43results about How to "Prevent sand leakage" patented technology

The invention relates to the technical field of sand spreading devices for 3D printing, and relates to a vibration sand discharging device for a 3D printer and a vibration sand spreading debugging method thereof. The vibration sand discharging device for 3D printing comprises a sand hopper, and a sand bin is arranged above the sand hopper; a spiral stirring wheel is arranged in the sand bin, and the top of the sand bin is provided with a stirring wheel motor and a sand supply opening; a sand outlet with a fixed width is formed below the sand hopper in the length direction; the cross section, perpendicular to the length direction, of the sand hopper on the upper side of the sand outlet is in a V shape; a self-leakage-stopping sand discharging device is arranged in the sand hopper above thesand outlet, sliding rails are symmetrically arranged on the two outer walls of the outer side of the sand hopper in the length direction respectively, a plurality of sliding blocks are arranged on the sliding rails respectively, and a vibration air cylinder is connected to the sliding blocks; the lower side of the sand outlet is connected with a sand scraping plate. After the vibration air cylinder stops vibrating, the self-leakage-stopping sand discharging device stops sand flowing to the sand discharging opening. The sand discharging structure can be used for uniformly spreading sand in thelength direction when sand spreading is carried out, and self sand stopping can be effectively achieved after vibration is stopped.

The invention discloses a sand jet nozzle used for a cold-box core shooter. The sand jet nozzle comprises a sand jet plate and a sand outlet nozzle. A hole is formed in the middle portion of the sand jet plate. The sand outlet nozzle is installed in the hole. The sand jet nozzle is characterized in that the sand outlet nozzle is detachably installed in the hole; and a fixing part is arranged on the lower portion of the sand jet plate and can fix the height, in the hole, of the sand outlet nozzle. By means of the structure that the sand outlet nozzle can be freely detached on the sand jet plate, free replacement can be conducted for molds of different specifications, and the application range is widened; and a thread is arranged in the hole in the sand jet plate, leakproofness is greatly improved compared with a traditional technology, foundry sand is prevented from leaking at the position of the hole gap between the sand outlet nozzle and the sand jet plate, and the sand-leakage-prevention technical effect is achieved.

The invention provides a 3D printer leakproof working cylinder. The 3D printer leakproof working cylinder comprises a first cylinder wall, a second cylinder wall, a first side plate, a second side plate, positioning rods and a piston plate; a rectangular channel structure is jointly defined by the first cylinder wall, the second cylinder wall, the first side plate and the second side plate; the first cylinder wall and the second cylinder wall are cooperatively connected through grooves in the first side plate and the second side plate; the first side plate and the second side plate are fastened and connected through the positioning rods; the piston plate slides in the rectangular channel; and the first cylinder wall and the second cylinder wall are made of glass or resin. The problems that3D printer working cylinders are insufficient in strength, and sand is prone to leaking are solved, the 3D printer leakproof working cylinder is convenient to dismount, mount and maintain and has good application prospects, on the basis of superior performance than original metal cutting machining, the cost is greatly reduced, the corrosion resistance is significantly improved, the especially inapplication of a large-sized piston cylinder blocks, the flatness of a whole board cannot be ensured by metal cutting machining easily, and the 3D printer leakproof working cylinder can be widely popularized in similar application.

The invention discloses a leakage-preventing compensation type reverse sand washing device and a use method. The device comprises a central tube; the outer side of the central tube is sleeved with a connecting cylinder sleeve and an outer tube part; liquid inlets are formed in the top of the outer tube part; a packer part is arranged on the outer wall of the connecting cylinder sleeve; the bottomof the central tube can be glidingly sleeved with an inner sand-guiding sliding cylinder sleeve; a conical tube part with the diameter gradually increased from top to bottom is arranged at the bottomof the inner sand-guiding sliding cylinder sleeve; a liquid spraying hole is formed in the side wall of the conical tube part in a penetrating manner; the bottom of the connecting cylinder sleeve canbe glidingly sleeved with an outer sand-guiding sliding cylinder sleeve; the bottom of the conical tube part is connected with the inner wall of the outer sand-guiding sliding cylinder sleeve in a sealed and abutted manner; and the inner sand-guiding sliding cylinder sleeve and the outer sand-guiding sliding cylinder sleeve form sand-guiding double sliding cylinder sleeves. According to the deviceand the use method, formation sand in a shaft can be washed to the ground, by the aid of the compensation design of the sand-guiding double sliding cylinder sleeves, the formation sand is in the controllable range during sand washing, a sand washing liquid is prevented from being leaked into the oil layer, and the working cycle of an oil well is prolonged.

The invention discloses a sand shooting device of a cold core box core shooting machine. The sand shooting device comprises the cold core box core shooting machine and a die, wherein the cold core box core shooting machine comprises a core shooting machine body, a sand shooting cylinder and a sand shooting outlet part, the sand shooting outlet part is provided with transverse hole in the bottom-end lateral side, the die is provided with a horizontal sand inlet and a vertical hole capable of accommodating the sand shooting outlet part, and the horizontal sand inlet is connected with the bottom-end lateral hole of the sand shooting outlet part. The sand shooting device has the advantages that the casting sand direction during sand shooting is changed from a traditional vertical direction into a horizontal direction, insufficient sand shooting caused by the blocking of the sand shooting outlet part in the vertical direction can be avoided effectively, sand leakage due to the gravity of the casting sand when the sand shooting outlet part is inserted into of taken out of the die can be avoided at the same time, and the sand shoot structure is little in die scouring abrasion and beneficial to die inner frame filling.

In view of the problem that the oil content, suspended solid content, salt content and organic matter content of the steel industry wastewater are high, a combined process involving a grid, an oil separation grit chamber, a primary sedimentation tank, a biological contact oxidation tank, an efficient sedimentation tank, a V-shaped filter tank, an ultraviolet disinfection tank, a siphon filter tank, ultrafiltration and two-stage reverse osmosis is adopted, so that pollutants in the wastewater can be effectively degraded, the wastewater reuse rate can be increased, the use amount of new water inthe iron and steel industry is reduced, the investment cost of an enterprise is saved, and remarkable environmental benefits and economic benefits are achieved.

The invention discloses a heat-insulating energy-saving building block utilizing industrial waste. The heat-insulating energy-saving building block is composed of a base material 1, a blind hole 2, a blind hole 3 and a through hole 4, and the base material is composed of the industrial waste such as furnace slag and pulverized coal ash, building waste and cement according to a certain proportion and produced through hydraulic forming. Mechanical performance, heat insulativity, material consumption and building convenience of the building block are integrated, and optimized hole ratio is 45-60%. Internal hole type is optimized by reasonably matching the blind holes with the through hole, so that the heat path is enabled to be more uniform, cold-heat bridge during heat transfer of the building block is blocked, and heat insulativity of the building block is improved greatly. The building block can serve as a hollow building bock to be used solely and can be composited with a heat-insulating material for use, so that heat insulativity of the building block is further improved. The heat-insulating material which is filled can be an inorganic material such as foamed concrete and can also be an organic material such as EPS and XPS, and energy-saving designing standard requirements can be met without taking other heat-insulating measures on a built wall. The heat-insulating energy-saving building block has the advantages of high heat insulativity, building material saving, high mechanical strength, service life identical with a building and convenience in construction.

The invention provides a gravity-type automatic back-flushing filter apparatus. It is characterized in that the gravity-type automatic back-flushing filter apparatus comprises a cavity, and a filter plate, which is arranged in the cavity and separates the cavity into an upper part and a lower part. The cavity comprises a water inlet, a sludge outlet, and water outlet. The water inlet and the sludge outlet are arranged below the filter plate. The water outlet is arranged above the filter plate. The filter plate comprises a filter layer formed by curing silica sand and/or coated silica sand with a binder. The filter layer has a thickness of 2-5 mm. The inventive gravity-type automatic back-flushing filter apparatus can be easily cleaned during the back-flushing process, and is suitable for long-period use. Compared with the filter layer formed by natural piling of bulk sand, the filter layer according to the invention has lower silica sand consumption and better filtration quality, and no sand leakage during back-flushing. The gravity-type automatic back-flushing filter apparatus can be used in the fields of domestic wastewater treatment and micro-polluted water source treatment.

The invention relates to a check valve sand supply device of a sand ejector. The check valve sand supply device comprises a sand hopper, a valve body, an upper valve seat, a lower valve seat, a box body, an iron box, a pneumatic switch, a first conveying air pipe and a second conveying air pipe, wherein a hollow valve cavity is formed in the valve body, a limiting plate is arranged in the valve cavity, the limiting plate is provided with a circular ball valve, the upper valve seat and the lower valve seat are respectively provided with a sand flow hole, the sand hopper is fixed on the upper valve seat, the bottom of the sand hopper is provided with a sand inlet, the box body is fixed below the lower valve seat, a sand ejection passage is formed in the box body, the first conveying air pipe is connected and communicated with the sand ejection passage, the second conveying air pipe is connected and communicated with the bottom of the valve cavity, and the iron box is arranged below the box body. According to the check valve sand supply device, the circular ball valve is controlled by a pneumatic device to be switched on or off, the accurate reciprocating work state of a valve core is guaranteed, the valve core is relatively reliable to reset, the malfunction rate of the check valve is greatly reduced, the reliability of the check valve is improved, the sand leakage defect of a traditional plugboard sand supply device can be solved, and the operating environment can be greatly improved.

The invention relates to an energy-saving and environment-friendly monitoring equipment based on underground water investigation. The energy-saving and environment-friendly monitoring equipment comprises a floating block and a sampling assembly, a liquid level sensor is installed at the right end of the floating block, sealing assemblies are installed on the front side and the rear side of a first counterweight balance assembly, and water flow velocity detection assemblies are arranged on the front side and the rear side of the floating block. The sampling assembly is located at the lower end of the floating block, a control assembly is arranged on the left side of the sampling assembly, and a lifting adjusting assembly is arranged on the left side of the floating block. The energy-saving and environment-friendly monitoring equipment based on underground water investigation has the beneficial effects that the energy-saving and environment-friendly monitoring equipment based on underground water investigation has a counterweight adjusting function and an accurate flow velocity detection function, and can stably stay at a specified position of a water surface, so that the accurate detection of the equipment can be improved, water at different depths can be sampled when the equipment is used for sampling, meanwhile, water at other depths can be prevented from polluting sampled water, and whether the equipment reaches the bottom of underground water or not can be accurately detected during depth measuring of the equipment.

The invention relates to the technical field of metal and non-metal mine tailing pond flood drainage systems, in particular to a tailing pond transition flood drainage method and system. The tailing pond transition flood drainage system comprises a reinforced concrete well seat, a prefabricated arc-shaped steel plate with a groove, an I-shaped steel stand column and a shaft; the reinforced concrete well seat is connected with a lower horizontal drainage pipe, the prefabricated arc-shaped steel plate is embedded in the reinforced concrete well seat, and the I-shaped steel stand column penetrates through the groove of the prefabricated arc-shaped steel plate and is embedded into the reinforced concrete well seat; the shaft is formed by sequentially splicing and stacking arc-shaped steel arch rings up and down, and the arc-shaped steel arch rings are formed by splicing arc-shaped steel arch plates left and right. Compared with the prior art, the tailing pond transition flood drainage method and system have the beneficial effects that operation is easy, the system can be rapidly built and put into use in a short time, and flood control safety of a tailing pond is guaranteed.

The invention relates to the technical field of sanding, in particular to a grinding device and sanding equipment. The technical problem that in the prior art, the sanding force of a manual sanding machine cannot be effectively controlled is solved. The grinding device comprises a grinding mechanism and a pressure control mechanism, wherein the grinding mechanism is used for performing grinding operation on a to-be-ground surface; and the pressure control mechanism is connected with the grinding mechanism and comprises a compression spring, and the compression spring is pre-compressed for a distance of travel so as to make the grinding mechanism always have the elastic force for flexibly adjusting the sanding force. By means of the technical scheme provided by the invention, the sanding force can be automatically adjusted according to the unevenness and the depth of the to-be-sanded surface, and the problem of sanding omission and excessive sanding is effectively avoided.