1750 results about "Pressure pipe" patented technology

The utility model relates to the technical field of gas extraction, in particular to an underground gas extraction blowout preventer, and mainly solves the technical problems that the existing gas extraction blowout preventer is high in spewing control difficulty, high in safety risk and high in sprayed slag cleaning workload. The device comprises a movable chassis, a deslagging box, a multi-way pipe, a drilling machine through pipe, a coal seam drilling pipe, a negative pressure pipe, a pressure relief buffer cover, a deslagging pipe and a pressure sensor. According to the device, gushing is detected through the pressure sensor, on-off of the negative pressure pipe and the slag discharging pipe is controlled in a feedback mode, dependence on manual experience is not needed, it can be guaranteed that gushing and corresponding equipment are started consistently, and the gushing control difficulty is greatly reduced; meanwhile, water and residual materials for slag spraying can be discharged into the slag discharging box through the slag discharging pipe in time to be collected, and the workload of slag spraying and cleaning is reduced; the device is further provided with a pressure relief buffer cover, when the pressure is too large due to gushing, buffering can be conducted through the pressure relief buffer cover, and damage to the device caused by the too large pressure is avoided.

The invention discloses a novel washout-corrosion-resistant waste heat recovery heat exchanger, and aims to solve the problem of washout corrosion of high-temperature and high-speed dust-containing flue gas to the heat exchanger. The heat exchanger comprises an upper shell, a lower shell, an integrated side plate box, heat exchange tubes, a discharge outlet, interception fins and the like. The heat exchange pipes are distributed in a multi-group array mode, and smoke impact is reduced through a smooth surface and a dense structure. The inverted-V-shaped intercepting fin plate is located above the discharge outlet and can intercept particles in the flue gas and recycle the particles through the negative pressure pipe. The whole device adopts a multi-channel structure to guarantee the flue gas treatment and flowing efficiency. The heat exchanger can reduce erosive wear, prolong the service life of equipment, stably recover waste heat and guarantee smooth proceeding of subsequent processes, is suitable for high-temperature dust-containing flue gas scenes such as an aluminum melting furnace, and is energy-saving and environment-friendly.

The invention relates to the technical field of pipeline installation, and particularly discloses a super high-rise high-pressure pipeline installation structure which comprises a high-pressure pipe set, the high-pressure pipe set is composed of a right-angle bent pipe and two straight pipes connected with the two ends of the right-angle bent pipe respectively, and annular flanges are arranged on the outer sides of the joints of the right-angle bent pipe and the straight pipes. Sealing connecting parts used for connecting the connecting position of the right-angle bent pipe and the straight pipe and conducting multi-stage sealing on the connecting position are arranged at the connecting position of the right-angle bent pipe and the straight pipe, and a triangular reinforcing part used for conducting triangular reinforcing, locking and fixing on the two sealing connecting parts is arranged between the two sealing connecting parts. Different from a traditional mode that only a single sealing ring is arranged in a sleeved mode, a tight multi-stage sealing system is constructed by arranging the sealing connecting part and the triangular reinforcing part in a matched mode, when a high-pressure pipe set is connected, the first sealing ring fills a gap in the connecting position of the straight pipe and the right-angle bent pipe, primary sealing is achieved, and leakage of a high-pressure medium is effectively blocked.

The embodiment of the utility model provides mural degerming equipment, which relates to the technical field of cultural relic protection, is used for being matched with a cleaning soft brush for use, and comprises a box body, a vacuum pump, a purification mechanism and a negative pressure pipe. The vacuum pump, the purification mechanism and the negative pressure pipe are all installed in the box body, the negative pressure pipe communicates with the vacuum pump through the box body, and the vacuum pump is used for generating negative pressure in a pipe cavity of the negative pressure pipe. The negative pressure pipe is provided with an adsorption end located outside the box body, and the adsorption end is used for facing the mural body to form a negative pressure area on the mural body. And the purification mechanism is used for purifying gas sucked through the adsorption end. By means of the design of the device, diffusion and propagation of bacterial colonies in the cultural relic cleaning process can be reduced, pollution to the environment is reduced, and the adverse effect on the health of operators during cultural relic maintenance is reduced.

The invention relates to the technical field of pumped storage power station water diversion systems, and discloses a method and device for determining a pressure pipeline reinforcement ultra-high performance concrete lining structure. The method comprises the steps that internal pressure information, radius information and lining thickness information of a target water channel, the design tensile strength of a tensile steel bar, the tensile stress borne by ultra-high performance concrete and the lining section area per unit length are obtained; calculating circumferential stress information of the target water channel based on the internal pressure information and the radius information; based on the circumferential stress information and the lining thickness information, the tensile force resultant force of the lining section in unit length is determined; determining the total sectional area of the tensile steel bars based on the tensile resultant force of the section of the lining in unit length, the designed tensile strength of the tensile steel bars, the tensile stress of the ultra-high performance concrete and the section area of the lining in unit length; determining the number of to-be-assembled reinforcements based on the total sectional area of the tensile reinforcements; and the pressure pipeline reinforcement ultra-high performance concrete lining structure is determined based on the number of the to-be-assembled steel bars and a preset steel bar arrangement rule.

The utility model belongs to the field of mold preheating, and provides a full-automatic mold preheating machine which comprises a flame nozzle, an oil tank, an oil conveying pipe, an air compressor, a main air pipe, a negative pressure generator, a negative pressure pipe, a first electromagnetic valve, an oil suction pipe and a control panel. The oil conveying pipe communicates with the oil tank and the flame nozzle; one end of the main air pipe is communicated with the air compressor, and the other end of the main air pipe forms a first branch air pipe and a second branch air pipe which are connected in parallel; an air inlet and an air outlet which are coaxially arranged are formed in the negative pressure generator, a bypass opening communicated with an air channel between the air inlet and the air outlet is further formed, the air inlet is further communicated with the second branch air pipe, and the air outlet is communicated with the external atmosphere; the negative-pressure pipe communicates with the top of the oil tank and the bypass opening. The first electromagnetic valve is mounted on the second branch air pipe; the other end of the oil suction pipe is a free end; the control panel is in communication connection with the air compressor and the first electromagnetic valve.

The utility model discloses a power transmission low-pulsation peristaltic pump, which is characterized in that converging or shunting of an elastic hose is realized by utilizing a three-way pipe joint, a rotating mechanism is horizontally arranged on two sides of the elastic hose and is connected with a driving mechanism, and a plurality of groups of roller pressure pipe components are alternately and uniformly distributed on the rotating mechanism; the driving mechanism drives the rotating mechanism to drive the roller pipe pressing assembly to rotate; when the distance that the rollers on the two sides of the first elastic hose extrude the hose reaches L, the rollers on the two sides of the second elastic hose begin to extrude the hose; when the extrusion distance of the second elastic hose reaches L, the rollers on the two sides of the first elastic hose loosen the hose, then a new round of extrusion begins, and when the extrusion distance reaches L, the second elastic hose begins to conduct a new round of extrusion; and the two groups of elastic hoses are alternately extruded by circulating dislocation. The peristaltic pump solves the problem that fluid is polluted due to the fact that the inner wall of a hose in an existing peristaltic pump is seriously abraded and a large number of particles are generated, and pulsation during liquid transmission is effectively reduced.

The utility model relates to the technical field of pipeline detectors, in particular to a novel pressure pipeline crawling detector which comprises a rack, a clamping mechanism is installed on the surface of the rack and comprises a first electric telescopic rod and a gear ring, a turnover adjusting mechanism is installed on the surface of the first electric telescopic rod, and the gear ring is installed on the surface of the turnover adjusting mechanism. The inner wall of the gear ring is fixedly connected with a second electric telescopic rod. The device is buckled on the surface of a pipeline, a second electric telescopic rod is controlled to extend to enable a U-shaped plate and a roller to move, the surface of the roller makes close contact with the surface of the pipeline, a fourth motor and a third motor are controlled to operate, a rotating shaft of the fourth motor rotates to drive the roller to rotate to crawl on the surface of the pipeline, and the third motor rotates to enable a second gear to rotate. Due to the fact that the sliding block is meshed with the gear ring, the sliding block rotates and moves on the surface of the gear ring in a reciprocating mode, then the fixing block, the square rod, the square block and the detector rotate and move in a reciprocating mode, and therefore the pipeline detection device has the advantage of being capable of detecting a pipeline in the crawling process.

The invention belongs to the field of mechanical arms, and particularly relates to a production conveying line grabbing mechanical arm and a grabbing method thereof.The production conveying line grabbing mechanical arm comprises a main connecting arm, the main connecting arm is provided with three connecting pieces capable of being disassembled and assembled to change positions, the connecting piece located in the middle is provided with a T-shaped limiting plate, and the other two connecting pieces are each provided with an adsorption mechanism. The adsorption mechanism comprises a first rotating assembly connected with the connecting piece, a second rotating assembly is arranged on the first rotating assembly, two telescopic plates are arranged on the second rotating assembly, suction cup assemblies are arranged at the positions, away from the first rotating assembly, of the two telescopic plates, and a limiting piece is arranged between the two telescopic plates. The suction cup assembly comprises a negative pressure pipe connected with the telescopic plate. The suction position of the suction cup assembly can be changed according to the shape of the material piece, the material piece grabbing applicability is improved, and the problem that when the material piece is shaken and bent, air leakage occurs to the suction cup, and consequently the material piece falls can be effectively solved.

The utility model provides an insulation paper winding device, which relates to the field of insulation paper winding and comprises an insulation paper winding frame and a winding drum, two groups of conveying rollers are coupled to the inner side of the insulation paper winding frame, the winding drum is mounted on the right side of the insulation paper winding frame through a connecting frame, a stop plate is arranged right above the conveying rollers, and the stop plate is mounted on the right side of the insulation paper winding frame. Hydraulic columns are connected to the front side and the rear side of the stopping plate through fixing plates, a rubber pad is bonded to the lower surface of the stopping plate, an adsorption hole is formed in the surface of the rubber pad, the upper end of the adsorption hole communicates with a negative pressure pipe through a negative pressure cavity, and tension adjusting rollers are arranged between the conveying rollers; the front side and the rear side of the tension adjusting roller are connected with the insulation paper winding rack through guide shafts. The problem that in the prior art, due to the fact that one end of wound insulation paper is accidentally loosened, the insulation paper is separated from the surface of the transmission unit, and loosening and separation of the insulation paper are difficult to effectively prevent is solved.

The invention belongs to the technical field of medical drainage, and discloses a pressure self-adjusting drainage device which comprises a drainage water seal bottle and an inclined anti-dew mechanism. The inclined anti-dew mechanism is arranged on the drainage water seal bottle; the drainage water seal bottle comprises a bottle body, a liquid collecting cavity, a water seal cavity and a negative pressure control cavity are formed in the bottle body, a drainage pipe capable of being communicated with the liquid collecting cavity is arranged on the bottle body, a water seal pipe is fixedly communicated with the interior of the water seal cavity, a communicating pipe is communicated between the liquid collecting cavity and the water seal pipe, an air breather pipe is fixedly communicated with the interior of the negative pressure control cavity, and the air breather pipe is communicated with the negative pressure control cavity. The bottle body is communicated with a negative pressure pipe which can be communicated with the negative pressure control cavity; the inclined anti-dew mechanism comprises a fixing sleeve. By means of the design, the situation that pneumothorax is developed into open pneumothorax due to the fact that the end of the water sealing pipe is exposed can be avoided, then the sealing performance of the drainage device is guaranteed, air backflow is avoided, and meanwhile it is guaranteed that the drainage device can normally work in an inclined state.

A system for cleaning boiler dust pollution of a fossil-fuel power station, which relates to the technical field of dust cleaning. The system comprises: a dust collection hood (2), which covers a dust leakage part of a boiler body (1); a negative-pressure pipe (3), one end of which is in communication with the dust collection hood (2), and the other end of which is in communication with a dust storage bin, wherein a variable-frequency negative-pressure fan (16) is mounted on the negative-pressure pipe (3); a filter screen plate (4), which is mounted in the dust collection hood (2) and can block large-particle dust from entering the negative-pressure pipe (3); and a cleaning mechanism which is arranged in the dust collection hood (2) and can regularly clean dust adhering to the filter screen plate (4). The cleaning mechanism comprises a monitoring assembly and an execution assembly configured to clean dust off of the filter screen plate, wherein the monitoring assembly is movably arranged in the dust collection hood (2), and can monitor dust concentrations on two sides of the filter screen plate (4) in real time; the negative-pressure fan (16) and the execution assembly are both in electrically controlled connection with the monitoring assembly; and, on the basis of the measured dust concentrations on the two sides of the filter screen plate (4), the monitoring assembly can drive the execution assembly to start and stop and regulate and control the power of the negative-pressure fan (16).

The invention belongs to the technical field of in-service inspection of pressure pipes, and discloses an anti-torsion long-stroke multistage sealing telescopic structure which comprises a main cable driving guide assembly and a rigid chain driving assembly which are connected, the rigid chain driving assembly is installed at one end of a support guide rail assembly, and a rigid chain library is arranged below the support guide rail assembly. A rigid chain is arranged in the rigid chain library, the multi-stage telescopic sleeve is arranged on the support guide rail assembly in a penetrating mode, the front end of the rigid chain is connected with the tail end of the multi-stage telescopic sleeve, and the rigid chain driving assembly drives the rigid chain to move so as to drive the multi-stage telescopic sleeve to retract and expand. The in-service inspection of the CANDU nuclear reactor pressure pipe can be realized, the driving stroke is long, the circumferential torsional rigidity is enough, the sealing performance is realized, the inspection tool is continuously pushed forwards, the stroke range of the inspection tool covers the whole length of the pressure pipe, and in the inspection execution process, each sealing part of each stage of telescopic component does not generate visible leakage.

The invention discloses a multifunctional high-pressure pipeline full-scale model internal pressure test loading system which comprises a counter-force pier column, N synchronous jacks and N loading modules. The cross section of the counter-force pier column is a regular N-polygon ring; one end of each synchronous jack in the force application direction is connected to one outer side surface of the counter-force pier column, and the other end of each synchronous jack is connected with one end of one loading module; the other end of the loading module faces the inner wall of the high-pressure pipeline; and the loading system applies a radial load to the loading module and transmits the radial load to the high-pressure pipeline to carry out a loading test. Different working conditions of the high-pressure pipeline are simulated by adopting the equivalent load, the stress mechanism research of the full-scale model in the whole test loading process can be realized, and the quality and efficiency of the prototype test of the high-pressure pipeline are improved. The loading module can further comprise a plurality of double-web type steel base plates, the adjacent base plates are connected through high-strength bolts so as to meet the use requirements of pressure pipelines of different sizes, and the loading module has the advantages of being flexible in design, wide in applicability and the like.

A piston pump for a high-pressure cleaning device is provided, having a pump housing, which includes a first housing part and a second housing part. The first housing part forms a suction conduit and a pressure conduit, and the second housing part forms a plurality of pump chambers into each of which a reciprocally movable piston dips and which are each in flow connection with the suction conduit by way of an inlet channel and with the pressure conduit by way of an outlet channel. The inlet channel can be closed by an inlet valve and the outlet channel can be closed by an outlet valve. The second housing part includes a valve receptacle, and that the piston pump includes an outlet valve assembly, wherein the outlet valve assembly comprises an outlet part, which is inserted into the valve receptacle and forms all outlet valve seats.

The utility model discloses reverse osmosis equipment for recycling reclaimed water, which comprises a treatment unit, the treatment unit comprises a base, a high-pressure pump and a connecting frame, the high-pressure pump and the connecting frame are fixedly connected to the top of the base, the outer wall of the high-pressure pump is fixedly communicated with a high-pressure pipe, and the treatment unit further comprises a treatment assembly for pretreating the reclaimed water and a reverse osmosis unit, the membrane shell is fixedly connected to the inner wall of the connecting frame, the top and the bottom of the membrane shell are fixedly communicated with a water inlet pipe and a water outlet pipe respectively, the high-pressure pipe is communicated with the water inlet pipe, the bottom of an inner cavity of the membrane shell is fixedly connected with a pure water pipe, the pure water pipe is communicated with the water outlet pipe, and a plurality of round holes are formed in the outer wall of the pure water pipe. According to the utility model, the reclaimed water can be preliminarily classified and filtered through the plurality of filter sheets, and is fully contacted with the reverse osmosis membrane, so that the phenomenon that impurities block the end part of the reverse osmosis membrane is avoided, and the reverse osmosis effect is improved.

The application discloses a pressure pipeline repairing device, relates to the technical field of pressure pipeline maintenance and repairing, and comprises a pipe body, a plugging assembly, a limiting assembly and a repairing assembly. The plugging assembly comprises a plugging side cover, a plugging top cover and a pressure relief pipe. The plugging side cover is attached to the upper end of the pipe body and located outside the damaged part of the pipe body. The plugging top cover is connected to the upper end of the plugging side cover through bolts. The pressure relief pipe is arranged at the center of the upper end of the plugging top cover and communicates with the plugging side cover. The limiting assembly comprises a limiting belt, a connecting seat and a connecting stud. The limiting belt is wrapped outside the lower end of the pipe body. The repairing assembly adopts an electromagnetic plate to generate an alternating magnetic field, performs non-contact electromagnetic heating on the plugging plate and a low-melting welding fusion plate, utilizes the melting characteristics of the welding fusion plate, and effectively bonds the plugging plate and the damaged part of the pipeline after cooling, so that the on-line welding repairing of the leakage point is realized from the outside of the pipeline. The operation process is safe, efficient and has high repairing strength.

A pipe wall cleaning and descaling device for a pressure pipe, comprising a circular column (1), a cylindrical circular groove (4) formed at one end of the circular column (1), and a connecting column (3) inserted into the cylindrical circular groove (4), wherein the circular column (1) is slidably connected to the connecting column (3). The device further comprises a descaling mechanism (2) arranged on the surface of the circular column (1). The descaling mechanism (2) comprises holding assemblies (21), a translation assembly (22), a cleaning assembly (23) and an adjusting assembly (24), wherein three holding assemblies (21) are arranged in an annular array on the surface of the circular column (1); the translation assembly (22) is arranged at one end of the circular column (1); the cleaning assembly (23) is arranged at the end of the circular column (1) away from the translation assembly (22); and the adjusting assembly (24) is arranged inside the circular column (1). By rotating a second threaded rod, the device can be adapted to pressure pipes of different diameters, while enabling adjustment of an acting force between the device and a pressure pipe, thereby extending the range of application of the device, and facilitating movement of the device in a pipe wall of the pressure pipe, achieving cleaning and descaling effects on the pipe wall of the pressure pipe.

The invention provides an air tank for relieving the positive pressure of a pipeline and an application method thereof, a first connecting pipe and a second connecting pipe are arranged between the bottom of the air tank for relieving the positive pressure of the pipeline and a pressure pipeline in a communicating mode, and a one-way damping device is installed in the first connecting pipe. The invention discloses an air tank for relieving pipeline positive pressure and an application method thereof, a double-connecting-pipe air tank with different bottom connection forms is designed, through combination with a one-way damping device, the impedance loss of the bottom of the air tank and the on-way loss of connecting pipes are changed, and the difficulty of water flowing into and out of the air tank is controlled; the water level of the air tank is adjusted, and the situation that the positive pressure in the pipeline exceeds the standard is effectively relieved. According to the method, under the condition that the size of the air tank is not changed, the phenomena that the pressure in the pipeline exceeds the standard and the water level of the air tank exceeds the range are avoided by adjusting the sizes of the connecting pipe and the valve, certain economic benefits are achieved, and support is provided for safe and stable operation and optimization of a pump station water conveying system.

The invention relates to a flameout control method, system and equipment for a gas heating water heater and a medium. The gas heating water heater comprises a sealed combustion system, a Venturi mixer and a pneumatic gas valve which are sequentially communicated, and a command valve of the pneumatic gas valve is connected to an air purification bin of the sealed combustion system through an air pressure pipe. The method comprises the following steps: in a whole machine debugging stage, setting the pressure of a zero-position adjusting spring of a command valve of the pneumatic gas valve to be a negative value; in the operation stage of the water heater, whether the combustion flame is out of flame or not is determined based on the ratio of the gas flow to the air flow; the pneumatic gas valve is closed by the controller in response to a combustion flame off-flame stall. When the smoke pipe is seriously blocked, the pneumatic gas valve can be closed, so that the whole machine is shut down, and the gas heating water heater is protected.

The invention discloses an automatic material taking device for project lamp processing, comprising: a sleeve shell, a limiting block is fixed on the outer side of the sleeve shell, a limiting shaft is slidably arranged in the limiting block, and a second sensor is arranged at the lower end of the limiting shaft; the gas exchange pipe and the sleeve shell are integrally formed; the negative pressure clamping part is arranged in the gas exchange tube and comprises a negative pressure tube, a miniature vacuum pump fixed on the negative pressure tube and a suction cup arranged at the lower end of the negative pressure tube, and a first sensor is arranged at the lower end of the suction cup; the first cover plate and the second cover plate are arranged at the upper end of the sleeve shell, an air pressure control part is arranged between the first cover plate and the second cover plate, the air pressure control part comprises a servo motor and a rotatable control frame plate, and a ventilation hole is formed in the control frame plate. The lens is adsorbed through the multiple independent negative pressure clamping parts, and the risk of microcrack generation is effectively eliminated; by adopting a micro vacuum pump and a sucker, the adsorption stability is ensured.

The utility model discloses a pressure resistance detection mechanism for a pressure pipeline of special equipment. The pressure resistance detection mechanism comprises a supporting assembly, an adjusting module and a clamping module, the clamping module comprises a lead screw groove, two sliding blocks are arranged in the lead screw groove, and the two ends of the inner side of the lead screw groove are movably connected with one ends of two-way lead screws respectively. The two sealing caps are moved to the height flush with the pressure pipeline through the adjusting module, the two sealing caps are close to each other through the clamping module, so that the pressure pipeline is clamped by the two sealing caps, the pressure pipeline and the two sealing caps form a relatively closed space, an external air pump is opened, and the pressure pipeline is sealed. Peripheral air enters the valve and the pressure pipeline through the air pump, the numerical value of the barometer is observed at the same time, when the barometer reaches a certain numerical value, the external air pump is closed, waiting is conducted for a period of time, the numerical value of the barometer is observed again, the numerical value at the moment is compared with the numerical value of the last time, and the anti-pressure capacity of the pressure pipeline is obtained.

A method for producing a lining hose (1) with an integral, preferably felt or fleece-laminated, circumferentially closed inner film hose (2) and a fiber tape layer (4) impregnated with a curable reaction resin arranged thereon for lining channels and pressure and / or drinking water pipes, is characterized by the following process steps: Inserting a mandrel (6) with a winding tongue (8) arranged thereon into a first leading end of the inner film tube (1), p Arranging the mandrel (6) with the inner film tube (2) surrounding it on the bearings (12), in particular sliding surfaces or rollers of a guide track (10) for the inner film tube (2), Moving the inner film tube (2) by means of a transport device (12) over the mandrel (6) and the winding tongue (8), Generating a magnetic force (F) between the mandrel (6) arranged inside the inner film tube (2) and a magnetic holding device (14) arranged outside the inner film tube (2), wherein the holding device (14) is designed to fix the mandrel (6) in an axial position and / or to urge the mandrel (6) against the bearings (12), in particular the sliding surfaces and / or rollers of the guide track (10), while the inner film tube (2) is moved over it, and Overlapping, helical wrapping of the inner film tube (2) continuously moved over the mandrel (6) and the winding tongue (8) with at least one resin-impregnated fiber band (4a). The invention further relates to a device for carrying out the method.

The utility model provides a pressure test connection tool, a plugging tool and a suite of a flange pressure tapping orifice plate flowmeter, and belongs to the technical field of flowmeter detection equipment. The pressure test connecting tool comprises an abutting rod, a base and a sealing head are arranged at the two ends of the abutting rod respectively, the base is used for supporting the abutting rod, the abutting rod is used for abutting the sealing head, a sealing ring is arranged on the end face of the end, away from the abutting rod, of the sealing head, a communicating hole is formed in the sealing head, and the communicating hole is communicated with the connecting pipe in a sealed mode. The plugging tool comprises a connecting component, a connecting piece, a plugging cover and a pressing component, the connecting piece is connected with the pressing component and the connecting component, the plugging cover is arranged on the pressing component, and the pressing component is used for pushing the plugging cover to be pressed on the part to be plugged. The pressure test connecting tool can achieve sealed connection of the connecting pipe and the pressure tapping hole, the plugging tool can achieve sealed plugging of the opening of the orifice plate flange pressure tapping pipe, the external member can achieve rapid pressure test of the flange pressure tapping orifice plate flowmeter, and the external member is simple in structure and convenient to use.

A ring circumscribing a moveable rod of a hydraulic damper. The movable rod defining an axis. The ring comprising a first wall, a second wall, an inner wall, an outer wall and a fluid passage. The fluid passage comprising a first channel extending radially along the second wall from the inner wall, with respect to the axis The fluid passage further comprising a second channel.

The invention relates to the technical field of bulk material discharging equipment, in particular to an AI automatic loading device. Comprising a stock bin, a connecting pipe and a liftable blanking pipe, a mounting ring is rotatably mounted in the connecting pipe, a foldable material distributing hopper is arranged on the mounting ring, a bendable connecting piece I is connected to the upper end of the material distributing hopper, the tail end of the connecting piece I is fixedly connected with the inner wall of the connecting pipe, and a supporting rod used for supporting the connecting piece I is mounted on the connecting pipe in a sliding manner in the radial direction; a negative pressure pipe coaxially arranged is suspended outside the connecting pipe, a plurality of air pipes are arranged on the inner wall of the negative pressure pipe, air ports in one-to-one correspondence with the air pipes are formed in the outer wall of the connecting pipe, and a sealing ring is rotationally installed on the outer wall of the connecting pipe. Aiming at particle materials, the material distributing hopper is opened to disperse the materials; and for powdery materials, the distributing hopper is folded and stored, so that the situation that dust raising is enhanced due to excessive dispersion of the powdery materials is avoided. When the material distributing hopper is folded, the negative pressure pipe is isolated from a connecting channel of the connecting pipe through the sealing ring, and flying dust is prevented from falling into a negative pressure adsorption system in the pipe.

The utility model provides a novel vacuum buffer tank for a reduced pressure distillation device, which relates to the field of distillation devices and comprises a tank body, a pressure pipe is mounted at the upper end of the tank body and is used for being connected with an external distillation device, a fixed disc A is fixedly connected in the tank body, two exhaust ports A are formed in the fixed disc A, and the exhaust ports A are communicated with the tank body. And a fixed disc B is slidably connected into the tank body. According to the novel vacuum buffer tank for the reduced pressure distillation device, through the arranged fixing disc B, when the air pressure in the tank body is increased, a spring A can play a buffering role to prevent the tank body from being damaged due to too large pressure, through the arranged two alarm mechanisms, when the air pressure reaches a preset value, one alarm mechanism can give an alarm, and when the air pressure is too large, the alarm mechanism can give an alarm. The two alarm mechanisms can give an alarm at the same time to remind workers, and the workers are prevented from continuously climbing to the top of the buffer tank to check the pressure gauge to prevent danger caused by excessive pressure.

The utility model belongs to the technical field of ball valves, and particularly relates to an adjustable bidirectional pressure-bearing eccentric semi-ball valve which comprises a valve body, two ends of the valve body are respectively connected with a liquid inlet pipe and a liquid outlet pipe, the upper end of an eccentric shaft penetrates out of the valve body to be connected with a turbine, and a driving main gear is arranged on the eccentric shaft. The liquid inlet pipe and the liquid outlet pipe are provided with pressure adjusting mechanisms connected with the driving main gear in a meshed mode, the liquid inlet pipe and the liquid outlet pipe are connected with a pressure pump through a pressure pipe, and the bottom of the liquid inlet pipe and the bottom of the liquid outlet pipe are connected with pressure release valves through pressure release pipes. The pressure pump and the pressure release valve are used for adjusting the internal pressure of the valve body to be the same as the internal pressure of the liquid inlet pipe and the liquid outlet pipe, the turbine transmission rod is rotated to drive the eccentric shaft to rotate, the ball body and the pressure adjusting valve are synchronously driven to rotate by driving the main gear and the driven gear to be meshed, and synchronous opening and closing of the valve body and the liquid inlet pipe and the liquid outlet pipe can be rapidly achieved. The ball body is prevented from deflecting; and when liquid enters the valve body, the eccentric shaft and the ball body rotate more stably and safely, and convenience is brought to rotating operation of maintenance personnel.

The invention relates to an outer cylinder prestress reinforced composite material pipe and a design method thereof, and belongs to the technical field of fluid conveying pressure pipelines. The pipeline comprises an outer cylinder, a middle steel cylinder and a concrete inner cylinder, the pipe diameter is 1600-5000 mm, the outer cylinder is composed of a composite material formed by mixing multiple layers of annularly-wound glass fibers and epoxy resin and is prestressed, the glass fibers account for 50%-70% of the volume of the outer cylinder, the equivalent elastic modulus, the Poisson's ratio and the tensile strength are calculated, mechanical analysis of the composite material is simplified, and the tensile strength of the composite material is improved. The middle steel cylinder is configured as a supporting layer, and the concrete inner cylinder is configured as a pressure-resistant and fluid channel. Based on the thick-wall cylinder theory, the prestress of the outer cylinder enables the concrete inner cylinder to be pressed in advance, the internal pressure tensile stress is counteracted, and the cracking risk is reduced. Under regulation and control of prestress, the outer cylinder bears main circumferential tension, tension of the middle steel cylinder is reduced, and cooperative bearing is achieved. The composite pipe has high strength, light weight and corrosion resistance, the problems that a traditional pipe is prone to cracking, high in steel consumption and short in service life are solved, and safety, durability and economical efficiency are remarkably improved.

The invention discloses a multi-angle cavitation water jet ice breaking experimental device and method in an immersion state, and relates to the technical field of ice breaking devices.The multi-angle cavitation water jet ice breaking experimental device comprises a water tank supporting frame, a transparent water tank and a jet control mechanism are arranged in the water tank supporting frame, and the jet control mechanism is installed at the bottom of the transparent water tank and comprises an adjusting assembly and a nozzle assembly; the test piece impact assembly is used for impacting the fixed test piece and comprises a supporting assembly and a clamping assembly; the pressure output assembly comprises a high-pressure pump set, a high-pressure electromagnetic valve, a constant-pressure tank and a high-pressure pipe for connecting all the parts; the device can complete a cavitation jet ice breaking test in an immersion state, the nozzle can realize vertical movement and multi-angle jet operation through the position adjusting assembly, and experiment requirements of different jet target distances and different jet inclination angles can be met at the same time; linkage operation of the high-pressure electromagnetic valve and the high-pressure pump set can be achieved through computer control, and the testing effect is guaranteed.