Diesel engine cooling water system capable of automatically supplementing water in water return pool

Abstract

The utility model discloses a diesel engine cooling water system capable of automatically supplementing water in a water return pool, which comprises a cooling tower connected with a diesel engine through a liquid inlet pipeline and the water return pool connected with the diesel engine through a liquid outlet pipeline, the water return pool is connected with the cooling tower through a return pipeline, and a float switch is arranged in the water return pool. The floating ball switch is triggered when the water level of the water return pool is lower than a set value, a water supplementing pipeline is further arranged between the water return pool and the cooling tower, a water supplementing pump is arranged on the water supplementing pipeline and connected with a water level controller, and the water level controller is used for controlling the water supplementing pump to be started when the floating ball switch is triggered. The device can realize automatic water replenishing control of the water level of the water return pool, can effectively avoid long-time low-load operation of the submerged pump, prolongs the service life of equipment, and simultaneously reduces the labor cost; a change-over switch between an automatic mode and a manual mode is arranged through the water level controller, water can be manually supplemented when an automatic device is overhauled, and the operation stability of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of diesel engine cooling, in particular to a diesel engine cooling water system with automatic water replenishment in a return water tank. Background Art

[0002] The diesel engine cooling water system is responsible for absorbing the heat of the moving parts of the diesel engine. When the diesel engine is working, the cooling water in the cooling tower flows through the moving parts of the diesel engine through the pipeline driven by the seawater pump, and at the same time absorbs the heat emitted by the moving parts of the diesel engine. The cooling water with heat returns to the return water tank through the pipeline, and then is pumped to the cooling tower through the pipeline by the submersible pump in the return water tank for cooling. After the water is cooled, it is sucked into the diesel engine again by the seawater pump, thereby absorbing heat, releasing heat, and circulating over and over again to achieve the purpose of circulating water cooling of the diesel engine.

[0003] However, in the existing diesel engine commissioning cooling circulating water system, the water replenishment operation of the cooling tower return water tank is all controlled manually, and the diesel engine return water volume is difficult to control accurately, and the operators are part-time staff and cannot be on duty on site for a long time. When the water level in the return water tank is low, the submersible pump will run at low load for a long time and cause equipment damage; when the diesel engine return water volume is large and the submersible pump cannot be pumped in time, the return water will exceed the maximum liquid level and easily cause water overflow, resulting in an increase in production costs such as equipment maintenance costs and water charges. Therefore, it is necessary to design a special return water tank replenishment device that can replenish water from the cooling tower to the return water tank in time. Utility Model Content

[0004] The utility model aims to provide a diesel engine cooling water system with automatic water replenishment to a return water tank, thereby solving the problem that the cooling tower in the existing diesel engine water replenishment system cannot automatically replenish water to the return water tank.

[0005] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0006] A diesel engine cooling water system with automatic water replenishment in a return water tank comprises a cooling tower connected to the diesel engine through a liquid inlet pipe, and a return water tank connected to the diesel engine through a liquid outlet pipe, the return water tank is connected to the cooling tower through a reflux pipe, a float switch is arranged in the return water tank, the float switch is triggered when the water level in the return water tank is lower than a set value, a replenishment pipe is also arranged between the return water tank and the cooling tower, a replenishment water pump is arranged on the replenishment water pipe, the replenishment water pump is connected to a water level controller, and the water level controller is used to control the replenishment water pump to start when the float switch is triggered.

[0007] Furthermore, a submersible pump for pumping water from a pumping pipe is provided in the return water tank.

[0008] Furthermore, the water level controller is provided with two modes, automatic and manual, and is provided with a conversion switch for switching to the automatic mode or the manual mode.

[0009] Furthermore, the water level controller and the submersible pump are powered by the same power source.

[0010] The beneficial effects of the utility model are as follows: (1) The device can realize automatic water replenishment control of the water level of the return water tank, which can effectively prevent the submersible pump from operating at low load for a long time, prolong the service life of the equipment, and reduce labor costs. (2) By setting a switch between automatic and manual modes on the water level controller, manual water replenishment can be performed when the automatic device is under maintenance, thereby improving the operating stability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0012] Figure 2 This is a schematic diagram of the control flow of the utility model.

[0013] In the figure: 1. Diesel engine; 2. Cooling tower; 3. Return water tank; 4. Water pump; 5. Liquid inlet pipe; 6. Liquid outlet pipe; 7. Return pipe; 8. Water supply pipe; 9. Float switch; 10. Water level controller; 11. Submersible pump. DETAILED DESCRIPTION

[0014] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0015] like Figure 1-2 As shown, a diesel engine cooling water system with automatic water replenishment in a return water tank comprises a cooling tower 2 connected to a diesel engine 1 via a liquid inlet pipe 5, and a return water tank connected to the diesel engine 1 via a liquid outlet pipe 6, the return water tank is connected to the cooling tower 2 via a reflux pipe 7, a float switch 9 is provided in the return water tank 3, the float switch 9 is triggered when the water level in the return water tank 3 is lower than a set value, a replenishment pipe 8 is further provided between the return water tank 3 and the cooling tower 2, a replenishment water pump 4 is provided on the replenishment water pipe 8, the replenishment water pump 4 is connected to a water level controller 10, and the water level controller is used to control the replenishment water pump 4 to start when the float switch 9 is triggered.

[0016] Working principle: The model of the float switch 9 is EM15-2, and the model of the water level controller 10 is C61F-GP. Since the bottom of the float switch 9 is connected to the float on the water surface of the return pool, its height will change with the liquid level of the cooling water in the return pool 3. When the water level of the return pool 3 is lower than the set value, the system will control the opening of the water pump 4 by closing the contacts in the float switch 9. At this time, the cooling water in the cooling tower 2 is pumped to the return pool 3 through the water supply pipe 8 by the water pump 4 for water supply. After exceeding a certain height of the low water level line, the float position rises so that the contacts inside it control the water pump 4 to stop running, thereby realizing automatic water supply control of the water level of the return pool.

[0017] Preferably, a submersible pump 11 for pumping water from the pumping pipe 7 is provided in the return water tank 3, and a low water level line can be set according to the inlet height of the submersible pump 11, thereby effectively avoiding the submersible pump from operating at low load for a long time and extending the service life of the equipment.

[0018] Preferably, the water level controller 10 is provided with two modes, automatic and manual, and is provided with a conversion switch for switching to automatic mode or manual mode. When the automatic device needs maintenance, the manual mode can be turned on by the conversion switch, and manual water replenishment can be performed by manually starting the water pump 4 (the water pump 4 cannot be manually started when the water level controller 10 is in automatic mode), thereby ensuring the operating stability of the device.

[0019] Preferably, the water level controller 10 and the submersible pump 11 are powered by the same power supply, so that the water level controller 10 can be stopped and started synchronously with the submersible pump 11. If the submersible pump 11 needs maintenance, the water level controller 10 can be shut down synchronously (compared to the water level controller 10 being connected to a power supply separately). If the submersible pump 11 operates normally, the power supply of the water level controller 10 is uninterrupted (compared to the water level controller 10 sharing a power supply with the electric pump 4).

[0020] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

Claims

1. A diesel engine cooling water system with automatic water replenishment in a return water tank, comprising a cooling tower (2) connected to a diesel engine (1) via a liquid inlet pipe (5), and a return water tank connected to the diesel engine (1) via a liquid outlet pipe (6), wherein the return water tank is connected to the cooling tower (2) via a return pipe (7), characterized in that: A float switch (9) is provided in the return water tank (3), and the float switch (9) is triggered when the water level of the return water tank (3) is lower than a set value. A water supply pipe (8) is also provided between the return water tank (3) and the cooling tower (2), and a water supply pump (4) is provided on the water supply pipe (8). The water supply pump (4) is connected to a water level controller (10), and the water level controller is used to control the water supply pump (4) to start when the float switch (9) is triggered.

2. A diesel engine cooling water system with automatic water replenishment in a return water tank according to claim 1, characterized in that: The return water tank (3) is provided with a submersible pump (11) for pumping water for the return pipe (7).

3. A diesel engine cooling water system with automatic water replenishment in a return water tank according to claim 1, characterized in that: The water level controller (10) is provided with two modes, automatic and manual, and is provided with a conversion switch for switching to the automatic mode or the manual mode.

4. A diesel engine cooling water system with automatic water replenishment in a return water tank according to claim 2, characterized in that: The water level controller (10) and the submersible pump (11) are powered by the same power source.

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