31results about How to "Avoid direct destruction" patented technology

The invention discloses a method for restoring cadmium-contaminated farmland soil. The method comprises the specific steps that cadmium in the contaminated soil is transferred and removed through a chemical elution mode, a mixed water solution of ferric chloride and ammonium chloride is adopted as an eluting agent during chemical elution, the mass concentration of ferric chloride ranges from 0.8% to 2.0%, and the mass concentration of ammonium chloride ranges from 0.5% to 1.5%. Ferric chloride and ammonium chloride are compounded to serve as the eluting agent, the cadmium removal rate is high, and especially when the cadmium-contaminated farmland soil with the cadmium content smaller than or equal to 1.1 mg/kg is restored, the content of cadmium in the restored soil can conform to the secondary standard GB15618-1995. The environmental pollution risk of the cadmium-contaminated farmland soil is thoroughly eliminated, and safety production of agricultural products is ensured. In addition, the prepared eluting agent can effectively protect the integrity of the soil structure, and the probability that the restored soil can be used for farming is ensured.

The invention relates to an armor type protective cover comprising the following structures: a flexible organ shield comprising a folding, an inner side of the folding being supported by a plurality of support sheets, folding protrusions formed on fixedly connecting portions between the folding and the support sheets; an armor arranged on the top of the flexible organ shield and including a plurality of armor telescoping sheets, the armor telescoping sheets being mutually independent and respectively fixedly connected above an outer side of the folding from the folding protrusions; a mobile end plate fixing one end of the armor type protective cover on a mobile end of a machine tool guide rail; a fixed end plate fixing the other end of the armor type protective cover on a fixed end of the machine tool guide rail; at least one hairbrush fixedly connected with the mobile end plate of the armor type protective cover. The armor type protective cover can automatically clean the armor telescoping sheets in a protective cover telescoping process.

The invention discloses a mining automatic high-pressure flushing type camera device. The device comprises a base, a camera, a conical cover, a dust induction recognizer, a controller, a high-pressureairflow hose, a high-pressure water flow hose and a telescopic spray pipe mechanism, a camera lens on the left of the camera is positioned in the conical cover; a dustproof transparent assembly is arranged on the left of the camera lens. The dust induction recognizer is arranged in the conical cover and used for monitoring dust attached to the surface of the left side of the dustproof transparentassembly, the telescopic spray pipe mechanism is arranged at the top of the left side of the conical cover and can stretch out and draw back vertically, and the lower end of the telescopic spray pipemechanism is provided with an airflow sprayer and a water flow sprayer for spraying towards the dustproof transparent assembly. According to the invention, automatic induction is realized through thedust induction recognizer; cleaning is achieved by combining high-pressure water flow, air flow and other pressure intensities, the cleanliness of the dustproof glass can be effectively guaranteed, the high-pressure air flow can effectively achieve the effects of drying and water stain removing, and therefore the workload of manual wiping can be effectively reduced, damage to the camera lens is reduced, and the service life of the camera lens is prolonged.

The invention discloses a fabricated building wall body, and belongs to the field of fabricated buildings.The wall body comprises an anti-seismic assembly, an outer wall panel, and an inner wall panel, the outer wall panel and the inner wall panel are arranged parallel to each other and connected through a connection assembly, a mounting part used for mounting the anti-seismic assembly is arranged on the side surface of the side of the outer wall panel or/and an opposite side of the inner wall panel, the anti-seismic assembly is pressed between the outer wall panel and the inner wall panel by the outer wall panel and the inner wall panel through the connecting assembly, and the anti-seismic assembly is assembled by a plurality of wall block units and damper devices, the wall block unitsare distributed in a rectangular array in the plane of the wall body, one or more damper devicesarearranged between the adjacent two wall block units, and the mounting part is used for mounting and fixing one or more wall block units. According to the fabricated building wall body,the main structure of the wall body can be protected from damage during the action of external forces such as earthquakes, thus the collapse of a house is prevented, and stability and safety of a building are improved.

The invention discloses a normal-temperature cured conductive adhesive and a process method thereof for connecting rechargeable battery packs. The conductive adhesive is used for communicating rechargeable battery pack electrodes and reinforcing battery packs, and then the rechargeable battery pack electrodes and the battery packs can endure vibration and impact under use conditions. The normal-temperature cured conductive adhesive comprises an epoxy resin, an epoxy diluent, an epoxy curing agent, silicone aids and 30-90% by mass of silver powder of which D50 is greater than 7mu m. When being applied to connection and reinforcement of battery cathodes, the normal-temperature cured conductive adhesive disclosed by the invention can be called as a 'cathode cold welding' process, both the welding reliability of hot welding is maintained, and no external heat is needed in the welding process, direct damage or hidden damage of battery structures is avoided, and thus the properties of conductors are not affected by external heat.

The invention discloses a high-wave impedance self-restraint explosive welding method and device for a dissimilar metal composite pipe. The device is sequentially and concentrically provided with selectable outer constraint explosive, an outer mold, a selectable outer constraint layer, an outer pipe, an inter-pipe gap, an inner pipe, a selectable protection pipe, a pressure transmitting medium, a charging pipe, explosive welding explosive and a detonator from outside to inside. In the inter-pipe gap between the outer pipe and the inner pipe, the supporting and sealing structures are fixed at the two ends of the inter-pipe gap, so that the gap is kept uniform and sealed; wherein the external base body structure comprises an outer mold, an outer restraint layer and an outer pipe; the internal coating structure comprises an inner tube and a protective tube; the explosive welding cartridge comprises a charging tube and explosive welding explosive. By means of the method and device, distortion of the explosive welding pipe can be restrained, the straightness of the composite pipe can be improved, collision damage between an outer pipe and an outer mold is reduced, the adjustable and controllable range of welding parameters is widened, the risk of crack generation is greatly reduced, and the gap distance between all structures is accurately limited.

The invention relates to the technical field of civil engineering, and particularly discloses a perforated soil nail pull-out test device and a test method thereof. The perforated soil nail pull-out test device comprises an oil pressure pump pressurization system, a jack, a support component, a first extension piece and a first dialgage. The perforated soil nail pull-out test method includes the following steps that the perforated soil nail pull-out test device is assembled and is subjected to debugging and checking firstly, and normal operation of the test device is ensured; a small amount ofload is put, and then test pulling is conducted; a pull-out test is conducted according to designed grading load, and readings of a oil pressure gauge, the first dialgage and a second dialgage are recorded when operation is conducted; and data analysis and treatment is conducted according to recorded data. According to the test device, the structure is simple, use is convenient, and the test canbe carried out fast and easily; and the operation method is easy, and accuracy of results is high.

The invention discloses an ultraviolet disinfection money box which comprises a box body, a box cover and lock catches and is characterized in that the box cover is hinged to the upper portion of thebox body, the lock catches are installed on the left side and the right side of the front side wall of the box cover, and lock pieces matched with the lock catches are installed at the positions, corresponding to the lock catches, of the front side wall of the box body. Through conveying rollers and grinding rollers in a communicated groove, a single paper money enters an inlet groove along with the rotation of a first conveying roller and then subjected to high-temperature grinding treatment through a first grinding roller and a second grinding roller, the paper money is subjected to high-temperature disinfection during ironing, the initial speed is given through the speed regulation of the second conveying roller, so that the paper money moves to the lower side of a certain money clip, in the moving process of the paper money, the upper and lower groups of ultraviolet lamp strips in the inner cavity of the box body disinfect the upper and lower surfaces of the paper money, ultraviolet rays have no irradiation shadows, are uniformly radiated on the paper money, cooperate with the grinding rollers for high-temperature disinfection, avoid incomplete disinfection, improve the disinfection effect, and are suitable for wide popularization and application.

The invention discloses an automotive safety air curtain, which comprises an inflatable airbag for providing lateral protection and a gas generating device for inflating the airbag; the airbag is provided with an inflating part axially connected with the gas generating device; the inflating part comprises an outer layer made of textile material and fixed on the airbag by sewing, and a gas guide part which is in gas communication with the inflating part and guides the inflating gas into the airbag in the longitudinal direction; and the gas generating device is a firework type gas generating device. The inflating part of the air curtain is also provided with an inner layer which encircles the gas outlet of the gas generating device, the inner layer encircles the gas outlet at the upper middle part of the gas generating device, and a gas passage communicated with the gas guide part is formed at the lower gas outlet. The air curtain has the characteristics of light weight, short corresponding time and convenience for installation and fixation.

The invention discloses a hydropower station surge chamber non-welding sealing tool and an installation method thereof, and belongs to the technical field of hydropower station metal structures. The hydropower station surge chamber non-welding sealing tool comprises a sealing blocking plate and a plurality of first tensioning lifting lugs. An annular groove is formed in the lower surface of the sealing blocking plate, and a sealing water stop device is arranged in the annular groove. The lower surface of the sealing blocking plate is fixedly connected with a plurality of second tensioning lifting lugs, and the first tensioning lifting lugs and the second tensioning lifting lugs are connected with inhaul cable devices. When the hydropower station surge chamber non-welding sealing tool is inuse, the sealing water stop device is in close contact with a pipe orifice of a middle connecting pipe in a surge chamber in the circumferential direction, and the plurality of first tensioning lifting lugs are fixedly connected with the inner wall of a middle connecting pipe adjusting joint. Under the condition of no welding, the space between a main air chamber of the surge chamber and the connecting pipe is sealed, so that the surge chamber forms a closed space, and the hydrostatic test requirement of the air cushion type surge chamber is met.

The present invention relates to a security device (1) for securing a handle (7) to a clasp (8) so as to prevent operation of said handle (2), the security device comprising a first housing having a bolt (4) extending therefrom and a second housing (3) comprising retaining means (5) for receiving and retaining a distal end of the bolt to secure the first and second housings together; in a first state the first and second housings being separate from each other and separate from said handle to which the security device is to be secured; the first and second housings being assemblable into a second state in which the first and second housings are secured together by means of engagement of the bolt with the retaining means, wherein, in use, in the second state the security device may enclose at least a portion of said handle within an interior of the security device and wherein the bolt may pass through an aperture in the handle and an aperture in the clasp; wherein, in use, in the second state the second housing shrouds the retaining means and wherein, in use, in the second state the first and second housings shroud the clasp.

The invention discloses a multi-pole buffering receiving machine for anode vertical formworks, and particularly relates to the technical field of lead electrolytic smelting equipment. The multi-pole buffering receiving machine for the anode vertical formworks comprises a rack; a supporting plate is rotationally connected onto the rack; two first chain wheels arranged in a spaced manner are rotationally connected onto the supporting plate; the two first chain wheels are coated with a first chain; a support is further arranged on the supporting plate; a baffle parallel with the supporting plateis arranged on the support; a buffering mechanism detachably connected with the first chain is arranged on the baffle; the buffering mechanism is glidingly connected onto the baffle; buffering force unloading can be performed on anode plates by the aid of the buffering mechanism; a second chain wheel is further rotationally connected onto the baffle; the second chain wheel and any first chain wheel are coated with a second chain; and a hydraulic motor is further arranged on the second chain wheel. With the adoption of the technical scheme, the problems that existing anode plate receiving buffering devices cause potential safety hazards easily and are disadvantageous to subsequent processing are solved, and the multi-pole buffering receiving machine can be applied to receiving and conveyingof the anode plates.

The invention discloses an operating device of a three-station knife switch and the three-station knife switch, and the operating device of the three-station knife switch comprises a mounting bracket, a driving shaft, a locking sheet, a locking shaft and a locking mechanism. The driving shaft is movably mounted on the mounting bracket; the locking piece is fixedly connected with the driving shaft, and the locking piece is correspondingly provided with a connection locking position, an isolation locking position and a grounding locking position; the locking shaft is mounted on the mounting bracket, moves relative to the mounting bracket and is provided with a first locking position for locking the connection locking position, the isolation locking position and the grounding locking position on the locking sheet and a first unlocking position for unlocking the connection locking position, the isolation locking position and the grounding locking position on the locking sheet; the locking mechanism is installed on the installation support, locks the locking shaft when the locking shaft is located at the first locking position, and unlocks the locking shaft, so that the locking shaft is driven by the locking piece to move to the first unlocking position. Through the arrangement, the locking piece can be prevented from being blocked by the locking mechanism.

The invention discloses a gas detector having a waterproof grade, which comprises a detector body and a cover, wherein the detector body comprises a mounting base in which a sensing element is disposed, the mounting base is provided an inlet for a gas to be detected, the inlet defines an axis direction; and the cover has a circumferential wall defines an enclosing space inside the cover, the enclosing space has a proximal end and a distal end in the axial direction, the cover is attached to the mounting base such that the proximal end of the enclosing space is located near the inlet, a plurality of shutter elements are attached to the circumferential wall, each of the plurality of shutter elements is configured to form a passage through which a water flow passes between an exterior of thecover and the enclosing space and extends toward the distal end.