Smoke gas leakage-proof water seal structure and condensing gas heating water heater

Abstract

The utility model discloses a kind of water seal structure and condensing gas heating water heater of smoke gas leakage prevention, which water seal structure includes water seal main body, support seat and float ball, water seal main body is equipped with condensate water inlet, liquid storage cavity, inclined cavity and drain, the intersection of liquid storage cavity and inclined cavity is equipped with communicating port, support seat is equipped with plugging hole, sealing flange and liquid outlet, sealing flange is located above communicating port and sealing flange and the inner wall of liquid storage cavity sealing abut, the part between the lower end of sealing flange of support seat and the inner wall of liquid storage cavity has clearance communicated with communicating port, float ball moves longitudinally in liquid storage cavity and can block plugging hole. The above-mentioned water seal structure is through the effect of float ball and support seat, when chimney exhaust pipe mode is blocked, float ball sinks to the bottom, blocks the plugging hole of support seat, so that the water column in water seal cannot appear all push-out situation, prevent smoke gas from water seal leakage to indoor, increase the safety performance of equipment.

Description

Technical Field

[0001] This utility model relates to the field of drainage and water seal technology, specifically to a water seal structure for preventing flue gas leakage and its condensing gas-fired heating and hot water boiler. Background Technology

[0002] Gas-fired heating and hot water boilers, also known as wall-hung boilers, are domestic boilers that use gas combustion to heat water and provide heating through heating pipes and radiators. Ordinary wall-hung boilers primarily release the heat from combustion directly to the outside through flue gas, resulting in relatively low energy efficiency. Condensing gas-fired heating and hot water boilers, however, recover the heat from the flue gas produced during combustion, converting the latent heat into thermal energy, thereby improving thermal efficiency and achieving energy savings. Since high-temperature flue gas releases heat during condensation upon cooling, collecting this heat increases the heating capacity. However, condensation is also produced during cooling. Typically, wall-hung boilers incorporate waste heat recovery devices and condensate drain seals. These devices collect the acidic condensate, guide it into the condensate drain seal, and then discharge the collected condensate outside the equipment.

[0003] The condensate drain seal is used to collect condensate inside the boiler, serving not only to drain the condensate but also to provide a seal. Traditional gas-fired heating and hot water boilers are limited by their size, resulting in insufficient water seal height. When the flue pipe inside the boiler becomes blocked, the pressure inside the heat exchanger increases. When the pressure rises to a certain level, the flue gas in the flue pipe will force the water accumulated in the water seal device or flow along the drain pipe of the water seal into the room, causing flue gas leakage. In severe cases, this can lead to flue gas poisoning. Furthermore, a typical drain seal only has a single drainage function and cannot detect whether the condensate drain outlet is blocked, causing condensate to flow back into the heat exchanger, potentially damaging the internal structure of the boiler. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, one of the objectives of this utility model is to provide a water seal structure to prevent smoke leakage, thereby solving the above-mentioned traditional problems and effectively preventing smoke from leaking into the room, thus improving the safety of use.

[0005] The second objective of this utility model is to provide a condensing gas-fired heating and hot water boiler that adopts the anti-smoke gas leakage water seal structure.

[0006] One of the objectives of this utility model is achieved through the following technical solution: A water seal structure for preventing flue gas leakage includes a water seal body, a support base and a float installed inside the water seal body. The water seal body has a condensate inlet, a liquid storage chamber located below the condensate inlet, an inclined cavity located on the side of the liquid storage chamber, and a drain outlet. A communication port is provided at the junction of the liquid storage chamber and the inclined cavity. The support base has a top sealing hole, a side sealing flange, and a lower liquid outlet. The sealing flange is located above the communication port and seals against the inner wall of the liquid storage chamber. The portion of the support base located at the lower end of the sealing flange has a gap between it and the inner wall of the liquid storage chamber, which communicates with the communication port. The liquid outlet communicates with the gap. The float moves longitudinally within the liquid storage chamber and can block the sealing hole.

[0007] Preferably, the sealing flange is provided with a sealing groove for installing an O-ring.

[0008] Preferably, the bottom of the support base is an open structure, and the bottom of the liquid storage cavity is provided with a liquid storage plug and a sealing gasket. The liquid storage plug, together with the sealing gasket, seals the bottom of the support base.

[0009] Preferably, the liquid storage plug and the water seal body are connected by threads.

[0010] Preferably, the liquid outlet is one of a U-shaped notch, a circular opening, an elliptical opening, or a square opening.

[0011] Preferably, the angle formed between the inclined cavity and the liquid storage cavity is an acute angle.

[0012] Preferably, the angle formed between the inclined cavity and the liquid storage cavity is 30°-45°.

[0013] Preferably, the top of the inclined cavity is provided with a first mounting position and a second mounting position, the first mounting position is equipped with a liquid level switch, and the second mounting position is equipped with an inclined tube sealing plug.

[0014] Preferably, the first mounting position is arranged parallel to the liquid storage chamber.

[0015] The second objective of this utility model is achieved by the following technical solution: A condensing gas-fired heating and hot water boiler includes the aforementioned water seal structure to prevent flue gas leakage.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. The water seal structure for preventing smoke leakage of this utility model uses the action of a float and a support base. When the chimney exhaust pipe is blocked, the float sinks to the bottom and blocks the sealing hole of the support base, preventing the water column in the water seal from being pushed out completely, thus preventing smoke from leaking from the water seal into the room and increasing the safety performance of the equipment.

[0017] 2. The anti-smoke gas leakage water seal structure of this utility model can prevent the water level from rising to the detection position of the water level switch when the condensate drainage is not smooth, triggering a disconnect signal and causing the equipment to shut down, thereby improving the safety performance of the equipment. Attached Figure Description

[0018] Figure 1 This is an exploded view of the anti-smoke gas leakage water seal structure of this utility model; Figure 2 for Figure 1 The diagram shown is a cross-sectional view of the water seal structure for preventing smoke leakage, in which the condensate water level is at a relatively high position. Figure 3 for Figure 1 The diagram shows a cross-sectional view of the water seal structure for preventing smoke leakage, in which the condensate water level is at a lower position.

[0019] In the diagram: 10. Water seal body; 11. Condensate inlet; 12. Liquid storage chamber; 13. Inclined cavity; 130. First mounting position; 131. Second mounting position; 14. Drain outlet; 15. Liquid storage plug; 16. Sealing gasket; 20. Support base; 21. Sealing hole; 22. Sealing flange; 23. Liquid outlet; 30. Float; 40. Liquid level switch. Detailed Implementation

[0020] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0021] In the description of this utility model, it should be understood that 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 indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0022] In the description of this utility model, it should be understood that when an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be intermediate elements present. Conversely, when an element is referred to as being "directly" connected to another element, there are no intermediate elements.

[0023] Please see Figures 1-3The present invention provides a preferred embodiment of a flue gas leakage prevention water seal structure, which is used to be installed in a gas-fired heating and hot water boiler, especially a condensing gas-fired heating and hot water boiler, to collect condensate and / or rainwater, connect the heat exchanger and the external drain pipe, and form a liquid seal to prevent flue gas from leaking into the room, thereby improving the safety performance of the equipment. Specifically, the anti-smoke gas leakage water seal structure includes a water seal body 10, a support base 20 and a float 30 installed inside the water seal body 10. The water seal body 10 is provided with a condensate inlet 11, a liquid storage chamber 12 located below the condensate inlet 11, an inclined cavity 13 located on the side of the liquid storage chamber 12, and a drain outlet 14. A communication port is provided at the junction of the liquid storage chamber 12 and the inclined cavity 13. The support base 20 is provided with a top sealing hole 21, a side sealing flange 22, and a lower liquid outlet 23. The sealing flange 22 is located above the communication port and seals against the inner wall of the liquid storage chamber 12. The part of the support base 20 located at the lower end of the sealing flange 22 has a gap between it and the inner wall of the liquid storage chamber 12, which communicates with the communication port. The liquid outlet 23 communicates with the gap. The float 30 moves longitudinally within the liquid storage chamber 12 and can block the sealing hole 21.

[0024] In the above structure, when the liquid level in the water seal body 10 is low or there is no liquid level, the float 30 blocks the sealing hole 21 of the support base 20 to prevent flue gas from leaking from the water seal body 10 into the room. When condensate gradually flows into the water seal body 10 through the condensate inlet 11, according to the principle of buoyancy, the float 30 rises with the water level and moves away from the sealing hole 21, so that the condensate gradually flows from the liquid storage chamber 12 into the inclined chamber 13. Finally, when a certain amount of water is reached, it flows out from the drain outlet 14, thereby effectively preventing flue gas from leaking into the room and improving the safety of the equipment.

[0025] In this embodiment, the sealing flange 22 is provided with a sealing groove for installing an O-ring to improve the sealing performance of the sealing flange 22.

[0026] In one embodiment, the bottom of the support base 20 is an open structure. The bottom of the liquid storage chamber 12 is provided with a liquid storage plug 15 and a sealing gasket 16. The liquid storage plug 15, together with the sealing gasket 16, seals the bottom of the support base 20. This allows the support base 20 to be sealed after installation, controlling the outflow of condensate from the liquid outlet 23. Furthermore, under high water pressure, some condensate can flow through the bottom of the support base 20 into the gap and then be discharged externally. The liquid storage plug 15 is threadedly connected to the water seal body 10. Optionally, the liquid outlet 23 may be, but is not limited to, a U-shaped notch. In other embodiments, the liquid outlet 23 may also be a circular, elliptical, or square opening, etc.

[0027] In this embodiment, the inclined cavity 13 is inclined, and the angle formed between the inclined cavity 13 and the liquid storage cavity 12 is an acute angle, specifically, the angle formed between the inclined cavity 13 and the liquid storage cavity 12 is 30°-45°. In one embodiment, the top of the inclined cavity 13 is provided with a first mounting position 130 and a second mounting position 131. The first mounting position 130 is equipped with a liquid level switch 40 for monitoring the liquid level in the inclined cavity 13 / liquid storage cavity 12. When the water level rises to the position of the liquid level switch 40, a liquid level signal is triggered, and the hot water boiler is shut down. The second mounting position 131 is equipped with an inclined tube sealing plug for easy subsequent installation or connection of other equipment. Optionally, the first mounting position 130 is parallel to the liquid storage chamber 12. The signal trigger point of the level switch 40 is located between the condensate inlet 11 and the sealing hole 21, which provides sufficient space for the float 30 to move and facilitates the storage of a portion of the liquid level in the liquid storage chamber 12 to form a liquid seal. The specific installation distance of the level switch 40 can be set according to specific needs, and will not be elaborated here. Optionally, the first mounting position 130 is also equipped with a mounting nut, an O-ring, and a mounting sealing joint. The mounting nut, O-ring, mounting sealing joint, and other accessories are used to install the level switch 40 to facilitate its fixation.

[0028] In this embodiment, the drain outlet 14 is a vertically arranged drain pipe. One end of the drain pipe is connected to the upper end of the inclined cavity 13, and the other end of the drain pipe is connected to an external pipe to facilitate the discharge of condensate. A fixed connection is provided between the lower end of the drain pipe and the liquid storage cavity 12 to facilitate the fixing of the two.

[0029] In other embodiments, the present invention also provides a condensing gas-fired heating and hot water boiler, including the anti-smoke gas leakage water seal structure of any of the above embodiments. The condensing gas-fired heating and hot water boiler also includes a condensing heat exchanger. The condensate discharge port of the condensing heat exchanger is connected to the condensate inlet 11 of the anti-smoke gas leakage water seal structure through a hose. The drain port 14 is connected to an external pipe through a hose to discharge the collected condensate to the anti-smoke gas leakage water seal structure and then discharge it through the drain port 14. Its technical effect is the same as that of the water seal structure described above, and will not be repeated here.

[0030] In the above embodiments, the float 30 is a device that works based on the principle of buoyancy (Archimedes' principle). When the liquid or gas environment changes, the float will float up and down with the rise and fall of the liquid level or the change of pressure. It can be a hollow metal float, a plastic float, a foam float, a rubber float, etc., and the selection is made according to specific requirements, which will not be elaborated here.

[0031] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0032] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the 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 smoke gas leak-proof water seal structure, characterized by, The device includes a water seal body, a support base installed inside the water seal body, and a float. The water seal body has a condensate inlet, a liquid storage chamber located below the condensate inlet, an inclined cavity located on the side of the liquid storage chamber, and a drain outlet. A communication port is provided at the junction of the liquid storage chamber and the inclined cavity. The support base has a top sealing hole, a side sealing flange, and a lower liquid outlet. The sealing flange is located above the communication port and seals against the inner wall of the liquid storage chamber. The portion of the support base located at the lower end of the sealing flange has a gap between it and the inner wall of the liquid storage chamber, which communicates with the communication port. The liquid outlet communicates with the gap. The float moves longitudinally within the liquid storage chamber and can block the sealing hole.

2. The anti-smoke gas leakage water seal structure according to claim 1, characterized in that, The sealing flange is provided with a sealing groove for installing an O-ring.

3. The anti-smoke gas leakage water seal structure according to claim 1, characterized in that, The bottom of the support base is an open structure, and the bottom of the liquid storage chamber is provided with a liquid storage plug and a sealing gasket. The liquid storage plug, together with the sealing gasket, seals the bottom of the support base.

4. The anti-smoke gas leakage water seal structure according to claim 3, characterized in that, The liquid storage plug is threadedly connected to the water seal body.

5. The anti-smoke gas leakage water seal structure according to claim 1, characterized in that, The liquid outlet is one of a U-shaped notch, a circular opening, an elliptical opening, or a square opening.

6. The anti-smoke gas leakage water seal structure according to claim 1, characterized in that, The angle formed between the inclined cavity and the liquid storage cavity is an acute angle.

7. The anti-smoke gas leakage water seal structure according to claim 6, characterized in that, The angle formed between the inclined cavity and the liquid storage cavity is 30°-45°.

8. The anti-smoke gas leakage water seal structure according to claim 1, characterized in that, The top of the inclined cavity is provided with a first mounting position and a second mounting position. A liquid level switch is installed at the first mounting position, and an inclined tube sealing plug is installed at the second mounting position.

9. The anti-smoke gas leakage water seal structure according to claim 8, characterized in that, The first mounting position is arranged parallel to the liquid storage chamber.

10. A condensing gas-fired heating and hot water boiler, characterized in that, Including the smoke gas leakage prevention water seal structure as described in any one of claims 1-9.

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