Butterfly valve handle torque limiting mechanism

Abstract

The present application relates to butterfly valve field, especially to a kind of butterfly valve handle torque limiting mechanism.The inner wall of valve body is equipped with sealing plate, the circular arc surface of valve body is fixedly connected with gear box, the outer wall of gear box is rotatably connected with valve stem, the rotating disc is fixed in one end of valve stem, the circular arc surface of valve stem is equipped with adjusting assembly, the adjusting assembly includes threaded ring, the threaded ring is sleeved on the circular arc surface of rotating shaft, the end of threaded ring away from rotating disc is fixedly connected with the one side of gear box outer wall, the circular arc surface of threaded ring is screw-connected with adjusting ring.The butterfly valve handle torque limiting mechanism provided by the present application has the advantages that by setting adjusting assembly, when rotating valve stem using rotating disc, the size of torque can be changed by adjusting the extrusion force of ball on rubber pad, which prevents damage of valve stem and other transmission components caused by excessive force, and avoids slow rotation of valve stem caused by insufficient force.

Description

Technical Field

[0001] This invention relates to the field of butterfly valves, and more particularly to a butterfly valve handle torque limiting mechanism. Background Technology

[0002] A butterfly valve is a type of valve that opens, closes, or regulates flow by rotating a disc-shaped valve plate around the valve stem axis. Its main function is to cut off or regulate the flow of media in pipelines. It is characterized by its compact structure, rapid opening and closing, and low fluid resistance.

[0003] Utility model patent CN215214780U discloses a butterfly valve that is easy to lock. The key technical features are: a valve body with a valve stem, a valve cavity formed within the valve body, one end of the valve stem extending into the valve cavity, a butterfly plate disposed within the valve cavity, the end of the valve stem extending into the valve cavity connected to the butterfly plate, a locking device on the valve body, a locking channel on the valve body, the locking device being movably disposed within the locking channel, and a seal at the end of the locking channel near the valve cavity. The sealing bag has an open end connected to a locking device. The sealing bag seals the locking channel and the valve cavity. By setting a locking device inside the locking channel, which is located in the valve body and communicates with the valve cavity, and by sealing the locking channel and the valve cavity with the sealing bag, the locking push rod can be inserted into the valve cavity by the deformation of the sealing bag after the locking push rod is pushed, and the locking push rod is wrapped around it, thereby locking the rotation of the butterfly plate and preventing adverse consequences caused by accidental operation.

[0004] Regarding the above-mentioned issues, the following technical defects were found: the existing butterfly valves do not allow for adjustment of the valve handle torque during use. This makes it inconvenient for people with less strength to turn the valve during maintenance and use, affecting work efficiency, while for people with greater strength, it can easily cause the valve stem to be over-rotated and damaged. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and to propose a butterfly valve handle torque limiting mechanism.

[0006] To solve the above-mentioned technical problems, the present invention provides a butterfly valve handle torque limiting mechanism, comprising: a valve body and a turntable; a sealing plate is installed on the inner wall of the valve body; a gear box is fixedly connected to the arc surface of the valve body; a valve stem is rotatably connected to the outer wall of the gear box; the turntable is fixed to one end of the valve stem; an adjusting component is provided on the arc surface of the valve stem; the adjusting component includes a threaded ring; the threaded ring is sleeved on the arc surface of the rotating shaft; the end of the threaded ring away from the turntable is fixedly connected to one side of the outer wall of the gear box; and the arc surface of the threaded ring is threaded. The valve stem is connected to an adjusting ring. A movable ring is slidably connected to the arc surface of the threaded ring. The upper surface of the adjusting ring abuts against the lower surface of the movable ring. Several locking blocks are fixedly connected to the upper surface of the movable ring. The cross-section of each locking block is a right-angled triangle. Several balls slide through the arc surface of the threaded ring. The balls correspond to the inclined surfaces of the locking blocks. A fixing ring is fixedly connected to the arc surface of the valve stem. An annular hole is formed on the arc surface of the fixing ring. A rubber pad is fixedly connected to the inner wall of the annular hole. The rubber pad abuts against the arc surface of the balls.

[0007] The effect achieved by the above components is as follows: by setting the adjustment component, when using the turntable to rotate the valve stem, the torque can be changed by adjusting the squeezing force of the ball on the rubber pad. This prevents damage to the valve stem and other transmission components due to excessive force, and also avoids slow rotation of the valve stem due to insufficient force.

[0008] Preferably, a limiting rail is fixedly connected to the side of the gear box near the turntable, and a plug is fixedly connected to the arc surface of the movable ring, the plug being slidably connected to the limiting rail.

[0009] The effect achieved by the above components is that by setting the insertion rod and the limiting rail, the position of the movable ring can be limited to prevent the position from shifting when moving up and down.

[0010] Preferably, the arc surface of the insertion rod is threaded with an auxiliary block.

[0011] The effect achieved by the above components is that by setting an auxiliary block and rotating the auxiliary block to abut against the limit rail, the insertion rod can be fixed and limited.

[0012] Preferably, the lower surface of the adjusting ring is provided with a plurality of indicator arrows, and the arc surface of the adjusting ring is provided with a plurality of anti-slip textures.

[0013] The effects achieved by the above components are as follows: by setting anti-slip texture, the adjusting ring can be rotated more easily, preventing slippage when rotating the adjusting ring and affecting work efficiency; the indicator arrows are convenient to use, reminding the user which direction to rotate and adjust the torque.

[0014] Preferably, the arc surface of the threaded ring is fixedly connected to a plurality of positioning rods, the arc surface of the ball is fixedly connected to a limiting plate, and the limiting plate is slidably connected to the arc surface of the positioning rods.

[0015] The effect achieved by the above components is to limit and fix the ball bearings, preventing the ball bearings from shifting position due to the rotation of the turntable.

[0016] Preferably, a coil spring is sleeved on the arc surface of the positioning rod, and the two ends of the coil spring are fixedly connected to the positioning rod and the limiting plate, respectively.

[0017] The effect achieved by the above components is that by setting a coil spring, there is a pulling force on the limiting plate, and the limiting plate is automatically pulled back to its original position when it is not necessary to increase the torque, thereby reducing the torque.

[0018] Preferably, a protective sleeve is fixedly connected to the arc surface of the movable ring, and the protective sleeve is fitted over the outside of the threaded ring.

[0019] The effect achieved by the above-mentioned components is that by setting up a protective cover, the adjustment components can be protected and prevented from being damaged by external factors.

[0020] Compared with related technologies, the butterfly valve handle torque limiting mechanism provided by the present invention has the following beneficial effects: This invention provides a butterfly valve handle torque limiting mechanism. By incorporating an adjustment component, the torque can be altered by adjusting the pressure of the ball bearings on the rubber pad when the valve stem is rotated using a turntable. This prevents damage to the valve stem and other transmission components due to excessive force, while also avoiding slow rotation due to insufficient force. The insertion rod and limit rail limit the position of the movable ring, preventing displacement during vertical movement. An auxiliary block, rotating to engage with the limit rail, fixes and limits the insertion rod. Anti-slip textures facilitate rotation of the adjustment ring, preventing slippage and improving efficiency. Indicator arrows provide ease of use, reminding the user of the rotation direction. Adjusting the torque limits and fixes the ball bearings, preventing displacement during turntable rotation. A coil spring provides tension to the limit plate, automatically pulling it back to its original position when increased torque is not needed, reducing torque. A protective sleeve protects the adjustment component from external damage. Attached Figure Description

[0021] Figure 1 This invention provides a schematic diagram of the structure of a butterfly valve handle torque limiting mechanism; Figure 2 for Figure 1 The diagram shows a partial structure. Figure 3 for Figure 1The diagram shows the structure of the adjustment component. Figure 4 for Figure 3 The enlarged view of point A shown; Figure 5 for Figure 3 The diagram shows a partial structure.

[0022] The following are the labeling elements in the diagram: 1. Valve body; 2. Sealing plate; 3. Adjusting assembly; 301. Threaded ring; 302. Adjusting ring; 303. Moving ring; 304. Locking block; 305. Rubber pad; 306. Limit rail; 307. Insert rod; 308. Limiting plate; 309. Positioning rod; 310. Coil spring; 311. Indicator arrow; 312. Protective sleeve; 313. Anti-slip texture; 314. Fixing ring; 315. Auxiliary block; 316. Annular hole; 317. Ball bearing; 318. Rotating shaft; 4. Gearbox; 5. Valve stem; 6. Turntable. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0024] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0025] Please see Figure 1 The present invention provides a butterfly valve handle torque limiting mechanism, comprising: a valve body 1 and a turntable 6. A sealing plate 2 is installed on the inner wall of the valve body 1. A gear box 4 is fixedly connected to the arc surface of the valve body 1. A valve stem 5 is rotatably connected to the outer wall of the gear box 4. The turntable 6 is fixed to one end of the valve stem 5. An adjustment component 3 is provided on the arc surface of the valve stem 5.

[0026] In an embodiment of the present invention, please refer to Figures 2 to 5The adjusting assembly 3 includes a threaded ring 301, which is sleeved on the arc surface of the rotating shaft 318. One end of the threaded ring 301 away from the turntable 6 is fixedly connected to one side of the outer wall of the gear box 4. An adjusting ring 302 is threadedly connected to the arc surface of the threaded ring 301, and a movable ring 303 is slidably connected to the arc surface of the threaded ring 301. The upper surface of the adjusting ring 302 abuts against the lower surface of the movable ring 303, and the upper surface of the movable ring 303 is fixedly connected to... Several locking blocks 304 are connected, each with a right-angled triangular cross-section. Several ball bearings 317 slide through the arc surface of the threaded ring 301, with the ball bearings 317 corresponding to the inclined surfaces of the locking blocks 304. A fixing ring 314 is fixedly connected to the arc surface of the valve stem 5. An annular hole 316 is opened on the arc surface of the fixing ring 314, and a rubber pad 305 is fixedly connected to the inner wall of the annular hole 316. The rubber pad 305 abuts against the arc surface of the ball bearings 317. By setting the adjustment component 3, when the valve stem 5 is rotated by the turntable 6, the torque can be changed by adjusting the squeezing force of the ball bearings 317 on the rubber pad 305. This prevents damage to the valve stem 5 and other transmission components due to excessive force, and also avoids slow rotation of the valve stem 5 due to insufficient force. A limit rail 306 is fixedly connected to the side of the gear box 4 near the turntable 6. A plug rod 307 is fixedly connected to the arc surface of the movable ring 303, and the plug rod 307 is slidably connected to the limit rail 306. By setting the insertion rod 307 and the limiting rail 306, the position of the movable ring 303 can be limited to prevent position deviation during vertical movement. The arc surface of the insertion rod 307 is threadedly connected to an auxiliary block 315. By setting the auxiliary block 315, rotating the auxiliary block 315 to abut against the limiting rail 306 can fix and limit the insertion rod 307. The lower surface of the adjusting ring 302 has several indicator arrows 311, and the arc surface of the adjusting ring 302 has several anti-slip textures 313. The anti-slip textures 313 make it easier to rotate the adjusting ring 302 and prevent slippage when rotating the adjusting ring 302, which would affect work efficiency. The indicator arrows 311 are convenient to use and remind the user which direction to rotate and adjust the torque. The arc surface of the threaded ring 301 is fixedly connected to several positioning rods 309, and the arc surface of the ball 317 is fixedly connected to a limiting plate 308. The limiting plate 308 is slidably connected to the arc surface of the positioning rods 309. The ball bearing 317 can be limited and fixed to prevent its position from shifting due to the rotation of the turntable 6. A coil spring 310 is sleeved on the arc surface of the positioning rod 309, and the two ends of the coil spring 310 are fixedly connected to the positioning rod 309 and the limiting plate 308, respectively. By setting the coil spring 310, there is a pulling force on the limiting plate 308, which automatically pulls the limiting plate 308 back to its original position when it is not necessary to increase the torque, thereby reducing the torque. A protective sleeve 312 is fixedly connected to the arc surface of the movable ring 303, and the protective sleeve 312 is sleeved on the outside of the threaded ring 301. By setting the protective sleeve 312, the adjusting component 3 can be protected to prevent damage to the adjusting component 3 caused by external factors. The working principle of the butterfly valve handle torque limiting mechanism provided by this invention is as follows: When the adjusting component 3 is needed for adjustment, first loosen the auxiliary block 315 away from the limit rail 306 to release the restriction on the insertion rod 307 and the movable ring 303. Then, adjust the torque according to the user's situation. Rotate the adjusting ring 302 in the direction of the indicator arrow 311. The adjusting ring 302 will move upward along the thread direction of the threaded ring 301, pushing the movable ring 303 upward. Then, the upward movement of the movable ring 303 drives the locking block 304 upward, so that the inclined surface of the locking block applies pressure to the arc surface of the ball 317. Then, the ball 317 squeezes the rubber pad 305, and the rubber pad 305 applies pressure to the fixed ring 314, thereby making the fixed ring 314... Ring 314 presses against valve stem 5 to change torque. Adjustment is made according to actual conditions. Then, turntable 6 is rotated to drive shaft, which in turn drives valve stem 5. Valve stem 5 rotates to drive sealing plate 2. After use, adjusting ring 302 is rotated in the opposite direction to return to the initial position. Moving ring 303 moves downward to drive block 304 to move, relieving pressure on ball 317. Then, coil spring 310 on the arc surface of positioning rod 309 pulls limit plate 308 away from threaded ring 301, so that ball 317 returns to the initial position and torque returns to the initial state. The adjustment is thus completed. The annular hole 316 limits the movement of ball 317. Protective sleeve 312 is provided to protect adjusting component 3 and prevent damage to adjusting component 3 caused by external factors.

[0027] The circuits and controls involved in this invention are all existing technologies and will not be described in detail here.

[0028] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A butterfly valve handle torque limiting mechanism, characterized in that, include: A valve body (1) and a turntable (6) are provided. A sealing plate (2) is installed on the inner wall of the valve body (1). A gear box (4) is fixedly connected to the arc surface of the valve body (1). A valve stem (5) is rotatably connected to the outer wall of the gear box (4). The turntable (6) is fixed to one end of the valve stem (5). An adjustment component (3) is provided on the arc surface of the valve stem (5). The adjustment component (3) includes a threaded ring (301). The threaded ring (301) is sleeved on the arc surface of the rotating shaft (318). The end of the threaded ring (301) away from the turntable (6) is fixedly connected to one side of the outer wall of the gear box (4). An adjustment ring (302) is threadedly connected to the arc surface of the threaded ring (301). The arc surface of the threaded ring (301) is slidably connected to the adjustment ring (302). There is a movable ring (303), the upper surface of the adjusting ring (302) abuts against the lower surface of the movable ring (303), and several locking blocks (304) are fixedly connected to the upper surface of the movable ring (303). The cross section of the locking block (304) is a right triangle. Several balls (317) slide through the arc surface of the threaded ring (301). The balls (317) correspond to the inclined surface of the locking block (304). The arc surface of the valve stem (5) is fixedly connected to a fixing ring (314). The arc surface of the fixing ring (314) is provided with an annular hole (316). The inner wall of the annular hole (316) is fixedly connected to a rubber pad (305). The rubber pad (305) abuts against the arc surface of the balls (317).

2. The butterfly valve handle torque limiting mechanism according to claim 1, characterized in that, The gear box (4) is fixedly connected to a limiting rail (306) on the side near the turntable (6), and the arc surface of the movable ring (303) is fixedly connected to a plug (307), which is slidably connected to the limiting rail (306).

3. The butterfly valve handle torque limiting mechanism according to claim 2, characterized in that, The insert (307) has an auxiliary block (315) threadedly connected to its arc surface.

4. The butterfly valve handle torque limiting mechanism according to claim 1, characterized in that, The lower surface of the adjusting ring (302) is provided with several indicator arrows (311), and the arc surface of the adjusting ring (302) is provided with several anti-slip textures (313).

5. The butterfly valve handle torque limiting mechanism according to claim 1, characterized in that, The arc surface of the threaded ring (301) is fixedly connected to several positioning rods (309), and the arc surface of the ball (317) is fixedly connected to a limiting plate (308). The limiting plate (308) is slidably connected to the arc surface of the positioning rods (309).

6. The butterfly valve handle torque limiting mechanism according to claim 5, characterized in that, The positioning rod (309) has a coil spring (310) sleeved on its arc surface, and the two ends of the coil spring (310) are fixedly connected to the positioning rod (309) and the limiting plate (308) respectively.

7. The butterfly valve handle torque limiting mechanism according to claim 1, characterized in that, The arc surface of the movable ring (303) is fixedly connected to a protective sleeve (312), which is sleeved on the outside of the threaded ring (301).

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