53results about How to "To achieve the purpose of decompression" patented technology

The invention discloses a gate type explosion-proof valve. The gate type explosion-proof valve comprises a valve body, a gate frame is mounted on the valve body, a gate cover is mounted on the gate frame, sealing connecting strips are arranged between the gate cover and the gate frame, and an explosion-proof buffering device is mounted on the gate frame on the inner side of the gate cover. The gate type explosion-proof valve further comprises gate cover bearing lugs, gate cover bearing trays hinged with the gate cover bearing lugs are arranged on the gate cover, a gate cover follow-up device is mounted at one end, distant from the gate cover bearing trays, of the valve body, and a press sheet pressing and leaning on the gate cover follow-up device is arranged on the gate cover. When pressure increases, high-pressure gas generates large thrust force to the gate cover after being buffered by the explosion-proof buffering device, the gate cover rotates by a certain angle around hinging points between the gate cover bearing trays and the gate cover bearing lugs, a gap is generated between the gate cover and the gate frame, the high-pressure gas is exhausted from the gap, and accordingly the purpose for releasing pressure is achieved. The gate type explosion-proof valve is strong in adaptability to various inflammable dust, quick in pressure releasing, low in systematic cost and investment running cost, and is an essential unit in an anti-explosion dust remover.

This application relates to the field of urban drainage, in particular to a two-way water stop valve, which is characterized in that it includes a gate frame, a gate is slidably connected to the gate frame, a screw lift is provided on the gate frame, and the wire The end of the screw rod of the rod lifter is connected with the gate. Both sides of the gate are connected with water-stop rubber strips. pressure relief structure. The application has the advantage of improving the water-stopping effect of the water-stop valve.

The invention provides a filling device for coal mining, comprising a filling air bag and an inflation nozzle installed on one side of the filling air bag. A rubber sleeve and a second rubber sleeve, the outer side of the second rubber sleeve is provided with an external thread cylinder, a cylindrical body is sleeved on the external thread cylinder, and a fixing ring is fixed on the side of the cylinder body away from the internal thread , the side of the fixing ring facing away from the inner thread is provided with a thin iron sheet, and the side of the fixing ring facing the thin iron sheet is installed with a magnet block. Compared with the prior art, the present invention has the following beneficial effects: it has the following advantages It can prevent the filling airbag from being squeezed and damaged, and also achieve the purpose of stably stacking the filling airbag.

The invention discloses a water overflow preventing teapot lid with a pressure relief cylinders, which relates to the teapot lid. According to the teapot lid, an annular bulge (7) is arranged on the outer edge of the teapot lid; a necking annular cylinder (8) is arranged at the lower part of the annular bulge; upper ends of at least three elastic clamping sheets (9) are fixedly connected with the lower end or inner face of the lower part of the annular cylinder; at least two openings (6) are arranged around a handle of the teapot; outer walls of at least two cylinder bodies (4) of the pressure relief cylinders are in clearance fit with inner walls of the openings; a plurality of pressure relief holes (3) are formed in the cylinder bodies; anti-drop outwards turned plates (5) are arranged at the lower ends of the cylinder bodies; plate bodies (1) are arranged at the upper ends of the cylinder bodies; diameters of the plate bodies are larger than that of the openings; and the pressure relief holes in the cylinder bodies form pressure relief exhaust passages. According to the teapot lid, the openings formed in the teapot lip are closed by the arranged pressure relief cylinders to guarantee the temperature of the water can not be lowed; the pressure relief cylinders are lifted by water vapour to form the exhaust passages, so as to achieve the purpose of large displacement pressure relief, and to effectively reduce water overflow phenomenons.

The invention discloses a method for improving the extraction rate of a high residual gas content coal seam of an underground coal mine. The method comprises the following steps that a mounting hole is drilled; a hole opening sealing connection pipe fitting is mounted and fixed; construction of a gas extraction drill hole is conducted; CaC2 is stored in the gas extraction drill hole; a mine waterpressing pipeline is connected with the hole opening sealing connection pipe fitting, water is jetted into the gas extraction drill hole, and the hole opening sealing connection pipe fitting is closedafter jet is finished; CaC2 in the gas extraction drill hole and the water are subjected to reaction to generate Ca(OH)2 and C2H2, a large amount of heat is generated at the same time, under the thermal effect, coal seam gas is accelerated to conduct desorbing; and the hole opening sealing connection pipe fitting is connected with an extraction pipe, and gas extraction is conducted through pipe-linking. According to the method for improving the extraction rate of the high residual gas content coal seam of the underground coal mine, the temperature in the drill hole is further improved to promote gas desorption of the coal seam, and the gas extraction rate is improved accordingly; and interval hole drilling implement or concentrated hole drilling implement can be adopted according to occurrence characteristics of the coal seam and the drill hole arranging form. The method for improving the extraction rate of the high residual gas content coal seam of the underground coal mine has the characteristics of safety, high efficiency, reliability and small engineering quantity, and can be widely used in the field of gas extraction of the underground coal mine.

The invention relates to the technical field of household electrical appliances for food processing and parts thereof, in particular to a pressure control valve applied to a negative pressure food cooking machine. The cooking machine includes a machine base and a cooking cup. The cooking cup is provided with a handle, and the lid is covered on the cooking cup. A motor and a vacuum pump are installed in the machine base. There is a suction nozzle on the wall of the cooking cup, and the check valve is connected to the suction nozzle. The upper part is connected with the vacuum pump in the frame through the exhaust pipe. The check valve includes a hard shell, a soft shell and a valve core. The soft shell is set on the hard shell to form a closed cavity. The valve core is placed in the cavity and the entrance of the soft shell is closed by its own weight to form a check valve. The pressure part moves the spool away from the inlet of the soft case under the action of external force to open the check valve. The invention has the advantages of simple structure, reliability and long service life.

A method for pressure relief of residual coal pillars at a short distance, comprising the steps of: making a standard test piece in a laboratory after sampling, and determining the width X of the crushed zone formed by the impact of primary mining in the coal pillars 1 and the width of the broken zone formed by the impact of secondary mining on the coal pillar X 2 : At the site, holes are drilled upwards on the side of the roadway near the coal pillar in the underlying coal seam, and explosives are filled in the borehole for blasting. Further damage under load will cause the entire coal pillar to lose its stress transmission capacity, thereby achieving pressure relief and ensuring coal mining face mining under low stress conditions. The invention has a scientific principle, a reasonable design, adopts an operation mode combining theory with practice, and has the advantages of strong pertinence, convenient operation, high efficiency, strong safety and reliability, and good pressure relief effect.

The present invention discloses a pressure kettle. The pressure kettle comprises a kettle body, a kettle cover, a first movable component, a second movable component and a switch; an accommodating cavity is defined in the kettle body; a water outlet communicated with the accommodating cavity is formed in the kettle cover; a water outgoing valve for opening and close the water outlet is arranged in the kettle cover; an air exhausting channel communicated with the accommodating cavity is arranged on the kettle cover; the first movable component is arranged on the kettle cover so as to open and close the air exhausting channel; the second movable component is arranged on the kettle cover; the first movable component cooperates with the second movable component and the water outgoing valve, so that after the first movable component opens the air exhausting channel, the second movable component opens the water outgoing valve; and the switch is movably arranged on the kettle body or the kettle cover so as to move drive the first movable component to move. With the pressure kettle provided by the embodiments of the invention adopted, pressure relief before water discharge can be realized, the safety of the water discharge of the pressure kettle can be ensured. The pressure kettle has the advantages of simple structure, compactness, simple operation, safe and reliable water discharge.