Rigid guide rail self-locking device

Abstract

The invention relates to the technical field of self-locking devices, and discloses a rigid guide rail self-locking device which comprises a descending self-locking device and a guide rail, the descending self-locking device is connected to the guide rail in a sliding mode, and a first lock catch of the descending self-locking device is connected with a buffering protection device in a buckled mode. The buffering protection device is divided into a first buffering assembly, a second buffering assembly and a third buffering assembly which are fixedly connected in sequence from top to bottom, the third buffering assembly is connected with a second lock catch in a buckled mode, the second buffering device is provided with three layers of buffering air bags, and the third buffering device is provided with three layers of buffering air bags. The first buffering assembly, the second buffering assembly and the third buffering assembly are arranged in parallel, each buffering air bag is fixedly connected through a first tearing belt, a plurality of buffering springs are fixedly arranged between the buffering air bags, and a descending induction inflation device is arranged in each buffering air bag. The impact force is always in a safe and controllable range, and the protection effect is enhanced in all directions.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of self-lockers, and in particular to a rigid guide rail self-locker. BACKGROUND

[0002] In high-altitude work scenes such as construction, power, wind power and bridges, workers need to climb, move or hover along the rigid guide rail. The performance of the rigid guide rail self-locker as the core anti-falling device directly determines the safety of the workers.

[0003] The existing rigid guide rail self-locker is usually composed of a descending self-locking device and a guide rail. The descending self-locking device is slidingly connected to the guide rail through a roller mechanism. When the worker accidentally falls, the descending self-locking device can achieve emergency locking through a braking mechanism to cut off the falling trend.

[0004] However, as the height of high-altitude work increases, such as the height of a wind power tower reaching 80-120m and the body size difference of workers increasing, with a weight span of 50-120kg, the existing rigid guide rail self-locker gradually exposes many technical defects in the buffer protection device, which is difficult to meet the safety protection needs in complex scenes. The existing guide rail self-locker has a single buffer level and insufficient impact force absorption. The buffer protection of the existing self-locker adopts a single buffer bag and a tearable single-ring buffer bag, which can only absorb impact force through single material tearing. When facing different weight personnel falling (such as 50kg light personnel and 120kg heavy personnel) or different falling speeds (such as slow climbing falling and fast sliding falling), the single buffer structure cannot achieve graded energy absorption. Lightly, it may cause the light personnel to be injured due to insufficient buffering, and heavily, it may increase the risk of falling distance for heavy personnel due to excessive buffering. Moreover, it is difficult to stably control the impact force within the safety threshold of ≤6kN specified in GB 24542-2023. SUMMARY

[0005] In order to improve the problem of single buffer level and insufficient impact force absorption of the existing guide rail self-locker, the application provides a rigid guide rail self-locker.

[0006] The rigid guide rail self-locker provided by the application adopts the following technical scheme: A rigid guide rail self-locking device includes a descent self-locking device and a guide rail. The descent self-locking device is slidably connected to the guide rail. A first latch of the descent self-locking device is engaged with a buffer protection device. The buffer protection device is divided into a first buffer component, a second buffer component, and a third buffer component. The first buffer component, the second buffer component, and the third buffer component are fixedly connected from top to bottom. The third buffer component is engaged with a second latch. The second buffer device has three layers of buffer airbags. Each buffer airbag is connected and fixed by a first tear strip. Several buffer springs are fixedly installed between each buffer airbag. A descent-sensing inflation device is provided inside each buffer airbag.

[0007] By adopting the above technical solution, in this rigid guide rail self-locking device, the first, second, and third buffer components are fixed sequentially from top to bottom to form a graded buffering system, which can gradually absorb the impact force of falling and avoid insufficient single-time buffering. The three-layer buffer airbags of the second buffer component can provide multi-layer energy absorption and enhance the buffering effect. The first tear strip can fix adjacent buffer airbags to prevent airbag misalignment from affecting the buffering performance and enhance the connection brightness of the airbags. The buffer spring and the buffer airbag work together to enhance the buffering force and prevent excessive deformation of the airbags. The descent sensing inflation device can inflate the airbags in time during the fall to ensure that the airbags quickly enter the working state, ensuring the timeliness and reliability of the buffer protection, and improving the overall safety protection performance of the self-locking device to meet the needs of different high-altitude operation scenarios.

[0008] Optionally, the buffer airbag has an air tank and several unit air distribution chambers. The air tank is coaxially fixed at the center of several fan-shaped airbag units, and several fan-shaped units surround the air tank. The air tank has several air guide pipes that are respectively connected to several unit air distribution chambers.

[0009] By adopting the above technical solution, the air tank of the cushioning airbag is coordinated with the unit air distribution chamber. The air tank is coaxially fixed at the center of the fan-shaped airbag unit, which can realize centralized air supply without occupying extra space and avoid interference with the guide rail or other components of the self-locking device. The air tank is connected to the unit air distribution chamber through several air guide pipes, which can ensure that each fan-shaped unit is inflated synchronously, improve the stability and consistency of the airbag cushioning, and further ensure the protective effect during high-altitude falls.

[0010] Optionally, the gas storage tank is equipped with the descent-sensing inflation device, which includes a tank body and an inflation chamber. The inflation port of the tank body is connected to several air guide pipes. The top of the inflation chamber is provided with a cylindrical groove, and a trigger valve is provided in the groove. After the trigger valve senses a rapid descent, the inflation chamber is inflated through the air guide pipes via the inflation port.

[0011] By adopting the above technical solution, the trigger valve can sense the rapid descent action and open in time when the fall occurs, so that the inflation chamber can inflate the airbag through the air pipe, ensuring that the airbag expands in a short time and plays a buffering role, avoiding buffer failure due to untimely inflation, improving the timeliness and reliability of buffer protection, and enhancing the safety guarantee capability of rigid guide rail self-locking device in high-altitude operations.

[0012] Optionally, the trigger valve is equipped with an inertia valve core and a return spring inside. The top of the return spring is fixed to the inertia valve core, and the other end is set at the upper end of the cylindrical groove. When the inertia valve core is not triggered, it closes the air inlet. When triggered, it quickly descends and opens the air inlet.

[0013] By adopting the above technical solution, the inertial valve core inside the trigger valve cooperates with the return spring. In the untriggered state, the return spring can press against the inertial valve core to close the inflation port, prevent gas leakage, and ensure stable gas pressure in the gas tank. When a rapid drop occurs, the inertial valve core can overcome the force of the return spring to open the inflation port, ensuring that gas can smoothly enter the airbag and realize timely inflation of the airbag. The return spring can also drive the inertial valve core to reset after triggering, which is convenient for subsequent reuse and avoids failure of the trigger mechanism after a single use, further ensuring the continuous protective capability of the buffer airbag.

[0014] Optionally, a through hole is provided in the middle of the groove, and a telescopic rod is connected to the lower end of the inertial valve core. The telescopic rod passes through the through hole and is screwed to the lower end threaded sleeve. The threaded sleeve is connected to the micro motor through a rotating connector, and the micro motor is connected to the micro battery.

[0015] By adopting the above technical solution, the threaded sleeve and the micro motor are connected by a rotating connector. The micro motor can drive the threaded sleeve to rotate, thereby driving the telescopic rod to move, thus avoiding the situation where the valve core is stuck due to inertia and cannot move down.

[0016] Optionally, the first buffer assembly is a miniature hydraulic buffer. One end of the miniature hydraulic buffer is fixed to the metal connector of the buffer airbag, and the other end is detachably connected to the connecting lug of the universal joint. The miniature hydraulic buffer is equipped with an overload protection valve. When the impact force of the fall exceeds 6kN, the protection valve automatically opens to release pressure and triggers the internal spring at the same time. The top of the valve stem has anti-slip texture and is marked with three gear scales.

[0017] By adopting the above technical solution, the hydraulic buffer can effectively absorb the impact force of falling objects and form a multi-stage buffer in conjunction with subsequent buffer components, thereby improving the overall buffering effect. The internal overload protection valve automatically opens to release pressure when the impact force exceeds the threshold, preventing the hydraulic buffer from being damaged due to overload. At the same time, it triggers the internal spring for secondary buffering, further enhancing the buffering protection. The anti-slip texture at the top of the valve stem facilitates operator adjustment, and the three-position scale can adapt to the buffering needs of different operating scenarios, improving the ease of operation and scenario adaptability of the device.

[0018] Optionally, the third buffer component is a buffer bag, in which a second tear strip is placed. One end of the second tear strip is fixed to the connecting ear at the bottom of the buffer airbag, and the other end is fixed to the connecting ear of the second buckle.

[0019] By adopting the above technical solution, the third buffer component is set as a buffer pack, which can form a three-level buffer with the first and second buffer components, further absorbing the impact force that the preceding buffer components have not completely consumed, improving the overall buffer level. The overall structure can work together with the preceding buffer components to further reduce the impact force transmitted to the human body and enhance the safety protection performance of the rigid guide rail self-locking device.

[0020] Optionally, the three cushioning airbags are housed inside an airbag pack, and the opening of the airbag pack is secured with Velcro.

[0021] By adopting the above technical solution, the three buffer airbags are housed in the airbag pack, which can effectively protect the airbags and extend their service life. The opening of the airbag pack is fastened with Velcro, so the airbag pack can be quickly opened when the airbag is inflated without manual operation. It can also be tightly closed when not in use to prevent the airbag from shaking and interfering with the guide rail or other components of the self-locking device.

[0022] Optionally, the descent self-locking device is equipped with a control box, which contains an acceleration sensor, a control chip with a signal transmitter, and a small battery. The acceleration sensor is electrically connected to the control chip. The inflation chamber contains a signal receiver, which is electrically connected to the control chip. The signal transmitter and the signal receiver are matched and connected to each other.

[0023] By adopting the above technical solution, the acceleration sensor can accurately detect whether a fall has occurred, providing an accurate signal to trigger inflation. The control chip with a signal transmitter is electrically connected to the acceleration sensor, which can quickly process the sensor signal and transmit it to the airbag's signal receiver through the transmitter, thereby enabling the airbag to open and rotate the motor, preventing the inertial valve core from being stuck and the inflation port from not opening.

[0024] Optionally, the cushioning airbag material is polyether polyurethane with an elongation at break of ≥500%, and the outer side is marked with unit quantity scale lines.

[0025] By adopting the above technical solution, the airbag is made of polyether polyurethane material, which has excellent elasticity and toughness. It can fully deform and absorb energy during the fall cushioning process and is not easy to undergo permanent deformation. The unit quantity scale marked on the outside makes it easy for operators to quickly confirm whether the number of airbag units is suitable according to the actual operation needs and personnel situation.

[0026] In summary, this application includes at least one of the following beneficial technical effects of rigid guide rail self-locking devices: 1. A three-stage buffer structure consisting of a first buffer component, a second buffer component, and a third buffer component is adopted. The hydraulic buffer, together with the airbag and buffer pack, gradually absorbs the impact force of the fall. The overload protection valve built into the hydraulic buffer and the airbag buffer spring not only avoid impact injuries caused by insufficient buffering in a single incident, but also prevent overload damage to the equipment, ensuring that the impact force is always within a safe and controllable range. At the same time, the second tear strip assists in energy absorption through controlled tearing, further reducing the impact force transmitted to the human body, thus comprehensively enhancing the protective effect.

[0027] 2. The inertial valve core of the trigger valve can quickly sense the fall and start inflation. With the precise detection of the acceleration sensor in the control box and the real-time signal transmission of the control chip, inflation delay caused by the inertial valve core jamming can be avoided. The air tank and the unit air distribution chamber are supplied with air synchronously through the air guide pipe to ensure that the airbag expands evenly in a short time, completely solving the problem of delayed or uneven inflation of traditional airbags and ensuring timely cushioning. Attached Figure Description

[0028] Figure 1 This is a three-dimensional structural diagram of the self-locking descent device in this application in conjunction with the guide rail; Figure 2 This is a plan view of the inflatable airbag of the present invention when it is not inflated; Figure 3 This is a planar structural diagram of the inflatable airbag of the present invention. Figure 4 for Figure 3 Enlarged view of section A; Figure 5 This is a three-dimensional structural diagram of the three-layer buffer airbag and hydraulic buffer of the present invention; Figure 6 This is a cross-sectional view of the airbag in this invention; Figure 7 for Figure 6 Enlarged view of section B; Figure 8 This is a three-dimensional structural diagram of the buffer airbag in this invention.

[0029] Reference numerals: 1. Guide rail; 2. Lowering self-locking device; 20. First latch; 21. Control box; 3. First buffer assembly; 30. Miniature hydraulic buffer; 4. Second buffer assembly; 40. Buffer airbag; 400. Tank; 4000. Inflation port; 401. Connecting cloth; 402. Inertia valve core; 403. Return spring; 404. Telescopic rod; 405. Threaded sleeve; 406. Miniature battery; 407. Miniature motor; 408. Signal receiver; 409. Air duct; 41. Buffer spring; 42. First tear strip; 43. Unit air distribution chamber; 5. Third buffer assembly; 50. Buffer bag. Detailed Implementation

[0030] The following is in conjunction with the appendix Figures 1-7 This application will be described in further detail.

[0031] This embodiment discloses a rigid guide rail self-locking device. The rigid guide rail 1 self-locking device includes three major modules: a descent self-locking device 2, a rigid guide rail 1, and a buffer protection device. The three modules work together to achieve the full-process anti-fall function of sliding, locking, and buffering, and are suitable for high-altitude operation scenarios such as construction, wind power, and bridges.

[0032] Reference Figures 1-2 As shown, the rigid guide rail 1 is made of 304 stainless steel, with locking grooves spaced 100mm apart on its outer side for locking by the descent self-locking device 2. The descent self-locking device 2 is slidably sleeved on the outer side of the guide rail 1 and is the core of the locking trigger. The buffer protection device is detachably connected to the bottom of the descent self-locking device 2 via a buckle to achieve the effect of energy absorption. It adopts a three-stage buffer design to gradually absorb the impact force of the fall, ultimately controlling the impact force transmitted to the human body within a safe range.

[0033] The connection between the three is as follows: the descent self-locking device 2 slides with the guide rail 1 through the roller mechanism, the first buckle 20 at the top of the buffer protection device is fastened to the bottom of the descent self-locking device 2, and the second buckle at the bottom of the buffer protection device is connected to the safety belt attachment point of the operator, forming a complete force transmission chain of "guide rail 1-descent self-locking device 2-buffer protection device-human body".

[0034] Reference Figures 1-2 As shown, the descent self-locking device 2 comprises four main components: the self-locking body, the roller mechanism, the braking mechanism, and the control box 21. All components are integrated into the same aluminum alloy base, and their structure and connection relationship are as follows: The inner side of the self-locking device body is attached to the outer wall of the guide rail 1 with a gap of ≤2mm. Two mounting bases are symmetrically welded to the first end of the body for mounting the roller mechanism. A U-shaped mounting groove for the braking mechanism is opened in the middle, with a depth of 20mm and a width of 30mm, to accommodate the braking mechanism. The control box 21 is fixed to the outside by 4 M5 bolts to ensure a stable connection.

[0035] The combination of the self-locking device and the guide rail 1, as well as the internal structure of the self-locking device, are existing technologies and will not be elaborated upon further in this invention.

[0036] The control box 21 is made of ABS engineering plastic injection molding and integrates "detection-control-power supply" components.

[0037] Component configuration: MMA7361 triaxial accelerometer, detection range ±2g, accuracy ±0.1g; STM32F103 microcontroller chip with Bluetooth 4.0 signal transmitter; 14500 lithium battery, capacity 1200mAh, output voltage 3.7V; Connection: The accelerometer is electrically connected to the I / O port of the control chip via DuPont wires to transmit acceleration signals. The lithium battery powers the sensor and chip through a voltage regulator module. The signal transmitter of the control chip is paired with the signal receiver 408 of the buffer protection device via Bluetooth. The transmission distance is ≥5m and the delay is ≤0.03s. The control box 21 is fixed to the self-locking device body with bolts. The sensor detection end faces the sliding direction of the guide rail 1 to ensure accurate signal acquisition.

[0038] Reference Figures 3-5 As shown, the buffer protection device adopts a "three-level buffer" design, including a first buffer component 3 (miniature hydraulic buffer 30), a second buffer component 4 (three-layer buffer airbag 40), and a third buffer component 5 (buffer pack 50). The components are connected in series through a detachable structure, and their construction and connection relationship are as follows: First buffer assembly 3: Miniature hydraulic buffer 30 (refer to...) Figures 3-5 (As shown) Selection and Construction: The QJ-10 type miniature hydraulic buffer 30 is selected, with a stroke of 20mm, rated impact force of 5kN, outer diameter of 25mm, length of 60mm, internal hydraulic oil filling, model ISOVG32, and an overload protection valve on the side wall with an opening pressure of 6kN. The valve stem is made of brass, and the top of the valve stem is machined with knurled anti-slip texture and marked with three speed settings: "1 (slow), 2 (normal), 3 (fast)" (corresponding to a fall speed of 0.5-1m / s, 1-1.5m / s, and 1.5-2m / s). Connection relationship: The upper end of the buffer is fixed to the lower end ear plate of the first locking buckle 20 by bolts, and the lower end is detachably connected to the upper end ear plate of the universal joint by a pin. Both ends of the pin are connected by cotter pins of model GB / T91 to prevent detachment, ensuring that the connection load is ≥15kN.

[0039] Second buffer component 4: The three-layer buffer airbag 40 is a central air storage unit that works in conjunction with the outer airbag structure. It includes three fan-shaped airbag units, each fan-shaped airbag unit equipped with an air storage tank, a descent-sensing inflation device, and an airbag pack (see reference). Figures 4-5 (As shown) Fan-shaped airbag unit: The material is polyether polyurethane, 2mm thick, with an elongation at break of 550% and a weather resistance temperature of -20℃ to 60℃. Each unit is fan-shaped with an included angle of 72°, and has a radius of 40mm and a thickness of 30mm when unfolded. The outer side is laser-engraved with unit number scale lines of 3 / 4 / 5 units. The three layers of airbags are stacked coaxially. Adjacent airbags are bonded and fixed by three first tear strips 42, 10mm wide and with a tensile strength of 5kN, to prevent airbag misalignment. Each layer of airbag has three buffer springs 41 (65Mn steel, 3mm diameter, 20mm free length, and 10N / mm stiffness) on the inner side. Hollow connecting fabric pieces 401 are provided at both the top and bottom ends of the airbag. Metal connecting plates are provided in the cavities of the connecting fabric pieces 401. The two ends of the springs are welded to the metal connecting plates. The connecting fabric pieces 401 are sewn and fixed to the airbag to resist excessive deformation of the airbag.

[0040] The gas storage tank is made of aerospace-grade aluminum alloy (model 6061, outer diameter 25mm, length 60mm, wall thickness 3mm), with a pressure resistance of ≥10MPa. It is filled with CO2 gas (purity 99.9%, initial pressure 8MPa). Five gas outlets are evenly distributed around the tank body. Each gas outlet is sealed to the corresponding fan-shaped gas chamber 43 of the unit gas distribution chamber through a high-pressure PU gas guide pipe 409, ensuring that the gas can be delivered to each gas distribution chamber synchronously, with an inflation time difference of ≤0.05s.

[0041] Descent-sensing inflation device (see reference) Figure 7 (As shown): Includes tank 400, inflation chamber, trigger valve, inertia valve core 402, return spring 403, and micro motor 407; Trigger valve: Installed at the gas filling port 4000 of the gas storage tank, it is equipped with an inertial valve core 402 and a return spring 403 inside; Inertia valve core 402 (reference) Figure 7 (As shown): made of tungsten alloy, placed inside the valve core channel, with a 404 telescopic rod welded to the lower end; Return spring 403 (reference) Figure 7 (As shown): 65Mn steel, sleeved on the outside of the telescopic rod 404, one end abuts against the lower end of the inertia valve core 402, and the other end abuts against the bottom of the cylindrical groove at the top of the inflation chamber. In the natural state, the spring presses against the valve core to close the inflation port 4000 of the gas storage tank. Miniature Motor 407 (Reference) Figure 7 As shown): RS-380 DC motor (speed 1000rpm, torque 0.5N・m) is connected to threaded sleeve 405 through universal joint. Threaded sleeve 405 is screwed to the lower end of telescopic rod 404. The motor is electrically connected to micro battery 406 (type 14500, capacity 800mAh, 3.7V) through wires. The battery is fixed in the battery compartment outside the inflation chamber. Airbag pack (see reference) Figure 2As shown): Made of nylon Oxford cloth, with Velcro sewn at the opening (20mm wide, adhesive force ≥5N). The three-layer airbag is folded and stored in the airbag bag. When inflated, the expansion force of the airbag can push open the Velcro (opening time ≤0.1s).

[0042] Third buffer component 5: Buffer pack 50 (refer to...) Figures 2-3 (As shown) Construction: Double-layer nylon webbing sewn together (outer layer material 1680D nylon, inner layer material 600D nylon), with 3 parallel second tear strips (polyester material, width 15mm, tensile strength 8kN) inside. Connection relationship: The two ends of the second tear strip are respectively bonded to the airbag ear plate and the second locking ear plate. The tear strip has no tension in its natural state and can be torn in a controlled manner when falling.

[0043] Working process and principle The working process of this rigid guide rail 1 self-locking device revolves around "normal operation - fall detection - emergency locking - multi-stage buffering - device reset". Each link achieves safety protection through structural coordination, as detailed below: (a) Normal operating state: standby and sliding Device status: The operator wears a safety belt, the second buckle is fastened to the belt hook point, the roller mechanism of the lowering self-locking device 2 is in contact with the outer wall of the guide rail 1, the brake rod is under the action of the compression spring, the locking head is lightly in contact with the guide rail 1 without locking force, and can slide freely along the guide rail 1; Buffer protection device status: The three-layer airbag is stored in the airbag pack, closed with Velcro, the air tank inflation port 4000 is sealed by the inertial valve core 402, the pressure is maintained at 8MPa, the micro hydraulic buffer 30 is adjusted to level 2 (normal) to adapt to normal climbing speed, the sensor in the control box 21 collects acceleration signals in real time (acceleration ≤0.5g during normal sliding), the control chip is in standby mode and does not send trigger commands.

[0044] (II) Fall Triggering and Locking: First Layer of Protection When a worker accidentally falls, the device enters the emergency locking phase, based on the principle of "sudden acceleration + spring-driven locking": Signal detection: As the descent self-locking device 2 moves rapidly downward with the human body, the acceleration suddenly increases to ≥1.5g. The acceleration sensor in the control box 21 captures the abnormal signal within 0.02s and converts the analog signal into a digital signal for transmission to the control chip. Emergency locking: At the same time, due to the weightlessness of the device, the brake lever loses the pressure of the human body's weight on the spring. The brake lever compresses the spring and releases elastic potential energy, pushing the brake lever to pivot rapidly around the fixed axis (rotation time ≤ 0.08s). The wedge-shaped locking head at the short arm end engages with the pre-set locking groove of the guide rail 1, realizing the rigid locking of the descent self-locking device 2 and the guide rail 1, cutting off the falling trend.

[0045] (III) Inflation and Airbag Deployment: Second Layer of Protection Even after locking, the human body will still briefly move downwards due to inertia, triggering the inflation and deployment of the buffer protection device. The principle is based on "inertia triggering + intelligent assistance": Inertial triggering: When the device moves down rapidly, the inertial valve core 402 of the descending induction inflation device overcomes the force of the reset spring 403 due to inertial force (inertial force ≥ 5N) and moves down along the valve core channel, opening the inflation port 4000 of the gas storage tank within 0.05s; Intelligent assistance: If the inertial valve core 402 is stuck due to low temperature or dust, the control chip in the control box 21 transmits a "trigger command" to the signal receiver 408 of the buffer protection device through the signal transmitter (transmission time ≤ 0.03s). The receiver triggers the micro motor 407 to start, the motor drives the threaded sleeve 405 to rotate, and drives the telescopic rod 404 to move down, so that the auxiliary valve core opens the inflation port 4000 to avoid the failure of inflation due to jamming; Airbag deployment: CO2 gas in the gas tank enters the gas distribution chamber of each sector-shaped airbag simultaneously through the gas guide tube 409. The three-layer airbag fully inflates within 0.2s. The expansion force pushes open the Velcro of the airbag bag to form an elastic buffer structure with a diameter of 80mm, ready to withstand the impact force.

[0046] (iv) Multi-level buffering and energy absorption: the third layer of protection The inflated airbag works in conjunction with various levels of cushioning components to absorb impact force, completing the process in three stages: First-stage buffer (hydraulic buffer): The impact force of the fall is first transmitted to the miniature hydraulic buffer 30. The hydraulic oil in the buffer flows slowly through the throttle orifice, generating damping force and absorbing 30% of the impact force (about 1.5kN). If the impact force exceeds 6kN, the overload protection valve automatically opens to release pressure, and at the same time the internal spring pops out, and performs secondary buffering through elastic deformation, absorbing an additional 15% of the impact force. Second-stage buffer (three-layer airbag): The remaining impact force is transmitted to the three-layer buffer airbag 40. The airbag is compressed from 30mm to 15mm through elastic deformation, absorbing 50% of the impact force. The buffer spring 41 resists the excessive compression of the airbag to prevent the airbag from rupturing. At the same time, the buffer spring 41 exerts an upward pulling force to further buffer the impact. The first tear strip 42 fixes adjacent airbags to prevent airbag misalignment from causing uneven buffering. At the same time, the tear strip can be used to resist part of the impact force. The third-level buffer (buffer pack): The final residual impact force is transmitted to the third buffer component 5. The second tear strip inside the buffer pack 50 absorbs all the residual impact force through controlled tearing (tear length ≤ 50 mm). The tearing process is smooth and there is no sudden increase in impact force. The final impact force transmitted to the human body is ≤ 1.5 kN, which is far below the human body's tolerance limit (≤ 6 kN).

[0047] In summary, this rigid guide rail self-locking device solves the problem of insufficient impact absorption and single buffering level in traditional devices by working in synergy of "locking-inflating-buffering", thus providing safe and reliable fall protection for workers at heights.

[0048] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "a" or "an," and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising," "including," and similar terms mean that the elements or objects preceding "comprising" encompass the elements or objects listed following "comprising" or "including," and their equivalents, but do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0049] The above description is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the design concept of this application should be included within the protection scope of this application.

Claims

1. A rigid guide rail (1) self-locking device, comprising a descending self-locking device (2) and a guide rail (1), the descending self-locking device (2) being slidingly connected on the guide rail (1), characterized in that: The first buckle (20) of the descending self-locking device (2) is buckled with a buffer protection device, the buffer protection device is divided into a first buffer assembly (3), a second buffer assembly (4) and a third buffer assembly (5), the first buffer assembly (3), the second buffer assembly (4) and the third buffer assembly (5) are sequentially fixedly connected from top to bottom, the third buffer assembly (5) is buckled with a second buckle, the second buffer device is provided with three layers of buffer air bags (40), each buffer air bag (40) is fixedly connected through a first tearing belt (42), a plurality of buffer springs (41) are fixedly arranged between each buffer air bag (40), and a descending sensing inflation device is arranged in the buffer air bag (40).

2. A rigid rail (1) lock according to claim 1, characterized in that: The buffer air bag (40) is provided with a gas storage tank and a plurality of unit gas chambers (43), the gas storage tank is coaxially fixed in the center of a plurality of fan-shaped air bag units, and a plurality of fan-shaped units surround the gas storage tank, and the gas storage tank is provided with a plurality of gas guide pipes (409) respectively connected with the plurality of unit gas chambers (43).

3. A rigid rail (1) lock according to claim 2, characterized in that: The descending sensing inflation device is arranged in the gas storage tank, and the descending sensing inflation device comprises a tank body (400) and an inflation cavity, a plurality of gas guide pipes (409) are connected with the inflation cavity of the tank body (400), a cylindrical groove is arranged at the top of the inflation cavity, a trigger valve is arranged at the groove, and the trigger valve senses rapid descending, and the inflation cavity inflates the gas guide pipes (409) through the inflation port (4000).

4. A rigid rail (1) lock according to claim 3, characterized in that: The trigger valve is internally provided with an inertial valve core (402) and a reset spring (403), the top of the reset spring (403) is fixed with the inertial valve core (402), and the other end is arranged on the upper end of the cylindrical groove, the inertial valve core (402) closes the inflation port (4000) when not triggered, and opens the inflation port (4000) when triggered.

5. A rigid rail (1) lock according to claim 4, characterized in that: A through hole is arranged in the middle of the groove, the lower end of the inertial valve core (402) is connected with a telescopic rod (404), the telescopic rod (404) penetrates through the through hole and is screwed with a lower end threaded sleeve (405), the threaded sleeve (405) is connected with a micro motor (407) through a rotating connecting piece, and the micro motor (407) is connected with a micro battery (406).

6. A rigid rail (1) lock according to claim 1, characterized in that: The first buffer assembly (3) adopts a micro hydraulic buffer (30), one end of the micro hydraulic buffer (30) is fixed with a metal connecting piece of the buffer air bag (40), and the other end is detachably connected with a connecting lug of a universal joint, the micro hydraulic buffer (30) is internally provided with an overload protection valve, when the falling impact force exceeds 6kN, the protection valve is automatically opened to release pressure, and an internal spring is triggered at the same time, the top end of the valve rod is provided with anti-skid lines, and three gear scales are marked.

7. A rigid rail (1) lock according to claim 1, characterized in that: The third buffer assembly (5) is a buffer bag (50), the second tearing belt is arranged in the buffer bag (50), one end of the second tearing belt is fixed with a connecting lug at the bottom of the buffer air bag (40), and the other end is fixed with a connecting lug of the second buckle.

8. A rigid rail (1) lock according to claim 1, characterized in that: The three buffer air bags (40) are accommodated in an air bag bag, and the air bag bag is attached through a magic tape at an opening.

9. A rigid rail (1) lock according to claim 5, characterized in that: The lowering self-locking device (2) is provided with a control box (21), the inside of the control box (21) is provided with an acceleration sensor, a control chip with a signal transmitter and a small battery, the acceleration sensor is electrically connected with the control chip, a signal receiver (408) is arranged in the inflation cavity, the acceleration sensor is electrically connected with the control chip, and the signal transmitter is matched with the signal receiver (408) to dock signals.

10. A rigid rail (1) lock according to claim 1, characterized in that: The buffer air bag (40) is made of polyether polyurethane, and the elongation at break is greater than or equal to 500%, and the outside is marked with unit quantity scale lines.

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