Liquid lubricating oil heating device

Abstract

The utility model relates to the field of lubricating oil preheating, in particular to a liquid lubricating oil heating device which comprises a box body, a heating coil and a control device, the box body is provided with a heating cavity, an oil inlet pipe section and an oil outlet pipe section, and the oil inlet pipe section and the oil outlet pipe section are respectively communicated with the heating cavity; the heating coil is located in the heating cavity and provided with an air inlet pipe section and an exhaust pipe section, and the air inlet pipe section and the exhaust pipe section penetrate through the box body. The control device comprises a temperature measuring unit and a control unit, the control unit is connected with the air inlet pipe section, the temperature measuring unit is connected with the oil inlet pipe section, and the temperature measuring unit is in communication connection with the control unit; the lubricating oil can be rapidly heated by the heating coil; the control device can adjust the flow of steam entering the heating coil, so that the heating efficiency of the heating coil is changed, and it is guaranteed that lubricating oil can be fully heated at different initial temperatures. Normal use of rear-end equipment is guaranteed, and safe and stable operation of a purification air pipe network is facilitated.

Description

Technical Field

[0001] The utility model relates to the field of lubricating oil preheating, in particular to a liquid lubricating oil heating device. Background Art

[0002] At present, the lubricating oil needs to be preheated when the purified air booster of the air separation and air compression station is started to improve the fluidity of the lubricating oil and make the equipment better lubricated. Currently, the lubricating oil is preheated by setting an electric heater at the bottom of the inner wall of the oil tank, and the lubricating oil in the oil tank is heated by the electric heater.

[0003] However, since the electric heater is set at the bottom of the box, the flow of lubricating oil is greatly limited, the contact space with the lubricating oil is limited, and the heat conduction efficiency is low, resulting in low heating efficiency of the lubricating oil, especially in winter. The low ambient temperature leads to a low initial temperature of the lubricating oil, and the heat is lost quickly during the heat transfer process, resulting in a long heating time of the lubricating oil. For some equipment that needs to be started quickly, too long preheating time will bring inconvenience and hidden dangers to the normal use of the purified air accident tank at the rear end of the booster, which is not conducive to the safe and stable operation of the purified air duct network in the factory. Utility Model Content

[0004] The utility model aims to overcome the shortcoming of the prior art that the lubricating oil of the purified air booster is slowly preheated, and provides a liquid lubricating oil heating device.

[0005] The utility model provides a liquid lubricating oil heating device, comprising

[0006] A box body, wherein the box body is provided with a heating chamber, an oil inlet pipe section and an oil outlet pipe section, wherein the oil inlet pipe section and the oil outlet pipe section are respectively connected to the heating chamber;

[0007] A heating coil, the heating coil is located in the heating chamber, the heating coil is provided with an air intake pipe section and an air exhaust pipe section, the air intake pipe section and the air exhaust pipe section respectively penetrate the box body;

[0008] The control device comprises a temperature measuring unit and a control unit, wherein the control unit is connected to the air intake pipe section, the temperature measuring unit is connected to the oil intake pipe section, and the temperature measuring unit is communicatively connected to the control unit.

[0009] The utility model discloses a liquid lubricating oil heating device, wherein the heating chamber provides a larger heating space for the lubricating oil, the lubricating oil enters the heating chamber from the oil inlet pipe on the top side of the box body, and the lubricating oil exchanges heat with the heating coil when it falls on and contacts the heating coil, thereby heating the lubricating oil; steam enters the heating coil from the air inlet pipe section and is discharged from the exhaust pipe section, and the heating coil can continuously exchange heat with the lubricating oil as the steam flows; the temperature measuring unit detects the initial temperature of the lubricating oil, so that the control unit can adjust the steam flow entering the coil according to the initial temperature, so that the heating efficiency of the heating coil can be adjusted, thereby reducing the influence of the initial temperature change of the lubricating oil on the heating effect of the lubricating oil; the utility model discloses a liquid lubricating oil heating device, which can quickly heat the lubricating oil and can adjust the heating efficiency according to the initial temperature of the lubricating oil, so that the lubricating oil can be quickly heated to a specified temperature.

[0010] Preferably, the heating chamber is provided with a dispersion device, the dispersion device is connected to the box body, the dispersion device is communicated with the oil inlet pipe section, the dispersion device is located on the top side of the heating coil, and the oil outlet pipe is communicated with the heating chamber located on the bottom side of the heating coil. The dispersion device can evenly sprinkle the lubricating oil onto the heating coil below, increasing the contact area between the lubricating oil and the heating coil, so that the lubricating oil can be quickly heated by the heating coil and discharged from the oil outlet pipe section under the action of gravity.

[0011] Preferably, the dispersion device comprises a dispersion pipe section and a plurality of spray heads, one end of the dispersion pipe section is closed and the other end is connected to the oil inlet pipe section, the dispersion pipe section is connected to the box body, and a plurality of spray heads are arranged on the side wall of the dispersion pipe section, and the spray heads are connected to the dispersion pipe section. The spray heads can disperse the lubricating oil more evenly, so that the lubricating oil can be heated quickly.

[0012] Preferably, the heating coil comprises a first joint, a second joint and a plurality of heating pipe sections arranged at intervals, the first joint and the second joint are respectively connected to the two ends of the heating pipe section, a plurality of the heating pipe sections are connected to the first joint, a plurality of the heating pipe sections are connected to the second joint, the first joint is connected to the intake pipe section, and the second joint is connected to the exhaust pipe section. The contact area between the heating coil and the lubricating oil is increased by the plurality of heating pipe sections, so that the lubricating oil can be heated quickly; the steam is dispersed by the plurality of heating pipe sections, so that the lubricating oil can be heated more evenly.

[0013] Preferably, the heating coil further comprises fins, the heating pipe section passes through the fins, and a plurality of the fins are arranged at intervals on the heating pipe section. By arranging the fins on the heating pipe section, the fins increase the contact area between the heating pipe section and the lubricating oil, and when the lubricating oil contacts the fins, the fins can be heated; the heating efficiency of the lubricating oil is improved, and the fins are arranged at a certain inclination angle to have a larger contact area, so that the lubricating oil can fully contact the fins when the lubricating oil falls.

[0014] Preferably, the air intake pipe section and the exhaust pipe section are detachably connected to the heating coil, the air intake pipe section is provided with a first valve, and the exhaust pipe section is provided with a second valve. When the heating coil needs to be maintained, the heating coil is isolated by closing the first valve and the second valve; and the liquid lubricating oil heating device can be quickly maintained by replacing the heating coil.

[0015] Preferably, it further comprises a bypass pipeline, one end of which is connected to the oil inlet pipe section and the other end is connected to the oil outlet pipe section. The bypass pipeline is provided with a bypass valve, and along the flow direction of the lubricating oil, the bypass pipeline is located at the downstream side of the temperature measuring unit; the oil outlet pipe section is provided with a one-way valve, and the one-way valve is located between the box body and the bypass pipeline. When the lubricating oil temperature of the oil inlet pipe section has reached the use temperature, the bypass valve on the bypass pipeline can be opened to connect the oil inlet pipe section with the oil outlet pipe section, so that the lubricating oil is discharged through the bypass pipeline; the one-way valve can prevent the lubricating oil from flowing back into the heating chamber.

[0016] Preferably, the box is provided with a temperature monitoring device for monitoring the temperature of the lubricating oil, the box is provided with a measuring hole, and the temperature measuring probe of the temperature monitoring device extends from the measuring hole into the heating chamber. The temperature monitoring device can monitor the temperature of the lubricating oil in the heating chamber to ensure that the lubricating oil is fully heated.

[0017] Preferably, the box body is provided with a sewage outlet connected to the heating chamber, and the sewage outlet is provided with a sewage valve. When performing maintenance on the heating chamber, the accumulated dirt in the heating chamber can be discharged through the sewage outlet.

[0018] Preferably, the oil inlet pipe section is provided with a third valve, and the oil outlet pipe section is provided with a fourth valve. By closing the third valve and the fourth valve, the box can be isolated, which is convenient for operators to maintain the box.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] 1. The utility model discloses a liquid lubricating oil heating device, wherein the heating chamber provides a large heating space for the lubricating oil, and the lubricating oil enters the heating chamber from the oil inlet pipe on the top side of the box body, and the lubricating oil exchanges heat with the heating coil when it falls on the heating coil, thereby heating the lubricating oil; steam enters the heating coil from the air inlet pipe section and is discharged from the exhaust pipe section, and the heating coil can continuously exchange heat with the lubricating oil as the steam flows; the temperature measuring unit detects the initial temperature of the lubricating oil, so that the control unit can adjust the steam flow entering the coil according to the initial temperature, so that the heating efficiency of the heating coil can be adjusted, thereby reducing the influence of the initial temperature change of the lubricating oil on the heating effect of the lubricating oil; the utility model discloses a liquid lubricating oil heating device, which can quickly heat the lubricating oil, and can adjust the heating efficiency according to the initial temperature of the lubricating oil, so that the lubricating oil can be quickly heated to a specified temperature;

[0021] 2. The utility model provides a liquid lubricating oil heating device with a simple structure, easy manufacturing and convenient use. After the lubricating oil enters the heating chamber, it can be quickly heated by the heating coil; the steam flow entering the heating coil is adjusted by the control device, thereby overcoming the initial temperature change of the lubricating oil caused by seasonal changes, so that the lubricating oil passing through the heating chamber can always be fully heated; the normal use of the purified air accident spherical tank at the rear end is guaranteed, which is beneficial to the safe and stable operation of the purified air duct network in the factory area, and has good economic value and practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic structural diagram of a liquid lubricating oil heating device according to Example 1;

[0023] Figure 2 It is a partial cross-sectional structural schematic diagram of a liquid lubricating oil heating device of Example 1;

[0024] Figure 3 It is a schematic structural diagram of the heating coil of Example 1;

[0025] Figure 4 It is a schematic diagram of the structure of the dispersion device of Example 1;

[0026] Figure 5 is a schematic structural diagram of a liquid lubricating oil heating device in one or more embodiments;

[0027] Figure 6 This is a schematic structural diagram of a liquid lubricating oil heating device in Example 2.

[0028] Markings in the figure:

[0029] 1-Box,

[0030] 11-heating chamber, 12-oil inlet pipe section, 13-oil outlet pipe section, 14-third valve, 15-fourth valve,

[0031] 2- Heating coil,

[0032] 21-intake pipe section, 22-exhaust pipe section, 23-first connector, 24-second connector, 25-heating pipe section, 26-fin, 27-first valve, 28-second valve,

[0033] 31-temperature measuring unit, 32-control unit,

[0034] 4- Dispersion device,

[0035] 41-dispersion pipe section, 42-sprinkler head,

[0036] 5-Bypass line,

[0037] 51-Bypass valve,

[0038] 6-Drain valve,

[0039] 7- Temperature monitoring device. DETAILED DESCRIPTION

[0040] The present invention is further described in detail below in conjunction with specific embodiments. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0041] Unless otherwise specified, in the description of the specific embodiments of the present utility model, the expression terms indicating the orientation or position relationship such as "upper", "lower", "left", "right", "center", "inside", "outside", etc. are all based on the expression of the orientation or position relationship shown in the drawings, or the orientation or position relationship when the product / equipment / device of the utility model is usually used. These terms of orientation or position relationship are only for the convenience of describing the scheme of the utility model or simplifying the description in the specific embodiments, so that technicians can quickly understand the scheme, rather than indicating or implying that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific position relationship, and therefore cannot be understood as a limitation on the present utility model.

[0042] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simplified to mean that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding devices / components / elements are within the error / deviation range, they can still achieve their functions in the solution of the utility model.

[0043] In addition, the expressions “first”, “second”, “third”, etc., which appear in the terms, are merely used to distinguish the description of the same or similar components and should not be understood as emphasizing or implying the relative importance of specific components.

[0044] In addition, in the description of the embodiments of the present invention, "several", "multiple" and "a number" represent at least 2. It can be any number such as 2, 3, 4, 5, 6, 7, 8, 9, and even more than 9.

[0045] In addition, in the description of the technical solution of the utility model, unless otherwise clearly specified / defined / restricted, the terms "set", "install", "connect", "connected", "provided with", "laid", and "arranged" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be welding, riveting, bolting, threading, and other commonly used connection means in the field. This connection can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal communication of two components.

[0046] Example 1

[0047] like Figure 1-Figure 5 As shown, a liquid lubricating oil heating device comprises a housing 1, a heating coil 2 and a control device;

[0048] The box body 1 is provided with a heating chamber 11, which is a closed space. A maintenance port is opened on the side wall of the box body 1 and a cover plate is provided on the maintenance port. The heating coil can be maintained through the maintenance port. An oil inlet pipe section 12 and an oil outlet pipe section 13 are provided on the side wall of the box body 1, so that the oil inlet pipe section 12 is located on the top side of the box body 1 and the oil outlet pipe section 13 is located on the bottom side of the box body 1. The oil inlet pipe section 12 and the oil outlet pipe section 13 are both connected to the heating chamber 11, so that the lubricating oil entering the heating chamber 11 from the oil inlet pipe section 12 falls under the action of gravity, ensuring that the lubricating oil contacts the heating coil 2; the oil outlet pipe section 13 is located on the bottom side of the box body 1, which is convenient for the lubricating oil to be discharged from the heating box body 1.

[0049] The heating coil 2 is arranged in the heating chamber 11 and is located at the bottom side of the heating chamber 11. The heating coil 2 is provided with an air inlet pipe section 21 and an air outlet pipe section 22. Steam flows in the heating coil 2 through the air inlet pipe section 21 and the air outlet pipe section, so that the heating coil 2 can be continuously heated and the lubricating oil in the heating chamber 11 can be fully heated.

[0050] The control device is composed of a temperature measuring unit 31 and a control unit 32. The control unit 32 is connected to the air intake pipe so that the control unit 32 can control the steam flow entering the heating coil 2, thereby controlling the heating efficiency of the heating coil 2 for the lubricating oil; the temperature measuring unit 31 is connected to the oil inlet pipe section 12 so that the temperature measuring unit 31 can measure the initial temperature of the lubricating oil in the oil inlet pipe section 12, so that the control unit 32 can adjust the steam flow according to the initial temperature to ensure that the lubricating oil discharged from the oil outlet pipe is fully heated to a suitable temperature.

[0051] The heating chamber 11 provides a larger heating space for the lubricating oil. The lubricating oil enters the heating chamber 11 from the oil inlet pipe on the top side of the housing 1. When the lubricating oil falls on and contacts the heating coil 2, it exchanges heat with the heating coil 2, thereby heating the lubricating oil. Steam enters the heating coil 2 from the air inlet pipe section 21 and is discharged from the exhaust pipe section 22. As the steam flows, the heating coil 2 can continue to exchange heat with the lubricating oil. The temperature measuring unit 31 detects the initial temperature of the lubricating oil, so that the control unit 32 can adjust the steam flow entering the coil according to the initial temperature, so that the heating efficiency of the heating coil 2 can be adjusted, thereby reducing the influence of the initial temperature change of the lubricating oil on the heating effect of the lubricating oil. The utility model provides a liquid lubricating oil heating device, which can quickly heat the lubricating oil and adjust the heating efficiency according to the initial temperature of the lubricating oil, so that the lubricating oil can be quickly heated to a specified temperature.

[0052] In one or several embodiments, a dispersion device 4 is provided in the heating chamber 11. The dispersion device 4 is located at the top of the heating chamber 11 and is connected and fixed to the top of the box body 1, so that the dispersion device 4 is located on the top side of the heating coil 2. The oil outlet pipe is connected to the heating chamber 11 located on the bottom side of the heating coil 2. The dispersion device 4 is connected to the oil inlet pipe section 12. The lubricating oil entering the heating chamber 11 first enters the dispersion device 4. The lubricating oil passing through the dispersion device 4 is evenly dispersed into droplets by the dispersion device 4. Under the action of gravity, the lubricating oil falls to contact the heating coil 2, so that the lubricating oil can be quickly heated.

[0053] In an optional embodiment, the dispersion device 4 is composed of a dispersion pipe section 41 and a plurality of spray heads 42. The plurality of spray heads 42 are arranged at intervals on the side wall of the dispersion pipe section 41, and the spray heads 42 spray vertically downward so that the lubricating oil droplets can fully contact the heating coil 2; one end of the dispersion pipe section 41 is closed and the other end is connected to the oil inlet pipe section 12; the dispersion pipe section 41 is connected and fixed to the box body 1.

[0054] In one or several embodiments, the heating coil 2 includes a first joint member 23, a second joint member 24 and several heating pipe segments 25 arranged at intervals, the first joint member 23 and the second joint member 24 are respectively connected to the two ends of the heating pipe segment 25, several heating pipe segments 25 are connected to the first joint member 23, and several heating pipe segments 25 are connected to the second joint member 24, the first joint member 23 is connected to the intake pipe segment 21, and the second joint member 24 is connected to the exhaust pipe segment 22; the heating pipe segments 25 arranged at intervals increase the heating area, so that the steam entering from the intake pipe is diverted to several heating pipe segments 25 at the first joint member 23, and the steam is gathered by the second joint member 24 after flowing through the heating pipe segment 25 and discharged from the exhaust pipe segment 22, so that the heating coil 2 can heat the lubricating oil more evenly; the first joint member 23 is detachably connected to the intake pipe segment 21, and the second joint member 24 is detachably connected to the exhaust pipe segment 22.

[0055] In an optional embodiment, the heating coil 2 also includes fins 26, a number of the heating pipe segments 25 pass through the fins 26, a number of fins 26 are arranged axially along the heating pipe, adjacent fins 26 are spaced apart, and the fins 26 are fixedly connected to the heating pipe segments 25; the fins 26 increase the contact area between the lubricating oil and the heating coil 2, so that the lubricating oil can be quickly heated.

[0056] In one or several embodiments, the air inlet pipe section 21 and the exhaust pipe section 22 are respectively detachably connected to the heating coil 2, the air inlet pipe section 21 is provided with a first valve 27, and the exhaust pipe section 22 is provided with a second valve 28; when the heating coil 2 needs to be maintained or replaced, the steam can be isolated by closing the first valve 27 and the second valve 28, so that the heating coil 2 can be maintained or replaced conveniently; the first valve 27 and the second valve 28 are both shut-off valves.

[0057] In one or more embodiments, the liquid lubricating oil heating device also includes a bypass line 5, one end of the bypass line 5 is connected to the oil inlet pipe section 12, and the other end is connected to the oil outlet pipe section 13. The bypass line 5 is provided with a bypass valve 51. Along the flow direction of the lubricating oil, the bypass line 5 is located on the downstream side of the temperature measuring unit 31; the bypass valve 51 is a one-way valve, which can prevent the lubricating oil from flowing back; through the bypass line 5, when there is no need to heat the lubricating oil, the lubricating oil can be directly discharged into the downstream pipeline through the bypass line 5.

[0058] In an optional embodiment, a one-way valve 16 is provided in the oil outlet pipe section 13 , and the one-way valve 16 is located between the box body 1 and the bypass line 5 , and the one-way valve 16 prevents the lubricating oil from flowing back into the heating chamber.

[0059] In an optional embodiment, the bypass valve 51 is a temperature-controlled valve, and the bypass valve 51 is automatically controlled by collecting the temperature of the oil inlet pipe section 12. When the temperature of the oil inlet pipe section 12 reaches a specified temperature, the bypass valve 51 can open to accelerate the discharge of lubricating oil into the oil outlet pipe section 13.

[0060] In one or several embodiments, a third valve 14 is provided at the oil inlet pipe section 12, and a fourth valve 15 is provided at the oil outlet pipe section 13; the third valve 14 and the fourth valve 15 are both stop valves, and the heating chamber 11 is isolated by shutting off the third valve 14 and the fourth valve 15, so that the operating personnel can more conveniently maintain the heating chamber 11.

[0061] In one or several embodiments, the housing 1 is provided with a drain outlet connected to the heating chamber 11, and a drain valve 6 is provided at the drain outlet; when the heating chamber 11 is maintained, dirt in the heating chamber 11 can be discharged through the drain valve 6, which facilitates the maintenance of the heating chamber 11; the drain outlet is usually provided at the bottom side of the housing 1.

[0062] In one or more embodiments, the control unit 32 is a temperature control solenoid valve, which can adjust the opening and closing degree of the temperature control solenoid valve according to the temperature data of the temperature measuring unit 31, thereby adjusting the flow rate of steam.

[0063] A liquid lubricating oil heating device in this embodiment can be quickly heated by the heating coil 2 after the lubricating oil enters the heating chamber 11; the steam flow entering the heating coil 2 is adjusted by the control device, thereby overcoming the initial temperature change of the lubricating oil caused by seasonal changes, so that the lubricating oil passing through the heating chamber 11 can always be fully heated; the normal use of the purified air accident spherical tank at the rear end is guaranteed, which is beneficial to the safe and stable operation of the factory area purified air duct network.

[0064] A method for heating lubricating oil in this embodiment, the lubricating oil from the auxiliary oil pump enters the heating chamber 11 through the oil inlet pipe section 12, and the lubricating oil is evenly sprinkled onto the heating coil 2 below through the dispersion device 4, and the lubricating oil pressure is required to be around 0.3-0.5MPa; the heating coil 2 is composed of multiple groups of stainless steel straight tubes and fins 26, which increase the contact area with the lubricating oil; a temperature control solenoid valve is set at the air inlet pipe section 21, and the steam flow rate is controlled according to the oil temperature of the oil inlet pipe section 12. The steam pressure is controlled at 0.2-0.3MPa, and the corresponding saturation temperature is 120-133 degrees Celsius. The steam after heat exchange is discharged into the ditch condensate discharge main pipe through the exhaust pipe section 22 to discharge condensate.

[0065] Example 2

[0066] like Figure 6 A liquid lubricating oil heating device is shown, and its structure is substantially the same as that of Example 1. The difference from Example 1 is that a temperature monitoring device 7 for monitoring the temperature of the lubricating oil is provided in the box body 1, and a measuring hole is opened in the box body 1, and a temperature measuring probe of the temperature monitoring device 7 extends from the measuring hole into the heating chamber 11.

[0067] The temperature monitoring device 7 can monitor the temperature of the lubricating oil in the heating chamber 11 to ensure that the lubricating oil is fully heated.

[0068] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A liquid lubricating oil heating device, characterized in that: include A box body (1), the box body (1) being provided with a heating chamber (11), an oil inlet pipe section (12) and an oil outlet pipe section (13), the oil inlet pipe section (12) and the oil outlet pipe section (13) being respectively connected to the heating chamber (11); A heating coil (2), the heating coil (2) being located in the heating chamber (11), the heating coil (2) being provided with an air intake pipe section (21) and an air exhaust pipe section (22), the air intake pipe section (21) and the air exhaust pipe section (22) respectively penetrating the box body (1); A control device, the control device comprising a temperature measuring unit (31) and a control unit (32), the control unit (32) being connected to the air intake pipe section (21), the temperature measuring unit (31) being connected to the oil intake pipe section (12), and the temperature measuring unit (31) being communicatively connected to the control unit (32).

2. A liquid lubricating oil heating device according to claim 1, characterized in that: The heating chamber (11) is provided with a dispersion device (4), the dispersion device (4) is connected to the housing (1), the dispersion device (4) is in communication with the oil inlet pipe section (12), the dispersion device (4) is located on the top side of the heating coil (2), and the oil outlet pipe section (13) is in communication with the heating chamber (11) located on the bottom side of the heating coil (2).

3. A liquid lubricating oil heating device according to claim 2, characterized in that: The dispersion device (4) comprises a dispersion pipe section (41) and a plurality of spray heads (42); one end of the dispersion pipe section (41) is closed and the other end is connected to the oil inlet pipe section (12); the dispersion pipe section (41) is connected to the housing (1); the plurality of spray heads (42) are arranged on the side wall of the dispersion pipe section (41); and the spray heads (42) are connected to the dispersion pipe section (41).

4. A liquid lubricating oil heating device according to claim 1, characterized in that: The heating coil (2) comprises a first joint member (23), a second joint member (24) and a plurality of heating pipe sections (25) arranged at intervals, the first joint member (23) and the second joint member (24) being respectively connected to two ends of the heating pipe section (25), a plurality of the heating pipe sections (25) being connected to the first joint member (23), a plurality of the heating pipe sections (25) being connected to the second joint member (24), the first joint member (23) being in communication with the intake pipe section (21), and the second joint member (24) being in communication with the exhaust pipe section (22).

5. A liquid lubricating oil heating device according to claim 4, characterized in that: The heating coil (2) further comprises a fin (26), the heating pipe section (25) passes through the fin (26), and a plurality of the fins (26) are arranged at intervals on the heating pipe section (25).

6. The liquid lubricating oil heating device according to claim 1, characterized in that: The air intake pipe section (21) and the air exhaust pipe section (22) are respectively detachably connected to the heating coil (2); the air intake pipe section (21) is provided with a first valve (27), and the air exhaust pipe section (22) is provided with a second valve (28).

7. The liquid lubricating oil heating device according to claim 1, characterized in that: The invention also comprises a bypass pipeline (5), one end of which is in communication with the oil inlet pipe section (12) and the other end of which is in communication with the oil outlet pipe section (13); a bypass valve (51) is provided on the bypass pipeline (5); along the flow direction of the lubricating oil, the bypass pipeline (5) is located on the downstream side of the temperature measuring unit (31); and a one-way valve (16) is provided on the oil outlet pipe section (13); the one-way valve (16) is located between the casing (1) and the bypass pipeline (5).

8. The liquid lubricating oil heating device according to claim 1, characterized in that: The box body (1) is provided with a temperature monitoring device (7) for monitoring the temperature of the lubricating oil. The box body (1) is provided with a measuring hole, and a temperature measuring probe of the temperature monitoring device (7) extends from the measuring hole into the heating chamber (11).

9. The liquid lubricating oil heating device according to claim 1, characterized in that: The box body (1) is provided with a sewage outlet connected to the heating chamber (11), and the sewage outlet is provided with a sewage valve (6).

10. A liquid lubricating oil heating device according to any one of claims 1 to 9, characterized in that: The oil inlet pipe section (12) is provided with a third valve (14), and the oil outlet pipe section (13) is provided with a fourth valve (15).

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