Plastic insert special for small loose joint of water heater

Abstract

The utility model relates to a special plastic insert for a small loose joint of a water heater, which belongs to the technical field of small loose joints of water heaters and comprises a connecting main body, a sleeve is rotatably mounted on the surface of the connecting main body, a connecting pipe is fixedly mounted on the surface of the sleeve, and a connecting component is arranged at one end of the connecting pipe. The connecting assembly comprises a plastic inner pipe fixedly installed at one end of the connecting pipe, a metal outer pipe is fixedly installed on the surface of the plastic inner pipe, and a connecting nut is rotationally installed on the surface of the metal outer pipe. According to the plastic insert special for the small loose joint of the water heater, a connecting assembly is arranged at one end of a connecting pipe, a plastic inner pipe is arranged in a metal outer pipe, so that water does not make contact with the metal outer pipe, the plastic insert is in threaded connection with an external pipeline through a connecting nut, and the external pipeline extends into the connecting nut and abuts against one side of a connecting ring plate; the plastic inner pipe is directly communicated with the plastic inner pipe and does not make contact with the connecting nut, so that water flow does not make contact with metal at the connecting position, and water using health is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of small flexible joints of water heaters, in particular to a special plastic insert for small flexible joints of water heaters. Background Art

[0002] At present, water heaters are household appliances commonly used in people's daily lives. Water heaters are usually equipped with a water tank and an electric heating pipe arranged in the water tank. The motor heat pipe heats the water in the water tank after being energized. At the same time, the water tank is connected with an inlet pipe and an outlet pipe. Cold water enters the water tank through the inlet pipe, and the hot water in the water tank is output from the outlet pipe. The small flexible joint of the water heater is an indispensable component in the installation and connection of the water heater. Its main function is to allow the water pipe of the water heater to rotate flexibly within a certain range, so as to better adapt to the installation environment and solve the angle problem, and at the same time facilitate future maintenance and disassembly.

[0003] Small unions usually consist of two parts, one part is connected to the water pipe of the water heater, and the other part is connected to the inlet and outlet water pipes. The interface adopts threaded or hot-melt connection to ensure the stability and sealing of the connection. The common material is polypropylene random copolymer, which has good high temperature resistance and corrosion resistance. When installing the water heater, it is necessary to select a suitable small union for connection according to the position and angle of the water pipe of the water heater and the inlet and outlet water pipes. During installation, it is necessary to pay attention to the cleanliness and dryness of the interface to ensure the stability and sealing of the connection. During use, the small union of the water heater can allow the water pipe to move freely within a certain range, thereby avoiding stress concentration and damage to the pipe caused by temperature changes or changes in installation position.

[0004] However, of the two connecting ends of a common small joint of a water heater, one end is usually a hot-melt connection, and the other end is usually a metal connecting part. In order to ensure healthy water use, most of the materials of the small joint are plastic, and this part of the metal connecting part will cause water to contact with metal, affecting healthy water use. In view of this, the present application proposes a special plastic insert for a small joint of a water heater. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a special plastic insert for small joints of water heaters, which has the advantages of preventing water from contacting metal parts, etc., and solves the problem that for the sake of healthy water use, most of the materials of small joints are plastic, while the metal connecting parts at one end will cause water to contact metal, affecting healthy water use.

[0006] To achieve the above object, the utility model provides the following technical solution: a special plastic insert for a small flexible joint of a water heater, comprising a connecting body, a sleeve is rotatably mounted on the surface of the connecting body, a connecting pipe is fixedly mounted on the surface of the sleeve, and a connecting assembly is arranged at one end of the connecting pipe;

[0007] The connecting assembly includes a plastic inner tube fixedly installed at one end of the connecting tube, a metal outer tube fixedly installed on the surface of the plastic inner tube, a connecting nut rotatably installed on the surface of the metal outer tube, a rotating groove is opened inside the connecting nut, and a connecting ring plate adapted to the rotating groove is fixedly installed at one end of the plastic inner tube.

[0008] Furthermore, a compression seal ring is fixedly installed on the inner side wall of the rotating groove, one side of the compression seal ring contacts the side of the connecting ring plate close to the plastic inner tube, and a connecting seal ring is embedded on the side of the connecting ring plate away from the plastic inner tube.

[0009] Furthermore, a hot melt pipe is fixedly installed on the top of the connecting body, and a flow channel having an inner diameter equal to that of the hot melt pipe is opened on the top of the connecting body.

[0010] Furthermore, four communication holes are provided on the surface of the connection body, and the communication holes are connected to the flow channel.

[0011] Furthermore, a water collecting annular groove is provided on the inner side wall of the sleeve, the water collecting annular groove is connected with the connecting hole, two rotating sealing rings are fixedly installed on the inner side wall of the sleeve, and the water collecting annular groove is located between the two rotating sealing rings.

[0012] Furthermore, an output hole is provided on the surface of the sleeve, the output hole is connected to the water collecting ring groove, and the output hole is connected to the internal channel of the connecting pipe.

[0013] Furthermore, a fixing ring is fixedly installed on the surface of the connecting body, the top of the sleeve contacts the bottom of the fixing ring, a connecting external thread is opened on the surface of the connecting body near the bottom end, a mounting nut is threadedly installed on the surface of the connecting body near the bottom end, and the top of the mounting nut contacts the bottom of the sleeve.

[0014] Compared with the prior art, the utility model provides a special plastic insert for a small joint of a water heater, which has the following beneficial effects:

[0015] The special plastic insert for the small joint of the water heater is arranged by setting a connecting component at one end of the connecting pipe and setting a plastic inner pipe inside the metal outer pipe, so that water does not contact the metal outer pipe. It is threadedly connected to the external pipe through a connecting nut. The external pipe extends into the connecting nut and abuts against one side of the connecting ring plate, and is directly connected to the plastic inner pipe without contacting the connecting nut. Therefore, the water flow does not contact the metal at the connection point, which improves water safety. This solves the problem that most of the materials of the small joint are plastic for healthy water use, while the metal connecting component at one end will cause water to contact metal, affecting water safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a front view of the structure of the utility model;

[0018] Figure 3 This is a front cross-sectional view of the connection assembly of the utility model;

[0019] Figure 4 It is a three-dimensional schematic diagram of the connection body of the utility model.

[0020] In the figure: 1, connecting body; 101, connecting external thread; 2, sleeve; 21, output hole; 3, connecting pipe; 4, connecting assembly; 41, plastic inner tube; 42, metal outer tube; 43, connecting nut; 431, rotating groove; 44, connecting ring plate; 5, tightening sealing ring; 6, connecting sealing ring; 7, hot melt pipe; 8, flow channel; 9, connecting hole; 10, water collecting ring groove; 11, rotating sealing ring; 12, fixing ring; 13, installing nut. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Example 1: Please refer to Figure 1-4 A plastic insert for a small flexible joint of a water heater comprises a connecting body 1, a sleeve 2 is rotatably mounted on the surface of the connecting body 1, a connecting pipe 3 is fixedly mounted on the surface of the sleeve 2, and a connecting assembly 4 is arranged at one end of the connecting pipe 3.

[0023] Among them, the connecting component 4 includes a plastic inner tube 41 fixedly installed at one end of the connecting tube 3, a metal outer tube 42 is fixedly installed on the surface of the plastic inner tube 41, a connecting nut 43 is rotatably installed on the surface of the metal outer tube 42, a rotating groove 431 is opened inside the connecting nut 43, and a connecting ring plate 44 adapted to the rotating groove 431 is fixedly installed at one end of the plastic inner tube 41.

[0024] When connecting with the external pipe, the external pipe is threadedly connected to the connecting nut 43, the external pipe extends into the connecting nut 43, contacts the connecting ring plate 44, tightens the connecting nut 43, one end of the external pipe abuts against one side of the connecting ring plate 44, and one side of the rotating groove 431 abuts against one side of the connecting ring plate 44. The water flows in the external pipe and the plastic inner tube 41 without contacting metal parts, thereby improving water health.

[0025] Secondly, a compression seal ring 5 is fixedly installed on the inner wall of the rotating groove 431, one side of the compression seal ring 5 contacts the side of the connecting ring plate 44 close to the plastic inner tube 41, and a connecting seal ring 6 is embedded on the side of the connecting ring plate 44 away from the plastic inner tube 41. One end of the external pipe abuts against one side of the connecting ring plate 44, and at the same time, the connecting seal ring 6 is compressed to increase the sealing of the connection. One side of the rotating groove 431 abuts against one side of the connecting ring plate 44, so that the compression seal ring 5 is compressed between the rotating groove 431 and the connecting ring plate 44, further improving the sealing performance and preventing leakage.

[0026] Meanwhile, a hot melt pipe 7 is fixedly installed at the top of the connection body 1 , and a flow channel 8 having an inner diameter equal to that of the hot melt pipe 7 is opened at the top of the connection body 1 , and an external pipeline is connected through the hot melt pipe 7 .

[0027] There are four communication holes 9 on the surface of the connection body 1 , and the communication holes 9 are connected to the flow channel 8 .

[0028] At the same time, a water collecting groove 10 is opened on the inner wall of the sleeve 2, and the water collecting groove 10 is connected to the connecting hole 9. Two rotating sealing rings 11 are fixedly installed on the inner wall of the sleeve 2, and the water collecting groove 10 is located between the two rotating sealing rings 11.

[0029] The surface of the sleeve 2 is provided with an output hole 21, which is connected to the water collecting annular groove 10, and the output hole 21 is connected to the internal channel of the connecting pipe 3. Water flows into the flow channel 8 through the hot-melt pipe 7, enters the water collecting annular groove 10 through the connecting hole 9, and enters the connecting pipe 3 through the output hole 21, forming a passage.

[0030] Embodiment 2: Based on Embodiment 1, a fixing ring 12 is fixedly installed on the surface of the connection body 1, the top of the sleeve 2 is in contact with the bottom of the fixing ring 12, a connecting external thread 101 is provided on the surface of the connection body 1 near the bottom, a mounting nut 13 is threadedly installed on the surface of the connection body 1 near the bottom, and the top of the mounting nut 13 is in contact with the bottom of the sleeve 2. The sleeve 2 is sleeved on the surface of the connection body 1, so that the sleeve 2 can be rotated freely on the surface of the connection body 1, and the direction of the connection pipe 3 is adjusted. After the adjustment is completed, the mounting nut 13 is locked to complete the installation.

[0031] When this embodiment is in use, the external pipe is threadedly connected to the connecting nut 43, the external pipe extends into the connecting nut 43, contacts the connecting ring plate 44, and the connecting nut 43 is tightened. One end of the external pipe is against one side of the connecting ring plate 44, pressing the connecting sealing ring 6 to increase the sealing of the connection. One side of the rotating groove 431 is against one side of the connecting ring plate 44, so that the pressing sealing ring 5 is pressed against the rotating groove 431 and the connecting ring plate 44, further improving the sealing performance and preventing leakage. The water flows in the external pipe and the plastic inner tube 41 without contacting metal parts, thereby improving the health of water use.

[0032] The electrical components appearing in the article are all electrically connected to the main controller and the power supply. The main controller can be a conventional known device for control such as a computer, and the existing public power connection technology is not described in detail in the article.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A plastic insert for a small flexible joint of a water heater, comprising a connecting body (1), characterized in that: A sleeve (2) is rotatably mounted on the surface of the connection body (1), a connection pipe (3) is fixedly mounted on the surface of the sleeve (2), and a connection assembly (4) is provided at one end of the connection pipe (3); The connection assembly (4) comprises a plastic inner tube (41) fixedly mounted on one end of the connection tube (3); a metal outer tube (42) is fixedly mounted on the surface of the plastic inner tube (41); a connecting nut (43) is rotatably mounted on the surface of the metal outer tube (42); a rotating groove (431) is provided inside the connecting nut (43); and a connecting ring plate (44) adapted to the rotating groove (431) is fixedly mounted on one end of the plastic inner tube (41).

2. A special plastic insert for small joints of water heaters according to claim 1, characterized in that: A compression seal ring (5) is fixedly mounted on the inner side wall of the rotating groove (431), one side of the compression seal ring (5) is in contact with a side of the connecting ring plate (44) close to the plastic inner tube (41), and a connecting seal ring (6) is embedded on a side of the connecting ring plate (44) away from the plastic inner tube (41).

3. A special plastic insert for small joints of water heaters according to claim 1, characterized in that: A hot-melt pipe (7) is fixedly mounted on the top of the connecting body (1), and a flow channel (8) having an inner diameter equal to that of the hot-melt pipe (7) is provided on the top of the connecting body (1).

4. A special plastic insert for small joints of water heaters according to claim 3, characterized in that: Four communication holes (9) are provided on the surface of the connection body (1), and the communication holes (9) are connected to the flow channel (8).

5. A special plastic insert for small joints of water heaters according to claim 4, characterized in that: The inner wall of the sleeve (2) is provided with a water collecting annular groove (10), which is connected to the connecting hole (9). Two rotating sealing rings (11) are fixedly installed on the inner wall of the sleeve (2), and the water collecting annular groove (10) is located between the two rotating sealing rings (11).

6. A special plastic insert for small joints of water heaters according to claim 5, characterized in that: An output hole (21) is provided on the surface of the sleeve (2), the output hole (21) is connected to the water collecting ring groove (10), and the output hole (21) is connected to the internal channel of the connecting pipe (3).

7. A special plastic insert for small joints of water heaters according to claim 1, characterized in that: A fixing ring (12) is fixedly mounted on the surface of the connecting body (1), the top of the sleeve (2) contacts the bottom of the fixing ring (12), a connecting external thread (101) is provided on the surface of the connecting body (1) near the bottom, a mounting nut (13) is threadedly mounted on the surface of the connecting body (1) near the bottom, and the top of the mounting nut (13) contacts the bottom of the sleeve (2).

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