Hydraulic drive compressor structure beneficial to overhaul

Abstract

The utility model relates to the technical field of hydraulic-driven compressors, in particular to a hydraulic-driven compressor structure beneficial to overhaul. Comprising an air cylinder, a connecting barrel and a hydraulic cylinder, an oil piston is arranged in the hydraulic cylinder, an air piston is arranged in the air cylinder, the oil piston is connected with an oil cylinder piston rod, the air piston is connected with an air cylinder piston rod, and the oil cylinder piston rod and the air cylinder piston rod are connected in the connecting barrel through a split type coupler. Flanges at the two ends of the upper half connecting cylinder and the lower half connecting cylinder are fixedly connected with the air cylinder and the hydraulic cylinder through a plurality of bolts respectively, and seams of the upper half connecting cylinder and the lower half connecting cylinder are in butt joint in a matched mode. The piston rod of the oil cylinder and the piston rod of the air cylinder are connected in the connecting barrel through the split type coupler, during overhauling, only the upper half connecting barrel needs to be detached, then the split type coupler is disconnected, the air cylinder or the hydraulic cylinder can be detached independently, the detaching difficulty is lowered, the working efficiency is improved, and the compressor pry is suitable for a compressor pry which is compact in structure and lacks a detaching space.

Description

Technical fields:

[0001] This utility model relates to the field of liquid-driven compressor technology, and in particular to a liquid-driven compressor structure that is easy to maintain. Background technology:

[0002] Currently, hydraulic compressors generally consist of a cylinder, a connecting sleeve, and a hydraulic cylinder. The connecting sleeve connects the hydraulic cylinder and the cylinder, acting as a bridge between them. The hydraulic cylinder contains an oil piston, and the cylinder contains a gas piston. The oil piston and the gas piston are connected by a piston rod. When the oil piston reciprocates, it drives the gas piston to reciprocate via the piston rod, thus pressurizing the gas. In this type of hydraulic compressor, disassembly and maintenance are difficult because the connecting sleeve is an integral structure, and the piston rod is a single piece located inside the connecting sleeve. Therefore, it is impossible to lift out the cylinder or hydraulic cylinder separately for maintenance; the entire hydraulic compressor must be lifted out. Due to the compact structure of the compressor skid and the lack of disassembly space, lifting the entire hydraulic compressor out is difficult, increasing the maintenance complexity. Furthermore, the excessive length of the piston rod increases the overall machining difficulty, making it hard to guarantee precision and increasing costs. Assembly and maintenance require complete disassembly, which is inconvenient and increases production costs. Currently, there is no good solution to these problems.

[0003] In summary, the aforementioned problems in liquid-driven compressors have become urgent technical challenges that need to be addressed within the industry. Utility Model Content:

[0004] To overcome the shortcomings of the prior art, this utility model provides a liquid-driven compressor structure that facilitates maintenance, solving the problem of the difficulty in lifting the entire liquid-driven compressor out for maintenance in the past.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0006] A maintenance-friendly hydraulic compressor structure includes a cylinder, a connecting sleeve, and a hydraulic cylinder. The hydraulic cylinder contains an oil piston, and the cylinder contains a pneumatic piston. The oil piston is connected to the piston rod of the oil cylinder, and the pneumatic piston is connected to the piston rod of the air cylinder. The piston rods of the oil cylinder and the air cylinder are connected within the connecting sleeve via a split coupling. The connecting sleeve has a split structure, including an upper connecting sleeve and a lower connecting sleeve. The flanges at both ends of the upper and lower connecting sleeves are fixedly connected to the cylinder and the hydraulic cylinder respectively by several bolts. The joints of the upper and lower connecting sleeves are fitted together.

[0007] The split coupling includes a pneumatic cylinder coupling and a hydraulic cylinder coupling. The pneumatic cylinder coupling is fixedly connected to the pneumatic cylinder piston rod, and the hydraulic cylinder coupling is fixedly connected to the hydraulic cylinder piston rod. The pneumatic cylinder coupling and the hydraulic cylinder coupling are fixedly connected by several bolts.

[0008] The connecting tube is split along an inclined plane from one end to the other.

[0009] An oil scraper ring that mates with the piston rod of the hydraulic cylinder is installed inside the receiving cylinder near the hydraulic cylinder.

[0010] The length of the connecting cylinder is greater than the stroke of the oil piston.

[0011] The top of the receiving tube is provided with a vent hole, and the bottom of the receiving tube is provided with an oil drain hole.

[0012] The cylinder piston rod and the piston are connected by a super nut.

[0013] The number of cylinders is one or two.

[0014] The present invention adopts the above solution and has the following advantages:

[0015] By designing the connecting sleeve as a split structure, and dividing the piston rod into a hydraulic cylinder piston rod and a pneumatic cylinder piston rod, which are connected within the connecting sleeve by a split coupling, maintenance can be performed by simply removing the upper half of the connecting sleeve and disconnecting the split coupling to disassemble the cylinder or hydraulic cylinder individually. This reduces disassembly difficulty and improves work efficiency, making it suitable for compact compressor skids with limited disassembly space. Furthermore, the piston rod does not need to be forged as a single piece, reducing the length of each piston rod and ensuring higher machining precision. This avoids the problem of reduced seal lifespan caused by low piston rod machining precision. Attached image description:

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0017] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0018] Figure 3 This is a schematic diagram of the cross-sectional structure of the connector of this utility model.

[0019] In the diagram, 1 is the cylinder, 2 is the connecting sleeve, 3 is the hydraulic cylinder, 4 is the oil piston, 5 is the air piston, 6 is the oil cylinder piston rod, 7 is the air cylinder piston rod, 8 is the upper connecting sleeve, 9 is the lower connecting sleeve, 10 is the cylinder coupling, 11 is the oil cylinder coupling, 12 is the oil scraper ring, 13 is the vent hole, 14 is the oil drain hole, and 15 is the super nut. Detailed implementation method:

[0020] To clearly illustrate the technical features of this solution, the present invention will be described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0021] like Figure 1-3As shown, a hydraulically driven compressor structure that facilitates maintenance includes a cylinder 1, a connecting cylinder 2, and a hydraulic cylinder 3. The hydraulic cylinder 3 contains an oil piston 4, and the cylinder 1 contains a pneumatic piston 5. The oil piston 4 is connected to an oil cylinder piston rod 6, and the pneumatic piston 5 is connected to an oil cylinder piston rod 7. The oil cylinder piston rod 6 and the pneumatic cylinder piston rod 7 are connected within the connecting cylinder 2 via a split coupling. The connecting cylinder 2 has a split structure, including an upper connecting cylinder 8 and a lower connecting cylinder 9. The flanges at both ends of the upper connecting cylinder 8 and the lower connecting cylinder 9 are fixedly connected to the cylinder 1 and the hydraulic cylinder 3 respectively by several bolts. The joints of the upper connecting cylinder 8 and the lower connecting cylinder 9 are fitted together.

[0022] The split coupling includes a cylinder coupling 10 and a hydraulic coupling 11. The cylinder coupling 10 is fixedly connected to the cylinder piston rod 7, and the hydraulic coupling 11 is fixedly connected to the hydraulic piston rod 6. The cylinder coupling 10 and the hydraulic coupling 11 are fixedly connected by several bolts. After the bolts are removed, the cylinder coupling 10 and the hydraulic coupling 11 can be separated, thereby separating the hydraulic piston rod 6 from the cylinder piston rod 7. During maintenance, the cylinder 1 or the hydraulic cylinder 3 can be disassembled separately, reducing the difficulty of disassembly.

[0023] The connecting sleeve 2 is split along an inclined plane from one end to the other. This design is because the compressor skid only has maintenance space on the front side, and no maintenance space on the rear side and the top. Therefore, the connecting sleeve 2 is split at an incline, with the upper half connecting sleeve 8 being the front and top side, and the lower half connecting sleeve 9 being the rear and bottom side. After the upper half connecting sleeve 8 is removed, the front and top side spaces are completely exposed, which makes it easier to disassemble the bolts of the split coupling.

[0024] An oil scraper ring 12, which cooperates with the piston rod 6 of the oil cylinder, is installed inside the receiving cylinder 2 near the hydraulic cylinder 3. It can scrape away most of the leaked hydraulic oil and prevent hydraulic oil from entering the cylinder 1 and contaminating the compressed gas.

[0025] The length of the connecting sleeve 2 is greater than the stroke of the oil piston 4, which ensures that the hydraulic oil at all parts of the oil cylinder piston rod 6 is scraped off, avoiding the situation where it cannot be scraped off.

[0026] The top of the connecting cylinder 2 is provided with a vent hole 13, and the bottom of the connecting cylinder 2 is provided with an oil drain hole 14. The vent hole 13 and the oil drain hole 14 can be opened periodically to discharge the hydraulic oil in the connecting cylinder 2 and let it flow back to the oil tank.

[0027] The cylinder piston rod 7 is connected to the piston 5 via a super nut 15, which allows the nut to be embedded inside the piston 5, making the end face of the entire piston 5 flat, thus simplifying the structural design of the cylinder head.

[0028] The number of cylinders 1 can be one or two. One cylinder 1 is a single-stage liquid-driven compressor, and two cylinders 1 are a two-stage liquid-driven compressor.

[0029] Working principle:

[0030] When the oil piston 4 in the hydraulic cylinder 3 reciprocates, it sequentially drives the air piston 5 in the cylinder 1 to reciprocate via the oil cylinder piston rod 6, the split coupling, and the air cylinder piston rod 7, thereby pressurizing the gas. When maintenance is required, simply remove the bolts at both ends of the upper half-connector 8 from the air cylinder 1 and the hydraulic cylinder 3 respectively, then remove the upper half-connector 8, then disconnect the split coupling, and remove several bolts between the air cylinder coupling 10 and the oil cylinder coupling 11. This allows the oil cylinder piston rod 6 to be separated from the air cylinder piston rod 7, and then the air cylinder 1 or the hydraulic cylinder 3 can be disassembled individually as needed, reducing the difficulty of disassembly. This structure makes installation and disassembly in compressor skids where disassembly space is limited more convenient.

[0031] The above specific embodiments should not be construed as limiting the scope of protection of this utility model. For those skilled in the art, any alternative improvements or modifications made to the embodiments of this utility model shall fall within the scope of protection of this utility model.

[0032] Any aspects of this utility model not described in detail are known to those skilled in the art.

Claims

1. A liquid drive compressor structure facilitating maintenance, comprising a cylinder, a sleeve and a hydraulic cylinder, an oil piston is arranged in the hydraulic cylinder, and a gas piston is arranged in the cylinder, characterized in that: The oil piston is connected to the oil cylinder piston rod, and the air piston is connected to the air cylinder piston rod. The oil cylinder piston rod and the air cylinder piston rod are connected in the connecting sleeve by a split coupling. The connecting sleeve has a split structure, including an upper connecting sleeve and a lower connecting sleeve. The flanges at both ends of the upper and lower connecting sleeves are fixedly connected to the air cylinder and the hydraulic cylinder by several bolts, respectively. The joints of the upper and lower connecting sleeves are fitted together.

2. A liquid drive compressor structure facilitating maintenance according to claim 1, characterized in that: The split coupling includes a pneumatic cylinder coupling and a hydraulic cylinder coupling. The pneumatic cylinder coupling is fixedly connected to the pneumatic cylinder piston rod, and the hydraulic cylinder coupling is fixedly connected to the hydraulic cylinder piston rod. The pneumatic cylinder coupling and the hydraulic cylinder coupling are fixedly connected by several bolts.

3. A liquid drive compressor structure facilitating serviceability as claimed in claim 1 wherein: The connecting tube is split along an inclined plane from one end to the other.

4. A liquid-cooled compressor structure facilitating maintenance according to claim 1, characterized in that: An oil scraper ring that mates with the piston rod of the hydraulic cylinder is installed inside the receiving cylinder near the hydraulic cylinder.

5. A liquid-cooled compressor structure facilitating maintenance according to claim 1, characterized in that: The length of the connecting cylinder is greater than the stroke of the oil piston.

6. A liquid-cooled compressor structure facilitating maintenance according to claim 1, characterized in that: The top of the receiving tube is provided with a vent hole, and the bottom of the receiving tube is provided with an oil drain hole.

7. A liquid ring compressor structure facilitating maintenance according to claim 1, characterized in that: The cylinder piston rod and the piston are connected by a super nut.

8. A liquid-cooled compressor structure facilitating maintenance according to claim 1, characterized in that: The number of cylinders is one or two.

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