Turning plate type one-way explosive-proof valve suitable for metal dust

Abstract

The utility model discloses a turning plate type one-way explosive-proof valve suitable for metal dust, which relates to the technical field of explosive-proof of metal dust and comprises an explosive-proof valve shell, an explosive-proof valve upper cover, a feeding pipe, a discharging pipe, a fire retardant plate and a locking mechanism. According to the turning plate type one-way explosion-proof valve suitable for the metal dust, the stroke between the fire-retardant main plate and the inlet pipeline is shortened through the use of the limiting cross beam, high-speed flames and pressure waves generated by explosion of the metal dust can be effectively isolated, secondary explosion and repeated explosion are prevented, and therefore the safety of personnel and equipment is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of metal dust explosion isolation, in particular to a flap type one-way explosion isolation valve suitable for metal dust. Background Art

[0002] With the development of modern industry, the potential danger of dust explosion has greatly increased. When mixed with air during processing, handling or storage operations, the explosion will cause the ignition of combustible gas, mist or dust, and a rapid pressure rise will occur in the closed structure. At the same time, if there is not enough strength to withstand the deflagration pressure, it will cause significant losses and casualties. In order to prevent the occurrence of fire and explosion accidents, strict explosion-proof measures need to be taken. Explosion-proof technology can block the destructive effects of pressure waves and flames from the process equipment of dust explosion along the installation pipeline to other process equipment, isolate the explosion locally, and more effectively curb the occurrence of secondary explosions of combustible dust.

[0003] A new type of fire-proof plate-type one-way explosion-proof valve with application number CN202020943864.8 can only be used for explosion-proof of non-violent explosions such as non-metallic dust due to its long structural stroke and slow closing time. However, for metal dust, such as aluminum, magnesium, zinc and other metal dusts with unstable chemical properties, there is no effective explosion-proof product. In summary, it is necessary to invent a flap type one-way explosion-proof valve suitable for metal dust. Utility Model Content

[0004] The purpose of the utility model is to provide a flap-type one-way explosion-proof valve suitable for metal dust, so as to solve the problem that the existing explosion-proof valve device proposed in the above-mentioned background technology can only be used for explosion-proof of non-violent explosions such as non-metallic dust due to its long structural stroke and slow closing time. However, for metal dust, such as aluminum, magnesium, zinc and other metal dusts with unstable chemical properties, there is no effective explosion-proof product.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a flap-type one-way explosion-proof valve suitable for metal dust, comprising an explosion-proof valve shell and an explosion-proof valve cover connected to the top thereof by bolts, a feed pipe is provided on the left side of the explosion-proof valve shell, and a discharge pipe is provided on the right side, a fire-blocking plate is provided inside the explosion-proof valve shell, and the shaft of the fire-blocking plate is connected to a locking mechanism provided on the outside of the explosion-proof valve shell; an explosion-proof valve base is welded and fixed on the bottom surface of the explosion-proof valve shell; a lifting ear is provided at each of the four corners of the top surface of the explosion-proof valve cover, and a handle is provided in the middle of the top surface; the fire-blocking plate is included in the explosion-proof valve A fire-blocking plate main shaft is arranged above the feed main pipe in the shell, and a fire-blocking main board which can rotate with the fire-blocking main shaft as an axis is arranged on the fire-blocking plate main shaft, and the fire-blocking main board can close the feed pipe opening, and the front and rear ends of the fire-blocking plate main shaft respectively penetrate the front and rear side walls of the explosion-proof valve shell and are connected to the side walls through bearings and bearing seats; one end or both ends of the fire-blocking plate main shaft are connected to the outside of the explosion-proof valve shell with a locking mechanism; a reinforcing rod is provided at the center of the right side surface of the fire-blocking main board by bolts; a limiting cross beam is provided between the front and rear side walls of the explosion-proof valve shell by bolts, and the reinforcing rod rests on the limiting cross beam after the fire-blocking main board is opened.

[0006] Preferably, the explosion-proof valve base can be a rectangular frame and welded as a whole on the bottom surface of the explosion-proof valve housing, or four support blocks are respectively located at the four corners of the bottom surface of the explosion-proof valve housing, or two long strip support beams are respectively welded at the left and right sides of the bottom surface of the explosion-proof valve housing.

[0007] Preferably, the feed pipe includes a feed flange at the left end, and a feed main pipe is arranged on its right side surface, the right end of the feed main pipe penetrates into the interior of the explosion-proof valve housing and is provided with a feed pipe opening inclined from the upper left to the lower right.

[0008] Preferably, the discharge pipe comprises a discharge main pipe connected to the explosion-proof valve housing, and a discharge flange is arranged at the right end of the discharge main pipe.

[0009] Preferably, the locking mechanism is provided with one or two sets of

[0010] Preferably, the locking mechanism includes a locking spindle arranged in the explosion-proof valve housing and coaxially arranged with the fire-blocking plate spindle, and the locking spindle is fixedly provided with a vertically downward locking rod when the fire-blocking main board is closed, and a locking block is arranged on the outer side of the side wall of the explosion-proof valve housing below the locking rod.

[0011] Preferably, the locking spindle is provided with a counterweight block inclined toward the upper left.

[0012] Preferably, a high-strength magnet is provided on the limiting cross beam.

[0013] Preferably, the limiting crossbeam limits the maximum opening and closing angle of the fire-blocking main board to 30°.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The flap-type one-way explosion-proof valve suitable for metal dust provided by the utility model shortens the travel between the fire-blocking main board and the inlet pipe by using a limiting crossbeam, which can effectively isolate the high-speed flame and pressure wave generated by the metal dust explosion, prevent secondary and multiple explosions, and thus ensure the safety of personnel and equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the utility model;

[0017] Figure 2 This is a schematic diagram of the fire barrier closing;

[0018] Figure 3 Open the schematic for the firestop;

[0019] Figure 4 Schematic diagram for installing high-strength magnets;

[0020] In the figure: explosion-proof valve housing -1, explosion-proof valve base -11, explosion-proof valve upper cover -2, lifting ear -21, handle -22, feed pipe -3, feed flange -31, feed main pipe -32, feed pipe mouth -33, discharge pipe -4, discharge main pipe -41, discharge flange -42, fire arrester plate -5, fire arrester plate main shaft -51, fire arrester main board -52, reinforcing rod -53, limit beam -54, locking mechanism -6, locking main shaft -61, locking rod -62, locking block -63, counterweight block -64, high-strength magnet -65. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solution of the present utility model, the technical solution in the embodiments of the present utility model is clearly and completely described below in conjunction with the accompanying drawings and specific embodiments.

[0022] Please refer to Figure 1-4 , Figure 1 It is a schematic diagram of the utility model; Figure 2 This is a schematic diagram of the fire barrier closing; Figure 3 Open the schematic for the firestop; Figure 4 Schematic diagram for installing high-strength magnets.

[0023] The utility model provides a flap-type one-way explosion-proof valve suitable for metal dust, which is used for explosion-proof use when an explosion occurs in a closed metal dust environment; it comprises an explosion-proof valve shell 1 and a explosion-proof valve upper cover 2 is connected to the top of the explosion-proof valve shell by bolts, a feed pipe 3 is penetrated on the left side surface of the explosion-proof valve shell 1, and a discharge pipe 4 is arranged on the right side surface, a fire-blocking plate 5 is arranged inside the explosion-proof valve shell 1, and the shaft of the fire-blocking plate 5 is connected to a locking mechanism 6 arranged on the outside of the explosion-proof valve shell 1.

[0024] A flameproof valve base 11 is provided on the bottom surface of the flameproof valve housing 1 and fixed by welding; the flameproof valve base 11 can be a rectangular frame and welded as a whole on the bottom surface of the flameproof valve housing 1, can be four support blocks and can be respectively welded at the four corners of the bottom surface of the flameproof valve housing 1, or can be two long strip support beams and are respectively welded at the left and right sides of the bottom surface of the flameproof valve housing 1.

[0025] A lifting lug 21 is provided at each of the four corners of the top surface of the explosion-proof valve upper cover 2, so as to facilitate the lifting and use of the one-way explosion-proof valve as a whole; a handle 22 is provided in the middle of the top surface of the explosion-proof valve upper cover 2, so as to facilitate the disassembly of the explosion-proof valve upper cover 2.

[0026] The feed pipe 3 includes a feed flange 31 arranged at the left end, a feed main pipe 32 is arranged on the right side surface of the feed flange 31, and the right end of the feed main pipe 32 penetrates into the interior of the explosion-proof valve housing 1 and is provided with a feed pipe opening 33 inclined from the upper left to the lower right.

[0027] The discharge pipe 4 includes a discharge main pipe 41 connected to the explosion-proof valve housing 1 , and a discharge flange 42 is provided at the right end of the discharge main pipe 41 .

[0028] The fire-blocking plate 5 includes a fire-blocking plate main shaft 51 arranged above the feed main pipe 32 in the explosion-proof valve housing 1, and a fire-blocking plate main shaft 51 is provided with a fire-blocking main board 52 which can rotate around the main shaft, and the fire-blocking main board 52 can directly cover the feed pipe opening 33 when closed, and seal the feed pipe opening 33; the front and rear ends of the fire-blocking plate main shaft 51 respectively penetrate the front and rear side walls of the explosion-proof valve housing 1 and are connected to the side walls through bearings and bearing seats; one end or both ends of the fire-blocking plate main shaft 51 are connected to a locking mechanism 6 on the outside of the explosion-proof valve housing 1.

[0029] The locking mechanism 6 is used to lock the fire-blocking main board 52 to prevent it from opening again when the fire-blocking main board 52 is completely fitted with the feed pipe opening 33, and one group or two groups may be arranged on the outside of the explosion-proof valve housing 1; it includes a locking spindle 61 arranged on the explosion-proof valve housing 1 and coaxially arranged with the fire-blocking plate spindle 51, and the locking spindle 61 is fixedly provided with a vertically downward locking rod 62 when the fire-blocking main board 52 is closed, and a locking block 63 is arranged on the outside of the side wall of the explosion-proof valve housing 1 below the locking rod 62, and the fire-blocking plate 5 is locked and fixed by the coordinated action of the locking block 63 and the locking rod 62 to prevent it from opening again.

[0030] The locking spindle 61 is also provided with a counterweight block 64 inclined to the upper left, through which the weight of the fire-blocking main board 52 can be effectively offset, so that it can always be in an open state, and can be closed quickly when it needs to be closed due to the small resistance.

[0031] The use of the counterweight block 64 can also be eliminated, and a high-strength magnet 65 is provided on the limiting beam 54. The high-strength magnet 65 enables the fire-blocking main board 52 to be in an open state, and can be quickly closed when there is an explosion impact, thereby performing a one-way explosion-proof operation.

[0032] In addition, a reinforcing rod 53 is provided at the center of the right side surface of the fire-blocking main board 52 by means of bolts, and the fire-blocking main board 52 can be quickly closed with the assistance of the reinforcing rod 53; a limiting cross beam 54 is provided between the front and rear side walls of the explosion-proof valve housing 1 by means of bolts, and the reinforcing rod 53 will abut against the limiting cross beam 54 after the fire-blocking main board 52 is opened, and the maximum opening and closing angle of the fire-blocking main board 52 is limited to 30° by the limiting cross beam 54.

[0033] The flap-type one-way explosion-proof valve suitable for metal dust provided by the utility model shortens the travel between the fire-blocking main board and the inlet pipe by using a limiting crossbeam, which can effectively isolate the high-speed flame and pressure wave generated by the metal dust explosion, prevent secondary and multiple explosions, and thus ensure the safety of personnel and equipment.

[0034] Although the embodiments of the utility model have been shown and described, it is obvious that the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, it can be understood by ordinary technicians in this field that all other embodiments obtained by making various changes, modifications, substitutions and variations to these embodiments without departing from the principle and spirit of the utility model and without making creative work, all belong to the scope of protection of the utility model.

Claims

1. A flap-type one-way explosion-proof valve suitable for metal dust, characterized by: The invention comprises a flameproof valve housing (1) and a flameproof valve upper cover (2) connected to the top thereof by bolts, a feed pipe (3) penetrating the left side of the flameproof valve housing (1) and a discharge pipe (4) being arranged on the right side, a fire-blocking plate (5) being arranged inside the flameproof valve housing (1), and a shaft of the fire-blocking plate (5) being connected to a locking mechanism (6) arranged outside the flameproof valve housing (1); a flameproof valve base (11) being welded and fixed on the bottom surface of the flameproof valve housing (1); a lifting ear (21) being arranged at each of the four corners of the top surface of the flameproof valve upper cover (2), and a handle (22) being arranged in the middle of the top surface; the feed pipe (3) comprising a feed flange (31) at the left end and a feed main pipe (32) being arranged on the right side, the right end of the feed main pipe (32) extending into the flameproof valve housing (1) and being provided with a feed pipe opening (33) inclined from the upper left to the lower right; The fire-blocking plate (5) comprises a fire-blocking plate main shaft (51) arranged above the feed main pipe (32) in the flameproof valve housing (1); a fire-blocking main plate (52) which can rotate around the fire-blocking plate main shaft (51) is arranged on the fire-blocking plate main shaft (51), and the fire-blocking main plate (52) can close the feed pipe opening (33); the front and rear ends of the fire-blocking plate main shaft (51) respectively penetrate the front and rear side walls of the flameproof valve housing (1) and are connected to the side walls through bearings and bearing seats; one end or both ends of the fire-blocking plate main shaft (51) are connected to a locking mechanism (6) on the outside of the flameproof valve housing (1); a reinforcing rod (53) is arranged at the center of the right side surface of the fire-blocking main plate (52) by bolts; a limiting cross beam (54) is arranged between the front and rear side walls of the flameproof valve housing (1) by bolts, and the reinforcing rod (53) abuts against the limiting cross beam (54) after the fire-blocking main plate (52) is opened.

2. The flap-type one-way explosion-proof valve suitable for metal dust according to claim 1 is characterized in that: The flameproof valve base (11) can be a rectangular frame welded as a whole on the bottom surface of the flameproof valve housing (1), or four support blocks respectively at the four corners of the bottom surface of the flameproof valve housing (1), or two long strip support beams respectively welded at the left and right sides of the bottom surface of the flameproof valve housing (1).

3. The flap-type one-way explosion-proof valve suitable for metal dust according to claim 2 is characterized in that: The discharge pipe (4) comprises a discharge main pipe (41) connected to the explosion-proof valve housing (1), and a discharge flange (42) is arranged at the right end of the discharge main pipe (41).

4. The flap-type one-way explosion-proof valve suitable for metal dust according to claim 3 is characterized in that: The locking mechanism (6) is provided with one or two groups on the outside of the explosion-proof valve housing (1).

5. The flap-type one-way explosion-proof valve suitable for metal dust according to claim 4 is characterized in that: The locking mechanism (6) comprises a locking spindle (61) arranged on the flameproof valve housing (1) and coaxially arranged with the fire-blocking plate spindle (51); the locking spindle (61) is fixedly provided with a locking rod (62) pointing vertically downward when the flame-blocking main plate (52) is closed; and a locking block (63) is arranged on the outer side of the side wall of the flameproof valve housing (1) below the locking rod (62).

6. The flap-type one-way explosion-proof valve suitable for metal dust according to claim 5, characterized in that: The locking spindle (61) is provided with a counterweight block (64) inclined toward the upper left.

7. The flap-type one-way explosion-proof valve suitable for metal dust according to claim 6, characterized in that: A high-strength magnet (65) is arranged on the limiting crossbeam (54).

8. The flap-type one-way explosion-proof valve suitable for metal dust according to claim 6 or 7, characterized in that: The limiting crossbeam (54) limits the maximum opening and closing angle of the fire-blocking main board (52) to 30°.

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