External through-flow gas-solid ejector

Abstract

The invention relates to the technical field of gas-solid ejectors, in particular to an external through-flow gas-solid ejector which comprises a gas nozzle. The device further comprises a mixing chamber, a feeding channel, a throat pipe and a diffusion pipe. An inner cavity of the mixing chamber is designed to be of a diffusion-horizontal-convergence structure, materials can be conveyed out of the gas-solid ejector in time, a traditional nozzle built-in mode is improved, the gas nozzle and the mixing chamber are communicated to form an integral structure, and a sealing assembly is arranged on a flange plate, so that the mixing effect is improved. The contraction sealing piece can be rapidly expanded and contracted through adjustment of the control rod, the sealing performance is guaranteed, meanwhile, the problem that a conventional gasket is prone to being lost is effectively solved, a gas-solid injection and communication integrated structure is adopted in the device, ineffective space and a material retention area commonly existing in a traditional gas-solid injector are eliminated, and the service life of the gas-solid injector is prolonged. Not only is the performance of the gas-solid ejector optimized, but also the manufacturing cost and the use cost are remarkably reduced, and the reliability and the durability of equipment are improved.

Description

Technical Field

[0001] The invention relates to the technical field of gas-solid ejectors, and in particular to an external through-flow gas-solid ejector. Background Art

[0002] As a key feeding equipment in the pneumatic conveying system, the gas-solid ejector has the advantages of no moving parts and easy maintenance, and has attracted widespread attention. The gas-solid ejector uses compressed gas as the working medium and granular solids as the conveying medium. It uses the kinetic energy of the high-speed airflow generated by the compressed gas to suspend and accelerate the solid particles and send them into the conveying pipeline. Its usual structure consists of a gas nozzle, a feed channel, a receiving chamber, a mixing tube, a throat and a diffuser. The high-speed flowing gas changes diameter and speeds up at the nozzle, thereby driving the airflow around the receiving chamber to generate negative pressure. The solid material is transported to the receiving chamber through the feeder. The negative pressure generated by the high-speed airflow will mix the solid material with the gas in the mixing chamber, and then accelerate it through the throat and then mix it through the diffuser and transport it to the dosing point.

[0003] However, the gas nozzle of the conventional gas-solid injector is inserted below the feed channel and the receiving chamber, which makes the gas-solid two-phase flow unevenly mixed in the receiving chamber, and some materials will accumulate above the gas nozzle. In the long run, the solid material transportation will be blocked here. Due to the unreasonable built-in structure, not only is its processing cost high, but also the impact wear of some local areas of the injector is aggravated, which can easily cause local wear of the injector. In addition, the gas-solid injector generally uses threaded connection, flange connection, etc. at the inlet to connect the access end with the gas conveying pipeline. In order to enhance the sealing effect of the connection, a sealing gasket is used, but this method is easy to lose the gasket during maintenance, affecting subsequent installation.

[0004] Therefore, in order to solve the problem that the built-in nozzle method of the conventional gas-solid injector is prone to material retention, resulting in channel blockage, and the connection method at the inlet end is inconvenient for maintenance, an external through-flow gas-solid injector can be designed. Summary of the invention

[0005] In order to overcome the problem that the nozzle internal structure of the conventional gas-solid injector is prone to material retention, resulting in channel blockage, and the connection method at the inlet end is inconvenient to maintain.

[0006] The technical solution of the present invention is: an external through-flow gas-solid injector, including a gas nozzle; also including a mixing chamber, a feed channel, a throat, and a diffusion tube. The right side of the gas nozzle is connected to the mixing chamber, the upper end of the mixing chamber is provided with a feed channel, the right side of the mixing chamber is connected to the throat, the end of the throat away from the mixing chamber is provided with a diffusion tube, the left side of the gas nozzle is connected to a first flange, the left side of the first flange is provided with a first sealing assembly, the right side of the diffusion tube is connected to a second flange, the right side of the second flange is provided with a second sealing assembly, and the structure of the first sealing assembly is exactly the same as the structure of the second sealing assembly.

[0007] Preferably, by connecting the gas nozzle and the mixing chamber into an integral structure, the probability of solid particles colliding with the wall of the gas nozzle is reduced, the large-area wear of the wall parts is reduced and the service life of the injector is increased, and the inner cavity of the mixing chamber is designed to be a diffusion-horizontal-convergence structure, which is conducive to timely conveying the material from the gas-solid injector, thereby greatly avoiding the blockage of the channel, and by arranging the first sealing assembly on the first flange, the shrinking seal can be expanded by adjusting the control rod, thereby achieving rapid sealing, which is convenient for staff to perform maintenance. In summary, the invention significantly improves the performance of the gas-solid injector through a series of innovative designs, reduces processing costs and maintenance costs, and improves the stability and reliability of the equipment.

[0008] Preferably, the gas nozzle, the mixing chamber, the throat and the diffuser are coaxial integral structures.

[0009] Preferably, the mixing chamber is composed of a diffusion cone, a horizontal column, and a convergent cone, the diameter of the diffusion cone gradually increases from left to right, the diameter of the convergent cone gradually decreases from left to right, and the feed channel is arranged at the upper end of the horizontal column.

[0010] Preferably, the feed channel is in the shape of an oblique cylinder, with the left wall inclined toward the lower right, and the right wall extending in a direction perpendicular to the horizontal plane.

[0011] Preferably, the diffuser is conical.

[0012] Preferably, the first sealing assembly includes a shrink seal, which is arranged on the left side of the first flange, has a circular ring structure, is made of elastic rubber material, a connecting pipe is fixed on the right side of the shrink seal, and a regulator is provided at one end of the connecting pipe away from the shrink seal.

[0013] Preferably, a folding airbag is provided on the inner side of the regulator, and an auxiliary sheet is fixed in front of the folding airbag.

[0014] Preferably, a threaded hole is provided in front of the regulator, a control rod is connected to the inner side of the threaded hole, and the control rod is threadedly connected to the threaded hole.

[0015] Preferably, a connector is provided at one end of the control rod close to the auxiliary piece, the connector is rotatably connected to a connecting sleeve, and the connecting sleeve is fixed in front of the auxiliary piece.

[0016] The beneficial effects of the present invention are as follows: the external through-flow gas-solid injector is beneficial to the drainage of solid materials through the inclined feed channel, and the inner cavity of the mixing chamber is designed to be a diffusion-horizontal-convergence structure, which is beneficial to timely conveying materials out of the gas-solid injector, avoiding the occasional conveying blockage caused by powder agglomeration generated by long-term retention in the injector when conveying certain moisture-prone powder materials. The traditional nozzle built-in method is also improved, and the gas nozzle and the mixing chamber are connected to form an integral structure, which reduces the probability of solid particles colliding with the wall of the gas nozzle, large-area wear of wall parts and improves the service life of the injector. In addition, by arranging a sealing assembly on the flange, the shrinking seal can be expanded and contracted quickly by adjusting the control rod, which effectively avoids the problem of easy loss of conventional gaskets while ensuring the sealing performance. Compared with the traditional design method, the equipment adopts a gas-solid injection connected and integrated structure, which eliminates the invalid space and material retention area commonly present in traditional gas-solid injectors, not only optimizes the performance of the gas-solid injector, but also significantly reduces the manufacturing cost and use cost, and improves the reliability and durability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the novel three-dimensional structure of the present invention Figure 1 ;

[0018] Figure 2 Schematic diagram of the novel three-dimensional structure of the present invention Figure 2 ;

[0019] Figure 3 It is a schematic diagram of the new cross-sectional three-dimensional structure of the present invention;

[0020] Figure 4 This is a schematic diagram of the cross-sectional three-dimensional structure of the novel gas nozzle of the present invention;

[0021] Figure 5 It is a schematic diagram of a new partially enlarged three-dimensional structure of the present invention.

[0022] Explanation of the reference numerals: 1. gas nozzle; 2. mixing chamber; 3. feed channel; 4. throat; 5. diffuser; 6. first flange; 7. first sealing assembly; 8. second flange; 9. second sealing assembly; 701. shrink seal; 702. connecting pipe; 703. regulator; 704. folded airbag; 705. auxiliary plate; 706. threaded hole; 707. control rod; 708. connector; 709. connecting sleeve. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0024] See also Figure 1-Figure 5 The present invention provides an embodiment: an external through-flow gas-solid ejector, comprising a gas nozzle 1; further comprising a mixing chamber 2, a feed channel 3, a throat 4, and a diffusion tube 5, wherein the right side of the gas nozzle 1 is connected to the mixing chamber 2, the upper end of the mixing chamber 2 is provided with the feed channel 3, the right side of the mixing chamber 2 is connected to the throat 4, the end of the throat 4 away from the mixing chamber 2 is provided with the diffusion tube 5, the left side of the gas nozzle 1 is connected to a first flange 6, the left side of the first flange 6 is provided with a first sealing component 7, the right side of the diffusion tube 5 is connected to a second flange 8, the right side of the second flange 8 is provided with a second sealing component 9. The structure of the first sealing component 7 is exactly the same as that of the second sealing component 9. By connecting the gas nozzle 1 and the mixing chamber 2 into an integral structure, the probability of solid particles colliding with the wall of the gas nozzle 1 is reduced, the large-area wear of the wall parts is reduced, and the service life of the injector is improved. The inner cavity of the mixing chamber 2 is designed to be a diffusion-horizontal-convergence structure, which is conducive to timely conveying the material from the gas-solid injector, thereby greatly avoiding the blockage of the channel. In addition, by arranging the first sealing component 7 on the first flange 6, the connection can be quickly sealed to facilitate maintenance by the staff.

[0025] See also Figure 2-Figure 4 In this embodiment, the gas nozzle 1, the mixing chamber 2, the throat 4 and the diffuser 5 are a coaxial integral structure, and the coaxial integral structure can ensure the smooth flow and mixing of the gas and the substance. The mixing chamber 2 is composed of a diffusion cone, a horizontal cylinder, and a convergent cone. The diameter of the diffusion cone gradually increases from left to right, and the diameter of the convergent cone gradually decreases from left to right. The feed channel 3 is arranged at the upper end of the horizontal cylinder. The diffusion cone helps the diffusion of the gas. The convergent cone can be used to increase the pressure or speed of the mixture. The diffusion-horizontal-convergence structure facilitates the full mixing of the mixed gas and other substances introduced into the feed channel 3. The feed channel 3 is in an oblique cylindrical shape, and the left wall is inclined to the lower right, and the extension direction of the right wall is perpendicular to the horizontal plane. The oblique cylindrical feed channel 3 helps the substance to smoothly enter the mixing chamber 2 and reduces the possibility of blockage. The diffuser 5 is in a conical cylinder shape, and the conical cylinder diffuser 5 helps the diffusion of the mixture.

[0026] See also Figure 4-Figure 5In this embodiment, the first sealing component 7 includes a shrink seal 701, which is arranged on the left side of the first flange 6. The shrink seal 701 is a circular ring structure. The shrink seal 701 is made of elastic rubber. A connecting pipe 702 is fixed to the right side of the shrink seal 701. A regulator 703 is arranged at one end of the connecting pipe 702 away from the shrink seal 701. Through the connection of the shrink seal 701, it is convenient to increase the sealing between the pipeline for conveying gas and the gas nozzle. A folding airbag 704 is arranged on the inner side of the regulator 703. An auxiliary sheet 705 is fixed in front of the folding airbag 704. By folding or stretching the folding airbag 704, it is convenient to input the internal air into it. The seal 701 is contracted or withdrawn, a threaded hole 706 is provided in front of the adjuster 703, and a control rod 707 is connected to the inner side of the threaded hole 706. The control rod 707 is threadedly connected to the threaded hole 706. By rotating the knob on the control rod 707, the control rod 707 can achieve fixed-point rotation, thereby controlling the folding airbag 704. A connector 708 is provided at one end of the control rod 707 close to the auxiliary piece 705. The connector 708 is rotatably connected to a connecting sleeve 709. The connecting sleeve 709 is fixed in front of the auxiliary piece 705. The connector 708 at the end of the control rod 707 is rotated in the connecting sleeve 709 to prevent the auxiliary piece 705 from changing its angle during the forward and backward movement.

[0027] When working, first install the pipe end of the gas to be transported on the left side of the first flange 6, then rotate the control rod 707 in the threaded hole 706, and rotate the connector 708 at the end of the control rod 707 in the connecting sleeve 709, so that the auxiliary plate 705 can move backward, thereby driving the auxiliary plate 705 to compress the folded airbag 704, and then, input the air in the folded airbag 704 into the shrink seal 701 through the connecting pipe 702, so that the shrink seal 701 expands, so as to increase the sealing between the gas conveying pipe and the gas nozzle, and the sealing installation at the connection is completed, and finally, the high-speed flowing gas is input through the gas nozzle 1, and the air flow around the mixing chamber 2 is driven to generate negative pressure by changing the diameter and speed, and the solid material is input into the mixing chamber 2 through the feed channel 3. The negative pressure generated by the high-speed airflow will mix the solid material with the gas in the mixing chamber 2, and finally accelerate through the throat 4 and then output from the diffuser 5.

[0028] Through the above steps, the control rod can be adjusted to expand quickly to ensure the sealing of the connection. The gas nozzle and the mixing chamber are connected to form an integral structure to reduce the probability of solid particles colliding with the wall of the gas nozzle. The inner cavity of the mixing chamber is designed to be a diffusion-horizontal-convergence structure, which is conducive to timely conveying the material from the gas-solid injector to solve the problem that the built-in nozzle method of the conventional gas-solid injector is prone to material retention, resulting in channel blockage, and the connection method at the inlet end is inconvenient to maintain.

[0029] The embodiments of the present invention are described in detail above with reference to 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 those skilled in the art without departing from the spirit of the present invention.

Claims

1. An external through-flow gas-solid ejector, comprising a gas nozzle (1); characterized in that: The gas nozzle (1) further comprises a mixing chamber (2), a feed channel (3), a throat (4), and a diffusion tube (5); the right side of the gas nozzle (1) is connected to the mixing chamber (2); the upper end of the mixing chamber (2) is provided with the feed channel (3); the right side of the mixing chamber (2) is connected to the throat (4); the end of the throat (4) away from the mixing chamber (2) is provided with the diffusion tube (5); the left side of the gas nozzle (1) is connected to a first flange (6); the left side of the first flange (6) is provided with a first sealing assembly (7); the right side of the diffusion tube (5) is connected to a second flange (8); the right side of the second flange (8) is provided with a second sealing assembly (9); the structure of the first sealing assembly (7) is completely the same as the structure of the second sealing assembly (9).

2. The external through-flow gas-solid ejector according to claim 1, characterized in that: The gas nozzle (1), the mixing chamber (2), the throat (4) and the diffusion pipe (5) are a coaxial integral structure.

3. The external through-flow gas-solid ejector according to claim 2, characterized in that: The mixing chamber (2) is composed of a diffusion cone, a horizontal column, and a convergent cone, the diameter of the diffusion cone gradually increases from left to right, and the diameter of the convergent cone gradually decreases from left to right. The feed channel (3) is arranged at the upper end of the horizontal column.

4. The external through-flow gas-solid ejector according to claim 3, characterized in that: The feed channel (3) is in the shape of an oblique cylinder, with the left wall surface inclined toward the lower right, and the right wall surface extending in a direction perpendicular to the horizontal plane.

5. The external through-flow gas-solid ejector according to claim 2, characterized in that: The diffusion tube (5) is in the shape of a cone.

6. The external through-flow gas-solid ejector according to claim 1, characterized in that: The first sealing assembly (7) comprises a shrink seal (701), which is arranged on the left side of the first flange (6), and is of a circular ring structure. The shrink seal (701) is made of elastic rubber material, and a connecting pipe (702) is fixed on the right side of the shrink seal (701). A regulator (703) is arranged at one end of the connecting pipe (702) away from the shrink seal (701).

7. The external through-flow gas-solid ejector according to claim 6, characterized in that: A folding airbag (704) is arranged on the inner side of the regulator (703), and an auxiliary sheet (705) is fixed in front of the folding airbag (704).

8. The external through-flow gas-solid ejector according to claim 7, characterized in that: A threaded hole (706) is provided on the front of the regulator (703), a control rod (707) is connected to the inner side of the threaded hole (706), and the control rod (707) is threadedly connected to the threaded hole (706).

9. The external through-flow gas-solid ejector according to claim 8, characterized in that: A connecting head (708) is provided at one end of the control rod (707) close to the auxiliary plate (705), and the connecting head (708) is rotatably connected to a connecting sleeve (709), and the connecting sleeve (709) is fixed in front of the auxiliary plate (705).

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