A high sealing dynamic regulating ball valve

Abstract

The application relates to the technical field of industrial valves, and discloses a high-sealing-performance dynamic adjustment ball valve, which comprises a valve body, a valve ball and a valve rod, the valve rod is located at the top end of the valve body and is connected with the valve ball, a medium channel is located in the valve body, further comprising: a sealing seat assembly arranged on both sides of the valve ball and matched with the valve ball to realize sealing, the sealing seat assembly comprises an elastic pre-tightening element and a sealing element, the elastic pre-tightening element applies a pre-tightening force to the sealing element along the axial direction of the medium channel, a pressure guide channel is connected between the medium channel and the sealing seat assembly, and a driving mechanism is installed on the valve rod and is in transmission connection with the sealing seat assembly.

Description

Technical Field

[0001] This invention relates to the field of fluid control valve technology, and more specifically, to a high-sealing dynamic regulating ball valve. Background Technology

[0002] Ball valves are widely used in industries such as petroleum, chemical, and long-distance pipelines due to their advantages of low flow resistance and rapid opening and closing. However, in practical applications, especially in high-pressure, high-frequency operating conditions, a significant technical contradiction exists between the sealing performance and service life of ball valves, mainly manifested in the following aspects: (1) The contradiction between high sealing performance and low operating torque. To ensure zero leakage under high-pressure conditions, existing fixed ball valves or floating ball valves typically rely on springs or medium pressure to maintain a continuous high specific pressure contact between the valve seat and the ball. This high specific pressure state exists throughout the entire opening and closing stroke of the valve, causing the sealing surface to experience severe friction during the rotation of the ball. This not only significantly increases the valve's opening and closing torque and the load on the actuator, but also leads to rapid wear of the sealing material and shortens the valve's service life.

[0003] (2) Limitations of existing self-sealing structures. Self-sealing using medium pressure (i.e., "piston effect") is a common method in existing technology. Although it improves the sealing reliability in the closed state, at the moment the valve is opened, the high-pressure medium still acts on the back of the valve seat, hindering the valve seat from retracting, resulting in a sharp increase in opening resistance, which can easily cause the sealing surface to be scratched or seized.

[0004] (3) The location of spherical wear is uncontrollable. The medium often contains particulate impurities, which can easily scratch the spherical surface during the rotation of the ball. In the prior art, if the scratches extend to the critical sealing contact zone, it will directly lead to internal leakage failure of the valve. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention discloses a high-sealing dynamic regulating ball valve, solving the technical problem that existing ball valves struggle to simultaneously achieve high sealing reliability, low opening and closing torque, and low wear under high-pressure conditions. It includes a valve body and a valve ball, with a valve stem located at the top of the valve body and connected to the valve ball. A medium passage is located within the valve body. The valve body also includes sealing seat assemblies arranged on both sides of the valve ball and cooperating with it to achieve a seal. The sealing seat assembly includes an elastic pre-tightening element and a sealing element. The elastic pre-tightening element applies a pre-tightening force to the sealing element along the axial direction of the medium passage. A pressure guiding channel connects the medium passage and the sealing seat assembly. A drive mechanism, which is kinetically connected to the sealing seat assembly, is mounted on the valve stem.

[0006] Furthermore, the surface of the valve ball is provided with a sliding trajectory area and a sealing area. Both the sliding trajectory area and the sealing area are located at the end of the valve ball near the sealing seat assembly and are arranged sequentially along the medium flow direction. Both the sliding trajectory area and the sealing area are annular strip-shaped areas and are arranged adjacent to each other along the circumference of the valve ball.

[0007] Furthermore, the sliding trajectory area is an annular convex band and / or annular groove band, the sealing area is a smooth spherical area, and the surface roughness of the sealing area is less than or equal to the surface roughness of the sliding trajectory area.

[0008] Furthermore, the sealing seat assembly includes a sealing valve seat, an elastic preload element, and a seal mounted on the sealing valve seat. The valve body is provided with a valve seat mounting hole to facilitate the installation of the sealing valve seat. The inner side of the sealing valve seat is formed with an annular sealing mating surface adapted to the valve ball. The seal is arranged in an annular shape and is located at the end of the sealing valve seat near the valve ball.

[0009] Furthermore, the end of the sealing valve seat away from the valve ball forms an annular pressure-conducting chamber that communicates with the pressure-conducting channel.

[0010] Furthermore, the elastic preload element is a disc spring assembly or a wave spring.

[0011] Furthermore, the drive mechanism includes a cam element fixedly sleeved on the valve stem, and a force transmission member that cooperates with the cam element and slides axially along the medium channel. The force transmission member is connected to the seal.

[0012] Furthermore, it also includes a sensing and monitoring component configured to be signal-connected to an external controller, and the sensing and monitoring component includes: a pressure detection unit disposed at the pressure guide channel or the sealing seat assembly for real-time monitoring of the medium pressure signal at the sealing seat assembly; and / or, a displacement detection unit disposed at the valve stem or the drive mechanism for real-time monitoring of the rotation angle of the valve stem or the axial displacement of the sealing seat assembly.

[0013] Furthermore, the sensing and monitoring component is configured to execute in-situ pulse self-cleaning maintenance logic to prevent blockage of the pressure guiding channel and the annular pressure guiding chamber; The in-situ pulse self-cleaning maintenance logic is configured as follows: when the valve ball remains stationary, the drive mechanism is controlled to drive the sealing seat assembly to perform axial reciprocating micro-movements with a preset frequency and amplitude. By using the axial reciprocating micro-motion of the sealing seat assembly to continuously and alternately compress and expand the volume of the annular pressure guiding chamber, high-frequency fluid pulse disturbance is induced in the annular pressure guiding chamber. The fluid pulse disturbance is used to force particulate impurities deposited at the bottom of the annular pressure guiding chamber and in the pressure guiding channel to be suspended and discharged with the medium exchange.

[0014] Furthermore, the sensing and monitoring component is configured to perform seal wear quantification and life prediction logic; The logic configuration for quantifying seal wear and predicting life is as follows: establish a linear physical mapping relationship between the static axial extension of the sealing seat assembly and the remaining thickness of the seal. When the valve is fully closed and the drive mechanism is unloaded, the displacement detection unit collects the real-time static axial extension of the sealing seat assembly relative to the valve body. Based on the mechanical characteristics of the elastic preload element that automatically compensates for wear gaps, the increment of the real-time static axial extension relative to the initial reference value is calculated, and the increment is converted into the cumulative wear depth data of the seal and output.

[0015] Furthermore, the sensing and monitoring component is configured to execute fluid-structure interaction (FSI) verification logic to prevent malfunctions caused by mechanical jamming. The logic for verifying the authenticity of the fluid-structure interaction action is configured as follows: within a preset monitoring window when the driving mechanism performs the retraction action of the sealing seat assembly, the displacement signal of the displacement detection unit and the pressure signal of the pressure detection unit are compared synchronously. Only when the pressure detection unit captures the characteristic negative pressure pulse or pressure drop waveform generated by the instantaneous increase in volume in the annular pressure guiding chamber, it is determined that the sealing seat assembly has actually performed a physical retraction action; if a displacement change is detected but no corresponding pressure characteristic waveform is detected, it is determined that the sealing seat assembly is in a transmission failure or mechanical misalignment state, and a safety interlock is triggered to prevent the valve stem from rotating.

[0016] Furthermore, the sensing and monitoring component is configured to execute mechanical transmission integrity verification logic to prevent damage to the seal due to mechanical jamming preventing the sealing seat assembly from performing a retraction action; The mechanical transmission integrity verification logic is configured as follows: during the stroke of the drive mechanism driving the sealing seat assembly, the sensing and monitoring component synchronously collects the displacement change signal fed back by the displacement detection unit and the pressure change signal fed back by the pressure detection unit, and based on the principle of fluid volume change, by comparing the time synchronization of the pressure change signal and the displacement change signal, it determines whether the sealing seat assembly has performed a real physical retreat action.

[0017] Furthermore, the specific determination strategy of the mechanical transmission integrity verification logic is configured as follows: Within the monitoring window during which the valve stem opens and the drive mechanism drives the sealing seat assembly to move away from the valve ball, the pressure detection unit determines that the transmission chain of the sealing seat assembly is complete and its operation is effective only when it captures the characteristic pressure drop waveform generated by the instantaneous expansion of the volume in the annular pressure guiding chamber. If the displacement detection unit detects the displacement change signal, but the pressure detection unit does not capture the characteristic pressure drop waveform within the monitoring window, then the sealing seat assembly is determined to be in a jamming failure or mechanical misalignment state.

[0018] Furthermore, the sensing and monitoring component is also equipped with an anti-shear safety interlock control strategy; The anti-shear safety interlock control strategy is configured as follows: when the sealing seat assembly is determined to be in a jamming failure or mechanical misalignment state, the sensing and monitoring component immediately sends a stop command to the external controller to forcibly lock the valve stem to prevent it from continuing to rotate, thereby preventing the valve ball from forcibly rotating and shearing damage to the seal under high specific pressure conditions where the sealing seat assembly has not effectively retreated.

[0019] Compared with the prior art, the present invention has the following advantages: This invention provides a high-sealing dynamic regulating ball valve. By setting a drive mechanism on the valve stem and linking it with the sealing seat assembly, during the rotation of the valve ball, the drive mechanism forces the sealing seat assembly to overcome the preload and retract, so that a micro-gap or low specific pressure contact is formed between the seal and the valve ball, which significantly reduces the opening and closing torque and frictional wear. When the valve is closed, the drive mechanism is released, and in conjunction with the medium pressure introduced by the pressure guiding channel and the elastic force of the elastic preload element, a self-reinforcing seal under high pressure is achieved.

[0020] This invention provides a high-sealing dynamic regulating ball valve. By setting a sliding trajectory area and a sealing area on the surface of the valve ball, the wear area during valve operation and the sealing area during closure are spatially separated. During opening and closing, the seal mainly contacts the sliding trajectory area, while during closure it contacts the sealing area with lower surface roughness. This effectively avoids scratches during opening and closing that could affect the final shut-off sealing performance, thus extending the valve's service life.

[0021] This invention provides a high-sealing dynamic regulating ball valve. The synergistic effect of mechanical retraction and spherical zoning, along with the forced retraction action provided by the drive mechanism, is a prerequisite for implementing a sliding trajectory zone design on the valve ball surface. This invention utilizes the drive mechanism to keep the seal in a suspended or micro-contact state when passing through the sliding trajectory zone, thus avoiding potential damage to the seal from the sacrificial band.

[0022] This invention constructs a motion authenticity verification system based on fluid-structure interaction. It utilizes the characteristic negative pressure waveform generated by the expansion of the pressure-conducting chamber volume when the sealing seat retracts to accurately identify mechanical jamming or transmission misalignment. Combined with an anti-shear safety interlock strategy, it can force a stop within a millisecond window at the initial stage of valve stem rotation, avoiding the risk of the seal being forcibly sheared and failing due to the sealing seat sticking and not retracting.

[0023] This invention possesses intelligent full life-cycle health monitoring capabilities. By establishing a historical database of waveform characteristics and trend analysis algorithms, it can dynamically quantify and assess the degree of blockage in the pressure guiding channel and the wear status of the seals, and automatically calibrate the judgment logic based on the viscosity of the medium. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of a high-sealing dynamic regulating ball valve structure disclosed in this invention; Figure 2 This is a three-dimensional view of the valve ball in a high-sealing dynamic regulating ball valve disclosed in this invention.

[0026] In the diagram: 10. Valve body; 11. Valve ball; 12. Valve stem; 13. Medium passage; 14. Sealing seat assembly; 15. Elastic preload element; 16. Pressure guiding passage; 17. Drive mechanism; 18. Sealing valve seat; 19. Seal; 20. Annular pressure guiding chamber; 22. Sliding trajectory area; 23. Sealing area; 24. Cam component; 25. Force transmission component. Detailed Implementation

[0027] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Example 1: As Figure 1 As shown, this embodiment discloses a high-sealing dynamic regulating ball valve, which mainly includes a valve body 10, a valve ball 11, a valve stem 12, and a sealing seat assembly 14.

[0029] The valve body 10 has a through medium channel 13 inside, and the valve ball 11 is rotatably installed in the inner cavity of the valve body 10 to connect or disconnect the medium channel 13. One end of the valve stem 12 extends out of the top of the valve body 10 and is connected to an external actuator (not shown in the figure), and the other end is connected to the valve ball 11. The valve ball 11 is driven to rotate by rotating the valve stem 12.

[0030] The sealing seat assembly 14 is symmetrically arranged on both sides of the valve ball 11 to achieve bidirectional sealing of the valve. Figure 2As shown, the sealing seat assembly 14 specifically includes a sealing valve seat 18, a sealing element 19, and an elastic preload element 15. A valve seat mounting hole is provided inside the valve body 10, and the sealing valve seat 18 is slidably installed in this mounting hole along the axial direction of the medium channel 13. The inner side of the sealing valve seat 18 is formed with an annular sealing mating surface adapted to the spherical curvature of the valve ball 11. The sealing element 19 is annular and fixedly embedded in the end of the sealing valve seat 18 near the valve ball 11. The sealing element 19 can be made of polyetheretherketone (PEEK), polytetrafluoroethylene (PTFE), or a metal hard sealing material. The elastic preload element 15 (in this embodiment, a disc spring assembly or a wave spring) is disposed between the sealing valve seat 18 and the valve body 10 to provide an initial axial preload force to the sealing valve seat 18, causing the sealing element 19 to maintain its contact with the valve ball 11.

[0031] The end of the sealing valve seat 18 away from the valve ball 11 forms an annular pressure-conducting chamber 20 with the valve body 10. A pressure-conducting channel 16 is provided inside the valve body 10. One end of this channel 16 connects to the medium channel 13 (usually the upstream high-pressure side of the valve), and the other end connects to the annular pressure-conducting chamber 20. When the valve is closed, the medium enters the annular pressure-conducting chamber 20 through the pressure-conducting channel 16, using fluid pressure to push the sealing valve seat 18 towards the valve ball 11, thereby increasing the sealing specific pressure and achieving self-pressurizing sealing.

[0032] To reduce wear and torque during opening and closing, a drive mechanism 17 is mounted on the valve stem 12. The drive mechanism 17 includes a cam member 24 fixedly sleeved on the valve stem 12, and a force transmission member 25 (such as a push rod or slider) slidably disposed within the valve body 10 along the medium passage 13. One end of the force transmission member 25 abuts against the outer contour surface of the cam member 24, and the other end extends to the sealing seat assembly 14 and connects to or abuts against the sealing valve seat 18.

[0033] The operating principle of this embodiment is as follows: When the valve stem 12 drives the valve ball 11 to start rotating (i.e., the opening or closing process), the cam 24 rotates accordingly, and its convex profile pushes the force transmission member 25 to move axially. The force transmission member 25 overcomes the elastic force of the elastic pre-tightening element 15 and the medium pressure, forcibly pushing the sealing valve seat 18 to move slightly away from the valve ball 11 (e.g., 0.2mm~0.5mm), so that a micro-gap or low specific pressure contact is formed between the sealing element 19 and the valve ball 11, thereby significantly reducing the frictional torque. When the valve stem 12 rotates to the fully closed position, the cam 24 rotates to the release position (base circle section), the force transmission member 25 is unloaded, and the sealing valve seat 18 is reset under the combined action of the elastic pre-tightening element 15 and the medium pressure in the annular pressure guiding chamber 20, tightly pressing against the surface of the valve ball 11 to ensure high-pressure sealing.

[0034] like Figure 2As shown, to further optimize wear resistance, the surface of the valve ball 11 in this embodiment is designed with partitions. A sliding trajectory area 22 and a sealing area 23 are provided at one end of the valve ball 11 near the sealing seat assembly 14. Both the sliding trajectory area 22 and the sealing area 23 are annular strip-shaped areas distributed circumferentially along the valve ball 11. Specifically, the sealing area 23 corresponds to the spherical area contacted by the seal 19 when the valve is in the fully closed position; this area is machined into a high-precision smooth spherical surface. The sliding trajectory area 22 corresponds to the spherical area through which the seal 19 slides during the valve's opening or closing rotation. In this embodiment, the surface roughness of the sliding trajectory area 22 is greater than that of the sealing area 23, or an annular convex band or groove band is provided in the sliding trajectory area 22. Due to the action of the drive mechanism 17, the seal 19 is in a retracted state when it slides through the sliding track area 22. Even if there are slight scratches left by the medium scouring in the sliding track area 22, when the valve is finally closed, the seal 19 has slid into the smooth sealing area 23 and established a seal there. Therefore, the surface condition of the sliding track area 22 will not affect the final sealing performance.

[0035] It is important to note that the sliding trajectory area 22 and the drive mechanism 17 in this embodiment are inextricably linked. Without the axial retraction action (e.g., 0.2mm~0.5mm) provided by the drive mechanism 17, the seal 19 would be forced to slide across the sliding trajectory area 22, which has raised strips or high roughness, under high specific pressure, easily resulting in shear damage or severe wear, leading to system failure. Therefore, the retraction action of the drive mechanism 17 is a prerequisite for the implementation of the sliding trajectory area 22 (sacrificial strip), and the two together constitute a complete long-life sealing protection system.

[0036] Example 2: Based on Example 1, it further includes a sensing and monitoring component. The sensing and monitoring component is configured to be connected to an external controller signal, and includes: a pressure detection unit disposed at the pressure guiding channel 16 or the sealing seat assembly 14, for real-time monitoring of the medium pressure signal at the sealing seat assembly 14; and / or, a displacement detection unit disposed at the valve stem 12 or the drive mechanism 17, for real-time monitoring of the rotation angle of the valve stem 12 or the axial displacement of the sealing seat assembly 14.

[0037] Example 3: In practical industrial applications, valves often need to handle media that are high-temperature, high-viscosity, prone to coking, or contain solid particles. When the valve is in a closed state for a long time, heavy components or impurities in the media are prone to deposit in the annular pressure-conducting chamber 20 on the back of the sealing seat assembly 14, or penetrate into the mating gap between the sealing valve seat 18 and the valve body 10, forming high-strength physical adhesion or chemical coking. This abnormal working condition will cause the static friction force of the sealing seat assembly 14 to increase sharply. When the external control system issues a valve opening command, the drive mechanism 17 (including the valve stem 12, cam 24, and force transmission component 25) can overcome its own mechanical resistance and start to perform the action, and the displacement detection unit will also provide feedback on the action execution signal. However, the sealing seat assembly 14 located at the end of the transmission chain may not move at all due to the above-mentioned excessive adhesion force, and will not produce the axial retraction displacement expected in the design. At this point, if the valve stem 12 continues to drive the valve ball 11 to rotate, the sharp edge of the flow channel of the valve ball 11 will forcibly cut the seal 19 under the high specific pressure condition where the sealing seat assembly 14 has not retreated, instantly causing the seal to fail and even triggering a safety accident of media leakage. In order to effectively eliminate this monitoring blind spot, the sensing and monitoring component in this embodiment is configured to execute verification logic based on the physical characteristics of fluid-structure interaction.

[0038] Specifically, the annular pressure-conducting chamber 20 on the back of the sealing seat assembly 14 forms a relatively closed hydraulic volume system at the initial moment of valve operation (i.e., before the main medium channel is connected). This system is only connected to the upstream high-pressure side through the slender pressure-conducting channel 16. When the drive mechanism 17 operates normally and pushes the sealing valve seat 18 away from the valve ball 11, the geometric volume of the annular pressure-conducting chamber 20 undergoes forced expansion in a very short time. Due to the incompressibility of the liquid medium and the objective flow resistance hysteresis effect of the pressure-conducting channel 16 on the supplementary flow of the medium (especially for high-viscosity media), the instantaneous expansion of the volume will cause a transient decrease in the density of the medium in the chamber, thereby inducing a characteristic negative pressure pulse or pressure drop waveform. Conversely, if the sealing seat assembly 14 is stuck and does not move, the chamber volume will not change regardless of the movement of the drive end, and this characteristic waveform will not appear. Based on this, the sensing and monitoring component can accurately determine whether the mechanical transmission chain is complete and effective by capturing this fluid characteristic.

[0039] The specific execution process of this verification logic includes: when the valve is stationary, the sensing and monitoring component controls the pressure detection unit to continuously acquire the background pressure signal within the pressure guide channel 16 in a low-frequency mode. The adaptive filtering algorithm integrated within the system analyzes the background noise in the pipeline in real time (such as that caused by pump vibration or fluid turbulence), calculates the current static reference pressure value P0 and the amplitude range of the background noise. The system automatically adjusts the sensitivity parameters in the verification logic based on the temperature of the medium (obtained through auxiliary sensors or preset) and the current pressure P0. For example, under high-pressure conditions, due to the influence of the fluid bulk modulus, the same volume expansion will cause a larger pressure drop, and the system will automatically increase the judgment threshold to prevent false alarms; while under low-temperature, high-viscosity conditions, the fluid refill speed is slower, and the pressure drop waveform is wider, and the system will automatically extend the duration of the subsequent monitoring window. This environmental awareness ensures the robustness of the verification logic under different seasons and operating conditions.

[0040] Secondly, to accurately capture transient fluid waveforms and eliminate irrelevant interference, the sensing and monitoring components establish a precise time-gating mechanism. When the displacement detection unit detects the instant the valve stem 12 or drive mechanism 17 begins to move (e.g., an angle exceeding 0.1 degrees), the system immediately locks a preset monitoring window. The duration of this window is limited to the theoretical stroke time of the drive mechanism 17 performing the sealing seat retraction action, typically only the first few hundred milliseconds of the valve opening process. Within this window, the sensing and monitoring components force the pressure detection unit into a high-frequency sampling mode (e.g., a sampling frequency of no less than 1000Hz) to record pressure change details. Simultaneously, the system timestamps the displacement and pressure signals to ensure strict temporal synchronization between the two signals.

[0041] Within the locked monitoring window, the central processing unit performs real-time differential analysis and waveform feature matching on the acquired pressure data stream. The system searches for pressure drop events that simultaneously meet three criteria: First, the instantaneous pressure drop relative to the static reference pressure value P0 must exceed a preset signal-to-noise ratio threshold (e.g., more than three times the background noise amplitude) to ensure signal validity; second, the pressure drop must lag behind the displacement initiation time by a fixed system delay (determined by the mechanical transmission clearance), and the waveform's falling edge slope must be sufficiently steep to conform to the hard characteristics of mechanical forced expansion; third, the waveform should exhibit a "V" or "U" shaped characteristic, first a sharp drop followed by a slow recovery as the medium refills. If the system successfully extracts a pressure waveform that meets all the above characteristics within the monitoring window, and the displacement detection unit synchronously feeds back a valid drive displacement, the logic determines it as a true action, outputs a complete transmission chain verification signal, and allows the valve to continue operating. Conversely, if the displacement detection unit shows that the drive mechanism has moved significantly, but the signal output by the pressure detection unit in the window is still a flat line or only random background noise, without any characteristic drop waveform, then the system logic determines it as a false action, that is, it is determined that the sealing seat assembly 14 is in a jamming failure or mechanical misalignment state.

[0042] Example 4: To address the complex interference that may exist in industrial settings, a single threshold determination may face the risk of misjudgment. Therefore, this example introduces a signal cross-correlation analysis strategy. Within the monitoring window, the system monitors the magnitude of pressure drop and also calculates the cross-correlation coefficient between the first derivative of the displacement signal (i.e., driving speed) and the first derivative of the pressure signal (i.e., pressure change rate) in real time. In a normal fluid-structure interaction physical model, the faster the driving speed, the higher the volume expansion rate of the annular pressure-conducting chamber 20, resulting in a more severe pressure drop; a significant strong correlation should exist between the two. If the system detects pressure fluctuations but their trend is not correlated with the driving speed, or their phase leads the driving action, the system will identify them as spurious signals (such as water hammer impact in a pipeline) and automatically trigger a secondary verification process.

[0043] When the verification logic finally confirms that the sealing seat assembly 14 is in a jammed failure state, the sensing and monitoring component will immediately activate the anti-shear safety interlock control strategy. The specific execution process includes: the controller directly cuts off the power supply or air supply circuit of the actuator (such as an electric actuator or hydraulic pump station) through the hard-wired port. For actuators equipped with mechanical brakes or hydraulic locking devices, the system synchronously triggers a locking command to forcibly fix the valve stem 12 in the current slightly open position. Since the verification logic is completed in the very early stage of valve action (usually within the first 3 to 5 degrees of valve stem rotation), at this time the edge of the flow channel on the surface of the valve ball 11 is still within the designed reserved sliding trajectory area 22 and has not yet contacted the critical sealing surface of the seal 19.

[0044] After triggering the interlock shutdown, the sensing and monitoring components automatically enter a fault-freeze mode. The system packages and stores the pressure-displacement synchronous waveform data within the monitoring window into non-volatile memory and generates a unique fault event ID. Simultaneously, a specific fault code is sent to the DCS system in the central control room via the industrial fieldbus. Maintenance personnel can retrieve this data to visually compare the waveforms where the drive end moves but the pressure end does not, thus quickly locating the fault as a seal adhesion inside the valve body.

[0045] Example 5: As the valve's service life increases, the seal 19 will experience normal frictional wear, and a small amount of scale may adhere to the inner wall of the pressure guiding channel 16. These physical changes will slightly affect the shape of the characteristic pressure drop waveform. In this example, the system will establish a historical database to store the characteristic parameters of the pressure drop waveform (such as peak amplitude, half-wave width, and rise slope) for each successful operation.

[0046] The system's internal trend analysis algorithm periodically compares the current waveform with the factory baseline waveform. For example, if it finds that, over time, under the same driving conditions, the pressure drop amplitude shows a monotonically decreasing trend, and the pressure recovery speed is significantly faster, this indicates that the effective volume of the annular pressure-conducting chamber 20 is decreasing due to impurity deposition, or that a slight internal leakage has occurred at the mating surface between the seal 19 and the sealing valve seat 18, allowing the external medium to quickly fill the expansion space. Based on this analysis, the system can calculate the health index in advance, even before a fault affects normal operation, and issue predictive maintenance suggestions to the user, such as cleaning the pressure-conducting channels or checking the sealing preload.

[0047] Furthermore, the system also features a self-learning function for different media viscosities. When a valve is first put into operation or the process medium changes, the system can execute a self-learning mode. In this mode, the system automatically plots the pressure response characteristic curve under the current medium viscosity and pressure by performing multiple small-amplitude test actions within a safe range, and automatically updates the judgment threshold and window parameters in the verification logic accordingly. For example, when the medium changes from low-viscosity naphtha to high-viscosity residue oil, the system automatically identifies the change in pressure response hysteresis and automatically extends the monitoring window to prevent false alarms caused by changes in medium characteristics.

[0048] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A high-sealing dynamic regulating ball valve, comprising a valve body (10) and a valve ball (11), a valve stem (12) located at the top of the valve body (10) and connected to the valve ball (11), and a medium passage (13) located within the valve body (10), characterized in that, Also includes: A sealing seat assembly (14) is arranged on both sides of the valve ball (11) and cooperates with the valve ball (11) to achieve a seal. The sealing seat assembly (14) includes an elastic pre-tightening element (15) and a sealing element (19). The elastic pre-tightening element (15) applies a pre-tightening force to the sealing element (19) along the axial direction of the medium channel (13). A pressure guiding channel (16) connects the medium channel (13) and the sealing seat assembly (14). A drive mechanism (17) that is pulverically connected to the sealing seat assembly (14) is installed on the valve stem (12).

2. The high-sealing dynamic regulating ball valve according to claim 1, characterized in that, The surface of the valve ball (11) is provided with a sliding trajectory area (22) and a sealing area (23). The sliding trajectory area (22) and the sealing area (23) are both located on the end of the valve ball (11) near the sealing seat assembly (14) and are arranged sequentially along the medium flow direction. The sliding trajectory area (22) and the sealing area (23) are both annular strip areas and are arranged adjacent to each other along the circumference of the valve ball (11).

3. The high-sealing dynamic regulating ball valve according to claim 2, characterized in that, The sliding trajectory area (22) is an annular convex band and / or an annular groove band, the sealing area (23) is a smooth spherical area, and the surface roughness of the sealing area (23) is less than or equal to the surface roughness of the sliding trajectory area (22).

4. The high-sealing dynamic regulating ball valve according to claim 1, characterized in that, The sealing seat assembly (14) includes a sealing valve seat (18), the elastic pre-tightening element (15) and the sealing element (19) are mounted on the sealing valve seat (18), the valve body (10) is provided with a valve seat mounting hole to facilitate the installation of the sealing valve seat (18), the inner side of the sealing valve seat (18) is formed with an annular sealing mating surface adapted to the valve ball (11), and the sealing element (19) is arranged in an annular shape and located at one end of the sealing valve seat (18) near the valve ball (11).

5. A high-sealing dynamic regulating ball valve according to claim 4, characterized in that, The end of the sealing valve seat (18) away from the valve ball (11) forms an annular pressure-conducting chamber (20) that communicates with the pressure-conducting channel (16).

6. A high-sealing dynamic regulating ball valve according to claim 1, characterized in that, The drive mechanism (17) includes a cam (24) fixedly sleeved on the valve stem (12) and a force transmission member (25) that cooperates with the cam (24) and slides along the axial direction of the medium channel (13). The force transmission member (25) is connected to the seal (19).

7. A high-sealing dynamic regulating ball valve according to claim 1, characterized in that, It also includes a sensing and monitoring component configured to be connected to an external controller signal, and the sensing and monitoring component includes: a pressure detection unit disposed at the pressure guiding channel (16) or the sealing seat assembly (14) for real-time monitoring of the medium pressure signal at the sealing seat assembly (14); and / or, a displacement detection unit disposed at the valve stem (12) or the drive mechanism (17) for real-time monitoring of the rotation angle of the valve stem (12) or the axial displacement of the sealing seat assembly (14).

8. A high-sealing dynamic regulating ball valve according to claim 7, characterized in that, The sensing and monitoring component is configured to perform mechanical transmission integrity verification logic to prevent the seal (19) from being damaged due to the sealing seat assembly (14) failing to perform the retraction action due to mechanical jamming; The mechanical transmission integrity verification logic is configured as follows: during the stroke of the drive mechanism (17) driving the sealing seat assembly (14) to move, the sensing and monitoring assembly synchronously collects the displacement change signal fed back by the displacement detection unit and the pressure change signal fed back by the pressure detection unit, and based on the principle of fluid volume change, by comparing the time synchronization of the pressure change signal and the displacement change signal, it determines whether the sealing seat assembly (14) has performed a real physical retreat action.

9. A high-sealing dynamic regulating ball valve according to claim 8, characterized in that, The specific decision-making strategy for the mechanical transmission integrity verification logic is configured as follows: Within the monitoring window at the instant the valve stem (12) opens and the drive mechanism (17) drives the sealing seat assembly (14) to move away from the valve ball (11), the pressure detection unit determines that the transmission chain of the sealing seat assembly (14) is complete and the operation is effective only when it captures the characteristic pressure drop waveform generated by the instantaneous expansion of the volume in the annular pressure guiding chamber (20). If the displacement detection unit detects the displacement change signal, but the pressure detection unit does not capture the characteristic pressure drop waveform within the monitoring window, then the sealing seat assembly (14) is determined to be in a jamming failure or mechanical misalignment state.

10. A high-sealing dynamic regulating ball valve according to claim 9, characterized in that, The sensing and monitoring component is also equipped with an anti-shear safety interlock control strategy; The anti-shear safety interlock control strategy is configured as follows: when the sealing seat assembly (14) is in a jamming failure or mechanical misalignment state, the sensing and monitoring assembly immediately sends a stop command to the external controller to forcibly lock the valve stem (12) to prevent it from continuing to rotate, thereby preventing the valve ball (11) from forcibly rotating and shearing damage to the seal (19) under high specific pressure conditions where the sealing seat assembly (14) has not effectively retreated.

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