A rotary valve

Abstract

The utility model discloses a kind of rotary piston valves, including valve body, rotary piston valve core, valve stem, rotating shaft, self-locking swing arm and linear displacement unit;Rotary piston valve core rotates in valve body, rotating shaft, valve stem and rotary piston valve core coaxial center synchronous connection;Self-locking swing arm one end fixed rotating shaft, the other end is provided with Y-shaped self-locking hollow groove, Y-shaped self-locking hollow groove is by the main trunk groove, first bifurcated self-locking groove and second bifurcated self-locking groove constitute;Linear displacement unit can be perpendicular to the linear displacement of rotary piston valve core axis under the action of driving device;Linear displacement unit is fixed with floating axle, floating axle is active in Y-shaped self-locking hollow groove;When floating axle is in first bifurcated self-locking groove, valve body is unobstructed;When floating axle is in second bifurcated self-locking groove, valve body is closed;Solved the problem of accidental action caused by external force of traditional valve.

Description

Technical Field

[0001] This utility model belongs to the field of valves. Background Technology

[0002] In the field of fluid control, the rotary cone valve is a key component that opens or closes the flow channel by rotating the valve core. In existing technologies, rotary cone valves mostly use an electric motor or hydraulic motor to directly drive the valve stem, which in turn drives the valve core to rotate. This direct drive method has several inherent drawbacks: First, under high pressure, high flow rate, or vibration conditions, fluid impact force or external vibration can easily be transmitted to the valve core, causing the valve core to undergo unexpected slight rotation or displacement, leading to seal failure and insufficient reliability.

[0003] Secondly, in order to maintain the valve position, the traditional drive mechanism requires the drive motor to be continuously powered or to rely on a complex hydraulic pressure-holding circuit. This not only increases energy consumption, but also poses a safety risk of valve loss of control due to power failure or hydraulic leakage.

[0004] Furthermore, while some valves employ self-locking mechanisms such as worm gears, these mechanisms suffer from low transmission efficiency, are prone to wear, and may "skip teeth" and lose their self-locking function under strong impacts. Therefore, the market urgently needs a rotary cone valve solution that is simple in structure, reliable in self-locking, has strong anti-interference capabilities, and provides precise control. Summary of the Invention

[0005] Purpose of the invention: In order to overcome the shortcomings of the existing technology, this utility model provides a rotary cone valve, which solves the problem of unexpected operation of traditional valves caused by external forces.

[0006] Technical solution: To achieve the above objectives, this utility model provides a rotary cone valve, comprising a valve body, a rotary cone valve core, a valve stem, a rotating shaft, a self-locking rocker arm, and a linear displacement unit; The rotary cone valve core rotates within the valve body, and the rotating shaft, valve stem, and rotary cone valve core are coaxially and synchronously connected; one end of the self-locking swing arm is fixed to the rotating shaft, and the other end is provided with a Y-shaped self-locking slot, which is composed of an interconnected main slot, a first branch self-locking slot, and a second branch self-locking slot; The linear displacement unit can make linear displacement perpendicular to the axis of the rotary cone valve core under the action of the drive device; a floating shaft is fixed on the linear displacement unit, and the floating shaft moves in the Y-shaped self-locking slot; when the floating shaft is in the first bifurcated self-locking slot, the valve body is unobstructed; when the floating shaft is in the second bifurcated self-locking slot, the valve body is closed.

[0007] Furthermore, a slip ring is coaxially rotatably sleeved on the outside of the floating shaft, and the outer diameter of the slip ring is adapted to the groove width of the main groove, the first branch self-locking groove and the second branch self-locking groove.

[0008] Furthermore, the inner walls of the ends of the first and second bifurcated self-locking grooves are respectively provided with a first pressure sensor and a second pressure sensor.

[0009] Furthermore, the extension direction of the main groove is parallel to the extension direction of the self-locking swing arm; the first and second bifurcated self-locking grooves are symmetrical with respect to the centerline of the main groove.

[0010] Furthermore, the linear displacement unit is a lead screw and slider; it also includes a lead screw and a guide rod that cooperate with the lead screw and slider; the lead screw and guide rod are installed in the transmission housing, and the rotation input end of the lead screw extends out of the transmission housing.

[0011] Furthermore, the rotating shaft and valve stem are synchronously rotated and engaged through a hexagonal shaft and a hexagonal hole, a structure that allows for relative axial displacement between the rotating shaft and valve stem.

[0012] Furthermore, based on the initial state, the linear displacement unit can shift laterally to the right along the floating axis and slide into the main channel.

[0013] Beneficial effects: The combination structure of the "self-locking swing arm" and "Y-shaped self-locking hollow groove" of this utility model drives the floating shaft to move in the Y-shaped groove through a linear displacement unit, thereby achieving decoupling of valve core rotation and linear motion.

[0014] True bistable self-locking is achieved: when the floating shaft engages in the first bifurcated self-locking groove (open valve position) or the second bifurcated self-locking groove (closed valve position), the self-locking swing arm is rigidly constrained by the floating shaft in both clockwise and counterclockwise rotational directions, forming a purely mechanical self-locking mechanism. This mechanical structure alone can withstand fluid pressure and external vibrations, ensuring absolute stability of the valve in both open and closed positions, fundamentally solving the problem of unexpected operation caused by external forces in traditional valves.

[0015] Pressure sensors were introduced as a valve position detection method: pressure sensors were installed at the ends of the first and second bifurcated self-locking grooves. When the floating shaft reaches and presses against the groove end through the slip ring, the sensor immediately sends a signal, and the control system can then accurately stop the drive motor. This not only achieves precise valve position control and avoids the risk of motor burnout due to stalling, but also provides an interface for remote valve status monitoring and automated integration.

[0016] A unique anti-interference stroke is designed: the "main groove" section of the Y-shaped groove forms a non-sensitive zone. When the drive mechanism is slightly disturbed, the valve core position will not change as long as the floating shaft has not completely slid out of the bifurcated self-locking groove and into the main groove. This design greatly improves the valve's anti-interference capability in a stable state, enabling it to adapt to more demanding industrial environments.

[0017] The linear motion is converted into rotational motion, resulting in a clear transmission path and high efficiency. The use of a lead screw and slider as the linear displacement unit provides inherent self-locking properties and forms a double safety mechanism with the swing arm mechanism.

[0018] Several structural optimizations have been made: the rotatable slip ring set outside the floating shaft effectively converts sliding friction into rolling friction, reducing wear and jamming risks; the rotating shaft and valve stem adopt a hexagonal shaft hole fit, which allows axial floating while transmitting torque, compensating for installation errors and ensuring the flexibility of the mechanism's movement. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of the entire scheme; Figure 2 for Figure 1 A-direction view; Figure 3 This is a schematic diagram of a self-locking swing arm structure. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] As Figures 1 to 3 The rotary cone valve shown includes a valve body 12, a rotary cone valve core 14, a valve stem 10, a rotating shaft 7, a self-locking swing arm 6, and a linear displacement unit 140. The rotary cone valve core 14 is rotatably fitted in the valve body 12, and the rotating shaft 7, valve stem 10, and rotary cone valve core 14 are coaxially and synchronously connected. One end of the self-locking swing arm 6 is fixedly connected to the rotating shaft 7, and the other end is provided with a Y-shaped self-locking slot 3. The Y-shaped self-locking slot 3 is composed of a main slot 3a, a first branch self-locking slot 3b, and a second branch self-locking slot 3c that are interconnected. The linear displacement unit 140 can make linear displacement in a direction perpendicular to the axis of the rotary cone valve core 14 under the action of a driving device. A floating shaft 5 is fixedly provided on the linear displacement unit 140, and the floating shaft 5 moves in the Y-shaped self-locking slot 3.

[0022] When the floating shaft 5 is in the first bifurcated self-locking groove 3b, the liquid guiding channel 11 in the valve body 12 is aligned and connected with the valve hole 13 on the rotary cone valve core 14, so that the valve body 12 is unobstructed.

[0023] When the floating shaft 5 is in the second bifurcated self-locking groove 3c, the liquid guiding channel 11 in the valve body 12 is perpendicularly offset from the valve hole 13 on the rotary cone valve core 14, thus closing the valve body 12.

[0024] A slip ring 2 is coaxially mounted on the outer side of the floating shaft 5. The outer diameter of the slip ring 2 is adapted to the groove width of the main groove 3a, the first branch self-locking groove 3b, and the second branch self-locking groove 3c. The slip ring 2 is made of polytetrafluoroethylene or copper-based self-lubricating material, which effectively reduces friction with the groove wall and ensures smooth movement of the floating shaft 5.

[0025] The inner walls of the ends of the first bifurcated self-locking groove 3b and the second bifurcated self-locking groove 3c are respectively provided with a first pressure sensor 19a and a second pressure sensor 19b. The first pressure sensor 19a and the second pressure sensor 19b are piezoelectric sensors with a range of 0-100N. They are used to detect the collision pressure of the slip ring 2, provide valve position feedback signals, and ensure that the valve is in place. The sensor signals can be connected to the control system to realize automated operation.

[0026] The extension direction of the main groove 3a is parallel to the extension direction of the self-locking swing arm 6; the first branch self-locking groove 3b and the second branch self-locking groove 3c are symmetrical about the center line of the main groove 3a.

[0027] The linear displacement unit 140 is a lead screw and slider; it also includes a lead screw 4 and a guide rod 8 that cooperate with the lead screw and slider; the lead screw 4 and the guide rod 8 are installed in the transmission housing 9, and the rotation input end 1 of the lead screw 4 extends out of the transmission housing 9 for connecting to an external motor or hydraulic motor.

[0028] The rotating shaft 7 and valve stem 10 are synchronously rotated and engaged via a hexagonal shaft and a hexagonal hole. This structure allows for relative axial displacement between the rotating shaft 7 and valve stem 10. Both the rotating shaft 7 and valve stem 10 are made of stainless steel. The hexagonal engagement structure allows for axial floating, compensates for installation errors, and prevents jamming. The valve body 12 and the rotating cone valve core 14 are made of stainless steel or hard alloy, with a pressure rating of PN16, suitable for high-pressure fluid control.

[0029] Working principle: In the initial state, the floating shaft 5 is locked in the first bifurcated self-locking groove 3b, and the liquid guiding channel 11 in the valve body 12 is aligned and connected with the valve hole 13 on the rotary cone valve core 14, so that the valve body 12 is in a smooth state. When the screw 4 does not rotate, the floating shaft 5 is in a fixed state. The floating shaft 5 locked in the first bifurcated self-locking groove 3b plays the role of locking the self-locking swing arm 6. At this time, the self-locking swing arm 6 is completely constrained by the floating shaft 5 whether it swings clockwise or counterclockwise, so as to achieve the purpose of the rotary cone valve core 14 rotating spontaneously. This self-locking mechanism is based on the geometric design of the Y-shaped groove. The ends of the first bifurcated self-locking groove 3b and the second bifurcated self-locking groove 3c are arc-shaped and form a surface contact with the slip ring 2. Under fluid pressure or vibration, the valve position can still be kept stable, avoiding the accidental opening or closing of traditional valves due to external forces.

[0030] Meanwhile, even if the lead screw 4 rotates slightly due to external disturbances, causing the linear displacement unit 140 to shift slightly to the right along with the floating shaft 5, as long as the stroke of the floating shaft 5 does not slip into the main groove 3a, the self-locking swing arm 6 will not be linked and will maintain its original position, thus improving the stability of the valve in the open state. This design enhances the valve's anti-interference capability and is suitable for harsh environments such as chemical and water conservancy industries; the floating shaft 5 is made of bearing steel with surface hardening treatment, resulting in good wear resistance and a long service life.

[0031] When the valve needs to be closed, the motor drives the lead screw 4 to rotate continuously in the forward direction, thereby causing the linear displacement unit 140 and the floating shaft 5 to shift laterally to the left until the floating shaft 5 slides into the main channel 3a to the right. The floating shaft 5, which has shifted to the left, begins to apply a rightward thrust to the self-locking swing arm 6, thereby driving the locking self-locking swing arm 6 to rotate clockwise around the rotating shaft 7. At the same time, the floating shaft 5 adapts to the movement in the main channel 3a, thereby causing the rotary cone valve core 14 to gradually close.

[0032] As the floating shaft 5 continues to shift to the right, it eventually slides out of the main groove 3a into the second bifurcation self-locking groove 3c. When the second pressure sensor 19b senses the impact pressure from the slip ring 2, it indicates that the floating shaft 5 is fully engaged in the second bifurcation self-locking groove 3c. At this point, the screw motor is immediately stopped to prevent it from burning out due to stalling. At this time, the liquid guiding channel 11 in the valve body 12 is perpendicularly offset from the valve hole 13 on the rotary cone valve core 14. The valve body 12 enters a stable closed state. When the screw 4 is not rotating, the floating shaft 5 is in a fixed state. The floating shaft 5, engaged in the second bifurcation self-locking groove 3c, acts as a lock for the self-locking swing arm 6. At this time, the self-locking swing arm 6 is completely constrained by the floating shaft 5 regardless of whether it swings clockwise or counterclockwise, thus achieving the purpose of the rotary cone valve core 14 rotating spontaneously. The introduction of the pressure sensor enables accurate detection of the valve position. Combined with the control system, it enables remote monitoring and intelligent management of the valve. The entire working principle demonstrates how to solve the problem of poor stability of traditional valves by combining mechanical self-locking and electronic control.

[0033] Similarly, when the valve needs to be opened, the motor drives the lead screw 4 to rotate continuously in the opposite direction until the first pressure sensor 19a senses the impact pressure from the slip ring 2, at which point the lead screw motor immediately stops and returns to the initial state. This process is symmetrical and reliable, with high repeatability, and is suitable for frequent operation. Compared with the prior art, this invention has a simple structure, low cost, and higher safety and durability.

[0034] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A rotary cone valve, characterized in that: It includes a valve body (12), a rotary cone valve core (14), a valve stem (10), a rotating shaft (7), a self-locking swing arm (6), and a linear displacement unit (140); the rotary cone valve core (14) rotates in the valve body (12), and the rotating shaft (7), the valve stem (10), and the rotary cone valve core (14) are coaxial and synchronized; one end of the self-locking swing arm (6) is fixed to the rotating shaft (7), and the other end has a Y-shaped self-locking slot (3), which is composed of a main slot (3a), a first branch self-locking slot (3b), and a second branch self-locking slot (3c) that are interconnected; The linear displacement unit (140) can make linear displacement in the direction perpendicular to the axis of the rotary cone valve core (14); a floating shaft (5) is fixed on the linear displacement unit (140), and the floating shaft (5) moves in the Y-shaped self-locking slot (3); when the floating shaft (5) is in the first bifurcated self-locking slot (3b), the valve body (12) is open; when the floating shaft (5) is in the second bifurcated self-locking slot (3c), the valve body (12) is closed.

2. The rotary cone valve according to claim 1, characterized in that: The floating shaft (5) is coaxially fitted with a slip ring (2), the outer diameter of which is adapted to the groove width of the main groove (3a), the first branch self-locking groove (3b) and the second branch self-locking groove (3c).

3. A rotary cone valve according to claim 1, characterized in that: The first pressure sensor (19a) and the second pressure sensor (19b) are respectively provided on the inner walls of the ends of the first bifurcated self-locking groove (3b) and the second bifurcated self-locking groove (3c).

4. A rotary cone valve according to claim 2, characterized in that: The extension direction of the main groove (3a) is parallel to the extension direction of the self-locking swing arm (6); the first branch self-locking groove (3b) and the second branch self-locking groove (3c) are symmetrical with respect to the centerline of the main groove (3a).

5. A rotary cone valve according to claim 1, characterized in that: The linear displacement unit (140) is a lead screw and slider; it also includes a lead screw (4) and a guide rod (8) that cooperate with the lead screw and slider; the lead screw (4) and the guide rod (8) are installed in the transmission housing (9), and the rotation input end (1) of the lead screw (4) extends out of the transmission housing (9).

6. A rotary cone valve according to claim 1, characterized in that: The rotating shaft (7) and the valve stem (10) are synchronously rotated and engaged through a hexagonal shaft and a hexagonal hole. This structure allows the rotating shaft (7) and the valve stem (10) to undergo relative axial displacement.

7. A rotary cone valve according to claim 1, characterized in that: Based on the initial state, the linear displacement unit (140) can move laterally to the right with the floating shaft (5) and slide into the main channel (3a).

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