14results about How to "Reduce stress levels" patented technology

The invention discloses an opposite-pull assembly for a UHPC bent cap formwork, the UHPC bent cap formwork and a combined bent cap. The opposite-pull assembly comprises an opposite-pull rod and a pair of opposite-pull rod fixing pieces arranged on the tops of a pair of formwork webs correspondingly. The opposite-pull rod fixing piece comprises a pre-buried fixing plate fixedly arranged on the inner surface of a formwork web and a clamping plate fixedly arranged on the outer surface of the formwork web, and through holes allowing the opposite-pull rods to penetrate through are formed in the areas, exceeding the top of the formwork web, of the pre-buried fixing plate and the clamping plate. And the end parts of the opposite pull rods penetrate through the through holes in the pre-embedded fixing plate and the clamping plate, and are fixed through an inner fastener positioned on the inner surface of the pre-embedded fixing plate and an outer fastener positioned on the outer surface of the clamping plate. The opposite-pull rod is arranged above the top of the formwork web, the opposite-pull rod can be dismantled and reused, and the economic performance is good. And meanwhile, holes are not required to be formed in the formwork webs for mounting the opposite-pull rods, so that the structural integrity of the formwork webs is better, and the appearance is more attractive.

The utility model provides a flange used for a bell jar standing cavity and the bell jar standing cavity, and the flange used for the bell jar standing cavity comprises an annular flange main body and an external connection part used for being connected with an external base, the external connecting part is arranged on the outer side wall of the flange main body; an annular butt joint groove used for being in butt joint with a bell jar standing cavity is formed in the upper end of the inner side wall of the flange body, and the bottom wall of the annular butt joint groove is connected with the inner side wall of the flange body through a first inclined face. The first inclined face is used for being matched with the bottom end face of the bell jar standing cavity to form a first groove used for welding when the bell jar standing cavity is embedded in the annular butt joint groove. According to the utility model, the effective length of the weld joint at the joint of the flange and the bell jar standing cavity is increased, so that the stress level of the weld joint in unit length is effectively reduced, the connection stability between the flange and the bell jar standing cavity is enhanced, and the overall rigidity of a final product is improved.

The present application relates to a kind of combination bridge deck structure and its construction method, it includes: bridge deck slab;Multiple stiffening ribs, multiple the stiffening ribs are spaced apart along the bridge direction, and are all fixed in the bottom of the bridge deck slab along the longitudinal direction;At least one transverse diaphragm, the transverse diaphragm is vertically fixed in the bottom of the bridge deck slab;Ultra-high performance concrete layer, the ultra-high performance concrete layer is arranged on the top of the bridge deck slab, and multiple cavities are formed between the bridge deck slab, each the cavity is along longitudinal direction extends, and is spaced apart at the transverse diaphragm, and the cross section of each the cavity is arch-shaped.The present application is based on arch effect by the cavity formed between ultra-high performance concrete layer and bridge deck slab to transfer upper wheel load to the stiffening rib below bridge deck slab dispersion, reduce the stress of bridge deck slab, improve the stress distribution of bridge deck slab.Further, the present application uses connecting assembly instead of shear nail, and lays finished steel mesh on connecting assembly, simplifies field construction process.

The invention discloses a method for separating cochlea related cells in situ based on a patch clamp system. The method comprises the following steps: contacting an electrode with a target single cell under a microscope, and carrying out in-situ grabbing on the target single cell through negative pressure adsorption; the target single cell and surrounding cells are kept in a connection state before in-situ grabbing; before the electrode approaches the target single cell, positive pressure is continuously applied, and when the electrode is in contact with the surface of the target single cell, the positive pressure is instantly stopped and switched to negative pressure. According to the method provided by the invention, high-quality cochlea related cells can be obtained in situ for deep sequencing analysis, and the method can be used for basic research and accurate diagnosis and treatment of clinical hearing impairment, and has a good application prospect.

This invention discloses a welding method for fabricating a three-dimensional reinforced steel / aluminum welded joint on a steel surface, belonging to the field of dissimilar metal welding technology. This invention employs laser selective melting to fabricate a three-dimensional geometric structure on the surface of a steel substrate, forming a surface with a high aspect ratio and high specific surface area. By using brazing or fusion brazing methods, the bonding area between the liquid aluminum and the steel plate and the three-dimensional geometric structure is greatly increased, effectively suppressing crack propagation and achieving a dual enhancement of the strength and toughness of the steel / aluminum dissimilar metal joint. This method increases the specific surface area of ​​the steel / aluminum joint interface, improving sliding resistance under external loads, while the three-dimensional geometric structure itself bears some of the stress. Simultaneously, the three-dimensional geometric interface structure can alleviate joint interface stress and improve stress distribution, which is beneficial for obtaining a welded joint with good performance.

The utility model belongs to the technical field of structural strength analysis, and particularly relates to a split type flange connecting piece for balancing torsional moment, which comprises a pin shaft, a flange, a flap rib web, a first connecting bolt, a second connecting bolt and a flap driving structure, a through hole of which the axis is vertical to that of the pin shaft is formed in the cylindrical surface of the pin shaft; the flange is provided with a cylinder used for installing a pin shaft and a flange edge located at one end of the cylinder, and the cylinder is provided with an installation through hole with the axis perpendicular to the axis of the cylinder. The pin shaft is inserted into a cylinder of the flange, the first connecting bolt penetrates through a flange mounting through hole to be axially fixed with a through hole of the pin shaft, the flange is fixed on a flap rib web through the second connecting bolt, and the pin shaft is fixedly connected with a flap driving structure.

The present application relates to the technical field of rocket engine test device, and particularly relates to a combined self-tight sealing structure for the head of a thrust chamber, which is used for sealing the head of the thrust chamber during testing; the combined self-tight sealing structure comprises a first sealing assembly, a second sealing assembly and a third sealing assembly; the first sealing assembly and the second sealing assembly both form annular sealing surfaces on the head of the thrust chamber, and the sealing surfaces of the first sealing assembly, the second sealing assembly and the third sealing assembly are sequentially arranged from outside to inside, and jointly seal the head of the thrust chamber; the first sealing assembly transmits a test load to the flange of the head of the thrust chamber, the second sealing assembly transmits the test load to the back of the flange of the head of the thrust chamber, and the third sealing assembly transmits the test load to the base of the test device; the high-pressure load during testing acts on the first sealing assembly, the second sealing assembly and the third sealing assembly respectively, thereby improving the safety factor of each sealing assembly and reducing the stress level of the sealing member under high-pressure test conditions.

This utility model discloses a plastic-coated steel pipe bend joint suitable for low-temperature conditions, comprising a bend section and straight pipe sections welded to both ends, forming a bend structure. It also includes: a stress buffer device comprising a corrugated compensator welded to the junction of the bend section and the straight pipe section, and a flow-damping orifice plate connected to the other end face of the corrugated compensator; and a damping sliding pair comprising a damping sliding tube fixed to the outer wall of the flow-damping orifice plate and a fixed damping kit fitted into the inner wall of the straight pipe section. The end face of the corrugated compensator connected to the flow-damping orifice plate is a free end that slides axially along the straight pipe section, and the damping sliding tube and the fixed damping kit achieve a sliding seal through an elastic seal. This utility model uses the sealing gas, the elastic material in the corrugated compensator, and the friction generated by the relative sliding of the damping sliding tube and the fixed damping kit to jointly counteract the pressure caused by frost heave, making the joint fully adaptable to low-temperature conditions.

The application discloses a tendon post-processing method for a robot dexterous hand and application thereof and belongs to the technical field of tendons. 3 ‑10 4 times of dynamic loading-unloading cycles; step 2, the tendon to be processed is tensioned at 30% of the rated load, is placed in liquid nitrogen at-196 DEG C for cryogenic treatment for 2-8 hours, is then warmed to room temperature at a rate of 5-8 DEG C / min, is again tensioned at the working load, is placed in liquid nitrogen at-196 DEG C for cryogenic treatment for 2-8 hours, and is then warmed to room temperature at a rate of 5-8 DEG C / min. The application eliminates the tiny internal stress or structural relaxation existing in the tendon after twisting and improves the structural stability of the tendon. In addition, the application completely releases the internal stress of the tendon, reduces the overall stress level of the tendon and improves the fatigue performance of the tendon.

This invention discloses a fusion reactor divertor tube-plate composite module and cooling target plate structure, relating to the field of magnetic confinement fusion divertor technology. The composite module includes a plasma-facing component and a transition layer. The plasma-facing component is located on the periphery and is used for contact with the plasma. A through-hole matching the transition layer is provided in the plasma-facing component. The transition layer is metallurgically connected within the through-hole, and a cooling pipe is metallurgically connected within the transition layer. Coolant flows through the cooling pipe to remove heat generated by fusion. The outer side of the transition layer has a U-shaped structure with a flat top and a round bottom, while the inner side has a circular structure. This design effectively increases the weight ratio of the transition layer to the plasma-facing component, improving the overall thermal conductivity of the composite module, alleviating stress and strain concentration problems, and ensuring the safety of the divertor target plate module, preventing the target plate material from detaching and contaminating the reactor core plasma under high heat loads.

The application discloses a kind of carbon dioxide geological storage well cementing anticorrosion additive and application.The anticorrosion additive includes the following weight parts of each component: 40~50 parts of rice hull ash, 30~50 parts of alkali-soluble acrylic resin powder, 10~30 parts of silica ash and 5~15 parts of fiber.The anticorrosion additive can significantly reduce the chemical corrosion effect of carbon dioxide on the cement stone and the stress corrosion effect under the coupling condition of stress by densification, alkali reduction, toughening and other comprehensive effects, can effectively improve the anticorrosion ability of carbon dioxide geological storage well cementing cement sheath, ensure the integrity of wellbore sealing.

The application discloses a bag type recyclable pressure type anchor rod, which comprises an anchor head anchor, a rod body, a bearing body and an anchoring body. The rod body comprises a steel strand and a protective sleeve, the protective sleeve is sleeved on the periphery of the steel strand, the bearing body is connected with the steel strand at the end of the rod body, and the anchoring body comprises a cement soil anchoring body and a cement slurry anchoring body. The cement soil anchoring body is formed by high-pressure rotary jet grouting process of cement slurry and surrounding soil, and the cement slurry anchoring body is formed by injecting cement slurry into a bag around the rod body through a reserved grouting pipe. The anchor rod makes the shear stress distribution of the anchoring body and the soil interface more uniform, effectively prevents the cement soil anchoring body from being damaged under pressure, and fully plays the bearing performance of the anchoring body. The application also provides a bearing capacity calculation method of the bag type recyclable pressure type anchor rod, which can obtain the limit bearing capacity data of the anchor rod concisely, efficiently and accurately.

The utility model discloses a kind of mobile phone screen module, it is related to screen module technical field, including outer screen, inner screen and the OCA glue layer being set between outer screen and inner screen, the inner screen is attached on the back of outer screen by OCA glue layer;Along the outer screen back periphery is equipped with stepped groove, the stepped groove includes the first step groove and the second step groove being connected, the first step groove is close to outer screen edge position, the second step groove is set in the first step groove inside, silk printing layer is equipped in the second step groove, to form the silk printing frame acting on outer screen by silk printing layer, wherein, the OCA glue layer is attached on the back of silk printing layer, the surface of first step groove and the back of outer screen located outside stepped groove;Effectively protect the silk printing layer, reduce its abrasion, cracking risk due to external force impact to some extent, to guarantee the integrity of silk printing frame and the long-term reliability of screen.

The application discloses a box, a battery device and a vehicle. The box comprises a bottom plate and a frame. The frame is arranged around the periphery of the bottom plate and defines a containing space. A first beam is arranged in the containing space. The first beam extends in a first direction and is connected to the frame in a second direction to divide the containing space into an electrical area and an energy area. The bottom plate comprises an energy area bottom plate and an electrical area bottom plate. The frame comprises a first frame arranged opposite in the first direction and a second frame arranged opposite in the second direction. The second frame, the electrical area bottom plate and the first beam that participate in defining the electrical area are configured as an integral piece. Thus, the force bearing interface can be expanded, the structural rigidity of the box, especially the bending and torsional rigidity, can be significantly improved, the structural rigidity and the anti-vibration fatigue performance of the box can be improved, the rigidity and the modal main frequency of the battery device can be improved, the deformation amplitude of the box structure in the vibration process can be reduced, the stress level can be reduced, and the fatigue strength can be improved.