Air bag mechanism, pit hole anti-falling filling safety device and protective foundation pit

Abstract

The invention discloses an air bag mechanism, a pit hole anti-falling filling safety device and a protective foundation pit, and belongs to the technical field of pit hole safety anti-falling equipment. The air bag mechanism comprises a telescopic assembly and an air bag assembly. The telescopic assembly comprises a telescopic pipe capable of stretching out and drawing back in the axial direction and two end covers, the two end covers are fixedly connected to the two ends of the telescopic pipe, and a communication opening is formed in one end cover. A plurality of vertical through grooves are formed in the side wall of the telescopic pipe, each vertical through groove extends in the axial direction of the telescopic pipe and penetrates through the two end covers, and the vertical through grooves are circumferentially formed around the axis of the telescopic pipe; the air bag assembly comprises an air bag and an inflation and deflation piece, the inflation and deflation piece is installed on the communication port, the air bag is arranged in the telescopic pipe, the air bag is connected and communicated with the inflation and deflation piece, and the air bag is configured to expand outwards along the vertical through groove after being inflated and elastically abut against the groove wall of the vertical through groove. According to the air bag mechanism, the reinforcing rib effect is formed on the telescopic pipe through the air bag, a stable whole is formed, and the overall supporting capacity is greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pit safety anti-falling equipment, and particularly relates to an air bag mechanism, a pit anti-falling filling safety device and a protected foundation pit. BACKGROUND

[0002] With the increase of power grid infrastructure projects, it is necessary to excavate a telegraph pole, a guyed foundation pit on the sidewalk of a city, the roadside of a town and the roadside of a village. Such foundation pits have the safety risk of falling into pedestrians, small animals and vehicles. In the prior art, the solutions for the foundation pit anti-falling mainly include three types: covering the foundation pit with wood boards, branches and other materials to prevent falling by physical shielding; setting warning tapes, warning signs and other warning signs around the foundation pit to remind pedestrians to avoid; and building a simple fence to surround the foundation pit to divide the danger area. However, these methods cannot effectively prevent pedestrians, small animals and vehicles from falling into the pit. Therefore, the prior art discloses a filling method for filling various foundation pits by inflation. However, the existing filling equipment usually only sets a single air bag, and the supporting capacity is insufficient. SUMMARY

[0003] The present application provides an air bag mechanism, a pit anti-falling filling safety device and a protected foundation pit, and aims to solve the problem of insufficient supporting capacity in the prior art.

[0004] The first aspect of the present application provides an air bag mechanism, comprising:

[0005] A telescopic assembly, the telescopic assembly comprises an axially telescopic telescopic pipe and two end covers, the two end covers are fixedly connected to the two ends of the telescopic pipe, and one of the end covers is provided with a communication port; a plurality of vertical through grooves are arranged on the side wall of the telescopic pipe, each of the vertical through grooves is arranged along the axial direction of the telescopic pipe and penetrates the two end covers, and the plurality of vertical through grooves are circumferentially arranged around the axis of the telescopic pipe;

[0006] An air bag assembly, the air bag assembly comprises an air bag and a gas charging and discharging member, the gas charging and discharging member is installed on the communication port, the air bag is arranged in the telescopic pipe, the air bag is connected and conducted with the gas charging and discharging member, and the air bag is configured to be inflated and expanded outward along the vertical through groove and elastically abut against the groove wall of the vertical through groove.

[0007] In some embodiments of the first aspect, the vertical through grooves are uniformly circumferentially arranged around the axis of the telescopic pipe.

[0008] In some embodiments of the first aspect, the telescopic pipe is a telescopic square pipe, and the plurality of vertical through grooves are respectively located at the corners of the telescopic square pipe.

[0009] In some embodiments of the first aspect, the air bag mechanism further comprises at least two springs;

[0010] Two said springs are respectively located at both ends of said air bag, and each said spring is fixedly connected with said air bag and the nearest said end cover.

[0011] In some embodiments of the first aspect, a reinforcing frame is arranged on said end cover, and said reinforcing frame is located on the side of said end cover close to said air bag.

[0012] In some embodiments of the first aspect, said telescopic tube comprises a plurality of telescopic plates.

[0013] Two ends of each said telescopic plate are fixedly connected with two said end covers, and a plurality of said telescopic plates are arranged around the axis of said end cover to form said telescopic tube, and a gap is left between two adjacent said telescopic plates to form said vertical through slot.

[0014] In some embodiments of the first aspect, said telescopic plate comprises a bottom plate body, a plurality of intermediate plate bodies and a top plate body which are sequentially and slidably connected from bottom to top.

[0015] Said bottom plate body is fixedly connected with one said end cover, and the inner wall of said bottom plate body is provided with a bottom vertical sliding groove for the sliding of said intermediate plate bodies.

[0016] The inner wall of said intermediate plate body is provided with an intermediate vertical sliding groove for the sliding of said intermediate plate body or said top plate body, and the outer wall of each said intermediate plate body is provided with an intermediate sliding block.

[0017] Said top plate body is fixedly connected with another said end cover, and the outer wall of said top plate body is provided with a top sliding block.

[0018] Wherein:

[0019] The intermediate plate body closest to said bottom plate body is slidably arranged in said bottom vertical sliding groove through said intermediate sliding block.

[0020] Between two adjacent said intermediate plate bodies, the intermediate plate body close to said top plate body is slidably arranged in the intermediate vertical sliding groove of the intermediate plate body close to said bottom plate body through the intermediate sliding block thereof.

[0021] Said top plate body is slidably arranged in the intermediate vertical sliding groove of the intermediate plate body closest to said top plate body through said top sliding block.

[0022] In some embodiments of the first aspect, a connecting member is further arranged on the outer wall of said telescopic tube, and said connecting member is used for splicing and fixing with different said air bag mechanisms.

[0023] The second aspect of the present application provides a pit anti-falling filling safety device, comprising a plurality of air bag mechanisms of the first aspect, and a plurality of said air bag mechanisms are arranged around the same axis, and two adjacent said air bag mechanisms are fixedly connected with each other.

[0024] The third aspect of the present application provides a protective foundation pit, comprising:

[0025] a foundation pit body;

[0026] The pit hole anti-falling filling safety device of the second aspect is matched in shape with the foundation pit body, is filled in the foundation pit body, and the outer peripheral wall of the pit hole anti-falling filling safety device elastically abuts against the inner wall surface of the foundation pit body.

[0027] From the above technical solutions, the present application has the following advantages:

[0028] The embodiment provides a gas bag mechanism, a pit hole anti-falling filling safety device and a protective foundation pit, comprising a telescopic assembly and a gas bag assembly; the telescopic assembly is matched with the gas bag assembly, a plurality of vertical through grooves are arranged on the side wall of the telescopic pipe, and the gas bag can expand radially outward along the vertical through grooves and elastically abut against the groove wall of the vertical through grooves after being inflated. Such a structure enables the gas bag to be closely combined with the telescopic pipe after inflation and expansion, the gas bag forms a "reinforcing rib" effect on the telescopic pipe, forms a relatively stable whole, greatly enhances the support capacity of the whole, improves the bending stiffness and longitudinal stability of the gas bag mechanism, and compared with the single gas bag in the prior art, can effectively solve the problem of insufficient support capacity, better prevents pedestrians, small animals and vehicles from falling into the foundation pit, and ensures safety. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiment or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0030] Figure 1 A whole structure schematic diagram of a gas bag mechanism in an elongated state provided by the embodiment of the present application;

[0031] Figure 2 A whole structure schematic diagram of a gas bag mechanism in a contracted state provided by the embodiment of the present application;

[0032] Figure 3 A whole structure schematic diagram of a telescopic assembly provided by the embodiment of the present application;

[0033] Figure 4 A whole structure schematic diagram of a top plate body of a telescopic pipe provided by the embodiment of the present application;

[0034] Figure 5The overall structure schematic diagram of the middle plate body of the telescopic pipe provided by the embodiment of the present application is shown in the figure.

[0035] Figure 6 The overall structure schematic diagram of the bottom plate body of the telescopic pipe provided by the embodiment of the present application is shown in the figure.

[0036] Reference signs:

[0037] Telescopic assembly 1; telescopic pipe 10; vertical through slot 100; telescopic plate 101; bottom plate body 1010; bottom vertical sliding slot 10100; middle plate body 1011; middle vertical sliding slot 10110; middle sliding block 10111; top plate body 1012; top sliding block 10120; end cover 11; reinforcing frame 110;

[0038] Air bag assembly 2; air bag 20; gas charging and discharging member 21;

[0039] Spring 3. DETAILED DESCRIPTION

[0040] In order to make the application purpose, features and advantages of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the embodiments described below are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0041] The prior art solutions for foundation pit falling prevention mainly include three types: covering the foundation pit with wood boards, branches and other materials to prevent falling through physical shielding; setting warning tapes, warning signs and other warning signs around the foundation pit to remind pedestrians to avoid; building a simple fence to surround the foundation pit to divide the dangerous area; the shielding materials such as wood boards and branches are mostly rotten and dilapidated materials that cannot bear the weight of the human body or vehicle crushing, and are prone to collapse leading to falling accidents; the warning tapes and warning signs have low recognition at night when the lighting is insufficient, and have no effective warning effect on drunk pedestrians and small animals; the warning tapes are mostly disposable, and the wood boards and fences are easily damaged after disassembly, cannot be reused, and have high cost; the existing shielding materials have fixed size and cannot be flexibly adjusted according to different depths (such as more than 3 meters) and diameters (such as more than 60 centimeters) of the foundation pit; there is no real-time monitoring of key parameters such as air pressure and structural stability, and the shielding material failure problem cannot be found in time.

[0042] The embodiment of the present application provides an air bag mechanism, a pit falling prevention filling safety device and a protective foundation pit, which are used to solve the technical problem of insufficient supporting capacity of the prior art.

[0043] Please refer to Figures 1 to 3 The air bag mechanism provided by the present application comprises:

[0044] The telescopic assembly 1 comprises an axially telescopic telescopic pipe 10 and two end covers 11 fixedly connected to the two ends of the telescopic pipe 10, one of which is provided with a communication port; a plurality of vertical through grooves 100 are provided on the side wall of the telescopic pipe 10, each of which extends along the axial direction of the telescopic pipe 10 and penetrates the two end covers 11, and the plurality of vertical through grooves 100 are arranged circumferentially around the axis of the telescopic pipe 10;

[0045] The air bag assembly 2 comprises an air bag 20 and a gas charging and discharging member 21, the gas charging and discharging member 21 is installed on the communication port, the air bag 20 is arranged in the telescopic pipe 10, the air bag 20 is connected and communicated with the gas charging and discharging member 21, and the air bag 20 is configured to be radially outwardly expanded along the vertical through groove 100 after being inflated and to be elastically abutted against the groove wall of the vertical through groove 100.

[0046] In the working process of the embodiment, when it is necessary to protect the pit hole and the like, the air bag mechanism is first placed at a suitable position, the air bag 20 is inflated by the gas charging and discharging member 21, the air bag 20 starts to expand as the gas is filled, the outer wall of the air bag 20 abuts against the inner wall of the telescopic pipe 10 as the air bag 20 continues to expand, the air bag 20 further expands, the inflated air bag 20 expands radially outwardly along the plurality of vertical through grooves 100 on the side wall of the telescopic pipe 10 and is elastically abutted against the groove wall of the vertical through groove 100, and the air bag 20 continues to expand outwardly until the gap between the outer wall of the air bag mechanism and the inner wall of the pit hole is filled.

[0047] As can be known from the above working process, in the air bag mechanism of the embodiment, the air bag 20 expands radially outwardly along the plurality of vertical through grooves 100 on the side wall of the telescopic pipe 10 and is elastically abutted against the vertical through groove 100 after being inflated to a certain extent, the air bag 20 forms a "reinforcing rib" effect on the telescopic pipe 10, and the axial pressure bearing capacity, the bending stiffness and the longitudinal stability of the air bag mechanism are improved.

[0048] Compared with the traditional inflated air bag 20, the telescopic assembly 1 of the embodiment provides longitudinal stability and overall framework as an internal skeleton, prevents the device from being collapsed or overturned, and guides the expansion shape of the air bag 20, forming a "reinforcing rib" effect on the telescopic pipe 10; and the external air bag 20 ring provides radial adhesion and pressure diffusion, so as to abut against the foundation pit and make the soil receive a ring outward pressure, thereby ensuring the stability of the foundation pit structure, and the two work together to provide stability, elasticity and adaptability, the static load bearing capacity of the entire air bag mechanism is ≥200kg, the dynamic load bearing capacity can withstand motorcycle level rolling, the inflation time to the rated pressure is 3-5 minutes, and the stability, safety redundancy and load bearing capacity of the air bag mechanism are far superior to the traditional support of single material or single structure.

[0049] In a specific embodiment, as Figures 1 to 3As shown, in order to further improve the ability to withstand axial pressure, further provided is a vertically through slot 100 that can be matched with the telescopic pipe 10, which is uniformly circumferentially arranged around the axis of the telescopic pipe 10. In specific implementation, when the vertical through slot 100 of the air bag 20 expands outward, the plurality of "reinforcing ribs" of the air bag 20 extending part will be uniformly arranged outside the telescopic pipe 10.

[0050] It can be understood that the uniformly distributed "reinforcing frame 110" can also enhance the stability of the air bag mechanism in the radial direction. This uniform arrangement makes the force of each part of the air bag mechanism more balanced when it withstands axial pressure, effectively avoiding structural damage caused by local stress concentration. When facing complex and variable foundation pit environments, it can better maintain its shape and functional integrity, and optimize the contact state between the air bag mechanism and the foundation pit, making the pressure transmission more uniform and reasonable, and further enhancing the stability of the foundation pit structure.

[0051] In an embodiment, as shown in Figures 1 to 3 In order to reduce the tightness and neatness of the spliced air bag mechanism, the telescopic pipe 10 is a telescopic square pipe, that is, the cross section of the telescopic pipe 10 is square, and the plurality of vertical through slots 100 are respectively located at each corner of the telescopic square pipe. In specific implementation, the "reinforcing frame 110" of the air bag 20 will be located at each corner of the telescopic square pipe.

[0052] It can be understood that, on the one hand, the "reinforcing frame 110" located at each corner of the telescopic square pipe can provide more accurate support and positioning for the air bag 20 during the expansion process. On the other hand, when a plurality of air bag mechanisms are spliced together, the square pipe can improve the tightness and neatness of the spliced air bag mechanism, reduce the size of the splicing gap, and avoid problems such as uneven local stress or poor pressure transmission caused by the existence of the gap, thereby improving the stability and safety of the entire foundation pit protection.

[0053] In a specific embodiment, as shown in Figures 1 to 3 In order to reduce the irregularity of the air bag 20 after deflation, the air bag mechanism further includes at least two springs 3. The two springs 3 are respectively located at the two ends of the air bag 20, and each spring 3 is connected and fixed with the air bag 20 and the most adjacent end cover 11. When the air bag 20 expands and deflates, the spring 3 can provide uniform retraction force, so that the air bag 20 can smoothly retract along the preset trajectory during the deflation process, avoiding irregular retraction caused by uneven elasticity of the air bag 20 itself or external interference, reducing the problem of slight blockage of the through slot or wrinkle on the inner wall of the telescopic pipe 10 in some areas of the air bag 20, and ensuring the structural integrity for the next use.

[0054] In one specific embodiment, the airbag 20 is made of high-density polyethylene (HDPE) or polyvinyl chloride (PVC) and is fixed inside the device frame. Under normal conditions, it is in a retracted and folded state. After inflation, it pops out evenly from four directions of the frame. As the airbag 20 is continuously inflated, it can eventually form a circular support structure that fits against the inner wall of the pit.

[0055] In one specific embodiment, such as Figure 6 As shown, in order to improve the structural stability of the end cap 11, a feasible structure for the end cap 11 is further provided. A reinforcing frame 110 is provided on both end caps 11. The reinforcing frame 110 is located on the side of the end cap 11 close to the airbag 20. In specific implementation, the reinforcing frame 110 can be designed as an annular protrusion structure. The annular reinforcing frame 110 can enhance the strength of the edge part of the end cap 11, so that it is not easy to deform or be damaged when it is subjected to the pressure generated by the expansion of the airbag 20 and the possible external impact force, thus avoiding stress concentration on the end cap 11 and causing local cracking of the end cap 11, thereby effectively improving the structural stability of the end cap 11.

[0056] In one embodiment, in order to protect the inflation / deflation component 21, a transparent acrylic protective cover is also installed on the end cap 11 to cover the core component at the top of the device and prevent crushing damage.

[0057] In one embodiment, a feasible structure for the inflation / deflation component 21 is further provided. The inflation / deflation component 21 includes an inflation pump and a deflation valve. The inflation / deflation component 21 is integrated into the communication port of the end cap 11 for easy operation and maintenance.

[0058] In one specific embodiment, such as Figures 3 to 6 As shown, a feasible structure for the telescopic tube 10 is further provided. The telescopic tube 10 includes multiple telescopic plates 101. The two ends of the multiple telescopic plates 101 are respectively connected and fixed to two end caps 11. The multiple telescopic plates 101 are arranged circumferentially around the axis of the end caps 11 to form the telescopic tube 10. A gap is left between two adjacent telescopic plates 101 to form a vertical through groove 100. For example, if the cross-section of the telescopic tube 10 is square, the telescopic plates 101 will be arranged in a cross shape to form a square telescopic tube 10. In specific implementation, the connection between multiple telescopic plates 101 and two end caps 11 forms a temperature telescopic component 1, which allows the telescopic tube 10 to expand and contract accordingly when the airbag 20 expands or contracts. That is, as the airbag 20 expands, it will drive the telescopic tube 10 to expand and contract. When the telescopic plate 101 expands and contracts to the top, the airbag 20 will further expand radially outward along multiple vertical through grooves 100 on the side wall of the telescopic tube 10 and elastically abut against the groove wall of the vertical through groove 100 until it abuts against the inner wall of the pit.

[0059] In an embodiment, as shown in Figures 3 to 6 The telescopic plate 101 includes, from bottom to top, a bottom plate body 1010, a plurality of intermediate plate bodies 1011, and a top plate body 1012 connected in sliding sequence; the bottom plate body 1010 is connected and fixed with one end cover 11, and the inner wall of the bottom plate body 1010 is provided with a bottom vertical sliding groove 10100 for the sliding of the intermediate plate bodies 1011; the inner wall of the intermediate plate body 1011 is provided with an intermediate vertical sliding groove 10110 for the sliding of the intermediate plate body 1011 or the top plate body 1012, and the outer wall of each intermediate plate body 1011 is provided with an intermediate sliding block 10111; the top plate body 1012 is connected and fixed with the other end cover 11, and the outer wall of the top plate body 1012 is provided with a top sliding block 10120; wherein: the intermediate plate body 1011 closest to the bottom plate body 1010 slides in the bottom vertical sliding groove 10100 through the intermediate sliding block 10111; between the adjacent two intermediate plate bodies 1011, the intermediate plate body 1011 close to the top plate body 1012 slides in the intermediate vertical sliding groove 10110 of the intermediate plate body 1011 close to the bottom plate body 1010 through the intermediate sliding block 10111; the top plate body 1012 slides in the intermediate vertical sliding groove 10110 of the intermediate plate body 1011 closest to the top plate body 1012 through the top sliding block 10120; it should be pointed out that the sliding stroke of each sliding block is limited by the sliding groove itself to avoid the sliding of each plate body, so that the telescopic tube 10 is telescopic, and after the telescopic tube 10 reaches the top, the telescopic tube 10 will guide the air bag 20 to expand outward from the vertical through groove 100, and in specific implementation, through the above sliding connection structure, the telescopic plate 101 can flexibly adjust its length according to actual needs, when it needs to be lengthened, the air bag 20 drives each plate body to slide upward in sequence, so that the overall length of the telescopic plate 101 increases; and when it needs to be shortened, the air bag 20 drives each plate body to slide downward in sequence, so that the length of the telescopic plate 101 is reduced.

[0060] In this embodiment, the telescopic tube 10 can be made into a three-layer telescopic structure and made of aluminum alloy or carbon fiber material, and the protective structure has a compression strength ≥500N / cm 2 The telescopic tube 10 can be stretched from 1 meter to 2 meters or 3 meters in size, so that the device can fill the foundation pit with different depths in the construction site.

[0061] It can be understood that the telescopic tube 10 adopts such a structure driven by the air bag 20 to freely telescope, and the telescoping of the telescopic tube 10 is achieved by the automatic locking of the expansion of the air bag 20, which is very consistent with the actual use requirements. In some other possible embodiments, the telescopic tube 10 can also have telescopic locking members, for example, a plurality of vertical through holes are arranged on the top and bottom of each plate body, and then a shrinkage bolt and a nut are matched, and in specific implementation, the telescoping length of the telescopic tube 10 can be determined first, and then the air bag 20 is inflated to expand.

[0062] In a specific embodiment, the outer wall of the telescopic tube 10 is further provided with a connecting piece for splicing and fixing with different air bag mechanisms; specifically, the connecting piece can be a magic tape, or a magnet, or a buckle connection. When splicing the air bag mechanisms in specific implementation, the connecting piece is used to splice multiple air bag mechanisms into an integrated pit anti-falling filling safety device. For example, when the foundation pit depth exceeds 3 meters and the diameter is greater than 60 centimeters, multiple devices can be spliced by magic tape to adapt to larger size foundation pits.

[0063] In a specific embodiment, a control mechanism is further provided, which includes a main control module of a model STM32 single-chip microcomputer, a power supply module, a sensing module, a driving module, a display module and a warning module connected with the main control module.

[0064] In the specific execution of the embodiment, the following steps are taken: initialization: after the model STM32 single-chip microcomputer is started, the parameter configuration of the ADC module (analog-to-digital converter), the driving circuit and the peripherals is completed; inflation control: after receiving the start signal, the inflation pump driving circuit is turned on, the air pressure data is collected in real time and converted into a digital signal, and the inflation is stopped when the rated pressure value is reached; pressure monitoring: after inflation is completed, the continuous monitoring mode is entered, the air supplement program is started when the air pressure is lower than the rated value, and the sound and light alarm is triggered if the air supplement is not up to standard after the air supplement timeout; state warning: the warning light display (green constant / yellow flashing / red constant) and the sound and light alarm are controlled according to the air pressure state; when the warning light is green and constant, and there is no sound alarm feedback, the air pressure detection is normal; when the warning light is switched to yellow flashing, and the sound and light alarm intermittently rings, it indicates that the air pressure is insufficient and enters the air supplement mode, and when the air supplement is completed, it returns to normal; when the warning light is switched to red constant, and the sound and light alarm continuously rings, it indicates that the air pressure is abnormal and cannot be recovered; the response time of the air supplement program is ≤1 second, and the timeout judgment threshold is 3 minutes; the air pressure data is input into the ADC module after being preprocessed by the signal conditioning circuit, and the conversion accuracy is not less than 12 bits;

[0065] In an embodiment, the model STM32 single-chip microcomputer collects air pressure data through the ADC module, compares the preset rated pressure value, controls the inflation pump to start and stop, and drives the display module and the warning module at the same time; core chip selection: the model STM32F103RCT6 single-chip microcomputer is used, which is based on the model ARMCortex-M3 core, has a main frequency of 72MHz, has a model 128KB Flash memory (satisfies program storage and alarm log recording), a model 20KB SDRAM (supports real-time data buffering), adapts to industrial wide temperature range (-40℃ to 85℃), and meets the harsh environment requirements of the construction site.

[0066] In an embodiment, the sensing module contains a gas pressure detection component, the sensing module contains a model MPX5700DP pressure sensor and a signal conditioning circuit; the signal conditioning circuit integrates amplification and filtering units, the gas pressure detection error is ≤±2 kPa, and the data acquisition frequency is once every 500 ms; in specific implementation, a model MPX5700DP piezoresistive pressure sensor (range 0-700 kPa, sensitivity 1.2 mV / kPa) is connected to the air bag 20 through a 15-20 cm metal bellows, the bellows can absorb vibration on the construction site and reduce the influence of mechanical interference on the sensor; the weak analog signal (0.2-4.8 V) output by the sensor is first amplified by 100 times by an OPA2340 operational amplifier (the amplification factor is determined by a resistor network R1=1 kΩ, R2=100 kΩ), and then the power frequency interference is filtered out by an RC low-pass filter (R=10 kΩ, C=0.01 μF, cutoff frequency 10 Hz); the conditioned signal is input to the STM32 ADC1 channel 0, and a continuous conversion mode is adopted, triggering collection once every 500 ms, with a single conversion time of 1.17 μs, and further reducing noise by a sliding average algorithm (8 times sampling average).

[0067] Among them, the sensing module further includes an auxiliary sensing module: a built-in model DS18B20 temperature sensor (-20℃ to 60℃ range, accuracy ±0.5℃), connected to the model STM32PB1 pin through a single bus, providing temperature compensation basis for air pressure data; the battery voltage is connected to the channel 1 of the ADC through a resistor voltage dividing circuit (dividing ratio 1:5), realizing real-time monitoring of the power.

[0068] In an embodiment, the power supply module includes a solar panel, a storage battery and a charging management circuit, which can output 12V / 5V dual stable voltage; the storage battery capacity is not less than 10 Ah, ensuring continuous work for more than 72 hours in a lightless environment; a 12V / 5V dual output power supply is adopted, the solar panel (18V / 10W) charges the 12V / 10 Ah storage battery through the MPPT charging management module (Maximum Power Point Tracking), the MPPT module communicates with the model STM32 through I2C, and the charging state is fed back in real time; the storage battery voltage is converted to 5V by the model LM1117-5V voltage stabilizing chip, which supplies power for the single-chip microcomputer, the sensor and the communication module; low power detection: the STM32 collects the storage battery voltage dividing signal through the ADC1 channel 1, when the voltage is ≤10.5V, the energy saving mode is automatically triggered: the LCD backlight (Liquid Crystal Module) is turned off (sending instructions through I2C), the warning light brightness is reduced to 50% (PWM duty cycle is halved), the Bluetooth module is turned off (sending sleep instructions), only the air pressure monitoring and core alarm functions are retained, and the endurance is prolonged to more than 96 hours.

[0069] In an embodiment, the driving module comprises a relay type air pump driving circuit and a triode type warning light driving circuit; the warning module comprises red, yellow and green three-color operation warning lights and an audible and visual alarm, the volume of which is greater than or equal to 85 dB; the driving module is connected with the air pump and the warning element, and the power supply module is a solar battery dual power supply structure; the air pump driving circuit adopts a SRD-05VDC-SL-C relay module, and the STM32PB3 pin output high level triggers the relay to be attracted, thereby turning on the 12V air pump power supply; the relay coil is connected in parallel with a continuous diode (1N4007) to suppress the reverse electromotive force and protect the single-chip microcomputer IO port; the on-off duty cycle of the relay is adjusted through a PWM signal to realize air power control (80% power corresponds to a duty cycle of 80%, and 40% power corresponds to a duty cycle of 40%); the three-color LED (Light Emitting Diode, Light Emitting Diode) warning light comprises red, yellow and green three-color LEDs, which are respectively driven through 2N3904 triodes (β=100), the base is connected with the STM32PB0-PB2 pin through a 1kΩ current limiting resistor, and the flashing frequency is controlled through a PWM signal generated by TIM2 (1Hz corresponds to a period of 1000ms, and the duty cycle is 50%).

[0070] In an embodiment, the display module is an LCD screen connected with the STM32 single-chip microcomputer through an I2C interface, and can display the air pressure value, working state and rated pressure threshold value (101kPa) in real time.

[0071] The second aspect of the present application provides a pit anti-falling filling safety device, comprising the air bag mechanism of the first aspect, a plurality of air bag mechanisms are arranged circumferentially around the same axis and are fixedly connected to each other through connecting pieces.

[0072] In the working process of the embodiment, when a pit appears, the pit anti-falling filling safety device formed by arranging a plurality of air bag mechanisms circumferentially around the same axis and fixedly connecting them to each other through connecting pieces is placed in the pit, the air bag mechanisms are started, and the plurality of air bag mechanisms jointly act to quickly fill the space around the pit, thereby forming an effective protective barrier to prevent personnel or objects from falling into the pit and ensuring safety.

[0073] The third aspect of the present application provides a protective foundation pit, comprising;

[0074] The foundation pit body;

[0075] The air bag mechanism of the first aspect or the pit hole anti-falling filling safety device of the second aspect is matched with the shape of the foundation pit body, is filled in the foundation pit body, and the outer peripheral wall of the air bag mechanism or the pit hole anti-falling filling safety device elastically abuts against the inner wall surface of the foundation pit body.

[0076] Among them, the person skilled in the art specifically selects the air bag mechanism or the pit hole anti-falling filling safety device, which can be selected according to the size of the specific foundation pit body. If it is relatively small, the air bag mechanism is selected, and if it is relatively large, the pit hole anti-falling filling safety device is selected.

[0077] In the working process of the embodiment, when the foundation pit operation is performed, the pit hole anti-falling filling safety device matched with the shape of the foundation pit body is filled in the foundation pit body. Since the outer peripheral wall of the pit hole anti-falling filling safety device elastically abuts against the inner wall surface of the foundation pit body, the device can closely fit the inner wall of the foundation pit and cannot be shaken or displaced. In the process of the foundation pit operation, once a person or object accidentally approaches the edge of the foundation pit, the protective foundation pit can effectively prevent it from falling into the pit, thereby providing reliable safety guarantee for the foundation pit operation, greatly reducing the probability of safety accidents, and protecting the life safety of construction personnel and the property safety of construction equipment. Moreover, the protective foundation pit can be adapted according to the size and shape of different foundation pits by selecting a proper number and arrangement of pit hole anti-falling filling safety devices, and has strong universality and flexibility.

[0078] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiments, which will not be described here.

[0079] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit it. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features. The modification or replacement does not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

[0080] Finally, it should be noted that, in this paper, relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations.

Claims

1. An airbag mechanism, characterized in that, include: A telescopic assembly includes an axially telescopic tube and two end caps. The two end caps are fixedly connected to both ends of the telescopic tube, and one end cap has a communication port. The side wall of the telescopic tube is provided with a plurality of vertical through slots. Each vertical through slot extends along the axial direction of the telescopic tube and passes through the two end caps. The plurality of vertical through slots are arranged circumferentially around the axis of the telescopic tube. An airbag assembly, comprising an airbag and an inflation / deflation device, wherein the inflation / deflation device is installed on the connecting port, the airbag is disposed inside the telescopic tube, the airbag is connected and communicates with the inflation / deflation device, and the airbag is configured to expand outward along the vertical through groove after inflation and elastically abut against the groove wall of the vertical through groove.

2. The airbag mechanism according to claim 1, characterized in that, The vertical through grooves are evenly arranged circumferentially around the axis of the telescopic tube.

3. The airbag mechanism according to claim 2, characterized in that, The telescopic tube is a telescopic square tube, and the multiple vertical through slots are located at each corner of the telescopic square tube.

4. The airbag mechanism according to claim 1, characterized in that, The airbag mechanism also includes at least two springs; The two springs are located at opposite ends of the airbag, and each spring is connected and fixed to the airbag and the adjacent end cap.

5. The airbag mechanism according to claim 1, characterized in that, The end cap is provided with a reinforcing frame, which is located on the side of the end cap close to the airbag.

6. The airbag mechanism according to claim 1, characterized in that, The telescopic tube includes multiple telescopic plates; The two ends of the plurality of telescopic plates are respectively connected and fixed to the two end caps. The plurality of telescopic plates are arranged circumferentially around the axis of the end caps to form the telescopic tube. A gap is left between two adjacent telescopic plates to form the vertical through groove.

7. The airbag mechanism according to claim 6, characterized in that, The telescopic plate includes a bottom plate, multiple intermediate plates, and a top plate that are slidably connected from bottom to top. The base plate is connected and fixed to one of the end caps, and the inner wall of the base plate is provided with a bottom vertical sliding groove for the intermediate plate to slide. The inner wall of the intermediate plate is provided with a central vertical sliding groove for the intermediate plate or the top plate to slide, and the outer wall of each intermediate plate is provided with a central slider. The top plate is connected and fixed to the other end cap, and the outer wall of the top plate is provided with a top slider; in: The middle plate closest to the base plate slides within the bottom vertical sliding groove via the middle slider; Between two adjacent intermediate plates, the intermediate plate located near the top plate slides within the central vertical sliding groove of the intermediate plate located near the bottom plate via its central slider; The top plate body slides within the central vertical sliding groove of the intermediate plate body closest to the top plate body via the top slider body.

8. The airbag mechanism according to claim 1, characterized in that, The outer wall of the telescopic tube is also provided with a connector, which is used to splice and fix with different airbag mechanisms.

9. A safety device for filling potholes to prevent falls, characterized in that, It includes multiple airbag mechanisms as described in any one of claims 1 to 8, wherein the multiple airbag mechanisms are arranged circumferentially around the same axis, and adjacent airbag mechanisms are connected and fixed to each other.

10. A protective foundation pit, characterized in that, include; The foundation pit itself; The airbag mechanism according to any one of claims 1 to 8 or the pit fall prevention filling safety device according to claim 9; the airbag mechanism or the pit fall prevention filling safety device matches the shape of the pit body, the airbag mechanism or the pit fall prevention filling safety device fills the pit body, and the outer peripheral wall of the airbag mechanism or the pit fall prevention filling safety device elastically abuts against the inner wall surface of the pit body.

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