High-temperature-resistant and high-pressure-resistant fluid electric heater

Abstract

The utility model discloses a fluid electric heater resistant to high temperature and high pressure, which relates to the technical field of fluid electric heaters, and comprises a shell, a cavity is arranged in the shell, pure water is filled in the cavity, one end part of the shell is fixedly connected with a connecting flange, one end part of the connecting flange is fixedly connected with a sealing plate through a bolt, and the other end part of the connecting flange is fixedly connected with the sealing plate through a bolt. And a liquid level sensor is fixedly installed at the top of the sealing plate, an electric heating pipe is fixedly installed in the middle of the sealing plate, a liquid inlet pipe penetrates through one side of the top end of the shell, and an annular pipe is fixedly connected to the bottom end of the liquid inlet pipe. According to the utility model, a series of structures are arranged, so that the condition of dry burning of the electric heater caused by forgetting the operation sequence can be avoided, the operation of a user is more convenient, irreversible damage to the outer wall of the heating pipe caused by low-temperature fluid with high corrosivity and viscidity is reduced, and the service life of the electric heater is prolonged. Therefore, adverse effects on the service life of the electric heater are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of fluid electric heaters, in particular to a high-temperature and high-pressure resistant fluid electric heater. Background Art

[0002] A fluid electric heater is a device that converts electrical energy into thermal energy to heat the material to be heated. It is mainly suitable for low-temperature fluid media, so that the low-temperature fluid media can be converted into high-temperature media that meet process requirements.

[0003] Before using existing fluid electric heaters, in order to avoid dry burning, it is usually necessary to first pass low-temperature fluid into the interior of the heater and completely immerse the heating tube before turning on the heater for heating. However, this operation method is still prone to dry burning of the heater due to forgetting the operating sequence, which is inconvenient for users to operate. In addition, most of the existing low-temperature fluids directly contact the outer wall of the heating tube of the electric heater during heating. When encountering corrosive or viscous fluids, it is easy to cause irreversible damage to the outer wall of the heating tube, which affects the service life of the electric heater. Utility Model Content

[0004] The purpose of the present utility model is to provide a high temperature and high pressure resistant fluid electric heater to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-temperature and high-pressure fluid electric heater, comprising a shell, a cavity is provided inside the shell, the interior of the cavity is filled with pure water, one end of the shell is fixedly connected to a connecting flange, one end of the connecting flange is fixedly connected to a sealing plate by bolts, a liquid level sensor is fixedly installed on the top of the sealing plate, an electric heating tube is fixedly installed in the middle of the sealing plate, a liquid inlet pipe is passed through one side of the top of the shell, the bottom end of the liquid inlet pipe is fixedly connected to an annular tube, the end of the annular tube is fixedly connected to a liquid outlet pipe, and a water inlet pipe is passed through the middle of the top of the shell.

[0006] Preferably, a first solenoid valve is installed in the middle of the water inlet pipe, and the first solenoid valve is electrically connected to the liquid level sensor.

[0007] Preferably, a second solenoid valve is installed on the top of the liquid inlet pipe, an air blowing pipe is passed through a side wall in the middle of the liquid inlet pipe, and a third solenoid valve is installed at the junction of the air blowing pipe and the liquid inlet pipe.

[0008] Preferably, a high-pressure air pump is fixedly mounted on one end of the housing away from the connecting flange, and the output end of the high-pressure air pump is sleeve-connected to the bottom end of the blowing pipe.

[0009] Preferably, a drain pipe passes through the bottom end of the shell, and a fourth solenoid valve is fixedly installed in the middle of the drain pipe.

[0010] Preferably, the annular tube is connected to the electric heating tube in a sleeve manner, and the annular tube is communicated with the interior of the liquid inlet pipe and the liquid outlet pipe respectively.

[0011] Preferably, the annular tube and the electric heating tube are both movably connected to the pure water.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. This high-temperature and high-pressure fluid electric heater uses a water inlet pipe, a cavity, pure water, and a liquid level sensor to allow the interior of the fluid heater to be filled with liquid before the low-temperature fluid enters. The liquid can also keep the heating tube of the electric heater submerged, so that the operating sequence of the electric heater can be ignored, avoiding the dry burning of the electric heater due to forgetting the operating sequence, making it easier for users to operate.

[0014] 2. This high-temperature and high-pressure fluid electric heater, through the liquid inlet pipe, annular pipe and liquid outlet pipe, allows the low-temperature fluid to flow along the pipeline path formed by the liquid inlet pipe, the annular pipe and the liquid outlet pipe when entering the interior of the electric heater, so that the low-temperature fluid does not directly contact the outer wall of the heating tube of the electric heater, reducing the irreversible damage to the outer wall of the heating tube caused by the corrosive and viscous low-temperature fluid, thereby reducing the adverse effects on the service life of the electric heater. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the cavity and pure water structure of the utility model;

[0017] Figure 3 This is a schematic structural diagram of the annular tube and liquid inlet pipe of the utility model;

[0018] Figure 4 This is a schematic diagram of the water inlet pipe and air blowing pipe structure of the utility model.

[0019] In the figure: 1. Outer casing; 2. Liquid outlet pipe; 3. Water inlet pipe; 4. First solenoid valve; 5. Liquid inlet pipe; 6. Second solenoid valve; 7. Third solenoid valve; 8. Air blow pipe; 9. High-pressure air pump; 10. Drain pipe; 11. Fourth solenoid valve; 12. Liquid level sensor; 13. Electric heating tube; 14. Pure water; 15. Ring tube; 16. Cavity; 17. Connecting flange; 18. Sealing plate. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc. should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0023] like Figures 1 to 4 As shown, the high-temperature and high-pressure fluid electric heater of this embodiment includes a shell 1, a cavity 16 is opened inside the shell 1, the interior of the cavity 16 is filled with pure water 14, one end of the shell 1 is fixedly connected to a connecting flange 17, one end of the connecting flange 17 is fixedly connected to a sealing plate 18 by bolts, a liquid level sensor 12 is fixedly installed on the top of the sealing plate 18, an electric heating tube 13 is fixedly installed in the middle of the sealing plate 18, a liquid inlet pipe 5 is passed through one side of the top of the shell 1, the bottom end of the liquid inlet pipe 5 is fixedly connected to an annular tube 15, the end of the annular tube 15 is fixedly connected to the liquid outlet pipe 2, and a water inlet pipe 3 is passed through the middle of the top of the shell 1.

[0024] Specifically, the shell 1 is also equipped with components for maintaining the normal operation of the fluid electric heater. At the same time, the shell 1 has good thermal insulation and sealing properties. Pure water 14 is used as a liquid medium to prevent dry burning. It is not easy to produce scale when heated. At the same time, it can surround the annular tube 15, so that the low-temperature fluid in the annular tube 15 can be continuously heated under the action of heat conduction, which is more conducive to improving the heating efficiency of the low-temperature fluid. A sealing ring is fixed at the intersection of the sealing plate 18 and the connecting flange 17, so that the pure water 14 in the cavity 16 is not easy to leak. The function of the liquid level sensor 12 is to monitor the pure water in the cavity 16. The water level of 14 can also be prevented from falling below the top of the electric heating tube 13, thereby preventing the electric heater from burning dry. The function of the liquid inlet pipe 5 is to introduce the low-temperature fluid into the annular tube 15 inside the electric heater. The function of the annular tube 15 is to allow the low-temperature fluid to flow around the outside of the electric heating tube 13. While avoiding direct contact between the low-temperature fluid and the outer wall of the electric heating tube 13, the low-temperature fluid can fully absorb the heat of the electric heating tube 13 and the pure water 14, thereby improving the heating effect of the fluid electric heater. The function of the water inlet pipe 3 is to replenish the pure water 14 into the cavity 16.

[0025] Furthermore, a first solenoid valve 4 is installed in the middle of the water inlet pipe 3, and the first solenoid valve 4 is electrically connected to the liquid level sensor 12. The liquid level sensor 12 sends a signal to the control system to open the first solenoid valve 4, prompting pure water 14 to flow into the water inlet pipe 3 and replenish the cavity 16, thereby ensuring that there is enough pure water 14 in the cavity 16 for heating, reducing the probability of dry burning of the electric heater.

[0026] Furthermore, a second solenoid valve 6 is installed on the top of the liquid inlet pipe 5, and an air blowing pipe 8 is passed through one side wall in the middle of the liquid inlet pipe 5. A third solenoid valve 7 is installed at the junction of the air blowing pipe 8 and the liquid inlet pipe 5. The second solenoid valve 6 can control the flow rate of the incoming low-temperature fluid under the action of the control system, thereby facilitating maintaining the flow rate of the low-temperature fluid in the electric heater. The third solenoid valve 7 can control the connection and closing of the air blowing pipe 8 and the liquid inlet pipe 5.

[0027] Furthermore, a high-pressure air pump 9 is fixedly installed at one end of the outer shell 1 away from the connecting flange 17, and the output end of the high-pressure air pump 9 is connected to the bottom end of the blowing pipe 8. The high-pressure air pump 9 blows a high-speed airflow into the blowing pipe 8, so that the low-temperature fluid remaining in the annular tube 15 after heating can be quickly discharged from the liquid outlet pipe 2, thereby reducing the residual low-temperature fluid in the annular tube 15.

[0028] Furthermore, a drain pipe 10 is passed through the bottom end of the shell 1 , and a fourth solenoid valve 11 is fixedly installed in the middle of the drain pipe 10 . The function of the drain pipe 10 is to facilitate the discharge of the pure water 14 in the cavity 16 and the cleaning of the cavity 16 .

[0029] Furthermore, the annular tube 15 is connected to the electric heating tube 13 in a sleeve manner. The annular tube 15 is respectively connected to the interior of the liquid inlet tube 5 and the liquid outlet tube 2. The annular tube 15 surrounds the outside of the electric heating tube 13, so that heat can enter the annular tube 15 through heat conduction and radiation, thereby heating the low-temperature fluid in the annular tube 15.

[0030] Furthermore, the annular tube 15 and the electric heating tube 13 are both movably connected to the pure water 14, and the annular tube 15 can be immersed in the pure water 14, so that the heated pure water 14 can also transfer heat to the low-temperature fluid in the annular tube 15, thereby helping to speed up the heating speed of the low-temperature fluid.

[0031] The method of using this embodiment is as follows: before using the high-temperature and high-pressure fluid electric heater, it is necessary to first connect the liquid inlet pipe 5 to the container filled with pure water 14, and then connect the electric heater to an external power supply. At this time, the liquid level sensor 12 will send a signal to the control system to open the first solenoid valve 4, so that the water inlet pipe 3 starts to input pure water 14 into the cavity 16. When the pure water 14 reaches the set liquid level, the first solenoid valve 4 will be closed, and the electric heating tube 13 will be opened at the same time. At this time, the electric heating tube 13 starts to heat the pure water 14 in the cavity 16, and then the second solenoid valve 6 can be opened to allow the low-temperature fluid to enter the annular tube 15 through the liquid inlet pipe 5, and then It flows along the annular tube 15 around the electric heating tube 13 and is then discharged from the liquid outlet pipe 2. When it is necessary to clear the residual fluid in the annular tube 15, it is necessary to close the second solenoid valve 6, open the third solenoid valve 7, and start the high-pressure air pump 9 at the same time, so that the high-pressure air pump 9 sends the high-pressure airflow into the liquid inlet pipe 5 through the blowing pipe 8, so that the airflow enters the annular tube 15 through the liquid inlet pipe 5, and blows the low-temperature fluid remaining in the annular tube 15 to the pipe mouth of the liquid outlet pipe 2. Before removing the electric heating tube 13 through the sealing plate 18, it is necessary to open the fourth solenoid valve 11 to drain the pure water 14 in the cavity 16, and then the sealing plate 18 and the electric heating tube 13 can be opened and removed.

[0032] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A high temperature and high pressure resistant fluid electric heater, comprising a housing (1), characterized in that: A cavity (16) is provided inside the shell (1), and the interior of the cavity (16) is filled with pure water (14). One end of the shell (1) is fixedly connected to a connecting flange (17), and one end of the connecting flange (17) is fixedly connected to a sealing plate (18) by bolts. A liquid level sensor (12) is fixedly installed on the top of the sealing plate (18), and an electric heating pipe (13) is fixedly installed in the middle of the sealing plate (18). A liquid inlet pipe (5) is passed through one side of the top of the shell (1), and the bottom end of the liquid inlet pipe (5) is fixedly connected to an annular pipe (15), and the end of the annular pipe (15) is fixedly connected to a liquid outlet pipe (2). A water inlet pipe (3) is passed through the middle of the top of the shell (1).

2. The high temperature and high pressure resistant fluid electric heater according to claim 1, characterized in that: A first electromagnetic valve (4) is installed in the middle of the water inlet pipe (3), and the first electromagnetic valve (4) is electrically connected to the liquid level sensor (12).

3. The high temperature and high pressure resistant fluid electric heater according to claim 1, characterized in that: A second electromagnetic valve (6) is installed on the top of the liquid inlet pipe (5), an air blowing pipe (8) is passed through a side wall in the middle of the liquid inlet pipe (5), and a third electromagnetic valve (7) is installed at the junction of the air blowing pipe (8) and the liquid inlet pipe (5).

4. The high temperature and high pressure resistant fluid electric heater according to claim 3, characterized in that: A high-pressure air pump (9) is fixedly mounted on one end of the housing (1) away from the connecting flange (17), and the output end of the high-pressure air pump (9) is sleeve-connected to the bottom end of the blowing pipe (8).

5. The high temperature and high pressure resistant fluid electric heater according to claim 1, characterized in that: A drainage pipe (10) passes through the bottom end of the housing (1), and a fourth solenoid valve (11) is fixedly installed in the middle of the drainage pipe (10).

6. The high temperature and high pressure resistant fluid electric heater according to claim 1, characterized in that: The annular tube (15) is sleeve-connected to the electric heating tube (13), and the annular tube (15) is respectively connected to the interior of the liquid inlet tube (5) and the liquid outlet tube (2).

7. The high temperature and high pressure resistant fluid electric heater according to claim 1, characterized in that: The annular tube (15) and the electric heating tube (13) are both movably connected to the pure water (14).

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