5results about How to "Lock tightly" patented technology

The invention discloses a novel nano-coating cast steel brick and a preparation method thereof. The cast steel brick comprises a cylindrical refractory matrix, a double-layer nano coating and a modified metal reinforcing belt, wherein the double-layer nano coating comprises a nano aluminum oxide bottom layer and a functional layer containing a sol-gel pre-coated graphene-ceramic composite material. According to the preparation method, pulse vibration forming, a sol-gel pre-coating technology and a carbon thermal reduction protective atmosphere sintering technology are adopted, the graphene-ceramic composite material has an Al2O3-BN double-layer ceramic coating layer protection structure, and the structural stability of graphene at the high temperature is ensured. The technical problems of low refractoriness, poor corrosion resistance and short service life of a traditional cast steel brick are solved, the refractoriness is improved by about 6%, the corrosion resistance is improved by 78%, the thermal shock stability is improved by about 79%, the single use performance is improved by 250%, and the cast steel brick is suitable for molten steel flow control in a continuous steel casting process.

The utility model relates to dental handpiece cleaning technical field, concretely is a kind of oil mist protection bag for dental handpiece, including oil-proof bag;Oil-proof bag is equipped with oil absorption locking mechanism, the oil absorption locking mechanism includes installation groove and oil absorption cotton, multiple oil absorption holes are set up in the oil absorption cotton, the inside sliding connection of installation groove has locking rope, the beneficial effect of the utility model is: oil absorption locking mechanism can place dental handpiece head in the inside of oil absorption cotton, make the oil dirt released when mobile phone cleaning be fully adsorbed by oil absorption cotton, avoid oil dirt overflow;At the same time, the head of oil-proof bag is realized tightly locked by tightening rope, can effectively block the path of oil dirt from bag mouth leakage in operating process, can completely eliminate oil mist diffusion, reduce the pollution to environment.

The utility model relates to the field of wear -resisting material and parts, disclose detachable combination type wear -resisting ball, including base body, the outer wall of base body is connected with a plurality of connecting columns fixedly, a plurality of connecting columns away from the one end of base body all are connected with fixed disc fixedly, the inside screw thread connection of fixed disc has fixed column, the outside of base body is equipped with a plurality of housings. In the utility model, through the accurate embedding of the sharp end of the opener into the inner wall of the groove on the top of the fixed column, steady force is applied to rotate in the counterclockwise direction, the fixed column is unscrewed from the inside of the fixed disc by virtue of the lever principle to overcome the thread resistance, then, the damaged housing can be easily taken off from one side of the fixed disc due to the loss of the constraint of the fixed column, after replacing the new housing, the positioning disc is aligned with the preset clamping groove in the housing and is vertically pressed and embedded, ensuring accurate positioning, finally, the opener is used again to resist the groove and rotate clockwise.

The utility model relates to a wooden formwork butt joint assembly fastener which comprises a first formwork body and a second formwork body, a first installation assembly is fixed to the first formwork body, and a second installation assembly is fixed to the second formwork body. The first mounting assembly comprises a U-shaped mounting plug bush; one end of the connecting mechanism is connected with the U-shaped mounting plug bush through a bolt, and the other end of the connecting mechanism is provided with an insertion strip with a ratchet bar I; the second mounting assembly is provided with an L-shaped slot, and a ratchet bar II is arranged at the bottom of the slot; when the inserting strip is inserted into the inserting groove, the first ratchet bar and the second ratchet bar are meshed and locked. A pressing plate is arranged at the end of the inserting strip, and the first ratchet bar and the second ratchet bar are separated by pressing the pressing plate. According to the fastening piece for butt joint and assembly of the wooden formworks, disassembly and assembly are fast, locking is achieved when inserting is conducted, unlocking is achieved when pressing is conducted, and the operation time is shortened by more than 60%; the template is protected, and the repeated utilization rate of the template is increased to 95%; the structure is reliable, double guarantee of ratchet meshing and reed elasticity is achieved, and maintenance is convenient.

This invention relates to the field of rail transit signaling equipment technology, specifically disclosing an LED signal controller and its usage method. The LED signal controller of this invention includes a base and at least two light boxes. All the light boxes are stacked and connected sequentially from top to bottom, with the center of all the light boxes aligned on a central line. The connection between each pair of adjacent light boxes is a square sleeve structure. A rubber ring is interference-fitted between the upper and lower light box connection parts. Spring washers are disposed on the top of the base. By using a square sleeve structure with interference-fitted rubber rings between adjacent light boxes, the center of all the light boxes is aligned on a central line, completely solving the problem of easy turning with circular sleeves, while simultaneously achieving waterproofing, dustproofing, and vibration resistance. The spring washers between the base and the light boxes effectively absorb vibration, preventing bolt loosening, and the self-locking latch ensures a tight lock on the door cover, further improving overall sealing and vibration resistance.