Arc exhaust duct

Abstract

The present application relates to an arc exhaust duct, and relates to the technical field of exhaust ducts, which includes an arc tube, which is a curved tube structure, including two arc plates and two straight plates parallel to each other; the straight plates and the arc plates surround to form the arc tube; a connecting tube is provided with two sections, which are respectively connected to the two ends of the arc tube, and are used to connect the arc tube with other pipelines; a guide bend plate is located in the arc tube, and the end face of the guide bend plate is fixedly connected to the straight plate; and the arc radius of the end face of the guide bend plate is the same, and the convex surface of the guide bend plate is located on the side close to the arc plate; a plurality of guide bend plates are provided, and the present application has the effect of reducing the possibility of smoke returning from the exhaust duct.

Description

Technical Field

[0001] The present application relates to the technical field of exhaust ducts, and in particular to an arc exhaust duct. Background Art

[0002] Exhaust ducts are pipes used for gas transportation, and are commonly used for exhausting oil smoke, removing dust, supplying air, and transporting smoke generated in industrial production processes; when the duct needs to be turned, an arc duct is required for connection and turning.

[0003] The existing arc exhaust duct includes an arc pipe and a connecting pipe; the connecting pipe is a straight pipe, which is connected to both ends of the arc pipe respectively, and is used to connect the arc pipe with other pipes, thereby completing the turning of the exhaust duct.

[0004] With regard to the above-mentioned related technologies, when the amount of smoke is large, there is a defect that the smoke in the exhaust duct forms a vortex and returns smoke. Summary of the invention

[0005] In order to solve the defect of smoke returning from the exhaust duct, the present application provides a circular arc exhaust duct.

[0006] The present application provides an arc exhaust duct, which adopts the following technical scheme: it includes an arc tube, which is a curved tube structure, including two arc plates and two straight plates parallel to each other; the straight plates and the arc plates are surrounded to form an arc tube; a connecting pipe is provided with two sections, which are respectively connected to the two ends of the arc tube, so as to connect the arc tube with other pipelines; a guide bend plate is located in the arc tube, and the end face of the guide bend plate is fixedly connected to the straight plate; and the arc radius of the end face of the guide bend plate is the same, and the convex surface of the guide bend plate is located on the side close to the arc plate; a plurality of guide bend plates are provided.

[0007] By adopting the above technical solution, when the arc exhaust duct is used, the connecting pipe is first connected to the two ends of the arc pipe, and then the connecting pipe is used to connect with other pipes; when exhausting, as the smoke flows into the arc pipe, the smoke is diverted under the action of the guide bend plate, and the smoke diversion reduces the possibility of smoke forming vortex in the arc pipe, thereby reducing the possibility of smoke returning to the exhaust duct.

[0008] Preferably, a smoke storage tube is provided on the outer sleeve of the arc tube, and the smoke storage tube extends outside the connecting tube; one end of the smoke storage tube close to the air inlet end of the arc tube is fixedly connected to the outer wall of the connecting tube; an anti-overflow hole is provided on the circumferential side wall of the connecting tube close to the air inlet end of the arc tube.

[0009] By adopting the above technical solution, the smoke is discharged from the connecting pipe. At this time, the smoke flow rate is relatively large and the air pressure around the smoke is reduced. At this time, under the action of the smoke storage pipe and the anti-overflow hole, the gas in the connecting pipe can be extracted; if there is smoke return, it will be extracted under the action of the smoke storage pipe; at the same time, no external power is required, and the possibility of smoke return in the exhaust duct is reduced by relying on the smoke's own flow.

[0010] Preferably, a check plate is hinged on the circumferential outer wall of the connecting pipe, and the check plate is used to seal the anti-overflow hole.

[0011] Preferably, a stop cylinder is connected to the circumferential inner wall of the connecting tube near the air inlet end of the arc tube, and the outer wall of the stop cylinder corresponds to the anti-overflow hole; the end of the stop cylinder facing away from the arc tube is fixedly connected to the connecting tube; and the stop cylinder gradually narrows from the end facing away from the arc tube to the end close to the arc tube.

[0012] By adopting the above technical scheme, when exhausting smoke, the setting of the stop cylinder reduces the smoke flowing from the smoke inlet of the connecting pipe to the anti-overflow hole, thereby improving the anti-smoke return effect of the smoke storage tube; the tapered setting of the stop cylinder can make the returned smoke flow to the anti-overflow hole, and at the same time, the smoke passes through the stop cylinder with the tapered setting, which increases the gas flow rate; thereby reducing the turbulence and eddy current formed by the returned smoke, thereby achieving the effect of reducing the possibility of smoke return.

[0013] Preferably, a plurality of guide bends are provided, and the plurality of guide bends are distributed along the radius of the arc; the arc length of the guide bend close to the center of the arc is smaller than the arc length of the guide bend far from the center of the arc.

[0014] Preferably, it also includes an exhaust pipe and a cut-off pipe; the exhaust pipe is coaxially connected and communicated with the connecting pipe near the air outlet end of the arc pipe; the cut-off pipe is sleeved outside the exhaust pipe, one end is connected and communicated with the smoke storage pipe, and the remaining end is fixedly connected to the outer wall of the exhaust pipe; the exhaust pipe is provided with exhaust holes on the circumferential side wall.

[0015] By adopting the above technical scheme, when a connecting pipe is used for direct exhaust, it is possible to choose not to install the exhaust pipe and the cut-off pipe; when the connecting pipe needs to be connected to other pipelines, the exhaust pipe is connected and connected to the connecting pipe, and the cut-off pipe is connected to the smoke storage pipe. After the connection, the smoke in the smoke storage pipe is discharged from the exhaust hole; thereby improving the applicability of the arc exhaust duct.

[0016] Preferably, a mounting ring is provided at one end of the exhaust pipe close to the connecting pipe, and the connecting pipe is inserted into the mounting ring.

[0017] By adopting the above technical solution, the setting of the mounting ring makes it easy for the staff to connect the exhaust pipe with the connecting pipe, and makes it easy for the staff to change the shape of the arc exhaust duct according to different usage conditions.

[0018] Preferably, a speed increasing tube is coaxially arranged in the exhaust pipe, and one end of the speed increasing tube close to the arc tube is fixedly connected to the exhaust pipe; and the speed increasing tube gradually tapers from one end close to the arc tube to one end away from the arc tube.

[0019] By adopting the above technical solution, the setting of the speed-increasing tube increases the flow rate of the flue gas. At this time, the air pressure in the space between the speed-increasing tube and the exhaust pipe is reduced, which makes it easier to discharge the smoke in the smoke storage pipe, thereby reducing the occurrence of smoke return in the exhaust duct.

[0020] Preferably, the inner wall of the stop cylinder is connected with an adjusting piece; the four circumferential side walls of the stop cylinder are each connected with a group of adjusting pieces; multiple groups of adjusting pieces are used together to adjust the size of the air outlet of the stop cylinder; the adjusting piece includes an adjusting plate and an adjusting hydraulic cylinder, the adjusting plate abuts against the inner wall of the stop cylinder, and the adjusting plate is parallel to the corresponding inner wall of the stop cylinder; the width of the adjusting plate gradually decreases from the end close to the air inlet of the connecting pipe to the end away from the air inlet of the connecting pipe; the four circumferential side walls of the stop cylinder are each provided with an embedding groove along the closing direction thereof, the adjusting hydraulic cylinder is located between the adjusting plate and the stop cylinder and the adjusting hydraulic cylinder is located in the embedding groove; the adjusting hydraulic cylinder drives the adjusting plate to slide along its length.

[0021] By adopting the above technical solution, when the smoke is large, the adjusting part is located in the stop cylinder. At this time, the smoke flows from the connecting pipe to the stop cylinder, and the stop cylinder accelerates the smoke; thereby increasing the speed of the smoke out of the arc tube; when the smoke is less, the smoke flow rate is low, which makes the smoke relatively easy to diffuse, thereby causing smoke backflow, and at this time, the adjusting hydraulic cylinder is started, and the adjusting hydraulic cylinder drives the adjusting plate to move outside the stop cylinder. At this time, the opening of the cylindrical structure surrounded by the adjusting plate is smaller than the opening of the stop cylinder; thereby adjusting the size of the air outlet of the stop cylinder; at this time, the smoke is gradually gathered under the cooperation of the stop cylinder and multiple groups of adjusting parts, while increasing the smoke flow rate, making it difficult for the smoke to diffuse, thereby reducing the possibility of smoke backflow.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] 1. When using the arc exhaust duct, first connect the connecting pipe to the two ends of the arc pipe, and then connect the connecting pipe to other pipes; when exhausting, as the smoke flows into the arc pipe, the smoke is diverted under the action of the guide bend plate, which reduces the possibility of smoke forming vortex in the arc pipe, thereby reducing the possibility of smoke returning to the exhaust duct;

[0024] 2. When exhausting smoke, the setting of the stopper reduces the smoke flowing from the smoke inlet of the connecting pipe to the anti-overflow hole, thereby improving the anti-smoke return effect of the smoke storage pipe; the shrinkage setting of the stopper can make the return smoke flow to the anti-overflow hole, and at the same time, the smoke passing through the stopper with the shrinkage setting increases the gas flow rate; thereby reducing the turbulence and vortex formed by the return smoke, achieving the effect of reducing the possibility of return smoke;

[0025] 3. When using a connecting pipe for direct exhaust, you can choose not to install the exhaust pipe and the cut-off pipe; when the connecting pipe needs to be connected to other pipelines, connect the exhaust pipe to the connecting pipe and connect the cut-off pipe to the smoke storage pipe. After the connection, the smoke in the smoke storage pipe is discharged from the exhaust hole; thereby improving the applicability of the arc exhaust duct. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0027] Figure 2 It is a cross-sectional view showing the curved tube;

[0028] Figure 3 yes Figure 2 A magnified view of part A;

[0029] Figure 4 This is a cross-sectional view showing the adjustment member.

[0030] In the figure, 1, arc tube; 11, arc plate; 12, straight plate; 2, connecting tube; 21, anti-overflow hole; 3, guide bend plate; 4, smoke storage tube; 5, check plate; 6, stop cylinder; 61, embedded groove; 7, exhaust pipe; 71, exhaust hole; 72, mounting ring; 8, cut-off tube; 9, speed increasing tube; 10, adjusting member; 101, adjusting plate; 102, adjusting hydraulic cylinder. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-4 This application is described in further detail.

[0032] The embodiment of the present application discloses a circular arc exhaust duct.

[0033] refer to Figure 1 and Figure 2 The arc exhaust duct includes an arc tube 1, a connecting tube 2 and a guide curved plate 3; the arc tube 1 is a curved tube structure, and the arc tube 1 includes an arc plate 11 and a straight plate 12, and the arc plate 11 and the straight plate 12 are each provided with two pieces, and the two straight plates 12 are parallel to each other, and the two straight plates 12 and the arc plate 11 surround the arc tube 1; the connecting tube 2 is provided with two sections, and the two sections of the connecting tube 2 are respectively fixedly connected to the two ends of the arc tube 1, and the connecting tube 2 is used to connect the arc tube 1 with other pipelines to achieve The whole smoke exhaust pipe has a turning effect; the guide bend 3 is located in the arc tube 1, and the end face of the guide bend 3 is vertically fixedly connected to the straight plate 12; there are multiple guide bends 3, and the arc radii of the multiple guide bends 3 are the same, and the arc centers of the multiple guide bends 3 are distributed along a straight line; the arc length of the guide bend 3 close to the arc center is smaller than the arc length of the guide bend 3 far from the arc center; that is, as the guide bend 3 gradually approaches the center, the arc length of the end face of the guide bend 3 gradually decreases.

[0034] When the arc exhaust duct is used, the connecting pipe 2 is first connected to the two ends of the arc pipe 1, and then the connecting pipe 2 is used to connect other pipes; when exhausting, as the smoke flows into the arc pipe 1, the smoke is diverted under the action of the guide bend 3. The smoke diversion reduces the possibility of smoke forming vortices in the arc pipe 1, thereby reducing the possibility of smoke returning to the exhaust duct.

[0035] refer to Figure 2 and Figure 3 The arc tube 1 is provided with a smoke storage tube 4, which extends to the outside of the connecting tube 2; one end of the smoke storage tube 4 close to the air inlet end of the arc tube 1 is fixedly connected to the outer wall of the connecting tube 2, and the smoke storage tube 4 is provided with an anti-overflow hole 21 on the circumferential outer wall of the connecting tube 2 close to the air inlet end of the arc tube 1. A non-return plate 5 is hinged on the circumferential outer wall of the connecting tube 2, and the non-return plate 5 is used to close the anti-overflow hole 21.

[0036] refer to Figure 2 and Figure 3 A stopper cylinder 6 is connected to the circumferential inner wall of the connecting tube 2 near the air inlet end of the arc tube 1, and the outer wall of the stopper cylinder 6 corresponds to the anti-overflow hole 21. The end of the stopper cylinder 6 facing away from the arc tube 1 is fixedly connected to the connecting tube 2, and the stopper cylinder 6 gradually becomes a lock shape from the end facing away from the arc tube 1 to the end close to the arc tube 1.

[0037] When the arc exhaust duct is used to exhaust smoke, the smoke is discharged from the connecting pipe 2. At this time, the smoke flow rate is relatively high, and the air pressure around the smoke is reduced. At this time, the gas in the connecting pipe 2 is extracted under the action of the smoke storage pipe 4 and the anti-overflow hole 21; if there is smoke return, it is extracted under the action of the smoke storage pipe 4; at the same time, no external power is required, and the possibility of smoke return in the exhaust duct is reduced by relying on the smoke flow itself. The setting of the stopper 6 reduces the smoke flowing from the smoke inlet of the connecting pipe 2 to the anti-overflow hole 21, and improves the anti-smoke return effect of the smoke storage pipe 4; the shrinkage setting of the stopper 6 can make the smoke return flow to the anti-overflow hole 21, and at the same time, the smoke passes through the stopper 6 with the shrinkage setting to increase the gas flow rate; thereby reducing the turbulence and vortex formed by the smoke return, achieving the effect of reducing the possibility of smoke return.

[0038] refer to Figure 2 and Figure 3The arc exhaust duct also includes an exhaust pipe 7 and a stop pipe 8, which are located at one end near the air outlet of the arc pipe 1. The exhaust pipe 7 is coaxially connected and connected to the connecting pipe 2 near the air outlet end of the arc pipe 1; the stop pipe 8 is sleeved outside the exhaust pipe 7, one end is connected and connected to the smoke storage pipe 4, and the remaining end is fixedly connected to the outer wall of the exhaust pipe 7; an exhaust hole 71 is opened on the circumferential side wall of the exhaust pipe 7; a speed-increasing pipe 9 is coaxially arranged inside the exhaust pipe 7, and the end of the speed-increasing pipe 9 near the arc pipe 1 is fixedly connected to the exhaust pipe 7; and the speed-increasing pipe 9 gradually shrinks from the end near the arc pipe 1 to the end away from the arc pipe 1. And the end of the exhaust pipe 7 near the connecting pipe 2 is provided with a mounting, and the connecting pipe 2 is inserted into the mounting ring 72 to achieve the connection and connection between the connecting pipe 2 and the exhaust pipe 7.

[0039] During use, when the connecting pipe 2 is used for direct exhaust, it is possible to choose not to install the exhaust pipe 7 and the cut-off pipe 8; at this time, the smoke is directly discharged from the connecting pipe 2, and the air pressure around the connecting pipe 2 is reduced. At this time, the gas in the smoke storage pipe 4 is discharged from the smoke storage pipe 4 under the action of the high-speed gas blown out by the connecting pipe 2, thereby reducing the possibility of smoke return.

[0040] refer to Figure 2 and Figure 3 When the connecting pipe 2 needs to be connected to other pipelines, the exhaust pipe 7 is connected and connected to the connecting pipe 2, and the cut-off pipe 8 is connected to the smoke storage pipe 4. After the connection, the smoke in the smoke storage pipe 4 is discharged from the exhaust hole 71; the setting of the speed-increasing pipe 9 increases the flow rate of the smoke, and the air pressure in the space between the speed-increasing pipe 9 and the exhaust pipe 7 is reduced, which facilitates the discharge of the smoke in the smoke storage pipe 4. While reducing the possibility of smoke return in the exhaust pipe, the applicability of the arc exhaust pipe is improved; it is convenient for the staff to install the arc exhaust pipe according to different usage conditions.

[0041] refer to Figure 2 and Figure 4 , the inner wall of the stopper cylinder 6 is connected with an adjusting member 10; each of the four circumferential side walls of the stopper cylinder 6 is connected with a group of adjusting members 10; multiple groups of adjusting members 10 cooperate to adjust the size of the air outlet of the stopper cylinder 6. Specifically, the adjusting member 10 includes an adjusting plate 101 and an adjusting hydraulic cylinder 102, the adjusting plate 101 abuts against the inner wall of the stopper cylinder 6, and the adjusting plate 101 is parallel to the inner wall of the corresponding stopper cylinder 6; the width of the adjusting plate 101 gradually decreases from the end close to the air inlet of the connecting pipe 2 to the end away from the air inlet of the connecting pipe 2; the width of the end of the adjusting plate 101 is the same as the width of one of the side walls of the air outlet end of the adjusting cylinder; when the end of the adjusting plate 101 abuts against the upper end surface of the adjusting cylinder, multiple adjusting plates 101 form a cylindrical structure. The four circumferential side walls of the stopper cylinder 6 are provided with embedding grooves 61 along the closing direction thereof, and the adjusting hydraulic cylinder 102 is located between the adjusting plate 101 and the stopper cylinder 6 and in the embedding grooves 61 ; the adjusting hydraulic cylinder 102 drives the adjusting plate 101 to slide along its length.

[0042] When the smoke is large, the adjusting member 10 is located in the stop tube 6. At this time, the smoke flows from the connecting pipe 2 to the stop tube 6, and the stop tube 6 accelerates the smoke; thereby increasing the speed at which the smoke is discharged from the arc tube 1; when the smoke is small, the smoke flow rate is low, which makes the smoke relatively easy to diffuse, thereby causing smoke backflow. At this time, the adjusting hydraulic cylinder 102 is started, and the adjusting hydraulic cylinder 102 drives the adjusting plate 101 to move outside the stop tube 6. At this time, the opening of the cylindrical structure surrounded by the adjusting plate 101 is smaller than the opening of the stop tube 6; thereby achieving the size of the air outlet of the stop tube 6; at this time, the smoke gradually gathers under the cooperation of the stop tube 6 and multiple groups of adjusting members 10, while increasing the smoke flow rate, making it difficult for the smoke to diffuse, thereby reducing the possibility of smoke backflow.

[0043] The implementation principle of the arc exhaust duct in the embodiment of the present application is as follows: when exhausting, as the smoke flows toward the arc tube 1, the smoke is diverted under the action of the guide bend 3, and the possibility of smoke forming vortices in the arc tube 1 is reduced by the diversion of the smoke; at the same time, as the smoke flows, the air pressure around the smoke decreases, and at this time, under the action of the smoke storage tube 4 and the anti-overflow hole 21, the gas in the connecting tube 2 is extracted; if there is smoke return, it is extracted under the action of the smoke storage tube 4; at the same time, no external power is required, and the possibility of smoke return in the exhaust duct is reduced by relying on the smoke flow itself. At the same time, when used in conjunction with the adjustment member 10, the arc exhaust duct is suitable for different smoke sizes and smoke concentrations. The setting of the stopper cylinder 6 reduces the smoke flowing from the smoke inlet of the connecting pipe 2 to the anti-overflow hole 21, thereby improving the anti-smoke return effect of the smoke storage tube 4; the constricted setting of the stopper cylinder 6 can make the returned smoke flow to the anti-overflow hole 21, and at the same time, the smoke passing through the stopper cylinder 6 with the constricted setting increases the gas flow rate; thereby reducing the turbulence and vortex formed by the returned smoke, thereby reducing the possibility of smoke return in the arc exhaust duct.

[0044] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A circular arc exhaust duct, It is characterized in that include: The arc tube (1) is a curved tube structure, comprising two arc plates (11) and two straight plates (12) parallel to each other; the straight plates (12) and the arc plates (11) surround to form the arc tube (1); A connecting pipe (2) is provided with two sections, which are respectively connected to the two ends of the arc-shaped pipe (1) and are used to connect the arc-shaped pipe (1) with other pipelines; A guide bend plate (3) is located in the arc-shaped tube (1), and the end surface of the guide bend plate (3) is fixedly connected to the straight plate (12); a plurality of guide bend plates (3) are provided, and the arc radii of the end surfaces of the guide bend plates (3) are the same, and the convex surface of the guide bend plate (3) is located on a side close to the arc-shaped plate (11); The arc-shaped tube (1) is provided with a smoke storage tube (4) on its outer sleeve, and the smoke storage tube (4) extends to the outside of the connecting tube (2); one end of the smoke storage tube (4) close to the air inlet end of the arc-shaped tube (1) is fixedly connected to the outer wall of the connecting tube (2); an anti-overflow hole (21) is provided on the circumferential side wall of the connecting tube (2) close to the air inlet end of the arc-shaped tube (1); The circumferential inner wall of the connecting pipe (2) close to the air inlet end of the arc-shaped pipe (1) is connected to a stopper cylinder (6), and the outer wall of the stopper cylinder (6) corresponds to the anti-overflow hole (21); the end of the stopper cylinder (6) facing away from the arc-shaped pipe (1) is fixedly connected to the connecting pipe (2); and the stopper cylinder (6) gradually shrinks from the end facing away from the arc-shaped pipe (1) to the end close to the arc-shaped pipe (1); The inner wall of the stopper cylinder (6) is connected to an adjusting piece (10); four circumferential side walls of the stopper cylinder (6) are each connected to a set of adjusting pieces (10); and the plurality of sets of adjusting pieces (10) are used in conjunction to adjust the size of the air outlet of the stopper cylinder (6); The adjusting member (10) comprises an adjusting plate (101) and an adjusting hydraulic cylinder (102); the adjusting plate (101) abuts against the inner wall of the stopper cylinder (6), and the adjusting plate (101) is parallel to the inner wall of the corresponding stopper cylinder (6); the width of the adjusting plate (101) gradually decreases from an end close to the air inlet of the connecting pipe (2) to an end far from the air inlet of the connecting pipe (2); The four circumferential side walls of the stopper cylinder (6) are all provided with embedding grooves (61) along the closing direction thereof; the adjusting hydraulic cylinder (102) is located between the adjusting plate (101) and the stopper cylinder (6) and in the embedding grooves (61); the adjusting hydraulic cylinder (102) drives the adjusting plate (101) to slide along its length.

2. The arc exhaust duct according to claim 1, Features: A non-return plate (5) is hingedly connected to the circumferential outer wall of the connecting pipe (2), and the non-return plate (5) is used to seal the anti-overflow hole (21).

3. The arc exhaust duct according to claim 1, Features: The plurality of guide bends (3) are distributed along the radius of the circular arc; the arc length of the guide bend (3) close to the center of the circular arc is smaller than the arc length of the guide bend (3) far from the center of the circular arc.

4. The arc exhaust duct according to claim 1, Features: It also comprises an exhaust pipe (7) and a cut-off pipe (8); the exhaust pipe (7) is coaxially connected and communicated with the connecting pipe (2) near the gas outlet end of the arc-shaped pipe (1); the cut-off pipe (8) is sleeved outside the exhaust pipe (7), one end of which is connected and communicated with the smoke storage pipe (4), and the remaining end is fixedly connected to the outer wall of the exhaust pipe (7); an exhaust hole (71) is provided on the circumferential side wall of the exhaust pipe (7).

5. The arc exhaust duct according to claim 4, Features: A mounting ring (72) is provided at one end of the exhaust pipe (7) close to the connecting pipe (2), and the connecting pipe (2) is inserted into the mounting ring (72).

6. The arc exhaust duct according to claim 4, Features: A speed-increasing tube (9) is coaxially arranged in the exhaust pipe (7); one end of the speed-increasing tube (9) close to the arc-shaped tube (1) is fixedly connected to the exhaust pipe (7); and the speed-increasing tube (9) gradually narrows from the end close to the arc-shaped tube (1) to the end away from the arc-shaped tube (1).

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