30results about How to "Reduce impact energy" patented technology

The invention discloses a switch cabinet and a pressure relief device and method thereof, the pressure relief device comprises a pressure relief channel, a cover plate, a gauze element, an elastic connecting piece and an arc blocking assembly, the cover plate is arranged on the pressure relief channel, the first side of the cover plate is hinged to a side plate of the pressure relief channel, and the gauze element is fixed on the cover plate; one end of each elastic connecting piece is fixed on the cover plate, and the other end of each elastic connecting piece is connected with a side plate of the pressure relief channel through a fixing block; each arc blocking assembly is located in the corresponding pressure relief channel and comprises an arc blocking plate, an elastic piece and a supporting frame. At least one end of the supporting frame is fixed to a side plate of the pressure relief channel, the arc blocking plate is movably installed below the supporting frame through the guide column, and the elastic piece is arranged on the guide column in a sleeving mode and located between the supporting frame and the arc blocking plate. And a plurality of through holes are formed in the arc baffle. Pressure accumulation in the cabinet body is avoided, and damage of impact energy sprayed out of the cabinet body to the environment outside the cabinet body is reduced.

The invention belongs to the technical field of down-the-hole hammer drilling corollary equipment, and particularly relates to a near-bit stress wave clipping device which comprises a semicircular clamp, an anvil, an octagonal sleeve, a mounting step, a screw, a low-resistance clipping gasket, a high-resistance clipping gasket and a pressing ring. Stress waves are reflected multiple times through multiple interfaces, the stress wave peak value is effectively reduced, impact energy is reduced, and therefore a matched drill rod is protected; deformation of the whole device is small in the vibration reduction process, and the assembling relation of all parts in the whole equipment cannot be affected; according to the protection device, no easy-to-damage structure exists, the gasket sets are flat gaskets, clamped through screws and limited through the pressing rings, and the whole device is small in displacement and long in service life when being impacted; the protection device is simple in structure, convenient to install, low in manufacturing cost and beneficial to prolonging the service life of the drill rod, shortening the tripping time and improving the drilling efficiency.

The invention relates to the technical field of PETG polyester materials, and particularly discloses an impact-resistant modified PETG polyester material and a preparation method thereof, and the impact-resistant modified PETG polyester material comprises the following components: 50-80 parts of PETG resin, 10-30 parts of an impact-resistant modifier, 5-15 parts of a wear-resistant reinforcing agent, 1-5 parts of a stabilizer, 1-3 parts of a lubricant, 2-8 parts of a corrosion-resistant additive, and 1-3 parts of an antioxidant. The impact modifier is formed by compounding a methyl methacrylate-butadiene-styrene copolymer, an acrylonitrile-butadiene-styrene copolymer and an ethylene-octene copolymer according to a compounding ratio of 1: 1: 3, and the wear-resistant enhancer is formed by compounding ultra-high molecular weight polyethylene micro powder, nano ceramic particles and polytetrafluoroethylene micro powder. The compounding ratio range is 1: 1: 2. According to the impact-resistant modified PETG polyester material and the preparation method thereof, the impact-resistant modified PETG polyester material has relatively good impact resistance, wear resistance, corrosion resistance and oxidation resistance.

The invention discloses a lithium battery with a protection function and a processing technology. The lithium battery comprises a lithium battery body, the protection device comprises a base, protection plates symmetrically arranged at the top of the base, side plates, a top plate detachably connected with the protection plates and the side plates, a third rubber pad arranged at the top of the top plate, first rubber pads arranged on the protection plates, and second rubber pads arranged on the side surfaces of the side plates; the invention has the beneficial effects that the base, the protection plate, the side plates and the top plate form a six-direction rigid protection space, and the L-shaped reinforcing columns are matched to enhance the structural rigidity; the rubber pad and the ultra-thin ceramic fiber buffer film form an elastic buffer system, so that external force such as collision and extrusion is effectively resisted, and damage to the shell and damage to internal components are avoided; through precise positioning between limiting blocks and limiting grooves and between inserting plates and inserting grooves, a threaded rod is used for reinforcing and eliminating gaps, and the battery is prevented from shaking; the threaded connection design facilitates maintenance and replacement, and stability and practicability are both considered.

The invention belongs to the technical field of test devices, and particularly discloses a linear motion mechanism loading test safety protection device which comprises a damping energy dissipation mechanism, a fixing support and a protective cover. The damping energy dissipation mechanism comprises a first protection plate, a second protection plate, a damping plate, a movable sleeve rod, at least two positioning rods and damping springs arranged on the positioning rods in a sleeving mode. The damping plate is arranged between the two protection plates and is parallel to the two protection plates, the positioning rod is fixed between the two protection plates and penetrates through the damping plate, the two ends of the damping spring are fixed to the first protection plate and the damping plate respectively, and the movable sleeve rod penetrates through the second protection plate; in the loading test process of the linear motion mechanism, the damping energy dissipation structure and the linear motion mechanism are fixedly connected through a fixing support, and the damping energy dissipation structure is sleeved with a protective cover. When loading of the linear motion mechanism is out of control, the linear motion mechanism impacts the movable sleeve rod to axially and quickly move due to damage, the damping plate is pushed to move, the damping spring is compressed to do work, and impact on the linear motion mechanism is buffered.

The invention relates to the technical field of automobile safety tests, and provides an animal dog target object for automobile active safety function testing, the animal dog target object is used for automobile safety testing, a simulation dog is provided with a body and legs, the side face of the body of the simulation dog is provided with an inclined face used for receiving automobile collision, and the inclined face inclines towards the ground and is an arc-shaped protrusion; the end away from the leg extends to the end close to the leg, and the width of the inclined face is gradually reduced. By means of the technical scheme, the problems that in the prior art, a model is prone to damage due to impact, durability is low, testing cost is increased, and the model needs to be replaced frequently are solved.

The application provides a buffering structure, a battery box, a battery device and an electric equipment, and relates to the technical field of batteries. The buffering structure comprises a connecting piece, a first deformation piece, a second deformation piece and a third deformation piece. The connecting piece is used for being connected with a box body or a side beam of the battery box. The second deformation piece is connected between the first deformation piece and the connecting piece. The third deformation piece is connected between the second deformation piece and the connecting piece. The application improves the protection effect of the battery box by arranging the buffering structure, and improves the safety of the battery pack.

The utility model provides a kind of pier protection structure for preventing riverbed egg broken rock impact, including protective steel plate structure, anchoring key structure and energy dissipation structure, protective steel plate structure is used to keep out in pier, and protective steel plate structure is filled with buffer material between and pier, anchoring key structure includes multiple PBL keys and multiple welding ring hoops, multiple vertically spaced reserved holes are set on each PBL key, welding ring hoop is connected on PBL key by penetrating multiple reserved holes spaced along the circumference of the protective steel plate structure, and welding ring hoop is connected to the outer side of vertical main reinforcement of pier, and the structure is better in steel structure protection effect, and the connection form of anchoring key is more stable, can be prefabricated processing in advance, improve construction efficiency, and energy dissipation structure can absorb the impact force of egg broken rock scouring, reduce the impact energy on pier, achieve the purpose of energy dissipation, while buffer material can also buffer the impact on pier, overall protection energy dissipation effect is better.

The invention discloses an edge-leaning anti-collision device and method for a water conservancy survey unmanned ship, and relates to the technical field of water conservancy survey equipment. According to the edge-leaning anti-collision device for the water conservancy survey unmanned ship, the first-stage anti-collision mechanism, the second-stage anti-collision mechanism and the resistance increasing mechanism are arranged, and operation actions of the first-stage anti-collision mechanism, the second-stage anti-collision mechanism and the resistance increasing mechanism are mutually linked, so that when the first-stage anti-collision mechanism collides with a river bank firstly, the edge-leaning anti-collision device plays a role in buffering and anti-collision; the first-stage anti-collision mechanism and the second-stage anti-collision mechanism are arranged, air in the first-stage anti-collision mechanism can be extruded out and distributed into the second-stage anti-collision mechanism and the resistance increasing mechanism within an extremely short time, power is provided for operation of the second-stage anti-collision mechanism and the resistance increasing mechanism, and therefore the second-stage anti-collision mechanism and the resistance increasing mechanism can react within the extremely short time of collision while the first-stage anti-collision mechanism plays an anti-collision role, and the anti-collision effect is achieved. Therefore, on the basis of the anti-collision effect of the first-stage anti-collision mechanism, the effects of secondary anti-collision and reduction of the collision force can be achieved again, and the ship body is protected against collision to the maximum extent.

The invention relates to a protection device of an offshore wind power tower and an installation method, the protection device comprises a wind power tower main body comprising a guide pipe frame and a guide pipe frame platform, the guide pipe frame comprises a plurality of guide pipe frame columns, and the guide pipe frame columns are supported at the bottom of the guide pipe frame platform; the anti-collision guardrail is arranged at the bottom of the jacket platform along the periphery of the jacket, and the anti-collision guardrail and the jacket platform are welded and fixed; the flexible protection system encloses the periphery of the jacket, the upper end of the flexible protection system is connected with the jacket columns, and the lower end of the flexible protection system is suitable for being anchored to the seabed; and the wave isolation self-resetting system is mounted on the jacket platform and is suitable for driving the wind power tower main body to automatically reset after the wind power tower main body vibrates and deviates. The protection device provides omnibearing and multi-layer protection for the wind power tower, and provides powerful guarantee for long-term stable operation of an offshore wind power plant.

The utility model relates to the technical field of fire engineering, and discloses a fire hydrant convenient to connect for fire engineering, which comprises a main body, the bottom of the main body is fixedly connected with a base, the outer side of the main body is provided with two groups of connectors, and one end of each connector is provided with a water pipe. The fixing rod enters the inner side of the limiting groove, the shell and the connecting block form a fixed connection state, the water pipe is fixed accordingly, connection with the fire hydrant is completed, the overall connection steps are simple, the water pipe can be rapidly installed on the fire hydrant, more fire fighting time is won for workers, and the use convenience of the fire hydrant is improved; according to the fire hydrant, collision objects are blocked through the first protection plate and the second protection plate, and the buffer blocks can reduce impact energy generated by collision, so that the damage probability of the fire hydrant is reduced, and meanwhile, the use cost of the fire hydrant is reduced.

The present invention discloses a local flexible bottom structure that absorbs and reduces impact energy by flexible deformation, including a flexible outer plate of the bottom, a flexible support, and an inner bottom plate; the outer plate of the bottom is a composite material outer plate that can withstand a certain intensity of water impact pressure and is arranged at the hydrodynamic stagnation point of the bottom; the hull should be folded inward according to the installation height of the flexible structure to form an inner bottom plate that is a continuous structure with the bottom plate; between the flexible outer plate and the inner bottom plate, a flexible support is arranged according to the distribution of the hull ribs, and the material is rubber or spring, which plays a damping and buffering role, and a rigid support is used near the stern, and free support is used in the other three circles. Under no-load conditions, the lower surface of the flexible outer plate of the bottom completely overlaps with the lower surface of the bottom plate. The device can isolate the impact acceleration from being directly transmitted to the boat, and improve the hydrodynamic performance of the planing boat by using the step-down effect generated by the passive deformation of the flexible structure.

The utility model belongs to displacement platform technical field especially relates to a high clean vacuum displacement platform, including base, the both ends fixed mounting of base have bearing seat, be equipped with slide rail on base, the movable installation of slide rail has displacement platform, be equipped with buffer mechanism in displacement platform. This high clean vacuum displacement platform, in precision and stability, through the linkage design of spring and damper, makes the vertical direction self -adaptation adjustment of gyro wheel frame can be realized with load weight, and the buffer gap cooperation damper of buffer groove and slide rail limiting edge attenuates the outside vibration impact energy in short time, compared with traditional rigid structure, the precision and stability are improved obviously, in clean and durability, the contact surface of slide rail and sliding block is coated with molybdenum disulfide self -lubricating wear -resisting coating, reduces the friction coefficient and reduces the generation of debris, prolongs the service life of displacement component, and the coating does not volatilize, does not absorb the impurity in vacuum environment, can steadily play lubricating effect, satisfies the use demand of high clean vacuum environment.

The utility model provides an automobile door assembly and an automobile. The automobile door assembly comprises an automobile door inner plate, an anti-collision rod and a supporting beam. The anti-collision rod is arranged on the vehicle door inner plate in the front-back direction of a vehicle. The supporting beam is arranged on the vehicle door inner plate in the vertical direction of a vehicle. The rear end of the anti-collision rod is connected with the supporting beam. According to the utility model, the rear end of the anti-collision rod is connected with the supporting beam, specifically, the rear end of the anti-collision rod can be connected with the supporting beam through a connecting piece or large-area lap joint; in this way, force on the anti-collision rod can be transmitted to the supporting beam, and force transmission is counteracted through the supporting beam; the supporting beam is generally made of high-strength materials, the strength of the rear portion of the automobile door assembly can be well enhanced, energy of an anti-collision rod is evenly decomposed to other places, the rigidity of the rear portion of the automobile door is enhanced, deformation is concentrated on the front portion of the automobile door, impact energy of the rear portion is reduced, and the invasion speed in the automobile can be reduced.

The present invention discloses a drone with multiple protective devices and a control method thereof, and belongs to the technical field of drones. The drone with multiple protective devices includes multiple buffer energy absorption devices, airbag devices and parachute devices. Each connection between a rotor and a fuselage is provided with a buffer energy absorption device. A plurality of buffer energy absorption hollow structures are provided in the buffer energy absorption device. The two ends of the buffer energy absorption device are respectively connected to the rotor and the fuselage. The buffer energy absorption device is configured to deform first when the drone is impacted. The airbag device includes at least one airbag and an inflatable structure. The inflatable structure is configured to inflate the airbag so that the airbag expands and wraps the mission equipment of the drone. The parachute device includes at least one parachute bag and an opening structure. The opening structure is configured as an ejection parachute bag. The present invention adopts a triple protective device of a parachute device, an airbag device and a buffer energy absorption device to provide multi-stage and multi-faceted protection for the drone, and has high safety.

The utility model discloses a touch type industrial personal computer with a protection function. The touch type industrial personal computer comprises a shell and an industrial personal computer host. Through the arrangement of the movable plate, the first spring, the magnet and the clamping mechanism, the movable frame can be positioned through clamping of clamping teeth and clamping grooves on the clamping mechanism during use, the protection operation of the industrial personal computer host is achieved, and once the transparent plate is impacted, the transparent plate is prevented from being damaged. At the moment, a movable frame drives a movable plate to move in a movable groove, the movable plate is driven to compress a first spring under the action of impact force, and the impact force can be effectively absorbed and converted by utilizing mutual repulsion between magnets, so that the possibility that the transparent plate for protection is damaged is effectively reduced; and impact energy acting on the industrial personal computer host can be effectively reduced, and the protection effect on the industrial personal computer host is effectively improved. The utility model has the advantages of convenient to use and good protection effect.

The present invention provides a lightweight battery box with anti-corrosion function, belonging to the technical field of battery boxes. It includes an installation box, a battery pack is installed at the bottom of the inner wall of the installation box, and a fireproof board is installed on the upper part of the inner wall of the installation box. The present invention promotes the airbag to continuously expand and contact the slotted inner wall through gas conversion between the gas storage chamber and the airbag, forming a sealing effect between the installation box and the sealing plate, greatly preventing water vapor or rainwater from flowing into the battery box from the gap, and avoiding the problem that some corrosive liquids such as rainwater contact the battery pack and cause the circuit inside the battery box to be corroded. At the same time, a protective component is set to absorb and disperse the energy impact on the surface of the protective cover, ensuring the structural strength while greatly reducing the overall weight. Through the specially designed prefabricated fracture groove and variable-oriented corrugated tube, the anti-collision performance and wading water drainage are good, while achieving the effect of improving the lightweight of the battery box.

The application relates to the technical field of automobile interiors, and particularly discloses a TPO material with low odor and low impact energy and a preparation method thereof. The TPO material with low odor and low impact energy comprises, from bottom to top, a back coating layer, a polypropylene foaming layer, a TPO layer and a surface coating layer; according to mass percentage, the raw materials of the TPO layer comprise 40-55% of EPDM particles, 10-20% of modified TPO particles, 20-30% of polypropylene, 0-5% of an additive and 4-15% of pigments. The TPO material with low odor and low impact energy can be used for preparing a dashboard protective mask of an automobile interior, has the advantages of low impact energy, low odor, aesthetic appearance and comfort, and can meet the burst requirements of different special-structure airbags.

The invention provides a lightweight battery box body with an anti-corrosion function, and belongs to the technical field of battery box bodies. Comprising a mounting box body, a battery pack is mounted at the bottom of the inner wall of the mounting box body, and a fireproof plate is mounted on the upper portion of the inner wall of the mounting box body. According to the battery box, water vapor or rainwater is greatly prevented from flowing into the battery box body from gaps, the problem that lines in the battery box are corroded after corrosive liquid such as rainwater is in contact with a battery pack is solved, meanwhile, the protection assembly is arranged, energy impact on the surface of the protection cover is absorbed and dispersed, and the service life of the battery box is prolonged. The overall weight is greatly reduced while the structural strength is guaranteed, and the effect of improving the light weight of the battery box body is achieved while the anti-collision performance and the water drainage performance in wading are good by specially designing the prefabricated fracture grooves and the corrugated pipes with variable directions.

The utility model discloses a light composite bulletproof structure, and relates to the field of bulletproof composite structures. The utility model comprises a fiber layer, a carbon fiber toughened ceramic layer, a fiber composite material layer, a metal layer and a three-dimensional woven negative Poisson's ratio fiber high-pressure air chamber layer which are sequentially bonded with one another, wherein at least one part of air chamber in the three-dimensional woven negative Poisson's ratio fiber high-pressure air chamber layer is filled with air. A three-dimensional woven negative Poisson's ratio fiber high-pressure air chamber layer arranged at the lowermost part is formed by arranging three-dimensional woven negative Poisson's ratio fiber high-pressure air chamber units in a staggered manner, and the three-dimensional woven negative Poisson's ratio fiber high-pressure air chamber units are filled with gas; after the projectile intrudes into the layer, the negative Poisson's ratio structure of the layer can consume the residual energy of the projectile through the self auxetic effect, the filled gas can increase the motion resistance of the projectile, and the weight of the structure can be reduced.

The invention relates to the technical field of vehicle projection, in particular to a vehicle projection curtain device, a control method and a vehicle thereof. A vehicle projection curtain device comprises a box body, a reel pipe, a curtain and a clutch, the reel pipe is installed in the box body, and the curtain is wound in the reel pipe; the clutch comprises a brake disc, a base, a friction disc, an elastic piece and an electromagnet, the brake disc is fixed to the reel pipe, the base is installed on the box body, the friction disc is provided with a friction end and a matching end which are oppositely arranged in the axis direction of the reel pipe, the friction end is used for being matched with the brake disc, and the matching end is arranged to be a magnetic end and used for being matched with the electromagnet; one end of the elastic piece is limited to the friction end, and the other end of the elastic piece is limited to the base. The control method is realized based on the vehicle projection curtain device. A vehicle includes a vehicle projection curtain device. According to the clutch, the starting and stopping noise of the clutch can be reduced, and the vehicle using experience is effectively improved.

The present invention relates to the field of packaging technology, and specifically provides a packaging base, which aims to solve the problem that the existing packaging base is difficult to satisfy both the requirement of stably supporting an air conditioner and buffering the impact force received by the air conditioner. To this end, the packaging base of the present invention includes a seat body arranged at the bottom of the air conditioner, a supporting member arranged on the seat body, and a collapse structure arranged on the supporting member, and the collapse structure is used to absorb the impact energy received by the air conditioner in a collapsed manner. The present invention can well support the air conditioner by means of the supporting member arranged on the seat body, and can buffer the impact force received by the air conditioner in a deformed manner, thereby avoiding the shaking of the air conditioner due to the impact force, so that the air conditioner can stand stably on the seat body; the collapse structure arranged on the supporting member can selectively collapse according to the size of the impact force received by the air conditioner, thereby absorbing the impact energy received by the air conditioner, thereby avoiding damage to the air conditioner.

An electric power-assisted brake system capable of improving NVH performance comprises a flange plate, and the flange plate is provided with a connecting column with a through hole; the first piston is movably arranged in the through hole of the flange plate in a penetrating mode in the axial direction, and the first piston comprises a first end and a second end which are oppositely arranged; the push rod is contained in a cavity formed in the first end of the first piston; one end of the first spring abuts against the end face of the second end of the first piston, and the other end of the first spring is coupled to a vehicle body; and the anti-rotation ring is fixed to the first end of the first piston in a sleeving mode and can move in the axial direction along with the first piston, the anti-rotation ring is connected with the flange plate in an anti-rotation mode, and a rubber layer is arranged on the end face, close to the flange plate, of the anti-rotation ring. According to the system, the impact sound between the piston and the flange plate in the brake system can be reduced at lower cost. The utility model further discloses a vehicle.

The utility model relates to an operating mechanism suitable for a vacuum circuit breaker, which is provided with an operating mechanism and a buffer oil cylinder, a non-driving side of a driving shaft of the operating mechanism extends out of the operating mechanism and is used as a piston rod of the buffer oil cylinder, and a piston of the buffer oil cylinder is fixedly arranged on the driving shaft in a cylinder body of the buffer oil cylinder. The inner wall of a cylinder body of the buffering oil cylinder is provided with one or more overflowing groove operation mechanisms extending in the axial direction, one-way channels are arranged between overflowing grooves and cavities on the two sides, the operation mechanisms are permanent magnet operation mechanisms, permanent magnets of the operation mechanisms are annular permanent magnets magnetized in the radial direction and are provided with magnet yoke assemblies, the number of magnet exciting coils of a movable iron core is two, and the number of the magnet exciting coils of the movable iron core is two. The two magnets are located on the two axial sides of the permanent magnet. According to the utility model, the internal magnetic field distribution is reasonable, an opening spring is not needed, opening and closing bounce can be effectively avoided, a good opening and closing speed is maintained, and the operation requirements of a circuit breaker and the like are better met.

The application provides a battery monomer, a battery device and an electric equipment. The battery monomer comprises a shell and one or more electrode assemblies. The electrode assemblies are accommodated in the shell. The electrode assemblies comprise pole pieces and separators arranged between the pole pieces. The separators comprise first separators and second separators. The electrode assemblies comprise first regions and second regions. The second regions are arranged close to the shell relative to the first regions. The first separators are located in the first regions. The second separators are located in the second regions. The adhesion of the first separators to the pole pieces is F1. The adhesion of the second separators to the pole pieces is F2. F1>F2, and F2 is less than or equal to 10 N / m. The second separators have lower adhesion. When the battery is subjected to external force impact, the second separators and the pole pieces can dissipate impact energy through sliding, thereby reducing the risk of pole piece cracking, piercing the separators and causing short circuit.

The invention discloses a semi-self-grinding feeding trolley lining plate and a manufacturing method thereof.The lining plate comprises a plate-shaped base body made of an iron-based nickel-molybdenum alloy material and a plurality of rod-shaped inlay bodies made of a metal ceramic material, and the rod-shaped inlay bodies are embedded in the plate-shaped base body at intervals; and the upper ends of the plurality of rod-shaped inlay bodies protrude out of the plate-shaped base body. When the rod-shaped inlay made of the metal ceramic material is prepared, Fe is used as an adhesive, a ceramic preform is pressed firstly, then vacuum sintering is performed, the obtained rod-shaped inlay is small in ceramic particle size and uniform in distribution, and the ceramic and Fe interface is clean, free of pollution and tight in combination. According to the lining plate, the rod-shaped inlay bodies which are distributed in a latticed mode and made of the metal ceramic material are embedded in the plate-shaped base body made of the iron-based nickel-molybdenum alloy material, and the impact force on the lining plate during ore blanking can be dispersed.

The utility model provides an adjustable lubricating oil filling device, and belongs to the technical field of lubricating oil filling. Comprising a base and an oil storage tank, a filling assembly and a sealing set are arranged at the top of the base, the filling assembly comprises a long material conveying pipe and a lifting adjusting mechanism, the tail end of the long material conveying pipe extends to the position above the liquid level of an oil storage barrel, and the long material conveying pipe is communicated with a metering pump at the top of the oil storage tank; a lifting block is arranged in the sliding groove, the long conveying pipe is fixed to one end of the lifting block, an output shaft of the motor is connected with a threaded rod, the sealing assembly comprises a sealing plate and balancing weights, the sealing plate is slidably mounted on one side of the mounting plate, the balancing weights are symmetrically fixed to the top of the sealing plate, and a through hole is formed in the sealing plate. The long material conveying pipe is close to the bottom of the oil storage barrel, so that bubbles of lubricating oil caused by air entering can be prevented to a certain extent, the quality of canned lubricating oil is guaranteed, the filling quality of the lubricating oil is effectively improved, and the influence on subsequent use of the lubricating oil is reduced.

The invention discloses an electronic device which comprises a frame body, an elastic supporting piece, a panel, a cover plate and a colloid, the elastic supporting piece is arranged on the frame body, a part of the elastic supporting piece is located between the panel and the frame body, and the cover plate is located on the side, away from the elastic supporting piece, of the panel. The colloid is arranged on the elastic supporting piece, and a part of the colloid is located between the edge of the cover plate and the elastic supporting piece.

The utility model discloses a plastic pallet with an anti-collision structure, which is applied to the field of plastic pallets, and is characterized in that when the impact force is small, an anti-collision plate buffers the impact force under the action of a damper and a first spring, the impact energy is weakened, the stability of the pallet is ensured, and when the pallet is subjected to large impact, a stop block is in contact with the pallet, so that the impact energy is reduced. A second spring buffers and absorbs energy again for the impact force, supports the anti-collision plate, prevents the anti-collision plate from deforming, prolongs the service life, and accordingly achieves the purpose of good anti-collision effect, a pressing rod is moved to enable a pull rod to drive a sliding rod to move, the sliding rod moves to drive a clamping rod to move, the clamping rod is separated from a clamping hole, then the anti-collision plate is taken down, and the anti-collision effect is good. A new anti-collision plate is installed in a buffer rod, a sliding rod drives a clamping rod to be clamped with a clamping hole under the action of a third spring, the anti-collision plate is fixed, replacement is completed, and therefore the purpose of conveniently replacing the anti-collision plate is achieved, the workload is reduced, and the replacement efficiency is improved.

The invention belongs to the technical field of nitrogen making equipment, and particularly relates to a zero-gas-consumption PSA nitrogen making device which comprises a fixing frame, the upper portion of the fixing frame is fixedly connected with a purification part, and the purification part can compress, filter and purify input air so as to remove impurities in the air; the purification part is connected with an adsorption part, and the adsorption part can filter the pumped air, so that oxygen, carbon dioxide and moisture in the air are adsorbed, and nitrogen is left; the adsorption part is connected with a buffer part, and the buffer part can collect nitrogen generated by the adsorption part; the adsorption part comprises at least two reaction tanks, the reaction tanks are connected through a pipeline with a valve, and the lower ends of the reaction tanks are fixedly connected with the fixing frame. According to the invention, by optimizing the adsorption circulation and desorption processes, the nitrogen flowing in the system is utilized for regeneration, and the situation that additional nitrogen or other gases are needed for regeneration in the traditional PSA system is avoided, so that zero gas consumption is realized.