37results about How to "No volume" patented technology

The invention discloses a multifunctional arc-free switch and a measure for achieving arc-free closing and opening, belongs to industrial electric control devices, and particularly relates to a circuit control switch and a method for achieving functions of the switch. Through novel line structure composition, arc-free closing and opening of the switch are achieved when the switch runs, arc discharge is prevented from being generated, and dangers caused by arc discharge is avoided. The multifunctional arc-free switch is formed by a main contact, an integrated control unit, an auxiliary contact and a coil. When the coil is powered on, the integrated control unit is connected firstly, currents of a main circuit pass through the integrated control unit, at the moment, no current passes through the main contact, then the main contact is closed in an arc-free mode, the main contact supplies electricity to a load, the integrated control unit is disconnected automatically, and arc-free closing of the switch is achieved. After the switch stops running, the coil is powered off, the integrated control unit is connected while the main contact starts to be opened, no current passes through the main contact, the main contact is opened immediately, then the integrated control unit is disconnected, no current passes through the main contact when the main contact is opened, and therefore arc-free opening of the switch is achieved. The multifunctional arc-free switch and the measure for achieving arc-free closing and opening are used for control circuits of a circuit system.

The invention provides a method for preparing anti-stick casting sand, wherein the raw materials include montmorillonite powder, aluminum silicate cotton and ordinary molding sand, and the weight composition of each component is 5-10 parts of montmorillonite powder, 5-15 parts of aluminum silicate cotton , 70-100 parts of ordinary molding sand, preparation method: mix evenly according to the formula ratio. Compared with the prior art, the preparation method of the anti-stick casting sand of the present invention has the advantages of wide source of raw materials, simple processing technology, low cost, small burning volume, strong reusability, almost no gas generation, environmental protection, good anti-stick effect, It has the characteristics of superior process performance, etc., and has good economic benefits and promotion and use value.

The invention discloses a wind-speed and wind-direction sensor which comprises a base plate (1), a resistance layer (2) arranged on the base plate (1), a first electrode (31), a second electrode (32), a third electrode (33), a fourth electrode (34), a top plate (5), a support rod (4), a capacitive electrode (6), a wind sensitive rod (7) and a lead (8), wherein the first electrode (31), the second electrode (32), the third electrode (33) and the fourth electrode (34) are respectively arranged on the resistance layer (2) and are not interconnected; the top plate (5) is arranged opposite to the base plate (1) and is away from the base plate (1) for a certain distance; the support rod (4) is used for connecting the base plate (1) with the top plate (5); the capacitive electrode (6) is arranged on the top plate (5); the wind sensitive rod (7) is arranged between the base plate (1) and the top plate (5); the lead (8) is arranged on the top plate (5); the wind sensitive rod (7) comprises a fixing end and a free end opposite to the fixing end; the free end and the fixing end of the wind sensitive rod (7) are respectively connected with the base plate (1) and the top plate (5); the wind sensitive rod (7) has no contact with the resistance layer (2); and the free end of the wind sensitive rod (7) and the resistance layer (2) form a capacitive structure. The wind-speed and wind-direction sensor disclosed by the invention has the advantages of simplicity in mounting, convertible measuring range, low power consumption, small size, small temperature drift and the like.

An integrated spectral detector with miniature Fabry-Perot cavity array has lighting system, photoelectric detector array and miniature Fabry-Perot cavity array between them. Said Fabry-Perot cavity array is composed of the cavities and the reflecting membranes coated on both sides. Each cavity length is correspondent to a particular wavelength. The parallel light beams pass through said cavity array to generate relative electric spectrum signals on the photoelectric detector array. After computer processing, a spectrogram is obtained. Its advantages are high light flux, sensitivity and resolution, small size and low cost.

The invention relates to a breast pad without a gap in the water-absorbing layer and a production method thereof. The breast pad comprises: a water-conducting layer, a water-absorbing body and a waterproof layer stacked in sequence; there is no gap in the water-absorbing body, and the breast pad moves inward along its center line Fold in half and shape so that the breast pad forms a substantially conical or hemispherical cavity when unfolded. During production, the breast pad is folded inward along the center line, so that the water-conducting layers form adjacent laminates, and the laminated water-conducting layers are connected along one or two lines, so that when the breast pad is unfolded, it forms a basic The tapered cavity eliminates the need to set cuts on the water-absorbing layer, so that the volume of the water-absorbing layer of the breast pad is not lost, thereby increasing the water absorption of the water-absorbing layer, which can reduce the frequency of breast pad replacement and use costs for users.