13results about How to "High work pressure" patented technology

The invention discloses a processing method of a spinneret plate, which comprises the following steps: acquiring a plate material, and pretreating the plate material to obtain a blank of the spinneret plate; the blank is installed on an automatic punching machine tool, punching is conducted on the same position of the blank for at least three times, modification treatment is conducted after punching of the blank is completed every time, and the spinneret plate is obtained. The invention further discloses the lyocell spinneret plate. According to the spinneret plate, the same position in the spinneret plate blank is subjected to multiple times of punching and other operations, spinneret orifices formed through multiple times of punching are low in roughness and higher in size precision, meanwhile, the strength of materials in the orifices is enhanced, and the problems that in spinning production, yarn breaking and doubling are likely to happen, adhesion is likely to happen, and the plate replacement cleaning difficulty is large can be solved.

The present application relates to the fields of materials science and metal processing, and discloses a 12Cr2Mo1V steel forging for a pressure vessel and a heat treatment process thereof, wherein the surface of the steel forging has a composite cladding layer, and the composite cladding layer is composed of tungsten carbide, chromium carbide and 5%-10% titanium or nickel. The heat treatment process comprises the following steps: after the composite cladding layer is prepared, a preliminary heat treatment is performed, the tempering temperature is 250-350°C, and the duration is 2-3 hours; normalizing or quenching treatment is performed, the normalizing temperature is 900-950°C, and the quenching temperature is 930-980°C; after normalizing or quenching, tempering treatment is performed, the tempering temperature is 500-650°C, and tempering is performed at least twice. The present invention provides an efficient and reliable processing method, which greatly improves the comprehensive performance of 12Cr2Mo1V steel forgings, and is particularly suitable for industrial applications requiring extremely high durability and reliability.

According to the rotary thrust plate system and the hydraulic axial variable plunger pump, a rotary thrust plate with rollers is arranged between a sliding shoe and a variable swash plate, and sliding friction between the sliding shoe and the variable swash plate is converted into rolling friction. The sliding shoe is fixed on the thrust plate to eliminate relative motion; and the conical self-aligning raceway on the swash plate is matched with the roller. An isolation type lubrication packaging structure is adopted, the problem that a sliding shoe is prone to abrasion and ablation is fundamentally solved, the working service life of the pump is prolonged, the reliability of the pump is improved, and the maintenance cost is reduced.

The invention discloses a vehicle-mounted lightweight fully wound fiber reinforced aluminum liner high-pressure hydrogen storage cylinder, the hydrogen storage cylinder comprising a variable thickness seamless aluminum alloy liner (100), a reinforcing sleeve (200) installed on a shoulder bottle mouth (104) of the variable thickness seamless aluminum alloy liner (100), a carbon fiber winding layer (300) installed on the outer surface of the variable thickness seamless aluminum alloy liner (100) and the outer surface of the reinforcing sleeve (200), a glass fiber impact-resistant layer (400) installed on the outer surface of the carbon fiber winding layer (300) and the outer surface of the reinforcing sleeve (200), and a sleeve straight thread (201) on the inner surface of the reinforcing sleeve (200) made of aluminum alloy and a bottle mouth straight thread (105) on the outer surface of the shoulder bottle mouth (104) are threadedly connected. The invention has a compact structure, light weight, large bulk density ratio, high working pressure, and a large number of fatigue cycles, and can improve the bottle mouth structure and safety performance, thereby ensuring the operation quality.

The application discloses a compressed natural gas bottle valve for vehicle, which comprises a valve body, a safety device and an opening and closing device. The valve body comprises an air inlet end and an air outlet, the air inlet end is suitable for being connected to a gas bottle, the air inlet end is provided with a first air inlet channel and a second air inlet channel, the second air inlet channel is communicated with the air outlet; the safety device is sealedly connected to the outlet end of the first air inlet channel, when the pressure in the gas bottle is higher than a first set value or the ambient temperature is higher than a second set value, the safety device opens the outlet end of the first air inlet channel to release pressure; the opening and closing device comprises a flow limiting valve, a sealing mechanism and an adjusting mechanism, the flow limiting valve is arranged at the second air inlet channel, the flow limiting valve limits the gas flow within a third set value, and the sealing mechanism comprises a valve rod and a sealing element arranged on the valve rod. The application can improve the endurance mileage of the natural gas vehicle, and through the cooperation of the adjusting mechanism and the flow limiting valve, a lower gas flow can be limited without replacing the original flow limiting valve, and the gas flow can be linearly adjusted, thereby increasing the practicability.

The present invention discloses a compact microchannel LNG heat exchanger and a preparation method thereof. The heat exchanger includes a heat exchanger body, and a plurality of cold fluid channels and hot fluid channels are arranged alternately and at intervals in the vertical direction. The two ends of the cold fluid channel are respectively connected to the cold fluid inlet and the cold fluid outlet, and the two ends of the hot fluid channel are respectively connected to the hot fluid inlet and the hot fluid outlet. The cold fluid channel includes a first diverter channel, a cold side heat exchange channel and a first confluence channel. The hot fluid channel includes a second diverter channel, a heat measurement heat exchange channel and a second confluence channel. The present invention adopts a countercurrent arrangement, and a large temperature difference stress is not generated at both ends of the heat exchanger. Diverter and confluence channel sections are respectively arranged after the fluid inlet and before the fluid outlet. The fluid flows through the diverter channel, and the diverter channel makes the flow distribution more uniform, so that the medium temperature is evenly distributed. The preparation method adopts additive manufacturing technology for one-piece molding, and the material utilization rate is high, which ensures the stability and efficiency of the heat exchanger operation.

The utility model provides a novel valve body assembly and a plunger pump for oil and gas field fracturing construction, relates to the technical field of oil and gas field hydraulic fracturing equipment, and solves the technical problems that a valve body assembly is short in service life and needs to be replaced frequently. The novel valve body assembly comprises a valve body and a rubber piece, the valve body comprises a matching part used for making contact with a valve seat, a clamping groove is formed in the matching part, and the rubber piece is arranged in the clamping groove in a sleeved mode; the numerical range of the contact area of the rubber piece and the valve seat to the contact area of the matching part and the valve seat is 1 / 3-1; or the numerical value range of the contact area of the matching part and the valve seat to the contact area of the rubber piece and the valve seat is 1 / 3-1; by changing the proportion of the contact surfaces of the valve body, the valve rubber and the valve seat in the valve body assembly, high working pressure and collision frequency can be adapted, and meanwhile, the service life of the valve body assembly can be prolonged. The novel valve body assembly is suitable for plunger pumps for fracturing construction of oil and gas fields.

The invention relates to the technical field of ground phosphate rock, and particularly discloses a method for producing ground phosphate rock pellets by using yellow phosphate ore beneficiation pulp. Comprising six steps of ore pulp thickening, filter pressing, mineral powder drying, proportioning and mixing, ball pressing and ground phosphate rock pellet drying, and a natural plant-based polymeric flocculant added in the earlier stage is matched with high temperature in the mineral powder drying process, and an organic binder with hydroxyl and phosphoric acid cooperate with each other; the technical problems that the grade of the ground phosphate rock pellets is reduced, the quality and yield of produced yellow phosphorus are reduced, the production cost is increased and the production cost of the yellow phosphorus is increased due to the fact that a large amount of adhesives are input in the production of the ground phosphate rock pellets in the prior art due to the strength requirement are solved.

The invention discloses an integrated reactor for treating rural non-point source pollution and a method for treating rural non-point source pollution by using the reactor. The reactor increases the temperature, reduces the pH and provides N and S elements for treating rural non-point source polluted water by adding straw in a combustion chamber for combustion, greatly promotes photocatalytic decomposition and biodegradation, and greatly accelerates the pollutant treatment speed; and the combustion exhaust gas has no adverse effect on the environment after being purified and absorbed twice; the invention is simple and flexible, can treat rural non-point source pollution caused by different reasons, and can treat decentralized rural non-point source pollution in an integrated manner.

The utility model discloses double-component quick-setting waterproof coating spraying equipment which comprises two storage boxes and two stirring tanks which are arranged on a loading system, the two storage boxes are respectively provided with a feeding port, a single-arm three-blade stirrer is arranged in each stirring tank, the two stirring tanks are connected to a spraying pump through discharging pipes respectively, and the spraying pumps are connected with the loading system. The material storage box and the stirring tank are communicated through respective material conveying pipes, the two material conveying pipes are respectively provided with a metering pump, the top of the stirring tank is respectively provided with an auxiliary agent tank, the stirring tank is communicated with the corresponding auxiliary agent tank through a suction pump, the spraying system further comprises an air compression device, and the air compression device provides air pressure for the stirring tank. And the control system controls the opening and closing of all electrical appliances of the device. According to the utility model, 3-5 tons of materials can be stored at one time, so that the consistency of the materials is ensured; the construction operation flow is large, and the operation efficiency can be improved to 2000 m < 2 > / day; it is guaranteed that materials are transported at any time, and large working pressure and spraying flow are achieved.

The invention belongs to the technical field of pipes, particularly relates to an embedded type internal anti-corrosion spiral ribbed steel pipe, and aims to solve the problems that an existing steel-plastic composite pipeline is prone to layering and falling off, poor in anti-corrosion performance and poor in structural strength, and adopts a layered composite structure of a carbon steel metal structural layer, a bonding layer and a polyolefin anti-corrosion layer. After the carbon steel metal structure layer is subjected to surface optimization treatment, reinforcing ribs are spirally wound on the outer wall, an embedded spiral structure rib belt is arranged on the inner wall, an elastic additive buffer layer is added to a bonding layer, a polyolefin anti-corrosion layer is made of a modified polyolefin material, meanwhile, multiple reliable connection modes are matched, and machining parameters are accurately controlled through a specific production technology. The effects of strong combination, low stress and stripping resistance of a steel-plastic interface can be achieved, the structural strength, corrosion resistance durability and installation adaptability of the pipeline are improved, and the steel-plastic composite pipe is suitable for various scenes such as high-pressure conveying and complex working conditions.

The utility model relates to the technical field of side ditch construction, and discloses road side ditch construction equipment which comprises a cart, first lifting motors are symmetrically and fixedly connected to the top of the cart, a reclamation groove is formed in the top of the cart in a penetrating mode, and second lifting motors are further symmetrically and fixedly connected to the top of the cart. The side wall face of the first lifting motor is fixedly connected with a rotating motor, a reclamation structure is arranged at the top of the cart and comprises a side rod, a digging rod and a collecting pipe, the side rod is movably connected to the side wall face of the first lifting motor, the digging rod is fixedly connected to the top of the side rod, the collecting pipe is movably connected to the top of the cart, and the reclamation structure can dig a side ditch. By arranging the reclamation structure, scattering of soil can be reduced during grooving, and the reclamation structure excavates the soil, shovels up the excavated soil, stores the excavated soil and compacts the excavated ditches, so that grooving is achieved.

The invention provides a reciprocating pump for a cryogenic medium, comprising: an outer container comprising an outer cylinder and an outer convex seal head arranged at one end of the outer cylinder, the outer convex seal head being provided with an outer mounting port; the inner container is arranged in the outer container, the inner container comprises an inner cylinder and an inner convex seal head arranged at one end of the inner cylinder, and an inner mounting opening is formed in the inner convex seal head; the sleeve assembly comprises an inner sleeve and an outer sleeve arranged on the outer side of the inner sleeve in a sleeving mode, the first end of the inner sleeve is connected with the inner installation opening, the first end of the outer sleeve is connected with the outer installation opening, and an inner and outer sleeve connecting piece is connected between the second end of the inner sleeve and the second end of the outer sleeve in a sealed mode. Communicated vacuum heat insulation cavities are formed between the inner container and the outer container and between the inner sleeve and the outer sleeve; one end of the fluid end structure extends into the inner container through the inner mounting opening, and the other end of the fluid end structure is detachably connected with the inner and outer sleeve connecting piece. According to the invention, the fluid end structure can be repeatedly disassembled without damaging the vacuum structure, and the working pressure can be improved.