8results about How to "Reduce additional stress" patented technology

The utility model discloses a kind of friction pendulum supports, including bottom mounting plate, the top surface of the bottom mounting plate is fixedly provided with lower seat plate, the upper spherical surface of middle seat plate is sliding surface, install sliding plate wear plate after cooperation with the mirror surface stainless steel plate of upper seat plate, it is ensured that support is smooth in horizontal direction on sliding.The sliding design can effectively release the displacement of structure in horizontal direction, reduce the damage of earthquake and other dynamic effect to structure.By setting anti-falling beam boss in the upper and lower spherical surface center position of middle seat plate, and setting anti-falling beam boss avoidance area groove and anti-falling beam boss avoidance area and groove side wall in the corresponding position of upper seat plate and lower seat plate, a set of reliable anti-falling beam protection device is formed.When earthquake reaches or exceeds maximum design displacement, anti-falling beam boss and groove side wall contact, effectively limit the relative displacement of upper seat plate and lower seat plate, prevent bridge structure from falling off, greatly improve the safety of building and bridge under extreme conditions such as earthquake.

The utility model provides a low-additional-stress bridge approach road composite structure, and relates to the technical field of bridge approach roads, the low-additional-stress bridge approach road composite structure comprises two sets of box bodies, the box bodies are poured in the road ground through reinforced concrete, a box type void structure is formed, a mounting table is arranged at the bottom of the inner side of each box body, and pipelines are laid on the two sides of the upper end of each mounting table; a bridge floor is flatly paved in the middle of the top ends of the two groups of box bodies; a bottom plate is arranged at the bottoms of the box bodies and is poured in the road ground through reinforced concrete, a cushion layer and a waterproof layer are laid at the bottom of the bottom plate, and a door opening is formed between the two box bodies and is formed in the bottoms of the two box bodies. According to the utility model, the reinforced concrete box body is arranged, and the bridge floor and the internal pipeline are laid on the top of the box body, so that the requirements of upper passing and laying and overhauling of the internal pipeline can be met simultaneously, the bearing capacity requirement is reduced, and the effects of reducing the cost and facilitating pipeline overhauling are achieved.

The utility model discloses a radiant tube system structure and a natural gas converter comprising the radiant tube system structure. The radiant tube system structure comprises an inlet gas collection header pipe, a gas transmission header pipe and a plurality of groups of parallel radiant tube arrays, wherein each group of parallel radiant tube array comprises an inlet distribution tube, an outlet collecting tube and a plurality of paths of parallel radiant tubes; each parallel radiant tube comprises an inlet pigtail tube, a conversion tube and an outlet connecting tube which are sequentially connected from top to bottom, the two parallel radiant tubes are symmetrically distributed on the two sides of the inlet distribution tube, the inlet pigtail tubes are horizontally and vertically connected with the axis of the inlet distribution tube, and the outlet connecting tubes at the outlets of the parallel radiant tubes are connected with an outlet collecting tube. And a group of connected radiant tube arrangement is formed. According to the utility model, the high-temperature expansion thermal stress of the whole pipe system during operation can be effectively reduced.

The invention discloses a device and method for adding a shock insulation platform to stone cultural relics, and relates to the technical field of building movement, the device comprises screws and an underpinning structure, and the multiple screws are arranged in the horizontal direction and used for supporting a stone cultural relic base; the underpinning structures are connected to the two ends of the screw rod; the stone cultural relic base is kept between the two underpinning structures after prestress is applied to the screw rods; wherein the screw rod can be connected with the shock insulation platform after the underpinning structure is dismounted. The stability of the stone cultural relics in the moving process can be guaranteed, the device can be effectively connected with the stone cultural relics, the integrity is improved, and the shock (vibration) isolation effect can be guaranteed.

The invention relates to a semi-underground material warehouse and a material warehouse design method.The semi-underground material warehouse comprises a warehouse body which can be partially embedded underground, a material storage cavity is formed in the warehouse body and is divided into a plurality of cavities by partition walls, the multiple partition walls are arranged in the length direction of the warehouse body at intervals, and the partition walls are arranged in the warehouse body at intervals; and a plurality of discharge ports communicated with the storage cavity are formed in the bottom of the bin body at intervals in the length direction of the bin body. According to the semi-underground material warehouse and the material warehouse design method, the problems that an existing material warehouse foundation treatment project amount is large, and the foundation settlement deformation amount is large are solved.

This invention discloses a crusher crushing plate stroke adjustment transmission device, including a frame, a rotor assembly, a crushing plate, and a stroke transmission assembly. The crushing plate includes an upper crushing section and a lower crushing section distributed along the material flow direction, which are connected by a hinge structure. The stroke transmission assembly includes a drive motor, a worm gear reducer, and an adjusting screw. The adjusting screw passes through the frame and is connected to the crushing plate through a ball-end self-aligning connection structure. A guide floating sleeve is provided between the adjusting screw and the frame. When the crushing plate undergoes an angle change during operation, the ball end can generate relative rotation within the self-aligning seat, thereby adapting to and compensating for the angle change. Through the synergistic effect of the above structures, the off-center load on the adjusting screw can be reduced during crushing plate adjustment, improving the operational stability of the adjustment mechanism under impact conditions.

The invention relates to a micro vibration compaction pile construction technology, and belongs to the field of engineering construction. According to the method, hole forming is conducted through vibration construction, then pile forming is conducted through grouting, vibration impact construction, vibration tube sinking method construction or cross wing resonance method construction can be adopted in the vibration construction, a micro vibration impact device is adopted in the vibration impact construction, a vibration hammer and a pile tube are adopted in the vibration tube sinking method construction, and a vibration hammer and a cross steel plate are adopted in the cross wing resonance method construction. The diameter of the micro vibration compaction pile obtained through construction is smaller than or equal to 300 mm, additional stress caused by construction is small, damage force to the periphery is small, and construction noise is low; the excitation frequency is high, and the force transmission direction and directivity are strong; the pile forming speed is high; the device is high in design flexibility, is suitable for various different soil conditions, and is especially suitable for soft soil areas.

The application discloses a kind of tapered roller bearing and its preparation process, including bearing inner ring, bearing outer ring, roller and cage, bearing inner ring is made of carburizing steel material, bearing outer ring is made of carburizing steel or high-carbon chromium bearing steel material, bearing inner ring outer wall and bearing outer ring inner wall are all provided with raceway, bearing inner ring and bearing outer ring are all processed by heat treatment process to make raceway surface form carbon potential layer, further including a preparation process, including following flow: S1, after cutting seamless steel tube, it is prepared into bearing outer ring and bearing inner ring by cold extrusion molding;S2, bearing outer ring is processed by heat treatment;S3, bearing inner ring is processed using carburizing heat treatment process and cold treatment process.The application solves the problems that traditional tapered roller bearing inner and outer ring material adaptability is poor, raceway wear resistance and strength performance are uneven, bearing is easy to appear wear deformation and fatigue failure when serving, and the overall heat treatment process lacks pertinence.