Oil supply preheating device of reciprocating compressor unit

Abstract

The utility model discloses an oil supply preheating device of a reciprocating compressor unit, which belongs to the technical field of natural gas compressors, and comprises an outer cylinder and an inner cylinder, the outer cylinder is sleeved outside the inner cylinder, the bottom of the outer cylinder and the bottom of the inner cylinder are fixedly connected with a sealing plate, the bottom of the sealing plate is communicated with an oil storage tank, and the oil storage tank is communicated with an oil inlet of the oil storage tank. The heat conduction plates and the heat collection pieces are arranged, the heat collection pieces conduct flue gas waste heat collected from flue gas to the heat conduction plates, the temperature of the inner barrel body rises due to the fact that the temperature of the heat conduction plates rises, the flue gas has the effect of increasing the temperature of the inner barrel body at the same time, flue gas waste heat can be effectively collected, and therefore the preheating efficiency is improved; the preheating effect can be enhanced; by arranging a liquid level sensing probe, when it is detected that the height of engine oil in the outer barrel is high, the controller controls the electromagnetic valve to reduce the flow of the engine oil, and therefore the height of the engine oil in the outer barrel is controlled to prevent overflowing.

Description

Technical Field

[0001] The utility model relates to the technical field of natural gas compressors, in particular to an oil supply preheating device for a reciprocating compressor unit. Background Art

[0002] A reciprocating natural gas compressor package is a system of multiple components used to compress natural gas for different industrial applications. These components include compressors, drive units, cooling systems, control systems, exhaust systems, and other auxiliary equipment. Electric motors and fuel-driven engines are the most common drive methods.

[0003] Natural gas compressors include moving parts such as cylinders. The parts that reciprocate or rotate in the cylinders and other moving parts and the connection positions need to be lubricated with lubricating oil to reduce the resistance coefficient of the friction surface. The unit needs a lot of lubricating oil for lubrication when working. In low temperature environment, the viscosity of the oil increases, resulting in poor lubrication effect and affecting the operation of the unit. At this time, the oil needs to be heated to reduce the viscosity of the oil. At present, the most commonly used method for heating oil is electric heating to heat the oil pipe. However, electric heating has three disadvantages. First, fuel-driven natural gas compressor units are usually used in remote well stations with poor surrounding supporting conditions. The electricity consumption of the equipment and facilities in the station usually relies on the power generation of small generators provided by the well station, and the power supply capacity is limited. For such well stations, the power consumption of the unit increases by about 20% after the electric heating of the lubricating oil is put into use, and the power consumption increases by 5,000 kWh per month in winter; second, the density of the electric heating wrapped around the oil pipe determines the heating effect, which is difficult to grasp. Too high oil temperature will cause oil deterioration, and too low oil temperature will not achieve the purpose of reducing viscosity; third, the process medium natural gas compressed by the unit is flammable and explosive. Using electric heating tape on the unit body can easily cause safety accidents in the event of leakage or sparks.

[0004] The existing oil supply lubrication structure utilizes the waste heat of flue gas to preheat the oil during use, which increases the heat exchange intensity, thereby greatly improving the preheating effect, while reducing electricity consumption and eliminating the safety hazards of electric heating. However, the prior art has the problem of simple heat exchange form and limited electric heating power, which cannot effectively heat the lubricating oil, resulting in low preheating efficiency and poor effect. Utility Model Content

[0005] The utility model aims to solve at least one of the technical problems existing in the prior art.

[0006] To this end, one purpose of the utility model is to propose an oil supply preheating device for a reciprocating compressor unit, which can effectively collect the waste heat of the flue gas, thereby improving the preheating efficiency and helping to enhance the preheating effect; the solenoid valve can be controlled by a controller to reduce the flow of oil entering the engine oil, thereby controlling the height of the engine oil in the outer cylinder to prevent overflow.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an oil supply preheating device for a reciprocating compressor unit, comprising an outer cylinder and an inner cylinder, the outer cylinder is sleeved on the outside of the inner cylinder, a sealing plate is fixedly connected to the bottom of the outer cylinder and the inner cylinder, the bottom of the sealing plate is connected to an oil storage tank, the bottom of the oil storage tank is connected to an oil outlet pipe, the inside of the inner cylinder is fixedly connected to a bottom plate, the outside of the bottom plate is connected to an air outlet pipe, a plurality of heat conduction plates are fixedly connected to the inner circumference of the inner cylinder at equal intervals, and the heat conduction plates are fixedly connected to the inner circumference of the inner cylinder. A plurality of heat collecting sheets are fixedly connected to the outside of the plate, a plurality of heat conducting sheets are fixedly connected to the inside of the outer cylinder, a plurality of through holes are opened inside the heat conducting sheets, a liquid level control mechanism is installed on the outside of the outer cylinder, a filtering mechanism is installed inside the inner cylinder, a cover body is fixedly connected to the inner cylinder by bolts, an air inlet pipe is connected to the cover body, an oil inlet pipe is fixedly connected to the cover body, both ends of the oil inlet pipe pass through the bottom of the cover body and are located between the outer cylinder and the inner cylinder, and the oil inlet pipe is connected to an oil delivery connecting pipe.

[0008] Preferably, the liquid level control mechanism includes a liquid level sensor probe, which is installed inside the outer cylinder body, and a controller is installed outside the outer cylinder body. The liquid level sensor probe is signal-connected to the controller, and an electromagnetic valve is installed outside the oil connecting pipe, and the electrical control end of the controller is electrically connected to the electrical control output end of the electromagnetic valve.

[0009] Preferably, a sealing ring is fixedly connected to the bottom of the cover body, and the sealing ring is inserted between the outer cylinder and the inner cylinder.

[0010] Preferably, a breathing valve is installed on the outside of the outer cylinder, and the breathing valve is located above the liquid level sensor probe.

[0011] Preferably, the filtering mechanism comprises a placement rack, the placement rack is fixedly connected to the interior of the inner cylinder, and a filtering layer is installed on the placement rack.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model arranges a heat conducting plate and a heat collecting sheet. The heat collecting sheet collects the waste heat of the flue gas and conducts it to the heat conducting plate. The temperature increase of the multiple heat conducting plates increases the temperature of the inner cylinder. The flue gas also has the function of increasing the temperature of the inner cylinder. The waste heat of the flue gas can be effectively collected, thereby improving the preheating efficiency and being beneficial to strengthening the preheating effect. Furthermore, by arranging a liquid level sensor probe, when it is detected that the oil height in the outer cylinder is high, the solenoid valve is controlled by the controller to reduce the flow rate of the oil entering, thereby controlling the oil height in the outer cylinder to prevent overflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the oil supply preheating device of the reciprocating compressor unit of the utility model;

[0015] Figure 2 It is a structural schematic diagram of the bottom plate in the oil supply preheating device of the reciprocating compressor unit of the utility model;

[0016] Figure 3 It is a schematic cross-sectional structural diagram of the outer cylinder in the oil supply preheating device of the reciprocating compressor unit of the utility model;

[0017] Figure 4 It is a structural schematic diagram of a heat conducting plate in an oil supply preheating device for a reciprocating compressor unit of the utility model;

[0018] Figure 5 The utility model is a schematic diagram of the structure of the oil storage tank in the oil supply preheating device of the reciprocating compressor unit.

[0019] In the figure: 1. outer cylinder; 2. cover; 3. air inlet pipe; 4. oil inlet pipe; 5. oil transfer connecting pipe; 6. solenoid valve; 7. oil storage tank; 8. controller; 9. breathing valve; 10. oil outlet pipe; 11. placement rack; 12. filter layer; 13. liquid level sensor probe; 14. heat conductive sheet; 15. heat conductive plate; 16. heat collecting sheet; 17. through hole; 18. bottom plate; 19. inner cylinder; 20. air outlet pipe; 21. sealing ring; 22. sealing plate. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-Figure 5The embodiment of the utility model provides an oil supply preheating device for a reciprocating compressor unit, comprising: an outer cylinder 1 and an inner cylinder 19, the outer cylinder 1 is sleeved on the outside of the inner cylinder 19, a sealing plate 22 is fixedly connected between the outer cylinder 1 and the bottom of the inner cylinder 19, the bottom of the sealing plate 22 is connected to an oil storage tank 7, the bottom of the oil storage tank 7 is connected to an oil outlet pipe 10, the inside of the inner cylinder 19 is fixedly connected to a bottom plate 18, the outside of the bottom plate 18 is connected to an air outlet pipe 20, a plurality of heat conducting plates 15 are fixedly connected to the inner circumference of the inner cylinder 19 at equal intervals, and the heat conducting plates The outside of 15 is fixedly connected with a plurality of heat collecting plates 16, the inside of the outer cylinder 1 is fixedly connected with a plurality of heat conducting plates 14, the inside of the heat conducting plates 14 is provided with a plurality of through holes 17, the outside of the outer cylinder 1 is installed with a liquid level control mechanism, the inside of the inner cylinder 19 is installed with a filtering mechanism, the inner cylinder 19 is fixedly connected with a cover body 2 by bolts, the cover body 2 is connected with an air inlet pipe 3, the cover body 2 is fixedly connected with an oil inlet pipe 4, both ends of the oil inlet pipe 4 pass through the bottom of the cover body 2 and are located between the outer cylinder 1 and the inner cylinder 19, and the oil inlet pipe 4 is connected with an oil delivery connecting pipe 5.

[0022] The liquid level control mechanism includes a liquid level sensor probe 13, which is installed inside the outer cylinder 1. A controller 8 is installed outside the outer cylinder 1. The liquid level sensor probe 13 is signal-connected to the controller 8. An electromagnetic valve 6 is installed outside the oil delivery connecting pipe 5. The electrical control end of the controller 8 is electrically connected to the electrical control output end of the electromagnetic valve 6.

[0023] The filter mechanism includes a placement frame 11, which is fixedly connected to the inside of the inner cylinder 19, and a filter layer 12 is installed on the placement frame 11. The smoke entering the inner cylinder 19 can be filtered to prevent excessive dust accumulation from affecting the heat collection effect.

[0024] When in use, the flue gas generated by the reciprocating natural gas compressor unit enters the inner cylinder 19 from the air inlet pipe 3, and the heat collecting plate 16 collects the flue gas and conducts the flue gas waste heat to the heat conducting plate 15. The temperature increase of multiple heat conducting plates 15 increases the temperature of the inner cylinder 19, and the flue gas also has the effect of increasing the temperature of the inner cylinder 19. The oil pressed from the oil delivery connecting pipe 5 by the oil injector enters the oil inlet pipe 4, and the oil inlet pipe 4 injects oil from both sides into the outer cylinder 1 and the inner cylinder 19. The temperature of the oil increases when passing through the heat conducting plate 14 and the outside of the inner cylinder 19, thereby preheating the oil supply system of the compressor unit and recycling the preheated flue gas. After passing through the heat conducting plate 15, the flue gas is discharged from the outlet pipe 20.

[0025] When the liquid level sensor probe 13 detects that the oil level in the outer cylinder 1 is high, the controller 8 controls the solenoid valve 6 to reduce the flow of the oil entering the outer cylinder 1, thereby controlling the oil level in the outer cylinder 1.

[0026] In order to prevent the cover body 2 from leaking, a sealing ring 21 is fixedly connected to the bottom of the cover body 2 , and the sealing ring 21 is inserted between the outer cylinder body 1 and the inner cylinder body 19 .

[0027] In order to prevent the liquid level from being too high and affecting the operation of the breathing valve 9 and to keep the gas discharged, a breathing valve 9 is installed outside the outer cylinder 1 , and the breathing valve 9 is located above the liquid level sensor probe 13 .

[0028] According to the above technical scheme, the working steps of this scheme are summarized and sorted out: when the utility model is in use, the flue gas generated by the reciprocating natural gas compressor unit enters the interior of the inner cylinder 19 from the air inlet pipe 3, and the heat collecting plate 16 collects the flue gas and conducts the flue gas waste heat to the heat conducting plate 15. The temperature increase of multiple heat conducting plates 15 increases the temperature of the inner cylinder 19, and the flue gas also has the effect of increasing the temperature of the inner cylinder 19; the oil pressed from the oil delivery connecting pipe 5 by the oil injector enters the oil inlet pipe 4, and the oil inlet pipe 4 injects the oil into the outer cylinder 1 and the inner cylinder 19 from both sides. The temperature of the oil increases when passing through the heat conducting plate 14 and the outside of the inner cylinder 19, thereby preheating the oil supply system of the compressor unit and recycling the preheating of the flue gas. After the flue gas passes through the heat conducting plate 15, it is discharged from the air outlet pipe 20. When the liquid level sensor probe 13 detects that the oil height in the outer cylinder 1 is high, the solenoid valve 6 is controlled by the controller 8 to reduce the flow of the oil entering, thereby controlling the height of the oil in the outer cylinder 1.

[0029] Parts not involved in the present invention are the same as the prior art or can be implemented by the prior art. Although the embodiments of the present invention have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. An oil preheating device for a reciprocating compressor unit, comprising an outer cylinder (1) and an inner cylinder (19), wherein the outer cylinder (1) is sleeved on the outside of the inner cylinder (19), and is characterized in that: A sealing plate (22) is fixedly connected between the outer cylinder (1) and the bottom of the inner cylinder (19); the bottom of the sealing plate (22) is connected to an oil storage tank (7); and the bottom of the oil storage tank (7) is connected to an oil outlet pipe (10); The interior of the inner cylinder (19) is fixedly connected to a bottom plate (18), and the exterior of the bottom plate (18) is connected to an air outlet pipe (20); The inner cylinder (19) has a plurality of heat-conducting plates (15) arranged equidistantly and fixedly connected thereto on its inner circumference, the outer portions of the heat-conducting plates (15) are fixedly connected thereto on their outer portions, the inner portions of the outer cylinder (1) are fixedly connected thereto on their inner portions on their inner portions on their inner portions on their inner portions on their inner portions on their inner portions on their inner portions on their inner portions on their outer ... A liquid level control mechanism is installed outside the outer cylinder (1), and a filtering mechanism is installed inside the inner cylinder (19); The inner cylinder (19) is fixedly connected to a cover body (2) by bolts, the cover body (2) is connected to an air inlet pipe (3), the cover body (2) is fixedly connected to an oil inlet pipe (4), both ends of the oil inlet pipe (4) pass through the bottom of the cover body (2) and are located between the outer cylinder (1) and the inner cylinder (19), and the oil inlet pipe (4) is connected to an oil delivery connecting pipe (5).

2. The oil preheating device for a reciprocating compressor unit according to claim 1, characterized in that: The liquid level control mechanism comprises a liquid level sensing probe (13), the liquid level sensing probe (13) being installed inside the outer cylinder (1), a controller (8) being installed outside the outer cylinder (1), the liquid level sensing probe (13) being signal-connected to the controller (8), an electromagnetic valve (6) being installed outside the oil delivery connecting pipe (5), an electrical control end of the controller (8) being electrically connected to an electrical control output end of the electromagnetic valve (6).

3. The oil preheating device for a reciprocating compressor unit according to claim 1, characterized in that: A sealing ring (21) is fixedly connected to the bottom of the cover body (2), and the sealing ring (21) is inserted between the outer cylinder body (1) and the inner cylinder body (19).

4. The oil preheating device for a reciprocating compressor unit according to claim 2, characterized in that: A breathing valve (9) is installed outside the outer cylinder (1), and the breathing valve (9) is located above the liquid level sensing probe (13).

5. The oil preheating device for a reciprocating compressor unit according to claim 1, characterized in that: The filtering mechanism comprises a placement frame (11), the placement frame (11) is fixedly connected to the inside of the inner cylinder (19), and a filtering layer (12) is installed on the placement frame (11).

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