Environment-friendly oil storage tank

Abstract

The utility model relates to an environment-friendly oil storage tank which comprises an oil storage cavity, a first pipeline, a second pipeline, a third pipeline, a fourth pipeline, a water ejector and an oil pump. The auxiliary oil bag in the oil storage cavity is communicated with one end of the first pipeline and one end of the second pipeline, the other end of the first pipeline is an oil return port, and the other end of the second pipeline is an oil inlet and air inlet air blowing port; the main oil bag in the oil storage cavity is communicated with one end of the third pipeline and one end of the fourth pipeline, and the other end of the third pipeline is an oil discharge port; the other end of the fourth pipeline is connected with a branch pipeline I and a branch pipeline II; the branch pipeline I is connected with the water ejector and the oil pump in series and then is communicated with the first pipeline; the second branch pipeline is communicated with the second pipeline, and the first branch pipeline is communicated with the third pipeline and then communicated with the first pipeline. The device has the beneficial effects that the integration of oil sample storage and waste oil discharge is realized, and the requirements of on-site rapid collection and recycling of waste oil are met.

Description

Technical Field

[0001] The utility model relates to the technical field of waste oil recovery, in particular to an environmentally friendly oil storage tank. Background Art

[0002] Existing oil containers are limited to oil storage, and for some occasions where oil samples need to be transferred, more tools are required and the process is complicated. For example, for equipment such as transformers that need to use cooling oil, it is necessary to regularly test whether the concentration of various gases in the cooling oil exceeds the standard to determine whether the equipment needs further inspection or maintenance. The common method is to take out the oil in the container and collect it in another container after testing, that is, at least two sets of oil extraction equipment and collection equipment are required. Utility Model Content

[0003] The utility model aims at the technical problems existing in the prior art and provides an environmentally friendly oil storage tank, which can collect the detected oil at the same time and use or recycle it after processing according to needs.

[0004] The utility model solves the above technical problems with the following technical solutions: an environmentally friendly oil storage tank, comprising an oil storage cavity, a first pipeline, a second pipeline, a third pipeline, a fourth pipeline, a water ejector, and an oil pump;

[0005] The auxiliary oil bag in the oil storage cavity is connected with one end of the first pipeline and the second pipeline, the other end of the first pipeline is an oil return port, and the other end of the second pipeline is an oil inlet, air inlet, and air inflation port;

[0006] The main oil bag in the oil storage cavity is connected with the third pipe and one end of the fourth pipe, and the other end of the third pipe is an oil discharge port;

[0007] The other end of the fourth pipeline is connected to a branch pipeline 1 and a branch pipeline 2, and the branch pipeline 1 is connected in series with the water ejector and the oil pump and then communicates with the first pipeline, so as to transport the oil in the main oil bag to the auxiliary oil bag through the fourth pipeline, the branch pipeline 1, and the first pipeline in sequence;

[0008] The branch pipe 2 is connected to the second pipe, and the branch pipe 1 is connected to the third pipe and then to the first pipe, so that the oil in the auxiliary oil bag is transported to the main oil bag through the second pipe, the branch pipe 2, the branch pipe 1, and the third pipe in sequence.

[0009] As a further technical solution, it also includes a first gas pipeline connected to the main oil bag. When the main oil bag is filled with oil or exhausted with air, the first gas pipeline is opened to exhaust air. When the main oil bag is discharged with oil, the first gas pipeline is opened to exhaust air.

[0010] As a further technical solution, it also includes a second gas pipeline connected to the auxiliary oil bag. When the auxiliary oil bag is filled with oil or sucked out of gas, the second gas pipeline is opened to discharge gas. When the auxiliary oil bag is discharged from oil, the second gas pipeline is opened to discharge gas.

[0011] As a further technical solution, a first liquid level sensor, a first pressure sensor, and a first solenoid valve are sequentially connected in series on the first gas pipeline, and the first solenoid valve is arranged at one end away from the main oil bag.

[0012] As a further technical solution, a second liquid level sensor, a second pressure sensor, and a second solenoid valve are sequentially connected in series on the second gas pipeline, and the second solenoid valve is arranged at one end away from the auxiliary oil bag.

[0013] As a further technical solution, a flow meter and a third pressure sensor are provided on the pipe section between the branch pipe 1 and the third pipe.

[0014] As a further technical solution, a fourth pressure sensor and a third solenoid valve are sequentially arranged on the first pipeline;

[0015] The second pipeline is provided with a fourth solenoid valve, a fifth solenoid valve, and a third liquid level sensor in sequence;

[0016] The third pipeline is provided with a sixth solenoid valve and a seventh solenoid valve in sequence;

[0017] The fourth pipeline is provided with an eighth solenoid valve and a fourth liquid level sensor in sequence;

[0018] Wherein, the fourth pressure sensor is arranged at a connection node between the first pipeline and the first branch pipeline.

[0019] As a further technical solution, a ninth solenoid valve is provided on the pipe section between the first pipe and the third pipe on the branch pipe 1.

[0020] As a further technical solution, it also includes a third gas pipeline having one end connected to the first gas pipeline and the other end connected to the water ejector, and a tenth solenoid valve is provided on the third gas pipeline;

[0021] Wherein, the first pressure sensor is arranged at a node on the first gas pipeline where the first gas pipeline is connected to the third gas pipeline.

[0022] As a further technical solution, the first pipeline and the third pipeline are used to transport oil to the auxiliary oil bag and the main oil bag respectively.

[0023] The beneficial effect of the utility model is that the detected waste oil can be collected into the main oil bag or discharged into the auxiliary oil bag according to demand, so as to realize the integration of oil sample storage and waste oil discharge, and meet the needs of rapid collection and recycling of waste oil on site. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a structural flow chart of the utility model.

[0025] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0026] Oil storage cavity 1, first pipeline 2, second pipeline 3, third pipeline 4, fourth pipeline 5, water ejector 6, oil pump 7, auxiliary oil bag 8, main oil bag 8a, branch pipeline 1 9, branch pipeline 2 10, first gas pipeline 11, first liquid level sensor 12, first pressure sensor 13, first solenoid valve 14, third gas pipeline 15, tenth solenoid valve 16, second gas pipeline 17, second liquid level sensor 18, second pressure sensor 19, second solenoid valve 20, flow meter 21, third pressure sensor 22, fourth pressure sensor 23, third solenoid valve 24, fourth solenoid valve 25, fifth solenoid valve 26, third liquid level sensor 27, sixth solenoid valve 28, seventh solenoid valve 29, eighth solenoid valve 30, fourth liquid level sensor 31, ninth solenoid valve 32, switch 33. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0028] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "plurality" means two or more, unless otherwise clearly and specifically defined.

[0029] In the description of the present application, the term "for example" is used to mean "used as an example, illustration or description". Any embodiment described as "for example" in the present application is not necessarily to be construed as being more preferred or advantageous than other embodiments. In order to enable any technician in the field to implement and use the utility model, the following description is given. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art can recognize that the utility model can be implemented without using these specific details. In other examples, well-known structures and processes will not be elaborated in detail to avoid unnecessary details that make the description of the utility model obscure. Therefore, the utility model is not intended to be limited to the embodiments shown, but is consistent with the widest range of principles and features disclosed in the present application.

[0030] This embodiment provides an environmentally friendly oil storage tank, so that the waste oil after detection can be collected and recycled into the main oil bag 8a or discharged into the auxiliary oil bag 8 according to demand, realizing the integration of oil sample storage and waste oil discharge, and meeting the needs of rapid collection and recycling of waste oil on site.

[0031] Specifically, it includes an oil storage cavity 1, a first pipeline 2, a second pipeline 3, a third pipeline 4, a fourth pipeline 5, a water ejector 6, and an oil pump 7; the auxiliary oil bag 8 in the oil storage cavity 1 is connected with one end of the first pipeline 2 and the second pipeline 3, the other end of the first pipeline 2 is an oil return port, and the other end of the second pipeline 3 is an oil inlet, air inlet, and air inflation port; the main oil bag 8a in the oil storage cavity 1 is connected with one end of the third pipeline 4 and the fourth pipeline 5, and the other end of the third pipeline 4 is an oil discharge port; the other end of the fourth pipeline 5 is connected with a branch pipeline 1 9 and a branch pipeline 2 10, and the branch pipeline 1 9 is connected in series with the water ejector 6 and the oil pump 7 and then connected to The first pipeline 2 is connected to transport the oil in the main oil bag 8a to the auxiliary oil bag 8 through the fourth pipeline 5, the branch pipeline 1 9, and the first pipeline 2 in sequence, that is, to achieve the purpose of converting oil from the main oil bag 8a to the auxiliary oil bag 8; the branch pipeline 2 10 is connected to the second pipeline 3, and the branch pipeline 1 9 is connected to the third pipeline 4 and then connected to the first pipeline 2, so that the oil in the auxiliary oil bag 8 is transported to the main oil bag 8a through the second pipeline 3, the branch pipeline 2 10, the branch pipeline 1 9, and the third pipeline 4 in sequence, that is, to achieve the purpose of converting oil from the auxiliary oil bag 8 to the main oil bag 8a. The first pipeline 2 and the third pipeline 4 are used to transport oil to the auxiliary oil bag 8 and the main oil bag 8a respectively. In this embodiment, the oil storage cavity 1 can be made of stainless steel, and more specifically, it can be a stainless steel oil cylinder, so that the main oil bag 8a and the auxiliary oil bag 8 are independently arranged side by side therein.

[0032] In the specific real-time process, the oil storage tank also includes a first gas pipeline 11 connected to the main oil bag 8a. When the main oil bag 8a is filled with oil or pumped with gas, the first gas pipeline 11 is opened to discharge gas. When the main oil bag 8a is discharged with oil, the first gas pipeline 11 is opened to discharge gas. In order to detect the oil or gas situation in the main oil bag 8a in real time, the first gas pipeline 11 is connected in series with a first liquid level sensor 12, a first pressure sensor 13, and a first solenoid valve 14 in sequence. The first solenoid valve 14 is arranged at one end away from the main oil bag 8a. More specifically, it also includes a third gas pipeline 15 with one end connected to the first gas pipeline 11 and the other end connected to the water ejector 6. The third gas pipeline 15 is provided with a tenth solenoid valve 16; wherein the first pressure sensor 13 is arranged at the node where the first gas pipeline 11 is connected to the third gas pipeline 15.

[0033] Similarly, the oil storage tank also includes a second gas pipeline 17 connected to the auxiliary oil bag 8. When the auxiliary oil bag 8 is filled with oil or sucked out of gas, the second gas pipeline 17 is opened to discharge gas. When the auxiliary oil bag 8 is discharged from oil, the second gas pipeline 17 is opened to discharge gas. The second gas pipeline 17 is connected in series with a second liquid level sensor 18, a second pressure sensor 19, and a second solenoid valve 20. The second solenoid valve 20 is arranged at one end away from the auxiliary oil bag 8 to detect the oil or gas situation in the auxiliary oil bag 8 in real time.

[0034] In the specific real-time process, a flow meter 21 and a third pressure sensor 22 are provided on the pipe section between the branch pipe 9 and the third pipe 4. The flow meter 21 is a liquid flow meter 21, which is used to measure the liquid flow in the pipe. More specifically, a fourth pressure sensor 23 and a third electromagnetic valve 24 are provided in sequence on the first pipe 2; a fourth electromagnetic valve 25, a fifth electromagnetic valve 26 and a third liquid level sensor 27 are provided in sequence on the second pipe 3; a sixth electromagnetic valve 28 and a seventh electromagnetic valve 29 are provided in sequence on the third pipe 4; an eighth electromagnetic valve 30 and a fourth liquid level sensor 31 are provided in sequence on the fourth pipe 5; wherein the fourth pressure sensor 23 is provided at the connection node between the first pipe 2 and the branch pipe 9. A ninth electromagnetic valve 32 is provided on the pipe section between the first pipe 2 and the third pipe 4 on the branch pipe 9.

[0035] In the specific implementation process, the ports connecting the first pipeline 2, the second pipeline 3, the second gas pipeline 17 and the auxiliary oil bag 8 are all provided with switches 33 for controlling the opening and closing of the auxiliary oil bag 8; similarly, the ports connecting the third pipeline 4, the fourth pipeline 5, the first gas pipeline 11 and the main oil bag 8a are all provided with switches 33 for controlling the opening and closing of the main oil bag 8a.

[0036] The utility model is achieved in this way:

[0037] In the following links, in order to detect the status of the entire fuel tank, the first liquid level sensor 12, the second liquid level sensor 18, the third liquid level sensor 27, the fourth liquid level sensor 31, the first pressure sensor 13, the second pressure sensor 19, the third pressure sensor 22, and the fourth pressure sensor 23 are always in the on state.

[0038] 1. Oil drain cleaning

[0039] The residual oil in the main oil bag 8a and the auxiliary oil bag 8 are emptied for standby use. At this time, the end of the third pipeline 4 away from the main oil bag 8a is an oil discharge port and is externally connected to an oil collection barrel. The first gas pipeline 11 and the second gas pipeline 17 are both opened to balance the air pressure intake. When the oil is drained, the main oil bag 8a and the auxiliary oil bag 8 are both in a stretched state;

[0040] The oil discharge path of the main oil bag 8a: turn on the switch 33 on the first gas pipeline 11, and let in air through the first gas pipeline 11 to balance the air pressure in the main oil bag 8a. At the same time, turn on the switch 33 on the fourth pipeline 5 and the branch pipeline 9, so that the oil in the main oil bag 8a is discharged from the oil outlet of the third pipeline 4 (at this time, the oil outlet is connected to an oil collecting barrel). When the fourth liquid level sensor 31 displays no oil, it means that the oil has been drained. During this process, the first solenoid valve 14, the eighth solenoid valve 30, the water ejector 6, the oil pump 7, the flow meter 21, and the sixth solenoid valve 28 are all turned on.

[0041] The oil discharge path of the auxiliary oil bag 8: turn on the switch 33 on the second gas pipeline 17, and let in air through the second gas pipeline 17 to balance the air pressure in the main oil bag 8a. At the same time, turn on the switch 33 on the second pipeline 3, the branch pipeline 2 10, and the branch pipeline 1 9, so that the oil in the main oil bag 8a is discharged from the oil outlet of the third pipeline 4 (at this time, the oil outlet is connected to an oil collecting barrel). When the third liquid level sensor 27 displays no oil, it means that the oil has been drained. In this process, the second solenoid valve 20, the fifth solenoid valve 26, the water ejector 6, the oil pump 7, the flow meter 21, and the sixth solenoid valve 28 are all turned on.

[0042] 2. Pumping

[0043] After the above-mentioned oil drainage process 1 is performed, there is no oil in the main oil bag 8a and the auxiliary oil bag 8. The normal-pressure air in the main oil bag 8a or the auxiliary oil bag 8 can be evacuated as needed, and the fourth solenoid valve 25 on the second pipeline 3 is opened to allow air to flow in, so as to clean the residual gas in the main oil bag 8a or the auxiliary oil bag 8. The evacuation can be continued for 5 minutes.

[0044] The air extraction path of the main oil bag 8a: the end of the second pipe 3 facing away from the oil storage cavity 1 is connected to the air extraction pump, and then the fourth solenoid valve 25, the branch pipeline 2, the eighth solenoid valve 30, and the switch 33 on the fourth pipe 5 are opened, and the vacuum gas is drawn into the main oil bag 8a through the air extraction pump, and at the same time, the switch 33 on the first gas pipeline 11 and the first solenoid valve 14 are opened to allow the normal-pressure gas in the main oil bag 8a to be discharged through the first gas pipeline 11.

[0045] The auxiliary oil bag 8 is evacuated by connecting the end of the second pipe 3 away from the oil storage chamber 1 to the air pump, and then opening the fifth solenoid valve 26 and the switch 33 connecting the second pipe 3 and the auxiliary oil bag 8, and pumping vacuum gas into the auxiliary oil bag 8 through the air pump, and at the same time opening the switch 33 on the second gas pipe 17 and the second solenoid valve 20 to discharge the normal pressure gas in the auxiliary oil bag 8 through the second gas pipe 17. The auxiliary oil bag 8 is evacuated only when necessary.

[0046] 3. Oil inlet

[0047] The main oil bag 8a is filled with oil: the end of the second pipe 3 away from the oil storage chamber is the oil inlet, so the fourth solenoid valve 25, the water ejector 6, the oil pump 7, the flow meter 21, the eighth solenoid valve 30 and the switch 33 between the third pipe 4 and the main oil bag 8a are opened to allow oil to enter the main oil bag 8a; at the same time, the switch 33 and the first solenoid valve 14 between the first gas pipe 11 and the main oil bag 8a are opened to allow the main oil bag 8a to be filled with oil while the gas in the main oil bag 8a can be discharged through the first gas pipe 11. In the initial state of the main oil bag 8a, the first pressure sensor 13 indicates normal pressure and the first liquid level sensor 12 indicates no oil. If the first pressure sensor 13 indicates normal pressure and the first liquid level sensor 12 indicates oil, it means that the main oil bag 8a is full of oil.

[0048] The auxiliary oil bag 8 is filled with oil: the end of the second pipe 3 away from the oil storage chamber is the oil inlet, so the fourth solenoid valve 25, the water ejector 6, the oil pump 7, the flow meter 21, the ninth solenoid valve 32, the third solenoid valve 24, and the switch 33 between the first pipe 2 and the auxiliary oil bag 8 are opened to allow oil to enter the auxiliary oil bag 8; at the same time, the switch 33 and the second solenoid valve 20 between the second gas pipe 17 and the auxiliary oil bag 8 are opened to allow the auxiliary oil bag 8 to enter with oil while the gas in the auxiliary oil bag 8 can be discharged through the second gas pipe 17. In the initial state of the auxiliary oil bag 8, the second pressure sensor 19 indicates normal pressure and the second liquid level sensor 18 indicates no oil. If the second pressure sensor 19 indicates normal pressure and the second liquid level sensor 18 indicates oil, it means that the auxiliary oil bag 8 is full of oil.

[0049] Oil discharge verification:

[0050] Drain the oil from the main oil bag 8a and recycle the auxiliary oil bag 8, i.e., do not return the oil to the circulation;

[0051] There are three specific paths and they are carried out simultaneously:

[0052] 1. Oil circulation in the oil circuit: open the switch 33 between the fourth pipeline 5 and the main oil bag 8a, the eighth solenoid valve 30, the water ejector, the oil pump 7, the flow meter 21, the seventh solenoid valve 29, and the switch 33 between the third pipeline 4 and the main oil bag 8a, so that the oil in the main oil bag 8a is discharged through the fourth pipeline 5 and then flows back to the main oil bag 8a through the third pipeline 4.

[0053] 2. Gas circuit circulation: Open the switch 33 between the first gas pipeline 11 and the main oil bag 8a, the first liquid level sensor 12, the tenth solenoid valve 16, and the water ejector 6 to circulate and mix gas;

[0054] 3. External oil circulation: Open the sixth solenoid valve 28 to allow the oil from the main oil bag 8a to be discharged from the third pipe 4 for detection by the chromatograph. At the same time, open the third solenoid valve 24, the switch 33 between the first pipe 2 and the auxiliary oil bag 8, the switch 33 between the second gas pipe 17 and the auxiliary oil bag 8, and the second solenoid valve 20, so that the oil detected by the chromatograph enters from the first pipe 2 and returns to the auxiliary oil bag 8 through the third solenoid valve 24, and is exhausted through the second gas pipe 17.

[0055] This allows the waste oil from the first pipeline 2 to be recovered to the auxiliary oil bag 8 at any time;

[0056] In the above-mentioned paths one, two and three, the second liquid level sensor 18 and the second pressure sensor 19 need to be monitored.

[0057] Cycle Verification:

[0058] In this process, the main oil bag 8a discharges and returns oil at the same time, i.e., an oil return cycle;

[0059] There are two specific paths and they are carried out simultaneously:

[0060] 1. Oil circuit circulation: It is the same as the path 1 of the above-mentioned standard oil verification, so it will not be elaborated here.

[0061] 2. External oil circulation: Open the sixth solenoid valve 28 so that the oil from the main oil bag 8a is discharged from the third pipe 4 to be detected by the chromatograph. At the same time, open the ninth solenoid valve 32, the seventh solenoid valve 29, and the switch 33 between the third pipe 4 and the main oil bag 8a, so that the oil detected by the chromatograph enters from the first pipe 2 and returns to the main oil bag 8 through the ninth solenoid valve 32 and the seventh solenoid valve 29.

[0062] 4. Oil storage and oil change

[0063] Main and auxiliary oil change: the oil in the main oil bag 8a is transferred to the auxiliary oil bag 8. If the fourth hydraulic sensor indicates that there is no oil, it means that the main oil bag 8a has been drained. If the second hydraulic sensor indicates that there is oil, it means that the auxiliary oil bag 8 is full. However, if the fourth hydraulic sensor indicates that there is oil and the second hydraulic sensor also indicates that there is oil, it indicates a fault. The oil in the main oil bag 8a can be drained and cleaned. During the circulation process, the second hydraulic sensor and the second pressure sensor 19 are monitored. If the second hydraulic sensor indicates that there is no oil but the second pressure sensor 19 indicates that the pressure is too high, the second solenoid valve 20 can be opened to exhaust. In the test process, all the waste oil after testing is introduced into the auxiliary oil bag 8, realizing the integration of oil sample storage and waste oil discharge, meeting the needs of rapid collection and recycling of waste oil on site, improving work efficiency, and saving resources while protecting the environment.

[0064] The specific path for the main and auxiliary oil changes is: open the switch 33 between the fourth pipeline 5 and the main oil bag 8a, the eighth solenoid valve 30, the water ejector, the oil pump 7, the flow meter 21, the ninth solenoid valve 32, the third solenoid valve 24, and the switch 33 between the first pipeline 2 and the auxiliary oil bag 8, so that the oil in the main oil bag 8a is transferred to the auxiliary oil bag 8.

[0065] Auxiliary and main oil change: the oil in the auxiliary oil bag 8 is transferred to the main oil bag 8a. If the third hydraulic sensor indicates that there is no oil, it means that the auxiliary oil bag 8 has been drained, and if the first hydraulic sensor has oil, it means that the main oil bag 8a is full of oil; but if the third hydraulic sensor indicates that there is oil and the first hydraulic sensor also indicates that there is oil, it indicates a fault. The oil in the auxiliary oil bag 8 can be drained and cleaned. During the circulation process, the first hydraulic sensor and the first pressure sensor 13 are monitored. If the first hydraulic sensor has no oil but the first pressure sensor 13 indicates that the pressure is too high, the first solenoid valve 14 can be opened to exhaust.

[0066] The specific path of the auxiliary-main oil change is: open the switch 33 between the second pipeline 3 and the auxiliary oil bag 8, the fifth solenoid valve 26, the water ejector, the oil pump 7, the flow meter 21, the seventh solenoid valve 29, the switch 33 between the third pipeline 4 and the main oil bag 8a, so that the oil in the auxiliary oil bag 8 is transferred to the main oil bag 8a.

[0067] 5. Oil circuit cleaning

[0068] The main oil bag 8a is cleaned. At this time, the auxiliary oil bag 8 is free of oil. Oil is introduced through a port of the second pipe 3 away from the oil storage chamber. After the main oil bag 8a is filled with oil, the main oil bag 8a is drained.

[0069] The specific path is: first carry out the oil intake path of the main oil bag 8a described in the above 3 for 1-3 minutes, and then carry out the oil discharge path of the main oil bag 8a described in the above 1 after completion.

[0070] The water ejector 6, the oil pump 7, the flow meter 21, and various sensors and electromagnetic valves in the utility model are all electrically connected to the processor.

[0071] Furthermore, a flow meter 21 is provided at a port of the first pipe 2 and the third pipe 4 away from the oil storage chamber 1, and the flow meter 21 at the port is turned on when the port is used. The speed of the oil pump 7 is 600-700 rpm and 500 ml / min.

[0072] It should be noted that in the above embodiments, the description of each embodiment has its own emphasis, and for parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0073] Although the preferred embodiments of the utility model have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the utility model.

[0074] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. An environmentally friendly oil storage tank, characterized in that: It comprises an oil storage cavity (1), a first pipeline (2), a second pipeline (3), a third pipeline (4), a fourth pipeline (5), a water ejector (6), and an oil pump (7); The auxiliary oil bag (8) in the oil storage cavity (1) is connected to one end of the first pipeline (2) and the second pipeline (3); the other end of the first pipeline (2) is an oil return port, and the other end of the second pipeline (3) is an oil inlet, air inlet, or air inflation port; The main oil bag (8a) in the oil storage cavity (1) is connected to the third pipe (4) and one end of the fourth pipe (5), and the other end of the third pipe (4) is an oil discharge port; The other end of the fourth pipeline (5) is connected to a branch pipeline 1 (9) and a branch pipeline 2 (10); the branch pipeline 1 (9) is connected in series to the water ejector (6) and the oil pump (7) and then communicates with the first pipeline (2), so as to transport the oil in the main oil bag (8a) to the auxiliary oil bag (8) through the fourth pipeline (5), the branch pipeline 1 (9) and the first pipeline (2) in sequence; The second branch pipe (10) is connected to the second pipe (3), and the first branch pipe (9) is connected to the third pipe (4) and then to the first pipe (2), so that the oil in the auxiliary oil bag (8) is transported to the main oil bag (8a) through the second pipe (3), the second branch pipe (10), the first branch pipe (9), and the third pipe (4) in sequence.

2. The environmentally friendly oil storage tank according to claim 1, characterized in that: It also comprises a first gas pipeline (11) connected to the main oil bag (8a); when the main oil bag (8a) is taking in oil or drawing out air, the first gas pipeline (11) is opened to discharge air; when the main oil bag (8a) is discharging oil, the first gas pipeline (11) is opened to discharge air.

3. The environmentally friendly oil storage tank according to claim 1, characterized in that: It also comprises a second gas pipeline (17) connected to the auxiliary oil bag (8); when the auxiliary oil bag (8) takes in oil or draws air, the second gas pipeline (17) is opened to discharge air; when the auxiliary oil bag (8) discharges oil, the second gas pipeline (17) is opened to discharge air.

4. The environmentally friendly oil storage tank according to claim 2, characterized in that: The first gas pipeline (11) is serially connected with a first liquid level sensor (12), a first pressure sensor (13), and a first solenoid valve (14). The first solenoid valve (14) is arranged at an end away from the main oil bag (8a).

5. The environmentally friendly oil storage tank according to claim 3, characterized in that: The second gas pipeline (17) is connected in series with a second liquid level sensor (18), a second pressure sensor (19), and a second solenoid valve (20). The second solenoid valve (20) is arranged at an end away from the auxiliary oil bag (8).

6. The environmentally friendly oil storage tank according to claim 1, characterized in that: A flow meter (21) and a third pressure sensor (22) are provided on the pipe section between the branch pipe 1 (9) and the third pipe (4).

7. The environmentally friendly oil storage tank according to claim 6, characterized in that: A fourth pressure sensor (23) and a third solenoid valve (24) are sequentially arranged on the first pipeline (2); The second pipeline (3) is provided with a fourth solenoid valve (25), a fifth solenoid valve (26), and a third liquid level sensor (27) in sequence; The third pipeline (4) is provided with a sixth solenoid valve (28) and a seventh solenoid valve (29) in sequence; An eighth solenoid valve (30) and a fourth liquid level sensor (31) are sequentially arranged on the fourth pipeline (5); Wherein, the fourth pressure sensor (23) is arranged at the connection node between the first pipeline (2) and the branch pipeline 1 (9).

8. The environmentally friendly oil storage tank according to claim 7, characterized in that: A ninth solenoid valve (32) is provided on the pipe section between the first pipe (2) and the third pipe (4) on the branch pipe 1 (9).

9. The environmentally friendly oil storage tank according to claim 4, characterized in that: It also comprises a third gas pipeline (15) having one end connected to the first gas pipeline (11) and the other end connected to the water ejector (6), and a tenth solenoid valve (16) is provided on the third gas pipeline (15); The first pressure sensor (13) is arranged at a node on the first gas pipeline (11) where it is connected to the third gas pipeline (15).

10. The environmentally friendly oil storage tank according to claim 1, characterized in that: The first pipeline (2) and the third pipeline (4) are used to transport oil to the auxiliary oil bag (8) and the main oil bag (8a) respectively.

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