Air tightness detection device and method for closed chest drainage bottle

Abstract

The present invention discloses an air tightness detection device for a closed chest drainage bottle, and relates to the field of medical devices. A detection device for detecting the air tightness of a closed chest drainage bottle is provided. The air tightness detection device for a closed chest drainage bottle includes a first detection device, which includes a hot air blower, a liquid bottle, a three-way valve, a transparent self-test tube, and a transparent detection tube; the hot air blower is provided with a hot air blower connector; the liquid bottle includes a bottle body, a bottle cap, and an inner tube in the bottle, the bottle cap is covered on the bottle body, the bottle cap is provided with a breathing port, the inner tube in the bottle is connected to the bottle cap and extends to the lower part of the bottle body; the self-test tube is vertically arranged above the bottle cap and connected to the bottle cap, the self-test tube is provided with a small detection hole, and the small detection hole is connected to the inner tube in the bottle; the three-way valve is located above the self-test tube and connected to the self-test tube; the detection tube is vertically arranged above the three-way valve and connected to the three-way valve, the detection tube is provided with a large detection hole, and the top of the detection tube is provided with a detection tube connector.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and in particular to an air tightness detection device for a closed chest drainage bottle. Background Art

[0002] Closed chest drainage bottles are also called water seal bottles and are available in three types: single-chamber, double-chamber and triple-chamber. Figure 1 This is a double-chambered chest drainage bottle. Connector A in the figure connects to the drainage tube inserted into the patient's chest cavity, while connector B connects to a negative pressure device or directly connects to the outside world. Water is added to the right chamber, and the water level must be higher than the lower end of tube C. This creates a water seal, preventing outside air from entering the left chamber and then the patient's chest cavity, thus preventing the patient from experiencing breathing difficulties and other discomfort.

[0003] The closed chest drainage bottle has high requirements for air tightness. Figure 1 If the left cavity is not airtight, gas will enter the left cavity and then enter the patient's chest cavity through connector A, and the water seal will lose its meaning. If the right cavity is not airtight, the negative pressure device will not be able to achieve a good negative pressure effect in the right cavity, affecting drainage.

[0004] Discovering a poor airtightness in a chest drainage bottle during use will undoubtedly impact the patient's recovery. In the applicant's clinical practice, patients frequently experience discomfort and the need for replacement due to poor airtightness in chest drainage bottles, with the probability of poor airtightness sometimes reaching as high as 10%. This could be due to the poor quality of the chest drainage bottle itself or minor cracks caused by collisions during transportation and storage.

[0005] In summary, it is best to test the airtightness of chest drainage bottles before use to avoid the use of closed chest drainage bottles with poor airtightness. However, according to the applicant, there is currently no dedicated testing device. A search also did not find any airtightness testing devices for closed chest drainage bottles. Only patents such as ZL202020309838.X and ZL201922188720.6 disclose closed chest drainage bottles with improved airtightness. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a detection device for detecting the air tightness of a closed chest drainage bottle.

[0007] The technical solution adopted to solve the above problems is: the air tightness detection device of the closed chest drainage bottle includes a first detection device, the first detection device includes a hot air blower, a liquid bottle, a three-way valve, a transparent self-test tube and a transparent detection tube; the hot air blower is provided with a hot air blower connector; the liquid bottle includes a bottle body, a bottle cap and an inner bottle tube, the bottle cap is covered on the bottle body, the bottle cap has a breathing port, the inner bottle tube is connected to the bottle cap and extends to the lower part of the bottle body; the self-test tube is vertically arranged above the bottle cap and connected to the bottle cap, the self-test tube has a small detection hole, and the small detection hole is connected to the inner bottle tube; the three-way valve is located above the self-test tube and connected to the self-test tube; the detection tube is vertically arranged above the three-way valve and connected to the three-way valve, the detection tube has a large detection hole, and the top of the detection tube has a detection tube connector; the three-way valve can control the large detection hole to be connected to the small detection hole or to the outside world.

[0008] Furthermore, the air tightness detection device for the closed chest drainage bottle includes a first base; the three-way valve is an electrically controlled valve; the first base includes a base shell and a power supply and a controller arranged in the base shell, the power supply is electrically connected to the hot air blower, the three-way valve and the controller, and the controller is electrically connected to the hot air blower and the three-way valve; the controller can control the hot air blower to turn on and off after a period of time; the controller can control the three-way valve so that the large detection hole is connected to the outside world when the hot air blower is turned on, and the large detection hole is connected to the small detection hole when the hot air blower is turned off.

[0009] Furthermore, the detection tube is provided with a single-cavity bottle qualified mark, a double-cavity bottle qualified mark and a triple-cavity bottle qualified mark which are sequentially arranged from bottom to top; and the self-test tube is provided with a self-test qualified mark.

[0010] Furthermore, the air tightness detection device for the closed chest drainage bottle includes a second detection device, which includes a second base, a liquid box, a guide rod, a slider, a clamping structure and a heating cover; the liquid box is placed on the second base, the guide rod is located next to the liquid box and is connected to the second base, there are two sliders, both of which are mounted on the guide rod, the clamping structure is connected to the lower slider, the clamping structure can clamp the closed chest drainage bottle, the heating cover is connected to the upper slider, the heating cover can cover the closed chest drainage bottle and heat it.

[0011] Furthermore, a positioning sleeve is provided on the second base, and the liquid box is located in the positioning sleeve.

[0012] Furthermore, the clamping structure includes a U-shaped clamp body, a clamping plate, a connecting rod, an operating plate and a spring. The clamping plate is located in the U-shaped clamp body, the operating plate is located on the outside of a side plate of the U-shaped clamp body, the connecting rod passes through the side plate and is connected to the clamping plate and the operating plate, and the spring is arranged between the clamping plate and the operating plate, and the spring pushes the clamping plate inside.

[0013] Furthermore, the clamping structure includes an operating rod, which passes through the operating plate and is connected to the side plate.

[0014] Furthermore, the heating cover comprises a cover body and an infrared heating lamp arranged in the cover body.

[0015] Another technical problem to be solved by the present invention is to provide a detection device for detecting the air tightness of a closed chest drainage bottle.

[0016] The technical solution adopted to solve the above problem is: a method for detecting air tightness of a closed chest drainage bottle, using the first detection device of the aforementioned air tightness detection device of the closed chest drainage bottle to perform a first detection, the steps are as follows:

[0017] A. Add water to the liquid bottle; connect the cavities of the chest closed drainage bottle, and use the pipe to connect the chest closed drainage bottle to the hot air blower connector and the detection tube connector;

[0018] B. Turn on the hot air blower to fill the chest closed drainage bottle with hot air, and then turn off the hot air blower;

[0019] C. Wait for the hot air in the chest closed drainage bottle to cool down, and observe whether the water in the liquid bottle is sucked into the detection tube to determine the airtightness of the chest closed drainage bottle;

[0020] D. If step C shows that the chest drainage bottle is not airtight, use the pipe to connect the hot air blower connector to the test tube connector; turn on the hot air blower to fill the test tube with hot air, and then turn off the hot air blower; wait for the hot air in the test tube to cool down, and observe whether the water in the liquid bottle is sucked into the test tube to further determine the airtightness of the chest drainage bottle.

[0021] Another technical solution adopted to solve the above problem is: a method for detecting air tightness of a closed chest drainage bottle, using the first detection device of the aforementioned air tightness detection device of the closed chest drainage bottle to perform a first detection, the steps are as follows:

[0022] A. Add water to the liquid bottle; connect the cavities of the chest closed drainage bottle, and use the pipe to connect the chest closed drainage bottle to the hot air blower connector and the detection tube connector;

[0023] B. Turn on the hot air blower to fill the chest closed drainage bottle with hot air, and then turn off the hot air blower;

[0024] C. Wait for the hot air in the chest closed drainage bottle to cool down, and observe whether the water in the liquid bottle is sucked into the detection tube to determine the airtightness of the chest closed drainage bottle;

[0025] D. If the chest drainage bottle is found to be airtight in step C, connect the hot air blower connector to the test tube connector using a pipe; turn on the hot air blower to fill the test tube with hot air, then turn off the hot air blower; wait for the hot air in the test tube to cool, and observe whether the water in the liquid bottle is drawn into the test tube to further confirm the airtightness of the chest drainage bottle;

[0026] The second test is performed using the second test device of the aforementioned chest cavity closed drainage bottle air tightness test device, and the steps are as follows:

[0027] E. The liquid box is filled with water, the clamping structure clamps the inverted chest cavity closed drainage bottle so that its connector is immersed in the water, and the heating cover is covered on the chest cavity closed drainage bottle;

[0028] F. Turn on the heating hood to heat the air inside the chest drainage bottle. Observe whether bubbles appear in the water during the heating process. Then turn off the heating hood.

[0029] G. Wait for the hot air in the chest closed drainage bottle to cool down and observe the water absorption of the chest closed drainage bottle; thereby further confirming the airtightness of the chest closed drainage bottle.

[0030] The present invention has the following beneficial effects: 1. The first detection device uses a hot air blower to fill the chest drainage bottle with hot air, which is very fast, taking only a few seconds. The hot air then cools and shrinks in volume, generating an attractive force. If the chest drainage bottle is airtight, the water in the liquid bottle is drawn into the detection tube and the water level is maintained at a certain height. If the airtightness is poor, the water in the liquid bottle cannot be retained in the detection tube. This allows for a preliminary test of the chest drainage bottle's airtightness.

[0031] The first detection device is compact and lightweight, suitable for carrying to the patient's ward for real-time testing of closed chest drainage bottles before use. The liquid in the liquid bottle is essentially sealed, making it difficult to spill, and can also be carried to the patient's ward for real-time testing. The first detection device does not use pressurization or other methods for testing, which will not damage the closed chest drainage bottle during testing, and it also performs testing quickly.

[0032] 2. During testing, if the water in the liquid bottle cannot be retained within the test tube, while the chest closed drainage bottle is most likely not airtight, there are also possibilities of poor airtightness at the tubing connection or the first detection device itself. The first detection device has a self-test function that allows it to quickly detect its own airtightness, reducing the risk of false positives.

[0033] 3. A second detection device is further provided to further test chest drainage bottles detected by the first detection device as poorly airtight. This device is used to eliminate chest drainage bottles that were misidentified by the first detection device due to poorly airtight tubing connections, ensuring accurate testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a structural diagram of a double-chamber chest closed drainage bottle;

[0035] Figure 2 is a structural diagram of a first detection device;

[0036] Figure 3 is a partial cross-sectional view of the first detection device;

[0037] Figure 4 is a structural diagram of a second detection device;

[0038] Figure 5 is a top view of the clamping structure;

[0039] Figure 6 is a diagram showing the usage status of the first detection device;

[0040] Figure 7 is a diagram showing the use status of the second detection device;

[0041] 1 , a first detection device 1 , a hot air blower 11 , a hot air blower connector 111 , a liquid bottle 12 , a bottle body 121 , a bottle cap 122 , an inner tube of the bottle 123 , a self-test tube 13 , a small detection hole 131 , a qualified self-test mark 132 , a three-way valve 14 , a detection tube 15 , a detection tube connector 151 , a large detection hole 152 , a qualified mark 153 for a single-chamber bottle, a qualified mark 154 for a double-chamber bottle, a qualified mark 155 for a triple-chamber bottle, a first base 16 , a second detection device 2 , a second base 21 , a positioning sleeve 211 , a guide rod 22 , a slider 23 , a liquid box 24 , a clamping structure 25 , a U-shaped clamp 251 , a side plate 2511 , a pressing plate 252 , a connecting rod 253 , an operating panel 254 , a spring 255 , an operating rod 256 , a heating cover 26 , a cover body 261 , an infrared heating lamp 262 , a closed chest drainage bottle 3 , and a pipeline 4 . DETAILED DESCRIPTION

[0042] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0043] like Figure 2 and Figure 3As shown, the air tightness detection device for closed chest drainage bottle includes a first detection device 1, which includes a hot air blower 11, a liquid bottle 12, a three-way valve 14, a transparent self-test tube 13 and a transparent detection tube 15; the hot air blower 11 has a hot air blower connector 111; the liquid bottle 12 includes a bottle body 121, a bottle cap 122 and a bottle inner tube 123, the bottle cap 122 is covered on the bottle body 121, the bottle cap 122 has a breathing port 1221, the bottle inner tube 123 is connected to the bottle cap 122 and extends to the lower part of the bottle body 121; the self-test tube 13 is vertical The self-test tube 13 is provided with a small detection hole 131, which is connected to the bottle inner tube 123; the three-way valve 14 is located above the self-test tube 13 and is connected to the self-test tube 13; the detection tube 15 is vertically provided above the three-way valve 14 and is connected to the three-way valve 14, the detection tube 15 has a large detection hole 152, and the top of the detection tube 15 has a detection tube joint 151; the three-way valve 14 can control the large detection hole 152 to be connected to the detection hole 131 or to the outside world.

[0044] The method for performing airtightness detection using the first detection device 1 is as follows: Figure 6 As shown, the steps are as follows:

[0045] A, add water to the liquid bottle 12; connect the cavities of the closed chest drainage bottle 3, and connect the closed chest drainage bottle 3 to the hot air blower connector 111 and the detection tube connector 151 using the pipe 4;

[0046] B. Turn on the hot air blower 11 to fill the chest closed drainage bottle 3 with hot air, and then turn off the hot air blower 11;

[0047] C. Wait for the hot air in the chest closed drainage bottle 3 to cool down, and observe the situation in which the water in the liquid bottle 12 is sucked into the detection tube 15 to determine the air tightness of the chest closed drainage bottle 3;

[0048] D. If the airtightness of the closed chest drainage bottle 3 is poor as detected in step C, connect the hot air blower connector 111 to the detection tube connector 151 using the pipe 4; turn on the hot air blower 11 to fill the detection tube 15 with hot air, and then turn off the hot air blower 11; wait for the hot air in the detection tube 15 to cool down, and observe whether the water in the liquid bottle 12 is sucked into the self-test tube 13 to further determine the airtightness of the closed chest drainage bottle 3.

[0049] The principle of step B is that the hot air cools and reduces its volume, thus generating suction. If the chest cavity closed drainage bottle 3 is airtight, the hot air inside the bottle cools and reduces its volume significantly due to its large volume, allowing the water in the liquid bottle 12 to be drawn into the detection tube 15 and maintaining a certain level of water. If the airtightness is poor, the water in the liquid bottle 12 cannot be retained in the detection tube 15. This allows a preliminary test of the airtightness of the chest cavity closed drainage bottle 3.

[0050] The first detection device 1 can usually determine that the chest drainage bottle 3 is airtight, and the tested chest drainage bottle 3 can be used after the test. However, if the first detection device 1 determines that the chest drainage bottle 3 is airtight, there are several possibilities: one is that the chest drainage bottle 3 is indeed airtight, the other is that the first detection device 1 is airtight, or the third is that the connection of the pipeline 4 is airtight. These two or three possibilities need to be eliminated.

[0051] The airtightness self-test of first detection device 1 in step D is used to eliminate the second possibility. The principle of airtightness testing in step D is the same as in steps B and C, except that the large detection hole 152 in detection tube 15 has a small volume, and the hot air cannot absorb much water after cooling. Therefore, a self-test tube 13 with a small inner hole is provided to facilitate observation of water absorption by detection tube 15.

[0052] Although the first detection device 1 cannot determine the airtightness of the chest closed drainage bottle 3 with absolute accuracy, the probability of the above two or three situations occurring is very low. Secondly, the detection result is accurate when the airtightness is good, but there are many possibilities for the detection result of poor airtightness. Thirdly, the first detection device is compact and lightweight, suitable for carrying to the hospital ward for real-time testing, and the detection speed is very fast. Therefore, the first detection device 1 is very practical.

[0053] The hot air blower 11 of the present invention is electric, and the three-way valve 14 can be manually controlled or a battery valve. As for the specific structure of the first detection device 1, the present invention preferably selects the following: the chest closed drainage bottle air tightness detection device includes a first base 16; the three-way valve 14 is an electrically controlled valve; the first base 16 includes a base shell and a power supply and a controller arranged in the base shell, the power supply is electrically connected to the hot air blower 11, the three-way valve 14 and the controller, and the controller is electrically connected to the hot air blower 11 and the three-way valve 14; the controller can control the hot air blower 11 to turn off after turning on for a period of time; the controller can control the three-way valve 14 so that when the hot air blower 11 is turned on, the large detection hole 152 is connected to the outside world, and when the hot air blower 11 is turned off, the large detection hole 152 is connected to the small detection hole 131.

[0054] In this way, a switch can be turned on, and the present invention can automatically complete the start and stop of the hot air blower 11 and the adjustment of the three-way valve 14, with a high degree of automation.

[0055] As described in the background technology, there are three types of closed chest drainage bottles: single-chamber, double-chamber, and triple-chamber. The more cavities a bottle has, the larger its internal volume is, and the amount of water absorbed during testing is also different. Therefore, the following arrangement can be made: the test tube 15 has a single-chamber bottle qualification mark 153, a double-chamber bottle qualification mark 154, and a triple-chamber bottle qualification mark 155, which are arranged in sequence from bottom to top. If the water level of the absorbed water can reach the corresponding qualification mark during testing, it means that the closed chest drainage bottle 3 has good airtightness; if not, it is considered that the airtightness is poor. Similarly, a self-test qualification mark 132 can also be set on the self-test tube 13. If the water level can reach the self-test qualification mark 132 during the self-test of the first detection device 1, it means that the airtightness of the first detection device 1 is good; otherwise, it is considered that the airtightness is poor.

[0056] The airtightness test performed using the first detection device 1 can basically meet the requirements. However, as mentioned above, there is still a small probability that the airtightness of the connection of the pipeline 4 is not good, which may cause the chest closed drainage bottle 3 to be mistakenly judged as having poor airtightness. If no further judgment is made and the chest closed drainage bottle 3 is deemed to be unqualified, it will result in a waste of medical resources. To this end, the present invention is further improved as follows: the air tightness detection device for the closed chest drainage bottle includes a second detection device 2, the second detection device 2 includes a second base 21, a liquid box 24, a guide rod 22, a slider 23, a clamping structure 25 and a heating cover 26; the liquid box 24 is placed on the second base 21, the guide rod 22 is located next to the liquid box 24 and is connected to the second base 21, there are two sliders 23, both sliders 23 are mounted on the guide rod 22, the clamping structure 25 is connected to the lower slider 23, the clamping structure 25 can clamp the closed chest drainage bottle 3, the heating cover 26 is connected to the upper slider 23, the heating cover 26 can cover the closed chest drainage bottle 3 and heat it.

[0057] After adding the second detection device 2, the present invention can further detect the chest cavity closed drainage bottle 3 that was previously determined to have poor airtightness by using the second detection device 2. The specific steps are as follows: Figure 7 As shown:

[0058] E. The liquid box 24 is filled with water, the clamping structure 25 clamps the inverted chest cavity closed drainage bottle 3 so that its connector is immersed in the water, and the heating cover 26 is covered on the chest cavity closed drainage bottle 3;

[0059] F. Turn on the heating cover 26 to heat the air inside the chest closed drainage bottle 3 and observe whether bubbles appear in the water during the heating process; then turn off the heating cover 26;

[0060] G. Wait for the hot air in the chest cavity closed drainage bottle 3 to cool down, and observe the water absorption of the chest cavity closed drainage bottle 3; thereby further confirming the airtightness of the chest cavity closed drainage bottle 3.

[0061] In step E, the inverted chest drainage bottle 3 is first clamped with the clamping structure 25. The slider 23 is then moved to lower the clamping structure 25, allowing the connector of the chest drainage bottle 3 to enter the water. The slider 23 is first moved to raise the heating cover 26, leaving enough space for the chest drainage bottle 3 to be placed within the clamping structure 25. Once the connector of the chest drainage bottle 3 is in the water, the slider 23 is moved to lower the heating cover 26 so that it covers the chest drainage bottle 3.

[0062] In step F, the air inside closed chest drainage bottle 3 is heated, increasing its volume. This allows some of the hot air to escape, causing bubbles to form in the water. In step G, the hot air decreases in volume, generating an attractive force that draws water into closed chest drainage bottle 3. If bubbles appear in the water and water is drawn into closed chest drainage bottle 3, this indicates a misjudgment by first detection device 1 due to poor airtightness at the connection of pipe 4. If no bubbles appear in the water and water is not drawn into closed chest drainage bottle 3, this indicates that closed chest drainage bottle 3 is indeed poorly airtight.

[0063] Second detection device 2 eliminates the need for piping 4 and provides highly accurate results, but it is bulky. The heating temperature of heating hood 26 must be controlled between 50 and 60 degrees Celsius, which takes a long time to heat the chest closed drainage bottle 3. Liquid cartridge 24 also holds a significant amount of water. Therefore, it is unsuitable for real-time testing in a ward or for large-scale testing. Therefore, second detection device 2 is used to detect chest closed drainage bottles 3 that are deemed airtight by first detection device 1. This second detection device 2 serves as a supplementary test to avoid misjudgments that could lead to wasted medical resources.

[0064] In order to ensure that the liquid box 24 is positioned accurately, the second base 21 preferably has a positioning sleeve 211 , and the liquid box 24 is located in the positioning sleeve 211 .

[0065] The specific structure of the clamping structure 25 is preferably as follows: the clamping structure 25 includes a U-shaped clamping body 251, a clamping plate 252, a connecting rod 253, an operating plate 254 and a spring 255. The clamping plate 252 is located in the U-shaped clamping body 251, and the operating plate 254 is located on the outside of a side plate 2511 of the U-shaped clamping body 251. The connecting rod 253 passes through the side plate 2511 and is connected to the clamping plate 252 and the operating plate 254. The spring 255 is arranged between the clamping plate 252 and the operating plate 254, and the spring 255 presses the clamping plate 252 inside.

[0066] Pull out the operating plate 254, insert the closed-cavity drainage bottle 3, and then release the operating plate 254. The spring 255 pushes the pressing plate 252 inward, and the pressing plate 252 and the U-shaped clamp 251 together press the closed-cavity drainage bottle 3. The elastic force of the spring 255 clamps the closed-cavity drainage bottle 3 to prevent it from being damaged by the clamping.

[0067] In order to further facilitate operation, the clamping structure 25 preferably includes an operating rod 256, which passes through the operating plate 254 and is connected to the side plate 2511. When operating in this way, the thumb supports the operating rod 256 and the remaining fingers can pull the operating plate 254 outward, and the operation can be completed with one hand.

[0068] The specific structure of the heating cover 26 is preferably as follows: the heating cover 26 includes a cover body 261 and an infrared heating lamp 262 arranged in the cover body 261.

Claims

1. A device for detecting air tightness of a closed chest drainage bottle, characterized in that: The invention comprises a first detection device (1) and a second detection device (2); the first detection device (1) comprises a hot air blower (11), a liquid bottle (12), a three-way valve (14), a transparent self-test tube (13) and a transparent detection tube (15); the hot air blower (11) is provided with a hot air blower connector (111); the liquid bottle (12) comprises a bottle body (121), a bottle cap (122) and a bottle inner tube (123); the bottle cap (122) is covered on the bottle body (121), the bottle cap (122) is provided with a breathing port (1221), the bottle inner tube (123) is connected to the bottle cap (122) and extends to the lower part of the bottle body (121); the self-test tube (13) is vertically The self-test tube (13) is provided above the bottle cap (122) and connected to the bottle cap (122), and a detection hole (131) is provided in the self-test tube (13), and the detection hole (131) is communicated with the bottle inner tube (123); the three-way valve (14) is located above the self-test tube (13) and connected to the self-test tube (13); the detection tube (15) is vertically provided above the three-way valve (14) and connected to the three-way valve (14), and a detection large hole (152) is provided in the detection tube (15), and a detection tube joint (151) is provided at the top end of the detection tube (15); the three-way valve (14) can control the detection large hole (152) to be communicated with the detection hole (131) or to be communicated with the outside world; The second detection device (2) comprises a second base (21), a liquid box (24), a guide rod (22), a slider (23), a clamping structure (25) and a heating cover (26); the liquid box (24) is placed on the second base (21), the guide rod (22) is located next to the liquid box (24) and is connected to the second base (21), there are two sliders (23), both of which are mounted on the guide rod (22), the clamping structure (25) is connected to the lower slider (23), and the clamping structure (25) can clamp the chest cavity closed drainage bottle (3), and the heating cover (26) is connected to the upper slider (23), and the heating cover (26) can cover the chest cavity closed drainage bottle (3) and heat it.

2. The air tightness detection device for closed chest drainage bottle according to claim 1, characterized in that: The invention comprises a first base (16); the three-way valve (14) is an electrically controlled valve; the first base (16) comprises a base shell and a power supply and a controller arranged in the base shell; the power supply is electrically connected to the hot air blower (11), the three-way valve (14) and the controller; the controller is electrically connected to the hot air blower (11) and the three-way valve (14); the controller can control the hot air blower (11) to be turned on for a period of time and then turned off; the controller can control the three-way valve (14) so ​​that when the hot air blower (11) is turned on, the large detection hole (152) is connected to the outside world, and when the hot air blower (11) is turned off, the large detection hole (152) is connected to the small detection hole (131).

3. The air tightness detection device for closed chest drainage bottle according to claim 2, characterized in that: The detection tube (15) has a single-chamber bottle qualified mark (153), a double-chamber bottle qualified mark (154) and a triple-chamber bottle qualified mark (155) which are sequentially arranged from bottom to top; and the self-test tube (13) has a self-test qualified mark (132).

4. The air tightness detection device for closed chest drainage bottle according to claim 1, characterized in that: The second base (21) is provided with a positioning sleeve (211), and the liquid box (24) is located in the positioning sleeve (211).

5. The air tightness detection device for closed chest drainage bottle according to claim 1, characterized in that: The clamping structure (25) includes a U-shaped clamping body (251), a pressing plate (252), a connecting rod (253), an operating plate (254) and a spring (255). The pressing plate (252) is located in the U-shaped clamping body (251). The operating plate (254) is located on the outside of a side plate (2511) of the U-shaped clamping body (251). The connecting rod (253) passes through the side plate (2511) and is connected to the pressing plate (252) and the operating plate (254). The spring (255) is arranged between the pressing plate (252) and the operating plate (254). The spring (255) presses the pressing plate (252) from the inside.

6. The air tightness detection device for closed chest drainage bottle according to claim 5, characterized in that: The clamping structure (25) includes an operating rod (256), which passes through the operating plate (254) and is connected to the side plate (2511).

7. The air tightness detection device for closed chest drainage bottle according to claim 1, characterized in that: The heating cover (26) includes a cover body (261) and an infrared heating lamp (262) arranged in the cover body (261).

8. A method for detecting the air tightness of a closed chest drainage bottle, characterized in that: The first detection is performed using the first detection device (1) of the chest closed drainage bottle air tightness detection device according to any one of claims 1 to 7, and the steps are as follows: A. Add water to the liquid bottle (12); connect the cavities of the chest closed drainage bottle (3); and connect the chest closed drainage bottle (3) to the hot air blower connector (111) and the detection tube connector (151) using the pipeline (4); B. Turn on the hot air blower (11) to fill the chest closed drainage bottle (3) with hot air, and then turn off the hot air blower (11); C. Wait for the hot air in the chest cavity closed drainage bottle (3) to cool down, and observe the situation that the water in the liquid bottle (12) is sucked into the detection tube (15) to judge the air tightness of the chest cavity closed drainage bottle (3); D. If the airtightness of the chest cavity closed drainage bottle (3) is poor as determined by the test in step C, the hot air blower connector (111) is connected to the test tube connector (151) by means of the pipe (4); the hot air blower (11) is turned on to fill the test tube (15) with hot air, and then the hot air blower (11) is turned off; the hot air in the test tube (15) is allowed to cool down, and the water in the liquid bottle (12) is observed to be sucked into the test tube (13) to further determine the airtightness of the chest cavity closed drainage bottle (3); The second detection is performed using the second detection device (2) of the chest closed drainage bottle air tightness detection device according to any one of claims 1 to 7, and the steps are as follows: E. The liquid box (24) is filled with water, the clamping structure (25) clamps the inverted chest cavity closed drainage bottle (3) so that its connector enters the water, and the heating cover (26) is covered on the chest cavity closed drainage bottle (3); F. Turn on the heating cover (26) to heat the closed chest drainage bottle (3) to heat the air inside it, and observe whether bubbles appear in the water during the heating process; then turn off the heating cover (26); G. Wait for the hot air in the chest cavity closed drainage bottle (3) to cool down, and observe the water absorption of the chest cavity closed drainage bottle (3); thereby further confirming the airtightness of the chest cavity closed drainage bottle (3).

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