Flange-free enamel inner container

Abstract

The utility model provides a flange-free enamel inner container, and mainly relates to the field of water heater inner containers. A flange-free enamel inner container comprises a cylinder, a circulating water inlet, a circulating water outlet and a drain outlet are formed in the side face of the cylinder, and the center of one end of the cylinder is flange-free and provided with an exhaust pipe. The utility model has the beneficial effects that the material cost and the process cost can be reduced, the water leakage probability in the use of the inner container is reduced, and the product competitiveness is improved.

Description

Technical Field

[0001] This utility model mainly relates to the field of water heater inner tanks, specifically a flangeless enamel inner tank. Background Technology

[0002] An enamel-lined water heater tank is a structure in which one or more layers of enamel (also known as enamel coating) are applied to the surface of a metal substrate (usually steel plate). Enamel-lined tanks offer corrosion resistance, high-temperature resistance, and good insulation, effectively improving the lifespan and safety of the water heater.

[0003] Current enamel lining processes require pouring molten enamel into the inner tank, then rotating the tank to ensure the molten enamel adheres evenly and thoroughly to the inner wall, improving enamel quality. The inner tank is then sintered to complete the enamel lining process. To facilitate better molten enamel pouring, a relatively large filling hole is typically provided in the water heater's inner tank; this hole will later be used as a vent. However, this hole is too large for a vent, so the industry standard is to install a connecting flange at this location. During subsequent installation, a smaller diameter vent pipe is connected via the flange to achieve the desired function.

[0004] Because the previous enamel technology was relatively backward, it was necessary to reserve a large aperture to provide a structural basis for the enamel process. However, with the advancement of enamel technology, the enamel liquid can be coated by uniform spraying. Therefore, based on this, we designed an enamel inner liner that does not have flanges. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a flangeless enamel liner that can reduce material and processing costs, decrease the probability of leakage during use, and improve product competitiveness.

[0006] To achieve the above objectives, this utility model employs the following technical solution:

[0007] A flangeless enamel liner includes a cylindrical body, the side of which has a circulating water inlet, a circulating water outlet, and a drain outlet, and one end of the cylindrical body has no flange and is provided with an exhaust pipe.

[0008] The cylinder includes a cylinder body, an upper end cap, and a lower end cap. The upper end cap and the lower end cap are respectively located at both ends of the cylinder body, and the exhaust pipe is located at the center of the upper end cap.

[0009] The lower end cap is equipped with a lifting lug at the top.

[0010] The circulating water outlet and the circulating water inlet are located on opposite sides, and the sewage outlet is located on the same side as the circulating water outlet.

[0011] Compared with the existing technology, the beneficial effects of this utility model are:

[0012] This utility model replaces the original flange structure with a smaller vent hole. Based on the improvement of the enamel process, the original enamel inner tank structure of the water heater has been innovated. The innovated enamel inner tank no longer needs a flange to connect the vent pipe. It can be directly connected by a cap. The vent pipe is directly welded to the inner tank. After the connection, the sealing effect is better, reducing the probability of water and air leakage during subsequent use. It also reduces the cost of parts and processes, improves product quality, and enhances product competitiveness. Attached Figure Description

[0013] Appendix Figure 1 This is a schematic diagram of the structure from the main viewpoint of this utility model;

[0014] Appendix Figure 2 This is a schematic diagram of the structure from the left-side view of this utility model;

[0015] Appendix Figure 3 This is a schematic diagram of the physical structure of this utility model;

[0016] Appendix Figure 4 This is a schematic diagram of the original inner flange structure.

[0017] The labels shown in the attached diagram are as follows: 1. Cylinder body; 2. Circulation inlet; 3. Circulation outlet; 4. Sewage outlet; 5. Vent pipe; 6. Lifting lug; 11. Cylinder body; 12. Upper end cap; 13. Lower end cap. Detailed Implementation

[0018] The present invention will be further described in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined in this application.

[0019] like Figure 1-4 As shown, the flangeless enamel liner of this utility model includes a cylindrical body 1, which is welded together. The cylindrical body 1 comprises three parts: a cylindrical body 11, an upper end cap 12, and a lower end cap 13. The upper end cap 12 and the lower end cap 13 are respectively located at both ends of the cylindrical body 11. The cylindrical body is formed by rolling and welding sheet metal. The upper end cap 12 and the lower end cap 13 are stamped and shaped, and then the edges are removed before welding and shaping. After welding, the cylindrical body 1 is cleaned, coated with enamel, and then sintered and shaped.

[0020] The cylinder 1 has a circulating water inlet 2, a circulating water outlet 3, and a drain outlet 4 on its side. One end of the cylinder 1 has no flange and is equipped with an exhaust pipe 5. In this embodiment, the exhaust pipe 5 is located at the center of the upper end cap 12. The circulating water inlet 2 connects to a tap water pipe for heating and insulation, while the circulating water outlet 3 connects to a hot water pipe for hot water to be supplied to a faucet or showerhead. The drain outlet 4 is used for drainage, releasing the water flow directly when not in frequent use. The exhaust port 5 serves as an air outlet, expelling air during water filling to balance the pressure inside the cylinder 1. Simultaneously, the exhaust port 5 also serves as a working hole for the enamel coating process, allowing the nozzle for spraying enamel liquid to be inserted to complete the enamel coating. This novel enamel-lined liner utilizes a new enamel coating process, allowing the exhaust pipe of the exhaust port 5 to be directly welded to the liner, reducing the diameter of the air inlet to half or even one-third of its original size. This eliminates the need for a flange structure on the liner, reducing the number of matching flange and exhaust pipe components and saving costs. At the same time, this structural change avoids the flange installation structure between the air outlet pipe and the tank, thereby reducing the probability of air and water leakage at the connection point after long-term use, improving product life and product quality.

[0021] Specifically, a lifting lug 6 is provided on the top of the lower end cap 13. The lifting lug 6 serves as the lifting part during the production line processing of the enamel inner liner, providing a structural foundation for automated production. After production is completed, the lifting lug 6 is removed or flattened to fit the inner liner, avoiding interference with the inner liner during subsequent installation and use.

[0022] Specifically, the circulating water outlet 3 and the circulating water inlet 2 are located on opposite sides, while the drain outlet 4 is located on the same side as the circulating water outlet 3. During installation, the side containing the circulating water outlet 3 and the circulating water inlet 2 is positioned downwards to facilitate the extraction of hot water.

[0023] This invention provides an improvement to the enamel inner tank of a water heater based on existing enamel technology. The original large vent with a flange has been replaced with a smaller diameter vent pipe, reducing the problem of larger flange welding seams that could lead to leaks later. It also reduces the likelihood of leaks occurring after flange installation over time. This structural change reduces the cost of the flange structure and welding, thereby improving product lifespan and quality.

Claims

1. A flangeless enamel liner, comprising a cylindrical body (1), characterized in that: The cylinder (1) has a circulating water inlet (2), a circulating water outlet (3) and a sewage outlet (4) on its side. The cylinder (1) has no flange at one end and is equipped with an exhaust pipe (5).

2. The flangeless enamel inner liner according to claim 1, characterized in that: The cylinder (1) includes a cylinder body (11), an upper end cap (12) and a lower end cap (13). The upper end cap (12) and the lower end cap (13) are respectively located at both ends of the cylinder body (11), and the exhaust pipe (5) is located at the center of the upper end cap (12).

3. A flangeless enamel inner liner according to claim 2, characterized in that: The lower end cap (13) is provided with a lifting lug (6) at the top.

4. A flangeless enamel inner liner according to claim 1, characterized in that: The circulating water outlet (3) and the circulating water inlet (2) are located on opposite sides, and the sewage outlet (4) is located on the same side as the circulating water outlet (3).

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