Cooling system of diesel fork lift truck
By introducing degassing pipes and coolant filling pipes into the internal combustion forklift cooling system, the problem of slow air formation and coolant filling speed of the engine is solved, and more efficient engine heat dissipation and coolant management is achieved.
Patent Information
- Application Number
- CN202421402140.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-19
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-06-19
AI Technical Summary
The existing internal combustion forklift cooling systems have the problem that air is prone to formation, resulting in reduced engine cooling performance, and the lack of a separate coolant filling pipe, resulting in slow cooling rate and easy injection into the engine with air.
An internal combustion forklift cooling system is designed, including a radiator, a coolant circulation tube, a liquid pump, a coolant filling tube and a secondary water tank. By setting up a degassing pipe and a coolant filling pipe, the timely removal of air in the coolant and the rapid filling of the coolant can be achieved.
Effectively eliminate air inside the engine, improve engine heat dissipation efficiency, ensure fast cooling liquid filling speed, reduce the possibility of air and coolant injecting into the engine at the same time, and extend the service life of the coolant.
Smart Images
Figure CN222668263U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of forklifts, in particular to a cooling system for an internal combustion forklift. Background Art
[0002] The engine radiator has the function of dissipating heat for the turbocharger intake system and the engine body, such as Figure 4 and Figure 5 As shown, first, after the air enters the turbocharger of the engine, it is compressed by the engine's supercharger and the temperature is raised. After entering the intercooler intake pipe, it enters the radiator intercooler for cooling. After the cooled air enters the intercooler outlet pipe, it enters the engine to provide the engine with the required combustion air. When the engine runs to a certain stage and the temperature rises to a certain temperature, the coolant in the engine coolant circulation pipeline enters the coolant outlet pipe and enters the radiator liquid tank for cooling. After the cooled coolant enters the coolant return pipe, it returns to the engine's coolant circulation pipeline to cool the engine, so that the engine always works within the appropriate temperature range. The existing internal combustion forklift cooling system has the following problems:
[0003] (1) Air is easily formed inside the engine, which reduces the cooling performance of the engine and even reduces the cooling capacity of the engine, resulting in local high temperature and damage;
[0004] (2) There is no separate coolant filling pipe. The coolant is filled by flowing in through the coolant outlet pipe and exhausted by the coolant outlet pipe. The coolant filling speed is slow and it is easy to inject air and coolant into the engine at the same time, pouring down from high to low inside the engine and radiator, forming bubbles inside the engine and its pipes, making it difficult to exhaust all the air. Utility Model Content
[0005] The utility model aims to solve one of the technical problems in the related art to at least a certain extent. To this end, one purpose of the utility model is to provide an internal combustion forklift cooling system, which can timely remove the air precipitated from the coolant without affecting the heat dissipation of the engine, and at the same time has a separate coolant filling pipeline, and the coolant filling speed is fast.
[0006] According to the utility model, a cooling system for an internal combustion forklift truck includes a radiator, a coolant circulation pipe arranged inside the engine to dissipate heat for the engine, and a liquid pump that pumps the coolant inside the coolant circulation pipe into the radiator, the outlet of the coolant circulation pipe is connected to the water inlet of the radiator through a coolant outlet pipe, the water outlet of the radiator is connected to the reflux port of the coolant circulation pipe through a coolant return pipe, and the liquid pump is arranged inside the engine near the outlet of the coolant circulation pipe;
[0007] It also includes a coolant filling pipe and an auxiliary water tank, wherein the auxiliary water tank is installed on the top of the radiator and the installation height of the auxiliary water tank is higher than the highest point of the coolant circulation pipe, the inlet of the coolant filling pipe is connected to the bottom of the auxiliary water tank, and the outlet of the coolant filling pipe is connected to the interior of the coolant circulation pipe.
[0008] Preferably, a degassing pipe is included, a vent hole is opened at the highest point of the coolant circulation pipe, the inlet of the degassing pipe is connected to the vent hole, the outlet of the degassing pipe is connected to the upper part of the auxiliary water tank, the outlet height of the degassing pipe is higher than the inlet height of the coolant filling pipe, the liquid level of the auxiliary water tank is lower than the outlet height of the degassing pipe and the liquid level of the auxiliary water tank is higher than the inlet height of the coolant filling pipe.
[0009] Preferably, the degassing pipe and the coolant filling pipe are both arranged on a side of the auxiliary water tank close to the engine, and a coolant observation window for observing the internal liquid level is provided on a side of the auxiliary water tank away from the engine.
[0010] Preferably, a sealing cover is installed at the upper end of the auxiliary water tank, and a gas pressure valve is installed at the upper end of the sealing cover.
[0011] Preferably, a liquid level sensor is installed at the bottom of the auxiliary water tank.
[0012] The beneficial effects of the present invention are:
[0013] (1) When the temperature inside the engine reaches a high temperature, the air released from the coolant is promptly discharged through the degassing pipe, which will not affect the heat dissipation of the engine;
[0014] (2) It has a separate coolant filling pipe, which allows for fast coolant filling and prevents the air and coolant from being injected into the engine at the same time;
[0015] (3) A coolant observation window is added to facilitate observation and timely understanding of the coolant status;
[0016] (4) After the engine has been running for a long time, the coolant is easily lost. By monitoring it with a liquid level sensor, timely detection can be made to prevent the engine from running at high temperature. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In the attached picture:
[0018] Figure 1 A top view of the internal combustion forklift cooling system proposed by the utility model;
[0019] Figure 2 A side view of the internal combustion forklift cooling system proposed by the utility model;
[0020] Figure 3This is a rear view of the internal combustion forklift cooling system proposed by the utility model;
[0021] Figure 4 A top view of the existing internal combustion forklift cooling system proposed by the utility model;
[0022] Figure 5 It is a side view of the existing internal combustion forklift cooling system proposed by the utility model.
[0023] In the figure: 1-engine, 2-intercooler intake pipe, 3-coolant return pipe, 4-radiator, 5-coolant outlet pipe, 6-intercooler outlet pipe, 7-degassing pipe, 8-coolant filling pipe, 9-liquid level sensor, 10-coolant observation window, 11-auxiliary water tank, 12-gas pressure valve. DETAILED DESCRIPTION
[0024] Reference Figure 4 and Figure 5 In the existing internal combustion forklift cooling system, a radiator 4 is included, a coolant circulation pipe arranged inside the engine 1 to dissipate heat for the engine 1, and a liquid pump pumping the coolant inside the coolant circulation pipe into the radiator 4. The outlet of the coolant circulation pipe is connected to the water inlet of the radiator 4 through the coolant outlet pipe 5, and the outlet of the radiator 4 is connected to the return port of the coolant circulation pipe through the coolant return pipe 3. The liquid pump is arranged inside the engine near the outlet of the coolant circulation pipe.
[0025] Reference Figure 1 , Figure 2 and Figure 3 :
[0026] In this embodiment, the internal combustion forklift cooling system also includes a coolant filling pipe 8 and an auxiliary water tank 11. The auxiliary water tank 11 is installed on the top of the radiator 4 and the installation height of the auxiliary water tank 11 is higher than the highest point of the coolant circulation pipe. The inlet of the coolant filling pipe 8 is connected to the bottom of the auxiliary water tank 11, and the outlet of the coolant filling pipe 8 is connected to the inside of the coolant circulation pipe.
[0027] Obviously, by setting the auxiliary water tank 11 and the coolant filling pipe 8, since the installation height of the auxiliary water tank 11 is higher than the highest point of the coolant circulation pipe, when the coolant in the coolant circulation pipe is lost, the coolant in the auxiliary water tank 11 flows into the coolant circulation pipeline through the coolant filling pipe 8 to replenish the coolant. At the same time, the coolant filling pipe 8 is injected with coolant separately, and is injected by immersion from the bottom of the coolant circulation pipe upward, which is not easy to cause bubbles to be generated, and the filling efficiency is higher.
[0028] In the present embodiment, a degassing pipe 7 is included, a vent hole is opened at the highest point of the coolant circulation pipe, the inlet of the degassing pipe 7 is connected to the vent hole, the outlet of the degassing pipe 7 is connected to the upper part of the auxiliary water tank 11, the outlet height of the degassing pipe 7 is higher than the inlet height of the coolant filling pipe 8, the liquid level height of the auxiliary water tank 11 is lower than the outlet height of the degassing pipe 7 and the liquid level height of the auxiliary water tank 11 is higher than the inlet height of the coolant filling pipe 8.
[0029] Obviously, at high temperatures, the air dissolved in the coolant precipitates. If it is not discharged in time, bubbles are easily formed during the coolant circulation cooling process, resulting in a smaller heat dissipation area in contact with the coolant, affecting the heat dissipation efficiency of the engine. By setting up the degassing pipe 7, the gas is discharged to prevent it from affecting the heat dissipation of the engine.
[0030] In this embodiment, the degassing pipe 7 and the coolant filling pipe 8 are both arranged on the side of the auxiliary water tank 11 close to the engine 1, and a coolant observation window 10 for observing the internal liquid level is provided on the side of the auxiliary water tank 11 away from the engine 1.
[0031] Obviously, the liquid level status in the auxiliary water tank 11 can be observed in real time through the coolant observation window 10, so that the staff can provide feedback in time, which is convenient for the staff to operate.
[0032] In this embodiment, a sealing cover is installed at the upper end of the auxiliary water tank 11, and a gas pressure valve 12 is installed at the upper end of the sealing cover.
[0033] Obviously, when the gas pressure in the auxiliary water tank 11 is greater than the preset pressure value, the gas pressure valve 12 opens, and after the gas is discharged, the pressure in the auxiliary water tank 11 returns to the preset pressure value range, and the gas pressure valve 12 closes.
[0034] In this embodiment, a liquid level sensor 9 is installed at the bottom of the auxiliary water tank 11 .
[0035] Obviously, by real-time monitoring through the liquid level sensor 9, if the liquid level in the auxiliary water tank 11 is lower than the preset liquid level, it can be discovered in time to avoid the lack of coolant, the reduction of heat dissipation effect, and the high temperature operation of the engine.
Claims
1. A cooling system for an internal combustion forklift, comprising a radiator (4), a coolant circulation pipe arranged inside an engine (1) for dissipating heat from the engine (1), and a liquid pump for pumping coolant in the coolant circulation pipe into the radiator (4), the outlet of the coolant circulation pipe being connected to a water inlet of the radiator (4) through a coolant outlet pipe (5), the outlet of the radiator (4) being connected to a reflux port of the coolant circulation pipe through a coolant return pipe (3), and the liquid pump being arranged inside the engine near the outlet of the coolant circulation pipe; Features: It also includes a coolant filling pipe (8) and an auxiliary water tank (11), wherein the auxiliary water tank (11) is installed on the top of the radiator (4) and the installation height of the auxiliary water tank (11) is higher than the highest point of the coolant circulation pipe, the inlet of the coolant filling pipe (8) is connected to the bottom of the auxiliary water tank (11), and the outlet of the coolant filling pipe (8) is connected to the inside of the coolant circulation pipe.
2. The internal combustion forklift cooling system according to claim 1, characterized in that: It comprises a degassing pipe (7), a vent hole is opened at the highest point of the coolant circulation pipe, the inlet of the degassing pipe (7) is connected to the vent hole, the outlet of the degassing pipe (7) is connected to the upper part of the auxiliary water tank (11), the outlet height of the degassing pipe (7) is higher than the inlet height of the coolant filling pipe (8), the liquid level of the auxiliary water tank (11) is lower than the outlet height of the degassing pipe (7) and the liquid level of the auxiliary water tank (11) is higher than the inlet height of the coolant filling pipe (8).
3. The internal combustion forklift cooling system according to claim 2, characterized in that: The degassing pipe (7) and the coolant filling pipe (8) are both arranged on a side of the auxiliary water tank (11) close to the engine (1), and a coolant observation window (10) for observing the internal liquid level is arranged on a side of the auxiliary water tank (11) away from the engine (1).
4. The internal combustion forklift cooling system according to claim 2, characterized in that: A sealing cover is installed at the upper end of the auxiliary water tank (11), and a gas pressure valve (12) is installed at the upper end of the sealing cover.
5. The internal combustion forklift cooling system according to claim 1, characterized in that: A liquid level sensor (9) is installed at the bottom of the auxiliary water tank (11).