Smoke exhaust pipe of boiler

Abstract

The utility model discloses a boiler smoke exhaust pipe, belongs to the technical field of boiler accessories, and provides a boiler smoke exhaust pipe capable of effectively preventing airflow from flowing backwards. The boiler smoke exhaust pipe comprises an inner pipe body and an outer pipe body, the upper end of the inner pipe body is a first horizontal section, and the lower end of the outer pipe body is a second horizontal section; the end of the second horizontal section and the end of the first horizontal section are fixed through a connecting piece, a receding groove is formed in the first horizontal section, the first horizontal section is provided with a one-way opening door in the receding groove, the one-way opening door comprises a configuration ring clamped in the receding groove, and the inner diameter of the configuration ring is larger than that of the first horizontal section. The inner diameter of the configuration ring is smaller than or equal to that of the second horizontal section, and the configuration ring is rotationally connected with two half-moon plates through two parallel limiting shafts on the inner wall. The smoke exhaust pipe is divided into the two sections, each section is provided with the horizontal part, the one-way opening door structure is arranged between the end faces of the horizontal parts, normal smoke exhaust can be achieved, rainwater can be effectively prevented from flowing backwards, and therefore the safety of the boiler is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of boiler accessories, in particular to a boiler exhaust pipe. BACKGROUND

[0002] A large amount of flue gas will be generated when the boiler is working, which needs to be discharged to the atmosphere through the exhaust pipe. The existing exhaust pipe is mostly straight, and the top opening is provided with a shielding part to prevent rainwater from flowing back and damaging the boiler. However, when it is windy, the airflow in the air is relatively turbulent, and the airflow may enter the exhaust pipe from below the shielding part, thereby flowing back into the boiler, which not only affects the normal operation of the boiler, but also needs to be cleaned afterwards, which is troublesome. SUMMARY

[0003] The purpose of the present application is to provide a boiler exhaust pipe that can effectively prevent airflow from flowing back.

[0004] To achieve the above purpose, the present application provides a boiler exhaust pipe: comprising an inner pipe body and an outer pipe body, the upper end of the inner pipe body is a first horizontal section, the lower end of the outer pipe body is a second horizontal section, the second horizontal section and the end of the first horizontal section are fixed by a connecting piece, the first horizontal section is provided with a gap slot, the first horizontal section is provided with a one-way opening door in the gap slot, the one-way opening door comprises a configuration ring clamped in the gap slot, the inner diameter of the configuration ring is greater than the inner diameter of the first horizontal section, the inner diameter of the configuration ring is less than or equal to the inner diameter of the second horizontal section, and the configuration ring is rotatably connected to two menisci through two parallel limiting shafts of the inner wall.

[0005] As a preferred, the inner top wall and the inner bottom wall of the configuration ring are both blocking planes, the two limiting shafts are fixedly connected between the two blocking planes and are both vertical, the menisci are semicircular, the two ends of the menisci along the chord line extension direction are insertion faces, the menisci are provided with shaft holes penetrating through the two insertion faces, and the shaft holes are suitable for cooperating with the limiting shafts to form a rotating pair and limit the movement freedom degree of the menisci.

[0006] As a preferred, the end of the first horizontal section away from the one-way opening door has a downward extending first vertical section, the lower end of the first vertical section is suitable for connecting with the exhaust port of the boiler, and the end of the second horizontal section away from the one-way opening door has an upward extending second vertical section, and the flue gas with lift force is discharged upward.

[0007] As a preferred, the lower end of the first vertical section has a connecting disc, the bottom of the connecting disc has a coaxial plug-in ring suitable for being embedded into the exhaust port of the boiler, and has good stability and sealing effect.

[0008] As a preferred, the upper end of the second vertical section is fixedly connected with a rain cover through a support rod, the rain cover is a right-angled cone, the lower end of the rain cover has a larger diameter than the upper end of the second vertical section, and can completely cover the upper open end of the second vertical section.

[0009] As a preferred, the lower end edge of the rain cover is not higher than the upper end edge of the second vertical section, further preventing the airflow and rainwater from entering the upper open end of the second vertical section.

[0010] As a preferred, the end of the first horizontal section has a first connecting ring expanding outward, the first connecting ring is provided with a first through hole, the end of the second horizontal section has a second connecting ring expanding outward, the second connecting ring is provided with a second through hole, the connecting piece includes a bolt and a nut, the bolt passes through the first through hole and the second through hole and cooperates with the nut, and the fixing is realized by screwing, so that the stability is high and the disassembly and assembly are convenient.

[0011] As a preferred, the end face of the second connecting ring away from the second horizontal section has a coaxial embedded compression ring, which is suitable for being embedded in the accommodation groove to compress the configuration ring, and the configuration ring can be well maintained without hard connection, and the disassembly and assembly are also convenient.

[0012] Compared with the prior art, the application has the beneficial effects that:

[0013] (1) By dividing the smoke exhaust pipe into two sections, each section has a horizontal part, and a one-way opening door structure is arranged between the end faces of the horizontal parts, not only the smoke can be normally exhausted, but also the airflow and rainwater can be effectively prevented from backflowing, thereby improving the safety of the boiler;

[0014] (2) The connecting piece is detachable between the two horizontal sections, so that even if backflow occurs, the rainwater will be left in the second horizontal section, and the connection between the second horizontal section and the first horizontal section is removed, so that the rainwater can be poured out, without the need to clean the inside of the boiler, and the operation is more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a first three-dimensional schematic view of the overall structure of the boiler smoke exhaust pipe.

[0016] Figure 2 It is a second three-dimensional schematic view of the overall structure of the boiler smoke exhaust pipe.

[0017] Figure 3 It is a three-dimensional structure schematic view of the one-way opening door of the boiler smoke exhaust pipe arranged in the inner pipe body.

[0018] Figure 4 It is a three-dimensional structure schematic view of the one-way opening door of the boiler smoke exhaust pipe arranged in the inner pipe body. Figure 3 It is a three-dimensional structure schematic view after removing a half disc.

[0019] Figure 5 It is the schematic diagram of the outer pipe body of the boiler exhaust pipe.

[0020] Figure 6 It is the schematic diagram of the limiting shaft of the boiler exhaust pipe connected in the configuration ring.

[0021] Figure 7 It is the schematic diagram of the meniscus of the boiler exhaust pipe.

[0022] In the figure: 1, inner pipe body; 101, first vertical section; 102, first horizontal section; 103, first connecting ring; 104, first through hole; 105, plug-in ring; 106, connecting disc; 107, accommodation groove; 2, outer pipe body; 201, second horizontal section; 202, second vertical section; 203, support rod; 204, rain cover; 205, embedded pressing ring; 206, second connecting ring; 207, second through hole; 3, connecting piece; 301, bolt; 302, nut; 4, one-way opening door; 401, configuration ring; 402, limiting shaft; 403, meniscus; 404, blocking plane; 405, insertion surface; 406, shaft hole. DETAILED DESCRIPTION

[0023] In the following, the present application will be further described in conjunction with specific embodiments. It should be noted that, under the premise of no conflict, the following description of each embodiment or each technical feature can be combined with any other embodiment or technical feature to form a new embodiment.

[0024] In the description of the present application, it should be noted that, for orientation words, such as terms "center", "transverse", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation and positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and cannot be understood as limiting the specific protection scope of the present application.

[0025] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and do not necessarily describe a specific order or sequence.

[0026] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0027] like Figures 1-7 The boiler exhaust pipe shown includes an inner pipe body 1 and an outer pipe body 2. The inner pipe body 1 is usually installed indoors and directly connected to the boiler. The outer pipe body 2 is usually installed outdoors and connected to the atmosphere. The upper end of the inner pipe body 1 is a first horizontal section 102. The end of the first horizontal section 102 away from the one-way opening door 4 has a first vertical section 101 extending downwards. The lower end of the first vertical section 101 is used to connect to the boiler exhaust port. The lower end of the first vertical section 101 also has a connecting plate 106. The bottom of the connecting plate 106 has a coaxial insertion ring 105, which fits perfectly into the boiler exhaust port. The connecting plate 106 is fixed to the boiler and can form a good annular sealing surface.

[0028] The lower end of the outer pipe 2 is the second horizontal section 201, which, along with the first horizontal section 102, is usually designed as a cylinder, making them suitable for coaxial and collinear installation. The end of the second horizontal section 201 away from the one-way opening door 4 has an upwardly extending second vertical section 202. The upper end of the second vertical section 202 is fixedly connected to a rain cover 204 via a support rod 203. There are several support rods 203, which are equidistantly arranged around the axis of the second vertical section 202. The rain cover 204 is an upright cone shape, meaning that the lower end of the rain cover 204 is larger, and the diameter of the lower end of the rain cover 204 is larger than the diameter of the upper end of the second vertical section 202. Furthermore, the lower edge of the rain cover 204 is not higher than the upper edge of the second vertical section 202, making it difficult for rainwater to flow back into the exhaust pipe.

[0029] The second horizontal segment 201 and the end of the first horizontal segment 102 are fixed together by a connector 3. Specifically, the end of the first horizontal segment 102 has an outwardly expanding first connecting ring 103, which has a plurality of first through holes 104 arranged equidistantly around the axis. The end of the second horizontal segment 201 has an outwardly expanding second connecting ring 206, which has a plurality of second through holes 207 arranged equidistantly around the axis. The connector 3 includes a bolt 301 and a nut 302. The bolt 301 passes through the first through hole 104 and the second through hole 207 and cooperates with the nut 302. The connection is fixed by tightening.

[0030] The first horizontal section 102 is provided with a clearance groove 107, which is actually formed by the inner wall of the first connecting ring 103 and the end face of the first horizontal section 102. The first horizontal section 102 is provided with a one-way opening door 4 in the clearance groove 107. The one-way opening door 4 includes a configuration ring 401 clamped in the clearance groove 107. The inner diameter of the configuration ring 401 is greater than the inner diameter of the first horizontal section 102 and is also less than or equal to the inner diameter of the second horizontal section 201. The second connecting ring 206 has a coaxial embedded compression ring 205 at the end face away from the second horizontal section 201, which is used to be embedded in the clearance groove 107 and compress the configuration ring 401, thereby ensuring the stability of the configuration ring 401.

[0031] The configuration ring 401 is rotatably connected with two menisci 403 through two parallel limiting shafts 402 of the inner wall. The menisci 403 are semicircular. Since the radius of the menisci 403 is less than the radius of the inner wall of the configuration ring 401, it is also necessarily less than the inner wall radius of the second horizontal section 201, so it can swing in a larger range in the second horizontal section 201. However, the radius of the menisci 403 is close to the radius of the inner wall of the configuration ring 401, so it is also necessarily greater than the inner wall radius of the first horizontal section 102, so the menisci 403 will be blocked by the end face of the first horizontal section 102. The inner top wall and the inner bottom wall of the configuration ring 401 are both blocking planes 404. The two blocking planes 404 are parallel to each other. The two limiting shafts 402 are fixedly connected between the two blocking planes 404 and are both vertical. The two ends of the menisci 403 in the chord line extension direction are penetrating surfaces 405. The two penetrating surfaces 405 are parallel to each other but perpendicular to the chord line direction of the menisci 403. The menisci 403 are provided with shaft holes 406 penetrating the two penetrating surfaces 405, which cooperate with the limiting shafts 402 to form a rotating pair to limit the movement freedom of the menisci 403.

[0032] Working principle: when the gas flows from the inner pipe body 1 to the outer pipe body 2, the two menisci 403 move closer to each other under the push of the gas flow, and the smoke exhaust pipe is normally conducted. When there is strong convection weather, the top end gas flow of the smoke exhaust pipe is very unstable and may flow back to the inner pipe body 1 through the outer pipe body 2. At this time, the two menisci 403 will move away from each other under the action of the thrust until they are attached to the end face of the first horizontal section 102, thereby blocking the gas flow and rainwater from flowing back to the boiler through the inner pipe body 1, thereby reducing the probability of damage to the boiler. If rainwater accumulates in the smoke exhaust pipe, the water pressure will press the menisci 403 to maintain a closed state with the first horizontal section 102. In subsequent cleaning, only the outer pipe body 2 needs to be removed from the connecting ring to drain the accumulated water inside, without the need to clean the inside of the boiler.

[0033] The foregoing describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-described embodiments, and the above-described embodiments and descriptions in the specification are only the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.

Claims

1. A boiler flue gas duct, characterized by: The utility model provides a kind of boiler smoke outlet, including inner tube body (1) and outer tube body (2), the upper end of the inner tube body (1) is first horizontal section (102), the lower end of the outer tube body (2) is second horizontal section (201), the second horizontal section (201) is fixed between the end of first horizontal section (102) by connecting piece (3), first horizontal section (102) is provided with one-way opening door (4) in the let slot (107), one-way opening door (4) includes the configuration ring (401) that is clamped in the let slot (107), the inner diameter of the configuration ring (401) is greater than the inner diameter of first horizontal section (102), the inner diameter of the configuration ring (401) is less than or equal to the inner diameter of second horizontal section (201), the configuration ring (401) is rotatably connected with two meniscus (403) by two parallel limit shafts (402) of inner wall.

2. A boiler flue gas duct according to claim 1, characterised in that: The inner top wall and inner bottom wall of the configuration ring (401) are both blocking planes (404), the two limit shafts (402) are fixedly connected between the two blocking planes (404) and are both vertical, the meniscus (403) is semicircular, the two ends of the meniscus (403) along the chord line extension direction are insertion surfaces (405), the meniscus (403) is provided with an axial hole (406) penetrating through the two insertion surfaces (405) to form a rotating pair with the limit shaft (402).

3. A boiler flue gas duct according to claim 2, characterised in that: The end of the first horizontal section (102) away from the one-way opening door (4) has a downwardly extending first vertical section (101), and the lower end of the first vertical section (101) is adapted to be connected with the smoke outlet of the boiler.

4. A boiler flue gas duct according to claim 3, characterised in that: The lower end of the first vertical section (101) has a connecting disc (106), and the bottom of the connecting disc (106) has a coaxial plug-in ring (105) embedded in the smoke outlet of the boiler.

5. The boiler flue gas duct according to claim 3, characterized in that: The upper end of the second vertical section (202) is fixedly connected with a rain cover (204) through a support rod (203), the rain cover (204) is a right-angled cone, and the lower end of the rain cover (204) has a larger diameter than the upper end of the second vertical section (202).

6. A boiler flue gas duct according to claim 5, characterised in that: The lower end edge of the rain cover (204) is not higher than the upper end edge of the second vertical section (202).

7. A boiler flue gas duct according to any one of claims 1 to 6, c h a r a c t e r i z e d in that The end of the first horizontal section (102) has a first connecting ring (103) expanding outwardly, the first connecting ring (103) is provided with a first through hole (104), the end of the second horizontal section (201) has a second connecting ring (206) expanding outwardly, the second connecting ring (206) is provided with a second through hole (207), the connecting piece (3) includes a bolt (301) and a nut (302), the bolt (301) passes through the first through hole (104) and the second through hole (207) and cooperates with the nut (302).

8. A boiler flue gas duct according to claim 7, characterised in that: The end face of the second connecting ring (206) facing away from the second horizontal section (201) has a coaxial inner press ring (205) adapted to be embedded in the accommodation slot (107) to press the configuration ring (401) tightly.

Images