CN212080461U - T-shaped three-way pipe - Google Patents
T-shaped three-way pipe Download PDFInfo
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- CN212080461U CN212080461U CN202020202853.4U CN202020202853U CN212080461U CN 212080461 U CN212080461 U CN 212080461U CN 202020202853 U CN202020202853 U CN 202020202853U CN 212080461 U CN212080461 U CN 212080461U
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Abstract
The utility model provides a T-shaped three-way pipe, which comprises a straight-through pipe, wherein the straight-through pipe comprises a first opening and a second opening which are arranged at two opposite ends, the straight-through pipe comprises a first side wall and a second side wall which are arranged oppositely, the first side wall and the second side wall are both connected with the first opening and the second opening, and the second side wall is provided with a third opening; one end of the side branch pipe is communicated with the third opening, and the other end of the side branch pipe is provided with a fourth opening; wherein the first sidewall of the straight-through tube comprises an arcuate wall that projects in a direction away from the second sidewall. The T-shaped three-way pipe can reduce the local resistance of the T-shaped three-way pipe and reduce the total pressure loss.
Description
Technical Field
The utility model relates to a pipe fitting technical field especially relates to a T type three-way pipe.
Background
The three-way pipe is widely used in pipe networks for conveying fluids such as liquid, gas and the like, and has the function of changing the direction of the fluids. T-tee is the most basic connecting member in pipe networks, often used for fluid diversion at right angle bends.
The fluid forms a vortex locally where the flow rate, the flow direction and the shape of the end surface of the pipeline change, which causes energy loss. The traditional T-shaped three-way pipe has large local resistance at the tee flow dividing position, the energy loss is serious in the fluid flow dividing process, the resistance problem of a ventilation air-conditioning pipeline system adopting the T-shaped three-way pipe is outstanding, and the energy consumption problem of a fan is obvious.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention provides a T-shaped three-way pipe to solve the technical problem of how to reduce the resistance of the T-shaped three-way pipe at the three-way shunt.
In order to achieve the above purpose, the technical scheme of the utility model is realized like this:
the embodiment of the utility model provides a T-shaped three-way pipe, this T-shaped three-way pipe includes through pipe, through pipe includes first opening and the second opening that sets up at relative both ends, through pipe includes relative first lateral wall and the second lateral wall that sets up, first lateral wall and second lateral wall all connect first opening with the second opening, the third opening has been seted up to the second lateral wall; one end of the side branch pipe is communicated with the third opening, and the other end of the side branch pipe is provided with a fourth opening; wherein the first sidewall of the straight-through tube comprises an arcuate wall that projects in a direction away from the second sidewall.
Further, the fourth opening is a centrosymmetric structure, and a central axis of the fourth opening can intersect with the arc-shaped wall.
Further, the inner wall surface of the arc-shaped wall is an arc surface.
Further, the center of the circular arc surface is located on the central axis of the fourth opening.
Further, along the direction parallel to the central axis of the fourth opening, the length of the first opening and the length of the second opening are both Wc, the protruding height of the arc-shaped wall is H, and the range of H/Wc is 0.08-0.23.
Further, the range of the H/Wc is 0.08-0.15.
Further, other branch pipe is including all connecting third opening and fourth opening's third lateral wall and fourth lateral wall, the third lateral wall including the skew wall of connecting the second lateral wall and with be connected the skew wall with the straight wall of fourth opening, the skew wall with the contained angle of second lateral wall and the skew wall with the contained angle of straight wall is the obtuse angle.
Further, the inner surfaces of the straight walls are parallel to the inner surface of the fourth side wall and are all perpendicular to the extending direction of the straight-through pipe.
Furthermore, the straight-through pipe comprises a fifth side wall and a sixth side wall which are connected with the first side wall and the second side wall, the first side wall, the second side wall, the fifth side wall and the sixth side wall enclose the straight-through pipe, and the inner surfaces of the second side wall, the fifth side wall and the sixth side wall are rectangular.
Further, the first side wall is the arc-shaped wall, and the cross section of the first opening is the same as that of the second opening.
The embodiment of the utility model provides a T type three-way pipe, direct pipe are including relative first lateral wall and the second lateral wall that sets up, and first lateral wall includes the arc wall, and the second lateral wall is connected with other branch pipe, the arc wall is to keeping away from the direction protrusion of second lateral wall. A part of fluid in the straight-through pipe is shunted to enter the side branch pipe, the rest part of fluid continues to flow along the straight-through pipe, and at the three-way shunt position in the straight-through pipe, the flow rate of the fluid at the side close to the side branch pipe is small, the pressure of the fluid at the side far away from the side branch pipe is large, so that the fluid has pressure difference along a section perpendicular to the speed to generate vortex, and the vortex action causes energy loss. Through to keeping away from the direction of second lateral wall sets up convex arc wall, can guide some fluid to flow along protruding arc wall, increase the interior space of keeping away from other branch pipe department of through-pipe, reduce the interior fluid pressure who keeps away from other branch pipe department of through-pipe, reduce the through intraductal fluid along with the pressure difference on the velocity vertically section, avoid the production of vortex to reduce local resistance, reduce energy loss.
Drawings
Fig. 1 is a schematic structural diagram of a T-shaped three-way pipe provided in an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a T-shaped three-way pipe provided by a comparative example of the prior art;
fig. 3 is a schematic view of a gas flow direction of a T-shaped three-way pipe provided in an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an arc-shaped wall of a T-shaped three-way pipe provided by an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a T-shaped tee pipe provided by a comparative example of the prior art;
fig. 6 is a schematic structural diagram of a T-shaped three-way pipe provided by an embodiment of the present invention.
Description of reference numerals:
10-straight tube, 11-first opening, 12-second opening, 13-first side wall, 131-arc wall, 14-second side wall, 15-third opening, 16-fifth side wall, 17-sixth side wall, 20-side branch tube, 21-fourth opening, 22-third side wall, 221-inclined wall, 222-straight wall, 23-fourth side wall.
Detailed Description
The technical solution of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Various combinations of the specific features in the embodiments described in the detailed description may be made without contradiction, for example, different embodiments may be formed by different combinations of the specific features, and in order to avoid unnecessary repetition, various combinations of the specific features in the present invention are not separately described.
In the following description, references to the terms "first/second" are only intended to distinguish between similar items and not to imply a particular order to the items, but it is to be understood that "first/second" is to be interpreted as interchangeable under the appropriate circumstances with respect to the particular order or sequence so that the embodiments of the invention described herein can be practiced in other sequences than those illustrated or described herein.
In a specific embodiment, the T-shaped tee can be used for conveying gas pipelines and can also be used for conveying liquid pipelines. For example, the T-shaped tee joint can be used for a ventilation air conditioning system, a natural gas conveying system, a water or oil conveying pipeline and the like, and the T-shaped tee joint can be made of metal, plastic, glass and the like according to different conveying media. The T-shaped tee is mainly used for shunting and changing the direction of fluid in a conveying pipeline.
In the embodiment of the scheme, as shown in fig. 1, the T-shaped tee comprises a straight pipe 10 and a side branch pipe 20 communicated with the straight pipe 10, and the straight pipe 10 and the side branch pipe 20 are connected to form a T-shaped structure, so that the fluid is divided at the tee. The straight pipe 10 is a main pipe, and the side branch pipe 20 is a branch pipe. Specifically, the fluid flows into the straight pipe 10, a branch is formed at the tee joint of the straight pipe 10 and the side branch pipe 20 of the T-shaped tee, a part of the fluid enters the side branch pipe 20, and the rest of the fluid continues to flow forwards along the straight pipe 10. Alternatively, the through pipe 10 and the side branch pipe 20 may be substantially rectangular pipes or substantially cylindrical pipes.
As shown in fig. 1, opposite ends of the through pipe 10 are provided with a first opening 11 and a second opening 12. Wherein one opening is an inlet for the fluid and the other opening is an outlet for a portion of the fluid. The straight-through pipe 10 comprises a first side wall 13 and a second side wall 14 which are oppositely arranged, and the opposite arrangement indicates that a certain space is formed between the first side wall 13 and the second side wall 14, and the two side walls are positioned at two ends of the space. In the case of a straight-through pipe 10 of generally rectangular shape, the first side walls 13 are located at opposite orientations of the second side walls 14 and are spaced apart without direct connection; in the case of a substantially cylindrical tube of the through pipe 10, the first side wall 13 is located in the opposite orientation to the second side wall 14 and can be directly connected.
As shown in fig. 1, the first sidewall 13 and the second sidewall 14 each connect the first opening 11 and the second opening 12. In the case where the through pipe 10 is a substantially rectangular pipe, the first side wall 13, the second side wall 14, and the other side walls for connecting the two side walls are connected together to form the first opening 11 and the second opening 12; in case the through pipe 10 is substantially cylindrical, the first side wall 13 and the second side wall 14 may be directly connected to form said first opening 11 and second opening 12.
As shown in fig. 1, the second side wall 14 is opened with a third opening 15 for allowing a portion of the fluid in the through pipe 10 to flow out of the third opening 15. One end of the bypass pipe 20 is communicated with the third opening 15, and the other end is provided with a fourth opening 21. Specifically, the fluid flowing out of the third opening 15 enters the bypass pipe 20, changes the original flow direction and flow rate, flows through the bypass pipe 20, and finally flows out of the fourth opening 21 of the bypass pipe 20. It should be noted that the size of the straight pipe 10 and the size of the side branch pipe 20 can be set according to the actual flow rate and flow velocity of the fluid. The third opening 15 may be formed in a size corresponding to the size of the bypass pipe 20 such that one end of the bypass pipe 20 is coupled to the third opening 15 and tightly coupled thereto. The T-shaped tee may be formed by integrally molding the straight pipe 10 and the side branch pipe 20 through a mold, or may be formed by connecting the straight pipe 10 and the side branch pipe 20 by a specific method such as welding, so long as the straight pipe 10 and the side branch pipe 20 are tightly connected.
Fig. 2 shows a schematic structural diagram of a T-tee provided by a comparative example, fig. 3 shows a schematic structural diagram of a T-tee provided by the present embodiment, and a flow state of fluid in the T-tee is now described with reference to fig. 2 and 3. Specifically, the fluid flows into the through pipe 10 from the first opening 11, and when passing through the tee joint, a part of the fluid is branched from the third opening 15 into the bypass pipe 20 and then flows out from the fourth opening 21, and the rest of the fluid continues to flow forward along the through pipe 10 and then flows out from the second opening 12. According to fluid mechanics, energy losses occur due to eddy currents and impact effects as the fluid passes through turns, changes in the end faces, and joints of pipes.
As shown in fig. 2, the T-tee changes the flow and direction of the fluid at the tee, a portion of the fluid is diverted into the bypass pipe 20, and the remaining portion of the fluid continues to flow forward in the direction of the straight pipe 10. The flow rate of the residual fluid in the straight-through pipe 10 in the direction far from the side branch pipe 20 is greater than the flow rate of the fluid in the direction close to the side branch pipe 20, the pressure in the straight-through pipe 10 in the direction far from the side branch pipe 20 is greater than the pressure in the direction close to the side branch pipe 20, and the fluid has a pressure difference along a section perpendicular to the speed, so that the fluid flowing to the front of the straight-through pipe 10 flows back to a small pressure area to generate a vortex, thereby generating local resistance and causing energy loss.
In the embodiment of the present solution, as shown in fig. 3, the first side wall 13 of the through pipe 10 includes an arc-shaped wall 131, and the arc-shaped wall 131 protrudes away from the second side wall 14. The arc-shaped wall 131 means that the inner surface of the pipeline is a smooth arc surface without a sharp point, the arc-shaped wall can comprise a plurality of arc surfaces, and the radius of a ball corresponding to each arc surface can be changed or not. The outer wall shape and the wall thickness of the first side wall can be set according to the actual installation space and the stress condition. The first side wall 13 of the straight-through pipe 10 includes an arc-shaped wall 131, the second side wall 14 is opened with a third opening 15, the arc-shaped wall 131 protrudes in a direction away from the second side wall 14, that is, the arc-shaped wall 131 protrudes in a direction away from the third opening 15, and the arc-shaped wall can guide the fluid to flow along the arc-shaped wall before the fluid flows through the tee joint and provide a containing space for the fluid at the tee joint.
Through the arrangement, the arc-shaped wall 131 protrudes in the direction away from the second side wall 14, and the protruding arc-shaped wall 131 can guide the fluid at the tee joint to flow and provide a space for the fluid, so that when the fluid flows through the tee joint branch part of the T-shaped tee joint, the pressure of the fluid in the straight-through pipe 10 in the direction away from the side branch pipe 20 is reduced, the situation that the pressure in the straight-through pipe 10 in the direction away from the side branch pipe 20 is greater than the pressure in the direction close to the side branch pipe 20 due to the fact that the flow of the fluid in the straight-through pipe 10 in the direction away from the side branch pipe 20 is greater than the pressure in the direction close to the side branch pipe 20 is avoided, the pressure of the fluid in the straight-through pipe 10 in the direction perpendicular to the flow velocity direction is balanced, the pressure difference is small, the generation of eddy.
Optionally, the arc-shaped wall may be formed by splicing a plurality of arc-shaped surfaces. For example, the first side wall 13 of the straight-through pipe 10 includes the arc-shaped wall 131 and the straight wall connected to both ends of the arc-shaped wall, and another arc-shaped wall is added to the portion where the arc-shaped wall is connected to the straight wall to smoothly connect the arc-shaped wall and the straight wall, so that the shape of the first side wall is more gradual, and there is no inflection point, which helps to further reduce the flow resistance in the straight-through pipe 10 and further reduce the energy loss.
Optionally, the straight-through pipe 10 may include an arc-shaped wall 131 in a local area, or may be an arc-shaped wall 131 as a whole; the protruding direction of the arc-shaped wall may be perpendicular to the second sidewall, or may have an angle with the second sidewall, as long as the arc-shaped wall 131 protrudes away from the second sidewall 14.
In some embodiments, as shown in fig. 4, the fourth opening 21 is a central symmetrical structure, and the central axis 24 of the fourth opening 21 can intersect with the arc-shaped wall 131. The central axis 24 is referred to as passing through the center of the fourth opening 21 and is perpendicular to the fourth opening 21, where the fourth opening 21 is perpendicular to the flow direction of the fluid in the bypass duct 20. The central axis 24 of the fourth opening 21 can intersect the curved wall 131 such that the curved wall 131 is at least partially located on an extension of the side branch 20, i.e., the curved wall 131 is partially located on a facing side of the third opening 15.
It will be appreciated that after the fluid is diverted into the bypass pipe 20, the flow rate of the fluid in the through pipe 10 is maximized in the direction away from the third opening 15 of the bypass pipe 20, the pressure is maximized, the pressure difference is maximized, and the area of the generated vortex is maximized. By arranging the arc-shaped wall 131 partially on the opposite surface of the third opening 15, the pressure can be balanced in a key area, vortex generation can be avoided, the local resistance can be further reduced, and the energy loss of the fluid can be reduced.
In some embodiments, the inner wall surface of the arc-shaped wall 131 is a circular arc surface. The inner wall surface is an arc surface, and the surface of the inner side of the pipeline is a smooth arc surface. Namely: the inner wall of the arc-shaped wall is an arc surface which belongs to a spherical surface. The inner wall surface of the arc-shaped wall 131 is designed to be an arc surface, so that the arc-shaped wall 131 is simpler to arrange and is convenient to manufacture; and the design of the optimal pipeline for drag reduction is determined according to experiments, unified implementation is carried out, and the standardization of the pipeline with optimized resistance is pushed.
In some embodiments, the center of the circular arc surface 131 is located on the central axis 24 of the fourth opening 21, that is, the highest point of the protrusion of the circular arc surface 131 is located on the central axis 24 of the fourth opening, that is, the space of the fluid in the straight-through pipe 10 at the central axis 24 of the fourth opening is the largest.
It will be appreciated that after the fluid splits into the side branch 20, the flow rate of the fluid in the through pipe 10 is greater in the direction away from the third opening 15 of the side branch 20 than in the direction close to the third opening, and the pressure is greater, so that the pressure difference in the through pipe 10 at the central axis 24 is maximized, and the vortex area created is maximized. By increasing the space of the fluid in the straight-through pipe 10 at the central axis 24 of the fourth opening 21, the pressure of the fluid in the straight-through pipe 10 in the direction away from the third opening 15 of the bypass pipe 20 can be further reduced, the pressure difference can be reduced, the generation of vortex can be avoided, the local resistance can be further reduced, and the energy loss can be reduced.
In some embodiments, as shown in FIG. 4, the length of the first opening 11 and the length of the second opening 12 are Wc in a direction parallel to the central axis 24 of the fourth opening 21, the protruding height of the arc-shaped wall 131 is H, and H/Wc ranges from 0.08 to 0.23.
Specifically, as shown in fig. 4, the lengths of the first opening 11 and the second opening 12 are equal and are both set to Wc in a direction parallel to the central axis 24 of the fourth opening 21, that is, in a direction perpendicular to the extending direction of the through pipe 10. The protrusion height of the arc-shaped wall 131 refers to a distance from the highest point of the arc-shaped wall 131 to a connection surface defined by both ends of the arc-shaped wall 131, and is set as H. The height of the protrusion of the arc wall 131 is set according to the size of the through pipe 10, and when the resistance in the direction of the through pipe 10 is the largest, the proper height of the protrusion of the arc wall 131 is determined by the flow rate ratio and the area ratio of the through pipe 10 to the main pipe, which means the pipe portion on the through pipe 10 where the fluid flows in without being branched.
Specifically, the height of the arc surface is determined by a numerical simulation method, the height of the arc wall 131 is H, the length of the first opening 11 and the length of the second opening 12 are Wc, and H is defined as H/Wc, where H is a dimensionless height of the arc wall. 50 dimensionless protrusion heights h were designed according to each pipe structure, specifically, h was 0.01, 0.02, 0.03, 0.04, 0.05 … … 0.46, 0.47, 0.48, 0.49, 0.50, and the optimum protrusion height was determined by a numerical simulation method. According to experimental calculation, the height H of the bulge of the arc-shaped wall 131 is set to be 0.08-0.23 times of the opening length Wc of the straight-through pipe 10, so that the resistance of the worst loop is obviously reduced, and the energy loss of the whole T-shaped three-way pipe is obviously reduced.
In some embodiments, the H/Wc ranges from 0.08 to 0.15. When the resistance in the direction of the side branch pipe 20 is the maximum, the proper protrusion height of the arc-shaped wall 131 is determined according to the flow ratio and the area ratio of the side branch pipe 20 and the main pipe, and according to experimental calculation, the protrusion height H of the arc-shaped wall 131 is set to be 0.08-0.15 times of the opening length Wc of the straight-through pipe 10, so that the resistance of the worst loop is obviously reduced, and the energy loss of the whole T-shaped three-way pipe is obviously reduced.
In some embodiments, as shown in fig. 4, the bypass pipe 20 includes a third sidewall 22 and a fourth sidewall 23 both connecting the third opening 15 and the fourth opening 31, and the third sidewall 22 includes an inclined wall 221 connecting the second sidewall 12 and a straight wall 222 connecting the inclined wall 221 and the fourth opening 21.
Specifically, the bypass pipe 20 is communicated with the straight-through pipe 10 through the third opening 15, the third side wall and the fourth side wall of the bypass pipe may be a cambered surface or a plane, the portion of the bypass pipe 20, which is connected with the third opening 15 and the fourth opening, of the side wall 22 is an inclined wall 221, and the portion, which is connected with the inclined wall 221 and the fourth opening 21, of the side wall is a straight wall 222. The inclined wall 221 and the straight wall 222 are both referred to the central axis 24 of the fourth opening 21, and are straight walls parallel to the central axis 24, and are inclined walls in the opposite direction.
The included angle between the inclined wall 221 and the second sidewall 14 and the included angle between the inclined wall 221 and the straight wall 222 are both obtuse angles. That is, the sharp angle at the junction of the third side wall 22 of the bypass pipe 20 and the second side wall of the straight-through pipe 10 is chamfered to make the sharp angle gentle. It should be noted that the third side wall 22 of the side branch pipe 20 is close to the fluid inlet of the through pipe, and the fourth side wall 23 is far from the fluid inlet. By the arrangement, the fluid in the straight-through pipe can be guided to flow into the side branch pipe, so that the change of the direction of the fluid is smoother.
It can be understood that, in the case of a sharp change of the fluid flow direction, the fluid particles are subjected to centrifugal force at the turning point, deceleration and pressurization occur at the outer side, the inner side has small flow and small pressure, and the fluid generates a pressure difference in the direction perpendicular to the flow velocity, so that the fluid flowing to the front of the bypass pipe flows back to the small pressure area, a vortex is generated, and thus local resistance is generated, and energy loss is caused.
By arranging the inclined wall 221, when fluid flows into the side branch pipe 20 from the straight pipe 10, the change of the direction of the fluid is more gradual, the centrifugal force of the fluid at a turning part is smaller, the pressure difference in the side branch pipe 20 along the direction perpendicular to the flow velocity of the fluid is smaller, and the generation of vortex in the side branch pipe 20 is avoided, so that the local resistance is further reduced, and the energy loss is reduced.
In some embodiments, as shown in fig. 4, the inner surfaces of the straight walls 222 are parallel to the inner surface of the fourth side wall 23 and are all perpendicular to the extending direction of the through pipe 10. The straight wall 222 and the fourth side wall 23 of the third side wall 22 of the side branch pipe 20 are perpendicular to the straight-through pipe 10 or the extending direction of the straight-through pipe 10, that is, the side branch pipe 20 is integrally and perpendicularly communicated with the straight-through pipe 10, so that the flowing direction of the fluid can meet the change of 90 degrees, the local resistance of the fluid at a turning part is reduced, and when the fluid flows in the side branch pipe, the friction resistance between the fluid and the pipe wall is smaller due to the fact that the straight wall and the fourth side wall of the side branch pipe are parallel, the resistance of the fluid in the side branch pipe is favorably reduced, and the energy loss is further reduced.
Alternatively, the length of the fourth opening in the direction perpendicular to the central axis 24 of the fourth opening 21 is set to Wb. The height of the inclined wall may be 0.25 times the length Wb of the fourth opening in a direction parallel to the central axis 24 of the fourth opening 21. With this arrangement, the local resistance when the direction of the fluid is changed can be reduced, and the frictional resistance of the fluid flowing in the straight-through pipe 10 is not increased, so that the flow resistance is reduced as a whole, and the energy loss of the fluid is further reduced.
In some embodiments, the through pipe 10 comprises a fifth side wall 16 and a sixth side wall 17 connected with the first side wall 13 and the second side wall 14, the first side wall 13, the second side wall 14, the fifth side wall 16 and the sixth side wall 17 enclose the through pipe 10, and the inner surfaces of the second side wall 14, the fifth side wall 16 and the sixth side wall 17 are all rectangular. The inner surfaces are all rectangular, which means that the inner side surfaces of the side walls are rectangular. The straight-through pipe is a rectangular pipe, so that the pipeline is easier to process, the connection part of the straight-through pipe 10 and the side branch pipe 20 is simpler to set, the spatial direction arrangement of the pipeline is more convenient, the heat preservation is convenient, and the construction technology difficulty is lower.
In some embodiments, the first sidewall 11 is the arc-shaped wall 131, and the cross section of the first opening 11 is the same as that of the second opening 12. The cross section is a section perpendicular to the direction of extension of the through pipe 10. In this embodiment the entire first side wall is an arc-shaped wall, the first opening and the second opening are identical in shape and both openings comprise an arc-shaped edge in shape. With the arrangement, the first side wall 13 is a smooth cambered surface without an inflection point, so that the friction force between the fluid and the inner wall is smaller when the fluid flows in the straight-through pipe, the flow resistance is further reduced, and the energy loss is reduced.
In some embodiments, with the T-branch pipe provided by the embodiments of the present invention, as shown in fig. 3, according to the experimental calculation, the drag reduction rate in the direction of the straight pipe 10 can reach 33.4%, and the drag reduction rate in the direction of the side branch pipe 20 can reach 17%, where the drag reduction rate is calculated as follows:
step 1: and measuring the local resistance of the common tee at the tee. As shown in FIG. 5, the pressure at sections a and d with the tee is measured and is denoted P1aAnd P1d(ii) a Measuring the pressure at the sections a, b, c and d when the common three-way pipe is not provided, the air supply speed of the pipe section is the same as that when the three-way pipe is provided, and the measured pressure is respectively recorded as P2a、P2b、P2cAnd P2d(ii) a Calculating the local resistance of the common three-way pipe at the three-way position: v. Pbc＝P1a–P1d-(P2a-P2b)-(P2c-P2d)。
Step 2: the local resistance of the tee improved by the present application at the tee is measured, as shown in fig. 6, the pressure at the section a 'and d' with the tee is measured, and is respectively marked as P1a' and P1d'; measuring the pressure at the sections a ', b', c 'and d' of the single pipe sections without the tee joint, wherein the air supply speed of the pipe sections is the same as that of the pipe sections with the tee joint, and the measured pressure is respectively marked as P2a ', P2 b', P2c 'and P2 d'; calculating the local resistance of the improved tee at the tee: v Pb ' c ═ P1a ' -P1 d ' - (P2a ' -P2b ') - (P2c ' -P2d ').
And step 3: and (3) calculating: (. Pbc-. Pb 'c')/. Pbc × 100%, which is the drag reduction rate in the direction of the feed-through tube, the drag reduction rate can reach 33.4%.
Similarly, the drag reduction rate in the bypass direction is calculated in the same manner as described above. Except that in step 1, as shown in fig. 5, the pressure at the sections e and f is measured, and the local resistance P of the common tee in the direction of the bypass pipe at the tee is calculatedbe＝P1a–P1f-(P2a-P2b)-(P2e-P2f) (ii) a In step 2, as shown in fig. 6, the pressures at sections e 'and f' are measured, and the local resistance P of the bypass direction improvement tee at the tee is calculatedb’e’＝P1a’–P1f’-(P2a’-P2b’)-(P2e’-P2f') to a host; finally, calculate ([ P ]be-▽Pb’e’)/▽PbeX 100 percent, namely the drag reduction rate in the direction of the side branch pipe, and the drag reduction rate can reach 17 percent.
It should be noted that, when it is necessary to take pressure near the tee, if the pressure taking point is selected before the tee, for example, the distance between the pressure taking point and the tee must be greater than 2 times of the diameter (equivalent diameter) of the pipeline; if the pressure point is chosen after the tee, for example, the sections d, f, d 'and f' are located at a distance from the tee that is 4-5 times greater than the diameter of the pipe (equivalent diameter).
The utility model provides a modified T type three-way pipe can reduce the resistance of direct pipe and other branch pipe direction, reduces the total head loss, helps energy saving and consumption reduction to reduce the fan and select the type and practice thrift the cost.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (10)
1. A T-shaped three-way pipe is characterized by comprising:
the straight-through pipe comprises a first opening and a second opening which are arranged at two opposite ends, the straight-through pipe comprises a first side wall and a second side wall which are oppositely arranged, the first side wall and the second side wall are both connected with the first opening and the second opening, and the second side wall is provided with a third opening;
one end of the side branch pipe is communicated with the third opening, and the other end of the side branch pipe is provided with a fourth opening;
wherein the first sidewall of the straight-through tube comprises an arcuate wall that projects in a direction away from the second sidewall.
2. The tee of claim 1, wherein the fourth opening is a centrosymmetric structure, a central axis of the fourth opening capable of intersecting the arcuate wall.
3. The T-branch as claimed in claim 2, wherein an inner wall surface of the arc-shaped wall is an arc surface.
4. The tee of claim 3, wherein the circular arc surface is centered on a central axis of the fourth opening.
5. The T-tee of any one of claims 2-4, wherein the length of the first opening and the length of the second opening are Wc in a direction parallel to the central axis of the fourth opening, the arcuate wall has a protrusion height H, and H/Wc ranges from 0.08 to 0.23.
6. The T-shaped tee of claim 5, wherein the H/Wc ranges from 0.08 to 0.15.
7. The tee of claim 1, wherein the bypass leg comprises third and fourth sidewalls each connecting the third and fourth openings, the third sidewall comprises an angled wall connecting the second sidewall and a straight wall connecting the angled wall and the fourth opening, and the angle between the angled wall and the second sidewall and the angle between the angled wall and the straight wall are obtuse angles.
8. The tee of claim 7, wherein the inner surfaces of the straight walls are parallel to the inner surface of the fourth sidewall and are all perpendicular to the direction of extension of the straight through pipe.
9. The tee of claim 1, wherein the straight-through tube comprises a fifth sidewall and a sixth sidewall connected to a first sidewall and a second sidewall, the first sidewall, second sidewall, fifth sidewall and sixth sidewall enclosing the straight-through tube, the second sidewall, fifth sidewall and sixth sidewall having rectangular inner surfaces.
10. The tee of claim 9, wherein the first sidewall is the arcuate wall, the first opening being the same cross-section as the second opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020202853.4U CN212080461U (en) | 2020-02-21 | 2020-02-21 | T-shaped three-way pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020202853.4U CN212080461U (en) | 2020-02-21 | 2020-02-21 | T-shaped three-way pipe |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113639276A (en) * | 2021-07-30 | 2021-11-12 | 西安建筑科技大学 | Anti-smoke-channeling three-way flue and control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113639276A (en) * | 2021-07-30 | 2021-11-12 | 西安建筑科技大学 | Anti-smoke-channeling three-way flue and control method thereof |
| CN113639276B (en) * | 2021-07-30 | 2022-08-16 | 西安建筑科技大学 | Anti-smoke-channeling three-way flue and control method thereof |
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