1140 results about "Pressure - action" patented technology

The invention provides an air tightness detection device of a pressure balance type plug valve, and relates to the technical field of valve air tightness detection. An air tightness detection device of a pressure balance type plug valve comprises a water pool, an adjusting mechanism, two clamping mechanisms and an end sealing mechanism, the end sealing mechanism comprises two groups of positioning assemblies and two groups of sealing assemblies, and the positioning assemblies and the sealing assemblies are communicated and used for enabling the sealing assemblies to generate axial displacement. The sealing assembly is coaxially arranged in multiple layers, the structures of all the layers of the sealing assembly are the same, the sealing assembly is used for being inserted into an inlet and an outlet of a plug valve to be detected, and by means of the multi-layer design of the sealing assembly and the design that the positioning assembly enables each layer of the sealing assembly to generate independent axial displacement, the plug valve to be detected can be detected. The sealing assembly is adapted to plug valves to be detected with different calibers; the sealing assembly has the action of expansion under the action of air source pressure, so that the part inserted into the plug valve to be detected is in sealed connection with the plug valve, and the sealing performance is ensured.

The present invention discloses an ultrasonic flaw detection device for alloy die castings, including an operating table and an ultrasonic flaw detection host, wherein the ultrasonic flaw detection host is fixed on the operating table, and a flaw detection component is arranged above the operating table, wherein the flaw detection component includes a movable frame, a mounting frame, an inclined plate, a detection probe, a ball, a cross bar, and a second spring, and a mounting frame is arranged on the front side of the movable frame. In the use process of the ultrasonic flaw detection device for alloy die castings, when the movable frame moves downward to drive the top block to move downward to contact with the workpiece, the coating roller contacts with the workpiece, and the top block is forced to move relative to the fixed frame, and the action of the piston, the cylinder, the one-way air inlet valve, the one-way air outlet valve and the conduit can make the air in the cylinder enter the coupling agent storage barrel, and the coupling agent in the coupling agent storage barrel can be discharged to the coating roller through the action of air pressure, and the coating of the coupling agent can be realized by moving the device downward to make the coating roller roll, so as to carry out the detection.

The laser cutting machine for the door plate comprises a workbench, a supporting rack is arranged in an inner cavity of the workbench, a sliding groove is formed in the front side of the upper end of the workbench, a driving assembly is arranged in the sliding groove, the outer surface of the driving assembly is in threaded connection with an adjusting frame, a metal plate is placed on the supporting rack, and the adjusting frame is in threaded connection with the supporting rack. A pushing assembly is arranged on the rear side of the upper end of the workbench, a positioning plate is fixedly installed at the front end of the pushing assembly, and a groove is formed in the upper side of the front end of the positioning plate. Compared with the prior art, the leveling device has the advantages that when the leveling pressing plate moves downwards, the left end and the right end of the metal plate are pressed and positioned, and the pressure effect can flatten the tiny fluctuating or twisting part of the metal plate, so that the metal plate is smoother, and the two ends of the metal plate are prevented from tilting up; and leveling of the metal plate is beneficial to subsequent cutting machining operation, and the machining precision and the product quality are improved.

The invention provides a metal part assembling tool and method, and relates to the technical field of bearing press fitting, and the assembling tool comprises a bearing rotating pedestal, a central supporting rod shaft, a tool table, a press fitting barrel mechanism and a plurality of shaft body clamping parts. The tool table is rotatably arranged on the bearing rotating pedestal, and the periphery of the tool table is divided into a feeding area, an assembling area and a discharging area. The method comprises the steps that a shaft body part is placed in a tool step groove in a feeding area and is positioned and clamped by a shaft body clamping component; in the assembling area, the cylinder press-fitting mechanism adsorbs the bearing parts through an electromagnetic suction ring, and the center of the bearing parts is aligned with the positioning column assembly by aligning the clamping and pressing part; the press-fitting cylinder drives the press-fitting cylinder to press downwards, the pressure measuring induction block is triggered after the positioning column assembly makes contact with the shaft body part, the electromagnetic suction ring is controlled to be powered off, clamping and pressing are released, and the shaft body part is automatically sleeved with the bearing part under the action of pressure. And finally, the assembly body rotates to a discharging area to complete discharging. Full-automatic, high-precision and continuous assembly of the bearing and the shaft body is achieved.

The present invention relates to a check valve, in particular of a hydrogenation installation, having an inlet and an outlet which define a flow direction which extends from the inlet to the outlet. The check valve has a piston (6) movably arranged relative to the inlet and the outlet to open and close the inlet of the check valve, where the piston (6) defines a piston axis (63) by means of a first end facing the inlet and a second end facing the outlet. The piston (6) has an outer surface along which a fluid flowing through the check valve in a flow direction flows. The outlet has outlet channels (35) in order to enable the fluid to flow outward from the check valve, all outlet channels (35) of the outlet running obliquely with respect to the piston axis (63). The check valve can be used for high pressure and allows soft closing even in the event of a reversal of the pressure action. The check valve is used in particular in hydrogen refueling stations.

The invention relates to the technical field of deep sea equipment engineering, and discloses a pressure energy power cylinder and an action control method thereof.The pressure energy power cylinder comprises a sealing cylinder body, a piston rod and an underwater control piece; the piston rod comprises a push rod and a piston connected to the bottom end of the push rod, the top end of the push rod slidably and hermetically penetrates through the top end of the sealed cylinder body, and the piston divides a cavity of the sealed cylinder body into a rod cavity and a rodless cavity; the underwater control piece is installed at the bottom of the sealing cylinder body and can be driven to be switched on and switched off under the action of external pressure, so that the rodless cavity is communicated with or disconnected from the outside. The pressure energy power cylinder passes through the deep sea underwater control part. By the adoption of the technical scheme, the rodless cavity is communicated with the outside by controlling on-off of the underwater control piece under the external action, so that the power cylinder can stably output power, energy does not need to be additionally provided, and the device is simple in structure, free of a motor, a pumping system and a complex control system, easy to implement, safe and reliable.

The invention relates to the technical field of oil development, in particular to a shale oil and gas fracturing sliding sleeve capable of being opened and closed repeatedly and a using method. According to the technical scheme, a central pipe fracturing liquid inlet is formed in the upper side of a central pipe, and a reversing rail is arranged on the surface of the outer wall of the middle; a sealing cylinder sleeve and a one-way circulating valve carrier are sleeved outside the central pipe, a fracturing piston, a swivel pressing cap and a reset spring are installed in an annulus, a constant-pressure opening cavity is formed in the inner wall of the fracturing piston, a swivel is installed in the swivel pressing cap, a track pin is installed in the swivel, and the position is moved along a reversing track on the surface of the outer wall of the central pipe through the track pin. The fracturing piston moves downwards to the position of the cylinder sleeve fracturing liquid outlet under the action of pressure, the fracturing function is started, fracturing liquid is sprayed out along the cylinder sleeve fracturing liquid outlet to enter a target fracturing layer, fracturing construction of a plurality of fracturing layers can be achieved through multiple times of fracturing liquid injection and injection stopping, the fracturing sliding sleeve can be repeatedly opened and closed, and the fracturing construction efficiency is improved. And fracturing construction requirements of shale oil and gas with different layers can be met.

The invention discloses an end socket forge piece forming device and a demolding method, belongs to the technical field of end socket manufacturing, and solves the problem that an existing end socket forge piece is difficult to demold. The end socket forge piece forming device comprises a punch, a punch connecting frame and a transition connecting plate. The punch comprises a punch connecting part and a punch punching part fixedly arranged on the lower surface of the punch connecting part; the punch connecting frame is connected with the press movable cross beam, the upper end of the transition connecting plate is connected with the punch connecting frame, and the lower end of the transition connecting plate is connected with the punch connecting part; a second vertical pin hole is formed in the punch connecting part and located above the end socket forge piece. During punching, the movable cross beam of the press drives the punch connecting frame and further drives the punch to press down; and after punching is finished, the transition connecting plate is detached, the position of the second vertical pin moves downwards, the second vertical pin makes contact with the two ends of the end socket forge piece, pressure acts on the end socket forge piece, and demolding of the end socket forge piece and the punch is achieved. When the device is used for demolding, the demolding efficiency is high, and the demolding effect is good.

The invention discloses a pipeline connection flange with a pressure-resistant structure, which is characterized in that a driving mechanism in a fixed cylinder is matched with a lacing wire structure on the peripheral side through a plurality of reinforcing pieces to form a firm supporting system, so that stress can be effectively dispersed when a flange plate bears external pressure, and the pressure resistance of the flange plate is improved. And the damage risk caused by local stress concentration is prevented. Under the action of pressure, the reinforcing piece can uniformly distribute external force to the periphery of the fixing cylinder, so that excessive concentration at a certain point is avoided, and the possibility of material fatigue and yield is reduced. And meanwhile, the overall supporting capacity is further enhanced through the tie bar structure, a force transmission network is constructed, connection between the assemblies is more stable, and the overall strength is improved. According to the structural optimization, the flange plate can still keep good performance under the high-load working condition through a reinforced support and stress dispersion mechanism.

The invention discloses an engineering geology grouting reinforcement device, and relates to the field of geology grouting reinforcement, the engineering geology grouting reinforcement device comprises a mounting rack, the mounting rack is fixedly connected with a first telescopic driving part, the output end of the first telescopic driving part is fixedly connected with a mounting plate, and the mounting plate is fixedly connected with a grouting pipe. The grouting pipe is used for pressurizing and grouting, so that the grout enters a reinforcing gap under the action of pressure; after filling is conducted for a period of time, the injection-compression pipe moves downwards, the sealing plate blocks the grouting opening under the action of the spring to prevent grout from flowing back, meanwhile, the injection-compression pipe moves downwards to extrude the grout, the extrusion force is further increased, and geological gaps are filled with the grout more sufficiently. Through the reciprocating operation, the geological reinforcement position can be fully grouted, the stability and strength of the geological structure are effectively enhanced, the quality and reliability of grouting reinforcement are greatly improved, and the reinforcement requirement under the complex geological condition is met.

The invention discloses a high-pressure large-diameter self-closing valve, which relates to the technical field of wedge gate valves and comprises a valve body, an end cover is hermetically connected to the middle of the top of the valve body, a control wheel is rotatably connected to the center of the top surface of the end cover, valve ports are fixedly connected to two ends of the valve body, and a wedge self-closing valve core is arranged on the inner side of the valve body. The control wheel is used for controlling the position of the wedge type self-closing valve element, the position, close to the wedge type self-closing valve element, of the inner side of the valve body is fixedly connected with an inclined seat matched with the wedge type self-closing valve element, a control mechanism is arranged on one face of the valve body, the control mechanism controls high-pressure fluid in the valve body, and the pressure of the high-pressure fluid acts on the top face of the wedge type self-closing valve element. The high-pressure fluid in the valve body is controlled through the control mechanism, the high-pressure fluid acting on the top face of the wedge type self-closing valve element is isolated, in this way, the pressure of the high-pressure fluid in the valve body directly acts on the inner side of the wedge type self-closing valve element, and the position of the wedge type self-closing valve element in the valve body is convenient to control.

The utility model belongs to the technical field of injection molding, and particularly relates to a self-sealing type hot runner structure which comprises a hot runner body, a hot runner is arranged in the hot runner body, one end of the hot runner is communicated with a nozzle of an injection molding machine, the other end of the hot runner is provided with a sprue gate, a spreader and an elastic piece are arranged in the hot runner, and a valve rod is arranged on the spreader in a sliding mode. A plug is arranged at one end, far away from the spreader, of the valve rod, and opens the sprue gate under the elastic action of the elastic piece during injection molding; and when injection molding is completed, the plug overcomes the elasticity of the elastic piece under the action of pressure to plug the sprue gate. The cost of parts is low, the valve rod is short, machining is convenient, and the machining cost is low; and the molten plastic cannot impact the valve rod frontally, so that the property change of the plastic cannot be caused, and the product quality is good.

What is disclosed in the present invention is a self-locking hook to avoid unexpected opening. When a press-button is pressed down, a spring is compressed, a pressing arm and an axle pin are completely inserted into an insertion hole, at this point, the axle pin leaves a transverse clipping position and forms an openable state with a support arm, in which they can rotate along the curved slide rail in a mounting slot. An elastic arm is mounted inside the mounting slot and is pressed upon the bottom surface of the support arm to push a lock hook and maintain the locking state between a lock arm and a hook arm. The lock hook be rotated only when the press-button is pressed down. The present invention can avoid direct opening of the lock hook under a pressing force, thus preventing unexpected opening and loosening of the hook.

A wedge-shaped gap exists between the top of an upper-layer coil bar and the top of a lower-layer coil bar, a wedge-shaped ejector is placed in the wedge-shaped gap, an ejection oil cylinder is arranged in the wedge-shaped ejector, and the wedge-shaped ejector is in an L shape and is provided with a vertical guide rail. And the guide rail is connected with the wedge-shaped device in a sliding manner and can be driven to move downwards by an ejector moving-down motor. An ejection oil cylinder of the wedge-shaped ejector is used for carrying out ejection operation on an upper-layer winding bar, a back-pressure device is arranged outside the upper-layer winding bar so that ejection operation can be assisted through ejection and back-pressure alternate operation, installation operation of the winding bar can also be carried out through back-pressure, and ejection and back-pressure actions are controlled through an electric hydraulic pump. The wedge-shaped interval is enlarged through ejection operation, the wedge-shaped ejector can be driven by an ejector downward moving motor to descend to enable the ejection face to move downwards till complete ejection is achieved, the ejection operation of the device can be automatically controlled through a control device, the labor intensity of manual prying in the past is greatly reduced, and damage to a winding bar is reduced.

The invention discloses a laying device and laying method for a rain and sewage diversion covering material in a fly ash landfill reservoir area, and relates to the technical field of laying of landfill reservoir area covering materials.The laying device comprises a bottom plate and a fixing frame, main wheels are arranged on the two sides of the fixing frame, and a winding roller is arranged in the fixing frame; and the geomembrane material is wound on the circumferential outer wall of the winding roller. In the rotating process of a second rotating column, multiple sets of cams on the outer wall of the second rotating column can be driven to rotate together, at the moment, through extrusion between the cams and rolling wheels, pressure can act on a rotating frame and a pressing roller, and then secondary pressing on a geomembrane material can be achieved through the pressing roller; the stability of geomembrane materials laid in a reservoir area is guaranteed, the faster the device rolls, the larger the centrifugal force borne by the cam is, then the larger the pressing force applied to the rolling wheel is, and therefore the pressing force of the pressing roller on the geomembrane materials changes along with the rolling speed of the device.

The embodiment of the utility model relates to the technical field of electromagnetic valves, and discloses a high-temperature electromagnetic valve group. The high-temperature electromagnetic valve set comprises a plurality of electromagnetic valves, a plurality of main valves, a high-temperature fuel oil channel, a cold oil channel and a first channel. The plurality of main valves are respectively connected with the plurality of electromagnetic valves one by one, each electromagnetic valve comprises an electromagnetic valve upper valve seat, an electromagnetic valve lower valve seat, an electromagnetic valve upper valve core and an electromagnetic valve lower valve core, each electromagnetic valve is connected with an electromagnetic valve upper channel and an electromagnetic valve lower channel, and each main valve comprises a main valve pilot cavity and a main valve piston; and the high-temperature fuel oil channel comprises a high-temperature fuel oil inlet and a plurality of high-temperature fuel oil outlets, high-temperature fuel oil is introduced into inner cavities of the main valves through the high-temperature fuel oil inlet, and when the electromagnetic valves are powered off, the main valve pistons move upwards under the pressure action of the high-temperature fuel oil, the main valves are opened, and the high-temperature fuel oil flows out through the high-temperature fuel oil outlets. According to the device provided by the embodiment of the invention, the oil consumption of the high-temperature electromagnetic valve group can be reduced.

The invention relates to the technical field of cross shafts, and discloses an efficient lubricating needle bearing cross shaft which comprises a cross center part, a first oil injection assembly is arranged on the cross center part, a second oil injection assembly is arranged in the cross center part, and the first oil injection assembly comprises an oil injection nozzle. A first oil cavity is formed in the cross-shaped center part, and a first oil injection groove is formed in the cross-shaped center part. According to the efficient lubricating needle bearing cross shaft, a grease gun is used, an oil outlet of the grease gun is tightly pressed on an oil injection nozzle, it is ensured that lubricating oil enters a first oil cavity through the oil injection nozzle under the pressure effect, and a first sealing plate and a first spring move downwards to the position below a communicating hole channel under the pressure effect; and meanwhile, after the second oil cavity is filled with the lubricating oil, the first oil cavity is slowly filled with the lubricating oil, the lubricating oil flows out of the first oil injection groove, and primary oil injection can be achieved.

The invention discloses a hydraulic oil cylinder with an axial supporting protection function, and belongs to the technical field of hydraulic cylinders, the hydraulic oil cylinder comprises an outer cylinder body, an oil cylinder rod and a first piston, a center oil cavity is formed in the outer cylinder body, the first piston is fixedly connected to the bottom of the oil cylinder rod, and the oil cylinder rod and the first piston are both slidably connected to the interior of the center oil cavity; a pressure buffering structure is connected into the outer cylinder body, when the oil cylinder rod bears pressure, the pressure buffering structure and the magnetic supporting structure are matched with each other to jointly share the pressure borne by the oil cylinder rod, a supporting rod in the magnetic supporting structure can transmit the pressure of the oil cylinder rod to a second piston, and therefore the oil cylinder rod is prevented from falling off. The second piston slides downwards in the storage cavity and extrudes the magnetorheological fluid, the stress of the oil cylinder rod is relieved through the buffering characteristic of the magnetorheological fluid, and therefore protection on the oil cylinder rod is effectively enhanced, and the stability and reliability of the hydraulic oil cylinder under the pressure effect are improved.

The invention provides a carbon dioxide capture system based on a calcium-based granular material and a control method of the carbon dioxide capture system. The system comprises a reactor, a decomposition bin, a conveying branch and an input branch, the input branch inputs raw flue gas to the reactor; the conveying branch conveys a calcium-based particle material to the reactor by using the heated flue gas; the reactor is used for controlling the internal temperature by selecting the raw flue gas input by the input branch so as to control the adsorption reaction; the decomposition bin is used for controlling the movement of the supporting plate under the mechanical action and the air pressure action so as to guide the flowing of the materials and further control the desorption reaction. A set of complete and ingenious heat circulation process and material circulation process is constructed, the circulation processes are linked with each other, the structural design is ingenious and practical, and while efficient adsorption and desorption of carbon dioxide are guaranteed, the energy utilization efficiency is improved, the energy consumption is reduced, and the equipment maintenance cost and the energy purchase cost are reduced.

The jacking device comprises a top pipe joint, a plurality of jacking pipe joints, a jacking assembly, a jacking rack and a retaining supporting component, the jacking assembly is used for vertically jacking the top pipe joint or the jacking pipe joints, and the upper surface of the jacking rack is close to the bottom of a jacking pipe cover of a pipe piece structure; the retaining supporting component is located on the upper surface of the jacking rack and used for temporarily supporting the lower pipe opening of the jacking pipe joint which is jacked in place, so that the jacking assembly retreats to the initial position to jack the next jacking pipe joint, automatic falling of the vertical pipe under the action of self weight and jacking section soil pressure can be effectively prevented, and construction safety and reliability are guaranteed.

The utility model relates to the technical field of ball valves, in particular to a grease injection structure of a forged steel fixed ball valve, which comprises a main valve body, a ball body and a valve seat component, a first grease injection channel is arranged in the main valve body, a second grease injection channel is arranged in the valve seat component, and the first grease injection channel is communicated with the second grease injection channel; the second grease injection channel comprises an infusion section and a sealing section, an opening of the infusion section faces the sealing face of the ball body, an opening of the sealing section is communicated with the containing cavity channel, sealing rubber is arranged in the sealing section, the sealing rubber can slide in the sealing section under the pressure effect of a medium, and baffle rings are further arranged at the two ends of the sealing section. The baffle ring is used for limiting the sealing rubber to only slide in the sealing section, and the first grease injection channel communicates with the infusion section. Compared with a traditional operation mode that sealing grease is supplemented after shutdown, continuity of pipeline production operation can be guaranteed, the interval time of grease injection maintenance is remarkably prolonged, and the working intensity of operators is reduced.

The utility model relates to the technical field of fire fighting equipment, and discloses a fire hose quick connecting and sealing device which comprises a connecting male head, the outer side of the connecting male head is sleeved with a connecting female head, the outer side of the connecting female head is fixedly sleeved with a fixing seat, a cavity is formed in the fixing seat, and a piston mechanism is arranged in the cavity; a sealing seat is arranged on the inner wall of the female connector, a mounting groove is formed in the inner wall of the sealing seat, a sealing mechanism is arranged in the mounting groove, a groove is formed in the outer side of the male connector, and a limiting mechanism is arranged between the groove and the female connector. Compared with the prior art, the fire hose has the following advantages and effects that by arranging the sealing mechanism, a tiny gap between the connecting male head and the connecting female head can be effectively filled through the expanded sealing air bag, the purpose of preventing fire fighting water from leaking from the connecting part under the pressure effect is achieved, and therefore the sealing performance and reliability of the fire hose during water passing are guaranteed, and the service life of the fire hose is prolonged. And a powerful guarantee is provided for smooth fire-fighting operation.

The invention provides an internal flow field balancing device for a high-temperature and high-pressure closed container. Comprising a pulley, a transmission mechanism, a clutch, a turbulent flow mechanism, a frequency modulation motor, a sealed cabin, a pressure maintaining cabin and a pressurizing device, a rotating cage is arranged on the pulley and is driven to rotate through a rotating mechanism; a tray is hung on the rotating cage, and an accommodating object is accommodated on the tray; the transmission mechanism is arranged at the closed end of the tank body; one end of the clutch is connected with the transmission mechanism; the turbulence mechanism is provided with a transmission shaft, blades, a driving gear and a sealing ring are arranged at the extension end of the transmission shaft, the blades are used for adjusting airflow distribution in the tank body, and the driving gear is connected with the input end of the transmission mechanism and used for driving the transmission mechanism; the sealed cabin is arranged outside the sealing head at the closed end of the tank body; the pressure maintaining cabin is arranged on the outer side of the sealed cabin, and a sealing ring is arranged in an inner cavity, adjacent to the pressure maintaining cabin, of the sealed cabin. The pressurizing device is connected with the pressure maintaining cabin, and pressure of the pressurizing device acts on the outer side of the sealing ring to maintain pressure balance on the two sides of the sealing ring.

The utility model provides an autoclaved flyash-lime brick forming device, which relates to the technical field of autoclaved flyash-lime bricks and comprises a base and a working mechanism, the working mechanism is fixedly connected to the inner side of the base, an adjustable eccentric shaft is driven by a high-power motor to rotate through the arrangement of a dynamic vibration compaction assembly, and the dynamic vibration compaction assembly is driven by a high-power motor to rotate. The centrifugal force is generated, the vibration effect is triggered through the fixed eccentric block, materials are subjected to efficient vibration compaction, the height of the supporting assembly is adjusted according to actual requirements, a stable supporting foundation is provided for the mold assembly, and after the mold assembly is filled with the materials, the mold assembly can be shaped into the needed product form under the pressure effect. The power assembly provides precise power output for the whole device and drives other assemblies to complete corresponding actions, the profiling assembly is driven by the power assembly, a telescopic column conducts telescopic motion in the vertical direction, force is transmitted to a profiling block through a connecting bottom plate, the profiling block exerts pressure on a workpiece so as to achieve extrusion and shaping, and the profiling assembly is driven by the power assembly to conduct telescopic motion in the vertical direction. The quality and the shaping effect of a final product are ensured.

The present invention relates to the field of valve technology, and proposes a pressure protection cut-off valve, comprising a valve body, a valve seat fixed to the top of the valve body, a hand plate rotatably arranged on the top of the valve seat, a main valve stem fixed to the bottom of the hand plate and threadedly connected to the valve seat, and a valve core arranged at the bottom of the main valve stem, wherein the bottom of the main valve stem is provided with a secondary valve stem capable of vertical telescopic sliding, the valve core is located at the end of the secondary valve stem, and the valve core is filled with a fluid for synchronously responding to the pressure change in the valve body; in the present invention, when the pressure in the valve cavity exceeds the set value, the elastic membrane contracts due to the pressure, and then the fluid in the liquid storage cavity acts on the air control component, which is then fed back to the actuator, and the secondary valve stem is driven by the actuator to slide downward relative to the main valve stem, thereby realizing pressure protection of the valve body. Compared with the prior art, the present invention adopts a layout form in which the flow and the medium in the valve body are separated, which solves the problem that the operation in the prior art is relatively complicated and there is a risk of medium leakage.

The invention discloses a model test device for simulating a diffusion rule of single-fracture grouting slurry, a lower boundary pressure plate and an upper boundary pressure plate are sequentially mounted in a flat plate placement groove in a sliding fit manner, and the lower boundary pressure plate is attached to the bottom wall of the flat plate placement groove; the flat plate placement groove is connected with a fixed frame, the gap adjusting assembly is movably connected with the fixed frame, an elastic part is arranged between the gap adjusting assembly and the fixed frame, the gap adjusting assembly is pressed on the surface of the upper boundary pressing plate, and a crack simulation space is formed between the upper boundary pressing plate and the lower boundary pressing plate. According to the invention, the gap adjusting assembly is arranged, so that the gap between the upper boundary pressing plate and the lower boundary pressing plate can be adjusted, and simulation tests can be carried out aiming at fractures with different sizes; by arranging the adjusting bolt and the adjusting nut, the upper boundary pressing plate can push the adjusting bolt to slide on the mounting plate to a certain extent under the action of grouting pressure during a test, so that the condition that the crack can change is simulated.

The utility model provides a reciprocating spring seal with low starting force, which relates to the technical field of spring seals and comprises a sealing jacket and a spring, and the sealing jacket sequentially comprises an outer sealing lip body and an inner sealing lip body from outside to inside. When the spring seal is used and a system does not have pressure, the spring provides initial sealing force for the spring seal to enable the lip of the sealing jacket to be tightly attached to a working face to prevent low-pressure leakage, and when the system has pressure, medium pressure acts on all directions in the groove of the spring seal to enable the lip to be tightly attached to a sealing face to prevent low-pressure leakage. The spring seal has the effects of large shrinkage, low load and uniform sealing force, meanwhile, the sealing lip is allowed to be properly abraded, the use cost of the spring seal is reduced, certain shaft jump and deviation can be corrected, and the service life of the spring seal is prolonged. The spring plug seal does not need to provide relatively large starting force during rotary starting, and is more suitable for rotary and reciprocating sealing.

The invention relates to a duct plugging device for bridge prestressed duct grouting, and relates to the field of bridge construction engineering, the duct plugging device comprises a plugging mechanism and a grouting mechanism, the plugging mechanism is provided with a grouting channel, the plugging mechanism comprises a plugging cylinder and an extrusion plate, the grouting channel is arranged on the plugging cylinder, and the grouting channel is located on a moving path of the extrusion plate; the grouting mechanism abuts against the extrusion plate, a piston cavity is formed in the plugging barrel, a piston block is slidably connected into the piston cavity, an elastic film is arranged on the plugging barrel, the elastic film and the plugging barrel are spliced to form a deformation cavity, the deformation cavity communicates with the piston cavity, and a one-way air inlet assembly is arranged on the plugging barrel. In the construction process, an extrusion plate moves in the direction close to the grouting mechanism under the pressure effect of concrete in the hole channel, the extrusion plate drives a piston block to extrude gas in a piston cavity, the gas in the piston cavity enters a deformation cavity, an elastic film deforms and expands, a gap between a plugging barrel and the inner wall of the hole channel can be filled easily, and leakage of concrete grout is reduced.

The utility model discloses a steam-water container which comprises a pressure tank body, an inner cavity is arranged in the pressure tank body, an air inlet nozzle, a water inlet nozzle and a water outlet pipe are arranged on the upper portion of the pressure tank body, the air inlet nozzle and the water inlet nozzle are communicated with the upper portion of the inner cavity of the pressure tank body, and the lower end of the water outlet pipe extends to the lower portion of the inner cavity. The steam-water container is a pressure tank body and has good sealing performance, meanwhile, gas and water are fed from the upper portion, carbon dioxide and water start to be mixed on the upper portion of the inner cavity when entering the tank body, certain air pressure is formed on the upper portion of the inner cavity, and when the water level is higher than the lower end opening of the water outlet pipe, the water outlet pipe is opened; and water in the tank body enters the water outlet pipe under the action of pressure and is discharged without additional power.

The invention provides an underwater high-pressure dry type welding cabin test verification method, and relates to the technical field of sunken ship salvage, and the method comprises the following steps: testing the sealing performance and effectiveness of a magnetic adsorption mechanism and a rubber seal on a welding cabin under the 300-meter environmental water pressure under the action of the designed magnetic adsorption force and the 5-meter internal and external pressure difference; testing the sealing performance of the watertight door on the welding cabin under the environment water pressure of 300 meters, including testing the effectiveness of opening and closing of the sealing door and the effectiveness of sealing of the sealing door; according to the invention, subsystem process tests such as a high-pressure adsorption sealing test, a watertight door high-pressure functional test, an air pressure control system high-pressure test, a propulsion ballast system shallow water test, a robot high-pressure action test, a welding process laboratory inspection and the like, a pool test of an integrated system, a shallow water functional test and a final sea test are carried out; a scientific, rigorous and complete test verification system is formed, and the feasibility of the underwater high-pressure dry-type welding cabin is fully proved.