A pressure adaptive sealing control method and device

Abstract

This invention relates to a pressure adaptive sealing control method and apparatus. The apparatus includes: a sealing seat with a static sealing surface and a first conductive channel; a state transition member rotatably disposed within the sealing seat and having a second conductive channel; an elastic drive member disposed within the sealing seat, comprising a pressure-bearing elastic energy storage member and a sliding trigger member mechanically locked thereto; and a pressure trigger valve disposed on an external pressure drainage channel. When the ambient pressure reaches a set threshold, the pressure trigger valve opens, drawing high-pressure medium to push the sliding trigger member to release the restriction on the elastic energy storage member; the elastic energy storage member rapidly releases energy and pulls the state transition member to rotate, causing the first and second conductive channels to be offset relative to each other, thereby closing the airflow channel.

Description

Technical Field

[0001] This invention relates to the field of pressure sealing technology, and in particular to a pressure adaptive sealing control method and device. Background Technology

[0002] Sealing technology is an important technical means to prevent leakage of fluids or solid particles under the action of pressure difference between the inside and outside of equipment, and to block external impurities from entering mechanical equipment. It achieves reliable sealing by sealing the gaps between mating surfaces or suppressing pressure difference. The occurrence of leakage is usually closely related to the surface processing defects of components and the pressure difference of the medium. Therefore, in industrial production and daily applications, a variety of sealing structure forms have been developed for different operating conditions.

[0003] Existing sealing technologies mainly fall into two categories: static seals and dynamic seals. Static seals typically use gaskets or sealants to achieve a seal; they are simple in structure but require high assembly precision and long-term stability. Dynamic seals are further divided into contact seals and non-contact seals. Contact seals form a seal through direct contact between the sealing element and the moving part, which is prone to wear and limits equipment speed and service life. To overcome these problems, non-contact seals are increasingly being used. They prevent media leakage by creating a tiny gap between the sealing element and the moving part, utilizing flow resistance or centrifugal force. Typical forms include labyrinth seals, oil slinger ring seals, and dry gas seals.

[0004] However, existing non-contact seals generally rely on the high-speed rotation of the equipment to generate centrifugal force, or on complex tortuous flow channels inside the sealing component to create sufficient flow resistance. This places high demands on structural design and manufacturing precision, increasing manufacturing difficulty and cost. Taking dry gas seals as an example, auxiliary systems such as gas supply and recovery are also required, which not only increases system complexity and operating costs, but also inevitably introduces other media into the equipment, potentially affecting the normal operating conditions of the sealed equipment. Furthermore, under non-rotational conditions, the sealing effect of the aforementioned non-contact sealing methods is often difficult to guarantee.

[0005] US20120126492A1 discloses a pressure-activated seal comprising a main wall, sidewalls connected to both ends of the main wall, and flexible baffles (or flexible flaps) connected to the sidewalls. The main wall, sidewalls, and flexible baffles define a main chamber adapted to receive fluid pressure to activate the pressure-activated seal, thereby forming a seal between opposing adjacent surfaces. The pressure-activated seal can be placed between concentric tubes or adjacent plates, wherein one tube or plate includes one or more orifices leading to the main chamber to allow fluid pressure to activate the pressure-activated seal, thereby forming a seal between opposing adjacent surfaces of the tube or plate. When this seal is applied between concentric tubes where relative sliding exists, the flexible baffles must be tightly pressed against the surface of the moving parts under the thrust of the fluid pressure. This operating principle is essentially a contact seal, inevitably generating friction, which can lead to seal wear over time, limiting the lifespan of the equipment.

[0006] US20160018004A1 discloses a controllable mechanical seal for sealing a shaft rotatable relative to a housing of a device for handling fluid. The seal includes: (i) a first end face element having a first end face adapted to rotate with the shaft; and (ii) a second end face element having a second end face adapted to be supported within the housing. The first and second end faces define a gap between their surfaces, the size of which helps to limit the leakage rate of fluid through the gap. At least one of the first or second end face elements includes at least one element completely located within the housing. The at least one cavity inside the end face element is adapted to contain hydraulic fluid; and the at least one cavity is in fluid communication with at least one hydraulic booster and at least one pressure control valve, the at least one hydraulic booster being in pressure communication with a pressure source; (iii) a sensor adapted to generate an indication signal of leakage rate; and (iv) a controller that generates an output in response to the signal; wherein the state of the at least one pressure control valve is adapted to change in response to the output of the controller to increase or decrease the pressure of the hydraulic fluid in the at least one cavity, thereby deforming the first end face or the second end face to adjust the leakage rate. In this technical solution, the end face element must contain a cavity filled with hydraulic fluid; the cavity needs to be connected to the hydraulic booster and the pressure control valve; the system also needs to be equipped with a sensor for monitoring the leakage rate and a microcontroller; the microcontroller adjusts the leakage rate by adjusting the hydraulic pressure to deform the end face. This structure suffers from the technical drawback of the non-contact seal mentioned above, which "inevitably introduces other media into the equipment by configuring auxiliary systems (such as supply, recovery, etc.)".

[0007] To address the shortcomings of existing technologies, this invention provides a pressure adaptive sealing control method and device to solve the technical problem of how to utilize the pressure changes of the environmental medium itself to achieve automatic sealing and selective airflow channel control of the media inside and outside the equipment, thereby preventing fluid or solid particle leakage and blocking the intrusion of external impurities, without the need for external sealing media, high-speed rotation, or complex resistance structures.

[0008] Furthermore, on the one hand, there are differences in understanding among those skilled in the art; on the other hand, the applicant studied a large number of documents and patents when making this invention, but due to space limitations, not all details and contents were listed in detail. However, this does not mean that the present invention does not possess the features of these prior art. On the contrary, the present invention already possesses all the features of the prior art, and the applicant reserves the right to add relevant prior art to the background art. Summary of the Invention

[0009] Current non-contact dynamic seals generally rely on the high-speed rotation of the equipment to generate centrifugal force, or on complex tortuous flow channels to create flow resistance, requiring high precision in structural design and manufacturing. More importantly, existing solutions (such as dry gas seals and controllable mechanical seals) often require complex external auxiliary systems for gas supply, recovery, or hydraulic control. This not only significantly increases the overall complexity and operating cost of the system, but also inevitably introduces exogenous media into the sealed equipment, posing a risk of cross-contamination. Furthermore, under non-rotating conditions or extreme conditions of sudden changes in environmental pressure, the reliability of traditional seals is often difficult to guarantee.

[0010] To overcome the above-mentioned defects, the present invention provides a pressure adaptive sealing control method and device. The technical problem to be solved by the present invention is: how to achieve automatic sealing of the internal and external media and selective control of the opening and closing of the airflow channel by using only the pressure change of the environmental medium itself as the triggering mechanism and power source, without the need for external additional sealing medium, high-speed rotation of the equipment or reliance on complex resistance structures, thereby preventing fluid or solid particle leakage and effectively blocking the intrusion of external impurities.

[0011] This invention provides a pressure adaptive sealing control device, comprising a sealing seat, a state transition member, an elastic drive member, and a pressure trigger valve; the sealing seat is provided with at least one first conducting channel spaced apart in the circumferential direction, and one side forms a static sealing surface for bearing the pressure of the ambient medium; the state transition member is rotatably disposed on the sealing seat and is provided with a second conducting channel adapted to the first conducting channel; the state transition member can be controlled to rotate within the sealing seat so that the first conducting channel and the second conducting channel are in a first position of overlapping and communication or a second position of misalignment and closure; the elastic drive member is disposed within the sealing seat. The sealing seat includes an elastic energy storage element in a pressurized energy storage state and a sliding trigger element that mechanically locks and limits the elastic energy storage element; and a pressure trigger valve is set on the pressure drainage channel connecting the device to the external environment; when the pressure of the ambient medium reaches a set threshold, the pressure trigger valve is turned on, guiding the high-pressure ambient medium into the pressure drainage channel and applying a fluid normal thrust to the sliding trigger element, thereby releasing the mechanical limit on the elastic energy storage element; the elastic energy storage element releases its elastic potential energy and pulls the state conversion element to rotate, so that the first conduction channel and the second conduction channel are relatively misaligned to block the airflow channel.

[0012] This technical solution constructs a sealing and channel control architecture that requires no external power source and is driven by the pressure difference of the ambient medium. A pressure-triggered valve senses the external environmental pressure difference; when the medium pressure reaches a set threshold, it directly guides the medium thrust to release the mechanical restraint on the sliding trigger, thereby releasing the potential energy stored in the elastic energy storage component to cause the state transition component to rotate and misalign. The technical advantage of this structural design is that the device achieves state-adaptive channel blocking and sealing, overcoming the shortcomings of traditional solutions that rely on external auxiliary power or the centrifugal force of high-speed rotation. It not only achieves rapid cutoff without additional energy consumption but also avoids cross-contamination of the protected equipment caused by the introduction of exogenous media, improving the device's independent operation capability and reliability under extreme pressure and variable operating conditions.

[0013] According to a preferred embodiment, the sealing seat specifically includes a base component and a mounting base fixedly assembled on the base component. The base component and the mounting base together enclose and define the mounting cavity. A rotating fitting component is provided on the mounting base extending axially. The inner edge of the state transition component is sleeved on the outer peripheral surface of the rotating fitting component and rotates coaxially in the mounting cavity based on the guidance of the rotating fitting component.

[0014] A protected mounting cavity is enclosed by a separate assembly structure of the base component and the mounting base, with an axially extending rotary fitting component serving as a guide surface and spatial limiting structure for the rotation of the state transition component. The technical advantages of this solution are twofold: firstly, by placing the internal actuator within the cavity, it is protected from direct impact by high-pressure fluid; secondly, the rotary fitting component restricts the radial and axial movement of the state transition component, ensuring coaxiality during sudden release and preventing misalignment or localized pressure imbalance between the dynamic and static sealing surfaces caused by eccentric movement or cross-flow.

[0015] According to a preferred embodiment, the first conductive channel is formed by connecting the first conductive port and the second conductive port, which respectively axially penetrate the base and the mounting base, in the axial projection; the state transition component is embedded between the base and the mounting base, and the second conductive channel simultaneously connects the first conductive port and the second conductive port when it is inserted into the first position.

[0016] This invention constructs a fluid exchange path that runs through the base component, the state transition component, and the mounting base. This allows the state transition component, located in the middle, to control the overlap or blockage of the entire airflow channel with only a limited in-situ rotation. The advantages of this invention are: in the connected state, this straight channel provides a low-resistance medium exchange path, improving flow guiding efficiency and avoiding flow obstruction caused by tortuous flow paths; while in the closed state, the wall of the state transition component can isolate the flow path, ensuring effective sealing under high pressure differential environments.

[0017] According to a preferred embodiment, a snap-fit ​​channel is formed circumferentially on the base component, and the pressure drainage channel is connected to the snap-fit ​​channel. Under initial normal or low-pressure conditions, one end of the sliding trigger is inserted into the snap-fit ​​channel. When the high-pressure ambient medium enters the snap-fit ​​channel through the open pressure trigger valve, the sliding trigger slides out of the snap-fit ​​channel. Under low-pressure normal conditions, the snap-fit ​​channel locks the sliding trigger. When the high-pressure threshold is reached, the high-pressure medium is directionally introduced into the blind end, directly acting on the normal pressure-bearing end face of the trigger for pushing. Therefore, this invention establishes a potential energy triggering management mechanism that maintains a locked state and prevents false triggering under pressure fluctuation conditions. When the threshold is not reached or a slight pressure disturbance is encountered, the limiting energy prevents the elastic element from being falsely released. Once the valve is open, the fluid pressure difference is fully converted into an axial thrust to overcome mechanical resistance, resulting in rapid response and reliable operation.

[0018] According to a preferred embodiment, the state transition member has an inner groove, and the elastic drive member is entirely accommodated in the inner space of the groove. The elastic drive member also includes a traction member that passes through the internal channel of the elastic energy storage member. One end of the traction member is connected to a sliding trigger member, and the other end is fixedly connected to the side of the protruding block inside the state transition member, so as to traction the state transition member to rotate circumferentially when the elastic energy storage member extends and releases.

[0019] The technical function of this internal arrangement is to embed the elastic drive component, which serves as the power source, entirely within the mounting slot space of the state transition component. A traction component moving through this slot converts the linear slippage of the sliding trigger component into an eccentric torque that drives the circumferential rotation of the state transition component. This integration of drive and execution units achieves miniaturized integration of the mechanical structure, significantly reducing the overall axial assembly thickness of the device and substantially lowering the risk of external space interference. This makes the invention highly applicable in confined engineering spaces such as deep-sea exploration cabins and micro-pipeline systems.

[0020] According to a preferred embodiment, the elastic drive component has a fixing block inside, which is fixed to the mounting base by fasteners; a detachable closure component is provided on the outside of the fixing block corresponding to the assembly position of the base component; a second guide channel is provided circumferentially through the inside of the closure component, and a first guide channel is formed by recessing the bottom end of the fixing block; the first guide channel and the second guide channel are spliced ​​together to jointly enclose and define a sliding channel, and the sliding trigger component is accommodated in the sliding channel.

[0021] This invention fixes a fixed block to the inner wall of the base as a static support for releasing elastic force. Simultaneously, the splicing of the sealing component and the fixed block forms a through-type composite sliding channel to restrict the movement direction of the sliding trigger. The resulting technical advantages are: the fixed reference eliminates interference from the spring's reaction force causing unintended deformation of the sealed housing; it avoids potential flipping, radial displacement, or jamming failures of the sliding trigger when it trips under high-pressure impact, ensuring high consistency and long-term stability of the execution action.

[0022] According to a preferred embodiment, the sliding trigger is a slider whose structure matches the sliding channel, comprising a locator and a first slide rod and a second slide rod located at both ends of the locator; the second slide rod passes through the second guide channel and is inserted into the engagement channel; the first slide rod and the locator are located within the sliding channel. The stepped shaft-type multi-segment locator of this invention enables the sliding trigger to achieve functional differentiation within a limited stroke: the second slide rod at the front end is used to achieve engagement and locking in narrow spaces, while the main body provides a large area of ​​guidance and force-bearing contact within the channel. This optimizes the mechanical stress distribution and guide base length of the moving parts, allowing the sliding trigger to maintain a smooth and stable motion trajectory even when experiencing high-frequency, high-energy tripping, significantly enhancing the impact resistance and fatigue life of the internal transmission mechanism under large voltage fluctuation cycles.

[0023] According to a preferred embodiment, a through-hole installation channel is provided on the sealing seat and the state transition component. When the airflow channel is closed, the static sealing surface of the sealing seat and the end face of the state transition component are pressed together by the ambient medium pressure. This invention utilizes the through-hole installation channel in conjunction with external fasteners to achieve overall device fixation. After blocking the airflow, the differential pressure load generated by the external high-pressure fluid is allowed to act directly on the end faces of the sealing seat and the state transition component, forcing the dynamic and static sealing interfaces to press against each other along the normal direction. The stable assembly channel smoothly transmits the axial thrust load to the external base, avoiding structural buckling or dangerous movement of the device body under high-pressure impact. Furthermore, by automatically converting the medium pressure difference into sealing surface clamping force, a positive feedback adaptive sealing effect is achieved where the higher the external pressure, the greater the mechanical contact pressure, eliminating the risk of pressure leakage under extreme operating conditions.

[0024] The present invention provides a pressure adaptive sealing control method from a second aspect. The method includes: under initial operating conditions, mechanically locking and limiting an elastic energy storage component by a sliding trigger to maintain the pressurized energy storage state of the elastic energy storage component, and restricting a state transition component rotated on a sealing seat to remain in a first position, so that the second conduction channel on the state transition component coincides and connects with the first conduction channel on the sealing seat; when the ambient medium pressure reaches a set threshold, a pressure trigger valve disposed on a pressure drainage channel is opened, guiding the high-pressure ambient medium to apply fluid thrust to the sliding trigger through the pressure drainage channel, forcing the sliding trigger to release the mechanical limitation on the elastic energy storage component; the elastic energy storage component releases elastic potential energy and pulls the state transition component to rotate, so that the first conduction channel and the second conduction channel are relatively misaligned to block the airflow channel; subsequently, the pressure difference load of the ambient medium directly acts and forces the dynamic and static sealing interfaces to press against each other along the normal direction to form an adaptive seal.

[0025] This method directly converts sudden changes in ambient medium pressure into trigger signals and mechanical driving forces, constructing a self-driven control timing sequence that requires no external intervention. Its technical advantages include overcoming the shortcomings of relying on external power supply, sensor control units, and external auxiliary air sources, simplifying the system's control process, and significantly reducing operating costs and the risk of electrical control failures. Simultaneously, by guiding the pressure difference of the medium directly onto the sealing interface, it achieves positive feedback adaptive sealing where the adhesion force increases positively with pressure, greatly improving the overall reliability of the device in handling frequent pressure changes and extreme pressure conditions.

[0026] According to a preferred embodiment, the method further includes: a sliding trigger, under the action of fluid thrust, slides out of the locking channel within the sealing seat; the sliding trigger slides within a sliding channel defined by the splicing of a first guide channel and a second guide channel; an elastic energy storage component releases elastic potential energy and, through a traction component connected to the sliding trigger, pulls the state transition component to rotate. Through the coordinated action of fluid dynamic unlocking and channel guidance, the retraction trajectory of the transmission component is defined, and the traction component reliably converts the linear mechanical thrust into a tangential torque driving the circumferential rotation of the state transition component. This guiding structure effectively prevents radial offset and motion jamming caused by sudden impact or potential energy release of the high-pressure medium, ensuring a smooth tripping and energy release process; simultaneously, the clear mechanical transmission mechanism ensures that the state transition component can stably obtain a driving load sufficient to overcome the static friction of the end face, thereby ensuring the accuracy of the flow channel misalignment blocking action and high consistency under high-frequency cyclic operation. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the pressure adaptive sealing control device provided by the present invention; Figure 2 This is a schematic diagram of the structure of the sealing seat provided by the present invention; Figure 3 This is an exploded structural diagram of the sealing seat and state transition component provided by the present invention; Figure 4 This is an exploded structural diagram of the pressure adaptive sealing control device provided by the present invention from one angle; Figure 5 This is an exploded structural diagram of the pressure adaptive sealing control device provided by the present invention from another angle; Figure 6 This is a schematic diagram of the structure of the elastic drive component provided by the present invention; Figure 7 This is a schematic diagram of the pressure adaptive sealing control device provided by the present invention in a compressed state; Figure 8 This is a schematic diagram of the pressure adaptive sealing control device provided by the present invention in the released state.

[0028] List of reference numerals 100: Sealing seat; 110: Base component; 111: First guide port; 112: Snap-fit ​​channel; 113: Sealing component; 114: Second guide channel; 120: Mounting base; 121: Second guide port; 122: Rotary mating component; 123: Mounting cavity; 124: Fastener; 125: First guide channel; 130: Mounting channel; 200: State transition component; 210: Mounting groove; 220: Second guide channel; 300: Elastic drive component; 310: Fixing block; 311: First guide channel; 312: Sliding channel; 320: Sliding trigger component; 321: Movable element; 322: First slide rod; 323: Second slide rod; 330: Elastic energy storage component; 340: Traction component; 350: Pressure trigger valve; 360: Pressure drainage channel. Detailed Implementation

[0029] The following is a detailed explanation with reference to the accompanying drawings.

[0030] This invention defines directional terms.

[0031] Axial direction: refers to the direction parallel to the central axis of the device or rotating body.

[0032] Circumferential direction: refers to the direction of the circumference of a circle rotating around its central axis.

[0033] Normal direction: refers to the direction perpendicular to a certain contact surface or force-bearing surface.

[0034] Radial: refers to the direction that radiates outward from the center of the axis, perpendicular to the central axis.

[0035] Tangential: refers to the direction tangential to the circular motion trajectory, used to describe the direction of the force that generates rotational torque.

[0036] Example 1 This invention provides a pressure-adaptive sealing control device. In the prior art, to meet the requirements of media isolation and channel opening and closing in equipment under varying pressure environments, conventional rubber sealing rings, lip seals, contact mechanical seals, or sealing is typically achieved by adding a pressure balancing chamber, external auxiliary air source, or other structural forms.

[0037] However, the aforementioned traditional solutions largely rely on mechanical assembly preload or external active power units to maintain the sealing state. When the pressure of the external environment medium undergoes a significant jump, its sealing reliability is compromised. Especially under variable operating conditions where equipment suddenly transitions from an atmospheric or low-pressure environment to a high-pressure environment, these traditional solutions are prone to technical problems such as insufficient contact pressure between dynamic and static sealing surfaces, accelerated wear of sealing components, and even overall seal failure. Furthermore, existing sealing and channel control devices are often limited by the need to introduce exogenous sealing media into the system or to configure complex external control mechanisms. This not only results in a large overall device structure and limited space assembly dimensions but also inevitably leads to high system operating energy consumption, high subsequent maintenance costs, and insufficient system stability and reliability under extreme pressure environments.

[0038] See Figure 1 This invention provides a pressure-adaptive sealing control device, also known as an adaptive sealing and channel control device based on ambient medium pressure. The sealing seat 100, as the basic load-bearing component of the entire device, constitutes the supporting structure. Specifically, the sealing seat 100 has a plurality of first conductive channels 125 spaced apart circumferentially, and one side forms a static sealing surface to withstand pressure and achieve a sealing fit under ambient medium pressure.

[0039] The sealing seat 100 mainly includes a base component 110 and a mounting base 120 fixedly mounted on the base component 110. The base component 110 is located on the environmental medium side of the device, directly bearing the pressure of the external environmental medium and serving as the basic support component of the entire device. The mounting base 120 is fixed to the base component 110, and the two together form a mounting cavity 123 after assembly. This mounting cavity 123 serves as the internal space of the device, specifically used to accommodate the state transition component 200 and its related drive structure components, protecting and defining their position.

[0040] Preferably, the base component 110 and the mounting base 120 can be standard mechanical support components with high pressure-bearing rigidity and structural strength, such as equipment flanges, end cap assemblies, pressure-bearing pipe joints, or valve body shells.

[0041] To ensure the sealing device is positioned and reliably fixed on external equipment, an axially extending installation channel 130 is provided within the device. During actual assembly, fastening components are inserted into the installation channel 130 to secure the entire device to a pre-set installation position on the outside of the equipment. Specifically, the installation channel 130 not only serves as an external fixation and positioning mechanism but also provides guidance and limiting functions. When the sealing seat 100 is subjected to high-pressure environmental media, the fastening components within the installation channel 130 help transfer part of the axial load to the external mounting structure, effectively preventing axial movement of the sealing seat 100. This improves the structural stability and sealing consistency of the overall device architecture under high-pressure environments.

[0042] Please see Figure 2 , Figure 3 and Figure 4 This invention provides a device for sealing and channel control based on environmental medium pressure. The device includes at least a sealing seat 100, a state transition element 200, and a drive mechanism.

[0043] As the basic load-bearing and supporting component of the device, the sealing seat 100 is provided with at least one first conducting channel 125 at intervals in the circumferential direction. Preferably, the plurality of first conducting channels 125 are evenly distributed in the circumferential direction to avoid fluid imbalance and improve the uniformity of medium flow. Each first conducting channel 125 is arranged axially through the sealing seat 100 to provide a continuous flow path for the external environmental medium or the medium required inside the sealed equipment under specific operating conditions (such as the initial state of normal pressure). In addition, at least one side (or internal mating surface) of the sealing seat 100 forms a static sealing surface. Under operating conditions, this static sealing surface forms a dynamic and static sealing interface with the corresponding surface of the state transition member 200 based on the pressure difference of the environmental medium, thereby effectively preventing the unintended penetration of the environmental medium into the equipment.

[0044] As an actuator for opening and closing the airflow channel, the state transition component 200 is at least partially embedded inside the sealing seat 100. The state transition component 200 is provided with a second conduction channel 220. Preferably, the number, circumferential distribution, and cross-sectional shape of each second conduction channel 220 are adapted to the first conduction channel 125. Under the constraint of spatial motion freedom, the state transition component 200 can rotate in a controlled manner relative to the sealing seat 100 around its central axis. Through the guided rotational engagement of the state transition component 200, the second conduction channel 220 can be driven to switch between a first position and a second position: when the two switch to the first position where they completely overlap, a through, low-resistance airflow channel is formed to allow the medium to pass through; when the two switch to the second position where they are relatively misaligned, the first conduction channel 125 is completely blocked and isolated by the wall of the state transition component 200, thereby achieving reliable closure of the airflow channel.

[0045] Preferably, the state transition component 200 can be a mechanical component such as a rotary valve disc, a perforated throttling plate, a rotary blind valve core, or a distribution plate, to achieve physical blocking and switching of different flow paths.

[0046] The drive mechanism, serving as the device's built-in power and trigger assembly, specifically includes an elastic drive element 300 housed within the sealing seat 100, and a pressure trigger valve 350 for triggering the elastic drive element 300 to actuate according to changes in medium pressure. In the initial stage of normal or low-pressure operation, the elastic drive element 300 is in a compressed, pre-tightened, pressurized energy-storing state under mechanical constraints, thereby accumulating elastic mechanical potential energy to drive the rotation of the state transition element 200. The pressure trigger valve 350 is positioned on a pressure channel connecting to the external environment. Its fluid inlet is directly connected to the external environment, while its outlet is connected to the hydraulic or pneumatic force-bearing actuator corresponding to the elastic drive element 300. When the external environmental pressure continuously rises and reaches a preset trigger safety threshold, the pressure trigger valve 350 opens, guiding the high-pressure medium in and releasing the mechanical constraint on the elastic drive element 300, causing it to rapidly release its potential energy. This, in turn, guides the state transition element 200 to rotate under a preset trajectory, causing the first conduction channel 125 and the second conduction channel 220 to close in a misaligned manner.

[0047] See Figure 1 and Figure 7 In accordance with the normal operating logic of the device of the present invention, when the device is in the initial operating condition of air or other relatively low pressure environment, the pressure trigger valve 350 configured on the pressure diversion channel 360 remains closed because the preset trigger pressure threshold has not been reached.

[0048] In this state, the pressure trigger valve 350 cuts off the high-pressure fluid inlet path, preventing external environmental media from entering the built-in drive mechanism via the pressure drainage channel 360 (specifically, the media cannot enter the locking channel 112 and act on the pressure-bearing end face of the sliding trigger 320). Without external fluid normal thrust, the sliding trigger 320 in the drive mechanism maintains its original mechanical limit state, thereby allowing the elastic drive 300 to stably maintain its pre-compressed, pressurized energy-storing state. Preferably, the elastic energy storage element 330, serving as the power source for the elastic drive 300, is disposed between the fixed block 310 and the state transition element 200. Preferably, the elastic energy storage element 330 can specifically be a standard energy storage element capable of stably accumulating and releasing mechanical potential energy, such as a helical compression spring, a disc spring assembly, a wave spring, or a mechanically enclosed gas spring.

[0049] Based on the static locking of the aforementioned transmission chain, the state transition component 200 partially embedded in the sealing seat 100 is restricted in its circumferential rotational freedom, thereby maintaining a preset initial rotation angle (i.e., the first position). Through the accurate positioning of this spatial posture, the second conduction channel 220 opened on the state transition component 200 and the first conduction channel 125 penetrating on the sealing seat 100 (specifically, the channel formed by the first conduction port 111 of the base component 110 and the second conduction port 121 of the mounting base 120 connected axially) are completely aligned and overlapped in the axial projection, thereby forming a low-resistance through flow path, so that the entire device is in a working state with the airflow channel open, allowing external environmental media or the working medium required by the equipment to enter the sealed equipment to meet the media exchange or pressure balance requirements in the initial stage of equipment operation.

[0050] See Figures 1 to 8 This demonstrates the operating logic and sealing state switching process of the device when it transitions from a low-pressure environment to a high-pressure environment (or when the system experiences a significant pressure surge).

[0051] When the pressure of the external environment medium continuously increases and reaches the preset trigger safety threshold of the pressure trigger valve 350, the pressure trigger valve 350 is opened and energized. At this time, part of the high-pressure environment medium is directly guided to the pressure-bearing execution area of ​​the internal drive mechanism (specifically, acting on the end face of the sliding trigger 320) through the through pressure drainage channel 360. Under the action of the medium thrust, the mechanical limit of the elastic drive 300 is released. Preferably, the sliding trigger 320 overcomes the resistance and disengages from the original latch. At this time, the elastic drive 300 (specifically, the elastic energy storage element 330), as the power source, is released from its position restriction and releases its pre-stored mechanical potential energy; under the traction of the elastic restoring force (through the mechanical transmission of the internal traction element 340), the drive state conversion element 200 rotates circumferentially along the preset guide rail. With the controlled rotation of the state conversion element 200, the second conduction channel 220 on it gradually deviates from the first conduction channel 125 on the sealing seat 100 until the two are completely misaligned (e.g., Figure 8 The first conductive channel 125 is in a closed state completely blocked by the solid plate surface, thereby achieving reliable cut-off of the airflow channel inside the device.

[0052] With the airflow channel completely blocked, the device enters a pressure-adaptive sealing mode. The pressure difference generated by the external high-pressure environment directly acts between the mating end faces of the sealing seat 100 and the state transition component 200. Based on this axial pressure differential load, the dynamic sealing surface and the static sealing surface are forced to fit tightly together; and following the laws of fluid mechanics, as the pressure of the external environment increases further, the normal contact clamping force acting between the two sealing surfaces increases synchronously and positively. This adaptive adjustment mechanism, powered by the environmental medium pressure, achieves a highly efficient sealing effect that tightens under increasing pressure, eliminates the leakage risks caused by pressure differential fluctuations, and effectively prevents the unintended intrusion of high-pressure environment fluids and their entrained solid particles into the device and the protected downstream equipment.

[0053] In summary, this invention eliminates the traditional reliance on complex external auxiliary air sources, intricate control mechanisms, and the centrifugal force of high-speed rotation. It achieves automatic switching of the sealing state and closure of the airflow channel solely based on the initial pressure rise of the ambient medium as the trigger signal and driving force. This solution not only utilizes the medium pressure itself to achieve end-face sealing with increasing pressure-adjustable adhesion, but also highly integrates channel opening and closing with adaptive sealing logic. It boasts advantages such as simplified structure and reliable action response, meeting the comprehensive requirements for reliable and maintenance-free flexible control of equipment under extreme or constrained environmental conditions such as non-rotation, variable operating conditions, and high water pressure.

[0054] Preferably, such as Figures 1 to 8 As shown, the device of the present invention integrates an elastic drive member 300 as the central actuator. The elastic drive member 300 is configured as a self-driven structure, and its operation is completely independent of external electrical / hydraulic power sources or additional actuators. Specifically, as... Figure 4 and Figure 7 As shown, under specific operating conditions, the opening and closing control process of the entire airflow channel can be achieved without additional energy consumption by using only the pressure jump of the external environmental medium itself as the triggering condition and direct driving force.

[0055] like Figure 8 As shown, although some media is introduced for triggering the action, the triggering environment media is always confined to the outside of the sealing interface (i.e., the environmental media side of the sealing seat 100). External fluids will never cross the sealing interface and enter the protected equipment, nor will they come into contact with the equipment or its internal materials. This isolation design based on sealing surface compression effectively avoids the risk of cross-contamination from external media to the equipment's interior, and further prevents equipment corrosion and abnormal wear caused by the introduction of high-pressure corrosive media. This significantly extends the overall lifespan of the protected equipment.

[0056] In addition, such as Figure 5 , Figure 6and Figure 7 As shown, the elastic drive element 300 (e.g., the sliding trigger element 320) is embedded in the mounting groove 210 inside the state transition element 200. Under this spatial constraint, the sliding trigger element 320 slides and releases in a controlled manner along the groove direction, while the state transition element 200 driven by it completes circumferential rotation within the same axial thickness space. This compact design, which highly overlaps and integrates the drive element and the flow path control element in the axial space, reduces the overall assembly size of the device in the axial direction. This feature makes the overall pipeline or end face layout more scientific and reasonable, not only reducing the risk of spatial interference, but also improving the engineering applicability of the invention in narrow or extremely restricted assembly spaces.

[0057] Preferably, such as Figure 2 As shown, the sealing seat 100 and the state transition component 200 are coaxially provided with a through mounting channel 130 so as to reliably and integrally set the device in the preset mounting position of the external equipment.

[0058] Specifically, such as Figure 2 As shown, the mounting channel 130 is arranged through the central axis of the device. This mounting channel 130 includes both a large central hole for accommodating the main shaft or pipeline of the equipment to be sealed, and a series of circumferentially spaced fastening connection holes. Preferably, the mounting channel 130 on the sealing seat 100 and the mounting channel 130 on the state transition member 200 are axially aligned, thus forming a continuous and through channel after the device is assembled. The main shaft can be passed through the mounting channel 130 for radial guidance, and the sealing seat 100 can be fixed to a static foundation such as the equipment housing or pipeline end using fastening components such as bolts and pins.

[0059] After completing the basic assembly described above, the installation channel 130 not only forms a force-bearing node for the overall fixation of the device, but its inner wall also provides radial limiting and axial guidance for the relative spatial position between the sealing seat 100 and the state transition component 200. Internal rotating guide rails (such as...) Figure 4 Under the coordinated constraint of the rotating mating component 122, it is ensured that the state transition component 200 maintains a coaxial operating relationship with the sealing seat 100 during the rotation driven by the elastic drive component 300 (i.e., the coaxiality error is limited to within a preset threshold). This structurally avoids the potential leakage risk caused by misalignment of the first conducting channel 125 and the second conducting channel 220 due to operational eccentricity or initial assembly tolerances, as well as uneven local specific pressure on the dynamic and static sealing surfaces.

[0060] In addition, such as Figure 7 and Figure 8 As shown in the comparison of operating conditions, the installation channel 130 (see...) Figure 2The continuous, through-structure of the sealing seat 100 allows it to effectively and smoothly transfer most of the axial thrust to the load-bearing base of the external equipment when subjected to step axial loads from external high-pressure media. This force transmission path prevents the sealing seat 100 from experiencing unexpected axial movement or buckling deformation, improving the structural disturbance resistance stability of the device under extreme high-pressure environments. Furthermore, in conjunction with the adaptive normal pressing action of the high-pressure medium on the end face, the sealing surfaces of the sealing seat 100 and the state transition component 200 maintain full contact even under varying operating conditions. This device achieves convenient modular assembly and disassembly while ensuring system-level high-pressure operational stability and sealing consistency. It is particularly convenient for quick manual disassembly and drive mechanism reset after a single operation, thus meeting the long-term engineering requirements for repeated use.

[0061] Furthermore, such as Figure 3 , Figure 4 and Figure 5 As shown, the sealing seat 100 serves as the main support for the entire device, specifically including a base component 110 and a mounting base 120 fixedly mounted on the base component 110. Figure 4 As shown in the exploded view, the mounting base 120 is provided with a rotating fitting member 122 and a recessed mounting cavity 123, and the state conversion member 200 is sleeved on the rotating fitting member 122 and can be rotated in a controlled manner in the mounting cavity 123 based on the guidance of the rotating fitting member 122.

[0062] Specifically, such as Figure 4 and Figure 5 As shown, the base component 110 is located on the environmental medium side of the device (i.e., upstream) along the pressure-bearing direction. One side (outer surface) corresponds to the external high-pressure environment to directly bear the environmental medium pressure, while the other side (inner surface) is tightly connected to the mounting base 120, serving as the basic support component of the entire device. The mounting base 120 is fixedly assembled onto the base component 110; after the two are tightened, the groove of the mounting base 120 and the inner surface of the base component 110 together enclose and define the mounting cavity 123. This mounting cavity 123 not only constitutes the cavity for accommodating the state transition component 200, but also provides a closed and protected mechanical movement space for the built-in drive structure (such as the elastic drive component 300).

[0063] Furthermore, such as Figure 3 and Figure 4As shown, a rotary fitting member 122 for limiting and guiding extends axially on the mounting base 120. This rotary fitting member 122 can be any form of circumferential guide protrusion or limiting channel; as a preferred embodiment, it has an annular or circumferential stepped structure. In the actual assembled state, the central inner edge of the state transition member 200 is fitted onto the outer circumferential surface of the rotary fitting member 122, forming a precise clearance fit, allowing the state transition member 200 to rotate coaxially around the rotary fitting member 122 within the mounting cavity 123 with high stability.

[0064] By limiting the structure of the rotating engagement component 122, the motion freedom of the state transition component 200 is restricted after the elastic drive component 300 is triggered and releases its mechanical energy. It can only rotate within a preset circumferential direction and a preset angular range. This spatial restriction mechanism prevents the state transition component 200 from undergoing unintended axial movement or radial deviation during high-speed operation. This ensures that the second conduction channel 220 on it can maintain a controlled relative position change with the first conduction channel 125 on the sealing seat 100 (i.e., the base component 110 and the mounting base 120) during dynamic rotation, ensuring that the airflow channel can achieve low-resistance complete overlap or complete misalignment closure.

[0065] In addition, such as Figure 4 and Figure 5 As shown in the assembly relationship, the precise spatial fit between the rotary fitting component 122 and the mounting cavity 123 allows the axial and radial forces on the state transition component 200 to be evenly distributed and transmitted to the base structure of the rotary fitting component 122 and the mounting base 120 through surface-to-surface contact of the structural surfaces when subjected to differential pressure loads from the external environment. This force transmission path avoids warping deformation of the sealing surface or abnormal wear of moving parts caused by local stress concentration. Following the laws of fluid mechanics, as the pressure of the environmental medium continues to increase, the slight axial deformation tendency of the base component 110 and the mounting base 120 will further force the state transition component 200 to press tightly against the static sealing surface of the sealing seat 100. Thus, this device achieves a flexible rotational switching channel function while also taking into account the "tighter with increasing pressure" sealing effect, where the normal contact pressure increases synchronously with the medium pressure. Overall, the sealing seat 100 not only provides a reliable rotational guide surface and installation space for the state transition component 200, but also maintains good structural rigidity and dynamic and static sealing consistency under high pressure environment, laying a reliable structural foundation for the automatic blocking of the airflow channel and long-term reliable sealing.

[0066] When the device enters a high-pressure environment and triggers the drive mechanism, the state transition element 200 rotates under the action of the elastic drive element 300. The second conduction channel 220 gradually deviates from the positions of the first conduction port 111 and the second conduction port 121 until it is completely misaligned. At this time, the second conduction channel 220 is no longer connected to the first conduction port 111 and the second conduction port 121. The first conduction port 111 and the second conduction port 121 are respectively blocked by a portion of the body of the state transition element 200, thereby cutting off the airflow channel and achieving isolation from the environmental medium. By setting the second conduction channel 220 between the first conduction port 111 and the second conduction port 121, and using the rotation of the state transition element 200 to achieve connection or closure, this embodiment can achieve reliable control of the airflow channel without the need for an additional valve core or complex flow channel structure. Meanwhile, under the pressure of the ambient medium, the adhesion force between the state transition component 200 and the mounting base 120 and the base component 110 is further increased, making the sealing interface around the conduction port tighter, effectively preventing high pressure medium from leaking through the pores, and improving the overall sealing performance and device reliability.

[0067] The dynamic and static sealing interface of the present invention specifically refers to the contact area formed by the contact between the inner side of the base component 110 and the static sealing surface of the mounting base 120 in the sealing seat 100 in a static state and the end face of the state conversion component 200 in a rotatable state. The sealing seat 100 has a base component 110 on the high-pressure side, a mounting base 120 on the low-pressure side, and a mounting channel 130 that penetrates the overall assembly thickness. The base component 110 and the mounting base 120 are fixed to the external flange of the equipment to be sealed by fasteners passing through the mounting channel 130 to establish a support relationship. When the ambient medium is at normal or low pressure, the state transition element 200 is in the first position, connecting the second conductive channel 220 on the state transition element 200 with the first conductive channel 125. When the elastic energy storage element 330 releases its mechanical potential energy and is pulled by the traction element 340 to complete its rotation, the state transition element 200 is in the second position, blocking the airflow channel 125 by part of the body of the state transition element 200. During the pressure-bearing process when the airflow channel is blocked, the pressure differential load generated by the high-pressure medium in the external environment is applied to the bearing end faces of the sealing seat 100 and the state transition element 200. This pressure differential load is converted into a normal clamping force that forces the dynamic and static sealing interfaces to adhere to each other, causing the end face adhesion pressure to increase with the increase of the external ambient medium pressure, forming a high-pressure anti-permeability adaptive sealing characteristic that becomes tighter under pressure. Further, please refer to Figure 4 The inner side of the state transition member 200 is provided with a mounting groove 210 for accommodating the elastic drive member 300; see also Figure 6 The elastic drive member 300 includes a fixed block 310 and a sliding trigger member 320 disposed within the fixed block 310 (see [link]). Figure 4An elastic energy storage element 330 is provided between the fixing block 310 and the side wall of the mounting groove 210 (see...). Figure 4 and Figure 6 Furthermore, the side wall of the mounting groove 210 has a through hole, and a traction member 340 is provided in the through hole, which passes through the elastic energy storage member 330 and the fixing block 310 and is connected to the sliding trigger member 320 (see...). Figure 6 ).

[0068] In a further embodiment of the present invention, the inner side of the state transition member 200 is provided with a mounting groove 210, which is arranged along the axial or circumferential direction of the state transition member 200 to accommodate the elastic drive member 300 and limit and guide its movement.

[0069] Please see Figure 6 The elastic drive component 300 includes a fixed block 310 and a sliding trigger component 320 disposed within the fixed block 310. The fixed block 310 is fixedly installed in the mounting groove 210 and is disposed opposite to the side wall of the mounting groove 210, so that the fixed block 310 remains in a stable position during the operation of the device and does not shift with the rotation of the state transition component 200. The sliding trigger component 320 can slide relative to the fixed block 310 along a preset sliding channel 312, and its sliding direction is consistent with the extension direction of the first guide channel 311, so that the main action of the elastic drive component 300 is completed along the sliding channel 312. An elastic energy storage component 330 is provided between the fixed block 310 and the side wall of the mounting groove 210. The elastic energy storage component 330 is in a compressed state in the initial state of the device, and is used to provide elastic potential energy for the subsequent rotation of the state transition component 200. To facilitate the transmission of elastic force to the state transition member 200, a through hole is provided on the side wall of the mounting groove 210. The traction member 340 passes through this through hole and sequentially passes through the elastic energy storage member 330 and the fixing block 310, connecting with the sliding trigger member 320. The traction member 340 enables the elastic energy storage member 330 to transmit elastic force via the sliding trigger member 320 to the rotating structure inside the state transition member 200 when released, thereby driving the state transition member 200 to rotate.

[0070] Please see Figure 7 In a low-pressure environment, the sliding trigger 320 is held in the preset position of the fixed block 310 under external constraints, the elastic energy storage component 330 is compressed and in an energy storage state, and the state transition component 200 maintains its initial angle. When the high-pressure environment medium enters the drive area through the pressure trigger valve 350, an axial thrust is applied to the sliding trigger 320, causing the sliding trigger 320 to move away from its original position. At this time, the elastic energy storage component 330 is released from its constraints and begins to extend. Through the traction component 340, it drives the relative movement of the rotating structure inside the sliding trigger 320 and the state transition component 200, thereby pushing the state transition component 200 to rotate and realize the closure of the airflow channel.

[0071] In this embodiment, by providing an installation groove 210 inside the state transition member 200, the drive structure is compactly arranged inside the state transition member 200, which not only reduces the axial dimension of the device, but also makes the movement of the elastic drive member 300 more controllable, achieving an automatic sealing effect that matches the environmental medium pressure, and further improving the stability and reliability of the device under high pressure.

[0072] The mounting groove 210 inside the state transition member 200 is formed as an arc-shaped limiting groove structure extending circumferentially along the interior of the state transition member 200. The fixing block 310 is connected to the bottom wall of the inner side of the mounting base 120 by fasteners 124, allowing the mounting base 120 to rotate relative to the state transition member 200. Through the clearance space design of this arc-shaped limiting groove structure, the fixing block 310 is accommodated inside the cavity trajectory of the mounting groove 210 when the state transition member 200 rotates circumferentially, without physical interference with the rotating component. The traction member 340 is configured as a flexible, high-strength multi-strand steel wire rope or a hinged transmission link that can adapt to changes in the motion space, and one end of the traction member 340 is connected to the sliding trigger member 320, while the other end is fixedly connected to the protruding block at the end of the inner wall of the mounting groove 210. When the external fluid thrust does not reach a set threshold, the sliding trigger 320 is inserted into the locking channel 112 to keep the elastic energy storage member 330 in an energy storage state. When the sliding trigger 320 is subjected to fluid thrust and slides out of the locking channel 112, it is at the energy release end stop position, so that the elastic energy storage member 330, which is released from its restraint and extends, is rotated by the traction member 340 through the traction state conversion member 200. Preferably, see Figure 4 As shown, the base component 110 located on the environmental medium side of the device is provided with a fluid inlet communicating with the outside, and a snap-fit ​​channel 112 is formed by a circumferential recess on its inner side; wherein, the snap-fit ​​channel 112 is used to mechanically snap and limit the sliding trigger component 320 with axial single degree of freedom sliding under a preset low pressure condition; and, along the medium flow direction, a pressure drainage channel 360 for directional introduction of high pressure environmental medium is connected to the inlet side of the snap-fit ​​channel 112, and a pressure trigger valve 350 is set on the medium transmission path of the pressure drainage channel 360, thereby switching between blocking and connecting states based on the environmental pressure jump.

[0073] In a further embodiment of the present invention, a snap-fit ​​channel 112 is recessed inside the base member 110, which serves as the basic support structure. The snap-fit ​​channel 112 extends circumferentially along the base member 110 and is aligned with the sliding trajectory of the sliding trigger member 320 in the built-in elastic drive member 300; wherein, the snap-fit ​​channel 112 is used to mechanically snap and radially limit the end of the sliding trigger member 320 inserted therein under normal pressure or low pressure initial operating conditions of the device.

[0074] Specifically, in the assembled state without high-pressure triggering, as the elastic energy storage component 330 is compressed to a preset energy storage limit, the front end of the sliding trigger 320 is inserted circumferentially into the internal channel of the locking channel 112. Under this mechanical constraint, the sliding trigger 320 is locked in the initial locked position, allowing the elastic energy storage component 330 to stably maintain a high potential energy under pressure, thereby forcing the state transition component 200 to remain stationary in the circumferential degree of freedom, maintaining the airflow channel at the initial angle of complete overlap and opening. This physical interference limiting of the sliding trigger 320 by the locking channel 112 can prevent the state transition component 200 from unexpectedly rotating and failing due to high-frequency vibration or slight pressure fluctuation pulses in complex low-pressure environments.

[0075] Furthermore, along the direction of medium directional introduction, the base component 110 is also provided with an internal pressure equalization and distribution channel communicating with the pressure diversion channel 360. This pressure diversion channel 360 and the internal pressure equalization and distribution channel together serve as an external fluid communication path, used to guide the high-pressure environmental medium to synchronously enter the blind ends of each snap-fit ​​channel 112 under specific operating conditions, and act on the end faces of the corresponding sliding trigger elements 320. A pressure trigger valve 350 is integrated in series along this fluid transmission path; the input end of the pressure trigger valve 350 is open and connected to the external environmental medium, while the output end is connected to the internal space of the snap-fit ​​channel 112, thereby performing real-time flow control or cut-off control based on whether the environmental medium pressure value exceeds a preset safety threshold. Preferably, the pressure trigger valve 350 can be a mechanical pure water overflow valve, a spring-loaded safety valve, a constant pressure rupture disc, a shear pin pressure reducing valve, or a pilot-operated mechanical pressure control valve—a purely mechanical sensing and actuation valve that does not require external electrical signal intervention.

[0076] In the initial operating condition of the device in air or other low-pressure environments, the pressure trigger valve 350, integrated into the medium transmission path of the pressure drainage channel 360, remains in a closed state due to the environmental pressure difference condition that has not reached the preset trigger threshold. Under this restricted state, the external environmental medium cannot penetrate the pressure drainage channel 360 along the introduction direction and enter the locking channel 112 formed by the recess inside the base component 110, so that the pressure-bearing end face of the sliding trigger 320 with axial single degree of freedom sliding is protected from the normal thrust of the fluid. Through the radial limit applied to the sliding trigger 320 by the wall of the locking channel 112, the sliding trigger 320 is always firmly inserted into the locking channel 112 and maintains a mechanical locking state, thereby ensuring that the elastic energy storage component 330 on the downstream force transmission link stably maintains a high potential energy pressure pre-tightened state, and finally restricts the state conversion component 200 to remain at the preset initial rotation angle, so as to ensure that the airflow channel is in a completely overlapping and connected state.

[0077] See Figure 8As shown, when the device submerges into a high-pressure operating environment such as seawater, and the external environmental medium pressure continuously increases and exceeds the trigger safety threshold calibrated by the pressure trigger valve 350, the pressure trigger valve 350 is controlled to open and conduct. At this time, the high-pressure environmental medium flows directionally into the blind end of the locking channel 112 along the connected pressure drainage channel 360, and directly acts normally on the pressure-bearing end face of the sliding trigger 320 to form a large fluid thrust tangentially / circumferentially outward in the channel. When this fluid thrust overcomes the static mechanical locking resistance between the sliding trigger 320 and the inner wall of the locking channel 112, the sliding trigger 320 slides out of the opening of the locking channel 112 along the sliding channel 312, thereby releasing the restriction on the elastic drive 300. Under this state switch, the elastic energy storage component 330 quickly releases the pre-stored elastic mechanical potential energy, and pulls the drive state conversion component 200 to overcome the static friction of the end face and rotate circumferentially, causing the internal airflow channel to be relatively misaligned and closed.

[0078] By creating a circumferential snap-fit ​​channel 112 on the base component 110, which serves as the main load-bearing element, and directionally introducing the high-pressure environmental medium into this channel 112 via a pressure trigger valve 350 to directly act on the sliding trigger 320, this specific structure and flow path configuration allows the pressure jump of the environmental medium itself to become the power source for triggering and executing the built-in drive mechanism, eliminating dependence on complex external power units. Simultaneously, by configuring the pressure trigger valve 350 in series along the main medium introduction path, its set dead zone effectively prevents the drive mechanism from unexpectedly and frequently operating under low-pressure conditions or high-frequency, small-pressure fluctuations. This anti-disturbance design significantly reduces abnormal mechanical wear caused by ineffective movements between the state transition component 200 and the dynamic and static sealing surfaces, improving the long-term operational stability and lifespan of the entire device in complex, variable-pressure environments such as deep seas.

[0079] In a further embodiment of the present invention, see Figure 4 As shown, the fixing block 310, which serves as the support origin of the elastic drive component 300, is fixedly installed on the inner wall of the mounting base 120 based on the fastener 124. Even under complex operating conditions such as sudden changes in high-frequency environmental pressure or circumferential rotation of the state transition component 200, the fixing block 310 maintains its spatial position and does not shift. In this fixed state, the fixing block 310 reliably receives and counteracts the axial reaction force generated by the elastic energy storage component 330 during pre-compression and energy release along the axial force transmission path.

[0080] Preferably, the fixing block 310 can be a support base, a force-bearing boss, a support corner post, or a reaction base integrally cut and formed.

[0081] See Figure 5Along the assembly axis of the device, a partial area of ​​the base component 110 is fitted with a sealing component 113 that precisely matches the outer contour of the fixing block 310. The sealing component 113 may specifically be a flange cover, a threaded limit sealing plug, an end cover with a guide hole, or a snap ring limit baffle.

[0082] See Figure 5 The closure 113 is detachably fitted onto the main body of the base component 110 via mechanical fastening, and forms a corresponding end face abutment with the fixing block 310 in the axial assembly position. By arranging the closure 113, on the one hand, the local open gap at the assembly interface between the fixing block 310 and the base component 110 is sealed, and on the other hand, a normal solid sliding guide and limiting space is constructed for the subsequently embedded sliding trigger component 320.

[0083] Specifically, regarding the internal guiding features, a second guide channel 114 is circumferentially formed in the main structure of the closure 113. The inner wall of the second guide channel 114 forms a fitting gap with the outer edge surface of the sliding trigger 320, which guides the movement direction of the sliding trigger 320 after the mechanical engagement is released. The end of the sliding trigger 320 slides and unlocks within the second guide channel 114, thereby limiting the overall movement trajectory to a preset trajectory and preventing off-center loading, radial runout, or friction jamming.

[0084] In addition, see Figure 6 A first guide channel 311 is synchronously recessed at the bottom of the fixed block 310. After the axial splicing and assembly of each component is completed, the first guide channel 311 and the second guide channel 114 on the closure 113 are aligned and connected at their axial extension geometric centers, thus forming a through sliding channel 312. This sliding channel 312 is essentially formed by the joint enclosure of the inner part of the groove interface of the fixed block 310 and the part of the groove interface of the closure 113. It not only serves as a cavity to accommodate the sliding trigger 320, but also completely limits the overall circumferential sliding stroke of the sliding trigger 320 through the end faces at both ends of the channel. Preferably, the sliding channel 312 is constructed as an arc-shaped slide or a straight slide extending circumferentially along the device. To reduce the risk of motion interference or jamming of the sliding trigger 320 during sliding, the sliding channel 312 is most preferably a straight structure (see Figure 6 Under the initial locking condition of the device in an atmospheric or low-pressure environment, the second slide bar 323 of the sliding trigger 320 (see...) Figure 6 ) penetrating the second guide channel 114 (see Figure 5 The elastic energy storage element 330 is inserted into the locking channel 112 to form a mechanical lock, while the remaining part of its body is disposed inside the sliding channel 312; in this mechanically limited state, the elastic energy storage element 330 maintains a high potential energy compression and energy storage state (see...). Figure 7 ).

[0085] See Figure 8 As shown, when the external high-pressure environment medium flows in directionally through the opened pressure drainage channel 360 and forces the sliding trigger 320 to overcome mechanical resistance and disengage from the locking channel 112 with a large normal thrust, the sliding trigger 320, guided by the first guide channel 311 in the fixed block 310 and the second guide channel 114 on the sealing member 113, slides along the sliding channel 312 to unlock and release. Accompanying this controllable sliding displacement, the elastic energy storage member 330 gradually and smoothly releases the stored elastic mechanical potential energy, thereby pulling the state conversion member 200 through the traction member 340 to complete the circumferential rotation action of the preset angle.

[0086] In the guiding architecture of this embodiment, the coordinated operation of the fixed block 310, the sealing member 113, and the internal connecting guide channel ensures that the sliding trigger 320 is always confined to a preset movement trajectory throughout the entire dynamic cycle of high-pressure triggering and rapid energy release. This limiting and anti-deviation design avoids radial swaying and mechanical off-center loading jamming caused by rapid impact of high-pressure medium or nonlinear release of the elastic energy storage member 330. Simultaneously, this modular channel architecture with a clearly defined mechanical stroke endpoint facilitates efficient manual push-in reset operations of the sliding trigger 320 and the elastic energy storage member 330 along the sliding channel 312 after system depressurization and disassembly, meeting the maintenance requirements for high-frequency reusable equipment.

[0087] Preferably, the sliding trigger 320 can be a fluid-force-receiving and mechanically limiting component that can slide smoothly within the channel under the action of fluid thrust, such as a stepped plunger, a stepped guide piston, a stepped shaft, or a pressure-release locking pin. Preferably, the shape of the sliding trigger 320 is a slider that matches the structure of the sliding channel 312.

[0088] against Figure 6 The sliding trigger 320 shown has a specific mechanical configuration, which adopts a three-section composite structure. It mainly includes a centrally located supporting body, namely the movable element 321, and a first slide rod 322 and a second slide rod 323, coaxially and integrally formed at both ends of the circumferential extension trajectory of the movable element 321. The first slide rod 322, the second slide rod 323, and the engaging channel 112 (see...) Figure 4 and Figure 5 Maintain alignment; in particular, when the device is in Figure 7 When the low-pressure locking condition is shown, the second slide bar 323 at the front end passes through the internal cavity of the second guide channel 114 in the circumferential direction and is inserted into and radially limited in the inner hole of the locking channel 112, which improves the anti-disengagement reliability of the device when it is subjected to high-frequency mechanical disturbances.

[0089] Based on the structural architecture of the above-described embodiment, the fixing block 310, serving as an internal support node of the elastic drive component 300, is fixedly installed on the inner wall of the mounting base 120 using fasteners 124. After assembly, the fixing block 310 remains stationary in spatial position under complex transformer operating conditions, preventing displacement and thus providing stable installation support and a force origin for the linear sliding of the sliding trigger component 320 and the potential energy accumulation of the elastic energy storage component 330. Along the axial assembly direction, a detachable and fitted sealing component 113 is provided on the outer side of the fixing block 310 at the position corresponding to the base component 110. The sealing component 113 and the end of the fixing block 310 are connected with high strength through a mechanical fastening method. This structure ensures the structural sealing of the internal drive area and improves the maintenance efficiency for later disassembly and assembly or high-frequency maintenance in extreme operating environments such as deep sea.

[0090] A second guide channel 114 is formed inside the body of the closure member 113 along the movement direction of the sliding trigger member 320, and a first guide channel 311 is simultaneously recessed on the inner side of the bottom of the fixing block 310. In the assembled state, the inner wall of the first guide channel 311 and the inner hole surface of the second guide channel 114 are aligned, thereby jointly enclosing and defining a sliding channel 312, which provides a guiding structure for the high-speed reciprocating movement of the sliding trigger member 320. Through the above-mentioned spatial restriction structure, the sliding trigger member 320 is restricted from performing controlled sliding movement along the sliding channel 312 when subjected to the reaction force of the elastic energy storage member 330, avoiding radial offset, mechanical jamming, or unexpected rotational failure caused by off-center loading.

[0091] Based on dynamic operating condition analysis, when the external high-pressure environment medium experiences a pressure jump and flows directionally into the pressure-triggered valve 350 through the fluid-connected pressure diversion channel 360, the pressurized sliding trigger 320 is controlled to complete the tripping unlocking or reverse reset locking action within the sliding channel 312. Throughout the entire dynamic triggering and displacement cycle, the movement direction and axial sliding stroke of the sliding trigger 320 are guided by the first guide channel 311 and the second guide channel 114. This structural design not only ensures that the potential energy release process of the elastic drive component 300 is free from lateral disturbances and is more stable and reliable, but also ensures that the state transition component 200 in the subsequent transmission link can obtain a stable and controllable driving thrust along the force axis when controlled triggering, thereby improving the consistency of the overall actuator's action response under complex environmental conditions and its long-term operational reliability throughout its entire life cycle.

[0092] Prior art document CN101208136A discloses a diaphragm locking valve, which relies on continuous environmental water pressure to cause elastic deformation of the flexible diaphragm, thereby driving the locking pin to release the rotating valve disc. An objective problem with this prior art is that the flexible diaphragm is prone to fatigue damage or false triggering under long-term pressure or encountering small pressure pulsations in the pipeline network. Furthermore, the rotating valve disc is prone to force vibration under unilateral water flow impact, resulting in insufficient cut-off reliability under high-pressure sudden changes. To overcome these defects, this invention adopts a fluid push-unlock and snap-fit ​​composite architecture. The pressure diversion channel 360 is used to guide the fluid thrust of the external high-pressure medium to the triggering part inside the sealing seat 100. The pressure trigger valve 350 is used to control the conduction of the high-pressure medium when the environmental medium pressure exceeds a preset threshold. The sliding trigger 320 is used to release the mechanical limit on the elastic energy storage element 330 under pressure. Under normal or low pressure conditions, the sliding trigger 320 is inserted into the snap-fit ​​channel 112. Under high-pressure triggering conditions where the external environmental medium pressure reaches a set threshold, the pressure trigger valve 350 is opened, and the sliding trigger 320 is disengaged and unlocked along the sliding channel 312 by fluid thrust, releasing the elastic potential energy of the elastic energy storage component 330. The sliding trigger 320 has a centrally arranged movable element 321, a first slide rod 322, and a second slide rod 323, giving the sliding trigger 320 the motion constraint characteristic of smooth sliding along the circumferential direction / sliding channel 312. During assembly, the sealing seat 100, which serves as the basic load-bearing component, is first fixedly installed in the preset installation position of the external equipment through the circumferentially through installation channel 130. Through this positioning assembly, the first guide port 111 on the base component 110 is aligned and connected with the external equipment medium pipeline, and simultaneously, the fluid input end of the pressure drainage channel 360 is directly connected to the external environmental medium pressure source. When the entire device is in its initial operating condition under normal or low pressure, the pressure trigger valve 350, which is connected in series with the pressure drainage channel 360, remains in a closed state due to the pressure difference condition not reaching the safety threshold. Under this specific condition, the sliding trigger 320, which has a single axial degree of freedom, is limited and locked in the blind hole inside the snap-fit ​​channel 112 by overcoming the elastic preload of the elastic energy storage component 330. Due to the limiting effect of this static mechanical force transmission link, the state transition component 200 is stably locked in the preset first working position in terms of rotational degree of freedom; at this time, the second conduction channel 220 opened on the body of the state transition component 200 is completely aligned with the first conduction port 111 on the base component 110 and the second conduction port 121 on the mounting base 120 in terms of axial projection. With the above-mentioned overlapping and through flow path configuration, the exchange medium required by the external equipment can pass through the combined first conduction channel 125 with low flow resistance, thereby establishing and maintaining the normal bidirectional through flow state of the medium.

[0093] As the operating conditions dynamically change, when the pressure of the external environment medium continuously increases and exceeds the preset trigger threshold calibrated by the pressure trigger valve 350, the pressure trigger valve 350 is controlled and opens. Under this triggering mechanism, the high-pressure environment medium flows directionally into the bottom chamber of the locking channel 112 along the through pressure drainage channel 360, thereby applying an axial fluid normal thrust to the pressure-bearing end face of the sliding trigger 320. Once this fluid force overcomes the static mechanical locking resistance, the sliding trigger 320 slides out of the opening of the locking channel 112 along the sliding groove 312, thereby releasing the mechanical limit of the elastic drive 300; then, the unblocked elastic energy storage 330 quickly releases the pre-accumulated mechanical elastic potential energy, and pulls the state conversion 200 along the outer peripheral guide surface of the rotating mating member 122 to perform a preset angle of circumferential deflection rotation through the internal traction link. The controlled rotation causes the second conduction channel 220 to be relatively misaligned with the first conduction port 111 and the second conduction port 121, cutting off and closing the internal airflow channel by blocking the wall. At the same time, the continuously increasing external high-pressure environment medium acts directly and synchronously on the mating end faces of the sealing seat 100 and the state transition component 200, as well as the surrounding dynamic and static sealing interfaces; following the basic laws of fluid mechanics, this pressure differential load forces each sealing part to generate additional contact and clamping force along the normal direction, constructing an adaptive sealing effect where the end face contact pressure increases in the same frequency as the environmental pressure, becoming tighter with increasing pressure. After the external environmental medium pressure gradually decreases and returns to the normal operating baseline range, based on the pressure relief and reset control of the pressure trigger valve 350, and with the manual push of the extended elastic drive 300 in the reverse direction along the channel to perform a mechanical reset action, the traction state conversion component 200 overcomes static resistance, rotates in the reverse direction, and re-anchors itself to the initial working position; with this state restoration as a sign, the internal flow path of the device overlaps again, fully restoring the low-resistance conduction state of the medium, thus completing a complete working cycle from opening, high-pressure trigger cutoff to pressure relief and reset reuse.

[0094] Based on the structural configuration and operational causal logic of this embodiment, this device utilizes a single medium pressure jump as a trigger source design principle. Under the premise of completely eliminating complex external electrical or hydraulic power control systems, it achieves rapid automatic switching of the medium channel flow state and reliable isolation sealing. When the environmental medium pressure rises abnormally, such as during deep-sea diving or sudden changes in pipeline network pressure, the overall mechanism can respond quickly, switching from a full-bore conducting state to a completely isolated closed state, effectively preventing leakage of high-pressure corrosive media and the risk of overpressure rupture damage to the protected internal system. Simultaneously, it deeply utilizes the natural back pressure of the external environmental medium itself as a power source to enhance the adhesion between the dynamic and static sealing interfaces, achieving a self-sealing effect that tightens under increasing pressure, improving the overall device's anti-disturbance and leak-proof reliability under complex conditions of extreme high pressure or high-frequency pressure pulsation. Furthermore, this device exhibits a compact axial modular structure, and the mechanical action force transmission path is clear and defined, overcoming the dependence of traditional non-contact dry gas seals on high-speed rotation centrifugal force of the equipment shaft system or external auxiliary air supply systems. This technical solution is suitable for static non-rotating equipment, deep-sea equipment, and confined cabin environments. It has good engineering application value in fields such as deep-sea fluid pipeline control, safety protection of underwater exploration equipment, and pressure adaptive sealing at all water depths.

[0095] This invention is a device based on environmental medium pressure sealing and airflow channel control, which is suitable for various application scenarios where there are sudden changes in environmental pressure or switching of operating conditions.

[0096] Specifically, it can be applied to equipment such as marine equipment, underwater detection devices, deep-sea sensor hulls, and underwater operation tools that require frequent switching between air and high-pressure liquid environments. It automatically closes airflow channels and achieves reliable sealing during water entry or descent. It is also suitable for chemical plants, energy equipment, underground engineering projects, and sealed containers where external high-pressure gas or liquid media exist, preventing backflow or seepage of environmental media into the equipment. Furthermore, this technology can be applied to aerospace, rail transportation, and special industrial equipment. As a safety sealing and channel control solution that requires no continuous external power and can adapt to environmental pressure, it is particularly suitable for applications with high requirements for compact structure, reliability, and long-term maintenance-free performance.

[0097] To further explain, in order to reduce dependence on high-speed non-rotating conditions and external media supply, self-sealing technology has been introduced into related fields. It utilizes the pressure of the medium itself to drive the sealing element to produce elastic deformation, thereby further enhancing the sealing contact force as the system pressure increases, achieving a reliable sealing effect of "tightening under pressure." It is currently widely used in industrial scenarios such as steam turbines and high-temperature, high-pressure pipelines.

[0098] In traditional forced sealing structures, the medium pressure difference typically tends to reduce the pre-tightening sealing pressure on the sealing surface. To prevent leakage under pressure differential, high structural and manufacturing costs are usually required to maintain the necessary initial pre-tightening force. In contrast, self-tightening sealing (self-sealing) technology can utilize the medium pressure directly or indirectly acting on the sealing element, causing the sealing pressure to automatically increase as the medium pressure rises. However, conventional self-sealing structures mainly function as passive seals and cannot actively control the opening and closing of the medium passage according to changes in ambient pressure.

[0099] Furthermore, some existing non-contact dynamic sealing solutions (such as self-sealing steam-supplying shaft seal systems) rely primarily on their own fluid media during the later stages of stable equipment operation for self-sealing. However, during the initial startup or operation phase, since the system has not yet generated its own working medium, it still needs to depend on an external auxiliary gas source. This approach increases system complexity and operating costs, and carries the risk of introducing external media into the equipment.

[0100] The pressure adaptive sealing control device provided by this invention requires no external auxiliary air source or power system during the entire process of equipment startup, operation, and condition switching. This pressure adaptive sealing control device directly uses the pressure change of the ambient medium itself as the trigger condition and driving force. When the ambient medium pressure reaches a set threshold, the internal transmission action is triggered through a mechanical structure to actively cut off and isolate the airflow channel.

[0101] After the airflow channel is closed, the pressure adaptive sealing control device of the present invention further utilizes the high pressure differential of the external environmental medium, causing it to act directly on the end faces of the sealing seat and the state transition component. The high pressure differential load of the environmental medium is directly converted into a force that forces the dynamic and static sealing interfaces to press against each other along the normal direction, forming an adaptive sealing effect in which the adhesion force increases synchronously with the environmental pressure.

[0102] This invention combines an active channel cutoff mechanism based on environmental pressure with an adaptive compression seal, avoiding dependence on external auxiliary air sources and related control systems. This technical solution overcomes the limitation of conventional self-tightening seal structures having only one function, and solves the problem of some non-contact dynamic seals relying on external air sources in the initial stage. While simplifying system configuration, it achieves self-driven and adaptive sealing under variable pressure conditions.

[0103] Example 2 This embodiment is a further improvement on embodiment 1, and repeated content will not be described again.

[0104] See Figures 1 to 8This invention provides a pressure-adaptive sealing control method based on environmental medium pressure sealing and airflow channel control. Existing sealing and channel control methods often employ manual control, timed control, or active adjustment based on sensors and control systems to achieve medium flow and pressure isolation. These methods typically rely on external power supply, signal acquisition, and control units. In complex environments or space-constrained applications, system integration is challenging, and control system failure can easily lead to abnormal sealing conditions and media leakage risks. Furthermore, traditional methods often maintain sealing effectiveness by offsetting or reducing pressure differentials. When environmental pressure continuously increases, this can adversely affect the sealing structure, making it difficult to achieve adaptive enhancement of sealing performance with pressure changes.

[0105] Pressure adaptive sealing control methods based on environmental medium pressure sealing and airflow channel control include: The sealing seat 100 with the first conduction channel 125 is installed in the position to be sealed, and the state conversion element 200 is set inside the sealing seat 100. When the ambient medium is at normal pressure, the second conduction channel 220 on the state conversion element 200 is connected to the first conduction channel 125 to form an internal and external medium conduction path. When the ambient medium pressure increases and triggers the pressure trigger valve 350, the ambient medium enters the locking channel 112 through the pressure diversion channel 360, releases the locking state of the sliding trigger 320, releases the elastic energy storage element 330 of the elastic drive element 300, drives the state conversion element 200 to rotate, and causes the first conduction channel 125 and the second conduction channel 220 to be misaligned and closed.

[0106] Furthermore, after the sliding trigger 320 is released from the latching state, it slides under the guidance of the first guide channel 311 and the second guide channel 114, and transfers the elastic potential energy of the elastic energy storage device 330 to the state transition device 200 through the traction device 340. Preferably, the traction device 340 can be a flexible steel wire rope, a high-strength metal cable, a hinged transmission link, or a mechanical tie rod, etc., which can adapt to changes in the motion space and convert linear thrust into tensile torque.

[0107] Furthermore, as the ambient medium pressure continues to increase, the mutual pressing between the base component 110, the mounting base 120, and the state transition component 200 causes the sealing interface adhesion force to increase synchronously, thereby improving the sealing performance.

[0108] Specifically, the sealing seat 100, which has a first conductive channel 125, is first installed at the interface or structural connection position of the equipment to be sealed, so that a stable installation relationship is formed between the sealing seat 100 and the part to be sealed. The state conversion component 200 is pre-assembled inside the sealing seat 100 and forms a rotatable engagement with the sealing seat 100 through the rotational engagement component 122, so that it can switch positions relative to the sealing seat 100 under different working conditions.

[0109] When the equipment is operating normally and the ambient medium is at normal pressure, the sliding trigger 320 is in the initial latched position within the latching channel 112, the elastic energy storage component 330 is in a pre-compressed or energy-storing state, and the state transition component 200 is held in the first working position by the elastic drive component 300. At this time, the second conduction channel 220 on the state transition component 200 is aligned and connected with the first conduction channel 125 on the sealing seat 100, forming a conduction path between the internal and external media, enabling the sealed equipment to perform normal media exchange or pressure balance.

[0110] When the pressure of the external ambient medium rises and reaches a preset threshold, the pressure trigger valve 350 is triggered and opened. The ambient medium enters the locking channel 112 through the pressure diversion channel 360, applying fluid thrust to the sliding trigger 320, causing the sliding trigger 320 to disengage from the locking channel 112. After disengaging, the sliding trigger 320 slides smoothly along the sliding channel 312 under the combined guidance of the first guide channel 311 in the fixed block 310 and the second guide channel 114 on the sealing member 113. At the same time, the elastic energy storage member 330 is released by the traction member 340.

[0111] As the elastic potential energy of the elastic energy storage component 330 is released, its elastic force drives the state conversion component 200 to rotate along the rotating mating component 122, causing the second conductive channel 220 to gradually deviate and eventually become misaligned with the first conductive channel 125, thereby cutting off the communication path between the internal and external media and realizing the automatic closure and sealing state switching of the channel.

[0112] As the ambient medium pressure continuously increases, the medium pressure acts on the base component 110, the mounting base 120, and the state transition component 200, causing them to press against each other axially or radially. This results in the sealing interface adhesion force increasing synchronously with the medium pressure. In this way, an adaptive sealing effect based on the ambient medium pressure itself is achieved, effectively improving the sealing reliability and safety of the device under high pressure or pressure fluctuation conditions without the need for additional external medium or complex control structures.

[0113] First, by using the ambient medium pressure as the trigger and driving source, automatic switching of the conduction channel and adaptive control of the sealing state are realized. This eliminates the need for rotating parts, external air sources, or complex pressure balancing systems, significantly simplifying the structure and control logic and reducing the difficulty of system integration and operating costs.

[0114] Secondly, the sliding trigger 320, the first guide channel 311, the second guide channel 114 and the elastic drive 300 work together to quickly and reliably drive the state conversion component 200 to switch from the conducting state to the closed sealing state when the ambient medium pressure reaches the set conditions. The response process is stable and controllable, avoiding the risk of leakage caused by human operation or external control failure, and improving the overall operational safety.

[0115] Furthermore, under conditions where the ambient medium pressure continues to rise, the base component 110, the mounting base 120, and the state transition component 200 form a mutual pressing relationship as the pressure increases, which synchronously enhances the sealing interface adhesion force, achieving a "tighter under pressure" self-sealing effect. This effectively suppresses medium leakage and prevents external impurities from intruding, making it particularly suitable for application scenarios with frequent pressure fluctuations or long-term high-pressure operation.

[0116] Finally, this method does not introduce additional media into the sealing process, thus avoiding interference with the internal media composition and operating state of the sealed system. It expands the applicability of sealing technology under various operating conditions and has good engineering application value.

[0117] It should be noted that the specific embodiments described above are exemplary. Those skilled in the art can devise various solutions inspired by the disclosure of this invention, and these solutions all fall within the scope of this invention and its protection. Those skilled in the art should understand that this specification and its accompanying drawings are illustrative and not intended to limit the scope of the claims. The scope of protection of this invention is defined by the claims and their equivalents. This specification contains multiple inventive concepts; terms such as "preferredly," "according to a preferred embodiment," or "optionally" indicate that the corresponding paragraph discloses an independent concept. The applicant reserves the right to file divisional applications based on each inventive concept.

Claims

1. A pressure adaptive seal control device, characterized by, include: The sealing seat (100) has at least one first conducting channel (125) spaced apart in the circumferential direction, and one side forms a static sealing surface for bearing the pressure of the ambient medium; A state transition component (200) is rotatably mounted on the sealing seat (100) and has a second conductive channel (220) adapted to the first conductive channel (125). The state transition component (200) can be rotated in a controlled manner within the sealing seat (100) so that the first conductive channel (125) and the second conductive channel (220) are in a first position of overlapping and communication or a second position of misalignment and closure. An elastic drive element (300), disposed inside the sealing seat (100), includes an elastic energy storage element (330) in a pressurized energy storage state and a sliding trigger element (320) that mechanically locks and limits the elastic energy storage element (330); and A pressure trigger valve (350) is provided on the pressure drainage channel (360) connecting the device to the external environment; When the ambient medium pressure reaches a set threshold, the pressure trigger valve (350) is turned on, guiding the high-pressure ambient medium into the pressure diversion channel (360) and applying a fluid normal thrust to the sliding trigger (320), thereby releasing the mechanical limit on the elastic energy storage device (330); the elastic energy storage device (330) releases elastic potential energy and pulls the state conversion device (200) to rotate, so that the first conduction channel (125) and the second conduction channel (220) are relatively misaligned to block the airflow channel.

2. The apparatus of claim 1, wherein, The sealing seat (100) specifically includes a base component (110) and a mounting base (120) fixedly assembled on the base component (110). The base component (110) and the mounting base (120) together enclose and define the mounting cavity (123). The mounting base (120) is provided with a rotating fitting member (122) extending axially. The inner edge of the state conversion member (200) is sleeved on the outer peripheral surface of the rotating fitting member (122) and rotates coaxially in the mounting cavity (123) based on the guidance of the rotating fitting member (122).

3. The apparatus of claim 1 or 2, wherein, The first conductive channel (125) is formed by the first conductive port (111) and the second conductive port (121) that respectively axially penetrate the base component (110) and the mounting base (120) and are connected in the axial projection. The state transition component (200) is embedded between the base component (110) and the mounting base (120), and the second conductive channel (220) simultaneously connects the first conductive port (111) and the second conductive port (121) when it is cut into the first position.

4. The apparatus according to any one of claims 1 to 3, characterized in that, The base component (110) has a circumferential recessed locking channel (112) and the pressure drainage channel (360) is connected to the locking channel (112). Under initial normal pressure or low pressure conditions, one end of the sliding trigger (320) is inserted into the locking channel (112). When the high pressure environment medium enters the locking channel (112) through the conducting pressure trigger valve (350), the sliding trigger (320) slides out of the locking channel (112).

5. The device of any one of claims 1 to 4, wherein, The state transition component (200) has an inner groove (210), and the elastic drive component (300) is entirely accommodated in the inner space of the groove (210); The elastic drive member (300) further includes a traction member (340) passing through the internal channel of the elastic energy storage member (330); one end of the traction member (340) is connected to the sliding trigger member (320), and the other end is fixedly connected to the side of the protruding block inside the state transition member (200) so as to pull the state transition member (200) to rotate circumferentially when the elastic energy storage member (330) is extended and released.

6. The device of any one of claims 1 to 5, wherein, The elastic drive member (300) is provided with a fixing block (310), and the fixing block (310) is fixed to the mounting base (120) by fasteners (124); The fixing block (310) has a detachable closing part (113) on the outside corresponding to the assembly position of the base component (110). The closure (113) has a second guide channel (114) extending circumferentially inside, and the fixing block (310) has a first guide channel (311) recessed at the bottom inside. The first guide channel (311) and the second guide channel (114) are joined together to enclose and define the sliding channel (312), and the sliding trigger (320) is accommodated in the sliding channel (312).

7. The device of any one of claims 1 to 6, wherein, The sliding trigger (320) is a slider that matches the structure of the sliding channel (312), and includes a locator (321) and a first slide bar (322) and a second slide bar (323) located at both ends of the locator (321). The second slide bar (323) passes through the second guide channel (114) and is inserted into the snap-fit ​​channel (112); The first slide bar (322) and the movable element (321) are located within the sliding channel (312).

8. The apparatus according to any one of claims 1 to 7, characterized in that, The sealing seat (100) and the state transition component (200) are provided with through mounting channels (130). When the airflow channel is closed, the static sealing surface of the sealing seat (100) and the end face of the state conversion component (200) are pressed together by the pressure of the ambient medium.

9. A pressure adaptive sealing control method, characterized in that, The method includes: Under initial operating conditions, the elastic energy storage component (330) is mechanically locked and limited by the sliding trigger (320) to maintain the pressurized energy storage state of the elastic energy storage component (330) and restrict the rotation of the state transition component (200) on the sealing seat (100) to remain in the first position, so that the second conduction channel (220) on the state transition component (200) coincides and connects with the first conduction channel (125) on the sealing seat (100); When the ambient medium pressure reaches a set threshold, the pressure trigger valve (350) set on the pressure diversion channel (360) is turned on, and the high-pressure ambient medium is guided to apply fluid thrust to the sliding trigger (320) through the pressure diversion channel (360), forcing the sliding trigger (320) to release the mechanical limit on the elastic energy storage device (330); The elastic energy storage component (330) releases elastic potential energy and pulls the state conversion component (200) to rotate, causing the first conduction channel (125) and the second conduction channel (220) to be offset relative to each other to block the airflow channel; then the pressure difference load of the ambient medium directly acts and forces the dynamic and static sealing interfaces to press against each other along the normal direction to form an adaptive seal.

10. The method according to claim 9, characterized in that, The method further includes: The sliding trigger (320) is pushed by the fluid and slides out of the snap-fit ​​channel (112) in the sealing seat (100). The sliding trigger (320) slides within the sliding channel (312) defined by the first guide channel (311) and the second guide channel (114); The elastic energy storage component (330) releases elastic potential energy and pulls the state transition component (200) to rotate through the traction component (340) connected to the sliding trigger component (320).

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