30results about How to "Not easy to flow back" patented technology

The invention relates to a manual pressure relief type check valve. A first end opening and a second end opening which communicate with each other are formed in a valve body. A channel between the first end opening and the second end opening is a pressurization channel. A pressurization control device is installed at the first end opening. The side face of the valve body is provided with a pressure relief opening communicating with the pressurization channel. A pressure relief control device is installed at the pressure relief opening. The pressurization control device comprises a closed element and a sealing element which is fixed to the end face of the first end opening and is provided with a pressurization through hole capable of communicating with the pressurization channel. The closed element is movably installed in the pressurization channel. The diameter length of the closed element is larger than the hole diameter of the pressurization through hole and is smaller than the diameter length of the position, where the closed element is located, of the pressurization channel. The manual pressure relief type check valve has higher reliability, the maximum value of air pressure in a container can be increased, the requirements for materials and a process are also lowered relatively, and cost can be reduced.

The invention provides a water drainage structure for an air filter. An air filter water drainage seat is arranged on an air filter body. The air filter water drainage seat and an air filter water drainage piece are combined. The air filter water drainage seat comprises a water drainage hole and at least two retaining walls, wherein the water drainage hole penetrates the air filter body and is surrounded by all the retaining walls at intervals. The air filter water drainage piece comprises a combination disc, an annular groove, a protruding column, a water drainage space and a water drainage port. The combination disc comprises a combination face combined with one retaining wall. The annular groove is formed in the combination disc. The protruding column is arranged in the annular groove. A tortuous water drainage channel is formed between the protruding column and the retaining wall close to the water drainage hole. The water drainage space is formed between the annular groove and the protruding column. The water drainage port penetrates the annular groove and is communicated with the water drainage space.

The invention belongs to the technical field of natural gas or coal gas production, and relates to a liquid bubble atomization method for gas well stimulation. Multiple liquid accumulation atomization devices are installed in the wellbore to realize the joint use of multiple liquid accumulation atomization devices, and multiple liquid accumulation atomization devices are used in combination to form a functional group, and the bottom of the well is gradually foamed or foamed. Atomization, so as to discharge the bottom-hole fluid out of the wellbore; use the airflow power relay to move the liquid up step by step, and limit the backflow of the liquid through the edge of the atomization device to improve the efficiency of fluid removal. The device body includes an oil pipe and an orifice plate arranged inside the oil pipe. The orifice plate is made of metal or non-metal material, and the orifice plate is provided with circular or polygonal through holes. It can not only effectively overcome the backflow of effusion, but also reduce the amount of chemical agents, save costs, and improve the effective time of measures, and can be widely used in the mining process of natural gas and coalbed methane.

The invention relates to a drainage and seepage type felting composite structure. The seepage type felting composite structure comprises a beam-slab felting structure, a permeable PC substrate, a U-shaped ecological water draining and collecting ditch, and a seepage and drainage pipe, wherein the beam-slab felting structure is assembled into a side pavement or a motorized vehicle lane; the permeable PC substrate and the beam-slab felting structure are combined into a motor vehicle lane or a square and have a load effect. The U-shaped ecological water draining and collecting ditch is installed at one side or two sides of the motor vehicle lane or the square; the drainage and seepage pipe comprises a transverse PC pipe and a vertical PC pipe; the transverse PC pipe is communicated with the U-shaped ecological water draining and collecting ditch; and the vertical PC pipe is communicated with the transverse PC pipe. The drainage and seepage type felting composite structure is permeable and breathable, can carry out earth surface heat exchange easily, can recycle rainwater effectively, reduces an urban heat island effect, is suitable for eco-environment protection, is simple in structure, and is simple to construct.

The invention discloses a printing and dyeing cloth dehydrator. The printing and dyeing cloth dehydrator comprises a base, a groove is formed in the top face of the base, a dehydrating barrel is arranged on the groove, multiple water outlets are formed in the dehydrating barrel, and multiple annular draining grooves are formed in the inner wall of the bottom of the groove; a drain opening is formed in the inner wall of the bottom of each annular draining groove, a pair of inserting grooves is oppositely formed in the side wall opposite to the drain openings, inserting blocks are fixedly connected to one end of a filtering net, inserting sleeves are arranged at the other end of the filtering net, and the inserting blocks and the inserting sleeves are inserted into the corresponding inserting grooves respectively; a pair of connecting rods is formed in the top face and the bottom face of the filtering net, guide grooves are formed in the connecting rods, the upper ends and the lower ends of the inserting sleeves are sleeved with the corresponding guide grooves of the connecting rods, one end of the filtering net is sleeved with the inserting sleeves, and compression springs are fixedly connected between the end of the filtering net and the inner walls of the inserting sleeves. The printing and dyeing cloth dehydrator has the advantages that water is not accumulated in the groove of the base easily, dehydrating efficiency is improved, and water obtained through dehydration can be filtered.

The invention provides three-dimensional interconnected breathable three-layer mesh cloth. The three-dimensional interconnected breathable three-layer mesh cloth comprises a surface layer, a bottom layer and a middle layer used for connecting the surface layer and the bottom layer, wherein the surface layer is provided with a plurality of meshes, a blade is arranged at each mesh, and one end of each blade is woven and connected to the lateral wall of the corresponding mesh. The invention further provides a manufacturing method of the three-dimensional interconnected breathable three-layer mesh cloth. The manufacturing method includes: threading, weaving, dyeing and finishing, and the like. The three-dimensional interconnected breathable three-layer mesh cloth has the advantages that due to the fact that the blade is arranged at each mesh and one end of each blade is woven and connected to the lateral wall of the corresponding mesh, the blades swing in a reciprocating manner at the meshes along with air flow, air flowing is promoted, and a relatively good air exchanging effect is achieved; the blades also change the air flowing direction, so that sufficient heat exchanging between cold air and hot air can be achieved, and hot air backflow is difficult.

The invention discloses a window-cleaning machine which comprises a shell, wherein a handle is arranged on the rear part of the shell; a cleaning head is mounted above the shell; a water suction port of the cleaning head is communicated with a water-air inlet of the shell; a sewage collecting box is mounted on the lower part of the shell; a water channel is arranged between the water-air inlet and the sewage collecting box; a water-air separating cavity is arranged between the water channel and the water-air inlet; an air absorbing device is arranged in the shell; an air absorbing port of the air absorbing device is arranged on a lateral wall of the water-air separating cavity; a front baffle is arranged in the water-air separating cavity; a water-air separating plate is arranged between the front baffle and the air absorbing port; a water-stopping plate is arranged in the sewage collecting box; the front end of the water-stopping plate is jointed with an inside wall at the front end of the sewage collecting box; the left and right sides of the water-stopping plate are jointed with left and right inside walls of the sewage collecting box; a clearance exists between the rear end of the water-stopping plate and the inner bottom surface of the sewage collecting box; the front end of the water-stopping plate is not lower than the rear end. The window-cleaning machine can be used for efficiently separating water from air, can prevent water from being absorbed into the air absorbing port and also can prevent water from flowing backwards out of the sewage collecting box.

The invention discloses a cloth printing and dyeing dehydrator device which comprises a base. A groove is formed in the top face of the base, a dehydration barrel is arranged on the groove, a plurality of water outlets are formed in the dehydration barrel, and a plurality of annular water draining grooves are formed in the inner wall of the bottom of the groove; drainage openings are formed in theinner walls of the bottoms of the annular water draining grooves, a pair of oppositely-arranged plugging grooves are formed in the opposite side walls of each draining opening, a plugging block is fixedly connected to one end of a filter net, a plugging sleeve is arranged at the other end of the filter net, the plugging block and the plugging sleeve are plugged into the corresponding plugging grooves, the top face and the bottom face of the filter net are provided with a pair of connecting rods, guiding grooves are formed in the connecting rods, the upper end and the lower end of the pluggingsleeve is plugged into the guiding grooves in the corresponding connecting rods, one end of the filter net is plugged into the plugging sleeve, and a compression spring is fixedly connected between the end of the filter net and the inner wall of the plugging sleeve. The device has the advantages that water is not likely to be accumulated inside the groove of the base, the dehydration efficiency is improved, and dehydrated liquid can be filtered.

The invention relates to a preparation method of a hip-protecting diaper. The diaper body includes two hip-protecting parts, a liquid-permeable surface layer, a composite absorbent core layer and a liquid-impermeable bottom layer stacked from inside to outside. Superimposed upper air-permeable layer, buttock protection layer and lower air-permeable layer, between the upper air-permeable layer and the lower air-permeable layer, the first rubber is arranged on both sides of the hip-protection layer; the composite absorbent core layer includes the upper layer absorbent core and the lower layer which are successively stacked up and down In the absorbent core, the upper layer absorbent core is longitudinally provided with first flow guide grooves, and the lower layer absorbent core is longitudinally provided with second flow guide grooves. The invention relates to the field of disposable sanitary products. The buttock protector has a good effect of protecting the buttocks. Through the first diversion groove and the second diversion groove, the ability of diversion and absorption of the composite absorbent core layer is improved, and the absorbent core of diapers is solved. The diversion effect is poor, the absorption speed is slow, the buttocks are easy to be stained with liquid, and it is easy to cause technical problems of the baby's red buttocks.