Explosion-proof protection device for dust explosion

Abstract

The utility model discloses a dust explosion flame-proof protection device, which comprises a shell, a mounting groove, an elastic component, a buffer component, a baffle plate and a partition plate, during normal work, dust airflow can enter the shell from a first pipe end and then flow out from a second pipe end, and when explosion is generated, the speed of shock waves generated by detonation reaction is higher than the propagation speed of explosion flames, so that the explosion-proof protection device has a good explosion-proof effect. When explosion flames spread to the second pipe end, shock waves firstly act on the baffle to push the baffle to move towards the interior of the second pipe, then communication between the first pipe and the second pipe can be blocked, and the flame spreading path of the communication pipe is effectively cut off in time; the partition plate moves downwards under the action of the elastic component when not supported by the baffle, and then can make contact with the bottom of the mounting cavity, communication between the first pipeline and the second pipeline is further blocked, and the purpose of dust explosion disaster reduction control is achieved.

Description

Technical Field

[0001] The utility model relates to a protective device, in particular to a dust explosion flameproof protective device. Background Art

[0002] Dust explosions are a potential safety challenge for companies involved in combustible powders. In particular, when an explosion occurs, the flames spread through the transport pipeline to the connected production processes and equipment. The dust explosion will be subject to changes in constraints, which will increase its explosive destructiveness and bring relatively unacceptable economic losses to the explosion-related companies. From the perspective of explosion disaster reduction, it is realistic and feasible to effectively limit the explosion to a limited controllable range in the early stages of the explosion. However, in recent years, dust explosion disasters with greater destructive power still occur from time to time, mainly because of the lack of the ability to limit the explosion to a limited controllable range in the first place. Therefore, it is necessary to design a dust explosion flameproof protection device to solve this problem. Utility Model Content

[0003] The utility model aims to provide a dust explosion flameproof protection device to solve the problems raised in the above background technology.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A dust explosion flameproof protection device comprises a shell, a mounting cavity is arranged in the shell, a first pipe and a second pipe are arranged on both sides of the shell, the first pipe and the second pipe are both connected to the mounting cavity, the pipe diameter of the first pipe is larger than the pipe diameter of the second pipe, and a baffle is arranged in the mounting cavity;

[0006] An installation groove is provided on the shell, a partition is provided in the installation groove, and the partition is provided on one side of the baffle;

[0007] An elastic component, one end of the elastic component is connected to the shell, and the other end is connected to the partition;

[0008] The buffer component is arranged in the second pipeline and connected to the baffle.

[0009] As a further solution of the utility model: the buffer assembly includes a slide groove, and the slide groove is opened on the inner wall of the second pipe;

[0010] A slider is slidably installed in the slide groove;

[0011] A buffer rod, one end of which is connected to the baffle plate, and the other end of which is connected to the slider;

[0012] The elastic unit has one end connected to the side wall of the slide groove and the other end connected to the slide block.

[0013] As a further solution of the utility model: it also includes a clamping block, which is in sliding contact with the inner wall of the second pipe;

[0014] A connecting rod, one end of which is hingedly connected to the slider, and the other end of which is hingedly connected to the clamping block.

[0015] As a further solution of the utility model: the elastic component is a spring.

[0016] As a further solution of the utility model: the slide grooves are provided in three groups.

[0017] Compared with the prior art, the utility model has the following beneficial effects: during normal operation, the dust airflow can enter the shell from the first pipe end and then flow out from the second pipe end. When an explosion occurs, the speed of the shock wave generated by the detonation reaction is faster than the propagation speed of the explosion flame. Before the explosion flame spreads to the second pipe end, the shock wave first acts on the baffle, pushing the baffle to move into the second pipe. The generated shock wave generates an impact force on the baffle, causing the baffle to move into the inner cavity of the second pipe. During this process, the slider will squeeze the elastic component to generate elastic force, and the generated elastic force will play a buffering role on the baffle. The baffle entering the second pipe can block the connection between the first pipe and the second pipe, and the flame propagation path of the connecting pipe is cut off in a timely and effective manner. At the same time, when the baffle is out of contact with the partition, the partition moves downward under the action of the elastic component when there is no baffle support, and then can contact the bottom of the installation cavity, further blocking the connection between the first pipe and the second pipe, thereby achieving the purpose of dust explosion disaster reduction control. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The figure is a schematic diagram of the structure of a dust explosion flameproof protection device.

[0019] Figure 2 This is a schematic diagram of the structure of the second pipeline.

[0020] Figure 3 It is a cross-sectional view of a dust explosion flameproof protection device.

[0021] In the figure: 1, shell; 2, second pipe; 3, first pipe; 4, partition; 5, elastic component; 6, baffle; 7, buffer rod; 8, slider; 9, elastic unit; 10, slide groove; 11, mounting groove; 12, connecting rod; 13, block. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figures 1 to 3 As an embodiment of the utility model, a dust explosion flameproof protection device includes a shell 1, a mounting cavity is provided in the shell 1, a first pipe 3 and a second pipe 2 are installed on both sides of the shell 1, the first pipe 3 and the second pipe 3 are both connected to the mounting cavity, the diameter of the first pipe 3 is larger than the diameter of the second pipe 2, and a baffle 6 is provided in the mounting cavity;

[0024] The housing 1 is provided with a mounting groove 11, in which a partition plate 4 is arranged, and the partition plate 4 is arranged on one side of the baffle plate 6;

[0025] An elastic component 5, one end of the elastic component 5 is connected to the housing 1, and the other end is connected to the partition 4;

[0026] The buffer component is arranged in the second pipeline 2 and connected to the baffle 6.

[0027] In this embodiment, a first pipe 3 and a second pipe 2 are installed on both sides of the shell 1. The first pipe 3 and the first pipe 3 are both connected to the installation cavity. The diameter of the first pipe 3 is larger than the diameter of the second pipe 2. The size of the baffle 6 is the same as the inner diameter of the second pipe 2. During normal operation, the dust airflow can enter the shell 1 from the first pipe end and then flow out from the second pipe end. When an explosion occurs, the speed of the shock wave generated by the detonation reaction is faster than the propagation speed of the explosion flame. Before the explosion flame spreads to the second pipe end, the shock wave first acts on the baffle 6, pushing the baffle 6 to move into the second pipe 2, thereby blocking the connection between the first pipe 3 and the second pipe 2. By timely and effectively cutting off the path for the flame propagation of the connecting pipe, the buffer component provided plays a buffering role on the baffle 6 in this process. At the same time, when the baffle 6 is out of contact with the partition 4, the partition 4 moves downward under the action of the elastic component 5 when there is no support from the baffle 6, and then can contact the bottom of the installation cavity, further blocking the connection between the first pipe 3 and the second pipe 2, and achieving the purpose of dust explosion disaster reduction control.

[0028] As an embodiment of the utility model, the buffer assembly includes a slide groove 10, and the slide groove 10 is opened on the inner wall of the second pipe 2;

[0029] A slider 8 is slidably mounted in the slide groove 10;

[0030] A buffer rod 7, one end of the buffer rod 7 is connected to the baffle 6, and the other end is connected to the slider 8;

[0031] The elastic unit 9 has one end connected to the side wall of the slide slot 10 and the other end connected to the slide block 8 .

[0032] In this embodiment, a slide groove 10 is opened on the inner wall of the second pipe 2, and a slider 8 is slidably installed in the slide groove 10. One end of the buffer rod 7 is connected to the baffle 6, and the other end is connected to the slider 8. One end of the elastic unit 9 is connected to the side wall of the slide groove 10, and the other end is connected to the slider 8. When the detonation occurs, high-temperature and high-pressure detonation products will be instantly generated. The speed of the shock wave generated by the detonation reaction is faster than the propagation speed of the explosion flame. The generated shock wave generates an impact force on the baffle 6, causing the baffle 6 to move into the inner cavity of the second pipe 2. During this process, the slider 8 will squeeze the elastic component 5 to generate elastic force, and the generated elastic force will have a buffering effect on the baffle 6.

[0033] Furthermore, the elastic unit 9 may be a spring or an elastic film, etc., which will not be described in detail here.

[0034] As an embodiment of the utility model, it also includes a clamping block 13, and the clamping block 13 is in sliding contact with the inner wall of the second pipe 2;

[0035] A connecting rod 12 , one end of which is hingedly connected to the slider 8 , and the other end of which is hingedly connected to the clamping block 13 .

[0036] In this embodiment, the speed of the shock wave is faster than the propagation speed of the explosion flame. When the shock wave impacts the baffle 6, the baffle 6 moves toward the side close to the second pipe 2 under the action of the impact force, so that the baffle 6 moves into the second pipe 2. The baffle 6 pushes the slider 8 at one end of the buffer rod 7 to slide and drives the block 13 at one end of the connecting rod 12 to slide. When the block 13 slides to the outside of the second pipe 2, it will move downward under the action of gravity, and then when the elastic unit 9 drives the block 13 to reset, the block 13 will be engaged with the outer wall of the second pipe 2, thereby limiting the reset of the baffle 6, so that the baffle 6 stays in the second pipe 2, and then the connection between the first pipe 3 and the second pipe 2 can be blocked, and the purpose of dust explosion disaster reduction and control is achieved by timely and effectively cutting off the path of flame propagation in the connecting pipes.

[0037] As an embodiment of the present utility model, the elastic component 5 is a spring.

[0038] In this embodiment, the elastic component 5 is a spring. When the shock wave generated by the explosion reaction impacts the baffle 6, the spring can be compressed to further buffer the impact force of the shock wave.

[0039] As an embodiment of the present utility model, three groups of slide grooves 10 are provided.

[0040] In this embodiment, three groups of slide grooves 10 are provided. By providing three groups of slide grooves 10, when the shock wave generated by the explosion reaction impacts the baffle 6, a buffering effect can be played on the baffle 6, thereby improving the practicality of the device.

[0041] The working principle of the utility model is as follows: during normal operation, the dust airflow can enter the shell 1 from the first pipe end and then flow out from the second pipe end. When an explosion occurs, the speed of the shock wave generated by the explosion reaction is faster than the propagation speed of the explosion flame. Before the explosion flame spreads to the second pipe end, the shock wave first acts on the baffle 6 to push the baffle 6 to move into the second pipe 2. The generated shock wave generates an impact force on the baffle 6, causing the baffle 6 to move into the inner cavity of the second pipe 2. During this process, the slider 8 squeezes the elastic component 5 to generate an elastic force, which plays a buffering role on the baffle 6. The baffle 6 enters the second pipe 2 to block the connection between the first pipe 3 and the second pipe 2, and the path of flame propagation in the connecting pipe is cut off in time and effectively. At the same time, when the baffle 6 is out of contact with the partition 4, the partition 4 moves downward under the action of the elastic component 5 when there is no support from the baffle 6, and then can contact the bottom of the installation cavity, further blocking the connection between the first pipe 3 and the second pipe 2, thereby achieving the purpose of dust explosion disaster reduction control.

[0042] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0043] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A dust explosion flameproof protection device, comprising a housing, characterized in that: The shell is provided with an installation cavity, a first pipe and a second pipe are installed on both sides of the shell, the first pipe and the second pipe are both connected to the installation cavity, the diameter of the first pipe is larger than the diameter of the second pipe, and a baffle is provided in the installation cavity; An installation groove is provided on the shell, a partition is provided in the installation groove, and the partition is provided on one side of the baffle; An elastic component, one end of the elastic component is connected to the shell, and the other end is connected to the partition; The buffer component is arranged in the second pipeline and connected to the baffle.

2. A dust explosion flameproof protection device according to claim 1, characterized in that: The buffer assembly includes a slide groove, and the slide groove is provided on the inner wall of the second pipe; A slider is slidably installed in the slide groove; A buffer rod, one end of which is connected to the baffle plate, and the other end of which is connected to the slider; The elastic unit has one end connected to the side wall of the slide groove and the other end connected to the slide block.

3. A dust explosion flameproof protection device according to claim 2, characterized in that: It also includes a clamping block, which is in sliding contact with the inner wall of the second pipe; A connecting rod, one end of which is hingedly connected to the slider, and the other end of which is hingedly connected to the clamping block.

4. The dust explosion flameproof protection device according to claim 2, characterized in that: The elastic component is a spring.

5. The dust explosion flameproof protection device according to claim 2, characterized in that: The slide grooves are provided in three groups.

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