Water pipe connecting structure for water heater and water heater

Abstract

The utility model discloses a water pipe connecting structure for water heater and water heater, it belongs to water heater technical field, water pipe connecting structure for water heater includes insulating base body and embedded part, and embedded part extends along the first axis, and at least part embedded part is embedded in the insulating base body and is connected as a whole with insulating base body, and the part of embedded part embedded in the insulating base body is provided with limiting recess, and at least two limiting recesses extend around the circumference of embedded part to form sealed groove, and at least two sealed grooves are provided with sealing washer in interference. The water heater includes an inner container, the inner container is provided with an inner container connector, and the inner container connector is connected with the water pipe connecting structure for water heater. At least two sealed grooves are provided with sealing washer in interference, realize multilayer protection, even if the gap between embedded part and insulating base body produces, sealing washer can play the sealing effect, prevent water leakage and prevent electric shock, guarantee use safety.

Description

Technical Field

[0001] This utility model relates to the field of water heater technology, and in particular to a water pipe connection structure for a water heater and a water heater. Background Technology

[0002] Most water heaters currently employ anti-electric shock technology, with the anti-electric shock insulating joint being a key component. This joint consists of two threaded metal parts embedded in a plastic screw head, used for water pipe installation and connection. However, the plastic screw head can be affected by thermal shock, natural aging, or external impacts, leading to a decrease in strength over time. This can easily cause the metal parts to detach from the plastic screw head, creating gaps that can result in leaks or even electric shock, posing a safety hazard. Utility Model Content

[0003] This utility model provides a water pipe connection structure and a water heater to solve the technical problem in the prior art where metal parts and plastic screw heads are easily separated, creating gaps that lead to water leakage.

[0004] Based on the above concept, the technical solution adopted by this utility model is as follows:

[0005] A water pipe connection structure for a water heater includes: an insulating substrate; an insert extending along a first axis, wherein at least a portion of the insert is embedded in the insulating substrate and integrally connected with the insulating substrate, the portion of the insert embedded in the insulating substrate is provided with a limiting groove, at least two of the limiting grooves extend circumferentially around the insert to form a sealing groove, and at least two of the sealing grooves are provided with an interference fit of a sealing ring.

[0006] Preferably, the radial deformation of each sealing ring gradually increases from the inside to the outside along the insulating substrate.

[0007] Preferably, each of the sealing grooves has the same size, and the outer diameter of each sealing ring gradually increases from the inside to the outside along the insulating substrate.

[0008] Preferably, at least one of the limiting grooves has a limiting plane that contacts the insulating substrate, and the angle between the first axis and the limiting plane is greater than 0 degrees and less than or equal to 90 degrees.

[0009] Preferably, the limiting groove has an opening, a bottom wall, and two oppositely arranged side walls, and the cross-sectional area of ​​the limiting groove 202 gradually increases from the opening to the bottom wall.

[0010] Preferably, the insert includes an insert body and a reinforcing protrusion protruding from the insert body, the limiting groove is disposed on the insert body, and the reinforcing protrusion is embedded in the insulating substrate and connected to the insulating substrate as a whole.

[0011] Preferably, the reinforcing protrusion is disposed on the inner and / or outer peripheral surfaces of the embedded body, and at least a portion of the reinforcing protrusion forms the limiting groove.

[0012] Preferably, at least one of the reinforcing protrusions has a locking plane that contacts the insulating substrate, and the first axis is parallel to the locking plane.

[0013] Preferably, the wall thickness of the insulating substrate is greater than or equal to 3 mm; and / or, a single insulating substrate is connected to two inserts, the two inserts are respectively embedded at both ends of the insulating substrate in the axial direction, and the axial distance between the two inserts is greater than or equal to 3 mm.

[0014] A water heater includes an inner tank, on which an inner tank connector is provided, and the inner tank connector is connected to a water pipe connection structure as described above.

[0015] The beneficial effects of this utility model are:

[0016] The water pipe connection structure for water heater proposed in this utility model has an embedded part extending along a first axis. At least part of the embedded part is embedded in the insulating substrate and connected to the insulating substrate as a whole. The part of the embedded part embedded in the insulating substrate is provided with a limiting groove. At least two limiting grooves extend around the circumference of the embedded part to form a sealing groove. A sealing ring is interference-fitted in at least two sealing grooves to achieve multi-layer protection. Even if a gap occurs between the embedded part and the insulating substrate, the sealing ring can play a sealing role to prevent water leakage and electric shock, and ensure safety in use. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a water pipe connection structure for a water heater provided in Embodiment 1;

[0018] Figure 2 This is a first cross-sectional view of a water pipe connection structure for a water heater provided in this embodiment;

[0019] Figure 3 This is a schematic diagram of the structure of an insert provided in Embodiment 1;

[0020] Figure 4 This is a cross-sectional view of an insert provided in this embodiment;

[0021] Figure 5 This is a second sectional view of the water pipe connection structure for the water heater provided in Embodiment 1;

[0022] Figure 6 This is a schematic diagram of another type of insert provided in this embodiment;

[0023] Figure 7This is a schematic diagram of the structure of the embedding provided in Embodiment 2;

[0024] Figure 8 This is a cross-sectional view of the insert provided in Embodiment 2;

[0025] Figure 9 This is a schematic diagram of the structure of the embedding provided in Embodiment 3;

[0026] Figure 10 This is a cross-sectional view of the insert provided in Embodiment 3;

[0027] Figure 11 This is a schematic diagram of the structure of the embedding provided in Embodiment 4;

[0028] Figure 12 This is a schematic diagram of the structure of an insert provided in Embodiment 5;

[0029] Figure 13 This is a schematic diagram of another type of insert provided in Embodiment 5;

[0030] Figure 14 This is a schematic diagram of the first structure of the water heater provided in Embodiment Six;

[0031] Figure 15 This is a first sectional view of the water heater provided in Embodiment Six;

[0032] Figure 16 yes Figure 15 Partial structural diagram;

[0033] Figure 17 This is a schematic diagram of the second structure of the water heater provided in Embodiment Six;

[0034] Figure 18 This is a second sectional view of the water heater provided in Embodiment Six;

[0035] Figure 19 yes Figure 18 Partial structural diagram;

[0036] Figure 20 This is a schematic diagram of the third structure of the water heater provided in Embodiment Six.

[0037] In the figure: 10, insulating substrate; 11, extension; 20, insert; 201, locking plane; 202, limiting groove; 2021, limiting plane; 21, insert body; 22, reinforcing protrusion; 23, external thread; 30, sealing ring; 100, insulating tube body; 110, tube body; 120, protective sleeve; 130, first tube body; 140, second tube body; 200, water pipe. Detailed Implementation

[0038] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0039] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0040] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0041] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0042] Example 1

[0043] See Figure 1 and Figure 2 This embodiment provides a water pipe connection structure for a water heater, including an insulating substrate 10 and an insert 20. At least part of the insert 20 is embedded in the insulating substrate 10 and is integrally connected to the insulating substrate 10. By connecting the insert 20 to the insulating substrate 10, the water pipe is connected through the insert 20, which provides insulation while ensuring connection strength.

[0044] For example, the insulating substrate 10 is a plastic part, and the insert 20 is a plastic part or a metal part. When the insert 20 is a metal part, the insert 20 and the insulating substrate 10 can be connected as a single unit by injection molding, hot pressing, ultrasonic embedding, or other methods. For example, the metal part is pre-placed in a mold, molten plastic is injected and cooled to form the shape, and the metal and plastic are mechanically interlocked together. When the insert 20 is a plastic part, the materials of the insert 20 and the insulating substrate 10 can be the same or different. For example, the strength of the insert 20 is greater than the strength of the insulating substrate 10, ensuring structural strength while reducing costs. The insert 20 and the insulating substrate 10 can be connected as a single unit by secondary injection molding, ultrasonic welding, laser welding, or other methods.

[0045] A single insulating substrate 10 can be connected to one or more inserts 20. Exemplarily, a single insulating substrate 10 is connected to two inserts 20, with the two inserts 20 respectively embedded at opposite ends of the insulating substrate 10 along its axial direction. The two inserts 20 are designated as a first insert and a second insert, with at least a portion of the first insert embedded at one end of the insulating substrate 10 along its axial direction, and at least a portion of the second insert embedded at the other end of the insulating substrate 10 along its axial direction. Exemplarily, a single insulating substrate 10 is connected to two inserts 20, with the two inserts 20 arranged side-by-side on one side of the insulating substrate 10.

[0046] To ensure water and electricity safety, when both inserts 20 are metal, a safe distance is required between them to ensure insulation. For example, a single insulating substrate 10 connects two inserts 20, with each insert 20 embedded at one end of the axial direction of the insulating substrate 10, and the axial distance between the two inserts 20 is greater than or equal to 3 mm. Figure 2 L represents the axial distance between the two inserts 20. Since the axial distance is greater than or equal to 3mm, even if one insert 20 is charged, it will not be conducted to the other insert 20, thus ensuring insulation and safety.

[0047] In some embodiments, the axial distance between the two inserts 20 is greater than or equal to 5 mm. In some embodiments, the axial distance between the two inserts 20 is equal to 3 mm, 4 mm, 5 mm, or 6 mm.

[0048] To ensure reliability, the wall thickness of the insulating substrate 10 is greater than or equal to 3 mm, which increases its resistance to torsion and pull-out. In some embodiments, the wall thickness of the insulating substrate 10 is greater than or equal to 5 mm. In some embodiments, the wall thickness of the insulating substrate 10 is equal to 3 mm, 4 mm, 5 mm, or 6 mm. Both the insulating substrate 10 and the insert 20 extend along the same axis, and the interior of the insulating substrate 10 forms a channel for water flow. The wall thickness of the insulating substrate 10 is its radial thickness, and a wall thickness of 3 mm or greater means that the radial thickness of the insulating substrate 10 at any location is greater than or equal to 3 mm.

[0049] Optionally, the wall thickness of the insulating substrate 10 is equal to the axial distance between the two inserts 20. This ensures both reliability and safety.

[0050] The insert 20 is a threaded part, which can be an externally threaded part or an internally threaded part. When the insert 20 is an internally threaded part, the insert 20 can be completely embedded in the insulating substrate 10 or partially embedded in the insulating substrate 10. When the insert 20 is an externally threaded part, the insert 20 is partially embedded in the insulating substrate 10.

[0051] For example, the insert 20 includes an external threaded portion 23 located outside the insulating substrate 10. The insulating substrate 10 includes an extension 11, at least a portion of which is disposed on the inner wall of the external threaded portion 23 and extends axially along the external threaded portion 23. The extension 11 extends the effective distance of electrical insulation and reduces the risk of water leakage during subsequent use.

[0052] In some embodiments, one end of the extension 11 extends to the end of the external thread 23 located outside the insulating substrate 10. The end of the extension 11 may be flush with the end of the external thread 23 or may protrude outward relative to the end of the external thread 23. The other end of the extension 11 may extend into the interior of the internal thread member.

[0053] For example, the insert 20 is an externally threaded part, and the externally threaded portion 23 of the insert 20 is located outside the insulating substrate 10. For example, the insert 20 is an internally threaded part, and the insert 20 is completely embedded in the insulating substrate 10. The end of the insert 20 may be flush with the end of the insulating substrate 10, or it may be recessed relative to the end of the insulating substrate 10.

[0054] See Figures 2 to 4The insert 20 extends along the first axis, and at least a portion of the insert 20 is embedded in the insulating substrate 10 and connected to the insulating substrate 10 as a whole. The portion of the insert 20 embedded in the insulating substrate 10 is provided with a limiting groove 202. At least two limiting grooves 202 extend around the circumference of the insert 20 to form a sealing groove. At least two sealing grooves are fitted with sealing rings 30 to achieve multi-layer protection. Even if a gap is generated between the insert 20 and the insulating substrate 10, the sealing rings 30 can play a sealing role to prevent water leakage and electric shock, and ensure safety in use.

[0055] The sealing ring 30 has a certain degree of elasticity, such as being a rubber ring or a soft rubber ring. Therefore, it is easy for the sealing ring 30 to be interference-fitted into the sealing groove. Part of the sealing ring 30 is embedded in the sealing groove, and part of the sealing ring 30 protrudes outside the sealing groove. The processing method of connecting the insulating substrate 10, the insert 20, and the sealing ring 30 into one piece is existing technology, such as secondary injection molding, and will not be elaborated here. Because the pressure during injection molding causes the sealing ring 30 to be compressed, the sealing ring 30 is compressed between the insulating substrate 10 and the insert 20. When a gap is created between the insert 20 and the insulating substrate 10, the sealing ring 30 can use its own elastic recovery deformation to fill the gap, thus achieving a sealing function.

[0056] In some embodiments, the radial deformation of each sealing ring 30 gradually increases from the inside to the outside along the insulating substrate 10. The greater the radial deformation of the sealing ring 30, the better its sealing effect on the gap when it recovers its deformation. Therefore, the sealing performance of each sealing ring 30 gradually increases from the inside to the outside along the insulating substrate 10 to prevent water leakage and electric shock, thus ensuring safety in use.

[0057] The cross-sectional shape, cross-sectional area, inner diameter, outer diameter, and other dimensional parameters of each sealing groove can be the same or different. In some embodiments, the dimensions of each sealing groove are the same, which facilitates processing and production. For example, the dimensions of each sealing groove are the same, and the outer diameter of each sealing ring 30 gradually increases from the inside to the outside along the insulating substrate 10. Therefore, the radial deformation of each sealing ring 30 gradually increases.

[0058] The cross-sectional shape of the sealing ring 30 can be the same as that of the sealing groove, so that the sealing ring 30 can fully fill the sealing groove. For example, both the cross-sectional shape of the sealing ring 30 and the cross-sectional shape of the sealing groove can be trapezoidal or rectangular. For example, the cross-sectional shape of the sealing groove is semi-circular, and the cross-sectional shape of the sealing ring 30 is circular.

[0059] In some embodiments, the sealing ring 30 has a sealing plane that contacts the insulating substrate 10, providing both sealing and anti-torsion or anti-pull-out function. Exemplarily, the angle between the first axis and the sealing plane is greater than or equal to 0 degrees and less than 90 degrees. When the insert 20 is subjected to torque, the sealing plane can abut against the insulating substrate 10 to provide anti-torsion function.

[0060] In some embodiments, the first axis is parallel to the sealing plane. In some embodiments, the outer peripheral surface of the sealing ring 30 is provided with at least two sealing planes, which are arranged at an included angle.

[0061] Since the sealing ring 30 protrudes from the sealing groove and contacts the insulating substrate 10, it provides a certain degree of pull-out resistance. Furthermore, at least one limiting groove 202 has a limiting plane 2021 that contacts the insulating substrate 10, and the angle between the first axis and the limiting plane 2021 is greater than 0 degrees and less than or equal to 90 degrees. When the insert 20 is subjected to a pull-out force, the insert 20 tends to move along the first axis. Because the angle between the first axis and the limiting plane 2021 is greater than 0 degrees and less than or equal to 90 degrees, and the limiting plane 2021 contacts the insulating substrate 10, the limiting plane 2021 presses against the insulating substrate 10, increasing structural strength while preventing the insert 20 from moving relative to the insulating substrate 10, avoiding gaps between the insert 20 and the insulating substrate 10, preventing water leakage and electric shock, and ensuring safety in use.

[0062] When at least two limiting grooves 202 serve as sealing grooves, and at least one limiting groove 202 has a limiting plane 2021, the insert 20 includes at least three limiting grooves 202. For example, the insert 20 includes three limiting grooves 202, wherein two limiting grooves 202 extend circumferentially around the insert 20 to form sealing grooves, and a sealing ring 30 is interference-fitted within the sealing grooves, and the third limiting groove 202 has a limiting plane 2021 that contacts the insulating substrate 10.

[0063] For example, limiting grooves 202 are provided on both the inner and outer peripheral surfaces of the insert 20, and the number of limiting grooves 202 can be selectively set according to the axial length of the insert 20. Each limiting groove 202 is embedded in the insulating substrate 10 to increase the contact area with the insulating substrate 10 and increase the structural strength.

[0064] The angle between the first axis and the limiting plane 2021 is greater than 0 degrees and less than or equal to 90 degrees. When the insert 20 is subjected to a pull-out force, the pull-out force acts perpendicularly to the limiting plane 2021, or a component of the pull-out force acts perpendicularly to the limiting plane 2021, so that the limiting plane 2021 abuts against the insulating substrate 10, thereby increasing the structural strength and preventing the insert 20 from moving relative to the insulating substrate 10.

[0065] The limiting groove 202 has an opening, a bottom wall, and two oppositely arranged side walls. The bottom wall is opposite to the opening, and at least one side wall serves as the limiting plane 2021. The angle between the side wall and the bottom wall is greater than 0 degrees and less than or equal to 90 degrees. Exemplarily, the cross-sectional shape of the limiting groove 202 is rectangular, trapezoidal, or an irregular quadrilateral. When two or more limiting grooves 202 are provided, the cross-sectional shapes of each limiting groove 202 can be the same or different.

[0066] For example, the cross-sectional area of ​​the limiting groove 202 gradually increases from the groove opening to the bottom wall, that is, the limiting groove 202 gradually widens, which can further improve the tensile strength and fully lock with the insulating substrate 10 to prevent the insulating substrate 10 from deforming. This can better realize the combination between the insulating substrate 10 and the insert 20 and achieve a better sealing effect.

[0067] See Figures 2 to 5 The insert 20 includes an insert body 21 and a reinforcing protrusion 22 protruding from the insert body 21. The insert body 21 extends along a first axis, and the reinforcing protrusion 22 is embedded in the insulating substrate 10 and integrally connected with the insulating substrate 10. By providing the reinforcing protrusion 22 on the insert body 21, the contact area between the insert 20 and the insulating substrate 10 is increased, thereby enhancing the structural strength.

[0068] In this embodiment, a limiting groove 202 is disposed on the embedded body 21. The limiting groove 202 and the reinforcing protrusion 22 are disposed independently. Exemplarily, the reinforcing protrusion 22 is disposed at the end of the embedded body 21, and the limiting groove 202 is disposed on the inner peripheral surface and / or outer peripheral surface of the embedded body 21.

[0069] like Figure 3 As shown, the reinforcing protrusion 22 is disposed at the end of the embedded body 21, extending the length of the embedded body 21 and increasing the distance between the embedded body 21 and the insulating substrate 10. One, two, or more reinforcing protrusions 22 may be provided. When two or more reinforcing protrusions 22 are provided, each reinforcing protrusion 22 is spaced apart circumferentially around the embedded body 21.

[0070] The structural shape of the reinforcing protrusion 22 can be set according to actual needs. The structural shape of the reinforcing protrusion 22 can be, for example, a cylinder, a cuboid, a hemisphere, or an irregular shape.

[0071] At least one reinforcing protrusion 22 has a locking plane 201 that contacts the insulating substrate 10, and the first axis is parallel to the locking plane 201. When the insert 20 is subjected to torque, the insert 20 tends to rotate about the first axis. Since the first axis is parallel to the locking plane 201 and the locking plane 201 is in contact with the insulating substrate 10, the locking plane 201 presses against the insulating substrate 10 when the insert 20 is subjected to torque. This increases the structural strength while preventing the insert 20 from rotating relative to the insulating substrate 10, avoiding gaps between the insert 20 and the insulating substrate 10, preventing water leakage and electric shock, and ensuring safety in use.

[0072] Figure 5 In the diagram, the arc-shaped arrow M indicates the direction of the torque applied to the insert 20, and the straight arrow F indicates the direction of the tangential force generated by the torque. Figure 3 The first axis is represented by a straight line O1. When the insert 20 is subjected to torque, the instantaneous direction of motion of any point on the surface of the insert 20 is the tangential direction at that point. The instantaneous direction of motion of at least one point is perpendicular to the locking plane 201, and the tangential force generated by the torque is perpendicular to the locking plane 201, so that the locking plane 201 presses against the insulating substrate 10 to prevent the insert 20 from twisting relative to the insulating substrate 10.

[0073] For example, the first axis is spaced apart from the locking plane 201, which facilitates the layout of the locking plane 201, aids in manufacturing, and reduces costs. The distance between the first axis and the locking plane 201 can be set according to actual needs. The area of ​​the locking plane 201 can also be set according to actual needs; the larger the area of ​​the locking plane 201, the stronger its anti-torsion effect.

[0074] By setting the locking plane 201 as a planar structure, the contact area with the insulating substrate 10 can be increased, ensuring that the locking plane 201 can effectively prevent torsion. In some embodiments, the locking plane 201 is provided with locking protrusions and / or locking grooves to further increase the contact area with the insulating substrate 10 and improve the anti-torsion effect. For example, the locking plane 201 is provided with multiple locking protrusions, and the extension directions of each locking protrusion can be the same or different.

[0075] For an insert 20, there may be one, two, or more locking planes 201. When there are two or more locking planes 201, they may be parallel to each other or at an angle. For example, having at least two locking planes 201 at an angle can further improve the anti-torsion effect.

[0076] The locking plane 201 can be disposed on the side of the reinforcing protrusion 22. For example, the locking plane 201 can be disposed on the side of the reinforcing protrusion 22 close to the first axis, or the locking plane 201 can be disposed on the side of the reinforcing protrusion 22 away from the first axis, or the locking plane 201 can be disposed on the side where adjacent reinforcing protrusions 22 are close to each other.

[0077] For example, the reinforcing protrusion 22 is disposed at the end or outer peripheral surface of the embedded body 21, and the locking plane 201 is disposed on the side of the reinforcing protrusion 22 away from the first axis. For example, the reinforcing protrusion 22 is disposed at the end or inner peripheral surface of the embedded body 21, and the locking plane 201 is disposed on the side of the reinforcing protrusion 22 close to the first axis.

[0078] When there are two or more reinforcing protrusions 22, at least one reinforcing protrusion 22 is provided with a locking plane 201. A single reinforcing protrusion 22 may have one locking plane 201, or it may have two or more locking planes 201. For example... Figure 3 As shown, each reinforcing protrusion 22 is provided with a locking plane 201, some reinforcing protrusions 22 are provided with one locking plane 201, and some reinforcing protrusions 22 are provided with two locking planes 201.

[0079] When there are two or more reinforcing protrusions 22, the structural shapes of each reinforcing protrusion 22 can be the same or different. For example Figure 3 As shown, the insert 20 includes six reinforcing protrusions 22, two of which have the same structural shape, and the remaining four reinforcing protrusions 22 have the same structural shape. Figure 6 As shown, the insert 20 includes eight reinforcing protrusions 22, all of which have the same structural shape.

[0080] Example 2

[0081] Figure 7 and Figure 8 Embodiment 2 is shown, wherein components that are the same as or corresponding to those in Embodiment 1 are referred to using the same reference numerals as those in Embodiment 1. For simplicity, only the differences between Embodiment 2 and Embodiment 1 are described. The difference is that multiple reinforcing protrusions 22 are provided, and the multiple reinforcing protrusions 22 are all provided on the inner peripheral surface of the embedded body 21 and are spaced apart circumferentially around the embedded body 21. By providing the reinforcing protrusions 22 on the inner peripheral surface of the embedded body 21, the local wall thickness of the embedded body 21 is increased, the structural strength is increased, and the axial length of the embedded body 21 is reduced compared to Embodiment 1 to prevent the two embedded members 20 on the insulating substrate 10 from interfering with each other.

[0082] The locking plane 201 can be located on the side of the reinforcing protrusion 22 that is close to the first axis, or the locking plane 201 can be located on the side of adjacent reinforcing protrusions 22 that are close to each other.

[0083] Example 3

[0084] Figure 9 and Figure 10 Embodiment 3 is shown, wherein components that are the same as or corresponding to those in Embodiment 1 are referred to using the same reference numerals as those in Embodiment 1. For simplicity, only the differences between Embodiment 3 and Embodiment 1 are described. The difference is that, for a single reinforcing protrusion 22, a portion of the reinforcing protrusion 22 is located at the end of the embedded body 21, and a portion of the reinforcing protrusion 22 is located on the inner circumferential surface of the embedded body 21. This ensures that the embedded member 20 has sufficient length to fully contact the insulating substrate 10, while also increasing the local wall thickness of the embedded body 21 to ensure the structural strength of the embedded member 20.

[0085] In other embodiments, the reinforcement protrusion 22 may have a portion located at the end of the embedded body 21, a portion located on the inner circumferential surface of the embedded body 21, and a portion located on the outer circumferential surface of the embedded body 21. Alternatively, for a single reinforcement protrusion 22, a portion may be located at the end of the embedded body 21, and a portion located on the outer circumferential surface of the embedded body 21.

[0086] Multiple reinforcing protrusions 22 are provided. These multiple reinforcing protrusions 22 can be consistent. For example, for a single reinforcing protrusion 22, a portion of the reinforcing protrusion 22 is located at the end of the embedded body 21, and a portion of the reinforcing protrusion 22 is located on the inner circumferential surface of the embedded body 21. The multiple reinforcing protrusions 22 can also be non-consistent. For example, for one reinforcing protrusion 22, a portion of the reinforcing protrusion 22 is located at the end of the embedded body 21, and a portion of the reinforcing protrusion 22 is located on the inner circumferential surface of the embedded body 21, while for another reinforcing protrusion 22, the reinforcing protrusion 22 is located at the end of the embedded body 21.

[0087] Example 4

[0088] Figure 11 Embodiment 4 is shown, in which components that are the same as or corresponding to those in Embodiment 1 are represented by the same reference numerals as those in Embodiment 1. For simplicity, only the differences between Embodiment 4 and Embodiment 1 are described. The difference is that both the limiting groove 202 and the reinforcing protrusion 22 are provided on the outer peripheral surface of the embedded body 21. The limiting groove 202 is concave relative to the outer peripheral surface of the embedded body 21, and the reinforcing protrusion 22 is convex relative to the outer peripheral surface of the embedded body 21. The limiting groove 202 and the reinforcing protrusion 22 are independently provided, and their layout does not affect each other, which facilitates processing and production.

[0089] Multiple reinforcing protrusions 22 can be provided, and the multiple reinforcing protrusions 22 are arranged in multiple rings around the outer peripheral surface of the embedded body 21, with a limiting groove 202 provided between two adjacent rings of reinforcing protrusions 22. The locking plane 201 can be provided on the outer peripheral surface or side of the reinforcing protrusion 22.

[0090] Example 5

[0091] Figure 12 and Figure 13 Embodiment 5 is shown, wherein components that are the same as or corresponding to those in Embodiment 1 are referred to using the same reference numerals as those in Embodiment 1. For simplicity, only the differences between Embodiment 5 and Embodiment 1 are described. The difference is that the reinforcing protrusion 22 is disposed on the inner and / or outer peripheral surfaces of the embedded body 21, and at least part of the reinforcing protrusion 22 forms a limiting groove 202. The limiting groove 202 and the reinforcing protrusion 22 cooperate with each other to ensure structural compactness.

[0092] like Figure 12 As shown, the reinforcing protrusions 22 are arranged in a ring around the outer peripheral surface of the embedded body 21, and a limiting groove 202 is formed between adjacent reinforcing protrusions 22. The locking plane 201 is disposed on the side of the reinforcing protrusion 22 away from the first axis. Each reinforcing protrusion 22 may have one locking plane 201 or multiple locking planes 201. For example, each reinforcing protrusion 22 may have six locking planes 201, making the outer peripheral surface of the reinforcing protrusion 22 hexagonal.

[0093] like Figure 13 As shown, some reinforcing protrusions 22 extend circumferentially around the embedded body 21, and some reinforcing protrusions 22 extend axially parallel to the embedded body 21, so that the reinforcing protrusions 22 intersect to form an arc-shaped limiting groove 202. This ensures structural compactness.

[0094] Example 6

[0095] See Figures 14 to 20 This embodiment provides a water heater, including an inner tank with an inner tank connector. The inner tank connector is connected to a water heater water pipe connection structure as described in any of the above embodiments. By using the aforementioned water heater water pipe connection structure in a water heater, the locking plane 201 increases structural strength while preventing the insert 20 from rotating relative to the insulating substrate 10, avoiding gaps between the insert 20 and the insulating substrate 10, thus preventing water leakage and electric shock, and ensuring safety during use.

[0096] For example, such as Figures 14 to 19 As shown, the insulating substrate 10 is provided with two inserts 20, namely the first insert and the second insert. The second insert is an internally threaded part used to connect the inner tank connector, and the first insert is an externally threaded part used to connect the water inlet pipe or the water outlet pipe of the water heater.

[0097] The axial distance between the first and second inserts is greater than or equal to 3mm. Even if the inner tank of the water heater leaks electricity, the second insert is conductive. Since the second insert is an internally threaded part, it is completely embedded in the insulating substrate 10, so there is no risk of personnel touching it.

[0098] The water heater also includes an insulating tube 100, one end of which passes through an internal threaded fitting and connects to an insulating base 10, with the insulating tube 100 and the insulating base 10 in communication. When the internal threaded fitting is connected to the inner tank connector, the insulating tube 100 is inserted into the inner tank. The insulating water column inside the insulating tube 100 creates a significant resistance. Utilizing the principle of voltage division, the voltage conducted by the water inside the water heater can be reduced to below a safe voltage. When the water inside the inner tank is electrified, the voltage can be reduced to below a safe voltage through the insulating water column, thus ensuring that the water outlet voltage of the water heater is below a safe voltage and guaranteeing the user's water safety.

[0099] The insulating tube 100 and the insulating substrate 10 can be connected by threads or injection molding. For example... Figure 16 As shown, the insulating tube 100 includes a tube body 110 and a protective sleeve 120 sleeved on the outside of the tube body 110. The tube body 110 is connected to the insulating substrate 10. Figure 19 As shown, the insulating tube 100 includes a first tube 130 and a second tube 140. The first tube 130 is connected to the insulating substrate 10, and the second tube 140 is connected to the first tube 130, which facilitates processing and production. A protective sleeve 120 can be fitted onto the outside of the second tube 140.

[0100] For example, such as Figure 20 As shown, the water heater also includes a water pipe 200, and an insert 20 is provided on the insulating substrate 10. The insert 20 is an externally threaded part. The water pipe 200 is connected to the insulating substrate 10 so that the end of the water pipe 200 has an externally threaded part, which facilitates the connection of the water pipe 200 to other components.

[0101] The above embodiments merely illustrate the basic principles and characteristics of this utility model. This utility model is not limited to the above embodiments. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A water pipe connection structure for a water heater, characterized in that, include: Insulating substrate (10); An insert (20) extends along a first axis, at least a portion of the insert (20) is embedded in the insulating substrate (10) and is integrally connected with the insulating substrate (10). The portion of the insert (20) embedded in the insulating substrate (10) is provided with a limiting groove (202). At least two of the limiting grooves (202) extend circumferentially around the insert (20) to form a sealing groove. A sealing ring (30) is interference-fitted into at least two of the sealing grooves.

2. The water pipe connection structure for a water heater according to claim 1, characterized in that, Along the insulating substrate (10) from the inside out, the radial deformation of each of the sealing rings (30) gradually increases.

3. The water pipe connection structure for a water heater according to claim 2, characterized in that, Each of the sealing grooves has the same size, and the outer diameter of each sealing ring (30) gradually increases from the inside to the outside along the insulating substrate (10).

4. The water pipe connection structure for a water heater according to claim 1, characterized in that, At least one of the limiting grooves (202) has a limiting plane (2021) that contacts the insulating substrate (10), and the angle between the first axis and the limiting plane (2021) is greater than 0 degrees and less than or equal to 90 degrees.

5. The water pipe connection structure for a water heater according to claim 4, characterized in that, The limiting groove (202) has a groove opening, a bottom wall, and two oppositely arranged side walls. The cross-sectional area of ​​the limiting groove (202) gradually increases from the groove opening to the bottom wall.

6. The water pipe connection structure for a water heater according to claim 1, characterized in that, The insert (20) includes an insert body (21) and a reinforcing protrusion (22) protruding from the insert body (21). The limiting groove (202) is disposed on the insert body (21). The reinforcing protrusion (22) is embedded in the insulating substrate (10) and is connected to the insulating substrate (10) as a whole.

7. The water pipe connection structure for a water heater according to claim 6, characterized in that, The reinforcing protrusion (22) is disposed on the inner and / or outer peripheral surfaces of the embedded body (21), and at least a portion of the reinforcing protrusion (22) forms the limiting groove (202).

8. The water pipe connection structure for a water heater according to claim 6, characterized in that, At least one of the reinforcing protrusions (22) has a locking plane (201) that contacts the insulating substrate (10), and the first axis is parallel to the locking plane (201).

9. The water pipe connection structure for a water heater according to any one of claims 1-8, characterized in that, The wall thickness of the insulating substrate (10) is greater than or equal to 3 mm; and / or, a single insulating substrate (10) connects two inserts (20), the two inserts (20) are respectively embedded at both ends of the axial direction of the insulating substrate (10), and the axial distance between the two inserts (20) is greater than or equal to 3 mm.

10. A water heater, comprising an inner tank, wherein an inner tank connector is provided on the inner tank, characterized in that, The inner tank connector is connected to a water pipe connection structure for a water heater as described in any one of claims 1-9.

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