A mobile gas booster filling machine

Abstract

This utility model provides a mobile gas booster and filling machine, including a base frame and a chassis mounted on the base frame, within which the filling machine body is housed. The filling machine body includes a single-screw compressor mounted on the base frame, a motor assembly on one side of the single-screw compressor, an oil circulation system within the chassis, and an oil-gas separation system at one end of the chassis. This utility model employs an oil-injected screw compressor head, which boasts superior and reliable performance, exhibiting low vibration, low noise, and high efficiency. The equipment has a simple structure, few moving parts, and convenient daily maintenance, resulting in lower maintenance costs and reducing long-term operating costs. It can stably boost low-pressure downhole gas (typically 0.3~0.8MPa) to higher pressures (e.g., 2.0MPa and above), meeting the high-pressure requirements of downhole nitrogen injection, displacement, and pneumatic tool applications. It fundamentally solves the pressure loss problem caused by long-distance transportation, ensuring sufficient pressure at the gas consumption point and enabling related equipment to operate at its optimal efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of gas boosting and filling equipment, and in particular to a mobile gas boosting and filling machine. Background Technology

[0002] Coal mine safety is of paramount importance to the national energy strategy, with gas control and emergency response being two core aspects of ensuring miners' lives and orderly mine production. In this process, high-pressure gases such as compressed air, oxygen, and nitrogen play an irreplaceable role. Compressed air powers numerous pneumatic devices underground (such as pneumatic picks, drills, and bolting machines), serving as the "lifeblood" of production. Nitrogen is used in coal mine fire prevention and extinguishing, gas dilution, and other areas, acting as a safety barrier.

[0003] However, traditional underground gas supply methods have fatal flaws, severely restricting safety and production efficiency. They are heavily reliant on fixed pipelines and have extremely poor flexibility: underground pneumatic tools mainly rely on ground-based fixed air compressor stations and a vast pipeline network for gas supply. The pipeline network has a limited reach, and for tunneling faces and remote roadways far from the main pipeline, insufficient air pressure leads to a significant decrease in equipment efficiency, seriously affecting mining progress.

[0004] Chinese patent CN202421118993.8 discloses a mobile gas booster filling machine, including a movable chassis with casters at the bottom. An equipment box is mounted on the chassis, housing a booster filling system. The inlet of the booster filling system can be connected to a gas source cylinder, and the outlet can be connected to a cylinder to be filled. A fixing device is provided on one side of the equipment box, securing the gas source cylinder to the chassis. The gas source cylinder is replaceable. This filling machine offers high mobility, freeing the filling operation from the limitation of a fixed gas source cylinder location, thus improving operational flexibility and convenience.

[0005] However, this technical solution has certain shortcomings in its application. Underground coal mine production operations require a large amount of compressed gas. Conventional methods for supplying this gas are generally twofold: one is to remotely transport compressed gas from the surface to the required location within the mine; the other is to directly use a dedicated underground compressor to produce gas near the desired location. However, both methods suffer from drawbacks such as low exhaust pressure and transport losses. By the time the gas reaches the point of use, significant pressure has been lost, resulting in suboptimal efficiency for the corresponding equipment or facilities. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies by providing a mobile gas booster filling machine that achieves boosting function through an oil-injected single-screw compressor head in conjunction with an oil-gas separation system, thereby solving the problem of suboptimal efficiency.

[0007] To achieve the above objectives, this utility model provides the following technical solution: A mobile gas booster filling machine includes a base frame and a chassis mounted on the base frame, within which a filling machine body is housed. The filling machine body includes a single-screw compressor mounted on the base frame, a motor assembly on one side of the single-screw compressor, an oil circulation system within the chassis, and an oil-gas separation system at one end of the chassis. A cooling system is located on one side of the single-screw compressor. An electrical control system is also housed within the chassis. A pipe inlet is connected to one end of the chassis, and the tail end of the pipe inlet is connected to the single-screw compressor. A heat exchanger is sealed to one end of the oil-gas separation system, and a pipe outlet is connected to the heat exchanger. A safety protection system is also provided within the chassis. The single-screw compressor consists of a cylindrical screw and two symmetrically arranged planar star wheels, mounted within a housing. The screw's helical groove, the inner wall of the housing, and the tooth surfaces of the star wheels form a closed basic volume.

[0008] The oil circulation system is equipped with a check valve and an oil shut-off valve.

[0009] The electrical control system is equipped with a PLC control system.

[0010] The safety protection system incorporates multiple safety interlocking devices.

[0011] A filter is sealed and connected to the air inlet end of the pipeline.

[0012] Two sets of moving components are provided under the base frame. The two sets of moving components include: a moving shaft, which is movably connected to the base frame; anti-slip wheels, which are fixedly connected to both ends of the moving shaft; brake discs, which are fixedly connected to the moving shaft; and brake calipers, which are installed under the base frame.

[0013] The two sets of moving components further include: supporting feet, the two sets of supporting feet being located outside the moving shaft; a cylinder, the cylinder being mounted on the supporting feet; and a damper, the damper being located below the cylinder.

[0014] The beneficial effects of this utility model are as follows: (1) This utility model adopts an oil-injected screw-type compressor head, which has superior and reliable performance, low vibration, low noise, and high efficiency. The equipment has a simple structure, few moving parts, convenient daily maintenance, and low maintenance costs, reducing the cost pressure of long-term operation. It can also stably increase the pressure of low-pressure gas (usually 0.3~0.8MPa) in the well to higher pressures (such as 2.0MPa and above), meeting the needs of high-pressure working conditions such as downhole nitrogen injection, replacement, and pneumatic tools. It fundamentally solves the problem of pressure loss caused by long-distance transportation, ensures sufficient pressure at the gas consumption point, and enables the relevant equipment to perform at its best.

[0015] (2) This utility model has a compact design and a small footprint, making it easy to transport, install and arrange in underground roadways with limited space. It can adapt to the harsh environment of high temperature, high humidity and dust in underground mines, and has a good protection level and heat dissipation system.

[0016] (3) The booster of this utility model adopts an oil-injected single screw type compressor head, which has superior and reliable performance. It has low vibration, low noise, high efficiency, and no easily damaged parts, and has unparalleled advantages over piston compressors (under the same exhaust pressure). Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure of this utility model from below; Figure 3 This is a schematic diagram of the internal structure of this utility model; Figure 4 This is a schematic diagram of the internal structure of the chassis of this utility model; Figure 5 This is a schematic diagram of the overall structure of the filling machine of this utility model; Figure 6 This is a top view of the overall structure of the filling machine of this utility model; Figure 7 This is a partial structural diagram of the filling machine of this utility model; Figure 8 for Figure 2 Enlarged structural diagram at point A.

[0018] Figure Labels 1. Base frame; 11. Moving assembly; 111. Moving shaft; 112. Anti-slip wheel; 113. Brake disc; 114. Brake caliper; 115. Support feet; 116. Cylinder; 117. Damper; 2. Chassis; 3. Filling machine body; 301. Single screw compressor main unit; 302. Motor assembly; 303. Oil circulation system; 304. Oil-gas separation system; 305. Cooling system; 306. Electrical control system; 307. Pipeline inlet; 3071. Filter; 308. Heat exchanger; 3081. Pipeline outlet; 309. Safety protection system. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0021] Example 1 like Figures 1-7As shown, this embodiment provides a mobile gas booster filling machine. The mobile gas booster filling machine includes a base frame 1 and a chassis 2 on the base frame 1. A filling machine body 3 is disposed inside the chassis 2. The filling machine body 3 includes a single-screw compressor 301 mounted on the base frame 1. A motor assembly 302 is disposed on one side of the single-screw compressor 301. An oil circulation system 303 is disposed inside the chassis 2. An oil-gas separation system 304 is disposed at one end of the chassis 2. A cooling system 305 is disposed on one side of the single-screw compressor 301. An electrical control system 306 is also disposed inside the chassis 2. A pipe inlet 307 is connected through one end of the chassis 2, and the tail end of the pipe inlet 307 is connected to the single-screw compressor 301. A heat exchanger 308 is sealed to one end of the oil-gas separation system 304, and a pipe outlet 3081 is connected through the heat exchanger 308. A safety protection system 309 is also disposed inside the chassis 2. The single-screw compressor main unit 301 consists of a cylindrical screw and two symmetrically arranged planar star wheels, which are meshed together inside the housing. The screw helical groove, the inner wall of the housing, and the tooth surface of the star wheels form a closed basic volume.

[0022] In this embodiment, all components of the filling machine body 3 are mounted on a single vehicle frame via the base frame 1 and the chassis 2, forming a mobile and flexible downhole booster unit that can be towed or pushed to any location where work is required. The single-screw compressor 301 uses an internal screw to drive a star wheel tooth that sequentially meshes with a spiral groove. Gas enters the screw groove space from the intake chamber. As the star wheel tooth slides relative to the screw groove, the gas is compressed while atomized lubricating oil is injected. The oil-gas mixture is discharged from the exhaust port of the casing. The discharged gas is separated by the oil-gas separation system 304, cooled by the cooling system 305 and the heat exchanger 308, and then discharged from the pipeline outlet 3081. This process increases the pressure of low-pressure gas in the low-pressure pipeline network to 2.0 MPa before output, improving the gas pressure at the point of use and enabling the corresponding equipment to perform its functions. This compressor head has superior and reliable performance, is lightweight, has low vibration, low noise, high efficiency, and no easily damaged parts.

[0023] The oil circulation system 303 is equipped with a check valve and an oil shut-off valve.

[0024] In this embodiment, the check valve and the oil cut-off valve can effectively prevent the machine head from reversing and starting under load.

[0025] The electrical control system 306 is equipped with a PLC control system.

[0026] In this embodiment, the PLC control system enables functions such as one-button start / stop, automatic unloading, and fault self-diagnosis, reducing reliance on operator skills and improving operational safety.

[0027] The safety protection system 309 incorporates multiple safety interlocking devices.

[0028] In this embodiment, the safety interlock device in the safety protection system 309 includes: pressure over-limit protection to prevent excessive outlet pressure; temperature protection to monitor oil and exhaust temperatures and avoid overheating; oil cut-off protection to ensure the main unit never runs out of oil; motor overload protection to ensure the safety of the drive system; temperature sensors to monitor the maximum allowable operating temperature of the compressor and the lubricating oil temperature; and pressure sensors to control the upper, lower, and ultimate pressure limits of the compressor operation. When the exhaust pressure and the gas tank pressure exceed the set values, the safety valve automatically opens to release the overpressure gas.

[0029] A filter 3071 is sealed and connected to the air inlet end 307 of the pipeline.

[0030] In this embodiment, the filter 3071 can filter the low-pressure gas in the pipeline network to prevent impurities from entering the equipment.

[0031] Example 2 like Figure 8 As shown, components that are the same as or corresponding to those in Embodiment 1 are referred to using the same reference numerals as in Embodiment 1. For simplicity, only the differences from Embodiment 1 are described below. The difference between Embodiment 2 and Embodiment 1 is as follows: Two sets of moving components 11 are provided under the base frame 1. The two sets of moving components 11 include: a moving shaft 111, which is movably connected to the base frame 1; anti-slip wheels 112, which are fixedly connected to both ends of the moving shaft 111; brake discs 113, which are fixedly connected to the moving shaft 111; and brake calipers 114, which are installed under the base frame 1.

[0032] The two sets of moving components 11 also include: support feet 115, which are located on the outside of the moving shaft 111; cylinder 116, which is mounted on the support feet 115; and damper 117, which is located below the cylinder 116.

[0033] In this embodiment, the frictional resistance between the brake caliper 114 and the brake disc 113 ensures the stability of the equipment during operation, and the four sets of cylinders 116 drive the support feet 115 to contact the ground to further improve the overall stability of the equipment and increase the equipment's grip. The damper 117 can effectively reduce shock, reduce the vibration of the equipment during operation, and buffer the movement.

[0034] Working principle The equipment is moved to the working position by the anti-slip wheel 112 of the moving shaft 111. The equipment is stopped by the frictional resistance between the brake caliper 114 and the brake disc 113. After stopping, the support feet 115 are driven by four sets of cylinders 116 to contact the ground, thereby further improving the overall stability of the equipment and increasing the equipment's grip. The low-pressure gas in the pipeline is connected to the inlet 307 of the pipeline. After being filtered by the filter 3071, the low-pressure gas enters the single screw compressor 301 for compression. The screw in the single screw compressor 301 drives the star wheel teeth to circulate and mesh with the spiral groove in sequence. The gas enters the screw groove space from the suction chamber. When the star wheel teeth enter the screw groove, as the star wheel teeth slide relative to each other in the screw groove, the gas is compressed and atomized lubricating oil is sprayed in. The oil-gas mixture is discharged from the exhaust port of the shell. During compression, an oil-gas mixture is formed with the injected lubricating oil. The compressed oil-gas mixture enters the oil-gas separation system 304, where it is separated by rotating machinery and an oil separator core, reducing the oil content in the compressed gas to 2-4 PPM. After being cooled by the cooling system 305 and heat exchanger 308, it is then supplied to the user. This process increases the pressure of low-pressure gas in the low-pressure pipeline network to 2.0 MPa before output, improving the gas pressure at the point of use and enabling the corresponding equipment to perform its functions. During unit operation, the lubricating oil in the oil-gas separation system 304 returns to the compression chamber of the single-screw compressor main unit 301 due to the pressure difference. Most of the lubricating oil is sprayed into the compression chamber for cooling, sealing, and lubrication. After mixing with the gas, it is discharged through the exhaust port to the oil-gas separation system 304 for another cycle. A small portion of the lubricating oil is divided into two paths: one goes to the exhaust end to lubricate the bearings, and the other enters through the machine body to lubricate the intake end bearings.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A mobile gas booster filling machine, comprising a base frame (1), characterized in that, It also includes a chassis (2) on the base frame (1), and a filling machine body (3) is provided inside the chassis (2). The filling machine body (3) includes a single screw compressor host (301) installed on the base frame (1), a motor assembly (302) is provided on one side of the single screw compressor host (301), an oil circulation system (303) is provided inside the machine box (2), and an oil-gas separation system (304) is provided at one end of the machine box (2). A cooling system (305) is provided on one side of the single screw compressor host (301). An electrical control system (306) is also provided inside the chassis (2). A pipeline inlet (307) is connected through one end of the chassis (2). The tail end of the pipeline inlet (307) is connected to the single screw compressor host (301). A heat exchanger (308) is sealed to one end of the oil-gas separation system (304). A pipeline outlet (3081) is connected through the heat exchanger (308). A safety protection system (309) is also provided inside the chassis (2). The single-screw compressor main unit (301) consists of a cylindrical screw and two symmetrically arranged planar star wheels, which are meshed together in the housing. The screw helical groove, the inner wall of the housing and the tooth surface of the star wheel form a closed basic volume.

2. The mobile gas booster filling machine according to claim 1, characterized in that, The oil circulation system (303) is equipped with a check valve and an oil shut-off valve.

3. A mobile gas booster filling machine according to claim 1, characterized in that, The electrical control system (306) is equipped with a PLC control system.

4. A mobile gas booster filling machine according to claim 1, characterized in that, The safety protection system (309) has multiple built-in safety interlock devices.

5. A mobile gas booster filling machine according to claim 1, characterized in that, A filter (3071) is sealed and connected to the air inlet end (307) of the pipeline.

6. A mobile gas booster filling machine according to claim 1, characterized in that, Two sets of moving components (11) are provided under the base frame (1). The two sets of moving components (11) include: a moving shaft (111), which is movably connected to the base frame (1); anti-slip wheels (112), which are fixedly connected to both ends of the moving shaft (111); brake discs (113), which are fixedly connected to the moving shaft (111); and brake calipers (114), which are installed under the base frame (1).

7. A mobile gas booster filling machine according to claim 6, characterized in that, The two sets of moving components (11) further include: support feet (115), the two sets of support feet (115) are located outside the moving shaft (111); cylinder (116), the cylinder (116) is mounted on the support feet (115); and damper (117), the damper (117) is located below the cylinder (116).

Images