fixedly connected to the outer wall of the limiting frame, a damping rod fixedly connected to the outer wall of the protective block, a compression spring sleeved on the outside of the damping rod, a pressing plate fixedly connected to the end of the damping rod away from the protective block, a servo motor fixedly connected to the outer wall of the limiting frame, a screw fixedly connected to the output end of the servo motor, a guide block threadedly connected to the outer wall of the screw, one end of the compression spring fixedly connected to the outer wall of the pressing plate, the other end of the compression spring fixedly connected to the outer wall of the protective block, and the outer wall of the limiting frame fixedly connected to the end of the damping rod away from the protective block.

[0010] Preferably, the outer wall of the guide block is slidably connected to the outer wall of the extrusion plate, the outer wall of the extrusion plate is slidably connected to the outer wall of the limiting frame, the outer wall of the limiting frame is fixedly connected to the outer wall of the valve seat, and the inner wall of the limiting frame is slidably connected to the outer wall of the connecting block.

[0011] (III) Beneficial Effects

[0012] This utility model provides an electro-hydraulic drive device for butterfly valve control. It has the following advantages:

[0013] (i) The electro-hydraulic drive device provides high torque driving force through the hydraulic cylinder driving the rack and pinion transmission to realize the rapid opening and closing of the butterfly wing; in conjunction with the servo motor in the electronic adjustment device to control the position of the extrusion plate, the buffer structure composed of the damping rod and the compression spring effectively buffers the moving inertia of the connecting block, avoids vibration and deviation during opening and closing, and ensures the stable operation of the butterfly wing.

[0014] (ii) The electro-hydraulic drive device and the electronic adjustment device use the extrusion plate to elastically clamp the connecting block. When the butterfly wing reaches the target opening, the extrusion plate driven by the guide block clamps the connecting block to keep it fixed, preventing the butterfly wing from shaking due to hydraulic shock or fluid pressure fluctuation, thereby achieving positioning and improving the reliability of valve control. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the overall internal structure of this utility model;

[0017] Figure 3 This is a partial structural diagram of the connecting device of this utility model;

[0018] Figure 4 This is a schematic diagram of the electronic adjustment device of this utility model;

[0019] Figure 5 This is a schematic diagram of the hydraulic drive device of this utility model;

[0020] Figure 6 This is a partial structural diagram of the servo motor of this utility model.

[0021] In the diagram: 1. Valve body; 2. Valve seat; 3. Butterfly wing; 4. Connecting device; 5. Protective shell; 6. Electronic regulating device; 7. Hydraulic drive device; 41. Valve stem; 42. Sealing ring; 43. Gear ring; 61. Limiting bracket; 62. Protective block; 63. Damping rod; 64. Compression spring; 65. Extrusion plate; 66. Servo motor; 67. Screw; 68. Guide block; 71. Hydraulic cylinder; 72. First fluid inlet; 73. Second fluid inlet; 74. Connecting block; 75. Rack. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-6 This utility model provides a technical solution: an electro-hydraulic drive device for a butterfly valve for valve control, comprising a valve body 1, a valve seat 2 fixedly connected to the outer wall of the valve body 1, a connecting device 4 rotatably connected to the outer wall of the valve seat 2, a butterfly wing 3 fixedly connected to the outer wall of the connecting device 4, the connecting device 4 including a valve stem 41, a sealing ring 42 rotatably connected to the outer wall of the valve stem 41, a toothed ring 43 fixedly connected to the outer wall of the valve stem 41, a protective shell 5 fixedly connected to the outer wall of the valve seat 2, and a hydraulic drive device 7 fixedly connected to the inner wall of the protective shell 5. The hydraulic cylinder 71 of the electronic regulating device 6 and the hydraulic drive device 7 is connected to the hydraulic system through the first fluid inlet 72 or the second fluid inlet 73. When high-pressure oil is injected from the first fluid inlet 72, it pushes the piston to drive the connecting block 74 and the rack 75 to slide. The rack 75 meshes with the toothed ring 43 on the outer wall of the valve stem 41, driving the valve stem 41 to rotate clockwise and drive the butterfly wing 3 to open. Conversely, when high-pressure oil is injected from the second fluid inlet 73, the rack 75 slides in the opposite direction, the valve stem 41 rotates counterclockwise, the butterfly wing 3 closes, and the sealing ring 42 ensures the sealing performance of the valve stem 41 when it rotates.

[0024] The hydraulic drive device 7 includes a hydraulic cylinder 71, a first fluid inlet 72 is fixedly connected to the inner wall of the hydraulic cylinder 71, a second fluid inlet 73 is fixedly connected to the inner wall of the end of the hydraulic cylinder 71 away from the first fluid inlet 72, a connecting block 74 is fixedly connected to the outer wall of the hydraulic cylinder 71 through a piston, and a rack 75 is fixedly connected to the outer wall at the bottom of the connecting block 74.

[0025] The outer wall of the hydraulic cylinder 71 is fixedly connected to the inner wall of the protective shell 5. The outer walls of the first liquid nozzle 72 and the second liquid nozzle 73 are both fixedly connected to the inner wall of the protective shell 5. The outer walls of the rack 75 and the connecting block 74 are slidably connected to the inner wall of the valve seat 2. The outer wall of the valve stem 41 is fixedly connected to the outer wall of the butterfly wing 3. The outer side wall of the sealing ring 42 is fixedly connected to the inner wall of the valve seat 2. The gear ring 43 meshes with the rack 75. The hydraulic drive device 7 and the electronic adjustment device 6 work together. The hydraulic system provides high torque driving force through gear transmission to realize the rapid opening and closing of the butterfly wing 3. The electronic adjustment device 6 controls the position of the extrusion plate 65 through the servo motor 66 and uses damping buffer and elastic clamping to buffer the moving inertia of the connecting block 74.

[0026] The electronic adjustment device 6 includes a limit frame 61, a protective block 62 fixedly connected to the outer wall of the limit frame 61, a damping rod 63 fixedly connected to the outer wall of the protective block 62, a compression spring 64 sleeved on the outside of the damping rod 63, a pressing plate 65 fixedly connected to the end of the damping rod 63 away from the protective block 62, a servo motor 66 fixedly connected to the outer wall of the limit frame 61, a screw 67 fixedly connected to the output end of the servo motor 66, a guide block 68 threadedly connected to the outer wall of the screw 67, and one end of the compression spring 64 fixedly connected to the outer wall of the pressing plate 65. The other end of 64 is fixedly connected to the outer wall of the protective block 62. The outer wall of the limiting frame 61 is fixedly connected to the end of the damping rod 63 away from the protective block 62. The servo motor 66 of the electronic adjustment device 6 drives the screw 67 to rotate, which drives the guide block 68 to move along the limiting frame 61, so that the extrusion plate 65 is pushed to move along the path of the outer inclined surface of the connecting block 74. When the extrusion plate 65 moves into the inner wall of the limiting frame 61, the structure formed by the damping rod 63 and the compression spring 64 is stretched. The extrusion plate 65 clamps the connecting block 74 by the pre-tightening force after the compression spring 64 is stretched.

[0027] The outer wall of the guide block 68 is slidably connected to the outer wall of the extrusion plate 65, the outer wall of the extrusion plate 65 is slidably connected to the outer wall of the limit frame 61, the outer wall of the limit frame 61 is fixedly connected to the outer wall of the valve seat 2, and the inner wall of the limit frame 61 is slidably connected to the outer wall of the connecting block 74.

[0028] In use, when the electro-hydraulic drive device of the butterfly valve is working, the hydraulic cylinder 71 (model: FESTODGC-50-200-PPV-A) of the hydraulic drive device 7 is connected to the hydraulic system through the first fluid port 72 or the second fluid port 73. When high-pressure oil is injected from the first fluid port 72, it pushes the piston to drive the connecting block 74 and the rack 75 to slide. The rack 75 meshes with the toothed ring 43 on the outer wall of the valve stem 41, driving the valve stem 41 to rotate clockwise and drive the butterfly wing 3 to open. Conversely, when high-pressure oil is injected from the second fluid port 73, the rack 75 slides in the opposite direction, the valve stem 41 rotates counterclockwise, the butterfly wing 3 closes, and the sealing ring 42 ensures the sealing performance when the valve stem 41 rotates.

[0029] The servo motor 66 (model: Panasonic MINASA6 series) of the electronic adjustment device 6 drives the screw 67 to rotate, which drives the guide block 68 to move along the limit frame 61, so that the extrusion plate 65 is pushed to move along the path of the outer inclined surface of the connecting block 74. When the extrusion plate 65 moves into the inner wall of the limit frame 61, the structure formed by the damping rod 63 (model: THKLR3-20) and the compression spring 64 is stretched. The extrusion plate 65 clamps the connecting block 74 by the pre-tightening force after the compression spring 64 is stretched, preventing the butterfly wing 3 from shaking due to hydraulic shock or fluid pressure fluctuation, and ensuring that it is stably positioned at the target opening.

[0030] The hydraulic drive device 7 and the electronic adjustment device 6 work together. The hydraulic system provides high torque driving force through gear transmission to realize the rapid opening and closing of the butterfly wing 3. The electronic adjustment device 6 controls the position of the extrusion plate 65 through the servo motor 66. It uses damping buffer and elastic clamping to buffer the moving inertia of the connecting block 74, thereby improving the positioning accuracy and stability of the butterfly wing 3.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An electro-hydraulic drive device for a butterfly valve for valve control, comprising a valve body (1), a valve seat (2) fixedly connected to the outer wall of the valve body (1), a connecting device (4) rotatably connected to the outer wall of the valve seat (2), and a butterfly wing (3) fixedly connected to the outer wall of the connecting device (4), characterized in that: The connecting device (4) comprises a valve rod (41), the outer wall of the valve rod (41) is rotationally connected with a sealing ring (42), the outer wall of the valve rod (41) is fixedly connected with a gear ring (43), the outer wall of the valve seat (2) is fixedly connected with a protective shell (5), the inner wall of the protective shell (5) is fixedly connected with a hydraulic driving device (7), the outer wall of the valve seat (2) is fixedly connected with an electronic adjusting device (6); The hydraulic driving device (7) comprises a hydraulic cylinder (71), the inner wall of the hydraulic cylinder (71) is fixedly connected with a first liquid passage nozzle (72), the inner wall of the one end of the hydraulic cylinder (71) away from the first liquid passage nozzle (72) is fixedly connected with a second liquid passage nozzle (73), the outer wall of the hydraulic cylinder (71) is fixedly connected with a connecting block (74) through a piston, and the outer wall of the bottom of the connecting block (74) is fixedly connected with a gear rack (75).

2. The electro-hydraulic drive device for butterfly valve control according to claim 1, characterized in that: The outer wall of the hydraulic cylinder (71) is fixedly connected with the inner wall of the protective shell (5), the outer wall of the first liquid passage nozzle (72) and the outer wall of the second liquid passage nozzle (73) are both fixedly connected with the inner wall of the protective shell (5), and the outer wall of the gear rack (75) and the outer wall of the connecting block (74) are both slidingly connected with the inner wall of the valve seat (2).

3. The electro-hydraulic drive device for butterfly valve control according to claim 2, characterized in that: The outer wall of the valve rod (41) is fixedly connected with the outer wall of the butterfly wing (3), the side wall outside the sealing ring (42) is fixedly connected with the inner wall of the valve seat (2), and the gear ring (43) is engaged with the gear rack (75).

4. The electro-hydraulic drive device for butterfly valve control according to claim 1, characterized in that: The outer wall of the limiting frame (61) is fixedly connected with a protection block (62), the outer wall of the protection block (62) is fixedly connected with a damping rod (63), the outer part of the damping rod (63) is sleeved with a compression spring (64), one end of the damping rod (63) away from the protection block (62) is fixedly connected with an extrusion plate (65), the outer wall of the limiting frame (61) is fixedly connected with a servo motor (66), the output end of the servo motor (66) is fixedly connected with a screw rod (67), and the outer wall of the screw rod (67) is threadedly connected with a guide block (68).

5. The electro-hydraulic drive device for butterfly valve control according to claim 4, characterized in that: One end of the compression spring (64) is fixedly connected with the outer wall of the extrusion plate (65), the other end of the compression spring (64) is fixedly connected with the outer wall of the protection block (62), and the outer wall of the limiting frame (61) is fixedly connected with one end of the damping rod (63) away from the protection block (62).

6. The electro-hydraulic drive device for butterfly valve control according to claim 4, characterized in that: The outer wall of the guide block (68) is slidingly connected with the outer wall of the extrusion plate (65), the outer wall of the extrusion plate (65) is slidingly connected with the outer wall of the limiting frame (61), the outer wall of the limiting frame (61) is fixedly connected with the outer wall of the valve seat (2), and the inner wall of the limiting frame (61) is slidingly connected with the outer wall of the connecting block (74).

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