Diesel oil pipeline heating device

Abstract

The utility model discloses a diesel oil pipeline heating device which comprises a heating sleeve, an anti-freezing solution box, an anti-freezing solution heating device and a circulating pump, the heating sleeve comprises a solution inlet C-shaped pipe and a solution return C-shaped pipe, the solution inlet C-shaped pipe and the solution return C-shaped pipe are spliced into an annular pipe to be arranged outside a diesel oil pipeline in a sleeved mode, and the solution inlet C-shaped pipe and the solution return C-shaped pipe are each of a hollow double-layer structure. A liquid inlet of the C-shaped liquid inlet pipe is communicated with a liquid outlet of the anti-freezing liquid tank, a liquid outlet of the C-shaped liquid return pipe is communicated with a liquid return opening of the anti-freezing liquid tank, a liquid outlet of the C-shaped liquid inlet pipe is communicated with a liquid inlet of the C-shaped liquid return pipe through a communicating pipe, anti-freezing liquid is arranged in the anti-freezing liquid tank, and the anti-freezing liquid heating device is used for heating the anti-freezing liquid in the anti-freezing liquid tank. And the circulating pump is used for conveying the heated anti-freezing solution in the anti-freezing solution tank into the solution inlet C-shaped pipe and returning the heated anti-freezing solution to the anti-freezing solution tank through the solution return C-shaped pipe. Direct contact between a heating source and the diesel oil pipeline is avoided, and potential safety hazards are eliminated by adopting a heating mode that a heating medium is in contact with the diesel oil pipeline.

Description

Technical Field

[0001] The utility model relates to the technical field of diesel power generation, and more specifically, the utility model relates to a diesel pipeline heating device. Background Art

[0002] In cold seasons, the diesel pipelines of diesel generator sets often encounter the problem that diesel solidifies at low temperatures, resulting in abnormal transportation. For example, the inlet and return oil pipes of a diesel generator set suck diesel through the oil pipes to supply the engine for combustion and external work. The freezing point of diesel is relatively high, and it will solidify and wax even in slightly cold weather, resulting in blockage of the diesel pipeline and the inability to supply diesel to the engine, causing the engine to fail to start and operate. Therefore, it is necessary to heat the diesel pipeline to prevent the diesel inside from freezing.

[0003] The existing method for heating diesel pipelines is to directly heat the oil pipes by closely attaching heating wires. However, if there is fuel leakage and the fuel comes into contact with the heating wires, there are potential safety hazards. Summary of the Utility Model

[0004] In view of the deficiencies of the prior art, the utility model innovatively provides a diesel pipeline heating device, which avoids direct contact between the heating source and the diesel pipeline, adopts a heating form in which the heating medium contacts the diesel pipeline, and eliminates potential safety hazards. It is more suitable for high-altitude, extremely cold, and unmanned areas, prevents the diesel in the diesel pipeline from freezing, and ensures the normal operation of the diesel generator set.

[0005] To achieve the above technical objectives, the utility model discloses a diesel pipeline heating device, which includes a heating sleeve, an antifreeze tank, an antifreeze heating device, and a circulation pump.

[0006] The heating sleeve includes an inlet liquid C-shaped pipe and a return liquid C-shaped pipe. The inlet liquid C-shaped pipe and the return liquid C-shaped pipe are spliced into an annular pipe and sleeved outside the diesel pipeline. Both the inlet liquid C-shaped pipe and the return liquid C-shaped pipe are double-layer structures with hollow interiors. The inlet of the inlet liquid C-shaped pipe is communicated with the outlet of the antifreeze tank, the outlet of the return liquid C-shaped pipe is communicated with the return port of the antifreeze tank, and the outlet of the inlet liquid C-shaped pipe and the inlet of the return liquid C-shaped pipe are communicated through a connecting pipe.

[0007] The antifreeze tank is filled with antifreeze. The antifreeze heating device is used to heat the antifreeze in the antifreeze tank, and the circulation pump is used to transport the heated antifreeze in the antifreeze tank into the inlet liquid C-shaped pipe and return it to the antifreeze tank through the return liquid C-shaped pipe.

[0008] Further, the inlet liquid C-shaped pipe and the return liquid C-shaped pipe are spliced through mutually matching grooves and protrusions. The side end faces of the inlet liquid C-shaped pipe and the return liquid C-shaped pipe are both provided with alternately arranged grooves and protrusions, and the grooves and protrusions on the two C-shaped pipes are mutually matching.

[0009] Further, the liquid inlet and the liquid outlet of the liquid inlet C-shaped pipe and the liquid return C-shaped pipe are respectively arranged on the C-shaped end faces at both ends. The connecting pipe is a double-layer tubular structure with a hollow interior. One end of the connecting pipe is fixedly connected to the end of the liquid inlet C-shaped pipe where the liquid outlet is located and the end of the liquid return C-shaped pipe where the liquid inlet is located respectively, and is communicated with the liquid inlet C-shaped pipe and the liquid return C-shaped pipe respectively. The other end of the connecting pipe is a closed end.

[0010] Further, the liquid inlet and the liquid outlet of the liquid inlet C-shaped pipe and the liquid return C-shaped pipe are respectively arranged on the C-shaped end faces at both ends. Both the liquid inlet C-shaped pipe and the liquid return C-shaped pipe are communicated with the antifreeze tank through pipe joints. The pipe joint is a double-layer structure with a hollow interior. The pipe joint includes a tubular part and a C-shaped part that are communicated. The end of the tubular part away from the C-shaped part is fixedly connected to the antifreeze tank and is communicated with the antifreeze tank. The end of the C-shaped part away from the tubular part is fixedly connected to the end of the C-shaped pipe and is communicated with the C-shaped pipe.

[0011] Further, both the liquid inlet C-shaped pipe and the liquid return C-shaped pipe are coated with flame-retardant heat-insulating cotton.

[0012] Further, a control mechanism is further included. The control mechanism includes a power supply, an air switch, a first contactor, a second contactor, a step-down rectifier, a water temperature switch, and a high-temperature indicator light.

[0013] The circulating pump is electrically connected to the power supply through the normally open contact of the first contactor, a thermal fuse, and the air switch in sequence.

[0014] The antifreeze heating device is electrically connected to the power supply through the normally open contact of the second contactor and a thermal fuse in sequence.

[0015] The input end of the step-down rectifier is electrically connected to the power supply. The positive DC output end of the step-down rectifier is electrically connected to one end of the control coil of the first contactor and one end of the control coil of the second contactor respectively after passing through the normally closed contact of the water temperature switch. The other end of the control coil of the first contactor and the other end of the control coil of the second contactor are electrically connected to the negative DC output end of the step-down rectifier; the positive DC output end of the step-down rectifier, the normally open contact of the water temperature switch, the high-temperature indicator light, and the negative DC output end of the step-down rectifier form a series circuit. The water temperature switch changes from normally closed to normally open when the temperature of the antifreeze rises to the temperature threshold.

[0016] Further, the control mechanism further includes a float water level switch and a low liquid level indicator light. The normally closed contact of the float water level switch is connected in series with the normally closed contact of the water temperature switch. The positive DC output terminal of the step-down rectifier, the normally open contact of the float water level switch, the low liquid level indicator light, and the negative DC output terminal of the step-down rectifier form a series circuit. The float water level switch changes from normally closed to normally open when the liquid level of the antifreeze drops to the liquid level threshold.

[0017] Further, the control mechanism further includes a working indicator light, and the working indicator light is connected in parallel with the control coils of the first contactor and the second contactor.

[0018] Further, the antifreeze heating device is a heating wire, and the heating wire is placed inside the antifreeze tank.

[0019] Further, a pressure relief cover is provided at the top of the antifreeze tank.

[0020] The beneficial effects of the present utility model are as follows:

[0021] The diesel pipeline heating device of the present utility model avoids the direct contact between the heating source and the diesel pipeline, adopts a heating form in which the heating medium contacts the diesel pipeline, and eliminates potential safety hazards. It is more suitable for high altitude, severe cold, and unattended areas, prevents the diesel in the diesel pipeline from freezing, and ensures the normal operation of the diesel generator set. Description of the Drawings

[0022] Figure 1 is a schematic structural diagram of the diesel pipeline heating device according to an embodiment of the present utility model.

[0023] Figure 2 is a schematic structural diagram of the heating sleeve according to an embodiment of the present utility model.

[0024] Figure 3 is an end view schematic diagram of the heating sleeve according to an embodiment of the present utility model.

[0025] Figure 4 is an exploded view of the heating sleeve according to an embodiment of the present utility model.

[0026] Figure 5 is a schematic structural diagram of the heating sleeve at the elbow according to an embodiment of the present utility model.

[0027] Figure 6 is a schematic structural diagram of the connecting pipe according to an embodiment of the present utility model.

[0028] Figure 7 is a schematic structural diagram of the pipe joint according to an embodiment of the present utility model.

[0029] Figure 8 is a circuit schematic diagram of the control mechanism according to an embodiment of the present utility model.

[0030] In the figure,

[0031] 1. Heating sleeve; 11. Liquid inlet C-shaped pipe; 12. Liquid return C-shaped pipe; 2. Antifreeze tank; 21. Pressure relief cap; 3. Antifreeze heating device; 4. Circulation pump; 5. Connecting pipe; 6. Pipe joint; 7. Flame-retardant heat insulation cotton; 8. Water temperature switch; 9. Float level switch; 10. Diesel pipeline; 20. High temperature indicator light; 30. Low liquid level indicator light; 40. Working indicator light. Specific implementation mode

[0032] The diesel pipeline heating device provided by the present utility model will be explained and described in detail below with reference to the accompanying drawings of the specification.

[0033] This embodiment specifically discloses a diesel pipeline heating device, as Figure 1 shown, which includes a heating sleeve 1, an antifreeze tank 2, an antifreeze heating device 3 and a circulation pump 4. As Figure 1-5 shown, the heating sleeve 1 includes a liquid inlet C-shaped pipe 11 and a liquid return C-shaped pipe 12. The liquid inlet C-shaped pipe 11 and the liquid return C-shaped pipe 12 are spliced into an annular pipe and sleeved outside the diesel pipeline 10. Both the liquid inlet C-shaped pipe 11 and the liquid return C-shaped pipe 12 are double-layer structures with a hollow interior. The hollow inner cavities of the liquid inlet C-shaped pipe 11 and the liquid return C-shaped pipe 12 serve as antifreeze flow cavities. The liquid inlet of the liquid inlet C-shaped pipe 11 is communicated with the liquid outlet of the antifreeze tank 2, and the liquid outlet of the liquid return C-shaped pipe 12 is communicated with the liquid return port of the antifreeze tank 2. The liquid outlet of the liquid inlet C-shaped pipe 11 and the liquid inlet of the liquid return C-shaped pipe 12 are communicated through a connecting pipe 5.

[0034] Optionally, the liquid inlets and outlets of the liquid inlet C-shaped pipe 11 and the liquid return C-shaped pipe 12 are respectively arranged on the C-shaped end faces at both ends, that is, both the liquid inlet C-shaped pipe 11 and the liquid return C-shaped pipe 12 are composed of two coaxially arranged C-shaped plates connected by a connecting plate on the side. Both ends of the C-shaped pipe are open, serving as the liquid inlet and outlet. As Figure 6 shown, the connecting pipe 5 is a double-layer tubular structure with a hollow interior. The hollow inner cavity of the connecting pipe 5 serves as an antifreeze flow cavity. One end of the connecting pipe 5 is fixedly connected to the end of the liquid inlet C-shaped pipe 11 with a liquid outlet and the end of the liquid return C-shaped pipe 12 with a liquid inlet respectively and is communicated with the liquid inlet C-shaped pipe 11 and the liquid return C-shaped pipe 12. The other end of the connecting pipe 5 is a closed end, and the end of the connecting pipe 5 connected to the liquid inlet C-shaped pipe 11 and the liquid return C-shaped pipe 12 is provided with an opening. Preferably, the liquid inlet C-shaped pipe 11, the liquid return C-shaped pipe 12 and the connecting pipe 5 are all made of PVC material, which is insulated and corrosion-resistant. The liquid outlet end of the liquid inlet C-shaped pipe 11 and the end of the connecting pipe 5 with an opening can be hot-melt connected, and the liquid inlet end of the liquid return C-shaped pipe 12 and the end of the connecting pipe 5 with an opening can be hot-melt connected. The connecting pipe 5 can also be sleeved on the diesel pipeline 10.

[0035] The size specifications of the annular tube formed by splicing the liquid inlet C-shaped tube 11 and the liquid return C-shaped tube 12 are set according to the size of the diesel pipeline 10 and bend with the bending of the diesel pipeline 10 (as Figure 5 shown).

[0036] As Figure 2-5 shown, the liquid inlet C-shaped tube 11 and the liquid return C-shaped tube 12 are spliced through mutually matching grooves and protrusions. Grooves and protrusions are arranged in a staggered manner on the side end faces of the liquid inlet C-shaped tube 11 and the liquid return C-shaped tube 12. The grooves and protrusions on the two C-shaped tubes are mutually matching. The positions of the protrusions on the liquid inlet C-shaped tube 11 correspond to the positions of the grooves on the liquid return C-shaped tube 12, and the positions of the grooves on the liquid inlet C-shaped tube 11 correspond to the positions of the protrusions on the liquid return C-shaped tube 12. The protrusions and grooves are snap-connected one by one to realize the snap connection of the liquid inlet C-shaped tube 11 and the liquid return C-shaped tube 12 and spliced into an annular sleeve.

[0037] In some embodiments, both the liquid inlet C-shaped tube 11 and the liquid return C-shaped tube 12 are communicated with the antifreeze tank 2 through the pipe joint 6, as Figure 1 and 7 shown. The pipe joint 6 is a double-layer structure with a hollow interior. The hollow inner cavity of the pipe joint 6 serves as the antifreeze flow cavity. The pipe joint 6 includes a connected tubular part and a C-shaped part. The end of the tubular part far from the C-shaped part is fixedly connected to the antifreeze tank 2 and communicated with the antifreeze tank 2. The end of the C-shaped part far from the tubular part is fixedly connected to the end of the C-shaped tube and communicated with the C-shaped tube. The end of the tubular part far from the C-shaped part is set to be open, so that the antifreeze in the antifreeze tank 2 enters the interior of the pipe joint 6. The part of the tubular part close to the C-shaped part but not communicated with the C-shaped part is closed, and the end of the C-shaped part far from the tubular part is open. The pipe joint 6 is also made of PVC material, and the C-shaped part is heat-melted and connected to the C-shaped tube. External threads are provided on the outer surface of the tubular part, which can be threadedly connected to the antifreeze tank 2. There may be a certain distance between the ends of the liquid inlet C-shaped tube 11 and the liquid return C-shaped tube 12 connected to the pipe joint 6 (that is, the liquid inlet end of the liquid inlet C-shaped tube 11 and the liquid outlet end of the liquid return C-shaped tube 12), and they can be bent slightly away from each other. As Figure 1 shown, one of the C-shaped tubes can be kept at a distance from the end of the other C-shaped tube by setting an elbow, which is convenient for connecting with the pipe joint 6 and convenient for the up-and-down or left-and-right arrangement of the two pipe joints 6.

[0038] In some embodiments, both the liquid inlet C-shaped tube 11 and the liquid return C-shaped tube 12 are coated with a flame-retardant heat-insulating cotton 7. The flame-retardant heat-insulating cotton 7 can be made of a material that resists rainwater corrosion and is more suitable for unattended extreme environments. The flame-retardant heat-insulating cotton 7 reduces the heat dissipation of the antifreeze in the heating sleeve 1 and has a better heating effect.

[0039] The antifreeze tank 2 is provided with antifreeze, and the antifreeze heating device 3 is used to heat the antifreeze in the antifreeze tank 2. In this embodiment, the antifreeze heating device 3 is an electric heating wire, and the electric heating wire is placed in the antifreeze tank 2. The circulation pump 4 is used to transport the heated antifreeze in the antifreeze tank 2 into the liquid inlet C-shaped pipe 11 and return it to the antifreeze tank 2 through the liquid return C-shaped pipe 12.

[0040] When the circulation pump 4 and the antifreeze heating device 3 are working, the antifreeze is heated and raised in temperature by the antifreeze heating device 3. The heated antifreeze is pumped by the circulation pump 4 and enters the liquid inlet C-shaped pipe 11 from the liquid outlet of the antifreeze tank 2, bringing heat to the diesel pipeline 10 and heating the diesel in the diesel pipeline 10. After heat exchange, the temperature of the antifreeze will decrease. The low-temperature antifreeze flows to the end of the liquid inlet C-shaped pipe 11 and then enters the connecting pipe 5. After passing through the connecting pipe 5, it enters the liquid return C-shaped pipe 12, and the liquid return C-shaped pipe 12 sends the low-temperature antifreeze back to the antifreeze tank 2. The temperature of the low-temperature antifreeze entering the liquid return C-shaped pipe 12 may still be higher than the temperature of the diesel pipeline 10 and the diesel inside it, and it can still play a heating role during the reflux process of the antifreeze. It realizes the isolated heating of the heating source and the diesel pipeline 10. The heating source does not directly contact the diesel pipeline 10, but transfers heat to the diesel pipeline 10 and the diesel in the diesel pipeline 10 through the heating medium, eliminating the safety hazard caused by diesel leakage.

[0041] In some embodiments, the diesel pipeline heating device of the present application further includes a control mechanism, such as Figure 8As shown in the figure, the control mechanism includes a power supply, an air switch, a first contactor KM1, a second contactor KM2, a step-down rectifier, a water temperature switch 8 and a high-temperature indicator light 20. In this embodiment, the power supply is three-phase alternating current, and the air switch is a three-pole air switch. The circulation pump 4 is electrically connected to the power supply through the normally open contact of the first contactor KM1, a thermal fuse FU and the air switch in sequence. The antifreeze heating device 3 is electrically connected to the power supply through the normally open contact of the second contactor KM2 and the thermal fuse FU in sequence. The thermal fuse functions as an insurance. The input end of the step-down rectifier is electrically connected to the power supply. The step-down rectifier includes a transformer and a rectifier. The transformer converts alternating current into 24V direct current. The positive DC output end of the step-down rectifier is electrically connected to one end of the control coil of the first contactor KM1 and one end of the control coil of the second contactor KM2 through the normally closed contact of the water temperature switch 8. The other end of the control coil of the first contactor KM1 and the other end of the control coil of the second contactor KM2 are electrically connected to the negative DC output end of the step-down rectifier, that is, the control coils of the first contactor KM1 and the second contactor KM2 are connected in parallel and then connected in series with the normally closed contact of the water temperature switch 8. The positive DC output end of the step-down rectifier, the normally open contact of the water temperature switch 8, the high-temperature indicator light 20 and the negative DC output end of the step-down rectifier form a series circuit. The water temperature switch 8 changes from normally closed to normally open when the temperature of the antifreeze rises to the temperature threshold. When the temperature of the antifreeze is below the temperature threshold, the normally closed contact of the water temperature switch 8 is in a closed state. Therefore, the temperature below the temperature threshold is the normal working temperature of the diesel pipeline heating device. At this time, the control coils of the first contactor KM1 and the second contactor KM2 are energized, the normally open contact of the first contactor KM1 closes, and the normally open contact of the second contactor KM2 also closes. The circulation pump 4 is energized to work, and the antifreeze heating device 3 is also energized to work to heat the diesel pipeline 10 and the diesel therein. When the temperature of the antifreeze is heated to the temperature threshold, the temperature threshold can be set according to actual needs. In this embodiment, the temperature threshold is the highest temperature to which the antifreeze is heated, that is, when the antifreeze reaches a high temperature, the normally open contact of the water temperature switch 8 closes, cutting off the operation of the antifreeze heating device 3 and cutting off the operation of the circulation pump 4. At the same time, the high-temperature indicator light 20 lights up to save energy. When the water temperature drops below the temperature threshold, the normally closed contact of the water temperature switch 8 closes, and the antifreeze heating device 3 and the circulation pump 4 continue to work.

[0042] The control mechanism further includes a working indicator light 40, and the working indicator light 40 is connected in parallel with the control coils of the first contactor KM1 and the second contactor KM2. When the diesel pipeline heating device is working normally, the working indicator light 40 lights up.

[0043] In some embodiments, the control mechanism further includes a float type water level switch 9 and a low liquid level indicator 30. The normally closed contact of the float type water level switch 9 is connected in series with the normally closed contact of the water temperature switch 8. The positive DC output terminal of the step-down rectifier, the normally open contact of the float type water level switch 9, the low liquid level indicator 30, and the negative DC output terminal of the step-down rectifier form a series circuit. The float type water level switch 9 changes from normally closed to normally open when the liquid level of the antifreeze drops to the liquid level threshold. The float type water level switch 9 is used to monitor the amount of antifreeze in the antifreeze tank. When the amount of antifreeze is insufficient, the circulation pump 4 and the antifreeze heating device 3 stop working for liquid replenishment. This liquid level threshold can be set according to actual needs. The float type water level switch 9 changes from normally closed to normally open when the liquid level of the antifreeze drops to the liquid level threshold, enabling liquid replenishment. When the liquid level of the antifreeze drops to the liquid level threshold, the circulation pump 4 and the antifreeze heating device 3 also stop working.

[0044] When the liquid level is higher than the liquid level threshold and the antifreeze temperature is lower than the temperature threshold, the normally closed contact of the float type water level switch 9 is in the closed state, and the normally closed contact of the water temperature switch 8 is also in the closed state. At this time, the control coils of the first contactor KM1, the second contactor KM2, and the working indicator light 40 are energized. The normally open contact of the first contactor KM1 closes, and the normally open contact of the second contactor KM2 also closes. The circulation pump 4 is energized to work, and the antifreeze heating device 3 is also energized to work. The working indicator light 40 is lit, and the diesel pipeline heating device works normally. When the water temperature reaches the temperature threshold, the normally open contact of the water temperature switch 8 changes from normally closed to normally open. The control coils of the first contactor KM1, the second contactor KM2, and the working indicator light 40 lose power. The circulation pump 4 and the antifreeze heating device 3 both stop working. The working indicator light 40 goes out. At the same time, the high temperature indicator light 20 is lit. When the water temperature drops below the temperature threshold, the normally closed contact of the water temperature switch 8 changes from normally open to normally closed, and the normally open contact of the water temperature switch 8 changes from normally closed to normally open. The diesel pipeline heating device works normally again. When the antifreeze is too little to reach the liquid level threshold, the normally closed contact of the float type water level switch 9 changes from normally closed to normally open. The control coils of the first contactor KM1, the second contactor KM2, and the working indicator light 40 lose power. The circulation pump 4 and the antifreeze heating device 3 both stop working. The working indicator light 40 goes out. At the same time, the normally open contact of the float type water level switch 9 changes from normally open to normally closed, and the low liquid level indicator 30 is lit. When antifreeze is added again, the float rises, triggering the normally closed contact of the float type water level switch 9. The normally closed contact of the float type water level switch 9 closes and the normally open contact opens. The diesel pipeline heating device works normally again.

[0045] A pressure relief cover 21 is provided at the top of the antifreeze tank 2. The pressure relief cover 21 is provided with a vent for pressure relief.

[0046] The high temperature indicator light 20, the low liquid level indicator 30, and the working indicator light 40 can be embedded on the outer wall of the antifreeze tank 2.

[0047] The diesel pipeline heating device of the present application is provided with a low liquid level protection function and stops working when the antifreeze is at a high temperature, which is energy-saving and environment-friendly. The diesel pipeline heating device of the present application can prevent the fuel pipelines of diesel generator sets in high altitude and severe cold areas from freezing and can work normally; it adopts a heating method in which the heat source has no direct contact with the diesel pipeline 10, eliminating potential safety hazards; the original electric heating wire heating method is continuous heating, consuming energy, while the present application is intelligent heating, saving energy.

[0048] The diesel pipeline heating device of the present application can be used in unattended areas with high altitude and severe cold (below minus 40 degrees Celsius). It can heat the diesel pipeline 10 in the diesel long-term power station and the diesel pipeline 10 from the oil depot to the power station, preventing the diesel inside the diesel pipeline 10 from freezing, thus preventing the situation where the engine cannot work due to the inability to supply fuel. Since it is unattended, the heating device cannot have potential safety hazards. The diesel pipeline heating device of the present application effectively overcomes this problem and eliminates potential safety hazards.

[0049] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0050] In the present utility model, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0051] In the description of this specification, the descriptions referring to terms such as "this embodiment", "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any at least one embodiment or example. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0052] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0053] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, and simple improvements made to the substantial content of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A diesel pipeline heating device, characterized in that, It includes a heating sleeve (1), an antifreeze tank (2), an antifreeze heating device (3) and a circulation pump (4). The heating sleeve (1) includes an inlet C-shaped pipe (11) and a return C-shaped pipe (12). The inlet C-shaped pipe (11) and the return C-shaped pipe (12) are spliced into an annular pipe and sleeved outside the diesel pipeline (10). Both the inlet C-shaped pipe (11) and the return C-shaped pipe (12) are double-layer structures with a hollow interior. The inlet of the inlet C-shaped pipe (11) is communicated with the outlet of the antifreeze tank (2), the outlet of the return C-shaped pipe (12) is communicated with the return port of the antifreeze tank (2), and the outlet of the inlet C-shaped pipe (11) and the inlet of the return C-shaped pipe (12) are communicated through a connecting pipe (5). The antifreeze tank (2) is filled with antifreeze. The antifreeze heating device (3) is used to heat the antifreeze in the antifreeze tank (2), and the circulation pump (4) is used to transport the heated antifreeze in the antifreeze tank (2) into the inlet C-shaped pipe (11) and return it to the antifreeze tank (2) through the return C-shaped pipe (12).

2. The diesel pipeline heating device according to claim 1, wherein The inlet C-shaped pipe (11) and the return C-shaped pipe (12) are spliced through mutually matching grooves and protrusions. The side end faces of the inlet C-shaped pipe (11) and the return C-shaped pipe (12) are both provided with grooves and protrusions arranged alternately, and the grooves and protrusions on the two C-shaped pipes are mutually matching.

3. The diesel pipeline heating device according to claim 1 or 2, characterized in that, The inlets and outlets of the inlet C-shaped pipe (11) and the return C-shaped pipe (12) are respectively arranged on the C-shaped end faces at both ends. The connecting pipe (5) is a double-layer tubular structure with a hollow interior. One end of the connecting pipe (5) is fixedly connected to the end of the inlet C-shaped pipe (11) where the outlet is located and the end of the return C-shaped pipe (12) where the inlet is located and is respectively communicated with the inlet C-shaped pipe (11) and the return C-shaped pipe (12), and the other end of the connecting pipe (5) is a closed end.

4. The diesel pipeline heating device according to claim 1 or 2, characterized in that The inlets and outlets of the inlet C-shaped pipe (11) and the return C-shaped pipe (12) are respectively arranged on the C-shaped end faces at both ends. The inlet C-shaped pipe (11) and the return C-shaped pipe (12) are both communicated with the antifreeze tank (2) through pipe joints (6). The pipe joints (6) are double-layer structures with a hollow interior. The pipe joints (6) include a tubular part and a C-shaped part that are communicated. The end of the tubular part away from the C-shaped part is fixedly connected to the antifreeze tank (2) and is communicated with the antifreeze tank (2), and the end of the C-shaped part away from the tubular part is fixedly connected to the end of the C-shaped pipe and is communicated with the C-shaped pipe.

5. The diesel pipeline heating device according to claim 1, wherein Both the inlet C-shaped pipe (11) and the return C-shaped pipe (12) are coated with flame-retardant heat-insulating cotton (7).

6. The diesel pipeline heating device according to claim 1, characterized in that, It also includes a control mechanism. The control mechanism includes a power supply, an air switch, a first contactor, a second contactor, a step-down rectifier, a water temperature switch (8) and a high-temperature indicator light (20). The circulation pump (4) is electrically connected to the power supply through the normally open contact of the first contactor, a thermal fuse and the air switch. The antifreeze heating device (3) is electrically connected to the power supply successively through the normally open contact of the second contactor and the thermal fuse. The input end of the step-down rectifier is electrically connected to the power supply. The positive DC output end of the step-down rectifier is electrically connected to one end of the control coil of the first contactor and one end of the control coil of the second contactor respectively after passing through the normally closed contact of the water temperature switch (8). The other end of the control coil of the first contactor and the other end of the control coil of the second contactor are electrically connected to the negative DC output end of the step-down rectifier. A series circuit is formed by the positive DC output end of the step-down rectifier, the normally open contact of the water temperature switch (8), the high-temperature indicator light (20), and the negative DC output end of the step-down rectifier. The water temperature switch (8) changes from normally closed to normally open when the temperature of the antifreeze rises to the temperature threshold.

7. The diesel pipeline heating device according to claim 6, characterized in that The control mechanism further includes a float type water level switch (9) and a low liquid level indicator light (30). The normally closed contact of the float type water level switch (9) is in series with the normally closed contact of the water temperature switch (8). A series circuit is formed by the positive DC output end of the step-down rectifier, the normally open contact of the float type water level switch (9), the low liquid level indicator light (30), and the negative DC output end of the step-down rectifier. The float type water level switch (9) changes from normally closed to normally open when the liquid level of the antifreeze drops to the liquid level threshold.

8. The diesel pipeline heating device according to claim 6 or 7, characterized in that, The control mechanism further includes a working indicator light (40), and the working indicator light (40) is in parallel with the control coils of the first contactor and the second contactor.

9. The diesel pipeline heating device according to claim 1, wherein, The antifreeze heating device (3) is a heating wire, and the heating wire is placed inside the antifreeze tank (2).

10. The diesel pipeline heating device according to claim 1, characterized in that, A pressure relief cover (21) is provided at the top of the antifreeze tank (2).

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