Anti-explosion delivery window applied to material conveying of anti-explosion chamber

Abstract

The utility model belongs to the technical field of anti-explosion protection, and discloses an anti-explosion delivery window applied to material conveying of an anti-explosion compartment, which comprises inner side cushion frames arranged at the edges of the inner side and the outer side of an anti-explosion window, and an upper pressing frame, a side pressing frame and a lower pressing frame are arranged on one side, far away from a wall body, of each inner side cushion frame. An L-shaped notch is formed in the inner side of the lower plate edge of the upper pressing frame, the L-shaped notch and the inner side cushion frame form a first limiting groove with a downward opening, the lower pressing frame comprises a lower pressing plate and a cushion block, a second limiting groove with an upward opening is formed among the upper side of the lower pressing plate, the cushion block and the inner side cushion frame, and an anti-explosion window plate is jointly arranged in the first limiting groove and the second limiting groove in a sliding mode; the driving air cylinder is arranged on the wall body and is used for driving the anti-explosion window plate to slide. When the anti-explosion window plate on one side of the anti-explosion window is in the open state, the anti-explosion window plate on the other side of the anti-explosion window is in the closed state, the interior of the anti-explosion chamber is isolated from the external space, and therefore the influence of internal explosion on the outside in the material conveying process is effectively avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of blast protection, especially relates to a blast-resistant transfer window applied to blast-resistant chamber material transmission. BACKGROUND

[0002] In recent years, production safety has been highly valued. Through the analysis of explosion accidents in the hazardous product production industry, it is found that the expansion of the explosion effect range in the blast-resistant chamber is often caused by unreasonable design of the blast-resistant transfer window. With the in-depth study of the blast-resistant transfer window, the destruction process of the blast-resistant transfer window in the past production line explosion accidents is simulated by using numerical simulation software, and a more scientific and in-depth understanding of the destruction of the blast-resistant transfer window is obtained. That is, in addition to bearing the positive pressure effect of the explosion shock wave, the blast-resistant transfer window will also rebound during the dynamic response (high-frequency superimposed vibration) of the window plate, and the rebound effect will generate a thrust on the window frame and the restraining member (compression frame) in contact with the elastic window plate, forming a bending moment on the vertical flange of the L-shaped compression frame, causing the restraining member of the blast-resistant transfer window to bend and deform, resulting in the loss of restraint of the blast-resistant window plate, and the blast-resistant window plate flying off (the window plate escapes from the restraint and flies out under the action of the explosion shock). In addition, the high-speed fragments produced by the accidental explosion in the blast-resistant chamber will penetrate (i.e. penetrate and penetrate) the blast-resistant window plate, causing the protective effect of the blast-resistant transfer window to fail.

[0003] In the Chinese utility model patent with publication number CN220869235U, an automatic blast-resistant window device applied to an explosion-proof wall is disclosed, which comprises an explosion-proof wall body, an explosion-resistant window is arranged on the explosion-proof wall body, a protection assembly and a telescopic assembly are arranged on the explosion-proof wall body; the protection assembly comprises a main baffle and a frame body, the frame body is installed on the wall of the blast-resistant chamber as a pre-embedded part during wall pouring, a slide module is arranged on the frame body, and the slide module is connected with the main baffle in a sliding mode; the main baffle is connected with the telescopic assembly, and the telescopic assembly comprises a gas cylinder, one end of the gas cylinder is connected with the main baffle, and the other end of the gas cylinder is connected with the explosion-proof wall body.

[0004] According to the related technology in the above, the utility model person thinks that there are the following defects: the above-mentioned scheme only designs a layer of main baffle, which will cause the blast-resistant chamber to be connected with the outside during the material transmission process, and once an explosion occurs, it will affect the safety of the external personnel, and it is also easy to cause the blast-resistant chamber to transmit and propagate the explosion. Utility model content

[0005] In order to solve the above problems, the utility model provides a blast-resistant transfer window applied to blast-resistant chamber material transmission.

[0006] The above technical purpose of the utility model is realized through the following technical scheme: an anti-explosion transmission window applied to anti-explosion chamber material transmission, which comprises an inner side pad frame arranged at the two side edges of the anti-explosion window, wherein the inner side pad frame is provided with an upper pressing frame, a side pressing frame and a lower pressing frame on the side away from the wall, an L-shaped notch is formed in the inner side of the lower plate edge of the upper pressing frame, the L-shaped notch and the inner side pad frame form a first limiting groove with the opening downward, the lower pressing frame comprises a lower pressing plate, and a pad block is arranged between the lower pressing plate and the inner side pad frame, a second limiting groove with the opening upward is formed between the upper side of the lower pressing plate, the pad block and the inner side pad frame, and the groove widths of the first limiting groove and the second limiting groove are consistent, and an anti-explosion window plate is arranged in the first limiting groove and the second limiting groove and slides in the first limiting groove and the second limiting groove; and a driving cylinder is arranged on the wall and used for driving the anti-explosion window plate to slide.

[0007] Through the above technical scheme, the inner side pad frame, the upper pressing frame, the side pressing frame, the lower pressing frame, the anti-explosion window plate and the driving cylinder are arranged on the two sides of the anti-explosion window, when the anti-explosion window plate on one side of the anti-explosion window is in the open state, the anti-explosion window plate on the other side is in the closed state, the anti-explosion window is always in the closed state during the material transmission process, the inner space of the anti-explosion chamber is isolated from the outer space of the anti-explosion chamber, and the influence of the internal explosion on the outside during the material transmission process is effectively avoided.

[0008] Further, the pad block is provided with a plurality of pad blocks, which are arranged at intervals along the length direction of the lower pressing frame, a plurality of guide wheel shafts are arranged on the two sides of the pad block and fixed on the inner side pad frame, the length direction of the guide wheel shaft is perpendicular to the plate surface of the lower pressing plate, and a window plate guide wheel is rotatably arranged on the guide wheel shaft.

[0009] Through the above technical scheme, the guide wheel shaft and the window plate guide wheel are arranged, and the sliding resistance of the anti-explosion window plate can be effectively reduced. The pad block is arranged between the lower pressing frame and the inner side pad frame, so that the friction force generated by the direct contact between the lower pressing frame and the window plate guide wheel is prevented, and the rotation of the window plate guide wheel is affected.

[0010] Further, the window plate guide wheel is in the shape of a donut with a hole in the middle, and the inner hole diameter of the window plate guide wheel is 1mm larger than the diameter of the guide wheel shaft.

[0011] Through the above technical scheme, the inner hole diameter of the window plate guide wheel is set to be 1mm larger than the diameter of the guide wheel shaft, so that the window plate guide wheel can freely rotate on the guide wheel shaft.

[0012] Further, the inner side pad frame, the upper pressing frame, the side pressing frame and the lower pressing frame are all provided with through holes, and the upper pressing frame and the inner side pad frame on the two sides of the anti-explosion window, the side pressing frame and the inner side pad frame, and the lower pressing frame and the inner side pad frame are fixedly connected through the through holes by means of the draw bolts.

[0013] By adopting the technical scheme, the through hole is arranged, the compression plates on the inner and outer sides of the anti-explosion window are fixedly connected with the inner side pad frame by using the draw bolt, so that the inner and outer sides are formed into a whole and are fixed to the wall body firmly, and the stability of the whole window structure is improved.

[0014] In conclusion, the utility model has the following beneficial effects: in the application, the inner side pad frame, the upper compression frame, the side compression frame, the lower compression frame, the anti-explosion window plate and the driving cylinder are arranged on the inner and outer sides of the anti-explosion window, when the anti-explosion window plate on one side of the anti-explosion window is in the open state, the anti-explosion window plate on the other side is in the closed state, the anti-explosion window is ensured to be in the closed state during the material transmission process, the inside space of the anti-explosion chamber is isolated from the outside space of the anti-explosion chamber, so that the influence of the internal explosion on the outside during the material transmission process is effectively avoided, and the thicknesses of the upper compression frame, the side compression frame, the lower compression frame and the anti-explosion window plate are designed, so that the anti-explosion window plate is prevented from being penetrated by the explosion fragments / pieces and from flying off under the rebound effect, and the production safety is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 is the overall structure schematic view of the embodiment of the utility model;

[0016] Fig. 2 is the structure schematic view of the embodiment of the utility model after hiding the lower compression frame.

[0017] In the drawing: 1, inner side pad frame; 2, upper compression frame; 21, first limiting groove; 3, side compression frame; 4, lower compression frame; 41, lower compression plate; 42, pad block; 43, second limiting groove; 44, guide wheel shaft; 45, window plate guide wheel; 5, anti-explosion window plate; 6, driving cylinder; 7, draw bolt. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application; obviously, the described embodiments are only part of the embodiments of the application, not all the embodiments of the application, and all other embodiments obtained by a person of ordinary skill in the art without creative labor on the basis of the embodiments in the application belong to the protection scope of the application.

[0019] As Figs. 1-2As shown, the application discloses an anti-explosion transfer window applied to anti-explosion chamber material transmission, which comprises an inner side pad frame 1, an upper pressing frame 2, a side pressing frame 3, a lower pressing frame 4, an anti-explosion window plate 5 and a driving cylinder 6 arranged at both sides of the anti-explosion window. The upper pressing frame 2, the side pressing frame 3 and the lower pressing frame 4 are arranged at the side of the inner side pad frame 1 away from the wall body, and are used for mounting the anti-explosion window plate 5 and limiting the sliding direction of the anti-explosion window plate 5. The cylinder body part of the driving cylinder 6 is arranged on the wall body, and the piston rod end is connected with the anti-explosion window plate 5, and is used for driving the anti-explosion window plate 5 to slide.

[0020] Specifically, an L-shaped notch is arranged at the inner side of the lower plate edge of the upper pressing frame 2, and the L-shaped notch and the inner side pad frame 1 form a first limiting groove 21 opening downward. The lower pressing frame 4 comprises a lower pressing plate 41, and a pad block 42 is arranged between the lower pressing plate 41 and the inner side pad frame 1. The upper edge of the pad block 42 is lower than the upper edge of the lower pressing plate 41, so that a second limiting groove 43 opening upward is formed between the lower pressing plate 41, the pad block 42 and the inner side pad frame 1, and the anti-explosion window plate 5 is arranged to slide in the first limiting groove 21 and the second limiting groove 43. When arranged, the groove width of the first limiting groove 21 and the second limiting groove 43 is consistent and slightly larger than the thickness of the anti-explosion window plate 5, so that the anti-explosion window plate 5 can slide horizontally in the first limiting groove 21 and the second limiting groove 43; the depth of the first limiting groove 21 and the second limiting groove 43 is 2mm larger than the thickness of the anti-explosion window plate 5, so as to limit the window plate from falling off due to impact deformation under the action of the shock wave load.

[0021] The pad block 42 is arranged in a plurality of manners and is arranged in a length direction of the lower pressing frame 4. A plurality of guide wheel shafts 44 are arranged on both sides of the pad block 42 and are fixed on the inner side pad frame 1. The guide wheel shaft 44 is made of conventional steel material stud, and a thread is arranged at the end part, and the length direction is perpendicular to the plate surface of the lower pressing plate 41. When arranged, the thread at the end part is arranged on the inner side pad frame 1. A window plate guide wheel 45 is arranged to rotate on the guide wheel shaft 44. The window plate guide wheel 45 is in the form of a whole circle cake with a hole in the middle, and the inner hole diameter is 1mm larger than the diameter of the guide wheel shaft 44, so that the window plate guide wheel 45 can rotate freely on the guide wheel shaft 44. The lower plate edge of the anti-explosion window plate 5 is located on the window plate guide wheel 45, and the resistance of the anti-explosion window plate 5 when sliding can be effectively reduced through the window plate guide wheel 45.

[0022] The inner side pad frame 1, the upper pressing frame 2, the side pressing frame 3, the lower pressing plate 41 and the pad block 42 are all made of steel plates of Q235 or Q345 or Q355 steel material, and have good welding performance and plasticity. When arranged, the thickness of the inner side pad frame 1 is 10mm, the thickness of the upper pressing frame 2, the side pressing frame 3 and the lower pressing frame 4 is 20mm, and the thickness of the pad block 41 is 10mm.

[0023] The through holes are arranged on the inner side pad frame 1, the upper pressing frame 2, the side pressing frame 3 and the lower pressing frame 4, and the through holes are connected by the draw bolt 7. Specifically, the diameter of the through hole is 19-20 mm, the draw bolt 7 is a high-strength bolt with a diameter of not less than 18 mm, and in use, the draw bolt 7 penetrates the upper pressing frame 2 and the inner side pad frame 1 on the inner and outer sides of the blast-resistant window to fixedly connect the upper pressing frame 2 and the inner side pad frame 1 on the two sides, the draw bolt 7 penetrates the side pressing frame 3 and the inner side pad frame 1 on the inner and outer sides of the blast-resistant window to fixedly connect the side pressing frame 3 and the inner side pad frame 1 on the two sides, and the draw bolt 7 penetrates the lower pressing frame 4 and the inner side pad frame 1 on the inner and outer sides of the blast-resistant window to fixedly connect.

[0024] The embodiment of the application discloses a blast-resistant transfer window design method applied to blast-resistant chamber material transmission.

[0025] S1: calculate the blast-resistant window plate thickness H not penetrated by explosion fragments, and the formula is as follows:

[0026]

[0027] In the formula, A is the maximum windward area (m 2 ) of the fragment; m f is the mass (kg) of the fragment; V s is the target speed (m / s) of the fragment; and C is the static resistance constant of the steel window plate material.

[0028] The value of the static resistance constant C of the steel window plate material is determined by the following method.

[0029] Metal fragment penetration steel target plate verification tests are carried out by using a smoothbore gun, spherical and cubic 3-16g tungsten alloy metal fragments are selected as the fragments, and 20-40mm thick Q235 and Q345 steel plates are selected as the target plates; the maximum kinetic energy of the fragments is 15KJ, the maximum initial speed is 2150±15m / s, and a total of 146 penetration tests are carried out.

[0030] The test data are respectively substituted into the Christman-gehring formula, the dimension formula and the De Marre formula to form a regular curve.

[0031] The regular curve and the test data curve are compared for coincidence to determine that the expression formula is the dimension formula.

[0032] The test data are substituted into the dimension formula to solve the value of C. In the embodiment, C=5.45Gpa.

[0033] S2: the distance from the explosion center to the blast-resistant transfer window center, the blast-resistant chamber design charge and the blast-resistant window plate size are substituted into the equivalent static load value calculation formula to calculate the equivalent static load q e generated on the blast-resistant transfer window under the action of the air shock wave.

[0034] Equivalent static load q e The following formula is used for calculation:

[0035] When t≤T / 2: q e = i m ωε;

[0036] When t>T / 2:

[0037] Wherein: t is the equivalent time (s) of the positive pressure of the air shock wave acting on the blast-resistant window panel; T is the natural period of the blast-resistant transfer window (s); i m is the average impulse (kg-s / m 2 ) of the blast shock wave acting on the blast-resistant window panel in the blast-resistant chamber; ω is the natural circular frequency (1 / s) of the blast-resistant window panel; and ε is the damping effect coefficient.

[0038] S3: According to the size of the window panel, the equivalent static load q e is converted into a concentrated force, which is substituted into the shear strength calculation formula, to check the thickness H of the blast-resistant window panel, so that the thickness H of the blast-resistant window panel that can withstand the equivalent static load and resist the penetration of blast fragments is obtained. c .

[0039] S4: According to the equivalent static load q e , the rebound load R generated after the positive pressure unloading of the blast-resistant transfer window is calculated, and the standard values q a , q b of the unit length force of the upper and lower pressing frames and the side pressing frames are calculated.

[0040] The rebound load R is calculated using the following formula:

[0041] R=mq e

[0042] Wherein: m is the rebound coefficient.

[0043] The rebound coefficient m is determined by the following method:

[0044] An anti-blast transfer window rebound test model is established based on the fluid-structure coupling algorithm using the Autodyn simulation calculation software, the shock wave pressure time history curve is calculated based on the Brode explosion shock wave formula, and it is loaded onto the anti-blast transfer window model according to the three-dimensional mapping calculation method, to obtain the dynamic response characteristic parameters of the anti-blast transfer window;

[0045] A rebound force testing device for blast-resistant transfer window was designed, and a rebound force testing platform was built in the field. The static blast test was carried out in the field with 20-280 Kg TNT charge as the explosion source (to generate shock wave). The thickness of the blast-resistant transfer window panel tested was 15-38 mm, the equivalent static load borne by the window panel was about 1.8-4.2 MPa, and the explosion test was carried out for 24 times.

[0046] The simulation results were compared with the measured parameters of the explosion test. Based on the measured data of the explosion test, the obviously deviated working condition parameters in the simulation model were corrected by supplementing material mechanics performance test or adjusting model grid division, etc. The regular simulation model with high reliability for amplification and extrapolation (error between simulation and test results ≤8%) was obtained, and the simulation test under different working conditions was carried out based on the simulation model. The rebound force borne by the blast-resistant window panel accounts for 0.7 of the equivalent static load borne by the window panel (rebound coefficient m).

[0047] Standard value of unit length force of upper and lower pressing frame and side pressing frame q a , q b The calculation formula is as follows:

[0048] q a = Rγ a a

[0049] q b = Rγ b b

[0050] In the formula, γ a , γ b are rebound force distribution coefficients along the upper and lower pressing frames and the side pressing frame, respectively, and are taken according to the following table; a and b are the blast-resistant width and height (m) of the blast-resistant window panel, respectively.

[0051] Table 1 Rebound force distribution coefficients

[0052] a / b 0.428 0.44 0.50 0.6 0.67 0.7 0.8 0.9 1.0 a ]]> ​ 0.42 0.44 0.44 0.46 0.46 0.46 0.48 0.50 0.50 b ]]> ​ 0.58 0.56 0.56 0.54 0.54 0.54 0.52 0.50 0.50

[0053] S5: Calculate the rebound force pressure value F borne by the pressing frame. The calculation formula is as follows:

[0054] F = q × a × b

[0055] When the upper and lower pressing frames are calculated, q = 0.5q a When the side pressing frame is calculated, when there are side pressing frames on both sides of the blast-resistant transfer window, q = 0.5q b When there is only a side pressing frame on one side of the blast-resistant transfer window, q = qb.

[0056] S6: Calculate the thickness H k of the pressing frame according to the shear strength of the pressing frame material. The calculation formula is as follows:

[0057]

[0058] In the formula: h is the width of the compression frame (mm), f v is the design value of the shear strength of the compression frame material (N / mm 2 ).

[0059] The thickness of the anti-blast window plate and the compression frame is designed by using the above method, so that the anti-blast window plate will not be penetrated by the explosion fragments under the condition of explosion in the anti-blast chamber, and will not be thrown off by the rebound effect and be released from the restraint of the compression frame.

[0060] The preferred embodiments of the present application have been described above, the protection scope of the present application is not limited to the above-mentioned embodiments, any technical solutions falling within the concept of the present application shall fall within the protection scope of the present application. It should be noted that, for ordinary skilled in the art, some improvements and refinements without departing from the principles of the present application, these improvements and refinements shall also be considered as the protection scope of the present application.

Claims

1. A blast-resistant transfer window for use in blast-resistant interchamber material transfer, characterized by: The application relates to an anti-blast window, which comprises an inner pad frame arranged at the two side edges of the anti-blast window, wherein the upper pressing frame, the side pressing frame and the lower pressing frame are arranged on the side away from the wall body; an L-shaped gap is formed in the inner side of the lower plate edge of the upper pressing frame, the L-shaped gap and the inner pad frame form a first limiting groove which opens downward, the lower pressing frame comprises a lower pressing plate, a pad block is arranged between the lower pressing plate and the inner pad frame, a second limiting groove which opens upward is formed among the upper side of the lower pressing plate, the pad block and the inner pad frame, the groove width of the first limiting groove and the second limiting groove is consistent, and an anti-blast window plate is slidably arranged in the first limiting groove and the second limiting groove; and a driving air cylinder is arranged on the wall body and used for driving the anti-blast window plate to slide.

2. The anti-knock transfer window for use in anti-knock chamber material transfer according to claim 1, characterized in that: The pad block is arranged in a plurality of groups and is arranged along the length direction of the lower pressing frame, guide wheel shafts are arranged on the two sides of the pad block and are fixed on the inner pad frame, the length direction of the guide wheel shaft is perpendicular to the plate surface of the lower pressing plate, and a window plate guide wheel is rotatably arranged on the guide wheel shaft.

3. The anti-knock transfer window for use in anti-knock plenum material transfer of claim 2, wherein: The window plate guide wheel is in the shape of a round cake with a hole in the middle, and the inner hole diameter is 1mm larger than the diameter of the guide wheel shaft.

4. The anti-knock transfer window for use in anti-knock plenum material transfer of claim 1, wherein: Holes are formed in the upper pressing frame, the side pressing frame, the lower pressing frame and the inner pad frame, and the upper pressing frame and the inner pad frame, the side pressing frame and the inner pad frame and the lower pressing frame and the inner pad frame are fixedly connected by passing through the holes and using a tension bolt.

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