Oil cut-off protection device for screw air compressor

Abstract

The utility model discloses an oil cut-off protection device for a screw air compressor, and particularly relates to the technical field of oil cut-off protection, which comprises an air filter air inlet system, the air outlet end of the air filter air inlet system is communicated with the air inlet end of a direct connection type main engine through a first connecting pipe, and the air outlet end of the direct connection type main engine is fixedly communicated with a second connecting pipe. The other end of the second connecting pipe fixedly communicates with the feeding end of an oil-gas separation barrel, a gas pump and a liquid pump are fixedly installed at the upper end of the oil-gas separation barrel and fixedly installed on a fourth connecting pipe and a third connecting pipe correspondingly, and one end of the third connecting pipe and one end of the fourth connecting pipe both penetrate through the upper end of the oil-gas separation barrel. And one end of the third connecting pipe extends to the bottom end in the oil-gas separation barrel. According to the oil-gas separation barrel, the self-alarm function can be achieved under the condition that the internal structure of the oil-gas separation barrel is not damaged, and therefore normal use of the oil-gas separation barrel is prevented from being affected by too high liquid level in the oil-gas separation barrel.

Description

Technical Field

[0001] The utility model relates to the technical field of oil cut-off protection, in particular to an oil cut-off protection device for a screw air compressor. Background Art

[0002] As market competition becomes increasingly fierce, customer needs are also constantly changing, and customers have higher requirements for the humanization and clarity of air compressors.

[0003] The authorized patent with application number: 202221815870.0 includes: an oil-gas separation barrel and an oil-break protection barrel; the oil-gas separation barrel and the oil-break protection barrel are connected to form a communicating vessel; a liquid level sensor is provided in the oil-break protection barrel, and the signal output end of the liquid level sensor is connected to an alarm device.

[0004] The above-mentioned comparative documents have the following problems:

[0005] If the oil-gas separation barrel is connected to the oil-break protection barrel, the oil-gas mixture entering the oil-gas separation barrel will also enter the oil-break protection barrel. This part of the oil-gas mixture will not be separated in the oil-break protection barrel, which will affect the oil-gas separation effect of the oil-gas separation barrel.

[0006] Therefore, we have made improvements to this problem and proposed an oil cut-off protection device for a screw air compressor. Utility Model Content

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0008] The utility model discloses an oil cut-off protection device for a screw air compressor, comprising an air filter inlet system, wherein an air outlet end of the air filter inlet system is connected to an air inlet end of a direct-connected main engine through a first connecting pipe, the air outlet end of the direct-connected main engine is fixedly connected to a second connecting pipe, the other end of the second connecting pipe is fixedly connected to a feed end of an oil-gas separation barrel, a gas pump and a liquid pump are fixedly mounted on the upper end of the oil-gas separation barrel, and the gas pump and the liquid pump are fixedly mounted on a fourth connecting pipe and a third connecting pipe, respectively, one end of each of the third connecting pipe and the fourth connecting pipe passes through the upper end of the oil-gas separation barrel, and one end of the third connecting pipe extends to the bottom end of the oil-gas separation barrel;

[0009] The other ends of the third connecting pipe and the fourth connecting pipe are fixedly connected to the feed ends of the oil cooler and the air cooler respectively.

[0010] As an optimal technical solution of the present invention, a detection box is fixedly installed on the upper end of the gas cooler, the fourth connecting pipe passes through the detection box, and a gas flow sensor is fixedly installed on the right end face inside the detection box. The sensing end of the gas flow sensor passes through the outer end of the fourth connecting pipe and extends to the inside of the fourth connecting pipe.

[0011] As a preferred technical solution of the present invention, the air cooler and the oil cooler are fixedly mounted on the front end face of the mounting back plate, and the controller and the alarm are fixedly mounted on the rear end face of the mounting back plate.

[0012] As a preferred technical solution of the present invention, the gas flow sensor is electrically connected to the controller, and the controller is electrically connected to the alarm.

[0013] As a preferred technical solution of the present invention, the first connecting pipe, the second connecting pipe, the third connecting pipe and the fourth connecting pipe are all fixedly installed with switch valves.

[0014] As a preferred technical solution of the present invention, the controller is an SC200 universal controller.

[0015] The beneficial effect of the utility model is as follows: the oil-off protection device for the screw air compressor first sets a minimum value for the controller. When the gas enters the cooler through the fourth connecting pipe, the gas flow sensor collects the instantaneous flow information of the gas transported by the fourth connecting pipe and transmits it to the controller. The controller converts the instantaneous flow information into data and compares it with the minimum value. When it is less than or equal to the minimum value, it means that the oil level in the oil-gas separation barrel is too high, causing the oil-gas separation barrel to be unable to be used normally, thereby failing to separate sufficient gas or failing to separate gas. The controller will then send a command to the alarm, and the alarm will work to remind the staff.

[0016] The utility model can realize the self-alarm function without destroying the internal structure of the oil-gas separation barrel, thereby preventing the liquid level in the oil-gas separation barrel from being too high and affecting the normal use of the oil-gas separation barrel. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 This is a structural diagram of an oil cut-off protection device for a screw air compressor according to the utility model;

[0019] Figure 2 This is a partial structural diagram of an oil cut-off protection device for a screw air compressor according to the utility model;

[0020] Figure 3 This is a schematic diagram of the rear structure of an oil cut-off protection device for a screw air compressor according to the utility model;

[0021] Figure 4 The utility model is a top side structural sectional view of a detection box in an oil cut-off protection device for a screw air compressor.

[0022] In the figure: 1. Air filter intake system; 2. First connecting pipe; 3. Direct-connected main unit; 4. Second connecting pipe; 5. Oil-gas separation barrel; 6. Liquid pump; 7. Third connecting pipe; 8. Oil cooler; 9. Gas pump; 10. Fourth connecting pipe; 11. Detection box; 12. Gas cooler; 13. Mounting back panel; 14. Controller; 15. Alarm; 16. Gas flow sensor. DETAILED DESCRIPTION

[0023] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0024] Example: Figure 1-2 As shown, the utility model is an oil cut-off protection device for a screw air compressor, comprising an air filter intake system 1, the air filter intake system 1 being connected to the air intake end of a direct-connected main engine 3 through a first connecting pipe 2, the air outlet end of the direct-connected main engine 3 being fixedly connected to a second connecting pipe 4, the other end of the second connecting pipe 4 being fixedly connected to the feed end of an oil-gas separation barrel 5, a gas pump 9 and a liquid pump 6 being fixedly mounted on the upper end of the oil-gas separation barrel 5, and the gas pump 9 and the liquid pump 6 being fixedly mounted on a fourth connecting pipe 10 and a third connecting pipe 7, respectively, one end of each of the third connecting pipe 7 and the fourth connecting pipe 10 passing through the upper end of the oil-gas separation barrel 5, and one end of the third connecting pipe 7 extending to the bottom end of the oil-gas separation barrel 5;

[0025] The other ends of the third connecting pipe 7 and the fourth connecting pipe 10 are fixedly connected to the feed ends of the oil cooler 8 and the air cooler 12 respectively.

[0026] The air filter intake system 1 takes in filtered air and is connected to the air inlet end of the direct-connected main unit 3 through the first connecting pipe 2. The direct-connected main unit 3 compresses the air, and the compressed oil-gas mixture enters the oil-gas separation barrel 5 through the second connecting pipe 4 to separate the oil and gas. After the oil and gas are separated, the liquid pump 6 and the gas pump 9 are started. The oil and gas generated after separation enter the oil cooler 8 and the gas cooler 12 through the third connecting pipe 7 and the fourth connecting pipe 10 respectively for cooling.

[0027] In this embodiment, Figure 2-4As shown, a detection box 11 is fixedly installed on the upper end of the air cooler 12, and the fourth connecting pipe 10 passes through the detection box 11. A gas flow sensor 16 is fixedly installed on the right end face of the inside of the detection box 11, and the sensing end of the gas flow sensor 16 passes through the outer end of the fourth connecting pipe 10 and extends into the inside of the fourth connecting pipe 10. The air cooler 12 and the oil cooler 8 are fixedly installed on the front end face of the mounting backplate 13, and the rear end face of the mounting backplate 13 is fixedly installed with a controller 14 and an alarm 15. The gas flow sensor 16 is electrically connected to the controller 14, and the controller 14 is electrically connected to the alarm 15. Switch valves are fixedly installed on the first connecting pipe 2, the second connecting pipe 4, the third connecting pipe 7 and the fourth connecting pipe 10. By setting the switch valves, the opening and closing of the first connecting pipe 2, the second connecting pipe 4, the third connecting pipe 7 and the fourth connecting pipe 10 can be controlled. The controller 14 is an SC200 universal controller.

[0028] First, a minimum value is set for the controller 14. When the gas enters the cooler through the fourth connecting pipe 10, the gas flow sensor 16 will collect the instantaneous flow information of the gas transported by the fourth connecting pipe 10 and transmit it to the controller 14. The controller 14 converts the instantaneous flow information into data and compares it with the minimum value. When it is less than or equal to the minimum value, it means that the oil level in the oil-gas separation barrel 5 is too high, which makes the oil-gas separation barrel 5 unable to be used normally, and thus the gas cannot be separated in sufficient quantity or cannot be separated. The controller 14 will send an instruction to the alarm 15, and the alarm 15 will work to remind the staff.

[0029] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An oil cut-off protection device for a screw air compressor, characterized in that: The invention comprises an air filter air intake system (1), wherein the air outlet end of the air filter air intake system (1) is connected to the air inlet end of the direct-connected main engine (3) through a first connecting pipe (2), the air outlet end of the direct-connected main engine (3) is fixedly connected to a second connecting pipe (4), the other end of the second connecting pipe (4) is fixedly connected to the feed end of the oil-gas separation barrel (5), the upper end of the oil-gas separation barrel (5) is fixedly installed with a gas pump (9) and a liquid pump (6), and the gas pump (9) and the liquid pump (6) are fixedly installed on a fourth connecting pipe (10) and a third connecting pipe (7), respectively, one end of each of the third connecting pipe (7) and the fourth connecting pipe (10) passes through the upper end of the oil-gas separation barrel (5), and one end of the third connecting pipe (7) extends to the bottom end inside the oil-gas separation barrel (5); The other ends of the third connecting pipe (7) and the fourth connecting pipe (10) are fixedly connected to the feed ends of the oil cooler (8) and the air cooler (12), respectively.

2. The oil cut-off protection device for a screw air compressor according to claim 1, characterized in that: A detection box (11) is fixedly mounted on the upper end of the gas cooler (12), the fourth connecting pipe (10) passes through the detection box (11), a gas flow sensor (16) is fixedly mounted on the right end face inside the detection box (11), and the sensing end of the gas flow sensor (16) passes through the outer end of the fourth connecting pipe (10) and extends into the interior of the fourth connecting pipe (10).

3. The oil cut-off protection device for a screw air compressor according to claim 2, characterized in that: The air cooler (12) and the oil cooler (8) are fixedly mounted on the front end face of the mounting back plate (13), and the rear end face of the mounting back plate (13) is fixedly mounted with a controller (14) and an alarm (15).

4. The oil cut-off protection device for a screw air compressor according to claim 3, characterized in that: The gas flow sensor (16) is electrically connected to the controller (14), and the controller (14) is electrically connected to the alarm (15).

5. The oil cut-off protection device for a screw air compressor according to claim 4, characterized in that: On-off valves are fixedly mounted on the first connecting pipe (2), the second connecting pipe (4), the third connecting pipe (7) and the fourth connecting pipe (10).

6. The oil cut-off protection device for a screw air compressor according to claim 5, characterized in that: The controller (14) is a SC200 universal controller.

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