53results about How to "Effective pressure relief" patented technology

The invention relates to flame-guard filters (F) consisting of a number of layer sequences (S1, S2, S3), wherein each of the layer sequences (S1, S2, S3) consists of filter layers (1, 2) arranged on top of each other. Each layer sequence (S1, S2, S3) consists of a first filter layer (1) and of a second filter layer (2), each made of a material arranged in a lattice formation and having openings (1.1, 2.1), each with an opening width (1.11, 2.11). The first filter layer (1) having a free side face (6.3) is a first end-filter layer (3) with a first end- filter opening width (3.11), and the second filter layer (2) having a free side face (6.4) is a second end-filter layer (4) with a second end-filter opening width (4.11). The second opening width (2.11) of a second filter layer (2) is smaller than the first opening width (1.11) of a first filter layer (1). The second filter layer (2) is opaque. The invention further relates to an arrangement (10) of at least two flame-guard filters (F1, F2), and also to a housing (9) which is encapsulated in a pressure-resistant manner and has at least one flame-guard filter (F, F1, F2).

This invention discloses a method for depressuring gas in ground drilled well and mining area. Before extracting coal a ground drilling well is drilled from ground to long distance, low breathing, high gas, projecting and soft covered seams, then extracting down seam. The gas from the up covered seam is exhausted from pipe.

The invention discloses a cable joint protection box. The cable joint protection box includes a shell, the shell comprises a protection cavity which is used for protecting a cable joint, and the protection cavity is provided with a penetrating opening which penetrates through the inside and the outside and is used for penetrating a cable; and the shell is provided with a heat dissipation hole penetrating into the protection cavity from the outer side. A heating expansion plug is fixed in the heat dissipation hole; and the heating expansion plug is provided with a ventilation hole penetrating through the interior and the exterior. The heating expansion plug can expand to seal the ventilation hole to seal the heat dissipation hole when the environment temperature reaches a first preset temperature value, and the heating expansion plug can be separated from the heat dissipation hole in the pressure difference direction when the internal pressure is increased until the internal and external pressure difference reaches a preset pressure difference. The heating expansion plug is closed when the internal temperature is too high, fire spreading is effectively prevented, the heating expansion plug can be bounced off under high pressure, and shell explosion is prevented through pressure relief, so the service life is effectively prolonged, and a better fireproof ventilation effect is achieved.

The invention discloses equipment and method for exploiting coalbed methane by kilometer drilling and subsection water explosion fracturing, and belongs to the field of engineering. The equipment comprises a kilometer drilling machine (1), wherein the kilometer drilling machine (1) excavates to form a vertical drill hole (2), a horizontal drill hole (3) intersected with the vertical drill hole (2), and a high drainage roadway (7) not intersected with the vertical drill hole (2), the horizontal drill hole (3) is located in a coal seam, a plurality of hydrothermal cracking cylinders (4) are arranged in the horizontal drill holes (3), and the high-pressure drainage roadway (7) is located in the center line of a blasting fissure zone above the coal seam. According to the equipment, the problems that existing coal mining equipment is not economical, not environmentally friendly, heavy and the like are solved, a novel water explosion fracturing technology is applied to coal mining operation,the fracturing range is effectively widened, pressure is more effectively relieved, coal bed gas desorption and gas production channel formation are more effectively promoted, meanwhile, water resources used by the water explosion fracturing technology are fewer, and the used ionic aqueous solution does not cause pollution and is simple and efficient to implement.

The invention relates to a safe induction valve. A valve core is arranged in a valve body; an annular sealing ring is arranged between the middle part of the valve core and an inner convex ring of the valve body; the annular sealing ring divides the valve body into an upper cavity and a lower cavity; one side of the middle part of the valve body is provided with a locking device; an electromagnetic valve is arranged in the valve body on the upper part of the valve core; and a pressure adjusting mechanism is also arranged in the valve body. The invention also relates to a safe buffer double-purpose valve applying the safe induction valve with the structure, wherein the center of an upper valve cap is provided with a damping hole, the lower end of the valve body is provided with a lower valve cap, and the center of the lower valve cap is provided with a damping hole. The combined application of the induction valve and the safe buffer double-purpose valve can replace an atmospheric valve, a safety valve and an electric unloading valve simultaneously. The induction valve and the safe buffer double-purpose valve have the advantages of simple structure, reliable running, convenient use, wide application and low price.

The invention discloses a fire extinguishment system and a fire extinguishment method in a fabrication bin of an electrochemical energy storage station based on gas extinguishment and mechanical ventilation and heat dissipation. The system comprises automatic gas extinguishment systems, a pressure relief system and a mechanical ventilation and heat dissipation system. The automatic gas extinguishment systems are correspondingly positioned at the two sides of two rows of battery cabinets in order to realize precise automatic fire extinguishment when thermal runaway occurs in a lithium ion battery; the pressure relief system is positioned above the short side of the prefabrication bin and can be automatically started for relieving the pressure when the pressure inside the prefabrication binis too high; the mechanical ventilation and heat dissipation system consists of an air charging fan, an exhausting fan and a water mist sprayer which are positioned at the two short sides of the prefabrication bins and are in diagonal distribution; and the mechanical ventilation and heat dissipation system is controlled by virtue of a smoke sensor and a pressure sensor so as to realize smoke discharging and temperature reduction functions. The fire extinguishment system and the fire extinguishment method disclosed by the invention can be used for quickly extinguishing a fire of a battery and discharging high-temperature smoke in time, thereby reducing the temperature of the battery and guaranteeing high-efficiency safe running of an energy storage system in the prefabrication bin.

A switch cabinet arcing pressure relief device comprises a breaker chamber pressure relief device, a bus chamber pressure relief device and a cable chamber pressure relief device. The pressure relief device comprises a pressure relief cover, a pressure relief frame, an arc-blocking honeycomb plate, a pressure relief screen plate, a hinge and a nylon bolt; one side of the pressure relief cover is connected to the pressure relief frame through a hinge, and the other side of the pressure relief cover is connected to the pressure relief frame through a nylon bolt. The pressure relief frame comprises a pressure relief frame front vertical plate, a pressure relief frame side vertical plate and a pressure relief frame reinforcing beam; the arc blocking honeycomb plate is arranged in the pressure relief frame and below the pressure relief screen plate; and the pressure relief screen plate is arranged in the pressure relief frame and above the arc-blocking honeycomb plate. When an internal fault arc is generated in the switch cabinet, the pressure release device can be reliably opened, the pressure release direction avoids an inspection tour channel and other equipment, the arcing device can be suitable for switch cabinets with different depths and widths, the number of fans can be increased or decreased to enhance ventilation, and the arcing device is safe and reliable and is applied to effective pressure release of the switch cabinet.

The invention relates to an inflaming retarding piece of an explosion-proof valve. The inflaming retarding piece comprises an annular piece body (1), an installation hole (2) is formed in the piece body (1), a plurality of bosses (7) are distributed on the front face of the piece body (1), are of a T structure and are evenly distributed in the circumference direction, and at least two circles of bosses (7) are arranged. Air flow channels with a plurality of bending parts are formed by gaps between the adjacent bosses (7). The bosses (7) on different circles on the piece body (1) are arranged in the radial direction in a parallel mode, and the bosses (7) are arranged in the same radial direction from the outer edge (6) to the inner edge (5) and are symmetrically crossed in the same circle. Compared with the prior art, the inflaming retarding piece is novel and simple in structure, the passing path of the air flow and the flame can be lengthened, the passing time of the air flow and the flame can be prolonged, the air flow can make full contact with all wall faces of the inflaming retarding piece to conduct heat exchanging, the temperature of the air flow is reduced, the flame is extinguished completely, and the problems that an inflaming retarding piece of an existing explosion-proof valve cannot extinguish the flame or release pressure quickly, effectively and reliably are solved.

The invention discloses an early warning device used for fire prevention and extinguishment in a building. The early warning device comprises a valve, a pressure relief port is formed in the left sideof the valve, fixed rods are arranged on the upper side and the lower side of the pressure relief port respectively, the right ends of the fixed rods are fixedly connected with the left side of the valve, a supporting plate is fixedly connected to the ends, away from the valve, of the fixed rods, two symmetrically-distributed telescopic rods are fixedly connected to the left side of the supporting plate, a pressure relief block is fixedly connected to the ends, away from the supporting plate, of the telescopic rods, a seal pad is arranged on the surface of the pressure relief block, the outerwalls of the telescopic rods are sleeved with first springs, the ends, away from the telescopic rods, of the first springs are fixedly connected with the left side of the pressure relief block, and first sliding blocks are fixedly connected to the upper side and the lower side of the pressure relief block respectively. Pressure relief can be performed inside the valve effectively, a pressure relief mechanism can be convenient to install and detach, and meanwhile the connecting position of a water pipe and the valve can be effectively prevented from loosening when water is introduced.

The invention provides an insensitive warhead pressure relief structure controlled by temperature and pressure, which can be applied to a high-strength and strongly restrained warhead for penetration and overload. The pressure relief structure of the present invention includes a body socket, which is connected to the tail of the warhead shell and forms an airtight integral structure with the warhead shell to ensure the integrity of the warhead structure during the penetration process; the warhead shell is provided with The pressure relief hole is provided with a charging hole on the body joint sleeve, and the pressure relief hole on the warhead shell is blocked by the pressure relief hole plugging screw composed of a nut cover with a stress groove and a fusible body in the cover, and The charging hole plugging cover with fusible core blocks the charging hole, and when the temperature and pressure reach the design value, the effective pressure relief of the high-strength and strongly restrained warhead that penetrates and overloads is realized.

The invention discloses a non-pressure grouting method based on mine construction. The method comprises the following steps of, S1, arranging a plurality of grouting holes along the cross section of amine well wall, and correspondingly mounting a gate valve on each grouting hole; S2, opening all gate valves; S3, grouting the grouting holes according to the horizontal height from bottom to top, and closing the gate valves on the corresponding grouting holes after grouting of each grouting hole is completed; and S4, after all the gate valves on the grouting holes are closed, completing the grouting. According to the method, in the grouting process, the corresponding gate valves on the grouting holes subjected to the grouting are all opened, pressure relief can be effectively carried out, and grouting in the non-pressure state can be realized in the whole grouting process, so that the pressure of the well wall is greatly reduced, and the quality of the well wall is ensured.

A microphone wind noise preventing apparatus (10) and an electronic device. The apparatus (10) comprises a first sound hole (11), a second sound hole (12), a first cavity (13), a second cavity (14), and a communication channel. The first sound hole (11) and the second sound hole (12) are communicated with each other by means of the first cavity (13). A first flow blocking part opposite to the first sound hole (11) and a second flow blocking part opposite to the second sound hole (12) are provided in the first cavity (13). The communication channel is used for communicating the first cavity (13) with the second cavity (14). The second cavity (14) is communicated with a microphone sound hole (17). An inlet (19) of the communication channel is located between the first flow blocking part and the second flow blocking part. A technical problem to be solved is high wind noise of the existing microphone body. One application of the microphone wind noise preventing apparatus is used for the electronic device.

An explosive-proof and intrinsically safe roadway lamp relates to the technical field of mining lamps. The technical problems to be solved are to reduce the cost and improve explosive-proof performance. The roadway lamp comprises a lamp shell, a lighting lamp installed in an intrinsic safety cavity of the lamp shell, and an explosive-proof cavity body fixed on the lamp shell, wherein the explosive-proof cavity body is a cylindrical cavity body with an open right end and a sealed left end, and a detachable plastic explosive-proof cover is fixed at the right end; the explosive-proof cavity body has three structural layers which are respectively a plastic outer layer, a metal middle layer and a plastic inner layer sequentially from outside to inside; adjacent layers are stuck mutually, and the right edge of each structural layer is retracted leftwards along the right edge of the external adjacent structural layer per se; the explosive-proof cover covers the opening at the right end of the explosive-proof cavity body; the explosive-proof cover is fixedly provided with a metal ring; the outer ring surface of the metal ring is tightly stuck with the inner wall surface of the metal middle layer of the explosive-proof cavity body. The roadway lamp provided in the invention can be used safely in an environment with flammable and explosive gases.

The invention discloses a coal seam horizontal well hydrodynamic jet reaming coal digging and bag supporting roadway-forming pressure relief method. The method comprises the following steps: hydrodynamic high-pressure jet reaming coal digging is conducted on a ground horizontal well to form a large-diameter drill hole, and part of energy in a coal seam is released through deformation and damage ofthe large-diameter drill hole to achieve an effective pressure relief effect, meanwhile the permeability and flow guiding capacity of coal mass around a shaft are also improved, compared with an existing pressure relief and outburst elimination mode that a large number of pressure relief drilled holes are constructed in a coal seam in an underground coal mine, the construction method is more efficient, economical and safer, setting and segmented supporting are achieved through a bag device, reamed pulverized coal is prevented from entering a reamed section at the front end, the pulverized coal can return to the ground advantageously, and therefore the coal-digging, pressure-relief and outburst-elimination effect is improved.

The invention discloses an auxiliary tool for ship hoisting. The auxiliary tool comprises a base plate, wherein the lower end of the base plate is fixedly provided with a supporting assembly, the lower end of the supporting assembly is welded with an upper protective plate, the lower end of the upper protective plate is connected with a lower protective plate through a pressure-bearing spring, thelower end of the lower protective plate is provided with a plurality of sets of universal wheels and hydraulic cylinders in sequence, an output end of each hydraulic cylinder is welded with a mounting seat, the lower end of each mounting seat is fixedly provided with a pressure-bearing steel plate, the two side walls of the upper end of the base plate are fixedly provided with guard rails respectively, and the outer walls of the guard rails are provided with LED lamps. The auxiliary tool for ship hoisting has the advantages that through the arrangement of the base plate, the supporting assembly, the upper protective plate, the pressure-bearing spring, the lower protective plate, a limiting pad, the LED lamps, the universal wheels, a baffle, a power box, a warning light, the hydraulic cylinders, a protective cylinder, the mounting seat and the pressure-bearing steel plate, the problems are solved that a current ship hoisting auxiliary tool is not flexible enough in use and low in functionality and an effective pressure-relief device is not provided.