Bent pipe assembly, smoke pipe and gas water heater

Abstract

The utility model belongs to hot water equipment technical field, specifically disclose a kind of elbow assembly, flue and gas water heater, elbow assembly includes inner elbow pipe, outer elbow pipe, inner joint and outer joint, outer elbow pipe is fixedly sleeved in inner elbow pipe outside;Inner joint is connected with inner elbow pipe;Outer joint is sleeved in outer joint, outer joint includes first large diameter section and first small diameter section, first large diameter section is connected with outer elbow pipe, first small diameter section is connected in the end of first large diameter section away from outer elbow pipe, the maximum outer diameter of first large diameter section is greater than the maximum outer diameter of first small diameter section.Flue includes above-mentioned elbow assembly, and gas water heater includes above-mentioned flue.The above-mentioned elbow assembly, flue and gas water heater installation is convenient.

Description

Technical Field

[0001] This utility model relates to the field of hot water equipment technology, and in particular to a bend assembly, flue pipe and gas water heater. Background Technology

[0002] In recent years, with economic development and scientific and technological progress, people's living standards have greatly improved, and gas water heaters have begun to enter thousands of households. However, ordinary gas water heaters extract oxygen from the room for combustion during operation, thereby reducing the indoor oxygen content and posing a potential threat to users' lives. Therefore, the application of balanced flue gas water heaters is becoming increasingly widespread.

[0003] Balanced flue gas water heaters use a double-layer flue design to draw in outdoor air for combustion, while exhaust gases are discharged outdoors through the inner flue, avoiding waste of indoor space. However, in currently available balanced flue gas water heaters, the outer diameter of the outer flue is usually larger than that of a regular gas water heater. Therefore, if you need to replace a regular gas water heater with a balanced flue gas water heater, the existing mounting holes need to be enlarged, making installation inconvenient. Utility Model Content

[0004] One of the technical problems solved by this utility model is to provide a pipe bending assembly that can complete the installation of the flue without additional hole enlargement, thereby improving the convenience of flue installation.

[0005] The second technical problem solved by this utility model is to provide a flue pipe that can be installed without additional hole enlargement, thereby improving installation convenience;

[0006] The third technical problem solved by this utility model is to provide a gas water heater that can be installed without additional enlargement of the hole, thus improving convenience.

[0007] The first technical problem mentioned above is solved by the following technical solution:

[0008] A pipe bend assembly includes an inner bend, an outer bend, an inner connector, and an outer connector; the outer bend is fixedly sleeved outside the inner bend; the inner connector is connected to the inner bend; the outer connector is sleeved outside the inner connector, and the outer connector includes a first large-diameter section and a first small-diameter section, the first large-diameter section is connected to the outer bend, the first small-diameter section is connected to the end of the first large-diameter section away from the outer bend, and the maximum outer diameter of the first large-diameter section is greater than the maximum outer diameter of the first small-diameter section.

[0009] Compared with the prior art, the bend assembly of this utility model has the following advantages: the outer pipe assembly can connect to an extended outer pipe that matches the size of the original mounting hole through a variable-diameter outer connector, so that the flue can pass through the smaller mounting hole to the outside without enlarging the hole, thus improving the convenience of installation.

[0010] In one embodiment, the inner bend includes two fixedly connected inner bend half-shells, and / or the outer bend includes two fixedly connected outer bend half-shells.

[0011] In one embodiment, the surfaces of the inner bend and / or the outer bend are smooth.

[0012] In one embodiment, the inner connector includes a second large-diameter section and a second small-diameter section. The second large-diameter section is connected to the inner bend, and the second small-diameter section is connected to the end of the second large-diameter section away from the inner bend. The maximum outer diameter of the second large-diameter section is greater than the maximum outer diameter of the second small-diameter section.

[0013] In one embodiment, a guide rail is provided on one of the inner bend and the outer bend, and a protrusion is provided on the other of the inner bend and the outer bend, the protrusion being slidably disposed within the guide rail.

[0014] In one embodiment, the guide rail includes a guide rail body and a closing portion. The guide rail body has a groove for the protrusion to slide on, and both ends of the groove are open. Both ends of the guide rail body are provided with the closing portion, which has a first state of opening the groove and a second state of closing the groove.

[0015] In one embodiment, the closure portion switches from the first state to the second state by bending.

[0016] The second technical problem mentioned above is solved by the following technical solution: a flue, including an extension tube assembly and a bend tube assembly as described in any of the above, wherein the extension tube assembly includes an outer extension tube and an inner extension tube, the outer extension tube is fixedly sleeved outside the inner extension tube, the outer extension tube is connected to the first small diameter section, and the inner extension tube is connected to the inner connector.

[0017] Compared with the prior art, the flue pipe described in this utility model has the following advantages: the outer bend pipe is connected to the extended outer pipe that can pass through the original small mounting hole through the outer joint with the variable diameter, without the need for additional hole enlargement, which improves the installation convenience of the flue pipe.

[0018] In one embodiment, the extended outer tube is provided with an air inlet and an exhaust outlet offset along the axial direction. The exhaust outlet is located on the side of the air inlet away from the bend assembly. An annular end cap is installed on the portion of the gap between the extended inner tube and the extended outer tube between the air inlet and the exhaust outlet.

[0019] In one embodiment, the extended outer tube and / or the extended inner tube are segmented.

[0020] The third technical problem mentioned above is solved by the following technical solution:

[0021] A gas water heater includes a water heater body and a flue pipe as described in any of the above-mentioned embodiments, wherein the inner bend pipe is connected to the exhaust port of the water heater body, and the outer bend pipe is connected to the air inlet of the water heater body.

[0022] Compared with the prior art, the gas water heater described in this utility model has the following beneficial effects:

[0023] The gas water heater provided by this utility model uses a variable-diameter external connector to connect an outer bend pipe and an extended outer pipe that can pass through the original installation hole with a diameter smaller than that of the outer bend pipe, without the need for additional hole enlargement, making installation convenient. Attached Figure Description

[0024] Figure 1 This is an exploded structural diagram of the pipe bend assembly provided in the embodiments of this utility model;

[0025] Figure 2 This is a schematic diagram of the pipe bending assembly provided in the embodiments of this utility model;

[0026] Figure 3 This is a schematic diagram of the structure of the inner bend provided in the embodiment of this utility model;

[0027] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0028] Figure 5 for Figure 3 Enlarged view of point B in the middle;

[0029] Figure 6 This is a schematic diagram of the external bend provided in the embodiment of this utility model;

[0030] Figure 7 for Figure 6 Enlarged view of point C in the middle;

[0031] Figure 8 This is a partial cross-sectional view of the outer tube assembly provided in the embodiment of this utility model;

[0032] Figure 9for Figure 8 Enlarged view of point D in the middle;

[0033] Figure 10 This is a schematic diagram of the structure of the flue provided in the embodiment of this utility model;

[0034] Figure 11 This is a cross-sectional view of the flue provided in an embodiment of the present utility model;

[0035] Figure 12 This is an exploded structural diagram of the extension tube assembly provided in the embodiments of this utility model.

[0036] Label Explanation:

[0037] 1. Bending assembly; 11. Inner bend; 111. Inner bend half-shell; 12. Outer bend; 121. Outer bend half-shell; 13. Inner connector; 131. Second large diameter section; 132. Second small diameter section; 14. Outer connector; 141. First large diameter section; 142. First small diameter section; 15. Guide rail; 151. Guide rail body; 152. Enclosure; 16. Protrusion; 17. Mounting base; 2. Extension tube assembly; 21. Extension inner tube; 22. Extension outer tube; 221. Air inlet; 222. Exhaust outlet; 23. Welding bracket; 24. Annular end cap; 25. Mesh end cap. Detailed Implementation

[0038] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0039] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0040] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0041] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0042] To draw in outdoor air and vent flue gas outdoors, a balanced flue gas water heater consists of at least a first section located indoors and a second section connected to the first section and extending outdoors. The first section typically incorporates a bend to alter the gas flow direction. (Reference) Figures 1-12 As shown, an embodiment of this utility model proposes a bend assembly 1 and a flue pipe. The flue pipe includes an extension pipe assembly 2 and the aforementioned bend assembly 1. The extension pipe assembly 2 includes an inner extension pipe 21 and an outer extension pipe 22. The bend assembly 1 includes an inner bend pipe 11, an outer bend pipe 12, an inner connector 13, and an outer connector 14. The inner bend pipe 11 is used to connect to the exhaust port of a balanced gas water heater, and the outer bend pipe 12 is fixedly sleeved on the outside of the inner bend pipe 11. One end of the inner connector 13 is connected to the inner bend 11, and the other end is connected to the extended inner pipe 21. The inner bend 11, the inner connector 13, and the extended inner pipe 21 together constitute the inner smoke pipe, and an exhaust channel is formed inside the inner smoke pipe. The outer connector 14 is sleeved outside the inner connector 13, and the outer connector 14 is a reducing pipe. The outer connector 14 includes a first large diameter section 141 and a first small diameter section 142. The first large diameter section 141 is connected to the outer bend 12, and the first small diameter section 142 is connected to the end of the first large diameter section 141 away from the outer bend 12 and is connected to the extended outer pipe 22. The maximum outer diameter of the first large diameter section 141 is greater than the maximum outer diameter of the first small diameter section 142. The outer bend 12, the outer connector 14, and the extended outer pipe 22 together constitute the outer smoke pipe, and an air intake channel is formed between the outer smoke pipe and the inner smoke pipe.

[0043] The aforementioned bend assembly 1 and flue pipe utilize a reducing outer connector 14 to connect the outer bend 12 and the extension outer pipe 22 with different outer diameters, so that the outer diameter of the extension outer pipe 22 can be consistent with the diameter of the original mounting hole, thereby smoothly expelling the flue gas to the outside and introducing outdoor air into the room, effectively solving the problem of inconvenient flue pipe installation.

[0044] It is worth emphasizing that the surfaces of the inner bend 11 and / or the outer bend 12 are smooth, which, compared to corrugated pipes, reduces exhaust and intake resistance while effectively controlling costs and processing difficulty. It is understood that "smooth surface" here is relative, meaning the surface does not have the obvious undulations seen in corrugated pipes. The cross-sections of the inner bend 11 and the outer bend 12 can be circular, square, or elliptical; no specific restrictions are imposed here. Taking an elliptical cross-section for both the inner bend 11 and the outer bend 12 as an example, the maximum outer diameter of the inner bend 11 and the outer bend 12 is equal to the longest diameter of the corresponding ellipse, that is, equal to the major axis length of the ellipse.

[0045] Specifically, the inner bend 11 includes two fixedly connected inner bend half-shells 111, and the outer bend 12 includes two fixedly connected outer bend half-shells 121. More specifically, both the inner bend half-shells 111 and the outer bend half-shells 121 are made of stainless steel and are stamped together. To improve sealing and further enhance the structural strength of the inner bend 11 and the outer bend 12, the two inner bend half-shells 111 are welded together, and the two outer bend half-shells 121 are welded together.

[0046] To ensure effective airflow within the intake channel, the inner connector 13 also employs a reducing pipe. The inner connector 13 includes a second large diameter section 131 and a second small diameter section 132. The second large diameter section 131 is connected to the inner bend pipe 11, and the second small diameter section 132 is connected to the end of the second large diameter section 131 away from the outer bend pipe 12 and is connected to the extended inner pipe 21. The maximum outer diameter of the second large diameter section 131 is greater than the maximum outer diameter of the second small diameter section 132.

[0047] refer to Figure 11 As shown, the first large-diameter section 141 of the outer connector 14 is inserted into the outer bend 12 and fixedly connected to the outer bend 12 by spot welding. The first small-diameter section 142 of the outer connector 14 is sleeved on the extension outer pipe 22 and also fixedly connected to the extension outer pipe 22 by spot welding. The second large-diameter section 131 of the inner connector 13 is sleeved on the inner bend 11 and fixedly connected to the inner bend 11 by spot welding. The second small-diameter section 132 of the inner connector 13 is inserted into the extension inner pipe 21 and fixedly connected to the extension inner pipe 21 by spot welding. The method of inserting one end of the outer connector 14 and sleeve the other end of the inner connector 13 is more secure than the method of inserting both ends or sleeve both ends.

[0048] refer to Figures 3-9As shown, to reduce the difficulty of assembling the inner bend 11 into the outer bend 12, and to fix the inner bend 11 inside the outer bend 12, a guide rail 15 is provided on one of the inner bend 11 and the outer bend 12, and a protrusion 16 is provided on the other. The protrusion 16 is slidably disposed within the guide rail 15 and cooperates with the guide rail 15 to limit the position of the inner bend 11. Compared with using the welding bracket 23 to fix the inner bend 11 and the outer bend 12, the cooperative arrangement of the guide rail 15 and the protrusion 16 further reduces the manufacturing cost of the bend assembly 1.

[0049] For example, a protrusion 16 is provided on the inner wall surface of the outer bend 12, and a guide rail 15 is provided on the outer wall surface of the inner bend 11, both the protrusion 16 and the guide rail 15 being arc-shaped. Specifically, both the inner and outer arc surfaces of the outer bend 12 are provided with protrusions 16, and both the inner and outer arc surfaces of the inner bend 11 are correspondingly provided with guide rails 15, to improve the stability of the inner bend 11 when assembled onto the outer bend 12. More specifically, the opposite sides of the outer bend half-shell 121 are provided with inwardly bent first bends, and the two adjacent first bends on the two outer bend half-shells 121 together constitute the protrusion 16; while the opposite sides of the inner bend half-shell 111 are provided with outwardly bent second bends, and there is a gap between the two adjacent second bends on the two inner bend half-shells 111 to form the guide rail 15.

[0050] In one embodiment, the protrusion 16 cooperates with the guide rail 15 to both radially and axially limit the inner bend 11. (See reference...) Figure 4 and Figure 5 As shown, the guide rail 15 includes a guide rail body 151 and a closing part 152. The guide rail body 151 has a sliding groove for the protrusion 16 to slide. Both ends of the sliding groove are open. Both ends of the guide rail body 151 are provided with a closing part 152. The closing part 152 has a first state of opening the sliding groove opening and a second state of closing the sliding groove opening.

[0051] For example, in the two second bends constituting the guide rail 15, both ends of one second bend protrude from the other second bend. The protruding portions are the closing portions 152, which can switch from a first state to a second state to close the opening of the slide groove through bending. Of course, the two closing portions 152 can also be respectively provided on the two second bends.

[0052] During the assembly of the bend assembly 1, two inner bend half-shells 111 are welded together to form an inner bend 11, and the closed portion 152 at the first end of the guide rail 15 is adjusted from a first state to a second state, while the closed portion 152 at the second end of the guide rail 15 is in the first state. Two outer bend half-shells 121 are welded together to form an outer bend 12. Then, the protrusion 16 on the outer bend 12 cooperates with the guide rail 15 on the inner bend 11, and the inner bend 11 is inserted into the outer bend 12 by rotation until the guide rail 15 abuts against the closed portion 152 at the first end of the guide rail 15. Then, the closed portion 152 at the first end of the guide rail 15 is adjusted to the second state to achieve radial and axial positioning of the inner bend 11 and the outer bend 12.

[0053] refer to Figure 10 As shown, to reduce the possibility of flue gas discharged through the exhaust channel re-entering the intake channel, an intake port 221 and an exhaust port 222 are offset axially on the extended outer pipe 22, with the exhaust port 222 located on the side of the intake port 221 away from the bend assembly 1. An annular end cap 24 is installed on the portion of the intake channel between the intake port 221 and the exhaust port 222, preventing the exhaust channel and the intake channel from communicating with each other. Specifically, multiple intake ports 221 and exhaust ports are spaced apart circumferentially along the extended outer pipe 22 to improve ventilation efficiency.

[0054] refer to Figure 11 and Figure 12 As shown, in order to divert the flue gas and prevent it from being directly discharged, a mesh end cap 25 is installed at the end of the extended outer pipe 22 that is away from the bend assembly 1. Compared with a non-perforated end cap, the mesh end cap 25 can reduce the resistance to the flue gas and improve the exhaust efficiency while achieving flue gas diversion.

[0055] Continue to refer to Figure 12 As shown, the extension tube assembly 2 also includes a welding bracket 23, which is disposed between the inner extension tube 21 and the outer extension tube 22 to keep the inner extension tube 21 and the outer extension tube 22 coaxial. During assembly of the extension tube assembly 2, the welding bracket 23 and the annular end cap 24 are welded to the inner extension tube 21, then the inner extension tube 21 is inserted into the outer extension tube 22 and the outer extension tube 22 is welded to the annular end cap 24 and the welding bracket 23, and finally the mesh end cap 25 is welded to the outer extension tube 22.

[0056] Understandably, the length of the extension tube assembly 2 can be selected based on the user's different requirements for the installation location. For convenient transportation, when the required length of the extension tube assembly 2 is long, the extension tube assembly 2 is set in sections. At this time, the extension tube assembly 2 includes at least two extension tube sections. During installation, the number of assembly sections of the extension tube assembly 2 can be selected according to the requirements to adjust the length of the extension tube assembly 2.

[0057] refer to Figure 12As shown, the extension pipe section includes an inner extension pipe section and an outer extension pipe section. Multiple inner extension pipe sections constitute an inner extension pipe 21, and multiple outer extension pipe sections constitute an outer extension pipe 22. Taking the inner extension pipe 21 as an example, the inner extension pipe 21 includes at least two inner extension pipe sections, which are connected by insertion. Specifically, in order to limit the insertion depth between adjacent inner extension pipe sections, one of the two adjacent inner extension pipe sections has a limiting step on its inner wall, and the other can be inserted into the inner extension pipe section with the limiting step and abut against the limiting step.

[0058] More specifically, in order to make the effective flow area of ​​the intake passage corresponding to the extension pipe assembly 2 as consistent as possible, the extension inner pipe section includes a body section and an expansion section. The inner diameter of the expansion section is the same as the outer diameter of the body section, and a limiting step is formed between the expansion section and the body section.

[0059] To improve the connection stability between adjacent extension inner pipe sections, in one embodiment, connection holes are provided on the extension inner pipe sections, and adjacent extension inner pipe sections are fixedly connected by fasteners passing through the connection holes. Compared with welding, bolted connections reduce the dependence on installation tools and are more operable. Similarly, the extension pipe assembly 2 and the bend assembly 1 are also fixedly connected by fasteners.

[0060] The configuration of the extended outer tube 22 is similar to that of the extended inner tube 21, and will not be described in detail here.

[0061] refer to Figure 1 As shown, the bend assembly 1 also includes a mounting base 17, which is sleeved on the outer bend 12 and welded to the outer bend 12. The mounting base 17 is used to fix the bend assembly 1 at the gas inlet and exhaust outlet of the gas water heater.

[0062] An embodiment of this utility model also proposes a gas water heater, including the above-mentioned flue pipe and water heater body, wherein the inner bend 11 of the flue pipe is connected to the exhaust port on the water heater body, and the outer bend 12 of the flue pipe is connected to the air inlet of the water heater body.

[0063] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0064] The specific embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A pipe bend assembly, characterized in that, The bend assembly (1) includes Inner bend (11); The outer bend (12) is fixedly sleeved outside the inner bend (11); An inner connector (13) is connected to the inner bend (11); An external connector (14) is fitted over the internal connector (13). The external connector (14) includes a first large diameter section (141) and a first small diameter section (142). The first large diameter section (141) is connected to the external bend (12). The first small diameter section (142) is connected to the end of the first large diameter section (141) away from the external bend (12). The maximum outer diameter of the first large diameter section (141) is greater than the maximum outer diameter of the first small diameter section (142).

2. The bend assembly according to claim 1, characterized in that, The inner bend (11) includes two inner bend half-shells (111) fixedly connected; and / or, the outer bend (12) includes two outer bend half-shells (121) fixedly connected.

3. The bend assembly according to claim 1, characterized in that, The outer bend (12) and / or the inner bend (11) have smooth surfaces.

4. The bend assembly according to claim 1, characterized in that, The inner connector (13) includes a second large diameter section (131) and a second small diameter section (132). The second large diameter section (131) is connected to the inner bend (11), and the second small diameter section (132) is connected to the end of the second large diameter section (131) away from the inner bend (11). The maximum outer diameter of the second large diameter section (131) is greater than the maximum outer diameter of the second small diameter section (132).

5. The bend assembly according to any one of claims 1-4, characterized in that, One of the inner bend (11) and the outer bend (12) is provided with a guide rail (15), and the other of the inner bend (11) and the outer bend (12) is provided with a protrusion (16), which is slidably disposed within the guide rail (15).

6. The bend assembly according to claim 5, characterized in that, The guide rail (15) includes a guide rail body (151) and a closing part (152). The guide rail body (151) has a groove for sliding the protrusion (16). Both ends of the groove are open. Both ends of the guide rail body (151) are provided with the closing part (152). The closing part (152) has a first state of opening the groove and a second state of closing the groove.

7. The bend assembly according to claim 6, characterized in that, The closed portion (152) switches from the first state to the second state by bending.

8. A chimney, characterized in that, The device includes an extension tube assembly (2) and a bend assembly (1) as described in any one of claims 1-7. The extension tube assembly (2) includes an extension outer tube (22) and an extension inner tube (21). The extension outer tube (22) is fixedly sleeved outside the extension inner tube (21). The extension outer tube (22) is connected to the first small diameter section (142), and the extension inner tube (21) is connected to the inner connector (13).

9. The smoke pipe according to claim 8, characterized in that, The extended outer tube (22) and / or the extended inner tube (21) are arranged in sections.

10. A gas water heater, comprising a water heater body and a flue pipe as described in claim 8 or 9, wherein the inner bend pipe (11) is connected to the exhaust port of the water heater body, and the outer bend pipe (12) is connected to the air inlet of the water heater body.

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