2204 results about "Pressure pipe" patented technology

The invention belongs to the technical field of anti-explosion electric cabinets, and particularly discloses an anti-explosion electric cabinet for new energy supply, which comprises an anti-explosion electric cabinet and an active cooling and fire extinguishing system, and is characterized in that the active cooling and fire extinguishing system comprises a centralized cooling and fire extinguishing unit, a confluence controller, a control module, a plurality of pressure pipelines and a plurality of temperature feedback devices; a plurality of working parts in the explosion-proof electric cabinet are respectively provided with a monitoring unit; the explosion-proof electric cabinet has the advantages that the monitoring unit is arranged in the explosion-proof electric cabinet, real-time monitoring of the environment of the electric cabinet is achieved, and especially under the abnormal conditions of high temperature and the like, the active cooling and fire extinguishing system can rapidly respond, automatically increase the spraying amount of the fire extinguishing material and improve the fire extinguishing effect. The system integrates a passive pressure relief structure, an active explosion venting system, an inerting explosion suppression system and automatic water mist spraying, multi-level safety protection is provided, and safety and stability of electric power distribution facilities, especially an electric cabinet and a distribution box in a new energy grid-connected system in a complex environment are ensured.

The utility model provides a pressure pipeline self-propelled detection device, which relates to the technical field of pressure pipeline detection, and comprises a fixed plate, a cleaning and detection mechanism is arranged below the fixed plate, and the cleaning and detection mechanism comprises a semicircular frame, a first servo motor, two rotating plates and two cleaning brushes. Pushing rods are fixedly connected to the side faces, away from the semicircular frame, of the two rotating plates, sliding frames are fixedly connected to the side faces, close to the semicircular frame, of the two cleaning brushes, and the two pushing rods are slidably connected to the inner walls of the two sliding frames correspondingly. And the outer surface of the semicircular frame is fixedly connected with a dust collector. According to the self-propelled detection device for the pressure pipeline, through the arrangement of the fixing plate and the cleaning and detection mechanism, sundries attached to the surface of the pressure pipeline can be swept and collected, infrared rays emitted by the infrared detection probe are prevented from being influenced by the sundries on the surface of the pressure pipeline, the pipeline detection accuracy of the infrared detection probe is guaranteed, and therefore the detection effect is improved.

The invention relates to the technical field of part detection, in particular to a pressure gauge sealing performance detection device. The technical problems are as follows: leakage possibly exists at the joint of the pressure gauge and the air pressure pipe, the sealing detection of the pressure gauge body is influenced, the detection is not accurate enough, the existing sealing detection device is inconvenient to simulate the actual situation, the detection is not sufficient enough, the detection result of the pressure gauge is difficult to have effectiveness, and the detection efficiency is poor. Therefore, the detection effect is not good. A pressure gauge sealing performance detection device comprises a base, the bottom of the periphery of which is fixedly connected with support legs; the water tank is mounted on the base, and glass plates are mounted on two sides of the water tank. A worker can observe the interior of the water tank through the glass plate to know specific leakage points of the pressure gauge, so that the sealing performance of the pressure gauge is accurately detected, the performance of the sealing performance of the pressure gauge under uncertain air pressure is simulated, the sealing performance of the pressure gauge can be fully detected, and the detection effect is remarkably enhanced.

The invention discloses hydraulic power plant civil engineering pressure pipeline monitoring equipment, and relates to the technical field of pressure pipeline monitoring. The problem that monitoring is not comprehensive enough due to the fact that monitoring points are relatively fixed is solved. The device specifically comprises a top plate, fixing rings are fixedly connected to the two ends of the top plate, clamping mechanisms are arranged on the inner sides of the fixing rings, supporting plates are fixedly connected to the outer walls of the four corners of the bottom of the top plate, the bottoms of every two supporting plates are fixedly connected with the same base, and a rotating mechanism is arranged on one side of the middle of the top plate; a reciprocating moving mechanism is arranged on one side of the rotating mechanism, the rotating mechanism comprises a second motor, driving teeth, a first guide ring, a second guide ring, a large gear ring and a monitoring head, one side of the bottom of the second motor is slidably connected to the inner side of the base, and the driving teeth are connected to the output end of the second motor through threads. According to the pressure pipeline monitoring device, the defects of traditional fixed monitoring are overcome, multi-point monitoring on the surface of the pressure pipeline is promoted, the monitoring efficiency of the pressure pipeline is improved, and the monitoring quality is guaranteed.

A suspension system including hydraulic circuits that extend between dampers located at opposite corners of the vehicle and at least one load distribution unit that is connected in fluid communication with at least two hydraulic circuits. The load distribution unit includes a manifold block with a cylinder bore, a pair of pressure tubes, a piston rod assembly, and a pair of reserve tubes. The pressure tubes are partially received in the cylinder bore to define a pair of opposed cylinders. The piston rod assembly includes a piston rod and a pair of opposed pistons that are slidingly received within the opposed cylinders. The reserve tubes are at least partially received in the cylinder bore and are arranged annularly about the pressure tubes to define a first pair of reservoir chambers between the pressure tubes and the reserve tubes.

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 utility model provides a high-pressure water jet concrete scabbling device. The high-pressure water jet concrete scabbling device comprises a mounting frame; the high-pressure water conveying unit comprises a high-pressure pump arranged on the mounting frame, a water storage tank and a waterway plate located at the bottom of the mounting frame, the waterway plate is provided with a water inlet and a plurality of nozzles communicated with the water inlet, the water storage tank is connected with the high-pressure pump through a high-pressure pipe, and the high-pressure pump is connected with the water inlet of the waterway plate through another high-pressure pipe; the installation frame is provided with a supporting frame, the telescopic rod is arranged on the supporting frame in a sliding mode, the waterway plate is rotationally arranged at the end of the telescopic rod, and an adjusting piece connected with the waterway plate is arranged at the end of the telescopic rod. According to the scheme, manual holding for chiseling is not needed, impact generated by chiseling is prevented from hurting a human body, a large amount of dust can be prevented from being generated during chiseling, the nozzles can be used for chiseling roadsides, pier columns, the bottoms, the side faces and the inclined faces of grooves, the use range of the scheme is widened, the applicability is improved, and the production efficiency is improved. And the device can be used in each construction site.

The invention relates to the technical field of pressure pipeline production, and discloses a pressure pipeline with internal lines and extrusion molding equipment, the extrusion molding equipment comprises an extruder and a shaping box, and is used for transporting the pressure pipeline extruded by the extruder and shaping the pressure pipeline in the transportation process; the cutting unit is used for cutting a new material extruded from the extruder; the butt joint unit is used for carrying the cut new material and sleeving the annular new material on the traction pipe; the first fixing plate is connected with the extruder; the adjusting assembly is used for changing the position of the new material; the second fixing plate is used for connecting the adjusting assembly; the extrusion assembly is connected with the second fixing plate, extrudes the new material located on the traction pipe and enables the new material to be separated from the traction pipe after heating work of the traction pipe is completed; the annular new materials are adsorbed and carried, the annular new materials are located on the traction pipe, the new materials are extruded, the new materials abut against the outer wall of the traction pipe, and heating of the traction pipe is completed.

A pressure pipeline detection device disclosed by the present invention comprises a machine body, the interior of the machine body is detachably connected with a water tank, the bottom of the machine body is provided with a water pump, and the middle part of the top end of the machine body is fixedly connected with an L-shaped plate. Through cooperative use of the clamping adjusting mechanism, the pipe pulling mechanism, the sealing mechanism and the air blowing detection mechanism, the pressure pipeline body is divided into an upper half part and a lower half part for detection, and in the detection process, openings in the two ends of the upper half part and the lower half part are blocked by sealing rings and sealing gaskets, so that air cannot escape from the upper and lower openings, and the detection accuracy is improved. According to the invention, the pressure pipeline body longer than the water tank can be well detected, the water tank does not need to be replaced, convenience and rapidness are realized, automatic operation is realized in the whole process, substantive improvement is realized, and popularization and application are facilitated.

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.

The utility model discloses an oil mist recovery device which comprises an oil mist recovery shell provided with a front shell plate and a rear shell plate, a rectangular oil mist inlet hole is formed in the front shell plate, an upper guide groove formed in the oil mist recovery shell is formed above the oil mist inlet hole, and a lower guide groove formed in the oil mist recovery shell is formed below the oil mist inlet hole. A foam metal plate for shielding the oil mist inlet hole is arranged in the oil mist recovery shell, the upper end of the foam metal plate is connected into the upper guide groove in a sliding mode, the lower end of the foam metal plate is connected into the lower guide groove in a sliding mode, an oil collecting groove communicated with the lower guide groove is formed below the lower guide groove, and a supporting net plate is arranged between the oil collecting groove and the lower guide groove. The lower end of the foam metal plate is pressed on the supporting net plate, and the oil mist recycling shell is connected with a negative pressure pipe and an exhaust fan providing negative pressure for the interior of the negative pressure pipe. The oil mist recovery device has the advantages of being high in filtering capacity, safe, environmentally friendly, complete in overall function and high in practicability.

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 utility model relates to the technical field of cutting fluid recovery, and discloses a cutting fluid recovery device for metal cutting processing, which comprises a base, universal wheels are fixedly mounted at four corners of the bottom of the base, a collecting box is fixedly mounted at the top of the base, a sealing cover is inserted into the top of the collecting box, and a negative pressure pump is fixedly mounted at the top of the sealing cover. By arranging the universal wheels installed at the bottom of the base, the collecting box can be moved to a designated place, the negative pressure pump at the top of the driving sealing cover conveys negative pressure to the negative pressure pipe, the negative pressure pipe is aligned to the interior of a machine tool, and cutting fluid and waste chips in the machine tool are synchronously absorbed into the collecting box; and a gear in the cutting fluid screening mechanism is driven to rotate, a gear ring meshed with the gear can drive a filter drum to rotate, the filter drum drives the cutting fluid in the filter drum to do centrifugal motion with sweeps, the cutting fluid attached to the outer walls of the sweeps can be completely separated, a large amount of cutting fluid is discharged from a discharging port, and cutting fluid recycling is completed.

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 invention provides a hydraulic driving system capable of adaptively controlling the rotating speed of a cooling fan of a rail engineering vehicle, which is characterized in that an oil outlet of a hydraulic plunger variable pump is connected with one end of a pressure pipe connected with a hydraulic motor, and the other end of the pressure pipe is communicated with an oil inlet of a temperature control proportional valve group; one oil outlet of each temperature control proportional valve group is communicated with an oil return pipe through a hydraulic oil radiator, the oil return pipe is communicated with a hydraulic oil tank, and two branches of the oil return pipe are respectively communicated with the other oil outlets of the two temperature control proportional valve groups; a safety protection structure connected with the hydraulic motor in parallel is arranged on the pressure pipe, and the hydraulic plunger variable pump is connected with the flow adjusting structure. The system overcomes the defects that when a traditional switching value valve set controls on-off of the cooling fan, system pressure impact is large, and huge noise is generated, system power is dynamically matched in real time according to the heat dissipation requirement, safe operation of a vehicle is ensured, impact force of instant starting and stopping of the cooling fan is reduced, the noise generated by the cooling fan is weakened, and the service life of the vehicle is prolonged. And the traction available power of a vehicle power system is improved.

The invention discloses a novel mining high-power fracturing pump station system which comprises a clear water tank, a booster pump set, a fracturing pump device, a lubrication unloading device, a stop valve and a flow sensor, the clear water tank is connected with the booster pump set through a pipeline, and the fracturing pump device comprises a plunger pump and a first gear pump; the lubrication unloading device comprises an unloading valve, a lubrication valve block, a plate cooler and a second gear pump; a liquid inlet of the plunger pump is connected with the liquid suction pipe, a liquid inlet pipe is connected with the booster pump set, a liquid outlet of the plunger pump is connected with a first high-pressure pipe, the first high-pressure pipe is communicated to the unloading valve, a liquid outlet end of the unloading valve is connected with a second high-pressure pipe, the second high-pressure pipe is provided with a stop valve, and the flow sensor is arranged on the second high-pressure pipe. The unloading valve is arranged, the unloading valve can be remotely controlled through a program to rapidly release loads, and the safety performance of the system is greatly improved; safety pressure relief of the fracturing pipeline can be controlled by controlling the slow stop valve.

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.

The invention relates to a device for evaluating the strength of a temporary plugging agent. The device comprises a piston container, a high-pressure pipe, a parallel-bar pump, a rock core holder, a steel crack rock core model, a steel rock core and a waste liquid recovery storage tank, a plug of the piston container is connected with the parallel-bar pump, a lower port of the piston container is connected with the valve mechanism, and the tail end of the valve mechanism is connected with a high-pressure pipe inlet. A pressure sensor is arranged at the inlet end of the high-pressure pipe, and the tail end of the high-pressure pipe is connected with the core holder; a steel fractured rock core model and a steel rock core are arranged in the rock core holder, the outlet end of the steel fractured rock core model is connected with the steel rock core, and the tail end of the steel rock core is connected with the waste liquid recovery storage tank; a displacement experiment is carried out through the temporary plugging agent strength evaluation device, the plugging condition of the temporary plugging agent in a crack is simulated, the pressure change condition after the temporary plugging agent enters the crack is monitored, and the temporary plugging performance of the temporary plugging agent is accurately simulated and evaluated. The temporary plugging agent with poor effect can be prevented from being used, and the cost and time of oilfield development are reduced.