65results about How to "To achieve the effect of silence" patented technology

The invention belongs to the technical field of municipal engineering well lids, and particularly relates to a municipal mute anti-theft well lid. The municipal mute anti-theft well lid comprises a well wall, an adjusting and position-clamping mechanism and a balance adjusting mechanism; and the balance adjusting mechanism is installed on a boss of the inner circle face of the well wall, and the adjusting and position-clamping mechanism is installed on the upper side of the balance adjusting mechanism. According to the well lid, the anti-theft function, the well lid height adjustment functionand the well lid balance adjustment function are achieved; clamping strips extending out of an adjusting shell adjusting groove can be inserted into an adjusting groove in the well wall, so that the function of limiting the up-and-down movement and the rotary movement of an adjusting shell and a top lid is achieved, and the beneficial effect that the well lid is prevented from being easily liftedis achieved; and the purpose of adjusting stretching and retracting of a clamping block is achieved by rotating an adjusting shaft through an auxiliary tool which is inserted into an adjusting shaft lock hole.

The invention belongs to the technical field of municipal engineering manhole covers, and particularly relates to an anti-theft manhole cover used in municipal engineering. The manhole cover comprisesa well wall, an adjustment clamping position mechanism and a balance adjustment mechanism, wherein the balance adjustment mechanism is installed on a boss of the inner round surface of the well wall,and the adjustment clamping position mechanism is installed on the upper side of the balance adjustment mechanism; and functions of prevention of thievery, height adjustment of the manhole cover, andbalance adjustment of the manhole cover are achieved. Clamping strips extending out of adjusting grooves of an adjusting shell can be inserted into adjusting grooves on the well wall to play the roleof defining the up and down movement and the rotating movement of the adjusting shell and a top cover, and the manhole cover can be prevented from being prone to being lifted. The purpose of adjusting the expansion and contraction of a clamping block is achieved by inserting an auxiliary tool into a lock hole of an adjustment shaft to rotate the adjustment shaft.

The invention belongs to the technical field of municipal engineering manhole covers, and particularly relates to a manhole cover used in municipal engineering. The manhole cover comprises a well wall, an adjustment clamping position mechanism and a balance adjustment mechanism, wherein the balance adjustment mechanism is installed on a boss of the inner round surface of the well wall, and the adjustment clamping position mechanism is installed on the upper side of the balance adjustment mechanism; and functions of prevention of thievery, height adjustment of the manhole cover, and balance adjustment of the manhole cover are achieved. Clamping strips extending out of adjusting grooves of an adjusting shell can be inserted into adjusting grooves on the well wall to play the role of definingthe up and down movement and the rotating movement of the adjusting shell and a top cover, and the manhole cover can be prevented from being prone to being lifted. The purpose of adjusting the expansion and contraction of a clamping block is achieved by inserting an auxiliary tool into a lock hole of an adjustment shaft to rotate the adjustment shaft.

The invention discloses a manual translation curtain structure, comprising fixing plates and fixing slide rails. The manual translation curtain structure is characterized in that each fixing slide rail is arranged in parallel from outside to inside; and each fixing slide rail is provided with a short slide rail; a back stopper is positioned on the back part at the inner side of the outer short slide rail; the outer side of the other adjacent short slide rail corresponding to the inside is provided with a front stopper and a back stopper; and the front stopper and the back stopper at the outer side of the inner adjacent short slide rail are fitted with the back stopper at the inner side of the outer short slide rail, so that the indoor light can be improved, the use is convenient, and the muted effect is good.

The invention discloses a wear-resistant and silent dual-rotor high-speed motor. The sound insulation board is composed of two components, A and B, in the ratio of A: B = 2:1. A and B contain the following components in parts by mass: A component Include the following components in terms of parts by mass: nano-silica powder: 11-19 parts, nano-zinc oxide: 9-12 parts, dimethylacetamide: 7-10 parts, methyl acetate: 3-8 parts , chloroprene rubber: 10-14 parts, tetraethyl orthosilicate: 8-12 parts, amino resin: 6-9 parts, auxiliary materials: 30-33 parts; the second component includes the following components by mass parts: Base emulsion: 17‑20 parts, antifreeze agent: 4‑8 parts, filler: 12‑19 parts, plasticizing resin: 3‑9 parts, vapor phase corrosion inhibitor: 1‑4 parts, curing agent: 20‑24 parts parts, defoamer: 19-22 parts, film-forming aids: 23-27 parts, the present invention not only improves work efficiency, but also reduces production cost and scrap rate, saves time and effort, high efficiency and energy saving, simple steps and convenient operation .

A self-driven seawater desalination device and method, relating to the field of seawater desalination and energy saving and emission reduction, the inlet section of the Venturi tube of the seawater desalination device is connected to the evaporator; the diffusion section of the Venturi tube is connected to the condenser through a pipeline; the inside of the evaporator A porous core is provided, and the porous core divides the inner cavity of the evaporator into an isolated seawater cavity and a steam cavity; a seawater channel is opened at the axis of the porous core; one end of the seawater channel communicates with the seawater cavity, and the seawater cavity communicates with the water inlet The other end of the seawater channel communicates with the water outlet through the pipeline; the head space of the seawater chamber is provided with a non-condensable air pipe, and the non-condensable air pipe communicates with the throat of the Venturi tube; when the seawater desalination device is running, the air pressure in the throat is less than The air pressure in the headspace of the seawater chamber; the hydraulic pressure in the seawater chamber is greater than the hydraulic pressure at the water outlet, and smaller than the hydraulic pressure at the water inlet. The invention does not need a supplementary water pump, a brine pump and a vacuum pump, realizes long-term operation without any pumping equipment, and achieves the purpose of seawater desalination.