1248 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 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 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 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 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 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 relates to the technical field of high-pressure cleaning, in particular to an intelligent operation control system for a high-pressure cleaning pump, which comprises a working condition sensing module, a control module and a control module, the state recognition module is used for respectively determining a spray hole blockage area and a water mist interference coefficient according to the spray hole image and the real-time operation diagram; the blockage quantification module is used for selecting a corresponding quantification mode according to the water mist interference coefficient so as to determine a spray hole blockage index; the cavitation evaluation module is used for calculating a cavitation strength coefficient by combining the pipeline pressure, the working amplitude of the pump body and the blockage index of the spray hole; the regulation and control execution module is used for determining an adjustment mode of the water outlet pressure according to the cavitation intensity coefficient, the real-time operation diagram, the pipeline pressure and the pipeline flow; according to the high-pressure cleaning pump control system, the cleaning efficiency can be remarkably improved.

The utility model discloses a dedusting deslagging blowout prevention system buffer device which comprises a box body, a high negative pressure pipeline connector, a low negative pressure pipeline connector and a box body spraying device are arranged on the left side and the right side of the top of the box body respectively, the high negative pressure pipeline connector and the low negative pressure pipeline connector are connected to a high negative pressure pipe and a low negative pressure pipe respectively, and a deslagging drainage port is formed in the left side of the box body. A dust removal device negative pressure pumping opening, an orifice slag discharging and conveying opening and a sewage high-pressure water switching opening are sequentially formed in the right side of the anti-spraying hole dust remover from top to bottom and are respectively connected to a dust discharging pipe of the anti-spraying hole dust remover, a slag discharging pipe of the drilling machine and a high-pressure water pipe; the anti-spraying hole dust remover is connected to a dust collecting pipe connected with the drilling machine. Drilling cuttings generated in the drilling construction process, compressed air used for deslagging and gas enter the buffer box in a unified mode, centralized treatment is carried out, and the problems that in the drilling process, dust prevention and control are difficult, gas fluctuates, an extraction pipeline is blocked by accumulated slag and the like are solved.

The invention discloses a novel welding seam detection ruler for supervision and inspection of a pressure container and a pressure pipeline, and relates to the technical field of welding seam detection, the novel welding seam detection ruler comprises two bases, a first ring hoop and a second ring hoop, the two sides of the two bases are connected with hinge pieces, and one sides of the hinge pieces are connected with the first ring hoop and the second ring hoop respectively; and one end of the surrounding hoop I and one end of the surrounding hoop II are connected with a butt joint block and a connecting block respectively. A to-be-detected pipeline or pressure vessel is correspondingly inserted between the first hoop and the second hoop, then the first hoop and the second hoop are pulled to turn over around the hinge piece and are fastened through the fixing bolts, sleeving connection can be achieved, the pressure pipeline and the pressure vessel are supported and fastened through the multiple inner attaching rollers, and therefore the pressure vessel and the pressure vessel can be conveniently and rapidly detected. Traditional magnetic attraction or adhesive fixation is replaced, poor contact and influence on the fastening effect caused by change of the curved surface rate are prevented, the effect of stabilizing the detection reference is achieved, displacement or shaking in the detection process is avoided, and the welding seam detection accuracy is ensured.

The invention provides a hydropower station pressure pipeline rapid leaking stoppage and repair method which comprises the steps that a pipeline is detected through ultrasonic flaw detection equipment, a leakage area is preliminarily locked, and the specific position, size and shape of a leakage point are further analyzed through thermal imaging equipment; the automatic pipeline surface pretreatment device is started, a polishing head and a cleaning spray head are accurately controlled through a mechanical arm, oil stains, rust and an oxide layer on the pipeline surface are removed, and it is guaranteed that the pipeline surface is clean; according to the shape and the size of a leakage part, appropriate parts are selected from the modular leakage stopping clamp to be assembled, the clamp is tightly attached to the leakage part, and an effective sealed space is formed; and the high-pressure glue injection gun is used for accurately injecting the strong corrosion-resistant quick-curing sealant into the leakage part, the sealed space is filled, and repairing is completed. According to the method, the leakage part of the pressure pipeline can be quickly and effectively subjected to leakage stoppage and repair under the condition that the hydropower station is not stopped, the efficiency and quality of leakage stoppage and repair are improved, and the maintenance cost and the influence on normal operation of the hydropower station are reduced.

The invention discloses a two-stage slag separator tailing diluting and re-screening device, which relates to the technical field of tailing screening, and comprises a box body, a first screening cavity, a diluting cavity and a second screening cavity, a first screening assembly and a second screening assembly are arranged on the box body; the first screening assembly comprises a first connecting seat, a first screening seat, a first synchronous belt structure and a screening mesh belt; heavy impurities in tailings are screened through the arranged diluting assembly and the arranged first screening assembly, light impurities in the tailings are screened through cooperation of a first screening base, a first synchronous belt structure, a screening net belt and a liquid guide pipe, and the impurities are collected through cooperation of a negative pressure suction nozzle, a negative pressure pipe, negative pressure equipment and a collecting tank; according to the screening device, the supporting plate, the filtering base, the filtering piece, the filtering plate, the first air guiding piece, the second air guiding piece and the driving motor are arranged, collected impurities are cleaned, the first screening assembly does not need to be stopped, the screening effect of the first screening assembly is improved, and the using effect of the screening device is improved.

The invention relates to the technical field of gas cylinder valves, and discloses a pulse type oxygen valve regulation and control device which comprises a shell, the shell is provided with at least one sunken gas inlet bin which is annularly distributed at equal angles, a rotating bin is arranged in the center of the shell, a sliding sleeve is arranged on the side face of the gas inlet bin, and the rotating bin is provided with a rotating shaft. The center of the rotating bin is rotationally connected with a rotating discharging pipe, the side wall of the rotating discharging pipe communicates with a side inlet pressure pipe, the side inlet pressure pipe is slidably connected to the interior of the sliding sleeve, and an air inlet groove is formed in the inner side wall of the sliding sleeve; the elastic coefficient of the torsion spring of the discharge pipe can be increased, under the effect of the lever principle, the acting force of gas driving the rotary discharge pipe to rotate is reduced, when the rotary discharge pipe has elastic fatigue, only the torsion spring needs to be slightly twisted, and the problem of partial elasticity loss caused by the elastic fatigue can be counteracted; the problem that the stable pressure stability is reduced due to elastic fatigue caused by long-term spring application is solved.

The utility model relates to the technical field of pressure pipeline maintenance, in particular to a pressure pipeline deformation detection device which comprises a moving vehicle body, a first detection assembly and a second detection assembly, and the first detection assembly and the second detection assembly are arranged at the two ends of the moving vehicle body respectively in the moving direction of the moving vehicle body in a pressure pipeline; the first detection assembly comprises a supporting component, a displacement sensor, a detection component and a spring, the supporting component is arranged on the mobile vehicle body, the displacement sensor is arranged on the supporting component, and the detection component is slidably connected with the detection end of the displacement sensor; the spring is arranged between the detection component and the detection end of the displacement sensor along the moving direction of the detection component; the second detection assembly comprises a pull rope encoder and a limiting component, the pull rope encoder is arranged on the movable vehicle body, and one end of the pull rope encoder is connected with the limiting component. The pressure pipeline deformation detection device provided by the utility model can detect the deformation quantity of the inner wall of the pressure pipeline, is simple and convenient to operate, and saves time and labor.

The invention discloses a high-pressure cleaning machine with a novel spray gun structure. The high-pressure cleaning machine is composed of a cart, a booster pump and a spray gun body. The spray gun body comprises a spray gun shell, a trigger and a gun valve body, and the trigger is rotationally installed on the gun valve body and can control opening and closing of the gun valve body. The spray gun body is further provided with a nozzle, a negative pressure pipe and other components. The negative pressure pipe is communicated with the gun valve body and the nozzle, a negative pressure area is formed in the pipe, and an air valve and a liquid extractor are installed on an upper installation opening and a lower installation opening respectively. The liquid extractor is composed of a fixing pipe and a liquid extracting hose, a one-way valve is arranged in the fixing pipe, and the kettle body and the liquid extracting hose are detachably connected to the bottom end of the fixing pipe. The one-way valve is composed of a second spring, a semi-spherical valve element and the like, and an inserting rod can be inserted into a first annular groove of a valve element movable rod. When the inserting rod is inserted into the first ring groove, the one-way valve is closed, and water flow is directly sprayed out in a clear water form; the driving rod is operated to move the inserting rod out of the first annular groove, the negative pressure area drives the valve element to move through negative pressure, the one-way valve is opened, cleaning liquid in the kettle is extracted to be mixed with water to be sprayed out, and convenient switching of cleaning liquid spraying and clean water spraying is achieved.

The utility model relates to the technical field of casting, in particular to a vacuum negative pressure device for lost foam casting. According to the technical scheme, the device comprises a mounting bottom plate, a vacuum pump is arranged above the mounting bottom plate, a pressure stabilizing assembly is arranged at the position, located on the mounting bottom plate, of the air inlet end of the vacuum pump, a filtering assembly is arranged on one side of the pressure stabilizing assembly, a negative pressure pipe is arranged on a connecting pipe, and a vacuum distribution mechanism is arranged at the end, away from the connecting pipe, of the negative pressure pipe. The filtering assembly adopts a multi-layer composite filtering structure, so that impurities in gas can be efficiently removed, meanwhile, the system pressure can be monitored and adjusted in real time through an intelligent central controller in the pressure stabilizing assembly, pressure fluctuation is effectively buffered, a stable negative pressure environment is provided for lost foam casting, and the production efficiency is improved. And meanwhile, the vacuum distribution mechanism is designed in a modularized mode, negative pressure distribution can be accurately controlled according to different production requirements, the air exhaust efficiency is improved, and the production efficiency of lost foam casting and the precision of castings can be improved.

The utility model discloses a horizontal roadway filling roof contact device, belongs to the technical field of mine filling, and solves the problems that the existing device is poor in filling effect, and filling slurry cannot be in 100% roof contact with a roadway roof. The device comprises a non-elastic air bag and a pressure pipeline, the non-elastic air bag is installed in a horizontal roadway, one end of the non-elastic air bag is connected with a first connecting pipe and a second connecting pipe, the second connecting pipe is connected with a discharging branch pipe through a filling discharging pipe, the discharging branch pipe is provided with a discharging valve, and the pressure pipeline is connected with the first connecting pipe. And an air inlet valve and an exhaust valve are arranged on the pressure pipeline. The utility model has the advantages of simple structure, convenient construction process and obvious filling effect, realizes 100% roof contact between the filling slurry and the roadway roof, and has strong practicability and wide application prospect.

The utility model relates to the technical field of negative pressure devices, in particular to a water circulation negative pressure device which comprises a negative pressure tank connected with a negative pressure pipe. The inlet end of the water circulation vacuumizing assembly is communicated with the negative pressure tank through an air inlet pipe, the outlet end of the water circulation vacuumizing assembly is connected with a circulating water assembly through an exhaust pipe, and the circulating water assembly is provided with an exhaust port; and one end of the drainage pipe is connected with the lower end of the circulating water assembly, the other end of the drainage pipe is connected with the inlet end of the water circulation vacuumizing assembly, a first valve control assembly is installed on the drainage pipe, and the first valve control assembly is electrically connected with the control assembly. Noise and energy consumption are reduced, and the device is not sensitive to impurities in gas.

The invention belongs to the technical field of pipeline detection, and particularly relates to an online nondestructive flaw detector for pressure pipeline detection. Comprising a detection mechanism and a pair of clamping driving mechanisms, and the detection mechanism is arranged between the two clamping driving mechanisms; the detection mechanism comprises a fixing frame, a flaw detection assembly is connected below the fixing frame, the flaw detection assembly comprises a pair of arc-shaped rails, arc-shaped gear rings are slidably connected to the rails, and a plurality of flaw detection heads are mounted on the arc-shaped gear rings; a driving assembly is installed below the fixing frame and used for driving the arc-shaped gear ring to rotate, the driving assembly comprises a connecting base, a driving gear is rotationally connected to the connecting base, and the driving gear is meshed with the arc-shaped gear ring; a cleaning assembly is fixedly mounted on the arc-shaped gear ring; the cleaning assembly rotates along with the arc-shaped gear ring, the cleaning rolling brush cleans the surface of the pipeline, and it is avoided that dirt and impurities affect the detection result of the pipeline.

The invention relates to the technical field of water conservancy sand content detection, in particular to a water conservancy and hydrology sand content sampling detection device with a water flow disturbance function and a detection method. Comprising a lifting hanging plate and a sampling barrel, the sampling barrel is composed of a barrel top, a barrel body and a barrel bottom which are detachably connected, a water inlet is formed in the upper portion of the barrel body, an opening and closing structure is arranged on the barrel top, a negative pressure pipe is arranged in the sampling barrel, and a water filtering structure is arranged in the barrel bottom. The suspension assembly is provided with a first jet nozzle arranged along the vertical direction of the outer wall of the cylinder bottom, and the vortex assembly is provided with a second jet nozzle arranged along the tangential direction of the outer wall of the cylinder body. Through the synergistic effect of the multiple sets of jet flow nozzles which are arranged obliquely upwards and tangentially, in combination with rotation of the barrel, three-dimensional spiral turbulent flow is formed, uniform mixing of water samples is achieved, linkage of the floating plate and the liquid level sensor is matched for precise quantity control, the consistency of sampling volumes is ensured, and automation, accuracy and reliability of sand content detection are improved.

The utility model relates to the field of detection devices, in particular to a liquid immersion type pressure pipeline air tightness detection device, which comprises a liquid immersion box, a corrugated main pipe, a lifting frame and an air tightness immersion mounting pipe, through a separation area formed by the wave impingement plate and the blocking lines, in combination with a built-in infrared sensor, bubble dynamic states are monitored in real time, subjective errors of naked eye observation are eliminated, tiny leakage is effectively recognized, the lifting frame is driven by the air cylinder to ascend and descend, the water pressure in the liquid immersion box can be accurately adjusted, and pressure impacts of different working conditions on a pipeline can be simulated. Meanwhile, the wave impingement plate and the stabilizing plate cooperate to reduce water flow fluctuation interference, the airtight soaking mounting pipe is subjected to steering adjustment and air bag floating ball self-adaptive positioning, rapid adaptation of different pipe diameters and mounting angles is supported, the operation complexity is reduced, an airtight sleeve and a branch sleeve form a multi-layer sealing structure, and the service life is prolonged. The pressurizing box is combined to control the air pump to dynamically compensate air pressure, misjudgment or equipment damage caused by sudden pressure change in the detection process is prevented, and the overall detection effect is improved.

The invention particularly relates to a flexible telescopic vacuum pipeline based on pneumatic driving, and solves the problems of high working complexity, low efficiency, inaccuracy and uncontrollability in the mounting and dismounting process of the existing vacuum pipeline. The vacuum pipeline comprises a fixed flange, an inner corrugated pipe, an outer corrugated pipe, a lap joint flange, an air hole and an air pipe, one end of the inner corrugated pipe and one end of the outer corrugated pipe are respectively and fixedly connected with the inner end of the fixed flange, the other end of the inner corrugated pipe and the other end of the outer corrugated pipe are respectively and fixedly connected with the inner end of the loose flange, and an annular sealing cavity is formed among the inner corrugated pipe, the outer corrugated pipe, the fixed flange and the loose flange; the inner corrugated pipe and inner cavities of the fixed flange, the lap joint flange, the external high-pressure pipe and the external low-pressure pipe form a vacuum cavity; an air hole is formed in the inner end of the fixing flange, one end of the air pipe is connected with the air hole, the other end of the air pipe is connected with external air source equipment, and the air pipe is used for inflating the annular sealing cavity to extend the vacuum pipeline or exhausting air to shorten the vacuum pipeline.

The purpose of the present invention is to suppress the solidification of a pressure medium and to perform a pressurization process at a required pressure. The isostatic pressing device (10) uses a pressure medium having the property that the higher the pressure is, the higher the viscosity is. An isostatic pressing device (10) is provided with: a pressure vessel (12) in which a processing space (12a) capable of accommodating a pressure medium is formed; a supercharger (14) that pressurizes the pressure medium in the processing space (12a) to obtain a set pressure; a first heater (37), which is provided in a high-pressure pipe (32) connecting the supercharger (14) and the pressure vessel (12), and which heats the pressure medium to a target temperature before the pressure medium is introduced into the processing space (12a); and a second heater (39) that is provided upstream of the first heater (37) in the high-pressure pipe (32) and heats the pressure medium before reaching the first heater (37).

The invention discloses polyurethane foam processing and forming equipment, and relates to the technical field of foam cutting machines. A moving mechanism is arranged below the working table, a cutting wire and a voltage controller are arranged above the working table, two limiting slideways which are symmetrically arranged left and right are formed in the working table, two ends of the cutting wire are connected with a secondary tap of the voltage controller, and a primary tap of the voltage controller is connected with an external power supply through a switch. The cleaning brush is used for scraping coking matter residues attached to the surface of the electric heating wire in real time, so that the electric heating wire for cutting the polyurethane foam is cleaned, meanwhile, the negative pressure pump forms negative pressure in the cleaning box through the spiral negative pressure pipe, the scraped residues are sucked into the cleaning and collecting cavity in time, the residues are prevented from falling off, a workbench and the to-be-cut polyurethane foam are prevented from being polluted, and the service life of the workbench is prolonged. The problem of secondary pollution caused by traditional manual cleaning is solved, the lifting height and the horizontal cutting path of the cutting wire can be accurately controlled through the lifting mechanism and the moving mechanism, the size precision of foam cutting is improved, and the cutting requirement is met.

The utility model discloses an electric power pipeline sealing waterproof plug device, and particularly relates to the technical field of electric power pipelines, the electric power pipeline sealing waterproof plug device comprises a plug pipe, one end of the plug pipe is closed, the other end of the plug pipe is provided with an opening, the plug pipe opening is sleeved outside the end portion of the electric power pipeline, and a sealing block moving back and forth is arranged inside the plug pipe. A rotating shaft mechanism for pushing the sealing block to move is installed at the end, away from the opening, of the sealing block, the rotating shaft mechanism penetrates through the plug pipe and extends out of the plug pipe, a plurality of sealing grooves are formed in the outer wall, attached to the plug pipe, of the sealing block, and hollow rubber hoses are embedded in the sealing grooves; and an air pipe communicated with the interior of the rubber hose is inserted into the sealing block. The rotating shaft mechanism is arranged to drive the sealing block to achieve preliminary mechanical sealing, the pressure pipe fitting enhances dynamic sealing through air pressure adjustment, the limiting mechanism guarantees operation safety, and the waterproof sealing problem of the power pipeline is efficiently solved through the dual effects of machinery and air pressure.