Active spark trapping device and detection system

Abstract

The invention relates to an active spark trapping device and a detection system, and belongs to the technical field of dust explosion prevention, the active spark trapping device comprises a shell, a grating plate assembly is arranged in the shell, a pneumatic actuator connected with the grating plate assembly is installed outside the shell, and the pneumatic actuator is used for controlling opening and closing of the grating plate assembly; a guide-out bin is arranged on one open side of the shell; position sensors are arranged on the shell in the opening state and the closing state of the grating plate respectively. The spark detection system comprises a spark detector assembly, a control system, a rapid gate valve and the spark trapping device. Other additional booster water pumps or stable air sources and the like do not need to be matched, other more resources are not occupied, the cost is reduced, and the resources are saved. And meanwhile, when sparks appear in the pipeline, the pipeline can be closed actively, the sparks are led out, and the safety of industrial production is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of dust explosion prevention, and in particular relates to an active spark capture device and a detection system. Background Art

[0002] Dust explosion is a major factor affecting industrial production and personnel safety. Eliminating dust explosion hazards from the source is an important part of explosion prevention measures. Spark detection and spraying are currently one of the most widely used measures to eliminate sparks in pipelines. This measure uses water or inert gas as a fire extinguishing medium. When a spark is found, the medium is sprayed to the target location to extinguish the spark, thereby achieving the purpose of fire extinguishing and explosion prevention. However, due to the presence of fire extinguishing media, spark detection and spraying will affect or contaminate the medium in the pipeline after spraying in certain specific environments, causing the system to shut down or require production to be stopped for cleaning. In addition, spark detection and spraying must be used in conjunction with a booster pump or a stable air source, which will take up more resources.

[0003] Therefore, there is an urgent need for an active spark capture device with minimal impact on production to guide the sparks generated in pipelines during industrial production, thereby ensuring the safety of industrial production. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides an active spark arresting device and a detection system.

[0005] An active spark arrester comprises a shell, a grid plate assembly is arranged inside the shell, a pneumatic actuator connected to the grid plate assembly is installed outside the shell, and the pneumatic actuator is used to control the opening and closing of the grid plate assembly; an open side of the shell is provided with a guide bin; and position sensors are respectively arranged on the shell when the grid plate is in the open state and the closed state.

[0006] The motion range of the pneumatic actuator is 0 to 90 degrees.

[0007] The outlet of the export bin is of a gradually contracting type and the outlet diameter is slightly smaller than the pipe diameter.

[0008] The lower end of the shell is cut in the same direction as the outlet of the export bin.

[0009] The grid plate assembly comprises a grid plate, a shaft and a bearing. The centerline position on the shaft is slotted along the axial direction, and the grid plate is fixed at the slotted position. The shaft is connected to the housing through the bearing thereon.

[0010] Seals are provided at both ends of the bearing to prevent dust in the pipeline from entering the gap between the shaft and the housing.

[0011] The position sensor is capacitive or photoelectric.

[0012] A spark detection system comprises a spark detector assembly, a control system, a quick plug valve and the above-mentioned spark arrester. The spark detector assembly is connected to the control system and the pneumatic actuator of the spark arrester in sequence, and the actuator of the quick plug valve is connected to the outlet of the spark arrester.

[0013] The beneficial effects of the present invention are:

[0014] The present invention provides an active spark arresting device and a detection system, which is provided with a grid plate assembly and a position sensor corresponding to the open or closed state thereof, and can detect whether the grid plate is fully opened or closed to ensure safety.

[0015] The present invention is provided with an export bin, and a cutout is made on the lower end of the shell body in the same direction as the export bin outlet to ensure that when the grille plate is closed, the grille plate is completely flush with the cutout to avoid spark retention in the pipeline due to the generation of steps.

[0016] The present invention does not need to be matched with other additional booster water pumps or stable air sources, does not occupy other more resources, reduces costs, and saves resources.

[0017] The present invention can actively close the pipeline when sparks appear in the pipeline and guide the sparks outwards, thereby ensuring the safety of industrial production. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of an active spark arrester provided by the present invention;

[0019] Figure 2 A front view of the active spark arrester provided by the present invention;

[0020] Figure 3 is a schematic diagram of a shell portion in the present invention;

[0021] Figure 4 is a schematic diagram of a grid plate assembly in the present invention;

[0022] in,

[0023] 1-pneumatic actuator, 2-housing, 3-position sensor, 4-export chamber, 5-bearing end cover, 6-grid plate assembly, 7-quick plug valve, 8-bracket, 9-coupling, 61-grid plate, 62-shaft, 63-bearing, 64-seal. DETAILED DESCRIPTION

[0024] In order to better explain the present invention and facilitate understanding, the technical solutions and effects of the present invention are described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0025] Example 1

[0026] like Figure 1-4 As shown, this embodiment provides an active spark arrester, including a shell 2, a grid plate assembly 6 is arranged inside the shell 2, and a pneumatic actuator 1 is installed outside the shell 2. The pneumatic actuator 1 is installed on the shell 2 through a bracket 8. The motion range of the pneumatic actuator 1 is 0 to 90°, and the output shaft of the pneumatic actuator 1 is connected to the grid plate assembly 6 through a coupling 9.

[0027] Furthermore, the pneumatic actuator 1 and the bracket 8 are connected and fixed to the housing 2 by bolts.

[0028] The housing 2 is a four-way closed and two-way open housing 2, connected to the pipeline, and one of the open sides is provided with a guide bin 4. The guide bin 4 is connected to the housing 2 by bolts, and the outlet of the guide bin 4 is a tapered type and the outlet diameter is slightly smaller than the pipeline diameter.

[0029] The grid plate assembly 6 comprises a grid plate 61, a shaft 62, a seal 64 and a bearing 63. The centerline of the shaft 62 is slotted axially, and the grid plate 61 is fixed at the slotted position. The shaft 62 is connected to the housing 2 through the bearing 63 thereon, and a bearing end cover 5 is correspondingly provided on the outside of the housing 2. In order to prevent dust in the pipeline from entering the gap between the shaft 62 and the housing 2, the bearing 63 makes the assembly rotate more smoothly, and an annular sealing ring made of polytetrafluoroethylene and copper powder component material is provided at both ends of the bearing 63.

[0030] When the grid plate assembly 6 is in a closed state, the grid plate 61 is at 90 degrees to the pipeline axis; when the grid plate assembly 6 is in an open state, the grid plate 61 is parallel to the pipeline axis.

[0031] The lower end of the shell 2 is cut in the same direction as the outlet of the guide bin 4. The cut is used to ensure that when the grid plate 61 is closed, that is, the grid plate 61 is at 90 degrees to the pipeline axis, the grid plate 61 is completely flush with the cut to avoid spark retention due to the generation of steps.

[0032] Furthermore, the grid plate assembly 6 includes four parallel shafts 62. When the grid plate assembly 6 is in a closed state, the four grid plates 61 on the shafts 62 can just close the inside of the housing 2. When the grid plate assembly 6 is in an open state, the four grid plates 61 are parallel. In order to minimize the volume of the entire device, reduce costs and avoid interference, the four pneumatic actuators 1 are connected to both sides of the housing 2 to achieve corresponding connection with each shaft 62 in the grid plate assembly 6.

[0033] The housing 2 is provided with a position sensor 3, which can be a capacitive type or a photoelectric type, and is respectively provided in the open state of the grid plate 61, i.e., the grid plate 61 is at a position of 0° with the pipeline axis, and in the closed state, i.e., the grid plate 61 is at a position of 90° with the pipeline axis, for detecting whether the grid plate 61 is fully opened or closed. The open state of the grid plate 61, i.e., the grid plate 61 is at a position of 0° with the pipeline axis, is the initial state.

[0034] Example 2

[0035] This embodiment provides a spark detection system, including a spark detector assembly, a control system, a quick plug valve 7, and a spark arrester provided in Embodiment 1. The spark detector assembly includes a multi-mode full-view detector based on a photoelectric sensor with application number 202411314756.3, which is connected to the control system, the control system is connected to the pneumatic actuator 1 of the spark arrester, and the actuator of the quick plug valve 7 is connected to the outlet of the output bin 4 of the spark arrester.

[0036] When sparks appear in the pipeline, the multi-mode full-view detector based on photoelectric sensors detects the sparks and then sends a signal to the control system. After receiving the spark signal, the control system sends a signal to the spark capture device and the quick plug valve 7. The pneumatic actuator 1 of the capture device starts to move after receiving the signal, driving the grid plate assembly 6 to move, and the grid plate 61 closes and cuts off the pipeline. At the same time, the actuator, that is, the cylinder, of the quick plug valve 7 connected below the export bin 4 moves to open the plug plate. At this time, the medium in the pipeline is discharged from the outlet of the export bin 4 together with the sparks driven by the airflow, thereby completing the spark export. After the spark is exported, the grid plate 61 and the plug plate are reset, and the pipeline returns to normal working state.

Claims

1. An active spark arrester, characterized in that: It comprises a shell, a grille plate assembly is arranged inside the shell, a pneumatic actuator connected to the grille plate assembly is installed outside the shell, and the pneumatic actuator is used to control the opening and closing of the grille plate assembly; an open side of the shell is provided with a guide bin; and position sensors are respectively arranged on the shell when the grille plate is in the open state and the closed state.

2. An active spark arrester according to claim 1, characterized in that: The motion range of the pneumatic actuator is 0 to 90 degrees.

3. An active spark arrester according to claim 1, characterized in that: The outlet of the export bin is of a gradually contracting type and the outlet diameter is slightly smaller than the pipe diameter.

4. An active spark arrester according to claim 1, characterized in that: The lower end of the shell is cut in the same direction as the outlet of the export bin.

5. An active spark arrester according to claim 1, characterized in that: The grid plate assembly comprises a grid plate, a shaft and a bearing. The centerline position on the shaft is slotted along the axial direction, and the grid plate is fixed at the slotted position. The shaft is connected to the housing through the bearing thereon.

6. An active spark arrester according to claim 5, characterized in that: Seals are provided at both ends of the bearing to prevent dust in the pipeline from entering the gap between the shaft and the housing.

7. An active spark arrester according to claim 1, characterized in that: The position sensor is capacitive or photoelectric.

8. A spark detection system, characterized in that: It comprises a spark detector assembly, a control system, a quick plug valve and the spark arrester according to any one of claims 1 to 7, wherein the spark detector assembly is connected to the control system and the pneumatic actuator of the spark arrester in sequence, and the actuator of the quick plug valve is connected to the outlet of the export bin of the spark arrester.

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