Oil tank system of low-pressure screw air compressor

Abstract

The utility model provides an oil tank system of a low-pressure screw air compressor. The oil tank system comprises an oil tank body, an oil inlet and an immersion pump, the oil inlet is formed in the bottom of the oil tank body, the immersion type pump is arranged on a top flange of the oil tank body, a suction inlet of the immersion type pump is located in the oil tank body, a mechanical seal outlet hole of the immersion type pump is communicated with the atmosphere, and the mechanical seal outlet hole is as high as the top flange of the oil tank body; an oil-gas separation barrel of the low-pressure screw air compressor is connected with the oil inlet, the oil-gas separation barrel and the oil tank body form a communicating vessel, and the amount of lubricating oil in the oil tank body is smaller than the volume of the oil tank body. By applying the technical scheme, the risk of lubricating oil leakage can be avoided.

Description

Technical Field

[0001] The utility model relates to an oil tank system of a low-pressure screw air compressor. Background Art

[0002] Many industries such as glass, cement, textile, printing and dyeing require compressed air working pressure of only 0.3-0.5MPa. If conventional air compressors are used, it will cause a large waste of electricity. The use of low-pressure screw air compressors can greatly increase the output of compressed air under the same motor power, which can avoid such energy waste accordingly.

[0003] Since the air compressor takes a long time to build up internal pressure when it is just started at extremely low exhaust pressure (0.2-0.3MPa), if the lubricating oil is not delivered to the machine head in time for cooling, problems such as high temperature and jamming of the machine head may occur. To avoid these problems, low-pressure screw air compressors with an exhaust pressure of 0.2-0.3MPa are often equipped with booster pumps.

[0004] When the air compressor is running, the lubricating oil is sprayed out from the oil outlet of the oil-gas separation barrel with a certain pressure. If an ordinary centrifugal pump is used, since the centrifugal pump is mechanical and the mechanical seal is connected to the atmosphere, there will be a risk of lubricating oil leakage. If a magnetic pump is used, it can ensure no leakage, but the price is relatively expensive. Utility Model Content

[0005] The purpose of the utility model is to overcome the above-mentioned deficiencies in the prior art and to provide an oil tank system for a low-pressure screw air compressor that avoids the risk of lubricating oil leakage.

[0006] In order to solve the above technical problems, the utility model provides an oil tank system for a low-pressure screw air compressor, comprising an oil tank body, an oil inlet, and an immersion pump; the oil inlet is arranged at the bottom of the oil tank body, the immersion pump is arranged at the top flange of the oil tank body, the suction port of the immersion pump is located in the oil tank body, the mechanical seal outlet hole of the immersion pump is connected to the atmosphere, and the mechanical seal outlet hole is at the same height as the top flange of the oil tank body; the oil and gas separation barrel of the low-pressure screw air compressor is connected to the oil inlet, and the oil and gas separation barrel and the oil tank body form a communicating vessel.

[0007] In a more preferred embodiment, an oil mirror is provided on the upper portion of the oil tank body, and the oil mirror is used to display the liquid level of the oil tank body.

[0008] In a more preferred embodiment, the top flange of the fuel tank body is also provided with a fuel filling port.

[0009] In a more preferred embodiment, it further comprises a connecting pipe, a ball valve and a Y-type filter, wherein the connecting pipe, the ball valve and the Y-type filter are sequentially connected between the bottom wall of the oil tank body and the oil inlet.

[0010] In a more preferred embodiment, it also includes a pressure detection joint arranged on the oil tank body.

[0011] In a more preferred embodiment, the oil tank body includes a tank body, a top flange and support legs; the top flange cover is arranged on the upper opening of the tank body, and the support legs are arranged at the bottom of the tank body.

[0012] In a more preferred embodiment, the top flange includes a middle opening, the suction port of the immersion pump extends from the middle opening into the box body, and the immersion pump is fixedly connected to the periphery of the middle opening.

[0013] Compared with the prior art, the technical solution of the utility model has the following beneficial effects:

[0014] The oil tank system provided by the utility model can ensure that the amount of lubricating oil in the oil tank is lower than the volume of the oil tank after the oil-gas separation barrel of the micro-oil air compressor and the oil tank form a communicating vessel, and the mechanical seal outlet hole of the immersion pump is at the same height as the top flange of the oil tank body, thereby avoiding the risk of lubricating oil leakage.

[0015] The oil tank system provided by the utility model confirms the oil tank flange height and the oil mirror height by calculating the lubricating oil quantity and the volume of the oil tank body. After the oil-gas separation barrel of the micro-oil air compressor forms a communicating vessel with the oil tank, the lubricating oil level is not higher than the highest value of the oil mirror, which can ensure that the lubricating oil quantity in the oil tank body is lower than the volume of the oil tank body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a side view of the fuel tank system in the preferred embodiment of the utility model;

[0017] Figure 2 It is a three-dimensional schematic diagram of the oil tank system without the immersion pump in the preferred embodiment of the utility model. DETAILED DESCRIPTION

[0018] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0019] See also Figure 1-Figure 2 , an oil tank system of a low-pressure screw air compressor, the oil tank system includes an oil tank body 1, an oil inlet 2, and an immersion pump 3.

[0020] The oil inlet 2 is arranged at the bottom of the oil tank body 1, the submerged pump 3 is arranged at the top flange 11 of the oil tank body 1, the suction port of the submerged pump 3 is located in the oil tank body 1, the mechanical seal outlet hole of the submerged pump 3 is connected to the atmosphere, and the mechanical seal outlet hole is at the same height as the top flange 11 of the oil tank body 1. The oil-gas separation barrel of the low-pressure screw air compressor is connected to the oil inlet 2, and the oil-gas separation barrel forms a communicating vessel with the oil tank body 1. The amount of lubricating oil in the oil tank body 1 is lower than the volume of the oil tank body 1, and the mechanical seal outlet hole of the submerged pump 3 is at the same height as the top flange 11 of the oil tank body 1, which can avoid the risk of lubricating oil leakage.

[0021] In this embodiment, an oil mirror 12 is provided on the upper part of the oil tank body 1, and the oil mirror 12 is used to display the liquid level of the oil tank body 1. The oil mirror 12 includes a transparent mirror tube, and the upper end and the lower end of the mirror tube are respectively connected to the oil tank body 1 to communicate with the oil tank body 1, and the lubricating oil in the oil tank body 1 can enter the mirror tube from the lower end of the mirror tube to display the liquid level in real time.

[0022] In this embodiment, the top flange 11 of the oil tank body 1 is also provided with a refueling port 13. The refueling port 13 is used to add lubricating oil.

[0023] The oil tank system further comprises a connecting pipe 4 , a ball valve 5 and a Y-type filter 6 , wherein the connecting pipe 4 , the ball valve 5 and the Y-type filter 6 are sequentially connected between the bottom wall of the oil tank body 1 and the oil inlet 2 .

[0024] The oil tank system further comprises a pressure detection joint 7 arranged on the oil tank body 1. The pressure detection joint 7 is used to detect the internal pressure of the oil tank body 1. The pressure detection joint 7 can be a pressure transmitter or a pressure difference transmitter.

[0025] The oil tank body 1 includes a tank body 14, a top flange 11 and support legs 15; the top flange 11 covers the upper opening of the tank body 14, and the support legs 15 are arranged at the bottom of the tank body 14. The top flange 11 includes a middle opening 111, and the suction port of the immersion pump 3 extends into the tank body 14 from the middle opening 111, and the immersion pump 3 is fixedly connected to the periphery of the middle opening 111. The bottom of the tank body 14 is semicircular or in any other shape.

[0026] The oil outlet of the oil-gas separation barrel of the micro-oil air compressor is connected to the oil inlet 2 of the oil tank system, passes through the Y-type filter 6 to ensure that the particles and impurities of the medium will not affect the operation of the pump, and further flows through the ball valve 5. The oil injection can be adjusted in front of the oil tank body 1, and then enters the oil tank body 1 through the connecting pipe 4, and is sprayed out from the oil injection port 31 of the submerged pump 3 through the suction port of the submerged pump 3. Lubricating oil is injected from the refueling port 13, and the oil level of the oil tank body 1 can be observed through the oil mirror 12. After the oil-gas separation barrel of the micro-oil air compressor forms a connecting vessel with the oil tank, the lubricating oil level is not higher than the highest value of the oil mirror 12 range, which can ensure that the amount of lubricating oil in the oil tank is lower than the volume of the oil tank, and the mechanical seal outlet hole of the submerged pump 3 is at the same height as the top flange 11, which can avoid the risk of lubricating oil leakage.

[0027] The above is only a preferred specific implementation method of the utility model, but the design concept of the utility model is not limited to this. Any technician familiar with the technical field who uses this concept to make non-substantial changes to the utility model within the technical scope disclosed by the utility model shall be deemed to infringe the protection scope of the utility model.

Claims

1. A fuel tank system for a low-pressure screw air compressor, characterized in that: It includes an oil tank body, an oil inlet, and an immersion pump; the oil inlet is arranged at the bottom of the oil tank body, the immersion pump is arranged at the top flange of the oil tank body, the suction port of the immersion pump is located in the oil tank body, the mechanical seal outlet hole of the immersion pump is connected to the atmosphere, and the mechanical seal outlet hole is at the same height as the top flange of the oil tank body; the oil and gas separation barrel of the low-pressure screw air compressor is connected to the oil inlet, and the oil and gas separation barrel forms a communicating vessel with the oil tank body, and the amount of lubricating oil in the oil tank body is lower than the volume of the oil tank body.

2. The oil tank system of a low-pressure screw air compressor according to claim 1, characterized in that: An oil mirror is arranged on the upper part of the oil tank body, and the oil mirror is used to display the liquid level height of the oil tank body.

3. The oil tank system of a low-pressure screw air compressor according to claim 1, characterized in that: The top flange of the oil tank body is also provided with a refueling port.

4. The oil tank system of a low-pressure screw air compressor according to claim 1, characterized in that: It also includes a connecting pipe, a ball valve and a Y-type filter, which are sequentially connected between the bottom wall of the oil tank body and the oil inlet.

5. The oil tank system of a low-pressure screw air compressor according to claim 1, characterized in that: It also includes a pressure detection joint arranged on the oil tank body.

6. The oil tank system of a low-pressure screw air compressor according to claim 1, characterized in that: The oil tank body comprises a tank body, the top flange and support legs; the top flange cover is arranged on the upper opening of the tank body, and the support legs are arranged at the bottom of the tank body.

7. The oil tank system of a low-pressure screw air compressor according to claim 6, characterized in that: The top flange comprises a middle opening, the suction port of the immersion pump extends from the middle opening into the box body, and the immersion pump is fixedly connected to the periphery of the middle opening.

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