A type of tee pipe

Abstract

This invention discloses a tee pipe, comprising a main pipe and an inclined branch pipe. The main pipe has a main channel for medium flow. The inclined branch pipe is connected to the peripheral wall of the main pipe and has an inclined channel communicating with the main channel, wherein the angle formed between the flow direction of the inclined channel and the flow direction of the main channel is an acute angle. The inner wall of the main channel has a wear region, which is opposite to the flow direction of the inclined branch pipe, and the wear region is provided with a wear-resistant layer. A turbulence-inducing structure is provided inside the main pipe. This invention specifically sets a wear-resistant layer in the wear region, thereby saving wear-resistant materials while ensuring the wear resistance and lifespan of the pipe, and allowing for the targeted use of materials with good wear resistance in the wear-resistant layer. The turbulence-inducing structure reduces eddies caused by the fluid flowing in from the inclined branch pipe, reducing or even eliminating low-speed regions caused by eddies, preventing dust from accumulating in these low-speed eddy regions, and reducing the risk of pipe collapse due to dust accumulation.

Description

Technical Field

[0001] This invention relates to the field of connecting pipes, and in particular to a tee pipe. Background Technology

[0002] Currently, tee pipes are often used in fluid piping systems to collect fluids.

[0003] For example, in ventilation and dust removal systems, the power generated by a fan is used to send dust-laden gas through dust removal ducts into the dust removal equipment for purification. The purified gas is then discharged through an exhaust stack, thus achieving the goal of purifying the air environment. T-joints are widely used as an important component in ventilation and dust removal systems. They can be used to merge two dust-laden airflows into one, ultimately introducing the system's dust-laden airflow into a single dust removal device for purification. Therefore, the use of tees can reduce the number of dust removal devices and decrease the initial investment of the project. Currently, tees in ventilation and dust removal systems mainly have the following shortcomings:

[0004] 1. When the airflow from the branch pipe of the three-way pipe mixes with the airflow from the main pipe, it will have a strong collision with the airflow from the main branch pipe, resulting in local high pressure and a large energy exchange. A large number of eddies are generated in the confluence area, which increases the local resistance coefficient at the confluence point, increases the resistance loss of the dust removal system, and thus increases the energy consumption of the fan.

[0005] 2. Dust in the ventilation and dust removal system can cause erosion and wear on the pipes. In order to prevent the pipes from being worn through, most systems currently use the same wear-resistant treatment for both the tee pipe and the outlet pipe of the tee. However, only a small part of the tee is easily worn through. This indiscriminate wear-resistant treatment not only fails to protect the easily worn parts of the tee well, but also wastes wear-resistant materials.

[0006] 3. When the tee branch pipe merges into the main pipe, it will form a vortex zone in its leeward area. The speed in the vortex zone decreases, and the dust in the dust removal pipe will settle in the low speed zone. After a period of time, a thick layer of dust will accumulate in the vortex zone. The deposited dust will not only disturb the airflow in the tee, but also increase the weight of the pipe and increase the risk of pipe collapse. Summary of the Invention

[0007] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a tee pipe that can reduce energy loss in the confluence area of ​​the tee pipe, save wear-resistant materials while ensuring wear resistance, and reduce eddy currents and dust deposition.

[0008] According to an embodiment of the present invention, a tee pipe includes: a main pipe having a main channel for medium flow; an inclined branch pipe connected to the peripheral wall of the main pipe and having an inclined channel communicating with the main channel, wherein the angle formed between the flow direction of the inclined channel and the flow direction of the main channel is an acute angle; wherein the inner wall of the main channel has a wear region, the wear region being opposite to the flow direction of the inclined branch pipe, and the wear region being provided with a wear-resistant layer; and a turbulence structure for reducing eddies caused by the fluid flowing in from the inclined branch pipe.

[0009] Furthermore, the turbulence structure is a turbulence block disposed on the inner wall of the main channel. The inclined branch pipe and the turbulence block are adjacent to each other in the flow direction of the main channel and are arranged sequentially along the flow direction of the main channel. The turbulence block is used to reduce the eddies caused by the medium flowing in from the inclined branch pipe.

[0010] Furthermore, the baffle block has two sides, which are opposite to and opposite to the flow direction of the main channel, respectively; the two sides gradually narrow along the height direction of the baffle block.

[0011] Furthermore, both sides are flat surfaces.

[0012] Furthermore, the main pipe includes a main branch diffuser and a main pipe that are connected sequentially along the main channel's communication direction, and the cross-sectional area of ​​the main branch diffuser gradually increases along the flow direction of the main channel.

[0013] Furthermore, the inclined branch pipe includes a main inclined branch pipe and an inclined branch gradually expanding pipe connected sequentially along the flow direction of the inclined channel. The cross-sectional area of ​​the inclined branch gradually expanding pipe gradually increases along the flow direction, and the inclined branch gradually expanding pipe is at least partially connected to the main branch gradually expanding pipe.

[0014] Furthermore, the range of the wear area is as follows:

[0015] Range on the z-axis:

[0016]

[0017] The range on the x-axis is: x≤0;

[0018] Range on the y-axis:

[0019] -tan(γ)·[x-(L2-L)tanα1]≤y≤tan(γ)·[x-(L2-L)tanα1];

[0020] Where x and y satisfy the following relationship:

[0021] The x-axis, y-axis, and Z-axis all pass through the origin O and are perpendicular to each other. The origin O of the coordinate system is the center point of the end face of the inlet end of the main branch diffuser 120. The x-axis and y-axis are located on the end face of the inlet end of the main branch diffuser 120, with the positive half-axis of the x-axis facing the side of the inclined branch 200. The Z-axis coincides with the central axis of the main branch diffuser 120, and the positive half-axis of the Z-axis is set towards the main pipe 130.

[0022] In the formula: R0 is the inner radius of the main branch pipe 110, L is the distance from the common vertex of the inclined branch diffuser pipe 220 to the origin O, R3 is the inner radius of the main pipe 130, γ is the diffusion angle of the inclined branch diffuser pipe 220, σ is the diffusion angle of the main branch diffuser pipe 120, α1 is the angle between the inclined branch pipe 200 and the main pipe 100, and L2 is the length of the main branch diffuser pipe 120.

[0023] Furthermore, the end face of the inclined branch diverging pipe facing away from the main inclined branch pipe is connected to one half of the end face of the main pipe facing the main branch diverging pipe, and the other half of the end face of the main pipe facing the main branch diverging pipe is connected to the main branch diverging pipe.

[0024] Furthermore, the wear region includes a high wear rate region and a medium wear rate region, and the wear-resistant layer includes a high wear-resistant layer disposed in the high wear rate region and a medium wear-resistant layer disposed in the medium wear rate region.

[0025] This invention has the following beneficial effects: A dust-laden airflow can flow into the inlet of the main channel, and together with another dust-laden airflow flowing in through the inclined branch pipe, the two airflows can be merged into one and introduced into a single dust removal device for purification, reducing the number of dust removal devices and lowering costs. By setting the angle between the flow direction of the inclined channel and the flow direction of the main channel to an acute angle, the general direction of the inclined channel is aligned with the main channel, avoiding large-angle convergence of the two airflows, thereby reducing energy loss in the airflow convergence area, reducing resistance in the airflow convergence area, and reducing the energy consumption of the fan; and with the inclined branch pipe… The areas with opposite flow directions (i.e., the wear areas within the main channel) are most susceptible to wear and tear from the airflow and dust in the inclined branch pipes. Targeting these wear areas with wear-resistant layers ensures the pipe's wear resistance and lifespan while conserving wear-resistant materials. Furthermore, the wear-resistant layer can be made from materials with superior wear resistance, further enhancing its performance. The turbulence structure reduces eddies caused by the fluid flowing into the inclined branch pipes, minimizing energy loss and airflow resistance. It also reduces or eliminates low-speed areas caused by eddies, preventing dust accumulation in these areas and lowering the risk of pipe collapse due to dust buildup.

[0026] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0027] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0028] Figure 1a This is a schematic diagram of the longitudinal section of the tee pipe of the present invention;

[0029] Figure 1b yes Figure 1a A schematic diagram of the coordinate system and dimension annotations from a given perspective;

[0030] Figure 2 yes Figure 1a View from direction A;

[0031] Figure 3a This is an energy dissipation distribution diagram of the longitudinal section of the tee pipe in Embodiment 1 of the present invention;

[0032] Figure 3b The energy dissipation distribution diagram of the longitudinal section of the conventional tee pipe in Example 2 is shown for comparison.

[0033] Figure 4a This is a velocity distribution diagram of the tee pipe in Embodiment 1 of the present invention;

[0034] Figure 4b For comparison, see the velocity distribution diagram of the conventional tee pipe in Example 2;

[0035] Figure 5 This is a wear rate distribution cloud map of the tee pipe in Embodiment 1 of the present invention.

[0036] Figure label:

[0037] Main pipe 100, main channel 101, main branch pipe 110, main branch diffuser 120, main pipe 130, turbulence block 140, side 141, high wear-resistant layer 150, medium wear-resistant layer 160;

[0038] Inclined branch pipe 200, inclined channel 201, main inclined branch pipe 210, inclined branch expanding pipe 220. Detailed Implementation

[0039] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0041] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0042] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0043] Reference Figures 1a to 2 An embodiment of the present invention provides a three-way pipe, comprising a main pipe 100, an inclined branch pipe 200, and a flow-turbing structure. The main pipe 100 has a main channel 101 for the flow of fluid (such as dust-laden airflow). The inclined branch pipe 200 is connected to the peripheral wall of the main pipe 100 and has an inclined channel 201 communicating with the main channel 101. The angle formed between the flow direction of the inclined channel 201 and the flow direction of the main channel 101 is an acute angle, i.e., the angle between the central axis of the main pipe 100 and the central axis of the inclined branch pipe 200 is an acute angle. This acute angle causes the flow direction of the inclined channel 201 to have a downstream component (same as the flow direction of the main channel 101) and a vertical component (perpendicular to the flow direction of the main channel 101). The downstream component creates resistance to the airflow within the pipe. With smaller eddies, the flow direction of the inclined channel 201 can be understood as the extension direction of the inclined channel 201, and the flow direction of the main channel 101 can be understood as the extension direction of the main channel 101, i.e., the central axis of the main pipe 100; the inner wall of the main channel 101 has a wear area, which is opposite to the flow direction of the inclined branch pipe 200, and the wear area is provided with a wear-resistant layer; the turbulence structure is used to reduce the eddies caused by the fluid flowing in from the inclined branch pipe 200, thereby reducing the energy loss and airflow resistance of the airflow convergence, reducing or even eliminating the low-speed area caused by the eddies, so that dust does not accumulate in the low-speed area of ​​the eddies, and reducing the risk of pipe collapse caused by dust accumulation.

[0044] The main channel of this invention can receive a dust-laden airflow at its inlet, which, together with another dust-laden airflow from the inclined branch pipe, can merge the two airflows into one and introduce them into a dust removal device for purification. This reduces the number of dust removal devices and lowers costs. By setting the angle between the flow direction of the inclined channel and the flow direction of the main channel to an acute angle, the general direction of the inclined channel is consistent with the main channel, avoiding large-angle convergence of the two airflows, thereby reducing energy loss and resistance in the airflow convergence area. The area opposite to the flow direction of the inclined branch pipe (i.e., the wear area) is the area most susceptible to wear from the dust impact of the airflow from the inclined branch pipe. A wear-resistant layer is specifically designed for the wear area, thereby saving wear-resistant materials while ensuring the wear resistance and lifespan of the pipeline. Furthermore, the wear-resistant layer can be made of materials with good wear resistance to further enhance wear resistance. The turbulence structure reduces eddies caused by the fluid flowing in from the inclined branch pipe, reducing energy loss and airflow resistance, and reducing or even eliminating low-speed areas caused by eddies. This prevents dust from accumulating in the low-speed areas of eddies, reducing the risk of pipeline collapse due to dust accumulation.

[0045] Optionally, in this invention, the turbulence structure is a turbulence block 140 disposed on the inner wall of the main channel 101. The inclined branch pipe 200 and the turbulence block 140 are adjacent to each other in the flow direction of the main channel 101 and are arranged sequentially along the flow direction of the main channel 101. The inclined branch pipe 200 and the turbulence block 140 being adjacent in the flow direction of the main channel 101 means that the inclined branch pipe 200 and the turbulence block 140 are arranged in the flow direction of the main channel 101, and the side of the turbulence block 140 near the inclined branch pipe 200 and the side of the inclined branch pipe 200 near the turbulence block 140 are in contact or separated by a predetermined distance. The turbulence block 140 is located in the leeward zone, that is, the turbulence block 140 is located on the side of the airflow path of the inclined branch pipe 200 that is opposite to the airflow direction of the main channel 101. The turbulence block 140 is used to reduce the eddies caused by the medium flowing in from the inclined branch pipe 200.

[0046] More preferably, in this invention, the turbulence block 140 and the wear-resistant layer are disposed opposite to each other on the side wall of the main channel 101, and the turbulence block 140 and the wear-resistant layer are not in contact, but have a gap. Specifically, in the cross-section of the main channel 101, the wear-resistant layer (high wear-resistant layer 150, medium wear-resistant layer 160) covers half of the inner wall of the main channel 101. This design can fully cover the wear-prone area, save materials and facilitate installation; in the cross-section of the main channel 101, the turbulence block 140 covers 1 / 4 of the inner wall of the main channel 101, which has the best effect in reducing eddies.

[0047] Optionally, in this invention, the turbulence block 140 has two sides 141, which are opposite to and opposite to the flow direction of the main channel 101, respectively. The two sides 141 gradually narrow along the height direction of the turbulence block 140. The narrowing of the two sides 141 reduces the obstruction of the airflow blowing towards the sides 141, reduces energy loss and turbulence, and thus reduces airflow resistance.

[0048] Optionally, in this invention, the two side surfaces 141 are flat surfaces. Flat surfaces are easy to process and can better guide airflow, reducing airflow resistance.

[0049] Of course, in other embodiments of the present invention, the side surface 141 can be curved, which can also reduce the obstruction of airflow and guide the airflow and reduce airflow resistance.

[0050] Optionally, in this invention, the main pipe 100 includes a main branch pipe 110, a main branch diffuser pipe 120, and a main pipe 130 connected sequentially along the communication direction of the main channel 101. The main channel 101 is defined by the main branch pipe 110, the main branch diffuser pipe 120, and the main pipe 130. The cross-sectional area of ​​the main branch diffuser pipe 120 gradually increases along the flow direction of the main channel 101. One end of the main branch diffuser pipe 120 connected to the main branch pipe 110 has the same inner diameter as the main branch pipe 110, and the other end has the same inner diameter as the main pipe 130, thus avoiding increased wind resistance and energy loss due to end difference. As the cross-sectional area of ​​the main branch diffuser 120 gradually increases along the airflow direction, that is, the flow area of ​​the main branch diffuser 120 gradually increases with the airflow direction, the airflow velocity gradually slows down when passing through the main branch diffuser 120, making the convergence with the airflow of the inclined branch 200 more gentle, avoiding the airflow velocity in the main branch diffuser 120 being too fast and causing a large and intense convergence with the airflow of the inclined branch 200, thus resulting in a large energy loss.

[0051] Optionally, in this invention, the angle formed between the flow direction of the inclined channel 201 and the flow direction of the main channel 101 is in the range of 30° to 60°, such as 30°, 45° and 60°, which can be selected as needed.

[0052] Optionally, in this invention, the inclined branch pipe 200 includes a main inclined branch pipe 210 and an inclined branch diffuser pipe 220 connected sequentially along the flow direction of the inclined channel 201. The cross-sectional area of ​​the inclined branch diffuser pipe 220 gradually increases along the flow direction, that is, the flow area of ​​the inclined branch diffuser pipe 220 gradually increases with the airflow direction. When the airflow passes through the inclined branch diffuser pipe 220, the flow velocity gradually slows down, so that when they converge in the main channel 101, they avoid violent convergence, reduce energy loss and airflow resistance, and reduce the energy consumption of the fan. The inclined branch diffuser pipe 220 is at least partially connected to the main branch diffuser pipe 120, that is, the convergence area is within or near the main branch diffuser pipe 120. The two airflows, after being slowed down, converge in the area near the main branch diffuser 120, which avoids: strong airflow collisions that would generate local high pressure and large energy exchange, as well as the generation of a large number of eddies in the confluence area, which would increase the local drag coefficient at the confluence point, increase the resistance of the dust removal system, and thus increase the energy consumption of the fan.

[0053] Optionally, in this invention, the end face of the inclined branch diffuser 220 facing away from the main inclined branch 210 is connected to one half of the end face of the main pipe 130 facing the main branch diffuser 120, and the other half of the end face of the main pipe 130 facing the main branch diffuser 120 is connected to the main branch diffuser 120. Specifically, the circumferential wall surfaces of the inclined branch diffuser 220 and the main branch diffuser 120 intersect, and the intersection line of the connection between the inclined branch diffuser 220 and the main branch diffuser 120 is horseshoe-shaped, so that the end face of the inclined branch diffuser 220 facing the main pipe 130 and the end face of the main branch diffuser 120 facing the main pipe 130 are two semi-circular rings, which are spliced ​​to form a complete annular surface that matches the end face of the main pipe 130 facing the main branch diffuser 120. By directly connecting the inclined branch diffuser 220 to a portion of the end face of the main pipe 130, the convergence area of ​​the main branch diffuser 120 and the inclined branch diffuser 220 is brought as close as possible to the main pipe 130. The main pipe 130 has a larger flow area, and the closer the two airflows are to the main pipe 130 for convergence, the lower the convergence velocity, reducing collisions and energy loss. In addition, the closer the inclined branch diffuser 220 is to the main pipe 130, the further the wear area opposite the inclined branch diffuser 220 will be from the main branch diffuser 120. This allows for the installation of a wear-resistant layer only on the inner wall of the main pipe 130, instead of the main branch diffuser 120. Since the main branch diffuser 120 has a conical surface, it is difficult to install a wear-resistant layer. It is easier to process the wear-resistant layer on the main pipe 130.

[0054] More preferably, both the baffle 140 and the wear-resistant layer are connected to the inner wall of the main pipe 130. The inner wall of the main pipe 130 is easier to install the baffle 140 and the wear-resistant layer compared to the inner wall of the main branch diffuser 120. More preferably, the height of the baffle 140 is half the difference between the diameter of the main pipe 130 and the diameter of the main branch pipe 110, so as to avoid the baffle 140 being too high and thus significantly obstructing the airflow flowing into the main branch pipe 110, and also to avoid the baffle 140 being too low and thus affecting its baffle effect.

[0055] Of course, in other embodiments, the end of the inclined branch dimmer pipe 220 facing away from the main inclined branch pipe 210 can also be completely connected to the main branch dimmer pipe 120, and the entire end face of the main pipe 130 is connected to the entire end face of the main branch dimmer pipe 120, thereby realizing the pipe connection of the tee pipe.

[0056] Optionally, in this invention, the wear area range is as follows:

[0057] Range on the z-axis:

[0058]

[0059] The range on the x-axis is: x≤0;

[0060] Range on the y-axis:

[0061] -tan(γ)·[x-(L2-L)tanα1]≤y≤tan(γ)·[x-(L2-L)tanα1];

[0062] Where x and y satisfy the following relationship:

[0063] The x-axis, y-axis, and Z-axis all pass through the origin O and are perpendicular to each other. The origin O of the coordinate system is the center point of the end face of the inlet end of the main branch diffuser 120, that is, the center point of the end face where the main branch diffuser 120 intersects with the main branch pipe 110. The x-axis and y-axis are located on the end face of the inlet end of the main branch diffuser 120, that is, the x-axis and y-axis are straight lines in the radial direction of the main branch diffuser 120, and the positive half-axis of the x-axis faces the inclined branch pipe 200. The Z-axis coincides with the central axis of the main branch diffuser 120 and the positive half-axis of the Z-axis is set towards the main pipe 130.

[0064] In the formula: R0 is the inner radius of the main branch pipe 110, L is the distance from the common vertex of the inclined branch diffuser pipe 220 to the origin O, R3 is the inner radius of the main pipe 130, γ is the diffusion angle of the inclined branch diffuser pipe 220, σ is the diffusion angle of the main branch diffuser pipe 120; α1 is the angle between the inclined branch pipe 200 and the main pipe 100, that is, the angle between the central axis of the main pipe 100 and the central axis of the inclined branch pipe 200, and the angle has been defined as acute; L2 is the length of the main branch diffuser pipe 120.

[0065] The peripheral wall of the inclined branch diffuser 220 is a conical surface, and the vertex of the cone containing this conical surface is the common vertex of the inclined branch diffuser 220, i.e., as shown below. Figure 1b As shown, the intersection point G of the extension lines of the two sides of any longitudinal section of the inclined branch diffuser 220 (passing through the central axis of the inclined branch diffuser 220) is the common vertex of its conical surface, and the conical surface can be a circular conical surface.

[0066] Optionally, in this invention, the wear region includes a high wear rate region and a medium wear rate region, and the wear-resistant layer includes a high wear-resistant layer 150 disposed in the high wear rate region and a medium wear-resistant layer 160 disposed in the medium wear rate region. The high wear rate region experiences higher wear than the medium wear rate region, allowing for differentiated design of the high wear-resistant layer 150 and the medium wear-resistant layer 160. The high wear-resistant layer 150 can utilize a material with better wear resistance, ensuring both wear resistance and lifespan without wasting material and saving costs.

[0067] Optionally, in this invention, the high wear-resistant layer 150 is thicker than the medium wear-resistant layer 160, thereby further enhancing the wear resistance life of the high wear-resistant layer 150.

[0068] Understandably, during tee pipe transport, the two airflows entering from the main branch pipe 110 and the main inclined branch pipe 210 converge, generating vortices, causing localized dust accumulation, energy loss, and increased resistance. Furthermore, the dust in the airflow entering from the main inclined branch pipe 210 can cause impact abrasion to the pipe wall. Therefore, the main branch diffuser 120 decelerates the airflow entering from the main branch pipe 110, and the inclined branch diffuser 220 decelerates the airflow entering from the main inclined branch pipe 210. This allows the two decelerated airflows to converge in the area near the main branch diffuser 120, preventing strong airflow collisions that could generate localized high pressure and significant energy exchange, thus increasing the local resistance coefficient at the confluence point. The turbulence block 140 occupies the leeward area of ​​the airflow entering from the inclined branch pipe 200, thereby reducing vortices and dust accumulation in that area. Dust accumulation is reduced, and the shape (two converging sides 141) and size (the height of the baffle 140 is half the difference between the diameter of the main pipe 130 and the diameter of the main branch pipe 110) of the baffle 140 are further optimized to ensure the reduction of eddies while avoiding significant airflow resistance. Furthermore, by setting up wear zones and wear-resistant layers, wear resistance is specifically enhanced in easily worn areas. By further decomposing the wear-resistant areas, a high-wear-resistant layer 150 with good wear resistance and high thickness is set in areas with high wear rates. This improves wear resistance and lifespan while reducing material waste. Through the above multi-dimensional comprehensive improvements, the problems of the tee pipe are comprehensively improved, reducing eddies, energy loss, airflow resistance, and dust accumulation in the tee pipe, reducing the use of wear-resistant materials, and ensuring wear resistance.

[0069] The effects of the embodiments of the present invention will be further explained below with reference to the examples and accompanying drawings.

[0070] Embodiment 1 of the present invention:

[0071] In this embodiment, the inlet velocity of the inclined branch pipe is 16.5 m / s, and the diameter of the main inclined branch pipe 210 is 250 mm; the inlet velocity of the main branch pipe is 16.5 m / s, and the diameter is 290 mm; the inlet front end of the main branch diffuser 120 is connected to a 2 m long main branch pipe 110, the outlet rear end diameter of the main branch diffuser is 390 mm, and the outlet rear end is connected to a 2 m long main pipe 130. All tee pipes are made of Q235A steel with a thickness of 4 mm to 6 mm. In this embodiment, the inclination angle of the two sides of the turbulence block 140 is 20 degrees, the height is 50 mm, the width covers one-quarter of the circumference of the corresponding main channel inner wall, and the length is 360 mm.

[0072] Comparative Example 2 of a Conventional T-Connect Pipe:

[0073] Compared with Example 1, the oblique branch gradually expanding pipe is changed to an oblique straight pipe with a diameter of 250mm. The main pipe has no turbulence block 140 on the same side inner wall as the oblique branch pipe, and the main branch gradually expanding pipe has a gradually expanding angle of 8 degrees.

[0074] Simulation conditions: The particle size is 150 μm, the main branch diffuser angle in both Example 1 and Example 2 is 8 degrees, and the angle between the inclined branch and the main branch (the angle formed between the flow direction of the inclined channel 201 and the flow direction of the main channel 101) is 45 degrees.

[0075] The following analysis examines Example 1 and Comparative Example 2:

[0076] Figure 3a This is an energy dissipation distribution diagram according to an embodiment of the present invention; Figure 3b This is a diagram showing the energy dissipation distribution of a T-junction in existing technology. From... Figure 3a , Figure 3b As can be seen, the embodiment of the present invention uses an inclined branch diffuser to reduce the area of ​​the energy dissipation region at the confluence and shorten the effective length. The use of an inclined branch diffuser 220 in the upper part of the inclined branch reduces the high pressure generated by mutual collision during mixing of the two airflows, thereby reducing energy exchange between the two airflows and effectively weakening the energy loss during mixing within the tee, thus reducing fluid resistance. Furthermore, the turbulence block 140 reduces eddies, further reducing energy loss. Calculations show that the drag reduction rate of Embodiment 1 of the present invention is approximately 30% compared to Comparative Embodiment 2.

[0077] Figure 4a This is a velocity distribution diagram of the airflow inside the pipe in Embodiment 1 of the present invention; Figure 4b To compare the velocity distribution of the airflow inside the duct in Example 2, the following diagram is used. Figure 4bAs can be seen, a large area of ​​low-speed zone exists in the leeward region of the inclined branch pipe relative to the main channel 101, with the lowest velocity reaching only 2 m / s. Dust accumulates heavily in this low-speed zone, increasing airflow turbulence and pipe resistance. Furthermore, excessive dust accumulation increases pipe weight, and in severe cases, can lead to pipe collapse. Figure 4a As can be seen, in Embodiment 1 of the present invention, by providing a protrusion structure (turbulence block 140) on the inner wall of the main pipe 130 on the same side as the inclined branch pipe 200, the range of the leeward zone is only 20% of that in Comparative Embodiment 2, and the minimum flow velocity in the leeward zone is also increased to 6 m / s, which significantly reduces the range and intensity of the eddies and reduces the risk of dust deposition in the area.

[0078] Figure 5 The image shows a wear rate distribution cloud map of the tee pipe in Embodiment 1 of the present invention. As can be seen from the image, the wear area of ​​the tee pipe is mainly distributed on the inner wall surface of the main pipe 130 opposite to the inclined branch pipe 200, while other areas show virtually no wear. The wear rate on the inner wall surface of the main pipe opposite to the inclined branch pipe is also not uniform; two areas show high wear rates (high wear rate areas), the area between the two high wear rate areas is a medium wear rate area, and the rest are low wear rate areas.

[0079] Compared with existing technologies, this patent has the following advantages:

[0080] 1. Both the main branch diffuser 120 and the oblique branch diffuser 220 are composed of continuously expanding reducers. After the main branch diffuser 120 and the oblique branch diffuser 220 merge, they each occupy a semicircle on the cross section of the main pipe 130. The oblique branch diffuser 220 can reduce the high pressure generated by the collision between the two airflows when they mix, thereby reducing the energy exchange between the two airflows and effectively weakening the energy loss when the two fluids mix in the tee pipe, thus reducing fluid resistance.

[0081] 2. The inner wall surface opposite the inclined branch of the tee (i.e., the wear area of ​​the main channel 101) is coated with different wear-resistant materials according to different wear rates. For the high wear-resistant layer 150 in the high wear-rate area, high-wear-resistant Al2O3 wear-resistant ceramic with good wear resistance and high price is used, and the thickness of the wear-resistant material in the high wear-resistant layer 150 is increased by 30% to better protect the outer wall of the pipe in this area from being worn through. For the medium wear-rate area, the medium wear-resistant layer 160 is made of wear-resistant alloy steel with slightly lower wear resistance and price. For the low wear-rate area, no wear-resistant material is required. The wear-resistant layer is applied to the inner wall surface of the main pipe 130 opposite the inclined branch and covers a 180° area of ​​the inner wall surface of the main pipe 130. This design increases the wear life of the tee pipe and reduces the amount of wear-resistant material used, thereby reducing costs.

[0082] 3. When the inclined branch pipe merges into the main pipe, it forms a vortex zone in its leeward area. The velocity in the vortex zone decreases, and dust in the dust collection pipe will settle in the low-speed zone. In order to reduce dust deposition in the vortex zone, this patent sets a protrusion (turbulence block 140) with a shape similar to the vortex zone in the vortex zone. This protrusion occupies the position of the vortex zone, so that the airflow of the inclined branch pipe does not generate a vortex zone when merging into the main pipe. Thus, there is no low-speed zone in the tee pipe, which can prevent dust from accumulating in this area and reduce the risk of pipe collapse caused by dust accumulation.

[0083] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A tee pipe, characterized in that... include: Supervisor (100), with main channel (101); An inclined branch pipe (200) is connected to the peripheral wall of the main pipe (100) and has an inclined channel (201) communicating with the main channel (101), and the angle formed between the flow direction of the inclined channel (201) and the flow direction of the main channel (101) is an acute angle. The inner wall of the main channel (101) has a wear area, which is opposite to the flow direction of the inclined branch pipe (200), and the wear area is provided with a wear-resistant layer; A turbulence-reducing structure is used to reduce eddies caused by the fluid flowing in from the inclined branch pipe (200); A dust-laden airflow can flow into the inlet of the main channel, and together with a dust-laden airflow flowing into the inclined branch pipe, the two dust-laden airflows can be merged into one. The main pipe (100) includes a main branch pipe (110), a main branch expanding pipe (120) and a main pipe (130) connected sequentially along the communication direction of the main channel (101); The inclined branch pipe (200) includes a main inclined branch pipe (210) and an inclined branch diffuser pipe (220) connected sequentially along the flow direction of the inclined channel (201), and the inclined branch diffuser pipe (220) is at least partially connected to the main branch diffuser pipe (120). The end face of the inclined branch diverging pipe (220) facing away from the main inclined branch pipe (210) is connected to one half of the end face of the main pipe (130) facing the main branch diverging pipe (120), and the other half of the end face of the main pipe (130) facing the main branch diverging pipe (120) is connected to the main branch diverging pipe (120). The wear area range is as follows: Range on the z-axis: The range on the x-axis is: x≤0; Range on the y-axis: -tan(γ)·[x-(L2-L)tanα1]≤y≤tan(γ)·[x-(L2-L)tanα1]; Where x and y satisfy the following relationship: The x-axis, y-axis, and Z-axis all pass through the origin O and are perpendicular to each other. The origin O of the coordinate system is the center point of the end face of the inlet end of the main branch diffuser (120). The x-axis and y-axis are located on the end face of the inlet end of the main branch diffuser (120), and the positive half-axis of the x-axis faces the inclined branch pipe (200). The Z-axis coincides with the central axis of the main branch diffuser (120), and the positive half-axis of the Z-axis is set towards the main pipe (130). In the formula: R0 is the inner radius of the main branch pipe (110), L is the distance from the common vertex of the inclined branch diffuser pipe (220) to the origin O, R3 is the inner radius of the main pipe (130), γ is the diffusion angle of the inclined branch diffuser pipe (220), σ is the diffusion angle of the main branch diffuser pipe (120), α1 is the angle between the inclined branch pipe (200) and the main pipe (100), and L2 is the length of the main branch diffuser pipe (120).

2. The tee pipe according to claim 1, characterized in that: The turbulence structure is a turbulence block (140) disposed on the inner wall of the main channel (101). The inclined branch pipe (200) and the turbulence block (140) are adjacent to each other in the flow direction of the main channel (101) and are arranged sequentially along the flow direction of the main channel (101).

3. The tee pipe according to claim 2, characterized in that: The turbulence block (140) has two sides (141), which are opposite to and opposite to the flow direction of the main channel (101), respectively; the two sides (141) gradually narrow along the height direction of the turbulence block (140).

4. The tee pipe according to claim 3, characterized in that: The two sides (141) are flat surfaces.

5. The tee pipe according to any one of claims 1 to 4, characterized in that: The cross-sectional area of ​​the main branch diffuser (120) gradually increases along the flow direction of the main channel (101).

6. The tee pipe according to claim 5, characterized in that: The cross-sectional area of ​​the inclined branch expanding tube (220) gradually increases along the flow direction.

7. The tee pipe according to claim 1, characterized in that: The wear region includes a high wear rate region and a medium wear rate region, and the wear-resistant layer includes a high wear-resistant layer (150) disposed in the high wear rate region and a medium wear-resistant layer (160) disposed in the medium wear rate region.

8. The tee pipe according to claim 7, characterized in that: The high wear-resistant layer (150) is thicker than the medium wear-resistant layer (160).

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