Online heating device

Abstract

The present invention discloses an online heating device, comprising: a heating chamber shell, wherein a liquid inlet and a liquid outlet are respectively provided on both sides of the bottom of the heating chamber shell; a liquid inlet pipe, which is provided inside the heating chamber shell, wherein the top of the liquid inlet pipe is connected to the inside of the heating chamber shell, and the bottom of the liquid inlet pipe is connected to the liquid inlet; a heating pipe, which is spirally arranged on the outside of the liquid inlet pipe; and spiral blades, which are provided on the inner wall of the heating chamber shell and inserted into the flow gap between the upper and lower heating pipes along the height direction of the liquid inlet pipe, so as to spirally separate the fluid space and establish a fluid spiral channel. The present invention provides a double-layer spiral spaced heating pipe, wherein the inner and outer heating pipes have the same spiral direction, and there is a gap between the heating pipes, so that the liquid around the heating pipes can circulate with each other, and the heat dissipation is good.

Description

Technical Field

[0001] The invention belongs to the technical field of online heating, and in particular relates to an online heating device. Background Art

[0002] In-line heaters are a popular heating device in the semiconductor industry, used to increase, maintain, and heat flowing liquid media. When the heating medium enters the heater's chamber under pressure, it utilizes the principles of fluid thermodynamics to evenly dissipate the enormous heat generated by the heating element, bringing the heated medium's temperature to the user's process requirements. Electric heating converts electrical energy into thermal energy. Furthermore, various cleaning chemical additives are added to the liquid during wet cleaning processes.

[0003] The current online heaters have the following problems: (1) Semiconductor wet cleaning has special requirements for the process, and the cleanliness of the chemical liquid needs to be ensured. Since the chemical liquid is corrosive, it is particularly easy to corrode the heater and cause pollution; (2) The structure of the existing heater cannot achieve the heating effect required by the process, and the continuous heating capacity is low, the efficiency is low, the energy consumption is high, the temperature is low, and the heat transfer time is short; (3) The existing heater uses the installation and processing thread on the body, which is very troublesome during assembly and disassembly, and the thread is easily damaged. If the seal is not good, it is easy to leak, and the replacement and maintenance costs are extremely high.

[0004] The main measures taken to address the above problems are as follows: (1) Use PFA to cover the heating tube; although it solves the anti-corrosion problem, the problem is that once the PFA tube breaks, it will not be detected, and there are no safety and anti-slip measures; (2) Use high-power, large-size heaters or significantly reduce the flow rate of the liquid medicine; using a high-power heater will cause the heater to increase in size, and the equipment will not have enough installation space. At the same time, the electricity cost will also increase exponentially. Reducing the flow rate of the liquid medicine will lead to reduced cleaning efficiency and cannot fundamentally solve the problem; (3) Arrange two workers to jointly install and disassemble, or use special tools and clamps for disassembly and assembly. If the screw thread is damaged and cannot be used, the entire heater will be replaced. However, such measures will lead to extremely high labor and maintenance costs for the company and poor human-machine operability. Summary of the Invention

[0005] In response to the problems existing in the prior art, the present invention provides an online heating device, which controls the liquid to be heated evenly around the heating tube by setting a turbulent structure inside the heating container, thereby improving the heat transfer efficiency of the liquid.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] The present invention provides an online heating device, comprising:

[0008] A heating chamber shell, wherein a liquid inlet and a liquid outlet are respectively provided on both sides of the bottom of the heating chamber shell;

[0009] a liquid inlet pipe, disposed inside the heating chamber housing, wherein the top of the liquid inlet pipe is in communication with the interior of the heating chamber housing, and the bottom of the liquid inlet pipe is in communication with the liquid inlet port;

[0010] A heating tube is spirally arranged on the outside of the liquid inlet tube;

[0011] The spiral blades are arranged on the inner wall of the heating chamber shell and inserted into the flow gap between the upper and lower heating tubes along the height direction of the liquid inlet tube to spirally separate the fluid space and establish a fluid spiral channel.

[0012] As a preferred technical solution, the heating tube is provided with an inner and outer layer, and the spiral direction and pitch of the inner and outer layers are the same.

[0013] As a preferred technical solution, the heating tube is wound with a constant pitch spiral, or the heating tube is wound with a variable pitch spiral.

[0014] As a preferred technical solution, the heating tube is surrounded by an upper and lower double-layer spaced spiral, and the spiral blades are inserted between the upper and lower double-layer heating tubes.

[0015] As a preferred technical solution, the outside of the heating tube is covered with a PFA tube, and nitrogen is filled between the heating tube and the PFA tube.

[0016] As a preferred technical solution, one end of the PFA tube is sealed and connected to one end of the heating tube, and a sealed joint is provided between the other end of the PFA tube and the heating tube.

[0017] As a preferred technical solution, the sealing joint is connected to a pressure monitor.

[0018] As a preferred technical solution, the outer diameter of the spiral blade matches the inner diameter of the heating chamber shell, and the inner diameter of the spiral blade matches the outer diameter of the liquid inlet pipe, so that the spiral blade is fixed between the heating chamber shell and the liquid inlet pipe.

[0019] As an optimal technical solution, the spiral blade is fixed to the inner wall of the heating chamber shell, and the inner diameter of the spiral blade is larger than the outer diameter of the cylinder formed by the outer heating tube along the liquid inlet tube, so that the spiral blade and the outer heating tube are in a gap fit.

[0020] As a preferred technical solution, the heating chamber shell includes an upper shell and a lower shell, the liquid inlet pipe, the heating tube, and the spiral blades are arranged in the upper shell, the liquid inlet and the liquid outlet are arranged on the lower shell, and the lower shell and the upper shell are connected by a screw kit.

[0021] As a preferred technical solution, an upper cone is provided at the bottom of the upper shell extending outward, and a lower cone is provided at the top of the lower shell extending outward. The circumferences of the lower cone and the upper cone are both provided with U-shaped grooves for installing the screw kit, and a sealing O-ring is provided between the upper cone and the lower cone.

[0022] As a preferred technical solution, a first steel ring is fixedly installed on the upper end surface of the upper cone, and a second steel ring is fixedly installed on the lower end surface of the lower cone. A circular mounting hole is provided at a position of the first steel ring corresponding to the U-shaped groove, and a threaded mounting hole is provided at a position of the second steel ring corresponding to the U-shaped groove, and the thread of the threaded mounting hole matches the screw kit.

[0023] As a preferred technical solution, a protective cover shell is arranged around the connection between the upper shell and the lower shell, and the protective cover shell includes a first shield and a second shield. The longitudinal cross-sections of the first shield and the second shield are both L-shaped. The first shield is installed on the lower shell, and the second shield is snap-connected to the first shield.

[0024] As a preferred technical solution, it also includes a junction box, which is arranged at the bottom of the heating chamber shell. The outer diameter of the junction box is the same as the outer diameter of the heating chamber shell. The junction box is installed at the outlet end of the heating chamber shell and is fixed to the heating chamber shell by screws. A sealing cover is provided at the end of the junction box.

[0025] As a preferred technical solution, a temperature sensor is provided at the liquid outlet.

[0026] As a preferred technical solution, the outside of the heating chamber shell is provided with a mounting groove, which is suitable for the installation and fixation of T-shaped, L-shaped, and flange-shaped supports.

[0027] Compared with the prior art, the present invention has the following technical effects:

[0028] (1) The present invention sets up double-layer spiral spaced heating tubes, the inner and outer heating tubes have the same spiral direction, and there are gaps between the heating tubes. The heating tubes can be spaced at variable distances or at equal distances, so that the liquid around the heating tubes can flow between each other, and the heat dissipation is good.

[0029] (2) The present invention sets a spiral blade between the heating chamber shell and the heating tube. By controlling the drainage through the spiral blade, the heating circuit can be increased by 5 to 20 times, and the heating time of the liquid can be extended. Based on fluid mechanics analysis, the spiral separation space can make the liquid heat transfer efficiency more efficient and scientific. The spiral channel can make every part of the liquid fluid heated evenly and have a strong continuous heating capacity.

[0030] (3) The present invention adopts nitrogen detection protection, wraps a layer of PFA tube on the outer layer of the heating tube to prevent contamination, and fills nitrogen between the heating tube and the PFA tube. The nitrogen is connected to the pressure detector, and the background monitoring and inspection are more convenient, which can meet the customer's digital production safety needs.

[0031] (4) The present invention is provided with a flange steel ring locking structure, the steel rings are connected by a screw kit, a sealed protective cover is provided on the outside of the steel ring, and the protective cover is provided with a tightening buckle, so that the connection is more secure and the disassembly and assembly is more convenient.

[0032] (5) The present invention is provided with a circular integrated junction box, and the overall appearance design is more scientific, which avoids the wire tubes being exposed to the outside in a disorderly manner, and plays a role in safety and beauty. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 It is a structural schematic diagram of the online heating device of the present invention.

[0035] Figure 2 for Figure 1 A partial enlarged view of point A in the middle.

[0036] Figure 3 for Figure 1 A partial enlarged view of point B in the middle.

[0037] Figure 4 Schematic diagram of the arrangement of the heating tubes of the present invention.

[0038] Figure 5 It is a structural schematic diagram of the spiral blade of the present invention.

[0039] Figure 6 This is one of the schematic diagrams of the arrangement of the spiral blades of the present invention.

[0040] Figure 7 This is the second schematic diagram of the arrangement of the spiral blades of the present invention.

[0041] Figure 8 for Figure 7 Liquid heating flow diagram for spiral blade arrangement.

[0042] Figure 9 This is a flow diagram of a heating circuit in the prior art.

[0043] Figure 10It is the flow diagram of the heating circuit of the present invention.

[0044] Figure 11 Schematic diagram of the structure of the first steel ring (second steel ring) of the present invention.

[0045] Figure 12 It is a structural schematic diagram of the upper frustum (lower frustum) of the present invention.

[0046] Among them, the specific descriptions of the figure marks are as follows: heating chamber shell 1, heating tube 2, spiral blade 3, liquid inlet pipe 4, liquid inlet 5, liquid outlet 6, junction box 7, pressure detector 8, temperature sensor 9, upper shell 10, lower shell 11, upper frustum 12, lower frustum 13, first steel ring 14, second steel ring 15, screw kit 16, first protective cover 17, second protective cover 18, U-shaped groove 19, O-ring 20, sealing cover plate 21, PFA tube 22, mounting groove 23, sealing joint 24. DETAILED DESCRIPTION

[0047] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 cannot be understood as limiting the present invention.

[0048] like Figure 1 As shown, this embodiment provides an online heating device, including a heating chamber shell 1, a heating tube 2, a spiral blade 3, and a liquid inlet pipe 4. A liquid port 5 and a liquid outlet 6 are provided on both sides of the bottom of the heating chamber shell 1. The liquid inlet 5 is connected to the liquid inlet pipe 4, and the liquid outlet 6 is connected to the interior of the heating chamber shell 1. A temperature sensor 9 is provided at the liquid outlet 6. The liquid inlet pipe 4 is provided inside the heating chamber shell 1, the top of the liquid inlet pipe 4 is connected to the interior of the heating chamber shell 1, and the bottom of the liquid inlet pipe 4 is connected to the liquid inlet 5. The heating tube 2 is spirally arranged outside the liquid inlet pipe 4. The spiral blade 3 is provided on the inner wall of the heating chamber shell 1 and is inserted into the flow gap between the upper and lower heating tubes 2 along the height direction of the liquid inlet pipe 4 to spirally separate the fluid space and establish a fluid spiral channel.

[0049] like Figure 3 and Figure 4As shown, the heating tube 2 is divided into an inner ring and an outer ring. The inner and outer heating tubes 2 have the same spiral direction, rotating in a clockwise direction, and the pitch of the inner and outer heating tubes 2 is also the same. Gaps are provided between the upper and lower layers and the inner and outer layers of the heating tube 2, with the gap range of 3 to 15 mm. The fluid enters the liquid inlet tube 4 from the liquid inlet 5, then flows out from the top of the liquid inlet tube 4, entering the space inside the heating chamber shell 1, and finally flows out from the liquid outlet 6. On the one hand, the heating tube 2 heats the liquid inside the liquid inlet tube 4. On the other hand, after entering the interior space of the heating chamber shell 1, the liquid passes through each layer of the heating tube 2 and wraps around the heating tube 2, flowing over every inch of the heater surface. Since the flowing liquid passes through the gaps between the heating tubes 2, it also flows in series between the heating tubes 2, fully removing the heat from the surface of the heating tubes 2, so that the flowing liquid does not accumulate between the heating tubes 2. Preventing liquid accumulation will prevent the heat on the surface of the heating tube 2 from being removed in time, affecting the efficiency of the heating tube 2.

[0050] In this embodiment, the liquids between the heating tubes 2 circulate with each other, which also reduces resistance and increases flow rate to a certain extent, because the liquids collide with each other between the heating tubes 2. If there is no gap between the heating tubes 2, the liquids will flow in the opposite direction after the collision and collide head-on with the liquid flowing out normally from behind, which will reduce the liquid flow rate. Figure 1 and Figure 4 The pitch of the heating tube 2 can be equal or variable, that is, variable pitch C>B or equal pitch C=B. Figure 4 In the figure, a is the flow gap between the inner and outer heating tubes 2, b and c are the flow gaps between the upper and lower heating tubes 2, and the spiral blade 3 can be installed in the gap c. The upper and lower turns of the heating tube 2 can be an odd number or an even number. The heating tube 2 starts to spiral from the inner layer and then returns from the outer layer along the original path of the inner heating tube 2. Figure 4 The double-layer heating tube 2 shown is spirally coiled, including upper and lower double-layer heaters and inner and outer double-layer heaters.

[0051] Please continue to refer to Figure 1 and Figure 3 , a thin layer of PFA tube 22 is coated on the surface of the heating tube 2, and then nitrogen is filled between the heating tube and the PFA tube. There is a filling gap of 0.3mm-0.5mm on one side between the outer diameter of the heating tube 2 and the inner diameter of the PFA tube 22. One end of the PFA tube 22 is sealed and blocked with one end of the heating tube 2, and the other end of the PFA tube 22 is connected to the other end of the heating tube 2 through a sealing joint 24. The sealing joint 24 is connected to the external pressure detector 8. The pressure detector 8 will detect the nitrogen pressure change in real time, and the detection big data will be recorded and analyzed by the background system. Once the heating tube 2 or the PFA tube 22 is damaged, the nitrogen will leak, and the pressure detector 8 will detect the abnormality and alarm, which can be discovered in time to prevent the heating tube 2 from corroding the liquid.

[0052] like Figure 1 As shown, the inner wall of the heating chamber shell 1 is provided with spiral blades 3 along its height direction. The spiral blades 3 are made of PFA material. The inner wall of the heating chamber shell 1 is provided with positioning grooves for mounting the spiral blades 3, so that the spiral blades 3 do not rotate within the heating chamber shell 1. The spiral blades 3 can be removed, and the heater can still be used after removal. Because the heating circuit of existing heaters is short, the flow is irregular, the heat exchange efficiency is low, and some parts have good fluidity while others have poor fluidity. Some liquid rushes out before it heats up, and some liquid rushes out and remains in the heater for a long time before coming out. Taking a 96KW heater currently on the market as an example, at a flow rate of 24 liters of water per minute, the heater's heating tube 2 heats up to 160 degrees, while the water at the outlet does not even reach 100 degrees. The maximum heating temperature of 80 to 90 degrees is already the limit. In order to make the liquid temperature meet the process requirements, it is necessary to significantly reduce the liquid flow rate or use a high-power heater.

[0053] like Figure 5 As shown, the spiral blade 3 of the present invention is a spiral structure with an outer diameter of D, an inner diameter of d, and a thickness of T. The structure of the spiral blade 3 can increase the length of the heating circuit, so that the liquid can fully absorb heat energy. Under the same conditions, it can easily reach a temperature of more than 100 degrees, and the liquid with a high boiling point can be heated to a higher temperature. For comparison, when heating the liquid to 80-90 degrees, the existing heater requires 96KW of power, while the heater of the present invention does not require such a large power, and the heater of the present invention is small in size. Compared with the current heaters of the same power and size, under the same flow rate, the heating temperature of the heater provided by the present invention is estimated to be more than 30% higher, and it is estimated that 20% more liters of liquid can be heated per hour at the same temperature. At the same time, the energy consumption per hour is estimated to be reduced by 30%.

[0054] There are two ways to set the spiral blade 3 in the heater provided by the present invention, such as Figure 5 and Figure 6 As shown, the first setting method is: the outer diameter D of the spiral blade 3 matches the inner diameter of the heating chamber shell 1, the inner diameter d of the spiral blade 3 matches the outer diameter of the liquid inlet pipe 4, the pitch of the heating tube 2 is designed to be unequal, which can match the spiral blade 3, and the spiral blade 3 is installed in the gap C. The spiral blade 3 is fixed between the heating chamber shell 1 and the liquid inlet pipe 4. The installation method is: first put the spiral blade 3 into the heating chamber shell 1 and fix it, then insert the heating tube 2 into it by rotating it along the spiral direction of the spiral blade 3. Figure 5 and Figure 7As shown, the second arrangement is as follows: the thickness T of the spiral blade 3 is 2-6 mm, the pitch is 20-150 mm, the outer diameter D of the spiral blade 3 matches the inner diameter of the heating chamber housing 1, and the inner diameter of the spiral blade 3 is larger than the outer diameter of the cylinder formed by the outer heating tube 2 along the liquid inlet pipe 4, so that the spiral blade 3 and the outer heating tube 2 have a clearance fit. The installation method is as follows: the heating chamber housing 1 is provided with a positioning groove. First, the spiral blade 3 is placed in the heating chamber housing 1 and fixed, and then the heating tube 2 is directly inserted into the heating chamber housing 1.

[0055] like Figure 8 As shown, the heating circuit of the existing heater is linear, the heating time is short, the liquid cannot fully contact the heating circuit, and the heating efficiency is low. Figure 9 and Figure 10 As shown, the present invention controls the drainage by setting spiral blades 3, transforming the heating circuit from a straight line to a spiral shape, increasing the heating circuit by 5 to 20 times, and extending the heating time of the liquid. The spiral separation space can make the liquid heat transfer more efficient and scientific, and the spiral channel can make the liquid flow uniformly and heated at every location, with strong continuous heating capacity.

[0056] like Figure 2 、 Figure 11 and Figure 12As shown, the heating chamber shell 1 includes an upper shell 10 and a lower shell 11, the liquid inlet pipe 4, the heating tube 2, and the spiral blade 3 are arranged in the upper shell 10, the liquid inlet 5 and the liquid outlet 6 are arranged on the lower shell 11, and the lower shell 11 and the upper shell 10 are connected by a screw kit 16. In this embodiment, an upper truncated platform 12 is provided at the bottom of the upper shell 10, and a lower truncated platform 13 is provided at the top of the lower shell 11. The circumferences of the upper and lower truncated platforms 12 and 13 are both provided with U-shaped grooves 19 for mounting screw kits 16. A first steel ring 14 is fixedly mounted on the upper end surface of the upper truncated platform 12, and a second steel ring 15 is fixedly mounted on the lower end surface of the lower truncated platform 13. The first steel ring 14 has circular mounting holes at positions corresponding to the U-shaped grooves 19, and the second steel ring 15 has threaded mounting holes at positions corresponding to the U-shaped grooves 19. The threads of the threaded mounting holes match the screw kits 16. A sealing O-ring 20 is provided between the upper and lower truncated platforms 12 and 13. A protective cover is provided around the connection between the upper and lower shells 10 and 11. The protective cover includes a first shield 17 and a second shield 18. The longitudinal cross-sections of the first and second shields 17 and 18 are both L-shaped, with chamfers provided at right angles. The first protective cover 17 is mounted on the lower shell 11, and the second protective cover 18 is snap-fitted to the first protective cover 17. This embodiment uses two steel rings for sealing and locking. No fixtures or special wrenches are required. Only a conventional hexagonal wrench is needed to complete the disassembly and assembly. It can be completed by one person, and the human-machine operability is good. It is not affected by the temperature expansion of the heater and will not loosen or fall off. Since the existing heater is processed with threads on a resin shell, the threads will repeatedly rise and fall with the temperature, and the thread stress changes, resulting in performance degradation. Once the screws are damaged, the entire shell assembly must be replaced. The steel ring sealing and locking used in the present invention will not have such problems. It is durable and reliable without any quality issues. Moreover, the steel ring can be replaced, and the maintenance cost is low.

[0057] Please continue to refer to Figure 1 In this embodiment, the outer diameter of the junction box 7 is the same as that of the heating chamber housing 1. The junction box 7 is mounted on the outlet end of the heating chamber housing 1 and secured to the heating chamber housing 1 with screws. A sealing cover 21 is provided at the end of the junction box 7. The wiring of the heating tube 2 is integrated within the junction box 7, ensuring the heater's aesthetics, facilitating maintenance, and effectively protecting exposed conduits. The outer wall of the heating chamber housing 1 is also provided with a mounting groove 23, which is suitable for various types of supports, such as T-shaped, L-shaped, and flange-shaped, meeting the installation requirements of different environments and providing high usability.

[0058] Although the above embodiments have been described in detail for the present invention, it should be understood by those skilled in the art that modifications or improvements can be made based on the contents disclosed in the present invention without departing from the spirit and scope of the present invention, and that these modifications and improvements are within the spirit and scope of the present invention.

Claims

1. An online heating device, characterized in that: include: A heating chamber shell, wherein a liquid inlet and a liquid outlet are respectively provided on both sides of the bottom of the heating chamber shell; a liquid inlet pipe, disposed inside the heating chamber housing, wherein the top of the liquid inlet pipe is in communication with the interior of the heating chamber housing, and the bottom of the liquid inlet pipe is in communication with the liquid inlet port; A heating tube is spirally arranged on the outside of the liquid inlet tube; the heating tube is provided with an inner and outer layer, the spiral direction and pitch of the inner and outer layers are the same, the outer surface of the heating tube is covered with a PFA tube, and nitrogen is filled between the heating tube and the PFA tube; The spiral blades are arranged on the inner wall of the heating chamber shell and are inserted into the flow gap between the upper and lower heating tubes along the height direction of the liquid inlet tube to separate the fluid space in a spiral manner and establish a fluid spiral channel; the heating tubes are surrounded by upper and lower double-layer spaced spirals, and the spiral blades are inserted between the upper and lower double-layer heating tubes.

2. The online heating device according to claim 1, characterized in that The heating tube is wound with a constant pitch spiral, or the heating tube is wound with a variable pitch spiral.

3. The online heating device according to claim 2, characterized in that One end of the PFA tube is sealed and connected to one end of the heating tube, and a sealing joint is provided between the other end of the PFA tube and the heating tube.

4. The online heating device according to claim 3, characterized in that The sealing joint is connected to a pressure monitor.

5. The online heating device according to claim 1, characterized in that The outer diameter of the spiral blade matches the inner diameter of the heating chamber shell, and the inner diameter of the spiral blade matches the outer diameter of the liquid inlet pipe, so that the spiral blade is fixed between the heating chamber shell and the liquid inlet pipe.

6. The online heating device according to claim 1, characterized in that The spiral blade is fixed to the inner wall of the heating chamber shell, and the inner diameter of the spiral blade is larger than the outer diameter of the cylinder formed by the outer heating tube along the liquid inlet tube, so that the spiral blade and the outer heating tube are in clearance fit.

7. The online heating device according to claim 1, characterized in that The heating chamber shell includes an upper shell and a lower shell. The liquid inlet pipe, the heating pipe, and the spiral blade are arranged in the upper shell. The liquid inlet and the liquid outlet are arranged on the lower shell. The lower shell and the upper shell are connected by a screw kit.

8. The online heating device according to claim 7, characterized in that: An upper circular platform is provided at the bottom of the upper shell extending outward, and a lower circular platform is provided at the top of the lower shell extending outward. The circumferences of the lower and upper circular platforms are both provided with U-shaped grooves for installing the screw kit, and a sealing O-ring is provided between the upper and lower circular platforms.

9. The online heating device according to claim 8, characterized in that: A first steel ring is fixedly installed on the upper end surface of the upper truncated cone, and a second steel ring is fixedly installed on the lower end surface of the lower truncated cone. A circular mounting hole is provided at a position of the first steel ring corresponding to the U-shaped groove, and a threaded mounting hole is provided at a position of the second steel ring corresponding to the U-shaped groove. The threads of the threaded mounting hole match the screw kit.

10. The online heating device according to claim 8, characterized in that A protective cover shell is arranged around the connection between the upper shell and the lower shell, and the protective cover shell includes a first shield and a second shield. The longitudinal cross-sections of the first shield and the second shield are both L-shaped. The first shield is installed on the lower shell, and the second shield is snap-connected to the first shield.

11. The online heating device according to claim 1, characterized in that: It also includes a junction box, which is arranged at the bottom of the heating chamber shell. The outer diameter of the junction box is the same as the outer diameter of the heating chamber shell. The junction box is installed at the outlet end of the heating chamber shell and is fixed to the heating chamber shell by screws. A sealing cover is provided at the end of the junction box.

12. The online heating device according to claim 1, characterized in that: A temperature sensor is provided at the liquid outlet.

13. The online heating device according to claim 1, characterized in that: The outside of the heating chamber shell is provided with a mounting groove, which is suitable for the installation and fixation of T-shaped, L-shaped and flange-shaped supports.

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