A reciprocating self-cleaning detection device for underground contaminated gas in iron ore mining

Abstract

The application discloses a kind of iron ore mining underground pollution gas reciprocating self-cleaning detection device, it is related to pollution gas detection technical field, it includes detection shell, detection shell both ends are equipped with filter screen, and the inside sliding installation movable plate separates it into two independent cavities;Movable plate is fixed with cavity plate, cavity plate is equipped with gas detection head, and gas head is respectively inserted into two cavities with control valve on the both sides of cavity plate;The driving assembly in detection shell drives movable plate reciprocating motion.This device realizes unilateral suction detection, unilateral exhaust self-cleaning alternate work by movable plate reciprocating motion, solves the problem that filter screen of traditional device is easy to block, guarantees detection precision, without manual frequent cleaning, adapt to underground harsh environment, improve detection reliability and operation safety.

Description

Technical Field

[0001] This invention relates to the field of pollutant gas detection technology, specifically to a reciprocating self-cleaning detection device for pollutant gases in iron ore mining underground. Background Technology

[0002] In the underground working environment of iron ore mining, various polluting gases such as carbon monoxide and hydrogen sulfide are generated. Excessive concentrations of these gases can seriously threaten the lives of workers. Therefore, pollutant gas detection is one of the core aspects of ensuring underground mining safety. The underground environment also contains a large amount of solid particulate matter such as coal dust and rock dust. If these particles enter the detection device along with the polluting gases, they will adhere to the surface of the gas detection elements, leading to decreased detection accuracy, shortened element lifespan, and even equipment malfunction. Therefore, pollutant gas filtration is an indispensable and crucial component of underground gas detection devices.

[0003] Existing underground contaminated gas detection devices typically use filters at the gas inlet to remove dust. However, this method has significant technical drawbacks in practical applications. Due to the high dust concentration and intense vibrations in iron ore mines, dust accumulates rapidly on the filter surface, causing blockage within a short time. Blockage prevents contaminated gas from flowing smoothly into the detection chamber, resulting in delayed and distorted data that fails to accurately reflect the actual gas concentration underground. Furthermore, impaired gas flow can trigger false alarms or missed alarms, posing serious safety hazards to underground operations.

[0004] Furthermore, cleaning the filters in existing devices requires manual disassembly, which is cumbersome and risky in the confined and harsh underground working environment. Frequent disassembly can also damage the device's sealing and explosion-proof performance. If not cleaned in time, the filters must be replaced, significantly increasing equipment maintenance costs and downtime, and affecting the continuity of mining operations. Therefore, solving the problem of easy clogging and difficult cleaning and maintenance of filters in the polluted gas filtration stage of existing detection devices has become a key technical challenge for improving the reliability of polluted gas detection in iron ore mines and ensuring operational safety. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a reciprocating self-cleaning detection device for polluted gases in iron ore mining underground.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a reciprocating self-cleaning detection device for polluted gas in iron ore mining, comprising a detection shell, with filter screens fixedly installed at both ends along the length of the detection shell, and a movable plate slidably installed inside the detection shell, which divides the interior of the detection shell into two independent cavities, with a cavity plate fixedly installed on the movable plate, and a gas detection head fixedly installed in the internal cavity of the cavity plate, with gas heads fixedly installed on both sides of the cavity plate, the two gas heads located in the two cavities respectively, and a control valve fixedly installed on each gas head; The detection housing is equipped with a drive assembly, which enables the movable plate to reciprocate along the length of the detection housing.

[0007] Preferably, the drive assembly includes a threaded rod and a small motor; the small motor is fixedly installed inside the detection housing, and the threaded rod is rotatably installed inside the detection housing, with one end of the threaded rod penetrating the interior of the movable plate and threadedly connected to the movable plate.

[0008] Preferably, the detection housing includes a detection cylinder and suction heads disposed at both ends of the detection cylinder, and the filter screen is fixedly installed inside the suction head.

[0009] Preferably, each of the suction heads is fixedly connected to the detection cylinder via an extension hose.

[0010] Preferably, the extension hose is made of a corrosion-resistant and tensile-resistant flexible material.

[0011] Preferably, a slide rod is fixedly installed inside the detection housing, one end of which passes through the interior of the movable plate and is slidably connected to the movable plate.

[0012] Compared with the prior art, the present invention provides a reciprocating self-cleaning detection device for polluted gases in iron ore mining, which has the following beneficial effects: 1. This device uses a drive assembly to move a movable plate in a reciprocating motion, causing two independent chambers to alternately create positive and negative pressure. The reverse airflow generated during exhaust directly impacts the filter screen inside the suction head, causing dust to fall off automatically. No manual disassembly and cleaning is required, avoiding problems such as poor gas flow and distorted data caused by filter clogging in traditional devices. It also reduces the frequency of manual maintenance and safety risks, ensuring consistently accurate data and providing reliable data support for safe underground operations.

[0013] 2. The device achieves a flexible connection between the suction head and the detection cylinder through an extension hose, allowing the two suction heads to be flexibly deployed in different detection areas downhole, enabling simultaneous or alternating detection of contaminated gases at multiple points. Compared to traditional fixed-point detection devices, it eliminates the need to configure complete detection equipment separately in multiple areas, significantly reducing the number of gas detection heads required, lowering equipment procurement and maintenance costs, and simultaneously enhancing the comprehensive perception capability of contaminated gas distribution in complex downhole spaces.

[0014] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it according to the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Specific embodiments of the present invention are given in detail below with reference to the accompanying drawings. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a cross-sectional structural diagram of the present invention.

[0016] In the diagram: 1. Detection cylinder; 2. Suction head; 3. Filter screen; 4. Extension hose; 5. Threaded rod; 6. Movable plate; 7. Chamber plate; 8. Gas detection head; 9. Gas head; 10. Fixed plate; 11. Small motor; 12. Slide rod. Detailed Implementation

[0017] The following is in conjunction with the appendix Figure 1 and Figure 2 The principles and features of the present invention are described below. The examples given are for illustrative purposes only and are not intended to limit the scope of the invention. The invention is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the invention.

[0018] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0020] Please combine Figure 1 and Figure 2 As shown, this embodiment discloses a reciprocating self-cleaning detection device for polluted gases in iron ore mines, which aims to solve the technical problems of existing iron ore mine polluted gas detection devices being easily affected by dust and having poor detection continuity. Its core is to achieve an integrated "detection-self-cleaning" function through a reciprocating moving plate in coordination with related components. The specific implementation details are disclosed in detail below in sequence with reference to the structure defined in the claims.

[0021] The supporting foundation of this device is the detection shell, which serves as the mounting carrier for the various internal functional components and also creates a closed space for gas circulation, making it suitable for the harsh working environment of high dust and high humidity in iron mines. The detection shell specifically consists of a detection cylinder 1 and two suction heads 2, which together form the gas inlet and outlet channels and the protective structure for the internal components. A fixing plate 10 is fixedly installed inside the detection cylinder 1, and the fixing plate 10 has through holes.

[0022] Each suction head 2 is fixedly connected to the detection cylinder 1 via an extension hose 4. The extension hose is flexible and bendable, allowing the two suction heads 2 to be detached from the fixed position of the detection cylinder 1 and flexibly arranged in different detection areas downhole to achieve multi-point collection of polluted gas. At the same time, the connection between the extension hose and the suction head 2 and the detection cylinder 1 adopts a sealed structure design to avoid gas leakage that could lead to data distortion.

[0023] Filter screens 3 are fixedly installed at both ends of the detection housing along its length. Specifically, the filter screens 3 are fixedly installed inside the suction head 2, near the gas inlet and outlet sides of the suction head 2. They are used to intercept and filter dust (coal dust, rock dust, etc.) in the polluted gas before it enters the detection housing, preventing dust from entering subsequent chambers and detection components, thus ensuring detection accuracy. The filter screens are fixedly connected to the inner wall of the suction head 2 to ensure that they will not shift or fall off under underground vibration conditions.

[0024] Inside the detection housing, a movable plate 6 is slidably installed. The shape of the movable plate 6 is adapted to the cross-sectional shape of the internal cavity of the detection housing, and the edge of the movable plate 6 is tightly fitted with the inner wall of the detection housing to form a sealed fit. Through this sliding sealing structure, the movable plate 6 divides the interior of the detection housing into two independent and non-communicating cavities, providing a structural basis for the subsequent alternating working mode of "single-sided air intake detection and single-sided exhaust dust removal".

[0025] To ensure the stability of the sliding of the movable plate 6, a slide rod 12 is fixedly installed inside the detection housing. The length direction of the slide rod 12 is consistent with the length direction of the detection housing, and one end of the slide rod 12 passes through the interior of the movable plate 6. The movable plate 6 and the slide rod 12 are in a sliding fit relationship. The slide rod 12 can prevent the movable plate 6 from deflecting or getting stuck during the sliding process, ensuring that the sealing performance of the two independent cavities is not affected.

[0026] A cavity plate 7 is fixedly installed on the movable plate 6. The cavity plate 7 is a hollow cavity structure, and its fixing method can be bolted or welded to ensure synchronous movement with the movable plate 6. The internal cavity of the cavity plate 7 is a detection cavity, specifically used to fix and install the gas detection head 8. The gas detection head 8 is fixedly connected to the inner wall of the cavity plate 7, and its detection sensing end faces the internal cavity of the cavity plate 7, used to sense the composition and concentration of pollutant gas entering the cavity. The signal output end of the gas detection head 8 extends to the outside of the detection housing through a wire to establish a signal connection with the downhole monitoring system, realizing real-time transmission of detection data.

[0027] On both sides of the cavity plate 7, two air heads 9 are fixedly installed. The two air heads 9 extend into the two independent cavities formed by the movable plate 6, and the internal channels of the air heads 9 are connected to the internal cavities of the cavity plate 7, forming a gas flow path of "cavity-air head-cavity plate detection cavity". Each air head 9 is fixedly equipped with a control valve, which is an electromagnetic control valve with automatic on / off function. Its control signal is linked with the control logic of the subsequent drive components to realize the alternating switching of gas flow between the two cavities and avoid gas mixing between the two cavities from interfering with the detection results.

[0028] To enable the reciprocating motion of the movable plate 6 along the length of the detection housing, a drive assembly is installed inside the detection housing. The drive assembly specifically includes a threaded rod 5 and a small motor 11. The small motor 11 is fixedly mounted on the fixed plate 10, serving as the power output source. The threaded rod 5 is rotatably mounted inside the detection housing, with its length aligned with the length of the detection housing. One end of the threaded rod 5 is connected to the output shaft of the small motor 11, which drives its forward and reverse rotation. The other end of the threaded rod 5 penetrates the interior of the movable plate 6, and the movable plate 6 and the threaded rod 5 are connected by a threaded connection.

[0029] When the small motor 11 drives the threaded rod 5 to rotate forward, the movable plate 6 slides to one side along the length of the detection housing through the threaded transmission; when the small motor 11 drives the threaded rod 5 to rotate in reverse, the movable plate 6 slides in the opposite direction. Combined with the guiding action of the slide rod 12, this achieves stable reciprocating motion of the movable plate 6. The small motor 11 is an explosion-proof motor, suitable for the safety requirements of flammable and explosive environments underground.

[0030] After the device is installed, the positions of the two suction heads 2 are adjusted using the extension hose 4 so that they are aligned with different contaminated gas detection areas downhole. Upon starting the device, the small motor 11 initializes, driving the threaded rod 5 to rotate, positioning the movable plate 6 in the initial middle position of the detection housing. At this time, the control valves on both gas heads 9 are closed. Subsequently, the gas detection head 8 preheats and enters the detection standby state, and the drive assembly prepares to execute the reciprocating motion program.

[0031] After receiving the detection command, the drive assembly activates the small motor 11, which rotates forward, driving the threaded rod 5 to rotate forward as well. Through threaded transmission and the guiding action of the slide rod 12, the movable plate 6 slides to the left along the length of the detection housing. During this process, the volume of the left cavity gradually increases, creating a negative pressure inside, while the volume of the right cavity gradually decreases. Simultaneously, the control system synchronously controls the control valve on the left air head 9 to open and the control valve on the right air head 9 to close.

[0032] The negative pressure in the left cavity allows contaminated gas to enter through the inlet and outlet of the left suction head 2. The gas first passes through the filter screen 3 inside the left suction head 2, where dust is trapped on the outside of the filter screen 3. The filtered clean contaminated gas then enters the left cavity and then passes through the open left air head 9 into the internal cavity of the cavity plate 7. The gas detection head 8 detects the composition and concentration of the contaminated gas in the cavity and transmits the detection data to the external monitoring system in real time, completing the detection of contaminated gas in a single area.

[0033] Once the left-side area is inspected, the control system issues a cleaning and switching command. The small motor 11 rotates in reverse, causing the threaded rod 5 to reverse as well, and the movable plate 6 slides to the right along the length of the inspection housing. At this time, the volume of the left-side cavity gradually decreases, creating positive pressure inside, while the volume of the right-side cavity gradually increases, creating negative pressure. The control system simultaneously closes the control valve on the left-side air head 9 and opens the control valve on the right-side air head 9.

[0034] The positive pressure in the left cavity causes the internal gas to be discharged outward through the left suction head 2. The discharged gas impacts the filter screen 3 inside the left suction head 2, blowing off the dust intercepted on the outside of the filter screen 3, thus achieving self-cleaning of the filter screen 3. At the same time, the negative pressure in the right cavity causes the polluted gas in the right detection area to enter through the right suction head 2, be filtered by the right filter screen 3, and then enter the right cavity. It then enters the internal cavity of the cavity plate 7 through the open right air head 9. The gas detection head 8 detects the polluted gas in the right area, realizing the switching of the detection area and the synchronous cleaning of the filter screen.

[0035] The small motor 11 continuously alternates between forward and reverse rotation, driving the movable plate 6 to slide back and forth within the detection housing. The control valves on the two air heads 9 open and close alternately accordingly. The device cyclically executes the workflow of "left-side air intake detection + right-side air exhaust cleaning" and "right-side air intake detection + left-side air exhaust cleaning," achieving continuous detection of contaminated gases in two different areas downhole. It also uses the exhaust airflow to periodically self-clean the two filters 3, preventing dust blockage from affecting detection efficiency and accuracy. The entire process requires no manual intervention, achieving automated continuous operation.

[0036] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Those skilled in the art can readily implement the present invention based on the accompanying drawings and the above description. However, any modifications, alterations, or variations made by those skilled in the art without departing from the scope of the present invention, utilizing the disclosed technical content, are equivalent embodiments of the present invention. Furthermore, any modifications, alterations, or variations made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the present invention.

Claims

1. A reciprocating self-cleaning detection device for polluted gases in iron ore mining underground, characterized in that: The device includes a detection housing, with filters (3) fixedly installed at both ends along the length of the detection housing. A movable plate (6) is slidably installed inside the detection housing, which divides the interior of the detection housing into two independent cavities. A cavity plate (7) is fixedly installed on the movable plate (6), and a gas detection head (8) is fixedly installed in the internal cavity of the cavity plate (7). Gas heads (9) are fixedly installed on both sides of the cavity plate (7), and the two gas heads (9) are located in the two cavities respectively. A control valve is fixedly installed on each gas head (9). The detection housing is equipped with a drive assembly, which enables the movable plate (6) to reciprocate along the length of the detection housing.

2. The reciprocating self-cleaning detection device for polluted gas in iron ore mining as described in claim 1, characterized in that: The drive assembly includes a threaded rod (5) and a small motor (11); the small motor (11) is fixedly installed inside the detection housing, and the threaded rod (5) is rotatably installed inside the detection housing. One end of the threaded rod (5) passes through the interior of the movable plate (6) and is threadedly connected to the movable plate (6).

3. The reciprocating self-cleaning detection device for polluted gas in iron ore mining as described in claim 1, characterized in that: The detection housing includes a detection cylinder (1) and an air intake head (2) located at both ends of the detection cylinder (1), and the filter screen (3) is fixedly installed inside the air intake head (2).

4. The reciprocating self-cleaning detection device for polluted gases in iron ore mining underground according to claim 3, characterized in that: Each of the suction heads (2) is fixedly connected to the detection cylinder (1) via an extension hose (4).

5. The reciprocating self-cleaning detection device for polluted gas in iron ore mining as described in claim 4, characterized in that: The extension hose is made of a corrosion-resistant and tensile-resistant flexible material.

6. The reciprocating self-cleaning detection device for polluted gas in iron ore mining as described in claim 1, characterized in that: A slide rod (12) is fixedly installed inside the detection housing. One end of the slide rod (12) passes through the interior of the movable plate (6) and is slidably connected to the movable plate (6).

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