Leaking fuel handling device based on a diesel generator and diesel generator

Abstract

This invention provides a fuel leak treatment device and a diesel generator based on a diesel generator. An oil pump and a level sensor are installed in the fuel leak collection tank, which are connected to a control module. When the fuel level in the collection tank rises and a trigger moves from a first control position to a second control position, the oil pump is activated to transport the mixture collected in the fuel leak collection tank to the daily fuel tank. As the fuel level in the collection tank decreases and the trigger moves from the second control position back to the first control position, the oil pump stops operating. This invention provides a fuel leak treatment device and a diesel generator based on a diesel generator that can automatically recover and reuse the mixture collected in the fuel leak collection tank through the fuel line, avoiding system downtime for maintenance and effectively improving the working efficiency of the diesel generator.

Description

Technical Field

[0001] This utility model relates to the field of diesel generator technology, and in particular to a leak fuel treatment device based on a diesel generator and a diesel generator. Background Technology

[0002] In some domestically produced high-power diesel generator sets, the fuel pump of the electronically controlled unit pump diesel engine generates high-pressure fuel at the top of the plunger during operation. This high-pressure fuel leaks downwards through the gaps in the plunger assembly. Simultaneously, the cam chamber of the fuel pump is filled with engine oil. During operation, the fuel pump roller assembly converts the rotational motion of the camshaft into the linear up-and-down motion of the plunger. This rapid up-and-down movement of the plunger scrapes upwards the engine oil. The leaking high-pressure fuel and scraped engine oil are discharged through a zero-backpressure oil passage to a fuel leak collection tank to prevent leakage into the environment and pollution.

[0003] In existing technologies, maintenance personnel typically need to periodically empty the oil and diesel mixture collected in the fuel leak collection tank to prevent overflow and leakage when the tank is full. However, during generator operation, leaking high-pressure fuel and scraped oil are continuously generated. To prevent leakage, periodically emptying the mixture collected in the fuel leak collection tank often requires system shutdown, reducing the generator set's operating efficiency. Utility Model Content

[0004] Therefore, the purpose of this utility model is to provide a leaked fuel treatment device and a diesel generator based on a diesel generator, so as to solve the problem that the existing technology requires periodic shutdown to pour out the mixture collected in the fuel leak collection tank, which reduces the working efficiency of the generator set.

[0005] This utility model provides a fuel leak treatment device based on a diesel generator, wherein the diesel generator includes a fuel leak collection tank for collecting leaked fuel, and the fuel leak treatment device includes:

[0006] An oil pump is installed in the fuel leak collection tank, and the output pipeline of the oil pump is connected to the day fuel tank of the diesel generator;

[0007] A liquid level sensor is vertically installed in the fuel leak collection tank. The liquid level sensor includes a first control position and a second control position spaced apart from bottom to top, and a trigger element that can float up and down with the liquid level. The height of the first control position is higher than the height of the inlet of the input pipe of the oil pump.

[0008] A control module, connected to the level sensor and the oil pump, includes: a power supply, a main control relay, a first switch that can be switched to an on state when the trigger element leaves the first control position, and a second switch that can be switched to an on state when the trigger element is in the second control position.

[0009] The coils of the second switch, the first switch, and the main control relay are connected in series between the positive and negative terminals of the working power supply.

[0010] The first normally open contact switch of the main control relay is connected in parallel with the second switch;

[0011] The second normally open contact switch of the main control relay and the control circuit of the oil pump are connected in series between the positive and negative terminals of the working power supply.

[0012] Optionally, the liquid level sensor further includes a third control position disposed above the second control position, and the control module further includes a third switch that can be switched to an on state when the trigger is in the third control position, the third switch being connected in parallel with the second switch.

[0013] Optionally, the trigger includes two elements, and the two triggers are fixedly arranged at a distance in the vertical direction.

[0014] Optionally, the spacing between the two triggers is equal to the spacing between the second control bit and the third control bit.

[0015] Optionally, the level sensor includes a reed switch.

[0016] Optionally, a filter is also included, which is disposed at the end of the inlet pipe of the fuel leak collection tank.

[0017] Another aspect of this utility model provides a diesel generator, including the aforementioned leaked fuel treatment device based on the diesel generator.

[0018] This utility model provides a fuel leakage treatment device based on a diesel generator, comprising an oil pump and a level sensor installed in a fuel leakage collection tank. The level sensor and oil pump are connected to a control module, and the output pipeline of the oil pump is connected to the daily fuel tank of the diesel generator. During use, as the fuel level in the fuel leakage collection tank rises, the trigger moves from the first control position to the second control position. The first and second switches are then activated sequentially, energizing the coil of the main control relay. The first and second normally open contacts of the main control relay close, energizing the control circuit of the oil pump and controlling the oil pump to operate, transporting the mixture collected in the fuel leakage collection tank to the daily fuel tank. As the fuel level in the fuel leakage collection tank decreases, the trigger moves from the second control position, and the second switch opens. At this time, the coil of the main control relay can be kept energized through the first normally open contact switch. Until the fuel level further decreases, the trigger returns to the first control position, the first switch opens, the energizing circuit of the main control relay coil is disconnected, and the oil pump stops operating. The leaked fuel treatment device based on diesel generator provided by this utility model can automatically realize the recycling and reuse of the mixture collected in the fuel leak collection tank to the oil pipe, avoiding system downtime for maintenance and effectively improving the working efficiency of diesel generator. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the diesel generator-based fuel leakage treatment device of this utility model;

[0020] Figure 2 This is a schematic diagram of the control module structure of the diesel generator-based fuel leakage treatment device of this utility model.

[0021] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this utility model. Detailed Implementation

[0022] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0023] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0025] To address the problem in existing technologies where periodic shutdowns are required to empty the fuel leak collection tank, which reduces generator efficiency, this invention provides a fuel leak treatment device based on a diesel generator. The device includes an oil pump and a level sensor housed within the fuel leak collection tank. The level sensor and oil pump are connected to a control module, and the oil pump's output pipeline is connected to the diesel generator's fuel tank. During operation, as the fuel level in the collection tank rises, a trigger moves from the first control position to the second control position. The first and second switches are then activated sequentially, energizing the coil of the main control relay. This closes the first and second normally open contacts of the main control relay, energizing the oil pump's control circuit and controlling its operation to transport the fuel leak collection tank's mixture to the fuel tank. As the fuel level in the collection tank decreases, the trigger moves from the second control position, and the second switch opens. At this point, the first normally open contact maintains energization of the main control relay's coil. This continues until the fuel level drops further, at which point the trigger returns to the first control position, the first switch opens, the main control relay's coil energization circuit is broken, and the oil pump stops operating. It can automatically collect the mixture from the fuel leak collection tank and reuse it in the oil pipe, avoiding system downtime for maintenance and effectively improving the working efficiency of diesel generators.

[0026] Specifically, please refer to Figure 1 and Figure 2 The diagram shown is a schematic diagram of the structure of each part of the leaked fuel treatment device in this embodiment.

[0027] The fuel leakage treatment device in this embodiment is applied between the fuel leakage collection tank 11 and the daily fuel tank 12 of a diesel generator. When the fuel and engine oil mixture collected in the fuel leakage collection tank 11 reaches a certain amount, the mixture is automatically recycled and transported to the daily fuel tank 12 via the output pipeline 112 by the oil pump 21. This improves fuel utilization and reduces the need for system downtime maintenance and manual emptying of the fuel leakage collection tank 11. The oil content in the collected mixture is much smaller than the fuel content, ensuring reliable recycling.

[0028] The actual amount of fuel and engine oil leakage is very small. It takes a long time for the fuel leakage collection tank 11 to be filled (the threshold for discharge is corresponding to the liquid level height of the second control position 222). Under normal generator set conditions, the time to fill the tank is generally between 10 and 30 days, depending on the different specifications of the generator set. During this period, the fuel and engine oil mixture may separate into layers in the fuel leakage collection tank 11 due to settling. Since the density of engine oil is greater than that of diesel, the diesel will be located at the bottom layer.

[0029] When the fuel tank is full, diesel fuel can be preferentially extracted from the bottom of the fuel leak collection tank 11, which is located at the inlet of the fuel pump 21's input pipe. Simultaneously, the oil content in the mixture is extremely low; when the fuel level drops to the first control position 221, the oil layer has not yet reached the inlet of the fuel pump 21's input pipe. This reduces the risk of oil being transferred to the day fuel tank 12 and lowers the risk of damage caused by oil mixing into the generator set's fuel.

[0030] The specific height of the input port of the input pipeline of the first control position 221 and the oil pump 21 needs to be designed according to the actual amount of fuel and oil leakage of the generator. This application does not make any special restrictions on this.

[0031] The oil remaining on the upper layer still needs to be cleaned and drained regularly, but compared with existing technologies, it can effectively reduce the need for downtime maintenance and improve the working efficiency of the generator.

[0032] The control module is connected to the level sensor 22 and the oil pump 21 to control the operation of the oil pump 21 according to the output status of the level sensor 22.

[0033] like Figure 2 As shown, the control module mainly includes: a working power supply BT, a main control relay KA, a first switch K1 that can be switched to the on state when the trigger leaves the first control position 221, and a second switch K2 that can be switched to the on state when the trigger is in the second control position 222.

[0034] The coils of the second switch K2, the first switch K1, and the main control relay KA are connected in series between the positive and negative terminals of the working power supply BT; the first normally open contact switch KA1 of the main control relay KA is connected in parallel with the second switch K2; the second normally open contact switch KA2 of the main control relay KA and the control circuit of the oil pump 21 are connected in series between the positive and negative terminals of the working power supply BT.

[0035] As the liquid level in the fuel leak collection tank 11 rises, the trigger floats and rises, moving away from the first control position 221. The first switch K1 is turned on and maintained. When it reaches the second control position 222, the second switch K2 is turned on, and the coil of the main control relay KA is energized and the circuit is closed. The first normally open contact switch KA1 and the second normally open contact switch KA2 of the main control relay KA are activated and turned on. The second normally open contact switch KA2 is turned on, which energizes the control circuit of the oil pump 21. The oil pump 21 works and pumps the mixture in the fuel leak collection tank 11 to the day fuel tank 12.

[0036] After the oil pump 21 starts working, the liquid level in the fuel leak collection tank 11 continues to decrease, causing the trigger to descend and leave the second control position 222. The second switch K2 returns to the open state. At this time, the coil energization circuit of the main control relay KA can be maintained through the first normally open contact switch KA1, which is in the conducting state, thus maintaining the operation of the oil pump 21. When the trigger returns to the first control position, the first switch K1 opens, the coil energization circuit of the main control relay KA is disconnected, and the first normally open contact switch KA1 and the second normally open contact switch KA2 return to the open state. The control circuit of the oil pump 21 is disconnected, the oil pump 21 stops, and the pumping of oil ceases.

[0037] The pumping speed is generally much greater than the collection speed of the fuel leak collection tank 11, and there is no disturbance to the liquid level. The liquid level in the fuel leak collection tank 11 is raised again to the second control position 222, and the above actions are repeated. The whole process can automatically realize the recovery of the mixture collected by the fuel leak collection tank 11.

[0038] The first control position 221 can be equipped with a limit block to restrict the further downward movement of the trigger, so that when the fuel leak collection tank 11 is empty, the first switch K1 can be kept in the open state to avoid accidental triggering of the control.

[0039] To avoid the impact of control position failure on control reliability, in this embodiment, the liquid level sensor 22 also includes a third control position 223 disposed above the second control position 222. The control module also includes a third switch K3 that can be switched to the on state when the trigger is in the third control position 223. The third switch K3 is connected in parallel with the second switch K2 to provide redundant control.

[0040] like Figure 1As shown, in this embodiment, the first control position 221, the second control position 222, and the third control position 223 are evenly spaced. The height of the second control position 222 is generally greater than half the height of the fuel leak collection tank 11, so that the third control position 223 is located outside the fuel leak collection tank 11. To ensure the triggering of the third control position 223, two triggers are included, and the two triggers are fixedly arranged at a distance in the vertical direction (they can be connected by a lightweight plastic rod), so that the upper trigger can float to the third control position 223 outside the fuel leak collection tank 11.

[0041] The distance between the two triggers can be equal to the distance between the second control position 222 and the third control position 223, so as to facilitate the simultaneous triggering of the third switch K3 and the second switch K2, making the easy control threshold for the oil pump to start the same.

[0042] In an optional embodiment, the distance between the first control bit 221 and the second control bit 222 is less than the distance between the two triggers, so that the trigger located above can always be located above the second control bit 222, thus preventing the second control bit 222 from being accidentally triggered.

[0043] The liquid level sensor 22 includes a reed switch, which detects the liquid level based on the magnetic principle. The functional positions of the reed switch correspond to the various control positions, ensuring safety and reliability. Corresponding to the reed switch, the first switch K1, the second switch K2, and the third switch K3 can be selected as relay switches.

[0044] To ensure the purity of the recovered fuel, this embodiment also includes a filter 23, which is located at the end of the fuel leak collection tank 11's inlet pipe 111.

[0045] The filter 23 can be positioned higher than the second control position 222, thus preventing it from entering the mixture collected in the fuel leak collection tank 11. This ensures that the mixture collected in the fuel leak collection tank 11 is filtered, and it also facilitates the selection of a high-precision suspended filter, ensuring the quality of the recovered fuel. The filter 23 can also be configured for two-stage filtration, with the upper filter for large particles and the lower filter for small particles.

[0046] This utility model also provides a diesel generator, including the above-mentioned leaked fuel treatment device, which can automatically recover and transport the collected mixture to the daily fuel tank when the fuel leak collection tank 11 is full.

[0047] The leaked fuel treatment device and diesel generator provided by this utility model can automatically realize the recycling and reuse of the mixture collected in the fuel leak collection tank to the oil pipe, reduce the need for system downtime maintenance, and effectively improve the working efficiency of the diesel generator.

[0048] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0049] The embodiments described above are merely illustrative of several specific implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of protection of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the scope of protection of this utility model. Therefore, the scope of protection of this utility model patent should be determined by the appended claims.

Claims

1. A diesel generator-based leaked fuel treatment apparatus including a fuel leakage collection tank for collecting leaked fuel, characterized by, The leaked fuel treatment device includes: An oil pump is installed in the fuel leak collection tank, and the output pipeline of the oil pump is connected to the day fuel tank of the diesel generator; A liquid level sensor is vertically installed in the fuel leak collection tank. The liquid level sensor includes a first control position and a second control position spaced apart from bottom to top, and a trigger element that can float up and down with the liquid level. The height of the first control position is higher than the height of the inlet of the input pipe of the oil pump. A control module, connected to the level sensor and the oil pump, includes: a power supply, a main control relay, a first switch that can be switched to an on state when the trigger element leaves the first control position, and a second switch that can be switched to an on state when the trigger element is in the second control position. The coils of the second switch, the first switch, and the main control relay are connected in series between the positive and negative terminals of the working power supply. The first normally open contact switch of the main control relay is connected in parallel with the second switch; The second normally open contact switch of the main control relay and the control circuit of the oil pump are connected in series between the positive and negative terminals of the working power supply.

2. The fuel leakage treatment device based on a diesel generator according to claim 1, characterized in that, The liquid level sensor also includes a third control position disposed above the second control position, and the control module also includes a third switch that can be switched to an on state when the trigger is in the third control position, the third switch being connected in parallel with the second switch.

3. The fuel leakage treatment device based on a diesel generator according to claim 2, characterized in that, The triggering element comprises two elements, and the two triggering elements are fixedly arranged at a distance in the vertical direction.

4. The fuel leakage treatment device based on a diesel generator according to claim 3, characterized in that, The distance between the two triggers is equal to the distance between the second control bit and the third control bit.

5. The fuel leakage treatment device based on a diesel generator according to any one of claims 1 to 4, characterized in that, The liquid level sensor includes a reed switch.

6. The fuel leakage treatment device based on a diesel generator according to claim 1, characterized in that, It also includes a filter, which is located at the end of the inlet pipe of the fuel leak collection tank.

7. A diesel generator, characterized in that, Includes the diesel generator-based fuel leakage treatment device as described in any one of claims 1 to 6.

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