Hood pipeline exhaust system

Abstract

The utility model provides a hood pipeline exhaust system, which relates to the technical field of exhaust equipment and comprises a hood shell, and a helium detection device body is mounted at the lower end in the hood shell. A plurality of box doors are mounted on the front surface of the hood shell through hinges; a ventilation mechanism used for blowing gas on the surface of the helium detection device body is installed in the machine cover shell. According to the utility model, through the cooperation of the suction fan and the guide groove, external air is injected into the air blowing pipe, and then air flow in the air blowing pipe enters the interior of the hood shell through the air blowing hole to blow helium at the connection part of the helium detection device body and the pipeline, so that the helium is separated from the connection part of the helium detection device body and the pipeline; and then the helium is exhausted through the cooperation of the exhaust hole and the exhaust fan, so that the situation that the helium detection precision is reduced due to the fact that the helium is accumulated at the pipeline connecting position is avoided, and the device is more convenient and practical.

Description

Technical Field

[0001] The utility model relates to the technical field of exhaust equipment, in particular to a hood duct exhaust system. Background Art

[0002] Helium inspection is a means of inspection. After the inspected workpiece is evacuated, it is filled with helium of a certain pressure. The outside of the inspected workpiece is a vacuum box with a certain vacuum requirement, and the vacuum box is connected to the leak detection port of the helium mass spectrometer leak detector. When using helium, there will be a small amount of helium leakage at the interface because the helium passes through the internal pipes and interfaces of the equipment. Over time, the amount of accumulation increases, which directly affects the accuracy of helium inspection. In order to discharge the trace helium at the pipe interface, multiple exhaust fans are generally installed directly on the upper end of the hood to discharge the gas inside the hood. However, since helium is generally accumulated at the pipe interface, when the exhaust fan discharges the gas inside the hood to the outside, it can only discharge air and cannot attract and discharge helium. Therefore, we propose an exhaust device to discharge the accumulated helium in the pipe structure to prevent helium from affecting the accuracy of helium inspection. Utility Model Content

[0003] The main purpose of the utility model is to provide a hood duct exhaust system, which can effectively solve the problems in the background technology.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] The hood duct exhaust system comprises a hood shell, wherein a helium detection device body is installed at the lower end of the inner part of the hood shell;

[0006] A plurality of doors are installed on the front surface of the housing through hinges;

[0007] A ventilation mechanism for blowing gas on the surface of the helium detection device body is installed inside the housing.

[0008] Preferably, grooves are respectively provided on the front surface of the door and at the ends close to each other;

[0009] Observation windows are respectively provided on the front surfaces of the door located in the middle of the hood shell.

[0010] Preferably, support frames are respectively installed at the front and rear ends of one side of the hood shell, and a plurality of bases are installed on the support frame and the lower surface of the hood shell.

[0011] Preferably, the ventilation mechanism comprises a fixing block, the fixing block is fixedly mounted on the lower surface of the hood shell, and a groove is provided inside the fixing block;

[0012] A guide groove is provided at the inner lower end of the hood shell, and the guide groove and the groove are connected to each other;

[0013] A suction fan is installed at the inner upper end of the groove.

[0014] Preferably, a connecting pipe is fixedly installed through the lower end of the groove, and one end of the connecting pipe is mounted in a temporary storage bucket, and the temporary storage bucket is used to recover dust and impurities from the outside, so that users can clean it later;

[0015] A plurality of filter screens are installed inside the connecting pipe near one end of the temporary storage barrel.

[0016] Preferably, air blowing pipes are fixedly installed at both ends of the lower side of the inner part of the hood shell, and the lower ends of the air blowing pipes are connected to the guide grooves.

[0017] A plurality of blowing holes are respectively provided on one side of the blowing pipe close to the helium detection device body.

[0018] Preferably, an exhaust hole is installed through the inner upper end of the hood shell, an exhaust fan is installed at the upper end of the exhaust hole, and the exhaust fan is used to assist the blowing hole to allow air inside the hood shell to flow.

[0019] (1) In the present invention, the outside air is injected into the interior of the air blowing pipe by the cooperation of the suction fan and the guide groove, and then the airflow inside the air blowing pipe enters the interior of the hood shell through the air blowing hole, blowing the helium gas at the helium detection device body and the pipe connection, so that the helium gas is separated from the helium detection device body and the pipe connection, and then the exhaust hole and the exhaust fan cooperate to discharge the helium gas, thereby avoiding the decrease in the accuracy of helium detection due to the accumulation of helium gas at the pipe connection, and being more convenient and practical.

[0020] (2) In the present invention, when the suction fan sucks the external air, the filter provided inside the connecting pipe filters the dust and various impurities contained in the air, thereby preventing the external dust and impurities from entering the interior of the hood shell with the air and damaging the helium detection device body. The dust and impurities filtered by the filter will fall into the interior of the temporary storage barrel for temporary storage, which is convenient for the user to recover and clean it as a whole later, which is simpler and more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the hood duct exhaust system of the utility model;

[0022] Figure 2 This is a front view structural diagram of the hood duct exhaust system of the utility model;

[0023] Figure 3It is a side view structural diagram of the hood duct exhaust system of the utility model;

[0024] Figure 4 The utility model is a hood duct exhaust system Figure 3 Schematic diagram of the cross-section structure at AA in the middle;

[0025] Figure 5 The utility model is a hood duct exhaust system Figure 4 Enlarged structural diagram at B in the middle.

[0026] In the figure: 1. hood shell; 2. box door; 3. support frame; 4. ventilation mechanism; 401. fixing block; 402. groove; 403. guide groove; 404. suction fan; 405. temporary storage bucket; 406. connecting pipe; 407. filter; 408. air blowing pipe; 409. air blowing hole; 410. exhaust hole; 411. exhaust fan; 5. groove; 6. observation window; 7. base; 8. helium detection device body. DETAILED DESCRIPTION

[0027] The following will be combined with the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] like Figure 1 and Figure 4 As shown, the hood duct exhaust system includes a hood shell 1, and a helium detection device body 8 is installed at the lower end of the interior of the hood shell 1; a plurality of door 2 are installed on the front surface of the hood shell 1 through hinges; and a ventilation mechanism 4 for blowing gas on the surface of the helium detection device body 8 is installed inside the hood shell 1.

[0029] like Figure 1 and Figure 2 As shown, it should be noted that grooves 5 are respectively provided on the front surface of the door 2 and at one end close to each other; and observation windows 6 are respectively penetrated on the front surface of the door 2 located in the middle of the hood shell 1.

[0030] The user can observe the various components inside the hood shell 1 through the observation window 6, which is convenient for the user to understand the working conditions of the components inside the hood shell 1;

[0031] Then the pull groove 5 is used to assist the user to open or close the door 2, which is simpler and more convenient.

[0032] like Figure 1 and Figure 2As shown, it should be noted that support frames 3 are respectively installed at the front and rear ends of one side of the hood shell 1, and a plurality of bases 7 are installed on the lower surface of the support frame 3 and the hood shell 1.

[0033] The hood shell 1 is supported by the support frame 3 and the base 7, thereby avoiding contact between the lower surface of the hood shell 1 and the ground, so that the lower end of the hood shell 1 will not be corroded, and the hood shell 1 and internal components are better protected. At the same time, the support frame 3 and the base 7 make the hood shell 1 more stable and will not shake.

[0034] like Figure 4 and Figure 5 As shown, it should be noted that the ventilation mechanism 4 includes a fixed block 401, which is fixedly mounted on the lower surface of the hood shell 1, and a groove 402 is provided inside the fixed block 401; a guide groove 403 is provided at the lower end of the inner part of the hood shell 1, and the guide groove 403 and the groove 402 are connected to each other; a suction fan 404 is installed at the inner upper end of the groove 402.

[0035] Air is injected into the groove 402 and the guide groove 403 through the suction fan 404, and then the air flows along the guide groove 403 to allow the air to enter the inside of the blowing pipe 408, and finally discharged from the blowing hole 409 provided on the blowing pipe 408 to blow the helium accumulated on the surface of the interface between the helium detection device body 8 and the pipeline, and cooperate with the exhaust fan 411 to discharge and clean the helium, thereby improving the accuracy of helium detection.

[0036] like Figure 5 As shown, it should be noted that a connecting pipe 406 is fixedly installed through the lower end of the inner part of the groove 402, and one end of the connecting pipe 406 is snap-fitted into the interior of the temporary storage bucket 405. The temporary storage bucket 405 is used to recycle external dust and impurities to facilitate subsequent cleaning by users; a plurality of filters 407 are installed inside the connecting pipe 406 near one end of the temporary storage bucket 405.

[0037] The connecting pipe 406 guides the external air through the temporary storage barrel 405, and when the air enters the connecting pipe 406, the filter 407 provided inside the connecting pipe 406 will filter the dust and impurities contained in the air, allowing the dust and impurities to be retained inside the temporary storage barrel 405, which is convenient for the user to clean and recycle the dust and impurities later, and also prevents dust and impurities from entering the interior of the hood shell 1 through the air and damaging the components inside the hood shell 1.

[0038] like Figure 4As shown, it should be noted that, air blowing pipes 408 are fixedly installed at both ends of the lower side of the inner part of the hood shell 1, and the lower end of the air blowing pipe 408 is connected to the guide groove 403; a plurality of air blowing holes 409 are respectively penetrated by the side of the air blowing pipe 408 close to the helium detection device body 8, and an exhaust hole 410 is penetrated by the upper end of the inner part of the hood shell 1, and an exhaust fan 411 is installed at the upper end of the exhaust hole 410, and the exhaust fan 411 is used to assist the air blowing holes 409 to allow the air inside the hood shell 1 to flow.

[0039] After the air flow enters the interior of the blowing pipe 408 along the guide groove 403, it is discharged through the blowing hole 409, so that the air flow blows the helium accumulated on the surface of the internal components of the hood shell 1, so that the helium is separated from the surface of the components, and then the exhaust hole 410 and the exhaust fan 411 are cooperated to discharge the helium, maintain the air flow inside the hood shell 1, and improve the accuracy of helium detection.

[0040] The working principle of the hood duct exhaust system:

[0041] When in use, the suction fan 404 first injects air into the groove 402 and the guide groove 403, and then the air flows along the guide groove 403 to allow the air to enter the inside of the blowing pipe 408. After the air flow enters the inside of the blowing pipe 408 along the guide groove 403, it is discharged through the blowing hole 409, so that the air flow blows the helium accumulated on the surface of the internal components of the hood shell 1, so that the helium is separated from the surface of the components, and then the exhaust hole 410 and the exhaust fan 411 are cooperated to discharge the helium, so as to maintain the air flow inside the hood shell 1 and improve the accuracy of helium detection.

[0042] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present invention are still within the protection scope of the present invention.

Claims

1. A hood duct exhaust system, comprising a hood housing (1), characterized in that: A helium detection device body (8) is installed at the lower end of the inner part of the hood shell (1); A plurality of cabinet doors (2) are installed on the front surface of the hood shell (1) via hinges; A ventilation mechanism (4) for blowing gas on the surface of a helium detection device body (8) is installed inside the hood shell (1).

2. The hood duct exhaust system according to claim 1, characterized in that: The front surface of the box door (2) and the ends close to each other are respectively provided with drawing grooves (5); Observation windows (6) are respectively provided through the front surface of the box door (2) located in the middle of the hood shell (1).

3. The hood duct exhaust system according to claim 1, characterized in that: Support frames (3) are respectively installed at the front and rear ends of one side of the hood shell (1), and a plurality of bases (7) are installed on the lower surface of the support frame (3) and the hood shell (1).

4. The hood duct exhaust system according to claim 1, characterized in that: The ventilation mechanism (4) comprises a fixing block (401), the fixing block (401) being fixedly mounted on the lower surface of the hood shell (1), and a groove (402) is provided inside the fixing block (401); A guide groove (403) is provided at the inner lower end of the hood shell (1), and the guide groove (403) and the groove (402) are connected to each other; A suction fan (404) is installed at the inner upper end of the groove (402).

5. The hood duct exhaust system according to claim 4, characterized in that: A connecting pipe (406) is fixedly installed through the lower end of the groove (402), and one end of the connecting pipe (406) is snap-fitted into the interior of a temporary storage bucket (405). The temporary storage bucket (405) is used to recover dust and impurities from the outside, so that users can clean it up later. A plurality of filter screens (407) are installed inside the connecting pipe (406) at one end close to the temporary storage barrel (405).

6. The hood duct exhaust system according to claim 5, characterized in that: Air blowing pipes (408) are fixedly installed and penetrated at both ends of the lower side of the hood shell (1), and the lower end of the air blowing pipe (408) is connected to the guide groove (403); A plurality of blowing holes (409) are respectively provided through one side of the blowing pipe (408) close to the helium detection device body (8).

7. The hood duct exhaust system according to claim 6, characterized in that: An exhaust hole (410) is installed through the upper end of the inner part of the hood shell (1), and an exhaust fan (411) is installed at the upper end of the exhaust hole (410). The exhaust fan (411) is used to assist the blowing hole (409) to allow the air inside the hood shell (1) to flow.

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