Air inlet flow dividing structure capable of achieving multi-channel uniform flow dividing

Abstract

The utility model relates to an air inlet shunting structure capable of realizing multichannel uniform shunting, and belongs to the technical field of heat exchanger design. The device comprises a flange plate, a connecting pipe, an outer pipe, an inner pipe and a shunt pipe, the flange plate is connected with the connecting pipe; the lower portion of the outer pipe is provided with an outer pipe opening position used for being connected with the connecting pipe, the upper side of the outer pipe is provided with an outer pipe opening area, a row of outer pipe air outlet small holes are formed in the outer pipe opening area, and each outer pipe air outlet small hole is connected with a flow dividing pipe. An inner pipe opening position is arranged on the lower portion of the inner pipe and used for being connected with the connecting pipe, an inner pipe opening area is arranged on the side face of the inner pipe, and a row of inner pipe air outlet small holes are formed in the inner pipe opening area. According to the utility model, the air outlet is uniform, and the air outlet flow velocity consistency in the width direction is improved.

Description

Technical Field

[0001] The utility model relates to an air intake shunting structure for realizing multi-channel uniform shunting, in particular to a novel air intake device for an atmosphere furnace to ensure multi-channel air intake uniformity, belonging to the technical field of heat exchanger design. Background Art

[0002] For products with high requirements for atmosphere consistency, it is necessary to ensure the uniformity and consistency of atmosphere and flow rate during sintering, otherwise the consistency of the sintered products will be poor. In order to increase production output and reduce production costs, it is often preferred to use a furnace with a large box size to sinter the products. However, if the sintering furnace is too large, it is often difficult to ensure the uniformity of the inlet flow rate at each point, which to a certain extent limits the loading capacity of the sintered products and increases the production cost of the products.

[0003] In the prior art, air intake is generally a single or multiple air intake pipes that directly enter the furnace. A single air intake pipe has an uneven atmosphere inside the furnace. Multiple air intake pipes are generally divided into more than one branch, and the outlet flow velocity and flow rate of the multiple outlets are often uneven, with large differences in flow rate. The flow rate close to the air intake pipe is often larger, and the flow rate far from the air intake pipe is smaller, which leads to inconsistencies in products at different positions after sintering. The more outlet branches and the larger the width of the air intake device, the more obvious the difference in flow rate at each outlet position. Summary of the invention

[0004] The technical problem to be solved by the utility model is: the utility model provides an air intake diversion structure for realizing multi-channel uniform diversion, the purpose of which is to solve the problem of uneven air outlets at multiple air outlets and effectively realize uniform air intake at each point.

[0005] The technical solution of the utility model is: an air intake splitter structure for realizing multi-channel uniform splitting, comprising a flange 1, a connecting pipe 2, an outer pipe 3, an inner pipe 4, and a splitter pipe 6;

[0006] The flange 1 is connected with the connecting pipe 2;

[0007] The outer tube 3 has an outer tube opening position 8 at the lower part thereof, which is used to be connected with the connecting tube 2. The outer tube 3 has an outer tube opening area 12 at the upper side thereof, and a row of outer tube air outlet holes 13 are formed in the outer tube opening area 12, and each outer tube air outlet hole 13 is connected to a shunt pipe 6;

[0008] The inner tube 4 has an inner tube opening position 9 at the bottom thereof for connecting with the connecting tube 2. The inner tube 4 has an inner tube opening area 10 on the side thereof. A row of inner tube air outlet holes 11 are formed in the inner tube opening area 10.

[0009] As a further solution of the utility model, a step is left at the junction of the flange 1 and the connecting pipe 2, which is a welding area 14.

[0010] As a further solution of the utility model, both ends of the outer tube 3 and the inner tube 4 are respectively connected with sealing plate plugs 5.

[0011] As a further solution of the utility model, the inner tube 4 and the outer tube 3 are square tubes, round tubes or rectangular tubes.

[0012] As a further solution of the utility model, the outer tube air outlet holes 13 are evenly arranged on the outer tube opening area 12, and the inner tube air outlet holes 11 are evenly arranged on the inner tube opening area 10.

[0013] The beneficial effects of the utility model are as follows: the utility model has a reasonable structural design. When air is inhaled, the atmosphere flows into the inner tube from the flange air inlet. The inner tube has a row of small holes. As the aperture becomes smaller, the airflow velocity increases and the pressure decreases, so that the gas flows out evenly from the small holes in the inner tube. According to the momentum theorem and Bernoulli's equation, the airflow with a sudden increase in velocity impacts the inner wall of the outer tube and rebounds. The rebound must have speed and momentum, so that the atmosphere is fully dispersed and evenly fills the entire inner cavity of the outer tube. The small holes in the outer tube further homogenize the gas, so that the gas is further homogenized when it flows out from the small holes in the outer tube. The structure of the utility model has been verified by flow field simulation and product testing for gas outlet uniformity, and the flow velocity error of each diversion pipe outlet does not exceed 5%; the utility model solves the problem of uneven gas outlet of multiple gas outlets, effectively realizes uniform gas intake at each point, and thus can improve product sintering consistency and increase production output. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the axonometric view of the air intake splitter structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the intake air splitting structure for realizing multi-channel uniform splitting of the utility model;

[0016] Figure 3 It is a partial structural schematic diagram of the utility model.

[0017] Figure 1-3 The numbers in it are: 1-flange, 2-connecting pipe, 3-outer pipe, 4-inner pipe, 5-sealing plate plug, 6-diverter pipe, 7-air inlet, 8-outer pipe opening position, 9-inner pipe opening position, 10-inner pipe opening area, 11-inner pipe air outlet hole, 12-outer pipe opening area, 13-outer pipe air outlet hole, 14-welding area. DETAILED DESCRIPTION

[0018] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0019] Example 1: Figure 1-Figure 3 As shown, an intake air splitting structure for realizing multi-channel uniform splitting includes a flange 1, a connecting pipe 2, an outer pipe 3, an inner pipe 4, and a splitting pipe 6;

[0020] The flange 1 is connected with the connecting pipe 2;

[0021] The outer tube 3 has an outer tube opening position 8 at the lower part thereof, which is used to be connected with the connecting tube 2. The outer tube 3 has an outer tube opening area 12 at the upper side thereof, and a row of outer tube air outlet holes 13 are formed in the outer tube opening area 12, and each outer tube air outlet hole 13 is connected to a shunt pipe 6;

[0022] The inner tube 4 has an inner tube opening position 9 at the bottom thereof for connecting with the connecting tube 2. The inner tube 4 has an inner tube opening area 10 on the side thereof. A row of inner tube air outlet holes 11 are formed in the inner tube opening area 10.

[0023] As a further solution of the utility model, a step is left at the junction of the flange 1 and the connecting pipe 2, which is a welding area 14.

[0024] As a further solution of the utility model, both ends of the outer tube 3 and the inner tube 4 are respectively connected with sealing plate plugs 5.

[0025] As a further solution of the utility model, the inner tube 4 and the outer tube 3 are square tubes, round tubes or rectangular tubes.

[0026] As a further solution of the utility model, the outer tube air outlet holes 13 are evenly arranged on the outer tube opening area 12, and the inner tube air outlet holes 11 are evenly arranged on the inner tube opening area 10.

[0027] When the utility model is working, according to the above structure, after the intake air enters from the air inlet 7 of the flange 1 port, it enters along the connecting pipe 2, first flows through the inner tube 4, flows out from the single row of inner tube air outlet holes 11 opened in the inner tube 4, blows to the inner wall surface of the outer tube 3, flows into the inner chamber of the outer tube 3, so that the gas is evenly dispersed, and then flows out from a row of outer tube air outlet holes 13 and the diverter pipe 6, further making the outlet gas uniform and improving the consistency of the outlet gas flow rate in the width direction.

[0028] When the air is inlet, the atmosphere flows into the inner tube 4 from the air inlet 7 of the flange 1. The inner tube 4 has a row of inner tube outlet holes 11. As the aperture becomes smaller, the airflow velocity increases and the pressure decreases, so that the gas flows out evenly from the inner tube outlet holes 11. According to the momentum theorem and Bernoulli's equation, the airflow with a sudden increase in velocity impacts the inner wall of the outer tube and rebounds. The rebound must have speed and momentum, so that the atmosphere is fully dispersed and evenly fills the entire outer tube cavity. The outer tube outlet holes 13 further homogenize the gas, so that the gas is further homogenized when it flows out from the outer tube outlet holes 13. Furthermore, the structure of the utility model has been verified by flow field simulation and product testing for gas outlet uniformity, and the velocity error of each diversion pipe outlet does not exceed 5%. The structure of the utility model has achieved very good results.

[0029] The specific embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. An air intake splitting structure for realizing multi-channel uniform splitting, characterized in that: It comprises a flange (1), a connecting pipe (2), an outer pipe (3), an inner pipe (4), and a diverter pipe (6); The flange (1) is connected to the connecting pipe (2); The outer tube (3) has an outer tube opening position (8) at the lower part thereof for connecting with the connecting tube (2); the outer tube (3) has an outer tube opening area (12) at the upper side thereof; a row of outer tube air outlet holes (13) is formed in the outer tube opening area (12); each outer tube air outlet hole (13) is connected to a shunt tube (6); The inner tube (4) has an inner tube opening position (9) at the bottom thereof for connecting with the connecting tube (2). The inner tube (4) has an inner tube opening area (10) on the side thereof, and a row of inner tube air outlet holes (11) is formed in the inner tube opening area (10).

2. The air intake splitting structure for realizing multi-channel uniform splitting according to claim 1, characterized in that: A step is left at the junction of the flange (1) and the connecting pipe (2), which is a welding area (14).

3. The air intake splitting structure for realizing multi-channel uniform splitting according to claim 1, characterized in that: Both ends of the outer tube (3) and the inner tube (4) are respectively connected with sealing plate plugs (5).

4. The air intake splitting structure for realizing multi-channel uniform splitting according to claim 1, characterized in that: The inner tube (4) and the outer tube (3) are square tubes, round tubes or rectangular tubes.

5. The air intake splitting structure for realizing multi-channel uniform splitting according to claim 1, characterized in that: The outer tube air outlet holes (13) are evenly arranged on the outer tube opening area (12), and the inner tube air outlet holes (11) are evenly arranged on the inner tube opening area (10).

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