Conduction oil heating pipe of electric heater

Abstract

The utility model discloses a conduction oil heating pipe of an electric heater, which relates to the technical field of heating pipes of electric heaters and comprises a middle cylinder, the top end of the middle cylinder is fixedly connected with a sealing plate through screws, an air pump is fixedly mounted in the middle of the top end of the sealing plate, a sleeve penetrates through one side of the top end of the sealing plate, and a vertical column is arranged in the sleeve. A pressing plate is fixedly connected to the top end of the vertical column, a cavity is formed in the middle of the vertical column, a ball is movably embedded in the inner side of the cavity, an oil storage cavity is formed in the middle cylinder, a heating pipeline penetrates through the bottom end of the middle cylinder, and a temperature sensor is fixedly installed at the tail end of the heating pipeline. By arranging a series of structures, the coke can be loosened or fall off from the inner wall of the heating pipe, so that the difficulty of subsequently cleaning the coke on the inner wall of the heating pipe is reduced, the flow speed of heat-conducting oil in the heating pipe is adjusted, and the adverse effect of the heat-conducting oil on the heat exchange efficiency of the heating pipe is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electric heater heating tubes, in particular to a thermal oil heating tube of an electric heater. Background Art

[0002] Electric heater heating tubes are electrical components specifically used to convert electrical energy into thermal energy. They are usually made of a metal tube as the outer shell, with mostly spiral resistance wires inside. A small number of them use heat transfer media such as thermal oil to generate heat through heat exchange. They are mainly used to heat air, metal molds and various liquids.

[0003] However, when using the existing electric heater thermal oil type heating pipe, the heated thermal oil is usually introduced into the heating pipe, so that the high-temperature thermal oil passes through the outer wall of the pipe to heat the low-temperature fluid in contact with the outer wall of the pipe. However, after the thermal oil is heated for a long time inside the heating pipe, it is more likely to coke, which makes it difficult to clean the inner wall of the heating pipe. In addition, when heating the fluid medium, the existing thermal oil heating pipe cannot adjust the flow rate of the thermal oil in the heating pipe according to the temperature at the oil outlet of the heating pipe, which makes it easier for the thermal oil to be too low in temperature in the heating pipe, affecting the heat exchange efficiency of the heating pipe. Utility Model Content

[0004] The purpose of the utility model is to provide a thermal oil heating tube of an 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: an electric heater thermal oil heating tube, comprising a middle tube, the top of the middle tube is fixedly connected to a sealing plate by screws, an air pump is fixedly installed in the middle of the top of the sealing plate, a sleeve is passed through one side of the top of the sealing plate, a vertical column is provided inside the sleeve, the top of the vertical column is fixedly connected to a pressure plate, a cavity is provided in the middle of the vertical column, a ball is movably embedded in the inner side of the cavity, an oil storage cavity is provided inside the middle tube, a heating pipe is passed through the bottom end of the middle tube, a temperature sensor is fixedly installed at the end of the heating pipe, an oil inlet pipe is passed through one side wall of the middle tube, and a solenoid valve is installed at one end of the oil inlet pipe.

[0006] Preferably, a flange is fixedly connected to the top of the heating pipe, and the heating pipe is fixedly connected to the electric heater housing through the flange.

[0007] Preferably, the interior of the oil inlet pipe is communicated with the interior of the oil storage chamber, a pipe opening is provided at the intersection of the heating pipe and the oil storage chamber, and the oil storage chamber is communicated with the interior of the heating pipe through the pipe opening.

[0008] Preferably, the end of the heating pipe passes through the other side wall of the middle cylinder.

[0009] Preferably, a telescopic spring is provided on the top of the sleeve, the top end of the telescopic spring is fixedly connected to the bottom end of the pressure plate, and the bottom end of the telescopic spring is snap-connected to the top end of the sleeve.

[0010] Preferably, the telescopic spring is movably sleeved and connected to the vertical column, and the vertical column is movably inserted and connected to the sleeve through the telescopic spring.

[0011] Preferably, the ball is movably connected to the sleeve and the oil storage chamber through a cavity and a vertical column.

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

[0013] 1. The thermal oil heating tube of this electric heater is equipped with a sleeve, a pressure plate, a vertical column, a ball and an air pump. When the inside of the heating tube needs to be cleaned, the ball can be released into the oil storage cavity and enter the heating tube with the airflow generated by the air pump, so that the ball moves along the inner wall of the heating tube and collides with the coke on the inner wall, thereby facilitating the loosening or falling off of the coke from the inner wall of the heating tube, thereby reducing the difficulty of subsequent cleaning of the coke on the inner wall of the heating tube.

[0014] 2. The thermal oil heating tube of this electric heater uses a temperature sensor, an oil storage chamber and a solenoid valve so that when the thermal oil is introduced into the heating tube, the temperature sensor at the end of the heating tube can monitor the temperature of the oil flowing out of the heating tube. When the temperature of the thermal oil is too low, the controller can control the opening size of the solenoid valve and the blowing speed of the air pump to speed up the discharge of the thermal oil with too low temperature in the heating pipe, thereby adjusting the flow speed of the thermal oil in the heating tube and reducing the adverse effect of the thermal oil on the heat exchange efficiency of the heating tube. 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 oil storage chamber and temperature sensor structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the pipe mouth and middle tube structure of the utility model;

[0018] Figure 4 for Figure 2 A magnified view of the structure in the middle.

[0019] In the figure: 1. Air pump; 2. Sealing plate; 3. Middle cylinder; 4. Sleeve; 5. Oil inlet pipe; 6. Flange; 7. Heating pipe; 8. Oil storage chamber; 9. Temperature sensor; 10. Electric heater housing; 11. Pipe mouth; 12. Solenoid valve; 13. Pressure plate; 14. Telescopic spring; 15. Cavity; 16. Ball; 17. Vertical column. 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 thermal oil heating tube of the electric heater in this embodiment includes a middle tube 3, the top of the middle tube 3 is fixedly connected to the sealing plate 2 by screws, the middle part of the top of the sealing plate 2 is fixedly installed with an air pump 1, a sleeve 4 is passed through one side of the top of the sealing plate 2, a vertical column 17 is provided inside the sleeve 4, the top of the vertical column 17 is fixedly connected with a pressure plate 13, a cavity 15 is provided in the middle of the vertical column 17, a ball 16 is movably embedded in the inner side of the cavity 15, an oil storage cavity 8 is provided inside the middle tube 3, a heating pipe 7 is passed through the bottom end of the middle tube 3, a temperature sensor 9 is fixedly installed at the end of the heating pipe 7, an oil inlet pipe 5 is passed through one side wall of the middle tube 3, and a solenoid valve 12 is installed at one end of the oil inlet pipe 5.

[0024] Specifically, an opening is provided at the top of the middle cylinder 3 for opening the interior of the oil storage chamber 8 to facilitate cleaning the interior of the oil storage chamber 8. The function of the sealing plate 2 is to close the opening at the top of the middle cylinder 3 to maintain the sealing of the interior of the oil storage chamber 8. At the same time, the sealing plate 2 and the middle cylinder 3 are detachable structures, which is convenient for the disassembly and assembly of the air pump 1 and the subsequent maintenance and replacement. The output end of the air pump 1 is communicated with the interior of the oil storage chamber 8, thereby enabling compressed air to enter the oil storage chamber 8 and the heating pipe 7. The sleeve 4 and the sealing plate 2 are an integrated structure, and the inner diameter of the sleeve 4 is adapted to the outer diameter of the vertical column 17, so that the vertical column 17 can move up and down in the sleeve 4. The function of the pressing plate 13 is to increase the area of ​​the top of the vertical column 17 to facilitate pressing. One side wall of the cavity 15 is not closed, and the bottom of the cavity 15 is sloped. When the ball 16 in the cavity 15 slides down into the oil storage chamber 8, it can move along the cavity 15 The slope at the bottom slides into the oil storage chamber 8. The ball 16 is a solid metal ball with a rough surface and an outer diameter smaller than the inner diameter of the heating pipe 7, so that after the ball 16 enters the heating pipe 7 with the compressed air, it can have space to swing on the inner wall of the heating pipe 7, thereby achieving an impact on the coke formed on the inner wall of the heating pipe, which is conducive to the loosening and falling off of the coke on the inner wall of the heating pipe, and reducing the difficulty of subsequent cleaning of the inner wall of the heating pipe. The function of the oil storage chamber 8 is to allow the heat transfer oil to be temporarily retained in the oil storage chamber 8, and can be accelerated for the second time by the compressed air filled in by the air pump 1, thereby facilitating the rapid discharge of the heat transfer oil with too low temperature in the heating pipe. The pipe mouth 11 of the heating pipe 7 is the oil inlet end of the heat transfer oil, and the end equipped with the temperature sensor 9 is the oil outlet end. The temperature sensor 9 is connected to the solenoid valve 12 and the air pump 1 through the controller, so that the air pump 1 and the solenoid valve 12 can be controlled.

[0025] Furthermore, a flange 6 is fixedly connected to the top of the heating pipe 7, and the heating pipe 7 is fixedly connected to the electric heater shell 10 through the flange 6. Screw holes are opened at the outer edge of the flange 6, and the heating pipe 7 is connected to the electric heater shell through the flange 6.

[0026] Furthermore, the interior of the oil inlet pipe 5 is connected to the interior of the oil storage chamber 8, and a pipe opening 11 is provided at the junction of the heating pipe 7 and the oil storage chamber 8. The oil storage chamber 8 is connected to the interior of the heating pipe 7 through the pipe opening 11. The function of the pipe opening 11 is to allow the heat-conducting oil in the oil storage chamber 8 to smoothly enter the heating pipe, and at the same time allow the released ball 16 to enter the heating pipe, and also allow the compressed air filled by the air pump 1 to enter the heating pipe.

[0027] Furthermore, the end of the heating pipe 7 passes through the other side wall of the middle tube 3. The end of the heating pipe is the oil outlet end of the lubricating oil, so that the heat transfer oil that completes heat exchange in the heating pipe can be discharged from the heating pipe, which is beneficial for the subsequent high-temperature heat transfer oil to enter the interior of the heating pipe.

[0028] Furthermore, a telescopic spring 14 is provided at the top of the sleeve 4, the top of the telescopic spring 14 is fixedly connected to the bottom end of the pressure plate 13, and the bottom end of the telescopic spring 14 is engaged with the top of the sleeve 4. When the telescopic spring 14 is in the initial state, the cavity 15 and the ball 16 in the vertical column 17 are in the sleeve 4 and the sealing plate 2. When the telescopic spring 14 is compressed downward, the cavity 15 and the ball 16 will enter the oil storage cavity 8, so that the ball 16 can slide into the oil storage cavity 8 from the notch on one side of the cavity 15, thereby releasing the ball 16.

[0029] Furthermore, the telescopic spring 14 is movably connected to the vertical column 17, and the vertical column 17 is movably connected to the sleeve 4 through the telescopic spring 14. The function of the telescopic spring 14 is to control the position of the vertical column 17 through its own elastic deformation, so that the ball 16 and the cavity 15 in the vertical column 17 can be maintained inside the sleeve 4 when the vertical column 17 is not subjected to force.

[0030] Furthermore, the ball 16 is movably connected to the sleeve 4 and the oil storage chamber 8 through the cavity 15 and the vertical column 17. After the vertical column 17 is pressed down, the ball 16 will slide from the cavity 15 into the oil storage chamber 8, and then enter the heating pipe 7 through the only pipe opening 11 at the bottom of the oil storage chamber 8. The function of the ball 16 is to increase the impact on the coke on the inner wall of the heating pipe 7, thereby facilitating the loosening and falling off of the coke.

[0031] The method of using this embodiment is as follows: when using the thermal oil heating tube of the electric heater, it is necessary to first fix the heating tube to the outer shell of the electric heater through the flange 6, then the solenoid valve 12 will be opened, and the oil inlet pipe 5 will pass into the high-temperature thermal oil, and then the high-temperature thermal oil will enter the oil storage chamber 8, and then the thermal oil will enter the heating pipe 7 through the pipe mouth 11, so that the thermal oil enters the interior of the electric heater for heat exchange, and then the thermal oil that completes the heat exchange will be discharged from the end of the heating pipe 7. At this time, the temperature sensor 9 will monitor the temperature of the thermal oil in the discharge pipe. When the temperature of the thermal oil is lower than the set value, the temperature sensor 9 will send a signal to the controller, so that the controller starts the air pump 1 and at the same time makes the opening amplitude of the solenoid valve 12 at the oil inlet pipe 5 larger, so that the flow rate and flow rate of the high-temperature thermal oil are increased. , so that the heat-conducting oil with too low temperature in the heating pipe is quickly pushed to the end of the heating pipe 7. When the inside of the heating pipe 7 needs to be cleaned, compressed air needs to be introduced into the oil storage chamber 8 through the air pump 1 to drain the heat-conducting oil in the heating pipe 7. Then the pressure plate 13 can be pressed downward to drive the vertical column 17 and the telescopic spring 14 to press down, so that the telescopic spring 14 is compressed. When the cavity 15 enters the oil storage chamber 8, the ball 16 in the cavity 15 will slide into the oil storage chamber 8 along the slope surface and the notch of the side wall, and then enter the heating pipe 7 from the pipe mouth 11 with the compressed air, and move while shaking in the heating pipe 7, so that the coke formed on the inner wall of the heating pipe 7 is loosened and falls off. Finally, the coke falling off from the inner wall of the heating pipe 7 can be blown out from the end of the heating pipe 7 together with the compressed air and the ball 16.

[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 thermal oil heating tube for an electric heater, comprising a middle tube (3), characterized in that: The top of the middle cylinder (3) is fixedly connected to a sealing plate (2) by screws, and an air pump (1) is fixedly installed in the middle of the top of the sealing plate (2). A sleeve (4) is passed through one side of the top of the sealing plate (2), and a vertical column (17) is provided inside the sleeve (4). The top of the vertical column (17) is fixedly connected to a pressure plate (13), and a cavity (15) is provided in the middle of the vertical column (17). A ball (16) is movably embedded in the inner side of the cavity (15). An oil storage cavity (8) is provided inside the middle cylinder (3), and a heating pipe (7) is passed through the bottom end of the middle cylinder (3). A temperature sensor (9) is fixedly installed at the end of the heating pipe (7). An oil inlet pipe (5) is passed through one side wall of the middle cylinder (3), and a solenoid valve (12) is installed at one end of the oil inlet pipe (5).

2. The thermal oil heating tube of an electric heater according to claim 1, characterized in that: A flange (6) is fixedly connected to the top of the heating pipe (7), and the heating pipe (7) is fixedly connected to the electric heater housing (10) via the flange (6).

3. The thermal oil heating tube of an electric heater according to claim 1, characterized in that: The interior of the oil inlet pipe (5) is communicated with the interior of the oil storage chamber (8); a pipe opening (11) is provided at the intersection of the heating pipe (7) and the oil storage chamber (8); and the oil storage chamber (8) is communicated with the interior of the heating pipe (7) through the pipe opening (11).

4. The thermal oil heating tube of an electric heater according to claim 1, characterized in that: The end of the heating pipe (7) passes through the other side wall of the middle cylinder (3).

5. The thermal oil heating tube of an electric heater according to claim 1, characterized in that: A telescopic spring (14) is provided at the top of the sleeve (4), the top end of the telescopic spring (14) is fixedly connected to the bottom end of the pressure plate (13), and the bottom end of the telescopic spring (14) is snap-connected to the top end of the sleeve (4).

6. The thermal oil heating tube of an electric heater according to claim 5, characterized in that: The telescopic spring (14) is movably connected to the vertical column (17), and the vertical column (17) is movably connected to the sleeve (4) through the telescopic spring (14).

7. The thermal oil heating tube of an electric heater according to claim 1, characterized in that: The ball (16) is movably connected to the sleeve (4) and the oil storage chamber (8) through the cavity (15) and the vertical column (17).

Images