An explosion-proof heater

Abstract

This utility model discloses an explosion-proof heater, comprising multiple sets of U-shaped tubes. Each tube has an end cap at both ends, and an electric heating element is mounted on the end cap. The outer end of the electric heating element is connected to an explosion-proof junction box, and the heating element is located within the tube. An inlet pipe is connected to the upper part of one end of the tube, and an outlet pipe is connected to the lower part of the tube near the other end. Flanges are connected to both the inlet and outlet pipes. The tube is connected to the inlet pipe of the tube below it via the flange on the outlet pipe. Two tubes can be joined together via the inlet pipe of one tube and the outlet pipe of another, allowing for the creation of multiple sets of tubes. This increases the capacity of the heated medium and enables continuous heating of the medium.

Description

Technical Field

[0001] This utility model relates to the field of heater technology, specifically an explosion-proof heater. Background Technology

[0002] Explosion-proof heaters are internationally popular high-quality, long-life electric heating devices used for heating, maintaining, and warming flowing liquid and gaseous media. When the heating medium passes through the heating chamber of the electric heater under pressure, the principle of fluid thermodynamics is used to uniformly remove the enormous heat generated by the heating element during operation, ensuring the heated medium reaches the user's process requirements. The explosion-proof housing assembly of an explosion-proof heater typically includes an explosion-proof shell, an explosion-proof junction box, and an explosion-proof control panel.

[0003] However, the current explosion-proof heaters mainly have the following problems: (1) Each heater is independent and the capacity of the heating medium is fixed. Multiple heaters cannot be spliced ​​together, and the capacity of the heating medium cannot be adjusted. (2) Temperature control is lagging, and single-point temperature measurement cannot reflect the temperature of the core heating element in real time. Utility Model Content

[0004] In view of the shortcomings of the existing technology, this utility model provides an explosion-proof heater to solve the problems of the inability to splice explosion-proof heaters and the lag in temperature control.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] An explosion-proof heater includes multiple U-shaped tubes. Each tube has an end cap at both ends, and an electric heating element is mounted on the end cap. The outer end of the electric heating element is connected to an explosion-proof junction box. The electric heating element is located inside the tube. An inlet pipe is connected to the upper part of the tube near one end, and an outlet pipe is connected to the lower part of the tube near the other end. Both the inlet and outlet pipes are connected to flanges. The tube is connected to the inlet pipe of the tube below it via the flange on the outlet pipe.

[0007] Preferably, the pipe wall consists of a stainless steel layer, a heat-insulating filling layer, and a ceramic layer from the inside out.

[0008] The above technical solution improves the structural strength of the pipe body by setting a stainless steel layer, and achieves the function of heat preservation through the heat insulation filling layer and ceramic layer.

[0009] Preferably, the connector includes a connecting rod and clamps fixedly connected to both ends of the connecting rod, with the tube body clamped inside the clamps.

[0010] The above technical solution involves placing the pipes in the corresponding clamps and tightening the clamps when connecting two adjacent pipes, so that the two pipes can be connected together by a connecting rod.

[0011] Preferably, an installation block is installed at the end of the heating element, a main sensor is embedded in the installation block, and a secondary sensor is installed on the inner wall of the tube. Both the main sensor and the secondary sensor are led to the control module through the heat insulation filling layer.

[0012] The above technical solution automatically switches to the backup sensor inside the tube and triggers a shutdown when the main sensor detects that the temperature is greater than the set value or the signal is abnormal.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] (1) Two tubes can be spliced ​​together by the inlet pipe of one tube and the outlet pipe of another tube, so that multiple sets of tubes can be spliced ​​together. On the one hand, the capacity of the medium to be heated can be increased, and on the other hand, the medium can be continuously heated.

[0015] (2) By setting up a main sensor and a secondary sensor, fault warning can be achieved through dual temperature monitoring to avoid the risk of overheating and explosion. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 for Figure 1 The right view;

[0018] Figure 3 for Figure 1 The left view;

[0019] Figure 4 This is a cross-sectional view of the pipe wall;

[0020] Figure 5 This is a cross-sectional view of the present invention;

[0021] In the diagram: 1-pipe body, 101-stainless steel layer, 102-thermal insulation filling layer, 103-ceramic layer, 2-end cap, 3-heating tube, 4-inlet pipe, 5-outlet pipe, 6-explosion-proof junction box, 7-connecting rod, 8-clamp, 9-installation pin, 10-main sensor, 11-subsidiary sensor. Detailed implementation method:

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example 1

[0024] Please see Figures 1-4 An explosion-proof heater includes multiple U-shaped tubes 1. The tube wall of each tube 1 consists of a stainless steel layer 101, a heat-insulating filling layer 102, and a ceramic layer 103, arranged from the inside out. The stainless steel layer enhances the structural strength of the tube, while the heat-insulating filling layer and ceramic layer provide insulation.

[0025] Both ends of the tube body 1 are fitted with end caps 2, and heating elements 3 are mounted on the end caps 2. The heating elements 3 are located inside the tube body 1, and their outer ends are connected to explosion-proof junction boxes 6. An inlet pipe 4 is connected to the upper part of the tube body 1 near one end, and an outlet pipe 5 is connected to the lower part of the tube body 1 near the other end. Both the inlet pipe 4 and the outlet pipe 5 are connected with flanges, and the tube body 1 is connected to the inlet pipe 4 of the tube body below it through the flange on the outlet pipe 5.

[0026] In addition, the upper and lower pipes 1 are connected by a connector. The connector includes a connecting rod 7 and clamps 8 fixedly connected to both ends of the connecting rod, with the pipe 1 clamped in the clamps 8. After the two pipes are joined together, they need to be fixed again. At this time, the pipes are first placed in the corresponding clamps and the clamps are tightened, so that the two pipes can be connected together by the connecting rod.

[0027] Two tubes can be joined together by connecting the inlet pipe of one tube and the outlet pipe of another tube, thus allowing for the creation of multiple sets of tubes. This increases the capacity of the medium to be heated and enables continuous heating of the medium.

[0028] Example 2

[0029] Based on Example 1, such as Figure 5 As shown, a mounting block 9 is installed at the end of the heating element 3, and a main sensor 10 is embedded in the mounting block 9. A secondary sensor 11 is installed on the inner wall of the tube body 1. Both the main sensor 10 and the secondary sensor 11 are led to the control module through the heat insulation filling layer 102. The control module is located in an explosion-proof junction box. In addition, a mica heat insulation sheet is added between the heating element and the sensor to reduce the risk of thermal shock damage.

[0030] When the main sensor detects a temperature exceeding the set value or an abnormal signal, it automatically switches to the backup sensor inside the tube and triggers a shutdown. This dual-temperature monitoring system provides fault warning and avoids the risk of overheating and explosion.

[0031] In addition, the main sensor can be directly mounted on the heating element, which can significantly improve temperature control accuracy and response speed, but it must pass the following tests: embedded mounting structure (avoid direct contact with high temperature), laser sealing process (meet explosion-proof requirements), and thermal stress relief design (ensure long-term stability).

[0032] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An explosion-proof heater, characterized in that: It includes multiple U-shaped tubes (1), with end caps (2) installed at both ends of the tubes (1), and electric heating tubes (3) installed on the end caps (2). The electric heating tubes (3) are located inside the tubes (1). An inlet pipe (4) is connected to the upper part of the tubes (1) near one end, and an outlet pipe (5) is connected to the lower part of the tubes (1) near the other end. Both the inlet pipe (4) and the outlet pipe (5) are connected to flanges. The tubes (1) are connected to the inlet pipe (4) of the tubes below them through the flange on the outlet pipe (5).

2. The explosion-proof heater according to claim 1, characterized in that: The pipe wall of the pipe body (1) consists of a stainless steel layer (101), a heat insulation filling layer (102), and a ceramic layer (103) from the inside to the outside.

3. The explosion-proof heater according to claim 2, characterized in that: The outer end of the heating element (3) is connected to an explosion-proof junction box (6).

4. The explosion-proof heater according to claim 3, characterized in that: The upper and lower pipes (1) are also connected by connectors.

5. The explosion-proof heater according to claim 4, characterized in that: The connector includes a connecting rod (7) and clamps (8) fixedly connected to both ends of the connecting rod, with the tube body (1) clamped inside the clamps (8).

6. The explosion-proof heater according to claim 5, characterized in that: The heating tube (3) is equipped with a mounting block (9) at its end. A main sensor (10) is embedded in the mounting block (9). A secondary sensor (11) is installed on the inner wall of the tube body (1). Both the main sensor (10) and the secondary sensor (11) are connected to the control module through the heat insulation filling layer (102).

Images