CN115507241A - Three-way pipe - Google Patents

Abstract

The invention discloses a three-way pipe, which comprises a main pipe and an inclined branch pipe; the main pipe has a main channel for medium circulation; The angle formed with the flow direction of the main channel is an acute angle; the inner wall of the main channel has a wear area, which is opposite to the flow direction of the inclined branch pipe, and the wear area is provided with a wear-resistant layer; the main pipe is provided with a spoiler structure. According to the present invention, a wear-resistant layer is provided on the wear area, thereby saving wear-resistant materials while ensuring the wear-resistant performance and service life of the pipeline, and the wear-resistant layer can be targetedly made of materials with good wear-resistant performance; the spoiler structure Reduce the vortex caused by the fluid flowing into the inclined branch pipe, reduce or even eliminate the low-velocity area caused by the vortex, so that dust will not deposit in the low-velocity area of the vortex, and reduce the risk of pipeline collapse due to dust deposition.

Description

a three-way pipe

technical field

The invention relates to the field of communication pipelines, in particular to a tee pipe.

Background technique

At present, in fluid pipeline equipment, a three-way pipe is often used for collecting fluid.

For example, in the ventilation and dust removal system, the power generated by the fan is used to send the dust-laden gas into the dust removal equipment through the dust removal pipe for purification, and then the purified gas is discharged from the exhaust pipe, so as to achieve the purpose of purifying the air environment. The three-way pipe is widely used as an important part of the ventilation and dust removal system. The three-way pipe can be used to combine two dusty airflows into one, and finally introduce the dusty airflow of the system into a set of dust removal equipment for purification. Therefore, the use of tees can reduce the number of dust removal equipment and reduce the initial investment of the project. At present, the three-way pipe in the ventilation and dust removal system mainly has the following deficiencies:

1. When the branch airflow of the three-way pipe is mixed into the main pipe, it will strongly collide with the airflow of the main branch pipe to generate local high pressure, and generate a large energy exchange, and generate a large number of eddy currents in the confluence area, resulting in an increase in the local resistance coefficient at the confluence. Large, the resistance loss of the dust removal system increases, which increases the energy consumption of the fan.

2. The dust in the ventilation and dust removal system will cause erosion and wear to the pipes. In order to prevent the pipes from being worn out, most of them adopt indiscriminate wear-resistant treatment for the three-way pipe and the outlet pipe of the three-way, and the three-way pipe is easy to wear The wearing part is only a small part of it, so the indiscriminate wear-resistant method not only cannot protect the easy-wear parts of the tee well, but also wastes wear-resistant materials.

3. When the three-way inclined branch pipe merges into the main pipe, it will form a vortex area in its leeward area. The speed in the vortex area will decrease, and the dust in the dust removal pipe will deposit in the low-speed area. After a period of time, the vortex area will A thick layer of dust is deposited. 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.

Contents of the invention

The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the present invention proposes a tee pipe, which 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.

A tee pipe according to an embodiment of the present invention includes: a main pipe with a main passage for medium circulation; an oblique branch pipe connected to the peripheral wall of the main pipe and having an oblique passage communicated with the main passage, and the circulation of the oblique passage The angle formed between the direction and the flow direction of the main channel is an acute angle; wherein the inner wall of the main channel has a wear area, the wear area is opposite to the flow direction of the inclined branch pipe, and the wear area is provided with a wear-resistant layer; The structure is used to reduce the vortex caused by the fluid flowing in from the inclined branch pipe.

Further, the spoiler structure is a spoiler block arranged on the inner wall of the main channel, and the oblique branch pipe is adjacent to the spoiler block in the flow direction of the main channel and arranged in sequence along the flow direction of the main channel. The spoiler is used to reduce the eddy current caused by the medium flowing into the inclined branch pipe.

Further, the spoiler has two sides, and the two sides are respectively opposite and opposite to the flow direction of the main channel; the two sides are gradually narrowed along the height direction of the spoiler.

Further, the two side surfaces are flat surfaces.

Further, the main pipe includes a main branch expander and a main pipe which are connected in sequence along the communication direction of the main channel, and the cross-sectional area of the main branch expander gradually increases along the flow direction of the main channel.

Further, the oblique branch pipe includes a main oblique branch pipe and an oblique branch expanding pipe successively connected along the flow direction of the oblique channel, the cross-sectional area of the oblique branch expanding pipe gradually increases along the flow direction, and the oblique branch gradually expands. The expansion tube is at least partially connected to the main branch expander.

Further, the scope of the wear area is as follows:

Range on the z axis:

Range on the x-axis: x≤0;

Range on the y-axis:

-tan(γ)·[x-(L ₂ -L)tanα ₁ ]≤y≤tan(γ)·[x-(L ₂ -L)tanα ₁ ];

Where x and y satisfy the relationship:

The x-axis, y-axis and Z-axis all pass through the origin O and are perpendicular to each other. The origin of the coordinate system O is the center point of the end face of the main branch expanding pipe 120 inlet end, and the x-axis and y-axis are located at the end face of the main branch expanding pipe 120 inlet end. , and the positive semi-axis of the x-axis faces the side of the inclined branch pipe 200, the Z-axis coincides with the central axis of the main branch expanding pipe 120 and the positive semi-axis of the Z-axis faces the main pipe 130;

In the formula: R ₀ is the inner radius of the main branch pipe 110, L is the distance from the common vertex of the inclined branch expanding pipe 220 to the origin O, R ₃ is the inner radius of the main pipe 130, and γ is the gradual expansion of the inclined branch expanding pipe 220 angle, σ is the diverging angle of the main branch expander 120, α ₁ is the angle between the oblique branch 200 and the main pipe 100, and L ₂ is the length of the main branch expander 120.

Further, the end surface of the inclined branch diverging pipe facing away from the main oblique branch pipe is connected to one half of the end surface of the main pipe facing the main branch expanding pipe, and the other end surface of the main pipe facing the one end of the main branch expanding pipe is Half of it is connected with the main branch expander.

Further, the wear area includes a high wear rate area and a medium wear rate area, and the wear-resistant layer includes a high wear-resistant layer located in the high wear rate area and a medium wear-resistant layer located in the medium wear rate area.

The present invention has the following beneficial effects: the inlet end of the main channel of the present invention can flow into a dust-laden airflow, plus a dust-laden airflow flowing in from the inclined branch pipe, the two dust-laden airflows can be combined into one, and together Introducing a set of dust removal equipment for purification can reduce the number of dust removal equipment and reduce costs; by setting the angle between the flow direction of the inclined channel and the flow direction of the main channel as an acute angle, the general direction of the inclined channel is the same as that of the main channel. The main channel is consistent, avoiding the intersection of two airflows at a large angle, thereby reducing the energy loss in the airflow confluence area, reducing the resistance in the airflow confluence area, and reducing the energy consumption of the fan; the area opposite to the flow direction of the inclined branch pipe (that is, in the main channel) The wear area) is the area that is most likely to be impacted and worn by the airflow dust of the inclined branch pipe. The wear-resistant layer is set on the wear area so as to save wear-resistant materials while ensuring the wear resistance and service life of the pipeline, and can be targeted The wear-resistant layer is made of good wear-resistant materials to further enhance the wear-resistant performance; the turbulence structure reduces the eddy current caused by the fluid flowing into the inclined branch pipe, reduces energy loss and airflow resistance, and reduces or even eliminates the low-speed flow caused by the eddy current. Area, so that dust is not deposited in the low-velocity area of the vortex, reducing the risk of pipe collapse due to dust deposition.

In addition to the objects, features and advantages described above, the present invention has other objects, features and advantages. Hereinafter, the present invention will be described in further detail with reference to the drawings.

Description of drawings

The accompanying drawings constituting a part of this application are used to provide further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention, and do not constitute an improper limitation of the present invention. In the attached picture:

Fig. 1 a is the schematic diagram of the longitudinal section of the tee pipe of the present invention;

Figure 1b is a schematic diagram of the coordinate system and dimensioning from the perspective of Figure 1a;

Fig. 2 is the A direction view of Fig. 1a;

Fig. 3 a is the energy dissipation distribution diagram of the longitudinal section of the tee pipe of embodiment 1 of the present invention;

Fig. 3 b is the energy dissipation distribution diagram of the longitudinal section of the conventional tee pipe of comparative example 2;

Fig. 4 a is the velocity profile of embodiment 1 tee pipe of the present invention;

Fig. 4 b is the velocity distribution diagram of the conventional tee pipe of comparative example 2;

Fig. 5 is a nephogram of the wear rate distribution of the tee pipe in Example 1 of the present invention.

Reference signs:

Main pipe 100, main channel 101, main branch pipe 110, main branch expanding pipe 120, main pipe 130, spoiler block 140, side surface 141, high wear-resistant layer 150, medium wear-resistant layer 160;

Inclined branch pipe 200 , inclined channel 201 , main inclined branch pipe 210 , and oblique branch expanding pipe 220 .

detailed description

It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relationship between the components in a certain posture (as shown in the accompanying drawings). Relative positional relationship, movement conditions, etc., if the specific posture changes, the directional indication also changes accordingly.

In addition, the descriptions involving "first", "second" and so on in the present invention are only for descriptive purposes, and should not be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In addition, the technical solutions of the various embodiments can be combined with each other, but it must be based on the realization of those skilled in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist , nor within the scope of protection required by the present invention.

Referring to Fig. 1a to Fig. 2, a tee pipe according to an embodiment of the present invention includes a main pipe 100, an inclined branch pipe 200 and a turbulence structure. The main pipe 100 has a main passage 101, and the main passage 101 is used for fluid (such as air with dust) to circulate; the oblique branch pipe 200 is connected to the peripheral wall of the main pipe 100, and has an oblique passage 201 communicating with the main passage 101, and the flow direction of the oblique passage 201 The included angle formed between the flow direction of the main channel 101 is an acute angle, that is, the included angle between the central axis of the main pipe 100 and the central axis of the inclined branch pipe 200 is an acute angle, and the included angle is an acute angle so that the flow direction of the inclined channel 201 has the same angle as the main channel. The flow direction of the channel 101 is the same as the forward flow component and the vertical component perpendicular to the flow direction of the main channel 101. The flow direction of the flow direction of the inclined channel 201 can be understood as an inclined channel. The extension direction of 201, the flow direction of the main passage 101 can be understood as the extension direction of the main passage 101, that is, the central axis of the main pipe 100; wherein the inner wall of the main passage 101 has a wear area, the wear area is opposite to the flow direction of the inclined branch pipe 200, and the wear area There is a wear-resistant layer; the turbulence structure is used to reduce the eddy current caused by the fluid flowing in from the inclined branch pipe 200, thereby reducing the energy loss and airflow resistance of the air flow intersection, reducing or even eliminating the low-speed area caused by the eddy current, so that the dust is not in the low-speed vortex. Area deposition, reducing the risk of pipe collapse due to dust deposits.

The inlet end of the main channel of the present invention can flow into a dust-laden airflow, coupled with a dust-laden airflow flowing in from the inclined branch pipe, the two dust-laden airflows can be combined into one, and introduced together to a set of dust removal equipment for dedusting. Purification can reduce the number of dust removal equipment and reduce costs; by setting the angle between the flow direction of the inclined channel and the flow direction of the main channel as an acute angle, the general direction of the inclined channel is consistent with the main channel, avoiding two large airflows The intersection of angles, thereby reducing the energy loss in the confluence area of the airflow, and reducing the resistance in the confluence area of the airflow; the area opposite to the flow direction of the inclined branch pipe (that is, the wear area) is the most susceptible to the impact and wear of the airflow dust of the inclined branch pipe. The wear-resistant layer is set up in a targeted manner, so as to ensure the wear-resistant performance and service life of the pipeline, while saving wear-resistant materials, and the wear-resistant layer can be targeted to use materials with good wear resistance to further enhance the wear-resistant performance. The flow structure reduces the vortex caused by the fluid flowing into the inclined branch pipe, reduces energy loss and airflow resistance, reduces or even eliminates the low-velocity area caused by the eddy current, prevents dust from depositing in the low-velocity area of the vortex, and reduces the risk of pipeline collapse due to dust deposition .

Optionally, in the present invention, the spoiler structure is a spoiler block 140 arranged on the inner wall of the main channel 101, and the inclined branch pipe 200 and the spoiler block 140 are adjacent to and along the flow direction of the main channel 101 Set in turn. The inclined branch pipe 200 and the spoiler block 140 are adjacent in the flow direction of the main channel 101, which means that the inclined branch pipe 200 and the spoiler block 140 are arranged in the flow direction of the main channel 101, and the spoiler block 140 is close to the inclined branch pipe 200. One side of the inclined branch pipe 200 is in contact with or separated from the side of the spoiler block 140 by a preset distance, and the spoiler block 140 is in the leeward area, that is, the spoiler block 140 is located in the airflow path of the inclined branch pipe 200 and is opposite to the airflow direction of the main channel 101 On one side, the spoiler block 140 is used to reduce the eddy flow caused by the medium flowing in from the inclined branch pipe 200 .

More preferably, in the present invention, the spoiler block 140 and the wear-resistant layer are disposed opposite to each other on the side wall of the main channel 101 , and the spoiler block 140 is not in contact with the wear-resistant layer, and there is a distance therebetween. Specifically, on the cross-section of the main channel 101, the wear-resistant layer (high wear-resistant layer 150, medium wear-resistant layer 160) covers the inner wall of the main channel 101 half of the circumference, so that the design can fully cover the wear-prone area and save materials. It is also convenient for installation; on the cross section of the main passage 101, the spoiler 140 covers the inner wall of 1/4 of the circumference of the main passage 101, and the effect of reducing eddy current is the best.

Optionally, in the present invention, the spoiler block 140 has two side faces 141, and the two side faces 141 are opposite and opposite to the flow direction of the main channel 101 respectively; the two side faces 141 are gradually narrowed along the height direction of the spoiler block 140 , the two sides 141 are narrowed, so that the resistance of the two sides 141 to the airflow blowing towards the side 141 is weakened, energy loss and turbulent flow are reduced, thereby reducing airflow resistance.

Optionally, in the present invention, the two side surfaces 141 are flat surfaces, which are easy to process, and can better guide the airflow and reduce airflow resistance.

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

Optionally, in the present invention, the main pipe 100 includes a main branch pipe 110, a main branch diverging pipe 120 and a main pipe 130 connected in sequence along the communication direction of the main passage 101, and the main passage 101 is composed of the main branch pipe 110, the main branch diverging pipe 120 and the main branch pipe 120. The manifold 130 is defined. The cross-sectional area of the main branch expanding pipe 120 gradually increases along the flow direction of the main channel 101. One end of the main branch expanding pipe 120 connected to the main branch pipe 110 is the same as the inner diameter of the main branch pipe 110, and the other end is the same as the inner diameter of the main pipe 130 to avoid End difference causes wind resistance increase and energy loss. Since the cross-sectional area of the main branch expanding pipe 120 gradually increases along the airflow direction, that is, the flow area of the main branch expanding pipe 120 gradually increases with the airflow direction, and when the airflow passes through the main branch expanding pipe 120, the flow velocity gradually slows down. It makes the air flow with the inclined branch pipe 200 more gentle, and prevents the air flow flowing in from the main divergent pipe 120 from being too fast to meet with the air flow in the inclined branch pipe 200 so as to cause greater energy loss.

Optionally, in the present invention, the included angle between the flow direction of the inclined channel 201 and the flow direction of the main channel 101 ranges from 30° to 60°, such as 30°, 45° and 60°, which can be selected according to needs .

Optionally, in the present invention, the oblique branch pipe 200 includes a main oblique branch pipe 210 and an oblique branch expanding pipe 220 connected in sequence along the flow direction of the inclined channel 201, and the cross-sectional area of the oblique branch expanding pipe 220 gradually increases along the flow direction , that is, the flow area of the oblique branch diverging pipe 220 gradually increases with the direction of the airflow, and when the airflow passes through the oblique branch diverging pipe 220, the flow velocity gradually slows down, so that when the subsequent intersection in the main channel 101, intense intersection is avoided and energy loss is reduced and airflow resistance, reducing fan energy consumption. The oblique branch expander 220 is at least partially connected to the main branch expander 120 , that is, the intersection area is within the main branch expander 120 or within a range near the main branch expander 120 . The two decelerated airflows meet in the area near the main branch expander 120, which avoids the strong impact of the airflows to generate local high pressure and large energy exchange, resulting in a large number of eddy currents in the confluence area, resulting in The local resistance coefficient at the confluence increases, and the resistance of the dust removal system increases, thereby increasing the energy consumption of the fan.

Optionally, in the present invention, the end face of the oblique branch diverter pipe 220 facing away from the main oblique branch pipe 210 is connected to half of the end face of the main pipe 130 facing the end face of the main branch diverter pipe 120 , and the end face of the main pipe 130 facing the main branch diverter pipe 120 The other half of the end surface of one end is connected with the main branch expanding pipe 120. Specifically, the oblique branch expanding pipe 220 is partly intersected with the peripheral wall surface of the main branch expanding pipe 120, and the oblique branch expanding pipe 220 and the main branch expanding pipe 220 are gradually expanding. The outline of the intersecting lines at the joints of the pipes 120 is horseshoe-shaped, so that the end face of the inclined branch diverging pipe 220 facing the main pipe 130 and the end face of the main branch expanding pipe 120 facing the main pipe 130 are two semicircular rings, and they are spliced to form a joint with the main pipe 130 is a complete circular surface adapted to the end surface of one end of the main divergent tube 120 . The oblique branch expanding pipe 220 is directly connected to part of the end surface of the main pipe 130, so that the intersection area of the main branch expanding pipe 120 and the oblique branch expanding pipe 220 is as close as possible to the main pipe 130, and the flow area of the main pipe 130 is larger. The closer the air flow is to the main pipe 130 to merge, the more the merged flow velocity can be reduced, the collision can be reduced, and the energy loss can be reduced. In addition, the closer the inclined branch expander 220 is to the main pipe 130, the more the wear area opposite to the inclined branch expander 220 will deviate from the main branch expander 120, so that it is only necessary to set a wear-resistant layer on the inner wall of the main pipe 130 instead of It is necessary to set a wear-resistant layer on the main branch expanding pipe 120. Since the main branch expanding pipe 120 is a tapered surface, it is difficult to install a wear-resistant layer. The wear-resistant layer is all arranged on the main pipe 130 to facilitate processing.

More preferably, both the spoiler block 140 and the wear-resistant layer are connected to the inner wall of the main pipe 130 , and the inner wall of the main pipe 130 is easier to install the spoiler block 140 and the wear-resistant layer than the inner wall of the main divergent pipe 120 . More preferably, the height of the spoiler block 140 is half of the difference between the pipe diameter of the main pipe 130 and the pipe diameter of the main branch pipe 110, so as to avoid the high height of the spoiler block 140 and produce obvious obstruction to the airflow flowing into the main branch pipe 110, and also It is avoided that the height of the spoiler block 140 is too low to affect its spoiler effect.

Of course, in other embodiments, the end of the oblique branch diverter pipe 220 facing away from the main oblique branch pipe 210 can also be completely connected to the main branch diverter pipe 120, and the entire end surface of the main pipe 130 is in line with the entire end surface of the main branch diverter pipe 120. Connection, in order to realize the pipe connection of the three-way pipe.

Optionally, in the present invention, the range of the wear area is as follows:

Range on the z axis:

Range on the x-axis: x≤0;

Range on the y-axis:

-tan(γ)·[x-(L ₂ -L)tanα ₁ ]≤y≤tan(γ)·[x-(L ₂ -L)tanα ₁ ];

Where x and y satisfy the relationship:

The x-axis, y-axis and Z-axis all pass through the origin O and are perpendicular to each other; the coordinate system origin O is the center point of the end face of the main branch expanding pipe 120 inlet end, that is, the end face where the main branch expanding pipe 120 intersects with the main branch pipe 110 Center point; the x-axis and y-axis are located on the end face of the main branch expander 120 inlet end, that is, the x-axis and y-axis are straight lines in the radial direction of the main branch expander 120, and the positive semi-axis of the x-axis faces the oblique One side of the branch pipe 200; the Z axis coincides with the central axis of the main branch expanding pipe 120 and the positive half axis of the Z axis is set towards the main pipe 130;

In the formula: R ₀ is the inner radius of the main branch pipe 110, L is the distance from the common vertex of the inclined branch expanding pipe 220 to the origin O, R ₃ is the inner radius of the main pipe 130, and γ is the gradual expansion of the inclined branch expanding pipe 220 angle, σ is the gradual expansion angle of the main branch expanding pipe 120; α1 is the angle between the oblique 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 oblique branch pipe 200, and the above has been defined The included angle is an acute angle; L ₂ is the length of the main branch expander 120 .

The peripheral wall of the oblique branch expander 220 is a conical surface, and the apex of the cone containing the conical surface is the common apex of the oblique branch expander 220, that is, as shown in Figure 1b, any longitudinal direction of the oblique branch expander 220 The intersection point G of the extension lines of the sidelines on both sides of the cross section (passing through the central axis of the inclined branch expander 220 ) is the common apex of the conical surface, and the conical surface may be a conical surface.

Optionally, in the present invention, the wear area includes a high wear rate zone and a medium wear rate zone, and the wear-resistant layer includes a high wear-resistant layer 150 located in the high wear rate zone and a medium wear-resistant layer 160 located in the medium wear rate zone . The high wear rate zone is subject to higher wear than the medium wear rate zone, so the high wear-resistant layer 150 and the medium wear-resistant layer 160 can be designed differently, and the high wear-resistant layer 150 is made of a material with better wear resistance, which not only ensures the wear resistance The grinding performance and service life are improved without wasting materials and saving costs.

Optionally, in the present invention, the high wear-resistant layer 150 is thicker than the medium wear-resistant layer 160 , so as to further enhance the wear life of the high wear-resistant layer 150 .

It can be understood that when the three-way pipe is transported, the two airflows entering from the main branch pipe 110 and the main inclined branch pipe 210 meet, generating eddy currents, causing local accumulation of dust, causing energy loss, increasing resistance, and the airflow dust entering the main inclined branch pipe 210 It will cause impact and wear on the pipe wall; for this reason, the airflow flowing into the main branch pipe 110 is decelerated through the main branch expanding pipe 120, and the inclined branch expanding pipe 220 is used to decelerate the airflow entering the main inclined branch pipe 210, so that the two streams pass through the descending pipe. The high-speed air flow converges in the area near the main branch expanding pipe 120, which avoids the strong impact of the air flow to generate local high pressure, and produces a large energy exchange, resulting in an increase in the local resistance coefficient at the confluence; use the spoiler 140 occupies the leeward area of the airflow that the oblique branch pipe 200 enters, thereby reducing the vortex near this area, reducing the accumulation of dust, and through the shape of the spoiler 140 (two gathered sides 141) and size (the height of the spoiler 140 is The half of the difference between the pipe diameter of the main pipe 130 and the pipe diameter of the main branch pipe 110) is further optimized to ensure the effect of reducing eddy current and avoid causing obvious resistance to the airflow; and the setting of the wear area and the wear-resistant layer is used again. The wear area is targeted to enhance the wear resistance, and by further decomposing the wear area, a high wear resistance layer 150 with good wear resistance and high thickness is provided for the area with a high wear rate, so as to improve the wear resistance and service life while reducing The waste of materials, through the above-mentioned multi-dimensional comprehensive improvement, can comprehensively improve the problem of the tee pipe, reduce the eddy current, energy loss, airflow resistance, and dust accumulation of the tee pipe, reduce the use of wear-resistant materials and ensure wear resistance.

The effects of the embodiments of the present invention will be further described below in conjunction with the embodiments and the accompanying drawings.

Embodiment 1 of the present invention:

In this embodiment, the inlet speed of the inclined branch pipe is 16.5m/s, and the diameter of the main inclined branch pipe 210 is 250mm; the inlet speed of the main branch pipe is 16.5m/s, and the diameter is 290mm; The diameter of the rear end of the outlet of the main branch expanding pipe is 390 mm, and a 2 m long main pipe 130 is connected to the rear end of the outlet. The tee pipes are all 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 spoiler 140 is 20 degrees, the height is 50 mm, the width covers a quarter of the circumference of the inner wall of the corresponding main channel, and the length is 360 mm.

Comparative example 2 of conventional tee pipe:

Compared with Example 1, the inclined branch expanding pipe is changed to an oblique straight pipe with a pipe diameter of 250 mm, the main pipe has no spoiler 140 on the inner wall of the same side of the inclined branch pipe, and the diverging angle of the main branch expanding pipe is 8 degrees.

Simulation conditions: the particle size is 150 μm, the divergence angle of the main branch diverging pipe of embodiment 1 and embodiment 2 is 8 degrees, the angle between the inclined branch pipe and the main pipe (the flow direction of the inclined channel 201 and the flow direction of the main channel 101 The angle formed between the directions) is 45 degrees.

Embodiment 1 and comparative example 2 are analyzed below:

Fig. 3a is the energy dissipation distribution diagram of the embodiment of the present invention; Fig. 3b is the energy dissipation distribution diagram of the tee pipe in the prior art. It can be seen from Fig. 3a and Fig. 3b that in the embodiment of the present invention, the area of the energy dissipation area at the confluence is smaller and the effective length is shorter through the inclined branch diverging pipe. The use of the inclined branch expander 220 on the upper part of the inclined branch can reduce the high pressure generated by the collision between the two airflows when they are mixed, thereby reducing the energy exchange between the two airflows and effectively weakening the pressure of the two fluids when they are mixed in the tee pipe. Energy loss thus reduces fluid resistance, and the spoiler block 140 reduces eddy current, further reducing energy loss. By calculation, the drag reduction ratio of Example 1 of the present invention compared with Comparative Example 2 is about 30%.

Fig. 4a is a velocity distribution diagram of the airflow in the pipeline of Example 1 of the present invention; Fig. 4b is a velocity distribution diagram of the airflow in the pipeline of Comparative Example 2. It can be seen from Fig. 4b that there is a large area of low-velocity zone in the leeward area of the inclined branch pipe relative to the airflow direction of the main channel 101, and the minimum velocity is only 2m/s, and the dust in the pipeline will be deposited in a large amount in the low-velocity zone, so It will increase the airflow disturbance in the pipeline and increase the resistance of the pipeline; at the same time, when the dust in the pipeline accumulates too much, it will increase the weight of the pipeline, and in severe cases, it will also cause the pipeline to collapse. As can be seen from Fig. 4a, in Embodiment 1 of the present invention, a bump structure (spoiler block 140) is provided on the inner wall of the main pipe 130 on the same side of the inclined branch pipe 200, so that the scope of the leeward zone is only 20% of that of Comparative Example 2, and The minimum flow velocity in the leeward area is also increased to 6m/s, which significantly reduces the range and intensity of the vortex and reduces the risk of dust deposition in this area.

Fig. 5 is the cloud diagram of the wear rate distribution of the tee pipe in Example 1 of the present invention, as can be seen from the figure, the wear area of the tee pipe is mainly distributed on the inner wall surface of the main pipe 130 on the side opposite to the inclined branch pipe 200, and other areas Basically no wear and tear. The wear rate of the main pipe on the inner wall surface on the opposite side of the inclined branch pipe is also different. Among them, there are two areas with high wear rate, which is a high wear rate area, and the middle of the two high wear rate areas is a medium wear rate area. for the low wear rate zone.

Compared with the prior art, this patent has the following advantages:

1. Both the main branch expanding tube 120 and the oblique branch expanding tube 220 are composed of continuously expanding reducer tubes. After the main branch expanding tube 120 and the oblique branch expanding tube 220 converge, each occupies a semicircle on the section of the main tube 130 , the oblique branch expander 220 can reduce the high pressure generated by the collision between the two air streams when they are mixed, thereby reducing the energy exchange between the two air streams and effectively weakening the energy loss when the two streams are mixed in the tee pipe, thereby Reduce fluid resistance.

2. Set different wear-resistant materials on the inner wall surface on the opposite side of the inclined branch of the tee main pipe (that is, the wear area of the main channel 101) according to different wear rates. High-priced AL ₂ O ₃ wear-resistant ceramics, and the thickness of the wear-resistant material of the high wear-resistant layer 150 is increased by 30%, which better protects the outer wall of the pipe at this part from being worn through; for medium wear-resistant in the medium wear rate area The layer 160 is provided with wear-resistant alloy steel with the second lowest wear resistance and lower price; no wear-resistant material may be provided for the low wear rate area. The wear-resistant layer is arranged on the inner wall surface of the main pipe 130 opposite to the inclined branch pipe and covers a range of 180° of the inner wall surface of the main pipe 130 . This design method can not only increase the wear life of the tee pipe, but also reduce the amount of wear-resistant materials used, thereby reducing costs.

3. When the inclined branch pipe merges into the main pipe, it will form a vortex area in its leeward area, and the speed in the eddy current area will decrease, and the dust in the dust removal pipe will be deposited in the low-velocity area. In order to reduce the dust deposition in the vortex, this patent sets a bump (spoiler block 140) whose shape is close to the vortex area in the vortex area. There is no vortex area, so that there is no low-velocity area in the tee pipe, so that dust will not deposit in this area, reducing the risk of pipe collapse due to dust deposition.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. A tee pipe, characterized in that it comprises: A supervisor (100) with a main channel (101); An inclined branch pipe (200), connected to the peripheral wall of the main pipe (100), and has an inclined passage (201) communicating with the main passage (101), and the flow direction of the inclined passage (201) is the same as that of the main passage The angle formed between the flow directions of (101) is an acute angle; Wherein the inner wall of the main channel (101) has a wear area, the wear area 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 vortex caused by the fluid flowing in from the inclined branch pipe (200). 2. The tee pipe according to claim 1, characterized in that: the turbulence structure is a turbulence block (140) arranged on the inner wall of the main channel (101), and the inclined branch pipe (200) and the turbulence The flow blocks (140) are adjacent to each other in the flow direction of the main channel (101) and arranged in sequence along the flow direction of the main channel (101). 3. The tee pipe according to claim 2, characterized in that: the spoiler block (140) has two sides (141), and the two sides (141) are respectively connected to the main channel (101) The flow directions of the two side surfaces (141) are gradually narrowed along the height direction of the spoiler block (140). 4. The tee pipe according to claim 3, characterized in that: the two side surfaces (141) are flat surfaces. 5. The tee pipe according to any one of claims 1 to 4, characterized in that: the main pipe (100) includes main branch pipes (110), main A branch expander (120) and a main pipe (130), the cross-sectional area of the main branch expander (120) gradually increases along the flow direction of the main channel (101). 6. The three-way pipe according to claim 5, characterized in that: the inclined branch pipe (200) comprises a main inclined branch pipe (210) and an inclined branch gradually expanding along the flow direction of the inclined channel (201). A pipe (220), the cross-sectional area of the inclined branch expanding pipe (220) gradually increases along the flow direction, and the inclined branch expanding pipe (220) is at least partially connected to the main branch expanding pipe (120) . 7. The tee pipe according to claim 6, characterized in that, the range of the wear area is as follows: Range on the z axis:

Range on the x-axis: x≤0; Range on the y-axis: -tan(γ)·[x-(L ₂ -L)tanα ₁ ]≤y≤tan(γ)·[x-(L ₂ -L)tanα ₁ ]; Where x and y satisfy the relationship: x ² +y ² =R ₃ ² ; The x-axis, y-axis and Z-axis all pass through the origin O and are perpendicular to each other. The coordinate system origin O is the center point of the end face of the main branch expanding pipe (120), and the x-axis and y-axis are located at the main branch expanding pipe (120). ) on the end face of the inlet end, and the positive semi-axis of the x-axis faces the side of the inclined branch pipe (200), the Z-axis coincides with the central axis of the main branch expanding pipe (120), and the positive semi-axis of the Z-axis faces the main pipe (130) ; In the formula: R ₀ is the inner radius of the main branch pipe (110), L is the distance from the common vertex of the inclined branch expanding pipe (220) to the origin O, R ₃ is the inner radius of the main pipe (130), and γ is the The gradual expansion angle of the expanding pipe (220), σ is the gradual expanding angle of the main branch expanding pipe (120), α ₁ is the angle between the oblique branch pipe (200) and the main pipe (100), L ₂ is the main branch expanding pipe (120) in length. 8. The three-way pipe according to claim 6, characterized in that: the end face of the inclined branch diverging pipe (220) facing away from the main inclined branch pipe (210) and the main pipe (130) facing the main One half of the end face of one end of the branch diverging pipe (120) is connected, and the other half of the end face of the main branch diverging pipe (120) towards the main branch diverging pipe (120) is connected to the main branch diverging pipe (120) connected. 9. The tee pipe according to claim 1, characterized in that: the wear area includes a high wear rate area and a medium wear rate area, and the wear-resistant layer includes a high wear-resistant layer located in the high wear rate area layer (150) and a medium wear-resistant layer (160) located in the medium wear rate zone. 10. The tee pipe according to claim 9, characterized in that the high wear-resistant layer (150) is thicker than the medium wear-resistant layer (160).

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