[0027]The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.
[0028]SeeFigure 1-3 The present invention provides a technical solution: a municipal engineering foundation pit safety protection device, including a lower shell 21, characterized in that: the top of the lower shell 21 is fixed with a number of middle shells 4 by bolts, and the top of the middle shell 4 is bolted The upper casing 3 is fixed, and the top of the upper casing 3 is fixed with a lifting motor 2 by welding. The output shaft of the lifting motor 2 is movably connected with a screw 8 through a coupling, and the screw 8 passes through the upper casing 3 and the middle casing The body 4 and the inner wall of the lower housing 21, and one end of the screw rod 8 is in contact with the bottom inner wall of the lower housing 21, the outside of the screw rod 8 is movably connected with a foot pedal 11 through a ball nut pair, and the top of the upper housing 3 A guide rail 9 is connected between the inner wall and the bottom inner wall of the lower housing 21, and the guide rail 9 is in sliding fit with the foot pedal 11. When an accident occurs, people gather around the lower housing 21 and enter the interior of the lower housing 21. Step on the pedal 11, turn on the lifting motor 2 at this time, its output shaft drives the screw 8 to rotate, and drives the pedal 11 to rise, and the personnel will pass through the middle shell 4 and the upper shell 3 to the ground from bottom to top The layer can allow people to enter when natural disasters such as collapse and earthquake occur in the foundation pit, and quickly rise to avoid the dangerous situation of being trapped in the pit;
[0029]There is a gap on one side of the upper shell 3, and the first escape door 1 is provided at the gap. When the personnel are transported to the upper shell, the first escape door 1 is opened and the inside personnel can walk out of the upper shell 3 for convenience Evacuation of personnel;
[0030] The cross section of the lower casing 21 is C-shaped, the lower casing 21 is a hollow structure, and the closing baffle 5 is evenly movably inserted into the lower casing 21, and one side of the closing baffle 5 is evenly provided with gear teeth 7, and the closing baffle A non-contact sensor is provided on one side of the plate 5, a protective shell 6 is provided on both sides of the lower shell 21, and a translation motor 14 is installed on both sides of the lower shell 21. The translation motor 14 is provided in the protective shell 6. Inside, the output shaft of the translation motor 14 is movably connected with a rotating shaft 13 through a coupling. A gear 12 is sleeved on the outside of the rotating shaft 13, and the gear 12 meshes with the gear teeth 7. When the person is about to enter, the non-contact sensor senses the person According to the height, the output shaft of the corresponding number of translation motors 14 is controlled according to the height, and the gear 12 is driven to rotate so that the closing baffle 5 slides in the lower housing 21, the entrance is opened and people enter quickly, and different numbers can be opened according to the height of the person The closed baffle 5 can avoid the problem of collapsed stones falling into the interior caused by the opening of the door to the greatest extent, and protect the safety of internal stranded personnel;
[0031]Such asfigure 2 with4, There is an armrest cover 10 installed on the top of the footrest 11, the number of footrests 11 is multiple, and they are stacked inside the lower shell 21, the armrest cover 10 is a flexible telescopic structure, when the first person enters, the top The foot pedal 11 moves upwards, and the armrest cover 10 underneath changes from a folded shape to an unfolded shape, which is convenient for people to have a place to support when rising;
[0032]Such asFigure 5 , A through hole is opened in the middle of the armrest cover 10, and a ball nut split sleeve 15 is arranged inside the through hole. The ball nut split sleeve 15 is made up of two semicircular ring structures. Two ball nut split sleeves 15 An engaging device 16 is connected between them. When a person steps on the foot pedal 11, the two ball nut split sleeves 15 are engaged with each other through the engaging device 16, and the foot pedal 11 will rise with the rotation of the screw 8. When no one is stepping on, the two ball nut split sleeves 15 are separated from each other. At this time, the foot pedal 11 will not rise with the rotation of the screw 8, which facilitates the orderly ascent of personnel;
[0033]The joining device 16 includes a telescopic cylinder. The foot pedal 11 is slidably connected with the ball nut split sleeve 15. The two ends of the telescopic cylinder are connected between the two ball nut split sleeves 15, and the lower housing 21 is provided with a controller. An infrared distance sensor and a pressure sensor are arranged on the top of the pedal 11, and the controller is electrically connected with the infrared distance sensor, pressure sensor and telescopic cylinder. When a person steps on the pressure sensor, the telescopic cylinder contracts and drives the two ball nut splits The sleeves 15 are combined with each other to drive the pedal 11 to rise. When the distance between the two pedals 11 is too close, the telescopic cylinder stretches. At this time, the pedal 11 no longer rises to avoid collisions and improve safety. In the process of people going up, the people underneath stand up on the foot pedals below, which greatly improves the efficiency of the improvement and facilitates the batch transportation of personnel;
[0034]Such asFigure 6 , The inside of the guide rail 9 is uniformly slidingly provided with a clamping block 20, the clamping block 20 is an inverted triangle structure, a spring 19 is connected between the two clamping blocks 20, the inside of the guide rail 9 is a hollow structure, and the top of the guide rail 9 is connected with a guide The air pipe 18 and one end of the air guide pipe 18 are connected with a vacuum pump 17, and the foot pedal 11 and the block 20 are in a matching structure. When the foot pedal 11 rises, it contacts the inverted triangle edge of the block 20. The block 20 shrinks inward and does not hinder the rise of the pedal 11. When the device fails, a person standing on the pedal 11 makes the pedal 11 fall by itself due to gravity. At this time, the block 20 does not enter the guide rail 9 and hinder the pedal. The lowering of the plate 11 can limit the foot pedal to a certain height to prevent it from falling, and protect the safety of the people below. When the obstacle is removed, the vacuum air pump 17 is started, which removes the air from the guide rail 9 to remove the block 20 Tucked into the guide rail 9, the pedal 11 freely falls to the bottom, which is convenient for quick restoration;
[0035]The inner wall of the middle shell 4 is provided with a number of accommodating grooves, and an anti-collision airbag is arranged inside the accommodating grooves. One end of the anti-collision airbag is connected with an inflator, and one side of the anti-collision airbag is provided with a deflation valve. It includes a valve body. The inside of the valve body is protrudingly provided with two annular discs. The two annular discs are separated by one end distance, and a valve plate is arranged in the middle. One side of the valve plate is fixed with a telescopic spring by welding. The annular discs are connected, and one side of the valve plate protrudes outwards with a pressing part. When the device is accidentally dumped, the inflator is turned on, which pumps air into the anti-collision airbag to prevent insiders from hitting the middle shell 4 The inner wall of the airbag is preferably an oxygen pump. When the internal staff presses the pressing part with their hands while inflating, the oxygen inside the anti-collision airbag can be squeezed out to prevent the problem of inability to ventilate due to long-term retention. When the equipment can be restarted, the pressing part can be pressed. At this time, the valve plate starts to move and is separated from the annular disc. At this time, the gas in the anti-collision airbag is released, the retractable spring is contracted, and the personnel fold the anti-collision airbag into the receiving groove Inside, it does not hinder the normal passage of the pedal 11;
[0036]The anti-collision airbag is provided with a number of one-way air valves, which can prevent the anti-collision airbag from conducting when it is suddenly subject to a large impact and prevent explosion.
[0037]It should be noted that in this article, relational 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 one of these entities or operations. There is any such actual relationship or order between. Moreover, the terms "include", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes those that are not explicitly listed Other elements of, or also include elements inherent to this process, method, article or equipment.
[0038]Finally, it should be noted that the above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, it is still for those skilled in the art. The technical solutions described in the foregoing embodiments may be modified, or some of the technical features may be equivalently replaced. Any modification, equivalent replacement, improvement, etc., made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
