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CN-121988743-A - Fire-retardant explosion-proof safety device of broken stove of neodymium iron boron hydrogen

CN121988743ACN 121988743 ACN121988743 ACN 121988743ACN-121988743-A

Abstract

The invention discloses a flame-retardant and explosion-proof safety device of a neodymium iron boron hydrogen breaking furnace, which relates to the technical field of flame-retardant and explosion-proof safety devices and comprises a primary static seal pressure relief assembly, a diversion buffer pipeline and a secondary liquid seal trapping tank, wherein the primary static seal pressure relief assembly, the diversion buffer pipeline and the secondary liquid seal trapping tank are sequentially communicated, the tail end of the diversion buffer pipeline extends to form an immersed tube, a sleeve with a blind plate and a radial exhaust hole is sleeved at the bottom of the immersed tube, a diversion head is arranged in the sleeve, and a rebound assembly for applying biasing elastic force to the sleeve is arranged in the secondary liquid seal trapping tank. The explosion piece is opened under the overpressure working condition, the high-pressure air flow impacts the guide head to force the sleeve to overcome the bias elastic force to generate downward displacement, the fluid impact kinetic energy is converted into mechanical potential energy, the physical buffering effect of rigid impact of the resolving system is generated, meanwhile, the air flow is dispersed and discharged into the trapping liquid through the radial exhaust holes, the microcosmic contact area of the air and the liquid is increased, the effects of rapid cooling and physical isolation and flame retardance are generated, and the purpose of improving the safety of special metallurgical working conditions is achieved.

Inventors

  • HUANG YAJIE
  • GUO QIXUE
  • HE XUEBING
  • Miao Linmao
  • LIU XU
  • JIA JIANSHE
  • DAI HUALEI

Assignees

  • 上海山美环保装备股份有限公司
  • 商丘星林电子产业有限公司

Dates

Publication Date
20260508
Application Date
20260409

Claims (9)

  1. 1. The utility model provides a fire-retardant explosion-proof safety device of broken stove of neodymium iron boron hydrogen for connect broken stove body (1) of hydrogen, including one-level static seal pressure release subassembly (2), one-level static seal pressure release subassembly (2) including sealing connection in broken stove body (1) exhaust side of hydrogen, and set for burst disk (5) that open under the superpressure operating mode, its characterized in that still includes: the diversion buffer pipeline (3) and the second-level liquid seal trapping tank (4) are sequentially communicated with the downstream of the first-level static seal pressure relief assembly (2); The inside of the secondary liquid seal trapping tank (4) is filled with trapping liquid (9), and the tail end of the diversion buffer pipeline (3) extends to be an immersed tube (10) immersed below the liquid level of the trapping liquid (9); a one-way valve assembly (6) is arranged in the diversion buffer pipeline (3) in series; The bottom of the immersed tube (10) is integrally formed with a step shaft (11), a sleeve (12) is sleeved outside the step shaft (11), a blind plate (13) is arranged at the bottom of the sleeve (12), and a plurality of radial exhaust holes (14) are formed in the side wall of the sleeve, which is close to the blind plate (13); The device is characterized in that a guide head (15) is arranged in the center of the inside of the sleeve (12), the upper part of the guide head (15) is conical, a rebound assembly is arranged in the secondary liquid seal collecting tank (4) and is used for applying an axially upward biasing elastic force to the sleeve (12), and the sleeve (12) is used for being subjected to downward displacement by airflow impact against the biasing elastic force under a pressure relief working condition.
  2. 2. The fire-retardant explosion-proof safety device of the NdFeB hydrogen furnace is characterized in that a shaft sleeve (21) is rotatably connected to the outside of the sleeve (12), and a plurality of spiral blades (22) are uniformly fixed on the outer wall of the shaft sleeve (21) along the circumferential direction.
  3. 3. The NdFeB hydrogen furnace breaking flame-retardant and explosion-proof safety device is characterized in that a through hole (16) is formed in the center of a blind plate (13), a mounting frame (24) is fixedly connected to the inside of the through hole (16), the rebound assembly comprises a supporting frame (25) fixedly connected to the bottom of a secondary liquid seal collecting tank (4), a supporting column (26) is vertically and fixedly connected to the top of the supporting frame (25), the top of the supporting column (26) penetrates through the mounting frame (24) and extends into the sleeve (12) and is fixedly connected with a guide head (15), a supporting spring (27) is sleeved outside the supporting column (26), and two ends of the supporting spring (27) are respectively abutted to the supporting frame (25) and the mounting frame (24).
  4. 4. The fire-retardant explosion-proof safety device of the neodymium iron boron hydrogen furnace is characterized in that an end cover (18) is fixedly connected to the top end of the sleeve (12), the end cover (18), the sleeve (12), the step shaft (11) and the immersed tube (10) form a sealed annular cavity (19), and a plurality of drain holes (20) are formed in the top end of the end cover (18).
  5. 5. The fire-retardant explosion-proof safety device of the neodymium iron boron hydrogen breaking furnace is characterized in that a reverse suction prevention volume cavity (7) is arranged on a diversion buffer pipeline (3) in series, the effective internal volume of the reverse suction prevention volume cavity (7) is larger than the volume of a part, immersed by a trapping liquid (9), of the immersed tube (10), a liquid blocking weir (8) is arranged on the inner wall circumference of the reverse suction prevention volume cavity (7) in a protruding mode, and the cross section of the liquid blocking weir (8) is in an inward-contracted water blocking chamfer shape.
  6. 6. The fire-retardant explosion-proof safety device of the neodymium iron boron hydrogen breaking furnace is characterized in that a separation assembly is arranged inside the secondary liquid seal trapping tank (4) and above the liquid level of the trapping liquid (9), the separation assembly comprises a plurality of layers of umbrella-shaped splash-proof baffles (23), the splash-proof baffles (23) are stacked and staggered in the vertical direction, and the bottom surface appearance of the splash-proof baffles (23) is an inverted liquid accumulation-proof inclined surface with the edge inclined downwards.
  7. 7. The fire-retardant explosion-proof safety device of the NdFeB hydrogen breaking furnace is characterized in that a wire mesh foam remover (28) is horizontally fixed below a top exhaust port of the secondary liquid seal trapping tank (4), a bottom shell of the secondary liquid seal trapping tank (4) is contracted downwards to form a conical slag discharging cavity (29), and the lowest point of the conical slag discharging cavity (29) is communicated with a slag discharging valve (30).
  8. 8. The NdFeB hydrogen furnace breaking flame-retardant and explosion-proof safety device according to claim 3, wherein the lower part of the inner side wall of the sleeve (12) is provided with a diversion cambered surface (17).
  9. 9. The NdFeB hydrogen furnace-breaking flame-retardant explosion-proof safety device according to claim 1, wherein the trapping liquid (9) consists of an inert liquid without water.

Description

Fire-retardant explosion-proof safety device of broken stove of neodymium iron boron hydrogen Technical Field The invention relates to the technical field of flame-retardant and explosion-proof safety devices, in particular to a flame-retardant and explosion-proof safety device of a neodymium iron boron hydrogen cracking furnace. Background The technology utilizes the physical characteristic of volume expansion of rare earth neodymium-rich phase after hydrogen absorption to crush alloy cast sheets, thereby producing a large amount of high-activity neodymium-iron-boron micro powder, the hydrogen crushing furnace is usually under the special atmosphere working condition of high vacuum or filling hydrogen during operation and is limited by equipment seal aging or misoperation, and once air uncontrollably leaks into a high-temperature area in the furnace, overpressure deflagration accidents are extremely easy to be caused, so that the flame-retardant explosion-proof safety device is an indispensable component part of the special metallurgical equipment. In the treatment mode of the prior art, aiming at explosion prevention and pressure relief of the pressure equipment, two conventional approaches are generally adopted, namely, a conventional explosion-proof sheet is arranged on an exhaust side and is directly communicated with an exhaust pipeline of outdoor atmosphere, and the tail end of the exhaust pipeline is directly and fixedly inserted below the liquid level of a static water-sealed tank, and the liquid level is flushed by utilizing the air flow pressure after the explosion-proof sheet is broken to realize static bubbling and pressure relief. However, the prior art has objective defects when dealing with extreme working conditions of neodymium iron boron dust multiphase flow. Firstly, the direct exhaust mode can directly exhaust the pressure release airflow carrying high-temperature and high-activity neodymium iron boron micro powder into the atmosphere, the micro powder is in contact with external oxygen and is inevitably burnt violently, and the extremely large environmental damage and secondary fire risks exist, secondly, the conventional static liquid seal treatment mode lacks a mechanical buffer mechanism, when the ultrasonic airflow generated by millisecond explosion is faced, the transient high-pressure gas-solid two-phase flow directly impacts the tank bottom plate, and the objective risk of causing physical punching or structural tearing of the tank is generated, in addition, the aperture of a static pipeline is fixed, the airflow is concentrated, the gas-liquid contact area is limited, and the rapid cooling and physical isolation effects on a large amount of high-temperature dust are difficult to generate. Disclosure of Invention The invention aims to provide a flame-retardant and explosion-proof safety device for a neodymium iron boron hydrogen furnace, which converts air flow kinetic energy into mechanical energy by using the pressurized displacement of a sleeve to generate a buffering effect and disperses exhaust gas through side holes to achieve the purpose of improving the cooling and flame-retardant efficiency. In order to solve the technical problems, the invention adopts the following technical scheme: A flame-retardant explosion-proof safety device of a neodymium iron boron hydrogen cracking furnace is used for connecting a hydrogen cracking furnace body, and comprises a primary static seal pressure relief assembly, a secondary liquid seal trapping tank, a liquid trapping tank, a one-way valve assembly, a step shaft, a sleeve, a plurality of radial exhaust holes, a rebound assembly and a rebound assembly, wherein the primary static seal pressure relief assembly comprises a bursting piece which is connected to the exhaust side of the hydrogen cracking furnace body in a sealing mode and is opened under a set overpressure working condition, the diversion buffering pipeline and the secondary liquid seal trapping tank are sequentially communicated with the downstream of the primary static seal pressure relief assembly, the secondary liquid seal trapping tank is internally provided with the liquid trapping tank, the tail end of the diversion buffering pipeline extends to be an immersed tube immersed below the liquid level of the liquid trapping tank, the guide buffering pipeline is internally connected with the one-way valve assembly in series, the bottom of the immersed tube is integrally provided with the step shaft, the sleeve is sleeved outside the step shaft, the bottom of the sleeve is provided with a blind plate, the side wall of the sleeve is provided with a plurality of radial exhaust holes, the central position inside the sleeve is provided with the guide head, the upper part of the guide head is conical, the rebound assembly is used for applying an axial upward bias force to the sleeve, and the rebound trapping elastic force to the sleeve is used for generating downward displacemen