Pipe connecting structure of hot water tank and water heater

Abstract

The utility model relates to hot water tank technical field provides a kind of pipe body connecting structure and water heater of hot water tank, pipe body connecting structure includes first pipe body and second pipe body, first pipe body includes first section of tube body and second section of tube body, first section of tube body has at least one set of oppositely arranged latch slot, elastic latch piece is inserted in latch slot, first elastic arm and second elastic arm are inserted into latch slot and are oppositely clamped in the both sides of second pipe body, the outer periphery of second pipe body is provided with anti-drop convex edge, anti-drop convex edge is inserted into first section of tube body, the side of anti-drop convex edge away from front end is abutted to first elastic arm and second elastic arm, first section of tube body is provided with threaded through-hole, threaded through-hole is connected with anti-drop screw, the side of anti-drop convex edge away from front end is also abutted to anti-drop screw, first pipe body and second pipe body butt joint place are not easy to leak, it is convenient to assemble, and sealing reliability is high.

Description

Technical Field

[0001] This utility model belongs to the field of water heater tanks, and particularly relates to a pipe connection structure for a water heater tank and a water heater. Background Technology

[0002] Current hot water tanks are connected to inlet and / or outlet pipes, and the joints of these pipes are mostly welded, which is a complex process and inconvenient to assemble. Existing technologies also use hose clamps for locking, but hose clamps are prone to failure under long-term use, resulting in unreliable sealing. Utility Model Content

[0003] The purpose of this utility model is to overcome at least one of the shortcomings of the prior art and provide a pipe connection structure for a hot water tank and a water heater, which can reliably connect the first pipe and the second pipe, prevent leakage at the connection point of the first pipe and the second pipe, and provide convenient assembly and high sealing reliability.

[0004] The technical solution of this utility model is: a pipe connection structure for a hot water tank, including a first pipe and a second pipe. The first pipe is fixed to the hot water tank and communicates with the inner cavity of the hot water tank. The first pipe includes a first section and a second section. The first section and the second section are coaxially arranged and integrally connected. The outer diameter of the first section is larger than the outer diameter of the second section. The front end of the second pipe is inserted into the first section, so that the second pipe communicates with the first pipe.

[0005] The first tube section has at least one set of opposing pin slots, which extend from the outer side to the inner side of the first tube section. The tube connection structure also includes an elastic pin, which has a first elastic arm and a second elastic arm that can be elastically opened. The elastic pin is inserted into the pin slot, and the first elastic arm and the second elastic arm extend into the pin slot and clamp each other on both sides of the second tube. The outer periphery of the second tube is provided with an anti-detachment protrusion, which extends into the first tube section. The side of the anti-detachment protrusion away from the front end abuts against the first elastic arm and the second elastic arm.

[0006] The first section of the tube is provided with a threaded through hole, and the threaded through hole is connected to an anti-loosening screw. The side of the anti-loosening protrusion away from the front end also abuts against the anti-loosening screw.

[0007] Optionally, the elastic pin is integrally bent from a metal wire or a metal sheet. The elastic pin includes an arc-shaped elastic bending portion. The first end of the first elastic arm and the first end of the second elastic arm are integrally connected to the two ends of the elastic bending portion. The middle parts of the first elastic arm and the second elastic arm are arc-shaped and fit against the outer arc surface of the second tube. The second end of the first elastic arm and the second end of the second elastic arm are both integrally provided with guide portions.

[0008] Optionally, the outer periphery of the elastic pin is fitted with an elastic silicone sleeve.

[0009] Optionally, the surface of the elastic silicone sleeve is provided with anti-slip raised texture.

[0010] Optionally, the elastic bending portion is connected to a ring fastener.

[0011] Optionally, an annular groove is provided on the outer periphery of the front end of the second tube body, and a sealing ring is provided in the annular groove. When the front end of the second tube body is inserted into the first tube body, the sealing ring abuts against the inner side of the first tube body.

[0012] Optionally, at least two annular grooves are provided, each annular groove is spaced apart along the axial direction of the second tube, the sealing ring is an O-ring, and at least two sealing rings have different wire diameters.

[0013] Optionally, the front end face of the second tube body faces the end face of the second tube segment, and an annular flat gasket is provided between the front end face of the second tube body and the end face of the second tube segment.

[0014] Optionally, the inner diameter of the second section of the tube is equal to the inner diameter of the second tube body.

[0015] This utility model also provides a hot water tank, including a hot water tank and a pipe connection structure for the hot water tank, wherein the first pipe of the pipe connection structure is fixedly connected to the hot water tank.

[0016] This utility model provides a pipe connection structure for a hot water tank and a water heater. The first pipe is fixed to the hot water tank and communicates with the inner cavity of the hot water tank. The first pipe includes a first section and a second section. The first section and the second section are coaxially arranged and integrally connected. The outer diameter of the first section is larger than the outer diameter of the second section, and the shape of the first pipe is a stepped shaft. The front end of the second tube is inserted into the first tube section, thus communicating with the first tube. The first tube section has at least one set of opposing pin slots, which extend from the outer side to the inner side of the first tube section. The tube connection structure further includes an elastic pin, which has a first elastic arm and a second elastic arm that can be elastically opened. The elastic pin is inserted into the pin slot, and the first and second elastic arms extend into the pin slot and clamp each other against the two sides of the second tube. An anti-detachment protrusion is provided on the outer periphery of the second tube, which extends into the first tube section. The side of the anti-detachment protrusion away from the front end abuts against the first and second elastic arms. The tube body is provided with a threaded through hole, and the threaded through hole is connected to an anti-loosening screw. The side of the anti-loosening protrusion away from the front end also abuts against the anti-loosening screw. The anti-loosening screw works in conjunction with the first and second elastic arms of the elastic pin to ensure that the anti-loosening protrusion is abutted at least three points to prevent the anti-loosening protrusion from sliding out of the first tube body. When installed, the elastic pin can be inserted into the pin groove. The anti-loosening screw and the elastic pin block the anti-loosening protrusion radially. Even under long-term use or when the second tube body is pulled, the anti-loosening screw and the elastic pin can still reliably limit the anti-loosening protrusion to prevent the second tube body from loosening or separating from the first tube body. The sealing reliability is high, and the anti-loosening screw and the elastic pin are easy to install and disassemble, facilitating assembly and maintenance. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] in:

[0019] Figure 1 This is a three-dimensional schematic diagram of the pipe connection structure of a hot water tank provided in an embodiment of the present utility model;

[0020] Figure 2 This is an exploded view of the pipe connection structure of a hot water tank according to an embodiment of the present invention;

[0021] Figure 3This is a longitudinal cross-sectional view of a pipe connection structure of a hot water tank provided in an embodiment of this utility model;

[0022] Figure 4 This is a cross-sectional view of the pipe connection structure of a hot water tank provided in an embodiment of the present invention;

[0023] Figure 5 This is a three-dimensional schematic diagram of the elastic pin component in the pipe connection structure of a hot water tank provided in an embodiment of the present utility model;

[0024] Figure 6 This is a longitudinal cross-sectional view of a pipe connection structure of a hot water tank provided in an embodiment of this utility model;

[0025] Figure 7 This is a three-dimensional schematic diagram of a water heater provided in an embodiment of this utility model.

[0026] 1. First pipe body; 11. First section of pipe body; 12. Second section of pipe body; 101. Pin groove; 2. Second pipe body; 21. Anti-detachment protrusion; 22. Annular groove; 24. Sealing ring; 25. Flat washer; 31. Elastic pin; 311. First elastic arm; 312. Second elastic arm; 313. Guide part; 314. Elastic bending part; 32. Anti-detachment screw; 110. Hot water tank. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0028] It should be noted that the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to direct setup or connection, or indirect setup or connection through centered components or centered structures.

[0029] Furthermore, in embodiments of this utility model, terms such as "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" are used to indicate orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, or in a conventional placement or usage state. These terms are merely for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the structure, feature, device, or element referred to must have a specific orientation or positional relationship, nor that it must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In the description of this utility model, unless otherwise stated, "multiple" means two or more.

[0030] The various specific technical features and embodiments described in the detailed embodiments can be combined in any suitable manner without contradiction. For example, different implementation methods can be formed by combining different specific technical features / embodiments. In order to avoid unnecessary repetition, the various possible combinations of the various specific technical features / embodiments in this utility model will not be described separately.

[0031] like Figures 1 to 5 as well as Figure 7 As shown, the first embodiment of this utility model provides a pipe connection structure for a hot water tank, including a first pipe body 1 and a second pipe body 2. The first pipe body 1 is fixed to the hot water tank 110 and communicates with the inner cavity of the hot water tank 110. The first pipe body 1 includes a first pipe section 11 and a second pipe section 12. The first pipe section 11 and the second pipe section 12 are coaxially arranged and integrally connected. The outer diameter of the first pipe section 11 is larger than the outer diameter of the second pipe section 12. The shape of the first pipe body 1 can be a stepped shaft. The front end of the second tube body 2 is inserted into the first tube body 11, so that the second tube body 2 is connected to the first tube body 1; the first tube body 11 has at least one set of opposing pin grooves 101, the pin grooves 101 extending from the outside to the inside of the first tube body 11; the tube body connection structure also includes an elastic pin 31, the elastic pin 31 has a first elastic arm 311 and a second elastic arm 312 that can be elastically opened, the elastic pin 31 is inserted into the pin groove 101, the first elastic arm 311 and the second elastic arm 312 extend into the pin groove 101 and clamp each other on both sides of the second tube body 2, the outer periphery of the second tube body 2 is provided with an anti-detachment protrusion 21, the anti-detachment protrusion 21 extends into the first tube body 11, and the side of the anti-detachment protrusion 21 away from the front end abuts against the first elastic arm 311 and the second elastic arm 312. The first section of the tube body 11 is provided with a threaded through hole, and the threaded through hole is connected to an anti-loosening screw 32. The side of the anti-loosening protrusion 21 away from the front end also abuts against the anti-loosening screw 32. The anti-loosening screw 32 works in conjunction with the first elastic arm 311 and the second elastic arm 312 of the elastic pin 31 to make the anti-loosening protrusion 21 abut at least three points to prevent the anti-loosening protrusion 21 from sliding in the direction of exiting the first tube body 1. When installed, the elastic pin 31 can be inserted into the pin groove 101. The anti-loosening screw 32 and the elastic pin 31 block the anti-loosening protrusion 21 radially. Even under long-term use or when the second tube body 2 is pulled, the anti-loosening screw 32 and the elastic pin 31 can still reliably limit the anti-loosening protrusion 21 to prevent the second tube body 2 from loosening or separating from the first tube body 1. The sealing reliability is high, and the anti-loosening screw 32 and the elastic pin 31 are easy to install and remove, and easy to assemble and maintain.

[0032] In specific applications, such as Figures 1 to 3As shown, the first tube 1 and the second tube 2 can be rigid plastic tubes, which have high structural strength and are not easily deformed.

[0033] Optionally, such as Figures 1 to 5 As shown, the elastic pin 31 is integrally bent from a metal wire or sheet. The elastic pin 31 includes an arc-shaped elastic bending portion 314. The first end of the first elastic arm 311 and the first end of the second elastic arm 312 are integrally connected to the two ends of the elastic bending portion 314. The middle portions of the first elastic arm 311 and the second elastic arm 312 are arc-shaped and fit against the outer arc surface of the second tube body 2. The second ends of the first elastic arm 311 and the second elastic arm 312 are each integrally provided with a guide portion 313, which are arranged in a funnel shape. The elastic pin 31 can be integrally formed, and its outer surface can be electroplated for excellent corrosion resistance.

[0034] Optionally, such as Figures 1 to 5 As shown, the elastic pin 31 is fitted with an elastic silicone sleeve (not shown in the figure) on its outer periphery. This sleeve can prevent the elastic pin 31 from being corroded and improve its durability. On the other hand, it can prevent the elastic pin 31 from scratching the coating on the surface of the hot water tank 110.

[0035] Optionally, such as Figures 1 to 5 As shown, the axial height of the pin groove 101 along the first tube 1 matches the thickness of the elastic pin 31, that is, the two end faces of the elastic pin 31 abut against the two sides of the pin groove 101 respectively, and the elastic pin 31 abuts against the wall of the pin groove 101, so as to prevent the elastic pin 31 from sliding along the axial direction of the first tube 1. This ensures the supporting effect of the elastic pin 31 on the anti-disengagement protrusion 21, and the elastic pin 31 is not easily deformed by force.

[0036] Optionally, the surface of the elastic silicone sleeve is provided with anti-slip raised texture (not shown in the figure), and the connection between the elastic pin 31 and the second tube 2 is relatively more stable.

[0037] Optionally, the elastic bending portion 314 is connected to an annular fastener (not shown in the figure). With the annular fastener, when it is necessary to remove the elastic pin 31, the operator can insert his / her finger into the annular fastener and pull out the elastic pin 31 directly, making the operation more convenient.

[0038] Optionally, such as Figures 1 to 6 As shown, an annular groove 22 is provided on the outer periphery of the front end of the second tube body 2, and a sealing ring 24 is provided in the annular groove 22. When the front end of the second tube body 2 is inserted into the first tube body 11, the sealing ring 24 abuts against the inner side of the first tube body 11. The sealing ring 24 is a rubber ring, which has a good sealing effect.

[0039] Optionally, at least two annular grooves 22 are provided, and each annular groove 22 is spaced apart along the axial direction of the second tube body 2. The sealing ring 24 is an O-ring, and the diameters of at least two sealing rings 24 are different. In specific applications, the sealing ring 24 that is relatively far from the front end of the second tube body 2 has a larger diameter, and the compression of adjacent sealing rings 24 is different. Under long-term use, its sealing reliability is better.

[0040] In practical applications, the outer diameter of the front end of the second tube 2 is equal to the inner diameter of the first tube 11, and the connection between the second tube 2 and the first tube 1 has good reliability.

[0041] Optionally, the front end face of the second tube body 2 faces the end face of the second tube segment 12, and an annular flat gasket 25 is provided between the front end face of the second tube body 2 and the end face of the second tube segment 12. The flat gasket 25 can be a rubber gasket, which can further improve the sealing reliability between the first tube body 1 and the second tube body 2.

[0042] Optionally, the inner diameter of the second section of the pipe body 12 is equal to the inner diameter of the second pipe body 2, so that after the first pipe body 1 and the second pipe body 2 are connected, the overall flow channel size is consistent, which helps to ensure smooth fluid flow.

[0043] In specific applications, elastic buckles can be optionally provided at the two guide portions 313 of the elastic pin 31. After the elastic pin 31 is inserted into the pin groove 101, the elastic buckles are placed on the two guide portions 313, which can keep the first elastic arm 311 and the second elastic arm 312 in a state of mutual clamping. Under vibration and other environments, the elastic pin 31 is not easy to loosen and has higher reliability.

[0044] In practical applications, the outer side of the second section of the pipe body 12 is provided with an external thread structure, which can be used for threaded connection with the cover of the hot water tank 110.

[0045] like Figure 2 and Figure 7 As shown, this utility model also provides a water heater, including a hot water tank 110, and a pipe connection structure for the hot water tank, wherein the first pipe 1 of the pipe connection structure is fixedly connected to the hot water tank 110.

[0046] In practical applications, an insulation coating can be applied to the outside of the hot water tank 110 to improve its insulation effect.

[0047] This utility model provides a pipe connection structure for a hot water tank and a water heater. The first pipe body 1 is fixed to the hot water tank 110 and communicates with the inner cavity of the hot water tank 110. The first pipe body 1 includes a first pipe section 11 and a second pipe section 12. The first pipe section 11 and the second pipe section 12 are coaxially arranged and integrally connected. The outer diameter of the first pipe section 11 is larger than the outer diameter of the second pipe section 12. The first pipe body 1 has a stepped shaft shape. The front end of the second tube body 2 is inserted into the first tube body 11, so that the second tube body 2 is connected to the first tube body 1; the first tube body 11 has at least one set of opposing pin grooves 101, the pin grooves 101 extending from the outside to the inside of the first tube body 11; the tube body connection structure also includes an elastic pin 31, the elastic pin 31 has a first elastic arm 311 and a second elastic arm 312 that can be elastically opened, the elastic pin 31 is inserted into the pin groove 101, the first elastic arm 311 and the second elastic arm 312 extend into the pin groove 101 and clamp each other on both sides of the second tube body 2, the outer periphery of the second tube body 2 is provided with an anti-detachment protrusion 21, the anti-detachment protrusion 21 extends into the first tube body 11, and the side of the anti-detachment protrusion 21 away from the front end abuts against the first elastic arm 311 and the second elastic arm 312. The first section of the tube body 11 is provided with a threaded through hole, and the threaded through hole is connected to an anti-loosening screw 32. The side of the anti-loosening protrusion 21 away from the front end also abuts against the anti-loosening screw 32. The anti-loosening screw 32 works in conjunction with the first elastic arm 311 and the second elastic arm 312 of the elastic pin 31 to make the anti-loosening protrusion 21 abut at least three points to prevent the anti-loosening protrusion 21 from sliding in the direction of exiting the first tube body 1. When installed, the elastic pin 31 can be inserted into the pin groove 101. The anti-loosening screw 32 and the elastic pin 31 block the anti-loosening protrusion 21 radially. Even under long-term use or when the second tube body 2 is pulled, the anti-loosening screw 32 and the elastic pin 31 can still reliably limit the anti-loosening protrusion 21 to prevent the second tube body 2 from loosening or separating from the first tube body 1. The sealing reliability is high, and the anti-loosening screw 32 and the elastic pin 31 are easy to install and remove, and easy to assemble and maintain.

[0048] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pipe connection structure for a hot water tank, characterized in that, It includes a first pipe body and a second pipe body. The first pipe body is fixed to the hot water tank and communicates with the inner cavity of the hot water tank. The first pipe body includes a first pipe section and a second pipe section. The first pipe section and the second pipe section are coaxially arranged and integrally connected. The outer diameter of the first pipe section is larger than the outer diameter of the second pipe section. The front end of the second pipe body is inserted into the first pipe section, so that the second pipe body communicates with the first pipe body. The first tube section has at least one set of opposing pin slots, which extend from the outer side to the inner side of the first tube section. The tube connection structure also includes an elastic pin, which has a first elastic arm and a second elastic arm that can be elastically opened. The elastic pin is inserted into the pin slot, and the first elastic arm and the second elastic arm extend into the pin slot and clamp each other on both sides of the second tube. The outer periphery of the second tube is provided with an anti-detachment protrusion, which extends into the first tube section. The side of the anti-detachment protrusion away from the front end abuts against the first elastic arm and the second elastic arm. The first section of the tube is provided with a threaded through hole, and the threaded through hole is connected to an anti-loosening screw. The side of the anti-loosening protrusion away from the front end also abuts against the anti-loosening screw.

2. The pipe connection structure of a hot water tank as described in claim 1, characterized in that, The elastic pin is integrally bent from a metal wire or a metal sheet. The elastic pin includes an arc-shaped elastic bending portion. The first end of the first elastic arm and the first end of the second elastic arm are integrally connected to the two ends of the elastic bending portion. The middle parts of the first elastic arm and the second elastic arm are arc-shaped and fit against the outer arc surface of the second tube. The second end of the first elastic arm and the second end of the second elastic arm are both integrally provided with guide portions.

3. The pipe connection structure of a hot water tank as described in claim 2, characterized in that, The outer periphery of the elastic pin is fitted with an elastic silicone sleeve.

4. The pipe connection structure of a hot water tank as described in claim 3, characterized in that, The surface of the elastic silicone sleeve is provided with anti-slip raised texture.

5. The pipe connection structure of a hot water tank as described in claim 2, characterized in that, The elastic bending part is connected to a ring fastener.

6. A pipe connection structure for a hot water tank as described in any one of claims 1 to 5, characterized in that, The outer periphery of the front end of the second tube is provided with an annular groove, and a sealing ring is provided in the annular groove. When the front end of the second tube is inserted into the first tube section, the sealing ring abuts against the inner side of the first tube section.

7. The pipe connection structure of a hot water tank as described in claim 6, characterized in that, At least two annular grooves are provided, and each annular groove is spaced apart along the axial direction of the second tube. The sealing ring is an O-ring, and at least two of the sealing rings have different wire diameters.

8. The pipe connection structure of a hot water tank as described in claim 6, characterized in that, The front end face of the second tube body faces the end face of the second tube segment, and an annular flat gasket is provided between the front end face of the second tube body and the end face of the second tube segment.

9. A pipe connection structure for a hot water tank as described in any one of claims 1 to 5, characterized in that, The inner diameter of the second section of the tube is equal to the inner diameter of the second tube body.

10. A water heater, comprising a hot water tank, characterized in that, The hot water tank includes a pipe connection structure according to any one of claims 1-9, wherein the first pipe of the pipe connection structure is connected to the hot water tank.

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