431 results about "Falling Objects" patented technology

The present invention discloses a climbing scaffold with one or more working levels, which includes an anchoring unit with main brackets supporting at least one assisting mechanism that is integral with a formwork unit; the anchoring unit is anchored to a wall and additionally, a second level can be attached, which includes a telescopic structure supporting a safety net for falling objects. The climbing scaffold includes passage or work platforms with safety measures such as guardrails conveniently arranged, and furthermore, the climbing scaffold is primarily stiffened with transverse beams.

The invention discloses a prefabricated conical shell steel supporting structure capable of being hoisted for squat silo construction. The prefabricated conical shell steel supporting structure comprises a conical shell wall plate assembly, a ring beam assembly, a radial beam, a lifting lug assembly, an adjustable supporting assembly, an anti-swing assembly, a connecting assembly, an auxiliary positioning assembly and a sling connecting assembly. Core components such as the conical shell wall plate and the supporting framework are all prefabricated in a factory, the quality is controllable, splicing and hoisting are only needed on site, high-altitude erecting operation is greatly reduced, the high formwork erecting risk and the hidden danger of falling objects from high altitudes are reduced, hoisting stability is high, safety is improved, hoisting stress is dispersed through the lifting lug stiffening plates, and the hoisting efficiency is improved. The anti-swing assembly and the cable wind rope cooperatively control swing, it is ensured that the overall hoisting process is stable, structural collision and stress overload are avoided, the splicing precision is high, the adaptability is high, adjustability during installation is achieved through the adjustable supporting assembly arranged on the squat silo top, and it is ensured that the hoisted steel supporting structure can accurately fall on the preset position of the squat silo top.

The invention discloses a civil building construction support which comprises a main body supporting frame, a first limiting mechanism, a second limiting mechanism and at least one mounting beam. The main body supporting frame comprises a first edge supporting rod and a second edge supporting rod which are oppositely arranged; the first limiting mechanism is arranged on the first edge supporting rod; the second limiting mechanism is arranged on the second edge supporting rod; the hinged end of the mounting beam is hinged to the first edge supporting rod through a rotating pair so that the swingable end of the mounting beam can rotate in the horizontal plane. A locking structure is arranged at the swingable end of the mounting beam and can be switched between the state of being locked to the first limiting mechanism and the state of being locked to the second limiting mechanism. According to the civil building construction support, the process of building a standing platform is simple and easy, and the risk rate of falling objects from high altitudes is reduced.

The invention belongs to the technical field of geotechnical engineering drilling, and particularly relates to an instant pipe-following anti-falling object device for broken stratum drilling, which comprises a drilling machine power head and a drilling rod, a drill bit is arranged at one end of the drilling rod, an inner wall protection sleeve is arranged outside the drilling rod, and the inner wall protection sleeve is connected with the drilling machine power head through a linkage assembly. An outer wall protection sleeve is arranged outside the inner wall protection sleeve, the outer wall protection sleeve and the inner wall protection sleeve are connected through an elastic assembly, a sliding fit clearance cavity is formed between the outer wall protection sleeve and the inner wall protection sleeve, and a sliding guide assembly and a permanent magnet assembly are arranged in the sliding fit clearance cavity; a sensing assembly and a propelling assembly are arranged on the drill rod; according to the device, by integrating the linkage assembly, the elastic assembly, the permanent magnet assembly and the central controller, instant synchronous movement of the wall protection sleeve and the drill bit is achieved, hole wall collapsing objects are effectively blocked, drill burying and drill jamming accidents are completely eradicated, and the construction efficiency is improved.

The utility model discloses a tunnel punching device, which belongs to the technical field of tunnel machinery and comprises a bearing plate, a drilling machine, a driving mechanism, a driving mechanism and a driving mechanism. The slag receiving cylinder and the water storage tank are both arranged on the bearing plate, and the drill bit movably penetrates through the bottom wall of the slag receiving cylinder; the annular pipe is arranged on the periphery of the slag receiving cylinder, and a plurality of spray heads are communicated with the annular pipe; the conversion cylinder is arranged on the water storage tank, and the conversion cylinder is connected with a linkage mechanism; according to the scheme, most disintegrating slag generated during punching can fall into the slag receiving cylinder, so that the threat of falling objects is reduced, and the safety protection effect is improved; meanwhile, under the cooperation of the linkage mechanism and the driving mechanism, water in the water storage tank is guided into the conversion barrel through the linkage mechanism, then the water is sprayed out through a spray head on an annular pipe, the sprayed water can conduct dust falling treatment on the periphery of the punching position, and the construction environment and the health of workers are better protected; and moreover, the shielding of dust on the sight line can be reduced, and the punching quality and effect are greatly improved.

The present invention specifically relates to a steel structure bridge with an integrated full-bridge incremental launching method. It is characterized in that the bridge adopts a continuous steel beam structure, and is attached with bridge deck auxiliary facilities including anti-collision guardrails and anti-throwing nets. The anti-collision guardrails are arranged on both sides of the continuous steel beam structure, and the anti-throwing nets are arranged on the top surfaces of the anti-collision guardrails. During the incremental launching of the bridge, the bridge deck auxiliary facilities including anti-collision guardrails and anti-throwing nets are launched together with the main bridge steel structure. The present invention launches the auxiliary facilities such as anti-collision guardrails and anti-throwing nets and the main structure synchronously at one time to cross busy traffic arteries such as highways / railways, etc. There is no subsequent construction risk of high-altitude falling objects above the traffic arteries, ensuring that the bridge can quickly and safely cross busy traffic arteries such as highways / railways, etc., and realizing zero interference to the traffic arteries throughout the construction process.

The invention relates to the technical field of industrial safety monitoring, in particular to a fallen object accurate identification FOD calculation method based on a fixed tower and application of the fallen object accurate identification FOD calculation method. Comprising the following steps: synchronously acquiring multi-source heterogeneous sensing data; carrying out multi-modal data preprocessing and feature extraction; performing cross-modal feature fusion and representation construction; modeling and reasoning a time-space diagram neural network; and performing multi-dimensional threat quantification and decision output. According to the design of the invention, multi-modal sensor groups are deployed at the tower bottom, the tower middle and the tower top of a fixed tower in a layered manner, and a high-definition multispectral camera, a high-density laser radar and a distributed acoustic sensor are integrated, so that 7 * 24-hour full-automatic data acquisition is realized; according to the design, the time and environment limitation of manual inspection is eliminated, and the complex weather detection capability is improved by 80%; meanwhile, the sensor synchronously triggers the mechanism and the grading detection process, the single-frame data processing delay is less than or equal to 50ms, and the real-time monitoring requirement of an aircraft take-off and landing high-frequency scene is met.

The utility model discloses a safety helmet impact experience device with an automatic demonstration function, which comprises an experience cabin, a vertically arranged guide cylinder is arranged at the top of the experience cabin, a lifting rope and a lifting ball penetrate through the guide cylinder, a vertical guide rail is arranged at the top end of the outer wall of the experience cabin, a lifting seat is slidably arranged on the vertical guide rail, and the lifting seat is provided with a sliding block. A take-up and pay-off mechanism capable of pulling the lifting rope to ascend is arranged on the lifting seat; a lifting table is arranged in the experience cabin, and a standing groove is formed in the middle of the lifting table. The utility model relates to a safety helmet impact experience device with an automatic demonstration function, which belongs to the technical field of safety training demonstration equipment and can demonstrate the situation that experiencers with different heights are hit by objects falling from high altitude after wearing safety helmets and adjust a hanging ball to fall from different heights, so that the experiencers feel hit by the objects with different heights.

The invention provides boiler water-cooled wall mechanical cutting equipment and a using method.The equipment comprises a cutting support, a carrying component is arranged at the bottom of the cutting support, pipeline walking components used for binding the cutting support to a water-cooled wall pipe are arranged at the two ends of the cutting support, and a cutting sliding seat is arranged at the upper end of the cutting support in a sliding mode; a cutting component used for cutting a pipeline is arranged at the upper end of the cutting sliding seat, the cutting sliding seat is connected with a position adjusting component used for driving the cutting position of the cutting sliding seat to be adjusted, and a clamping and transferring component used for transferring the cut-off pipeline is further arranged at the upper end of the cutting sliding seat. A material carrying frame is fixedly arranged on the other side, opposite to the cutting component, of the cutting sliding base. The device is designed according to existing needs, power is provided for walking of the device in a holding mode, the safety of the device is improved by means of self-shrinkage of thread transmission, in addition, a cut pipe body can be stored, the problem that objects fall from high altitudes is solved, and the cutting safety is further improved.

The invention discloses a building high-altitude falling object identification and active protection system and a use method, and relates to the technical field of building high-altitude falling object prevention, and the system comprises an acquisition module, a high-altitude falling object detection and identification module, a high-altitude falling object protection module, a warning system and an edge computing device. The acquisition module is used for monitoring a high-altitude environment outside a building; the multi-source data collected in real time is transmitted to the high-altitude falling object detection and recognition module, and the high-altitude falling object detection and recognition module judges whether a high-altitude falling object occurs or not according to signals in the multi-source data; and when the falling object is confirmed to be the high-altitude falling object, an alarm is given to a warning system in the falling area, and meanwhile, the high-altitude falling object protection module is triggered to actively intercept the high-altitude falling object. According to the method, the effect of dynamically adjusting the high-altitude anti-falling strategy is achieved through the spatial-temporal feature fusion technology; the large-scale deployment of the building can be realized based on the edge computing equipment, and the danger of falling objects from high altitudes is prevented.

The utility model discloses an external hanging type overhanging anti-smashing shed which comprises supporting rods, a reinforcing cross beam, supporting beams and a supporting panel, the two ends of the reinforcing cross beam are fixedly connected with the supporting rods respectively, the ends of the supporting rods are connected with the supporting beams, the supporting panel is installed between the supporting beams to bear falling objects, and reinforcing inclined struts are further arranged between the supporting rods and the supporting beams. The anti-smashing shed can be assembled on site and then fixedly installed on a beam body or a wall body through the supporting rods, the externally-hung anti-smashing shed is formed, installation is easy, the number of interpenetrating processes is small, the construction speed is high, efficiency is high, the anti-smashing shed is formed through pre-assembling, and the safety risk when the anti-smashing shed is externally hung on the high wall body is reduced.

The invention relates to the technical field of safety helmet detection, in particular to a pressure-resistant puncture detection device for a safety helmet based on underground construction safety, which is based on a conventional detection mode of applying pressure to the safety helmet to perform puncture and improves a puncture detection structure and a puncture mode in multiple aspects. The method specifically comprises the steps that through cooperation between a feeding mechanism which obliquely operates upwards and a positioning die head which can rotate by 360 degrees and has a negative pressure adsorption positioning function, stacked safety helmets are intermittently and automatically fed to the positioning die head, and then the safety helmets are rotated to the position below a piercing groove; the positioning die head is driven by the rotating column to rotate along the transverse axis of the positioning die head and rotate circumferentially, the piercing position, vertically corresponding to the piercing groove, of the safety helmet is changed, different detection points on the safety helmet are detected through the horizontally-moving piercing mechanism, and on the basis, pushing pressure is given, and a free falling piercing mode is combined, so that the safety helmet can be detected. Free falling body type impact of an upper falling object during actual underground construction can be simulated.

The invention discloses an aerial work platform frame assembly tool which comprises an assembly platform, a rear axle centering mechanism, a side plate clamping mechanism, a seat ring positioning mechanism, a middle partition plate positioning mechanism and a front partition plate positioning mechanism, wherein the rear axle centering mechanism, the side plate clamping mechanism, the seat ring positioning mechanism, the middle partition plate positioning mechanism and the front partition plate positioning mechanism are arranged on the platform. The rear axle centering mechanism is used for supporting, centering and clamping a frame rear axle structure, the side plate clamping mechanism is used for supporting, positioning and clamping a side plate assembly, the seat ring positioning mechanism is used for carrying out height supporting and centering clamping on a frame seat ring assembly, and the middle partition plate positioning mechanism is used for supporting, clamping and positioning a middle partition plate assembly. The front partition plate positioning mechanism positions the front partition plate assembly. According to the method, the potential safety hazard and the efficiency bottleneck in the assembling process of the aerial work platform frame are effectively solved. Operators do not need to frequently operate hoisting equipment, so that the risk of falling objects from high altitudes is reduced; positioning of all parts is automatically completed through a mechanical mechanism, and the assembling operation time is shortened; the positioning precision is guaranteed by a mechanical structure, and the assembly consistency is remarkably improved.

The invention relates to the technical field of iron tower construction safety control, in particular to a range-adjustable offshore high-rise iron tower anti-falling device which comprises a construction platform arranged on the sea, cement piles are arranged on the sea around the construction platform, and an iron tower body is arranged on the construction platform. The anti-falling iron tower is characterized in that an anti-falling device is arranged on the iron tower body and used for conducting three-dimensional protection on aerial work personnel and falling objects in the construction process, and the anti-falling device comprises a protective net body, an adjusting mechanism, a climbing mechanism and a synchronous control system. Multi-winch collaborative operation, real-time monitoring adjustment and self-adaptive protection are achieved, the safety protection problem of offshore aerial work is effectively solved, and construction safety and operation efficiency are remarkably improved.

The invention provides an anti-falling device for building construction management, which structurally comprises balance blocks, positioning blocks, locking bodies, grooves and a protective structure, the balance blocks are arranged at the upper and lower positions of the positioning blocks, the positioning blocks are mounted on a building through the locking bodies, and the positioning blocks are connected with the two ends of the protective structure through the grooves; on the basis of the stainless steel positioning block and the locking body, the two ends of the anti-rust body can be positioned through the grooves, then the anti-rust body is fixed through a rebound frame, a rubber block and a magnetic attraction block, the effect of convenient disassembly and assembly is achieved, and then building falling objects can be effectively received and positioned through a rebound net and an elastic block in a receiving groove; and an original pure wood support and an independent rebound net are replaced, so that the durability is improved, the situation that the whole rebound net is punctured due to impact force is prevented, and the actual use strength of the anti-falling object can be improved.

The utility model relates to tower crane technical field, especially safety protection type tower crane, including main body stand, be equipped with a plurality of support frame and with the installation block that is connected to it on main body stand, a plurality of protective net, protective net is connected with the installation block through second mounting bolt, a plurality of telescopic subassembly, telescopic subassembly both ends are connected with the installation block and support plate respectively through connecting component, and support plate bottom end is connected with fixed cone, a plurality of building link frame, and building link frame includes spiral groove disc and cross -bracing pull frame, spiral groove disc is connected support frame through carousel, and cross -bracing pull frame is connected spiral groove disc through plug connector, the utility model discloses through the setting of telescopic subassembly and installation block, can four -sided support to tower crane body, and the ability of anti -tilting is strengthened, through the setting of protective net, can undertake the component such as falling, effectively reduce the risk of high -altitude falling object to hurt the equipment and the personnel below, utilize the overall structure of building to share horizontal load, and the stability is strengthened.

The utility model discloses a small fallen object fishing cylinder which is characterized by comprising a cylinder body, an upper connector is arranged at one end of the cylinder body, a lower connector is arranged at the other end of the cylinder body, the lower connector is connected with a milling shoe or a pulling hook, and through the large drift diameter design of a second inner cavity, the fishing requirement of rubber or other large-diameter small fallen objects in a well is met. The adaptability to falling objects with different sizes is improved; a milling shoe is designed aiming at the scaling problem of the casing wall, and the scale can be removed through ground rotation, so that a fishing tool can smoothly reach the fish top position, and the fishing operation can be smoothly carried out; a pulling hook is designed for solving the problem that small iron falling objects are prone to being stuck, the stuck falling objects can be pulled out, and the fishing success rate is increased. The lengthened fishing cavity is designed, the situation that the number of small falling objects is large can be handled, and the fishing efficiency is improved.

The utility model relates to express sorting technical field, concretely relates to a sorting frame and sorting system. The sorting frame includes backboard, guide structure and two side plates, and the two side plates are spaced apart in the first direction, the backboard is connected to one side of the two side plates in the second direction to cooperate with the two side plates to define a falling object space, and the side of the falling object space away from the backboard is formed with an entrance, the guide structure includes a first guide plate, the first guide plate includes a first guide plate body, the first guide plate body is arranged at the entrance, and the first guide plate body gradually extends towards the gravity direction and the direction close to the backboard from the side away from the backboard, wherein the first direction, the second direction and the gravity direction are perpendicular to each other, specifically, most of the articles pushed out of the conveying belt are first received by the first guide plate body arranged obliquely, and then further guided away from the conveying belt, so that the articles will not overturn under the action of gravity and hit the lower conveying belt.

The utility model discloses a high-altitude building construction hoisting protection assembly in the technical field of building construction, which comprises two fixed frames, the two fixed frames are arranged in parallel relatively, four corners of the two fixed frames close to each other are fixedly connected with fixed plates, the side walls of the plurality of fixed plates, which are matched in position, are jointly and fixedly connected with a reinforcing column, and the reinforcing column is fixedly connected with the reinforcing column. The outer walls of the two fixing plates and the outer wall of the fixing frame are jointly and fixedly connected with a protective net, and movable columns are arranged on the side walls of the ends, matched in position, of the multiple fixing plates. Through the combined design of the fixing frame, the fixing plate, the reinforcing columns and the protective net, the whole protective assembly has extremely high stability, various impact forces in the hoisting process can be effectively resisted, meanwhile, the situation that objects fall from high altitudes due to unstable bundling or center-of-gravity shift when a steel pipe of a frame or other building equipment is hoisted can be avoided, and the construction safety is improved. And safety accidents caused by falling objects from high altitudes are avoided.

The utility model relates to the technical field of construction hanging baskets, in particular to a novel hanging basket type operation platform which comprises a rectangular installation frame, connecting pieces are symmetrically installed on the top of the rectangular installation frame, limiting sliding rods are symmetrically connected to the inner side wall of the rectangular installation frame, and adjusting frames are connected to the limiting sliding rods in a sliding mode. A working hanging basket platform is fixedly mounted on the outer side wall of the adjusting frame, a lifting assembly used for driving the adjusting frame to move is arranged on the rectangular mounting frame, a rotatable falling object collecting assembly used for collecting falling objects is connected to the working hanging basket platform, and the lifting assembly comprises a lifting motor. The lifting assembly comprises a lifting motor, the lifting motor is fixedly connected to the center position of the top of the rectangular mounting frame, the lifting assembly comprises a lifting motor, and the lifting motor is fixedly connected to the center position of the top of the rectangular mounting frame. And meanwhile, tools accidentally falling off by workers can be collected, so that the safety is improved.

The embodiment of the present application discloses a hanging basket with safety anti-falling net, which comprises a hanging basket body, an anti-falling net and a connecting chain rope, the lower end of the anti-falling net is rotatably connected with the lower end of the outer periphery of the hanging basket body, the upper end of the anti-falling net is connected with the upper end of the outer periphery of the hanging basket body through the connecting chain rope, and the connecting chain rope is used for winding up or unwinding the anti-falling net. The hanging basket with safety anti-falling net has the effect of preventing high-altitude falling objects by arranging the anti-falling net around the hanging basket body, and the anti-falling net and the hanging basket body are connected through the connecting chain rope, so that the anti-falling net can be wound up or unwound.

The utility model relates to the technical field of civil engineering, in particular to a steel structure protective shed for protecting a high slope of a tunnel portal, which comprises supporting columns and a supporting assembly, the supporting assembly comprises an X-shaped limiting rod, a limiting piece, a limiting bolt, a connecting rod, a connecting plate, a connecting bolt and a top component, and a plurality of supporting columns are erected in front of the tunnel portal. The expansion angle of the X-shaped limiting rod is adjusted, then the two ends of the X-shaped limiting rod are screwed and fixed through the limiting bolts, the two supporting columns are reinforced through the connecting rod, the two ends of the connecting rod are fixed to the connecting plates, and the connecting bolts penetrate through the connecting plates to be screwed and fixed to the supporting columns in a threaded mode. And finally, the top is reinforced and protected through the top component to prevent falling objects, use safety is guaranteed through multi-directional connection and fixation, assembly is conducted in a threaded connection mode, and disassembly and secondary assembly are more convenient.

The utility model relates to the technical field of petroleum and natural gas drilling, in particular to a multifunctional rod piece fallen object fisher, which comprises an upper connecting thread, a body, a grabbing and fishing tooth plate, a fixing bolt, a lower connecting thread and a guide device, the upper portion of the body is a connecting end connected with a drilling tool, and the lower portion of the body is connected with the guide device. At least one grabbing and fishing tooth plate set is arranged in the body in the axial direction at intervals, each grabbing and fishing tooth plate set comprises at least two grabbing and fishing tooth plates, and the grabbing and fishing tooth plates in each grabbing and fishing tooth plate set are arranged in the body in the circumferential direction at intervals. And an elastic piece for promoting the grabbing and fishing tooth plate to do reciprocating motion along the radial direction of the body is arranged between each grabbing and fishing tooth plate and the body. The fisher can fish out small rod piece falling objects, and the situation that due to the fact that the falling objects cannot be effectively fished out of a borehole, faults are complicated is avoided.

The application relates to the technical field of elevator shaft protection structures, improves the inconvenient installation and removal of the prior art, and discloses an elevator shaft opening protection structure which comprises a limiting rod, a seat body and two sliding rods, the length of the limiting rod is greater than the width of an elevator door opening, the seat body is abutted against the inner wall of an elevator shaft opening from the inner side of the elevator shaft opening, one end of the sliding rod is slidingly connected to the seat body, the other end is upwardly inclined and abutted against the inner wall of the side of the elevator shaft opening which is away from the seat body, the seat body is provided with a first driving assembly for controlling the mutual approach or separation of the two sliding rods, a blocking net assembly for blocking falling objects is arranged between the two sliding rods, a plurality of blocking rods are rotationally connected to one side of the two sliding rods in the length direction, a second driving assembly is arranged in the sliding rod, and the seat body is provided with a linkage member which enables the second driving assembly to simultaneously control the movement of the blocking rods after the sliding rod slides. The application can provide a convenient-to-install and remove elevator shaft protection structure, so as to increase construction efficiency and increase the service life of the structure.

The utility model discloses an anti-falling device for building construction, which comprises a support, a pedal is arranged at the top of the support, a protection mechanism is arranged on one side of the pedal, the protection mechanism comprises a frame body, the bottom of the frame body is fixedly connected with a first spring, the bottom of the first spring is fixedly connected with a rectangular plate, and the bottom of the rectangular plate is fixedly connected with a second spring. Vertical columns are fixedly connected to the four corners of the top of the rectangular plate, and semi-spheres are fixedly connected to the tops of the vertical columns. By arranging the protection mechanism, when protection is needed, a movable rod is rotated, then a second protection net plate is rotated, the second protection net plate drives a clamping base to rotate, the clamping base is clamped to the movable rod, and then the second protection net plate works stably; and in the pulling process of the first protective screen plate, the semi-sphere is separated from the arc-shaped groove, after the semi-sphere is clamped with the arc-shaped groove again, the first protective screen plate can work stably, then the falling objects can be blocked, and workers are prevented from being injured by crashing objects.

The utility model discloses a protection platform and relates to the technical field of construction protection equipment, the protection platform is used for a steel box girder, the steel box girder comprises a box girder body and a plurality of outrigger partition plates arranged corresponding to flange plates of the box girder body, and the protection platform comprises a platform frame and a protection structure. A connecting part and a mounting part are formed on the platform frame, and the connecting part is used for being detachably connected to the cantilever beam partition plate. According to the technical scheme, the connecting part is detachably connected with the cantilever beam partition plate, the platform frame and the cantilever beam partition plate can be assembled and disassembled, the purpose of recycling the protection platform is achieved, the protection platform is further suitable for being used by other steel box girders, and the service life of the protection platform is prolonged. And the mounting part laterally protrudes out of the flange plate, and a bearing channel is expanded on the steel box girder, so that the effect of bearing falling objects conveniently is achieved, and the safety of a test vehicle on a high-speed loop is protected.

The utility model relates to a cigarette package unloading technology field especially relates to a set of cigarette package unloading protection device. Including: support part and first protection part, the support part is arranged at the both sides of truck, and the truck is loaded with the cigarette package to be unloaded, first protection part is arranged at the both sides of truck, and one end of first protection part is connected with one side of support part, and the other end is connected with the side of truck, and first protection part forms at least two layers of protection structure for intercepting falling objects in the vertical direction of both sides of truck. The device forms two layers of protection structure for intercepting falling objects at the both sides of truck, forms double -deck protection at the both sides of truck, and the cigarette package on the truck and the people and things near the truck are all protected, and the operation risk is reduced.

The application relates to the technical field of safety helmets, in particular to an impact device for safety helmet testing, which aims to solve the problem that it is inconvenient to switch the impact head during testing, and comprises a base, two vertical plates fixedly installed on the upper surface of the base, a sliding rod fixedly installed on the upper surface of the base, a folding assembly arranged above the base, an impact assembly arranged above the base, and a positioning assembly arranged outside the impact assembly. Through cooperation of a motor, a rotating wheel and a steel wire rope, the impact assembly can move downwards, the impact head can move downwards, the safety helmet can be impacted, the clamping ring can be rotated through the spring, the arc-shaped plate and the positioning block, the clamping ring can drive the rotating shaft and the triangular plate to rotate, the triangular plate can drive the pressure sensor, the conical head, the circular head and the square head to switch, so that the device can simulate different falling objects when the safety helmet is tested, and the precision of the safety helmet impact test is improved.

The utility model discloses safety protection equipment for oil field underground operation, which comprises a base, a top plate is arranged above the base, the upper end of the base is provided with two and four sliding chutes, and a buffer mechanism for buffering the top plate is jointly arranged in the two sliding chutes on the same side. The buffering mechanism comprises two sliding blocks slidably connected into the two sliding grooves, grooves are formed in the upper ends of the two sliding blocks correspondingly, rotating rods are rotationally connected into the two grooves correspondingly, fixing blocks are rotationally connected to the ends, away from the sliding blocks, of the two rotating rods correspondingly, and the upper ends of the two fixing blocks are fixedly connected to the lower end of a top plate. The side walls of the two sliding blocks are elastically connected with the inner wall of the sliding groove on the same side through springs. The device is reasonable in structure, falling objects can be blocked through the buffering mechanism and the top plate, meanwhile, when the falling objects make contact with the top plate, the top plate is buffered, top plate damage caused by impact force is avoided, and the service life of the device is prolonged.