Safe explosion-proof electric heater
By setting a different-directional moving stirring assembly and a three-layer protective structure inside the explosion-proof heater shell, the existing explosion-proof heaters have insufficient explosion-proof capabilities and uneven heating in flammable and explosive environments, and efficient heating and powerful explosion-proof performance are achieved.
Patent Information
- Application Number
- CN202421732396.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-22
- Publication Date
- 2025-05-23
- Estimated Expiration
- 2034-07-22
AI Technical Summary
When the existing explosion-proof heaters are used in flammable and explosive gas environments, the shell structure is single, making it difficult to effectively prevent explosions. The single stirring direction leads to uneven heating and insufficient mixing components.
A safety explosion-proof electric heater is designed, adopting a three-layer protective structure, including a built-in explosion-proof layer, a central insulation layer and an external protective layer. A redirectional moving agitator component is installed inside the shell. The drive shaft is driven by the agitator motor to drive the stirring blades to move in a different direction, achieving uniform stirring of the heating medium.
By moving the agitator assembly in a direction, the heating speed and mixing uniformity are improved, and the temperature difference and explosion risk are reduced; the three-layer protective structure significantly enhances the explosion-proof capability of the electric heater and ensures the overall safety performance of the equipment.
Smart Images
Figure CN222895321U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electric heaters, in particular to a safe explosion-proof electric heater. Background Art
[0002] An explosion-proof heater is a device used for heating in hazardous environments. Its main feature is that it has explosion-proof performance and can be safely used in flammable and explosive gas environments. Its working principle is to convert electrical energy into thermal energy through electric heating elements to heat fluids or solids.
[0003] The existing patent application number is: 2021100073746, which discloses a safe explosion-proof thermal oil electric heater and a heating method thereof. The electric heating device is started, and the thermal oil in the shell is heated by using the heating tube. At the same time, the motor is started to drive the driving shaft to rotate, thereby driving multiple first stirring blades on the driving shaft to stir the thermal oil in the heating tube, so that the thermal oil between the heating tubes is evenly heated. The first driving bevel gear on the driving shaft is meshed with the first driven bevel gear, thereby driving the driven shaft to rotate, and the second driven bevel gear is meshed with the second driving bevel gear, driving the rotating shaft to rotate, so that the second stirring blades stir the heating tube and the shell. The heat transfer oil between the inner walls is stirred, so that the heat transfer oil between the heating tube and the inner wall of the shell is evenly heated, avoiding the situation where the heat transfer oil is heated unevenly; when the heater is in operation, the internal liquid is stirred to ensure uniform heating, thereby preventing the danger caused by the temperature difference caused by uneven heating. However, when the above heater stirs the liquid, the stirring direction is single, resulting in insufficient mixing uniformity and slow speed. At the same time, the internal structure of the heater shell is relatively simple, which is only a simple single-layer protective layer. When encountering the danger of explosion, it is difficult to effectively prevent the occurrence of explosion, resulting in the generation of danger;
[0004] Therefore, in view of the above-mentioned problems, the present technical solution proposes a safe explosion-proof electric heater. Utility Model Content
[0005] The purpose of the utility model is to provide a safe explosion-proof electric heater to solve the problems raised in the above background technology.
[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a safe explosion-proof electric heater, comprising an electric heater shell, a heating medium inlet, and a heating medium outlet; the heating medium inlet and the heating medium outlet are respectively connected and arranged at the upper and lower ends of the electric heater shell, one end of the electric heater shell is provided with an electric heating element for heating the heating medium input into the electric heater shell, a stirring motor box is installed at the end of the electric heater shell on the side opposite to the electric heating element, a stirring motor is arranged inside the stirring motor box, an output end of the stirring motor is connected to a driving shaft that movably passes through the end wall of the electric heater shell and extends to the inner wall of the electric heater shell, and an end of the driving shaft is connected to an anisotropic moving stirring component arranged inside the electric heater shell, that is, under the drive of the stirring motor, the anisotropic moving stirring is controlled The heating medium inside the electric heater shell is stirred and heated to ensure that the heating medium is evenly heated. A three-layer protection structure is arranged from the inside to the outside in the shell wall of the electric heater shell, including a built-in explosion-proof layer, a middle insulation layer, and an external protection layer. The built-in explosion-proof layer is made of an explosion-proof plate made of explosion-proof material, which is used to first contact the explosion impact force generated inside the electric heater shell to suppress and protect it. The middle insulation layer is used to prevent the temperature inside the electric heater shell from transmitting outward. The external protection layer is made of high temperature resistant and corrosion-resistant metal material, and is used for the last step of explosion-proof impact protection, that is, under the action of the external protection layer, the middle insulation layer, the built-in explosion-proof layer and the anisotropic moving stirring component inside the electric heater shell, the overall explosion-proof capability of the electric heater shell is fully improved.
[0007] Compared with the prior art, the beneficial effects of the utility model are: by arranging an asymmetric moving stirring component inside the electric heater shell, the heating medium inside the electric heater shell is stirred quickly and efficiently, the temperature difference at different positions is reduced, and the heating speed is fully improved. At the same time, an external protective layer, a middle insulation layer, and a built-in explosion-proof layer are arranged inside the electric heater shell to enhance the explosion-proof strength inside the electric heater shell and fully ensure the overall safety performance of the electric heater. BRIEF DESCRIPTION OF THE DRAWINGS
[0008] Figure 1 The main view of the internal structure of a safety explosion-proof electric heater is shown in the figure.
[0009] Figure 2 for Figure 1 Schematic diagram of the enlarged structure of A.
[0010] Figure 3 The diagram is a partial structural diagram of a stirring assembly in a safety explosion-proof electric heater.
[0011] Figure 4 The figure is a schematic diagram of the internal structure of an electric heater shell in a safety explosion-proof electric heater.
[0012] Among them: electric heater housing 10, heating medium inlet 11, heating medium outlet 12, stirring motor box 14, stirring motor 15, screw 16, connecting block 17, nut 18, mounting ring 19, rotating shaft 20, stirring blade 21, rotating column 22, rotating hole 23, external protective layer 24, middle heat insulation layer 25, built-in explosion-proof layer 26, explosion-proof breathing valve 27, buffer layer 28, hollow layer 29. DETAILED DESCRIPTION
[0013] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.
[0014] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model 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 a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.
[0015] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be 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 it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.
[0016] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.
[0017] See also Figure 1A safety explosion-proof electric heater comprises an electric heater housing 10, a heating medium inlet 11, and a heating medium outlet 12; the heating medium inlet 11 and the heating medium outlet 12 are respectively connected and arranged at the upper and lower ends of the electric heater housing 10, one end of the electric heater housing 10 is provided with an electric heating element for heating the heating medium input into the electric heater housing 10, a stirring motor box 14 is installed at the end of the electric heater housing 10 opposite to the electric heating element, a stirring motor 15 is arranged inside the stirring motor box 14, an output end of the stirring motor 15 is connected to a driving shaft that movably passes through the end wall of the electric heater housing 10 and extends to the inner wall of the electric heater housing 10, and an end of the driving shaft is connected to an anisotropic moving stirring component arranged inside the electric heater housing 10, that is, under the drive of the stirring motor 15, the anisotropic moving stirring is controlled The heating medium inside the electric heater housing 10 is stirred and heated to ensure that the heating medium is evenly heated. A three-layer protective structure is arranged from the inside to the outside in the shell wall of the electric heater housing 10, including a built-in explosion-proof layer 26, a middle insulation layer 25, and an external protective layer 24. The built-in explosion-proof layer 26 is internally provided with an explosion-proof plate made of explosion-proof material, which is used to first contact with the explosion impact force generated inside the electric heater housing 10 to suppress and protect it. The middle insulation layer 25 is used to prevent the temperature inside the electric heater housing 10 from transmitting outward. The external protective layer 24 is made of high temperature resistant and corrosion-resistant metal material, and is used for the last step of explosion-proof impact protection, that is, under the action of the external protective layer 24, the middle insulation layer 25, the built-in explosion-proof layer 26 and the anisotropic moving stirring component inside the electric heater housing 10, the overall explosion-proof capability of the electric heater housing 10 is fully improved.
[0018] In the embodiment of the present invention, the heating medium inlet 11, the heating medium outlet 12, the stirring motor box 14, and the electric heating element and the electric heater housing 10 are all installed by seamless welding to maintain the integrated structural strength of the electric heater housing 10 and to increase the explosion-proof performance of the electric heater housing 10 to a certain extent; stainless steel or cast iron is generally selected as the metal material in the external protective layer 24, and it is set as a closed structure and distributed on the outermost side of the electric heater housing 10 to ensure that the outside of the electric heater housing 10 has sufficient pressure resistance and explosion-proof performance, and an anti-static coating is applied on the outside of the external protective layer 24 to avoid explosion caused by static electricity accumulation;
[0019] See also Figure 4 The middle heat-insulating layer 25 includes a hollow layer 29 in the middle, which can play a role of heat insulation and insulation. At the same time, a buffer layer 28 is arranged between the hollow layer 29 and the external protective layer 24 and the internal explosion-proof layer 26 on the corresponding side. The buffering property of the buffer layer 28 is utilized to increase the overall buffering protection strength inside the electric heater housing 10, ensuring that the layers can achieve corresponding functions while ensuring normal contact with each other.
[0020] In one embodiment of the present invention, see Figure 1 , Figure 3 The asymmetric moving stirring assembly includes two lead screws 16 fixedly connected by a connecting block 17, the lead screws 16 are rotatably arranged in the middle of the electric heater housing 10, one group of lead screws 16 is fixedly connected to the driving shaft of the stirring motor 15 at the end away from the connecting block 17, and the other group of lead screws 16 is rotatably connected to the inner wall of the electric heater housing 10 at the end away from the connecting block 17, and the two groups of lead screws 16 are threadedly connected with nuts 18, and a circular mounting ring 19 is fixedly installed on the outer side of the nut 18. A plurality of rotating shafts 20 are rotatably arranged in an annular manner at equal intervals on the circumferential outer wall of the mounting ring 19, and a stirring blade 21 is installed on the circumferential outer wall of the rotating shaft 20. A guide device for limiting its self-rotation is provided on the nut 18, that is, when the stirring motor 15 is started, the lead screw 16 is driven to rotate under the connection of the driving shaft. The screw 16 is rotated to drive the nut 18 thereon to move back and forth along its axis, and then the difference in the tooth groove direction is used to control the two sets of nuts 18 to move continuously in opposite directions, and then the stirring blade 21 on the rotating shaft 20 is driven to move along the inside of the electric heater housing 10. When the stirring blade 21 contacts the heating medium, it encounters resistance and rotates at this time. Then the movement of the nut 18 is used to protect the stirring blade 21 to continuously stir the heating medium it contacts, and quickly transfer the heat energy formed by the electric heating element along the heating medium inside the electric heater housing 10, thereby increasing the heating speed in turn and reducing the temperature difference at different positions inside the electric heater housing 10, thereby reducing the risk of explosion to a certain extent.
[0021] As a preferred embodiment of the present invention, refer to Figure 2 A rotating column 22 is installed at the end of the rotating shaft 20 facing the mounting ring 19. A rotating hole 23 is opened on the rotating column 22 corresponding to the mounting ring 19. The rotating column 22 is placed in the rotating hole 23 for limited rotation, that is, when subjected to liquid resistance, the rotating column 22 can be stably placed in the rotating hole 23 and rotated.
[0022] An explosion-proof breathing valve 27 is provided on the electric heater housing 10. When the electric heater housing 10 operates normally, the explosion-proof breathing valve 27 can slowly discharge or inhale air to balance the pressure difference inside and outside the equipment. When an explosion occurs, the explosion-proof breathing valve 27 can open quickly to quickly release the internal high pressure to prevent the housing from being damaged by excessive pressure.
[0023] The working principle of the utility model is: in the idle position of the device, all the driving parts mentioned above, which refer to the power elements, electrical components and the adapted power supply, are connected through wires, and the electrical connection is completed in a sequential working order between the electrical components. The detailed connection means are well-known technologies in the art. The following mainly introduces the working principle and process, and does not explain the electrical control. When in use, the heating medium is input into the interior of the electric heater housing 10 along the heating medium inlet 11, and then the operation of the electric heating element is controlled to heat the heating medium, and then the stirring motor 15 is synchronously started to drive the two sets of lead screws 16 to rotate Then, under the movement of the nut 18, the mounting rings 19 on both sides are controlled to move laterally in opposite directions along the inside of the electric heater housing 10, and then, under the rotation connection of the rotating shaft 20 placed in the mounting ring 19, the stirring blade 21 is controlled to rotate, and the heating medium is continuously stirred, and the heat generated by the electric heating element is quickly transferred inside the electric heater housing 10, thereby accelerating the heating speed and reducing the explosion caused by the temperature difference. At the same time, the protection of the external protective layer 24, the middle insulation layer 25, and the built-in explosion-proof layer 26 inside the electric heater housing 10 is utilized to further improve the overall anti-riot capability of the electric heater housing 10.
[0024] The above describes in detail the preferred implementation of this patent, but this patent is not limited to the above implementation. Various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of this patent.
Claims
1. A safe explosion-proof electric heater, characterized in that: The invention comprises an electric heater housing (10), a heating medium inlet (11), and a heating medium outlet (12); the heating medium inlet (11) and the heating medium outlet (12) are respectively connected and arranged at the upper and lower ends of the electric heater housing (10); an electric heating element is arranged at one end of the electric heater housing (10); a stirring motor box (14) is installed at the end of the electric heater housing (10) opposite to the electric heating element; a stirring motor (15) is arranged inside the stirring motor box (14); and an active wear-resistant material is connected to the output end of the stirring motor (15). A drive shaft extends from the end wall of the electric heater housing (10) to the inner wall of the electric heater housing (10), and the end of the drive shaft is connected to an agitator component arranged inside the electric heater housing (10). A three-layer protective structure is arranged in the shell wall of the electric heater housing (10) from the inside to the outside, including an internal explosion-proof layer (26), a middle heat insulation layer (25), and an external protective layer (24). The internal part of the internal explosion-proof layer (26) is made of an explosion-proof plate made of explosion-proof material, and the external protective layer (24) is made of a high-temperature resistant and corrosion-resistant metal material.
2. A safety explosion-proof electric heater according to claim 1, characterized in that: The heating medium inlet (11), the heating medium outlet (12), the stirring motor box (14), the electric heating element and the electric heater housing (10) are all seamlessly welded.
3. A safety explosion-proof electric heater according to claim 2, characterized in that: The metal material in the external protective layer (24) is selected from stainless steel or cast iron, and the outer side of the external protective layer (24) is coated with an antistatic coating.
4. A safety explosion-proof electric heater according to claim 3, characterized in that: The middle heat insulation layer (25) includes a hollow layer (29) located in the middle, and a buffer layer (28) is arranged between the hollow layer (29) and the external protective layer (24) and the internal explosion-proof layer (26) on the corresponding side.
5. A safety explosion-proof electric heater according to claim 4, characterized in that: The asymmetric moving stirring assembly comprises two lead screws (16) fixedly connected by a connecting block (17), the lead screws (16) being rotatably arranged in the middle of the electric heater housing (10), wherein the end of one group of lead screws (16) away from the connecting block (17) is fixedly connected to the driving shaft of the stirring motor (15), and the end of the other group of lead screws (16) away from the connecting block (17) is rotatably connected to the inner wall of the electric heater housing (10), the two groups of lead screws (16) are both threadedly connected with nuts (18), the outer side of the nut (18) is fixedly mounted with a mounting ring (19) of a circular structure, a plurality of rotating shafts (20) are rotatably arranged at equal intervals on the circumferential outer wall of the mounting ring (19), the circumferential outer wall of the rotating shaft (20) is mounted with a stirring blade (21), the nut (18) is provided with a guide device for limiting its self-rotation, and the tooth groove directions of the two groups of lead screws (16) are arranged in opposite directions.
6. A safety explosion-proof electric heater according to claim 5, characterized in that: A rotating column (22) is installed at the end of the rotating shaft (20) facing the mounting ring (19); a rotating hole (23) is provided on the rotating column (22) corresponding to the mounting ring (19); and the rotating column (22) is placed in the rotating hole (23) for limited rotation.
7. A safety explosion-proof electric heater according to claim 6, characterized in that: An explosion-proof breathing valve (27) is provided on the electric heater housing (10).