Flow guiding and equalizing device for exhaust passage

Abstract

The utility model relates to the technical field of residence exhaust passages, in particular to a flow guiding and equalizing device for an exhaust passage, which comprises a flow guiding pipe, a pipe sleeve and an arc-shaped adjusting plate, and the top of the outer wall of the air outlet end of the flow guiding pipe is provided with an air outlet; the outer wall of the air inlet end of the flow guide pipe is in sliding fit with the inner wall of the pipe sleeve in the axial direction of the pipe sleeve. And / or, the arc-shaped adjusting plate is in sliding fit with the inner wall of the flow guide pipe in the axial direction of the pipe sleeve, the arc-shaped adjusting plate is arranged above the air outlet, and the two opposite sides of the arc-shaped adjusting plate are in sliding fit with the two opposite sides of the air outlet correspondingly. According to the flow guiding and equalizing device, the opening degree of the air outlet is adjusted by enabling the flow guiding pipe and the pipe sleeve to slide relatively and / or enabling the arc-shaped adjusting plate and the pipe sleeve to slide relatively, and the effect of discharging flue gas of all floors in a flow equalizing mode is effectively achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of residential exhaust ducts, and particularly relates to a flow guiding and flow equalizing device for an exhaust duct. Background Art

[0002] At present, in existing residential buildings, a flow guiding device is usually used in the exhaust duct to guide the indoor flue gas to the exhaust duct for discharge. However, referring to Figure 1 , the opening degree of the air outlet of the existing flow guiding device for the exhaust duct cannot be adjusted, resulting in the same opening degree of the air outlets of the flow guiding devices on each floor of the exhaust duct 1. Since the flue gas discharge process on the bottom floor is relatively long, the frictional resistance along the way of the flue gas is large, and the exhaust volume is relatively small; the flue gas discharge process on the top floor is relatively short, the frictional resistance along the way of the flue gas is small, and the exhaust volume is relatively large. Therefore, if the opening degrees of the air outlets of the flow guiding devices on each floor are the same, the exhaust volumes between the bottom floor and the top floor will differ greatly, making it impossible to achieve the effect of uniform flow discharge of the flue gas on each floor. Summary of the Utility Model

[0003] One of the main purposes of the utility model is to provide a flow guiding and flow equalizing device for an exhaust duct, aiming to solve the technical problem that the opening degree of the air outlet of the existing flow guiding device for the exhaust duct cannot be adjusted.

[0004] To achieve the above purpose, the utility model provides a flow guiding and flow equalizing device for an exhaust duct, including a flow guiding pipe, a pipe sleeve and an arc-shaped adjusting plate. An air outlet is opened at the top of the outer wall of the air outlet end of the flow guiding pipe; wherein, the outer wall of the air inlet end of the flow guiding pipe is slidably attached to the inner wall of the pipe sleeve along the axial direction of the pipe sleeve; and / or, the arc-shaped adjusting plate is slidably attached to the inner wall of the flow guiding pipe along the axial direction of the pipe sleeve, and the arc-shaped adjusting plate is arranged above the air outlet, and the opposite sides of the arc-shaped adjusting plate are respectively slidably attached to the opposite sides of the air outlet.

[0005] Further, the sliding structure between the flow guiding pipe and the pipe sleeve includes a guide rail and a sliding groove. One of the pipe sleeve and the flow guiding pipe is provided with the guide rail, and the other of the pipe sleeve and the flow guiding pipe is provided with a sliding groove slidably adapted to the guide rail.

[0006] Further, a strip-shaped groove is opened along the axial direction of the pipe sleeve on the arc-shaped adjusting plate, penetrating through the opposite surfaces of the arc-shaped adjusting plate.

[0007] Further, a sealing structure is arranged on the end surface of the pipe sleeve at the end connected to the flow guiding pipe.

[0008] Further, a connecting ring is provided on the end face of the sleeve at the end connected to the diversion pipe. The inner diameter of the connecting ring is larger than the outer diameter of the diversion pipe. The connecting ring is coaxially arranged with the sleeve. An accommodating groove is formed by enclosing the inner ring of the connecting ring, the sleeve and the outer wall of the diversion pipe, and a sealing structure is arranged in the accommodating groove.

[0009] Further, the sealing structure is a sealing rubber ring.

[0010] Further, the sealing structure is a ceramic tile sealant layer.

[0011] Further, the outer diameter of the connecting ring is the same as the outer diameter of the sleeve.

[0012] Further, a vent hole communicating with the air outlet is also opened on the bottom of the outer wall of the air outlet end of the diversion pipe.

[0013] Further, the opposite two outer side walls of the arc-shaped adjusting plate are respectively in sliding fit with the opposite two inner side walls of the air outlet.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] The diversion and flow equalization device of the present utility model adjusts the opening degree of the air outlet of the diversion pipe by making the diversion pipe and the sleeve slide relative to each other and / or by making the arc-shaped adjusting plate and the sleeve slide relative to each other. Among them, when the diversion and flow equalization device is installed on the exhaust duct shared by each floor, the diversion pipe of the diversion and flow equalization device is fixed in the air inlet hole of the exhaust duct, and the air outlet on the diversion pipe is located in the exhaust duct and communicates with the exhaust duct. Since the flue gas discharge path on the bottom floor is relatively long, the flue gas has a relatively large resistance along the way and a relatively small exhaust volume, while the flue gas discharge path on the top floor is relatively short, the flue gas has a relatively small resistance along the way and a relatively large exhaust volume. Therefore, from the bottom floor to the top floor, the air outlets on the diversion pipe are gradually adjusted to be smaller in turn. That is, on the bottom floor, the air outlet of the diversion pipe is the largest, and on the top floor, the air outlet of the diversion pipe is the smallest. In this way, the opening degree of the air outlet of the diversion pipe decreases layer by layer upward, which can effectively reduce the difference in exhaust volume between the bottom floor and the top floor and effectively make the exhaust volume of the bottom floor and the top floor reach a uniform effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of an exhaust duct system in the prior art;

[0017] Figure 2 is a schematic structural diagram of the diversion and flow equalization device for the exhaust duct of the present utility model;

[0018] Figure 3 is a schematic structural diagram of the connection between the sleeve and the diversion pipe according to an embodiment of the present utility model;

[0019] Figure 4This is a schematic structural diagram of the sleeve according to an embodiment of the present utility model;

[0020] Figure 5 This is a schematic structural diagram of the diversion pipe according to an embodiment of the present utility model;

[0021] Figure 6 This is a schematic structural diagram of the arc-shaped adjusting plate according to an embodiment of the present utility model;

[0022] Figure 7 This is a schematic structural diagram of the diversion and flow equalizing device installed on the exhaust duct;

[0023] Figure 8 is Figure 7 The enlarged structural diagram at position A in

[0024] Reference numerals in each drawing:

[0025] 1. Diversion device; 2. Exhaust duct; 20. Air inlet hole; 21. First gap; 22. Second gap; 3. Diversion and flow equalizing device; 30. Diversion pipe; 301. Sleeve; 302. Chute; 303. Guide rail; 304. Ventilation port; 305. Air outlet; 31. Sealing structure; 32. Connecting ring; 320. Accommodating groove; 33. Arc-shaped adjusting plate; 330. Strip-shaped groove; 4. Partition wall; 40. Installation hole; 5. Fire check valve; 6. Butterfly screw. Detailed implementation manners

[0026] It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0027] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "width", "upper", "lower", "front", "rear", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0028] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "connection", "setting" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0029] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the case where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on the top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under" and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is lower than that of the second feature.

[0030] Please refer to Figure 2 - Figure 8 , the present utility model provides a flow guiding and flow equalizing device 3 for an exhaust duct 2, which includes a flow guiding pipe 30, a pipe sleeve 301 and an arc-shaped adjusting plate 33. An air outlet 305 is formed at the top of the outer wall of the air outlet end of the flow guiding pipe 30. Among them, the outer wall of the air inlet end of the flow guiding pipe 30 is in sliding fit with the inner wall of the pipe sleeve 301 along the axial direction of the pipe sleeve 301; and / or, the arc-shaped adjusting plate 33 is in sliding fit with the inner wall of the flow guiding pipe 30 along the axial direction of the pipe sleeve 301, and the arc-shaped adjusting plate 33 is arranged above the air outlet 305, and the opposite sides of the arc-shaped adjusting plate 33 are respectively in sliding fit with the opposite sides of the air outlet 305.

[0031] In summary, it can be understood that the flow guiding and flow equalizing device 3 of the present utility model can adjust the opening degree of the air outlet 305 of the flow guiding pipe 30 by relatively sliding the flow guiding pipe 30 and the pipe sleeve 301; it can also adjust the opening degree of the air outlet 305 of the flow guiding pipe 30 by relatively sliding the arc-shaped adjusting plate 33 and the pipe sleeve 301; or it can relatively slide the flow guiding pipe 30 and the pipe sleeve 301 while relatively sliding the arc-shaped adjusting plate 33 and the pipe sleeve 301 to adjust the opening degree of the air outlet 305 of the flow guiding pipe 30.

[0032] Refer to Figure 7, when the flow guiding and flow equalizing device 3 is applied and installed on the exhaust duct 2 shared by each floor, the flow guiding pipe 30 of the flow guiding and flow equalizing device 3 is fixed in the air inlet hole 20 of the exhaust duct 2, and the pipe sleeve 301 can be fixed in the installation hole 40 reserved on the partition wall 4 through the butterfly screw 6, and the air outlet 305 on the flow guiding pipe 30 is located in the exhaust duct 2 and communicates with the exhaust duct 2. Since the flue gas discharge path on the bottom floor is relatively long, the frictional resistance of the flue gas along the way is relatively large, and the exhaust volume is relatively small. The flue gas discharge path on the top floor is relatively short, the frictional resistance of the flue gas along the way is relatively small, and the exhaust volume is relatively large. Therefore, from the bottom floor to the top floor, the air outlet 305 on the flow guiding pipe 30 is gradually reduced in turn. That is, on the bottom floor, the air outlet 305 of the flow guiding pipe 30 is the largest, and on the top floor, the air outlet 305 of the flow guiding pipe 30 is the smallest. In this way, the opening degree of the air outlet 305 of the flow guiding pipe 30 decreases layer by layer upward, which can effectively reduce the difference in exhaust volume between the bottom floor and the top floor, and effectively make the exhaust volumes of the bottom floor and the top floor reach a uniform effect.

[0033] It should be noted that since the flue gas discharged from the lower layer just hits the bottom of the flow guiding pipe 30 of the upper layer to form a rebound airflow, eddy currents are generated at the air outlet 305 of the flow guiding pipe 30 of the lower layer, and the exhaust resistance of the lower layer will increase, and the exhaust volume will correspondingly decrease. For this reason, the inventor also opens a ventilation port 304 communicating with the air outlet 305 at the bottom of the outer wall of the air outlet end of the flow guiding pipe 30. This ventilation port 304 can effectively prevent the flue gas discharged from the lower layer from hitting the bottom of the flow guiding pipe 30 of the upper layer to form a rebound airflow, thereby preventing eddy currents from being generated at the air outlet 305 of the flow guiding pipe 30 of the lower layer, and further reducing the exhaust resistance of the lower layer. In addition, the ventilation port 304 can also make the air outlet 305 of the lower flow guiding pipe 30 and the air outlet 305 of the upper flow guiding pipe 30 conduct relay ventilation. Since the air outlet 305 of the flow guiding pipe 30 gradually increases from the upper layer to the lower layer, that is, the opening degree of the air outlet 305 of the flow guiding pipe 30 on the topmost floor is the smallest, and the opening degree of the air outlet 305 of the flow guiding pipe 30 on the bottommost floor is the largest. In this way, the flow rate of the flue gas discharged from the air outlet 305 of the upper flow guiding pipe 30 is relatively large, and the flow rate of the flue gas discharged from the air outlet 305 of the lower flow guiding pipe 30 is relatively small. Then, the air outlet 305 of the upper flow guiding pipe 30 plays a role in pulling air for the air outlet 305 of the lower flow guiding pipe 30, making the air outlet 305 of the upper flow guiding pipe 30 have a jet effect, thereby effectively making the exhaust volumes of the bottom floor and the top floor reach a uniform effect.

[0034] In this embodiment, referring to Figure 2 , Figure 4 and Figure 5, the sliding structure between the diversion pipe 30 and the pipe sleeve 301 includes a guide rail 303 and a chute 302. One of the pipe sleeve 301 and the diversion pipe 30 is provided with the guide rail 303, and the other of the pipe sleeve 301 and the diversion pipe 30 is provided with a chute 302 that is slidably adapted to the guide rail 303. The guide rail 303 is fixed on the outer wall of the diversion pipe 30, and the guide rail 303 of the diversion pipe 30 extends along the axial direction of the diversion pipe 30. The chute 302 is opened on the inner wall of the pipe sleeve 301, and the chute 302 also extends along the axial direction of the diversion pipe 30. With the cooperation of the guide rail 303 and the chute 302, the relative sliding between the diversion pipe 30 and the pipe sleeve 301 will not cause the diversion pipe 30 to rotate relative to the pipe sleeve 301, avoiding the influence on the area of the air outlet 305 on the diversion pipe 30 due to the rotation of the diversion pipe 30 relative to the pipe sleeve 301. Exemplarily, in the state where the pipe sleeve 301 is fixed in the intake hole 20 of the exhaust duct 2, if the diversion pipe 30 rotates circumferentially relative to the pipe sleeve 301, it will cause the air outlet 305 of the diversion pipe 30 not to face forward in the exhaust duct 2, thereby reducing the effective exhaust area of the air outlet 305 of the diversion pipe 30 and correspondingly reducing the smoke exhaust efficiency of the air outlet 305 of the diversion pipe 30.

[0035] Of course, in other embodiments, the guide rail 303 can also be fixed on the inner wall of the pipe sleeve 301, and the chute 302 is opened on the outer wall of the diversion pipe 30. In this way, the diversion pipe 30 can also slide relative to the pipe sleeve 301.

[0036] In this embodiment, referring to Figure 6 , a strip-shaped groove 330 is axially opened on the arc-shaped adjusting plate 33 along the axial direction of the pipe sleeve 301 and penetrates the opposite surfaces of the arc-shaped adjusting plate 33. When the arc-shaped adjusting plate 33 moves to the required position along the axial direction of the pipe sleeve 301, the arc-shaped adjusting plate 33 can be fixed on the pipe sleeve 301 by passing a wing screw through the strip-shaped groove 330 and abutting against the inner wall of the pipe sleeve 301. Manually tightening the wing screw can prevent the arc-shaped adjusting plate 33 from shaking.

[0037] In addition, referring to Figure 2 , the opposite outer side walls of the arc-shaped adjusting plate 33 are respectively in sliding fit with the opposite inner side walls of the air outlet 305 of the diversion pipe 30. In this way, the arc-shaped adjusting plate 33 can slide along the side wall of the air outlet 305 of the diversion pipe 30, avoiding too large a gap between the opposite sides of the arc-shaped adjusting plate 33 and the opposite sides of the air outlet 305 of the diversion pipe 30.

[0038] Since there are gaps between the vertically shared exhaust duct 2 and the partition wall 4 on each floor, and there are also gaps between the diversion pipe 30 and the air inlet hole 20 of the exhaust duct 2. However, the inventor found that these gaps are difficult to seal from the outside of the partition wall 4, and the flue gas in the exhaust duct 2 can easily leak out through these gaps, resulting in the problems of smoke and odor cross - leakage. In response to this, a sealing structure 31 is provided on the end face of the pipe sleeve 301 at the end connected to the diversion pipe 30. Among them, referring to Figure 7 and Figure 8 , the gap between the diversion pipe 30 and the air inlet hole 20 of the exhaust duct 2 is set as the first gap 21, and the gap between the partition wall 4 and the exhaust duct 2 is set as the second gap 22. When the air outlet 305 of the diversion pipe 30 passes through the reserved installation hole 40 on the partition wall 4 and the air inlet hole 20 on the exhaust duct 2 in sequence and enters the exhaust duct 2 to communicate with the exhaust duct 2, the end face of the pipe sleeve 301 at the end connected to the diversion pipe 30 contacts the exhaust duct 2. In this way, the sealing structure 31 on the pipe sleeve 301 just seals the position where the first gap 21 and the second gap 22 communicate, preventing the flue gas in the exhaust duct 2 from entering the second gap 22 through the first gap 21, thereby avoiding the problems of smoke and odor cross - leakage. It can be seen that after installing the diversion pipe 30, the sealing structure 31 on the pipe sleeve 301 seals the position where the first gap 21 and the second gap 22 communicate, solving the problem of needing to seal the gaps between the exhaust duct 2 and the partition wall 4 and between the diversion pipe 30 and the air inlet hole 20 of the exhaust duct 2 from the outside of the partition wall 4.

[0039] In this embodiment, the end face of the pipe sleeve 301 at the end connected to the diversion pipe 30 is set as a sealing end face. A connecting ring 32 is provided on the sealing end face. The inner diameter of the connecting ring 32 is larger than the outer diameter of the diversion pipe 30. The connecting ring 32 is coaxially arranged with the pipe sleeve 301. An accommodating groove 320 is formed by enclosing the inner ring of the connecting ring 32, the pipe sleeve 301 and the outer wall of the diversion pipe 30. The sealing structure 31 is arranged in the accommodating groove 320. The sealing structure 31 can be a sealing rubber ring or a ceramic tile sealing glue layer coated on the end face of the pipe sleeve 301 at the end connected to the diversion pipe 30. That is to say, it can be understood that the accommodating groove 320 has the function of accommodating and limiting the sealing structure 31, preventing the sealing structure 31 from falling off, which is beneficial to improving the sealing performance of the sealing structure 31 for sealing the gap between the pipe sleeve 301 and the exhaust duct 2, thereby improving the sealing performance of the position where the first gap 21 and the second gap 22 communicate.

[0040] In this embodiment, the outer diameter of the connecting ring 32 is the same as the outer diameter of the pipe sleeve 301, which is beneficial to the integral molding of the connecting ring 32. Of course, in other embodiments, the outer diameter of the connecting ring 32 can also be smaller than the outer diameter of the pipe sleeve 301, which is not limited here, as long as it is ensured that the outer diameter of the connecting ring 32 is larger than the outer diameter of the diversion pipe 30.

[0041] Of course, a fire prevention check valve 5 is also fixedly installed on the partition wall 4, and the fire prevention check valve 5 is communicated with the air inlet end of the flow guiding and flow equalizing device 3. That is to say, the fire prevention check valve 5 is communicated with the air inlet end of the pipe sleeve 301.

[0042] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied to other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A flow guiding and flow equalizing device for an exhaust duct, characterized in that, It includes a diversion pipe, a pipe sleeve and an arc-shaped adjusting plate. An air outlet is provided at the top of the outer wall of the air outlet end of the diversion pipe. Among them, the outer wall of the air inlet end of the diversion pipe is slidably attached to the inner wall of the pipe sleeve along the axial direction of the pipe sleeve; and / or, the arc-shaped adjusting plate is slidably attached to the inner wall of the diversion pipe along the axial direction of the pipe sleeve, and the arc-shaped adjusting plate is arranged above the air outlet, and the opposite sides of the arc-shaped adjusting plate are respectively slidably attached to the opposite sides of the air outlet.

2. The flow guiding and flow equalizing device for the exhaust passage according to claim 1, wherein The sliding structure between the diversion pipe and the pipe sleeve includes a guide rail and a chute. One of the pipe sleeve and the diversion pipe is provided with the guide rail, and the other is provided with a chute slidably adapted to the guide rail.

3. The flow guiding and flow equalizing device for exhaust ducts according to claim 1, characterized in that, A strip-shaped groove penetrating the opposite surfaces of the arc-shaped adjusting plate is axially provided on the arc-shaped adjusting plate along the pipe sleeve.

4. The flow guiding and flow equalizing device for exhaust ducts according to claim 1, characterized in that, A sealing structure is provided on the end surface of the pipe sleeve at the end connected to the diversion pipe.

5. The flow guiding and flow equalizing device for the exhaust duct according to claim 1, characterized in that, A connecting ring is provided on the end surface of the pipe sleeve at the end connected to the diversion pipe. The inner diameter of the connecting ring is larger than the outer diameter of the diversion pipe. The connecting ring is coaxially arranged with the pipe sleeve. An accommodation groove is formed by enclosing the inner ring of the connecting ring, the pipe sleeve and the outer wall of the diversion pipe. A sealing structure is provided in the accommodation groove.

6. The flow guiding and flow equalizing device for the exhaust duct according to claim 4 or 5, characterized in that, The sealing structure is a sealing rubber ring.

7. The flow guiding and flow equalizing device for the exhaust duct according to claim 4 or 5, characterized in that, The sealing structure is a ceramic tile sealant layer.

8. The flow guiding and flow equalizing device for the exhaust duct according to claim 5, wherein The outer diameter of the connecting ring is the same as the outer diameter of the pipe sleeve.

9. The flow guiding and flow equalizing device for exhaust ducts according to claim 1, wherein A ventilation port communicating with the air outlet is further provided at the bottom of the outer wall of the air outlet end of the diversion pipe.

10. The flow guiding and flow equalizing device for exhaust ducts according to claim 1, characterized in that, The opposite outer side walls of the arc-shaped adjusting plate are respectively slidably attached to the opposite inner side walls of the air outlet.

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