Adaptive segmented gas drive screw disassembly and straight-through inflation system based on air pressure sequence control

Abstract

The application discloses a kind of self-adapting segmented gas drive screw disassembly and inflation system based on air pressure sequence control, including gas drive composite actuator, self-adapting tracking clamping mechanism and air pressure feedback control loop.Executive mechanism adopts stepped piston rod, and light shaft sealing section is separated in space with slotted guide section, and sealing element only rubs smooth cylindrical surface.Step piston rod front end is connected with clamping head with V-shaped guide inclined plane by elastic connecting piece, and cooperate with the linear guide-in section and spiral work section of segmented guide groove, realize "first linear alignment, after rotation disassembly" low-impact operation.Air pressure feedback control loop uses back pressure trigger sequence valve generated by stepped piston rod retreat dead point, realizes straight-through inflation switching;When reinstalling, through pressure regulating valve cooperates with pneumatic stall principle, automatically stops work in target torque range, realizes fixed torque locking.The application does not contain electronic components, with the advantages of intrinsic explosion protection, efficient inflation, self-adapting tracking and long service life.

Description

Technical Field

[0001] This invention relates to the fields of vehicle engineering, special equipment maintenance tools and pneumatic control technology, and in particular to an adaptive segmented air-driven thread disassembly and assembly and straight-through inflation system based on air pressure sequential control. Background Technology

[0002] With the continuous iteration of giant construction machinery and heavy aircraft, the maintenance of ultra-large volume, high-pressure tires has become a significant pain point in the field of safe production. Currently, these tires generally use Schrader high-flow valves, and the removal and installation of their valve cores and tire inflation operations mainly rely on core-inflation methods and mechatronic tools. However, existing technologies have the following systemic defects when facing extreme working conditions.

[0003] Firstly, spool-type inflation inherently presents a fluid congestion bottleneck. The Schrader valve stem, with its narrow fluid channel formed by a spring, sealing gasket, and center rod, can easily reach localized sonic velocity when supplied with high-pressure air from an external air compressor, causing congestion. This not only significantly reduces inflation efficiency, making it difficult to inflate large tires (often taking hours), but also generates strong aerodynamic noise and high back pressure, causing the air compressor to operate under high load for extended periods, potentially leading to overheating and shutdown.

[0004] Secondly, mining and underground work environments are rich in methane and coal dust, making tire inflation a high-risk operation. Fractures in the internal tire ply or fatigue micro-cracks in the rim can lead to structural failure during pressurization, causing the locking ring to be ejected with high kinetic energy, resulting in injury or death. Therefore, the industry urgently needs tire inflation devices with remote control capabilities. However, existing mechatronic assembly and disassembly workstations rely on electronic components such as servo motors, torque sensors, and PLC controllers, posing a risk of electrical sparks and making it difficult to pass intrinsically safe explosion-proof certification for underground coal mines.

[0005] Third, existing purely mechanical or simple pneumatic disassembly tools typically employ a rigid, direct-insertion logic when gripping valve cores. Because the initial angle of the valve core crossbeam is randomly distributed, the rigid gripper is prone to a hard impact with the crossbeam, leading to thread stripping and deformation, or even jamming the valve core inside the valve stem. Furthermore, when traditional tools complete reinstallation and removal, the reverse return motion of their screw mechanism causes the gripping head to rotate slightly in the opposite direction. This reverse loosening effect weakens the achieved locking torque, leaving a safety hazard of slow air leakage.

[0006] To address the aforementioned issues, there is an urgent need for a purely pneumatic system that requires no electronic components and combines efficient inflation with adaptive, non-destructive assembly and disassembly. Summary of the Invention To address the aforementioned technical shortcomings, the purpose of this invention is to provide an adaptive segmented air-driven thread disassembly and assembly and direct-through inflation system based on air pressure sequential control. This system mainly solves the technical problems in existing valve core disassembly and assembly and inflation systems, such as low efficiency due to core-driven inflation blockage, safety hazards of electronic components in explosion-proof environments, easy damage to threads due to rigid clamping and slow leakage due to loosening of the reverse belt, and short lifespan due to mutual constraints between sealing and guiding friction.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: This invention provides an adaptive segmented pneumatic thread disassembly and inflation system based on pneumatic pressure sequential control, comprising: A pneumatic composite actuator, located inside a quick-connect inflation head, includes an actuator cylinder and a stepped piston rod. The stepped piston rod includes a linear shaft sealing section and a slotted guide section. The front cover of the actuator cylinder is provided with a sealing element that slides and seals with the linear shaft sealing section. A guide sleeve communicating with the atmosphere is fixed to the outside of the front cover. The guide sleeve is nested outside the slotted guide section, and its inner wall is provided with a guide element. The guide element is fitted into a segmented guide groove on the outer circumference of the slotted guide section. An adaptive tracking clamping mechanism is located at the front end of the stepped piston rod, including a clamping head and an elastic connector. The clamping head is connected to the stepped piston rod through the elastic connector, and the biting end face of the clamping head is provided with a guide slope. It is configured to automatically track the target threaded part by storing energy through the elastic connector when the target threaded part is gripped and interference occurs, and to release the displacement compensation generated by the elastic connector when the device is pulled out, so that the clamping head can disengage before the stepped piston rod reverses its movement. The pneumatic feedback control loop, integrated into the main control valve group, includes a pressure regulating valve connected in series on the refill air supply path, configured to achieve constant torque locking using the pneumatic stall principle; it also includes a pneumatic sequence valve triggered by the back pressure of the rod chamber of the actuator cylinder, configured to achieve automatic switching of direct-flow inflation.

[0008] Preferably, the segmented guide groove includes a straight guide section at the front end and a spiral working section at the rear end; the straight guide section is configured to constrain the stepped piston rod to perform only axial displacement and not radial rotation during the stroke phase when the clamping head grips or disengages from the target threaded part.

[0009] Preferably, the straight inlet section and the spiral working section of the segmented guide groove are connected by a B-spline smooth transition curve.

[0010] Preferably, the actuator cylinder includes a rodless chamber and a rod chamber, and the pneumatic feedback control circuit is configured such that when the clamping head engages with the target threaded part, the actuator cylinder enters a pneumatic stall state, the air pressure in the rodless chamber increases and triggers the pneumatic reversing valve to automatically switch the air path to achieve forward and reverse rotation switching of the stepped piston rod.

[0011] Preferably, the trigger signal terminal of the pneumatic sequence valve is connected to the rod chamber pipeline of the actuator cylinder; configured to automatically open the direct charging channel to the outlet of the quick-connect charging head when the stepped piston rod retracts to the mechanical dead point and back pressure increases.

[0012] Preferably, the output air pressure threshold of the pressure regulating valve is calibrated to the cylinder thrust balance value corresponding to the safety locking torque of the target threaded part, so that the actuating cylinder enters a pneumatic stall state when the turning resistance reaches the standard.

[0013] Preferably, the gripping head is elastically connected to the stepped piston rod via an elastic connector, configured to achieve automatic tracking by storing energy through elastic compression when collision occurs during gripping, and at the moment the air source is cut off at the end of the operation, the elastic connector recovers before the stepped piston rod, releasing displacement by utilizing the time difference, pushing the gripping head forward and causing it to disengage from the target threaded part in a straight line.

[0014] Preferably, the optical axis sealing section is an optical axis section, the slotted guide section is a slotted guide section; the sealing element is a dynamic sealing ring, and the guide element is a guide pin.

[0015] Preferably, the clamping head is a V-shaped tracking clamping head, and its biting end face is provided with a V-shaped guide slope.

[0016] Preferably, the system is a purely pneumatic control system and contains no electronic components.

[0017] Beneficial effects: 1. Back pressure sequential control and high flow rate direct inflation improve inflation efficiency. This invention changes the traditional approach of "inflation with valve core". The system uses pure air pressure feedback. After the valve core is removed, the back pressure increase generated by the stepped piston rod reaching the dead point is used as a control signal to open the large-diameter pneumatic sequence valve. This allows the high-pressure airflow to bypass the valve core obstruction and flow directly into the tire, effectively eliminating fluid congestion bottlenecks, significantly shortening inflation time, and reducing air compressor load and energy consumption.

[0018] 2. Zero electronic components ensure inherent explosion-proof protection and safe remote operation. The system control loop (including logic switching and constant torque feedback) is entirely physically executed by air pressure, air volume, and spring stiffness, without any electronic components. This eliminates the risks of friction sparks, electromagnetic interference, and short-circuit heating at the source, meeting the explosion-proof certification requirements for explosive gas environments such as mines and underground operations. Operators can remotely control a single gas valve to complete the entire sequence of actions from a safe isolation zone, significantly reducing the risk of personnel injury.

[0019] 3. Pneumatic stall torque locking reduces the risk of thread stripping and breakage. This invention utilizes the static balance principle of fluid compressibility. During reinstallation, the axial thrust provided by the precision pressure reducing valve is balanced in real time with the frictional resistance torque generated when the valve core is screwed in (converted into axial counter-thrust). When the locking torque reaches the target range (approximately 0.34-0.57 Nm), the resistance counter-thrust and the pneumatic thrust tend to cancel each other out. The actuator cylinder smoothly enters the pneumatic stall state and stops working, achieving passive overload protection and effectively preventing thread overload, stripping, or breakage.

[0020] 4. Flexible passive tracking and time-difference release reduce the "reverse loosening" effect. An "axial floating spring + V-shaped surface" structure achieves flexible avoidance and energy storage, automatically aligning under pneumatic drive for low-damage blind insertion. At the moment the air supply is cut off at the end of the operation, the compressed floating spring recovers before the actuator cylinder, releasing displacement using the time difference. This pushes the clamping head forward, disengaging it in a straight line from the valve core groove. Subsequently, the reverse motion of the stepped piston rod is in a "suspended" state, preventing the helical reverse return motion from causing the clamping head to rotate slightly in the opposite direction. This effectively maintains the achieved locking torque and prevents slow leakage.

[0021] 5. Spatial separation of friction and sealing extends service life. This invention adopts a "stepped piston rod" design, which spatially isolates the "smooth shaft sealing section" that bears the high-pressure sealing function from the "grooved guide section" that bears mechanical guide wear. The dynamic sealing ring only comes into frictional contact with the smooth cylindrical surface, which greatly reduces the wear and heat generation of the sealing components and helps to solve the common industry defects of high leakage rate and short service life of compound action cylinders. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A schematic diagram of an adaptive segmented air-driven thread disassembly and inflation system based on air pressure sequential control is provided for an embodiment of the present invention. Figure 2 This is a schematic diagram of a pressure feedback control loop provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the cylindrical surface development of a segmented guide groove (including a B-spline transition section) provided in an embodiment of the present invention.

[0024] Reference numerals: 1-Quick-connect inflation head; 2-Actuating cylinder; 3-Rodless chamber; 4-Rod chamber; 5-Stepped piston rod; 6-Optical shaft sealing section; 7-Grooved guide section; 8-Front cover; 9-Seal; 10-Guide sleeve; 11-Guide component; 12-Segmented guide groove; 12a-Straight inlet section; 12b-B-spline smooth transition section; 12c-Helical working section; 13-Clamping head; 14-Elastic connector; 15-V-shaped guide slope; 16-Target threaded component; 17-Bypass side chamber; 19-Pneumatic directional valve; 20-Pressure regulating valve; 21-Pneumatic sequence valve; 22-Straight-through inflation channel; 23-Rod chamber back pressure signal pipeline; 24-Dead point back pressure signal pipeline; 25-Air source. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] This invention provides an adaptive segmented pneumatic thread unloading and inflation system based on pneumatic pressure sequential control, comprising a pneumatically driven composite actuator, an adaptive tracking clamping mechanism, a pneumatic pressure feedback control loop, and a main control valve group. This device uses a single air source 25 as both power and control signal, and its complete working cycle includes three stages: passive tracking thread unloading, back pressure switching inflation, and constant torque reloading.

[0027] like Figure 1 As shown, the pneumatic composite actuator is located inside the quick-connect inflation head 1, including an actuator cylinder 2 and a stepped piston rod 5. The actuator cylinder 2 has a rodless chamber 3 and a rod chamber 4. The stepped piston rod 5 has a stepped structure, including a rear-mounted optical axis sealing section 6 and a front-mounted slotted guide section 7. The front cover 8 of the actuator cylinder 2 is provided with a sealing element 9, specifically a dynamic sealing ring, that slides and seals with the optical axis sealing section 6. A guide sleeve 10, which is open to the atmosphere, is fixed to the outside of the front cover 8. The inner wall of the guide sleeve 10 is provided with a guide element 11, specifically a guide pin, which is fitted into a segmented guide groove 12 on the outer circumference of the slotted guide section 7.

[0028] Through the aforementioned stepped piston rod design, the optical shaft sealing section 6, which bears the high-pressure sealing function, and the slotted guide section 7, which bears mechanical guide wear, are spatially isolated from each other. The seal 9 only comes into frictional contact with the smooth cylindrical surface, effectively reducing the wear and heat generation of the seal and significantly improving the problems of high leakage rate and short life of the compound action cylinder.

[0029] Combination Figure 3As shown in the cylindrical development diagram, the segmented guide groove 12 is specifically divided into three sections, namely 12a, 12b, and 12c as marked in the figure: The straight inlet section 12a is located at the front end of the segmented guide groove 12, and its trajectory is parallel to the axis of the stepped piston rod. The straight inlet section 12a is configured such that during the initial and final stages of the gripping head 13 grasping or disengaging from the target threaded part 16, the guide member 11 and the stepped piston rod 5 only perform pure axial translation without radial rotation. The B-spline smooth transition section 12b connects the straight inlet section 12a and the helical working section 12c. Through the B-spline smooth curve, the motion trajectory of the guide member 11 smoothly transitions from a straight line to a helix, avoiding rigid impact or jamming during the transition of motion states. The helical working section 12c is located at the rear end of the segmented guide groove 12 and has a preset helix angle. The helical working section 12c is responsible for converting the axial displacement of the stepped piston rod 5 into radial rotation to perform the screwing and unscrewing of the valve core. Its helix angle and stroke length are set according to the tooth profile parameters of the target threaded part 16 and the number of turns required to screw out.

[0030] An adaptive tracking gripping mechanism is located at the front end of the stepped piston rod 5, including a gripping head 13 and an elastic connector 14, specifically an axial floating spring. The gripping head 13 is connected to the stepped piston rod 5 via the elastic connector 14, and the biting end face of the gripping head 13 is provided with a guide slope (in this embodiment, a V-shaped guide slope 15). The gripping head 13 is preferably a V-shaped tracking gripping head, and its V-shaped guide slope 15 is used to guide the gripping head to automatically align with the crossbeam of the target threaded part 16 during gripping.

[0031] The following section, using the complete process of the first stage, "passive tracking and wire unloading," explains the specific operating mechanism of the adaptive tracking clamping mechanism: The operator opens the air valve, and compressed air enters the rodless chamber 3 of the actuator cylinder 2, propelling the stepped piston rod 5 forward. Because the guide 11 is currently located at the straight inlet section at the front end of the segmented guide groove 12, the stepped piston rod 5 is constrained to perform only pure axial translation.

[0032] This system features an axial safety clearance in its spatial layout. As the stepped piston rod 5 continues to move forward, the guide 11 smoothly transitions through the B-spline into the helical working section, and the stepped piston rod 5 begins to rotate in a forced forward direction. Before the clamping head 13 contacts the target threaded part 16 (valve core), the stepped piston rod 5 pre-rotates approximately 2 to 3 revolutions along the helical working section in a low-resistance, interference-free clearance state. This clearance pre-rotation action covers the full effective helical stroke in advance, providing ample retraction margin for subsequent reverse release.

[0033] After completing the reserved travel distance, the gripping head 13, in a forward rotating and advancing state, contacts the crossbeam of the stationary target threaded part 16. At this moment, the adaptive tracking gripping mechanism performs its dynamic flexible alignment function: the elastic connecting member 14 (floating spring) is rapidly compressed, effectively absorbing the rigid impact kinetic energy at the moment of rotational contact; simultaneously, the V-shaped guide ramp 15 on the biting end face of the gripping head 13 guides the fork to smoothly align with the crossbeam during rotation. Driven by the potential energy released by the elastic connecting member 14, the gripping head 13 cuts into the groove of the crossbeam, achieving dynamic tracking engagement.

[0034] Once a reliable engagement is achieved, the clamping head 13 is immediately stopped due to the extremely high static friction caused by the locked target threaded part 16. The positive thrust of the actuator cylinder is completely offset by the reaction force at the engagement point, and the actuator cylinder 2 stops working and instantly enters a pneumatic stall state.

[0035] After the pneumatic stall of the cylinder is executed, the air pressure in the rodless chamber 3 no longer performs work conversion and continues to rise. This pressure increase serves as a signal to trigger the subsequent air path switching, driving the stepped piston rod 5 to switch from forward rotation to reverse rotation. Since the guide member 11 has already stored a helical stroke of no less than the required unscrewing stroke during the idle pre-rotation stage, the helical groove remains effectively engaged during the reverse rotation stage. The stepped piston rod 5 can continuously rotate in the opposite direction for the full number of turns, smoothly and completely unscrewing the target threaded part 16 from the fully engaged state, and finally retracting it together with the clamping head 13 and receiving it in the bypass side chamber 17. Throughout the entire process, there will be no bottoming out or dislodging due to insufficient helical stroke.

[0036] The bypass side cavity 17 is located inside the quick-connect inflation head 1 and is an independent storage space specifically designed to allow the pneumatic composite actuator (including the actuator cylinder 2, stepped piston rod 5, and front clamping component) to retract and avoid obstruction. The bypass side cavity 17 serves only as a physical avoidance blind spot, used for the safe recovery and proper storage of the completely unscrewed target threaded part 16 and clamping head 13, preventing them from remaining in place and obstructing the inflation airflow. The bypass side cavity 17 itself does not have an inflation guiding function and is spatially independent from the high-pressure air channel responsible for inflation. This design, which separates the storage from the inflation air channel, ensures that the clamping mechanism will not bottom out or disengage due to stroke limitations throughout the entire process, and also ensures that subsequent high-flow inflation is not interfered with by mechanical components.

[0037] The specific structure of the air pressure feedback control loop and the back pressure switching inflation process; like Figure 2As shown, the pneumatic feedback control loop is integrated into the main control valve assembly. The specific connection relationships of the main control valve assembly and related pipelines are as follows: the air source 25 serves as the unified power source of the system, and its main air path branches are respectively connected to the air inlet of the pneumatic directional valve 19, the pressure regulating valve 20 (specifically a precision pressure reducing valve), and the pneumatic sequence valve 21. The two working air outlets of the pneumatic directional valve 19 are respectively connected to the rodless chamber 3 of the actuator cylinder 2, and connected to the rod chamber 4 through the pressure regulating valve 20.

[0038] A dead-point back pressure signal line 24 is led out from the air supply line of the rodless chamber 3 and connected to the pilot control end of the pneumatic reversing valve 19. It is configured to trigger the pneumatic reversing valve 19 to achieve automatic reversing of the actuator cylinder when the gripper head rotates forward and engages and pneumatic stall occurs (sudden increase in pressure in the rodless chamber) in the first stage. A rod chamber back pressure signal line 23 is led out from the line of the rod chamber 4 and connected to the pilot trigger end of the pneumatic sequence valve 21. The air outlet of the pneumatic sequence valve 21 is connected to the direct charging air passage 22. The direct charging air passage 22 is independent of the bypass side chamber 17 of the actuator and directly leads to the valve inner cavity where the target threaded part 16 is located.

[0039] The specific process of the second stage, "back pressure switching inflation," is as follows: When the target threaded part 16 is fully unscrewed, and the stepped piston rod 5 retracts to the mechanical dead point at the tail end of the actuator cylinder under the air intake drive of the rod chamber 4, the volume of the actuator cylinder stops expanding, and the pressure in the rod chamber 4 rises sharply. This back pressure is guided to the main control valve group through the rod chamber back pressure signal line 23, triggering and opening the pneumatic sequence valve 21, which is set with an opening pressure. The main air supply line is then switched, and the high-pressure airflow enters the independent large-diameter straight-through inflation airflow channel 22 through the pneumatic sequence valve 21. The inflation airflow completely bypasses the valve core and clamping mechanism that have been recovered and stored in the bypass side chamber 17, and is injected into the tire interior in a high-flow straight-through jet manner, effectively eliminating fluid blockage.

[0040] The specific process of the third stage, "constant torque reinstallation," is as follows: Once the tire reaches the predetermined pressure, the operator switches the reloading valve. Compressed air enters the rod chamber 4 of the actuator cylinder 2, driving the stepped piston rod 5 to rotate forward along the spiral groove, screwing the target threaded part 16 into the valve stem. At this time, the pressure regulating valve 20, connected in series in the reloading air supply path, comes into play.

[0041] The output air pressure threshold of the pressure regulating valve 20 is calibrated to the cylinder thrust balance value corresponding to the safety locking torque of the target threaded part 16. As the target threaded part 16 is gradually tightened, the thread friction resistance torque increases, which is converted into an axial counter-thrust force to resist the forward movement of the actuator cylinder. This invention utilizes the static balance principle of fluid compressibility, where the axial positive thrust provided by the pressure regulating valve 20 and the friction resistance torque generated when the target threaded part is screwed in are converted into an axial counter-thrust force and balanced in real time. When the locking torque reaches the target range of approximately 0.34-0.57 Nm, the resistance counter-thrust force and the air pressure positive thrust tend to cancel each other out, and the actuator cylinder 2 smoothly enters the pneumatic stall state, stops working, and achieves passive overload protection, effectively preventing thread overload, stripping, or breakage.

[0042] Upon reassembly, at the instant the air source is shut off and pressure is released, the compressed elastic connector 14 returns to its original length before the actuating cylinder 2. Utilizing the time difference, it releases displacement, pushing the clamping head 13 forward relative to the stepped piston rod 5, disengaging from the groove of the target threaded part 16 along the axial direction constrained by the straight guide section. Subsequently, the reverse rotation generated by the stepped piston rod 5 retracting along the helical working section of the segmented guide groove 12 is in a "suspended" state, meaning that this reverse rotation no longer exerts any torsional effect on the target threaded part 16 through the clamping head 13. This effectively reduces the impact of the reverse loosening effect on the locking torque, maintains the already achieved locking torque, and prevents slow leakage.

[0043] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. An adaptive segmented pneumatically driven thread disassembly, assembly, and inflation system based on pneumatic pressure sequential control, characterized in that, include: A pneumatic composite actuator is installed inside a quick-connect air inlet (1) and includes an actuator cylinder (2) and a stepped piston rod (5). The stepped piston rod (5) includes a light axis sealing section (6) and a slotted guide section (7). The front cover (8) of the actuator cylinder (2) is provided with a sealing element (9) that slides and seals with the light axis sealing section (6). A guide sleeve (10) that communicates with the atmosphere is fixedly connected to the outside of the front cover (8). The guide sleeve (10) is nested outside the slotted guide section (7) and its inner wall is provided with a guide element (11). The guide element (11) is fitted into the segmented guide groove (12) on the outer circumference of the slotted guide section (7). An adaptive tracking clamping mechanism is located at the front end of the stepped piston rod (5), including a clamping head (13) and an elastic connector (14); the clamping head (13) is connected to the stepped piston rod (5) through the elastic connector (14), and the biting end face of the clamping head (13) is provided with a guide slope; it is configured to automatically track the target threaded part (16) by storing energy through the elastic connector (14) when the target threaded part (16) is grabbed and interfered with, and to release the displacement compensation generated by the elastic connector (14) when the device is pulled out, so that the clamping head (13) can disengage before the stepped piston rod (5) reverses its movement; The pneumatic feedback control loop is integrated into the main control valve group, including a pressure regulating valve (20) connected in series on the refill air supply path, configured to achieve constant torque locking by using the pneumatic stall principle; it also includes a pneumatic sequence valve (21) triggered by the back pressure of the rod chamber (4) of the actuating cylinder (2), configured to achieve automatic switching of direct-flow inflation.

2. The adaptive segmented pneumatic thread disassembly and inflation system based on pneumatic pressure sequential control according to claim 1, characterized in that: The segmented guide groove (12) includes a straight guide section at the front end and a spiral working section at the rear end; the straight guide section is configured to constrain the stepped piston rod (5) to perform only axial displacement without radial rotation during the stroke phase when the gripper head (13) grips or disengages from the target threaded part (16).

3. The adaptive segmented pneumatic thread disassembly and inflation system based on pneumatic pressure sequential control according to claim 2, characterized in that: The linear inlet section and the spiral working section of the segmented guide groove (12) are connected by a B-spline smooth transition curve.

4. The adaptive segmented pneumatic thread disassembly and inflation system based on pneumatic pressure sequential control according to claim 1, characterized in that: The actuator cylinder (2) includes a rodless chamber (3) and a rod chamber (4). The pneumatic feedback control circuit is configured such that when the clamping head (13) engages with the target threaded part (16), the actuator cylinder (2) enters a pneumatic stall state, the air pressure in the rodless chamber (3) increases and triggers the pneumatic reversing valve (19) to automatically switch the air path to achieve the forward and reverse switching of the stepped piston rod (5).

5. The adaptive segmented pneumatic thread disassembly and inflation system based on pneumatic pressure sequential control according to claim 4, characterized in that: The trigger signal end of the pneumatic sequence valve (21) is connected to the rod chamber (4) pipeline of the actuator cylinder (2); it is configured to automatically open the direct charging channel (22) to the outlet end of the quick-connect charging head (1) when the stepped piston rod (5) retracts to the mechanical dead point and the back pressure increases.

6. The adaptive segmented pneumatic thread disassembly and inflation system based on pneumatic pressure sequential control according to claim 1, characterized in that: The output air pressure threshold of the pressure regulating valve (20) is calibrated to the cylinder thrust balance value corresponding to the safety locking torque of the target threaded part (16), so that the actuating cylinder (2) enters the pneumatic stall state when the turning resistance reaches the standard.

7. The adaptive segmented pneumatic thread disassembly and inflation system based on pneumatic pressure sequential control according to claim 1, characterized in that: The gripping head (13) is elastically connected to the stepped piston rod (5) via an elastic connector (14). It is configured to automatically track the object by storing energy through elastic compression when a collision occurs during gripping. At the moment the air source is cut off at the end of the operation, the elastic connector (14) recovers before the stepped piston rod (5), releases displacement by utilizing the time difference, pushes the gripping head (13) forward and causes it to disengage from the target threaded part (16) in a straight line.

8. The adaptive segmented pneumatic thread disassembly and inflation system based on pneumatic pressure sequential control according to claim 1, characterized in that: The optical axis sealing section (6) is an optical axis section, the slotted guide section (7) is a slotted guide section; the sealing element (9) is a dynamic sealing ring, and the guide element (11) is a guide pin.

9. The adaptive segmented pneumatic thread disassembly and inflation system based on pneumatic pressure sequential control according to claim 1, characterized in that: The clamping head (13) is a V-shaped tracking clamping head, and its biting end face is provided with a V-shaped guide slope (15).

10. The adaptive segmented pneumatic thread disassembly and inflation system based on pneumatic pressure sequential control according to claim 1, characterized in that: The system is a purely pneumatic control system and contains no electronic components.

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