1133 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 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 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 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.

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 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 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 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 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 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.

The utility model relates to a pressure-bearing detection device for special equipment production, which comprises a pressure-bearing detection device body and a pressure detection mechanism arranged in the pressure-bearing detection device body, and two clamping plates positioned below the pressure detection mechanism are arranged in the pressure-bearing detection device body. The two clamping plates are located on the left side and the right side of the pressure detection mechanism correspondingly, fixing grooves are formed in the inner side walls of the clamping plates, movable rods are arranged at the tops of the clamping plates, one ends of the movable rods vertically penetrate into the fixing grooves, and positioning wheels rotationally connected with the ends of the movable rods are arranged in the fixing grooves. The length direction of the positioning wheel is consistent with the left-right direction of the pressure detection mechanism, the outer side wall of the movable rod is sleeved with a spring fixedly connected with the clamping plates, and the pressure-bearing detection device body is provided with a driving mechanism enabling the two clamping plates to move oppositely. The pressure pipeline fixing device has the advantage that a pressure pipeline can conveniently enter the fixing grooves of the clamping plates to be fixed.

Shock absorbers (20, 26) comprising: a pressure tube (30) that defines a fluid chamber; a piston arrangement (32) arranged within the pressure tube (30), wherein the piston arrangement (32) divides the fluid chamber into an upper working chamber (44) and a lower working chamber (46); a first valve arrangement which engages with the piston arrangement (32), wherein the first valve arrangement comprises a first circular valve body (60) and a first valve disk (80) which engages with the first circular valve body (60); wherein the first circular valve body (60) defines a first circular outer valve web (110) and a first non-circular inner valve web (112), wherein the first valve disk (80) engages with an entire upper surface of the first non-circular inner and first circular outer valve webs (112, 110), and wherein a center of the first circular outer valve web (110) is positioned in a center of the first circular valve body (60), characterized in that the first non-circular inner valve web (112) is a non-circular web with a circular section (AB) having its center in the center of the first circular valve body (60), a circular section (CD) having its center at a point spaced apart from the center of the first circular valve body (60), and with transition sections (BC; DA) between the circular sections (AB; CD); wherein the first circular valve body (60) defines a plurality of compression passages (70) and a plurality of expansion passages (72); and wherein the plurality of compression passages (70) is arranged only in a section of the area between the first circular outer valve web (110) and the first non-circular inner valve web (112), which corresponds to a position in the circumferential direction where the width between the first circular outer valve web (110) and the first non-circular inner valve web (112) is greater than the minimum width between the first circular outer valve web (110) and the first non-circular inner valve web (112).

The application discloses a multi-channel shaft kiln for calcining magnesite, wherein a distributing vehicle and a discharging device are located at the top and bottom of a kiln body. The kiln body is provided with a preheating section, a calcining section and a roasting section from top to bottom, and square strip-shaped channels are arranged in the kiln. A combustion chamber is arranged in the furnace wall on both sides of the calcining section with a width of 40-80 cm, the combustion chamber is built by hollow integral combustion bricks, the combustion chamber is communicated with the calcining section by cross-distributed through holes, the through hole outlet is downwardly inclined, and an inclined convex block is arranged at the top. The lower part of the roasting section is provided with an upper collecting opening and a lower expanding opening structure, an air pressure pipe is arranged in the inclined brick of the upper collecting opening, the opening of the air pressure pipe is downwardly inclined and communicated with the roasting section, and the lower expanding opening is matched with the upper semicircular surface of the discharging device. The middle part of the upwardly inclined distributing main pipe of the distributing vehicle is communicated with the branch pipe which is inclined and changed in direction, and a change valve is arranged in the main branch pipe. The application provides a comprehensive solution of the shaft kiln with high calcining quality, energy saving, low investment and long service life for calcining magnesite, and can also be used for high-quality calcining of small-particle materials.

The utility model relates to the technical field of mechanical engineering, and discloses a ground intelligent pressurization driving device which comprises a shell, a PLC is fixedly connected to the left side of the shell, a data transmission line is fixedly connected to the driving end of the PLC, a motor is fixedly connected to the rear side of the data transmission line, and the motor is fixedly connected to the left side of the shell. The driving end of the right side of the motor is fixedly connected with a coupler, the right side of the coupler is fixedly connected with a three-way connector, the rear side of the three-way connector is fixedly connected with a water tank, the right side of the three-way connector is fixedly connected with a multi-stage centrifugal booster pump, and the multi-stage centrifugal booster pump is fixedly connected with a pressure pipeline. According to the utility model, the motor enables water in the water tank to enter the multistage centrifugal booster pump under the action of the three-way connector, the water enters the pressure pipeline after pressure is applied to the water, the pressure transmitter controls the flow rate, the two electromagnetic valves control the water flow entering the channel, and the PLC can perform timing, quantitative and circulating pressurization on any channel.

The utility model discloses a pressure pipe roundness detection device for hydraulic engineering, which is used for solving the problem of detecting the inner diameter roundness of an engineering pipeline. The detection device comprises a walking frame assembly and a detection assembly, discs are installed at the front end and the rear end of an installation cylinder respectively, at least three supporting legs are movably connected to the discs at equal intervals in the circumferential direction, wheels are arranged at the outer ends of the supporting legs, steel pins are arranged at the inner ends of the supporting legs, and the steel pins are movably connected with sliding grooves of adjusting discs. The adjusting disc is arranged on the mounting cylinder in a sleeving manner and is in fit fit with the disc, and a locking bolt penetrates through a long-strip hole in the disc and a bolt hole in the adjusting disc to lock the disc and the adjusting disc; the detection assembly is installed on one side of the installation cylinder, and a traction rope is arranged on the other side of the installation cylinder. The device can be pulled to advance in the pipeline through the pulling rope, and a reference is set, so that rapid measurement on a construction site with a relatively large engineering quantity is realized.

The invention belongs to the technical field of insulator processing equipment, particularly relates to high-temperature vacuum sintering processing equipment and method suitable for tantalum insulator preparation, and aims to solve the problems of nonuniform cooling and low efficiency caused by door collision due to mutual correlation errors in multi-source driving of the equipment and difficulty in breaking a heat boundary layer by fixed blowing. The furnace mainly comprises a furnace body, and a furnace pipe is arranged in the furnace body and fixed through a supporting rod. The pushing structure comprises a pushing plate, a driving rod and a transmission shaft, the driving rod is meshed with a worm gear I and a worm gear II, the worm gear I is connected with a rotating shaft to control opening and closing of the furnace cover, and the worm gear II drives a rotating plate and a pin rod through the transmission shaft to enable the pushing plate to move, so that automatic pushing after sintering is achieved, and high-temperature gas damage is avoided; the atmosphere control structure comprises a vacuum pump and a negative pressure pipe for vacuumizing, and a pipe body and a U-shaped gas pipe for injecting argon to form a low-vacuum inert atmosphere; the cooling structure is composed of a U-shaped pipe, a fixing cylinder and a purging assembly. According to the equipment, the operation safety and the sintering efficiency are improved.

The invention relates to the technical field of material detection equipment, in particular to a gas hole sealing material comparison detection device and method.The gas hole sealing material comparison detection device comprises a base, a center shaft, a sleeve, a placement frame, a test tube and the like, the center shaft is vertically and fixedly connected to the center of the base, the sleeve is slidably connected to the center shaft through a spline, and the sleeve is radially connected with the placement frame; the test tube can be fixed in the placing rack in a clamping manner, the test device further comprises a main bearing sliding block, temperature sensing probes, pressure tubes and a digital display meter, a vertical convex key is arranged on the sleeve, the main bearing sliding block is connected to the sleeve in a sliding manner through the convex key, the temperature sensing probes and the pressure tubes are arranged on the side surface of the main bearing sliding block at intervals, and the pressure tubes are provided with the digital display meter. The temperature sensing probe is in butt joint with the test tube by rotating the assembly sliding block, the temperature sensing probe monitors the temperature change of the hole sealing material in the forming period in real time, the test tube is immersed into the water storage bin after the hole sealing material is formed, and the sealing performance of the hole sealing material in the test tube with radial cracks can be detected.

This utility model discloses a feeding device for PVC pipe production, comprising: an extruder body; a storage silo connected to the feed inlet of the extruder body; a feeding silo located on one side of the extruder body; a negative pressure pipe connecting the feeding silo and the storage silo, wherein a negative pressure fan is connected to the negative pressure pipe; and a weighing component located on the feeding silo for weighing materials. The advantages of this utility model are that it allows for the sequential weighing of different materials using the weighing component, resulting in accurate weighing data, avoiding uneven material proportions that could affect product quality, filtering materials to prevent clumping and impurities from entering, thus improving production quality, facilitating impurity removal, and increasing work efficiency.

The concrete powder stable supply system comprises a conical tank body and a pressure pump, the tank body is sealed, the bottom of the tank body is connected with a control chamber, a rotator is arranged in the control chamber, the top of the tank body is provided with a pressure pipe, the bottom of the control chamber is connected with a driving pipe, and the driving pipe is connected with the pressure pump. An accelerator is loaded into the vacuum tank body, uniform pressure is applied through the pressurizing pipe, output of the accelerator is controlled, the accelerator can rotate uniformly through the rotator, and the accelerator can be conveyed to the control chamber through the pressurizing pipe, so that the accelerator can be conveyed to the control chamber, and the accelerator can be conveyed to the control chamber. The quantitative accelerator and pressurized gas output and input by the pressure pump are mixed and guided into the concrete through the mixing pipe, so that when the powdery accelerator is guided into the flow-state concrete pressure pipe of the sprayed concrete pouring device, the powdery accelerator can be quantitatively supplied, and the accelerator-transported concrete under the pressure can be uniformly distributed and stirred.