Marine butterfly valve butterfly plate angle positioning and locking mechanism

Abstract

The utility model discloses a marine butterfly valve butterfly plate angle positioning locking mechanism relates to marine butterfly valve technical field, the utility model discloses a butterfly valve body is provided with the butterfly plate in the cavity of butterfly valve body, the surface fixedly connected with rotary rod of butterfly plate, the top of butterfly valve body is provided with the positioning disc, and the top of rotary rod penetrates butterfly valve body and positioning disc and is provided with locking mechanism, the locking mechanism includes the U type support, the utility model discloses a locking mechanism, utilizes the stable connection of U type support and butterfly valve body and realizes the rigid support of overall structure, and the locking ring of rotary rod top and the linkage locking effect of the connecting plate and lock block that drive link form, so that the valve can be locked position quickly and reliably when needing to fix, effectively prevent the valve rotation caused by accidental loosening or misoperation, improve the security and stability of equipment operation, and compact structure, easy operation, convenient daily maintenance and use.

Description

Technical Field

[0001] This utility model belongs to the technical field of marine butterfly valves, and in particular relates to a marine butterfly valve butterfly plate angle positioning and locking mechanism. Background Technology

[0002] As a key component in marine piping systems, the angle positioning and locking of the butterfly plate in marine butterfly valves directly affect the valve's flow regulation accuracy and sealing performance. Existing butterfly plate angle positioning and locking mechanisms in marine butterfly valves typically consist of a positioning component and a locking component. The positioning component limits the rotation angle of the butterfly plate, while the locking component fixes the butterfly plate at a set angle. However, the design of the matching structure between the positioning and locking components in existing mechanisms is unreasonable. Positioning deviation easily occurs during locking after positioning, and the locking structure is prone to loosening under external factors such as vibration and turbulence during ship navigation, leading to changes in the butterfly plate angle and an inability to maintain a stable positioning and locking effect over a long period, thus affecting the normal operation of the ship's piping system.

[0003] A Chinese patent application with publication number CN217633935U discloses a novel limiting device structure for a butterfly valve operating under high-speed alternating airflow on a ship, comprising a universal coupling, a coupling sleeve, and a locking bracket. The universal coupling is connected to the locking device, which is formed by a cylindrical pin connecting the locking bracket and the coupling sleeve, and is installed at the protruding end of the valve stem. The locking bracket is installed on the upper flange of the valve body by screws, and the coupling sleeve is connected to the end of the valve stem by a spline. Holes are opened on one side of both the coupling sleeve and the locking bracket. The positioning holes are set to lock when the valve opening is 80°, 85°, and 90°, with an angle difference of 5° between the two holes. When the positioning holes of the locking bracket and the coupling sleeve are aligned, the cylindrical pin is fixed to the coupling sleeve by threads and enters the positioning hole of the locking bracket.

[0004] While adapting to the special operating conditions of high-speed alternating airflow on ships and solving the problem of valve stems lacking self-locking capability in ship steam turbine units, the precise matching of cylindrical pins and positioning holes can control the positioning error of the butterfly plate within 5°, ensuring reliable display accuracy of the drive device. The structure boasts strong structural stability; the coupling sleeve and valve stem are connected by a spline, the locking bracket is installed with screws, and the cylindrical pin is fixed with threads. These multiple fixing methods reduce component loosening under the impact of high-speed airflow and maintain positioning stability during long-term use. However, the locking operation is cumbersome, requiring alignment of the positioning holes before fixing the cylindrical pin with threads. Compared to the original structure's locking method of rotating a rod to drive the locking block, the operation efficiency is lower. Furthermore, under long-term ship vibration conditions, the threaded connection of the cylindrical pin is prone to wear and loosening. The spline connection and multi-component assembly structure also increase the difficulty of disassembling and replacing parts during later maintenance, resulting in higher maintenance costs.

[0005] To address this issue, we provide a marine butterfly valve disc angle positioning and locking mechanism. Utility Model Content

[0006] The purpose of this utility model is to provide a positioning and locking mechanism for the angle of the butterfly plate of a marine butterfly valve. By cooperating with the locking mechanism and the driving mechanism, it solves the problem that the positioning and locking reliability of the existing marine butterfly valve angle positioning and locking mechanism is insufficient, and that positioning offset and locking loosening are prone to occur due to external factors or locking fit problems.

[0007] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution.

[0008] This utility model relates to a butterfly valve disc angle positioning and locking mechanism for marine butterfly valves, comprising a butterfly valve body, a butterfly disc arranged in the inner cavity of the butterfly valve body, a rotating rod fixedly connected to the surface of the butterfly disc, a positioning plate arranged on the top of the butterfly valve body, and a locking mechanism provided at the top of the rotating rod passing through the butterfly valve body and the positioning plate. The locking mechanism includes a U-shaped bracket, the front and rear sides of the bottom of the U-shaped bracket being fixedly connected to the butterfly valve body, a locking ring fixedly connected at the top of the rotating rod passing through the U-shaped bracket, an installation port being provided on the front side of the U-shaped bracket, two rotating shafts being fixedly connected to the top of the inner cavity of the installation port, a rotating rod being movably connected between the two rotating shafts, a connecting plate being movably connected to the surface of the rotating rod, and a locking block being fixedly connected to the rear side of the top of the connecting plate.

[0009] The present invention is further configured such that the surface of the locking ring is provided with a plurality of locking grooves that cooperate with the locking block, and the bottom of the connecting plate is provided with a driving mechanism. The locking grooves on the surface of the locking ring are mainly used to accommodate the locking block to achieve a tight fit, and the driving mechanism at the bottom of the connecting plate is responsible for providing power to control the locking or releasing action of the locking block.

[0010] The present invention is further configured such that the driving mechanism includes a motor, the bottom of the motor is fixedly connected to a U-shaped bracket, a screw is fixedly connected to the output end of the rear side of the motor, a movable sleeve is threadedly connected to the surface of the screw, a sliding mechanism is provided at the bottom of the movable sleeve, and the top of the movable sleeve is fixedly connected to a connecting plate. The core of the driving mechanism is the motor, which is fixed on the U-shaped bracket to provide stable support. When the motor rotates, it drives the screw at the rear end to rotate. The screw converts the rotational motion into the linear movement of the movable sleeve through the threaded engagement with the movable sleeve. The sliding mechanism at the bottom of the movable sleeve ensures that its movement trajectory is smooth, while the fixed connection at its top ultimately transmits this linear driving force to the connecting plate above.

[0011] The present invention is further configured such that the sliding mechanism includes a slide rail, the bottom of the slide rail is fixedly connected to a U-shaped bracket, a slider is slidably connected to the surface of the slide rail, the top of the slider is fixedly connected to a movable sleeve, the slide rail is fixed to the U-shaped bracket to provide a stable guiding reference, the slider sliding on the surface of the slide rail ensures the linearity of the movement, and the fixed connection between the slider and the top of the movable sleeve directly transmits this smooth linear motion to the movable sleeve.

[0012] The present invention is further configured such that a positioning mechanism is provided at the bottom of the U-shaped bracket, the positioning mechanism including two electric push rods, the tops of the two electric push rods being fixedly connected to the U-shaped bracket, the output ends of the two electric push rods on opposite sides being fixedly connected to a mounting plate, and a pressing plate being fixedly connected to the opposite side of the mounting plate. Limiting mechanisms are provided on the left and right sides of the mounting plate. The positioning mechanism is fixed to the U-shaped bracket by the tops of the two electric push rods to provide support and drive. The extended ends of the electric push rods are respectively connected to the mounting plate to transmit power. The mounting plate drives the pressing plate to move linearly in opposite directions to achieve clamping and positioning or loosening. The limiting mechanisms on both sides of the mounting plate are used to constrain and stabilize the entire clamping action.

[0013] The present invention is further configured such that the limiting mechanism includes a slide rod, the opposite side of which is fixedly connected to a U-shaped bracket, a sliding sleeve is slidably connected to the surface of the slide rod, and the opposite side of the sliding sleeve is fixedly connected to the mounting plate. The slide rod in the limiting mechanism is fixed to the U-shaped bracket at both ends to provide rigid guidance. The sliding of the sliding sleeve on the surface of the slide rod ensures the linearity and stability of the movement of the mounting plate and the extrusion plate on it. The fixed connection between the sliding sleeve and the mounting plate directly transmits this stable guiding constraint to the entire mounting plate.

[0014] The present invention is further configured such that a friction pad is provided on one side opposite to the extrusion plate, a rotary knob is fixedly connected to the top of the locking ring, and an anti-slip block is provided on the surface of the rotary knob. The friction pad on the inner side of the extrusion plate is used to increase the friction of the contact surface during clamping to ensure stable positioning. The rotary knob on the top of the locking ring provides a point for manually operating the locking ring, while the anti-slip block on the surface of the rotary knob is used to increase friction when holding the hand to prevent slippage.

[0015] The present invention has the following beneficial effects.

[0016] 1. This utility model achieves rigid support for the overall structure through a locking mechanism that utilizes the stable connection between the U-shaped bracket and the butterfly valve body. The locking ring at the top of the rotating rod and the rotating rod drive the connecting plate and locking block to form a linkage locking effect, so that the valve can be quickly and reliably locked in position when it needs to be fixed, effectively preventing valve rotation caused by accidental loosening or misoperation, improving the safety and stability of equipment operation. At the same time, the structure is compact, the operation is simple, and it is convenient for daily maintenance and use.

[0017] 2. This utility model uses a drive mechanism to drive a screw to rotate and move a movable sleeve to achieve precise linear displacement. Its structure uses a U-shaped bracket to stably support the motor to ensure smooth operation. The sliding mechanism at the bottom of the movable sleeve effectively counteracts rotational force and enhances motion guidance. The connecting plate at the top can directly transmit reliable thrust. The overall design is compact, has high transmission efficiency, is responsive and durable, and is suitable for application scenarios that require stable and controllable linear propulsion. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0019] Figure 1 A 3D view of the angle positioning and locking mechanism for a marine butterfly valve.

[0020] Figure 2 A side view of the angle positioning and locking mechanism for a marine butterfly valve.

[0021] Figure 3 A 3D view of the locking mechanism in the butterfly valve's angle positioning and locking mechanism.

[0022] Figure 4 A 3D view of the drive mechanism in the butterfly plate angle positioning and locking mechanism of a marine butterfly valve.

[0023] Figure 5 A 3D view of the positioning mechanism in the butterfly plate angle positioning and locking mechanism of a marine butterfly valve.

[0024] In the attached diagram: 1. Butterfly valve body; 101. Butterfly plate; 102. Rotating rod; 103. Positioning plate; 2. Locking mechanism; 21. U-shaped bracket; 22. Locking ring; 23. Mounting port; 24. Rotating shaft; 25. Rotating rod; 26. Connecting plate; 27. Locking block; 3. Drive mechanism; 31. Motor; 32. Screw; 33. Moving sleeve; 34. Sliding mechanism; 341. Slide rail; 342. Slider; 4. Positioning mechanism; 41. Electric push rod; 42. Mounting plate; 43. Pressing plate; 44. Limiting mechanism; 441. Slide rod. Detailed Implementation

[0025] The technical solutions of the present utility model will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] Please see Figure 1-5This utility model is a butterfly valve plate angle positioning and locking mechanism for marine butterfly valves, including a butterfly valve body 1. A butterfly plate 101 is provided in the inner cavity of the butterfly valve body 1. A rotating rod 102 is fixedly connected to the surface of the butterfly plate 101. A positioning plate 103 is provided on the top of the butterfly valve body 1. The top of the rotating rod 102 passes through the butterfly valve body 1 and the positioning plate 103 and is provided with a locking mechanism 2. The locking mechanism 2 includes a U-shaped bracket 21. The front and rear sides of the bottom of the U-shaped bracket 21 are fixedly connected to the butterfly valve body 1. The top of the rotating rod 102 passes through the U-shaped bracket 21 and is fixedly connected with a locking ring 22. An installation port 23 is opened on the front side of the U-shaped bracket 21. Two rotating shafts 24 are fixedly connected to the top of the inner cavity of the installation port 23. A rotating rod 25 is movably connected between the two rotating shafts 24. A connecting plate 26 is movably connected to the surface of the rotating rod 25. A locking block 27 is fixedly connected to the rear side of the top of the connecting plate 26.

[0027] Specifically: The butterfly valve body 1 serves as the main structure of the entire valve. The butterfly plate 101 within its cavity controls the flow of media. The rotating rod 102 fixed to the surface of the butterfly plate 101 is the core transmission component driving the rotation of the butterfly plate 101. The positioning disc 103 at the top of the butterfly valve body 1 provides support and positioning. The rotating rod 102 extends upwards through the butterfly valve body 1 and the positioning disc 103. A locking mechanism 2 at its top is used to fix the position of the rotating rod 102. This mechanism includes a U-shaped bracket 21 fixedly connected to the butterfly valve body 1. To support the frame, the locking ring 22 fixed at the top of the rotating rod 102 cooperates with the bracket to achieve locking. The mounting port 23 on the front side of the U-shaped bracket 21 is used to accommodate the operating parts. The two rotating shafts 24 fixedly connected to the top of the inner cavity of the mounting port 23 provide rotational support. The rotating rod 25 movably connected between the two rotating shafts 24 serves as an operating lever. The connecting plate 26 movably connected to the surface of the rotating rod 25 converts the rotational motion into linear motion. The locking block 27 fixed to the rear side of the top of the connecting plate 26 directly contacts the locking ring 22 and achieves position locking when the mechanism is in motion.

[0028] The surface of the locking ring 22 is provided with several locking grooves that cooperate with the locking block 27. A drive mechanism 3 is provided at the bottom of the connecting plate 26. The drive mechanism 3 includes a motor 31, the bottom of which is fixedly connected to the U-shaped bracket 21. A screw 32 is fixedly connected to the output end of the rear side of the motor 31. A movable sleeve 33 is threadedly connected to the surface of the screw 32. A sliding mechanism 34 is provided at the bottom of the movable sleeve 33. The top of the movable sleeve 33 is fixedly connected to the connecting plate 26. The sliding mechanism 34 includes a slide rail 341, the bottom of which is fixedly connected to the U-shaped bracket 21. A slider 342 is slidably connected to the surface of the slide rail 341. The top of the slider 342 is fixedly connected to the movable sleeve 33. A fixed... Positioning mechanism 4 includes two electric push rods 41. The tops of the two electric push rods 41 are fixedly connected to the U-shaped bracket 21. The output ends of the two electric push rods 41 on opposite sides are fixedly connected to the mounting plate 42. The opposite side of the mounting plate 42 is fixedly connected to the pressing plate 43. Limiting mechanisms 44 are provided on the left and right sides of the mounting plate 42. Limiting mechanisms 44 include slide rods 441. The opposite side of the slide rods 441 is fixedly connected to the U-shaped bracket 21. The surface of the slide rods 441 is slidably connected to a sliding sleeve. The opposite side of the sliding sleeve is fixedly connected to the mounting plate 42. The opposite side of the pressing plate 43 is provided with a friction pad. The top of the locking ring 22 is fixedly connected to a rotary knob. The surface of the rotary knob is provided with an anti-slip block 342.

[0029] Specifically: the locking groove on the surface of the locking ring 22 is used to cooperate with the locking block 27 to achieve the locking function. The drive mechanism 3 at the bottom of the connecting plate 26 drives the screw 32 to rotate through the motor 31, so that the threaded movable sleeve 33 moves along the axial direction of the screw 32, thereby driving the connecting plate 26 to move. The sliding mechanism 34 at the bottom of the movable sleeve 33 ensures the smooth movement of the movable sleeve 33 through the sliding cooperation between the slide rail 341 and the slider 342. The positioning mechanism 4 at the bottom of the U-shaped bracket 21 uses the electric push rod 41 to push the mounting plate 42 and the extrusion plate 43 to move in opposite directions to achieve the clamping and positioning of the workpiece. The limiting mechanism 44 on both sides of the mounting plate 42 constrains the movement trajectory of the mounting plate 42 through the sliding connection between the slide rod 441 and the slide sleeve. The friction pad on the inner side of the extrusion plate 43 is used to increase the clamping stability. The rotary knob on the top of the locking ring 22 facilitates manual operation of the locking ring 22, and its anti-slip design improves the ease of operation.

[0030] The working principle of this utility model is as follows: During operation, when the butterfly valve needs to adjust the angle of the butterfly plate 101, the rotating locking ring 22 drives the rotating rod 102 and the butterfly plate 101 to rotate to the required position, and the positioning plate 103 provides an angle reference; then the drive mechanism 3 starts, the motor 31 drives the screw 32 to rotate, causing the moving sleeve 33 to move linearly along the slide rail 341, thereby pushing the connecting plate 26 to swing around the rotating rod 25, so that the locking block 27 is embedded in the corresponding locking groove of the locking ring 22 to achieve mechanical locking; at the same time, the electric push rod 41 of the positioning mechanism 4 pushes the pressing plate 43 to move towards each other, and the friction pad holds the rotating rod 102 to assist in positioning, and the limiting mechanism 44 ensures that the pressing plate 43 moves smoothly; the locking and positioning work together to ensure that the butterfly plate 101 maintains a stable angle under ship vibration conditions and prevents accidental loosening or displacement.

[0031] The preferred embodiments of the present utility model disclosed above are only used to help illustrate the present utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the present utility model to the specific implementation methods described. The present specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the present utility model, so that those skilled in the art can better understand and utilize the present utility model.

Claims

1. A marine butterfly valve disc angle positioning and locking mechanism, comprising a butterfly valve body (1), characterized in that: The inner cavity of the butterfly valve body (1) is provided with a butterfly plate (101), and a rotating rod (102) is fixedly connected to the surface of the butterfly plate (101). A positioning plate (103) is provided on the top of the butterfly valve body (1). The top of the rotating rod (102) passes through the butterfly valve body (1) and the positioning plate (103) and is provided with a locking mechanism (2). The locking mechanism (2) includes a U-shaped bracket (21). The front and rear sides of the bottom of the U-shaped bracket (21) are fixedly connected to the butterfly valve body (1). The top of the rotating rod (102) passes through the U-shaped bracket (21) and is fixedly connected to a locking ring (22). An installation port (23) is opened on the front side of the U-shaped bracket (21). Two rotating shafts (24) are fixedly connected to the top of the inner cavity of the installation port (23). A rotating rod (25) is movably connected between the two rotating shafts (24). A connecting plate (26) is movably connected to the surface of the rotating rod (25). A locking block (27) is fixedly connected to the rear side of the top of the connecting plate (26).

2. The marine butterfly valve disc angle positioning and locking mechanism according to claim 1, characterized in that: The surface of the locking ring (22) is provided with several locking grooves that cooperate with the locking block (27), and the bottom of the connecting plate (26) is provided with a driving mechanism (3).

3. The marine butterfly valve disc angle positioning and locking mechanism according to claim 2, characterized in that: The drive mechanism (3) includes a motor (31), the bottom of which is fixedly connected to a U-shaped bracket (21), and a screw (32) is fixedly connected to the output end of the rear side of the motor (31). A movable sleeve (33) is threadedly connected to the surface of the screw (32), and a sliding mechanism (34) is provided at the bottom of the movable sleeve (33). The top of the movable sleeve (33) is fixedly connected to a connecting plate (26).

4. The marine butterfly valve disc angle positioning and locking mechanism according to claim 3, characterized in that: The sliding mechanism (34) includes a slide rail (341), the bottom of which is fixedly connected to a U-shaped bracket (21), and a slider (342) is slidably connected to the surface of the slide rail (341), the top of which is fixedly connected to a movable sleeve (33).

5. The marine butterfly valve disc angle positioning and locking mechanism according to claim 1, characterized in that: The bottom of the U-shaped bracket (21) is provided with a positioning mechanism (4). The positioning mechanism (4) includes two electric push rods (41). The tops of the two electric push rods (41) are fixedly connected to the U-shaped bracket (21). The output ends of the two electric push rods (41) on opposite sides are fixedly connected to a mounting plate (42). The opposite side of the mounting plate (42) is fixedly connected to a pressing plate (43). The left and right sides of the mounting plate (42) are provided with limit mechanisms (44).

6. The marine butterfly valve disc angle positioning and locking mechanism according to claim 5, characterized in that: The limiting mechanism (44) includes a slide rod (441), the opposite side of which is fixedly connected to a U-shaped bracket (21), and a sliding sleeve is slidably connected to the surface of the slide rod (441), the opposite side of which is fixedly connected to a mounting plate (42).

7. The marine butterfly valve disc angle positioning and locking mechanism according to claim 5, characterized in that: A friction pad is provided on the opposite side of the extrusion plate (43), and a rotary knob is fixedly connected to the top of the locking ring (22), with an anti-slip block (342) provided on the surface of the rotary knob.

Images