Explosion-proof pressure relief device of centrifugal casting machine

Abstract

The utility model discloses an anti-explosion pressure relief device of a centrifugal casting machine, which belongs to the field of safety protection of casting machinery and comprises a closed space arranged underground, the centrifugal casting machine is arranged in the closed space, a centrifugal machine protection cover plate is arranged above the closed space, and a plurality of anti-explosion holes are formed in the side wall of the closed space. An L-shaped pressure relief pipe is connected to the explosion-proof hole, an outlet of the L-shaped pressure relief pipe leads to the ground, a left movable cover plate and a right movable cover plate which are symmetrical and have the same specification are arranged at the outlet, the movable cover plate comprises a bottom fixing block arranged at the outlet, a sliding guide groove is formed in the bottom fixing block, and one end of the long beam is arranged in the sliding guide groove; the movable cover plate can slide in the sliding guide groove, the other end of the long beam is hinged to the top fixing block, a cover plate body is arranged on the outer side of the top fixing block, and a fence is arranged on the periphery of the movable cover plate. According to the utility model, the rapidly expanded gas in the space of the centrifugal machine can be rapidly decompressed, gas explosion is prevented, and equipment or personal safety accidents are avoided.

Description

Technical Field

[0001] The utility model relates to the field of safety protection of foundry machinery, in particular to an explosion-proof pressure relief device for a centrifugal casting machine. Background Art

[0002] Centrifugal casting machines are widely used in the metallurgical casting industry. Most centrifugal casting machines are installed in an underground enclosed space. The centrifugal casting machine drives the cold mold to rotate at a high speed. Once a molten iron explosion accident occurs in the cold mold during the production process of the centrifugal casting machine, a large amount of high-temperature molten iron flows from the cold mold into the enclosed space where the centrifuge works, which will quickly heat and expand the air in the working space, and in severe cases, a gas explosion will occur, causing equipment and personal safety accidents.

[0003] To avoid accidents, once a molten iron runaway accident occurs during the production process of the centrifuge, a measure or a device must be taken to quickly relieve the pressure of the rapidly expanding gas in the centrifuge space, prevent gas explosion, and avoid equipment or personal safety accidents. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide an explosion-proof pressure relief device for a centrifugal casting machine, aiming to solve the safety accidents caused by the high temperature and high pressure generated by the molten iron runaway accident during the production process of the centrifugal casting machine, so as to prevent explosion and relieve pressure in time.

[0005] To solve the above technical problem, the technical solution adopted by the utility model is: an explosion-proof pressure relief device for a centrifugal casting machine, including an underground enclosed space, a centrifugal casting machine is arranged in the enclosed space, a centrifuge protection cover plate is arranged above the enclosed space, several explosion-proof openings are arranged on the side wall of the enclosed space, an L-shaped pressure relief pipe is connected at the explosion-proof openings, the outlet of the L-shaped pressure relief pipe leads to the ground, and two symmetrical movable cover plates with the same specifications are arranged at the outlet. The movable cover plate includes a bottom fixing block arranged at the outlet, a sliding guide groove is arranged in the bottom fixing block, one end of a long beam is arranged in the sliding guide groove and can slide in the sliding guide groove, the other end of the long beam is hinged to the top fixing block, and a cover plate body is arranged outside the top fixing block

[0006] A fence is arranged around the movable cover plate.

[0007] A further improvement of the technical solution of the utility model lies in that: the bottom surface of the L-shaped pressure relief pipe is an inclined surface that rises from the inside to the outside for easy pressure relief, and the outlet of the L-shaped pressure relief pipe is flush with the ground.

[0008] A further improvement of the technical solution of the present utility model lies in that: one end of a short beam is also hinged to the top fixing block, a transition beam is arranged between the top fixing block and the bottom fixing block, and the connection method is that the tail end of the transition beam is hinged to the bottom fixing block, the head end of the transition beam is hinged to the other end of the short beam, and the middle part of the transition beam is hinged to the middle part of the long beam.

[0009] A further improvement of the technical solution of the present utility model lies in that: an anti-corrosion coating is provided on the outer surface of the cover plate body.

[0010] A further improvement of the technical solution of the present utility model lies in that: a waterproof sealing strip is wrapped around the side of the cover plate body.

[0011] Due to the adoption of the above technical solution, the technical progress achieved by the present utility model is as follows: by opening a number of holes directly leading to the ground on the side wall of the enclosed space, in cooperation with the pressure relief pipe, and at the same time, the bottom of the pressure relief pipe is set as an inclined surface rising from the inside to the outside, it can enable the centrifugal machine to quickly heat, expand, and boost the gas in the centrifugal machine space after a fire accident occurs in the cold die during the production process. When the pressure reaches a certain level, the expanded gas can be discharged from the holes of the pressure relief pipe to prevent explosion accidents. By providing a movable cover plate at the holes of the pressure relief pipe, and in cooperation with structures such as fixing blocks, guide grooves, and beams, a one-way conduction that opens from the inside to the outside can be realized. It can not only ensure that when the internal gas expands, the cover plate can be quickly pushed open from the inside to the outside to complete pressure relief, but also ensure a completely closed state from the outside to the inside usually, preventing the fall of people or objects and causing accidents. By providing a transition beam structure on the cover plate, it can not only make the opening and closing more smooth and realize functions such as limiting, but also share stress, extending the service life of the cover plate. Description of the Drawings

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings;

[0013] Figure 1 It is a structural schematic diagram of the explosion-proof pressure relief device of the present utility model;

[0014] Figure 2 It is a top view of the explosion-proof pressure relief device of the present utility model;

[0015] Figure 3 It is a structural schematic diagram of the movable cover plate;

[0016] Among them, 1. Centrifugal casting machine, 2. Centrifuge protective cover plate, 3. Side wall of the confined space, 4. Explosion-proof opening, 5. L-shaped pressure relief pipe, 6. Movable cover plate, 61. Bottom fixing block, 62. Sliding guide groove, 63. Cover plate body, 64. Transition beam, 65. Long beam, 66. Top fixing block, 67. Short beam, 7. Fence. Detailed implementation manners

[0017] The following further elaborates on the present utility model in conjunction with embodiments:

[0018] Embodiment 1

[0019] As Figure 1 shown, it is a structural schematic diagram of a device for explosion-proof pressure relief of a centrifugal casting machine, including a confined space arranged underground. A centrifugal casting machine 1 is arranged in the confined space. In this embodiment, the centrifugal casting machine 1 is specifically a 4000-disc centrifuge, with a maximum load of 70t and a casting iron water volume between 15 - 20t. A centrifuge protective cover plate 2 is arranged above the confined space. When the centrifugal casting machine 1 is started, the centrifuge protective cover plate 2 closes to achieve the confinement of the underground space. A number of explosion-proof openings 4 are opened on the side wall 3 of one side of the confined space. As Figure 2 shown, in this embodiment, the specific number of the explosion-proof openings 4 is 3. An L-shaped pressure relief pipe 5 is connected to each explosion-proof opening 4. The outlet of the L-shaped pressure relief pipe 5 leads to the ground and is flush with the ground. When an accident of molten iron explosion occurs in the cold mold in the confined space and a large amount of molten iron quickly overflows, the gas in the centrifuge space will expand rapidly, generating high-temperature and high-pressure gas. The expanded high-pressure gas can enter the L-shaped pressure relief pipe 5 through the explosion-proof opening 4 and be discharged from the ground opening to complete the explosion-proof pressure relief in the underground confined space. The bottom surface of the L-shaped pressure relief pipe 5 is an inclined surface that rises from the inside to the outside for facilitating pressure relief. Symmetric movable cover plates 6 of the same specification are arranged at the outlet of the L-shaped pressure relief pipe 5. Specifically, as Figure 3As shown in the figure, the movable cover plate 6 is a one-way conduction structure that opens from the inside to the outside, including a bottom fixing block 61 provided at the outlet. A sliding guide groove 62 is provided in the bottom fixing block 61. One end of the long beam 65 is arranged in the sliding guide groove 62 and can slide in the sliding guide groove 62. The other end of the long beam 65 is hinged to the top fixing block 66. A cover plate body 63 is arranged outside the top fixing block 66. One end of a short beam 67 is also hinged to the top fixing block 66. A transition beam 64 is arranged between the top fixing block 66 and the bottom fixing block 61. The connection method is that the tail end of the transition beam 64 is hinged to the bottom fixing block 61, the head end of the transition beam 64 is hinged to the other end of the short beam 67, and the middle part of the transition beam 64 is hinged to the middle part of the long beam 65. An anti-corrosion coating is provided on the outer surface of the cover plate body 63. A waterproof sealing strip is wrapped around the side of the cover plate body 63. By this means, when the two movable cover plates are completely closed usually, they can completely block the outlet of the L-shaped pressure relief pipe 5 to prevent water ingress and falling. Only when there is an accident in the closed space and the high-pressure gas expands, the movable cover plate 6 will be pushed open from the inside to the outside by the expanding gas for pressure relief, preventing gas explosion and avoiding equipment or personal safety accidents. A fence 7 is arranged around the movable cover plate 6 to play a warning role.

[0020] The utility model can be widely applied to casting equipment working in a closed space to prevent gas explosion accidents caused by the overflow of molten iron due to equipment or die failures.

[0021] The above-described embodiments are only used to describe the preferred embodiments of the utility model, and do not limit the scope of the utility model. Without departing from the design spirit of the utility model, various deformations and improvements made by those of ordinary skill in the art to the technical solution of the utility model shall fall within the protection scope determined by the claims of the utility model.

Claims

1. An explosion-proof pressure relief device for a centrifugal casting machine, comprising a sealed space arranged underground, a centrifugal casting machine (1) is arranged in the sealed space, and a centrifuge protection cover plate (2) is arranged above the sealed space, and is characterized in that: There are several explosion-proof openings (4) provided on the side wall (3) of the confined space. An L-shaped pressure relief pipe (5) is connected at the explosion-proof opening (4). The outlet of the L-shaped pressure relief pipe (5) leads to the ground, and there are two symmetric movable covers (6) of the same specification at the outlet. The movable cover (6) includes a bottom fixing block (61) provided at the outlet. A sliding guide groove (62) is provided in the bottom fixing block (61). One end of a long beam (65) is arranged in the sliding guide groove (62) and can slide in the sliding guide groove (62). The other end of the long beam (65) is hinged to a top fixing block (66). A cover plate body (63) is arranged outside the top fixing block (66). A fence (7) is arranged around the movable cover (6).

2. The explosion-proof pressure relief device of a centrifugal casting machine according to claim 1, characterized in that: The bottom surface of the L-shaped pressure relief pipe (5) is an inclined surface that rises from the inside to the outside for facilitating pressure relief. The outlet of the L-shaped pressure relief pipe (5) is flush with the ground.

3. The explosion-proof pressure relief device of a centrifugal casting machine according to claim 1, characterized in that: One end of a short beam (67) is also hinged to the top fixing block (66). A transition beam (64) is arranged between the top fixing block (66) and the bottom fixing block (61). The connection method is that the tail end of the transition beam (64) is hinged to the bottom fixing block (61), the head end of the transition beam (64) is hinged to the other end of the short beam (67), and the middle part of the transition beam (64) is hinged to the middle part of the long beam (65).

4. An explosion-proof pressure relief device for a centrifugal casting machine according to claim 1, characterized in that: An anti-corrosion coating is provided on the outer surface of the cover plate body (63).

5. The explosion-proof pressure relief device of a centrifugal casting machine according to claim 4, characterized in that: A waterproof sealing strip is wrapped around the side of the cover plate body (63).

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