Low-temperature heating auxiliary system and control method thereof

Abstract

The invention provides a low-temperature heating auxiliary system and a control method.The low-temperature heating auxiliary system comprises a fuel tank, an engine heater, an engine, a first heating rod and a hydraulic oil tank, the engine heater comprises a first cavity and a second cavity which are arranged in a spaced mode, and low-temperature cooling liquid in the engine enters the first cavity; fuel oil in the fuel tank enters the second cavity to be combusted so as to heat the cooling liquid in the first cavity, and the heated cooling liquid flows back into the engine to be used for starting the engine; the first heating rod is arranged in the hydraulic oil tank, after the engine is started, at least part of high-temperature cooling liquid in the engine flows through the heating rod, and the heating rod heats oil in the hydraulic oil tank. The low-temperature heating auxiliary system can solve the problem that in the prior art, under the extremely cold condition, the engine rapidly completes idling to reach the working state, and the working efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering machinery, and in particular to a low-temperature heating auxiliary system and a control method thereof. Background Art

[0002] When the ambient temperature is lower than -20℃, the cold start of the engine will become increasingly difficult as the temperature decreases. When the engine is started under low temperature conditions, the intake temperature is low, which causes the temperature of the compressed air in the cylinder to be unfavorable for fuel combustion. The oil in the oil pan becomes more viscous due to the low temperature. Starting the engine under this condition will increase resistance. At the same time, the viscous oil is not conducive to the formation of oil film between the friction pairs. Forcing the engine to start will inevitably cause scratches between the friction surfaces, thereby reducing the life of the engine. At the same time, under low temperature conditions, the engine's cooling water temperature is low, the temperature of the entire engine body is low, and it takes a long time for the coolant in the cylinder to reach the ideal operating temperature after the engine is started. Direct starting will result in the engine failing to start or damaging the engine. Therefore, lower temperatures will increase friction and be unfavorable for fuel combustion, reducing starting performance.

[0003] Existing rotary drilling rigs heat the hydraulic oil through the heat generated by the hydraulic system itself. The main pump works at the maximum displacement state to achieve the heating of the hydraulic oil; or the cooling water is heated by electric heating, and the fuel system is heated by the cooling water. However, the heating efficiency of the above method is low, and the waiting time is long, which affects the construction efficiency. In addition, it is impossible to heat other parts such as the engine coolant, which is not practical in extremely cold areas. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a low-temperature heating auxiliary system, which can solve the problem in the prior art that the engine quickly completes idling and reaches the working state under extremely cold conditions, thereby improving working efficiency.

[0005] The present invention provides a low-temperature heating auxiliary system, comprising a fuel tank, an engine heater, an engine, a first heating rod and a hydraulic oil tank, wherein the engine heater comprises a first cavity and a second cavity arranged at intervals, the low-temperature coolant in the engine enters the first cavity, the fuel in the fuel tank enters the second cavity and burns to heat the coolant in the first cavity, and the heated coolant flows back into the engine for starting the engine; the first heating rod is arranged in the hydraulic oil tank, and when the engine is started, at least part of the high-temperature coolant in the engine flows through the heating rod, and the heating rod heats the oil in the hydraulic oil tank.

[0006] In one embodiment, the low-temperature heating auxiliary system includes an inlet pipe and an outlet pipe, wherein the inlet pipe and the outlet pipe are respectively connected between the engine and the engine heater, the inlet pipe is used to transport the low-temperature coolant in the engine to the engine heater, and the outlet pipe is used to transport the coolant heated by the engine heater to the engine.

[0007] In one embodiment, the engine is connected to the cab air conditioner via a first connecting pipe, the high-temperature coolant is cooled by the cab air conditioner, and the coolant after cooling flows back into the engine via a second connecting pipe.

[0008] In one embodiment, the low-temperature heating auxiliary system also includes a cab heater, which is connected to a fuel tank. The oil in the fuel tank enters the cab heater and then the high-temperature exhaust gas generated blows hot air to the cab through a cab air conditioner.

[0009] In one embodiment, the low-temperature heating auxiliary system also includes a battery and a battery heater. The battery heater is arranged above the battery. The battery heater is connected to the fuel tank. The high-temperature exhaust gas after the fuel in the fuel tank enters the battery heater and burns heats the battery.

[0010] In one embodiment, the low-temperature heating auxiliary system also includes a second heating rod, the battery is electrically connected to the second heating rod, the second heating rod is arranged in the fuel tank, and the battery supplies power to the second heating rod so that the second heating rod heats the fuel in the fuel tank.

[0011] In one embodiment, the low-temperature heating auxiliary system is further provided with a control system, and the control system is electrically connected to the low-temperature heating auxiliary system, and the control system is used to control the start and stop and logic control of the low-temperature heating auxiliary system.

[0012] In one embodiment, the low-temperature heating auxiliary system further includes a timer, and the timer is electrically connected to the control system, and the timer can enable the control system to turn on or off the low-temperature heating auxiliary system at a set time.

[0013] The present invention also relates to a control method for the above-mentioned low-temperature heating auxiliary system, the control method comprising:

[0014] The fuel in the fuel tank is respectively fed into the second cavity of the engine heater and the battery heater, and the low-temperature coolant in the engine is fed into the first cavity of the engine heater;

[0015] Driving the control system to control the low-temperature heating auxiliary system to start;

[0016] The combustion of fuel in the second cavity of the engine heater heats the low-temperature coolant in the first cavity, and the combustion of fuel in the battery heater causes the high-temperature exhaust gas to heat the battery;

[0017] The coolant in the second heater is heated and flows back into the engine, and the engine starts to start;

[0018] After the engine is started, part of the high-temperature coolant is used to heat the oil in the hydraulic oil tank through the first heating rod, and another part of the high-temperature coolant is used to heat the cab through the cab air conditioner.

[0019] In one embodiment, before driving the control system to control the low-temperature heating auxiliary system to start, the timer is set so that the timer drives the controller to turn on or off the low-temperature heating auxiliary system at the set time.

[0020] The low-temperature heating auxiliary system of the present invention allows the low-temperature coolant in the engine to flow into the first cavity, and the fuel in the fuel tank flows into the second cavity and burns to heat the coolant in the first cavity. The heated coolant flows back into the engine for engine starting. When the engine is started, at least part of the high-temperature coolant in the engine flows through the heating rod, and the heating rod heats the oil in the hydraulic oil tank. The coolant is heated by the combustion of the fuel, and the heating speed is fast. The high-temperature coolant generated after the engine is started heats the oil in the hydraulic oil tank through the first heating rod. The engine heater can quickly heat the engine coolant under extremely cold conditions, so that the engine can quickly complete idling and reach a working state, thereby improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 It is a schematic diagram of the control principle of the low-temperature heating auxiliary system of the present invention.

[0023] Explanation of the accompanying reference numerals: fuel tank -11; engine heater -12; engine -13; first heating rod -141; second heating rod -142; hydraulic oil tank -15; cab air conditioner -16; cab heater -17; battery heater -18; battery -19; first oil pump -211; second oil pump -212; third oil pump -213.

[0024] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0025] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the description of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] In the description of the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connection" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0027] The directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “front”, “back”, “top”, “bottom”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when used. They are only for the convenience of description and simplified description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0028] The terms "first", "second", "third" and the like are merely used to distinguish elements of similar nature, and do not indicate or imply relative importance or a particular order.

[0029] The terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of the elements listed and may also include additional elements not expressly listed.

[0030] like Figure 1As shown, the low-temperature heating auxiliary system of this embodiment is used when the rotary drilling rig is in a low-temperature environment. The low-temperature environment refers to below -20°C, including but not limited to -20°C, -41°C or -50°C, etc. The low-temperature heating auxiliary system includes a fuel tank 11, an engine heater 12, an engine 13, a first heating rod 141 and a hydraulic oil tank 15. The engine heater 12 includes a first cavity and a second cavity arranged at intervals. The low-temperature coolant in the engine 13 enters the first cavity, and the fuel in the fuel tank 11 enters the second cavity and burns to heat the coolant in the first cavity. The heated coolant flows back to the engine 13 for starting the engine 13, wherein the engine heater 12 The first oil pipe is connected to the fuel tank 11, and the first oil pipe is provided with a first oil pump 211, and the first oil pump 211 is used to pump the fuel in the fuel tank 11 into the second cavity of the engine heater 12; the first heating rod 141 is arranged in the hydraulic oil tank 15, and when the engine 13 is started, at least part of the high-temperature coolant in the engine 13 flows through the heating rod, and the heating rod heats the oil in the hydraulic oil tank 15; wherein, the heating rod is provided with a receiving cavity, and when the high-temperature coolant flows through the receiving cavity, the heating rod transfers the heat to the oil in the oil tank to heat it, and the contact area between the heating rod and the hydraulic oil tank 15 is large, so the temperature of the coolant can be quickly transferred to the oil in the hydraulic oil tank 15. The low-temperature heating auxiliary system is also provided with a control system, and the control system is electrically connected to the low-temperature heating auxiliary system, and the control system is used to control the start and stop and logic control of the low-temperature heating auxiliary system. The low-temperature heating auxiliary system also includes a timer, and the timer is electrically connected to the control system, and the timer can enable the control system to open or close the low-temperature heating auxiliary system at a set time.In this embodiment, the low-temperature heating auxiliary system also includes a temperature sensor, which is connected to the engine 13, and the temperature sensor is electrically connected to the control system. The temperature sensor is used to detect the ambient temperature; in a low-temperature environment, the coolant temperature in the cylinder of the engine 13 is low, and after the engine 13 is started, it takes a long time for the low-temperature coolant in the cylinder to reach an ideal operating temperature state (the ideal operating temperature state refers to 85°C to 95°C). In this case, directly starting the engine 13 will cause the engine 13 to fail to start or damage the engine 13. Therefore, it is necessary to heat the low-temperature coolant in the cylinder of the engine 13 in advance to reach a suitable temperature to reduce the damage to the engine 13. Damage, and the function of the engine heater 12 is to circulate and heat the low-temperature coolant from the cylinder body of the engine 13, the heating time is 25 minutes to 35 minutes, preferably 25 minutes, 30 minutes or 35 minutes, etc., the coolant heated to the ideal operating state returns to the cylinder body of the engine 13, at this time the engine 13 can be started directly, the low-temperature coolant is circulated and heated in advance by the engine heater 12, and the coolant is heated by fuel combustion, the whole low-temperature heating auxiliary system consumes less power, and the low-temperature heating auxiliary system can be started normally through the on-board battery 19, which is not only convenient to control and save energy, but also improves work efficiency.

[0031] The low-temperature heating auxiliary system of the present invention allows the low-temperature coolant in the engine 13 to flow into the first cavity, and the fuel in the fuel tank 11 flows into the second cavity and burns to heat the coolant in the first cavity. The heated coolant flows back to the engine 13 for starting the engine 13. When the engine 13 is started, at least part of the high-temperature coolant in the engine 13 flows through the heating rod, and the heating rod heats the oil in the hydraulic oil tank 15. The coolant is heated by the combustion of the fuel, and the heating speed is fast. The high-temperature coolant generated after the engine 13 is started heats the oil in the hydraulic oil tank 15 through the first heating rod 141. The engine heater 12 can quickly heat the engine 13 coolant under extremely cold conditions, so that the engine 13 can quickly complete idling and reach a working state, thereby improving work efficiency.

[0032] Preferably, the low-temperature heating auxiliary system includes an inlet pipe and an outlet pipe, which are respectively connected between the engine 13 and the engine heater 12. The inlet pipe is used to transport the low-temperature coolant in the engine 13 to the engine heater 12, and the outlet pipe is used to transport the coolant heated by the engine heater 12 to the engine 13. When the low-temperature heating auxiliary system is started, the coolant circulates between the engine 13, the inlet pipe, the engine heater 12 and the outlet pipe.

[0033] Preferably, the engine 13 is connected to the cab air conditioner 16 through a first connecting pipe, and the high-temperature coolant is dissipated through the cab air conditioner 16, and the coolant after dissipation flows back to the engine 13 through a second connecting pipe. Specifically, the high-temperature coolant flows through the cab air conditioner 16, and the cab air conditioner 16 blows hot air to the cab to take away the temperature of the high-temperature coolant, so that the temperature in the cab can quickly rise to an appropriate temperature.

[0034] Preferably, the low-temperature heating auxiliary system also includes a cab heater 17, which is connected to the fuel tank 11, and the oil in the fuel tank 11 enters the cab heater 17 and then the high-temperature exhaust gas generated blows hot air to the cab through the cab air conditioner 16, which can quickly heat the cab so that the cab reaches a suitable temperature, wherein the cab heater 17 is connected to the fuel tank 11 through a second oil pipe, and a second oil pump 212 is provided on the second oil pipe, and the second oil pump 212 is used to pump the fuel in the fuel tank 11 into the cab heater 17; the low-temperature heating auxiliary system also includes a battery 19 and a battery heater 18, the battery heater 18 is arranged above the battery 19, the battery heater 18 is connected to the fuel tank 11, the fuel in the fuel tank 11 enters the battery heater 18, and the high-temperature exhaust gas after combustion heats the battery 19, wherein the battery heater 18 is connected to the fuel tank 11 through a third oil pipe, and a third oil pump 213 is provided on the third oil pipe, and the third oil pump 213 is used to pump the fuel in the fuel tank 11 into the battery heater 18. Among them, the engine heater 12, the cab heater 17 and the battery heater 18 are all powered by burning fuel, and have a fast heating speed. The non-electric heating method can prevent the low temperature from having a great impact on the performance of the battery 19. The effect of low-temperature electric heating is not obvious. After the battery 19 is heated by the battery heater 18, the low-voltage electricity of the battery 19 is used to heat the precision filter of the engine 13 and the fuel tank 11, so that the fuel can be quickly heated to an appropriate temperature.

[0035] Preferably, the low-temperature heating auxiliary system also includes a second heating rod 142, the battery 19 is electrically connected to the second heating rod 142, the second heating rod 142 is arranged in the fuel tank 11, and the battery 19 supplies power to the second heating rod 142 so that the second heating rod 142 heats the fuel in the fuel tank 11.

[0036] The low-temperature heating auxiliary system of this embodiment is used in extremely cold areas. It heats the engine heater 12, the cab heater 17 and the battery heater 18 simultaneously through the combustion of fuel, so that the five major parts of the battery 19, coolant, fuel, hydraulic oil and cab are heated at the same time. The heating speed is fast, so that the rotary drilling rig can quickly meet the construction requirements, greatly improving the efficiency.

[0037] The present invention also relates to a control method for the above-mentioned low-temperature heating auxiliary system, the control method comprising:

[0038] The fuel in the fuel tank 11 enters the second cavity of the engine heater 12 and the battery heater 18 respectively, and the low-temperature coolant in the engine 13 enters the first cavity of the engine heater 12;

[0039] The control system is driven to control the start-up of the low-temperature heating auxiliary system; wherein, the low-temperature heating auxiliary system with a timer can first set the time of the timer before the control system is driven to control the start-up of the low-temperature heating auxiliary system, so that the timer drives the controller to turn on or off the low-temperature heating auxiliary system at the set time; for example, if the time when the rotary drilling rig needs to be used to implement the working conditions is 9 o'clock, then the start time of the timer can be set to 8:30, and at 8:30 the timer sends a signal to the control system, and the control system controls the start-up of the low-temperature heating auxiliary system to heat the five major parts of the rotary drilling rig in advance.

[0040] The combustion of fuel in the second cavity of the engine heater 12 heats the low-temperature coolant in the first cavity, and the combustion of fuel in the battery heater 18 causes the high-temperature exhaust gas to heat the battery 19;

[0041] The coolant in the second heater is heated and flows back into the engine 13, and the engine 13 starts to start;

[0042] After the engine 13 is started, a portion of the high-temperature coolant heats the oil in the hydraulic oil tank 15 through the first heating rod 141 , and another portion of the high-temperature coolant heats the cab through the cab air conditioner 16 .

[0043] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A low temperature heating auxiliary system, characterized in that: The invention comprises a fuel tank (11), an engine heater (12), an engine (13), a first heating rod (141) and a hydraulic oil tank (15); the engine heater (12) comprises a first cavity and a second cavity which are arranged at intervals; low-temperature coolant in the engine (13) enters the first cavity; fuel in the fuel tank (11) enters the second cavity and burns to heat the coolant in the first cavity; the heated coolant flows back into the engine (13) for starting the engine (13); the first heating rod (141) is arranged in the hydraulic oil tank (15); when the engine (13) is started, at least part of the high-temperature coolant in the engine (13) flows through the heating rod, and the heating rod heats the oil in the hydraulic oil tank (15).

2. The low temperature heating auxiliary system according to claim 1, characterized in that: The low-temperature heating auxiliary system comprises a liquid inlet pipe and a liquid outlet pipe, wherein the liquid inlet pipe and the liquid outlet pipe are respectively connected between the engine (13) and the engine heater (12), the liquid inlet pipe is used to transport the low-temperature coolant in the engine (13) to the engine heater (12), and the liquid outlet pipe is used to transport the coolant heated by the engine heater (12) to the engine (13).

3. The low temperature heating auxiliary system according to claim 1, characterized in that: The engine (13) is connected to the cab air conditioner (16) via a first connecting pipe, the high-temperature coolant passes through the cab air conditioner (16) to dissipate heat, and the coolant after dissipation flows back into the engine (13) via a second connecting pipe.

4. The low temperature heating auxiliary system according to claim 3, characterized in that: The low-temperature heating auxiliary system also includes a cab heater (17), the cab heater (17) being connected to the fuel tank (11), the oil in the fuel tank (11) entering the cab heater (17), and the high-temperature exhaust gas generated thereafter blowing hot air to the cab through the cab air conditioner (16).

5. The low temperature heating auxiliary system according to claim 1, characterized in that: The low-temperature heating auxiliary system also includes a battery (19) and a battery heater (18). The battery heater (18) is arranged above the battery (19). The battery heater (18) is connected to the fuel tank (11). The fuel in the fuel tank (11) enters the battery heater (18) and the high-temperature exhaust gas after combustion heats the battery (19).

6. The low temperature heating auxiliary system according to claim 5, characterized in that: The low-temperature heating auxiliary system also includes a second heating rod (142), the battery (19) is electrically connected to the second heating rod (142), the second heating rod (142) is arranged in the fuel tank (11), and the battery (19) supplies power to the second heating rod (142) so that the second heating rod (142) heats the fuel in the fuel tank (11).

7. The low temperature heating auxiliary system according to any one of claims 1 to 6, characterized in that: The low-temperature heating auxiliary system is also provided with a control system, which is electrically connected to the low-temperature heating auxiliary system and is used to control the start and stop and logic control of the low-temperature heating auxiliary system.

8. The low temperature heating auxiliary system according to claim 7, characterized in that: The low-temperature heating auxiliary system further includes a timer, which is electrically connected to the control system. The timer can enable the control system to turn on or off the low-temperature heating auxiliary system at a set time.

9. A control method for the low temperature heating auxiliary system according to any one of claims 1 to 9, characterized in that: The control method comprises: The fuel in the fuel tank (11) enters the second cavity of the engine heater (12) and the battery heater (18) respectively, and the low-temperature coolant in the engine (13) enters the first cavity of the engine heater (12); Driving the control system to control the low-temperature heating auxiliary system to start; The combustion of fuel in the second cavity of the engine heater (12) heats the low-temperature coolant in the first cavity, and the combustion of fuel in the battery heater (18) causes the high-temperature exhaust gas to heat the battery (19); The coolant in the second heater is heated and flows back into the engine (13), and the engine (13) starts to start; After the engine (13) is started, part of the high-temperature coolant heats the oil in the hydraulic oil tank (15) through the first heating rod (141), and another part of the high-temperature coolant heats the cab through the cab air conditioner (16).

10. The control method for a low temperature heating auxiliary system according to claim 9, characterized in that: Before driving the control system to control the low-temperature heating auxiliary system to start, the timer is set so that the timer drives the controller to turn on or off the low-temperature heating auxiliary system at the set time.

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