Anti-explosion safety type heat conducting oil furnace

Abstract

The application discloses an explosion-proof safe heat conducting oil furnace and relates to the technical field of heat conducting oil furnaces. The explosion-proof safe heat conducting oil furnace comprises a heat conducting oil furnace body, a base frame, a furnace body fixed on the base frame, a pretreatment assembly arranged on the base frame, a temperature insulation box fixed on the base frame, a transmission pipe for guiding oil liquid fixed on the temperature insulation box, a fine filter screen fixed in the temperature insulation box, a floating plate arranged in the temperature insulation box, a counterweight arranged at the bottom of the floating plate, a positioning ball arranged at the top of the floating plate and a homogenizing assembly arranged on the temperature insulation box. Through the arrangement of the pretreatment assembly and the adjusting piece, the heat conducting oil after multiple times of heating can be stored in the space of the temperature insulation box. With the increase of the temporary oil storage capacity, the floating plate gradually moves upwards, so that the first rotating rod and the stirring piece are actively rotated, the temperature of the heat conducting oil in the temperature insulation box is uniformly distributed, and the heat exchange uniform heating demand of the subsequent heat taking equipment is met.

Description

Technical Field

[0001] This invention relates to the field of thermal oil furnace technology, and in particular to an explosion-proof and safe thermal oil furnace. Background Technology

[0002] A thermal oil heater (also known as an organic heat carrier furnace, thermal oil boiler, or hot oil furnace) is a heat energy conversion device that uses thermal oil (organic heat carrier) as a circulating heat transfer medium and obtains heat through combustion (coal, oil, gas, biomass) or electric heating to achieve stable high-temperature and low-pressure heating. In existing technologies, an explosion-proof thermal oil heater has gradually emerged, which mainly uses expansion tank nitrogen sealing low-temperature inerting, multiple safety interlocks, electrical explosion protection, structural pressure relief, and online monitoring to suppress the formation of combustible mixtures, eliminate ignition sources, and prevent overheating and leakage.

[0003] Existing thermal oil heaters typically transfer the thermal oil to heat-extracting equipment after heating is complete. However, due to process limitations, the thermal oil temperature is low and unevenly distributed at the beginning of operation. Under these conditions, the low-temperature thermal oil cannot provide effective heat exchange after entering the heat-using equipment, resulting in slow equipment heating and affecting production efficiency. Furthermore, the high viscosity and poor fluidity of the thermal oil in the low-temperature range may cause increased system resistance and pump power fluctuations. At the same time, uneven temperature distribution and local overheating can easily cause coking and carbon buildup in the thermal oil, shortening its service life and even leading to pipe rupture safety accidents. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] In view of the problems existing in the above and / or existing explosion-proof and safe thermal oil heaters, the present invention is proposed.

[0006] Therefore, the problem to be solved by the present invention is how to address the issue that in the initial operation of existing thermal oil furnaces, the thermal oil temperature is low and the temperature distribution is uneven, which cannot provide effective heat exchange, may cause increased system resistance, pump power fluctuations, and is prone to coking and carbon buildup in the thermal oil, shortening the service life of the thermal oil, and even causing pipe rupture safety accidents.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an explosion-proof and safe thermal oil furnace, comprising a thermal oil furnace body including a base frame, a furnace body fixed on the base frame, a pretreatment assembly disposed on the base frame including a heat insulation box fixed on the base frame, a transmission pipe for guiding oil fixed on the heat insulation box, a fine filter screen fixed inside the heat insulation box, a float plate disposed inside the heat insulation box, a counterweight block disposed at the bottom of the float plate, a magnetic block disposed at the top of the float plate, a homogenization assembly disposed on the heat insulation box, the homogenization assembly including a second rotating rod penetrating the float plate, a first rotating rod disposed outside the second rotating rod, a stirring element disposed at the bottom of the first rotating rod, an induction sleeve disposed at the top of the heat insulation box, an output pipe connected to one side of the heat insulation box, and a first electric valve fixed on the output pipe.

[0008] As a preferred embodiment of the explosion-proof and safe thermal oil furnace of the present invention, the bottom of the float is fixed with a connecting rope, the bottom end of the connecting rope is fixed with a counterweight, and a vertical rod is fixed at the center of the top of the float, the top of the vertical rod is fixed with the bottom of a magnetic block.

[0009] As a preferred embodiment of the explosion-proof and safe thermal oil furnace of the present invention, the second rotating rod is provided with a spiral groove, the float plate is fixed with a positioning ball that cooperates with the spiral groove, and the top of the second rotating rod is rotatably connected to the insulation box through a sealed bearing.

[0010] In a preferred embodiment of the explosion-proof and safe thermal oil furnace of the present invention, a transmission component is provided between the second rotating rod and the first rotating rod. The transmission component includes a driving gear fixed to the outer ring of the second rotating rod and a driven gear fixed to the outer ring of the first rotating rod, wherein the driven gear meshes with the driving gear.

[0011] As a preferred embodiment of the explosion-proof and safe thermal oil furnace of the present invention, the stirring component includes a hollow branch pipe fixed on the first rotating rod, a drain check valve fixed on the hollow branch pipe, a lever connected to one end of the hollow branch pipe, and a circumferential array of inclined grooves on the lever.

[0012] As a preferred embodiment of the explosion-proof and safe thermal oil furnace of the present invention, a protective cover for the protective induction sleeve is fixed with screws at the center of the top of the insulation box, and the outer ring of the induction sleeve is fixed inside the protective cover.

[0013] As a preferred embodiment of the explosion-proof and safe thermal oil furnace of the present invention, wherein: a second electric valve for venting is fixed at the top of the inner cavity of the insulation box, a drain valve is fixed at the bottom of one side of the insulation box, and a guide plate for guiding impurities is fixed at the bottom of the inner cavity of the insulation box.

[0014] As a preferred embodiment of the explosion-proof and safe thermal oil furnace of the present invention, the top of the insulation box is provided with an installation groove, and an adjustment component is provided in the installation groove. The adjustment component includes a gas storage shell that is bolted to the installation groove, and the bottom end of the gas storage shell extends into the insulation box.

[0015] As a preferred embodiment of the explosion-proof and safe thermal oil furnace of the present invention, an elastic membrane is fixed on both sides of the gas storage shell, and an air injection valve is embedded in the top of the gas storage shell.

[0016] As a preferred embodiment of the explosion-proof and safe thermal oil furnace of the present invention, a centrifugal pump is bolted to the base frame, the inlet end of the centrifugal pump is connected to an oil inlet pipe, the outlet end of the centrifugal pump is connected to the input end of the furnace body, the output end of the centrifugal pump is connected to an oil drain pipe, and the end of the oil drain pipe away from the furnace body is connected to a protective valve for purging nitrogen and a coarse filter for filtering impurities in the thermal oil via a three-way valve.

[0017] The beneficial effects of this invention are as follows: by setting up the pretreatment components and adjustment components, the heat transfer oil after multiple heatings can be stored in the space of the insulation box. As the temporary oil storage increases, the float gradually moves upward, thereby causing the first rotating rod and the stirring component to rotate actively, so that the temperature of the heat transfer oil in the insulation box is evenly distributed, which meets the uniform heat exchange requirements of the subsequent heat extraction equipment. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a scene illustration of an explosion-proof and safe thermal oil heater.

[0020] Figure 2 This is a structural diagram of an explosion-proof and safe thermal oil heater.

[0021] Figure 3 This is a structural diagram of the pretreatment components for an explosion-proof and safe thermal oil furnace.

[0022] Figure 4 This is a cross-sectional view of the pretreatment components of an explosion-proof and safe thermal oil furnace.

[0023] Figure 5 Another perspective view of the pretreatment components of an explosion-proof and safe thermal oil furnace in a semi-sectional state.

[0024] Figure 6 This is a structural diagram of the homogenization component for an explosion-proof and safe thermal oil heater.

[0025] Figure 7 A schematic diagram showing the separation of the float plate and protective cover in an explosion-proof and safe thermal oil heater.

[0026] Figure 8 A half-sectional view of the insulation box of an explosion-proof and safe thermal oil heater.

[0027] Figure 9 For explosion-proof and safe thermal oil heaters Figure 6 Enlarged view of point A in the middle.

[0028] In the diagram: 1. Thermal oil furnace body; 11. Base frame; 12. Furnace body; 13. Centrifugal pump; 14. Oil inlet pipe; 15. Oil outlet pipe; 16. Protective valve; 17. Control box; 18. Coarse filter; 2. Pretreatment assembly; 21. Insulation box; 211. Diverting plate; 212. Mounting groove; 22. Transmission pipe; 23. Homogenization assembly; 231. First rotating rod; 232. Transmission component; 2321. Drive gear; 2322. Driven gear; 233. Second rotating rod; 2331. Spiral groove; 234. Stirring component. ; 2341, Hollow branch pipe; 2342, Drainage check valve; 2343, Paddle bar; 2344, Inclined groove; 235, Infusion pipe; 24, Protective cover; 241, Sensing sleeve; 25, Fine filter screen; 26, Output pipe; 261, First electric valve; 27, Second electric valve; 28, Drain valve; 29, Float; 291, Connecting rope; 292, Counterweight; 293, Vertical rod; 294, Positioning ball; 295, Magnetic block; 3, Adjusting component; 31, Gas storage shell; 32, Elastic membrane; 33, Gas injection valve. Detailed Implementation

[0029] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0030] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0031] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0032] Example 1, referring to Figure 1 and Figure 2This is the first embodiment of the present invention, which provides an explosion-proof and safe thermal oil furnace, which includes a thermal oil furnace body 1, a pretreatment component 2, and an adjusting component 3.

[0033] Specifically, the thermal oil furnace body 1 includes a base frame 11, on which the furnace body 12 is fixed.

[0034] Specifically, the pretreatment component 2 is mounted on the base frame 11 and includes an insulated box 21 fixed on the base frame 11. A transmission pipe 22 for guiding oil is fixed on the insulated box 21. A fine filter screen 25 is fixed inside the insulated box 21. A float 29 is installed inside the insulated box 21. A counterweight block 292 is installed at the bottom of the float 29. A magnetic block 295 is installed at the top of the float 29. A homogenization component 23 is installed on the insulated box 21. The homogenization component 23 includes a second rotating rod 233 that penetrates the float 29. A first rotating rod 231 is installed outside the second rotating rod 233. A stirring element 234 is installed at the bottom of the first rotating rod 231. An induction sleeve 241 is installed at the top of the insulated box 21. An output pipe 26 is connected to one side of the insulated box 21. A first electric valve 261 is fixed on the output pipe 26.

[0035] Specifically, the top of the insulation box 21 is provided with an installation groove 212, and an adjustment component 3 is provided in the installation groove 212. The adjustment component 3 includes a gas storage shell 31 that is bolted to the installation groove 212, and the bottom end of the gas storage shell 31 extends into the insulation box 21.

[0036] Example 2, refer to Figures 2-9 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0037] Specifically, a connecting rope 291 is fixed to the bottom of the float 29, and the bottom end of the connecting rope 291 is fixed to the counterweight 292.

[0038] A vertical rod 293 is fixed at the center of the top of the float 29, and the top of the vertical rod 293 is fixed to the bottom of the magnetic block 295.

[0039] The magnetic block 295 includes a permanent magnet located inside and flame-retardant modified PBT wrapped around the permanent magnet. The induction sleeve 241 includes a reed switch located inside and flame-retardant modified PBT included around the reed switch. Through the setting of flame-retardant modified PBT, it not only has the characteristics of electrical insulation, flame retardancy and heat resistance, but also has the characteristics of non-magnetic conduction. It is "transparent" to the magnetic field, hardly weakens the magnetic field lines, and does not affect the normal coupling operation between the magnetic block 295 and the induction sleeve 241.

[0040] The connecting rope 291 includes a high-strength polyimide fiber bundle core and an insulating rubber sleeve wrapped around the polyimide fiber bundle core. The material properties can be used to prevent the connecting rope 291 from coming into contact with the heat transfer oil and accidentally igniting it, thus fundamentally eliminating the fire hazard.

[0041] Specifically, a spiral groove 2331 is provided on the second rotating rod 233, and a positioning ball 294 that cooperates with the spiral groove 2331 is fixed in the float plate 29. The top of the second rotating rod 233 is rotatably connected to the heat insulation box 21 through a sealed bearing.

[0042] With this design, when the float 29 undergoes active displacement, the second rotating rod 233 can be actively rotated in conjunction with the positioning ball 294 and the spiral groove 2331.

[0043] Specifically, a transmission component 232 is provided between the second rotating rod 233 and the first rotating rod 231. The transmission component 232 includes a driving gear 2321 fixed to the outer ring of the second rotating rod 233 and a driven gear 2322 fixed to the outer ring of the first rotating rod 231. The driven gear 2322 meshes with the driving gear 2321, and the specifications of the driving gear 2321 are larger than those of the driven gear 2322.

[0044] When the second rotating rod 233 drives the driving gear 2321 to rotate, the driven gear 2322 meshes and drives the first rotating rod 231 to rotate at an accelerated speed, thereby cooperating with the stirring element 234 to complete the uniform stirring of the heat transfer oil.

[0045] Specifically, the stirring component 234 includes a hollow branch pipe 2341 fixed on the first rotating rod 231, a drain check valve 2342 fixed on the hollow branch pipe 2341, and a lever 2343 rotatably connected to one end of the hollow branch pipe 2341. The lever 2343 has inclined grooves 2344 arranged in a circular array.

[0046] This design allows the inclined surface of the sloping trough 2344 to deflect the push bar 2343 when the sloping trough 2344 is disturbed by fluid, resulting in better overall mixing uniformity. The first rotating rod 231 is hollow and connected to the hollow branch pipe 2341. The top of the first rotating rod 231 is equipped with an infusion pipe 235 with a built-in valve. The bottom ends of the infusion pipe 235 extend into the first rotating rod 231 and are rotatably connected to the inner wall of the first rotating rod 231 through sealed bearings.

[0047] Specifically, a protective cover 24 is fixed to the center of the top of the insulation box 21 with screws, and the outer ring of the induction sleeve 241 is fixed inside the protective cover 24.

[0048] Specifically, a second electric valve 27 for venting is fixed at the top of the inner cavity of the insulation box 21.

[0049] Specifically, elastic films 32 are fixed on both sides of the gas storage shell 31, and an inflation valve 33 is embedded on the top of the gas storage shell 31. The elastic film 32 is made of fluororubber, which has the characteristics of high temperature resistance and strong corrosive chemical substances (excellent oil and solvent resistance), and is well-suited for the high temperature environment inside the insulated box 21.

[0050] In practical applications, a small electronic barometer is installed on the gas storage shell 31. According to the actual pressure reduction and buffering requirements, an appropriate amount of inert gas can be injected into the gas storage shell 31 through the gas injection valve 33 under the monitoring of the small electronic barometer, so that the initial gas pressure in the gas storage shell 31 reaches the preset value.

[0051] Specifically, a centrifugal pump 13 is bolted to the base frame 11. The inlet end of the centrifugal pump 13 is connected to an oil inlet pipe 14. The outlet end of the centrifugal pump 13 is connected to the input end of the furnace body 12. The output end of the centrifugal pump 13 is connected to an oil drain pipe 15. The end of the oil drain pipe 15 away from the furnace body 12 is connected to a protective valve 16 for charging nitrogen and a coarse filter 18 for filtering impurities in the heat transfer oil through a three-way valve. The end of the transmission pipe 22 away from the base frame 11 is connected to the oil outlet end of the coarse filter 18.

[0052] A control box 17 is bolted to the base frame 11. The control box 17 is used to control the working status of the centrifugal pump 13 and to meet the power supply requirements of the induction sleeve 241, the first electric valve 261 and the second electric valve 27. It should be noted that the control box 17 is equipped with a time relay, which is used to delay the control of the first electric valve 261 when it receives the opening or closing signal. The working principle of this part is all existing technology, which can be clearly understood by those skilled in the art, and will not be described in detail here.

[0053] Example 3, referring to Figures 2-9 This is the third embodiment of the present invention, which is based on the first two embodiments.

[0054] Specifically, the bottom of the transmission pipe 22 passes through the fine filter screen 25 and extends to the bottom of the fine filter screen 25. A drain valve 28 is fixed to the bottom of one side of the insulation box 21, which is used to discharge impurities deposited at the bottom of the insulation box 21 when it is open, as shown in the attached diagram of the instruction manual. Figure 4 As shown, an inclined guide plate 211 is fixed at the bottom of the inner cavity of the heat insulation box 21. This plate is used to concentrate the impurities intercepted by the fine filter screen 25 on one side of the heat insulation box 21 and is positioned close to the drain valve 28. This allows the impurities to be discharged quickly when the drain valve 28 is opened.

[0055] In practical applications, a heat-insulating protective shell is fixed to the top of the inner cavity of the heat-insulating box 21 and outside the driving gear 2321 and the driven gear 2322. This shell is used to prevent the driving gear 2321 and the driven gear 2322 from being contaminated by the environment and affected by the high temperature of the heat transfer oil. The second rotating rod 233 and the first rotating rod 231 pass through the protective shell and are rotatably connected to the protective shell through a sealed bearing. At the same time, lubricating oil can be pre-mixed in the protective shell according to actual needs to ensure the proper operation of the driving gear 2321 and the driven gear 2322.

[0056] It should be noted that, in order to avoid residual heat transfer oil on the internal components of the pretreatment component 2 during the heating stage, the components that come into direct contact with the heat transfer oil, such as the inner wall of the insulation box 21, the surface of the diversion plate 211, the inner wall of the transmission pipe 22, the surface of the first rotating rod 231, the surface of the second rotating rod 233, the spiral groove 2331, the surface of the hollow branch pipe 2341, the surface of the lever 2343, the inclined groove 2344, the inner wall of the output pipe 26, the surface of the float 29, the surface of the connecting rope 291, the surface of the counterweight 292, the surface of the positioning ball 294, and the surface of the gas storage shell 31, are all coated with a non-stick polytetrafluoroethylene coating. This coating has the advantages of being non-stick, self-lubricating, low-friction, resistant to high and low temperatures, resistant to strong corrosion, electrically insulating, resistant to aging, and hygienic and non-toxic. The surface is not easily adhered to by oil and impurities, has a wide applicable temperature range, extremely strong chemical stability, and also has good wear-reducing, wear-resistant, and insulating properties.

[0057] It should be noted that during the initial start-up phase, the low-temperature heat transfer oil, after being heated by the furnace body 12, already possesses a certain temperature, although it has not yet reached the preset temperature value. However, its viscosity has been greatly reduced, giving it a certain degree of fluidity and buoyancy. This phenomenon occurs because the flame or heating tubes within the furnace body 12 are locally hot, and heat is first transferred to the heat transfer oil and the inner wall of the furnace tubes closest to the heat source. Since the oil does not circulate, this portion of hot oil can only transfer heat to the colder oil further away through extremely slow heat conduction. Meanwhile, the furnace body (especially the parts far from the flame) is still very cold and continuously absorbs heat. Therefore, the overall heat loss is large, and the oil temperature cannot rise.

[0058] After the furnace body 12 has been running for a period of time, all parts of the furnace body 12 have absorbed heat to saturation and the temperature tends to be uniform. At this time, the heat transfer oil is immersed in it and absorbs heat evenly from all directions. At this time, the low temperature heat transfer oil will be heated to the preset temperature value.

[0059] In the initial working state, the low-temperature heat transfer oil is heated by the furnace body 12 and then coarsely filtered by the coarse filter 18. It is then introduced into the insulation box 21 through the transmission pipe 22 for temporary storage. After the furnace body 12 has been working for a period of time, a certain amount of heat transfer oil is introduced into the insulation box 21 and temporarily stored in the insulation box 21. Then, the first electric valve 261 is automatically opened, so that the heat transfer oil processed in the insulation box 21 is discharged through the output pipe 26 to supply heat for subsequent heat extraction equipment.

[0060] In the above process, at the beginning, the second electric valve 27 is opened, and the heat transfer oil that has been initially heated but has not yet reached the standard temperature is introduced into the insulation box 21 through the transmission pipe 22. As the working time of the furnace body 12 progresses, the internal temperature distribution becomes uniform, and at this time the temperature of the heat transfer oil after being treated by the furnace body 12 is in the standard state.

[0061] After being filtered through the fine filter screen 25, the two types of heat transfer oil at different temperatures are temporarily stored in the insulation box 21. As the amount of oil increases, the float plate 29 is gradually moved upward by buoyancy. With the cooperation of the positioning ball 294 and the spiral groove 2331, the second rotating rod 233 rotates actively. With the cooperation of the driving gear 2321 and the driven gear 2322, the first rotating rod 231 rotates faster, which in turn cooperates with the hollow branch pipe 2341 to complete the stirring of the heat transfer oil. At the same time, with the cooperation of the swivel bar 2343 and the inclined groove 2344, the overall stirring range is increased, and the stirring uniformity is further improved, so that the temperature distribution of the heat transfer oil temporarily stored in the insulation box 21 is uniform, and the temperature difference between it and the standard heat transfer oil is further reduced.

[0062] As the amount of heat transfer oil increases, the liquid level gradually rises, supporting the float 29 to move further upward, causing the vertical rod 293 to move upward, simultaneously driving the magnetic block 295 into the induction sleeve 241. The first electric valve 261 opens after a delay, and the second electric valve 27 closes immediately. After mixing and stirring, the heat transfer oil with a uniform temperature distribution will be discharged through the output pipe 26.

[0063] As heat transfer oil is continuously injected through transmission pipe 22 and discharged through output pipe 26, and in conjunction with the operation of the overall transmission system, the level of heat transfer oil in the insulation box 21 inevitably fluctuates, which in turn causes changes in transmission pressure.

[0064] At this time, the float 29 rises and falls synchronously with the liquid level with the counterweight 292, which causes the volume of the gas phase space at the top of the insulation box 21 to change accordingly. The gas pressure changes accordingly, causing the elastic membrane 32 to undergo elastic deformation. Since the gas storage shell 31 is pre-filled with inert gas and maintains a certain pressure, this deformation can effectively buffer pressure fluctuations, thereby reducing the range of transmission pressure changes and ensuring the stability of heat transfer oil transmission.

[0065] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An explosion-proof and safe thermal oil heater, characterized in that: include, The thermal oil furnace body (1) includes a base frame (11), on which the furnace body (12) is fixed. The pretreatment component (2), mounted on a base frame (11), includes an insulated box (21) fixed to the base frame (11), a transmission pipe (22) for guiding oil is fixed on the insulated box (21), a fine filter screen (25) is fixed inside the insulated box (21), a float plate (29) is provided inside the insulated box (21), a counterweight (292) is provided at the bottom of the float plate (29), and a magnetic block (295) is provided at the top of the float plate (29). A homogenization component (23) is provided, the homogenization component (23) includes a second rotating rod (233) that penetrates the float (29), a first rotating rod (231) is provided on the outside of the second rotating rod (233), a stirring component (234) is provided at the bottom of the first rotating rod (231), a sensing sleeve (241) is provided on the top of the heat insulation box (21), an output pipe (26) is connected to one side of the heat insulation box (21), and a first electric valve (261) is fixed on the output pipe (26).

2. The explosion-proof and safe thermal oil heater as described in claim 1, characterized in that: A connecting rope (291) is fixed to the bottom of the float (29), and the bottom end of the connecting rope (291) is fixed to the counterweight (292). A vertical rod (293) is fixed at the center of the top of the float (29), and the top of the vertical rod (293) is fixed to the bottom of the magnetic block (295).

3. The explosion-proof and safe thermal oil heater as described in claim 1, characterized in that: The second rotating rod (233) has a spiral groove (2331) and a positioning ball (294) that cooperates with the spiral groove (2331) is fixed inside the float (29). The top of the second rotating rod (233) is rotatably connected to the insulation box (21) through a sealed bearing.

4. The explosion-proof and safe thermal oil heater as described in claim 1, characterized in that: A transmission component (232) is provided between the second rotating rod (233) and the first rotating rod (231). The transmission component (232) includes a driving gear (2321) fixed to the outer ring of the second rotating rod (233) and a driven gear (2322) fixed to the outer ring of the first rotating rod (231). The driven gear (2322) meshes with the driving gear (2321).

5. The explosion-proof and safe thermal oil heater as described in claim 1, characterized in that: The stirring component (234) includes a hollow branch pipe (2341) fixed on the first rotating rod (231), a drain check valve (2342) fixed on the hollow branch pipe (2341), and a lever (2343) rotatably connected to one end of the hollow branch pipe (2341). The lever (2343) has inclined grooves (2344) arranged in a circular array.

6. The explosion-proof and safe thermal oil heater as described in claim 1, characterized in that: The protective cover (24) of the protective induction sleeve (241) is fixed to the center of the top of the insulation box (21) with screws, and the outer ring of the induction sleeve (241) is fixed inside the protective cover (24).

7. The explosion-proof and safe thermal oil heater as described in claim 1, characterized in that: The top of the inner cavity of the insulation box (21) is fixed with a second electric valve (27) for venting, the bottom of one side of the insulation box (21) is fixed with a drain valve (28), and the bottom of the inner cavity of the insulation box (21) is fixed with a guide plate (211) for guiding impurities.

8. The explosion-proof and safe thermal oil heater as described in claim 7, characterized in that: The top of the insulation box (21) is provided with an installation groove (212), and an adjustment component (3) is provided in the installation groove (212). The adjustment component (3) includes a gas storage shell (31) that is bolted to the installation groove (212), and the bottom end of the gas storage shell (31) extends into the insulation box (21).

9. The explosion-proof and safe thermal oil heater as described in claim 8, characterized in that: Both sides of the gas storage shell (31) are fixed with elastic films (32), and the top of the gas storage shell (31) is fitted with an air injection valve (33).

10. The explosion-proof and safe thermal oil furnace as described in claim 9, characterized in that: A centrifugal pump (13) is bolted to the base frame (11). The inlet end of the centrifugal pump (13) is connected to an oil inlet pipe (14). The outlet end of the centrifugal pump (13) is connected to the input end of the furnace body (12). The output end of the centrifugal pump (13) is connected to an oil drain pipe (15). The end of the oil drain pipe (15) away from the furnace body (12) is connected to a protective valve (16) for charging nitrogen and a coarse filter (18) for filtering impurities in the heat transfer oil through a three-way valve.

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