Detachable heat source assembly for enhanced heat transfer electric heater

Abstract

A detachable heat source component of an enhanced heat transfer electric heater includes a plurality of transversely arranged tube bodies, both ends of the tube bodies are set to be open, and a plurality of groups of parallel resistor tube components are installed inside the tube bodies. The structure of a single resistor tube component is as follows: it includes a plurality of first resistor tubes distributed transversely and in parallel, the head end of the first resistor tube passes through a flange and is supported by a ceramic support, the tube head of the first resistor tube is connected to a first electrode connector, the tail end of the first resistor tube passes through a second electrode connector, the second electrode connector is located inside the tube body, and a plurality of ceramic supports are installed on each first resistor tube at intervals; the head of one of the resistor tube components of two adjacent tube bodies passes through the flange and is connected to an electrode plate at the same time; each first electrode connector is connected to a power box through a power cord. It is not necessary to pull out all the electric heating components, which greatly reduces the workload, and the maintenance is fast and efficient, and has a good filtering and protection function.

Description

Technical Field

[0001] The invention relates to the technical field of electric heaters, in particular to a detachable heat source component of an electric heater with enhanced heat transfer. Background Art

[0002] The electric heater is a core electric heating device for the technical research and development and performance verification of key military equipment. It is used to heat the flowing gaseous medium. When the heating medium passes through the heating chamber of the electric heater under pressure, the huge heat generated by the internal operation of the electric heating element is evenly taken away by the principle of fluid thermodynamics, so that the temperature of the heated medium meets the process requirements.

[0003] The electric heater in the prior art has a complex structure and uses an integral electric heating component inside. When the equipment fails, the entire electric heating component inside needs to be pulled out and the whole core is pulled out. The maintenance workload is huge, the time cycle is long, the work is cumbersome, the maintenance cost is high, and the heating effect is poor. Summary of the invention

[0004] In view of the shortcomings of the above-mentioned existing production technology, the applicant provides a structurally reasonable detachable heat source component of an enhanced heat transfer electric heater, which can be easily repaired by simply pulling out one of the damaged components without having to pull out the entire electric heating element. This greatly reduces the workload, makes maintenance quick and efficient, and has a good filtering and protection function.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A detachable heat source component of an enhanced heat transfer electric heater comprises a plurality of transversely arranged tubes, both ends of which are open, and a plurality of parallel-connected resistor tube components are installed inside the tubes.

[0007] The structure of a single resistor tube assembly is as follows: it includes a plurality of first resistor tubes that are horizontally parallel and spaced apart, the head end of the first resistor tube passes through a flange and is supported by a ceramic support, the tube head of the first resistor tube is connected to a first electrode connector, the tail end of the first resistor tube passes through a second electrode connector, the second electrode connector is located inside the tube body, and a plurality of ceramic supports are installed at intervals on each first resistor tube;

[0008] The head of one of the resistor tube assemblies of two adjacent tube bodies passes through the flange and is simultaneously connected to an electrode plate;

[0009] Each first electrode connector is connected to the power box via a power line.

[0010] As a further improvement of the above technical solution:

[0011] Two resistor tube assemblies are arranged in a single tube body, and the two resistor tube assemblies are respectively three first resistor tubes distributed in parallel and spaced apart and three second resistor tubes distributed in parallel and spaced apart.

[0012] Each of the first resistor tubes and the second resistor tubes has the same length, and a plurality of ceramic support members are evenly spaced and distributed on each of the first resistor tubes and the second resistor tubes.

[0013] Each of the first resistor tube and the second resistor tube is an integrated resistor tube, and the power decreases from the head end to the tail end.

[0014] Each of the first resistor tube and the second resistor tube has a front section with high power, a middle section with medium power, and a rear section with low power.

[0015] The flange is located at the head end of the pipe body.

[0016] The tube body is a tubular structure.

[0017] The tube body is in a cylindrical structure.

[0018] The structure of the tube body is as follows: it comprises a tube shell, both ends of the tube shell are provided with openings, and a plurality of evenly spaced first long strip holes are opened on the circumferential surface of the rear end of the tube shell.

[0019] The structure of the tube body is as follows: it includes a tube shell, a matching cone structure is welded at the tail of the tube shell, a plurality of evenly spaced first long strip holes are opened on the circumferential surface of the tail of the tube shell, and a plurality of second long strip holes are opened on the cone structure.

[0020] The beneficial effects of the present invention are as follows:

[0021] The present invention has a compact and reasonable structure and is easy to operate. The heat source component adopts a component structure, which is easy to install and process, and easy to maintain. When maintenance is required, there is no need to pull out the entire electric heating element, but only one of the damaged components needs to be pulled out, which greatly reduces the workload, and the maintenance is fast, efficient and low-cost.

[0022] The power of the single resistor tube described in the present invention decreases from the head end to the tail end, which can greatly improve the heat exchange efficiency.

[0023] Each resistor tube described in the present invention has the same length and structure, is easy to install and maintain, and has good versatility.

[0024] The present invention adopts GH3030 resistance tube as the heating source, and the heating core is a multi-group parallel structure. Each group of heating elements can be independently pulled out. A single heating component is light in weight and has a fast heating and cooling rate (under the condition of a certain heating power, the heating and cooling rate of an object is inversely proportional to its weight, that is, the lighter the weight, the higher the heating and cooling rate). At the same time, the heating component is light in weight, which can reduce the difficulty of maintenance. The outlet temperature of the medium is relatively high. In order to meet the long-term working life, the electric heating element must be able to withstand high temperature. The material can withstand a high temperature of 1200°C for a short time. When the working temperature is ≤900°C and the pressure difference between the inside and outside of the tube is ≤30KPa (the difference from the conventional use condition is that the large internal pressure at high temperature will cause the resistance tube to swell, so not only the high temperature resistance performance should be considered, but also its high temperature strength). It can work stably for a long time.

[0025] The tube shell of the present invention is provided with long strip holes, which can play a filtering and protecting function. When the ceramic support is damaged, the broken pieces will not flow out with the strong airflow, but can fall into the tube shell, so the working reliability is good and the service life of the whole machine is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is an application diagram of the present invention.

[0027] Figure 2 It is a structural schematic diagram of the present invention.

[0028] Figure 3 Schematic diagram of the structure of the tube body of the present invention (Example 1).

[0029] Figure 4 Schematic diagram of the structure of the tube body of the present invention (Example 2).

[0030] Wherein: 1. Cover; 2. Outer shell; 3. Inner shell; 4. First electrode connector; 5. First resistor tube; 6. Ceramic support; 7. Second resistor tube; 8. Second electrode connector; 9. Tube body; 10. Flange; 11. Electrode plate; 12. Power cord; 13. Power box;

[0031] 901, tube shell; 902, first elongated hole; 903, cone structure; 904, second elongated hole. DETAILED DESCRIPTION

[0032] The specific implementation of the present invention will be described below in conjunction with the accompanying drawings.

[0033] like Figure 1 and Figure 2As shown, the detachable heat source component of the enhanced heat transfer electric heater of this embodiment is installed in the electric heater. The electric heater mainly includes an inner shell 3. A plurality of support plates (not shown in the figure) are installed at intervals inside the inner shell 3. A circular hole is opened on the support plate (not shown in the figure) to pass through the heat source component. Each heat source component passes through each support plate (not shown in the figure). The head end of each heat source component passes through the head end position of the inner shell 3, and an outer shell 2 is arranged on the outside of the inner shell 3. The head end position of the outer shell 2 is connected to a cover 1 through a flange, and the tail end of the inner shell 3 and the outer shell 2 are both opened with a connecting hole.

[0034] The structure of the heat source assembly is as follows: it includes a plurality of transversely arranged tube bodies 9, both ends of the tube bodies 9 are set to be open, and a plurality of groups of parallel-connected resistor tube assemblies are installed inside the tube bodies 9.

[0035] The structure of a single resistor tube assembly is as follows: it includes a plurality of first resistor tubes 5 that are distributed in parallel and at intervals in a transverse direction, the head end of the first resistor tube 5 passes through a flange 10 and is supported by a ceramic support 6, the tube head of the first resistor tube 5 is connected to a first electrode connector 4, the tail end of the first resistor tube 5 passes through a second electrode connector 8, the second electrode connector 8 is located inside a tube body 9, and a plurality of ceramic support members 6 are installed at intervals on each first resistor tube 5;

[0036] The head of one of the resistor tube assemblies of two adjacent tube bodies 9 passes through the flange 10 and is simultaneously connected to an electrode plate 11;

[0037] Each first electrode connector 4 is connected to a power box 13 via a power line 12 .

[0038] Two resistor tube assemblies are arranged in a single tube body 9, and the two resistor tube assemblies are respectively three first resistor tubes 5 distributed in parallel and spaced apart and three second resistor tubes 7 distributed in parallel and spaced apart.

[0039] Each of the first resistor tube 5 and the second resistor tube 7 has the same length, and a plurality of ceramic support members 6 are evenly spaced and distributed on each of the first resistor tube 5 and the second resistor tube 7 .

[0040] Each of the first resistor tube 5 and the second resistor tube 7 is an integrated resistor tube, and the power decreases from the head end to the tail end.

[0041] Each of the first resistor tube 5 and the second resistor tube 7 has a front section with high power, a middle section with medium power, and a rear section with low power.

[0042] The flange 10 is located at the head end of the tube body 9 .

[0043] The tube body 9 is a tubular structure.

[0044] The tube body 9 is a cylindrical structure.

[0045] like Figure 3 As shown, the structure of the tube body 9 is as follows: it includes a tube shell 901 , both ends of the tube shell 901 are provided with openings, and a plurality of evenly spaced first long strip holes 902 are opened on the rear circumferential surface of the tube shell 901 .

[0046] like Figure 4 As shown, the structure of the tube body 9 is: including a tube shell 901, a matching cone structure 903 is welded at the tail of the tube shell 901, a plurality of evenly spaced first elongated holes 902 are opened on the circumferential surface of the tail of the tube shell 901, and a plurality of second elongated holes 904 are opened on the cone structure 903.

[0047] The present invention adopts a design with different powers for the front section, middle section and tail end of the same resistance tube, so as to achieve high heating power at the front and low heating power at the back, thereby improving the heat transfer coefficient (generally, the smaller the heat transfer distance, the higher the heat transfer coefficient), and at the same time can reduce equipment costs, save space and reduce equipment size.

[0048] In actual use, according to actual needs, such as Figure 1 As shown, two groups of resistor tube assemblies can be arranged inside each tube body 9, three parallel and spaced first resistor tubes 5 and three parallel and spaced second resistor tubes 7, five ceramic support members 6 are evenly distributed on each first resistor tube 5 and second resistor tube 7, the inside of each ceramic support member 6 is a metal bushing and the outside is a supporting ceramic, the metal bushing directly passes through the resistor tube, the metal bushing is integrally molded, and there is a gap between the resistor tube and the supporting ceramic, and the supporting ceramic is made of silicon carbide material or alumina ceramic material to reduce the thermal shock of the ceramic and resist the flow impact force of the resistor tube on the ceramic. The head ends of the three first resistor tubes 5 pass through the flange 10 and are connected to the first electrode connecting plate 4, the tail ends of the three first resistor tubes 5 pass through the second electrode connecting member 8, the head ends of the three second resistor tubes 7 pass through the flange 10 and are connected to the electrode plate 11, and the tail ends of the three second resistor tubes 7 pass through the second electrode connecting member 8; a group of resistor tube assemblies in another tube body 9 are connected to the electrode plate 11 at the same time, and all the first electrode connecting plates 4 are connected to the power box 13 through the power line 12.

[0049] During operation, if a resistor tube assembly is damaged, just turn off the connected power box 13, pull out one or two groups of resistor tube assemblies from the inside of the tube body 9, or pull them out together with the tube body 9 for inspection and maintenance. After maintenance, it can be installed. There is no need to pull out the core structure inside the entire electric heater, which greatly reduces the workload and makes maintenance quick, efficient and low-cost.

[0050] The above description is an explanation of the present invention, not a limitation of the present invention. The scope of the present invention is defined in the claims. Any form of modification may be made within the scope of protection of the present invention.

Claims

1. A detachable heat source assembly of an enhanced heat transfer electric heater, characterized in that: It comprises a plurality of transversely arranged tube bodies (9), both ends of the tube bodies (9) being arranged to be open, and a plurality of groups of resistor tube assemblies arranged in parallel being installed inside the tube bodies (9). The structure of a single resistor tube assembly is as follows: it comprises a plurality of first resistor tubes (5) which are arranged in parallel and spaced apart in a transverse direction, the head end of the first resistor tube (5) passes through a flange (10) and is supported by a ceramic support member (6), the tube head of the first resistor tube (5) is connected to a first electrode connector (4), the tail end of the first resistor tube (5) passes through a second electrode connector (8), the second electrode connector (8) is located inside a tube body (9), and a plurality of ceramic support members (6) are installed at intervals on each first resistor tube (5); The head of one of the resistor tube assemblies of two adjacent tube bodies (9) passes through a flange (10) and is simultaneously connected to an electrode plate (11); Each first electrode connector (4) is connected to a power supply box (13) via a power supply line (12); two resistor tube assemblies are arranged in a single tube body (9), and the two resistor tube assemblies are respectively three first resistor tubes (5) distributed in parallel and spaced apart and three second resistor tubes (7) distributed in parallel and spaced apart; each first resistor tube (5) and second resistor tube (7) have the same length, and each first resistor tube (5) and second resistor tube (7) has a plurality of ceramic support members (6) evenly distributed at intervals; each first resistor tube (5) and second resistor tube (7) is an integrated resistor tube, and the power decreases from the head end to the tail end in descending order.

2. The detachable heat source assembly of the enhanced heat transfer electric heater according to claim 1, characterized in that: Each of the first resistor tube (5) and the second resistor tube (7) has a front section with high power, a middle section with medium power, and a rear section with low power.

3. The detachable heat source assembly of the enhanced heat transfer electric heater according to claim 1, characterized in that: The flange (10) is located at the head end of the tube body (9).

4. The detachable heat source assembly of the enhanced heat transfer electric heater as claimed in claim 1, characterized in that: The tube body (9) is a tubular structure.

5. The detachable heat source assembly of the enhanced heat transfer electric heater as claimed in claim 1, characterized in that: The tube body (9) is in a cylindrical structure.

6. The detachable heat source assembly of the enhanced heat transfer electric heater according to claim 1, characterized in that: The structure of the tube body (9) is as follows: it comprises a tube shell (901), both ends of the tube shell (901) are provided with openings, and a plurality of evenly spaced first long strip holes (902) are opened on the rear circumferential surface of the tube shell (901).

7. The detachable heat source assembly of the enhanced heat transfer electric heater according to claim 1, characterized in that: The structure of the tube body (9) is as follows: it comprises a tube shell (901), a matching conical structure (903) is welded to the tail of the tube shell (901), a plurality of evenly spaced first elongated holes (902) are opened on the circumferential surface of the tail of the tube shell (901), and a plurality of second elongated holes (904) are opened on the conical structure (903).

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