Oil injection screw machine oil cylinder and oil content return pipe combined energy-saving device

Abstract

An oil injection screw machine oil cylinder and oil separation oil return pipe combined type energy-saving device comprises an oil gas cylinder, an air inlet is formed in the side face of the oil gas cylinder and communicated with an exhaust hole of a screw main machine through an exhaust pipe, an oil separation core is fixedly installed in an inner cavity of the oil gas cylinder, and a flow guide threaded connector is arranged in the center of the bottom of the oil separation core. A threaded connector is fixedly installed on the side wall of the oil gas cylinder, the two ends of the threaded connector are located on the inner side and the outer side of the oil gas cylinder respectively, the flow guide threaded connector is connected with one end of the threaded connector through an oil return pipe, and the other end of the threaded connector is connected with the liquid inlet end of the zero-gas-consumption oil discharging device through a pipeline. And the liquid outlet end of the zero-gas-consumption oil discharger is connected with an oil return port of the screw main machine through a pipeline. According to the utility model, the defects in the prior art are overcome, lubricating oil and compressed air can be effectively prevented from being pumped to the oil return port of the screw main engine together, and meanwhile, equipment faults caused by friction risks between the oil separation oil return pipe and the bottom of the oil separation core are avoided.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, specifically to an energy-saving device combining an oil-gas cylinder and an oil separator return pipe for an oil-injected screw compressor. Background Technology

[0002] Oil-injected screw compressors are essential industrial equipment in fields such as chemical engineering and steelmaking. The oil-gas separator and oil return system are crucial components of these compressors. The success of the oil return device design in the oil-gas separation system directly affects the oil content in the compressed air, thus impacting the safe operation and energy efficiency of the oil-injected screw compressor.

[0003] The existing oil-gas separation system of oil-injected screw compressor units mainly consists of an oil-gas separator, an oil separator core, and an oil separator core return device (see attached). Figure 1 (As shown). The oil-air mixture from the screw compressor exhaust port enters the oil-air cylinder. Its direction of motion is changed by cyclone separation, and through collision and gravity settling, most of the lubricating oil accumulates at the bottom of the oil-air cylinder. Compressed air containing a small amount of lubricating oil is intercepted by the oil separator core, allowing for sufficient filtration, condensation, separation, and recovery of the lubricating oil in the air. The recovered lubricating oil accumulates at the bottom of the oil separator core and is guided by the oil return device inserted in the core to the low-pressure section of the screw compressor intake port under the pressure difference, participating in the system's recirculation.

[0004] However, the aforementioned oil-gas separation system mixes excessive compressed air during the oil return process, resulting in significant compressed air waste and hindering energy-efficient unit operation. Furthermore, the oil return pipe, inserted from the oil-gas cylinder end cap into the oil collection groove at the bottom of the oil separator core, is a suspension rod prone to high-frequency micro-vibration under airflow disturbances. Over time, this can cause the oil return pipe to break at the root connection. Additionally, due to assembly errors, if the oil return pipe is too long, the end of the pipe can rub against the bottom of the oil separator core. This can cause minor friction perforation of the core, or even generate friction sparks that can ignite the lubricating oil in the oil-gas cylinder, leading to a flash explosion and posing a safety hazard. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a combined energy-saving device for an oil-air cylinder and an oil separator return pipe for an oil-injected screw compressor. This device overcomes the deficiencies of existing technologies, is reasonably designed, and can effectively prevent lubricating oil and compressed air from being drawn together to the return port of the screw compressor. It also avoids equipment failure caused by the risk of friction between the oil separator return pipe and the bottom of the oil separator core.

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

[0007] The energy-saving device in combination of the oil injection screw rod machine oil gas cylinder and oil separation oil return pipe comprises an oil gas cylinder, an air inlet is arranged on the side of the oil gas cylinder, the air inlet is connected with the exhaust hole of the screw rod host machine through an exhaust pipe, an oil separation core is fixedly installed in the inner cavity of the oil gas cylinder, a flow guide threaded joint is arranged at the bottom center of the oil separation core, a threaded joint is fixedly installed on the side wall of the oil gas cylinder, the two ends of the threaded joint are located on the inner side and the outer side of the oil gas cylinder respectively, the flow guide threaded joint is connected with one end of the threaded joint through an oil return pipe, the other end of the threaded joint is connected with the liquid inlet end of a zero consumption air exhaust oil device through a pipeline, and the liquid outlet end of the zero consumption air exhaust oil device is connected with the oil return port of the screw rod host machine through a pipeline.

[0008] Preferably, the height position of the threaded joint is lower than the height position of the flow guide threaded joint.

[0009] Preferably, an arc-shaped groove is arranged at the bottom of the inner cavity of the oil separation core, and the flow guide threaded joint is installed at the lowest end of the arc-shaped groove.

[0010] Preferably, the zero consumption air exhaust oil device comprises a liquid storage cavity, the top of the liquid storage cavity is provided with a liquid inlet, the bottom of the liquid storage cavity is provided with a liquid outlet, the threaded joint is connected with the liquid inlet through a pipeline, one end of the liquid outlet is connected with a liquid discharge pipe, the other end of the liquid discharge pipe is connected with the oil return port of the screw rod host machine through a pipeline, an electromagnetic valve is arranged on the liquid discharge pipe, a magnetic floating ball is arranged in the liquid storage cavity, the magnetic floating ball can float up and down according to the liquid level change of the oil liquid in the liquid storage cavity, an electromagnetic inductor is fixedly installed at the top of the liquid storage cavity, the electromagnetic inductor is connected with the electromagnetic valve through a signal line, and the electromagnetic inductor controls the electromagnetic valve to open when the magnetic floating ball is sensed; and the electromagnetic inductor controls the electromagnetic valve to close when the magnetic floating ball is not sensed.

[0011] Preferably, a one-way valve is arranged on the exhaust pipe, and the air inlet of the one-way valve is close to the exhaust port of the screw rod host machine.

[0012] The energy-saving device in combination of the oil injection screw rod machine oil gas cylinder and oil separation oil return pipe has the following beneficial effects: the lubricating oil accumulated at the bottom of the oil separation core can be rapidly and effectively recovered through the oil return pipe. The lubricating oil can be effectively prevented from being extracted together with the compressed air to the oil return port of the screw rod host machine through the zero consumption air exhaust oil device, so that the entire oil return pipeline only extracts the lubricating oil without wasting any compressed air, thereby achieving the energy-saving effect. Meanwhile, the friction risk between the oil return pipe and the bottom of the oil separation core can be effectively avoided to cause the equipment failure. The oil injection screw rod compressor system can be safely, stably, energy-savingly, environmentally-friendlyly and reliably operated. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical scheme of the present application or the prior art, the drawings needed to be used in the description of the prior art will be briefly introduced.

[0014] Figure 1 Structure diagram of prior art;

[0015] Figure 2 Structure diagram of the utility model;

[0016] Figure 3 Structure diagram of zero-gas consumption oil drain device in the utility model;

[0017] Mark explanation in the drawing:

[0018] 1, oil gas cylinder; 2, exhaust pipe; 3, screw main machine; 4, oil separation core; 5, flow guide threaded joint; 6, threaded joint; 7, oil return pipe; 8, zero-gas consumption oil drain device; 9, arc-shaped groove; 10, one-way valve; 81, liquid storage cavity; 82, liquid inlet; 83, liquid outlet; 84, liquid discharge pipe; 85, electromagnetic valve; 86, magnetic float; 87, electromagnetic inductor. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the utility model more clear, the technical scheme in the utility model will be described clearly and completely below by combining with the drawings in the utility model.

[0020] Example one, as Figures 2-3 shown, a kind of oil injection screw machine oil gas cylinder and oil separation oil return pipe combined energy-saving device, including oil gas cylinder 1, oil gas cylinder 1 side is provided with air inlet, air inlet is connected with the exhaust hole of screw main machine 3 by exhaust pipe 2, oil gas cylinder 1 inner chamber is fixedly installed with oil separation core 4, oil separation core 4 bottom center is provided with flow guide threaded joint 5, oil gas cylinder 1 side wall is fixedly installed with threaded joint 6, the both ends of threaded joint 6 are located at the inside and outside of oil gas cylinder 1 respectively, flow guide threaded joint 5 is connected with the one end of threaded joint 6 by oil return pipe 7, the other end of threaded joint 6 is connected with the liquid inlet end of zero-gas consumption oil drain device 8 by pipeline, the liquid outlet end of zero-gas consumption oil drain device 8 is connected with the oil return port of screw main machine 3 by pipeline.

[0021] Working principle:

[0022] In use, when the screw host 3 starts, the lubricating oil in the screw host 3 is sent into the oil-gas cylinder 1 through the exhaust pipe 2. In the oil-gas cylinder 1, most of the lubricating oil is gathered in the lower part of the oil-gas cylinder 1, and the compressed air containing a small amount of lubricating oil is intercepted by the oil separation core 4, so that the lubricating oil in the compressed air is fully filtered, separated and recovered, and the recovered lubricating oil is gathered at the bottom of the oil separation core 4 and then flows into the return oil pipe 7 through the flow guide threaded joint 5. The return oil pipe 7 guides the filtered lubricating oil to the threaded joint 6 and finally delivers it to the zero-waste air oil drain 8 through the pipeline. When the oil level in the zero-waste air oil drain 8 reaches the upper limit of the liquid level switch, the zero-waste air oil drain 8 is automatically opened to deliver the collected lubricating oil to the return oil port of the screw host 3, and when the oil level reaches the lower limit of the liquid level switch, the zero-waste air oil drain 8 is automatically closed to avoid the lubricating oil being sucked together with the compressed air to the return oil port of the screw host 3, thereby effectively ensuring that the entire return oil pipeline only sucks away the lubricating oil without wasting any compressed air, thereby achieving energy-saving effect.

[0023] In addition, in the utility model, the flow guide threaded joint 5 and the threaded joint 6 are arranged, so that the return oil pipe 7 is directly installed at the bottom of the oil separation core 4, thereby effectively avoiding the problems of single-arm suspension and friction with the bottom of the oil separation core caused by the return oil pipe 7, and the like, so that the oil injection screw compressor system can be safely, stably, energy-savingly, environmentally-friendlyly and reliably operated.

[0024] In the embodiment two, as a further preferred scheme of the embodiment one, the height position of the threaded joint 6 is lower than that of the flow guide threaded joint 5, so that the lubricating oil filtered and intercepted by the oil separation core 4 can be smoothly guided to the return oil pipe 7 by its own gravity, thereby ensuring smooth recovery of the lubricating oil.

[0025] In the embodiment three, as a further preferred scheme of the embodiment one, the bottom of the inner cavity of the oil separation core 4 is provided with an arc-shaped groove 9, and the flow guide threaded joint 5 is installed at the lowest end of the arc-shaped groove 9. The arc-shaped groove 9 is arranged to make the lubricating oil filtered and intercepted by the oil separation core 4 smoothly gather in the arc-shaped groove 9 and flow to the flow guide threaded joint 5, thereby further improving the lubricating oil recovery efficiency. In addition, the structural design of the arc-shaped groove 9 ensures that the lubricating oil does not cause excessive pressure to the oil separation core 4 during the gathering process, thereby prolonging the service life of the oil separation core.

[0026] In the fourth embodiment, as a further preferred solution of the first embodiment, the zero-air consumption oil drain device 8 comprises a liquid storage chamber 81, the top of which is provided with a liquid inlet 82, the bottom of which is provided with a liquid outlet 83, the threaded joint 6 is connected to the liquid inlet 82 through a pipeline, one end of the liquid outlet 83 is connected to a liquid drain pipe 84, the other end of the liquid drain pipe 84 is connected to the oil return port of the screw main machine 3 through a pipeline, the liquid drain pipe 84 is provided with an electromagnetic valve 85, the liquid storage chamber 81 is provided with a magnetic floating ball 86, the magnetic floating ball 86 can float up and down according to the change of the liquid level of the oil in the liquid storage chamber 81, the top of the liquid storage chamber 81 is fixedly provided with an electromagnetic inductor 87, the electromagnetic inductor 87 is connected to the electromagnetic valve 85 through a signal line, when the electromagnetic inductor 87 senses the magnetic floating ball 86, the electromagnetic valve 85 is controlled to be opened; when the electromagnetic inductor 87 does not sense the magnetic floating ball 86, the electromagnetic valve 85 is controlled to be closed. In this embodiment, the zero-air consumption oil drain device 8 can specifically adopt the technical solution of patent No. 202010477962.1 and patent name: electromagnetic liquid level control zero-air consumption drain device.

[0027] The working process is as follows: when the lubricating oil enters the liquid storage chamber 81 from the liquid inlet 82 through the pipeline, the liquid level in the liquid storage chamber 81 also rises, and the magnetic floating ball 86 also slowly rises with the liquid level, when the liquid level reaches a certain height, the magnetic floating ball 86 triggers the electromagnetic inductor 87, the electromagnetic inductor 87 sends a signal to the electromagnetic valve 85 through a signal line, the electromagnetic valve 85 is opened immediately, so that the lubricating oil in the liquid storage chamber 81 can flow out through the liquid drain pipe 84 and be returned to the oil return port of the screw main machine 3. At this time, the liquid level in the liquid storage chamber 81 also decreases; when the magnetic floating ball 86 drops to a certain position with the liquid level, it no longer triggers the electromagnetic inductor 87, the electromagnetic inductor 87 loses the induction of the magnetic floating ball 86, and the electromagnetic valve 85 is controlled to be closed to stop oil drainage. Thus, the mechanical and electrical control double insurance can be formed by cooperation of the magnetic floating ball 86 and the electromagnetic valve 85, so as to ensure that the compressed air will not leak while the condensed water is drained, and zero-air consumption drainage is achieved.

[0028] In the fifth embodiment, as a further preferred solution of the first embodiment, the air exhaust pipe 2 is provided with a one-way valve 10, the air inlet of the one-way valve 10 is close to the air outlet of the screw main machine 3. Thus, the one-way valve 10 can effectively prevent the lubricating oil in the air exhaust pipe 3 from flowing back to the screw main machine 3 when the screw main machine 3 is stopped, so as to avoid that the lubricating oil in the screw main machine 3 is too much, and further avoid the risk of liquid impact when the screw main machine 3 is started again.

[0029] The above examples are only used to illustrate the technical solutions of the present application, and are not intended to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can still be modified, or some technical features therein can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A combined energy-saving device for an oil-air compressor and an oil separator return pipe, characterized in that: The device includes an oil and gas cylinder (1), which has an air inlet on its side. The air inlet is connected to the exhaust port of the screw main unit (3) through an exhaust pipe (2). An oil separator core (4) is fixedly installed in the inner cavity of the oil and gas cylinder (1). A flow guide threaded connector (5) is provided at the bottom center of the oil separator core (4). A threaded connector (6) is fixedly installed on the side wall of the oil and gas cylinder (1). The two ends of the threaded connector (6) are located on the inner and outer sides of the oil and gas cylinder (1), respectively. The flow guide threaded connector (5) is connected to one end of the threaded connector (6) through a return oil pipe (7). The other end of the threaded connector (6) is connected to the liquid inlet of the zero-air-consumption oil drainer (8) through a pipeline. The liquid outlet of the zero-air-consumption oil drainer (8) is connected to the return oil port of the screw main unit (3) through a pipeline.

2. The energy-saving device combining an oil-air cylinder and an oil separator return pipe for an oil-injected screw compressor according to claim 1, characterized in that: The height of the threaded connector (6) is lower than that of the flow-guiding threaded connector (5).

3. The energy-saving device combining an oil-air cylinder and an oil separator return pipe for an oil-injected screw compressor according to claim 1, characterized in that: The bottom of the inner cavity of the oil separator core (4) is provided with an arc-shaped groove (9), and the flow guide threaded connector (5) is installed at the lowest end of the arc-shaped groove (9).

4. The energy-saving device combining an oil-air cylinder and an oil separator return pipe for an oil-injected screw compressor according to claim 1, characterized in that: The zero-air-consumption oil drainer (8) includes a liquid storage chamber (81), with an inlet (82) at the top and a drain outlet (83) at the bottom. A threaded connector (6) is connected to the inlet (82) via a pipe. The drain outlet (83) is connected to one end of a drain pipe (84), and the other end of the drain pipe (84) is connected to the return port of the screw compressor (3) via a pipe. A solenoid valve (85) is installed on the drain pipe (84). The liquid storage chamber (81)... The interior is equipped with a magnetic float (86), which can float up and down according to the change of oil level in the reservoir (81). An electromagnetic sensor (87) is fixedly installed on the top of the reservoir (81). The electromagnetic sensor (87) is connected to the solenoid valve (85) through a signal line. When the electromagnetic sensor (87) senses the magnetic float (86), it controls the solenoid valve (85) to open; when the electromagnetic sensor (87) does not sense the magnetic float (86), it controls the solenoid valve (85) to close.

5. The energy-saving device combining an oil-air cylinder and an oil separator return pipe for an oil-injected screw compressor according to claim 1, characterized in that: The exhaust pipe (2) is equipped with a one-way valve (10), and the air inlet of the one-way valve (10) is close to the exhaust port of the screw main unit (3).

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