Detection device for detecting air tightness between cabin door and cabin door frame

Abstract

The utility model discloses a detection device for detecting air tightness between a cabin door and a cabin door frame, which comprises a detection closed chamber and a cabin door hoisting mechanism, the cabin door hoisting mechanism comprises a hoisting support fixed to the ground of the laboratory, a hoisting rope arranged on the hoisting support and a lifting device connected with the hoisting rope and used for lifting the cabin door. The top of the detection closed chamber is open, the bottom face of the detection closed chamber is fixedly arranged on the ground of a laboratory, the side wall of the detection closed chamber is fixedly provided with an air inlet communicated with a barometer and external inflation equipment, the top of the detection closed chamber is in sealed connection with the bottom of a door frame of the cabin door, and the cabin door is hung over the detection closed chamber. An air chamber is formed between the detection closed chamber and the cabin door, and door lock mechanisms which are matched with each other are fixedly arranged on the cabin door and the inner wall of the cabin door frame, so that the cabin door and the cabin door frame are locked. The utility model relates to an independent device for accurately detecting the air tightness of a cabin door.

Description

Technical Field

[0001] This utility model relates to the field of hatch inspection technology, and in particular to a testing device for detecting the airtightness between a hatch and its frame. Background Technology

[0002] In laboratories with high airtightness requirements, such as biosafety laboratories, chemical laboratories, and clean laboratories, the sealing performance of the experimental environment is crucial. As the main barrier between the laboratory and the external environment, the airtightness of the laboratory doors directly affects the stability and safety of the internal laboratory environment and the reliability of experimental results.

[0003] Currently, the airtightness testing of laboratory hatches mainly relies on overall laboratory airtightness testing, or releasing smoke inside the laboratory and observing whether smoke leaks out from the door gaps to determine the hatch's seal. However, these methods cannot specifically and accurately test the airtightness of hatches, resulting in measurement results that are greatly affected by the overall laboratory structure, and a lack of independent and precise means of testing hatch airtightness. Utility Model Content

[0004] This invention addresses the problems and shortcomings of existing technologies by providing a testing device for detecting the airtightness between a hatch and its frame.

[0005] The present invention solves the above-mentioned technical problems through the following technical solution:

[0006] This utility model provides a testing device for detecting the airtightness between a hatch and its frame. The device includes a testing chamber and a hatch hoisting mechanism. The hatch hoisting mechanism includes a hoisting bracket fixed to the floor of the laboratory, a hoisting rope for hoisting the hatch mounted on the hoisting bracket, and a lifting device connected to the hoisting rope for raising and lowering the hatch.

[0007] The top of the sealed testing chamber is open, and the bottom of the sealed testing chamber is fixed to the floor of the laboratory. An air inlet connected to a barometer and an external inflation device is fixed to the side wall of the sealed testing chamber. The top of the sealed testing chamber is sealed to the bottom of the door frame. The door is suspended directly above the sealed testing chamber and lowered into the door frame by a lifting device. An air chamber is formed between the sealed testing chamber and the door. A matching door lock mechanism is fixed to the door and the inner wall of the door frame to lock the door to the door frame.

[0008] To address the problems of existing technologies, this invention specifically designs an independent testing device for laboratory hatches with high airtightness requirements. Through the rational design of the testing chamber and hatch hoisting mechanism, the airtightness between the hatch and its frame can be accurately tested. Furthermore, this device is portable, facilitating flexible use in different laboratories or testing environments, thus improving the convenience and applicability of the testing. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of the detection device for detecting the airtightness between the hatch and the hatch frame, according to a preferred embodiment.

[0010] Figure 2 This is a schematic diagram of the assembled detection device for detecting the airtightness between the hatch and the hatch frame, according to a preferred embodiment.

[0011] Figure 3 This is a partial structural schematic diagram of the detection device for detecting the airtightness between the hatch and the hatch frame, according to a preferred embodiment. Detailed Implementation

[0012] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0013] like Figure 1-3 As shown, this embodiment provides a testing device for detecting the airtightness between a hatch and a hatch frame, including a testing sealed chamber 1 and a hatch hoisting mechanism.

[0014] The hatch hoisting mechanism includes a hoisting bracket 2 fixed on the floor of the laboratory, a hoisting rope 3 mounted on the hoisting bracket 2 for hoisting the hatch 5, and a lifting device 4 connected to the hoisting rope 3 for raising and lowering the hatch 5.

[0015] The hoisting bracket 2 includes a vertical support frame 21 and a horizontal support frame 22. The vertical support frame 21 is fixed on the floor of the laboratory and close to the side of the test chamber 1. For example, expansion bolts are used to fix the vertical support frame 21 on the floor of the laboratory. The horizontal support frame 22 is fixed on the top of the vertical support frame 21. A fixed pulley 23 is fixed on the horizontal support frame 22 and directly above the test chamber 1.

[0016] The hoisting rope 3 includes a connecting rope 31 and four lifting lug ropes 32. One end of the connecting rope 31 is wound around the lifting device 4, and the other end passes through a set pulley 23 and is fixedly connected to the top of the four lifting lug ropes 32. The bottom ends of the four lifting lug ropes 32 are fixedly connected to two lifting lugs 51 on one side and two lifting lugs 51 on the opposite side of the hatch 5, respectively. In this embodiment, the hoisting rope 3 can be a steel cable.

[0017] The experimenters can directly fix the lifting device 4 to the laboratory floor. Alternatively, the experimenters can fix the lifting device 4 to the ground using the equipment bracket 6. The door hoisting mechanism also includes the equipment bracket 6 fixed to the laboratory floor, on which the lifting device 4 is fixed. The bottom of the equipment bracket 6 is fixed to the laboratory floor by expansion bolts 61 wedged into the floor. In this embodiment, the lifting device 4 is a hand-cranked lifting device, which is existing equipment, and its structure will not be described in detail here.

[0018] The top of the sealed testing chamber 1 is open, and the bottom of the sealed testing chamber 1 is fixed to the floor of the laboratory. An air inlet 12, which connects to a barometer 11 and an external inflation device (existing equipment), is fixed to the side wall of the sealed testing chamber 1. The top of the sealed testing chamber 1 is sealed to the bottom of the door frame 7 with sealant. In this embodiment, the sealed testing chamber 1 can be a metal sealed testing chamber.

[0019] The hatch 5 is suspended above the test chamber 1 by the hoisting rope 3, and is lowered and embedded in the hatch frame 7 by the lifting device 4. An air chamber 8 is formed between the test chamber 1 and the hatch 5. The hatch 5 and the inner wall of the hatch frame 7 are fixed with a door lock mechanism 52 that cooperates with each other to lock the hatch 5 and the hatch frame 7. The door lock mechanism 52 adopts an existing structure, and its structure will not be described in detail here.

[0020] The process of using the testing device for detecting the airtightness between the hatch and the hatch frame is as follows: First, fix the testing sealed chamber 1 to the laboratory floor, such as by sealing the testing sealed chamber 1 to the laboratory floor with sealant. Second, use sealant to seal the hatch frame 7 to the testing sealed chamber 1. Third, wrap one end of the connecting rope 31 around the lifting device 4, and pass the other end through the set pulley 23 and fix it to the four lifting lug ropes 32. The four lifting lug ropes 32 are fixedly connected to the four lifting lugs 51 on the hatch 5. At this time, the hatch hoisting mechanism is installed, and the hatch 5 is hoisted directly above the testing sealed chamber 1 by the hoisting rope 3, and can be moved vertically by the drive of the lifting device 4. Fourth, operate the lifting device 4 to lower the hatch 5 and embed it into the hatch frame 7. Then, operate the door locking mechanism 52 to lock the hatch 5 to the hatch frame 7. At this time, an air chamber 8 for airtightness testing is formed between the testing sealed chamber 1 and the hatch 5. Fifth, turn on the air pump of the external inflation device and inject a certain amount of gas into the test chamber 1 through the air inlet 12 to create air pressure in the air chamber 8, then stop injecting gas. Sixth, observe the changes in the barometer 11 on the test chamber 1 to determine whether there is a gas leak between the hatch 5 and the hatch frame 7, thereby accurately detecting the airtightness between the hatch 5 and the hatch frame 7. If the pressure value of the barometer 11 does not change within a certain period of time, it is determined that the airtightness between the hatch 5 and the hatch frame 7 is good and there is no gas leak; if the pressure value of the barometer 11 gradually decreases within a certain period of time, it is determined that the airtightness between the hatch 5 and the hatch frame 7 is poor and there is a gas leak.

[0021] This invention relates to a dedicated testing device for laboratory hatches with high airtightness requirements. Through the rational design of the testing chamber and hatch hoisting mechanism, the airtightness between the hatch and its frame can be accurately tested. Furthermore, this device is portable, facilitating flexible use in different laboratories or testing environments, thus improving the convenience and applicability of the testing.

[0022] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. A testing device for detecting the airtightness between a hatch and its frame, characterized in that, It includes a test chamber and a door hoisting mechanism. The door hoisting mechanism includes a hoisting bracket fixed to the floor of the laboratory, a hoisting rope for hoisting the door set on the hoisting bracket, and a lifting device connected to the hoisting rope for raising and lowering the door. The top of the sealed testing chamber is open, and the bottom of the sealed testing chamber is fixed to the floor of the laboratory. An air inlet connected to a barometer and an external inflation device is fixed to the side wall of the sealed testing chamber. The top of the sealed testing chamber is sealed to the bottom of the door frame. The door is suspended directly above the sealed testing chamber and lowered into the door frame by a lifting device. An air chamber is formed between the sealed testing chamber and the door. A matching door lock mechanism is fixed to the door and the inner wall of the door frame to lock the door to the door frame.

2. The detection device for detecting the airtightness between a hatch and its frame as described in claim 1, characterized in that, The hoisting bracket includes a vertical support frame and a horizontal support frame. The vertical support frame is fixed on the floor of the laboratory and close to the side of the testing sealed chamber. The horizontal support frame is fixed on the top of the vertical support frame. A fixed pulley is fixed on the horizontal support frame and directly above the testing sealed chamber.

3. The detection device for detecting the airtightness between a hatch and its frame as described in claim 2, characterized in that, The hoisting rope includes a connecting rope and four lifting lug ropes. One end of the connecting rope is wound around the lifting equipment, and the other end passes through a set pulley and is fixedly connected to the four lifting lug ropes. The four lifting lug ropes are fixedly connected to two lifting lugs on one side of the hatch and two lifting lugs on the opposite side, respectively.

4. The detection device for detecting the airtightness between a hatch and its frame as described in claim 3, characterized in that, The hoisting rope is a steel cable.

5. The detection device for detecting the airtightness between a hatch and its frame as described in claim 1, characterized in that, The lifting device is fixed to the floor of the laboratory.

6. The detection device for detecting the airtightness between a hatch and its frame as described in claim 1, characterized in that, The hatch hoisting mechanism also includes an equipment bracket fixed to the floor of the laboratory, on which a lifting device is fixed.

7. The detection device for detecting the airtightness between a hatch and its frame as described in claim 6, characterized in that, The bottom of the equipment bracket is fixed to the laboratory floor by expansion bolts that are wedged into the laboratory floor.

8. The detection device for detecting the airtightness between a hatch and its frame as described in claim 1, characterized in that, The lifting device is a hand-cranked lifting device.

9. The detection device for detecting the airtightness between a hatch and its frame as described in claim 1, characterized in that, The top of the sealed testing chamber is sealed to the bottom of the door frame with sealant.

10. The detection device for detecting the airtightness between a hatch and its frame as described in claim 1, characterized in that, The detection chamber is a metal detection chamber.

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