End cover of an electric water heater

Abstract

The utility model provides a kind of end cover of electric water heater, including inner container body, end cover body is arranged in the both sides of inner container body, end cover body is recessed towards the inside of inner container body, when the pressure inside inner container body is accepted, the protruding part of recessed structure can disperse the stress of water pressure, the utility model is different from traditional convex type by being set as the structure of end cover body recessed towards the inside of inner container body, when inner container is under pressure, recessed protruding part is used as stress dispersion fulcrum, stress is transmitted to multiple areas of end cover body, avoid concentrating in welding, reduce the risk of microcrack due to stress fatigue, improve the sealing reliability and use safety of electric water heater.

Description

Technical Field

[0001] This utility model relates to the field of electric water heater technology, and specifically to an end cap for an electric water heater. Background Technology

[0002] The end cap of an electric water heater is a key component of the inner tank. Its core function is to seal the inner tank and directly bear the water pressure load inside the tank. Therefore, the structural rationality of the end cap not only affects the normal water storage and operation of the electric water heater, but also has a decisive impact on the pressure-bearing safety, operational stability and overall service life of the equipment.

[0003] Currently, in order to meet the water storage capacity requirements of the inner tank, the inner tank end cap of existing electric water heaters mostly adopts an outward-protruding semi-spherical crown structure. The original intention of this outward-protruding design is to adapt the curved shape to the water storage space requirements, which can meet the basic sealing and operation requirements to a certain extent and ensure the daily hot water supply of electric water heaters.

[0004] However, in actual use, when the inner tank is filled with water and pressure is generated, the convex end cap body will generate outward tension under the water pressure. This tension will be transmitted through the end cap body to the welded connection between it and the inner tank. Since the welded connection is a rigid connection point between the end cap body and the inner tank, under repeated water pressure fluctuations and long-term use, the welded connection is prone to micro-cracks due to stress fatigue, which can lead to sealing failure. This not only affects the normal use of the electric water heater but may also pose safety hazards and shorten the service life of the electric water heater. Utility Model Content

[0005] In view of this, the present invention provides an end cap for an electric water heater. By setting the end cap body to be recessed towards the inside of the inner tank body, unlike the traditional convex type, when the inner tank is under pressure, the recessed protrusion acts as a stress dispersion fulcrum, transferring the stress to multiple areas of the end cap body, avoiding concentration at the welding point, reducing the risk of micro-cracks caused by stress fatigue, and improving the sealing reliability and safety of the electric water heater.

[0006] To solve the above-mentioned technical problems, this utility model provides an end cap for an electric water heater, including an inner tank body, with end cap bodies provided on both sides of the inner tank body. The end cap bodies and the inner tank body are fixedly connected by welding to form a sealed water storage space.

[0007] The end cap body is recessed towards the inside of the inner liner body. When the inside of the inner liner body is under pressure, the protruding part of the recessed structure can disperse the stress of the water pressure.

[0008] The end cap body is recessed into the inner liner body with its axis facing inward. The cross-section of the end cap body has a V-shaped structure, that is, the end cap body can be set as a conical structure (or a frustum structure, etc.).

[0009] The recessed part of the end cap body has an arc-shaped structure.

[0010] The recessed portion of the end cap body has a protruding plane, that is, it has a protruding plane and the other surfaces can be irregular in shape.

[0011] The recessed part of the end cap body has a trapezoidal structure.

[0012] The recessed portion of the end cap body has an axial T-shaped structure.

[0013] The beneficial effects of the above-mentioned technical solution of this utility model are as follows:

[0014] 1. Optimize stress distribution and improve safety performance: By setting the end cap body to be recessed towards the inner tank body, the stress mode of the traditional convex end cap body is subverted. When the inner tank is under pressure, the protruding part of the recessed structure can act as a stress dispersion fulcrum, transferring the stress generated by water pressure to multiple areas of the end cap body. This effectively avoids stress concentration at the welding point between the end cap body and the inner tank body, greatly reducing the risk of micro-cracks at the welding point due to stress fatigue, and significantly improving the sealing reliability and safety of the electric water heater.

[0015] 2. Enhanced structural strength and extended service life: Multiple recessed structural designs further enhance the overall performance of the end cap body, making the end cap body more evenly stressed, and protecting the welded parts even when the water pressure fluctuates greatly.

[0016] 3. Efficiently disperses and transforms stress, reducing the impact of localized forces: The V-shaped structure uses its two sides to convert axial pressure into a component force along the inclined plane, reducing the direct force on the welded parts; the arc-shaped structure achieves uniform water pressure transmission through its smooth surface, and its curvature can be adjusted according to different working conditions to achieve the best stress dispersion effect. Both structures can effectively avoid stress concentration and significantly reduce the stress load in localized areas.

[0017] 4. Enhanced structural stability and extended equipment lifespan: The trapezoidal structure, relying on a stable load-bearing frame, is not easily deformed when subjected to high water pressure; the axial T-shaped structure, through lateral and longitudinal load-bearing support, effectively disperses stress in different directions. These structural designs together enhance the overall pressure-bearing capacity and structural stability of the end cover body, thereby extending the service life of the electric water heater.

[0018] 5. Adaptable to diverse needs and easy to process and install: The protruding plane design of the recessed part not only disperses stress but also facilitates the processing of the end cover body. At the same time, it provides convenience for the installation of auxiliary components. Various recessed structure forms can be selected according to different needs such as the capacity and pressure rating of the electric water heater. It has strong adaptability and can ensure the good performance of the end cover body under various working conditions, taking into account both practicality and economy. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the end cap body structure of this utility model (with the axis facing the interior of the inner liner body and recessed);

[0021] Figure 3 This is a schematic diagram of the end cap body structure (trapezoidal structure) of this utility model;

[0022] Figure 4 This is a schematic diagram of the end cap body structure (axial T-shaped structure) of this utility model.

[0023] In the diagram: 101, inner liner body; 102, end cap body. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the following will be described in conjunction with the accompanying drawings of the embodiments of this utility model. Figures 1-4 The technical solutions of the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model are within the protection scope of this utility model.

[0025] Example 1:

[0026] An end cap for an electric water heater, such as Figure 1 As shown: It includes an inner liner body 101, and end cap bodies 102 are provided on both sides of the inner liner body 101. The end cap bodies 102 are fixedly connected to the inner liner body 101 by welding to form a sealed water storage space.

[0027] like Figure 1 As shown: the end cap body 102 is recessed towards the inside of the inner liner body 101, replacing the traditional outward protrusion of the end cap body 102 under stress. When the inner liner body 101 is under pressure, the protrusion of the recessed structure can act as a stress distribution fulcrum (such as the outward pressure of water on the end cap body 102, the pressure generated by water vapor not being removed during heating, etc.), transferring the stress generated by water pressure to multiple areas of the end cap body 102, and avoiding stress concentration at the welding part between the end cap body 102 and the inner liner body 101.

[0028] Instead of the traditional convex end cap body 102, it prevents stress concentration at the weld and significantly reduces the possibility of microcracks appearing at the weld due to stress.

[0029] like Figure 1 , 2As shown: Furthermore, the end cap body 102 is recessed into the inner liner body 101 with its axis inward, and the cross-section of the end cap body 102 is V-shaped, that is: the end cap body 102 can be set as a conical structure (or a frustum structure, etc.).

[0030] The two sides of the V-shaped structure provide a path for stress transmission, converting axial pressure into a component force along the inclined plane. This component force is transmitted along the inclined side of the V-shape to the edge of the end cap body 102, thereby reducing the direct force on the welded parts.

[0031] At the same time, the V-shaped structure itself has high structural strength, which can better resist the deformation caused by water pressure and enhance the overall pressure bearing capacity of the end cap body 102.

[0032] like Figure 1 As shown: Preferably, the recessed portion of the end cap body 102 is an arc-shaped structure with a smooth transition on the arc surface, thereby dispersing stress through its arc surface and avoiding local stress concentration caused by structural protrusion.

[0033] During the pressurization process, the water pressure can be evenly transmitted along the arc-shaped surface. The curvature of the arc-shaped structure can be adjusted according to electric water heaters of different capacities and pressure levels to ensure the best stress dispersion effect under various working conditions. This not only ensures the structural stability of the end cover body 102, but also extends its service life.

[0034] Example 2:

[0035] The difference from Example 1 is as follows:

[0036] like Figure 1 As shown: The recessed portion of the end cap body 102 has a protruding plane, that is, it is a protruding plane and the other surfaces can be irregular in shape. The protruding plane forms a relatively stable stress area in the recessed structure.

[0037] When the inner liner is under pressure, the protruding surface can directly bear a portion of the water pressure and transmit the pressure to the concave edges around the surface. This not only effectively disperses the stress but also facilitates the processing of the end cap body 102. The flat area can also be convenient for the installation or connection of some auxiliary components.

[0038] like Figure 1 , 3 As shown: Furthermore, the recessed portion of the end cap body 102 is a trapezoidal structure, which is arranged along the axial direction of the inner liner body 101. The two waist sides of the trapezoid and the left and right bottom sides form a stable force-bearing frame.

[0039] When water pressure acts on a trapezoidal structure, the stress is evenly distributed along the waist and bottom edges, which can maintain the shape of the structure under high water pressure and effectively resist deformation.

[0040] In addition, the trapezoidal structure makes the stress at the welding point more stable when the end cap body 102 is welded to the inner liner body 101, further reducing the risk of stress fatigue at the welding point.

[0041] like Figure 1 , 4 As shown: Preferably, the recessed portion of the end cap body 102 is an axial T-shaped structure, which is distributed along the axial direction of the end cap body 102 to form transverse and longitudinal force support.

[0042] The transverse section can disperse radial water pressure stress, while the longitudinal section can bear axial stress. The two work together to effectively disperse stress in different directions.

[0043] The axial T-shaped structure enhances the overall strength of the end cap body 102 in both the axial and radial directions, making the end cap body 102 less prone to deformation during long-term use and ensuring the sealing performance and structural stability of the inner tank body 101 of the electric water heater.

[0044] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0045] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. An end cap for an electric water heater, comprising an inner tank body (101), with end cap bodies (102) disposed on both sides of the inner tank body (101), characterized in that: The end cap body (102) is recessed towards the interior of the inner liner body (101). When the interior of the inner liner body (101) is under pressure, the protrusion of the recessed structure can disperse the stress of the water pressure.

2. The end cap of the electric water heater as described in claim 1, characterized in that: The end cap body (102) is recessed into the inner liner body (101) with its axis facing inward, and the cross-section of the end cap body (102) has a V-shaped structure.

3. The end cap of the electric water heater as described in claim 2, characterized in that: The recessed portion of the end cap body (102) has an arc-shaped structure.

4. The end cap of the electric water heater as described in claim 1, characterized in that: The recessed portion of the end cap body (102) has a protruding plane.

5. The end cap of the electric water heater as described in claim 4, characterized in that: The recessed portion of the end cap body (102) has a trapezoidal structure.

6. The end cap of the electric water heater as described in claim 5, characterized in that: The recessed portion of the end cap body (102) has an axial T-shaped structure.

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