External assembly type mouth-shaped flow-equalizing exhaust flue

Abstract

The utility model relates to the technical field of environmental protection, and discloses an external assembly type mouth-shaped flow-equalizing exhaust flue which comprises vertical flue gas ducts which are sequentially distributed in the vertical direction, the vertical flue gas ducts are pre-embedded with covered edge fixing structures used for being connected with a wall body, and the vertical flue gas ducts are provided with gas inlet mechanisms used for leading flue gas into the vertical flue gas ducts. Through the arrangement of the pre-embedded edge-covering fixing structure, the safety hoisting hole, the flue connecting piece and the mounting groove, the upper vertical flue and the lower vertical flue can be tightly assembled together, through the arrangement of the flow equalizing device, the problem that the vertical flue is blocked due to unsmooth exhaust can be solved, and the vertical flue is fixed to the outer side of the wall body, so that the vertical flue is not blocked. According to the utility model, the occupied indoor precious space of a kitchen and a toilet is effectively avoided, the layout of the kitchen and the toilet is more flexible, the utilization rate of the space is improved, a more spacious and comfortable cooking environment is provided for residents, and the tedious steps of indoor hole reservation, formwork erection, formwork removal (painting after installation of a flue product) and the like are omitted through external installation.

Description

TECHNICAL FIELD

[0001] The utility model relates to environmental protection technical field especially, it relates to external assembly formula mouth shape even flow exhaust flue. BACKGROUND

[0002] At present, the atlas and standard of flue gas duct in China are all installed in the indoor of residential kitchen room and bathroom from the 1980s to now. The flue gas duct manufacturing process is simple in the 1980s, and the finished product flue gas duct is made by manual plastering without mechanized production, so the quality cannot be guaranteed at that time. At that time, considering the weak product quality of flue gas duct, in order to safety, the flue gas duct is designed to be installed indoors. Indoor installation has many disadvantages.

[0003] First, it occupies effective space; second, the construction is relatively troublesome. The flue gas duct is installed in the indoor kitchen room, and the installation hole of the flue gas duct is reserved at the installation position of the flue gas duct. The formwork and form removal of the reserved hole are relatively troublesome; third, when the flue gas duct is installed after the removal of the formwork of the reserved hole, because the hole of the reserved flue gas duct is relatively large, the staff often falls from the hole by accident, and serious injuries occur. In addition, the falling objects from above the hole often injure the personnel installing the flue gas duct during the installation of the flue gas duct; fourth, after the flue gas duct is installed, the reserved hole needs to be plugged and waterproofed; fifth, the indoor installation of the flue gas duct needs to be painted and additionally tiled with ceramic tiles; sixth, the heat of the flue gas duct pipe body is too high when everyone is cooking, especially in summer. The temperature of the kitchen is high, and the heat of the flue gas duct pipe body causes great discomfort to the cooking personnel. The indoor installation of the flue gas duct brings many processes and troubles to the developer construction unit, and adds many safety hazards. It also loses the effective use of space in the small kitchen of the housing owner, causes physical injury, wastes a large amount of money for the purchase of housing flue gas duct, and affects the design appearance. Therefore, the external assembly formula mouth shape even flow exhaust flue is proposed to solve the above problems. CONTENT OF THE UTILITY MODEL

[0004] In view of the deficiencies of the prior art, the utility model provides an external assembly formula mouth shape even flow exhaust flue.

[0005] The utility model adopts the following technical scheme: the external assembly formula mouth shape even flow exhaust flue comprises vertical flue gas ducts which are distributed in sequence along the vertical direction, the vertical flue gas duct is pre-buried with a covered edge fixing structure for connecting with a wall body, and the vertical flue gas duct is provided with an air inlet mechanism for introducing flue gas into the vertical flue gas duct.

[0006] The edge fixing structure comprises a connecting rod sleeved on the wall body, one end of the connecting rod is fixedly connected with a U-shaped plate, the end of the U-shaped plate away from the connecting rod is provided with a threaded rod, the outer ring of the threaded rod is movably sleeved with an extrusion plate, the extrusion plate penetrates a connecting hole sleeved with the threaded rod, and the outer wall of the threaded rod is threadedly connected with a nut.

[0007] The air inlet mechanism comprises a flue gas through connecting pipe sleeved with the wall body and a flue gas duct interface connecting pipe pre-buried in the vertical flue gas duct, the flue gas through connecting pipe is sleeved with the flue gas duct interface connecting pipe, the end of the flue gas through connecting pipe away from the flue gas duct interface connecting pipe is provided with a return valve, and the end of the flue gas duct interface connecting pipe away from the flue gas through connecting pipe is provided with a flow uniformizing device extending into the vertical flue gas duct.

[0008] As a further improvement of the above-mentioned scheme, the vertical flue gas duct comprises a flue gas duct body in annular structure, the inner ring of one end of the flue gas duct body is inlaid with a flue gas duct connecting piece, and the end inner wall of the other end of the flue gas duct body is provided with a mounting groove sleeved with the adjacent flue gas duct connecting piece.

[0009] As a further improvement of the above-mentioned scheme, the flow uniformizing device comprises a connecting part sleeved with the flue gas duct interface connecting pipe, and the connecting part extends into one end of the vertical flue gas duct and is connected with a flow uniformizing part.

[0010] As a further improvement of the above-mentioned scheme, the width of the flow uniformizing part gradually decreases from the connecting part to one side of the flow uniformizing part.

[0011] As a further improvement of the above-mentioned scheme, the topmost vertical flue gas duct is symmetrically provided with a support frame on the top surface, and a multifunctional non-blocking wind and rain snow prevention anti-inversion cap is installed on the top end of the support frame.

[0012] As a further improvement of the above-mentioned scheme, the outer wall of the nut is annularly provided with an anti-skid strip.

[0013] As a further improvement of the above-mentioned scheme, the material of the flue gas duct body is cement mortar material, and the material of the flue gas duct connecting piece is stainless steel material.

[0014] As a further improvement of the above-mentioned scheme, the outer wall of the flue gas duct connecting piece is symmetrically provided with a safety hoisting hole on both sides.

[0015] As a further improvement of the above-mentioned scheme, a check piece for avoiding backflow of flue gas is installed on the flow uniformizing part.

[0016] As a further improvement of the above-mentioned scheme, the bottom of the bottommost vertical flue gas duct is provided with a bearing plate, the material of the bearing plate is cement mortar material, and the bearing plate is connected with a drain pipe and an exhaust pipe, the drain pipe is provided with a drain valve, and the exhaust pipe is provided with a vent valve.

[0017] Compared with the prior art, the utility model has the beneficial effects that

[0018] 1, the utility model discloses utility model through the setting of pre -buried edge fixing structure, safe hoist hole, flue connecting piece and installation slot, can be assembled together tightly to the up and down vertical flue, the setting of even -flow device, can solve the problem of the exhaust of vertical flue and be blocked, and the vertical flue is fixed with the wall body outside, effectively avoid the occupation indoor precious kitchen and bathroom space, make the kitchen and bathroom layout more flexible, improve the space utilization, provide more spacious and comfortable cooking environment for the dweller, the external installation saves the indoor reservation hole, the formwork, the complicated step such as dismantling (vertical flue product is installed after painting) etc.

[0019] 2, the utility model external installation vertical flue saves the indoor reservation hole, the formwork, the complicated step such as dismantling, reduces the construction difficulty and complexity, improves the construction efficiency, reduces the construction cost, avoids the falling risk caused by reservation big hole simultaneously, also reduces the possibility of injury to construction personnel caused by high-altitude falling objects, significantly improves the safety in the construction process.

[0020] 3, the utility model through the setting of air inlet mechanism, can introduce the flue gas of kitchen into the inside of vertical flue, finally is discharged from the most upper vertical flue port, since the even -flow device is the flow guide structure that is uniformly distributed from below to above, and the appearance is the mouth face structure that gradually becomes smaller from big, plus the port of even -flow device is in the oblique upper side, according to Bernoulli's principle, when the smoke flue gas passes through flue interface connecting piece and enters even -flow device from smoke flue through -connection pipe, since the mouth face gradually reduces, the flow velocity of flue gas is forced to accelerate, thereby forming a low pressure zone at even -flow device, this flow rate increase not only accelerates the discharge of flue gas, but also according to Bernoulli's principle, a relatively high pressure zone is formed around even -flow device, which helps to further push the flue gas to discharge outward, thereby improving the exhaust efficiency, and the even -flow device is the flow guide structure that is uniformly distributed from below to above, which can effectively prevent flue gas from backflowing. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the structure schematic drawing of the utility model;

[0022] Figure 2 It is the local structure schematic drawing of the utility model;

[0023] Figure 3 It is the sectional view of the utility model Figure 2 ;

[0024] Figure 4 It is the enlarged view of A of the utility model Figure 1 ;

[0025] Figure 5For the utility model Figure 3 The enlarged view of B of the utility model is shown in the figure.

[0026] Figure 6 For the utility model vertical flue gas duct is shown in the figure.

[0027] Figure 7 For the utility model edge fixing structure structure diagram is shown in the figure.

[0028] Figure 8 For the utility model vertical flue gas duct is shown in the figure.

[0029] Figure 9 For the utility model edge fixing structure structure diagram of embodiment 9 is shown in the figure.

[0030] Figure 10 For the utility model flow equalizing device structure diagram of embodiment 4 is shown in the figure.

[0031] Figure 11 For the utility model flow equalizing device structure diagram of embodiment 5 is shown in the figure.

[0032] Figure 12 For the utility model flow equalizing device structure diagram of embodiment 6 is shown in the figure.

[0033] Figure 13 For the utility model flow equalizing device structure diagram of embodiment 7 is shown in the figure.

[0034] Main symbol explanation:

[0035] 11, air pipe one;12, flow equalizing pipe one;13, check valve one;21, air pipe two;22, flow equalizing pipe two;31, air pipe three;32, flow equalizing groove;33, baffle;34, valve plate;35, limiting plate;41, air pipe four;42, flow equalizing pipe four;43, check valve two;2, vertical flue gas duct;201, flue main body;202, flue connecting piece;203, mounting groove;3, air inlet mechanism;301, flue gas through connecting pipe;302, flue interface connecting piece;303, check valve;304, flow equalizing device;4, edge fixing structure;401, connecting rod;402, U-shaped plate;403, threaded rod;404, extrusion plate;405, nut;5, support frame;6, multifunctional non-blocking windproof and rainproof snowproof anti-inverted air cap;7, safety hoisting hole;8, bearing plate. Specific implementation

[0036] Next, the utility model is further described in combination with the drawings and specific implementation, and it should be explained that, under the premise of not conflicting, the following described each embodiment or each technical feature between can be combined to form new embodiment.

[0037] Embodiment 1:

[0038] Please combine Figures 1-9 The external assembly type mouth-shaped flow-equalizing exhaust flue of the embodiment comprises vertical flues 2 arranged in sequence in the vertical direction, the vertical flues 2 are pre-buried with edge-covering fixing structures 4 for connecting with the wall body, and the vertical flues 2 are provided with air inlet mechanisms 3 for introducing flue gas into the vertical flues 2;

[0039] The edge-covering fixing structure 4 comprises a connecting rod 401 sleeved on the wall body, one end of the connecting rod 401 is fixedly connected with a U-shaped plate 402, the end of the U-shaped plate 402 away from the connecting rod 401 is provided with a threaded rod 403, the outer circle of the threaded rod 403 is movably sleeved with an extrusion plate 404, the extrusion plate 404 penetrates a connecting hole sleeved with the threaded rod 403, the outer wall of the threaded rod 403 is threadedly connected with a nut 405, and the outer wall of the nut 405 annularly arranges anti-skid strips;

[0040] The air inlet mechanism 3 comprises a flue gas through connection pipe 301 sleeved with the wall body and a flue gas channel interface connection pipe 302 pre-buried on the vertical flue 2, the flue gas through connection pipe 301 is sleeved with the flue gas channel interface connection pipe 302, one end of the flue gas through connection pipe 301 away from the flue gas channel interface connection pipe 302 is provided with a check valve 303, and one end of the flue gas channel interface connection pipe 302 away from the flue gas through connection pipe 301 is provided with a flow-equalizing device 304 extending into the vertical flue 2.

[0041] The implementation principle of the external assembly type mouth-shaped flow-equalizing exhaust flue in the embodiment is as follows.

[0042] Embodiment 2

[0043] The vertical flue 2 comprises a flue main body 201 in a ring structure, the inner circle of one end of the flue main body 201 is inlaid with a flue connection piece 202, and the end inner wall of the other end of the flue main body 201 is provided with an installation groove 203 sleeved with the adjacent flue connection piece 202;

[0044] The material of the flue main body 201 is cement mortar material, and the material of the flue connection piece 202 is stainless steel material;

[0045] The outer wall of the flue connection piece 202 is symmetrically provided with safety hoisting holes 7 on both sides;

[0046] The bottom of the bottommost vertical flue 2 is provided with a bearing plate 8, the material of the bearing plate 8 is cement mortar material, the bearing plate 8 is connected with a drainage pipe and an exhaust pipe, the drainage pipe is provided with a water drain valve, and the exhaust pipe is provided with a gas release valve;

[0047] The top surface of the topmost vertical flue 2 is symmetrically provided with a support frame 5, and the top end of the support frame 5 is provided with a multifunctional non-blocking wind and rain and snow prevention anti-inversion wind cap 6.

[0048] Embodiment 3:

[0049] The flow equalizing device 304 comprises a connecting part sleeved with the flue interface connecting pipe 302, and the connecting part extends into the vertical flue 2 and is connected with a flow equalizing part at one end;

[0050] The width of the flow equalizing part gradually decreases from the connecting part to one side of the flow equalizing part;

[0051] The flow equalizing part is provided with a check part for preventing backflow of flue gas;

[0052] The connection mode of the flue interface connecting pipe 302 on the vertical flue 2 with the flue through connecting pipe 301 and the flue through connecting pipe 301 with the check valve 303 includes but is not limited to any form such as bolt, plug-in, clamping, etc. The wall is provided with a wall-penetrating hole for installing the flue through connecting pipe 301, and the wall-penetrating hole has a certain inclination angle at the initial stage of being opened, and the inclination angle is inclined downward along the indoor to outdoor direction, and at the same time, the flue through connecting pipe 301 placed in the wall-penetrating hole also has a certain inclination angle, so as to prevent rainwater from flowing back into the house.

[0053] The flow equalizing device 304 is tightly connected on the flue interface connecting pipe 302, then the vertical flue 2 is placed close to the wall, then the hole (wall-penetrating hole) is drilled at the corresponding position of the wall according to the size of the flue through connecting pipe 301, then one end of the flue through connecting pipe 301 is tightly connected with the flue interface connecting pipe 302 through bolt or plug, then the flue through connecting pipe 301 is placed in the wall-penetrating hole, and at the same time, the flue through connecting pipe 301 extends out of the wall close to the house, so as to facilitate the later installation of the check valve 303, then the check valve 303 is connected with the exhaust pipe of the house, then the generated flue gas passes through the flue through connecting pipe 301, the flue interface connecting pipe 302, the flow equalizing device 304, and is sprayed out of the flow equalizing device 304, because the flow equalizing device 304 is a flow guiding structure for uniform distribution from bottom to top, and has a gradually smaller port surface structure, and the port of the flow equalizing device 304 is inclined upward (for example Figure 5As shown, according to Bernoulli's principle, when the flue gas passes through the flue gas interface connecting piece 302 from the flue gas through connecting pipe 301 to the flow equalizing device 304, due to the gradual reduction of the mouth surface, the flow rate of the flue gas is forced to increase, thereby forming a low pressure area at the flow equalizing device 304. This increase in flow rate not only speeds up the discharge of flue gas, but also forms a relatively high pressure area around the flow equalizing device 304 according to Bernoulli's principle, which helps to further push the flue gas outwards, thereby improving the exhaust efficiency. The flow equalizing device 304 is a flow guiding structure that uniformly guides from bottom to top. This design can effectively prevent backflow of flue gas. It should be noted that after the flue gas through connecting pipe 301 is placed inside the through-wall hole, the connection gap between the through-wall hole, the flue gas through connecting pipe 301 and the wall body 1 is sealed and backfilled to prevent water and air leakage at this point. At the connection between the upper and lower vertical flue gas ducts 2, cement mortar or fire-resistant sealant can be applied to quickly connect the upper and lower vertical flue gas ducts 2 while achieving overall airtightness.

[0054] Example 4:

[0055] As shown in Figure 10 : the flow equalizing device 304 includes a gas pipe one 11 that is connected to the flue gas interface connecting pipe 302, the gas pipe one 11 extends into one end of the vertical flue gas duct 2 and is connected to an inclined upwardly arranged flow equalizing pipe one 12, the flow equalizing pipe one 12 is connected to a check valve one 13.

[0056] Example 5:

[0057] As shown in Figure 11 : the flow equalizing device 304 includes a gas pipe two 21 that is connected to the flue gas interface connecting pipe 302, the gas pipe two 21 extends into one end of the vertical flue gas duct 2 and is connected to an inclined upwardly arranged flow equalizing pipe two 22.

[0058] Example 6:

[0059] As shown in Figure 12 : the flow equalizing device 304 includes a gas pipe three 31 that is connected to the flue gas interface connecting pipe 302, the gas pipe three 31 extends into one end of the vertical flue gas duct 2 and is connected to an inclined upwardly arranged U-shaped flow equalizing groove 32, a check component is arranged between the gas pipe three 31 and the flow equalizing groove 32.

[0060] The backflow prevention component includes a baffle 33 fixedly attached to the opening of the air pipe 31 near the flow equalization channel 32. The baffle 33 has a through-hole 1. A valve plate 34 is installed on the side of the baffle 34 away from the air pipe 31 and is slidably connected to the inner wall of the flow equalization channel 32. A limiting plate 35 is provided on the side of the valve plate 34 away from the baffle 33 and is fixedly connected to the flow equalization channel 32. A spring is fixedly connected between the limiting plate 35 and the valve plate 34. The valve plate 34 has a through-hole 2. When there is smoke inside the wall, the smoke enters the air pipe 31 along the smoke through-connecting pipe 301. The smoke is discharged from the through-hole 1 on the baffle 34, pushing the valve plate 34 to move, so that the smoke in the room enters the vertical smoke duct 2. When there is no smoke in the room, under the action of the spring, the valve plate 34 abuts against the baffle 33, and the valve plate 34 blocks the through-hole 1, preventing the inside of the vertical smoke duct 2 from flowing back into the room from the air pipe 31.

[0061] Example 7:

[0062] like Figure 13 As shown: The flow equalization device 304 includes a gas pipe 41 that is sleeved with the flue gas duct interface connecting pipe 302. One end of the gas pipe 41 extends into the vertical flue gas duct 2 and is connected to a flow equalization pipe 42. The flow equalization pipe 42 is connected to a check valve 43.

[0063] Example 8:

[0064] In addition to the above, the edge-binding fixing structure 4 can also be a tripod, expansion screw, bracket connector, bolt, screw rod, etc., and there are no restrictions here.

[0065] Example 9:

[0066] like Figure 9 As shown, the edge-binding mechanism 4 can have a second operating method. The edge-binding mechanism 4 includes a U-shaped plate 402 and a threaded rod 403 that passes through the U-shaped plate 402.

[0067] Workers can open installation slots on both sides of the U-shaped plate 402 on the wall, then install the threaded rod 403 inside the installation slot, and then rotate the nut 405 so that the nut 405 moves along the threaded rod 403 until the nut 405 presses the extrusion plate 404, thereby making the extrusion plate 404 tightly abut against the flue body 201 and clamping and fixing the vertical flue duct 2.

[0068] In the working process, the bearing groove is reserved on the concrete beam of the wall during the house construction, so as to facilitate the fixation of the connecting rod 401, and when the vertical flue 2 is installed, the connecting rod 401 is first fixed in the bearing groove, then the hook of the crane is hooked on the safety lifting hole 7 on the flue connecting piece 202, then the vertical flue 2 is lifted, the flue connecting piece 202 is aligned with the installation groove 203, so that the upper and lower flues can be assembled together, and in the assembling process, the installation of every two vertical flues 2 is set as a stage, the staff inserts the extrusion plate 404 along the threaded rod 403, so that the extrusion plate 404 is attached to the outer wall of the flue body 201, then the nut 405 is sleeved on the end of the threaded rod 403, the nut 405 is rotated to move along the threaded rod 403, until the nut 405 extrudes the extrusion plate 404, so that the extrusion plate 404 is tightly in contact with the flue body 201, and the vertical flue 2 is clamped and fixed, then after the vertical flue 2 is fixed, the flue connecting piece 202 and the installation groove 203 can be used to sleeve a vertical flue 2 above the vertical flue 2, then another vertical flue 2 is sleeved above the vertical flue 2, then the vertical flue 2 is fixed and clamped by the edge covering, so that every other vertical flue 2 is clamped by the edge covering, and then the support frame 5 and the multifunctional non-blocking wind and rain snow prevention anti-inversion cap 6 are installed on the top of the uppermost vertical flue 2, so as to avoid a large amount of rainwater from falling into the vertical flue 2.

[0069] The utility model discloses a preburied edge covering fixation structure, safety lifting hole, flue connecting piece and installation groove can be assembled together tightly, the setting of uniform flow device can solve the problem of the vertical flue's exhaust obstruction, and the vertical flue is fixed with the wall outside, effectively avoid occupying the precious kitchen and bathroom space in the room, make the kitchen and bathroom layout more flexible, improve the space utilization, provide the more spacious and comfortable cooking environment for the dweller, and the external installation saves the complicated steps such as indoor reserved hole, formwork, form removal (after the flue product is installed, paint) etc.

[0070] The above-mentioned embodiments are only preferred embodiments of the utility model, and cannot be used to limit the range of protection of the utility model, and any non-essential changes and replacements made by the person skilled in the art on the basis of the utility model all belong to the range of protection required by the utility model.

Claims

1. An externally mounted, prefabricated, uniformly flowing exhaust flue, comprising vertical flue ducts (2) arranged sequentially along the vertical direction, characterized in that: The vertical flue (2) is pre-embedded with a edging fixing structure (4) for connecting with the wall, and the vertical flue (2) is provided with an air intake mechanism (3) for introducing flue gas into the vertical flue (2). The edge-binding fixing structure (4) includes a connecting rod (401) sleeved on the wall. One end of the connecting rod (401) is fixedly connected to a U-shaped plate (402). A threaded rod (403) is installed at the end of the U-shaped plate (402) away from the connecting rod (401). An extrusion plate (404) is movably sleeved on the outer ring of the threaded rod (403). The extrusion plate (404) has a connecting hole through which it is sleeved with the threaded rod (403). A nut (405) is threadedly connected to the outer wall of the threaded rod (403). The air intake mechanism (3) includes a flue gas through-connecting pipe (301) sleeved with the wall and a flue gas duct interface connecting pipe (302) pre-embedded in the vertical flue gas duct (2). The flue gas through-connecting pipe (301) is sleeved with the flue gas duct interface connecting pipe (302). A check valve (303) is installed at the end of the flue gas through-connecting pipe (301) away from the flue gas duct interface connecting pipe (302). A flow equalization device (304) extending into the interior of the vertical flue gas duct (2) is provided at the end of the flue gas duct interface connecting pipe (302) away from the flue gas through-connecting pipe (301).

2. The externally mounted, uniformly shaped exhaust flue as described in claim 1, characterized in that, The vertical flue (2) includes a flue body (201) with an annular structure. A flue connector (202) is inlaid on the inner ring of one end of the flue body (201), and an installation groove (203) is opened on the inner wall of the other end of the flue body (201) to fit with the adjacent flue connector (202).

3. The externally mounted, uniformly shaped exhaust flue as described in claim 1, characterized in that, The flow equalization device (304) includes a connecting part that is sleeved with the flue gas duct interface connecting pipe (302), and the end of the connecting part that extends into the vertical flue gas duct (2) is connected to the flow equalization part.

4. The externally mounted, uniformly shaped exhaust flue as described in claim 3, characterized in that, The width of the flow equalization section gradually decreases from the connecting part to one side of the flow equalization section.

5. The externally mounted, uniformly shaped exhaust flue as described in claim 1, characterized in that, The top of the vertical flue (2) is symmetrically equipped with a support frame (5), and a multi-functional windproof, rainproof, snowproof and backflow-proof cap (6) is installed at the top of the support frame (5).

6. The externally mounted, uniformly shaped exhaust flue as described in claim 1, characterized in that, The outer wall of the nut (405) is provided with anti-slip strips arranged in a ring.

7. The externally mounted, uniformly shaped exhaust flue as described in claim 2, characterized in that, The flue body (201) is made of cement mortar, and the flue connector (202) is made of stainless steel.

8. The externally mounted, uniformly shaped exhaust flue as described in claim 2, characterized in that, The outer wall of the flue connector (202) is symmetrically provided with safety hoisting holes (7) on both sides.

9. The externally mounted, uniformly shaped exhaust flue as described in claim 3, characterized in that, The flow equalization section is equipped with a backflow preventer to prevent flue gas from flowing back.

10. The externally mounted, uniformly shaped exhaust flue as described in claim 1, characterized in that, The bottom of the vertical flue (2) is equipped with a support plate (8). The support plate (8) is made of cement mortar. The support plate (8) is connected to a drain pipe and an exhaust pipe. The drain pipe is equipped with a drain valve, and the exhaust pipe is equipped with an exhaust valve.

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