54results about How to "Durable and reliable" patented technology

The invention relates to an insulating concrete material and a preparation method thereof. The concrete material is prepared by mixing a cementing material, coarse aggregate, fine aggregate, insulating additive, admixture and water, wherein the using amount of the cementing material is 350 to 700kg / m<3>; the using amount of the coarse aggregate is 850 to 1,150kg / m<3>; the using amount of the insulating additive is 20 to 150kg / m<3>; the admixture in an amount which is 0.2 to 2.0 percent based on the mass of the cementing material is used; and the volume rate of sand is 35 to 52 percent; and the ratio of water to the cementing material is 0.23 to 0.40. The electrical resistivity of the concrete material can be improved obviously, and the insulating concrete material is prepared, and can be used for the field with the insulating requirement on a concrete structure.

A pressure-sensitive adhesive composition for an optical film of the invention includes a (meth)acryl-based polymer(A), a polyether compound (B) having a polyether skeleton and a reactive silyl group and an ionic compound (C). The pressure-sensitive adhesive composition for an optical film has an antistatic function and can form a pressure-sensitive adhesive layer durable enough under severe conditions.

A pair of multi-purpose eyeglasses has a main frame (10) and an inner frame (20). The main frame (10) includes a lens holder for holding lenses and a pair of temple arms (14) foldably connected to both ends of the lens holder. The main frame has a pair of side assembling grooves formed on opposite edge portion of a rear surface of the lens holder. Each of the side assembling grooves (16) extending in a vertical direction and having an open upper and a closed lower end. The inner frame is detachably assembled with a rear surface of the lens holder and has a pair of side assembling protrusions (22) which are inserted in and engaged with the side assembling grooves when the inner frame is assembled with the main frame.

The invention relates to a powdery material spraying pump, which comprises air inlet pipe, a hollow pipe, a pump body, an air closer and a regulating valve, wherein an output opening of the air inlet pipe is communicated with the hollow pipe, one end of the hollow pipe is connected with the air inlet pipe, the other end of the hollow pipe is connected with a spray nozzle, slide iron is fixedly arranged on the hollow pipe, one end of the slide iron is fixedly arranged on the hollow pipe, the other end of the slide iron is arranged on a lead screw in a sleeving way, and the slide iron and the lead screw are screwed and connected; the spray nozzle extends into the pump body, the air closer is arranged above the pump body, one side of the pump body is sequentially connected with the spray nozzle, the hollow pipe and the air inlet pipe, the other side of the pump body is communicated with a cone pipe, the top of the pump body is communicated with the air closer, and the bottom of the pump body is communicated with an airflow source. The powdery material spraying pump has the advantages that the structure is simple, the operation is reliable, the full sealing is realized, no pollution is caused, the system manufacturing cost is low, the operation cost is low, and the automation degree is high.

Disclosed is a large-diameter shield tunnel concrete segment connecting construction. According to the large-diameter shield tunnel concrete segment connecting construction, weakening of the connecting construction to a concrete segment structure is reduced effectively, durability is reliable, fabricating is convenient, and the safety of hoisting operation is increased. The connecting construction comprises a first concrete segment and a second concrete segment which are located on the two sides of a joint. The first concrete segment is provided with a first hand hole, a first straight hole and a second straight hole. The outer end of the first straight hole communicates with the first hand hole. The axes of the first straight hole and the second straight hole are staggered. The outer end of the second straight hole communicates with the joint side end wall of the first concrete segment. The second concrete segment is provided with a second hand hole and an arc-shaped hole. One end of the arc-shaped hole communicates with the second hand hole, and the other end of the arc-shaped hole communicates with the joint side end wall of the second concrete segment. Ports of the second straight hole and the arc-shaped hole which are on the two sides of the joint correspond to each other. A first connecting rod provided with a straight section and an arc-shaped section penetrates into the second straight hole and the arc-shaped hole. A second connecting rod penetrates into the first straight hole from the first hand hole, and the rear portion of the second connecting rod penetrates through a connecting hole in the first connecting rod and is connected with the first connecting rod. A thread section is arranged on the front portion of the first connecting rod. A nut and retaining gasket assembly is mounted on the thread section in the second hand hole.

The invention provides an overall bridge large-tonnage and multi-pile-foundation active underpinning method. According to the method, an overall active underpinning structure needs to be provided. The method specifically comprises the steps that new piles, a longitudinal apron piece and a transverse apron piece are built, and a later-pouring node position is reserved on the longitudinal apron piece; a hoop is poured on an underpinned pile; ejecting and lifting force is exerted by the hoop so that the underpinned pile can be unloaded to zero axial force, and the underpinned pile is cut off; the underpinning node of later-poured reinforced concrete is built between the longitudinal apron piece and the underpinned pile, and stress conversion is finished; the steps are repeatedly carried out on each underpinned pile, and the overall active underpinning of all bridge pile foundations is finished. The invention further provides the overall bridge large-tonnage and multi-pile-foundation active underpinning structure. The number of the new piles needing to be arranged is small, and the difficulty that the piles cannot be arranged under the limitation of space is avoided. Differential settlement among the underpinned piles can be adjusted conveniently, and the stress performance and durability of the underpinned piles are reliable.

The invention relates to a steering column, which comprises an inner shaft, an outer shaft, columns of spherical objects, rigid rolling rail parts and elastic elements, wherein an axial groove of one of the inner and outer shafts is provided with two sunken support surfaces; each rigid rolling rail part comprises raised pivoting parts with raised pivoting surfaces and supporting parts with supporting surfaces, which are positioned on each side of a middle plane; the raised pivoting surfaces contact the sunken support surfaces; the supporting surfaces are pressed against and support the spherical objects; the elastic elements are positioned in the axial groove of one of the inner and outer shafts, and are pressed against the spherical objects to push and press the two rolling rail parts, so that torque transmission is avoided in a stationary state but is performed in a running state; each spherical object simultaneously contacts the two rolling rail parts and the axial groove of one of the inner and outer shafts; the radius of each raised pivoting surface of the two rolling rail parts is greater than that of the corresponding sunken support surface contacting the raised pivoting surface, so that two contact areas of pivoting axes parallel to a common axis can be defined and determined.

The invention discloses a dyeing and finishing method of a PVA non-woven fabric embroidery and a dyeing and finishing device thereof. The dyeing and finishing method includes scouring and bleaching, and comprises the following steps of: firstly, performing raw cloth inspection, cloth turning process and sewing process on the PVA non-woven fabric embroidery; then quickly wiping the PVA non-woven fabric embroidery on a hot metal surface while keeping the temperature of the metal surface to 750-850 DEG C; carrying out desizing treatment on the PVA non-woven fabric embroidery with hydrogen peroxide; then preparing a scouring working solution while controlling the temperature at 45-50 DEG C; putting the fabric having the liquid rolling treatment into a steam box for steaming and then rinsing for 30-50 minutes; finally, preparing 15-20 mol / L sodium hydroxide solution, and putting the fabric into sodium hydroxide solution to react for 15 to 30 minutes. By using the dyeing and finishing method, the cloth is dyed and finished, so that the cloth has good effects of oxidation resistance, wear resistance, sterilization, color fixation, flame retardance and fragrance enhancement. By using the dyeing and finishing device, dyeing color on the cloth is more even, which is more convenient to use.

The invention discloses a dynamic flower-shaped firework setting-off appliance. The dynamic flower-shaped firework setting-off appliance comprises a plurality of petal body parts for mounting fireworks and also comprises a screw part connected with a rotation driving mechanism; a front substrate and a rear substrate are axially arranged along the screw part; a root part of each petal body part isarticulated on the front substrate; a middle part of each pedal body part is articulated with one end of a connection rod part, and the other end of the connection rod part is articulated on the rearsubstrate; the screw part is used for driving the substrates to do forward-backward linear motion along the axial direction of the screw part so as to shorten an axial gap between the front substrateand the rear substrate, so that a firework shape with flowers which gradually bloom can be formed. According to the dynamic flower-shaped firework setting-off appliance, a screw driving manner is usedfor achieving a process of dynamically opening and closing the flower shape of the fireworks; the appliance is reliable and lasting in operation and convenient to mount and use, and can be used repeatedly; the dynamic flower blooming process speed can be controlled to be perfectly matched with setting-off rhythm, background music and firework body effect; the smoke is reduced; the setting-off safety is improved.

The invention discloses a main brush driving device for a pure electric sweeping vehicle and belongs to the field of the pure electric sweeping vehicle. The main brush driving device comprises a main brush, a main brush motor, a main brush lifting regulating pull rod and a main brush lifting bracket, wherein one end of the main brush lifting bracket is connected with the main brush motor while the other end is connected with a belt pulley; the main brush motor is used for driving the belt pulley to rotate through a belt; the belt pulley is fixed on a side wall of the main brush through a main brush end cover and used for driving the main brush to rotate; the main brush lifting regulating pull rod is vertically arranged relative to the main brush lifting bracket; one end of the main brush lifting regulating pull rod is hinged on a sweeping vehicle body while the other end is hinged on the main brush lifting bracket. The main brush driving device for the pure electric sweeping vehicle disclosed by the invention has the characteristics of high transmission efficiency, simple structure, performance stability, energy-saving effect, environmental protection and the like, and has reliable stability and durability for the complex operation environment of the sweeping vehicle.

The invention relates to an insulating concrete material and a preparation method thereof. The concrete material is prepared by mixing a cementing material, coarse aggregate, fine aggregate, insulating additive, admixture and water, wherein the using amount of the cementing material is 350 to 700kg / m<3>; the using amount of the coarse aggregate is 850 to 1,150kg / m<3>; the using amount of the insulating additive is 20 to 150kg / m<3>; the admixture in an amount which is 0.2 to 2.0 percent based on the mass of the cementing material is used; and the volume rate of sand is 35 to 52 percent; and the ratio of water to the cementing material is 0.23 to 0.40. The electrical resistivity of the concrete material can be improved obviously, and the insulating concrete material is prepared, and can be used for the field with the insulating requirement on a concrete structure.