Shell structure for mounting dirt separation net

Abstract

The shell structure comprises an upper outer shell, a lower inner shell and a lower outer shell, the upper outer shell, the lower inner shell and the lower outer shell are each of a tubular structure with one open end and one closed end, the opening of the upper outer shell and the opening of the lower outer shell are mutually spliced and connected, a liquid outlet groove is formed in the side wall of the upper outer shell, and a liquid inlet groove is formed in the side wall of the lower outer shell. The lower inner shell is located in the lower outer shell and fixedly connected with the lower outer shell, a liquid passing channel is reserved between the lower inner shell and the lower outer shell, and an inner protrusion and a plurality of spiral liquid inlets are arranged at the bottom of the lower inner shell. An inner bulge and a spiral liquid inlet are arranged and are matched with a plurality of turns, so that the flowing path of dirt particles driven by airflow is increased, the flowing speed is slowed down, and the filtering effect of an inner filter screen on the dirt particles in the airflow is enhanced; and the special structure of the spiral liquid inlet can enable the airflow entering the lower inner shell to drive the dirt particles to rotate, so that the filtering effect of the internal filter screen on the dirt particles in the airflow is further improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of dirt isolation nets, in particular to a shell structure for installing a dirt isolation net. Background Art

[0002] The separator is a component of the aircraft sewage tank, located at the top of the sewage tank. When the passengers on the plane use the vacuum toilet, they press the flush button to flush the dirt into the sewage tank through the sewage pipe. Generally, when the aircraft is flying at high altitude, the pressure difference between the inside and outside of the aircraft will be used to flush the dirt in the vacuum toilet into the sewage tank. In this process, paper scraps and part of the dirt and sewage will be dispersed into smaller dirt particles by the high-speed airflow, and the dirt particles will flow with the airflow. When on the ground and at low altitude, a vacuum blower will be used to generate a pressure difference. When the dirt is flushed into the sewage tank, the larger dirt solids and sewage at the entrance will settle into the sewage tank under the action of gravity. At the same time, the airflow mixed with dirt particles will pass through the separator and be discharged outside the aircraft.

[0003] The dirt screen is the core component of the separator, which is mainly used to isolate the dirt particles in the gas discharged to the outside of the aircraft to prevent them from being directly discharged outside the aircraft. Therefore, the dirt screen must not only have a filtering function, but also be able to withstand the impact of the airflow. If the dirt screen fails, the dirt particles will be discharged to the outside of the aircraft with the airflow, and residues will remain on the outer surface of the aircraft, which will not only affect the cleanliness of the aircraft, but also corrode the aircraft body, posing a safety hazard.

[0004] However, the existing dirt-isolating net has a poor filtering effect and is difficult to completely filter the dirt particles in the airflow. Therefore, we need to design a shell structure for installing the dirt-isolating net to solve these problems. Utility Model Content

[0005] The problem to be solved by the utility model is to provide a shell structure for installing a dirt isolation net.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0007] A shell structure for installing a dirt-screen, comprising an upper outer shell, a lower inner shell and a lower outer shell, wherein the upper outer shell, the lower inner shell and the lower outer shell are all tubular structures with one end open and the other end closed, the openings of the upper outer shell and the lower outer shell are spliced ​​and connected to each other, a liquid outlet groove is provided on the side wall of the upper outer shell, and a liquid inlet groove is provided on the side wall of the lower outer shell, the lower inner shell is located in the lower outer shell and is fixedly connected to the lower outer shell, a liquid passage is reserved between the lower inner shell and the lower outer shell, an inner protrusion and a plurality of spiral liquid inlets are provided at the bottom of the lower inner shell, the inner protrusion is located at the center of the bottom of the lower inner shell, the inner protrusion is hemispherical and protrudes toward the inner side of the lower inner shell, and the plurality of spiral liquid inlets are evenly distributed circumferentially around the inner protrusion.

[0008] Preferably, the spiral liquid inlet is a non-equilateral trapezoidal structure.

[0009] Such an arrangement can make the spiral liquid inlet form a structure with one side larger and the other side smaller, so that the airflow passing through the two sides of the spiral liquid inlet drives the dirt particles at different flow rates, thereby allowing the dirt particles entering the lower inner shell to rotate.

[0010] Preferably, the liquid inlet groove is close to the connection between the upper shell and the lower shell, and the liquid outlet groove is close to the connection between the upper shell and the lower shell.

[0011] Such an arrangement can increase the flow of dirt particles and improve the filtering effect.

[0012] Preferably, an upper flange is provided on the opening of the upper outer shell, an upper sealing plate is provided on the upper flange, a lower flange is provided at the opening of the lower outer shell, a connecting ring plate is provided at the opening of the lower inner shell, the lower inner shell is connected to the lower outer shell via the connecting ring plate and the lower flange, a lower sealing plate is also provided on the connecting ring plate, and the lower inner shell is connected to the lower outer shell via the lower sealing plate and the upper sealing plate.

[0013] Such an arrangement ensures the connection effect and facilitates installation and disassembly.

[0014] Preferably, the outer diameters of the upper flange, the lower flange and the connecting ring plate are the same.

[0015] Such arrangement makes the overall structure more beautiful.

[0016] Preferably, the upper sealing plate and the lower sealing plate are both annular, and the inner diameter of the upper sealing plate does not exceed the inner diameter of the upper outer shell, the outer diameter of the upper sealing plate is the same as the outer diameter of the upper flange, the inner diameter of the lower sealing plate does not exceed the inner diameter of the lower inner shell, and the outer diameter of the lower sealing plate is the same as the outer diameter of the connecting ring plate.

[0017] With such arrangement, the dirt-isolating net between the lower inner shell and the upper outer shell can be installed.

[0018] Preferably, a sealing gasket is further provided between the upper sealing plate and the lower sealing plate.

[0019] This arrangement ensures a sealing effect.

[0020] The advantages and positive effects of the utility model are:

[0021] The utility model arranges a lower inner shell in a lower outer shell, arranges an inner protrusion and a spiral liquid inlet at the bottom of the lower inner shell, and arranges the liquid inlet on the lower outer shell near the connection between the upper outer shell and the lower outer shell, so that dirt particles can be driven by airflow to enter between the lower outer shell and the lower inner shell from the liquid inlet groove, and then enter the lower inner shell through the spiral liquid inlet, and finally flow out from the liquid outlet groove on the upper outer shell. By arranging a plurality of turning points, the flow path of the dirt particles driven by the airflow is increased, the flow rate is slowed down, and the filtering effect of the internal filter screen on the dirt particles is enhanced; and the spiral liquid inlet with a non-equilateral quadrilateral structure can make the airflow entering the lower inner shell drive the dirt particles to rotate, further improving the filtering effect of the internal filter screen on the dirt particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0023] Figure 1 It is a schematic diagram of the exploded structure of the utility model;

[0024] Figure 2 It is a cross-sectional view of the assembly structure of the utility model;

[0025] Figure 3 It is a structural schematic diagram of the spiral liquid inlet of the utility model.

[0026] The following are the descriptions of the reference numerals:

[0027] 1. Upper outer shell; 2. Upper sealing plate; 3. Sealing gasket; 4. Lower sealing plate; 5. Lower inner shell; 6. Lower outer shell; 7. Liquid outlet groove; 8. Liquid inlet groove; 9. Spiral liquid inlet; 10. Inner protrusion; 11. Upper flange; 12. Lower flange; 13. Connecting ring plate; 14. Liquid passage. DETAILED DESCRIPTION

[0028] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, 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 therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0030] The utility model is further described below in conjunction with the accompanying drawings:

[0031] Example 1: Figure 1-Figure 3 As shown, a shell structure for installing a dirt-isolating net comprises an upper outer shell 1, a lower inner shell 5 and a lower outer shell 6. The upper outer shell 1, the lower inner shell 5 and the lower outer shell 6 are all tubular structures with one end open and the other end closed. The openings of the upper outer shell 1 and the lower outer shell 6 are spliced ​​and connected to each other. A liquid outlet groove 7 is provided on the side wall of the upper outer shell 1, and a liquid inlet groove 8 is provided on the side wall of the lower outer shell 6. The lower inner shell 5 is located in the lower outer shell 6 and is fixedly connected to the lower outer shell 6. A liquid passage 14 is reserved between the lower inner shell 5 and the lower outer shell 6. An inner protrusion 10 and a plurality of spiral liquid inlets 9 are provided at the bottom of the lower inner shell 5. The inner protrusion 10 is located at the center of the bottom of the lower inner shell 5. The inner protrusion 10 is hemispherical and protrudes toward the inner side of the lower inner shell 5. A plurality of spiral liquid inlets 9 are evenly distributed around the inner protrusion 10.

[0032] Preferably, the spiral liquid inlet 9 is a non-equilateral trapezoidal structure. Such a configuration can make the spiral liquid inlet 9 form a structure with one side larger and the other side smaller, so that the air flow rate passing through the two sides of the spiral liquid inlet 9 is different, and the air flow rate will be different. It will shift from the low flow rate area to the high flow rate area, thereby causing the air flow entering the lower inner shell 5 to rotate, thereby driving the dirt particles to rotate.

[0033] Preferably, the liquid inlet groove 8 is close to the connection between the upper shell 1 and the lower shell 6, and the liquid outlet groove 7 is close to the connection between the upper shell 1 and the lower shell 6. Such an arrangement can increase the travel of the dirt particles driven by the airflow and improve the filtering effect.

[0034] Preferably, an upper flange 11 is provided on the opening of the upper outer shell 1, an upper sealing plate 2 is provided on the upper flange 11, a lower flange 12 is provided at the opening of the lower outer shell 6, a connecting ring plate 13 is provided at the opening of the lower inner shell 5, the lower inner shell 5 is connected to the lower outer shell 6 through the connecting ring plate 13 and the lower flange 12, a lower sealing plate 4 is also provided on the connecting ring plate 13, the lower inner shell 5 is connected to the lower outer shell 6 through the lower sealing plate 4 and the upper sealing plate 2, such a configuration ensures the connection effect and is convenient for installation and disassembly.

[0035] Preferably, the outer diameters of the upper flange 11, the lower flange 12 and the connecting ring plate 13 are the same, and such an arrangement makes the overall structure more beautiful.

[0036] Preferably, the upper sealing plate 2 and the lower sealing plate 4 are both annular, and the inner diameter of the upper sealing plate 2 does not exceed the inner diameter of the upper outer shell 1, the outer diameter of the upper sealing plate 2 is the same as the outer diameter of the upper flange 11, the inner diameter of the lower sealing plate 4 does not exceed the inner diameter of the lower inner shell 5, and the outer diameter of the lower sealing plate 4 is the same as the outer diameter of the connecting ring plate 13. Such a setting can install the dirt isolation net between the lower inner shell 5 and the upper outer shell 1.

[0037] Preferably, a sealing gasket 3 is further provided between the upper sealing plate 2 and the lower sealing plate 4, such a configuration ensures a sealing effect.

[0038] The working process of this embodiment is as follows: first, the lower outer shell 6 and the lower inner shell 5 are connected by connecting the ring plate 13 and the lower flange 12, and then the lower sealing plate 4 is installed on the connecting ring plate 13, and then the upper sealing plate 2 is installed on the upper flange 11, and then the filter screen is installed between the upper outer shell 1 and the lower inner shell 5, and finally the upper outer shell 1 is connected with the lower outer shell 6 and the lower inner shell 5 by using the upper sealing plate 2 and the lower sealing plate 4, and when connecting the upper sealing plate 2 and the lower sealing plate 4, a sealing gasket 3 made of collodion needs to be arranged between the upper sealing plate 2 and the lower sealing plate 4 to ensure the sealing effect, and then the device is installed on the top of the aircraft sewage tank, and the lower outer shell 6 is kept at the bottom during installation. When working, the aircraft will use the pressure difference between the inside and the outside to flush the dirt in the vacuum toilet into the sewage tank. In this process, paper scraps and part of the dirt and sewage will be dispersed into smaller dirt particles by the high-speed airflow, and the dirt The particles will flow with the air flow, causing the dirt particles to flow from the liquid inlet groove 8 into the liquid passage 14 between the lower outer shell 6 and the lower inner shell 5, and then the dirt particles will flow along the liquid passage 14 and flow into the lower inner shell 5 from the spiral liquid inlet 9. Since the structure of the spiral liquid inlet 9 is a non-equilateral quadrilateral, one side of the spiral liquid inlet 9 is larger than the other side, and the air flow rate flowing in from the spiral liquid inlet 9 on the side with the smaller opening is greater than the air flow rate on the side with the larger opening. When the air flow rates are different, they will shift from the bottom flow rate area to the high flow rate area. Therefore, the air flow flowing in through the spiral liquid inlet 9 will rotate, thereby driving the dirt particles in the air flow to rotate. At the same time, since the inner protrusion 10 is protruding toward the inside of the lower inner shell 5, the sewage will rotate along the lower inner shell 5 after entering the lower inner shell 5, so as to improve the filtering effect of the dirt net in the lower inner shell 5 on the dirt particles in the air flow.

[0039] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A housing structure for installing a dirt-isolating net, characterized in that: The invention comprises an upper outer shell (1), a lower inner shell (5) and a lower outer shell (6); the upper outer shell (1), the lower inner shell (5) and the lower outer shell (6) are all tubular structures with one end open and the other end closed; the openings of the upper outer shell (1) and the lower outer shell (6) are spliced ​​and connected to each other; a liquid outlet groove (7) is provided on the side wall of the upper outer shell (1); a liquid inlet groove (8) is provided on the side wall of the lower outer shell (6); the lower inner shell (5) is located inside the lower outer shell (6) and is in contact with the liquid inlet groove (8); The lower outer shell (6) is fixedly connected, and a liquid passage (14) is reserved between the lower inner shell (5) and the lower outer shell (6). The bottom of the lower inner shell (5) is provided with an inner protrusion (10) and a plurality of spiral liquid inlets (9). The inner protrusion (10) is located at the center of the bottom of the lower inner shell (5). The inner protrusion (10) is hemispherical and protrudes toward the inner side of the lower inner shell (5). The plurality of spiral liquid inlets (9) are evenly distributed around the inner protrusion (10).

2. A housing structure for installing a dirt-isolating net according to claim 1, characterized in that: The liquid inlet groove (8) is close to the connection between the upper shell (1) and the lower shell (6), and the liquid outlet groove (7) is close to the connection between the upper shell (1) and the lower shell (6).

3. The housing structure for installing a dirt-isolating net according to claim 1, characterized in that: An upper flange (11) is arranged on the opening of the upper outer shell (1), an upper sealing plate (2) is arranged on the upper flange (11), a lower flange (12) is arranged on the opening of the lower outer shell (6), a connecting ring plate (13) is arranged on the opening of the lower inner shell (5), the lower inner shell (5) and the lower outer shell (6) are connected via the connecting ring plate (13) and the lower flange (12), a lower sealing plate (4) is also arranged on the connecting ring plate (13), and the lower inner shell (5) and the lower outer shell (6) are connected via the lower sealing plate (4) and the upper sealing plate (2).

4. A housing structure for installing a dirt-isolating net according to claim 3, characterized in that: The upper flange (11), the lower flange (12) and the connecting ring plate (13) have the same outer diameter.

5. A housing structure for installing a dirt-isolating net according to claim 4, characterized in that: The upper seal The plate (2) and the lower sealing plate (4) are both annular, and the inner diameter of the upper sealing plate (2) does not exceed the inner diameter of the upper outer shell (1), the outer diameter of the upper sealing plate (2) is the same as the outer diameter of the upper flange (11), the inner diameter of the lower sealing plate (4) does not exceed the inner diameter of the lower inner shell (5), and the outer diameter of the lower sealing plate (4) is the same as the outer diameter of the connecting ring plate (13).

6. The housing structure for installing a dirt-isolating net according to claim 4, characterized in that: A sealing gasket (3) is also provided between the upper sealing plate (2) and the lower sealing plate (4).

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