22results about How to "Reduce shock pressure" patented technology

The invention discloses an oil return buffer device and an impact test system with the same. The oil return buffer device comprises a cylinder barrel assembly, a buffer piston, an impact piston, an overflow detection loop, an oil charge detection loop and an air charge detection loop. A first inner barrel cavity, a damping hole and a buffering cavity are formed in the cylinder barrel assembly, and the buffering cavity is connected with an oil filling detection loop. The buffer piston is arranged in the first inner cylinder cavity so as to divide the first inner cylinder cavity into a first side cavity and a second side cavity. The buffer piston is provided with a second inner cylinder cavity, the impact piston is arranged in the second inner cylinder cavity to divide the second inner cylinder cavity into an oil return cavity and an air cavity, the oil return cavity communicates with the first side cavity, and the air cavity communicates with the inflation detection loop. The device has the obvious impact stage and the buffering stage, the instant impact pressure is rapidly reduced in the impact stage, the deceleration back pressure is obtained through oil pressure loss in the buffering stage, the buffering effect is obvious and easy to control, and the device is suitable for the field of high-speed large-flow oil return buffering of an impact hydraulic system.

The utility model relates to a large typhoon-resistant deep sea aquaculture net cage which comprises a net cage floating body structure located under the water surface, and the net cage floating body structure is provided with at least one annular submerging and floating pipe. The upper-layer low-resistance net hanging structure is located above the net cage floating body structure, the upper-layer low-resistance net hanging structure is provided with a plurality of vertical rods which are integrally and annularly distributed at intervals, each vertical rod is provided with an upper end and a lower end, and the lower ends of the vertical rods are connected to the net cage floating body structure; the netting is integrally arranged in an internal space formed by the upper-layer net hanging structure and the net cage floating body structure, and the upper part of the netting is connected to the upper ends of the vertical rods of the upper-layer net hanging structure. According to the net cage floating body structure, at least one submerging and floating pipe forms a bearing structure to serve as a main body structure, the main body structure has the net cage submerging and floating functions at the same time, the main body structure is located at the bottom of the periphery of the net cage, and a plurality of vertical rods with enough strength are upwards used for hanging nettings. The impact pressure of stormy waves on the whole net cage is reduced, and seawater inside and outside the net cage efficiently exchanges.

The invention relates to the technical field of hydraulic supports, in particular to a control system for a double-telescopic stand column, which comprises the double-telescopic stand column, a first valve, a second valve and a control device, the double-telescopic stand column comprises a first cylinder body, a second cylinder body and a supercharging device. The supercharging device comprises a plunger and a piston assembly; the movable column is movably arranged in the second cylinder body, and a pressurization connector is formed at one end of the movable column; the piston assembly is movably arranged in the plunger, and one end of the piston assembly is arranged close to the pressurization connector; the first valve is arranged at the pressurization connector, and the second valve is arranged at a liquid opening of the second cylinder body. The control device is in electric control connection with the first valve and the second valve. The double-telescopic stand column adopts a structure with a built-in supercharging device, so that the occupied space is reduced, and the structure is simple; in the column descending process, due to the fact that the first valve is opened firstly, the pressure in the second cylinder body is reduced, when the second valve is opened, the impact pressure of liquid on the second valve is reduced, and therefore the safety of the valve is effectively protected.

A knee joint structure with an oil pressure control function comprises a knee joint head, an oil pressure axis and an oil baffle block, the knee joint head is provided with a containing space, an upper oil channel, a lower oil channel and a common channel, the oil pressure axis is arranged in the containing space, and the oil baffle block is arranged on the inner wall of the knee joint head and abuts against the oil pressure axis. The containing space is defined into an upper oil chamber and a lower oil chamber, the upper oil chamber is communicated with the upper oil channel, the lower oil chamber is communicated with the lower oil channel, and the oil baffle block is communicated with the common channel. The buffer oil chamber is directly arranged in the knee joint head, so that the cost can be saved, fluid can be mutually circulated by means of the pressure difference between the upper oil chamber and the lower oil chamber when the knee joint head rotates (anticlockwise or clockwise) and is bent, and the oil pressure buffer effect is achieved; therefore, the impact pressure borne by a user during walking can be effectively relieved, and the walking posture is more natural and relaxed.

The utility model relates to battery technical field especially relates to a battery top cover subassembly and battery monomer. The battery top cover subassembly includes top cover, buffer and check valve, and top cover is provided with liquid injection hole. Buffer sets up in the side of top cover to the direction of electric core. Along the axial direction of liquid injection hole, the projection of buffer and the projection of liquid injection hole at least partly overlap, and the circumferential side surface of buffer and the inner wall surface of liquid injection hole form liquid injection runner. Check valve sets up between buffer and liquid injection hole, and check valve communicates with liquid injection runner to make the one-way flow of electrolyte in liquid injection runner. The battery monomer includes above -mentioned battery top cover subassembly, and the buffer effect of electrolyte is played to buffer and direct action through buffer, avoids the direct impact of electrolyte to electric core, to avoid the diaphragm of electric core top to take place and turn over and lead to short circuit. Meanwhile, electrolyte disperses and flows along liquid injection runner, and the liquid injection efficiency is improved. In addition, check valve makes the one-way flow of electrolyte in liquid injection runner, and avoids the overflow.

The utility model discloses an urban river channel revetment structure integrating landscape and ecological functions, and relates to the technical field of river channel revetments, the urban river channel revetment structure comprises a slope body and green plant modules, a plurality of supporting structures are uniformly arranged on two sides of the slope body along the slope direction, and the top surfaces of the supporting structures are horizontally arranged; the two ends of the bottom wall of each green plant module are erected on the top walls of the two supporting structures at the same height correspondingly. The device has the advantages that the diversity and adaptability of a plant-rock-soil body system in the conventional technology can be improved, and the challenges faced by the plant survival rate and the landscape effect in different water level stages (the wet season, the flat season and the dry season) of a river are effectively solved. And meanwhile, the problem of local water flow accumulation caused by rain wash in a heavy rainfall season and the phenomenon of unstable growth of bank slopes and green plants caused by the problem can be effectively solved.

This invention belongs to the field of hydraulic technology, specifically relating to a closed-loop motor hydraulic circuit and its control method, as well as a working machine. The closed-loop motor hydraulic circuit includes a hydraulic motor, a hydraulic pump, and a motor bypass oil circuit. The motor bypass oil circuit connects the inlet end and outlet end of the hydraulic motor and is equipped with a regulating valve for controlling the flow rate of the motor bypass oil circuit. The control method of the closed-loop motor hydraulic circuit includes the following steps: obtaining a speed control command for the hydraulic motor; adjusting the rotational speed of the hydraulic motor when the speed value corresponding to the speed control command is greater than a preset speed, and limiting the pressure at the inlet end of the hydraulic motor by controlling the regulating valve; adjusting the rotational speed of the hydraulic motor when the speed value corresponding to the speed control command is less than or equal to the preset speed. The above-described control method for the closed-loop motor hydraulic circuit enables precise and stable adjustment of the rotational speed and the pressure at the inlet end of the hydraulic motor.

This utility model discloses a multi-layer wear-resistant coating structure that adapts to scouring environments, belonging to the field of wear-resistant coating technology. The key technical points include a substrate with a wear-resistant protective layer on its surface. This protective layer consists of a first transition layer, an intermediate buffer layer, a second transition layer, and an outer rigid protective layer, arranged sequentially from the inside out. The substrate and the first transition layer are coated and bonded after sandblasting pretreatment. The first transition layer and the intermediate buffer layer are bonded by hot-pressing curing. This solves the problems of existing multi-layer wear-resistant structures, which often use direct coating or simply grind carbon steel substrates without targeted pretreatment, leading to easy peeling and detachment under long-term scouring. Furthermore, the interlayer bonding often uses a single curing process, failing to match the characteristics of different coating materials, resulting in gaps and cracks between layers, easy crack propagation along the interlayer boundaries, poor elasticity of the transition layer material, lack of self-healing design in the outermost layer, and no reasonable surface texture, resulting in weak wear resistance and damage resistance.

A kind of photovoltaic power station field dust fall device, including photovoltaic module, fixed support, hydraulic machine, dust removal rod and atomizing spray head.Lifting of dust removal rod is controlled by hydraulic machine, and top spray head sprays mist to remove dust.Dust suction hole is arranged in dust removal rod, is connected with negative pressure main pipe by air suction branch pipe, realizes dust suction function;Liquid supply system is connected with main pipe by branch pipe and spray head.Limiting ring is arranged between modules, and dust removal rod is slidably connected by rail clamping on both sides, to ensure stable operation.Bottom air inlet is connected with spiral air pipe and air suction branch pipe, and liquid delivery pipe is connected with liquid supply branch pipe by spiral liquid pipe.Controller realizes intelligent control by remote communication.The device has the advantages of simple structure, flexible extension, avoiding obstruction, dust suction and atomization collaborative operation, improving dust fall efficiency and power generation stability, energy saving and high efficiency, strong applicability.

The invention relates to the technical field of oil well pipelines, in particular to an oil well pipeline anti-leakage sealing protection device and a using method thereof. According to the technical scheme, the oil well pipeline anti-leakage sealing protection device comprises a first pipeline protection ring, a second pipeline protection ring, a third pipeline protection ring, an inner clamping adjusting assembly, a pressure relief sealing protection assembly and a slow flow filter plate; the inner clamping adjusting assemblies are arranged on the inner sides of the first pipeline protection ring, the second pipeline protection ring and the third pipeline protection ring and can be used for being matched with the pipeline diameter to increase the sealing performance, and the pressure relief sealing protection assemblies are distributed on the first pipeline protection ring, the second pipeline protection ring and the third pipeline protection ring. The device can be used for pressure relief early warning protection, and the whole pipeline sealing protection effect is improved.

The invention belongs to the technical field of sealing, and particularly relates to a self-pressurization energy storage type seal and high-pressure pneumatic seal combined sealing assembly which comprises a self-pressurization energy storage type seal and a high-pressure pneumatic seal. The self-pressurization energy storage type seal and the high-pressure pneumatic seal are combined in series to be used for a working environment needing to isolate high-pressure liquid and high-pressure gas media, an ideal sealing state is achieved, the self-pressurization energy storage type seal is arranged on the side facing the liquid, and the high-pressure pneumatic seal is arranged on the side facing the gas. The self-pressurization energy storage type seal comprises a sealed shaft (1), a swallow-tail-shaped clamping sleeve (2), a V-shaped spring (3), a triangular block (4) and a sealing cavity (5). The high-pressure pneumatic seal comprises a pneumatic base body (6), an X-shaped ring (8), a large O-shaped ring (9) and a small O-shaped ring (10). Compared with a traditional sealing structure, the sealing assembly has a better high-pressure-resistant sealing effect.

The utility model provides a large-flow submersible pump, which relates to the technical field of submersible pumps, and comprises a motor, a pump body and a diversion channel, the lower part of the motor is provided with a thrust bearing seat, the bottom end of the motor is provided with a base, the upper end of the motor is provided with a pump shaft, the pump shaft is positioned in the center of the pump body, the middle part of the pump body is provided with a water inlet section assembly, and the water inlet section assembly is provided with a water outlet. An upper flow guide shell assembly is arranged on the upper portion of the pump body, a flow guide channel is installed in the upper flow guide shell assembly, a check valve assembly is installed at the upper end of the upper flow guide shell assembly, the outer side of the upper portion of the motor is sleeved with a motor connecting frame, a shaft rod lower connecting sleeve is arranged above the motor connecting frame, and the lower portion of the pump shaft is sleeved with the shaft rod lower connecting sleeve. Water flow can be conveniently and rapidly pumped in, the water flow entering the pump body flows into the flow guide channel in a wave-shaped curve track mode, water flow impact pressure and abrasion can be reduced, water flow reverse flow is effectively avoided, use is more stable and reliable, and durability is achieved.

The utility model discloses a hollow fiber nanofiltration membrane for water treatment, and relates to the technical field of nanofiltration membrane filter elements, the hollow fiber nanofiltration membrane for water treatment comprises a membrane shell, the membrane shell is of a cylindrical structure with two open ends, the hollow fiber nanofiltration membrane is installed in the membrane shell, a first connector is installed at the top of the hollow fiber nanofiltration membrane, and a second connector is installed at the bottom of the hollow fiber nanofiltration membrane. The bottom end of the first connector is provided with a fixing ring through the inner wall of the membrane shell, a central pipe is arranged in the hollow fiber nanofiltration membrane, the top of the central pipe is a sealed end, the bottom of the central pipe is provided with a second connector, and the bottom of the second connector is provided with a sealing end. According to the scheme, the problems that in the using process of an existing water treatment hollow fiber nanofiltration membrane, due to the fact that the membrane shell is fixedly connected with the upper sealing head and the lower sealing head and cannot be detached, after the membrane shell is used for a period of time, external pressure type nanofiltration membrane tows in the membrane shell are difficult to clean or replace, and the membrane shell cannot be detached are solved. Therefore, the filtering effect of the hollow fiber nanofiltration membrane is influenced.

The application discloses a super-deep buoyancy type large double-wall steel hanging box in severe sea conditions, which comprises A section wall body, B section buoyancy cabin and C section wall body which are rigidly connected in sequence from bottom to top, and watertight sealing structures are arranged between the sections. A construction method of the super-deep buoyancy type large double-wall steel hanging box in severe sea conditions comprises the following steps: S1, prefabrication and processing; S2, section assembly; S3, floating and positioning; S4, bed fixation; S5, tide adaptation debugging; S6, bottom sealing concrete construction; S7, buoyancy conversion; S8, completion detection. The application effectively resists the erosion of high-speed water flow in super-deep water area to the base; four groups of pressure sensors arranged at the bottom can monitor the base contact stress in real time, ensure that the steel hanging box is uniformly stressed after bed fixation, and significantly improve the anti-sliding and anti-inclination stability of the structure in severe sea conditions, and reduce the safety hidden danger caused by the base erosion.

This utility model discloses a multi-branch starch slurry conveying pipeline device for clogging prevention, relating to the field of conveying equipment. The utility model includes a conveying pipeline body, which comprises branch pipelines and a main pipeline. A set of guide vane mechanisms is provided inside the connection between the main pipeline and the branch pipelines. The guide vane mechanism includes a base, a transmission rod, and a rotating rod. The base is embedded in the lower part of the pipeline, and guide vanes are provided on the surfaces of the transmission rod and the rotating rod. This utility model achieves automated adjustment of the guide vanes through the linkage design of the guide vanes, the reduction motor, and the flow sensor. This stabilizes the liquid flow state in the branch pipelines while reducing impact pressure on the pipeline, extending pipeline lifespan, and shortening maintenance cycles. Furthermore, the flow guiding function of the guide vanes further realizes basic flow distribution, simplifying the fine adjustment process of the valves.

The invention relates to the technical field of explosion-proof electric appliance cabinets, in particular to a pressure-relief explosion-proof electric appliance cabinet which comprises a cabinet body, a pressure relief valve, a positive pressure system and an isolation assembly. The cabinet body comprises an outer shell and an inner shell; the isolation assembly comprises four groups of isolation plates, a pressure relief cavity formed between the isolation plates and the inner shell, and a pressure relief plate connected with the isolation plates; a pressure valve is arranged at the corner angle of the inner shell; a positive pressure cavity is formed between the outer shell and the inner shell, and a mounting cavity is formed in the inner shell; and when high pressure is generated in the mounting cavity, the isolation plate is opened to introduce high-pressure gas into the pressure relief cavity for pressure relief. According to the invention, by arranging the isolation assembly to isolate the electrical components in the inner shell and arranging the pressure relief cavity, secondary disasters caused by internal high-temperature and high-pressure gas leakage can be prevented through the pressure relief cavity when the internal electrical components break down and burn.

This invention discloses a shock absorber, suspension system, vehicle, and suspension control method for eliminating high-frequency pulsations. The shock absorber includes: a cylinder containing a main piston that divides the cylinder interior vertically into an upper main chamber and a lower main chamber; a compression valve and a return valve on the main piston; a piston rod connected to the top of the main piston, extending upwards through the cylinder; and an inner shell connected to a hollow rod. An elastic component is located inside the inner shell, dividing the inner shell vertically into an upper secondary chamber and a lower secondary chamber. The hollow rod extends upwards through the main piston, with its two ends connected to the upper main chamber and the upper secondary chamber, respectively. A throttling orifice connected to the lower secondary chamber is located on the bottom side of the inner shell. This invention adds a structure within the cylinder that can elastically attenuate fluid impacts, effectively reducing pulsations, minimizing the impact of large-amplitude, high-impact compressive damping forces, reducing the direct transmission of road impacts to the vehicle body, and improving vehicle ride smoothness.

This utility model relates to the field of fire door technology and discloses a fire door with explosion-proof function, including a door body and a cylindrical body. Multiple cylindrical bodies are welded and fixed to the inner side of the door body. An inner cavity is formed on the inner side of the cylindrical body. An opening communicating with the interior is provided on the front end of the inner cavity on the door body surface. Multiple vents communicating with the interior of the inner cavity are provided on the rear end of the inner cavity on the door body surface. A connecting rod is provided inside the cylindrical body and can slide through to the rear end of the door body. This utility model's technical solution, by providing multiple inner cavity structures formed by cylindrical bodies inside the door body, which communicate with the outside through openings and vents, allows for the rapid release of explosion pressure by inner and outer sealing plates. Explosive impact pressure can push against the inner sealing plate, compressing a heat-resistant spring and opening it. The outer sealing plate also moves accordingly, releasing the blockage of the openings and vents, thus quickly releasing the explosion pressure, reducing the impact pressure on the door body, thereby making the door body less susceptible to damage and improving its explosion-proof performance.

This invention discloses a safe, open-circuit-proof electrical connector, relating to the technical field of electrical connectors. Specifically, it includes a socket and a plug. The plug has a threaded connection at one end to a retaining ring, and one end of the retaining ring is threaded to a connecting ring. The connecting ring has a built-in reinforcement mechanism, and a cable is inserted into the end of the reinforcement mechanism. A fixing seat is threaded to one side of the plug, and a second cable is inserted into the end of the fixing seat. One end of the retaining ring has a mounting groove, and a recess is provided near the inner side of the mounting groove. An annular retaining sleeve is provided within the recess, and a conductor wire is welded to the bottom of the retaining sleeve. A retaining post is provided on the end face of the retaining ring near the circumference of the recess. This invention, through its nested connection structure between rings, not only ensures the connection stability of the components within the socket, but also provides a certain gap or void between the rings, buffering and absorbing impact forces, thus reducing the impact on the structure.

This utility model relates to the field of sorting machine suction nozzles, and more particularly to a sorting machine suction device with a buffer structure. It includes a first buffer assembly and a second buffer assembly; the first buffer assembly is disposed on a base plate, and the second buffer assembly is connected to a suction nozzle; the first buffer assembly has a sliding mechanism, a portion of which is fixed to the base plate, the base plate is connected to another portion via a first buffer member, and the other portion is connected to the second buffer assembly; the second buffer assembly has a suction nozzle fixing block connected to the suction nozzle, and a second buffer member is abutting between the suction nozzle fixing block and the suction nozzle; the first and second buffer members have the same deformation direction. This application transforms the contact between the suction nozzle and the material into a flexible contact by synchronously deforming the first and second buffer assemblies in the same direction, effectively reducing impact pressure and protecting fragile materials; its guide rail-slider mechanism ensures precise linear guidance and reliable operation during the buffering process.

The utility model discloses a high-speed sealing structure of a direct-drive rotary table, which comprises a rotary table body, a bearing seat mounted at one end of the rotary table body, a bearing mounted in the bearing seat, a rotary shaft mounted in the bearing, a rotary disk mounted at one end of the rotary shaft protruding out of the bearing, and an air seal ring mounted between the rotary disk and the bearing seat. A bearing outer ring pressing ring is further installed on the outer ring of the bearing, elastic rubber rings are installed at the positions, corresponding to the rotary disc, of the bearing outer ring pressing ring, graphite rings are installed at the opposite positions of the two elastic rubber rings, and the two graphite rings make close contact. The dynamic sealing structure design is adopted, high-pressure compressed air enters from the first air path in the rotary table machine body and is finally exhausted to the atmosphere from the slit between the bearing seat and the rotary disc, and therefore the air sealing effect is achieved; meanwhile, the graphite ring adopted by the utility model can prevent the cutting fluid from entering the bearing and the rotary table body from a gap between the rotating shaft and the bearing outer ring pressing ring.

The invention belongs to the technical field of sealing, and particularly relates to a combined high-pressure pneumatic seal, which is particularly important to design a pneumatic seal structure because the difficulty of sealing high-pressure gas is far greater than that of liquid. According to the combined pneumatic sealing structure of the sawtooth-shaped structure, the surface part, making contact with the cylinder barrel, of the pneumatic base body is designed to be of the sawtooth-shaped structure, a traditional smooth plane is replaced, and the groove is machined in the middle and used for installing the X-shaped ring; the sawtooth-shaped structure mainly reduces the pressure intensity of fluid in the seal through the echelon property of a plurality of sealing cutting edges, two symmetrical lateral open type grooves are designed in the lower end of the pneumatic base body and used for installing large O rings respectively, and meanwhile a sealing groove is machined in the middle of the bottom end of the pneumatic base body and used for installing small O rings. And the purpose of remarkably improving the backpressure pre-tightening force and the sealing effect is achieved.