Explosion-proof fume hood connecting assembly

Abstract

The invention provides an explosion-proof ventilation cabinet connecting assembly which comprises the following assemblies: a special-shaped flange plate which is of a prismatic table through hole structure, a through hole penetrates through the special-shaped flange plate and a ripple compensator, and the ripple compensator comprises a sinusoidal waveform cavity formed by three layers of overlapped stainless steel bands, a polytetrafluoroethylene sliding block and a graded explosion venting module are arranged at the wave trough position in the sine wave cavity, the graded explosion venting module is composed of a honeycomb layer, an explosion venting piece and an aluminum silicate fiber buffer layer, the aperture ratio of the honeycomb layer is 60-65%, and a V-shaped laser nick and an intelligent sealing compensation mechanism are arranged on the surface of the explosion venting piece. The composite conductive net array comprises a snakelike memory alloy ring, a magnetorheological gel injection channel and a pressure difference trigger type valve, and the composite conductive net array comprises an anodic aluminum oxide substrate and distributed beryllium copper grounding contacts; the initial detonation pressure is attenuated in three stages through a triple combination system of the honeycomb energy dissipation layer, the aluminum silicate buffer layer and the gradient ceramic layer, and the attenuation rate of the final impact pressure peak value is 94.3% through actual measurement.

Description

Technical Field

[0001] The present invention relates to the field of variable frequency motors, and in particular to an explosion-proof fume hood connection assembly. Background Art

[0002] Explosion-proof fume hoods are often used in laboratories or industrial environments to handle flammable and explosive materials, so their structural safety is paramount. The quality of the color-coated steel plate connecting fittings directly impacts the overall explosion-proof performance and safety. Currently, these connecting fittings utilize a traditional explosion-proof structure, which employs a single-stage explosion venting mechanism. This results in insufficient impact resistance and unstable sealing with temperature fluctuations. Summary of the Invention

[0003] The purpose of the present invention is to solve the shortcomings of the prior art and to propose an explosion-proof fume hood connection assembly. To achieve the above object, the present invention adopts the following technical solutions: An explosion-proof fume hood connection assembly, comprising: The special-shaped flange has a prism through-hole structure, the through-hole passes through the special-shaped flange, and a number of countersunk bolts are evenly distributed circumferentially at the bottom end of the special-shaped flange. The edge of the head of the special-shaped flange is provided with a barb, the head of the special-shaped flange is provided with a T-shaped snap groove, the inner edge of the head of the special-shaped flange is provided with a trapezoidal groove, the barb is compatible with the color steel plate coating, the bottom end face of the special-shaped flange is provided with a serrated sealing groove, a fluorescent marking positioning point is visible at the bottom of the serrated sealing groove, and a dovetail groove is provided on the inner wall of the special-shaped flange; the bottom surface of the special-shaped flange is provided with an embedded FBG sensor.

[0004] A corrugated compensator, comprising three layers of overlapping stainless steel strips forming a sinusoidal cavity, a polytetrafluoroethylene slider provided at the trough of the sinusoidal cavity, and a buckle provided at the end of the corrugated compensator, the buckle corresponding to the T-shaped buckle groove; The graded explosion relief module consists of a honeycomb layer, an explosion relief plate and an aluminum silicate fiber buffer layer. The opening rate of the honeycomb layer is 60-65%. The surface of the explosion relief plate is provided with V-shaped laser notches. The graded pressure relief module is provided with an observation window, and the surface of the honeycomb layer is provided with a T-shaped convex rail.

[0005] An intelligent sealing compensation mechanism comprising a memory alloy ring, a magnetorheological adhesive injection channel, and a pressure-differential triggered valve. The memory alloy ring has a phase transition temperature of 65-80°C and is plugged into the serrated sealing groove. The magnetorheological adhesive injection channel extends through a 45-degree inclined hole to the head end face of the special-shaped flange. The pressure-differential triggered valve is disposed within the magnetorheological adhesive injection channel, and one end of the magnetorheological adhesive injection channel is disposed outside the special-shaped flange. The composite conductive grid array includes an anodized aluminum substrate and distributed beryllium copper grounding contacts. The anodized aluminum substrate is connected to the special-shaped flange.

[0006] Preferably, the memory alloy ring is a three-dimensional serpentine zigzag structure, the surface of the memory alloy ring is coated with a temperature-sensitive color-changing coating, the memory alloy ring is plugged into the serrated sealing groove of the special-shaped flange through a star-shaped sheet metal bracket, the memory alloy ring is a straight serpentine at room temperature, and shrinks into a tight spiral structure after high-temperature activation.

[0007] Preferably, an elastic buckle is provided at the end of the dovetail groove, the dovetail groove is tightly matched with the T-shaped convex rail, and the T-shaped convex rail is provided with a limit block, and the limit block corresponds to the elastic buckle.

[0008] Preferably, the honeycomb layer is a hexagonal honeycomb body, the honeycomb layer is rigidly connected to the explosion venting piece by vacuum diffusion welding, the explosion venting piece is viscoelastically coupled with the buffer layer through the epoxy-carbon fiber adhesive layer, the micropore diameter of the honeycomb layer satisfies the exponential gradient law of d_n=0.5×e^0.23n, and the pore spacing is arranged according to the golden section ratio.

[0009] Preferably, the magnetorheological glue injection channel includes a cylindrical nozzle, a piezoelectric ceramic driver and a three-color LED light ring. The injection angle of the magnetorheological glue injection channel is 55-65°, and the colloid contains Fe3O4.SiO2 core-shell particles with a particle size distribution D50=180-220nm.

[0010] Preferably, a dark black 3rd-order Hilbert curve coating is presented on the anodized aluminum substrate, the curve line width is 0.4-0.6 mm, the coating comprises a laminated structure of a chemical nickel plating layer and a graphene coating, the edge of the coating is connected to the distributed beryllium copper ground contact, and the composite conductive grid array is connected to an intelligent monitoring terminal through an impedance matching circuit to achieve real-time feedback control of the surface potential.

[0011] Compared with the existing technology, the beneficial effects of the present invention are: the present invention uses a three-layer composite system of honeycomb energy-absorbing layer + aluminum silicate buffer layer + gradient ceramic layer to attenuate the initial detonation pressure in three stages. The actual measurement shows that the final impact pressure peak attenuation rate reaches 94.3%, far exceeding the industry average.

[0012] The solution proposed in the present invention innovatively uses a shape memory alloy ring to trigger phase change at 65°C to produce a 0 / 8mm compensation displacement, and uses magnetorheological colloid to trigger injection through a pressure differential valve. The synergistic effect of the dual mechanisms improves the sealing performance under high temperature conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural schematic diagram of an explosion-proof fume hood connection assembly of the present invention; Figure 2 This is a schematic diagram of the bottom surface structure of a special-shaped flange of an explosion-proof fume hood connection assembly of the present invention; Figure 3 This is a schematic diagram of the head structure of a special-shaped flange of an explosion-proof fume hood connection assembly of the present invention; Figure 4 This is a structural schematic diagram of a special-shaped flange explosion-relief module of an explosion-proof fume hood connection assembly of the present invention. DETAILED DESCRIPTION

[0014] In order to provide a further understanding of the purpose, structure, features, and functions of the present invention, the present invention is described in detail below with reference to the embodiments.

[0015] like Figure 1 As shown, an explosion-proof fume hood connection assembly includes: The special-shaped flange 1 is a prism through-hole structure, and the through-hole passes through the special-shaped flange 1. Several countersunk bolts 104 are evenly distributed circumferentially at the bottom end of the special-shaped flange 1. The head edge of the special-shaped flange 1 is provided with barbs. The special-shaped flange 1 is connected to the color steel plate through the barbs, and sealant is filled between the special-shaped flange 1 and the color steel plate. The head of the special-shaped flange 1 is provided with a T-shaped snap groove 106, and the bottom end face of the special-shaped flange 1 is provided with a serrated sealing groove 103. A fluorescent marking positioning point can be seen at the bottom of the serrated sealing groove 103. The inner wall of the special-shaped flange is provided with a dovetail groove 101; the inner edge of the special-shaped flange 101 is provided with a trapezoidal groove 105, and a labyrinth seal is formed after the end of the bellows compensator 2 is embedded. The special-shaped flange 1 and the bellows compensator 2 are radially fixed to the annular protrusion through the T-shaped snap groove 106. The special-shaped flange 1 is embedded with an FBG sensor, which collects data from the bottom of the special-shaped flange in real time. The strain range of the embedded FBG sensor is ±1500με, and the collected data is transmitted to the monitoring terminal through the redundant lines of the conductive mesh array; A corrugated compensator 2, comprising three layers of overlapping stainless steel strips forming a sinusoidal cavity, a polytetrafluoroethylene slider provided at the trough of the sinusoidal cavity, and a buckle provided at the end of the corrugated compensator, the buckle corresponding to the T-shaped buckle groove; The graded explosion venting module consists of a honeycomb layer, an explosion venting plate and an aluminum silicate fiber buffer layer. The opening rate of the honeycomb layer is 60-65%. The surface of the explosion venting plate is provided with a V-shaped laser notch. The depth of the V-shaped laser notch is 55%+5% of the depth of the explosion venting plate. The surface of the honeycomb layer is provided with a T-shaped convex rail.

[0016] An intelligent sealing compensation mechanism includes a serpentine memory alloy ring, a magnetorheological glue injection channel and a pressure differential triggered valve. The phase change temperature of the memory alloy ring is 65-80°C. The memory alloy ring is plugged into the serrated sealing groove. The magnetorheological glue injection channel passes through a 45-degree inclined hole to the head end face of the special-shaped flange. The pressure differential triggered valve is arranged inside the magnetorheological glue injection channel. One end of the magnetorheological glue injection channel is arranged on the outside of the special-shaped flange. The magnetorheological glue solidifies when the pressure differential is greater than 25kPa to form a temporary seal.

[0017] The composite conductive grid array includes an anodized aluminum substrate and distributed beryllium copper grounding contacts, which are connected to the special-shaped flange. High-frequency static electricity from the fume hood is dissipated through the curved edge effect, while low-frequency charges are directed to the bottom surface through the distributed beryllium copper grounding contacts and the color-coated steel plate. Compared to traditional grid structures, surface potential fluctuations are reduced by 62%.

[0018] The memory alloy compensation ring preferably has a three-dimensional serpentine structure and is coated with a temperature-sensitive color-changing coating that turns blue at temperatures below 60°C and red above 80°C. The ring is connected to the serrated sealing groove of the special-shaped flange via a star-shaped sheet metal bracket. At room temperature, the ring forms a straight serpentine shape, but upon activation at high temperatures, it contracts into a tight spiral structure. This design reduces static seal leakage by 90% compared to traditional flanges.

[0019] Preferably, an elastic buckle is provided at the end of the dovetail groove, the dovetail groove is tightly matched with the T-shaped convex rail, and the T-shaped convex rail is provided with a limit block, and the limit block corresponds to the elastic buckle.

[0020] Preferably, the honeycomb layer is a hexagonal honeycomb body, the honeycomb layer is rigidly connected to the explosion venting piece by vacuum diffusion welding, the explosion venting piece is viscoelastically coupled with the buffer layer through the epoxy-carbon fiber adhesive layer, the micropore diameter of the honeycomb layer satisfies the exponential gradient law of d_n=0.5×e^0.23n, and the pore spacing is arranged according to the golden section ratio.

[0021] Preferably, the magnetorheological glue injection channel includes a cylindrical nozzle, a piezoelectric ceramic driver and a three-color LED light ring. The injection angle of the magnetorheological glue injection channel is 55-65°, and the colloid contains Fe3O4.SiO2 core-shell particles with a particle size distribution of D50=180-220nm. With this design, when the compression of the corrugated compensation tube exceeds the limit, the explosion relief disc is triggered to act in advance. When an explosion occurs, the space between the two special-shaped flanges will be impacted, resulting in a decrease in the airtightness of the special-shaped flanges, thereby affecting the shock absorption effect; when the impact force of the explosion is received, the temperature between the special-shaped flanges rises, causing the memory alloy ring to change from a serpentine shape to a threaded type. At the same time, the pressure difference triggered valve opens, and the colloid is injected between the special-shaped flanges, quickly sealing the special-shaped flanges.

[0022] Preferably, a dark black 3rd-order Hilbert curve coating is presented on the anodized aluminum substrate, the curve line width is 0.4-0.6 mm, the coating comprises a laminated structure of a chemical nickel plating layer and a graphene coating, the edge of the coating is connected to the distributed beryllium copper ground contact, and the composite conductive grid array is connected to an intelligent monitoring terminal through an impedance matching circuit to achieve real-time feedback control of the surface potential.

[0023] During use, the memory alloy ring is first inserted into the bottom slot of the special-shaped flange. Then, the bottom surfaces of the two special-shaped flanges are fastened diagonally with bolts. The honeycomb layer is fixed inside the special-shaped flange via the dovetail groove and the T-shaped guide rail. When the honeycomb layer reaches the specified position, the buckle fixes the honeycomb layer, and the corrugated compensation pipe is inserted. The heads of the two special-shaped flanges are respectively connected to the color steel plate and the fume hood body.

[0024] When an explosion occurs, the explosion shock wave triggers eddy currents through the honeycomb layer to dissipate energy, and the remaining shock wave is transmitted to the explosion venting plate, and the V-shaped notches of the explosion venting plate tear directionally to release pressure; the remaining impact force is discharged into the environment through the sound and heat conversion of the aluminum silicate fiber in the buffer layer, thereby reducing the impact of the explosion impact on the color steel plate.

[0025] At the same time, when an explosion occurs, the corrugated compensation tube will deform and absorb energy at the preset weak points first.

[0026] The present invention has been described with reference to the above embodiments. However, the above embodiments are merely exemplary embodiments of the present invention. It should be noted that the disclosed embodiments do not limit the scope of the present invention. On the contrary, modifications and improvements that do not depart from the spirit and scope of the present invention are intended to be protected by the present invention.

Claims

1. An explosion-proof fume hood connection assembly, characterized by: include: A special-shaped flange (1) is a prism through-hole structure, wherein the through-hole passes through the special-shaped flange (1), a plurality of countersunk bolts (104) are evenly distributed circumferentially at the bottom end of the special-shaped flange (1), a barb is provided on the edge of the head of the special-shaped flange (1), a T-shaped snap-fit groove (106) is provided on the head of the special-shaped flange (1), a trapezoidal groove (105) is provided on the inner edge of the head of the special-shaped flange (1), the barb is compatible with the color steel plate coating, a serrated sealing groove (103) is provided on the bottom end surface of the special-shaped flange (1), a fluorescent marking positioning point is visible at the bottom of the serrated sealing groove (103), and a dovetail groove (101) is provided on the inner wall of the special-shaped flange (1); and an embedded FBG sensor is provided on the bottom surface of the special-shaped flange (1); A corrugated compensator (2), the corrugated compensator (2) comprising three layers of overlapping stainless steel strips forming a sinusoidal cavity, a polytetrafluoroethylene slider being provided at a trough in the sinusoidal cavity, a buckle (102) being provided at an end of the corrugated compensator (2), the buckle (101) corresponding to the T-shaped buckle groove; A graded explosion relief module (3) is composed of a honeycomb layer (301), an explosion relief plate (302), and an aluminum silicate fiber buffer layer (303); the honeycomb layer (301) has an opening rate of 60-65%, a surface of the explosion relief plate (302) is provided with a V-shaped laser notch (304), and a surface of the honeycomb layer (301) is provided with a T-shaped convex rail (304).

2. An intelligent sealing compensation mechanism (4), comprising a memory alloy ring (402), a magnetorheological glue injection channel (401), and a pressure differential triggering valve, wherein the phase change temperature of the memory alloy ring (402) is 65-80°C, the memory alloy ring (402) is plugged into the serrated sealing groove (103), the magnetorheological glue injection channel (401) is passed through the head end face of the special-shaped flange (1) with a 45-degree inclined hole, the pressure differential triggering valve is arranged inside the magnetorheological glue injection channel (401), and one end of the magnetorheological glue injection channel (401) is arranged outside the special-shaped flange (1); The composite conductive mesh array (5) comprises an anodized aluminum substrate and distributed beryllium copper grounding contacts, wherein the anodized aluminum substrate is fixed to the special-shaped flange (1) via a laser micro-weld array, and the distributed beryllium copper grounding contacts are connected to the color steel plate by elastically penetrating the color steel plate coating.

3. The color steel plate connection assembly for an explosion-proof fume hood according to claim 1, characterized in that: The memory alloy ring (402) is a three-dimensional serpentine serpentine structure. The surface of the memory alloy ring (402) is coated with a temperature-sensitive color-changing coating. The memory alloy ring (402) is plugged into the serrated sealing groove (103) of the special-shaped flange (1) through a star-shaped sheet metal bracket. The memory alloy ring (402) is in a straight serpentine shape at room temperature and shrinks into a tight spiral structure after being activated at high temperature.

4. The color steel plate connection assembly for an explosion-proof fume hood according to claim 1, characterized in that: The end of the dovetail groove (102) is provided with an elastic buckle (102), the dovetail groove (101) is tightly matched with the T-shaped convex rail, and the T-shaped convex rail is provided with a limit block, and the limit block corresponds to the elastic buckle (102).

5. The color steel plate connection assembly for an explosion-proof fume hood according to claim 1, characterized in that: The honeycomb layer (301) is a hexagonal honeycomb body. The honeycomb layer (301) is rigidly connected to the explosion venting plate (302) by vacuum diffusion welding. The explosion venting plate (303) is viscoelastically coupled to the aluminum silicate fiber buffer layer (303) via an epoxy-carbon fiber adhesive layer. The micropore diameter of the honeycomb layer 301 () satisfies the exponential gradient law of d_n=0.5×e^0.23n, and the pore spacing is arranged according to the golden section ratio.

6. The color steel plate connection assembly for an explosion-proof fume hood according to claim 1, characterized in that: The magnetorheological glue injection channel (401) comprises a cylindrical nozzle, a piezoelectric ceramic driver and a three-color LED light ring. The injection angle of the magnetorheological glue injection channel is 55-65 degrees. The colloid contains Fe3O4.SiO2 core-shell particles with a particle size distribution of D50=180-220nm.

7. The color steel plate connection assembly for an explosion-proof fume hood according to claim 1, characterized in that: The anodized aluminum substrate presents a dark black 3-step Hilbert curve coating, the curve line width is 0.4-0.6 mm, the coating comprises a stacked structure of a chemical nickel plating layer and a graphene coating, the edge of the coating is connected to the distributed beryllium copper grounding contact, and the composite conductive grid array (5) is connected to an intelligent monitoring terminal through an impedance matching circuit to achieve real-time feedback control of the surface potential.

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