A multi-stage displacement air compressor control system

Abstract

This utility model discloses a multi-stage displacement air compressor control system, including an intake valve, a small-volume air path, a large-volume air path, a proportional valve, a loading solenoid valve, an air-water separator, an oil separator, a rotary pressure sensor, and a controller. The output of the oil separator is connected to the input of the air-water separator via an air path; the output of the air-water separator is connected to the input of the proportional valve; the output of the proportional valve is connected in parallel to the inputs of the small-volume and large-volume air paths; the outputs of the small-volume and large-volume air paths are connected together to the cylinder of the intake valve; the rotary pressure sensor is connected to the input of the controller via a circuit; the output of the controller is connected to the small-volume, large-volume air path, and the loading solenoid valve via a circuit. This utility model controls the air compressor's discharge volume by precisely controlling the opening and closing of the intake valve plate, thereby adapting to the different air volume requirements of a rotary drilling rig for slag removal under different rock strata.

Description

Technical Field

[0001] This utility model belongs to the field of air compressors, specifically relating to a multi-stage displacement air compressor control system. Background Technology

[0002] As a large-diameter drilling device, the roller cone drill uses the downward pressure of the drill bit and its own rotation to crush and break the rock. After crushing, the rock cuttings accumulate, which reduces drilling efficiency and can easily cause the drill bit to get stuck. Therefore, it is necessary to remove the rock cuttings from the bottom of the hole in a timely manner.

[0003] The main existing method for slag removal is to use air compressors to compress air for gas purging. However, the air volume requirements vary when working in different rock strata or at different depths. Large air volumes should be used in deep or hard rock to improve slag removal efficiency, while small air volumes should be used in shallow or soft rock to reduce energy consumption and dust diffusion caused by air compressors, improve dust removal efficiency, and avoid environmental pollution.

[0004] However, traditional rotary drilling rigs use air compressors with a constant exhaust volume, resulting in insufficient air volume when removing slag from deep hard rock and excessive energy consumption when operating in shallow soft rock. They also cannot automatically adjust the air volume according to the hardness of the rock formation, causing drill bit jamming, dust pollution, and energy waste. Utility Model Content

[0005] The purpose of this invention is to provide a multi-stage displacement air compressor control system to address the different air volume requirements for working in different rock formations or at different depths.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A multi-stage displacement air compressor control system includes an intake valve, a small air volume air path, a large air volume air path, a proportional valve, a loading solenoid valve, an air-water separator, an oil separator, a rotary pressure sensor, and a controller.

[0008] The oil separator output is connected to the gas-water separator input via an air circuit.

[0009] The output of the gas-liquid separator is connected to the input of the inverse proportional valve;

[0010] The output of the inverse proportional valve is connected in parallel to the input of the small air volume path and the large air volume path, respectively.

[0011] The small air volume air path output terminal and the large air volume air path output terminal are both connected to the cylinder of the intake valve.

[0012] The rotary pressure sensor is connected to the controller input via a circuit.

[0013] The controller output is connected to the small air volume path, the large air volume path, and the loading solenoid valve via circuits.

[0014] The loading solenoid valve is connected in series in the gas line between the inverse proportional valve and the gas-water separator.

[0015] As a further embodiment of this utility model, the intake valve includes a mechanically linked valve plate and a cylinder. The air pressure input interface of the cylinder is connected to both the small air volume output end and the large air volume output end. The cylinder piston rod is rigidly connected to the valve plate, and the opening and closing angle of the valve plate is controlled by the change of cylinder pressure.

[0016] As a further embodiment of this utility model, the small air volume air path includes, in sequence:

[0017] The input end of the small air volume solenoid valve is connected to the output end of the inverse proportional valve.

[0018] The input end of the small air volume pressure reducing valve is connected to the output end of the small air volume solenoid valve.

[0019] Pressure gauge A is mechanically threaded onto the outlet end of the small air volume pressure reducing valve.

[0020] As a further embodiment of this utility model, the large-volume air path includes, in sequence:

[0021] A high-volume solenoid valve, the input of which is connected to the output of an inverse proportional valve;

[0022] A high-volume pressure reducing valve, the input end of which is connected to the output end of a high-volume solenoid valve;

[0023] Pressure gauge B is installed at the outlet end of the high-volume pressure reducing valve via a mechanical thread.

[0024] Compared with existing technologies, the multi-stage displacement air compressor control system provided by this utility model has the following advantages:

[0025] 1. Energy saving and consumption reduction: The air output is significantly reduced in soft rock conditions, effectively reducing the energy consumption of the air compressor.

[0026] 2. Improved adaptability: High air volume in hard rock improves slag removal efficiency, while low air volume in soft rock suppresses dust diffusion.

[0027] 3. Enhanced reliability: Dual air circuits prevent downtime caused by single-point failure.

[0028] This invention controls the air compressor's exhaust volume by controlling the opening and closing of the intake valve plate, thereby adapting to the different air volume requirements of the rotary drilling rig for slag removal under different rock strata. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only examples of embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0031] Figure label:

[0032] 1. Intake valve; 11. Valve plate; 12. Cylinder; 2. Small air volume air path; 21. Small air volume solenoid valve; 22. Small air volume pressure reducing valve; 23. Pressure gauge A; 3. Large air volume air path; 31. Large air volume solenoid valve; 32. Large air volume pressure reducing valve; 33. Pressure gauge B; 4. Inverse proportional valve; 5. Loading solenoid valve; 6. Air-water separator; 7. Oil separator tank; 8. Rotary pressure sensor; 9. Controller. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0034] In the description of the embodiments of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0035] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, an integral connection, or a detachable connection; they can refer to the internal connection of two components; they can refer to a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of this utility model can be understood according to the specific circumstances.

[0036] See appendix Figure 1 As shown in the figure, an embodiment of the present invention provides a multi-stage displacement air compressor control system, including an intake valve 1, a small air volume air passage 2, a large air volume air passage 3, a reverse proportional valve 4, a loading solenoid valve 5, an air-water separator 6, an oil separator 7, a rotary pressure sensor 8, and a controller 9.

[0037] The output of oil separator 7 is connected to the input of gas-water separator 6 via an air circuit; the output of gas-water separator 6 is connected to the input of inverse proportional valve 4; the output of inverse proportional valve 4 is connected in parallel to the inputs of small air volume air circuit 2 and large air volume air circuit 3 respectively; the outputs of small air volume air circuit 2 and large air volume air circuit 3 are connected together to the cylinder 12 of intake valve 1; rotary pressure sensor 8 is connected to the input of controller 9 via a circuit; the output of controller 9 is connected in circuit to small air volume air circuit 2, large air volume air circuit 3 and loading solenoid valve 5 respectively; loading solenoid valve 5 is connected in series in the air circuit between inverse proportional valve 4 and gas-water separator 6.

[0038] The intake valve 1 includes a mechanically linked valve plate 11 and a cylinder 12. The air pressure input interface of the cylinder 12 is connected to both the output end of the small air volume air passage 2 and the output end of the large air volume air passage 3. The cylinder piston rod is rigidly connected to the valve plate 11. The valve plate 11 is precisely driven to open by the pressure of the cylinder 12, thereby improving the accuracy of exhaust volume control.

[0039] The low-volume gas path 2 includes, in sequence: a low-volume solenoid valve 21, a low-volume pressure reducing valve 22, and a pressure gauge A23. The input of the low-volume solenoid valve 21 is connected to the output of the inverse proportional valve 4; the output of the low-volume pressure reducing valve 22 is connected to the input of the low-volume solenoid valve 21; and the pressure gauge A23 is mechanically threaded onto the low-volume pressure reducing valve 22. This technical solution constructs a dedicated pressure regulating channel for low-volume gas flow, ensuring stable low-volume output in soft rock conditions.

[0040] The high-volume air passage 3 sequentially includes: a high-volume solenoid valve 31, a high-volume pressure reducing valve 32, and a pressure gauge B33. The input end of the high-volume solenoid valve 31 is connected to the output end of the inverse proportional valve 4; the output end of the high-volume pressure reducing valve 32 is connected to the input end of the high-volume solenoid valve 31; and the pressure gauge B33 is mechanically threaded onto the high-volume pressure reducing valve 32. This technical solution constructs a dedicated high-volume pressure regulating channel to meet the high-volume air demand for deep slag removal in hard rock.

[0041] The opening and closing logic of the loading solenoid valve 5 is as follows: When the air compressor starts, the controller 9 controls the loading solenoid valve 5 to close, cutting off the air path between the inverse proportional valve 4 and the air-water separator 6, so that the cylinder 12 has no air pressure input, and the valve plate 11 remains closed, ensuring smooth equipment startup, avoiding damage to the equipment during high-load startup, and improving the startup safety of the air compressor.

[0042] After startup, controller 9 controls the loading solenoid valve 5 to open, restoring air circuit connectivity.

[0043] The controller 9 controls the small air volume solenoid valve 21 and the large air volume solenoid valve 31 to open and close mutually exclusively.

[0044] When the rotation pressure is 4–8 MPa, open the large air volume solenoid valve 31 and close the small air volume solenoid valve 21.

[0045] When the rotation pressure is 1.5–4 MPa, open the small air volume solenoid valve 21 and close the large air volume solenoid valve 31.

[0046] The above technical solution features conflict-free switching between dual gas paths, ensuring rapid response in gas volume regulation.

[0047] The gas flow path is:

[0048] Oil separator 7 → Gas-water separator 6 → Loading solenoid valve 5 → Inverse proportional valve 4 → Small air volume air path 2 or large air volume air path 3 → Cylinder 12. A pressure-controlled separation structure is adopted → pre-pressure reduction → precise pressure adjustment to improve system stability.

[0049] Operating principle of this utility model embodiment:

[0050] 1. Pressure sensing: The rotary pressure sensor 8 monitors the drill bit's rotary pressure in real time;

[0051] 2. Intelligent decision-making: Controller 9 selects the gas path based on the rotation pressure value (4–8 MPa for hard rock / 1.5–4 MPa for soft rock);

[0052] 3. Gas path switching:

[0053] Hard rock → Open high-volume solenoid valve 31 → High-pressure gas drives valve plate 11 to full opening

[0054] Soft rock → Open small air volume solenoid valve 21 → Low-pressure gas drives valve plate 11 to a small opening

[0055] 4. Staged pressure regulation: Oil separator 7 high-pressure gas → gas-water separator 6 dehumidification → reverse proportional valve 4 pre-pressure reduction → pressure reducing valve 22 / 32 precise pressure regulation → cylinder 12 positioning valve plate 11.

[0056] The multi-stage displacement air compressor control system of this utility model controls the air compressor's exhaust volume by precisely controlling the opening and closing of the intake valve plate, thereby adapting to the different air volume requirements of the rotary drilling rig for slag removal under different rock strata.

[0057] The foregoing has shown and described the basic principles of the present invention. The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. The above embodiments and descriptions in the specification are only illustrative of the principles of the present invention. Any modifications, equivalent substitutions, and improvements made within the scope of the present invention without departing from the scope of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-stage displacement air compressor control system, characterized in that: Includes an intake valve (1), a small air volume air passage (2), a large air volume air passage (3), a reverse proportional valve (4), a loading solenoid valve (5), an air-water separator (6), an oil separator (7), a rotary pressure sensor (8), and a controller (9); The output end of the oil separator (7) is connected to the input end of the gas-water separator (6) via a gas path; The output end of the gas-water separator (6) is connected to the input end of the inverse proportional valve (4); The output of the inverse proportional valve (4) is connected in parallel to the input of the small air volume path (2) and the large air volume path (3); The output end of the small air volume air passage (2) and the output end of the large air volume air passage (3) are connected to the cylinder (12) of the air intake valve (1). The rotary pressure sensor (8) is connected to the input terminal of the controller (9) via a circuit; The output of the controller (9) is connected to the small air volume air path (2), the large air volume air path (3) and the loading solenoid valve (5) respectively through the circuit. The loading solenoid valve (5) is connected in series in the gas path between the inverse proportional valve (4) and the gas-water separator (6).

2. The multi-stage displacement air compressor control system according to claim 1, characterized in that: The intake valve (1) includes a mechanically linked valve plate (11) and a cylinder (12). The air pressure input interface of the cylinder (12) is connected to both the output end of the small air volume air path (2) and the output end of the large air volume air path (3). The cylinder piston rod is rigidly connected to the valve plate (11), and the opening and closing angle of the valve plate is controlled by the change of cylinder pressure.

3. The multi-stage displacement air compressor control system according to claim 2, characterized in that: The small air volume air path (2) includes, in sequence: The input end of the small air volume solenoid valve (21) is connected to the output end of the inverse proportional valve (4); The input end of the small air volume pressure reducing valve (22) is connected to the output end of the small air volume solenoid valve (21); Pressure gauge A (23) is installed at the outlet end of small air volume pressure reducing valve (22) via mechanical thread.

4. The multi-stage displacement air compressor control system according to claim 3, characterized in that: The high-volume air passage (3) includes, in sequence: A high-volume solenoid valve (31) has its input end connected to the output end of an inverse proportional valve (4); A high-volume pressure reducing valve (32) has its input end connected to the output end of a high-volume solenoid valve (31); Pressure gauge B (33) is mechanically threaded onto the outlet end of the large air volume pressure reducing valve (32).

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