A method and apparatus for oil injection

Abstract

This invention discloses an oil injection method and apparatus, belonging to the field of liquid fuel transportation technology. This invention solves the problem that when a fuel supply system that has been idle for a long time cannot be put into use in an emergency due to the connection pipeline between the oil pump and the oil depot not being full of fuel oil. The oil injection method of this invention includes: determining whether to start the oil pump; if so, stopping the automatic injection of fuel into the first fuel supply pipeline; if not, automatically injecting fuel into the first fuel supply pipeline to keep it constantly full of fuel; one end of the first fuel supply pipeline is connected to the oil pump, and the other end is located in the oil depot. This invention enables continuous injection of fuel into the first fuel supply pipeline when the oil pump is not working, ensuring that the first fuel supply pipeline is always full of fuel. Starting the oil pump allows for immediate intake of fuel oil from the oil depot, meeting the needs of emergency use.

Description

Technical Field

[0001] This invention relates to the field of liquid fuel transportation technology, and in particular to an oil injection method and apparatus. Background Technology

[0002] Oil depots are specialized facilities for storing oil, including underground oil depots, which are located underground, such as buried oil tanks. Because underground oil depots are located underground, the oil pumps used to draw oil from them are located above ground. In order for the oil pumps to draw fuel oil from the underground oil depots, the oil pumps are connected to the underground oil depots via connecting pipelines. These connecting pipelines need to be filled with fuel oil before the oil pumps can draw fuel oil from the underground oil depots, ensuring the normal operation of the oil supply system.

[0003] The current method for injecting oil into the pipeline before the suction pump is as follows: a funnel is connected to the connecting pipeline, and fuel oil is manually injected through the funnel to fill the connecting pipeline.

[0004] If the fuel supply system is not in operation for a long time, the fuel shortage in the connecting pipeline will be large. When manually replenishing the fuel, a large amount of fuel oil needs to be transported, which is labor-intensive. Injecting the fuel oil into the connecting pipeline is time-consuming, which makes it take a long time to start the oil suction pump to draw up the fuel. As a result, the fuel supply system that has not been in operation for a long time cannot be put into use in time when an emergency is needed. Summary of the Invention

[0005] Based on the above analysis, the present invention aims to provide an oil injection method and system to solve the problem that the oil supply system, which has not been in operation for a long time, cannot be put into use in time when an emergency is needed because the connecting pipeline between the oil pump and the oil depot is not full of fuel oil.

[0006] The objective of this invention is mainly achieved through the following technical solutions:

[0007] In a first aspect, the present invention provides an oil injection method, comprising:

[0008] S1: Determine whether to start the oil suction pump. If yes, proceed to S2; otherwise, proceed to S3.

[0009] S2, stop automatic oil injection into the first oil supply pipeline;

[0010] S3, automatically inject oil into the first oil supply pipeline to keep the first oil supply pipeline full of oil.

[0011] One end of the first oil supply pipeline is connected to the oil suction pump, and the other end is located inside the oil depot.

[0012] Furthermore, S1 specifically refers to:

[0013] S11, obtain the current liquid level value of the oil stored in the oil-requiring end;

[0014] S12, determine whether the current liquid level has reached the preset low liquid level value. If yes, proceed to S13; otherwise, proceed to S14.

[0015] S13, start the oil suction pump, proceed to S2;

[0016] S14, without starting the oil suction pump, proceed to S3.

[0017] Furthermore, in S11, a level gauge is used to measure the level of the oil stored in the oil-requiring end.

[0018] Furthermore, S1 also includes:

[0019] S0, start the automatic or manual oiling operation.

[0020] Furthermore, S0 specifically refers to:

[0021] S01', determine whether the first oil supply pipeline is being used for the first time. If yes, proceed to S02'; otherwise, proceed to S03'.

[0022] S02', start the manual oil injection operation, inject oil into and fill the first oil supply pipe, complete the manual oil injection operation, and proceed to S1;

[0023] S03', start the automatic oil injection operation and enter S1.

[0024] Furthermore, S02' is specifically:

[0025] The oil is injected through the second oil injection pipe and fills the first oil supply pipe.

[0026] Furthermore, the oil tank automatically injects oil into the first oil supply pipeline through the first oil injection pipeline, and a first valve is installed on the first oil injection pipeline;

[0027] S2, specifically:

[0028] S21, close the first valve, and the passage of the first oil injection line is closed;

[0029] S22, stop the automatic filling of oil from the oil tank to the first oil supply pipeline.

[0030] Furthermore, S3 specifically refers to:

[0031] S31, open the first valve, and the passage of the first oil injection line is opened;

[0032] S32, the oil tank injects oil into the first oil supply pipeline through the first oil injection pipeline, so that the first oil supply pipeline is always full of oil.

[0033] Furthermore, the oil inlet of the oil tank is connected to the oil suction pump through a second oil supply pipeline, and the oil suction pump delivers oil to the oil tank.

[0034] Secondly, the present invention provides an oil injection device for implementing the oil injection method of the first aspect.

[0035] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0036] 1. The method of this invention maintains a continuous oil supply to the first oil supply pipeline when the oil suction pump is not working, ensuring that the first oil supply pipeline is always full of oil. In case of an emergency requiring the start of the common oil system, because the first oil supply pipeline is always full of oil, the oil suction pump can be started immediately to draw fuel oil from the oil depot and supply it to the oil-demanding end. This achieves the goal of the oil supply system being able to start and supply oil at any time. Since there is no need for manual oil injection into the first oil supply pipeline, it saves time and effort and is highly efficient.

[0037] 2. In the oil injection method of the present invention, by setting a liquid level measuring device in the oil injection tank, the oil level in the oil injection tank is monitored on the one hand, and the abnormal drop in the oil level in the oil injection tank is monitored on the other hand, so as to promptly remind the operators to troubleshoot the relevant faults.

[0038] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages may become apparent from the description or be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained through the embodiments described and the accompanying drawings, which are particularly pointed out. Attached Figure Description

[0039] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0040] Figure 1 This is a schematic flowchart of an oil injection method for an oil supply system according to the present invention;

[0041] Figure 2 for Figure 1 A schematic diagram illustrating whether the oil suction pump is activated.

[0042] Figure 3 A flowchart illustrating the process of initiating automatic or manual oiling operations;

[0043] Figure 4 This is a schematic diagram of the connection between an oil injection device and an oil supply unit according to the present invention;

[0044] Figure 5 for Figure 4Schematic diagrams of the automatic and manual oiling units;

[0045] Figure 6 A schematic diagram of an oil injection device including four automatic oil injection units;

[0046] Figure label:

[0047] 1- Oil supply unit, 2- Oil injection unit;

[0048] 11-Oil depot, 12-First oil supply pipeline, 13-Oil suction pump, 14-Second oil supply pipeline;

[0049] 21-Automatic oil injection unit, 22-Manual oil injection unit, 23-Check valve;

[0050] 211-Oil tank, 212-First oil filling line, 213-First valve;

[0051] 221-Oil injection funnel, 222-Second oil injection line, 223-Manual valve. Detailed Implementation

[0052] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0053] Example 1

[0054] One specific embodiment of the present invention discloses an oil injection method suitable for an oil supply system, such as... Figure 1 As shown, it includes:

[0055] S1, determine whether to start the oil suction pump 13. If yes, proceed to S2; if no, proceed to S3.

[0056] S2, stop automatic oil injection into the first oil supply pipe 12;

[0057] S3, automatically inject oil into the first oil supply pipe 12 to keep the first oil supply pipe 12 full of oil.

[0058] In this embodiment, the fuel oil injected into the first oil supply pipeline 12 is the same as the fuel oil stored in the oil depot 11.

[0059] In this embodiment, automatic oil injection is achieved through an automatic oil injection unit 21, which includes an oil injection tank 211. The oil injection tank 211 is connected to the first oil supply pipeline 12 to inject fuel oil into the first oil supply pipeline 12.

[0060] The method in this embodiment maintains a continuous flow of oil into the first oil supply pipeline when the suction pump is not operating, ensuring that the first oil supply pipeline remains fully filled with oil. In case of an emergency requiring the activation of the fuel supply system, the suction pump can be started immediately because the first oil supply pipeline is always full of oil. This allows for the immediate intake of fuel oil from the oil depot and its supply to the demanding end, enabling the fuel supply system to be activated and supplied with oil at any time, saving time and effort while maintaining high efficiency.

[0061] Furthermore, the oil suction pump is connected to the oil demand end for oil supply; a liquid level measuring device is installed in the oil demand end to measure the liquid level of fuel oil in the oil demand end, thereby determining whether the oil demand end needs to input fuel oil;

[0062] like Figure 2 As shown, S1 is specifically:

[0063] S11, The liquid level measuring device measures the current liquid level value of the oil in the oil-requiring end;

[0064] S12, determine whether the current liquid level has reached the preset low liquid level value. If yes, proceed to S13; otherwise, proceed to S14.

[0065] S13, start oil suction pump 13, enter S2;

[0066] S14, without starting the oil suction pump 13, proceed to S3.

[0067] In this embodiment, the oil suction pump and the liquid level measuring device are interlocked. That is, the computer is connected to the oil suction pump and the liquid level measuring device respectively. Based on the oil level value in the oil storage at the oil demand end measured by the liquid level measuring device, it determines whether to start the oil suction pump. When the oil level value in the oil demand end is insufficient to maintain the oil supply to users such as diesel generator sets, the oil suction pump is started to deliver oil to the oil demand end to ensure that there is enough fuel oil at the oil demand end.

[0068] Furthermore, since the oil suction pump is installed above the oil depot, and considering that the oil suction pump can only draw fuel oil from the oil depot and cannot draw fuel oil from the automatic oil injection unit, the automatic oil injection unit 21 also includes a first oil injection pipeline 212 and a first valve 213. One end of the first oil injection pipeline 212 is connected to the oil injection tank 211, and the other end is connected to the first oil supply pipeline 12. The first valve 213 is installed on the first oil injection pipeline 212 and is used to control the opening and closing of the first oil injection pipeline 212.

[0069] In this embodiment, when the first valve 213 is installed on the first oil injection line 212, S2 is specifically as follows:

[0070] S21, close the first valve 213, and the passage of the first oil injection line 212 is closed;

[0071] S22, the oil tank 211 stops automatically filling the first oil supply pipe 12 with oil.

[0072] In this embodiment, when the first valve 213 is installed on the first oil injection line 212, S3 specifically is as follows:

[0073] S31, the first valve 213 is opened, and the passage of the first oil injection line 212 is opened;

[0074] S32, the oil tank 211 injects oil into the first oil supply pipe 213 through the first oil injection pipe 212, so that the first oil supply pipe 213 is kept full of oil.

[0075] In this embodiment, the opening and closing of the first oil injection pipeline 212 is controlled by opening and closing the first valve 213. Specifically, when the first valve 213 is opened, the passage of the first oil injection pipeline 212 is opened, and the oil injection tank 211 injects oil into the first oil supply pipeline 12 through the first oil injection pipeline 212; when the first valve 213 is closed, the passage of the first oil injection pipeline 212 is blocked, so that the oil injection tank 211 does not inject oil into the first oil supply pipeline 12.

[0076] In this embodiment, the oil suction pump 13 is interlocked with the first valve 213. Specifically, the computer is connected to both the oil suction pump 13 and the first valve 213. The computer determines whether to open or close the first valve 213 based on the operation of the oil suction pump 13. When the oil suction pump 13 is working, the first valve 213 is closed, and the oil tank 211 stops supplying oil to the first oil supply pipe 12. Fuel oil is only drawn from the oil reservoir 11. The fuel oil then flows from the oil reservoir 11, sequentially through the first oil supply pipe 12, the oil suction pump 13, and the oil supply pipe to the demand end, ultimately delivering oil to the demand end. When the oil suction pump 13 is not working, the first valve 213 is open, and the oil tank 211 continuously supplies oil to the first oil supply pipe 12.

[0077] For example, the first valve 213 is preferably an electric valve, which makes the first valve 213 easy to control.

[0078] Furthermore, such as Figure 4 and Figure 5 As shown, the oil injection unit also includes a manual oil injection unit 22, which includes a second oil injection line 222. Before S1, it also includes:

[0079] S0, initiate automatic or manual oiling operation, such as Figure 3 As shown, specifically:

[0080] S01' Determine whether the oil supply system is being used for the first time. If yes, proceed to S02'; otherwise, proceed to S03'.

[0081] S02', start the manual oil injection operation, manually inject oil into the first oil supply pipe 12 through the second oil injection pipe 222, and fill the first oil supply pipe 12 with oil, complete the manual oil injection operation, and enter S1;

[0082] S03', start the automatic oil injection operation and enter S1.

[0083] In this embodiment, considering that the fuel supply system is put into operation for the first time or there is no fuel oil in the fuel tank, a manual fuel injection unit 22 is set on the fuel supply system. The manual fuel injection unit 22 includes a second fuel injection pipeline 222, which is connected to the first fuel supply pipeline 12, so as to realize the fuel oil injection and filling of the first fuel supply pipeline 12 manually.

[0084] The operator injects oil into the first oil supply pipe 12 through the second oil injection line 222 and fills the first oil supply pipe 12 with oil. This is called manual oil replenishment. Manual oil replenishment ensures that the oil supply system, including the oil suction pump 13, the first oil supply pipe 12 and the oil depot 11, can be started normally when it is put into use for the first time. On the other hand, it can also be used in conjunction with the automatic oil injection unit 21 for adaptive switching.

[0085] In this embodiment, the manual oil injection unit 22 further includes a manual valve 223, which is installed on the second oil injection pipeline 222 to control the opening and closing of the second oil injection pipeline 222. Specifically, when the manual valve 223 is open, oil is manually injected into the first oil supply pipeline 12 through the second oil injection pipeline 222. When the manual valve 223 is closed, the second oil injection pipeline 222 is blocked, ensuring that the oil suction pump 13 can only draw fuel oil from the oil depot 11, and preventing debris from entering the first oil supply pipeline 12 through the second oil injection pipeline 222. The fuel oil injected into the first oil supply pipeline 12 through the second oil injection pipeline 222 is the same as the fuel oil stored in the oil depot 11.

[0086] Furthermore, when the oil-requiring end in S11 is an oil filling tank, the liquid level in the oil filling tank is measured by a liquid level measuring device installed inside it. The oil filling tank is a daily-use oil tank and / or a dedicated oil filling tank. The liquid level in the oil filling tank is also used to determine whether there is a malfunction in the passage formed by the automatic oil filling unit 21, the first oil supply pipe 12, and the check valve 23. Specifically:

[0087] A1. Determine whether the fuel tank is a day-use fuel tank or a special-purpose fuel tank. If it is a day-use fuel tank, proceed to A2; if it is a special-purpose fuel tank, proceed to A4.

[0088] A2, retrieve the current level of the daily fuel tank;

[0089] A3: Determine whether the current liquid level in the daily fuel tank is lower than the first preset low liquid level threshold. If yes, the amount of fuel in the daily fuel tank has decreased abnormally, and proceed to A6; otherwise, return to A2.

[0090] In A3, the first preset low liquid level threshold is the liquid level value corresponding to the remaining oil in the daily fuel tank. The remaining oil in the daily fuel tank = the maximum total oil storage in the daily fuel tank - the total oil supplied to users such as diesel generator sets - the maximum amount of oil required to inject oil into the first oil supply pipeline.

[0091] A4, retrieve the current liquid level value of the dedicated oil filling tank;

[0092] A5: Determine whether the current liquid level in the dedicated oil filling tank is lower than the second preset low liquid level threshold. If yes, the oil level in the dedicated oil filling tank has decreased abnormally, then proceed to A6; otherwise, return to A4.

[0093] In A5, the second preset low liquid level threshold is the liquid level value corresponding to the remaining oil volume of the dedicated oil filling tank. The remaining oil volume of the dedicated oil filling tank = the maximum total oil volume of the dedicated oil filling tank - the maximum amount of oil required to fill the first oil supply pipeline.

[0094] A6 indicates a fault.

[0095] In this embodiment, by installing a liquid level measuring device in the oil filling tank, the change in the liquid level value of the oil filling tank is measured. When the liquid level value is lower than the preset low liquid level threshold, the oil in the oil filling tank is abnormally reduced, indicating that there is an oil leakage fault in the self-filling oil tank 211, the first oil filling pipeline 212, the first oil supply pipeline 12 and the check valve 23, prompting the operating personnel to conduct on-site troubleshooting of the oil filling tank 211, the first oil filling pipeline 212, the first oil supply pipeline 12 and the check valve 23.

[0096] Furthermore, when multiple oil suction pumps 13 are installed, an oil depot 11 is connected to multiple oil suction pumps 13 through a first oil supply pipe 12, and the multiple oil suction pumps 13 are connected in parallel on the first oil supply pipe 12. The switch of any oil suction pump 13 is interlocked with the automatic oil injection unit on the first oil supply pipe 12. When multiple oil suction pumps 13 are installed, the steps before S1 are as follows:

[0097] B1, determine the number of oil suction pumps 13 connected to the first oil supply pipeline. If there is one, proceed to S1; if there are two or more, proceed to B2.

[0098] B2 determines whether any one of the two or more oil suction pumps is running. If yes, proceed to B3; otherwise, proceed to B4.

[0099] B3, cut off the oil supply from all automatic oil injection units to the first oil supply pipe 12;

[0100] B4. Based on the automatic oiling method, the corresponding automatic oiling unit is activated to inject oil into the first oil supply pipe 12, so that the first oil supply pipe 12 is kept full of oil.

[0101] In this embodiment, in D3, the automatic oil injection method includes selecting any one automatic oil injection unit to inject oil into the first oil supply pipeline, and selecting any two or more automatic oil injection units to inject oil into the first oil supply pipeline.

[0102] Among them, the process of two or more automatic oil injection units injecting oil into the first oil supply pipeline also includes two or more automatic oil injection units injecting oil into the first oil supply pipeline simultaneously, and two or more automatic oil injection units switching to inject oil into the first oil supply pipeline.

[0103] Example 2

[0104] Another specific embodiment provided by the present invention, such as Figure 4 and Figure 5 As shown, an oil injection device is disclosed, which is installed on an oil supply system. The oil supply system includes an oil supply unit 1, which includes an oil tank 11, a first oil supply pipeline 12, and an oil suction pump 13 connected in sequence. The oil injection device includes an automatic oil injection unit 21, a manual oil injection unit 22, and a check valve 23. The automatic oil injection unit 21 includes an oil injection tank 211, a first oil injection pipeline 212, and a first valve 213. The upper end of the first oil injection pipeline 212 is connected to the inside of the oil injection tank 211, and the lower end is connected to the first oil supply pipeline 12. The first valve 213 is installed on the first oil injection pipeline 212 to control the opening and closing of the first oil injection pipeline 212, thereby realizing whether to automatically inject oil into the first oil supply pipeline 12. The manual oil filling unit 22 includes an oil filling funnel 221, a second oil filling pipeline 222, and a manual valve 223. The upper end of the second oil filling pipeline 222 is connected to the oil filling funnel 221, and the lower end is connected to the first oil supply pipeline 12. The manual valve 223 is installed on the second oil filling pipeline 222 and is used to open and close the passage of the second oil filling pipeline 222. The check valve 23 is installed at the oil inlet of the first oil supply pipeline 12.

[0105] To facilitate easier modification, the oil injection device also includes a tee, with the first port of the tee connected to the first oil supply pipe 12, the second port connected to the first oil injection pipe 212, and the third port connected to the second oil injection pipe 222.

[0106] In this embodiment, the check valve 23 is installed at the inlet of the first oil supply pipeline 12. When the oil suction pump 13 is in operation, the check valve 23 is open, allowing fuel oil in the oil tank 11 to enter the first oil supply pipeline 12; when the oil suction pump 13 is not in operation, the check valve 23 is closed, preventing fuel oil in the first oil supply pipeline 12 from flowing out.

[0107] In this embodiment, the automatic fuel injection unit 21 continuously injects fuel oil into the first fuel supply pipe 12 when the fuel suction pump 13 is not working, ensuring that the first fuel supply pipe 12 is always full of fuel oil. When the fuel supply system encounters an emergency, because the first fuel supply pipe 12 is always full of fuel oil, the fuel suction pump 13 is activated to immediately draw fuel oil from the oil depot 11 and supply it to the end that needs fuel. This allows the fuel supply system to start up and supply fuel oil immediately. Since there is no need to manually inject fuel into the first fuel supply pipe, it saves time and effort and is highly efficient.

[0108] Furthermore, to ensure that the first fuel supply pipe 12 is quickly filled with fuel oil without interruption, the first fuel supply pipe 12 is connected to at least one automatic fuel injection unit 21, such as... Figure 6 As shown, two or more automatic oil injection units 21 are connected in parallel to the first oil supply pipeline 12.

[0109] In this embodiment, multiple automatic oil injection units 21 are connected in parallel to the first oil supply pipeline 12. Each automatic oil injection unit 21 is equipped with an electric valve, which is connected to a computing computer. The computing computer controls the synchronous switching or switching of one or more electric valves as needed, thereby enabling any one automatic oil injection unit 21 to inject oil into the first oil supply pipeline or enabling any two or more automatic oil injection units 21 to inject oil into the first oil supply pipeline simultaneously or in a switching manner.

[0110] For example, if four automatic oil injection units are set, any one of them can be selected to inject oil into the first oil supply pipeline at the same time; or any two or more automatic oil injection units can be selected to inject oil into the first oil supply pipeline at the same time or switch between them.

[0111] For example, such as Figure 6 As shown, taking four automatic oil injection units as an example, the specific method for switching to inject oil into the first oil supply pipeline is as follows: if the remaining oil in the oil tank of the first automatic oil injection unit is insufficient to fill the first oil supply pipeline, the active oil injection operation of the first automatic oil injection unit is stopped by closing the electric valve of the first automatic oil injection unit, and another one or more automatic oil injection units are switched to continue to actively inject oil into the first oil supply pipeline, so that the first oil supply pipeline can be quickly filled with oil and further ensure that it can be put into use immediately.

[0112] In this embodiment, all the oil tanks in the multiple automatic oil filling units are dedicated oil filling tanks, which are oil tanks specifically used for filling the first oil supply pipeline.

[0113] In this embodiment, all the fuel tanks in the multiple automatic fuel filling units are daily fuel tanks. The daily fuel tanks are located between the fuel depot and the diesel generator set. The fuel depot first delivers fuel oil to the daily fuel tanks, and then the daily fuel tanks deliver it to the diesel generator set.

[0114] In this embodiment, some of the oil tanks in the multiple automatic oil filling units are dedicated oil filling tanks, while others are daily use oil tanks, which are used by operators as needed.

[0115] Furthermore, the oil supply unit 1 also includes a second oil supply pipeline 14, and the first oil supply pipeline 12, the oil suction pump 13 and the second oil supply pipeline 14 are connected in sequence; through the first oil supply pipeline 12, the oil suction pump 13 and the second oil supply pipeline 14, the oil depot 11 supplies oil to the oil filling tank 211.

[0116] In this embodiment, when the fuel tank 211 is a dedicated fuel tank, fuel oil is supplied to the dedicated fuel tank through the second fuel supply pipe 14 and the oil depot 11 to ensure that there is enough fuel oil in the dedicated fuel tank to fill the first fuel supply pipe, so that the first fuel supply pipe is kept full, so that the oil suction pump can be started at any time to meet the needs of emergency use.

[0117] In this embodiment, when the fuel tank is a day-use fuel tank, fuel oil is supplied from the oil depot to the fuel tank through the second fuel supply pipeline to ensure that the fuel tank contains sufficient fuel oil. This serves two purposes: firstly, supplying fuel oil to users such as diesel generator sets; and secondly, filling the first fuel supply pipeline with fuel oil to ensure the first fuel supply pipeline is full, allowing the fuel pump to start at any time and meet emergency needs. For example, when the fuel tank is a day-use fuel tank, the bottom of the day-use fuel tank is connected to the first fuel supply pipeline through a first fuel filling pipeline. Simultaneously, an electric valve is installed on the first fuel filling pipeline. By opening and closing the electric valve, the day-use fuel tank automatically fills the first fuel supply pipeline. In this case, the day-use fuel tank has both the function of supplying fuel to users such as diesel generators and the function of automatically filling the first fuel supply pipeline.

[0118] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. An oil injection method, characterized in that, Applied to an oil injection device, the oil injection device comprising: The fuel supply unit includes an oil reservoir, a first fuel supply pipeline, and a fuel pump. One end of the first fuel supply pipeline is connected to the fuel pump, and the other end extends into the oil reservoir. A check valve is installed at the inlet of the first fuel supply pipeline. When the fuel pump is in operation, the check valve opens, allowing fuel oil in the oil reservoir to enter the first fuel supply pipeline. When the fuel pump is not in operation, the check valve closes, preventing fuel oil from flowing out of the first fuel supply pipeline. An automatic oil filling unit, comprising an oil filling tank, a first oil filling pipeline, and a first valve; The oil suction pump and the first valve are interlocked. When the oil suction pump is not working, the first valve is open, and the oil tank continuously injects oil into the first oil supply pipeline. The oil injection method includes: S1: Determine whether to start the oil suction pump. If yes, proceed to S2; otherwise, proceed to S3. S2, stop automatic oil injection into the first oil supply pipeline; S3, automatically inject oil into the first oil supply pipe to keep the first oil supply pipe full of oil.

2. The oil injection method according to claim 1, characterized in that, Specifically, S1 is: S11, obtaining the current liquid level value of the oil stored in the oil-requiring end; S12, determine whether the current liquid level has reached the preset low liquid level value. If yes, proceed to S13; if no, proceed to S14. S13, Start the oil suction pump and proceed to S2; S14, without starting the oil suction pump, proceed to S3.

3. The oil injection method according to claim 2, characterized in that, In S11, a level gauge is used to measure the level of the oil stored in the oil-requiring end.

4. The oil injection method according to claim 1, characterized in that, Before S1, the following also applies: S0, start the automatic or manual oiling operation.

5. The oil injection method according to claim 4, characterized in that, Specifically, S0 refers to: S01': Determine if the oil supply system is being used for the first time. If yes, proceed to S02'; otherwise, proceed to S03'. S02', start the manual oil injection operation, inject oil into and fill the first oil supply pipe, complete the manual oil injection operation, and proceed to S1; S03', start the automatic oil injection operation and enter S1.

6. The oil injection method according to claim 5, characterized in that, Specifically, S02' is: The oil is injected through the second oil injection line to fill the first oil supply line.

7. The oil injection method according to claim 1, characterized in that, The oil tank automatically injects oil into the first oil supply pipeline through the first oil injection pipeline, and a first valve is installed on the first oil injection pipeline; Specifically, S2 is: S21, close the first valve, and the passage of the first oil injection pipeline is closed; S22, stop the automatic oil filling of the oil tank into the first oil supply pipeline.

8. The oil injection method according to claim 7, characterized in that, Specifically, S3 is: S31, the first valve is opened, and the passage of the first oil injection pipeline is opened; S32, the oil tank injects oil into the first oil supply pipe through the first oil injection pipeline, so that the first oil supply pipe is always full of oil.

9. The oil injection method according to claim 7, characterized in that, The oil inlet of the oil tank is connected to the oil suction pump through a second oil supply pipe, and the oil suction pump delivers oil to the oil tank.

Images