Sight glass container for airway test bench

Abstract

The present invention provides a sight glass container for an air passage test bench, which includes a bottom plate and a cover body fixed on the bottom plate. The inner cavity of the cover body is used for arranging a reflecting mirror. A lower ventilation port communicating with the cover body is opened on the bottom plate for connecting a ventilation pipe. An upper ventilation hole is opened on the top wall of the cover body for butt-connecting and installing a simulated cylinder liner. Light-transmitting holes are opened on two adjacent side walls or three side walls of the cover body for sealing and installing a sight glass. This sight glass container facilitates the testing of the air passage flow field characteristics by using the PIV image particle velocimetry technology. Light-transmitting holes for installing the sight glass are opened on all three side walls of the cover body, which facilitates the transmission of light into the cover body and can support various forms of optical path arrangements, so as to photograph different cross-sections of the simulated cylinder liner.

Description

Technical Field

[0001] The invention relates to the technical field of engine cylinder head airway performance testing, and in particular to a sight glass container for an airway test bench. Background Art

[0002] Airway test benches usually use PIV (particle image velocimetry) to test airway flow field characteristics. This technology uses the airway test bench to simulate the intake state of the cylinder head sample, and then uses lasers to generate light sheets and high-speed cameras to shoot the flow field.

[0003] When using 2D-PIV to test the airway flow field characteristics of the engine, it is necessary to use a reflector to reflect the laser light path or the camera light path when shooting the simulated cylinder liner cross section. Therefore, a mirror container for the airway test bench is specially designed. Summary of the invention

[0004] In view of the above, the present invention provides a sight glass container for an airway test bench to support various forms of optical path arrangements, so as to photograph different cross sections of a simulated cylinder liner.

[0005] The technical solution of the present invention:

[0006] The present invention provides a sight glass container for an airway test bench, comprising a bottom plate and a cover body fixed on the bottom plate, wherein the inner cavity of the cover body is used for arranging a reflector, a lower air vent connected to the cover body is provided on the bottom plate for connecting a ventilation pipe, an upper air vent is provided on the top wall of the cover body for docking and installing a simulated cylinder sleeve, and light-transmitting holes are provided on two adjacent side walls or three side walls of the cover body for sealing and installing a sight glass.

[0007] Furthermore, it also includes a movable door installed on the side wall of the cover body, the movable door and the viewing mirror are respectively located on different side walls of the cover body, and a door hole is opened on the side wall of the cover body where the movable door is installed, and the movable door is sealed inside.

[0008] Furthermore, it also includes a square flange, which is sealed and fixed to the side wall of the cover body and surrounds the door opening. The outer surface of the square flange is provided with a sealing groove adapted to the movable door for inserting a sealing ring. The movable door is fixed to the outer surface of the square flange by bolts to seal the door opening.

[0009] Furthermore, the movable door is hinged to the door opening of the side wall of the cover body, and the movable door is locked to the door opening by a locking device to achieve sealing.

[0010] Furthermore, the cover body adopts a rectangular parallelepiped shell structure, and the rectangular parallelepiped shell structure has four side walls.

[0011] Furthermore, it also includes an inner flange, which is fixed to the light-transmitting hole of the side wall of the cover body.

[0012] Furthermore, the outer surface of the inner flange is provided with a mounting groove adapted to the sight glass, a sealing ring is provided in the mounting groove, the sight glass is placed on the sealing ring in the mounting groove, and a sealing ring is provided on the outer surface of the sight glass to seal and fix the sight glass through the outer flange.

[0013] Furthermore, the inner flange is circular.

[0014] Furthermore, it also includes a top flange, which is fixed to the upper vent hole of the top wall of the cover body to be fixedly connected to the bottom end of the simulated cylinder sleeve by bolts.

[0015] Furthermore, a sealing groove is provided on the upper surface of the top flange for inserting a sealing ring to achieve sealing at the connection between the simulated cylinder liner and the top flange.

[0016] Beneficial effects of the present invention:

[0017] The sight glass container is provided with a structure matching a bottom plate and a cover body fixed on the bottom plate, and a lower air vent connected to the cover body is provided on the bottom plate. The lower air vent is connected to a vent pipe to draw air into the cover body. An upper air vent is provided on the top wall of the cover body, and a simulated cylinder liner can be installed in the upper air vent. By fixing a cylinder head sample on the top of the simulated cylinder liner and inputting tracer particles, it is convenient to use PIV image particle velocimetry technology to test the airway flow field characteristics. Light-transmitting holes for the installation of sight glasses are provided on the three side walls of the cover body, which facilitates the transmission of light into the cover body, and can support various forms of light path arrangements, so as to shoot different cross sections of the simulated cylinder liner.

[0018] The preferred embodiments of the present invention and their beneficial effects will be further described in detail in conjunction with specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention, but should not constitute a limitation of the present invention.

[0020] Figure 1 A stereoscopic view of the airway test bench mirror device of the present invention;

[0021] Figure 2 A top view of the airway test bench mirror device of the present invention;

[0022] Figure 3 It is a cross-sectional schematic diagram of the airway test bench mirror device of the present invention;

[0023] Figure 4 A first-view stereoscopic view of a mirror container of the airway test bench mirror device of the present invention;

[0024] Figure 5A second perspective stereoscopic image of the mirror container of the airway test bench mirror device of the present invention;

[0025] Figure 6 A structural diagram of a reflector adjustment assembly and a bracket of an airway test bench mirror device of the present invention;

[0026] Figure 7 It is a schematic structural diagram of a first use state of the engine cylinder head airway testing system of the present invention;

[0027] Figure 8 It is a schematic structural diagram of the second use state of the engine cylinder head airway testing system of the present invention.

[0028] Description of the accompanying figures: cylinder head sample 10, base 1, mirror container 2, ventilation pipe 3, simulated cylinder sleeve 4, mirror 5, reflector 6, bottom plate 21, cover body 22, lower vent 211, upper vent 221, light transmission hole 222, movable door 23, door opening 223, square flange 24, inner flange 25, outer flange 26, top flange 27, flange part 31, cone 32, connecting pipe 33, metal cylinder sleeve 41, transparent cylinder sleeve 42, reflector adjustment Section assembly 7, bracket 8, rotation displacement stage 71, inclination displacement stage 72, magnetic table stand 73, fixed block 81, movable block 82, clamping plate 83, adjusting bolt 84, tilting block 85, base plate 11, supporting foot 12, ventilation groove 13, tracer particle generator 20, tracer particle input tube 30, fan 40, voltage stabilizer 50, exhaust pipe 60, laser 70, camera 80, control valve 301, pressure gauge 601, pressure regulating valve 602. DETAILED DESCRIPTION

[0029] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0030] See also Figures 1 to 3 The present invention provides an airway test bench mirror device for measuring the airway performance of a cylinder head sample 10. The airway test bench mirror device includes a base 1, a mirror container 2, a vent pipe 3, a simulated cylinder sleeve 4, a mirror 5 and a reflector 6. The mirror container 2 is fixed on the base 1, one end of the vent pipe 3 is connected to the bottom surface of the base 1 and communicated with the inner cavity of the mirror container 2, and the other end of the vent pipe 3 is an exhaust end. One end of the simulated cylinder sleeve 4 is connected to the top wall of the mirror container 2 and communicated with the inner cavity of the mirror container 2, and the other end of the simulated cylinder sleeve 4 is used to fix the cylinder head sample 10 and input tracer particles. The simulated cylinder sleeve 4 has light transmittance for shooting axial sections at different positions. Three mirrors 5 are respectively installed on the three side walls of the mirror container 2 so that light can pass through the mirror 5 and enter the mirror container 2. The reflector 6 can be installed in the mirror container 2 in an adjustable position to reflect the light passing through each mirror 5.

[0031] The airway test bench mirror device of the present invention adopts a mirror 5 installed on each of the three side walls of the mirror container 2, and a reflector 6 with adjustable position is arranged obliquely in the mirror container 2. A sheet light source generated by laser can be used to horizontally transmit a mirror 5, and the sheet light source is reflected upward into the simulated cylinder liner 4 through the reflector 6, so that a sheet light source can be formed in the axial section of the simulated cylinder liner 4, and the camera can be focused on the axial section to shoot, thereby shooting an axial section of the simulated cylinder liner 4. Then, the reflector 6 is adjusted to face the mirror 5 of the adjacent side wall, so that the reflector 6 corresponds to the position of the mirror 5 of the adjacent side wall, and the sheet light source generated by laser is used to horizontally transmit the mirror 5, and the sheet light source is reflected upward into the simulated cylinder liner 4 through the reflector 6, so that a sheet light source can be formed in the axial section of the simulated cylinder liner 4, and the camera can be focused on the axial section to shoot, thereby shooting another axial section of the simulated cylinder liner 4. In addition, a laser is used to generate a light sheet that transmits the simulated cylinder liner 4 in parallel with the horizontal plane to illuminate the cross section of the simulated cylinder liner 4. A camera is used to align with the corresponding mirror 5. The light path of the camera passes through the mirror 5 and then through the reflector 6 to shoot the cross section of the simulated cylinder liner 4. In this way, the shooting of two axial sections and one cross section of the simulated cylinder liner 4 is realized, which improves the convenience and accuracy of shooting different sections of the airway test bench.

[0032] The airway test bench viewing mirror device of the present invention can be placed on the same horizontal plane as the laser and the camera, thereby avoiding unnecessary errors and improving the test accuracy.

[0033] The airway test bench mirror device of the present invention is introduced for the first time below the cylinder head sample 10, which is conducive to the miniaturization of the airway test bench main body and can be placed directly on the test bench surface. Both the laser and the camera can be placed on the same test bench surface without the need for separate arrangements, thereby improving the convenience of installation and arrangement.

[0034] The main purpose of testing the engine cylinder head sample on the airway test bench is to evaluate the airway performance, and one of the parameters for evaluating the performance is the tumble ratio. Tumble is induced by the airway shape and the combustion chamber shape during the engine intake stroke. During the airway test bench test, it should be ensured that fully developed turbulence is generated in the simulated cylinder sleeve 4, the flow field state of the real engine intake stroke is restored, and the Euler method is used to study the motion law of fluid particles located at different spatial points in the flow field. The present invention adopts the method of evacuating air from the bottom end of the simulated cylinder sleeve 4 by the sight glass container 2, and the flow velocity of the flow field below the simulated cylinder sleeve 4 is uniform, which can meet the test requirements, is conducive to improving the test accuracy, and effectively avoids the existing solution (Announcement No. CN110108493B) using the exhaust hole on the side of the bottom of the transparent cylinder, which causes the flow velocity of the transparent cylinder close to the exhaust side to be inconsistent with the flow velocity on the other side, which interferes with the original tumble.

[0035] In this embodiment, in order to place the laser and the camera more flexibly during actual use, three mirrors 5 are arranged on the mirror container 2, but it is not limited to this. In other embodiments, the mirror container 2 may be arranged with two mirrors 5, and the two mirrors 5 are respectively located on two adjacent side walls of the mirror container 2.

[0036] See also Figures 3 to 5 In this embodiment, the sight glass container 2 includes a bottom plate 21 and a cover body 22 fixed on the bottom plate 21. The inner cavity of the cover body 22 is used to arrange the reflector 6. The bottom plate 21 is provided with a lower vent 211 connected to the cover body 22 for connecting the vent pipe 3. The top wall of the cover body 22 is provided with an upper vent hole 221 for docking and installing the simulated cylinder sleeve 4. The three side walls of the cover body 22 are provided with light-transmitting holes 222 for sealing and installing the sight glass 5. It can be understood that light-transmitting holes 222 can also be provided on two adjacent side walls of the cover body 22.

[0037] The sight glass container 2 is provided with a structure matching a bottom plate 21 and a cover body 22 fixed on the bottom plate 21, and a lower vent 211 connected to the cover body 22 is provided on the bottom plate 21. The ventilation pipe 3 is connected through the lower vent 211, and air can be drawn into the cover body 22. An upper vent hole 221 is provided on the top wall of the cover body 22, and the upper vent hole 221 can be docked and installed with a simulated cylinder sleeve 4. By fixing the cylinder head sample 10 on the top of the simulated cylinder sleeve 4 and inputting tracer particles, it is convenient to use PIV image particle velocimetry technology to test the airway flow field characteristics. Light-transmitting holes 222 for the sight glass 5 to be installed are provided on the three side walls of the cover body 22, which facilitates the transmission of light into the cover body 22, and can support various forms of light path arrangements, so as to shoot different cross sections of the simulated cylinder sleeve 4.

[0038] In this embodiment, the mirror container 2 also includes a movable door 23 installed on the side wall of the cover body 22, the movable door 23 and the mirror 5 are respectively located on different side walls of the cover body 22, and a door hole 223 is opened on the side wall of the cover body 22 where the movable door 23 is installed, and the movable door 23 is sealed and installed inside. In this way, the movable door 23 can be removed and the door hole 223 can be opened, which is convenient for the installation and debugging of the reflector 6 and the cleaning and wiping of the mirror 5. Preferably, the mirror container 2 also includes a square flange 24, which is sealed and fixed to the side wall of the cover body 22 and enclosed around the door hole 223. The outer surface of the square flange 24 is provided with a sealing groove adapted to the movable door 23 for inserting a sealing ring, and the movable door 23 is fixed to the outer surface of the square flange 24 by bolts to block the door hole 223. The square flange 24 and the movable door 23 are connected by bolts, which has the advantages of simple structure, high structural strength, good sealing performance, and durability, and is adapted to the purpose of the present invention. It is understandable that the movable door 23 can also be hinged to the door opening 223 of the side wall of the cover body 22, and the movable door 23 can be locked to the door opening 223 by a locking device to achieve sealing.

[0039] In this embodiment, the cover body 22 adopts a rectangular shell structure, and the rectangular shell structure has four side walls, so that it is convenient to arrange three mirrors 5 and a movable door 23 accordingly, and has the advantages of simple structure and easy manufacturing.

[0040] In this embodiment, in order to facilitate the sealing and fixing of the sight glass 5, the sight glass container 2 also includes an inner flange 25, the inner flange 25 is fixed at the light transmission hole 222 of the side wall of the cover body 22, the outer surface of the inner flange 25 is provided with a mounting groove adapted to the sight glass 5, a sealing ring is provided in the mounting groove, the sight glass 5 is placed on the sealing ring in the mounting groove, and the outer surface of the sight glass 5 is provided with a sealing ring, so as to seal and fix the sight glass 5 through the outer flange 26. In this way, the sight glass 5 can be sealed and protected, and uneven force can be applied when fixing the sight glass 5 to avoid cracking. In this embodiment, the sight glass 5 and the inner flange 25 are both circular, which is convenient for installation and fixing, but it is not limited to this. The sight glass 5 and the inner flange 25 can also be square or polygonal.

[0041] In this embodiment, in order to facilitate the sealing and fixing of the simulated cylinder liner 4, the mirror container 2 also includes a top flange 27, which is fixed to the upper vent hole 221 of the top wall of the cover body 22, so as to be fixedly connected with the bottom end of the simulated cylinder liner 4 by bolts. The upper surface of the top flange 27 is provided with a sealing groove adapted to the bottom end of the simulated cylinder liner 4, so as to allow a sealing ring to be placed therein to achieve sealing at the connection between the simulated cylinder liner 4 and the top flange 27.

[0042] In this embodiment, a plurality of connection holes are formed on the bottom plate 21 so as to be fixedly connected to the base 1 by bolts.

[0043] In this embodiment, the vent pipe 3 is arranged coaxially with the simulated cylinder sleeve 4, which is conducive to the uniformity of the flow velocity of the flow field below the simulated cylinder sleeve 4, can better meet the test requirements, and further improve the test accuracy. The vent pipe 3 includes a flange portion 31, a cone 32 and a connecting pipe 33 which are connected in sequence. The flange portion 31 is fixed to the bottom surface of the base 1, and a sealing member is sandwiched between the flange portion 31 and the base 1. The end of the cone 32 with a larger outer diameter is connected to the flange portion 31, and the end of the cone 32 with a smaller outer diameter is connected to one end of the connecting pipe 33. The other end of the connecting pipe 33 is an exhaust end. The vent pipe 3 adopts a structure in which the flange portion 31, the cone 32 and the connecting pipe 33 are connected in an integrated manner. The structure is simple and easy to install and fix. The cone 32 is conducive to fully and evenly sucking the mirror container 2, further improving the uniformity of the flow velocity of the flow field below the simulated cylinder sleeve 4, better meeting the test requirements, and further improving the test accuracy.

[0044] See also Figure 3 and Figure 4In this embodiment, the simulated cylinder sleeve 4 includes a metal cylinder sleeve 41 and a transparent cylinder sleeve 42. The bottom end of the metal cylinder sleeve 41 is detachably mounted on the top wall of the sight glass container 2 and is connected to the upper vent hole 221 of the cover body 22. The bottom end of the transparent cylinder sleeve 42 is sealed and mounted on the top of the metal cylinder sleeve 41. The top of the transparent cylinder sleeve 42 is used to fix the cylinder head sample 10 and input tracer particles. Since the metal cylinder sleeve 41 is detachable, the simulated cylinder sleeve 4 of different cylinder diameters and lengths can be matched according to the cylinder head sample 10 to meet the testing requirements of different cylinder head samples, and can cover the cylinder heads of gasoline engines, diesel engines, etc., thereby solving the problem that the cylinder diameter and length of the glass cylinder barrel in the existing patent solution cannot be changed.

[0045] The metal cylinder sleeve 41 includes an integrally connected bottom flange and a sleeve. The bottom flange is installed on the top flange 27 of the sight glass container 2 by bolt sealing. The end of the sleeve close to the transparent cylinder sleeve 42 has a pressure sensor interface for installing a pressure sensor, thereby facilitating pressure monitoring.

[0046] It can be understood that the simulated cylinder sleeve 4 is not limited to the above structure. For example, the simulated cylinder sleeve 4 can also be directly connected to the top wall of the sight glass container 2 using a glass tube.

[0047] See also Figure 3 and Figure 6 In this embodiment, the airway test bench mirror device further includes a reflector adjustment assembly 7 and a bracket 8 for adjusting the rotation angle and the tilt angle. The reflector adjustment assembly 7 is mounted on the base 1 and is located at the center of the mirror container 2. The bracket 8 is mounted on the reflector adjustment assembly 7. The reflector 6 is tiltedly mounted on the bracket 8. The rotation angle is adjusted by the reflector adjustment assembly 7 so that the reflector 6 on the bracket 8 faces the mirror 5 at different positions. The tilt angle is adjusted by the reflector adjustment assembly 7 so that the reflector 6 on the bracket 8 is adjusted to a tilt angle of 45 degrees.

[0048] In this embodiment, the reflector adjustment assembly 7 includes a rotation displacement table 71 and an inclination displacement table 72. The rotation displacement table 71 is installed on the base 1 and is located at the center of the mirror container 2. The rotation axis of the rotation displacement table 71 coincides with the vertical center axis of the mirror container 2. The inclination displacement table 72 is installed on the rotating movable end of the rotation displacement table 71. The bracket 8 is installed on the inclination movable end of the inclination displacement table 72 to adjust the inclination angle of the reflector 6 on the bracket 8. The rotation displacement table 71 and the inclination displacement table 72 are both existing accessories that can be purchased directly, and their structures and principles are not repeated here. The rotation displacement table 71 and the inclination displacement table 72 can both be adjusted automatically or manually. In order to facilitate assembly and position adjustment, the reflector adjustment assembly 7 also includes a magnetic table base 73, which is installed between the base 1 and the rotation displacement table 71. The magnetic table base 73 is an existing accessory that can be purchased directly, and its structure and principle are not repeated here.

[0049] In this embodiment, the bracket 8 includes a fixed block 81, a movable block 82, a clamping plate 83, an adjusting bolt 84 and a tilting block 85. The fixed block 81 and the movable block 82 are arranged in parallel on the tilting displacement platform 72. The fixed block 81 is fixed on the tilting displacement platform 72. The movable block 82 is slidably arranged on the tilting displacement platform 72. The fixed block 81 and the movable block 82 are both equipped with a clamping plate 83. The adjusting bolt 84 is horizontally penetrated through the fixed block 81 and the movable block 82. One end of the adjusting bolt 84 is rotatably connected to the fixed block 81, and the other end of the adjusting bolt 84 is screwed to the movable block 82. Rotating the adjusting bolt 84 can drive the two clamping plates 83 to move closer or farther away. The tilting block 85 is clamped between the two clamping plates 83, and the reflector 6 is fixed on the inclined surface of the tilting block 85. The bracket 8 adopting the above structural design has a simple structure, convenient installation, and is easy to realize the tilting arrangement of the reflector 6.

[0050] See also Figures 1 to 3 In this embodiment, the base 1 includes a base plate 11 and support legs 12. The base plate 11 is fixed on the bottom plate 21 of the mirror container 2. A ventilation groove 13 is provided in the area of ​​the base plate 11 located inside the mirror container 2 to connect the mirror container 2 and the ventilation pipe 3. Four support legs 12 are respectively installed at the four corners of the base plate 11 so as to be adjustable in height. The support legs 12 can adjust the overall height and levelness of the mirror container 2 within a certain range. Different cylinder head samples 10 have different cylinder diameters and thicknesses, and need to match simulated cylinder sleeves 4 of different cylinder diameters and lengths. When the cylinder head sample 10 is fixed, centered and pressed, it is necessary to leave a certain margin of adjustment range for the height of the simulated cylinder sleeve 4. Preferably, a lifting lug is provided on the base plate 11 to facilitate lifting during installation.

[0051] See also Figure 7 The present invention provides an engine cylinder head airway test system using the above-mentioned airway test bench mirror device, including the airway test bench mirror device, a tracer particle generator 20, a tracer particle input pipe 30, a blower 40, a voltage regulator 50 and an exhaust pipe 60. The cylinder head sample 10 is fixed to the top of the simulated cylinder liner 4. The tracer particle generator 20 passes through the cylinder head sample 10 through the tracer particle input pipe 30 to communicate with the simulated cylinder liner 4 so as to input tracer particles into the simulated cylinder liner 4. The blower 40 and the voltage regulator 50 are connected to the vent pipe 3 through the exhaust pipe 60 in turn to suck the mirror container 2 and the simulated cylinder liner 4 to form a stable airflow. When the tracer particle generator 20 and the blower 40 are working, when the mirror container 2 and the simulated cylinder liner 4 form a stable airflow, a laser 70 can be used to generate a light source, and a camera 80 can be used to shoot to obtain the flow field information formed by the cylinder head sample 10 in the simulated cylinder liner 4.

[0052] When photographing the cross section of the simulated cylinder liner 4, the laser 70 is horizontally arranged at the periphery of the simulated cylinder liner 4, and the laser 70 generates a light source that is transmitted through the simulated cylinder liner 4 in a direction parallel to the horizontal plane to illuminate the cross section of the simulated cylinder liner 4. The camera 80 is arranged at the mirror 5 corresponding to the light reflected by the reflector 6 to take pictures. The light path of the camera 80 passes through the mirror 5 and then through the reflector 6 to photograph the cross section of the simulated cylinder liner 4.

[0053] See also Figure 8 When photographing two axial sections of the simulated cylinder liner 4, the laser 70 is arranged at the mirror 5 corresponding to the light reflected by the reflector 6, and the sheet light source generated by the laser 70 horizontally transmits the mirror 5, and the sheet light source is reflected upward into the simulated cylinder liner 4 through the reflector 6, forming a sheet light source in the axial section of the simulated cylinder liner 4. The camera 80 is arranged at the periphery of the simulated cylinder liner 4, focusing on the axial section for photographing, thereby photographing an axial section of the simulated cylinder liner 4. Then, the reflector 6 is adjusted to face the mirror 5 of the adjacent side wall, so that the position of the reflector 6 corresponds to the mirror 5 of the adjacent side wall, and another axial section of the simulated cylinder liner 4 is photographed in the same way.

[0054] In this embodiment, a control valve 301 is also provided on the tracer particle input pipe 30 to control the flow rate of the tracer particles. A pressure gauge 601 and a pressure regulating valve 602 are arranged in sequence along the suction direction on the exhaust pipe 60 between the ventilation pipe 3 and the regulator 50 to monitor and adjust the pressure.

[0055] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper" and "lower" is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention 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 of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying importance; the words "bottom surface" and "top surface", "inside" and "outside" refer to the geometric direction toward or away from a specific component, respectively.

[0056] 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 a connection between the inside of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0057] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sight glass container (2) for an airway test bench, It is characterized in that The invention comprises a bottom plate (21) and a cover body (22) fixed on the bottom plate (21), wherein the inner cavity of the cover body (22) is used to arrange a reflector (6), the bottom plate (21) is provided with a lower vent (211) connected to the cover body (22) for connecting a vent pipe (3), the top wall of the cover body (22) is provided with an upper vent hole (221) for docking and mounting a simulated cylinder sleeve (4), two adjacent side walls or three side walls of the cover body (22) are provided with light-transmitting holes (222) for sealing and mounting a sight glass (5), and the reflector (6) is provided with a lower vent hole (211) connected to the cover body (22) for connecting a vent pipe (3), and the top wall of the cover body (22) is provided with an upper vent hole (221) for docking and mounting a simulated cylinder sleeve (4). The mirror (6) is installed in the mirror container (2) in an adjustable position to reflect light passing through each mirror (5). The simulated cylinder sleeve (4) includes a metal cylinder sleeve (41) and a transparent cylinder sleeve (42). The bottom end of the metal cylinder sleeve (41) is detachably installed on the top wall of the mirror container (2) and is connected to the upper vent (221) of the cover body (22). The bottom end of the transparent cylinder sleeve (42) is sealed and installed on the top end of the metal cylinder sleeve (41). The top end of the transparent cylinder sleeve (42) is used to fix the cylinder cover sample (10) and input tracer particles.

2. The sight glass container (2) for an airway test bench according to claim 1, It is characterized in that It also includes a movable door (23) mounted on the side wall of the cover body (22), the movable door (23) and the viewing mirror (5) are respectively located on different side walls of the cover body (22), and a door hole (223) is opened on the side wall of the cover body (22) on which the movable door (23) is mounted, and the movable door (23) is sealed inside.

3. The sight glass container (2) for an airway test bench according to claim 2, It is characterized in that The housing also includes a square flange (24) which is sealed and fixed to the side wall of the housing (22) and surrounds the door opening (223). The outer surface of the square flange (24) is provided with a sealing groove which matches the movable door (23) for inserting a sealing ring. The movable door (23) is fixed to the outer surface of the square flange (24) by bolts to block the door opening (223).

4. The sight glass container (2) for an airway test bench according to claim 2, It is characterized in that The movable door (23) is hinged to a door opening (223) on the side wall of the cover body (22), and the movable door (23) is locked to the door opening (223) by a locking device to achieve sealing.

5. The sight glass container (2) for an airway test bench according to claim 1, It is characterized in that The cover body (22) adopts a rectangular parallelepiped shell structure, and the rectangular parallelepiped shell structure has four side walls.

6. The sight glass container (2) for an airway test bench according to claim 1, It is characterized in that It also includes an inner flange (25), which is fixed to the light-transmitting hole (222) on the side wall of the cover body (22).

7. The sight glass container (2) for an airway test bench according to claim 6, It is characterized in that The outer surface of the inner flange (25) is provided with a mounting groove matched with the sight glass (5), a sealing ring is provided in the mounting groove, the sight glass (5) is placed on the sealing ring in the mounting groove, and the outer surface of the sight glass (5) is provided with a sealing ring so as to seal and fix the sight glass (5) through the outer flange (26).

8. The sight glass container (2) for an airway test bench according to claim 6, It is characterized in that The inner flange (25) is circular.

9. The sight glass container (2) for an airway test bench according to claim 6, It is characterized in that It also includes a top flange (27), which is fixed to an upper vent hole (221) on the top wall of the cover body (22) so as to be fixedly connected to the bottom end of the simulated cylinder sleeve (4) by bolts.

10. The sight glass container (2) for an airway test bench according to claim 9, It is characterized in that The upper surface of the top flange (27) is provided with a sealing groove for inserting a sealing ring to achieve sealing at the connection between the simulated cylinder sleeve (4) and the top flange (27).

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