Water pipe connecting structure for water heater and water heater

Abstract

The invention discloses a water pipe connecting structure for a water heater and the water heater, and belongs to the technical field of water heaters, the water pipe connecting structure for the water heater comprises an insulating base body and an embedded part, at least part of the embedded part is embedded into the insulating base body and connected with the insulating base body into a whole, and the embedded part is provided with a locking plane making contact with the insulating base body. The locking plane is used for abutting against the insulating base body when the embedded part is subjected to torque. The water heater comprises an inner container, an inner container connector is arranged on the inner container, and the water pipe connecting structure for the water heater is connected to the inner container connector. When the embedded part is subjected to the action of torque, the embedded part has the movement tendency of rotating around the axis of the embedded part, and the locking plane is in contact with the insulating base body and abuts against the insulating base body, so that the structural strength is improved, the embedded part is prevented from rotating relative to the insulating base body, a gap is prevented from being generated between the embedded part and the insulating base body, and water leakage and electric shock are prevented; and the use safety is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of water heaters, and in particular to a water heater water pipe connection structure and a water heater. Background Art

[0002] Currently, most water heaters utilize anti-electric wall technology, of which insulating joints are a key component. These joints consist of a threaded metal component embedded in a plastic screw head, used for pipe installation and connection. Plastic screw heads are subject to thermal shock, natural aging, and external impact, leading to reduced strength over time. Metal parts are often rotating bodies. When subjected to significant torque, they tend to rotate relative to the plastic screw head, causing the metal parts to separate from the plastic screw head, creating a gap. This can lead to water leakage and even the risk of electric shock, posing a safety hazard. Summary of the Invention

[0003] The present invention provides a water pipe connection structure for a water heater and a water heater, so as to solve the technical problem in the prior art that a metal part rotates relative to a plastic screw head, causing the metal part and the plastic screw head to peel off and form a gap.

[0004] As conceived above, the technical solution adopted by the present invention is:

[0005] A water pipe connection structure for a water heater includes: an insulating base; an insert, at least a portion of which is embedded in the insulating base and connected to the insulating base as a whole; the insert has a locking plane in contact with the insulating base, and the locking plane is used to press against the insulating base when the insert is subjected to torque.

[0006] Preferably, the angle between the locking plane and the radial cross section of the insert is greater than 0 degrees and less than or equal to 90 degrees.

[0007] Preferably, the locking plane is perpendicular to the radial cross section of the insert, and the locking plane is spaced apart from the axis of the insert.

[0008] Preferably, the insert comprises an insert body and a reinforcement protrusion protruding from the insert body, and the insert body and / or the reinforcement protrusion are provided with a locking plane.

[0009] Preferably, the reinforcing protrusion is arranged at the end, inner circumference and / or outer circumference of the embedded body; or, for a single reinforcing protrusion, part of the reinforcing protrusion is located at the end of the embedded body, and part of the reinforcing protrusion is located at the inner circumference and / or outer circumference of the embedded body.

[0010] Preferably, the locking plane is arranged on a side of the reinforcing protrusion away from the axis of the insert; or, the locking plane is arranged on a side of the reinforcing protrusion close to the axis of the insert.

[0011] Preferably, a limiting groove is provided on the inner circumference and / or outer circumference of the insert, the limiting groove having a limiting plane in contact with the insulating base, the limiting plane being used to press against the insulating base when the insert is subjected to an axial pulling force.

[0012] Preferably, the limiting groove is provided on the outer periphery of the insert, and the locking plane is provided on the outer peripheral surface of the insert.

[0013] Preferably, the insert includes an insert body and a reinforcing protrusion protruding from the insert body, and the reinforcing protrusion forms a limiting groove.

[0014] Preferably, the insert includes an external threaded portion, which is located outside the insulating base. The insulating base includes an extension portion, at least part of which is provided on the inner wall of the external threaded portion and extends axially along the external threaded portion.

[0015] Preferably, a limiting groove is provided on the insert, the limiting groove is embedded in the insulating base, at least one limiting groove extends in a ring shape around the circumference of the insert to form a sealing groove, and a sealing ring is provided in at least one sealing groove; and / or, at least two locking planes are provided, and at least two locking planes are arranged at an angle.

[0016] Preferably, the wall thickness of the insulating base is greater than or equal to 3 mm; and / or, two embedding pieces are provided, the two embedding pieces are respectively embedded in the axial ends of the insulating base, and the axial spacing between the two embedding pieces is greater than or equal to 3 mm.

[0017] A water heater comprises an inner tank. The inner tank is provided with an inner tank joint, and the inner tank joint is connected to the above water pipe connection structure for the water heater.

[0018] Beneficial effects of the present invention: The water pipe connection structure for a water heater proposed in the present invention has at least a portion of an insert embedded in an insulating base and connected to the insulating base as a whole. The insert has a locking plane in contact with the insulating base. When the insert is subjected to torque, the insert has a tendency to rotate around its own axis. Since the locking plane is in contact with the insulating base, the locking plane presses against the insulating base, thereby increasing the structural strength while preventing the insert from rotating relative to the insulating base, avoiding the generation of a gap between the insert and the insulating base, thereby preventing water leakage and electric shock, and ensuring safety in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural diagram of a water pipe connection structure for a water heater provided in Example 1 of the present invention;

[0020] Figure 2 This is a first cross-sectional view of a water pipe connection structure for a water heater provided in Example 1 of the present invention;

[0021] Figure 3This is a second cross-sectional view of a water pipe connection structure for a water heater provided in the first embodiment of the present invention;

[0022] Figure 4 This is a schematic structural diagram of an embedded component provided in Example 1 of the present invention;

[0023] Figure 5 is a cross-sectional view of an insert provided in Example 1 of the present invention;

[0024] Figure 6 is a structural schematic diagram of another insert provided in Example 1 of the present invention;

[0025] Figure 7 is a schematic structural diagram of an insert provided in the second embodiment of the present invention;

[0026] Figure 8 is a cross-sectional view of an insert provided in Example 2 of the present invention;

[0027] Figure 9 is a schematic structural diagram of an insert provided in Example 3 of the present invention;

[0028] Figure 10 is a cross-sectional view of an insert provided in Example 3 of the present invention;

[0029] Figure 11 is a schematic structural diagram of an insert provided in a fourth embodiment of the present invention;

[0030] Figure 12 This is a schematic structural diagram of an embedded component provided by the fifth embodiment of the present invention;

[0031] Figure 13 This is a schematic structural diagram of another embedded component provided by the fifth embodiment of the present invention;

[0032] Figure 14 is a structural diagram of an insert provided by Example 6 of the present invention;

[0033] Figure 15 is a cross-sectional view of an insert provided in Example 6 of the present invention;

[0034] Figure 16 This is a first structural diagram of a water heater provided by Embodiment 7 of the present invention;

[0035] Figure 17 is a first cross-sectional view of a water heater provided by Embodiment 7 of the present invention;

[0036] Figure 18 yes Figure 17 Schematic diagram of part of the structure;

[0037] Figure 19 This is a second structural diagram of the water heater provided by the seventh embodiment of the present invention;

[0038] Figure 20 is a second cross-sectional view of the water heater provided by the seventh embodiment of the present invention;

[0039] Figure 21 yes Figure 20 Schematic diagram of part of the structure;

[0040] Figure 22 This is a third structural diagram of the water heater provided in Example 7 of the present invention.

[0041] In the figure: 10, insulating base; 11, extension portion; 20, insert; 201, locking plane; 202, limiting groove; 2021, limiting plane; 21, embedded body; 22, reinforcing protrusion; 23, external threaded portion; 24, auxiliary protrusion; 30, sealing ring; 100, insulating tube body; 110, tube body; 120, protective cover; 130, first tube body; 140, second tube body; 200, water pipe. DETAILED DESCRIPTION

[0042] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, but are not to be construed as limiting the present invention.

[0043] In the description of the present invention, unless otherwise specified or limited, the terms "connected," "connected," and "fixed" should be interpreted broadly. For example, they can refer to fixed, removable, or integrated connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; internal communication between two components; or interaction between two components. A person of ordinary skill in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances. In the present invention, unless otherwise specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Furthermore, "above," "above," and "above" a first feature may include the first feature being directly above or diagonally above the second feature, or may simply mean that the first feature is at a higher level than the second feature. "Below," "below," and "below" a first feature may include the first feature being directly below or diagonally below the second feature, or may simply mean that the first feature is at a lower level than the second feature.

[0044] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0045] Example 1

[0046] See also Figure 1 and Figure 2 This embodiment provides a water pipe connection structure for a water heater, comprising an insulating base 10 and an insert 20. At least a portion of the insert 20 is embedded in and integrally connected to the insulating base 10. By attaching the insert 20 to the insulating base 10 and connecting it to the water pipe, the structure provides insulation while ensuring connection strength.

[0047] Exemplarily, the insulating base 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 base 10 can be connected as a whole by injection molding, hot pressing, ultrasonic embedding, etc. For example, the metal part is pre-placed in a mold, molten plastic is injected and cooled to form, and the metal and plastic are connected as a whole by mechanical interlocking. When the insert 20 is a plastic part, the material of the insert 20 and the insulating base 10 can be the same or different. For example, the strength of the insert 20 is greater than that of the insulating base 10, which ensures structural strength while reducing costs. The insert 20 and the insulating base 10 can be connected as a whole by secondary injection molding, ultrasonic welding, laser welding, etc.

[0048] A single insulating base 10 can be connected to one insert 20, or to two or more inserts 20. Exemplarily, a single insulating base 10 is connected to two inserts 20, each of which is embedded in the axial ends of the insulating base 10. The two inserts 20 are respectively a first insert and a second insert, with at least a portion of the first insert embedded in one axial end of the insulating base 10, and at least a portion of the second insert embedded in the other axial end of the insulating base 10. Exemplarily, a single insulating base 10 is connected to two inserts 20, each of which is arranged side by side on one side of the insulating base 10.

[0049] To ensure safe water and electricity use, when both inserts 20 are metal, a safe distance must be maintained between them to ensure insulation. For example, a single insulating base 10 connects two inserts 20, with the two inserts 20 embedded in the insulating base 10 at either end in the axial direction, and the axial spacing between the two inserts 20 is greater than or equal to 3 mm. Figure 2 L represents the axial distance between the two embedded parts 20. Since the axial distance is greater than or equal to 3 mm, even if one of the embedded parts 20 is charged, it will not be transmitted to the other embedded part 20, ensuring insulation and safety.

[0050] 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.

[0051] To ensure reliability in use, the wall thickness of the insulating base 10 is greater than or equal to 3 mm, which can increase the resistance to torsion and pulling. In some embodiments, the wall thickness of the insulating base 10 is greater than or equal to 5 mm. In some embodiments, the wall thickness of the insulating base 10 is equal to 3 mm, 4 mm, 5 mm, or 6 mm. The insulating base 10 and the insert 20 extend along the same axis, and a channel for water to flow through is formed inside the insulating base 10. The wall thickness of the insulating base 10 is the thickness of the insulating base 10 in the radial direction. The wall thickness of the insulating base 10 is greater than or equal to 3 mm, that is, the thickness of the insulating base 10 in the radial direction at any position is greater than or equal to 3 mm.

[0052] Optionally, the wall thickness of the insulating base 10 is equal to the axial distance between the two embedding parts 20. This ensures both reliability and safety.

[0053] The insert 20 is a threaded member, which can be an external thread member or an internal thread member. When the insert 20 is an internal thread member, the insert 20 can be completely embedded in the insulating base 10 or partially embedded in the insulating base 10. When the insert 20 is an external thread member, the insert 20 is partially embedded in the insulating base 10.

[0054] Illustratively, the insert 20 includes an externally threaded portion 23 located outside the insulating base 10. The insulating base 10 includes an extension portion 11, at least a portion of which is disposed on the inner wall of the externally threaded portion 23 and extends axially along the externally threaded portion 23. The provision of the extension portion 11 increases 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 portion 11 extends to the end of the external thread portion 23 located outside the insulating base 10. The end of the extension portion 11 can be flush with the end of the external thread portion 23 or can protrude outward relative to the end of the external thread portion 23. The other end of the extension portion 11 can extend into the interior of the internal threaded member.

[0056] Exemplarily, the insert 20 is an externally threaded member, and the externally threaded portion 23 of the insert 20 is located outside the insulating base 10. Exemplarily, the insert 20 is an internally threaded member, and the insert 20 is completely embedded in the insulating base 10. The end of the insert 20 can be flush with the end of the insulating base 10, or can be recessed relative to the end of the insulating base 10.

[0057] See also Figure 3 and Figure 4The insert 20 has a locking surface 201 that contacts the insulating base 10. This surface is used to hold the insert 20 against the insulating base 10 when torque is applied. When torque is applied to the insert 20, it tends to rotate about its own axis. Because the locking surface 201 contacts the insulating base 10, it presses against the insulating base 10, increasing structural strength while preventing the insert 20 from rotating relative to the insulating base 10. This prevents gaps between the insert 20 and the insulating base 10, preventing water leakage and electric shock, and ensuring safety.

[0058] Illustratively, the angle between locking plane 201 and the radial cross-section of insert 20 is greater than 0 degrees and less than or equal to 90 degrees. When insert 20 is subjected to torque, the instantaneous motion direction of any point on its surface is the tangent direction at that point. The tangential force generated by the torque is perpendicular to locking plane 201, or a component of the tangential force is perpendicular to locking plane 201, causing locking plane 201 to press against insulating substrate 10.

[0059] The radial cross section of the insert 20 extends in the radial direction of the insert 20, that is, perpendicular to the axis of the insert 20. The angle between the locking plane 201 and the radial cross section of the insert 20 is greater than 0 degrees and less than or equal to 90 degrees, that is, the locking plane 201 is parallel to the axis of the insert 20 or forms an angle greater than 0 degrees and less than 90 degrees.

[0060] In some embodiments, the angle between the locking plane 201 and the radial cross section of the insert 20 is equal to 90 degrees, that is, the locking plane 201 is parallel to the axis of the insert 20 . Figure 3 In the figure, the arc 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 In the figure, line O1 represents the axis of the insert 20. When the insert 20 is subjected to torque, the instantaneous motion direction of any point on its surface is the tangent direction at that point. The instantaneous motion direction of at least one point is perpendicular to the locking plane 201. The tangential force generated by the torque is perpendicular to the locking plane 201, forcing the locking plane 201 to press against the insulating base 10, preventing the insert 20 from twisting relative to the insulating base 10.

[0061] The axis of the insert 20 can be located within the locking plane 201, or the axis of the insert 20 can be spaced apart from the locking plane 201. This facilitates the layout of the locking plane 201, facilitates processing and production, and reduces costs. The spacing between the axis of the insert 20 and the locking plane 201 can be set according to actual needs.

[0062] The area of ​​the locking plane 201 can be set according to actual needs. When the locking plane 201 is parallel to the axis of the insert 20, the larger the area of ​​the locking plane 201, the stronger the anti-twist effect.

[0063] In some embodiments, the angle between the locking plane 201 and the radial cross-section of the insert 20 is greater than 0 degrees and less than 90 degrees, that is, the locking plane 201 intersects the axis of the insert 20. When the insert 20 is subjected to torque, the instantaneous motion direction of any point on the surface of the insert 20 is the tangential direction of that point. The tangential force generated by the torque acts on the locking plane 201, and one component of the tangential force is perpendicular to the locking plane 201, which also prevents the insert 20 from twisting relative to the insulating substrate 10. Exemplarily, the angle between the locking plane 201 and the radial cross-section of the insert 20 is greater than or equal to 30 degrees and less than or equal to 60 degrees. Exemplarily, the angle between the locking plane 201 and the radial cross-section of the insert 20 is equal to 10 degrees, 30 degrees, 40 degrees, 50 degrees, 60 degrees, 70 degrees, or 80 degrees.

[0064] By configuring 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 effectively prevents twisting. 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 enhance the anti-twist effect. For example, the locking plane 201 is provided with multiple locking protrusions, each of which can extend in the same or different directions.

[0065] For each insert 20, one, two, or more locking planes 201 may be provided. When two or more locking planes 201 are provided, the locking planes 201 may be parallel to each other or arranged at an angle. For example, providing at least two locking planes 201, with at least two locking planes 201 arranged at an angle, can further enhance the anti-twist effect.

[0066] The locking plane 201 can be provided on the outer surface, inner surface, or end surface of the insert 20, without limitation, as long as the locking plane 201 can contact the insulating substrate 10 to prevent twisting. For example, the insert 20 includes an insert body 21 and a reinforcement protrusion 22 protruding from the insert body 21. The insert body 21 and / or the reinforcement protrusion 22 are provided with the locking plane 201. The reinforcement protrusion 22 increases the contact area between the insert 20 and the insulating substrate 10, thereby enhancing structural strength.

[0067] The reinforcement protrusion 22 is provided on the end, inner circumference and / or outer circumference of the embedded body 21. Figure 4As shown, the reinforcing protrusion 22 is provided at the end of the embedded body 21 , extending the length of the embedded body 21 and increasing the distance that the embedded body 21 is embedded in the insulating base 10 .

[0068] There can be one, two or more reinforcing protrusions 22. When there are two or more reinforcing protrusions 22, each reinforcing protrusion 22 can be set at the same position of the embedded body 21, for example, all are set at the outer peripheral surface of the embedded body 21; or each reinforcing protrusion 22 can be distributed at one, two or more positions of the embedded body 21, for example, at least one reinforcing protrusion 22 is set at the end of the embedded body 21, at least one reinforcing protrusion 22 is set at the inner peripheral surface of the embedded body 21, and at least one reinforcing protrusion 22 is set at the outer peripheral surface of the embedded body 21. Figure 4 and Figure 6 As shown, a plurality of reinforcing protrusions 22 are provided, and the plurality of reinforcing protrusions 22 are arranged at intervals around the circumference of the embedded body 21 at the end portion of the embedded body 21 .

[0069] In some embodiments, both the embedded body 21 and the reinforcing protrusion 22 are provided with a locking plane 201. In some embodiments, the embedded body 21 is a rotating body, and the reinforcing protrusion 22 is provided with a locking plane 201. In some embodiments, the embedded body 21 is provided with a locking plane 201, and the structural shape of the reinforcing protrusion 22 can be set according to actual needs.

[0070] The reinforcing protrusion 22 may be shaped like a cylinder, a cuboid, a hemisphere, or an irregular shape. For example, a locking plane 201 is provided on the reinforcing protrusion 22. The locking plane 201 is configured so that at least a portion of the surface of the reinforcing protrusion 22 is flat, while the remaining portion may be flat or curved.

[0071] The locking plane 201 can be provided on the side of the reinforcing protrusion 22. For example, the locking plane 201 is provided on the side of the reinforcing protrusion 22 close to the axis of the insert 20, or the locking plane 201 is provided on the side of the reinforcing protrusion 22 away from the axis of the insert 20, or the locking plane 201 is provided on the side where adjacent reinforcing protrusions 22 are close to each other.

[0072] Exemplarily, the reinforcing protrusion 22 is provided at the end or outer circumference of the embedded body 21, and the locking plane 201 is provided on the side of the reinforcing protrusion 22 away from the first axis. Exemplarily, the reinforcing protrusion 22 is provided at the end or inner circumference of the embedded body 21, and the locking plane 201 is provided on the side of the reinforcing protrusion 22 close to the first axis.

[0073] 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 be provided with one locking plane 201, or may be provided with two or more locking planes 201. Figure 4 As shown, each reinforcement protrusion 22 is provided with a locking plane 201 , some reinforcement protrusions 22 are provided with one locking plane 201 , and some reinforcement protrusions 22 are provided with two locking planes 201 .

[0074] When there are two or more reinforcing protrusions 22, the structural shapes of the reinforcing protrusions 22 may be the same or different. Figure 4 As shown, the insert 20 includes six reinforcement protrusions 22, two of which have the same structural shape, and the remaining four reinforcement protrusions 22 have the same structural shape. Figure 6 As shown, the insert 20 includes eight reinforcement protrusions 22 , and the structural shapes of the various reinforcement protrusions 22 are the same, which facilitates processing and production.

[0075] See also Figure 4 and Figure 5 The inner and / or outer circumferential surfaces of the insert 20 are provided with a limiting groove 202. The limiting groove 202 has a limiting surface 2021 that contacts the insulating base 10. The limiting surface 2021 is used to press against the insulating base 10 when the insert 20 is subjected to an axial pulling force. When the insert 20 is subjected to the pulling force, the insert 20 tends to move along its own axis. Since the limiting surface 2021 contacts the insulating base 10, the limiting surface 2021 presses against the insulating base 10, increasing the structural strength while preventing the insert 20 from moving relative to the insulating base 10. This avoids the formation of a gap between the insert 20 and the insulating base 10, thereby preventing water leakage and electric shock, and ensuring safety in use.

[0076] For example, limiting grooves 202 are provided on both the inner and outer circumferential 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 base 10 to increase the contact area with the insulating base 10 and enhance the structural strength.

[0077] The angle between the limiting plane 2021 and the radial cross section of the insert 20 is greater than or equal to 0 degrees and less than 90 degrees. When the insert 20 is subjected to a pullout force, the pullout force acts perpendicularly on the limiting plane 2021, or a component of the pullout force acts perpendicularly on the limiting plane 2021, so that the limiting plane 2021 is pressed against the insulating base 10, thereby increasing structural strength and preventing the insert 20 from moving relative to the insulating base 10.

[0078] The retaining groove 202 comprises a notch, a bottom wall, and two side walls. The bottom wall is disposed opposite the notch, and the angle between at least one of the side walls, serving as a retaining plane 2021, and the bottom wall is greater than 0 degrees and less than or equal to 90 degrees. Exemplarily, the cross-sectional shape of the retaining groove 202 is rectangular, trapezoidal, or irregularly shaped. When two or more retaining grooves 202 are provided, the cross-sectional shapes of the respective retaining grooves 202 may be the same or different.

[0079] For example, the cross-sectional area of ​​the retaining groove 202 gradually increases from the notch to the bottom wall, that is, the retaining groove 202 gradually widens, further improving its stretch resistance and fully locking with the insulating base 10 to prevent deformation of the insulating base 10. This can better achieve the connection between the insulating base 10 and the insert 20, and achieve a better sealing effect. For example, the locking plane 201 is provided on the reinforcing protrusion 22, and the retaining groove 202 is provided on the insert body 21. The layout of the two does not affect each other, facilitating processing and production.

[0080] Example 2

[0081] Figure 7 and Figure 8 A second embodiment is shown, wherein components identical or corresponding to those in the first embodiment are numbered accordingly. The second embodiment differs from the first embodiment in that a plurality of reinforcing protrusions 22 are provided, each disposed on the inner circumferential surface of the insert body 21 and spaced apart circumferentially around the insert body 21. Providing the reinforcing protrusions 22 on the inner circumferential surface of the insert body 21 increases the local wall thickness of the insert body 21, thereby enhancing the structural strength. The axial length of the insert body 21 is reduced compared to the first embodiment, thereby preventing interference between the two inserts 20 on the insulating substrate 10.

[0082] Example 3

[0083] Figure 9 and Figure 10 A third embodiment is shown, wherein components identical or corresponding to those in the first embodiment are numbered accordingly. The third embodiment differs from the first embodiment in that, for a single reinforcing protrusion 22, a portion of the reinforcing protrusion 22 is located at the end of the insert body 21, while a portion of the reinforcing protrusion 22 is located on the inner circumference of the insert body 21. This ensures that the insert 20 has sufficient length to fully contact the insulating substrate 10, while also increasing the local wall thickness of the insert body 21 to ensure the structural strength of the insert 20.

[0084] In other embodiments, it is also possible that: for a single reinforcing protrusion 22, part of the reinforcing protrusion 22 is located at the end of the embedded body 21, part of the reinforcing protrusion 22 is located at the inner circumference of the embedded body 21, and part of the reinforcing protrusion 22 is located at the outer circumference of the embedded body 21. Alternatively, for a single reinforcing protrusion 22, part of the reinforcing protrusion 22 is located at the end of the embedded body 21, and part of the reinforcing protrusion 22 is located at the outer circumference of the embedded body 21.

[0085] Multiple reinforcement protrusions 22 are provided, and the multiple reinforcement protrusions 22 can be consistent. For example, for a single reinforcement protrusion 22, a portion of the reinforcement protrusion 22 is located at the end of the embedded body 21, and a portion of the reinforcement protrusion 22 is located on the inner circumference of the embedded body 21. The multiple reinforcement protrusions 22 can also be inconsistent. For example, for one reinforcement protrusion 22, a portion of the reinforcement protrusion 22 is located at the end of the embedded body 21, and a portion of the reinforcement protrusion 22 is located on the inner circumference of the embedded body 21, while for another reinforcement protrusion 22, the reinforcement protrusion 22 is located at the end of the embedded body 21. In some embodiments, auxiliary protrusions 24 can be provided on the inner circumference of the embedded body 21. The auxiliary protrusions 24 are protruded from the inner circumference of the embedded body 21 to increase the contact area with the insulating substrate 10 and increase the structural strength.

[0086] Example 4

[0087] Figure 11 The fourth embodiment is shown, wherein the components identical or corresponding to the first embodiment are marked with the corresponding reference numerals. The fourth embodiment differs from the first embodiment in that the limiting groove 202 is provided on the outer periphery of the insert 20 and the locking plane 201 is provided on the outer peripheral surface of the insert 20, thereby ensuring a compact structure and facilitating processing and production. Figure 11 As shown, the limiting groove 202 extends around the circumference of the insert 20 and is concave relative to the outer peripheral surface of the insert 20. The locking plane 201 is arranged on the outer peripheral surface of the insert 20. One or more locking planes 201 can be provided. For example, six locking planes 201 are provided so that the outer peripheral surface of the reinforcing protrusion 22 is hexagonal.

[0088] Example 5

[0089] Figure 12 and Figure 13 Embodiment 5 is shown, in which the components identical or corresponding to those in embodiment 1 are marked with the corresponding figures in embodiment 1. The difference between embodiment 5 and embodiment 1 is that the limiting groove 202 and the reinforcing protrusion 22 are independently provided, or the reinforcing protrusion 22 surrounds the limiting groove 202.

[0090] like Figure 12As shown, the limiting groove 202 and the reinforcing protrusion 22 are independently provided. The limiting groove 202 is concave relative to the outer circumference of the embedded body 21, while the reinforcing protrusion 22 is convex relative to the outer circumference of the embedded body 21. Multiple reinforcing protrusions 22 can be provided, arranged in multiple circles around the outer circumference of the embedded body 21, with the limiting groove 202 provided between adjacent circles of reinforcing protrusions 22. The locking plane 210 can be provided on either the reinforcing protrusion 22 or the outer circumference of the embedded body 21.

[0091] like Figure 13 As shown, some of the reinforcing protrusions 22 extend around the circumference of 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, thereby ensuring a compact structure.

[0092] Example 6

[0093] Figure 14 and Figure 15 A sixth embodiment is shown, wherein components identical or corresponding to those in the first embodiment are numbered accordingly. The sixth embodiment differs from the first embodiment in that a limiting groove 202 is provided on the insert 20, which is embedded in the insulating base 10. At least one limiting groove 202 extends annularly around the circumference of the insert 20 to form a sealing groove, and a sealing ring 30 is disposed within at least one of the sealing grooves. The provision of the sealing ring 30 enhances the sealing between the insert 20 and the insulating base 10. Even if a gap forms between the insert 20 and the insulating base 10, the sealing performance of the sealing ring 30 prevents water leakage.

[0094] When the insert 20 is provided with multiple retaining grooves 202, at least one retaining groove 202 extends annularly around the circumference of the insert 20 to form a sealing groove. The other retaining grooves 202 may extend axially along the insert 20 or extend in an arc shape around the circumference of the insert 20. When multiple retaining grooves 202 extend annularly around the circumference of the insert 20 to form multiple sealing grooves, a sealing ring 30 is disposed within at least one of the sealing grooves. For example, a sealing ring 30 is disposed in a sealing groove near the end of the insulating substrate 10.

[0095] The sealing ring 30 forms an interference fit with the sealing groove. The cross-sectional shape of the sealing ring 30 can be the same as or different from that of the sealing groove, as long as the sealing ring 30 and the sealing groove have an interference fit to provide a seal. 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.

[0096] In some embodiments, the sealing ring 30 has a sealing surface in contact with the insulating substrate 10, ensuring a seal while also providing anti-twist or anti-pullout protection. For example, the angle between the axis of the insert 20 and the sealing surface is greater than or equal to 0 degrees and less than 90 degrees. When the insert 20 is subjected to torque, the sealing surface can abut against the insulating substrate 10, providing anti-twist protection.

[0097] In some embodiments, the axis of the insert 20 is parallel to the sealing plane. In some embodiments, the outer circumference of the sealing ring 30 is provided with at least two sealing planes, and the at least two sealing planes are provided at an angle.

[0098] The sealing ring 30 has a certain elasticity, such as a rubber ring, a soft rubber ring, etc. Therefore, it is convenient for the sealing ring 30 to be set in the sealing groove with interference fit. Part of the sealing ring 30 is embedded in the sealing groove, and part of the sealing ring 30 protrudes from the sealing groove. The processing method of connecting the insulating base 10, the insert 20 and the sealing ring 30 into one body is a prior art, such as secondary injection molding, which will not be described here. Since the pressure during injection molding will cause the sealing ring 30 to be squeezed, the sealing ring 30 is compressed between the insulating base 10 and the insert 20. When a gap is generated between the insert 20 and the insulating base 10, the sealing ring 30 can use its own elastic recovery deformation to fill the gap and play a sealing role.

[0099] In some embodiments, sealing rings 30 are inserted into at least two sealing grooves to achieve multi-layer protection. In some embodiments, the radial deformation of each sealing ring 30 increases gradually from the inside out of the insulating base 10. The greater the radial deformation of the sealing ring 30, the better the sealing effect of the sealing ring 30 on the gap when it recovers. Therefore, the sealing performance of each sealing ring 30 gradually increases from the inside out of the insulating base 10, preventing water leakage and electric shock, and ensuring safe use.

[0100] It can be understood that the above-mentioned embodiments can be selectively combined as needed on the basis of being feasible, as long as there is no contradiction in the combination of these technical features. In order to make the description concise, not all possible combinations of the various technical features in the above-mentioned embodiments are described. These embodiments that are not explicitly written should also be considered to be within the scope of this specification.

[0101] In the water pipe connection structure of the water heater, the insert 20 is embedded in the insulating base 10. By optimizing the structure of the insert 20, the connection strength between the insert 20 and the insulating base 10 is increased, and the insulation performance is good.

[0102] Example 7

[0103] See also Figures 16 to 22This embodiment provides a water heater, including an inner liner, provided with an inner liner connector, to which is connected a water heater water pipe connection structure as described in any of the above embodiments. By using the above water heater water pipe connection structure in the water heater, the provision of a locking plane 201 increases structural strength while preventing the insert 20 from rotating relative to the insulating base 10, thereby avoiding the formation of a gap between the insert 20 and the insulating base 10, thereby preventing water leakage and electric shock, and ensuring safe use.

[0104] For example, Figures 16 to 21 As shown, two inserts 20 are provided on the insulating base 10: a first insert and a second insert. The second insert is internally threaded and is used to connect to the inner tank connector, while the first insert is externally threaded and is used to connect to the water heater's water inlet or outlet pipe. The axial spacing between the first and second inserts is greater than or equal to 3mm. Even if the inner tank of the water heater leaks, the second insert will conduct electricity. Because the second insert is internally threaded and fully embedded in the insulating base 10, there is no risk of human contact.

[0105] The water heater also includes an insulating tube body 100, one end of which is inserted into the internal threaded member and connected to the insulating base 10. The insulating tube body 100 is arranged in communication with the insulating base 10. When the internal threaded member is connected to the inner tank joint, the insulating tube body 100 is inserted into the interior of the inner tank. The isolated water column inside the insulating tube body 100 will form a large resistance. By utilizing the principle of resistance voltage division, the voltage conducted by the water in the water heater can be reduced to below the safe voltage. When the water in the inner tank is charged, the voltage can be reduced to below the safe voltage through the isolated water column, thus ensuring that the water outlet voltage of the water heater is below the safe voltage, ensuring the water safety of users.

[0106] The insulating tube body 100 and the insulating base body 10 can be connected by thread or injection molding. Figure 18 As shown, the insulating tube body 100 includes a tube body 110 and a protective cover 120 sleeved on the outside of the tube body 110. The tube body 110 is connected to the insulating base 10. Figure 21 As shown, the insulating tube body 100 includes a first tube body 130 and a second tube body 140. The first tube body 130 is connected to the insulating base 10, and the second tube body 140 is connected to the first tube body 130, which is convenient for processing and production. A protective cover 120 can be placed on the outside of the second tube body 140.

[0107] For example, Figure 22 As shown, the water heater also includes a water pipe 200. An insert 20 is provided on the insulating base 10. The insert 20 is an external threaded part. The water pipe 200 is connected to the insulating base 10 so that the end of the water pipe 200 has an external threaded part, which is convenient for connecting the water pipe 200 with other components.

[0108] The above embodiments merely illustrate the basic principles and features of the present invention. The present invention is not limited to the above embodiments. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A water pipe connection structure for a water heater, characterized in that: include: an insulating substrate (10); An insert (20), at least a portion of which is embedded in the insulating base (10) and integrally connected to the insulating base (10), the insert (20) having a locking plane (201) in contact with the insulating base (10), the locking plane (201) being used to press against the insulating base (10) when the insert (20) is subjected to torque.

2. The water pipe connection structure for a water heater according to claim 1, characterized in that: The angle between the locking plane (201) and the radial cross section of the insert (20) is greater than 0 degrees and less than or equal to 90 degrees.

3. The water pipe connection structure for a water heater according to claim 2, characterized in that: The locking plane (201) is perpendicular to the radial cross section of the insert (20), and the locking plane (201) is spaced apart from the axis of the insert (20).

4. The water pipe connection structure for a water heater according to claim 1, characterized in that: The insert (20) comprises an insert body (21) and a reinforcement protrusion (22) protruding from the insert body (21); the insert body (21) and / or the reinforcement protrusion (22) are provided with the locking plane (201).

5. The water pipe connection structure for a water heater according to claim 4, characterized in that: The reinforcing protrusion (22) is provided on the end, inner peripheral surface and / or outer peripheral surface of the embedded body (21); Alternatively, for a single reinforcing protrusion (22), part of the reinforcing protrusion (22) is located at the end of the embedded body (21), and part of the reinforcing protrusion (22) is located at the inner circumference and / or outer circumference of the embedded body (21).

6. The water pipe connection structure for a water heater according to claim 4, characterized in that: The locking plane (201) is arranged on a side of the reinforcing protrusion (22) away from the axis of the insert (20); Alternatively, the locking plane (201) is arranged on a side of the reinforcing protrusion (22) close to the axis of the insert (20).

7. The water pipe connection structure for a water heater according to claim 1, characterized in that: A limiting groove (202) is provided on the inner circumference and / or outer circumference of the insert (20), the limiting groove (202) having a limiting plane (2021) in contact with the insulating base (10), and the limiting plane (2021) is used to press against the insulating base (10) when the insert (20) is subjected to an axial pulling force.

8. The water pipe connection structure for a water heater according to claim 7, characterized in that: The limiting groove (202) is provided on the outer periphery of the insert (20), and the locking plane (201) is provided on the outer peripheral surface of the insert (20).

9. The water pipe connection structure for a water heater according to claim 7, characterized in that: The insert (20) comprises an insert body (21) and a reinforcing protrusion (22) protruding from the insert body (21), wherein the reinforcing protrusion (22) encloses the limiting groove (202).

10. The water pipe connection structure for a water heater according to claim 1, characterized in that: The insert (20) includes an external threaded portion (23), the external threaded portion (23) is located outside the insulating base (10), and the insulating base (10) includes an extension portion (11), at least part of which is arranged on the inner wall of the external threaded portion (23) and extends along the axial direction of the external threaded portion (23).

11. The water pipe connection structure for a water heater according to claim 1, characterized in that: A limiting groove (202) is provided on the insert (20), the limiting groove (202) is embedded in the insulating base (10), at least one of the limiting grooves (202) extends in an annular shape around the circumference of the insert (20) to form a sealing groove, and a sealing ring (30) is provided in at least one of the sealing grooves; And / or, at least two locking planes (201) are provided, and at least two locking planes (201) are provided at an angle.

12. The water pipe connection structure for a water heater according to any one of claims 1 to 11, characterized in that: The wall thickness of the insulating base (10) is greater than or equal to 3 mm; and / or, a single insulating base (10) is connected to two embedded parts (20), the two embedded parts (20) are respectively embedded at two axial ends of the insulating base (10), and the axial spacing between the two embedded parts (20) is greater than or equal to 3 mm.

13. A water heater comprising an inner tank, wherein the inner tank is provided with an inner tank joint, characterized in that: The inner tank joint is connected to the water pipe connection structure for the water heater according to any one of claims 1 to 12.

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