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, and belongs to water heater technical field, water pipe connecting structure for water heater includes insulating base body and embedded part, and the embedded part includes embedded body and the reinforcing protrusion of setting on embedded body, and embedded body extends along the first axis, and reinforcing protrusion embeds insulating base body and is connected as a whole with insulating base body, and at least one reinforcing protrusion has the locking plane of contact with insulating base body, and the first axis is parallel with locking plane and interval arrangement. The water heater includes the inner bag, is provided with the inner bag joint on the inner bag, and the water pipe connecting structure for water heater is connected on the inner bag joint. When embedded part is under the action of torque, locking plane abuts against insulating base body, prevents embedded part from rotating relative to insulating base body while increasing structural strength, avoids the gap between embedded part and insulating base body, prevents water leakage and prevents electric shock, and guarantees the 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 a threaded metal part embedded in a plastic screw head, used for water pipe installation and connection. However, the plastic screw head's strength decreases over time due to thermal shock, natural aging, or external impacts. Since the metal part is often a rotating body, when subjected to significant torque, it tends to rotate relative to the plastic screw head. This can cause the metal part to separate from the plastic screw head, creating a gap and potentially leading to 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 the rotation of the metal part relative to the plastic screw head causes the metal part to peel off from the plastic screw head, creating a gap.

[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 including an insert body and a reinforcing protrusion protruding from the insert body, the insert body extending along a first axis, the reinforcing protrusion being embedded in the insulating substrate and integrally connected with the insulating substrate, at least one of the reinforcing protrusions having a locking plane in contact with the insulating substrate, and the first axis being parallel to and spaced apart from the locking plane.

[0006] Preferably, at least two locking planes are provided, and the at least two locking planes are arranged at an angle.

[0007] Preferably, for a single reinforcing protrusion, a portion of the reinforcing protrusion is located at the end of the embedded body, and a portion of the reinforcing protrusion is located on the inner and / or outer peripheral surfaces of the embedded body.

[0008] Preferably, the reinforcing protrusion is disposed at the end or outer peripheral surface of the embedded body, and the locking plane is disposed on the side of the reinforcing protrusion away from the first axis.

[0009] Preferably, the reinforcing protrusion is disposed at the end or inner circumferential surface of the embedded body, and the locking plane is disposed on the side of the reinforcing protrusion near the first axis.

[0010] Preferably, a limiting groove is provided on the inner and / or outer peripheral surfaces of the embedded body, the limiting groove having 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.

[0011] Preferably, there are multiple reinforcing protrusions, and at least some of the reinforcing protrusions form the limiting groove.

[0012] Preferably, the reinforcing protrusions are arranged in a ring around the outer peripheral surface of the embedded body, and the limiting grooves are formed between adjacent reinforcing protrusions.

[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 as follows: The water pipe connection structure for water heaters proposed in this utility model includes an insert body and reinforcing protrusions protruding from the insert body. The insert body extends along a first axis, and the reinforcing protrusions are embedded in and integrally connected to the insulating substrate. At least one reinforcing protrusion has a locking plane that contacts the insulating substrate. The first axis is parallel to and spaced apart from the locking plane. When the insert is subjected to torque, it tends to rotate around the first axis. Since the first axis is parallel to the locking plane and the locking plane contacts the insulating substrate, the locking plane presses against the insulating substrate when the insert is subjected to torque. This increases structural strength while preventing the insert from rotating relative to the insulating substrate, avoiding gaps between the insert and the insulating substrate, preventing water leakage and electric shock, and ensuring safety in use. The spaced arrangement of the first axis and the locking plane facilitates the setting of the locking plane's position and facilitates manufacturing. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the water pipe connection structure for the water heater provided in Embodiment 1;

[0017] Figure 2 This is a first cross-sectional view of the water pipe connection structure for the water heater provided in this embodiment.

[0018] Figure 3 This is a second sectional view of the water pipe connection structure for the water heater provided in Embodiment 1;

[0019] Figure 4This is a schematic diagram of the structure of the embedding provided in Embodiment 1;

[0020] Figure 5 This is a cross-sectional view of the embedding provided in Embodiment 1;

[0021] Figure 6 This is a schematic diagram of the structure of the embedding provided in Embodiment 2;

[0022] Figure 7 This is a cross-sectional view of the insert provided in Embodiment 2;

[0023] Figure 8 This is a schematic diagram of the structure of the embedding provided in Embodiment 3;

[0024] Figure 9 This is a cross-sectional view of the insert provided in Embodiment 3;

[0025] Figure 10 This is a schematic diagram of the structure of the embedding provided in Embodiment 4;

[0026] Figure 11 This is a schematic diagram of the structure of an insert provided in Embodiment 5;

[0027] Figure 12 This is a schematic diagram of another type of insert provided in Embodiment 5;

[0028] Figure 13 This is a schematic diagram of the structure of the embedding provided in Embodiment Six;

[0029] Figure 14 This is a cross-sectional view of the insert provided in Embodiment Six;

[0030] Figure 15 This is a schematic diagram of the first structure of the water heater provided in Embodiment Seven;

[0031] Figure 16 This is a first sectional view of the water heater provided in Embodiment Seven;

[0032] Figure 17 yes Figure 16 Partial structural diagram;

[0033] Figure 18 This is a schematic diagram of the second structure of the water heater provided in Embodiment Seven;

[0034] Figure 19 This is a second sectional view of the water heater provided in Embodiment Seven;

[0035] Figure 20 yes Figure 19 Partial structural diagram;

[0036] Figure 21This is a schematic diagram of the third structure of the water heater provided in Embodiment 7.

[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 Figures 1 to 4This embodiment provides a water pipe connection structure for a water heater, including an insulating substrate 10 and an insert 20. 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. The reinforcing protrusion 22 is embedded in the insulating substrate 10 and is connected to the insulating substrate 10 as a whole. At least one reinforcing protrusion 22 has a locking plane 201 that contacts the insulating substrate 10. The first axis is parallel to and spaced apart from the locking plane 201.

[0044] By providing reinforcing protrusions 22 on the embedded body 21, the contact area between the embedded member 20 and the insulating substrate 10 is increased, enhancing structural strength. When the embedded member 20 is subjected to torque, it tends to rotate around 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 embedded member 20 is subjected to torque. This increases structural strength while preventing the embedded member 20 from rotating relative to the insulating substrate 10, avoiding gaps between the embedded member 20 and the insulating substrate 10, preventing water leakage and electric shock, and ensuring safety in use. The first axis and the locking plane 201 are spaced apart, facilitating the setting of the position of the locking plane 201 and simplifying manufacturing.

[0045] By connecting the insert 20 to the insulating substrate 10, and connecting it to the water pipe through the insert 20, the connection strength is ensured while providing insulation.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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 the radial thickness of the insulating substrate 10, and the wall thickness of the insulating substrate 10 is greater than or equal to 3 mm, that is, the radial thickness of the insulating substrate 10 at any position is greater than or equal to 3 mm.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] The first axis is parallel to the locking plane 201. When the insert 20 is subjected to torque, the instantaneous direction of movement of any point on the surface of the insert 20 is the tangential direction at that point. The tangential force generated by the torque is perpendicular to the locking plane 201, causing the locking plane 201 to press against the insulating substrate 10.

[0058] Figure 3 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 4 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] Reinforcing protrusions 22 are provided at the ends, inner circumferential surfaces, and / or outer circumferential surfaces of the embedded body 21. For example... Figure 4 As shown, the reinforcing protrusion 22 is provided at the end of the embedded body 21, which extends the length of the embedded body 21 and increases the distance between the embedded body 21 and the insulating substrate 10.

[0063] The reinforcing protrusion 22 can be provided as one, two, or more. When there are two or more reinforcing protrusions 22, each reinforcing protrusion 22 can be located at the same position on the embedded body 21, for example, all of them can be located on the outer peripheral surface of the embedded body 21; alternatively, the reinforcing protrusions 22 can be distributed at one, two, or more positions on the embedded body 21, for example, at least one reinforcing protrusion 22 can be located at the end of the embedded body 21, at least one reinforcing protrusion 22 can be located on the inner peripheral surface of the embedded body 21, and at least one reinforcing protrusion 22 can be located on the outer peripheral surface of the embedded body 21. Figure 4 As shown, multiple reinforcing protrusions 22 are provided, and the multiple reinforcing protrusions 22 are arranged circumferentially around the end of the embedded body 21.

[0064] 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. The locking plane 201 is set so that at least part of the surface of the reinforcing protrusion 22 is planar, and the remaining part can be either planar or curved.

[0065] 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.

[0066] 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.

[0067] 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 4 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.

[0068] 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 4 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.

[0069] See Figure 4 and Figure 5 A limiting groove 202 is provided on the inner and / or outer peripheral surfaces of the embedded body 21. The limiting groove 202 has a limiting plane 2021 that contacts the insulating substrate 10. 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 embedded part 20 is subjected to a pull-out force, the embedded part 20 has a tendency to move along the first axis. Since 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 is in contact with the insulating substrate 10, the limiting plane 2021 presses against the insulating substrate 10. This increases the structural strength while preventing the embedded part 20 from moving relative to the insulating substrate 10, avoiding gaps between the embedded part 20 and the insulating substrate 10, preventing water leakage and electric shock, and ensuring safety in use.

[0070] 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.

[0071] 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.

[0072] The limiting groove 202 has an opening, a bottom wall, and two side walls. The bottom wall is positioned opposite 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. For example, 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.

[0073] 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.

[0074] The locking plane 201 is set on the reinforcing protrusion 22, and the limiting groove 202 is set on the embedded body 21. The layout of the two does not affect each other, which facilitates processing and production.

[0075] Example 2

[0076] Figure 6 and Figure 7 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.

[0077] 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.

[0078] Example 3

[0079] Figure 8 and Figure 9Embodiment 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.

[0080] 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.

[0081] 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.

[0082] Example 4

[0083] Figure 10 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.

[0084] 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.

[0085] Example 5

[0086] Figure 11 and Figure 12 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 multiple reinforcing protrusions 22 are provided, and at least some of the reinforcing protrusions 22 form a limiting groove 202. The limiting groove 202 and the reinforcing protrusions 22 cooperate with each other to ensure structural compactness.

[0087] like Figure 11 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.

[0088] like Figure 12 As shown, some of the reinforcing protrusions 22 extend circumferentially around the embedded body 21, and some of the reinforcing protrusions 22 extend parallel to the axial direction of the embedded body 21, so that the reinforcing protrusions 22 intersect to form a limiting groove 202, ensuring structural compactness.

[0089] Example 6

[0090] Figure 13 and Figure 14 Embodiment Six is ​​shown, wherein components that are the same as or corresponding to those in Embodiment One are referred to using the same reference numerals as those in Embodiment One. For simplicity, only the differences between Embodiment Six and Embodiment One are described. The difference is that a limiting groove 202 is provided on the embedded body 21, the limiting groove 202 is embedded in the insulating substrate 10, at least one limiting groove 202 extends circumferentially around the embedded body 21 to form a sealing groove, and a sealing ring 30 is provided in at least one sealing groove. By providing the sealing ring 30, the sealing performance between the embedded body 21 and the insulating substrate 10 is increased, and even if a gap occurs between the embedded body 21 and the insulating substrate 10, the sealing performance of the sealing ring 30 can prevent water leakage from the gap.

[0091] When multiple limiting grooves 202 are provided on the embedded body 21, at least one limiting groove 202 extends in an annular shape around the circumference of the embedded member 20 to form a sealing groove, and the other limiting grooves 202 can extend along the axial direction of the embedded body 21 or extend in an arc shape around the circumference of the embedded member 20.

[0092] When multiple limiting grooves 202 extend circumferentially around the insert 20 to form multiple sealing grooves, at least one sealing groove is provided with a sealing ring 30. For example, a sealing groove near the end of the insulating substrate 10 is provided with a sealing ring 30.

[0093] The sealing ring 30 is interference-fitted with the sealing groove. The cross-sectional shape of the sealing ring 30 and the cross-sectional shape of the sealing groove can be the same or different, as long as the interference fit between the sealing ring 30 and the sealing groove can be achieved to achieve the sealing function.

[0094] For example, the sealing groove has a rectangular cross-sectional shape, and the sealing ring 30 has a circular cross-sectional shape. For example, the sealing groove has a trapezoidal cross-sectional shape, and the sealing ring 30 has a trapezoidal cross-sectional shape.

[0095] 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.

[0096] 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.

[0097] It is understood that the above embodiments can be selectively combined as needed, provided that the combination of these technical features does not contradict each other. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. These embodiments not explicitly written should also be considered to be within the scope of this specification.

[0098] In the above-mentioned water pipe connection structure for water heater, the insert 20 is embedded in the insulating substrate 10. By optimizing the structure of the insert 20, the connection strength between the insert 20 and the insulating substrate 10 is increased, and the insulation performance is good.

[0099] Example 7

[0100] See Figures 15 to 21 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.

[0101] For example, such as Figures 15 to 20As 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.

[0102] 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.

[0103] 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.

[0104] The insulating tube 100 and the insulating substrate 10 can be connected by threads or injection molding. For example... Figure 17 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 20 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.

[0105] For example, such as Figure 21 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.

[0106] 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) 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. The reinforcing protrusion (22) is embedded in the insulating substrate (10) and is integrally connected with the insulating substrate (10). At least one of the reinforcing protrusions (22) has a locking plane (201) that contacts the insulating substrate (10). The first axis is parallel to and spaced apart from the locking plane (201).

2. The water pipe connection structure for a water heater according to claim 1, characterized in that, At least two locking planes (201) are provided, and at least two locking planes (201) are arranged at an angle.

3. The water pipe connection structure for a water heater according to claim 1, characterized in 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 and / or outer peripheral surfaces of the embedded body (21).

4. The water pipe connection structure for a water heater according to claim 1, characterized in that, 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.

5. The water pipe connection structure for a water heater according to claim 1, characterized in that, The reinforcing protrusion (22) is disposed at the end or inner circumferential surface of the embedded body (21), and the locking plane (201) is disposed on the side of the reinforcing protrusion (22) near the first axis.

6. The water pipe connection structure for a water heater according to claim 1, characterized in that, The inner and / or outer circumferential surfaces of the embedded body (21) are provided with limiting grooves (202), the limiting grooves (202) have limiting planes (2021) that contact the insulating substrate (10), and the angle between the first axis and the limiting planes (2021) is greater than 0 degrees and less than or equal to 90 degrees.

7. The water pipe connection structure for a water heater according to claim 6, characterized in that, The reinforcing protrusions (22) are provided in multiple forms, and at least a portion of the reinforcing protrusions (22) surround the limiting groove (202).

8. The water pipe connection structure for a water heater according to claim 7, characterized in that, The reinforcing protrusions (22) are arranged in a ring around the outer peripheral surface of the embedded body (21), and the limiting grooves (202) are formed between adjacent reinforcing protrusions (22).

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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