115results about How to "Shock mitigation" patented technology

The invention discloses an air-tight seal integral swash plate check valve, and relates to the technical field of fluid valves. The problems that a traditional check valve is poor in sealing performance, short in service life, low in operation flexibility and the like are solved. By introducing a retarding reset spring and a buffering lead screw, the damage of impact force to the valve clack is obviously reduced; the pneumatic pump provides a positive pressure environment to improve the sealing effect; flexible switching of flow paths is achieved through the three-way switching design; and meanwhile, automatic and manual operation is supported. The air pressure in the pressure maintaining shell is monitored in real time, and the system safety is ensured. The valve is reasonable in structure, rich in function and suitable for efficient fluid conveying and control under complex working conditions.

The utility model discloses a cable structure with an anti-impact sheath, which relates to the technical field of cable sheaths and comprises an upper corrugated plate and a lower corrugated plate, a deformation sleeve is sleeved in the two corrugated plates, a plurality of buffer grooves are equidistantly arranged on the inner wall of the deformation sleeve along the length direction, a plurality of connecting holes are equidistantly arranged on the inner wall of the deformation sleeve, and the buffer grooves are connected with the connecting holes. A cavity is further formed in the inner wall of the deformation sleeve on the outer side of the connecting hole, a stop block is installed in the cavity, a spring is arranged in the cavity at the inner end of the stop block, and the outer end of the stop block extends out of the interior of the connecting hole; according to the utility model, the corrugated plate is used for fixing the deformation sleeve to play a preliminary anti-impact role, the buffer groove is used for buffering the impact force borne by the deformation sleeve, and the stop block in the deformation sleeve can also play a role in relieving the impact force under the action of the spring, so that the friction between the deformation sleeve and the cable can be increased, and the cable can be prevented from being damaged. And the situation that the sheath slides from the protection position and does not have the protection effect is avoided.

The check ring for the cast iron well lid comprises a check ring body, an inner ring and a center plate, the center plate is welded to the bottom of the check ring body, inner threaded pipes are welded to the top of the center plate at equal intervals, fixing screw rods are arranged in the inner threaded pipes in a penetrating and sleeved mode, the inner ring is welded to the inner side of the check ring body, and an anti-falling net is arranged in the inner ring. Semicircular clamping rings are welded to the inner side, located on the top of the anti-falling net, of the inner ring at equal intervals. The space between the inner ring and the well lid is filled with the semicircular clamping rings, so that the well lid is not prone to shaking and shaking, the impact force generated when the well lid covers the inner ring is relieved through the rubber pad, meanwhile, sealing is conducted between the well lid and the inner ring, and the center plate can be reinforced and not prone to displacement by screwing the fixing screw into a well mouth.

The invention relates to the technical field of oil field development, and discloses a high-temperature and high-pressure resistant oil field underground perforating gun which comprises a gun body assembly, a gun rack pipe assembly is arranged in the gun body assembly, a buffer assembly is fixedly connected to the top end of the gun rack pipe assembly and comprises a base plate, a connecting block is fixedly connected to the upper surface of the base plate, and the connecting block is fixedly connected to the upper surface of the base plate. A bottom plate is fixedly connected to the outer wall of the connecting block, a side plate is fixedly connected to the upper surface of the bottom plate, a top plate is fixedly connected to the upper surface of the side plate, a supporting block is slidably connected to the interior of the top plate, a pressure reducing shaft is fixedly connected to the upper surface of the connecting block, and a first spring is fixedly connected to the top end of the pressure reducing shaft; the top end of the first spring is fixedly connected with a supporting shaft, and the outer wall of the pressure reducing shaft is slidably connected with a sleeve. By relieving the first pressure pulse, the impact force can be reduced, disturbance to the well wall stratum is reduced, and therefore the risks of well leakage and well collapse are reduced, and the continuity and safety of operation are guaranteed.

The utility model provides an underwater storage tank. The underwater storage tank comprises a structural cabin, a flexible storage bag and an oil guide protection cylinder. The flexible storage bag is located in the structural cabin and can deform under the action of external force, the oil guide protection barrel is arranged in the flexible storage bag in a penetrating mode, and an oil inlet pipeline and an oil outlet pipeline are arranged in the oil guide protection barrel. The bottom of the oil guide protection cylinder is through, a plurality of through holes are formed in the side wall of the oil guide protection cylinder, an outlet of the oil inlet pipeline is communicated with an inner cavity of the flexible storage bag through the through holes, and an inlet of the oil outlet pipeline is communicated with the inner cavity of the flexible storage bag through the bottom of the oil guide protection cylinder and the through holes; an inlet of the oil inlet pipeline and an outlet of the oil outlet pipeline are both located outside the structural cabin. A water inlet and a water outlet are formed in the side wall of the structural cabin. The problems of seawater pollution and resource waste easily caused in the prior art are solved.

The utility model provides a hollow glass transportation device with a protection structure, which relates to the technical field of transportation devices and comprises a bottom plate, a rotating wheel is fixedly mounted at the bottom end of the bottom plate, a support rod is mounted at the top end of the bottom plate, a push rod is fixedly mounted at the top end of the support rod, and a base plate is arranged at the top end of the bottom plate. A better using effect is achieved, in the using process, when jolting or shaking occurs, impact force generated by jolting or shaking enables glass to be transmitted to the sliding block through the backup plate and the clamping block, at the moment, the sliding block slides towards the interior of the supporting plate through the sliding groove, and the glass is prevented from falling off. A sliding rod on the left side of the sliding block slides towards the left side in the supporting plate through a sliding groove, and at the moment, a spring can relieve impact force generated by bumping or shaking, so that the problem that an existing conveying device is not provided with a buffering structure is solved; in the using process, when the glass jolts or shakes, the glass is prone to being broken due to jolts or shakes.

An automatic anti-swing device of a crane effectively solves the problem that lifted goods are prone to swing and comprises a main beam, supporting legs and an electric trolley, a winding drum is installed on the electric trolley, a fixing frame is arranged below the electric trolley, the upper end of the fixing frame is rotationally connected with a pulley block, a first steel wire rope is wound around the pulley block, and the other end of the first steel wire rope is wound around the winding drum. Auxiliary mechanisms are arranged on the front side and the rear side of the fixing frame and comprise first fixed pulleys, second fixed pulleys, third fixed pulleys and second steel wire ropes, the first fixed pulleys and the third fixed pulleys are located on the lower portion of the fixing frame, and the second fixed pulleys are located on the upper portion of the fixing frame. The second steel wire rope sequentially penetrates through the first fixed pulley, the second fixed pulley and the third fixed pulley, supporting plates are fixed to the left end and the right end of the second steel wire rope, rings are fixed to the sides, away from the second steel wire rope, of the supporting plates, vertical guide rods are fixed to the supporting legs, and the rings vertically slide along the guide rods.

The utility model provides a traction device and a bundling machine. The traction device comprises a traction input shaft, a hitching plate assembly, a front traction connecting frame welding part, a traction middle shaft, a rear traction connecting frame welding part, a traction output shaft, a pair of traction beams and a limiting mechanism, the traction input shaft is connected with the traction middle shaft, the traction middle shaft is connected with the traction output shaft, and the traction output shaft is connected with the hitching plate assembly. The hitching plate assembly is installed on the front traction connecting frame welding part, the front traction connecting frame welding part is rotationally connected with the rear traction connecting frame welding part, and the traction middle shaft is rotationally installed in the front traction connecting frame welding part and the rear traction connecting frame welding part. The pair of traction beams is connected with the rear traction connecting frame welding part, and the limiting mechanism is installed at the connecting position of the front traction connecting frame welding part and the rear traction connecting frame welding part.

The invention relates to the technical field of offshore photovoltaic power generation, and discloses an offshore floating type photovoltaic supporting structure system which comprises a main floating pipe capable of providing main buoyancy support for the whole and providing enough buoyancy in seawater, so that the whole photovoltaic system floats on the sea surface; the auxiliary floating pipe, the main floating pipe and the auxiliary floating pipe are connected with the three-dimensional truss to maintain the overall shape and rigidity of the system, extra buoyancy is increased by the auxiliary floating pipe, the stability of the system under various ocean conditions is ensured, the buoyancy load of the system is dispersed through cooperation of the main floating pipe and the auxiliary floating pipe, local stress concentration is reduced, and the service life of the system is prolonged. The buoyancy of seawater and the action of waves should be considered in the design of the floating pipes, it is ensured that the system stably floats on the sea surface through reasonable layout and design, and it is ensured that the system can still keep stable under the action of strong stormy waves through the high-strength and rigid design of the three-dimensional trusses and the auxiliary trusses; and the stability and safety of the whole structure are kept.

The utility model relates to the technical field of plane rotary screen, especially a plane rotary cleaning screen screen device with self-cleaning brush, which comprises a screening and flow changing frame, the left side of the screening and flow changing frame is fixedly connected with an upper plane rotary screen plate and a lower plane rotary screen plate, the top of the upper plane rotary screen plate is fixedly connected with a stable guard frame, the top of the stable guard frame is connected with a locking assembly, the surface of the locking assembly is connected with an upper guard plate, the bottom of the right side of the upper guard plate is fixedly connected with an adjusting frame, a driving motor is fixedly installed on the inner wall of the adjusting frame, the output end of the driving motor is fixedly connected with a threaded rotating rod, the utility model can filter and screen materials by using the stepped screen plate and screen holes, and the driving control moving brush plate is used to comb materials and clean impurities, so that the multiple screening and self-cleaning effect in the process of screening materials by the plane rotary screen is realized.

The M-shaped telescopic buffering anti-collision guardrail comprises a base, a first supporting rod is fixedly connected to the upper surface of the base, a mounting groove is formed in one side of the first supporting rod, a telescopic handrail is arranged in the mounting groove, the other end of the telescopic handrail is fixedly connected with a second supporting rod, and the second supporting rod is fixedly connected with the first supporting rod. Buffer structures are fixedly connected to the front faces of the first supporting rod and the second supporting rod, an anti-collision plate is fixedly connected to the front faces of the buffer structures, sleeve rods are fixedly connected to the two sides of the anti-collision plate, and connecting rods are movably connected to the interiors of the sleeve rods. The telescopic handrail and the reinforcing rods are arranged, the distance between the first supporting rod and the second supporting rod is changed by unfolding the telescopic handrail, the length of the handrail can be adjusted when the device is installed, the device is suitable for different construction sites, impact force borne by the handrail can be effectively relieved through the device by arranging the buffering structure and the anti-collision plate, and the safety of the device is improved. And the safety of the device is improved.

The utility model relates to the technical field of composite screen cloth, and discloses high-breathability composite screen cloth which comprises a skin-friendly layer, a sweat absorption layer, a screen cloth layer, a supporting layer, an elastic layer, a breathable layer and a wear-resistant layer which are sequentially arranged from bottom to top. The supporting layer is provided with a plurality of uniformly distributed supporting blocks; a plurality of supporting columns are arranged on the supporting layer at intervals; the supporting column penetrates through the elastic layer, and the two ends of the supporting column abut against the breathable layer and the screen cloth layer respectively; the supporting column is provided with a transverse air channel, the supporting column is further provided with a plurality of vertical air channels vertically communicated with the transverse air channel, the vertical air channels penetrate through the two ends of the top and the two ends of the bottom of the supporting column, through holes are formed in the positions, corresponding to the supporting column, of the skin-friendly layer, and air holes are formed in the positions, corresponding to the supporting column, of the wear-resisting layer. The breathable antibacterial fabric is good in breathability and has antibacterial performance.

The utility model relates to the field of guide device processing, in particular to an induction type identification guide device for a commercial integrated building, and solves the technical problems that in the prior art, a guide display screen of a guide device is generally mounted through a mounting frame, and the display screen cannot be effectively and directly protected; when a pedestrian accidentally collides with a display screen, the display screen is damaged, the maintenance cost is high, a machine is overheated due to long-time use of the display screen, and the service life of the machine is shortened. Comprising a main body bottom plate, a display assembly, a buffer assembly, a protection assembly, an indication assembly, a placement assembly and a heat dissipation assembly, compared with a traditional guide device, the guide device can effectively relieve impact force generated when pedestrians impact a display screen by arranging a protection structure and a buffer structure, so that the maintenance cost of the guide display screen can be reduced, and the service life of the guide display screen is prolonged. By arranging the heat dissipation device for heat dissipation, the service life of the machine is prolonged.

The present invention is a material receiving buffer frame device for preventing the belt conveyor from being penetrated, which is arranged between the steel trusses of the belt conveyor and located at the material receiving place of the belt conveyor at the material discharge port of the crusher. The material receiving buffer frame device includes a buffer roller assembly, a steel frame and a buffer member; the steel frame is composed of an upper steel frame and a lower steel frame, the upper steel frame is connected to the lower steel frame through a buffer member, and the lower steel frame is fixedly connected to the steel trusses of the belt conveyor on both sides; the buffer roller assembly is arranged on the upper steel frame, and the buffer roller assembly is composed of a plurality of main rollers and roller brackets, and a plurality of main rollers are arranged on the upper steel frame in parallel and horizontally rotatable through the roller brackets. The present invention can effectively solve the impact of large-size raw materials on the belt, and on the basis of safety and practicality, effectively improve the service life of the belt conveyor, reduce the replacement frequency of the belt conveyor, save operating costs, and generate better social and economic benefits.

The invention discloses a multiple buffering anti-impact noise reduction structure for icebreaker bulkheads, comprising two sandwich panels for noise reduction and an anti-impact structure arranged between the two sandwich panels; the anti-impact structure comprises a load-bearing curved plate, a first buffering and resetting structure, a load-bearing buffering support structure, a second buffering and resetting structure and a load-bearing base, the load-bearing and buffering support structure comprises a buffering connecting plate, a compression sleeve connected to the load-bearing panel is arranged at the upper end of the buffering connecting plate, a guide column is arranged at the lower end, and a resetting elastic element connected to the lower sandwich panel is arranged on the guide column; the two ends of the first buffering and resetting structure are respectively pivotally connected to the load-bearing panel and the buffering connecting plate, and the two ends of the second buffering and resetting structure are respectively pivotally connected to the buffering connecting plate and the load-bearing base. The structure can accept the impact force from the outside in a large area and in multiple directions while reducing noise, and effectively alleviate the impact force through multiple shock-absorbing and buffering protective barriers; the structure is reasonable and easy to manufacture, install and maintain.

The utility model relates to the technical field of water pumps, and discloses a water pump valve convenient to control flow, which comprises a valve body and a valve cover, one side of the valve body is connected with a water inlet, a water inlet buffer area is arranged close to the water inlet, the other side of the valve body is connected with a water outlet, and a water outlet buffer area is arranged close to the water outlet. A sealing structure is connected between the water inlet buffer area and the water outlet buffer area, the valve cover is connected to the upper surface of the valve body through a bolt, a quantitative lifting structure connected with the sealing structure is connected to the upper surface of the valve body, flow velocity sensors are arranged in the water inlet buffer area and the water outlet buffer area, and a buffer concave area is arranged on one side in the water outlet buffer area. And the other side is connected with a buffer bulge. The utility model has the advantages that the buffering effect in the valve body is good, and the water hammer effect can be reduced.

The utility model discloses a fuel filter which comprises a fuel filter shell, an aluminum filter screen cover is arranged in the fuel filter shell, a supporting seat is arranged at the bottom of the aluminum filter screen cover, a pressure relief spring is arranged in the center of the upper portion of the supporting seat, a fuel filter element is arranged in the aluminum filter screen cover, and the fuel filter element is arranged in the aluminum filter screen cover. A filter element installation opening is formed in the top of the fuel filter shell, an inner sealing cover is arranged inside the filter element installation opening, an outer sealing cover is arranged outside the filter element installation opening, an oil inlet is formed in the center of the top of the outer sealing cover, and an oil outlet is formed in the center of the bottom of the fuel filter shell. The detachable fuel oil filter is composed of the fuel oil filter shell and the fuel oil filter element, the fuel oil filter element is of a detachable structure, when the fuel oil filter element inside breaks down, only the fuel oil filter element needs to be replaced, the shell does not need to be replaced, and therefore cost expenditure is saved.

The utility model provides a reinforced and stable surfboard tail fin, and belongs to the technical field of surfboard tail fins. The tail fin comprises a base plate used for being fixed to a surfboard and a tail fin body arranged on the base plate, a T-shaped groove is formed in the middle of the base plate, a base is fixed to the bottom of the tail fin body, the tail fin body is embedded into the middle of the T-shaped groove in a sliding mode, and a limiting piece is horizontally inserted into the middle of the interior of the T-shaped groove in a penetrating mode. Two limiting battens are arranged on the limiting piece and located on the two sides of the base correspondingly to form limiting. A buffer fin is inserted in the middle of one side of the tail fin body, a spring is installed on the side, inserted into the tail fin body, of the buffer fin, and the spring is connected with the interior of the tail fin body. The utility model not only is convenient to disassemble, assemble and replace, but also has a certain buffering and unloading effect, can effectively improve the stability during use by being matched with the reinforcing seat, and has a good overall use effect.

The utility model discloses a wind-solar complementary power supply device with a waterproof structure. The wind-solar complementary power supply device comprises a waterproof mechanism, an inverter and a storage battery pack, a buffer mechanism and a radiator mounted on one side of the buffer mechanism are arranged below the waterproof mechanism; the waterproof mechanism comprises a base, grooves are formed in the left side and the right side of the top of the base, a roller shaft is rotationally connected to one side of the interior of each groove, and one end of each roller shaft penetrates through the base and is fixedly connected with a wheel disc; a gear is fixedly connected to the end, away from the wheel disc, of the roller shaft, a rack is connected to one side of the gear in a meshed mode, and the outer side of the rack is slidably connected with the base. The end, away from the gear, of the rack is connected with an L-shaped block in a meshed mode, and the waterproof mechanism is arranged, so that waterproof protection can be conducted on the inverter and the storage battery pack, and meanwhile devices in the waterproof cover can be conveniently overhauled.

This utility model relates to the field of molding die technology and discloses a precision positioning secondary molding die, including a base. A first positioning mechanism is provided on the top of the base, and a second positioning mechanism is provided on the rear side of the base. Limiting posts are fixedly connected to the left and right sides of the top of the base. A lower die is inserted into the top of the base, and connecting blocks are fixedly connected to the left and right sides of the lower die. Pins are inserted into the connecting blocks. In use, when the rectangular steel plate after punching needs to be further processed for secondary molding through the first positioning mechanism, the first hydraulic cylinder drives the moving table and the upper die to move down precisely. The limiting sleeve slides along the limiting post and cooperates with the limiting shaft to limit the connection between the moving table and the upper die, ensuring that the alignment error between the upper die and the lower die is minimal. The second hydraulic cylinder pushes the limiting plate to contact the workpiece on the top of the lower die, limiting the displacement of the workpiece from the front and back direction. The cooperation of the pins and the fixed shaft securely installs the lower die on the base.

The utility model relates to the technical field of flange forging dies, in particular to a flange forging die which comprises a lower die base, the bottom of the lower die base is fixedly connected with a fixed base, a buffer base is fixedly installed at the bottom of the lower die base, a base is fixedly installed at the bottom of the buffer base, and four installation blocks are fixedly installed at the top of the lower die base. Fixing grooves are formed in the two sides of the outer surface of the buffer seat, fixing rods are slidably mounted on the inner surfaces of the fixing grooves, the bottom of the buffer seat is slidably connected with a buffer groove, and a buffer spring is fixedly mounted on the inner top wall of the buffer groove. According to the flange forging die, due to the arrangement of the mounting blocks, the fixing rods and the fixing grooves, when the flange forging die is used, the fixing rods penetrate through the corresponding fixing grooves, the lower die base is fixed through the fixing rods, the lower die base is convenient to replace, and therefore the effects that the device is more convenient to adjust and replace and the operation is more convenient are achieved when the flange forging die is used.

This invention belongs to the field of integrated circuit equipment technology and discloses a high-damping vibration-damping base for integrated circuits, including a lower base. The integrated circuit equipment is placed inside the upper base and is centered and clamped by four first flexible square rings in the clamping assembly. When the integrated circuit equipment is used and subjected to vibration during operation, the upper base vibrates. The force on the upper base is transmitted to the second block, the second spherical rod, the elastic damper, the first spherical rod, and the first block, causing the elastic damper to extend and retract, thus mitigating the impact force generated during vibration. Since the multiple second spherical rods and the first spherical rods can move in a circular motion around the second block and the first block, when the integrated circuit equipment vibrates irregularly, the impact force generated in multiple directions of movement of the integrated circuit equipment can be mitigated, reducing the vibration frequency of the upper base relative to the lower base.

The invention provides underwater component detection equipment for roads and bridges in civil engineering and a use method, and belongs to the technical field of road and bridge detection. Comprising a diving seat and a moving mechanism, a detection mechanism used for adjustment and detection is arranged in the middle of the lower portion of the diving seat, and the moving mechanism used for flexible displacement is arranged in the middle of the inner side of the diving seat. According to the invention, through cooperation of all parts of the moving mechanism, range movement detection can be carried out, and the rotation angle of the device during movement can be more flexible and accurate, so that when the device carries out detection in a complex underwater environment, the moving direction can be rapidly, stably and accurately adjusted, and the detection accuracy is improved. Therefore, the device can carry out rapid action detection on the part of the component, the maneuvering time of underwater range activity of the device is reduced, the working time is greatly shortened, and the detection effect is improved.

This invention relates to a counterweight attitude adjustment device, an aircraft attitude control system, and a control method thereof, comprising a track module, a counterweight slider module, a motor drive module, a battery module, a limiting structure, and a guide rail. The counterweight slider module can slide at high speed within the track, releasing angular kinetic energy by impacting the limiting structures at both ends of the track to correct aircraft attitude deviations. The motor drive module is powered by the battery, supporting energy recovery during the sliding process to form a closed-loop power supply system. The counterweight slider module is slidably connected to the guide rail to suppress deflection and maintain sliding stability. The limiting structure employs a combination of buffer and energy-absorbing structures to ensure efficient energy transfer and prevent structural fatigue. This invention further proposes a formula combining the attitude deviation angle and the aircraft's rotational inertia to solve for the impact velocity, achieving precise control of the attitude adjustment force. The proposed solution has advantages such as compact structure, rapid response, and strong modular versatility, and is suitable for active stabilization control of high-dynamic flight platforms such as rockets and spacecraft.

The utility model discloses an adjustable metal tube processing device, which belongs to the technical field of metal tube processing, and comprises a workbench, a moving assembly is arranged in the workbench, a limiting assembly is arranged between the moving assembly and the workbench, the moving assembly comprises a first rectangular groove and a second rectangular groove, and the first rectangular groove and the second rectangular groove are arranged in the workbench. The second rectangular groove is located on the opposite side of the first rectangular groove, a servo motor is detachably connected to one side of the workbench through a cross screw, a lead screw is fixedly installed at the output end of the servo motor through a coupler, and the lead screw is installed in the first rectangular groove through a bearing. And the interior of the second rectangular groove is fixedly connected with a guide rod. Through cooperation of a servo motor, a lead screw and a guide rod, accurate movement of the movable plate is achieved, the positioning accuracy of a metal pipe in the machining process is ensured, the angle of the clamp is adjustable through the design of a rotating part and an adjusting screw, different machining requirements can be met, and the applicability of the device is remarkably improved.

The utility model provides a printer sharing device, which relates to the technical field of printer sharing devices and comprises a sharing device body, a switch is fixedly mounted at the top end of the sharing device body, an interface is arranged on the left side of the sharing device body, a fixing plate is fixedly mounted on the left side of the sharing device body, and a mounting groove is formed in the fixing plate. A better using effect is achieved, after using is completed, the mounting plate can be pinched, corresponds to the upper mounting groove and is pressed downwards, the mounting plate slides downwards at the top end of the fixing plate through the mounting groove, the mounting plate can slide into the fixing plate completely, at the moment, the mounting plate can be firmly clamped into the fixing plate through the upper soft cushion and the lower soft cushion, and the mounting plate is prevented from being damaged. And the dustproof plate completely covers the interface, so that the situation that the interface cannot be continuously used due to the fact that dust in external air floats into the interface and is accumulated in the long-time use process due to the fact that an existing printer sharing device is not provided with an interface dustproof structure is avoided.

The utility model relates to the technical field of reservoir dam protection, disclose a reservoir dam flood control reinforcing structure, including mounting panel, two -stage shock -absorbing buffer structure, movable plate, primary shock -absorbing buffer structure and hit cover shell, the hit cover shell is the square tube structure of one end closed, and the arc plate is formed to the closed end, and the movable plate is movably matched and is arranged in the hit cover shell, and with the arc plate between the hit cover shell is connected through primary shock -absorbing buffer structure. Compared with prior art, the advantage lies in: the hit cover shell directly meets the water wave, thereby effectively preventing the water wave from directly attacking the reservoir dam, after the hit cover shell is impacted by the water wave, the arc plate of the hit cover shell can change the direction of the water wave, so as to relieve the impact of the water wave, and then the rubber air bag can exert the damping effect, and the damping spring telescopic rod and spring steel sheet can further provide the damping effect, thereby exerting effective damping protection effect for the reservoir dam.

The utility model relates to the field of underground equipment, and discloses an underground equipment transport vehicle which comprises a full-frame type hollowed-out chassis, and multifunctional equipment fixers are fixedly arranged on the two sides of the upper end face of the full-frame type hollowed-out chassis. Limiting mechanisms used for limiting the multifunctional equipment fixing devices are further installed on the two sides, located on the outer sides of the multifunctional equipment fixing devices, of the upper end face of the full-frame type hollowed-out chassis, and walking wheel pairs used for walking of the transport vehicle are installed at the front end and the rear end of the lower end face of the full-frame type hollowed-out chassis correspondingly. Coupler buffers used for being connected with a mine car and assisting in buffering impact force are installed at the middle points of the front end and the rear end of the full-frame type hollowed-out chassis. According to the utility model, the full-frame type hollow frame is adopted, so that ultra-large and ultra-high equipment can be transported. The underground transportation device has the advantages of large volume coefficient, small self-weight coefficient, short unloading and shunting time, large loading capacity, large trafficability of a loading station and an unloading station, and capability of improving the safety of underground transportation.

The utility model relates to the technical field of pakchoi harvest, in particular to a layering mechanism for arrangement and storage of a pakchoi harvester. The device comprises a rectangular frame, a layering device and a speed reduction device, the layering device and the speed reduction device are both installed on the surface of the rectangular frame, and one end of the layering device and one end of the speed reduction device penetrate into the rectangular frame; when the planting net baskets are pressed on the surfaces of the protruding layering hooks, the layering hooks on the upper portion are synchronously stretched to protrude, in the process that the next planting net basket moves downwards, the planting net baskets certainly press the protruding layering hooks, the layering hooks can limit the planting net baskets at the specified height, and meanwhile the adjacent layering hooks on the upper portion can be stretched to protrude. The two planting net baskets can be effectively separated, mutual stacking and squeezing of the two planting net baskets are avoided, and the probability that the pakchoi is crushed is reduced.

The present invention discloses an online monitoring device and method for the concentration of particulate matter in industrial exhaust gas, which relate to the technical field of environmental monitoring, and include a detection cylinder, a sealing cover plate is arranged on the top of the detection cylinder, an air inlet is fixedly penetrated through the top of the sealing cover plate, an air outlet is fixedly penetrated through the top of the sealing cover plate, a concentration detection mechanism is fixedly penetrated through the top of the sealing cover plate, and also includes a maintenance device; wherein the maintenance device includes a driving motor, a cross rod, a mounting plate, a push rod, a No. 1 spring, an extrusion plate, a cleaning cloth, a No. 1 shrapnel, a loading frame, a connecting rod, a C-shaped plate, a No. 2 spring, a limiting rod and a rectangular plate, and after the sealing cover plate is opened, the cleaning cloth can be quickly replaced, which effectively ensures the cleaning effect, and can also facilitate operators to inspect and maintain the concentration detection mechanism, thereby improving the reliability of the detection.