Derusting and drainage system for compressed air pipeline

Abstract

The invention provides a pressure ventilation pipeline derusting and drainage system which comprises a control unit and a derusting and drainage device, the derusting and drainage device is installed on a pressure ventilation pipeline and comprises a short connecting pipe, the short connecting pipe is communicated with the pressure ventilation pipeline, a turbofan is arranged in the short connecting pipe, the short connecting pipe is communicated with a reducer pipe, and the reducer pipe is communicated with a water pump. A circle of electromagnets are arranged on the periphery of the upper end of the reducer pipe, valves are arranged in the middle and at the tail end of the reducer pipe, the electromagnets are connected with a power source, and the control unit is connected with the valves and the power source. The rust removal and drainage device is installed on the compressed air pipeline, rust in the compressed air pipeline is discharged out of the compressed air pipeline through the synergistic effect of electrified adsorption of the electromagnet and compressed air power, and the rust and condensate water are discharged through the reducer pipe, so that the condensate water can be discharged while the rust is removed, and efficient cleaning of the rust and the condensate water is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline rust removal, and in particular to a compressed air pipeline rust removal and drainage system. Background Art

[0002] As a core component of the mine's "life passage," the compressed air pipeline in underground coal mines is subjected to high temperatures (30-40°C), high humidity (relative humidity ≥90%), corrosive gases (SO2 concentration can reach 50ppm), and mechanical vibrations for a long time. The layered rust (mainly composed of Fe2O3·nH2O) formed on the inner wall of the iron pipeline can cause the following prominent problems:

[0003] Ventilation efficiency declines: When rust reaches a certain thickness, the drag coefficient along the pipeline increases accordingly, resulting in a drop in the air supply pressure at the end. Equipment safety hazards: Falling rust particles (particle size 0.1-3mm) can easily clog the nozzles of pneumatic rock drills (increasing the failure rate by 60%) and cause air pump fans to become stuck (increasing repair costs by 10,000 yuan per incident).

[0004] Chinese patent publication number CN210278601U discloses a rust removal device for underground coal mine air ducts, comprising: a device body, a filter element, and an adsorbent element. The filter element is disposed at the air outlet end of the device body, and an adsorbent element is disposed on the side of the filter element near the air inlet end of the device body, so that the adsorbent element adsorbs rust and filters the rust through the filter element. The filter element and adsorbent element remove rust and other impurities in the air, effectively reducing the chance of equipment damage and ensuring safe production. However, this device cannot remove rust from the air duct. Over long periods of operation, rust will accumulate in the filter element and adsorbent element, ultimately causing damage to the equipment. Condensate will be generated in the compressed air pipeline due to cooling, and this condensate will often accumulate in low-lying areas of the delivery pipeline, forming water accumulation, increasing the resistance to compressed air delivery, and affecting the efficiency of compressed air use. Summary of the Invention

[0005] The technical problem to be solved by the present invention is how to remove condensed water while removing rust.

[0006] The present invention solves the above technical problems through the following technical means:

[0007] The present invention provides a rust removal and drainage system for a compressed air pipeline, which includes a control unit and a rust removal and drainage device. The rust removal and drainage device is installed on the compressed air pipeline. The rust removal and drainage device includes a short pipe, which is connected to the compressed air pipeline and has a turbofan inside the short pipe. The short pipe is connected to a reducer. A circle of electromagnets is arranged on the outer periphery of the upper end of the reducer, and valves are arranged in the middle and at the end. The electromagnets are connected to a power supply, and the control unit is connected to the valve and the power supply.

[0008] Beneficial effect: The present invention installs a rust removal and drainage device in the compressed air pipeline. The rust in the compressed air pipeline is adsorbed by the electromagnet through electricity and the compressed air power works together to suck the rust and push the condensed water into the reducer. The rust and condensed water are discharged through the reducer, so that the rust can be removed and the condensed water can be removed at the same time, thereby achieving efficient cleaning of rust and condensed water. The present invention controls the adsorption force of the electromagnet and the switching of the valve through the control unit to remove rust and condensed water according to actual conditions.

[0009] Preferably, the control unit is provided with a liquid level sensor, which is connected to the control unit and fixed below the electromagnet.

[0010] Beneficial effect: The present invention sets a liquid level sensor below the electromagnet. When the liquid level of condensed water reaches the bottom of the electromagnet, the liquid level sensor transmits a signal to the control unit. The control unit turns on the power and valve, and the rust removal and drainage device performs rust removal and drainage work.

[0011] Preferably, it further comprises a rust removal ball device, which is arranged at the front end of the compressed air pipeline, and the rust removal and drainage device is arranged in front of the branch fork of the compressed air pipeline.

[0012] Beneficial effect: The rust removal ball device is set at the front end of the compressed air pipeline, so that the device can remove rust and part of condensed water between the front end of the compressed air pipeline and the branch fork, thereby maximizing the removal of rust and condensed water; the compressed air pipeline is equipped with air-using equipment after the branch fork, and the rust and condensed water are removed in advance through the rust removal and drainage device and the rust removal ball device to prevent them from entering the air-using equipment and damaging the air-using equipment.

[0013] Preferably, the rust removal ball device includes rust removal balls, and the rust removal balls are one or more of polyurethane abrasive balls, wire brush balls, magnetic rust removal balls or nylon brush balls.

[0014] Preferably, a filter screen is provided below the reducer, and rust removal balls are obtained by filtering through the filter screen, and the rust removal balls can be recycled and reused.

[0015] Preferably, the rust removal ball device includes a short tube and a second valve, the short tube is connected to the compressed air pipeline, the short tube is connected to the goal tube, the goal tube is provided with two second valves, the rust removal ball is placed between the two second valves, and the second valve is connected to the control unit.

[0016] Beneficial effect: The present invention provides a rust removal ball device, and the rust removal balls move in the compressed air pipeline, which will take away rust and part of condensed water in the compressed air pipeline, further improving the efficiency of rust removal and drainage.

[0017] Preferably, the diameter of the rust removing ball is slightly smaller than the minimum inner diameter of the reducer.

[0018] Preferably, the valve includes an electric ball valve and an electric butterfly valve, the electric ball valve is arranged in the middle of the reducer, and the electric butterfly valve is arranged at the end of the reducer.

[0019] Beneficial effect: The present invention uses two different electric valves to control the flow rates of rust, condensed water and rust removal balls, thereby preventing rust or rust removal balls from being blocked in the reducer.

[0020] Preferably, the angle between the short connecting pipe and the reducer is 40-50°.

[0021] More preferably, the included angle between the short connecting pipe and the reducer is 45°.

[0022] Preferably, the inner diameter of the reducer gradually decreases from top to bottom, and the reduction angle is 8-10°.

[0023] Beneficial effect: The present invention gradually reduces the inner diameter of the reducer from top to bottom, so as to increase the wind speed and further improve the effect of removing rust, condensed water and rust removal balls. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a structural diagram of the compressed air pipeline rust removal and drainage system in the embodiment;

[0025] Figure 2 Schematic diagram of the structure of the rust removal ball device in the embodiment. DETAILED DESCRIPTION

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0027] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention; in addition, the terms "first", "second", and "third" are only used for descriptive purposes and should not be understood as indicating or implying relative importance. It should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a communication between the internal parts of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] according to Figure 1-2 As shown, this embodiment provides a compressed air pipeline rust removal and drainage system, wherein the compressed air pipeline 10 is a compressed air pipeline 10 in a coal mine. Figure 1 The direction of the medium-pressure air is from left to right. The compressed air pipeline 10 is at the leftmost end. The compressed air pipeline 10 is a 159 iron pipe. The 159 iron pipe is the main compressed air pipeline with an air pressure of 0.3-0.7 MPa. When the 159 iron pipe is laid, a rust removal and drainage device 20 is installed. The installation position is in front of the branch 11 of the compressed air pipeline 10. The rust removal and drainage device 20 is controlled by a control unit (not shown). The control unit uses existing technology, such as PLC or DSP control.

[0029] The rust removal and drainage device 20 includes a short pipe 21, which is connected to the compressed air pipeline 10 and secured via a flange and bolts. Gaskets are provided on the bolts and the connecting surface to enhance sealing and reduce loosening. A turbofan 211 is installed within the short pipe 21. The turbofan 211 guides the airflow along the pipe wall in a spiral motion, creating a stable laminar flow, reducing wind resistance and improving the efficiency of compressed air delivery. The side of the short pipe 21 is connected to a reducer 22, which uses the centrifugal force of the turbofan 211 to fling rust and condensed water toward the reducer 22, where the rust and condensed water are then removed.

[0030] The included angle between the short pipe 21 and the reducer 22 is 45°. The reducer 22 is a tapered pipe, and its inner diameter gradually decreases from top to bottom, with a reduction angle of 9°. The purpose of this design is to increase the wind speed by reducing the inner diameter, increase the speed at which rust and condensed water are discharged from the reducer 22, and avoid rust deposition or condensed water retention caused by low-speed airflow.

[0031] A circle of electromagnets 221 is provided on the outer periphery of the upper end of the reducer 22. In this embodiment, 3 or 4 electromagnets can be provided according to the outer diameter of the upper end of the reducer 22, surrounding the upper end of the reducer 22. The electromagnets 221 are connected to the power supply through a circuit, and the power supply is controlled by the control unit to control whether the electromagnet 221 has the adsorption force to attract rust.

[0032] An electric ball valve 222 is provided in the middle of the reducer 22, and an electric butterfly valve 223 is provided at the end thereof. The electric ball valve 222 and the electric butterfly valve 223 are controlled by a control unit to control the flow rate of rust and condensed water, thereby preventing rust from being blocked in the reducer 22.

[0033] The control unit is provided with a liquid level sensor (not shown), which is connected to the control unit and is arranged below the electromagnet 221. When the liquid level of the condensed water in the reducer 22 reaches the position of the liquid level sensor, the liquid level sensor sends a signal to the control unit. At this time, the control unit turns on the power supply, the electric ball valve 222 and the electric butterfly valve 223, and starts the rust removal and drainage work of the rust removal and drainage device 20.

[0034] The compressed air pipeline rust removal and drainage system also includes a rust removal ball device 30, which is installed at the front end of the compressed air pipeline 10. The rust removal ball device 30 includes a rust removal ball 31, a short tube 32 and a second valve 33. The short tube 33 is communicated with the compressed air pipeline 10, and the side of the short tube 33 is connected to the goal pipe. The goal pipe is provided with two second valves 33, and the rust removal ball 31 is placed between the two second valves 33. There are multiple rust removal balls 31, for example, 10 rust removal balls 31 are provided. The second valves 33 are connected to a control unit, and the control unit controls the switch of the second valves 33 to control whether the rust removal balls 31 enter the compressed air pipeline 10 for rust removal and drainage. When the 10 rust removal balls 31 are discharged through the reducer 22, the control unit turns off the power supply, the electric ball valve 222, the electric butterfly valve 223 and the second valve 33, thereby ending the rust removal and drainage work of the rust removal and drainage device 20 and the rust removal ball device 30.

[0035] The rust removal balls 31 used in this embodiment are wire brush balls. The diameter of the wire brush balls is slightly smaller than the minimum inner diameter of the reducer 22, allowing the wire brush balls to be discharged through the reducer 22, removing rust and some condensed water from the compressed air pipeline 10. A filter screen (not shown) is provided below the reducer 22. The filter screen can filter out rust and condensed water, but the wire brush balls cannot pass through. Therefore, the wire brush balls can be recycled and placed in the rust removal ball assembly 30 for reuse. The wire brush balls can be reused for 1-3 months.

[0036] The working principle of this embodiment is as follows: when the compressed air pipeline 10 in the coal mine is undergoing rust removal and drainage, it does not need to be shut down, but can be kept in working condition.

[0037] The compressed air in the compressed air pipeline 10 causes the turbofan 211 in the short pipe 21 to work all the time. The turbofan 211 guides the airflow to spiral along the pipe wall, forming a stable laminar flow state, reducing wind resistance, and improving the compressed air transmission efficiency; at the same time, the centrifugal force of the turbofan 211 is used to throw the rust and condensed water toward the reducer 22. At this time, there is rust deposition and condensed water retention in the reducer 22. When the liquid level of the condensed water reaches the liquid level sensor, the liquid level sensor sends a signal to the control unit. At this time, the control unit turns on the power supply, the electric ball valve 222, the electric butterfly valve 223 and the second valve 33. At this time, the electromagnet 221 can absorb the rust. At the same time, the compressed air pushes the wire brush ball to move along the compressed air pipeline 10, carrying the rust and part of the condensed water to the short pipe 21, and then enters the reducer 22 to achieve the purpose of discharging the rust and condensed water. Ten wire brush balls enter the compressed air pipeline 10 in turn, and perform rust removal and drainage on the compressed air pipeline 10 multiple times. They can remove rust and condensed water from 300m of the compressed air pipeline 10, and the rust removal rate reaches 92%.

[0038] When all 10 wire brush balls pass through the electric butterfly valve 223, the electric butterfly valve 223 sends a signal to the control unit, and the control unit turns off the power supply, the electric ball valve 222, the electric butterfly valve 223 and the second valve 33 to complete the rust removal and drainage work. The wire brush balls are recovered through the filter and then placed between the second valve 33 to wait for the next rust removal and drainage work.

[0039] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A compressed air pipeline rust removal and drainage system, characterized in that: The invention comprises a control unit and a rust removal and drainage device (20). The rust removal and drainage device (20) is installed on a compressed air pipeline (10). The rust removal and drainage device (20) comprises a short pipe (21), the short pipe (21) is communicated with the compressed air pipeline (10), a turbofan (211) is arranged inside the short pipe (21), the short pipe (21) is communicated with a reducer (22), a circle of electromagnets (221) is arranged on the outer periphery of the upper end of the reducer (22), valves are arranged in the middle and at the end thereof, the electromagnets (221) are connected to a power supply, and the control unit is connected to the valve and the power supply.

2. The compressed air pipeline rust removal and drainage system according to claim 1, characterized in that: The control unit is provided with a liquid level sensor, which is connected to the control unit and fixed below the electromagnet (221).

3. The compressed air pipeline rust removal and drainage system according to claim 1, characterized in that: It also includes a rust removal ball device (30), which is arranged at the front end of the compressed air pipeline (10), and the rust removal drainage device (20) is arranged in front of the branch (11) of the compressed air pipeline (10).

4. The compressed air pipeline rust removal and drainage system according to claim 3, characterized in that: The rust removal ball device (30) comprises a rust removal ball (31), and the rust removal ball (31) is one or more of a polyurethane abrasive ball, a steel wire brush ball, a magnetic rust removal ball or a nylon brush ball.

5. The compressed air pipeline rust removal and drainage system according to claim 4, characterized in that: A filter screen is provided below the reducer (22), and rust removal balls (31) are obtained by filtering through the filter screen. The rust removal balls (31) can be recycled and reused.

6. The compressed air pipeline rust removal and drainage system according to claim 3, characterized in that: The rust removal ball device (30) comprises a short tube (32) and a second valve (33), wherein the short tube (33) is connected to the compressed air pipeline (10), and the short tube (33) is connected to the ball pipe, and the ball pipe is provided with two second valves (33), and the rust removal ball (31) is placed between the two second valves (33), and the second valve (33) is connected to a control unit.

7. The compressed air pipeline rust removal and drainage system according to claim 4, characterized in that: The diameter of the rust removal ball (31) is slightly smaller than the minimum inner diameter of the reducer (22).

8. The compressed air pipeline rust removal and drainage system according to claim 1, characterized in that: The valve comprises an electric ball valve (222) and an electric butterfly valve (223), wherein the electric ball valve (222) is arranged in the middle of the reducer (22), and the electric butterfly valve (223) is arranged at the end of the reducer (22).

9. The compressed air pipeline rust removal and drainage system according to claim 1, characterized in that: The included angle between the short pipe (21) and the reducer (22) is 40-50°.

10. The compressed air pipeline rust removal and drainage system according to claim 1, characterized in that: The inner diameter of the reducer (22) gradually decreases from top to bottom, and the reduction angle is 8-10 degrees.

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