Four-stage compression horizontal counter-acting compressor

Abstract

The invention relates to the technical field of compressors, and provides a four-stage compression horizontal counter-acting compressor which comprises a compressor body, multiple stages of heat exchange pipelines and multiple stages of gas-water separators. Wherein the first-stage cylinder body and the fourth-stage cylinder body are arranged on the first side of the compressor main body, the second-stage cylinder body and the third-stage cylinder body are arranged on the second side, the first-stage gas-water separator, the second-stage gas-water separator and the fourth-stage gas-water separator are arranged on the second side, and the third-stage gas-water According to the compressor, high integration and compact layout of all functional modules are achieved, the transmission path of gas between all stages is effectively shortened, external pipelines and connecting pieces are reduced, the integration level and the space utilization rate of the whole compressor are improved, and the whole compressor occupied area is remarkably reduced; due to the arrangement of four-stage compression, the compression ratio is smaller in distribution among stages, the temperature rise of each stage is effectively controlled, the total compression work is reduced, the compression efficiency is improved, the gas-water separation effect is improved, and the water content of finally discharged gas is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of compressors, and in particular to a four-stage compression horizontally opposed compressor. Background Art

[0002] Compressors, as a key piece of industrial equipment, are widely used in numerous fields, including petroleum, chemical engineering, metallurgy, and electric power, providing compressed gas power for various production processes. With the continuous advancement of industrial technology, performance requirements for compressors are also increasing, such as higher compression efficiency, improved stability, and a smaller footprint. High-performance compressors can improve energy efficiency and reduce production costs in the production process, playing a significant role in promoting efficient and green industrial production. Furthermore, the development of compressors has driven progress in related industries and promoted the upgrading and improvement of the entire industrial system.

[0003] Currently, compressors typically utilize a multi-stage compression structure to increase compression ratio and gas pressure. During the gas compression process, heat exchangers and gas-water separators are typically installed to control gas temperature and separate moisture. However, the cylinder layout of traditional compressors is relatively random, the placement of gas-water separators and heat exchange piping lacks systematicity, and the connections between components are complex, resulting in long gas transmission paths and the need for numerous external piping and connectors. Furthermore, most compressors utilize a relatively small number of stages, making it difficult to precisely distribute the compression ratio and control the temperature rise at each stage.

[0004] Traditional compressors suffer from poor space utilization and bulky overall units due to irrational cylinder layouts and poorly planned component placement. Furthermore, the long gas transmission path and numerous external piping connections increase airflow circuitry and resistance, reducing compression efficiency. Furthermore, the low number of compression stages results in a high compression ratio and high temperature rise per stage, which not only increases compression work but also easily leads to excessively high exhaust temperatures, shortening the lifespan of the compressor's internal components. Furthermore, the air-water separation effect is poor, resulting in a high water content in the exhaust gas. Summary of the Invention

[0005] In response to the problems of low compressor integration, large compression ratio and high temperature rise in related technologies, the present application provides a four-stage compression horizontal opposed compressor.

[0006] The present application provides a four-stage compression horizontal opposed compressor, which adopts the following technical solution: A four-stage compression horizontal opposed compressor, comprising: a compressor body having a first side and a second side opposite to each other, the compressor body including a centrally disposed crankshaft and connecting rod structure, a primary cylinder block and a fourth cylinder block disposed on the first side, and a secondary cylinder block and a tertiary cylinder block disposed on the second side; A multi-stage heat exchange pipeline and a multi-stage air-water separator, the multi-stage heat exchange pipeline includes a primary heat exchange pipeline, a secondary heat exchange pipeline, a tertiary heat exchange pipeline and a fourth-stage heat exchange pipeline, the multi-stage air-water separator includes a primary air-water separator, a secondary air-water separator, a tertiary air-water separator and a fourth-stage air-water separator; wherein the primary heat exchange pipeline is connected to the primary cylinder body and connected to the primary air-water separator located on the second side, and the primary air-water separator is connected to the secondary cylinder body; the secondary heat exchange pipeline is connected to the secondary cylinder body and connected to the secondary air-water separator located on the second side, and the secondary air-water separator is connected to the tertiary cylinder body; the tertiary heat exchange pipeline is connected to the tertiary cylinder body and connected to the tertiary air-water separator located on the first side, and the tertiary air-water separator is connected to the fourth-stage cylinder body; the fourth-stage heat exchange pipeline is connected to the fourth-stage cylinder body and connected to the fourth-stage air-water separator located on the second side.

[0007] By adopting the above technical solution, by arranging the first and fourth stage cylinder bodies on the first side of the compressor body, the second and third stage cylinder bodies on the second side, and combining the layout of arranging the first, second and fourth stage gas-water separators on the second side and the third stage gas-water separator on the first side, the space on both sides of the compressor body is cleverly utilized to achieve high integration and compact layout of various functional modules, effectively shortening the gas transmission path between the various stages, reducing external pipelines and connectors, improving the integration and space utilization of the whole machine, and thus significantly reducing the overall footprint of the compressor; at the same time, the four-stage compression setting makes the compression ratio more distributed between the various stages, the temperature rise of each stage is effectively controlled, the total compression work is reduced, the compression efficiency is improved, and the gas-water separation effect is improved, thereby reducing the water content of the final exhaust gas.

[0008] Optionally, the first-stage cylinder block and the fourth-stage cylinder block are symmetrically arranged with respect to the crankshaft connecting rod structure as are the second-stage cylinder block and the third-stage cylinder block.

[0009] The above-mentioned technical solution enables the compressor pistons to move in opposite directions, which can achieve better inertial force balance, effectively reduce the vibration and noise of the whole machine during operation, and improve the smoothness of operation; at the same time, this symmetrical arrangement provides favorable spatial conditions for the integrated and compact layout of multi-stage heat exchange pipelines and multi-stage gas-water separators, further improving the integration of the whole machine.

[0010] Optionally, the four-stage compression horizontal opposed compressor further comprises: The multi-stage safety valve includes a first-stage safety valve, a second-stage safety valve, a third-stage safety valve and a fourth-stage safety valve which are respectively arranged on the first-stage air-water separator, the second-stage air-water separator, the third-stage air-water separator and the fourth-stage air-water separator.

[0011] The above technical solution can automatically start pressure relief when the pressure of each stage of the gas-water separator exceeds the preset safety value, providing effective overpressure protection for each compression stage of the compressor, ensuring the safety and reliability of the compressor operation.

[0012] Optionally, the four-stage compression horizontal opposed compressor further comprises: The motor is connected to the crankshaft connecting rod structure in the compressor body through a coupling.

[0013] The above technical solution provides power to the compressor body through direct connection between the motor and the coupling. Compared with belt drive, it has higher transmission efficiency and stability, reduces energy loss, and has a more compact structure, easier maintenance and longer service life.

[0014] Optionally, the four-stage compression horizontal opposed compressor further comprises: An oil circuit system is used to deliver lubricating oil to the crankshaft connecting rod structure inside the compressor body.

[0015] The above technical solution can provide continuous and effective lubrication for the core moving parts of the compressor body, such as the crankshaft and connecting rod, reduce friction and wear, ensure the long-term stable operation of the compressor, and help dissipate heat.

[0016] Optionally, the oil circuit system includes an oil circuit integrated end cover arranged on the compressor body, an integrated oil pump arranged on the oil circuit integrated end cover, an oil heat exchange pipeline connected to the oil circuit integrated end cover, and an oil circuit distributor integrator connected to the oil heat exchange pipeline; wherein, the oil circuit integrated end cover is provided with an integrated overflow valve, an oil filter element, an oil heater and an oil drain device.

[0017] By adopting the above technical solution, multiple core components of the oil circuit, such as the oil pump, overflow valve, oil filter element, oil heater and oil drain device, are highly integrated on the oil circuit integrated end cover, and combined with the oil heat exchange pipeline and the oil circuit distributor integrator, a high degree of integration of oil circulation, filtration, cooling, pressure control, preheating and distribution is achieved, which greatly simplifies the pipeline connection of the oil circuit system, improves the compactness and reliability of the system, facilitates monitoring and maintenance, and ensures the cleanliness of the lubricating oil and the appropriate operating temperature.

[0018] Optionally, the four-stage compression horizontal opposed compressor further comprises: A cooling system is used to cool the multi-stage heat exchange pipeline, the first-stage cylinder block, the fourth-stage cylinder block, the second-stage cylinder block and the third-stage cylinder block of the compressor body, the oil circuit system and the motor.

[0019] The above technical solution can efficiently absorb the heat generated by various components of the compressor during operation, effectively control the temperature of the compressed gas at each level, the temperature of the cylinder body at each level, the lubricating oil temperature and the motor temperature, ensure the efficient and stable operation of the compressor within an appropriate temperature range, and extend the service life of related components.

[0020] Optionally, the cooling system includes: The main water inlet pipeline is connected in parallel with the secondary heat exchange pipeline inlet pipe, the primary heat exchange pipeline inlet pipe, the primary cylinder water inlet pipe, the secondary cylinder water inlet pipe, the tertiary cylinder water inlet pipe, the quaternary cylinder water inlet pipe and the oil heat exchange pipeline inlet pipe; The return water main pipeline is connected in parallel with the motor return pipe, the three-stage heat exchange pipe return pipe, the first-stage cylinder return pipe, the second-stage cylinder return pipe and the third-stage cylinder return pipe, and a return water flow regulating valve is provided on the return water main pipeline; wherein, the second-stage heat exchange pipe inlet pipe is connected in series with the fourth-stage heat exchange pipe inlet pipe, the motor inlet pipe and the motor return pipe in sequence, and the first-stage heat exchange pipe inlet pipe is connected in series with the third-stage heat exchange pipe inlet pipe and the third-stage heat exchange pipe return pipe in sequence.

[0021] By adopting the above technical solution and optimizing the parallel and series combinations of the cooling water pipelines, the cooling water is effectively distributed and utilized to each heat exchange unit and cooling unit, so that the same stream of cooling water can flow through multiple components that need to be cooled in sequence, reducing the total cooling water consumption; at the same time, the pipeline layout is simplified, the pipeline length and the number of joints are reduced, the integration and reliability of the cooling system are improved, and the return water flow regulating valve is used to achieve flexible regulation of the cooling water flow.

[0022] Optionally, the four-stage compression horizontal opposed compressor further comprises: The drainage system is used to discharge the water separated in the multi-stage gas-water separator and the water accumulated in the compressor body.

[0023] The above technical solution can timely and effectively discharge the condensed water separated in the gas-water separators at each level during the compression process and the water that may accumulate in the compressor cylinder, preventing the accumulated water from corroding the equipment or affecting the compression efficiency and gas quality, thereby ensuring the dry operation of the compressor.

[0024] Optionally, the drainage system includes: Drainage pipelines, including a primary air-water separator drainage pipeline connected to the bottom of the primary air-water separator, a secondary air-water separator drainage pipeline connected to the bottom of the secondary air-water separator, a tertiary air-water separator drainage pipeline connected to the bottom of the tertiary air-water separator, a tertiary air-water separator drainage pipeline connected to the bottom of the tertiary air-water separator, and a tertiary cylinder body drainage pipeline connected to the bottom of the tertiary cylinder body; Drain solenoid valves, including a second-stage air-water separator drain solenoid valve and a drain check valve provided on the first-stage air-water separator drain pipeline and the second-stage air-water separator drain pipeline, a third-stage air-water separator drain solenoid valve provided on the third-stage air-water separator drain pipeline, a fourth-stage air-water separator drain solenoid valve provided on the fourth-stage air-water separator drain pipeline, and a third-stage cylinder body drain solenoid valve provided on the third-stage cylinder body drain pipeline; The integrated drainage tank, together with the first-stage air-water separator drainage pipeline, the second-stage air-water separator drainage pipeline, the third-stage air-water separator drainage pipeline, the fourth-stage air-water separator drainage pipeline and the third-stage cylinder body drainage pipeline, is used to collect and process the discharged water.

[0025] The above technical solution realizes the automatic and controllable drainage of gas-water separators at all levels and specific cylinder bodies. The drainage one-way valve can effectively prevent the backflow of discharged liquid. By connecting all drainage pipes to the integrated drainage tank, the discharged condensed water can be collected and processed in a centralized manner, which simplifies drainage management, keeps the equipment operating environment clean, and improves the reliability and maintenance convenience of the drainage system.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. By arranging the first and fourth-stage cylinders on the first side of the compressor body and the second and third-stage cylinders on the second side, and combining the first, second, and fourth-stage gas-water separators on the second side and the third-stage gas-water separator on the first side, the space on both sides of the compressor body is cleverly utilized to achieve a highly integrated and compact layout of the functional modules. This effectively shortens the gas transmission path between the stages, reduces external piping and connectors, improves the overall integration and space utilization of the whole machine, and significantly reduces the overall footprint of the compressor. At the same time, the four-stage compression arrangement allows for a smaller compression ratio distribution between the stages, effectively controlling the temperature rise of each stage, reducing the total compression work, improving compression efficiency, and improving the gas-water separation effect, thereby reducing the water content of the final exhaust gas. 2. The compressor pistons move in opposite directions, achieving better inertial force balance, effectively reducing vibration and noise during operation, and improving operational stability. At the same time, this symmetrical arrangement provides favorable spatial conditions for the integrated and compact layout of multi-stage heat exchange piping and multi-stage gas-water separators, further improving the integration of the entire unit. 3. By optimizing the design of parallel and series combinations of cooling water pipelines, the cooling water is effectively distributed and utilized to each heat exchange unit and cooling unit, allowing the same stream of cooling water to flow through multiple components that need cooling in sequence, reducing the total cooling water consumption. At the same time, the pipeline layout is simplified, the pipeline length and the number of joints are reduced, the integration and reliability of the cooling system are improved, and the return water flow control valve is used to achieve flexible control of the cooling water flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 2 is a schematic structural diagram of a four-stage compression horizontally opposed compressor according to an embodiment of the present application; Figure 2 It is a structural diagram of the oil circuit system of an embodiment of the present application; Figure 3 is a schematic structural diagram of a cooling system according to an embodiment of the present application; Figure 4 It is a structural diagram of the drainage system of an embodiment of the present application.

[0028] Explanation of reference numerals: 10, motor; 10a, motor water inlet pipe; 10b, motor water return pipe; 11, coupling; 20, compressor body; 21, air intake filter; 31, primary heat exchange pipeline; 31a, primary heat exchange pipeline water inlet pipe; 31b, primary heat exchange pipeline return pipe; 32, secondary heat exchange pipeline; 32a, secondary heat exchange pipeline water inlet pipe; 32b, secondary heat exchange pipeline return pipe; 33, tertiary heat exchange pipeline; 33a, tertiary heat exchange pipeline water inlet pipe; 33b, tertiary heat exchange pipeline return pipe; 34, quaternary heat exchange pipeline; 34a, quaternary heat exchange pipeline Water inlet pipe; 34b, return pipe of the fourth-stage heat exchange pipeline; 41, first-stage air-water separator; 41a, first-stage safety valve; 42, second-stage air-water separator; 42a, second-stage safety valve; 43, third-stage air-water separator; 43a, third-stage safety valve; 44, fourth-stage air-water separator; 44a, fourth-stage safety valve; 50, oil system; 51, oil integrated end cover; 51a, integrated overflow valve; 51b, oil filter element; 52, integrated oil pump; 52a, oil filter inlet device; 53, oil heat exchange pipeline; 53a, oil heat exchange pipeline water inlet pipe; 53b, oil heat exchange pipeline return water Pipe; 54, oil distributor and manifold; 55, oil system control instrument; 56, oil heater; 57, oil drain device; 58, oil breather; 60, cooling system; 61, main water inlet pipe; 62, main water return pipe; 62a, return water flow regulating valve; 63a, first-stage cylinder water inlet pipe; 63b, first-stage cylinder water return pipe; 64a, second-stage cylinder water inlet pipe; 64b, second-stage cylinder water return pipe; 65a, third-stage cylinder water inlet pipe; 65b, third-stage cylinder water return pipe; 66a, fourth-stage cylinder water inlet pipe; 66b, fourth-stage cylinder water return pipe; 70. Drainage system; 71. First-stage air-water separator drainage pipeline; 71a. First-stage air-water separator drainage solenoid valve; 72. Second-stage air-water separator drainage pipeline; 72a. Second-stage air-water separator drainage solenoid valve; 72b. Drainage check valve; 73. Third-stage air-water separator drainage pipeline; 73a. Third-stage air-water separator drainage solenoid valve; 74. Fourth-stage air-water separator drainage pipeline; 74a. Fourth-stage air-water separator drainage solenoid valve; 75. Third-stage cylinder block drainage pipeline; 75a. Third-stage cylinder block drainage solenoid valve; 76. Integrated drainage tank; 80. Instrument control system. DETAILED DESCRIPTION

[0029] The following is combined with Figures 1 to 4 This application is described in further detail.

[0030] The embodiment of the present application discloses a four-stage compression horizontally opposed compressor. Figure 1 Schematic diagram of the structure of the four-stage compression horizontal opposed compressor of the embodiment of the present application. Figure 1The four-stage compression horizontal opposed compressor includes a motor 10, a coupling 11, a compressor body 20, an air intake filter 21, a multi-stage heat exchange pipeline (a primary heat exchange pipeline 31, a secondary heat exchange pipeline 32, a tertiary heat exchange pipeline 33 and a quaternary heat exchange pipeline 34), a multi-stage gas-water separator (a primary gas-water separator 41, a secondary gas-water separator 42, a tertiary gas-water separator 43 and a quaternary gas-water separator 44), a multi-stage safety valve (a primary safety valve 41a, a secondary safety valve 42a, a tertiary safety valve 43a and a quaternary safety valve 44a), an oil circuit system 50, a cooling system 60, a drainage system 70 and an instrument control system 80.

[0031] The motor 10 is efficiently connected to the compressor body 20 through the coupling 11, and is used to provide power for the compressor body 20. The air intake filter 21 is provided at the air intake end of the compressor body 20, and is used to filter the gas entering the compressor body 20 to ensure the cleanliness of the air source. The compressor body 20 adopts a horizontal opposing structure, and is internally provided with a crankshaft connecting rod structure connected to the motor 10 through the coupling 11, a primary cylinder block, a secondary cylinder block, a tertiary cylinder block, and a quaternary cylinder block, wherein the primary cylinder block and the quaternary cylinder block are located on the first side of the compressor body 20, and the secondary cylinder block and the tertiary cylinder block are located on the second side of the compressor body 20 and are symmetrically arranged with the primary cylinder block and the quaternary cylinder block relative to the crankshaft connecting rod structure.

[0032] The gas is compressed in multiple stages in the primary cylinder block, the secondary cylinder block, the tertiary cylinder block and the quaternary cylinder block of the compressor body and then processed in multiple stages.

[0033] Specifically, the gas is compressed in the first stage in the first cylinder of the compressor body 20. The first cylinder of the compressor body 20 is connected to the first heat exchange pipeline 31. The gas after the first stage compression enters the first gas-water separator 41 located on the second side of the compressor body 20 for gas-liquid separation after heat exchange through the first heat exchange pipeline 31. The first gas-water separator 41 is provided with a first safety valve 41a for overpressure protection. The first gas-water separator 41 is connected to the second cylinder of the compressor body 20. The separated gas enters the second cylinder of the compressor body 20 for the second stage compression.

[0034] The secondary cylinder body of the compressor main body 20 is connected to the secondary heat exchange pipeline 32. The gas compressed in the second stage enters the secondary gas-water separator 42 also located on the second side of the compressor main body 20 for gas-liquid separation after heat exchange through the curved secondary heat exchange pipeline 32 on the second side of the compressor main body 20. The secondary gas-water separator 42 is provided with a secondary safety valve 42a for protection. The secondary gas-water separator 42 is connected to the tertiary cylinder body of the compressor main body 20. The separated gas enters the tertiary cylinder body of the compressor main body 20 for the third stage compression.

[0035] The three-stage cylinder body of the compressor main body 20 is connected to the three-stage heat exchange pipeline 33. The gas after the third stage compression enters the three-stage gas-water separator 43 located on the first side of the compressor main body 20 for gas-liquid separation after heat exchange through the three-stage heat exchange pipeline 33. The three-stage gas-water separator 43 is provided with a three-stage safety valve 43a for overpressure protection. The three-stage gas-water separator 43 and the four-stage cylinder body of the compressor main body 20, and the separated gas enters the four-stage cylinder body of the compressor main body 20 for the fourth stage compression.

[0036] The four-stage cylinder body of the compressor body 20 is connected to the four-stage heat exchange pipeline 34. The gas compressed in the fourth stage enters the four-stage gas-water separator 44 located on the second side of the compressor body 20 for final gas-liquid separation after heat exchange through the four-stage heat exchange pipeline 34. The four-stage gas-water separator 44 is provided with a four-stage safety valve 44a for overpressure protection. The clean compressed gas after four-stage compression and treatment can be output.

[0037] The pistons of the four-stage horizontally opposed compressor of the present application have opposite directions of motion, which can achieve better inertial force balance and reduce vibration of the entire machine. The first and fourth stage cylinder blocks are arranged on the first side, and the second and third stage cylinder blocks are arranged on the second side. This symmetrical and staggered arrangement, while ensuring dynamic balance, provides favorable spatial conditions for the integration of subsequent multi-stage heat exchangers and multi-stage gas-water separators. By cleverly integrating the four-stage cylinder blocks (the first and fourth stages are on the first side, and the second and third stages are on the second side) with the crankshaft connecting rod structure, and arranging multi-stage heat exchange piping and multi-stage gas-water separators around them, space utilization is maximized. Each stage of the gas-water separator is arranged adjacent to the next stage cylinder block, and the heat exchange piping is cleverly arranged using the distance between the cylinder blocks arranged on different sides, so that space is effectively utilized.

[0038] The gas-water separators are cleverly placed on both sides. This staggered arrangement fully utilizes the available space on both sides of the four-stage horizontally opposed compressor, avoiding the congestion caused by concentrating all separators on one side and further improving space utilization. This arrangement makes the airflow path more linear, reducing circuitous paths and resistance. For example, the gas exiting the first-stage cylinder block undergoes primary heat exchange and separation before directly entering the second-stage cylinder block on the second side. The gas exiting the third-stage cylinder block undergoes third-stage heat exchange and separation before returning to the fourth-stage cylinder block on the first side. This design effectively completes the multi-stage compression, cooling, and gas-water separation cycle within a limited space.

[0039] This structure also enables four-stage compression, resulting in a more even distribution of compression ratios between stages and a lower temperature rise within each stage. Heat exchangers are installed between each stage (stages 1, 2, 3, and 4) to reduce the gas temperature to near its initial temperature, thereby lowering the starting temperature for the next stage and reducing the compression work. Four-stage compression more effectively controls the temperature rise within each stage than three-stage compression (or fewer stages), bringing the overall compression process closer to an ideal isothermal process. This significantly reduces the total compression work and improves the compressor's energy efficiency. The specific power can reach 13kW / m³ / min (better than 18kW / m³ / min for conventional imported models), while reducing shaft power by 34%. The final exhaust temperature is also significantly lower than that of three-stage compression. This lower exhaust temperature effectively protects the compressor's internal components. By effectively distributing the compression ratio across four stages (with exhaust temperatures ≤160°C, 150°C, 170°C, and 150°C, respectively), the high-temperature characteristics of the final stage of three-stage compression are avoided, effectively extending piston ring life. Furthermore, four-stage compression provides more opportunities for gas-water separation at different pressure stages. After each cooling stage, some of the water vapor in the gas condenses into liquid water, which is promptly discharged through the gas-water separator. Compared to three-stage compression, four-stage compression provides an additional cooling and separation opportunity, resulting in lower water content in the final exhaust gas. If the target discharge pressure is higher (such as medium pressure or even higher), four-stage compression can achieve the target pressure more smoothly and efficiently without requiring a large compression ratio in a single stage. If the target pressure is the same as three-stage compression, four-stage compression will have a greater efficiency margin.

[0040] In general, the compressor achieves a high degree of integration of functional modules through a horizontally opposed, symmetrically staggered cylinder layout, combined with near-source integration of multi-stage gas-water separators and reasonable arrangement of heat exchange pipelines, and clever use of the space on both sides of the compressor body. This greatly shortens the gas transmission path and reduces the number of external pipelines and connectors, thereby significantly improving the integration of the entire machine while ensuring efficient compression and gas-liquid separation, and reducing the compressor's occupied volume by more than 40% compared to traditional imported compressors.

[0041] At the same time, the compact, integrated layout of the compressor body 20, the multi-stage heat exchange piping, and the multi-stage gas-water separator enables four-stage compression. Through more refined compression ratio distribution and more frequent interstage cooling and gas-water separation, compression energy consumption is effectively reduced, exhaust temperature is controlled, gas dryness is improved, and the compressor's applicable pressure range is expanded. These combined advantages make four-stage compressors superior to three-stage compressors in terms of performance, reliability, and operating costs, making them particularly suitable for medium-pressure applications with strict requirements on efficiency and gas quality.

[0042] The oil circuit system 50 is used to deliver lubricating oil to the crankshaft connecting rod structure inside the compressor body 20 . Figure 2 Schematic diagram of the oil circuit system of the embodiment of the present application. Figure 2 The oil circuit system 50 includes an oil circuit integrated end cover 51 , an integrated oil pump 52 , an oil heat exchange pipeline 53 , an oil circuit distributor integrator 54 and an oil circuit system control instrument 55 .

[0043] The oil circuit integrated end cover 51 is provided on the compressor body 20 . The oil circuit integrated end cover 51 serves as the base of the oil circuit system 50 , integrating multiple oil circuit components inside or on its surface, thereby greatly simplifying pipeline connections.

[0044] The integrated oil pump 52, mounted on the oil circuit integrated end cap 51, draws lubricating oil from the oil tank and pressurizes it for delivery to the circulating oil circuit. The integrated oil pump 52 is connected to the oil tank via a filter inlet device 52a, which performs preliminary filtration on the lubricating oil entering the integrated oil pump 52, removing larger particles and impurities to protect the integrated oil pump 52.

[0045] The integrated oil circuit cover 51 is equipped with an integrated relief valve 51a and an oil filter 51b. The integrated relief valve 51a monitors and controls the pressure of the circulating oil circuit. When the pressure exceeds a set value, the integrated relief valve 51a automatically opens, returning excess lubricating oil to the lubricating oil tank, thereby maintaining the oil circuit system 50 within a safe and stable operating pressure range. The oil filter 51b filters the lubricating oil more precisely, removing tiny impurities, metal shavings, and oxides, ensuring that the oil entering the lubrication points is highly clean and minimizing wear on moving parts.

[0046] The oil heat exchange line 53 is connected to the oil circuit integrated end cap 51 and is used to exchange heat with the lubricating oil filtered by the oil filter element 51b (the lubricating oil absorbs heat during circulation). The oil heat exchange line 53 is connected to the cooling system 60, allowing the filtered lubricating oil to exchange heat with cooling water, reducing the lubricating oil temperature to a suitable operating range, preventing oxidation and deterioration of the oil due to high temperature, and maintaining its lubricating properties.

[0047] The oil distributor and manifold 54 is connected to the oil heat exchange pipeline 53 and is used to distribute filtered and cooled lubricating oil to various parts of the crankshaft and connecting rod structure within the compressor body 20 that require lubrication (e.g., the crankshaft, connecting rod, crosshead, etc.). An oil system control instrument 55 is installed on the oil distributor and manifold 54. This oil system control instrument 55 is used to monitor various key parameters of the oil system 50 (e.g., oil pressure, oil temperature, oil level, etc.) in real time. This data is transmitted to the instrument control system 80 for analysis and display. If an abnormality occurs, the instrument control system 80 will issue an alarm or take appropriate protective measures (e.g., shutdown) to ensure the safe operation of the oil system 50 and the entire compressor.

[0048] Optionally, the oil system 50 also includes an oil heater 56, an oil drain device 57, and an oil breather 58, mounted on the compressor body 20. The oil heater 56 is used to preheat the lubricating oil in a low-temperature environment to ensure fluidity when the compressor starts. The oil drain device 57 is used to replace the lubricating oil, ensuring regular replacement of the lubricating oil and ensuring system cleanliness. The oil breather 58 balances the air pressure inside and outside the oil tank, preventing oil and air from mixing, and filters the air entering the tank.

[0049] The cooling system 60 is used to efficiently absorb the heat generated during the operation of the compressor, ensuring the temperature stability of each level of compression and the oil circuit system 50. Figure 3 Schematic diagram of the cooling system of the embodiment of the present application. Figure 3 The cooling system 60 includes a main water inlet pipe 61, a main water return pipe 62, a multi-stage heat exchange cooling pipe, a multi-stage cylinder cooling pipe, an oil heat exchange cooling pipe, and a motor cooling pipe. The main water inlet pipe 61 is used to introduce cooling water into the cooling system 60, and the main water return pipe is used to discharge the cooling water after absorbing heat.

[0050] The multi-stage heat exchange cooling pipeline includes a first-stage heat exchange pipeline inlet pipe 31a and a first-stage heat exchange pipeline return pipe 31b connected to the first-stage heat exchange pipeline 31, a second-stage heat exchange pipeline inlet pipe 32a and a second-stage heat exchange pipeline return pipe 32b connected to the second-stage heat exchange pipeline 32, a third-stage heat exchange pipeline inlet pipe 33a and a third-stage heat exchange pipeline return pipe 33b connected to the third-stage heat exchange pipeline 33, and a fourth-stage heat exchange pipeline inlet pipe 34a and a fourth-stage heat exchange pipeline return pipe 34b connected to the fourth-stage heat exchange pipeline 34.

[0051] The multi-stage cylinder block cooling pipeline includes a first-stage cylinder block water inlet pipe 63a and a first-stage cylinder block return pipe 63b connected to the first-stage cylinder block, a second-stage cylinder block water inlet pipe 64a and a second-stage cylinder block return pipe 64b connected to the second-stage cylinder block, a third-stage cylinder block water inlet pipe 65a and a third-stage cylinder block return pipe 65b connected to the third-stage cylinder block, and a fourth-stage cylinder block water inlet pipe 66a and a fourth-stage cylinder block return pipe 66b connected to the fourth-stage cylinder block.

[0052] The oil heat exchange cooling pipeline includes an oil heat exchange pipeline water inlet pipe 53a and an oil heat exchange pipeline water return pipe 53b connected to the oil heat exchange pipeline 53. The motor cooling pipeline includes a motor water inlet pipe 10a and a motor water return pipe 10b connected to the motor 10.

[0053] The secondary heat exchange pipeline inlet pipe 32a, the primary heat exchange pipeline inlet pipe 31a, the primary cylinder inlet pipe 63a, the secondary cylinder inlet pipe 64a, the tertiary cylinder inlet pipe 65a, the quaternary cylinder inlet pipe 66a, and the oil heat exchange pipeline inlet pipe 53a are connected in parallel to the main water inlet pipe 61. The motor return pipe 10b, the tertiary heat exchange pipeline return pipe 33b, the primary cylinder return pipe 63b, the secondary cylinder return pipe 64b, and the tertiary cylinder return pipe 65b are connected in parallel to the main water return pipe 62. A return water flow regulating valve 62a is also provided on the main water return pipe 62. The secondary heat exchange pipeline inlet pipe 32a, the quaternary heat exchange pipeline inlet pipe 34a, the motor water inlet pipe 10a, and the motor return pipe 10b are sequentially connected in series to share a cooling pipeline. The primary heat exchange pipeline inlet pipe 31a, the tertiary heat exchange pipeline inlet pipe 33a, and the tertiary heat exchange pipeline return pipe 33b are sequentially connected in series to share a cooling pipeline. This series design allows cooling water to be "multi-purposed at one level," meaning that the same stream of cooling water can flow sequentially through multiple components that require cooling, thereby reducing overall cooling water consumption. By combining partial series and then parallel connections, while meeting cooling requirements, the pipeline layout is optimized, the pipeline length and the number of joints are reduced, and the system's integration and reliability are further improved.

[0054] The drainage system 70 is used to discharge moisture generated during the gas compression process to prevent accumulated water from corroding the equipment or affecting the compression efficiency. Figure 4 Schematic diagram of the structure of the drainage system of the embodiment of the present application. Figure 4 The drainage system 70 includes a drainage pipeline, a drainage solenoid valve arranged on the drainage pipeline, and an integrated drainage tank 76 for integrating the drainage pipeline.

[0055] The drainage pipeline includes a first-stage air-water separator drainage pipeline 71 connected to the bottom of the first-stage air-water separator 41, a second-stage air-water separator drainage pipeline 72 connected to the bottom of the second-stage air-water separator 42, a third-stage air-water separator drainage pipeline 73 connected to the bottom of the third-stage air-water separator 43, a fourth-stage air-water separator drainage pipeline 74 connected to the bottom of the fourth-stage air-water separator 44, and a third-stage cylinder body drainage pipeline 75 connected to the bottom of the third-stage cylinder body.

[0056] The drain solenoid valves include a first-stage gas-water separator drain solenoid valve 71a provided on the first-stage gas-water separator drain line 71, a second-stage gas-water separator drain solenoid valve 72a provided on the second-stage gas-water separator drain line 72, a third-stage gas-water separator drain solenoid valve 73a provided on the third-stage gas-water separator drain line 73, a fourth-stage gas-water separator drain solenoid valve 74a provided on the fourth-stage gas-water separator drain line 74, and a third-stage cylinder body drain solenoid valve 75a provided on the third-stage cylinder body drain line 75. The first-stage gas-water separator drain solenoid valve 71a, the second-stage gas-water separator drain solenoid valve 72a, the third-stage gas-water separator drain solenoid valve 73a, and the fourth-stage gas-water separator drain solenoid valve 74a are used to control the discharge of separated water from each stage of the gas-water separator. The third-stage cylinder body drain solenoid valve 75a is used to control the discharge of any accumulated water at the bottom of the third-stage cylinder body to ensure dryness inside the cylinder. Optionally, the secondary gas-water separator drainage pipeline 72 is further provided with a drainage one-way valve 72b to prevent liquid backflow.

[0057] The integrated drainage tank 76 is used to collect the first-level air-water separator drainage pipeline 71, the second-level air-water separator drainage pipeline 72, the third-level air-water separator drainage pipeline 73, the fourth-level air-water separator drainage pipeline 74 and the third-level cylinder body drainage pipeline 75, so as to facilitate the centralized collection and treatment of the discharged condensed water.

[0058] The instrumentation control system 80 is used to monitor, control, and optimize the operation of the entire compressor. Connected to the oil system control instrument 55 and other sensors (such as pressure and temperature sensors) in the oil system 50, the instrumentation control system 80 acquires real-time equipment operating data and monitors key parameters such as pressure, temperature, oil temperature, oil pressure, and cooling water flow. Based on set operating parameters, the instrumentation control system 80 automatically adjusts the speed of the motor 10 (in conjunction with a variable frequency drive control system), various valves (such as the first-stage air-water separator drain solenoid valve 71a, the second-stage air-water separator drain solenoid valve 72a, the third-stage air-water separator drain solenoid valve 73a, the fourth-stage air-water separator drain solenoid valve 74a, and the third-stage cylinder drain solenoid valve 75a), and the oil heater 56, ensuring stable and efficient compressor operation. If abnormal parameters are detected (such as overpressure, overtemperature, or low oil pressure), the instrumentation control system 80 immediately initiates an alarm or shuts down the compressor to ensure the safety of equipment and personnel. In addition, the instrument control system 80 can also record operating data for fault diagnosis, performance optimization, and predictive maintenance. Furthermore, the instrument control system 80 can be integrated with the Internet of Things system to achieve remote monitoring, fault diagnosis, and data transmission, facilitating remote management and maintenance of the equipment.

[0059] The implementation principle of a four-stage compression horizontal opposed compressor in an embodiment of the present application is as follows: by arranging the first-stage cylinder body and the fourth-stage cylinder body on the first side of the compressor body 20, and the second-stage cylinder body and the third-stage cylinder body on the second side, and combining the layout of the first-stage air-water separator 41, the second-stage air-water separator 42 and the fourth-stage air-water separator 44 on the second side, and the third-stage air-water separator 43 on the first side, the space on both sides of the compressor body 20 is cleverly utilized to achieve high integration and compact layout of various functional modules, effectively shorten the gas transmission path between the various stages, reduce external pipelines and connectors, improve the integration and space utilization of the whole machine, thereby significantly reducing the overall footprint of the compressor; at the same time, the setting of four-stage compression makes the compression ratio more distributed between the various stages, the temperature rise of each stage is effectively controlled, the total compression work is reduced, the compression efficiency is improved, and the air-water separation effect is improved, and the water content of the final exhaust gas is reduced.

[0060] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A four-stage compression horizontal opposed compressor, characterized in that: include: A compressor body (20) having a first side and a second side opposite to each other, the compressor body (20) comprising a centrally arranged crankshaft connecting rod structure, a first-stage cylinder block and a fourth-stage cylinder block arranged on the first side, and a second-stage cylinder block and a third-stage cylinder block arranged on the second side; A multi-stage heat exchange pipeline and a multi-stage gas-water separator, wherein the multi-stage heat exchange pipeline comprises a first-stage heat exchange pipeline (31), a second-stage heat exchange pipeline (32), a third-stage heat exchange pipeline (33) and a fourth-stage heat exchange pipeline (34), and the multi-stage gas-water separator comprises a first-stage gas-water separator (41), a second-stage gas-water separator (42), a third-stage gas-water separator (43) and a fourth-stage gas-water separator (44); wherein the first-stage heat exchange pipeline (31) is connected to the first-stage cylinder body and is connected to the first-stage gas-water separator (41) located on the second side, and the first-stage gas-water separator (41) is connected to the second-stage gas-water separator (44). The second-stage heat exchange pipeline (32) is connected to the second-stage cylinder body and is connected to the second-stage air-water separator (42) located on the second side, and the second-stage air-water separator (42) is connected to the third-stage cylinder body; the third-stage heat exchange pipeline (33) is connected to the third-stage cylinder body and is connected to the third-stage air-water separator (43) located on the first side, and the third-stage air-water separator (43) is connected to the fourth-stage cylinder body; the fourth-stage heat exchange pipeline (34) is connected to the fourth-stage cylinder body and is connected to the fourth-stage air-water separator (44) located on the second side.

2. The four-stage compression horizontal opposed compressor according to claim 1, characterized in that: The first-stage cylinder block and the fourth-stage cylinder block are symmetrically arranged with respect to the crankshaft connecting rod structure as are the second-stage cylinder block and the third-stage cylinder block.

3. The four-stage compression horizontal opposed compressor according to claim 1, characterized in that: Also includes: The multi-stage safety valve comprises a first-stage safety valve (41a), a second-stage safety valve (42a), a third-stage safety valve (43a) and a fourth-stage safety valve (44a) respectively arranged on the first-stage air-water separator (41), the second-stage air-water separator (42), the third-stage air-water separator (43) and the fourth-stage air-water separator (44).

4. The four-stage compression horizontal opposed compressor according to claim 1, characterized in that: Also includes: The motor (10) is connected to the crankshaft connecting rod structure of the compressor body (20) via a coupling (11).

5. The four-stage compression horizontal opposed compressor according to claim 4, characterized in that: Also includes: An oil circuit system (50) is used to deliver lubricating oil to the crankshaft connecting rod structure inside the compressor body (20).

6. The four-stage compression horizontal opposed compressor according to claim 5, characterized in that: The oil circuit system (50) comprises an oil circuit integrated end cover (51) provided on the compressor body (20), an integrated oil pump (52) provided on the oil circuit integrated end cover (51), an oil heat exchange pipeline (53) connected to the oil circuit integrated end cover (51), and an oil circuit distributor integrator (54) connected to the oil heat exchange pipeline (53); wherein the oil circuit integrated end cover (51) is provided with an integrated overflow valve (51a), an oil filter element (51b), an oil heater (56), and an oil discharge device (57).

7. The four-stage compression horizontally opposed compressor according to claim 5, characterized in that: Also includes: A cooling system (60) is used to cool the multi-stage heat exchange pipeline, the first-stage cylinder block, the fourth-stage cylinder block, the second-stage cylinder block and the third-stage cylinder block of the compressor body (20), the oil circuit system (50) and the motor (10).

8. The four-stage compression horizontal opposed compressor according to claim 7, characterized in that: The cooling system (60) comprises: The water inlet main pipeline (61) is connected in parallel with a secondary heat exchange pipeline water inlet pipe (32a), a primary heat exchange pipeline water inlet pipe (31a), a primary cylinder water inlet pipe (63a), a secondary cylinder water inlet pipe (64a), a tertiary cylinder water inlet pipe (65a), a quaternary cylinder water inlet pipe (66a), and an oil heat exchange pipeline water inlet pipe (53a); The return water main pipeline (62) is connected in parallel with a motor return water pipe (10b), a tertiary heat exchange pipeline return water pipe (33b), a primary cylinder body return water pipe (63b), a secondary cylinder body return water pipe (64b), and a tertiary cylinder body return water pipe (65b), and a return water flow regulating valve (62a) is provided on the return water main pipeline (62); wherein the secondary heat exchange pipeline inlet pipe (32a) is connected in series with the quaternary heat exchange pipeline inlet pipe (34a), the motor inlet pipe (10a), and the motor return water pipe (10b), and the primary heat exchange pipeline inlet pipe (31a) is connected in series with the tertiary heat exchange pipeline inlet pipe (33a) and the tertiary heat exchange pipeline return water pipe (33b).

9. The four-stage compression horizontal opposed compressor according to claim 1, characterized in that: Also includes: The drainage system (70) is used to discharge the water separated in the multi-stage gas-water separator and the water accumulated in the compressor body (20).

10. The four-stage compression horizontal opposed compressor according to claim 9, characterized in that: The drainage system (70) comprises: Drainage pipelines include a primary air-water separator drainage pipeline (71) connected to the bottom of the primary air-water separator (41), a secondary air-water separator drainage pipeline (72) connected to the bottom of the secondary air-water separator (42), a tertiary air-water separator drainage pipeline (73) connected to the bottom of the tertiary air-water separator (43), a tertiary air-water separator drainage pipeline (74) connected to the bottom of the tertiary air-water separator (44), and a tertiary cylinder body drainage pipeline (75) connected to the bottom of the tertiary cylinder body; The drainage solenoid valve comprises a first-stage gas-water separator drainage solenoid valve (71a) provided on the first-stage gas-water separator drainage pipeline (71), a second-stage gas-water separator drainage solenoid valve (72a) and a drainage check valve (72b) provided on the second-stage gas-water separator drainage pipeline (72), a third-stage gas-water separator drainage solenoid valve (73a) provided on the third-stage gas-water separator drainage pipeline (73), a fourth-stage gas-water separator drainage solenoid valve (74a) provided on the fourth-stage gas-water separator drainage pipeline (74), and a third-stage cylinder body drainage solenoid valve (75a) provided on the third-stage cylinder body drainage pipeline (75); The integrated drainage tank (76) is connected with the first-stage air-water separator drainage pipeline (71), the second-stage air-water separator drainage pipeline (72), the third-stage air-water separator drainage pipeline (73), the fourth-stage air-water separator drainage pipeline (74) and the third-stage cylinder body drainage pipeline (75) to collect and process the discharged water.

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