18results about How to "Avoid depressurization" patented technology

The present invention discloses a filling device for controlling surface subsidence in a coal mine, which can effectively ensure the filling effect and prevent collapse. At the same time, slurries with different viscosities or concentrations are set, which can effectively realize the filling of slurries in gaps. Moreover, slurries with high viscosity or concentration are supplemented with pressurization by a rotating drive mechanism, which can effectively realize the pressurization of slurries with low viscosity, improve the pressurization capacity and filling effect, and realize effective filling of gaps.

The invention discloses an air-tight seal integral swash plate check valve, and relates to the technical field of fluid valves. The problems that a traditional check valve is poor in sealing performance, short in service life, low in operation flexibility and the like are solved. By introducing a retarding reset spring and a buffering lead screw, the damage of impact force to the valve clack is obviously reduced; the pneumatic pump provides a positive pressure environment to improve the sealing effect; flexible switching of flow paths is achieved through the three-way switching design; and meanwhile, automatic and manual operation is supported. The air pressure in the pressure maintaining shell is monitored in real time, and the system safety is ensured. The valve is reasonable in structure, rich in function and suitable for efficient fluid conveying and control under complex working conditions.

The invention discloses a nuclear power main pump active type parking sealing nitrogen tank pressure relief method which comprises the steps that S1, a containment isolation valve on a nitrogen supply pipeline of an SGN system is opened, and a temporary pressure relief device is installed on a quick connector on the downstream of an exhaust pipeline of the SGN system; s2, an exhaust valve on the exhaust pipeline is opened, the exhaust pipeline and a containment isolation valve are communicated, and the main pump active type parking sealing nitrogen tank conducts pressure relief through the containment isolation valve and the exhaust valve; s3, when the pressure of the temporary pressure relief device is displayed as 0 MPa. G, the exhaust valve is closed; and S4, closing the containment isolation valve, and observing the pressure change of the main pump active type parking sealing nitrogen tank. The pressure of the active parking sealing nitrogen tank is effectively reduced, important equipment related to nuclear safety is protected, and the pressure of the whole nitrogen supply pipeline can be adjusted to meet the system requirement; and the abnormal working condition of the active parking sealing nitrogen tank can be quickly responded.

The utility model discloses a continuous pressurizing device which comprises a continuous pressurizing assembly which comprises an air bag, an air outlet head communicated with the bottom face of the air bag, an air inlet head communicated with the side face of the air bag and a to-be-tested instrument tube arranged below the air bag. A connecting assembly, the connecting assembly comprises a round pipe arranged below the air outlet head, a threaded pipe communicating with the round pipe, a first groove opening formed in the outer wall of the round pipe, a connecting pipe arranged below the threaded pipe, a first internal thread formed in the connecting pipe, an annular baffle fixed to the outer wall of the connecting pipe and a conical connector communicating with the connecting pipe. The air inlet pipe is arranged at the air inlet head; and the valve is connected with the air inlet pipe. According to the utility model, the continuous pressurizing assembly and the connecting assembly are matched with each other, so that long-time continuous air pressure can be provided under the condition of no power supply, even if air inlet is interrupted, continuous pressurizing can still be ensured, the use is convenient, the cost is low, and the chromatography efficiency of the chromatographic column is improved.

The utility model discloses a water pump of a novel oral irrigator, which comprises a pump body, an elastic pump membrane movably arranged in the pump body, a driving device used for driving the elastic pump membrane to reciprocate in the pump body, and a driving rod connected with the driving device and the elastic pump membrane, an umbrella-shaped valve used for one-way circulation is arranged between the water inlet cavity and the water outlet cavity, and a water inlet valve block used for one-way circulation is arranged at a water inlet of the water inlet cavity. A traditional piston is replaced with the elastic pump membrane, reciprocating motion of the piston is replaced with elastic stretching and compression of the elastic pump membrane, the tightness of the structure can be greatly improved, larger pressure can be generated, frictional wear cannot be generated, water leakage cannot occur after long-term work, and the service life is greatly prolonged.

The invention discloses a land surveying and mapping calibration device convenient to operate, and belongs to the technical field of land surveying and mapping calibration. A pressing plate is horizontally and fixedly mounted at the top end of the inserting rod, a mounting rod is vertically and fixedly mounted on the top wall of the pressing plate, and a marker post is arranged at the top end of the mounting rod; in the process that the threaded rod is rotated to adjust the height of the marker post, the piston rod moves downwards, on one hand, the deep anchoring clamping rod is mechanically driven to transversely stretch out to penetrate into soil according to the wedge-shaped principle, and deep anchoring is formed; on the other hand, the piston rod serves as an air pump piston to compress air in the cavity, the pneumatic telescopic rod on the earth surface is driven by the air supply mechanism to stretch and abut against the ground, and triangular support of the wide base is formed. The composite fixing mode of deep ground gripping and ground surface foundation expansion effectively solves the problem that a traditional surveying and mapping rod shakes due to the fact that the head is heavy and the bottom is light, additional power sources or tedious operation steps are not needed, and the stability of the device under wind interference or soft soil is remarkably improved.

This utility model discloses a disassembly and assembly tool for a monorail crane braking device in coal mines, relating to the field of monorail crane braking technology. It includes a storage frame, a pneumatic oil pump, a shut-off valve, a cylinder, and a disassembly bracket. The storage frame houses the pneumatic oil pump, and the output end of the pump has a flexible oil pipe with a shut-off valve. The disassembly bracket is equipped with a cylinder, one end of which is connected to the cylinder's inlet. The cylinder's output end is located inside the disassembly bracket and is fitted with a pusher. The disassembly bracket has a positioning component, allowing for detachable assembly and disassembly of the disassembly bracket to the storage frame. This utility model positions the braking device using the disassembly bracket, and then the pneumatic oil pump provides braking force to the cylinder, causing the pusher at the cylinder's output end to compress the brake cylinder spring. This exposes the brake cylinder fixing nut located inside the brake cylinder spring, allowing for the disassembly and assembly of the brake cylinder and brake cylinder spring.

The utility model provides an atomization device of carbonated water manufacturing equipment, and belongs to the technical field of carbonated water manufacturing equipment. The problem of how to improve the carbonation effect is solved. The atomization device comprises a valve body with a water inlet and a water outlet at the two ends respectively, a connector with a water inlet hole and a water outlet hole is in threaded connection with the water outlet, an atomization head is arranged in the valve body, a threaded portion is arranged on the periphery of the atomization head, and the atomization head is located in the water inlet hole and is in threaded connection with the inner circumferential face of the water inlet hole through the threaded portion. The input end of the atomization head is communicated with an inner cavity of the valve body, the output end of the atomization head is communicated with the water outlet hole, a one-way valve element is further arranged in the valve body and located between the water inlet and the atomization head, a spring is further arranged between the one-way valve element and the atomization head, and one end of the spring abuts against the one-way valve element and enables the one-way valve element to block the water inlet. And the other end of the spring is propped against the upper end part of the atomizing head. According to the device, the one-way valve core and the atomizing head are integrally designed, so that the carbonation effect is greatly improved.

A water pressure testing device, a clamping mechanism for clamping the product to be tested is installed on the workbench, a water pump is used to pump water in the water tank into the sealed pressure tank, an air pump is used to supply pressurized air to the sealed pressure tank, a first valve is arranged on the air path between the air outlet of the air pump and the air inlet of the sealed pressure tank, a second valve is arranged on the water path between the water outlet of the water tank and the water inlet of the sealed pressure tank, a third valve is arranged on the air path between the air outlet of the sealed pressure tank and the air inlet of the product to be tested, a fourth valve is arranged on the water path between the water outlet of the sealed pressure tank and the water inlet of the product to be tested, and a fifth valve is arranged on the water path between the water outlet of the product to be tested and the water tank. The water pressure testing device pressurizes the inside of the product to be tested with the air pump, the pressurization speed is faster, there is almost no loss of test water during the pressurization process, and the air pressure during pressurization is used for pressure relief and drainage, avoiding the need for additional equipment to depressurize the sealed pressure tank, and the structure is simple and reasonable.

The utility model discloses a distribution plate and spinneret plate assembling structure for industrial spinning, which comprises a distribution plate with distribution holes and a spinneret plate with spinneret holes, and the distribution holes and the spinneret plate are coaxially and hermetically spliced to form a melt cavity which enables the distribution holes to be communicated with the spinneret holes; a sealing piece is arranged at the splicing position of the distribution plate and the spinneret plate, and the distribution plate and the spinneret plate are connected in a feeding mode through the plate center connecting piece and are spliced in an opposite axial movement mode so as to extrude the sealing piece to seal a melt cavity. The distribution plate and the spinneret plate are assembled in a shaft connection mode through the plate center connecting piece, the tension effect opposite to the deformation trend direction is exerted on the spinneret plate, and therefore the spinneret plate is prevented from being affected by high-pressure and high-temperature working conditions to deform, the sealing performance is guaranteed, and the filament forming quality is improved.

The three-position deflection oil cylinder comprises a large piston rod and a small piston rod, the top end of the large piston rod is connected with a large piston through threads, the top end of the small piston rod is connected with a small piston through threads, the large piston and the small piston are located in a cylinder body, and an oil cylinder upper base and an oil cylinder lower base are arranged at the two ends of the cylinder body respectively. The small piston rod is sleeved with the oil cylinder upper base, the large piston rod is sleeved with the oil cylinder lower base, a first oil inlet is formed in the center of the top of the oil cylinder upper base, a third oil inlet is formed in the center of the top of the oil cylinder lower base, and a second oil inlet is formed in the center of the top of the surface of the cylinder body. In the moving process of the oil cylinder, balance and stability can be achieved, the structure is simpler, machining is more convenient, accurate control over multiple strokes can be achieved, the structure is safer, intercommunication oil mixing and pressure relief of a middle-position oil port in the oil cylinder can be well prevented through the adopted sealing mode, and the function failure of the oil cylinder after oil mixing is effectively prevented.

The utility model relates to the technical field of pet supplies, in particular to a dog and pet round interaction ball which mainly comprises a top cover, a soft rubber mat is arranged in the top wall of the top cover, a lower connecting assembly and a motor mounting assembly are arranged at the bottom end of the top cover, and the motor mounting assembly is arranged on the inner side of the lower connecting assembly. A polymer battery is arranged at the rear end of the inner side of the motor mounting assembly, and a power assembly is arranged at the front end of the inner side of the motor mounting assembly. According to the dog-pet circular interaction ball, the motor mounting assembly and the power assembly are arranged and located in the top cover and the lower connecting assembly, and the ball body is made to rotate irregularly under the control of the fixed control mainboard, so that the capturing reaction capacity of a pet dog is improved, the energy of the pet dog can be consumed, the situation that furniture is demolished vigorously is avoided, and the service life of the pet dog is prolonged. And the switch button controls the switch element of the fixed control mainboard, and after the switch element is turned on, the loudspeaker gives out a sound to attract the pet dog, so that the interest of the pet dog is improved.

The invention discloses a molecular sieve runner core processing and mixing device, and relates to the technical field of material mixing, the molecular sieve runner core processing and mixing device comprises a mixing tank, the lower part of the mixing tank is connected with a gluing groove, the upper part of the mixing tank is connected with a dosing cylinder, and a stirring device is arranged in the mixing tank; the stirring device comprises a pressing ring attached to the inner wall of the mixing tank in a sealed mode, the pressing ring can conduct piston motion along the inner wall of the mixing tank, quantitative extrusion of the materials is achieved, meanwhile, the materials in the mixing tank can be stirred, the pressing ring is driven to press downwards in a timing mode, and material supplementing is conducted in a timing mode. When the pressing ring presses the materials, the stirring piece stirs the materials, the materials in the tank are evenly spread, the materials can evenly block the discharging pipe before being discharged, it is ensured that the interior of the tank is in a positive pressure environment when the pressing ring moves downwards, and the situation that the materials above the discharging pipe are rapidly discharged, the interior of the tank and the discharging pipe are communicated, and then local material residues are caused after pressure relief is conducted is avoided.

The utility model relates to a sealing device for an aircraft tire high-water-pressure bursting test, and belongs to the field of tire pressure testing equipment. A water filling opening is formed in the rim body, an annular groove is machined in one side of the rim body, two annular sealing grooves are machined in the groove, sealing rings are embedded in the sealing grooves, an annular movable rim is clamped on the groove, a locking ring is embedded between the movable rim and the sealing rings, and the locking ring is clamped and locked on the sealing rings. The sealing ring is composed of two semicircular baffle rings, and the ends of the two semicircular baffle rings are fastened together through a bolt. According to the utility model, the pressure relief in the aircraft tire water pressure blasting process is prevented, the sealing effect in the test process is ensured to be optimal, the personal safety of testers is ensured, the water pressure performance test is normally completed, and accurate test data is provided for research and design personnel.

The present invention proposes an electric limit insulation type ultra-high temperature vacuum sintering furnace, comprising a furnace body and an electrode assembly arranged on the furnace body, the furnace body comprising a furnace drum, a heat shield, and a heater, the electrode assembly comprising an electrode, an insulating member, and a locking member, the electrode comprising an outer section, a sealing section, and an inner section connected in sequence from the outside to the inside, the locking member being connected to the end of the outer section, the inner section being engaged with the side wall of the furnace drum, the insulating member being engaged between the sealing section and the through hole of the furnace drum to insulate the electrode from the furnace drum, the insulating member being an insulator, the present invention sandwiches an insulating member between the sealing section of the electrode and the furnace drum, and after being sleeved on the outer wall of the sealing section, it is also in mechanical contact with the furnace drum, so that not only can the non-contact gap between the two be reduced to avoid residual air or impurities during vacuuming, but it can also serve as a mechanical contact between the two to enhance the stability of the connection between the two, and the through hole passing through the electrode can also be blocked to enhance the sealing between the electrode and the furnace drum to avoid pressure release.

The utility model provides an automatic sealing system of a gas film structure, which comprises a pressure space provided with a ventilation part communicated with the outside; the sealing element blocks the ventilation part, the sealing element is configured to be driven by the automatic traction device to open the ventilation part when the automatic traction device is powered on, and the sealing element is reset to block the ventilation part when the automatic traction device is powered off. According to the utility model, through the cooperation of the sealing element and the automatic traction device, the ventilation part is opened during power-on, the ventilation part can be automatically blocked during power-off, gas leakage is prevented, the stability of the system is improved, the operation energy consumption of the system can be reduced, and the energy utilization efficiency is improved.

This utility model provides a loss-in-weight scale with a leak-proof structure, including a box, support, clamping plate, dust cover, feeding assembly, first screening frame, second screening frame, loss-in-weight scale body, leak-proof assembly, feeding auger, drive motor, electric telescopic rod, rotating rod, and rotary motor. A clamping plate is provided at the feeding assembly position on the top of the box, and a dust cover is installed between the clamping plates. A support is also provided at the bottom of the box. Inside the box, a first screening frame is provided next to the feeding assembly, and multiple sets of electric telescopic rods are provided on both sides of the first screening frame. Each set of electric telescopic rods is equipped with a corresponding drive motor connected to the side of the box. A second screening frame is located directly below the first screening frame. This utility model has a reasonable structure, which can not only break up agglomerated powder particles but also remove impurities before weighing, greatly improving the accuracy of the loss-in-weight scale when weighing powder.

The utility model discloses a pipeline sealing device for gas engineering installation relates to pipeline sealing technical field, and the utility model discloses two mounting seats have the fixedly connected air inlet pipe between two mounting seats, and the lateral surface of air inlet pipe is provided with the air inlet hole of central symmetry distribution, and the fixedly connected rubber sleeve between two mounting seats and located the outside of air inlet hole, and the middle part fixedly connected with connecting pipe of one mounting seat, and the inside of connecting pipe communicates with air inlet pipe, and one side of mounting seat is fixedly connected with L type board, and the inboard of L type board is provided with movable plate, and one side fixedly connected with the inflator of movable plate, and one end of inflator is fixedly connected with connecting pipe, through extruding the air in the inflator and entering the inside of rubber sleeve, make rubber sleeve pressurization collision and pipeline inner wall closely fit, realize the sealing operation of pipeline, and through the control extrusion amount control rubber sleeve's expansion volume, realize the sealing operation of different pipe diameter pipeline.