CN109114345B - Three-layer hot air distribution pipe - Google Patents
Three-layer hot air distribution pipe Download PDFInfo
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- CN109114345B CN109114345B CN201810826884.4A CN201810826884A CN109114345B CN 109114345 B CN109114345 B CN 109114345B CN 201810826884 A CN201810826884 A CN 201810826884A CN 109114345 B CN109114345 B CN 109114345B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L41/00—Branching pipes; Joining pipes to walls
- F16L41/02—Branch units, e.g. made in one piece, welded, riveted
- F16L41/03—Branch units, e.g. made in one piece, welded, riveted comprising junction pieces for four or more pipe members
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Abstract
Three-layer hot air distribution pipe belongs to the technical field of ultralow-concentration methane heat countercurrent oxidation and low-density energy recovery. The method is characterized in that: comprises a main pipe (1) and a plurality of branch pipes (3) which are arranged at two sides of the main pipe (1) and communicated with the main pipe (1); each section of main pipe (1) comprises a conveying main pipe (6), a pre-distribution main pipe (11) and a distribution main pipe (5) which are sequentially arranged from inside to outside, a main pipe pre-distribution cavity (13) is communicated with a main pipe distribution cavity (8) of the next section of main pipe (1), and the conveying main pipe (6) is simultaneously communicated with the main pipe pre-distribution cavity (13) of the next section of main pipe (1) and the conveying main pipe (6); each branch pipe (3) comprises a conveying branch pipe and a distribution branch pipe which are sequentially arranged from inside to outside, and the air outlet end of the conveying branch pipe is communicated with the conveying branch pipe and the distribution branch pipe of the next branch pipe. The three-layer hot air distribution pipe reduces the temperature difference of hot air along the flowing direction of the whole air flow, and effectively improves the difference of the quality of the hot air of each part.
Description
Technical Field
Three-layer hot air distribution pipe belongs to the technical field of ultralow-concentration methane heat countercurrent oxidation and low-density energy recovery.
Background
The main component of coal mine gas is methane, which is not only a gas energy source, but also a greenhouse gas. Except for partial extraction, most of gas is directly discharged into the atmosphere through a coal mine ventilation system, so that the problems of energy waste and atmospheric environmental pollution are caused. The coal mine ventilation air heating countercurrent oxidation device (TFRR for short) can oxidize methane in ventilation air into carbon dioxide and water, and low-quality energy utilization and greenhouse gas emission reduction are realized.
Before the coal mine ventilation air methane oxidation device normally operates, the central part of an oxidation bed needs to be heated to about 900-1000 ℃ by using certain energy, certain temperature distribution is formed, the temperature distribution condition directly influences whether the oxidation bed can normally operate, and therefore the heating starting technology is a key technology for realizing ventilation air methane oxidation.
At present, the heating starting mode of the coal mine ventilation air methane oxidation device has two modes: one is an electric heating type and the other is a hot air heating type.
The electric heating type is that a heating element (an electric heating alloy heating wire) is directly embedded in heat storage ceramic in a high-temperature region in the middle of an oxidation bed, the heating is electrified and heated when the heating element is started, the heating is stopped after the temperature reaches the methane oxidation reaction temperature, and self-maintenance reaction is carried out by heat emitted by the methane oxidation reaction. The heating starting technology has the advantages of simple structure, easy control and the like, but also has a plurality of defects: for example, after the electric heater stops heating, the high-temperature region which is in the oxidation atmosphere for a long time is easy to oxidize and become brittle, even break, and lose the function of restarting. In addition, the electric heating starting has large electric load, is directly buried in the oxidation bed, has large maintenance and replacement difficulty, has high working temperature of the electric heating wire, needs to adopt an electric heating body alloy with very high melting point, and has high price and high cost.
The hot air heating type is characterized in that a burner is used for heating externally, high-temperature flue gas and air conveyed by a fan are mixed in a hot air temperature adjusting chamber, the mixed hot gas enters a hot air distribution header pipe, then enters each hot air distribution branch pipe, and finally enters a ceramic heat accumulator through small holes in the wall of each hot air distribution branch pipe to heat the ceramic heat accumulator. The technology has applied for patent 'a heating starting system of a mine ventilation air methane oxidation device', and the application number is 200810159296.6. In addition, there is a drying device for hot air pipes, which is disclosed in the related patent application No. 98243128.7, and has the advantages of high reliability, low cost, easy maintenance, flexible fuel, small point load, etc. But has problems that: (1) the temperature distribution on the same cross section of the oxidation bed is uneven, the central temperature is high, the temperatures on the two sides are low, the temperature on the front side is high, the temperature on the rear side is low, and the temperature on the whole temperature field of the oxidation bed and the oxidation rate of the device are greatly influenced; the problem of uneven temperature distribution also exists to drying device's drying space, and high back is low in the front on the cross section, and high bottom is gone up to the longitudinal section, influences whole drying effect, and the heating drying space is bigger, and drying effect is worse. (2) For a larger heating space, the overall thermal deformation is more obvious due to longer heat branch pipelines.
The reason for this is that, in the process of hot air distribution, with the outward heat dissipation of the pipe wall, the temperature of the hot air is gradually reduced from front to back no matter along the main pipe or along the branch pipe, the quality difference of the front and back hot air is a key factor causing the uneven temperature of the cross section along the flow direction, and the adjustment effect is not obvious through a simple structure, so that the essential problem cannot be solved.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the defects of the prior art are overcome, and the three-layer hot air distribution pipe capable of avoiding the gradual temperature reduction of hot air in the conveying process along the conveying direction is provided.
The technical scheme adopted by the invention for solving the technical problems is as follows: this three-layer hot-blast distributing pipe, its characterized in that: the gas outlet end of the main pipe is provided with a main pipe end pipe used for sealing the gas outlet end, and the gas outlet end of each branch pipe is provided with a branch pipe end pipe used for sealing the gas outlet end;
each section of main pipe comprises a conveying main pipe, a pre-distribution main pipe and a distribution main pipe which are sequentially arranged from inside to outside, a main pipe distribution cavity is formed between the distribution main pipe and the pre-distribution main pipe, a main pipe pre-distribution cavity is formed between the pre-distribution main pipe and the conveying main pipe, the main pipe distribution cavity is communicated with the air inlet end of the corresponding branch pipe, the main pipe pre-distribution cavity is communicated with the main pipe distribution cavity of the next section of main pipe, and the conveying main pipe is simultaneously communicated with the main pipe pre-distribution cavity of the next section of main pipe and the conveying main pipe;
each section of branch pipe comprises a conveying branch pipe and a distribution branch pipe which are sequentially arranged from inside to outside, the air outlet end of the conveying branch pipe is communicated with the conveying branch pipe and the distribution branch pipe of the next section of branch pipe simultaneously, the air inlet ends of the conveying branch pipe and the distribution branch pipe are communicated with the main pipe simultaneously, and the outer wall of the distribution branch pipe is provided with a branch pipe air outlet hole.
Preferably, a pre-distribution branch pipe is arranged between the conveying branch pipe and the distribution branch pipe of each branch pipe, a branch pipe pre-distribution cavity is formed between the pre-distribution branch pipe and the conveying branch pipe, a branch pipe distribution cavity is formed between the pre-distribution branch pipe and the distribution branch pipe, the branch pipe pre-distribution cavity is communicated with the branch pipe distribution cavity of the next branch pipe, and the conveying branch pipe is communicated with the branch pipe pre-distribution cavity and the conveying branch pipe of the next branch pipe.
Preferably, the air inlet end of the conveying branch pipe of each section of branch pipe is arranged in the corresponding pre-distribution branch pipe, so that a branch pipe communication cavity for communicating the branch pipe pre-distribution cavity with the conveying branch pipe is formed at the air inlet end of the pre-distribution branch pipe.
Preferably, the air inlet end of the conveying main pipe of each section of main pipe is arranged in the corresponding pre-distribution main pipe, so that a main pipe communicating cavity for communicating the main pipe pre-distribution cavity with the conveying main pipe is formed at the air inlet end of the pre-distribution main pipe.
Preferably, the diameter of the main conveying pipe is larger than that of the next section of main conveying pipe.
Preferably, the air outlet end of the pre-distribution main pipe is provided with a pre-distribution main pipe butt joint cover with the diameter gradually increasing along the airflow direction, the pre-distribution main pipe butt joint cover is communicated with the next main pipe distribution cavity, the air outlet end of the conveying main pipe is provided with a conical conveying main pipe butt joint cover with the diameter gradually increasing along the airflow direction, and the conveying main pipe butt joint cover is simultaneously communicated with the next main pipe pre-distribution cavity and the conveying main pipe.
Preferably, in the direction of the gas flowmThe cross-sectional area of the main pipe distribution cavity occupying the cross-sectional area of the main pipe of the section1/(n-m+1)Wherein, in the step (A),nis the total number of segments of the main pipe.
Preferably, a main pipe butt joint barrel is arranged between every two adjacent main pipes, and a branch pipe butt joint barrel is arranged between every two adjacent branch pipes.
Preferably, a conveying main pipe reinforcing rib is arranged between the conveying main pipe and the corresponding pre-distribution main pipe, and a pre-distribution main pipe reinforcing rib is arranged between the distribution main pipe and the corresponding pre-distribution main pipe.
Preferably, the main pipe end pipe is a cylinder with one closed end, the open end of the main pipe end pipe is hermetically connected with the air outlet end of the main pipe, the axial length of the main pipe end pipe is equal to that of each section of the main pipe, and branch pipes communicated with the main pipe end pipe are arranged on two sides of the main pipe end pipe.
Compared with the prior art, the invention has the beneficial effects that:
1. the hot air temperature in the main delivery pipe of the three-layer hot air distribution pipe is highest, the air flow in the pre-distribution cavity of the main delivery pipe plays a good role in heat preservation and heat insulation for the air flow of the main delivery pipe, and the hot air in the main delivery pipe is only used for delivery and is not used for shunting, so that the temperature of the hot air in the main delivery pipe distribution cavity of the next section of main delivery pipe is ensured, the temperature difference of the hot air along the flowing direction of the whole air flow is reduced, the difference of the quality of the hot air of each part is effectively improved, and the temperature distribution; in addition, due to the adoption of a segmented structure when the three-layer hot air distribution pipe forms a hot air distribution system, the pipeline deformation caused by expansion with heat and contraction with cold can be reserved in a reserved gap, the distribution pipe is also suitable for distribution of other hot fluids and cold fluids, the application range is wide, the main pipe end pipe can avoid the direct discharge of the air outlet end of the main pipe, the influence is close to the pressure of hot air in the branch pipe of the air outlet end of the main pipe, the pressure of the hot air in each branch pipe is ensured to be equal, the hot air is uniformly distributed, the branch pipe end pipe can avoid the direct discharge of the air outlet end of the branch pipe, the hot air discharged from the branch pipe air outlet hole close to the air outlet end of the branch.
2. The branch pipes also adopt three layers of sleeves, thereby further ensuring and reducing the temperature difference of hot air along the flowing direction of the whole air flow, effectively improving the difference of the quality of the hot air of each part and ensuring that the temperature distribution on the same section of the oxidation bed is more uniform.
3. The branch pipe communicating cavity can ensure that the conveying branch pipe is communicated with the branch pipe pre-distribution cavity and the conveying branch pipe of the next section of branch pipe at the same time, and therefore hot air in the conveying branch pipe is conveniently and uniformly distributed to the branch pipe pre-distribution cavity and the conveying branch pipe of the next section of branch pipe.
4. The main pipe communicating cavity can ensure that the conveying main pipe is communicated with the main pipe pre-distribution cavity and the conveying main pipe of the next section of main pipe at the same time, and therefore hot air in the conveying main pipe is conveniently and uniformly distributed to the main pipe pre-distribution cavity and the conveying main pipe of the next section of main pipe.
5. The diameter of the main conveying pipe is larger than that of the next section of main conveying pipe, so that the uniformity of the air flow in each section of main conveying pipe can be ensured to the maximum extent.
6. The pre-distribution main pipe is communicated with the next section of main pipe distribution cavity through the pre-distribution main pipe butt joint cover, the conveying main pipe is communicated with the next section of main pipe pre-distribution cavity and the conveying main pipe through the conveying main pipe butt joint cover, hot air can be distributed better, and hot air distribution disorder can be avoided.
7. The arrangement of the sections of the main pipes of the sections ensures the uniformity of each stage of flow distribution.
8. The strengthening rib of being responsible for can enough be responsible for and the predistribution is responsible for strengthening carrying, makes carrying again and is responsible for and be responsible for with the predistribution and be responsible for and link to each other and the interval setting, and the main pipe strengthening rib of being responsible for of predistribution can enough be responsible for and the distribution is strengthened presstribution, makes the main pipe of predistribution and distribution be responsible for and link to each other and the interval.
9. The lateral part of the main pipe end pipe is also provided with a branch pipe, so that the main pipe is fully utilized, and the temperature of the oxidation bed at the lateral part of the main pipe end pipe is prevented from being too low.
Drawings
FIG. 1 is a schematic front view of a three-layer heated air distribution pipe.
Fig. 2 is a front sectional view of the main pipe.
Fig. 3 is a schematic sectional view in the direction of a-a in fig. 2.
Fig. 4 is a schematic diagram of the docking of the main pipe.
FIG. 5 is a front cross-sectional schematic view of the end master tube.
In the figure: 1. the device comprises a main pipe 2, a main pipe end pipe 201, an end pipe distribution hole 3, a branch pipe 4, a branch pipe end pipe 5, a distribution main pipe 501, a main pipe distribution hole 6, a conveying main pipe 601, a conveying main pipe butt joint cover 7, a main pipe conveying cavity 8, a main pipe distribution cavity 9, a main pipe butt joint barrel 10, a conveying main pipe reinforcing rib 11, a pre-distribution main pipe 1101, a pre-distribution main pipe butt joint cover 12, a main pipe communication cavity 13, a main pipe pre-distribution cavity 14 and a pre-distribution main pipe reinforcing rib.
Detailed Description
Fig. 1 to 5 are preferred embodiments of the present invention, and the present invention will be further described with reference to fig. 1 to 5.
The three-layer hot air distribution pipe comprises a main pipe 1 and a plurality of branch pipes 3 which are arranged on two sides of the main pipe 1 and communicated with the main pipe 1, wherein the main pipe 1 is provided with a plurality of sections which are sequentially connected end to end, each branch pipe 3 is also provided with a plurality of sections which are sequentially connected end to end, the air outlet end of the main pipe 1 is provided with a main pipe end pipe 2 for sealing the air outlet end, and the air outlet end of each branch pipe 3 is provided with a branch pipe end pipe 4 for sealing the air outlet end; each section of main pipe 1 comprises a conveying main pipe 6, a pre-distribution main pipe 11 and a distribution main pipe 5 which are sequentially arranged from inside to outside, a main pipe distribution cavity 8 is formed between the distribution main pipe 5 and the pre-distribution main pipe 11, a main pipe pre-distribution cavity 13 is formed between the pre-distribution main pipe 11 and the conveying main pipe 6, the main pipe distribution cavity 8 is communicated with the air inlet end of the corresponding branch pipe 3, the main pipe pre-distribution cavity 13 is communicated with the main pipe distribution cavity 8 of the next section of main pipe 1, and the conveying main pipe 6 is simultaneously communicated with the main pipe pre-distribution cavity 13 of the next section of main pipe 1 and the conveying main pipe 6; each section of branch pipe 3 comprises a conveying branch pipe and a distribution branch pipe which are sequentially arranged from inside to outside, the air outlet end of the conveying branch pipe is communicated with the conveying branch pipe and the distribution branch pipe of the next section of branch pipe simultaneously, the air inlet ends of the conveying branch pipe and the distribution branch pipe are communicated with the main pipe simultaneously, and the outer wall of the distribution branch pipe is provided with a branch pipe air outlet hole. The temperature of hot air in the main conveying pipe 6 of the three-layer hot air distribution pipe is highest, the air flow in the main pipe pre-distribution cavity 13 plays good heat preservation and heat insulation roles on the air flow of the main conveying pipe 6, and the hot air in the main conveying pipe 6 is only used for conveying and not used for shunting, so that the temperature of the hot air in the main pipe distribution cavity 8 of the next section of main pipe 1 is ensured, the temperature difference of the hot air in the flowing direction of the whole air flow is reduced, the quality difference of the hot air of each part is effectively improved, and the temperature distribution on the same section of the oxidation bed is more uniform; in addition, due to the adoption of a segmented structure when the three-layer hot air distribution pipe forms a hot air distribution system, the pipeline deformation caused by expansion with heat and contraction with cold can be reserved in a reserved gap, the distribution pipe is also suitable for distribution of other hot fluids and cold fluids, the application range is wide, the main pipe end pipe 2 can avoid the direct discharge of the air outlet end of the hot air by the main pipe, the influence is on the pressure of the hot air in the branch pipe 3 close to the air outlet end of the main pipe 1, the pressure of the hot air in each branch pipe 3 is equal, the hot air is uniformly distributed, the 3 end pipe of the branch pipe can avoid the direct discharge of the air outlet end of the hot air by the branch pipe 3, the discharged hot air of the branch pipe air outlet hole close to.
The present invention is further described with reference to the following detailed description, however, it should be understood by those skilled in the art that the detailed description given herein with respect to the accompanying drawings is for better explanation and that the present invention is not necessarily limited to the specific embodiments, but rather, for equivalent alternatives or common approaches, may be omitted from the detailed description, while still remaining within the scope of the present application.
Example 1
As shown in FIGS. 1 to 5: in this embodiment, be responsible for 1 and be provided with the three-section that the end to end connects gradually along the axial, and every section left end of being responsible for 1 is the inlet end, and the right-hand member is for giving vent to anger the end, is provided with in the right-hand member of being responsible for 1 and is responsible for end pipe 2, and every section upper and lower both sides of being responsible for 1 all interval equipartition has three branch pipes 3, and branch pipe 3 sets up along the direction of radius of being responsible for 1, and the right-hand member of being responsible for end pipe 2 seals, and the upper and lower both sides of being. Every branch pipe 3 is close to the one end of being responsible for 1 or being close to and is responsible for end pipe 2 and be the inlet end, and every branch pipe 3 keeps away from to be responsible for 1 or keeps away from the one end of being responsible for end pipe 2 and is the end of giving vent to anger, and every branch pipe 3 is equipped with two sections of end-to-end connection along the axial, and the end of giving vent to anger of every branch pipe 3 all is provided with branch pipe end pipe 4, and the end of giving vent to. The number of stages of the main pipe 1 and the branch pipe 3 can be adjusted as necessary.
Each section of main pipe 1 comprises a conveying main pipe 6, a pre-distribution main pipe 11 and a distribution main pipe 5 which are sequentially arranged from inside to outside, the pre-distribution main pipe 11 and the corresponding distribution main pipe 5 and conveying main pipe 6 are arranged at intervals, so that a main pipe distribution cavity 8 is formed between the pre-distribution main pipe 11 and the distribution main pipe 5, and a main pipe pre-distribution cavity 13 is formed between the conveying main pipe 6 and the pre-distribution main pipe 11. The air inlet end of the main delivery pipe 6 is arranged in the air inlet end of the pre-distribution main pipe 11, so that a main pipe communicating cavity 12 for communicating the air inlet end of the pre-distribution main pipe 11 with the air inlet end of the main delivery pipe 6 is formed at the air inlet end of the pre-distribution main pipe 11. In the direction of the air flowmThe section of the main pipe distribution cavity 8 has a cross-sectional area which accounts for the cross-sectional area of the main distribution pipe 51/(n-m+1)Wherein, in the step (A),nthe main pipe end pipe 2 does not need to be divided for the total number of stages of the main pipe 1, and therefore the sectional area of the main pipe distribution chamber 8 is the sectional area of the main pipe end pipe 2.
The air outlet end of the distribution main pipe 5 is provided with a main pipe butting cylinder 9 with the diameter larger than that of the distribution main pipe 5, the inner diameter of the main pipe butting cylinder 9 is equal to or slightly larger than the outer diameter of the distribution main pipe 5 of the next section of main pipe 1, during butting, the air inlet end of the distribution main pipe 5 of the next section of main pipe 1 extends into the main pipe butting cylinder 9, meanwhile, the air outlet end of the distribution main pipe 5 of the section of main pipe and the air inlet end of the distribution main pipe 5 of the next section of main pipe 1 are arranged at intervals, and a reserved gap absorbs pipeline deformation caused by thermal expansion and cold contraction. The main pipe butting cylinder 9 and the corresponding air outlet end of the distribution main pipe 5 are integrally arranged.
The upper side and the lower side of each section of the main distribution pipe 5 are respectively provided with three radial main pipe distribution holes 501 at intervals, the air inlet ends of the branch pipes 3 extend into the main pipe distribution holes 501 and are in sealed connection with the main pipe distribution holes 501, so that two sides of each section of the main pipe 1 are respectively provided with three branch pipes 3, and the cross-sectional area of each section of the main distribution cavity 8 of the main pipe 1 is equal to the sum of the cross-sectional areas of all the branch pipes 3 connected with the main pipe 1.
The right end of the main pipe 1, namely the air outlet end of the main pipe 1, is provided with a main pipe end pipe 2, the main pipe end pipe 2 is a cylinder with a closed right end, and the left end of the main pipe end pipe 2 extends into a main pipe butt joint cylinder 9 at the rightmost end of the main pipe 1, so that the connection and installation of the main pipe end pipe 2 are completed. Be responsible for the upside and the downside of end pipe 2 and all the interval equipartition have axial three end pipe distribution hole 201, are responsible for the upside and the downside of end pipe 2 and also are provided with three branch pipes 3 that are linked together with end pipe distribution hole 201 respectively.
The bilateral symmetry between the main conveying pipe 6 and the pre-distribution main pipe 11 is provided with an axial main conveying pipe reinforcing rib 10, the inner side of the main conveying pipe reinforcing rib 10 is fixedly connected with the outer wall of the main conveying pipe 6, the outer side of the main conveying pipe reinforcing rib 10 is connected with the inner wall of the main pre-distribution pipe 11, the strength of the main conveying pipe 6 and the main pre-distribution pipe 11 can be increased, and the main conveying pipe 6 can be arranged in the main pre-distribution pipe 11 at intervals. An axial pre-distribution main pipe reinforcing rib 14 is arranged between the pre-distribution main pipe 11 and the distribution main pipe 5, the plane of the pre-distribution main pipe reinforcing rib 14 is vertical to the plane of the conveying main pipe reinforcing rib 10, and the plane of the main pipe distribution hole 501 is vertical to the plane of the pre-distribution main pipe reinforcing rib 14, so that mutual interference between the main pipe distribution hole 501 and the pre-distribution main pipe reinforcing rib 14 is avoided.
The air outlet end of the pre-distribution main pipe 11 is provided with a conical pre-distribution main pipe butt joint cover 1101 with the diameter gradually increasing along the airflow direction, the pre-distribution main pipe butt joint cover 1101 is arranged at an interval with the inner wall of the corresponding distribution main pipe 5, and the air outlet end of the pre-distribution main pipe butt joint cover 1101 is in butt joint with the air inlet end of the distribution main pipe 5 of the next section of main pipe 1, so that hot air in the main pipe pre-distribution cavity 13 of the current section of main pipe 1 enters the main pipe distribution cavity 8 of the next section of main pipe 1. The air outlet end of the delivery main pipe butting cover 601 of the delivery main pipe 6 is connected with the air inlet end of the pre-distribution main pipe 11 of the next section of main pipe 1, so that the hot air delivered by the delivery main pipe 6 of the section of main pipe 1 enters the main pipe communicating cavity 12 of the next section of main pipe 1 and enters the main pipe pre-distribution cavity 13 and the main pipe delivery cavity 7 of the next section of main pipe 1 through the main pipe communicating cavity 12. The diameter of the main conveying pipe 6 is larger than that of the main conveying pipe 6 of the next section of main pipe 1. Pre-distribution header 11 and the corresponding pre-distribution header are integrally provided with shield 1101.
Each section of branch pipe 3 comprises a conveying branch pipe and a distribution branch pipe which are sequentially arranged from inside to outside, a pre-distribution branch pipe is arranged between the distribution branch pipe and the conveying branch pipe of each section of branch pipe 3, the pre-distribution branch pipe and the corresponding distribution branch pipe and conveying branch pipe are arranged at intervals, so that a branch pipe distribution cavity is formed between the pre-distribution branch pipe and the distribution branch pipe, and a branch pipe pre-distribution cavity is formed between the conveying branch pipe and the pre-distribution branch pipe. The air inlet end of the conveying branch pipe is arranged in the air inlet end of the pre-distribution branch pipe, so that a branch pipe communicating cavity for communicating the air inlet end of the pre-distribution branch pipe with the air inlet end of the conveying branch pipe is formed at the air inlet end of the pre-distribution branch pipe. In the direction of the air flowaThe cross-sectional area of the branch distribution cavity of the branch pipe 3 in the section accounts for the cross-sectional area of the branch pipe 3 in the section1/(b-a+1)Wherein, in the step (A),bthe branch pipe end pipe 4 does not need to be divided for the total number of the branch pipes 3, so the sectional area of the branch pipe distribution cavity is the sectional area of the branch pipe end pipe 4.
The end of giving vent to anger of distribution branch pipe is provided with the branch pipe butt joint section of thick bamboo that the diameter is greater than the distribution branch pipe diameter, and the internal diameter of branch pipe butt joint section of thick bamboo is equal to or is a bit bigger than the external diameter of the distribution branch pipe of next section branch pipe 3, and during the butt joint, the inlet end of the distribution branch pipe of next section branch pipe 3 stretches into in the branch pipe butt joint section of thick bamboo, makes the end of giving vent to anger of this section distribution branch pipe and the inlet end interval setting of the distribution branch pipe of next section branch pipe 3 simultaneously, and the pipeline that. The branch pipe butt joint cylinder and the air outlet end of the corresponding distribution branch pipe are integrally arranged.
Three radial branch pipe air outlet holes are formed in the left side and the right side of each section of distribution branch pipe at intervals, so that hot air can uniformly flow out, and the sectional area of each section of branch pipe distribution cavity of each branch pipe 3 is equal to the sum of the sectional areas of all branch pipe air outlet holes connected with the branch pipe 3.
The end of giving vent to anger of branch pipe 3 is provided with branch pipe end pipe 4, and branch pipe end pipe 4 is for keeping away from the one end confined drum of branch pipe 3, and the one end that is close to branch pipe 3 of branch pipe end pipe 4 extends in the branch pipe butt joint section of thick bamboo of adjacent one section branch pipe 3 to the connection installation of branch pipe end pipe 4 has been accomplished. The left side and the right side of each branch pipe end pipe 4 are respectively and evenly distributed with three radial end pipe air outlet holes at intervals, so that hot air can uniformly flow out.
The bilateral symmetry between the conveying branch pipe and the pre-distribution branch pipe is provided with axial conveying branch pipe reinforcing ribs, the inner sides of the conveying branch pipe reinforcing ribs are fixedly connected with the outer wall of the conveying branch pipe, the outer sides of the conveying branch pipe reinforcing ribs are connected with the inner wall of the pre-distribution branch pipe, the strength of the conveying branch pipe and the pre-distribution branch pipe can be increased, and the conveying branch pipe can be arranged in the pre-distribution branch pipe at intervals. An axial pre-distribution branch pipe reinforcing rib is arranged between the pre-distribution branch pipe and the distribution branch pipe, the plane where the pre-distribution branch pipe reinforcing rib is located is perpendicular to the plane where the conveying branch pipe reinforcing rib is located, and the plane where the branch pipe air outlet hole is located is perpendicular to the plane where the pre-distribution branch pipe reinforcing rib is located, so that mutual interference between the branch pipe distribution hole and the pre-distribution branch pipe reinforcing rib is avoided.
The air outlet end of the pre-distribution branch pipe is provided with a conical pre-distribution branch pipe butt joint cover with the diameter gradually increasing along the airflow direction, the pre-distribution branch pipe butt joint cover is arranged at an interval with the inner wall of the corresponding distribution branch pipe, the air outlet end of the pre-distribution branch pipe butt joint cover is in butt joint with the air inlet end of the distribution branch pipe of the next section of branch pipe, and hot air in the branch pipe pre-distribution cavity of the branch pipe 3 enters the branch pipe distribution cavity of the next section of branch pipe 3. The delivery branch pipe butt joint cover of delivery branch pipe's delivery end links to each other with the inlet end of the pre-distribution branch pipe of next section branch pipe 3, makes the hot-blast branch pipe intercommunication intracavity that enters into next section branch pipe 3 of delivery branch pipe 3 of this section branch pipe 3 transport to branch pipe pre-distribution chamber and branch pipe delivery intracavity that enter into next section branch pipe 3 through branch pipe intercommunication chamber. The diameter of the conveying branch pipe is larger than that of the conveying branch pipe of the next branch pipe 3. The pre-distribution branch pipes and the corresponding pre-distribution branch pipes are integrally arranged with the butt covers.
Example 2
Example 2 differs from example 1 in that: each branch pipe 3 only comprises a distribution branch pipe and a delivery branch pipe which are coaxially arranged, the diameter of the delivery branch pipe is smaller than that of the distribution branch pipe, so that a branch pipe distribution cavity is formed between the distribution branch pipe and the delivery branch pipe, and the inner cavity of the delivery branch pipe is a branch pipe delivery cavity. In the direction of the air flowaThe cross-sectional area of the branch distribution cavity of the branch pipe 3 in the section accounts for the cross-sectional area of the branch pipe 3 in the section1/(b-a+1)Wherein, in the step (A),bthe branch pipe end pipe 4 does not need to be divided for the total number of the branch pipes 3, so the sectional area of the branch pipe distribution cavity is the sectional area of the branch pipe end pipe 4.
The air outlet end of the conveying branch pipe is provided with a conical conveying branch pipe butt joint cover with the diameter gradually increasing along the airflow direction, and the output end of the conveying branch pipe butt joint cover is arranged in the air outlet end of the corresponding distribution branch pipe and is in sealing connection with the inner wall of the distribution branch pipe. Conveying branch pipe reinforcing ribs are arranged between the conveying branch pipes and the distributing branch pipes, the conveying branch pipe reinforcing ribs are symmetrically arranged on two sides, the two conveying branch pipe reinforcing ribs are arranged along the axial direction of the conveying branch pipes, the inner sides of the conveying branch pipe reinforcing ribs are fixedly connected with the outer walls of the conveying branch pipes, the outer sides of the conveying branch pipe reinforcing ribs are fixedly connected with the inner walls of the distributing branch pipes, the conveying branch pipe reinforcing ribs can reinforce the conveying branch pipes and the distributing branch pipes, and the conveying branch pipes and the distributing branch pipes can be connected and arranged at intervals. The conveying branch pipes and the corresponding conveying branch pipe butt joint covers are integrally arranged.
The foregoing is directed to preferred embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope of the technical solution of the present invention.
Claims (10)
1. Three-layer hot air distribution pipe, its characterized in that: the device comprises a main pipe (1) and a plurality of branch pipes (3) which are arranged on two sides of the main pipe (1) and communicated with the main pipe (1), wherein the main pipe (1) is provided with a plurality of sections which are sequentially connected end to end, each branch pipe (3) is also provided with a plurality of sections which are sequentially connected end to end, the air outlet end of the main pipe (1) is provided with a main pipe end pipe (2) for sealing the air outlet end, and the air outlet end of each branch pipe (3) is provided with a branch pipe end pipe (4) for sealing the air outlet end;
each section of main pipe (1) comprises a conveying main pipe (6), a pre-distribution main pipe (11) and a distribution main pipe (5) which are sequentially arranged from inside to outside, a main pipe distribution cavity (8) is formed between the distribution main pipe (5) and the pre-distribution main pipe (11), a main pipe pre-distribution cavity (13) is formed between the pre-distribution main pipe (11) and the conveying main pipe (6), the main pipe distribution cavity (8) is communicated with the air inlet end of the corresponding branch pipe (3), the main pipe pre-distribution cavity (13) is communicated with the main pipe distribution cavity (8) of the next section of main pipe (1), and the conveying main pipe (6) is simultaneously communicated with the main pipe pre-distribution cavity (13) and the conveying main pipe (6) of the next section of main pipe (1);
each section of branch pipe (3) comprises a conveying branch pipe and a distribution branch pipe which are sequentially arranged from inside to outside, the air outlet end of the conveying branch pipe is communicated with the conveying branch pipe and the distribution branch pipe of the next section of branch pipe simultaneously, the air inlet ends of the conveying branch pipe and the distribution branch pipe are communicated with the main pipe simultaneously, and the outer wall of the distribution branch pipe is provided with a branch pipe air outlet hole.
2. The tri-layer heated air distribution tube of claim 1, wherein: each section of branch pipe (3) is provided with a pre-distribution branch pipe between a conveying branch pipe and a distribution branch pipe, a branch pipe pre-distribution cavity is formed between the pre-distribution branch pipe and the conveying branch pipe, a branch pipe distribution cavity is formed between the pre-distribution branch pipe and the distribution branch pipe, the branch pipe pre-distribution cavity is communicated with the branch pipe distribution cavity of the next section of branch pipe (3), and the conveying branch pipe is communicated with the branch pipe pre-distribution cavity and the conveying branch pipe of the next section of branch pipe (3) at the same time.
3. The tri-layer heated air distribution tube of claim 2, wherein: the air inlet end of the conveying branch pipe of each section of branch pipe (3) is arranged in the corresponding pre-distribution branch pipe, so that a branch pipe communication cavity for communicating the branch pipe pre-distribution cavity with the conveying branch pipe is formed at the air inlet end of the pre-distribution branch pipe.
4. The tri-layer heated air distribution tube of claim 1, wherein: the air inlet end of the conveying main pipe (6) of each section of main pipe (1) is arranged in the corresponding pre-distribution main pipe (11), so that a main pipe communicating cavity (12) for communicating the main pipe pre-distribution cavity (13) with the conveying main pipe (6) is formed at the air inlet end of the pre-distribution main pipe (11).
5. The tri-layer heated air distribution tube of claim 1, wherein: the diameter of the main conveying pipe (6) is larger than that of the main conveying pipe (6) at the next section.
6. The tri-layer heated air distribution tube of claim 1, wherein: the air outlet end of the pre-distribution main pipe (11) is provided with a pre-distribution main pipe butt joint cover (1101) with the diameter gradually increased along the airflow direction, the pre-distribution main pipe butt joint cover (1101) is communicated with a next main pipe distribution cavity (8), the air outlet end of the conveying main pipe (6) is provided with a conical conveying main pipe butt joint cover (601) with the diameter gradually increased along the airflow direction, and the conveying main pipe butt joint cover (601) is simultaneously communicated with the next main pipe pre-distribution cavity (13) and the conveying main pipe (6).
7. The tri-layer heated air distribution tube of claim 1, wherein: in the direction of the air flowmThe section of the main pipe distribution cavity (8) has the cross-sectional area occupying the cross-sectional area of the main distribution pipe (5)1/(n-m+1)Wherein, in the step (A),nis the total segment number of the main pipe (1).
8. The tri-layer heated air distribution tube of claim 1, wherein: a main pipe butt joint barrel (9) is arranged between every two adjacent main pipes (1), and a branch pipe butt joint barrel is arranged between every two adjacent branch pipes (3).
9. The tri-layer heated air distribution tube of claim 1, wherein: the conveying main pipe (6) and the corresponding pre-distribution main pipe (11) are provided with a conveying main pipe reinforcing rib (10), and the distribution main pipe (5) and the corresponding pre-distribution main pipe (11) are provided with a pre-distribution main pipe reinforcing rib (14).
10. The tri-layer heated air distribution tube of claim 1, wherein: be responsible for end pipe (2) and be one end confined drum, be responsible for the opening end of end pipe (2) and be responsible for the end sealing connection that gives vent to anger of (1), the axial length of being responsible for end pipe (2) equals with the axial length of every section and being responsible for (1), the both sides of being responsible for end pipe (2) also are provided with branch pipe (3) with being responsible for end pipe (2) intercommunication.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810826884.4A CN109114345B (en) | 2018-07-25 | 2018-07-25 | Three-layer hot air distribution pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810826884.4A CN109114345B (en) | 2018-07-25 | 2018-07-25 | Three-layer hot air distribution pipe |
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| CN109114345A CN109114345A (en) | 2019-01-01 |
| CN109114345B true CN109114345B (en) | 2020-04-07 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101413398B (en) * | 2008-11-28 | 2010-12-15 | 山东理工大学 | Heating start-up system of mine ventilation air methane oxidized apparatus |
| CN201811329U (en) * | 2010-01-21 | 2011-04-27 | 刘春杰 | Solar warm air heating system |
| CN101832704A (en) * | 2010-06-09 | 2010-09-15 | 山东天力干燥设备有限公司 | Multi-circular pipe gas distributing chamber and using method thereof |
| JP5647478B2 (en) * | 2010-09-30 | 2014-12-24 | 積水化学工業株式会社 | Double piping structure and joint with suction port used in this structure |
| CN102226487B (en) * | 2011-04-22 | 2012-09-05 | 西安交通大学 | Heat-supply three-layer casing system based on countercurrent heat exchange principle |
| CN203963355U (en) * | 2014-05-23 | 2014-11-26 | 北京航天发射技术研究所 | A kind of new type low temperature vacuum multi-layer insulation abnormity pipeline |
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