Combined injection device

Abstract

The utility model provides a combined type injection device which comprises a shell and at least two injection units arranged on the air outlet side of the shell, and the adjacent injection units are arranged in parallel or at an angle. The shell is further provided with a high-pressure gas inlet connector, the high-pressure gas inlet connector is connected with a high-pressure gas inlet pipe arranged in the shell, all the injection units are connected to the high-pressure gas inlet pipe through respective gas inlet branch pipes, high-pressure gas enters the injection units through pipelines, and the high-pressure gas is output after being mixed with normal-pressure air in cavities in the injection units and pressurized. The multiple injection units are mainly integrated in the shell, high-pressure air is supplied to all the injection units through the mutually independent high-pressure air inlet branch pipes, conveying efficiency is ensured, multi-angle full-range air flow output is achieved, and therefore the air supply effect or the dust falling effect is achieved, and the air supply device has the advantages of being simple in structure, easy to maintain, low in cost and the like. The energy conversion efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of ejector applications, and more particularly, to a combined ejector device. Background Art

[0002] An ejector transfers the kinetic energy of the ejecting air flow to the entrained air flow in the mixing area where the ejecting air flow and the entrained air flow come into contact with each other by using the turbulence effect, thereby increasing the total pressure of the entrained air flow. In current engineering applications, ejectors usually adopt a large-scale integrated structure design. The air flow enters the ejector from the air inlet, is mixed and pressurized in the internal cavity, and then the pressurized air flow is discharged in a single direction. However, this design results in a single air flow direction and a relatively limited coverage range.

[0003] In order to meet the requirements of more application scenarios and achieve the air supply effect of multi-angle and wide coverage, in the prior art, the cavity structure of the ejector has been optimized. For example, multiple cavities are combined together to increase the air supply volume. However, although this combined design has improved the air supply volume, it still faces the problems of large volume and limited air supply coverage. Especially after expanding the diffusion angle of the air outlet, the air flow often converges towards the middle, affecting the air supply effect.

[0004] Currently, the above defects can be solved by a design scheme in which multiple ejector units are integrated into one device. The multiple ejector units are arranged at multiple angles, which can not only achieve a wider air supply coverage range, but also optimize the air flow distribution through the synergistic effect of the ejector units, reduce the air flow aggregation phenomenon in the middle area, and thus improve the overall air supply efficiency and effect. However, this integrated ejector device also has problems such as low high-pressure gas transmission efficiency, poor airtightness of the device, and high processing difficulty. Therefore, it is necessary to further optimize its structure and propose a combined ejector device with a new structure. Summary of the Utility Model

[0005] In view of the above technical problems, a combined ejector device is provided. The utility model mainly adopts a scheme in which multiple ejector units are integrated at an angle in a housing, and high-pressure gas is supplied to each ejector unit through independent high-pressure gas inlet branch pipes to ensure the transmission efficiency; at the same time, according to the needs of the use scenario, a spray device is selected to be added to achieve multi-angle and full-range air flow output, so as to achieve the air supply effect or the dust reduction effect, and has the advantages of simple structure, easy maintenance, high energy conversion efficiency, etc.

[0006] The technical means adopted by the utility model are as follows:

[0007] A combined ejector device includes a housing and an ejector unit provided on the air outlet side of the housing. At least two ejector units are provided, and adjacent ejector units are arranged in parallel or at an angle to each other; a high-pressure gas inlet interface is further provided on the housing, and the high-pressure gas inlet interface is connected to a high-pressure gas inlet pipe provided inside the housing. Each ejector unit is connected to the high-pressure gas inlet pipe through its own intake branch pipe. High-pressure gas enters the ejector unit through the pipeline, mixes with atmospheric air in the cavity inside the ejector unit, and is pressurized and then output.

[0008] Further, the housing has a hollow structure, and an installation and hoisting component is provided on the housing or on the side of the housing; an ejector unit fixing plate and an inner layer fixing plate are provided on the air outlet side of the housing, which are respectively used to fix the front end and the tail end of the ejector unit.

[0009] Further, the parallel arrangement or angular arrangement between adjacent ejector units means that the central axes of the respective ejector units are parallel to each other or intersect at a point inside the housing.

[0010] Further, a nozzle for spraying water mist is provided in the middle or rear part of the housing, and the position of the nozzle is set so that the sprayed water mist evenly covers the inlet of each ejector unit; the nozzle is connected to a water inlet pipe through a water inlet branch pipe, and the water inlet pipe is connected to a water inlet interface provided on one side of the housing.

[0011] Further, the chambers where the high-pressure gas inlet pipe and the water inlet pipe are located inside the housing are independent of each other.

[0012] Further, the ejector unit includes:

[0013] An outer cylinder, with an intake cavity at the front end, and an air inlet for introducing high-pressure gas is provided on the outer wall of the middle cavity section;

[0014] An inner cylinder, having a gradually expanding inner cavity structure, the inner cylinder is coaxial and communicated with the cavity of the outer cylinder, there is a gap between the front end of the inner cylinder and the end of the intake cavity of the outer cylinder, and a space for accommodating high-pressure gas is formed between the outer side of the middle region of the inner cylinder and the middle cavity section of the outer cylinder;

[0015] The outer cylinder is sleeved outside the inner cylinder and fixed to the inner cylinder. High-pressure gas enters through the air inlet, mixes with atmospheric air entering through the intake cavity of the outer cylinder after passing through the gap between the front end of the inner cylinder and the end of the intake cavity of the outer cylinder, and is ejected and output together.

[0016] Further, the intake cavity at the front end of the outer cylinder is straight or gradually tapered, the front end of the intake cavity is fixed to the inner layer fixing plate, the tail end of the outer cylinder is thread-sealed and fixed to the inner cylinder, and the tail end of the inner cylinder is fixed to the ejector unit fixing plate through a locking member.

[0017] Furthermore, the air inlet on the outer wall of the middle cavity section of the outer cylinder is connected to the intake branch pipe for introducing high-pressure gas and is sealed and fixed.

[0018] Compared with the prior art, the utility model has the following advantages:

[0019] 1. The device provided by the utility model integrates multiple ejector units in a single housing and supplies high-pressure air flow to each ejector unit through independent high-pressure air intake branch pipes, making full use of the efficiency of high-pressure gas.

[0020] 2. The ejector units provided by the utility model are arranged in parallel or at an angle according to the scenario requirements. During the air flow output process, a fan-shaped air flow, a conical air flow, or other air flow forms matching the use area can be formed, so as to flexibly adjust the dust suppression coverage range.

[0021] 3. The housing structure provided by the utility model can be adjusted according to the actual working conditions, with no limit on the form; a spray device can also be set according to the use conditions, and the chambers where the high-pressure air inlet pipe and the water inlet pipe are located are independent of each other, adapting to different use environments and requirements, improving the adaptability, safety, and operation efficiency of the device, and being convenient for maintenance.

[0022] In summary, the combined ejector device applying the utility model can flexibly design the combination form of ejector units according to the dust suppression requirements of the actual situation, match the dust suppression area range, and achieve the dust suppression effect of multi-angle full coverage. The overall structure of the device is compact, greatly reducing the size of the device in the prior art, with simple assembly, convenient maintenance, and strong practicability.

[0023] For the above reasons, the utility model can be widely promoted in the application field of ejectors. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for describing the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0025] Figure 1 It is a schematic structural diagram of a combined ejector device in Embodiment 1 of the present utility model.

[0026] Figure 2 It is an internal structural schematic diagram of a combined ejector device in Embodiment 1 of the present utility model.

[0027] Figure 3 It is a top view of the bottom structure of a combined ejector device in Embodiment 1 of the present utility model.

[0028] Figure 4 This is a schematic structural diagram of a combined ejector device in Embodiment 2 of the present utility model.

[0029] Figure 5 This is a schematic internal structure diagram of a combined ejector device in Embodiment 2 of the present utility model.

[0030] Figure 6 This is a schematic cross-sectional structure diagram of a combined ejector device in Embodiment 2 of the present utility model.

[0031] Figure 7 This is a schematic structural diagram of a combined ejector device in Embodiment 3 of the present utility model.

[0032] Figure 8 This is a schematic structural diagram of a combined ejector device in Embodiment 4 of the present utility model.

[0033] In the figure: 1. housing; 11. upper cover; 12. side plate; 13. ejector unit fixing plate; 14. mounting hole; 15. partition plate; 16. lifting plate; 17. inner housing; 2. ejector unit; 21. outer cylinder; 22. inner cylinder; 23. locking member; 24. intake cavity; 25. gap; 26. intake port; 3. water inlet interface; 31. water inlet pipe; 32. water inlet branch pipe; 33. nozzle; 4. high-pressure gas intake interface; 41. high-pressure gas inlet pipe; 42. intake branch pipe; 43. high-pressure gas cavity. Detailed implementation manners

[0034] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. In the description of the embodiments of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "connection" and "installation" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. In addition, "communication" can be a direct communication or an indirect communication through an intermediate medium. Among them, "fixation" means that they are connected to each other and the relative position relationship after connection remains unchanged. The orientation terms mentioned in the embodiments of the present utility model, such as "inside", "outside", "top", "bottom", etc., are only with reference to the direction of the accompanying drawings. Therefore, the orientation terms used are for better and clearer description and understanding of the embodiments of the present utility model, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the scope of protection of the present utility model.

[0035] Embodiment 1

[0036] As Figure 1 shown, a combined ejector device provided by the present utility model includes a housing 1 and three ejector units 2 provided on the air outlet side of the housing 1. The housing 1 has a hollow structure, which is a rectangular structure in this embodiment, and includes an upper cover 11, two oppositely arranged side plates 12, a bottom plate, and an ejector unit fixing plate 13 corresponding to the three ejector units 2 on the air outlet side. The part where the top ends of the side plates 12 protrude from the upper cover 11 forms an installation and lifting component, and an installation hole 14 for lifting is provided thereon.

[0037] An inner fixing plate (not shown in the reference numeral, as Figure 3 shown) is further provided inside the ejector unit fixing plate 13 on the air outlet side of the housing 1, and is in the form of a double-layer plate for fixing the front end and the tail end of the ejector unit 2 respectively. The adjacent ejector units 2 are arranged at an angle, that is, the central axes of the respective ejector units 2 are arranged at an angle and intersect at a point inside the housing 1.

[0038] A high-pressure gas inlet interface 4 is further provided on the side plate 12 of the housing 1. The high-pressure gas inlet interface 4 is connected to a high-pressure gas inlet pipe 41 provided inside the housing 1. Each ejector unit 2 is connected to the high-pressure gas inlet pipe 41 through its own intake branch pipe 42. High-pressure gas enters the ejector unit 2 through the pipeline, and is mixed with atmospheric air and pressurized in the cavity inside the ejector unit 2 and then output.

[0039] Specifically, the ejector unit 2 (as Figure 6 shown) includes:

[0040] An outer cylinder 21, with an intake cavity 24 at the front end, and an air inlet 26 for introducing high-pressure gas is provided on the outer wall of the middle cavity section; the intake cavity 24 at the front end of the outer cylinder 21 is of a straight cylinder type or a tapered type, and the front end of the intake cavity 24 is fixed to the inner layer fixing plate;

[0041] An inner cylinder 22, having a gradually expanding inner cavity structure, the inner cylinder 22 is coaxial and communicated with the chamber of the outer cylinder 21, a gap 25 is provided between the front end of the inner cylinder 22 and the end of the intake cavity 24 of the outer cylinder 21, and a space for accommodating high-pressure gas is formed between the outer side of the middle region of the inner cylinder 22 and the middle cavity section of the outer cylinder 21;

[0042] The outer cylinder 21 is sleeved outside the inner cylinder 22 and is thread-sealed and fixed to the inner cylinder 22. The tail end of the inner cylinder 22 is fixed to the ejector unit fixing plate 13 through a locking member 23. The air inlet 26 on the outer wall of the middle cavity section of the outer cylinder 21 is connected to the intake branch pipe 42 for introducing high-pressure gas, and the connection is sealed and fixed. A sealing ring can be provided at the connection position between the outer cylinder 21 and the inner cylinder 22 for further sealing.

[0043] During operation, high-pressure gas enters the ejector unit 2 through the air inlet 26, and after being mixed with the atmospheric air entering through the intake cavity 24 of the outer cylinder 21 through the gap 25 between the front end of the inner cylinder 22 and the end of the intake cavity 24 of the outer cylinder 21, they are pressurized and ejected together.

[0044] As a preferred dust reduction solution, as Figure 2 shown, a nozzle 33 for spraying water mist is provided in the middle or rear part of the housing 1. The position of the nozzle 33 is set so that the sprayed water mist evenly covers the inlet of each ejector unit 2, that is, the nozzle 33 can be set in the area where the intersection of the central axes of the ejector units 2 is located. With this design, the airflow with water mist forms a fan-shaped water mist after being ejected, and the water mist can further achieve the purpose of dust reduction. Specifically, the nozzle 33 is connected to the water inlet pipe 31 through a water inlet branch pipe 32. The water inlet pipe 31 is connected to a water inlet interface 3 provided on one side of the housing 1. The water inlet interface 3 and the high-pressure gas inlet interface 4 are provided on the same side plate 12 for easy installation.

[0045] A partition 15 is further provided in the housing 1 to separate the chamber where the high-pressure gas inlet pipe 41 and the water inlet pipe 31 are located, making them independent of each other, and making it easier to troubleshoot and maintain the device.

[0046] Embodiment 2

[0047] As Figure 4As shown in the figure, this is another combined ejector device provided by the present utility model. The difference from Embodiment 1 is that in this structure, the housing 1 is a cylindrical hollow structure. Similarly, a structure form with three ejector units 2 is adopted, and the corresponding ejector unit fixing plate 13 is a sector plate for fixing the ejector unit 2. On the housing 1, two lifting plates 16 are provided for lifting the entire structure.

[0048] As Figure 5 shown, it can be seen that in this structure, by providing an inner housing 17 connected to the inner fixing plate, the chambers where the high-pressure gas inlet pipe 41 and the water inlet pipe 31 are located are separated from each other. In the structure of the cylindrical housing 1, in order to optimize the structural design, the high-pressure gas inlet pipe 41 is arranged as an annular structure conforming to the shape of the housing 1. The high-pressure gas inlet pipe 41 is equivalent to being sleeved outside the inner housing 17. High-pressure gas enters through the high-pressure gas inlet interface 4, forms a high-pressure gas chamber 43 in the high-pressure gas inlet pipe 41, and then is connected to the respective ejector units 2 through the intake branch pipes 42, ensuring the transportation efficiency of the high-pressure gas.

[0049] The water inlet interface 3 is connected to the water inlet pipe 31 and is arranged at the rear side of the high-pressure gas inlet interface 4. The water inlet branch pipe 32 connected to the water inlet pipe 31 extends into the inner housing 11. Similarly, the spraying range of the nozzle 33 covers the intake ends of the respective ejector units 2, and the entire device combines to output a conical airflow coverage area with diffused sprayed water mist.

[0050] Embodiment 3

[0051] As Figure 7 shown, on the basis of Embodiment 2, a form integrating six ejector units 2 is adopted, so that the coverage area of the conical airflow in a diffused shape is wider and more uniform.

[0052] Embodiment 4

[0053] As Figure 8 shown, on the basis of Embodiment 1, a form integrating five ejector units 2 is adopted, so that the coverage area of the fan-shaped airflow in a diffused shape is wider and more uniform.

[0054] The above embodiments are only preferred embodiments of the present utility model and are not used to limit the present utility model; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A combined ejector device, comprising a housing and an ejector unit arranged on the air outlet side of the housing, characterized in that, At least two ejector units are provided, and adjacent ejector units are arranged in parallel or at an angle to each other; a high-pressure gas inlet interface is further provided on the housing, and the high-pressure gas inlet interface is connected to a high-pressure gas inlet pipe arranged inside the housing. Each ejector unit is connected to the high-pressure gas inlet pipe through its own intake branch pipe. High-pressure gas enters the ejector unit through the pipeline, mixes with atmospheric air in the cavity inside the ejector unit, and is pressurized and then output.

2. The combined ejector device according to claim 1, characterized in that, The housing has a hollow structure, and an installation and lifting component is provided on the housing or on the side of the housing; an ejector unit fixing plate and an inner layer fixing plate are provided on the air outlet side of the housing, which are respectively used to fix the front end and the tail end of the ejector unit.

3. The combined ejector device according to claim 2, wherein, The parallel arrangement or angular arrangement between adjacent ejector units means that the central axes of the respective ejector units are parallel to each other or intersect at a point inside the housing.

4. The combined ejector device according to claim 3, characterized in that, A nozzle for spraying water mist is provided in the middle or rear part of the housing, and the position of the nozzle is set so that the sprayed water mist evenly covers the inlet of each ejector unit; the nozzle is connected to a water inlet pipe through a water inlet branch pipe, and the water inlet pipe is connected to a water inlet interface provided on one side of the housing.

5. The combined ejector device according to claim 4, characterized in that, The chambers where the high-pressure gas inlet pipe and the water inlet pipe are located inside the housing are independent of each other.

6. The combined ejector device according to claim 2, wherein, The ejector unit includes: An outer cylinder, with an intake cavity at the front end, and an air inlet for introducing high-pressure gas is provided on the outer wall of the middle cavity section; An inner cylinder, having a gradually expanding inner cavity structure, the inner cylinder is coaxial and connected with the cavity of the outer cylinder, a gap is provided between the front end of the inner cylinder and the end of the intake cavity of the outer cylinder, and a space for accommodating high-pressure gas is formed between the outer side of the middle region of the inner cylinder and the middle cavity section of the outer cylinder; The outer cylinder is sleeved outside the inner cylinder and fixed to the inner cylinder. High-pressure gas enters through the air inlet, mixes with atmospheric air entering through the intake cavity of the outer cylinder after passing through the gap between the front end of the inner cylinder and the end of the intake cavity of the outer cylinder, and is ejected and output together.

7. The combined ejector device according to claim 6, characterized in that, The intake cavity at the front end of the outer cylinder is a straight cylinder type or a gradually shrinking type. The front end of the intake cavity is fixed to the inner layer fixing plate. The tail end of the outer cylinder is fixedly sealed with the inner cylinder by threads, and the tail end of the inner cylinder is fixed to the ejector unit fixing plate through a locking member.

8. The combined ejector device according to claim 7, wherein, The air inlet on the outer wall of the middle cavity section of the outer cylinder is connected to the intake branch pipe for introducing high-pressure gas and is fixedly sealed.

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