Tank-type explosion-proof electric heater

Abstract

The utility model relates to a tank type explosion-proof electric heater, which belongs to the technical field of electric heaters and comprises a heating tank body, a tubular electric heater main body, a first explosion-proof partition plate, a sealing tank cover, an electric heater cable and a high-temperature-resistant remote-transmission magnetic turning plate liquid level meter, and the heating tank body is provided with a second explosion-proof partition plate. According to the utility model, the U-shaped electric heating tube of the tubular electric heater main body is inserted into the heating tank cavity, the first anti-explosion partition plate and the second anti-explosion partition plate are connected, and the first anti-explosion partition plate and the second anti-explosion partition plate can be combined to separate the anti-explosion isolation cavity and the heating tank cavity, so that electric sparks can be physically isolated, and a steam permeation path can be blocked; the explosion propagation path is blocked through the cavity dividing design, nitrogen is introduced into the explosion-proof isolation cavity through the one-way air inlet valve, the junction box end and the wiring position of the tubular electric heater body can be sealed in the nitrogen inert environment, the inert environment eliminates the possibility of electric spark ignition, and the explosion risk caused by electric spark ignition is avoided. Therefore, the explosion-proof performance of the tank type electric heater can be further improved.

Description

Technical Field

[0001] This utility model relates to the field of electric heater technology, and in particular to a tank-type explosion-proof electric heater. Background Technology

[0002] Tank-type electric heaters can heat liquids. The heating element of the tank-type electric heater can convert electrical energy into heat energy and transfer heat to the liquid through direct or indirect contact. Multiple electric heating tubes are centrally installed and fixed on the tank wall or tank cover through flanges. The electric heating tube bundle is directly immersed in the liquid, thereby heating the liquid inside the tank.

[0003] Existing tank-type electric heaters have the following drawbacks: when heating flammable solvents, oils, or gaseous substances, flammable vapors evaporate from the tank opening. If the junction box is not isolated, electric sparks can ignite the evaporating or leaking flammable vapors. Therefore, this paper proposes a tank-type explosion-proof electric heater that physically isolates electric sparks, thus avoiding the risk of explosion. A compartmentalized design blocks the explosion propagation path, and an inert environment eliminates the possibility of ignition by electric sparks, further improving the explosion-proof performance of the tank-type electric heater. A level gauge is installed to detect the water level inside the explosion-proof electric heater, allowing operators to promptly shut off the heater or add liquid when the level is low, preventing dry burning. Utility Model Content

[0004] This invention provides a canister-type explosion-proof electric heater that solves the explosion risks caused by dry burning and electric sparks. It breaks through the traditional concept of overall explosion protection by enclosing the electrical joints of the hazardous source in an inert environment, thereby further improving the explosion-proof performance of the canister-type electric heater.

[0005] The solution to the above-mentioned technical problems of this utility model is as follows: A tank-type explosion-proof electric heater includes a heating tank, a tubular electric heater body, a first explosion-proof partition, a sealed tank cover, an electric heater cable, and a high-temperature resistant remote magnetic level gauge. The heating tank is equipped with a second explosion-proof partition, which separates an explosion-proof isolation chamber and a heating tank chamber. The tubular electric heater body is fixedly connected to the first explosion-proof partition. The tubular electric heater body is equipped with a U-shaped electric heating tube. An electric heating element penetrates the first explosion-proof partition, which is connected to the second explosion-proof partition by screws. The heating tank body is connected to the sealed tank cover by screws. The heating tank cavity is equipped with a discharge port, a feed port, and a rupture disc flange assembly. The wiring terminals of the tubular electric heater body are connected to the electric heater cable, which is equipped with a die-cast sealing joint. The explosion-proof isolation cavity is filled with inert gas. A high-temperature resistant remote magnetic level gauge is installed in the heating tank body to detect the liquid level in the heating tank cavity.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Furthermore, the connection between the No. 1 explosion-proof partition and the No. 2 explosion-proof partition is sealed with a high-temperature resistant sealing ring. The No. 1 explosion-proof partition and the No. 2 explosion-proof partition can be combined to separate the explosion-proof isolation chamber and the heating tank chamber. The U-shaped electric heating tube of the tubular electric heater body can be inserted into the heating tank chamber to heat the medium.

[0008] Furthermore, the connection between the heating tank and the sealing tank cover is sealed with a sealing ring, thereby ensuring the inert gas protective environment inside the explosion-proof isolation chamber.

[0009] Furthermore, the heating tank and the sealing tank cover are uniformly and fixedly installed with heat dissipation fins, which are laid in the explosion-proof isolation cavity area, thereby dissipating heat from the internal explosion-proof isolation cavity.

[0010] Furthermore, the heating tank cavity is provided with an alumina ceramic insulation layer, and the explosion-proof isolation cavity is fixedly connected to a one-way air inlet valve and a one-way air outlet valve. The one-way air inlet valve and the one-way air outlet valve are threadedly connected with sealing caps. By opening the sealing caps, nitrogen gas can be introduced through the one-way air inlet valve, so that the explosion-proof isolation cavity can be filled with inert gas to achieve isolation protection.

[0011] Furthermore, the inner wall of the heating tank cavity is uniformly equipped with guide plates, which are staggered on the inner wall of the heating tank cavity, and the guide plates have through grooves corresponding to the U-shaped electric heating tubes.

[0012] Furthermore, the die-cast sealing joint is embedded with an alumina ceramic insulating ring, and the space between the electric heater cable and the insulating ring is filled with high-temperature sealant to prevent the inert gas from escaping.

[0013] Furthermore, the die-cast sealing joint is connected to the heating tank by screws, and the connection is sealed to prevent the inert gas from escaping.

[0014] This utility model provides a tank-type explosion-proof electric heater, which has the following advantages:

[0015] 1. Insert the U-shaped electric heating tube of the tubular electric heater body into the heating tank cavity, and then connect the No. 1 explosion-proof partition and the No. 2 explosion-proof partition. The No. 1 explosion-proof partition and the No. 2 explosion-proof partition can be combined to separate the explosion-proof isolation cavity and the heating tank cavity, thereby physically isolating electric sparks and blocking the vapor penetration path, thus avoiding the risk of explosion caused by them. The cavity design blocks the explosion propagation path.

[0016] 2. Nitrogen gas is introduced into the explosion-proof isolation chamber through a one-way inlet valve, so that the junction box end and wiring of the tubular electric heater body can be sealed in a nitrogen inert environment. The inert environment eliminates the possibility of ignition by electric sparks, thereby further improving the explosion-proof performance of the tank electric heater.

[0017] 3. The high-temperature resistant remote magnetic level gauge can detect the liquid level in the heating tank cavity. If the liquid level is lower than the U-shaped electric heating tube and dry burning occurs, the amount of medium entering the tank can be increased or the main body of the tubular electric heater can be stopped.

[0018] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it according to the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. The specific implementation methods of this utility model are given in detail in the following embodiments and their accompanying drawings. Attached Figure Description

[0019] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0020] Figure 1 This is a schematic diagram of the structure of a tank-type explosion-proof electric heater according to an embodiment of the present invention;

[0021] Figure 2 A front view of a tank-type explosion-proof electric heater provided in an embodiment of this utility model;

[0022] Figure 3 A side view of a tank-type explosion-proof electric heater provided in an embodiment of this utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the heating tank in a tank-type explosion-proof electric heater according to an embodiment of the present invention.

[0024] The attached diagram lists the components represented by each number as follows:

[0025] 1. Heating tank body; 2. Tubular electric heater body; 3. No. 1 explosion-proof baffle; 4. No. 2 explosion-proof baffle; 5. Explosion-proof isolation chamber; 6. Heating tank chamber; 7. U-shaped electric heating tube; 8. Sealed tank cover; 9. Heat dissipation fins; 10. Alumina ceramic insulation layer; 11. One-way air inlet valve; 12. One-way exhaust valve; 13. Discharge port; 14. Inlet port; 15. Rupture disc flange assembly; 16. Guide plate; 17. Electric heater cable; 18. Die-cast sealing joint; 19. High-temperature resistant remote magnetic level gauge. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1-4The principles and features of this utility model are described below. The examples given are for illustrative purposes only and are not intended to limit the scope of this utility model. The utility model is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of this utility model will become clearer from the following description and claims. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model.

[0027] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0029] like Figure 1-4 As shown, a tank-type explosion-proof electric heater includes a heating tank 1, a tubular electric heater body 2, a first explosion-proof partition 3, a sealed tank cover 8, an electric heater cable 17, and a high-temperature resistant remote-transmission magnetic level gauge 19. The heating tank 1 is equipped with a second explosion-proof partition 4, which separates the heating tank 1 into an explosion-proof isolation chamber 5 and a heating tank chamber 6. The tubular electric heater body 2 is fixedly connected to the first explosion-proof partition 3. The tubular electric heater body 2 is equipped with a U-shaped electric heating tube 7, which passes through the first explosion-proof partition 3. Explosion-proof partition 3, explosion-proof partition 3 and explosion-proof partition 4 are connected by screws. Heating tank 1 is connected to sealing tank cover 8 by screws. Heating tank cavity 6 is provided with discharge port 13, inlet port 14 and rupture disc flange assembly 15. The wiring terminal of tubular electric heater body 2 is connected to electric heater cable 17. Electric heater cable 17 is equipped with die-cast sealing joint 18. Explosion-proof isolation cavity 5 is filled with inert gas. High temperature resistant remote magnetic level gauge 19 is installed on heating tank 1 to detect the level in heating tank cavity 6.

[0030] Preferably, the connection between the No. 1 explosion-proof partition 3 and the No. 2 explosion-proof partition 4 is sealed with a high-temperature resistant sealing ring. The No. 1 explosion-proof partition 3 and the No. 2 explosion-proof partition 4 can be combined to separate the explosion-proof isolation chamber 5 and the heating tank chamber 6. The U-shaped electric heating tube 7 of the tubular electric heater body 2 can be inserted into the heating tank chamber 6 to heat the medium.

[0031] Preferably, the connection between the heating tank 1 and the sealing tank cover 8 is sealed with a sealing ring, thereby ensuring the inert gas protection environment inside the explosion-proof isolation chamber 5.

[0032] Preferably, the heating tank 1 and the sealing tank cover 8 are uniformly and fixedly installed with heat dissipation fins 9, which are laid in the area of ​​the explosion-proof isolation cavity 5, so as to dissipate heat from the internal explosion-proof isolation cavity 5.

[0033] Preferably, the heating tank cavity 6 is provided with an alumina ceramic insulation layer 10, and the explosion-proof isolation cavity 5 is fixedly connected to a one-way air inlet valve 11 and a one-way air outlet valve 12. The one-way air inlet valve 11 and the one-way air outlet valve 12 are threadedly connected with sealing caps. When the sealing caps are opened, nitrogen gas can be introduced through the one-way air inlet valve 11, so that the explosion-proof isolation cavity 5 can be filled with inert gas to achieve isolation protection.

[0034] Preferably, guide plates 16 are evenly installed on the inner wall of the heating tank cavity 6. The guide plates 16 are staggered on the inner wall of the heating tank cavity 6, and the guide plates 16 have through grooves corresponding to the U-shaped electric heating tubes 7.

[0035] Preferably, the die-cast sealing joint 18 has an embedded alumina ceramic insulating ring, and the space between the electric heater cable 17 and the insulating ring is filled with high-temperature sealant to prevent the inert gas from escaping.

[0036] Preferably, the die-cast sealing joint 18 is connected to the heating tank 1 by screws, and the connection is sealed to prevent the inert gas from escaping.

[0037] The specific working principle and usage method of this utility model are as follows: Insert the U-shaped electric heating tube 7 of the tubular electric heater body 2 into the heating tank cavity 6, then connect the first explosion-proof partition 3 and the second explosion-proof partition 4 to complete the assembly of the tubular electric heater body 2. Connect the die-cast sealing joint 18 to the heating tank 1, and connect the electric heater cable 17 to the tubular electric heater body 2. After the connection is completed, connect the sealing tank cover 8 to the heating tank 1 so that the explosion-proof isolation cavity 5 can be sealed. Unscrew the sealing caps of the one-way inlet valve 11 and the one-way exhaust valve 12, and let nitrogen gas enter the explosion-proof isolation cavity 5 through the one-way inlet valve 11. This allows the junction box end and wiring end of the tubular electric heater body 2 to be placed in the nitrogen-sealed environment of the explosion-proof isolation cavity 5, thereby effectively preventing the risk of explosion caused by electric sparks and further improving the explosion-proof performance.

[0038] The heating medium is introduced through the outlet 13 and then discharged through the inlet 14. The U-shaped electric heating tube 7 can heat the introduced medium. The high-temperature resistant remote magnetic float level gauge 19 can detect the liquid level in the heating tank cavity. If the liquid level is lower than the U-shaped electric heating tube 7, dry burning can occur. The amount of liquid entering the medium can be increased or the main body of the 2-tube electric heater can be stopped.

[0039] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the above description. However, any modifications, alterations, or variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.

Claims

1. A tank-type explosion-proof electric heater, comprising a heating tank (1), a tubular electric heater body (2), a first explosion-proof partition (3), a sealed tank cover (8), an electric heater cable (17), and a high-temperature resistant remote-reading magnetic level gauge (19), characterized in that: The heating tank (1) is equipped with a second explosion-proof partition (4). The heating tank (1) is separated into an explosion-proof isolation chamber (5) and a heating tank chamber (6) by the second explosion-proof partition (4). The tubular electric heater body (2) is fixedly connected to the first explosion-proof partition (3). The tubular electric heater body (2) is provided with a U-shaped electric heating tube (7). The U-shaped electric heating tube (7) passes through the first explosion-proof partition (3). The first explosion-proof partition (3) and the second explosion-proof partition (4) are connected by screws. The heating tank (1) 1) The heating tank cavity (6) is connected to the sealing tank cover (8) by screws. The heating tank cavity (6) is provided with a discharge port (13), a feed port (14), and a rupture disc flange assembly (15). The wiring terminal of the tubular electric heater body (2) is connected to the electric heater cable (17). The electric heater cable (17) is equipped with a die-cast sealing joint (18). The explosion-proof isolation cavity (5) is filled with inert gas. The high-temperature resistant remote magnetic float level gauge (19) is installed on the heating tank body (1) to detect the level of the heating tank cavity (6).

2. The tank-type explosion-proof electric heater according to claim 1, characterized in that, The connection between the No. 1 explosion-proof partition (3) and the No. 2 explosion-proof partition (4) is sealed by a high-temperature resistant sealing ring.

3. The tank-type explosion-proof electric heater according to claim 1, characterized in that, The connection between the heating tank (1) and the sealing tank cover (8) is sealed by a sealing ring.

4. The tank-type explosion-proof electric heater according to claim 1, characterized in that, The heating tank (1) and the sealing tank cover (8) are uniformly fixed with heat dissipation fins (9), which are laid in the explosion-proof isolation cavity (5) area.

5. The tank-type explosion-proof electric heater according to claim 1, characterized in that, The heating tank cavity (6) is provided with an alumina ceramic insulation layer (10), and the explosion-proof isolation cavity (5) is fixedly connected with a one-way air inlet valve (11) and a one-way air outlet valve (12). The one-way air inlet valve (11) and the one-way air outlet valve (12) are threadedly connected with sealing caps.

6. The tank-type explosion-proof electric heater according to claim 1, characterized in that, The inner wall of the heating tank cavity (6) is uniformly equipped with guide plates (16), and the guide plates (16) are staggered on the inner wall of the heating tank cavity (6). The guide plates (16) have through grooves corresponding to the U-shaped electric heating tubes (7).

7. The tank-type explosion-proof electric heater according to claim 1, characterized in that, The die-cast sealing joint (18) is embedded with an alumina ceramic insulating ring, and the electric heater cable (17) is filled with high-temperature sealant between itself and the insulating ring.

8. The tank-type explosion-proof electric heater according to claim 1, characterized in that, The die-cast sealing joint (18) is connected to the heating tank (1) by screws, and the connection is sealed.

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