A sealing structure and a laminar flow hood

Abstract

The utility model relates to the technical field of purification laminar flow hood, concretely is a sealing structure and laminar flow hood. It includes laminar flow hood shell, filter screen subassembly, sealing subassembly and detection device. The bottom end air inlet of laminar flow hood shell is provided with rectangular sealing frame;Filter screen subassembly includes filter screen outer frame and installs filter screen in filter screen outer frame inboard;Sealing subassembly includes first U type sealing outer frame and second U type sealing outer frame, and first U type sealing outer frame inboard is provided with two first sealing strips, and second U type sealing outer frame inboard is provided with two second sealing strips;First U type sealing outer frame and second U type sealing outer frame inboard wall all are provided with air flow channel;Detection device includes micro -pump, controller, solenoid valve and electronic air gauge. The utility model has the characteristics that the sealing property is good, and has the function of air leakage detection, and the functionality is strong.

Description

Technical Field

[0001] This utility model relates to the field of clean laminar flow hood technology, and in particular to a sealing structure and a laminar flow hood. Background Technology

[0002] Laminar flow hoods are widely used in precision machinery, electronics, pharmaceuticals, food, and fine chemicals industries. They are air purification devices that provide a locally highly clean environment. They mainly consist of a housing, fan, air filter, damping layer, and lighting fixtures (see attached diagram). In a clean laminar flow hood, air is passed through a high-efficiency air filter at a certain pressure by a fan, and then the damping layer equalizes the pressure, ensuring that the clean air is delivered to the working area in a vertical laminar flow pattern, thereby guaranteeing the high cleanliness required by the process.

[0003] Conventionally, the filter frame and the laminar flow hood shell are usually sealed with a sealing ring. However, over time, the sealing ring will age. Since the current technology usually relies on manual replacement of the sealing ring at regular intervals to maintain the sealing at the connection, the aging and failure time of each sealing ring cannot be guaranteed to be consistent due to the influence of the installation environment. When the sealing ring ages prematurely, it is easy to cause air leakage. Utility Model Content

[0004] The purpose of this invention is to address the problems existing in the background technology by proposing a sealing structure and a laminar flow hood.

[0005] On the one hand, this utility model proposes a sealing structure, including: The laminar flow hood shell has a rectangular sealing frame at the bottom air inlet, a third rectangular sealing groove on the outer periphery of the rectangular sealing frame, and a rectangular sealing strip at the bottom of the rectangular sealing frame. The filter assembly includes a filter frame and a filter installed inside the filter frame. The filter frame and the bottom of the laminar flow hood have a detachable connection structure. The upper end of the filter frame is provided with a second rectangular sealing groove for a rectangular sealing strip to be inserted, and the periphery of the filter frame is provided with a first rectangular sealing groove. The sealing assembly includes a first U-shaped sealing outer frame and a second U-shaped sealing outer frame. The first U-shaped sealing outer frame and the second U-shaped sealing outer frame have a detachable connection structure. Two first sealing strips are provided on the inner side of the first U-shaped sealing outer frame, and two second sealing strips are provided on the inner side of the second U-shaped sealing outer frame. Airflow channels are provided on the inner sidewalls of both the first U-shaped sealing outer frame and the second U-shaped sealing outer frame. The detection device includes a miniature air pump, a controller, a solenoid valve, and an electronic pressure gauge. The miniature air pump and the controller are both mounted on the first U-shaped sealed outer frame. The output end of the miniature air pump is connected to an inflation tube, and the other end of the inflation tube is located in the airflow channel. The solenoid valve and the electronic pressure gauge are both mounted on the inflation tube.

[0006] Preferably, both ends of the first sealing strip are provided with protrusions, and both ends of the second sealing strip are provided with first sealing grooves for the protrusions to be engaged.

[0007] Preferably, a third sealing strip is provided at both ends of the inner wall of the first U-shaped sealing frame, and the cross-section of the third sealing strip is "T" shaped. A fourth sealing strip is provided at both ends of the inner wall of the second U-shaped sealing frame, and a second sealing groove is provided on the second U-shaped sealing frame for the end of the third sealing strip to be inserted.

[0008] Preferably, the filter frame is connected to multiple fixing brackets, and the fixing brackets are detachably connected to the laminar flow hood shell by screws.

[0009] Preferably, both the ends of the first U-shaped sealing outer frame and the second U-shaped sealing outer frame are connected with connecting ear plates, and adjacent connecting ear plates are detachably connected by bolts and nuts.

[0010] Preferably, the controller is a microcontroller with remote communication capabilities.

[0011] On the other hand, this utility model also proposes a laminar flow hood with the above-mentioned sealing structure.

[0012] Compared with the prior art, the present invention has the following beneficial technical effects: This technical solution incorporates a multi-layer sealing structure, which improves the sealing performance at the connection between the rectangular sealing frame and the outer frame of the filter screen. Furthermore, the cooperation between the groove and the sealing strip increases the contact area at the sealing point, thereby enhancing the sealing effect.

[0013] The installed detection device can periodically test the sealing performance of the sealing location, and it also has a remote communication function, enabling technicians to detect problems in a timely manner. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is an exploded view of the present invention.

[0016] Figure 3 This is a schematic diagram of the structure of the first U-shaped sealing outer frame and the second U-shaped sealing outer frame in this utility model.

[0017] Figure 4 This is a schematic diagram of the filter assembly in this utility model.

[0018] Figure 5 for Figure 3 A magnified schematic diagram of the structure at point A.

[0019] Reference numerals: 1. Laminar flow hood outer shell; 201. Filter screen outer frame; 2011. First rectangular sealing groove; 2012. Second rectangular sealing groove; 202. Filter screen; 301. First U-shaped sealing outer frame; 302. Second U-shaped sealing outer frame; 3001. Airflow channel; 4. Fixing frame; 5. Miniature air pump; 6. Controller; 7. Inflation pipe; 8. Solenoid valve; 91. First sealing strip; 911. Protrusion; 92. Second sealing strip; 921. First sealing groove; 10. Electronic pressure gauge; 11. Rectangular sealing frame; 111. Third rectangular sealing groove; 12. Rectangular sealing strip; 131. Third sealing strip; 132. Fourth sealing strip; 1321. Second sealing groove; 14. Connecting ear plate. Detailed Implementation

[0020] Example 1 like Figures 1-5 As shown, the sealing structure proposed in this embodiment includes a laminar flow hood shell 1, a filter assembly, a sealing assembly, and a detection device.

[0021] A rectangular sealing frame 11 is provided at the bottom air inlet of the laminar flow hood shell 1. A third rectangular sealing groove 111 is provided on the outer periphery of the rectangular sealing frame 11. A rectangular sealing strip 12 is provided at the bottom of the rectangular sealing frame 11. The filter assembly includes a filter frame 201 and a filter 202 installed inside the filter frame 201. The filter frame 201 has a detachable connection structure with the bottom of the laminar flow hood shell 1. Multiple fixing brackets 4 are connected to the filter frame 201. The fixing brackets 4 are detachably connected to the laminar flow hood shell 1 by screws. The upper end of the filter frame 201 is provided with a second rectangular sealing groove 2012 for the rectangular sealing strip 12 to be inserted. The periphery of the filter frame 201 is provided with a first rectangular sealing groove 2011. The sealing assembly includes a first U-shaped sealing frame 301 and a second U-shaped sealing frame 302. Both the first and second U-shaped sealing frames 301 and 302 have connecting lugs 14 at their ends. Adjacent connecting lugs 14 are detachably connected by bolts and nuts. The first and second U-shaped sealing frames 301 and 302 have a detachable connection structure. The first U-shaped sealing frame 301 has two first sealing strips 91 on its inner side, and the second U-shaped sealing frame 302 has two second sealing strips 92 on its inner side. Airflow channels 3001 are provided on the inner walls of both the first and second U-shaped sealing frames 301 and 302. It should be noted that the airflow channel 3001 on the first U-shaped sealing frame 301 is located between the two first sealing strips 91, and the airflow channel 3001 on the second U-shaped sealing frame 302 is located between the two second sealing strips 92. The airflow channels 3001 on both sides form a rectangular gas channel.

[0022] The detection device includes a miniature air pump 5, a controller 6, a solenoid valve 8, and an electronic pressure gauge 10. The miniature air pump 5 and the controller 6 are both mounted on the first U-shaped sealed outer frame 301. The output end of the miniature air pump 5 is connected to an inflation tube 7, and the other end of the inflation tube 7 is located in the airflow channel 3001. The solenoid valve 8 and the electronic pressure gauge 10 are both mounted on the inflation tube 7. The controller 6 is a microcontroller with remote communication function.

[0023] In this technical solution, when the filter assembly is installed at the bottom of the laminar flow hood housing 1, the rectangular sealing strip 12 is inserted into the second rectangular sealing groove 2012, thereby achieving a seal between the rectangular sealing frame 11 and the filter outer frame 201; multiple fixing brackets 4 are fixed to the bottom of the laminar flow hood housing 1 with screws to complete the installation of the filter assembly.

[0024] The first U-shaped sealing frame 301 and the second U-shaped sealing frame 302 are pushed inward from both sides of the filter assembly. When installing the first U-shaped sealing frame 301, it is necessary to ensure that the two first sealing strips 91 are aligned with the third rectangular sealing groove 111 and the first rectangular sealing groove 2011, respectively. When installing the second U-shaped sealing frame 302, it is necessary to ensure that the two second sealing strips 92 are aligned with the third rectangular sealing groove 111 and the first rectangular sealing groove 2011, respectively. When the ends of the first U-shaped sealing frame 301 and the second U-shaped sealing frame 302 are in contact, the first U-shaped sealing frame 301 and the second U-shaped sealing frame 302 are fixedly connected by bolts and nuts. At this time, the two second sealing strips 92 are in contact with the two first sealing strips 91, respectively. Through the above structure, the sealing performance between the filter frame 201 and the rectangular sealing frame 11 is further improved. Furthermore, by inserting the sealing strips into the sealing grooves, the sealing area can be increased and the sealing effect can be improved.

[0025] The controller 6 periodically starts the micro air pump 5 to inflate the airflow channel 3001, maintaining a certain air pressure before shutting off the micro air pump 5 and closing the solenoid valve 8. The electronic pressure gauge 10 detects the air pressure inside the inflation tube 7. If there is leakage between the rectangular sealing frame 11 and the filter outer frame 201, between the first sealing strip 91 and the rectangular sealing frame 11, between the first sealing strip 91 and the filter outer frame 201, between the second sealing strip 92 and the rectangular sealing frame 11, or between the second sealing strip 92 and the filter outer frame 201, the air pressure decreases. The electronic pressure gauge 10 feeds back the detected signal to the controller 6, which then transmits the signal to the terminal equipment to remind personnel to perform timely maintenance. After the detection is completed, the solenoid valve 8 is opened to release the high-pressure gas in the airflow channel 3001. The micro air pump 5 is a standard air pump (without a check valve) to ensure the discharge of high-pressure gas.

[0026] Example 2 like Figure 5 As shown, in this embodiment, a sealing structure is proposed. Compared with the first embodiment, in this embodiment, both ends of the first sealing strip 91 are provided with protrusions 911, and both ends of the second sealing strip 92 are provided with first sealing grooves 921 for the protrusions 911 to be inserted into. This arrangement increases the contact area between the ends of the first sealing strip 91 and the second sealing strip 92, thereby improving the sealing effect.

[0027] The inner walls of the first U-shaped sealing frame 301 are provided with a third sealing strip 131 at both ends. The cross-section of the third sealing strip 131 is "T" shaped. The inner walls of the second U-shaped sealing frame 302 are provided with a fourth sealing strip 132 at both ends. The second U-shaped sealing frame 302 is provided with a second sealing groove 1321 for the end of the third sealing strip 131 to be inserted. The third sealing strip 131 and the fourth sealing strip 132 are provided to seal the joint between the first U-shaped sealing frame 301 and the second U-shaped sealing frame 302.

[0028] This utility model also proposes a laminar flow hood including the above embodiments.

[0029] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A sealing structure, characterized in that, include: The laminar flow hood shell (1) has a rectangular sealing frame (11) at the bottom air inlet of the laminar flow hood shell (1). A third rectangular sealing groove (111) is opened on the outer periphery of the rectangular sealing frame (11), and a rectangular sealing strip (12) is provided at the bottom of the rectangular sealing frame (11). The filter assembly includes a filter frame (201) and a filter (202) installed inside the filter frame (201). The filter frame (201) and the bottom of the laminar flow hood (1) have a detachable connection structure. The upper end of the filter frame (201) is provided with a second rectangular sealing groove (2012) for the rectangular sealing strip (12) to be inserted. The periphery of the filter frame (201) is provided with a first rectangular sealing groove (2011). The sealing assembly includes a first U-shaped sealing frame (301) and a second U-shaped sealing frame (302). The first U-shaped sealing frame (301) and the second U-shaped sealing frame (302) have a detachable connection structure. The first U-shaped sealing frame (301) is provided with two first sealing strips (91) on its inner side, and the second U-shaped sealing frame (302) is provided with two second sealing strips (92) on its inner side. Airflow channels (3001) are provided on the inner walls of both the first U-shaped sealing frame (301) and the second U-shaped sealing frame (302). The detection device includes a micro air pump (5), a controller (6), a solenoid valve (8), and an electronic pressure gauge (10). The micro air pump (5) and the controller (6) are both installed on the first U-shaped sealed outer frame (301). The output end of the micro air pump (5) is connected to an inflation tube (7). The other end of the inflation tube (7) is located in the airflow channel (3001). The solenoid valve (8) and the electronic pressure gauge (10) are both installed on the inflation tube (7).

2. The sealing structure according to claim 1, characterized in that, Both ends of the first sealing strip (91) are provided with protrusions (911), and both ends of the second sealing strip (92) are provided with first sealing grooves (921) for the protrusions (911) to be inserted.

3. The sealing structure according to claim 2, characterized in that, The inner walls of the first U-shaped sealing frame (301) are provided with a third sealing strip (131) at both ends. The cross section of the third sealing strip (131) is "T" shaped. The inner walls of the second U-shaped sealing frame (302) are provided with a fourth sealing strip (132) at both ends. The second U-shaped sealing frame (302) is provided with a second sealing groove (1321) for the end of the third sealing strip (131) to be inserted.

4. A sealing structure according to claim 1, characterized in that, Multiple mounting brackets (4) are connected to the filter screen frame (201), and the mounting brackets (4) are detachably connected to the laminar flow hood shell (1) by screws.

5. A sealing structure according to claim 1, characterized in that, The ends of the first U-shaped sealing outer frame (301) and the second U-shaped sealing outer frame (302) are both connected to connecting ear plates (14), and adjacent connecting ear plates (14) are detachably connected by bolts and nuts.

6. A sealing structure according to claim 1, characterized in that, The controller (6) is a microcontroller with remote communication function.

7. A laminar flow hood, characterized in that, Includes the sealing structure described in any one of claims 1-6.

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